Direct connection type permanent magnet motor

Abstract

The utility model discloses a direct connection type permanent magnet motor. The direct connection type permanent magnet motor comprises a casing, a rotating shaft is arranged in the casing, a first bearing sleeves a journal at one end of the rotating shaft, a second bearing sleeves a journal at the other end of the rotating shaft, the rotating shaft is pivoted with the casing through the first bearing and the second bearing, a rotor assembly sleeves the middle of the rotating shaft, a stator assembly sleeves the outer side of the rotor assembly, and the stator assembly is fixedly connected with the casing. The end face of one side of the rotating shaft exposed out of the casing is provided with an interface. According to the utility model, the problem of low cost performance in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a direct-drive permanent magnet motor. Background Technology

[0002] Currently, tire changers typically use asynchronous motors that are driven by belts. However, this process results in energy loss, low transmission efficiency, and high energy consumption. Friction between the belt and transmission components generates noise, which increases further with wear and tear over time. As a wear part, the belt requires regular replacement, which undoubtedly increases operating costs and reduces the overall cost-effectiveness. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a direct-drive permanent magnet motor with high cost performance.

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

[0005] A direct-drive permanent magnet motor includes a housing, a rotating shaft disposed inside the housing, a first bearing sleeved on one end of the rotating shaft journal, a second bearing sleeved on the other end of the rotating shaft journal, the rotating shaft being pivotally connected to the housing via the first and second bearings, a rotor assembly sleeved on the middle of the rotating shaft, a stator assembly sleeved on the outer side of the rotor assembly, the stator assembly being fixedly connected to the housing, and an insertion interface being provided on one end face of the rotating shaft protruding from the housing.

[0006] Preferably, the insertion interface is a circular blind hole, and the side wall of the circular blind hole has an inner keyway parallel to its axis.

[0007] Preferably, the bottom surface of the inner keyway is provided with a vent hole, which is close to the closed end of the circular blind hole.

[0008] Preferably, the outer peripheral surface of the rotating shaft and the inner peripheral surface of the rotor assembly are interference fit, the outer peripheral surface of the rotating shaft is provided with an external keyway, and the rotor assembly is provided with a boss that inserts into the external keyway.

[0009] Preferably, the outer peripheral surface of the rotating shaft is provided with a limiting boss for blocking the rotor assembly.

[0010] Preferably, the housing includes a housing assembled with the rotor assembly by interference fit of the inner circumferential surface, a front cover plate is provided at one end of the housing and a rear cover plate is provided at the other end, the front cover plate has a front bearing cavity for accommodating the first bearing and the rear cover plate has a rear bearing cavity for accommodating the second bearing.

[0011] Preferably, the front cover plate is provided with a front annular boss that fits into the housing, and the outer peripheral surface of the front annular boss is interference-fitted with the inner peripheral surface of the front side of the housing. The rear cover plate is provided with a rear annular boss that fits into the housing, and the outer peripheral surface of the rear annular boss is interference-fitted with the inner peripheral surface of the rear side of the housing. The rear cover plate and the housing are fixedly connected to the front cover plate as a whole by bolts.

[0012] Preferably, the front cover plate has several bolt holes.

[0013] Preferably, the outer side wall of the housing is provided with a plurality of heat dissipation ribs.

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] By opening an interface on the shaft, it can be directly connected to the gearbox on the tire changer, eliminating the need for a belt, avoiding energy loss, resulting in high transmission efficiency, low energy consumption, and greater energy saving. In addition, noise is reduced, and there is no need to replace the belt. Although the initial investment cost is high, the failure rate and maintenance cost are low in the later stage, making it more cost-effective. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the direct-drive permanent magnet motor of this utility model.

[0017] Figure 2 This is an exploded view of the direct-drive permanent magnet motor of this utility model.

[0018] Figure 3 This is an assembly diagram of the shaft and rotor assembly.

[0019] Figure 4 yes Figure 3 AA sectional view.

[0020] Figure 5 This is a structural diagram of the front cover.

[0021] Figure 6 This is a structural diagram of the rear cover.

[0022] Among them, 1 is the housing, 11 is the shell, 111 is the heat dissipation fins, 12 is the front cover plate, 121 is the bolt through hole, 122 is the front bearing cavity, 123 is the front annular boss, 13 is the rear cover plate, 131 is the rear bearing cavity, 132 is the rear annular boss, 14 is the bolt, 2 is the rotating shaft, 21 is the external keyway, 22 is the limiting boss, 23 is the insertion interface, 24 is the internal keyway, 25 is the vent hole, 3 is the first bearing, 4 is the second bearing, 5 is the rotor assembly, 51 is the boss, and 6 is the stator assembly. Detailed Implementation

[0023] 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.

[0024] like Figure 1-6 As shown, a direct-drive permanent magnet motor includes a housing 1, which includes a shell 11. Several heat dissipation ribs 111 are integrally formed on the outer side wall of the shell to improve heat dissipation. A front cover plate 12 is installed at the front end of the shell. A bolt through hole 121 is provided at each of the four corners of the front cover plate to facilitate direct installation on the gearbox housing. A front bearing cavity 122 is located in the middle of the front cover plate. A front annular boss 123 is integrally formed around the front bearing cavity on the front cover plate. The outer circumferential surface of the front annular boss is interference-fitted with the inner circumferential surface of the front side of the shell. A rear cover plate 13 is installed at the rear end of the shell. A rear bearing cavity 131 is located in the middle of the rear cover plate. The surrounding annular boss 132 is integrally formed. The outer circumferential surface of the rear annular boss is interference-fitted with the inner circumferential surface of the rear side of the housing. The rear cover plate and the housing are fixed to the front cover plate as a whole by bolts 14. The interference fit at both ends of the housing can ensure the sealing of the housing and provide good dust and water resistance. The rotating shaft 2 is installed inside the housing. The journal at the front end of the rotating shaft is sleeved with the first bearing 3. The inner circumferential surface of the inner ring of the first bearing is interference-fitted with the outer circumferential surface of the journal at the front end of the rotating shaft. The outer circumferential surface of the outer ring of the first bearing is interference-fitted with the inner circumferential surface of the front bearing cavity. The journal at the rear end of the rotating shaft is sleeved with the second bearing 4. The inner circumferential surface of the inner ring of the second bearing is interference-fitted with the outer circumferential surface of the journal at the rear end of the rotating shaft. The outer circumferential surface of the bearing outer ring is interference-fitted with the inner circumferential surface of the rear bearing cavity. The shaft is pivotally connected to the housing via the first and second bearings. The rotor assembly 5 is sleeved in the middle of the shaft. The outer circumferential surface of the shaft and the inner circumferential surface of the rotor assembly are interference-fitted. An external keyway 21 is formed on the outer circumferential surface of the shaft. A boss 51 integrally formed on the rotor assembly is inserted into the external keyway. The boss inserted into the external keyway ensures that the rotor assembly and the shaft will not loosen or fall off during operation, thereby ensuring stable and reliable power transmission between the rotor assembly and the shaft. A limiting boss 22 is machined on the side of the outer circumferential surface of the middle of the shaft adjacent to the front journal to block the rotor assembly. When the rotor assembly abuts against the limiting boss... When the rotor assembly and shaft are assembled in place, the stator assembly 6 is sleeved on the outside of the rotor assembly. The stator assembly is assembled with an interference fit to the inner circumferential surface of the housing. The front end of the shaft has an insertion interface 23 on one side of the front cover plate. The insertion interface is a circular blind hole, which is easy to process. An inner keyway 24 parallel to its axis is opened on the side wall of the circular blind hole. The shaft can transmit torque to the input shaft of the gearbox by inserting a flat key into the inner keyway. A vent hole 25 is opened on the bottom surface of the inner keyway. The vent hole is close to the closed end of the circular blind hole. When the gearbox input shaft is inserted into the insertion interface, the air in the circular blind hole is discharged from the vent hole, thus facilitating the insertion of the gearbox input shaft.

[0025] The specific working process and principle of this utility model are as follows: The connector is sleeved with the worm gear of the gearbox, and the flat key mounted on the worm gear is inserted into the inner keyway. The direct-drive permanent magnet motor of this utility model is fixed to the outside of the gearbox housing that matches this utility model through the bolt holes. After power is applied, the rotor assembly drives the rotating shaft to rotate, and the rotating shaft drives the worm gear to rotate. Since the belt is eliminated, energy loss is avoided, resulting in high transmission efficiency, low energy consumption, and greater energy saving. The starting torque is large, and there will be no problem with poor starting. It is small in size and light in weight. In addition, the noise is reduced, and there is no need to replace the belt. Although the initial investment cost is high, the failure rate and maintenance cost are low in the later stage, so the cost performance is higher.

Claims

1. A direct-drive permanent magnet motor, characterized in that: The device includes a housing, inside which a rotating shaft is installed. A first bearing is sleeved on the journal at one end of the rotating shaft, and a second bearing is sleeved on the journal at the other end. The rotating shaft is pivotally connected to the housing through the first and second bearings. A rotor assembly is sleeved in the middle of the rotating shaft, and a stator assembly is sleeved on the outside of the rotor assembly. The stator assembly is fixedly connected to the housing. An insertion interface is provided on the side of the rotating shaft that protrudes from the housing.

2. The direct-drive permanent magnet motor according to claim 1, characterized in that: The insertion interface is a circular blind hole, and the side wall of the circular blind hole has an inner keyway parallel to its axis.

3. The direct-drive permanent magnet motor according to claim 2, characterized in that: The bottom surface of the inner keyway is provided with a vent hole, which is close to the closed end of the circular blind hole.

4. The direct-drive permanent magnet motor according to claim 1, characterized in that: The outer circumferential surface of the rotating shaft and the inner circumferential surface of the rotor assembly are interference fit. The outer circumferential surface of the rotating shaft is provided with an external keyway, and the rotor assembly is provided with a boss that inserts into the external keyway.

5. The direct-drive permanent magnet motor according to claim 4, characterized in that: The outer circumferential surface of the rotating shaft is provided with a limiting boss that blocks the rotor assembly.

6. The direct-drive permanent magnet motor according to claim 1, characterized in that: The housing includes a housing whose inner circumferential surface is assembled with the rotor assembly by interference fit. One end of the housing is provided with a front cover plate and the other end is provided with a rear cover plate. The front cover plate has a front bearing cavity for accommodating a first bearing and the rear cover plate has a rear bearing cavity for accommodating a second bearing.

7. The direct-drive permanent magnet motor according to claim 6, characterized in that: The front cover plate is provided with a front annular boss that fits into the housing. The outer circumferential surface of the front annular boss is interference-fitted with the inner circumferential surface of the front side of the housing. The rear cover plate is provided with a rear annular boss that fits into the housing. The outer circumferential surface of the rear annular boss is interference-fitted with the inner circumferential surface of the rear side of the housing. The rear cover plate and the housing are fixedly connected to the front cover plate as a whole by bolts.

8. The direct-drive permanent magnet motor according to claim 7, characterized in that: The front cover plate has several bolt holes.

9. The direct-drive permanent magnet motor according to claim 7, characterized in that: The outer wall of the housing is provided with several heat dissipation ribs.

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