CN218633656U

CN218633656U - Permanent magnet synchronous motor

Info

Publication number: CN218633656U
Application number: CN202222611759.6U
Authority: CN
Inventors: 姜伟; 赵志强; 张晓磊; 胡金萍; 马强; 李奥; 朱贺
Original assignee: Xuzhou Shengbang Machinery Co Ltd
Current assignee: Xuzhou Shengbang Machinery Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-03-14
Anticipated expiration: 2032-09-30

Abstract

The utility model discloses a permanent magnet synchronous motor belongs to motor technical field, including permanent magnet synchronous motor casing, rear end cap and motor shaft, the motor shaft includes the rotor, terminal surface is connected with straight mouthful in the permanent magnet synchronous motor casing, the second recess has been seted up to the up end of straight mouthful, the joint has the sealing washer in the second recess, a side end face is connected with the second tang in the permanent magnet synchronous motor casing, the first tang of second tang fixedly connected with, the third recess has been seted up between second tang and the first tang, the joint has sealed the pad in the third recess, first sealed pad deformation space and the sealed pad deformation space of second have been seted up respectively on the relative terminal surface in both sides that second tang and first tang were located sealed pad. The utility model discloses the realization is waterproof to PMSM's enhancement, and the difficult condition that takes place PMSM meets water and causes the unable use of motor or motor internals to damage.

Description

Permanent magnet synchronous motor

Technical Field

The utility model belongs to the technical field of the motor, concretely relates to permanent magnet synchronous motor.

Background

With the vigorous development of new energy application and popularization in China, the electromotion of the forklift truck is a necessary trend. By taking clean energy as an entry point, the requirement of national green energy science and technology enabling engineering machinery industrialization development policy is responded, all host factories push the process of changing oil into electricity of a forklift series product, the green energy concept is continuously pushed to fall to the ground, the domestic forklift is jointly pushed to develop towards a higher-end, more environment-friendly and more intelligent direction, and the forklift is driven to run by using a permanent magnet synchronous motor.

PMSM mainly comprises rear end housing, motor shaft (containing the rotor), stator and stopper, and PMSM waterproof performance among the prior art is poor, in case the motor meets water, easily causes the unable normal use of motor, and in the serious time, easily causes the damage of motor internals, causes the loss of people's property.

Therefore, in view of the above technical problems, it is necessary to provide a permanent magnet synchronous motor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a permanent magnet synchronous motor to solve foretell problem.

In order to achieve the above object, an embodiment of the present invention provides the following technical solutions:

a permanent magnet synchronous motor comprises a permanent magnet synchronous motor shell, a rear end cover and a motor shaft, wherein the motor shaft comprises a rotor, a straight opening is connected to the inner end face of the permanent magnet synchronous motor shell, a second groove is formed in the upper end face of the straight opening, and a sealing ring is clamped in the second groove;

the end face of one side in the permanent magnet synchronous motor shell is connected with a second spigot, a first spigot of the second spigot fixedly connected with, a third groove is arranged between the second spigot and the first spigot, a sealing gasket is connected in the third groove in a clamping manner, and a first sealing gasket deformation space and a second sealing gasket deformation space are respectively arranged on the opposite end faces of the two sides of the second spigot and the first spigot, which are positioned on the sealing gasket.

As a further improvement of the utility model, a plurality of fins of permanent magnet synchronous motor casing periphery fixedly connected with.

As a further improvement of the utility model, the motor shaft is connected with the rotor, the equal interference fit of first tang and second tang has the stator.

As a further improvement, the permanent magnet synchronous motor casing is internally provided with a rear end cover near the rotor, the rear end cover is internally connected with a bearing, and a first groove is arranged on the bottom end face of the rear end cover.

As a further improvement of the utility model, the rear end cover rear end face is connected with a brake shell.

As a further improvement, a fourth groove has been seted up to motor shaft bottom terminal surface, fourth groove in-connection has the spacer.

As a further improvement, the magnet block is stored in the spacer sleeve, and the end face at the outer side of the brake shell is connected with the magnetic encoder circuit board.

As a further improvement, permanent magnet synchronous motor casing up end is connected with the terminal box upper cover, the terminal box upper cover is opened and is equipped with three phase current supply wire hole and signal wire hole, the signal wire hole includes magnetic encoder signal outlet, stopper signal wire hole.

Compared with the prior art, the utility model has the advantages of it is following:

the utility model discloses the realization is waterproof to PMSM's enhancement, and difficult PMSM that takes place runs into water and causes the unable condition that uses or motor internals damaged of motor.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a permanent magnet synchronous motor according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a permanent magnet synchronous motor according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a position a in fig. 2 according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a portion B of fig. 2 according to an embodiment of the present invention.

In the figure: 1. stator, 2, junction box upper cover, 3, brake shell, 4, rear end cover, 6, magnetic encoder circuit board, 7, spacer, 8, first groove 9, a bearing, 10, a permanent magnet synchronous motor shell, 11, a motor shaft, 12, a rotor, 13, a second groove, 14, a straight port 15, a first spigot, 16, a sealing gasket, 17, a second spigot, 18, a signal outlet hole, 19, a three-phase power outlet hole, 20, a fin, 21, a sealing ring, 22, a first sealing gasket deformation space, 23, a second sealing gasket deformation space, 24, a third groove, 25 and a fourth groove.

Detailed Description

The present invention will be described in detail below with reference to embodiments shown in the drawings. However, the present invention is not limited to the embodiments, and the structural, method, or functional changes made by those skilled in the art according to the embodiments are all included in the scope of the present invention.

An embodiment of the utility model discloses a permanent magnet synchronous motor, it is shown with reference to fig. 1-2, including permanent magnet synchronous motor casing 10, rear end housing 4 and motor shaft 11, motor shaft 11 includes rotor 12, realizes the drive to cutting the fork truck.

Referring to fig. 1 to 3, a straight opening 14 is connected to an inner end surface of a permanent magnet synchronous motor housing 10, a second groove 13 is formed in the upper end surface of the straight opening 14, and a seal ring 21 is connected to the inside of the second groove 13 in a clamping manner, so that water is prevented from flowing into the permanent magnet synchronous motor housing 10, and damage to internal parts of the permanent magnet synchronous motor housing 10 or abnormal use of the motor are avoided.

Referring to fig. 1-4, a side end face in the permanent magnet synchronous motor shell 10 is connected with a second spigot 17, the second spigot 17 is fixedly connected with a first spigot 15, the accurate positioning connection of the stator 1 is convenient, the motor shaft 11 is connected with the rotor 12, the first spigot 15 and the second spigot 17 are in interference fit with the stator 1, namely, the stator 1 is in interference fit with the permanent magnet synchronous motor shell 10 through the first spigot 15 and the second spigot 17 on the permanent magnet synchronous motor shell 10, the limitation of the stator 1 is realized, and the connection of the stator 1 and the permanent magnet synchronous motor shell 10 is strengthened.

Referring to fig. 1 to 4, a third groove 24 is formed between the second seam allowance 17 and the first seam allowance 15, a sealing gasket 16 is clamped in the third groove 24, and a first sealing gasket deformation space 22 and a second sealing gasket deformation space 23 are respectively formed on opposite end surfaces of the second seam allowance 17 and the first seam allowance 15, which are located on two sides of the sealing gasket 16.

Specifically, when the sealing gasket 16 in the third groove 24 is compressed tightly on the brake housing 3, the sealing gasket 16 is filled into the first sealing gasket deformation space 22 and the second sealing gasket deformation space 23 after the sealing gasket 16 is deformed by a force, so that the permanent magnet synchronous motor housing 10 is reinforced and waterproof, the waterproof grade is improved, and the whole appearance is attractive. Referring to fig. 1 to 4, a plurality of fins 20 are fixedly connected to an outer end surface of a permanent magnet synchronous motor housing 10, so that heat dissipation of the motor is enhanced, and the motor cannot be normally used due to too high heat is not easy to occur.

Referring to fig. 1 to 4, a rear end cap 4 is connected to a position near a rotor 12 in a permanent magnet synchronous motor housing 10, so as to implement hidden installation of the rear end cap 4, the rear end cap 4 is installed inside the permanent magnet synchronous motor housing 10, and the installation of the rear end cap 4 and the exterior of the permanent magnet synchronous motor housing 10 are different from those in the prior art.

Referring to fig. 1 to 4, a bearing 9 is connected in the rear end cover 4, the bearing 9 is located at the center of the rear end cover 4, a first groove 8 is formed in the bottom end face of the rear end cover 4, a rotary transformer is installed in the first groove 8, the rotary transformer is mainly used for measuring the angular displacement and the angular velocity of a rotor, the first groove 8 is a reserved space for installing the rotary transformer, and whether the rotary transformer is installed in the first groove 8 is selected according to the requirements of a user.

Referring to fig. 1 to 4, the brake housing 3 is connected to the rear end face of the rear end cover 4, so that the number of components of the motor housing is greatly reduced, the number of external mounting surfaces of the permanent magnet synchronous motor housing 10 is reduced as much as possible, the characteristics of high efficiency and large starting torque of the permanent magnet synchronous motor are fully utilized, the overall waterproof performance is improved, the effects of stable output, energy conservation, environmental protection and high reliability are finally achieved, the assembly is convenient, the work is more reliable, and the service life is longer.

Referring to fig. 1 to 4, a fourth groove 25 is formed in the end face of the bottom of the motor shaft 11, a spacer 7 is connected in the fourth groove 25, a magnet block is stored in the spacer 7, and a magnetic encoder circuit board 6 is connected to the end face of the outer side of the brake housing 3 to match the magnetic encoder circuit board 6 installed on the outer side of the brake, so that the angular displacement and the angular velocity of the rotor can be measured, and the scheme of rotating deformation can be replaced.

Referring to fig. 1 to 4, a terminal box upper cover 2 is connected to an upper end surface of a permanent magnet synchronous motor housing 10, a three-phase power outlet hole 19 and a signal outlet hole 18 are formed in the terminal box upper cover 2, and the signal outlet hole 18 includes a magnetic encoder signal outlet and a brake signal outlet hole. PG joints are respectively arranged on the signal outlet hole 18 and the three-phase power outlet hole 19 to limit the three-phase power line, the brake signal line and the magnetic encoder signal line

In and out.

Wherein 2 up end of terminal box upper cover can set up information such as data plate and enterprise logo of mark motor information, and 2 up ends of terminal box upper cover can change as required for signal connectors such as three-phase power terminal and encoder, stopper.

During the use, as shown in fig. 1-4, firstly, the sealing ring 21 is clamped in the second groove 13 to strengthen the waterproof performance of the motor, secondly, when the brake shell 3 is tightly pressed through the sealing gasket 16 in the third groove 24, the sealing gasket 16 is filled in the first sealing gasket deformation space 22 and the second sealing gasket deformation space 23 after the sealing gasket 16 is deformed under stress, further strengthening the waterproof performance of the motor is realized, the strengthening of the whole waterproof performance of the motor is improved, and when the motor operates, the heat is radiated through the fins 20, the heat radiation performance of the motor is improved, and the continuous working time of the forklift is prolonged.

According to the technical scheme provided by the utility model, the utility model discloses following beneficial effect has:

the advantage of this patent is the parts of the motor casing that have significantly reduced, reduces outside composition surface, and waterproof performance is better, and convenient assembling, and work is more reliable, and life is longer, adopts permanent magnet synchronous motor, and efficiency can reach about 85%, surpasss 90% even, and very big energy can be saved improves the continuous operation time of cutting the fork truck.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the specification has been described in terms of embodiments, not every embodiment includes every single embodiment, and such description is for clarity purposes only, and it will be appreciated by those skilled in the art that the specification as a whole can be combined as appropriate to form other embodiments as will be apparent to those skilled in the art.

Claims

1. A permanent magnet synchronous motor comprises a permanent magnet synchronous motor shell, a rear end cover and a motor shaft, wherein the motor shaft comprises a rotor, and the permanent magnet synchronous motor is characterized in that a straight opening is connected to the inner end face of the permanent magnet synchronous motor shell, a second groove is formed in the upper end face of the straight opening, and a sealing ring is clamped in the second groove;

the permanent magnet synchronous motor shell is characterized in that a second spigot is connected to the end face of one side in the permanent magnet synchronous motor shell, a first spigot is fixedly connected to the second spigot, a third groove is formed between the second spigot and the first spigot, a sealing gasket is connected to the third groove in a clamping mode, and a first sealing gasket deformation space and a second sealing gasket deformation space are formed in the second spigot and the first spigot on the opposite end faces of the two sides of the sealing gasket respectively.

2. The PMSM of claim 1, wherein a plurality of fins are fixedly attached to the outer end surface of the PMSM housing.

3. The PMSM of claim 1, wherein the motor shaft has a rotor attached thereto, and the first and second spigots have stators that are interference fit.

4. The permanent magnet synchronous motor according to claim 1, wherein a rear end cover is connected to the permanent magnet synchronous motor casing near the rotor, a bearing is connected to the rear end cover, and a first groove is formed in the bottom end face of the rear end cover.

5. The PMSM of claim 4, wherein a brake housing is attached to a rear end face of the rear end cap.

6. The permanent magnet synchronous motor according to claim 5, wherein a fourth groove is formed in the end surface of the bottom of the motor shaft, and a spacer bush is connected in the fourth groove.

7. The permanent magnet synchronous motor according to claim 6, wherein a magnet block is stored in the spacer bush, and a magnetic encoder circuit board is connected to an outer end face of the brake housing.

8. The PMSM of claim 1, wherein a junction box upper cover is connected to an upper end face of the PMSM shell, a three-phase power outlet hole and a signal outlet hole are formed in the junction box upper cover, and the signal outlet hole comprises a magnetic encoder signal outlet and a brake signal outlet hole.