A displacement table limiting device
By designing a displacement stage limiting device that includes pitch angle limiting, yaw angle limiting, and displacement limiting components, the problem of the focusing coil colliding with the equipment due to exceeding the limits during adjustment is solved, achieving the independence and reliability of the limiting and ensuring equipment safety.
Patent Information
- Application Number
- CN202610607852.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-06
- Publication Date
- 2026-06-23
AI Technical Summary
In the existing technology, the focusing coil may collide with surrounding equipment during the adjustment process due to excessive pitch angle, deflection angle or displacement, which poses a safety hazard. Furthermore, the angle limit and displacement limit interfere with each other, affecting the accuracy and reliability of the limit.
Design a displacement stage limiting device, including a pitch angle limiting component, a yaw angle limiting component, and a displacement limiting component, which are used to generate independent limit triggers when the pitch angle, yaw angle, and displacement exceed the limits, respectively, to ensure the decoupling of angle limiting and displacement limiting.
It achieves independence between angle limit and displacement limit, improves the accuracy and reliability of the limit, prevents the focusing coil and its support from colliding with surrounding equipment due to excessive movement, and ensures equipment safety.
Smart Images
Figure CN122269556A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of precision adjustment devices for free-electron laser accelerators, and in particular to a displacement stage limiting device. Background Technology
[0002] As a modern large-scale scientific instrument, the precise control of the electron beam is crucial during the operation of a free-electron laser facility. The focusing coil is a key component, providing a magnetic field to adjust the electron beam shape and improve its quality. In actual beam tuning, a six-degree-of-freedom motion platform (six-dimensional stage) is typically used as the adjustment mechanism to precisely adjust the spatial attitude of the focusing coil, including displacement (e.g., x and z directions) and angles (e.g., pitch angle θx and deflection angle θz). The focusing coil is mounted on the adjustment mechanism via a focusing coil support.
[0003] In situations where three-dimensional space is limited, existing adjustment methods have the following problems: When the motion platform undergoes excessive displacement or angular deflection, the focusing coil support may collide with surrounding equipment due to excessive pitch angle, and the focusing coil may collide with surrounding equipment due to excessive deflection angle or excessive horizontal or vertical displacement, causing damage and posing safety hazards. Furthermore, because the angle limit and displacement limit are often not effectively separated, they are prone to mutual interference during adjustment, affecting the accuracy and reliability of the limits. Summary of the Invention
[0004] The purpose of this invention is to provide a displacement stage limiting device to solve the technical problem in the prior art where the focusing coil collides with surrounding equipment due to excessive pitch angle, excessive deflection angle, or excessive displacement during the adjustment process, and the angle limiting and displacement limiting interfere with each other.
[0005] In a first aspect, the present invention provides a displacement stage limiting device for limiting and protecting a focusing coil, wherein the focusing coil is mounted on an adjustment mechanism via a focusing coil support seat, and the displacement stage limiting device includes: a pitch angle limiting component, a deflection angle limiting component, and a displacement limiting component; The pitch angle limiting component is used to trigger a limit when the pitch angle of the focusing coil support exceeds the limit. The deflection angle limiting component is used to generate a limiting trigger when the deflection angle of the focusing coil exceeds the limit; The displacement limiting component is used to trigger a limit when the focusing coil exceeds the horizontal or vertical displacement limit.
[0006] In an optional embodiment, the pitch angle limiting assembly includes at least one pitch angle limiting switch and at least one pitch angle limiting switch support, wherein the pitch angle limiting switch is disposed on the pitch angle limiting switch support. The pitch angle limit switch is located at the focusing coil support and is used to trigger a limit when the pitch angle of the focusing coil support exceeds the limit.
[0007] In an optional embodiment, two pitch angle limit switches are provided, and two pitch angle limit switch support seats are provided accordingly. The two pitch angle limit switches are respectively installed on the corresponding pitch angle limit switch support seats. The two pitch angle limit switch supports are symmetrically arranged on both sides of the focusing coil support along the axial direction of the focusing coil, so that when the pitch angle of the focusing coil support exceeds the limit, the pitch angle limit switch on the corresponding side is triggered. A sleeve is provided between the two pitch angle limit switch supports to maintain the distance between the two pitch angle limit switch supports.
[0008] In an optional embodiment, the deflection angle limiting component includes at least one deflection angle limiting switch and at least one deflection angle limiting switch support, wherein the deflection angle limiting switch is disposed on the deflection angle limiting switch support. The deflection angle limit switch is located at the magnetic center of the focusing coil and is used to trigger a limit when the deflection angle of the focusing coil exceeds the limit.
[0009] In an optional embodiment, two deflection angle limit switches are provided, and two corresponding deflection angle limit switch support seats are provided, with the two deflection angle limit switches respectively installed on the corresponding deflection angle limit switch support seats; The two deflection angle limit switch supports are symmetrically arranged on both sides of the focusing coil support along the radial direction of the focusing coil, and the two deflection angle limit switch supports are located on the same side of the focusing coil along the axial direction of the focusing coil, so that when the focusing coil deflects beyond the limit, the corresponding deflection angle limit switch is touched.
[0010] In an optional embodiment, a fixing rod is also included, and both the pitch angle limiting component and the yaw angle limiting component are fixedly installed on the fixing rod; Along the axial direction of the focusing coil, the focusing coil support is provided with a through hole, the fixing rod is used to pass through the through hole, and the focusing coil support can perform pitching, yaw, and horizontal and vertical displacement relative to the fixing rod.
[0011] In an optional embodiment, the displacement limiting component includes an inner copper ring and an outer copper ring sleeved on the inner copper ring. The inner copper ring is fixedly sleeved on the fixing rod, and the outer copper ring is disposed in the through hole for connecting with the focusing coil support and moving synchronously with it. There is a pre-set annular gap between the inner copper ring and the outer copper ring. When the horizontal or vertical displacement of the focusing coil exceeds the limit, the outer copper ring moves with the focusing coil support to contact the inner copper ring, thereby generating a limit trigger.
[0012] In an optional embodiment, the displacement limiting assembly further includes a pair of pressure rings and at least one tension spring; A pair of pressure rings are spaced apart and sleeved on the fixed rod, and are symmetrically arranged on both sides of the focusing coil support along the axial direction of the focusing coil, with the outer copper ring located between the pair of pressure rings; The tension spring passes through the focusing coil support base, and both ends of the tension spring are respectively connected to a pair of pressure rings, so that the outer copper ring is clamped between the pair of pressure rings and moves synchronously with the focusing coil support base.
[0013] In an optional embodiment, a fixing block is also included, through which the fixing rod is fixedly connected to the external bracket.
[0014] In an optional embodiment, a buffer is provided between the pitch angle limit switch support and the focusing coil support.
[0015] Compared with the prior art, the technical advantages of the displacement stage limiting device provided by the present invention are as follows: The displacement stage limiting device provided by this invention is used for limiting the protection of the focusing coil. The focusing coil is mounted on the adjustment mechanism via a focusing coil support. The displacement stage limiting device includes: a pitch angle limiting component, a yaw angle limiting component, and a displacement limiting component. The pitch angle limiting component is used to trigger a limit when the pitch angle of the focusing coil support exceeds the limit. The yaw angle limiting component is used to trigger a limit when the yaw angle of the focusing coil exceeds the limit. The displacement limiting component is used to trigger a limit when the horizontal or vertical displacement of the focusing coil exceeds the limit.
[0016] By setting up pitch angle limit components, yaw angle limit components, and displacement limit components, each independently undertakes the functions of triggering pitch angle over-limit, yaw angle over-limit, and horizontal and vertical displacement over-limit. This makes the angle limit and displacement limit functions independent of each other and does not interfere with each other, thus achieving decoupling between the angle limit and displacement limit. This improves the accuracy and reliability of the limit and can effectively prevent the focusing coil and its support from colliding with surrounding equipment due to excessive movement, ensuring equipment safety.
[0017] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description
[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 A schematic diagram illustrating the cooperation between the displacement stage limiting device, the six-dimensional stage, and the focusing coil provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the cooperation between the displacement stage limiting device and the focusing coil provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the pitch angle limiting component and displacement limiting component provided in an embodiment of the present invention; Figure 4 Exploded view of the pitch angle limiting component and displacement limiting component provided in the embodiments of the present invention; Figure 5 This is a schematic diagram of the deflection angle limiting component structure provided in an embodiment of the present invention; Figure 6 This is a cross-sectional view of the pitch angle limiting component and displacement limiting component provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the inner and outer copper rings fitting together, provided in an embodiment of the present invention.
[0020] Icons: 1-Focusing coil; 2-Focusing coil support; 3-Deflection angle limit assembly; 4-Pitch angle limit switch; 5-Pitch angle limit switch support; 6-Sleeve; 7-Deflection angle limit switch; 8-Deflection angle limit switch support; 9-Fixing rod; 10-Inner copper ring; 11-Outer copper ring; 12-Pressure ring; 13-Tension spring; 14-Fixing block; 15-Rubber column; 16-Six-dimensional platform; 17-Bolt; 18-Three-pull, three-top structure; 19-Compression nut. Detailed Implementation
[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0024] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.
[0025] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.
[0026] The specific structure is as follows: Figures 1 to 7 As shown.
[0027] This embodiment provides a displacement stage limiting device for limiting the position of a focusing coil 1. The focusing coil 1 is mounted on an adjustment mechanism via a focusing coil support 2. The displacement stage limiting device includes: a pitch angle limiting component, a yaw angle limiting component 3, and a displacement limiting component. The pitch angle limiting component is used to trigger a limit when the pitch angle of the focusing coil support 2 exceeds the limit. The yaw angle limiting component 3 is used to trigger a limit when the yaw angle of the focusing coil 1 exceeds the limit. The displacement limiting component is used to trigger a limit when the horizontal or vertical displacement of the focusing coil 1 exceeds the limit.
[0028] In this embodiment, by setting up a pitch angle limiting component, a yaw angle limiting component 3, and a displacement limiting component, each independently undertakes the functions of triggering pitch angle over-limit, yaw angle over-limit, and horizontal and vertical displacement over-limit, making the angle limiting and displacement limiting functions independent of each other and not interfering with each other. This achieves decoupling of the angle limiting and displacement limiting, improves the accuracy and reliability of the limiting, and can effectively prevent the focusing coil 1 and its support from colliding with surrounding equipment due to excessive movement, thus ensuring equipment safety.
[0029] In this embodiment, the pitch angle limiting component includes at least one pitch angle limiting switch 4 and at least one pitch angle limiting switch support 5. The pitch angle limiting switch 4 is disposed on the pitch angle limiting switch support 5. The pitch angle limiting switch 4 is located at the focusing coil support 2 and is used to generate a limit trigger when the pitch angle of the focusing coil support 2 exceeds the limit.
[0030] Furthermore, two pitch angle limit switches 4 are provided, and two pitch angle limit switch support seats 5 are provided accordingly. The two pitch angle limit switches 4 are respectively installed on the corresponding pitch angle limit switch support seats 5. The two pitch angle limit switch support seats 5 are symmetrically arranged on both sides of the focusing coil support seat 2 along the axial direction of the focusing coil 1, so that when the pitch angle of the focusing coil support seat 2 exceeds the limit, the pitch angle limit switch 4 on the corresponding side is touched. A sleeve 6 is provided between the two pitch angle limit switch support seats 5, and the sleeve 6 is used to maintain the distance between the two pitch angle limit switch support seats 5.
[0031] By setting two pitch angle limit switches 4 and symmetrically arranging them, limit monitoring can be performed on both pitch direction extreme positions of the focusing coil support 2, avoiding the collision risk caused by unilateral limit omission and improving the comprehensiveness and reliability of pitch angle limit. The sleeve 6 ensures the stability of the relative distance between the two pitch angle limit switch support seats 5, preventing limit position displacement due to structural deformation and ensuring the accuracy of limit triggering.
[0032] In this embodiment, the deflection angle limiting component 3 includes at least one deflection angle limiting switch 7 and at least one deflection angle limiting switch support 8. The deflection angle limiting switch 7 is disposed on the deflection angle limiting switch support 8. The deflection angle limiting switch 7 is located at the magnetic center of the focusing coil 1 and is used to generate a limit trigger when the deflection angle of the focusing coil 1 exceeds the limit.
[0033] Furthermore, two deflection angle limit switches 7 are provided, and two corresponding deflection angle limit switch support seats 8 are provided. The two deflection angle limit switches 7 are respectively installed on the corresponding deflection angle limit switch support seats 8. The two deflection angle limit switch support seats 8 are symmetrically arranged on both sides of the focusing coil support seat 2 along the radial direction of the focusing coil 1, and the two deflection angle limit switch support seats 8 are located on the same side of the focusing coil 1 along the axial direction of the focusing coil 1, so that when the deflection angle of the focusing coil 1 exceeds the limit, the deflection angle limit switch 7 on the corresponding side is touched.
[0034] By placing the deflection angle limit switch 7 at the magnetic center of the focusing coil 1, the influence of pitch angle adjustment on the deflection angle limit can be eliminated, further improving the accuracy of the limit. The two deflection angle limit switches 7 are symmetrically arranged, which can monitor the limit positions of both deflection directions of the focusing coil 1, improving the comprehensiveness and reliability of the deflection angle limit.
[0035] In this embodiment, the displacement stage limiting device also includes a fixed rod 9, and the pitch angle limiting component and the deflection angle limiting component 3 are both fixedly installed on the fixed rod 9; along the axial direction of the focusing coil 1, the focusing coil support 2 is provided with a through hole, the fixed rod 9 is used to pass through the through hole, and the focusing coil support 2 can perform pitch movement, deflection movement and horizontal and vertical displacement movement relative to the fixed rod 9.
[0036] By setting the fixed rod 9, a unified mounting base is provided for the pitch angle limiting component and the yaw angle limiting component 3, making the overall structure compact and easy to install and debug. The fixed rod 9 passes through the through hole of the focusing coil support 2. The focusing coil support 2 can pitch and yaw around the fixed rod 9, and can also move relative to the fixed rod 9 in the horizontal and vertical directions, realizing the integration of limiting functions for multi-degree-of-freedom movement.
[0037] In this embodiment, the displacement limiting component includes an inner copper ring 10 and an outer copper ring 11 sleeved on the inner copper ring 10. The inner copper ring 10 is fixedly sleeved on the fixing rod 9, and the outer copper ring 11 is disposed in the through hole for connecting with the focusing coil support 2 and moving synchronously with it. A pre-set annular gap is provided between the inner copper ring 10 and the outer copper ring 11. When the horizontal or vertical displacement of the focusing coil 1 exceeds the limit, the outer copper ring 11 moves with the focusing coil support 2 to contact the inner copper ring 10, thereby generating a limiting trigger. Specifically, the inner copper ring 10 is locked and fixed on the fixing rod 9 by a locking nut, and the inner copper ring 10 is located between the two pitch angle limit switch supports 5 to ensure that the position of the inner copper ring 10 on the fixing rod 9 is fixed.
[0038] The mechanical contact triggering mechanism between the inner copper ring 10 and the outer copper ring 11 enables the outer copper ring 11 to move with the focusing coil support 2 when the horizontal or vertical displacement of the focusing coil 1 exceeds the limit. This eliminates the annular gap, and the outer copper ring 11 contacts and conducts with the inner copper ring 10, generating an emergency stop signal and achieving displacement limit triggering. This structure is highly responsive and reliable, and the limit distance can be flexibly controlled by processing copper rings of different sizes.
[0039] Furthermore, the displacement limiting assembly also includes a pair of pressure rings 12 and at least one tension spring 13; the pair of pressure rings 12 are spaced apart on the fixing rod 9 and are symmetrically arranged on both sides of the focusing coil support 2 along the axial direction of the focusing coil 1, and the outer copper ring 11 is located between the pair of pressure rings 12; the tension spring 13 passes through the focusing coil support 2, and both ends of the tension spring 13 are respectively connected to the pair of pressure rings 12, so that the outer copper ring 11 is clamped between the pair of pressure rings 12 and moves synchronously with the support.
[0040] Specifically, the focusing coil support 2 has four through holes around the through hole, and four tension springs 13 are correspondingly provided. The four tension springs 13 pass through the corresponding through holes, so that a pair of pressure rings 12 can be firmly installed on the focusing coil support 2. Through the cooperation of the pair of pressure rings 12 and tension springs 13, the outer copper ring 11 is reliably clamped and positioned between the pair of pressure rings 12, ensuring that the outer copper ring 11 moves synchronously with the focusing coil support 2. At the same time, the tension springs 13 provide elastic force to keep the pressure rings 12 and the outer copper ring 11 in close contact, ensuring the accuracy of displacement limit triggering.
[0041] In this embodiment, the displacement stage limiting device further includes a fixing block 14, and the fixing rod 9 is fixedly connected to the external bracket through the fixing block 14. The fixing block 14 serves as a transfer and support, enabling the entire limiting device to be stably installed on the external bracket.
[0042] Specifically, bolt holes are provided on the fixing block 14, and the fixing block 14 is fixed to the external bracket by bolts 17. The bottom of the deflection angle limit switch support 8 is also fixed to the external bracket, thereby realizing the fixed connection between the entire displacement table limit device and the external bracket.
[0043] In this embodiment, during installation, the fixing block 14 is fixed to the external bracket by bolts 17, the fixing rod 9 passes through the focusing coil and is locked with the clamping nut 19, and the attitude of the entire limiting device is adjusted by the three-pull and three-push structure 18 to ensure that the relative position between the pitch angle limiting component and the deflection angle limiting component 3 and the focusing coil 1 is accurate.
[0044] In this embodiment, a buffer is provided between the pitch angle limit switch support 5 and the focusing coil support 2. Optionally, the buffer can be a rubber post 15 or a spring.
[0045] In this embodiment, the buffer can be arranged along the axial direction of the focusing coil on the side of the pitch angle limit switch support 5 facing the focusing coil support 2. When the buffer is a rubber column 15, the rubber column 15 is arranged between the pitch angle limit switch support 5 and the focusing coil support 2. When the focusing coil support 2 undergoes pitch movement and approaches the limit position, the rubber column 15 first contacts the focusing coil support 2, thus providing a buffering effect. When the buffer is a spring, the spring is arranged between the pitch angle limit switch support 5 and the focusing coil support 2. When the focusing coil support 2 undergoes pitch movement and approaches the limit position, the spring is first compressed, absorbing the impact energy. The buffer can provide buffer protection for the focusing coil support 2, preventing direct hard collision between the focusing coil support 2 and the pitch angle limit switch support 5, and protecting the limiting device from impact damage.
[0046] In this embodiment, the buffer can also be arranged on both sides of the pitch angle limit switch support 5 along the radial direction of the focusing coil, so as to buffer and protect the focusing coil support 2 when the horizontal displacement of the focusing coil 1 exceeds the limit, so as to avoid the focusing coil support 2 from direct hard collision with the pitch angle limit switch support 5 and protect the limit device from impact damage.
[0047] Specifically, in this embodiment, the axial direction of the focusing coil 1 is defined as the y-axis, the vertical direction as the z-axis, and the horizontal direction as the x-axis. The focusing coil support 2 can rotate relative to the fixed rod 9 around the x-axis to generate a pitch angle θx; the focusing coil support 2 can rotate relative to the fixed rod 9 around the z-axis to generate a deflection angle θz; the focusing coil support 2 can move relative to the fixed rod 9 along the x-axis to generate horizontal displacement; and the focusing coil support 2 can move relative to the fixed rod 9 along the z-axis to generate vertical displacement. Thus, the pitch angle limiting component is used to limit the angle deflection in the θx direction, the deflection angle limiting component 3 is used to limit the angle deflection in the θz direction, and the displacement limiting component is used to limit the displacement in the x-axis and z-axis directions, thereby achieving independent limiting protection for the four degrees of freedom. When the pitch angle of the focusing coil support 2 exceeds the limit, the focusing coil support 2 will touch the pitch angle limit switch 4 on the corresponding side. After the pitch angle limit switch 4 is triggered, it generates a limit signal, thereby achieving limit protection in the pitch angle θx direction. When the deflection angle of the focusing coil 1 exceeds the limit, the focusing coil 1 will touch the deflection angle limit switch 7 on the corresponding side. After the deflection angle limit switch 7 is triggered, it generates a limit signal, thereby achieving limit protection in the deflection angle θz direction. When the horizontal or vertical displacement of the focusing coil support 2 exceeds the limit, the outer copper ring 11 moves with the focusing coil support 2 along the x-axis or z-axis until it contacts the inner copper ring 10. After the outer copper ring 11 contacts the inner copper ring 10 and conducts, it generates a limit signal, thereby achieving limit protection in the x-axis and z-axis directions.
[0048] The working process and control flow of this embodiment are as follows: The input signal of the limit controller is connected to the controller of the six-dimensional stage 16. When the limit is triggered, the controller of the six-dimensional stage 16 triggers an emergency stop to protect the equipment. Specifically, when the six-dimensional stage 16 triggers the limit, the controller is powered off, and the six-dimensional stage stops moving. Then, the emergency stop state of the six-dimensional stage 16 is released by pressing the limit enable button; the motor of the six-dimensional stage 16 is enabled again; at this time, the limit clear status light is flashing, prompting the operator to carefully consider the direction of operation of the displacement stage and operate with caution; when the six-dimensional stage 16 leaves the limit position, the flashing light goes out, and the limit function is completed.
[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A displacement stage limiting device for limiting and protecting a focusing coil (1), wherein the focusing coil (1) is mounted on an adjusting mechanism via a focusing coil support (2), characterized in that, The displacement stage limiting device includes: pitch angle limiting component, yaw angle limiting component (3) and displacement limiting component; The pitch angle limiting component is used to trigger a limit when the pitch angle of the focusing coil support (2) exceeds the limit; The deflection angle limiting component (3) is used to generate a limiting trigger when the deflection angle of the focusing coil (1) exceeds the limit; The displacement limiting component is used to generate a limit trigger when the focusing coil (1) exceeds the horizontal or vertical displacement limit.
2. The displacement stage limiting device according to claim 1, characterized in that, The pitch angle limiting assembly includes at least one pitch angle limiting switch (4) and at least one pitch angle limiting switch support (5), wherein the pitch angle limiting switch (4) is disposed on the pitch angle limiting switch support (5); The pitch angle limit switch (4) is located at the focusing coil support (2) and is used to trigger the limit when the pitch angle of the focusing coil support (2) exceeds the limit.
3. The displacement stage limiting device according to claim 2, characterized in that, Two pitch angle limit switches (4) are provided, and two pitch angle limit switch support seats (5) are provided accordingly. The two pitch angle limit switches (4) are respectively installed on the corresponding pitch angle limit switch support seats (5). Two pitch angle limit switch supports (5) are symmetrically arranged on both sides of the focusing coil support (2) along the axis of the focusing coil (1) so that when the pitch angle of the focusing coil support (2) exceeds the limit, the pitch angle limit switch (4) on the corresponding side is touched. A sleeve (6) is provided between the two pitch angle limit switch support seats (5), and the sleeve (6) is used to maintain the distance between the two pitch angle limit switch support seats (5).
4. The displacement stage limiting device according to claim 1, characterized in that, The deflection angle limiting component (3) includes at least one deflection angle limiting switch (7) and at least one deflection angle limiting switch support (8), wherein the deflection angle limiting switch (7) is disposed on the deflection angle limiting switch support (8); The deflection angle limit switch (7) is located at the magnetic center of the focusing coil (1) and is used to trigger a limit when the deflection angle of the focusing coil (1) exceeds the limit.
5. The displacement stage limiting device according to claim 4, characterized in that, Two deflection angle limit switches (7) are provided, and two deflection angle limit switch support bases (8) are provided accordingly. The two deflection angle limit switches (7) are respectively installed on the corresponding deflection angle limit switch support bases (8). Two deflection angle limit switch supports (8) are arranged symmetrically on both sides of the focusing coil support (2) along the radial direction of the focusing coil (1), and the two deflection angle limit switch supports (8) are located on the same side of the focusing coil (1) along the axial direction of the focusing coil (1), so that when the focusing coil (1) deflects beyond the limit, it touches the deflection angle limit switch (7) on the corresponding side.
6. The displacement stage limiting device according to any one of claims 1-5, characterized in that, It also includes a fixing rod (9), and the pitch angle limiting component and the deflection angle limiting component (3) are both fixedly installed on the fixing rod (9); Along the axial direction of the focusing coil (1), the focusing coil support (2) is provided with a through hole, the fixing rod (9) is used to pass through the through hole, and the focusing coil support (2) can perform pitching, yaw and horizontal and vertical displacement relative to the fixing rod (9).
7. The displacement stage limiting device according to claim 6, characterized in that, The displacement limiting component includes an inner copper ring (10) and an outer copper ring (11) sleeved on the inner copper ring (10). The inner copper ring (10) is fixedly sleeved on the fixing rod (9), and the outer copper ring (11) is disposed in the through hole for connecting with the focusing coil support (2) and moving synchronously with it. There is a pre-set annular gap between the inner copper ring (10) and the outer copper ring (11). When the horizontal or vertical displacement of the focusing coil (1) exceeds the limit, the outer copper ring (11) moves with the focusing coil support (2) to contact the inner copper ring (10), thereby generating a limit trigger.
8. The displacement stage limiting device according to claim 7, characterized in that, The displacement limiting assembly also includes a pair of pressure rings (12) and at least one tension spring (13). A pair of pressure rings (12) are spaced apart and sleeved on the fixed rod (9), and are symmetrically arranged on both sides of the focusing coil support seat (2) along the axial direction of the focusing coil (1). The outer copper ring (11) is located between the pair of pressure rings (12). The tension spring (13) passes through the focusing coil support (2), and both ends of the tension spring (13) are respectively connected to a pair of pressure rings (12) so that the outer copper ring (11) is clamped between the pair of pressure rings (12) and moves synchronously with the focusing coil support (2).
9. The displacement stage limiting device according to claim 6, characterized in that, It also includes a fixing block (14), through which the fixing rod (9) is fixedly connected to the external bracket.
10. The displacement stage limiting device according to claim 2, characterized in that, A buffer is provided between the pitch angle limit switch support (5) and the focusing coil support (2).