Motor shaft aluminum tube press fitting tool

Abstract

Disclosed in the application is a motor shaft aluminum pipe press-fitting tool, which comprises a press-fitting base assembly, a power assembly and a connecting assembly. The motor shaft to be press-fitted is installed on the press-fitting base assembly, the power assembly is vertically arranged above the motor shaft to be press-fitted, the motor shaft to be press-fitted is connected with the connecting assembly, and the connecting assembly is connected with the aluminum pipe to be press-fitted. The power assembly drives the aluminum pipe to be press-fitted to enter the motor shaft to be press-fitted. The connecting assembly comprises a hard alloy press head and a rubber sealing ring. The hard alloy press head is provided with a positioning pin, the positioning pin is provided with the rubber sealing ring, and the positioning pin corresponds to the gap of the aluminum pipe to be press-fitted. Through the improvement and optimization of the hard alloy press head and the press-fitting base, the alignment of the oil hole of the aluminum pipe and the oil hole of the shaft body is changed from artificial judgment to tool constraint, so that the defective products caused by the judgment error of unskilled workers are avoided.

Description

Technical Field

[0001] This utility model belongs to the field of press-fit aluminum tube technology, and in particular relates to a press-fit tooling for motor shaft aluminum tubes. Background Technology

[0002] Among the components of new energy vehicles, aluminum tubes may be used in the motor shaft. The motor shaft and the internal aluminum tube adopt an interference fit. The interference fit not only requires high machining accuracy between the aluminum tube and the shaft, which increases the manufacturing cost, but also causes relative movement between the aluminum tube and the shaft during the interference press-fit process. Utility Model Content

[0003] In view of this, the present invention aims to provide a tooling for pressing aluminum tubes for motor shafts to solve at least one technical problem in the background art.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] The motor shaft aluminum tube press-fitting fixture includes a press-fitting base assembly, a power assembly, and a connecting assembly. The motor shaft to be press-fitted is mounted on the press-fitting base assembly, the power assembly is vertically positioned above the motor shaft to be press-fitted, the motor shaft to be press-fitted is connected to the connecting assembly, and the connecting assembly is connected to the aluminum tube to be press-fitted. The power assembly drives the aluminum tube to be press-fitted into the motor shaft.

[0006] The connecting components include a carbide indenter and a rubber sealing ring. The carbide indenter is equipped with a locating pin, and the locating pin is equipped with a rubber sealing ring. The locating pin corresponds to the notch of the aluminum tube to be pressed.

[0007] Furthermore, the locating pin is symmetrically provided with protrusions corresponding to the notches of the aluminum tube to be pressed in.

[0008] Furthermore, the power assembly includes a press rod and a press head connecting plate. The upper ends of the press rod and the press head connecting plate are connected by screws, and the bottom of the press head connecting plate is connected to the carbide press head.

[0009] Furthermore, the end of the pressure head connecting plate is provided with several first mounting holes distributed along the circumference, and the pressure head connecting plate is connected to the press rod screw of the press through the first mounting holes;

[0010] The upper part of the pressure head connecting plate is provided with a first through hole corresponding to the pressure rod of the press machine, and the lower part of the pressure head connecting plate is provided with a second through hole corresponding to the carbide pressure head.

[0011] Furthermore, the pressure head connecting plate is connected to the carbide head by a set screw. The pressure head connecting plate has several set screw holes on one side, and the set screw holes are connected to the stepped holes.

[0012] Furthermore, the press-fit base assembly includes a press-fit base, a fixed base plate, and a limiting gauge bar, with the press-fit base screws mounted on the fixed base plate;

[0013] The motor shaft to be pressed is set on the pressing base, and the limiting gauge bar is inserted into the pressing base and corresponds to the lower oil hole of the motor shaft to be pressed.

[0014] Furthermore, the bottom of the press-fit base is provided with several second mounting holes along the circumference; the press-fit base is connected to the fixing base plate screws through the second mounting holes;

[0015] The press-fit base has a third through hole, which corresponds to the motor shaft to be press-fitted.

[0016] Furthermore, the press-fit base is provided with symmetrical U-shaped holes, and the U-shaped holes and the positioning pins are on the same straight line. The limiting gauge bar is inserted into the lower oil hole of the motor shaft to be press-fitted through the U-shaped holes.

[0017] Furthermore, one end of the limiting gauge bar corresponds to the diameter of the oil hole of the motor shaft to be press-fitted, and the other end is equipped with a handle.

[0018] Compared with existing technologies, the motor shaft aluminum tube press-fitting fixture of this utility model has the following advantages:

[0019] 1. This application significantly improves the consistency of assembly precision. Physical positioning ensures the oil hole is aligned correctly, eliminating human error and lowering the operational threshold. Even unskilled workers can quickly master the process and consistently produce qualified products, reducing training costs. Furthermore, it fundamentally avoids the risk of defective products flowing out due to misjudgment, increasing the product qualification rate and reducing manpower consumption in subsequent inspection stages. This optimized solution achieves cost reduction and efficiency improvement while ensuring quality stability, demonstrating significant economic benefits and production applicability.

[0020] 2. This application improves and optimizes the carbide indenter and the press base, so that the alignment judgment of the oil hole of the aluminum tube and the oil hole of the shaft is changed from manual judgment to tooling constraint, thus avoiding the outflow of defective products due to the judgment error of unskilled workers. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0022] Figure 1 This is a schematic diagram of a motor shaft aluminum tube press-fitting fixture according to an embodiment of the present utility model;

[0023] Figure 2 This is a side view of a motor shaft aluminum tube press-fitting fixture according to an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the pressure head connecting plate of a motor shaft aluminum tube press fitting tool according to an embodiment of the present utility model;

[0025] Figure 4 This is a top view of the pressure head connecting plate of a motor shaft aluminum tube press-fitting fixture according to an embodiment of the present utility model;

[0026] Figure 5 This is a schematic diagram of the carbide press head and locating pin of the press head connecting plate of a motor shaft aluminum tube press fitting tool according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of a motor shaft to be press-fitted using a motor shaft aluminum tube press-fitting fixture according to an embodiment of this utility model;

[0028] Figure 7 This is a schematic diagram of the aluminum tube to be pressed into a motor shaft aluminum tube press-fitting fixture according to an embodiment of this utility model;

[0029] Figure 8 This is a schematic diagram of the press-fit base of a motor shaft aluminum tube press-fitting fixture according to an embodiment of the present utility model;

[0030] Figure 9 This is a top view schematic diagram of the pressing base of a motor shaft aluminum tube pressing fixture according to an embodiment of the present utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Motor shaft to be pressed; 2. Aluminum tube to be pressed; 3. Carbide press head; 4. Positioning pin; 5. Rubber sealing ring; 6. Press rod; 7. Press head connecting plate; 8. First mounting hole; 9. First through hole; 10. Set screw hole; 11. Press base; 12. Fixed base plate; 13. Limiting gauge bar; 14. Second mounting hole; 15. Third through hole; 16. U-shaped hole; 17. Handle; 18. Second through hole; 19. Protrusion; 20. Lower oil hole; 21. Upper oil hole; 22. Notch. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] The motor shaft aluminum tube press-fitting fixture includes a press-fitting base assembly, a power assembly, and a connecting assembly. The motor shaft 1 to be press-fitted is mounted on the press-fitting base assembly. The power assembly is vertically positioned above the motor shaft 1. The motor shaft 1 is connected to the connecting assembly, which in turn is connected to the aluminum tube 2 to be press-fitted. The power assembly drives the aluminum tube 2 to be press-fitted into the motor shaft 1. The connecting assembly includes a carbide press head 3 and a rubber sealing ring 5. The carbide press head 3 has a locating pin 4, and the locating pin 4 has a rubber sealing ring 5. The locating pin 4 corresponds to a notch 22 in the aluminum tube 2 and has symmetrical protrusions corresponding to the notch 22. The carbide press head 3 and the locating pin 4 are connected by cold welding.

[0038] The power assembly includes a press rod 6 and a press head connecting plate 7. The upper end of the press rod 6 and the press head connecting plate 7 are connected by screws, and the bottom of the press head connecting plate 7 is connected to the carbide press head 3. The end of the press head connecting plate 7 is provided with several first mounting holes 8 distributed circumferentially. The press head connecting plate 7 is connected to the press rod 6 by screws through the first mounting holes 8. The upper part of the press head connecting plate 7 is provided with a first through hole 9 corresponding to the press rod 6, and the lower part of the press head connecting plate 7 is provided with a second through hole 18 corresponding to the carbide press head 3.

[0039] The pressure head connecting plate 7 is connected to the carbide head via set screws. One side of the pressure head connecting plate 7 has several set screw holes 10, which communicate with stepped holes. The press-fit base assembly includes a press-fit base 11, a fixed base plate 12, and a limiting gauge bar 13. The press-fit base 11 is screwed onto the fixed base plate 12. The motor shaft 1 to be press-fitted is placed on the press-fit base 11, and the limiting gauge bar 13 is inserted into the press-fit base 11, corresponding to the lower oil hole 20 of the motor shaft 1 to be press-fitted.

[0040] The bottom of the press-fit base 11 has several second mounting holes 14 along its circumference; the press-fit base 11 is screwed to the fixed base plate 12 through the second mounting holes 14; the press-fit base 11 has a third through hole 15, which corresponds to the motor shaft 1 to be press-fitted. The press-fit base 11 has symmetrically arranged U-shaped holes 16, which are on the same straight line as the positioning pin 4. The limiting gauge 13 is inserted into the lower oil hole 20 of the motor shaft 1 to be press-fitted through the U-shaped hole.

[0041] One end of the limiting measuring bar 13 corresponds to the diameter of the oil hole of the motor shaft 1 to be pressed, and the other end is provided with a handle 17. The handle 17 can be easily gripped and can prevent the measuring bar from falling into the shaft body of the motor shaft 1 to be pressed due to misoperation.

[0042] The pressure head connecting plate 7 and the press rod 6 are connected by hexagon socket screws; the square head of the carbide pressure head 3 is slidably embedded into the square hole of the pressure head connecting plate 7, and the two are fixed with set screws. The head of the hard positioning pin 4 is equipped with a rubber sealing ring 5. The aluminum tube is in contact with the end face of the carbide pressure head 3. The two are fixed by friction between the rubber sealing ring 5 and the inner wall of the aluminum tube; the motor shaft 1 to be pressed is placed in the pressing base 11, and the end face is in contact for positioning. A φ4 limiting gauge bar 13 is inserted into the oil hole of the shaft body, and the exposed part of the gauge bar slides into the notch 22 of the pressing base 11; the pressing base 11 and the press base plate are fixed with screws.

[0043] Operating procedures:

[0044] 1. The operator takes out the aluminum tube 2 to be pressed and aligns the notch 22 of the aluminum tube 2 with the positioning pin 4 of the carbide pressure head 3. The end face of the aluminum tube 2 to be pressed contacts the end face of the carbide pressure head 3. At this time, because of the friction between the rubber sealing ring 5 and the inner wall of the aluminum tube 2 to be pressed, after releasing the hand, the aluminum tube 2 to be pressed will be fixed on the carbide pressure head 3.

[0045] 2. Take out the motor shaft 1 to be pressed and place it into the pressing base 11. Rotate the motor shaft 1 to be pressed so that the φ4 lower oil hole 20 of the motor shaft 1 to be pressed is aligned with the U-shaped hole of the pressing base 11. Insert the φ4 limiting measuring rod 13. The measuring rod passes normally through the U-shaped hole and the lower oil hole 20. Because the positioning pin 4 of the carbide pressure head 3 is on the same straight line as the notch 22 of the pressing base 11, the positioning pin 4 is in fixed contact with the notch 22 of the aluminum tube, and the notch 22 of the aluminum tube is on the same straight line as the oil hole of the aluminum tube 2 to be pressed, this operation ensures that the oil hole of the aluminum tube and the lower oil hole 20 of the motor shaft are on the same straight line before pressing (so that the lower oil hole 20 of the motor shaft 1 to be pressed and the upper oil hole 21 of the motor shaft 1 to be pressed are on the same straight line).

[0046] 3. Press the start button of the press to begin pressing. The final position and release process of the press rod 6 are controlled by the press (the press uses existing technology). After the aluminum tube is pressed into place, the press rod 6 begins to drive the carbide head 3 to detach from the aluminum tube. Because the other end of the aluminum tube is tightly fitted with the motor shaft 1 to be pressed, its friction is greater than the friction between the rubber sealing ring 5 and the inner wall of the aluminum tube. Therefore, the carbide head 3 can be released normally. Remove the limit bar 13 and the motor shaft 1 to be pressed, and the pressing of the aluminum tube is completed.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tooling for pressing aluminum tubes for motor shafts, characterized in that: It includes a press-fit base assembly, a power assembly, and a connecting assembly; the motor shaft to be press-fitted is mounted on the press-fit base assembly, the power assembly is vertically positioned above the motor shaft to be press-fitted, the motor shaft to be press-fitted is connected to the connecting assembly, and the connecting assembly is connected to the aluminum tube to be press-fitted; the power assembly drives the aluminum tube to be press-fitted to be press-fitted into the motor shaft to be press-fitted; The connecting components include a carbide indenter and a rubber sealing ring. The carbide indenter is equipped with a locating pin, and the locating pin is equipped with a rubber sealing ring. The locating pin corresponds to the notch of the aluminum tube to be pressed.

2. The motor shaft aluminum tube press-fitting fixture according to claim 1, characterized in that: The locating pin has symmetrical protrusions corresponding to the notches of the aluminum tube to be pressed in.

3. The motor shaft aluminum tube press-fitting fixture according to claim 1, characterized in that: The power assembly includes a press rod and a press head connecting plate. The upper end of the press rod and the press head connecting plate are connected by screws, and the bottom of the press head connecting plate is connected to the carbide press head.

4. The motor shaft aluminum tube press-fitting fixture according to claim 2, characterized in that: The end of the pressure head connecting plate is provided with several first mounting holes distributed along the circumference, and the pressure head connecting plate is connected to the press rod screw of the press through the first mounting holes; The upper part of the pressure head connecting plate is provided with a first through hole corresponding to the pressure rod of the press machine, and the lower part of the pressure head connecting plate is provided with a second through hole corresponding to the carbide pressure head.

5. The motor shaft aluminum tube press-fitting fixture according to claim 3, characterized in that: The pressure head connecting plate is connected to the carbide head by a set screw. The side of the pressure head connecting plate is provided with several set screw holes, which are connected to the stepped holes.

6. The motor shaft aluminum tube press-fitting fixture according to claim 1, characterized in that: The press-fit base assembly includes a press-fit base, a fixed base plate, and a limit gauge bar. The press-fit base is screwed onto the fixed base plate. The motor shaft to be pressed is set on the pressing base, and the limiting gauge bar is inserted into the pressing base and corresponds to the lower oil hole of the motor shaft to be pressed.

7. The motor shaft aluminum tube press-fitting fixture according to claim 6, characterized in that: The bottom of the press-fit base has several second mounting holes along its circumference; the press-fit base is connected to the fixed base plate by screws through the second mounting holes. The press-fit base has a third through hole, which corresponds to the motor shaft to be press-fitted.

8. The motor shaft aluminum tube press-fitting fixture according to claim 6, characterized in that: The press-fit base is provided with symmetrical U-shaped holes, and the U-shaped holes and the positioning pins are on the same straight line. The limiting gauge bar is inserted into the lower oil hole of the motor shaft to be press-fitted through the U-shaped holes.

9. The motor shaft aluminum tube press-fitting fixture according to claim 6, characterized in that: One end of the limiting gauge bar corresponds to the diameter of the oil hole of the motor shaft to be pressed, and the other end is equipped with a handle.

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