X-ray beam limiting device

Abstract

The utility model relates to the field of beam limiting devices, and discloses an X-ray beam limiting device which comprises a shell, a movable support is arranged in the shell, lead plates used for shielding X-rays are arranged on the two sides of the movable support, the movable support comprises an upper-layer movable support and a lower-layer movable support, and the upper-layer movable support and the lower-layer movable support are arranged on the shell. Guide blocks are fixedly installed on the two sides of the movable support, a limiting rod is fixedly installed in the shell, the movable support is arranged on the outer side of the limiting rod in a sliding and sleeving mode through the guide blocks, a guide rod is fixedly installed in the shell, and a driving assembly is arranged in the shell; an electric telescopic rod pushes a push plate to move upwards, sleeves on the two sides can be pushed through a connecting rod, so that the sleeves drive the movable supports on the two sides to be separated, and similarly, when the electric telescopic rod drives the push plate to move downwards, the movable supports on the two sides can be close to each other, the distance between the movable supports can be adjusted, and a motor driving mode is replaced; and the shooting quality is prevented from being influenced by vibration.

Description

Technical Field

[0001] The utility model relates to the field of beam limiter equipment, in particular to an X-ray beam limiter. Background Art

[0002] The X-ray beam limiter is an auxiliary device used for X-ray inspection. Its main purpose is to be used for positioning during positioning. It can limit the size and shape of the X-rays to ensure that only specific areas receive X-ray irradiation, reduce radiation exposure in other areas, and make imaging clearer and more accurate by reducing the interference of scattered radiation.

[0003] For example, an X-ray beam limiter disclosed in the Chinese patent with publication number CN217740194U includes an outer frame and a movable bracket, one movable bracket is correspondingly provided with a driving assembly, a lead plate is provided in the middle of the movable bracket, the lead plate is used to shield the rays emitted by the ray source, the driving assembly includes a motor, a transmission screw and a guide rod, the motor and the guide rod are arranged on the movable bracket, the output shaft of the motor is gear-driven with the transmission screw, the transmission screw is rotationally connected with the outer frame, the transmission screw is threadedly driven with the movable bracket, and the movable bracket is slidably connected with the guide rod; under the drive of the motor, the output shaft drives the transmission screw to rotate to drive the movable bracket to slide along the guide rod. The X-ray beam limiter provided by the utility model converts the rotary motion of the movable bracket into linear motion by threaded transmission, greatly simplifies the internal structure of the beam limiter, and makes the whole more miniaturized and lightweight.

[0004] In the process of implementing this application, the inventor discovered that there are at least the following problems in this technology: although the above-mentioned technical solution can simplify the internal structure of the beam limiter, making the beam limiter more compact and lightweight as a whole, after its driving mode is changed to motor drive, during use, the motor will generate vibration when it starts, which will cause the beam limiter as a whole to vibrate, and then cause shaking during shooting, affecting the shooting quality. Therefore, further improvements can be made. Utility Model Content

[0005] To solve the above-mentioned problems, the utility model provides the following technical solutions: an X-ray beam limiter, comprising a shell, a movable bracket is arranged inside the shell, lead plates for shielding X-rays are arranged on both sides of the movable bracket, the movable bracket comprises an upper movable bracket and a lower movable bracket, and the upper movable bracket is arranged above the lower movable bracket, guide blocks are fixedly installed on both sides of the movable bracket, a limit rod is fixedly installed inside the shell, and the limit rod passes through the guide block, the movable bracket is slidably sleeved on the outside of the limit rod through the guide block, a guide rod is fixedly installed inside the shell, and a drive assembly is arranged inside the shell and directly below the guide rod.

[0006] As an optimization, the driving assembly includes a fixed frame fixedly mounted on the bottom wall of the outer shell directly below the guide rod, an electric telescopic rod is fixedly mounted inside the fixed frame, a push plate is fixedly mounted on the top telescopic end of the electric telescopic rod, both ends of the push plate are rotatably connected to a connecting rod, a sleeve is inserted into the inside of the guide block, a support is fixedly mounted on the bottom side of the sleeve, and the top of the connecting rod is rotatably connected to the support.

[0007] As an optimization, a PLC controller is provided at the bottom of the electric telescopic rod, and the PLC controller is signal-connected to the electric telescopic rod. The PLC controller controls the electric telescopic rod to extend and retract, thereby driving the push plate to move up and down.

[0008] As an optimization, the sleeve is arranged on the outside of the guide rod, and the sleeve corresponds to two groups of connecting rods arranged on both sides of the fixed frame. The push plate moves up and down, which drives the connecting rod to push and pull the support, and then drives the sleeves on both sides to slide along the guide rod away from or close to each other, thereby adjusting the distance between the upper movable brackets on both sides.

[0009] As an optimization, sliding grooves are provided on both sides of the fixed frame, and the push plate is slidably connected to the inside of the sliding groove. The push plate slides along the inner wall of the sliding groove, thereby limiting the push plate and allowing the push plate to maintain vertical movement.

[0010] As an optimization, the internal array of the sleeve has six groups of empty slots, a damper is fixedly installed on the bottom wall of the empty slot, a buffer spring is sleeved on the outer side of the damper, a slider is fixedly installed on the other end of the damper, and a ball is embedded inside the slider.

[0011] As an optimization, the slider is slidably connected inside the empty groove, and the ball is rollingly connected to the outside of the guide rod. The rolling of the ball along the guide rod can reduce the friction when the movable bracket slides. At the same time, the internal damper and buffer spring can buffer and reduce shock to the ball, so as to minimize the impact of vibration on the shooting quality.

[0012] The beneficial effects of the utility model are:

[0013] 1. The X-ray beam limiter will push the push plate upward by starting the electric telescopic rod, so it will push the sleeves on both sides through the connecting rod, so that the sleeves drive the movable brackets on both sides to separate. Similarly, when the push plate is driven downward by the electric telescopic rod, the movable brackets on both sides will be brought closer, and then the spacing between the movable brackets will be adjusted, and the motor drive method is replaced to avoid affecting the film quality due to vibration.

[0014] 2. The X-ray beam limiter reduces the friction when the bracket moves by rolling the ball along the outer wall of the guide rod, which is convenient for limiting the rays. When the ball rolls, the damper and the buffer spring are compressed, which plays a role in buffering and shock absorption, avoiding vibration when the mobile bracket moves and affecting the quality of the film, thereby further improving the quality of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the drive assembly of the utility model;

[0018] Figure 4 This is a schematic diagram of the friction reducing buffer structure of the utility model.

[0019] In the figure: 1. shell; 2. lead plate; 3. upper movable bracket; 4. lower movable bracket; 5. guide block; 6. limit rod; 7. guide rod; 8. drive assembly; 9. fixed frame; 10. electric telescopic rod; 11. push plate; 12. connecting rod; 13. sleeve; 14. support; 15. slide groove; 16. empty groove; 17. damper; 18. buffer spring; 19. slider; 20. ball bearing. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-2 An X-ray beam limiter comprises a shell 1, a movable bracket is arranged inside the shell 1, lead plates 2 for shielding X-rays are arranged on both sides of the movable bracket, the movable bracket comprises an upper movable bracket 3 and a lower movable bracket 4, and the upper movable bracket 3 is arranged above the lower movable bracket 4, guide blocks 5 are fixedly installed on both sides of the movable bracket, a limiting rod 6 is fixedly installed inside the shell 1, and the limiting rod 6 passes through the guide block 5, the movable bracket is slidably sleeved on the outside of the limiting rod 6 through the guide block 5, a guide rod 7 is fixedly installed inside the shell 1, and a driving assembly 8 is arranged inside the shell 1 and directly below the guide rod 7.

[0022] See also Figure 3The driving assembly 8 includes a fixed frame 9 fixedly mounted on the bottom wall of the housing 1 directly below the guide rod 7, an electric telescopic rod 10 is fixedly mounted inside the fixed frame 9, a PLC controller is arranged at the bottom of the electric telescopic rod 10, and the PLC controller and the electric telescopic rod 10 are connected by signal, a push plate 11 is fixedly mounted on the top telescopic end of the electric telescopic rod 10, and the electric telescopic rod 10 is controlled to be extended and retracted by the PLC controller, thereby driving the push plate 11 to move up and down;

[0023] See also Figure 3 , both ends of the push plate 11 are rotatably connected with connecting rods 12, and the guide block 5 is plugged with a sleeve 13, which is sleeved on the outside of the guide rod 7, and the sleeves 13 are arranged on both sides of the fixed frame 9 corresponding to the two groups of connecting rods 12, and the bottom side of the sleeve 13 is fixedly installed with a support 14, and the top of the connecting rod 12 is rotatably connected to the support 14. The push plate 11 moves up and down, which drives the connecting rod 12 to push and pull the support 14, and then drives the sleeves 13 on both sides to slide along the guide rod 7 away from or close to each other, so that the spacing between the upper movable brackets 3 on both sides is adjusted;

[0024] See also Figure 3 , a slide groove 15 is provided on both sides of the fixed frame 9, and the push plate 11 is slidably connected inside the slide groove 15. The push plate 11 slides along the inner wall of the slide groove 15, thereby limiting the push plate 11 so that the push plate 11 keeps moving vertically;

[0025] See also Figure 4 The internal array of the sleeve 13 has six groups of empty slots 16, and a damper 17 is fixedly installed on the bottom wall of the empty slot 16. A buffer spring 18 is sleeved on the outer side of the damper 17. A slider 19 is fixedly installed on the other end of the damper 17. The slider 19 is slidably connected to the inside of the empty slot 16. A ball 20 is embedded in the inside of the slider 19. The ball 20 is rollingly connected to the outer side of the guide rod 7. The rolling of the ball 20 along the guide rod 7 can reduce the friction when the movable bracket slides. At the same time, the internal damper 17 and the buffer spring 18 can buffer and reduce shock to the ball 20 to minimize the impact of vibration on the shooting quality.

[0026] When using, refer to Figure 1-4 First, the electric telescopic rod 10 is started by the controller, so that the push plate 11 is pushed to slide upward along the inner wall of the slide groove 15, and then the sleeve 13 is driven to slide along the outer side of the guide rod 7 through the connecting rod 12, so that the movable brackets on both sides are separated from each other, and then the spacing between the brackets is adjusted;

[0027] At the same time, when the sleeve 13 slides along the outer side of the guide rod 7, the ball 20 inside it will roll along the outer wall of the guide rod 7, thereby reducing the friction during its sliding, making it easier for the bracket to move back and forth. When the ball 20 is pressed, it will compress the damper 17 and the buffer spring 18, so it will play a role in buffering and shock absorption, thereby preventing the shaking of the mobile bracket when it moves from affecting the filming quality.

[0028] To sum up, the X-ray beam limiter, by starting the electric telescopic rod 10, will push the push plate 11 to move upward, so it will push the sleeves 13 on both sides through the connecting rod 12, so that the sleeves 13 drive the movable brackets on both sides to separate. Similarly, when the push plate 11 is driven downward by the electric telescopic rod 10, the movable brackets on both sides will be brought closer, and then the distance between the movable brackets will be adjusted, and the motor drive method will be replaced to avoid affecting the filming quality due to vibration.

[0029] By rolling the ball 20 along the outer wall of the guide rod 7, the friction force when the bracket moves can be reduced, which makes it easier to limit the rays. When the ball 20 rolls, the damper 17 and the buffer spring 18 are compressed, which can play a role in buffering and shock absorption, avoiding vibration when the mobile bracket moves and affecting the film quality, thereby further improving the film quality.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. An X-ray beam limiter, comprising a housing (1), characterized in that: A movable bracket is arranged inside the shell (1), and lead plates (2) for shielding X-rays are arranged on both sides of the movable bracket. The movable bracket comprises an upper movable bracket (3) and a lower movable bracket (4), and the upper movable bracket (3) is arranged above the lower movable bracket (4). Guide blocks (5) are fixedly installed on both sides of the movable bracket. A limit rod (6) is fixedly installed inside the shell (1), and the limit rod (6) passes through the guide block (5). The movable bracket is slidably sleeved on the outside of the limit rod (6) through the guide block (5). A guide rod (7) is fixedly installed inside the shell (1), and a drive assembly (8) is arranged inside the shell (1) and directly below the guide rod (7).

2. An X-ray beam limiter according to claim 1, characterized in that: The driving assembly (8) comprises a fixed frame (9) fixedly mounted on the bottom wall of the housing (1) directly below the guide rod (7); an electric telescopic rod (10) is fixedly mounted inside the fixed frame (9); a push plate (11) is fixedly mounted on the top telescopic end of the electric telescopic rod (10); both ends of the push plate (11) are rotatably connected to a connecting rod (12); a sleeve (13) is inserted inside the guide block (5); a support (14) is fixedly mounted on the bottom side of the sleeve (13); and the top of the connecting rod (12) is rotatably connected to the support (14).

3. An X-ray beam limiter according to claim 2, characterized in that: A PLC controller is arranged in the bottom of the electric telescopic rod (10), and the PLC controller and the electric telescopic rod (10) are signal-connected.

4. An X-ray beam limiter according to claim 2, characterized in that: The sleeve (13) is sleeved on the outside of the guide rod (7), and the sleeve (13) is arranged on both sides of the fixed frame (9) corresponding to the two groups of connecting rods (12).

5. The X-ray beam limiter according to claim 2, characterized in that: Slide grooves (15) are provided on both sides of the fixed frame (9), and the push plate (11) is slidably connected inside the slide grooves (15).

6. An X-ray beam limiter according to claim 2, characterized in that: The sleeve (13) has an internal array of six groups of empty slots (16), a damper (17) is fixedly mounted on the bottom wall of the empty slot (16), a buffer spring (18) is sleeved on the outer side of the damper (17), a slider (19) is fixedly mounted on the other end of the damper (17), and a ball (20) is embedded in the interior of the slider (19).

7. An X-ray beam limiter according to claim 6, characterized in that: The slide block (19) is slidably connected inside the empty groove (16), and the ball (20) is rollingly connected to the outside of the guide rod (7).

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