CN2517895Y

CN2517895Y - Double-piston cylinder

Info

Publication number: CN2517895Y
Application number: CN 02212296
Authority: CN
Inventors: 刘亚军; 刘华军; 战荫藩; 武兴亚; 郭庆新; 张晓航; 王世明
Original assignee: 刘亚军
Priority date: 2002-01-19
Filing date: 2002-01-19
Publication date: 2002-10-23
Anticipated expiration: 2012-01-19

Abstract

A double-piston oil cylinder relates to a thrust oil cylinder suited on an axle in the hydraulic technology, and the thrust oil cylinder is mainly provided with a big cylinder body and a small cylinder body, which are oppositely arranged in the axial direction and are provided with a cylinder bottom suited relatively to a cylinder mouth end. The axle sleeve of a big cylinder body (1) is connected with the spline of an outer central shaft (5), the small cylinder body (2) is axially fixed and limited; the inner cavity of the small cylinder body is provided with a piston (3) fixed and connected with the axle sleeve of the big cylinder body to form an oil pressure B cavity; the annular inner cavity of the big cylinder body is provided with a plunger (4) to form an oil pressure A cavity; the end surface of the cylinder mouth of the small cylinder body (2) supports the plunger (4) and gets axially limited. The structure leads to the oil pressure and the thrust force of the oil pressure A cavity and the oil pressure B cavity to be overlapped, and the purposes that the radial size of the small oil cylinder is increased and multiple times thrust forces are attained are realized.

Description

The double-piston oil cylinder

Technical field:

The utility model double-piston oil cylinder relates to the push action cylinder that is sleeved in the hydraulics on the axle.

Background technique:

Hydraulic system executive component line shifting work done at present mainly contains two kinds of oil cylinders, the one, piston oil-cylinder, the 2nd, plunger cylinder, its output work done thrust is determined by cylinder chamber oil pressure and piston area, when the hydraulic system oil pressure is restricted, hosting space does not allow to increase the oil cylinder radial dimension, and will obtain big thrust output the time, single piston oil-cylinder is difficult to satisfy technical requirements.

Summary of the invention:

The purpose of this utility model provides a kind of double-piston oil cylinder, is limiting oil pressure and cylinder diameter under the condition of size, obtains big thrust output.

The technical solution of the utility model is: be provided with large and small two cylinder bodies, axially be oppositely arranged, cylinder bottom is relative, cylinder mouth end suit; The axle sleeve of big cylinder body 1 and outer central shaft 5 splined, inner chamber is the chamber ringwise; Little cylinder body 2 and outer central shaft 5 interference fit, the cylinder bottom axial restraint is spacing; Be provided with the piston 3 that connects firmly with big Boring mill cover in the little cylinder body, form oil pressure B chamber; Be provided with plunger 4 in the big cylinder body annular chamber and form oil pressure A chamber; Cylinder mouth end surface supporting plunger 4 axial limitings of little cylinder body 2.

Adopt the utility model double-piston cylinder structure, the hydraulic system oil pressure produces thrust by the A chamber to big cylinder body 1, and the piston 3 by the B chamber is superimposed upon thrust on the big cylinder body 1, thereby realizes not increasing the purpose that the oil cylinder radial dimension obtains big thrust output.

Description of drawings:

Fig. 1 is the utility model double-piston oil cylinder principle sketch

Among the figure: the big cylinder body of 1-, the little cylinder body of 2-, 3-piston, 4-plunger, the outer central shaft of 5-.

Fig. 2 is applied to the oil cylinder example structure figure that exerts pressure that stepless speed changes devices moves the awl dish for the utility model.

Among the figure: 6-moves the awl dish, 7-plunger, 8-piston, the little cylinder body of 9-, 10-seal ring, the axial jump ring of 11-, 12-Steel ball spline, 13-awl dish axle.

Embodiment:

Present embodiment is the mobile awl dish axial pressure mechanism that the double-piston oil cylinder is applied in automative stepless speed-variation device, because stepless speed changes devices spatial constraints oil cylinder radial dimension is restricted, and mobile awl dish must obtain enough big end thrust, therefore adopts the utility model.

Further specify in conjunction with Fig. 2, mobile awl dish 6 (being equivalent to big cylinder body) axially is oppositely arranged with little cylinder body 9, and cylinder bottom is relative, cylinder mouth end suit; The axle sleeve of mobile awl dish 6 is slidingly fitted on the awl dish axle 13 by Steel ball spline 12, and its inner chamber is the chamber ringwise; Little cylinder body 9 and awl dish axle 13 interference fit, the cylinder bottom axial restraint is spacing; Little inner chamber of cylinder block is provided with a piston 8, and piston is butterfly-shaped annulus, and ring is fixed in by axial jump ring 11 on the axle sleeve of mobile awl dish and forms oil pressure B chamber in the piston 8; Be provided with a plunger 7 in the annular cavity of mobile awl dish 6, form oil pressure A chamber; The cylinder mouth end surface supporting plunger 7 and the axial limiting of little cylinder body; Plunger and piston are equipped with the seal ring 10 with the sealing of cylinder chamber.

Embodiment's working principle is: the hydraulic system oil pressure enters A chamber, B chamber respectively, and the thrust that piston 8 is subjected to is superimposed upon on the mobile awl dish by mobile awl dish axle sleeve, make move awl examine and seize double thrust, thereby satisfy technical requirement on design.

Claims

1. double-piston oil cylinder is characterized in that: be provided with large and small two cylinder bodies, axially be oppositely arranged, cylinder bottom relatively, cylinder mouth end suit; The axle sleeve of big cylinder body (1) and outer central shaft (5) splined, inner chamber is ring cavity; Little cylinder body (2) and outer central shaft (5) interference fit, the cylinder bottom axial restraint is spacing; Be provided with the piston (3) that connects firmly with big Boring mill cover in the little cylinder chamber, form oil pressure B chamber; Be provided with plunger (4) in the big cylinder body annular chamber and form oil pressure A chamber; The cylinder mouth end face of little cylinder body (2) supports plunger (4) and axial limiting.