Electromagnetic brake capable of reducing vibration and noise

Abstract

The electromagnetic brake comprises a magnet yoke iron core, a movable plate, a friction disc, a coil, an armature and a shaft sleeve, the friction disc is arranged on the inner ring of the magnet yoke iron core, the coil is arranged in the magnet yoke iron core, the movable plate and the armature are located at the two ends of the friction disc respectively, and the shaft sleeve is arranged on the movable plate. The armature can drive the movable plate to move in the axial direction of the magnet yoke iron core, the shaft sleeve is meshed with the friction disc through teeth, a plurality of first flat teeth are arranged on the friction disc, second flat teeth corresponding to the first flat teeth are arranged on the shaft sleeve, and spring pieces are fixed to the first flat teeth. The spring piece arranged between the first flat tooth and the second flat tooth is compressed, the free end of the spring piece abuts against the second flat tooth through elastic force, a gap between the friction disc and the shaft sleeve is eliminated, collision between the friction disc and the shaft sleeve can be avoided, and friction generated by collision between the friction disc and the shaft sleeve is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic brake technology for vibration reduction and noise reduction, and particularly to an electromagnetic brake for vibration reduction and noise reduction. Background Technology

[0002] In the vibration-damping and noise-reducing electromagnetic brake, the friction disc is connected to the drive shaft of the equipment through a bushing. That is, the inner ring of the bushing is connected to the drive shaft, and the outer ring is fitted with the friction disc. During the braking process, the vibration-damping and noise-reducing electromagnetic brake squeezes the friction disc axially, and brakes the drive shaft through the bushing. Since the axial position of the friction disc changes when switching between braking and release states, a clearance fit is generally used between the bushing and the friction disc.

[0003] When the electromagnetic brake with vibration reduction and noise reduction is released, the drive shaft drives the friction disc to rotate through the bushing. As the friction disc lags behind the bushing in rotation, a collision occurs between the two, which will produce a very loud noise. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electromagnetic brake that reduces vibration and noise. This invention uses a spring plate that is compressed between the first and second flat teeth. The free end of the spring plate then abuts against the second flat tooth through elastic force, thereby eliminating the gap between the friction disc and the bushing. This avoids collisions between the friction disc and the bushing, and greatly reduces the friction caused by their collision.

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

[0006] An electromagnetic brake for vibration reduction and noise reduction includes a magnetic yoke core, a movable plate, a friction disc, a coil, an armature, and a bushing. The friction disc is disposed within the inner ring of the magnetic yoke core, and the coil is disposed inside the magnetic yoke core. The movable plate and the armature are located at opposite ends of the friction disc, and the armature can drive the movable plate to move axially along the magnetic yoke core. The bushing engages with the friction disc via teeth. The friction disc has multiple first flat teeth, and the bushing has a second flat tooth corresponding to the first flat teeth. A spring plate is fixed on each of the first flat teeth, and the spring plate abuts against the first and second flat teeth respectively, and the spring plate is in a compressed state.

[0007] Furthermore, the spring sheet includes a horizontal first connecting plate, a horizontal second connecting plate, an inclined third connecting plate, and an arc-shaped deformation plate. The two ends of the deformation plate are respectively connected to the end of the first connecting plate and one end of the third connecting plate, and the end of the third connecting plate away from the deformation plate is connected to the second connecting plate.

[0008] The first connecting plate is fixed to the first flat tooth, and the second connecting plate abuts against the second flat tooth.

[0009] Furthermore, the first connecting plate is welded and fixed to the first flat tooth.

[0010] Furthermore, the first connecting plate is fixed to the first flat tooth by bolts.

[0011] Furthermore, the armature and the movable plate are connected by a connector, which passes through the magnetic yoke core and slides with the magnetic yoke core.

[0012] Furthermore, the magnetic yoke core is provided with a sliding hole, and the movable plate is provided with a connecting hole coaxial with the sliding hole;

[0013] The connector includes a sliding sleeve and a countersunk bolt. The sliding sleeve is slidably disposed in a sliding hole, and the countersunk bolt coaxially passes through the armature and the sliding sleeve in sequence before connecting to the connecting hole.

[0014] Furthermore, the connecting hole is a threaded hole, and the countersunk bolt is threadedly connected to the connecting hole.

[0015] Furthermore, the connecting hole is a through hole, and a positioning sleeve is provided inside the through hole. The first end of the positioning sleeve extends coaxially into the sliding sleeve, and the second end of the positioning sleeve is provided with an annular limiting plate with a diameter larger than that of the connecting hole. The positioning sleeve is provided with an internal thread that is compatible with the countersunk bolt.

[0016] The beneficial effects of this utility model are:

[0017] This invention utilizes a spring sheet positioned between the first and second flat teeth. When the spring sheet is compressed, its free end abuts against the second flat tooth through elastic force, thereby eliminating the gap between the friction disc and the bushing. This prevents collisions between the friction disc and the bushing, and greatly reduces the friction caused by their collisions. Attached Figure Description

[0018] Figure 1 This is a perspective view of the vibration-reducing and noise-reducing electromagnetic brake in an embodiment of this utility model;

[0019] Figure 2 Rear view of an electromagnetic brake designed for vibration and noise reduction;

[0020] Figure 3 for Figure 2 Sectional view along line AA;

[0021] Figure 4 A front view of an electromagnetic brake designed for vibration and noise reduction;

[0022] Figure 5 for Figure 4Enlarged view of point C in the middle section;

[0023] Figure 6 A cross-sectional view of an electromagnetic brake designed for vibration and noise reduction;

[0024] Figure 7 for Figure 6 Enlarged schematic diagram of point D in the middle section;

[0025] In the diagram, 1. Magnetic yoke core; 2. Movable plate; 3. Friction disc; 4. Armature; 5. Bushing; 6. First flat tooth; 7. Second flat tooth; 8. Spring plate; 9. First connecting plate; 10. Second connecting plate; 11. Positioning sleeve; 12. Annular limiting plate; 13. Third connecting plate; 14. Deformation plate; 15. Sliding sleeve; 16. Countersunk bolt. Detailed Implementation

[0026] 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.

[0027] See Figures 1-7 This utility model provides a technical solution: Example

[0028] like Figures 1-5 As shown, an electromagnetic brake for vibration reduction and noise reduction includes a magnetic yoke core 1, a movable plate 2, a friction disc 3, a coil, an armature 4, and a bushing 5. The friction disc 3 is disposed within the inner ring of the magnetic yoke core 1, and the coil is disposed inside the magnetic yoke core 1. The movable plate 2 and the armature 4 are respectively located at both ends of the friction disc 3, and the armature 4 can drive the movable plate 2 to move along the axial direction of the magnetic yoke core 1. The bushing 5 is engaged with the friction disc 3 by teeth. The friction disc 3 is provided with a plurality of first flat teeth 6, and the bushing 5 is provided with a second flat tooth 7 corresponding to the first flat teeth 6. A spring plate 8 is fixed on the first flat teeth 6, and the spring plate 8 abuts against the first flat teeth 6 and the second flat teeth 7 respectively. The spring plate 8 is in a compressed state.

[0029] The spring plate 8 includes a horizontal first connecting plate 9, a horizontal second connecting plate 10, an inclined third connecting plate 13, and an arc-shaped deformation plate 14. The two ends of the deformation plate 14 are respectively connected to the end of the first connecting plate 9 and one end of the third connecting plate 13. The end of the third connecting plate 13 away from the deformation plate 14 is connected to the second connecting plate 10.

[0030] The first connecting plate 9 is fixed to the first flat tooth 6, and the second connecting plate 10 abuts against the second flat tooth 7.

[0031] The first connecting plate 9 is welded to the first flat tooth 6 or fixed with bolts. When the two are fixed with bolts, it is convenient to replace the spring plate 8 if it fails.

[0032] The armature 4 is connected to the movable plate 2 by a connector, which passes through the magnetic yoke core 1 and slides with the magnetic yoke core 1.

[0033] The magnetic yoke core 1 is provided with a sliding hole, and the movable plate 2 is provided with a connecting hole coaxial with the sliding hole;

[0034] The connector includes a sliding sleeve 15 and a countersunk bolt 16. The sliding sleeve 15 is slidably disposed in a sliding hole, and the countersunk bolt 16 coaxially passes through the armature 4 and the sliding sleeve 15 in sequence before connecting to the connecting hole.

[0035] The connecting hole is a threaded hole, and the countersunk bolt 16 is threadedly connected to the connecting hole.

[0036] The specific structure and connection relationship of the magnetic yoke core 1, movable plate 2, friction disk 3, coil, armature 4 and bushing 5 are existing technologies and will not be described in detail here.

[0037] Since the friction disc 3 and the bushing 5 have a clearance fit, a first flat tooth 6 and a second flat tooth 7 are provided as a connecting platform. The height of both the first flat tooth 6 and the second flat tooth 7 is less than the tooth height, thus forming a gap between the first flat tooth 6 and the second flat tooth 7 for installing the spring plate 8. At the same time, the area of ​​the tooth tip of the first flat tooth 6 and the second flat tooth 7 is widened, and its area is 3-5 times that of other individual teeth. During installation, the contact area between the flat tooth tip and the spring plate 8 can be increased, ensuring the gap elimination effect.

[0038] The spring plate 8, positioned between the first flat tooth 6 and the second flat tooth 7, is compressed. Consequently, the free end of the spring plate 8 (the second connecting plate 10) abuts against the second flat tooth 7 through elastic force, thereby eliminating the gap between the friction disc 3 and the bushing 5. This prevents collisions between the friction disc 3 and the bushing 5, and greatly reduces the friction caused by their collision. Example

[0039] like Figure 6 and Figure 7 As shown, the difference between this embodiment and embodiment 1 is that the connecting hole is a through hole, and a positioning sleeve 11 is provided in the through hole. The first end of the positioning sleeve 11 extends coaxially into the sliding sleeve 15, and the second end of the positioning sleeve 11 is provided with an annular limiting plate 12 with a diameter larger than that of the connecting hole. The positioning sleeve 11 is provided with an internal thread that is compatible with the countersunk bolt 16.

[0040] When the countersunk bolt 16 is directly threaded to the movable plate 2, the alignment is difficult when the countersunk bolt 16 enters the threaded hole due to the presence of the sliding sleeve 15 in the middle.

[0041] In this embodiment, when the countersunk bolt 16 is connected, the sliding sleeve 15 is first inserted into the sliding hole, and then the first end of the positioning sleeve 11 is inserted into the sliding sleeve 15 through the connecting hole to make the two coaxial. When the countersunk bolt 16 enters the sliding sleeve 15, it is naturally coaxial with the positioning sleeve 11. At this time, the countersunk bolt 16 can be easily screwed into the positioning sleeve 11. When the countersunk bolt 16 is screwed in, the positioning sleeve 11 is tightened at the same time, so that the annular limiting plate 12 is tightened on the movable plate 2.

[0042] 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 electromagnetic brake for vibration reduction and noise reduction, comprising a magnetic yoke core, a movable plate, a friction disc, a coil, an armature, and a bushing, wherein the friction disc is disposed within the inner ring of the magnetic yoke core, the coil is disposed inside the magnetic yoke core, the movable plate and the armature are respectively located at both ends of the friction disc, and the armature can drive the movable plate to move axially along the magnetic yoke core, and the bushing engages with the friction disc via teeth, characterized in that: The friction disc is provided with a plurality of first flat teeth, and the bushing is provided with a second flat tooth corresponding to the first flat teeth. A spring plate is fixed on the first flat tooth, and the spring plate abuts against the first flat tooth and the second flat tooth respectively, and the spring plate is in a compressed state.

2. The electromagnetic brake for vibration reduction and noise reduction according to claim 1, characterized in that: The spring sheet includes a horizontal first connecting plate, a horizontal second connecting plate, an inclined third connecting plate, and an arc-shaped deformation plate. The two ends of the deformation plate are respectively connected to the end of the first connecting plate and one end of the third connecting plate. The end of the third connecting plate away from the deformation plate is connected to the second connecting plate. The first connecting plate is fixed to the first flat tooth, and the second connecting plate abuts against the second flat tooth.

3. The electromagnetic brake for vibration reduction and noise reduction according to claim 2, characterized in that: The first connecting plate is welded and fixed to the first flat tooth.

4. The electromagnetic brake for vibration reduction and noise reduction according to claim 2, characterized in that: The first connecting plate is fixed to the first flat tooth by bolts.

5. The electromagnetic brake for vibration reduction and noise reduction according to claim 1, characterized in that: The armature and the movable plate are connected by a connector that passes through the magnetic yoke core and slides with it.

6. The electromagnetic brake for vibration reduction and noise reduction according to claim 5, characterized in that: The magnetic yoke core is provided with a sliding hole, and the movable plate is provided with a connecting hole coaxial with the sliding hole; The connector includes a sliding sleeve and a countersunk bolt. The sliding sleeve is slidably disposed in a sliding hole, and the countersunk bolt coaxially passes through the armature and the sliding sleeve in sequence before connecting to the connecting hole.

7. The electromagnetic brake for vibration reduction and noise reduction according to claim 6, characterized in that: The connecting hole is a threaded hole, and the countersunk bolt is threadedly connected to the connecting hole.

8. The electromagnetic brake for vibration reduction and noise reduction according to claim 6, characterized in that: The connecting hole is a through hole, and a positioning sleeve is provided inside the through hole. The first end of the positioning sleeve extends coaxially into the sliding sleeve, and the second end of the positioning sleeve is provided with an annular limiting plate with a diameter larger than that of the connecting hole. The positioning sleeve is provided with an internal thread that is compatible with the countersunk bolt.

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