CN209818409U - Composite oil cylinder integrating balance cylinder function and hydraulic system adopting same - Google Patents
Composite oil cylinder integrating balance cylinder function and hydraulic system adopting same Download PDFInfo
- Publication number
- CN209818409U CN209818409U CN201790000295.XU CN201790000295U CN209818409U CN 209818409 U CN209818409 U CN 209818409U CN 201790000295 U CN201790000295 U CN 201790000295U CN 209818409 U CN209818409 U CN 209818409U
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- China
- Prior art keywords
- cylinder
- balance
- oil
- oil cylinder
- cylinder body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
Abstract
The utility model discloses a compound hydro-cylinder of integrated balance cylinder function, it includes balanced hydro-cylinder body and master cylinder body, the one end of master cylinder body is cup jointed in the balanced hydro-cylinder body, be provided with balanced hydro-cylinder piston in the balanced hydro-cylinder body, the piston rod tip of balanced hydro-cylinder piston with the rodless chamber intercommunication of master cylinder body, be provided with the master cylinder piston in the master cylinder body. The utility model also discloses a hydraulic system, it adopts above-mentioned compound hydro-cylinder. The utility model integrates the functions of the traditional hydraulic tail plate door closing oil cylinder and the balance oil cylinder, combines the functions of the two into a composite oil cylinder, cancels the independently configured balance oil cylinder, saves a large number of pipelines and joints for connecting the balance oil cylinder, simplifies the pipe distribution and leads the oil circuit of the whole set of hydraulic system to be more concise; and hydraulic circuit tie point reduces, can reduce hydraulic system's leakage probability, and the weight of whole set of system also lightens to some extent.
Description
Technical Field
The utility model belongs to the technical field of hydraulic cylinder, concretely relates to compound hydro-cylinder of integrated balance cylinder function and adopt hydraulic system of this hydro-cylinder.
Background
When the hydraulic lifting tail board for the vehicle is used, the tail board cargo platform is generally required to have an automatic downward turning function after being grounded, so that the front end of the cargo platform is grounded, and the cargo is conveniently loaded; when the tail board is lifted, firstly, a cargo platform is automatically turned upwards, so that the cargo platform is firstly turned upwards to be in a horizontal state, and then the cargo platform can be normally lifted. There are two ways to implement the above functions: one is a clamping structure, namely, a mechanical structure is matched with the motion of a lifting hydraulic cylinder to realize the automatic downward turning of the bearing platform; the most widely used method is to adopt a balance cylinder and realize the following by utilizing the pressure difference of a hydraulic cylinder: as shown in fig. 1, when the lift valve 4 and the drop valve 6 are both opened, the load-bearing platform is lowered, and after the load-bearing platform is landed, the pressure in the lift cylinder 2 is lowered, the hydraulic oil in the door-closing cylinder 1 enters the high-pressure end (right end) of the balance cylinder 3, and pushes the piston of the balance cylinder 3 to move to the low-pressure end (left end), so as to push out the hydraulic oil at the low-pressure end of the balance cylinder, and meanwhile, the door-closing cylinder 1 of the hydraulic tail plate is retracted, so that the purpose of automatically turning down the load-bearing platform. In the traditional hydraulic tail plate, an independent balance oil cylinder is adopted to realize the automatic turning-down function, the independent balance oil cylinder needs to be independently placed and fixed, and the weight is relatively heavy; and because the balance oil cylinder is independently placed, a special hydraulic hose is needed to connect the hydraulic oil circuit, and the arrangement of the hydraulic pipeline is more complicated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a compound hydro-cylinder of integrated balance cylinder function and adopt the hydraulic system of this hydro-cylinder, solve among the prior art hydraulic pressure oil circuit that the balance hydro-cylinder independently placed and lead to and connect complicated problem.
The utility model adopts the technical proposal that:
the utility model provides a compound hydro-cylinder of integrated balance cylinder function, its includes balance hydro-cylinder body and master cylinder body, the one end of master cylinder body cup joints in the balance hydro-cylinder body, be provided with the balance hydro-cylinder piston in the balance hydro-cylinder body, the piston rod tip of balance hydro-cylinder piston with the rodless chamber of master cylinder body communicates, be provided with the master hydro-cylinder piston in the master cylinder body.
The utility model discloses a characteristics still lie in:
a space enclosed by the top of the main oil cylinder piston, the small end of the piston rod of the balance oil cylinder piston and the inner side wall of the main oil cylinder body is a high-pressure oil chamber; and a space enclosed by the top of the balance oil cylinder piston and the inner wall of the balance oil cylinder body is a low-pressure oil cavity.
And a high-pressure cavity oil port communicated with the high-pressure oil cavity is formed in the outer side wall of the main oil cylinder body.
And a low-pressure cavity oil port communicated with the low-pressure oil cavity is formed in the outer side wall of the balance oil cylinder body.
And a sealing ring is arranged between the piston head of the main oil cylinder piston and the inner side wall of the main oil cylinder body, a sealing ring is also arranged between the piston rod of the balance oil cylinder piston and the inner side wall of the main oil cylinder body, and the two sealing rings are used for sealing the high-pressure oil cavity.
And a sealing ring for sealing the low-pressure oil cavity is arranged between the piston head of the balance oil cylinder piston and the inner side wall of the balance oil cylinder body.
The utility model discloses a another technical scheme does:
the hydraulic system comprises the composite oil cylinder with the integrated balance cylinder function, a lifting oil cylinder, a lifting valve, a switch gate valve and a descending valve, wherein a low-pressure cavity oil port of the composite oil cylinder is connected with the lifting oil cylinder in parallel and then sequentially connected with the lifting valve and the descending valve, and a high-pressure cavity oil port of the composite oil cylinder is further sequentially connected with the switch gate valve and the descending valve.
Compared with the prior art, the utility model integrates the functions of the traditional hydraulic tail plate door closing oil cylinder and the balance oil cylinder, combines the functions of the two into a composite oil cylinder, cancels the independently configured balance oil cylinder, saves a large number of pipelines and joints for connecting the balance oil cylinder, simplifies the pipe arrangement and leads the oil circuit of the whole set of hydraulic system to be more concise; and hydraulic circuit tie point reduces, can reduce hydraulic system's leakage probability, and the weight of whole set of system also lightens to some extent.
Drawings
FIG. 1 is a prior art hydraulic schematic;
fig. 2 is a schematic structural diagram of a composite oil cylinder integrating the function of a balance cylinder according to the present invention;
fig. 3 is a hydraulic system diagram of a compound oil cylinder with integrated balance cylinder function according to the present invention.
In the figure, 1' is a door closing oil cylinder, 1 is a composite oil cylinder, 2 is a lifting oil cylinder, 3 is a balance oil cylinder, 4 is a lifting valve, 5 is a switch gate valve, and 6 is a descending valve; 101. balance cylinder body 102, low pressure cavity oil port 103, balance cylinder piston 104, high pressure cavity oil port 105, main cylinder body 106, main cylinder piston 107, high pressure oil cavity 108 and low pressure oil cavity.
Detailed Description
The invention will be described in further detail with reference to the following detailed description and accompanying drawings:
the utility model provides a compound hydro-cylinder of integrated balance cylinder function, as shown in FIG. 2, it includes balance cylinder body 101 and master cylinder body 105, the one end of master cylinder body 105 is cup jointed in the balance cylinder body 101, be provided with balance cylinder piston 103 in the balance cylinder body 101, balance cylinder piston 103's piston rod tip with master cylinder body 105's rodless chamber intercommunication, be provided with master cylinder piston 106 in the master cylinder body 105.
The space enclosed by the top of the main cylinder piston 106, the small end of the piston rod of the balance cylinder piston 103 and the inner side wall of the main cylinder body 105 is a high-pressure oil chamber 107. A space enclosed by the top of the balance oil cylinder piston 103 and the inner wall of the balance oil cylinder body 101 is a low-pressure oil chamber 108; a high-pressure cavity oil port 104 communicated with the high-pressure oil cavity 107 is formed in the outer side wall of the main oil cylinder body 105; the outer side wall of the balance oil cylinder body 101 is provided with a low-pressure oil cavity 102 communicated with the low-pressure oil cavity 108.
A sealing ring is arranged between the piston head of the main cylinder piston 106 and the inner side wall of the main cylinder body 105, a sealing ring is also arranged between the piston rod of the balance cylinder piston 103 and the inner side wall of the main cylinder body 105, and the two sealing rings are used for sealing the high-pressure oil cavity 107.
And a sealing ring for sealing the low-pressure oil cavity 108 is arranged between the piston head of the balance oil cylinder piston 103 and the inner side wall of the balance oil cylinder body 101.
The utility model provides a hydraulic system, as shown in fig. 3, it includes compound hydro-cylinder 1, lift cylinder 2, drop valve 4, switch gate valve 5 and the drop valve 6 of foretell integrated balance cylinder function, compound hydro-cylinder 1's low pressure chamber hydraulic fluid port 102 with lift cylinder 2 connect in parallel after again in proper order with drop valve 4 and drop valve 6 connect, compound hydro-cylinder 1's high pressure chamber hydraulic fluid port 104 still is connected with switch gate valve 5 and drop valve 6 in proper order.
The utility model discloses a theory of operation does:
as shown in fig. 3, the utility model discloses a compound hydro-cylinder closes door hydro-cylinder 1 ' and balance cylinder 3 ' with traditional hydraulic tailboard's function and has integrated, merges the function of the two to a compound hydro-cylinder 1 in, this hydro-cylinder comprises front and back two parts, and the front portion is the hydraulic tailboard door-closing hydro-cylinder in the traditional meaning, and the tail jar at rear portion is the balance cylinder. Generally, when the oil path is connected, the high pressure chamber oil port 104 is connected to the closing cylinder hydraulic circuit of the power unit, and the low pressure chamber oil port 102 and the lifting cylinder 2 oil port are connected in parallel to the lifting cylinder 2 hydraulic circuit of the power unit.
When the hydraulic tail plate is in a descending state, the high-pressure cavity oil port 104 is closed, the low-pressure cavity oil port 102 is opened, and under the condition that the hydraulic tail plate is in a suspended state, the loop (connected with the low-pressure cavity oil port 102) of the lifting oil cylinder 2 still has higher pressure, and the pressure far higher than the low-pressure oil cavity 108 exists in the high-pressure oil cavity 107 at the right end of the balance oil cylinder piston 103 through the difference of the areas of the balance oil cylinder piston 103, so that the pressure can keep the main oil cylinder piston 106 in the current position and does not move; after the hydraulic tail plate is grounded, the pressure of a loop (connected with the oil port 102 of the low-pressure cavity) of the lifting oil cylinder 2 is rapidly reduced, and is not enough to provide enough pressure to keep the main oil cylinder piston 106, the piston rod of the main oil cylinder piston 106 is subjected to the reaction force (pressed) of the tail plate, so that the main oil cylinder piston 106 moves leftwards, the balance oil cylinder piston 103 is pushed leftwards through the hydraulic oil in the high-pressure oil cavity 107, the hydraulic oil in the low-pressure oil cavity 108 leaks back to the oil tank through the oil port 102 of the low-pressure cavity, and the purpose of retracting the piston rod of the main oil cylinder piston 106 (the bearing platform of.
When the hydraulic tail plate is lifted, the high-pressure cavity oil port 104 is closed, the low-pressure cavity oil port 102 is opened, the hydraulic oil pump sends hydraulic oil into a lifting oil cylinder 2 loop (connected with the low-pressure cavity oil port 102), the pressure pushes the balance oil cylinder piston 103 to move rightwards, the high-pressure oil cavity 107 on the right side of the balance cylinder generates pressure which is several times of that of the low-pressure oil cavity 108 on the left side, the main oil cylinder piston 106 of the closing cylinder moves rightwards by the pressure, the counter-acting force of the tail plate is overcome, and the purpose of automatic upturning of the hydraulic tail plate.
The utility model is different from the prior art in that:
in the traditional hydraulic tail plate, an independent balance oil cylinder 3 is adopted to realize the automatic downward turning function, the independent balance oil cylinder 3 needs to be independently placed and fixed, and the weight is relatively heavy; in addition, the balance oil cylinder 3 needs to be independently placed, a special hydraulic hose is needed for connection of a hydraulic oil path, and arrangement of the hydraulic pipeline is complicated.
According to the scheme, the balance oil cylinder 3 and the door closing oil cylinder 1' are integrated in function, so that the functions of the two cylinders are integrated in one hydraulic cylinder, the balance oil cylinder 3 does not need to be arranged independently, a large number of pipelines and joints for connecting the balance oil cylinder 3 are omitted, the pipe arrangement is simplified, and the oil circuit of the whole hydraulic system is simpler. In addition, the number of the hydraulic oil pipes is reduced, and the number of the connection points of the hydraulic oil way is reduced, so that the number of possible leakage points of the hydraulic oil way is reduced, and the failure rate of a hydraulic system is reduced; and the weight of the whole system can be reduced due to the absence of a separate balance oil cylinder.
Claims (7)
1. The utility model provides a compound hydro-cylinder of integrated balance cylinder function, its characterized in that, it includes balanced hydro-cylinder body and master cylinder body, the one end of master cylinder body cup joints in the balanced hydro-cylinder body, be provided with balanced hydro-cylinder piston in the balanced hydro-cylinder body, the piston rod tip of balanced hydro-cylinder piston with the rodless chamber of master cylinder body communicates, be provided with master cylinder piston in the master cylinder body.
2. The compound oil cylinder integrating the balance cylinder function as claimed in claim 1, wherein a space defined by the top of the main oil cylinder piston, the small end of the piston rod of the balance oil cylinder piston and the inner side wall of the main oil cylinder body is a high-pressure oil chamber; and a space enclosed by the top of the balance oil cylinder piston and the inner wall of the balance oil cylinder body is a low-pressure oil cavity.
3. The compound oil cylinder integrating the balance cylinder function as claimed in claim 2, wherein a high-pressure oil chamber communicated with the high-pressure oil chamber is provided on an outer side wall of the main oil cylinder body.
4. The compound oil cylinder integrating the balance cylinder function as claimed in claim 3, wherein a low-pressure oil chamber communicated with the low-pressure oil chamber is provided on an outer side wall of the balance cylinder body.
5. The composite oil cylinder integrating the balance cylinder function as claimed in claim 4, wherein a sealing ring is arranged between the piston head of the main oil cylinder piston and the inner side wall of the main oil cylinder body, a sealing ring is also arranged between the piston rod of the balance oil cylinder piston and the inner side wall of the main oil cylinder body, and the two sealing rings are used for sealing the high-pressure oil chamber.
6. The compound oil cylinder integrating the balance cylinder function as claimed in claim 4, wherein a sealing ring for sealing the low-pressure oil chamber is provided between the piston head of the balance cylinder piston and the inner side wall of the balance cylinder body.
7. A hydraulic system, characterized in that the hydraulic system comprises the compound oil cylinder integrating the function of the balance cylinder, a lifting oil cylinder, a lifting valve, a switch gate valve and a descending valve according to any one of claims 1 to 6, wherein a low pressure cavity oil port of the compound oil cylinder is connected with the lifting oil cylinder in parallel and then is sequentially connected with the lifting valve and the descending valve, and a high pressure cavity oil port of the compound oil cylinder is further sequentially connected with the switch gate valve and the descending valve.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/115901 WO2019113829A1 (en) | 2017-12-13 | 2017-12-13 | Compound oil cylinder integrated with function of balancing cylinder and hydraulic system using the oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209818409U true CN209818409U (en) | 2019-12-20 |
Family
ID=66818843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201790000295.XU Expired - Fee Related CN209818409U (en) | 2017-12-13 | 2017-12-13 | Composite oil cylinder integrating balance cylinder function and hydraulic system adopting same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN209818409U (en) |
| WO (1) | WO2019113829A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8707851B2 (en) * | 2009-11-20 | 2014-04-29 | Flexibility Engineering, Llc | Positioner apparatus and methods |
| GB2530796A (en) * | 2014-10-03 | 2016-04-06 | Sev Glocon Ltd | Actuator arrangement |
| CN105757026B (en) * | 2016-04-22 | 2017-06-09 | 青神格林维尔流体动力控制技术有限公司 | A kind of hydraulic system for controlling automobile tailboard to lift |
-
2017
- 2017-12-13 WO PCT/CN2017/115901 patent/WO2019113829A1/en active Application Filing
- 2017-12-13 CN CN201790000295.XU patent/CN209818409U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019113829A1 (en) | 2019-06-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191220 Termination date: 20211213 |