A small-angle circular arc oscillation transmission structure

Abstract

This invention discloses a small-angle circular arc swing transmission structure, belonging to the field of precision rolling guide technology. It includes a fixed base, with symmetrically arranged large-size cam bearing followers on one side of the bottom of the fixed base. Multiple small-size cam bearing followers are arranged on the side of the fixed base near the large-size cam bearing followers. An upper spring plate fixing assembly is located at the top of the fixed base, and a front spring plate fixing assembly is located on one side of the fixed base. An arc-shaped transmission component is located between the upper and front spring plate fixing assemblies, positioned above the large-size cam bearing followers. A virtual load is mounted on the side of the arc-shaped transmission component away from the fixed base. This transmission structure allows for the connection between the virtual load and the fixed base and enables small-angle left and right rotation around the Z-axis. The radius of the arc surface of the arc-shaped transmission component can be changed to meet different rotation radius transmission requirements, exhibiting a certain degree of motion accuracy and stability.

Description

Technical Field

[0001] This invention belongs to the field of precision rolling guide technology, and particularly relates to a small-angle circular arc swing transmission structure. Background Technology

[0002] The arc-shaped crossed roller guide is a high-precision, non-circulating arc-shaped guide component, consisting of four core parts: an arc-shaped track base, 90° crossed rollers, a roller cage, and a sliding base. With its ultra-high rotational accuracy, high rigidity, and long lifespan, it is commonly used in high-end precision equipment (such as precision optical instruments, semiconductor and electronic manufacturing equipment, high-end medical imaging, and surgical robots) where small-angle, high-precision arc oscillation and indexing positioning are required.

[0003] Traditional curved cross roller guides are only suitable for circular motion with a fixed radius of rotation, and have poor versatility; the track processing technology is stringent and the precision requirements are high, and the overall cost is much higher than that of ordinary linear guides; in addition, the requirements for installation coaxiality and flatness are extremely high, making installation and debugging difficult. Summary of the Invention

[0004] The purpose of this invention is to provide a small-angle circular arc swing transmission structure to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides a small-angle circular arc swing transmission structure, including a fixed base. A large-size bottom cam bearing follower is symmetrically arranged on one side of the bottom of the fixed base. Multiple small-size bottom cam bearing followers are arranged on the side of the fixed base near the large-size bottom cam bearing follower. An upper spring plate fixing assembly is arranged on the top of the fixed base. A front spring plate fixing assembly is arranged on one side of the fixed base. An arc-shaped transmission component is arranged between the upper spring plate fixing assembly and the front spring plate fixing assembly. The arc-shaped transmission component is located above the large-size bottom cam bearing follower. A virtual load is installed on the side of the arc-shaped transmission component away from the fixed base.

[0006] Optionally, the bottom large-size cam bearing follower is provided with a bottom large-size cam bearing follower fixing nut adapted to it, and the bottom small-size cam bearing follower is provided with a bottom small-size cam bearing follower fixing nut adapted to it. The fixing base is symmetrically provided with first positioning pins, which are adapted to the front spring plate fixing assembly. The top surface of the fixing base is symmetrically provided with second positioning pins, which are adapted to the upper spring plate fixing assembly.

[0007] Optionally, the upper spring sheet fixing assembly includes multiple stacked upper spring sheets, with multiple upper spring sheet pressure plates on the top of each upper spring sheet. The upper spring sheet pressure plates are fixed to the upper spring sheets by multiple upper spring sheet fixing screws. Multiple upper spring sheet positioning pins are provided between the upper spring sheets and the upper spring sheet pressure plates. The bottom of each upper spring sheet is provided with a fixing part, which is fixedly connected to the fixing base.

[0008] Optionally, the fixing part includes a left-side fixing member, a right-side fixing member, and a middle fixing member of the upper spring plate, respectively disposed at the bottom of the upper spring plate. The upper spring plate fixing screw is threadedly connected to the left-side fixing member, the right-side fixing member, and the middle fixing member of the upper spring plate, respectively. The upper spring plate fixing screw located on the middle fixing member of the upper spring plate is threadedly connected to the top surface of the fixing base. The ends of the left-side fixing member and the right-side fixing member of the upper spring plate are respectively provided with upper small-sized cam bearing followers. The upper small-sized cam bearing followers are provided with upper small-sized cam bearing follower fixing nuts that are adapted to them. The second positioning pin is adapted to the middle fixing member of the upper spring plate. The upper small-sized cam bearing follower is adapted to the arc-shaped transmission component.

[0009] Optionally, the front spring plate fixing assembly includes multiple stacked front spring plates. On the side of each front spring plate closest to the fixing base, there are a left front spring plate fixing member, a right front spring plate fixing member, and a middle front spring plate fixing member. The middle front spring plate fixing member is fixedly connected to the fixing base. On the side of each front spring plate away from the fixing base, there are multiple front spring plate pressure plates. The front spring plate pressure plates are connected to the front spring plates via multiple front spring plate positioning pins and multiple front spring plate fixing screws. The front spring plate fixing screws are threadedly connected to the left front spring plate fixing member, the right front spring plate fixing member, and the middle front spring plate fixing member.

[0010] Optionally, the top of the fixing member in the middle of the front spring plate is provided with an upper tightening screw, and the bottom of the fixing member in the middle of the front spring plate is provided with a lower tightening screw. The upper tightening screw and the lower tightening screw are respectively threaded to the fixing base.

[0011] Optionally, front small-sized cam bearing followers are respectively installed at both ends of the left and right fixing parts of the front spring plate. The front small-sized cam bearing followers are provided with front small-sized cam bearing followers fixing nuts that are adapted to them. The front small-sized cam bearing followers are adapted to the arc-shaped transmission component.

[0012] Optionally, the arc-shaped transmission component includes a front transmission arc surface and a rear transmission arc surface. The front transmission arc surface is tangent to the front small-sized cam bearing follower, and the rear transmission arc surface is tangent to the bottom small-sized cam bearing follower. The arc-shaped transmission component has multiple virtual load mounting threaded holes at equal intervals on both sides. The arc-shaped transmission component also has a first positioning hole and a second positioning hole on both sides.

[0013] Optionally, there is a first installation gap between the upper spring plate fixing assembly and the fixing base, and a second installation gap between the front spring plate fixing assembly and the fixing base.

[0014] Optionally, the axes of the two bottom large-size cam bearing followers pass through the rotation center of the arc-shaped transmission element.

[0015] This invention discloses the following technical advantages: The transmission structure of this invention can connect a virtual load to a fixed base and can rotate at small angles left and right around the Z-axis. It allows for changing the radius of the arc-shaped transmission component to meet transmission requirements with different rotation radii, and possesses a certain degree of motion accuracy and stability. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the small-angle circular arc oscillation transmission structure of the present invention; Figure 2 This is a schematic diagram of the small-angle circular arc oscillation transmission structure of the present invention without the installation of a virtual load; Figure 3 This is a schematic diagram of the structure of the fixing base of the present invention; Figure 4 This is a schematic diagram of the upper spring sheet fixing assembly of the present invention; Figure 5 This is a schematic diagram of the front spring sheet fixing assembly of the present invention; Figure 6 This is a structural schematic diagram of the front spring sheet fixing assembly of the present invention from another angle; Figure 7 This is a schematic diagram of the arc-shaped transmission component of the present invention; Figure 8 This is a schematic diagram of the clamping force adjustment structure of the arc-shaped transmission component of the present invention; Figure 9 This is a schematic diagram showing the position of the arc-shaped transmission component of the present invention when it rotates 5° to the left around the Z-axis; Figure 10This is a schematic diagram of the initial position of the arc-shaped transmission component of the present invention; Figure 11 This is a schematic diagram showing the position of the arc-shaped transmission component of the present invention when it rotates 5° to the right around the Z-axis.

[0017] Figure label: 1. Fixed base; 2. Virtual load; 3. Arc-shaped transmission component; 4. Upper spring plate fixing assembly; 5. Front spring plate fixing assembly; 101. Bottom large-size cam bearing follower; 102. Bottom large-size cam bearing follower fixing nut; 103. Bottom small-size cam bearing follower; 104. Bottom small-size cam bearing follower fixing nut; 105. First positioning pin; 106. Second positioning pin; 301. Front transmission arc surface; 302. Rear transmission arc surface; 303. Virtual load mounting threaded hole; 304. First positioning hole; 305. Second positioning hole; 401. Upper spring plate left side fixing component; 402. Upper spring plate right side fixing component; 403. Upper small-size cam bearing follower; 404. Upper spring... 405. Upper spring plate pressure plate; 406. Upper spring plate fixing screw; 407. Upper small-sized cam bearing follower fixing nut; 408. Upper spring plate positioning pin; 410. Upper spring plate middle fixing part; 501. Front spring plate left side fixing part; 502. Front spring plate right side fixing part; 503. Front spring plate middle fixing part; 504. Front spring plate; 505. Front spring plate pressure plate; 506. Upper tightening screw; 507. Lower tightening screw; 508. Front small-sized cam bearing follower; 509. Front small-sized cam bearing follower fixing nut; 510. Front spring plate positioning pin; 511. Front spring plate fixing screw; 601. First installation gap; 602. Second installation gap. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Reference Figures 1 to 11As shown, this embodiment provides a small-angle circular arc swing transmission structure, including a fixed base 1. A large-size bottom cam bearing follower 101 is symmetrically arranged on one side of the bottom of the fixed base 1. A plurality of small-size bottom cam bearing followers 103 are arranged on the side of the fixed base 1 near the large-size bottom cam bearing follower 101. An upper spring plate fixing assembly 4 is arranged on the top of the fixed base 1. A front spring plate fixing assembly 5 is arranged on one side of the fixed base 1. An arc-shaped transmission component 3 is arranged between the upper spring plate fixing assembly 4 and the front spring plate fixing assembly 5. The arc-shaped transmission component 3 is located above the large-size bottom cam bearing follower 101. A virtual load 2 is installed on the side of the arc-shaped transmission component 3 away from the fixed base 1.

[0021] The transmission structure of this invention enables the connection between the virtual load 2 and the fixed base 1, and allows for small-angle rotation around the Z-axis. It allows for changing the radius of the arc-shaped transmission component 3 to meet different rotation radius transmission requirements, and possesses a certain degree of motion accuracy and stability.

[0022] In a further optimized design, the bottom large-size cam bearing follower 101 is equipped with a bottom large-size cam bearing follower fixing nut 102 that is compatible with it, and the bottom small-size cam bearing follower 103 is equipped with a bottom small-size cam bearing follower fixing nut 104 that is compatible with it. The fixing base 1 is symmetrically provided with first positioning pins 105, which are compatible with the front spring plate fixing assembly 5. The top surface of the fixing base 1 is symmetrically provided with second positioning pins 106, which are compatible with the upper spring plate fixing assembly 4.

[0023] The fixed base 1 is machined with corresponding mounting thread holes, positioning holes and other structures. The bottom large-size cam bearing follower 101, the bottom large-size cam bearing follower fixing nut 102, the bottom small-size cam bearing follower 103 and the bottom small-size cam bearing follower fixing nut 104 are installed in the appropriate position on the fixed base 1 in sequence, and the arc-shaped transmission component 3 is placed on the bottom large-size cam bearing follower 101.

[0024] The axis of the large-size cam bearing follower 101 at the bottom passes through the rotation center of the arc-shaped transmission component 3 and bears the gravity of the arc-shaped transmission component 3 and all components mounted on the arc-shaped transmission component 3 in the Z direction.

[0025] The small-sized cam bearing follower 103 at the bottom is tangent to the transmission arc surface 302 behind the arc-shaped transmission component 3, which restricts the displacement of the arc-shaped transmission component 3 in the -X direction.

[0026] The first positioning pin 105 controls the installation accuracy of the front spring plate fixing assembly 5, and the second positioning pin 106 controls the installation accuracy of the upper spring plate fixing assembly 4.

[0027] In a further optimized design, the upper spring sheet fixing assembly 4 includes multiple stacked upper spring sheets 404. The top of the upper spring sheet 404 is provided with multiple upper spring sheet pressure plates 405. The upper spring sheet pressure plates 405 and the upper spring sheet 404 are fixed by multiple upper spring sheet fixing screws 406. Multiple upper spring sheet positioning pins 408 are provided between the upper spring sheet 404 and the upper spring sheet pressure plates 405. The bottom of the upper spring sheet 404 is provided with a fixing part, which is fixedly connected to the fixing base 1.

[0028] Further optimization of the scheme: the fixing part includes an upper spring plate left side fixing member 401, an upper spring plate right side fixing member 402, and an upper spring plate middle fixing member 410 respectively set at the bottom of the upper spring plate 404. The upper spring plate fixing screw 406 is threadedly connected to the upper spring plate left side fixing member 401, the upper spring plate right side fixing member 402, and the upper spring plate middle fixing member 410 respectively. The upper spring plate fixing screw 406 located on the upper spring plate middle fixing member 410 is threadedly connected to the top surface of the fixing base 1. The ends of the upper spring plate left side fixing member 401 and the upper spring plate right side fixing member 402 are respectively provided with upper small-sized cam bearing follower 403. The upper small-sized cam bearing follower 403 is provided with an upper small-sized cam bearing follower fixing nut 407 adapted to it. The second positioning pin 106 is adapted to the upper spring plate middle fixing member 410. The upper small-sized cam bearing follower 403 is adapted to the arc-shaped transmission member 3.

[0029] Assemble the upper spring plate fixing assembly 4, and install the upper small-sized cam bearing follower 403 at the corresponding positions of the upper spring plate left fixing part 401 and the upper spring plate right fixing part 402, respectively, and tighten them with the upper small-sized cam bearing follower fixing nut 407. Install the upper spring plate positioning pins 408 into the positioning pin holes of the upper spring plate left fixing part 401 and the upper spring plate right fixing part 402, respectively. Then, install several upper spring plates 404 and corresponding upper spring plate pressure plates 405 in sequence, and fix them to the upper spring plate left fixing part 401, the upper spring plate right fixing part 402 and the upper spring plate middle fixing part 410 with the upper spring plate fixing screws 406. Finally, fix the assembled upper spring plate fixing assembly 4 to the fixing base 1 with the upper spring plate fixing screws 406 and press the arc-shaped transmission component 3 on top.

[0030] The upper spring plate fixing assembly 4 restricts the displacement of the arc-shaped transmission component 3 in the Z direction.

[0031] The left-side fixing member 401 and the right-side fixing member 402 of the upper spring plate are mirror-symmetrical structures.

[0032] After installation, the axis of the small upper cam bearing follower 403 rotates through the arc-shaped transmission component 3 to the center of rotation.

[0033] Adjusting the number and thickness of the upper spring plates 404 changes the clamping force of the upper spring plate fixing assembly 4 on the arc-shaped transmission component 3.

[0034] Adjust the installation gap between the upper spring plate fixing assembly 4 and the fixing base 1 to change the clamping force of the upper spring plate fixing assembly 4 on the arc-shaped transmission component 3.

[0035] In a further optimized design, the front spring plate fixing assembly 5 includes multiple stacked front spring plates 504. On the side of the front spring plate 504 closest to the fixing base 1, there are front spring plate left fixing member 501, front spring plate right fixing member 502, and front spring plate middle fixing member 503 respectively. The front spring plate middle fixing member 503 is fixedly connected to the fixing base 1. On the side of the front spring plate 504 away from the fixing base 1, there are multiple front spring plate pressure plates 505 respectively. The front spring plate pressure plates 505 are connected to the front spring plate 504 through multiple front spring plate positioning pins 510 and multiple front spring plate fixing screws 511 respectively. The front spring plate fixing screws 511 are threadedly connected to the front spring plate left fixing member 501, front spring plate right fixing member 502, and front spring plate middle fixing member 503 respectively.

[0036] In a further optimized design, the top of the fixing member 503 in the middle of the front spring plate is symmetrically provided with an upper tightening screw 506, and the bottom of the fixing member 503 in the middle of the front spring plate is provided with a lower tightening screw 507. The upper tightening screw 506 and the lower tightening screw 507 are respectively threaded to the fixing base 1.

[0037] In a further optimized design, front small-sized cam bearing follower 508 is installed at both ends of the front spring plate left side fixing part 501 and the front spring plate right side fixing part 502. The front small-sized cam bearing follower 508 is provided with a front small-sized cam bearing follower fixing nut 509 that is adapted to it. The front small-sized cam bearing follower 508 is adapted to the arc-shaped transmission part 3.

[0038] Assemble the front spring plate fixing assembly 5, and install the front small-sized cam bearing follower 508 at the corresponding positions of the front spring plate left fixing part 501 and the front spring plate right fixing part 502, respectively, and tighten them with the front small-sized cam bearing follower fixing nut 509. Install the front spring plate positioning pins 510 into the positioning pin holes of the front spring plate left fixing part 501 and the front spring plate right fixing part 502, respectively. Then, install several front spring plates 504 and corresponding front spring plate pressure plates 505 in sequence, and fix them to the front spring plate left fixing part 501, the front spring plate right fixing part 502 and the front spring plate middle fixing part 503 with the front spring plate fixing screws 511. Finally, use the upper tightening screw 506 and the lower tightening screw 507 to fix the assembled front spring plate fixing assembly 5 to the fixing base 1 and press the arc-shaped transmission component 3 in front.

[0039] The front spring plate fixing assembly 5 restricts the displacement of the arc-shaped transmission component 3 in the X direction.

[0040] The left-side fixing member 501 and the right-side fixing member 502 of the front spring plate are mirror-symmetrical structures.

[0041] After installation, the front small-sized camshaft bearing follower 508 is tangent to the front drive arc surface 301.

[0042] Adjusting the number and thickness of the front spring plates 504 changes the clamping force of the front spring plate fixing assembly 5 on the arc-shaped transmission component 3.

[0043] Adjust the installation gap between the front spring plate fixing assembly 5 and the fixing base 1 to change the clamping force of the front spring plate fixing assembly 5 on the arc-shaped transmission component 3.

[0044] Finally, tighten the screws to install the virtual load 2 onto the arc-shaped transmission component 3, thus completing the installation and use of the transmission structure of this invention.

[0045] Further optimization of the scheme: the arc-shaped transmission component 3 includes a front transmission arc surface 301 and a rear transmission arc surface 302. The front transmission arc surface 301 is tangent to the front small-sized cam bearing follower 508, and the rear transmission arc surface 302 is tangent to the bottom small-sized cam bearing follower 103. Multiple virtual load mounting threaded holes 303 are provided at equal intervals on both sides of the arc-shaped transmission component 3. A first positioning hole 304 and a second positioning hole 305 are provided on both sides of the arc-shaped transmission component 3.

[0046] The scheme is further optimized so that there is a first installation gap 601 between the upper spring plate fixing assembly 4 and the fixing base 1, and a second installation gap 602 between the front spring plate fixing assembly 5 and the fixing base 1.

[0047] In a further optimized design, the axes of the two large-diameter bottom cam bearing followers 101 pass through the rotation center of the arc-shaped transmission component 3.

[0048] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0049] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A small-angle circular arc oscillation transmission structure, characterized in that: The system includes a fixed base (1), on one side of the bottom of the fixed base (1) are symmetrically provided large-size cam bearing followers (101), and on the side of the fixed base (1) near the large-size cam bearing followers (101) are provided multiple small-size cam bearing followers (103). The top of the fixed base (1) is provided with an upper spring plate fixing assembly (4), and on one side of the fixed base (1) is a front spring plate fixing assembly (5). An arc-shaped transmission component (3) is provided between the upper spring plate fixing assembly (4) and the front spring plate fixing assembly (5). The arc-shaped transmission component (3) is located above the large-size cam bearing followers (101), and a virtual load (2) is installed on the side of the arc-shaped transmission component (3) away from the fixed base (1).

2. The small-angle circular arc oscillation transmission structure according to claim 1, characterized in that: The bottom large-size cam bearing follower (101) is provided with a bottom large-size cam bearing follower fixing nut (102) adapted to it, and the bottom small-size cam bearing follower (103) is provided with a bottom small-size cam bearing follower fixing nut (104) adapted to it. The fixed base (1) is symmetrically provided with a first positioning pin (105), which is adapted to the front spring plate fixing assembly (5). The top surface of the fixed base (1) is symmetrically provided with a second positioning pin (106), which is adapted to the upper spring plate fixing assembly (4).

3. The small-angle circular-arc swing transmission structure according to claim 2, characterized in that: The upper spring sheet fixing assembly (4) includes multiple stacked upper spring sheets (404). The top of the upper spring sheet (404) is provided with multiple upper spring sheet pressure plates (405). The upper spring sheet pressure plates (405) and the upper spring sheet (404) are fixed by multiple upper spring sheet fixing screws (406). Multiple upper spring sheet positioning pins (408) are provided between the upper spring sheet (404) and the upper spring sheet pressure plates (405). The bottom of the upper spring sheet (404) is provided with a fixing part, which is fixedly connected to the fixing base (1).

4. The small-angle circular-arc swing transmission structure according to claim 3, characterized in that: The fixing part includes a left-side fixing member (401), a right-side fixing member (402), and a middle fixing member (410) respectively disposed at the bottom of the upper spring plate (404). The upper spring plate fixing screw (406) is threadedly connected to the left-side fixing member (401), the right-side fixing member (402), and the middle fixing member (410) respectively. The upper spring plate fixing screw (406) located on the middle fixing member (410) is connected to the upper spring plate. The top surface of the fixed base (1) is threaded. The ends of the left side fixing member (401) and the right side fixing member (402) of the upper spring plate are respectively provided with upper small-sized cam bearing follower (403). The upper small-sized cam bearing follower (403) is provided with an upper small-sized cam bearing follower fixing nut (407) that is adapted to it. The second positioning pin (106) is adapted to the middle fixing member (410) of the upper spring plate. The upper small-sized cam bearing follower (403) is adapted to the arc-shaped transmission member (3).

5. The small-angle circular-arc swing transmission structure according to claim 2, characterized in that: The front spring plate fixing assembly (5) includes multiple stacked front spring plates (504). On the side of the front spring plate (504) near the fixing base (1), there are front spring plate left fixing member (501), front spring plate right fixing member (502) and front spring plate middle fixing member (503). The front spring plate middle fixing member (503) is fixed to the fixing base (1). On the side of the front spring plate (504) away from the fixing base (1), there are multiple front spring plate pressure plates (505). The front spring plate pressure plates (505) are connected to the front spring plate (504) through multiple front spring plate positioning pins (510) and multiple front spring plate fixing screws (511). The front spring plate fixing screws (511) are threaded to the front spring plate left fixing member (501), the front spring plate right fixing member (502) and the front spring plate middle fixing member (503).

6. The small-angle circular arc oscillation transmission structure according to claim 5, characterized in that: The top of the middle fixing member (503) of the front spring plate is symmetrically provided with an upper tightening screw (506), and the bottom of the middle fixing member (503) of the front spring plate is provided with a lower tightening screw (507). The upper tightening screw (506) and the lower tightening screw (507) are respectively threaded to the fixing base (1).

7. The small-angle circular arc oscillation transmission structure according to claim 5, characterized in that: The front small-size cam bearing follower (508) is installed at both ends of the left side fixing member (501) and the right side fixing member (502) of the front spring plate. The front small-size cam bearing follower (508) is provided with a front small-size cam bearing follower fixing nut (509) that is adapted to it. The front small-size cam bearing follower (508) is adapted to the arc-shaped transmission member (3).

8. The small-angle circular-arc swing transmission structure according to claim 7, characterized in that: The arc-shaped transmission component (3) includes a front transmission arc surface (301) and a rear transmission arc surface (302). The front transmission arc surface (301) is tangent to the front small-size cam bearing follower (508), and the rear transmission arc surface (302) is tangent to the bottom small-size cam bearing follower (103). The arc-shaped transmission component (3) has multiple virtual load mounting threaded holes (303) at equal intervals on both sides. The arc-shaped transmission component (3) has a first positioning hole (304) and a second positioning hole (305) on both sides.

9. The small-angle circular-arc swing transmission structure according to claim 1, characterized in that: There is a first installation gap (601) between the upper spring plate fixing assembly (4) and the fixing base (1), and there is a second installation gap (602) between the front spring plate fixing assembly (5) and the fixing base (1).

10. The small-angle circular arc oscillation transmission structure according to claim 1, characterized in that: The axes of the two bottom large-size cam bearing followers (101) pass through the rotation center of the arc-shaped transmission element (3).

Images