CN217692889U

CN217692889U - Motor casing structure and motor

Info

Publication number: CN217692889U
Application number: CN202221500202.9U
Authority: CN
Inventors: 肖平; 潘勇; 郑青; 周乔
Original assignee: Jingzhou Jiuyang Automobile Parts Co ltd
Current assignee: Jingzhou Jiuyang Automobile Parts Co ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2022-10-28
Anticipated expiration: 2032-06-15

Abstract

The utility model relates to a motor casing structure and a motor, wherein the motor casing structure comprises a casing, a first annular sealing element and a buckle structure; the outer shell is provided with a mounting cavity used for mounting a motor shaft, the inner wall of the mounting cavity is provided with a shaft hole in a penetrating manner, and the shaft hole is used for the motor shaft to penetrate through; the first annular sealing element is arranged on one side of the shaft hole close to the mounting cavity and is used for being annularly arranged on the periphery of the motor shaft; the buckle structure is arranged between the shell and the first annular sealing element and used for limiting the first annular sealing element to be separated from the shell. This scheme avoids the motor shaft to drive first annular sealing member and breaks away from the shell when stretching into or breaking away from the shaft hole. Therefore, when the motor is assembled, the first annular sealing element does not need to be fixed by matched equipment when the motor shaft extends into the shaft hole, and the cost is saved; and when the motor shaft is taken out in the maintenance, first annular sealing member also is difficult for breaking away from, effectively avoids first annular sealing member to install again, improves the convenience.

Description

Motor casing structure and motor

Technical Field

The utility model relates to an electrical equipment technical field especially relates to a motor casing structure and motor.

Background

An Electric machine (Electric machine), commonly called "motor", refers to an electromagnetic device that converts or transmits Electric energy according to the law of electromagnetic induction. The motor is widely applied in life, and when the existing equipment provided with the motor runs in rainy days or wading road sections, rainwater can seep into the motor from gaps at the joint of the end covers or a motor shaft hole, so that the motor is adversely affected. Currently, a sealing ring is generally arranged at a gap and a motor shaft hole to prevent external water from permeating.

For example, patent CN 101982925A discloses a sealless pump and its special motor, wherein an annular groove is arranged on the inner wall of a motor shaft hole of a pump impeller (similar to an outer end cover) to mount an O-ring seal, so as to isolate from the outside and ensure the functions of air tightness and water resistance. However, because the inner diameter of the sealing ring is generally smaller than the diameter of the motor shaft, when the sealing ring is installed through the annular groove, the motor shaft can interfere with the sealing ring when extending into the shaft hole or separating from the shaft hole, and then the O-shaped ring is driven to separate from the annular groove, so that auxiliary installation of matched equipment is needed; and the O-shaped ring needs to be reinstalled after being driven by the motor shaft to be separated in maintenance, which is relatively complicated.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for a motor casing structure and a motor, which are used to solve the problem in the prior art that when a motor shaft extends into a shaft hole or is separated from the shaft hole, the motor shaft interferes with a sealing ring, and then drives an O-ring to be separated from an annular groove, so that auxiliary installation of supporting equipment is required; and the O-shaped ring is required to be reinstalled after being driven by the motor shaft to be separated in maintenance, which is a relatively complex technical problem.

The utility model provides a motor casing structure, this motor casing structure includes:

the motor shaft mounting structure comprises a shell, a shaft sleeve and a shaft sleeve, wherein a mounting cavity is formed in the shell and used for mounting a motor shaft, a shaft hole penetrates through the inner wall of the mounting cavity and is used for the motor shaft to penetrate through;

the first annular sealing element is arranged on one side, close to the mounting cavity, of the shaft hole and is used for being arranged on the periphery of the motor shaft in an annular mode; and (c) a second step of,

and the buckling structure is arranged between the shell and the first annular sealing element and used for limiting the first annular sealing element to be separated from the shell.

Optionally, a clamping hole is further formed through the inner wall of the mounting cavity, and the clamping hole is located beside the shaft hole;

buckle structure includes main part and spacing portion, the main part including connect in the link of first annular sealing member and wear to locate the spacing end in card hole, spacing portion locates spacing end, and certainly spacing end is close to the direction in card hole is leaned out and is extended the setting, with the outside looks butt of shell limits the main part breaks away from card hole.

Optionally, a through hole penetrates through the first annular sealing element in the direction close to the shaft hole, the connecting end penetrates through the through hole, a stop block is arranged at the connecting end, and the cross-sectional sizes of the through hole and the stop block are sequentially increased.

Optionally, the motor casing structure further includes a cover body, and the cover body is covered on the outer side of the casing corresponding to the position of the clamping hole to form a cavity with the outer side of the casing;

the limiting part is positioned in the cavity.

Optionally, the limiting end is provided with an annular skirt, the annular skirt is located between the limiting portion and the clamping hole, the annular skirt is covered on one end, far away from the mounting cavity, of the clamping hole, and the annular skirt is made of rubber.

Optionally, the housing comprises:

the motor shaft mounting device comprises a shell, a motor shaft and a motor shaft, wherein the shell is provided with an accommodating cavity with an opening at one side, and a mounting seat is formed at the bottom of the accommodating cavity and used for mounting the motor shaft; and the number of the first and second groups,

the cover body covers the opening of the accommodating cavity, so that the cover body and the shell body jointly enclose and form the mounting cavity, and the shaft hole is formed in the cover body.

Optionally, the cover body includes an end cover and an extension portion extending from the periphery of the end cover toward the same side, and one end of the extension portion, which is far away from the end cover, is connected to the opening of the accommodating cavity.

Optionally, two partition plates are convexly arranged on the inner side of the extending portion, the two partition plates are arranged at intervals along the direction far away from the end cover, so that a mounting groove is formed between the two partition plates and the extending portion, and the mounting groove is used for mounting a carbon brush.

Optionally, an elastic piece is arranged at the bottom of the mounting groove and used for driving the carbon brush to elastically move in a direction away from the bottom of the mounting groove.

Furthermore, the utility model also provides a motor, it includes:

a motor shaft; and the number of the first and second groups,

in the motor casing structure according to any one of the above aspects, the motor shaft is disposed in the mounting cavity, one end of the motor shaft extends out of the mounting cavity from the shaft hole, and the first annular sealing member is annularly disposed on the outer periphery of the motor shaft.

Compared with the prior art, the utility model provides a motor casing structure is close to one side of installation cavity through locating first annular sealing member in the shaft hole to couple together first annular sealing member and shell through buckle structure, avoid the motor shaft to drive first annular sealing member and break away from the shell when stretching into or breaking away from the shaft hole. Therefore, when the motor is assembled, the first annular sealing element does not need to be fixed by matched equipment when the motor shaft extends into the shaft hole, and the cost is saved; and when the motor shaft is taken out in the maintenance, first annular sealing member also is difficult for breaking away from, effectively avoids first annular sealing member to install again, improves the convenience.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, and to implement the technical means according to the content of the description, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic half-sectional view of an embodiment of an electric machine provided by the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is a schematic structural view of the snap structure of FIG. 2;

FIG. 4 is an enlarged schematic view at B of FIG. 1;

fig. 5 is a schematic view of the overall structure of the motor in fig. 1.

Description of reference numerals:

100-motor, 1-shell, 1 a-installation cavity, 1 b-shaft hole, 1 c-clamping hole, 11-shell, 111-installation seat, 112-waveform gasket, 12-cover body, 121-end cover, 122-extension part, 123-clapboard, 123 a-installation groove, 124-elastic part, 125-commutator, 13-cover body, 13 a-cavity, 2-first annular sealing element, 2 a-through hole, 3-clamping structure, 31-main body part, 311-connection end, 312-limit end, 32-limit part, 33-stop block, 34-annular skirt, 4-second annular sealing element, 5-motor shaft, 6-carbon brush, 7-bearing, 8-rotor coil and 9-magnetic shoe.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.

Referring to fig. 1 to 3, the motor casing structure includes a casing 1, a first annular sealing element 2 and a fastening structure 3; the outer shell 1 is provided with a mounting cavity 1a, the mounting cavity 1a is used for mounting a motor shaft, the inner wall of the mounting cavity 1a is provided with a shaft hole 1b in a penetrating manner, and the shaft hole 1b is used for the motor shaft to penetrate through; the first annular sealing piece 2 is arranged on one side of the shaft hole 1b close to the installation cavity 1a and used for being annularly arranged on the periphery of the motor shaft; the snap structure 3 is disposed between the housing 1 and the first annular sealing member 2, and is used for limiting the first annular sealing member 2 from being separated from the housing 1.

This scheme is through locating first annular seal spare 2 one side that shaft hole 1b is close to installation cavity 1a to couple together first annular seal spare 2 and shell 1 through buckle structure 3, avoid the motor shaft to drive first annular seal spare 2 and break away from shell 1 when stretching into or breaking away from shaft hole 1b. Therefore, when the motor is assembled, the first annular sealing element 2 does not need to be fixed by matching equipment when the motor shaft extends into the shaft hole 1b, and the cost is saved; and when the motor shaft was taken out in the maintenance, first annular sealing member 2 also was difficult for breaking away from, effectively avoided first annular sealing member 2 to install again, improved the convenience.

Furthermore, a clamping hole 1c is formed in the inner wall of the mounting cavity 1a in a penetrating manner, the clamping hole 1c is located on the side of the shaft hole 1b, and the first annular sealing element 2 is arranged at one end, close to the mounting cavity 1a, of the clamping hole 1c in a covering manner; the fastening structure 3 includes a main body 31 and a limiting portion 32, the main body 31 includes a connecting end 311 connected to the first annular sealing element 2 and a limiting end 312 penetrating the clamping hole 1c, the limiting portion 32 is disposed at the limiting end 312, and the limiting end 312 extends obliquely outward from the direction close to the clamping hole 1c to abut against the outer side of the housing 1, so as to limit the main body 31 to separate from the clamping hole 1c.

In this embodiment, the first annular sealing element 2 is fixed at one end of the clamping hole 1c close to the installation cavity 1a through the connecting end so as to cover the clamping hole 1c; meanwhile, the main body part 31 is limited by the limiting part 32 to be separated from the clamping hole 1c, so that the first annular sealing element 2 is fixed with the shell 1, and the first annular sealing element 2 is prevented from being separated from the shell 1. In addition, because spacing portion 32 leans out the setting from the direction that spacing end 312 is close to card hole 1c for when stretching into card hole 1c with spacing end 312 from the one end that card hole 1c is close to installation cavity 1a, spacing portion 32's free end can be to the direction activity that is close to spacing end 312, so that stretch into card hole 1c with spacing end 312 in, one side of installation cavity 1a is kept away from to card hole 1c until spacing portion 32 activity, make buckle structure 3's installation more convenient.

It should be noted that, in the present embodiment, the limiting portion 32 is made of a plastic material, so that the limiting portion 32 is contracted in the fastening hole 1c, and is expanded after extending out of the fastening hole 1c, and cooperates with the fastening hole 1c to realize a limiting function. Specifically, the included angle alpha between the limiting part 32 and the main body part 31 satisfies that alpha is more than or equal to 20 degrees and less than or equal to 30 degrees. Thus, even if the limiting portion 32 penetrates through the clamping hole 1c, the limiting portion 32 can be effectively prevented from being separated after penetrating through the clamping hole 1c, the limiting portion 32 is stably abutted against the outer side of the shell 1, and the first annular sealing element 2 is prevented from being separated from the shell 1. Preferably, α is 25 °.

Furthermore, the first annular sealing element 2 is provided with a through hole 2a along the direction close to the shaft hole 1b, the connecting end is provided with the through hole 2a, the connecting end 311 is provided with the stop block 33, and the cross-sectional dimensions of the through hole 2a and the stop block 33 are sequentially increased. According to the scheme, the section size of the stop block 33 is set to be larger than that of the through hole 2a, so that the first annular sealing piece 2 is limited to be separated from the main body part 31, the structure is simple and reliable, and the cost is saved.

Furthermore, in order to improve the aesthetic appearance, in this embodiment, the motor casing structure further includes a cover 13, where the cover 13 is covered on the outer side of the casing 1 corresponding to the position of the fastening hole 1c to form a cavity 13a with the outer side of the casing 1; the stopper 32 is located in the cavity 13a. According to the scheme, the cover body 13 is arranged to form the cavity 13a for accommodating the limiting part 32 with the shell 1, so that the limiting part 32 is prevented from being exposed outside to influence the appearance; meanwhile, the cover body 13 is arranged to prevent one end of the clamping hole 1c far away from the installation cavity 1a from being exposed outside, and sealing performance is improved.

In addition, in order to reduce the risk that the end of the locking hole 1c far away from the mounting cavity 1a is exposed to the outside, in this embodiment, the limiting end 312 is provided with an annular skirt 34, the annular skirt 34 is located between the limiting portion 32 and the locking hole 1c, so as to cover the end of the locking hole 1c far away from the mounting cavity 1a, and the material of the annular skirt is rubber. So, further improved card hole 1c and kept away from the leakproofness of installation cavity 1a one end, simultaneously, annular skirt 34 is the rubber setting, can pass in and out card hole 1c smoothly, does not influence buckle structure 3's normal use.

Further, referring to fig. 1 and 5, the housing 1 includes a casing 11 and a cover 12; the housing 11 has a containing cavity with an opening at one side, a mounting seat 111 is formed at the bottom of the containing cavity, and the mounting seat 111 is used for mounting a motor shaft; the cover body 12 covers the opening of the accommodating cavity to form an installation cavity 1a together with the shell body 11, and the shaft hole 1b is formed in the cover body 12.

In this embodiment, when the cover 12 is disposed at the opening of the accommodating cavity, only one connecting gap exists between the cover 12 and the accommodating cavity in the entire casing 1 of the motor 100, so that the probability of external water entering the motor 100 is reduced; simultaneously, still can set up second annular seal 4 in lid 12 and the joint gap department that holds between the chamber, cut off the external and installation cavity 1a between the contact, further improve the waterproof performance of this scheme motor casing structure, reduce the infiltration probability of external water, extension motor 100 life.

It is understood that the installation form of the installation seat 111 is not limited, and may be a boss formed by protruding inward on the bottom wall of the accommodation cavity, or may be other forms. In this embodiment, the mounting seat 111 is disposed as a concave groove formed at the bottom of the accommodating cavity. In order to improve the electric energy conversion efficiency of the motor shaft 5, in the present embodiment, the bearings 7 are disposed in the mounting seat 111 and on the side of the first annular sealing member 2 away from the cover 12.

The form of arrangement of the first annular seal 2 and the second annular seal 4 is not limited as long as the sealing performance can be achieved. In order to maintain good sealing performance of the motor 100 in extreme environments, in the present embodiment, the first annular sealing element 2 is a high-low temperature resistant sealing ring. The high-temperature and low-temperature resistant sealing ring is not easy to deform in high-temperature and low-temperature environments, so that the connection gap and the sealing of the shaft hole 1b can be reliably protected. Specifically, in the scheme, the high-low temperature resistant sealing ring is made of ethylene propylene diene monomer rubber, silicon rubber or fluororubber. The preferred silicon rubber can keep good elasticity in the environment of-80-280 ℃, is not easy to age, is low in price and reduces the cost.

Further, in the present embodiment, the second annular seal 4 is a double lip type oil seal. This scheme is with the help of two lip type oil seals, when falling this, guarantees the dustproof and waterproof function of motor casing 11 structure. It is understood that the material of the double-lip oil seal is not limited, and may be silicone rubber, nitrile rubber, polyacrylate rubber, or polytetrafluoroethylene.

In order to improve the electric energy conversion efficiency of the motor shaft 5, in the embodiment, the waveform gasket 112 is disposed on one side of the mounting seat 111 close to the accommodating cavity, and a certain gap is formed between the motor shaft 5 and the mounting seat 111 by utilizing the ripples of the waveform gasket 112, so that the friction between the motor shaft 5 and the housing 11 is reduced, and the electric energy conversion efficiency is improved.

Further, the cover 12 includes an end cap 121 and an extending portion 122 extending from a periphery of the end cap 121 toward the same side, and an end of the extending portion 122 away from the end cap 121 is connected to the opening of the accommodating cavity. In this embodiment, the end cap 121 and the extending portion 122 cooperate to form an auxiliary cavity communicating with the accommodating cavity, so as to increase the space of the inner cavity of the housing 1 and improve the space utilization. It is understood that the connection form between the extension portion 122 and the shell 11 is not limited, and in the present embodiment, the extension portion 122 and the shell 11 are connected by screwing.

Further, referring to fig. 4, two partition boards 123 are convexly formed on the inner side of the extending portion 122, the two partition boards 123 are spaced apart from the end cap 121 to form a mounting groove 123a with the extending portion 122, and the mounting groove 123a is used for mounting the carbon brush 6. In the scheme, the carbon brush 6 is installed by arranging the installation groove 123a, so that the carbon brush 6 is prevented from moving in the direction close to and far away from the end cover 121, and the stability of installing the carbon brush 6 is improved; meanwhile, the carbon brush 6 is arranged at the position of the cover body 12 to improve the space utilization rate of the installation cavity 1a, so that the number of turns of the rotor coil 8 or the volume of the magnetic shoe 9 is properly improved, and the electric energy conversion efficiency of the motor shaft 5 is further improved. It will be appreciated that, in one embodiment, the baffle 123 extends circumferentially of the extension 122 to be annularly disposed.

Specifically, in order to enable the carbon brush 6 to be always in contact with the motor shaft 5. In this embodiment, the elastic member 124 is disposed at the bottom of the mounting groove 123a, and the elastic member 124 is used to drive the carbon brush 6 to move elastically in a direction away from the bottom of the mounting groove 123 a. Therefore, when the carbon brush 6 is in contact with the motor shaft 5 for a long time to cause abrasion, the carbon brush 6 can move in a direction close to the motor shaft 5 under the driving of the elastic piece 124, so that the carbon brush 6 can be continuously in contact with the motor shaft 5, and the normal operation of the motor 100 is ensured. In the present embodiment, the elastic member 124 is provided as a compression spring.

Furthermore, the utility model provides a motor 100, it includes motor shaft 5 and as above arbitrary one's motor casing structure, and in installation cavity 1a was located to motor shaft 5, and one end stretched out in installation cavity 1a from shaft hole 1b, and the periphery of motor shaft is located to first annular seal spare 2 rings. It should be noted that, the detailed structure of the motor casing structure of the motor 100 may refer to the above-mentioned embodiment of the motor casing structure, and is not described herein again; because the utility model discloses an above-mentioned motor casing structure has been used in motor 100, consequently, the utility model discloses motor 100's embodiment includes all technical scheme of the whole embodiments of above-mentioned motor casing structure, and the technological effect that reaches is also identical, and is no longer described herein.

Further, in order to improve the output stability of the motor shaft 5, in this embodiment, the motor 100 further includes a commutator 125, the commutator 125 is disposed on one side of the cover 12 close to the mounting seat 111, and one end of the motor shaft 5 close to the cover 12 sequentially penetrates through the commutator 125 and the shaft hole 1b. That is, in this scheme, locate the output of motor shaft 5 with commutator 125, make motor shaft 5 can continue to rotate on the one hand, on the other hand also can avoid motor shaft 5 to a certain extent at the rotation in-process lateral deviation, improves motor shaft 5 and rotates ground stability.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. A motor casing structure, characterized in that it includes:

the motor shaft mounting structure comprises a shell, a shaft hole and a shaft sleeve, wherein a mounting cavity is formed in the shell and used for mounting a motor shaft, and the shaft hole is formed in the inner wall of the mounting cavity in a penetrating manner and used for the motor shaft to penetrate through;

the first annular sealing element is arranged on one side, close to the mounting cavity, of the shaft hole and is used for being arranged on the periphery of the motor shaft in an annular mode; and the number of the first and second groups,

and the buckle structure is arranged between the shell and the first annular sealing element and used for limiting the first annular sealing element to be separated from the shell.

2. The motor casing structure of claim 1, wherein a clamping hole is further formed through the inner wall of the mounting cavity, the clamping hole is located beside the shaft hole, and the first annular sealing element is covered at one end, close to the mounting cavity, of the clamping hole;

the buckle structure includes main part and spacing portion, the main part including connect in the link of first annular sealing member and wear to locate the spacing end in card hole, spacing portion is located spacing end, and certainly spacing end is close to the direction in card hole is leaned out and is extended the setting, with the outside looks butt of shell, restriction the main part breaks away from card hole.

3. The motor casing structure of claim 2, wherein a through hole penetrates through the first annular sealing element in a direction close to the shaft hole, the connecting end penetrates through the through hole, a stop block is arranged at the connecting end, and the cross-sectional dimensions of the through hole and the stop block are sequentially increased.

4. The motor casing structure of claim 2, further comprising a cover body, wherein the cover body is covered on the outer side of the casing corresponding to the position of the clamping hole to form a cavity with the outer side of the casing;

the limiting part is positioned in the cavity.

5. The motor casing structure of claim 2, wherein the limiting end is provided with an annular skirt, the annular skirt is located between the limiting portion and the clamping hole to cover an end of the clamping hole far away from the mounting cavity, and the annular skirt is made of rubber.

6. The motor casing structure of claim 1, wherein the housing comprises:

the motor shaft fixing device comprises a shell, a motor shaft and a fixing device, wherein the shell is provided with an accommodating cavity with an opening at one side, and a mounting seat is formed at the bottom of the accommodating cavity and used for mounting the motor shaft; and (c) a second step of,

7. The motor casing structure of claim 6, wherein the cover comprises an end cover and an extension portion extending from the periphery of the end cover toward the same side, and one end of the extension portion, which is far away from the end cover, is connected to the opening of the accommodating cavity.

8. The motor casing structure of claim 7, wherein two partition plates are convexly formed on the inner side of the extension part, and the two partition plates are spaced apart from the end cover in a direction away from the end cover to form a mounting groove with the extension part, and the mounting groove is used for mounting a carbon brush.

9. The motor casing structure of claim 8, wherein the bottom of the mounting groove is provided with a resilient member for driving the carbon brush to move resiliently in a direction away from the bottom of the mounting groove.

10. An electric machine, characterized in that it comprises:

a motor shaft; and the number of the first and second groups,

the motor casing structure of any one of claims 1 to 9, wherein the motor shaft is disposed in the mounting cavity with one end protruding from the shaft hole in the mounting cavity, and the first annular seal member is disposed around an outer periphery of the motor shaft.