A swing arm assembly press fitting system and method

Abstract

The present application relates to the technical field of swing arm assembly, in particular to a swing arm assembly press fitting system and method. The support assembly comprises a support unit, a positioning unit and a guide unit. The press fitting assembly is in sliding connection with the support unit. The central axis of the press fitting assembly is collinear with the central axis of the guide unit. The swing arm assembly comprises a first arm unit and a bushing unit. The swing arm assembly press fitting system comprises a first initial state and a first working state. In the first initial state, the first arm ring is sleeved on the outer circumferential side of the guide unit. The first abutting portion abuts against the top surface of the positioning unit. The second abutting portion is spaced apart from the top surface of the positioning unit. The part of the positioning unit close to the first abutting portion is higher than the part of the positioning unit close to the second abutting portion. The first abutting portion is lower than the second abutting portion. The bushing unit is arranged at the top end of the first arm ring. The outer circumferential wall of the bushing unit partially abuts against the inner circumferential wall of the first arm ring. Thus, the problem of easy skewing during press fitting of the swing arm assembly is solved.

Description

Technical Field

[0001] This invention relates to the field of swing arm assembly technology, and more specifically, to a swing arm assembly press-fitting system and method. Background Technology

[0002] In the application of swing arm assemblies, bushings are usually fitted into the arm ring of the swing arm assembly. The bushing plays a dual role in this structure: on the one hand, it serves as a connecting medium to enable the arm ring to be effectively connected with other workpieces, ensuring the coordinated operation of the swing arm assembly and the external structure; on the other hand, the bushing has a shock absorption function, which can reduce the adverse effects of vibration on the swing arm assembly during operation.

[0003] During the handling and pressing of the swing arm assembly, the direct contact and relative movement between the swing arm assembly and the bushing pressing device can easily cause wear on the bushing pressing device. This wear can further lead to misalignment of the swing arm assembly during assembly. Furthermore, during the bushing pressing process, a positioning unit is used to position the swing arm assembly. The arm ring, fitted onto this unit, tends to tilt towards the arm body due to its own weight. This ultimately causes misalignment between the arm ring and the bushing during pressing, resulting in assembly difficulties. Summary of the Invention

[0004] To address the problem of easy skewing during the press-fitting of swing arm assemblies, this invention provides a swing arm assembly press-fitting system, comprising:

[0005] A support assembly includes a support unit, a positioning unit, and a guiding unit; the positioning unit is detachably connected to the support unit; the guiding unit is connected to the support unit; and the positioning unit is sleeved on the outer periphery of the guiding unit.

[0006] A pressing assembly is slidably connected to the support unit; the central axis of the pressing assembly is collinear with the central axis of the guide unit.

[0007] The swing arm assembly includes a first arm unit and a bushing unit; the first arm unit includes a first arm body and a first arm ring; the first arm ring is connected to one end of the first arm body; the outer diameter of the guide unit is smaller than the inner diameter of the first arm ring;

[0008] The swing arm assembly press-fitting system includes a first initial state and a first working state. In the first initial state, the first arm ring is sleeved on the outer periphery of the guide unit, a first abutting portion abuts against the top surface of the positioning unit, a second abutting portion is spaced apart from the top surface of the positioning unit, the portion of the positioning unit near the first abutting portion is higher than the portion near the second abutting portion, the first abutting portion is lower than the second abutting portion, and a bushing unit is disposed at the top of the first arm ring. The outer peripheral wall of the bushing unit abuts against the inner peripheral wall of the first arm ring. The first abutting portion is the part of the first arm ring near the positioning unit, and the second abutting portion is the part of the first arm ring away from the positioning unit. In the first working state, the pressing assembly drives the bushing unit to move until the contact area with the inner peripheral wall of the first arm ring gradually increases, and the contact area between the end face of the first arm ring and the top surface of the positioning unit gradually increases.

[0009] In some embodiments, the support component further includes a first limiting unit; the first limiting unit is connected to the support unit;

[0010] The first working state also includes the first arm being positioned within the enclosing space of the first limiting unit, wherein the first limiting unit restricts the first arm from rotating around the central axis of the positioning unit.

[0011] In some embodiments, the swing arm assembly further includes a second arm unit; the second arm unit includes a second arm body and a second arm ring; the second arm ring is connected to one end of the second arm body; the outer diameter of the guide unit is smaller than the inner diameter of the second arm ring;

[0012] The first initial state also includes a first reference line connecting the center position of the first arm body along the circumference of the guide unit and the central axis of the guide unit; the swing arm assembly press-fitting system also includes a second initial state and a second working state; the second initial state includes the second arm ring being sleeved on the outer periphery of the guide unit, the second arm body being disposed outside the enclosing space of the first limiting groove, the third abutting part abutting against the top surface of the positioning unit, the fourth abutting part being spaced apart from the top surface of the positioning unit, the portion of the positioning unit near the third abutting part being higher than the portion of the positioning unit near the fourth abutting part, the third abutting part... Below the fourth abutment portion, the line connecting the center position of the second arm body along the circumference of the guide unit and the central axis of the guide unit is the second reference line; the minimum included angle between the downward projection of the first reference line and the downward projection of the second reference line is within a set included angle range; the bushing unit is disposed at the top of the second arm ring, and the outer peripheral wall of the bushing unit abuts against the inner peripheral wall of the second arm ring; wherein, the third abutment portion is the part of the second arm ring near the positioning unit and close to the second arm unit, and the fourth abutment portion is the part of the second arm ring near the positioning unit and away from the second arm unit;

[0013] The second working state includes the pressing component driving the bushing unit to move until the contact area between the bushing unit and the inner peripheral wall of the second arm ring gradually increases, and the contact area between the second arm ring and the top surface of the positioning unit gradually increases.

[0014] In some embodiments, the minimum angle between the downward projection of the first reference line and the downward projection of the second reference line is less than 70°.

[0015] In some embodiments, the positioning unit includes a positioning base, a first positioning part, a second positioning part, a third positioning part, a fourth positioning part, and a guide hole; the positioning base is connected to the support unit; a portion of the guide hole extends from the top surface of the positioning base to the bottom surface of the positioning base; the first positioning part, the second positioning part, the third positioning part, and the fourth positioning part are respectively connected to the top surface of the positioning base; the first positioning part, the second positioning part, the third positioning part, and the fourth positioning part are sequentially arranged to abut against each other along the circumferential direction of the positioning base, thereby surrounding and forming another portion of the guide hole; the top end of the first positioning part is higher than the top end of the second positioning part, the top end of the third positioning part, and the top end of the fourth positioning part; the guiding unit is connected to the guide hole;

[0016] The first initial state also includes the first abutting part abutting against the portion of the top surface of the first positioning part near the second positioning part, wherein the first abutting part and the top surface of the third positioning part are spaced apart;

[0017] The second initial state also includes the third abutting part abutting against the portion of the first positioning part near the fourth positioning part, wherein the fourth abutting part and the third abutting part are spaced apart.

[0018] In some embodiments, the height of the top surface of the first positioning part, the height of the top surface of the second positioning part, and the height of the top surface of the third positioning part gradually decrease in sequence; the height of the top surface of the first positioning part, the height of the top surface of the fourth positioning part, and the height of the top surface of the third positioning part gradually decrease in sequence.

[0019] In some embodiments, the support component further includes a second limiting unit; the second limiting unit is connected to the support unit;

[0020] The second initial state also includes the second arm being positioned within the space enclosed by the second limiting unit, and the second limiting unit restricting the second arm from rotating around the central axis of the positioning unit.

[0021] In some embodiments, the guiding unit includes a guiding platform, a guiding post, and a first elastic portion; the guiding platform is connected to the positioning unit; one end of the first elastic portion is connected to the guiding platform, and the other end is connected to the guiding post; the outer peripheral wall of the guiding post is slidably connected to the inner peripheral wall of the guiding platform; the outer diameter of the guiding post is smaller than the inner diameter of the first arm ring.

[0022] The first initial state also includes the guide post being disposed at the top of the guide post; and the first arm being sleeved on the outer periphery of the guide post;

[0023] The first working state also includes the bushing unit and the guide post moving simultaneously toward the positioning unit.

[0024] In a second aspect, the present invention discloses a method for press-fitting a swing arm assembly, wherein the method is applied to any of the swing arm assembly press-fitting systems described in the first aspect, and the method further includes:

[0025] Based on the first arm unit moving to the first initial state, the pressing assembly moves to abut against the bushing unit;

[0026] The pressing assembly drives the bushing unit to move downward; wherein, during the process of the pressing assembly driving the bushing unit to move downward, the contact area between the first arm ring and the top surface of the positioning unit gradually increases;

[0027] Based on the fact that the contact area between the outer peripheral wall of the bushing unit and the inner peripheral wall of the first arm ring is greater than or equal to a first set value, the outer peripheral wall of the bushing unit and the first arm ring are press-fitted together.

[0028] In some embodiments, the support component further includes a first limiting unit; the first limiting unit is connected to the support unit;

[0029] The first initial state also includes a first reference line connecting the center position of the first arm body along the circumference of the guide unit and the central axis of the guide unit;

[0030] The swing arm assembly further includes a second arm unit; the second arm unit includes a second arm body and a second arm ring; the second arm ring is connected to one end of the second arm body; the outer diameter of the guide unit is smaller than the inner diameter of the second arm ring; the portion of the second arm ring near the positioning unit and close to the first arm unit is a third abutment portion, and the portion of the second arm ring near the positioning unit and away from the first arm unit is a fourth abutment portion.

[0031] The method for press-fitting the swing arm assembly further includes:

[0032] Once the outer peripheral wall of the bushing unit is press-fitted to the first arm ring, the first arm unit is removed.

[0033] Move the second arm unit to the second initial state;

[0034] The pressing assembly drives the bushing unit to move downward; wherein, during the process of the pressing assembly driving the bushing unit to move downward, the contact area between the second arm ring and the top surface of the positioning unit gradually increases;

[0035] Based on the fact that the contact area between the outer peripheral wall of the bushing unit and the inner peripheral wall of the second arm ring is greater than or equal to the second set value, the outer peripheral wall of the bushing unit and the second arm ring are press-fitted together.

[0036] To solve the problem of easy skewing during press-fitting of the swing arm assembly, the present invention has the following advantages:

[0037] By positioning units near the first abutment portion higher than those near the second abutment portion, when the swing arm assembly is in its first initial state, the first abutment portion can abut against the top surface of the positioning unit, and the second abutment portion can be spaced apart from the top surface of the positioning unit, with the first abutment portion lower than the second abutment portion. This height difference allows the swing arm assembly to maintain balance when it tilts towards the first abutment portion, preventing wear and tear on the positioning unit caused by long-term friction during the pick-up and put-down process. Simultaneously, in the first working state, the pressing assembly drives the bushing unit to move, gradually increasing the contact area between the end face of the first arm ring and the top surface of the positioning unit. This reduces skewness during the pressing process, ultimately solving the problems of workpiece wear on the device and skewness during pressing in the prior art, and ensuring the stability of the pressing process. Attached Figure Description

[0038] Figure 1A schematic diagram of a rocker arm assembly press-fitting system according to one embodiment is shown;

[0039] Figure 2 A partial first-view schematic diagram of a swing arm assembly press-fitting system according to an embodiment is shown;

[0040] Figure 3 A partial second-view schematic diagram of a swing arm assembly press-fitting system according to one embodiment is shown;

[0041] Figure 4 A partial third-view schematic diagram of a swing arm assembly press-fitting system according to an embodiment is shown;

[0042] Figure 5 A partial fourth-view schematic diagram of a swing arm assembly press-fitting system according to one embodiment is shown;

[0043] Figure 6 A schematic diagram of the structure of a swing arm assembly according to one embodiment is shown;

[0044] Figure 7 A schematic diagram of a bushing according to one embodiment is shown;

[0045] Figure 8 A partial fifth-view schematic diagram of a swing arm assembly press-fitting system according to one embodiment is shown.

[0046] Reference numerals: 10 Support assembly; 11 Support unit; 12 Positioning unit; 121 Positioning seat; 122 First positioning part; 123 Second positioning part; 124 Third positioning part; 125 Fourth positioning part; 126 Guide hole; 13 Guide unit; 131 Guide platform; 132 Guide post; 14 First limiting unit; 141 First limiting groove; 142 First limiting part; 143 First sensor; 15 Second limiting unit; 151 Second limiting groove; 152 Second limiting part; 153 Second sensor; 20 Pressing assembly; 21 Drive part; 22 Pressing head; 30 Swing arm assembly; 31 Arm seat unit; 32 Swing rod unit; 33 First arm unit; 331 First arm body; 332 First arm ring; 34 Second arm unit; 341 Second arm body; 342 Second arm ring; 35 Bushing unit; 351 Outer liner ring; 353 Second elastic part; 352 Inner liner ring. Detailed Implementation

[0047] 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.

[0048] 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.

[0049] During the press-fitting of the bushing in the swing arm assembly 30, a positioning unit 12 is set up to achieve the positioning of the swing arm assembly 30. The arm ring is sleeved on the positioning unit 12. Due to the influence of the weight of the swing arm assembly 30 itself, it will be tilted towards the arm body of the swing arm assembly 30, which will eventually cause the arm ring and the bushing to be misaligned during press-fitting, resulting in assembly difficulties.

[0050] Example 1: This example discloses a press-fitting system for a swing arm assembly 30, such as... Figure 1 As shown, the press-fitting system includes a support assembly 10, a pressing assembly 20, and a swing arm assembly 30.

[0051] Support component 10, such as Figure 4As shown, the system includes a support unit 11, a positioning unit 12, and a guide unit 13. The support unit 11 provides basic support for the entire system. The positioning unit 12 is used to position the swing arm assembly 30. The guide unit 13 guides the installation position of the swing arm assembly 30 and positions the bushing. The positioning unit 12 is detachably connected to the support unit 11, facilitating replacement and maintenance. The guide unit 13 is connected to the support unit 11, ensuring its fixed position and providing a stable reference for the installation of the swing arm assembly 30. The positioning unit 12 is fitted onto the outer periphery of the guide unit 13. This concentric arrangement of the positioning unit 12 and the guide unit 13 ensures coordinated positioning and guiding of the swing arm assembly 30.

[0052] The pressing assembly 20 is slidably connected to the support unit 11, allowing the pressing assembly 20 to move up and down along the support unit 11, providing a motion basis for the pressing action. The central axis of the pressing assembly 20 is collinear with the central axis of the guide unit 13, ensuring that the pressure applied by the pressing assembly 20 is along the axial direction of the guide unit 13. Furthermore, the pressing assembly 20 includes a driving part 21 and a pressing head 22, the driving part 21 being driven to the pressing head 22, and the driving part 21 driving the pressing head 22 downwards.

[0053] The swing arm assembly 30 includes a first arm unit 33 and a bushing unit 35. The bushing unit 35 serves to dampen vibrations during operation when the swing arm assembly 30 is connected to other components. The first arm unit 33 includes a first arm body 331 and a first arm ring 332. The first arm ring 332 is connected to one end of the first arm body 331. The outer diameter of the guide unit 13 is smaller than the inner diameter of the first arm ring 332, allowing the first arm ring 332 to be smoothly fitted onto the outer periphery of the guide unit 13.

[0054] Furthermore, such as Figure 6 As shown, the swing arm assembly 30 also includes an arm base unit 31 and a swing rod unit 32. The arm base unit 31 and the swing rod unit 32 are movably connected, allowing the swing rod unit 32 and the swing arm unit to rotate relative to each other. One end of the arm base unit 31 is fixedly connected to the first arm unit 33.

[0055] The swing arm assembly 30 press-fitting system includes a first initial state and a first working state. In the first initial state, a first arm ring 332 is fitted onto the outer periphery of the guide unit 13. A first abutting portion abuts against the top surface of the positioning unit 12, and a second abutting portion is spaced apart from the top surface of the positioning unit 12. That is, due to its own weight, the first arm ring 332 tilts towards the first arm body 331, causing the second abutting portion, away from the first arm body 331, to be spaced apart from the top surface of the positioning unit 12. The portion of the positioning unit 12 near the first abutting portion is higher than the portion near the second abutting portion, and the first abutting portion is lower than the second abutting portion. This height difference between the positioning units 12 balances the swing arm assembly 30, preventing it from tilting towards the first abutting portion. Simultaneously, the higher size of the portion of the positioning unit 12 near the first abutting portion reduces the problem of tilting of the swing arm assembly 30 caused by long-term contact wear between the first abutting portion and the positioning unit 12. The bushing unit 35 is disposed at the top of the first arm ring 332. At this time, the bottom of the bushing unit 35 also abuts against the top surface of the guide unit 13, so that the guide unit 13 can provide support for the bushing. The outer peripheral wall of the bushing unit 35 abuts against the inner peripheral wall of the first arm ring 332. The first abutting part is the part of the first arm ring 332 near the positioning unit 12 and close to the first arm unit 33, and the second abutting part is the part of the first arm ring 332 near the positioning unit 12 and away from the first arm unit 33. The first working state includes the pressing assembly 20 driving the bushing unit 35 to move until the contact area with the inner peripheral wall of the first arm ring 332 gradually increases, and the abutting area between the end face of the first arm ring 332 and the top surface of the positioning unit 12 gradually increases. During assembly, due to the weight of the swing arm assembly 30, the first arm ring 332 will tilt towards the first arm body 331. The guide unit 13 moves down simultaneously with the bushing unit 35, providing a certain support force for the bushing unit 35, so that the angle between the bushing unit 35 and the central axis of the first arm ring 332 is less than 15°. During the pressing process of the pressing assembly 20 driving the first arm ring 332 to tilt, the angle between the central axis of the bushing unit 35 and the central axis of the first arm ring 332 will increase, and the bushing unit 35 will move towards the first arm body 331. As the pressing process proceeds, the first arm ring 332 will gradually tilt away from the first arm body 331, causing the contact area between the end face of the first arm ring 332 and the top surface of the positioning unit 12 to gradually increase. Since the positioning unit 12 near the first contact portion is higher than the positioning unit 12 near the second contact portion, the first arm ring 332 can tilt towards the positioning unit 12 near the second contact portion, thereby gradually reducing the angle between the first arm ring 332 and the central axis of the bushing unit 35. This ensures the accuracy of the pressing position of the bushing unit 35 and the first arm ring 332, improves the stability of the pressing process, and solves the pressing tilt problem.

[0056] Furthermore, such as Figure 7As shown, the bushing unit 35 includes an outer bushing ring 351, a second elastic portion 353, and an inner bushing ring 352. The central axes of the outer bushing ring 351, the second elastic portion 353, and the outer bushing ring 351 are collinear. The outer bushing ring 351, the second elastic portion 353, and the outer bushing ring 351 are sequentially fixedly connected along a direction close to the central axis. The outer bushing ring 351 can be connected to the first arm ring 332 to realize the rotation of the first arm ring 332. The second elastic portion 353 can be made of elastic material to realize the shock absorption of the bushing unit 35 and the swing arm assembly 30. The inner bushing ring 352 can be connected to other components, thereby realizing the connection between the swing arm assembly 30 and other parts.

[0057] Furthermore, the support assembly 10 also includes a first limiting unit 14. The first limiting unit 14 is connected to the support unit 11. The first limiting unit 14 is an independent limiting structure, and its connection with the support unit 11 ensures that its position is fixed.

[0058] In some embodiments, such as Figure 1 As shown, the first limiting unit 14 includes a first limiting groove 141, a first limiting part 142, and a first sensor 143. The first limiting groove 141 is connected to the support unit 11, and the first limiting part 142 is also connected to the support unit 11. The first initial state also includes the first arm 331 being placed in the first limiting groove 141, and the second arm 341 abutting against the first limiting part 142. The first sensor 143 can acquire the placement state of the swing arm assembly 30.

[0059] like Figure 2 As shown, the first working state also includes the first arm body 331 being disposed within the enclosing space of the first limiting unit 14. The first limiting unit 14 restricts the first arm body 331 from rotating around the central axis of the positioning unit 12. By restricting the rotation of the first arm body 331, the first arm body 331 and the first arm ring 332 are prevented from rotating around the central axis of the guide unit 13 during press fitting. At the same time, it can prevent the insertion of the wrong type of first arm unit 33.

[0060] Furthermore, the swing arm assembly 30 also includes a second arm unit 34. The second arm unit 34 includes a second arm body 341 and a second arm ring 342. The second arm ring 342 is connected to one end of the second arm body 341. The outer diameter of the guide unit 13 is smaller than the inner diameter of the second arm ring 342, ensuring that the second arm ring 342 can be smoothly fitted onto the outer periphery of the guide unit 13.

[0061] The first initial state also includes a first reference line connecting the center position of the first arm body 331 along the circumference of the guide unit 13 and the central axis of the guide unit 13. The swing arm assembly 30 press-fitting system also includes a second initial state and a second working state. Figure 3As shown, the second initial state includes a second arm ring 342 sleeved on the outer periphery of the guide unit 13 to achieve initial positioning of the second arm unit 34. The second arm body 341 is positioned outside the enclosing space of the first limiting groove 141. The third abutment part abuts against the top surface of the positioning unit 12, and the fourth abutment part is spaced apart from the top surface of the positioning unit 12. The positioning unit 12 near the third abutment part is higher than the positioning unit 12 near the fourth abutment part, and the third abutment part is lower than the fourth abutment part. The height difference of the positioning units 12 balances the second arm assembly and prevents it from tilting. At the same time, the higher size of the positioning unit 12 near the third abutment part reduces the problem of tilting of the swing arm assembly 30 caused by long-term contact wear between the third abutment part and the positioning unit 12. The line connecting the center position of the second arm body 341 along the circumference of the guide unit 13 and the central axis of the guide unit 13 is the second reference line. The minimum angle between the downward projection of the first reference line and the downward projection of the second reference line is within the set angle range to avoid mutual interference when the two arm units are placed. The bushing unit 35 is located at the top of the second arm ring 342. The included angle can be set within 100°. If the included angle is set too large, the positioning unit 12 near the first abutment and the positioning unit 12 near the third abutment will affect each other when the bushing unit 35 is installed on the first arm ring 332 and the second arm ring 342. This will cause the arm ring to be unable to tilt slowly during the pressing process, thus preventing the bushing from being smoothly and correctly installed into the first arm ring 332 or the second arm ring 342.

[0062] The bushing unit 35 is disposed at the top of the second arm ring 342. The outer peripheral wall of the bushing unit 35 abuts against the inner peripheral wall of the second arm ring 342, providing an initial assembly basis for the press-fitting of the second arm unit 34. The third abutment portion is the part of the second arm ring 342 near the positioning unit 12 that is close to the second arm unit 34, and the fourth abutment portion is the part of the second arm ring 342 near the positioning unit 12 that is away from the second arm unit 34.

[0063] The second working state includes the pressing assembly 20 driving the bushing unit 35 to move until the contact area between the bushing unit 35 and the inner peripheral wall of the second arm ring 342 gradually increases, and the contact area between the second arm ring 342 and the top surface of the positioning unit 12 gradually increases, ensuring that the bushing unit 35 and the second arm ring 342 are firmly pressed together and improving the pressing stability.

[0064] Furthermore, the minimum angle between the downward projection of the first reference line and the downward projection of the second reference line is less than 70°. By limiting the angle to less than 70°, the positions of the top surface of the positioning unit 12 near the first and third abutment parts are closer, the positions of the top surface of the positioning unit 12 near the second and fourth abutment parts are closer, and the positions of the top surface of the positioning unit 12 near the first and third abutment parts and the positions of the top surface of the positioning unit 12 near the second and fourth abutment parts are further apart. At the same time, the positioning unit 12 can take into account the pressing requirements of the first arm unit 33 and the second arm unit 34.

[0065] Furthermore, such as Figure 8 As shown, the positioning unit 12 includes a positioning base 121, a first positioning part 122, a second positioning part 123, a third positioning part 124, a fourth positioning part 125, and a guide hole 126. The positioning base 121 is connected to the support unit 11. Figure 5 As shown, a portion of the guide hole 126 extends from the top surface of the positioning base 121 to the bottom surface of the positioning base 121, providing an installation channel for the guide unit 13. The first positioning part 122, the second positioning part 123, the third positioning part 124, and the fourth positioning part 125 are respectively connected to the top surface of the positioning base 121. The first positioning part 122, the second positioning part 123, the third positioning part 124, and the fourth positioning part 125 are sequentially arranged along the circumference of the positioning base 121, thereby surrounding and forming another portion of the guide hole 126, forming a complete guide hole 126 structure, which is adapted to the guide unit 13. The top of the first positioning part 122 is higher than the tops of the second positioning part 123, the third positioning part 124, and the fourth positioning part 125, respectively. This causes the position of the first arm unit 33 or the second arm unit 34 near the first positioning part 122 to be slightly raised during press-fitting. This reduces the impact of the first arm unit 33 or the second arm unit 34's own weight on the press-fitting process, making the press-fitting of the first arm unit 33 or the second arm unit 34 more stable. The guide unit 13 is connected to the guide hole 126.

[0066] The first initial state also includes the first abutting part abutting against the part of the top surface of the first positioning part 122 near the second positioning part 123. The first abutting part and the top surface of the third positioning part 124 are spaced apart to reduce the impact of the raising of the position of the first positioning part 122 on the third positioning part 124, thereby reducing the impact of the tilt caused by the weight of the first arm unit 33 on the pressing process, and making the first arm unit 33 more stable during pressing.

[0067] The second initial state also includes the third abutting part abutting the part of the first positioning part 122 near the fourth positioning part 125. The fourth abutting part and the third abutting part are spaced apart to reduce the impact of the raised position of the first positioning part 122 on the third positioning part 124, thereby overcoming the tilt caused by the weight of the first arm unit 33 and making the first arm unit 33 more stable during press-fitting.

[0068] Furthermore, the heights of the top surfaces of the first positioning part 122, the second positioning part 123, and the third positioning part 124 gradually decrease sequentially, making the process of increasing the contact area between the first or third abutting part and the top surface of the positioning unit 12 smoother and improving the stability of the pressing process. Similarly, the heights of the top surfaces of the first positioning part 122, the fourth positioning part 125, and the third positioning part 124 gradually decrease sequentially, making the process of increasing the contact area between the first or third abutting part and the top surface of the positioning unit 12 smoother and improving the stability of the pressing process.

[0069] Furthermore, the support assembly 10 also includes a second limiting unit 15. The second limiting unit 15 is connected to the support assembly 11.

[0070] In some embodiments, the second limiting unit 15 includes a second limiting groove 151, a second limiting portion 152, and a second sensor 153. The second limiting groove 151 is connected to the support unit 11, and the second limiting portion 152 is also connected to the support unit 11. The second initial state further includes the second arm 341 being placed in the second limiting groove 151, and the first arm 331 abutting against the second limiting portion 152. The second sensor 153 can acquire the placement state of the swing arm assembly 30.

[0071] The second initial state also includes the second arm body 341 being positioned within the space enclosed by the second limiting unit 15. The second limiting unit 15 restricts the second arm body 341 from rotating around the central axis of the positioning unit 12. By restricting the rotation of the second arm body 341, the second arm body 341 and the second arm ring 342 are prevented from rotating around the central axis of the guide unit 13 during press-fitting, thus ensuring the stable press-fitting of the second arm unit 34.

[0072] Furthermore, such as Figure 4As shown, the guiding unit 13 includes a guiding platform 131, a guiding post 132, and a first elastic part. The guiding platform 131 is connected to the positioning unit 12. One end of the first elastic part is connected to the guiding platform 131, and the other end is connected to the guiding post 132, allowing the guiding post 132 to move along its own axis. The outer peripheral wall of the guiding post 132 is slidably connected to the inner peripheral wall of the guiding platform 131. The outer diameter of the guiding post 132 is smaller than the inner diameter of the first arm ring 332. Before the bushing unit 35 is pressed in, the first arm ring 332 is fitted onto the outer peripheral side of the guiding post 132. At this time, the bushing can be placed on the top surface of the guiding post 132, and the outer peripheral surface of the bushing unit 35 partially abuts against the inner peripheral surface of the first arm ring 332. The guiding unit 13 moves down simultaneously with the bushing unit 35, providing a certain supporting force for the bushing unit 35, so that the angle between the bushing unit 35 and the central axis of the first arm ring 332 is less than 15°, making the pressing smoother.

[0073] The first initial state also includes a guide post 132 disposed at the top of the guide post 132. The first arm 331 is sleeved on the outer periphery of the guide post 132 to provide initial guidance and positioning for the first arm unit 33.

[0074] The first working state also includes the bushing unit 35 and the guide column 132 moving simultaneously toward the positioning unit 12, so that the guide column 132 moves synchronously with the bushing unit 35, ensuring that the guiding effect continues to be effective during the pressing process.

[0075] Example 2: This example discloses a press-fitting method for a swing arm assembly 30. The press-fitting method is applied to any of the swing arm assembly 30 press-fitting systems in Example 1. The press-fitting method includes steps S10 to S30, each step of which is described in detail below:

[0076] In step S10, based on the first arm unit 33 moving to the first initial state, the pressing assembly 20 moves to abut against the bushing unit 35 to prepare for pressing and ensure that the pressing assembly 20 and the bushing unit 35 make accurate contact.

[0077] In step S20, as the pressing assembly 20 moves to abut against the bushing unit 35, the pressing assembly 20 drives the bushing unit 35 to move downward. During this downward movement, the contact area between the first arm ring 332 and the top surface of the positioning unit 12 gradually increases. During assembly, due to the weight of the swing arm assembly 30, the first arm ring 332 tilts towards the first arm body 331. The guide unit 13 moves downward simultaneously with the bushing unit 35, providing support to the bushing unit 35, ensuring that the angle between the bushing unit 35 and the central axis of the first arm ring 332 is less than 15°. As the pressing assembly 20 drives the tilted first arm ring 332 to press, the angle between the central axis of the bushing unit 35 and the central axis of the first arm ring 332 increases, causing the bushing unit 35 to move towards the first arm body 331. As the pressing process proceeds, the first arm ring 332 gradually tilts away from the first arm body 331, causing the contact area between the end face of the first arm ring 332 and the top surface of the positioning unit 12 to gradually increase. Since the positioning unit 12 near the first contact portion is higher than the positioning unit 12 near the second contact portion, the first arm ring 332 can tilt towards the positioning unit 12 near the second contact portion. This causes the angle between the first arm ring 332 and the central axis of the bushing unit 35 to gradually decrease, ensuring the accuracy of the pressing position of the bushing unit 35 and the first arm ring 332, while improving the stability of the pressing process and solving the pressing tilt problem. In step S30, based on the contact area between the outer peripheral wall of the bushing unit 35 and the inner peripheral wall of the first arm ring 332 being greater than or equal to a first set value, the pressing of the outer peripheral wall of the bushing unit 35 and the first arm ring 332 is completed.

[0078] Furthermore, the support assembly 10 also includes a first limiting unit 14. The first limiting unit 14 is connected to the support unit 11, providing a limiting basis for the first arm unit 33 and ensuring stable limiting action.

[0079] The first initial state also includes the first reference line being the line connecting the center position of the first arm body 331 along the circumference of the guide unit 13 and the central axis of the guide unit 13.

[0080] The swing arm assembly 30 also includes a second arm unit 34. The second arm unit 34 includes a second arm body 341 and a second arm ring 342. The second arm ring 342 is connected to one end of the second arm body 341. The outer diameter of the guide unit 13 is smaller than the inner diameter of the second arm ring 342, which facilitates the fitting of the second arm ring 342. The portion of the second arm ring 342 near the positioning unit 12 and close to the first arm unit 33 is the third abutment portion, and the portion of the second arm ring 342 near the positioning unit 12 and away from the first arm unit 33 is the fourth abutment portion.

[0081] The press-fitting method for the swing arm assembly 30 also includes steps S40 to S80, with steps S10 to S30 and steps S40 to S80 executed sequentially. Steps S40 to S80 are described in detail below:

[0082] In step S40, based on the completion of the press-fitting of the outer peripheral wall of the bushing unit 35 with the first arm ring 332, the first arm unit 33 is removed. After the press-fitting of the first arm unit 33 is completed, it is removed to make room for the press-fitting of the second arm unit 34.

[0083] In step S50, based on the removal of the first arm unit 33, the second arm unit 34 is moved to the second initial state to prepare for the press-fitting of the second arm unit 34.

[0084] In step S60, based on the second arm unit 34 moving to the second initial state, the pressing assembly 20 drives the bushing unit 35 to move downwards. During this downward movement, the contact area between the second arm ring 342 and the top surface of the positioning unit 12 gradually increases. During assembly, due to the weight of the swing arm assembly 30, the second arm ring 342 tilts towards the second arm body 341. The guide unit 13 moves downwards simultaneously with the bushing unit 35, providing support to the bushing unit 35, ensuring that the angle between the bushing unit 35 and the central axis of the second arm ring 342 is less than 15°. As the pressing assembly 20 presses the tilted second arm ring 342, the angle between the central axis of the bushing unit 35 and the central axis of the second arm ring 342 increases, causing the bushing unit 35 to move towards the second arm body 341. As the pressing process proceeds, the second arm ring 342 will gradually tilt away from the second arm body 341, causing the contact area between the end face of the second arm ring 342 and the top surface of the positioning unit 12 to gradually increase. Since the positioning unit 12 near the second contact portion is higher than the positioning unit 12 near the second contact portion, the second arm ring 342 can tilt towards the positioning unit 12 near the second contact portion, thereby gradually reducing the angle between the second arm ring 342 and the central axis of the bushing unit 35. This ensures the accuracy of the pressing position of the bushing unit 35 and the second arm ring 342, improves the stability of the pressing process, and solves the pressing tilt problem.

[0085] In step S70, the bushing unit 35 outer peripheral wall and the second arm ring 342 inner peripheral wall abutting area is greater than or equal to the second set value (such as 90% of the area of ​​the inner peripheral wall of the second arm ring 342), and the bushing unit 35 outer peripheral wall and the second arm ring 342 are press-fitted.

[0086] 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 rocker arm assembly press-fitting system, characterized in that, The swing arm assembly press-fitting system includes: A support assembly includes a support unit, a positioning unit, and a guide unit; the positioning unit is detachably connected to the support unit; the guide unit is connected to the support unit; the positioning unit is sleeved on the outer periphery of the guide unit; the positioning unit includes a positioning seat, a first positioning part, a second positioning part, a third positioning part, a fourth positioning part, and a guide hole; the positioning seat is connected to the support unit; part of the guide hole extends from the top surface of the positioning seat to the bottom surface of the positioning seat; the first positioning part, the second positioning part, the third positioning part, and the fourth positioning part are respectively connected to the top surface of the positioning seat; the first positioning part, the second positioning part, the third positioning part, and the fourth positioning part are sequentially arranged to abut against each other along the circumferential direction of the positioning seat, thereby surrounding it. Another guide hole is formed; the top of the first positioning part is higher than the top of the second positioning part, the top of the third positioning part, and the top of the fourth positioning part, respectively; the guide unit is connected to the guide hole; the support assembly also includes a first limiting unit; the first limiting unit includes a first limiting groove, a first limiting part, and a first sensor; the first limiting groove is connected to the support unit, and the first limiting part is connected to the support unit; the first sensor can obtain the placement state of the swing arm assembly; the support assembly also includes a second limiting unit; the second limiting unit includes a second limiting groove, a second limiting part, and a second sensor; the second limiting groove is connected to the support unit, and the second limiting part is connected to the support unit; the second sensor can obtain the placement state of the swing arm assembly; A pressing assembly is slidably connected to the support unit; the central axis of the pressing assembly is collinear with the central axis of the guide unit. The swing arm assembly includes a first arm unit and a bushing unit; the first arm unit includes a first arm body and a first arm ring; the first arm ring is connected to one end of the first arm body; the outer diameter of the guide unit is smaller than the inner diameter of the first arm ring; The swing arm assembly press-fitting system includes a first initial state and a first working state. In the first initial state, the first arm ring is sleeved on the outer periphery of the guide unit, a first abutting portion abuts against the top surface of the positioning unit, a second abutting portion is spaced apart from the top surface of the positioning unit, the portion of the positioning unit near the first abutting portion is higher than the portion near the second abutting portion, the first abutting portion is lower than the second abutting portion, and a bushing unit is disposed at the top of the first arm ring. The outer peripheral wall of the bushing unit abuts against the inner peripheral wall of the first arm ring. The first abutting portion is the part of the first arm ring near the positioning unit, and the second abutting portion is the part of the first arm ring away from the positioning unit. In the first working state, the pressing assembly drives the bushing unit to move until the contact area with the inner peripheral wall of the first arm ring gradually increases, and the contact area between the end face of the first arm ring and the top surface of the positioning unit gradually increases.

2. The swing arm assembly press-fitting system according to claim 1, characterized in that, The support assembly further includes a first limiting unit; the first limiting unit is connected to the support unit; The first working state also includes the first arm being positioned within the enclosing space of the first limiting unit, wherein the first limiting unit restricts the first arm from rotating around the central axis of the positioning unit.

3. The swing arm assembly press-fitting system according to claim 2, characterized in that, The swing arm assembly further includes a second arm unit; the second arm unit includes a second arm body and a second arm ring; the second arm ring is connected to one end of the second arm body; the outer diameter of the guide unit is smaller than the inner diameter of the second arm ring; The first initial state also includes a first reference line connecting the center position of the first arm body along the circumference of the guide unit and the central axis of the guide unit; the swing arm assembly press-fitting system also includes a second initial state and a second working state; the second initial state includes the second arm ring being sleeved on the outer periphery of the guide unit, the second arm body being disposed outside the enclosing space of the first limiting groove, the third abutting part abutting against the top surface of the positioning unit, the fourth abutting part being spaced apart from the top surface of the positioning unit, the portion of the positioning unit near the third abutting part being higher than the portion of the positioning unit near the fourth abutting part, the third abutting part... Below the fourth abutment portion, the line connecting the center position of the second arm body along the circumference of the guide unit and the central axis of the guide unit is the second reference line; the minimum included angle between the downward projection of the first reference line and the downward projection of the second reference line is within a set included angle range; the bushing unit is disposed at the top of the second arm ring, and the outer peripheral wall of the bushing unit abuts against the inner peripheral wall of the second arm ring; wherein, the third abutment portion is the part of the second arm ring near the positioning unit and close to the second arm unit, and the fourth abutment portion is the part of the second arm ring near the positioning unit and away from the second arm unit; The second working state includes the pressing component driving the bushing unit to move until the contact area between the bushing unit and the inner peripheral wall of the second arm ring gradually increases, and the contact area between the second arm ring and the top surface of the positioning unit gradually increases.

4. The swing arm assembly press-fitting system according to claim 3, characterized in that, The minimum angle between the downward projection of the first reference line and the downward projection of the second reference line is less than 70°.

5. The swing arm assembly press-fitting system according to claim 3, characterized in that, The first initial state also includes the first abutting part abutting against the portion of the top surface of the first positioning part near the second positioning part, wherein the first abutting part and the top surface of the third positioning part are spaced apart; The second initial state also includes the third abutting part abutting against the portion of the first positioning part near the fourth positioning part, wherein the fourth abutting part and the third abutting part are spaced apart.

6. The swing arm assembly press-fitting system according to claim 5, characterized in that, The height of the top surface of the first positioning part, the height of the top surface of the second positioning part, and the height of the top surface of the third positioning part gradually decrease in sequence; the height of the top surface of the first positioning part, the height of the top surface of the fourth positioning part, and the height of the top surface of the third positioning part gradually decrease in sequence.

7. The swing arm assembly press-fitting system according to claim 3, characterized in that, The support assembly further includes a second limiting unit; the second limiting unit is connected to the support unit; The second initial state also includes the second arm being positioned within the space enclosed by the second limiting unit, and the second limiting unit restricting the second arm from rotating around the central axis of the positioning unit.

8. The swing arm assembly press-fitting system according to claim 1, characterized in that, The guiding unit includes a guiding platform, a guiding post, and a first elastic part; the guiding platform is connected to the positioning unit; one end of the first elastic part is connected to the guiding platform, and the other end is connected to the guiding post; the outer peripheral wall of the guiding post is slidably connected to the inner peripheral wall of the guiding platform; the outer diameter of the guiding post is smaller than the inner diameter of the first arm ring. The first initial state also includes the guide post being disposed at the top of the guide post; and the first arm being sleeved on the outer periphery of the guide post; The first working state also includes the bushing unit and the guide post moving simultaneously toward the positioning unit.

9. A method for press-fitting a swing arm assembly, characterized in that, The swing arm assembly press-fitting method is applied to a swing arm assembly press-fitting system according to any one of claims 1 to 8, and the swing arm assembly press-fitting method includes: Based on the first arm unit moving to the first initial state, the pressing assembly moves to abut against the bushing unit; The pressing assembly drives the bushing unit to move downward; wherein, during the process of the pressing assembly driving the bushing unit to move downward, the contact area between the first arm ring and the top surface of the positioning unit gradually increases; Based on the fact that the contact area between the outer peripheral wall of the bushing unit and the inner peripheral wall of the first arm ring is greater than or equal to a first set value, the outer peripheral wall of the bushing unit and the first arm ring are press-fitted together.

10. A method for press-fitting a swing arm assembly according to claim 9, characterized in that, The support assembly further includes a first limiting unit; the first limiting unit is connected to the support unit; The first initial state also includes a first reference line connecting the center position of the first arm body along the circumference of the guide unit and the central axis of the guide unit; The swing arm assembly further includes a second arm unit; the second arm unit includes a second arm body and a second arm ring; the second arm ring is connected to one end of the second arm body; the outer diameter of the guide unit is smaller than the inner diameter of the second arm ring; the portion of the second arm ring near the positioning unit and close to the first arm unit is a third abutment portion, and the portion of the second arm ring near the positioning unit and away from the first arm unit is a fourth abutment portion. The method for press-fitting the swing arm assembly further includes: Once the outer peripheral wall of the bushing unit is press-fitted to the first arm ring, the first arm unit is removed. Move the second arm unit to the second initial state; The pressing assembly drives the bushing unit to move downward; wherein, during the process of the pressing assembly driving the bushing unit to move downward, the contact area between the second arm ring and the top surface of the positioning unit gradually increases; Based on the fact that the contact area between the outer peripheral wall of the bushing unit and the inner peripheral wall of the second arm ring is greater than or equal to the second set value, the outer peripheral wall of the bushing unit and the second arm ring are press-fitted together.

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