Permanent magnet motor with high protection grade

Abstract

The utility model discloses a permanent magnet motor with a high protection grade. The permanent magnet motor with the high protection grade comprises a partition plate, a front machine shell is arranged on the front side of the partition plate, a front cover plate is arranged at the front end of the front machine shell, a motor cavity is defined by the front cover plate, the front machine shell and the partition plate, a rear machine shell is arranged on the rear side of the partition plate, a rear cover plate is arranged on the rear side of the rear machine shell, and a controller cavity is defined by the rear cover plate, the rear machine shell and the partition plate. A control module is arranged in the controller cavity, a control cable of the control module extends into the motor cavity, the partition plate is provided with an inner wire passing hole used for leading in the control cable, the outer side of the control cable is sleeved with a first rubber ring used for blocking the inner wire passing hole, and a power cable of the control module extends out of the controller cavity. The rear casing is provided with an outer wire passing hole for leading out a power cable, the outer side of the power cable is sleeved with a second rubber ring used for blocking the outer wire passing hole, and pouring sealant used for protecting the control module is arranged in the controller cavity. The utility model solves the problem of short service life in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a permanent magnet motor with a high protection level. Background Technology

[0002] A Chinese utility model patent with publication number CN213990463U, entitled "A Built-in Drive Integrated Permanent Magnet Brushless Motor Structure," discloses a built-in drive integrated permanent magnet brushless motor structure, comprising a front cover, a rear cover, a permanent magnet motor, a wiring harness, and a PCBA board. The permanent magnet motor includes an outer stator, an inner rotor, and a shaft; the outer stator and inner rotor are correspondingly fitted; both the front and rear covers have bearing chambers; the shaft is fixedly connected to the inner rotor, with both ends of the shaft rotatably mounted in the bearing chambers of the front and rear covers via bearings, and one end of the shaft extending from the front cover; the front and rear covers are sealed and fixedly connected, forming a sealed chamber; the permanent magnet motor and the PCBA board are both housed within the sealed chamber. However, the permanent magnet motor generates a large amount of heat during operation, meaning the PCBA board, sharing the same chamber with the permanent magnet motor, will be in a high-temperature environment. Electrical components mounted on the PCBA board will be damaged due to the high temperature, affecting the lifespan of the permanent magnet motor. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a permanent magnet motor with a high protection level that improves service life.

[0004] To achieve the above objectives, the technical solution adopted by the high-protection-level permanent magnet motor of this utility model is as follows:

[0005] A high-protection-level permanent magnet motor includes a partition, a front housing on the front side of the partition, a front cover plate at the front end of the front housing, the front cover plate, the front housing, and the partition forming a motor chamber, a rear housing on the rear side of the partition, a rear cover plate on the rear side of the rear housing, the rear cover plate, the rear housing, and the partition forming a controller chamber, a control module disposed in the controller chamber, a control cable of the control module extending into the motor chamber, an inner through hole for introducing the control cable in the partition, a first rubber ring for sealing the inner through hole on the outer side of the control cable, a power cable of the control module extending out of the controller chamber, an outer through hole for leading out the power cable in the rear housing, a second rubber ring for sealing the outer through hole on the outer side of the power cable, and potting compound for protecting the control module disposed in the controller chamber.

[0006] Preferably, the rear end of the partition is provided with a circular boss that fits into the rear housing, and an inner wire hole is opened on the circular boss. The outer peripheral surface of the circular boss is interference-fitted with the inner peripheral surface of the front side of the rear housing. A sealing gasket is provided between the rear cover and the rear housing. The rear cover, the sealing gasket, and the rear housing are fixedly connected to the partition as a whole by bolts.

[0007] Preferably, the front cover plate is provided with a front annular boss that fits into the front housing, and the outer peripheral surface of the front annular boss is interference-fitted with the front inner peripheral surface of the front housing. The front end of the partition plate is provided with a rear annular boss, and the outer peripheral surface of the rear annular boss is interference-fitted with the rear inner peripheral surface of the front housing. The partition plate and the front housing are fixedly connected to the front cover plate as a whole by bolts.

[0008] Preferably, the front and rear housings and the partition are all made of aluminum alloy, and the outer surfaces of all of them have heat dissipation ribs.

[0009] Preferably, mounting bases are provided on the outer sides of the front and rear housings.

[0010] Compared with the prior art, this utility model has the following advantages:

[0011] The motor chamber and controller chamber are separated by a partition, and the connection between the two is isolated by a first rubber ring, keeping the control module away from the high-temperature environment and protecting the electrical components on the control module from damage due to high temperature, thereby improving the service life of the permanent magnet motor. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the permanent magnet motor with a high protection level according to this utility model.

[0013] Figure 2 This is a top view of the high-protection-level permanent magnet motor of this utility model.

[0014] Figure 3 yes Figure 2 AA sectional view.

[0015] Figure 4 yes Figure 3 Enlarged view of point C.

[0016] Figure 5 yes Figure 3 Enlarged view of point D.

[0017] The components include: 1. partition plate; 11. rear annular boss; 12. circular boss; 13. inner wire hole; 2. front housing; 3. front cover plate; 31. front annular boss; 4. rear housing; 41. outer wire hole; 5. rear cover plate; 6. sealing gasket; 7. mounting base; and 8. control module. Detailed Implementation

[0018] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0019] like Figure 1-5 As shown, a high-protection-level permanent magnet motor includes a partition 1, a front housing 2 mounted on the front side of the partition, a front cover 3 mounted on the front end of the front housing, and a front annular boss 31 machined on the front cover to fit into the front housing. The outer circumferential surface of the front annular boss is interference-fitted with the inner circumferential surface of the front side of the front housing to ensure a tight seal between the front cover and the front housing. A rear annular boss 11 is machined on the front end of the partition, and the outer circumferential surface of the rear annular boss is interference-fitted with the inner circumferential surface of the rear side of the front housing to ensure a tight seal between the front housing and the partition. During installation, the front housing is first pressed against the front cover, and then the partition is pressed onto the front housing. At the rear end, bolts are used to fix the partition and front housing to the front cover plate as a whole. The front cover plate, front housing, and partition plate form the motor chamber. The rear housing 4 is installed on the rear side of the partition plate. A circular boss 12 is machined at the rear end of the partition plate to fit with the rear housing. The outer circumference of the circular boss is interference-fitted with the inner circumference of the front side of the rear housing to ensure the sealing between the partition plate and the rear housing. The rear cover plate 5 is installed at the rear end of the rear housing. The rear cover plate is a thin plate. A sealing gasket 6 is installed between the rear cover plate and the rear housing to ensure the sealing between the rear cover plate and the rear housing. The rear cover plate, sealing gasket, and rear housing are fixed to the partition plate with bolts. The controller chamber is formed by a single unit consisting of a rear cover, a rear housing, and a partition. The outer sides of the front and rear housings are bolted to the mounting base 7 for easy installation. Both the front and rear housings and the partition are made of aluminum alloy and have heat dissipation fins on their outer surfaces to improve heat dissipation in the motor and controller chambers, effectively releasing heat into the air. A control module 8 is installed inside the controller chamber, with its control cable extending into the motor chamber. A circular boss provides an internal cable routing hole 13 for the control cable, and an outer sleeve for sealing the cable. The first rubber ring of the inner cable passage hole allows the power cable of the control module to extend out of the controller chamber. An outer cable passage hole 41 is opened on the side of the rear housing next to the rear cover to lead out the power cable. A second rubber ring is sleeved on the outside of the power cable to seal the outer cable passage hole. The interference fit between the first rubber ring, the second rubber ring, the sealing gasket, and the circular boss with the rear housing ensures the overall sealing of the controller chamber, preventing external water and dust from entering, as well as preventing high-temperature gas from entering the motor chamber. The controller chamber is filled with potting compound to protect the control module, further improving the protection level of the control module.

[0020] The specific working process and principle of this utility model are as follows: A controller chamber for installing the control module is formed separately on the outer side of the motor chamber. The overall sealing of the controller chamber is ensured by the interference fit between the first rubber ring, the second rubber ring, the sealing gasket, and the circular boss with the rear housing. Furthermore, potting compound for protecting the control module is poured into the controller chamber to further improve the protection level of the control module, prevent dust, moisture, and high-temperature gas from entering the motor chamber, and extend the service life of the control module, thereby extending the service life of the permanent magnet motor.

Claims

1. A permanent magnet motor with a high protection level, characterized in that: The device includes a partition, a front housing on the front side of the partition, a front cover plate at the front end of the front housing, the front cover plate, the front housing, and the partition forming a motor chamber. A rear housing on the rear side of the partition, a rear cover plate on the rear side of the rear housing, the rear cover plate, the rear housing, and the partition forming a controller chamber. A control module is housed in the controller chamber. The control cable of the control module extends into the motor chamber. The partition has an inner through hole for introducing the control cable. A first rubber ring is fitted on the outside of the control cable to seal the inner through hole. The power cable of the control module extends out of the controller chamber. The rear housing has an outer through hole for leading out the power cable. A second rubber ring is fitted on the outside of the power cable to seal the outer through hole. The controller chamber contains potting compound to protect the control module.

2. The high-protection-level permanent magnet motor according to claim 1, characterized in that: The rear end of the partition is provided with a circular boss that fits into the rear housing. The inner wire hole is opened on the circular boss. The outer circumferential surface of the circular boss is interference-fitted with the inner circumferential surface of the front side of the rear housing. A sealing gasket is provided between the rear cover and the rear housing. The rear cover, sealing gasket and rear housing are fixed to the partition as a whole by bolts.

3. The high-protection-level permanent magnet motor according to claim 1, characterized in that: The front cover plate is provided with a front annular boss that fits into the front housing. The outer circumferential surface of the front annular boss is interference-fitted with the front inner circumferential surface of the front housing. The front end of the partition plate is provided with a rear annular boss. The outer circumferential surface of the rear annular boss is interference-fitted with the rear inner circumferential surface of the front housing. The partition plate and the front housing are fixedly connected to the front cover plate as a whole by bolts.

4. The high-protection-level permanent magnet motor according to claim 1, characterized in that: The front and rear housings and partitions are all made of aluminum alloy, and the outer surfaces of all of them have heat dissipation ribs.

5. The high-protection-level permanent magnet motor according to claim 1, characterized in that: Mounting bases are provided on the outer sides of the front and rear housings.

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