A dual coil brake

Abstract

The utility model discloses a double coil brake relates to brake technical field, and this double coil brake includes the magnetic yoke ring, and the two outer lateral walls of magnetic yoke ring opposite all are established annular groove, the both sides of magnetic yoke ring all are provided with brake unit, and any brake unit includes the electromagnetic coil of setting in corresponding annular groove and sets up the brake mechanism of corresponding lateral wall on magnetic yoke ring, and brake mechanism is connected with electromagnetic coil magnetically, when braking, two groups brake unit work simultaneously, or the brake unit that does not fail work. By installing a group brake unit on the two outer lateral walls of magnetic yoke ring opposite, when the brake unit among them has a problem, another group brake unit still can guarantee the normal brake function of brake, greatly improves the security of brake, and one brake can replace the double brake in the current scheme, saves the cost.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, and more specifically, to a dual-coil brake. Background Technology

[0002] A conventional electromagnetic power-off brake consists of several main components, including a coil, yoke, armature, brake disc, and compression spring. It can be used in general safety and emergency situations, providing immediate stopping and positioning when equipment is in operation during a power outage or accident. In more demanding safety environments, such as theater lighting systems, construction hoisting, and metallurgical applications, two individual brakes are typically used in series for enhanced safety. If one brake malfunctions (e.g., coil short circuit, worn friction pads, or increased air gap), the other brake can still function. However, this design requires purchasing two separate brakes, undoubtedly increasing operating costs. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dual-coil brake.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A dual-coil brake includes a magnetic yoke ring, on which annular grooves are formed on two opposite outer sidewalls; braking units are provided on both sides of the magnetic yoke ring, each braking unit including an electromagnetic coil disposed in the corresponding annular groove and a braking mechanism disposed on the corresponding sidewall of the magnetic yoke ring, the braking mechanism being magnetically connected to the electromagnetic coil; during braking, both sets of braking units operate simultaneously, or the non-failed braking unit operates.

[0006] Furthermore, in this invention, countersunk holes are provided on both opposite sidewalls of the magnetic yoke ring. The braking mechanism includes a spring disposed within the countersunk hole, and an armature ring, a brake ring, and a limiting ring stacked sequentially. The limiting ring is detachably connected to the magnetic yoke ring. The armature ring is located between the brake ring and the magnetic yoke ring. The sum of the thicknesses of the armature ring and the brake ring is less than the distance between the limiting ring and the magnetic yoke ring. One end of the spring is connected to the inner bottom wall of the countersunk hole, and the other end is connected to the armature ring. The extension and retraction direction of the spring is parallel to the central axis of the magnetic yoke ring. In the non-braking state, the spring causes the armature ring to move away from the brake ring.

[0007] Furthermore, in this invention, the central axis of the armature ring and the central axis of the limiting ring are both collinear with the central axis of the magnetic yoke ring; the central axis of the brake ring is parallel to the central axis of the magnetic yoke ring.

[0008] Furthermore, in this utility model, the magnetic yoke ring is detachably connected to two dust covers, and the two limiting rings are respectively located inside the two dust covers.

[0009] Furthermore, in this invention, a heat dissipation mechanism is provided on the inner wall of the aforementioned magnetic yoke ring.

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

[0011] This invention provides a dual-coil brake, which has a set of braking units installed on the two opposite outer walls of the magnetic yoke ring. When one braking unit malfunctions, the other braking unit can still ensure the normal braking function of the brake, greatly improving the safety of the brake. A single brake can replace the dual brakes in the current solution, saving costs. 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 The main view;

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

[0015] In the diagram: 101-Magnetic yoke ring; 201-Electromagnetic coil; 202-Spring; 203-Armature ring; 204-Brake ring; 205-Limit ring; 301-Dust cover; 401-Heat dissipation mechanism; 501-Rotating shaft. 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 dual-coil brake includes a magnetic yoke ring 101. Annular grooves are formed on the two opposite outer walls of the magnetic yoke ring 101. In this embodiment, the central axis of any annular groove is collinear with the central axis of the magnetic yoke ring 101. Braking units are installed on both sides of the magnetic yoke ring 101. Each braking unit includes an electromagnetic coil 201 installed in the corresponding annular groove and a braking mechanism installed on the corresponding side wall of the magnetic yoke ring 101. The braking mechanism is magnetically connected to the electromagnetic coil 201. During braking, both braking units operate simultaneously, or the non-failed braking unit operates.

[0019] Specifically, refer to Figure 3 In this embodiment, countersunk holes (not shown in the figure) are provided on both opposite sidewalls of the magnetic yoke ring 101. The arbitrary braking mechanism includes a spring 202 installed in the countersunk hole, and an armature ring 203, a brake ring 204, and a limiting ring 205 stacked in sequence. The limiting ring 205 is detachably connected to the magnetic yoke ring 101 by screws. The armature ring 203 is located between the brake ring 204 and the magnetic yoke ring 101. The sum of the thicknesses of the armature ring 203 and the brake ring 204 is less than the distance between the limiting ring 205 and the magnetic yoke ring 101 (from...). Figure 3 From the perspective of the limiting ring 205 and the magnetic yoke ring 101, the distance between them is the horizontal distance between the right side wall of the limiting ring 205 and the left side wall of the magnetic yoke ring 101. One end of the spring 202 is connected to the inner bottom wall of the countersunk hole, and the other end is connected to the armature ring 203. The extension and retraction direction of the spring 202 is parallel to the central axis of the magnetic yoke ring 101. In the non-braking state, the spring 202 moves the armature ring 203 away from the brake ring 204.

[0020] Preferred, from Figure 3 From a certain perspective, the left / right side wall of the magnetic yoke ring 101 has a suitable number of countersunk holes. The number of countersunk holes can be two, three, four, or more. Regardless of the number of countersunk holes, the countersunk holes on the left / right side wall of the magnetic yoke ring 101 must be arranged in a circular array about the central axis of the magnetic yoke ring 101, and the central axis of any countersunk hole is parallel to the central axis of the magnetic yoke ring 101. A spring 202 is installed in each countersunk hole, and the end of each spring 202 away from the bottom wall of the countersunk hole is connected to the armature ring 203. In this way, when there is no braking, the tension of the spring 202 on the armature ring 203 is uniform, so that the armature ring 203 can move smoothly to the right / left.

[0021] Specifically, in this embodiment, the installation positions of the armature ring 203 and the limiting ring 205 are preferably such that the central axis of the armature ring 203 and the central axis of the limiting ring 205 are both collinear with the central axis of the magnetic yoke ring 101; and the central axis of the brake ring 204 is parallel to the central axis of the magnetic yoke ring 101.

[0022] Preferred, such as Figure 3As shown, due to the gap between the limiting ring 205 and the magnetic yoke ring 101, external dust or solid particles can easily enter between the armature ring 203 and the brake ring 204, or between the limiting ring 205 and the brake ring 204, through this gap. During braking, if solid particles exist between the armature ring 203 and the brake ring 204, or between the limiting ring 205 and the brake ring 204, it will affect the normal contact between the three, thereby affecting the friction between them and thus affecting the braking effect. Therefore, to solve the above problem, in this embodiment, the magnetic yoke ring 101 is detachably connected to two dust covers 301. After the two dust covers 301 are installed, they respectively wrap the limiting ring 205, the brake ring 204, and the armature ring 203, so that dust is less likely to enter between the armature ring 203 and the brake ring 204, or between the limiting ring 205 and the brake ring 204. The dust cover 301 can be threaded to the magnetic yoke ring 101, and the dust cover 301 and the limiting ring 205 can be clearance fit. In the design, the outer diameter of the armature ring 203 and the outer diameter of the brake ring 204 can be smaller than the inner diameter of the dust cover 301, so that the dust cover 301 will not interfere with the normal movement of the armature ring 203 and the brake ring 204.

[0023] Since the brake generates heat during braking (mainly the heat generated by the friction between the armature ring 203, the brake ring 204, and the limiting ring 205), in order to dissipate the above heat, in some embodiments of this example, a heat dissipation mechanism 401 is also installed on the inner wall of the magnetic yoke ring 101. The heat dissipation mechanism 401 may be composed of several heat dissipation fins.

[0024] Working principle:

[0025] The connection method between the rotating shaft 501 and this brake is as follows: Figure 3 As shown. This brake has a set of braking units installed on the two opposite outer walls of the magnetic yoke ring 101. In normal operation, by energizing the two electromagnetic coils 201, the two electromagnetic coils 201 generate magnetic force, attracting the two armature rings 203. The two armature rings 203 overcome the elastic force of the spring 202 and move closer to each other (from...). Figure 3 From the perspective of the left armature ring 203 moving to the right and the right armature ring 203 moving to the left, neither armature ring 203 applies pressure to the two brake rings 204, and the brake is in the released state. When the electromagnetic coil 201 is de-energized, the springs 202 on both sides will press the two armature rings 203 onto the two brake rings 204 respectively, until the two brake rings 204 abut against the two limit rings 205 respectively. At this time, the two brake rings 204 stop rotating under the action of friction, and the brake is in the braking state. If one of the electromagnetic coils 201 in this brake fails, simply switching to another set of electromagnetic coils 201 will still ensure the normal braking function of this brake.

[0026] 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 dual-coil brake, characterized in that: The device includes a magnetic yoke ring, on which annular grooves are formed on two opposite sidewalls. Braking units are provided on both sides of the magnetic yoke ring. Each braking unit includes an electromagnetic coil disposed in the corresponding annular groove and a braking mechanism disposed on the corresponding sidewall of the magnetic yoke ring. The braking mechanism is magnetically connected to the electromagnetic coil. During braking, both sets of braking units work simultaneously, or the non-failed braking unit works.

2. A dual-coil brake according to claim 1, characterized in that: The magnetic yoke ring has countersunk holes on its two opposite sidewalls. Each braking mechanism includes a spring disposed within the countersunk hole, and an armature ring, a brake ring, and a limiting ring stacked sequentially. The limiting ring is detachably connected to the magnetic yoke ring. The armature ring is located between the brake ring and the magnetic yoke ring. The sum of the thicknesses of the armature ring and the brake ring is less than the distance between the limiting ring and the magnetic yoke ring. One end of the spring is connected to the inner bottom wall of the countersunk hole, and the other end is connected to the armature ring. The extension and retraction direction of the spring is parallel to the central axis of the magnetic yoke ring. In the non-braking state, the spring moves the armature ring away from the brake ring.

3. A dual-coil brake according to claim 2, characterized in that: The central axis of the armature ring and the central axis of the limiting ring are both collinear with the central axis of the magnetic yoke ring; the central axis of the braking ring is parallel to the central axis of the magnetic yoke ring.

4. A dual-coil brake according to claim 2 or 3, characterized in that: The magnetic yoke ring is detachably connected to two dust covers, and the two limiting rings are respectively located inside the two dust covers.

5. A dual-coil brake according to claim 4, characterized in that: A heat dissipation mechanism is provided on the inner wall of the magnetic yoke ring.

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