Electromagnetic brake with small outer diameter and large shaft hole

Abstract

The utility model relates to the technical field of brake, provide a kind of electromagnetic brake of small outer diameter big axle hole, including stator, moving plate, brake disc and flange arranged in sequence, flange is fixedly connected with stator, it further include support screw and locating sleeve, brake disc has the through hole for the locating sleeve to pass through, support screw is used to pass through locating sleeve and the shaft shoulder connection of the power axle connection, locating sleeve limits the distance between shaft shoulder and support screw head portion.The utility model compared with prior art, can realize the basis of small outer diameter big axle hole (in the case where brake small outer diameter makes big power axle axle diameter), not prone to abnormal wear, to reduce noise, avoid jamming.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, and more specifically, to an electromagnetic brake with a small outer diameter and a large shaft hole. Background Technology

[0002] Electromagnetic brakes, as a type of brake, are widely used in various industries. Common electromagnetic brakes include energized braking and de-energized braking. For de-energized electromagnetic brakes, the installation method is typically as follows: the moving plate and brake disc are located between the stator and the flange, which is fixed to the stator with screws or bolts. The working principle is as follows: In the de-energized state, the moving plate presses against the brake disc under the action of a spring, thus achieving braking; when energized, the magnetic yoke attracts the moving plate, separating it from the brake disc, thereby releasing the brake.

[0003] In some existing electromagnetic brakes, such as the patent document with publication number "CN115076259A", the brake disc is fixed to the shoulder of the drive shaft with screws, and several columnar friction elements are set on the brake disc. When the moving plate moves, it squeezes (or releases) the friction elements, thereby achieving braking and releasing the brake. However, in this method, the individual columnar friction elements are prone to tilting, leading to abnormal wear, which in turn causes noise and movement stagnation. Utility Model Content

[0004] The purpose of this invention is to provide an electromagnetic brake with a small outer diameter and a large shaft hole, so as to solve the above-mentioned defects of the prior art.

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

[0006] An electromagnetic brake with a small outer diameter and a large shaft hole includes a stator, a moving plate, a brake disc, and a flange arranged in sequence. The flange is fixedly connected to the stator. The brake disc also includes a support screw and a positioning sleeve. The brake disc has a through hole for the positioning sleeve to pass through. The support screw is used to pass through the positioning sleeve and connect to the shoulder of the power shaft. The positioning sleeve limits the distance between the shoulder and the head of the support screw.

[0007] Furthermore, several sets of the support screws and the positioning sleeves are provided.

[0008] Furthermore, the diameter of the through hole is larger than the diameter of the positioning sleeve.

[0009] Furthermore, friction pads are provided on both sides of the brake disc.

[0010] Furthermore, the brake disc is provided with positioning steps on both sides for positioning the friction pads.

[0011] Furthermore, the flange and the stator are connected and fixed by connecting screws.

[0012] Furthermore, a spacer sleeve is fitted onto the connecting screw to limit the distance between the flange and the stator.

[0013] Furthermore, the moving plate is provided with a positioning groove that mates with the fixed-distance sleeve.

[0014] The technical solution of this utility model has at least the following advantages and beneficial effects: In this utility model, the support screw is connected to the shoulder of the power shaft, and the distance between the shoulder of the power shaft and the head of the support screw is limited by the positioning sleeve (that is, the depth of the support screw being screwed into the shoulder of the power shaft). The brake disc is supported by the positioning sleeve, and the braking is formed by the overall friction of the brake disc instead of multiple columnar friction elements. Compared with the prior art, it can achieve a small outer diameter and large shaft hole (making the shaft diameter of the power shaft large when the brake has a small outer diameter), and it is not easy to have abnormal wear, thereby reducing noise and avoiding jamming. Attached Figure Description

[0015] Figure 1 A front view of an electromagnetic brake with a small outer diameter and a large shaft hole 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 of point B in the image;

[0018] Figure 4 A schematic diagram of the installation state of an electromagnetic brake with a small outer diameter and a large shaft hole provided by this utility model;

[0019] Reference numerals: 1-Stator, 101-Magnetic yoke, 1011-Threaded mounting hole, 102-Coil, 2-Moving plate, 201-Positioning groove, 3-Brake disc, 301-Through hole, 4-Flange, 5-Support screw, 6-Positioning sleeve, 7-Connecting screw, 8-Distance sleeve, 9-Friction pad, 10-Drive shaft. Detailed Implementation

[0020] refer to Figures 1-3An electromagnetic brake with a small outer diameter and a large shaft bore includes a stator 1, a moving plate 2, a brake disc 3, and a flange 4 arranged sequentially, with the flange 4 fixedly connected to the stator 1. Those skilled in the art should understand that the stator 1 consists of a magnetic yoke 1011 and a coil 102, with the coil 102 installed inside the magnetic yoke 101 (unless otherwise specified, the stator 1 in the following description refers to the magnetic yoke 101). Furthermore, it should be understood that the magnetic yoke 101 should also be provided with a spring mounting groove (not shown in the figure), in which a pressure spring (not shown in the figure) is installed. In the de-energized state, the pressure spring provides pressure to the moving plate 2, causing the moving plate 2 to press the brake disc 3, thus forming a brake. In practical applications, a threaded mounting hole 1011 is provided at the end of the stator 1 furthest from the flange 4, through which it is mounted on a mounting surface.

[0021] Based on the above, the brake also includes a support screw 5 and a positioning sleeve 6. The brake disc 3 has a through hole 301 for the positioning sleeve 6 to pass through. In practical applications, refer to... Figure 4 The positioning sleeve 6 is inserted into the through hole 301 on the brake disc 3. The support screw 5 passes through the positioning sleeve 6 and is connected to the shoulder of the power shaft 10. The positioning sleeve 6 limits the distance between the shoulder and the head of the support screw 5, that is, the support screw 5 presses the positioning sleeve 6 tightly. At the same time, the positioning sleeve 6 limits the depth to which the support screw 5 is screwed into the shoulder of the power shaft 10.

[0022] The brake disc 3 is supported by the positioning sleeve 6. Furthermore, there are several sets of supporting screws 5 and positioning sleeves 6. That is to say, if one supporting screw 5 and one positioning sleeve 6 are installed together as a set of connecting structures, then the brake disc 3 is supported by several sets of connecting structures. It is easy to understand that the connecting structures are evenly spaced along the circumference. The brake disc 3 as a whole can move axially, and braking is formed by the friction of the brake disc 3 as a whole instead of multiple columnar friction elements. Compared with the prior art, it can achieve a small outer diameter and large shaft hole (making the shaft diameter of the power shaft 10 large under the condition of a small outer diameter brake), and is less prone to abnormal wear, thereby reducing noise and avoiding jamming.

[0023] Furthermore, the diameter of the through hole 301 is larger than the diameter of the positioning sleeve 6. Specifically, the diameter of the through hole 301 is 0.1-0.6mm larger than the diameter of the positioning sleeve 6, which facilitates installation while ensuring smooth axial movement of the brake disc 3.

[0024] In this embodiment, the flange 4 and the stator 1 are connected and fixed by connecting screws 7. A spacer sleeve 8 is fitted onto the connecting screws 7 to limit the distance between the flange 4 and the stator 1, eliminating the need for manual adjustment of the braking clearance. Furthermore, the moving plate 2 has a positioning groove 201 that mates with the spacer sleeve 8, facilitating radial positioning of the moving plate 2, while the spacer sleeve 8 serves as a guide for the movement of the moving plate 2. In this example, the positioning groove 201 is a notch located on the side edge of the moving plate 2; in other embodiments, the positioning groove 201 could also be a hole penetrating the moving plate 2.

[0025] Friction pads 9 are provided on both sides of the brake disc 3. Alternatively, the friction pads 9 are bonded and fixed to the brake disc 3. Furthermore, positioning steps are provided on both sides of the brake disc 3. The friction pads 9 are placed on the positioning steps before being bonded and fixed to the brake disc 3, which facilitates the initial positioning of the brake disc 3 before bonding and makes the bonding operation simpler.

[0026] 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 small-outer-diameter large-axle-hole electromagnetic brake, comprising a stator, a moving plate, a brake disc and a flange arranged in sequence, the flange being fixedly connected with the stator, characterized in that, It also includes a support screw and a positioning sleeve. The brake disc has a through hole for the positioning sleeve to pass through. The support screw is used to pass through the positioning sleeve and connect to the shoulder of the drive shaft. The positioning sleeve limits the distance between the shoulder and the head of the support screw.

2. The electromagnetic brake with a small outer diameter and a large shaft hole according to claim 1, characterized in that, Several sets of the support screws and the positioning sleeves are provided.

3. The electromagnetic brake with a small outer diameter and a large shaft hole according to claim 1, characterized in that, The diameter of the through hole is larger than the diameter of the positioning sleeve.

4. The electromagnetic brake with a small outer diameter and a large shaft hole according to claim 1, characterized in that, Friction pads are provided on both sides of the brake disc.

5. The electromagnetic brake with a small outer diameter and a large shaft hole according to claim 4, characterized in that, The brake disc has positioning steps on both sides for positioning the friction pads.

6. The electromagnetic brake with a small outer diameter and a large shaft hole according to claim 1, characterized in that, The flange and the stator are connected and fixed by connecting screws.

7. The electromagnetic brake with a small outer diameter and a large shaft hole according to claim 6, characterized in that, A spacer sleeve is fitted onto the connecting screw to limit the distance between the flange and the stator.

8. The electromagnetic brake with a small outer diameter and a large shaft hole according to claim 7, characterized in that, The moving plate is provided with a positioning groove that mates with the fixed-distance sleeve.

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