Clamping device for detecting transmission precision of shaft speed reducer

Abstract

The utility model discloses a clamping device for detecting the transmission precision of a shaft reducer. The clamping device comprises a clamping rod and a locking sleeve, the clamping rod is composed of a clamping jaw, a threaded rod and a connecting rod which are sequentially and coaxially arranged. The multi-petal type clamping jaws are evenly distributed around the axis, and elastic open grooves extending in the axial direction are reserved in the multi-petal type clamping jaws. The front end of the clamping jaw is open, a clamping cavity is formed in the clamping jaw and matched with the end of a speed reducer rotating shaft in shape, the outer contour of the clamping jaw forms a conical guide section from front to back, the locking sleeve is of a sleeve structure, the front section of the sleeve is provided with a conical guide sleeve matched with the conical guide section in shape, and the rear section of the sleeve is provided with internal threads. The locking sleeve is screwed with the threaded rod of the clamping rod through the internal thread; and the conical guide sleeve and the conical guide section are extruded or loosened. According to the utility model, the multi-petal clamping jaw and the locking sleeve are matched with the conical guide section and the conical guide sleeve, so that a gap generated by original spline meshing or flat key matching is effectively eliminated, the transmission precision is improved, and the accuracy of a detection result is ensured. The structure is simple, and operation is convenient.

Description

Technical Field

[0001] This utility model pertains to testing auxiliary devices, specifically a clamping device for testing the transmission accuracy of shaft reducers. Background Technology

[0002] The machining industry is a fundamental sector in modern manufacturing and a cornerstone of modern production. Within the machining industry, the processing of speed reducers constitutes a significant portion. In modern manufacturing, the application of gear reducers is becoming increasingly widespread, while the requirements for manufacturing precision and other aspects are also rising, driving continuous updates and improvements in production processes. After assembly, speed reducers undergo various tests to assess relevant parameters and determine whether they meet design requirements.

[0003] When testing shaft-type reducers, the input and output ends of the reducer need to be coaxially connected to an external testing device. Currently, the input and output ends of reducers are mostly splined shafts or smooth keyway shafts. With the existing connection method between the testing device and the reducer shaft, whether splined or keyed, there is a clearance, which will affect the transmission accuracy test results. Therefore, it is necessary to optimize the shaft connection method between the testing equipment and the reducer. Summary of the Invention

[0004] In view of this, the present invention provides a clamping device for detecting the transmission accuracy of shaft-type reducers, eliminating the gap between the external testing equipment and the reducer shaft, improving transmission accuracy, and thus obtaining accurate detection. It also features a simple structure and convenient operation.

[0005] The technical solution adopted by this utility model is: a clamping device for detecting the transmission accuracy of shaft reducers, comprising a clamping component and a locking component, characterized in that: the clamping component is a clamping rod and the locking component is a locking sleeve;

[0006] The clamping rod consists of a jaw, a threaded rod, and a connecting rod arranged coaxially in sequence; the jaw has a multi-lobed structure, with each jaw lobe evenly distributed around the axis of the clamping rod; each jaw lobe has an axially extending elastic opening groove between it; the front end of the jaw forms a circular opening, and the inside of the jaw forms a clamping cavity, which is adapted to the end shape of the reducer shaft; the outer contour of the jaw gradually tapers from front to back to form a tapered guide section.

[0007] The locking sleeve is a sleeve structure. The front section of the sleeve is provided with a tapered guide sleeve that matches the shape of the tapered guide section, and the rear section of the sleeve is provided with an internal thread. The locking sleeve is screwed to the threaded rod of the clamping rod through the internal thread. The tapered guide sleeve moves axially along the threaded rod and forms a squeezing or loosening relationship with the tapered guide section of the chuck.

[0008] Furthermore, the inner surface of the clamping cavity of the chuck is provided with anti-slip teeth or keyways adapted to the end of the reducer shaft, so as to form an anti-rotation fit with the end of the reducer shaft.

[0009] Furthermore, the number of lobes of the claw is 3 or 4, and the number of elastic opening slots is consistent with the number of lobes of the multi-lobed claw.

[0010] Furthermore, the outer surface of the locking sleeve is provided with knurling or a hexagonal surface for manual or tool-driven rotation.

[0011] Furthermore, a relief groove is left between the threaded rod of the clamping rod and the tapered guide section.

[0012] Furthermore, the connecting rod of the clamp is coaxially connected to an external testing device via a coupling.

[0013] The beneficial effects of this invention are as follows: By using multi-lobed jaws and locking sleeves, along with tapered guide sections and tapered guide sleeves, a reliable clamping device is added between the testing equipment and the reducer shaft. This effectively eliminates the gaps caused by the original spline meshing or flat key fit, improves transmission accuracy, and ensures the precision of the testing results. The entire clamping device has a simple structure, and the clamping operation of the reducer shaft is very convenient. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model connected to the reducer shaft;

[0015] Figure 2 This is a schematic diagram of an embodiment of the present invention;

[0016] Figure 3 yes Figure 2 Schematic diagram of the middle clamp rod;

[0017] Figure 4 yes Figure 3 The right view;

[0018] Figure 5 This is a schematic diagram of another embodiment of the present invention;

[0019] Figure 6 yes Figure 5 Schematic diagram of the middle clamp rod;

[0020] Figure 7 yes Figure 6 The left view;

[0021] Figure 8 This is a schematic diagram of the locking sleeve structure;

[0022] Figure 9This is a schematic diagram of the structure of this utility model connected with the reducer and external testing device.

[0023] In the diagram: 1. Clamping rod, 2. Locking sleeve, 3. Reducer, 4. Input end, 5. Output end, 6. Claw, 7. Tapered guide section, 8. Threaded rod, 9. Connecting rod, 10. Elastic opening groove, 11. Tool relief groove, 12. Clamping cavity, 13. Tapered guide sleeve, 14. Internal thread, 15. Bracket, 16. Mounting hole, 17. Flange, 18. Coupling, 19. Motor, 20. Sensor. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1 to 9 As shown, a clamping device for detecting the transmission accuracy of a shaft-type reducer 3 includes a clamping component and a locking component. The clamping component is a clamping rod 1, and the locking component is a locking sleeve 2.

[0026] The clamping rod 1 consists of a jaw 6, a threaded rod 8, and a connecting rod 9 arranged coaxially in sequence. The jaw 6 has a multi-lobed structure, with each jaw 6 evenly distributed around the axis of the clamping rod 1. An axially extending elastic opening groove 10 is provided between each jaw 6 to provide deformation space for clamping. In this invention, the jaw 6 has 3 or 4 lobes, and the number of elastic opening grooves 10 is consistent with the number of lobes in the multi-lobed jaw 6. The front end of the jaw 6 forms a circular opening. The interior of the jaw 6 forms a clamping cavity 12 adapted to the shape of the input end 4 or output end 5 of the reducer 3 shaft. The inner surface of the clamping cavity 12 of the jaw 6 is provided with anti-slip teeth or keyways adapted to the input end 4 or output end 5, for forming an anti-rotation fit with the input end 4 or output end 5 of the reducer 3 shaft. The outer contour of the jaw 6 gradually tapers from front to back to form a tapered guide section 7.

[0027] The rear end of the retracted jaw 6 is coaxially provided with a threaded rod 8, and a relief groove 11 is left between the rear end of the jaw 6 and the threaded rod 8. The rear end of the threaded rod 8 is coaxially provided with a connecting rod 9, which is coaxially connected to an external testing device through a coupling 18. The jaws 6, which are evenly distributed around the axis, and the coaxially connected jaws 6, threaded rod 8, and connecting rod 9 are all designed to achieve coaxial clamping and coaxial rotation with the rotating shaft of the reducer 3, ensuring the accuracy of the test.

[0028] like Figures 1 to 8As shown, the locking sleeve 2 is a sleeve structure. The front section of the sleeve has a tapered guide sleeve 13 that matches the shape of the tapered guide section 7, and the rear section of the sleeve has an internal thread 14. The outer surface of the locking sleeve 2 has knurling or a hexagonal surface for manual or tool-driven rotation. The locking sleeve 2 is screwed onto the threaded rod 8 of the clamping rod 1 via the internal thread 14, and the tapered guide sleeve 13 is clearance-fitted with the outer contour of the tapered guide section 7 of the jaw 6. By rotating the locking sleeve 2, axial displacement is generated on the clamping rod 1, thereby achieving the opening and loosening or opening and clamping of the multi-lobed jaw 6.

[0029] from Figure 1 As can be seen, the outer shell shapes of the input end 4 and the output end 5 of the reducer 3 are different. In view of this situation, the shape of the clamping rod 1 has been adapted.

[0030] Example 1

[0031] like Figures 2 to 4 As shown, the outer contour of the front end of the chuck 6 gradually transitions from the front end of the tapered guide section 7 to the opening. This chuck 6 clamps the rotating shaft that is fully extended from the housing of the reducer 3.

[0032] Example 2

[0033] like Figure 5 and Figure 7 As shown, the outer contour of the front end of the chuck 6 is cylindrical, and its outer diameter is smaller than the outer diameter of the front end of the tapered guide section 7. Such a chuck 6 is suitable for clamping situations where it needs to partially extend into the housing of the reducer 3 to fully clamp the rotating shaft.

[0034] like Figure 9 As shown, when the external testing equipment performs testing on the reducer 3, the reducer 3 needs to be fixed. Therefore, the housing of the reducer 3 is fixed to the bracket 15. The bracket 15 includes a horizontal bottom surface and a vertical front surface, with the bottom surface fixedly connected to the worktable of the machine tool. The front surface has a mounting hole 16 for fixing the housing of the reducer 3. The axis of rotation of the reducer 3 coincides with the axis of the mounting hole 16.

[0035] To facilitate the fixing of reducers 3 with different housing sizes, a flange 17 is used to connect and fix the reducer 3 to the facade. The housing of the reducer 3 is first fixedly connected to the flange 17, and then the flange 17 is fixed to the mounting hole 16 of the bracket 15. The axes of the reducer 3, the flange 17, and the mounting hole 16 on the facade are coincident.

[0036] External testing equipment, such as motor 19 and sensor 20, needs to be connected to the input end 4 and output end 5 of reducer 3 respectively. Therefore, the input end 4 and output end 5 of reducer 3 are coaxially connected to the external testing equipment through clamping devices. The jaws 6 of clamping rod 1 in the clamping device are connected to the input end 4 and output end 5 of the reducer 3 shaft, and the connecting rod 9 of clamping rod 1 in the clamping device is connected to the external motor 19 or sensor 20 through coupling 18.

[0037] In use, this invention first rotates the locking sleeve 2, causing axial displacement on the threaded rod 8 of the clamping rod 1. The tapered guide sleeve 13 in the locking sleeve 2 separates from the tapered guide section 7 on the clamping rod 1, thus releasing the jaws 6 on the clamping rod 1. Then, the clamping cavity 12 of the jaws 6 is clamped onto the corresponding input end 4 or output end 5 of the reducer 3. Next, the locking sleeve 2 is rotated in the opposite direction, causing axial displacement on the threaded rod 8 of the clamping rod 1 in the opposite direction. The tapered guide sleeve 13 in the locking sleeve 2 presses against the tapered guide section 7 on the clamping rod 1, thus causing the jaws 6 on the clamping rod 1 to firmly clamp the input end 4 or output end 5 of the reducer 3. This clamping effect effectively eliminates the gaps caused by the original spline meshing or flat key fit. Finally, the connecting rod 9 of the clamping rod 1 is coaxially connected to the external testing equipment via a coupling 18, thereby achieving reliable transmission for testing.

[0038] The multi-lobed jaws 6 and locking sleeve 2 designed in this invention, together with the tapered guide section 7 and tapered guide sleeve 13, provide a reliable clamping device between the testing equipment and the reducer 3 shaft. This effectively eliminates the gaps caused by the original spline meshing or flat key fit, improves transmission accuracy, and ensures the precision of the testing results. The entire clamping device has a simple structure, and the clamping operation of the reducer 3 shaft is also very convenient.

Claims

1. A clamping device for detecting the transmission precision of an axle type speed reducer, comprising a clamping component and a locking component, characterized in that: The clamping component is a clamping rod (1), and the locking component is a locking sleeve (2). The clamping rod (1) is composed of a jaw (6), a threaded rod (8), and a connecting rod (9) arranged coaxially in sequence; the jaw (6) is a multi-lobed structure, with each jaw (6) evenly distributed around the axis of the clamping rod (1); there is an axially extending elastic opening groove (10) between each jaw (6); the front end of the jaw (6) forms a circular opening, and the inside of the jaw (6) forms a clamping cavity (12), which is adapted to the end shape of the reducer (3) shaft; the outer contour of the jaw (6) gradually narrows from front to back to form a conical guide section (7). The locking sleeve (2) is a sleeve structure. The front section of the sleeve is provided with a tapered guide sleeve (13) that matches the shape of the tapered guide section (7), and the rear section of the sleeve is provided with an internal thread (14). The locking sleeve (2) is screwed to the threaded rod (8) of the clamping rod (1) through the internal thread (14). The tapered guide sleeve (13) moves axially along the threaded rod (8) and forms a squeezing or loosening relationship with the tapered guide section (7) of the pawl (6).

2. The clamping device for detecting the transmission precision of an axle type speed reducer according to claim 1, characterized in that: The inner surface of the clamping cavity (12) of the claw (6) is provided with anti-slip teeth or keyways adapted to the end of the reducer (3) shaft, which are used to form an anti-rotation fit with the end of the reducer (3) shaft.

3. The clamping device for detecting the transmission precision of an axle type speed reducer according to claim 1, characterized in that: The number of lobes of the claw (6) is 3 or 4, and the number of elastic opening grooves (10) is the same as the number of lobes of the multi-lobed claw (6).

4. The clamping device for detecting the transmission precision of an axle type speed reducer according to claim 1, characterized in that: The outer contour of the front end of the claw (6) gradually transitions from the front end of the tapered guide section (7) to the opening.

5. The clamping device for detecting the transmission precision of an axle type speed reducer according to claim 1, characterized in that: The outer contour of the front end of the claw (6) is cylindrical, and its outer diameter is smaller than the outer diameter of the front end of the tapered guide section (7).

6. The clamping device for detecting the transmission precision of an axle type speed reducer according to claim 1, characterized in that: The outer surface of the locking sleeve (2) is provided with knurling or hexagonal surface for manual or tool-driven rotation.

7. The clamping device for detecting the transmission precision of an axle type speed reducer according to claim 1, characterized in that: A relief groove (11) is left between the threaded rod (8) of the clamping rod (1) and the tapered guide section (7).

8. The clamping device for detecting the transmission precision of an axle type speed reducer according to claim 1, characterized in that: The connecting rod (9) of the clamp (1) is coaxially connected to the external testing equipment via a coupling (18).

Images