CN211474578U - Oil cylinder with terminal unloading valve on piston - Google Patents
Oil cylinder with terminal unloading valve on piston Download PDFInfo
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- CN211474578U CN211474578U CN201922294277.0U CN201922294277U CN211474578U CN 211474578 U CN211474578 U CN 211474578U CN 201922294277 U CN201922294277 U CN 201922294277U CN 211474578 U CN211474578 U CN 211474578U
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Abstract
The utility model discloses a hydro-cylinder of taking terminal off-load valve on piston, it includes the cylinder, lid behind the ears, the protecgulum, a piston, the piston rod, the Y-shaped pole that connects, be equipped with terminal off-load valve in the piston, terminal off-load valve includes the gland with piston connection, right guide arm with piston sliding connection, left guide arm with the gland connection, right check valve with piston connection, left check valve with gland connection, the piston is stretched out to the right-hand member of right guide arm, the left end is deepened right check valve and is contacted rather than interior steel ball, it is equipped with the gasket to control between the check valve, the gland is stretched out to the left end of left guide arm, the right-hand member is deepened. The utility model discloses installation space is little, compact structure, and simple structure is practical, energy-concerving and environment-protective, satisfy the user's demand.
Description
The technical field is as follows:
the utility model relates to a hydro-cylinder especially relates to a hydro-cylinder of taking terminal off-load valve on piston.
Background art:
at present, when two oil cylinders are used in series to form a synchronous oil cylinder, the existing oil cylinder with terminal unloading can provide the functions of terminal unloading and intermediate cavity oil supplement. However, because the oil cylinder cannot maintain pressure in the operation process, the internal leakage of the oil cylinder is large, the output flow of the pump needs to be increased, and the energy utilization rate is low. When the oil cylinder is in an inoperative state and equipment (such as a semi-trailer carriage) is in a running and bumping state, a piston rod of the oil cylinder can automatically stretch out a little in an uncontrolled manner, so that the actual use requirement of a user is influenced. In order to meet the actual use requirements of users, a hydraulic cylinder with a novel structure is required to meet the requirements.
The utility model has the following contents:
the utility model aims to overcome the shortcomings of the prior art and provide an oil cylinder with a terminal unloading valve on a piston.
The utility model provides a technical scheme as follows: an oil cylinder with a terminal unloading valve on a piston comprises a cylinder barrel, wherein one end of the cylinder barrel is connected with a double-lug rear cover, the other end of the cylinder barrel is connected with a front cover, the piston is arranged in the cylinder barrel and is connected with one end of a piston rod, and the other end of the piston rod is connected with a Y-shaped connecting rod; the piston is characterized in that a terminal unloading valve is arranged in the piston, the terminal unloading valve comprises a gland, a right guide rod, a left guide rod, a right check valve and a left check valve, the right guide rod is connected with the piston in a sliding mode, the right end of the right guide rod extends out of the piston, the left end of the right guide rod extends into the right check valve to be in contact with steel balls in the right check valve, the right check valve is in threaded connection with the piston, a gasket is arranged between the left check valve and the right check valve, the left check valve is in threaded connection with the gland, and the gland is in threaded connection with the; the left guide rod is connected with the gland in a sliding mode, the left end of the left guide rod extends out of the gland, and the right end of the left guide rod extends into the left check valve to be in contact with the steel ball in the left check valve.
Furthermore, a first O-shaped ring, an O-shaped ring retainer ring and a second O-shaped ring are arranged between the front cover and the cylinder barrel; a dustproof ring, a sealing ring for a first shaft, a sealing ring for a second shaft and a guide ring are arranged between the front cover and the piston rod; a sealing ring for holes and a supporting ring are arranged between the piston and the cylinder barrel, and a third O-shaped ring is arranged between the piston and the piston rod; and a fourth O-shaped ring is arranged between the piston and the gland, a fifth O-shaped ring is arranged between the gland and the left one-way valve for sealing, and a sixth O-shaped ring is arranged between the piston and the right one-way valve.
The utility model has the advantages that: the utility model discloses a design a take terminal off-load valve on the piston, both guaranteed the hydro-cylinder and accomplished the hydro-cylinder at the function of terminal off-load again at the characteristics of operation in-process pressurize, realized simultaneously when two hydro-cylinders are established ties and are used into synchronous hydro-cylinder, can play the effect that the middle chamber mended oil. The energy-saving oil cylinder can meet the requirement of a user on energy saving in the operation process of the oil cylinder, and can also meet the requirement that the oil cylinder is in an out-of-operation state, and when equipment (such as a semi-trailer carriage) is in an operation bumping state, a piston rod of the oil cylinder can keep the original position stable. The utility model has the advantages of small installation space, compact structure, simple and practical structure, energy conservation, environmental protection, capability of meeting the user demand,
Description of the drawings:
fig. 1 is a schematic structural view of the present invention in a natural state;
FIG. 2 is an enlarged partial view of the terminal unloader valve of FIG. 1;
FIG. 3 is a schematic diagram of the operating state of the cylinder when the piston of the present invention is in the middle position and the rodless cavity has high pressure oil;
FIG. 4 is an enlarged fragmentary view of the terminal unloader valve of FIG. 3;
FIG. 5 is a schematic diagram of the action state of the cylinder when the piston of the present invention contacts the front cover terminal and the rodless cavity has high pressure oil;
FIG. 6 is an enlarged partial view of the terminal unloader valve of FIG. 5;
FIG. 7 is a schematic view showing the operating state of the cylinder when the piston of the present invention is in the middle position and the rod chamber has high pressure oil;
FIG. 8 is an enlarged partial view of the terminal unloader valve of FIG. 7;
FIG. 9 is a schematic diagram of the operating state of the cylinder when the piston of the present invention contacts the rear cover terminal and there is high pressure oil in the rod cavity;
FIG. 10 is an enlarged fragmentary view of the terminal unloader valve of FIG. 9;
fig. 11 is a schematic diagram illustrating the principle of the present invention when synchronizing the cylinders.
The specific implementation mode is as follows: the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings:
as shown in figure 1, the oil cylinder with the terminal unloading valve on the piston comprises a cylinder barrel 4, one end of the cylinder barrel 4 is connected with a double-lug rear cover 6 in a welding mode, the other end of the cylinder barrel 4 is connected with a front cover 2 through threads, a piston 5 is arranged in the cylinder barrel 4, the piston 5 is connected with one end of a piston rod 3 through threads, and the other end of the piston rod 3 is connected with a fork-shaped connecting rod 1 through threads. The front cover 2 and the cylinder 4 are sealed by a first O-shaped ring 9 and an O-shaped ring retainer ring 10, and are waterproof and dustproof by a second O-shaped ring 13. A dustproof ring 15 is arranged between the front cover 2 and the piston rod 3 and used for preventing dust and impurities from entering the cylinder body, a first shaft sealing ring 12 and a second shaft sealing ring 14 are arranged for sealing, and a guide ring 11 is arranged and used for playing a role of guiding when the piston rod 3 moves. A sealing ring for holes and a supporting ring 7 are arranged between the piston 5 and the cylinder barrel 4, and the piston 5 and the piston rod 3 are sealed by a third O-shaped ring 8.
As shown in FIG. 2, a terminal unloading valve 16 is arranged in the piston 5, the terminal unloading valve 16 comprises a gland 16-9, a right guide rod 16-1, a left guide rod 16-6, a right one-way valve 16-3 and a left one-way valve 16-5, and the right guide rod 16-1 and the piston 5 can slide left and right through tolerance fit. The right end of the right guide rod 16-1 extends out of the piston 5, the left end of the right guide rod 16-1 extends into the right check valve 16-3 to be in contact with steel balls in the right check valve 16-3, the right check valve 16-3 is in threaded connection with the piston 5, in order to prevent an oil path from being blocked, the left check valve 16-5 and the right check valve 16-3 are separated by a gasket 16-4, the left check valve 16-5 is in threaded connection with the gland 16-9, and the gland 16-9 is in threaded connection with the piston 5. The left guide rod 16-6 and the gland 16-9 are matched through tolerance and can slide left and right, the left end of the left guide rod 16-6 extends out of the gland 16-9, the right end of the left guide rod 16-6 extends into the left check valve 16-5 to be in contact with a steel ball in the left check valve 16-5, the piston 5 and the gland 16-9 are sealed through a fourth O-ring 16-8, the gland 16-9 and the left check valve 16-5 are sealed through a fifth O-ring 16-7, and the piston 5 and the right check valve 16-3 are sealed through a sixth O-ring 16-2.
The utility model discloses the working process is as follows:
as shown in figures 3 and 4, the piston 5 is in the middle position, the rodless cavity of the oil cylinder is filled with high-pressure oil, because the rodless cavity is filled with the high-pressure oil, the steel ball in the left one-way valve 16-5 is opened by the high-pressure oil, and the steel ball in the right one-way valve 16-3 keeps a sealed state, so that the terminal unloading valve is in the sealed state at the moment, and the rodless cavity and the rod cavity can be sealed under the condition that the rodless cavity is filled with the high-pressure oil when the piston of the oil cylinder is in the middle position.
And secondly, as shown in figures 5 and 6, a piston 5 is in terminal contact with a front cover 2, high-pressure oil is arranged in a rodless cavity of the oil cylinder, because the rodless cavity is provided with the high-pressure oil, a steel ball in a left one-way valve 16-5 is opened by the high-pressure oil, the front cover 2 is completely contacted with a right guide rod 16-1 at the moment, the right guide rod 16-1 moves leftwards, so that the steel ball of a right one-way valve 16-3 is opened, the unloading valve is in an unloading state at the moment, a cavity is formed between the rodless cavity and the rod cavity, and hydraulic oil flows to the rod cavity from the rodless cavity, so that when the synchronous oil cylinder is used as a synchronous oil cylinder.
Thirdly, as shown in figures 7 and 8, the piston 5 is in the middle position, the rod cavity of the oil cylinder is provided with high-pressure oil, because the rod cavity is provided with the high-pressure oil, the steel ball in the right one-way valve 16-3 is opened by the high-pressure oil, and the steel ball in the left one-way valve 16-5 is kept in a sealing state, so that the terminal unloading valve is in the sealing state at the moment, and the situation that the rodless cavity and the rod cavity are closed under the condition that the rod cavity is provided with the high-pressure oil when the piston of the oil cylinder is in the middle position can be ensured.
Fourthly, as shown in figures 9 and 10, the piston 5 is in terminal contact with the rear cover 6, the rod cavity of the oil cylinder is filled with high-pressure oil, because the rod cavity is filled with high-pressure oil, the steel ball in the right one-way valve 16-3 is opened by the high-pressure oil, at the moment, the rear cover 6 is in complete contact with the left guide rod 16-6, the left guide rod 16-6 moves rightwards, so that the steel ball of the left one-way valve 16-5 is opened, at the moment, the unloading valve is in an unloading state, a cavity is formed between the rod cavity and the rodless cavity, and hydraulic oil flows from the rod cavity to the rodless cavity, so that when the oil cylinder is used as a synchronous oil cylinder, oil can.
The fifth step: as shown in fig. 3 and 4, the piston 5 is in the middle position, the rodless cavity of the oil cylinder is provided with high-pressure oil, and the process of the first step is repeated, so that the oil cylinder completes the closed-loop motion process.
As shown in fig. 11, the structure that the end unloading valve is added to the cylinder piston is mainly used for a synchronous cylinder, and the synchronous cylinder is generally used by connecting a first cylinder 17 and a second cylinder 18 of two cylinders in series; an oil port A117-1 of the first oil cylinder 17 and an oil port B218-2 of the second oil cylinder 18 are respectively connected with the hydraulic station, and an oil port A217-2 of the first oil cylinder 17 is connected with an oil port B118-1 of the second oil cylinder 18.
When high-pressure oil is introduced into the rodless cavity of the first oil cylinder 17, the piston rod of the first oil cylinder 17 extends out, the oil in the rodless cavity of the first oil cylinder 17 is sent to the rodless cavity of the second oil cylinder 18, so that the piston rod of the second oil cylinder 18 is pushed out, and the piston rod of the first oil cylinder 17 and the piston rod of the second oil cylinder 18 are synchronously pushed out, so that the mechanical structure can be smoothly pushed out by a user. When the rod cavity of the second oil cylinder 18 is communicated with high-pressure oil, the piston rod of the second oil cylinder 18 retracts, oil in the rodless cavity of the second oil cylinder 18 is sent to the rod cavity of the first oil cylinder 17, so that the piston rod of the first oil cylinder 17 is pushed to retract, and the piston rod of the second oil cylinder 18 and the piston rod of the first oil cylinder 17 retract synchronously, so that the mechanical structure is pulled back smoothly by a user. The terminal unloading valve can be used for oil supplementing and air exhausting of a rod cavity of the first oil cylinder 17 and a rodless cavity of the second oil cylinder 18 at the terminal, so that continuous and stable operation of the oil cylinders is met.
It should be understood that parts of the specification not set forth in detail are well within the prior art. The above description of the preferred embodiments is in great detail, but should not be construed as limiting the scope of the invention.
Claims (2)
1. An oil cylinder with a terminal unloading valve on a piston comprises a cylinder barrel (4), wherein one end of the cylinder barrel (4) is connected with a double-lug rear cover (6), the other end of the cylinder barrel (4) is connected with a front cover (2), a piston (5) is arranged in the cylinder barrel (4), the piston (5) is connected with one end of a piston rod (3), and the other end of the piston rod (3) is connected with a fork-shaped connecting rod (1); it is characterized in that a terminal unloading valve (16) is arranged in the piston (5), the terminal unloading valve (16) comprises a gland (16-9), a right guide rod (16-1), a left guide rod (16-6), a right one-way valve (16-3) and a left one-way valve (16-5), the right guide rod (16-1) is connected with the piston (5) in a sliding way, the right end of the right guide rod (16-1) extends out of the piston (5), the left end of the right guide rod (16-1) extends into the right one-way valve (16-3) to be contacted with a steel ball in the right one-way valve (16-3), the right one-way valve (16-3) is connected with the piston (5) in a threaded way, a gasket (16-4) is arranged between the left one-way valve (16-5) and the right one-way valve (16-3), the left one-way valve (16-5, the gland (16-9) is in threaded connection with the piston (5); the left guide rod (16-6) is connected with the gland (16-9) in a sliding mode, the left end of the left guide rod (16-6) extends out of the gland (16-9), and the right end of the left guide rod (16-6) extends into the left check valve (16-5) to be in contact with the steel ball in the left check valve (16-5).
2. The oil cylinder with the terminal unloading valve on the piston as claimed in claim 1, characterized in that a first O-shaped ring (9), an O-shaped ring retainer ring (10) and a second O-shaped ring (13) are arranged between the front cover (2) and the cylinder barrel (4); a dustproof ring (15), a first shaft sealing ring (12), a second shaft sealing ring (14) and a guide ring (11) are arranged between the front cover (2) and the piston rod (3); a sealing ring for holes and a supporting ring (7) are arranged between the piston (5) and the cylinder barrel (4), and a third O-shaped ring (8) is arranged between the piston (5) and the piston rod (3); a fourth O-shaped ring (16-8) is arranged between the piston (5) and the gland (16-9), a fifth O-shaped ring seal is arranged between the gland (16-9) and the left one-way valve (16-5), and a sixth O-shaped ring (16-2) is arranged between the piston (5) and the right one-way valve (16-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922294277.0U CN211474578U (en) | 2019-12-19 | 2019-12-19 | Oil cylinder with terminal unloading valve on piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922294277.0U CN211474578U (en) | 2019-12-19 | 2019-12-19 | Oil cylinder with terminal unloading valve on piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211474578U true CN211474578U (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922294277.0U Active CN211474578U (en) | 2019-12-19 | 2019-12-19 | Oil cylinder with terminal unloading valve on piston |
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| Country | Link |
|---|---|
| CN (1) | CN211474578U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112112860A (en) * | 2020-07-28 | 2020-12-22 | 泸州金辉液压件有限责任公司 | Self-unloading pile-pressing oil cylinder |
-
2019
- 2019-12-19 CN CN201922294277.0U patent/CN211474578U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112112860A (en) * | 2020-07-28 | 2020-12-22 | 泸州金辉液压件有限责任公司 | Self-unloading pile-pressing oil cylinder |
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