Optical element three-degree-of-freedom detection device

Abstract

The present invention discloses a three-degree-of-freedom detection device for optical elements, including an optical platform, on which an instrument platform and an element frame are arranged opposite to each other, the instrument platform is rotatably supported on the optical platform by a rotation adjustment module, the angle of the instrument platform relative to the element frame can be adjusted by the rotation adjustment module, the element frame is movably supported on the optical platform by a yaw base, and a pitch adjustment module and a yaw adjustment module are arranged between the element frame and the yaw base, and the pitch and yaw angles of the element frame can be adjusted by the pitch adjustment module and the yaw adjustment module. Through the separate adjustment module, the supporting structure of the optical instrument and the optical element is fully utilized, the overall structure is simple and easy, the processing speed is fast, and the safety and reliability are high, which can meet the rapid detection requirements of large-scale, large-caliber, diversified, high-precision, high-efficiency and high-cleanliness of the optical elements of the laser device.

Description

Technical Field

[0001] The present invention relates to the technical field of optical element detection, and in particular to a three-degree-of-freedom detection device for an optical element. Background Art

[0002] In large-scale laser devices, in order to obtain laser beams with sufficient energy, there is an urgent need for large-scale, large-caliber, diversified, high-precision and high-cleanliness rapid detection of optical components. Traditional detection platforms usually integrate and install three-degree-of-freedom adjustment mechanisms together, which greatly increases the complexity of the mechanism. Some existing detection platform mechanisms are relatively complex and have relatively high production costs. In addition, even if the three-degree-of-freedom adjustment mechanisms are designed into the support structure of the optical component, due to the certain height difference between the optical component and the optical instrument, a certain support structure is still required between the optical instrument and the optical platform to ensure that the center of the optical component and the optical instrument are in the same horizontal plane. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a three-degree-of-freedom detection device for an optical element, so as to simplify the adjustment structure of each degree of freedom on a detection platform and improve the adaptability of the detection platform.

[0004] To achieve the above purpose, the technical solution of the present invention is as follows:

[0005] A three-degree-of-freedom detection device for an optical element includes an optical platform, and the key points are: including an optical platform, characterized in that: an instrument platform and an element frame are arranged opposite to each other on the optical platform, the instrument platform is rotatably supported on the optical platform by a rotation adjustment module, the angle of the instrument platform relative to the element frame can be adjusted by the rotation adjustment module, the element frame is movably supported on the optical platform by a yaw base, and a pitch adjustment module and a yaw adjustment module are arranged between the element frame and the yaw base, and the pitch and yaw angles of the element frame can be adjusted by the pitch adjustment module and the yaw adjustment module.

[0006] By adopting the above structure, the adjustment mechanisms of the three degrees of freedom required in the adjustment process of the optical element are separated from each other through a mutually separated layout, thereby avoiding the complexity caused by integrating the mechanisms together, saving design and manufacturing costs, and being more convenient to use and operate.

[0007] Preferably, the rotation adjustment module comprises two fixed pillars and at least one telescopic pillar, and the fixed pillars and the telescopic pillars are both vertically arranged on the optical platform and are respectively located at the left and right ends of the instrument platform;

[0008] The upper end of the fixed support is hinged to the instrument platform. The telescopic support is hollow and provided with an adjustment screw. The upper end of the adjustment screw is hinged to the instrument platform and the lower end extends into the telescopic support. An adjustment nut is rotatably installed on the upper end of the telescopic support, and the adjustment nut cooperates with the adjustment screw thread.

[0009] By adopting the above structure, the separate design can simplify the optical component support structure while reasonably utilizing the optical instrument support structure, which can not only support the optical instrument, but also realize the rotation adjustment of the optical instrument. The overall structure is simple and easy, the processing speed is fast, and the installation and use are convenient.

[0010] As a preference: a rotating connection frame is provided on the lower surface of the instrument platform at a position corresponding to the fixed support, the rotating connection frame is provided with a rotating connection shaft, and the fixed support is hinged to the rotating connection frame through the rotating connection shaft;

[0011] An adjustment connecting frame is provided at a position corresponding to the adjustment screw rod on the lower surface of the instrument platform. The adjustment connecting frame has two symmetrically arranged supporting ears, which extend downward. An adjustment connecting shaft is passed through the two supporting ears. The adjustment screw rod is hinged to the adjustment connecting frame through the adjustment connecting shaft. The rotating connecting shaft and the adjustment connecting shaft are both arranged along the length direction of the optical platform.

[0012] The above solution can make the support of the optical instrument more stable and the rotation adjustment process more stable and reliable, which is conducive to improving the detection accuracy.

[0013] Preferably, the deflection base and the component frame are both rectangular frame structures, on which a deflection frame is rotatably supported by a vertical rotation shaft, the deflection frame is a "U"-shaped structure with an opening facing upward, and the component frame is rotatably supported on the upper end of the deflection frame by horizontal rotation shafts symmetrically arranged on both sides;

[0014] The pitch adjustment module includes pitch pressure blocks symmetrically arranged on the left and right sides of the yaw frame, and the pitch pressure blocks are symmetrically distributed along the thickness direction of the yaw frame. The pitch pressure block has an extension part A extending horizontally inward, and a gap is left between the extension part A and the component frame. The extension part A has a pitch adjustment pin arranged facing the component frame.

[0015] By adopting the above scheme, the pitch adjustment of the optical element in the element frame can be achieved by screwing the pitch adjustment pin and adjusting its screwing depth. At the same time, the pitch pressure block symmetrically arranged front and back and the corresponding pitch adjustment pin can form a front and back clamping state for the element frame to avoid shaking of the element frame when pitching, which is beneficial to maintaining the position stability of the component frame and further improving the detection accuracy.

[0016] Preferably, the front end of the pitch adjustment pin has a pitch adjustment rubber head. In the above scheme, the pitch adjustment rubber head is usually hemispherical and made of polytetrafluoroethylene material, which can increase the friction between the component frame and the gap while the contact area between the gap and the component frame, so as to prevent the relative sliding between the component frame and the pitch adjustment pin from being too easy, which may cause shaking.

[0017] As a preferred embodiment: a horizontal axis base is fixedly arranged at the side of the element frame facing the horizontal axis, the upper end of the yaw frame has an arc-shaped groove arranged along its width direction, the horizontal axis is embedded in the corresponding arc-shaped groove, and one end is fixedly connected to the horizontal axis base, and a horizontal axis pressure block adapted to the horizontal axis is arranged at the upper end of the yaw frame. The above structure is conducive to enhancing the stability of the element frame when it undergoes pitch rotation, and is more convenient for installing and fixing the element frame, thereby improving the detection efficiency.

[0018] As a preferred embodiment, the vertical shaft is located in the middle of the yaw base, bearings are provided on the yaw base at the upper and lower ends of the vertical shaft, a tray is provided at the upper end of the vertical shaft, and a yaw frame connection hole is provided at the yaw frame corresponding to the vertical shaft. The above structure improves the smoothness of the yaw frame rotation, facilitates the replacement of the yaw adjustment, and reduces the difficulty of yaw adjustment.

[0019] Preferably, the left and right ends of the deflection base have mounting parts extending vertically upward, the deflection frame is located between the two mounting parts, and a gap is left between the mounting parts and the left and right ends of the deflection frame;

[0020] The yaw adjustment module includes a yaw pressure block, one end of which is fixed on the yaw frame, and the other end of which extends horizontally outward, and has an extension portion B arranged opposite to the front or rear side of the mounting portion, and the extension portion B has a yaw adjustment nail arranged opposite to the mounting portion, and the yaw adjustment nail is threadedly matched with the extension portion B;

[0021] A deflection spring is provided between the mounting portion and the extending portion B facing the mounting portion. The deflection spring is provided along the length direction of the deflection adjustment pin, and two ends of the deflection spring are fixed on the mounting portion and the extending portion B respectively.

[0022] By adopting the above scheme, a flexible clamping mechanism is formed by the deflection spring and the deflection adjustment pin. In the initial state, the deflection spring is in a pre-compression state, so that the deflection adjustment pins on both sides are in contact with the mounting portion. In this way, during the adjustment of the deflection adjustment pin, the deflection spring always flexibly tightens the deflection frame during this process, so that the deflection adjustment process can be continuously adjusted under the premise of a certain pre-tightening force, avoiding the adjustment process from being unsmooth, and the adjustment is simple and easy. In addition, the optical element is always in a pre-tightening state to a certain extent during the adjustment process, which is beneficial to protect the optical element from accidental damage during the detection process, and at the same time avoids stress damage to the optical element and the mechanism itself due to asymmetric force caused by rigid connection.

[0023] As a preferred embodiment, the front end of the deflection adjustment nail has a deflection adjustment rubber head. With the above structure, after the adjustment is completed, the deflection frame can be kept in a stable state by relying on the friction force of the rubber head to reduce shaking.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The optical element three-degree-of-freedom detection device provided by the present invention fully utilizes the supporting structure of the optical instrument and the optical element through a separate adjustment module. The overall structure is simple and easy to operate, the processing speed is fast, and the safety and reliability are high. It can meet the rapid detection requirements of large-scale, large-caliber, diversified, high-precision, high-efficiency and high-cleanliness of optical elements of laser devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 for Figure 1 A schematic diagram of the structure of the rotation adjustment module in the embodiment shown;

[0028] Figure 3 It is a schematic diagram of the component frame installation structure;

[0029] Figure 4 This is a schematic diagram of the structure of the yaw adjustment module;

[0030] Figure 5 This is a schematic diagram of the installation structure of the yaw frame;

[0031] Figure 6 It is a schematic diagram of the yaw base structure;

[0032] Figure 7 This is a schematic diagram of the use status of the present invention. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with embodiments and drawings.

[0034] refer to Figures 1 to 7 The optical element three-degree-of-freedom detection device shown mainly includes an optical platform 1 and an instrument platform 2, both of which are plate-like structures, and a component frame 3 and a yaw base 4, both of which are rectangular frame structures. As shown in the figure, the optical platform 1 mainly plays the role of a base for installing and fixing the remaining components, and an array of mounting holes is distributed thereon. When in use, the instrument platform 2 is used to place the optical instrument 7, and the component frame 3 is used to place the optical element 8, and the center of the optical instrument 7 and the center of the optical element 8 are required to be in the same horizontal plane, so it is inferred that the optical platform 1 should be set directly opposite the component frame 3.

[0035] As shown in the figure, in this embodiment, the instrument platform 2 and the component frame 3 are arranged along the front and rear length direction of the optical platform 1. The instrument platform 2 is supported on the optical platform 1 through a rotation adjustment module. The rotation adjustment module mainly includes two fixed pillars 10 and at least one telescopic pillar 11. The fixed pillars 10 and the telescopic pillars 11 are both vertically arranged and are respectively located at the left and right ends of the instrument platform 2. The two fixed pillars 10 are symmetrically arranged along the left and right length directions of the instrument platform 2. The telescopic pillar 11 is located in the middle of the other end of the instrument platform 2, and it and the two fixed pillars 10 form an isosceles triangle support structure.

[0036] A downwardly extending rotating connecting frame 20 is provided at a position corresponding to the fixed pillar 10 on the lower surface of the instrument platform 2. A rotating connecting frame 20 is provided with a rotating connecting shaft 21. The upper end of the fixed pillar 10 is rotatably mounted on the rotating connecting shaft 21, thereby realizing an articulated connection with the instrument platform 2.

[0037] An adjustment connecting frame 22 is provided at a position corresponding to the telescopic support column 11 on the lower surface of the instrument platform 2. The adjustment connecting frame 22 has two symmetrically arranged support ears 220, and there is a gap between the two support ears 220. An adjustment connecting shaft 23 is passed through the two support ears 220. The adjustment connecting shaft 23 and the rotating connecting shaft 21 are both arranged along the length direction of the optical platform 1. The telescopic support column 11 is a hollow structure with an open upper end, and an adjustment screw rod 12 is provided at its upper end. The upper end of the adjustment screw rod 12 is flatly sleeved on the adjustment connecting shaft 23 and is located between the two support ears 220. The lower end of the adjustment screw rod 12 extends into the telescopic support column 11, and an adjustment nut 13 matched with the adjustment screw rod 12 is provided at the upper end of the telescopic support column 11. The adjustment nut 13 is threadedly matched with the adjustment screw rod 12 and is rotatably connected to the upper end of the telescopic support column 11. In this way, when the adjustment nut 13 is rotated, the adjustment screw rod 12 can be lifted and lowered, thereby realizing the rotation fine-tuning of the instrument platform 2 on the left and right vertical planes.

[0038] As shown in the figure, the deflection base 4 and the element frame 3 are both rectangular frame structures. The left and right ends of the lower part of the deflection base 4 have symmetrically arranged deflection base mounting plates, and the deflection base 4 can be fixed on the optical platform 1 through the deflection base mounting plates. The left and right ends of the deflection base 4 shown have mounting parts 41 extending vertically upward, and the mounting parts 41 at both ends are symmetrically arranged. The deflection frame 5 is a "U"-shaped open rectangular frame structure, which is located between the two mountings 41. The deflection frame 5 is rotatably supported on the optical platform 1 through a vertical shaft 40. On the yaw base 4, the vertical rotation axis 40 is located in the middle of the yaw base 4, and bearings 42 are provided at the upper and lower ends of the yaw base 4 corresponding to the positions of the vertical rotation axis 40. A tray 400 is provided after the upper end of the vertical rotation axis 40 passes through the yaw base 4. The tray 400 is concentrically arranged with the vertical rotation axis 40, and its radius is larger than the vertical rotation axis 40. A yaw connecting hole 55 is provided on the yaw frame 5 at a position opposite to the vertical rotation axis 40, and the upper end of the vertical rotation axis 40 extends into the yaw connecting hole 55, and the yaw frame 5 is rotatably supported on the tray 400.

[0039] Two swing pressure blocks 53 are symmetrically provided on both sides of the lower end of the swing frame 5 near the mounting part 41. The swing pressure blocks 53 are vertically arranged in an "L"-shaped block structure, one end of which is fixed on the swing frame 5, and the other end extends toward the end where the mounting part 41 is located, forming an extension part B530 facing the front surface of the mounting part 41. The extension part B530 is provided with a swing adjustment nail 54 which is threadedly matched with the extension part B530. The swing adjustment nail 54 is arranged facing the front surface of the mounting part 41 with a certain gap therebetween and passes through both sides of the extension part B530 in the thickness direction. The end close to the mounting part 41 is provided with a swing adjustment rubber head 540, which is a hemispherical component made of polytetrafluoroethylene material. The main body of the swing adjustment nail 54 can be a metal part, and the swing adjustment rubber head 540 can be fixed to the end of the swing adjustment nail 54 close to the mounting part 41 by gluing.

[0040] At the same time, a sway spring 6 is also provided between the extension part B530 and the mounting part 41. As shown in the figure, the sway spring 6 is arranged along the length direction of the sway adjustment pin 54. The extension part B530 and the corresponding positions on the mounting part 41 are provided with square holes running through the thickness direction thereof. A sway pressure block pin 531 is vertically penetrated in the square hole of the extension part B530, and a sway base pin 410 is horizontally penetrated in the square hole of the mounting part 41. The two ends of the sway spring 6 are respectively fixed on the sway pressure block pin 531 and the sway base pin 410. In the initial state, the sway spring 6 is in a pre-tightened state, and the sway adjustment rubber heads 540 of the two sway adjustment pins 54 are both in contact with the mounting part 41. The sway adjustment pin 54 and the sway spring 6 simultaneously constitute a flexible sway adjustment module.

[0041] In the actual design and manufacturing process, it is also possible to arrange the yaw pressure block 53 on the rear side of the yaw frame 5 so that the extension portion B530 faces the rear side surface of the mounting portion 41 .

[0042] A horizontal base 31 is removably installed on the outer walls in the middle of the left and right sides of the element frame 3. The horizontal base 31 has a horizontal rotation axis 30 extending outward along the width direction of the element frame 3. The upper ends of the left and right sides of the yaw frame 5 have arc-shaped grooves arranged along their width direction. The outer ends of the horizontal rotation axis 30 are embedded in the corresponding arc-shaped grooves. Horizontal axis pressure blocks 52 are provided at the positions corresponding to the arc-shaped grooves on the yaw frame 5. The horizontal axis pressure blocks 52 are adapted to the contour of the horizontal rotation axis 30 and can form a circular hole shape with the arc-shaped grooves to radially press the horizontal rotation axis 30 to prevent it from withdrawing from the arc-shaped grooves, thereby ensuring that the element frame 3 can rotate with the horizontal rotation axis 30 as the rotation center.

[0043] The pitch adjustment module mainly includes a pitch pressure block 50 arranged on the yaw frame 5. A group of pitch pressure blocks 50 are symmetrically arranged at the left and right ends of the yaw frame 5. A group of pitch pressure blocks 50 has two pitch pressure blocks 50, which are symmetrically arranged on the front and rear sides of the yaw frame 5. The shape of the pitch pressure block 50 is similar to that of the yaw pressure block 53. The difference is that one end of the pitch pressure block 50 extends toward the internal component frame 3 to form an extension part A500. The extension part A500 is directly opposite to the front side wall surface or the rear side wall surface of the adjacent component frame 3, and a certain gap is left accordingly. A pitch adjustment nail 51 is provided on the extension part A500. The pitch adjustment nail 51 is arranged along the length direction of the optical platform 1 and is directly opposite to the side wall of the component frame 3. It is threadedly matched with the corresponding extension part A500. The end of the pitch adjustment nail 51 close to the component frame 3 has a pitch adjustment rubber head 510, and the pitch adjustment rubber head 510 is similar to the yaw adjustment rubber head 540.

[0044] refer to Figures 1 to 7 When in use, the optical instrument 7 is fixed on the instrument platform 2, and the optical element 8 is installed in the element frame 3. Then, the adjusting nut 13 can be rotated to make the adjusting screw 12 move up and down, so that the instrument platform 2 can be rotated around the two rotating connecting shafts 21, thereby realizing the rotation adjustment of the surface normals of the optical instrument 7 and the optical element 8.

[0045] By simultaneously adjusting the pitch adjustment pins 51 located on the same side of the yaw frame 5, the component frame 3 can be made to pitch and rotate in the front-to-back direction. After the pitch adjustment pins 51 on one side are adjusted into place, the pitch adjustment pins 51 on the other side are adjusted, and then the component frame 3 is clamped by the pitch adjustment pins 51 facing each other on the front and rear sides, thereby fully ensuring the stability of the component frame 3 and preventing it from shaking.

[0046] Because in the initial state, the swing spring 6 is in a pre-tightened state, the swing adjustment rubber heads 540 of the two swing adjustment pins 54 are both in contact with the mounting portion 41. Therefore, when performing the swing adjustment, firstly twist the swing adjustment pin 54 on one side to screw it inward, which can push the swing frame 5 on that side to rotate backward. The swing spring 6 on that side is in a continuously tightened state, while the swing adjustment pin 54 on the other side is always in contact with the swing frame 5. The swing spring 6 on the other side is in a relatively released or stretched state, ensuring flexible and continuous adjustment of the entire swing adjustment process with good stability.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A three-degree-of-freedom detection device for an optical element, comprising an optical platform (1), characterized in that: An instrument platform (2) and a component frame (3) are arranged opposite to the optical platform (1); the instrument platform (2) is rotatably supported on the optical platform (1) by a rotation adjustment module; the angle of the instrument platform (2) relative to the component frame (3) can be adjusted by the rotation adjustment module; the component frame (3) is movably supported on the optical platform (1) by a yaw base (4); a pitch adjustment module and a yaw adjustment module are arranged between the component frame (3) and the yaw base (4); the pitch adjustment module and the yaw adjustment module can be used to adjust the pitch and yaw angles of the component frame (3); The deflection base (4) and the element frame (3) are both rectangular frame structures, on which a deflection frame (5) is rotatably supported via a vertical rotation shaft (40); the deflection frame (5) is a "U"-shaped structure with an opening facing upward, and the element frame (3) is rotatably supported on the upper end of the deflection frame (5) via horizontal rotation shafts (30) symmetrically arranged on both sides; The horizontal base (31) is detachably mounted on the outer wall of the middle part of the left and right sides of the element frame (3), and the horizontal base (31) has a horizontal rotating shaft (30) extending outward along the width direction of the element frame (3). The upper ends of the left and right sides of the yaw frame (5) have arc-shaped grooves arranged along the width direction thereof, and the outer ends of the horizontal rotating shaft (30) are embedded in the corresponding arc-shaped grooves. The positions of the corresponding arc-shaped grooves on the yaw frame (5) are provided with horizontal shaft pressing blocks (52), which are adapted to the contour of the horizontal rotating shaft (30) and are surrounded by the arc-shaped grooves to form a circular hole shape, radially press the horizontal rotating shaft (30) to prevent it from withdrawing from the arc-shaped groove, thereby ensuring that the element frame (3) rotates with the horizontal rotating shaft (30) as the rotation center; The pitch adjustment module comprises a pitch pressure block (50) arranged on the yaw frame (5), a group of pitch pressure blocks (50) are symmetrically arranged at both left and right ends of the yaw frame (5), a group of pitch pressure blocks (50) has two, symmetrically arranged at the front and rear sides of the yaw frame (5), the shape of the pitch pressure block (50) is similar to that of the yaw pressure block (53), one end of the pitch pressure block (50) extends toward the internal component frame (3) to form an extension part A (500), and the extension part A (500) is adjacent to the frame of the component frame (3). The front side wall surface or the rear side wall surface is directly opposite to each other and a certain gap is left therebetween. A pitch adjustment nail (51) is provided on the extension part A (500). The pitch adjustment nail (51) is arranged along the length direction of the optical platform (1) and directly opposite to the side wall of the component frame (3). The pitch adjustment nail (51) is threadedly matched with the corresponding extension part A (500). The end of the pitch adjustment nail (51) close to the component frame (3) is provided with a pitch adjustment rubber head (510). The pitch adjustment rubber head (510) is similar to the yaw adjustment rubber head (540). The rotation adjustment module comprises two fixed pillars (10) and at least one telescopic pillar (11), wherein the fixed pillars (10) and the telescopic pillar (11) are both vertically arranged on the optical platform (1) and are respectively located at the left and right ends of the instrument platform (2); The upper end of the fixed support (10) is hinged to the instrument platform (2); the telescopic support (11) is hollow and provided with an adjusting screw (12); the upper end of the adjusting screw (12) is hinged to the instrument platform (2), and the lower end extends into the telescopic support (11); an adjusting nut (13) is rotatably mounted on the upper end of the telescopic support (11); the adjusting nut (13) is threadably matched with the adjusting screw (12); The lower surface of the instrument platform (2) is provided with a rotating connection frame (20) at a position corresponding to the fixed support (10), and the rotating connection frame (20) is provided with a rotating connection shaft (21), and the fixed support (10) is hinged to the rotating connection frame (20) via the rotating connection shaft (21); An adjustment connecting frame (22) is provided on the lower surface of the instrument platform (2) at a position corresponding to the adjustment screw rod (12); the adjustment connecting frame (22) has two symmetrically arranged support ears (220); the support ears (220) extend downwards; an adjustment connecting shaft (23) is passed through the two support ears (220); the adjustment screw rod (12) is hingedly connected to the adjustment connecting frame (22) via the adjustment connecting shaft (23); and the rotation connecting shaft (21) and the adjustment connecting shaft (23) are both arranged along the length direction of the optical platform (1); The vertical rotating shaft (40) is located in the middle of the yaw base (4), bearings are provided on the yaw base (4) at the upper and lower ends corresponding to the vertical rotating shaft (40), the upper end of the vertical rotating shaft (40) has a tray, and the yaw frame (5) is provided with a yaw frame connecting hole (55) at the position corresponding to the vertical rotating shaft (40); The left and right ends of the deflection base (4) are provided with mounting parts (41) extending vertically upwards, the deflection frame (5) is located between the two mounting parts (41), and a gap is left between the mounting parts (41) and the left and right ends of the deflection frame (5); The yaw adjustment module comprises a yaw pressure block (53), one end of the yaw pressure block (53) is fixed on the yaw frame (5), the other end of the yaw pressure block (53) extends horizontally outward, and has an extension portion B (530) arranged opposite to the front side or the rear side of the mounting portion (41), the extension portion B (530) has a yaw adjustment pin (54) arranged opposite to the mounting portion (41), and the yaw adjustment pin (54) is threadedly matched with the extension portion B (530); A deflection spring (6) is provided between the mounting portion (41) and the extending portion B (530) facing the mounting portion (41), and the deflection spring (6) is provided along the length direction of the deflection adjustment pin (54), and its two ends are respectively fixed on the mounting portion (41) and the extending portion B (530); The front end of the sway adjustment nail (54) is provided with a sway adjustment rubber head (540).

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