Transmission shaft with axial buffering function and motor

Abstract

A drive shaft and motor with axial buffering function are disclosed. The drive shaft includes a drive shaft and a driven shaft. A first disk is coaxially mounted at one end of the drive shaft, and a second disk is coaxially mounted at one end of the driven shaft. The first and second disks are coaxially housed within a sleeve and are positioned opposite each other. The first and second disks transmit torque through the sleeve. Both ends of the sleeve are provided with cover plates, through which the drive shaft and driven shaft pass. A first elastic element is provided between each of the first and second disks and its corresponding cover plate, and a second elastic element is provided between the first and second disks. This design effectively reduces the axial force on the motor shaft, thereby preventing axial displacement of the motor shaft.

Description

Technical Field

[0001] This utility model belongs to the technical field of transmission shaft connection structure, and particularly relates to a transmission shaft and motor with axial buffer function. Background Technology

[0002] Some motors, during operation, not only bear circumferential torque but also axial impact. Prolonged axial impact can easily cause the motor's main shaft to shift axially relative to the fixed bearing, leading to interference between the motor rotor and the motor housing. This axial shift is primarily caused by two factors: firstly, axial movement of the main shaft relative to the inner ring of the bearing, which can be understood as loosening between the main shaft and the inner ring of the bearing; secondly, uneven wear of the bearing balls, causing relative axial movement between the inner and outer rings of the bearing. Regardless of the cause, the resulting axial shift is closely related to the axial impact on the motor's main bearing. Therefore, reducing the impact force on the motor's main bearing is the primary technical problem addressed in this solution. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a transmission shaft and motor with axial buffering function, which can effectively reduce the axial force on the motor spindle, thereby preventing axial displacement of the motor spindle.

[0004] In order to achieve the purpose of this utility model, the following solution is proposed:

[0005] A drive shaft with axial buffer function includes a drive shaft and a driven shaft. A first disk is coaxially mounted at one end of the drive shaft, and a second disk is coaxially mounted at one end of the driven shaft. The first and second disks are coaxially housed within a sleeve, and are positioned opposite each other. The first and second disks transmit torque through the sleeve. Both ends of the sleeve are provided with cover plates, through which the drive shaft and driven shaft pass. A first elastic element is provided between the first and second disks and the corresponding cover plate, and a second elastic element is provided between the first and second disks.

[0006] The beneficial effects of this utility model are: it can effectively protect the mounting structure of the motor spindle, reduce the axial impact of the motor spindle, prevent the spindle from axial displacement, and extend the service life of the motor. Attached Figure Description

[0007] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of this invention.

[0008] Figure 1 A cross-sectional view of this application is shown.

[0009] Figure 2 It shows Figure 1A cross-sectional view along the AA direction.

[0010] The markings in the diagram are: drive shaft-1, first disc-11, driven shaft-2, second disc-21, sleeve-3, cover plate-4, extension section-41, first elastic element-51, second elastic element-52, and spindle-6. Detailed Implementation

[0011] To make the objectives, technical solutions and advantages of the present utility model clearer, the implementation methods of the present utility model will be described in detail below with reference to the accompanying drawings. However, the embodiments described in the present utility model are only some embodiments of the present utility model, and not all embodiments.

[0012] Example 1, as Figure 1 As shown, a drive shaft with axial buffer function includes: a drive shaft 1 and a driven shaft 2. One end of the drive shaft 1 is coaxially provided with a first disk 11, and one end of the driven shaft 2 is coaxially provided with a second disk 21. The first disk 11 and the second disk 21 are coaxially inserted into a sleeve 3. The first disk 11 and the second disk 21 are arranged opposite to each other. The first disk 11 and the second disk 21 transmit torque through the sleeve 3. It can also be understood that the first disk 11 and the second disk 21 are both circumferentially limited with the sleeve 3. Both ends of the sleeve 3 are provided with cover plates 4. The drive shaft 1 and the driven shaft 2 pass through the corresponding cover plates 4. The cover plates 4 are connected to the ends of the sleeve 3 by screws.

[0013] Both the first disc 11 and the second disc 21 are provided with a first elastic element 51 between them and the cover plate 4 at the corresponding end, and a second elastic element 52 is provided between the first disc 11 and the second disc 21.

[0014] With the above-described structure, when the drive shaft 1 and driven shaft 2 are subjected to an inward axial impact, the second elastic element 52 and one of the first elastic elements 51 can be used for buffering, thereby reducing the impact on the fixed bearing of the drive shaft and preventing axial displacement between the drive shaft and the fixed bearing. When the drive shaft 1 and driven shaft 2 are subjected to an outward axial tension, one of the first elastic elements 51 can be used to withstand the impact generated by the tension, and the drive shaft can also be prevented from axially displacing relative to the fixed bearing, thereby ensuring the safety of the motor spindle and preventing axial displacement of the motor spindle relative to the fixed bearing.

[0015] Preferred, such as Figure 2 As shown, the sleeve 3 has a spline hole structure inside, and the external structures of the first disk 11 and the second disk 21 are matched with the spline hole to ensure the smoothness of torque transmission.

[0016] Alternatively, a flat key structure can be provided inside the sleeve 3 and between the outer walls of the first disk 11 and the second disk 21 to transmit torque.

[0017] Preferred, such as Figure 1 As shown, the outer end of the cover plate 4 is provided with an extension section 41 for passing through the drive shaft 1 and the driven shaft 2, so as to improve the stability of the connection between the drive shaft 1 and the driven shaft 2, and ensure the accuracy of the installation position of the drive shaft 1 and the driven shaft 2, and prevent the drive shaft 1 and the driven shaft 2 from tilting relative to the sleeve 3.

[0018] Preferred, such as Figure 1 As shown, the first elastic element 51 is a cylindrical elastic element structure. The first elastic element 51 is respectively sleeved on the driving shaft 1 and the driven shaft 2 to prevent the first elastic element 51 from twisting.

[0019] Preferred, such as Figure 1 As shown, the drive shaft 1 and the driven shaft 2 are both coaxially countersunk at opposite ends. A mandrel 6 is provided inside the sleeve 3. The two ends of the mandrel 6 are respectively inserted into the countersunk holes of the drive shaft 1 and the driven shaft 2. When the second elastic element 52 and one of the first elastic elements 51 are compressed to their limit, the distance between the bottom surfaces of the countersunk holes at both ends is still greater than the length of the mandrel 6. This is to avoid the two ends of the mandrel 6 from contacting the bottom surface of the countersunk hole before the second elastic element 52 and the first elastic element 51 are fully compressed, which would reduce the buffer stroke and affect the buffering effect. This structural design can effectively ensure the coaxial accuracy of the drive shaft 1 and the driven shaft 2 and reduce the circumferential oscillation during rotation.

[0020] Further preferred, such as Figure 1 As shown, the second elastic element 52 is a cylindrical elastic element, which is sleeved on the outside of the mandrel 6 to prevent the second elastic element 52 from twisting.

[0021] Example 2: An electric motor, including the drive shaft with axial buffer function described in Example 1, wherein the drive shaft 1 is the main shaft of the motor.

[0022] The above description is merely a preferred embodiment of this utility model and does not imply its uniqueness or limitation. Those skilled in the art should understand that various changes or equivalent substitutions made to this utility model without departing from its scope are all within the protection scope of this utility model.

Claims

1. A drive shaft with axial buffering function, comprising: The driving shaft (1) and the driven shaft (2) are characterized in that a first disk (11) is coaxially provided at one end of the driving shaft (1), and a second disk (21) is coaxially provided at one end of the driven shaft (2). The first disk (11) and the second disk (21) are coaxially installed inside a sleeve (3). The first disk (11) and the second disk (21) are arranged opposite to each other. The first disk (11) and the second disk (21) transmit torque through the sleeve (3). Both ends of the sleeve (3) are provided with cover plates (4). The driving shaft (1) and the driven shaft (2) pass through the corresponding cover plates (4). A first elastic element (51) is provided between the first disk (11) and the second disk (21) and the corresponding cover plate (4). A second elastic element (52) is provided between the first disk (11) and the second disk (21).

2. A transmission shaft with axial buffering function according to claim 1, characterized in that, The sleeve (3) has a spline hole structure inside, and the external structures of the first disk (11) and the second disk (21) are matched with the spline hole.

3. A transmission shaft with axial buffering function according to claim 1, characterized in that, The outer ends of the cover plate (4) are provided with extension sections (41) for passing through the drive shaft (1) and the driven shaft (2).

4. A transmission shaft with axial buffering function according to claim 1, characterized in that, The cover plate (4) is connected to the end of the sleeve (3) by screws.

5. A transmission shaft with axial buffering function according to claim 1, characterized in that, The first elastic element (51) is a cylindrical elastic element structure, and the first elastic element (51) is respectively sleeved on the driving shaft (1) and the driven shaft (2).

6. A transmission shaft with axial buffering function according to claim 1, characterized in that, The drive shaft (1) and the driven shaft (2) are both coaxially countersunk at opposite ends. A mandrel (6) is provided inside the sleeve (3). The two ends of the mandrel (6) are respectively inserted into the countersunk holes of the drive shaft (1) and the driven shaft (2). When the second elastic element (52) and one of the first elastic elements (51) are compressed to their limit, the distance between the bottom surfaces of the countersunk holes at both ends is still greater than the length of the mandrel (6).

7. A transmission shaft with axial buffering function according to claim 6, characterized in that, The second elastic element (52) is a cylindrical elastic element, which is sleeved on the outside of the mandrel (6).

8. An electric motor, characterized in that, The transmission shaft with axial buffer function included in any one of claims 1 to 7, wherein the drive shaft (1) is the main shaft of the motor.

Images