Coupling assembly tool
By designing a coupling assembly fixture, and utilizing hydraulic circuits to expand the inner hole of the coupling and push it into place, the problems of low installation efficiency and poor precision in existing technologies are solved, achieving safe and reliable coupling installation, reducing costs and improving gearbox quality.
Patent Information
- Application Number
- CN202521445595.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-07-10
AI Technical Summary
In the existing technology, the lack of professional tools during gearbox installation makes the coupling easy to be damaged, resulting in low installation efficiency, poor accuracy, and safety hazards. In addition, the entire gearbox needs to be disassembled, which wastes materials and time.
Design a coupling assembly fixture, including components such as an input shaft, hydraulic oil channel, lead screw, push sleeve, thrust nut, and hydraulic cylinder. The fixture expands the inner hole of the coupling through the hydraulic oil circuit and pushes the coupling to the designed position, ensuring installation accuracy and safety.
This technology enables safe and reliable installation of couplings, avoids damage to couplings, improves installation efficiency and accuracy, reduces costs, and ensures the quality of gearboxes and safe operation of vehicles.
Smart Images
Figure CN224674737U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a transmission device assembly fixture, specifically, a coupling assembly fixture. Background Technology
[0002] The gearbox input shaft and motor input shaft are connected by two half-couplings. Currently, there are no specialized installation tools for installing the couplings with fixed pressing strokes during gearbox assembly. This makes it easy to exceed the coupling's allowable pressing stroke during installation, causing damage or rendering the coupling unusable. Once the coupling is damaged, it is difficult to remove it from the input shaft, requiring complete disassembly of the gearbox, resulting in wasted materials and time. Existing installation methods are inefficient, have poor installation accuracy, fail to meet design requirements, and cause the gearbox to malfunction. This poses a significant safety hazard during gearbox use and can easily lead to vehicle accidents. Utility Model Content
[0003] To address the shortcomings of the existing technology, this utility model provides a coupling assembly fixture that is simple in structure, easy to install, improves installation efficiency, ensures installation accuracy, reduces installation costs, improves gearbox product quality, and ensures safe vehicle operation.
[0004] The technical solution adopted by this utility model is: A coupling assembly fixture, comprising: Input shaft and coupling; The input shaft has a hydraulic oil inlet at its front end; The hydraulic oil inlet is located at the center of the input shaft; The hydraulic oil channel outlet is located on the circumferential surface of the input shaft; The front end of the lead screw is inserted into the hydraulic oil channel inlet; The hydraulic oil channel inlet and hydraulic oil channel outlet are connected through the hydraulic oil channel of the input shaft; A push sleeve is fitted onto the lead screw; The left end face of the push sleeve is brought into contact with the right end face of the coupling; A thrust nut is provided at the right end of the push sleeve; The thrust nut is threadedly connected to the lead screw; A retaining nut is provided at the rear end of the thrust nut; A drive sleeve is installed on the outside of the thrust nut; The drive sleeve is mounted on the lead screw; The right end face of the drive sleeve is in contact with the left end face of the hydraulic cylinder piston rod; The hydraulic cylinder is mounted on the lead screw; A gasket and a limit nut are sequentially installed on the outer side of the right end face of the hydraulic cylinder; The lead screw is hollow; The right end of the lead screw is connected to the hydraulic oil pipe; The hydraulic cylinder is equipped with a hydraulic oil inlet.
[0005] Preferably, the drive sleeve is provided with a stepped hole, which includes a front section hole, a middle section hole and a rear section hole, wherein the diameter of the front section hole is larger than the diameter of the middle section hole and the diameter of the middle section hole is larger than the diameter of the rear section hole.
[0006] Preferably, the hydraulic oil channel of the input shaft is L-shaped.
[0007] Preferably, the push sleeve is provided with a through hole in the radial direction for discharging hydraulic oil.
[0008] The advantages of this utility model over the prior art are: This invention can be applied to couplings with different fixed pressing strokes. It is safe and reliable during installation and avoids the consequences of gearbox disintegration caused by coupling damage. Compared with the prior art, it ensures material safety and avoids wasting time.
[0009] This utility model relates to a coupling assembly fixture, which is suitable for couplings with a fixed press-in stroke. It has a simple structure, is easy to install, improves installation efficiency, ensures installation accuracy, reduces installation costs, improves gearbox product quality, and ensures safe vehicle operation. Attached Figure Description
[0010] Figure 1 This is a structural schematic diagram of the coupling assembly fixture of this utility model; Figure 2 This is a schematic diagram of the main structure of the push sleeve of the coupling assembly fixture of this utility model; Figure 3 This is a side view of the push sleeve structure of the coupling assembly fixture of this utility model; Figure 4 This is a schematic diagram of the thrust nut structure of the coupling assembly fixture of this utility model; Figure 5 This is a schematic diagram of the drive sleeve structure of the coupling assembly fixture of this utility model; Figure 6 This is a partial three-dimensional structural diagram of the coupling assembly fixture in its working state.
[0011] Explanation of symbols for key components in the attached diagram: In the picture: 1. Input shaft 2. Coupling 3. Input shaft hydraulic oil channel inlet; 4. Input shaft hydraulic oil channel outlet. 5. Lead screw 6. Push sleeve 7. Thrust nut 8. Fixing nut 9. Drive sleeve 10. Hydraulic cylinder 11. Washer 12. Limit nut 13. Hydraulic cylinder oil inlet 14. Hydraulic oil input port 16. Coupling outer sleeve 21. Front section hole; 22. Middle section hole 23. Rear section hole; 24. Through hole 25. Hydraulic oil passage 26. Adjusting shim. Detailed Implementation
[0012] The present invention will now be described in detail with reference to the accompanying drawings and embodiments: Appendix Figure 1 It can be seen that a coupling assembly tooling component includes: Input shaft 1 and coupling 2; the surfaces on which input shaft 1 and coupling 2 mate are conical, and the diameter of the rear end of input shaft 1 is larger than the diameter of the front end; the inner hole of coupling 2 that mates with input shaft 1 is also conical. The input shaft 1 is provided with an input shaft hydraulic oil channel inlet 3 at its front end; The hydraulic oil inlet 3 of the input shaft is located at the center of the input shaft 1; The hydraulic oil channel output port 4 of the input shaft is located on the circumferential surface of the input shaft 1; The input shaft 1 is provided with radially arranged hydraulic oil channels 25; The hydraulic oil channel inlet 3 and the hydraulic oil channel outlet 4 are connected through the hydraulic oil channel 25 of the input shaft. The front end of the lead screw 5 is inserted into the hydraulic oil channel input port 3; The lead screw 5 is fitted with a push sleeve 6 at its front end; the center hole of the push sleeve 6 is larger than the diameter of the lead screw 5. The left end face of the push sleeve 6 is brought into contact with the right end face of the coupling 2; A thrust nut 7 is provided at the right end of the push sleeve 6; the thrust nut 7 limits the push sleeve 6. The thrust nut 7 is threadedly connected to the lead screw 5; A fixing nut 8 is provided at the rear end of the thrust nut 7; the fixing nut 8 is used to fix the position of the thrust nut 7. A drive sleeve 9 is provided on the outside of the thrust nut 7; the stepped hole of the drive sleeve 9 is fitted onto the outside of the thrust nut 7.
[0013] The outer diameter of the thrust nut 7 is smaller than the diameter of the front hole 21 of the drive sleeve 9, but larger than the diameter of the middle hole 22 of the drive sleeve 9. The drive sleeve 9 is mounted on the lead screw 5; the diameter of the rear hole 23 of the drive sleeve 9 is larger than the diameter of the lead screw 5. The left end face of the drive sleeve 9 is in contact with the right end face of the push sleeve 6; The right end face of the drive sleeve 9 is in contact with the left end face of the piston rod of the hydraulic cylinder 10; Hydraulic cylinder 10 is mounted on lead screw 5; the inner diameter of hydraulic cylinder 10 is larger than the diameter of lead screw 5. A gasket 11 and a limit nut 12 are sequentially installed on the outer side of the right end face of the hydraulic cylinder 10; The limit nut 12 is threadedly connected to the lead screw 5 and is used to limit the axial movement of the hydraulic cylinder 5 to prevent the hydraulic cylinder 5 from moving to the right. Lead screw 5 is a hollow lead screw; The right end of lead screw 5 is connected to the hydraulic oil pipe; The hydraulic cylinder 10 is equipped with a hydraulic cylinder oil inlet 13.
[0014] Drive the sleeve 6 structure, such as Figure 2 and 3 As shown.
[0015] The thrust nut has a structure, such as... Figure 4 As shown.
[0016] like Figure 5 As shown, the drive sleeve 9 is provided with a stepped hole; the stepped hole includes: a front section hole 21, a middle section hole 22, and a rear section hole 23; the rear section hole 23 is used for guidance; the diameter of the front section hole 21 is larger than the diameter of the middle section hole 22, and the diameter of the middle section hole 22 is larger than the diameter of the rear section hole 23. The depth of the front section hole 21 is used to adjust the length of the input shaft 1 entering the inner hole of the coupling 2. The depth to which the input shaft 1 enters the inner hole of the coupling 2 varies depending on the specification of the coupling 2.
[0017] There are two ways to adjust the depth of the input shaft 1 entering the inner hole of the coupling 2: The first method: Place internal adjustment shims of different thicknesses (not shown in the figure) at the bottom of the front hole 21.
[0018] The second method: such as Figure 1 As shown, an external adjusting shim 26 can also be placed on the outer side of the right end face of the push sleeve 6. The thickness of the adjusting shim 26 can be used to adjust the depth of the input shaft 1 entering the inner hole of the coupling 2.
[0019] During the assembly process, hydraulic oil needs to be continuously used to expand the inner hole of the coupling 2. The hydraulic oil will continuously overflow from the front and rear ends of the coupling 2. The hydraulic oil overflowing from the rear end has no effect, while the hydraulic oil overflowing from the front end will continuously flow into the push sleeve 6. The push sleeve 6 is provided with a through hole 24 in the radial direction, and the hydraulic oil is discharged from the through hole 24.
[0020] Preferably, the hydraulic oil passage is L-shaped.
[0021] Push sleeve 6, drive sleeve 9 and hydraulic cylinder 10 slide on hollow lead screw 5; thrust nut 7 is threadedly connected to hollow lead screw 5, and thrust nut 7 is connected to lead screw through fixing nut 8.
[0022] The assembly process of this new coupling tooling is as follows: This utility model's coupling assembly fixture has two hydraulic circuits. The first hydraulic circuit is used to expand the inner hole of the coupling 2. The second hydraulic circuit is used to move the coupling 2 on the surface of the input shaft 1, that is, to push the coupling 2, which is pre-installed on the input shaft 1, to the designed installation position of the input shaft 1.
[0023] First hydraulic circuit: Hydraulic oil is input into the hollow lead screw 5 through the hydraulic oil inlet 14. The hydraulic oil enters the radially distributed L-shaped hydraulic oil channels 25 inside the input shaft 1 through the cavity in the center of the lead screw 5 and the hydraulic oil channel inlet 3 of the input shaft. A sealing ring (not shown in the figure) is provided on the mating surface of the left end of the lead screw 5 and the hydraulic oil channel 25. The hydraulic oil is discharged from the hydraulic oil channel outlet 4 of the input shaft. When the hydraulic oil passes through the hydraulic oil channel outlet 4 of the input shaft, it expands the inner hole of the coupling 2 that is in contact with the surface of the input shaft.
[0024] Second hydraulic circuit: Hydraulic oil enters hydraulic cylinder 10 through hydraulic cylinder inlet 13. The left end of the piston rod of hydraulic cylinder 10 moves to the left along the hollow lead screw 5, pushing the drive sleeve 9 to move to the left. The left end face of the drive sleeve 9 comes into contact with the right end face of the push sleeve 6, driving the push sleeve 6 to move to the left. The push sleeve 6 pushes the coupling 2 to move to the left. When the bottom of the stepped hole 21 of the drive sleeve 9 contacts the right end face of the thrust nut, the drive sleeve 9 and the push sleeve 6 stop moving in sequence, and the coupling 2 stops moving. During this process, the hydraulic cylinder piston rod provides low-pressure thrust, and the hydraulic cylinder 10 is subjected to a reaction force when providing thrust. The limit nut 12 restricts the movement of the hydraulic cylinder body to the right.
[0025] This utility model relates to a coupling assembly fixture, which is suitable for couplings with a fixed press-in stroke. It has a simple structure, is easy to install, improves installation efficiency, ensures installation accuracy, reduces installation costs, improves gearbox product quality, and ensures safe vehicle operation.
[0026] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the structure of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.
Claims
1. A coupling assembly fixture, characterized in that, include; Input shaft (1) and coupling (2); The input shaft is provided with a hydraulic oil channel input port (3) at the front end; The hydraulic oil inlet (3) is located at the center of the input shaft (1); The hydraulic oil channel outlet (4) is located on the circumferential surface of the input shaft (1); The front end of the lead screw (5) is inserted into the hydraulic oil channel input port (3); The hydraulic oil channel input port (3) and hydraulic oil channel output port (4) are connected through the input shaft hydraulic oil channel (25); A push sleeve (6) is fitted on the lead screw (5); The left end face of the push sleeve (6) is in contact with the right end face of the coupling (2); A thrust nut (7) is provided at the right end of the push sleeve (6); The thrust nut (7) is threadedly connected to the lead screw (5); The thrust nut (7) has a fixing nut (8) at its rear end; A drive sleeve (9) is provided on the outside of the thrust nut (7); The drive sleeve (9) is mounted on the lead screw (5); The right end face of the drive sleeve (9) is in contact with the left end face of the piston rod of the hydraulic cylinder (10); The hydraulic cylinder (10) is mounted on the lead screw (5); A gasket (11) and a limit nut (12) are sequentially installed on the outer side of the right end face of the hydraulic cylinder. The lead screw (5) is a hollow lead screw; The right end of the lead screw (5) is connected to the hydraulic oil pipe; The hydraulic cylinder (10) is equipped with a hydraulic oil inlet (13).
2. The coupling assembly fixture according to claim 1, characterized in that: The drive sleeve is provided with a stepped hole, which includes a front hole (21), a middle hole (22) and a rear hole (23). The diameter of the front hole (21) is larger than the diameter of the middle hole (22), and the diameter of the middle hole (22) is larger than the diameter of the rear hole (23).
3. The coupling assembly fixture according to claim 1, characterized in that: The hydraulic oil passage (25) of the input shaft is L-shaped.
4. The coupling assembly fixture according to claim 1, characterized in that: The push sleeve (6) is provided with a through hole (24) for discharging hydraulic oil in the radial direction.