Patent Publication Number: US-2022234387-A1

Title: Easy assembling and disassembling wheel component

Description:
BACKGROUND OF THE DISCLOSURE 
     1. Field of the Disclosure 
     The present disclosure relates to a stroller, and in particular to an easy assembling and disassembling wheel component, which has a simple structure and can be quickly and conveniently assembled and disassembled. 
     2. Description of the Prior Art 
     The existing stroller generally includes four wheel sets, in which the front two wheels are universal wheels and the rear two wheels are directional wheels, and each wheel set is pivotally connected to a wheel seat directly fixed to a supporting foot of the vehicle. 
     SUMMARY OF THE DISCLOSURE 
     The object of the present disclosure is to provide an easy assembling and disassembling wheel component, which has a simple structure and can be quickly and conveniently assembled and disassembled. 
     In order to achieve the above object, the present disclosure provides an easy assembling and disassembling wheel component, including a wheel, a rotation shaft and an engaging member, wherein a mounting hole is disposed on a center of the wheel, an accommodating groove is disposed on one end of the rotation shaft, the engaging member is movably engaged in the accommodating groove; the engaging member is swingable between a first position and a second position, when the engaging member is in the first position, the engaging member and the rotation shaft enable to pass through the mounting hole of the wheel; when the engaging member is in the second position, the rotation shaft is connected with and locked to the wheel. 
     The present disclosure provides the engaging member movably engaged in a connection portion of the rotation shaft. When the rotation shaft is connected to the wheel, the engaging member may be swung to a first position or a second position. When the engaging member is swung to the first position, the engaging member and the rotation shaft may pass through the mounting hole of the wheel so as to achieve the purpose of disassembling the wheel; when the engaging member is swung to the second position, the engaging member is engaged with the mounting hole, such that the wheel may not be disengaged from the rotation shaft, for achieving the purpose of connecting and locking the wheel. Thus, the wheel may be quickly assembled and disassembled by only operating the engaging member, which causes a simple structure and can achieve very convenient maintenance and use. 
     In an embodiment, the accommodating groove penetrates two lateral surfaces and an end surface of the rotation shaft, and the connection portion is disposed in the accommodating groove and passes through the engaging member. 
     In an embodiment, the first position is a position to which the engaging member is swung such that a length direction of the engaging member is the same as a central axis extension direction of the rotation shaft; the second position is a position to which the engaging member is swung such that the length direction of the engaging member intersects with the central axis extension direction of the rotation shaft and the engaging member presses against an edge of the mounting hole. 
     In an embodiment, the engaging member has an elongated ring-shaped structure. 
     Specifically, an elongated hole is formed in the middle of the engaging member, an engaging region is disposed in the middle of the elongated hole, and the connection portion is engaged with the engaging region when the rotation shaft is locked in the wheel. 
     In an embodiment, the connection portion is a connection shaft. 
     In an embodiment, the easy assembling and disassembling wheel component further includes a wheel cover for covering one side of the wheel to shield the engaging member. A positioning rib for positioning the engaging member is disposed on an inner side of the wheel cover. 
     An easy assembling and disassembling wheel component includes a wheel, a rotation shaft, an engaging member and an elastic element, wherein a mounting hole is disposed on a center of the wheel, an engaging groove is disposed on one end of the rotation shaft, the rotation shaft is able to extend into or get out of the mounting hole, the engaging member is movably disposed on one side of the wheel, the elastic element provides an elastic force for engaging the engaging member in the engaging groove, such that the rotation shaft is connected with and locked to the wheel, and the rotation shaft is unlocked with and separated from the wheel when the engaging member is disengaged from the engaging groove. 
     The present disclosure provides the engaging member movably engaged on the wheel, such that the engaging member may be moved to and engaged with the engaging groove of the rotation shaft when the rotation shaft is connected with the wheel, for achieving the purpose of locking the rotation shaft and the wheel. When the engaging member is moved to disengage from the engaging groove, the purpose of unlocking the rotation shaft and the wheel is achieved. Thus, the wheel may be quickly assembled and disassembled by only operating the engaging member, which causes a simple structure and can achieve very convenient maintenance and use. 
     In an embodiment, an elongated hole, through which the rotation shaft passes, is disposed on the engaging member, one end of the elongated hole includes a first engaging region, the other end of the elongated hole includes a second engaging region, and the first engaging region and the second engaging region have different curvatures. 
     Specifically, a diameter of a curved edge of the first engaging region is smaller than a diameter of the rotation shaft, and a diameter of a curved edge of the second engaging region is larger than the diameter of the rotation shaft. Thus, when the rotation shaft is located on the first engaging region, the rotation shaft is engaged with an edge of the first engaging region, and when the rotation shaft is located on the second engaging region, the rotation shaft may directly pass through the second engaging region to disengage from the engaging member, for achieving the purpose of locking or unlocking. 
     In an embodiment, one end of the engaging member is pivotally connected to one side of the wheel, the other end of the engaging member includes an engaging region, the engaging member is engaged in the engaging groove after being rotated in a direction, and the engaging member is disengaged from the engaging groove after being rotated in another direction. 
     In an embodiment, a pushing portion extends from one side of the engaging member. The easy assembling and disassembling wheel component further includes a wheel cover slidably arranged in the middle of the wheel, and a driving portion is disposed on the wheel cover and is able to drive the pushing portion by pressing the wheel cover. The wheel cover is arranged to not only shield the engaging member to make the appearance of the wheel more beautiful and generous, but also may act as an operating member for operating the engaging member, thereby improving the convenience of operation. 
     Specifically, the driving portion includes a driving inclined surface, the pushing portion includes a matching inclined surface, and the driving inclined surface slidably abuts against the matching inclined surface. Using the driving inclined surface and the matching inclined surface may make the wheel cover to smoothly drive the engaging member, for further improving the convenience of operation. 
     An easy assembling and disassembling wheel component includes a wheel, a rotation shaft and an engaging member, a mounting hole is disposed on a center of the wheel, an engaging groove is disposed on one end of the rotation shaft, the rotation shaft is able to extend into or get out of the mounting hole, the engaging member is arranged on one side of the wheel and has an elastic portion, and the elastic portion elastically engages into the engaging groove and enables the rotation shaft to be connected with and locked to the wheel. 
     The present disclosure provides the engaging member, and an elastic portion is disposed on one end of the engaging member and is used to provide a spring-back property. Thus, when the elastic portion is in a natural state, the elastic portion may spring back to engage in the engaging groove of the rotation shaft, such that the rotation shaft is connected with and locked to the wheel; when the elastic portion is stretched under force, the elastic portion may be separated from the engaging groove of the rotation shaft, so as to unlock the rotation shaft from the wheel and further achieve the purpose of unlocking the wheel and the rotation shaft. Thus, the wheel may be quickly assembled and disassembled by only operating the elastic portion, which causes a simple structure and can achieve very convenient maintenance and use. 
     In an embodiment, the engaging member includes a U-shaped structure, and two ends of the U-shaped structure form the elastic portions. 
     In an embodiment, the easy assembling and disassembling wheel component further includes an operating member slidably arranged on one side of the wheel to push the elastic portion away from the engaging groove. Thus, the convenience of the operation may be improved. 
     Specifically, tail ends of the elastic portions extend out of guild portions, the operating member includes oblique holes, the guild portions are slidably arranged in the oblique holes to drive the elastic portions to open. By the arrangement of the guild portion, the operating member can more easily drive the elastic portion, thereby improving the convenience of the operation. 
     In an embodiment, the easy assembling and disassembling wheel component further includes a wheel cover arranged on one side of the wheel and covering on the operating member. The wheel cover is arranged to shield the engaging member to make the appearance of the wheel more beautiful and generous. 
     An easy assembling and disassembling wheel component includes a wheel, a rotation shaft, an engaging member and an elastic element, wherein one end of the rotation shaft is fixedly connected with a center of the wheel, the other end of the rotation shaft includes an engaging groove and is able to extend into or get out of a supporting foot of the frame, the engaging member is movably arranged on the supporting foot, the elastic element provides an elastic force for engaging the engaging member in the engaging groove, such that the rotation shaft is connected with and locked to the supporting foot, and the rotation shaft is unlocked with and separated from the supporting foot when the engaging member is disengaged from the engaging groove. 
     The present disclosure provides the engaging member for connecting the rotation shaft and the wheel, and the engaging member is movably arranged on the supporting foot. When the rotation shaft is connected to the supporting foot, the engaging member may be moved to the engaging groove of the rotation shaft and engaged in the engaging groove, for achieving the purpose of locking the wheel; when the engaging member is moved to be disengaged from the engaging groove, the purpose of unlocking the wheel is achieved. Thus, the wheel may be quickly assembled and disassembled by only operating the engaging member, which causes a simple structure and can achieve very convenient maintenance and use. 
     In an embodiment, an elongated hole, through which the rotation shaft passes, is disposed on the engaging member, one end of the elongated hole includes a first engaging region, the other end of the elongated hole includes a second engaging region, and the first engaging region and the second engaging region have different curvatures. 
     Specifically, a diameter of a curved edge of the first engaging region is smaller than a diameter of the rotation shaft, and a diameter of a curved edge of the second engaging region is larger than the diameter of the rotation shaft. Thus, when the rotation shaft is located at the first engaging region, the rotation shaft is able to engage with an edge of the first engaging region, and when the rotation shaft is located at the second engaging region, the rotation shaft may directly pass through the second engaging region and disengage from the engaging member, for achieving the purpose of locking and unlocking. 
     These and other objectives of the present disclosure will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a state diagram of an easy assembling and disassembling wheel component according to a first embodiment of the present disclosure assembled on a frame. 
         FIG. 2  is a structural diagram of the easy assembling and disassembling wheel component according to the first embodiment of the present disclosure. 
         FIG. 3  is a structural diagram of an engaging member of the easy assembling and disassembling wheel component according to the first embodiment of the present disclosure. 
         FIG. 4  is a state diagram of the engaging member of the easy assembling and disassembling wheel component according to the first embodiment of the present disclosure in an unlock position. 
         FIG. 5  is a state diagram of the engaging member of the easy assembling and disassembling wheel component according to the first embodiment of the present disclosure in a position between the unlock position and the lock position. 
         FIG. 6  is a state diagram of the engaging member of the easy assembling and disassembling wheel component according to the first embodiment of the present disclosure in the lock position. 
         FIG. 7  is a cross-sectional view of the engaging member of the easy assembling and disassembling wheel component according to the first embodiment of the present disclosure in the lock position. 
         FIG. 8  is a state diagram of an easy assembling and disassembling wheel component according to a second embodiment of the present disclosure assembled on the frame. 
         FIG. 9  is a structural diagram of the easy assembling and disassembling wheel component according to the second embodiment of the present disclosure. 
         FIG. 10  is a structural diagram of an engaging member being engaged on a rotation shaft according to the second embodiment of the present disclosure. 
         FIG. 11  is a structural diagram of the engaging member according to the second embodiment of the present disclosure. 
         FIG. 12  is a state diagram of a wheel cover of the easy assembling and disassembling wheel component according to the second embodiment of the present disclosure after the wheel cover being pressed. 
         FIG. 13  is a state diagram of an easy assembling and disassembling wheel component according to a third embodiment of the present disclosure assembled on the frame. 
         FIG. 14  is a structural diagram of the easy assembling and disassembling wheel component according to the third embodiment of the present disclosure. 
         FIG. 15  is a structural diagram of an engaging member engaged on a rotation shaft according to the third embodiment of the present disclosure. 
         FIG. 16  is a structural diagram of the engaging member according to the third embodiment of the present disclosure. 
         FIG. 17  is a state diagram of the easy assembling and disassembling wheel component according to the third embodiment of the present disclosure before the wheel cover being pressed. 
         FIG. 18  is a state diagram of the easy assembling and disassembling wheel component according to the third embodiment of the present disclosure after the wheel cover being pressed. 
         FIG. 19  is a state diagram of the easy assembling and disassembling wheel component according to the third embodiment of the present disclosure when being unlocked. 
         FIG. 20  is a structural diagram of an easy assembling and disassembling wheel component according to a fourth embodiment of the present disclosure. 
         FIG. 21  is a structural diagram of an engaging member engaged on a rotation shaft according to the fourth embodiment of the present disclosure. 
         FIG. 22  is a structural diagram of the engaging member according to the fourth embodiment of the present disclosure. 
         FIG. 23  is a state diagram of an easy assembling and disassembling wheel component according to a fifth embodiment of the present disclosure assembled on the frame. 
         FIG. 24  is a state diagram of an operating member connected to a wheel according to the fifth embodiment of the present disclosure. 
         FIG. 25  is a structural diagram of the easy assembling and disassembling wheel component according to the fifth embodiment of the present disclosure. 
         FIG. 26  is a structural diagram of an engaging member arranged on the wheel according to the fifth embodiment of the present disclosure. 
         FIG. 27  is a structural diagram of the engaging member according to the fifth embodiment of the present disclosure. 
         FIG. 28  is a state diagram of an easy assembling and disassembling wheel component according to a sixth embodiment of the present disclosure assembled on the frame. 
         FIG. 29  is a structural diagram of the easy assembling and disassembling wheel component according to the sixth embodiment of the present disclosure. 
         FIG. 30  is a structural diagram of an engaging member connected to a rotation shaft according to the sixth embodiment of the present disclosure. 
         FIG. 31  is a structural diagram of the engaging member according to the sixth embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The wheels are made of rubber material. When the wheels wear out after being used for a period of time and need to be replaced, ordinary users cannot manually replace the wheels since the connection of the wheel is inconvenient. For example, the hairpin type wheel set, which is currently and more commonly used on the market, needs to be disassembled and assembled with tools. For ordinary users, the assembly and disassembly of the wheel sets are very troublesome, the maintenance thereof is difficult, and the use thereof is inconvenient. So, the present disclosure provides an easy assembling and disassembling wheel component. 
     In order to explain in detail the technical contents, structural features and achieved effects of the present disclosure, the following detailed descriptions are given in conjunction with the embodiments and accompanying drawings. 
     Referring to  FIGS. 1-7 , the structure according to a first embodiment of the present disclosure is shown below. 
     Referring to  FIGS. 1-3 , the easy assembling and disassembling wheel component  100  according to the embodiment includes a wheel  110 , a rotation shaft  120  and an engaging member  130 , an accommodating chamber  111  is disposed on a center of the wheel  110 , a mounting hole  112  is disposed on a center of the accommodating chamber  111 , one end of rotation shaft  120  includes an accommodating groove  121  penetrating two lateral surfaces and an end surface thereof, and the other end of the rotation shaft  120  is connected to the frame. A connection portion  122  is disposed in the accommodating groove  121  and passes through the engaging member  130 . The connection portion  122  is a connection shaft. The engaging member  130  is movably engaged in the accommodating groove  121 ; and the engaging member  130  may be swung between a first position and a second position. When the engaging member  130  is in the first position, the engaging member  130  and the rotation shaft  120  may pass through a mounting hole  112  of the wheel  110 ; when the engaging member  130  is in the second position, the rotation shaft  120  is connected with and locked to the wheel  110 . The first position is a position to which the engaging member  130  is swung such that a length direction of the engaging member is the same as a central axis extension direction of the rotation shaft  120 ; the second position is a position to which the engaging member  130  is swung such that the length direction the engaging member  130  intersects with the central axis extension direction of the rotation shaft  120 , and the engaging member  130  presses against an edge of the mounting hole  112 . 
     Further as shown in  FIG. 3 , the engaging member  130  has an elongated ring-shaped structure. An elongated hole  131  is formed in the middle of the engaging member  130 , an engaging region  132  is disposed in the middle of the elongated hole  131 , arc-shape hole regions  133  are formed on two lateral sides thereof. When the rotation shaft  120  is locked in the wheel  110 , the connection portion  122  is engaged with the engaging region  132 . Specifically, an edge of the engaging member  130  is in a corrugated structure to form the engaging region  132 , and has a certain elastic force. When the connection portion  122  reaches the corrugated structure, the corrugated structure is elastically stretched and allows the connection portion  122  to pass through; when the connection portion  122  passes over the corrugated structure, the corrugated structure springs back and the engaging region  132  engages with the connection portion  122 . 
     The easy assembling and disassembling wheel component  100  further includes a wheel cover  140 , which is covered on the accommodating chamber  111  of the wheel  110  to shield the engaging member  130 . A positioning rib  141  for positioning the engaging member  130  is disposed on the inner side of the wheel cover  140 . 
     Referring to  FIGS. 4-7 , when the wheel  110  needs to be assembled and locked, it is only necessary to swing the engaging member  130  to such a position that a length direction of the engaging member  130  is the same as a central axis extension direction of the rotation shaft  120 , the wheel  110  is sleeved on the rotation shaft  120 , and the rotation shaft  120  passes through the mounting hole  112 . Afterwards, the engaging member  130  is swung to such a position that the length direction thereof is perpendicular to the central axis extension direction of the rotation shaft  120 . At the same time, the engaging member  130  may be slid until that the engaging region  132  is engaged with the connection portion  122 , and the engaging member  130  is engaged on a side of the wheel  110 . Then, the rotation shaft  120  cannot get out of the mounting hole  112  due to the complete locking of the engaging member  130 , and then the rotation shaft  120  may be connected with and locked to the wheel  110 . 
     When the wheel  110  needs to be unlocked and disassembled, it is only necessary to force the engaging member  130  to move, so as to make the engaging region  132  move away from the connection portion  122  and then swing the engaging member  130 , such that the length direction of the engaging member  130  is the same as the central axis extension direction of the rotation shaft  120 . At this time, the rotation shaft  120  and the engaging member  130  may pass through the mounting hole  112 , and the wheel  110  can be disengaged from the rotation shaft  120 . 
     The present disclosure provides the engaging member  130 , such that the engaging member  130  is movably engaged with the connection portion  122  of the rotation shaft  120 . When the wheel  110  is connected with the rotation shaft  120 , the engaging member  130  may be swung to such a position that the length direction thereof is the same as the central axis extension direction of the rotation shaft  120 , or may be swung to such a position that the length direction thereof intersects with the central axis extension direction of the rotation shaft  120 . Therefore, when the both are in the same direction, the engaging member  130  and the rotation shaft  120  may pass through the mounting hole  112  of the wheel  110  to achieve the purpose of disassembling the wheel  110 ; when the both intersect with each other, the engaging member  130  is engaged on the mounting hole  112 , such that the wheel  110  cannot be disengaged from the rotation shaft  120 , to achieve the purpose of connecting and locking the wheel  110 . Thus, the wheel  110  may be quickly assembled and disassembled by only operating the engaging member  130 , which causes a simple structure and can achieve very convenient maintenance and use. 
     As shown in  FIGS. 8-12 , the structure according to a second embodiment of the present disclosure is shown below. 
     Referring to  FIGS. 8-11 , the easy assembling and disassembling wheel component  200  according to the embodiment includes a wheel  210 , a rotation shaft  220 , an engaging member  230  and an elastic element  240 , an accommodating chamber  211  is disposed on a center of the wheel  210 , a mounting hole  212  is disposed in the middle of the accommodating chamber  211 , an annular engaging groove  221  is disposed on one end of the rotation shaft  220  so that the rotation shaft  220  may extend into or get out of the mounting hole  212 , and the engaging member  230  may move along a radial direction of the wheel  210  and is arranged on one side of the wheel  210 . The elastic element  240  provides an elastic force for engaging the engaging member  230  in the engaging groove  221  so as to connect and lock the rotation shaft  220  to the wheel  210 . The elastic element  240  is a compression spring, one end of which abuts against the engaging member  230 , and the other end of which abuts against the wheel  210 . The rotation shaft  220  may be unlocked and separated from the wheel  210  when the engaging member  230  is disengaged with the engaging groove  221 . 
     Further as shown in  FIG. 11 , specifically, an elongated hole  231 , through which the rotation shaft  220  passes, is disposed on the engaging member  230 . One end of the elongated hole  231  includes a first engaging region  232 , the other end thereof includes a second engaging region  233 , and the first engaging region  232  and the second engaging region  233  have different curvatures. Specifically, the edge of the first engaging region  232  is in a circular arc shape, and the diameter of the curved edge of the first engaging region  232  is smaller than the diameter of the rotation shaft  220 . The edge of the second engaging region  233  is in a circular arc shape, and the diameter of the curved edge of the second engaging region  233  is larger than the diameter of the rotation shaft  220 . The edge of the elongated hole  231  between the first engaging region  232  and the second engaging region  233  is straight. In this way, when the rotation shaft  220  is at the first engaging region  232 , the rotation shaft  220  is able to engage with the edge of the first engaging region  232 ; and when the rotation shaft  220  is at the second engaging region  233 , the rotation shaft  220  may directly pass through the second engaging region  233  and disengage from the engaging member  230 , for achieving the purpose of locking or unlocking. 
     Further as shown in  FIGS. 11 and 12 , a pushing portion  234  extends from one side of the engaging member  230 , and a matching inclined surface  235  is disposed on the pushing portion  234 . The easy assembling and disassembling wheel component  200  further includes a wheel cover  250 , which is arranged in the middle of the wheel  210  and may be slid along a central axis direction of the rotation shaft  220 . The wheel cover  250  includes a driving portion  251 , the driving portion  251  includes a driving inclined surface  252 , and the driving inclined surface  252  abuts against and slides on the matching inclined surface  235 . Pressing the wheel cover  250  along the axial direction of the rotation shaft  220  allows the driving portion  251  to drive the pushing portion  234  and thereby drive the engaging member  230  to slide. The arrangement of the wheel cover  250  may not only shield the engaging member  230  to make the appearance of the wheel  210  more beautiful and generous, but also be used as an operating member for operating the engaging member  230 , thereby improving the convenience of operation. The use of the driving inclined surface  252  and the matching inclined surface  235  may allow the wheel cover  250  to drive the engaging member  230  more smoothly, and further improve the convenience of operation. 
     Referring to  FIGS. 10 and 11 , when the wheel  210  needs to be assembled and locked, the wheel cover  250  pushes the engaging member  230  to slide by only pressing and turning the wheel cover  250 , such that the second engaging region  233  directly faces to the mounting hole  212 . At this time, the rotation shaft  220  passes through the mounting hole  212  and the second engaging region  233 , and the wheel  210  is sleeved on the rotation shaft  220 . After that, the engaging member  230  is released, and the engaging member  230  is restored under the elastic force of the elastic element  240 . At this time, the engaging member  230  slides and the first engaging region  232  directly faces the mounting hole  212 , and the edge of the first engaging region  232  is engaged in the engaging groove  221 . Then, the rotation shaft  220  cannot get out of the mounting hole  212  due to the complete locking of the engaging member  230 , and then the rotation shaft  220  may be connected with and locked to the wheel  210 . 
     Referring to  FIG. 12 , when the wheel  210  needs to be unlocked and disassembled, it is only necessary to press the wheel cover  250 , such that the wheel cover  250  drives the engaging member  230 , and the engaging member  230  can be slid and compress the elastic element  240 . The second engaging region  233  directly faces the mounting hole  212  again. At this time, the rotation shaft  220  is disengaged from the second engaging region  233  and the mounting hole  212 , and the wheel  210  can be disengaged from the rotation shaft  220 . 
     The present disclosure provides the engaging member  230 , such that the engaging member  230  is movably arranged on the wheel  210 . When the wheel  210  is connected with the rotation shaft  220 , the engaging member  230  may be moved to the engaging groove  221  of the rotation shaft  220  and engaged with the engaging groove  221 , so as to achieve the purpose of locking the wheel  210  and the rotation shaft  220 ; when the engaging member  230  is moved to disengage from the engaging groove  221 , the purpose for unlocking the wheel  210  and the rotation shaft  220  is achieved. Thus, the wheel  210  may be quickly assembled and disassembled by only operating the engaging member  230 , which causes a simple structure and can achieve very convenient maintenance and use. 
     As shown in  FIGS. 13-19 , the structure according to a third embodiment of the present disclosure is shown below. 
     Further as shown in  FIGS. 13-16 , the easy assembling and disassembling wheel component  300  according to the embodiment includes a wheel  310 , a rotation shaft  320 , an engaging member  330  and an elastic element  340 . An accommodating chamber  311  is disposed in the middle of the wheel  310 . A mounting hole  312  is disposed on a center of the accommodating chamber  311 . An annular engaging groove  321  is disposed on one end of the rotation shaft  320 , and the rotation shaft  320  is able to extend into or get out of the mounting hole  312 . The engaging member  330  is arranged on one side of the wheel  310 . One end of the engaging member  330  is pivotally connected to one side of the wheel  310  via a shaft pin  350 , and the other end of the engaging member  330  includes an engaging region  331 . The engaging region  331  is recessed. The engaging member  330  may be engaged in the engaging groove  321  or disengaged from the engaging groove  321  after the engaging member  330  rotates along the shaft pin  350 . The elastic element  340  provides an elastic force for engaging the engaging member  330  into the engaging groove  321 , such that the rotation shaft  320  is connected with and locked to the wheel  310 . The elastic element  340  is a compression spring, and has one end pressing against the engaging member  330  and the other end pressing against the wheel  310 . When the engaging member  330  is disengaged from the engaging groove  321 , the rotation shaft  320  may be unlocked and separated from the wheel  310 . 
     Further as shown in  FIG. 16 , a pushing portion  332  extends from one side of the engaging member  330 . The pushing portion  332  includes a matching inclined surface  333 . The easy assembling and disassembling wheel component  300  further includes a wheel cover  360 . The wheel cover  360  is arranged in the middle of the wheel  310  and may be slid along the center axis direction of the rotation shaft  320 . The wheel cover  360  includes a driving portion  361 , the driving portion  361  includes a driving inclined surface  362 , and the driving inclined surface  362  is slidably abuts against the matching inclined surface  333 . Pressing the wheel cover  360  along the axis direction of the rotation shaft  320  may make the driving portion  361  to drive the pushing portion  332 , and thereby to drive the engaging member  330  to swing around shaft pin  350 . The arrangement of the wheel cover  360  may not only shield the engaging member  330  to make the appearance of the wheel  310  more beautiful and generous, but also be used as an operating member for operating the engaging member  330 , thereby improving the convenience of operation. The use of the driving inclined surface  362  and the matching inclined surface  333  may allow the wheel cover  360  to drive the engaging member  330  smoothly, and further improve the convenience of operation. 
     As shown in  FIG. 17 , when the wheel  310  needs to be assembled and locked, it is only necessary to press and turn the wheel cover  360 , and then the wheel cover  360  pushes the engaging member  330  to swing, such that the engaging region  331  is separated from the mounting hole  312 . At this time, the rotation shaft  320  may passes through the mounting hole  312 , and the wheel  310  is sleeved on the rotation shaft  320 . After that, the engaging member  330  is released, and the engaging member  330  is rotated and restored under the elastic force of the elastic element  340 . At this time, the engaging region  331  directly faces the mounting hole  312 , and the edge of the engaging region  331  is engaged in the engaging groove  321 . Then, the rotation shaft  320  cannot get out of the mounting hole  312  due to the complete locking of the engaging member  330 , and then the rotation shaft  320  may be connected with and locked to the wheel  310 . 
     As shown in  FIGS. 18-19 , when the wheel  310  needs to be unlocked and disassembled, it is only necessary to press the wheel cover  360 , and then the wheel cover  360  drives the engaging member  330 , such that the engaging member  330  may swing and compress the elastic element  340  and the engaging region  331  is separated from the mounting hole  312 . At this time, the rotation shaft  320  can be disengaged from the engaging member  330  and the mounting hole  312 , and the wheel  310  can be disengaged from the rotation shaft  320 . 
     As shown in  FIGS. 20-22 , the structure according to a fourth embodiment of the present disclosure is shown below. 
     Referring to  FIGS. 20-21 , the easy assembling and disassembling wheel component  400  according to the embodiment is basically the same as the second embodiment in structure, each including a wheel  410 , a rotation shaft  420 , an engaging member  430  and an elastic element  440 . Amounting hole  411  is disposed on a center of the wheel  410 . An annual engaging groove  421  is disposed on one end of the rotation shaft  420 , and the rotation shaft  420  may extend into or get out of the mounting hole  411 . The engaging member  430  is arranged on one side of the wheel  410  and may move along a radial direction of the wheel  410 . The elastic element  440  is a compression spring. The differences lie in that the engaging member  430  includes an elongated hole  431  through which the rotation shaft  420  passes. One end of the elongated hole  431  includes a first engaging region  432 , the other end of the elongated hole  431  includes a second engaging region  433 , and the first engaging region  432  and the second engaging region  433  have different curvatures. Specifically, the edge of the first engaging region  432  is in a circular arc shape, and the diameter of the curved edge of the first engaging region  432  is smaller than the diameter of the rotation shaft  420 . The edge of the second engaging region  433  is in a circular arc shape, and the diameter of the curved edge of the second engaging region  433  is larger than the diameter of the rotation shaft  420 . The edge of the elongated hole  431  between the first engaging region  432  and the second engaging region  433  is arc-shaped. Thus, when the rotation shaft  420  is located at the first engaging region  432 , the rotation shaft  420  can engage with the edge of the first engaging region  432 ; when the rotation shaft  420  is located at the second engaging region  433 , the rotation shaft  420  may directly pass through the second engaging region  433  so as to disengage from the engaging member  430 , for achieving the purpose of locking or unlocking. A pushing portion  434  extends from one side of the engaging member  430 . A through hole  412  is disposed on the side of the hub of the wheel  410  facing the pushing portion  434 . The pushing portion  434  can be pushed from the outside through the through hole  412 , so as to push the engaging member  430  to slide. 
     As shown in  FIG. 21 , when the wheel  410  needs to be assembled and locked, it is only necessary to push the pushing portion  434 , and then the second engaging region  433  directly faces the mounting hole  411 . At this time, the rotation shaft  420  passes through the mounting hole  411  and the second engaging region  433 , and the wheel  410  is sleeved on the rotation shaft  420 . After that, the engaging member  430  is released, the engaging member  430  is restored under the elastic force of the elastic element  440 . At this time, the engaging member  430  slides, the first engaging region  432  directly faces the mounting hole  411 , and the edge of the first engaging region  432  is engaged in the engaging groove  421 . Then, the rotation shaft  420  cannot get out of the mounting hole  411  due to the complete locking of the engaging member  430 , and then the rotation shaft  420  may be connected with and locked to the wheel  410 . 
     In combination with those shown in  FIG. 21 , when the wheel  410  needs to be unlocked and disassembled, it is only necessary to push the pushing portion  434 , and then the second engaging region  433  directly faces the mounting hole  411 . At this time, the rotation shaft  420  may be disengaged from the second engaging region  433  and the mounting hole  411 , and the wheel  410  may be disengaged from the rotation shaft  420 . 
     The present disclosure provides the engaging member  430 , such that the engaging member  430  is movably disposed on the wheel  410 . When the wheel  410  and the rotation shaft  420  are connected with each other, the engaging member  430  may be moved to the engaging groove  421  of the rotation shaft  420 , and is engaged with the engaging groove  421 , fur achieving the purpose of locking the wheel  410  and the rotation shaft  420 ; when the engaging member  430  is moved to disengaged from the engaging groove  421 , the purpose of unlocking the wheel  410  and the rotation shaft  420  is achieved. Thus, the wheel  410  may be quickly assembled and disassembled by only operating the engaging member  430 , which causes a simple structure and can achieve very convenient maintenance and use. 
     As shown in  FIGS. 23-27 , the structure according to a fifth embodiment of the present disclosure is shown below. 
     Referring to  FIGS. 23-26 , the easy assembling and disassembling wheel component  500  according to the embodiment includes a wheel  510 , a rotation shaft  520  and an engaging member  530 . An accommodating chamber  511  is disposed in the middle of the wheel  510 , and a mounting hole  512  is disposed on a center of the accommodating chamber  511 . An annual engaging groove  521  is disposed on one end of the rotation shaft  520 , the rotation shaft  520  may extend into or get out of the mounting hole  512 , and the engaging member  530  is arranged in the accommodating chamber  511  and has an elastic portion  531 . Specifically, the engaging member  530  includes a U-shaped structure, two ends of which form the elastic portions  531 . The elastic portion  531  is elastically locked into the engaging groove  521 , so as to connect and lock the rotation shaft  520  and the wheel  510 . 
     Further referring to  FIGS. 26-27 , a tail end of the elastic portion  531  extends out of a guild portion  532 . The easy assembling and disassembling wheel component  500  further includes an operating member  540 , and the operating member  540  is arranged on one side of the wheel  510  and may slide along a radial direction of the wheel  510 . The operating member  540  includes an oblique hole  541 , and the guild portion  532  is slidably arranged in the oblique hole  541 , so as to drive the elastic portions  531  to open. By providing the guild portion  532 , the operating member  540  can more easily drive the elastic portion  531 , thereby improving the convenience of operation. 
     The easy assembling and disassembling wheel component  500  further includes a wheel cover  550 . The wheel cover  550  is arranged on the accommodating chamber  511  and covers the operating member  540 . By providing the wheel cover  550 , the engaging member  530  is shielded so as to make the appearance of the wheel  510  more beautiful and generous. 
     When the wheel  510  needs to be assembled and locked, it is necessary to press the operating member  540 , so that the operating member  540  slides and pushes the guild portion  532 . The guild portion  532  slides in the direction of the oblique hole  541 , so as to make the elastic portions  531  to open and separate from the mounting hole  512 . At this time, the rotation shaft  520  may pass through the mounting hole  512 , and the wheel  510  is sleeved on the rotation shaft  520 . After that, the operating member  540  is released, and the elastic portion  531  is restored under the elastic force. At this time, the elastic portion  531  is engaged in the engaging groove  521 . The rotation shaft  520  cannot get out of the mounting hole  512  due to the complete locking of the engaging member  530 , and then the rotation shaft  520  may be connected with and locked to the wheel  510 . 
     When the wheel  510  needs to be unlocked and disassembled, it is only necessary to press the operating member  540 , such that the operating member  540  slides and pushes the guild portion  532 . The guild portion  532  is slid in a direction of the oblique hole  541  so as to make the elastic portions  531  to open and separate from the mounting hole  512 . At this time, the rotation shaft  520  may be disengaged from the engaging member  530  and the mounting hole  512 , and then the wheel  510  may be disengaged from the rotation shaft  520 . 
     The present disclosure provides the engaging member  530 , such that an elastic portion  531  is disposed on one end of the engaging member  530 . By using the spring-back property of the elastic portion  531 , when the elastic portion  531  is in a natural state, the elastic portion  531  may spring back and be engaged in the engaging groove  521  of the rotation shaft  520 , so as to connect and lock the rotation shaft  520  and the wheel  510 ; when the elastic portions  531  are opened under force, the elastic portions  531  may get out of the engaging groove  521  of the rotation shaft  520  so as to unlock the rotation shaft  520  and the wheel  510 , for achieving the purpose of unlocking the wheel  510  and the rotation shaft  520 . Thus, the wheel  510  may be quickly assembled and disassembled by only operating the elastic portion  531 , which causes a simple structure and can achieve very convenient maintenance and use. 
     As shown in  FIGS. 28-31 , the structure according to a sixth embodiment of the present disclosure is shown below. 
     Referring to  FIGS. 28-30 , the easy assembling and disassembling wheel component  600  according to the embodiment includes a wheel  610 , a rotation shaft  620 , an engaging member  630  and an elastic element  640 . A center of the wheel  610  and one end of the rotation shaft  620  are fixedly connected. The other end of the rotation shaft  620  includes an engaging groove  621  and may extend into or get out of a mounting hole  611  of a supporting foot  1000  of a frame. The engaging member  630  is movably arranged on the supporting foot  1000 . The elastic element  640  provides an elastic force for engaging the engaging member  630  into the engaging groove  621 , so as to connect and lock the rotation shaft  620  and the supporting foot  1000 . The elastic element  640  is a compression spring, one end of which is pressed against the engaging member  630 , and the other end of which is pressed against the supporting foot  1000 . When the engaging member  630  is disengaged from the engaging groove  621 , the rotation shaft  620  is unlocked and separated from the supporting foot  1000 . 
     Further referring to  FIG. 31 , the engaging member  630  includes an elongated hole  631  through which the rotation shaft  620  passes. One end of the elongated hole  631  includes a first engaging region  632 , the other end thereof includes a second engaging region  633 , and the first engaging region  632  and the second engaging region  633  have different curvatures. Specifically, the diameter of the curved edge of the first engaging region  632  is smaller than the diameter of the rotation shaft  620 , and the diameter of the curved edge of the second engaging region  633  is larger than the diameter of the rotation shaft  620 . Thus, when the rotation shaft  620  is located at the first engaging region  632 , the rotation shaft  620  is engaged with the edge of a first engaging region  632 ; while, when the rotation shaft  620  is located at a second engaging region  633 , the rotation shaft  620  may pass through the second engaging region  633  and be disengaged from the engaging member  630 , for achieving the purpose of locking or unlocking. One end of the engaging member  630  includes a pushing portion  634 , and the bottom of the supporting foot  1000  includes a through hole  1100 . The through hole  1100  directly faces the pushing portion  634 , and the engaging member  630  may be pushed to slide via the through hole  1100 . 
     As shown in  FIG. 30 , when the wheel  610  needs to be assembled and locked, it is only necessary to push the pushing portion  634 , such that the second engaging region  633  directly faces the mounting hole  611 . At this time, the rotation shaft  620  passes through the second engaging region  633  and the mounting hole  611  of the supporting foot  1000 . After that, the engaging member  630  is released, and the engaging member  630  is restored under the elastic force of the elastic element  640 . At this time, the engaging member  630  slides, the first engaging region  632  directly faces the mounting hole  611 , and the edge of the first engaging region  632  is engaged in the engaging groove  621 . Thus, the rotation shaft  620  cannot get out of the mounting hole  611  due to the complete locking of the engaging member  630 , the wheel  610  and the rotation shaft  620  may be connected with and locked to the supporting foot  1000 . 
     As shown in  FIG. 30 , when the wheel  610  needs to be unlocked and disassembled, it is necessary to push the pushing portion  634 , such that the second engaging region  633  directly faces the mounting hole  611 . At this time, the rotation shaft  620  may be disengaged from the second engaging region  633  and the mounting hole  611 , and the wheel  610  and the rotation shaft  620  may be disengaged from the supporting foot  1000 . 
     The present disclosure provides an engaging member  630 , for connecting the wheel  610  and the rotation shaft  620 . The engaging member  630  is movably disposed on the supporting foot  1000 . When the rotation shaft  620  and the supporting foot  1000  are connected, the engaging member  630  may be moved to the engaging groove  621  of the rotation shaft  620 , and be engaged in the engaging groove  621 , for achieving the purpose of locking the wheel  610 . When the engaging member  630  is moved to disengage from the engaging groove  621 , the purpose of unlocking the wheel  610  is achieved. Thus, the wheel  610  may be quickly assembled and disassembled by only operating the engaging member  630 , which causes a simple structure and can achieve very convenient maintenance and use. 
     Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the disclosure. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.