CN216618737U - Piston structure for pneumatic actuator - Google Patents

Abstract

The utility model relates to the technical field of pneumatic actuators, in particular to a piston structure for a pneumatic actuator, which can simplify the processing difficulty, adapt to pistons with different sizes and reduce the cost at the same time, and comprises a piston body, the piston body comprises a disc and a rack which are integrated into a whole, an O-shaped ring and a support ring are clamped on the disc, the outer end face of the rack is provided with grooves to form ribs, the outer end face of the rack is provided with guide plates, the grooves are symmetrically arranged, wherein the two symmetrical grooves are respectively clamped with a positioning block, the outer side surfaces of the two positioning blocks and one same end surface are respectively provided with a first counter bore, the outer side surface and the end surface of the positioning block are clamped with auxiliary backing plates, the auxiliary backing plates are provided with first clamping blocks matched with the first counter bores, the positioning block is characterized in that a second counter bore is formed in the end face of the top of the positioning block, and two bolts matched with the second counter bore are installed on the guide plate.

Description

Piston structure for pneumatic actuator

Technical Field

The utility model relates to the technical field of pneumatic actuators, in particular to a piston structure for a pneumatic actuator.

Background

The pneumatic actuator is an actuating device for opening and closing or adjusting a valve by air pressure, and is also called a pneumatic actuating mechanism or a pneumatic device, and the movement of a piston in a cylinder body is realized by introducing compressed gas, the piston structure of the common pneumatic actuator is shown in figure 1 and comprises a disc and a rack, because the piston and the cylinder body are metal parts and cannot be contacted with each other, a support ring 2 and an O-shaped ring 3 are arranged on the outer peripheral surface of the disc 1, a guide plate 5 matched with the support ring 2 is also arranged on the rack 4, the support ring 2 and the guide plate 5 are both made of wear-resistant composite materials, the rack 4 is provided with a plurality of grooves 6 to form reinforcing ribs for reducing weight and enhancing stability, and in order to install the guide plate shown in figure 1, in addition, a clamping groove matched with the guide plate is also required to be arranged on the rack, so that the guide plate can be installed on the guide plate by matching the clamping block and the clamping groove, because the deflector is to follow the piston and move together, consequently can not take place relative displacement between deflector and the piston, very high precision needs to be guaranteed in the processing of consequently fixture block and draw-in groove, has loosened the relative displacement that takes place easily too much, has too tightly, is difficult to clamp again, puts forward higher requirement to the processing requirement, and to the piston of the size difference, the size of draw-in groove and fixture block also can take place relative change moreover, needs the die sinking again for the cost uprises.

Disclosure of Invention

The utility model provides a piston structure for a pneumatic actuator, which aims to solve the problems that the existing piston is difficult to machine due to the precise matching between the existing piston and a guide plate, and the cost is high due to the fact that pistons with different sizes need to be machined through different guide plates.

The technical scheme is as follows: the utility model provides a piston structure for pneumatic actuator, its includes the piston body, the piston body includes integrative adult disc and rack, O shape circle and support ring have clamped on the disc, the outer terminal surface of rack has seted up the recess and has formed the rib, install the deflector on the outer terminal surface of rack, its characterized in that, recess symmetrical arrangement, wherein clamp respectively in the recess of two symmetries has clamped the locating piece, two first counter bore has been seted up respectively on locating piece lateral surface and the same terminal surface, the joint has supplementary backing plate on locating piece lateral surface and the terminal surface, be provided with on the supplementary backing plate with first fixture block of first counter bore complex, the second counter bore has been seted up to locating piece top terminal surface, install on the deflector two with second counter bore complex bolt.

The oil guide plate is further characterized in that the end face of the top of the guide plate is provided with a reticular oil guide groove.

After the piston positioning block is adopted, a clamping groove which is originally used for clamping the guide plate is omitted, the guide plate is directly arranged by utilizing the groove arranged on the piston body, the positioning block can be fixedly clamped and embedded in the groove by replacing different auxiliary base plates according to pistons with different sizes, the processing is simplified, only one type of guide plate is needed as long as the distance between the two grooves is inconvenient, and the use requirement can be met, so that the cost is greatly reduced.

Drawings

FIG. 1 is a schematic view of a prior art piston configuration;

FIG. 2 is a schematic view of the connection between the guide plate and the positioning block according to the present invention;

fig. 3 is a schematic view of the auxiliary pad.

Detailed Description

Referring to fig. 2 and 3, the piston structure for the pneumatic actuator comprises a piston body, wherein the piston body comprises a disc and a rack 4 which are integrated into a whole, an O-shaped ring and a support ring are clamped on the disc, grooves 6 are formed in the outer end face of the rack 4 to form ribs, a guide plate 5 is installed on the outer end face of the rack 4, the grooves 6 are symmetrically arranged, positioning blocks 7 are respectively clamped in the two symmetrical grooves 6, first counter bores are respectively formed in the outer side faces of the two positioning blocks 7 and one same end face, auxiliary base plates 8 are clamped on the outer side faces of the positioning blocks 7 and the end faces, first clamping blocks 9 matched with the first counter bores are arranged on the auxiliary base plates 8, second counter bores are formed in the top end faces of the positioning blocks 7, and two bolts 10 matched with the second counter bores are installed on the guide plate 5. Offer on 5 top end faces of deflector and be netted oil groove 11 of leading, compare in current plane, lead the oil groove and can let lubricating oil flow through along the groove.

During the in-service use, two locating pieces 7 are used for supporting medial surface and the left side terminal surface of two recesses, and the clearance between the lateral surface of locating piece 7 and the right side terminal surface and the 6 internal surfaces of recess is filled by supplementary backing plate 8 for can not take place to remove in locating piece 7 can be fixed in recess 6, and the installation can be accomplished in inserting the second counter bore through bolt 10 to deflector 5. Under the unchangeable condition of two recess 6 intervals, locating piece 7 and deflector 5 only need a size, change the auxiliary backing plate 8 of different thickness can, saved the die sinking cost, auxiliary backing plate 8 is unified to be processed into discoid, convenient processing.

Claims (2)

1. The utility model provides a piston structure for pneumatic actuator, its includes the piston body, the piston body includes integrative adult disc and rack, O shape circle and support ring have clamped on the disc, the outer terminal surface of rack has seted up the recess and has formed the rib, install the deflector on the outer terminal surface of rack, its characterized in that, recess symmetrical arrangement, wherein clamp respectively in the recess of two symmetries has clamped the locating piece, two first counter bore has been seted up respectively on locating piece lateral surface and the same terminal surface, the joint has supplementary backing plate on locating piece lateral surface and the terminal surface, be provided with on the supplementary backing plate with first fixture block of first counter bore complex, the second counter bore has been seted up to locating piece top terminal surface, install on the deflector two with second counter bore complex bolt.

2. The piston structure for a pneumatic actuator according to claim 1, wherein the guide plate has a mesh-like oil guide groove formed in an end surface of a top portion thereof.

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