A bistable brake

Abstract

The utility model discloses a kind of bistable brake, it is related to brake technical field, the brake includes sleeve, the one end of sleeve is provided with shell, its other end is provided with friction ring;The side of shell close to sleeve is equipped with avoiding hole;Armature ring and brake ring are provided in sleeve, brake ring is between armature ring and friction ring;Shell is further provided with electromagnetic drive mechanism electromagnetically connected with armature ring, electromagnetic drive mechanism can drive armature ring to approach or be far from brake ring, when the two sides of brake ring are simultaneously contacted with armature ring and friction ring, brake ring cannot autorotate around its own central axis under the action of friction force.Sleeve is wrapped in armature ring and brake ring, armature ring and brake ring between, brake ring and friction ring between during brake work will not enter solid particulate, and then when brake is braked, external solid particulate will not affect the normal contact between armature ring, brake ring and friction ring, and then will not affect brake effect.

Description

Technical Field

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

[0002] A bistable brake, also known as a trigger brake, is a type of brake that can maintain a braking or released state for an extended period with almost zero energy consumption. Bistable brakes are particularly suitable when equipment needs to be held in one position for a long time, such as in gantry cranes and hatch systems.

[0003] Chinese Patent Publication No. CN111954769B discloses an electromagnetic brake in which a short-time current pulse causes the brake to move between an engaged and disengaged state. However, this brake has the following problem in use: the gap between the pressure plate 14 and the armature plate 16 is exposed. When the friction plate 12 moves between them, external particles can easily enter between the pressure plate 14 and the friction plate 12, or between the armature plate 16 and the friction plate, through this gap. If particles exist between the pressure plate 14 and the friction plate 12, or between the armature plate 16 and the friction plate, during braking, these particles will affect the normal contact between the armature plate 16, the friction plate 12, and the pressure plate 14, thereby affecting the frictional force among them and consequently affecting the braking effect. Utility Model Content

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

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

[0006] A bistable brake includes a sleeve, one end of which is provided with a housing, and the other end with a friction ring. A clearance hole is provided on the side of the housing near the sleeve. An armature ring and a brake ring are disposed within the sleeve, with the brake ring located between the armature ring and the friction ring. The central axes of the sleeve, the friction ring, and the armature ring are all collinear with the central axis of the clearance hole, and the central axis of the brake ring is parallel to the central axis of the clearance hole. An electromagnetic drive mechanism, electromagnetically connected to the armature ring, is also disposed within the housing. The electromagnetic drive mechanism can drive the armature ring to move closer to or away from the brake ring. When both sides of the brake ring are simultaneously in contact with the armature ring and the friction ring, the brake ring cannot rotate around its own central axis under the action of friction.

[0007] Furthermore, in this utility model, the electromagnetic drive mechanism includes a conductor and a spring, both disposed within the housing, wherein the conductor is electromagnetically connected to the armature ring; the spring can drive the armature ring, causing the armature ring to press the brake ring against the friction ring.

[0008] Furthermore, in this utility model, a plurality of countersunk holes are provided on one side of the housing where the clearance hole is provided, and the plurality of countersunk holes are arranged in a circular array about the central axis of the clearance hole; a spring is provided in any of the countersunk holes, and the central axis of any of the countersunk holes and the extension and contraction direction of any of the springs are parallel to the central axis of the clearance hole; one end of any of the springs is connected to the bottom wall of the countersunk hole, and the other end is connected to the armature ring.

[0009] Furthermore, in this utility model, a limiting mechanism is also provided inside the sleeve, and the armature ring is slidably connected to the limiting mechanism. The limiting mechanism enables the armature ring to move only along the central axis of the clearance hole, and not to rotate around its own central axis.

[0010] Furthermore, in this utility model, the limiting mechanism includes at least one limiting strip spaced at intervals on the inner sidewall of the sleeve, the length direction of the limiting strip being parallel to the central axis of the sleeve; a limiting groove extending parallel to its own central axis is provided on the outer peripheral side of the armature ring, the limiting groove being slidably connected to the limiting strip.

[0011] Furthermore, in this invention, the sum of the thicknesses of the armature ring and the brake ring is less than the length of the sleeve.

[0012] Furthermore, in this utility model, the aforementioned housing is provided with several fixing rings.

[0013] The beneficial effects of this utility model are:

[0014] This invention provides a bistable brake in which a sleeve encloses the armature ring and the brake ring. During brake operation, solid particles will not enter between the armature ring and the brake ring, or between the brake ring and the friction ring. Therefore, when the brake is applied, external solid particles will not affect the normal contact between the armature ring, the brake ring, and the friction ring, and thus will not affect the braking effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0016] Figure 2 for Figure 1 Exploded view;

[0017] Figure 3 for Figure 1 The right view;

[0018] Figure 4 for Figure 3 A sectional view of section AA in the middle.

[0019] In the figure: 1-sleeve; 2-housing; 3-friction ring; 4-clearance hole; 5-armature ring; 6-brake ring; 7-conductor; 8-spring; 9-limiting strip; 10-limiting groove; 11-fixing ring. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-4 This utility model provides a technical solution:

[0022] A bistable brake includes a sleeve 1, from Figure 4 From the perspective of the device, there is a housing 2 at the left end of the sleeve 1, and a friction ring 3 is installed at the right end of the sleeve 1. Several screws are installed on the friction ring 3 at intervals. The screws pass through the sleeve 1 and are threadedly connected to the housing 2. In this way, both the friction ring 3 and the sleeve 1 are fixed to one side of the housing 2. An clearance hole 4 is provided on the side of the housing 2 near the sleeve 1, which is used to accommodate the end of the rotating shaft that needs to be braked when the brake is in use.

[0023] An armature ring 5 and a brake ring 6 are installed inside the sleeve 1. After installation, the brake ring 6 is located between the armature ring 5 and the friction ring 3. The central axes of the sleeve 1, friction ring 3, and armature ring 5 are all collinear with the central axis of the clearance hole 4, and the central axis of the brake ring 6 is parallel to the central axis of the clearance hole 4. An electromagnetic drive mechanism that is electromagnetically connected to the armature ring 5 is also installed inside the housing 2. The electromagnetic drive mechanism can drive the armature ring 5 to move closer to or away from the brake ring 6. When both sides of the brake ring 6 are in contact with the armature ring 5 and the friction ring 3 at the same time, the brake ring 6 cannot rotate around its own central axis under the action of friction.

[0024] Specifically, in this embodiment, the electromagnetic drive mechanism includes a conductor 7 and a spring 8, both installed inside the housing 2. The conductor 7 is electromagnetically connected to the armature ring 5. The spring 8 can drive the armature ring 5, causing the armature ring 5 to press the brake ring 6 against the friction ring 3.

[0025] Preferably, in this embodiment, the housing 2 has several countersunk holes on one side where the clearance hole 4 is located. These countersunk holes are arranged in a circular array about the central axis of the clearance hole 4. A spring 8 is installed in each countersunk hole, and the central axis of each countersunk hole and the extension / retraction direction of each spring 8 are parallel to the central axis of the clearance hole 4. One end of each spring 8 is connected to the bottom wall of the countersunk hole, and the other end is connected to the armature ring 5. As for how the electromagnetic drive mechanism drives the armature ring 5, please refer to Chinese Patent No. CN111954769B, which discloses an electromagnetic brake, and its specification details the working principle of the electromagnetic drive mechanism.

[0026] In order to allow the armature ring 5 and the brake ring 6 to move within the sleeve 1, in this embodiment the sum of the thicknesses of the armature ring 5 and the brake ring 6 is less than the length of the sleeve 1.

[0027] from Figure 4 From the perspective of the braking process, the armature ring 5 moves to the right until its right side abuts against the left side of the brake ring 6, and the right side of the brake ring 6 abuts against the left side of the friction ring 3. At this time, the brake ring 6, which rotates synchronously with the rotating shaft (not shown in the figure) to be braked, gradually stops rotating under the action of friction. As the rotation speed of the brake ring 6 decreases from fast to slow, the armature ring 5 will also tend to rotate under the action of friction between the armature ring 5 and the brake ring 6, or it may rotate at a certain angle. The rotation of the armature ring 5 will cause the spring 8 to undergo torsional deformation. If this continues for a long time, it will affect the normal use of the spring 8. Therefore, in order to solve this problem, a limiting mechanism is also installed on the inner wall of the sleeve 1 in this embodiment. The armature ring 5 is slidably connected to the limiting mechanism. The limiting mechanism makes the armature ring 5 move only along the central axis of the clearance hole 4, and cannot rotate around its own central axis.

[0028] Preferably, in this embodiment, the limiting mechanism includes a plurality of limiting strips 9 spaced apart on the inner side wall of the sleeve 1, the length direction of any limiting strip 9 being parallel to the central axis of the sleeve 1; a plurality of limiting grooves 10 extending in a direction parallel to their own central axis are provided on the outer peripheral side of the armature ring 5, and the plurality of limiting grooves 10 are slidably connected to the plurality of limiting strips 9 in a one-to-one correspondence.

[0029] To facilitate the installation of this brake onto the corresponding mechanism, several retaining rings 11 are installed on the housing 2 in this embodiment. During fixing, bolts can pass through the retaining rings 11 and be bolted to the corresponding mechanism.

[0030] Working principle:

[0031] After this brake is installed on the corresponding device, one end of the corresponding rotating shaft can be connected to the brake ring 6 by a spline connection or key connection, and one end of the rotating shaft can extend into the clearance hole 4. The rotating shaft does not require braking during normal operation. Figure 4From this perspective, in this state, the electromagnetic drive mechanism moves the armature ring 5 to the left and keeps it out of contact with the brake ring 6, allowing the brake ring 6 to rotate synchronously with the rotating shaft. When braking is required, the electromagnetic drive mechanism and the spring 8 work together to move the armature ring 5 to the right until the right side of the armature ring 5 abuts against the left side of the brake ring 6, and the right side of the brake ring 6 abuts against the left side of the friction ring 3. At this point, the brake ring 6, which rotates synchronously with the rotating shaft that needs to be braked, gradually stops rotating under the action of friction until the brake ring 6 stops rotating, thus stopping the rotating shaft and achieving braking.

[0032] 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 bistable brake, characterized in that: The device includes a sleeve, one end of which is provided with a housing, and the other end with a friction ring. A clearance hole is provided on the side of the housing near the sleeve. An armature ring and a brake ring are disposed inside the sleeve, with the brake ring located between the armature ring and the friction ring. The central axes of the sleeve, the friction ring, and the armature ring are all collinear with the central axis of the clearance hole, and the central axis of the brake ring is parallel to the central axis of the clearance hole. An electromagnetic drive mechanism, electromagnetically connected to the armature ring, is also disposed inside the housing. This electromagnetic drive mechanism can drive the armature ring closer to or further away from the brake ring. When both sides of the brake ring are in contact with both the armature ring and the friction ring simultaneously, the brake ring cannot rotate around its own central axis under the action of friction.

2. A bistable brake according to claim 1, characterized in that: The electromagnetic drive mechanism includes a conductor and a spring, both disposed within the housing. The conductor is electromagnetically connected to the armature ring. The spring drives the armature ring, causing the armature ring to press the brake ring against the friction ring.

3. A bistable brake according to claim 2, characterized in that: The housing has a plurality of countersunk holes on one side where the clearance hole is provided, and the plurality of countersunk holes are arranged in a circular array about the central axis of the clearance hole; a spring is provided in any of the countersunk holes, and the central axis of any of the countersunk holes and the extension and contraction direction of any of the springs are parallel to the central axis of the clearance hole. One end of any of the springs is connected to the bottom wall of the countersunk hole, and the other end is connected to the armature ring.

4. A bistable brake according to claim 3, characterized in that: The sum of the thicknesses of the armature ring and the brake ring is less than the length of the sleeve.

5. A bistable brake according to claim 3, characterized in that: The sleeve is also provided with a limiting mechanism. The armature ring is slidably connected to the limiting mechanism. The limiting mechanism allows the armature ring to move only along the central axis of the clearance hole, and prevents it from rotating around its own central axis.

6. A bistable brake according to claim 5, characterized in that: The limiting mechanism includes at least one limiting strip spaced apart on the inner sidewall of the sleeve, the length direction of the limiting strip being parallel to the central axis of the sleeve; a limiting groove extending parallel to its own central axis is provided on the outer peripheral side of the armature ring, the limiting groove being slidably connected to the limiting strip.

7. A bistable brake according to claim 6, characterized in that: The housing is provided with several fixing rings.

Images