Swing arm assembly press-fitting system and method

Abstract

The invention relates to the technical field of swing arm assembly, in particular to a swing arm assembly press-fitting system and method. The supporting assembly comprises a supporting unit, a positioning unit and a guiding unit; the pressing assembly is in sliding connection with the supporting unit; the central axis of the pressing assembly and the central axis of the guiding unit are collinear. 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 peripheral side of the guiding unit is sleeved with the first armlet, the first abutting part abuts against the top face of the positioning unit, the second abutting part and the top face of the positioning unit are arranged in a spaced mode, the part, close to the first abutting part, of the positioning unit is higher than the part, close to the second abutting part, of the positioning unit, and the first abutting part is lower than the second abutting part. The bushing unit is arranged at the top end of the first armlet, and the outer peripheral wall of the bushing unit is partially abutted against the inner peripheral wall of the first armlet; in this way, the problem that the swing arm assembly is prone to skewing during press fitting is solved.

Description

Technical Field

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

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

[0003] During the removal, placement, and press-fitting of the swing arm assembly, direct contact and relative motion between the swing arm assembly and the bushing press-fitting device can easily cause wear on the bushing press-fitting device. This wear can further lead to skew in the swing arm assembly during assembly. Furthermore, during the bushing press-fitting process, a positioning unit is provided to position the swing arm assembly. The arm ring fits onto the positioning unit. Due to the weight of the swing arm assembly, it can tilt toward the arm body. This ultimately causes skew between the arm ring and bushing during press-fitting, making assembly difficult. Summary of the Invention

[0004] In order to solve the problem that the swing arm assembly is easily skewed during press-fitting, the present invention provides a swing arm assembly press-fitting system, comprising: The 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; and the positioning unit is sleeved on the outer periphery of the guide unit. a pressing assembly, the pressing assembly being slidably connected to the supporting unit; a central axis of the pressing assembly being collinear with a central axis of the guiding 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 pressing system includes a first initial state and a first working state; the first initial state includes the first arm ring being sleeved on the outer peripheral side of the guide unit, the first abutting portion abutting against the top surface of the positioning unit, and the second abutting portion being spaced apart from the top surface of the positioning unit, the part of the positioning unit close to the first abutting portion being higher than the part of the positioning unit close to the second abutting portion, and the first abutting portion being lower than the second abutting portion, and the bushing unit being arranged at the top end of the first arm ring, and the outer peripheral wall of the bushing unit abutting against the inner peripheral wall portion of the first arm ring; wherein, the first abutting portion is the part of the first arm ring close to one end of the positioning unit close to the first arm unit, and the second abutting portion is the part of the first arm ring close to one end of the positioning unit away from the first arm unit; the first working state includes the pressing assembly driving the bushing unit to move until the contact area with the inner peripheral wall of the first arm ring gradually increases, and the abutment area between the end face of the first arm ring and the top surface of the positioning unit gradually increases.

[0005] In some embodiments, 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 arranged in a space surrounded by the first limiting unit, and the first limiting unit limiting the first arm from rotating around the central axis of the positioning unit.

[0006] 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; The first initial state also includes a 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 as a first reference line; 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 peripheral side of the guide unit, the second arm body being arranged outside the enclosed space of the first limiting groove, the third abutting portion abutting against the top surface of the positioning unit, the fourth abutting portion being spaced apart from the top surface of the positioning unit, the portion of the positioning unit close to the third abutting portion being higher than the portion of the positioning unit close to the fourth abutting portion, and the third abutting portion Below the fourth abutment portion, a 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 a 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 a set angle range, the bushing unit is arranged at the top end 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 a portion of the second arm ring close to one end of the positioning unit close to the second arm unit, and the fourth abutment portion is a portion of the second arm ring close to one end of the positioning unit away from the second arm unit; The second working state includes the pressing assembly driving the bushing unit to move until the contact area with 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.

[0007] 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°.

[0008] In some embodiments, the positioning unit includes a positioning seat, a first positioning portion, a second positioning portion, a third positioning portion, a fourth positioning portion, and a guide hole; the positioning seat is connected to the support unit; part of the guide hole passes through the top surface of the positioning seat to the bottom surface of the positioning seat; the first positioning portion, the second positioning portion, the third positioning portion, and the fourth positioning portion are respectively connected to the top surface of the positioning seat; the first positioning portion, the second positioning portion, the third positioning portion, and the fourth positioning portion are sequentially abutted along the circumferential direction of the positioning seat, thereby surrounding and forming another part of the guide hole; the top end of the first positioning portion is respectively higher than the top end of the second positioning portion, the top end of the third positioning portion, and the top end of the fourth positioning portion; the guide unit is connected to the guide hole; The first initial state further includes the first abutting portion abutting against a portion of the top surface of the first positioning portion close to the second positioning portion, and the first abutting portion is spaced apart from the top surface of the third positioning portion; The second initial state further includes the third abutting portion abutting against a portion of the first positioning portion close to the fourth positioning portion, and the fourth abutting portion is spaced apart from the third abutting portion.

[0009] In some embodiments, the height of the top surface of the first positioning portion, the height of the top surface of the second positioning portion, and the height of the top surface of the third positioning portion gradually decrease in sequence; the height of the top surface of the first positioning portion, the height of the top surface of the fourth positioning portion, and the height of the top surface of the third positioning portion gradually decrease in sequence.

[0010] In some embodiments, the support assembly further includes a second limiting unit; the second limiting unit is connected to the support unit; The second initial state further includes the second arm being disposed in a space surrounded by the second limiting unit, and the second limiting unit limiting the second arm from rotating around the central axis of the positioning unit.

[0011] In some embodiments, the guide unit includes a guide platform, a guide column, and a first elastic portion; the guide platform is connected to the positioning unit; one end of the first elastic portion is connected to the guide platform, and the other end is connected to the guide column; the outer peripheral wall of the guide column is slidably connected to the inner peripheral wall of the guide platform; the outer diameter of the guide column is smaller than the inner diameter of the first arm ring; The first initial state further includes the guide post being arranged at the top end of the guide post; 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 column moving toward the positioning unit simultaneously.

[0012] In a second aspect, the present invention discloses a swing arm assembly press-assembly method, which is applied to any swing arm assembly press-assembly system described in the first aspect, and further includes: Based on the first arm unit moving to the first initial state, the press-fit 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.

[0013] In some embodiments, the support assembly further includes a first limiting unit; the first limiting unit is connected to the support unit; The first initial state further includes a line connecting the center position of the first arm along the circumference of the guide unit and the central axis of the guide unit as a first reference line; 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; a portion of the second arm ring close to the positioning unit and close to the first arm unit is a third abutment portion, and a portion of the second arm ring close to the positioning unit and away from the first arm unit is a fourth abutment portion; The swing arm assembly press-fitting method further comprises: After the outer peripheral wall of the bushing unit and the first arm ring are press-fitted, the first arm unit is removed; moving the second arm unit to a 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.

[0014] In order to solve the problem that the swing arm assembly is easily skewed during press assembly, the present invention has the following advantages: By making the part of the positioning unit close to the first abutting portion higher than the part of the positioning unit close to the second abutting portion, when the swing arm assembly is in the first initial state, the first abutting portion can abut against the top surface of the positioning unit, and the second abutting portion can be spaced apart from the top surface of the positioning unit, and the first abutting portion can be lower than the second abutting portion. Therefore, when the swing arm assembly is skewed toward the first abutting portion, the height difference is used to achieve the balance of the swing arm assembly, avoiding the wear of the positioning unit due to long-term friction during the picking and placing process; at the same time, in the first working state, the pressing assembly drives the bushing unit to move, so that the abutting area between the end face of the first arm ring and the top surface of the positioning unit gradually increases, which can reduce the deflection during the pressing process, and finally solve the problem of wear of the workpiece on the device and deflection during pressing in the prior art, and ensure the stability of the pressing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a swing arm assembly press-fitting system according to an embodiment is shown; Figure 2 A partial first-view schematic diagram of a swing arm assembly press-fitting system according to an embodiment is shown; Figure 3 A partial second perspective schematic diagram of a swing arm assembly press-fitting system according to an embodiment is shown; Figure 4A partial third-view schematic diagram of a swing arm assembly press-fitting system according to an embodiment is shown; Figure 5 A partial fourth perspective schematic diagram of a swing arm assembly press-fitting system according to an embodiment is shown; Figure 6 A schematic structural diagram of a swing arm assembly according to an embodiment is shown; Figure 7 A schematic diagram of a bushing according to an embodiment is shown; Figure 8 A partial fifth-view schematic diagram of a swing arm assembly press-fitting system according to an embodiment is shown.

[0016] Figure markings: 10 supporting assembly; 11 supporting unit; 12 positioning unit; 121 positioning seat; 122 first positioning portion; 123 second positioning portion; 124 third positioning portion; 125 fourth positioning portion; 126 guide hole; 13 guiding unit; 131 guiding platform; 132 guiding column; 14 first limiting unit; 141 first limiting groove; 142 first limiting portion; 143 first sensor; 15 second limiting unit; 151 second limiting groove; 152 second limiting portion; 153 second sensor; 20 pressing assembly; 21 driving portion; 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 bushing; 353 second elastic portion; 352 inner bushing. DETAILED DESCRIPTION

[0017] 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.

[0018] 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 a direct connection, an indirect connection through an intermediate medium, or 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 or quantity of the indicated devices, elements, or components. Unless otherwise specified, "plurality" means two or more.

[0019] During the process of press-fitting the bushing of the swing arm assembly 30, a positioning unit 12 is provided to achieve the positioning of the swing arm assembly 30. The arm ring is mounted on the positioning unit 12. Affected by the weight of the swing arm assembly 30 itself, the arm ring will be tilted toward the arm body of the swing arm assembly 30, which will eventually cause the arm ring and the bushing to be skewed during press-fitting, making assembly difficult.

[0020] Example 1: This embodiment discloses a press-fit system for a swing arm assembly 30, such as Figure 1 As shown, the press-fitting system includes a support assembly 10 , a press-fit assembly 20 and a swing arm assembly 30 .

[0021] Support assembly 10, such as Figure 4As shown, it 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, and the guide unit 13 plays the role of guiding the installation position of the swing arm assembly 30 and positioning the bushing at the same time. The positioning unit 12 is detachably connected to the support unit 11, which is convenient for the replacement and maintenance of the positioning unit 12. The guide unit 13 is connected to the support unit 11 to ensure that the position of the guide unit 13 is fixed, providing a stable reference for the installation of the swing arm assembly 30. The positioning unit 12 is installed on the outer peripheral side of the guide unit 13. The concentric setting of the positioning unit 12 and the guide unit 13 is realized to ensure the coordinated positioning and guiding of the swing arm assembly 30.

[0022] The pressing assembly 20 is slidably connected to the support unit 11, enabling it to move up and down along the support unit 11, providing a motion foundation for the press-fitting operation. 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 axis of the guide unit 13. Furthermore, the pressing assembly 20 includes a driving unit 21 and a pressing head 22. The driving unit 21 is in driving connection with the pressing head 22, and the driving unit 21 can drive the pressing head 22 downward.

[0023] The swing arm assembly 30 includes a first arm unit 33 and a bushing unit 35. The bushing unit 35 serves to reduce vibration during the connection between the swing arm assembly 30 and 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 mounted on the outer periphery of the guide unit 13.

[0024] Furthermore, if 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 is movably connected to the swing rod unit 32 so that the swing rod unit 32 and the swing arm unit can rotate relative to each other. One end of the arm base unit 31 is fixedly connected to the first arm unit 33.

[0025] The press-fitting system of the swing arm assembly 30 includes a first initial state and a first working state. In the first initial state, the first arm ring 332 is sleeved on the outer peripheral side of the guide unit 13, the first abutting portion abuts against the top surface of the positioning unit 12, and the second abutting portion is spaced apart from the top surface of the positioning unit 12. That is, due to the influence of the first arm body 331's own weight, the first arm ring 332 will tilt toward the first arm body 331, so that the second abutting portion away from the first arm body 331 is 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 of the positioning unit 12 near the second abutting portion, and the first abutting portion is lower than the second abutting portion. The height difference of the positioning unit 12 balances the swing arm assembly 30 and prevents it from tilting toward the first abutting portion. At the same time, 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 arranged at the top end 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 portion of the first arm ring 332. Among them, the first abutting portion is the portion of the first arm ring 332 close to the end of the positioning unit 12 close to the first arm unit 33, and the second abutting portion is the portion of the first arm ring 332 close to the end of the positioning unit 12 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 abutment area between the end face of the first arm ring 332 and the top surface of the positioning unit 12 gradually increases. During the assembly process, due to the influence of the deadweight of the swing arm assembly 30, the first arm ring 332 will tilt toward the direction close to the first arm body 331, and the guide unit 13 will move downward at the same time as 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°. In the process of driving the pressing assembly 20 to press the inclined first arm ring 332, 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 toward the direction close to the first arm body 331. As the pressing proceeds, the first arm ring 332 will gradually tilt away from the first arm body 331, so that the abutment area between the end face of the first arm ring 332 and the top surface of the positioning unit 12 gradually increases. Since the part of the positioning unit 12 close to the first abutment portion is higher than the part of the positioning unit 12 close to the second abutment portion, the first arm ring 332 can tilt toward the part of the positioning unit 12 close to the second abutment portion, so that the angle between the first arm ring 332 and the central axis of the bushing unit 35 gradually decreases, 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 problem of press-fitting skew.

[0026] Furthermore, if Figure 7As shown, the bushing unit 35 includes an outer ring 351, a second elastic portion 353, and an inner ring 352. The central axes of the outer ring 351, the second elastic portion 353, and the outer ring 351 are collinear. The outer ring 351, the second elastic portion 353, and the outer ring 351 are fixedly connected in sequence along a direction close to the central axis. The outer ring 351 can be connected to the first arm ring 332 to enable rotation of the first arm ring 332. The second elastic portion 353 can be made of an elastic material to achieve shock absorption for the bushing unit 35 and the swing arm assembly 30. The inner ring 352 can be connected to other components, thereby enabling the swing arm assembly 30 to be connected to other components.

[0027] Furthermore, the support assembly 10 further 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 the connection with the support unit 11 can ensure that its position is fixed.

[0028] In some embodiments, as Figure 1 As shown, the first limiting unit 14 includes a first limiting slot 141, a first limiting portion 142, and a first sensor 143. The first limiting slot 141 is connected to the support unit 11, and the first limiting portion 142 is connected to the support unit 11. The first initial state also includes the first arm 331 being placed in the first limiting slot 141 and the second arm 341 abutting against the first limiting portion 142. The first sensor 143 can detect the placement state of the swing arm assembly 30.

[0029] like Figure 2 As shown, the first working state also includes the first arm body 331 being arranged in the enclosed space of the first limiting unit 14, and the first limiting unit 14 limiting the first arm body 331 from rotating around the central axis of the positioning unit 12. By limiting 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, and at the same time, the wrong model of the first arm unit 33 can be prevented from being inserted.

[0030] 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 mounted on the outer periphery of the guide unit 13.

[0031] The first initial state also includes 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 as the first reference line. 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 the second arm ring 342 sleeved around the outer periphery of the guide unit 13, achieving preliminary positioning of the second arm unit 34. The second arm body 341 is positioned outside the space enclosed by the first limiting groove 141. The third abutment portion abuts the top surface of the positioning unit 12, and the fourth abutment portion is spaced apart from the top surface of the positioning unit 12. The portion of the positioning unit 12 near the third abutment portion is higher than the portion of the positioning unit 12 near the fourth abutment portion, and the third abutment portion is lower than the fourth abutment portion. This height difference in the positioning unit 12 balances the second arm assembly and prevents it from skewing. The higher size of the portion of the positioning unit 12 near the third abutment portion reduces the risk of skewing of the swing arm assembly 30 caused by long-term contact wear between the third abutment portion 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 serves as 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 a set angle range to prevent interference between the two arm units during placement. The bushing unit 35 is arranged at the top end of the second arm ring 342, and the setting angle range can be within 100°. If the setting angle range is too large, when the bushing unit 35 is installed on the first arm ring 332 and the second arm ring 342, the positioning unit 12 close to the first abutting part and the positioning unit 12 close to the third abutting part will affect each other, resulting in the arm ring being unable to slowly tilt during the pressing process, thereby making it impossible for the bushing to be smoothly and correctly installed in the first arm ring 332 or the second arm ring 342.

[0032] The bushing unit 35 is disposed at the top of the second arm ring 342. The outer peripheral wall of the bushing unit 35 partially abuts the inner peripheral wall of the second arm ring 342, providing an initial assembly foundation for the press-fitting of the second arm unit 34. The third abutment portion is the portion of the second arm ring 342 near the positioning unit 12, which is close to the second arm unit 34. The fourth abutment portion is the portion of the second arm ring 342 near the positioning unit 12, which is away from the second arm unit 34.

[0033] The second working state includes the pressing assembly 20 driving the bushing unit 35 to move until the contact area with the inner 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, thereby improving the pressing stability.

[0034] Furthermore, the minimum angle between the downward projection of the first datum line and the downward projection of the second datum line is less than 70°. By limiting the angle to less than 70°, the top surface of the positioning unit 12 is close to the first abutment portion and the third abutment portion, the top surface of the positioning unit 12 is close to the second abutment portion and the fourth abutment portion, and the top surface of the positioning unit 12 is close to the first abutment portion and the third abutment portion and the top surface of the positioning unit 12 is far away from the second abutment portion and the fourth abutment portion. At the same time, the positioning unit 12 can take into account the press-fitting requirements of the first arm unit 33 and the second arm unit 34.

[0035] Furthermore, if Figure 8 As shown, the positioning unit 12 includes a positioning seat 121, a first positioning portion 122, a second positioning portion 123, a third positioning portion 124, a fourth positioning portion 125, and a guide hole 126. The positioning seat 121 is connected to the supporting unit 11. Figure 5 As shown, a portion of the guide hole 126 extends from the top surface of the positioning seat 121 to the bottom surface of the positioning seat 121, providing a mounting channel for the guide unit 13. The first positioning portion 122, the second positioning portion 123, the third positioning portion 124, and the fourth positioning portion 125 are respectively connected to the top surface of the positioning seat 121. The first positioning portion 122, the second positioning portion 123, the third positioning portion 124, and the fourth positioning portion 125 are sequentially abutted along the circumference of the positioning seat 121, thereby surrounding another portion of the guide hole 126, forming a complete guide hole 126 structure adapted for the guide unit 13. The top of the first positioning portion 122 is higher than the top of the second positioning portion 123, the top of the third positioning portion 124, and the top of the fourth positioning portion 125, respectively. This allows the first arm unit 33 or the second arm unit 34 to be slightly raised near the first positioning portion 122 during press-fitting. This reduces the effect of the weight of the first arm unit 33 or the second arm unit 34 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.

[0036] The first initial state also includes the first abutting portion abutting against the portion of the top surface of the first positioning portion 122 close to the second positioning portion 123, and the first abutting portion is spaced apart from the top surface of the third positioning portion 124, thereby reducing the influence of the raised position of the first positioning portion 122 on the third positioning portion 124, thereby reducing the influence of the skewness caused by the deadweight of the first arm unit 33 on the pressing process, and making the first arm unit 33 more stable during press-fitting.

[0037] The second initial state also includes the third abutting portion abutting against the part of the first positioning portion 122 close to the fourth positioning portion 125. The fourth abutting portion and the third abutting portion are spaced apart to reduce the influence of the raised position of the first positioning portion 122 on the third positioning portion 124, thereby overcoming the skewness caused by the self-weight of the first arm unit 33 and making the first arm unit 33 more stable when pressed.

[0038] Furthermore, the heights of the top surfaces of the first positioning portion 122, the second positioning portion 123, and the third positioning portion 124 are gradually reduced in sequence, making the process of increasing the contact area between the first or third abutting portion and the top surface of the positioning unit 12 smoother, thereby improving the stability of the press-fitting process. The heights of the top surfaces of the first positioning portion 122, the fourth positioning portion 125, and the third positioning portion 124 are gradually reduced in sequence, making the process of increasing the contact area between the first or third abutting portion and the top surface of the positioning unit 12 smoother, thereby improving the stability of the press-fitting process.

[0039] Furthermore, the support assembly 10 further includes a second limiting unit 15 . The second limiting unit 15 is connected to the support unit 11 .

[0040] In some embodiments, the second limiting unit 15 includes a second limiting slot 151, a second limiting portion 152, and a second sensor 153. The second limiting slot 151 is connected to the support unit 11, and the second limiting portion 152 is connected to the support unit 11. The second initial state also includes the second arm 341 being placed in the second limiting slot 151 and the first arm 331 abutting against the second limiting portion 152. The second sensor 153 can detect the placement state of the swing arm assembly 30.

[0041] The second initial state also includes the second arm body 341 being arranged in the space surrounded by the second limiting unit 15. The second limiting unit 15 limits the second arm body 341 from rotating around the central axis of the positioning unit 12. By limiting 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, thereby ensuring that the second arm unit 34 is press-fitted stably.

[0042] Furthermore, if Figure 4As shown, the guide unit 13 includes a guide platform 131, a guide column 132, and a first elastic part. The guide platform 131 is connected to the positioning unit 12. One end of the first elastic part is connected to the guide platform 131, and the other end is connected to the guide column 132, so that the guide column 132 can move along its own axis. The outer peripheral wall of the guide column 132 is slidably connected to the inner peripheral wall of the guide platform 131. The outer diameter of the guide column 132 is smaller than the inner diameter of the first arm ring 332. Before the bushing unit 35 is pressed into place, the first arm ring 332 is sleeved on the outer peripheral side of the guide column 132. At this time, the bushing can be placed on the top surface of the guide column 132 and the outer peripheral surface of the bushing unit 35 is partially in contact with the inner peripheral surface of the first arm ring 332. The guide unit 13 moves down at the same time as 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°, and the press-fitting is smoother.

[0043] The first initial state further includes the guide post 132 being disposed at the top of the guide post 132. The first arm 331 is sleeved on the outer circumference of the guide post 132 to provide initial guidance and positioning for the first arm unit 33.

[0044] The first working state also includes the bushing unit 35 and the guide column 132 moving toward the positioning unit 12 at the same time, so that the guide column 132 moves synchronously with the bushing unit 35, ensuring that the guiding function is continuously effective during the press-fitting process.

[0045] Example 2: This example discloses a method for press-fitting a swing arm assembly 30. The press-fitting method is applied to any swing arm assembly 30 press-fitting system of Example 1. The press-fitting method includes steps S10 to S30. Each step is described in detail as follows: In step S10 , based on the first arm unit 33 moving to the first initial state, the press-fit assembly 20 moves to abut against the bushing unit 35 to prepare for press-fitting, ensuring that the press-fit assembly 20 and the bushing unit 35 are in accurate contact.

[0046] In step S20, based on the movement of the pressing assembly 20 to abut against the bushing unit 35, the pressing assembly 20 drives the bushing unit 35 to move downward. In the process of the pressing assembly 20 driving the bushing unit 35 to move downward, the abutment area between the first arm ring 332 and the top surface of the positioning unit 12 gradually increases. During the assembly process, due to the influence of the deadweight of the swing arm assembly 30, the first arm ring 332 will tilt toward the direction close to the first arm body 331, and the guide unit 13 will move downward at the same time as 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°. In the process of the pressing assembly 20 driving the 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 will increase, and the bushing unit 35 will move toward the direction close to the first arm body 331. As the press-fitting proceeds, the first arm ring 332 will gradually tilt in the direction away from the first arm body 331, so that the contact area between the end face of the first arm ring 332 and the top surface of the positioning unit 12 gradually increases. Since the portion of the positioning unit 12 near the first abutting portion is higher than the portion of the positioning unit 12 near the second abutting portion, the first arm ring 332 can tilt toward the portion of the positioning unit 12 near the second abutting portion, thereby gradually reducing the angle between the first arm ring 332 and the central axis of the bushing unit 35, ensuring the accuracy of the press-fitting position of the bushing unit 35 and the first arm ring 332, while improving the stability of the press-fitting process and solving the problem of press-fitting skew. In step S30, based on the fact that the contact area between the outer peripheral wall of the bushing unit 35 and the inner peripheral wall of the first arm ring 332 is greater than or equal to the first set value, the press-fitting of the outer peripheral wall of the bushing unit 35 and the first arm ring 332 is completed.

[0047] Furthermore, the support assembly 10 further includes a first limiting unit 14. The first limiting unit 14 is connected to the support unit 11, and provides a limiting basis for the first arm unit 33, ensuring a stable limiting effect.

[0048] The first initial state also includes a line connecting the center position of the first arm 331 along the circumference of the guide unit 13 and the central axis of the guide unit 13 as the first reference line.

[0049] 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, facilitating the fitting of the second arm ring 342. The portion of the second arm ring 342 near the positioning unit 12, which is adjacent to the first arm unit 33, serves as a third abutment portion. The portion of the second arm ring 342 near the positioning unit 12, which is distal to the first arm unit 33, serves as a fourth abutment portion.

[0050] The press-assembly method of the swing arm assembly 30 further includes steps S40 to S80. Steps S10 to S30 and steps S40 to S80 are performed sequentially. Steps S40 to S80 are described in detail as follows: In step S40 , based on the completion of press-fitting of the outer peripheral wall of the bushing unit 35 and the first arm ring 332 , the first arm unit 33 is removed, and after press-fitting of the first arm unit 33 is completed, it is removed to make room for press-fitting of the second arm unit 34 .

[0051] In step S50 , based on the removal of the first arm unit 33 , the second arm unit 34 is moved to a second initial state, in preparation for press-fitting the second arm unit 34 .

[0052] 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 downward. In the process of the pressing assembly 20 driving the bushing unit 35 to move downward, the contact area between the second arm ring 342 and the top surface of the positioning unit 12 gradually increases. During the assembly process, due to the influence of the deadweight of the swing arm assembly 30, the second arm ring 342 will tilt toward the direction close to the second arm body 341, and the guide unit 13 will move downward at the same time as 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 second arm ring 342 is less than 15°. In the process of the pressing assembly 20 driving the second arm ring 342 to press, the angle between the central axis of the bushing unit 35 and the central axis of the second arm ring 342 will increase, and the bushing unit 35 will move toward the direction close to the second arm body 341. As the pressing proceeds, the second arm ring 342 will gradually tilt away from the second arm body 341, so that the contact area between the end face of the second arm ring 342 and the top surface of the positioning unit 12 gradually increases. Since the part of the positioning unit 12 close to the second abutting portion is higher than the part of the positioning unit 12 close to the second abutting portion, the second arm ring 342 can tilt toward the part of the positioning unit 12 close to the second abutting portion, so that the angle between the second arm ring 342 and the central axis of the bushing unit 35 gradually decreases, ensuring the accuracy of the pressing position of the bushing unit 35 and the second arm ring 342, while improving the stability of the pressing process and solving the problem of press-fitting tilt.

[0053] In step S70 , based on the contact area between the outer peripheral wall of the bushing unit 35 and the inner peripheral wall of the second arm ring 342 being greater than or equal to a second set value (such as 90% of the area of ​​the inner peripheral wall of the second arm ring 342 ), the outer peripheral wall of the bushing unit 35 and the second arm ring 342 are press-fitted.

[0054] 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 swing arm assembly press-fitting system, characterized in that: The swing arm assembly press-fitting system includes: The 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; and the positioning unit is sleeved on the outer periphery of the guide unit. a pressing assembly, the pressing assembly being slidably connected to the supporting unit; a central axis of the pressing assembly being collinear with a central axis of the guiding 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 pressing system includes a first initial state and a first working state; the first initial state includes the first arm ring being sleeved on the outer peripheral side of the guide unit, the first abutting portion abutting against the top surface of the positioning unit, and the second abutting portion being spaced apart from the top surface of the positioning unit, the part of the positioning unit close to the first abutting portion being higher than the part of the positioning unit close to the second abutting portion, and the first abutting portion being lower than the second abutting portion, and the bushing unit being arranged at the top end of the first arm ring, and the outer peripheral wall of the bushing unit abutting against the inner peripheral wall portion of the first arm ring; wherein, the first abutting portion is the part of the first arm ring close to one end of the positioning unit close to the first arm unit, and the second abutting portion is the part of the first arm ring close to one end of the positioning unit away from the first arm unit; the first working state includes the pressing assembly driving the bushing unit to move until the contact area with the inner peripheral wall of the first arm ring gradually increases, and the abutment area between the end face of the first arm ring and the top surface of the positioning unit gradually increases.

2. A 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 arranged in a space surrounded by the first limiting unit, and the first limiting unit limiting the first arm from rotating around the central axis of the positioning unit.

3. A 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 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 as a first reference line; 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 peripheral side of the guide unit, the second arm body being arranged outside the enclosed space of the first limiting groove, the third abutting portion abutting against the top surface of the positioning unit, the fourth abutting portion being spaced apart from the top surface of the positioning unit, the portion of the positioning unit close to the third abutting portion being higher than the portion of the positioning unit close to the fourth abutting portion, and the third abutting portion Below the fourth abutment portion, a 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 a 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 a set angle range, the bushing unit is arranged at the top end 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 a portion of the second arm ring close to one end of the positioning unit close to the second arm unit, and the fourth abutment portion is a portion of the second arm ring close to one end of the positioning unit away from the second arm unit; The second working state includes the pressing assembly driving the bushing unit to move until the contact area with 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. A 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 positioning unit includes a positioning seat, a first positioning portion, a second positioning portion, a third positioning portion, a fourth positioning portion, and a guide hole; the positioning seat is connected to the support unit; some of the guide holes extend from the top surface of the positioning seat to the bottom surface of the positioning seat; the first positioning portion, the second positioning portion, the third positioning portion, and the fourth positioning portion are respectively connected to the top surface of the positioning seat; The first positioning portion, the second positioning portion, the third positioning portion, and the fourth positioning portion are sequentially abutted along the circumferential direction of the positioning seat, thereby surrounding and forming another portion of the guide hole; the top end of the first positioning portion is respectively higher than the top end of the second positioning portion, the top end of the third positioning portion, and the top end of the fourth positioning portion; the guide unit is connected to the guide hole; The first initial state further includes the first abutting portion abutting against a portion of the top surface of the first positioning portion close to the second positioning portion, and the first abutting portion is spaced apart from the top surface of the third positioning portion; The second initial state further includes the third abutting portion abutting against a portion of the first positioning portion close to the fourth positioning portion, and the fourth abutting portion is spaced apart from the third abutting portion.

6. A swing arm assembly press-fitting system according to claim 5, characterized in that: The height of the top surface of the first positioning portion, the height of the top surface of the second positioning portion, and the height of the top surface of the third positioning portion gradually decrease in sequence; the height of the top surface of the first positioning portion, the height of the top surface of the fourth positioning portion, and the height of the top surface of the third positioning portion 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 further includes the second arm being disposed in a space surrounded by the second limiting unit, and the second limiting unit limiting 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 guide unit includes a guide platform, a guide column, and a first elastic portion; the guide platform is connected to the positioning unit; one end of the first elastic portion is connected to the guide platform, and the other end is connected to the guide column; the outer peripheral wall of the guide column is slidably connected to the inner peripheral wall of the guide platform; the outer diameter of the guide column is smaller than the inner diameter of the first arm ring; The first initial state further includes the guide post being arranged at the top end of the guide post; 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 column moving toward the positioning unit simultaneously.

9. A swing arm assembly press-fitting method, characterized in that: The swing arm assembly press-assembly method is applied to a swing arm assembly press-assembly system according to any one of claims 1 to 8, and the swing arm assembly press-assembly method comprises: Based on the first arm unit moving to the first initial state, the press-fit 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.

10. A swing arm assembly press-fitting method 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 further includes a line connecting the center position of the first arm along the circumference of the guide unit and the central axis of the guide unit as a first reference line; 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; a portion of the second arm ring close to the positioning unit and close to the first arm unit is a third abutment portion, and a portion of the second arm ring close to the positioning unit and away from the first arm unit is a fourth abutment portion; The swing arm assembly press-fitting method further comprises: After the outer peripheral wall of the bushing unit and the first arm ring are press-fitted, the first arm unit is removed; moving the second arm unit to a 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.

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