CN114215821B - Landing leg hydraulic cylinder with built-in oil way - Google Patents
Landing leg hydraulic cylinder with built-in oil way Download PDFInfo
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- CN114215821B CN114215821B CN202111645006.0A CN202111645006A CN114215821B CN 114215821 B CN114215821 B CN 114215821B CN 202111645006 A CN202111645006 A CN 202111645006A CN 114215821 B CN114215821 B CN 114215821B
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- cylinder
- guide sleeve
- oil duct
- flange
- flange plate
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 238000003466 welding Methods 0.000 abstract description 11
- 238000007789 sealing Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 51
- 238000005553 drilling Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
Abstract
The invention discloses a landing leg hydraulic cylinder with a built-in oil way, and belongs to the technical field of hydraulic cylinders. The guide sleeve comprises a flange plate I and a cylinder I which are integrally formed; the flange plate I is provided with a radial oil passage I, and the rear end surface of the cylinder body I is provided with an axial oil passage I; the cylinder barrel comprises a flange II and a barrel II which are integrally formed; the flange plate II is provided with a radial oil duct II, the front end surface of the cylinder body II is provided with an axial oil duct II, and the inner peripheral surface of the rear part of the cylinder body II is provided with an inclined oil duct II; the guide sleeve body I is matched and sleeved in the cylinder body II, the guide sleeve flange plate I is attached to the end face of the cylinder body II, and the ED is installed in the port of the axial oil duct II on the end face of the cylinder body II. According to the invention, the influence of vibration and oil impact on a welding seam is avoided through the welding-free built-in oil way, the oil leakage risk is avoided, the problem of deformation of the cylinder barrel or the flange when the flange is welded due to limited space allowance is solved, the outer circle of the guide sleeve is in sealing fit with the supporting ring, and the lateral force resistance of the guide sleeve is improved.
Description
Technical Field
The invention relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with a built-in oil way supporting leg.
Background
In recent years, as urban construction continues to be deep, development efforts on underground spaces continue to increase, and demands of full-circle drilling rigs increase. However, the use of Kuang Jiaocha of such devices, often accompanied by vibrations and large lateral forces, is a significant challenge for hydraulic cylinder products, particularly leg cylinders.
The structure of the existing landing leg hydraulic cylinder is shown in fig. 5 and 6, a piston 40 is arranged at the inner end of a piston rod 10, a guide sleeve 20 is arranged at the outer end of a cylinder 30, wherein the outer flange of the cylinder 30 is in a welding mode, an oil pipe is externally welded, and oil pipe joints are formed on the flange of the cylinder 30;
the problems with the above techniques are:
1, the welding space of an external oil pipe and a flange is small, so that the welding quality is not easy to ensure;
2, oil leakage of the welding seam is easy to occur under the working conditions of high-frequency vibration and oil impact, and the welding seam is a weak point for acceptance when bearing lateral force, so that the service life of the welding seam is influenced;
And 3, the guide sleeve and the cylinder barrel are inconvenient to assemble and disassemble, the guide sleeve and the inner oil duct of the cylinder barrel are inconvenient to dock and easy to misplace, and under the action of long-term vibration and unbalanced load force, a large oil leakage risk exists.
Disclosure of Invention
In order to solve the technical problems, the invention provides a landing leg hydraulic cylinder with an internal oil way.
The invention is realized by the following technical scheme: a landing leg hydraulic cylinder with an internal oil way comprises a cylinder barrel and a piston rod which are matched, wherein a guide sleeve is arranged at the front end of the cylinder barrel, and a piston is arranged at the rear end of the piston rod; the guide sleeve comprises a flange plate I and a cylinder I which are integrally formed; the flange plate I is provided with a radial oil passage I, the rear end face of the cylinder body I is provided with an axial oil passage I intersecting with the radial oil passage I, and the rear end of the axial oil passage I is communicated with a rod cavity; the cylinder barrel comprises a flange II and a barrel II which are integrally formed; the flange plate II is provided with a radial oil duct II, the front end face of the cylinder body II is provided with an axial oil duct II intersecting with the radial oil duct II, the inner peripheral surface of the rear part of the cylinder body II is provided with an inclined oil duct II intersecting with the axial oil duct II, and the rear end of the inclined oil duct II is communicated with the rodless cavity; the guide sleeve body I is matched and sleeved in the cylinder barrel body II, the guide sleeve flange plate I is attached to the end face of the cylinder barrel body II, and the ED is installed in the port of the axial oil duct II on the end face of the cylinder barrel body II.
It is further: a flange hole is formed in a flange plate I of the guide sleeve, a threaded hole matched with the flange plate I is formed in the end face of a cylinder body II of the cylinder barrel, and the guide sleeve is connected with the cylinder barrel through a screw.
Two threaded holes are formed in the flange hole graduation circle line on the guide sleeve flange plate I, and the two threaded holes are symmetrical along the axis of the guide sleeve flange plate I.
And a circle of flange holes for connecting with a host machine are formed in the cylinder barrel flange plate II.
Two mounting grooves are formed in the outer peripheral surface of the guide sleeve body I, an O-shaped ring is mounted in the mounting groove close to the rear end of the guide sleeve body I, and a supporting ring is mounted in the mounting groove far away from the rear end of the guide sleeve body I.
The cylinder barrel also comprises a cylinder bottom, and the rear end of the cylinder body II is welded with the cylinder bottom.
And the piston rod is sleeved with a spacer bush.
Compared with the prior art, the invention has the beneficial effects that:
1. The influence of vibration and oil impact on a welding line is eliminated through a built-in oil way without welding, so that the lateral force resistance of the hydraulic cylinder can be improved; the ED plug is arranged to replace a welding process plug, so that the reliability of a product is improved, and the guide sleeve and the cylinder barrel are independently provided with a rod cavity oil duct and a rodless cavity oil duct, so that the risk of oil leakage is avoided;
2. The inclined oil duct II reduces instant pressure impact, is easy to clean burrs and avoids the situation that the burrs and the burrs generated by drilling straight holes cannot be cleaned and enter a hydraulic system to damage sealing;
3. The flange and the cylinder body are used as an integral piece, so that the deformation of the cylinder barrel or the flange when the flange is welded due to limited space allowance is avoided, the coaxiality is ensured, the outer circle of the guide sleeve is matched with the supporting ring in a sealing manner, and the lateral force resistance of the guide sleeve is improved;
4. The outer flange hole of the guide sleeve is reserved with a disassembly and assembly threaded hole, and screws can be screwed in during disassembly and assembly to separate the guide sleeve from the cylinder barrel, so that the aim of ejecting the guide sleeve is fulfilled, and the convenience in disassembly, assembly and maintenance is improved.
Drawings
FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a left side view of an embodiment of the present invention
FIG. 3 is a front view of the guide sleeve;
FIG. 4 is a left side view of the guide sleeve;
in the figure: 1. a piston rod; 2. a guide sleeve; 2-1, a flange I; 2-2, a cylinder I; 2-3, radial oil duct I; 2-4, an axial oil duct I; 2-5, threaded holes; 3. a cylinder; 3-1, a flange II; 3-2, a cylinder II; 3-3, a radial oil duct II; 3-4, an axial oil duct II; 3-5, an inclined oil duct II; 3-6, cylinder bottom; 4. a spacer bush; 5. a piston; 6. ED is blocked; 7. an O-ring; 8. a support ring;
FIG. 5 is a front view of a prior art leg cylinder
Fig. 6 is a left side view of a prior art leg cylinder.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The hydraulic cylinder with the built-in oil way supporting legs is shown in combination with fig. 1 to 4, and comprises a cylinder barrel 3 and a piston rod 1 which are matched, wherein a guide sleeve 2 is arranged at the front end of the cylinder barrel 3, and a piston 5 is arranged at the rear end of the piston rod 1. The piston rod 1 is sleeved with a spacer bush 4.
The guide sleeve 2 comprises a flange I2-1 and a cylinder I2-2 which are integrally formed, a radial oil passage I2-3 is formed in the flange I2-1, an axial oil passage I2-4 intersecting with the radial oil passage I2-3 is formed in the rear end face of the cylinder I2-2, and the rear end of the axial oil passage I2-4 is communicated with the rod cavity. The flange plate I2-1 of the guide sleeve 2 is provided with a flange hole, the index circle line of the flange hole on the flange plate I2-1 is provided with two threaded holes 2-5, and the two threaded holes 2-5 are symmetrical along the axis of the flange plate I2-1 of the guide sleeve 2, so that the oil cylinder can be conveniently disassembled and assembled.
The cylinder barrel 3 comprises a flange plate II 3-1, a barrel II 3-2 and a cylinder bottom 3-6 which are integrally formed, and the rear end of the barrel II 3-2 is welded with the cylinder bottom 3-6. The flange plate II 3-1 is provided with a radial oil duct II 3-3, the front end face of the cylinder body II 3-2 is provided with an axial oil duct II 3-4 intersected with the radial oil duct II 3-3, the inner peripheral surface of the rear part of the cylinder body II 3-2 is provided with an inclined oil duct II 3-5 intersected with the axial oil duct II 3-4, and the rear end of the inclined oil duct II 3-5 is communicated with the rodless cavity. The inclined oil duct II 3-5 is designed, so that on one hand, the inclined hole is convenient to process, a drill bit can be directly drilled from the inner side of the cylinder II 3-2, and on the other hand, the inclined hole can reduce the impact of oil on the cylinder, and hydraulic oil is introduced into gun drilling holes between cylinder walls.
The guide sleeve 2 cylinder I2-2 is matched and sleeved in the cylinder barrel 3 cylinder II 3-2, and the guide sleeve 2 flange I2-1 is attached to the end face of the cylinder barrel 3 cylinder barrel II 3-2. A circle of flange holes for connecting with a host machine are formed in the flange plate II 3-1 of the cylinder barrel 3. The end face of a cylinder body II 3-2 of the cylinder barrel 3 is provided with a threaded hole matched with the flange plate I2-1, and the guide sleeve 2 is connected with the cylinder barrel 3 through a screw. Threads and counter bores are reserved in the ports of the axial oil channels II 3-4 on the end face of the cylinder II 3-2, ED plugs 6 with corresponding specifications are completely screwed into the counter bores, effective oil sealing can be realized, and the ED plugs can be directly replaced if problems occur, so that the maintenance is convenient.
Two mounting grooves are formed in the outer peripheral surface of the cylinder I2-2 of the guide sleeve 2, an O-shaped ring 7 is mounted in the mounting groove close to the rear end of the cylinder I2-2, and a supporting ring 8 is mounted in the mounting groove far away from the rear end of the cylinder I2-2, so that the lateral force resistance of the guide sleeve is improved.
In the cylinder barrel structure, the situation that the cylinder barrel and the flange are deformed due to limited weld space and secondary processing is needed is avoided, the lateral force born by a piston rod can be reduced, and the lateral force resistance of the hydraulic cylinder is improved; the guide sleeve and the cylinder barrel are independently provided with a rodless cavity oil duct, so that the risk of oil leakage is avoided. The embodiment is mainly suitable for the full rotary drilling machine, avoids the adverse effect of vibration on welding seams, and has the advantages of high reliability, lateral force resistance and easiness in maintenance.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Claims (7)
1. The hydraulic cylinder with the built-in oil way supporting legs comprises a cylinder barrel (3) and a piston rod (1) which are matched, wherein a guide sleeve (2) is arranged at the front end of the cylinder barrel (3), and a piston (5) is arranged at the rear end of the piston rod (1);
The method is characterized in that:
The guide sleeve (2) comprises a flange plate I (2-1) and a cylinder body I (2-2) which are integrally formed; the flange plate I (2-1) is provided with a radial oil duct I (2-3), the rear end surface of the cylinder body I (2-2) is provided with an axial oil duct I (2-4) intersecting with the radial oil duct I (2-3), and the rear end of the axial oil duct I (2-4) is communicated with the rod cavity;
The cylinder barrel (3) comprises a flange II (3-1) and a barrel II (3-2) which are integrally formed; the flange plate II (3-1) is provided with a radial oil duct II (3-3), the front end surface of the cylinder body II (3-2) is provided with an axial oil duct II (3-4) intersected with the radial oil duct II (3-3), the inner peripheral surface of the rear part of the cylinder body II (3-2) is provided with an inclined oil duct II (3-5) intersected with the axial oil duct II (3-4), and the rear end of the inclined oil duct II (3-5) is communicated with the rodless cavity;
The guide sleeve (2) cylinder I (2-2) is sleeved in the cylinder II (3-2) of the cylinder (3) in a matched mode, the flange I (2-1) of the guide sleeve (2) is attached to the end face of the cylinder II (3-2) of the cylinder (3), and the ED plug (6) is arranged in the port of the axial oil duct II (3-4) of the end face of the cylinder II (3-2).
2. The hydraulic cylinder with built-in oil way supporting legs according to claim 1, wherein: a flange hole is formed in a flange plate I (2-1) of the guide sleeve (2), a threaded hole matched with the flange plate I (2-1) is formed in the end face of a cylinder body II (3-2) of the cylinder barrel (3), and the guide sleeve (2) is connected with the cylinder barrel (3) through a screw.
3. The hydraulic cylinder with built-in oil way supporting legs according to claim 2, wherein: two threaded holes (2-5) are formed in the flange hole indexing circle line on the flange plate I (2-1) of the guide sleeve (2), and the two threaded holes (2-5) are symmetrical along the axis of the flange plate I (2-1) of the guide sleeve (2).
4. The hydraulic cylinder with built-in oil way supporting legs according to claim 1, wherein: a circle of flange holes for connection with a host are formed in the flange plate II (3-1) of the cylinder barrel (3).
5. The hydraulic cylinder with built-in oil way supporting legs according to claim 1, wherein: two mounting grooves are formed in the outer peripheral surface of the cylinder body I (2-2) of the guide sleeve (2), an O-shaped ring (7) is mounted in the mounting groove close to the rear end of the cylinder body I (2-2), and a supporting ring (8) is mounted in the mounting groove far away from the rear end of the cylinder body I (2-2).
6. The hydraulic cylinder with built-in oil way supporting legs according to claim 1, wherein: the cylinder barrel (3) further comprises a cylinder bottom (3-6), and the rear end of the cylinder body II (3-2) is welded with the cylinder bottom (3-6).
7. The hydraulic cylinder with built-in oil way supporting legs according to claim 1, wherein: the piston rod (1) is sleeved with a spacer bush (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111645006.0A CN114215821B (en) | 2021-12-30 | Landing leg hydraulic cylinder with built-in oil way |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111645006.0A CN114215821B (en) | 2021-12-30 | Landing leg hydraulic cylinder with built-in oil way |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114215821A CN114215821A (en) | 2022-03-22 |
| CN114215821B true CN114215821B (en) | 2024-06-25 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201953355U (en) * | 2011-01-21 | 2011-08-31 | 钱雪松 | Sleeved oil well balancer |
| CN203230648U (en) * | 2013-03-23 | 2013-10-09 | 山东德方液压机械股份有限公司 | Hydraulic support oil cylinder |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201953355U (en) * | 2011-01-21 | 2011-08-31 | 钱雪松 | Sleeved oil well balancer |
| CN203230648U (en) * | 2013-03-23 | 2013-10-09 | 山东德方液压机械股份有限公司 | Hydraulic support oil cylinder |
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