CN215908175U - Multi-stage hydraulic oil cylinder formed by connecting multiple hydraulic oil cylinders with same stroke in series - Google Patents
Multi-stage hydraulic oil cylinder formed by connecting multiple hydraulic oil cylinders with same stroke in series Download PDFInfo
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- CN215908175U CN215908175U CN202121565535.5U CN202121565535U CN215908175U CN 215908175 U CN215908175 U CN 215908175U CN 202121565535 U CN202121565535 U CN 202121565535U CN 215908175 U CN215908175 U CN 215908175U
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Abstract
A multi-stage hydraulic cylinder formed by connecting a plurality of hydraulic cylinders with the same stroke in series is formed by connecting the multi-stage hydraulic cylinders in series, the output load of the multi-stage hydraulic cylinder is the sum of the loads of a plurality of sub-cylinders, the multi-stage hydraulic cylinder works by adopting the principle of a pushing action part, the oil cylinder is formed by sequentially connecting a plurality of single-stage sub-cylinders with equal length, stroke and cross-sectional area in series longitudinally, an oil inlet and an oil return port are arranged on a cylinder barrel at the tail end of the oil cylinder, an oil inlet channel of each sub-cylinder is arranged in a piston rod assembly in a small hole mode, and an oil return channel is arranged in a cylinder wall in a small hole mode; the arrangement mode has a smaller cross section area on the premise of ensuring larger axial output load, and has remarkable application advantages in certain narrow spaces, especially application places such as drilling holes and the like which have certain limitation on the cross section area of the oil cylinder.
Description
Technical Field
The utility model belongs to the technical field of hydraulic mechanical devices or equipment for providing axial output load, and particularly relates to a multistage hydraulic oil cylinder formed by connecting a plurality of hydraulic oil cylinders with the same stroke in series.
Background
At present, most of hydraulic oil cylinders commonly used in the mechanical field are single-stage oil cylinders. Under the premise of certain input oil pressure, the output load of the oil cylinder is in positive correlation with the cross section area of the oil cylinder, namely the output load is small when the cross section area of the oil cylinder is small, and the output load is large when the cross section area of the oil cylinder is large. In order to obtain larger output load in engineering practice, a method for increasing the cross-sectional area of the oil cylinder is required. However, in the engineering application places where the oil cylinder needs to be inserted into a narrow space such as a drill hole, the output load of the oil cylinder cannot be reduced, but the cross-sectional area of the oil cylinder cannot be too large, and under the condition, the single-stage hydraulic oil cylinder cannot achieve the purpose.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a multistage hydraulic oil cylinder which is formed by connecting a plurality of hydraulic oil cylinders with the same stroke in series, has reasonable design and simple structure, adopts a direct connection mode of end to connect a plurality of single-stage oil cylinders in series longitudinally and realizes the purpose of providing larger output load on the premise of reducing the cross sectional area.
The technical scheme for solving the technical problems is as follows: a multi-stage hydraulic cylinder is composed of multiple hydraulic cylinders with same stroke, two sets of quick-release joints are arranged at the rear part of a tail cylinder, one set of quick-release joints is communicated with an external oil return pipeline, the other set of quick-release joints is communicated with an external oil inlet pipeline, a tail piston rod assembly is arranged in the tail cylinder, at least one set of middle cylinder is arranged between the tail cylinder and a front cylinder, a front piston rod assembly is arranged in the front cylinder, a middle piston rod assembly is arranged in the middle cylinder, a piston rod of the tail piston rod assembly is communicated with a piston of the first set of middle piston rod assemblies, piston rods of the other middle piston rod assemblies are communicated with the head and the tail of the piston, a piston rod of the last set of middle piston rod assembly is communicated with a piston of the front piston rod assembly, a front end cover is arranged at the front part of the front cylinder and is connected with an action part, and an external oil return pipeline is communicated with an oil return cavity of the tail cylinder, and the external oil inlet pipeline is communicated with the oil inlet cavity of the tail end oil cylinder.
The tail end cylinder barrel of the utility model is as follows: the tail end cylinder body is of a hollow cylindrical structure, an oil return port and an oil inlet are machined in the rear wall of the tail end cylinder body, the oil return port is communicated with one port of a tail end oil return hole machined in the side wall of the tail end cylinder body, the other port of the tail end oil return hole is machined in the inner side wall of the tail end cylinder body and is communicated with a tail end return cavity, the oil inlet is communicated with one port of a tail end oil inlet hole machined in the rear wall of the tail end cylinder body, and the other port of the tail end oil inlet hole is machined in the bottom of the tail end cylinder body and is communicated with the tail end oil inlet cavity.
The utility model discloses a tail end piston rod assembly, which comprises: the one end of piston rod is provided with the piston, and the central point of piston rod and piston puts and processes there is the tail end oil feed pipeline, and the tail end oil feed pipeline runs through piston rod and piston, and the processing of the piston rod other end has the mount table, and the piston phase-match of piston rod subassembly in the middle of mount table and the first group, the radial processing of the other end of piston rod has 1 at least group's oil outlet, and the oil outlet is linked together with tail end oil feed pipeline.
The structure of the tail end piston rod assembly and the structure of the middle piston rod assembly are the same.
The middle cylinder barrel of the utility model is as follows: middle cylinder body is hollow cylinder, the inside processing of the left end of middle cylinder body has the step hole, the right-hand member processing has the installation arch, the protruding outside processing of installation has first gasket groove, inside processing has the piston rod mounting hole, the protruding inside piston rod mounting hole of installation has the second gasket groove with piston rod contact department processing, middle cylinder body has middle oil gallery with the protruding inside processing of installation, the one end opening of middle oil gallery is located the bellied right-hand member of installation, the other end opening is located the right-hand member that just is located the step hole on the cylinder body left end inner wall in the middle of.
The front end cylinder barrel and the middle cylinder barrel have the same structure.
The length, the outer diameter and the cross sectional area of the front-end cylinder barrel, the middle cylinder barrel and the tail-end cylinder barrel are equal, and the strokes of the piston rod assemblies corresponding to the cylinder barrels are equal.
Because the multi-stage oil cylinder is formed by longitudinally connecting a plurality of single-stage sub-oil cylinders with equal length, stroke and cross-sectional area in series end to end, the output load of the multi-stage oil cylinder is the sum of the loads of the plurality of sub-oil cylinders; the adjacent sub-cylinders are connected through threads; an oil inlet and an oil return port outside the oil cylinder are arranged at the bottom of a cylinder barrel of the last-stage oil cylinder; the oil inlet channels of the sub oil cylinders are arranged in the piston rod in a small hole mode, the oil return channels of the sub oil cylinders are arranged in the cylinder barrel wall in a small hole mode, the arrangement mode has a small cross section area on the premise of ensuring large axial output load, and the arrangement mode has obvious application advantages in certain narrow spaces, particularly application places such as drilling and the like which have certain limitation on the cross section area of the oil cylinders.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
Fig. 3 is a sectional view B-B of fig. 1.
Fig. 4 is a schematic structural view of the tail cylinder 6 in fig. 3.
Fig. 5 is a schematic view of the trailing piston rod assembly 7 of fig. 3.
Fig. 6 is a schematic view of the structure of the intermediate cylinder 4 in fig. 3.
In the figure: 1. a front end cap; 2. a front end cylinder barrel; 3. a front end piston rod assembly; 4. a middle cylinder barrel; 5. an intermediate piston rod assembly; 6. a tail end cylinder barrel; 7. a trailing end piston rod assembly; 8. a quick release coupling; 4-1, a middle cylinder barrel body; 4-2, mounting a bulge; 6-1, a tail end cylinder barrel body; 7-1, a piston rod; 7-2, a piston; 7-1-1, a mounting table; a. a tail oil return hole; b. an oil return port; c. an oil inlet; d. a tail end oil inlet hole; e. the tail end of the oil inlet pipeline; f. an oil outlet hole; g. a middle oil return hole; h. a first gasket groove; i. a second gasket groove; j. a piston rod mounting hole; k. a stepped bore.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, but the present invention is not limited to these examples.
Example 1
In the figures 1-6, the utility model relates to a multi-stage hydraulic oil cylinder formed by connecting a plurality of hydraulic oil cylinders with the same stroke in series, which is formed by sequentially connecting a tail end oil cylinder, at least 1 group of middle oil cylinders, a front end oil cylinder and a front end cover 1 end to end, wherein each stage of oil cylinder is internally provided with a piston rod assembly, a cylinder barrel of each stage of oil cylinder is divided into a left end space and a right end space by a piston, the left end space is a return cavity, the right end space is an oil inlet cavity, the output load of the multi-stage hydraulic oil cylinder is provided by the multi-stage series hydraulic oil cylinder, the output load is the sum of the loads of the plurality of oil cylinders, and the motion of all the piston rod assemblies is in the same direction superposition motion, namely, the left motion pushes an acting part to work at the same time, or the right motion simultaneously carries out the reset after the work. Further, in order to ensure the series effect, the lengths, the outer diameters and the cross-sectional areas of the front-end cylinder barrel 2, the middle cylinder barrel 4 and the tail-end cylinder barrel 6 are equal, and the strokes of the piston assemblies corresponding to the cylinder barrels are equal. The tail cylinder 6 of the embodiment is composed of a tail cylinder body 6-1, the tail cylinder body 6-1 is a hollow cylindrical structure, an oil return port b and an oil inlet c are processed on the rear wall of the tail cylinder body 6-1, the oil return port b is communicated with one port of a tail oil return hole a processed on the side wall of the tail cylinder body 6-1, the other port of the tail oil return hole a is processed on the inner side wall of the tail cylinder body 6-1 and is communicated with a tail return cavity, the oil inlet c is communicated with one port of a tail oil inlet hole d processed on the rear wall of the tail cylinder body 6-1, the other port of the tail oil inlet hole d is processed on the inner bottom of the tail cylinder body 6-1 and is communicated with the tail oil inlet cavity, the oil return port b and the oil inlet c are respectively communicated with two sets of quick release connectors 8, one set of quick release connectors 8 is communicated with an external oil return pipeline, The other group of quick release joints 8 is communicated with an external oil inlet pipeline.
The tail end cylinder 6 is internally provided with a tail end piston rod assembly 7, at least one group of middle cylinder barrels 4 are arranged between the tail end cylinder 6 and the front end cylinder barrel 2, the front end cover 1 is arranged at the front part of the front end cylinder barrel 2, and the front end cover 1 is connected with an action part. The quantity that sets up of middle cylinder 4 sets up according to concrete operating mode, and this embodiment explains with cylinder 4 in the middle of only installing 1 group, and 2 internally mounted of front end cylinder have front end piston rod assembly 3, and middle cylinder 4 internally mounted has middle piston rod assembly 5, in order to prevent that the hydraulic oil in each return stroke chamber and each oil feed chamber from revealing the mixture, installs the packing ring between piston and the cylinder at different levels. The middle cylinder barrel 4 of the embodiment is formed by integrally connecting a middle cylinder barrel body 4-1 and a mounting bulge 4-2, the middle cylinder barrel body 4-1 is a hollow cylinder, a step hole k is processed in the left end of the middle cylinder barrel body 4-1, a mounting bulge 4-2 is processed at the right end, a first gasket groove h is processed outside the mounting bulge 4-2, a piston rod mounting hole j is processed inside the mounting bulge 4-2, a second gasket groove i is processed at the contact part of the piston rod mounting hole j inside the mounting bulge 4-2 and the piston rod, gaskets of different types are mounted in the first gasket groove h and the second gasket groove i to prevent hydraulic oil from leaking, a middle oil return hole g is processed inside the middle cylinder barrel body 4-1 and the mounting bulge 4-2, one end opening of the middle oil return hole g is positioned at the right end of the mounting bulge 4-2, and the other end opening is positioned on the left end inner wall of the middle cylinder barrel body 4-1 and positioned at the right end of the step hole k . The front end cylinder 2 and the middle cylinder 4 have the same structure.
The structure of the middle piston rod assembly 5 is the same as that of the tail end piston rod assembly 7, the tail end piston rod assembly 7 is formed by connecting a piston rod 7-1, a piston 7-2 and an installation platform 7-1-1, the piston 7-2 is installed at one end of the piston rod 7-1, a tail end oil inlet pipeline e is processed at the center positions of the piston rod 7-1 and the piston 7-2 and penetrates through the piston rod 7-1 and the piston 7-2, the installation platform 7-1-1 is processed at the other end of the piston rod 7-1, the installation platform 7-1-1 is matched with the piston of the middle piston rod assembly 5, at least 1 group of oil outlet holes f are radially processed at the other end of the piston rod 7-1, and the oil outlet holes f are communicated with the tail end oil inlet pipeline e. Hydraulic oil gets into the tail end oil feed intracavity through tail end inlet port d, the hydraulic oil that gets into in the tail end oil feed intracavity gets into tail end oil feed pipeline e when promoting the motion of tail end piston assembly 7, later get into middle cylinder 4 from oil outlet f in, get into in front end cylinder 2 through middle oil feed pipeline and oil outlet when promoting the motion of middle piston assembly 5 and promote front end piston assembly 3 to move, because front end piston rod assembly 3 directly with by the effect part be connected, so front end piston rod assembly 3 does not process front end oil feed pipeline and oil outlet. When each group of piston rod assemblies are pushed to advance, hydraulic oil in each return cavity sequentially enters the return cavity of the upper-stage cylinder barrel through oil return holes machined in the inner wall of the cylinder barrel until reaching the tail end return cavity, and finally enters an external oil return pipeline through the tail end oil return hole a.
When at least 1 group of middle oil cylinders are installed, the piston rod of the tail end piston rod assembly 7 is communicated with the piston of the first group of middle piston rod assemblies 5, the piston rods of the rest middle piston rod assemblies 5 are communicated with the head and the tail of the piston, and the piston rod of the last group of middle piston rod assemblies 5 is communicated with the piston of the front end piston rod assembly 3.
Claims (7)
1. A multistage hydraulic cylinder that comprises the same hydraulic cylinder of a plurality of strokes series connection, its characterized in that: the rear part of the tail end cylinder barrel (6) is provided with two groups of quick-release connectors (8), one group of quick-release connectors (8) is communicated with an external oil return pipeline, the other group of quick-release connectors (8) is communicated with an external oil inlet pipeline, a tail end piston rod assembly (7) is arranged inside the tail end cylinder barrel (6), at least one group of middle cylinder barrels (4) is arranged between the tail end cylinder barrel (6) and the front end cylinder barrel (2), a front end piston rod assembly (3) is arranged inside the front end cylinder barrel (2), a middle piston rod assembly (5) is arranged inside the middle cylinder barrel (4), a piston rod of the tail end piston rod assembly (7) is communicated with a piston of the first group of middle piston rod assemblies (5), piston rods of the other middle piston rod assemblies (5) are communicated with the head and the tail of the piston, a piston rod of the last group of the middle piston rod assembly (5) is communicated with a piston of the front end piston rod assembly (3), the front part of the front end cylinder barrel (2) is provided with a front end cover (1), the front end cover (1) is connected with an action part, an external oil return pipeline is communicated with an oil return cavity of the tail end oil cylinder, and an external oil inlet pipeline is communicated with an oil inlet cavity of the tail end oil cylinder.
2. The multistage hydraulic cylinder consisting of a plurality of hydraulic cylinders with the same stroke in series according to claim 1, characterized in that the tail cylinder (6) is: the tail end cylinder body (6-1) is of a hollow cylindrical structure, an oil return port (b) and an oil inlet (c) are machined in the rear wall of the tail end cylinder body (6-1), the oil return port (b) is communicated with one port of a tail end oil return hole (a) machined in the side wall of the tail end cylinder body (6-1), the other port of the tail end oil return hole (a) is machined in the inner side wall of the tail end cylinder body (6-1) and is communicated with a tail end return cavity, the oil inlet (c) is communicated with one port of a tail end oil inlet hole (d) machined in the rear wall of the tail end cylinder body (6-1), and the other port of the tail end oil inlet hole (d) is machined in the inner bottom of the tail end cylinder body (6-1) and is communicated with the tail end oil inlet cavity.
3. A multi-stage hydraulic ram comprising a plurality of hydraulic rams of the same stroke in series as claimed in claim 1 wherein the tail piston rod assembly (7) is: one end of a piston rod (7-1) is provided with a piston (7-2), a tail oil inlet pipeline (e) is processed at the center positions of the piston rod (7-1) and the piston (7-2), the tail oil inlet pipeline (e) penetrates through the piston rod (7-1) and the piston (7-2), an installation platform (7-1-1) is processed at the other end of the piston rod (7-1), the installation platform (7-1-1) is matched with the piston of the first group of middle piston rod assemblies (5), at least 1 group of oil outlets (f) are radially processed at the other end of the piston rod (7-1), and the oil outlets (f) are communicated with the tail oil inlet pipeline (e).
4. A multi-stage hydraulic ram according to claim 3 comprising a plurality of hydraulic rams of the same stroke connected in series wherein: the structure of the tail end piston rod assembly (7) is the same as that of the middle piston rod assembly (5).
5. A multistage hydraulic cylinder composed of a plurality of hydraulic cylinders of the same stroke connected in series according to claim 1, characterised in that said intermediate cylinder (4) is: the middle cylinder barrel body (4-1) is a hollow cylinder, a step hole (k) is machined in the left end of the middle cylinder barrel body (4-1), a mounting protrusion (4-2) is machined in the right end of the middle cylinder barrel body, a first gasket groove (h) is machined in the outer portion of the mounting protrusion (4-2), a piston rod mounting hole (j) is machined in the inner portion of the mounting protrusion, a second gasket groove (i) is machined in the contact portion of the piston rod mounting hole (j) in the inner portion of the mounting protrusion (4-2) and a piston rod, a middle oil return hole (g) is machined in the middle cylinder barrel body (4-1) and the mounting protrusion (4-2), one end opening of the middle oil return hole (g) is located at the right end of the mounting protrusion (4-2), and the other end opening is located on the inner wall of the left end of the middle cylinder barrel body (4-1) and located at the right end of the step hole (k).
6. A multi-stage hydraulic ram according to claim 5 comprising a plurality of hydraulic rams of the same stroke connected in series wherein: the front end cylinder barrel (2) and the middle cylinder barrel (4) are identical in structure.
7. The multi-stage hydraulic ram of claim 1, comprising a plurality of hydraulic rams of the same stroke connected in series, wherein: the length, the outer diameter and the cross-sectional area of the front-end cylinder barrel (2), the middle cylinder barrel (4) and the tail-end cylinder barrel (6) are equal, and the stroke of the piston rod assembly corresponding to each cylinder barrel is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121565535.5U CN215908175U (en) | 2021-07-08 | 2021-07-08 | Multi-stage hydraulic oil cylinder formed by connecting multiple hydraulic oil cylinders with same stroke in series |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121565535.5U CN215908175U (en) | 2021-07-08 | 2021-07-08 | Multi-stage hydraulic oil cylinder formed by connecting multiple hydraulic oil cylinders with same stroke in series |
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| CN215908175U true CN215908175U (en) | 2022-02-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992189A (en) * | 2022-08-03 | 2022-09-02 | 中国矿业大学(北京) | Dynamic-static coupling high stress multi-stage loading device and method |
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2021
- 2021-07-08 CN CN202121565535.5U patent/CN215908175U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992189A (en) * | 2022-08-03 | 2022-09-02 | 中国矿业大学(北京) | Dynamic-static coupling high stress multi-stage loading device and method |
| CN114992189B (en) * | 2022-08-03 | 2022-11-01 | 中国矿业大学(北京) | Dynamic-static coupling high stress multi-stage loading device and method |
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