Drum type electromagnetic braking device

Abstract

The utility model discloses a drum type electromagnetic braking device. Which comprises a brake drum assembly, a brake bottom plate, a leading shoe assembly and a trailing shoe assembly which are mounted on the brake bottom plate, and a clearance adjuster assembly mounted between one end of the leading shoe assembly and one end of the trailing shoe assembly, and is characterized by further comprising a brake arm assembly and an electromagnet, and the brake arm assembly is arranged on the inner side of the leading shoe assembly and the inner side of the trailing shoe assembly; one end of the brake arm assembly is connected with the brake bottom plate through a fixing shaft, the end, connected with the brake bottom plate, of the brake arm assembly is connected with a fixing top block, the fixing top block is located between the other end of the leading shoe assembly and the other end of the trailing shoe assembly, and the fixing top block abuts against the leading shoe assembly and the trailing shoe assembly. The electromagnet is movably connected to the other end of the brake arm assembly. The brake device is simple in structure, stable and reliable in brake effect, convenient to operate, good in durability and long in service life.

Description

Technical Field

[0001] The utility model relates to a drum type electromagnetic brake device, belonging to the technical field of brakes. Background Art

[0002] Existing parking brakes on light trucks work by pulling the brake handle, which in turn pulls the brake rocker arm via a handbrake cable, creating friction between the brake and the brake drum, thus braking the vehicle. In practice, the cable can stretch significantly, leading to increased travel of the handbrake handle over extended use, which can easily cause parking failure and prevent the vehicle from stopping. Utility Model Content

[0003] In view of the above-mentioned defects in the prior art, the utility model provides a drum-type electromagnetic brake device with a simple structure, stable and reliable braking effect and long service life.

[0004] The utility model is realized through the following technical scheme: a drum-type electromagnetic brake device, comprising a brake drum assembly, a brake base plate, a leading shoe assembly and a trailing shoe assembly mounted on the brake base plate, and a gap adjuster assembly mounted between one end of the leading shoe assembly and the trailing shoe assembly, and characterized in that: it also includes a brake arm assembly and an electromagnet, the brake arm assembly is arranged on the inner side of the leading shoe assembly and the trailing shoe assembly, one end of the brake arm assembly is connected to the brake base plate through a fixed shaft, the end of the brake arm assembly connected to the brake base plate is connected to a fixed top block, the fixed top block is located between the other end of the leading shoe assembly and the trailing shoe assembly, and the fixed top block is in close contact with the leading shoe assembly and the trailing shoe assembly, and the electromagnet is movably connected to the other end of the brake arm assembly.

[0005] When the utility model is working, when current passes through the electromagnet, the electromagnetic force generated attracts the electromagnet to the inner wall of the brake drum assembly, so that the brake drum assembly, the electromagnet, and the brake arm assembly become a whole. At this time, a slight rotation of the brake drum assembly will drive the electromagnet and the brake arm assembly to rotate around the fixed axis. Because the fixed top block on the brake arm assembly is in close contact with the leading shoe assembly and the trailing shoe assembly, when the brake arm assembly rotates around the fixed axis, the leading shoe assembly or the trailing shoe assembly will be rotated by the action of the fixed top block, so that the leading shoe assembly and the trailing shoe assembly are expanded and contact with the brake drum assembly to generate friction, thereby achieving the purpose of slowing down or stopping the rotation of the brake drum assembly.

[0006] Furthermore, a plug plate is provided at one end of the brake arm assembly connected to the electromagnet, a socket is provided in the middle of the electromagnet, the electromagnet is inserted into the plug plate of the brake arm assembly, and a magnet retaining spring is provided on the outside of the electromagnet to connect with the plug plate of the brake arm assembly.

[0007] Furthermore, to facilitate the resetting of the electromagnet, a resetting spring is connected to the bottom of the electromagnet.

[0008] Furthermore, the fixed top block is riveted to the brake arm assembly through a fixing pin, and the fixed top block is a rectangular parallelepiped structure.

[0009] The beneficial effects of the utility model are: the utility model has a simple structure, adopts electromagnetic braking, has high braking efficiency, stable and reliable braking effect, is easy to operate, can achieve braking only when powered on, and will not experience brake attenuation or brake failure after long-term use, has good durability and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the utility model;

[0011] Figure 2 yes Figure 1 Schematic side view (brake drum assembly removed);

[0012] Figure 3 is a schematic front view of the brake arm assembly;

[0013] Figure 4 yes Figure 3 A side view schematic diagram of

[0014] Figure 5 It is a schematic diagram of the main view of the electromagnet;

[0015] Figure 6 yes Figure 5 A cross-sectional schematic diagram;

[0016] Figure 7 It is a schematic diagram of the main view of the magnet retaining spring;

[0017] Figure 8 yes Figure 7 AA section view in;

[0018] Figure 9 This is a schematic diagram of the installation of the brake arm assembly and the electromagnet;

[0019] Figure 10 It is a structural diagram of the regulator assembly;

[0020] Figure 11 yes Figure 10 Schematic diagram of direction B in the figure;

[0021] Figure 12 and Figure 13 It is a schematic diagram of the working state of the utility model;

[0022] Figure 14 It is a schematic diagram of the utility model for parking brake;

[0023] In the figure, 1. adjustment spring, 2. regulator assembly, 3. electromagnet, 4. magnet retaining spring, 5. leading shoe assembly, 6. brake arm assembly, 7. return spring, 8. fixed shaft, 9. following shoe assembly, 10. control switch, 11. brake base plate, 12. brake drum assembly, 13. return spring, 14. transmission assembly, 15. electromagnetic brake device;

[0024] 3-1, jack;

[0025] 6-1. Fixed top block, 6-2. Bushing, 6-3. Fixed pin, 6-4. Insert plate. DETAILED DESCRIPTION

[0026] The present invention will be further described below by way of non-limiting embodiments and in conjunction with the accompanying drawings:

[0027] As attached Figures 1-13As shown, a drum electromagnetic brake device includes a brake drum assembly 12, a brake base plate 11, a leading shoe assembly 5, a trailing shoe assembly 9, a gap adjuster assembly 2, a brake arm assembly 6, and an electromagnet 3. The brake drum assembly 12, the brake base plate 11, the leading shoe assembly 5, the trailing shoe assembly 9, and the gap adjuster assembly 2 in this embodiment are all the same as the relevant structures of the drum brake in the prior art, wherein the leading shoe assembly 5 and the trailing shoe assembly 9 are movably and symmetrically mounted on the brake base plate 11, the gap adjuster assembly 2 is mounted between the lower ends of the leading shoe assembly 5 and the trailing shoe assembly 9, and an adjustment spring 1 is connected between the lower ends of the leading shoe assembly 5 and the trailing shoe assembly 9. The gap adjuster assembly 2 supports the leading and trailing shoe assemblies and adjusts the size of the brake. The adjustment spring 1 can fix the length of the gap adjuster assembly 2 and stabilize the size of the brake; the upper ends of the leading shoe assembly 5 and the trailing shoe assembly 9 are respectively provided with return springs 7 connected thereto. The brake arm assembly 6 is disposed inside the leading shoe assembly 5 and the trailing shoe assembly 9. The brake arm assembly 6 has an arc-shaped arm structure, with a through hole at its upper end. A bushing 6-2 is disposed within the through hole. The upper end of the brake arm assembly 6 is connected to the brake base plate 11 via a fixed shaft 8, which mates with the bushing 6-2. A fixed top block 6-1 is also connected to the end of the brake arm assembly 6 where it connects to the brake base plate 11. The fixed top block 6-1 is a rectangular parallelepiped structure riveted to the brake arm assembly 6 via a fixing pin 6-3. The fixed top block 6-1 is located between the upper ends of the leading shoe assembly 5 and the trailing shoe assembly 9, and is in close contact with the leading shoe assembly 5 and the trailing shoe assembly 9 on either side. An electromagnet 3 is movably connected to the lower end of the brake arm assembly 6. In this embodiment, a plug-in plate 6-4 is provided at one end of the brake arm assembly 6 where it connects to the electromagnet 3. This plug-in plate 6-4 is positioned perpendicular to the plane of the brake arm assembly 6 and is integrally formed or integrally manufactured with the brake arm assembly 6. A socket 3-1 is provided in the center of the electromagnet 3, through which the electromagnet 3 is inserted into the plug-in plate 6-4 of the brake arm assembly 6. A magnetic retaining spring 4 is provided on the outer side of the electromagnet 3, connecting it to the plug-in plate 6-4 of the brake arm assembly 6. The electromagnet 3 is movable on the plug-in plate 6-4. A return spring 13 is connected to the bottom of the electromagnet 3 to facilitate its reset. The electromagnet 3 is conventional and generates electromagnetic force when energized. The electromagnet 3 is electrically connected to a control switch 10.

[0028] The working principle of the present invention is: when the control switch 10 is in the off-circuit state, the electromagnetic brake device is in the original state, and there is a gap of 0.4-0.8mm between the electromagnet and the brake drum assembly. When braking is required, the control switch 10 is in the closed state. At this time, current flows through the electromagnet 3, and the electromagnetic force generated attracts the electromagnet 3 to the inner wall of the brake drum assembly 12, so that the brake drum assembly 12, the electromagnet 3, and the brake arm assembly 6 become a whole. At this time, the slight rotation of the brake drum assembly 12 will drive the electromagnet 3 and the brake arm assembly 6 to rotate around the fixed shaft 8. Because the fixed top block 6-1 on the brake arm assembly 6 is close to the leading shoe assembly 5 and the trailing shoe assembly 9, when the brake arm assembly 6 rotates around the fixed shaft 8, the fixed top block 6-1 will squeeze the leading shoe assembly 5 or the trailing shoe assembly 9, causing the leading shoe assembly 5 or the trailing shoe assembly 9 to rotate, so that the leading shoe assembly 5 and the trailing shoe assembly 9 expand and contact with the brake drum assembly 12 to generate friction, thereby achieving the purpose of slowing down or stopping the rotation of the brake drum assembly 12. As shown in the attached figure Figure 12 As shown, when the electromagnet 3 moves rightward along with the brake drum assembly 12, the fixed top block 6-1 at the upper end of the brake arm assembly 6 squeezes the shoe assembly 5 to expand it; Figure 13 As shown, when the electromagnet 3 moves leftward along with the brake drum assembly 12, the fixed top block 6-1 at the upper end of the brake arm assembly 6 squeezes the shoe assembly 9 to expand it.

[0029] The utility model can be widely used in the fields of elevators, mechanical equipment, automobiles, etc. Figure 14 The figure shows a schematic diagram of the present invention when used for parking brake. The electromagnetic brake device 15 in the present invention is arranged on the transmission assembly 14 of the vehicle. When parking, the control switch 10 is started. When the current passes through the electromagnet 3 of the electromagnetic brake device 15, the electromagnetic force generated attracts the electromagnet 3 to the inner wall of the brake drum assembly. The brake drum assembly drives the electromagnet 3 and the brake arm assembly 6 to rotate, so that the collar shoe opens and fits tightly on the brake drum assembly, which has the effect of braking the entire vehicle and achieves the purpose of parking.

[0030] The other parts of this embodiment are all existing technologies and will not be described in detail here.

Claims

1. A drum electromagnetic brake device comprising a brake drum assembly (12), a brake base plate (11), a leading shoe assembly (5) and a trailing shoe assembly (9) mounted on the brake base plate (11), and a slack adjuster assembly (2) mounted between one end of the leading shoe assembly (5) and the trailing shoe assembly (9), wherein: The invention also includes a brake arm assembly (6) and an electromagnet (3). The brake arm assembly (6) is arranged on the inner side of the leading shoe assembly (5) and the trailing shoe assembly (9). One end of the brake arm assembly (6) is connected to the brake base plate (11) through a fixed shaft (8). The end of the brake arm assembly (6) connected to the brake base plate (11) is connected to a fixed top block (6-1). The fixed top block (6-1) is located between the leading shoe assembly (5) and the other end of the trailing shoe assembly (9). The fixed top block (6-1) is closely attached to the leading shoe assembly (5) and the trailing shoe assembly (9). The electromagnet (3) is movably connected to the other end of the brake arm assembly (6).

2. The drum electromagnetic brake device according to claim 1, characterized in that: An insert plate (6-4) is provided at one end of the brake arm assembly (6) connected to the electromagnet (3), a socket is provided in the middle of the electromagnet (3), the electromagnet (3) is inserted into the insert plate (6-4) of the brake arm assembly (6), and a magnet retaining spring (4) is provided on the outside of the electromagnet (3) and connected to the insert plate (6-4) of the brake arm assembly (6).

3. The drum electromagnetic brake device according to claim 2, characterized in that: The bottom of the electromagnet (3) is connected with a return spring.

4. The drum electromagnetic brake device according to claim 1, 2 or 3, characterized in that: The fixed top block (6-1) is riveted to the brake arm assembly (6) via a fixing pin, and the fixed top block (6-1) is a rectangular parallelepiped structure.

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