CN211202493U - Completely-locking hydraulic cylinder - Google Patents
Completely-locking hydraulic cylinder Download PDFInfo
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- CN211202493U CN211202493U CN201922451442.9U CN201922451442U CN211202493U CN 211202493 U CN211202493 U CN 211202493U CN 201922451442 U CN201922451442 U CN 201922451442U CN 211202493 U CN211202493 U CN 211202493U
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- piston rod
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Abstract
The utility model provides a complete shutting pneumatic cylinder, including the cylinder, be equipped with piston and piston rod in the cylinder, the inner fixed connection of piston rod is equipped with no pole chamber and has the pole chamber respectively in the both sides that lie in the piston in the cylinder, has seted up one-to-one and no pole chamber and has the communicating first hydraulic fluid port in pole chamber and second hydraulic fluid port on the cylinder, and first hydraulic fluid port and second hydraulic fluid port all are connected with balanced valve behind seamless steel pipe, the valve block in proper order. The balance valve, the valve block and the cylinder body are attached, the structure can save space, so that the hydraulic oil circuit is simple in layout and high in compressive strength; the balance valve and the valve block control the hydraulic oil path to be locked, the hydraulic oil path cannot be opened at all when the pressure is lower than a certain pressure, complete locking is achieved, and therefore the fact that the locking hydraulic cylinder is used as a rigid support and bears impact guarantees that the displacement is very small is guaranteed, and the stability function is met.
Description
Technical Field
The utility model relates to a hydraulic pressure technical field, concretely relates to complete shutting pneumatic cylinder for special type vehicle.
Background
The hydraulic cylinder is an actuating element in a hydraulic transmission system and is an energy conversion device for converting hydraulic energy into mechanical energy so as to realize reciprocating motion or rotary motion. The hydraulic system has the advantages of simple structure, reliable work and the like, and is widely applied to the hydraulic system.
The locking hydraulic cylinder has the additional locking function of the hydraulic cylinder, and can be designed to be locked at any position or at a certain specific position, so that the stroke of the hydraulic cylinder is locked at a certain position to bear impact and load or be used for supporting. In the special vehicle suspension system, the locking hydraulic cylinder is opened in the vehicle running process, the locking hydraulic cylinder can move relatively along with the elastic unit of the suspension, the damping effect is achieved, the vehicle body keeps the mobility and the comfort is guaranteed, and the frame is required to have strong system rigidity and stability during special operation, so that excellent special operation performance is achieved. The locking hydraulic cylinder is used as a rigid suspension during special operation, and the environment of the vehicle determines that the locking system also can meet the working capacities of dust prevention, corrosion prevention and the like. Therefore, the locking hydraulic cylinder used on the vehicle is subjected to impact during operation and generates little displacement or no displacement, so that the locking control and sealing requirements of the locking hydraulic cylinder are high. At present, a locking hydraulic cylinder is generally locked by connecting a valve with a hydraulic circuit, and when a valve is impacted, the locking performance is not strong and the locking is realized by needing larger pressure control; the guide sleeve is generally sealed by using a common sealing ring, the oil leakage phenomenon often exists between the guide sleeve and the piston rod, and particularly when a special vehicle is used for carrying out a cross-country test on a gravel road surface, the oil leakage phenomenon often occurs when the locking oil cylinder is used as an auxiliary damping vibration attenuation unit.
SUMMERY OF THE UTILITY MODEL
To the problem among the prior art, the utility model provides a complete shutting pneumatic cylinder, sealing scheme that can be better, and make the vehicle piston rod oil-tight when going at high speed to produce very little displacement and not influence the shutting function when bearing the impact.
The utility model provides a complete shutting pneumatic cylinder, includes the cylinder, be equipped with piston and piston rod in the cylinder, the inner fixed connection of piston rod is in on the piston, lie in the cylinder the both sides of piston are equipped with no pole chamber and have the pole chamber respectively, its characterized in that: and the cylinder barrel is provided with a first oil port and a second oil port which are communicated with the rodless cavity and the rod cavity in a one-to-one correspondence manner, and the first oil port and the second oil port are both connected with a balance valve.
The utility model discloses a theory of operation: after the balance valve is connected with the hydraulic oil circuit, hydraulic oil enters the cylinder barrel through the balance valve, specifically enters the rodless cavity from the rodless cavity oil port, and pushes the piston and the piston rod; oil in the rod cavity returns through the rod cavity oil port balance valve, and the piston rod extends out. When the piston rod reachd required stroke, disconnection hydraulic oil pressure, the utility model discloses carry out the shutting completely, the shutting pneumatic cylinder carries out the operation as the rigid support. After the operation is finished, hydraulic oil enters the rod cavity from the oil port of the rod cavity through the balance valve to push the piston and the piston rod to move, oil in the rodless cavity returns through the balance valve and the oil port of the rodless cavity, and the piston rod retracts.
Further comprises the following steps: the balance valve is fixedly connected to the top surface of the valve block, and the first oil port and the second oil port are communicated with the balance valve after sequentially passing through the seamless steel pipe and the valve block respectively.
Further comprises the following steps: the balance valve and the valve block are mutually attached, the passage openings of oil passages arranged in the balance valve and the valve block are mutually butted between the balance valve and the valve block, and the passage openings are provided with sealing rings.
Further comprises the following steps: and a guide belt, a sealing ring and a guide belt are sequentially arranged on the outer ring of the piston in the direction from the rod cavity to the rodless cavity at a position between the piston and the cylinder barrel, so that the rodless cavity and the rod cavity are sealed and separated.
Further comprises the following steps: an optical axis and a threaded shaft are integrally connected to the end face of the inner end of the piston rod from inside to outside in sequence, the optical axis and the threaded shaft are both arranged in the piston in a penetrating mode, the diameter of the threaded shaft is smaller than that of the optical axis, the threaded shaft is in threaded fit with the inner wall of the piston, and the optical axis is attached to the inner wall of the piston and sealed through a sealing ring; the threaded shaft outer end face is opposite to the piston rod is located on the other side face of the piston, the threaded shaft and the piston are convenient to assemble, and the optical axis and the threaded shaft are arranged to ensure the connection, fastening and sealing effects of the piston rod and the piston.
Further comprises the following steps: a guide sleeve is sleeved between the piston rod and the cylinder barrel in the middle of the piston rod, and the rod cavity is formed among the guide sleeve, the piston rod, the piston and the cylinder barrel.
Further comprises the following steps: the guide sleeve is characterized in that a guide belt, a gurley ring, an AQ seal, a guide belt and a dust ring are sequentially sleeved on the inner ring of the guide sleeve from the inner end to the outer end of the guide sleeve at a position between the piston rod and the guide sleeve.
Further comprises the following steps: the diameter of the inner end part of the outer ring of the guide sleeve is smaller than that of the middle part of the outer ring of the guide sleeve, the inner end part of the outer ring of the guide sleeve is attached to the cylinder barrel and is arranged in a sealing mode through a sealing ring and a sealing check ring, and the middle part of the guide sleeve is in threaded fit with the cylinder barrel.
The utility model has the advantages that: (1) the balance valve, the valve block and the cylinder body are attached, and the structure can save space, so that the hydraulic oil circuit is simple in layout and high in pressure resistance.
(2) The balance valve and the valve block control the hydraulic oil circuit to be locked, and the hydraulic oil circuit cannot be opened at all when the pressure is lower than a certain pressure, so that complete locking is realized; the control pressure is small, and energy is saved; within less than four hours during operation, the displacement is not more than 0.3mm, so that the locking hydraulic cylinder is ensured to have small displacement when being used as a rigid support and bearing impact, and the stability function is met.
(3) The guide sleeve and the piston rod are sealed by the AQ seal, the grating ring and the dustproof ring, so that the sealing performance is ensured, the oil leakage phenomenon of the piston rod is avoided, and the piston rod has waterproof and dustproof functions.
Drawings
FIG. 1 is a schematic sectional view of the present invention;
fig. 2 is a schematic view of the working principle of the present invention.
In the figure, 1, a cylinder cover, 2, a joint, 3, a piston, 4, a seamless steel pipe, 5, a valve block, 6, a balance valve, 7, a joint, 8, a cylinder barrel, 9, a guide sleeve, 10, a piston rod, 101, an optical axis, 102, a threaded shaft, 11, a dust ring, 12, a guide belt, 13, an AQ seal, 14, a gurley ring, 15, a sealing check ring and 16, a sealing ring; 20. and a hydraulic cylinder.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings. It should be noted that the terms of orientation such as left, middle, right, up and down in the examples of the present invention are only relative to each other or are referred to the normal use status of the product, and should not be considered as limiting.
A complete locking hydraulic cylinder comprises a cylinder barrel 8, a piston 3 and a piston rod 10 are arranged in the cylinder barrel 8, the inner end of the piston rod 10 is fixedly connected to the piston 3, a rodless cavity and a rod cavity are respectively arranged on two sides of the piston in the cylinder barrel 8, a first oil port and a second oil port which are communicated with the rodless cavity and the rod cavity in a one-to-one correspondence mode are formed in the cylinder barrel 8, and the first oil port and the second oil port are both connected with a balance valve 6.
The middle of the horizontally arranged cylinder barrel 8 is fixedly connected with a valve block 5, the top surface of the valve block 5 is fixedly connected with a balance valve 6, the first oil port and the second oil port respectively and sequentially pass through a seamless steel tube 4 and the valve block 5 and then are communicated with the balance valve 6, one end of the seamless steel tube 4 is welded with the valve block 5, the other end of the seamless steel tube 4 is welded with a connector 2, and the connector 2 is welded on the cylinder barrel 8 at positions corresponding to the first oil port and the second oil port; the balance valve 6 and the valve block 5 are mutually attached, the passage openings of oil passages arranged in the balance valve 6 and the valve block 5 are mutually butted between the balance valve 6 and the valve block 5, and the passage openings are provided with sealing rings.
In addition, a guide belt 12, a sealing ring 16 and a guide belt 12 are sequentially sleeved on the outer ring of the piston 3 in the direction from the rod cavity to the rodless cavity at the position between the piston 3 and the cylinder barrel 8; an optical axis 101 and a threaded shaft 102 are sequentially and integrally connected to the end face of the inner end of the piston rod 10 from inside to outside and coaxially arranged, the optical axis 101 and the threaded shaft 102 are both arranged in the piston 3 in a penetrating mode, the diameter of the threaded shaft 102 is smaller than that of the optical axis 101, the threaded shaft 102 is in threaded fit with the inner wall of the piston 3, and the optical axis 101 is attached to the inner wall of the piston 3 and sealed through a sealing ring 16; the end face of the outer end of the threaded shaft 102 is located on the other side face of the piston 3 relative to the piston rod 10, namely, the end face coincides with the side face of the piston 3;
a guide sleeve 9 is sleeved between the piston rod 10 and the cylinder barrel 8 in the middle of the piston rod 10, and a rod cavity is formed among the guide sleeve 9, the piston rod 10, the piston 3 and the cylinder barrel 8; a guide belt 12, a gray ring 14, an AQ seal 13, a guide belt 12 and a dust ring 11 are sequentially sleeved on the inner ring of the guide sleeve 9 from the inner end to the outer end of the guide sleeve 9 at a position between the piston rod 10 and the guide sleeve 9; the diameter of the end part of the inner end of the outer ring of the guide sleeve 9 is smaller than that of the middle part of the outer ring of the guide sleeve 9, the end part of the inner end of the outer ring of the guide sleeve 9 is attached to the cylinder barrel 8 and is arranged in a sealing mode through a sealing ring 16 and a sealing retainer ring 15, and the middle part of the guide sleeve 9 is in threaded fit with the cylinder barrel 8;
a cylinder cover 1 is welded at the other end, opposite to the guide sleeve 9, of the cylinder barrel 8, and the rodless cavity is formed among the cylinder cover 1, the piston 3 and the cylinder barrel 8; the inner wall of the cylinder cover 1 is provided with a groove, an oil path channel is arranged in the cylinder cover 1, one end of the oil path channel is communicated with the groove, and the outer end of the oil path channel is the first oil port.
The utility model discloses a theory of operation: referring to fig. 2, after the balance valve 6 is connected to the hydraulic oil path and the hydraulic cylinder 20, the hydraulic oil enters the cylinder barrel 8 through the balance valve 6, specifically enters the rodless cavity from the rodless cavity oil port, and pushes the piston 3 and the piston rod 10; oil in the rod cavity returns through the rod cavity oil port balance valve, and the piston rod 10 extends out. When the piston rod 10 arrived required stroke, disconnection hydraulic pressure power, the utility model discloses carry out the shutting completely, the operation is carried out as the rigid support to the shutting pneumatic cylinder. After the operation is finished, hydraulic oil enters the rod cavity through the balance valve 6 and the rod cavity oil port to push the piston 3 and the piston rod 10, the rodless cavity oil returns through the rodless cavity oil port and the balance valve 6, and the piston rod 10 retracts.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a complete shutting pneumatic cylinder, includes the cylinder, be equipped with piston and piston rod in the cylinder, the inner fixed connection of piston rod is in on the piston, lie in the cylinder the both sides of piston are equipped with no pole chamber and have the pole chamber respectively, its characterized in that: and the cylinder barrel is provided with a first oil port and a second oil port which are communicated with the rodless cavity and the rod cavity in a one-to-one correspondence manner, and the first oil port and the second oil port are both connected with a balance valve.
2. A full lock hydraulic cylinder according to claim 1, wherein: the balance valve is fixedly connected to the top surface of the valve block, and the first oil port and the second oil port are communicated with the balance valve after sequentially passing through the seamless steel pipe and the valve block respectively.
3.A full lock hydraulic cylinder according to claim 2, wherein: the balance valve and the valve block are mutually attached, the passage openings of oil passages arranged in the balance valve and the valve block are mutually butted between the balance valve and the valve block, and the passage openings are provided with sealing rings.
4. A full lock hydraulic cylinder according to claim 1, wherein: and a guide belt, a sealing ring and a guide belt are sequentially sleeved on the outer ring of the piston between the piston and the cylinder barrel from the direction from the rod cavity to the rodless cavity.
5. A full lock hydraulic cylinder according to claim 1, wherein: an optical axis and a threaded shaft are integrally connected to the end face of the inner end of the piston rod from inside to outside in sequence, the optical axis and the threaded shaft are both arranged in the piston in a penetrating mode, the diameter of the threaded shaft is smaller than that of the optical axis, the threaded shaft is in threaded fit with the inner wall of the piston, and the optical axis is attached to the inner wall of the piston and sealed through a sealing ring; the end face of the outer end of the threaded shaft is located on the other side face of the piston relative to the piston rod.
6. A full lock hydraulic cylinder according to claim 1, wherein: and a guide sleeve is arranged in the middle of the piston rod and between the piston rod and the cylinder barrel, and the rod cavity is formed among the guide sleeve, the piston rod, the piston and the cylinder barrel.
7. A full lock hydraulic cylinder according to claim 6, wherein: the guide sleeve is characterized in that a guide belt, a gurley ring, an AQ seal, a guide belt and a dust ring are sequentially sleeved on the inner ring of the guide sleeve from the inner end to the outer end of the guide sleeve at a position between the piston rod and the guide sleeve.
8. A full lock hydraulic cylinder according to claim 6 or 7, wherein: the diameter of the inner end part of the outer ring of the guide sleeve is smaller than that of the middle part of the outer ring of the guide sleeve, the inner end part of the outer ring of the guide sleeve is attached to the cylinder barrel and is arranged in a sealing mode through a sealing ring and a sealing check ring, and the middle part of the guide sleeve is in threaded fit with the cylinder barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922451442.9U CN211202493U (en) | 2019-12-31 | 2019-12-31 | Completely-locking hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922451442.9U CN211202493U (en) | 2019-12-31 | 2019-12-31 | Completely-locking hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN211202493U true CN211202493U (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922451442.9U Active CN211202493U (en) | 2019-12-31 | 2019-12-31 | Completely-locking hydraulic cylinder |
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| CN (1) | CN211202493U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114148937A (en) * | 2021-12-14 | 2022-03-08 | 新乡市新华液压机械有限公司 | Novel hydraulic cylinder |
-
2019
- 2019-12-31 CN CN201922451442.9U patent/CN211202493U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114148937A (en) * | 2021-12-14 | 2022-03-08 | 新乡市新华液压机械有限公司 | Novel hydraulic cylinder |
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