Piston type hydraulic chuck
A hydraulic chuck, piston type technology, applied in drilling equipment, earthwork drilling, drill pipe, etc., can solve the problem of less moving parts, achieve uniform force, improve working environment, and improve sealing performance.
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[0027] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the protection scope of the present invention.
[0028] As shown in the figure, a piston type hydraulic chuck includes a housing 6. One end of the housing 6 is provided with a chuck body 7 and the other end is provided with an end cover 9; the chuck body 7 is provided with a drill rod clamping device. Clamping device, the clamping device includes a plurality of slips 14 distributed in the circumferential direction of the chuck body 7, a plurality of pistons 12 for pressing the slips 14 and arranged between adjacent slips 14 for opening In the spring group 13 of the slip 14, the piston 12 and the slip 14 are arranged in one-to-one correspondence. A high-pressure oil chamber M is provided between the chuck body 7 and the housing...
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