CN203161711U

CN203161711U - Oil cylinder

Info

Publication number: CN203161711U
Application number: CN 201320154256
Authority: CN
Inventors: 邹玉英; 布春磊; 江明
Original assignee: State Grid Corp of China SGCC; China Electric Power Research Institute Co Ltd CEPRI
Current assignee: State Grid Corp of China SGCC; China Electric Power Research Institute Co Ltd CEPRI
Priority date: 2013-03-29
Filing date: 2013-03-29
Publication date: 2013-08-28
Anticipated expiration: 2023-03-29

Abstract

An oil cylinder comprises two cylinder barrels, cylinder covers arranged at the top ends of the cylinder barrels and pistons arranged in the cylinder barrels. The bottom ends of the cylinder barrels are in butt joint, the two cylinder barrels are communicated, and limiting clamping keys are arranged on the inner walls of the bottom ends of the two cylinder barrels. The axial size of the oil cylinder is reduced, and using cost is reduced.

Description

A kind of oil cylinder

Technical field

The utility model relates to a kind of oil cylinder.

Background technique

In some application, need 2 table oil cylinders to finish the action that piston stretches out or withdraws back-to-back simultaneously, stretching out or withdraw the power that needs can be different, the action of 2 cylinders successively also can be different, but require the axial dimension of oil cylinder as far as possible little, such as in patent: a kind of load mechanism and load track thereof, the patent No. are that axial dimension directly has influence on size and the user cost of 80 meters load tracks of this patent in 200810103251.7 the application.Conventional oil cylinder is made up of cylinder barrel, piston, cylinder bottom, cylinder cap and sealing, support, link etc., cylinder bottom has the effect of the piston thrust of bearing and sealing fluid, sometimes also bear the effect that is connected and fixed oil cylinder with other parts, ordinary circumstance is indispensable, as shown in Figure 1, but cylinder bottom the axial dimension that has strengthened oil cylinder is set.

The model utility content

The purpose of this utility model provides a kind of oil cylinder, and this oil cylinder has dwindled its axial dimension, has reduced user cost.

Concrete scheme of the present utility model is:

A kind of oil cylinder, comprise the butt joint of two bottoms cylinder barrel, be arranged on the cylinder cap on described cylinder barrel top and be arranged on piston in the cylinder barrel, described two cylinder barrels communicate, the inwall of its bottom is provided with spacing card key.

Adopt technique scheme, technique effect of the present utility model has:

The cylinder bottom of two oil cylinders of the utility model cancellation arranges the movement position that spacing card key replaces two pistons of cylinder bottom restriction, has shortened the axial dimension of oil cylinder.

Be shifted by frequent collision of piston for fear of the card key, also be in order to reduce card key and cylinder barrel size as far as possible simultaneously, reduce the oil cylinder cost, designed the surface of contact of an inclination at piston and card keyed jointing synapsis, its oblique angle can be converted into the axial force of piston the power that part is pointed to the cylinder barrel wall, namely when piston collides the card key, can hit cylinder barrel rather than the knocking-on keyway of level to the card key.

The utility model arranges bulge loop at pistons end, and this bulge loop design can increase the startup area in the big chamber of cylinder, makes piston stretch out action easily.

The utility model is provided with boss in piston end face, make that after the piston A of an end bumped against the card key, the piston B of the other end can not hit the card key from opposite side again, but the boss of meeting piston A earlier unloads power, this design has been lowered the card key from another point of view and has been hit number of times, prolongs its fatigue life.

For the ease of assembling, the card key is the part annular, can be cut into a plurality of.

Be provided with circlip on card key top, fixing card key prevents from dropping out.

At the piston right-hand member, be provided with and block the inclined-plane that key matches, make the horizontal force of piston produce oblique thrust to inner wall of cylinder, so that need not embedding too deeply, the card key just can not released keyway by piston thrust.

Because oil cylinder mainly bears lateral force, cylinder cap adopts bronze material, is satisfying under the prerequisite of seal request, and axial dimension has been accomplished the shortest.

Description of drawings

Fig. 1 is the structural representation of oil cylinder in the prior art;

Fig. 2 is the structural representation of the oil cylinder that provides of the utility model;

Fig. 3 is the enlarged view at the local a of Fig. 2 place;

Fig. 4 is the front view of spacing card key in the utility model;

Fig. 5 is the sectional view of Fig. 4;

Fig. 6 is structure of piston schematic representation in the utility model.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Embodiment as shown in Figure 2, a kind of oil cylinder, comprise the butt joint of two bottoms cylinder barrel 3, be arranged on the cylinder cap 1 on described cylinder barrel 3 tops and be arranged on piston 2 in the cylinder barrel 3, described two cylinder barrels 3 communicate, the inwall of its bottom is provided with spacing card key 4, be provided with circlip 5 on the top of described spacing card key 4, under the situation of length overall 230mm, realized two ends piston each 50mm of stroke S that stretches.

Embodiment as shown in Figure 3, described spacing card key 4 ringwise or part annular protrusion shape, this convex has the plane of inclination that contacts with described piston 2, and it is 30 ° that the tilt angle of described plane of inclination is preferably, and described piston 2 end face corners have the inclined-plane parallel with described plane of inclination; This inclined-plane cooperates with the plane of inclination of spacing card key 4, makes the horizontal force generation of piston 2 to the oblique thrust of cylinder barrel 3 inwalls, so that spacing card key 4 can not released keyway by piston thrust; In the present embodiment, because the retracting force of this oil cylinder is little, spacing card key 4 surface of contact inclination angles are elected 30 ° as, make the power perpendicular to cylinder barrel 3 walls reach 1/2 of retracting force, the selection of spacing card key 4 width, except satisfying shearing stress, point of action and the plane of inclination vertical line that also should satisfy middle part, plane of inclination power are positioned at spacing card key 4 bottoms (being cylinder wall keyway bottom), so that repeatedly under the collision effect, card key indefatigability is destroyed at piston.

Embodiment as shown in Figure 4 and Figure 5, described spacing card key 4 is part annular protrusion shape, for the ease of assembling, spacing card key 4 is cut into 4 parts, is combined to form annular by 4 parts, embeds oil cylinder barrel 3mm, with the vertical width of piston surface of contact be 2.5mm, 30 ° at oblique angle; Middle part at spacing card key 4 end faces is provided with circlip 5, and fixing spacing card key 4 prevents that it from dropping out, and each corner angle of spacing card key 4 all rounding are handled.

Embodiment as shown in Figure 6, the end face axial of described piston 2 is provided with boss, during for the piston of opposite side retraction, no longer hits spacing card key 4 but hits earlier at piston 2 and unload power; The end of described piston 2 is provided with bulge loop, and this bulge loop is a little more than center line, and the design of bulge loop can increase the startup area in the big chamber of cylinder, makes piston stretch out action easily; Gone back conventional design on the piston 2 and sealed and support, made piston 2 can bear certain unbalance loading.

A preferred implementation of the present utility model, described cylinder cap 1 is bronze material, under the prerequisite that guarantees guiding, has further shortened axial dimension.

Another preferred implementation of the present utility model, described cylinder barrel 3 middle parts are provided with big chamber filler opening, and its two ends are provided with the loculus filler opening that staggers, and the parallel connection of described loculus filler opening is connected with outside fuel supply line again.

Because operating mode is stretched out two pistons or the priority of withdrawing does not require, if according to the conventional design cylinder bottom, because two oil cylinders are exerted oneself can be different, cylinder bottom must be according to the power difference design strength of maximum, add both sides sealing and technological requirement, it is a lot of that axial dimension is increased, and brings great difficulty for the track design of adapted, and the equipment user cost significantly rises.

Table 1 is the oil hydraulic cylinder key dimension contrast commonly used of identical cylinder diameter, and data are selected from " mechanical design handbook " the 4th edition Volume Four, Chemical Industry Press.

The oil hydraulic cylinder key dimension contrast commonly used of the identical cylinder diameter of table 1.

?	Cylinder diameter	The bar footpath	External diameter	The long L(of base does not contain stroke)
					This patent oil cylinder	40	25	60	63
The engineering oil hydraulic cylinder	40	25	57	158
					The vehicle oil hydraulic cylinder	40	22	60	115
The metallurgical equipment oil hydraulic cylinder	40	28	58/90	252
					Light-duty pull-rod type oil hydraulic cylinder	40	22	□65	182

As can be seen, the design has significantly reduced length dimension under the identical situation of external diameter from above data contrast.

Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to above-described embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1. oil cylinder, comprise the butt joint of two bottoms cylinder barrel (3), be arranged on the cylinder cap (1) on described cylinder barrel (3) top and be arranged on piston (2) in the cylinder barrel (3), it is characterized in that: described two cylinder barrels (3) communicate, and the inwall of its bottom is provided with spacing card key (4).

2. oil cylinder as claimed in claim 1 is characterized in that: described spacing card key (4) ringwise or part annular protrusion shape, this convex has the plane of inclination that contacts with described piston (2).

3. oil cylinder as claimed in claim 2, it is characterized in that: the tilt angle of described plane of inclination is 30 °.

4. oil cylinder as claimed in claim 2, it is characterized in that: described piston (2) end face corner has the inclined-plane parallel with described plane of inclination.

5. oil cylinder as claimed in claim 1, it is characterized in that: the end face axial of described piston (2) is provided with boss.

6. oil cylinder as claimed in claim 1, it is characterized in that: the top of described spacing card key (4) is provided with circlip (5).

7. oil cylinder as claimed in claim 1, it is characterized in that: the end of described piston (2) is provided with bulge loop.

8. oil cylinder as claimed in claim 1 is characterized in that: described cylinder cap (1) is bronze material.

9. oil cylinder as claimed in claim 1 is characterized in that: described cylinder barrel (3) middle part is provided with big chamber filler opening, and its two ends are provided with the loculus filler opening that staggers, and the parallel connection of described loculus filler opening is connected with outside fuel supply line again.