An adjustable gap electromagnetic brake

Abstract

The utility model discloses an adjustable clearance's electromagnetic brake relates to electromagnetic brake technical field, this adjustable clearance's electromagnetic brake includes flange plate, rotor, moving plate and stator who sets up in proper order, and the interval between rotor and stator is greater than the thickness of moving plate, and moving plate is connected with stator through first spring, and the electromagnetic coil is seted up in stator, the flange plate is detachably connected with stator through a plurality of connecting pieces, and the adjusting assembly is seted up on any connecting piece, and it is used for adjusting the interval between flange plate and stator. When the wear and tear of the two friction surfaces of rotor is larger when the brake is used for a long time, the thickness of the brake part of rotor can be thinned, in order to not influence the brake effect of brake, the adjusting assembly can be adjusted, so that the interval between flange plate and stator is kept in a reasonable range, and the moving plate of rotor does not need to be replaced frequently while guaranteeing the brake effect of brake, and the use cost is low.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic brake technology, and more specifically, to an adjustable gap electromagnetic brake. 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 boasts advantages such as compact structure, simple operation, sensitive response, long lifespan, reliable use, and ease of remote control. Electromagnetic brakes are an ideal automated actuator in modern industry, primarily serving to transmit power and control motion in mechanical transmission systems.

[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, the following situation occurs after prolonged use: the wear on the two friction surfaces of the brake disc 3 is significant, and the thickness of the braking part of the brake disc 3 gradually thins with prolonged use. This situation affects the braking effect of the brake. In the prior art, to solve this problem, the entire brake disc 3 is often replaced, but this method increases procurement costs. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an adjustable gap electromagnetic brake.

[0005] The objective of this utility model is achieved through the following technical solution: An adjustable gap electromagnetic brake includes a flange, a rotor, a moving plate, and a stator stacked sequentially. The distance between the rotor and the stator is greater than the thickness of the moving plate. The moving plate is connected to the stator by a first spring. An electromagnetic coil is disposed inside the stator. The flange is detachably connected to the stator by a plurality of connecting members. An adjusting component is disposed on any of the connecting members for adjusting the distance between the flange and the stator.

[0006] Furthermore, in this utility model, the central axis of the flange, the central axis of the rotor, and the central axis of the moving plate are all collinear with the central axis of the stator; and the diameter of the rotor and the diameter of the moving plate are both smaller than the diameter of the flange and the diameter of the stator.

[0007] Furthermore, in this utility model, the stator is provided with a plurality of through holes corresponding one-to-one with the plurality of the connecting members, the plurality of the through holes are arranged in a circular array about the central axis of the stator, and the central axis of any of the through holes is parallel to the central axis of the stator; the plurality of the connecting members are detachably connected to the plurality of the through holes respectively.

[0008] Furthermore, in this utility model, any of the above-mentioned connecting members includes a first rivet passing through the flange, a second spring located in the corresponding through hole, and a second rivet located at the end of the corresponding through hole away from the flange. The corresponding ends of the second rivet and the corresponding ends of the first rivet extend into the through hole and are respectively connected to the two ends of the spring. The adjustment component is disposed on the first rivet.

[0009] Furthermore, in this utility model, the adjustment component includes a plurality of stacked positioning pieces, any one of which is engaged with the first rivet; the distance between the flange and the stator is equal to the sum of the thicknesses of the plurality of positioning pieces.

[0010] Furthermore, in this utility model, both the end of the second rivet located in the through hole and the end of the first rivet located in the through hole are provided with pull rings, and the two ends of the spring are respectively connected to the two pull rings.

[0011] The beneficial effects of this utility model are: This invention provides an adjustable gap electromagnetic brake. By installing a set of adjustment components on each connector, when the wear of the two friction surfaces of the rotor is large due to long-term use of the brake, the thickness of the braking part of the rotor will become thinner. In order not to affect the braking effect of the brake, the adjustment components can be adjusted to keep the gap between the flange and the stator within a reasonable range. While ensuring the braking effect of the brake, it is not necessary to frequently replace the rotor moving plate, resulting in low operating costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 for Figure 1 A sectional view; Figure 3 for Figure 1 Enlarged view of part A in the middle; Figure 4 This is a schematic diagram of the connector structure according to an embodiment of the present utility model.

[0013] In the diagram: 101-flange; 201-rotor; 301-moving plate; 401-stator; 501-electromagnetic coil; 601-first rivet; 602-second spring; 603-second rivet; 701-positioning plate; 801-shaft sleeve. Detailed Implementation

[0014] 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.

[0015] Please see Figures 1-4 This utility model provides a technical solution: An adjustable-gap electromagnetic brake includes a flange 101, a rotor 201, a moving plate 301, and a stator 401 stacked sequentially. The distance between the rotor 201 and the stator 401 is greater than the thickness of the moving plate 301. The moving plate 301 and the stator 401 are connected by several first springs (not shown in the figure). An electromagnetic coil 501 is disposed inside the stator 401. The flange 101 is detachably connected to the stator 401 by several connecting parts. An adjusting component is provided on any connecting part for adjusting the distance between the flange 101 and the stator 401. To facilitate the mechanical connection between the rotor 201 and the motor shaft, the rotor 201 in this embodiment is designed as a ring structure, with a bushing 801 internally connected to it. The bushing 801 is connected to the motor shaft to be braked.

[0016] from Figure 2 From the perspective of the electromagnetic coil 501, after the electromagnetic coil 501 is energized, the moving plate 301 will be subjected to the magnetic attraction force from the electromagnetic coil 501. This magnetic attraction force will cause the moving plate 301 to move to the right against the elastic force of several springs until the moving plate 301 separates from the rotor 201. At this time, the rotor 201 can rotate synchronously with the motor shaft. When it is necessary to brake the motor shaft, the electromagnetic coil 501 is de-energized. After the electromagnetic coil 501 is de-energized, the moving plate 301 moves to the left under the elastic force of several first springs until the moving plate 301 presses the rotor 201 tightly onto the flange 101. At this time, the rotor 201 cannot rotate around its own central axis, and the motor shaft is thus braked.

[0017] from Figure 2From the perspective of [the relevant entity], to facilitate the installation of several first springs, in this embodiment, several countersunk holes (not shown in the figure) are provided on the left side of the stator 401 (that is, the side of the stator 401 closer to the moving plate 301). The several countersunk holes are arranged in a circular array about the central axis of the stator 401, and the central axis of any countersunk hole is parallel to the central axis of the stator 401. Several first springs are respectively installed in each countersunk hole, one end of each first spring is connected to the inner bottom wall of the corresponding countersunk hole, and the other end of each first spring is connected to the moving plate 301.

[0018] In this embodiment, after the flange 101, rotor 201, and moving plate 301 are installed, they satisfy the following conditions: the central axis of the flange 101, the central axis of the rotor 201, and the central axis of the moving plate 301 are all collinear with the central axis of the stator 401. Furthermore, to facilitate the installation of the adjustment assembly, the diameters of the rotor 201 and the moving plate 301 are both smaller than the diameters of the flange 101 and the stator 401.

[0019] To facilitate the installation of several connectors, in this embodiment, the stator 401 is provided with several through holes (not marked in the figure) that correspond one-to-one with several connectors. The several through holes are arranged in a circular array about the central axis of the stator 401, and the central axis of any through hole is parallel to the central axis of the stator 401. The several connectors are detachably connected to the several through holes respectively.

[0020] Specifically, in this embodiment, there are three sets of connectors, and therefore three sets of adjusting components. Each connector includes a first rivet 601 passing through the flange 101, a second spring 602 located in the corresponding through hole, and a second rivet 603 located at the end of the corresponding through hole away from the flange 101. The corresponding ends of the second rivet 603 and the corresponding ends of the first rivet 601 extend into the through hole and are respectively connected to the two ends of the spring. The adjusting components are mounted on the first rivet 601.

[0021] Specifically, in this embodiment, the adjustment component includes a plurality of stacked positioning pieces 701, any positioning piece 701 being engaged with a first rivet 601; the distance between the flange 101 and the stator 401 is equal to the sum of the thicknesses of the plurality of positioning pieces 701.

[0022] In order to connect the second spring 602 to the two rivets, in this embodiment, a pull ring (not marked in the figure) is installed at the end of the second rivet 603 located in the through hole and the end of the first rivet 601 located in the through hole, and a hook (not marked in the figure) is provided at both ends of the spring, and the two hooks are connected to the two pull rings respectively.

[0023] Working principle: from Figure 2From the perspective of the electromagnetic coil 501, after the electromagnetic coil 501 is energized, the moving plate 301 will be subjected to the magnetic attraction force from the electromagnetic coil 501. This magnetic attraction force will cause the moving plate 301 to move to the right against the elastic force of several springs until the moving plate 301 separates from the rotor 201. At this time, the rotor 201 can rotate synchronously with the motor shaft. When it is necessary to brake the motor shaft, the electromagnetic coil 501 is de-energized. After the electromagnetic coil 501 is de-energized, the moving plate 301 moves to the left under the elastic force of several first springs until the moving plate 301 presses the rotor 201 tightly onto the flange 101. At this time, the rotor 201 cannot rotate around its own central axis, and the motor shaft is thus braked.

[0024] With prolonged use of this brake, if the wear on the two friction surfaces of rotor 201 (i.e., the contact surface between rotor 201 and flange 101, and the contact surface between rotor 201 and moving plate 301) is significant, the thickness of the braking part of rotor 201 will decrease, affecting the braking effect of the brake. This can be addressed by reducing the number of positioning pieces 701 fastened to the first rivet 601. Reducing the number of positioning pieces 701 decreases the distance between flange 101 and stator 401, keeping the distance between them within a reasonable range. This ensures the braking effect of the brake while avoiding frequent replacement of the moving plate 301 of rotor 201, resulting in low operating costs.

[0025] 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. An adjustable gap electromagnetic brake, characterized in that: The device includes a flange (101), a rotor (201), a moving plate (301), and a stator (401) stacked sequentially. The distance between the rotor (201) and the stator (401) is greater than the thickness of the moving plate (301). The moving plate (301) is connected to the stator (401) by a first spring. An electromagnetic coil (501) is provided inside the stator (401). The flange (101) is detachably connected to the stator (401) by several connecting parts. An adjustment component is provided on any of the connecting parts for adjusting the distance between the flange (101) and the stator (401).

2. The adjustable gap electromagnetic brake according to claim 1, characterized in that: The central axis of the flange (101), the central axis of the rotor (201), and the central axis of the moving plate (301) are all collinear with the central axis of the stator (401); and the diameters of the rotor (201) and the moving plate (301) are both smaller than the diameters of the flange (101) and the stator (401).

3. The adjustable gap electromagnetic brake according to claim 2, characterized in that: The stator (401) has a plurality of through holes corresponding to a plurality of the connectors. The plurality of through holes are arranged in a circular array about the central axis of the stator (401), and the central axis of any one of the through holes is parallel to the central axis of the stator (401). The plurality of connectors are detachably connected to the plurality of through holes respectively.

4. An adjustable gap electromagnetic brake according to claim 3, characterized in that: Any of the connecting components includes a first rivet (601) passing through the flange (101), a second spring (602) located in the corresponding through hole, and a second rivet (603) located at the end of the corresponding through hole away from the flange (101). The corresponding ends of the second rivet (603) and the corresponding ends of the first rivet (601) extend into the through hole and are respectively connected to the two ends of the spring. The adjusting component is disposed on the first rivet (601).

5. An adjustable gap electromagnetic brake according to claim 4, characterized in that: The adjustment assembly includes a plurality of stacked positioning pieces (701), any one of the positioning pieces (701) being engaged with the first rivet (601); the distance between the flange (101) and the stator (401) is equal to the sum of the thicknesses of the plurality of positioning pieces (701).

6. An adjustable gap electromagnetic brake according to claim 4, characterized in that: Both the end of the second rivet (603) located in the through hole and the end of the first rivet (601) located in the through hole are provided with pull rings, and the two ends of the spring are respectively connected to the two pull rings.

Images