CN2553195Y

CN2553195Y - Cylinder

Info

Publication number: CN2553195Y
Application number: CN 02268293
Authority: CN
Inventors: 刘书法; 刘汝新; 洪之刚
Original assignee: BOTA PNEUMATIC HYDRAULIC ENGINEERING Co Ltd YANTAI CITY
Current assignee: BOTA PNEUMATIC HYDRAULIC ENGINEERING Co Ltd YANTAI CITY
Priority date: 2002-07-12
Filing date: 2002-07-12
Publication date: 2003-05-28
Anticipated expiration: 2012-07-12

Abstract

The utility model discloses a cylinder, which comprises a cylinder barrel, a piston rod, a piston, a sealing ring, a front cover and a rear cover. The utility model is characterized in that a pneumatic checking and reversing valve combined with the cylinder is fixed at the bottom of the cylinder barrel; a self locking apparatus is arranged in the cylinder barrel; the cylinder piston and the piston rod are connected with each other through an axle pin. The utility model has the advantages of automatic locking of the cylinder piston when not in use, firm piston connection, good dustproof effect and high efficiency.

Description

A kind of cylinder

One, technical field

The utility model belongs to the cylinder technical field, especially relates to a kind of cylinder with self-locking device.

Two, background technique

The existing cylinder of deciding device with lock, its locking device is in the state of stretching out all the time, when the each return of cylinder, the end-beveling of nut all will impact fixing pin, locking device rate of fault height, the selector valve that cylinder is with that has simultaneously selector valve at present all is a slide-valve structure, and dirt exclusion capabilities is poor, spool often occurs at the big environment back warp of high-temperature dust and stops up the situation that cylinder is failure to actuate.And existing band valve cylinder all is light-duty cylinder, and it is locking that piston rod and piston attaching nut only are furnished with spring washer, can come off at strong motion environment lower piston rod.Also both do not had the cut-off type selector valve at present, and adopted in each joint again and strengthen connecting, product cylinder that again can high temperature resistant use.

Three, summary of the invention

The purpose of this utility model be to improve the deficiency of prior art and provide a kind of cylinder piston when not using, to automatically lock, piston is connected firmly, good dustproof effect, cylinder that efficient is high.

The purpose of this utility model is to realize like this, a kind of cylinder, be by cylinder barrel, piston rod, piston, seal ring, composition such as protecgulum and bonnet, be characterized in that the cylinder barrel bottom is fixed with selector valve, a gas port of selector valve communicates with the cylinder barrel back cavity by the bonnet bottom, another gas port of selector valve communicates with the tracheae of bonnet one side, the other end of tracheae communicates with the cylinder barrel ante-chamber by protecgulum, cushion collar and back cushion collar before the both sides of piston rod upper piston are fixed with respectively, back cushion collar is provided with annular fixed groove, side in rear cover body is provided with the spring bolt chamber, be provided with mobilizable locking bearing pin in the spring bolt chamber, locking bearing pin middle part diameter is greater than the two ends diameter, in the annular fixed groove after one end of locking bearing pin can stretch on the cushion collar, be provided with and lock the axial vertical pore of bearing pin near bonnet bottom one side on the spring bolt chamber, pore communicates with the suction port of selector valve, is provided with spring between locking bearing pin and back tegmental wall.

In order further to realize the purpose of this utility model, can also be that selector valve is to be provided with two cavitys in valve body, respectively be provided with a valve rod in two cavitys, be provided with spring between one end of valve rod and valve body, the other end is provided with control piston, the inner chamber of two cavitys is divided into ante-chamber, back cavity and control chamber three parts, be with sealing gasket on the valve rod in the back cavity of a cavity, before sealing gasket can be sealed, passage between back cavity, the suction port of the selector valve on ante-chamber and the valve body communicates, before another cavity, respectively be provided with a sealing gasket on the valve rod in the back cavity, before two sealing gaskets can not sealed simultaneously, passage between back cavity, the ante-chamber of two cavitys, control chamber communicates respectively, and control chamber also communicates with control gas port on the valve body, and the ante-chamber of cavity is provided with gas port.

In order to reach the purpose that prevents piston work relax, can also be between the piston rod behind back cushion collar and the piston attaching nut, to be provided with the taper pin pin joint.

Compared with the prior art the utility model has following distinguishing feature and good effect: cylinder of the present utility model is equipped with the locking bearing pin of band piston at the bonnet place, be processed with annular fixed groove on the back cushion collar, the air pressure of guiding locking bearing pin place into by selector valve under cylinder band gaseity promotes to lock bearing pin all the time and is separated from fixed groove, cylinder energy regular event, the air pressure of guiding the latching ram place when cylinder is stopped the supple of gas or steam into disappears, the pressure spring at locking bearing pin rear portion promotes the locking bearing pin and is bumped into fixed groove, play the effect that automatically locks cylinder piston rod, the locking device of cylinder of invention locking device and being failure to actuate when cylinder normally uses, be not hit, more reasonable structure, can therefore not increase fault to cylinder, cylinder locates to adopt taper pin fixing locking at piston rod and piston attaching nut, can not come off at strong motion environment lower piston rod.

Four, description of drawings

Below in conjunction with drawings and Examples the utility model is described in further details.

Fig. 1 is a kind of structural representation of the present utility model.

Fig. 2 is an another kind of structural representation of the present utility model.

Fig. 3 is Fig. 1,2 A-A sectional view.

Fig. 4 is the selector valve structural representation.

Fig. 5 is the A-A sectional view of Fig. 4.

Fig. 6 is the B-B sectional view of Fig. 4.

Five, specific embodiments

Embodiment 1, a kind of cylinder, with reference to Fig. 1, Fig. 3, Fig. 4, Fig. 5, Fig. 6, protecgulum 5 is used at two ends at cylinder barrel 1, bonnet 6 seals up, form sealed cavity, be provided with piston rod 2 in the cylinder barrel 1, piston rod 2 passes protecgulum 5, one end of piston rod 2 is fixed with piston 3, bonnet 6 bottoms are fixed with selector valve 7, selector valve 7 is provided with two cavitys 20 in valve body 19,21, two cavitys 20, respectively be provided with a valve rod 22 in 21,23, valve rod 22,19 of an end of 23 and valve bodies are provided with spring 24, the other end is provided with control piston 25, two cavitys 20,21 inner chambers are divided into ante-chamber, back cavity and control chamber three parts, be with sealing gasket 26 on the valve rod 22 in the back cavity of cavity 20, before sealing gasket 26 can be sealed, passage between back cavity, the suction port 17 of the selector valve 7 on ante-chamber and the valve body 19 communicates, before the cavity 21, respectively be provided with a sealing gasket 26 on the valve rod 23 in the back cavity, before two sealing gaskets 26 can not sealed simultaneously, passage between back cavity, two cavitys 20,21 ante-chamber, control chamber communicates respectively, control chamber also communicates with control gas port 27 on the valve body 19, the ante-chamber of cavity 21 also is provided with gas port 29, a gas port 8 of selector valve 7 communicates with cylinder barrel 1 back cavity by the bonnet 6 of cylinder barrel 1 bottom, another gas port 9 of selector valve 7 communicates with the tracheae 10 of bonnet 6 one sides, the other end of tracheae 10 communicates with cylinder barrel 1 ante-chamber by protecgulum 5, cushion collar 11 and back cushion collar 12 before the both sides of piston rod 2 upper pistons 3 in the cylinder barrel 1 are fixed with respectively, back cushion collar 12 is provided with annular fixed groove 13, side in bonnet 6 bodies is provided with spring bolt chamber 15, be provided with mobilizable locking bearing pin 14 in the spring bolt chamber 15, locking bearing pin 14 middle part diameters are greater than the two ends diameter, in the annular fixed groove 13 after one end of locking bearing pin 14 can stretch on the cushion collar 12, close bonnet 6 bottoms one side is provided with and locks bearing pin 14 axial vertical pores 16 on spring bolt chamber 15, pore 16 communicates by the gas port on the selector valve 7 29 with the suction port 17 of selector valve 7, in between bonnet 6 walls, be provided with spring 18 at locking bearing pin 14, in order to strengthen the tightness of cylinder, 5 of piston rod 2 and protecgulums, 1 of piston 3 and cylinder barrel, 15 of locking pivot pin 14 and locking axocoels, the control piston 25 and the cavity 20 of selector valve 7, seal ring 4 is installed in the place between 21 walls etc.

Embodiment 2, and a kind of cylinder with reference to Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, is on embodiment 1 basis, are provided with taper pin 28 pin joints between the piston rod 2 behind back cushion collar 12 and piston 3 attaching nuts, get loose to prevent piston 3, and other are identical with embodiment 1.

When using the utility model, the suction port 17 of selector valve 7 can be ventilated all the time, at this moment, gas enters spring bolt chamber 15 respectively by suction port 17, in the ante-chamber of a cavity 20 of selector valve 7, promoting locking bearing pin 14 throws off with the annular fixed groove 13 on the cushion collar 12 of back, gas enters two cavitys 20 of selector valve 7 simultaneously, 21 ante-chamber, and by gas port 9, bonnet 6, tracheae 10, protecgulum 5 enters the ante-chamber of cylinder body 1, promote piston 3 and be in the return state, gas in the back cavity is pressed, by bonnet 6, gas port 8, gas port 31 exhausts, this moment, gas was by gas port 29, pore 16 enters in the spring bolt chamber 15, locking bearing pin 14 is thrown off fixed groove 13, when the control gas port 27 of selector valve 7 is given gas, gas enters two cavitys 20 of selector valve 7, in 21 the control chamber, promote control piston 25 motions, make in face of sealing gasket 26 seals up, passage between back cavity, in face of opening down, passage between back cavity, the gas that enters of suction port 17 gas port 8 by selector valve 7 just like this, bonnet 6 enters in cylinder body 1 back cavity, promote piston 3 motions, gas in the ante-chamber is pressed, by protecgulum 5, tracheae 10, bonnet 6, gas port 9, gas port 30 exhausts, when stopping to give gas to selector valve 7 suction ports 17, the air pressure in spring bolt chamber 15 disappears, locking pivot pin 14 is just ejected locking axocoel 15 by spring 18 like this, in the annular fixed groove 13 after locking pivot pin 14 is stretched on the cushion collar 12, pin piston 3.

Claims

1, a kind of cylinder, be by cylinder barrel (1), piston rod (2), piston (3), seal ring (4), protecgulum (5) and bonnet compositions such as (6), it is characterized in that cylinder barrel (1) bottom is fixed with selector valve (7), a gas port (8) of selector valve (7) communicates with cylinder barrel (1) back cavity by bonnet (6) bottom, another gas port (9) of selector valve (7) communicates with the tracheae (10) of bonnet (6) one sides, the other end of tracheae (10) communicates with cylinder barrel (1) ante-chamber by protecgulum (5), the both sides of piston rod (2) upper piston (3) are fixed with preceding cushion collar (11) and back cushion collar (12) respectively, back cushion collar (12) is provided with annular fixed groove (13), side in bonnet (6) body is provided with spring bolt chamber (15), be provided with mobilizable locking bearing pin (14) in the spring bolt chamber (15), locking bearing pin (14) middle part diameter is greater than the two ends diameter, in the annular fixed groove (13) after one end of locking bearing pin (14) can stretch on the cushion collar (12), go up close bonnet (6) bottom one side in spring bolt chamber (15) and be provided with and lock axially vertical pore (16) of bearing pin (14), pore (16) communicates with the suction port (17) of selector valve (7), is provided with spring (18) between locking bearing pin (14) and bonnet (6) wall.

2, a kind of cylinder according to claim 1, it is characterized in that described selector valve (7) is to be provided with two cavitys (20) in valve body (19), (21), two cavitys (20), (21) respectively be provided with a valve rod (22) in, (23), valve rod (22), be provided with spring (24) between an end (23) and valve body (19), the other end is provided with control piston (25), two cavitys (20), (21) inner chamber is divided into ante-chamber, back cavity and control chamber three parts, be with sealing gasket (26) on the valve rod in the back cavity of cavity (20) (22), before sealing gasket (26) can be sealed, passage between back cavity, the suction port (17) of the selector valve (7) on ante-chamber and the valve body (19) communicates, before the cavity (21), respectively be provided with a sealing gasket (26) on the valve rod (23) in the back cavity, before two sealing gaskets (26) can not sealed simultaneously, passage between back cavity, two cavitys (20), (21) ante-chamber, control chamber communicates respectively, control chamber also communicates with control gas port (27) on the valve body (19), and the ante-chamber of cavity (21) is provided with gas port (29).

3, a kind of cylinder according to claim 1 is characterized in that being provided with taper pin (28) pin joint between the piston rod (2) behind back cushion collar (12) and piston (3) attaching nut.