Flange installation waterproof structure of transmission shaft

Abstract

The flange installation waterproof structure of the transmission shaft comprises a flange body and a water retaining cover, the flange body comprises a first inner wall and a second inner wall, the inner diameter of the second inner wall is smaller than that of the first inner wall, an annular extending portion is arranged on the second inner wall, a drainage channel is formed between the extending portion and the first inner wall, and the water retaining cover is arranged on the first inner wall. A plurality of drainage holes communicated with the drainage channel are formed in the outer surface of the flange body, the water retaining cover is installed on the transmission shaft and rotates along with the transmission shaft, the extending part extends towards the water retaining cover, and the water retaining cover is located above the extending part so as to cover the space between the extending part and the transmission shaft. The technical scheme can effectively prevent rainwater from intruding into the bearing chamber in an outdoor rainy environment.

Description

Technical Field

[0001] This utility model relates to a waterproof structure for flange mounting of a drive shaft. Background Technology

[0002] Since most reducer input ends do not match the motor shaft diameter, a transition flange is required for connection. However, in some outdoor environments, the motor mounting flange is often not a fully enclosed structure. Rainwater can flow into the bearing chamber along the inner wall of the flange, bringing in dust and other impurities that damage the bearing's operating environment and affect its service life. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a waterproof structure for flange mounting of a drive shaft to prevent rainwater from entering the bearing chamber when the motor is used outdoors.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a waterproof structure for flange mounting of a drive shaft, comprising a flange body and a water-blocking cover. The flange body includes a first inner wall and a second inner wall, the inner diameter of the second inner wall being smaller than the inner diameter of the first inner wall. An annular extension is provided on the second inner wall, and a drainage channel is formed between the extension and the first inner wall. The outer surface of the flange body is provided with a plurality of drainage holes communicating with the drainage channel. The water-blocking cover is mounted on the drive shaft and rotates with the drive shaft. The extension extends toward the water-blocking cover, and the water-blocking cover is located above the extension to cover the space between the extension and the drive shaft.

[0005] As a further improvement of this utility model, the water-blocking cover is provided with a guide surface that is inclined toward the drainage channel.

[0006] As a further improvement of this utility model, a sealing element is provided between the extension and the drive shaft, with one side of the sealing element abutting against the drive shaft and the other side abutting against the second inner wall.

[0007] As a further improvement of this utility model, the top of the sealing member on the side corresponding to the water shield is higher than the top of the extension.

[0008] As a further improvement of this utility model, the sealing element is provided with a first sealing part and a second sealing part on the side that abuts against the transmission shaft. The first sealing part and the second sealing part are annular and coaxially distributed on the inner wall of the sealing element.

[0009] As a further improvement of this utility model, the drainage holes are arranged circumferentially along the flange body.

[0010] As a further improvement of this utility model, the drain hole is inclined downward.

[0011] The beneficial effects of this utility model are: this technical solution can effectively prevent rainwater from entering the bearing chamber in outdoor rainy weather. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0013] Figure 2 This is a schematic diagram of the installation environment for an embodiment of this utility model.

[0014] Reference numerals: 1. Flange body; 2. Water baffle; 3. First inner wall; 4. Second inner wall; 5. Extension; 6. Drainage channel; 7. Drainage hole; 8. Drive shaft; 9. Guide surface; 10. Seal; 11. First sealing part; 12. Second sealing part. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0016] Reference Figure 1-2 As shown, a waterproof structure for mounting a transmission shaft flange includes a flange body 1 and a water-blocking cover 2. The flange body 1 includes a first inner wall 3 and a second inner wall 4. The inner diameter of the second inner wall 4 is smaller than the inner diameter of the first inner wall 3. An annular extension 5 is provided on the second inner wall 4, and a drainage channel 6 is formed between the extension 5 and the first inner wall 3. The outer surface of the flange body 1 is provided with a plurality of drainage holes 7 communicating with the drainage channel 6. The water-blocking cover 2 is mounted on the transmission shaft 8 and rotates with the transmission shaft 8. The extension 5 extends toward the water-blocking cover 2, and the water-blocking cover 2 is located above the extension 5 to cover the space between the extension 5 and the transmission shaft 8.

[0017] The first inner wall 3 and the second inner wall 4 of the flange body 1 are coaxially arranged annular inner walls. The extension 5 extends and protrudes towards the water baffle 2 to prevent rainwater falling into the drainage channel 6 from entering the bearing chamber. The water baffle 2 is fixed to the drive shaft 8 by interference fit or bolt connection. During operation, the drive shaft 8 drives the water baffle 2 to rotate synchronously and throw the rainwater towards the drainage channel 6. The drainage hole 7 connected to the drainage channel 6 is used for the discharge of rainwater to prevent rainwater from accumulating in the drainage channel 6.

[0018] To further improve the efficiency of rainwater guidance and drainage, in one optional scheme, the water-blocking cover 2 is provided with a guide surface 9 that is inclined toward the drainage channel 6. The guide surface 9 of the water-blocking cover 2 is an annular inclined surface with its inclination direction toward the drainage channel 6. Even if the drive shaft 8 is stationary, the guide surface 9 can guide rainwater to flow toward the drainage channel 6 and prevent rainwater accumulation.

[0019] Further optimization can be achieved by selecting the following method to enhance sealing performance and reduce rainwater intrusion through the gap between the extension 5 and the drive shaft 8. A seal 10 is provided between the extension 5 and the drive shaft 8. One side of the seal 10 abuts against the drive shaft 8, and the other side abuts against the second inner wall 4. The seal 10 is made of an elastic material, such as rubber or silicone. The outer wall of the seal 10 is fixed to the second inner wall 4 by interference fit or bonding. The inner wall abuts tightly against the outer surface of the drive shaft 8 to form a seal.

[0020] In some configurations, the top of the seal 10 on one side corresponding to the water shield 2 is higher than the top of the extension 5. This configuration ensures that even in heavy rain, the drainage efficiency of the drain hole 7 cannot keep up with the rate of rainwater accumulation, thus reducing the amount of rainwater accumulating on the seal 10 after the rain stops.

[0021] In order to enhance the sealing reliability between the seal 10 and the drive shaft 8 and avoid sealing failure due to wear or aging of a single sealing surface, in an optional solution, the seal 10 is provided with a first sealing part 11 and a second sealing part 12 on the side that abuts against the drive shaft 8. The first sealing part 11 and the second sealing part 12 are annular and coaxially distributed on the inner wall of the seal 10.

[0022] In one alternative embodiment, the seal 10 has a first sealing portion 11 and a second sealing portion 12 on the side abutting the drive shaft 8. The first sealing portion 11 and the second sealing portion 12 are annular and coaxially distributed on the inner wall of the seal 10. This arrangement enhances the sealing reliability between the seal 10 and the drive shaft 8, preventing seal failure due to wear or aging of a single sealing surface. The first sealing portion 11 and the second sealing portion 12 form two independent radial seals with the outer surface of the drive shaft 8 through elastic deformation. When external moisture attempts to penetrate through the gap between the seal 10 and the drive shaft 8, it must successively break through the first sealing portion 11 and the second sealing portion 12. Even if the first sealing portion 11 experiences slight wear or aging due to long-term use, the second sealing portion 12 can still maintain a good sealing condition.

[0023] To ensure more even drainage from the drain holes 7 and prevent localized water accumulation, in one optional embodiment, the drain holes 7 are arranged circumferentially along the flange body 1. In this embodiment, four drain holes 7 are provided and are evenly distributed circumferentially along the flange body 1.

[0024] Specifically, the following optimization method can be selected to utilize gravity to accelerate drainage and prevent water from stagnating in the drain hole 7. The drain hole 7 is set at an angle downwards. The axis of the drain hole 7 forms a downward angle with the radial direction of the flange body 1, making the internal channel of the drain hole 7 slope downwards. After the water entering the drain channel 6 flows into the drain hole 7, it will flow rapidly downwards along the inclined channel of the drain hole 7 under the action of gravity and its own flow inertia, and be discharged directly to the outside of the flange body 1. It does not need to rely on the pressure generated by the large accumulation of water in the drain channel 6 to discharge.

[0025] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A waterproof flange mounting structure for a drive shaft, characterized in that, The flange includes a flange body and a water baffle. The flange body includes a first inner wall and a second inner wall. The inner diameter of the second inner wall is smaller than that of the first inner wall. The second inner wall has an annular extension. A drainage channel is formed between the extension and the first inner wall. The outer surface of the flange body has several drainage holes communicating with the drainage channel. The water baffle is mounted on a drive shaft and rotates with the drive shaft. The extension extends toward the water baffle. The water baffle is located above the extension to cover the space between the extension and the drive shaft.

2. The flange mounting waterproof structure for the drive shaft according to claim 1, characterized in that, The water-blocking cover is provided with a guide surface that is inclined towards the drainage channel.

3. The waterproof structure for flange mounting of the drive shaft according to claim 1 or 2, characterized in that, A seal is provided between the extension and the drive shaft, with one side of the seal abutting against the drive shaft and the other side abutting against the second inner wall.

4. The flange mounting waterproof structure for the drive shaft according to claim 3, characterized in that, The top of the seal on the side corresponding to the water shield is higher than the top of the extension.

5. The flange mounting waterproof structure for the drive shaft according to claim 4, characterized in that, The sealing element has a first sealing part and a second sealing part on the side that abuts the drive shaft. The first sealing part and the second sealing part are annular and coaxially distributed on the inner wall of the sealing element.

6. The flange mounting waterproof structure for the drive shaft according to claim 1 or 2, characterized in that, The drainage holes are arranged circumferentially along the flange body.

7. The flange mounting waterproof structure for the drive shaft according to claim 6, characterized in that, The drain hole is set at an angle downwards.

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