Limiting rotating device of medical electron linear accelerator
The design of the motor-driven sprocket chain transmission and limiting mechanism solves the problems of low transmission efficiency and small limiting angle of traditional medical electron linear accelerators, realizes efficient transmission and buffer limiting, adapts to different angle requirements, and reduces equipment wear and noise.
Patent Information
- Application Number
- CN202421561138.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-07-03
AI Technical Summary
The driving mechanism of the traditional medical electron linear accelerator's rotating device has low power transmission and the equipment is prone to wear. The limiting mechanism has a small limiting angle and no buffering during the limiting process, resulting in collision and impact affecting the equipment.
It adopts the driving mode of motor-driven sprocket chain transmission, combined with the follower component and buffer component in the limit mechanism, including guide rails, sliders and buffer units, to achieve efficient transmission and buffer limit. The guide rail length can be adjusted to meet different angle requirements.
It improves transmission efficiency, reduces equipment wear and noise, realizes large angle limit and flexible angle adjustment, and avoids limit collision impact.
Smart Images
Figure CN223366115U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical electron accelerators, in particular to a limiting rotation device for a medical electron linear accelerator. Background Art
[0002] A medical electron linear accelerator is a medical device used for radiotherapy of tumors or other lesions in patients. During the radiotherapy process, the accelerator's rotating frame is used to locate the patient's lesion, thereby aiming the radiation beam at the patient's lesion.
[0003] Traditionally, the drive mechanisms of medical linear electron accelerators' rotating mechanisms are often belt-driven or worm-gear-driven. These drive methods suffer from low power transmission and are prone to wear. Furthermore, to prevent wear and tear caused by excessive rotation of the rotating gantry during rotation, a limiting mechanism is required. However, traditional rotation limiting mechanisms often use fixed stop blocks, resulting in a narrow limiting angle. Furthermore, collisions and impacts during the limiting process can adversely affect the medical linear accelerator. Utility Model Content
[0004] The purpose of this utility model is to solve the technical problems of low power transmission of the driving mechanism of the rotating device of the traditional Chinese electron linear accelerator, easy wear of the equipment, small limiting angle of the traditional limiting mechanism, and no buffering during the limiting process in the prior art. The utility model provides the following technical solutions:
[0005] A limited rotation device for a medical electron linear accelerator comprises: a frame, a rotating mechanism, a driving mechanism and a limiting mechanism, wherein the frame is rotationally connected to the rotating mechanism via a bearing, and the driving mechanism and the limiting mechanism are both fixedly mounted on the frame; the driving mechanism is connected to the rotating mechanism and is used to drive the rotating mechanism to rotate; the limiting mechanism is close to the rotating mechanism, and when the rotating mechanism contacts the limiting mechanism, the limiting mechanism is used to limit the rotation of the rotating mechanism.
[0006] The rotating mechanism includes a rotating frame and a collision block. The rotating frame is rotatably connected to the frame through a bearing. One end of the collision block is fixedly connected to the rotating frame, and the other end extends to the limiting mechanism. When the rotating frame rotates, the collision block contacts the limiting mechanism.
[0007] The driving mechanism includes a driving motor assembly, a driving sprocket and a driven sprocket. The driving motor assembly is fixedly mounted on the frame. The driving sprocket and the driven sprocket are connected via a transmission chain. The driving sprocket is fixedly connected to the output end of the driving motor assembly, and the driven sprocket is fixedly connected to the rotating frame via bolts.
[0008] The limiting mechanism includes a follower assembly and a buffer assembly both fixedly mounted on the frame. The follower assembly is located between the buffer assembly and the rotating frame. During the rotation of the rotating mechanism, the impact block contacts the follower assembly.
[0009] The follower assembly includes a guide rail and a slider adapted to the guide rail, the guide rail is arranged in an arc shape, and the slider is slidably connected to the guide rail; during the rotation of the rotating mechanism, one end of the slider contacts the collision block, and the other end contacts the buffer assembly.
[0010] Preferably, the follower assembly further includes a base plate, the guide rail and the slider are mounted on the base plate, and the base plate is fixedly mounted on the frame.
[0011] The buffer assembly includes two buffer units arranged opposite to each other, the slider is located between the two buffer units, and a travel switch is provided on one side of each buffer unit.
[0012] The buffer unit includes a spring, one end of the spring is fixedly connected to the mounting seat, and the other end is fixedly connected to the buffer block. The mounting seat is fixedly installed on the frame, and the buffer block is in contact with the slider.
[0013] Preferably, the buffer block, the sliding block and the impact block are all provided with buffer pads.
[0014] Preferably, the length of the guide rail is adjustable.
[0015] Preferably, between the driving sprocket and the driven sprocket, tensioning mechanisms are provided on both sides of the transmission chain, and each of the tensioning mechanisms comprises a gear plate, and the gear plate is engaged with the transmission chain.
[0016] The utility model has the following advantages:
[0017] (1) The medical electron linear accelerator rotation device provided by the utility model is driven by a motor and is transmitted through the cooperation of a sprocket and a chain. The driving method provided by this design has the advantages of large load and high transmission efficiency.
[0018] (2) The present invention also discloses the specific structure of the limiting mechanism. The buffer unit in the limiting mechanism can avoid collision impact during the limiting collision, effectively avoiding the adverse effects of the impact on the medical electron linear accelerator. At the same time, an anti-collision pad is installed at the limiting collision position to effectively reduce the noise generated by the collision.
[0019] (3) The length of the guide rail of the present invention is adjustable, and the size adjustment requirement of the limit angle can be achieved by extending the length of the guide rail. The limit requirements of different rotation angles can be met through a simple structure, especially the limit requirements of larger rotation angles.
[0020] (4) The present invention realizes the limiting requirement for the forward and reverse rotation of the rotating mechanism through a limiting mechanism, and the structure of the limiting mechanism is simple and compact. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a structural diagram of the utility model;
[0022] Figure 2 This is an exploded view of the structure of the utility model;
[0023] Figure 3 Schematic diagram of the driving mechanism structure;
[0024] Figure 4 It is a schematic diagram of the limiting mechanism structure.
[0025] Among them: 1. Frame, 2. Rotating mechanism, 3. Driving mechanism, 4. Limiting mechanism, 5. Bearing, 6. Tensioning mechanism, 21. Rotating frame, 22. Impact block, 31. Driving motor assembly, 32. Driving sprocket, 33. Driven sprocket, 34. Transmission chain, 41. Follower assembly, 42. Buffer assembly, 411. Guide rail, 412. Slider, 421. Buffer unit, 422. Travel switch, 4211. Spring, 4212. Mounting seat, 4213. Buffer block, 61. Gear plate. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0027] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.
[0029] It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures. In the description of this utility model, it should be noted that the terms "upper" and "lower" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0030] See Figures 1 to 4 A limited rotation device for a medical electron linear accelerator comprises: a frame 1, a rotating mechanism 2, a driving mechanism 3, and a limiting mechanism 4. The frame 1 is fixedly placed on the ground and is used to securely mount the rotating mechanism 2, the driving mechanism 3, and the limiting mechanism 4. The frame 1 is rotationally connected to the rotating mechanism 2 via a bearing 5. The driving mechanism 3 and the limiting mechanism 4 are both fixedly mounted on the frame 1. The driving mechanism 3 is connected to the rotating mechanism 2 and is used to drive the rotating mechanism 2 to rotate. The limiting mechanism 4 is close to the rotating mechanism 2, and when the rotating mechanism 2 contacts the limiting mechanism 4, the limiting mechanism 4 is used to limit the rotation of the rotating mechanism 2.
[0031] The rotating mechanism 2 includes a rotating frame 21 and a collision block 22. The rotating frame 21 is rotatably connected to the frame 1 through a bearing 5. One end of the collision block 22 is fixedly connected to the rotating frame 21, and the other end extends to the limiting mechanism 4. When the rotating frame 21 rotates, the collision block 22 contacts the limiting mechanism 4.
[0032] The driving mechanism 3 includes a driving motor assembly 31, a driving sprocket 32, and a driven sprocket 33. The driving motor assembly 31 is fixedly mounted on the frame 1. The driving sprocket 32 and the driven sprocket 33 are connected to each other via a transmission chain 34. The driving sprocket 32 is fixedly connected to the output end of the driving motor assembly 31, and the driven sprocket 33 is fixedly connected to the rotating frame 21 via bolts. Considering the large size and heavy weight of the rotating assembly, preferably, the driving motor assembly 31 includes a motor and a reducer. The output end of the motor is fixedly connected to the input end of the reducer, and the output end of the reducer is fixedly connected to the driving sprocket 32. The purpose of adding a reducer is to increase the output torque of the motor to drive the heavy rotating frame 21 to rotate.
[0033] The limiting mechanism 4 includes a follower assembly 41 and a buffer assembly 42, both of which are fixedly mounted on the frame 1. The follower assembly 41 is located between the buffer assembly 42 and the rotating frame 21. During the rotation of the rotating mechanism 2, the impact block 22 contacts the follower assembly 41.
[0034] The follower assembly 41 includes a guide rail 411 and a slider 412 adapted to the guide rail 411. The guide rail 411 is arranged in an arc shape. The slider 412 is slidably connected to the guide rail 411, and the slider 412 slides on the guide rail 411. The center of the guide rail 411 is consistent with the center of the rotating frame 21 to ensure that the slider 412 on the arc can move with the impact block 22 when it contacts the impact block 22. During the rotation of the rotating mechanism 2, one end of the slider 412 contacts the impact block 22, and the other end contacts the buffer assembly 42. Preferably, the follower assembly 41 also includes a base plate, the guide rail 411 and the slider 412 are mounted on the base plate, and the base plate is fixedly mounted on the frame 1.
[0035] The buffer assembly 42 includes two buffer units 421 disposed opposite to each other, the slider 412 is located between the two buffer units 421, and a travel switch 422 is provided on one side of each buffer unit 421. The travel switch 422 is fixedly mounted on the frame 1 via a base.
[0036] The buffer unit 421 includes a spring 4211, one end of which is fixedly connected to a mounting seat 4212, and the other end of which is fixedly connected to a buffer block 4213. The mounting seat 4212 is fixedly mounted on the frame 1, and the buffer block 4213 contacts the slider 412. The spring 4211 acts as a buffer to limit the rotation of the rotating mechanism 2 and prevent sudden stops.
[0037] The buffer block 4213, the slider 412 and the impact block 22 are all provided with buffer pads. The mutual contact surfaces between the buffer block 4213 and the slider 412, and the mutual contact surfaces between the slider 412 and the impact block 22 are all provided with buffer pads, which play a buffering role when the two contact each other.
[0038] The length of the guide rail 411 is adjustable. The adjustable length of the guide rail allows for adjustment of the limiting angle, increasing the flexibility of the limiting mechanism 4. The length of the guide rail 411 can be adjusted by replacing guide rails 411 of different lengths or by using a telescopically adjustable guide rail 411.
[0039] Between the driving sprocket 32 and the driven sprocket 33, tensioning mechanisms 6 are provided on both sides of the transmission chain 34. The tensioning mechanisms 6 are used to adjust the tightness of the transmission chain 34 to prevent the chain from being too loose. Each tensioning mechanism 6 includes a gear plate 61 that meshes with the transmission chain 34.
[0040] The working principle of this utility model is:
[0041] The staff starts the drive motor assembly 31 as needed, which drives the driving sprocket 32 to rotate. The rotation of the driving sprocket 32 drives the driven sprocket 33 to rotate through the transmission chain 34. The driven sprocket 33 is fixedly mounted on the rotating frame 21. The rotation of the driven sprocket 33 drives the rotation of the rotating frame 21 to achieve the purpose of rotating the rotating frame 21. At the same time, because the tensioning mechanism 6 is provided on both sides of the transmission sprocket, the transmission chain 34 meshes with the gear plate 61. The transmission of the transmission chain 34 drives the gear plate 61 of the tensioning mechanism 6 to rotate. By adjusting the position of the gear plate 61 of the tensioning mechanism 6, the tightness of the transmission chain 34 can be adjusted.
[0042] When the rotating frame 21 rotates, when the impact block 22 contacts one end of the slider 412, the impact block 22 drives the slider 412 to move synchronously on the slide rail. When the other end of the slider 412 contacts the buffer block 4213, as the rotating frame 21 continues to rotate, the slider 412 continues to rotate, and the spring 4211 is compressed. At this time, the travel switch 422 next to the spring 4211 is triggered, the drive motor assembly 31 stops rotating, and the limit mechanism 4 realizes the rotation limit.
[0043] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A limited rotation device for a medical electron linear accelerator, characterized in that: include: A frame (1), a rotating mechanism (2), a driving mechanism (3) and a limiting mechanism (4), wherein the frame (1) is rotationally connected to the rotating mechanism (2) via a bearing (5), and the driving mechanism (3) and the limiting mechanism (4) are both fixedly mounted on the frame (1); the driving mechanism (3) is connected to the rotating mechanism (2) and is used to drive the rotating mechanism (2) to rotate; the limiting mechanism (4) is close to the rotating mechanism (2), and when the rotating mechanism (2) contacts the limiting mechanism (4), the limiting mechanism (4) is used to limit the rotation of the rotating mechanism (2).
2. The position limiting rotation device of a medical electron linear accelerator according to claim 1, characterized in that: The rotating mechanism (2) comprises a rotating frame (21) and a collision block (22); the rotating frame (21) is rotatably connected to the frame (1) via a bearing (5); one end of the collision block (22) is fixedly connected to the rotating frame (21), and the other end extends to the position limiting mechanism (4); when the rotating frame (21) rotates, the collision block (22) contacts the position limiting mechanism (4).
3. The rotation limiting device for a medical electron linear accelerator according to claim 2, characterized in that: The driving mechanism (3) comprises a driving motor assembly (31), a driving sprocket (32) and a driven sprocket (33); the driving motor assembly (31) is fixedly mounted on the frame (1); the driving sprocket (32) and the driven sprocket (33) are connected to each other via a transmission chain (34); the driving sprocket (32) is fixedly connected to the output end of the driving motor assembly (31); and the driven sprocket (33) is fixedly connected to the rotating frame (21) via bolts.
4. The rotation limiting device for a medical electron linear accelerator according to claim 2, wherein: The limiting mechanism (4) comprises a follower assembly (41) and a buffer assembly (42) both fixedly mounted on the frame (1); the follower assembly (41) is located between the buffer assembly (42) and the rotating frame (21); and during the rotation of the rotating mechanism (2), the impact block (22) contacts the follower assembly (41).
5. The rotation limiting device for a medical electron linear accelerator according to claim 4, characterized in that: The follower assembly (41) comprises a guide rail (411) and a slider (412) adapted to the guide rail (411); the guide rail (411) is arranged in an arc shape; the slider (412) is slidably connected to the guide rail (411); during the rotation of the rotating mechanism (2), one end of the slider (412) contacts the collision block (22) and the other end contacts the buffer assembly (42).
6. The rotation limiting device for a medical electron linear accelerator according to claim 5, characterized in that: The buffer assembly (42) comprises two buffer units (421) arranged opposite to each other, the slider (412) is located between the two buffer units (421), and a travel switch (422) is provided on one side of each buffer unit (421).
7. The rotation limiting device for a medical electron linear accelerator according to claim 6, characterized in that: The buffer unit (421) comprises a spring (4211), one end of the spring (4211) is fixedly connected to a mounting seat (4212), and the other end is fixedly connected to a buffer block (4213), the mounting seat (4212) is fixedly mounted on the frame (1), and the buffer block (4213) is in contact with the slider (412).
8. The position limiting rotation device of a medical electron linear accelerator according to claim 7, characterized in that: The buffer block (4213), the sliding block (412) and the impact block (22) are all provided with buffer pads.
9. The rotation limiting device for a medical electron linear accelerator according to claim 5, wherein: The length of the guide rail (411) is adjustable.
10. The rotation limiting device for a medical electron linear accelerator according to claim 3, characterized in that: Between the driving sprocket (32) and the driven sprocket (33), tensioning mechanisms (6) are provided on both sides of the transmission chain (34), and each of the tensioning mechanisms (6) includes a gear plate (61), and the gear plate (61) is engaged with the transmission chain (34).