CN215830858U - Sequential-actuation double-body hydraulic cylinder - Google Patents
Sequential-actuation double-body hydraulic cylinder Download PDFInfo
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- CN215830858U CN215830858U CN202121825783.9U CN202121825783U CN215830858U CN 215830858 U CN215830858 U CN 215830858U CN 202121825783 U CN202121825783 U CN 202121825783U CN 215830858 U CN215830858 U CN 215830858U
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Abstract
The utility model discloses a sequential-actuation double-body hydraulic cylinder which comprises a first cylinder body, a first piston rod, a second cylinder body, a second piston and a second piston rod, wherein the first cylinder body is provided with a first piston rod; the first cylinder body and the second cylinder body are correspondingly arranged in parallel; the first piston is arranged in the first cylinder body in a sliding and sealing mode so as to divide the inner cavity of the first cylinder body into a first chamber and a second chamber which are located on two sides of the inner cavity of the first cylinder body; the first piston rod is fixed on the first piston, arranged in the first cavity and extended out of one end of the first cylinder body; the second piston is arranged in the second cylinder body in a sliding and sealing mode so as to divide the inner cavity of the second cylinder body into a third chamber and a fourth chamber which are located on two sides of the inner cavity of the second cylinder body; a second piston rod is fixed to the second piston and disposed within the third chamber. According to the utility model, the proposed sequentially actuated double-body hydraulic cylinder can realize a larger stroke, and avoids the phenomenon that the diameter of the hydraulic cylinder is too large to cause bottom support; the first piston rod and the second piston rod realize sequential actuation in a pushing state; can be assembled and disassembled in a small space, and the application range is enlarged.
Description
Technical Field
The utility model relates to the technical field of hydraulic equipment, in particular to a sequential-actuation double-body hydraulic cylinder.
Background
When the installation space is insufficient, but a large-stroke hydraulic cylinder is needed, a common method is to use a multi-stage hydraulic cylinder to meet the use requirement, namely a plurality of hollow piston rods are sleeved together, and a sealing element is used for sealing between any two adjacent hollow piston rods. Such a hydraulic cylinder has a large diameter, but is not easily installed in a space requiring a special installation space.
Customers require to develop a hydraulic cylinder for a trailer to drive the rear wheel of the vehicle to move axially forward, so that the rear end of the upper bearing plate is inclined downward to contact the ground, and a load (such as a excavator) can move to the upper bearing surface by itself. The trailer requires that the diameter of the cylinder body is not easy to be overlarge when the hydraulic cylinder is used for rated output force so as to prevent bottom support.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems in the background technology, the utility model provides a sequential-actuation double-body hydraulic cylinder.
The utility model provides a sequential-actuation double-body hydraulic cylinder which comprises a first cylinder body, a first piston rod, a second cylinder body, a second piston and a second piston rod, wherein the first cylinder body is provided with a first piston rod;
the first cylinder body and the second cylinder body are correspondingly arranged in parallel;
the first piston is arranged in the first cylinder body in a sliding and sealing mode so as to divide the inner cavity of the first cylinder body into a first chamber and a second chamber which are located on two sides of the inner cavity of the first cylinder body; the first piston rod is fixed on the first piston, arranged in the first cavity and extended out of one end of the first cylinder body;
the second piston is arranged in the second cylinder body in a sliding and sealing mode so as to divide the inner cavity of the second cylinder body into a third chamber and a fourth chamber which are located on two sides of the inner cavity of the second cylinder body; the second piston rod is fixed on the second piston, arranged in the third cavity and extended out of the other end of the third cylinder;
the second chamber is communicated with the third chamber, a one-way sequence valve is arranged between the second chamber and the fourth chamber, the first chamber is communicated with the third chamber, and the first chamber and the second chamber can be respectively communicated with two external oil pumps.
Preferably, a fifth cavity is formed in the first piston rod, and a first flow passage and a second flow passage are formed in the first piston rod; the first flow channel is positioned at the outer end of the first piston rod, and the second flow channel is positioned on the side wall of the first piston rod and is close to the first piston; the first flow channel, the fifth cavity, the second flow channel and the first cavity are sequentially communicated, and the first flow channel is communicated with an external oil pump.
Preferably, the piston further comprises a first pipe body, a third flow channel penetrating through the fifth chamber is formed in the first piston rod, and the third flow channel is located at the outer end of the first piston rod; the first pipe body is arranged in the fifth chamber, one end of the first pipe body penetrates through the first piston to be communicated with the second chamber, the other end of the first pipe body is communicated with a third flow passage, and the third flow passage is communicated with an external oil pump.
Preferably, still include the second body, the second body both ends are installed respectively on first cylinder body and second cylinder body, and second body both ends communicate second cavity and fourth cavity respectively, and one-way sequence valve arranges in the second body and the kneck of fourth cavity/second cavity.
Preferably, the device further comprises a third pipe body, wherein two ends of the third pipe body are respectively installed on the first cylinder body and the second cylinder body and are located on one sides, far away from the second pipe body 9, of the first cylinder body 1 and the second cylinder body 2; the two ends of the third pipe body are respectively communicated with the first cavity and the third cavity.
Preferably, the first sealing bolt is further included and used for blocking the inlet of the first flow passage.
Preferably, the device further comprises a second sealing bolt, and the second sealing bolt is used for plugging the inlet of the third flow passage.
Preferably, the outer end of the first piston rod is provided with a first mounting hole which penetrates through the first piston rod.
Preferably, the outer end of the second piston rod is provided with a second mounting hole which penetrates through the second piston rod.
According to the utility model, the proposed sequentially-actuated double-body hydraulic cylinder not only realizes a larger stroke, but also avoids the overlarge diameter of the hydraulic cylinder and avoids the bottom support; the first piston rod and the second piston rod realize sequential actuation in a pushing state; the first cylinder body and the second cylinder body are arranged in parallel and correspondingly, so that the mounting space is reduced, the assembly and disassembly in a small space are ensured, and the application range is expanded.
Drawings
FIG. 1 is an assembly view of a sequential acting double body hydraulic cylinder according to the present invention.
FIG. 2 is an exploded view of a sequentially actuated twin-body hydraulic cylinder according to the present invention.
FIG. 3 is a top view of a sequential acting twin body hydraulic cylinder according to the present invention.
FIG. 4 is a front view of a sequential action double body hydraulic cylinder according to the present invention.
FIG. 5 is a cross-sectional view of a sequential action double body hydraulic cylinder according to the present invention.
FIG. 6 is a hydraulic diagram of a sequential actuation twin body hydraulic cylinder according to the present invention.
Detailed Description
Referring to fig. 1-6, fig. 1 is an assembly view of a sequential actuation twin-body hydraulic cylinder according to the present invention. FIG. 2 is an exploded view of a sequentially actuated twin-body hydraulic cylinder according to the present invention. FIG. 3 is a top view of a sequential acting twin body hydraulic cylinder according to the present invention. FIG. 4 is a front view of a sequential action double body hydraulic cylinder according to the present invention. FIG. 5 is a cross-sectional view of a sequential action double body hydraulic cylinder according to the present invention. FIG. 6 is a hydraulic diagram of a sequential actuation twin body hydraulic cylinder according to the present invention.
Referring to fig. 1-4 and 6, the utility model provides a sequential-actuation double-body hydraulic cylinder, which comprises a first cylinder body 1, a first piston 3, a first piston rod 4, a second cylinder body 2, a second piston 5 and a second piston rod 6;
the first cylinder body 1 and the second cylinder body 2 are correspondingly arranged in parallel;
the first piston 3 is arranged in the first cylinder 1 in a sliding and sealing mode so as to divide the inner cavity of the first cylinder 1 into a first chamber 1a and a second chamber 1b which are positioned on two sides of the first cylinder; a first piston rod 4 is fixed on the first piston 3 and arranged in the first chamber 1a and extends from one end of the first cylinder 1;
the second piston 5 is arranged in the second cylinder body 2 in a sliding and sealing mode so as to divide the inner cavity of the second cylinder body 2 into a third cavity 2a and a fourth cavity 2b which are positioned on two sides of the inner cavity; a second piston rod 6 is fixed on the second piston 5, arranged in the third chamber 2a and extends out of the other end in the second cylinder body 2;
the second chamber 1b is communicated with the third chamber 2a, a one-way sequence valve 7 is arranged between the second chamber 1b and the fourth chamber 2b, the first chamber 1a is communicated with the third chamber 2a, and the first chamber 1a and the second chamber 1b can be respectively communicated with two external oil pumps.
In the specific working process of the sequentially-actuated double-body hydraulic cylinder, when an external oil pump conveys oil into the second chamber 1b, the pressure in the second chamber 1b is gradually increased, pressure difference is generated between the pressure and the first chamber 1a, and the oil pushes the first piston 3 to move towards the first chamber 1 a; when the oil pressure in the second chamber 1b reaches a preset value, the one-way sequence valve 7 is conducted, oil flows into the fourth chamber 2b, the pressure in the fourth chamber 2b is gradually increased, and the oil pushes the second piston 5 to move towards the third chamber 2 a; at the moment, the first piston rod 4 and the second piston rod 6 are both in a pushing state until the second piston rod 6 moves to the maximum stroke position;
when the external oil pump conveys oil to the first chamber 1a, the pressure in the first chamber 1a is gradually increased, a pressure difference is generated between the pressure and the second chamber 1b, the oil pushes the first piston 3 to move to the second chamber 1b, and meanwhile, the oil has a thrust effect on the second piston 5, so that the second piston 5 moves to the fourth chamber 2 b; at this time, the first piston rod 4 and the second piston rod 6 are in a return stroke state until the first piston 3 and the second piston 5 move to the bottoms of the second chamber 1b and the fourth chamber 2b, respectively.
In the embodiment, the proposed sequentially-actuated double-body hydraulic cylinder not only realizes a larger stroke, but also avoids the overlarge diameter of the hydraulic cylinder and avoids the bottom support; the first piston rod 4 and the second piston rod 6 realize sequential actuation in a pushing state; the first cylinder body 1 and the second cylinder body 2 are arranged in parallel and correspondingly, so that the mounting space is reduced, the assembly and disassembly in a small space are ensured, and the application range is expanded.
Referring to fig. 5, in the specific embodiment, a fifth chamber 41 is formed in the first piston rod 4, and a first flow passage 42 and a second flow passage 43 are formed in the first piston rod 4; the first flow passage 42 is located at the outer end of the first piston rod 4, and the second flow passage 43 is located on the side wall of the first piston rod 4 and close to the first piston 3; the first flow passage 42, the fifth chamber 41, the second flow passage 43 and the first chamber 1a are sequentially communicated, and the first flow passage 42 is communicated with an external oil pump.
Has the advantages that: the external oil pump conveys oil to the interior of the fifth chamber 41 through the first flow passage 42, the pressure in the fifth chamber 41 is gradually increased, the oil flows to the interior of the first chamber 1a through the second flow passage 43, the pressure in the first chamber 1a is gradually increased along with the increase of the oil in the first chamber 1a, pressure difference is generated between the pressure and the second chamber 1b, and the oil pushes the first piston 3 to move to the second chamber 1 b; meanwhile, the oil has a thrust effect on the second piston 5, and the second piston 5 is moved to the fourth cavity 2 b; at this time, the first piston rod 4 and the second piston rod 6 are in a return stroke state until the first piston 3 and the second piston 5 move to the bottoms of the second chamber 1b and the fourth chamber 2b, respectively.
Referring to fig. 5, further, the piston further includes a first tube 8, a third flow channel 44 penetrating through the fifth chamber 41 is formed on the first piston rod 4, and the third flow channel 44 is located at the outer end of the first piston rod 4; the first tube 8 is disposed in the fifth chamber 41, and one end thereof penetrates through the first piston 3 to communicate with the second chamber 1b, and the other end thereof communicates with a third flow passage 44, and the third flow passage 44 communicates with an external oil pump.
Has the advantages that: the external oil pump conveys oil into the first pipe body 8 through the third flow passage 44, the oil in the first tank body is increased, the pressure is increased, the oil is conveyed into the second chamber 1b through the first pipe body 8, the pressure in the second chamber 1b is gradually increased, pressure difference is generated between the oil and the first chamber 1a, and the oil pushes the first piston 3 to move towards the first chamber 1 a; when the oil pressure in the second chamber 1b reaches a preset value, the one-way sequence valve 7 is conducted, oil flows into the fourth chamber 2b, the pressure in the fourth chamber 2b is gradually increased, and the oil pushes the second piston 5 to move towards the third chamber 2 a; at this time, the first piston rod 4 and the second piston rod 6 are in the advanced state until the first piston rod 4 and the second piston rod 6 move to the maximum stroke position.
The third flow passage 44 and the first flow passage 42 are both positioned at the outer end of the first piston rod 4, so that the oil pump is convenient to mount and dismount; when the first cylinder 1 and the second cylinder 2 move, the connected oil pump is ensured not to move along with the movement of the first cylinder 1 and the second cylinder 2.
Further, still include second body 9, second body 9 both ends are installed respectively on first cylinder 1 and second cylinder 2, and second body 9 both ends communicate second cavity 1b and fourth cavity 2b respectively, and one-way sequence valve 7 is arranged at the second body 9 and fourth cavity 2 b/the interface of second cavity 1 b.
Has the advantages that: two ends of the second pipe body 9 are respectively communicated with the second chamber 1b and the fourth chamber 2b, and oil liquid sequentially passes through the second chamber 1b, the second pipe body 9 and the fourth chamber 2 b.
Furthermore, the device also comprises a third pipe body 13, wherein two ends of the third pipe body 13 are respectively arranged on the first cylinder body 1 and the second cylinder body 2 and are positioned on one sides of the first cylinder body 1 and the second cylinder body 2, which are far away from the second pipe body 9; the third tube 13 has two ends respectively connected to the first chamber 1a and the third chamber 2 a.
Has the advantages that: two ends of the third pipe body 13 are respectively communicated with the first chamber 1a and the third chamber 2a, and oil liquid sequentially passes through the first chamber 1a, the third pipe body 13 and the third chamber 2 a.
In other embodiments, a first sealing bolt 10 is further included, and the first sealing bolt 10 is used for sealing off the inlet of the first flow passage 42.
Has the advantages that: after the pressure resistance test is performed, oil is left in the fifth chamber 41, the first chamber 1a and the third chamber 2a, and the first sealing bolt 10 seals the inlet of the first flow passage 42, so that the oil in the fifth chamber 41, the first chamber 1a and the third chamber 2a is prevented from seeping out and causing pollution in the transportation process.
Further, a second sealing bolt 11 is further included, and the second sealing bolt 11 is used for sealing off the inlet of the third flow channel 44.
Has the advantages that: after the pressure resistance test is performed, oil is left in the second pipe body 9, the second chamber 1b and the fourth chamber 2b, and the second sealing bolt 11 seals the inlet of the third flow channel 44, so that the phenomenon that the oil in the second pipe body 9, the second chamber 1b and the fourth chamber 2b seeps out to cause pollution in the transportation process is avoided.
Further, the outer end of the first piston rod 4 is provided with a first mounting hole 45.
Has the advantages that: the first mounting hole 45 is used to connect the first piston rod 4 with other components.
Further, the outer end of the second piston rod 6 is provided with a second mounting hole 61 penetrating therethrough.
Has the advantages that: the second mounting hole 61 is used to connect the second piston rod 6 with other components.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (9)
1. A sequentially actuated double-body hydraulic cylinder is characterized by comprising a first cylinder body (1), a first piston (3), a first piston rod (4), a second cylinder body (2), a second piston (5) and a second piston rod (6);
the first cylinder body (1) and the second cylinder body (2) are arranged in parallel and correspondingly;
the first piston (3) is arranged in the first cylinder (1) in a sliding and sealing mode to divide the inner cavity of the first cylinder (1) into a first chamber (1a) and a second chamber (1b) which are located on two sides of the first cylinder; the first piston rod (4) is fixed on the first piston (3), arranged in the first chamber (1a) and extended out of one end of the first cylinder body (1);
the second piston (5) is arranged in the second cylinder body (2) in a sliding and sealing mode so as to divide the inner cavity of the second cylinder body (2) into a third cavity (2a) and a fourth cavity (2b) which are positioned on two sides of the second cylinder body; the second piston rod (6) is fixed on the second piston (5), arranged in the third chamber (2a) and extends out of the other end in the second cylinder body (2);
the second chamber (1b) is communicated with the third chamber (2a), a one-way sequence valve (7) is arranged between the second chamber (1b) and the fourth chamber (2b), the first chamber (1a) is communicated with the third chamber (2a), and the first chamber (1a) and the second chamber (1b) can be respectively communicated with two external oil pumps.
2. The sequentially actuated double-body hydraulic cylinder according to claim 1, wherein a fifth chamber (41) is formed in the first piston rod (4), and a first flow passage (42) and a second flow passage (43) are formed in the first piston rod (4); the first flow channel (42) is positioned at the outer end of the first piston rod (4), and the second flow channel (43) is positioned on the side wall of the first piston rod (4) and close to the first piston (3); the first flow channel (42), the fifth cavity (41), the second flow channel (43) and the first cavity (1a) are sequentially communicated, and the first flow channel (42) is communicated with an external oil pump.
3. The sequentially actuated double-body hydraulic cylinder according to claim 2, further comprising a first pipe (8), wherein the first piston rod (4) is provided with a third flow passage (44) penetrating through the fifth chamber (41), and the third flow passage (44) is located at the outer end of the first piston rod (4); the first pipe body (8) is arranged in the fifth chamber (41), one end of the first pipe body penetrates through the first piston (3) to be communicated with the second chamber (1b), the other end of the first pipe body is communicated with a third flow passage (44), and the third flow passage (44) is communicated with an external oil pump.
4. A sequential actuating twin cylinder according to any one of claims 1 to 3 which includes a second tube (9), the ends of the second tube (9) being mounted to the first cylinder (1) and the second cylinder (2), respectively, the ends of the second tube (9) being connected to the second chamber (1b) and the fourth chamber (2b), respectively, and a one-way sequence valve (7) being disposed at the interface between the second tube (9) and the fourth chamber (2 b)/the second chamber (1 b).
5. A sequential actuating twin-body hydraulic cylinder according to any one of claims 1 to 3, characterised in that it further comprises a third tube (13), the third tube (13) being mounted at each of its ends to the first (1) and second (2) cylinders and being located on the side of the first (1) and second (2) cylinders remote from the second tube (9); the two ends of the third pipe body (13) are respectively communicated with the first chamber (1a) and the third chamber (2 a).
6. A sequential actuating dual body hydraulic cylinder according to claim 2 further including a first sealing bolt (10), the first sealing bolt (10) being adapted to close off the inlet to the first flow passage (42).
7. A sequential actuating dual body hydraulic cylinder according to claim 3 further including a second sealing bolt (11), the second sealing bolt (11) being adapted to close off the inlet to the third flow passage (44).
8. A sequentially acting double body hydraulic cylinder according to any one of claims 1-3, characterised in that the outer end of the first piston rod (4) is provided with a first mounting hole (45) therethrough.
9. A sequentially acting double body hydraulic cylinder according to any one of claims 1-3, characterised in that the outer end of the second piston rod (6) is provided with a second mounting hole (61) therethrough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121825783.9U CN215830858U (en) | 2021-08-05 | 2021-08-05 | Sequential-actuation double-body hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121825783.9U CN215830858U (en) | 2021-08-05 | 2021-08-05 | Sequential-actuation double-body hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215830858U true CN215830858U (en) | 2022-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121825783.9U Active CN215830858U (en) | 2021-08-05 | 2021-08-05 | Sequential-actuation double-body hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215830858U (en) |
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2021
- 2021-08-05 CN CN202121825783.9U patent/CN215830858U/en active Active
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