Bone drill testing equipment

Abstract

The utility model provides bone drill testing equipment which comprises a torque control device used for installing a bone drill and providing torsional force for the bone drill; the test board assembly is used for fixing a test board; the pressurizing device is used for driving the torque control device to move towards the direction of the test plate assembly and providing axial pressure for the bone drill; the torque control device comprises a torque output assembly, a bone drill mounting assembly and a connecting assembly. The torque output assembly is provided with an output shaft; the bone drill installation assembly comprises an installation shaft used for installing a bone drill and a rotary supporting body used for providing support and achieving rotation of the installation shaft. The connecting assembly comprises a first shaft part used for being connected with the mounting shaft in a matched mode and a second shaft part used for being connected with the output shaft in a matched mode, and a deformation joint is formed between the first shaft part and the second shaft part. According to the bone drill testing equipment, accurate axial pressure and torque are provided for bone drill testing, and the problem that testing conditions are not uniform due to manual operation is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a bone drill testing device. Background Art

[0002] Bone drills play an important role in surgery, drilling holes in bones to fix screws, plates or other implants. Before bone drills are put on the market, their performance needs to be tested, especially the axial compressive strength and cutting force, to ensure that they play a better role in actual use.

[0003] Existing bone drill tests mostly use manual testing methods. First, the bone drill is connected to the motor to provide torque for the bone drill; second, the bone drill is brought close to the test board, and the motor is manually pushed to make the bone drill drill a hole in the test board; finally, the wear degree of the drill bit, the time it takes for the drill bit to drill into the test board, and the depth of drilling are observed by the naked eye to judge the drilling efficiency of the drill bit.

[0004] The existing bone drill testing method uses manual testing, so the drilling accuracy is difficult to control, resulting in inconsistent testing conditions. Utility Model Content

[0005] One purpose of the utility model is to improve the drilling accuracy during bone drill testing and to obtain accurate test results.

[0006] The present application provides a bone drill testing device, comprising:

[0007] A torque control device, used for installing a bone drill and providing a torsional force to the bone drill;

[0008] A test board assembly, used for fixing the test board; and

[0009] A pressurizing device drives the torque control device to move toward the test plate assembly to provide axial pressure for the bone drill;

[0010] Among them, the torque control device includes a torque output component, a bone drill mounting component, and a connecting component; the torque output component has an output shaft; the bone drill mounting component includes a mounting shaft for mounting the bone drill and a rotating support body for providing support and realizing the rotation of the mounting shaft; the connecting component includes a first shaft portion for matching with the mounting shaft and a second shaft portion for matching with the output shaft, and a deformation gap is provided between the first shaft portion and the second shaft portion.

[0011] Furthermore, the rotating support body includes a bearing and a bearing frame, the bearing is installed on the bearing frame, a protrusion and a retaining ring groove for installing a retaining ring are provided on the outer wall of the mounting shaft, and the bearing is installed between the protrusion and the retaining ring.

[0012] Furthermore, the number of the bearings is two and they are arranged along the axial direction of the mounting shaft, and a bushing for isolating the two bearings is provided between the two bearings.

[0013] Furthermore, the pressurizing device is a synchronous belt linear module, the synchronous belt linear module includes a sliding seat, and the torque control device is fixed on the sliding seat.

[0014] Furthermore, a displacement sensor is fixed on the side wall of the synchronous belt linear module, a part of the displacement sensor is fixed on the sliding seat, and the other part is fixed on the base of the synchronous belt linear module.

[0015] Furthermore, the test plate assembly includes a base plate and two clamping members arranged on both sides of the base plate, the clamping members include an L-shaped holding portion and a connecting portion, the connecting portion is fixed to the base plate by a fastening assembly, and the holding portion and the base plate are pressed against the bone plate.

[0016] Furthermore, a waist-shaped hole is opened on the connecting portion, and the length direction of the waist-shaped hole is perpendicular to the base plate; the fastening assembly includes a screw rod and a nut arranged on the screw rod, the screw rod is installed on the base plate and inserted into the waist-shaped hole, and the nut is located on the outside of the base plate.

[0017] Furthermore, the bone drill testing device also includes a fixing frame arranged on one side of the pressurizing device, and the testing plate assembly is mounted on the fixing frame.

[0018] Furthermore, an axial pressure sensor is provided on a side of the bottom plate away from the mounting groove.

[0019] The beneficial effects of the utility model are:

[0020] 1. The torque control device and the pressure device provide accurate axial pressure and torque for the bone drill, making the test more accurate and avoiding the problem of inconsistent test conditions caused by manual operation.

[0021] 2. By configuring the connecting component as a first shaft portion and a second shaft portion, and providing a deformation joint between the first shaft portion and the second shaft portion, when the first shaft portion and the second shaft portion are respectively matched with the mounting shaft and the output shaft, due to the existence of the deformation joint, the first shaft portion and the second shaft portion can be relatively offset in the axial direction, thereby solving the problem that the axes of the mounting shaft and the output shaft are not collinear.

[0022] 3. By setting up axial pressure sensors and displacement sensors, accurate data during the bone drill test can be obtained to achieve automated digital testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1A three-dimensional diagram of a bone drill testing device according to an embodiment of the utility model;

[0024] Figure 2 is a cross-sectional view of a torque control device according to an embodiment of the utility model;

[0025] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 A three-dimensional diagram of a test board assembly installed on a fixing frame according to an embodiment of the utility model;

[0027] Figure 5 It is a side view of a base plate according to an embodiment of the utility model.

[0028] In the figure:

[0029] 10-bone drill testing equipment; 2-torque control device; 21-torque output assembly; 211-output shaft; 22-bone drill mounting assembly; 221-mounting shaft; 2211-bump; 2212-circlip groove; 2213-circlip; 222-rotating support body; 2221-bearing; 2222-bearing frame; 2223-bushing; 23-connecting assembly; 231-first shaft portion; 232-second shaft portion; 233-deformation joint; 3-test plate assembly; 31-bottom plate; 311-horizontal through hole; 32-clamping piece; 321-holding portion; 322-connecting portion; 323-waist-shaped hole; 4-displacement sensor; 5-axial pressure sensor; 6-bone plate; 7-bone drill; 8-pressurizing device; 81-sliding seat; 82-base; 9-fixed frame; 11-mounting groove. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is understandable that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] See also Figure 1 The bone drill testing device 10 shown in a preferred embodiment of the utility model includes: a torque control device 2 for installing a bone drill 7 and providing a torsional force to the bone drill 7, a test plate assembly 3 for fixing a bone plate 6, and a pressurizing device 8 for driving the torque control device 2 to move toward the test plate assembly 3 and providing an axial pressure to the bone drill 7 at the same time.

[0032] The working principle of the bone drill testing equipment 10 is roughly as follows: the bone drill 7 is fixed by the torque control device 2 and torque is provided to the bone drill 7. The bone drill 7 moves toward the test plate assembly 3 under the drive of the pressure-applying device 8 and axial pressure is provided to the bone drill 7. The test plate assembly 3 fixes the bone plate 6 to prevent the bone plate 6 from shaking during the test and affecting the test results.

[0033] The torque control device 2 and the pressurizing device 8 provide accurate axial pressure and torque for the bone drill 7, making the test more accurate and avoiding the problem of inconsistent test conditions caused by manual operation. Moreover, under the control of the torque control device 2 and the pressurizing device 8, the axial pressure and torque in the bone drill test can be more accurately controlled, which is conducive to accurately controlling the test conditions and improving the test accuracy.

[0034] The torque control device 2 includes a torque output assembly 21, a bone drill mounting assembly 22, and a connecting assembly 23. In one embodiment, the power source of the torque output assembly 21 is a servo motor, which allows a specific torque value to be input to output a specific magnitude of torsional force. In order to ensure that sufficient torque is provided to the bone drill 7, a planetary reducer can be added to the servo motor. The torque output assembly 21 has an output shaft 211 for outputting the power of the servo motor to the outside.

[0035] The bone drill mounting assembly 22 includes a mounting shaft 221 for mounting the bone drill 7 and a rotating support body 222 for providing support and realizing the rotation of the mounting shaft 221. In one embodiment, one end of the mounting shaft 221 is provided with a mounting interface (not shown) with a regular hexagonal cross section, and the bone drill 7 is inserted into the mounting interface for engagement.

[0036] Please combine Figure 1 and Figure 2 The connecting assembly 23 includes a first shaft portion 231 for matching with the installation shaft 221 and a second shaft portion 232 for matching with the output shaft 211, and a deformation gap 233 is provided between the first shaft portion 231 and the second shaft portion 232. When the first shaft portion 231 and the second shaft portion 232 are matched with the installation shaft 221 and the output shaft 211 respectively, due to the existence of the deformation gap 233, the first shaft portion 231 and the second shaft portion 232 can be relatively offset in the axial direction, thereby solving the problem that the axis of the installation shaft 221 and the axis of the output shaft 211 are not in the same line.

[0037] In this embodiment, the rotating support body 222 includes a bearing 2221 and a bearing frame 2222, and the bearing 2221 is mounted on the bearing frame 2222. The outer wall of the installation shaft 221 is provided with a protrusion 2211 for preventing the installation shaft 221 from axial displacement when rotating at high speed, and a retaining ring groove 2212 for installing a retaining ring 2213. The bearing 2221 is installed between the protrusion 2211 and the retaining ring 2213. By providing the retaining ring 2213, the bearing 2221 is fixed on the installation shaft 221.

[0038] In this embodiment, two bearings 2221 are arranged along the axial direction of the installation shaft 221 to better support the installation shaft 221. A bushing 2223 is provided between the two bearings 2221 to isolate the two bearings 2221 and prevent wear between the bearings 2221.

[0039] In order to ensure more accurate control of the magnitude of the axial pressure applied to the bone drill 7, the pressure device 8 is a synchronous belt linear module, which adopts the existing technology and is not described in detail here. The synchronous belt linear module includes a sliding seat 81, and the torque control device 2 is fixed on the sliding seat 81. The sliding seat 81 moves along the axial direction of the synchronous belt linear module to drive the torque control device 2 to move.

[0040] A displacement sensor 4 is fixed on the side wall of the synchronous belt linear module. One part of the displacement sensor 4 is fixed on the sliding seat 81, and the other part is fixed on the base 82 of the synchronous belt linear module. The type of the displacement sensor 4 can be a magnetic wire displacement sensor 4 to increase the stroke of the displacement sensor 4 and avoid limiting the test environment due to the limitation of the stroke of the displacement sensor 4. The displacement sensor 4 can obtain the data of the drilling depth of the bone drill 7 on the bone plate 6.

[0041] Please combine Figure 4 and Figure 5 The test plate assembly 3 includes a bottom plate 31 and two clamping members 32 disposed opposite to each other on both sides of the bottom plate 31. The clamping members 32 and the bottom plate 31 define a mounting groove 11 for mounting the bone plate 6.

[0042] The clamping member 32 includes an L-shaped holding portion 321 and a connecting portion 322. The connecting portion 322 is fixed to the bottom plate 31 through a fastening assembly (not shown), and the holding portion 321 and the bottom plate 31 press against the bone plate 6.

[0043] In one embodiment, the fastening assembly includes a screw and a nut disposed on the screw. A waist-shaped hole 323 is provided on the connecting portion 322, and the length direction of the waist-shaped hole 323 is perpendicular to the bottom plate 31. The screw is installed on the bottom plate 31 and inserted into the waist-shaped hole 323, and the nut is located on the outside of the bottom plate 31. In this embodiment, a horizontal through hole 311 is formed on the bottom plate 31, which passes through both sides of the bottom plate 31, and the screw is inserted into the horizontal through hole 311, and both ends of the screw protrude from the horizontal through hole 311.

[0044] The assembly method of the test plate assembly 3 is as follows: the nut is loosened, and the clamping member 32 can move relative to the bottom plate 31 along the length direction of the waist-shaped hole 323 under the cooperation of the waist-shaped hole 323 and the screw rod, so that the width of the installation groove 11 becomes larger, and then the bone plate 6 is placed into the installation groove 11. At this time, the clamping member 32 is moved again to narrow the width of the installation groove 11, so that the holding portion 321 and the bottom plate 31 press and fix the bone plate 6, and finally, the nut is tightened. In other embodiments, a threaded hole (not shown) can also be directly formed on the side wall of the bottom plate 31, and the fastening assembly can be a bolt or a screw.

[0045] In this embodiment, the bone drill testing device 10 further includes a fixing frame 9 disposed on one side of the pressurizing device 8, and the test plate assembly 3 is mounted on the fixing frame 9 to support the test plate assembly 3 to reach the testing position of the bone drill 7. In this embodiment, an axial pressure sensor 5 is disposed on the side of the bottom plate 31 away from the mounting groove 11, and the axial pressure on the bone drill 7 is obtained through the axial pressure sensor 5 to provide accurate experimental data for the test.

[0046] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A bone drill testing device, characterized in that: include: A torque control device, used for installing a bone drill and providing a torsional force to the bone drill; A test board assembly, used for fixing the test board; as well as A pressurizing device drives the torque control device to move toward the test plate assembly to provide axial pressure for the bone drill; Among them, the torque control device includes a torque output component, a bone drill mounting component, and a connecting component; the torque output component has an output shaft; the bone drill mounting component includes a mounting shaft for mounting the bone drill and a rotating support body for providing support and realizing the rotation of the mounting shaft; the connecting component includes a first shaft portion for matching with the mounting shaft and a second shaft portion for matching with the output shaft, and a deformation gap is provided between the first shaft portion and the second shaft portion.

2. The bone drill testing device according to claim 1, characterized in that: The rotating support body comprises a bearing and a bearing frame, the bearing is mounted on the bearing frame, a convex block and a retaining ring groove for mounting a retaining ring are provided on the outer wall of the mounting shaft, and the bearing is mounted between the convex block and the retaining ring.

3. The bone drill testing device according to claim 2, characterized in that: The number of the bearings is two and they are arranged along the axial direction of the mounting shaft, and a bushing for isolating the two bearings is provided between the two bearings.

4. The bone drill testing device according to claim 1, characterized in that: The pressurizing device is a synchronous belt linear module, the synchronous belt linear module includes a sliding seat, and the torque control device is fixed on the sliding seat.

5. The bone drill testing device according to claim 4, characterized in that: A displacement sensor is fixed on the side wall of the synchronous belt linear module, a part of the displacement sensor is fixed on the sliding seat, and the other part is fixed on the base of the synchronous belt linear module.

6. The bone drill testing device according to claim 1, characterized in that: The test plate assembly includes a base plate and two clamping members arranged on both sides of the base plate. The clamping members include an L-shaped holding portion and a connecting portion. The connecting portion is fixed to the base plate by a fastening assembly. The holding portion and the base plate press the bone plate relative to each other.

7. The bone drill testing device according to claim 6, characterized in that: A waist-shaped hole is provided on the connecting portion, and the length direction of the waist-shaped hole is perpendicular to the base plate; the fastening assembly includes a screw rod and a nut arranged on the screw rod, the screw rod is installed on the base plate and inserted into the waist-shaped hole, and the nut is located on the outside of the base plate.

8. The bone drill testing device according to claim 7, characterized in that: The bone drill testing device further comprises a fixing frame arranged at one side of the pressurizing device, and the testing plate assembly is mounted on the fixing frame.

9. The bone drill testing device according to claim 8, characterized in that: An axial pressure sensor is arranged on a side of the bottom plate away from the mounting groove.

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