Low-noise electromagnetic brake

Abstract

The utility model relates to the technical field of brakes, and provides a low-noise electromagnetic brake which comprises a magnet yoke, a movable plate, a spring piece and a flange which are sequentially arranged, the flange is fixedly connected with the magnet yoke, and the spring piece is connected with a power shaft. During braking, the movable plate enables the spring piece to deform, and when braking is relieved, the spring piece recovers deformation and has gaps with the flange and the movable plate; the device further comprises a fixed sleeve, a movable sleeve, an adjusting spring and an adjusting screw, the fixed sleeve is fixedly connected with the power shaft, the movable sleeve is arranged at one end of the fixed sleeve, the adjusting screw penetrates through the movable sleeve to be connected with the fixed sleeve, the spring piece is clamped between the head of the adjusting screw and the movable sleeve, and the adjusting spring is arranged on the adjusting screw in a sleeving mode and pressed between the movable sleeve and the fixed sleeve. The axial position of the spring piece can be adjusted, so that even if the axial position of the spring deviates during initial installation and after leaving a factory, a customer can still adjust the spring at any time during use, and the use is more convenient.

Description

Technical Field

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

[0002] Electromagnetic braking is widely used in various fields. In traditional electromagnetic brakes, after the brake is released, the rotor still contacts the braking surface, generating friction, which reduces the lifespan of the friction pads and produces noise. Patent technology with publication number "CN221743081U" provides a spring-loaded electromagnetic brake that uses a spring plate instead of a rotor. Utilizing the spring plate's automatic reset characteristic, it automatically centers itself upon release, avoiding contact with the braking surface, thus effectively solving the problems of traditional electromagnetic brakes.

[0003] However, in this patented technology, the spring plate is fixedly connected to the power shaft, which requires ensuring that the power output shaft and the brake have high axial positional accuracy in the initial installation state. Otherwise, the spring plate may still be in contact with the flange or moving plate after the brake is released. Moreover, if the spring plate is axially offset after leaving the factory, it is difficult for customers to ensure its correct position during use, which is very inconvenient. Utility Model Content

[0004] The purpose of this invention is to provide a low-noise electromagnetic brake to overcome the aforementioned deficiencies of the prior art.

[0005] This utility model is achieved through the following technical solution:

[0006] A low-noise electromagnetic brake includes a magnetic yoke, a moving plate, a spring plate, and a flange arranged sequentially. The flange is fixedly connected to the magnetic yoke, and the spring plate is connected to a power shaft. When braking, the moving plate deforms the spring plate. When the braking is released, the spring plate returns to its original shape, and there are gaps between the spring plate and the flange and the moving plate. The brake also includes a fixed sleeve, a movable sleeve, an adjusting spring, and an adjusting screw. The fixed sleeve is fixedly connected to the power shaft. The movable sleeve is located at one end of the fixed sleeve. The adjusting screw passes through the movable sleeve and is connected to the fixed sleeve. The spring plate is clamped between the head of the adjusting screw and the movable sleeve. The adjusting spring is sleeved on the adjusting screw and pressed between the movable sleeve and the fixed sleeve.

[0007] Optionally, the movable sleeve and / or the fixed sleeve are provided with receiving grooves for accommodating the end of the adjusting spring.

[0008] Optionally, the fixing sleeve is fitted with and fixedly connected to the power shaft.

[0009] Optionally, the movable sleeve is clearance-fitted with the power shaft.

[0010] Optionally, the flange and the magnetic yoke are connected and fixed by connecting screws; a positioning sleeve is provided on the connecting screw to limit the axial distance between the flange and the magnetic yoke, and the moving plate is provided in a hole that mates with the outer wall of the positioning sleeve.

[0011] Optionally, friction plates are fixed on both sides of the spring sheet.

[0012] Optionally, a mounting screw is inserted through the flange, with the head of the mounting screw located between the flange and the magnetic yoke. The movable plate is provided with a clearance hole to avoid the head of the mounting screw, and the magnetic yoke is provided with an operating hole for a screwing tool to insert.

[0013] Optionally, a dust cover is provided between the flange and the magnetic yoke to seal the gap between them.

[0014] The technical solution of this utility model has at least the following advantages and beneficial effects: In this utility model, the spring sheet is clamped between the head of the adjusting screw and the movable sleeve. By changing the connection depth between the adjusting screw and the fixed sleeve, the axial position of the movable sleeve can be changed by adjusting the spring, thereby realizing the adjustment of the axial position of the spring sheet. In this way, even if there is a deviation in the axial position of the spring during initial installation or after leaving the factory, the customer can still adjust it at any time during use, making it more convenient to use. Attached Figure Description

[0015] Figure 1 A front view of a low-noise electromagnetic brake provided by this utility model;

[0016] Figure 2 for Figure 1 AA section view in the middle;

[0017] Figure 3 for Figure 2 Enlarged view at point B in the middle;

[0018] Reference numerals: 1-Magnetic yoke, 101-Operating hole, 2-Moving plate, 3-Spring plate, 4-Flange, 5-Fixed sleeve, 6-Moving sleeve, 7-Adjusting screw, 8-Adjusting spring, 9-Friction plate, 10-Connecting screw, 11-Positioning sleeve, 12-Mounting screw, 13-Pressure spring, 14-Dustproof plug, 15-Dust cover. Detailed Implementation

[0019] refer to Figures 1-3A low-noise electromagnetic brake includes a magnetic yoke 1, a moving plate 2, a spring plate 3, and a flange 4 arranged in sequence. The flange 4 is fixedly connected to the magnetic yoke 1, and the spring plate 3 is connected to a power shaft (not shown). Those skilled in the art should understand that the magnetic yoke 1 contains a coil. When the coil is de-energized, the brake plate 2 moves away from the magnetic yoke 1 under the action of the pressure spring 13 and, together with the flange 4, holds the spring plate 3 tightly to achieve braking. At the same time, the moving plate 2 causes the spring plate 3 to deform. When the coil is energized, the moving plate 2 overcomes the elastic force of the pressure spring 13 and attracts the magnetic yoke 1. The spring plate 3 returns to its original deformation and there are gaps between it and the flange 4 and the moving plate 2.

[0020] Based on the above, this embodiment adds a fixed sleeve 5, a movable sleeve 6, an adjusting spring 8, and an adjusting screw 7. The fixed sleeve 5 is fixedly connected to the drive shaft. The movable sleeve 6 is located at one end of the fixed sleeve 5. The adjusting screw 7 passes through the movable sleeve 6 and connects to the fixed sleeve 5. The spring plate 3 is clamped between the head of the adjusting screw 7 and the movable sleeve 6. The adjusting spring 8 is sleeved on the adjusting screw 7 and pressed between the movable sleeve 6 and the fixed sleeve 5. With this configuration, by changing the connection depth between the adjusting screw 7 and the fixed sleeve 5, the axial position of the movable sleeve 6 can be changed by adjusting the spring 8, thereby achieving the axial position adjustment of the spring plate 3. In this way, even if there is a deviation in the axial position of the spring during initial installation or after leaving the factory, the customer can still adjust it at any time during use, making it more convenient to use.

[0021] The fixed sleeve 5 is provided with a receiving groove for accommodating the end of the adjusting spring 8. This design facilitates reducing the minimum gap between the movable sleeve 6 and the fixed sleeve 5, thus saving axial space. In other embodiments, the receiving groove may also be provided on the movable sleeve 6, or both the fixed sleeve 5 and the movable sleeve 6 may be provided.

[0022] The fixed sleeve 5 is fitted and fixedly connected to the drive shaft, meaning it is sleeved on the drive shaft, fixed to it, and rotates with it. Specifically, the fixed sleeve 5 and the drive shaft can be fixed by an interference fit; or they can be fitted with a clearance fit, with circumferential fixation achieved by a connecting key and axial fixation achieved by radial screws or retaining rings. Furthermore, the movable sleeve 6 is fitted with the drive shaft with a clearance fit. In practical applications, a large clearance fit is used to ensure the coaxiality of the movable sleeve 6 and the fixed sleeve 5, while also facilitating smooth sliding of the movable sleeve 6 along the drive shaft.

[0023] Friction plates 9 are fixed on both sides of the spring plate 3. The friction plates 9 are bonded and fixed to the spring plate 3. That is, when braking, the friction plates 9 rub against the flange 4 and the moving plate 2 to avoid direct wear of the spring plate 3.

[0024] The flange 4 and the magnetic yoke 1 are connected and fixed by connecting screws 10. Furthermore, a positioning sleeve 11 is fitted on the connecting screws 10. The positioning sleeve 11 is used to limit the axial distance between the flange 4 and the magnetic yoke 1, so as to ensure the working clearance of the moving plate 2. The moving plate 2 is provided with a hole that mates with the outer wall of the positioning sleeve 11. In actual application, the moving plate 2 and the positioning sleeve 11 adopt a clearance fit, which ensures the radial position of the positioning sleeve 11 while also facilitating the smooth movement of the moving plate 2.

[0025] A mounting screw 12 passes through the flange 4 to facilitate the connection and fixation of the brake to the mounting surface. The head of the mounting screw 12 is located between the flange 4 and the magnetic yoke 1. The moving plate 2 has a clearance hole to avoid the head of the mounting screw 12. It is easy to understand that the diameter of the clearance hole is larger than the diameter of the head of the mounting screw 12. Furthermore, the magnetic yoke 1 has an operating hole 101 to facilitate the tightening of the mounting screw 12 by inserting a screw-in tool (such as a screwdriver, hex wrench, etc.). In addition, in practical applications, a dust plug 14 can be provided at the outer end of the operating hole 101 to prevent dust from entering. The dust plug 14 is made of rubber, silicone, or similar materials and is directly pressed and fixed in the operating hole 101.

[0026] A dust cover 15 is provided between the flange 4 and the magnetic yoke 1 to seal the gap between them and provide dust protection. Alternatively, the dust cover 15 can be installed as follows: both ends of the dust cover 15 have annular locking blocks, and the outer sides of the flange 4 and the magnetic yoke 1 have annular grooves that mate with the locking blocks. As is easily understood, the dust cover 15 is typically made of plastic and has a certain degree of elasticity; installation is achieved by simply engaging the annular locking blocks of the dust cover 15 into the annular grooves. In other embodiments, the dust cover 15 can also be installed in other ways, such as by connecting and securing it to the flange 4 and the magnetic yoke 1 with screws respectively.

[0027] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low-noise electromagnetic brake, comprising a magnetic yoke, a moving plate, a spring plate, and a flange arranged sequentially, wherein the flange is fixedly connected to the magnetic yoke, and the spring plate is connected to a drive shaft; during braking, the moving plate deforms the spring plate, and when the braking is released, the spring plate returns to its original deformation, with gaps existing between the spring plate and both the flange and the moving plate; characterized in that, It also includes a fixed sleeve, a movable sleeve, an adjusting spring, and an adjusting screw. The fixed sleeve is connected and fixed to the power shaft. The movable sleeve is located at one end of the fixed sleeve. The adjusting screw passes through the movable sleeve and is connected to the fixed sleeve. The spring plate is clamped between the head of the adjusting screw and the movable sleeve. The adjusting spring is sleeved on the adjusting screw and pressed between the movable sleeve and the fixed sleeve.

2. The low noise electromagnetic brake of claim 1, wherein, The movable sleeve and / or the fixed sleeve are provided with receiving grooves for accommodating the end of the adjusting spring.

3. The low noise electromagnetic brake of claim 1, wherein, The fixed sleeve is fitted with and fixedly connected to the power shaft.

4. The low noise electromagnetic brake of claim 1, wherein, The movable sleeve is clearance-fitted with the power shaft.

5. The low noise electromagnetic brake of claim 1, wherein, The flange and the magnetic yoke are connected and fixed by connecting screws; a positioning sleeve is fitted on the connecting screw to limit the axial distance between the flange and the magnetic yoke, and the movable plate is provided in a hole that mates with the outer wall of the positioning sleeve.

6. The low noise electromagnetic brake of claim 1, wherein, Friction plates are fixed on both sides of the spring sheet.

7. The low noise electromagnetic brake of claim 1, wherein, The flange is fitted with mounting screws, the heads of which are located between the flange and the magnetic yoke. The movable plate is provided with clearance holes to avoid the heads of the mounting screws, and the magnetic yoke is provided with operating holes for screwing tools to be inserted.

8. The low noise electromagnetic brake of claim 1, wherein, A dust cover is provided between the flange and the magnetic yoke to seal the gap between them.

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