A brake for a wheel hub motor

Abstract

The utility model discloses a kind of brakes for in-wheel motor, it is related to brake technology field, the brake includes mounting ring, brake ring, armature ring and limit ring, limit ring is detachably connected with mounting ring, armature ring is connected with limit ring by spring;Spring makes armature ring away from brake ring under no external force intervention;Mounting ring has first friction surface;Electromagnetic coil is set in mounting ring and close to first friction surface;Brake ring and first friction surface abut when braking;Annular groove is opened on first friction surface, friction ring is set in annular groove, the side of friction ring close to brake ring is second friction surface;Adjusting mechanism is also set in mounting ring, it is used to adjust the distance between second friction surface and first friction surface.If the wear of second friction surface is larger, then the second friction surface on friction ring and first friction surface can be coplanar again by the mode of operating adjusting mechanism, the braking effect of brake when braking can be guaranteed under the premise of not replacing friction ring.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, and more specifically, to a brake for a hub motor. Background Technology

[0002] An electromagnetic brake is a connector that transmits torque from the active side to the passive side. It can be freely engaged, disengaged, or braked as needed. It has advantages such as compact structure, simple operation, sensitive response, long service life, reliable use, and easy remote control.

[0003] Chinese patent CN219549432U discloses a brake that is easy to maintain. When braking, the electromagnetic coil moves the armature 2 to the right, pressing the brake disc 3 against the fixed disc 4. Under the action of friction, the brake disc 3 gradually stops rotating, ultimately braking the rotating shaft connected to the brake disc 3. However, because both friction surfaces of the brake disc 3 (i.e., the contact surface between the brake disc 3 and the armature 2, and the contact surface between the brake disc 3 and the fixed disc 4) are subjected to significant friction during braking, prolonged use leads to significant wear on both friction surfaces, affecting the braking effect. To solve this problem, the entire brake disc 3 is often replaced, but this increases procurement costs. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a brake for a hub motor.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A hub motor brake includes a mounting ring, a brake ring, an armature ring, and a limiting ring stacked sequentially. The limiting ring is detachably connected to the mounting ring, and the armature ring is connected to the limiting ring by a spring. The distance between the limiting ring and the mounting ring is greater than the sum of the thicknesses of the brake ring and the armature ring. Without external force interference, the spring keeps the armature ring away from the brake ring. The mounting ring has a non-friction surface and a first friction surface arranged opposite each other. An electromagnetic coil is disposed within the mounting ring near the first friction surface. During braking, the brake ring abuts against the first friction surface. An annular groove is formed on the first friction surface, and a friction ring is disposed within the annular groove. The side of the friction ring near the brake ring is a second friction surface, which is parallel to the first friction surface. An adjustment mechanism is also provided within the mounting ring for adjusting the distance between the second friction surface and the first friction surface.

[0007] Furthermore, in this utility model, the adjustment mechanism includes two bolts threadedly connected to the mounting ring, the central axes of the two bolts are parallel to each other, the two bolts are symmetrically distributed about the central axis of the mounting ring, and one end of each bolt is rotatably connected to the friction ring.

[0008] Furthermore, in this utility model, the central axis of the limiting ring, the central axis of the armature ring, and the central axis of the brake ring are all collinear with the central axis of the mounting ring.

[0009] Furthermore, in this utility model, a rubber sleeve is provided on the outer periphery of the mounting ring, and the limiting ring and the braking ring are both located inside the rubber sleeve.

[0010] The beneficial effects of this utility model are:

[0011] This utility model provides a brake for a hub motor. After the brake has been used for a long time, if the wear of the friction ring is large (i.e., the wear of the second friction surface is large), the second friction surface on the friction ring can be made to be coplanar with the first friction surface again by operating the adjustment mechanism. The braking effect of the brake can be guaranteed without frequently replacing the friction ring. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0013] Figure 2 for Figure 1 Top view;

[0014] Figure 3 for Figure 2 A sectional view of section AA in the middle.

[0015] In the diagram: 101-Mounting ring; 201-Brake ring; 301-Armature ring; 401-Limit ring; 501-Spring; 601-Electromagnetic coil; 701-Friction ring; 801-Adjusting mechanism; 901-Rubber sleeve. Detailed Implementation

[0016] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] Please see Figures 1-3 This utility model provides a technical solution:

[0018] A hub motor brake includes a mounting ring 101, a brake ring 201, an armature ring 301, and a limiting ring 401 stacked sequentially. After installation, the brake ring 201 is slidably connected to the rotating shaft to be braked, meaning the brake can only reciprocate along the central axis of the rotating shaft and cannot rotate around it. The limiting ring 401 is connected to the mounting ring 101 by screws, and the distance between the limiting ring 401 and the mounting ring 101 is greater than the sum of the thicknesses of the brake ring 201 and the armature ring 301. The armature ring 301 is connected to the limiting ring 401 by a spring 501. Without external interference, the spring 501 keeps the armature ring 301 away from the brake ring 201. The mounting ring 101 has a non-friction surface and a first friction surface (not shown in the figure) opposite to each other. An annular groove (not shown in the figure) is formed inside the mounting ring 101 near the first friction surface, and an electromagnetic coil 601 is installed in the annular groove. Figure 3 From the perspective of [unclear context], the electromagnetic coil 601 is entirely located within the annular groove, and the right end face of the electromagnetic coil 601 is not coplanar with the first friction surface. Several countersunk holes are formed on the end face of the limiting ring 401 near the armature ring 301. The central axis of any countersunk hole is parallel to the central axis of the mounting ring 101. The countersunk holes are arranged in a circular array about the central axis of the mounting ring 101. A spring 501 is installed in each countersunk hole. One end of the spring 501 is connected to the bottom wall of the countersunk hole, and the other end is connected to the armature ring 301. Without external force interference, the spring 501 must separate the armature ring 301 from the brake ring 201. During braking, the brake ring 201 abuts against the first friction surface.

[0019] After prolonged use, the wear on the first friction surface of this brake will increase, which will affect the braking effect. Therefore, to solve this problem, an annular groove (not shown in the figure) is provided on the first friction surface in this embodiment. A friction ring 701 is installed in the annular groove. The side of the friction ring 701 closest to the brake ring 201 is the second friction surface, which is parallel to the first friction surface. An adjustment mechanism 801 is also installed in the mounting ring 101, which is used to adjust the distance between the second friction surface and the first friction surface.

[0020] Preferred, refer to Figure 3 In this embodiment, two bolts are threadedly connected to the mounting ring 101. The central axes of the two bolts are parallel to each other and are symmetrically distributed about the central axis of the mounting ring 101. One end of each bolt is rotatably connected to the friction ring 701.

[0021] Preferably, in this embodiment, the installation method of the limiting ring 401, armature ring 301 and brake ring 201 is such that the central axis of the limiting ring 401, the central axis of the armature ring 301 and the central axis of the brake ring 201 are all collinear with the central axis of the mounting ring 101.

[0022] Preferred, such as Figure 3 As shown, due to the gaps between the mounting ring 101, brake ring 201, armature ring 301, and limiting ring 401, external dust or solid particles can easily enter between them. During braking, if solid particles exist between the mounting ring 101 and brake ring 201, between the brake ring 201 and armature ring 301, or between the armature ring 301 and limiting ring 401, it will affect the normal contact between the four components, thereby affecting the friction between them and consequently affecting the braking effect. Therefore, to solve the above problem, in this embodiment, a rubber sleeve 901 is specifically fitted on the outer periphery of the mounting ring 101. After the rubber sleeve 901 is installed, the limiting ring 401, armature ring 301, and brake ring 201 are all located inside the rubber sleeve 901. In this way, the rubber sleeve 901 can cover the gaps between the four components, thereby preventing dust from entering between them.

[0023] Working principle:

[0024] Before installation, adjust the adjustment mechanism 801 to make the second friction surface coplanar with the first friction surface.

[0025] from Figure 3 From the perspective of this brake, when the brake is not applied, the electromagnetic coil 601 is de-energized, and the armature ring 301 moves to the right under the action of the spring 501 until the armature ring 301 separates from the brake ring 201. At this time, the brake ring 201 can rotate along with the corresponding rotating shaft.

[0026] During braking, the electromagnetic coil 601 is energized. Under the magnetic attraction generated by the energized electromagnetic coil 601, the armature ring 301 overcomes the elastic force of several springs 501 and moves to the left. The leftward movement of the armature ring 301 will cause the brake ring 201 to move to the left synchronously until the armature ring 301 presses the brake ring 201 against the first friction surface / second friction surface. The rotating shaft stops rotating under the action of the friction force received by the brake ring 201, thus achieving braking.

[0027] After prolonged use of the brake, if the wear of the friction ring 701 is significant (i.e., the wear of the second friction surface is significant), from Figure 3 From the perspective of the adjustment mechanism 801, the friction ring 701 can be moved to the right until the second friction surface and the first friction surface are coplanar again. The braking effect of the brake can be guaranteed without replacing the friction ring 701.

[0028] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A brake for a hub motor, comprising a mounting ring, a brake ring, an armature ring, and a limiting ring stacked sequentially, wherein the limiting ring is detachably connected to the mounting ring, the armature ring is connected to the limiting ring by a spring, and the distance between the limiting ring and the mounting ring is greater than the sum of the thicknesses of the brake ring and the armature ring; the spring, without external force interference, causes the armature ring to move away from the brake ring; characterized in that: The mounting ring has a non-friction surface and a first friction surface arranged opposite to each other; an electromagnetic coil is arranged inside the mounting ring near the first friction surface; during braking, the braking ring abuts against the first friction surface; an annular groove is formed on the first friction surface, and a friction ring is arranged in the annular groove; the side of the friction ring near the braking ring is a second friction surface, and the second friction surface is parallel to the first friction surface; an adjustment mechanism is also provided inside the mounting ring, which is used to adjust the distance between the second friction surface and the first friction surface.

2. The brake for a hub motor according to claim 1, characterized in that: The adjustment mechanism includes two bolts threadedly connected to the mounting ring. The central axes of the two bolts are parallel to each other and are symmetrically distributed about the central axis of the mounting ring. One end of each bolt is rotatably connected to the friction ring.

3. A hub motor brake according to claim 1 or 2, characterized in that: The central axis of the limiting ring, the central axis of the armature ring, and the central axis of the brake ring are all collinear with the central axis of the mounting ring.

4. A hub motor brake according to claim 3, characterized in that: A rubber sleeve is fitted on the outer periphery of the mounting ring, and both the limiting ring and the braking ring are located inside the rubber sleeve.

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