CN219875285U

CN219875285U - Waterproof structure of motor and motor

Info

Publication number: CN219875285U
Application number: CN202321200847.5U
Authority: CN
Inventors: 黄洪岳; 吴卫平; 臧曙光; 杨�一
Original assignee: Aneida Drive Technology Shanghai Co ltd
Current assignee: Aneida Drive Technology Shanghai Co ltd
Priority date: 2023-05-17
Filing date: 2023-05-17
Publication date: 2023-10-20
Anticipated expiration: 2033-05-17

Abstract

The utility model provides a waterproof structure of a motor and the motor, which comprises a bushing, a framework oil seal, an end cover, a waterproof bearing, an O-shaped ring and a shaft, wherein the end cover is provided with a through hole, and one end of the shaft penetrates through the through hole and extends to the outer side of the end cover; the bushing and the framework oil seal are sequentially sleeved on the shaft, the outer ring of the framework oil seal is fixedly connected with the end cover, the inner ring of the framework oil seal is in tight fit with the bushing, and the inner ring of the bushing is sealed with the shaft through an O-shaped ring; the waterproof bearing sleeve is arranged on the shaft and positioned at the inner side of the bushing, the outer ring of the waterproof bearing is fixedly connected with the end cover, and the inner ring of the waterproof bearing is sealed with the shaft through an O-shaped ring. According to the utility model, the shaft, the O-shaped ring, the bushing and the framework oil seal are matched to form a first waterproof structure, mud water is blocked outside, and the shaft, the O-shaped ring and the waterproof bearing are matched to form a second waterproof structure, so that mud water is further prevented from penetrating into the motor, the motor is waterproof sealed through double waterproofing, and the waterproof performance of the motor is improved.

Description

Waterproof structure of motor and motor

Technical Field

The utility model relates to the technical field of waterproof structures, in particular to a waterproof structure of a motor and the motor.

Background

At present, the electric bicycle is convenient to travel, is a necessary transportation means for many families, and the motor is one of important parts, like a heart is for people. The waterproof performance is an indispensable performance index of the motor, and influences the service life and the safety of the motor.

The prior art publication No. CN102570686A discloses a waterproof structure of a motor, which comprises a motor end cover (1) and a rotating shaft (3) penetrating out of a through hole (21) of a bearing chamber (2) on the end cover (1), wherein a bearing (5) is arranged in the bearing chamber (2) and supports the rotating shaft (3), a waterproof cover (4) is arranged on the motor rotating shaft (3) and covers the outside of the bearing chamber (2), a boss (6) protrudes outwards from the top surface of the bearing chamber (2), the boss (6) stretches into the waterproof cover (4) and is matched with the motor rotating shaft (3), a water blocking ring (7) is arranged at the position above the top of the boss (6) and inside the waterproof cover (4), and the water blocking ring (7) is sleeved on the motor rotating shaft (3).

When the bicycle is ridden in a rainy day, the motor can be wetted or splashed with a large amount of muddy water, so that the waterproof performance is very important, and the service life and the safety of the motor are related. The motor leaks mainly by wheel hub and end cover and both ends axle department, and the wheel hub is static seal with the end cover between, and it is easy to seal, effectual. The connection parts of the peripheral shafts at the two ends are dynamic seals, so that the sealing is relatively difficult; the improper seal often fails after a period of operation.

The waterproof performance of the motor is required to be improved, and the motor is generally divided into two parts, namely, an internal circuit is waterproof, waterproof glue is coated on the PCB, and the PCB is prevented from being burnt after water enters the motor; the external waterproof is mainly waterproof to the joint position of the two shells through the O-shaped sealing ring, and dustproof and waterproof to the joint position of the shaft and the shells through the oil seal.

Therefore, the inventor considers that the sealing structure between the end cover and the shaft in the prior art is not perfect, and needs to provide a waterproof structure of the motor, which has the advantages of simple structure, convenient assembly and good sealing effect.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a waterproof structure of a motor and the motor.

According to the waterproof structure of the motor provided by the utility model, the waterproof structure comprises the following components: the waterproof device comprises a bushing, a framework oil seal, an end cover, a waterproof bearing, an O-shaped ring and a shaft, wherein a through hole is formed in the end cover, and one end of the shaft penetrates through the through hole and extends to the outer side of the end cover; the bushing and the framework oil seal are sequentially sleeved on the shaft, the outer ring of the framework oil seal is fixedly connected with the end cover, the inner ring of the framework oil seal is in tight fit with the bushing, the inner ring of the bushing is sealed with the shaft through the O-shaped ring, and a first waterproof structure is formed by the shaft, the O-shaped ring, the bushing and the framework oil seal in a matched mode; the waterproof bearing is sleeved on the shaft and is positioned on the inner side of the bushing, the outer ring of the waterproof bearing is fixedly connected with the end cover, the inner ring of the waterproof bearing is sealed with the shaft through the O-shaped ring, and the shaft, the O-shaped ring and the waterproof bearing are matched to form a second waterproof structure.

Preferably, the through hole on the end cover is positioned at the center of the end cover, and the bushing, the framework oil seal, the end cover, the waterproof bearing, the O-shaped ring and the shaft are all arranged with the same central shaft.

Preferably, the waterproof bearing is in interference fit with the end cap.

Preferably, the framework oil seal is in interference fit with the end cover.

Preferably, the through hole is a step-shaped through hole, comprising a small through hole at the outer side and a large through hole at the inner side, the waterproof bearing is arranged in the large through hole, the length of the waterproof bearing is matched with that of the large through hole, the bushing and the framework oil seal are arranged in the small through hole, and the length of the framework oil seal is matched with that of the small through hole.

Preferably, the inner ring and the outer ring of the bushing are smooth cylindrical surfaces, a bulge is formed at one end of the bushing, which is far away from the waterproof bearing, and angles on the bushing are all inverted obtuse angles.

Preferably, the shaft end is provided with a thread and the thread extends to the connection with the bushing.

Preferably, an annular groove is formed in the shaft, and the O-shaped ring is embedded in the groove.

Preferably, the number of the O-rings is not less than two.

According to the motor provided by the utility model, the waterproof structure of the motor is adopted on both sides of the end cover outside the motor.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, a first waterproof structure is formed by matching the shaft, the O-shaped ring, the bushing and the framework oil seal, muddy water is blocked outside, and a second waterproof structure is formed by matching the shaft, the O-shaped ring and the waterproof bearing, so that muddy water is further prevented from penetrating into the motor; through the reasonable type of selecting of skeleton oil blanket, through the reasonable setting of O type circle and epaxial annular groove's size, waterproof sealing is carried out to the motor through dual waterproof, improves motor waterproof performance.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is an exploded view of a structure embodying the present utility model for waterproofing a motor;

fig. 2 is a cross-sectional view of a structure embodying the present utility model for preventing water of a motor.

Reference numerals:

bush 1 skeleton oil blanket 2 end cover 3

Waterproof bearing 4 and O type ring 5 shaft 6

Detailed Description

The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.

Example 1

As shown in fig. 1 and 2, a waterproof structure of a motor according to the present utility model includes: the novel oil seal device comprises a bushing 1, a framework oil seal 2, an end cover 3, a waterproof bearing 4, an O-shaped ring 5 and a shaft 6, wherein a through hole is formed in the end cover 3, and one end of the shaft 6 penetrates through the through hole and extends to the outer side of the end cover 3; the bushing 1 and the framework oil seal 2 are sequentially sleeved on the shaft 6, the outer ring of the framework oil seal 2 is fixedly connected with the end cover 3, the inner ring of the framework oil seal 2 is in tight fit with the bushing 1, the inner ring of the bushing 1 is sealed with the shaft 6 through an O-shaped ring 5, and a first waterproof structure is formed by the shaft 6, the O-shaped ring 5, the bushing 1 and the framework oil seal 2 in a matched mode; the waterproof bearing 4 is sleeved on the shaft 6 and is positioned on the inner side of the bushing 1, the outer ring of the waterproof bearing 4 is fixedly connected with the end cover 3, the inner ring of the waterproof bearing 4 is sealed with the shaft 6 through the O-shaped ring 5, and the shaft 6, the O-shaped ring 5 and the waterproof bearing 4 are matched to form a second waterproof structure.

When the bicycle is ridden in a rainy day, the motor can be wetted or splashed with a large amount of muddy water, so that the waterproof performance is very important, the service life and the safety of the motor are related, and the waterproof performance is invalid after the motor is often operated for a period of time due to improper sealing. According to the utility model, a first waterproof structure is formed by matching the shaft 6, the O-shaped ring 5, the bushing 1 and the framework oil seal 2, muddy water is blocked outside, and a second waterproof structure is formed by matching the shaft 6, the O-shaped ring 5 and the waterproof bearing 4, so that muddy water is further prevented from penetrating into the motor.

The through hole on the end cover 3 is positioned at the center of the end cover 3, and the bushing 1, the framework oil seal 2, the end cover 3, the waterproof bearing 4, the O-shaped ring 5 and the shaft 6 are all arranged with the center shaft. The through hole is the echelonment through-hole, including the little through-hole in outside and the big through-hole of inboard, waterproof bearing 4 sets up in big through-hole, and waterproof bearing 4's length and big through-hole assorted, bush 1 and skeleton oil blanket 2 set up in little through-hole, and the length and the little through-hole assorted of skeleton oil blanket 2.

The inner ring and the outer ring of the bushing 1 are smooth cylindrical surfaces, a bulge is formed at one end of the bushing 1 far away from the waterproof bearing 4, and angles on the bushing 1 are all inverted obtuse angles.

Preferably, the waterproof bearing 4 is in interference fit with the end cover 3, and the framework oil seal 2 is in interference fit with the end cover 3. During the assembly process, the waterproof bearing 4 is pressed into the end cover 3 in an interference manner, and the framework oil seal 2 is pressed into the end cover 3 in an interference manner. In other embodiments, the tight connection may be achieved by other means of connection, thereby achieving a sealed connection with the end cap 3.

The end of the shaft 6 is provided with threads, and the threads extend to the joint with the bushing 1, so that the fit between the part in threaded fit with the shaft 6 and the bushing 1 is ensured, and sealing is realized.

The shaft 6 is provided with an annular groove, and the O-shaped ring 5 is embedded in the groove. Further, the number of the O-shaped rings 5 is not less than two, and the specific number is determined according to practical application conditions. In general, two O-rings 5 are required, one for sealing the inner ring of the waterproof bearing 4 and the other for sealing the inner ring of the bushing 1.

According to the utility model, through reasonable shape selection of the framework oil seal 2, through reasonable size arrangement of the O-shaped ring 5 and the annular groove on the shaft 6, a first waterproof structure is formed through matching of the shaft 6, the O-shaped ring 5, the bushing 1 and the framework oil seal 2, and then a second waterproof structure is formed through matching of the shaft 6, the O-shaped ring 5 and the waterproof bearing 4, so that the motor is waterproof sealed through double waterproofing, and the waterproof performance of the motor is improved.

Example 2

According to the motor provided by the utility model, both sides of the end cover 3 outside the motor adopt the waterproof structure of the motor in the embodiment 1. According to the utility model, the space between the end cover 3 and the shaft 6 is sealed through the mutual matching among the shaft 6, the O-shaped ring 5, the waterproof bearing 4, the bushing 1 and the framework oil seal 2, so that an external water source cannot enter the motor, a double waterproof structure is adopted, the waterproof performance is stable and reliable, and the waterproof performance of the motor is ensured doubly.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the utility model and the features of the embodiments may be combined with each other arbitrarily without conflict.

Claims

1. A waterproof structure of a motor, comprising: the novel oil seal device comprises a bushing (1), a framework oil seal (2), an end cover (3), a waterproof bearing (4), an O-shaped ring (5) and a shaft (6), wherein a through hole is formed in the end cover (3), and one end of the shaft (6) penetrates through the through hole and extends to the outer side of the end cover (3);

the bushing (1) and the framework oil seal (2) are sequentially sleeved on the shaft (6), the outer ring of the framework oil seal (2) is fixedly connected with the end cover (3), the inner ring of the framework oil seal (2) is in tight fit with the bushing (1), the inner ring of the bushing (1) is sealed with the shaft (6) through the O-shaped ring (5), and a first waterproof structure is formed by the cooperation of the shaft (6), the O-shaped ring (5), the bushing (1) and the framework oil seal (2);

the waterproof bearing (4) is sleeved on the shaft (6) and is positioned on the inner side of the bushing (1), the outer ring of the waterproof bearing (4) is fixedly connected with the end cover (3), the inner ring of the waterproof bearing (4) is sealed with the shaft (6) through the O-shaped ring (5), and the shaft (6), the O-shaped ring (5) and the waterproof bearing (4) are matched to form a second waterproof structure.

2. The waterproof structure of the motor according to claim 1, wherein the through hole on the end cover (3) is positioned at the center of the end cover (3), and the bushing (1), the framework oil seal (2), the end cover (3), the waterproof bearing (4), the O-ring (5) and the shaft (6) are all arranged concentrically.

3. The waterproof structure of the motor according to claim 1, characterized in that the waterproof bearing (4) is in interference fit with the end cap (3).

4. The waterproof structure of the motor according to claim 1, wherein the framework oil seal (2) is in interference fit with the end cover (3).

5. The waterproof structure of the motor according to claim 1, wherein the through hole is a stepped through hole, comprising a small through hole on the outer side and a large through hole on the inner side, the waterproof bearing (4) is arranged in the large through hole, the length of the waterproof bearing (4) is matched with that of the large through hole, the bushing (1) and the framework oil seal (2) are arranged in the small through hole, and the length of the framework oil seal (2) is matched with that of the small through hole.

6. The waterproof structure of the motor according to claim 5, wherein the inner ring and the outer ring of the bushing (1) are smooth cylindrical surfaces, a protrusion is formed at one end of the bushing (1) away from the waterproof bearing (4), and angles on the bushing (1) are all inverted obtuse angles.

7. A waterproof construction of an electric motor according to claim 1, characterized in that the shaft (6) is provided with a screw thread at the end and that the screw thread extends to the connection with the bushing (1).

8. A waterproof structure of an electric motor according to claim 1, characterized in that the shaft (6) is provided with an annular groove, in which groove the O-ring (5) is embedded.

9. The waterproof structure of the motor according to claim 1, characterized in that the number of O-rings (5) is not less than two.

10. A motor, characterized in that both sides of an end cover (3) outside the motor adopt the waterproof structure of the motor according to any one of claims 1-9.