Sliding Structure, Mounting Method and Actuator

A sliding structure includes a first pipe body; a second pipe body slidably provided inside the first pipe body; a first sliding part; and a second sliding part. Before assembly, the first sliding part is clamped on the second pipe body directly or indirectly through the second sliding part, with a part of the first sliding part extending beyond the second pipe body. When assembled, the first sliding part is detached from the second pipe body, wherein one side of the first sliding part is clamped on the inner wall of the first pipe body and the other side is slidable connected to the outer wall of the second pipe body. One side of the second sliding part is clamped on the outer wall of the second pipe body and the other side is slidable connected to the inner wall of the first pipe body.

TECHNICAL FIELD

The present disclosure relates to the technical field of sliding structures, particularly to a sliding structure, a mounting method, and an actuator.

BACKGROUND

Actuators are widely used in furniture or electrical appliances with adjustable positions, such as beds, chairs, and tables. The main function of actuators is to drive the target object to adjust its position, and its movement is intuitively represented as the linear reciprocating movement on the part of retractable pipe fittings. Sliding structures such as sliders, sliding blades, and sliding sleeves are usually disposed between the relatively moving pipe fittings to support components, reduce friction and eliminate clearance. In order to mount the sliding part on the inner wall or outer wall of the pipe fittings, a hole is usually processed on the side wall of the pipe fittings, and part of the sliding part is embedded in the hole.

For example, the Chinese patent with publication number CN104863937B discloses a casing assembly structure and a lifting column. The casing assembly includes two external casings that can be relatively retractable. A slider is disposed between the two casings, and a groove without penetrating the outer wall is disposed on the inner side wall of the outer pipe to avoid the presence of holes on the exposed pipe wall and affect aesthetics. However, in order to fit the corresponding slider into the groove on the inner wall of the outer pipe, the inner pipe is equipped with a hole groove structure to dodge the slider. These technological holes and grooves, which are made merely to facilitate the mounting, actually increase the processing cost, and to a certain extent, cause local stress changes, resulting in the deformation of pipe fittings, affecting the precision and smoothness of retractable movement of pipe fittings, and leading to the reduction of the rate of finished products. On the other hand, in order to facilitate mass production and reduce stress and deformation caused by processing, a preferred processing method is laser cutting, which is relatively efficient but expensive. At present, it is very difficult to mount the sliding part in the gap between two pipe fittings under the premise of avoiding too many holes in the pipe body.

SUMMARY

The present disclosure aims at solving at least one of the technical problems existing in the prior art.

Accordingly, the present disclosure proposes a sliding structure, a mounting method, and an actuator, wherein the sliding structure has the advantages of removing the technological grooves which are disposed on the inner and outer pipe walls to assist mounting, firmly clamping the sliding part on the relatively retractable pipe fittings to prevent the sliding part from easily coming out or being pulled out, and at the same time improving the mounting speed and convenience.

The sliding structure according to some embodiments of the present disclosure contains a first pipe body; a second pipe body slidable disposed inside the first pipe body; a first sliding part; and a second sliding part. In some embodiments, one side of the second sliding part is clamped on the outer wall of the second pipe body, and the other side of the second sliding part is slidable connected to the inner wall of the first pipe body. In some embodiments, a part of the first sliding part extends beyond the end of the second pipe body when not mounted, and the first sliding part is directly clamped on the second pipe body or indirectly clamped on the second pipe body by the second sliding part. In some embodiments, when mounted, the first sliding part is detached from the end of the second pipe body, one side of the first sliding part is clamped on the inner wall of the first pipe body, and the other side of the first sliding part is slidable connected to the outer wall of the second pipe body.

The present disclosure has the beneficial effects that the pocket holes required for mounting the first sliding part are reduced in quantity, which reduces the production cost, improves the service strength of the pipe wall, and avoid the deformation of the pipe wall. In addition, by directly or indirectly clamping the first sliding part on the second pipe body, part of the first sliding part extends beyond the end of the second pipe body and no additional positioning tool is required to fix the first sliding part, thus reducing the cost and improving the assembly efficiency.

In some embodiments, the first sliding part includes a connecting part, which is disposed between the second pipe body and the first pipe body; a flange edge, which is disposed at one end of the connecting part, and abuts against the end face of the first pipe body; and a plurality of first sliders, which are arranged between the second pipe body and the first pipe body and are connected to the other end of the connecting part.

In some embodiments, one end of the outer wall of the second pipe body is equipped with a plurality of second slotted holes, and the second sliding part contains a second boss which is clamped in the second slotted holes. In some embodiments, the second sliding part further include a second slider, which is connected to the second boss and is slidable connected to the first pipe body.

In some embodiments, when not mounted, the first slider is directly clamped on the second pipe body; the first sliding part is inclined towards the inner side of the second pipe body, and the first slider extends beyond the end of the second pipe body, so that the first sliding part is clamped on the end of the second pipe body.

In some embodiments, a clamping part is disposed between the first slider and the connecting part to face the second pipe body. When the first sliding part is not mounted, the clamping part is clamped against the end of the second pipe body.

In some embodiments, the clamping part is a transition surface, one end of which is connected to the first slider, and the other end of which is connected to the connecting part.

In some embodiments, when not mounted, the first sliding part is indirectly clamped on the second pipe body, the first sliding part is clamped with the second sliding part, and the first sliding part extends beyond the end of the second pipe body.

In some embodiments, the second sliding part is equipped with clamping teeth, the first sliding part is equipped with a bayonet matching the clamping teeth, and when the first slider is not mounted, the clamping teeth are clamped with the bayonet.

In some embodiments, the bayonet includes a stop wall and an escape wall, which are connected to each other, the stop wall is located at the side of the bayonet close to the flange edge, an acute angle is formed between the stop wall and the escape wall, and the clamping teeth are rod-shaped protrusion inclined towards the bayonet. When the first sliding part is not mounted, the bottom surface of the rod-shaped projection abuts against the stop wall, and the side surface of the rod-shaped projection abuts against the escape wall.

In some embodiments, a sliding gap exists between the second pipe body and the first pipe body, the thickness of the connecting part is less than the width of the sliding gap, and the thickness of the first sliding part is more than or equal to the width of the sliding gap.

In some embodiments, a sliding gap exists between the second pipe body and the first pipe body, interference fit is realized between the first slider and the sliding gap, and clearance fit is realized between the connecting part and the second pipe body.

In some embodiments, a first boss is disposed on the side of the first slider facing the first pipe body, and a plurality of first slotted holes for accommodating the first bosses are disposed on the end of the inner wall of the first pipe body.

In some embodiments, when the first sliding part is not mounted, a gap exists between the first boss and the inner wall opposite the first pipe body.

In some embodiments, the first slotted hole does not penetrate the inner wall of the first pipe body.

In some embodiments, the side of the first slotted hole far away from the flange edge forms a chamfered surface, and the side of the first slotted hole close to the flange edge abuts against the first boss.

In some embodiments, the side of the first boss far away from the flange edge has a guide slope, and the guide slope is used for guiding the first pipe body when the first sliding part is not mounted.

In some embodiments, a plurality of the first sliders is arranged along the circumferential direction of the second pipe body.

In some embodiments, a plurality of the second sliders is arranged along the circumferential direction of the second pipe body.

In some embodiments, the first sliding part is an annular structure, an unclosed C-shaped annular structure, or is formed by splicing two opposite half rings.

The present disclosure further describes a mounting method of the above-mentioned sliding structures. In some embodiments, a mounting method according to the above sliding structure includes the following steps: step1, vertically place a second pipe body on an operating platform, so that the end of the second pipe body equipped with a second slotted hole faces upwards; step2, apply the first sliding part on the second pipe body from top to bottom, so that the clamping part abuts against the upper end of the second pipe body, and meanwhile the first sliding part is inclined towards the inside of the second pipe body, so that the first sliding part is clamped on the end of the second pipe body; step3, place the second sliding part inside the second slotted hole; and step4: apply the first pipe body on the outer surface of the first slider from top to bottom, and the lower end of the first pipe body abuts against the flange edge during the downward movement of the first pipe body and drives the first sliding part to move downwards, so that the first sliding part enters the gap between the first pipe body and the second pipe body, and meanwhile the first boss snaps into the first slotted hole.

In some embodiments, a mounting method of the sliding structure contains the following steps: step1, apply the first sliding part on the second pipe body, and fix the second sliding part on the second pipe body; step2, move the first sliding part until the first sliding part is engaged with the second sliding part, so that the first sliding part is fixed on the second pipe body; step3, apply the first pipe body on the outer surface of the first sliding part, and the first pipe body presses the first sliding part to bend and deform towards the inside of the second pipe body, so that the first pipe body can be applied on the first sliding part conveniently; step4: push the first pipe body to the second pipe body. When the end of the first pipe body abuts against the flange edge, one side of the first sliding part is clamped on the inner wall of the first pipe body. Then, the first pipe body drives the first sliding to depart from the second sliding part, so that the first sliding part and the second sliding part detach from each other.

The present disclosure further describes an actuator including the above-mentioned sliding structures. In some embodiments, an actuator includes a sliding structure as described above; a box body, where a driving part is disposed inside and which is fixedly connected to one end of the sliding structure; a screw rod assembly, arranged in the sliding structure and containing a hollow transmission rod, a screw rod and a nut. In some embodiments, one end of the hollow transmission rod is connected to the rotating end of the driving part; the other end of the hollow transmission rod is fixedly connected to a nut; the screw rod is disposed inside the hollow transmission rod; the outer peripheral surface of the screw rod is engaged with the nut through threads; the end of the screw rod far from the box body is connected to the other end of the sliding structure; and the driving part drives the sliding structure to do retractable motion by the screw rod assembly.

In some embodiments, the end of the screw rod far away from the box body is directly connected to a bottom plate, the outer peripheral surface of the bottom plate is fixedly connected to the inner wall of the second pipe body, and the box body is fixedly connected to the first pipe body.

In some embodiments, the end of the screw rod far away from the box body is directly connected to a bottom plate, the outer peripheral surface of the bottom plate is fixedly connected to the inner wall of the first pipe body, and the box body is fixedly connected to the second pipe body.

In some embodiments, the sliding structure further contains a third pipe body which is slidable applied outside the first pipe body, and the structure between the third pipe body and the first pipe body is the same as that between the first pipe body and the second pipe body. Other features and advantages of the present disclosure will be set forth in the specification that follows, and in part will be obvious from the specification, or may be learned by practice of the present disclosure. The objects and other advantages of the present disclosure are realized and obtained by the structure particularly pointed out in the specification, claims, and drawings.

In order to make the above objects, features, and advantages of the present disclosure more obvious and understandable, the following preferred embodiments will be described in detail with reference to the attached drawings.

DETAILED DESCRIPTION

For the embodiments of the present disclosure described in detail below, examples are shown in the accompanying drawings, in which the same or similar reference numerals throughout refer to the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, only for explaining the present disclosure, and should not be construed as limiting the present disclosure.

In the description of the present disclosure, it should be understood that, terms such as center, longitudinal, transverse, length, width, thickness, above, below; front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, anticlockwise, axial, radial, and circumferential are only for the convenience of describing the present disclosure and simplifying the description, and it is not intended to indicate or imply that the referred devices or elements must have a specific orientation, or be constructed and operated in a specific orientation, therefore should not be construed as limiting the present disclosure. In addition, the features defined with “first” and “second” may include one or more of these features explicitly or implicitly. In the description of the present disclosure, “a plurality” means two or more, unless otherwise stated.

In the description of the present disclosure, it should be noted that unless otherwise specified and limited, the terms “mounted” and “connected” should be understood in a broad sense. For example, they can be fixedly connected, dismountable connected, or integrally connected: they can be mechanically connected or electrically connected: they can be directly connected or indirectly connected through an intermediate medium, or internally connected. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

The sliding structure, the mounting method, and the actuator of the embodiment of the present disclosure are described in detail below with reference to the drawings.

As shown inFIGS.1through9,18, and19, the present disclosure discloses a sliding structure, which comprises a first pipe body5, a second pipe body4, a second sliding part7and a first sliding part6, wherein the second pipe body4is slidably arranged in the first pipe body5. In some embodiments, one side of the second sliding part7is clamped on the outer wall of the second pipe body4, and the other side of the second sliding part7is slidably connected with the inner wall of the first pipe body5. When the first sliding part6is not mounted, part of the first sliding part6extends beyond the end of the second pipe body4, and the first sliding part6is directly clamped on the second pipe body4. When the first sliding part6is mounted, the first sliding part6is detached from the end of the second pipe body4. In some embodiments, one side of the first sliding part6is clamped on the inner wall of the first pipe body5, and the other side of the first sliding part6is slidable connected with the outer wall of the second pipe body4.

In other words, the first pipe body5is slidable applied on the second pipe body4, and the first sliding part6and the second sliding part7are arranged between the first pipe body5and the second pipe body4, so that the contact-free sliding between the first pipe body5and the second pipe body4can be achieved. The first sliding part6and the first pipe body5are relatively fixed, and the second sliding part7and the second pipe body4are relatively fixed. When the first pipe body5and the second pipe body4are extended, the distance between the first sliding part6and the second sliding part7becomes shorter. When the first pipe body5and the second pipe body4contract, the distance between the first sliding part6and the second sliding part7becomes longer. The cross sections of the first pipe body5and the second pipe body4are rectangular shapes, or other shapes, such as round, square, and oval shapes.

According to the present disclosure, the pocket holes required for mounting the first sliding part6are reduced in quantity: which reduces the production cost, improves the service strength of the pipe wall, and avoids the deformation of the pipe wall. When mounting the first sliding part6, by directly clamping the first sliding part6on the second pipe body4, part of the first sliding part6extends beyond the end of the second pipe body4, and no additional positioning tool is needed to fix the first sliding part6. At the same time, by using the space outside the end of the second pipe body4, part of the first sliding part6is inclined inwards (it can be directly formed or inclined inward by external force), so that an outer circumference of the extending part of the first sliding part6is smaller than an inner circumference of the first pipe body5, thus the first sliding part6can be smoothly mounted in the first pipe body5, reducing the processing and assembly costs and improving the assembly efficiency.

As shown inFIGS.3through8, the first sliding part6includes a connecting part65, a flange edge61, and a plurality of first sliders62. In some embodiments, the connecting part65is disposed between the second pipe body4and the first pipe body5. The flange edge61is disposed at one end of the connecting part65, and abuts against the end face of the first pipe body5. A plurality of first sliders62are connected to the other end of the connecting part65. That is, the flange edge61and the first slider62are connected by the connecting part65, the first slider62is located between the second pipe body4and the first pipe body5for sliding guidance, the flange edge61is located at the end of the first pipe body5, and the plane of the flange61is perpendicular to the axis of the first pipe body5, which is convenient for the first pipe body5to push the flange61, thus driving the move of the first sliding part6.

In some embodiments, when the first sliding part6is directly clamped on the second pipe body4, the first slider62is inclined towards the inside of the second pipe body4, and the first slider62extends beyond the end of the second pipe body4, so that the first sliding part6is clamped on the end of the second pipe body4. In other words, when the first sliding part6is in a natural state, the first slider62is inclined inwards, and when the first slider6is mounted on the second pipe body4, the connecting part65is applied on the second pipe body4, and the inner circumference of the first slider62formed after the inclination is less than the outer circumference of the second pipe body4, so that the first slider62extends beyond the end of the second pipe body4, and then the first sliding part6is clamped on the end of the second pipe body4.

In some embodiments, a clamping part64ais disposed between the first slider62and the connecting part65, and the clamping part64afaces the second pipe body4. When the first sliding part6is not mounted, the clamping part64aabuts against the end of the second pipe body4. In some embodiments, the clamping part64ais a transition surface, one end of which is connected to the first slider62, and the other end of which is connected to the connecting part65. That is, the clamping part64acan be any structure that can be clamped on the end of the second pipe body4, preferably a transition surface, and the transition surface can be a curved surface or an inclined surface, thus facilitating the first slider62to enter the sliding gap.

As shown inFIGS.2through4,6, and9), one end of the outer wall of the second pipe body4is provided with a plurality of second slotted holes8, the second sliding part7contains a second boss72and a second slider71, and the second boss72is clamped in the second slotted holes8. The second slider71is connected to the second boss72, and the second slider71is slidable connected to the first pipe body5. By the snap-fit between the second boss72and the second slotted hole8, the second sliding part7can be conveniently mounted on the second pipe body4.

In some embodiments, a plurality of first sliders62are arranged in the circumferential direction of the second pipe body4, and a plurality of second sliders71are arranged in the circumferential direction of the second pipe body4. That is, the first slider62and the second slider71are arranged around the second pipe body4at the same time to ensure that the gap between the second pipe body4and the first pipe body5in the circumferential direction is uniform during sliding, so that the sliding process is smoother.

According to an embodiment of the present disclosure, a sliding gap exists between the second pipe body4and the first pipe body5, the thickness of the connecting part65is less than the sliding gap, and the thickness of the first slider62is more than or equal to the sliding gap. In some embodiments, interference fit is realized between the first slider62and the sliding gap, and clearance fit is realized between the connecting part65and the second pipe body4. In other words, the second pipe body4and the first pipe body5are slidable connected by the first slider62and the second slider71, and the thickness of the first slider62and that of the second slider71are more than or equal to the sliding gap between the second pipe body4and the first pipe body5. In some embodiments, the thickness of the first slider62and the second slider71is slightly more than the sliding gap, so that interference fit can be realized between the first slider62and the second slider71with the sliding gap during sliding, thus the second pipe body4and the first pipe body5do not shake when sliding. The thickness of the connecting part65is less than the sliding gap, and a gap exists between the connecting part65and the second pipe body4, so the connecting part65is thinner, and a movable space exists between the connecting part65and the second pipe body4. On the one hand, it is convenient for the first sliding part6to be easily applied on the second pipe body4. On the other hand, when the first sliding part6is mounted, the connecting part65can be deformed. Because of the small thickness of the connecting part65and the movable space between the first pipe body5and the second pipe body4, the connecting part65is easily deformed inwards to dodge the first pipe body5during mounting, thus facilitating the first pipe body5to be applied on the second pipe body4.

In some embodiments, the first slider62is equipped with a first boss63on the side facing the first pipe body5, and one end of the inner wall of the first pipe body5is provided with a plurality of first slotted holes10for accommodating the first bosses63. In some embodiments, the side of the first slotted hole10far away from the flange edge61forms a chamfered surface11, and the side of the first slotted hole10close to the flange edge61abuts against the first boss63. In other words, the flange edge61abuts against the first pipe body5, thus forming the first limit point, and the first boss63is clamped in the first slotted hole10, thus forming the second limit point. As the first sliding part6passes through the upper limit point and the lower limit point in the sliding gap, the first sliding part6is always fixed at the end of the first pipe body5during sliding, thus preventing the first sliding part6from naturally falling off or being pulled out from the second pipe body after working for a long time.

In some embodiments, when the first sliding part6is not mounted, a gap exists between the first boss63and the inner wall opposite the first pipe body5. That is, when the first slider62is inclined towards the inside of the second pipe body4, the first boss63is inclined towards the inside of the second pipe body4, so that a certain distance exists between the inner wall of the first pipe body5and the first boss63during mounting, which makes it easier for the first pipe body5to be applied on the first sliding part6.

According to one embodiment of the present disclosure, the first slotted hole10does not penetrate the inner wall of the first pipe body5, and after the mounting, the exposed surface of the first pipe body5remains intact, which improves the aesthetic feeling of use.

According to one embodiment of the present disclosure, the first sliding part6is an annular structure, an unclosed C-shaped annular structure, or is formed by splicing two opposite half rings. The first sliding part6can be designed according to the actual needs, so as to improve the adaptability. It is suitable to use wear-resistant plastic to make the first sliding part6and the second sliding part7, which can be directly injection molded.

According to one embodiment of the present disclosure, the side of the first slotted hole10far away from the flange edge61forms a chamfered surface11, and the side of the first slotted hole10close to the flange edge61abuts against the first boss63. In this way, even if the first slotted hole10extends widthwise to the area of the second sliding part7, the chamfered surface11will not scratch the surface of the second slider71during assembly.

As shown inFIGS.3through7, the present disclosure also provides a mounting method according to the sliding structure, which comprises the following steps: step1, vertically place the second pipe body4on the operating platform, so that the end of the second pipe body4with the second slotted hole8faces upwards: step2: apply the first sliding part6on the second pipe body4from top to bottom, so that the clamping part64aabuts against the upper end of the second pipe body4, and the first slider62is inclined towards the inside of the second pipe body4, so that the first sliding part6is clamped on the end of the second pipe body4: step3, place the second sliding part7in the second slotted hole8: step4: apply the first pipe body5on the outer surface of the first sliding part6from top to bottom. During the downward movement of the first pipe body5, the lower end of the first pipe body5abuts against the flange edge61, and the first sliding part6is driven to move downwards, so that the first slider62enters the gap between the first pipe body5and the second pipe body4, and meanwhile the first boss63snaps into the first slotted hole10. That is, the second sliding part7is mounted and positioned by using the second slotted hole8, the first sliding part6makes use of its elastic deformability, and the clamping part64aabuts against the upper end of the second pipe body4, while the first slider62is inclined inwards, so that there will be no interference when mounting the first pipe body5. During the downward mounting of the first pipe body5, the first sliding part6achieves self-positioning, and the lower end of the first pipe body5abuts against the flange edge61, and then directly moves downwards, so that the first slider62automatically aligns and enters the gap between the first pipe body5and the second pipe body4, and the mounting process is convenient and quick.

As shown inFIGS.10through19, the present disclosure discloses a sliding structure, which comprises a first pipe body5, a second pipe body4, a second sliding part7and a first sliding part6, where the second pipe body4is slidable disposed in the first pipe body5. One side of the second sliding part7is clamped on the outer wall of the second pipe body4, and the other side of the second sliding part7is slidable connected to the inner wall opposite the first pipe body5. When the first sliding part6is not mounted, part of the first sliding part6extends beyond the end of the second pipe body4, and the first sliding part6is indirectly clamped on the second pipe body4by the second sliding part7. When the first sliding part6is mounted, the first sliding part6is detached from the end of the second pipe body4, one side of the first sliding part6is clamped on the inner wall of the first pipe body5, and the other side of the first sliding part6is slidable connected to the outer wall of the second pipe body4.

In other words, the first pipe body5is slidable applied on the second pipe body4, and the first sliding part6and the second sliding part7are arranged between the first pipe body5and the second pipe body4, so that the contact-free sliding between the first pipe body5and the second pipe body4can be achieved. The first sliding part6and the first pipe body5are relatively fixed, and the second sliding part7and the second pipe body4are relatively fixed. When the first pipe body5and the second pipe body4are extended, the distance between the first sliding part6and the second sliding part7becomes shorter. When the first pipe body5and the second pipe body4contract, the distance between the first sliding part6and the second sliding part7becomes longer. The cross sections of the first pipe body5and the second pipe body4are rectangular shapes, or other shapes, such as round, square, and oval shapes.

According to the present disclosure, the pocket holes required for mounting the first sliding part6are reduced in quantity: which reduces the production cost, improves the service strength of the pipe wall, and avoids the deformation of the pipe wall. When the first sliding part6is mounted, the first sliding part6is indirectly clamped on the second pipe body4through the second sliding part7, and part of the first sliding part6extends beyond the end of the second pipe body4, so no additional positioning tool is needed to fix the first sliding part6. At the same time, the inner space outside the end of the second pipe body4is used to make part of the first sliding part6be inclined inwards (it can be directly formed or inclined inward by external force), an outer circumference of the extending part of the first sliding part6is smaller than an inner circumference of the first pipe body5, thus the first sliding part6can be smoothly mounted in the first pipe body5, reducing the processing and assembly costs and improving the assembly efficiency.

As shown inFIGS.11through17, the first sliding part6includes a connecting part65, a flange edge61, and a plurality of first sliders62. In some embodiments, the connecting part65is disposed between the second pipe body4and the first pipe body5. The flange edge61is disposed at one end of the connecting part65, and abuts against the end face of the first pipe body5. A plurality of first sliders62are connected to the other end of the connecting part65. That is, the flange edge61and the first slider62are connected by the connecting part65, the first slider62is located between the second pipe body4and the first pipe body5for sliding guidance, the flange edge61is located at the end of the first pipe body5, and the plane of the flange edge61is perpendicular to the axis of the first pipe body5, which is convenient for the first pipe body5to push the flange61, thus driving the first sliding part6to move.

As shown inFIGS.10and12through16, one end of the outer wall of the second pipe body4is provided with a plurality of second slotted holes8, the second sliding part7contains a second boss72and a second sliding part71, and the second boss72is clamped in the second slotted holes8. The second slider71is connected to the second boss72, and the second slider71is slidable connected to the first pipe body5. By the snap-fit between the second boss72and the second slotted hole8, the second sliding part7can be conveniently mounted on the second pipe body4.

In some embodiments, when the first sliding part6is indirectly clamped on the second pipe body4, the connecting part65is engaged with the second sliding part7, and the first slider62extends beyond the end of the second pipe body4. In other words, since the second sliding part7is clamped with the second slotted hole8by the second boss72, the connecting part65of the first sliding part6is engaged with the second sliding part7, and the first slider62is disposed outside the end of the second pipe body4, so that the first slider62can dodge inwards when the first pipe body5is being mounted.

In some embodiments, the second sliding part7is equipped with clamping teeth73, and the connecting part65is equipped with bayonets64matching the clamping teeth73. When the first sliding part6is not mounted, the clamping teeth73are engaged with the bayonets64. Alternatively, the bayonets64can be arranged on one side of the second slider71, and the clamping teeth73can be arranged on the connecting part65. After the positions of the bayonets64and the clamping teeth73are interchanged, the engagement during assembly can still be realized.

In some embodiments, the cross section of each bayonet64is an L-shaped structure, and the bayonet64comprises a stop wall and an escape wall, which are connected to form the L-shaped structure. The stop wall is located at the side of the bayonet64close to the flange edge61, an acute angle is formed between the stop wall and the escape wall, each of the clamping teeth73is a rod-shaped protrusion inclined to the bayonet64. When the first sliding part6is not mounted, the bottom surface of the rod-shaped protrusion abuts against the stop wall, and the side surface of the rod-shaped protrusion abuts against the escape wall. That is, the bayonet64is equipped with a stop wall and an escape wall, and each of the clamping teeth73is an inclined rod-shaped protrusion. When the bottom surface of the rod-shaped protrusion abuts the stop wall, it can stop the first sliding part6from moving along the axial direction of the second pipe body4. When the escape wall abuts against the side surface of the rod-shaped protrusion, the two abutting surfaces are inclined planes and form an acute angle with the axial direction of the second pipe body4. In this way, when the first sliding part6is away from the second sliding part7along the axial direction of the second pipe body4, the clamping teeth73can slide out of the bayonets64along the escape wall or the side surface of the rod-shaped protrusion, which makes the first sliding part6easily be detached from the second sliding part7.

In some embodiments, a plurality of first sliders62are arranged along the circumferential direction of the second pipe body4, and a plurality of second sliders71are arranged along the circumferential direction of the second pipe body4. That is, the first slider62and the second slider71are arranged around the second pipe body4at the same time to ensure that the gap between the second pipe body4and the first pipe body5in the circumferential direction is uniform during sliding, so that the sliding process is smoother.

According to an embodiment of the present disclosure, a sliding gap exists between the second pipe body4and the first pipe body5, the thickness of the connecting part65is less than the sliding gap, and the thickness of the first slider62is more than or equal to the sliding gap. In some embodiments, interference fit can be realized between the first slider62and the sliding gap, and clearance fit can be realized between the connecting part65and the second pipe body4. In other words, the second pipe body4and the first pipe body5are slidable connected by the first slider62and the second slider71, and the thickness of the first slider62and that of the second slider71are more than or equal to the sliding gap between the second pipe body4and the first pipe body5. In some embodiments, the thickness of the first slider62and the second slider71is slightly more than the sliding gap, so that interference fit can be realized between the first slider62and the second slider71with the sliding gap during sliding, thus the second pipe body4and the first pipe body5do not shake when sliding. The thickness of the connecting part65is less than the sliding gap, and a gap exists between the connecting part65and the second pipe body4, so the connecting part65is thinner, and a movable space exists between the connecting part65and the second pipe body4. On the one hand, this arrangement can facilitate the first sliding part6to be easily applied on the second pipe body4. On the other hand, when the first sliding part6is mounted, the connecting part65can be deformed. Because of its small thickness of the connecting part65and the movable space between the connecting part65and the second pipe body4, when the first pipe body5is mounted, the connecting part65is easily deformed inwards to dodge the first pipe body5during mounting, thus facilitating the first pipe body5to be applied on the second pipe body4.

In some embodiments, the first slider62is provided with a first boss63on the side facing the first pipe body5, and the end of the inner wall of the first pipe body5is provided with a plurality of first slotted holes10for accommodating the first bosses63. In some embodiments, the side of the first slotted hole10far away from the flange edge61forms a chamfered surface11, and the side of the first slotted hole10close to the flange edge61abuts against the first boss63. In other words, the flange edge61abuts against the first pipe body5, thus forming the first limit point, and the first boss63is clamped in the first slotted hole10, thus forming the second limit point. As the first sliding part6passes through the upper limit point and the lower limit point in the sliding gap, the first sliding part6is always fixed on the end of the first pipe body5during sliding, thus preventing the first sliding part6from naturally falling off or being pulled out from the second pipe body after working for a long time.

In some embodiments, the side of the first boss63away from the flange61has a guide slope, which is used to guide the first pipe body5when the first sliding part6is not mounted. That is, when the first pipe body5is applied, the first boss63partially coincide with the first pipe body5in the sliding direction, and the guide slope is disposed to facilitate the end of the first pipe body5to be applied on the first sliding part6along the guide slope, thus improving the mounting convenience.

In some embodiments, when the first sliding part6is not mounted, the first slider62can be inclined to the inner space extending from the end of the second pipe body4by direct shaping or external force, so that a gap exists between the first boss63and the inner wall opposite the first pipe body5. That is, when the first slider62is inclined towards the inside of the second pipe body4, the first boss63is inclined to the inside of the second pipe body4, so that a certain distance exists between the inner wall opposite the first pipe body5and the first boss63during mounting, which makes it easier for the first pipe body5to be applied on the first sliding part6. For the scheme of directly shaping the first slider62to be inclined inwards, please refer to Embodiment 1. It is worth noting that the method of tilting the first slider62to the side by external force can be directly pressed manually; or the first slider62can be pressed inwards by using a small tool, so that the first slider62can keep the inward tilting/slow recovery state in a short period of time (for example, tens of seconds to minutes). This can be achieved by selecting plastic materials or structural design with slow recovery features, which will not go into details here.

According to an embodiment of the present disclosure, the first slotted hole10does not penetrate the inner wall of the first pipe body5, and after the mounting, the exposed surface of the first pipe body5remains intact, which improves the aesthetic feeling.

According to an embodiment of the present disclosure, the first sliding part6has a ring structure, or an unclosed C-shaped ring structure, or is formed by splicing two opposite half rings. The first sliding part6can be designed according to the actual needs, so as to improve the adaptability. It is suitable to use wear-resistant plastic to make the first sliding part6and the second sliding part7, which can be directly injection molded.

According to an embodiment of the present disclosure, the side of the first slotted hole10far away from the flange edge61forms a chamfered surface11, and the side of the first slotted hole10close to the flange edge61abuts against the first boss63. In this way, even if the first slotted hole10extends widthwise to the area of the second sliding part7, the chamfered surface11will not scratch the surface of the second slider71during assembly.

As shown inFIGS.12through17, the present disclosure also provides an assembly method according to the above sliding structure, which contains the following steps: step1, apply the first sliding part6on the second pipe body4, and fix the second boss72on the second sliding part7in the second slotted hole8: step2: move the first sliding part6until the clamping teeth73are engaged with the bayonet64, so that the first sliding part6is fixed on the second pipe body4: step3: apply the first pipe body5on the outer surface of the first sliding part6, and the first pipe body5is guided by the guide slope of the first boss63, which presses the first boss63and the first slider62to bend and deform towards the inside of the second pipe body4, so that the first pipe body5can be applied on the first sliding part6: step4: push the first pipe body5to the second pipe body4. When the end of the first pipe body5abuts against the flange edge61, one side of the first sliding part63snaps into the inner wall of the first pipe body10, and then the first pipe body5drives the first sliding part to depart from the second sliding part7, so that the first bayonet64and the second clamping teeth73detach from each other.

As shown inFIGS.1and2, the present disclosure also provides an actuator, which comprises the sliding structure as described above: a box body2, inside which the driving part1is disposed, the box body2being fixedly connected with one end of the sliding structure: a screw rod assembly3, which is arranged in the sliding structure. The screw rod assembly3contains a hollow transmission rod31, a screw rod32, and a nut33. One end of the hollow transmission rod31is coaxially connected to the rotating end of the driving part1, and the other end of the hollow transmission rod31is fixedly connected with the nut33. The screw rod32is disposed inside the hollow transmission rod31, and the outer peripheral surface of the screw rod32is engaged with the nut33by threads. In some embodiments, the end of the screw rod32far away from the box body2is connected to the other end of the sliding structure, and the driving part1drives the sliding structure to do retractable motion by the screw rod assembly3.

In some embodiments, as shown inFIG.20, the end of the screw rod32far from the box body2is directly connected to the bottom plate9, the outer peripheral surface of the bottom plate9is fixedly connected to the inner wall of the second pipe body4, and the box body2is fixedly connected to the first pipe body5, preferably by welding. Alternatively, as shown inFIG.1, the end of the screw rod32far from the box body2is directly connected to the bottom plate9, the outer peripheral surface of the bottom plate9is fixedly connected to the inner wall of the first pipe body5, preferably by welding, and the box body2is fixedly connected to the second pipe body4.

As a variant of Embodiment 3, the screw rod assembly3of the actuator shown inFIGS.1and2can be mounted upside down. That is, one end of the screw rod32is coaxially connected to the rotating end of the driving part1, one end of the hollow transmission rod31is fixed to the base plate9, and the nut33fixed on the hollow transmission rod31is engaged with the screw rod32by threads. When working, the screw rod32is driven to rotate, and the hollow transmission rod31and the nut33linearly expands or contracts along the axis of the screw rod32without rotating.

In some embodiments, as shown inFIG.21, the sliding structure further contains a third pipe body12which is slidable applied outside the first pipe body5, and the structure between the third pipe body12and the first pipe body5is the same as that between the first pipe body5and the second pipe body4.

That is, the driving part1provides rotational power, and the screw rod assembly3converts the rotational power into linear retractable power. The sliding structure of this application can be that the first pipe body5is connected with the box body2, or the second pipe body4is connected with the box body2. The first pipe body5and the second pipe body4are driven by the screw rod assembly3to generate relative sliding. At the same time, the sliding structure is not limited to the sliding between the two pipes, but also can include the third pipe body12or more pipe bodies to form a multi-stage sliding structure, thus increasing the application range. The actuator can be widely used in lifting furniture, providing stable and reliable lifting function.

In the description of this specification, terms “an embodiment,” “some embodiments,” “illustrative embodiments,” “examples,” “specific examples,” or “some examples” mean that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present disclosure have been shown and described, those skilled in the art can understand that many changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.