A swing mirror adjusting device and a precision shafting swing angle precision measuring and adjusting device

Abstract

The utility model relates to the field of precision instrument measurement and adjustment technology, concretely relates to a kind of swing mirror adjusting device and the measurement adjustment device of precision shafting swing angle precision, including the co-axial setting top plate and bottom plate, and the multiple adjusting screw that are uniformly set around top plate center axis;Spring is arranged between top plate and bottom plate, and spring is uniformly provided with multiple around top plate center axis, for exerting the pulling force of making both mutually close or the thrust of mutually away of top plate and bottom plate;It further includes limiting piece, and the lower end of limiting piece is installed on bottom plate, and upper limit position part for constraining the upper limit of top plate movement is arranged on it, lower limit position part for constraining the lower limit of top plate movement. By setting limiting piece to constrain the upper limit and lower limit of top plate movement, it can effectively prevent device from being misoperated and over-adjusted, avoid the loss of pre-tightening force of spring, also prevent spring from being excessively compressed or excessively stretched, guarantee the integrity of device pre-tightening force system, also guarantee device work within safe stroke.

Description

Technical Field

[0001] This utility model relates to the technical field of a device for measuring and adjusting the accuracy of a precision shaft system swing angle, specifically to a swing angle mirror adjustment device and a device for measuring and adjusting the accuracy of a precision shaft system swing angle. Background Technology

[0002] In high-precision equipment such as precision photoelectric tracking systems and space laser communication systems, the angular accuracy of the precision axis system directly affects the system performance. As a key component for beam control, the installation and adjustment accuracy of the angular mirror is of paramount importance.

[0003] In existing technologies, the accuracy of the shaft system's tilt angle is measured using a photoelectric autocollimator. Specifically, the autocollimator is aimed at the mirror surface, and the tilt angle accuracy is calculated based on the angle between the incident and reflected rays. Ideally, the mirror is fixedly mounted on the shaft system end face, with the mirror end face perpendicular to the shaft axis. However, in practice, when the mirror is mounted on the shaft end, adhesive or screw connections can cause the mirror to tilt, making it impossible to adjust the tilt. Therefore, the mirror end face is not perpendicular to the shaft axis, and the measurement of the shaft system's tilt angle accuracy requires an arcsecond level, thus affecting the measurement accuracy.

[0004] CN115727786A discloses a reflective device for detecting the rotational accuracy of a shaft system in conjunction with a photoelectric autocollimator. The device includes a top plate and a bottom plate. A reflector is mounted on the top plate, and the bottom plate is mounted on the precision shaft system being measured. A screw is provided, threadedly connected to the bottom plate, with a clearance fit between the screw and the top plate. A compression spring fitted on the screw fixes the top plate between the top of the spring and the top of the screw. Rotating the screw adjusts the tilt angle of the top plate, making the reflector perpendicular to the shaft system. However, the compression spring may lose its elasticity during use, affecting the stability of the device's function. Utility Model Content

[0005] 1. The problem to be solved To address the issue of potential elastic failure of the compression spring in existing reflective devices, this invention provides a device for measuring and adjusting the accuracy of the swing angle of a precision shaft system, which can prevent spring failure and ensure the stable function of the device.

[0006] 2. Technical Solution To solve the above problems, the technical solution adopted by this utility model is as follows: This utility model provides a tilting mirror adjustment device, including a top plate and a bottom plate coaxially arranged, and a plurality of adjusting screws evenly arranged around the central axis of the top plate; wherein, the top plate is provided with a mounting position for mounting the tilting mirror, the bottom plate can be mounted on the precision shaft system to be measured, and the adjusting screws are used to adjust the tilt of the top plate; A spring is installed between the top plate and the bottom plate. Multiple springs are evenly arranged around the central axis of the top plate to apply a pulling force to the top plate and the bottom plate to bring them closer together or a pushing force to move them away from each other. It also includes a limiting component, the lower end of which is mounted on the base plate, and is provided with an upper limit part for constraining the upper limit of the top plate movement and a lower limit part for constraining the lower limit of the top plate movement. When the top plate is located between the upper limit part and the lower limit part, the limiting member does not constrain the top plate, so as to ensure that the tension or thrust between the top plate and the bottom plate is effective; When the top plate moves to the upper or lower limit position, the tension or thrust between the top plate and the bottom plate does not fail.

[0007] As a preferred embodiment of this utility model, the top plate is provided with an upper stop for abutting against the lower end of the upper limit part, and a lower stop for abutting against the upper end of the lower limit part.

[0008] As a preferred embodiment of this utility model, the top plate is provided with a through hole for the limiting member to pass through, and both the upper limiting part and the lower limiting part are located in the through hole; A boss extending toward the central axis is provided inside the through hole. The upper stop is the upper end face of the boss, and the lower stop is the lower end face of the boss.

[0009] As a preferred embodiment of this utility model, the spring is configured as a tension spring, with its two ends connected to the top plate and the bottom plate respectively, for applying a pulling force to the top plate and the bottom plate to bring them closer together.

[0010] As a preferred embodiment of this utility model, the hooks at both ends of the tension spring are respectively inserted with tension spring support columns, and the two tension spring support columns are respectively installed in the snap-fit ​​positions on the top plate and the bottom plate to fix the two ends of the tension spring to the top plate and the bottom plate respectively.

[0011] In a preferred embodiment of this utility model, the lower end of the adjusting screw is rotatably connected to the base plate, and the shaft of the adjusting screw is threadedly connected to the top plate. When the adjusting screw rotates, it can adjust the height of the top plate on the corresponding side.

[0012] As a preferred embodiment of this utility model, the lower end of the adjusting screw is rotatably connected to the base plate, the body of the adjusting screw is threadedly connected to the threaded sleeve, and the threaded sleeve is fixedly mounted on the top plate.

[0013] As a preferred embodiment of this utility model, the threaded sleeve includes an upper threaded sleeve and a lower threaded sleeve, with the upper threaded sleeve fixedly disposed at the upper end of the top plate and the lower threaded sleeve fixedly disposed at the lower end of the top plate.

[0014] As a preferred embodiment of this utility model, the top of the adjusting screw is provided with a rotating operating part to facilitate rotating the adjusting screw.

[0015] The second aspect of this utility model provides a device for measuring and adjusting the accuracy of the swing angle of a precision shaft system, including a swing angle mirror, a precision shaft system, an autocollimator, and the aforementioned swing angle mirror adjustment device; the swing angle mirror is installed on the mounting position of the top plate, the bottom plate is fixedly connected to the precision shaft system, and the autocollimator is set directly above the precision shaft system.

[0016] 3. Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model constrains the upper and lower limits of the top plate's movement by setting limiting components, which can effectively prevent the device from being misoperated or over-adjusted, avoid loss of spring preload, prevent the spring from being over-compressed or over-stretched, ensure the integrity of the device's preload system, and ensure that the device operates within its safe travel range. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the tilting mirror adjustment device in this utility model. The spring in the diagram is a tension spring. Figure 2 This is a schematic diagram of the structure of the precision shaft system swing angle measurement and adjustment device in this utility model; Figure 3 This is a schematic diagram of one embodiment of the limiting component in this utility model; Figure 4 This is a schematic diagram of another embodiment of the limiting member in this utility model.

[0018] Explanation of the labels in the diagram: 1. Top plate; 101. Upper stop; 102. Lower stop; 103. Boss; 2. Base plate; 3. Adjust the screw; 301. Rotate the operating part; 4. Spring; 5. Limiting components; 501. Upper limit part; 502. Lower limit part; 6. Tension spring support column; 7. Threaded sleeve; 8. Angle mirror; 9. Precision shaft system; 10. Autocollimator; 11. Card slot. Detailed Implementation

[0019] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0020] The structures, proportions, and sizes illustrated in the accompanying drawings are solely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0021] Example 1 This utility model provides a tilting mirror adjustment device, such as... Figure 1 As shown, it includes: The top plate 1 and the bottom plate 2 are coaxially arranged, and preferably both are circular plates. The top plate 1 has a mounting position for mounting the swing mirror 8, which is preferably a circular groove. The bottom plate 2 can be mounted on the precision shaft system 9 to be measured. Preferably, the bottom plate 2 has fixing holes on its circumference, which can be bolted to the precision shaft system 9 to be measured.

[0022] Multiple adjusting screws 3 are evenly distributed around the central axis of the top plate 1. These adjusting screws are precision M4*0.25 fine-pitch screws. Rotating any one of the adjusting screws 3 changes the height of the top plate 1 relative to the bottom plate 2 at that point, thereby adjusting the tilt of the top plate 1 so that the mirror surface of the tilting mirror 8 on the top plate 1 is perpendicular to the axis of the precision shaft system 9. Preferably, three adjusting screws 3 are provided, one of which is a fixed fulcrum or only one screw is used for coarse adjustment, while the other two points use two screws as leveling feet. Adjusting these two screws can very definitively change the tilt, pitch, and roll of the plane around the fixed fulcrum.

[0023] Spring 4 is positioned between the top plate 1 and the bottom plate 2. Multiple springs 4 are evenly distributed around the central axis of the top plate 1. Spring 4 can be configured as a tension spring or a compression spring, used to apply a pulling force to the top plate 1 and the bottom plate 2 to bring them closer together or a pushing force to move them apart. It should be noted that, whether it is a tension spring or a compression spring, their states should always be consistent, that is, the tension spring should always be in a stretched state and the compression spring should always be in a compressed state, so as to continuously and stably provide preload, ensuring that the threaded pair on the adjusting screw 3 is always tightly engaged, eliminating reverse backlash, and allowing small-amplitude fine adjustments (such as rotating the adjusting screw 3 1 / 4 turn) to produce precise and immediate displacement.

[0024] The limiting member 5 has its lower end mounted on the base plate 2. It is provided with an upper limit part 501 for constraining the upper limit of the movement of the top plate 1 and a lower limit part 502 for constraining the lower limit of the movement of the top plate 1. When the top plate 1 is located between the upper limit part 501 and the lower limit part 502, the limiting member 5 does not constrain the top plate 1, so as to ensure that the tension or thrust between the top plate 1 and the base plate 2 is effective. When the top plate 1 moves to the upper limit part 501 or the lower limit part 502, the tension or thrust between the top plate 1 and the base plate 2 does not fail.

[0025] Specifically, the function of the limiting component 5 is explained as follows: First, it prevents misoperation and over-adjustment. For example, during debugging and maintenance, someone unfamiliar with the structure might attempt adjustments, using the wrong tool, such as an electric wrench instead of a manual fine-tuning wrench, which could cause momentary over-rotation of the adjusting screw 3, exceeding its designed stroke. The limit member 5 acts as a physical barrier, effectively preventing mechanical damage caused by such misoperation.

[0026] Second, it avoids "preload loss" (lower limit). If the top plate 1 moves too low, causing the tension spring to completely relax or even disengage, the preload will disappear instantly. The loss of preload will cause the reverse clearance to reappear, resulting in gaps in the threaded pairs of all adjusting screws 3. The entire device will lack idle rigidity, losing its core foundation for precise adjustment. Furthermore, re-tensioning the tension spring and restoring all adjusting screws 3 to a uniform preload state is extremely difficult, potentially requiring partial disassembly, and the system's initial accuracy may be permanently lost. The existence of the lower limit ensures that the tension spring is always above the minimum preload allowed by the design, thus absolutely guaranteeing the integrity of the preload system.

[0027] Third, prevent overstretching of the tension spring (upper limit). Over-raising the top plate 1 will cause the tension spring to be stretched beyond its elastic limit or the maximum allowable stroke, which may cause the tension spring to undergo plastic deformation and become unable to retract after being stretched, resulting in a reduction or failure of the preload. In severe cases, it may break directly. The upper limit ensures that the device operates within the safe stroke.

[0028] The above is an explanation of the function of the limiting member 5, taking the spring 4 as a tension spring as an example. When the spring 4 is a compression spring, the function is the same, only the upper and lower limits are opposite. The upper limit is used to prevent the compression spring from losing its preload, and the lower limit is used to prevent the compression spring from being over-compressed.

[0029] In summary, this embodiment effectively prevents the device from being misoperated or over-adjusted by setting the limiting member 5 to constrain the upper and lower limits of the top plate 1, avoids the loss of the preload of the spring 4, and also prevents the spring 4 from being over-compressed or over-stretched, ensuring the integrity of the device's preload system and ensuring that the device operates within its safe travel range.

[0030] In one embodiment, the top plate 1 is provided with an upper stop 101 for abutting against the lower end of the upper limit portion 501, and a lower stop 102 for abutting against the upper end of the lower limit portion 502.

[0031] Optionally, such as Figure 3 As shown, the upper limit portion 501 and the lower limit portion 502 of the top plate 1 are both configured as limit blocks that can be detachably connected to the main body of the limit member 5; the upper stop portion 101 and the lower stop portion 102 are respectively configured as the upper end surface and the lower end surface of the top plate 1.

[0032] Optionally, such as Figure 4 As shown, the top plate 1 is provided with a through hole for the limiting member 5 to pass through, and the upper limiting part 501 and the lower limiting part 502 are both located in the through hole; a boss 103 extending towards the central axis is provided in the through hole, the upper stop part 101 is the upper end face of the boss 103, and the lower stop part 102 is the lower end face of the boss 103; this can effectively prevent the end faces used for limiting on the upper limiting part 501 and the upper stop part 101, as well as the lower limiting part 502 and the lower stop part 102 from being contaminated, which would cause errors in the limiting constraint.

[0033] In one embodiment, the spring 4 is configured as a tension spring, with its two ends connected to the top plate 1 and the bottom plate 2 respectively, for applying a pulling force to the top plate 1 and the bottom plate 2 to bring them closer together.

[0034] In one implementation, such as Figure 1 As shown, the hooks at both ends of the tension spring are respectively inserted into the tension spring support column 6. Here, "insertion" means that the hooks hook the tension spring support column 6. The two tension spring support columns 6 are respectively installed in the snap-fit ​​positions 11 on the top plate 1 and the bottom plate 2 to fix the two ends of the tension spring to the top plate 1 and the bottom plate 2 respectively.

[0035] Specifically, the structure of the snap-fit ​​position 11 on the base plate 2 can be as follows: the base plate 2 is provided with a groove so that the hook at the lower end of the tension spring can be inserted into the groove, and an insertion hole is provided on the side of the groove; the tension spring support post 6 is inserted into the insertion hole, and the tension spring support post 6 is also inserted into the hook in the groove to fix the lower end of the tension spring to the base plate 2. The snap-fit ​​position 11 on the top plate 1 can also be configured in the same way to fix the upper end of the tension spring to the top plate 1. As an alternative, the structure of the snap-fit ​​position 11 on the top plate can also be configured as follows: a through hole for the tension spring to pass through is opened on the top plate 1, and a groove for placing the tension spring support post 6 is provided at the upward-facing end of the through hole, and the groove does not extend vertically.

[0036] In both of the above embodiments, whether the hook at the end of the tension spring is directly connected to the top plate 1 and the bottom plate 2, or indirectly connected to the top plate 1 and the bottom plate 2 through the tension spring support column 6, the contact between the tension spring and the top plate 1 and the bottom plate 2 can be regarded as point contact. While ensuring the interaction force between the top plate 1 and the bottom plate 2, the contact area is smaller, and no additional constraints are imposed on the top plate 1 and the bottom plate 2, which is beneficial for adjusting the tilt of the top plate 1.

[0037] In one embodiment, the lower end of the adjusting screw 3 is rotatably connected to the base plate 2, and the shaft of the adjusting screw 3 is threadedly connected to the top plate 1. When the adjusting screw 3 rotates, it can adjust the height of the top plate 1 on the corresponding side, thereby adjusting the swing angle accuracy of the swing angle mirror 8 on the top plate 1.

[0038] In an alternative embodiment, the lower end of the adjusting screw 3 is rotatably connected to the base plate 2, and the shaft of the adjusting screw 3 is threadedly connected to the threaded sleeve 7. The threaded sleeve 7 is fixedly mounted on the top plate 1, and the threaded connection between the adjusting screw 3 and the top plate 1 is achieved through the threaded sleeve 7.

[0039] Preferably, the threaded sleeve 7 includes an upper threaded sleeve and a lower threaded sleeve, with the upper threaded sleeve fixedly disposed at the upper end of the top plate 1 and the lower threaded sleeve fixedly disposed at the lower end of the top plate 1.

[0040] In one embodiment, a rotation operation part 301 is provided on the top of the adjusting screw 3 to facilitate rotation of the adjusting screw 3. Specifically, the outer periphery of the rotation operation part 301 may be provided with raised or recessed textures to increase the friction between the finger and the rotation operation part 301.

[0041] Example 2 The second aspect of this utility model provides a device for measuring and adjusting the swing angle accuracy of a precision shaft system, including a swing angle mirror 8, a precision shaft system 9, an autocollimator 10, and the aforementioned swing angle mirror adjustment device. The swing angle mirror 8 is installed on the mounting position of the top plate 1, the bottom plate 2 is fixedly connected to the precision shaft system 9, and the autocollimator 10 is positioned directly above the precision shaft system 9. By rotating the precision shaft system 9 and the swing angle mirror adjustment device to minimize the coordinate fluctuation value of the autocollimator 10, and by rotating the precision shaft system 9 360° to uniformly collect coordinates, the swing angle accuracy can be obtained.

[0042] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A tilting mirror adjustment device, comprising a top plate (1) and a bottom plate (2) coaxially arranged, and a plurality of adjusting screws (3) evenly arranged around the central axis of the top plate (1); wherein, The top plate (1) is provided with a mounting position for mounting the tilting mirror (8), the bottom plate (2) can be mounted on the precision shaft system (9) to be measured, and the adjusting screw (3) is used to adjust the tilt of the top plate (1); Its features are: A spring (4) is provided between the top plate (1) and the bottom plate (2). Multiple springs (4) are evenly arranged around the central axis of the top plate (1) to apply a pulling force to the top plate (1) and the bottom plate (2) to make them move closer to each other or a pushing force to move them away from each other. It also includes a limiting member (5), the lower end of which is mounted on the base plate (2), and there is an upper limit part (501) for constraining the upper limit of the movement of the top plate (1) and a lower limit part (502) for constraining the lower limit of the movement of the top plate (1).

2. The tilting mirror adjustment device according to claim 1, characterized in that: The top plate (1) is provided with an upper stop (101) for contacting the lower end of the upper limit part (501) and a lower stop (102) for contacting the upper end of the lower limit part (502).

3. The tilting mirror adjustment device according to claim 2, characterized in that: The top plate (1) is provided with a through hole for the limiting member (5) to pass through, and the upper limiting part (501) and the lower limiting part (502) are both located in the through hole; A boss (103) extending toward the central axis is provided in the through hole. The upper stop (101) is set as the upper end face of the boss (103), and the lower stop (102) is set as the lower end face of the boss (103).

4. The tilting mirror adjustment device according to claim 1, characterized in that: The spring (4) is a tension spring, with its two ends connected to the top plate (1) and the bottom plate (2) respectively, and is used to apply a pulling force to the top plate (1) and the bottom plate (2) to bring them closer together.

5. The tilting mirror adjustment device according to claim 4, characterized in that: The hooks at both ends of the tension spring are respectively inserted with tension spring support columns (6). The two tension spring support columns (6) are respectively installed in the snap-fit ​​positions (11) on the top plate (1) and the bottom plate (2) to fix the two ends of the tension spring to the top plate (1) and the bottom plate (2) respectively.

6. The tilting mirror adjustment device according to claim 4, characterized in that: The lower end of the adjusting screw (3) is rotatably connected to the base plate (2), and the body of the adjusting screw (3) is threadedly connected to the top plate (1). When the adjusting screw (3) rotates, it can adjust the height of the top plate (1) on the corresponding side.

7. The tilting mirror adjustment device according to claim 4, characterized in that: The lower end of the adjusting screw (3) is rotatably connected to the base plate (2), and the body of the adjusting screw (3) is threadedly connected to the threaded sleeve (7). The threaded sleeve (7) is fixedly set on the top plate (1).

8. The tilting mirror adjustment device according to claim 7, characterized in that: The threaded sleeve (7) includes an upper threaded sleeve and a lower threaded sleeve. The upper threaded sleeve is fixedly installed at the upper end of the top plate (1), and the lower threaded sleeve is fixedly installed at the lower end of the top plate (1).

9. The tilting mirror adjustment device according to claim 1, characterized in that: The top of the adjusting screw (3) is provided with a rotating operating part (301) to facilitate rotating the adjusting screw (3).

10. A device for measuring and adjusting the accuracy of a precision shaft system's swing angle, characterized in that: It includes a tilting mirror (8), a precision shaft system (9), an autocollimator (10), and a tilting mirror adjustment device as described in any one of claims 1-9; the tilting mirror (8) is installed on the mounting position of the top plate (1), the bottom plate (2) is fixedly connected to the precision shaft system (9), and the autocollimator (10) is located directly above the precision shaft system (9).

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