CN217055788U

CN217055788U - Supporting leg oil cylinder and operation machine

Info

Publication number: CN217055788U
Application number: CN202220683844.0U
Authority: CN
Inventors: 何俊峰; 王燕林; 张贻铁
Original assignee: Loudi Zhongxing Hydraulic Parts Co Ltd
Current assignee: Loudi Zhongxing Hydraulic Parts Co Ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-07-26
Anticipated expiration: 2032-03-24

Abstract

The utility model relates to an operation machinery technical field provides a landing leg hydro-cylinder and operation machinery. Wherein, the landing leg hydro-cylinder includes: a cylinder body; the piston rod assembly is in sliding fit with the cylinder body and can stretch out and draw back from the first end of the cylinder body; the first cylinder component is sleeved on the outer side of the cylinder body and connected with the cylinder body; the first end of the second cylinder component is slidably sleeved with the first cylinder component, and the second end of the second cylinder component is connected with the piston rod assembly; the side wall of the first cylinder component is provided with an oil pipe hole for the oil supply pipe to go in and out, and the position of the second cylinder component opposite to the oil pipe hole is provided with an avoidance groove extending along the axial direction of the cylinder body. After the piston rod assembly stretches out, the piston rod assembly is sealed in the space that first barrel component and second barrel component enclose to can prevent the pollutant adhesion in the piston rod assembly, and then the seal structure of protection landing leg hydro-cylinder can not destroyed by the pollutant, can also avoid hard things such as grit to strike and destroy the piston rod, thereby prolong the life of landing leg hydro-cylinder.

Description

Supporting leg oil cylinder and operation machine

Technical Field

The utility model relates to an operating machine technical field especially relates to a landing leg hydro-cylinder and operating machine.

Background

Work machines, such as pump trucks and cranes, are often provided with a leg mechanism. The supporting leg mechanism comprises a cross arm and a supporting leg oil cylinder. The cross arm is connected with the vehicle body of the working machine in a sliding or rotating mode so as to fold or unfold. The supporting leg oil cylinder is connected with the cross arm and used for supporting the vehicle body.

Because the operating machinery often works in a severe environment, the piston rod of the supporting leg oil cylinder is supported on the ground for a long time, pollutants such as sand, dust, slurry and the like are easy to solidify on the piston rod, and when the piston rod contracts, the solidified pollutants are easy to damage the sealing structure, so that the oil leakage of the supporting leg oil cylinder is caused.

Therefore, how to solve the defect that the contaminants are easily fixed on the piston rod of the leg cylinder in the prior art is a technical problem that needs to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a landing leg hydro-cylinder and operation machinery for solve among the prior art pollutant and solidify in the defect of landing leg hydro-cylinder easily, realize the not destroyed effect of seal structure of protection landing leg hydro-cylinder.

The utility model provides a landing leg hydro-cylinder, include:

the first end of the cylinder body is provided with a guide sleeve;

a piston rod assembly slidably engaged with the cylinder body and capable of extending and retracting from the guide sleeve;

the first cylinder component is sleeved on the outer side of the cylinder body and connected with the cylinder body;

the first end of the second cylinder component is slidably sleeved with the first cylinder component, and the second end of the second cylinder component is connected with the piston rod assembly;

the side wall of the first cylinder component is provided with an oil pipe hole for the oil supply pipe to go in and out, and the position of the second cylinder component opposite to the oil pipe hole is provided with an avoidance groove extending along the axial direction of the cylinder body.

According to the utility model, the piston rod assembly is provided with a limiting block which is used for abutting against the outer end face of the guide sleeve;

and the cylinder body is axially lengthened so that the limiting block is abutted against the outer end face of the guide sleeve, and a preset distance is reserved between the piston end of the piston rod assembly and the inner end face of the second end of the cylinder body.

According to the utility model provides a landing leg oil cylinder, which also comprises a sealing element;

the sealing element is connected with the second barrel component and blocks the avoidance groove.

According to the utility model provides a pair of landing leg hydro-cylinder, the sealing member sets up to sealed the pad.

According to the utility model provides a pair of landing leg hydro-cylinder, the sealing member sets up to the brush strip.

According to the utility model, the supporting leg oil cylinder also comprises a mounting seat;

the mounting seat is connected with the outer circumferential surface of the cylinder body;

the first barrel member is connected to the mount.

According to the utility model provides a pair of landing leg hydro-cylinder, second barrel component with the stopper is connected.

According to the utility model provides a landing leg oil cylinder, which also comprises a connecting seat connected with a cross arm;

the connecting seat is connected with the outer circumferential surface of the cylinder body.

According to the utility model provides a landing leg hydro-cylinder, the piston rod subassembly includes piston, piston rod and bulb;

the piston is slidably arranged on the cylinder body;

the first end of the piston rod is connected with the piston, and the second end of the piston rod is connected with the ball head.

The utility model also provides an operating machine, which comprises a cross arm and the supporting leg oil cylinder;

the first end of the cross arm is movably connected with the vehicle body of the working machine, and the second end of the cross arm is connected with the cylinder body of the supporting leg oil cylinder.

The utility model provides a landing leg hydro-cylinder, through setting up first barrel component and second barrel component, when piston rod assembly stretches out, second barrel component moves along with piston rod assembly simultaneous movement to stretch out for first barrel component. The oil pipe hole on the first cylinder component can be used for the oil pipe of the supporting leg oil cylinder to pass through, and the avoidance groove on the second cylinder component can ensure that the second cylinder component does not interfere with the oil pipe in the process of moving along with the piston rod component.

After the piston rod assembly stretches out, the piston rod assembly is sealed in the space surrounded by the first cylinder component and the second cylinder component, so that pollutants can be prevented from being adhered to the piston rod assembly, and the sealing structure of the supporting leg oil cylinder can be protected from being damaged by the pollutants. Simultaneously, the piston rod subassembly is sealed in the space that first barrel component and second barrel component enclose, can also avoid hard things such as grit to strike and destroy the piston rod to the life of extension landing leg hydro-cylinder.

Further, the utility model provides a working machine owing to contained foretell landing leg hydro-cylinder, has consequently just also contained all advantages of the above-mentioned of landing leg hydro-cylinder simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a leg cylinder provided in an embodiment of the present invention;

fig. 2 is a schematic structural view of a second barrel member provided in an embodiment of the present invention;

FIG. 3 is a schematic illustration of a leg of a prior art work machine;

fig. 4 is a schematic view of a usage status of the oil cylinder leg provided in the embodiment of the present invention.

Reference numerals are as follows:

1. a cylinder barrel; 2. a first barrel member; 3. a second cylinder member; 4. an oil pipe hole; 5. an avoidance groove; 6. a limiting block; 7. a seal member; 8. a mounting base; 9. a connecting seat; 10. a piston; 11. a piston rod; 12. a ball head; 13. a cross arm; 14. a sleeve; 15. a rod cavity nozzle tip; 16. a support oil cylinder; 17. a cylinder bottom; 18. a guide sleeve.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The following describes the leg cylinder 16 provided in the embodiment of the present invention with reference to fig. 1 to 4.

Specifically, the leg cylinder 16 includes a cylinder body, a piston rod assembly, a first cylinder member 2, and a second cylinder member 3.

Wherein optionally the cylinder block comprises a cylinder barrel 1, a cylinder bottom 17 and a guide sleeve 18. The cylinder barrel 1 is of a barrel structure, the guide sleeve 18 is arranged at a first end of the cylinder barrel 1, and the cylinder bottom 17 is arranged at a second end of the cylinder barrel 1.

The piston rod assembly is a sliding fit with the cylinder block and is capable of extending and retracting from the guide sleeve 18.

Optionally, the piston rod assembly comprises a piston 10, a piston rod 11 and a ball head 12. The piston 10 is slidably disposed in the cylinder 1, a first end of the piston rod 11 is connected to the piston 10, and a second end of the piston rod 11 passes through the guide sleeve 18 and is connected to the ball 12.

The first cylinder member 2 is fitted to the outside of the cylinder body and connected to the cylinder body.

The first end of the second barrel member 3 is slidably received with the first barrel member 2. For example, as shown in fig. 1, the first end of the second cylindrical member 3 is slidably fitted into the first cylindrical member 2, but the first end of the second cylindrical member 3 may be slidably fitted into the first cylindrical member 2. The second end of the second barrel member 3 is connected to the piston rod assembly. For example, as shown in fig. 1, the second barrel member 3 may be connected with the ball head 12.

The side wall of the first cylindrical member 2 is provided with an oil pipe hole 4 for feeding and discharging an oil pipe. For example, the oil pipe hole 4 is opposed to the rod chamber nipple 15 of the cylinder body. Referring to fig. 2, the second cylindrical member 3 is provided with an escape groove 5 extending in the axial direction of the cylinder body at a position opposite to the oil pipe hole 4.

Referring to fig. 1, in the embodiment of the present invention, by providing the first cylinder member 2 and the second cylinder member 3, when the piston rod assembly extends, the second cylinder member 3 moves simultaneously with the piston rod assembly and extends relative to the first cylinder member 2. The oil pipe hole 4 on the first cylinder component 2 can be used for the oil pipe of the supporting leg oil cylinder 16 to pass through, and the avoidance groove 5 on the second cylinder component 3 can ensure that the second cylinder component 3 can not generate interference with the oil pipe in the process of moving along with the piston rod assembly.

After the piston rod assembly extends out, the piston rod assembly is sealed in a space surrounded by the first cylinder component 2 and the second cylinder component 3, so that pollutants can be prevented from being adhered to the piston rod assembly, and the sealing structure of the supporting leg oil cylinder 16 can be protected from being damaged by the pollutants. Simultaneously, the piston rod assembly is sealed in the space that first barrel component 2 and second barrel component 3 enclose, can also avoid hard things such as grit to strike and destroy piston rod 11 to extension landing leg hydro-cylinder 16's life.

Further, the stroke of the second cylinder member 3 running along the first cylinder member 2 should be larger than or equal to the stroke of the piston rod assembly, so that the piston rod assembly can be located in the space enclosed by the first cylinder member 2 and the second cylinder member 3, regardless of the position.

Referring to fig. 3, in the prior art, the crossbars 13 of the leg mechanisms on both sides of some working machines, such as pump trucks, are usually arranged crosswise, which results in different heights of the two crossbars 13 from the ground. Since the specifications of each support oil cylinder 16 are generally the same, the sleeve 14 needs to be added to the crossbar 13 which is higher than the ground to ensure that the distance between each support oil cylinder 16 and the ground is the same. In this way, the cross arm 13 is complex in structure and high in processing cost, and the leg cylinder 16 is connected with the cross arm 13 through the sleeve 14, which is inferior in connection strength and rigidity, compared with the way of directly connecting with the cross arm 13.

In order to solve the technical problem, referring to fig. 1 and 4, in some embodiments of the present invention, the piston rod assembly is provided with a stopper 6 for abutting against an outer end surface of the guide sleeve 18, so that the guide sleeve 18 positions a retraction position of the piston rod assembly. For example, the stopper 6 and the ball head 12 are integrally formed.

Further, referring to fig. 1, the cylinder body is configured as an axially elongated cylinder body, so that a predetermined distance is provided between the piston end of the piston rod assembly and the inner end surface of the second end of the cylinder body in a state where the stopper 6 abuts against the outer end surface of the guide sleeve 18. In actual use, the preset distance may be determined according to a height difference between the cross arms 13 with different heights from the ground, that is, the preset distance is greater than or equal to the height difference.

With reference to fig. 4, with such an arrangement, the length of the cylinder body can be increased without changing the stroke of the leg cylinder 16, so as to increase the installation length of the leg cylinder 16, and thus each crossbar 13 of the work machine can be directly connected to the cylinder body of the leg cylinder 16 without providing the sleeve 14, under the condition that the height of each leg cylinder 16 from the ground is the same, thereby simplifying the structure of the crossbar 13 and improving the connection strength between the leg cylinder 16 and the crossbar 13.

Simultaneously, be equipped with stopper 6 on the piston rod subassembly, it is different to advance line location through cylinder bottom 17 to piston or piston rod when returning with ordinary hydro-cylinder, the utility model provides an embodiment in landing leg hydro-cylinder 16 when returning back, the outer terminal surface through stopper 6 and uide bushing 18 offsets and advances line location to prevent the piston rod subassembly excessive contraction.

Referring to fig. 2, in some embodiments provided by the present disclosure, the leg cylinder 16 further includes a seal 7.

The seal 7 is connected to the second cylindrical member 3 and seals the escape groove 5.

With this arrangement, after the second cylindrical member 3 is extended relative to the first cylindrical member 2, the sealing member 7 can seal the escape groove 5, thereby preventing contaminants from entering the space enclosed by the first cylindrical member 2 and the second cylindrical member 3 from the escape groove 5 and adhering to the surface of the piston rod 11.

In some embodiments of the present invention, the sealing member 7 is provided as a sealing gasket. The gasket may be provided as a rubber pad.

So set up, second barrel component 3 is at the removal in-process, and oil pipe can drive sealed the pad and warp to make sealed pad can carry out the relative displacement with second barrel component 3 not restriction hydro-cylinder under the prerequisite of shutoff to dodging groove 5.

Alternatively, the number of the packing may be set to one, and the packing is disposed at one side of the escape groove 5 and covers the escape groove 5. Of course, the number of the sealing gaskets may also be two, and the two sealing gaskets are respectively disposed on two sides of the avoidance groove 5 and jointly seal the avoidance groove 5.

Of course, the sealing element 7 is not limited to the above-described form of a sealing gasket, for example, as shown with reference to fig. 2, and in other embodiments of the present invention, the sealing element 7 is provided as a brush strip.

So configured, the brush bar is also able to seal the avoidance groove 5 without restricting relative displacement between the oil pipe and the second barrel member 3.

Alternatively, the number of the brush bars may be set to one, the brush bars being disposed at one side of the escape groove 5 and covering the escape groove 5. Of course, the number of the brush strips may also be set to two, and the two brush strips are respectively disposed at both sides of the avoidance groove 5 and jointly close the avoidance groove 5.

In some embodiments provided by the present disclosure, the leg cylinder 16 further includes a mounting seat 8.

The mount 8 is connected to the outer circumferential surface of the cylinder body.

Alternatively, the mounting seat 8 may be provided in a ring structure, and the mounting seat 8 is welded to the outer circumferential surface of the cylinder.

The first barrel member 2 is connected to the mounting base 8.

Alternatively, referring to fig. 1, the end of the first barrel member 2 away from the ball head 12 is provided with a flange extending toward the center of the first barrel member 2, and the flange of the first barrel member 2 is connected with the mounting seat 8. For example, the flange of the first barrel member 2 and the mounting seat 8 may be connected by a threaded fastener connection or a welded connection.

Referring to fig. 1, in some embodiments of the present invention, the second barrel member 3 is connected to the stopper 6.

Optionally, one end of the second cylinder member 3 close to the ball 12 is provided with a flange extending to the center of the second cylinder member 3, and the flange of the second cylinder member 3 is connected with the stopper 6. For example, the flange of the second barrel member 3 may be connected to the stopper 6 by a welded connection or a threaded fastener connection.

In some embodiments provided herein, the leg cylinder 16 further includes a connecting seat 9 for connecting with the cross arm 13. The connecting base 9 is connected with the outer circumferential surface of the cylinder body.

So arranged, the supporting leg oil cylinder 16 is convenient to be connected with the cross arm 13.

Referring to fig. 1, the connecting socket 9 may alternatively comprise a sleeve and a flange connected to the sleeve. Wherein, the sleeve is sleeved on the cylinder barrel 1 and can be welded with the cylinder barrel 1. The flange may be provided as an integral structure with the sleeve. The flange may be provided with a through hole through which a screw fastener is inserted to be connected to the cross arm 13 by the screw fastener, or may be connected to the cross arm 13 by welding.

The utility model also provides an operation machine.

Specifically, the work machine includes the cross arm 13 and the leg cylinder 16 as described above.

The first end of the cross arm 13 is movably connected with the vehicle body of the working machine. For example, the first end of the cross arm 13 may be rotatably or slidably connected to the body of the work machine.

The second end of the cross arm 13 is connected with the cylinder body of the support oil cylinder 16.

It should be noted that the work machine includes the leg cylinder 16, and all the advantages of the leg cylinder 16 are also included, and the description is omitted here.

It should also be noted that the work machine of the present invention includes, but is not limited to, a pump truck, a drilling rig, and a crane.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A support oil cylinder is characterized by comprising:

the first end of the cylinder body is provided with a guide sleeve;

a piston rod assembly slidably engaged with the cylinder and capable of extending and retracting from the guide sleeve;

the first end of the second cylinder component is sleeved with the first cylinder component in a sliding manner, and the second end of the second cylinder component is connected with the piston rod assembly;

2. The support oil cylinder as claimed in claim 1, wherein the piston rod assembly is provided with a limit block for abutting against the outer end face of the guide sleeve;

and the cylinder body is an axially lengthened cylinder body, so that a preset distance is arranged between the piston end of the piston rod assembly and the inner end face of the second end of the cylinder body in a state that the limiting block is abutted against the outer end face of the guide sleeve.

3. The leg cylinder of claim 1, further comprising a seal;

the seal is connected with the second barrel member and blocks the avoidance groove.

4. The leg cylinder as claimed in claim 3, wherein the sealing member is provided as a packing.

5. The leg cylinder according to claim 3, wherein the sealing member is provided as a brush bar.

6. The leg cylinder as claimed in claim 1, further comprising a mounting seat;

the first barrel member is connected with the mount.

7. The leg cylinder as claimed in claim 2, wherein the second cylinder member is connected to the stopper.

8. The leg cylinder according to claim 1, further comprising a connecting base for connecting with the cross arm;

9. The leg cylinder according to claim 1, wherein the piston rod assembly comprises a piston, a piston rod and a ball head;

the piston is slidably arranged on the cylinder body;

10. A working machine comprising a boom and a leg cylinder according to any one of claims 1 to 9;

the first end of the cross arm is movably connected with a vehicle body of the working machine, and the second end of the cross arm is connected with the cylinder body of the supporting leg oil cylinder.