CN215950019U - Sequence oil cylinder - Google Patents
Sequence oil cylinder Download PDFInfo
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- CN215950019U CN215950019U CN202122188577.8U CN202122188577U CN215950019U CN 215950019 U CN215950019 U CN 215950019U CN 202122188577 U CN202122188577 U CN 202122188577U CN 215950019 U CN215950019 U CN 215950019U
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Abstract
The utility model relates to a sequence oil cylinder, which comprises a cylinder body and a piston rod, wherein the cylinder body is provided with a flow control part, and the piston rod is provided with: the first channel is communicated with the rod cavity of the cylinder body and the rod cavity of the lower-stage oil cylinder; the second passageway communicates with the rodless chamber of subordinate's hydro-cylinder, and second passageway and accuse flow portion sliding fit, accuse flow portion are used for controlling the break-make between the rodless chamber of second passageway and hydro-cylinder, and accuse flow portion configures to: when the piston rod is fully extended out of the cylinder body, the flow control part is communicated with the second channel and the rodless cavity of the cylinder body. The flow of hydraulic oil is not controlled by using a sequence valve, and the hydraulic system does not need to overcome the opening pressure of the sequence valve to pump the hydraulic oil when working, so that the output pressure of the multi-stage oil cylinder is increased under the condition that the pressure of the hydraulic oil of the hydraulic system is not changed, and the working efficiency of the multi-stage oil cylinder is improved. Meanwhile, the elimination of the sequence valve can reduce the space size of the hydraulic system and reduce the configuration cost of the hydraulic system.
Description
Technical Field
The utility model relates to the field of hydraulic equipment, in particular to a sequence oil cylinder.
Background
In a hydraulic system in which multiple cylinders are connected in parallel, a sequence valve is generally provided to control the flow of hydraulic oil, so that the cylinders are extended in sequence from the adjacent lower-stage cylinders. The mode of controlling the operation of the multi-stage oil cylinder by using the oil cylinder sequence valve has the following defects:
1. the hydraulic system needs to overcome the opening pressure of the sequence valve to pump hydraulic oil, so that the output pressure of the multi-stage oil cylinder is smaller than the hydraulic oil pressure of the hydraulic system, and the working efficiency of the multi-stage oil cylinder is reduced;
2. installing the sequence valve increases the spatial size of the hydraulic system and increases the cost of configuring the hydraulic system.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a sequence cylinder to solve one or more problems of the prior art.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
a sequence oil cylinder comprises a cylinder body and a piston rod, wherein the cylinder body is provided with a flow control part, and the piston rod is provided with a
The first channel is communicated with the rod cavity of the cylinder body and the rod cavity of the lower-stage oil cylinder;
the second channel is communicated with a rodless cavity of a lower-stage oil cylinder, the second channel is in sliding fit with the flow control part, the flow control part is used for controlling the on-off between the second channel and the rodless cavity of the oil cylinder, and the flow control part is configured as follows:
when the piston rod is fully extended out of the cylinder body, the flow control part is communicated with the second channel and the rodless cavity of the cylinder body.
Further, a side surface of the flow control portion has an oil hole communicating with the second passage, the oil hole being configured to:
when the piston rod does not extend out of the cylinder body completely, the side surface of the flow control part is attached to the side wall of the second channel so as to seal the oil hole;
when the piston rod is fully extended from the cylinder block, the oil hole is exposed from the second passage and communicates with the rodless chamber of the cylinder block.
Furthermore, the flow control part and the second channel are arranged along the axis of the piston rod, and the flow control part is attached to the side wall of the second channel.
Furthermore, a groove is formed in the far end face of the flow control portion along the axis direction of the flow control portion, and the oil hole is communicated with the groove.
Furthermore, a plurality of oil holes are formed in the oil hole, and the oil holes are arranged around the circumferential direction of the flow control portion.
Further, the piston rod is provided with an inner cavity, the piston rod is provided with a first hole and a second hole, the first hole is communicated with the inner cavity and the rod cavity of the cylinder body, the second hole is communicated with the inner cavity and the rod cavity of the lower-level oil cylinder, and the inner cavity, the first hole and the second hole form the first channel.
Further, the piston rod comprises a first tube body, a first sealing portion arranged at the proximal end of the first tube body and a second sealing portion arranged at the distal end of the first tube body, and the inner cavity is a space enclosed by the first tube body, the first sealing portion and the second sealing portion.
Further, a third hole has been seted up to first sealing, the third hole with the no-rod cavity intercommunication of cylinder body, the fourth hole has been seted up to the second sealing, the fourth hole communicates with the no-rod cavity of subordinate's hydro-cylinder, the third hole with be equipped with second body intercommunication between the fourth hole, the hole of second body the third hole and the fourth hole is constituteed the second passageway.
Further, the far end of the flow control part penetrates through the third hole and is inserted into the second pipe body, and the side face of the flow control part is attached to the side wall of the second pipe body.
Furthermore, a first groove is formed in the edge of the far end of the third hole, a second groove is formed in the edge of the near end of the fourth hole, and the two ends of the second pipe body are respectively inserted into the first groove and the second groove.
Compared with the prior art, the utility model has the following beneficial technical effects:
when the sequential oil cylinder is used, hydraulic oil is pumped to the rodless cavity of the cylinder body to push the piston rod to extend out of the cylinder body. When the piston rod extends out of the cylinder body completely, the flow control part is communicated with the second channel and the rodless cavity of the cylinder body, hydraulic oil can enter the rodless cavity of the lower-stage oil cylinder through the second channel, and the piston rod of the lower-stage oil cylinder is pushed to extend out. In the scheme, the sequence valve is not used for controlling the flow of the hydraulic oil, and the hydraulic system does not need to overcome the opening pressure of the sequence valve to pump the hydraulic oil when working, so that the output pressure of the multi-stage oil cylinder is increased under the condition that the pressure of the hydraulic oil of the hydraulic system is not changed, and the working efficiency of the multi-stage oil cylinder is improved. Meanwhile, the elimination of the sequence valve can reduce the space size of the hydraulic system and reduce the configuration cost of the hydraulic system.
The flow control part is communicated with the rodless cavity of the cylinder body and the second channel through the oil hole, and when the piston rod does not completely extend out of the cylinder body, the flow control part is attached to the side wall of the second channel to seal the oil hole; when the piston rod extends out of the cylinder body completely, the oil hole is exposed out of the second channel and communicated with the rodless cavity of the cylinder body, so that hydraulic oil in the rodless cavity of the cylinder body flows into the second channel and enters the rodless cavity of the lower-stage oil cylinder to push the piston rod of the lower-stage oil cylinder to extend out. In the scheme, the lower-stage oil cylinder is controlled to operate after the piston rod is completely extended through the position provided with the oil hole, the control structure is simple, and the configuration cost of a hydraulic system is reduced.
And (III) a plurality of oil holes are formed, so that hydraulic oil in the rodless cavity of the cylinder body can uniformly flow into the groove along the circumferential direction of the piston rod.
Drawings
FIG. 1 is a schematic diagram showing the structure of a sequence cylinder in the embodiment of the utility model;
FIG. 2 shows a schematic view of the engagement of the cylinder and the piston rod in an embodiment of the utility model;
FIG. 3 shows an enlarged view at A in FIG. 2;
fig. 4 shows an enlarged view at B in fig. 2.
In the drawings, the reference numbers:
1. a cylinder body; 11. a first opening; 12. a second opening; 13. a flow control part; 131. a groove; 132. an oil hole; 2. a piston rod; 21. a first pipe body; 211. a first hole; 22. a first seal portion; 221. a third aperture; 222. a first groove; 23. a second seal portion; 231. a second hole; 232. a fourth aperture; 233. a second groove; 24. a second tube.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, a sequence cylinder according to the present invention will be described in detail with reference to the accompanying drawings and the following detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
To more clearly describe the above sequence cylinder, the present invention defines the terms "proximal" and "distal", specifically, "proximal" means the end adjacent to the first opening; "distal end" means the end distal to the first opening. Taking fig. 1 as an example, the lower side of fig. 1 is the proximal end, and the upper side of fig. 1 is the distal end.
Examples
Referring to fig. 1 to 3, the present application provides a sequential cylinder, which includes a cylinder body 1 and a piston rod 2, wherein a first opening 11 and a second opening 12 are formed in a side surface of the cylinder body 1, the first opening 11 is communicated with a rodless cavity of the cylinder body 1, and the second opening 12 is communicated with a rod cavity of the cylinder body 1. The cylinder 1 is also provided with a flow control part 13, and the piston rod 2 is provided with:
the first channel is communicated with the rod cavity of the cylinder body 1 and the rod cavity of the lower-stage oil cylinder;
the second channel is communicated with a rodless cavity of the lower-stage oil cylinder, the second channel is in sliding fit with the flow control part 13, the flow control part 13 is used for controlling the on-off between the second channel and the rodless cavity of the oil cylinder, and the flow control part 13 is configured as follows:
when the piston rod 2 is fully extended from the cylinder 1, the flow control portion 13 communicates with the second passage and the rodless chamber of the cylinder 1. The piston rod 2 mentioned in the embodiment is completely extended from the cylinder body 1, which means that the hydraulic oil pushes the piston rod 2 to be extended from the cylinder body 1 to the longest state when the sequence cylinder is in normal operation.
When the sequential oil cylinder is used, hydraulic oil is pumped to the rodless cavity of the cylinder body 1 through the first opening 11, and the piston rod 2 is pushed to extend out of the cylinder body 1. When the piston rod 2 is completely extended out of the cylinder body 1, the flow control part 13 communicates the second channel with the rodless cavity of the cylinder body 1, so that hydraulic oil can enter the rodless cavity of the lower-stage oil cylinder through the second channel and push the piston rod 2 of the lower-stage oil cylinder to extend out.
Referring to fig. 1 to 3, the following describes a specific structure of the flow control portion 13 as follows:
the flow control part 13 and the second channel are arranged along the axial direction of the piston rod 2, the flow control part 13 is rod-shaped, the near end of the flow control part 13 is welded and fixed on the near end surface of the inner wall of the cylinder body 1, the far end of the flow control part 13 is inserted into the second channel, and the side surface of the flow control part 13 is attached to the side wall of the second channel. The distal end surface of flow control portion 13 is equipped with recess 131, and recess 131 sets up along the axial direction of flow control portion 13.
Eight oil holes 132 are further formed in the side face of the flow control portion 13, the eight oil holes 132 are divided into two groups, the four oil holes 132 in the same group are uniformly arranged along the circumferential direction of the flow control portion 13, and each oil hole 132 is communicated with the groove 131. When the piston rod 2 does not fully extend out of the cylinder 1, the side surface of the flow control part 13 is attached to the side wall of the second passage, i.e., the oil hole 132 is closed by the side wall of the second passage; when the piston rod 2 is fully extended from the cylinder block 1, the oil hole 132 is exposed from the second passage and communicates with the rodless chamber of the cylinder block 1.
Referring to fig. 1 to 4, the following describes a specific structure of the piston rod 2 as follows:
the piston rod 2 comprises a first tube 21, a first sealing portion 22 arranged at the proximal end of the first tube 21 and a second sealing portion 23 arranged at the distal end of the first tube 21, and a space enclosed among the first tube 21, the first sealing portion 22 and the second sealing portion 23 is an inner cavity. In this embodiment, the first sealing portion 22 and the second sealing portion 23 are both welded and fixed to the first pipe 21, but the first sealing portion 22 and the second sealing portion 23 may also be detachably connected to the first pipe 21 by a threaded connection.
Specifically, the outer side of the first sealing portion 22 is sleeved with a piston, four first holes 211 are further formed in the side face of the first sealing portion 22, and the four first holes 211 are uniformly arranged along the circumferential direction of the first pipe body 21. The first hole 211 is used for communicating the inner cavity with a rod cavity of the cylinder body 1, the second sealing portion 23 is provided with a second hole 231, the second hole 231 is used for communicating the inner cavity with the rod cavity of the lower-stage oil cylinder, and the inner cavity, the first hole 211 and the second hole 231 form a first channel.
The first sealing portion 22 is opened with a third hole 221, the third hole 221 penetrates the first sealing portion 22 along the axis of the first pipe 21, and the third hole 221 communicates with the rodless cavity of the cylinder 1. The second sealing portion 23 is provided with a fourth hole 232, the fourth hole 232 is communicated with a rodless cavity of the lower-stage oil cylinder, a second pipe body 24 is arranged between the third hole 221 and the fourth hole 232 to be communicated, one end of the second pipe body 24 is inserted into the third hole 221, the other end of the second pipe body 24 is inserted into the fourth hole 232, and a second channel is formed by an inner hole of the second pipe body 24, the third hole 221 and the fourth hole 232. The distal end of the flow control portion 13 passes through the third hole 221 and is inserted into the second tube 24, the side surface of the flow control portion 13 is attached to the side walls of the second tube 24 and the third hole 221, and the flow control portion 13 slides relative to the side walls of the second tube 24 and the third hole 221.
Further, an annular first groove 222 is formed in the edge of the far end of the third hole 221, the first groove 222 coincides with the axis of the third hole 221, an annular second groove 233 is formed in the edge of the near end of the fourth hole 232, the second groove 233 coincides with the axis of the fourth hole 232, and the two ends of the second tube 24 are inserted into the first groove 222 and the second groove 233 respectively.
Specifically, the second hole 231 and the fourth hole 232 are connected to an oil delivery pipeline (not shown in the figure), the second hole 231 is communicated with the rod cavity of the lower stage oil cylinder through the oil delivery pipeline, and the fourth hole 232 is communicated with the rodless cavity of the lower stage oil cylinder through the oil delivery pipeline. In this embodiment, the side surface of the second sealing portion 23 is opened with a through hole to facilitate connection of the pushed member. In order to avoid the through holes, the second hole 231 and the fourth hole 232 each include three sequentially connected hole sections, and adjacent hole sections are perpendicular to each other. For the second hole 231 and the fourth hole 232, in the continuous three hole sections, two hole sections are arranged on the outer side surface of the second sealing portion 23, so that the opening of one hole section needs to be closed, the mode of closing the opening of the hole section can be selected, a pin can be inserted into one hole section, the pin is in interference fit with the hole section, the opening of the hole section is closed, and only two ends of the three continuous hole sections are provided with openings.
The working principle is as follows:
hydraulic oil is pumped into the rodless cavity of the cylinder 1 through the first opening 11, and the piston rod 2 is pushed to extend out of the cylinder 1. When the piston rod 2 is completely extended out of the cylinder body 1, the oil hole 132 is exposed out of the second passage to communicate the second passage with the rodless cavity of the cylinder body 1, and hydraulic oil enters the rodless cavity of the lower-stage cylinder to push the piston rod 2 of the lower-stage cylinder to extend out. Since the sequence valve is omitted in this solution. When the hydraulic system works, hydraulic oil is pumped without overcoming the opening pressure of the sequence valve, so that the output pressure of the multi-stage oil cylinder can be increased under the condition that the hydraulic oil pressure of the hydraulic system is not changed, and the working efficiency of the multi-stage oil cylinder is improved. Meanwhile, the elimination of the sequence valve can reduce the space size of the hydraulic system and reduce the configuration cost of the hydraulic system.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a sequence hydro-cylinder, includes cylinder body and piston rod, its characterized in that: the cylinder body is provided with a flow control part, and the piston rod is provided with
The first channel is communicated with the rod cavity of the cylinder body and the rod cavity of the lower-stage oil cylinder;
the second channel is communicated with a rodless cavity of a lower-stage oil cylinder, the second channel is in sliding fit with the flow control part, the flow control part is used for controlling the on-off between the second channel and the rodless cavity of the oil cylinder, and the flow control part is configured as follows:
when the piston rod is fully extended out of the cylinder body, the flow control part is communicated with the second channel and the rodless cavity of the cylinder body.
2. The sequence cylinder as claimed in claim 1, wherein: the side of the flow control part is provided with an oil hole which is communicated with the second channel, and the oil hole is configured as follows:
when the piston rod does not extend out of the cylinder body completely, the side surface of the flow control part is attached to the side wall of the second channel so as to seal the oil hole;
when the piston rod is fully extended from the cylinder block, the oil hole is exposed from the second passage and communicates with the rodless chamber of the cylinder block.
3. A sequence cylinder as claimed in claim 2, wherein: the flow control part and the second channel are arranged along the axis of the piston rod, and the flow control part is attached to the side wall of the second channel.
4. A sequence cylinder as claimed in claim 3, wherein: the far end face of the flow control part is provided with a groove along the axis direction of the flow control part, and the oil hole is communicated with the groove.
5. The sequence cylinder as claimed in claim 4, wherein: the oil holes are provided with a plurality of oil holes which are arranged around the circumferential direction of the flow control part.
6. The sequence cylinder as claimed in claim 1, wherein: the piston rod is provided with an inner cavity, the piston rod is provided with a first hole and a second hole, the first hole is communicated with the inner cavity and a rod cavity of the cylinder body, the second hole is communicated with the inner cavity and a rod cavity of a lower-level oil cylinder, and the inner cavity, the first hole and the second hole form a first channel.
7. The sequence cylinder as claimed in claim 6, wherein: the piston rod comprises a first tube body, a first sealing portion and a second sealing portion, the first sealing portion is arranged at the near end of the first tube body, the second sealing portion is arranged at the far end of the first tube body, and the inner cavity is a space enclosed by the first tube body, the first sealing portion and the second sealing portion.
8. The sequence cylinder as claimed in claim 7, wherein: the third hole has been seted up to first sealing, the third hole with the no pole chamber intercommunication of cylinder body, the fourth hole has been seted up to the second sealing, the no pole chamber intercommunication of fourth hole and subordinate's hydro-cylinder, the third hole with be equipped with second body intercommunication between the fourth hole, the hole of second body the third hole and the fourth hole is constituteed the second passageway.
9. The sequence cylinder as claimed in claim 8, wherein: the far end of the flow control part penetrates through the third hole and is inserted into the second pipe body, and the side face of the flow control part is attached to the side wall of the second pipe body.
10. The sequence cylinder as claimed in claim 8, wherein: the first groove has been seted up at the distal end border of third hole, the second groove has been seted up at the near-end border of fourth hole, the both ends of second body insert respectively the first groove with the second groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122188577.8U CN215950019U (en) | 2021-09-10 | 2021-09-10 | Sequence oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122188577.8U CN215950019U (en) | 2021-09-10 | 2021-09-10 | Sequence oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215950019U true CN215950019U (en) | 2022-03-04 |
Family
ID=80429115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122188577.8U Active CN215950019U (en) | 2021-09-10 | 2021-09-10 | Sequence oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215950019U (en) |
-
2021
- 2021-09-10 CN CN202122188577.8U patent/CN215950019U/en active Active
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