CN114046285A

CN114046285A - Hydraulic oil cylinder

Info

Publication number: CN114046285A
Application number: CN202111196306.5A
Authority: CN
Inventors: 吴攀峰; 肖志洲; 孙欢; 付宏孝
Original assignee: Wuhan Marine Machinery Plant Co Ltd
Current assignee: Wuhan Marine Machinery Plant Co Ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-02-15

Abstract

The disclosure provides a hydraulic oil cylinder, and belongs to the field of mechanical equipment. The hydraulic oil cylinder comprises a cylinder body, a rotor and a piston structure; the rotor is rotatably positioned in the cylinder body, a first oil cavity and a second oil cavity which are mutually isolated are formed between the outer peripheral wall of the rotor and the inner peripheral wall of the cylinder body, and the rotating axis of the rotor is parallel to the central axis of the cylinder body; the piston structure is movably located in the rotor, the outer peripheral wall of the piston structure is in sliding contact with the inner peripheral wall of the rotor, so that the inner space of the rotor is divided into a third oil cavity and a fourth oil cavity, and the moving direction of the piston structure is the same as the direction of the central axis of the cylinder body. This openly passes through hydraulic cylinder, can make the hydro-cylinder body swing.

Description

Hydraulic oil cylinder

Technical Field

The disclosure belongs to the field of mechanical equipment, and particularly relates to a hydraulic oil cylinder.

Background

The hydraulic oil cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy to enable the piston rod to do linear reciprocating motion or swinging motion. In the detection process of a large or heavy test platform, the hydraulic oil cylinder plays a significant role.

In the related art, according to the difference of the above-mentioned motion modes, the hydraulic cylinder is divided into two types, one type is a hydraulic linear cylinder, a piston rod of which makes a linear reciprocating motion, and the other type is a hydraulic tilt cylinder, a piston rod of which makes a swinging motion.

However, in some specific use environments, the piston rod of the hydraulic oil cylinder is required to do linear reciprocating motion and swing motion, and the two hydraulic oil cylinders cannot meet the requirements.

Disclosure of Invention

The embodiment of the disclosure provides a hydraulic oil cylinder, which can enable the hydraulic oil cylinder to output linear motion and torque. The technical scheme is as follows:

the embodiment of the disclosure provides a hydraulic oil cylinder, which comprises a cylinder body, a rotor and a piston structure;

the rotor is rotatably positioned in the cylinder body, a first oil cavity and a second oil cavity which are mutually isolated are formed between the outer peripheral wall of the rotor and the inner peripheral wall of the cylinder body, and the rotating axis of the rotor is parallel to the central axis of the cylinder body;

the piston structure is movably located in the rotor, the outer peripheral wall of the piston structure is in sliding contact with the inner peripheral wall of the rotor, so that the inner space of the rotor is divided into a third oil cavity and a fourth oil cavity, and the moving direction of the piston structure is the same as the direction of the central axis of the cylinder body.

In another implementation of the present disclosure, the rotor includes a rotating sleeve and a rotating blade;

the rotating blades are connected with the outer peripheral wall of the rotating sleeve, and the length direction of the rotating blades is the same as the direction of the central axis of the rotating sleeve;

the cylinder body comprises a cylinder sleeve and fixed blades;

the fixed blades are connected with the inner peripheral wall of the cylinder sleeve, and the length direction of the fixed blades is the same as that of the rotating blades;

the cylinder sleeve is coaxially sleeved outside the rotating sleeve, a first oil cavity is defined and formed among one side of the fixed blade, one side of the rotating blade, the outer peripheral wall of the rotating sleeve and the inner peripheral wall of the cylinder sleeve, and a second oil cavity is defined and formed among the other side of the fixed blade, the other side of the rotating blade, the outer peripheral wall of the rotating sleeve and the inner peripheral wall of the cylinder sleeve.

In another implementation of the present disclosure, the outer peripheral wall of the rotating sleeve has an outer flange in the middle;

the rotor blade is connected to the outer flange and extends from a first end of the outer flange to a second end of the outer flange;

the cylinder sleeve comprises a body and two end covers;

the two end covers are respectively connected with two ends of the body, one of the two end covers is in sealing butt joint with the first end face of the outer flange, and the other of the two end covers is in sealing butt joint with the second end face of the outer flange;

the inner peripheral wall of the body is connected with the fixed blades, and the body is sleeved outside the rotating sleeve.

In another implementation of the present disclosure, the sidewall of the body has a first oil delivery port and a second oil delivery port;

the first oil delivery port is communicated with the first oil cavity;

the second oil delivery port is communicated with the second oil cavity.

In another implementation of the present disclosure, the end cap includes a sealing ring and a connecting ring;

the sealing ring is positioned between the connecting ring and the end surface of the outer flange and is connected with the connecting ring;

the connecting ring is connected with the end of the body.

In another implementation of the present disclosure, the rotor blade has a rotor seal groove along its length;

the rotor further comprises a rotating sealing rubber strip, the rotating sealing rubber strip is located in the rotating sealing groove, and the rotating sealing rubber strip is in contact with the inner peripheral wall of the cylinder sleeve.

In another implementation of the present disclosure, the fixed blade has a fixed seal groove along its length direction;

the cylinder body still includes fixed joint strip, fixed joint strip is located fixed seal groove, fixed joint strip with the periphery wall contact of rotating the cover.

In another implementation of the present disclosure, the piston structure includes a piston rod and a piston;

the piston rod is inserted in the piston, and two ends of the piston rod protrude out of the piston;

the rotating sleeve comprises a sleeve body and two cover plates, and the two cover plates are respectively sealed and covered at two ends of the sleeve body;

the first end of the piston rod is hermetically inserted into one of the two cover plates, the second end of the piston rod is hermetically inserted into the other of the two cover plates, the piston is movably positioned in the sleeve body, and the outer peripheral wall of the piston is in sliding sealing contact with the inner peripheral wall of the sleeve body;

the third oil chamber is defined and formed between one side of the piston, one of the two cover plates and the inner peripheral wall of the sleeve body, and the fourth oil chamber is defined and formed between the other side of the piston, the other of the two cover plates and the inner peripheral wall of the sleeve body.

In another implementation manner of the disclosure, the piston rod is internally provided with a first oil passage and a second oil passage which are isolated from each other along the axis direction of the piston rod;

the first oil duct and the second oil duct are respectively located on two sides of the piston, two ends of the first oil duct are respectively communicated with the third oil cavity and the outside, and two ends of the second oil duct are respectively communicated with the fourth oil cavity and the outside.

In another implementation of the present disclosure, the piston structure further comprises at least one piston seal ring;

at least one the piston sealing washer cup joints the periphery wall of piston, just the piston sealing washer with the internal perisporium sliding contact of cover body.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:

when the hydraulic oil cylinder provided by the embodiment of the disclosure is used, the hydraulic oil cylinder comprises a cylinder body, a rotor and a piston structure, the rotor is rotatably positioned in the cylinder body, and the piston structure is movably positioned in the rotor, so that high-pressure hydraulic oil can be input into a first oil cavity or a second oil cavity, the rotor is driven to rotate relative to the cylinder body, and meanwhile, high-pressure hydraulic oil can be input into a third oil cavity or a fourth oil cavity, and the piston structure is driven to move relative to the cylinder body, so that the hydraulic oil cylinder can output linear motion and output torque, and specific use requirements are met.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is an exploded view of a hydraulic ram provided by an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of the internal structure of a hydraulic cylinder provided in the disclosed embodiment;

FIG. 3 is an axial cross-sectional view of a hydraulic ram provided by an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a rotor provided by an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a cylinder provided in the embodiment of the present disclosure.

The symbols in the drawings represent the following meanings:

1. a cylinder body; 11. a cylinder liner; 111. a body; 1111. a first oil delivery port; 1112. a second oil delivery port; 112. an end cap; 1121. a seal ring; 1122. a connecting ring; 12. a fixed blade; 121. fixing a sealing groove;

2. a rotor; 201. a first oil chamber; 202. a second oil chamber; 203. a third oil chamber; 204. a fourth oil chamber; 21. rotating the sleeve; 210. an outer flange; 211. a sleeve body; 212. a cover plate; 213. an annular seal ring;

22. a rotor blade; 221. rotating the sealing groove;

3. a piston structure; 31. a piston rod; 311. a first oil passage; 312. a second oil passage; 313. a first through hole; 315. a stopper; 314. a second through hole; 32. a piston; 33. and a piston seal ring.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

The disclosed embodiment provides a hydraulic cylinder, and as shown in fig. 1, the hydraulic cylinder includes a cylinder body 1, a rotor 2 and a piston structure 3.

Fig. 2 is a schematic diagram of the internal structure of a hydraulic cylinder provided in an embodiment of the present disclosure, and in conjunction with fig. 2, a rotor 2 is rotatably located in a cylinder body 1, and a first oil chamber 201 and a second oil chamber 202 isolated from each other are formed between an outer peripheral wall of the rotor 2 and an inner peripheral wall of the cylinder body 1, and a rotation axis of the rotor 2 is parallel to a central axis of the cylinder body 1.

Fig. 3 is an axial cross-sectional view of a hydraulic cylinder provided in an embodiment of the present disclosure, and in conjunction with fig. 3, a piston structure 3 is movably located in a rotor 2, and an outer peripheral wall of the piston structure 3 is in sliding contact with an inner peripheral wall of the rotor 2 to divide an inner space of the rotor 2 into a third oil chamber 203 and a fourth oil chamber 204, and a moving direction of the piston structure 3 is the same as a direction in which a central axis of a cylinder body 1 is located.

When the hydraulic oil cylinder provided by the embodiment of the disclosure is used, the hydraulic oil cylinder comprises a cylinder body 1, a rotor 2 and a piston structure 3, the rotor 2 is rotatably positioned in the cylinder body 1, and the piston structure 3 is movably positioned in the rotor 2, so that hydraulic oil can be input into the first oil cavity 201 or the second oil cavity 202, the rotor 2 is driven to rotate relative to the cylinder body 1, meanwhile, hydraulic oil can be input into the third oil cavity 203 or the fourth oil cavity 204, and the piston structure 3 is driven to move relative to the cylinder body 1, so that the hydraulic oil cylinder can output linear motion and torque, and specific use requirements are met.

Fig. 4 is a schematic structural diagram of a rotor provided in the embodiment of the present disclosure, and in conjunction with fig. 4, the rotor 2 optionally includes a rotating sleeve 21 and a rotating blade 22. The rotor blade 22 is connected to the outer peripheral wall of the rotor sleeve 21, and the length direction of the rotor blade 22 is the same as the direction of the central axis of the rotor sleeve 21.

Fig. 5 is a schematic structural diagram of a cylinder block provided by the embodiment of the disclosure, and in combination with fig. 5, the cylinder block 1 optionally includes a cylinder liner 11 and fixed blades 12. The fixed vane 12 is connected to an inner circumferential wall of the cylinder liner 11, and a longitudinal direction of the fixed vane 12 is the same as a longitudinal direction of the rotor vane 22. The cylinder sleeve 11 is coaxially sleeved outside the rotating sleeve 21.

A first oil chamber 201 is defined between one side of the fixed vane 12, one side of the moving vane 22, the outer peripheral wall of the moving sleeve 21, and the inner peripheral wall of the cylinder liner 11, and a second oil chamber 202 is defined between the other side of the fixed vane 12, the other side of the moving vane 22, the outer peripheral wall of the moving sleeve 21, and the inner peripheral wall of the cylinder liner 11.

In the above implementation, the rotor 2 is provided as the rotating sleeve 21 and the rotating blades 22, while the cylinder block 1 is provided as the cylinder liner 11 and the fixed blades 12, so that the annular space between the rotating sleeve 21 and the cylinder liner 11 can be divided into two independent chambers by the fixed blades 12 and the rotating blades 22 to form the first oil chamber 201 and the second oil chamber 202.

That is, with the above configuration, the annular space between the rotating sleeve 21 and the cylinder liner 11 can be simply formed into the first oil chamber 201 and the second oil chamber 202 which are independent and sealed from each other, so that the hydraulic oil can be input into the first oil chamber 201 or the second oil chamber 202 to drive the rotor 2 to rotate, i.e., the hydraulic oil cylinder can output torque.

Referring again to fig. 4, in the present embodiment, the cross-section of the rotor blade 22 is a fan-ring structure.

In the above implementation manner, the rotor blade 22 is provided as a fan-shaped annular structure member, so that the fitting degree of the inner annular wall of the rotor blade 22 and the outer circumferential wall of the rotating sleeve 21 is high, and meanwhile, the outer annular wall of the rotor blade 22 and the inner circumferential wall of the cylinder liner 11 are in sealing fit together, so as to improve the sealing performance of the rotating first oil chamber 201 or the rotating second oil chamber 202.

In this embodiment, the rotor blade 22 has a rotation seal groove 221 along its length direction, and the rotation seal groove 221 penetrates through both ends of the rotor blade 22.

The rotor 2 further includes a rotating sealing rubber strip (not shown in the figure) which is located in the rotating sealing groove 221 and contacts with the inner peripheral wall of the cylinder liner 11.

In the above implementation, the rotary sealing groove 221 is used for installing a rotary sealing rubber strip, and the rotary sealing rubber strip is used for improving the sealing performance between the rotary vane 22 and the cylinder sleeve 11, thereby improving the sealing performance of the first oil chamber 201 and the second oil chamber 202.

In this embodiment, the rotor blade 22 and the rotating sleeve 21 may be an integrally formed structural member, or may be separate structural members, and if the rotor blade 22 and the rotating sleeve 21 are separate structural members, the rotor blade 22 and the rotating sleeve 21 may be connected together by welding.

With continued reference to fig. 4, the outer peripheral wall of the rotating sleeve 21 may optionally have an outer flange 210 in the middle.

The rotor blades 22 are connected to the outer flange 210, and the rotor blades 22 extend from a first end of the outer flange 210 to a second end of the outer flange 210.

The cylinder liner 11 includes a body 111 and two end caps 112. The two end caps 112 are connected to both ends of the body 111, respectively, one of the two end caps 112 is in sealing contact with the first end face of the outer flange 210, and the other of the two end caps 112 is in sealing contact with the second end face of the outer flange 210. The inner peripheral wall of the body 111 is connected with the fixed blade 12, and the body 111 is sleeved outside the rotating sleeve 21.

In the above implementation, the outer flange 210 is used to abut against the end cover 112 of the cylinder liner 11, so that both ends of the annular space between the rotating sleeve 21 and the cylinder liner 11 can be sealed by the end cover 112, and finally, the first oil chamber 201 and the second oil chamber 202 are ensured not to leak oil.

Referring again to fig. 5, the stationary vanes 12 are optionally fan-ring shaped structures in cross-section.

In the above implementation manner, by the same principle, the fixed vane 12 is set as a fan-shaped annular structural member, so that the fitting degree of the inner annular wall of the fixed vane 12 and the outer circumferential wall of the rotating sleeve 21 is high, and meanwhile, the outer annular wall of the fixed vane 12 and the inner circumferential wall of the cylinder liner 11 are connected together in a fitting manner, thereby improving the sealing performance of the rotating first oil chamber 201 or the rotating second oil chamber 202.

For example, the fixed vane 12 and the cylinder liner 11 may be an integrally formed structural member or a separate structural member, and if the fixed vane 12 and the cylinder liner 11 are separate structural members, the fixed vane 12 and the cylinder liner 11 may be connected together by welding.

With reference to fig. 5, in the present embodiment, the fixed blade 12 has a fixed seal groove 121 along the length direction thereof, and the fixed seal groove 121 penetrates through two ends of the fixed blade 12.

The cylinder body 1 further includes a fixed sealing rubber strip (not shown in the figure) located in the fixed sealing groove 121, and the fixed sealing rubber strip is in contact with the outer peripheral wall of the rotating sleeve 21.

In the above implementation, the fixed joint strip is used to improve the sealing between the fixed blade 12 and the rotating sleeve 21.

Optionally, the sidewall of the body 111 has a first oil delivery port 1111 and a second oil delivery port 1112. The first oil delivery port 1111 communicates with the first oil chamber 201. The second oil delivery port 1112 communicates with the second oil chamber 202.

In the above implementation, the first oil delivery port 1111 is used for inputting external high-pressure hydraulic oil into the first oil chamber 201, and the second oil delivery port 1112 is used for inputting external high-pressure hydraulic oil into the second oil chamber 202, so that the first oil chamber 201 and the second oil chamber 202 have high-pressure hydraulic oil therein, and the rotor 2 is driven to rotate clockwise or counterclockwise.

It is understood that when the first oil chamber 201 is filled with the high-pressure oil, the rotor blade 22 rotates toward the second oil chamber 202, i.e., the rotation direction of the rotor blade 22 is from the side of the rotor blade 22 adjacent to the first oil chamber 201 toward the side of the rotor blade 22 adjacent to the second oil chamber 202.

When the second oil chamber 202 is filled with the high-pressure oil, the rotor blade 22 rotates toward the first oil chamber 201, that is, the rotation direction of the rotor blade 22 is from the side of the rotor blade 22 adjacent to the second oil chamber 202 to the side of the rotor blade 22 adjacent to the first oil chamber 201.

Of course, in actual use, the rotation angle of the rotor 2 can be set according to actual requirements. In use, the rotor blades 22 may be fixed in a certain position in advance, and the maximum rotation angle of the rotor 2 is 360 ° different from the angle between the rotor blades 22 and the fixed blades 12 in the initial position.

Referring again to fig. 3, optionally, end cap 112 includes a sealing ring 1121 and a connecting ring 1122.

The sealing ring 1121 is located between the attachment ring 1122 and the end surface of the outer flange 210, and the sealing ring 1121 and the attachment ring 1122 are connected. The connection ring 1122 is connected to an end of the body 111.

In the above implementation, the sealing ring 1121 is used to seal and cover the first and second oil chambers 201 and 202. The attachment ring 1122 serves to attach the sealing ring 1121 to the cylinder liner 11 so that the sealing ring 1121 does not fall off.

In this embodiment, the seal ring 1121 and the attachment ring 1122 are connected together by a plurality of bolt fasteners, and the attachment ring 1122 and the end portion of the cylinder liner 11 are connected together by a plurality of bolt fasteners.

Optionally, the piston structure 3 comprises a piston rod 31 and a piston 32. The piston rod 31 is inserted in the piston 32, and two ends of the piston rod 31 protrude out of the piston 32, and the axial direction of the piston rod 31 is the same as the direction of the rotation axis of the rotor 2.

Referring again to fig. 2, the rotating sleeve 21 includes a sleeve body 211 and two cover plates 212, the two cover plates 212 are hermetically sealed at two ends of the sleeve body 211 respectively, a first end of the piston rod 31 is hermetically inserted into one of the two cover plates 212, a second end of the piston rod 31 is hermetically inserted into the other one of the two cover plates 212, the piston 32 is movably located inside the sleeve body 211, and an outer circumferential wall of the piston 32 is in sliding sealing contact with an inner circumferential wall of the sleeve body 211.

A third oil chamber 203 is defined between one side of the piston 32, one of the two cover plates 212, and the inner peripheral wall of the case body 211, and a fourth oil chamber 204 is defined between the other side of the piston 32, the other of the two cover plates 212, and the inner peripheral wall of the case body 211.

In the above implementation, the piston rod 31 is used for connecting with an external moving object so as to drive the moving object to perform linear reciprocating motion. The piston 32 is used for partitioning the inside of the case body 211 into the third oil chamber 203 and the fourth oil chamber 204, and the cover plate 212 is used for covering the third oil chamber 203 and the fourth oil chamber 204, so that the piston 32 can be driven to linearly reciprocate by inputting hydraulic oil into the third oil chamber 203 and the fourth oil chamber 204.

That is, with the above configuration of the rotating sleeve 21, both ends of the sleeve body 211 can be sealed by the cover plate 212 while the third oil chamber 203 and the fourth oil chamber 204 are brought into a sealed state by the cover plate 212 in cooperation with the piston rod 31, without allowing the hydraulic oil to leak out to affect the movement of the piston 32.

In this embodiment, an annular seal ring 213 is interposed between the cover plate 212 and the end of the sleeve body 211, and the cover plate 212 and the sleeve body 211 are connected by a bolt fastener.

This makes it possible to simply seal the cover plate 212 to the case body 211, thereby improving the sealing performance of the third oil chamber 203 and the fourth oil chamber 204.

Alternatively, the piston rod 31 has a first oil passage 311 and a second oil passage 312 isolated from each other inside in the direction of its own axis.

The first oil passage 311 and the second oil passage 312 are respectively located on both sides of the piston 32, both ends of the first oil passage 311 are respectively communicated with the third oil chamber 203 and the outside, and both ends of the second oil passage 312 are respectively communicated with the fourth oil chamber 204 and the outside.

In the above-described implementation, the first oil passage 311 is used to communicate the third oil chamber 203 with the outside so as to input hydraulic oil to the inside of the third oil chamber 203. The second oil passage 312 is used to communicate the fourth oil chamber 204 with the outside so as to input hydraulic oil to the inside of the fourth oil chamber 204.

In the present embodiment, the first oil passage 311 extends from the first end of the piston rod 31 toward the second end of the piston rod 31, and the second oil passage 312 extends from the second end of the piston rod 31 toward the first end of the piston rod 31. The first oil passage 311 and the second oil passage 312 do not communicate with each other.

Illustratively, the piston rod 31 is provided with two first through holes 313 near the outer walls of both ends of the first oil passage 311, respectively, and both the two first through holes 313 communicate with the first oil passage 311. One of the two first through holes 313 communicates with the third oil chamber 203, and the other of the two first through holes 313 communicates with a hydraulic joint for the outside.

Illustratively, two second through holes 314 are respectively formed in the outer walls of the piston rod 31 near the two ends of the second oil passage 312, and the two second through holes 314 are both communicated with the second oil passage 312. One of the two second through holes 314 communicates with the fourth oil chamber 204, and the other of the two second through holes 314 communicates with a hydraulic joint for the outside.

In the present embodiment, in order to facilitate machining of the first oil passage 311 and the second oil passage 312, the first oil passage 311 penetrates the first end of the piston rod 31, and the second oil passage 312 penetrates the second end of the piston rod 31.

In use, the first end and the second end of the piston rod 31 are respectively provided with a stopper 315, and the stoppers 315 are used for blocking the two ends of the piston rod 31.

Illustratively, the stopper 315 is connected to the piston rod 31 by means of plug welding.

Optionally, the piston structure 3 further comprises at least one piston sealing ring 33. At least one piston packing 33 is fitted around the outer circumferential wall of the piston 32, and the piston packing 33 is in sliding contact with the inner circumferential wall of the sleeve body 211.

In the above-described implementation, the piston seal 33 is used to improve the sealing performance between the piston 32 and the rotor 2, and further, the sealing performance of the third oil chamber 203 and the fourth oil chamber 204.

The working process of the hydraulic oil cylinder provided by the embodiment of the disclosure is briefly described as follows:

first, the stationary sealant is installed in the stationary seal groove 121 of the stationary blade 12, and the rotary sealant is installed in the rotary seal groove 221 of the rotary blade 22.

Then, the rotor 2 (containing the rotating joint strip) is placed inside the cylinder casing 11, and the axial positions of the fixed blades 12 and the rotating blades 22 are made flush.

Next, the seal ring 1121 is engaged with both end surfaces of the outer flange 210, the connection ring 1122 is fitted around the seal ring 1121, the seal ring 1121 and the connection ring 1122 are connected by screws, and the connection ring 1122 and the cylinder liner 11 are connected by screws.

Next, the piston seal 33 is fitted over the piston 32, and the piston 32 with the piston seal 33 fitted therein is fitted into the rotating sleeve 21.

Then, the cover plate 212 and the cover body 211 are connected by screw connection, and the annular seal ring 213 is interposed between the cover body 211 and the cover plate 212.

Then, the stoppers 315 are placed at two ends of the piston rod 31 and fixed in the piston rod 31 by plug welding, so as to prevent the hydraulic oil from leaking.

When the device is used, the cylinder sleeve 11 is fixed on a workbench, two ends of the piston rod 31 are connected with an external moving object, and one end of the rotor 2 is connected with the external moving object.

When the hydraulic oil cylinder is required to output linear motion, hydraulic oil is input into the third oil cavity 203 or the fourth oil cavity 204 to drive the piston 32 to perform reciprocating linear motion, and at the moment, a corresponding moving object can perform linear motion.

When the hydraulic cylinder is required to output torque, hydraulic oil is input into the first oil cavity 201 or the second oil cavity 202 to drive the rotor 2 to rotate, and at the moment, a corresponding moving object can rotate.

The hydraulic oil cylinder provided by the disclosure is used as power equipment of engineering machinery, the output torque and linear motion mode of the hydraulic oil cylinder can be more suitable for various complex works, and the hydraulic oil cylinder is novel in design, compact in structure, simple and convenient to install.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims

1. A hydraulic oil cylinder is characterized by comprising a cylinder body (1), a rotor (2) and a piston structure (3);

the rotor (2) is rotatably positioned in the cylinder body (1), a first oil cavity (201) and a second oil cavity (202) which are isolated from each other are formed between the outer peripheral wall of the rotor (2) and the inner peripheral wall of the cylinder body (1), and the rotating axis of the rotor (2) is parallel to the central axis of the cylinder body (1);

piston structure (3) are movably located in rotor (2), just the periphery wall of piston structure (3) with the internal perisporium sliding contact of rotor (2) to with the inner space partition of rotor (2) is third oil pocket (203) and fourth oil pocket (204), the moving direction of piston structure (3) with the direction at the axis place of cylinder body (1) is the same.

2. Hydraulic cylinder according to claim 1, characterized in that the rotor (2) comprises a rotating sleeve (21) and rotating blades (22);

the rotating blades (22) are connected with the outer peripheral wall of the rotating sleeve (21), and the length direction of the rotating blades (22) is the same as the direction of the central axis of the rotating sleeve (21);

the cylinder body (1) comprises a cylinder sleeve (11) and fixed blades (12);

the fixed blades (12) are connected with the inner peripheral wall of the cylinder sleeve (11), and the length direction of the fixed blades (12) is the same as that of the rotating blades (22);

the cylinder sleeve (11) is coaxially sleeved outside the rotating sleeve (21), one side of the fixed blade (12), one side of the rotating blade (22), the outer peripheral wall of the rotating sleeve (21) and the inner peripheral wall of the cylinder sleeve (11) are limited to form the first oil cavity (201), and the other side of the fixed blade (12), the other side of the rotating blade (22), the outer peripheral wall of the rotating sleeve (21) and the inner peripheral wall of the cylinder sleeve (11) are limited to form the second oil cavity (202).

3. A hydraulic cylinder according to claim 2, characterized in that the outer peripheral wall of the rotating sleeve (21) has, in the middle, an outer flange (210);

the rotor blade (22) is connected to the outer flange (210) and the rotor blade (22) extends from a first end of the outer flange (210) to a second end of the outer flange (210);

the cylinder sleeve (11) comprises a body (111) and two end covers (112);

the two end covers (112) are respectively connected with two ends of the body (111), one of the two end covers (112) is in sealing contact with a first end face of the outer flange (210), and the other end of the two end covers (112) is in sealing contact with a second end face of the outer flange (210);

the inner peripheral wall of the body (111) is connected with the fixed blades (12), and the body (111) is sleeved outside the rotating sleeve (21).

4. A hydraulic cylinder according to claim 3, characterized in that the side wall of the body (111) has a first oil delivery port (1111) and a second oil delivery port (1112);

the first oil delivery port (1111) is communicated with the first oil chamber (201);

the second oil delivery port (1112) is communicated with the second oil chamber (202).

5. A hydraulic ram according to claim 3, characterised in that the end cap (112) comprises a sealing ring (1121) and a connecting ring (1122);

the sealing ring (1121) is positioned between the connecting ring (1122) and the end face of the outer flange (210), and the sealing ring (1121) is connected with the connecting ring (1122);

the connection ring (1122) is connected to an end of the body (111).

6. The hydraulic oil cylinder as claimed in claim 2, characterized in that the rotating blade (22) is provided with a rotating sealing groove (221) along the length direction thereof;

the rotor (2) further comprises a rotary sealing rubber strip, the rotary sealing rubber strip is located in the rotary sealing groove (221), and the rotary sealing rubber strip is in contact with the inner peripheral wall of the cylinder sleeve (11).

7. The hydraulic cylinder according to claim 2, characterized in that the fixed blade (12) has a fixed seal groove (121) along its length;

the cylinder body (1) further comprises a fixed sealing rubber strip, the fixed sealing rubber strip is located in the fixed sealing groove (121), and the fixed sealing rubber strip is in contact with the outer peripheral wall of the rotating sleeve (21).

8. A hydraulic ram according to claim 2, characterised in that the piston structure (3) comprises a piston rod (31) and a piston (32);

the piston rod (31) is inserted into the piston (32), and two ends of the piston rod (31) protrude out of the piston (32);

the rotating sleeve (21) comprises a sleeve body (211) and two cover plates (212), and the two cover plates (212) are respectively sealed and covered at two ends of the sleeve body (211);

the first end of the piston rod (31) is hermetically inserted in one of the two cover plates (212), the second end of the piston rod (31) is hermetically inserted in the other of the two cover plates (212), the piston (32) is movably positioned in the sleeve body (211), and the outer peripheral wall of the piston (32) is in sliding sealing contact with the inner peripheral wall of the sleeve body (211);

the third oil chamber (203) is defined and formed between one side of the piston (32), one of the two cover plates (212) and the inner peripheral wall of the sleeve body (211), and the fourth oil chamber (204) is defined and formed between the other side of the piston (32), the other of the two cover plates (212) and the inner peripheral wall of the sleeve body (211).

9. The hydraulic oil cylinder as claimed in claim 8, characterized in that the piston rod (31) is internally provided with a first oil channel (311) and a second oil channel (312) which are mutually isolated along the direction of the axis of the piston rod;

the first oil channel (311) and the second oil channel (312) are respectively located on two sides of the piston (32), two ends of the first oil channel (311) are respectively communicated with the third oil cavity (203) and the outside, and two ends of the second oil channel (312) are respectively communicated with the fourth oil cavity (204) and the outside.

10. A hydraulic cylinder according to claim 8, characterized in that the piston structure (3) further comprises at least one piston seal ring (33);

at least one piston sealing ring (33) is sleeved on the outer peripheral wall of the piston (32), and the piston sealing ring (33) is in sliding contact with the inner peripheral wall of the sleeve body (211).