Permanent magnet brake with mute protection structure

Abstract

The utility model discloses a permanent magnet brake with a mute protection structure, relates to the field of permanent magnet brakes, and aims to solve the problem that in the prior art, no mute protection structure is arranged on the permanent magnet brake, so that noise generated when the permanent magnet brake works is large. An annular coil is arranged inside the stator, an armature is fixedly arranged at the front end of the stator, a flat plate is connected to the front end of the armature, a rotor is arranged in the middle between the flat plate and the armature, a rotor hub is fixedly arranged in the middle of the rotor, a rotating shaft is fixedly connected to the middle of the rotor hub, and a protective shell is arranged outside the stator. Sound insulation cotton is fixedly arranged on the end face of the inner side of the protective shell, the outer side of the permanent magnet brake is protected through the protective shell, meanwhile, the sound insulation cotton on the inner wall of the protective shell effectively absorbs noise generated when the permanent magnet brake works, and the noise generated in the working process of the permanent magnet brake is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of permanent magnet brake, concretely to a permanent magnet brake with mute protection structure. BACKGROUND

[0002] Permanent magnet brake is a kind of equipment using magnetic field principle to brake. It is mainly composed of permanent magnet, stator and rotor, and brake torque is generated by magnetic field interaction to realize the braking of mechanical equipment. Permanent magnet brake has the advantages of simple structure, high braking efficiency, large torque, fast response speed, environmental protection and no noise, and is suitable for stable braking, high energy efficiency requirements, such as winch, crane, fan and the like.

[0003] For example, the authorized announcement No. CN222296822U, a new type of permanent magnet brake, including stator and rotor, the stator includes coil disc, the coil disc is centrally provided with shaft sleeve, the coil is sleeved on the outer side surface of the shaft sleeve, and the permanent magnet is arranged between the shaft sleeve and the coil disc; the utility model under the same torque specification, the permanent magnet is arranged between the shaft sleeve and the coil disc, the size of permanent magnet brake in axial space is reduced, and then the thickness of permanent magnet brake is thinned to meet the demand of flat installation space, and the reverse electromagnetic force required by the permanent magnet force of the permanent magnet is smaller, and then the operating power is small, and the operating heat quantity is also correspondingly smaller, so that the service life, braking effect and efficiency are guaranteed.

[0004] The permanent magnet brake in the above-mentioned technology is not provided with mute protection structure, so that the noise generated by the permanent magnet brake during operation is large; therefore, there is an urgent need in the market to develop a permanent magnet brake with mute protection structure to help people solve the existing problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a permanent magnet brake with mute protection structure to solve the problem that the permanent magnet brake in the prior art is not provided with mute protection structure, so that the noise generated by the permanent magnet brake during operation is large.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a permanent magnet brake with mute protection structure, including stator and protective shell, the stator is internally provided with annular coil, the stator front end is fixedly provided with armature, the armature front end is connected with flat plate, the middle part between the flat plate and the armature is provided with rotor, the rotor middle part is fixedly provided with rotor hub, the rotor hub middle part is fixedly connected with rotating shaft, the stator middle part is provided with through slot, the rotating shaft rear end extends out of the stator rear end face through the through slot and is fixedly connected with rotating part, the rotating part outer side end face is annularly arrayed and fixedly connected with a plurality of blades, the stator outside is provided with protective shell, the protective shell inboard end face is fixedly provided with soundproof cotton.

[0007] Preferably, the back end of the flat plate is provided with a plurality of first support tubes, and the plurality of first support tubes are in contact with the front end face of the stator through the armature.

[0008] Preferably, the front end face of the stator is provided with a plurality of threaded holes, and the flat plate and the stator are fixed and connected by a plurality of countersunk screws in sequence through the inside of the plurality of first support tubes and the plurality of threaded holes.

[0009] Preferably, the rear end face of the rotating shaft is provided with a rectangular key groove, the front end of the rotating part is fixedly provided with a rectangular key, the rectangular key is inserted into the inside of the rectangular key groove, and the rotating shaft and the rotating part are fixed through two first screws.

[0010] Preferably, the rear end of the protective shell extends to the rear end of the rotating part and is fixedly connected with a circular ventilation net, and the front end of the protective shell extends to the front end of the flat plate and is fixedly connected with an annular ventilation net.

[0011] Preferably, the inside of the protective shell and the outside end face of the stator are supported through a plurality of second support tubes.

[0012] Preferably, the protective shell and the stator are fixed and connected through a plurality of second screws on one side through the protective shell and the middle of the plurality of second support tubes and then inserted into the inside of the stator.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] (1) In the utility model, the outer side of the permanent magnet brake is protected by the protective shell, and the noise of the permanent magnet brake during work is effectively absorbed by the soundproof cotton on the inner wall of the protective shell, so that the noise generated by the permanent magnet brake during work is effectively reduced.

[0015] (2) In the utility model, the linkage design of the blade and the rotating part is introduced, so that the permanent magnet brake can generate airflow during work to actively cool the stator and the surrounding parts. This design not only improves the heat dissipation efficiency of the permanent magnet brake, but also prolongs the service life of the equipment.

[0016] (3) In the utility model, the rear end face of the rotating shaft is provided with a rectangular key groove, the front end of the rotating part is fixedly provided with a rectangular key, the rectangular key is inserted into the inside of the rectangular key groove, and the rotating shaft and the rotating part are fixed through two first screws, so that the connection stability between the rotating shaft and the rotating part is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view of the permanent magnet brake with a mute protection structure.

[0018] Figure 2 is a side sectional view of the utility model;

[0019] Figure 3 is a bottom sectional view of the utility model;

[0020] Figure 4 is an enlarged view of A detail of the utility model.

[0021] In the figure: 1, stator; 101, coil; 102, threaded hole; 103, through slot; 104, armature; 2, flat plate; 201, first support pipe; 202, countersunk screw; 3, rotor; 301, rotor hub; 302, rotating shaft; 303, rectangular key groove; 4, rotating part; 401, blade; 402, rectangular key; 403, first screw; 5, protective shell; 501, soundproof cotton; 502, circular ventilation net; 503, annular ventilation net; 504, second support pipe; 505, second screw. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0023] Please refer to Figures 1-4 The utility model provides an embodiment: a permanent magnet brake with mute protection structure, including stator 1 and protective shell 5, the inside of stator 1 is provided with annular coil 101, stator 1 front end fixedly set up with armature 104, armature 104 front end is connected with flat plate 2, and the middle part between flat plate 2 and armature 104 is provided with rotor 3, and flat plate 2 rear end is provided with a plurality of first support pipes 201, a plurality of first support pipes 201 rear end passes through armature 104 and is pasted with stator 1 front end face, and stator 1 front end face is provided with a plurality of threaded holes 102, and flat plate 2 and stator 1 are fixed by a plurality of countersunk screws 202 in sequence through flat plate 2 and a plurality of first support pipes 201 inside respectively and are inserted into a plurality of threaded holes 102 screw thread connection, and stator 1 outside is provided with protective shell 5, and soundproof cotton 501 is fixedly set up on the inner side end face of protective shell 5, the outside of permanent magnet brake is protected through protective shell 5, and the noise when permanent magnet brake works is effectively absorbed by soundproof cotton 501 on the inner wall of protective shell 5, and the noise when permanent magnet brake works is reduced.

[0024] Please refer to Figure 2 、 Figure 3 and Figure 4The middle part of the rotor 3 is fixedly provided with a rotor hub 301, the middle part of the rotor hub 301 is fixedly connected with a rotating shaft 302, the middle part of the stator 1 is provided with a through slot 103, the rear end of the rotating shaft 302 extends out of the rear end face of the stator 1 through the through slot 103 and is fixedly connected with a rotating part 4, a plurality of blades 401 are fixedly connected in an annular array on the outer side end face of the rotating part 4, a rectangular key groove 303 is arranged on the rear end face of the rotating shaft 302, a rectangular key 402 is fixedly arranged on the front end of the rotating part 4, the rectangular key 402 is inserted into the inside of the rectangular key groove 303, the rotating shaft 302 and the rotating part 4 are fixed through two first screws 403, when the rotating shaft 302 works and rotates, the rotating part 4 is synchronously driven to rotate, so that the rotating part 4 drives the plurality of blades 401 to rotate when rotating, and the front end of the blade 401 blows air, so that the stator 1 is cooled when working.

[0025] Please refer to Figure 2 and Figure 3 The rear end of the protective shell 5 extends to the rear end of the rotating part 4 and is fixedly connected with a circular ventilation net 502, the front end of the protective shell 5 extends to the front end of the flat plate 2 and is fixedly connected with an annular ventilation net 503, the inside of the protective shell 5 and the outer side end face of the stator 1 are supported through a plurality of second support pipes 504, the protective shell 5 and the stator 1 are fixedly connected through a plurality of second screws 505 which pass through the middle part of the protective shell 5 and the plurality of second support pipes 504 and are then inserted into the inside of the stator 1, so that the rotation of the blade 401 sends external air into the inside of the protective shell 5 through the circular ventilation net 502 to cool the stator 1, and the air is sent out from the annular ventilation net 503 after passing through the inside of the protective shell 5, so that the circulation of the air in the inside of the protective shell 5 and the external air is realized, and the heat dissipation efficiency is improved.

[0026] Working principle: when in use, the coil 101 in the inside of the stator 1 is electrified to generate a magnetic field which interacts with the permanent magnet in the rotor 3 to generate a braking torque. The rotating shaft 302 rotates with the rotor 3, and through the cooperation of the rectangular key 402 and the rectangular key groove 303 and the fixation of the first screw 403, the rotating part 4 and the blades 401 thereon are synchronously driven to rotate. The rotation of the blade 401 generates air flow to suck external air into the inside of the protective shell 5 through the circular ventilation net 502 to effectively cool the stator 1 and the surrounding components. The cooled air is then discharged from the annular ventilation net 503 to form a circulating heat dissipation system, ensuring the efficient and stable operation of the permanent magnet brake. At the same time, the protective shell 5 and the sound insulation cotton 501 inside it effectively isolate the noise generated during the operation of the permanent magnet brake, greatly reducing noise pollution and providing a quieter use environment for users.

[0027] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A permanent magnet brake with a silent protection structure, comprising a stator (1) and a protective housing (5), characterized in that: The stator (1) is provided with an annular coil (101) inside. An armature (104) is fixedly provided at the front end of the stator (1). A plate (2) is connected to the front end of the armature (104). A rotor (3) is provided in the middle between the plate (2) and the armature (104). A rotor hub (301) is fixedly provided in the middle of the rotor (3). A rotating shaft (302) is fixedly connected in the middle of the rotor hub (301). A through slot (103) is provided in the middle of the stator (1). The rear end of the rotating shaft (302) passes through the through slot (103) and extends out of the rear end face of the stator (1) and is fixedly connected to a rotating component (4). Multiple blades (401) are fixedly connected in an annular array on the outer end face of the rotating component (4). A protective shell (5) is provided outside the stator (1). Sound insulation cotton (501) is fixedly provided on the inner end face of the protective shell (5).

2. The permanent magnet brake with mute protection structure according to claim 1, characterized in that: The rear end of the plate (2) is provided with a plurality of first support tubes (201), and the rear ends of the plurality of first support tubes (201) pass through the armature (104) and are attached to the front end face of the stator (1).

3. The permanent magnet brake with mute protection structure according to claim 1, characterized in that: The stator (1) has multiple threaded holes (102) on its front end face. The plate (2) and the stator (1) are connected and fixed by multiple countersunk screws (202) passing through the plate (2) and multiple first support tubes (201) in sequence and then being inserted into the multiple threaded holes (102).

4. The permanent magnet brake with mute protection structure according to claim 1, characterized in that: The rear end face of the rotating shaft (302) is provided with a rectangular keyway (303), and the front end of the rotating component (4) is fixedly provided with a rectangular key (402). The rectangular key (402) is inserted into the rectangular keyway (303), and the rotating shaft (302) and the rotating component (4) are fixed together by two first screws (403).

5. The permanent magnet brake with mute protection structure according to claim 1, characterized in that: The rear end of the protective housing (5) extends to the rear end of the rotating part (4) and is fixedly connected to a circular ventilation net (502). The front end of the protective housing (5) extends to the front end of the plate (2) and is fixedly connected to an annular ventilation net (503).

6. The permanent magnet brake with mute protection structure according to claim 1, characterized in that: The protective housing (5) is supported by multiple second support tubes (504) between its interior and the outer end face of the stator (1).

7. The permanent magnet brake with mute protection structure according to claim 6, characterized in that: The protective housing (5) and the stator (1) are fixed by multiple second screws (505) passing through the middle of the protective housing (5) and multiple second support tubes (504) and then being inserted into the internal thread of the stator (1).

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