A cone beam ct scan adjustable jig

Abstract

This utility model relates to the field of nondestructive testing technology, specifically to an adjustable clamp for cone-beam CT scanning. It includes a mounting base and a disc mounted on top of the mounting base. A concave guide rail is provided on the top of the disc, and two movable members are slidably mounted on the concave guide rail. Each movable member has a locking head on one side for locking it. A clamping base plate is fixedly mounted on the top of each of the two movable members. A first inclined rod and a second inclined rod are respectively fixedly mounted on the top of the two clamping base plates. The inner sides of both the first and second inclined rods have slots, and the first and second inclined rods are inclined upwards in the same direction. This utility model can adapt to samples of different sizes and meet the clamping and fixing requirements of samples of different sizes; at the same time, it can ensure the stability of the sample being tested, providing stable clamping.

Description

Technical Field

[0001] This utility model relates to the field of nondestructive testing technology, specifically to an adjustable clamp for cone-beam CT scanning. Background Technology

[0002] Non-destructive testing is a technique that detects the internal structure and defects of an object without damaging it. Cone-beam CT can perform non-destructive testing on the object being tested. Cone-beam CT is a technique that uses a cone-shaped X-ray beam and a planar detector to perform three-dimensional imaging. It is mainly used in medical diagnosis and industrial inspection. It has the characteristics of fast scanning speed, low radiation dose, and can generate high-resolution three-dimensional images.

[0003] During cone-beam CT scanning, the sample being examined needs to remain highly stable. Any slight displacement or vibration will cause the projected image to become blurred, affecting the accuracy of 3D reconstruction. Therefore, the sample is usually held and fixed by a clamp during the examination to maintain stability. However, existing clamps are usually fixed structures, which cannot meet the clamping and fixing requirements of sample objects of different sizes, and their rigidity is insufficient. During cone-beam CT scanning, the sample is prone to displacement or vibration, resulting in insufficient stability of the clamped sample and affecting the imaging quality. Summary of the Invention

[0004] This invention addresses the problems of existing clamps being unable to hold and fix samples of different sizes and having insufficient stability. It provides an adjustable clamp for cone-beam CT scanning that can adapt to samples of different sizes, meeting the clamping and fixing requirements of samples of different sizes. At the same time, it can ensure the stability of the samples and stably hold them.

[0005] To achieve the above objectives, the technical solution of this utility model is: an adjustable clamp for cone-beam CT scanning, comprising a mounting base and a disc disposed on top of the mounting base. A concave guide rail is provided on the top of the disc, and two movable members are slidably mounted on the concave guide rail. A locking head for locking the movable members is provided on one side of each movable member, and a clamping base plate is fixedly mounted on the top of each of the two movable members. The movable members can slide on the concave guide rail, and the distance between the two movable members can be adjusted via the concave guide rail. The movable members drive the clamping base plates to move, achieving the effect of clamping and fixing samples of different sizes to be tested. After adjusting the distance between the two movable members, the locking head can lock the movable members to ensure their stability and prevent displacement.

[0006] On the tops of the two clamping bottom plates, a first inclined rod and a second inclined rod are respectively fixedly arranged. Grooves are formed on the inner sides of the first inclined rod and the second inclined rod. The first inclined rod and the second inclined rod are inclined upward in the same direction. The first inclined rod and the second inclined rod play a role in clamping and fixing the detected object sample. The clamping bottom plates at the tops of the two moving parts can respectively drive the first inclined rod and the second inclined rod to move, so as to adjust the distance between the first inclined rod and the second inclined rod, thereby meeting the clamping and fixing requirements of detected object samples of different sizes.

[0007] Further, three knobs are arranged in a triangular shape on the installation base. The knobs are rotationally connected to the installation base. A steel ball is fixedly embedded at the top of the knob, and a strip-shaped groove is formed at the bottom of the knob. The function of the strip-shaped groove is to facilitate the rotation of the knob by tools such as a screwdriver.

[0008] Further, three elliptical grooves corresponding to the knobs are arranged in a triangular shape at the bottom of the disc. The steel ball is located in the elliptical groove. The extension line of the long axis of each elliptical groove intersects with the central axis of the disc. The steel ball and the elliptical groove cooperate with each other, and both are distributed in a triangular shape, which can ensure that the disc can be stably placed on the top of the installation base and improve the stability of the detected object sample.

[0009] Further, the moving part includes a fixing plate and wheel-shaped sliders arranged at intervals at the bottom of the fixing plate. The clamping bottom plate is bolted to the top of the fixing plate. The wheel-shaped sliders are slidably arranged inside the concave guide rail. Through the cooperation of the wheel-shaped sliders and the concave guide rail, it is convenient to adjust the distance between the first inclined rod and the second inclined rod.

[0010] Further, adjacent two of the wheel-shaped sliders are arranged in a staggered manner. The wheel-shaped sliders are in clearance fit with the concave guide rail. The annular arc grooves of the wheel-shaped sliders match the arc protrusions on the inner side of the concave guide rail. While ensuring that the two clamping bottom plates can smoothly drive the first inclined rod and the second inclined rod to move, it can also prevent the distance between the wheel-shaped sliders and the concave guide rail from being too large and causing晃动, and prevent the detected object sample from shifting, thereby improving the stability of the clamped detected object sample.

[0011] Further, the lock head has a "convex" shape structure. A threaded column threadedly connected to the fixing plate is fixedly arranged at the end of the lock head. The end of the lock head abuts against the sides of the concave guide rail, the fixing plate and the clamping bottom plate. Through the cooperation of the locking head and the concave guide rail and the fixing plate, the fixing plate is rigidly locked to ensure the stability of the moving part and realize the stable clamping of the detected object sample.

[0012] Furthermore, the inner sides of the first inclined rod and the second inclined rod are parallel to each other, the angle between the inner side of the first inclined rod and the upper surface of the clamping base plate is an acute angle, and the angle between the inner side of the second inclined rod and the upper surface of the clamping base plate is an obtuse angle. The first and second inclined rods are precisely fixed at a fixed angle to the top of the clamping base plate, forming a stable support frame, thereby achieving stable clamping of the sample to be tested.

[0013] Furthermore, the width of both the first and second inclined rods gradually decreases from bottom to top. Both the first and second inclined rods have a trapezoidal structure and are made of acetal resin. The first and second inclined rods have high hardness, high stability, and wear resistance.

[0014] The beneficial effects of this utility model through the above technical solution are as follows:

[0015] This invention has a reasonable structure and good performance. It can be adapted to test samples of different sizes and can meet the clamping and fixing requirements of test samples of different sizes, thus improving its versatility. At the same time, it can ensure the stability of the test sample, stably clamp the test sample, and prevent the test sample from shifting, thereby improving the stability of clamping the test sample and improving the imaging quality of the test sample in cone-beam CT scanning.

[0016] This invention features two movable components that can slide on a concave guide rail, allowing for adjustment of the distance between them. The two movable components, via a clamping base plate, drive the first and second inclined rods to move, thereby adjusting the distance between them. This enables the clamping and fixing of samples of different sizes, providing flexible clamping and high versatility.

[0017] The first and second inclined rods of this invention are installed on the top of the clamping base plate with the same upward inclination. The first and second inclined rods are precisely assembled at a fixed angle to form a stable support frame, thereby achieving stable clamping of the sample to be tested at a certain angle. After the first and second inclined rods clamp the sample to be tested, the moving parts can be rigidly locked by the locking head to ensure the stability of the sample to be tested. Attached Figure Description

[0018] Figure 1 This is an axonometric view of an adjustable clamp for cone-beam CT scanning according to this utility model;

[0019] Figure 2 This is a front view of an adjustable clamp for cone-beam CT scanning according to this utility model;

[0020] Figure 3 This is a top view of an adjustable clamp for cone-beam CT scanning according to this utility model;

[0021] Figure 4 This is a bottom view of an adjustable clamp for cone-beam CT scanning according to this utility model;

[0022] Figure 5 This is a schematic diagram of the concave guide rail of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the fixing plate and the wheel-shaped slider of this utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the wheel-shaped slider of this utility model;

[0025] Figure 8 This is a schematic diagram of the structure of the mounting base of this utility model;

[0026] Figure 9 This is a schematic diagram of the structure of the disc of this utility model.

[0027] The numbers in the attached diagram are as follows: 1 is the mounting base, 101 is the knob, 102 is the steel ball, 2 is the disc, 201 is the elliptical groove, 3 is the concave guide rail, 4 is the fixing plate, 5 is the wheel-shaped slider, 6 is the lock head, 7 is the clamping base plate, 8 is the first inclined rod, 9 is the second inclined rod, and 10 is the slot. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0029] like Figures 1-9 As shown, an adjustable clamp for cone-beam CT scanning includes a mounting base 1 and a disc 2 disposed on top of the mounting base 1. The mounting base 1 is used to assemble the disc 2. A concave guide rail 3 is provided on the top of the disc 2, and the concave guide rail 3 is bolted to the top of the disc 2. Two moving parts are slidably disposed on the concave guide rail 3. A locking head 6 for locking the moving parts is provided on one side of each moving part. A clamping base plate 7 is fixedly disposed on the top of each of the two moving parts. In this embodiment, the distance between the two moving parts can be adjusted according to the size of the sample being tested. The moving parts can slide on the concave guide rail 3, which facilitates the adjustment of the distance between the two moving parts, thereby achieving clamping and fixing of sample objects of different sizes. When the sample being tested is clamped and fixed, the locking head 6 rigidly locks the moving parts to prevent the moving parts from sliding on the concave guide rail 3, thereby achieving stable clamping of the sample being tested.

[0030] The tops of the two clamping base plates 7 are respectively fixedly provided with a first inclined rod 8 and a second inclined rod 9. The inner sides of the first inclined rod 8 and the second inclined rod 9 are provided with slots 10. The first inclined rod 8 and the second inclined rod 9 are inclined upward in the same direction. The first inclined rod 8 and the second inclined rod 9 cooperate to clamp the sample to be tested at a certain angle, thereby improving the stability of the sample to be tested. The cross-section of the slot 10 is V-shaped. The slot 10 can clamp and fix thin sample, such as PCB circuit board, through its function.

[0031] The mounting base 1 has three knobs 101 arranged in a triangle. The knobs 101 are rotatably connected to the mounting base 1. A steel ball 102 is embedded and fixed at the top of the knob 101 and a strip groove is opened at the bottom. In this embodiment, the knob 101 is threadedly connected to the mounting base 1. The strip groove allows the operator to rotate the knob 101 with tools such as screwdrivers. Rotating the knob 101 can adjust the height of the steel ball 102.

[0032] The bottom of the disc 2 has three elliptical grooves 201 arranged in a triangular pattern, corresponding to the knob 101. The steel ball 102 is located within the elliptical grooves 201. The extended line of the major axis of each elliptical groove 201 intersects the central axis of the disc 2. In this embodiment, the steel ball 102 cooperates with the elliptical grooves 201, and both are triangularly distributed, which ensures that the disc 2 can be stably placed on the top of the mounting base 1, improving the stability of the sample being tested, ensuring high precision and reliability during cone-beam CT scanning, and improving the imaging quality of cone-beam CT scanning.

[0033] The movable component includes a fixed plate 4 and wheel-shaped sliders 5 spaced apart at the bottom of the fixed plate 4. The clamping base plate 7 is bolted to the top of the fixed plate 4, and the wheel-shaped sliders 5 are slidably disposed inside the concave guide rail 3. In this embodiment, there are three wheel-shaped sliders 5 at the bottom of the fixed plate 4. A stud is vertically threaded onto the middle position of each wheel-shaped slider 5, and the upper end of the stud is threaded to the fixed plate 4. The wheel-shaped sliders 5 are fixed to the bottom of the fixed plate 4 by means of the stud. The interaction between the wheel-shaped sliders 5 and the concave guide rail 3 facilitates the adjustment of the distance between the first inclined rod 8 and the second inclined rod 9.

[0034] Two adjacent ones of the wheel-shaped sliders 5 are arranged in a staggered manner. The wheel-shaped sliders 5 are in clearance fit with the concave guide rail 3, and the annular arc grooves of the wheel-shaped sliders 5 match the arc protrusions on the inner side of the concave guide rail 3. In this embodiment, the wheel-shaped slider 5 at the middle position of the bottom of the fixed plate 4 is in sliding fit with one side of the concave guide rail 3, and the other two wheel-shaped sliders 5 are in sliding fit with the other side of the concave guide rail 3. The clearance between the wheel-shaped sliders 5 and the concave guide rail 3 is extremely small, which can not only ensure that the fixed plate 4 drives the clamping bottom plate 7 to slide smoothly, but also effectively prevent the two from shaking due to excessive clearance, affecting the imaging quality of the cone beam CT scanned object sample.

[0035] The lock head 6 has a "convex" shape structure. A threaded column threadedly connected to the fixed plate 4 is fixedly arranged at the end of the lock head 6, and the end of the lock head 6 abuts against the sides of the concave guide rail 3, the fixed plate 4 and the clamping bottom plate 7. In this embodiment, after the first diagonal rod 8 and the second diagonal rod 9 clamp and fix the object sample to be detected, the lock head 6 is rotated, and the end of the lock head 6 is abutted against the concave guide rail 3, the fixed plate 4 and the clamping bottom plate 7, and the fixed plate 4 is locked by using the lock head 6 to prevent the wheel-shaped slider 5 from sliding in the concave guide rail 3, so as to realize the stable clamping of the object sample to be detected.

[0036] The inner side surfaces of the first diagonal rod 8 and the second diagonal rod 9 are parallel to each other. The included angle between the inner side surface of the first diagonal rod 8 and the upper surface of the clamping bottom plate 7 is an acute angle, and the included angle between the inner side surface of the second diagonal rod 9 and the upper surface of the clamping bottom plate 7 is an obtuse angle. The first diagonal rod 8 and the second diagonal rod 9 clamp the object sample to be detected by using their inner side surfaces. The two are accurately assembled to the top of the clamping bottom plate 7 at a fixed angle to form a stable support frame, so as to realize the stable clamping of the object sample to be detected at a certain angle.

[0037] The widths of the first diagonal rod 8 and the second diagonal rod 9 both gradually decrease from bottom to top. The first diagonal rod 8 and the second diagonal rod 9 both have a trapezoidal structure and are both made of acetal resin. The first diagonal rod 8 and the second diagonal rod 9 are both made of acetal resin material, and the first diagonal rod 8 and the second diagonal rod 9 have high hardness, high stability and wear resistance.

[0038] The working principle of the present utility model is as follows: When the thickness of the object sample to be detected by cone beam CT scanning is relatively thick, the inner side surfaces of the first diagonal rod 8 and the second diagonal rod 9 are used to clamp the object sample. When the thickness of the object sample to be detected by cone beam CT scanning is relatively thin, the slotted openings 10 on the inner sides of the first diagonal rod 8 and the second diagonal rod 9 are used to clamp the object sample.

[0039] First, adjust the distance between the two moving parts according to the size of the object sample to be tested. Place the object sample between the two first inclined rods 8 and the second inclined rod 9. Then, move the two moving parts respectively. The wheel-shaped slider 5 of the moving parts slides in the concave guide rail 3. The fixing plates 4 of the two moving parts drive the first inclined rods 8 and the second inclined rod 9 to move through the clamping base plate 7. The first inclined rods 8 and the second inclined rod 9 move closer to each other. When the inner sides of the first inclined rods 8 and the second inclined rod 9 are in close contact with the object sample to be tested, rotate the locking head 6 and press the end of the locking head 6 against the concave guide rail 3, the fixing plate 4 and the clamping base plate 7. The locking head 6 is rigidly locked to the fixing plate 4, and then the stable clamping of the object sample to be tested is completed. Then, the object sample can be scanned and tested by cone-beam CT.

[0040] The embodiments described above are merely preferred embodiments of the utility model and are not intended to limit the scope of the utility model. Therefore, all equivalent changes or modifications made to the technical solutions described in the scope of the utility model patent application should be included within the scope of the utility model patent application.

Claims

1. An adjustable clamp for cone-beam CT scanning, characterized in that, It includes an installation base (1) and a disc (2) arranged on the top of the installation base (1). A concave guide rail (3) is arranged on the top of the disc (2). Two moving parts are slidably arranged on the concave guide rail (3). A lock head (6) for locking the moving parts is arranged on one side of the moving part. Clamping bottom plates (7) are fixedly arranged on the tops of the two moving parts; First inclined rods (8) and second inclined rods (9) are respectively fixedly arranged on the tops of the two clamping bottom plates (7). Grooves (10) are opened on the inner sides of the first inclined rods (8) and the second inclined rods (9). The first inclined rods (8) and the second inclined rods (9) are inclined upward in the same direction.

2. The adjustable clamp for cone-beam CT scanning according to claim 1, characterized in that, Three knobs (101) are arranged on the installation base (1) in a triangular shape. The knobs (101) are rotatably connected to the installation base (1). Steel balls (102) are fixedly embedded on the tops of the knobs (101), and strip-shaped grooves are opened at the bottoms.

3. The adjustable clamp for cone-beam CT scanning according to claim 2, characterized in that, Three elliptical grooves (201) corresponding to the knobs (101) are arranged on the bottom of the disc (2) in a triangular shape. The steel balls (102) are located in the elliptical grooves (201); The extension lines of the long axes of each of the elliptical grooves (201) intersect with the central axis of the disc (2).

4. The adjustable clamp for cone-beam CT scanning according to claim 1, characterized in that, The moving part includes a fixing plate (4) and wheel-shaped sliders (5) arranged at intervals on the bottom of the fixing plate (4). The clamping bottom plate (7) is bolted and fixed on the top of the fixing plate (4). The wheel-shaped sliders (5) are slidably arranged inside the concave guide rail (3).

5. The adjustable clamp for cone-beam CT scanning according to claim 4, characterized in that, Two adjacent wheel-shaped sliders (5) are arranged in a staggered manner. The wheel-shaped sliders (5) are in clearance fit with the concave guide rail (3). The annular arc grooves of the wheel-shaped sliders (5) match with the arc protrusions on the inner side of the concave guide rail (3).

6. The adjustable clamp for cone-beam CT scanning according to claim 5, characterized in that, The lock head (6) is in a "convex" shape structure. A threaded column threadedly connected to the fixing plate (4) is fixedly arranged at the end of the lock head (6). The end of the lock head (6) abuts against the side parts of the concave guide rail (3), the fixing plate (4), and the clamping bottom plate (7).

7. The adjustable clamp for cone-beam CT scanning according to claim 1, characterized in that, The inner side surface of the first inclined rod (8) is parallel to the inner side surface of the second inclined rod (9). The included angle between the inner side surface of the first inclined rod (8) and the upper surface of the clamping bottom plate (7) is an acute angle. The included angle between the inner side surface of the second inclined rod (9) and the upper surface of the clamping bottom plate (7) is an obtuse angle.

8. The adjustable clamp for cone-beam CT scanning according to claim 7, characterized in that, The widths of the first inclined rods (8) and the second inclined rods (9) gradually decrease from bottom to top. The first inclined rods (8) and the second inclined rods (9) are both in a trapezoidal structure and are both made of acetal resin.

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