Patent Publication Number: US-2023141063-A1

Title: Fusion welding device

Description:
FIELD OF THE INVENTION 
     The present invention relates to a fusion welding device, in particular to a fusion welding device of a packing belt of a hand-held baler. 
     BACKGROUND OF THE INVENTION 
     There is a way of bonding the belts, for example, using PET or PP strapping tape to bundle products or packages in a handheld electric baler, and then tightening and bonding the tape, which is to bond the two parts that need to be bonded through the way of frictional heating. For a hand-held baler, it is always intended to complete a serried of actions through the automatic operation of the machine with few operations, and the structure of the machine is preferably as simple as possible, rationally arranged, light and beautiful. 
     SUMMARY OF THE INVENTION 
     The technical problem to be solved by the present invention is to provide a fusion welding device, which can be applied to a hand-held baler to weld the baling belt, and is simple in operation and structure. In order to achieve the object, the present invention adopts the following technical solutions:
     A fusion welding device, comprising an operating component, a fusion welding work motor, a fusion welding work moving assembly, and a fusion welding work fixed assembly, the fusion welding work motor being connected with the fusion welding work moving assembly by means of a transmission mechanism; the fusion welding device is provided with a central connection component that is able to rotate, and the central connection component is provided with a first input position, a second input position, and a locking structure connection position;   The first input position, on the basis of an operation on the operating component, causes the central connection component to produce a rotation in a first direction;   The second input position is transmissively connected to a clutch of the fusion welding work motor, and the fusion welding work motor is able to drive, by means of an output component, the second input position to produce a rotation in a second direction, and thereby drive the central connection component to rotate in the second direction, and after rotating to a set angle, the two disengage, said set angle corresponding to the angle of rotation required for the fusion welding work moving assembly to move to a fusion welding working location.   

     Further, the second input position is a sector gear, and the output component is a gear. 
     Further, the fusion welding device is provided with a fusion welding working state locking structure of a fusion welding work moving assembly, the locking structure is arranged obliquely, and the upper end thereof is rotatably connected to the locking structure locking structure connection position, the axis of rotation is parallel to the axis of rotation of the central connection component, and the lower end thereof is connected with the fusion welding work moving assembly; the fusion welding device is provided with a limiting structure to limit the maximum rotation angle of the central connection component in the second direction; the fusion welding device is configured such that the locking structure is in a locked state when the fusion welding work is performed, and the second input position and the output component are in a disengaged state, and the central connection component maintains a tendency to rotate in a second rotational direction, so that the fusion welding work moving assembly is not lifted up, before the fusion welding work starts, the fusion welding work moving assembly is in a lifted state, the locking structure is in a non-locked state, and the second input position and output component are in a connected state. 
     Further, the fusion welding working state locking structure comprises an upper assembly and a lower assembly, the upper assembly is rotatably connected with the locking structure connection position, and the lower assembly is connected with the fusion welding work moving assembly; a compression spring is provided between the upper assembly and the lower assembly, and a length adjusting component is provided for one of the upper assembly and the lower assembly, and an inserting connection component mated with the length adjusting component is provided for the other; the fusion welding device is provided with a limiting structure to limit the maximum rotation angle of the central connection component rotating to the second direction; The locking structure, the fusion welding work moving assembly, and the central connection component are configured such that when the fusion welding work is performing, the locking structure is in a locked state, and the second input position and the output component are in a disengaged state, and the central connection component remains the tendency to rotate in the second rotation direction, the axis of rotation for the rotational connection between the locking structure and the locking structure connection position is outside the first side of the plane; before the fusion welding work starts, the fusion welding work moving assembly is in a lifted state, the locking structure is in a non-locked state, the axis of rotation for the rotational connection between the locking structure and the locking structure connection position is outside the second side of the plane, and the second input position and the output component are in a connected state; the plane is the plane that passes through the axis of rotation of the central connection component and the axis of rotation for the rotational connection between the fusion welding work moving assembly and the locking structure. 
     Further, the fusion welding work moving assembly comprises a fusion welding working component and a fusion welding working power input connection component, and the fusion welding working component and the fusion welding working power input connection component are hinged, the fusion welding working power input connection component is connected with one end of the transmission mechanism by means of an eccentric structure, and the other end of the transmission mechanism is connected with an output end of the fusion welding work motor; the fusion welding working component is slidably connected to a guide rail on the mounting frame; the hinge axis of the fusion welding working component and the fusion welding working power input connection component is parallel to the axis of rotation of the mounting frame. 
     Further, the fusion welding work motor and the transmission mechanism are in a one-way transmission connection relationship, when the second input position of the central connection component and the output component are in a connected state and move in the first direction, the fusion welding work motor and the transmission mechanism are in a drive disengagement connection, and the fusion welding work motor does not drive the transmission mechanism. 
     Further, the fusion welding work moving assembly comprises a mounting frame top spring arranged between the mounting frame and the mounting base. 
     The operating component is a rotary operating handle assembly, and the axis of rotation thereof is parallel to the axis of rotation of the tension wheel of the fusion welding device; the operating handle assembly comprises the operating handle and is combined with a pawl and a gear that rotate synchronously with the operating handle to prevent the tension wheel from rotating in the reverse direction during operation, a swing rod is arranged between the first input position and the operating handle assembly, and the end of the swing rod is mated with the first input position, and the swing rod is provided with gears to engage with the gears on the operating handle. 
     The first input position is configured such that the position of the central connection component at the rotational limit position in the second direction can receive an input external force when the operating component is operated, to cause the central connection component to generate a reset rotation in the first direction. 
     Due to the adoption of the technical solutions of the present invention, the present fusion welding device is able to accomplish automatic band pressing and fusion welding work by means of a relatively simple structure and by means of differently transmitted front and back connections and changes in engagement. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a structural schematic diagram I according to an embodiment of a hand-held baler of the present invention. 
         FIG.  2    is an exploded view of a structure according to an embodiment of a hand-held baler of the present invention. 
         FIG.  3    is a structural schematic diagram II according to an embodiment of a hand-held baler of the present invention. 
         FIG.  4    is a further exploded view of a partial structure according to the embodiment of the hand-held baler of the present invention on the basis of  FIG.  2   . 
         FIG.  5    is a schematic diagram illustrating that a fusion welding work motor preparing starts to work after the handle is lifted according to an embodiment of a hand-held baler of the present invention. 
         FIG.  6    is a schematic diagram when the fusion welding work is performed according to an embodiment of a hand-held baler of the present invention. 
         FIG.  7    is an exploded view of a structure of a fusion welding work moving assembly according to an embodiment of a hand-held baler of the present invention. 
     
    
    
     DETIALED DESCRIPTION 
     Referring to the figures, a fusion welding device of the present invention comprises a rotatable operating handle assembly, a fusion welding work motor  200 , a fusion welding work moving assembly, and a fusion welding work fixed assembly; the fusion welding work motor is connected with the fusion welding work moving assembly by means of a transmission mechanism; the fusion welding device is provided with a central connection component  1  which is rotatably connected to a fixed mounting base  100 , and the reference numeral  10  is a rotating shaft of the central connection component. The central connection component is provided with a first input position  11 , a second input position  12 , and a locking structure connection position  13 . The mounting base  100  is mounted on a base  300  of a hand-held baler. 
     The first input position  11 , on the basis of the operation of the operating handle assembly, causes the central connection component  1  to produce a rotation in a first direction, i.e., the counterclockwise direction in  FIG.  5   . 
     The second input position  12  adopts a sector gear and is transmissively connected to a clutch of the output component  201  of the fusion welding work motor  200 . The output component  201  adopts a gear and is mounted on the motor output shaft  205 . The fusion welding work motor  200  can drive the second input position  12  to produce a rotation in a second direction (that is, the clockwise direction in  FIG.  6   ) by means of an output component  201 , and thereby drive the central connection component  1  to rotate in the second direction as a whole, and after rotating to a set angle, the two disengage, said set angle corresponding to the angle of rotation required for the fusion welding work moving assembly to move to a fusion welding working location (that is, moving from the angle of  FIG.  5    to the angle of  FIG.  6   ). Due to the adoption of the sector gear, the clutch timing and rotation angle are controlled by determining the sector angle of the gear, the structure is simple, and the clutch operation is reliable and stable. 
     The fusion welding device is provided with a fusion welding working state locking structure of the fusion welding work moving assembly, the locking structure is arranged obliquely, the upper end of the locking structure and the locking structure connection position  13  are hinged by means of the shaft  21 , the shaft  21  is parallel to the shaft  10 , the lower end of the locking structure is rotatably connected to the fusion welding work moving assembly; the fusion welding device is provided with a limiting structure to limit the maximum rotation angle of the central connection component  1  in the second direction when the fusion welding work is performed. At the maximum rotation angle, the sector gear and the output component have been disengaged, the limiting structure is composed of the gear  101  on the frame of the hand-held baler and the stop block  14  on the central connection component  1 . The locking structure and the pressing and locking output connection component  13  for the fusion welding work are configured such that the central connection component  1  has a tendency to rotate in the first rotation direction before the fusion welding work motor starts to work, and cause the central connection component  1  to keep the tendency to rotate in the second rotational direction and is pressed against the gear  101  of the limiting structure when the fusion welding work is performing. 
     The preferred structure of the above locking structure is that the locking structure is composed of an upper assembly and a lower assembly, the upper assembly is provided with a first connection component  24 , and the connection component  24  and pressing and locking output connection component  13  for the fusion welding work are hinged by means of a shaft  21 ; the second connection component  25  is provided on the lower assembly, and the second connection component  25  is rotatably connected with the fusion welding work moving assembly. A compression spring  22  is provided between the upper assembly and the lower assembly. The first connection component in the upper assembly is provided with a nut  26  and is connected with the length adjusting component  23  by threaded connection, and the length adjusting component  23  is inserted into the second connection component  25 . The locking structure, the fusion welding work moving assembly, and the central connection component  1  are configured such that when the fusion welding work is performing ( FIG.  6   ), the locking structure is in a locked state, and the second input position  12  and the output component  201  are in a disengaged state, the central connection component  1  maintains a tendency to rotate in the second rotational direction, and the axis of rotation for the rotational connection between the locking structure and the locking structure connection position  13  is outside the first side of the plane; before the fusion welding work starts ( FIG.  5   ), the fusion welding work moving assembly is in a lifted state, the locking structure is in a non-locked state, the axis of rotation for the rotational connection between the locking structure and the locking structure connection position is outside the second side of the plane, and the second input position and the output component  201  are in a connected state; the plane is the plane that passes through the axis of rotation of the central connection component and the axis of rotation for the rotational connection between the fusion welding work moving assembly and the locking structure, and the first side and the second side are divided into the front and back sides of the plane. 
     The fusion welding work moving assembly comprises a mounting frame  31 , the mounting frame  31  is rotatably mounted on the mounting base  100  by means of a bearing  32 , and the mounting frame  31  is also connected with the central connection component by means of the fusion welding working state locking structure; specifically, the mounting frame  31  is rotatably connected with the second connection component  25  by means of the pin shaft  27 . In this way, the rotation of the central connection component  1  in the second direction causes the fusion welding work moving assembly to rotate to the angle of the fusion welding work by means of the locking structure and is locked without reverse rotation. 
     The fusion welding work moving assembly comprises a top spring  37  for the arrangement of the mounting frame between the mounting frame  31  and the mounting base  100 . 
     The axis of rotation of the operating handle assembly is parallel to the axis of rotation of the tension wheel  500  of the fusion welding device; the operating handle assembly comprises the operating handle  6 , the reference numeral  60  is the rotating shaft of the handle, the operating handle  6  is connected with pawl  61  and a gear  62  that rotate synchronously with the operating handle to prevent the tension wheel from rotating in the reverse direction during operation, a swing rod  7  is arranged between the first input position  11  and the operating handle assembly, and the end of the swing rod  7  is mated with the first input position  11  by fixing the connection component  71  (for example, bolt threaded to the end of the swing rod), and the swing rod  7  is provided with gears  72  , the gears  72  are mounted on the base  300 ; the gears  72  engage with the gears  62  on the operating handle  6 ; when the operating handle is rotating, the swing rod  7  is moved by means of the gear connection structure. 
     The fusion welding work moving assembly comprises a fusion welding working component  33  and a fusion welding working power input connection component  34 , the fusion welding working component  33  and the connection component  34  are hinged, and the fusion welding working power input connection component  34  is connected with one end of the transmission mechanism  202  by means of an eccentric shaft  35 ; the transmission mechanism  202  can be a belt transmission mechanism, the eccentric shaft  35  is connected with the driven wheel  203  of the transmission mechanism, and the driving wheel  204  of the transmission mechanism is connected with the output shaft  205  of the fusion welding work motor; the fusion welding working component  33  is slidably connected to the guide rail  36  on the mounting frame  31 , and a snap-fit ball can be provided in the arc groove between their sides, and the fusion welding working component  33  is slidably connected to the guide rail  36 ; the hinge axes of the fusion welding working component  33  and the fusion welding working power input connection component  34  are parallel to the axis of rotation of the mounting frame  31  and are also parallel to the eccentric shaft  35 . 
     The fusion welding work motor  200  and the transmission mechanism  202  are in a one-way transmission connection relationship, when the second input position  12  of the central connection component  1  and the output component  201  are in a connected state (gear meshing state in this embodiment) and move in the first direction, the fusion welding work motor  200  and the transmission mechanism  202  are in a drive disengagement connection, and the fusion welding work motor  200  does not drive the transmission mechanism  202 . This can be connected by means of a one-way bearing in the corresponding direction between the driving wheel  204  and the output shaft  205  of the fusion welding work motor. 
     The fusion welding work fixed assembly is a stationary structure at the bottom of the hand-held baler, and a fixed friction structure  4  is arranged on the upper surface. The fusion welding working component  33  is mated with the fixed friction structure  4 , and causes the joints of the packing belt to be heated and welded by friction. 
     When working, after the previous packing belt joint is welded, the handle  6  is lifted, at this time, the handle assembly rotates, the pawl  61  automatically releases the one-way locking of the tensioning device of the hand-held baler by rotating, and at the same time, the gear  62  drives the gear  72  on the swing rod  7  to rotate, the swing rod  7  is pressed down, and the connection component  71  at its end also acts downward on the first input position  11 . As can be seen from the figure, the swing rod  7  is also obliquely intersected with each axis of rotation on the vertical projection of the plane, so that the swing rod plays a turning role. Therefore, the operating component adopts the aforesaid the structure, and the combination of the aforesaid relevant rotational relationships and directions can automatically associate the tensioning structure and the welding structure, and the work is more reliable and the operation is convenient, and the structure arrangement is more uniform and reasonable, which conforms to ergonomics. 
     After the first input position  11  is subjected to the aforesaid actions, the whole central connection component  1  rotates in the first direction (counterclockwise direction in  FIG.  5   ), thus, the second input position  12  rotates to the position shown in  FIG.  5   . However, due to the one-way transmission connection relationship between the fusion welding work motor  200  and the transmission mechanism  202 , the output component  201  is engaged with the second input position  12  at this time, but the transmission mechanism does not rotate in the opposite direction. After the locking structure connection position  13  is rotated in the first direction, the axis of rotation between the inclined locking structure and the locking structure connection position  13  also rotates to the outside of the second side of the aforementioned plane, thereby releasing the locking, the mounting frame  31  can be rotated and lifted in a state as shown in  FIG.  5   . The bonded packing belt can be removed, and the packing belt that needs to be packed and welded can be put in at the same time. 
     After the packing belt is tightened, the fusion welding work motor  200  receives the signal and starts to work, so that the output component  201  is driven to rotate, the second input position  12  is driven to rotate in the second direction, and thus the entire central connection component  1  is driven to rotate in the second direction. The axis of rotation between the inclined locking structure and the locking structure connection position  13  also rotates outside of the first side of the aforesaid plane to achieve locking, in this state the compression spring  22  causes the central connection component  1  to maintain a tendency to rotate in the second direction, so that the stop block  14  is pressed against the gear  101  of the limiting structure, and under the action of the compression spring  22 , the mounting frame is pressed down to the angle of fusion welding work, thereby realizing locking. 
     At the same time, the fusion welding work motor  200  drives the fusion welding working component  33  to move back and forth under the guidance of the guide rail  36  by means of the transmission mechanism  202 , the eccentric shaft  35 , and the fusion welding working power input connection component  34  to perform the fusion welding work. 
     At this time, since the sector gear has been disengaged from the output component  201  ( FIG.  6   ) and the state is maintained by the locking structure, the central connection component  1  maintains a normal working state without being interfered. 
     When the welding is finished, the handle is lifted again to repeat the above process. 
     In addition, the output component  201  (hereinafter referred to as the motor output gear) is provided with a shaft hole, the motor output shaft  205  of the fusion welding work motor  200  is inserted into the shaft hole, and a torsion spring is provided between the motor output shaft and the motor output gear; there is a spacing in the circumferential direction between the output shaft and the motor output gear. The motor output shaft is provided with a first driving position to drive the sector gear of the second input position to rotate in the second direction. 
     The working direction of the torsion spring is such that after the sector gear of the second input position rotates at a certain angle and is disengaged from the motor output gear, and when the motor output shaft stops rotating, the motor output gear is driven to continue to rotate, to cause the motor output gear to disengage from the connection with the first driving position. The motor output shaft is provided with a second limiting position. 
     The part where the motor drive shaft is connected with the motor output gear is a flat shaft, the motor shaft hole of the motor output gear is provided with a protrusion, and is mated with the first driving position and the second limiting position of the motor output shaft on the both sides of the protrusion respectively. After the torsion spring is disengaged from the motor output gear after the sector gear of the second input position rotates by a certain angle, when the motor output shaft stops rotating, the motor output gear is driven to continue to rotate, so that the motor output gear is disengaged from the connection with the first driving position, and switches to contact with the second limiting position. 
     The central angle corresponding to the spacing is smaller than the angle between adjacent teeth of the sector gear of the first input position. 
     The end face of the motor output gear is provided with a torsion spring connecting hole, the torsion spring is sleeved on the flat shaft, one end of the torsion spring is connected with the torsion spring connecting hole, and the torsion spring is provided with a flat spring coil matching the shape of the flat shaft, and is connected with the flat shaft. 
     When the sector gear of the second input position is rotated in the reset direction, the motor output gear can have a certain rotation angle relative to the motor output shaft through the spacing in the circumferential direction and the torsion spring, which has a wide range of adaptability and avoids the stuck phenomenon between the sector gear of the second input position and the motor output gear, and ensures the automatic connection of the overall work of the hand-held baler. 
     The above description only describes the specific embodiments of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the field of the present invention shall fall within the scope of protection of the present invention.