CN218416125U

CN218416125U - Motor and rear end cover structure thereof

Info

Publication number: CN218416125U
Application number: CN202222702194.2U
Authority: CN
Inventors: 齐剑; 张艺
Original assignee: Suzhou Xinlian Motor Co ltd
Current assignee: Suzhou Xinlian Motor Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-01-31
Anticipated expiration: 2032-10-13

Abstract

The utility model discloses a motor and a rear end cover structure thereof, wherein the motor comprises an integrated shell, an installation cavity for installing a stator assembly and a rotor assembly is arranged in the integrated shell, an installation opening for installing the rear end cover is arranged at the rear end of the installation cavity corresponding to the integrated shell, and the rear end surface of the integrated shell is formed into a rear end cover installation surface; the rear end cover structure comprises a rear end cover body, wherein two end faces in the thickness direction of the rear end cover body are respectively implemented as a first end face and a second end face, the first end face is used for being attached and mounted with the sealing gasket, and the second end face is suitable for being attached to a mounting face of the rear end cover; the first encoder cavity is a cavity formed by the first end surface of the rear end cover body sinking towards the second end surface, and a through shaft hole for the rotating shaft to penetrate is formed in the middle of the bottom wall of the first encoder cavity. The first encoder containing cavity is formed in the rear end cover body, so that an encoder mounted on the rotating shaft is convenient to mount, a new encoder mounting structure is not needed, the structure is simplified, and the cost is reduced.

Description

Motor and rear end cover structure thereof

Technical Field

The utility model belongs to the technical field of the motor, concretely relates to motor and rear end cap structure thereof.

Background

The motor structure generally comprises a stator, and a shell of the stator of the motor is generally provided with a positioning groove and a positioning flange which are matched with an end cover; the front end cover of the motor is generally provided with a positioning flange and a positioning flange which are matched with the shell, and the positioning flange of the front end cover is generally provided with a sealing groove; the stator is connected with a positioning flange arranged on the front end cover in a positioning matching way through a positioning groove arranged on the shell; the sealing ring is placed in a sealing groove of a positioning flange of the front end cover; the stator fixing screw passes through a stator screw countersunk hole formed in the front end cover and is screwed in a stator fixing screw threaded hole formed in the shell of the stator. The stator fixing screw is screwed down to enable a positioning flange arranged on the shell of the stator to be tightly attached to a positioning flange arranged on the front end cover. The sealing ring is tightly attached to the sealing groove surface of the front end cover provided with the positioning flange and the positioning groove surface of the stator casing to form a sealing function. Therefore, the shell, the front end cover and the sealing ring of the stator need to be provided with a plurality of characteristics to form a front end structure of the stator, the shell and the end cover need to be respectively stretched or formed by die casting and respectively subjected to surface treatment, lathe processing, drilling and tapping processing, cleaning and other finish machining processes, a sealing element needs to be formed by a rubber die, and the structure process is complex. The motor is generally provided with a knocking warning mark label which is adhered to the outer side surface of the front end cover of the motor, so that the shaft is not allowed to be knocked when the warning motor is used, and internal parts of the motor are prevented from being damaged during knocking; the label needs to be customized for printing, gum and the like, and the label needs to be manually or automatically labeled by equipment during the production of the motor. In conclusion, the existing motor has a complex structure and higher production comprehensive cost.

In order to solve the above technical problems, it is necessary to develop an integrated housing. To facilitate the installation of the stator, one shaft end of the integrated housing is typically open at the rear end to facilitate the installation of the rear end cap, followed by the encoder, and finally the gasket and the rear cover after the stator is installed. The rear end cover of the motor is also an essential component of the motor structure. The existing motor rear end cover is usually formed by stretching a steel plate, die-casting aluminum alloy or injection molding plastic, and plays a role in protecting a motor encoder and providing certain protection level requirements independently. Different encoders are selected according to different application requirements to be matched with the motor for use, and as the encoders have an important position in motor control, a plurality of motor products are provided with the encoders and corresponding interfaces, and the motor encoder is a development trend of the motor industry. Motors are various in types and different in structure, so that the modes of mounting encoders on the motors are different. The existing motor is usually specially provided with an encoder mounting structure, so that the whole structure of the motor is complex or the size of the motor is larger, and the cost is higher. Therefore, there is a need for a motor back end cover for an integral housing that facilitates the installation of an encoder.

SUMMERY OF THE UTILITY MODEL

To at least one of the above-mentioned technical problem that exists, the utility model discloses the purpose is: a motor and a rear end cover structure thereof are provided.

The technical scheme of the utility model is that:

an object of the utility model is to provide a rear end cover structure of motor, the motor include an organic whole shell, the integrative shell has the installation cavity that supplies stator module and rotor subassembly installation and the installation cavity corresponds the rear end of an organic whole shell and has the installing port that supplies the rear end cover to install, the rear end face of the said organic whole shell forms the rear end cover installation face; the rear end cap structure includes:

the rear end cover comprises a rear end cover body, wherein two end faces in the thickness direction of the rear end cover body are respectively implemented as a first end face and a second end face, the first end face is used for being attached and mounted with a sealing gasket, and the second end face is suitable for being attached to a mounting face of the rear end cover;

the first encoder cavity is a cavity formed by the first end surface of the rear end cover body sinking towards the second end surface, and a through shaft hole for the rotating shaft to penetrate is formed in the middle of the bottom wall of the cavity.

Preferably, a plurality of protrusions protruding from the first end face in a direction away from the second end face are arranged on the first end face of the rear end cover body at intervals along the periphery of the opening of the first encoder cavity;

the outer wall surface of the opening of the bulge, which is far away from the first encoder containing cavity, is formed into an abutting surface which is attached to the inner ring of the sealing gasket.

Preferably, the plurality of protrusions are uniformly distributed around the periphery of the opening of the first encoder cavity at intervals.

Preferably, any of the protrusions is in the shape of a sector ring.

Preferably, the rear end cover body is square, and a first mounting hole for the gasket to be attached and fixed to the first end face of the rear end cover body and a second mounting hole for the rear end cover body to be fixed to the integrated shell are arranged at any angular position at intervals.

Preferably, a positioning hole for mounting the sealing gasket is further formed between the first mounting hole and the second mounting hole at any angular position.

Preferably, any angular position of the rear end cap body is depressed towards the center to form a notch.

Preferably, the rear end cover body further comprises a boss which is protruded and extended from the second end face to the direction departing from the first end face, and when the rear end cover is installed, the boss extends into the installation opening at the rear end of the integrated shell.

Another object of the present invention is to provide a motor, including the rear end cover structure of any one of the above.

Compared with the prior art, the utility model has the advantages that:

the utility model discloses a rear end cap structure, with the installation cavity tip opening cooperation installation that has installation cavity and the integrative shell of installation cavity tip open-ended, there is first encoder appearance chamber through the shaping on the rear end cap body, be convenient for install the encoder installation in the pivot, need not newly-increased encoder mounting structure, simplified the structure, the cost is reduced.

Drawings

The invention will be further described with reference to the following drawings and examples:

fig. 1 is a schematic structural view of a rear end cap structure of an electric machine according to an embodiment of the present invention, in which a first end face faces upward;

fig. 2 is an exploded view of the rear end cap structure and the sealing gasket of the motor according to the embodiment of the present invention;

fig. 3 is a schematic structural view of the rear end cover structure of the motor according to the embodiment of the present invention, which is separated from the rear cover after being engaged with the sealing gasket;

fig. 4 is a schematic view of a sectional structure of the assembled rear end cover structure, sealing gasket and rear cover of the motor in the embodiment of the present invention;

FIG. 5 is an enlarged view of a portion A of FIG. 4;

fig. 6 is a schematic structural view of the rear cover according to the embodiment of the present invention, in which the sealing surface faces the left front side;

fig. 7 is a schematic structural view of the integrated housing according to the embodiment of the present invention, in which the rear end cover mounting surface faces the left front side.

Wherein: 1. a rear end cap body; 11. a first end face; 12. a first encoder cavity; 13. a protrusion; 14. positioning holes; 15. a first mounting hole; 16. a second mounting hole; 17. a shaft hole; 18. a boss; 19. a notch; 2. a gasket; 21. a hollow cavity; 22. a third mounting hole; 3. a rear cover; 31. a second encoder cavity; 32. a sealing surface; 33. a fourth mounting hole; 34. a second positioning column; 35. blocking edges; 4. an integral shell; 5. a rear end cap flange; 51. a rear end cover mounting surface; 52. and a fifth mounting hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Referring to fig. 1 to 7, the utility model discloses a rear end cap structure, with the integrative shell 4 cooperation of motor, one of them integrative shell 4 adopts the integrative die-casting shaping of single part, it is concrete, as shown in fig. 7, the rear end that has the installation cavity that supplies stator module and rotor subassembly installation and installation cavity to correspond integrative shell 4 in integrative shell 4 has the installing port that supplies the rear end cap installation, the rear end integrated into one piece of integrative shell 4 has rear end cap mounting flange, the outer terminal surface of rear end cap also is the rear end face formation of integrative shell 4 and is rear end cap installation face 51. As for the specific structure of the integrated shell 4, it is not described in detail, but is not the innovative point of the present invention, and the specific structural description of the integrated shell 4 is found in another application document of the same date of the applicant about the structural scheme of the integrated shell 4. The rear end cover structure comprises a rear end cover body 1 and a first encoder accommodating cavity 12 formed in the rear end cover body 1. Two end faces in the thickness direction of the rear end cover body 1, that is, in the axial direction of the rotating shaft, are respectively implemented as a first end face 11 (an upper end face of the rear end cover body 1 shown in fig. 2) and a second end face (a lower end face of the rear end cover body 1 shown in fig. 2), the first end face 11 is used for attaching the gasket 2, and the second end face is suitable for attaching the rear end cover mounting surface 51. The first encoder cavity 12 is a cavity formed by the first end face 11 of the rear end cover body 1 sinking towards the second end face, and a through shaft hole 17 for the rotating shaft to penetrate is formed in the middle position of the bottom wall of the first encoder cavity 12. Through a cavity of shaping on the rear end cover be used for holding the encoder, need not set up encoder mounting structure alone, simplify the structure and can cooperate with integrative shell 4 after the improvement.

According to some preferred embodiments of the present invention, as shown in fig. 1 and fig. 2, a plurality of protrusions 13 protruding upwards from the first end surface 11 towards the direction deviating from the second end surface, that is, as shown in fig. 2, are arranged on the first end surface 11 of the rear end cover body 1 along the opening periphery of the first encoder accommodating cavity 12 at intervals. An outer wall surface of the boss 13 away from the opening of the first encoder housing 12 is formed as an abutting surface against the inner ring of the gasket 2. As shown in fig. 2, the protrusions 13 are in a fan-shaped ring shape, and the outer wall surface, i.e., the abutting surface, of each protrusion 13 is formed in an arc shape matching the inner ring of the gasket 2, which can play a role in positioning the inner ring of the gasket 2 and radially fixing the gasket 2, thereby facilitating quick installation of the gasket 2. Preferably, as shown in fig. 2, three protrusions 13 are uniformly distributed around the periphery of the opening of the first encoder housing 12. Other numbers are also possible for the number of projections 13, such as one, two, four, etc.

According to some preferred embodiments of the present invention, the rear end cap body 1 is substantially square, and a first mounting hole 15 for attaching and fixing the gasket 2 to the first end surface 11 of the rear end cap body 1 and a second mounting hole 16 for fixing the rear end cap body 1 to the integrated shell 4 are separately provided at any angular position. The first mounting hole 15 and the second mounting hole 16 each penetrate the first end surface 11 and the second end surface. Through the establishment of a plurality of first mounting holes 15 and second mounting holes 16, the installation of rear end cover body 1 and integrative shell 4 and the installation of sealed pad 2, rear end cover body 1 and rear cover 3 are fixed to be convenient for. Preferably, for the purpose of quickly positioning and installing the sealing gasket 2, a positioning hole 14 for installing the sealing gasket 2 is further formed between the first installation hole 15 and the second installation hole 16 at any angular position, and correspondingly, a first positioning column is arranged at the position of the sealing gasket 2 corresponding to the positioning hole 14, and as shown in fig. 6, a second positioning column 34 is arranged at the position of the rear cover 3 corresponding to the positioning hole 14. It should be noted that the first positioning column is a hollow column, that is, has a hollow cavity 21, so that the second positioning column 34 can be inserted into the hollow cavity 21 in the first positioning column for positioning when the rear cover 3 is installed. Preferably, any one of the angular positions of the end cap body is recessed centrally to form a notch 19. As shown in fig. 1 to 3, the notch 19 is substantially U-shaped, or arched, so that the appearance is beautiful and the weight can be reduced. The positioning hole 14 corresponds to the middle position of the notch 19, and the first mounting hole 15 and the second mounting hole 16 correspond to the both end positions of the notch 19. The gasket 2 is provided with a third mounting hole 22 corresponding to the first mounting hole 15. The rear cover 3 is provided with a fourth mounting hole 33 at a position corresponding to the first mounting hole 15. A rear end cover mounting surface 51 of the integrated housing 4 is provided with a fifth mounting hole 52 corresponding to the second mounting hole 16. The positions of the sealing gasket 2 and the rear cover 3 corresponding to the second mounting holes 16 are respectively provided with an avoiding cavity (not marked) for the fastener to penetrate through and connect the rear end cover and the integrated shell 4.

According to some preferred embodiments of the present invention, as shown in fig. 1 to 4, the rear end cap body 1 further includes a boss 18 protruding downward from the second end surface toward the direction deviating from the first end surface 11, i.e., as shown in fig. 4, and when being installed, the boss 18 extends into the installation opening at the rear end of the integrated shell 4. As shown in fig. 4, the boss 18 is a reverse tapered boss, and can be installed to position and compress the stator assembly.

It should be noted that, in the embodiment of the present invention, a recessed cavity is formed in the rear cover 3 from the direction close to the rear end cover to the direction away from the rear end cover, for convenience of description and distinction, the recessed cavity is described as the second encoder accommodating cavity 31, the second encoder accommodating cavity 31 and the first encoder accommodating cavity 12 jointly enclose a complete accommodating cavity for mounting the encoder, and the encoder is mounted on the rotating shaft and is accommodated in the accommodating cavity enclosed by the second encoder accommodating cavity 31 and the first encoder accommodating cavity 12 jointly. In addition, the second encoder accommodating cavity 31 can also be used as a mounting cavity of the fan blade. In the case of the rear cover 3, the end surface of the rear cover 3 that engages with the gasket 2 is described as a sealing surface 32, and a second positioning column 34 and a fourth mounting hole 33 are provided on the sealing surface 32. Preferably, as shown in fig. 5, a blocking edge 35 extending downward, i.e., toward the first end surface 11 of the rear end cover, is further provided around the outer ring of the sealing surface 32, and when the gasket 2 is mounted, the blocking edge 35 surrounds the outer ring of the gasket 2. Keep off along locating sealed periphery of filling up, can play the effect that improves sealed, the sealed pad of protection reduces the probability of sealed pad damage.

The embodiment of the utility model provides a still provide a motor, including the rear end cap structure of above-mentioned embodiment. Due to the rear end cover structure of the embodiment, the rear end cover structure at least has the beneficial effects of the rear end cover structure of the embodiment, and details are not repeated. Other conventional structures of the motor, such as stators, rotating shafts, etc., will not be described or limited in detail and will be known and readily implemented by those skilled in the art.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. The rear end cover structure of the motor is characterized by comprising an integrated shell, wherein a mounting cavity for mounting a stator assembly and a rotor assembly is formed in the integrated shell, a mounting opening for mounting a rear end cover is formed in the mounting cavity corresponding to the rear end of the integrated shell, and the rear end surface of the integrated shell is formed into a rear end cover mounting surface; the rear end cap structure includes:

2. The rear end cover structure of the motor according to claim 1, wherein a plurality of protrusions protruding from the first end face in a direction away from the second end face are arranged on the first end face of the rear end cover body at intervals along the periphery of the opening of the first encoder cavity;

3. The rear end cover structure of an electric motor according to claim 2, wherein the plurality of protrusions are uniformly spaced around the periphery of the opening of the first encoder cavity.

4. The rear end cover structure of an electric machine according to claim 2 or 3, wherein any of the protrusions has a fan-ring shape.

5. The rear end cap structure of an electric motor according to claim 1, wherein the rear end cap body has a square shape, and a first mounting hole for fitting and fixing a gasket to the first end surface of the rear end cap body and a second mounting hole for fixing the rear end cap body to the integrated housing are provided at a distance from each other at any angular position.

6. The rear end cap structure of an electric motor according to claim 5, wherein a positioning hole for mounting the gasket is further opened between the first mounting hole and the second mounting hole at any one of the angular positions.

7. The rear end cover structure of an electric machine according to claim 5 or 6, wherein any one of the angular positions of the rear end cover body is depressed toward the center to form a notch.

8. The rear end cap structure of an electric machine according to claim 1, wherein the rear end cap body further includes a boss that projects from the second end surface in a direction away from the first end surface, the boss projecting into a mounting opening at the rear end of the integrated housing when mounted.

9. An electrical machine comprising a rear end cap structure according to any one of claims 1 to 8.