High-precision supporting structure for optical element

Abstract

The utility model discloses a high-precision optical element supporting structure, which belongs to the technical field of high-precision optical element supporting and comprises an optical element, a supporting structure and an elastic pressing block. Supporting and fixing parts are distributed outside the optical element, the supporting and fixing parts are connected with the interior of the supporting structure through mounting rings, adjusting lead screws are mounted in the supporting and fixing parts, and supporting assemblies for bearing the optical element are arranged on the surfaces of the adjusting lead screws; the annular frame is connected to the outer surface of the mounting ring, the top of the annular frame is rotationally provided with a gear ring, the arc-shaped partition plate is arranged on the outer side of the gear ring, the surface of one side of the arc-shaped partition plate is movably connected with a positioning assembly used for locking the position of the gear ring, and the other side of the arc-shaped partition plate is connected with an I-shaped frame; an adjusting and resetting assembly for driving the gear ring is arranged in the I-shaped frame; the problem that the structure of the optical device is relatively tedious to install and adjust can be reduced, and the influence of assembly stress and thermal stress on the optical device in the using process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-precision optical element support, and specifically relates to a high-precision support structure for optical elements. Background Art

[0002] The fixing of optical elements is usually achieved by using a support structure. The assembly between the support structure and the element will definitely affect the surface shape of the element to some extent, mainly because during the assembly process, a force or torque will be generated on the optical element, causing the element to deform slightly. In addition, if there is a significant temperature change in the use environment of the element or the element is subjected to heat radiation, if the support structure is not designed reasonably, unpredictable thermal deformation will occur inside the element to a certain extent, especially in a vacuum environment. For high-precision optical elements, this slight deformation is absolutely not allowed. For unpredictable thermal deformation, only by fundamentally removing the influence of the heat source can the surface shape change of the element caused by thermal deformation be suppressed. For predictable thermal deformation, active compensation / thermal control methods can usually be used to suppress it, and its cost and difficulty will be greatly reduced. In order to meet the requirements of high-precision surface shape of optical elements, the element support device must consider how to effectively reduce the stress introduced by assembly and environmental changes during the structural design process, and affect the surface shape of the element as little as possible. However, although the existing support structure can effectively reduce the influence of thermal stress and assembly stress on optical elements, there is actually a problem of complex structure and relatively cumbersome assembly and adjustment. To this end, we propose a high-precision support structure for optical elements to solve the problems existing in the prior art. Utility Model Content

[0003] The purpose of the present invention is to provide a high-precision support structure for optical elements, so as to solve the problems in the prior art proposed in the above background technology, such as reducing the relatively cumbersome structure assembly and adjustment of optical devices and the influence of assembly stress and thermal stress on optical devices during use.

[0004] To achieve the above purpose, this utility adopts the following technical solutions:

[0005] A high-precision support structure for an optical element, comprising an optical element, a support structure and an elastic pressure block; a support and fixing portion is arranged on the outside of the optical element, the support and fixing portion is connected to the inside of the support structure through a mounting ring, an adjusting screw is installed inside the support and fixing portion, and a support component for bearing the optical element is arranged on the surface of the adjusting screw; a mounting base surface is mounted on the top of the mounting ring, the elastic pressure block is movably mounted on the mounting base surface, and a clamping component of the elastic pressure block is pressed on the top of the optical element; an annular frame is connected to the outer surface of the mounting ring, a gear ring is rotatably installed on the top of the annular frame, and the surface of the gear ring meshes with the end of the transmission adjustment screw; an arc-shaped partition is arranged on the outside of the gear ring, a positioning component for locking the position of the gear ring is movably connected to the surface of one side of the arc-shaped partition, and an I-shaped frame is connected to the other side of the arc-shaped partition, and an adjustment and reset component for transmitting the gear ring is arranged inside the I-shaped frame.

[0006] Preferably, a boss is provided on the outer side of the bottom of the optical element, and the elastic pressure block includes a clamping component, a limiting component and a fixing component, the bottom of the clamping component is pressed against the surface of the boss, the limiting component is movably connected to the top of the mounting base, and the fixing component is installed on the top of the mounting base through a fixing part.

[0007] Preferably, the support assembly includes: a connecting seat movably mounted on the surface of the adjusting screw rod, and a support member connected to the end of the connecting seat; wherein, guide plates are connected on both sides of the inner wall of the supporting fixed part, guide grooves are opened on both sides of the connecting seat, the inner wall of the guide groove is slidably connected to the surface of the guide plate, and the bottom of the connecting seat is connected to a flexible support plate.

[0008] Preferably, the bottom of the flexible support plate is connected to the surface of the substrate via a mounting ring, one side of the connecting seat is connected to a first magnet, and the inner wall of the guide plate is provided with a second magnet matching the first magnet.

[0009] Preferably, the end of the adjusting screw rod is connected to a driven gear, the surface of the driven gear is meshingly connected to the gear ring, the inner wall of the annular frame is connected to a limiting ring, and the surface of the limiting ring is rotatably connected to the outer side of the gear ring.

[0010] Preferably, the positioning assembly includes: a locking arc plate meshingly connected to the top of the gear ring, and a limit plate connected to one side of the locking arc plate; wherein a limit groove is opened on the surface of the arc-shaped partition, the limit plate is slidably connected to the inner wall of the limit groove, one side of the limit plate is connected to an adjusting screw barrel, and the top end of the adjusting screw barrel is movably connected to the top of the supporting structure.

[0011] Preferably, the top of the locking arc plate is slidably connected to a limiting rod, a locking spring is sleeved on the surface of the limiting rod, the bottom end of the locking spring is connected to the top of the locking arc plate, and the top end of the limiting rod is connected to the inner wall of the supporting structure.

[0012] Preferably, the adjustment and reset assembly includes: a limit guide plate connected to the inner wall of the I-shaped frame, and a limit baffle slidably connected to the surface of the limit guide plate; wherein the surface of the limit baffle is connected to the adjustment rod, and an active bevel gear is installed on the surface of the adjustment rod and located on the upper part of the limit baffle.

[0013] Preferably, the surface of the I-shaped frame is rotatably connected to a connecting rod, both ends of the connecting rod are respectively connected to a transmission gear and a connecting bevel gear, the surface of the transmission gear meshes with the surface of the connecting ring, and the active bevel gear is meshed and connected with the connecting bevel gear.

[0014] Preferably, a return spring is sleeved on the surface of the adjusting rod, the top of the return spring is connected to the bottom of the limit baffle, a limit clamping plate is arranged above the active bevel gear, the surface of the limit clamping plate is movably connected to the supporting structure, and the top of the adjusting rod is connected to the adjusting disk.

[0015] Technical effects and advantages of this utility model: Compared with the prior art, the high-precision support structure of an optical element proposed in this utility model has the following advantages:

[0016] 1. The utility model arranges the structures such as the elastic pressure block, the mounting ring, the support fixing part, the adjusting screw rod, the support assembly and the adjusting reset assembly to place the optical element on the top of the support member. By rotating the adjusting disk, the active bevel gear can drive the connecting bevel gear to drive, so that the transmission gear drives the gear ring to rotate, thereby transmitting the driven gear, so as to achieve the effect of rotating the adjusting screw rod, so that the support member slides on the surface of the guide plate through the connecting seat, so as to control the support member to adjust the axial height of the optical element support, fix the elastic pressure block on the top of the mounting base surface through the limiting component and the fixing component, so that the pressing component is pressed on the boss to fix the optical element, and the first magnet on the surface of the connecting seat cooperates with the second magnet on the inner wall of the supporting fixing part, so as to effectively prevent the connecting seat from loosening, thereby ensuring the accuracy and stability of the support for the optical element.

[0017] 2. The utility model cooperates with the arc-shaped partition plate, the annular frame and the positioning component and other structures, and can act on the locking arc plate through the locking spring on the surface of the limit rod, so as to ensure that the locking spring is pressed against the top of the gear ring, fix the position of the gear ring, and prevent the gear ring from rotating on the top of the annular frame through the limit ring and shaking. By clamping the tool on the top of the adjusting screw barrel, the locking arc plate can be controlled to fall off and lock the gear ring meshing, so as to facilitate the height control of the support member by rotating the gear ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional structural diagram of the present utility model is shown;

[0019] Figure 2 is a schematic diagram of the structure of the practical optical element;

[0020] Figure 3 This is a schematic diagram of the structure of the practical elastic pressing block;

[0021] Figure 4 This is a schematic diagram of the structure of the practical curved partition;

[0022] Figure 5 This is a schematic diagram of the structure of the support fixing part of the utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the practical annular frame;

[0024] Figure 7 It is a structural schematic diagram of the practical limit baffle.

[0025] In the figure: 1, optical element; 101, boss; 2, supporting structure; 3, elastic pressure block; 301, pressing component; 302, limiting component; 303, fixing component; 4, substrate; 5, mounting ring; 6, I-shaped frame; 7, mounting base; 8, arc-shaped partition; 9, limiting groove; 10, limiting rod; 11, locking spring; 12, locking arc plate; 13, limiting disk; 14, adjusting screw; 15, supporting fixing part; 16, guide plate; 17, adjusting wire Rod; 18, driven gear; 19, connecting seat; 20, guide groove; 21, support member; 22, flexible support plate; 23, first magnet; 24, second magnet; 25, annular frame; 26, limit ring; 27, gear ring; 28, limit guide plate; 29, connecting rod; 30, transmission gear; 31, connecting bevel gear; 32, limit baffle; 33, adjusting rod; 34, active bevel gear; 35, adjusting disk; 36, limit clamping plate; 37, reset spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the practical embodiment to clearly and completely describe the technical solution in the practical embodiment. Obviously, the described embodiment is only a part of the embodiment of the practical, not all of the embodiments. The specific embodiments described here are only used to explain the practical and are not used to limit the practical. Based on the embodiments in the practical, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this practical.

[0027] This utility provides Figure 1-7 The high-precision support structure of an optical element shown in the figure comprises an optical element 1, a support structure 2 and an elastic pressing block 3; a supporting and fixing portion 15 is arranged on the outside of the optical element 1, the supporting and fixing portion 15 is connected to the inside of the support structure 2 through a mounting ring 5, an adjusting screw 17 is installed inside the supporting and fixing portion 15, and a supporting component for bearing the optical element 1 is arranged on the surface of the adjusting screw 17; a mounting base surface 7 is mounted on the top of the mounting ring 5, and the elastic pressing block 3 is movably mounted on the mounting base surface 7, and a clamping component 301 of the elastic pressing block 3 is pressed on the top of the optical element 1; an annular frame 25 is connected to the outer surface of the mounting ring 5, and a gear ring 27 is rotatably installed on the top of the annular frame 25, and the surface of the gear ring 27 meshes with the end of the transmission adjusting screw 17; an arc-shaped partition 8 is arranged on the outside of the gear ring 27, and a positioning component for locking the position of the gear ring 27 is movably connected to the surface of one side of the arc-shaped partition 8, and an I-shaped frame 6 is connected to the other side, and an adjusting and resetting component for transmitting the gear ring 27 is arranged inside the I-shaped frame 6.

[0028] It is worth noting that, through the coordinated arrangement of the elastic pressure block 3, the mounting ring 5, the support fixing part 15, the adjusting screw 17, the support assembly and the adjusting reset assembly structure, the optical element 1 is placed on the top of the support member 21, and the active bevel gear 34 can drive the connecting bevel gear 31 to drive by rotating the adjusting disk 35, so that the transmission gear 30 drives the gear ring 27 to rotate, thereby transmitting the driven gear 18, so as to achieve the effect of rotating the adjusting screw 17, so that the support member 21 slides on the surface of the guide plate 16 through the connecting seat 19, so as to control the axial height of the optical element 1 supported by the support member 21 to adjust and control, and the elastic pressure block 3 is fixed to the top of the mounting base 7 through the limiting component 302 and the fixing component 303, so that the pressing component 301 is pressed on the boss 101, and the optical element 1 is fixed, and the first magnet 23 on the surface of the connecting seat 19 cooperates with the second magnet 24 on the inner wall of the supporting fixing part 15, so as to effectively prevent the connecting seat 19 from loosening, thereby ensuring the accuracy and stability of the support for the optical element 1.

[0029] In addition, a boss 101 is provided on the outer side of the bottom of the optical element 1, and the elastic pressing block 3 includes a pressing component 301, a limiting component 302 and a fixing component 303. The bottom of the pressing component 301 is pressed against the surface of the boss 101, the limiting component 302 is movably connected to the top of the mounting base surface 7, and the fixing component 303 is installed on the top of the mounting base surface 7 through a fixing member. The end of the adjusting screw 17 is connected to a driven gear 18, the surface of the driven gear 18 is meshed and connected with the gear ring 27, the inner wall of the annular frame 25 is connected to a limiting ring 26, and the surface of the limiting ring 26 is rotatably connected to the outer side of the gear ring 27.

[0030] Specifically, the clamping component 301 is a clamping and positioning structure for installing the boss 101, the limiting component 302 serves as an assembly positioning and limiting structure for the elastic pressure block 3, and the fixing component 303 serves to fix the elastic pressure block 3. The clamping component 301 is a structure for fixing the boss 101 of the optical element 1, and the elastic pressure block 3 is distributed on the top of the mounting base surface 7 to ensure the stability of the optical element 1. The fixing points are symmetrically distributed in the form of three points, six points, etc. The main body of the support structure 2 is evenly distributed with three or six radial flexible sheets. The radial flexible sheet structure is mainly used to reduce the deformation of the optical element caused by thermal stress, and can also effectively eliminate the radial interference stress caused by over-constraint during the assembly and clamping process.

[0031] The support assembly includes: a connection seat 19 movably mounted on the surface of the adjusting screw rod 17, and a support member 21 connected to the end of the connection seat 19; wherein, guide plates 16 are connected to both sides of the inner wall of the support fixing portion 15, guide grooves 20 are provided on both sides of the connection seat 19, the inner wall of the guide groove 20 is slidably connected to the surface of the guide plate 16, and a flexible support plate 22 is connected to the bottom of the connection seat 19. The bottom of the flexible support plate 22 is connected to the surface of the base plate 4 through the mounting ring 5, a first magnet 23 is connected to one side of the connection seat 19, and a second magnet 24 matching the first magnet 23 is provided on the inner wall of the guide plate 16.

[0032] Furthermore, the adjusting screw rod 17 is a structure for adjusting the transmission of the connecting seat 19, the connecting seat 19 is a structure for connecting the support member 21, the guide plate 16 cooperates with the guide groove 20 to play a guiding and limiting role, the flexible support plate 22 is a structure that supports the connecting seat 19, and the first magnet 23 is a structure that cooperates with the second magnet 24, thereby preventing the connecting seat 19 from loosening and affecting the stability of the optical element 1.

[0033] The positioning assembly includes: a locking arc plate 12 meshingly connected to the top of the gear ring 27, and a limiting plate 13 connected to one side of the locking arc plate 12; wherein, a limiting groove 9 is provided on the surface of the arc-shaped partition plate 8, the limiting plate 13 is slidably connected to the inner wall of the limiting groove 9, an adjusting screw barrel 14 is connected to one side of the limiting plate 13, and the top of the adjusting screw barrel 14 is movably connected to the top of the supporting structure 2. The top of the locking arc plate 12 is slidably connected to the limiting rod 10, the surface of the limiting rod 10 is sleeved with a locking spring 11, the bottom end of the locking spring 11 is connected to the top of the locking arc plate 12, and the top of the limiting rod 10 is connected to the inner wall of the supporting structure 2.

[0034] In addition, the locking arc plate 12 is a structure that cooperates with the ring gear 27 to lock, so as to prevent the ring gear 27 from shaking. The limit plate 13 is a structure that serves as a limit guide for the locking arc plate 12. The adjusting screw 14 is a structure that controls the locking arc plate 12. The limit rod 10 serves as an assembly for the locking spring 11 and can limit the locking arc plate 12. The locking spring 11 is a structure that keeps the locking arc plate 12 locked with the ring gear 27.

[0035] The adjustment and reset assembly includes: a limit guide plate 28 connected to the inner wall of the I-shaped frame 6, and a limit baffle plate 32 slidably connected to the surface of the limit guide plate 28; wherein, the surface of the limit baffle plate 32 rotates to connect the adjustment rod 33, and the surface of the adjustment rod 33 and the upper part of the limit baffle plate 32 are installed with an active bevel gear 34. The surface of the I-shaped frame 6 is rotatably connected with a connecting rod 29, and the two ends of the connecting rod 29 are respectively connected with a transmission gear 30 and a connecting bevel gear 31, the surface of the transmission gear 30 meshes with the surface of the connecting gear ring 27, and the active bevel gear 34 meshes with the connecting bevel gear 31. The surface of the adjustment rod 33 is sleeved with a reset spring 37, the top of the reset spring 37 is connected to the bottom of the limit baffle plate 32, and a limit clamp plate 36 is arranged above the active bevel gear 34, the surface of the limit clamp plate 36 is movably clamped with the support structure 2, and the top of the adjustment rod 33 is connected with an adjustment disk 35.

[0036] Among them, the I-frame 6 is a structure for installing the connecting rod 29, and the transmission gear 30 is meshed and transmitted with the ring gear 27 through the connecting rod 29. The adjusting rod 33 is a structure for installing the active bevel gear 34. The limit baffle 32 is a structure for guiding and limiting the adjusting rod 33, thereby improving the stability of the structure. The active bevel gear 34 is a structure for transmitting the connecting bevel gear 31, thereby transmitting and adjusting the ring gear 27. The return spring 37 is a structure for acting on the limit baffle 32. The limit card plate 36 limits the adjusting rod 33. The adjusting disk 35 is used to rotate and adjust the adjusting rod 33. By pressing the adjusting disk 35, the active bevel gear 34 can be detached from the connecting bevel gear 31 to prevent the ring gear 27 from being affected. The return spring 37 ensures that the active bevel gear 34 is meshed with the connecting bevel gear 31, thereby improving the stability during adjustment.

[0037] Preferably, the optical element 1 is placed on the top of the support 21, and the active bevel gear 34 can be driven by rotating the adjustment disk 35 to drive the connecting bevel gear 31, so that the transmission gear 30 drives the ring gear 27 to rotate, thereby transmitting the driven gear 18, so as to achieve the effect of adjusting the screw rod 17 to rotate, so that the support 21 slides on the surface of the guide plate 16 through the connecting seat 19, so as to control the axial height of the optical element 1 supported by the support 21 to adjust and control, and the elastic pressure block 3 is fixed to the top of the installation base surface 7 through the limiting component 302 and the fixing component 303, so that the pressing component 301 is pressed on the boss 101, and the optical element 1 is fixed, and the connecting seat The first magnet 23 on the surface of 19 cooperates with the second magnet 24 on the inner wall of the supporting and fixing part 15, which can effectively prevent the connecting seat 19 from loosening and ensure the accuracy and stability of the support for the optical element 1; through the locking spring 11 on the surface of the limit rod 10, the locking arc plate 12 can be acted on, which can ensure that the locking spring 11 is pressed tightly on the top of the ring gear 27, and the position of the ring gear 27 is fixed to prevent the ring gear 27 from rotating on the top of the annular frame 25 through the limit ring 26 and shaking. By clamping the tool on the top of the adjusting screw barrel 14, the locking arc plate 12 can be controlled to fall off and lock the meshing of the ring gear 27, so as to facilitate the height control of the support member 21 by rotating the ring gear 27.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision support structure for optical elements, characterized in that: The optical element (1) comprises an optical element (1), a support structure (2) and an elastic pressing block (3); a support fixing portion (15) is arranged outside the optical element (1), the support fixing portion (15) is connected to the inside of the support structure (2) via a mounting ring (5), an adjusting screw (17) is installed inside the support fixing portion (15), and a supporting component for supporting the optical element (1) is arranged on the surface of the adjusting screw (17); A mounting base (7) mounted on the top of the mounting ring (5), the elastic pressing block (3) being movably mounted on the mounting base (7), and a pressing component (301) of the elastic pressing block (3) pressing on the top of the optical element (1); An annular frame (25) is connected to the outer surface of the mounting ring (5), a gear ring (27) is rotatably mounted on the top of the annular frame (25), and the surface of the gear ring (27) meshes with the end of the transmission adjustment screw rod (17); An arc-shaped partition (8) is arranged on the outer side of the gear ring (27), and a positioning component for locking the position of the gear ring (27) is movably connected to the surface of one side of the arc-shaped partition (8), and an I-shaped frame (6) is connected to the other side of the arc-shaped partition (8), and an adjusting and resetting component for transmitting the gear ring (27) is arranged inside the I-shaped frame (6).

2. The high-precision support structure for optical elements according to claim 1, characterized in that: A boss (101) is arranged on the outer side of the bottom of the optical element (1); the elastic pressure block (3) comprises a pressing component (301), a limiting component (302) and a fixing component (303); the bottom of the pressing component (301) is pressed against the surface of the boss (101); the limiting component (302) is movably connected to the top of the mounting base (7); and the fixing component (303) is mounted on the top of the mounting base (7) via a fixing member.

3. The high-precision support structure for optical elements according to claim 1, characterized in that: The support assembly comprises: a connecting seat (19) movably mounted on the surface of the adjusting screw rod (17), and A support member (21) connected to the end of the connection seat (19); Wherein, guide plates (16) are connected to both sides of the inner wall of the supporting and fixing portion (15), guide grooves (20) are opened on both sides of the connecting seat (19), the inner wall of the guide groove (20) is slidably connected to the surface of the guide plate (16), and the bottom of the connecting seat (19) is connected to a flexible supporting plate (22).

4. The high-precision support structure for optical elements according to claim 3, characterized in that: The bottom of the flexible support plate (22) is connected to the surface of the base plate (4) via a mounting ring (5), one side of the connecting seat (19) is connected to a first magnet (23), and the inner wall of the guide plate (16) is provided with a second magnet (24) matching the first magnet (23).

5. The high-precision support structure for optical elements according to claim 1, characterized in that: The end of the adjusting screw rod (17) is connected to a driven gear (18), the surface of the driven gear (18) is meshedly connected to the gear ring (27), the inner wall of the annular frame (25) is connected to a limit ring (26), and the surface of the limit ring (26) is rotatably connected to the outer side of the gear ring (27).

6. The high-precision support structure for optical elements according to claim 1, characterized in that: The positioning component includes: A locking arc plate (12) meshingly connected to the top of the gear ring (27), and A limiting plate (13) connected to one side of the locking arc plate (12); A limiting groove (9) is provided on the surface of the arc-shaped partition (8), the limiting plate (13) is slidably connected to the inner wall of the limiting groove (9), one side of the limiting plate (13) is connected to an adjusting screw barrel (14), and the top end of the adjusting screw barrel (14) is movably connected to the top of the supporting structure (2).

7. The high-precision support structure for optical elements according to claim 6, characterized in that: The top of the locking arc plate (12) is slidably connected to a limiting rod (10), a locking spring (11) is sleeved on the surface of the limiting rod (10), the bottom end of the locking spring (11) is connected to the top of the locking arc plate (12), and the top end of the limiting rod (10) is connected to the inner wall of the supporting structure (2).

8. The high-precision support structure for optical elements according to claim 1, characterized in that: The adjustment and reset component comprises: a limiting guide plate (28) connected to the inner wall of the I-shaped frame (6), and A limit baffle (32) slidably connected to the surface of the limit guide plate (28); The surface of the limit baffle (32) is connected to the adjustment rod (33), and a driving bevel gear (34) is installed on the surface of the adjustment rod (33) and located above the limit baffle (32).

9. The high-precision support structure for optical elements according to claim 8, characterized in that: The surface of the I-shaped frame (6) is rotatably connected to a connecting rod (29), and the two ends of the connecting rod (29) are respectively connected to a transmission gear (30) and a connecting bevel gear (31), the surface of the transmission gear (30) is meshed with the surface of the connecting gear ring (27), and the active bevel gear (34) is meshed and connected with the connecting bevel gear (31).

10. The high-precision support structure for optical elements according to claim 9, characterized in that: A return spring (37) is sleeved on the surface of the adjusting rod (33), the top end of the return spring (37) is connected to the bottom of the limit baffle (32), a limit clamping plate (36) is arranged above the active bevel gear (34), the surface of the limit clamping plate (36) is movably connected to the support structure (2), and the top end of the adjusting rod (33) is connected to an adjusting disk (35).

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