CN111810555A

CN111810555A - Electromagnetic clutch

Info

Publication number: CN111810555A
Application number: CN201910293609.5A
Authority: CN
Inventors: 杨小铖; 王建雄; 王江华; 李庆友; 陈林; 李超
Original assignee: Guizhou Zhenhua Qunying Electric Appliance Co ltd State Owned No 891 Factory
Current assignee: Guizhou Zhenhua Qunying Electric Appliance Co ltd State Owned No 891 Factory
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2020-10-23

Abstract

The invention discloses an electromagnetic clutch which comprises a clutch body and magnetic steel (14), wherein the magnetic steel is arranged between a connecting plate (15) and a spring (13) in the clutch body. The electromagnetic clutch provided by the invention utilizes the magnetic attraction of the magnetic steel 14 to reduce the distance between the spring and the armature in the electromagnetic clutch, thereby reducing the larger vibration of the armature caused by smaller force ratio provided by the spring without deformation in the engaging and disengaging processes of the electromagnetic clutch and ensuring the torque which can be transmitted by the electromagnetic clutch.

Description

Electromagnetic clutch

Technical Field

The present invention relates to an electromagnetic clutch.

Background

The electromagnetic clutch controls the connection and the separation of the clutch by the on-off of a coil, is an electric appliance capable of automatically executing the connection and the separation when the power is on and off, is widely applied to various mechanisms to realize the functions of quick start, braking, positive and negative rotation or speed regulation and the like, and is easy to realize remote control.

The electromagnetic clutch consists of a magnetic circuit part and an armature part, and the armature part is meshed with the magnetic circuit part by applying voltage to a coil in the working process to transmit torque; the coil is de-energized, the armature portion is separated from the magnetic circuit portion, and torque transmission is interrupted.

The vibration performance of the electromagnetic clutch refers to the capability of the electromagnetic clutch that the electromagnetic clutch can normally work in a vibration environment without generating misoperation, and the large vibration magnitude that the electromagnetic clutch can bear indicates that the vibration performance of the electromagnetic clutch is good.

At present, after the power of an electromagnetic clutch widely applied is cut off, a common pressure spring or reed is used for providing restoring force, and the spring or reed has the characteristic that the larger the deformation is, the larger the restoring force is, when an electromagnetic brake is not electrified, the spring or reed is not deformed and can not provide force, so that the electromagnetic clutch is in a separated state, and the error action of joint is caused due to vibration, thereby influencing the accuracy of torque transmission of the electromagnetic clutch.

Disclosure of Invention

In order to solve the problem of poor vibration performance of the conventional electromagnetic clutch, the present invention aims to provide an electromagnetic clutch having good vibration performance and capable of reducing the influence of vibration generated when the electromagnetic clutch is engaged and disengaged on torque transmittable by the electromagnetic clutch.

To achieve the object of the present invention, there is provided an electromagnetic clutch including a clutch body and a magnetic steel installed between a connecting plate and a spring in the clutch body. When the electromagnetic clutch is powered off, the air gap between the armature iron and the magnetic steel in the electromagnetic clutch is minimum, the attraction force generated by the magnetic steel is maximum, and the vibration performance is greatly improved; when working voltage is applied to the electromagnetic clutch, the air gap between the armature iron and the magnetic steel in the electromagnetic clutch is the largest, and the minimum suction force generated by the magnetic steel has little influence on the torque which can be transmitted by the electromagnetic clutch; the vibration performance of the electromagnetic clutch is improved.

The invention has the beneficial effects that: the electromagnetic clutch improves the vibration performance of the electromagnetic clutch and can well meet severe environment factors.

Drawings

FIG. 1 is a schematic view of the internal structure of an electromagnetic clutch provided by the present invention;

FIG. 2 is a schematic view of a tooth ring structure;

in the figure: 1-armature part, 11-armature, 12-tooth ring I, 13-spring, 14-magnetic steel, 15-connecting plate, 2-magnetic circuit part, 21-rotor, 22-magnetic yoke, 23-coil, 24-tooth ring II, 25-leading-out terminal.

Detailed Description

The electromagnetic clutch provided by the invention is described in detail with reference to the accompanying drawings and embodiments.

The structure of the electromagnetic clutch provided by the invention is illustrated by figure 1, and comprises any existing electromagnetic clutch body and magnetic steel 14, wherein the magnetic steel 14 is specifically arranged between a connecting plate 15 and a spring 13 in the electromagnetic clutch body, and the magnetic attraction of the magnetic steel 14 is utilized to reduce the distance between the spring and an armature in the electromagnetic clutch, so that the larger vibration caused by the larger distance between the spring and the armature in the process of jointing and separating the electromagnetic clutch is reduced, and the torque which can be transmitted by the electromagnetic clutch is ensured.

The electromagnetic clutch body described in the invention can be any one of the existing electromagnetic clutches, the electromagnetic clutch body provided herein comprises an armature part 1 and a magnetic circuit part 2, wherein the armature part 1 comprises an armature 11, a spring 13 and a connecting plate 15, the magnetic circuit part comprises a movable disc 21, a magnetic yoke 22, a coil 23 and an outlet 25, the magnetic yoke 22 is positioned at the periphery of the movable disc 21, the coil 23 is installed in the magnetic yoke 22, the outlet 25 is connected with the movable disc 21 and the coil 23 for loading and exciting the movable disc 21 and the coil 23 to rotate the movable disc 21 and generate an electric field around the coil 23; the armature 11 is arranged at the upper end of the movable disc 21, the spring 13 is arranged on the connecting plate 15, and the armature 11 is opposite to the spring 13; after the leading-out end 25 is loaded and excited, the movable disc 21 rotates, the coil 23 is electrified, an electric field is formed around the movable disc 21, the movable disc 21 rotates to perform cutting electric field motion, a magnetic field is generated, and the magnetic steel 14 is attracted with the armature 11; when the excitation applied to the terminals 25 disappears, the magnetic steel 14 separates from the armature 11.

When no excitation is loaded on the leading-out terminal 25, the air gap between the armature 11 and the magnetic steel 14 is minimum, the suction force generated by the magnetic steel 14 is maximum, and the vibration performance is greatly improved; when working voltage is applied to the leading-out terminal 25, the air gap between the armature 11 and the magnetic steel 14 is the largest, the suction force generated by the magnetic steel 14 is the smallest, and the influence of the torque which can be transmitted by the electromagnetic clutch is little.

Here, the rotary disk 21 in the electromagnetic clutch body provided by the present invention is a rotor, and further, the spring 13 and the coil 23 are mounted on the connecting plate 15 and in the yoke 22 through the ring gear i 12 and the ring gear ii 24, respectively.

The yoke 22 is a stator.

Here, fig. 2 is a schematic structural diagram of the tooth ring, the tooth ring is in a face tooth structure, when the electromagnetic clutch is engaged, two tooth ring face teeth are engaged, so that torque can be transmitted, and the torque ratio that can be transmitted is larger than that in a friction plate form through the face tooth engagement.

Through vibration tests, compared with the traditional electromagnetic clutch, the vibration performance of a product applying the electromagnetic clutch is improved by 200%, the vibration performance is greatly improved under the condition that the appearance and parameter indexes of the original product are not changed, severe environment factors can be well met, and the electromagnetic clutch has a good application prospect.

The embodiments described above are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The embodiments and features of the embodiments of the present invention may be arbitrarily combined with each other without conflict.

Claims

1. An electromagnetic clutch, characterized in that: the clutch comprises a clutch body and magnetic steel (14), wherein the magnetic steel is arranged between a connecting plate (15) and a spring (13) in the clutch body.

2. The electromagnetic clutch of claim 1 wherein: the clutch body comprises an armature (11), a spring (13), a connecting plate (15), a movable disc (21), a magnetic yoke (22), a coil (23) and an outlet end (25), wherein the magnetic yoke (22) is positioned on the periphery of the movable disc (21), the coil (23) is installed in the magnetic yoke (22), and the outlet end (25) is connected with the movable disc (21) and the coil (23) and is used for loading and exciting on the movable disc (21) and the coil (23); the armature (11) is installed at the upper end of the movable disc (21), and the spring (13) is installed on the connecting plate (15).

3. The electromagnetic clutch of claim 2 wherein: the movable disc (21) is a rotor.

4. The electromagnetic clutch of claim 2 wherein: the clutch body further comprises a tooth ring I (12), and the spring (13) is installed on the connecting plate (15) through the tooth ring I (12).

5. The electromagnetic clutch of claim 2 wherein: the clutch body further comprises a tooth ring II (24), and the coil (23) is installed in the magnet yoke (22) through the tooth ring II (24).