Power-off brake

Abstract

The utility model discloses a power-off brake which comprises a magnet yoke body provided with a coil, an armature, a friction disc, two friction plates, a clamping plate and a plurality of connecting assemblies, the connecting assemblies are arranged between the magnet yoke body and the clamping plate, and the armature matched with the magnet yoke body is arranged on the connecting assemblies in a sleeved mode. The magnet yoke body is provided with a spring for pushing the armature to move backwards, a friction disc is arranged between the armature and the clamping plate, the armature and the clamping plate are both provided with friction plates for clamping the friction disc, and compared with the prior art, machining can be convenient and easy, and the machining precision can be easily achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of brakes, in particular to a power-off brake. Background Art

[0002] At present, in the related art, a bidirectional braking type traveling brake for an electric forklift with the application (patent) number: CN202410608638.7, which relates to the field of brakes, includes: a yoke and a mounting plate. The yoke is provided with an outer mounting groove and an inner mounting groove, and coils are installed in both the outer mounting groove and the inner mounting groove. The mounting plate is installed on the yoke through a fixing component, and a first-stage armature plate is sleeved on the fixing component. The yoke is provided with a first-stage hole, and a first-stage spring is arranged in the first-stage hole. A brake disc is arranged between the mounting plate and the first-stage armature plate, and friction plates are arranged on the brake disc. A bushing is installed on the brake disc. A second-stage braking component is arranged between the first-stage armature plate and the yoke. Since the two friction plates are respectively arranged on both sides of the brake disc, after the friction plates are adhesively fixed to the brake disc, due to factors such as the inner diameter precision of component processing and the uniformity of adhesive coating, the assembly precision of the product will be affected. Therefore, during braking, it is inevitable that the working surfaces of the friction plates cannot completely fit the corresponding friction surfaces. Therefore, it is necessary to position with spline teeth or the inner diameter of the bushing, and grind the working surfaces of the two friction plates simultaneously to ensure precision, resulting in inconvenient processing and increased processing difficulty. Summary of the Invention

[0003] The purpose of the utility model is to solve the problems in the prior art, and propose a power-off brake that can be processed conveniently and simply and is easy to achieve processing precision.

[0004] To achieve the above purpose, the utility model proposes a power-off brake, which includes a yoke body installed with a coil, an armature, a friction disc, two friction plates, a clamping plate and a plurality of connecting components. A connecting component is arranged between the yoke body and the clamping plate, and an armature matched with the yoke body is sleeved on the connecting component. A spring for pushing the armature to move backward is arranged on the yoke body. A friction disc is arranged between the armature and the clamping plate. Friction plates are arranged on both the armature and the clamping plate for clamping the friction disc.

[0005] Preferably, the connecting component includes a guide post. One end of the guide post is fixedly connected to the clamping plate, and the other end is fixedly connected to the yoke body through a connecting screw.

[0006] Preferably, one end of the guide post is fixedly connected to the clamping plate by a thread, and a screwing part is arranged on the guide post.

[0007] Preferably, sliding grooves corresponding to and matched with the guide posts one by one are arranged on the circumferential surface of the armature.

[0008] Preferably, the friction disc includes a shaft sleeve and a disc body provided on the shaft sleeve. A connecting mechanism that is slidable but non-rotatable with the main shaft is provided on the shaft sleeve. The connecting mechanism is a connecting hole I with a flat keyway, an involute internal spline hole, a connecting hole II with a plurality of rectangular spline grooves, a connecting hole III with a D-shaped cross-section, or a connecting hole IV with a waist-shaped cross-section.

[0009] The disc body is fixedly connected to the shaft sleeve by a number of fixing screws.

[0010] Two positioning pins are provided on the shaft sleeve and pass through the disc body.

[0011] Advantages of the present utility model: In the present utility model, friction plates are provided on both the armature and the clamping plate. Due to the clamping of the friction disc, when the working surfaces of the friction plates need to be ground after assembly, only the working surfaces of the corresponding friction plates need to be ground, avoiding the inconvenience of simultaneously grinding the working surfaces of the traditional two friction plates. Compared with the prior art, it is convenient and simple to process and easy to achieve the processing accuracy.

[0012] The features and advantages of the present utility model will be described in detail through embodiments in conjunction with the accompanying drawings. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of a power-off brake in Embodiment 1;

[0014] Figure 2 is a schematic diagram of the fixed connection between the shaft sleeve and the disc body in Embodiment 1;

[0015] Figure 3 is a schematic structural diagram of the connecting mechanism in Embodiment 2;

[0016] Figure 4 is a schematic structural diagram of the connecting mechanism in Embodiment 3;

[0017] Figure 5 is a schematic structural diagram of the connecting mechanism in Embodiment 4;

[0018] Figure 6 is a schematic structural diagram of the connecting mechanism in Embodiment 5;

[0019] Figure 7 is a schematic diagram of the fixed connection between the shaft sleeve and the disc body in Embodiment 6;

[0020] Figure 8 is a schematic diagram of the fixed connection between the shaft sleeve and the disc body in Embodiment 7.

[0021] In the figure: 1 - yoke body, 2 - armature, 3 - friction disc, 4 - friction plate, 5 - clamping plate, 6 - connecting component, 7 - spring, 8 - sliding groove, 9 - braking shaft, 61 - guiding column, 62 - screwing part, 31 - bushing, 32 - disc body, 33 - connecting hole I, 34 - involute internal spline hole, 35 - connecting hole II, 36 - connecting hole III, 37 - connecting hole Ⅳ, 38 - fixing screw, 39 - positioning pin, 300 - bushing hole, 310 - positioning body, 311 - clamping body. Detailed implementation mode

[0022] Embodiment 1

[0023] Refer to Figure 1 、 2 A power-off brake of the present utility model includes a yoke body 1 equipped with a coil, an armature 2, a friction disc 3, two friction plates 4, a clamping plate 5 and a plurality of connecting components 6. A connecting component 6 is provided between the yoke body 1 and the clamping plate 5. An armature 2 matched with the yoke body 1 is sleeved on the connecting component 6. A spring 7 for pushing the armature 2 to move backward is provided on the yoke body 1. A friction disc 3 is provided between the armature 2 and the clamping plate 5. Friction plates 4 for clamping the friction disc 3 are provided on both the armature 2 and the clamping plate 5.

[0024] The connecting component 6 includes a guiding column 61. One end of the guiding column 61 is fixedly connected to the clamping plate 5, and the other end is fixedly connected to the yoke body 1 through a connecting screw.

[0025] One end of the guiding column 61 is fixedly connected to the clamping plate 5 by threads, and a screwing part 62 is provided on the guiding column 61.

[0026] Sliding grooves 8 corresponding to and matched with the guiding columns 61 one by one are provided on the circumferential surface of the armature 2.

[0027] The friction disc 3 includes a bushing 31 and a disc body 32 provided on the bushing 31. A connecting mechanism that is slidable and non-rotatable with the main shaft is provided on the bushing 31, and the connecting mechanism is a connecting hole I 33 having a flat key groove.

[0028] A bushing hole 300 through which the bushing 31 can pass is provided on the armature 2.

[0029] The disc body 32 is fixedly connected to the bushing 31 through a plurality of fixing screws 38.

[0030] Two positioning pins 39 penetrating through the disc body 32 are provided on the bushing 31.

[0031] The working process of the present utility model:

[0032] During the operation of a power-off brake of the present utility model, when the brake loses power, a spring 7 pushes an armature 2 and drives a friction plate 4 thereon to move backward. The friction plate 4 pushes a disk body 32 to move backward and presses it against the friction plate 4 on a clamping plate 5. Under the action of friction, it is transmitted through the key fit between a bushing 31 and a flat key on a brake shaft 9 to achieve the purpose of braking the rotation of the brake shaft. When the brake is energized, a yoke body 1 attracts the armature 2, and the friction plate 4 on the armature 2 releases the pressing on the disk body 32, releasing the rotational braking of the brake shaft. The friction disk generates a centrifugal force due to the rotation of the brake shaft and slides away from the friction plate 4 on the clamping plate 5.

[0033] Embodiment 2

[0034] Refer to Figure 3 , the difference between this embodiment and Embodiment 1 is that the connecting mechanism is an involute internal spline hole 34.

[0035] Embodiment 3

[0036] Refer to Figure 4 , the difference between this embodiment and Embodiment 1 is that the connecting mechanism is a connecting hole II 35 with a plurality of rectangular spline grooves.

[0037] Embodiment 4

[0038] Refer to Figure 5 , the difference between this embodiment and Embodiment 1 is that the connecting mechanism is a connecting hole III 36 with a D-shaped cross-section.

[0039] Embodiment 5

[0040] Refer to Figure 6 , the difference between this embodiment and Embodiment 1 is that the connecting mechanism is a connecting hole Ⅳ 37 with a waist-shaped cross-section.

[0041] Of course, the connecting mechanism can also adopt a connecting method for transmitting torque, such as a through hole with a rectangular cross-section or an irregular cross-section.

[0042] Embodiment 6

[0043] Refer to Figure 7 , the difference between this embodiment and Embodiment 1 is that two symmetrically arranged positioning bodies 310 are provided on the bushing 31, and the disk body 32 is sleeved on the positioning bodies 310 and fixedly connected to them by welding.

[0044] Embodiment 7

[0045] Refer to Figure 8 , the difference between this embodiment and Embodiment 1 is that a clamping body 311 for pressing and fixing the disk body 32 on the bushing 31 is provided on the bushing 31, and the clamping body 311 is fixedly connected to the bushing 31 by a fixing screw 38.

[0046] Of course, the bushing 31 and the disk body 32 can also adopt connection methods such as riveting connection or integral molding structure.

[0047] The above embodiments are illustrative of the present invention and not restrictive thereof. Any solution obtained by simply changing the present invention falls within the protection scope of the present invention.

Claims

1. A power-off brake, characterized in that: The invention comprises a yoke body (1) equipped with a coil, an armature (2), a friction disk (3), two friction plates (4), a clamping plate (5) and a plurality of connecting components (6), wherein a connecting component (6) is provided between the yoke body (1) and the clamping plate (5), an armature (2) matching with the yoke body (1) is sleeved on the connecting component (6), a spring (7) for pushing the armature (2) to move backward is provided on the yoke body (1), a friction disk (3) is provided between the armature (2) and the clamping plate (5), and friction plates (4) are provided on both the armature (2) and the clamping plate (5) for clamping the friction disk (3).

2. A power-loss brake according to claim 1, characterized in that: The connecting assembly (6) comprises a guide column (61), one end of the guide column (61) being fixedly connected to the clamping plate (5), and the other end of the guide column (61) being fixedly connected to the yoke body (1) via a connecting screw.

3. A power-off brake according to claim 2, characterized in that: One end of the guide column (61) is fixedly connected to the clamping plate (5) via a thread, and a screwing portion (62) is provided on the guide column (61).

4. A power-off brake according to claim 2, characterized in that: The circumferential surface of the armature (2) is provided with a sliding groove (8) which corresponds one-to-one with and matches the guide column (61).

5. A power-off brake according to claim 1, characterized in that: The friction disc (3) comprises a shaft sleeve (31) and a disc body (32) arranged on the shaft sleeve (31); the shaft sleeve (31) is provided with a connection mechanism that is slidable but non-rotatable with the main shaft.

6. A power-loss brake according to claim 5, characterized in that: The connecting mechanism is a connecting hole I (33) having a flat keyway or an involute internal spline hole (34) or a connecting hole II (35) having a plurality of rectangular spline grooves or a connecting hole III (36) having a D-shaped cross section or a connecting hole IV (37) having a waist-shaped cross section.

7. A power-off brake according to claim 5, characterized in that: The disc body (32) is fixedly connected to the shaft sleeve (31) via a plurality of fixing screws (38).

8. A power-off brake according to claim 7, characterized in that: The shaft sleeve (31) is provided with two positioning pins (39) which penetrate the disc body (32).

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