Miniature air compression disc brake

Abstract

The utility model discloses a miniature air compression disc brake which comprises an upper air cylinder. A step is installed at the bottom of one side of the upper air cylinder, a lower air cylinder is installed at the bottom of the step, air channels are formed in the upper air cylinder, the step and the lower air cylinder in a penetrating mode, pistons are installed in the upper air cylinder and the lower air cylinder, sealing rings are installed on the outer sides of the pistons, and brake pads are installed on the sides, close to each other, of the pistons. A spring is mounted on the outer side of the piston; the spring and the sealing ring are used in cooperation, the piston automatically returns to the original position through the pressure of the internal spring after air is cut off, the brake pad cannot make contact with a brake disc any more, abnormal sound is avoided, abrasion of the brake pad is reduced, the service life is prolonged, only the sealing ring of the internal piston makes contact with the cylinder wall, the inner wall cannot be scratched by smearing lubricating grease, and the service life is prolonged. And the service life of the whole brake is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of emergency brakes, in particular to a miniature pneumatic disc brake. Background Art

[0002] Pneumatic disc brakes are pneumatic brakes, which are a relatively old working transmission part. They mainly work by air pressure. Because they use air pressure, pneumatic disc brakes are more environmentally friendly, durable, and have low manufacturing costs.

[0003] The existing brakes of the same type are of micro-reset type, which use 3mm O-type spring washers for reset. After the brake is cut off, the brake pads are still close to the brake disc, which may cause slight abnormal noise and it is troublesome to replace the brake pads. The piston in the cylinder needs to be forced back to its original position, and the internal retaining spring will scratch the smooth inner wall of the cylinder, which will affect its service life. Utility Model Content

[0004] The purpose of the utility model is to provide a miniature pneumatic disc brake to solve the problem that the existing brakes of the same type proposed in the above background technology are of micro-reset type and use 3mm O-type spring washers for reset. After the brake is de-energized, the brake pads are still tightly attached to the brake disc, which may cause slight abnormal noises and is troublesome to replace the brake pads. The piston in the cylinder needs to be forcibly pushed back to its original position, and the internal retaining spring may scratch the smooth inner wall of the cylinder, thereby affecting its service life.

[0005] The utility model provides the following technical solution: a miniature pneumatic disc brake, comprising an upper cylinder; a step is installed at the bottom of one side of the upper cylinder, a lower cylinder is installed at the bottom of the step, an air passage is penetrated inside the upper cylinder, the step and the lower cylinder, pistons are installed inside the upper cylinder and the lower cylinder, a sealing ring is installed on the outer side of the piston, a brake pad is installed on the side close to the piston, and a spring is installed on the outer side of the piston.

[0006] Preferably, an air inlet is provided on the side of the upper cylinder.

[0007] Preferably, an O-ring is installed on the outside of the airway.

[0008] Preferably, a fixing screw is installed on the top of the upper cylinder.

[0009] Preferably, a piston retaining ring is installed inside the upper cylinder and the lower cylinder near the top of the brake pad.

[0010] Preferably, brake pad fixing screws are installed inside the brake pad.

[0011] Preferably, a magnetic plate is installed at the bottom of the piston, and a magnetic block is installed at the top of the piston retaining ring.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model uses a spring and a sealing ring in combination. After the air is cut off, the piston automatically returns to its original position through the internal spring pressure. The brake pad will no longer contact the brake disc, avoiding abnormal noise, reducing brake pad wear and increasing service life. In addition, only the sealing ring of the internal piston contacts the cylinder wall, and applying lubricating grease will not cause scratches on the inner wall, which greatly increases the service life of the overall brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the front three-dimensional structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the front part of the utility model;

[0016] Figure 3 For this utility model Figure 2 A is a schematic diagram of the partially enlarged structure of the middle part;

[0017] Figure 4 For this utility model Figure 2 Schematic diagram of the partially enlarged structure of B.

[0018] In the figure: 1. upper cylinder; 2. step; 3. lower cylinder; 4. fixing screw; 5. air inlet; 6. O-ring; 7. air duct; 8. piston; 9. sealing ring; 10. piston retaining ring; 11. brake pad; 12. brake pad fixing screw; 13. spring; 14. magnetic plate; 15. magnetic block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The technical solution of the utility model is further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments of the specification;

[0023] Embodiment 1:

[0024] The present application provides a miniature pneumatic disc brake, comprising an upper cylinder 1; a step 2 is installed at the bottom of one side of the upper cylinder 1, a lower cylinder 3 is installed at the bottom of the step 2, an air passage 7 is penetrated inside the upper cylinder 1, the step 2 and the lower cylinder 3, a piston 8 is installed inside the upper cylinder 1 and the lower cylinder 3, a sealing ring 9 is installed on the outer side of the piston 8, a brake pad 11 is installed on the side close to the piston 8, and a spring 13 is installed on the outer side of the piston 8;

[0025] Specifically, Figure 1 , Figure 2 and Figure 3 As shown, the top of the step 2 is connected to the upper cylinder 1, and the bottom of the step 2 is connected to the lower cylinder 3. By passing gas into the interior of the airway 7, the piston 8 can be prompted to move, thereby prompting the two sets of brake pads 11 to approach each other, thereby achieving the braking effect. When the gas is cut off, the piston 8 automatically returns to its original position through the pressure of the internal spring 13, and the brake pad 11 will no longer contact the brake disc. The piston 8 contacts the cylinder wall through the sealing ring 9, and applying lubricating grease will not cause scratches on the inner wall.

[0026] Furthermore, an air inlet 5 is provided on the side of the upper cylinder 1;

[0027] Specifically, Figure 2 As shown, in order to allow external gas to enter the interior of the upper cylinder 1 and the lower cylinder 3 and realize the movement of the piston 8, the external gas supply equipment is connected through the air inlet 5, so that the gas is transported to the interior of the upper cylinder 1 and the lower cylinder 3 through the air duct 7, prompting the piston 8 to drive the brake pad 11 to move.

[0028] Further, an O-ring 6 is installed on the outside of the air passage 7;

[0029] Specifically, Figure 2As shown, in order to keep the connection of the air channel 7 sealed, the connection between the air channel 7 and the upper cylinder 1 and the lower cylinder 3 can be kept sealed through an O-ring 6 to avoid gas leakage and affect the movement of the piston 8.

[0030] Further, a fixing screw 4 is installed on the top of the upper cylinder 1;

[0031] Specifically, Figure 1 As shown, in order to fix the upper cylinder 1 , the lower cylinder 3 and the step 2 , fixing screws 4 are used to pass through the interior of the upper cylinder 1 , the step 2 and the lower cylinder 3 to fix them.

[0032] Furthermore, a piston retaining ring 10 is installed inside the upper cylinder 1 and the lower cylinder 3 near the top of the brake pad 11;

[0033] Specifically, Figure 2 As shown, in order to limit the brake pad 11, two sets of piston retaining rings 10 are respectively arranged inside the upper cylinder 1 and the lower cylinder 3, and the movement of the brake pad 11 can be limited by the piston retaining rings 10.

[0034] Further, a brake pad fixing screw 12 is installed inside the brake pad 11;

[0035] Specifically, Figure 2 As shown, in order to achieve the fixation between the brake pad 11 and the piston 8, the brake pad 11 can be fixedly installed on one end of the piston 8 by using a brake pad fixing screw 12 to pass through the brake pad 11 and the inside of the piston 8.

[0036] Further, a magnetic plate 14 is installed at the bottom of the piston 8, and a magnetic block 15 is installed at the top of the piston retaining ring 10;

[0037] Specifically, Figure 2 and Figure 4 As shown, in order to prevent the spring 13 from failing and affecting the resetting of the piston 8, the magnetic plate 14 and the magnetic block 15 are connected to a power source so that the same poles repel each other, thereby generating a repulsive force between the magnetic plate 14 and the magnetic block 15, and then causing the piston 8 to reset.

[0038] Working principle: connect the external gas supply equipment through the air inlet 5, so that the gas is transported to the interior of the upper cylinder 1 and the lower cylinder 3 through the air duct 7, and then the piston 8 can be moved to make the two sets of brake pads 11 approach each other and contact the brake disc, thereby achieving the braking effect. When the air is cut off, the piston 8 automatically returns to its original position through the pressure of the internal spring 13, and the brake pad 11 will no longer contact the brake disc.

[0039] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified and replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A miniature pneumatic disc brake, comprising an upper cylinder (1); characterized in that: A step (2) is installed at the bottom of one side of the upper cylinder (1), and a lower cylinder (3) is installed at the bottom of the step (2). An air passage (7) is provided inside the upper cylinder (1), the step (2) and the lower cylinder (3). A piston (8) is installed inside the upper cylinder (1) and the lower cylinder (3), and a sealing ring (9) is installed on the outer side of the piston (8). A brake pad (11) is installed on the side close to the piston (8), and a spring (13) is installed on the outer side of the piston (8).

2. A miniature pneumatic disc brake according to claim 1, characterized in that: An air inlet (5) is provided on the side of the upper cylinder (1).

3. The miniature pneumatic disc brake according to claim 1, characterized in that: An O-type sealing ring (6) is installed on the outer side of the air passage (7).

4. The miniature pneumatic disc brake according to claim 1, characterized in that: A fixing screw (4) is installed on the top of the upper cylinder (1).

5. The miniature pneumatic disc brake according to claim 1, characterized in that: A piston retaining ring (10) is installed inside the upper cylinder (1) and the lower cylinder (3) near the top of the brake pad (11).

6. The miniature pneumatic disc brake according to claim 1, characterized in that: A brake pad fixing screw (12) is installed inside the brake pad (11).

7. The miniature pneumatic disc brake according to claim 5, characterized in that: A magnetic plate (14) is installed at the bottom of the piston (8), and a magnetic block (15) is installed at the top of the piston retaining ring (10).

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