A pneumatic hoist clutch brake
A technology for brakes and hoists, applied in the direction of hoisting devices, etc., can solve the problems of large wear of the brake hammer and end cover, brake failure, limiting the use effect of centrifugal brakes, etc., and achieve the effect of avoiding direct friction
Inactive Publication Date: 2016-09-21
SOUTH CHINA UNIV OF TECH +1
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Problems solved by technology
However, the centrifugal brake of this structure has a large wear of the brake hammer and the end cover, and it is easy to cause braking failure due to the wear of the brake hammer. Moreover, the existing centrifugal brake can only realize the braking of the reel rotating in one direction. , limiting the effect of centrifugal brakes
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[0015] refer to figure 1 , figure 2 , the present invention provides an air hoist clutch brake, including a nut 2 engaged with a threaded screw 10 of the air hoist, a brake disc 3 set on the nut 2 and rotating with the reel of the air hoist, and a brake disc 3 arranged on the nut 2 The centrifugal hammer 4 on the outside of the circumferential surface of the nut 2 is provided with several slots 20 on the circumferential surface of the nut 2. The upper end of the centrifugal hammer 4 is connected with a tension spring 5 that makes the centrifugal hammer 4 close to the outer surface of the nut 2. The centrifugal hammer 4 The lower end is provided with a stopper 41 that can be embedded in the slot 20 , and the centrifugal hammer 4 is provided with a pin 42 hinged with the brake disc 3 on the side of the middle part that is biased towards the stopper 41 .
[0016] When the pneumatic hoist clutch brake is in use, when the angular velocity of the brake disc 3 rotating with the ree...
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The invention discloses an air hoist clutch brake, which is used in the field of air hoists, comprising a nut engaged with a threaded lead screw of an air hoist, a brake disc sleeved on the nut and rotating together with a reel of the air hoist, and a brake disc arranged on the nut. The centrifugal hammer on the outside of the outer surface of the nut has several slots on the outer surface of the nut. The upper end of the centrifugal hammer is connected to the front end of the brake disc with a tension spring that makes the centrifugal hammer close to the outer surface of the nut. The centrifugal hammer The lower end of the hammer is provided with a block that can be embedded in the slot, and a pin shaft hinged with the brake disc is provided on the side of the centrifugal hammer that is biased towards the block in the middle. When in use, when the angular velocity of the brake disc reaches or exceeds the critical speed, the stopper is inserted into the slot, so that the nut rotates with the brake disc and moves laterally along the threaded screw and against the end cover, finally achieving braking. In the present invention, the block is inserted into the slot through the centrifugal hammer, so as to avoid the direct friction between the centrifugal hammer and the end cover, and realize bidirectional rotation braking.
Description
technical field [0001] The invention is used in the field of pneumatic hoists, and in particular relates to a clutch brake for pneumatic hoists. Background technique [0002] Pneumatic hoists widely used at this stage are mainly divided into two types: vane type and piston type. The vane pneumatic hoist directly uses gas to drive the vane to rotate to achieve the lifting of the load. The blade type pneumatic hoist is mainly used in heavy load occasions, it has high working efficiency and strong load capacity. However, compared with the piston-type pneumatic hoist, under the same load capacity, the blade-type pneumatic hoist is relatively heavy and has a complicated braking principle. Moreover, the blade type pneumatic hoist is noisy. Piston-type pneumatic hoist is to pass gas into the cavity formed by the piston, back cover and cylinder, the gas pushes the piston to move in a straight line, the reel meshes with the ball screw, and the screw screw is fixed. Pushed by the ...
Claims
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IPC IPC(8): B66D5/04
Inventor 屈盛官李文龙李小强胡欣钧张行斌
Owner SOUTH CHINA UNIV OF TECH