CN2931884Y - Pneumatic performer - Google Patents

Abstract

The utility model discloses a pneumatic actuator applied in the industries of electric power, metallurgy, petrochemistry, oil refining and the like, comprising a case (1), a cylinder (2), a swinging arm (3), and an output shaft (4), wherein the case (1) is provided with four sets of cylinders (2) and both ends of the swinging arm (3) are connected with the cylinder rods in relative positions of the two cylinders (2) respectively. The previous problem of outputting large torque by using the large cylinders is solved. This utility model has the advantages of compact structure, small volume, stable operation and minor noise, which enables ordinary cylinders to output large torque and is convenient to be installed, fixed and used.

Description

Pneumatic actuator

One, technical field

The utility model relates to the drive unit that a kind of air door baffle plate, valve are used, and specifically relates to a kind of pneumatic actuator.

Two, background technique

Pneumatic actuator is a visual plant in the automatic system control, and it can regulate or open and close apertures such as air door baffle plate, valves.Existing pneumatic actuator generally is associated on the casing by one or two cylinder, and moving by the piston rod drive swing arm (end) of cylinder makes output shaft produce moment of torsion.When needs pneumatic actuator output high pulling torque, use big cylinder to carry out work usually.But the mill requirement on machining accuracy that spreads out of the internal surface of big cylinder is very high, big cylinder spread out mill processing trouble, use inconveniently, operation is inadequately steadily, noise is bigger.

Three, model utility content

The purpose of this utility model is to overcome above-mentioned deficiency, can export high pulling torque, pneumatic actuator easy to use and provide a kind of.

The purpose of this utility model realizes by following technical solution: a kind of pneumatic actuator, comprise casing, cylinder, swing arm, output shaft, the cylinder of installing on the described casing is a quadruplet, and the two ends of swing arm respectively are associated on the piston rod of two cylinders that are in relative position.

After adopting the utility model structure,, thereby make output shaft produce high pulling torque, pneumatic actuator output high pulling torque because the difference (being move toward one another) of the piston rod movement direction of cylinder makes the two ends of swing arm make move toward one another.Therefore, the utility model compared with prior art, compact structure, volume are little, operate steadily, noise is less, use common cylinder also can export high pulling torque, and installation and maintenance is easy to use, can be widely used in industries such as electric power, metallurgy, petrochemical industry, oil refining.

Four, description of drawings

Below in conjunction with accompanying drawing and mode of execution the utility model is described in further detail.

Fig. 1 is the structural representation of the utility model pneumatic actuator.

Five, embodiment

With reference to Fig. 1 as can be known, the utility model pneumatic actuator, comprise casing 1, cylinder 2, swing arm 3, output shaft 4, the cylinder of installing on the described casing 12 is a quadruplet, the two ends of swing arm 3 respectively are associated on the piston rod of two cylinders that are in relative position and (can connect by contiguous block 5 and pin 6, it is connected firmly).As shown in the figure, the piston rod of the upper end of swing arm and two cylinders above the casing links; The piston rod of two cylinders below the lower end of swing arm and the casing links.When the right cylinder operation above the casing, the upper end that makes swing arm is to left movement; Simultaneously, the left cylinder operation below the casing moves right the lower end of swing arm, thereby makes output shaft produce high pulling torque.

Claims (2)

1, a kind of pneumatic actuator, comprise casing (1), cylinder (2), swing arm (3), output shaft (4), it is characterized in that: it is quadruplet that described casing (1) is gone up the cylinder of installing (2), and the two ends of swing arm (3) respectively are associated on the piston rod of two cylinders that are in relative position.

2, pneumatic actuator as claimed in claim 1 is characterized in that: the two ends of described swing arm (3) respectively are associated on the piston rod of two cylinders that are in relative position by contiguous block (5) and pin (6).

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