CN111795034A - a gas actuator - Google Patents

Abstract

The invention relates to a gas actuator, which comprises a cylinder tube and a piston arranged in the cylinder tube. A hollow piston rod is sealed and fixed on the lower side of the piston, and the lower end of the piston rod extends out of the cylinder tube and is sealed and fixed with a blocking plate. A gas generator is arranged in the gas generator; the gas generator includes a container, gunpowder and an igniter arranged in the container, the container is a tubular structure with an upper end closed, the lower end of the container is fixed on the blocking plate, and a plurality of ventilation holes are arranged on the peripheral wall of the container , the igniter is located on the lower side of the gunpowder, and the igniter is connected with a wire drawn from the blocking plate; the piston is provided with a discharge hole connecting the inner cavity of the cylinder barrel and the inner cavity of the piston rod. It has the advantages of simple structure, low cost, high integration, small volume and light weight, can meet the application requirements of small space, large load and single use, and can effectively reduce the cost.

Description

a gas actuator

technical field

The invention relates to a gas propulsion device, in particular to an actuator based on high-pressure gas for work.

Background technique

The cylinder is a pneumatic component that uses the principle of pneumatic transmission, and the high-pressure gas charged into the cylinder pushes the piston to move along the cylinder, thereby converting the pressure energy of the high-pressure gas into mechanical energy. Cylinders are divided into single-acting cylinders, double-acting cylinders, impact cylinders, rodless cylinders and other types, which are widely used in various fields. Form the air supply system. As a type of cylinder, the impact cylinder requires high air source pressure and large air flow, resulting in a large volume of the entire system and complicated control. For application scenarios with small space and large loads, it is difficult to meet the use requirements; And for the high-value application scenarios of single use, based on the configuration mode and application mode of the existing cylinder gas supply system, there is a problem of high use cost.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a gas actuator, which has the advantages of simple structure, low cost, high integration, small volume and light weight, which can meet the application requirements of small space, large load and single use, and can Effectively reduce costs.

In order to solve the above problems existing in the prior art, the present invention provides a gas actuator, comprising a cylinder barrel and a piston arranged in the cylinder barrel, a hollow piston rod is sealed and fixed on the lower side of the piston, and the piston is The lower end of the rod protrudes out of the cylinder and is sealed and fixed with a blocking plate, and a gas generator is arranged in the piston rod; the gas generator includes a container, gunpowder and an igniter arranged in the container, and the container is a tubular structure with a closed upper end , the lower end of the container is fixed on the blocking plate, the peripheral wall of the container is provided with a plurality of ventilation holes, the igniter is located on the lower side of the gunpowder, and the igniter is connected with a wire drawn from the blocking plate; the piston is provided with a communication Relief holes in the inner cavity of the cylinder barrel and the inner cavity of the piston rod.

Further, the present invention provides a gas actuator, wherein the lead-out end of the electric wire is connected with an electrical connector, and the electrical connector is fixed on one side of the blocking plate.

Further, the present invention provides a gas-fired actuator, wherein the piston rod passes through the bottom wall of the cylinder barrel to make the two slidably fit together, and the peripheral wall of the lower end of the cylinder barrel is provided with an exhaust hole.

Further, the present invention provides a gas actuator, wherein an upper lug is fixed on the upper side of the top wall of the cylinder tube, and a lower lug is fixed on the lower side of the blocking plate.

Further, the present invention provides a gas actuator, wherein the container, the piston rod and the piston are arranged coaxially, and the relief hole is arranged along the axis of the piston.

Further, the present invention provides a gas actuator, wherein the plurality of ventilation holes are evenly distributed on the peripheral wall of the container.

Further, the present invention provides a gas-fired actuator, wherein the lower end of the container is sealedly connected to the blocking plate.

Further, the present invention provides a gas-fired actuator, wherein the relief hole is a circular hole that is large at both ends and small in the middle.

Further, the present invention provides a gas actuator, wherein a threading hole is provided in the blocking plate, and the electric wire is drawn out from the threading hole of the blocking plate.

Further, the present invention provides a gas actuator, wherein a sliding sealing structure is provided between the piston and the cylinder.

Compared with the prior art, the gas actuator of the present invention has the following advantages: the present invention provides a cylinder barrel and a piston in the cylinder barrel, seals and fixes a hollow piston rod on the lower side of the piston, and allows the lower end of the piston rod to extend Out the cylinder barrel and seal and fix the blocking plate, set the gas generator in the piston rod, make the gas generator set the container and the gunpowder and igniter in the container, let the container adopt the tubular structure with the upper end closed, and fix the lower end of the container in the blocking plate. On the plate, a plurality of ventilation holes are arranged on the peripheral wall of the container, the igniter is arranged on the lower side of the gunpowder, the igniter is connected to the electric wire drawn from the blocking plate, and the piston is arranged to communicate with the inner cavity of the cylinder and the piston rod. cavity vent hole. Therefore, a gas actuator with simple structure, low cost, high integration, small volume and light weight is formed. In practical application, the blocking plate at the lower end of the piston rod is connected with the fixed lower support, the upper end of the cylinder is connected with the upper support set on the load, and the lead end of the wire is connected with the power supply through the ignition line. When the power is turned on, the igniter of the gas generator starts and ignites the gunpowder, and a large amount of gas generated by the combustion of the gunpowder will enter the inner chamber of the cylinder barrel through the vent hole, the inner cavity of the piston rod and the discharge hole in turn, and will be released under the action of high-pressure gas. The cylinder barrel is moved relative to the piston and the piston rod, so as to achieve the technical purpose of pushing the load. By integrating the gas generator into the inner cavity of the piston rod, the invention utilizes the body structure of the piston rod to bear the high-pressure load when the gas is generated. After that, there is no need to connect an external air source through the pipeline, which simplifies the structure and connection relationship, reduces the volume and occupied space, and can be controlled only by electrical connection, which can fully meet the application requirements of small space, large load and single use, and Can effectively reduce costs.

A gas-fired actuator of the present invention will be described in further detail below with reference to the specific embodiments shown in the accompanying drawings.

Description of drawings

1 is a schematic structural diagram of a gas actuator of the present invention;

FIG. 2 is a schematic diagram of the use state of a gas actuator according to the present invention.

Detailed ways

First of all, it should be noted that the orientation words such as upper, lower, left, right, front and rear described in the present invention are only descriptions according to the accompanying drawings, so as to facilitate understanding and do not limit the technical solutions of the present invention and the claimed protection scope. .

As shown in FIG. 1 , a specific embodiment of a gas actuator of the present invention includes a cylinder bore 1 and a piston 2 arranged in the cylinder bore 1 . The hollow piston rod 3 is sealed and fixed on the lower side of the piston 2 , the lower end of the piston rod 3 extends out of the cylinder 1 , the blocking plate 31 is sealed and fixed on the lower end of the piston rod 3 , and a gas generator 4 is arranged in the piston rod 3 . Let the gas generator 4 set the container 41 and the powder 42 and the igniter 43 in the container 41 . The container 41 adopts a tubular structure with a closed upper end, the lower end of the container 41 is fixed on the blocking plate 31 , and a plurality of ventilation holes 44 are arranged on the peripheral wall of the container 41 . The igniter 43 is provided on the lower side of the powder 42 , and the igniter 43 is connected to the electric wire 5 drawn from the blocking plate 31 . And the piston 2 is provided with a discharge hole 21 communicating with the inner cavity of the cylinder 1 and the inner cavity of the piston rod 3 .

A gas actuator with simple structure, low cost, high integration, small volume and light weight is formed by the above structure arrangement. In practical applications, as shown in FIG. 2 , the blocking plate 31 at the lower end of the piston rod 3 is connected to the fixed lower support, the upper end of the cylinder 1 is connected to the upper support provided on the load 100 , and the wires 5 are connected. The terminal of the fuse is connected to the power supply 200 through the ignition line. When the power supply 200 is turned on, the igniter 43 of the gas generator 4 starts and ignites the gunpowder 42, and a large amount of gas generated by the combustion of the gunpowder 42 will enter the cylinder barrel 1 through the vent hole 44, the inner cavity of the piston rod 3 and the discharge hole 21 in turn. The inner cavity, under the action of high-pressure gas, will make the cylinder 1 move relative to the piston 2 and the piston rod 3, so as to achieve the technical purpose of pushing the load 100. In the present invention, by integrating the gas generator 4 in the inner cavity of the piston rod 3, the body structure of the piston rod 3 is used to bear the high pressure load when the gas is generated, and the integrated gas generator 4 does not increase excessive structural mass, and After the gas generator 4 is integrated, there is no need to connect an external gas source through the pipeline, which simplifies the structure and connection relationship, reduces the volume and occupied space, and can be controlled only by electrical connection, which can fully meet the requirements of small space, large load and single use. application requirements, and can effectively reduce the cost of use. It should be noted that, in practical applications, in order to ensure the balance of the structure and the smoothness of the action, the present invention usually makes the container 41 , the piston rod 3 and the piston 2 coaxially arranged, and the discharge hole 21 is arranged along the axis of the piston 2 set up.

As an optimized solution, in this specific embodiment, an electrical connector 6 is provided at the lead-out end of the electric wire 5 , and the electrical connector 6 is fixed on one side of the blocking plate 31 . By arranging the electrical connector 6, the ignition line and the power supply can be quickly and reliably connected, which improves the convenience of operation. In order to enhance the stability of the structure and the smoothness of the action, in this specific embodiment, the piston rod 3 passes through the bottom wall of the cylinder tube 1 and the two are slidably matched, and an exhaust hole 11 is provided on the peripheral wall of the lower end of the cylinder tube 1 . , so as not to hold your breath and interfere with normal movements. In order to facilitate connection, in this specific embodiment, a fixed upper lug 7 is provided on the upper side of the top wall of the cylinder 1 , and a fixed lower lug 8 is provided on the lower side of the blocking plate 31 .

It should be noted that, in practical applications, the present invention usually makes a plurality of ventilation holes 44 evenly distributed on the peripheral wall of the container 41 to ensure the uniformity of air flow; the lower end of the container 41 is sealed with the blocking plate 31 to enhance The tightness of the bottom of the inner cavity of the piston rod 3. In order to facilitate the design and control of the air flow, the present invention makes the discharge hole 21 adopt a circular hole structure that is large at both ends and small in the middle. The discharge holes 21 of this structure can play a role of confluence when the air flows into the discharge holes 21 , and can play a role of uniform distribution when the air flows out of the discharge holes 21 . However, the structure of the relief hole 21 is not limited to the above-listed forms, and other forms of special-shaped hole structures may also be used according to the actuation speed. In order to facilitate the arrangement of the electric wires 5 , the present invention provides a threading hole in the blocking plate 31 , and the electric wires 5 are led out from the threading hole of the blocking plate 31 . In addition, in order to ensure the sealing performance between the piston 2 and the cylinder 1, a sliding sealing structure is usually provided between the two, and the sliding sealing structure is a mature technology in the field, and will not be repeated here.

The above embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of protection of the present invention. Without departing from the design concept of the present invention, those skilled in the art can make various Deformations shall fall within the protection scope determined by the claims of the present invention.

Claims (10)

1. A gas actuator, comprising a cylinder (1) and a piston (2) arranged in the cylinder (1), characterized in that a hollow piston rod is sealed and fixed on the lower side of the piston (2) (3), the lower end of the piston rod (3) extends out of the cylinder (1) and is sealed and fixed with a blocking plate (31), and a gas generator (4) is provided in the piston rod (3); the gas generator (4) comprising a container (41), a gunpowder (42) and an igniter (43) arranged in the container (41), the container (41) is a tubular structure with a closed upper end, and the lower end of the container (41) is fixed on the plug On the plate (31), a plurality of ventilation holes (44) are provided on the peripheral wall of the container (41), the igniter (43) is located on the lower side of the gunpowder (42), and the igniter (43) is connected with a plug from the blocking plate (43). 31) the wire (5) drawn out; the piston (2) is provided with a discharge hole (21) that communicates with the inner cavity of the cylinder (1) and the inner cavity of the piston rod (3). 2. A gas actuator according to claim 1, characterized in that an electrical connector (6) is connected to the lead end of the electric wire (5), and the electrical connector (6) is fixed on the blocking plate (31) side. 3. A gas actuator according to claim 2, characterized in that, the piston rod (3) passes through the bottom wall of the cylinder (1) and makes the two slidably fit, and the cylinder (1) An exhaust hole (11) is arranged on the peripheral wall of the lower end. 4 . The gas actuator according to claim 3 , wherein an upper support lug ( 7 ) is fixed on the upper side of the top wall of the cylinder barrel ( 1 ), and a lower lug ( 7 ) of the blocking plate ( 31 ) is fixed on the upper side. 5 . A lower support lug (8) is fixed on the side. 5 . The gas actuator according to claim 4 , wherein the container ( 41 ), the piston rod ( 3 ) and the piston ( 2 ) are coaxially arranged, and the discharge hole ( 21 ) is along the The axis of the piston (2) is set. 6. The gas actuator according to any one of claims 1-5, wherein the plurality of ventilation holes (44) are evenly distributed on the peripheral wall of the container (41). 7. The gas actuator according to any one of claims 1-5, characterized in that the lower end of the container (41) is sealedly connected to the blocking plate (31). 8. A gas-fired actuator according to any one of claims 1-5, characterized in that, the relief hole (21) is a circular hole that is large at both ends and small in the middle. 9. A gas actuator according to any one of claims 1-5, characterized in that a threading hole is provided in the blocking plate (31), and the electric wire (5) passes from the blocking plate (31) lead out from the threading hole. 10. A gas actuator according to any one of claims 1-5, characterized in that a sliding sealing structure is provided between the piston (2) and the cylinder (1).

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