EPID overturning support

Abstract

The utility model discloses an EPID overturning support which comprises a fixed module, a movable module and a rotation limiting device. The EPID overturning support provided by the utility model has three degrees of freedom of translation in X and Z directions and rotation around Y directions, has multiple adjusting functions, can meet actual requirements, limits the rotation angle of a detector, and ensures the final rotation angle precision. The support can be fully unfolded in the working process and folded and stored in the non-working state, and motion interference is avoided.

Description

Technical Field

[0001] The utility model relates to the field of medical accelerators, and more specifically, the utility model relates to an EPID flipping bracket. Background Art

[0002] EPID, namely Electronic Portal Imaging Device, is usually used for field verification and dose verification. The detection plate of the EPID is usually installed on the gantry by a telescopic or flippable bracket and is located opposite the treatment head. Therefore, this device needs to be in two forms: folded storage and unfolded operation. When the Electronic Portal Imaging Device is in use, the rotation angle of the detector needs to be restricted.

[0003] However, the movement precision of the telescopic bracket and the flipping bracket in the prior art is poor, and the rotation angle of the detector is not restricted, resulting in problems such as incomplete angle flipping and deviation of the moving displacement, which also causes the EPID to not function accurately and efficiently. Summary of the Utility Model

[0004] The utility model overcomes the deficiencies in the prior art that cannot be adjusted back and forth and the displacement is not accurate, and provides an EPID flipping bracket in the hope of solving the problem that the rotation angle of the detector is not restricted.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An EPID flipping bracket, characterized by comprising a fixed module, a moving module, and a rotation limiting device;

[0007] The fixed module includes a fixed plate, a movable plate, a first guide rail assembly, and a first driving assembly;

[0008] The first guide rail assembly includes a first guide rail and a first slider. The first guide rail is installed on the fixed plate, the first slider is installed on the first guide rail, and the movable plate is installed on the first slider;

[0009] The first driving assembly is installed on the fixed plate, and the first driving assembly is connected to the movable plate to drive the movable plate to slide along the direction of the first guide rail;

[0010] The moving module includes a column and a rotation mounting plate;

[0011] The rotation limiting device is installed between the column and the rotation mounting plate, and the rotation limiting device restricts the rotation angle of the rotation mounting plate to 90°.

[0012] Before use, rotate the mounting plate to be parallel to the fixed plate, which occupies less space; during use, rotate the mounting plate to expand, and the detector mounted on the rotating mounting plate reaches the set angle to work. And because a rotation limiting device is provided, the rotation angle of the detector can be limited within 90°.

[0013] A further technical solution is that the rotation limiting device includes a rotation limiting block, a rotating shaft, and a limiting block mounting seat;

[0014] The rotating shaft is arranged between the column and the rotating mounting plate. The rotation limiting block is sleeved on the rotating shaft, and a matching key and keyway are arranged between the rotation limiting block and the rotating shaft;

[0015] The outer surface of the rotation limiting block is composed of two continuous surfaces, one of which is a limiting surface. The limiting surface includes a 90° arc surface and a plane extending in the tangential direction of the 90° arc surface;

[0016] The limiting block mounting seat is arranged on the rotating mounting plate. The rotating shaft passes through the limiting block mounting seat, and the limiting surface of the limiting block abuts against the plane of the rotating mounting plate.

[0017] When the extended plane contacts the rotating mounting plate, further rotation is not possible, achieving rotation limiting.

[0018] An even further technical solution is that the rotation limiting device includes a rotating shaft, an angle indicating rod, a limiting rod mounting plate, a first angle limiting rod, and a second angle limiting rod;

[0019] The rotating shaft is arranged between the column and the rotating mounting plate. The angle indicating rod is installed at the end of the rotating shaft. When the rotating shaft rotates, the angle indicating rod rotates together;

[0020] The first angle limiting rod and the second angle limiting rod are installed on the limiting rod mounting plate. The first angle limiting rod and the second angle limiting rod form a 90° angle with the axis of the second rotating shaft;

[0021] When the angle indicating rod contacts the first angle limiting rod and the second angle limiting rod, the rotation angle is limited.

[0022] An even further technical solution is that the moving module further includes a rotating power device, a second guide rail assembly, a second driving assembly, and a detector mounting plate;

[0023] The rotating mounting plate is rotatably connected to the column. The rotating power device is installed on the rotating mounting plate, and the rotating power device drives the rotating mounting plate to rotate;

[0024] The second guide rail assembly includes a second guide rail and a second slider. The second guide rail is installed on the rotating mounting plate, the second slider is installed on the second guide rail, and the detector mounting plate is installed on the second slider.

[0025] The second driving assembly is installed on the rotating mounting plate. The second driving assembly is connected to the detector mounting plate to drive the detector mounting plate to slide along the direction of the second guide rail.

[0026] During use, the rotating mounting plate rotates 90°. After rotation, the detector mounting plate can slide on the rotating mounting plate to complete the position adjustment in one direction. If it is necessary to adjust the radiation field and avoid interference, the movable plate can be moved in the front-back direction of the flat panel detector to realize the front-back adjustment of the flat panel detector, that is, the folding and the position adjustment in two perpendicular directions can be realized.

[0027] A further technical solution is that the first driving assembly includes a first driving motor, a first transmission assembly, a first lead screw support, a first ball screw, and a first nut seat.

[0028] The first ball screw is installed on the first lead screw support, the first lead screw support is installed on the fixed plate, the first nut seat is installed on the first ball screw, and the first transmission assembly is connected to the first driving motor and the first ball screw.

[0029] A further technical solution is that the second driving assembly includes a second driving motor, a second transmission assembly, a second lead screw support, a second ball screw, and a second nut seat.

[0030] The second ball screw is installed on the second lead screw support, the second lead screw support is installed on the rotating mounting plate, the second nut seat is installed on the second ball screw, and the second transmission assembly is connected to the second driving motor and the second ball screw.

[0031] Through the cooperation of the guide rail, slider, and driving assembly, the sliding of the movable plate, sliding mounting plate, and detector mounting plate can be restricted and supported by the guide rail, improving the control accuracy.

[0032] Compared with the prior art, the present utility model has at least the following beneficial effects: The EPID flipping bracket provided by the present utility model has translational movements in two directions of X and Z, and rotation around the Y direction, with a total of three degrees of freedom, has a variety of adjustment functions, can meet the actual needs, and restricts the rotation angle of the detector to avoid the problem of excessive rotation angle. The bracket can be fully unfolded during work and folded and stored in a non-working state. Description of the Drawings

[0033] Figure 1 It is a partially unfolded schematic diagram of the flipping bracket.

[0034] Figure 2 Schematic diagram of the fixed module structure

[0035] Figure 3 Schematic diagram of the first guide rail assembly and the first drive assembly structure

[0036] Figure 4 Schematic diagram of the moving module structure

[0037] Figure 5 Schematic diagram of the rotating limit block structure

[0038] Figure 6 Schematic diagram of the first rotating limit device structure

[0039] Figure 7 Schematic diagram of the second rotating limit device structure

[0040] Figure 8 Schematic diagram of the folding and retracting state of the flipping bracket

[0041] Figure 9 Schematic diagram of the deployed state of the flipping bracket

[0042] In the figure, 1 - fixed module, 11 - fixed plate, 12 - movable plate, 13 - first guide rail assembly, 131 - first guide rail, 132 - first slider, 14 - first drive assembly, 141 - first drive motor, 142 - first transmission assembly, 143 - first lead screw support, 144 - first ball screw, 145 - first nut seat, 2 - moving module, 21 - column, 22 - rotating mounting plate, 23 - rotating power device, 24 - second guide rail assembly, 25 - second drive assembly, 26 - detector mounting plate, 3 - first rotating limit device, 31 - rotating limit block, 32 - first rotating shaft, 33 - limit block mounting seat, 4 - second rotating limit device, 41 - second rotating shaft, 42 - angle indicating rod, 43 - limit rod mounting plate, 44 - first angle limit rod, 45 - second angle limit rod. Detailed implementation manners

[0043] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0044] An EPID flipping bracket, see Figures 1-9 , including a fixed module 1, a moving module 2, and a rotating limit device;

[0045] The fixed module 1 includes a fixed plate 11, a movable plate 12, a first guide rail assembly 13, and a first drive assembly 14;

[0046] The first guide rail assembly 13 includes a first guide rail 131 and a first slider 132. The first guide rail 131 is installed on the fixed plate 11, and the movable plate 12 is installed on the first slider 132.

[0047] The first driving assembly 14 is installed on the fixed plate 11 and is connected to the movable plate 12 to drive the movable plate 12 to slide along the direction of the first guide rail 131.

[0048] The first driving assembly 14 and the second driving assembly 25 can adopt control devices such as air cylinders, electric cylinders, and hydraulic rods. In this embodiment, the first driving assembly 14 includes a first driving motor 141, a first transmission assembly 142, a first lead screw support 143, a first ball screw 144, and a first nut seat 145.

[0049] The first ball screw 144 is installed on the first lead screw support 143, the first lead screw support 143 is installed on the fixed plate 11, the first nut seat 145 is installed on the first ball screw 144, and the first transmission assembly 142 is connected to the first driving motor 141 and the first ball screw 144.

[0050] The second ball screw is installed on the second lead screw support, the second lead screw support is installed on the rotating mounting plate 22, the second nut seat is installed on the second ball screw, and the second transmission assembly is connected to the second driving motor and the second ball screw.

[0051] The moving module 2 includes a column 21, a rotating mounting plate 22, a rotating power device 23, a second guide rail assembly 24, a second driving assembly 25, and a detector mounting plate 26.

[0052] The rotation limiting device is installed between the column 21 and the rotating mounting plate 22, and the rotation limiting device limits the rotation angle of the rotating mounting plate to 90°.

[0053] It should be understood that the rotation limiting device can adopt a stop block, a rotating connecting rod, etc. to achieve the limiting effect; and since there are two columns 21, installing the rotation limiting device between any set of the column 21 and the rotating mounting plate 22 can achieve the effect of limiting the rotation angle.

[0054] In this embodiment, the rotation limiting device includes a first rotation limiting device 3 and a second rotation limiting device 4.

[0055] In this embodiment, the first rotation limiting device 3 includes a rotation limiting block 31, a first rotating shaft 32, and a limiting block mounting seat 33.

[0056] The first rotating shaft 32 is arranged between the first vertical column and the rotating mounting plate 22. The rotating limiting block 31 is sleeved on the first rotating shaft 32. A cooperating key and keyway are provided between the rotating limiting block 31 and the first rotating shaft 32. In this embodiment, the keyway is provided on the rotating limiting block 31.

[0057] The outer surface of the rotating limiting block 31 consists of two continuous surfaces, one of which is a limiting surface. The limiting surface includes a 90° arc surface and a plane extending in the tangential direction of the 90° arc surface.

[0058] The rotating limiting block mounting seat 33 is arranged on the rotating mounting plate 22. The first rotating shaft 32 passes through the limiting block mounting seat 33, and the limiting surface of the rotating limiting block 31 abuts against the plane of the rotating mounting plate 22.

[0059] The second rotating limiting device 4 includes a second rotating shaft 41, an angle indicating rod 42, a limiting rod mounting plate 43, a first angle limiting rod 44, and a second angle limiting rod 45.

[0060] The second rotating shaft 41 is arranged between the second vertical column and the rotating mounting plate 22. The angle indicating rod 42 is mounted at the end of the second rotating shaft 41. When the second rotating shaft 41 rotates, the second rotating shaft 41 drives the angle indicating rod 42 to rotate together.

[0061] The first angle limiting rod 44 and the second angle limiting rod 45 are mounted on the limiting rod mounting plate 43, and the first angle limiting rod 44 and the second angle limiting rod 45 form a 90° angle with the axis of the second rotating shaft 41.

[0062] When the angle indicating rod 42 contacts the first angle limiting rod 44 and the second angle limiting rod 45, the rotation angle is limited. The specific working process is as follows: When the rotating mounting plate 22 is completely retracted, the angle indicating rod 42 is located at the position of the first angle limiting rod 44; as the rotating mounting plate 22 is continuously unfolded, the angle indicating rod 42 will gradually rotate towards the second angle limiting rod 45. When the angle indicating rod 42 rotates to the second angle limiting rod 45, the rotating mounting plate 22 is in the 90° unfolded position, and at this time, the rotating power device 23 stops driving, and the rotating mounting plate 22 no longer rotates. Similarly, when the rotating mounting plate 22 is completely unfolded at 90°, the angle indicating rod 42 is located at the position of the second angle limiting rod 45; as the rotating mounting plate 22 is continuously retracted, the angle indicating rod 42 will gradually rotate towards the first angle limiting rod 44. When the angle indicating rod 42 rotates to the first angle limiting rod 44, the rotating mounting plate 22 is in the 0° retracted position, and at this time, the rotating power device 23 stops driving, and the rotating mounting plate 22 no longer rotates.

[0063] If the actual angle of the EPID is not 90° due to the overall stiffness or wear of the bracket, the positions of the first angle limiting rod 44 and the second angle limiting rod 45 can be adjusted at this time. For example: if the actually deployed angle is greater than 90°, at this time, the angle between the first angle limiting rod 44 and the second angle limiting rod 45 is adjusted to be smaller so that the finally deployed angle is equal to 90°.

[0064] The rotation mounting plate 22 is rotatably connected to the column 21, and the rotation power device 23 is mounted on the rotation mounting plate 22, and the rotation power device 23 drives the rotation mounting plate 22 to rotate;

[0065] In this embodiment, the rotation power device 23 includes a driving motor, the output end of the driving motor is connected to a rotation gear, the rotation gear and a fixed gear form a gear transmission, and the fixed gear is mounted on the rotation mounting plate 22, thereby realizing the rotation of the rotation mounting plate 22.

[0066] The second guide rail assembly 24 includes a second guide rail and a second slider. The second guide rail is mounted on the rotation mounting plate 22, and the detector mounting plate 26 is mounted on the second slider;

[0067] In this embodiment, the number of the first guide rails 131 and the second guide rails is two.

[0068] The second driving assembly 25 is mounted on the rotation mounting plate 22, the second driving assembly 25 is connected to the detector mounting plate 26, and drives the detector mounting plate 26 to slide along the direction of the second guide rail. The second driving assembly 25 is similar to the first driving assembly 14.

[0069] When the device is in a non-working state, it is in a folded and retracted state.

[0070] When working, first translate the motion module along with the movable plate 12 to a suitable position in the middle of the first guide rail 131;

[0071] By the driving motor, the rotation mounting plate 22 is flipped to the 90° position, and the detector mounting plate 26 is driven to translate to a suitable position, and then relevant work can be carried out.

[0072] After the work is completed, the recovery of the bracket is opposite to the previous unfolding movement process.

[0073] Although the present invention has been described herein with reference to illustrative embodiments of the present invention, it should be understood that those skilled in the art can design many other modifications and embodiments that will fall within the scope and spirit of the principles disclosed in this application. More specifically, within the scope of the disclosure of this application, various variations and improvements can be made to the components and / or layout of the subject combination layout. In addition to the variations and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. An EPID flipping bracket, characterized in that, It includes a fixed module, a moving module, and a rotation limiting device; The fixed module includes a fixed plate, a movable plate, a first guide rail assembly, and a first driving assembly; The first guide rail assembly includes a first guide rail and a first slider. The first guide rail is installed on the fixed plate, the first slider is installed on the first guide rail, and the movable plate is installed on the first slider; The first driving assembly is installed on the fixed plate. The first driving assembly is connected to the movable plate and drives the movable plate to slide along the direction of the first guide rail; The moving module includes a column and a rotating mounting plate; The rotation limiting device is installed between the column and the rotating mounting plate, and the rotation limiting device limits the rotation angle of the rotating mounting plate to 90°; 2. The EPID flipping bracket according to claim 1, wherein The rotation limiting device includes a rotation limiting block, a rotating shaft, and a limiting block mounting seat; The rotating shaft is arranged between the column and the rotating mounting plate. The rotation limiting block is sleeved on the rotating shaft, and a matching key and keyway are arranged between the rotation limiting block and the rotating shaft; The outer surface of the rotation limiting block consists of two continuous surfaces, one of which is a limiting surface. The limiting surface includes a 90° arc surface and a plane extending in the tangential direction of the 90° arc surface; The limiting block mounting seat is arranged on the rotating mounting plate. The rotating shaft passes through the limiting block mounting seat, and the limiting surface of the limiting block abuts against the plane of the rotating mounting plate; 3. The EPID flipping bracket according to claim 1, wherein, The rotation limiting device includes a rotating shaft, an angle indicating rod, a limiting rod mounting plate, a first angle limiting rod, and a second angle limiting rod; The rotating shaft is arranged between the column and the rotating mounting plate. The angle indicating rod is installed at the end of the rotating shaft. When the rotating shaft rotates, the angle indicating rod rotates together; The first angle limiting rod and the second angle limiting rod are installed on the limiting rod mounting plate. The first angle limiting rod and the second angle limiting rod form a 90° angle with the axis of the second rotating shaft; When the angle indicating rod contacts the first angle limiting rod and the second angle limiting rod, the rotation angle is limited; 4. An EPID flipping bracket according to any one of claims 1 to 3, characterized in that The moving module further includes a rotation power device, a second guide rail assembly, a second driving assembly, and a detector mounting plate; The rotating mounting plate is rotatably connected to the column. The rotation power device is installed on the rotating mounting plate, and the rotation power device drives the rotating mounting plate to rotate; The second guide rail assembly includes a second guide rail and a second slider. The second guide rail is installed on the rotating mounting plate, the second slider is installed on the second guide rail, and the detector mounting plate is installed on the second slider; The second driving assembly is installed on the rotating mounting plate. The second driving assembly is connected to the detector mounting plate and drives the detector mounting plate to slide along the direction of the second guide rail; 5. An EPID flipping bracket according to claim 1, characterized in that, The first driving assembly includes a first driving motor, a first transmission assembly, a first lead screw support seat, a first ball screw, and a first nut seat; The first ball screw is installed on the first lead screw support seat. The first lead screw support seat is installed on the fixed plate. The first nut seat is installed on the first ball screw. The first transmission assembly is connected to the first driving motor and the first ball screw; 6. The EPID flipping bracket according to claim 4, characterized in that, The second driving assembly includes a second driving motor, a second transmission assembly, a second lead screw support seat, a second ball screw, and a second nut seat; The second ball screw is installed on the second screw support seat, the second screw support seat is installed on the rotating mounting plate, the second nut seat is installed on the second ball screw, and the second transmission assembly is connected to the second driving motor and the second ball screw.

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