A swing arm bushing pressing device

Abstract

This invention relates to the field of bushing press-fitting technology, specifically to a swing arm bushing press-out device, comprising a fixing device and a press-out device. The fixing device can fix the base body and the first arm body. The press-out device includes a press head structure and a first drive assembly. The press head structure includes a press head, which is disposed between the first arm ring and the second arm ring and faces the second arm ring. The press head can abut against the end of the outer ring body facing the press head. The bushing unit extends along a first direction, and the press head extends along a second direction. The second direction is deflected relative to the first direction in a horizontal direction toward the base body. The first drive assembly can drive the press head to move along the second direction and push the bushing unit out of the second arm ring. This solves the problems of difficult bushing removal, easy damage to the swing arm, and low efficiency of the swing arm.

Description

Technical Field

[0001] This invention relates to the field of bushing pressing technology, and more specifically, to a swing arm bushing pressing device. Background Technology

[0002] The control arm is an important component of the vehicle suspension system. The end of the control arm is fitted with a bushing where it connects to other components. The bushing contains an elastomer made of flexible rubber material. When the vehicle encounters road impacts, the bushing acts as a flexible connection point, which can reduce wear between metal parts and absorb vibrations and reduce noise.

[0003] However, during the manufacturing process of the swing arm, the bushing needs to be fitted into a pre-set arm ring, and there needs to be a significant force between the bushing and the arm ring to prevent the bushing from coming off. During installation, improper handling may damage the bushing, or when repairing or replacing the swing arm, the damaged bushing needs to be removed. However, due to the presence of its internal elasticity, most parts of the bushing cannot withstand the pushing force during disassembly, leading to structural damage. Existing removal methods easily damage the bushing and arm ring, potentially causing deformation of the swing arm itself and resulting in further component scrapping. Furthermore, these methods are inefficient. Summary of the Invention

[0004] To address the problems of difficult-to-remove swing arm bushings, easy damage to the swing arm, and low efficiency, this invention provides a swing arm bushing pressing device, comprising: a swing arm including a base and a first arm body and a second arm body disposed on the base; a first arm ring is disposed at the end of the first arm body, and a second arm ring is disposed at the end of the second arm body; a bushing unit is disposed within the first arm ring and the second arm ring; the bushing unit includes an outer ring body fitted to the inner sidewall of the first arm ring and the second arm ring, and an inner ring body coaxially disposed with the outer ring body, the inner ring body having an inner ring hole at its center; the swing arm bushing pressing device includes... The device includes a fixing device and a pressing device. The fixing device can fix the base body and the first arm body. The pressing device includes a pressing head structure and a first driving assembly. The pressing head structure includes a pressing head, which is disposed between the first arm ring and the second arm ring and faces the second arm ring. The pressing head can abut against the end of the outer ring body facing the pressing head. The bushing unit extends along a first direction, and the pressing head extends along a second direction. The second direction is deflected relative to the first direction in a horizontal direction toward the base body. The first driving assembly can drive the pressing head to move along the second direction and push the bushing unit out of the second arm ring.

[0005] In some embodiments, the pressing device further includes a guiding unit, which includes a fixedly disposed guide rod and a second driving assembly. The guide rod is disposed on the side of the second arm ring opposite to the pressing head structure. The end of the guide rod can be inserted into the inner ring hole under the drive of the second driving assembly. The pressing device can push the bushing unit to be gradually fitted onto the guide rod.

[0006] In some embodiments, the guide rod extends along a third direction, which is in the same horizontal plane as the first direction, and the third direction is deflected relative to the first direction toward the seat.

[0007] In some embodiments, the extrusion device further includes a correction unit, which includes a correction structure disposed on the outside of the second arm body and capable of abutting against the outer side of the second arm body near the second arm ring.

[0008] In some embodiments, the pressing device further includes a second positioning unit, which is disposed corresponding to the second arm ring. The second positioning unit includes a second positioning block, which is provided with a second arc-shaped groove. The outer peripheral surface of the second arm ring away from the seat body can abut against the arc-shaped groove.

[0009] In some embodiments, the second positioning unit further includes a third driving component, which is capable of driving the positioning block to abut against and push the second arm ring.

[0010] In some embodiments, the fixing device includes an arm positioning assembly and a seat positioning assembly. The arm positioning assembly is used to clamp and fix the first arm and the first arm ring, and the seat positioning assembly is used to clamp and fix the seat.

[0011] In some embodiments, the arm positioning assembly includes an inner positioning unit and an outer positioning unit. The inner positioning unit includes an inner positioning body and an inner positioning post. The inner positioning body can abut against the inner end of the first arm ring. The inner positioning post is disposed on the inner positioning body and extends along the central axis of the first arm ring. The inner positioning post can extend into the inner ring hole. The outer positioning unit includes an outer positioning body and a fourth driving assembly. The outer positioning body can abut against the edge of the outer end of the bushing unit. The fourth driving assembly can drive the outer positioning body away from or towards the bushing unit and apply a force toward the bushing unit.

[0012] In some embodiments, the arm positioning assembly further includes a first positioning unit, the first positioning unit including a first positioning block, the first positioning block being disposed on the side of the first arm ring away from the seat body, the first positioning block being provided with a first arc-shaped groove, the outer peripheral surface of the first arm ring being able to abut against the first arc-shaped groove; the fixing device further includes a seat support, the seat support being disposed on the lower side of the seat body and being able to support the seat body.

[0013] In some embodiments, the fixing device further includes a support block assembly and a clamping assembly. The support block assembly includes a first support block and a second support block. The first support block is disposed on the lower side of the first arm ring and can support the first arm ring. The second support block is disposed on the lower side of the second arm ring and can support the second arm ring. The clamping assembly includes at least one clamping arm and can apply a downward clamping force to the swing arm.

[0014] To address the problems of difficult-to-remove bushings in the swing arm, which easily damage the swing arm and result in low efficiency, the present invention has the following advantages:

[0015] In the above technical solution, the swing arm that needs to be disassembled is fixed by a fixing device, which mainly fixes the base and the first arm body, while the bushing unit in the second arm body needs to be disassembled. The first driving component drives the pressure head to push the outer ring body in the bushing unit. Since the outer ring body mainly comes into contact with the inner circumferential surface of the second arm ring and bears the friction force, the bushing unit can be disassembled by pushing the outer ring body. At the same time, since no force is applied to the elastic body or the like, damage to the bushing unit can be effectively prevented. During the process of the pressure head pushing the outer ring, a relatively large force is required to overcome the friction between the outer ring and the inner circumferential surface of the second arm ring. However, due to the friction, the second arm ring, driven by the inner bushing unit, will undergo slight elastic deformation away from the first arm ring. If the extension direction of the pressure head is initially aligned with the axial direction of the bushing unit, as the pushing progresses, the elastic deformation will cause the axis of the pressure head to deviate from that of the bushing unit. At this point, as the pressure head gradually extends into the first arm ring, it will cause the pressure head to squeeze the first arm ring. The inner wall of the first arm ring is compressed more intensely as the extension increases. The second direction of the pressure head is deflected horizontally toward the seat relative to the first direction of the bushing unit. Although there will be slight uneven force application at the beginning, when the force rises to overcome the friction, the second arm ring will also undergo elastic deformation under the force. At this time, the axial direction of the bushing unit is the same as the extension direction of the pressure head, and the axis of the bushing unit and the pressure head coincides. Therefore, damage to the inner wall of the second arm ring can be avoided during the pushing process. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of a swing arm bushing pressing device according to one embodiment is shown;

[0017] Figure 2 A schematic diagram of a swing arm structure is shown;

[0018] Figure 3 A partial cross-sectional view of a swing arm is shown.

[0019] Figure 4 An enlarged schematic diagram of a partial structure of a swing arm bushing pressing device according to one embodiment is shown;

[0020] Figure 5 A schematic diagram of the central axis of the pressure head, bushing unit, and guide rod according to one embodiment is shown.

[0021] Figure 6 A top view of one embodiment of the swing arm bushing pressing device is shown.

[0022] Figure 7 A schematic lateral cross-sectional view of a swing arm bushing pressing device according to one embodiment is shown.

[0023] Reference numerals: 10-Arm positioning assembly; 11-Inner positioning unit; 111-Inner positioning body; 13-First positioning unit; 131-First positioning block; 20-Pressure device; 211-Pressure head structure; 2111-Pressure head body; 2112-Pressure head; 2113-Avoiding ring; 2114-Guide head; 212-First drive assembly; 2121-Driver; 2122-Slide rail; 2123-Slider; 22-Guide unit; 221-Guide seat; 222-Guide rod; 223-Second drive assembly; 23-Alignment 231-Correction structure; 24-Second positioning unit; 241-Second positioning block; 242-Second arc groove; 30-Seat support; 40-Swing arm; 41-Arm seat unit; 411-Seat body; 412-Seat ring; 42-First arm unit; 421-First arm body; 422-First arm ring; 43-Second arm unit; 431-Second arm body; 432-Second arm ring; 44-Bushing unit; 441-Outer ring body; 442-Elastic body; 443-Inner ring body; 444-Inner ring hole; 51-Pressure arm. Detailed Implementation

[0024] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0025] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0026] This embodiment discloses a swing arm bushing pressing device, such as... Figure 1-7As shown, the swing arm 40 includes a base 411 and a first arm 421 and a second arm 431 disposed on the base 411. A first arm ring 422 is provided at the end of the first arm 421, and a second arm ring 432 is provided at the end of the second arm 431. A bushing unit 44 is disposed within the first arm ring 422 and the second arm ring 432. The bushing unit 44 includes an outer ring 441 that fits against the inner sidewalls of the first arm ring 422 and the second arm ring 432, and an inner ring 443 coaxially disposed with the outer ring 441. An inner ring hole 444 is provided at the center of the inner ring 443. The swing arm bushing pressing device includes a fixing device and a pressing device. The fixing device can fix the base 411. The first arm body 421 and the pressing device include a pressing head structure 211 and a first driving assembly 212. The pressing head structure 211 includes a pressing head 2112. The pressing head structure 211 is disposed between the first arm ring 422 and the second arm ring 432 and is disposed toward the second arm ring 432. The pressing head 2112 can abut against one end of the outer ring body 441 toward the pressing head 2112. The bushing unit 44 extends along a first direction, and the pressing head 2112 extends along a second direction. The second direction is deflected relative to the first direction in a horizontal direction toward the seat body 411. The first driving assembly 212 can drive the pressing head 2112 to move along the second direction and push the bushing unit 44 out of the second arm ring 432.

[0027] It should be noted that the first arm body 421, the second arm body 431, the first arm ring 422, and the second arm ring 432 are for ease of explanation and reference only, and are not intended to limit this application to disassembling only the bushing unit 44 in the second arm ring 432. The swing arm bushing pressing device in this application can be applied to disassembling the bushing unit 44 in both arm rings. The first direction and the second direction in the above technical solution are the directions in the initial state before the disassembly action is performed. The swing arm 40 is as follows Figure 2 , Figure 3As shown, the system includes a first arm unit 42, a second arm unit 43, and an arm seat unit 41. The arm seat unit 41 may include a seat body 411 and a seat ring 412. The first arm unit 42 and the second arm unit 43 have similar structures. The first arm unit 42 includes a first arm body 421 and a first arm ring 422 disposed at the end of the first arm body 421. The second arm unit 43 includes a second arm body 431 and a second arm ring 432 disposed at the end of the second arm body 431. The first arm ring 422 and the second arm ring 432 can be coaxially spaced apart. A bushing unit 44 is respectively disposed inside the cylindrical first arm ring 422 and the second arm ring 432. The bushing unit 44 includes an inner ring body 443 and an outer ring body 443 coaxially arranged. The ring body 441 and the elastic body 442 disposed between the inner ring body 443 and the outer ring body 441 are made of rubber. The outer ring body 441 fits against the inner circumferential surface of the first arm ring 422 or the second arm ring 432. For easy installation, the outer ring body 441 is provided with a flange structure to abut against the outer end face of the first arm ring 422 or the second arm ring 432 for positioning purposes. However, this also means that the bushing unit 44 can only be pushed out and removed from the first arm ring 422 or the second arm ring 432 in the opposite direction of installation. At the same time, the flange structure also makes it difficult to support the outer end face of the first arm ring 422 and the second arm ring 432 when disassembling the bushing unit 44. This disassembly requires pushing the outer ring 441 because the frictional force between the bushing unit 44 and the first arm ring 422 or the second arm ring 432 is relatively large. Pushing the elastic body 442 or the inner ring 443 might cause the elastic body 442 to tear, damaging the bushing unit 44, and the outer ring 441 might still not be able to be disassembled. Therefore, disassembly can only be performed by pushing the outer ring 441. However, the end face area of ​​the outer ring 441 of the bushing unit 44 is small. In order to apply sufficient force, in the above technical solution, a fixing device is used to fix the swing arm 40 that needs to be disassembled. The main fixing devices are the seat 411 and the first arm ring 421, while the second arm ring 432 is fixed. The bushing unit 44 in 31 needs to be disassembled. The first drive assembly 212 drives the pressure head 2112 to push the outer ring 441 in the bushing unit 44. Since the outer ring 441 mainly contacts the inner circumferential surface of the second arm ring 432 and bears the friction force, the bushing unit 44 can be disassembled by pushing the outer ring 441. At the same time, since no force is applied to the elastic body 442, etc., the bushing unit 44 can be effectively prevented from being damaged. The pressure head 2112 needs to be in contact with the end face of the outer ring 441 as much as possible. At this time, the pressure head 2112 will also contact the inner circumferential surface of the first arm ring 422 and the second arm ring 432 when pushing.

[0028] Based on this, since the outer surface of the first arm ring 422 or the second arm ring 432 is blocked by the bushing unit 44, there is no limiting force at this point. Therefore, during the process of the pressure head 2112 pushing the outer ring body 441, a relatively large force is required to overcome the friction between the outer ring body 441 and the inner circumferential surface of the second arm ring 432. However, due to the friction, the second arm ring 432 will also undergo slight elastic deformation in the direction away from the first arm body 421 under the action of the inner bushing unit 44. If, when the extension direction of the pressure head 2112 is aligned with the axial direction of the bushing unit 44 when no force is applied, as the pushing proceeds, due to elastic deformation, the pressure head 2112 will deviate from the axis of the bushing unit 44. At this time, as the pressure head 2112 gradually extends into the first arm ring 422, it will cause the pressure head 2112 to compress the inner wall of the first arm ring 422. Furthermore, as the extension increases, the compression of the inner wall of the first arm ring 422 will intensify. In the above-described scheme of this application, if... Figure 5 As shown in the figure (A is the central axis of the pressure head 2112, B is the central axis of the bushing unit 44, and this attached figure is related to...), Figure 6 Using the same top-down view (the deflection angle is enlarged in the figure for clarity of the deflection direction), the second direction of the pressure head 2112 is deflected horizontally toward the seat 411 relative to the first direction of the bushing unit 44. Although slight uneven force may occur initially, when the force increases to overcome friction, the second arm ring 432 also undergoes elastic deformation under the force, making the axis of the bushing unit 44 the same as the extension direction of the pressure head 2112, and aligning the axes of the bushing unit 44 and the pressure head 2112. This avoids damage to the inner wall of the second arm ring 432 during the pushing process. The angle between the second direction and the first direction is very small, sufficient to satisfy the offset caused by elastic deformation.

[0029] The fixing device can be appropriately set according to needs. It is mainly used to fix and limit the swing arm 40. It mainly restricts the first arm body 421, the first arm ring 422, and the seat 411 on the non-disassembly side. By fully limiting and fixing the above positions, the entire swing arm 40 can be effectively fixed. The pressure head structure 211 may also include a pressure head body 2111 disposed on the side of the pressure head 2112 away from the second arm ring 432. The pressure head body 2111 is also used to connect with the first drive assembly 212. The first drive assembly 212 may be a linear drive device such as a pneumatic cylinder or a hydraulic cylinder. The diameter of the pressure head body 2111 and the pressure head 2112 is the same and the total length is greater than the length of the second arm ring 432. When the pressure head body 2111 and the pressure head 2112 extend into the second arm ring 432, their sides will not scratch the inner wall of the second arm ring 432 due to sharp corners or other structures. Meanwhile, the pressure head structure 211 may also be provided with a clearance ring 2113 and a guide head 2114. The clearance ring 2113 is provided on the inner side of the pressure head 2112 to avoid the inner ring body 443 and the elastic body 442 of the bushing unit 44, so as to prevent them from being damaged by force. The guide head 2114 is located at the center of the clearance ring 2113 and is provided corresponding to the inner ring hole 444 of the inner ring body 443. It can be inserted into the inner ring hole 444 to play a certain guiding role. Specifically, the first driving component 212 includes a driver 2121, a slide rail 2122 and a slider 2123. The driver 2121 can drive the slider 2123 to move along the slide rail 2122. The slide rail 2122 extends along the moving direction of the pressure head 2112, and the pressure head structure 211 is fixedly mounted on the slider 2123.

[0030] The pressure head 2112 can be a ring structure, or more specifically, it can be composed of multiple arc-shaped intervals, forming a multi-lobed structure. When the pressure head 2112 is pulled out from the second arm ring 432 in the opposite direction, it can undergo slight elastic deformation to adapt to the deflection between the first and second directions, thereby ensuring smooth extraction without damaging the inner wall of the second arm ring 432.

[0031] As the bushing unit 44 is gradually pushed out of the second arm ring 432 by the pressed head 2112, the guiding and limiting effect of the second arm ring 432 on the bushing unit 44 gradually decreases. To prevent the bushing unit 44 from shifting relative to the second arm ring 432 during the pushing process due to the reduced guiding effect, such as... Figure 1 , Figure 4-6 As shown, the pressing device also includes a guide unit 22, which includes a fixedly installed guide rod 222 and a second drive assembly 223. The guide rod 222 is disposed on the side of the second arm ring 432 opposite to the press head structure 211. The end of the guide rod 222 can be inserted into the inner ring hole 444 under the drive of the second drive assembly 223. The pressing device can push the bushing unit 44 to gradually be fitted onto the guide rod 222.

[0032] The guide rod 222 is fixedly installed. As the bushing unit 44 is pushed by the pressing head 2112, it gradually fits onto the guide rod 222, ensuring that it moves under the guidance of the second arm ring 432 and the guide rod 222. To facilitate the installation of the swing arm 40, the second drive assembly 223 can drive the guide rod 222 to insert into the inner ring hole 444 of the bushing unit 44 after the swing arm 40 is fixedly installed. The diameter of the guide rod 222 can match the diameter of the inner ring hole 444, and the end of the guide rod 222 can be provided with a tapered guide portion to facilitate the insertion of the guide rod 222 into the inner ring hole 444. The guide rod 222 also prevents the bushing unit 44 from being pushed out of the second arm ring 432 when it is removed. The second drive assembly 223 can be implemented in a suitable manner. Specifically, it can be a cylinder, a hydraulic cylinder, or a drive assembly driven by an electric motor. Alternatively, it can be a simpler rod with a handle. The guide rod 222 can pass through the support plate, and the guide rod 222 can be moved by pulling the handle.

[0033] Similar to the aforementioned pressure head 2112, due to the deflection of the central axis of the bushing unit 44 under the influence of the applied force, the bushing unit 44 and the guide rod 222 will be deflected relative to each other. Therefore, if... Figure 5 As shown, the guide rod 222 extends along a third direction, which is located in the same horizontal plane as the first direction, and the third direction is deflected relative to the first direction toward the seat 411. Figure 5 As shown in the figure (B is the central axis of bushing unit 44, C is the central axis of guide rod 222, and this attached figure is related to...), Figure 6 (The deflection angle is enlarged in the figure for easier explanation of the deflection direction, using the same top view, the third direction of the guide rod 222 is deflected relative to the first direction, so that the bushing unit 44 can actually be on the same axis as the central axis of the guide rod 222 when disassembling.)

[0034] Since the second arm 431 is a cantilever structure extending from the base 411, when the second arm ring 432 at its end is subjected to a thrust, it will cause the second arm 431 to undergo elastic deformation simultaneously. This deformation will be exacerbated by the length of the second arm 431. To prevent excessive deflection of the second arm 431 and the second arm ring 432 under stress, such as... Figure 1 , Figure 6 , Figure 7 As shown, the extrusion device also includes a correction unit 23, which includes a correction structure 231. The correction structure 231 is disposed on the outside of the second arm body 431 and can abut against the outer side of the second arm body 431 near the second arm ring 432.

[0035] When the second arm 431 deflects under the applied force, it can abut against the correction structure 231 to prevent deformation. However, since the outer end face of the second arm ring 432 cannot be fitted with an abutment structure, it will still inevitably undergo slight elastic deformation and deflection at the connection between the second arm ring 432 and the second arm 431. The correction structure 231, however, prevents deformation of the second arm 431 and reduces the deflection angle of the second arm ring 432. Simultaneously, the correction structure 231 also serves to position the second arm 431, ensuring accurate installation.

[0036] As one implementation method, in order to position and support the second arm ring 432, such as Figure 7 As shown, the pressing device also includes a second positioning unit 24, which is configured corresponding to the second arm ring 432. The second positioning unit 24 includes a second positioning block 241, which is provided with a second arc-shaped groove 242. The outer peripheral surface of the second arm ring 432 away from the seat 411 can abut against the arc-shaped groove. The second arc-shaped groove 242 can be configured to match the shape of the second arm ring 432. The second arm ring 432 abuts against the second arc-shaped groove 242, and the outer peripheral surface of the second arm ring 432 can abut against the second arc-shaped groove 242, thereby stably positioning and supporting the second arm ring 432.

[0037] As the bushing unit 44 is gradually pushed out from the second arm ring 432, its contact area with the second arm ring 432 gradually decreases, resulting in a gradual decrease in the force exerted on the second arm ring 432. In particular, compared to the initial stage of pushing the bushing unit 44, when the bushing unit 44 is about to be dislodged, the friction between it and the inner wall of the second arm ring 432 will also decrease rapidly. This causes the second arm ring 432 to return to its initial unforced state under the action of elastic force, causing the pressure head 2112 and the central axis of the bushing unit 44 to deflect again. To solve the above problems, the second positioning unit 24 also includes a third driving component, which can drive the positioning block to abut against and push the second arm ring 432.

[0038] The third drive component can drive the positioning block to move, thereby enabling it to push the second arm ring 432 to remain in the elastic deformation state under the maximum force, thus ensuring that it is coaxial with the pressure head 2112 until the pressure head 2112 completes the pushing work and is pulled out of the second arm ring 432 in the opposite direction. Then the positioning block is driven back to the initial position, and the second arm ring 432 is also driven back to the initial position.

[0039] As a specific implementation method, such as Figure 1 , Figure 6As shown, the fixing device includes an arm positioning assembly 10 and a seat 411 positioning assembly. The arm positioning assembly 10 is used to clamp and fix the first arm 421 and the first arm ring 422, and the seat 411 positioning assembly is used to clamp and fix the seat 411.

[0040] Specifically, such as Figure 6 As shown, the arm positioning assembly 10 includes an inner positioning unit 11 and an outer positioning unit. The inner positioning unit 11 includes an inner positioning body 111 and an inner positioning post. The inner positioning body 111 can abut against the inner end of the first arm ring 422. The inner positioning post is disposed on the inner positioning body 111 and extends along the central axis of the first arm ring 422. The inner positioning post can extend into the inner ring hole 444.

[0041] The outer positioning unit includes an outer positioning body and a fourth driving component. The outer positioning body can abut against the edge of the outer end of the bushing unit 44, and the fourth driving component can drive the outer positioning body away from or towards the bushing unit 44 and apply a force toward the bushing unit 44.

[0042] The first arm body 421 and the first arm ring 422 are clamped and fixed by the inner positioning unit 11 and the outer positioning unit (not shown in the figure), thereby preventing them from moving when the bushing unit 44 inside the second arm ring 432 is disassembled. The inner positioning unit 11 may be provided with an inner positioning post and an inner positioning body 111. The inner positioning post extends into the inner ring hole 444 of the bushing unit 44, and the inner positioning body 111 abuts against the inner side surface of the first arm ring 422. At the same time, similar to the second arm ring 432, the outer side surface of the second arm ring 432 also has a part that abuts against and protrudes from the bushing unit 44. Therefore, in order to prevent the outer positioning body from damaging the bushing, the outer positioning body is provided to abut against the outer edge of the bushing unit 44, that is, the flange structure of the outer ring body 441 of the bushing unit 44. During installation, the inner ring hole 444 of the bushing unit 44 in the first arm ring 422 can be aligned with the inner positioning post and inserted. Then, the outer positioning body can be driven to approach the bushing unit 44 through the fourth drive assembly to achieve the clamping effect.

[0043] At the same time, such as Figure 6 As shown, the arm positioning assembly 10 also includes a first positioning unit 13, which includes a first positioning block 131. The first positioning block 131 is disposed on the side of the first arm ring 422 away from the seat 411. The first positioning block 131 is provided with a first arc-shaped groove, and the outer peripheral surface of the first arm ring 422 can abut against the first arc-shaped groove. The fixing device also includes a seat 411 support 30, which is disposed on the lower side of the seat 411 and can support the seat 411.

[0044] Similar to the correction unit 23, the first positioning block 131 is used to further position the first arm body 421 and the first arm ring 422. Since the seat body 411 is not a simple flat structure, it may have upward or downward bulges or depressions. The seat body 411 support 30 can provide better stable support for the seat body 411. The position where the seat body 411 support 30 connects with the seat body 411 can be set as a contour structure that matches the shape of the seat body 411.

[0045] To further limit the vertical movement of the swing arm 40, such as... Figure 1 , Figure 6 As shown, the fixing device also includes a support block assembly and a clamping assembly. The support block assembly includes a first support block and a second support block. The first support block is disposed on the lower side of the first arm ring 422 and can support the first arm ring 422. The second support block is disposed on the lower side of the second arm ring 432 and can support the second arm ring 432. The clamping assembly includes at least one clamping arm 51 and can apply a downward clamping force to the swing arm 40.

[0046] The clamping assembly may also include a cylinder, hydraulic cylinder or other driving device for driving the clamping arm 51. After the swing arm 40 is placed in place, the clamping arm 51 is driven to press the swing arm 40 against the first support block, the second support block and the support seat 30 of the seat 411 from above. As shown in the figure, there are multiple clamping arms 51, which are respectively pressed against the center of the first arm ring 422, the second arm ring 432 and the seat 411.

[0047] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A swing arm bushing pressing device, characterized in that, The swing arm includes a base and a first arm and a second arm disposed on the base. The first arm is provided with a first arm ring at its end and the second arm is provided with a second arm ring at its end. A bushing unit is provided inside the first arm ring and the second arm ring. The bushing unit includes an outer ring body that fits against the inner sidewall of the first arm ring and the second arm ring. The bushing unit also includes an inner ring body that is coaxially disposed with the outer ring body. An inner ring hole is provided at the center of the inner ring body. The swing arm bushing pressing device includes a fixing device and a pressing device. The fixing device can fix the base body and the first arm body. The pressing device includes a pressing head structure and a first driving component. The pressing head structure includes a pressing head, which is disposed between the first arm ring and the second arm ring and faces the second arm ring. The pressing head can abut against one end of the outer ring body facing the pressing head. The bushing unit extends along a first direction, and the pressing head extends along a second direction. The second direction is deflected relative to the first direction in a horizontal direction toward the base body. The first driving component can drive the pressing head to move along the second direction and push the bushing unit out of the second arm ring. The pressing device further includes a guiding unit, which includes a fixedly mounted guide rod and a second driving assembly. The guide rod is located on the side of the second arm ring opposite to the pressing head structure. The end of the guide rod can be inserted into the inner ring hole under the drive of the second driving assembly. The pressing device can push the bushing unit to be gradually fitted onto the guide rod. The guide rod extends along a third direction, which is located in the same horizontal plane as the first direction, and the third direction is deflected relative to the first direction toward the seat. The pressing device further includes a correction unit, which includes a correction structure disposed on the outside of the second arm body and capable of abutting against the outer side of the second arm body near the second arm ring.

2. The swing arm bushing pressing device according to claim 1, characterized in that, The pressing device further includes a second positioning unit, which is configured corresponding to the second arm ring. The second positioning unit includes a second positioning block, which is provided with a second arc-shaped groove. The outer peripheral surface of the second arm ring away from the seat body can abut against the arc-shaped groove.

3. The swing arm bushing pressing device according to claim 2, characterized in that, The second positioning unit further includes a third driving component, which is capable of driving the positioning block to abut against and push the second arm ring.

4. The swing arm bushing pressing device according to claim 1, characterized in that, The fixing device includes an arm positioning assembly and a seat positioning assembly. The arm positioning assembly is used to clamp and fix the first arm and the first arm ring, and the seat positioning assembly is used to clamp and fix the seat.

5. The swing arm bushing pressing device according to claim 4, characterized in that, The arm positioning assembly includes an inner positioning unit and an outer positioning unit. The inner positioning unit includes an inner positioning body and an inner positioning post. The inner positioning body can abut against the inner end of the first arm ring. The inner positioning post is disposed on the inner positioning body and extends along the central axis of the first arm ring. The inner positioning post can extend into the inner ring hole. The external positioning unit includes an external positioning body and a fourth driving component. The external positioning body can abut against the edge of the outer end of the bushing unit, and the fourth driving component can drive the external positioning body away from or towards the bushing unit and apply a force toward the bushing unit.

6. The swing arm bushing pressing device according to claim 5, characterized in that, The arm positioning assembly further includes a first positioning unit, the first positioning unit includes a first positioning block, the first positioning block is disposed on the side of the first arm ring away from the seat, the first positioning block is provided with a first arc-shaped groove, and the outer peripheral surface of the first arm ring can abut against the first arc-shaped groove. The fixing device also includes a seat support, which is disposed on the lower side of the seat and can support the seat.

7. The swing arm bushing pressing device according to claim 1, characterized in that, The fixing device further includes a support block assembly and a clamping assembly. The support block assembly includes a first support block and a second support block. The first support block is disposed on the lower side of the first arm ring and can support the first arm ring. The second support block is disposed on the lower side of the second arm ring and can support the second arm ring. The clamping assembly includes at least one clamping arm and is capable of applying a downward clamping force to the swing arm.

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