High and low temperature resistant motor

Abstract

A high and low temperature resistant motor comprises: a housing; a stator core; a rotor; a front end cover; a rear end cover; at least one front bearing groove is formed in the outer surface of the outer ring of the front bearing, a front elastic piece is arranged in the front bearing groove, and the outer ring of the front bearing is connected with the front bearing seat through the front elastic piece; and / or at least one rear bearing groove is formed in the outer surface of the outer ring of the rear bearing, a rear elastic piece is arranged in the rear bearing groove, and the outer ring of the rear bearing is connected with the rear bearing seat through the rear elastic piece. According to the high and low temperature resistant motor provided by the invention, the bearing groove is formed in the outer ring of the bearing, and the elastic piece is arranged in the bearing groove, so that the risk of the problems such as bearing abrasion and rotation blocking, end cover abrasion and even breakage or bearing slipping caused by temperature change can be reduced, and the motor is suitable for high and low temperature environments with large temperature change compared with normal temperature. In addition, the mode is simpler, easy to implement and low in cost.

Description

Technical Field

[0001] This application relates to the technical field of motors, and particularly to a high and low temperature resistant motor. Background Art

[0002] A motor, also known as an electric motor, is a device that converts electrical energy into mechanical energy. It uses a current-carrying coil (i.e., the stator) to generate a rotating magnetic field that acts on the rotor (such as a squirrel-cage closed aluminum frame) to form a magnetoelectric dynamic rotating torque. Electric motors are divided into DC motors and AC motors according to the different power supplies used. Most of the motors in the power system are AC motors, which can be synchronous motors or asynchronous motors (the rotational speed of the stator magnetic field of the motor does not maintain the same speed as the rotational speed of the rotor). A motor mainly consists of a stator and a rotor. The direction of the force on a current-carrying wire in a magnetic field is related to the direction of the current and the direction of the magnetic induction line (magnetic field direction). The working principle of a motor is the force exerted by a magnetic field on an electric current, which causes the motor to rotate.

[0003] With the development of technology, motors are used more and more widely. And in some scenarios, motors need to be used in high and low temperature environments. For example, in an automated biological sample cryopreservation device, such a device stores biological samples through a low temperature environment, and a low temperature resistant motor is required to perform operations such as automated picking and placing of biological samples.

[0004] The end covers and bearings of a motor are made of different materials. Therefore, the thermal expansion coefficients of the end covers and bearings are different. When the temperature decreases, the fit between the end covers and bearings becomes tighter, which may cause problems such as end cover cracking. Therefore, there are already some low temperature resistant motors in the related art. For example, in the utility model patent with the patent application number CN202023314353.9, a bearing corrugated washer is provided between the end cover and the bearing to eliminate the effect of thermal expansion and contraction, so that the motor can meet the use requirements in a low temperature environment. However, the function of the bearing corrugated washer needs to be realized by its special shape, and such a bearing corrugated washer with this kind of shape is relatively complex and difficult to implement. Utility Model Content

[0005] In view of the above problems, this application is proposed to provide a high and low temperature resistant motor that overcomes the above problems or at least partially solves the above problems.

[0006] The present application provides a motor resistant to high and low temperatures, comprising: a housing that defines a receiving cavity having a front opening and a rear opening; a stator core disposed in the receiving cavity, the stator core defining a stator cavity having front and rear openings; a rotor disposed in the stator cavity, the rotor having a rotor shaft; a front end cover including a front main plate and a front bearing seat disposed at the rear side of the front main plate, the front end cover being connected to the housing to close the front opening, a front bearing being disposed in the front bearing seat, and the front end of the rotor shaft being rotationally connected to the front end cover through the front bearing; a rear end cover including a rear main plate and a rear bearing seat disposed at the front side of the rear main plate, the rear end cover being connected to the housing to close the rear opening, a rear bearing being disposed in the rear bearing seat, and the rear end of the rotor shaft being rotationally connected to the rear end cover through the rear bearing; at least one front bearing groove is formed on the outer surface of the outer ring of the front bearing, and a front elastic member is disposed in the front bearing groove, the front elastic member realizing the connection between the outer ring of the front bearing and the front bearing seat; and / or at least one rear bearing groove is formed on the outer surface of the outer ring of the rear bearing, and a rear elastic member is disposed in the rear bearing groove, the rear elastic member realizing the connection between the outer ring of the rear bearing and the rear bearing seat.

[0007] Optionally, the front elastic member, and / or the rear elastic member is made of silica gel.

[0008] Optionally, the front elastic member is disposed in the front bearing groove in an interference fit manner, and / or the rear elastic member is disposed in the rear bearing groove in an interference fit manner.

[0009] Optionally, the at least one front bearing groove includes a plurality of front bearing grooves, and / or the at least one rear bearing groove includes a plurality of rear bearing grooves.

[0010] Optionally, the plurality of front bearing grooves are arranged at equal intervals, and / or the plurality of rear bearing grooves are arranged at equal intervals.

[0011] Optionally, the front bearing groove is a rectangular groove, and / or the rear bearing groove is a rectangular groove.

[0012] Optionally, the front end cover is detachably connected to the housing, and / or the rear end cover is detachably connected to the housing.

[0013] Optionally, the front end cover is detachably connected to the housing by threads, and / or the rear end cover is detachably connected to the housing by threads.

[0014] Optionally, the front main plate and the front bearing seat are integrally formed, and / or the rear main plate and the rear bearing seat are integrally formed.

[0015] Optionally, the front end of the rotor shaft is in interference fit with the inner ring of the front bearing, and / or the rear end of the rotor shaft is in interference fit with the inner ring of the rear bearing.

[0016] The high and low temperature resistant motor provided by this application can reduce the risks of bearing wear and seizure, end cover wear or even rupture, or bearing slipping caused by temperature changes by providing a bearing groove on the outer ring of the bearing and arranging an elastic member in the bearing groove, and is applicable to environments with large temperature changes such as high and low temperatures compared to normal temperature. And this method is simpler, easier to implement, and has a low cost. Description of the Drawings

[0017] Other objects and advantages of the present application will be obvious from the following description of the present application with reference to the accompanying drawings, and can help to have a comprehensive understanding of the present application.

[0018] Figure 1 is a cross-sectional view of a high and low temperature resistant motor according to some embodiments of the present application;

[0019] Figure 2 is a cross-sectional view of a high and low temperature resistant motor according to other embodiments of the present application;

[0020] In the figure, 10 is a high and low temperature resistant motor, 100 is a housing, 110 is an accommodation cavity, 200 is a stator core, 210 is a stator cavity, 300 is a rotor, 310 is a rotor shaft, 400 is a front end cover, 410 is a front main body plate, 420 is a front bearing seat, 430 is a front bearing, 432 is a front elastic member, 500 is a rear end cover, 510 is a rear main body plate, 520 is a rear bearing seat, 530 is a rear bearing, and 532 is a rear elastic member. Detailed Embodiments

[0021] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are one embodiment of the present application, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0022] Unless otherwise defined, the technical terms or scientific terms used in the present application shall have the ordinary meanings understood by those of ordinary skill in the art to which the present application belongs.

[0023] This embodiment provides a high and low temperature resistant motor 10, Figure 1 is a cross-sectional view of a high and low temperature resistant motor 10 according to some embodiments of the present application, Figure 2 is a cross-sectional view of a high and low temperature resistant motor 10 according to other embodiments of the present application.

[0024] The high and low temperature resistant motor 10 includes a housing 100, a stator core 200, a rotor 300, a front end cover 400, and a rear end cover 500.

[0025] The housing 100 defines a receiving cavity 110 having a front opening and a rear opening. The stator core 200 is disposed in the receiving cavity 110, and the stator core 200 defines a stator cavity 210 having front and rear openings. The rotor 300 is disposed in the stator cavity 210, and the rotor 300 has a rotor shaft 310. The front end cover 400 includes a front main body plate 410 and a front bearing seat 420 disposed on the rear side of the front main body plate 410. The front end cover 400 is connected to the housing 100 to close the front opening. A front bearing 430 is disposed in the front bearing seat 420, and the front end of the rotor shaft 310 is rotatably connected to the front end cover 400 through the front bearing 430. The rear end cover 500 includes a rear main body plate 510 and a rear bearing seat 520 disposed on the front side of the rear main body plate 510. The rear end cover 500 is connected to the housing 100 to close the rear opening. A rear bearing 530 is disposed in the rear bearing seat 520, and the rear end of the rotor shaft 310 is rotatably connected to the rear end cover 500 through the rear bearing 530. At least one front bearing groove is formed on the outer surface of the outer ring of the front bearing 430, and a front elastic member 432 is disposed in the front bearing groove. The front elastic member 432 realizes the connection between the outer ring of the front bearing 430 and the front bearing seat 420; and / or at least one rear bearing groove is formed on the outer surface of the outer ring of the rear bearing 530, and a rear elastic member 532 is disposed in the rear bearing groove. The rear elastic member 532 realizes the connection between the outer ring of the rear bearing 530 and the rear bearing seat 520.

[0026] The high and low temperature resistant motor 10 provided in this embodiment can reduce the risks of bearing wear and seizure, end cover wear or even rupture, or bearing slipping caused by temperature changes by providing bearing grooves on the outer ring of the bearing and disposing elastic members in the bearing grooves, and is applicable to environments with large temperature changes such as high and low temperatures compared to normal temperature. And this method is simpler, easier to implement, and has a low cost.

[0027] In some embodiments, the front elastic member 432, and / or the rear elastic member 532 is made of silica gel. Silica gel is a synthetic elastomer with excellent high temperature resistance, cold resistance, anti-aging, hydrolysis resistance and other properties. In terms of low temperature, silica gel can maintain good elasticity and flexibility at extremely low temperatures. The low temperature performance of silica gel is affected by the material hardness and fillers. Generally speaking, the lower the hardness of silica gel, the better its performance at low temperatures. For example, silica gel with a hardness of 20-30 can still maintain elasticity and flexibility at a temperature of -60°C. In addition, silica gel filled with quartz has better low temperature performance than silica gel filled with carbon black.

[0028] In some embodiments, the front elastic member 432 is disposed in the front bearing groove in an interference fit manner, and / or the rear elastic member 532 is disposed in the rear bearing groove in an interference fit manner. By this interference fit method, the installation of the elastic member and the bearing can be simply achieved, improving production efficiency.

[0029] In some embodiments, the at least one front bearing groove includes a plurality of front bearing grooves, and / or the at least one rear bearing groove includes a plurality of rear bearing grooves. Thereby, the risk of problems such as the end cover cracking due to temperature reduction can be further reduced.

[0030] In some embodiments, the plurality of front bearing grooves are evenly spaced, and / or the plurality of rear bearing grooves are evenly spaced. Thereby, the risk of problems such as cracking of each region of the end cover due to temperature reduction can be reduced.

[0031] In some embodiments, the front bearing groove is a rectangular groove, and / or the rear bearing groove is a rectangular groove. Such a rectangular groove is simple to machine.

[0032] In some embodiments, the front end cover 400 is detachably connected to the housing 100, and / or the rear end cover 500 is detachably connected to the housing 100. Thereby, operations such as repairing the high and low temperature resistant motor 10 and replacing components are facilitated.

[0033] In some embodiments, the front end cover 400 is detachably connected to the housing 100 by threads, and / or the rear end cover 500 is detachably connected to the housing 100 by threads. Thereby, it is convenient to use.

[0034] In some embodiments, the front main body plate 410 and the front bearing seat 420 are integrally formed, and / or the rear main body plate 510 and the rear bearing seat 520 are integrally formed. Thereby, production and processing are facilitated, and heat transfer into the motor is avoided.

[0035] In some embodiments, the front end of the rotor shaft 310 is in interference fit with the inner ring of the front bearing 430, and / or the rear end of the rotor shaft 310 is in interference fit with the inner ring of the rear bearing 530. Thereby, production and processing are simple.

[0036] For the embodiments of the present application, it should also be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0037] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A high and low temperature resistant motor, characterized in that, Comprising: A housing that defines a receiving cavity having a front opening and a rear opening; A stator core disposed in the receiving cavity, the stator core defining a stator cavity having front and rear openings; A rotor disposed in the stator cavity, the rotor having a rotor shaft; A front end cover including a front main plate and a front bearing seat disposed on the rear side of the front main plate, the front end cover being connected to the housing to close the front opening, a front bearing being disposed in the front bearing seat, and the front end of the rotor shaft being rotatably connected to the front end cover through the front bearing; A rear end cover including a rear main plate and a rear bearing seat disposed on the front side of the rear main plate, the rear end cover being connected to the housing to close the rear opening, a rear bearing being disposed in the rear bearing seat, and the rear end of the rotor shaft being rotatably connected to the rear end cover through the rear bearing; At least one front bearing groove is formed on the outer surface of the outer ring of the front bearing, and a front elastic member is disposed in the front bearing groove, and the front elastic member realizes the connection between the outer ring of the front bearing and the front bearing seat; and / or At least one rear bearing groove is formed on the outer surface of the outer ring of the rear bearing, and a rear elastic member is disposed in the rear bearing groove, and the rear elastic member realizes the connection between the outer ring of the rear bearing and the rear bearing seat.

2. The high and low temperature resistant motor according to claim 1, wherein The front elastic member, and / or, the rear elastic member is made of silica gel.

3. The high and low temperature resistant motor according to claim 1, wherein The front elastic member is disposed in the front bearing groove by an interference fit, and / or, the rear elastic member is disposed in the rear bearing groove by an interference fit.

4. The high and low temperature resistant motor according to claim 1, wherein The at least one front bearing groove includes a plurality of front bearing grooves, and / or, the at least one rear bearing groove includes a plurality of rear bearing grooves.

5. The high and low temperature resistant motor according to claim 4, wherein The plurality of front bearing grooves are arranged at equal intervals, and / or, the plurality of rear bearing grooves are arranged at equal intervals.

6. The high and low temperature resistant motor according to claim 1, wherein The front bearing groove is a rectangular groove, and / or, the rear bearing groove is a rectangular groove.

7. The high and low temperature resistant motor according to claim 1, wherein The front end cover is detachably connected to the housing, and / or, the rear end cover is detachably connected to the housing.

8. The high and low temperature resistant motor according to claim 7, wherein The front end cover is detachably connected to the housing by a thread, and / or, the rear end cover is detachably connected to the housing by a thread.

9. The high and low temperature resistant motor according to claim 1, wherein The front main plate and the front bearing seat are integrally formed, and / or, the rear main plate and the rear bearing seat are integrally formed.

10. The high and low temperature resistant motor according to claim 1, wherein The front end of the rotor shaft is in interference fit with the inner ring of the front bearing, and / or, the rear end of the rotor shaft is in interference fit with the inner ring of the rear bearing.

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