CN212532094U - Sequential telescopic oil cylinder for crane - Google Patents
Sequential telescopic oil cylinder for crane Download PDFInfo
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- CN212532094U CN212532094U CN202021142941.6U CN202021142941U CN212532094U CN 212532094 U CN212532094 U CN 212532094U CN 202021142941 U CN202021142941 U CN 202021142941U CN 212532094 U CN212532094 U CN 212532094U
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Abstract
The utility model discloses a flexible hydro-cylinder of order for hoist belongs to order hydro-cylinder field. The utility model comprises a first-stage telescopic oil cylinder and a second-stage telescopic oil cylinder which have the same structure, and an oil path block is arranged at the top end of the cylinder body, and the oil path block and a core pipe arranged in the cylinder body form a seat valve sealing structure, thereby realizing the sequential extension of the first oil cylinder and the second oil cylinder; the limiting rod on the second-stage telescopic oil cylinder is in contact with the stroke valve of the first-stage telescopic oil cylinder and triggers the first-stage telescopic oil cylinder to work, so that the purpose of sequentially retracting the second oil cylinder and the first oil cylinder is achieved.
Description
Technical Field
The utility model relates to a sequence hydro-cylinder, concretely relates to flexible hydro-cylinder of order for hoist.
Background
When the engineering oil cylinders are used in series, due to the influence of friction force or load, the extension and the contraction of the oil cylinders are not sequential, namely, the oil cylinder is started to operate firstly when the friction force or the load on the oil cylinder is small. The sequence oil cylinder can realize sequence action according to design requirements and is not influenced by friction force and load. For example: the telescopic action of the telescopic arm on the lorry-mounted crane cannot meet the requirement of sequential action of a common engineering oil cylinder; and the sequential oil cylinder is not influenced by friction force and load, so that the telescopic arm can be sequentially stretched according to the design requirement.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flexible hydro-cylinder of order for hoist.
The technical scheme of the utility model is that: the utility model provides a flexible hydro-cylinder of order for hoist, includes two first order flexible hydro-cylinders and the flexible hydro-cylinder of second level that the structure is the same, first order flexible hydro-cylinder all includes oil circuit piece, cylinder body, piston rod and core pipe, connector with the flexible hydro-cylinder of second level, the oil circuit piece sets up the top at the cylinder body, the outside of cylinder body is equipped with hydraulic fluid port A and hydraulic fluid port B that are used for the hydraulic oil business turn over, and the connector setting forms confined inner chamber at the tail end of piston rod and with the piston rod cooperation, be equipped with hydraulic fluid port A1 and hydraulic fluid port B1 that are used for connecting the flexible hydro-cylinder business turn over hydraulic fluid port of second level on the connector of first order, piston rod and piston setting are in the inner chamber of cylinder body, and the piston is located the both ends of piston rod respectively with the connector, the piston separates into pole chamber and, the one end setting of core pipe is in the oil circuit piece and communicate with hydraulic fluid port A, the other end of core pipe is equipped with the oil outlet and is connected to hydraulic fluid port A1 on the connector through there being pole chamber core pipe, be formed with the pole chamber oil duct between hydraulic fluid port B and the hydraulic fluid port B1, still be equipped with the stroke valve in the connector, the one end and the hydraulic fluid port A1 intercommunication of stroke valve, the stroke valve other end passes through rodless chamber return oil pipe and piston intercommunication, be equipped with the gag lever post on the connector of the flexible hydro-cylinder of second grade, the top of gag lever post sets up in one side of the case of the flexible hydro-cylinder stroke valve of first order, when the piston rod of the flexible hydro-cylinder of second grade is.
According to the further technical scheme, an oil port A and an oil port B which are used for the hydraulic oil to enter and exit are formed in the outer side of the cylinder body of the first-stage telescopic oil cylinder and are respectively connected to the multi-way change valve through pipelines.
The utility model has the advantages that:
in the utility model, the oil path block at the top end of the first-stage telescopic oil cylinder and the core pipe arranged in the cylinder body form a seat valve sealing structure, thereby realizing the sequential extension of the first oil cylinder and the second oil cylinder; the limiting rod on the second-stage telescopic oil cylinder is in contact with the stroke valve of the first-stage telescopic oil cylinder and triggers the first-stage telescopic oil cylinder to work, so that the purpose of sequentially retracting the second oil cylinder and the first oil cylinder is achieved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The hydraulic control system comprises a first-stage telescopic oil cylinder, a second-stage telescopic oil cylinder, a piston rod, a core pipe, a rod cavity core pipe, a connector, a stroke valve, a multi-way change valve, a connecting head, a stroke valve, a multi-way change valve, a limiting rod, a first-stage telescopic oil cylinder, a second-stage telescopic oil cylinder, a piston rod, a core pipe, a.
Detailed Description
The invention will be further elucidated below by means of non-limiting examples, with the understanding that the invention is not limited thereto.
As shown in figure 1, the utility model relates to a sequential telescopic oil cylinder for a crane, which comprises a first-stage telescopic oil cylinder 1 and a second-stage telescopic oil cylinder 2 with the same structure, wherein the first-stage telescopic oil cylinder 1 and the second-stage telescopic oil cylinder 2 respectively comprise an oil path block 2, a cylinder body 4, a piston 5, a piston rod 6, a core pipe 7 and a connector 8, the oil path block 2 is arranged at the top end of the cylinder body 4, the outer side of the cylinder body 4 is provided with an oil port A and an oil port B for the inlet and outlet of hydraulic oil,
the connecting head 8 is arranged at the tail end of the piston rod 6 and is matched with the piston rod 6 to form a closed inner cavity, the connecting head 8 of the first-stage telescopic oil cylinder 1 is provided with an oil port A1 and an oil port B1 which are used for connecting an oil inlet and an oil outlet of the second-stage telescopic oil cylinder 2, the piston rod 6 and the piston 5 are arranged in the inner cavity of the cylinder body 4, the piston 5 and the connecting head 8 are respectively positioned at two ends of the piston rod 6, the inner cavity of the cylinder body 4 is divided into a rod cavity and a rodless cavity by the piston 5, the core tube 7 is hollow, the core tube 7 is arranged in the piston rod 6, one end of the core tube 7 is arranged in the oil path block 2 and is communicated with the oil port A, the other end of the core tube 7 is provided with an oil outlet and is connected to the oil port A1 on the connecting head 8 through a rod core tube cavity 71, a rod cavity oil path is formed between the oil port B1 of the oil port B and the, the connecting head 8 of the second-stage telescopic oil cylinder 2 is provided with a limiting rod 10, the top of the limiting rod 10 is arranged on one side of a valve core of a stroke valve 81 of the first-stage telescopic oil cylinder 1, and when a piston rod 6 of the second-stage telescopic oil cylinder 2 is retracted, the limiting rod 10 is in contact with the stroke valve 81 of the first-stage telescopic oil cylinder 1 and triggers the first-stage telescopic oil cylinder 1 to work.
An oil port A and an oil port B which are used for the inlet and outlet of hydraulic oil and arranged on the outer side of the cylinder body 4 of the first-stage telescopic oil cylinder 1 are respectively connected to a multi-way change valve 9 through pipelines. The multi-way change valve 9 has three positions: left, middle and right positions. Respectively controlling the telescopic oil cylinders: extending, stopping and retracting. The three positions of the multi-way change-over valve 9 are controlled and switched by a control handle or an electric control.
The specific working process is as follows:
the piston rod 6 extends forwards, pressure oil enters the oil path block 3 of the first-stage telescopic oil cylinder 4 through the multi-way valve, and because the seat valve is opened, the pressure oil can continuously enter the core pipe 7 and enter the first-stage telescopic oil cylinder 1, and at the moment, seat valve sealing is formed between the oil path block 3 and the core pipe 7, and the pressure oil cannot enter the second-stage telescopic oil cylinder 2; when the first-stage telescopic oil cylinder 1 is completely extended out, the oil cylinder rod cavity core pipe 71 drives the core pipe 7 to open the seat valve, pressure oil enters a bottom oil path block of the second-stage telescopic oil cylinder 2 through A1 and then enters a rodless cavity of the second-stage telescopic oil cylinder 2, and sequential extension of the telescopic arm oil cylinders is realized;
when the telescopic boom is controlled to retract, pressure oil simultaneously enters rod cavities of the first-stage telescopic oil cylinder 1 and the second-stage telescopic oil cylinder 2, but oil in a rodless cavity of the first-stage telescopic oil cylinder 1 cannot be released through the core pipe 7 due to the oil path block 2 at the bottom of the cylinder, so that the first-stage telescopic oil cylinder 1 cannot retract. When the second-stage telescopic oil cylinder 2 is completely retracted, the limiting rod 10 of the second-stage telescopic oil cylinder 2 is just contacted with the stroke valve 81, so that the stroke valve 81 is opened by switching the working position of the stroke valve 81, oil in the rodless cavity of the first-stage telescopic oil cylinder 1 enters the core pipe 7 through the stroke valve 81, the first-stage telescopic oil cylinder 1 returns oil, and the telescopic arm oil cylinders are sequentially retracted.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. The utility model provides a flexible hydro-cylinder of order for hoist, includes two first order flexible hydro-cylinders and the flexible hydro-cylinder of second level that the structure is the same, first order flexible hydro-cylinder all includes oil circuit piece, cylinder body, piston rod and core pipe, connector with the flexible hydro-cylinder of second level, the oil circuit piece sets up the top at the cylinder body, the outside of cylinder body is equipped with hydraulic fluid port A and hydraulic fluid port B that are used for the hydraulic oil business turn over, and the connector setting forms confined inner chamber at the tail end of piston rod and with the piston rod cooperation, be equipped with hydraulic fluid port A1 and hydraulic fluid port B1 that are used for connecting the flexible hydro-cylinder business turn over hydraulic fluid port of second level on the connector of first order, piston rod and piston setting are in the inner chamber of cylinder body, and the piston is located the both ends of piston rod respectively with the connector, the piston separates into pole chamber and, the one end setting of core pipe is in the oil circuit piece and communicate with hydraulic fluid port A, and the other end of core pipe is equipped with the oil outlet and is connected to hydraulic fluid port A1 on the connector through having the pole chamber core pipe, is formed with pole chamber oil duct, its characterized in that between hydraulic fluid port B and the hydraulic fluid port B1: still be equipped with the stroke valve in the connector, the one end and the hydraulic fluid port A1 intercommunication of stroke valve, the stroke valve other end passes through rodless chamber return oil pipe and piston intercommunication, be equipped with the gag lever post on the connector of second grade telescopic cylinder, the top of gag lever post sets up in one side of the case of first order telescopic cylinder stroke valve, and when the piston rod of second grade telescopic cylinder retrieved, the gag lever post contacted and triggered its work with the stroke valve of first order telescopic cylinder.
2. The sequential telescopic cylinder for the crane according to claim 1, wherein: and an oil port A and an oil port B for hydraulic oil to enter and exit are arranged on the outer side of the cylinder body of the first-stage telescopic oil cylinder and are respectively connected to the multi-way change valve through pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021142941.6U CN212532094U (en) | 2020-06-19 | 2020-06-19 | Sequential telescopic oil cylinder for crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021142941.6U CN212532094U (en) | 2020-06-19 | 2020-06-19 | Sequential telescopic oil cylinder for crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212532094U true CN212532094U (en) | 2021-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021142941.6U Active CN212532094U (en) | 2020-06-19 | 2020-06-19 | Sequential telescopic oil cylinder for crane |
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| Country | Link |
|---|---|
| CN (1) | CN212532094U (en) |
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2020
- 2020-06-19 CN CN202021142941.6U patent/CN212532094U/en active Active
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