CN204704191U - A kind of oil cylinder, supporting leg and engineering machinery - Google Patents

Abstract

The utility model discloses a kind of oil cylinder, supporting leg and engineering machinery.This oil cylinder comprises piston rod and cylinder barrel, and described cylinder barrel relative to described piston rod telescopic moving, and can comprise the relatively-stationary oil cylinder cover with described piston rod, and it is outer and be slidably matched with described cylinder barrel that described oil cylinder cover is enclosed within described cylinder barrel.The utility model increases the bearing capacity of oil cylinder, reduces the risk of piston rod distortion fracture, improves operational security.

Description

A kind of oil cylinder, supporting leg and engineering machinery

Technical field

The utility model relates generally to hydraulic press technical field of engineering machinery, specifically, relates to a kind of oil cylinder, and is provided with supporting leg and the engineering machinery of this oil cylinder.

Background technique

In prior art, a kind of structure of common supporting leg as shown in Figure 1, and comprise oil cylinder connecting bolt 1 ', support cylinder, supporting leg dish 4 ' and outrigger arm 5 ', support cylinder comprises cylinder barrel 2 ' and piston rod 3 '.Outrigger arm 5 ' can be shown relative to car body or stretch out, and piston rod 3 ' can stretch up and down 2 ' relative to cylinder barrel, and operationally piston rod 3 ' stretches out, and supporting leg dish 4 ' and earth surface, car body is lifted.

For the support oil cylinder of above-mentioned prior art, general adopt cylinder barrel 2 ' upper, piston rod 3 ' under structural type.When engineering machinery works, cylinder barrel 2 ' is stressed comparatively large with piston rod 3 ' connecting part, and piston rod 3 ' easily produces distortion, fracture, and thus its bearing capacity is poor, and brings unsafe factor to use.In addition, during work, piston rod 3 ' exposes, and its surface is easily impaired.

Model utility content

In view of this, the purpose of this utility model is to provide a kind of oil cylinder, can solve the defect of easily deformable fracture in prior art, bearing capacity difference.

Oil cylinder of the present utility model, comprises piston rod and cylinder barrel, and described cylinder barrel relative to described piston rod telescopic moving, and can comprise the relatively-stationary oil cylinder cover with described piston rod, and it is outer and be slidably matched with described cylinder barrel that described oil cylinder cover is enclosed within described cylinder barrel.

Further, the inwall of described oil cylinder cover is provided with rubber sleeve, and the inwall of described rubber sleeve and the outer wall of described cylinder barrel are slidably matched.

Further, described piston rod is provided with step, described oil cylinder puts the limiting board being provided with and coordinating with described step.

Further, described piston rod is provided with groove, described limiting board is also provided with the clamp with described groove fit.

Further, described clamp is bolted on described limiting board.

Further, the inwall of described cylinder barrel is provided with guide sleeve, and the inwall of described guide sleeve and the outer wall of described piston rod are slidably matched.

Another aspect of the present utility model, also provides a kind of supporting leg, comprises outrigger arm, itself and comprise the oil cylinder of aforementioned any one, described piston rod is positioned at upper end, and described cylinder barrel is positioned at lower end, and the upper end of described oil cylinder cover and piston rod is fixed on described outrigger arm.

Further, the bottom of described cylinder barrel is fixed with bulb, and described supporting leg also comprises supporting leg dish, described supporting leg dish is provided with the ball-and-socket coordinated with described bulb.

Another aspect of the present utility model, also provides a kind of engineering machinery, and described engineering machinery is provided with oil cylinder or the supporting leg of aforementioned any one.

Further, described engineering machinery is specially concrete mixer.

Operationally, oil cylinder cover coordinates with cylinder barrel can ensure that cylinder barrel bears moment of flexure to oil cylinder of the present utility model, thus increases the bearing capacity of oil cylinder, and reduces the risk of piston rod distortion fracture, improves operational security.

In addition, because piston rod during operation is all the time in oil cylinder cover, thus avoids piston rod surface and expose impaired, improve the working life of supporting leg.

Accompanying drawing explanation

The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:

Fig. 1 is the structural representation of a kind of supporting leg of the prior art;

Fig. 2 is the structural representation of the supporting leg of the utility model one embodiment;

Fig. 3 is the enlarged view of a-quadrant in Fig. 2;

Fig. 4 is the enlarged view in B region in Fig. 2.

Wherein, the description of reference numerals in Fig. 1 is as follows:

Connecting bolt-1 ' cylinder barrel-2 '

Piston rod-3 ' supporting leg dish-4 '

Outrigger arm-5 '

Description of reference numerals in Fig. 2-4 is as follows:

Outrigger arm-1 piston rod-2

Cylinder barrel-3 guide sleeve-4

Oil cylinder cover-5 rubber sleeve-6

Limiting board-7 clamp-8

Bolt-9 bulb-10

Supporting leg dish-11

Embodiment

It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.

Be the structural representation of the supporting leg of the utility model one embodiment shown in Fig. 2, Fig. 3 is the enlarged view of a-quadrant in Fig. 2, and Fig. 4 is the enlarged view in B region in Fig. 2.The supporting leg of this embodiment at least comprises outrigger arm 1 and oil cylinder.Should be clear, oil cylinder of the present utility model, except for except the supporting leg of this embodiment, can also be used for other multiple support occasion.

Aforementioned outrigger arm 1 is arranged on car body (or frame), and can carry out swinging or telescopic moving relative to car body, and then forms swing type outrigger or telescopic leg.Outrigger arm 1 can also be the structural type of single oil cylinder, specifically can with reference to technology that is existing and that improve.

Oil cylinder is arranged on outrigger arm 1 at above-below direction, and comprises the piston rod 2 being positioned at upper end and the cylinder barrel 3 being positioned at lower end, and the upper end of piston rod 2 is fixed on outrigger arm 1, and cylinder barrel 3 can relative to piston rod 2 telescopic moving.This oil cylinder both can be two-way cylinder, also can be one-way cylinder.In supporting leg working procedure, outrigger arm 1 launches, and oil cylinder stretches out downwards and applies pressure to ground, and then car body can be lifted, thus plays the supporting effect of stable center of gravity; And when off working states such as travelings, oil cylinder is upwards retracted, outrigger arm 1 is regained.

Cylinder barrel 3 can directly and earth surface, and preferably the supporting leg of this embodiment also comprises supporting leg dish 11, is fixed with bulb 10 in the bottom of cylinder barrel 3, aforementioned supporting leg dish 11 is provided with the ball-and-socket coordinated with bulb 10.Bulb 10 is fixed on cylinder barrel 3 by the mode of welding.

The piston rod 2 of oil cylinder can directly or indirectly be arranged on outrigger arm 1, preferred supporting leg also comprises the oil cylinder cover 5 shown in Fig. 2, this oil cylinder cover 5 is fixed on outrigger arm 1, and piston rod 2 is installed on the inner chamber of oil cylinder cover 5, and it is outer and be slidably matched with cylinder barrel 3 that oil cylinder cover 5 is enclosed within cylinder barrel 3.When operation, piston rod 2 is all the time in oil cylinder cover 5, thus avoids piston rod 2 surface exposed impaired, improves the working life of supporting leg.

On the basis of technique scheme, outrigger arm 1, cylinder force distortion during work, it is larger that cylinder barrel 3 and oil cylinder overlap 5 binding site moments of flexure, oil cylinder cover 5 coordinates with cylinder barrel 3 can ensure that cylinder barrel bears moment of flexure, thus increase the bearing capacity of oil cylinder, and reduce the risk that piston rod 2 is out of shape fracture, improve operational security.

Also can be provided with rubber sleeve 6 as shown in Figure 4 at the inwall of oil cylinder cover 5, the inwall of this rubber sleeve 6 and the outer wall of cylinder barrel 3 are slidably matched.This rubber sleeve 6 can play the leading role guiding cylinder barrel 3 relative to piston rod 2 telescopic moving, can play the effect reducing friction in addition.

Piston rod 2 can be fixed on oil cylinder cover 5, and preferably this piston rod 2 has certain activity at above-below direction.As shown in Figure 3, piston rod 2 is provided with step, oil cylinder cover 5 is provided with the limiting board 7 coordinated with step, and the lower surface of this limiting board 7 coordinates with the step surface on piston rod 2, moves up for limited piston bar 2; In addition, piston rod 2 is also provided with groove, this limiting board 7 is also arranged and groove fit clamp 8, moves down for limited piston bar 2.Can be integrally formed between clamp 8 and limiting board 7, preferred clamp 8 is fixed on limiting board 7 by bolt 9.Should be clear, this clamp 8 also can adopt as other possibility structures such as bearing pin replace.

In order to play leading role to cylinder barrel 3 further, the inwall of preferred cylinder barrel 3 is provided with the guide sleeve 4 shown in Fig. 4, and the inwall of this guide sleeve 4 and the outer wall of piston rod 2 are slidably matched.This guide sleeve 4 can be connected with bolt with cylinder barrel 3, is convenient to the dismounting of piston rod 2.

Except the supporting leg of previous embodiment, the utility model also provides a kind of engineering machinery being provided with previous embodiment supporting leg.This project machinery can be the equipment as the use such as truck crane, concrete mixer supporting leg.Be preferably concrete mixer, impact endurance test shock larger during to meet its work is to the requirement of support bearing ability.

These are only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (10)

1. an oil cylinder, comprise piston rod (2) and cylinder barrel (3), described cylinder barrel (3) can relative to described piston rod (2) telescopic moving, it is characterized in that, also comprise the relatively-stationary oil cylinder cover (5) with described piston rod, described oil cylinder cover (5) is enclosed within described cylinder barrel (3) and be slidably matched with described cylinder barrel (3) outward.

2. oil cylinder according to claim 1, is characterized in that, the inwall of described oil cylinder cover (5) is provided with rubber sleeve (6), and the inwall of described rubber sleeve (6) and the outer wall of described cylinder barrel (3) are slidably matched.

3. oil cylinder according to claim 1, is characterized in that, (2) are provided with step to described piston rod, described oil cylinder cover (5) is provided with the limiting board (7) coordinated with described step.

4. oil cylinder according to claim 3, is characterized in that, (2) are provided with groove to described piston rod, described limiting board (7) is also provided with and the clamp of described groove fit (8).

5. oil cylinder according to claim 4, is characterized in that, described clamp (8) is fixed on described limiting board (7) by bolt (9).

6. the oil cylinder according to any one of claim 1-5, it is characterized in that, the inwall of described cylinder barrel (3) is provided with guide sleeve (4), and the inwall of described guide sleeve (4) and the outer wall of described piston rod (2) are slidably matched.

7. a supporting leg, comprise outrigger arm (1), it is characterized in that, also comprise the oil cylinder described in any one of claim 1-6, described piston rod (2) is positioned at upper end, described cylinder barrel (3) is positioned at lower end, and the upper end of described oil cylinder cover (5) and piston rod (2) is fixed on described outrigger arm (1).

8. supporting leg according to claim 7, it is characterized in that, the bottom of described cylinder barrel (3) is fixed with bulb (10), described supporting leg also comprises supporting leg dish (11), described supporting leg dish (11) is provided with the ball-and-socket coordinated with described bulb (10).

9. an engineering machinery, is characterized in that, described engineering machinery is provided with the oil cylinder described in any one of claim 1-6, or the supporting leg described in claim 7 or 8.

10. engineering machinery according to claim 9, is characterized in that, described engineering machinery is specially concrete mixer.