CN215071946U

CN215071946U - Motor rear end cover

Info

Publication number: CN215071946U
Application number: CN202121342869.6U
Authority: CN
Inventors: 李世旺; 俞建恒
Original assignee: Wuhu Zhaoli Motor Co ltd
Current assignee: Wuhu Zhaoli Motor Co ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2021-12-07
Anticipated expiration: 2031-06-16

Abstract

The utility model discloses a motor rear end cover, which comprises an end cover plate and a ventilation device, wherein a bearing sleeve is fixed in the middle of the inner wall of the end cover plate, the ventilation device is arranged on the outer wall of the end cover plate and corresponds to the bearing sleeve in position, the ventilation device comprises a shell and a waterproof ventilation assembly transversely arranged on the shell, and an air-distributing groove communicated with the waterproof ventilation assembly is formed in the inner wall of the shell; the end cover plate is transversely provided with a ventilation groove communicated with the air homogenizing groove; and a fastening component used for connecting the rotor shell is arranged on the peripheral side wall of the end cover plate. The utility model discloses to among the prior art motor rear end cap heat radiation structure design reasonable inadequately, the installation is steady scheduling problem improves inadequately, the utility model has the advantages of without the help of outside electric power heat radiation equipment, alright take out the interior heat energy of motor cavity, with rotor housing mounting structure stable, realize its waterproof ventilative effect under the radiating prerequisite of not influencing the motor cavity.

Description

Motor rear end cover

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a motor rear end cap.

Background

The motor is an electromagnetic device for realizing electric energy conversion or transmission according to the electromagnetic induction law, has the main function of generating driving torque, and is widely applied to production and life nowadays.

The motor end cover is mainly used for fixing or supporting important parts of a stator and a rotor, the structural design of the rear end cover of the motor at present is not reasonable enough, most of the rear end cover is an iron casting with a single structure, and the following problems can be caused:

firstly, when the motor works for a long time, the temperature rises, so that a bearing chamber of the rear end cover has a thermal expansion phenomenon, and a bearing runs out of an outer ring; therefore, most of the existing motors adopt fans to radiate the rear end cover, but the radiating fans can generate and radiate certain heat energy during operation, so that the radiating effect is not ideal; and secondly, when the rotor rotates at a high speed, the vibration received by the bearing is transmitted to the rear end cover, so that the rear end cover and the side shell are loosened to a certain degree at the connecting position, and the operation of the motor is influenced for a long time. Aiming at the problems, the novel design is carried out on the basis of the original motor rear end cover.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a motor rear end cap, it is not reasonable enough to have solved current motor rear end cap structural design, and the radiating effect is unsatisfactory, and rotates at a high speed when the rotor, makes rear end cap and side casing hookup location appear the not hard up problem of certain degree.

The utility model discloses a following technical scheme realizes: the utility model discloses a motor rear end cover, which comprises an end cover plate and a ventilation device, wherein the middle part of the inner wall is fixed with a bearing sleeve, the ventilation device is arranged on the outer wall of the end cover plate and corresponds to the position of the bearing sleeve, the ventilation device comprises a shell and a waterproof ventilation component transversely arranged on the shell, and the inner wall of the shell is provided with an air-distributing groove communicated with the waterproof ventilation component; the end cover plate is transversely provided with a ventilation groove communicated with the air homogenizing groove; and a fastening component used for connecting the rotor shell is arranged on the peripheral side wall of the end cover plate.

Furthermore, for better realization motor cavity ventilates and has water-proof effects simultaneously, thereby improve motor element's life to a certain extent, water-proof ventilation assembly sets up and at least three breakwaters of mutual interval about seting up in cavity and the cavity on the casing outer wall in turn, fixes through the horizontal pole between three breakwaters.

Furthermore, in order to facilitate the rear end cover to have a better ventilation effect and good drainage performance, the side faces of at least two water baffles close to the air homogenizing groove are fixed with the cavity, and a drainage gap is arranged between the bottom end of the water baffle located at the outermost side and the bottom wall of the cavity.

Further, in order to facilitate the inseparable connection of this rear end cap and electric motor rotor casing fixed, the frictional force between the external screw thread in the increase connection bolt spare, fastening components include the engaging lug and run through the solid fixed ring in the engaging lug, and the solid fixed ring surface equidistant encircles the installation and is used for the anti preforming of elasticity of locking bolt.

Furthermore, in order to increase the tightness of the internal connection of the motor and the overall durability of the rear end cover, the peripheral side wall of the bearing sleeve is provided with a clamping block fixed on the end cover plate, and a supporting rod used for providing supporting force is fixed between the end cover plate, the clamping block and the bearing sleeve.

Furthermore, for better cooling rotor shaft and mounting groove hookup location that dispels the heat to the bearing chamber that reduces the rear end cover appears the thermal expansion phenomenon, avoids the bearing to run the outer lane, and ventilation unit is hollow cylindricality structure, and the ventilation unit center is linked together with the through-hole in bearing housing axle center, and the inner chamber of through-hole is equipped with spacing ring cover, runs through on the wall of spacing ring cover inner chamber and encircles and offer the heat energy transmission groove that is used for rotor shaft heat dissipation.

The utility model has the advantages of it is following:

(1) the utility model discloses utilize the ventilation groove to introduce outside cooling air from ventilation unit, make the cooling air flow in the motor cavity inside, the circulation of air circulation that forms is finally taken heat energy out of the motor outside from another ventilation unit, compare and dispel the heat through the fan now, this structure does not rely on outside electric power heat radiation equipment, can take out the heat energy in the motor cavity, avoids producing extra heat energy in the cavity while energy-concerving and environment-protective, the heat extraction effect is ideal;

(2) the utility model has the advantages that the elastic anti-pressing sheets arranged on the two sides of the fixing ring in the fastening assembly deform after being pressed, so that a larger reaction force is generated, the interaction force between the nut and the bolt meshing thread is enhanced by utilizing the deformation force, the friction force between the inner thread and the outer thread is increased, the absolute resistance to the vibration of the rotor is provided, and the rear end cover is connected and fastened with the external motor shell;

(3) the utility model discloses the setting shelters from the crisscross breakwater in position in ventilation unit, can separate the splash-in of certain angle water, even water is followed outside baffle splash-in, does discharge in the clearance of reserving between outside baffle and the cavity, need not to install the fan blade housing that is used for the protection, can realize its water-proof effects under the radiating prerequisite of not influencing the motor.

Drawings

FIG. 1 is a schematic view of the end cover plate structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the mounting block of the present invention;

FIG. 3 is a schematic view of the ventilation device of the present invention;

FIG. 4 is a schematic view of the whole half-section structure of the present invention;

FIG. 5 is a schematic structural view of the waterproof and ventilating assembly of the present invention;

fig. 6 is an enlarged schematic view of the structure at a in fig. 2 of the present invention;

fig. 7 is a schematic structural view of the fastening assembly of the present invention;

fig. 8 is an enlarged schematic structural diagram of the present invention at B in fig. 2.

In the figure: 1. an end cover plate; 2. a bearing housing; 3. a strut; 4. a clamping block; 5. a fastening assembly; 51. a fixing ring; 52. elastic compression resistance; 6. a ventilation slot; 7. a through hole; 8. a spacing ring sleeve; 9. a ventilation device; 91. a housing; 92. a wind homogenizing groove; 93. a waterproof vent assembly; 931. a cavity; 932. a cross bar; 933. a water baffle.

Detailed Description

The following embodiments of the present invention are described in detail, and the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments, and in the description of the present invention, words like "front", "back", "left", "again" etc. indicating directions or position relations are only for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the indicated device or element must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

The utility model provides a technical scheme: a motor rear end cover comprises an end cover plate 1 and a ventilation device 9, wherein a bearing sleeve 2 is fixed in the middle of the inner wall of the end cover plate 1, the ventilation device 9 is used for exhausting heat, the ventilation device 9 is arranged on the outer wall of the end cover plate 1 and corresponds to the position of the bearing sleeve 2, as shown in figures 2 and 3, the ventilation device 9 comprises a shell 91 and a waterproof ventilation assembly 93 transversely arranged on the shell 91, and an air distributing groove 92 communicated with the waterproof ventilation assembly 93 is formed in the inner wall of the shell 91; as shown in fig. 2 and 4, the end cover plate 1 is transversely provided with a ventilation groove 6 communicated with the air-uniforming groove 92; and a fastening component 5 for connecting the rotor shell is arranged on the peripheral side wall of the end cover plate 1.

As shown in fig. 5 and 6, the waterproof and ventilating assembly 93 includes a cavity 931 formed on an outer wall of the housing 91 and at least three water baffles 933 arranged in the cavity 931 in an up-down alternating manner and spaced from each other, the three water baffles 933 are fixed by a cross bar 932, and the water baffles 933 can isolate the splashing of external water and maintain a dry working environment in the motor cavity.

As shown in fig. 6, at least two water baffles 933 close to the air uniformizing groove 92 are fixed on the side surfaces of the cavity 931, and a drainage gap is provided between the bottom end of the other water baffle 933 located at the outermost side and the bottom wall of the cavity 931 for discharging water in the tuyere of the ventilation device 9, so as to prevent the splashed water from being accumulated in the rear end cover.

As shown in fig. 1 and 7, the fastening assembly 5 includes a connection lug and a fixing ring 51 penetrating through the connection lug, wherein the surface of the fixing ring 51 is provided with elastic pressure-resistant sheets 52 surrounding the locking bolt at equal intervals to increase the friction force between the internal and external threads, so that the rear end cap is connected and fastened with the external motor casing.

As shown in fig. 1 and 4, the outer peripheral side wall of the bearing sleeve 2 is provided with a clamping block 4 fixed on the end cover plate 1, and a support rod 3 for providing supporting force is fixed between the end cover plate 1, the clamping block 4 and the bearing sleeve 2, so that the rear end cover structure is more stable.

As shown in fig. 2 and 8, the ventilation device 9 is a hollow cylindrical structure, the center of the ventilation device 9 is communicated with the through hole 7 of the axis of the bearing sleeve 2, the inner cavity of the through hole 7 is provided with a spacing ring sleeve 8, and the wall of the inner cavity of the spacing ring sleeve 8 is penetrated and surrounded with a heat energy transmission groove for heat dissipation of the rotor rotating shaft, so that the airflow circulation of the inner cavity is increased, and the thickness of the rear end cover is reduced.

The utility model discloses a theory of operation is: during assembly, the end cover plate 1 is aligned with the edge of an external motor shell, a connecting bolt penetrates through a fastening component 5 and a connecting groove of an external motor, meanwhile, a clamping block 4 is embedded with an external bump, a shaft rod of a rotor in the motor penetrates through a limiting ring sleeve 8 of a rear end cover, an external cooling air is sucked from a ventilation device 9 through a ventilation groove 6, the cooling air flows into a cavity of the motor, formed air circulation is realized, and finally, heat energy is taken out of the motor from the other ventilation device 9; the water baffles 933 with staggered shielding positions in the ventilation device 9 can block water from splashing into the ventilation device at a certain angle, and even if the water splashes into the ventilation device from the outer baffle, the water can be discharged from a gap reserved between the outer baffle and the cavity 931, so that the waterproof effect of the rear end cover is realized; the elastic pressing-resistant sheets 52 arranged on the two sides of the fixing ring 51 in the fastening assembly 5 deform after being pressed, a larger reaction force is generated, and the rear end cover is connected and fastened with an external motor shell, namely the assembly principle of the rear end cover of the motor.

Claims

1. A rear end cover of a motor is characterized by comprising an end cover plate and a ventilation device, wherein a bearing sleeve is fixed in the middle of the inner wall of the end cover plate, the ventilation device is used for exhausting heat and is arranged on the outer wall of the end cover plate and corresponds to the bearing sleeve in position, the ventilation device comprises a shell and a waterproof ventilation assembly transversely arranged on the shell, and an air distributing groove communicated with the waterproof ventilation assembly is formed in the inner wall of the shell; the end cover plate is transversely provided with a ventilation groove communicated with the air homogenizing groove; and a fastening component used for connecting the rotor shell is arranged on the peripheral side wall of the end cover plate.

2. The motor rear end cover of claim 1, wherein the waterproof and ventilating assembly comprises a cavity formed in the outer wall of the housing and at least three water baffles which are alternately arranged up and down in the cavity and are spaced from each other, and the three water baffles are fixed by a cross rod.

3. The rear end cover of an electric motor according to claim 2, wherein at least two water baffles adjacent to the air-uniforming groove are fixed to the cavity at side surfaces thereof, and a drainage gap is provided between a bottom end of the other water baffle located outermost and a bottom wall of the cavity.

4. The motor rear end cover of claim 1, wherein the fastening assembly includes an engaging lug and a retaining ring extending through the engaging lug, the retaining ring having a surface with resilient pressure-resistant tabs spaced around the surface for retaining the bolt.

5. The rear end cover of an electric motor according to claim 1, wherein the outer peripheral side wall of the bearing sleeve is provided with a clamping block fixed on the end cover plate, and a support rod for providing a supporting force is fixed between the end cover plate, the clamping block and the bearing sleeve.

6. The rear end cover of an electric motor according to claim 1, wherein the ventilation device is a hollow cylindrical structure, the center of the ventilation device is communicated with the through hole in the axis of the bearing sleeve, the inner cavity of the through hole is provided with a spacing ring sleeve, and the wall of the inner cavity of the spacing ring sleeve is penetrated and surrounded with a heat energy transmission groove for heat dissipation of the rotor rotating shaft.