CN203430904U

CN203430904U - Air cylinder proximity switch fixing device and air cylinder with no-offset proximity switch

Info

Publication number: CN203430904U
Application number: CN201320465386.4U
Authority: CN
Inventors: 曹岑敏; 傅涵东; 葛林; 金毅
Original assignee: SHANGHAI REFINE AUTOMATION SYSTEMS CO Ltd
Current assignee: SHANGHAI REFINE AUTOMATION SYSTEMS CO Ltd
Priority date: 2013-07-31
Filing date: 2013-07-31
Publication date: 2014-02-12
Anticipated expiration: 2023-07-31

Abstract

The utility model discloses an air cylinder proximity switch fixing device. A proximity switch is located in a T-shaped groove of an air cylinder; the fixing device comprises a pressing bar and an elastic body; the pressing bar and the elastic body are located in the T-shaped groove; the elastic body is arranged for pressing the proximity switch; the pressing bar is arranged for pressing the elastic body; the pressing bar and the elastic body are fixed by a bolt. According to the air cylinder proximity switch fixing device, under the premise of not changing the structure of the existing air cylinder product, the existing T-shaped groove of the air cylinder is used, the proximity switch fixing device in the prior art is omitted, the proximity switch is fixed by an external pressing fixing device, the fixing mode of the proximity switch is reliable, no offset exists in the acting process of the air cylinder, and further the accuracy of a signal is ensured.

Description

A kind of cylinder approach switch fixing device and the cylinder having without skew approach switch

Technical field

The utility model relates to a kind of fixing device, relates in particular to a kind of cylinder approach switch fixing device.

Background technique

Along with the fast development of modern industry, people are more and more higher to the requirement of cylinder, and cylinder has does two classes linear reciprocating motion and that do reciprocally swinging.Typical air cylinder structure comprises cylinder barrel, end cap, piston, piston rod and Sealing, and the internal diameter size of cylinder barrel has represented the size of cylinder ouput force, end cap is provided with intake and exhaust port, what have is also provided with damping mechanism in end cap, bar side end cap is provided with seal ring and dust ring, from piston rod, outwards leak gas and prevent that external dust from sneaking in cylinder preventing, bar side end cap is provided with guide sleeve, to improve the guiding accuracy of cylinder, bear transverse load a small amount of on piston rod, lower curved amount when reducing piston rod and stretching out, extend cylinder working life, guide sleeve uses oil-impregnated sintered alloy conventionally, copper casting leans forward, end cap used malleable cast iron, for weight reduction antirust, the normal aluminium alloy compression casting that uses, small-bore cylinder has use brass material, piston is the part that is stressed in cylinder, for preventing the piston left and right two mutual gas blowbies in chamber, be provided with piston packing, wear ring on piston can improve the guidance quality of cylinder, reduce the abrasion of piston packing, capable of reducing friction resistance, the long materials such as polyurethane, teflon, folder cloth synthetic resin that use of wear ring, the width of piston is decided by seal ring size and necessary sliding parts length, sliding parts is too short, easily cause premature wear and stuck, material Aluminium Alloys in Common Use and the cast iron of piston, the piston of small-sized cylinder has brass to make, piston rod is most important stressed part in cylinder, conventionally use high carbon steel, surface through hard chromium plating process or use stainless steel, with corrosion protection, and improve the wear resistance of seal ring, the parts sealing of revolution or to-and-fro motion place is called motive sealing, and the sealing of static element part is called static seal.

In air cylinder structure, in order to detect the position of piston movement, generally adopt approach switch.Approach switch be a kind of for industrial automation control system with realize to detect, control and with the novel switched element that the overall oncontacting of output element is revealed, when approach switch approaches object certain distance, send control signal.In existing air cylinder structure, its supporting approach switch is set to be fixed in the T-shaped groove of cylinder, and this means of fixation makes approach switch in the course of the work be easy to become flexible, and then causes the skew of approach switch position, dropout, cannot guarantee to work.

Therefore, those skilled in the art is devoted to develop a kind of cylinder approach switch fixing device.

Model utility content

Because the above-mentioned defect of prior art, the utility model provides a kind of cylinder approach switch fixing device.Basic principle of the present utility model is: approach switch is the pith in cylinder, also be the core parts that detect cylinder piston position, be directly connected to the working effect of cylinder, in order to guarantee that approach switch is not offset holding position in cylinder start, guarantee the accuracy of signal, the utility model is given up the means of fixation of existing approach switch, adopt a kind of new external-compression type fixing device to be fixed approach switch, further the sensitive surface direct relation of approach switch is controlled effect, and the utility model is further studied the sensitive surface without skew contact-making switch.

The utility model provides a kind of cylinder approach switch fixing device, approach switch is positioned at the T-shaped groove of cylinder, described fixing device comprises press strip and elastomer, described press strip and described elastomer are positioned at described T-shaped groove, described elastomer is set to push down approach switch, described press strip is set to push down described elastomer, and described press strip and described elastomer are bolted.

Further, described elastomer material is PVC＝polyvinyl chloride.

Further, described elastomer material is soft PVC.

Further, described elastomer thickness is 1.5mm～2mm.

The utility model provides a kind of cylinder having without skew approach switch, described cylinder has the first approach switch and the second approach switch, wherein, described the first approach switch is positioned at the first T-shaped groove of cylinder, described the first approach switch is fixed by the first pressing plate and the first elastomer, described the first elastomer is set to be positioned at the first T-shaped groove and pushes down described the first approach switch, described the first pressing plate is set to be positioned at the first T-shaped groove and pushes down described the first elastomer, and described the first switch, the first elastomer and the first pressing plate are bolted; Described the second approach switch is positioned at the second T-shaped groove of cylinder, described the second T-shaped groove and described the first T-shaped groove are positioned at the homonymy of cylinder, described the second approach switch is fixed by the second pressing plate and the second elastomer, described the second elastomer is set to be positioned at the second T-shaped groove and pushes down described the second approach switch, described the second pressing plate is set to be positioned at the second T-shaped groove and pushes down described the second elastomer, and described second switch, the second elastomer and the second pressing plate are bolted.

Further, the sensitive surface of described the first approach switch and the second approach switch is rectangle, and induction area is 4mm*4mm.

Further, described the first approach switch and the second approach switch are Festo AND series SMT-8M-PS-24V-K-2,5-OE, and the response time is 3.4ms.

Further, described the first approach switch and the second approach switch are inductance approach switch.

Further, described the first elastomer and described the second elastomer material are PVC＝polyvinyl chloride.

Further, described the first elastomer and described the second elastomer material are soft PVC.

Further, described the first elastomer and described the second elastomer thickness are 1.5mm～2mm.

Further, described cylinder is Festo AND series, the cylinder that cylinder diameter is 32mm.

What the utility model provided has without the cylinder that is offset approach switch, do not changing under the prerequisite of existing product cylinder structure, utilize the existing T-shaped groove of cylinder, the fixing device of giving up approach switch in prior art, adopt external-compression type fixing device to be fixed approach switch, the external-compression type fixing device that the utility model provides comprises pressing plate and certain thickness elastomer, its center platen and elastomer can be processed according to actual needs voluntarily, and with bolt plug in T-shaped groove, utilize nut, bullet pad, plain cushion is pressed in pressing plate and elastomer on approach switch, use the moment fastening nut of 20Nm for torque wrench, until elastomer flattens completely, approach switch can fully be fixed, by repeatedly testing, what the utility model provided has without the cylinder that is offset approach switch, the means of fixation of its approach switch is reliable, in cylinder start process, there is not any skew, and then guaranteed the accuracy of signal.

Below with reference to accompanying drawing, the technique effect of design of the present utility model, concrete structure and generation is described further, to understand fully the purpose of this utility model, feature and effect.

Accompanying drawing explanation

Fig. 1 is the worm's eye view without the cylinder of skew approach switch that has of a preferred embodiment of the present utility model.

Fig. 2 is the front view having in Fig. 1 without the cylinder of skew approach switch.

Fig. 3 is the side view having in Fig. 1 without the cylinder of skew approach switch.

Fig. 4 is the part enlarged view of Fig. 3.

Embodiment

Below in conjunction with accompanying drawing, scheme of the present utility model is described.

In accompanying drawing, 1 represents cylinder, and 2 represent ears ring seat, and 3 represent joint shaft bearing, and 4 represent straight joint, and 5 represent approach switch, and 6 represent pressing plate, and 7 represent elastomer, and 8 represent bolt, and 9 represent plain washer, and 10 represent elastic washer, and 11 represent nut.

Fig. 1 is the worm's eye view without the cylinder of skew approach switch that has in preferred embodiment of the present utility model, as shown in Figure 1, in a preferred embodiment of the present utility model, cylinder is Festo AND series, cylinder diameter is the cylinder of 32mm, the cylinder having without skew approach switch comprises approach switch, pressing plate, elastomer, pressing plate, elastomer and approach switch are all positioned at the T-shaped groove of cylinder, pressing plate and elastomer are set to push down approach switch and are bolted, particularly, elastomer is set to push down approach switch, press strip is set to push down elastomer, approach switch, elastomer and press strip are bolted.The number of approach switch is 2, lays respectively in 2 T-shaped grooves of homonymy, and for detection of two positions of cylinder piston, what piston moved in cylinder is upper and the next.Each approach switch all adopts pressing plate and elastomer to fix, and elastomer is the soft crystal slab of PVC, and thickness is 2mm.Each approach switch is inductance approach switch, and its sensitive surface is rectangle, and induction area is 4mm*4mm.In a preferred embodiment of the present utility model, approach switch is Festo AND series SMT-8M-PS-24V-K-2,5-OE, and the response time is 3.4ms.

Fig. 2 is the front view having in Fig. 1 without the cylinder of skew approach switch.Fig. 3 is the side view having in Fig. 1 without the cylinder of skew approach switch.Fig. 4 is the part enlarged view of Fig. 3.As shown in the figure, pressing plate and elastomer are set to push down approach switch and are bolted, and in order further to strengthen fixed effect, adopt bolt, plain washer, elastic washer and nut that pressing plate and elastomer are pressed on approach switch, elastomer flattens completely, makes the approach switch can be fully fixing.In a preferred embodiment of the present utility model, bolt adopts the hex head bolt of M4*16.

What the utility model provided has without the cylinder that is offset approach switch, do not changing under the prerequisite of existing product cylinder structure, utilize the existing T-shaped groove of cylinder, the fixing device of giving up approach switch in prior art, adopt external-compression type fixing device to be fixed approach switch, the external-compression type fixing device that the utility model provides comprises pressing plate and certain thickness elastomer, its center platen and elastomer can be processed according to actual needs voluntarily, and with special screw plug in T-shaped groove, utilize nut that pressing plate and elastomer are pressed on approach switch, approach switch can fully be fixed, through engineering test, what the utility model provided has without the cylinder that is offset approach switch, the means of fixation of its approach switch is reliable, in cylinder start process, there is not any skew, and then guaranteed the accuracy of signal, be beneficial to control.

More than describe preferred embodiment of the present utility model in detail.The ordinary skill that should be appreciated that related domain just can be made many modifications and variations according to design of the present utility model without creative work.Therefore, all technician in the art comply with design of the present utility model on the basis of existing technology by the available technological scheme of logical analysis, reasoning, or a limited experiment, all should be in the determined protection domain by claims.

Claims

1. a cylinder approach switch fixing device, approach switch is positioned at the T-shaped groove of cylinder, it is characterized in that, described fixing device comprises press strip and elastomer, described press strip and described elastomer are positioned at described T-shaped groove, described elastomer is set to push down approach switch, and described press strip is set to push down described elastomer, and described press strip and described elastomer are bolted.

2. cylinder approach switch fixing device as claimed in claim 1, is characterized in that, described elastomer material is PVC＝polyvinyl chloride.

3. one kind has without the cylinder that is offset approach switch, described cylinder has the first approach switch and the second approach switch, it is characterized in that, described the first approach switch is positioned at the first T-shaped groove of cylinder, described the first approach switch is fixed by the first pressing plate and the first elastomer, described the first elastomer is set to be positioned at the first T-shaped groove and pushes down described the first approach switch, described the first pressing plate is set to be positioned at the first T-shaped groove and pushes down described the first elastomer, and described the first switch, the first elastomer and the first pressing plate are bolted; Described the second approach switch is positioned at the second T-shaped groove of cylinder, described the second T-shaped groove and described the first T-shaped groove are positioned at the homonymy of cylinder, described the second approach switch is fixed by the second pressing plate and the second elastomer, described the second elastomer is set to be positioned at the second T-shaped groove and pushes down described the second approach switch, described the second pressing plate is set to be positioned at the second T-shaped groove and pushes down described the second elastomer, and described second switch, the second elastomer and the second pressing plate are bolted.

4. the cylinder having without skew approach switch as claimed in claim 3, is characterized in that, the sensitive surface of described the first approach switch and the second approach switch is rectangle, and induction area is 4mm*4mm.

5. the cylinder having without skew approach switch as claimed in claim 3, is characterized in that, described the first approach switch and the second approach switch are Festo AND series SMT-8M-PS-24V-K-2,5-OE, and the response time is 3.4ms.

6. the cylinder having without skew approach switch as claimed in claim 3, is characterized in that, described the first approach switch and the second approach switch are inductance approach switch.

7. the cylinder having without skew approach switch as claimed in claim 3, is characterized in that, described the first elastomer and described the second elastomer material are PVC＝polyvinyl chloride.

8. the cylinder having without skew approach switch as claimed in claim 3, is characterized in that, described the first elastomer and described the second elastomer thickness are 1.5mm～2mm.

9. the cylinder having without skew approach switch as claimed in claim 3, is characterized in that, described cylinder is Festo AND series, the cylinder that cylinder diameter is 32mm.