Waterproof motor shaft

Abstract

The utility model provides a waterproof motor shaft, and belongs to the technical field of motor shafts. A waterproof motor shaft comprises a motor shell, the motor shell is internally provided with a motor shaft, the motor shaft penetrates through the motor shell to the outside, and the outside part of the motor shaft is provided with a waterproof assembly; the waterproof assembly comprises a water blocking ring sleeved on the motor shaft, at least two extrusion blocks are arranged in the water blocking ring, more water flow can be thrown out through the peripheral side end face of the water blocking ring, the water flow is prevented from entering the motor, steam and the like which cannot be thrown out can be absorbed by the water absorption blocks, and then in the accelerated rotation process of the motor, the water flow is prevented from entering the motor. When the motor is started, the extrusion block stretches the compression spring through the centripetal force of the motor, so that the water absorption block is extruded, water absorbed in the water absorption block is extruded to be sprayed out of the water outlet, the water absorbed in the water absorption block can be automatically cleaned in the acceleration process of the motor every time the motor is started, and the waterproof effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of motor shafts, and in particular relates to a waterproof motor shaft. Background Art

[0002] The motor spindle is one of the essential components in a brushless DC motor. It supports and connects the motor's rotor, stator, motor housing, end cover and other components together.

[0003] The motor shaft is installed on the motor and is generally sealed by bearings. The seal at the bearings is not tight and the waterproof effect is poor, especially water vapor, which can easily enter the motor through the bearings, thereby accelerating the aging of the internal parts of the motor. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a waterproof motor shaft.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waterproof motor shaft, comprising a motor housing, wherein a motor shaft is installed in the motor housing, characterized in that: the motor shaft passes through the motor housing to the outside, and a waterproof component is installed on the outside part of the motor shaft;

[0006] The waterproof component includes a water-blocking ring sleeved on the motor shaft, at least two extrusion blocks are arranged inside the water-blocking ring, and the extrusion blocks are installed inside the water-blocking ring through compression springs. A water-absorbing block is also movably arranged inside the water-blocking ring to absorb moisture.

[0007] Optionally, at least two extrusion chambers are opened inside the water blocking ring, and an annular collecting chamber is also opened inside the water blocking ring. The collecting chamber and the extrusion chamber are connected through a connecting hole. A plurality of holes are opened on the outer periphery of the water blocking ring, and the holes are connected to the collecting chamber.

[0008] Optionally, the extrusion block and the water absorption block are both located in the extrusion cavity, and the end surface of the water blocking ring away from the motor housing is provided with at least two water outlets, the water outlets correspond to the extrusion cavity, and the water outlets are connected to the extrusion cavity.

[0009] Optionally, the water blocking ring is embedded in the side end surface of the motor housing and has an interference fit with the motor shaft.

[0010] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. Due to the setting of the waterproof component, more water can be thrown out through the outer peripheral side end face of the water blocking ring to prevent it from entering the motor, and the water vapor that cannot be thrown out will be absorbed by the water absorbing block. Then, during the acceleration of the motor, the centripetal force of the extrusion block stretches the compression spring to squeeze the water absorbing block, so that the water absorbed in the water absorbing block is squeezed and sprayed out from the water outlet. Moreover, each time the motor is started, the motor will automatically clean the water absorbed in the water absorbing block during the acceleration process to achieve a waterproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional diagram of the utility model.

[0013] Figure 2 It is the front view of the utility model.

[0014] Figure 3 For this utility model Figure 2 Cross-sectional view along the AA direction.

[0015] Figure 4 For this utility model Figure 2 Cross-sectional view along the BB direction.

[0016] 10. Motor shaft; 11. Motor housing; 12. Water blocking ring; 13. Extrusion block; 14. Collecting chamber; 15. Water absorption block; 16. Extrusion chamber; 17. Connecting hole; 18. Compression spring; 19. Water outlet. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention.

[0018] As shown in Figures 1-4, a waterproof motor shaft includes a motor housing 11, a motor shaft 10 is installed in the motor housing 11, and the characteristics are: the motor shaft 10 passes through the motor housing 11 to the outside, and the outer part of the motor shaft 10 is installed with a waterproof component;

[0019] The waterproof component includes a water-blocking ring 12 sleeved on the motor shaft 10, at least two extrusion blocks 13 are arranged inside the water-blocking ring 12, and the extrusion blocks 13 are installed inside the water-blocking ring 12 through compression springs 18. The water-blocking ring 12 is embedded in the side end surface of the motor housing 11 and has an interference fit with the motor shaft 10. A water-absorbing block 15 is also movably arranged in the water-blocking ring 12 to absorb moisture through the water-absorbing block 15.

[0020] At least two extrusion chambers 16 are provided inside the water blocking ring 12, and an annular collecting chamber 14 is also provided inside the water blocking ring 12. The collecting chamber 14 and the extrusion chamber 16 are connected through a connecting hole 17. A plurality of holes are provided on the outer periphery of the water blocking ring 12, and the holes are connected to the collecting chamber 14. The extrusion block 13 and the water absorption block 15 are both located in the extrusion chamber 16. At least two water outlets 19 are provided on the end surface of the water blocking ring 12 on one side away from the motor housing 11, and the water outlets 19 correspond to the extrusion chamber 16, and the water outlets 19 are connected to the extrusion chamber 16.

[0021] When in use, the waterproof component is sleeved on the motor shaft 10 so that it is in a position to be in contact with the motor housing 11. When the motor is stopped or in a stable rotation state, the external water flows through the motor housing 11 and flows on the water blocking ring 12, and the water flow will be thrown out during the rotation of the motor. When the water flow that cannot be thrown out, such as water vapor, will flow into the collecting chamber 14 through the holes on the water blocking ring 12, and then be absorbed by the water absorbing block 15 through the connecting hole 17. During the process of accelerating rotation of the motor, the squeezing block 13 stretches the compression spring 18 through its centripetal force, thereby squeezing the water absorbing block 15, so that the water absorbed in the water absorbing block 15 is squeezed, and the squeezing block 13 will pass over the connecting hole 17 after moving, so that the squeezed water in the water absorbing block 15 can only be sprayed out from the water outlet 19. Every time the motor is started, the motor will automatically clean the water absorbed in the water absorbing block 15 during the acceleration process, so as to achieve a waterproof effect.

[0022] Obviously, the described embodiments are only a part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A waterproof motor shaft, comprising a motor housing (11), wherein a motor shaft (10) is installed in the motor housing (11), characterized in that: The motor shaft (10) passes through the motor housing (11) to the outside, and a waterproof component is installed on the outside part of the motor shaft (10); The waterproof component comprises a water blocking ring (12) sleeved on the motor shaft (10), at least two extrusion blocks (13) are arranged inside the water blocking ring (12), the extrusion blocks (13) are installed inside the water blocking ring (12) through compression springs (18), and a water absorbing block (15) is also movably arranged inside the water blocking ring (12) to absorb moisture through the water absorbing block (15).

2. A waterproof motor shaft according to claim 1, characterized in that: At least two extrusion chambers (16) are provided inside the water blocking ring (12), and an annular collecting chamber (14) is also provided inside the water blocking ring (12); the collecting chamber (14) and the extrusion chamber (16) are connected via a connecting hole (17); a plurality of holes are provided on the outer periphery of the water blocking ring (12), and the holes are connected to the collecting chamber (14).

3. A waterproof motor shaft according to claim 2, characterized in that: The extrusion block (13) and the water absorption block (15) are both located in the extrusion cavity (16); the end surface of the water blocking ring (12) away from the motor housing (11) is provided with at least two water outlets (19); the water outlets (19) correspond to the extrusion cavity (16), and the water outlets (19) are in communication with the extrusion cavity (16).

4. The waterproof motor shaft according to claim 1, characterized in that: The water blocking ring (12) is embedded in the side end surface of the motor housing (11) and is interference fit with the motor shaft (10).

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