Rotary transformer stator retainer ring for rotary transformer and motor

Abstract

The utility model relates to a resolver stator retainer ring (1) for a resolver of a motor, the resolver stator retainer ring (1) can fix a resolver stator (3) of the resolver in a motor shell (2) of the motor, and the resolver stator retainer ring (1) has an open annular structure and can be fixedly connected with the motor shell (2) in a shape matching manner. Wherein the resolver stator retainer ring (1) is provided with a clamping jaw part (11) and a locking part (12), the clamping jaw part (11) is used for fixing the resolver stator (3), and the locking part (12) is used for preventing the resolver stator (3) from rotating.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to the design of a rotary transformer stator retaining ring for a rotary transformer of a motor. Background Art

[0002] In traditional motor design, a rotary transformer is used to measure the rotation speed and other operating parameters of the motor rotor. The rotary transformer generally includes a rotary transformer stator and a rotary transformer rotor, wherein the rotary transformer stator is fixedly mounted on the motor housing. Conventional fixing methods involve multiple parts, such as stator pressure plates, bolts, and rectangular keys. For example, a method for assembling a rotary transformer and a motor vibration structure are known from CN 116345803 A, wherein the rotary transformer stator assembly is fixed to the rear end cover of the motor, the rear end cover of the motor is provided with a boss, the rotary transformer stator assembly is sleeved outside the boss, the boss is used to ensure the concentricity of the rotary transformer stator assembly when the rotary transformer stator assembly is rotated left and right, a waist-shaped hole is provided on the rotary transformer stator assembly, and the rotary transformer stator assembly is fixed to the rear end cover of the motor by screws, and the screws are fixed to the rear end cover of the motor after passing through the waist-shaped hole.

[0003] As known from the prior art, fixing the resolver stator requires multiple components, which not only increase the manufacturing cost but also complicate the assembly process. In addition, the installation and maintenance of these components require a long process cycle time, thereby reducing production efficiency. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an improved rotary transformer stator retaining ring, which can solve the shortcomings of the above-mentioned prior art through a special design.

[0005] The above technical problems are solved by a resolver stator retaining ring designed according to the utility model. The resolver stator retaining ring is used to fix the resolver stator of the motor resolver. The resolver stator retaining ring is designed as an open ring structure, which can form a shape-fitting fixed connection with the motor housing, thereby fixing the resolver stator. The resolver stator retaining ring according to the utility model is provided with a claw portion for clamping the resolver stator, and a locking portion for preventing the resolver stator from rotating. The resolver stator retaining ring designed according to the utility model replaces the three parts of the original design with one component through a special design, and achieves the same function, thereby simplifying the fixing structure of the resolver stator. This technical solution improves production efficiency, reduces costs, and provides a good fixing effect by reducing the number of parts and simplifying the assembly process.

[0006] According to a preferred embodiment of the utility model, the resolver stator retaining ring has two ears at the opening, which provides convenience for installing and positioning the resolver stator. Further preferably, a tooling hole is provided on each ear, through which the resolver stator retaining ring can be more conveniently operated using tools, further simplifying the installation process and making positioning more accurate and quick.

[0007] According to a preferred embodiment of the utility model, the rotary stator retaining ring has a plurality of claw portions, for example, 3 or 4, and the claw portions can be evenly distributed on the circumference of the rotary stator retaining ring. The plurality of claw portions can enhance the fixation of the rotary stator and provide a plurality of uniform fixing points, thereby forming a stable fixation of the rotary stator on the entire circumference. It is further preferred that the claw portion is elastic and tilted in the direction of the rotary stator. The elastic claw portion can provide better holding force under mechanical vibration, and the downward tilt to increase a certain preload can enable the claw portion to maintain continuous pressure on the rotary stator. Elastic materials can usually withstand more assembly and disassembly cycles without damage. This means that the retaining ring can be reused when maintaining or replacing the rotary stator, thereby extending its service life. It is also preferred that the claw portion gradually thins and extends toward the center of the rotary stator retaining ring. The gradually thinning design can not only reduce the material consumption and component weight, but also increase elasticity, thereby reducing material costs while achieving stable fixation. It is also possible to consider that the claw portion has a recess and / or a hollow, which reduces the use of materials, thereby reducing the weight of the claw portion and the entire retaining ring. The recessed or hollowed design can make the claw portion more flexible, so that it can better adapt to the shape and size of the resolver stator during installation and provide a tighter fixation. In addition, the recessed and hollowed design can also improve air circulation, help the motor dissipate heat, and thus improve the performance and reliability of the entire system.

[0008] According to a preferred embodiment of the utility model, the diameter of the resolver stator retaining ring does not exceed 60 mm, and the thickness does not exceed 2 mm. The resolver stator designed according to the utility model is more suitable for small-sized motors and more suitable for compact spaces. In addition, preferably, the resolver stator retaining ring has a bottom opposite to the opening, and the thickness of the bottom is greater than the opening of the resolver stator retaining ring. The thickened bottom provides elastic force for the opening and closing of the resolver stator retaining ring, thereby improving the detachability of the resolver stator retaining ring.

[0009] The technical problem of the utility model can also be solved by a motor. The motor includes a resolver stator retaining ring having the above technical features. The motor designed according to the utility model uses a new resolver stator retaining ring to fix the resolver stator, has higher reliability and production efficiency, and lower manufacturing and maintenance costs, and overcomes the problems of complex traditional fixing structure, multiple components, high cost, and difficult assembly.

[0010] The utility model provides a new type of resolver stator fixing solution with high cost-effectiveness, simple assembly and good stability. The design of the retaining ring takes into account the durability and reliability during the operation of the motor, reduces the maintenance requirements and prolongs the service life of the equipment. By integrating the design of the claw part and the locking part, the retaining ring not only provides stable support when fixing the resolver stator, but also prevents the resolver stator from shifting due to vibration or other external influences. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0012] Figure 1 A stereoscopic view of a resolver stator retaining ring 1 designed according to the utility model is shown;

[0013] Figure 2 The figure shows a three-dimensional schematic diagram obtained after the resolver stator retaining ring 1 is assembled. DETAILED DESCRIPTION

[0014] Figure 1 A resolver stator retaining ring 1 of a resolver is shown, which is specially designed for positioning and fixing a resolver stator 3 of a resolver in a motor. The overall shape of the resolver stator retaining ring 1 is an incompletely closed ring structure, which is suitable for surrounding and fastening the resolver stator 3. The opening of the resolver stator retaining ring 1 can provide better elasticity, and is fixedly connected with the motor housing 2 of the motor in a form-fitting manner, thereby fixing the resolver stator 3.

[0015] The main part of the resolver stator retaining ring 1 is made of a flat metal material and is processed into a specific shape by stamping or cutting. A plurality of claw portions 11 are provided along the inner circumference of the resolver stator retaining ring 1, which are evenly distributed on the inner circumference of the rotating stator retaining ring 1. These claw portions 11 are designed to be elastic and tilted inward so that the resolver stator can be fixed by pressing when assembled into the motor housing. The number, spacing and angle of the claw portions are precisely calculated to ensure the fixing effect and easy assembly. The claw portion 11 can be designed to gradually become thinner and extend toward the center of the circle, which increases the elasticity while reducing the weight, ensuring that it can provide stable fixation during the operation of the motor. In addition, the claw portion 11 can also be provided with a recess or hollowing to further reduce the weight of the retaining ring itself and simplify the use of materials. This design does not affect the structural strength and function of the resolver stator retaining ring 1, and can increase its elasticity and heat dissipation performance.

[0016] Two ears 13 are provided at the opening of the resolver stator retaining ring 1 , and each ear 13 is provided with a tool hole 14 , which can be used for installation or positioning by tools. The existence of the ears 13 facilitates the installation of the resolver stator retaining ring 1 .

[0017] The resolver stator retaining ring 1 also has a locking portion 12 for preventing the resolver stator from rotating. These locking portions may be protruding protrusions or grooves adapted to the shape of the resolver stator, and they limit the rotation of the resolver stator 3 by shape matching. The locking portion 12 is arranged on the bottom 15 opposite to the opening of the resolver stator retaining ring 1. In the circumferential direction of the resolver stator retaining ring 1, the bottom 15 is the thickest part, and gradually becomes thinner from the bottom 15 toward the opening, so that the bottom 15 can provide stronger elastic support for the opening.

[0018] Figure 2 The figure shows a three-dimensional schematic diagram after the resolver stator retaining ring 1 is installed. After the resolver stator retaining ring 1 is installed in cooperation with the motor housing 2, the resolver stator 3 is fixed to the motor housing 2 by the resolver stator retaining ring 1. The claw portion 11 is pressed tightly on the resolver stator 3, and the locking portion 12 is matched with the corresponding groove of the resolver stator 3, which effectively prevents the resolver stator 3 from rotating during the operation of the motor.

[0019] In this embodiment, the design of the resolver stator retaining ring 1 fully considers the convenience of the motor assembly process, while ensuring the stable installation of the resolver stator 3, improving the reliability and durability of the resolver stator retaining ring, reducing the frequency and cost of maintenance, and utilizing an integrated design to reduce the number of components, improve assembly efficiency, reduce manufacturing costs, and increase the overall reliability of the product.

[0020] Reference numerals list

[0021] 1 Rotary stator retaining ring

[0022] 2 Motor housing

[0023] 3. Resolver stator

[0024] 11. Claw

[0025] 12 Locking part

[0026] 13 Ear

[0027] 14 Tooling holes

[0028] 15 Bottom

Claims

1. A resolver stator retaining ring (1) for a rotary transformer of an electric motor, wherein the resolver stator retaining ring (1) can fix a resolver stator (3) of the rotary transformer in a motor housing (2) of the electric motor, wherein the resolver stator retaining ring (1) has an open ring structure and can be fixedly connected to the motor housing (2), wherein: The resolver stator retaining ring (1) comprises a claw portion (11) and a locking portion (12), wherein the claw portion (11) is used to press the resolver stator (3), and the locking portion (12) is used to prevent the resolver stator (3) from rotating.

2. The resolver stator retaining ring (1) according to claim 1, characterized in that: The resolver stator retaining ring (1) has two ears (13) at the opening.

3. The resolver stator retaining ring (1) according to claim 2, characterized in that: A tooling hole (14) is provided on each ear portion (13).

4. The resolver stator retaining ring (1) according to claim 1, characterized in that: The resolver stator retaining ring (1) has a plurality of claw portions (11), and the claw portions (11) are distributed on the circumference of the resolver stator retaining ring (1).

5. The resolver stator retaining ring (1) according to claim 4, characterized in that: The claw portion (11) is elastic and inclined toward the direction of the rotary stator.

6. The resolver stator retaining ring (1) according to claim 4 or 5, characterized in that: The claw portion (11) gradually becomes thinner and extends towards the center of the resolver stator retaining ring (1).

7. The resolver stator retaining ring (1) according to claim 4 or 5, characterized in that: The claw portion (11) has a recess and / or a hollow.

8. The resolver stator retaining ring (1) according to claim 1, characterized in that: The resolver stator retaining ring (1) has a diameter not exceeding 60 mm and a thickness not exceeding 2 mm.

9. The resolver stator retaining ring (1) according to claim 1, characterized in that: The resolver stator retaining ring (1) has a bottom (15) opposite to the opening, and the thickness of the bottom (15) is greater than the opening of the resolver stator retaining ring (1).

10. A motor, characterized in that: The electric motor comprises a resolver stator retaining ring (1) according to any one of claims 1 to 9.

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