CN210218298U - Single-acting oil cylinder with gas storage and backflow functions - Google Patents
Single-acting oil cylinder with gas storage and backflow functions Download PDFInfo
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- CN210218298U CN210218298U CN201921092262.XU CN201921092262U CN210218298U CN 210218298 U CN210218298 U CN 210218298U CN 201921092262 U CN201921092262 U CN 201921092262U CN 210218298 U CN210218298 U CN 210218298U
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Abstract
The utility model provides a single-acting oil cylinder for gas storage backflow, which comprises a cylinder cover assembly, a piston rod, a cylinder body assembly and a piston, wherein the cylinder cover assembly is fixedly connected with the cylinder body assembly; the piston rod is hollow, the piston is provided with a vent groove, and the vent groove is communicated with the rod cavity and the interior of the piston rod. When the piston rod of the single-acting oil cylinder with the stored gas and the returned flow extends out, the gas in the rod cavity can enter the interior of the piston rod through the vent groove on the piston, so that the gas pressure in the rod cavity is very small when the piston rod extends out completely; the hollow piston rod also provides a compressible space for the air in the rod chamber when the volume of the rod chamber becomes small near the maximum stroke position of the piston. The compressibility of the gas is fully utilized, and the pressure of the rod cavity is ensured to be in a controllable range.
Description
Technical Field
The utility model relates to a single-acting hydro-cylinder, in particular to single-acting piston cylinder of controllable gas storage backward flow.
Background
The single-action hydraulic oil cylinder only has one effective action area and can only generate thrust, the piston can only be reset by means of a spring, or by the dead weight of the piston or by external force, and the rod cavity of the piston of the oil cylinder can be compressed in the extending process, so that the pressure of the rod cavity is increased. There are two current solutions:
firstly, have the pole chamber dress oil return pipe 81 at the piston cylinder and discharge and intake air (as figure 1), this kind of structure can increase the welding of oil return pipe 81, also can corresponding access rubber tube on the oil return pipe 81, has increased corresponding cost, and the oil cylinder also can be polluted and corroded to the inspiratory air.
Secondly, a one-way valve 82 is added on the piston (as shown in figure 2). When the piston rod is extended, air in the rod chamber is discharged into the rodless chamber. A negative pressure is created when the piston rod is retracted and a small amount of air may be drawn in. This configuration also places high demands on the check valve 82, the entire cylinder will leak once the check valve 82 leaks oil, and the price of the check valve 82 and the manufacturing cost of the piston are high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a strong, simple structure's of manufacturability single-action hydro-cylinder of gas storage backward flow is provided.
In order to solve the technical problem, the utility model provides a single-acting oil cylinder for gas storage backflow, which comprises a cylinder cover assembly, a piston rod, a cylinder body assembly and a piston, wherein the cylinder cover assembly is fixedly connected with the cylinder body assembly;
the piston rod is hollow, the piston is provided with a vent groove, and the vent groove is communicated with the rod cavity and the interior of the piston rod.
As the optimization of the application, the piston rod of the single-acting oil cylinder with the gas storage and the backflow function is fixedly connected with the positioning shaft of the piston through the steel wire retainer ring.
Preferably, the vent groove of the single-acting oil cylinder for storing the air and returning the air extends from the end face of the piston to the end face of the positioning shaft of the piston.
When the piston rod of this single-acting hydro-cylinder of gas storage backward flow stretches out, the inside that has the inside that the air channel entering piston rod on the piston will be used to the gas that has the pole chamber compressed, and then when can guaranteeing that the piston rod stretches out completely, the atmospheric pressure that has the pole chamber is very little, even if the piston is close maximum stroke position department, when the volume that has the pole chamber becomes very little, hollow piston rod also can provide compressible space for the air that has the pole chamber. The compressibility of the gas is fully utilized, and the pressure of the rod cavity is ensured to be in a controllable range.
The beneficial technical effects of the single-acting oil cylinder with gas storage and backflow are as follows:
firstly, the single-acting oil cylinder with gas storage and backflow has the characteristic of strong manufacturability. The piston is simple to process, the cylinder body is not welded, and the cylinder barrel deformation caused by welding cannot be generated.
The single-acting oil cylinder with the gas storage and the backflow has the characteristics of simple installation, reliable performance and reliable structure. The traditional piston cylinder needs an oil return pipe or a check valve, the oil return pipe cannot be detached, oil leakage of the check valve can cause inner leakage of the oil cylinder, and the quality of the oil cylinder is not improved. The single-acting oil cylinder for gas storage and backflow has the advantages of simple structure, reliable performance and simple installation, and an oil return pipe and a one-way valve are omitted.
And thirdly, the single-acting oil cylinder with the gas storage and backflow functions has low cost. The piston rod of the single-acting oil cylinder with gas storage and backflow functions is made of pipes, so that the weight of the piston rod is greatly reduced, and the material cost is reduced.
Drawings
Fig. 1 is a schematic diagram of a single-acting hydraulic cylinder of the prior art.
Figure 2 is a schematic view of another single acting hydraulic ram of the prior art.
FIG. 3 is a cross-sectional view of the schematic structure of the present single-acting cylinder with gas storage and return.
FIG. 4 is a cross-sectional view of the piston of the present single acting cylinder with stored gas return.
FIG. 5 is a cross-sectional view of the piston rod of the present single acting cylinder with stored gas return.
Detailed Description
As shown in fig. 3 to 5
The single-acting oil cylinder with the gas storage and the backflow functions comprises a cylinder cover assembly 1, a gas release screw 6, a piston rod 3, a cylinder body assembly 2, a piston 4 and various sealing pieces.
The cylinder cover assembly 1 and the cylinder body assembly 2 are fixed, and one end of the piston rod 3 penetrates through the cylinder cover assembly 1 and extends into the cylinder body assembly 2.
The piston rod 3 is hollow inside, the effect of storing gas is achieved, an assembling groove 31 matched with the positioning shaft 41 of the piston 4 is formed in the side wall of an inner hole 32 of the piston rod 3 extending into one side inside the cylinder assembly 2, a first clamping groove 31a is formed in the groove wall of the assembling groove 31, a second clamping groove 41a is formed in the position, corresponding to the first clamping groove 31a of the piston 4, of the outer wall of the positioning shaft 41 of the piston 4, the assembling procedure between the piston rod 3 and the piston 4 is that the steel wire check ring 7 is placed in the second clamping groove 41a of the positioning shaft 41, after the piston rod 3 is matched with the positioning shaft 41 of the piston 4, the steel wire check ring 7 is located in the first clamping groove 31a of the piston rod 3 and the second clamping groove 41a of the positioning shaft 41, and fixation between the piston.
The piston 4 divides the interior of the cylinder cover assembly 1 and the interior of the cylinder body assembly 2 into a rod cavity 51 and a rodless cavity 52, the outer wall of the cylinder body assembly 2 is provided with a threaded hole, the threaded hole is communicated with the rod cavity 51 and the exterior of the cylinder body assembly 2, and the air release screw 6 is matched with the threaded hole of the cylinder body assembly 2.
The piston 4 is provided with a vent groove 42, the vent groove 42 extends from the edge of the end surface of the piston 4 close to the piston rod 3 to the end surface of the positioning shaft 41 of the piston 4 close to the piston rod 3, the vent groove 42 passes through the second clamping groove 41a of the positioning shaft 41, and the vent groove 42 is communicated with the rod cavity 51 and the interior of the piston rod 3.
When the piston rod 3 is extended, the compressed air in the rod chamber 51 will enter the interior of the piston rod 3 through the vent groove 42 on the piston 4, thereby ensuring that the air pressure in the rod chamber 51 is small when the piston rod 3 is fully extended. The compressibility of the gas is fully utilized to ensure that the pressure of the rod cavity 51 is in a controllable range.
The above description is only one embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and improvements can be made without departing from the principle of the present invention, and these should also be considered as belonging to the protection scope of the present invention.
Claims (3)
1. A single-acting oil cylinder with gas storage and backflow functions comprises a cylinder cover assembly, a piston rod, a cylinder body assembly and a piston, wherein the cylinder cover assembly is fixedly connected with the cylinder body assembly;
it is characterized in that:
the piston rod is hollow, the piston is provided with a vent groove, and the vent groove is communicated with the rod cavity and the interior of the piston rod.
2. The single-acting cylinder of air storage reflux of claim 1, characterized in that:
the piston rod and the positioning shaft of the piston are fixedly connected by a steel wire retainer ring.
3. The single-acting cylinder of air storage reflux of claim 1, characterized in that:
the vent groove extends from the end face of the piston to the end face of the positioning shaft of the piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921092262.XU CN210218298U (en) | 2019-07-12 | 2019-07-12 | Single-acting oil cylinder with gas storage and backflow functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921092262.XU CN210218298U (en) | 2019-07-12 | 2019-07-12 | Single-acting oil cylinder with gas storage and backflow functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210218298U true CN210218298U (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921092262.XU Active CN210218298U (en) | 2019-07-12 | 2019-07-12 | Single-acting oil cylinder with gas storage and backflow functions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206784A (en) * | 2019-07-12 | 2019-09-06 | 蚌埠液力机械有限公司 | The one-way cylinder of gas storage reflux |
-
2019
- 2019-07-12 CN CN201921092262.XU patent/CN210218298U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206784A (en) * | 2019-07-12 | 2019-09-06 | 蚌埠液力机械有限公司 | The one-way cylinder of gas storage reflux |
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