CN213865257U - Freely-controlled fork opening and closing mechanism - Google Patents
Freely-controlled fork opening and closing mechanism Download PDFInfo
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- CN213865257U CN213865257U CN202022494597.3U CN202022494597U CN213865257U CN 213865257 U CN213865257 U CN 213865257U CN 202022494597 U CN202022494597 U CN 202022494597U CN 213865257 U CN213865257 U CN 213865257U
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Abstract
The utility model relates to a free control fork opening and closing mechanism, which comprises a first oil cylinder, a first control valve, a second oil cylinder and a second control valve, wherein a rod cavity of the first oil cylinder is connected to an oil port of the first control valve through a first oil pipe, a rodless cavity of the first oil cylinder is connected to another oil port of the first control valve through a second oil pipe, a rod cavity of the second oil cylinder is communicated with the rod cavity of the first oil cylinder, the free control fork opening and closing mechanism further comprises a two-position three-way electromagnetic valve, the two-position three-way electromagnetic valve is provided with an A port, a P port and a T port, the A port of the two-position three-way electromagnetic valve is connected to an oil port of the second control valve through a third oil pipe, the P port of the two-position three-way electromagnetic valve is communicated with the second oil pipe, the T port of the two-position three-way electromagnetic valve is communicated with the first oil pipe, the rodless cavity of the second oil cylinder is connected to another oil port of the second control valve through a fourth oil pipe, the free control fork opening and closing mechanism further comprises an electrically controlled two-way stop valve, one oil port of the electrically controlled two-way stop valve is communicated with the second oil pipe, and the other oil port of the electric control two-way stop valve is communicated with a fourth oil pipe. The utility model discloses can reduce fault rate, control mode more diversified.
Description
Technical Field
The utility model relates to a free control fork mechanism that opens and shuts.
Background
Fork truck's fork can set to adjustable structure often, and left fork passes through first hydro-cylinder and first control valve control, and right fork passes through second hydro-cylinder and second control valve control to realize opening and shutting of fork, traditional fork control structure moves or moves to the right simultaneously in order to realize left fork and right fork simultaneously and moves to the left, need install two hydraulic pressure locks additional, and the pipeline joint increases, and the fault rate has also increased.
Accordingly, the present inventors have made extensive studies to solve the above problems and have made the present invention.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can reduce fault rate, the more diversified mechanism that opens and shuts of free control fork.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the free control fork opening and closing mechanism comprises a first oil cylinder, a first control valve, a second oil cylinder and a second control valve, wherein a rod cavity of the first oil cylinder is connected to an oil port of the first control valve through a first oil pipe, a rodless cavity of the first oil cylinder is connected to the other oil port of the first control valve through a second oil pipe, a rod cavity of the second oil cylinder is communicated with the rod cavity of the first oil cylinder, the free control fork opening and closing mechanism further comprises a two-position three-way electromagnetic valve, the two-position three-way electromagnetic valve is provided with an A port, a P port and a T port, the A port of the two-position three-way electromagnetic valve is connected to one oil port of the second control valve through a third oil pipe, the P port of the two-position three-way electromagnetic valve is communicated with the second oil pipe, the T port of the two-position three-way electromagnetic valve is communicated with the first oil pipe, the rodless cavity of the second oil cylinder is connected to the other oil port of the second control valve through a fourth oil pipe, the free control fork opening and closing mechanism further comprises an electric control two-way stop valve, one oil port of the electric control two-way stop valve is communicated with the second oil pipe, and the other oil port of the electric control two-way stop valve is communicated with a fourth oil pipe.
In the above scheme, the first control valve is a first three-position four-way reversing valve, and the second control valve is a second three-position four-way reversing valve.
In the scheme, the first three-position four-way reversing valve is provided with an opening a, an opening b, an opening c and an opening d, the opening c is connected with the oil supply mechanism, the opening d is connected with the oil return tank, the opening a is connected with the first oil pipe, the opening b is connected with the second oil pipe, a first control piece which enables the opening b and the opening c to be communicated and enables the opening a and the opening d to be communicated is arranged on the first three-position four-way reversing valve, and a second control piece which enables the opening a and the opening c to be communicated and enables the opening b and the opening d to be communicated is further arranged on the first three-position four-way reversing valve.
In the scheme, the second three-position four-way reversing valve is provided with an opening a, an opening b, an opening c and an opening d, the opening c is connected with the oil supply mechanism, the opening d is connected with the oil return tank, the opening a is connected with the third oil pipe, the opening b is connected with the fourth oil pipe, a first control piece which enables the opening b and the opening c to be communicated and enables the opening a and the opening d to be communicated is arranged on the second three-position four-way reversing valve, and a second control piece which enables the opening a and the opening c to be communicated and enables the opening b and the opening d to be communicated is further arranged on the second three-position four-way reversing valve.
After the technical scheme of the utility model is adopted, when the first oil pipe takes oil, the second oil pipe returns oil, the retraction of the piston rod of the first oil cylinder is realized, and the second oil cylinder does not act; when oil enters the second oil pipe, the first oil pipe returns oil, the piston rod of the first oil cylinder extends out, and the second oil cylinder does not act; when oil enters the first oil pipe, the second oil pipe returns oil, the piston rod of the first oil cylinder retracts, the electric control two-way stop valve is electrified (two oil ports of the electric control two-way stop valve are communicated), oil of the fourth oil pipe returns oil from the second oil pipe after passing through the electric control two-way stop valve, and the piston rod of the second oil cylinder retracts, so that the two forks of the forklift are separated; when oil enters the second oil pipe, the first oil pipe returns oil to realize the extension of the piston rod of the first oil cylinder, the electric control two-way stop valve is electrified (two oil ports of the electric control two-way stop valve are communicated), the oil of the second oil pipe enters the second oil cylinder after passing through the electric control two-way stop valve, the piston rod of the second oil cylinder extends out to realize the folding of two forks; when oil enters the third oil pipe, the port A and the port T of the two-position three-way electromagnetic valve are communicated, oil returns from the fourth oil pipe, the piston rod of the second oil cylinder retracts, and the first oil cylinder does not act; when oil enters the fourth oil pipe, the port A and the port T of the two-position three-way electromagnetic valve are communicated, and when oil returns from the third oil pipe, the piston rod of the second oil cylinder extends out, and the first oil cylinder does not act; when oil enters the third oil pipe, the port A and the port P of the two-position three-way electromagnetic valve are communicated, the oil enters the first oil cylinder through the second oil pipe and then enters the rod cavity of the second oil cylinder from the rod cavity of the first oil cylinder, the fourth oil pipe returns oil, and the piston rod of the second oil cylinder retracts to enable the two forks to move towards the same direction; when oil enters the fourth oil pipe, the port A and the port P of the two-position three-way electromagnetic valve are communicated, the third oil pipe returns oil, the oil drives the piston rod of the second oil cylinder to extend out, the piston rod of the first oil cylinder retracts to realize synchronous movement of the two forks in the other direction, and the piston rod of the second oil cylinder retracts to enable the two forks to move towards the same direction. The utility model discloses an automatically controlled two-way stop valve replaces the design of cooperation oil circuit, replaces two traditional hydrovalves, reduces the pipeline structure, reduces the fault rate of pipeline, can realize the various actions of fork simultaneously.
Drawings
Fig. 1 is a control schematic diagram of the present invention (wherein the first control valve and the second control valve are not shown).
Fig. 2 is a schematic structural diagram of the first control valve and the second control valve of the present invention.
In the figure:
Two-position three-way solenoid valve 70 of second control valve 60
Detailed Description
In order to further explain the technical solution of the present invention, the following embodiments are described in detail.
Referring to fig. 1 to 2, the free control fork opening and closing mechanism includes a first oil cylinder 10, a first control valve 50, a second oil cylinder 20 and a second control valve 60, wherein the first oil cylinder 10 and the second oil cylinder 20 are both mounted on a fork mounting frame, the first oil cylinder 10 is used for driving a left fork to move, and the second oil cylinder 20 is used for driving a right fork to move. The rod cavity of the first oil cylinder 10 is connected to one oil port of the first control valve 50 through a first oil pipe 31, the rodless cavity of the first oil cylinder 10 is connected to the other oil port of the first control valve 50 through a second oil pipe 32, and the rod cavity of the second oil cylinder 20 is communicated with the rod cavity of the first oil cylinder 10, specifically through oil pipe connection. The utility model discloses still include two three way solenoid valve 70, two three way solenoid valve 70 has the A mouth, P mouth and T mouth, through control button, can realize switching on or the A mouth switches on with the T mouth of A mouth and P mouth, the A mouth of two three way solenoid valve 70 is connected to an hydraulic fluid port of second control valve 60 through third oil pipe 33, the P mouth and the second oil pipe 32 intercommunication of two three way solenoid valve 70, the T mouth and the first oil pipe 31 intercommunication of two three way solenoid valve 70, the rodless chamber of second hydro-cylinder 20 is connected to another hydraulic fluid port of second control valve 60 through fourth oil pipe 34, still include automatically controlled two-way stop valve 40, an hydraulic fluid port and the second oil pipe 32 intercommunication of automatically controlled two-way stop valve 40, another hydraulic fluid port and the fourth oil pipe 34 intercommunication of automatically controlled two-way stop valve 40. When the electrically controlled two-way stop valve 4040 is not powered on, the two oil ports are cut off and are not conducted, and when the electrically controlled two-way stop valve 4040 is powered on, the two oil ports are conducted. The electrically controlled two-way shut-off valve 4040 may be, for example, a shut-off valve of KDCFZ01-70/210 model number manufactured by kannli hydraulic machinery manufacturing limited of han, hanan.
In the above scheme, the first control valve 50 is a first three-position four-way reversing valve, and the second control valve 60 is a second three-position four-way reversing valve.
In the above scheme, the first three-position four-way reversing valve has an opening a, an opening b, an opening c and an opening d, the opening c is connected with the oil supply mechanism, the opening d is connected with the oil return tank, the opening a is connected with the first oil pipe 31, the opening b is connected with the second oil pipe 32, the first three-position four-way reversing valve is provided with a first control element 51 which enables the opening b and the opening c to be communicated and enables the opening a and the opening d to be communicated, the first three-position four-way reversing valve is further provided with a second control element 51 which enables the opening a and the opening c to be communicated and enables the opening b and the opening d to be communicated, and the first control element 51 and the second control element 51 are both electromagnetic switches. When the first control element 51 is powered on, the port b is communicated with the port c, and the port a is communicated with the port d, so that the second oil pipe 32 is communicated with the oil inlet mechanism, and the first oil pipe 31 is communicated with the oil return tank; when the second control element 52 is powered on, the port a and the port c are conducted, and the port b and the port d are conducted, so that the first oil pipe 31 is conducted with the oil inlet mechanism, and the second oil pipe 32 is conducted with the oil return tank. When the first control element 51 and the second control element 52 are not electrified, the oil inlet mechanism is communicated with the oil return tank through the port e and the port f.
The utility model discloses in, the structure of second control valve is the same with the structure of first control valve, only is different at the oil pipe that connects. Specifically, the second three-position four-way reversing valve is provided with an opening a, an opening b, an opening c and an opening d, the opening c is connected with the oil supply mechanism, the opening d is connected with the oil return tank, the opening a is connected with the third oil pipe 33, the opening b is connected with the fourth oil pipe 34, a first control piece 61 which enables the opening b and the opening c to be communicated and enables the opening a and the opening d to be communicated is arranged on the second three-position four-way reversing valve, and a second control piece 62 which enables the opening a and the opening c to be communicated and enables the opening b and the opening d to be communicated is further arranged on the second three-position four-way reversing valve. When the first control element 61 is electrified, the port b is communicated with the port c, and the port a is communicated with the port d, so that the fourth oil pipe 34 is communicated with the oil inlet mechanism, and the second oil pipe 32 is communicated with the oil return tank; when the second control element 62 is powered on, the port a and the port c are conducted, and the port b and the port d are conducted, so that the third oil pipe 33 is conducted with the oil inlet mechanism, and the fourth oil pipe 34 is conducted with the oil return tank. When the first control piece 61 and the second control piece 62 are not electrified, the oil inlet mechanism is communicated with the oil return tank through the port e and the port f.
The product form of the present invention is not limited to the embodiment of the present invention, and any person can properly change or modify the product form of the present invention without departing from the scope of the present invention.
Claims (4)
1. Freely control fork mechanism that opens and shuts, including first hydro-cylinder, first control valve, second hydro-cylinder and second control valve, its characterized in that: the rod cavity of the first oil cylinder is connected to an oil port of the first control valve through a first oil pipe, the rodless cavity of the first oil cylinder is connected to the other oil port of the first control valve through a second oil pipe, the rod cavity of the second oil cylinder is communicated with the rod cavity of the first oil cylinder, the hydraulic control system further comprises a two-position three-way electromagnetic valve, the two-position three-way electromagnetic valve is provided with an A port, a P port and a T port, the A port of the two-position three-way electromagnetic valve is connected to an oil port of the second control valve through a third oil pipe, the P port of the two-position three-way electromagnetic valve is communicated with the second oil pipe, the T port of the two-position three-way electromagnetic valve is communicated with the first oil pipe, the rodless cavity of the second oil cylinder is connected to the other oil port of the second control valve through a fourth oil pipe, the hydraulic control system further comprises an electric control two-way stop valve, one oil port of the electric control two-way stop valve is communicated with the second oil pipe, and the other oil port of the electric control two-way stop valve is communicated with the fourth oil pipe.
2. The free control fork opening and closing mechanism of claim 1, wherein: the first control valve is a first three-position four-way reversing valve, and the second control valve is a second three-position four-way reversing valve.
3. The free control fork opening and closing mechanism of claim 2, wherein: the first three-position four-way reversing valve is provided with an a port, a b port, a c port and a d port, the c port is connected with an oil supply mechanism, the d port is connected with an oil return tank, the a port is connected with the first oil pipe, the b port is connected with the second oil pipe, a first control piece which enables the b port and the c port to be communicated and enables the a port and the d port to be communicated is arranged on the first three-position four-way reversing valve, and a second control piece which enables the a port and the c port to be communicated and enables the b port and the d port to be communicated is further arranged on the first three-position four-way reversing valve.
4. The free control fork opening and closing mechanism of claim 3, wherein: the second three-position four-way reversing valve is provided with an a port, a b port, a c port and a d port, the c port is connected with the oil supply mechanism, the d port is connected with the oil return tank, the a port is connected with the third oil pipe, the b port is connected with the fourth oil pipe, a first control piece which enables the b port and the c port to be communicated and enables the a port and the d port to be communicated is arranged on the second three-position four-way reversing valve, and a second control piece which enables the a port and the c port to be communicated and enables the b port and the d port to be communicated is further arranged on the second three-position four-way reversing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022494597.3U CN213865257U (en) | 2020-11-02 | 2020-11-02 | Freely-controlled fork opening and closing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022494597.3U CN213865257U (en) | 2020-11-02 | 2020-11-02 | Freely-controlled fork opening and closing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213865257U true CN213865257U (en) | 2021-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022494597.3U Active CN213865257U (en) | 2020-11-02 | 2020-11-02 | Freely-controlled fork opening and closing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213865257U (en) |
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2020
- 2020-11-02 CN CN202022494597.3U patent/CN213865257U/en active Active
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