CN217115788U

CN217115788U - Motor end cover and motor comprising same

Info

Publication number: CN217115788U
Application number: CN202220722891.1U
Authority: CN
Inventors: 苏良瑶; 张志宏; 张光辉; 周永松
Original assignee: Hangzhou Bensong New Materials Technology Co ltd
Current assignee: Hangzhou Bensong New Materials Technology Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-08-02
Anticipated expiration: 2032-03-31

Abstract

The utility model discloses a motor end cover, which comprises an end cover body, wherein the end cover body consists of a metal insert and a plastic shell with a hollow structure; the metal insert is of an open structure comprising a bottom and a side wall, a bearing chamber is arranged at the center of the bottom of the metal insert, an outward-turned flanging is arranged on the end face of the open structure, a plurality of radially-extending lugs are arranged at intervals on the periphery of the flanging, and a grounding through hole is formed in the middle of each lug; the metal inner insert and the plastic shell are integrally formed through insert injection molding or insert die pressing technology. The motor end cover of the utility model adopts a plastic-coated metal structure, the end cover part contacted with the motor bearing and the stator module shell keeps metal material, and other parts are made of plastic material, thereby not only realizing the grounding protection of the motor by grounding connection, but also obviously reducing the material cost of the end cover; and the insert injection molding or insert die pressing process is adopted for integral forming, so that the production efficiency of the end cover is greatly improved compared with the traditional metal end cover.

Description

Motor end cover and motor comprising same

Technical Field

The utility model relates to the technical field of electric machines, more specifically say so and relate to a motor end cover and contain motor of this end cover.

Background

The motor is more and more widely used, the use safety of the motor is more and more emphasized, and whether the grounding of the motor is reliable and firm is an important mark for realizing the safe use of the motor. The common grounding connection structure of the motor generally comprises that holes and tapping are formed in a motor end cover or a motor shell, and an electric wire with a grounding terminal is fixed on the tapped end cover or the tapped shell through screws.

The motor end cover is a part which is matched with a shell of a motor and used for fixing a stator and a rotor in the motor. The motor grounding connection structure is arranged on the motor end cover based on the fact that the motor end cover is made of metal, the motor end cover made of metal belongs to die castings, the machining process is complex, the production efficiency is low, and the machining energy consumption is high. Under the pressure of competition, motor manufacturers hope to reduce the cost of raw materials, and plastic motor end covers with cost advantages and processing advantages are met with new opportunities under the guidance of the national 'double-carbon' policy. However, for a motor with a grounding requirement, the plastic motor end cover cannot assemble a grounding wire on the end cover because the plastic motor end cover belongs to an insulating material, and only the grounding wire can be directly welded on the motor shell, so that the attractiveness of the motor shell is influenced, certain damage is caused to the motor shell, welding and dismounting of the grounding wire need to be performed by means of welding equipment, the operation is complex, and the working efficiency is low, so that the motor with the grounding requirement can only reject the plastic end cover at present, and continue to use the metal end cover, and the cost is reduced.

Disclosure of Invention

An object of the utility model is to provide a motor end cover aims at solving the motor that has the ground connection demand at present and can only use the metal end cover, or chooses for use plastics motor end cover to need to cause the problem of motor housing damage with earth conductor lug weld on motor housing.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a motor end cover comprises an end cover body, wherein the end cover body consists of a metal insert and a plastic shell with a hollow structure; the metal insert is of an open structure comprising a bottom and a side wall, a bearing chamber is arranged at the center of the bottom of the metal insert, an outward-turned flanging is arranged on the end face of the open structure, a plurality of radially-extending lugs are arranged at intervals on the periphery of the flanging, and a grounding through hole is formed in the middle of each lug; the metal inner insert and the plastic shell are integrally formed through insert injection molding or insert die pressing technology.

Motor ground connection mainly is metal conductive parts's such as rotor, bearing and stator module ground protection, the utility model discloses a structural design combines plastics motor end cover and metal motor end cover with the help of inserts injection molding process, realizes still being the metal material with the end cover position of motor bearing and stator module casing contact to with the ground connection through-hole setting at the interior inserts outward flange of metal material, make things convenient for earth conductor's installation and dismantlement. The outer wall of the metal inner insert is coated by the plastic shell, so that the strength of the motor end cover can be ensured, the wall thickness of the metal inner insert can be reduced to achieve the purpose of reducing the cost of the motor end cover for using metal raw materials, and the application range of plastics is widened.

Furthermore, a plurality of assembling through holes are formed in the flanging of the metal inner insert.

Furthermore, the bottom of the metal insert is provided with a threading hole for accommodating a motor wire harness.

Furthermore, screw mounting holes are formed in two sides of the threading hole and used for externally fixing a waterproof and dustproof cover, and the threading hole is in a sealed state after the motor is assembled.

Optionally, a plurality of reinforcing ribs are arranged at the bottom of the metal insert.

The bottom of the metal insert is additionally provided with the reinforcing rib, so that the bottom thickness of the metal insert can be reduced while the strength of the bottom of the end cover is ensured, and the purposes of saving materials and reducing cost of the end cover are further achieved.

Furthermore, a plurality of grounding salient points are arranged on the inner wall of the opening end of the metal insert at intervals so as to ensure that the metal insert can be effectively contacted with the motor stator shell, and the purpose of effective grounding is achieved.

Furthermore, the outer wall of the plastic shell with the hollow structure is provided with a reinforcing rib, so that the wall thickness of the plastic shell with the hollow structure is reduced while the strength of the plastic shell with the hollow structure is increased, the consumption of plastic raw materials is saved, and the cost of the raw materials of the end cover is further reduced.

Furthermore, the side wall of the plastic shell with the hollow structure is provided with a mounting seat which protrudes outwards from the peripheral edge of the plastic shell, and the mounting seat is provided with a mounting through hole.

Furthermore, one side of the mounting seat is provided with criss-cross reinforcing ribs, and the other side of the mounting seat is provided with a triangular reinforcing rib plate.

Another object of the present invention is to provide a motor, which comprises a motor stator assembly and a motor end cap of any one of the above mentioned items, wherein the motor end cap is connected to the stator assembly.

Compared with the prior art, the utility model discloses following beneficial effect has at least: the motor end cover adopts a plastic-coated metal structure, the part of the end cover, which is in contact with the motor bearing and the stator assembly shell, is made of metal, and the other parts are made of plastic; the motor end cover with the plastic-coated metal structure is integrally formed by adopting insert injection molding or insert die pressing technology, compared with the traditional metal end cover, the production efficiency of the end cover is greatly improved, the raw material cost of the motor end cover is reduced, the processing cost of the motor end cover can be further reduced, and the application field of plastics is widened.

Drawings

Fig. 1 is a schematic diagram of the front structure of the motor end cover of the present invention.

Fig. 2 is a schematic diagram of the back structure of the motor end cover of the present invention.

Fig. 3 is the schematic view of the structure of the insert in the metal of the motor end cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, 2 and 3, the utility model provides a motor end cover, which comprises an end cover body, wherein the end cover body is composed of a metal insert 1 and a hollow plastic shell 2, and the metal insert and the plastic shell are integrally formed through an insert injection molding process; the metal insert is of an open structure comprising a bottom and a side wall, a bearing chamber 3 is arranged at the center of the bottom of the metal insert, an outward-turned flanging 4 is arranged on the end face of the open structure, a plurality of radially-extending lugs 5 are arranged at intervals on the periphery of the flanging, and a grounding through hole 6 is formed in the middle of each lug; be equipped with a plurality of assembly through-holes 7 on the turn-ups of inserts in the metal, insert bottom has seted up through wires hole 8 in the metal, the both sides of through wires hole 8 are equipped with screw mounting hole 9, insert bottom is equipped with a plurality of strengthening ribs 10 in the metal, the opening end inner wall interval of inserts is equipped with a plurality of ground connection bumps 11 in the metal, hollow structure's plastic housing outer wall is equipped with the strengthening rib, and the lateral wall is equipped with the evagination in mount pad 12 that the plastic housing periphery was followed, mounting hole 13 has been seted up on the mount pad, the one side of mount pad is equipped with vertically and horizontally staggered's strengthening rib 14, and the another side is equipped with triangle deep floor 15.

The motor end cover of this embodiment, after accomplishing the assembly between end cover and motor bearing and stator module, only need with earth conductor through welding or screw fixed connection on the ground connection through-hole that the turn-ups lug middle part of inserts was seted up in the metal, can realize motor ground connection, the simple operation is connected in the ground connection. The end cover adopts a plastic-coated metal structure, and the bottom parts of the plastic shell and the metal inner insert are additionally provided with the reinforcing ribs, so that the metal and plastic materials can be greatly reduced, and the purpose of reducing the cost of the raw materials of the end cover is achieved.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. The motor end cover is characterized by comprising an end cover body, wherein the end cover body consists of a metal insert and a plastic shell with a hollow structure; the metal insert is of an open structure comprising a bottom and a side wall, a bearing chamber is arranged in the center of the bottom of the metal insert, an outward-turned flanging is arranged on the end face of the open structure, a plurality of lugs extending in the radial direction are arranged on the periphery of the flanging at intervals, and a grounding through hole is formed in the middle of each lug; the metal inner insert and the plastic shell are integrally formed through insert injection molding or insert die pressing technology.

2. The motor end cover according to claim 1, wherein a plurality of assembling through holes are formed on a flanging of the metal inner insert.

3. The motor end cover according to claim 1, wherein a threading hole is formed at the bottom of the metal insert.

4. The motor end cover according to claim 3, wherein screw mounting holes are formed at both sides of the threading hole.

5. The motor end cover of claim 1, wherein the bottom of the metal insert is provided with a plurality of reinforcing ribs.

6. An end cover for an electric machine according to claim 1, wherein the metal insert has a plurality of grounding protrusions spaced from the inner wall of the open end.

7. The motor end cover of claim 1, wherein the outer wall of the plastic shell of the hollow structure is provided with reinforcing ribs.

8. The motor end cover according to claim 1, wherein the side wall of the plastic shell with a hollow structure is provided with a mounting seat protruding outwards from the outer peripheral edge of the plastic shell, and the mounting seat is provided with a mounting through hole.

9. The motor end cover according to claim 8, wherein one side of the mounting seat is provided with criss-cross reinforcing ribs, and the other side is provided with a triangular reinforcing rib plate.

10. An electric machine comprising a machine stator assembly and a machine end cap according to any of claims 1 to 9, the machine end cap being connected to the stator assembly.