Brake cylinder piston grabber

Abstract

The invention provides a wheel type engineering equipment caliper brake cylinder piston grabber. A two-way oil cylinder is fixedly connected to a supporting frame through threads. The bottom end of a piston rod of the two-way oil cylinder is connected with an automatic expansion jaw through threads, the piston rod of the two-way oil cylinder is sleeved with a reverse external tension conical spring, the upper end of the conical spring is fixed to the supporting frame, and the lower end of the conical spring props against the automatic expansion jaw; the two-way oil cylinder is connected to a hydraulic booster pump through a double-loop high-pressure oil pipe, and the hydraulic booster pump is fixed to a foldable steel plate base through bolts. When a knob of the hydraulic booster pump is turned to a oil-feeding gear, a crank of the hydraulic booster pump is manually pressed, oil enters a rod cavity of the two-way oil cylinder, the piston rod retracts, the lower end of the conical spring props against the automatic expansion jaw so that the automatic expansion jaw can be opened, a brake cylinder piston inner cavity annular groove is grasped, and a brake cylinder piston is taken out by retraction pull force of the piston rod of the oil cylinder. When the knob of the hydraulic booster pump is turned to a oil-returning gear, the crank of the hydraulic booster pump is manually pressed, oil enters a rodless cavity of the two-way oil cylinder, the piston rod of the oil cylinder stretches, the tail end of the reverse external tension conical spring looses the automatic expansion jaw so that the automatic expansion jaw can retract and return to the original position, the brake cylinder piston is disengaged from the automatic expansion jaw, and the brake cylinder piston is convenient to maintain or replace.

Description

Technical field [0001] The invention relates to a device for taking out a cylinder piston of a caliper brake cylinder of wheeled engineering equipment, in particular to a hydraulic power-assisted grabber. Background technique [0002] At present, the known brake cylinder piston puller structure is assembled from a main screw, a grabbing head, and a support frame. Insert the grabbing head into the inner cavity of the sub-pump piston, manually adjust the claws of the grabbing head to hook the ring groove in the inner cavity of the piston, and then turn the main screw to take out the piston to complete the work. However, when manually adjusting the claws of the grabbing head, the action is complicated and laborious and cannot be guaranteed to be completely centered at one time, which causes the piston to deviate to the side and is difficult to take out; the support frame is a fixed support frame and cannot be applied to working surfaces of different shapes; When the screw is u...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing brake cylinder piston puller, which are complicated and laborious to operate, cannot ensure complete centering, and have a narrow application range, the present invention provides a hydraulically assisted brake cylinder piston grabber. The pump piston grabber is not only easy to operate and labor-saving, but also ensures automatic centering, and can be applied to brake cylinder pistons of different models, different inner diameters, and different working surfaces

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