一种常闭式制动器

Abstract

本申请属于制动器的技术领域，公开了一种常闭式制动器，其包括壳体、空心轴、摩擦片、制动片、碟簧、活塞端板、第一活塞以及第二活塞，空心轴的外周面设置有外齿条，摩擦片的内周面设置有与外齿条啮合的内齿牙，第一活塞靠近制动片的一侧与壳体共同形成了第一油腔，第一活塞连接于活塞端板，第二活塞背离制动片的一侧与壳体共同形成了第二油腔，以实现对碟簧弹性力的调节，进而一方面保证了制动片以及摩擦片磨损后常闭式制动器的制动效果，以延长常闭式制动器的使用寿命，另一方面使得常闭式制动器能够根据所需制动力的大小对碟簧进行调节，以满足不同运动部件的使用需求，以增加了常闭式制动器的灵活性。

Claims

1. A normally closed brake, characterized by Includes a housing (1), a hollow shaft (2) disposed inside the housing (1), a friction plate (3) disposed inside the housing (1) and sleeved on the hollow shaft (2), a brake plate (4) disposed inside the housing (1) and sleeved on the hollow shaft (2), a disc spring (5) disposed inside the housing (1), a piston end plate (6) located between the disc spring (5) and the brake plate (4), a first piston (7) located on the side of the piston end plate (6) away from the brake plate (4), and a second piston (8) located on the side of the disc spring (5) away from the piston end plate (6). An external rack is provided on the outer peripheral surface, and an internal tooth is provided on the inner peripheral surface of the friction pad (3) to mesh with the external rack. The first piston (7) and the housing (1) together form a first oil chamber (71) on the side close to the brake pad (4). The first piston (7) is connected to the piston end plate (6). The second piston (8) and the housing (1) together form a second oil chamber (81) on the side away from the brake pad (4). The housing (1) is provided with a first oil inlet channel (711) communicating with the first oil chamber (71) and a second oil inlet channel communicating with the second oil chamber (81).

2. A normally closed brake according to claim 1, wherein The housing (1) is provided with a baffle (131) sleeved on the outside of the hollow shaft (2). The first piston (7) has a guide edge (72) sleeved on the outside of the baffle (131). The housing (1), the baffle (131), the guide edge (72) and the first piston (7) together form the first oil chamber (71). The guide edge (72) is connected to the piston end plate (6).

3. A normally closed brake according to claim 2, wherein The housing (1) is provided with a sealing ring (132) sleeved on the outside of the hollow shaft (2). The baffle (131) is connected to the sealing ring (132). The first piston (7) is sleeved on the outside of the sealing ring (132). A first sealing ring (73) is provided between the sealing ring (132) and the first piston (7) and between the baffle (131) and the guide edge (72).

4. A normally closed brake according to claim 1, wherein The housing (1) has a receiving groove inside, the second piston (8) extends into the receiving groove and together with the receiving groove forms the second oil chamber (81), the second piston (8) is provided with a push plate (82) located outside the receiving groove, and the push plate (82) contacts the disc spring (5).

5. A normally closed brake according to claim 4, wherein A second sealing ring (83) is provided between the inner circumferential surface of the second piston (8) and the groove wall of the receiving groove, and between the outer circumferential surface of the second piston (8) and the groove wall of the receiving groove.

6. A normally closed brake according to any one of claims 1-5, characterized in that The housing (1) is provided with a displacement sensor (9) extending into the housing (1), and the detection end of the displacement sensor (9) faces the brake pad (4).

7. A normally closed brake according to any one of claims 1-5, characterized in that The housing (1) is provided with a pressure sensor (91), and the detection end of the pressure sensor (91) is located in the second oil chamber (81).

8. A normally closed brake according to any one of claims 1-5, characterized in that The brake pads (4) are provided in multiple ways and are respectively located on opposite sides of the friction pads (3). The housing (1) is provided with a guide rod (41) that passes through the multiple brake pads (4). A spring (411) is sleeved on the guide rod (41) and located between two adjacent brake pads (4).

9. A normally closed brake according to any one of claims 1-5, characterized in that The housing (1) includes an internal gear ring (11), a first end cap (12) located at one end of the internal gear ring (11), a second end cap (13) located at the other end of the internal gear ring (11), a first sealing cap (14) located on the side of the first end cap (12) away from the internal gear ring (11), and a second sealing cap (15) located on the side of the second end cap (13) away from the internal gear ring (11). The brake pad (4), the friction pad (3), and the piston end plate (6) are all located inside the internal gear ring (11), and the outer peripheral surface of the brake pad (4) is provided with external teeth that mesh with the internal gear ring (11).

10. A normally closed brake according to claim 9, wherein Both the first end cap (12) and the second end cap (13) are provided with bearings (121), which are sleeved on the outside of the hollow shaft (2).

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