CN210007515U

CN210007515U - Motor casing for improving stator insulation

Info

Publication number: CN210007515U
Application number: CN201921312720.6U
Authority: CN
Inventors: 张正良
Original assignee: Guangzhou Bailitong Electric Machinery Co Ltd
Current assignee: Guangzhou Bailitong Electric Machinery Co Ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-01-31
Anticipated expiration: 2029-08-14

Abstract

improve insulating motor housing of stator, including shell body, well lid and back lid, well lid rear end is equipped with the back cavity that is used for placing drive circuit board, be equipped with four at least screw hole posts that are used for fixed drive circuit board on the back cavity, the front end of well lid is equipped with preceding cavity, preceding cavity central point puts and is equipped with the circle projection, the central point of circle projection puts and is equipped with bearing groove, be equipped with the bearing that is used for assembling rotor end on the bearing groove, the edge part of circle projection still is equipped with the isolation recess that is used for assembling the spacer sleeve, the edge of preceding cavity still is equipped with the encapsulating mouth and the winding displacement hole that run through the bottom.

Description

Motor casing for improving stator insulation

Technical Field

The utility model relates to a motor field of water-cooled water pump, especially improve the insulating motor housing of stator.

Background

The automobile water pump is a device used for conveying engine coolant on an automobile, and can be divided into a mechanical water pump and an electric water pump according to a driving mode, and the electric water pump can be divided into a brushed electric water pump and a brushless electric water pump according to whether a carbon brush exists or not. The mechanical water pump is driven by the engine, the rotating speed of the water pump and the rotating speed of the engine form a fixed ratio, the heat dissipation requirement under the low-speed and high-load working condition cannot be met, and the cooling requirements of parts such as a main drive motor of a new energy automobile and the water supply requirement on a motor home cannot be met when the engine stops working; the brushed electric water pump has poor electromagnetic interference resistance, the carbon brush is easy to generate electric sparks to interfere other electronic devices, and meanwhile, due to the abrasion influence of the reversing carbon brush, the brushed electric water pump is short in service life and not suitable for new energy automobiles. Therefore, the direct current brushless motor water pump will be more and more applied to high-end automobiles, new energy automobiles and motor homes.

When a water-cooled water pump in a brushless direct-current motor works, the rotating speed is high, a large amount of heat can be generated particularly under the condition of high-power output, and meanwhile, for cooling a driving circuit board and the heat generated by a rotor in the working process, water or cooling liquid enters the space where the rotor is located inside the motor to cool the rotor and a rear cover body loaded with the driving circuit board for heat dissipation, so that the problem how to improve the insulativity of a stator inside the motor becomes a problem which needs to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned shortcoming of the prior art, the utility model aims at providing motor housing that improve stator insulating properties.

improve the insulating motor housing of stator, including shell body, well lid and back lid, well lid outside is equipped with at least four through-holes that are used for fixing between shell body and back lid, wherein well lid rear end is equipped with the back cavity that is used for placing drive circuit board, be equipped with four at least screw hole posts that are used for fixed drive circuit board on the back cavity, the front end of well lid is equipped with preceding cavity, preceding cavity central point puts and is equipped with the circle projection, the central point of circle projection puts and is equipped with bearing groove, be equipped with the bearing that is used for assembling rotor end on the bearing groove, the edge part of circle projection still is equipped with the isolation groove that is used for assembling the spacer sleeve, the edge of preceding cavity still is equipped with the encapsulating mouth and the line hole of arranging that runs through the bottom.

As an improvement of the utility model in steps, the housing body is provided with a containing cavity for placing a stator and a rotor, the central position of the containing cavity is provided with a protruding stator convex column for assembling a stator end, the bottom of the containing cavity is provided with an annular convex column protruding from the periphery of the stator convex column, the annular convex column and the inner wall of the containing cavity form a annular groove, a second annular groove is formed between the annular convex column and the stator convex column, and at least two hollow parts are uniformly arranged on the second annular groove.

As an improvement of the utility model in steps, the bottom of the inner wall of the annular convex column is provided with a step part, the step part is connected with the front end of the isolating sleeve, the joint forms a annular sealing cavity, the inner side of the rear end of the isolating sleeve and the isolating groove form a second annular sealing cavity, the joint of the inner wall of the middle cover body and the inner wall of the shell body is provided with a third annular sealing cavity, the joint of the outer side surface of the rear cover body and the inner side surface of the middle cover body is provided with a fourth annular sealing cavity, and each annular sealing cavity is internally provided with an O-shaped sealing ring.

Compared with the prior art, the beneficial effects of the utility model are that: the sealed space where the stator is located and the water flow space where the rotor is located are effectively isolated through the isolation sleeve, and meanwhile, the sealed space where the stator is located is subjected to glue pouring and insulating treatment after assembly, so that the insulating property of the stator is effectively improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the middle cover body.

Fig. 3 is a schematic structural diagram of the middle cover body.

Fig. 4 is a partially enlarged view of the front end of the spacer sleeve.

Fig. 5 is a partially enlarged view of the rear end of the spacer sleeve.

Detailed Description

The present invention will now be described with reference to the accompanying drawings, which are illustrative and exemplary in nature, in :

referring to fig. 1-5, motor housings for improving stator insulation include a housing body 1, a middle cover body 2 and a rear cover body 3, where the outer side of the middle cover body 2 is provided with at least four through holes 21 for fixing between the housing body 1 and the rear cover body 3, the housing body 1 is provided with a screw hole 11 at a position corresponding to the through hole, the rear cover body 3 is provided with a second through hole 31 corresponding to the through hole, and bolts are adopted to pass through the second through hole 31 and the through hole 21 in sequence to be locked on the screw hole 11, so as to fix the housing body 1, the middle cover body 2 and the rear cover body 3.

The rear end of the middle cover body 2 is provided with a rear cavity 22 for placing a driving circuit board, the rear cavity 22 is provided with at least four screw hole columns 23 for fixing the driving circuit board, and the screw hole columns are screw hole columns with internal threads and used for fixing the driving circuit board.

The front end of the middle cover body 2 is provided with a front cavity 24, the center of the front cavity 24 is provided with a circular convex column 25, the center of the circular convex column is provided with a bearing groove 26, the bearing groove 26 is provided with a bearing used for assembling the end of the rotor , the edge of the circular convex column 25 is also provided with an isolation groove 27 used for assembling the isolation sleeve 6, the edge of the front cavity 24 is also provided with a glue filling port 28 and a wire arranging hole 29 which penetrate through the bottom, and the wire arranging hole is used for reserving a three-phase lead of a stator to penetrate through the middle cover body and be electrically connected with a driving circuit board.

Housing body 1 is equipped with the chamber 12 that holds that is used for placing stator 4 and rotor 5, hold chamber 12 central point and put protruding stator projection 13 that is used for assembling stator end, 13 axle center positions of stator projection are equipped with bearing groove two, be equipped with bearing two that is used for assembling rotor end in the bearing groove two, with the bearing cooperation on the well lid, the rotor rotates in the bearing when the stator produces magnetic field.

An annular convex column 14 is further protruded at the periphery of the stator convex column 13 at the bottom of the accommodating cavity 12, an th annular groove 15 is formed between the annular convex column 14 and the inner wall of the accommodating cavity 12, the top surface of the annular convex column is used as a limiting surface of the front end of the stator, a second annular groove 16 is formed between the annular convex column 14 and the stator convex column 13, at least two hollow parts 17 are uniformly arranged on the second annular groove 16, when the motor is soaked in water to work, water enters a space where the rotor is located through the hollow parts, and flows to dissipate heat of the rotor and a rear cover body of the fixed driving circuit board in the rotating process of the rotor.

The bottom of the inner wall of the annular convex column 14 is provided with a step part 18, the step part 18 is connected with the front end of the isolation sleeve 3, a th annular sealing cavity 61 is formed at the joint, a second annular sealing cavity 62 is formed at the inner side of the rear end of the isolation sleeve 6 and the isolation groove 27, a third annular sealing cavity 63 is arranged at the joint of the inner wall of the middle cover body 2 and the inner wall of the shell body 1, and O-shaped sealing rings are arranged in the three annular sealing cavities.

A fourth annular sealing cavity 64 is formed in the joint of the outer side face of the rear cover body 3 and the inner side face of the middle cover body 2, an O-shaped sealing ring is arranged in the fourth annular sealing cavity 64, and the sealing performance of a rear cavity of the middle cover body is guaranteed.

In conclusion, after the ordinary skilled in the art reads the document of the present invention, according to the present invention, the technical solution and technical concept of the present invention do not need creative mental labor to make other various corresponding transformation schemes, which all belong to the protection scope of the present invention.

Claims

The motor shell capable of improving the stator insulativity is characterized in that a rear cavity used for placing a driving circuit board is arranged at the rear end of the middle cover body, at least four screw hole columns used for fixing the driving circuit board are arranged on the rear cavity, a front cavity is arranged at the front end of the middle cover body, a circular convex column is arranged at the center of the front cavity, a bearing groove is arranged at the center of the circular convex column, a bearing used for assembling the end of a rotor is arranged on the bearing groove, an isolation groove used for assembling an isolation sleeve is further arranged at the edge of the circular convex column, and a glue filling port and a wire arranging hole penetrating through the bottom are further formed in the edge of the front cavity.
2. The motor casing with improved stator insulation of claim 1, wherein the casing body has a cavity for holding the stator and rotor, the center of the cavity has a protruding stator post for assembling the end of the stator, the bottom of the cavity has a protruding ring post around the stator post, the ring post and the inner wall of the cavity form a ring groove, the bottom of the inner wall of the ring post has a step part, the step part is connected with the front end of the isolation sleeve, the connection part forms a ring-shaped sealing cavity, a second ring groove is formed between the ring post and the stator post, and the second ring groove has at least two openings.