CN215927979U - Differential hydraulic oil cylinder - Google Patents
Differential hydraulic oil cylinder Download PDFInfo
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- CN215927979U CN215927979U CN202122053545.7U CN202122053545U CN215927979U CN 215927979 U CN215927979 U CN 215927979U CN 202122053545 U CN202122053545 U CN 202122053545U CN 215927979 U CN215927979 U CN 215927979U
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Abstract
The utility model provides a differential hydraulic oil cylinder which comprises a cylinder body and a piston rod, wherein a piston of the piston rod is connected in the cylinder body in a sliding manner; the piston divides the cylinder body into a rod cavity and a rodless cavity, a first oil port is formed in the inner wall of the rod cavity, a second oil port is formed in the inner wall of the rodless cavity, the first oil port is communicated with an oil inlet branch and an oil outlet branch which are connected in parallel, and the oil inlet branch and the oil outlet branch are both provided with check valves; the flow area of the oil inlet branch is larger than that of the oil outlet branch. Aiming at the defects of the prior art, the utility model can quickly return the piston rod, improve the stability of the process of the piston rod and reduce the fluctuation of the process work of the piston rod.
Description
Technical Field
The utility model relates to the field of hydraulic cylinder parts, in particular to a differential hydraulic cylinder.
Background
Hydraulic rams are an important component of hydraulic machines, and play the role of an actuator in the whole hydraulic machine, and convert hydraulic energy into mechanical energy in the whole process. When the hydraulic oil cylinder is used in some works, such as a lifter and a punching machine, hydraulic oil pressure with high return speed and stable progress is often needed, and the purpose of the high return speed is to shorten the return time and improve the working efficiency; the purpose of stable process is in the stamping or lifting work, the work stability can be ensured, and the fluctuation in the work is reduced; however, current hydraulic rams are difficult to do this.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a differential hydraulic oil cylinder, which can quickly return a piston rod, improve the stability of the process of the piston rod and reduce the fluctuation of the process work of the piston rod aiming at the defects of the prior art.
The embodiment of the utility model is realized by the following technical scheme: a differential hydraulic oil cylinder comprises a cylinder body and a piston rod, wherein a piston of the piston rod is connected in the cylinder body in a sliding manner; the piston divides the cylinder body into a rod cavity and a rodless cavity, a first oil port is formed in the inner wall of the rod cavity, a second oil port is formed in the inner wall of the rodless cavity, the first oil port is communicated with an oil inlet branch and an oil outlet branch which are connected in parallel, and the oil inlet branch and the oil outlet branch are both provided with check valves; the flow area of the oil inlet branch is larger than that of the oil outlet branch.
Further, the second oil port is connected with a valve.
Furthermore, a compression spring is arranged between the piston and the wall of the cylinder body, and the expansion direction of the compression spring is parallel to the stroke direction of the piston rod; the compression spring is located within the rod cavity.
Further, the compression spring is sleeved on the piston rod.
Further, a dynamic sealing mechanism exists between the piston and the inner wall of the cylinder body.
Furthermore, two limiting rings are arranged in the cylinder body, the two limiting rings are respectively close to the first oil port and the second oil port, and the two limiting rings are located between the first oil port and the second oil port.
The technical scheme of the embodiment of the utility model at least has the following advantages and beneficial effects:
according to the utility model, the oil inlet branch and the oil outlet branch on the rod cavity are different, so that quick oil inlet and slow oil discharge can be realized, and the purposes of quick return stroke and slow process of the piston rod are achieved; in the process, because the flow area of the oil outlet branch is small, the oil discharging amount is slow under the condition that the hydraulic pressure of the external oil cylinder is certain, namely the flow rate of the hydraulic oil is certain, so that the volume change of the hydraulic oil in the rod cavity is small, and the stability is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of the present invention;
icon: 1-a cylinder body; 2-a second oil port; 3-a first oil port; 4-oil outlet branch; 5-an oil inlet branch; 6-a one-way valve; 7-compression spring; 8-a piston rod; 9-a limit ring.
Detailed Description
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the products of the present invention are used, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the device or element which is referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figure 1, the differential hydraulic oil cylinder comprises a cylinder body 1 and a piston rod 8, wherein a piston of the piston rod 8 is connected in the cylinder body 1 in a sliding manner; the piston divides the cylinder body 1 into a rod cavity 11 and a rodless cavity 10; the inner wall of the rod cavity 11 is provided with a first oil port 3, the first oil port 3 is used for feeding and discharging oil to the rod cavity 11, the inner wall of the rodless cavity 10 is provided with a second oil port 2, the second oil port 2 is used for feeding and discharging oil to the rodless cavity 10, the first oil port 3 is communicated with an oil feeding branch 5 and an oil discharging branch 4 which are connected in parallel, and the oil feeding branch 5 and the oil discharging branch 4 are both provided with a one-way valve 6; the flow area of the oil inlet branch 5 is larger than that of the oil outlet branch 4.
In this embodiment, the differential hydraulic cylinder operates as follows:
the first oil port 3 and the second oil port 2 are externally connected with a hydraulic pump or a hydraulic oil station;
in the process of the piston rod 8, the piston rod 8 moves rightwards in fig. 1, and as the flow rate of the hydraulic oil is limited by a hydraulic pump or a hydraulic oil station, the flow area of the oil outlet branch 4 is small, the oil discharge is slow, the process of the piston rod 8 is slow, and therefore the process work is stable and the fluctuation is small.
In the process of the return stroke of the piston rod 8, the piston rod 8 moves leftwards in fig. 1, although the flow rate of the hydraulic oil is limited by a hydraulic pump or a hydraulic oil station, the flow area of the oil inlet branch 5 is large, the oil inlet amount is high, the return stroke speed of the piston rod 8 is high, and therefore the purpose of quick reset is achieved.
In this embodiment, the second oil port 2 is connected to a valve, and the opening degree of the valve controls the return speed of the piston rod 8, and the method is as follows:
the opening degree of the valve is different, the oil discharging flow of the hydraulic oil in the rodless cavity 10 is different, and therefore the return speed of the piston rod 8 is different.
In the present embodiment, further, in order to further optimize the technical effect of the present invention, a compression spring 7 is disposed between the piston and the wall of the cylinder 1, the compression spring 7 is in a compressed state or a state to be compressed in the present embodiment, and the expansion and contraction direction of the compression spring 7 is parallel to the stroke direction of the piston rod 8; the compression spring 7 is located in the rod chamber 11.
Specifically, the operation mode and the effect of the compression spring 7 are as follows:
during the process of the piston rod 8, the compression spring 7 is compressed and has an elastic force opposite to the piston motion, so that the speed of the process of the piston rod 8 can be further reduced, and the motion fluctuation of the piston rod 8 can be buffered.
In the process of the return stroke of the piston rod 8, the compression spring 7 has the same elastic force as the movement of the piston, and the return stroke speed of the piston rod 8 can be further increased.
In this embodiment, the compression spring 7 is sleeved on the piston rod 8, and the piston rod 8 limits the compression spring 7 to prevent the compression spring 7 from bending.
In the present embodiment, in order to avoid mutual convection between the hydraulic oil in the rod chamber 11 and the hydraulic oil in the rodless chamber 10, a dynamic sealing mechanism is present between the piston and the inner wall of the cylinder 1. It should be noted that the dynamic sealing mechanism is a conventional technology known to those skilled in the art, and will not be described in detail herein.
In this embodiment, in order to avoid the piston of the piston rod 8 from blocking the first oil port 3 or the second oil port 2, two limiting rings 9 are arranged in the cylinder body 1, the two limiting rings 9 are respectively close to the first oil port 3 and the second oil port 2, and the two limiting rings 9 are located between the first oil port 3 and the second oil port 2, so as to limit the movement of the piston rod 8 between the first oil port 3 and the second oil port 2.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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 (6)
1. A differential hydraulic oil cylinder comprises a cylinder body (1) and a piston rod (8), wherein a piston of the piston rod (8) is connected in the cylinder body (1) in a sliding manner; the method is characterized in that: the cylinder body (1) is divided into a rod cavity (11) and a rodless cavity (10) by the piston, a first oil port (3) is formed in the inner wall of the rod cavity (11), a second oil port (2) is formed in the inner wall of the rodless cavity (10), the first oil port (3) is communicated with an oil inlet branch (5) and an oil outlet branch (4) which are connected in parallel, and the oil inlet branch (5) and the oil outlet branch (4) are both provided with a one-way valve (6); the flow area of the oil inlet branch (5) is larger than that of the oil outlet branch (4).
2. The differential hydraulic ram of claim 1, wherein: the second oil port (2) is connected with a valve.
3. The differential hydraulic ram of claim 1, wherein: a compression spring (7) is arranged between the piston and the wall of the cylinder body (1), and the expansion direction of the compression spring (7) is parallel to the stroke direction of the piston rod (8); the compression spring (7) is positioned in the rod cavity (11).
4. A differential hydraulic ram according to claim 3 wherein: the compression spring (7) is sleeved on the piston rod (8).
5. The differential hydraulic ram of claim 1, wherein: and a dynamic sealing mechanism is arranged between the piston and the inner wall of the cylinder body (1).
6. The differential hydraulic ram of claim 1, wherein: the oil cylinder is characterized in that two limiting rings (9) are arranged in the cylinder body (1), the two limiting rings (9) are respectively close to the first oil port (3) and the second oil port (2), and the two limiting rings (9) are located between the first oil port (3) and the second oil port (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122053545.7U CN215927979U (en) | 2021-08-27 | 2021-08-27 | Differential hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122053545.7U CN215927979U (en) | 2021-08-27 | 2021-08-27 | Differential hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215927979U true CN215927979U (en) | 2022-03-01 |
Family
ID=80421243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122053545.7U Active CN215927979U (en) | 2021-08-27 | 2021-08-27 | Differential hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215927979U (en) |
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2021
- 2021-08-27 CN CN202122053545.7U patent/CN215927979U/en active Active
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