Waterproof device for motor rotating shaft

Abstract

The utility model discloses a motor rotating shaft waterproof device, which is characterized in that a second water retaining ring is arranged below a cover plate and is arranged at the edge of a shaft hole, a T-shaped second water retaining block is arranged at the inner side of the second water retaining ring and is arranged at the inner side of the edge of the shaft hole, and the lower part of a rotating shaft is sleeved with a first water retaining ring; according to the utility model, the plurality of water retaining rings are arranged to form a labyrinth-shaped structure, water can be prevented from being directly splashed into the labyrinth-shaped structure or particle dust can be prevented from being directly splashed into the labyrinth-shaped structure, the labyrinth-shaped structure can adapt to most motor using environments with low-grade waterproof requirements, and the service life of the sealing structure can be prolonged by adopting the water retaining rings; the trouble of frequently replacing a rubber sealing ring is saved, the maintenance is more convenient, the service life of the motor is prolonged, and the practicability and the applicability are better.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically a waterproof device for motor shafts. Background Technology

[0002] An electric motor (commonly known as a "motor") is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Currently, the shafts of most electric motors (those with low waterproofing requirements) are typically sealed with rubber sealing rings to prevent water splashes and dust particles from entering. However, traditional rubber sealing rings are prone to aging, leading to a decrease in their water and dust resistance. Direct water splashes or dust particles can easily reduce the motor's lifespan. To avoid this, the sealing rings need to be replaced promptly. For non-professionals, replacing the sealing rings is quite troublesome and inconvenient. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a waterproof device for motor shafts to address the shortcomings of the prior art, thereby solving at least one of the above-mentioned technical problems.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A waterproof device for a motor shaft includes a motor housing, a shaft mounted on the motor housing via a bearing, a rotor mounted on the shaft, a stator mounted on the inner side wall of the motor housing, a bearing seat at the bottom of the motor housing, a bearing cavity within the bearing seat, a bearing housed within the bearing cavity, and the bearing connected to the lower part of the shaft. A cover plate is connected to the bottom of the bearing seat, a shaft hole is provided in the middle of the cover plate, and the end of the shaft passes through the shaft hole. A second water-retaining ring is provided below the cover plate. The second water-blocking ring is disposed on the edge of the shaft hole. A T-shaped second water-blocking block is disposed on the inner side of the second water-blocking ring and is disposed on the inner side of the edge of the shaft hole. A first water-blocking ring is sleeved on the lower part of the rotating shaft. The first water-blocking ring is clearance-fitted with the shaft hole. A first water-blocking groove is disposed below the first water-blocking ring and is fitted with the upper part of the second water-blocking block. A third water-blocking ring is sleeved on the lower part of the rotating shaft and is disposed below the first water-blocking ring. A third water-blocking groove is disposed above the third water-blocking ring and is fitted with the lower part of the second water-blocking block.

[0005] Furthermore, a protruding first water-blocking block is provided below the first water-blocking ring. The first water-blocking block is located on one side of the first water-blocking groove, and the second water-blocking block is provided with a second water-blocking groove. The first water-blocking block and the second water-blocking groove cooperate with each other.

[0006] Furthermore, a positioning block is provided on the bottom side of the rotating shaft, and the positioning block cooperates with the upper part of the first water-blocking ring.

[0007] Furthermore, the first water-blocking ring has countersunk bolt holes on its side, and the rotating shaft has threaded holes. The first water-blocking ring is fixed to the rotating shaft by bolts.

[0008] Furthermore, the second water-retaining ring is provided with countersunk bolt holes, and the cover plate is provided with threaded holes. The second water-retaining ring is fixed to the cover plate by bolts.

[0009] Furthermore, the third water-blocking ring has countersunk bolt holes on its side, and the rotating shaft has threaded holes. The third water-blocking ring is fixed to the rotating shaft by bolts.

[0010] Furthermore, the cover plate is connected to the bottom of the bearing housing by fastening bolts.

[0011] The beneficial effects of this utility model are:

[0012] This utility model incorporates multiple water-blocking rings to form a labyrinthine structure, preventing water from splashing directly into the motor or dust particles. It is suitable for most motor applications with low-level waterproofing requirements. The water-blocking ring design extends the lifespan of the sealing structure, eliminating the hassle of frequently replacing rubber sealing rings. This makes maintenance more convenient and extends the motor's lifespan, demonstrating good practicality and applicability. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the water-retaining ring part of this utility model.

[0016] The attached diagram lists the components represented by each number as follows:

[0017] Motor housing 1; bearing seat 2; bearing cavity 21; rotating shaft 3; positioning block 31; cover plate 4; first water-blocking ring 5; first water-blocking groove 51; first water-blocking block 52; second water-blocking ring 6; second water-blocking block 61; second water-blocking groove 62; third water-blocking ring 7; third water-blocking groove 71. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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.

[0024] Example 1: See Figures 1 to 2 This is a schematic diagram of the various structures of this utility model, including a motor housing 1, a rotating shaft 3 mounted on the motor housing 1 via a bearing, a rotor mounted on the rotating shaft 3, a stator mounted on the inner side wall of the motor housing 1, a bearing seat 2 at the bottom of the motor housing 1, a bearing cavity 21 within the bearing seat 2, a bearing housed within the bearing cavity 21, and the bearing connected to the lower part of the rotating shaft 3, the bearing limiting the rotating shaft 3 to the motor housing 1, a cover plate 4 connected to the bottom of the bearing seat 2, a shaft hole in the middle of the cover plate 4 through which the end of the rotating shaft 3 passes, leaving space for mounting a water-blocking ring at one end of the rotating shaft 3 through the shaft hole, a second water-blocking ring 6 below the cover plate 4 and positioned at the edge of the shaft hole, and a T-shaped second water-blocking block 61 inside the second water-blocking ring 6. The inner side of the second water-blocking ring 6 is fitted with the inner side of the shaft 3 with a clearance, and the shaft 3 can rotate relative to the second water-blocking block 61. The lower part of the shaft 3 is fitted with the first water-blocking ring 5, which is fitted with the shaft hole with a clearance and can rotate relative to the shaft hole. The lower part of the first water-blocking ring 5 is provided with the first water-blocking groove 51, which is fitted with the upper part of the second water-blocking block 61 to form a Z-shaped structure, preventing water from splashing in and dust particles from entering. The lower part of the shaft 3 is fitted with the third water-blocking ring 7, which is located below the first water-blocking ring 5. The upper part of the third water-blocking ring 7 is provided with the third water-blocking groove 71, which is fitted with the lower part of the second water-blocking block 61 to form a Z-shaped structure, preventing water from splashing in and dust particles from entering.

[0025] Specifically, a protruding first water-blocking block 52 is provided below the first water-blocking ring 5. The first water-blocking block 52 is located on one side of the first water-blocking groove 51. The second water-blocking block 61 is provided with a second water-blocking groove 62. The first water-blocking block 52 and the second water-blocking groove 62 cooperate with each other. The protruding first water-blocking block 52 forms a Z-shaped structure, which can prevent water from directly entering from the joint between the second water-blocking ring 6 and the cover plate 4, further improving the performance of splash prevention and dust prevention.

[0026] Specifically, a positioning block 31 is provided on the bottom side of the rotating shaft 3. The positioning block 31 cooperates with the upper part of the first water-blocking ring 5 to facilitate positioning and assembly.

[0027] Specifically, the first water-blocking ring 5 has countersunk bolt holes on its side and threaded holes on its rotating shaft 3. The first water-blocking ring 5 is fixed to the rotating shaft 3 by bolts. The bolt fixing method is reliable and easy to disassemble.

[0028] Specifically, the second water-retaining ring 6 is provided with countersunk bolt holes, and the cover plate 4 is provided with threaded holes. The second water-retaining ring 6 is fixed to the cover plate 4 by bolts. The bolt fixing method is reliable and easy to disassemble.

[0029] Specifically, the third water-blocking ring 7 has countersunk bolt holes on its side and threaded holes on its rotating shaft 3. The third water-blocking ring 7 is fixed to the rotating shaft 3 by bolts. The bolt fixing method is reliable and easy to disassemble.

[0030] Specifically, the cover plate 4 is connected to the bottom of the bearing seat 2 by fastening bolts, and the bolt fixing method is reliable and easy to disassemble.

[0031] The principle of this utility model:

[0032] The first water-blocking ring 5, the third water-blocking ring 7, and the second water-blocking ring 6 cooperate to form a labyrinth-like structure. When the rotating shaft 3 rotates, it drives the first water-blocking ring 5 and the third water-blocking ring 7 to rotate, while the second water-blocking ring 6, which is fixed on the cover plate 4, remains stationary. When the rotating shaft 3 rotates, the second water-blocking block 61 slides relative to the first water-blocking groove 51 and the third water-blocking groove 71. When installing the first water-blocking ring 5 and the third water-blocking ring 7, a heating and pressing method and a cooling and shrinking method of the rotating shaft 3 are used to assemble the first water-blocking ring 5 and the third water-blocking ring 7, so that the first water-blocking ring 5 and the third water-blocking ring 7 fit tightly with the rotating shaft 3 to achieve a sealing function. Alternatively, a waterproof adhesive can be used to achieve a seal. When fixing the second water-blocking ring 6, a waterproof sealant is applied and then bolts are used to achieve a seal, preventing water from splashing in. With the above installation method, the first water-blocking ring 5, the third water-blocking ring 7, and the second water-blocking ring 6 cooperate to form a labyrinth-like structure, which can prevent water from splashing in directly or dust particles from entering, and can adapt to most low-level waterproof motor operating environments.

[0033] The above are merely optional embodiments of this utility model and are not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0034] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

Claims

1. A motor shaft waterproof device, comprising a motor shell (1), the motor shell (1) is provided with a rotating shaft (3) through a bearing, the rotating shaft (3) is provided with a rotor, the inner side wall of the motor shell (1) is provided with a stator, characterized in that: The bottom of the motor housing (1) is provided with a bearing seat (2), the bearing seat (2) is provided with a bearing cavity (21) inside, the bearing cavity (21) is provided with a bearing inside and the bearing is connected with the lower part of the rotating shaft (3), the bottom of the bearing seat (2) is connected with a cover plate (4), the middle part of the cover plate (4) is provided with a shaft hole and the end of the rotating shaft (3) is matched to pass through the shaft hole, the lower part of the cover plate (4) is provided with a second water retaining ring (6) and the second water retaining ring (6) is arranged at the edge of the shaft hole, the inner side of the second water retaining ring (6) is provided with a T-shaped second water retaining block (61) and the second water retaining block (61) is arranged at the inner side of the edge of the shaft hole, the lower part of the rotating shaft (3) is sleeved with a first water retaining ring (5), the first water retaining ring (5) is matched with the shaft hole gap, the lower part of the first water retaining ring (5) is provided with a first water retaining groove (51), the first water retaining groove (51) is matched with the upper part of the second water retaining block (61), the lower part of the rotating shaft (3) is sleeved with a third water retaining ring (7) and the third water retaining ring (7) is arranged below the first water retaining ring (5), the upper part of the third water retaining ring (7) is provided with a third water retaining groove (71), the third water retaining groove (71) is matched with the lower part of the second water retaining block (61).

2. The waterproofing device for a rotating shaft of an electric machine according to claim 1, characterized in that: The lower part of the first water retaining ring (5) is provided with a protruding first water retaining block (52), the first water retaining block (52) is arranged at one side of the first water retaining groove (51), the second water retaining block (61) is provided with a second water retaining groove (62), the first water retaining block (52) is matched with the second water retaining groove (62).

3. The water-proof device for the rotating shaft of an electric machine according to claim 1, characterized in that: The bottom side of the rotating shaft (3) is provided with a positioning block (31), the positioning block (31) is matched with the upper part of the first water retaining ring (5).

4. The water-proof device for the rotating shaft of an electric machine according to claim 1, characterized in that: The side of the first water retaining ring (5) is provided with a countersunk bolt hole, the rotating shaft (3) is provided with a threaded hole, and the first water retaining ring (5) is fixed on the rotating shaft (3) through bolts.

5. The water-proof device for the rotating shaft of an electric machine according to claim 1, characterized in that: The second water retaining ring (6) is provided with a countersunk bolt hole, the cover plate (4) is provided with a threaded hole, and the second water retaining ring (6) is fixed on the cover plate (4) through bolts.

6. The water-proof device for the rotating shaft of an electric machine according to claim 1, characterized in that: The side of the third water retaining ring (7) is provided with a countersunk bolt hole, the rotating shaft (3) is provided with a threaded hole, and the third water retaining ring (7) is fixed on the rotating shaft (3) through bolts.

7. The water-proof device for the rotating shaft of an electric machine according to claim 1, characterized in that: The cover plate (4) is connected with the bottom of the bearing seat (2) through fastening bolts.

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