Position adjusting base for compact range reflecting surface

Abstract

The utility model relates to a position adjusting base for a compact range reflecting surface. The position adjusting base comprises a base (1), a first adjusting piece (2) installed in the base (1) and a second adjusting piece (3) installed on the first adjusting piece (2). The base (1) comprises a base body (11), a first driving piece (12) and a second driving piece (13), wherein the first driving piece (12) and the second driving piece (13) are arranged in the circumferential direction of the base body (11). The first driving piece (12) is arranged opposite to the side wall of the first adjusting piece (2) and used for driving the first adjusting piece (2) to reciprocate in the first direction; the first driving piece (12) is arranged opposite to the side wall of the second adjusting piece (3) so as to drive the second adjusting piece (3) to reciprocate in the second direction; the first direction is perpendicular to the second direction; an embedding groove (31) is formed in the upper side of the second adjusting piece (3).

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic measurement, in particular to a position adjustment base for a compact range reflector. Background Art

[0002] Since the emergence of compact range electromagnetic measurement technology in the 1960s and 1970s of the 20th century, with the advantages of being unaffected by weather and interference clutter, requiring a smaller test site, and having good measurement consistency, it has gradually replaced the traditional far-field measurement method and become the main measurement means for electromagnetic characteristic parameters of various scatterers and radiators.

[0003] The core component of a compact range is a reflector. Due to the relatively large overall shape and heavy weight of the reflector, it is usually fixed in the compact range by a fixed connection method. Furthermore, this setting method makes it difficult to flexibly adjust the position of the reflector in the compact range, resulting in a large limitation on the measurement effect of the compact range using the reflector.

[0004] Currently, the reflector is usually installed by a hoisting method, and this installation method has a large limitation on the weight requirement of the reflector. Therefore, for the installation of a larger weight reflector, the bottom of the reflector needs to be supported accordingly, and a simple support structure is difficult to meet the flexible adjustment of the reflector. Therefore, there is an urgent need for a support structure that can fully meet the flexible adjustment of a large weight reflector. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a position adjustment base for a compact range reflector.

[0006] To achieve the above utility model purpose, the utility model provides a position adjustment base for a compact range reflector, including: a base, a first adjustment member installed in the base, and a second adjustment member installed on the first adjustment member;

[0007] The base includes: a base body, a first driving member and a second driving member arranged circumferentially on the base body;

[0008] The first driving member is arranged opposite to the side wall of the first adjustment member to drive the first adjustment member to reciprocate in a first direction;

[0009] The first driving member is arranged opposite to the side wall of the second adjustment member to drive the second adjustment member to reciprocate in a second direction;

[0010] The first direction and the second direction are arranged perpendicular to each other;

[0011] A fitting groove is arranged on the upper side of the second adjustment member.

[0012] According to one aspect of the present utility model, in the first direction, the second adjusting member can swing freely relative to the first adjusting member.

[0013] According to one aspect of the present utility model, the first adjusting member includes: a first adjusting base body and a supporting roller disposed on the first adjusting base body;

[0014] Along the second direction, arc-shaped supporting plates are respectively disposed at opposite ends of the first adjusting base body;

[0015] Along the extending direction of the arc-shaped supporting plate, a plurality of the supporting rollers are sequentially rotatably disposed;

[0016] The outer side surface of the second adjusting member is an arc surface, and the second adjusting member is arranged to contact the supporting roller based on the outer side surface.

[0017] According to one aspect of the present utility model, the first adjusting base body includes: two first adjusting parts;

[0018] The two first adjusting parts are symmetrically arranged;

[0019] The arc-shaped supporting plate includes: two arc-shaped plate parts;

[0020] Along the second direction, the arc-shaped plate parts are disposed at opposite ends of the first adjusting part.

[0021] According to one aspect of the present utility model, on the arc-shaped plate part, a plurality of the supporting rollers are arranged along an arc track;

[0022] The center of the arc track coincides with the central axis of the outer side surface of the second adjusting member; or, the center of the arc track is offset from the central axis of the outer side surface of the second adjusting member.

[0023] According to one aspect of the present utility model, on the arc-shaped plate part, the diameters of the plurality of the supporting rollers are the same, or, along the direction from top to bottom, the diameters of the plurality of the supporting rollers gradually decrease.

[0024] According to one aspect of the present utility model, the base body includes: a bottom plate and a vertical support fixedly supported on the bottom plate;

[0025] Along the circumferential direction of the bottom plate, the vertical support is a sequentially arranged plate body;

[0026] The first driving member and the second driving member are respectively connected to the vertical support by screw threads.

[0027] According to one aspect of the present utility model, along the circumferential direction of the bottom plate, a plurality of the vertical supports are sequentially fixedly connected to form an annular structure.

[0028] According to one aspect of the present utility model, the surface roughness of the outer surface of the second adjusting member in contact with the support roller satisfies: Ra < 0.8 μm;

[0029] The surface roughness of the outer surface of the support roller in contact with the second adjusting member satisfies: Ra < 0.8 μm.

[0030] According to one aspect of the present utility model, along the axial direction of the support roller, a plurality of annular grooves are arranged at intervals on the outer side surface of the support roller.

[0031] According to one solution of the present utility model, the present utility model can realize flexible adjustment of the position in the horizontal direction through the provided first adjusting member, second adjusting member, first driving member and second driving member, so as to achieve accurate and flexible position adjustment.

[0032] According to one solution of the present utility model, by adopting symmetrically arranged first adjusting parts, stable support for the relative two sides of the second adjusting member can be symmetrically realized. Thus, it is more convenient and flexible for the second adjusting member to adapt to the change of its angle. In addition, through the provided arc plate parts, a notch can be formed between the two arc plate parts to achieve avoidance of the end part of the second adjusting member, so that the sliding range of the second adjusting member is wider, and interference between the second adjusting member and the first adjusting member can be avoided.

[0033] According to one solution of the present utility model, based on the setting that the outer surface of the support roller is flush with or exceeds the edge of the arc plate part, flexible adjustment of the position in the second direction can be more conveniently realized, so as to effectively improve the adjustment flexibility of the present utility model.

[0034] Through the above settings, the present utility model can accurately control the position of the second adjusting member in the first direction by setting the first adjusting seat body as two symmetric first adjusting parts and controlling the synchronous movement of the two first adjusting parts in the horizontal direction. In addition, by controlling the interval between the two opposite first adjusting parts, flexible and accurate adjustment of the position of the second adjusting member in the vertical direction can be realized. Thus, the present utility model realizes accurate and flexible position adjustment of the second adjusting member based on a simple structure.

[0035] According to a solution of the present utility model, setting multiple vertical supports in a ring structure can further effectively increase the structural strength of the multiple vertical supports, so that the first driving member and the second driving member have reliable supports to achieve stable adjustment of the first adjusting member and the second adjusting member. In addition, by sequentially fixedly connecting the multiple vertical supports to form a ring structure, it is more convenient to enclose each structure therein to ensure internal and external isolation. Thus, the intrusion of external impurities, particulate matters, etc. can be effectively avoided, which is more beneficial to ensuring the dimensional accuracy of the support position.

[0036] According to a solution of the present utility model, it effectively ensures that the contact position is a mirror surface, thereby fully reducing the frictional force of relative movement, which is convenient for the present utility model to carry and adjust large loads. In addition, by setting the contact position as a mirror surface, the accuracy of the installation position can be effectively ensured, which is more beneficial to ensuring the support and adjustment accuracy of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic structural diagram showing the cooperation between a position adjustment base and an external connection base according to an embodiment of the present utility model;

[0038] Figure 2 is a schematic perspective view of a position adjustment base according to an embodiment of the present utility model;

[0039] Figure 3 is a schematic top view of a position adjustment base according to an embodiment of the present utility model;

[0040] Figure 4 is a schematic cross-sectional view of the A-A position according to an embodiment of the present utility model;

[0041] Figure 5 is a schematic structural diagram of a first adjustment part according to an embodiment of the present utility model;

[0042] Figure 6 is a schematic cross-sectional view of the A-A position according to another embodiment of the present utility model;

[0043] Figure 7 is a schematic cross-sectional view of the A-A position according to still another embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0045] When describing the embodiments of the present invention, the orientation or positional relationships expressed by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" are based on the orientation or positional relationships shown in the relevant drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present invention.

[0046] The present invention will be described in detail below in conjunction with the drawings and specific embodiments. The embodiments cannot be elaborated one by one here, but the embodiments of the present invention are not limited to the following embodiments.

[0047] Combined with Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, according to an embodiment of the present invention, a position adjustment base for a compact range reflector of the present invention includes: a base 1, a first adjustment member 2 installed in the base 1, and a second adjustment member 3 installed on the first adjustment member 2; in this embodiment, the base 1 includes: a base main body 11, a first driving member 12 and a second driving member 13 provided in the circumferential direction of the base main body 11; wherein, the first driving member 12 is disposed opposite to the side wall of the first adjustment member 2 for driving the first adjustment member 2 to reciprocate along a first direction; the second driving member 13 is disposed opposite to the side wall of the second adjustment member 3 for driving the second adjustment member 3 to reciprocate along a second direction. In this embodiment, the first direction and the second direction are perpendicular to each other. In this embodiment, a fitting groove 31 is provided on the upper side of the second adjustment member 3.

[0048] Through the above settings, the present invention can achieve flexible position adjustment in the horizontal direction through the provided first adjustment member 2, second adjustment member 3, first driving member 12 and second driving member 13, so as to achieve accurate and flexible position adjustment.

[0049] Combined with Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, according to an embodiment of the present utility model, in the first direction, the second adjusting member 3 can freely swing relative to the first adjusting member 2. In this embodiment, during the process of the second adjusting member 3 moving relative to the first adjusting member 2 in the second direction, it can also freely swing relative to the first adjusting member 2 in the first direction, so as to flexibly adjust the opening direction of the fitting groove 31 on the second adjusting member 3 to adapt to the inclination angle of the externally connected seat A to be fitted, thereby enabling flexible adjustment of the inclination angle of the externally connected seat A to be connected.

[0050] In this embodiment, the fitting groove 31 provided on the upper side of the second adjusting member 3 is a groove with a circular arc cross-section. Thus, the second adjusting member 3 can more easily match the externally connected seat A to be inserted, and thus it is easier to achieve flexible angle adjustment. In this embodiment, at the edge of the fitting groove 31, it can be set as a transition circular arc structure, so that the opening of the fitting groove 31 is effectively increased to facilitate the insertion of the externally connected seat A. In addition, to facilitate the stable connection between the externally connected seat A and the fitting groove 31, the lower end of the externally connected seat A can also be set as a circular arc surface.

[0051] Combined Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the present utility model, the first adjusting member 2 includes: a first adjusting seat body 21 and a support roller 22 provided on the first adjusting seat body 21. In this embodiment, along the second direction, arc-shaped support plates 211 are respectively provided at opposite ends of the first adjusting seat body 21; along the circumferential extension direction of the arc-shaped support plates 211, a plurality of support rollers 22 are sequentially rotatably provided; wherein, the support roller 22 is rotatably connected to the arc-shaped support plate 211. Thus, the friction between the support roller 22 and the second adjusting member 3 can be effectively reduced by the rotating support roller 22, so that the present utility model can better adapt to the position adjustment of a larger mass load.

[0052] In this embodiment, a bearing is provided at the position where the support roller 22 is connected to the arc-shaped support plate 211. Among them, the bearing can be a rolling bearing or a sliding bearing. In this embodiment, the provided bearing can preferably be a sliding bearing to reduce rotational friction while achieving a compact structure at the connection position, which is beneficial to ensuring the miniaturization of the structure of the present utility model. In addition, the load-bearing capacity of the support roller 22 can be effectively improved by the provided sliding bearing, so that the present utility model can more easily adapt to the load-bearing of a larger mass load.

[0053] As Figure 5As shown, in this embodiment, a support rib plate 21a1 for supporting the support roller 22 can be further provided on the first adjustment base 21. Among them, a groove is provided at a position corresponding to the support roller 22 on the support rib plate 21a1 for realizing sliding contact with the support roller 22, so as to realize the support of the support roller 22 while ensuring the free rotation of the support roller 22. In addition, a bearing bush can be provided in the groove on the support rib plate 21a1 to effectively reduce the friction force at the rotation position and make its operation more reliable. In this embodiment, a plurality of support rib plates 21a1 are spaced along the second direction on the first adjustment base 21 to realize the support of the support roller 22 at multiple positions. Through the above settings, based on the adopted support rib plate 21a1, the support roller 22 can be stably and reliably supported, and the load-bearing capacity and stability of this solution can be more effectively improved.

[0054] In this embodiment, the outer side surface of the second adjusting member 3 is an arc surface, and the second adjusting member 3 is arranged to be in contact with the support roller 22 based on the outer side surface; among them, the outer side surface of the second adjusting member 3 can be set as an arc surface of a semi-circle, so that the second adjusting member 3 has a sufficient range of movement, and by setting the outer side surface of the second adjusting member 3 as an arc surface, it can effectively enable the second adjusting member 3 of the present utility model to continuously roll along the support roller 22, so that the continuous adjustment process of the inclination angle of the present utility model is more stable and reliable.

[0055] As Figure 4 As shown, according to an embodiment of the present utility model, the first adjustment base 21 includes: two first adjustment parts 21a; among them, the two first adjustment parts 21a are symmetrically arranged; the arc-shaped support plate 211 includes: two arc-shaped plate parts 211a; along the second direction, the arc-shaped plate parts 211a are arranged at opposite ends of the first adjustment part 21a. In this embodiment, the main structure of the first adjustment part 21a is in an L-shaped structure. Thus, the arc-shaped plate part 211a is arranged at the end of the first adjustment part 21a to form a concave cavity between the arc-shaped plate part 211a and the main structure of the first adjustment part 21a, so as to realize the installation of the support roller 22. In this embodiment, the end of the support roller 22 is rotatably connected to the arc-shaped plate part 211a.

[0056] Through the above settings, by adopting the symmetrically arranged first adjustment parts 21a, the stable support of the two opposite sides of the second adjusting member 3 can be symmetrically realized. Thus, it is more convenient and flexible for the second adjusting member 3 to adapt to the change of its angle. In addition, through the provided arc-shaped plate parts 211a, a notch can be formed between the two arc-shaped plate parts 211a to avoid the second adjusting member 3, so that the sliding range of the second adjusting member 3 is wider to avoid interference between the second adjusting member 3 and the first adjusting member 2.

[0057] As Figure 4 shown, according to an embodiment of the present utility model, on the arc-shaped plate portion 211a, a plurality of support rollers 22 are arranged along an arc trajectory; wherein, the center of the arc trajectory coincides with the central axis of the outer side surface of the second adjusting member 3; in this embodiment, adjacent support rollers 22 are spaced apart or may be in contact with each other. By adjusting the positions between adjacent support rollers 22, it is more convenient to adjust the contact position with the second adjusting member 3, so that the support for the second adjusting member 3 is more flexible.

[0058] In this embodiment, the outer surface of the support roller 22 is flush with the edge of the arc-shaped plate portion 211a, or the outer surface of the support roller 22 extends beyond the edge of the arc-shaped plate portion 211a.

[0059] With the above settings, based on the outer surface of the support roller 22 being flush with or extending beyond the edge of the arc-shaped plate portion 211a, it is more convenient to flexibly adjust the position in the second direction, so as to effectively improve the adjustment flexibility of the present utility model.

[0060] With the above settings, the present utility model can accurately control the position of the second adjusting member 3 in the first direction by setting the first adjusting base 21 as two symmetrical first adjusting parts 21a and controlling the synchronous movement of the two first adjusting parts 21a in the horizontal direction. In addition, by controlling the interval between the two opposite first adjusting parts 21a, the position of the second adjusting member 3 in the vertical direction can be flexibly and accurately adjusted. Thus, the present utility model can accurately and flexibly adjust the position of the second adjusting member 3 based on a simple structure.

[0061] As Figure 6 shown, in another embodiment, the center of the arc trajectory is misaligned with the central axis of the outer side surface of the second adjusting member 3. Specifically, the center of the arc trajectory is below (such as directly below) the central axis of the outer side surface of the second adjusting member 3. Further, to further effectively ensure the continuity of the vertical position adjustment of the second adjusting member 3, it is preferable to set adjacent support rollers 22 to be in contact with each other, so that the present utility model continuously adapts to the position change of the second adjusting member 3. In this embodiment, to avoid interference of the arc-shaped plate portion 211a, the outer side surface of the support roller 22 extends beyond the edge of the arc-shaped plate portion 211a. With the above settings, a wider range can be provided in the vertical direction to adjust the position of the second adjusting member 3, making the applicability of the present utility model higher.

[0062] As Figure 4As shown, according to an embodiment of the present utility model, on the arc-shaped plate portion 211a, the diameters of the plurality of support rollers 22 are the same. In this embodiment, the support rollers 22 are all cylindrical rollers. By setting them to have the same diameter, the convenience of their processing can be achieved. In addition, the position of the support rollers 22 can be adjusted to accurately support the second adjustment member 3. As Figure 7 shown, in another embodiment, along the direction from top to bottom, the diameters of the plurality of support rollers 22 are gradually decreasing. Among them, the support rollers 22 are all cylindrical rollers. By setting them to have different diameters, the flexibility of the arrangement position of the support rollers 22 can be achieved, so as to support the second adjustment member 3 at different positions, thereby facilitating a wider adjustment range of the second adjustment member 3 during the process of adjusting the position of the first adjustment portion 21a.

[0063] According to another embodiment of the present utility model, the first adjustment base body 21 can be set as an integral structure, and the arc-shaped support plates 211 at its opposite ends are semi-circular ring plates. Thus, openings can be formed at the opposite ends of the first adjustment base body 21 to avoid affecting the movement range of the second adjustment member 3. By setting the first adjustment base body 21 as an integral structure, the accurate adjustment of the position of the second adjustment member 3 in the horizontal direction can be conveniently achieved.

[0064] Combined with Figure 1 、 Figure 2 and Figure 3 shown, according to an embodiment of the present utility model, the base body 11 includes: a bottom plate 111 and a vertical support 112 fixedly supported on the bottom plate 111. In this embodiment, along the circumferential direction of the bottom plate 111, the vertical support 112 is a plate body arranged in sequence; among them, the first driving member 12 and the second driving member 13 are respectively threadedly connected to the vertical support 112. In this embodiment, the first driving member 12 and the second driving member 13 can be respectively set as bolts. In this embodiment, to facilitate the reliable support of the vertical support 112 for the first driving member 12 and the second driving member 13, a reinforcing rib plate can be provided between the vertical support 112 and the bottom plate 111, thereby effectively ensuring the accurate and reliable adjustment of the positions of the first adjustment member 2 and the second adjustment member 3 by the first driving member 12 and the second driving member 13 respectively.

[0065] In this embodiment, locking nuts 14 are respectively provided on the first driving member 12 and the second driving member 13. Among them, the nut 14 is used to achieve abutment with the vertical support 112. After the positions of the first adjustment member 2 and the second adjustment member 3 are adjusted by the first driving member 12 and the second driving member 13, the abutment with the vertical support 112 is achieved through the provided nut 14, thereby fixing the positions of the first driving member 12 and the second driving member 13, so as to ensure the accurate and reliable adjusted position.

[0066] Combined with Figure 1 、 Figure 2 and Figure 3 As shown, according to an embodiment of the present utility model, along the circumference of the bottom plate 111, a plurality of vertical supports 112 are fixedly connected in sequence to form an annular structure.

[0067] By the above setting, setting the plurality of vertical supports 112 as an annular structure can further effectively increase the structural strength of the plurality of vertical supports 112, so that the first driving member 12 and the second driving member 13 have reliable support, so as to realize the stable adjustment of the first adjusting member 2 and the second adjusting member 3. In addition, by fixedly connecting the plurality of vertical supports 112 in sequence to form an annular structure, it is more convenient to enclose each structure inside, so as to ensure the isolation inside and outside. Thus, the intrusion of external impurities, particulate matters, etc. can be effectively avoided, which is more beneficial to ensuring the dimensional accuracy of the support position.

[0068] Combined with Figure 1 、 Figure 2 and Figure 3 As shown, according to an embodiment of the present utility model, the roughness of the outer surface of the second adjusting member 3 in contact with the support roller 22 satisfies: Ra < 0.8 μm; the roughness of the outer surface of the support roller 22 in contact with the second adjusting member 3 satisfies: Ra < 0.8 μm.

[0069] By the above setting, it is effectively ensured that the contact position is a mirror surface, so that the friction of relative movement can be fully reduced, thus facilitating the present utility model to carry and adjust large loads. In addition, setting the contact position as a mirror surface can effectively ensure the accuracy of the installation position, which is more beneficial to ensuring the support and adjustment accuracy of the present utility model.

[0070] According to an embodiment of the present utility model, along the axial direction of the support roller 22, a plurality of annular grooves are arranged at intervals on the outer side surface of the support roller 22. In this embodiment, the annular grooves can be set as annular grooves with a rectangular or V-shaped cross section. Furthermore, the contact area between the support roller 22 and the second adjusting member 3 can be effectively reduced, so as to more effectively reduce the friction at the contact position, making the adjustment of the present utility model more convenient and flexible.

[0071] The above content is only an example of the specific scheme of the present utility model. For the equipment and structures not described in detail therein, it should be understood that the existing general equipment and general methods in the field are adopted for implementation.

[0072] The above is only one solution of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A position adjustment base for a compact range reflector, characterized in that, Comprising: A base (1), a first adjusting member (2) installed within the base (1), and a second adjusting member (3) installed on the first adjusting member (2); The base (1) includes: a base body (11), a first driving member (12) and a second driving member (13) disposed circumferentially on the base body (11); The first driving member (12) is disposed opposite to the side wall of the first adjusting member (2) for driving the first adjusting member (2) to reciprocate in a first direction; The first driving member (12) is disposed opposite to the side wall of the second adjusting member (3) for driving the second adjusting member (3) to reciprocate in a second direction; The first direction and the second direction are perpendicular to each other; A fitting groove (31) is provided on the upper side of the second adjusting member (3).

2. The position-adjusting base according to claim 1, wherein In the first direction, the second adjusting member (3) can swing freely relative to the first adjusting member (2).

3. The position adjustment base according to claim 2, wherein, The first adjusting member (2) includes: a first adjusting seat body (21) and support rollers (22) provided on the first adjusting seat body (21); Along the second direction, arc-shaped support plates (211) are respectively provided at opposite ends of the first adjusting seat body (21); Along the extending direction of the arc-shaped support plates (211), a plurality of support rollers (22) are successively rotatably provided; The outer side surface of the second adjusting member (3) is an arc surface, and the second adjusting member (3) is arranged in contact with the support rollers (22) based on the outer side surface.

4. The position-adjusting base according to claim 3, characterized in that, The first adjusting seat body (21) includes: two first adjusting parts (21a); The two first adjusting parts (21a) are symmetrically arranged; The arc-shaped support plates (211) include: two arc-shaped plate parts (211a); Along the second direction, the arc-shaped plate parts (211a) are provided at opposite ends of the first adjusting part (21a).

5. The position-adjusting base according to claim 4, characterized in that, On the arc-shaped plate parts (211a), a plurality of support rollers (22) are arranged along an arc track; The center of the arc track coincides with the central axis of the outer side surface of the second adjusting member (3); or, the center of the arc track is offset from the central axis of the outer side surface of the second adjusting member (3).

6. The position adjustment base according to claim 5, characterized in that, On the arc-shaped plate parts (211a), the diameters of the plurality of support rollers (22) are the same, or, along the direction from top to bottom, the diameters of the plurality of support rollers (22) gradually decrease.

7. The position adjustment base according to claim 6, wherein The base body (11) includes: a bottom plate (111) and a vertical support (112) fixedly supported on the bottom plate (111); Along the circumference of the bottom plate (111), the vertical supports (112) are successively arranged plate bodies; The first driving member (12) and the second driving member (13) are respectively threadedly connected to the vertical support (112).

8. The position adjustment base according to claim 7, characterized in that, Along the circumference of the bottom plate (111), the plurality of vertical supports (112) are successively fixedly connected to form an annular structure.

9. The position adjustment base according to claim 8, characterized in that, The roughness of the outer surface of the second adjusting member (3) in contact with the support roller (22) satisfies: Ra < 0.8 μm; The roughness of the outer surface of the support roller (22) in contact with the second adjusting member (3) satisfies: Ra < 0.8 μm.

10. The position adjustment base according to claim 9, characterized in that, Along the axial direction of the support roller (22), a plurality of annular grooves are arranged at intervals on the outer side surface of the support roller (22).

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