Medical bearing testing fixture

Abstract

The utility model relates to a kind of medical bearing test tool in bearing test technical field, including support structure and inner support structure, it has rotating seat, horizontal beam, drive assembly, second adjusting screw and inner support block, rotating seat top surface is evenly spaced ring and is provided with multiple horizontal beams along its radial direction along its circumferential direction, horizontal beam inner end is hingedly connected in rotating seat accordingly;Second adjusting screw is rotatably connected in horizontal beam, the inner support block is slidably connected in horizontal beam and is threadedly cooperated with second adjusting screw, second adjusting screw is rotated by drive assembly drive and moves inner support block to support bearing inner ring outside;The utility model horizontal beam can overturn adjustment: the telescopic equipment of drive assembly and driving rod linkage, horizontal beam is overturned upwards, the diameter of outside contour circle is reduced, the dismounting of different size bearings is facilitated, and the bearing inner ring clamping stroke and inner support structure radius ratio can reach 1:1.2.

Description

Technical Field

[0001] This utility model relates to the field of bearing testing technology, and in particular to a medical bearing testing fixture. Background Technology

[0002] As a critical component in medical devices, the precision and reliability of medical bearings directly impact the performance and safety of these devices. Accurate testing of the drive torque of medical bearings during the manufacturing process is crucial to ensuring their compliance with standards. Existing technologies have proposed various testing fixtures for medical bearings, aiming to measure torque by fixing the inner and outer rings of the bearing and connecting a torque meter. However, these traditional fixtures still have significant shortcomings in terms of universality, ease of operation, and testing accuracy.

[0003] For example, the existing patent with publication number CN 217384519 U discloses a medical bearing drive torque testing fixture, which uses an outer ring fixing mechanism and an inner ring fixing mechanism on multiple drive platforms to clamp the bearing and connects to an external torque tester through a test shaft. Although this solution improves the adaptability to different bearing specifications through adjustable outer ring fixing plates and outer ring telescopic plates, it still has the following drawbacks: First, the outer ring fixing mechanism relies on multiple independently driven motors to control clamping components in different directions, resulting in a complex adjustment process and difficulty in achieving synchronous alignment, which can easily cause bearing installation eccentricity and affect test accuracy; Second, the inner ring fixing rod relies on a screw with a fixed posture for adjustment, and the ratio of clamping stroke to the radius of the inner ring fixing mechanism is limited (maximum only close to 1:2), so the adaptability to different bearing specifications still needs to be improved.

[0004] Therefore, we designed a medical bearing testing fixture. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses a medical bearing testing fixture.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A medical bearing testing fixture includes a support structure and further includes:

[0008] The internal support structure includes a rotating seat, horizontal beams, a drive assembly, a second adjusting screw, and an internal support block. The top surface of the rotating seat is provided with multiple horizontal beams evenly spaced around its circumference and arranged radially. The inner ends of the horizontal beams are correspondingly hinged to the rotating seat. The second adjusting screw is rotatably connected to the horizontal beams. The internal support block is slidably connected to the horizontal beams and threadedly engaged with the second adjusting screw. The drive assembly drives the second adjusting screw to rotate, thereby moving the internal support block to the inner ring of the external support bearing.

[0009] The test shaft, coaxially mounted on the top of the inner support structure, is used to connect an external torque tester to measure the drive torque of the bearing.

[0010] The drive assembly includes a telescopic device and a drive rod. The fixed end of the telescopic device is installed on the support frame on the top of the rotating seat, and its telescopic end is rotatably connected to the horizontal beam through the drive rod. The telescopic device drives the horizontal beam to rotate to adjust the outer diameter of the circle.

[0011] Furthermore, the rotating seat is equipped with a second drive motor, the output shaft of which is connected to a second driving bevel gear, and the inner ends of all the second adjusting screws are equipped with second driven bevel gears that mesh with the second driving bevel gear, so as to realize the synchronous movement of the inner support block;

[0012] The second driven bevel gear is located below the second driving bevel gear to avoid mechanical interference with the second driving bevel gear when the horizontal beam flips.

[0013] Furthermore, the support structure includes a central seat, a plurality of support slide beams evenly spaced around the central seat, a first adjusting screw, and a clamping block. The support slide beams are arranged radially and fixedly connected to the central seat. The first adjusting screw is rotatably connected to the support slide beams. The clamping block is slidably connected to the support slide beams and threadedly engaged with the first adjusting screw. The clamping block is driven to move by rotating the first adjusting screw to clamp the outer ring of the bearing.

[0014] Furthermore, the center seat is equipped with a first drive motor, the output shaft of which is connected to a first active bevel gear. The inner ends of all the first adjusting screws extend into the center seat and are equipped with a first driven bevel gear that meshes with the first active bevel gear, thereby realizing the synchronous centering movement of the clamping block.

[0015] Furthermore, the bottom of the supporting slide beam is provided with a shim to ensure that all supporting slide beams are on the same horizontal plane and to provide installation and maintenance space for the first drive motor.

[0016] Furthermore, the hinge point between the drive rod and the horizontal beam is located at the middle of the horizontal beam.

[0017] Furthermore, the contact surfaces of the clamping block and the inner support block are provided with anti-slip textures to enhance the clamping stability of the bearing.

[0018] Furthermore, the telescopic device is an electric push rod or a cylinder, the stroke of which matches the flip angle of the horizontal beam.

[0019] Furthermore, the number of supporting slide beams and horizontal beams are both 4-6, evenly distributed to achieve symmetrical clamping.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. Adjustable horizontal beam: The horizontal beam can be rotated upward by linking the telescopic device of the drive component with the drive rod, thereby reducing the outer diameter of the outer circle, which facilitates the disassembly and assembly of bearings of different sizes, and makes the ratio of the bearing inner ring clamping stroke to the inner support structure radius reach 1:1.2.

[0022] 2. The first drive motor in the center seat drives the bevel gear set, which drives the clamping blocks on all the support slide beams to move radially synchronously, ensuring that the outer ring of the bearing is evenly stressed and strictly aligned. At the same time, the inner ring is fixed by the second drive motor linked to the bevel gear set, which drives all the inner support blocks to synchronously support the inner ring of the bearing. This eliminates the risk of uneven clamping force, ensures the accuracy of torque testing, completely solves the clamping eccentricity problem of existing technology, and avoids test data deviation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the supporting structure in this utility model;

[0025] Figure 3 This is a cross-sectional view of the support structure in this utility model;

[0026] Figure 4 This is a schematic diagram of the internal support structure in this utility model;

[0027] Figure 5 This is a cross-sectional view of the internal support structure in this utility model;

[0028] Figure 6 This is a schematic diagram of the rotating seat in this utility model.

[0029] In the diagram: 1. Support structure; 11. Center seat; 12. Support slide beam; 13. First adjusting screw; 14. Clamping block; 15. First drive motor; 16. First driving bevel gear; 17. First driven bevel gear; 18. Elevating block; 2. Inner support structure; 21. Rotating seat; 22. Horizontal beam; 23. Drive assembly; 231. Telescopic device; 232. Drive rod; 24. Second adjusting screw; 25. Inner support block; 26. Second drive motor; 27. Second driving bevel gear; 28. Second driven bevel gear; 29. ​​Support frame; 3. Test shaft. Detailed Implementation

[0030] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0031] Example 1, in conjunction with Appendix Figure 1-6 A medical bearing testing fixture includes a support structure 1, an inner support structure 2, and a test shaft 3.

[0032] Combined with appendix Figure 2-3 Support structure 1:

[0033] The center seat 11 is a cylindrical hollow structure, and a first drive motor 15 is fixedly installed at its bottom. The output shaft of the first drive motor 15 extends into the inner cavity of the center seat 11 and is connected to the first drive bevel gear 16.

[0034] There are six supporting slide beams 12, evenly distributed around the center seat 11. Each supporting slide beam 12 is fixed to the radial extension end of the center seat 11 by bolts. The supporting slide beam 12 has a slide rail along its length inside.

[0035] The first adjusting screw 13 is rotatably connected to the slide rail of the supporting slide rail beam 12. One end of the screw extends into the inner cavity of the center seat 11 and is fixed with the first driven bevel gear 17, which meshes with the first driving bevel gear 16.

[0036] The bottom of the clamping block 14 is slidably disposed within the slide rail of the supporting slide beam 12 and is threadedly engaged with the first adjusting screw 13. When the first drive motor 15 is started, the first driving bevel gear 16 drives all the first driven bevel gears 17 to rotate synchronously, driving the clamping block 14 to move radially along the slide rail, thereby achieving synchronous centering and clamping of the outer ring of the bearing.

[0037] The shim block 18 is fixed to the bottom of the support slide beam 12 to ensure that all support slide beams 12 are on the same horizontal plane and to provide installation and maintenance space for the first drive motor 15.

[0038] Combined with appendix Figure 4-6 Internal support structure 2:

[0039] The rotating base 21 is rotatably connected to the top of the central base 11 on the same axis. It is hollow inside and open at the top. The second drive motor 26 is installed inside the rotating base 21, and its output shaft is connected to the second drive bevel gear 27.

[0040] There are four horizontal beams 22, evenly distributed around the circumference of the rotating base 21, with their inner ends connected to the top surface of the rotating base 21 via hinges. A slide rail is provided inside each horizontal beam 22, and a second adjusting screw 24 is rotatably connected within the slide rail. One end of the screw has a second driven bevel gear 28, which meshes with a second driving bevel gear 27. The second driven bevel gear 28 is located below the second driving bevel gear 27 to prevent interference when the horizontal beam 22 is rotated.

[0041] The top of the inner support block 25 is slidably disposed within the slide rail of the horizontal beam 22 and is threadedly engaged with the second adjusting screw 24. When the second drive motor 26 is started, the second driving bevel gear 27 drives all the second driven bevel gears 28 to rotate synchronously, driving the inner support block 25 to move radially along the slide rail, thereby achieving synchronous external support for the inner ring of the bearing.

[0042] The drive assembly 23 includes a telescopic device 231 (such as an electric push rod or cylinder) and a drive rod 232. The fixed end of the telescopic device 231 is mounted on the support frame 29, and the telescopic end is hinged to the middle of the horizontal beam 22 via the drive rod 232. By telescopically extending and retracting the telescopic device 231, the horizontal beam 22 is rotated around the hinge, reducing the outer diameter of the outer circle, which facilitates the disassembly and assembly of bearings of different sizes.

[0043] This configuration allows the ratio of the clamping stroke of the inner support block 25 to the radius of the inner support structure 2 to reach 1:1.2.

[0044] Combined with appendix Figure 1 Test axis 3:

[0045] Test shaft 3 is coaxially fixed to the top of support frame 29 of inner support structure 2 and connected to external torque tester via coupling. After the inner and outer rings of the bearing are clamped and fixed, the external torque tester drives test shaft 3 to rotate the inner ring of the bearing and measures the driving torque in real time.

[0046] Example 2, in conjunction with Appendix Figure 1-3 A medical bearing testing fixture, based on Embodiment 1, is further optimized: the contact surface between the clamping block 14 and the inner support block 25 is set as an arc shape and is provided with anti-slip texture such as cross grid pattern to enhance clamping stability.

[0047] The number of horizontal beams 22 can be adjusted to 6, evenly distributed to improve clamping symmetry.

[0048] It should be noted that there are 4-6 supporting slide beams 12 and 4-6 horizontal beams 22, which are evenly distributed to achieve symmetrical clamping.

[0049] Operating procedures:

[0050] Bearing installation: Start the telescopic device 231 to retract, causing the horizontal beam 22 to flip upward, reducing the outer space of the inner support structure 2, placing the bearing to be tested above the support slide beam 12 of the support structure 1, and start the first drive motor 15 to synchronously move the clamping block 14 to clamp the outer ring of the bearing.

[0051] Inner ring clamping: Start the telescopic device 231 to extend, causing the horizontal beam 22 to flip downward and reset; start the second drive motor 26 to drive the inner support block 25 to synchronously support the outer ring of the bearing to fix the inner ring.

[0052] Torque test: Connect test shaft 3 to an external torque tester, drive the inner ring of the bearing to rotate, and record the torque data.

[0053] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A medical bearing testing fixture, comprising a support structure (1), characterized in that, Also includes: The inner support structure (2) has a rotating seat (21), a horizontal beam (22), a drive assembly (23), a second adjusting screw (24), and an inner support block (25). The top surface of the rotating seat (21) is provided with a plurality of horizontal beams (22) arranged radially along its circumference at uniform intervals. The inner ends of the horizontal beams (22) are correspondingly hinged to the rotating seat (21). The second adjusting screw (24) is rotatably connected to the horizontal beam (22). The inner support block (25) is slidably connected to the horizontal beam (22) and threadedly engaged with the second adjusting screw (24). The drive assembly (23) drives the second adjusting screw (24) to rotate, thereby moving the inner support block (25) to move to the inner ring of the outer support bearing. Test shaft (3) is coaxially set on top of inner support structure (2) for connecting an external torque tester to measure the driving torque of the bearing; The drive assembly (23) includes a telescopic device (231) and a drive rod (232). The fixed end of the telescopic device (231) is installed on the support frame (29) on the top of the rotating seat (21). Its telescopic end is rotatably connected to the horizontal beam (22) through the drive rod (232). The telescopic device (231) drives the horizontal beam (22) to flip to adjust the outer diameter of the circle.

2. The medical bearing testing fixture according to claim 1, characterized in that: The rotating seat (21) is equipped with a second drive motor (26), whose output shaft is connected to a second active bevel gear (27). All the inner ends of the second adjusting screws (24) are equipped with a second driven bevel gear (28) that meshes with the second active bevel gear (27), so as to realize the synchronous movement of the inner support block (25). The second driven bevel gear (28) is located below the second driving bevel gear (27) to avoid mechanical interference with the second driving bevel gear (27) when the horizontal beam (22) flips.

3. The medical bearing testing fixture according to claim 1, characterized in that: The support structure (1) includes a central seat (11), a plurality of support slide beams (12) evenly spaced around the central seat (11), a first adjusting screw (13), and a clamping block (14). The support slide beams (12) are arranged radially and fixedly connected to the central seat (11). The first adjusting screw (13) is rotatably connected to the support slide beams (12). The clamping block (14) is slidably connected to the support slide beams (12) and threadedly engaged with the first adjusting screw (13). The clamping block (14) is driven to move by rotating the first adjusting screw (13) to clamp the outer ring of the bearing.

4. The medical bearing testing fixture according to claim 3, characterized in that: The center seat (11) is equipped with a first drive motor (15), whose output shaft is connected to a first active bevel gear (16). The inner ends of all the first adjusting screws (13) extend into the center seat (11) and are equipped with a first driven bevel gear (17) that meshes with the first active bevel gear (16), so as to realize the synchronous centering movement of the clamping block (14).

5. The medical bearing testing fixture according to claim 3, characterized in that: The bottom of the support slide beam (12) is provided with a shim (18) to ensure that all support slide beams (12) are on the same horizontal plane and to provide installation and maintenance space for the first drive motor (15).

6. The medical bearing testing fixture according to claim 1, characterized in that: The hinge point between the drive rod (232) and the horizontal beam (22) is located in the middle of the horizontal beam (22).

7. The medical bearing testing fixture according to claim 3, characterized in that: The contact surfaces of the clamping block (14) and the inner support block (25) are provided with anti-slip textures to enhance the clamping stability of the bearing.

8. The medical bearing testing fixture according to claim 1, characterized in that: The telescopic device (231) is an electric push rod or cylinder, whose stroke matches the flip angle of the horizontal beam (22).

9. A medical bearing testing fixture according to claim 3, characterized in that: The number of the supporting slide beam (12) and the horizontal beam (22) are both 4-6, evenly distributed to achieve symmetrical clamping.

Images