CN219450893U - Hydraulic and electric device for controlling lifting of cab of excavator - Google Patents
Hydraulic and electric device for controlling lifting of cab of excavator Download PDFInfo
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- CN219450893U CN219450893U CN202320321886.4U CN202320321886U CN219450893U CN 219450893 U CN219450893 U CN 219450893U CN 202320321886 U CN202320321886 U CN 202320321886U CN 219450893 U CN219450893 U CN 219450893U
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Abstract
The utility model provides a liquid electric device for controlling the lifting of an excavator cab, wherein one end of a first switch is connected with the positive electrode of a power supply, the other end of the first switch is connected with a normally closed contact of a second relay, one end of a coil of the first relay is connected with the normally closed contact of the second relay, the other end of the coil of the first relay is coupled with the negative electrode of the power supply, one end of a normally open contact of the first relay is coupled with the positive electrode of the power supply, the other end of the normally open contact of the first relay is connected with one end of a coil below a three-position four-way electromagnetic reversing valve, one end of a normally open contact of a third relay is coupled with the positive electrode of the power supply, the other end of the normally open contact of the third relay is connected with one end of a coil of a two-position three-way electromagnetic valve, one end of a throttle valve is connected with the two-position three-way electromagnetic valve, the other end of the throttle valve is connected with a three-position four-way electromagnetic reversing valve, and the three-position four-way electromagnetic reversing valve is respectively connected with a lifting oil cylinder and an oil tank of the cab. The device can control the cab of the excavator to rise and fall, enlarge the visual field range of the driver, and improve the working efficiency and the safety performance of the excavator.
Description
Technical Field
The utility model relates to the technical field of engineering machinery, in particular to a hydraulic and electric device for controlling lifting of an excavator cab.
Background
In engineering construction, the hydraulic excavator is a common machine, and the cab can not be lifted under many working conditions, so that the position of a driver is not high enough, the visual field range is not large enough, the working efficiency is reduced, and the safety performance is also influenced.
In application number: in the chinese patent application CN201610075495.3, a lifting hydraulic system for an excavator cab is related, which includes a lifting control valve, a lifting reversing valve, a pressure maintaining valve, a shuttle valve and a lifting cylinder, wherein a piston rod of the lifting cylinder is in transmission connection with the cab; the lifting control oil port of the lifting control valve is connected with the lifting control oil port of the lifting reversing valve, the descending control oil port of the lifting control valve is connected with the descending control oil port of the lifting reversing valve, and meanwhile, the descending control oil port of the lifting control valve is also connected with the control oil port of the pressure maintaining valve through the oil inlet and the oil outlet of the shuttle valve; the rodless cavity of the lifting oil cylinder is communicated with the oil outlet of the pressure maintaining valve, the rod cavity is communicated with the A port of the lifting reversing valve, the oil inlet of the pressure maintaining valve is communicated with the B port of the lifting reversing valve, and the oil return port of the pressure maintaining valve is connected with the oil return tank. The utility model enables the driver to adjust the height of the cab according to actual needs, thereby facilitating operation.
In application number: in chinese patent application No. cn202010477349.X, a lifting hydraulic system for an excavator cab and an excavator are related. The lifting hydraulic system of the excavator cab comprises a hydraulic pump, a lifting oil cylinder, a first reversing valve and an energy accumulator, wherein the first reversing valve is arranged between the hydraulic pump and the lifting oil cylinder to control the lifting oil cylinder to act, and an oil port of the energy accumulator is connected with a rodless cavity of the lifting oil cylinder. According to the utility model, the accumulator is additionally arranged at the rodless cavity end of the lifting oil cylinder, so that pressure fluctuation in the ascending and descending processes is effectively reduced, the ascending and descending stability of the cab is improved, and the driving experience is further improved.
In application number: in the chinese patent application of CN202010509930.5, a cab lifting hydraulic control system and an excavator are related to the technical field of engineering machinery. The hydraulic control system comprises an oil tank, a hydraulic pump, a reversing valve bank, a first hydraulic control one-way valve, a second hydraulic control one-way valve, a lifting oil cylinder and a controller, wherein the oil tank is connected with the hydraulic pump, the hydraulic pump is connected with the reversing valve bank, the reversing valve bank is connected with a rodless cavity of the lifting oil cylinder through a first hydraulic oil way, the reversing valve bank is connected with a rod cavity of the lifting oil cylinder through a second hydraulic oil way, the first hydraulic oil way is provided with the first hydraulic control one-way valve, the second hydraulic oil way is provided with the second hydraulic control one-way valve, a pilot oil way of the first hydraulic control one-way valve is communicated with the second hydraulic oil way, the lifting oil cylinder is used for being connected with a lifting structure of a cab, and the controller is connected with the reversing valve bank and used for controlling lifting of the cab through the reversing valve bank. The height of the cab can be adjusted as required, so that the operation difficulty is reduced, and the construction efficiency is improved.
The prior art is greatly different from the utility model, the technical problem which is needed to be solved by the user cannot be solved, and the utility model provides a novel hydraulic and electric device for controlling the lifting of the cab of the excavator.
Disclosure of Invention
The utility model aims to provide a hydraulic device for controlling the lifting of an excavator cab, which can control the lifting of the cab of the excavator, can also fall down, enlarge the visual field range of a driver and improve the working efficiency and the safety performance of the excavator.
The aim of the utility model can be achieved by the following technical measures: the hydraulic device for controlling the lifting of the cab of the excavator comprises a first relay, a second relay, a third relay, a first switch, a two-position three-way electromagnetic valve, a three-position four-way electromagnetic reversing valve, a cab lifting cylinder, a throttle valve and an oil tank, wherein one end of the first switch is coupled with the positive electrode of a power supply, the other end of the first switch is connected with a normally closed contact of the second relay, one end of a coil of the first relay is connected with the normally closed contact of the second relay, the other end of the coil of the first relay is connected with the negative electrode of the power supply, one end of a normally open contact of the first relay is coupled with the positive electrode of the power supply, the other end of the coil of the three-position four-way electromagnetic reversing valve is connected with one end of the power supply, one end of the normally open contact of the third relay is coupled with the positive electrode of the power supply, the other end of the coil of the two-position three-way electromagnetic valve is grounded, the two-position three-way electromagnetic valve is connected with the oil tank of the excavator, one end of the throttle valve is connected with the two-way, the other end of the throttle valve is connected with the three-way electromagnetic reversing valve and the three-way electromagnetic reversing valve.
The aim of the utility model can be achieved by the following technical measures:
the hydraulic device for controlling the lifting of the cab of the excavator further comprises a second switch, one end of the second switch is coupled with the positive electrode of the power supply, the other end of the second switch is connected with the normally closed contact of the first relay, one end of a coil of the second relay is connected with the normally closed contact of the first relay, and the other end of the coil of the second relay is connected with the negative electrode of the power supply.
One end of the normally open contact of the second relay is coupled with the positive electrode of the power supply, the other end of the normally open contact of the second relay is connected with one end of the upper coil of the three-position four-way electromagnetic reversing valve, and the other end of the upper coil of the three-position four-way electromagnetic reversing valve is grounded.
The hydraulic device for controlling the lifting of the cab of the excavator further comprises a first diode, wherein the positive electrode of the first diode is connected with a normally closed contact connected with the first relay through the second relay, the negative electrode of the first diode is connected with one end of a coil of the third relay, and the other end of the coil of the third relay is grounded.
The hydraulic device for controlling the lifting of the cab of the excavator further comprises a second diode, wherein the positive electrode of the second diode is connected with a normally closed contact connected with the coil of the first relay and the coil of the second relay, the negative electrode of the second diode is connected with one end of the coil of the third relay, and the other end of the coil of the third relay is grounded.
The hydraulic device for controlling the lifting of the cab of the excavator further comprises a fuse, wherein the fuse is connected to the positive electrode of the power supply, and the normally open contact of the first relay, the normally open contact of the second relay, the normally open contact of the third relay, the first switch and the second switch are all connected to the positive electrode of the power supply through the fuse.
The power supply adopts 24V or 12V direct current power supply of the excavator.
The rated voltages of coils of the first relay, the second relay and the third relay are matched with the voltage of the excavator.
Coil voltages of the two-position three-way electromagnetic valve and the three-position four-way electromagnetic reversing valve are matched with voltages of the excavator.
The hydraulic and electric device for controlling the lifting of the cab of the excavator changes the cab of the excavator from a fixed position state to a lifting state by adopting the cooperation of an electric technology and a hydraulic control technology, and can enable a driver to lift the cab to a position and overlook or head up to operate the machine under special working conditions such as forests, tall obstacles, dangerous objects and the like, thereby facilitating the operation and improving the working efficiency and the safety performance of the excavator.
Drawings
Fig. 1 is a circuit diagram of an embodiment of the hydraulic device for controlling the elevation of the cab of an excavator according to the present utility model.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular forms also are intended to include the plural forms unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, and/or combinations thereof.
The utility model discloses a hydraulic and electric device for making the lifting of an excavator cab, which comprises: three relays, two switches, a two-position three-way electromagnetic valve, a three-position four-way electromagnetic reversing valve, a cab lifting oil cylinder, two diodes, a throttle valve, an oil tank, a wire, a hydraulic oil pipeline and the like.
One end of the first switch is connected with the positive electrode of the power supply through a fuse, the other end of the first switch is connected with the normally closed contact of the second relay, one end of the coil of the first relay is connected with the normally closed contact of the second relay, and the other end of the coil of the first relay is connected with the negative electrode of the power supply.
The positive pole of the first diode is connected with a normally closed contact of the second relay connected with the coil of the first relay, the negative pole is connected with one end of the coil of the third relay, and the other end of the coil of the third relay is grounded.
One end of a normally open contact of the first relay is connected to the positive electrode of the power supply through a fuse, the other end of the normally open contact is connected to one end of a lower coil of the three-position four-way electromagnetic reversing valve, and the other end of the lower coil of the three-position four-way electromagnetic reversing valve is grounded.
One end of the normally open contact of the third relay is connected to the positive electrode of the power supply through a fuse, the other end of the normally open contact of the third relay is connected to one end of the coil of the two-position three-way electromagnetic valve, and the other end of the coil of the two-position three-way electromagnetic valve is grounded.
The two-position three-way electromagnetic valve is connected to the excavator oil way, one end of the throttle valve is connected to the two-position three-way electromagnetic valve, the other end of the throttle valve is connected to the three-position four-way electromagnetic reversing valve, and the three-position four-way electromagnetic reversing valve is respectively connected to the cab lifting oil cylinder and the oil tank.
One end of the second switch is connected with the positive electrode of the power supply through a fuse, the other end of the second switch is connected with the normally closed contact of the first relay, one end of the coil of the second relay is connected with the normally closed contact of the first relay, and the other end of the coil of the second relay is connected with the negative electrode of the power supply.
The positive pole of the second diode is connected with a normally closed contact connected with the coil of the first relay and the coil of the second relay, the negative pole is connected with one end of the coil of the third relay, and the other end of the coil of the third relay is grounded.
One end of the normally open contact of the second relay is connected to the positive electrode of the power supply through a fuse, the other end of the normally open contact of the second relay is connected to one end of the upper coil of the three-position four-way electromagnetic reversing valve, and the other end of the upper coil of the three-position four-way electromagnetic reversing valve is grounded.
As shown in fig. 1, fig. 1 is a circuit diagram of a hydraulic device for controlling the elevation of an excavator cab according to the present utility model. The hydraulic and electric device for controlling the lifting of the cab of the excavator consists of a power supply, a relay KA1, a relay KA2, a relay KA3, a diode D1, a diode D2, a lifting switch K1, a descending switch K2, a 14 two-position three-way electromagnetic valve, a 16 three-position four-way electromagnetic reversing valve, a 17 cab lifting cylinder and an 18 throttle valve.
The 10 fuse is an electrical fuse.
When the 1 rising switch K1 is closed, current passes through the normally closed contact of the 2 relay KA2 and the coil of the 3 relay KA1 and then reaches the negative electrode of the power supply to form a closed loop, and the relay KA1 works; meanwhile, the current flowing through the normally closed contact of the relay KA2 and the current flowing through the diode D1 pass through the coil of the relay KA3 and then are grounded, and the relay KA3 and the relay KA1 act simultaneously;
after the rising switch K1 is closed, the relay KA1 acts, the normally open contact is closed, and the current reaches the lower coil of the 16 three-position four-way electromagnetic reversing valve through the normally open contact of the 12 relay KA1 and is grounded, so that the lower position of the 16 three-position four-way electromagnetic reversing valve works; meanwhile, due to the action of the relay KA3, the normally open contact is closed, the current is grounded through the coil of the 14 two-position three-way electromagnetic valve after passing through the normally open contact of the relay KA3, the 14 two-position three-way electromagnetic valve acts, and the lower position of the 14 two-position three-way electromagnetic valve works; hydraulic oil from an excavator oil way passes through a 14 two-position three-way electromagnetic valve and then reaches a large cavity of a 17 cab lifting oil cylinder through an 18 throttle valve and a 16 three-position four-way electromagnetic reversing valve, oil in a small cavity of the hydraulic oil returns to the oil tank through the 16 three-position four-way electromagnetic reversing valve, and the cab lifting action is completed;
when the 7-step down switch K2 is closed, the current passes through the normally closed contact of the 8-relay KA1 and the coil of the 9-relay KA2 and then reaches the negative electrode of the power supply to form a closed loop, and the relay KA2 works; the current flowing through the normally closed contact of the relay KA1 and the unidirectional conducting 5 diode D2 passes through the coil of the relay KA3 and then is grounded, and the relay KA3 and the relay KA2 act simultaneously;
after the 7-step down switch K2 is closed, the relay KA2 acts, the normally open contact is closed, and the current reaches the upper coil of the 16 three-position four-way electromagnetic reversing valve through the normally open contact of the 13 relay KA2 and is grounded, so that the upper position of the 16 three-position four-way electromagnetic reversing valve works; meanwhile, due to the action of the relay KA3, the normally open contact is closed, the current is grounded through the coil of the 14 two-position three-way electromagnetic valve after passing through the normally open contact of the relay KA3, the 14 two-position three-way electromagnetic valve acts, and the lower position of the 14 two-position three-way electromagnetic valve works; hydraulic oil from an excavator oil way passes through a 14 two-position three-way electromagnetic valve and then passes through an 18 throttle valve and a 16 three-position four-way electromagnetic reversing valve to reach a small cavity of a 17 cab lifting oil cylinder, and oil in a large cavity of the hydraulic oil passes through the 16 three-position four-way electromagnetic reversing valve to return to a 15 oil tank, so that the cab descending action is completed;
the 4 diode D1 and the 5 diode D2 have the functions of ensuring that the coil of the 3 relay KA1 or the coil of the 9 relay KA2 can work when the coil of the 6 relay KA3 works, so that the coil of the 14 two-position three-way electromagnetic valve can work in a power-on way, and an oil way from the excavator is opened;
the normally closed contact of the relay KA2 and the normally closed contact of the relay KA1 play an interlocking role.
The function of the 18 throttle valve is to adjust 17 the lift speed of the cab lift cylinder.
The power supply directly uses 24V or 12V direct current power supply of the excavator;
the coil rated voltages of the relays KA1, KA2, KA3 are to be matched with the voltage of the excavator to be used. Generally, the power supply voltage is 12V for small excavators, where the voltage is 24V for medium and large excavators, and is required to be configured according to electrical specifications for electric excavators.
Coil voltages of the 14 two-position three-way electromagnetic valve and the 16 three-position four-way electromagnetic reversing valve are matched with voltages of the excavator to be used; the coils of these two solenoid valves also meet the power supply voltage requirements of the excavator itself, generally 12V for small excavators, 24V for medium and large excavators and electrical requirements for electric excavators.
The 4 two-position three-way electromagnetic valve, the 16 three-position four-way electromagnetic reversing valve, the 18 throttle valve, the relay and the like are all arranged at the convenient position of the excavator.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but although the present utility model has been described in detail with reference to the foregoing embodiment, it will be apparent to those skilled in the art that modifications may be made to the technical solution described in the foregoing embodiment, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Other than the technical features described in the specification, all are known to those skilled in the art.
Claims (9)
1. The hydraulic device for controlling the lifting of the cab of the excavator is characterized by comprising a first relay, a second relay, a third relay, a first switch, a two-position three-way electromagnetic valve, a three-position four-way electromagnetic reversing valve, a cab lifting oil cylinder, a throttle valve and an oil tank, wherein one end of the first switch is coupled with the positive electrode of a power supply, the other end of the first switch is connected with a normally closed contact of the second relay, one end of a coil of the first relay is connected with the normally closed contact of the second relay, the other end of the coil of the first relay is connected with the negative electrode of the power supply, one end of a normally open contact of the first relay is coupled with the positive electrode of the power supply, the other end of the coil of the three-position four-way electromagnetic reversing valve is grounded, one end of the normally open contact of the third relay is coupled with the positive electrode of the power supply, the other end of the coil of the two-position three-way electromagnetic valve is grounded, the two-position three-way electromagnetic valve is connected with the oil circuit of the excavator, one end of the throttle valve is connected with the two-position three-way electromagnetic valve, the other end of the coil of the three-way electromagnetic valve is connected with the three-way electromagnetic valve, and the three-way electromagnetic reversing valve is connected with the three-way valve.
2. The hydraulic device for controlling the lifting of the cab of the excavator according to claim 1, further comprising a second switch, wherein one end of the second switch is coupled to the positive electrode of the power supply, the other end of the second switch is connected to the normally-closed contact of the first relay, one end of the coil of the second relay is connected to the normally-closed contact of the first relay, and the other end of the coil of the second relay is connected to the negative electrode of the power supply.
3. The hydraulic device for controlling the lifting of the cab of the excavator according to claim 2, wherein one end of the normally open contact of the second relay is coupled to the positive electrode of the power supply, and the other end is connected to one end of the upper coil of the three-position four-way electromagnetic directional valve, and the other end of the upper coil of the three-position four-way electromagnetic directional valve is grounded.
4. A hydraulic device for controlling lifting of an excavator cab according to claim 3, further comprising a first diode, wherein the positive electrode of the first diode is connected to a normally closed contact of the second relay and the first relay, the negative electrode is connected to one end of a coil of the third relay, and the other end of the coil of the third relay is grounded.
5. The hydraulic device for controlling the lifting of an excavator cab according to claim 4, further comprising a second diode, wherein the anode of the second diode is connected to a normally closed contact of the first relay and the second relay coil, the cathode is connected to one end of the third relay coil, and the other end of the third relay coil is grounded.
6. The hydraulic device for controlling the elevation of the cab of the excavator of claim 3 further comprising a fuse connected to the positive power supply, the normally open contact of the first relay, the normally open contact of the second relay, the normally open contact of the third relay, the first switch and the second switch being connected to the positive power supply through the fuse.
7. The hydraulic device for controlling the lifting of the cab of the excavator according to claim 1, wherein the power supply is a 24V or 12V dc power supply of the excavator.
8. The hydraulic device for controlling the lifting of the cab of the excavator according to claim 1, wherein the rated voltages of the coils of the first relay, the second relay and the third relay are matched with the voltage of the excavator.
9. The hydraulic device for controlling the lifting of the cab of the excavator according to claim 1, wherein the coil voltages of the two-position three-way electromagnetic valve and the three-position four-way electromagnetic directional valve are matched with the voltage of the excavator to be used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320321886.4U CN219450893U (en) | 2023-02-27 | 2023-02-27 | Hydraulic and electric device for controlling lifting of cab of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320321886.4U CN219450893U (en) | 2023-02-27 | 2023-02-27 | Hydraulic and electric device for controlling lifting of cab of excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219450893U true CN219450893U (en) | 2023-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320321886.4U Active CN219450893U (en) | 2023-02-27 | 2023-02-27 | Hydraulic and electric device for controlling lifting of cab of excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219450893U (en) |
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2023
- 2023-02-27 CN CN202320321886.4U patent/CN219450893U/en active Active
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