Input shaft spline clamp

Abstract

The utility model discloses an input shaft spline clamp which comprises a movable clamp, a fixed clamp and a connecting shaft, the movable clamp is provided with an internal spline used for being connected with an external spline of an input shaft, one end of the fixed clamp is fixedly connected with the connecting shaft, and the other end of the fixed clamp is provided with a through hole matched with the movable clamp. The fixing clamp is provided with a first gap communicated with the through hole, the fixing clamp is provided with a first screw hole matched with a bolt, and the first screw hole is communicated with the first gap. The movable clamp is fastened and nested in the through hole of the fixed clamp through a bolt, the first gap provides an adjusting space for the size of the movable clamp, and the connecting shaft is connected with an equipment telescopic universal joint coupler. When products of different models are tested, only the movable clamp matched with the input shaft needs to be replaced, and the fixed clamp and the connecting shaft can be repeatedly used, so that the clamp replacement time is greatly shortened, the test cost is reduced, and the core problems that a traditional integral clamp is poor in adaptability and low in iteration efficiency are effectively solved.

Description

Technical Field

[0001] This utility model relates to the technical field of steering gear testing devices, specifically to an input shaft spline clamp. Background Technology

[0002] Currently, in the automotive parts manufacturing sector, performance and durability testing of rack and pinion steering assemblies is a core component in ensuring the safety and reliability of vehicle steering systems. The testing process requires precise installation of the steering assembly onto a test bench. A key step involves rigidly fixing the external spline of the input shaft using a spline fixture to simulate the mechanical transmission and load conditions under actual vehicle mounting conditions. However, with the accelerated electrification and intelligent transformation of the automotive industry, OEMs' demand for diversified and customized steering systems has surged, leading to a rapid expansion of companies' product portfolios.

[0003] As the core component for power transmission in steering gears, the input shaft's external spline parameters (such as module, number of teeth, pressure angle, and addendum circle diameter) are frequently adjusted with model iterations, resulting in dozens of differentiated specifications. In traditional testing solutions, fixtures employ an integrated design that perfectly matches the input shaft's external spline. Developing a new spline requires re-measuring data and customizing a dedicated fixture, involving multiple processes such as precision turning, heat treatment, and gear grinding. The manufacturing cycle for a single fixture can be as long as 5-7 working days, and the cost is high. Furthermore, the installation interface of the test bench fixture requires repeated disassembly and reassembly for adaptation, easily introducing assembly errors that affect the coaxiality and stability of the testing system, and even lead to distorted test data. More seriously, when enterprises adopt flexible production models with small batches and multiple varieties, the "one fixture per model" characteristic of traditional fixtures results in low efficiency in test resource scheduling, significantly increases the difficulty of fixture inventory management, and severely slows down the R&D verification pace, becoming a technical bottleneck restricting the rapid market launch of products. How to achieve rapid adaptation and efficient reuse of spline fixtures has become a common problem that the industry urgently needs to overcome. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model proposes an input shaft spline fixture. When testing different product models, only the movable fixture matching the input shaft needs to be replaced, while the fixed fixture and connecting shaft can be reused, significantly shortening fixture change time and reducing testing costs.

[0005] The technical solution adopted by this utility model is as follows: an input shaft spline clamp, including a movable clamp, a fixed clamp and a connecting shaft, wherein the movable clamp is provided with an internal spline for connecting with the external spline of the input shaft, one end of the fixed clamp is fixedly connected to the connecting shaft, the other end of the fixed clamp is provided with a through hole that cooperates with the movable clamp, the fixed clamp is provided with a first gap that communicates with the through hole, and the fixed clamp is provided with a first screw hole that cooperates with a bolt, the first screw hole communicating with the first gap.

[0006] Optionally, the movable clamp is provided with a second gap, which communicates with the internal spline.

[0007] Optionally, the movable clamp has a slot on its outer peripheral wall and a protrusion on its inner peripheral wall that engages with the slot; or the movable clamp has a protrusion on its outer peripheral wall and a slot on its inner peripheral wall that engages with the protrusion.

[0008] Optionally, the cross-sectional shape of the movable clamp is triangular, circular, elliptical, or rectangular, and the cross-sectional shape of the through hole matches the outer contour of the movable clamp.

[0009] Optionally, the fixing clamp includes a fixing clamp, a first connecting part and a second connecting part. One side of the first connecting part is fixedly connected to the fixing clamp, and the other side of the first connecting part is detachably connected to the second connecting part. The second connecting part is fixedly connected to the connecting shaft. The fixing clamp is provided with the through hole and the first gap.

[0010] Optionally, the first connecting part is provided with a plurality of second screw holes along the circumferential direction, and the second connecting part is provided with a plurality of third screw holes along the circumferential direction, with the second screw holes and the third screw holes corresponding to each other and communicating one by one.

[0011] Optionally, the fixing clamp and the first connecting part are integrally formed.

[0012] Optionally, the through hole extends through to the first connecting portion.

[0013] The beneficial effects of this utility model are as follows: the movable fixture is fastened and nested inside the through hole of the fixed fixture by bolts, and the first gap provides adjustment space for the size of the movable fixture. The connecting shaft is connected to the equipment's telescopic universal joint coupling. When testing different models of products, only the movable fixture matching the input shaft needs to be replaced, while the fixed fixture and connecting shaft can be reused, which greatly shortens the fixture replacement time and reduces the testing cost, effectively solving the core problems of poor adaptability and low iteration efficiency of traditional integral fixtures. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the fixing fixture for the input shaft spline clamp proposed in an embodiment of this utility model;

[0015] Figure 2 This is a schematic diagram of the movable fixture of the input shaft spline clamp proposed in an embodiment of the present utility model;

[0016] Figure 3 This is an exploded view of the fixing fixture of the input shaft spline clamp proposed in an embodiment of this utility model.

[0017] The markings in the attached figures are as follows: 1. Movable clamp; 11. Internal spline; 12. Second gap; 13. Slot; 2. Fixed clamp; 21. Fixed clamping part; 211. Through hole; 212. First gap; 213. Slotting protrusion; 214. First screw hole; 22. First connecting part; 221. Second screw hole; 23. Second connecting part; 231. Third screw hole; 3. Connecting shaft. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] like Figures 1 to 3 As shown, this embodiment discloses an input shaft spline clamp, including a movable clamp 1, a fixed clamp 2, and a connecting shaft 3. The movable clamp 1 has an internal spline 11 for connecting with the external spline of the input shaft. One end of the fixed clamp 2 is fixedly connected to the connecting shaft 3, and the other end of the fixed clamp 2 has a through hole 211 that mates with the movable clamp 1. The fixed clamp 2 has a first gap 212 communicating with the through hole 211 and a first screw hole 214 that mates with a bolt, and the first screw hole 214 communicates with the first gap 212. The movable clamp 1 is fastened and nested inside the through hole 211 of the fixed clamp 2 by bolts. The first gap 212 provides adjustment space to accommodate the size of the movable clamp 1. The connecting shaft 3 is connected to a telescopic universal joint coupling of the equipment. When testing different product models, only the movable fixture 1 that matches the input shaft needs to be replaced, while the fixed fixture 2 and the connecting shaft 3 can be reused, which greatly shortens the fixture replacement time and reduces the testing cost, effectively solving the core problems of poor adaptability and low iteration efficiency of traditional integral fixtures.

[0020] like Figure 2 As shown, the movable clamp 1 is provided with a second gap 12, which communicates with the internal spline 11. The second gap 12 provides adjustment space for the movable clamp 1 to adapt to input shafts of different diameters, avoiding the problem of having to frequently replace the movable clamp 1 due to differences in shaft diameter.

[0021] like Figure 1 and 2 As shown, the outer peripheral wall of the movable clamp 1 is provided with a groove 13, and the inner peripheral wall of the through hole 211 is provided with a protrusion 213 that mates with the groove 13; in other embodiments, the outer peripheral wall of the movable clamp 1 may be provided with a protrusion 213, and the inner peripheral wall of the through hole 211 may be provided with a groove 13 that mates with the protrusion 213. The mechanical interlocking structure of the groove 13 and the protrusion 213 prevents the movable clamp 1 from rotating circumferentially within the through hole 211, ensuring the stability of torque transmission between the input shaft and the connecting shaft 3.

[0022] like Figure 1 and 2As shown, the cross-sectional shape of the movable clamp 1 is triangular. In other examples, the cross-sectional shape of the movable clamp can be circular, elliptical, or rectangular. The cross-sectional shape of the through hole 211 matches the outer contour of the movable clamp 1.

[0023] like Figure 3 As shown, the fixing clamp 2 includes a fixing clamp portion 21, a first connecting portion 22, and a second connecting portion 23. One side of the first connecting portion 22 is fixedly connected to the fixing clamp portion 21, and the other side of the first connecting portion 22 is detachably connected to the second connecting portion 23. The second connecting portion 23 is fixedly connected to the connecting shaft 3. The fixing clamp portion 21 is provided with the through hole 211 and the first gap 212. The fixing clamp 2 adopts a split design, dividing it into a fixing clamp portion 21 and a detachable connecting portion. This facilitates the replacement of different specifications of the second connecting portion 23 according to the interface of the testing equipment, while maintaining the versatility of the fixing clamp portion 21 and also facilitating modular processing of the fixing clamp 2.

[0024] like Figure 3 As shown, the first connecting part 22 is provided with a plurality of second screw holes 221 along the circumferential direction, and the second connecting part 23 is provided with a plurality of third screw holes 231 along the circumferential direction. The second screw holes 221 and the third screw holes 231 are connected in a one-to-one correspondence.

[0025] In this embodiment, the fixing clamp 21 and the first connecting part 22 are integrally formed. The fixing clamp 21 and the first connecting part 22 are integrally cast or machined.

[0026] like Figure 3 As shown, the through hole 211 extends through the first connecting portion 22. Increasing the axial installation depth of the movable clamp 1 within the fixed clamp 2 provides a longer guide contact surface, preventing misalignment caused by force eccentricity and improving clamping concentricity.

[0027] It is understood that the specific embodiments described above are merely for explaining the relevant utility model and not for limiting the utility model. It should also be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict with each other. All equivalent structural transformations made based on the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly included within the protection scope of this utility model.

Claims

1. An input shaft spline fixture, characterized in that, The device includes a movable clamp, a fixed clamp, and a connecting shaft. The movable clamp has an internal spline for connecting to the external spline of the input shaft. One end of the fixed clamp is fixedly connected to the connecting shaft, and the other end of the fixed clamp has a through hole that mates with the movable clamp. The fixed clamp has a first gap that communicates with the through hole and a first screw hole that mates with a bolt. The first screw hole communicates with the first gap.

2. The input shaft spline fixture according to claim 1, characterized in that, The movable clamp is provided with a second gap, which is connected to the internal spline.

3. The input shaft spline fixture according to claim 1, characterized in that, The movable clamp has a slot on its outer peripheral wall and a protrusion on its inner peripheral wall that engages with the slot; or the movable clamp has a protrusion on its outer peripheral wall and a slot on its inner peripheral wall that engages with the protrusion.

4. The input shaft spline fixture according to claim 1, characterized in that, The cross-sectional shape of the movable clamp is triangular, circular, elliptical, or rectangular, and the cross-sectional shape of the through hole matches the outer contour of the movable clamp.

5. The input shaft spline fixture according to claim 1, characterized in that, The fixing clamp includes a fixing clamp, a first connecting part and a second connecting part. One side of the first connecting part is fixedly connected to the fixing clamp, and the other side of the first connecting part is detachably connected to the second connecting part. The second connecting part is fixedly connected to the connecting shaft. The fixing clamp is provided with the through hole and the first gap.

6. The input shaft spline fixture according to claim 5, characterized in that, The first connecting part is provided with a plurality of second screw holes along the circumference, and the second connecting part is provided with a plurality of third screw holes along the circumference, with the second screw holes and the third screw holes corresponding to each other and communicating one by one.

7. The input shaft spline fixture according to claim 5, characterized in that, The fixing clamp and the first connecting part are integrally formed.

8. The input shaft spline fixture according to claim 5, characterized in that, The through hole extends through to the first connecting part.

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