CN209959618U - Double-stage oil cylinder telescopic mechanism of lorry-mounted crane - Google Patents
Double-stage oil cylinder telescopic mechanism of lorry-mounted crane Download PDFInfo
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- CN209959618U CN209959618U CN201920711996.5U CN201920711996U CN209959618U CN 209959618 U CN209959618 U CN 209959618U CN 201920711996 U CN201920711996 U CN 201920711996U CN 209959618 U CN209959618 U CN 209959618U
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Abstract
The utility model relates to the technical field of two-stage oil cylinders of cranes, which discloses a two-stage oil cylinder telescopic mechanism of a lorry-mounted crane, comprising a first-stage oil cylinder and a second-stage oil cylinder which are arranged in parallel, wherein the end part of a piston rod of the first-stage oil cylinder, which is far away from the first-stage oil cylinder, is provided with a first-stage conduction pipe, the end part of a piston rod of the second-stage oil cylinder, which is far away from the second-stage oil cylinder, is fixedly connected with a second-stage conduction pipe through a communication pipe, the first-stage conduction pipe and the second-stage conduction pipe are arranged horizontally, one end of the first-stage conduction pipe, which is far away from the piston rod of the first-stage oil cylinder, is provided with a limiting part, the second-stage conduction pipe is inserted and arranged at the inner side of the limiting part, and the, the secondary oil cylinder retracts and then retracts the primary oil cylinder, so that the oil cylinder is stable, practical and reliable.
Description
Technical Field
The utility model relates to a hoist doublestage hydro-cylinder technical field especially relates to lorry crane doublestage hydro-cylinder telescopic machanism.
Background
The double-stage telescopic oil cylinder of the lorry-mounted crane has the advantages that the hoisting weight is greater than that of a single-stage telescopic oil cylinder only in the effective distance, and the oil circuit of the existing telescopic oil cylinder is designed in two oil return modes, wherein one oil return mode is direct, and the first-stage oil cylinder and the second-stage oil cylinder are synchronously retracted by adopting the oil return mode, so that the two cylinders cannot be firstly retracted and then the first cylinder cannot be retracted; and the second is to control oil return by a pressure sequence valve, and by adopting the oil return mode, the second-stage oil cylinder retracts firstly, and the first-stage oil cylinder retracts after retraction is finished, so that the oil pressure is overhigh in the working process of the retraction oil cylinder due to pressure control.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the double-stage oil cylinder in the prior art can not be synchronously retracted or the oil pressure in the oil return work of the double-stage oil cylinder is too high, and providing a double-stage oil cylinder telescopic mechanism of the lorry-mounted crane.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
lorry crane doublestage hydro-cylinder telescopic machanism, including parallelly connected one-level hydro-cylinder and the second grade hydro-cylinder that sets up, one-level hydro-cylinder piston rod parallels and is in with one side with the second grade hydro-cylinder piston rod, the tip that one-level hydro-cylinder was kept away from to one-level hydro-cylinder piston rod is provided with the one-level conduction pipe, the tip that second grade hydro-cylinder piston rod was kept away from is through communicating pipe fixedly connected with second grade conduction pipe, the one-level conduction pipe sets up with the equal level of second grade conduction pipe, the one end that one-level hydro-cylinder piston rod was kept away from to the one-level conduction pipe is provided with the restriction part, the second grade conduction pipe is.
Preferably, the limiting part is a disc, a cavity is formed in the limiting part, outlets are symmetrically formed in two sides of the limiting part, and limiting blocks are arranged in the limiting part.
Preferably, the limiting block is a cylinder, a first through groove is formed in the center of the limiting block, a fixing column is inserted into the first through groove, second through grooves are symmetrically formed in two sides of the limiting block, and the second through grooves in the two sides are communicated with each other.
Preferably, a turntable bearing is disposed on one side of the limiting block, the turntable bearing is fixedly mounted on the inner side of the limiting portion, and the other side of the limiting block is mounted inside the limiting portion through a bearing.
Preferably, the fixing column is vertically arranged, and a horizontal through hole is formed in the column body of the fixing column.
Preferably, the first-stage conduction pipe penetrates through an outlet on one side of the limiting part and is in butt joint with the outer end of the notch of the second through groove on one side of the limiting block, and the second-stage conduction pipe penetrates through an outlet on the other side of the limiting part and is in butt joint with the outer end of the notch of the second through groove on the other side of the limiting block.
Preferably, the turntable bearing is an electric turntable bearing.
The utility model has the advantages that:
1. when the second grade hydro-cylinder piston rod stretches out, second grade hydro-cylinder piston rod drives the second grade conduction pipe and promotes forward for the second grade conduction pipe is taken out from the export of restriction portion one side, and the revolving stage bearing starts simultaneously, drives the restriction piece and rotates ninety degrees, makes the inner wall lid of restriction piece close on the through-hole, plays the effect of separation.
2. The piston rod of the secondary oil cylinder begins to contract, when the pipeline is in a communicated state, the oil way of the primary oil cylinder is opened, and then the piston rod of the primary oil cylinder begins to contract, so that the secondary oil cylinder can be ensured to contract first, the primary oil cylinder contracts after the secondary oil cylinder contracts, and the oil pressure is stable in the contraction working process of the oil cylinder.
To sum up, this device simple structure, the modern design enables the second grade hydro-cylinder and contracts earlier, and the second grade hydro-cylinder contracts the back and is contracting the one-level hydro-cylinder, and the hydro-cylinder is steady, practical reliable.
Drawings
Fig. 1 is a schematic view of a two-stage cylinder telescoping mechanism of a lorry-mounted crane according to the present invention;
FIG. 2 is a schematic view of the structure of the restricting part of the double-stage cylinder telescopic mechanism of the lorry-mounted crane of the present invention;
FIG. 3 is a schematic view of a fixed column structure of a double-stage cylinder telescopic mechanism of the lorry-mounted crane provided by the utility model;
fig. 4 is the utility model provides a lorry crane double-stage oil cylinder telescopic machanism's restriction piece schematic structure.
In the figure: the device comprises a first-stage oil cylinder 1, a first-stage oil cylinder piston rod 2, a first-stage conduction pipe 3, a second-stage oil cylinder 4, a second-stage oil cylinder piston rod 5, a communicating pipe 6, a second-stage conduction pipe 7, a limiting part 8, an outlet 9, a fixing column 10, a through hole 11, a turntable bearing 12, a limiting block 13, a first through groove 14 and a second through groove 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-4, a two-stage cylinder telescoping mechanism of a lorry-mounted crane comprises a first-stage cylinder 1 and a second-stage cylinder 4 which are arranged in parallel, a first-stage cylinder piston rod 2 is parallel to and located on the same side of a second-stage cylinder piston rod 5, a first-stage conduction pipe 3 is arranged at the end of the first-stage cylinder piston rod 2 away from the first-stage cylinder 1, a second-stage conduction pipe 7 is fixedly connected to the end of the second-stage cylinder piston rod 5 away from the second-stage cylinder 4 through a communication pipe 6, the first-stage conduction pipe 3 and the second-stage conduction pipe 7 are both horizontally arranged, a limiting part 8 is arranged at one end of the first-stage conduction pipe 3 away from the first-stage cylinder piston rod 2, the second-stage conduction pipe 7 is inserted into the inner side of the limiting part 8, the first-stage conduction pipe 3 and the second-stage conduction pipe 7 are, the limiting part 8 is internally provided with a limiting block 13, the limiting block 13 is in a cylindrical structure, the center of the limiting block 13 is provided with a through first through groove 14, a fixing column 10 is inserted into the first through groove 14, the two sides of the limiting block 13 are symmetrically provided with second through grooves 15, the second through grooves 15 on the two sides are mutually communicated, one side of the limiting block 13 is provided with a turntable bearing 12, the turntable bearing 12 is fixedly arranged at the inner side of the limiting part 8, the other side of the limiting block 13 is arranged inside the limiting part 8 through a bearing, the fixing column 10 is vertically arranged, the column body of the fixing column 10 is provided with a horizontal through hole 11, the through hole 11 and the central axis of the fixing column 10 are positioned on the same straight line, a first-stage conduction pipe 3 penetrates through an outlet 9 at one side of the limiting part 8 and is in butt joint with the outer end of a notch of the second through groove 15 fixed at one side of the limiting block 13, a second-stage conduction pipe 7 penetrates through an, the turntable bearing 12 is an electric turntable bearing.
In this embodiment, with reference to the drawings of the specification, firstly, the through hole 11 is communicated with the second through groove 15, when the second-stage cylinder piston rod 5 extends out, the second-stage cylinder piston rod 5 drives the second-stage conduction pipe 7 to push forward, so that the second-stage conduction pipe 7 is drawn out from the outlet on one side of the limiting part 8, and at the same time, the turntable bearing 12 is started to drive the limiting block 13 to rotate ninety degrees, so that the inner wall of the limiting block 13 covers the through hole 11, and a blocking effect is achieved; then the piston rod 5 of the secondary oil cylinder starts to contract, meanwhile, the rotary table bearing 12 is started to drive the limiting block 13 to rotate back to the original position, the piston rod 5 of the secondary oil cylinder drives the second-stage conduction pipe 7 on the piston rod 5 of the secondary oil cylinder to be inserted into the inner side of the outlet 9 of the limiting part 8 again, so that when the pipeline is in a communicated state, the oil way of the primary oil cylinder 1 is opened, and the piston rod 2 of the primary oil cylinder starts to contract, so that the secondary oil cylinder 4 can be ensured to contract first, the primary oil cylinder 1 is contracted after the secondary oil cylinder 4 contracts, and the oil pressure is stable in.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. A double-stage oil cylinder telescopic mechanism of a lorry-mounted crane comprises a primary oil cylinder (1) and a secondary oil cylinder (4) which are arranged in parallel, a piston rod (2) of the primary oil cylinder is parallel to a piston rod (5) of the secondary oil cylinder and is positioned at the same side, it is characterized in that the end part of the primary oil cylinder piston rod (2) far away from the primary oil cylinder (1) is provided with a primary conduction pipe (3), the end part of the secondary oil cylinder piston rod (5) far away from the secondary oil cylinder (4) is fixedly connected with a secondary conduction pipe (7) through a communicating pipe (6), the primary conduction pipe (3) and the secondary conduction pipe (7) are both horizontally arranged, one end of the primary conduction pipe (3) far away from the primary oil cylinder piston rod (2) is provided with a limiting part (8), the second-stage conduction pipe (7) is inserted into the inner side of the limiting part (8), and the first-stage conduction pipe (3) and the second-stage conduction pipe (7) are symmetrically arranged at two sides of the limiting part (8).
2. The lorry-mounted crane two-stage oil cylinder telescoping mechanism according to claim 1, wherein the limiting part (8) is a disc, a cavity is formed in the limiting part (8), outlets (9) are symmetrically formed in two sides of the limiting part (8), and a limiting block (13) is arranged in the limiting part (8).
3. The truck-mounted crane double-stage oil cylinder telescoping mechanism according to claim 2, wherein the limiting block (13) is a cylinder, a first through groove (14) is formed in the center of the limiting block (13) and penetrates through the limiting block, a fixing column (10) is inserted into the first through groove (14), second through grooves (15) are symmetrically formed in two sides of the limiting block (13), and the second through grooves (15) in the two sides are communicated with each other.
4. The truck-mounted crane double-stage oil cylinder telescopic mechanism is characterized in that one side of the limiting block (13) is provided with a rotary table bearing (12), the rotary table bearing (12) is fixedly arranged on the inner side of the limiting part (8), and the other side of the limiting block (13) is arranged in the limiting part (8) through a bearing.
5. The truck-mounted crane double-stage oil cylinder telescopic mechanism is characterized in that the fixed column (10) is vertically placed, and a horizontal through hole (11) is formed in the body of the fixed column (10).
6. The truck-mounted crane double-stage oil cylinder telescoping mechanism according to any one of claims 2-5, characterized in that the first-stage conduction pipe (3) penetrates through the outlet (9) on one side of the limiting part (8) and is butt-jointed and fixed at the outer end of the notch of the second through groove (15) on one side of the limiting block (13), and the second-stage conduction pipe (7) penetrates through the outlet (9) on the other side of the limiting part (8) and is butt-jointed and fixed at the outer end of the notch of the second through groove (15) on the other side of the limiting block (13).
7. The lorry crane two-stage cylinder telescoping mechanism according to claim 4, characterized in that the turntable bearing (12) is an electric turntable bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920711996.5U CN209959618U (en) | 2019-05-17 | 2019-05-17 | Double-stage oil cylinder telescopic mechanism of lorry-mounted crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920711996.5U CN209959618U (en) | 2019-05-17 | 2019-05-17 | Double-stage oil cylinder telescopic mechanism of lorry-mounted crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209959618U true CN209959618U (en) | 2020-01-17 |
Family
ID=69246753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920711996.5U Active CN209959618U (en) | 2019-05-17 | 2019-05-17 | Double-stage oil cylinder telescopic mechanism of lorry-mounted crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209959618U (en) |
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2019
- 2019-05-17 CN CN201920711996.5U patent/CN209959618U/en active Active
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