Device for testing torsional property of snake bone

Abstract

The utility model discloses a snake bone torsion resistance testing device, which comprises a box body, a locking device and a torsion meter, the box body is internally provided with a bending cavity, one side of the box body is provided with a connecting part, the connecting part is internally provided with an annular groove for accommodating a bearing, the locking device is arranged in the connecting part and is rotatably connected with the box body through the bearing, and the torsion meter is arranged in the box body. The locking device is connected with the torsion meter; the bending cavity is provided with an arc-shaped inner wall and a connecting opening communicated with an inner cavity of the connecting part, one end of the snake bone penetrates through the connecting opening to be connected with the locking device, and the other end of the snake bone is attached to the arc-shaped inner wall to be bent and deformed. According to the utility model, the bending cavity is arranged inside the box body, so that the snake bone is naturally bent along the arc-shaped inner wall of the bending cavity, the bending angle can be changed only by adjusting the length of the snake bone extending into the bending cavity, complicated mechanical structure adjustment is not needed, the operation is simple and rapid, and the consistency of test angles of products in the same batch can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of snake bone testing technology, and in particular to a snake bone torsional resistance testing device. Background Technology

[0002] The snake bone is the core component of the endoscope. It bends at the front end of the endoscope, allowing it to move flexibly inside the human body and deliver surgical instruments to the designated location.

[0003] Snake bones need to bend to conform to the shape of the orifices inside the human body. To prevent snake bones from bending and breaking, their torsional resistance is crucial. Therefore, snake bones often need to undergo torsional resistance tests at the factory.

[0004] Traditional snake bone torsional resistance testing devices all use moving mechanical structures to bend the snake bone. For example, in patent number CN202411382848, the snake bone is bent by pulling the end of the snake bone with two wires. Another example is patent number CN202123447520, which adjusts the bending angle of the snake bone by adjusting the angle adjustment seat. These devices have relatively complex structures and require manual adjustment of the wires or angle adjustment seat to change the bending angle. This results in low operating efficiency, difficulty in accurately adjusting to a fixed angle, and difficulty in ensuring the consistency of the test angle for different products in the same batch. As a result, the test accuracy is reduced and the product defect rate is increased. Utility Model Content

[0005] To address the technical problems of existing snake-bone torsional performance testing devices being complex in structure, difficult to adjust the snake-bone angle, and unable to ensure consistency of testing conditions for different products, thus reducing testing accuracy, this utility model provides a snake-bone torsional performance testing device to solve the above problems.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a snake bone anti-torsion performance testing device, including a box, a locking device and a torque meter. The box has a bending cavity inside, and a connecting part on one side of the box. The connecting part has an annular groove for accommodating a bearing. The locking device is placed in the connecting part and is rotatably connected to the box through the bearing. The locking device is connected to the torque meter. The bending cavity has an arc-shaped inner wall and a connecting port communicating with the inner cavity of the connecting part. One end of the snake bone passes through the connecting port and is connected to the locking device, and the other end is bent and deformed against the arc-shaped inner wall.

[0007] In an optional embodiment of this utility model, the box body may be partially or entirely made of transparent material.

[0008] In an optional embodiment of this utility model, the box body includes a base and a top cover, and the opposite surfaces of the base and the top cover are provided with grooves, and the two grooves form a bending cavity.

[0009] In an optional embodiment of this utility model, the top cover is made of a transparent material.

[0010] In an optional embodiment of this utility model, the depth h of the bending cavity and the outer diameter d of the snake bone satisfy the following condition: h = d ~ 1.3d.

[0011] In an optional embodiment of this utility model, one or more connecting parts are provided, and the bending cavity is provided in a one-to-one correspondence with the connecting part.

[0012] In an optional embodiment of this utility model, each bending cavity is symmetrically provided with two arc-shaped inner walls, and the connection port is located on the axis of symmetry of the two arc-shaped inner walls.

[0013] In an optional embodiment of this utility model, the locking device includes a stud, a connecting tube, and a locking nut. The locking nut is threadedly engaged with one end of the stud. The connecting tube is located inside the locking nut and is axially limited by the locking nut and the stud. The bearing is connected to the outer surface of the stud. The serpentine tube is inserted into the connecting tube. The connecting tube is made of a deformable material.

[0014] In an optional embodiment of this utility model, the outer surface of the stud is a prismatic surface, the end of the torque meter has a prismatic boss, the stud and the torque meter are connected by an adapter, one end of the adapter has a first mating hole that mates with the stud, and the other end has a second mating hole that mates with the prismatic boss.

[0015] In an optional embodiment of this utility model, the end of the locking nut facing the snake bone is tapered.

[0016] The beneficial effects of this utility model are:

[0017] (1) This utility model sets a bending cavity inside the box, so that the snake bone bends naturally along the arc-shaped inner wall of the bending cavity. Only the length of the snake bone extending into the bending cavity needs to be adjusted to change the bending angle. There is no need to make complex mechanical structure adjustments. The operation is simple and quick, and the consistency of the test angle of the same batch of products can be guaranteed.

[0018] (2) The locking device in this utility model uses a deformable connecting tube to clamp the end of the snake bone, and tightens or releases the connecting tube through the cooperation of the locking nut and the stud. The structure is simple and will not damage the surface of the snake bone. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is an exploded view of a specific embodiment of the snake bone torsional resistance testing device described in this utility model;

[0021] Figure 2 This is a top view (internal structure visible) of a specific embodiment of the snake bone torsional resistance testing device described in this utility model.

[0022] Figure 3 This is a perspective view of the locking device in this utility model;

[0023] Figure 4 This is a schematic diagram of the assembly of the locking device and the snake bone of this utility model;

[0024] Figure 5 This is a perspective view of the adapter of this utility model.

[0025] In the diagram, 1. Box body, 101. Base, 102. Top cover, 2. Locking device, 201. Stud, 202. Connecting pipe, 203. Locking nut, 3. Torque meter, 4. Bending cavity, 401. Arc-shaped inner wall, 5. Connecting part, 6. Bearing, 7. Annular groove, 8. Connecting port, 9. Groove, 10. Prismatic surface, 11. Prismatic boss, 12. Adapter, 1201. First mating hole, 1202. Second mating hole, 13. Snake bone. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] Example 1

[0028] like Figures 1-3 As shown, a snake bone torsional resistance testing device includes a housing 1, a locking device 2, and a torque meter 3. The housing 1 has a bending cavity 4 inside, and a connecting part 5 on one side of the housing 1. The connecting part 5 has an annular groove 7 for accommodating a bearing 6. The locking device 2 is placed in the connecting part 5 and is rotatably connected to the housing 1 through the bearing 6. The locking device 2 is used to fix the end of the snake bone 13 and is connected to the torque meter 3 to transmit the torque of the torque meter 3 to the snake bone 13. The bending cavity 4 has an arc-shaped inner wall 401 and a connecting port 8 communicating with the inner cavity of the connecting part 5. One end of the snake bone 13 passes through the connecting port 8 and is connected to the locking device 2, while the other end is bent and deformed against the arc-shaped inner wall 401.

[0029] The bending cavity 4 inside the box 1 allows the snake bone 13 to bend freely without needing to pull it. The bending angle of the snake bone 13 can be adjusted by changing the length of the snake bone 13 inserted into the bending cavity 4. Full insertion achieves the maximum bending angle. The diameter of the arc-shaped inner wall 401 of the bending cavity 4 determines the bending radius of the snake bone 13. If different bending radii need to be tested, box 1s with different diameters of the arc-shaped inner wall 401 can be selected. The connecting part 5 supports the locking device 2, and the annular groove 7 can fix the axial direction of the bearing 6, thereby fixing the axial position of the locking device 2 and preventing the snake bone 13 from shifting during testing.

[0030] The depth of the bending cavity 4 needs to ensure that the snake bone 13 can twist in the bent state, that is, there is a certain space for the snake bone 13 to move within the bending cavity 4. In the preferred embodiment, the depth h of the bending cavity 4 and the outer diameter d of the snake bone 13 satisfy the following condition: h = d ~ 1.3d.

[0031] The box body 1 is preferably partially or entirely made of transparent material. This allows for easy observation of the torsion of the snake bone 13 inside the bending cavity 4, real-time monitoring of whether the snake bone 13 breaks, and recording the maximum torque of the snake bone 13 when the torque meter 3 is rotated to observe the twisting and breaking of the snake bone 13.

[0032] For ease of installation, box 1 adopts a split structure, such as... Figure 1 As shown, the box body 1 includes a base 101 and a top cover 102. The base 101 and the top cover 102 have corresponding grooves 9 on their opposite sides, and the two grooves 9 form a bending cavity 4. The base 101 can be made of ordinary plastic, and the top cover 102 can be made of transparent plastic. The base 101 and the top cover 102 can be fixed with bolts.

[0033] Locking device 2:

[0034] Locking device 2 includes stud 201, connecting pipe 202, and locking nut 203, such as Figure 4 As shown, one end of the stud 201 is provided with an external thread. The locking nut 203 is threadedly engaged with the stud 201. The connecting tube 202 is located inside the locking nut 203 and is axially limited by the locking nut 203 and the stud 201. The snake bone 13 is inserted into the connecting tube 202. The connecting tube 202 is made of a deformable material. When it is necessary to insert or remove the snake bone 13, the locking nut 203 is loosened, the opening of the connecting tube 202 opens, and the snake bone 13 can move. When it is necessary to fix the snake bone 13, the locking nut 203 is tightened, the opening of the connecting tube 202 closes, and the end of the snake bone 13 is fixed. The connecting tube 202 can be made of plastic material; in this embodiment, the connecting tube 202 is made of brass material.

[0035] The bearing 6 is connected to the outer surface of the stud 201, enabling a rotatable connection between the stud 201 and the housing 1, while simultaneously fixing the stud 201 axially. This embodiment provides two bearings 6, respectively supporting the stud 201 at its front and rear ends. The two bearings 6 are each located within their respective annular grooves 7.

[0036] In a preferred embodiment, the end of the locking nut 203 facing the snake bone 13 is tapered. Since the locking nut 203 is close to the connection port 8, the tapered design can reduce the frictional contact area between the locking nut 203 and the box 1, and also prevent the locking nut 203 from blocking the connection port 8, causing inconvenience in installation.

[0037] The locking device 2 and the torque meter 3 can be fixed by means of bolt connection or welding, as long as the torque meter 3 and the locking device 2 rotate synchronously.

[0038] One or more connecting parts 5 can be set, and the bending cavity 4 is set in a one-to-one correspondence with the connecting part 5. When multiple connecting parts 5 and bending cavities 4 are set, multiple products can be tested at the same time.

[0039] Example 2

[0040] Compared with Embodiment 1, the connection structure between the locking device 2 and the torque meter 3 is different in this embodiment, as described in detail below:

[0041] The outer surface of the stud 201 is a prismatic surface 10, and the end of the torque meter 3 has a prismatic boss 11. The stud 201 and the torque meter 3 are connected by an adapter 12. One end of the adapter 12 has a first mating hole 1201 that mates with the stud 201, and the other end has a second mating hole 1202 that mates with the prismatic boss 11. The holes and the stud are connected by an interference fit.

[0042] In this embodiment, as Figure 1 , Figure 3 and Figure 5 As shown, the outer surface of the stud 201 is a hexagonal prism, and the outer surface of the prism-shaped boss 11 is a quadrangular prism. Therefore, the inner hole of the first mating hole 1201 is hexagonal, and the inner hole of the second mating hole 1202 is square.

[0043] Example 3

[0044] Based on the above embodiment, each bending cavity 4 is symmetrically provided with two arc-shaped inner walls 401, and the connection port 8 is located on the axis of symmetry of the two arc-shaped inner walls 401. After the snake bone 13 extends into the bending cavity 4, it can be bent to the left or right, and the user can choose the bending direction according to the testing requirements.

[0045] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, "a plurality of" means two or more.

[0046] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0047] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A device for testing the torsional resistance of snake bones, characterized in that: The device includes a box body (1), a locking device (2), and a torque meter (3). The box body (1) has a bending cavity (4) inside. The box body (1) has a connecting part (5) on one side. The connecting part (5) has an annular groove (7) for accommodating a bearing (6). The locking device (2) is placed in the connecting part (5) and is rotatably connected to the box body (1) through the bearing (6). The locking device (2) is connected to the torque meter (3). The bending cavity (4) has an arc-shaped inner wall (401) and a connection port (8) communicating with the inner cavity of the connecting part (5). One end of the snake bone (13) passes through the connection port (8) and is connected to the locking device (2), while the other end is bent and deformed in accordance with the arc-shaped inner wall (401).

2. The anti-torsion performance testing device for snake bones according to claim 1, characterized in that: The box body (1) is partially or entirely made of transparent material.

3. The snake bone torsional resistance testing device according to claim 1, characterized in that: The box body (1) includes a base (101) and a top cover (102). The base (101) and the top cover (102) are provided with grooves (9) on opposite sides, and the two grooves (9) form a bending cavity (4).

4. The anti-torsion performance testing device for snake bones according to claim 3, characterized in that: The top cover (102) is made of transparent material.

5. The anti-torsion performance testing device for snake bones according to claim 1, characterized in that: The depth h of the bending cavity (4) and the outer diameter d of the snake bone (13) satisfy the following condition: h = d ~ 1.3d.

6. The anti-torsion performance testing device for snake bones according to claim 1, characterized in that: One or more connecting parts (5) are provided, and the bending cavity (4) is provided in a one-to-one correspondence with the connecting part (5).

7. The snake bone torsional resistance testing device according to claim 1, characterized in that: Each bending cavity (4) is symmetrically provided with two arc-shaped inner walls (401), and the connection port (8) is located on the axis of symmetry of the two arc-shaped inner walls (401).

8. The anti-torsion performance testing device for snake bones according to claim 1, characterized in that: The locking device (2) includes a stud (201), a connecting tube (202), and a locking nut (203). The locking nut (203) is threaded to one end of the stud (201). The connecting tube (202) is located inside the locking nut (203) and is axially limited by the locking nut (203) and the stud (201). The bearing (6) is connected to the outer surface of the stud (201). The snake bone (13) is inserted into the connecting tube (202). The connecting tube (202) is made of a deformable material.

9. The anti-torsion performance testing device for snake bones according to claim 8, characterized in that: The outer surface of the stud (201) is a prismatic surface (10), and the end of the torque meter (3) has a prismatic boss (11). The stud (201) and the torque meter (3) are connected by an adapter (12). One end of the adapter (12) has a first mating hole (1201) that mates with the stud (201), and the other end has a second mating hole (1202) that mates with the prismatic boss (11).

10. The anti-torsion performance testing device for snake bones according to claim 8, characterized in that: The locking nut (203) has a tapered end facing the snake bone (13).

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