Bushing, swing arm and press fitting system and method

Abstract

The invention relates to the technical field of bushings, in particular to a bushing, a swing arm and a press fitting system and method. The outer sleeve assembly comprises an outer sleeve and a supporting ring; the elastic assembly comprises a middle elastic ring, an outer peripheral unit and an inner peripheral ring; the outer circumferential surface of the inner sleeve assembly is connected with the inner circumferential surface of the middle elastic ring and the inner circumferential surface of the inner circumferential ring; when the abutting ring deforms after being extruded by acting force in the axial direction of the abutting ring, the part, moving close to the inner sleeve assembly, of the abutting ring is a first abutting part, and the other part, moving away from the inner sleeve assembly, of the abutting ring is a second abutting part. The size of the first abutting portion in the radial direction of the supporting ring is larger than that of the second abutting portion in the radial direction of the supporting ring. Therefore, the problem that the rubber layer and the hard shell are easy to separate when the bushing is press-fitted is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of bushings, and in particular to a bushing, a swing arm, a press-fitting system and a method. Background Art

[0002] During the vehicle assembly process, the bushing needs to be pressed into the preset mounting hole of the swing arm along its own axial direction. When the vehicle is driving, the bumps and impact forces of the road will be transmitted to the swing arm through the wheel. The elastic material of the bushing can absorb part of the impact energy, weaken the transmission of vibration to the vehicle body, improve ride comfort, and at the same time reduce the rigid impact on the vehicle body and suspension components, reducing the risk of fatigue damage. The bushing is usually composed of a hard outer shell and an internal rubber layer. The hard outer shell provides structural support, and the rubber layer is used to achieve buffering, shock absorption and compensation for assembly errors. The pressing operation is completed by a pressing device. During the pressing operation, the pressing device directly abuts the rubber layer at one axial end of the bushing and applies axial pressure. The bushing is driven by this pressure to gradually enter the mounting hole of the swing arm until it reaches the preset assembly position, thereby completing the assembly of the bushing and the swing arm.

[0003] However, during the press-fitting process, the pressure applied by the press-fitting device directly acts on the bushing's rubber layer. As an elastic material, rubber undergoes significant deformation under pressure. This deformation creates an uneven stress distribution within the rubber layer. When the stress exceeds the connection strength (such as adhesive strength or mechanical clamping strength) between the rubber layer and the hard shell, it can cause separation and delamination at the interface between the rubber layer and the hard shell, ultimately destroying the connection between the two and affecting the bushing's structural integrity and performance. Summary of the Invention

[0004] In order to solve the problem that the rubber layer and the hard shell are easily separated when the bushing is press-fitted, the present invention provides a bushing, a swing arm, a press-fitting system and a method.

[0005] In a first aspect, the present invention provides a bushing, comprising: The outer sleeve assembly includes an outer sleeve and a support ring; the support ring is connected to one axial end of the outer sleeve; the inner diameter of the support ring gradually increases along a first direction; wherein the first direction is the direction from the outer sleeve to the support ring; The elastic component includes a centering ring, an outer peripheral unit, and an inner peripheral ring; the outer peripheral unit includes a connecting ring and an abutting ring; the centering ring, the connecting ring, and the abutting ring are sequentially connected along the first direction; the abutting ring is connected to the inner peripheral surface of the support ring; the outer peripheral surface of the centering ring and the outer peripheral surface of the connecting ring are respectively connected to the inner peripheral surface of the outer sleeve; the centering ring and the inner peripheral ring are sequentially connected along the first direction; the connecting ring and the abutting ring are sleeved on the outer peripheral side of the inner peripheral ring; An inner sleeve assembly, the outer circumference of which is connected to the inner circumference of the centering ring and the inner circumference of the inner ring respectively; When the abutment ring is squeezed and deformed by the force acting along the axial direction of the abutment ring, the part of the abutment ring that moves toward the inner sleeve assembly is the first abutment portion, and the other part of the abutment ring that moves away from the inner sleeve assembly is the second abutment portion; the radial size of the first abutment portion along the support ring is greater than the radial size of the second abutment portion along the support ring.

[0006] In some embodiments, 45°<α<90°; wherein α is the minimum angle between the side of the support ring away from the outer sleeve and the central axis of the support ring in the direction of the central axis of the support ring.

[0007] In some embodiments, the outer peripheral unit is spaced apart from the inner peripheral ring.

[0008] In some embodiments, A>B; wherein A is the maximum thickness dimension of the connecting ring along its own radial direction, and B is the maximum thickness dimension of the inner ring along its own radial direction.

[0009] In some embodiments, N<M; wherein N is the dimension of the inner circumference of the support ring away from one end of the outer sleeve and the inner circumference of the support ring close to one end of the outer sleeve along the axial direction of the outer sleeve, and M is the dimension of the inner circumference of the support ring away from one end of the outer sleeve and the end of the bullet ring close to the support ring along the axial direction of the outer sleeve.

[0010] In some embodiments, the outer diameter of the abutment ring away from the impact ring gradually decreases along the first direction.

[0011] In some embodiments, the inner sleeve assembly includes an inner sleeve and a first convex ring; the inner circumference of the first convex ring is connected to the outer circumference of the inner sleeve; the outer diameter of the first convex ring is larger than the outer diameter of the inner sleeve; the inner circumference of the centering ring is connected to the outer circumference of the inner sleeve and / or the outer circumference of the first convex ring; the inner circumference of the inner ring is connected to the outer circumference of the inner sleeve and / or the outer circumference of the first convex ring.

[0012] In a second aspect, the present invention provides a swing arm, comprising a bushing according to any one of the first aspects, and further comprising: Arm base assembly; The first arm assembly includes a first arm body and a first arm ring; one end of the first arm body is connected to the arm base assembly, and the other end is connected to the first arm ring.

[0013] In a third aspect, the present invention provides a press-fitting system, the press-fitting system comprising a swing arm according to any one of the second aspects, the bushing further comprising: The press-fitting assembly includes a press-fitting unit and a base unit; the press-fitting unit includes a press-fitting ring and a press-fitting head; the press-fitting ring is movably connected to the base unit; the press-fitting head is connected to the press-fitting ring; The pressing system includes a working state; the working state includes the arm seat assembly and / or the first arm assembly being detachably connected to the base unit, and the pressing head driving the abutment ring to move toward the first arm ring to an assembly completion state; the assembly completion state includes the outer peripheral wall of the sleeve assembly being connected to the inner peripheral wall of the first arm ring, and the ratio of the overlapping area of ​​the first projection area and the second projection area to the area of ​​the first projection area is greater than or equal to a set value; wherein, the first projection area is the projection area of ​​the bushing along the radial direction of the bushing; the second projection area is the projection area along the radial direction of the bushing with the first arm ring.

[0014] In some embodiments, an inner diameter of the press fitting head gradually decreases along the first direction.

[0015] In a fourth aspect, the present invention provides a press-fitting method, which is applied to any press-fitting system described in the third aspect, and further includes: Upon completion of positioning, the press-fitting head moves to abut against a side of the abutment ring away from the impact ring; wherein, the completion of positioning includes detachably connecting the arm base assembly and / or the first arm assembly to the base unit, abutting against a side of the first arm ring closer to the press-fitting head at an end of the outer sleeve away from the support ring; and coinciding with a central axis of the outer sleeve and a central axis of the first arm ring; The press-fitting head drives the abutment ring to deform and move along a second direction; wherein the second direction is the direction from the support ring to the outer sleeve; when the abutment ring is deformed, the portion of the abutment ring that moves toward the inner sleeve assembly is the first abutment portion, and the other portion of the abutment ring that moves away from the inner sleeve assembly is the second abutment portion; the radial dimension of the first abutment portion along the support ring is greater than the radial dimension of the second abutment portion along the support ring; Based on the swing arm being in the press-fitting completion state, the press-fitting head stops moving or moves along the first direction.

[0016] In order to solve the problem that the rubber layer and the hard shell are easily separated when the bushing is pressed, the present invention has the following advantages: By setting the radial dimension of the first abutting portion of the abutment ring to be larger than the radial dimension of the second abutting portion of the abutment ring along the support ring, when the abutment ring is squeezed and deformed by a force acting along its axial direction, the majority of the abutment ring can be moved toward the inner sleeve assembly, thereby preventing the abutment ring from tearing, ultimately solving the problem in the prior art of the elastic component deforming and causing the connection between the elastic component and the hard outer shell to be damaged. The connection structure between the support ring and the outer sleeve, and the sequential connection relationship between the various components in the elastic assembly, provide a structural basis for the directional deformation of the abutment ring, ensuring the stability of the connection between the abutment ring and the inner circumference of the outer sleeve and the outer circumference of the inner sleeve assembly during the force application process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a bushing press-fitting system according to an embodiment is shown; Figure 2 A schematic cross-sectional view of a bushing according to an embodiment is shown; Figure 3 A schematic cross-sectional view of a bushing according to an embodiment is shown from a second perspective; Figure 4 A schematic diagram of a bushing according to an embodiment from a first perspective is shown; Figure 5 A schematic diagram of a bushing according to an embodiment from a second perspective is shown; Figure 6 A schematic diagram of a swing arm from a first perspective according to an embodiment is shown; Figure 7 A schematic diagram of a swing arm from a second perspective of an embodiment is shown.

[0018] Figure numerals: 10 outer sleeve assembly; 11 outer sleeve; 12 supporting ring; 20 elastic assembly; 21 centering ring; 22 peripheral unit; 221 connecting ring; 222 abutting ring; 2221 first abutting portion; 2222 second abutting portion; 23 inner peripheral ring; 30 inner sleeve assembly; 31 inner sleeve; 32 first convex ring; 33 second convex ring; 34 third convex ring; 40 arm seat assembly; 50 first arm assembly; 51 first arm body; 52 first arm ring; 60 second arm assembly; 61 second arm body; 62 second arm ring; 70 press-fitting assembly; 71 press-fitting unit; 711 press-fitting ring; 712 press-fitting head. DETAILED DESCRIPTION

[0019] 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 implement the present disclosure, rather than to imply any limitation on the scope of the present disclosure.

[0020] As used herein, the term "including" 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 "based, at least in part, 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." Terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "vertical," "horizontal," "transverse," and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily intended to better describe the present application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationships. For example, the term "on" may, in certain circumstances, be used to indicate a dependency or connection relationship. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" are to 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 directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, 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 and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0021] During the press-fitting process between the bushing and the swing arm assembly, the bushing's elastic component 20 must be connected to both the outer sleeve assembly 10 and the inner sleeve assembly 30 to achieve force transmission and cushioning. When the abutting portion of the elastic component 20 is subjected to axial force, it deforms. Due to the lack of directional constraints during this deformation process, excessive stress can easily occur at the connection between the elastic component 20 and the outer sleeve assembly 10, potentially causing tearing at the connection.

[0022] Embodiment 1: This embodiment discloses a bushing, such as Figure 1 As shown, the bushing includes an outer sleeve component 10, an elastic component 20 and an inner sleeve component 30. The outer sleeve component 10 can be connected to the swing arm, and the elastic component 20 can play a certain buffering role when the swing arm is vibrated. Figure 4As shown, the inner sleeve assembly 30 can be connected to other components so that the swing arm assembly can work together with the other components. Figure 5 As shown, the outer sleeve assembly 10 includes an outer sleeve 11 and a support ring 12. The support ring 12 is connected to one axial end of the outer sleeve 11. The inner diameter of the support ring 12 gradually increases along the first direction to facilitate guiding the deformation direction of the abutment ring 222. Figure 2 As shown, the first direction is the direction from the outer sleeve 11 to the support ring 12 .

[0023] The elastic component 20 includes a centering ring 21, an outer peripheral unit 22, and an inner peripheral ring 23. The outer peripheral unit 22 includes a connecting ring 221 and an abutting ring 222. The centering ring 21, the connecting ring 221, and the abutting ring 222 are connected in sequence along a first direction. The abutting ring 222 is connected to the inner peripheral surface of the support ring 12, thereby enhancing the connection stability between the elastic component 20 and the outer sleeve component 10. The outer peripheral surface of the centering ring 21 and the outer peripheral surface of the connecting ring 221 are respectively connected to the inner peripheral surface of the outer sleeve 11, thereby achieving the fixation of the elastic component 20 to the outer sleeve 11. The centering ring 21 and the inner peripheral ring 23 are connected in sequence along a first direction. The connecting ring 221 and the abutting ring 222 are sleeved on the outer peripheral side of the inner peripheral ring 23, forming an internal support structure of the elastic component 20, so that the elastic component 20 can maintain overall stability during deformation.

[0024] The outer circumference of the inner sleeve component 30 is connected to the inner circumference of the center ring 21 and the inner circumference of the inner ring 23 respectively, thereby achieving fixation with the elastic component 20, so that the inner sleeve component 30 can cooperate with the elastic component 20 to bear force and transmit external force, while ensuring the compactness and stability of the overall structure.

[0025] When the outer circumference of the bushing moves to connect with the inner circumference of the first arm ring 52 (i.e., during the installation of the bushing and the first arm ring 52), the abutting ring 222 is subjected to an axial force (i.e., Figure 2 When the abutment ring 222 is squeezed and deformed (as shown in the figure), the portion of the abutment ring 222 that moves toward the inner sleeve assembly 30 is the first abutment portion 2221, and the portion of the abutment ring 222 that moves away from the inner sleeve assembly 30 is the second abutment portion 2222. The radial dimension of the first abutment portion 2221 along the support ring 12 is greater than the radial dimension of the second abutment portion 2222 along the support ring 12. When the abutment ring 222 is squeezed and deformed by the axial force, most of the abutment ring 222 can move toward the inner sleeve assembly 30, allowing the connecting ring 221 and the impact ring 21 to simultaneously provide support for the abutment ring 222, reducing the movement distance of the deformed portion of the abutment ring 222 and jointly bearing the axial pressure, thereby preventing the abutment ring 222 from tearing and preventing the connection between the abutment ring 222 and the support ring 12 from being damaged.

[0026] Furthermore, the first abutting portion 2221 and the second abutting portion 2222 may both be annular bodies, and the outer circumferential surface of the first abutting portion 2221 is connected to the outer circumferential surface of the second abutting portion 2222 .

[0027] Furthermore, if Figure 3 As shown, 45°<α<90°. Among them, α is the minimum angle between the side of the support ring 12 away from the outer sleeve 11 and the central axis of the support ring 12 in the direction of the central axis of the support ring 12. By limiting the angle to between 45° and 90°, the installation process of the bushing and the first arm ring 52 can avoid the problem that when the angle is too small, the abutment ring 222 is squeezed and deformed by the force along the axial direction of the abutment ring 222, the abutment ring 222 is easily moved outward, resulting in the tearing of the connection between the abutment ring 222 and the support ring 12. It also prevents the support ring 12 from being unable to provide sufficient axial support for the abutment ring 222 when the angle is too large, resulting in the abutment ring 222 being easily moved inward and causing the connection to tear, thereby ensuring the stability of the connection between the support ring 12 and the abutment ring 222.

[0028] Furthermore, if Figure 2 As shown, the outer unit 22 and inner ring 23 are spaced apart, providing the necessary space for the elastic assembly 20 to deform. When the bushing is installed on the first arm ring 52, the abutment ring 222 is subjected to axial force, causing the first abutment portion 2221 to move toward the inner sleeve assembly 30. Because the outer unit 22 and inner ring 23 are spaced apart, the first abutment portion 2221 encounters less resistance in its movement toward the inner sleeve assembly 30, making it easier for the abutment ring 222 to deform toward the inner ring 23. Alternatively, when the bushing is being assembled to absorb vibration and the outer sleeve assembly 10 and inner sleeve assembly 30 undergo radial relative movement, the outer unit 22 and inner ring 23 are spaced apart, allowing the portion of the impact ring 21 that is squeezed and deformed by the outer sleeve assembly 10 and inner sleeve assembly 30 to more easily move toward the space between the outer unit 22 and inner ring 23, thereby accommodating the squeezed and protruding portion of the elastic assembly 20 and ensuring the normal deformation function of the elastic assembly 20.

[0029] Furthermore, if Figure 3As shown, A>B. Among them, A is the maximum thickness dimension of the connecting ring 221 along its own radial direction, and B is the maximum thickness dimension of the inner ring 23 along its own radial direction. The thickness of the connecting ring 221 is greater than that of the inner ring 23, which can enhance the structural strength of the connecting ring 221. When the space between the outer sleeve 11 and the inner sleeve assembly 30 is limited, the thicker connecting ring 221 can improve the stability of its connection with the outer sleeve 11, and since the outer unit 22 is subjected to force during the assembly process with the first arm ring 52 and after the bushing is mounted, the thicker connecting ring 221 can provide better support, avoiding the connection between the connecting ring 221 and the outer sleeve assembly 10 from being torn and failing due to the connecting ring 221 being too thin during press-fitting. The inner ring 23 is mainly subjected to force after mounting, and has lower requirements for structural strength. The relatively thin thickness can save space while ensuring functionality.

[0030] Furthermore, if Figure 3 As shown, N < M. N represents the axial dimension of the outer sleeve 11 between the inner circumference of the support ring 12 at one end away from the outer sleeve 11 and the inner circumference of the support ring 12 at one end closer to the outer sleeve 11, and M represents the axial dimension of the inner circumference of the support ring 12 at one end away from the outer sleeve 11 and the inner circumference of the impact ring 21 at one end closer to the support ring 12. This ensures that the bottom surface of the abutment ring 222 on the support ring 12 is higher than the top surface of the impact ring 21. During installation of the bushing and first arm ring 52, the space at the top of the impact ring 21 provides sufficient space for the first abutment portion 2221 of the abutment ring 222 to deform toward the inner sleeve assembly 30, ensuring that the abutment ring 222 can deform smoothly without excessive restriction.

[0031] Furthermore, the outer diameter of the abutment ring 222 on the side away from the impact ring 21 gradually decreases along the first direction, so that the force applied to the abutment ring 222 can generate forces along the central axis and along the axial direction of the abutment ring 222, thereby guiding the deformation direction of the abutment ring 222. Through this structural design, when the abutment ring 222 is subjected to an axial force, the portion away from the impact ring 21 is more likely to deform toward the inner sleeve assembly 30, thereby facilitating directional deformation of the abutment ring 222.

[0032] Furthermore, the inner sleeve assembly 30 includes an inner sleeve 31 and a first raised ring 32. The inner circumference of the first raised ring 32 is connected to the outer circumference of the inner sleeve 31. The outer diameter of the first raised ring 32 is larger than that of the inner sleeve 31. The inner circumference of the center ring 21 is connected to the outer circumference of the inner sleeve 31 and / or the outer circumference of the first raised ring 32. The inner circumference of the inner ring 23 is connected to the outer circumference of the inner sleeve 31 and / or the outer circumference of the first raised ring 32, increasing the contact area between the inner sleeve assembly 30 and the elastic assembly 20 (center ring 21 and inner ring 23). This increased contact area increases the friction between the inner sleeve assembly 30 and the elastic assembly 20, thereby enhancing the stability of the connection between the two.

[0033] Furthermore, the inner sleeve assembly 30 includes a second raised ring 33 and a third raised ring 34. The inner circumference of the second raised ring 33 is connected to the outer circumference of the inner sleeve 31. The outer diameter of the second raised ring 33 is larger than the outer diameter of the inner sleeve 31. The inner circumference of the centering ring 21 is connected to the outer circumference of the inner sleeve 31 and / or the outer circumference of the second raised ring 33. The inner circumference of the third raised ring 34 is connected to the outer circumference of the inner sleeve 31. The outer diameter of the third raised ring 34 is larger than the outer diameter of the inner sleeve 31. The inner circumference of the centering ring 21 is connected to the outer circumference of the inner sleeve 31 and / or the outer circumference of the third raised ring 34.

[0034] Embodiment 2: This embodiment discloses a swing arm, which includes any bushing of embodiment 1 and further includes: Arm base assembly 40.

[0035] like Figure 6 As shown, the first arm assembly 50 includes a first arm body 51 and a first arm ring 52. One end of the first arm body 51 is connected to the arm base assembly 40, and the other end is connected to the first arm ring 52. The first arm ring 52 can be used to assemble and connect with other components (such as the outer shell assembly 10) to enable the swing arm to transmit force and motion.

[0036] In other embodiments, Figure 7 As shown, the swing arm further includes a second arm assembly 60, which includes a second arm body 61 and a second arm ring 62. One end of the second arm body 61 is connected to the arm base assembly 40, and the other end is connected to the second arm ring 62. The second arm ring 62 can be used to assemble and connect with other components (such as the outer cover assembly 10), allowing the swing arm to transmit force and motion.

[0037] Embodiment 3: This embodiment discloses a press-fitting system, which includes any swing arm of embodiment 2 and further includes: like Figure 1 As shown, the press-fitting assembly 70 includes a press-fitting unit 71 and a base unit. The press-fitting unit 71 includes a press-fitting ring 711 and a press-fitting head 712. The press-fitting ring 711 is movably connected to the base unit, allowing the press-fitting unit 71 to be adjusted. The press-fitting head 712 is connected to the press-fitting ring 711. The connection between the press-fitting head 712 and the press-fitting ring 711 allows for applying pressure.

[0038] In other embodiments, the press-fitting assembly 70 further includes a base unit connected to the press-fitting ring 711. The press-fitting unit 71 further includes a driving portion connected to the press-fitting ring 711 so as to drive the press-fitting ring 711 to move.

[0039] The press-fitting system comprises a working state. The working state comprises detachable connection of the arm seat assembly 40 and / or the first arm assembly 50 with the base unit, driving of the press-fitting head 712 to move the abutment ring 222 to the assembly completion state in the direction close to the first arm ring 52, positioning through the detachable connection of the arm seat assembly 40 and / or the first arm assembly 50 with the base unit, and moving of the press-fitting head 712 to drive the abutment ring 222 to complete assembly. The assembly completion state comprises connection of the outer peripheral wall of the sleeve assembly 10 with the inner peripheral wall of the first arm ring 52, and a ratio of an area in which the first projection area and the second projection area coincide to an area of the first projection area is greater than or equal to a set value. The first projection area is a projection area of the bushing along a bushing radial direction. The second projection area is a projection area of the first arm ring 52 along the bushing radial direction. The connection of the sleeve assembly 10 with the first arm ring 52 ensures that assembly is in place, and setting of the projection area coincidence degree ensures assembly accuracy, so that assembly of the bushing with the first arm ring 52 meets a preset requirement.

[0040] Further, the inner diameter of the press-fitting head 712 gradually decreases in the first direction, so that an inner peripheral surface thereof forms an inclined structure. During press-fitting, the inclined inner peripheral surface abuts against the abutment ring 222, can guide a deformation direction of the abutment ring 222, and makes part of the abutment ring 222 more easily move in the direction close to the inner sleeve assembly 30, thereby assisting in realizing directional deformation of the abutment ring 222.

[0041] Embodiment four: The embodiment discloses a press-fitting method, the press-fitting method comprises any press-fitting system of the embodiment three, and the press-fitting method comprises steps S10-S30, and each step is described in detail as follows: In step S10, based on positioning completion, the press-fitting head 712 is moved to abut against one side of the abutment ring 222 away from the middle elastic ring 21. The positioning completion comprises detachable connection of the arm seat assembly 40 and / or the first arm assembly 50 with the base unit, and abutment of one end of the sleeve tube 11 away from the support ring 12 with the side of the first arm ring 52 close to the press-fitting head 712, so as to ensure that relative positions of components before press-fitting are accurate, and the connection of the arm seat assembly 40 and / or the first arm assembly 50 with the base unit realizes fixation. The center axis of the sleeve tube 11 coincides with the center axis of the first arm ring 52, thereby laying a foundation for accuracy of subsequent press-fitting. The press-fitting head 712 is moved to abut against the abutment ring 222, so that pressure can be effectively transmitted to the abutment ring 222.

[0042] In step S20, as the press head 712 moves to abut the side of the abutment ring 222 away from the impact ring 21, the press head 712 causes the abutment ring 222 to deform and move in a second direction. The second direction is the direction from the support ring 12 to the outer sleeve 11. During deformation, the portion of the abutment ring 222 that moves toward the inner sleeve assembly 30 serves as the first abutment portion 2221, while the portion of the abutment ring 222 that moves away from the inner sleeve assembly 30 serves as the second abutment portion 2222. The radial dimension of the first abutment portion 2221 along the support ring 12 is greater than the radial dimension of the second abutment portion 2222 along the support ring 12. This allows the abutment ring 222 to deform primarily toward the inner sleeve assembly 30, preventing tearing and ensuring a stable connection between the abutment ring 222 and other components during assembly.

[0043] In step S30, based on the swing arm being in the press-fitting completion state, the press-fitting head 712 stops moving or moves along the first direction to ensure that the assembly is completed in a preset state and to avoid damage to components caused by excessive press-fitting.

[0044] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and that in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A bushing, characterized in that: The bushing includes: The outer sleeve assembly includes an outer sleeve and a support ring; the support ring is connected to one axial end of the outer sleeve; the inner diameter of the support ring gradually increases along a first direction; wherein the first direction is the direction from the outer sleeve to the support ring; The elastic component includes a centering ring, an outer peripheral unit, and an inner peripheral ring; the outer peripheral unit includes a connecting ring and an abutting ring; the centering ring, the connecting ring, and the abutting ring are sequentially connected along the first direction; the abutting ring is connected to the inner peripheral surface of the support ring; the outer peripheral surface of the centering ring and the outer peripheral surface of the connecting ring are respectively connected to the inner peripheral surface of the outer sleeve; the centering ring and the inner peripheral ring are sequentially connected along the first direction; the connecting ring and the abutting ring are sleeved on the outer peripheral side of the inner peripheral ring; An inner sleeve assembly, the outer circumference of which is connected to the inner circumference of the centering ring and the inner circumference of the inner ring respectively; When the abutment ring is squeezed and deformed by the force acting along the axial direction of the abutment ring, the part of the abutment ring that moves toward the inner sleeve assembly is the first abutment portion, and the other part of the abutment ring that moves away from the inner sleeve assembly is the second abutment portion; the radial size of the first abutment portion along the support ring is greater than the radial size of the second abutment portion along the support ring.

2. A bushing according to claim 1, characterized in that: 45°<α<90°; wherein α is the minimum angle between the side of the support ring away from the outer sleeve and the central axis of the support ring in the direction of the central axis of the support ring.

3. The bushing according to claim 1, characterized in that: The outer peripheral unit is spaced apart from the inner peripheral ring.

4. A bushing according to claim 3, characterized in that: A>B; wherein A is the maximum thickness dimension of the connecting ring along its own radial direction, and B is the maximum thickness dimension of the inner ring along its own radial direction.

5. A bushing according to claim 3, characterized in that: N<M; wherein, N is the dimension of the inner circumference of the support ring away from one end of the outer sleeve and the inner circumference of the support ring close to one end of the outer sleeve along the axial direction of the outer sleeve, and M is the dimension of the inner circumference of the support ring away from one end of the outer sleeve and the end of the bullet ring close to the support ring along the axial direction of the outer sleeve.

6. The bushing according to claim 1, characterized in that: The outer diameter of the abutting ring at a side away from the bullet-hitting ring gradually decreases along the first direction.

7. The bushing according to claim 1, characterized in that: The inner sleeve assembly includes an inner sleeve and a first convex ring; the inner circumference of the first convex ring is connected to the outer circumference of the inner sleeve; the outer diameter of the first convex ring is larger than the outer diameter of the inner sleeve; the inner circumference of the bullet ring is connected to the outer circumference of the inner sleeve and / or the outer circumference of the first convex ring; the inner circumference of the inner ring is connected to the outer circumference of the inner sleeve and / or the outer circumference of the first convex ring.

8. A swing arm, characterized in that: The swing arm includes a bushing according to any one of claims 1 to 7, and the swing arm further includes: Arm base assembly; The first arm assembly includes a first arm body and a first arm ring; one end of the first arm body is connected to the arm base assembly, and the other end is connected to the first arm ring.

9. A press-fitting system, characterized in that: The press-fitting system is used for press-fitting a swing arm as claimed in claim 8, and the press-fitting system comprises: The press-fitting assembly includes a press-fitting unit and a base unit; the press-fitting unit includes a press-fitting ring and a press-fitting head; the press-fitting ring is movably connected to the base unit; the press-fitting head is connected to the press-fitting ring; The pressing system includes a working state; the working state includes the arm seat assembly and / or the first arm assembly being detachably connected to the base unit, and the pressing head driving the abutment ring to move toward the first arm ring to an assembly completion state; the assembly completion state includes the outer peripheral wall of the sleeve assembly being connected to the inner peripheral wall of the first arm ring, and the ratio of the overlapping area of ​​the first projection area and the second projection area to the area of ​​the first projection area is greater than or equal to a set value; wherein, the first projection area is the projection area of ​​the bushing along the radial direction of the bushing; the second projection area is the projection area along the radial direction of the bushing with the first arm ring.

10. A press-fitting system according to claim 9, characterized in that: The inner diameter of the press-fitting head gradually decreases along the first direction.

11. A press-fitting method, characterized in that: The press-fitting method is applied to a press-fitting system according to any one of claims 9 to 10, and the press-fitting method comprises: Upon completion of positioning, the press-fitting head moves to abut against a side of the abutment ring away from the impact ring; wherein, the completion of positioning includes detachably connecting the arm base assembly and / or the first arm assembly to the base unit, abutting against a side of the first arm ring closer to the press-fitting head at an end of the outer sleeve away from the support ring; and coinciding with a central axis of the outer sleeve and a central axis of the first arm ring; The press-fitting head drives the abutment ring to deform and move along a second direction; wherein the second direction is the direction from the support ring to the outer sleeve; when the abutment ring is deformed, the portion of the abutment ring that moves toward the inner sleeve assembly is the first abutment portion, and the other portion of the abutment ring that moves away from the inner sleeve assembly is the second abutment portion; the radial dimension of the first abutment portion along the support ring is greater than the radial dimension of the second abutment portion along the support ring; Based on the swing arm being in the press-fitting completion state, the press-fitting head stops moving or moves along the first direction.

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