1results about How to "Easy and labor-saving installation" patented technology

The application discloses a gear grinding fixture, which comprises a body, a base, a tensioning sleeve, a pull rod and a piston, wherein the body is detachably connected with the base, and a piston cavity is formed in the base; a bottom plate is arranged on the lower end cover of the base, an annular positioning boss is arranged on the upper end surface of the bottom plate, the positioning boss extends into the lower end of the piston cavity, and a first sealing ring is arranged between the outer circumferential surface of the positioning boss and the inner circumferential surface of the piston cavity; the piston comprises a small-diameter upper section, a large-diameter middle section and a small-diameter lower section which are sequentially connected in sequence; the outer circumferential surfaces of the small-diameter upper section and the large-diameter middle section are respectively provided with second and third sealing rings between the outer circumferential surfaces and the inner circumferential surface of the piston cavity; the small-diameter lower section extends into the positioning boss downwards, and a fourth sealing ring is arranged between the circumferential surfaces of the small-diameter lower section and the positioning boss; a positioning hole is concavely arranged on the lower end surface of the small-diameter lower section, a positioning column is detachably connected on the bottom plate in correspondence, the positioning column extends into the positioning hole upwards to form an up-and-down sliding fit, and a first positioning pin is arranged between the large-diameter middle section and the base. The structure has a good piston positioning effect and is stable and reliable in movement.