A cam type X-ray automatic filtering device
Through the cam-type X-ray automatic filtering device, the cam transmission and gear meshing transmission are used to achieve rapid switching of the filter layer, which solves the problems of slow filtration response speed and insufficient reliability of the traditional beam limiter, and achieves the rapid filtering. Smooth switching and multiple thickness filtration requirements improve equipment reliability and space efficiency.
Patent Information
- Application Number
- CN202011202313.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-11-02
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2040-11-02
AI Technical Summary
The traditional beam limiter responds slowly when replacing the filter when filtering soft rays, which has noise, takes up a lot of space, and is not reliable, making it difficult to meet the filtering needs of different thicknesses.
The cam-type X-ray automatic filtering device is adopted, including a drive device, a cam assembly, a swing rod assembly and a filter layer assembly. The filter layer is quickly switched through cam transmission and gear meshing transmission, and closed-loop control is carried out by combining the positioning module and the U-type sensor. , realize four thickness filtration.
It realizes rapid switching of filters, smooth motion without impact, compact structure and small space, low cost, high transmission reliability, and can achieve flexible switching of multiple filter thicknesses.
Smart Images
Figure CN112190273B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of beam limiter work auxiliary equipment, and in particular relates to a cam type X-ray automatic filtering device. Background Art
[0002] X-rays are widely used in medicine because of their penetrating effects, differential absorption, photosensitivity and fluorescence. When X-rays pass through different parts of the human body, the extent to which X-rays are absorbed by different parts of the human body is different, so the amount of X-rays passing through different parts of the human body is also different, resulting in a large difference in the intensity of the fluorescence or photosensitivity produced on the fluorescent screen or photographic film, which can then display shadows representing different densities, and provide medical personnel with a basis for diagnosis by imaging on the film. However, there are soft rays in X-rays that are harmful to the human body. In order to protect the health of patients, a beam limiter is usually set in the X-ray machine to adjust the size of the human body detection part and filter the soft rays. Usually, a filter is set inside the beam limiter to filter the soft rays. Among them, when the beam limiter responds to different filtering requirements, filters of different thicknesses are needed to filter different amounts of soft rays, so the filters need to be replaced. For example, compared with the detection of adults, thicker filters are needed for the detection of young children. At present, the mainstream choice for traditional beam limiters is to replace filters through methods such as gear transmission, electromagnet transmission, and electronically controlled sliding. Some replacements have a slow response speed, and some use spring returns, which cause noise and affect the treatment environment. Most of the existing switching structures occupy a large space and are not reliable enough. Summary of the invention
[0003] In order to solve the above technical problems, the present invention provides a cam-type X-ray automatic filtering device, which can flexibly realize the rapid switching of filters with different thicknesses.
[0004] The present invention is implemented in this way. A cam-type X-ray automatic filtering device is provided, comprising a mounting seat and a driving device, a cam assembly, a rocker assembly and a filter layer assembly arranged on the mounting seat. The driving device is connected to the cam assembly. The cam assembly at least comprises a cam A and a cam B arranged up and down. The rocker assembly at least comprises a rocker A and a rocker B arranged up and down. The filter layer assembly at least comprises a filter layer A and a filter layer B arranged up and down. One end of the rocker A and the rocker B are rotatably connected to the mounting seat, and the other end is respectively engaged and docked with the filter layer A and the filter layer B. The filter layer A and the filter layer B are rotatably connected to the mounting seat. The cam A and the cam B are in line contact with the rocker A and the rocker B respectively. One end of the rocker A and the rocker B rotatably connected to the mounting seat is also connected to a tension spring A and a tension spring B respectively. The other end of the tension spring A and the tension spring B is fixed to the mounting seat.
[0005] Preferably, it also includes a positioning module assembly, which includes a positioning module A and a positioning module B. The positioning module A and the positioning module B are respectively arranged at the swing limit positions on both sides of the docking ends of the swing rod A and the swing rod B and the filter layer A and the filter layer B. The positioning module A and the positioning module B are both provided with two U-shaped sensors for sensing the limit positions on both sides of the swing rod A and the swing rod B, respectively.
[0006] Further preferably, the cam A is a shuttle-shaped structure, and the cam B is a fan-shaped structure. When the cam A pushes the rocker arm A to the farthest position, the cam B begins to contact the rocker arm B. During the return process of the rocker arm A, the cam B pushes the rocker arm B to the farthest position. The cam A pushes the rocker arm A to the farthest position again, and the position of the rocker arm B remains unchanged.
[0007] Further preferably, one end of the rocker A and the rocker B are both rack-type structures, and the filter layer A and the filter layer B are both provided with half-gear structures, and the rack-type structures on the rocker A and the rocker B are meshed with the half-gear structures on the filter layer A and the filter layer B respectively.
[0008] Further preferably, the filter layer A is a 0.1 mm Cu filter layer, and the filter layer B is a 0.2 mm Cu filter layer.
[0009] Further preferably, the driving device is a driving motor, the rotating shaft of the driving motor passes through the mounting seat, and the cam assembly is fixedly sleeved on the rotating shaft.
[0010] Compared with the prior art, the advantages of the present invention are:
[0011] 1. Two filter layers realize four kinds of thickness filtration, with simple structure;
[0012] 2. The transmission structure is cam transmission and gear meshing transmission, the movement is smooth and collision-free, and the reliability is high;
[0013] 3. When changing the filter layer, the motor rotates continuously, and there is no need to switch the direction to switch the filter layer;
[0014] 4. Equipped with a sensor module, the filter layer position can be controlled in a closed loop;
[0015] 5. The overall structure is compact, occupies little space and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A structural diagram of a cam-type automatic X-ray filtering device provided by the present invention;
[0017] Figure 2 It is the structural diagram of the cam assembly;
[0018] Figure 3 A position relationship diagram of the cam-type X-ray automatic filtering device provided by the present invention in the beam limiter;
[0019] Figure 4 This is a schematic diagram of the working position of the cam-type X-ray automatic filtering device when the filter layer is 0mmCu;
[0020] Figure 5 This is a schematic diagram of the working position of the cam-type X-ray automatic filtering device when the filter layer is 0.1mmCu;
[0021] Figure 6 This is a schematic diagram of the working position of the cam-type X-ray automatic filtering device when the filter layer is 0.2mmCu;
[0022] Figure 7 This is a schematic diagram of the working position of the cam-type X-ray automatic filtering device when the filter layer is 0.3mmCu. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0024] refer to Figure 1 and Figure 2 A cam-type X-ray automatic filtering device comprises a mounting seat 1 and a driving device, a cam assembly, a rocker assembly and a filter layer assembly arranged on the mounting seat 1, the driving device is connected to the cam assembly, the cam assembly at least comprises a cam A2 and a cam B3 arranged up and down, the rocker assembly at least comprises a rocker A4 and a rocker B5 arranged up and down, the filter layer assembly at least comprises a filter layer A6 and a filter layer B7 arranged up and down, one end of the rocker A4 and the rocker B5 are rotatably connected to the mounting seat 1 through a first rotating shaft 13, and the other ends are respectively meshed and docked with the filter layer A6 and the filter layer B7, the filter layer A6 and the filter layer B7 are rotatably connected to the mounting seat 1 through a second rotating shaft 14, the cam A2 and the cam B3 are in line contact with the rocker A4 and the rocker B5 respectively, one end of the rocker A4 and the rocker B5 rotatably connected to the mounting seat 1 is also respectively connected to a tension spring A8 and a tension spring B9, and the other ends of the tension spring A8 and the tension spring B9 are fixed to the mounting seat 1. In order to reduce the friction between the rotating member and the two rotating shafts, the rotating member and the two rotating shafts are connected via a bushing 15 .
[0025] refer to Figure 3 , the device provided in this embodiment is installed in the beam limiter, and during operation, reference is made to Figure 4 In the initial state, both filter layers are not in the filtering position. When filtering is required, refer to Figure 5The driving device drives the cam assembly to rotate, and the cam A2 drives the swing rod A4 to swing. The swing rod A4 drives the filter layer A6 to rotate through meshing. When the cam A2 drives the swing rod A4 to the farthest position, the filter layer A6 reaches the filtering position. If the filter layer needs to be filtered, the driving device can be turned off. When the filter layer needs to be replaced, refer to Figure 6 The driving device drives the cam assembly to rotate, and the swing rod A4 swings in the opposite direction under the tension of the tension spring A8, driving the filter layer A6 to leave the filtering position, and the cam B3 starts to push the swing rod B5 to swing away, and the swing rod B5 drives the filter layer B7 to rotate to the filtering position. If the filter layer needs to be filtered, the driving device can be turned off; when strict filtering is required, refer to Figure 7 , the driving device drives the cam assembly to continue to rotate, cam A2 pushes the swing rod A4 away again, and the filter layer A6 returns to the filtering position. Although cam B3 is also rotating, the structural design of cam B3 makes the swing rod B5 always in the farthest position, that is, the filter layer B7 is always in the filtering position. At this time, it is equivalent to having two filtering layers. Through the above process, the switching of no filtering, filtering layer A6 filtering alone, filtering layer B7 filtering alone, and filtering layer A6 and filter layer B7 together is realized.
[0026] In order to carry out intelligent control of the device, as an improvement of the technical solution, a positioning module assembly is also included, and the positioning module assembly includes a positioning module A10 and a positioning module B11. The positioning module A10 and the positioning module B11 are respectively arranged at the swing limit positions on both sides of the docking ends of the rocker arm A4 and the rocker arm B5 and the filter layer A6 and the filter layer B7. The positioning module A10 and the positioning module B11 are both provided with two U-shaped sensors for sensing the limit positions on both sides of the rocker arm A4 and the rocker arm B5.
[0027] The first limit position sensor 1001 of the swing bar A and the first limit position sensor 1002 of the swing bar B are respectively provided on the positioning module A10, and the second limit position sensor 1101 of the swing bar A and the second limit position sensor 1102 of the swing bar B are respectively provided on the positioning module B11, and U-shaped sensor baffles are provided at both ends of the swing bar A4 and the swing bar B5 to trigger the U-shaped sensors at the corresponding positions. The sensor transmits its sensing signal to the control mainboard, thereby determining what filtering state the filtering position is at this time, and controlling the start and stop of the driving device as needed.
[0028] As a specific structural form of the cam assembly, the cam A2 is a shuttle-shaped structure, and the cam B3 is a fan-shaped structure. When the cam A2 pushes the rocker rod A4 to the farthest position, the cam B3 begins to contact the rocker rod B5. During the return process of the rocker rod A4, the cam B3 pushes the rocker rod B5 to the farthest position, and the cam A2 pushes the rocker rod A4 to the farthest position again, and the position of the rocker rod B5 remains unchanged.
[0029] The structural design of cam A2 and cam B3 only needs to be able to drive the rocker arm A4 and the rocker arm B5 according to the above-mentioned movement process, that is, for the filter layer A6 and the filter layer B7, there is no filter layer in the filtering position, only the filter layer A6 in the filtering position, only the filter layer B7 in the filtering position, and both the filter layer A6 and the filter layer B7 are in the filtering position.
[0030] In order to achieve stable transmission, as an improvement of the technical solution, one end of the rocker rod A4 and the rocker rod B5 are both rack-type structures, and the filter layer A6 and the filter layer B7 are both provided with half-gear structures, and the rack-type structures on the rocker rod A4 and the rocker rod B5 are respectively meshed with the half-gear structures on the filter layer A6 and the filter layer B7.
[0031] Preferably, the filter layer A6 is a 0.1 mm Cu filter layer, and the filter layer B7 is a 0.2 mm Cu filter layer, that is, in the entire working process, Cu filtration with a thickness of 0 mm, 0.1 mm, 0.2 mm, and 0.3 mm is achieved.
[0032] Preferably, for the convenience of driving, the driving device is a driving motor 12, the rotating shaft of the driving motor 12 passes through the mounting seat 1, and the cam assembly is fixedly sleeved on the rotating shaft.
[0033] In fact, the cam-type X-ray automatic filtering device provided by the present invention can be designed with more layers of cam structures, rocker arms and filter layers according to different filtering requirements, so as to achieve more complex filter layer combinations and adjustments.
Claims
1. A cam type X-ray automatic filtering device, characterized in that: The invention comprises a mounting seat (1) and a driving device, a cam assembly, a swing rod assembly and a filter layer assembly arranged on the mounting seat (1); the driving device is connected to the cam assembly; the cam assembly at least comprises a cam A (2) and a cam B (3) arranged vertically; the swing rod assembly at least comprises a swing rod A (4) and a swing rod B (5) arranged vertically; the filter layer assembly at least comprises a filter layer A (6) and a filter layer B (7) arranged vertically; one end of the swing rod A (4) and the swing rod B (5) are rotatably connected to the mounting seat (1) The cams A (2) and B (3) are respectively in line contact with the swing rod A (4) and the swing rod B (5), and one end of the swing rod A (4) and the swing rod B (5) which are rotatably connected to the mounting seat (1) is also respectively connected to the tension spring A (8) and the tension spring B (9), and the other ends of the tension spring A (8) and the tension spring B (9) are fixed to the mounting seat (1); The cam A (2) is a shuttle-shaped structure, and the cam B (3) is a fan-shaped structure. When the cam A (2) pushes the rocker arm A (4) to the farthest position, the cam B (3) begins to contact the rocker arm B (5). When the rocker arm A (4) returns to its original position, the cam B (3) pushes the rocker arm B (5) to the farthest position. The cam A (2) pushes the rocker arm A (4) to the farthest position again, and the position of the rocker arm B (5) remains unchanged.
2. The cam type X-ray automatic filtering device according to claim 1, characterized in that: The invention also comprises a positioning module assembly, wherein the positioning module assembly comprises a positioning module A (10) and a positioning module B (11), wherein the positioning module A (10) and the positioning module B (11) are respectively arranged at the swing limit positions on both sides of the butt ends of the swing rod A (4) and the swing rod B (5) and the filter layer A (6) and the filter layer B (7), and the positioning module A (10) and the positioning module B (11) are both provided with two U-shaped sensors for respectively sensing the limit positions on both sides of the swing rod A (4) and the swing rod B (5).
3. The cam type X-ray automatic filtering device according to claim 1, characterized in that: One end of the swing rod A (4) and the swing rod B (5) are both rack-type structures, and the filter layer A (6) and the filter layer B (7) are both provided with a half-gear structure, and the rack-type structures on the swing rod A (4) and the swing rod B (5) are respectively meshed with the half-gear structures on the filter layer A (6) and the filter layer B (7).
4. The cam type X-ray automatic filtering device according to claim 1, characterized in that: The filter layer A (6) is a 0.1 mm Cu filter layer, and the filter layer B (7) is a 0.2 mm Cu filter layer.
5. The cam type X-ray automatic filtering device according to claim 1, characterized in that: The driving device is a driving motor (12), the rotating shaft of the driving motor (12) passes through the mounting seat (1), and the cam assembly is fixedly sleeved on the rotating shaft.