CN105221520A - Order oil cylinder - Google Patents

Abstract

The invention discloses a sequential oil cylinder which can realize sequential actions according to the design requirements when the oil cylinders are used in series; the adopted technical scheme is: a sequential oil cylinder, the front cylinder head is arranged at one end of the cylinder body, and a piston is arranged at one end of the multi-layer piston rod. The other end of the multi-layer piston rod is provided with a connector, the core rod is hollow, the core rod is set in the multi-layer piston rod, and the outer side of the cylinder is provided with oil port A and oil port B for hydraulic oil in and out. There are oil port A1 and oil port B1 for connecting the oil inlet and outlet of the next stage oil cylinder. One end of the core rod is connected with the oil port A, and the other end of the core rod is provided with an oil outlet hole. When the multi-layer piston rod is not extended, The oil outlet hole on the core rod is closed, and when the multi-layer piston rod is stretched out, the oil outlet hole on the core rod communicates with the A1 port on the connector, and the oil port B communicates with the oil port B1 on the connector head; the present invention can be widely used Used in the field of hydraulic cylinders.

Description

sequential cylinder

technical field

The invention relates to a sequential oil cylinder, which belongs to the technical field of hydraulic oil cylinders.

Background technique

When ordinary engineering cylinders are used in series, due to the influence of friction or load, the extension and contraction of each cylinder is out of order, that is, which cylinder receives the least friction or load will start to run first. The sequential oil cylinder can realize sequential action according to the design requirements, and is not affected by friction and load. For example: in the telescopic action of the telescopic arm on the truck-mounted crane, ordinary engineering cylinders cannot meet the requirements of sequential action; while the sequential cylinder is not affected by friction and load, so that the telescopic arm expands and contracts sequentially according to the design requirements.

Contents of the invention

The invention overcomes the shortcomings of the prior art and provides a sequential oil cylinder which can realize sequential actions according to design requirements when the oil cylinders are used in series.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a sequential oil cylinder, comprising a cylinder body, a multi-layer piston rod, a piston, a front cylinder cover and a core rod; the front cylinder cover is arranged at one end of the cylinder body, and Cooperate to form a closed inner cavity, the multi-layer piston rod and the piston are both arranged in the inner cavity of the cylinder body, one end of the multi-layer piston rod is provided with a piston, and the other end of the multi-layer piston rod is provided with a connector , the piston divides the inner cavity of the cylinder into a rod cavity and a rodless cavity, the core rod is hollow, the core rod is arranged in a multilayer piston rod, and the outside of the cylinder is provided with a hydraulic Oil port A and oil port B for oil in and out. The connector is provided with oil port A1 and oil port B1 for connecting the oil inlet and outlet ports of the next stage of oil cylinder. One end of the core rod communicates with oil port A. The other end of the core rod is provided with an oil outlet hole. When the multi-layer piston rod is not extended, the oil outlet hole on the core rod is closed. When the multi-layer piston rod is extended, the oil outlet hole on the core rod is closed. The oil hole communicates with port A1 on the connector, and the oil port B communicates with port B1 on the connector.

The connecting head is provided with a stroke valve, and the stroke valve connects the rodless chamber of the secondary oil cylinder with the core rod to return oil for the recovery of the oil cylinder.

A one-way valve is arranged on the cylinder block, and the one-way valve is used for adjusting the oil pressure of the oil port A.

Compared with the prior art, the present invention has the beneficial effects that: the present invention adopts a special piston rod to make the oil cylinders realize the sequential action of the mechanism in series operation. In addition, the present invention can be realized in a smaller oil cylinder (bore diameter of the oil cylinder is more than or equal to 80mm).

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the working oil circuit of the present invention.

In the figure: 1 is the cylinder body, 2 is the multi-layer piston rod, 3 is the piston, 4 is the front cylinder cover, 5 is the one-way valve, 6 is the core rod, 7 is the stroke valve, and 8 is the connector.

detailed description

As shown in Figures 1 and 2, the sequential oil cylinder of the present invention includes a cylinder block 1, a multilayer piston rod 2, a piston 3, a front cylinder cover 4 and a core rod 6; the front cylinder cover 4 is arranged at one end of the cylinder body 1 , cooperate with the cylinder body 1 to form a closed inner cavity, the multi-layer piston rod 2 and the piston 3 are all arranged in the inner cavity of the cylinder body 1, one end of the multi-layer piston rod 2 is provided with a piston 3, the multi-layer piston rod 2 is provided with a piston 3, and the multi-layer piston rod 2 is provided with a piston 3. The other end of the layer piston rod 2 is provided with a connector 8, the piston 3 divides the inner chamber of the cylinder 1 into a rod chamber and a rodless chamber, the core rod 6 is hollow, and the core rod 6 is arranged on In the multi-layer piston rod 2, the outer side of the cylinder 1 is provided with an oil port A and an oil port B for the entry and exit of hydraulic oil, and the connection head 8 is provided with an oil port A1 for connecting the oil inlet and outlet ports of the next stage of the cylinder and oil port B1, one end of the core rod 6 communicates with oil port A, the other end of the core rod 6 is provided with an oil outlet hole, when the multi-layer piston rod 2 is not extended, the core rod 6 When the multi-layer piston rod 2 is stretched out, the oil outlet hole on the core rod 6 communicates with the A1 port on the connector 8, and the oil port B and the oil port on the connector 8 B1 is connected.

The connecting head 8 is provided with a stroke valve 7, and the stroke valve 7 connects the rodless chamber of the secondary oil cylinder with the core rod 6 to return oil for the retraction of the oil cylinder.

The cylinder block 1 is provided with a one-way valve 5, and the one-way valve 5 is used for adjusting the oil pressure of the oil port A.

The working process of the present invention: when the multi-layer piston rod 2 of the oil cylinder in the present invention is stretched out, the oil port A enters the oil, and the oil port B returns the oil, and the multi-layer piston rod 2 of the oil cylinder is fully extended; at this time, the oil port A passes through the core The oil outlet hole on the rod 6 communicates with the oil port A1, and connects with the oil port A of the next-stage oil cylinder through the oil port A1, and the next-stage oil cylinder performs an extension action; when the multi-layer piston rod 2 of the oil cylinder is recovered, the oil port B enters The oil flows into the rod chamber of the final cylinder through the oil port B1; at this time, the hydraulic oil in the rodless chamber returns to the oil through the core rod 6 of each cylinder; when all the multi-layer piston rods 2 of the final cylinder are retracted, they are opened by the mechanism The stroke valve 7 of the secondary oil cylinder, the hydraulic oil in the rodless cavity of the secondary oil cylinder returns to the oil through the core rod 6; each oil cylinder is recovered in this order.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Within the scope of knowledge of those of ordinary skill in the art, various modifications can be made without departing from the gist of the present invention. kind of change.

Claims (3)

1. order oil cylinder, is characterized in that: comprise cylinder body (1), multilayer piston rod (2), piston (3), front end housing (4) and core bar (6), described front end housing (4) is arranged on one end of cylinder body (1), the inner chamber being formed and close is coordinated with cylinder body (1), described multilayer piston rod (2) and piston (3) are all arranged in the inner chamber of cylinder body (1), one end of described multilayer piston rod (2) is provided with piston (3), the other end of described multilayer piston rod (2) is provided with connecting head (8), the inner chamber of cylinder body (1) is separated into rod chamber and rodless cavity by described piston (3), described core bar (6) is in hollow shape, described core bar (6) is arranged in multilayer piston rod (2), the arranged outside of described cylinder body (1) has the hydraulic fluid port A and hydraulic fluid port B that pass in and out for hydraulic oil, described connecting head (8) is provided with the hydraulic fluid port A1 for connecting next stage oil cylinder oil inlet and outlet and hydraulic fluid port B1, one end of described core bar (6) is communicated with hydraulic fluid port A, the other end of described core bar (6) is provided with oil outlet, when described multilayer piston rod (2) is not stretched out, oil outlet on described core bar (6) is closed, when described multilayer piston rod (2) is stretched out, oil outlet on described core bar (6) is communicated with the A1 mouth on connecting head (8), described hydraulic fluid port B is communicated with the hydraulic fluid port B1 on connecting head (8).

2. order oil cylinder according to claim 1, is characterized in that: described connecting head (8) is provided with stroke valve (7), and the rodless cavity of secondary oil cylinder is communicated with core bar (6) by described stroke valve (7), carries out oil return, for the withdrawal of oil cylinder.

3. order oil cylinder according to claim 1 and 2, is characterized in that: described cylinder body (1) is provided with one-way valve (5), and described one-way valve (5) is for regulating the oil pressure of hydraulic fluid port A.