Transmission damper structure

Abstract

This utility model relates to a transmission vibration damping structure, comprising: a transmission shaft, a motor shaft, and a connecting sleeve. The connecting sleeve is fitted onto the shaft end of the transmission shaft, and the connecting sleeve and the shaft end of the transmission shaft have an interference fit. One end of the motor shaft has a blind hole, and the connecting sleeve is disposed in the blind hole, with an interference fit between the connecting sleeve and the blind hole. In this transmission vibration damping structure, a copper sleeve is fitted onto the shaft end of the transmission shaft, and then the transmission shaft with the copper sleeve is installed into the motor shaft hole. The motor shaft and the copper sleeve have a small interference fit, as do the copper sleeve and the transmission shaft end. This eliminates any gap between the motor shaft and the transmission shaft. Furthermore, copper is softer than steel and easier to compress, facilitating installation. On the other hand, it ensures no gap between the motor shaft and the transmission shaft while providing some damping, thereby significantly reducing vibration.

Description

Technical Field

[0001] This utility model relates to the field of transmission technology, and in particular to a transmission damping structure. Background Technology

[0002] A gearbox is an independent component consisting of gear drives, worm gear drives, or gear-worm gear drives enclosed in a rigid housing. It is commonly used as a speed reduction transmission device between a prime mover and a working machine. It plays a role in matching speeds and transmitting torque between the prime mover and the working machine or actuator, and its applications are extremely widespread in modern machinery.

[0003] In the field of small transmissions, such as single-stage reducers, these transmissions are inherently lightweight and have poor rigidity. However, as the motor speed increases, the transmission vibrates significantly when driven by the motor, resulting in substantial noise and severely impacting the lifespan of the transmission drive shaft. For the transmission itself, increasing mass or rigidity inevitably increases cost, and significant vibration is a problem that cannot be avoided when increasing the operating speed of the transmission. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem that small reducers in the prior art are prone to vibration during operation, which will cause a lot of noise, not only reducing the life of the motor, but also affecting the equipment, and the noise generated will also affect the working environment.

[0005] To address the aforementioned technical problems, this utility model provides a transmission vibration damping structure, comprising: a transmission shaft, a motor shaft, and a connecting sleeve. The connecting sleeve is fitted onto the shaft end of the transmission shaft, and the connecting sleeve and the shaft end of the transmission shaft have an interference fit. One end of the motor shaft has a blind hole, and the connecting sleeve is disposed within the blind hole, with an interference fit between the connecting sleeve and the blind hole. This utility model's transmission vibration damping structure adds a copper sleeve to the transmission shaft to reduce vibration. Furthermore, for ease of assembly, an exhaust groove is added to the copper sleeve, making installation convenient. This achieves a significant vibration damping effect through a low-cost modification.

[0006] In one embodiment of the present invention, the cross-section of the connecting sleeve is annular, and at least one vent groove is provided on the outer wall of the connecting sleeve along the axial direction of the connecting sleeve. The vent groove is used to discharge the gas in the blind hole when the connecting sleeve is inserted into the blind hole.

[0007] In one embodiment of this utility model, the two ends of the vent groove extend to the two ends of the connecting sleeve axis.

[0008] In one embodiment of this utility model, the connecting sleeve is made of copper.

[0009] In one embodiment of the present invention, one end of the transmission shaft is provided with a cylindrical shaft head, the connecting sleeve is sleeved on the cylindrical shaft head, and the connecting sleeve and the cylindrical shaft head are interference fit.

[0010] In one embodiment of this utility model, two venting grooves are provided, and the two venting grooves are respectively located at both ends of the same diameter of the connecting sleeve.

[0011] In one embodiment of this utility model, the transmission shaft, the motor shaft, and the connecting sleeve are coaxially arranged.

[0012] In one embodiment of this utility model, an input shaft bearing is installed at the end of the transmission shaft away from the connecting sleeve.

[0013] In one embodiment of this utility model, a motor shaft bearing is provided on the outer wall of the motor shaft.

[0014] In one embodiment of this utility model, an oil seal is also provided on the outer wall of the motor shaft.

[0015] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects:

[0016] The transmission damping structure described in this utility model involves fitting a copper sleeve onto the end of the transmission shaft, and then inserting the transmission shaft with the copper sleeve into the motor shaft hole. The motor shaft and the copper sleeve have a small interference fit, as do the copper sleeve and the transmission shaft end. This eliminates any gap between the motor shaft and the transmission shaft. Furthermore, copper is softer than steel and easier to compress, which facilitates installation. On the other hand, it ensures that there is no gap between the motor shaft and the transmission shaft while providing some damping, thereby significantly reducing vibration. Attached Figure Description

[0017] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0018] Figure 1 This is a schematic diagram of the overall structure of the transmission damping structure in a preferred embodiment of the present invention;

[0019] Figure 2 This is a front view of the transmission shaft in a preferred embodiment of the present invention;

[0020] Figure 3 This is a front view of the connecting sleeve in a preferred embodiment of the present invention;

[0021] Figure 4 This is a left view of the connecting sleeve in a preferred embodiment of the present invention;

[0022] Figure 5 This is an assembly diagram of the connecting sleeve and the transmission shaft in a preferred embodiment of the present invention.

[0023] Explanation of reference numerals in the accompanying drawings: 1. Gearbox shaft; 11. Input shaft bearing; 2. Motor shaft; 21. Blind hole; 22. Motor shaft bearing; 23. Oil seal; 3. Connecting sleeve; 31. Vent groove. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0025] Reference Figure 1-5 As shown, the transmission damping structure of this utility model includes: a transmission shaft 1, a motor shaft 2, and a connecting sleeve 3. The transmission shaft 1, motor shaft 2, and connecting sleeve 3 are coaxially arranged. The transmission shaft 1 is a stepped shaft, that is, multiple steps are provided on the outer wall of the transmission shaft 1. The connecting sleeve 3 is fitted onto the shaft end of the transmission shaft 1, and the connecting sleeve 3 and the shaft end of the transmission shaft 1 are interference-fitted. One end of the motor shaft 2 is provided with a blind hole 21. The cross-section of the blind hole 21 is circular. The connecting sleeve 3 is disposed in the blind hole 21, and the connecting sleeve 3 and the blind hole 21 are interference-fitted. The connection between the transmission shaft 1 and the motor shaft 2 is realized through the connecting sleeve 3.

[0026] Reference Figure 3 , 4 As shown, the connecting sleeve 3 has an annular cross-section, and at least one vent groove 31 is provided on the outer wall of the connecting sleeve 3 along the axial direction of the connecting sleeve 3. The vent groove 31 is used to discharge the gas in the blind hole 21 when the connecting sleeve 3 is inserted into the blind hole 21. Since the connection between the motor shaft 2 and the transmission shaft 1 is a blind hole, if the transmission shaft 1 is inserted into the blind hole 21 with interference fit, the gas cannot be discharged, which will result in a large installation pressure required, or even the shaft cannot be pressed down. Therefore, a vent groove 31 is added to the connecting sleeve 3 to effectively reduce the installation difficulty. Preferably, the two ends of the vent groove 31 extend to the two ends of the axial direction of the connecting sleeve 3. And the material of the connecting sleeve 3 is copper.

[0027] The preferred configuration of the aforementioned venting groove 31 is that there are two venting grooves 31, and the two venting grooves 31 are respectively located at both ends of the same diameter of the connecting sleeve 3. After the connecting sleeve 3 is inserted into the blind hole 21, the cavity of the blind hole 21 is connected to the outside through the venting groove 31. In this way, during the process of gradually pressing the transmission shaft 1 with the connecting sleeve 3 into the blind hole 21, the gas in the blind hole 21 is discharged through the venting groove 31, which will not cause the internal pressure of the blind hole 21 to be higher than that of the outside, thus affecting the assembly between the transmission shaft 1 and the motor shaft 2.

[0028] In the above structure, one end of the transmission shaft 1 is provided with a cylindrical shaft head, the connecting sleeve 3 is sleeved on the cylindrical shaft head, and the connecting sleeve 3 and the cylindrical shaft head are interference fit.

[0029] In addition, an input shaft bearing 11 is installed at the end of the transmission shaft 1 away from the connecting sleeve 3. A motor shaft bearing 22 is provided on the outer wall of the motor shaft 2. An oil seal 23 is also provided on the outer wall of the motor shaft 2.

[0030] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A transmission damper structure characterized by, include: The transmission shaft, motor shaft, and connecting sleeve are provided. The connecting sleeve is fitted onto the shaft end of the transmission shaft, and the connecting sleeve and the shaft end of the transmission shaft are interference-fitted. One end of the motor shaft is provided with a blind hole, and the connecting sleeve is disposed in the blind hole, and the connecting sleeve and the blind hole are interference-fitted.

2. The transmission damping structure according to claim 1, characterized by: The connecting sleeve has an annular cross-section, and at least one vent groove is provided on the outer wall of the connecting sleeve along the axis of the connecting sleeve. The vent groove is used to discharge the gas in the blind hole when the connecting sleeve is inserted into the blind hole.

3. The transmission damper arrangement of claim 2, characterized in that: The two ends of the ventilation groove extend to the two ends of the connecting sleeve axis.

4. The transmission damping structure of claim 1, wherein: The connecting sleeve is made of copper.

5. The transmission damping structure of claim 2, wherein: One end of the transmission shaft is provided with a cylindrical shaft head, and the connecting sleeve is sleeved on the cylindrical shaft head, with an interference fit between the connecting sleeve and the cylindrical shaft head.

6. The transmission damping structure of claim 2, wherein: The ventilation slots are configured as two, and the two ventilation slots are located at both ends of the same diameter of the connecting sleeve.

7. The transmission vibration damping structure according to claim 1, characterized by: The transmission shaft, motor shaft, and connecting sleeve are coaxially arranged.

8. The transmission vibration damping structure according to claim 1, characterized by: An input shaft bearing is installed at the end of the transmission shaft away from the connecting sleeve.

9. The transmission damping structure according to claim 8, characterized in that: The outer wall of the motor shaft is provided with a motor shaft bearing.

10. The transmission damping structure of claim 9, wherein: An oil seal is also provided on the outer wall of the motor shaft.

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