A bushing assembly equipment

Abstract

This application relates to a bushing assembly device, belonging to the field of motor bushing technology. It includes a worktable and a rotating mechanism mounted on the worktable, as well as a shim feeding mechanism, a bushing body feeding mechanism, a roller bearing feeding mechanism, a disc bearing feeding mechanism, a pressing assembly mechanism, and a discharging mechanism arranged circumferentially around the rotating mechanism. The rotating mechanism includes a turntable and a rotating drive component that drives the turntable to rotate intermittently. The shim feeding mechanism, bushing body feeding mechanism, disc bearing feeding mechanism, and bearing feeding mechanism all include a vibrating feeder, a two-axis manipulator, and a receiving assembly. The two-axis manipulator operates along the direction of approaching and moving away from the turntable and in the height direction. The receiving assembly includes a receiving block and a receiving drive component. The receiving block has a receiving slot for single materials to enter. The discharging mechanism also includes a two-axis manipulator with a cylinder suspended above the turntable. The hoppers of the four vibrating feeders are located at the four corners. This application has the effect of adapting to the production of two types of bushings.

Description

Technical Field

[0001] This application relates to the field of motor bushings, and in particular to a bushing assembly device. Background Technology

[0002] A sleeve made into a solid cylindrical shape to protect the shaft is called a bushing. Bushings are similar to bearings in that they both bear the load of the shaft. However, they differ in that bushings are integral structures, with relative movement between the shaft and the bushing during rotation; while bearings are separate units, with relative movement between the inner and outer rings during rotation. Essentially, however, a bushing is a type of sliding bearing.

[0003] There is a bushing such as Figure 1 As shown, the bushing includes a bushing body 101, a gasket 104, a load-bearing body 102, and a bearing 103. One end of the bushing body 101 has multiple limiting protrusions, which are spaced at equal angles around the bushing body 101. The limiting protrusions are bent towards the axis of the bushing body 101. The gasket 104 is fitted between the multiple limiting protrusions. The end of the bushing body 101 away from the gasket 104 has a groove for the load-bearing body 102 and the bearing 103 to be sequentially engaged. The outer wall of the bearing 103... The bearing 103 is spherical with a protruding cylindrical part of smaller diameter. The bearing 103 has a hole coaxially opened along the cylindrical part for the shaft to be inserted. The inner wall of the bushing body 101 is adapted to the outer wall of the bearing 103. The part of the bushing body 101 for the bearing 103 to be inserted has multiple deformable slots at equal angles around the circumference, so that the motor shaft of the motor can be inserted into the bearing 103 and abut against the force-bearing body 102, thereby supporting the motor shaft. The force-bearing body 102 has two structures: one is spherical and the other is disc-shaped.

[0004] During the production and assembly of the aforementioned bushings, a disc-shaped base is typically used, with a suitable seat for placing the bushings on the base. Multiple workstations are arranged sequentially along the circumference of the base, with different component feeding mechanisms arranged sequentially at each workstation. The base is driven to rotate by a drive component and passes through each feeding mechanism in turn. Finally, the assembly is completed by a pressing assembly mechanism. However, since there are two types of load-bearing bodies, two production lines are often required for production. Because the output requirements for each type of bushing production will change, there is a risk of having too many or too few production equipment, which affects production efficiency. Summary of the Invention

[0005] In order to be able to simultaneously produce two types of bushings, this application provides a bushing assembly device.

[0006] The bushing assembly equipment provided in this application adopts the following technical solution:

[0007] A bushing assembly device includes a worktable and a rotating mechanism disposed on the worktable, and a shim feeding mechanism, a bushing body feeding mechanism, a roller bearing feeding mechanism, a disc bearing feeding mechanism, a bearing feeding mechanism, a pressing assembly mechanism, and a feeding mechanism arranged sequentially around the rotating mechanism. The rotating mechanism includes a turntable and a rotating drive component that drives the turntable to rotate intermittently. Placement seats are provided at equal angular intervals along the circumference of the turntable, and each placement seat has a placement groove adapted to the bushing body. The shim feeding mechanism, bushing body feeding mechanism, disc bearing feeding mechanism, and bearing feeding mechanism all include straight... The system includes a vibratory feeder, a two-axis robot, and a receiving assembly. The two-axis robot rotates along the direction of approach and distance from the turntable and in the height direction. The receiving assembly includes a receiving block and a receiving drive unit that drives the receiving block to slide horizontally. The receiving block has a receiving slot for a single material to enter corresponding to the vibratory feeder. The receiving block is driven by the receiving drive unit from the corresponding vibratory feeder to the corresponding two-axis robot. The unloading mechanism also includes a two-axis robot. The hoppers of the four vibratory feeders are located at the four corners of the worktable. The cylinders of the two-axis robot of the unloading mechanism are suspended above the turntable.

[0008] By adopting the above technical solution, a roller-feeding mechanism and a disc-feeding mechanism are combined outside the turntable. This allows the equipment to be modified according to production needs, enabling the production of two types of bushings. It adds an extra station and increases the turntable size, but the structure remains more compact compared to two separate machines. Furthermore, the addition of the roller-feeding mechanism improves the efficiency of the gasket feeding mechanism, bushing body feeding mechanism, disc-feeding mechanism, and bearing feeding mechanism. The feeder's hoppers can be distributed at the four corners of the worktable, making full use of these corners. The roller-loaded feeding mechanism is located between the bushing-loaded main body feeding mechanism and the disc-loaded feeding mechanism, making full use of the space between them. This effectively improves the structural compactness of equipment that only has a disc-loaded feeding mechanism. This distribution method results in a smaller footprint and a more compact overall equipment, effectively utilizing the worktable space. At the same time, the cylinders of the two-axis robotic arms of the unloading mechanism are suspended above the turntable, so they do not extend outside the worktable, reducing the impact on the external space.

[0009] Optionally, the bushing body feeding mechanism further includes a force-applying block. The loading and unloading parts of the two-axis manipulator of the bushing body feeding mechanism adopt pneumatic grippers. Clamping blocks are screwed onto the two claws of the pneumatic grippers. There are two clamping blocks, which are symmetrically arranged on the two claws in a one-to-one correspondence. One end of the clamping block is connected to the claw, and the other end extends toward the turntable. The ends of the two clamping blocks away from the claws are provided with clamping protrusions. The sidewalls of the two clamping protrusions opposite each other are provided with grooves that adapt to the outer wall of the bushing body. The force-applying block is screwed onto the cylinder of the pneumatic gripper, and the lower part of the force-applying block is L-shaped and extends between the two claws, located above the two clamping protrusions.

[0010] By adopting the above technical solution and setting the force block, on the one hand, since the state of the bushing body cannot always be kept in a suitable state due to vibration during the feeding process of the direct vibration feeder, there will often be unevenness. By adjusting the force block, the state of the bushing body is more consistent each time it is clamped by the pneumatic gripper, which is convenient for subsequent placement on the placement seat. At the same time, the presence of the force block also ensures that the pneumatic gripper can place the bushing body in the placement seat properly. It is mainly affected by the friction of the pneumatic gripper claw, while the force block ensures that the claw's grip on the bushing body will not fail.

[0011] Optionally, it also includes a detection mechanism, which includes a magnetic induction detection component. The magnetic induction detection component is disposed on the path through which the two-axis manipulator of the unloading mechanism slides horizontally. The unloading mechanism also includes a waste recycling bin and a finished product receiving bin. The unloading mechanism selects to feed the finished product into the receiving bin or the waste recycling bin based on whether the magnetic induction detection component detects the presence of a pad.

[0012] By adopting the above technical solution, when the magnetic induction detection component detects that no gasket is installed, the bushing is sent to the waste recycling bin for recycling. The gasket can then be further assembled. The bushing with the gasket installed is sent away through the finished product receiving hopper. The corresponding preliminary inspection is also completed during the unloading process.

[0013] Optionally, the detection mechanism further includes an air blowing assembly and a bushing body detection assembly. The air blowing assembly is disposed between the feeding mechanism and the gasket feeding mechanism, and the air blowing assembly is located below the turntable. The bottom of the placement groove has an air blowing hole that passes through the turntable. The air blowing assembly includes an air nozzle, which corresponds to the air blowing hole. The bushing body detection assembly is located between the bushing body feeding mechanism and the roller force-bearing body feeding mechanism. The bushing body detection assembly uses infrared detection.

[0014] By adopting the above technical solution, the presence of the air blowing component, in conjunction with the magnetic induction detection component, allows the air blowing component to blow out the shim from the placement seat when it detects that there is no shim on the bushing being fed. This prevents the occurrence of two shims and avoids affecting subsequent assembly. The bushing body detection component detects whether the bushing body is placed in place. If not, the corresponding placement seat will not be operated again, and the bushing body will be placed again. This allows for the replenishment of bushing bodies and the reassembly process in case of errors or insufficient bushing bodies, with automatic pause.

[0015] Optionally, a grease injection mechanism is also included, which is located between the feeding mechanism and the pressing assembly mechanism.

[0016] By adopting the above technical solution, grease is injected before the bushing is cut and after the bushing is assembled. Compared with injecting grease earlier, the grease will not overflow during the pressing assembly process, which is less likely to affect the pressing assembly mechanism. The grease will only come into contact with the cutting mechanism. Since the positional accuracy requirements for clamping the bushing are not as high as those of other mechanisms during the cutting process, the contact impact of the grease is minimal. At the same time, combined with the detection and blowing of the gasket, the gasket will not stick to the bushing body or the placement seat due to the overflowing grease, which is less likely to affect the accuracy of the detection.

[0017] Optionally, the feeding mechanism includes a finished product receiving hopper, a waste recycling bin, and a switching cylinder. The finished product receiving hopper is inclined and spans the waste recycling bin. The switching cylinder drives the finished product receiving hopper to slide and change position above the waste recycling bin. The direction of horizontal sliding of the two-axis manipulator of the feeding mechanism is perpendicular to the direction of horizontal sliding of the finished product receiving hopper.

[0018] By adopting the above technical solution, the position of the finished product receiving hopper can be changed by switching the cylinder, so that the bushing can fall into the finished product receiving hopper or the waste recycling bin. Compared with a two-axis robot with an additional degree of freedom, the structure is simpler, fewer items need to be driven when switching, the energy consumption is lower, and it is less likely to interfere with other adjacent mechanisms.

[0019] Optionally, the bearing loading mechanism further includes a positioning limiting block. A mounting plate that is stationary relative to the worktable is provided above the turntable. The positioning limiting block is installed on the mounting plate and one end extends out of the turntable, corresponding to the unloading position of the two-axis manipulator of the bearing loading mechanism. A limiting plate is provided on the positioning limiting block. The limiting plate corresponds to the annular area where the placement seat is located, and the limiting plate is spaced apart from the placement seat. When the bushing body is placed on the placement seat, it is located below the limiting plate. The limiting plate has a hole for the bearing to pass through.

[0020] By adopting the above technical solution, the bearing placement position is restricted by the positioning limiting block, which makes it less likely for the bearing to be pressed down excessively, thus better controlling the bearing placement. At the same time, the positioning limiting block and the placement seat are spaced apart, so as not to affect the passage of the bushing body. The bushing body that cannot be placed will be pulled out.

[0021] Optionally, the roller feeding mechanism includes a roller conveying rod, a roller conveying cylinder that drives the roller conveying rod to move vertically, a roller bin mounting plate, a roller bin mounted on the roller bin mounting plate, an agitator motor, an agitator brush, a discharge cylinder, and a discharge rod. The agitator motor is mounted on the roller bin, the agitator brush is located inside the roller bin, and the agitator motor drives the agitator brush to rotate inside the roller bin. The roller bin mounting plate has a sliding track, the discharge rod is slidably mounted in the sliding track, the roller bin has a roller output hole that communicates with the sliding track, the discharge rod has a roller receiving hole that receives rollers, the discharge cylinder is mounted on the roller bin mounting plate and drives the discharge rod to slide and output the rollers on the discharge rod to below the roller conveying rod, and the roller conveying rod has a suction hole for adsorbing the rollers.

[0022] By adopting the above technical solution, the roller force-bearing body feeding mechanism adopts the above method without cylinder components, thus eliminating the need for interference with other cylinders by extending on the turntable and making it less likely to extend outside the worktable. This effectively utilizes the space between the two corners of the worktable for mechanism arrangement. In use, the stirring brush driven by the stirring motor continuously pushes the rollers in the roller chamber to move. The rollers fall through the roller output hole into the roller receiving hole on the roller conveyor rod. Then, the roller conveyor rod moves outward to deliver the rollers to the roller conveyor rod. The roller conveyor rod then picks up the rollers and moves them down into the bushing body. During this process, the roller conveyor rod retracts and runs alternately, continuously completing the feeding of rollers to the bushing body.

[0023] Optionally, the space inside the roller chamber is a cylindrical cavity, and the motor shaft of the agitator motor is eccentrically positioned relative to the roller chamber.

[0024] By adopting the above technical solution, the agitator motor is set eccentrically, so that the agitator brush is also eccentrically agitated relative to the roller brush in the roller chamber, which agitates the rollers better. This makes it less likely for the rollers to get stuck in the corner after the amount of rollers is reduced, resulting in a better agitation effect.

[0025] Optionally, the upper part of the agitator brush is provided with an elastic actuating rod, which abuts against the wall of the roller chamber.

[0026] By adopting the above technical solution, the rollers are easily attached to the wall of the roller chamber during the continuous agitation of the rollers. When the height of the rollers in the roller chamber decreases, the outer rollers stacked on the wall of the roller chamber need to be swept off by the elastic lever to replenish the decreasing number of rollers. The elastic lever is elastically engaged, so it is not easy to fail and maintains the engagement state.

[0027] In summary, by integrating the roller feeding mechanism and the disc feeding mechanism outside the turntable, the equipment can be modified to use different main components depending on production needs. This allows for the production of two types of bushings, adding an extra station and increasing the turntable size. However, compared to using two separate machines, the structure remains more compact. Furthermore, the addition of the roller feeding mechanism allows for the use of direct vibration feeders for the gasket feeding mechanism, bushing body feeding mechanism, disc feeding mechanism, and bearing feeding mechanism. The material bins can be distributed at the four corners of the worktable, making full use of the four corners of the worktable. The roller force-bearing body feeding mechanism is located between the bushing main body feeding mechanism and the disc force-bearing body feeding mechanism, making full use of the space between the two. This is equivalent to improving the structural compactness of the equipment that only has the disc force-bearing body feeding mechanism. This distribution method makes the space occupied smaller, the overall equipment more compact, and effectively utilizes the worktable space. At the same time, the cylinders of the two-axis manipulator of the unloading mechanism are suspended above the turntable, so that they do not extend outside the worktable, reducing the impact on the external space. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the bushing structure in an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the bushing assembly equipment in the embodiments of this application;

[0030] Figure 3 This is a schematic diagram of the structure of the bushing body feeding mechanism in the embodiments of this application;

[0031] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0032] Figure 5 This is a schematic diagram of the structure of the two-axis manipulator of the gasket feeding mechanism in the embodiments of this application;

[0033] Figure 6 This is a partial structural schematic diagram of the adsorption body in the embodiments of this application;

[0034] Figure 7 This is a partial structural cross-sectional view of the adsorption body in the embodiments of this application;

[0035] Figure 8This is a schematic diagram of the installation structure of the positioning limiting block in an embodiment of this application;

[0036] Figure 9 This is a schematic diagram of the structure of the two-axis manipulator of the disc-shaped force-bearing body feeding mechanism in the embodiments of this application;

[0037] Figure 10 This is a schematic diagram of the air blowing assembly in the embodiments of this application;

[0038] Figure 11 This is a schematic diagram of the structure of the mounting base in the embodiments of this application;

[0039] Figure 12 This is a schematic diagram of the feeding mechanism in the embodiments of this application;

[0040] Figure 13 This is a schematic diagram of the roller force-bearing body feeding mechanism in the embodiments of this application;

[0041] Figure 14 This is a schematic diagram of the structure of a roller chamber according to an embodiment of this application;

[0042] Figure 15 This is a schematic diagram of another roller chamber structure in an embodiment of this application;

[0043] Figure 16 This is a schematic diagram of the structure of a composite receiving component in an embodiment of this application;

[0044] Figure 17 This is a schematic diagram of the pressing assembly mechanism and the grease injection mechanism in the embodiments of this application.

[0045] Explanation of reference numerals in the attached drawings: 1. Workbench; 11. Magnetic induction detection assembly; 12. Air blowing assembly; 121. Air nozzle; 13. Bushing main body detection assembly; 14. Grease injection mechanism; 141. Injection nozzle; 2. Rotation mechanism; 21. Mounting plate; 22. Turntable; 23. Placement seat; 231. Placement slot; 232. Air blowing hole; 24. Pad; 241. Pad column; 3. Gasket feeding mechanism; 31. Sliding main body; 32. Upper plate; 33. Lower plate; 34. Adsorption Main body; 341, Adsorption protrusion; 342, Adsorption hole; 35, Adsorption positioning post; 36, Air distribution groove; 37, Air distribution sleeve; 371, External air hole; 38, Rubber layer; 381, Direct adsorption hole; 39, Deformation extrusion protrusion; 391, Deformation extrusion space; 4, Bushing main body feeding mechanism; 41, Direct vibration feeder; 411, Hopper; 412, Transport trough; 42, Two-axis robot arm; 421, Pneumatic gripper; 423, Clamping block; 424, Clamping protrusion 425. Applying force block; 43. Receiving assembly; 431. Receiving block; 432. Receiving drive component; 433. Associated shaft; 44. Receiving slot; 5. Roller loading mechanism; 51. Roller conveyor rod; 52. Roller conveyor cylinder; 53. Roller bin mounting plate; 531. Direct mounting block; 532. Sliding track; 54. Roller bin; 541. Roller output hole; 55. Agitator motor; 56. Agitator brush; 57. Discharge cylinder; 58. Discharge rod 581. Roller receiving hole; 59. Elastic actuating rod; 6. Disc-type force-bearing body feeding mechanism; 61. Adsorption rod; 7. Bearing feeding mechanism; 71. Positioning limiting block; 72. Limiting plate; 8. Pressing assembly mechanism; 81. Pressing cylinder; 82. Pressing rod; 9. Unloading mechanism; 91. Finished product receiving hopper; 92. Scrap recycling bin; 93. Switching cylinder; 10. Baffle; 101. Bushing body; 102. Force-bearing body; 103. Bearing; 104. Gasket. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 2-17 This application will be described in further detail.

[0047] This application discloses a bushing assembly device.

[0048] Reference Figure 2A bushing assembly device includes a worktable 1 and a rotating mechanism 2, a shim feeding mechanism 3, a bushing body feeding mechanism 4, a roller bearing feeding mechanism 5, a disc bearing feeding mechanism 6, a bearing feeding mechanism 7, a pressing assembly mechanism 8, and a feeding mechanism 9, all mounted on the worktable 1. The worktable 1 is square and hollow inside for installing various electrical devices, thereby controlling the operation and power supply of the entire device. In this embodiment, the worktable 1 is generally rectangular. The rotating mechanism 2 includes a mounting plate 21, a turntable 22, and a drive turntable 22. The rotary drive component is a cam divider, preferably a flange-type cam divider. The output shaft of the flange-type cam divider consists of two rings, an outer ring that rotates intermittently and an inner ring that is fixed. The mounting plate 21 is mounted on the inner ring of the cam divider, while the turntable 22 is mounted on the outer ring of the cam divider. The mounting plate 21 and the turntable 22 are coaxial. The diameter of the mounting plate 21 is smaller than the diameter of the turntable 22. The mounting plate 21 is located above the turntable 22. The inner ring of the cam divider passes through the turntable 22 and is fixed to the mounting plate 21.

[0049] The turntable 22 is located at the center of the workbench 1 along its length and at the front of the center along its width. Placement seats 23 are evenly spaced along the circumference of the turntable 22. The placement seats 23 are located on the outer ring of the turntable 22 and on the outer periphery of the mounting plate 21. Each placement seat 23 has a placement groove 231 for fitting the bushing body. In this embodiment, there are 12 placement seats 23, forming 12 workstations on the workbench 1. The workstation corresponding to the front left corner of the workbench 1 is designated as the first workstation. The remaining workstations are then sequentially arranged around the turntable 22. The eleventh workstation faces the front of the workbench 1. The feeding mechanism 3, bushing body feeding mechanism 4, roller bearing body feeding mechanism 5, disc bearing body feeding mechanism 6, bearing feeding mechanism 7, pressing assembly mechanism 8, and unloading mechanism 9 are arranged circumferentially around the turntable 22. Among them, the gasket feeding mechanism 3 is set at the first station, the bushing body feeding mechanism 4 is set at the third station, the roller bearing body feeding mechanism 5 is set at the fifth station, the disc bearing body feeding mechanism 6 is set at the sixth station, the bearing feeding mechanism 7 is set at the eighth station, the pressing assembly mechanism 8 is set at the ninth station, and the unloading mechanism 9 is set at the eleventh station.

[0050] The aforementioned gasket feeding mechanism 3, bushing body feeding mechanism 4, disc force-bearing body feeding mechanism 6, and bearing feeding mechanism 7 all include a direct vibration feeder 41, a two-axis manipulator 42, and a receiving component 43. The hopper 411 of the direct vibration feeder 41 is arranged sequentially around the station of the turntable 22, while the discharge position of the hopper 411 of the direct vibration feeder 41 is arranged in the opposite direction to the station of the turntable 22, so that they can be approximately distributed at the four corners of the workbench 1, making better use of the space on the workbench 1. At the same time, the hopper 411 of the direct vibration feeder 41 of the bushing body feeding mechanism 4 is larger and taller, so it is correspondingly set in the larger corner on the left rear of the workbench 1. The eleventh station corresponds to the position of the workbench 1 with the smallest remaining space relative to the turntable 22, and a discharge mechanism 9 is set there to facilitate discharge. The bearing feeding mechanism 7 of the eighth station corresponds to the right side of the workbench 1, and the corresponding hopper 411 is offset towards the corner of the workbench 1.

[0051] Meanwhile, the cylinders of the two-axis manipulator 42 of the bushing body feeding mechanism 4 are suspended on the turntable 22, while the cylinders of the gasket feeding mechanism 3, the disc force-bearing body feeding mechanism 6 and the bearing feeding mechanism 7 are located above the corresponding hoppers 411. This adapts to the case where the hoppers 411 of the bushing body feeding mechanism 4 are high, and also makes use of the space above the turntable 22. The direct vibration controller of the direct vibration feeder 41 is also installed on the workbench 1. The direct vibration controller is set on the left and right sides of the workbench 1 respectively, corresponding to the direct vibration feeders 41 on the left and right sides, making good use of the area between the hoppers 411 of the workbench 1.

[0052] In this embodiment, both the two-axis manipulator 42 rotates along the direction of approaching and moving away from the turntable 22 and along the height direction.

[0053] Reference Figure 2 , Figure 3 and Figure 4 Taking the bushing body feeding mechanism 4 as an example, the direct vibration feeder 41 of the bushing body feeding mechanism 4 is provided with a transport groove 412 adapted to the bushing body, which restricts the bushing body from being continuously transported in the transport groove 412. The receiving component 43 includes a receiving block 431 and a receiving drive 432 that drives the receiving block 431 to slide horizontally. The receiving block 431 has a receiving slot 44 for the bushing body to enter. Under the drive of the receiving drive 432, the receiving block 431 moves from the corresponding direct vibration feeder 41 to the corresponding two shafts. Specifically, the receiving block 431 slides in a direction perpendicular to the conveying direction of the direct vibrating feeder 41. When the receiving block 431 corresponds to the output end of the direct vibrating feeder 41, the conveying groove 412 is connected to the receiving slot 44, and the receiving slot 44 can only allow one bushing body to enter. When the receiving block 431 moves to the corresponding two-axis robot 42 under the drive of the receiving drive unit 432, the receiving slot 44 is blocked by the direct vibrating feeder 41, and then the two-axis robot 42 grasps it.

[0054] In order to accommodate the installation of the receiving component 43, a bracket is provided on the workbench 1 for the installation and fixing of the receiving drive component 432 and the sliding installation of the receiving block 431. In this embodiment, the receiving drive component 432 is a cylinder.

[0055] The driving component of the two-axis manipulator 42 is a cylinder, while the loading and unloading part of the two-axis manipulator 42 of the bushing body loading mechanism 4 uses a pneumatic gripper 421. The two claws of the pneumatic gripper 421 are screwed with clamping blocks 423. There are two clamping blocks 423, which are symmetrically arranged on the two claws. One end of the clamping block 423 is connected to the claw, and the other end extends towards the turntable 22. The ends of the two clamping blocks 423 away from the claws are respectively provided with clamping protrusions 424. The opposite sidewalls of the two clamping protrusions 424 are provided with grooves that fit the outer wall of the bushing body. The pneumatic gripper 421 is equipped with a force-applying block 425. Specifically, the force-applying block 425 is screwed to the cylinder of the pneumatic gripper 421, and the lower part of the force-applying block 425 is L-shaped and extends between the two claws, located above the two clamping protrusions 424.

[0056] The conveying troughs 412 of the direct vibration feeders 41 of the gasket feeding mechanism 3, the disc force-bearing body feeding mechanism 6, and the bearing feeding mechanism 7 are also adapted to the corresponding materials, and the installation method of the receiving component 43 and the receiving slot 44 are also adapted to the corresponding materials.

[0057] Reference Figure 2 and Figure 5 The loading and unloading components of the two-axis manipulator 42 of the pad loading mechanism 3 include a sliding body 31 that is driven for position adjustment, an upper plate 32, a lower plate 33, an adsorption body 34, and an adsorption positioning column 35 mounted on the sliding body 31. The upper plate 32 and the lower plate 33 are respectively located above and below the sliding body 31. The adsorption body 34 is mounted on the lower side wall of the lower plate 33. The adsorption body 34 is connected to an air pipe for air extraction. The lower side wall of the adsorption body 34 has protruding adsorption protrusions 341. The adsorption protrusions 341 have a ring of multiple adsorption holes 342 around their circumference. The pads are adsorbed through the adsorption holes 342. The positioning post 35 is coaxial with the adsorption protrusion 341, and the upper end of the adsorption positioning post 35 is slidably mounted on the upper plate 32 and has a downward stroke limit. A spring is fitted on the adsorption positioning post 35 and is located between the upper plate 32 and the lower plate 33. The spring drives the adsorption positioning post 35 to slide downward. The lower end of the adsorption positioning post 35 slides through the adsorption protrusion 341 and corresponds to the hole of the gasket. At the same time, the receiving block 431 of the gasket feeding mechanism 3 also has a hole for the adsorption positioning post 35 to enter. The lower end of the adsorption positioning post 35 is a frustum shape with a larger upper end and a smaller lower end, so that the position of the gasket can be adjusted to better correspond to the adsorption hole 342.

[0058] Reference Figure 6 and Figure 7Furthermore, the adsorption body 34 is a stepped column, larger at the top and smaller at the bottom, and a gas distribution groove 36 is formed at the stepped surface. The exhaust port of the gas distribution groove 36 extends upward into the gas distribution groove 36 and extends into a half-hole at the bottom of the gas distribution groove 36. The lower part of the adsorption body 34 is sealed with a gas distribution sleeve 37 that covers the gas distribution groove 36. The gas distribution sleeve 37 has an external exhaust port 371 that is connected to an external exhaust fan and communicates with the gas distribution groove 36. At the same time, a rubber layer 38 is glued to the end of the adsorption protrusion 341. The rubber layer 38 has a direct adsorption hole 381 that is coaxially formed with the adsorption hole 342. The diameter of the direct adsorption hole 381 is smaller than that of the adsorption hole 342. The aperture of 42 allows the rubber layer 38 to shrink and deform under suction. At the same time, the diameter of the rubber layer 38 is slightly larger than the outer diameter of the corresponding gasket, while the diameter of the adsorption protrusion 341 is larger than the diameter of the rubber layer 38. Meanwhile, the outer ring of the adsorption protrusion 341 is provided with a ring of deformation extrusion protrusions 39 at equal angles, forming a deformation extrusion space 391 between the deformation extrusion protrusions 39. The height of the deformation extrusion protrusions 39 is less than the thickness of the rubber layer 38. The outer ring of the rubber layer 38 is slightly raised and its inner diameter is slightly larger than the outer diameter of the gasket. After the rubber layer 38 is deformed by the adsorption force, it can shrink and wrap around the outer peripheral wall of the gasket without affecting the detachment of the gasket.

[0059] The loading and unloading components of the two-axis manipulator 42 of the bearing loading mechanism 7 are the same as those of the two-axis manipulator 42 of the gasket loading mechanism 3. However, the receiving block 431 of the bearing loading mechanism 7 does not have a hole for the insertion of the adsorption positioning column 35. The adsorption positioning column 35 is directly inserted into the hole of the bearing for positioning.

[0060] Reference Figure 8 Meanwhile, the bearing loading mechanism 7 also includes a positioning limiting block 71. One end of the positioning limiting block 71 is mounted on the mounting plate 21 and the other end extends out of the turntable 22, corresponding to the unloading position of the two-axis manipulator 42 of the bearing loading mechanism 7. A limiting plate 72 is provided on the positioning limiting block 71. The limiting plate 72 corresponds to the circular area where the placement seat 23 is located, and the limiting plate 72 is spaced apart from the placement seat 23. When the bushing body is placed on the placement seat 23, it is located below the limiting plate 72. The limiting plate 72 has a hole for the bearing to pass through, and the limiting plate 72 abuts against the adsorption body 34, thereby limiting the stroke of the bearing as it is lowered.

[0061] In a further embodiment, one positioning limit block 71 can be set at each workstation. On the one hand, this means that the installation plate 21 does not need to be installed in a predetermined position according to the positioning limit block 71 during installation. On the other hand, the positioning limit block 71 at different workstations can all play the role of travel restriction, limiting the mechanism at the corresponding workstation.

[0062] Referring to 9, the loading and unloading components of the two-axis manipulator 42 of the disc-type loading mechanism 6 include a sliding body 31 and an adsorption rod 61. The adsorption rod 61 is directly and vertically mounted on the sliding body 31. An adsorption hole 342 is opened at the lower end of the adsorption rod 61 to adsorb and load the disc-type loading body and send it into the bushing body.

[0063] Reference Figure 2 , Figure 10 and Figure 11 The equipment is also equipped with a testing mechanism, which includes a magnetic induction detection component 11, an air blowing component 12, and a bushing body testing component 13. There are two magnetic induction detection components 11: one is located on the unloading mechanism 9, and the other is located at the second station, between the gasket loading mechanism 3 and the bushing body loading mechanism 4. The air blowing component 12 is located at the twelfth station, and the bushing body testing component 13 is located at the fourth station. The air blowing component 12 is located below the turntable 22, and the bottom of the placement groove 231 has a through-hole opening. The air blowing hole 232 of the turntable 22 is connected to the air blowing assembly 12, which includes an air nozzle 121 corresponding to the air blowing hole 232. Specifically, the bottom of the placement groove 231 is provided with a pad block 24 for placing the pad. A pad post 241 protrudes from the pad block 24 and is inserted into the pad. The air hole is opened on the pad block 24 and is located next to the pad post 241, so that the pad can be blown. There is only one air hole, so that the pad is not easy to fall back to its original position due to uniform force. The bushing body detection assembly 13 uses infrared detection to detect whether there is a bushing body on the placement seat 23.

[0064] Reference Figure 17 The pressing assembly mechanism 8 includes a pressing cylinder 81 and a pressing rod 82. The pressing cylinder 81 drives the pressing rod 82 to move vertically. The pressing rod 82 is placed on the seat 23. The lower end of the pressing rod 82 is provided with a pressing protrusion that fits and abuts the bearing, thereby completing the assembly of the entire bushing by pressing down.

[0065] A grease injection mechanism is also provided between the feeding mechanism 9 and the pressing assembly mechanism 8. The grease injection mechanism is located at the tenth station. The injection nozzle 141 of the grease injection mechanism faces downward. The injection nozzle 141 is driven by a cylinder to abut against the opening of the bearing and inject grease into the bearing.

[0066] In this embodiment, a seventh workstation is reserved. On the one hand, it adapts to the distribution of the mechanism on the workbench 1. On the other hand, the reserved seventh workstation can be adapted to the latest force-bearing material feeding after the force-bearing structure is upgraded again, and another workstation can be added. At the same time, a force-bearing detection component can be set at the seventh workstation to detect whether the force-bearing material feeding is completed, so as to decide whether to continue the bearing feeding process. Meanwhile, if the magnetic induction detection component 11 at the second workstation still fails to place the shim after two detections or the corresponding number of detections at the same placement seat, manual intervention can be performed at the seventh workstation to determine whether the shim is stuck in the placement slot 231 due to not being cleaned properly, thus preventing the subsequent shims from being placed in place. Before manual intervention, no further operation is performed on this placement seat 23. It should be noted that the magnetic induction detection component 11 at the second workstation can only detect the presence of a shim if the shim is completely placed in place.

[0067] Reference Figure 2 and Figure 12 The unloading mechanism 9 also includes a two-axis manipulator 42, a finished product receiving hopper 91, a waste recycling bin 92, and a switching cylinder 93. The cylinders of the two-axis manipulator 42 of the unloading mechanism 9 are suspended above the turntable 22, just like the cylinders of the bushing body loading mechanism 4. The two cylinders are at a certain angle so that they will not interfere with each other. At the same time, the cylinders of the unloading mechanism 9 will not extend outside the worktable 1.

[0068] The waste recycling bin 92 is installed and fixed on the workbench 1. The finished product receiving bin 91 is tilted and spans the waste recycling bin 92. The switching cylinder 93 is installed on the bracket on the workbench 1 for the two-axis manipulator 42 of the unloading mechanism 9 to be installed. The switching cylinder 93 drives the finished product receiving bin 91 to slide and change position above the waste recycling bin 92. The horizontal sliding direction of the two-axis manipulator 42 of the unloading mechanism 9 is perpendicular to the horizontal sliding direction of the finished product receiving bin 91. The magnetic induction detection component 11 on the unloading mechanism 9 is set on the path of the horizontal sliding of the two-axis manipulator 42 of the unloading mechanism 9 and is located in front of the finished product receiving bin 91. The unloading mechanism 9 selects to send the finished product receiving bin 91 or the waste recycling bin 92 according to the detection of whether there is a shim by the magnetic induction detection component 11.

[0069] Reference Figure 2 and Figure 13The roller feeding mechanism 5 includes a roller conveyor rod 51, a roller conveying cylinder 52 that drives the roller conveyor rod 51 to move vertically, a roller bin mounting plate 53, a roller bin 54 mounted on the roller bin mounting plate 53, an agitator motor 55, an agitator brush 56, a discharge cylinder 57, and a discharge rod 58. The roller conveying cylinder 52 is mounted on the workbench 1 via a bracket and is located between the roller bin mounting plate 53 and the turntable 22. The roller conveying cylinder 52 is positioned above the roller bin mounting plate 53, and its piston rod is vertically upward. A plate is suspended on the piston rod of cylinder 52 for mounting the roller conveyor rod 51. At the same time, an elastic structure is provided between the roller conveyor rod 51 and the plate on the roller conveyor cylinder 52, so that when the roller conveyor cylinder 52 drives the roller conveyor rod 51 to move downward, the roller conveyor rod 51 can overcome the elastic force and move upward when it comes into contact with the item. The lower end of the roller conveyor rod 51 has an air suction hole for adsorbing the roller. At the same time, the bracket for mounting the roller conveyor cylinder 52 is also provided with a guide sleeve structure for the lower part of the roller conveyor rod 51 to slide through, which plays a guiding role for the roller conveyor rod 51.

[0070] The roller chamber mounting plate 53 is also mounted on the workbench 1 via a bracket. The roller chamber mounting plate 53 is directly connected to the corresponding roller chamber 54 via a vertical cylinder, and guide structures are provided on both sides of the roller chamber mounting plate 53 to adjust the installation height of the roller chamber 54. The roller chamber mounting plate 53 has a sliding track 532, on which a direct mounting block 531 with an inverted U-shaped cross-section is mounted. The discharge rod 58 is slidably mounted within the sliding track 532 and enclosed by the direct mounting block 531. The roller chamber 54 is mounted on the direct mounting block 531. 54 is a cylindrical tube with an open top. The roller chamber 54 has a roller output hole 541. At the same time, the direct mounting block 531 also has a hole connecting the roller output hole 541 and the sliding channel 532. The discharge rod 58 has a roller receiving hole 581 for receiving rollers. The discharge cylinder 57 is installed on the lower side wall of the roller chamber mounting plate 53. The piston rod of the discharge cylinder 57 is connected to the protrusion at the lower end of the discharge rod 58 and drives the discharge rod 58 to slide. The rollers on the discharge rod 58 are brought to the bottom of the roller conveyor rod 51. The roller conveyor rod 51 can pick up and carry the rollers.

[0071] Reference Figure 13 and Figure 14 The agitator motor 55 is mounted on the roller chamber 54. A plate that does not completely enclose the roller chamber 54 is mounted on the roller chamber 54 for the agitator motor 55 to install. The agitator brush 56 is located inside the roller chamber 54, and the agitator motor 55 drives the agitator brush 56 to rotate inside the roller chamber 54.

[0072] There are several ways to coordinate the agitator motor 55 and the agitator brush 56. One way is that the rotation axis of the agitator brush 56 is aligned with the axis of the roller chamber 54, the agitator brush 56 is directly fixed to the agitator motor 55, and the length of the agitator brush 56 is less than the diameter of the roller chamber 54. The upper part of the agitator brush 56 is provided with an elastic actuating rod 59, which abuts against the wall of the roller chamber 54. The rotation center of the agitator brush 56 can be located at half the length of the agitator brush 56, or the agitator brush 56 can be longer on one side and shorter on the other side relative to the rotation center.

[0073] Reference Figure 15 Secondly, the motor shaft of the agitator motor 55 is eccentrically positioned relative to the roller chamber 54, and the rotation center of the agitator brush 56 is still located at half the length of the agitator brush 56. At this time, the length of the agitator brush 56 is twice the shortest distance between the rotation center and the wall of the roller chamber 54. The length of the agitator brush 56 can also be greater than twice the shortest distance between the rotation center and the wall of the roller chamber 54. In this case, the agitator brush 56 is made of elastic material, or the agitator brush 56 and the motor shaft of the angle motor are in a sliding fit, so that the motor shaft can slide back and forth in the length direction of the agitator brush 56. At the same time, the motor shaft of the agitator motor 55 also penetrates into the bottom of the roller chamber 54 and plays a stirring role during the back-and-forth sliding process. This embodiment is preferably the last implementation method, and at this time, the length of the agitator brush 56 is at most the diameter of the roller chamber 54.

[0074] Reference Figure 2 and Figure 16In another embodiment, the roller bearing body and the gasket bearing body can share a single feeding mechanism, namely a two-axis manipulator 42. In this case, the roller bearing body is also fed by the two-axis manipulator 42, and both are fed by suction. The roller bearing body feeding mechanism 5 also uses a direct vibration feeder 41. At the same time, the roller bearing body feeding mechanism 5 and the gasket bearing body feeding mechanism also share a single receiving component 43. In this case, the receiving block 431 of the receiving component 43 is arc-shaped and surrounds the turntable 22. The worktable 1 is also provided with a bracket for the receiving block 431 to rotate and slide around the turntable 22. The corresponding receiving drive 432 is a motor, and the motor is connected to the middle of the receiving block 431 through a connecting shaft 433. This causes the receiving block 431 to rotate. Two receiving slots 44 are opened at both ends of the arc length of the receiving block 431, corresponding to the roller force-bearing body and the pad force-bearing body, respectively. The two stroke limit positions of the receiving block 431 correspond to the direct vibration feeder 41 of the roller force-bearing body mechanism and the direct vibration feeder 41 of the pad force-bearing body mechanism, respectively. At the same time, when the receiving slot 44 of the roller force-bearing body corresponds to the direct vibration feeder 41 of the roller force-bearing body mechanism, the receiving slot 44 of the pad force-bearing body is located below the running trajectory of the corresponding two-axis manipulator 42. Similarly, when the receiving slot 44 of the pad force-bearing body corresponds to the direct vibration feeder 41 of the pad force-bearing body mechanism, the receiving slot 44 of the pad force-bearing body is located below the running trajectory of the corresponding two-axis manipulator 42.

[0075] Meanwhile, in order to limit the force-bearing body in the receiving slot 44, an arc-shaped baffle 10 is directly provided on the worktable 1 with the direct vibration feeder 41 of the roller force-bearing body mechanism and the direct vibration feeder 41 of the pad force-bearing body mechanism to close the receiving slot 44.

[0076] The implementation principle of a bushing assembly device according to an embodiment of this application is as follows: a feeding mechanism for multiple load-bearing bodies is set on a single device with a ring of workstations. The turntable 22 rotates and the various mechanisms feed the load-bearing bodies in sequence. The feeding mechanism is adapted to the rotation of the load-bearing bodies to be assembled, and finally the assembly is completed and the load is unloaded.

[0077] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bushing assembly device, characterized in that: The system includes a worktable (1) and a rotating mechanism (2) mounted on the worktable (1), as well as a shim feeding mechanism (3), a bushing body feeding mechanism (4), a roller force-bearing body feeding mechanism (5), a disc force-bearing body feeding mechanism (6), a bearing feeding mechanism (7), a pressing assembly mechanism (8), and a feeding mechanism (9) arranged sequentially around the rotating mechanism (2). The rotating mechanism (2) includes a turntable (22) and a rotating drive component that drives the turntable (22) to rotate intermittently. Placement seats (23) are arranged at equal angles along the circumference of the turntable (22). The placement seats (23) are provided with placement slots (231) adapted to the bushing body. The shim feeding mechanism (3), the bushing body feeding mechanism (4), the disc force-bearing body feeding mechanism (6), and the bearing feeding mechanism (7) all include a direct vibration feeder (41) and a two-axis manipulator (42). The receiving component (43) and the two-axis manipulator (42) operate in the direction of approaching and moving away from the turntable (22) and in the height direction. The receiving component (43) includes a receiving block (431) and a receiving drive (432) for driving the receiving block (431) to slide horizontally. The receiving block (431) has a receiving slot (44) for a single material to enter corresponding to the linear vibrating feeder (41). The receiving block (431) is driven by the receiving drive (432) from the corresponding linear vibrating feeder (41) to the corresponding two-axis manipulator (42). The unloading mechanism (9) also includes a two-axis manipulator (42). The hoppers (411) of the four linear vibrating feeders (41) are located at the four corners of the workbench (1). The cylinders of the two-axis manipulator (42) of the unloading mechanism (9) are suspended above the turntable (22). The roller bearing body and the gasket bearing body share a feeding mechanism, namely a two-axis manipulator (42). The roller bearing body is also fed by the two-axis manipulator (42) and both are fed by suction. The roller bearing body feeding mechanism (5) also adopts a direct vibration feeder (41). At the same time, the roller bearing body feeding mechanism (5) and the gasket bearing body feeding mechanism also share a receiving component (43). The receiving block (431) of the receiving component (43) is in the shape of an arc strip. The receiving block (431) surrounds the turntable (22). The worktable (1) is also equipped with a bracket for the receiving block (431) to rotate and slide around the turntable (22). The corresponding receiving drive component (432) adopts a motor. The motor is connected to the middle of the receiving block (431) through a connecting shaft (433), thereby driving the receiving block. (431) Rotate, and two receiving slots (44) are opened at both ends of the arc length direction of the receiving block (431) respectively, corresponding to the roller force body and the pad force body respectively. The two stroke limit positions of the receiving block (431) correspond to the direct vibration feeder (41) of the roller force body mechanism and the direct vibration feeder (41) of the pad force body mechanism respectively. At the same time, when the receiving slot (44) of the roller force body corresponds to the direct vibration feeder (41) of the roller force body mechanism, the receiving slot (44) of the pad force body is located below the running trajectory of the corresponding two-axis manipulator (42). Similarly, when the receiving slot (44) of the pad force body corresponds to the direct vibration feeder (41) of the pad force body mechanism, the receiving slot (44) of the pad force body is located below the running trajectory of the corresponding two-axis manipulator (42). Meanwhile, in order to limit the force-bearing body in the receiving slot (44), a circular arc baffle (10) is directly provided on the workbench (1) and the roller force-bearing body mechanism and the gasket force-bearing body mechanism to close the receiving slot (44). According to the force-bearing body rotation adaptation mechanism, the assembly and unloading are completed.

2. The bushing assembly equipment according to claim 1, characterized in that: The bushing body loading mechanism (4) also includes a force application block (425). The loading and unloading part of the two-axis manipulator (42) of the bushing body loading mechanism (4) adopts a pneumatic gripper (421). The two claws of the pneumatic gripper (421) are screwed with clamping blocks (423). There are two clamping blocks (423), and the two clamping blocks (423) are symmetrically arranged on the two claws in a one-to-one correspondence. One end of the clamping block (423) is connected to the claw, and the other end is connected to the other end of the clamping block (423). The two clamping blocks (423) extend toward the turntable (22), and the two clamping blocks (423) are provided with clamping protrusions (424) at the ends away from the claws. The two clamping protrusions (424) have grooves on their opposite sidewalls that are adapted to the outer wall of the bushing body. The force application block (425) is screwed to the cylinder of the pneumatic claw (421), and the lower part of the force application block (425) is L-shaped and extends between the two claws, located above the two clamping protrusions (424).

3. The bushing assembly equipment according to claim 1, characterized in that: It also includes a detection mechanism, which includes a magnetic induction detection component (11). The magnetic induction detection component (11) is set on the path through which the two-axis manipulator (42) of the unloading mechanism (9) slides horizontally. The unloading mechanism (9) also includes a waste recycling bin (92) and a finished product receiving bin (91). The unloading mechanism (9) selects to send the finished product receiving bin (91) or the waste recycling bin (92) according to whether the magnetic induction detection component (11) detects the presence of a pad.

4. The bushing assembly equipment according to claim 3, characterized in that: The detection mechanism further includes an air blowing assembly (12) and a bushing body detection assembly (13). The air blowing assembly (12) is located between the feeding mechanism (9) and the gasket feeding mechanism (3), and the air blowing assembly (12) is located below the turntable (22). The bottom of the placement groove (231) is provided with an air blowing hole (232) that passes through the turntable (22). The air blowing assembly (12) includes an air nozzle (121), which corresponds to the air blowing hole (232). The bushing body detection assembly (13) is located between the bushing body feeding mechanism (4) and the roller force-bearing body feeding mechanism (5). The bushing body detection assembly (13) uses infrared detection.

5. The bushing assembly equipment according to claim 1, characterized in that: It also includes a grease injection mechanism, which is located between the feeding mechanism (9) and the pressing assembly mechanism (8).

6. The bushing assembly equipment according to claim 1, characterized in that: The feeding mechanism (9) includes a finished product receiving hopper (91), a waste recycling bin (92), and a switching cylinder (93). The finished product receiving hopper (91) is inclined and spans the waste recycling bin (92). The switching cylinder (93) drives the finished product receiving hopper (91) to slide and change position above the waste recycling bin (92). The two-axis manipulator (42) of the feeding mechanism (9) slides horizontally in a direction perpendicular to the horizontal sliding direction of the finished product receiving hopper (91).

7. The bushing assembly equipment according to claim 1, characterized in that: The bearing loading mechanism (7) also includes a positioning limiting block (71). A mounting plate (21) is provided above the turntable (22) and is stationary relative to the worktable (1). The positioning limiting block (71) is installed on the mounting plate (21) and one end is suspended on the turntable (22) and corresponds to the unloading position of the two-axis manipulator (42) of the bearing loading mechanism (7). A limiting plate (72) is provided on the positioning limiting block (71). The limiting plate (72) corresponds to the circular area where the placement seat (23) is located, and the limiting plate (72) and the placement seat (23) are spaced apart. When the bushing body is placed on the placement seat (23), it is located below the limiting plate (72). The limiting plate (72) has a hole for the bearing to pass through.

8. The bushing assembly equipment according to claim 1, characterized in that: The roller loading mechanism (5) includes a roller conveying rod (51), a roller conveying cylinder (52) that drives the roller conveying rod (51) to move vertically, a roller bin mounting plate (53), a roller bin (54) mounted on the roller bin mounting plate (53), an agitator motor (55), an agitator brush (56), a discharge cylinder (57), and a discharge rod (58). The agitator motor (55) is mounted on the roller bin (54), and the agitator brush (56) is located inside the roller bin (54). The agitator motor (55) drives the agitator brush (56) to rotate inside the roller bin (54). The roller bin mounting plate (53) has a sliding channel (532), the discharge rod (58) is slidably installed in the sliding channel (532), the roller bin (54) has a roller output hole (541) and is connected to the sliding channel (532), the discharge rod (58) has a roller receiving hole (581) for receiving rollers, the discharge cylinder (57) is installed on the roller bin mounting plate (53) and drives the discharge rod (58) to slide and output the rollers on the discharge rod (58) to below the roller conveying rod (51), the roller conveying rod (51) has an air suction hole for adsorbing the rollers.

9. A bushing assembly device according to claim 8, characterized in that: The space inside the roller chamber (54) is a cylindrical cavity, and the motor shaft of the agitator motor (55) is eccentrically positioned relative to the roller chamber (54).

10. A bushing assembly device according to claim 8 or 9, characterized in that: The agitator brush (56) is provided with an elastic lever (59) on its upper part, and the elastic lever (59) elastically abuts against the wall of the roller chamber (54).

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