Armature structure

Abstract

This utility model relates to the field of armatures, and more particularly to an armature structure, comprising a first armature, a second armature, and several spring pieces. The two ends of each spring piece are respectively connected to the first armature and the second armature, allowing the first and second armatures to move elastically along their own axial direction. By using multiple independent spring pieces to separately connect the first and second armatures, a distributed elastic support structure is formed. When the working clearance increases due to friction plate wear, this structure can automatically compensate for the clearance change through a wider range of elastic deformation of the spring pieces, ensuring that the armature can always effectively engage, significantly improving long-term operational reliability and tolerance to wear.

Description

Technical Field

[0001] This utility model relates to the field of armatures, and more particularly to an armature structure. Background Technology

[0002] Currently, common armature structures generally use a single, integrally molded ring-shaped spring (or spring ring) to connect and provide the restoring force. This design has inherent drawbacks:

[0003] 1. Poor stroke compensation capability: The deformation characteristics of an integrated spring ring are relatively fixed and uniform. When the friction plate wears due to long-term use, resulting in an increase in the effective stroke required for engagement, the integrated spring ring cannot provide sufficient adaptive elastic deformation to compensate for this increased clearance. This can lead to incomplete engagement, reduced braking force, or even failure, affecting long-term operational reliability.

[0004] 2. Uneven stress distribution, prone to fatigue damage: During repeated engagement and disengagement, the stress in the integrated spring ring tends to concentrate in specific areas of the ring structure (such as the root or bending parts), rather than being evenly distributed. This stress concentration phenomenon easily leads to fatigue damage to the material, causing the spring ring to break and shortening the overall service life of the device.

[0005] 3. High manufacturing and assembly requirements: To ensure uniform force distribution and smooth operation of the integrated spring ring after installation, extremely stringent requirements are placed on the parallelism, flatness, and assembly accuracy of the armature component mounting surfaces. This increases the complexity and cost of manufacturing. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides an armature structure that uses multiple independent spring pieces to connect the first and second armatures, forming a distributed elastic support structure. When the friction plates wear and cause an increase in the working clearance, this structure can automatically compensate for the clearance change through a wider range of elastic deformation of the spring pieces.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: an armature structure, including a first armature, a second armature, and several spring pieces, the two ends of the several spring pieces being respectively connected to the first armature and the second armature, so that the first armature and the second armature can move elastically along their own axial direction.

[0008] Furthermore, the first armature has multiple first threaded holes, and the first through holes are evenly distributed along its circumference; the second armature has multiple second threaded holes, and the second threaded holes are evenly distributed along its circumference; the two ends of the spring are respectively provided with mounting holes, the screw in the first threaded hole is fixedly connected to one end of the spring, and the other end of the spring is fixedly connected to the screw located in the second threaded hole.

[0009] Furthermore, the first armature is also provided with a first through hole, the first through hole and the first threaded hole are alternately arranged and evenly distributed along their own circumference, wherein the end of the screw located in the second threaded hole is placed in the first through hole.

[0010] Furthermore, the second armature is also provided with a second through hole, the second through hole and the second threaded hole are alternately arranged and evenly distributed along their own circumference, wherein the end of the screw located in the first threaded hole is placed in the second through hole.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. By using multiple independent spring pieces to connect the first and second armatures separately, a distributed elastic support structure is formed. When the working clearance increases due to friction plate wear, this structure can automatically compensate for the clearance change through the elastic deformation of the spring pieces over a wider range, ensuring that the armature can always be effectively engaged, significantly improving long-term working reliability and tolerance to wear.

[0013] 2. The multi-spring design distributes stress across the connection points and the main body of each spring, effectively preventing stress concentration. This significantly reduces the risk of material fatigue and substantially improves the service life of the elastic connection components and the overall durability of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the armature structure.

[0015] Figure 2 This is a schematic diagram of the exploded structure of the armature.

[0016] Figure 3 This is a cross-sectional schematic diagram of the armature structure.

[0017] The reference numerals in the attached diagram are as follows: 1. First armature; 11. First through hole; 12. First threaded hole; 2. Second armature; 21. Second through hole; 22. Second threaded hole; 3. Spring; 4. Screw. Detailed Implementation

[0018] Please see Figure 1-3 As shown, an armature structure in this embodiment includes a first armature 1, a second armature 2, and several spring clips 3. The two ends of the spring clips 3 are respectively connected to the first armature 1 and the second armature 2, allowing the first armature 1 and the second armature 2 to move elastically along their own axial direction. The first armature 1 is fixed to the rotor portion of the brake (rotating with the motor shaft). The second armature 2 faces the stator portion of the brake (moving with the first armature 1).

[0019] When braking is required, the electromagnet on the stator side (comprising a permanent magnet and a energized coil) generates a strong attractive force, which acts directly on the second armature 2. Under this attractive force, the second armature 2 overcomes the initial elastic force of the spring 3 and moves towards the stator, eventually pressing tightly against the stator (or the friction plate on the stator) to achieve braking and locking. During this engagement process, the spring 3 connecting the first armature 1 and the second armature 2 is stretched, storing elastic potential energy like a spring.

[0020] In the braking state (after engagement), the magnetic field attraction on the stator side (provided by the permanent magnet) or the mechanical friction is sufficient to maintain the pressed state. At this time, the spring 3 remains in a stretched state, and the potential energy stored inside it attempts to pull the second armature 2 back, but this pulling force is less than the force that maintains engagement, so the braking state is stably maintained.

[0021] When the brake needs to be released, the attraction of the stator to the second armature 2 is eliminated or significantly reduced by controlling the electromagnetic coil (e.g., by applying a reverse current to counteract the magnetic field). Once the attraction is reduced to less than the restoring force of the stretched spring 3, the elastic potential energy stored in the spring 3 is immediately released, generating a strong contractile force. This force pulls the second armature 2, causing it to quickly and reliably disengage from the stator and return to its initial position. The brake is released, and the rotor resumes free rotation. The power for the release action comes entirely from the release of the energy stored in the spring 3, without relying on an additional power source or mechanical device.

[0022] The effect is that the elasticity of the spring 3 allows the second armature 2 to have a large axial movement range relative to the first armature 1. This enables the brake to automatically adapt to the increased clearance caused by friction plate wear and the tolerance changes during manufacturing and assembly, ensuring effective engagement and release even after long-term use, thus improving system stability and durability. Moreover, by changing the number, shape, size, material, and other parameters of the spring 3, the required release force, reset speed, maximum working stroke, and fatigue life can be precisely designed, providing a high degree of design freedom for optimizing the overall performance of the brake.

[0023] Furthermore, the first armature 1 is also provided with a first through hole 11, the first through hole 11 and the first threaded hole 12 are alternately arranged and evenly distributed along their own circumference, wherein the end of the screw 4 located in the second threaded hole 22 is placed in the first through hole 11.

[0024] Furthermore, the second armature 2 is also provided with a second through hole 21. The second through hole 21 and the second threaded hole 22 are alternately arranged and evenly distributed along their own circumference, wherein the end of the screw 4 located in the first threaded hole 12 is placed in the second through hole 21.

[0025] The two ends of the spring piece 3 are fixed to the first armature 1 and the second armature 2 respectively by screws 4. The first armature 1 has multiple first threaded holes 12 (for screwing in the screw 4 that fixes one end of the spring piece 3), and the second armature 2 has multiple second threaded holes 22 (for screwing in the screw 4 that fixes the other end of the spring piece 3). These threaded holes are evenly distributed along their respective annulus (circumferential direction).

[0026] In addition to the first threaded hole 12, the first armature 1 also has multiple first through holes 11. These first through holes 11 are staggered with the first threaded holes 12 and are evenly distributed on the ring. Similarly, the second armature 2 not only has the second threaded hole 22, but also has multiple second through holes 21. These second through holes 21 are staggered with the second threaded holes 22 and are evenly distributed.

[0027] When the first armature 1 and the second armature 2 need to be brought close to the reset position (e.g., the initial position after the brake is released): the head of the screw 4 fixed on the second armature 2 (screwed into the second threaded hole 22) will extend into the corresponding first through hole 11 on the first armature 1. At the same time, the head of the screw 4 fixed on the first armature 1 (screwed into the first threaded hole 12) will extend into the corresponding second through hole 21 on the second armature 2.

[0028] Therefore, the heads of screws 4, which were originally protruding from the surface of the armature, are now "hidden" inside the holes of the other armature (like a drawer handle retracting into a recess). In this way, the two armatures can fit together tightly without any obstruction, and the heads of screws 4 will not press against each other. When the armatures need to separate (for example, when the second armature 2 is attracted to the stator during braking): the heads of screws 4 will safely exit from these holes, without collision or friction during the separation process.

[0029] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An armature structure, characterized in that: It includes a first armature, a second armature, and several spring pieces. The two ends of the spring pieces are respectively connected to the first armature and the second armature, so that the first armature and the second armature can move elastically along their own axial direction.

2. The armature structure according to claim 1, characterized in that: The first armature has multiple first threaded holes, which are evenly distributed along its circumference; the second armature has multiple second threaded holes, which are evenly distributed along its circumference; the two ends of the spring are respectively provided with mounting holes, and the screw in the first threaded hole is fixedly connected to one end of the spring, and the other end of the spring is fixedly connected to the screw located in the second threaded hole.

3. The armature structure according to claim 2, characterized in that: The first armature is also provided with a first through hole, and the first through hole and the first threaded hole are alternately arranged and evenly distributed along their own circumference, wherein the end of the screw located in the second threaded hole is placed in the first through hole.

4. The armature structure according to claim 3, characterized in that: The second armature is also provided with a second through hole, the second through hole and the second threaded hole are alternately arranged and evenly distributed along their own circumference, wherein the end of the screw located in the first threaded hole is placed in the second through hole.

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