Aluminum pipe press fitting tool for motor shaft

The assembly tool for electric motor shafts in new energy vehicles addresses the challenges of high costs and movement during overfitting by using a spring-assisted, pneumatically aided alignment mechanism for precise aluminum tube fitting.

CN223098491UActive Publication Date: 2025-07-15TIANJIN TIANHAI PRECISION FORGING
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Patent Information

Application Number
CN202421988064.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-16
Publication Date
2025-07-15
Estimated Expiration
2034-08-16

AI Technical Summary

Technical Problem

In new energy vehicles, the interference coordination between the motor shaft and aluminum pipe requires high precision, which leads to an increase in manufacturing costs and is prone to relative movement during the pressing process.

Method used

An aluminum tube press-fit tooling including support components, press-fit positioning base, motor shaft bracket and aluminum tube press head component is designed. By pushing the coordination of components and springs, the interference fit between the aluminum tube and the motor shaft is realized, and the movement is assisted by airflow and air holes to ensure the stability and accuracy of the press-fit process.

Benefits of technology

The pressing accuracy of the aluminum tube and the motor shaft is improved, the manufacturing cost is reduced, and the reset device can be convenient for multiple use, avoiding the relative movement of the aluminum tube and the motor shaft during the pressing process.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides an aluminum pipe press fitting tool for a motor shaft. The aluminum pipe press fitting tool comprises a supporting component, a press fitting positioning base, a motor shaft supporting pad and an aluminum pipe pressing head component. The press-fitting positioning base is installed on the supporting component, the motor shaft supporting pad is installed on the press-fitting positioning base in a threaded mode, the interior of the press-fitting positioning base is connected with the aluminum pipe pressing head component through the spring, and the aluminum pipe pressing head component is arranged in the motor shaft supporting pad in a sliding mode. A pushing assembly is arranged on the base part; the motor shaft is arranged on the motor shaft supporting cushion, an aluminum pipe is arranged in the motor shaft, and the aluminum pipe moves along the interior of the motor shaft through the pushing assembly, so that the aluminum pipe pressing head piece moves along the motor shaft supporting cushion. The motor shaft press-fitting positioning device has the advantages that the press-fitting positioning base is in threaded connection with the motor shaft supporting pad, an aluminum pipe is in interference fit with the motor shaft under the action of the pushing assembly, and after the device is matched, the device can be reset through the spring for next press-fitting.
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Description

Technical Field

[0001] The utility model belongs to the field of press-fitting aluminum tubes, and particularly relates to a press-fitting tooling for an aluminum tube of a motor shaft. Background Technique

[0002] In new energy vehicles, the motor shaft, as a key component of the electric drive system, its design and material selection are crucial for ensuring the normal operation and service life of the motor.

[0003] Among the related components of new energy vehicles, an aluminum tube may be used inside the motor shaft. The motor shaft and the internal aluminum tube are in interference fit. The interference fit not only requires high machining accuracy between the aluminum tube and the rotating shaft, resulting in increased manufacturing costs, but also causes relative movement between the aluminum tube and the rotating shaft during the interference press-fitting process. Content of the Utility Model

[0004] In view of this, the utility model aims to provide a press-fitting tooling for an aluminum tube of a motor shaft to solve at least one technical problem in the background technique.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A press-fitting tooling for an aluminum tube of a motor shaft includes a support component, a press-fitting positioning base, a motor shaft support pad, and an aluminum tube press head component;

[0007] The press-fitting positioning base is installed on the support component, the motor shaft support pad is threadedly installed on the press-fitting positioning base, the press-fitting positioning base is connected to the aluminum tube press head component through a spring, and the aluminum tube press head component is slidably arranged inside the motor shaft support pad;

[0008] A pushing component is provided on the base component;

[0009] The motor shaft is arranged on the motor shaft support pad, an aluminum tube is arranged inside the motor shaft, and the aluminum tube moves along the inside of the motor shaft through the pushing component, so that the aluminum tube press head component moves along the motor shaft support pad, and the aluminum tube and the motor shaft are in interference fit to complete the press-fitting.

[0010] Further, the bottom of the press-fitting positioning base is installed on the base component, the upper part of the press-fitting positioning base is provided with an external thread, and the bottom of the motor shaft support pad is provided with an internal thread corresponding to the external thread;

[0011] The press-fitting positioning base and the motor shaft support pad are in threaded connection.

[0012] Further, a first groove is provided in the middle of the press-fitting positioning base, a first air hole is provided on the first groove, and one end of the spring is arranged in the first groove.

[0013] Further, one end of the motor shaft support pad is provided with a mounting groove corresponding to the first groove, and a component threadedly connected to the press-fitting positioning base is provided in the mounting groove. The other end is provided with a second groove corresponding to the motor shaft;

[0014] The motor shaft support pad is provided with a slide rail corresponding to the aluminum tube press head component, and the slide rail is arranged between the mounting groove and the second groove.

[0015] Further, the aluminum tube press head component includes a press head and a press tube. The press tube is arranged on the press head, and a third groove corresponding to the slide rail is provided on the press head;

[0016] The end of the press tube is provided with a protrusion corresponding to the notch of the aluminum tube, and the diameter of the press tube corresponds to the diameter of the aluminum tube.

[0017] The bottom of the press head is provided with a fourth groove, and a spring is arranged in the fourth groove.

[0018] Further, one end of the aluminum tube is provided with a notch corresponding to the protrusion, and the other end of the aluminum tube is provided with a fifth groove corresponding to the pushing component.

[0019] Further, the support component includes a workbench, a support plate, and a side plate;

[0020] A plurality of support plates are arranged below the workbench, and the press-fitting positioning base is arranged on the workbench;

[0021] The side plate is arranged on the workbench, a top plate is provided on the side plate, and the pushing component is arranged at the bottom of the top plate;

[0022] A positioning ring is provided on the side plate, the positioning ring is arranged above the motor shaft support pad, a snap ring corresponding to the positioning ring is provided at the bottom of the motor shaft, the diameter of the positioning ring is larger than the diameter of the motor shaft, and the diameter of the positioning ring is smaller than the diameter at the snap ring corresponding to the positioning ring.

[0023] Further, a sixth groove for installing the press-fitting positioning base is provided on the workbench, and a second air hole corresponding to the first air hole is provided.

[0024] Further, the pushing component includes a pushing cylinder, a pushing rod, and a guide rod;

[0025] The installation end of the pushing cylinder and the guide rod are both arranged on the support component, and the output end of the pushing cylinder is connected to the pushing rod;

[0026] A guide block is provided on the pushing rod, a connecting rod is provided on the guide block, and a sliding block is provided on the connecting rod;

[0027] The sliding block is slidably arranged on the guide rod.

[0028] The diameter of the pushing rod corresponds to the fifth groove at the end of the aluminum tube.

[0029] Compared with the prior art, the aluminum tube press-fitting tooling for a motor shaft of the present utility model has the following advantages:

[0030] 1. The press-fitting positioning base of the present application is threadedly connected to the motor shaft support pad. The aluminum tube is in interference fit with the motor shaft under the action of the pushing component. After the device is assembled, the device can be reset by the spring for the next press-fitting.

[0031] 2. The press-fitting positioning base of the present device is installed on the workbench, and air flow can pass through during the press-fitting process through the first air hole and the second air hole, enabling the aluminum tube press head component to move along the motor shaft support pad.

[0032] 3. The top of the aluminum tube press head component of the present application is provided with a protrusion, which can cooperate with the aluminum tube, ensuring the angular requirements for press-fitting the aluminum tube and preventing rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0034] Figure 1 is an assembly schematic diagram of the press-fitting positioning base and the motor shaft support pad according to an embodiment of the present utility model;

[0035] Figure 2 is a schematic diagram of the press-fitting positioning base according to an embodiment of the present utility model;

[0036] Figure 3 is a schematic diagram of the motor shaft support pad according to an embodiment of the present utility model;

[0037] Figure 4 is a schematic diagram of the aluminum tube press head component according to an embodiment of the present utility model;

[0038] Figure 5 is a side schematic diagram of the aluminum tube press head component according to an embodiment of the present utility model;

[0039] Figure 6 is a schematic diagram of the aluminum tube according to an embodiment of the present utility model;

[0040] Figure 7 is an initial schematic diagram of the aluminum tube press-fitting tooling for a motor shaft according to an embodiment of the present utility model;

[0041] Figure 8 is a schematic diagram of the aluminum tube press-fitting tooling for a motor shaft according to an embodiment of the present utility model after inserting the aluminum tube;

[0042] Figure 9Schematic diagram of an aluminum tube press-fitting tooling for a motor shaft according to an embodiment of the present utility model after the aluminum tube and the motor shaft are in interference fit.

[0043] Description of reference numerals:

[0044] 1. Press-fitting positioning base; 2. External thread; 3. First groove; 4. First air hole; 5. Spring; 6. Motor shaft; 7. Aluminum tube; 8. Motor shaft support pad; 9. Second groove; 10. Slide rail; 11. Installation groove; 12. Aluminum tube press head component; 121. Press head; 122. Pressing tube; 123. Third groove; 124. Protrusion; 125. Fourth groove; 13. Notch; 14. Fifth groove; 15. Workbench; 16. Support plate; 17. Side plate; 18. Top plate; 19. Positioning ring; 20. Sixth groove; 21. Second air hole; 22. Pushing cylinder; 23. Pushing rod; 24. Guide rod; 25. Connecting rod; 26. Sliding block; 27. Guide block. Detailed implementation manners

[0045] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0046] The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0047] As Figures 1 to 9 shown, an aluminum tube press-fitting tooling for a motor shaft includes a support component, a press-fitting positioning base 1, a motor shaft support pad 8, and an aluminum tube press head component 12; the press-fitting positioning base 1 is installed on the support component, the motor shaft support pad 8 is threadedly installed on the press-fitting positioning base 1, the press-fitting positioning base 1 is connected to the aluminum tube press head component 12 through a spring 5, and the aluminum tube press head component 12 is slidably arranged inside the motor shaft support pad 8; a pushing assembly is provided on the base component; the motor shaft 6 is arranged on the motor shaft support pad 8, an aluminum tube 7 is arranged inside the motor shaft 6, and the aluminum tube 7 moves along the inside of the motor shaft 6 through the pushing assembly, so that the aluminum tube press head component 12 moves along the motor shaft support pad 8, and the aluminum tube 7 and the motor shaft 6 are in interference fit to complete the press-fitting.

[0048] The bottom of the press-fitting positioning base 1 is installed on the base component, the upper part of the press-fitting positioning base 1 is provided with an external thread 2, and the bottom of the motor shaft support pad 8 is provided with an internal thread corresponding to the external thread 2; the press-fitting positioning base 1 and the motor shaft support pad 8 are in threaded connection. A first groove 3 is provided in the middle of the press-fitting positioning base 1, a first air hole 4 is provided on the first groove 3, and one end of the spring 5 is arranged in the first groove 3.

[0049] One end of the motor shaft support pad 8 is provided with an installation groove 11 corresponding to the first groove 3. A component threadedly connected to the press-fitting positioning base 1 is provided in the installation groove 11, and a second groove 9 corresponding to the motor shaft 6 is provided at the other end. A slide rail 10 corresponding to the aluminum tube press head component 12 is provided on the motor shaft support pad 8, and the slide rail 10 is arranged between the installation groove 11 and the second groove 9.

[0050] The aluminum tube press head component 12 includes a press head 121 and a press tube 122. The press tube 122 is arranged on the press head 121. A third groove 123 corresponding to the slide rail 10 is provided on the press head 121. A protrusion 124 corresponding to the notch 13 of the aluminum tube 7 is provided at the end of the press tube 122, and the diameter of the press tube 122 corresponds to the diameter of the aluminum tube 7. A fourth groove 125 is provided at the bottom of the press head 121, and the spring 5 is arranged in the fourth groove 125.

[0051] One end of the aluminum tube 7 is provided with a notch 13 corresponding to the protrusion 124, and the other end of the aluminum tube 7 is provided with a fifth groove 14 corresponding to the pushing component.

[0052] The support component includes a workbench 15, a support plate 16, and a side plate 17. A plurality of support plates 16 are arranged below the workbench 15, and the press-fitting positioning base 1 is arranged on the workbench 15. The side plate 17 is arranged on the workbench 15. A top plate 18 is provided on the side plate 17, and the pushing component is arranged at the bottom of the top plate 18. A positioning ring 19 is provided on the side plate 17, and the positioning ring 19 is arranged above the motor shaft support pad 8. A snap ring corresponding to the positioning ring 19 is provided at the bottom of the motor shaft 6. The diameter of the positioning ring 19 is larger than the diameter of the motor shaft 6, and the diameter of the positioning ring 19 is smaller than the diameter at the snap ring corresponding to the positioning ring 19. A sixth groove 20 for installing the press-fitting positioning base 1 is provided on the workbench 15, and a second air hole 21 corresponding to the first air hole 4 is provided.

[0053] The pushing component includes a pushing cylinder 22, a pushing rod 23, and a guide rod 24. The installation end of the pushing cylinder 22 and the guide rod 24 are both arranged on the support component, and the output end of the pushing cylinder 22 is connected to the pushing rod 23. A guide block 27 is provided on the pushing rod 23, a connecting rod 25 is provided on the guide block 27, and a sliding block 26 is provided on the connecting rod 25. The sliding block 26 is slidably arranged on the guide rod 24. The diameter of the pushing rod 23 corresponds to the fifth groove 14 at the end of the aluminum tube 7.

[0054] In specific use, the first air hole 4 and the second air hole 21 are Φ8 holes. During the press-fitting process, air flow can pass through. The spring 5 is placed above to support the aluminum tube 7 and the angle press head 121, enabling the aluminum tube 7 and the angle press head 121 to slide up and down.

[0055] The spring 5 has a diameter of Φ6 and a thickness of 1.5 mm. The spring 5 can enable the aluminum tube 7 to be normally pressed in without bending, and the spring 5 plays a resetting role.

[0056] In a specific implementation, the motor shaft support pad 8 is threadedly installed on the press-fitting positioning base 1. One end of the motor shaft 6 inserted into the aluminum tube 7 passes through the positioning ring 19 and is placed on the press-fitting positioning base 1. The positioning ring 19 can increase the stability of the device. There can be a positioning ring 19, or the device can also be without a positioning ring 19. One end of the motor shaft 6 is clamped with the second groove 9, and the notch 13 at one end of the aluminum tube 7 cooperates with the protrusion 124, enabling the aluminum tube 7 to move along the motor shaft support pad 8 by the aluminum tube pressing head component 12. The other end of the aluminum tube 7 cooperates with the push rod 23 through the fifth groove 14. The push cylinder 22 starts to move, causing the push rod 23 to move downward. There is a guide rod 24 beside it. After the push cylinder 22 pushes the aluminum tube 7 to be in interference fit with the motor shaft 6, the push cylinder 22 resets. The motor shaft 6 inserted with the aluminum tube 7 is taken out, and the aluminum tube pressing head component 12 is reset by the spring 5.

[0057] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An aluminum tube press-fitting tooling for a motor shaft, characterized in that: It includes a support component, a press-fitting positioning base, a motor shaft support pad, and an aluminum tube press head component; The press-fitting positioning base is installed on the support component, the motor shaft support pad is threadedly installed on the press-fitting positioning base, the press-fitting positioning base is connected to the aluminum tube press head component through a spring inside, and the aluminum tube press head component is slidably arranged inside the motor shaft support pad; A pushing component is provided on the base component; The motor shaft is arranged on the motor shaft support pad, an aluminum tube is arranged inside the motor shaft, and the aluminum tube moves along the inside of the motor shaft through the pushing component, so that the aluminum tube press head component moves along the motor shaft support pad.

2. The aluminum tube press-fitting tooling for a motor shaft according to claim 1, wherein: The bottom of the press-fitting positioning base is installed on the base component, the upper part of the press-fitting positioning base is provided with an external thread, and the bottom of the motor shaft support pad is provided with an internal thread corresponding to the external thread; The press-fitting positioning base and the motor shaft support pad are threadedly connected.

3. The aluminum tube press-fitting tooling for a motor shaft according to claim 1, characterized in that: A first groove is provided in the middle of the press-fitting positioning base, a first air hole is provided on the first groove, and one end of the spring is arranged in the first groove.

4. The aluminum tube press-fitting tooling for a motor shaft according to claim 1, characterized in that: One end of the motor shaft support pad is provided with an installation groove corresponding to the first groove, a component threadedly connected to the press-fitting positioning base is arranged in the installation groove, and a second groove corresponding to the motor shaft is provided at the other end; A slide rail corresponding to the aluminum tube press head component is provided on the motor shaft support pad, and the slide rail is arranged between the installation groove and the second groove.

5. The aluminum tube press-fitting tooling for a motor shaft according to claim 1, characterized in that: The aluminum tube press head component includes a press head and a press tube, the press tube is arranged on the press head, and a third groove corresponding to the slide rail is provided on the press head; A protrusion corresponding to the notch of the aluminum tube is provided at the end of the press tube, and the diameter of the press tube corresponds to the diameter of the aluminum tube; A fourth groove is provided at the bottom of the press head, and the spring is arranged in the fourth groove.

6. The aluminum tube press-fitting tooling for a motor shaft according to claim 5, characterized in that: One end of the aluminum tube is provided with a notch corresponding to the protrusion, and the other end of the aluminum tube is provided with a fifth groove corresponding to the pushing component.

7. An aluminum tube press-fitting tooling for a motor shaft according to claim 1, characterized in that: The support component includes a workbench, a support plate, and a side plate; A plurality of support plates are arranged below the workbench, and the press-fitting positioning base is arranged on the workbench; The side plate is arranged on the workbench, a top plate is provided on the side plate, and the pushing component is arranged at the bottom of the top plate; A positioning ring is provided on the side plate, the positioning ring is arranged above the motor shaft support pad, a snap ring corresponding to the positioning ring is provided at the bottom of the motor shaft, the diameter of the positioning ring is larger than the diameter of the motor shaft, and the diameter of the positioning ring is smaller than the diameter at the snap ring corresponding to the positioning ring.

8. An aluminum tube press-fitting tooling for a motor shaft according to claim 7, characterized in that: A sixth groove for installing the press-fitting positioning base is provided on the workbench, and a second air hole corresponding to the first air hole is provided.

9. The aluminum tube press-fitting tooling for a motor shaft according to claim 7, characterized in that: The pushing component includes a pushing cylinder, a pushing rod, and a guide rod; The installation end of the pushing cylinder and the guide rod are both arranged on the support component, and the output end of the pushing cylinder is connected to the pushing rod; A guide block is provided on the pushing rod, a connecting rod is provided on the guide block, and a sliding block is provided on the connecting rod; The sliding block is slidably arranged on the guide rod; The diameter of the pushing rod corresponds to the fifth groove at the end of the aluminum tube.