CN220581414U - Sequential telescopic oil cylinder - Google Patents
Sequential telescopic oil cylinder Download PDFInfo
- Publication number
- CN220581414U CN220581414U CN202321880908.7U CN202321880908U CN220581414U CN 220581414 U CN220581414 U CN 220581414U CN 202321880908 U CN202321880908 U CN 202321880908U CN 220581414 U CN220581414 U CN 220581414U
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- oil
- cylinder
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- way
- oil outlet
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 230000003139 buffering effect Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000008602 contraction Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Abstract
The utility model provides a sequential telescopic oil cylinder, which comprises a plurality of driving oil cylinders, wherein an oil outlet oil way of a connecting seat of a former driving oil cylinder is connected with an oil inlet oil way of a cylinder cover of a latter driving oil cylinder; the oil outlet joint oil way of the latter driving oil cylinder is connected with the oil inlet oil way of the connecting seat of the former driving oil cylinder; the driving oil cylinder comprises a cylinder body, a piston rod and a piston, wherein one end of the cylinder body is welded with a cylinder cover, the other end of the inner cavity of the cylinder body is sleeved with an end ring, the piston is sleeved in the cylinder body, one end of the piston rod penetrates through the end ring to be connected with the piston, and the other end of the piston rod is connected with the connecting seat; the cylinder body in the end ring direction is provided with a cylinder body oil outlet hole penetrating through the inside and the outside, an oil outlet connector is fixed on the cylinder body outside the cylinder body oil outlet hole, and an oil outlet connector oil way is arranged on the oil outlet connector.
Description
Technical Field
The utility model relates to the technical field of oil cylinders, in particular to a sequential telescopic oil cylinder.
Background
The crane carries articles through telescopic arms, the telescopic arms are usually provided with a plurality of sections of arms, such as four sections, five sections and the like, the telescopic arms are usually driven by hydraulic cylinders, oil tanks are arranged on the crane and supply oil for the hydraulic cylinders, the gap is designed to be smaller according to the specific requirement of buffering, the oil cannot pass through quickly, when the telescopic arms need to be stretched, the oil in a rodless cavity can cause the condition that the pressure is too high or can not stretch out due to the fact that the starting area is too small (pressure=pressure, the stressed area), the telescopic rods need to stretch out, a force with a fixed size is required, the stressed area is reduced, and if the same force needs to be applied, the internal pressure is required to be higher, so that the danger is caused by too high oil pressure.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a sequential telescopic oil cylinder.
In order to achieve the above purpose, the technical scheme provided by the utility model is as follows: a sequential telescopic oil cylinder comprises a plurality of driving oil cylinders, wherein an oil outlet oil way of a connecting seat of a former driving oil cylinder is connected with an oil inlet oil way of a cylinder cover of a latter driving oil cylinder; the oil outlet joint oil way of the latter driving oil cylinder is connected with the oil inlet oil way of the connecting seat of the former driving oil cylinder; the driving oil cylinder comprises a cylinder body, a piston rod and a piston, wherein one end of the cylinder body is welded with a cylinder cover, the other end of the inner cavity of the cylinder body is sleeved with an end ring, the piston is sleeved in the cylinder body, one end of the piston rod penetrates through the end ring to be connected with the piston, and the other end of the piston rod is connected with the connecting seat; the cylinder body in the end ring direction is provided with a cylinder body oil outlet hole penetrating through the inside and the outside, an oil outlet connector is fixed on the cylinder body outside the cylinder body oil outlet hole, and an oil outlet connector oil way is arranged on the oil outlet connector.
The piston is cylindrical, one end of the piston is sealed to form a sealed end, a buffer sleeve is formed outside the end part of the sealed end in an extending mode, a first oil inlet channel penetrates through the buffer sleeve, a second oil outlet channel is located at the open end of the piston, an oil outlet plug is arranged on a piston rod in the cylinder body, the outer end of the oil outlet plug is contracted to form a stepped connecting section, the connecting section is sleeved with the open end of the piston and connected with the open end of the piston, and a connecting channel connected with the second oil outlet channel and the first oil outlet channel is arranged on the connecting section.
The cylinder cover is provided with a cylinder cover oil inlet oil way which penetrates through the inside and the outside, the piston is provided with a first oil inlet channel which penetrates through the two ends, the piston rod is provided with a second oil inlet channel, and the connecting seat is provided with a connecting seat oil outlet oil way; one end of the first oil inlet channel is matched with an oil inlet circuit of the cylinder cover, the other end of the first oil inlet channel is connected with one end of the second oil inlet channel, and the other end of the second oil inlet channel is connected with an oil outlet circuit of the connecting seat.
The connecting seat on be equipped with connecting seat oil feed oil circuit, be equipped with first oil outlet channel on the piston rod, be equipped with the second oil outlet channel in the piston, wherein, one end of first oil outlet channel is connected with connecting seat oil feed oil circuit, first oil outlet channel other end is connected with second oil outlet channel one end, the second oil outlet channel other end wears out from forming the piston oil-out on the outer peripheral face of one of them side of piston, piston oil-out and cylinder body oil outlet assorted.
And one-way valves are arranged in the cylinder cover oil inlet oil way, the oil outlet joint oil way and the connecting seat oil inlet oil way.
The outer peripheral surface of the end ring is sealed with the inner cavity wall of the cylinder body through a sealing ring, and the sizes of the driving cylinders are different.
A bypass is arranged between the sealing end of the piston and the cylinder cover oil inlet oil way, a rodless cavity one-way valve is arranged on the bypass, and the flow direction of the rodless cavity one-way valve is the sealing end of the cylinder cover oil inlet oil way flowing to the piston.
After the scheme is adopted, when the oil cylinders need to be contracted, as the two sides of the one-way valve are communicated, the pressure is the same, the one-way valve does not act, the oil liquid of each oil cylinder with a rod cavity is communicated, at the moment, as the oil injection is started, the oil pressure rises, the oil pressure in the rod cavity needed when the oil cylinders with large sizes are contracted due to different sizes of the multi-stage oil cylinders, the oil cylinder with the largest first stage size is contracted first, after the first stage contraction is finished, the two sides of the one-way valve are not communicated, at the moment, the oil injection is continued, the oil pressure rises, the one-way valve is opened, the continuous synchronous rising of the oil pressure of the rod cavity of the subsequent oil cylinder is realized, until the oil cylinder with the second next stage size is contracted, and the like, so that the aim of sequential expansion is fulfilled. After this scheme adopted the check valve, oil just got into the bigger cavity of start area along the oil circuit direction when getting into rodless chamber, made the hydro-cylinder can normally start.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a cross-sectional view of the present utility model.
Detailed Description
The utility model is further described below with reference to all drawings, in which preferred embodiments of the utility model are: referring to fig. 1 and fig. 2, a sequential telescopic cylinder according to this embodiment includes a plurality of driving cylinders, where an oil outlet path of a connecting seat of a previous driving cylinder is connected with an oil inlet path of a cylinder cover of a next driving cylinder; the oil outlet joint oil way of the latter driving oil cylinder is connected with the oil inlet oil way of the connecting seat of the former driving oil cylinder; the driving oil cylinder comprises a cylinder body 2, a piston rod 3 and a piston 4, wherein one end of the cylinder body 2 is welded with a cylinder cover 5, the other end of the inner cavity of the cylinder body 2 is sleeved with an end ring 6, the outer peripheral surface of the end ring 6 is sealed with the inner cavity wall of the cylinder body 2 through a sealing ring, and the sizes of the driving oil cylinders are different. The piston 4 is sleeved in the cylinder body 2, one end of the piston rod 3 penetrates through the end ring 6 to be connected with the piston 4, and the other end of the piston rod 3 is connected with the connecting seat 9; the cylinder body 2 in the direction of the end ring 6 is provided with a cylinder body oil outlet hole penetrating through the inside and the outside, the cylinder body 2 outside the cylinder body oil outlet hole is fixedly provided with an oil outlet joint 11, and the oil outlet joint 11 is provided with an oil outlet joint oil way 12.
The piston 4 is cylindrical, one end of the piston 4 is sealed to form a sealed end, a buffer sleeve is formed outside the end part of the sealed end in an extending mode, the first oil inlet channel 8 penetrates through the buffer sleeve, the second oil outlet channel is located at the opening end of the piston 4, an oil outlet plug is arranged on the piston rod 3 in the cylinder body 2, the outer end of the oil outlet plug is contracted to form a stepped connecting section, the connecting section is sleeved with the opening end of the piston 4 and connected with the piston 4, and a connecting channel connected with the second oil outlet channel 16 and the first oil outlet channel 15 is arranged on the connecting section.
The cylinder cover 5 is provided with a cylinder cover oil inlet oil way 7 which penetrates through the inside and the outside, the piston 4 is provided with a first oil inlet channel 8 which penetrates through the two ends, the piston rod 3 is provided with a second oil inlet channel 13, and the connecting seat 9 is provided with a connecting seat oil outlet oil way 10; one end of the first oil inlet channel 8 is matched with the cylinder cover oil inlet channel 7, the other end of the first oil inlet channel 8 is connected with one end of the second oil inlet channel 13, and the other end of the second oil inlet channel 13 is connected with the connecting seat oil outlet channel 10.
The connecting seat 9 is provided with a connecting seat oil inlet oil way 14, the piston rod 3 is provided with a first oil outlet channel 15, the piston 4 is internally provided with a second oil outlet channel 16, one end of the first oil outlet channel 15 is connected with the connecting seat oil inlet oil way 14, the other end of the first oil outlet channel 15 is connected with one end of the second oil outlet channel 16, the other end of the second oil outlet channel 16 penetrates out from the outer peripheral surface of one side of the piston 4 to form a piston oil outlet, and the piston oil outlet is matched with a cylinder body oil outlet. The cylinder cover oil inlet oil way 7, the oil outlet joint oil way 12 and the connecting seat oil inlet oil way 14 are respectively provided with a one-way valve.
Referring to fig. 1, the hydraulic cylinder is divided into numbers 1, 2 and 3 from top to bottom, an entering end of the hydraulic cylinder is a rodless cavity oil way, a rod cavity oil way is arranged between the outer peripheral surface of a piston and the inner cavity wall of a cylinder body, a telescopic area of the piston is a rod body, an inner cavity and an inner tube (the inner tube passes through the inner cavity and is arranged in the inner cavity) are arranged in the rod body, the inner cavity is a part of the rod cavity oil way, and the inner tube is a part of the rodless cavity oil way; the flow direction of the one-way valve on the rod body side can only be inwards;
a rodless cavity check valve is formed between the sealing end of the piston 4 and the cylinder cover oil inlet oil way 7, and gap buffering is formed through the rodless cavity check valve, and the principle of the gap buffering is as follows: when the buffer sleeve at the bottom of the piston rod is about to be embedded into the cylinder cover oil inlet oil way 7, the outflow area of the oil way starts to be reduced, and after the buffer sleeve is embedded into the cylinder cover oil inlet oil way 7, the oil way flows out through a gap between the buffer sleeve and the cylinder cover oil inlet oil way 7, so that the flow speed is further reduced, and the speed of the piston rod is synchronously reduced when the piston rod is contracted to the head, so that the gap buffering is realized;
according to the specific requirement of buffering, the gap is designed to be smaller, oil cannot pass through quickly, when the oil needs to stretch, if a rodless cavity one-way valve is not arranged, the oil in the rodless cavity is too small in starting area because the starting surface only comprises a buffer sleeve at the bottom of a piston rod, so that the pressure is too high or insufficient in pressure cannot stretch out (pressure=pressure, stressed area, telescopic rod needs to stretch out, force with a fixed size is required, stressed area is reduced, and if the same force is required, the internal pressure is required to be higher, so that the danger is caused by too high oil pressure); after the rodless cavity check valve is adopted, oil advances along the pushing direction of the rodless cavity check valve when entering the rodless cavity, and enters the cavity with larger starting area, so that the oil cylinder can be started normally.
The specific application is as follows:
starting from the state that all the cylinders are in contraction, the cylinders are divided into cylinders 1, 2 and 3 from top to bottom;
1. 2, the oil cylinders No. 3 are in a fully contracted state;
the oil is fed into the rodless cavity No. 1, the oil is discharged from the rod cavity No. 1, the rod body No. 1 is elongated, and other cavities are unchanged;
the rod body 1 extends to the top, an oil outlet channel on the side of the rod body 1 is communicated with a side outlet 1, a rod cavity 2 is used for discharging oil, oil is discharged from the side outlet 2, enters the inner cavity of the rod body 1, is discharged from the oil outlet channel and the side outlet 1, and the rod body 2 starts to extend; the rod body 1 is not stretched to the top, and the oil outlet channel on the edge of the rod body 1 is not communicated with the side outlet 1, so that the rod cavity 2 cannot discharge oil, the rod body 2 is not stretched, and sequential stretching is realized.
Similarly, the rod body No. 2 extends to the top, an oil outlet channel on the edge of the rod body No. 2 is communicated with a side outlet No. 2, a rod cavity No. 3 is used for discharging oil, oil is discharged from the side outlet No. 3 and enters the inner cavity of the rod body No. 2, then is discharged from the oil outlet channel and the side outlet No. 2, the rod body No. 3 starts to extend, and the like, and the subsequent increasing number is the same operation flow.
When the oil cylinders need to shrink, because the two sides of the check valve are communicated, the pressure is the same, the check valve does not act, the oil liquid in each oil cylinder with a rod cavity is communicated, at the moment, along with the starting of oil injection, the oil pressure rises, the oil pressure in the rod cavity is required to be smaller when the oil cylinder with large size shrinks due to different sizes of the multi-stage oil cylinders, therefore, the oil cylinder with the largest first-stage size shrinks firstly, after the first-stage shrinkage is finished, the two sides of the check valve are not communicated, at the moment, the oil injection is continued, the oil pressure rises, the check valve is opened, the synchronous rising of the oil pressure in the rod cavity of the subsequent oil cylinder is realized, until the oil cylinder with the second next-stage size row begins to shrink, and the like, thereby completing the purpose of sequential shrinkage.
The above-mentioned embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model, so that all changes made in the shape and principles of the present utility model are covered by the scope of the present utility model.
Claims (7)
1. The utility model provides a flexible hydro-cylinder of order, it includes a plurality of actuating cylinder, its characterized in that: the oil outlet oil way of the connecting seat of the former driving oil cylinder is connected with the oil inlet oil way of the cylinder cover of the latter driving oil cylinder; the oil outlet joint oil way of the latter driving oil cylinder is connected with the oil inlet oil way of the connecting seat of the former driving oil cylinder; the driving oil cylinder comprises a cylinder body (2), a piston rod (3) and a piston (4), wherein one end of the cylinder body (2) is welded with a cylinder cover (5), the other end of the inner cavity of the cylinder body (2) is sleeved with an end ring (6), the piston (4) is sleeved in the cylinder body (2), one end of the piston rod (3) penetrates through the end ring (6) to be connected with the piston (4), and the other end of the piston rod (3) is connected with a connecting seat (9); the cylinder body (2) in the direction of the end ring (6) is provided with a cylinder body oil outlet hole penetrating through the inside and the outside, the cylinder body (2) outside the cylinder body oil outlet hole is fixedly provided with an oil outlet joint (11), and the oil outlet joint (11) is provided with an oil outlet joint oil way (12).
2. A sequential telescopic ram according to claim 1, wherein: the piston (4) is the cylinder, wherein one end seals and forms sealed end, and sealed end tip outside extends and is formed with the buffer collar, and first oil feed passageway (8) run through in the buffer collar, and second oil outlet channel is located piston (4) open end, is equipped with out the oil plug on piston rod (3) in cylinder body (2), and the outer end shrink of oil plug forms the linkage segment of echelonment, and the linkage segment is connected with the open end cover of piston (4), is equipped with the connecting channel that is connected with second oil outlet channel (16), first oil outlet channel (15) on the linkage segment.
3. A sequential telescopic ram according to claim 1, wherein: the cylinder cover (5) is provided with a cylinder cover oil inlet oil way (7) which penetrates through the inside and the outside, the piston (4) is provided with a first oil inlet channel (8) which penetrates through the two ends, the piston rod (3) is provided with a second oil inlet channel (13), and the connecting seat (9) is provided with a connecting seat oil outlet oil way (10); one end of the first oil inlet channel (8) is matched with the oil inlet oil way (7) of the cylinder cover, the other end of the first oil inlet channel (8) is connected with one end of the second oil inlet channel (13), and the other end of the second oil inlet channel (13) is connected with the oil outlet oil way (10) of the connecting seat.
4. A sequential telescopic ram according to claim 1, wherein: be equipped with connecting seat oil feed oil circuit (14) on connecting seat (9), be equipped with first oil outlet channel (15) on piston rod (3), be equipped with second oil outlet channel (16) in piston (4), wherein, first oil outlet channel (15) wherein one end is connected with connecting seat oil feed oil circuit (14), first oil outlet channel (15) other end is connected with second oil outlet channel (16) one end, wear out on the outer peripheral surface of second oil outlet channel (16) other end by piston (4) wherein one side and form the piston oil-out, piston oil-out and cylinder body oil outlet phase-match.
5. A sequential telescopic ram according to claim 1, wherein: the cylinder cover oil inlet oil way (7), the oil outlet joint oil way (12) and the connecting seat oil inlet oil way (14) are respectively provided with a one-way valve.
6. A sequential telescopic ram according to claim 1, wherein: the peripheral surface of the end ring (6) is sealed with the inner cavity wall of the cylinder body (2) through a sealing ring, and the sizes of all the driving cylinders are different.
7. A sequential telescopic ram according to claim 1, wherein: a bypass is arranged between the sealing end of the piston (4) and the cylinder cover oil inlet oil way (7), and a rodless cavity one-way valve is arranged on the bypass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321880908.7U CN220581414U (en) | 2023-07-18 | 2023-07-18 | Sequential telescopic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321880908.7U CN220581414U (en) | 2023-07-18 | 2023-07-18 | Sequential telescopic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220581414U true CN220581414U (en) | 2024-03-12 |
Family
ID=90113453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321880908.7U Active CN220581414U (en) | 2023-07-18 | 2023-07-18 | Sequential telescopic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220581414U (en) |
-
2023
- 2023-07-18 CN CN202321880908.7U patent/CN220581414U/en active Active
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