CN112096691A - A child-mother double-stroke cylinder with a guide rod - Google Patents

Abstract

The invention provides a dual-stroke cylinder with a guide rod, which relates to the technical field of cylinders, and includes a master cylinder, a master piston and a master piston rod. The master piston is movably arranged in the master cylinder, and the master cylinder The inner space is isolated into two stroke cavities, and the end of the female piston rod is fixed on the female piston; the female piston rod is provided with a cavity, and a sub-piston and a sub-piston rod are movably arranged in the cavity, and the sub-piston The cavity is isolated into two stroke cavities, the end of the sub-piston rod is fixed on the sub-piston, and the front end of the sub-piston rod extends out of the cavity. The invention provides a dual-stroke cylinder with a guide rod, which realizes double-stroke multiplex by opening a cavity in the mother piston rod, and using the mother piston rod as the cylinder block of the sub-cylinder and the air circuit components of the sub-cylinder. It can be installed in a small space in the axial direction, reducing the installation space of the double-stroke cylinder, and realizing the maximum driving force in the limited space.

Description

A child-mother double-stroke cylinder with a guide rod

technical field

The invention relates to the technical field of cylinders, in particular to a dual-stroke cylinder with guide rods.

Background technique

In traditional hardware, machining, CNC automation, mold processing and other industries, air cylinders or hydraulic cylinders are often used for positioning or lifting and demoulding. Cylinders are basically standardized components, with general profile dimensions, large installation space, and limited driving force. The driving force of the hydraulic cylinder is large, but it needs to be used with a hydraulic pump and a hydraulic circuit, and the volume is larger; and the operating frequency of the hydraulic cylinder cannot be too fast, and the efficiency is limited.

Air cylinders and hydraulic cylinders have the following common shortcomings: the space required to achieve double-stroke double-station axial installation is 2-3 times that of single-station installation space, which cannot meet the needs of customers to achieve double-stroke double-station axial installation in a small space. Install. And the guidance accuracy is not high, generally need to add a guide column.

SUMMARY OF THE INVENTION

For this reason, the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, thereby providing a dual-stroke cylinder with a guide rod, by opening a cavity in the mother piston rod, and using the mother piston rod as the sub-cylinder The cylinder block and sub-cylinder air circuit components realize the double-stroke multi-station axial small space installation, reduce the installation space of the double-stroke cylinder, and achieve the largest possible driving force in a limited space.

In order to achieve the above purpose, the present invention provides a dual-stroke cylinder with a guide rod, including a master cylinder, a master piston and a master piston rod, wherein the master piston is movably arranged in the master cylinder, and the master cylinder can be The inner space is isolated into two stroke cavities, and the end of the female piston rod is fixed on the female piston; the female piston rod is provided with a cavity, and a sub-piston and a sub-piston rod are movably arranged in the cavity, and the sub-piston The cavity is isolated into two stroke cavities, the end of the sub-piston rod is fixed on the sub-piston, and the front end of the sub-piston rod extends out of the cavity.

Further, the front end of the mother cylinder is provided with a female front cover, and the rear end of the mother cylinder is provided with a female rear cover.

Further, the front end of the female piston rod is provided with a sub front cover for closing the cavity.

Further, the front end of the sub-piston rod protruding from the outside of the cavity is provided with a working head.

Further, at least two guide rods pass through the edge of the mother cylinder in the axial direction, the guide rods are evenly distributed in the circumferential direction of the edge of the mother cylinder, and the front ends of the guide rods are connected with the working head.

Further, four guide rods are provided, and the four guide rods are evenly distributed along the circumference of the edge of the mother cylinder.

Further, two air intake holes A1 and A2 are opened on the mother cylinder block, and two air intake holes B1 and B2 are opened on the mother piston rod, and A1 and A2 are controlled by the same solenoid valve, B1 and A2 are controlled by the same solenoid valve. B2 is controlled by the same solenoid valve.

Further, the precision of the guide rod is a g6 tolerance level.

The invention provides a dual-stroke cylinder with a guide rod. A master cylinder, a master piston and a master piston rod form a master cylinder, and a master piston rod, a slave piston and a slave piston rod form a slave cylinder. The mother cylinder drives the mother piston rod for one stroke, and the sub cylinder drives the sub piston rod for one stroke. In this embodiment, by opening a cavity in the mother piston rod, and using the mother piston rod as the cylinder block of the sub-cylinder and the air circuit components of the sub-cylinder, the double-stroke multi-station axial small space installation is realized, and the double-stroke cylinder is reduced. The installation space, in the limited space, to achieve the largest possible driving force. The structural design of the mother and daughter cylinders eliminates the problem of requiring two cylinders or a simple double-stroke cylinder to occupy the design space, and the axial space is reduced to about 50%. The axial space of the product is compressed to the extreme, ensuring the maximum energy efficiency of aerodynamic products in a specific space, and the driving space area of the same cross-section is increased by 20%.

Description of drawings

In order to illustrate the technical solutions of the specific embodiments of the present invention more clearly, the invention will be further described in detail below according to the specific embodiments of the present invention and in conjunction with the accompanying drawings.

Fig. 1 is the overall structure sectional view of the present invention;

Fig. 2 is the structure diagram of guide rod and mother cylinder in the present invention;

Fig. 3 is a double-stroke working position diagram of the sub-piston rod in the present invention.

The reference numerals in the figures are explained as follows.

110, mother cylinder; 120, female piston; 130, female piston rod; 140, female front cover; 150, female rear cover; 200, cavity; 310, child piston; 320, child piston rod; 330, child front cover; 410, working head; 420, guide rod; 430, precision bearing.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "front", "upper", "lower", "left", "right", "vertical", "horizontal", etc. is based on The orientation or positional relationship shown in the drawings is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as Limitations of the present invention.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As shown in FIG. 1 to FIG. 3 , a dual-stroke cylinder with a guide rod includes a master cylinder 110 , a master piston 120 and a master piston rod 130 . The inside of the parent cylinder 110 is hollow, the parent piston 120 is arranged in the parent cylinder 110, the parent piston 120 can move in the axial direction in the parent cylinder 110, and the parent piston 120 isolates the inside of the parent cylinder 110 into two independent As for the stroke chamber, during the movement of the female piston 120, the sizes of the two stroke chambers change moment by moment. The end of the female piston rod 130 is fixed on the surface of the female piston 120 , and the female piston rod 130 moves along the axis direction of the female piston 120 under the driving of the female piston 120 .

A cavity 200 is opened in the female piston rod 130 along its axis direction, and a sub-piston 310 and a sub-piston rod 320 are arranged in the cavity 200. The cavity 200 is isolated into two independent stroke cavities. During the movement of the sub-piston 310, the sizes of the two stroke cavities change moment by moment. The end of the sub-piston rod 320 is fixed on the surface of the sub-piston 310 , and the sub-piston rod 320 moves along the axis direction of the cavity 200 under the driving of the sub-piston 310 .

The master cylinder 110, the master piston 120 and the master piston rod 130 form a master cylinder, and the master piston rod 130, the sub-piston 310 and the sub-piston rod 320 form a sub-cylinder. The master cylinder drives the master piston rod 130 for one stroke, and the sub cylinder drives the sub piston rod 320 for one stroke. In this embodiment, by opening the cavity 200 in the mother piston rod 130, and using the mother piston rod 130 as the cylinder block of the sub-cylinder and the air circuit components of the sub-cylinder, the double-stroke multi-position axial installation in a small space is realized, and the reduction of The installation space of the double-stroke cylinder can achieve the largest possible driving force in a limited space. The structural design of the mother and daughter cylinders eliminates the problem of requiring two cylinders or a simple double-stroke cylinder to occupy the design space, and the axial space is reduced to about 50%. The axial space of the product is compressed to the extreme, ensuring the maximum energy efficiency of aerodynamic products in a specific space, and the driving space area of the same cross-section is increased by 20%.

The front end of the mother cylinder 110 is provided with a female front cover 140 , and the rear end of the mother cylinder 110 is provided with a female rear cover 150 . The front end of the female piston rod 130 extends out from the front end of the mother cylinder 110 , and the female front cover 140 is arranged at the position where the female piston rod 130 extends out of the mother cylinder 110 to seal the mother cylinder 110 and ensure the mother piston The rod 130 can move along the axis of the parent cylinder 110 . The female rear cover 150 is disposed at the other end of the mother cylinder 110 opposite to the female front cover 140 , and is also used for sealing the mother cylinder 110 .

The front end of the female piston rod 130 is provided with a sub-front cover 330, the sub-piston rod 320 extends from the front end of the cavity 200, and the sub-front cover 330 is arranged at the front of the cavity 200 for sealing the female piston rod 130, The rear end of the cavity 200 is the female piston 120 , and the female piston 120 is used as a sub-rear cover of the cavity 200 to seal the cavity 200 .

The front end of the sub-piston rod 320 protruding from the outside of the cavity 200 is provided with a working head 410 . The front end of the sub-piston rod 320 is the force application point of the cylinder provided in this embodiment to the outside world, and the arrangement of the working head 410 is beneficial to increase the force application area of the cylinder.

At least two guide rods 420 pass through the edge of the mother cylinder 110 in the axial direction, and the guide rods 420 are evenly distributed in the circumferential direction of the edge of the mother cylinder 110. The front end of the guide rod 420 is connected with the working head 410, and the guide rod 420 is The main cylinder 110 is slidably connected, and the guide rod 420 is fixedly connected with the working head 410 . When the cylinder drives the sub-piston rod 320 to move back and forth, the working head 410 drives the guide rod 420 to move, and the setting of the guide rod 420 realizes high-precision full-stroke guidance. In addition, the accuracy of the guide rod 420 is a g6 tolerance level, which further improves the guide accuracy of the guide rod 420, thereby improving the processing accuracy of the product.

Further, in this embodiment, four guide rods 420 are provided, and the four guide rods 420 are evenly distributed along the circumference of the edge of the mother cylinder 110 . The four provided guide rods 420 can improve the guiding precision, and precision bearings 430 are provided at the connection between the guide rods 420 and the mother cylinder 110 to reduce frictional force.

In this embodiment, the kinematic joints of each component are provided with conventional standard accessories such as seals and buffer pads that are standard with the cylinder, which will not be described in detail here.

Two air intake holes A1 and A2 are opened on the main cylinder block 110, and the air intake holes A1 and A2 are controlled by the same solenoid valve. A2 intake, the female piston rod 130 retracts inward. The main piston rod 130 is provided with two air intake holes B1 and B2, and B1 and B2 are controlled by the same solenoid valve, B1 is inhaled, the sub-piston rod 320 is driven out by the sub-piston 310, and B2 is inhaled. , the sub-piston rod 320 retracts inward. Two solenoid valves control the inlet and outlet of the four air intake holes A1, A2, B1, and B2, and realize different control logics through the pressure difference and the control sequence.

Take a specific control logic as an example:

As shown in Figure 3, the cylinder is in station 1 in the natural state;

A1 is inhaled, and the female piston rod 130 is driven by the female piston 120 to move to the station 2;

B1 is inhaled, and the sub-piston rod 320 is driven by the sub-piston 310 to move to the station 3 to realize a double stroke, so that the cylinder is in the maximum stroke state;

B1 is cut off, B2 is taken in, the sub-piston rod 320 contracts, and moves back to station 2;

A2 is inhaled, the female piston rod 130 contracts, moves back to station 1, and completes a complete double-stroke action.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (8)

1. a child-mother double-stroke cylinder with guide rod, is characterized in that, comprises mother cylinder, female piston and female piston rod, and described female piston is movably arranged in the mother cylinder, can isolate the inner space of the mother cylinder into two stroke chambers, the end of the female piston rod is fixed on the female piston; the female piston rod is provided with a cavity, and a sub-piston and a sub-piston rod are movably arranged in the cavity, and the sub-piston connects the cavity It is isolated into two stroke cavities, the end of the sub-piston rod is fixed on the sub-piston, and the front end of the sub-piston rod protrudes out of the cavity. 2 . The dual-stroke cylinder with guide rods according to claim 1 , wherein the front end of the mother cylinder is provided with a female front cover, and the rear end of the mother cylinder is provided with a female rear cover. 3 . 3 . The dual-stroke cylinder with a guide rod, wherein the front end of the female piston rod is provided with a front cover for closing the cavity. 4 . 4 . The dual-stroke cylinder with a guide rod of the child and the mother according to claim 3 , wherein the front end of the child piston rod protruding from the outside of the cavity is provided with a working head. 5 . 5 . The dual-stroke cylinder with guide rods according to claim 4 , wherein the edge of the mother cylinder is axially provided with at least two guide rods, and the guide rods are located in the mother cylinder. The edge of the cylinder body is evenly distributed in the circumferential direction, and the front end of the guide rod is connected with the working head. 6 . The dual-stroke cylinder with guide rods according to claim 5 , wherein four guide rods are provided, and the four guide rods are evenly distributed along the circumference of the edge of the mother cylinder. 7 . 7. A kind of double-stroke cylinder with guide rod according to claim 1, characterized in that, two air intake holes A1 and A2 are opened on the mother cylinder, and two air intake holes A1 and A2 are opened on the mother piston rod, and the mother piston rod is provided with The two intake holes B1 and B2, and A1 and A2 are controlled by the same solenoid valve, and B1 and B2 are controlled by the same solenoid valve. 8 . The dual-stroke cylinder with a guide rod according to claim 6 , wherein the precision of the guide rod is a G6 tolerance level. 9 .

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