A collimator blade adjustment device

Abstract

The utility model belongs to the technical field of beam limiter, concretely relates to a kind of beam limiter vane adjusting device, including substrate, vane component, toothed disc component and drive component;Two guide rods of vane component, two guide rods between being equipped with two vane, the two sides of vane are slidably connected with two guide rods respectively;Upper and lower toothed discs of toothed disc component, pressure block and mounting groove are equipped on upper toothed disc, the end of guide rod is pressed in mounting groove by pressure block, two symmetric avoidance holes and two symmetric mounting holes are respectively equipped on upper toothed disc and lower toothed disc, transmission shaft is matched with in two avoidance holes with clearance, the upper end of two transmission shafts is connected with two vane respectively, the lower end of two transmission shafts is located in two mounting holes respectively;Drive component includes first drive part and second drive part respectively for driving upper toothed disc and lower toothed disc rotation;To solve the prior art adjustment operation inconvenient, structure is complex, volume is larger, not conducive to the problem of beam limiter miniaturization design.

Description

Technical Field

[0001] This utility model belongs to the field of beam limiter technology, and specifically relates to a beam limiter blade adjustment device. Background Technology

[0002] In an X-ray machine, a collimator is typically installed below the X-ray tube. The tube emits X-rays, which are projected onto the subject through openings in the collimator's blades. The size of the collimator's blade openings determines the projection range of the emitted X-rays; any excess rays emitted from the tube that extend beyond the blade openings are absorbed and blocked by the blades. Because X-rays are harmful to the human body, to protect areas of the patient that do not require examination from X-ray exposure, it is necessary to control the projection range of the X-rays, ensuring that they only reach the areas requiring examination.

[0003] Existing beam limiters control the opening size of the beam limiter blades through a built-in blade adjustment device, thereby changing the actual X-ray irradiation field. For example, the blade drive structure of the X-ray machine disclosed in utility model patent CN 209059234 U uses a horizontal / vertical reversing wheel to drive a horizontal / vertical drive cable. The horizontal / vertical drive cable drives the horizontal / vertical blade support to slide on the horizontal / vertical blade guide rail through a horizontal / vertical guide block, thereby moving the horizontal / vertical blades and realizing the opening and closing of the horizontal / vertical blades, thus achieving the adjustment of the X-ray beam. This type of blade drive structure adopts a manual drive method, which is inconvenient to operate, difficult to control the adjustment accuracy, and has a relatively complex structure and large size, requiring a large installation space. This results in a large and heavy beam limiter, which is not conducive to the miniaturization design of the beam limiter. Utility Model Content

[0004] The purpose of this utility model is to provide a beam limiter blade adjustment device to solve the technical problems of inconvenient adjustment operation, complex structure, large size, and unfavorable to miniaturization design of beam limiters in the existing technology.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A beam limiter blade adjustment device includes a base plate and a blade assembly, a gear disk assembly, and a drive assembly disposed on the base plate. The blade assembly includes two symmetrically arranged guide rods, with two blades disposed between the two guide rods. The two sides of the blades are slidably connected to the two guide rods respectively. The gear disk assembly includes an upper gear disk and a lower gear disk with a central through hole. The upper gear disk has four pressure blocks and four mounting slots symmetrically arranged. One end of each pressure block is fixed to the upper gear disk, and the other end of each pressure block presses the end of the guide rod into the mounting slot. The upper and lower gear disks each have two symmetrical clearance holes and two symmetrical mounting holes. A drive shaft is fitted into each of the two clearance holes with clearance. The upper ends of the two drive shafts are connected to the two blades respectively, and the lower ends of the two drive shafts are located in the two mounting holes respectively. The drive assembly includes a first drive member and a second drive member, which are used to drive the upper and lower gear disks to rotate respectively.

[0007] Furthermore, the first driving component includes a first motor and a first rotating shaft fixed on the base plate. The output shaft of the first motor is provided with a first driving wheel, and the first rotating shaft is provided with a rotatable first upper gear and a first lower gear. The first upper gear and the first lower gear are fixedly connected. A first synchronous belt meshes on the first driving wheel and the first lower gear. The first upper gear meshes with an upper gear plate.

[0008] Furthermore, the second driving component includes a second motor and a second rotating shaft fixed on the base plate. The output shaft of the second motor is provided with a second driving wheel, and the second rotating shaft is provided with a rotatable second upper gear and a second lower gear. The second upper gear and the second lower gear are fixedly connected. A second synchronous belt meshes with the second driving wheel and the second upper gear, and the second lower gear meshes with the lower gear disc.

[0009] Furthermore, the gear assembly also includes a positioning ring with a flange. The positioning ring is fixed to the base plate by the flange, and both the upper and lower gears can be rotatably mounted on the positioning ring.

[0010] Furthermore, gaskets are provided between the upper and lower gear discs, and between the lower gear disc and the flange.

[0011] Compared with the prior art, the present invention has the following beneficial technical effects:

[0012] 1. This utility model uses a motor to provide driving force for adjusting the imaging area of ​​the blade assembly. It is convenient and quick to operate, and can accurately control the direction and size of the imaging area, improving the adjustment accuracy. Moreover, the first and second driving components are independent of each other, which can realize the adjustment of the direction and size of the rectangular imaging area of ​​the blade assembly, making the imaging area more consistent with the detection area, reducing the interference area, improving the imaging accuracy of the monitoring area, and reducing unnecessary radiation range. When it is necessary to adjust the direction of the imaging area, the first and second driving components drive the upper and lower gear disks to rotate synchronously around the positioning ring as the axis, so that the blade assembly follows the rotation of the gear disk assembly and changes the orientation of the two blades. When it is necessary to adjust the size of the imaging area, only the second driving component drives the lower gear disk to rotate. Under the thrust of the lower gear disk, the two transmission shafts drive the two blades to move closer or further apart along the guide rod, changing the gap between the two blades.

[0013] 2. The present invention has a simple structure, with each component installed and fitted together in a compact manner, resulting in a small size. This effectively saves the internal installation space of the beam limiter and is conducive to the miniaturization design of the beam limiter. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 Exploded view;

[0016] Figure 3 This is a top view of the present invention;

[0017] Figure 4 for Figure 3 A cross-sectional view along the AA direction.

[0018] In the figure: base plate 1, blade assembly 2, guide rod 21, blade 22, drive shaft 23, gear assembly 3, upper gear 31, mounting groove 311, clearance hole 312, lower gear 32, mounting hole 321, pressure block 33, positioning ring 34, flange 341, washer 35, first drive component 4, first rotating shaft 41, first driving wheel 42, first upper gear 43, first lower gear 44, first synchronous belt 45, second drive component 5, second rotating shaft 51, second driving wheel 52, second upper gear 53, second lower gear 54, second synchronous belt 55. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method:

[0020] Example

[0021] like Figure 1As shown, a beam limiter blade adjustment device includes a base plate 1 with a rectangular emission hole in the center, and a blade assembly 2, a toothed disk assembly 3 and a drive assembly disposed on the base plate 1.

[0022] like Figure 2 and 3 As shown, the blade assembly 2 includes two symmetrically arranged guide rods 21, and two blades 22 are provided between the two guide rods 21. The two sides of the blades 22 are slidably connected to the two guide rods 21 respectively.

[0023] like Figure 2-4 As shown, the gear assembly 3 includes an upper gear 31, a lower gear 32, and a positioning ring 34. Both the upper gear 31 and the lower gear 32 have a central through hole. Both the upper gear 31 and the lower gear 32 can be rotatably mounted on the positioning ring 34. A flange 341 is formed at the bottom of the positioning ring 34. The flange 341 is fixed to the base plate 1 by screws. Washers 35 are provided between the upper gear 31 and the lower gear 32, and between the lower gear 32 and the flange 341. Four mounting slots 311 are symmetrically provided on the upper gear 31. The ends of the two guide rods 21 are... The guide rod 21 is attached to four mounting slots 311. Each mounting slot 311 is fixed with a pressure block 33 by screws. The free end of the pressure block 33 presses the end of the guide rod 21 into the mounting slot 311. The upper gear plate 31 and the lower gear plate 32 are respectively provided with two symmetrical clearance holes 312 and two symmetrical mounting holes 321. The two clearance holes 312 are fitted with drive shafts 23 with clearance. The upper ends of the two drive shafts 23 are respectively fixedly connected to two blades 22, and the lower ends of the two drive shafts 23 are respectively located in the two mounting holes 321.

[0024] like Figure 2-4 As shown, the drive assembly includes a first drive member 4 and a second drive member 5, which are used to drive the upper gear disk 31 and the lower gear disk 32 to rotate, respectively. The first drive member 4 includes a first motor (not shown in the figure) and a first rotating shaft 41 fixed on the base plate 1. A first driving wheel 42 is fixed on the output shaft of the first motor. A rotatable first upper gear 43 and a first lower gear 44 are provided on the first rotating shaft 41. The first upper gear 43 and the first lower gear 44 are fixedly connected. The first driving wheel 42 and the first lower gear 44 are... The upper drive unit 5 includes a first synchronous belt 45, and a first upper gear 43 meshes with an upper gear disk 31; the second drive unit 5 includes a second motor (not shown in the figure) fixed on the base plate 1 and a second rotating shaft 51. A second drive wheel 52 is fixed on the output shaft of the second motor. A rotatable second upper gear 53 and a second lower gear 54 are provided on the second rotating shaft 51. The second upper gear 53 and the second lower gear 54 are fixedly connected. A second synchronous belt 55 meshes with the second drive wheel 52 and the second upper gear 53. The second lower gear 54 meshes with the lower gear disk 32.

[0025] This utility model has a simple structure, with each component installed and fitted compactly, resulting in a small size. This effectively saves installation space inside the beam limiter and facilitates miniaturization design. The first and second motors provide driving force for adjusting the imaging area of ​​the blade assembly 2, making operation convenient and quick. They can precisely control the direction and size of the imaging area, improving adjustment accuracy. Furthermore, the first driving component 4 and the second driving component 5 are independent of each other, enabling adjustment of the direction and size of the rectangular imaging area of ​​the blade assembly 2. This makes the imaging area more consistent with the detection area, reduces interference areas, improves the imaging accuracy of the monitoring area, and reduces unnecessary radiation range.

[0026] The specific implementation is as follows:

[0027] When the orientation of the imaging area needs to be adjusted, the first motor and the second motor drive the first drive wheel 42 and the second drive wheel 52 to rotate, respectively. The first synchronous belt 45 and the second synchronous belt 55 transmit power to the first lower gear 44 and the second upper gear 53, respectively, so that the first upper gear 43 and the second lower gear 54 rotate synchronously. The first upper gear 43 and the second lower gear 54 drive the upper gear disk 31 and the lower gear disk 32 to rotate synchronously around the positioning ring 34, so that the blade assembly 2 rotates with the upper gear disk 31 and the lower gear disk 32, changing the orientation of the two blades 22.

[0028] When the size of the imaging area needs to be adjusted, the second drive wheel 52 is driven to rotate by the second motor, and the second synchronous belt 55 transmits power to the second upper gear 53. The second lower gear 54 rotates accordingly. The second lower gear 54 drives the lower gear disk 32 to rotate around the positioning ring 34. During the rotation of the lower gear disk 32, the transmission shaft 23 in the two mounting holes 321 moves under the thrust of the lower gear disk 32, causing the two blades 22 to move closer or further away from each other along the guide rod 21, changing the gap between the two blades 22, so that the rectangular imaging area between the two blades 22 gradually shrinks or increases.

[0029] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A collimator blade adjustment device, characterized by: The system includes a base plate (1) and a blade assembly (2), a gear disk assembly (3), and a drive assembly disposed on the base plate (1). The blade assembly (2) includes two symmetrically arranged guide rods (21), and two blades (22) are disposed between the two guide rods (21). The two sides of the blades (22) are slidably connected to the two guide rods (21) respectively. The gear disk assembly (3) includes an upper gear disk (31) and a lower gear disk (32) with a central through hole. The upper gear disk (31) is symmetrically provided with four pressure blocks (33) and four mounting slots (311). One end of the pressure block (33) is fixed to the upper gear disk (31), and the other end of the pressure block (33) guides the upper gear disk (31). The end of the rod (21) is pressed into the mounting groove (311). The upper gear plate (31) and the lower gear plate (32) are respectively provided with two symmetrical clearance holes (312) and two symmetrical mounting holes (321). The two clearance holes (312) are fitted with transmission shafts (23). The upper ends of the two transmission shafts (23) are respectively connected to the two blades (22), and the lower ends of the two transmission shafts (23) are respectively located in the two mounting holes (321). The drive assembly includes a first drive member (4) and a second drive member (5). The first drive member (4) and the second drive member (5) are respectively used to drive the upper gear plate (31) and the lower gear plate (32) to rotate.

2. The collimator blade adjustment device of claim 1, wherein: The first driving component (4) includes a first motor and a first rotating shaft (41) fixed on the base plate (1). The output shaft of the first motor is provided with a first driving wheel (42). The first rotating shaft (41) is provided with a rotatable first upper gear (43) and a first lower gear (44). The first upper gear (43) and the first lower gear (44) are fixedly connected. A first synchronous belt (45) meshes on the first driving wheel (42) and the first lower gear (44). The first upper gear (43) meshes with the upper gear plate (31).

3. A beam limiter blade adjustment device according to claim 2, wherein: The second drive unit (5) includes a second motor and a second rotating shaft (51) fixed on the base plate (1). The output shaft of the second motor is provided with a second drive wheel (52). The second rotating shaft (51) is provided with a rotatable second upper gear (53) and a second lower gear (54). The second upper gear (53) and the second lower gear (54) are fixedly connected. A second synchronous belt (55) meshes with the second drive wheel (52) and the second upper gear (53). The second lower gear (54) meshes with the lower gear disc (32).

4. The collimator blade adjustment device of claim 3, wherein: The gear assembly (3) also includes a positioning ring (34), on which a flange (341) is provided. The positioning ring (34) is fixed to the base plate (1) by the flange (341). The upper gear (31) and the lower gear (32) can be rotatably mounted on the positioning ring (34).

5. The beam limiter blade adjustment device according to claim 4, characterized in that: Gaskets (35) are provided between the upper gear plate (31) and the lower gear plate (32), and between the lower gear plate (32) and the flange (341).

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