CN211447061U - Hydraulic system and double-section movable arm excavator - Google Patents
Hydraulic system and double-section movable arm excavator Download PDFInfo
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- CN211447061U CN211447061U CN201921888473.4U CN201921888473U CN211447061U CN 211447061 U CN211447061 U CN 211447061U CN 201921888473 U CN201921888473 U CN 201921888473U CN 211447061 U CN211447061 U CN 211447061U
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Abstract
The utility model relates to a hydraulic system, in order to solve the problem that two pedals are arranged in the existing double-section movable arm excavator and can not deal with the operation of three actions of double-section movable arm, accessory and single-pedal linear walking, the utility model constructs a hydraulic system and excavator, in the hydraulic system, a hydraulic actuating part is connected with a hydraulic actuating part control valve, a single-pedal pilot valve is connected with a switching valve, a double-pedal linear walking pilot valve and a switching valve are connected with an oil inlet of a single-pedal linear walking shuttle valve, an oil outlet of the single-pedal linear walking shuttle valve is connected with a walking control reversing valve, and a pilot control end of the hydraulic actuating part control valve is connected with the switching valve; the pilot signal output by the single-pedal pilot valve is communicated with the pilot control end of the hydraulic executive control valve or the corresponding oil inlet of the single-pedal linear traveling shuttle valve through the switching valve. The utility model discloses in, switch through the diverter valve, single pedal pilot valve can realize swing arm field angle and the control of single pedal straight line walking to hydraulic pressure executive control valve or walking control switching-over valve control.
Description
Technical Field
The utility model relates to a hydraulic system, more specifically say, relate to a hydraulic system and two festival movable arm excavators.
Background
Most of the work apparatuses of the excavator are provided with a single boom, but under special working conditions, a double-arm boom is provided for a larger excavation range. The expansion angle of the double-section movable arm can be controlled by adjusting the extension of the connecting oil cylinders of the upper movable arm and the lower movable arm of the double-section movable arm. When the opening angle is large, a farther position can be excavated; when the opening angle is small, a closer position can be excavated. The control of the double-section movable arm is realized by a left pedal in the cab. Meanwhile, the excavator is often still provided with a single-pedal linear walking function, linear walking is realized through one pedal under certain working conditions, and the traditional two-pedal control is replaced, so that the operation difficulty can be reduced. However, the left and right sides of the cab of the existing excavator are respectively provided with a pedal, the right pedal controls an accessory device, and the left pedal is used for standby. When the single-movable arm is configured, the left pedal can be used for realizing the linear walking function of the single pedal; when the double-section movable arm is configured, the left pedal can only be used for controlling the opening angle of the double-section movable arm, and cannot be used for realizing other functions.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to set up the problem that two pedals can't deal with the three action operation of two sections movable arms, accessory and the single pedal straight line walking in the current two sections movable arm excavator, and provide a hydraulic system and two sections movable arm excavators to can realize operating two sections movable arms, accessory and the single pedal straight line walking under setting up two pedal circumstances.
The utility model discloses a realize that the technical scheme of its purpose is like: constructing a hydraulic system, which comprises a double-pedal walking pilot valve, a walking control reversing valve, a hydraulic actuating element control valve, a single-pedal pilot valve and a single-pedal linear walking shuttle valve, wherein the hydraulic actuating element control valve is connected with the hydraulic actuating element and is used for controlling the action of the hydraulic actuating element; the hydraulic control system is characterized by further comprising a switching valve, wherein the single-pedal pilot valve is connected with the switching valve, the double-pedal traveling pilot valve and the switching valve are correspondingly connected with an oil inlet of the single-pedal linear traveling shuttle valve, an oil outlet of the single-pedal linear traveling shuttle valve is connected with a pilot control end of a traveling control reversing valve, and a pilot control end of the hydraulic actuator control valve is connected with the switching valve; and a pilot signal output by the single-pedal pilot valve is communicated with a pilot control end of the hydraulic executive control valve or a corresponding oil inlet of the single-pedal linear walking shuttle valve through a switching valve. The utility model discloses in, through the switching of diverter valve, single pedal pilot valve can control hydraulic pressure executive control valve, perhaps controls walking control switching-over valve through single pedal straight line walking shuttle valve, realizes the single pedal straight line walking control of machine.
Further, in the above hydraulic system, the switching valve is an electromagnetic valve, the hydraulic system further includes a controller and a switching key connected to the controller, an output end of the controller is connected to an electromagnetic control end of the switching valve, and the controller controls a working position of the switching valve according to a state of the switching key.
The utility model discloses a realize that the technical scheme of its purpose is like: a double-swing arm excavator is constructed and is characterized by comprising the hydraulic system. Further, the hydraulic actuator is a double-boom cylinder connected between the double-boom. The single-pedal pilot valve is connected with a pilot control end of the hydraulic actuator control valve through a switching valve, so that control over the hydraulic actuator control valve is realized, and the expansion of the connecting oil cylinder between the upper movable arm and the lower movable arm of the double-section movable arm is realized to control the expansion angle of the double-section movable arm. By changing the working position of the switching valve, the single-pedal pilot valve controls the traveling control reversing valve through the switching valve and the single-pedal linear traveling shuttle valve, and the linear traveling single-pedal control of the excavator is realized.
Compared with the prior art, the utility model discloses in, can be connected with single pedal pilot valve through setting up left pedal to realize that the control of opening the angle between swing arm and the lower swing arm on sharp walking single pedal control and the two sections swing arms, can also be through setting up right pedal, be associated with corresponding pilot valve, realize the action operation to the accessory.
Drawings
Fig. 1 is a hydraulic schematic diagram of the excavator with two movable arms according to the present invention.
Part names and serial numbers in the figure:
the device comprises a single-pedal pilot valve 1, a switching valve 2, a double-section movable arm control valve 3, a double-section movable arm oil cylinder 4, a single-pedal linear traveling shuttle valve 5, a double-pedal traveling pilot valve 6, a traveling control reversing valve 7, a switching key 8 and a controller 9.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
Fig. 1 shows a schematic diagram of a hydraulic system of a double-arm excavator in an embodiment of the invention. In the double-section movable arm excavator, the movable arm is a double-section movable arm, a double-section movable arm oil cylinder is arranged between an upper movable arm and a lower movable arm of the double-section movable arm, and the expansion of the double-section movable arm oil cylinder realizes the change of the opening angle between the upper movable arm and the lower movable arm of the double-section movable arm.
The hydraulic system includes a double-pedal traveling pilot valve 6, a traveling control directional control valve 7, a double-arm cylinder 4 as a hydraulic actuator, a double-arm cylinder control valve 3 connected to the double-arm cylinder 4 for controlling the operation of the double-arm cylinder, a single-pedal pilot valve 1, a single-pedal linear traveling shuttle valve 5, a switching valve 2, a controller 9, a switching key 8 connected to the controller, and the like.
The switching valve 2 is a two-position solenoid valve having six oil ports, wherein the oil port a and the oil port B are correspondingly connected to the first pilot pressure signal output port 11 and the second pilot pressure signal output port 12 of the single pedal pilot valve 1, the oil port C and the oil port D are correspondingly connected to the left pilot control end 31 and the right pilot control end 32 of the double-section boom cylinder control valve, and the oil port E and the oil port F are connected to the single pedal linear travel shuttle valve 5.
The single-pedal linear traveling shuttle valve 5 is composed of four shuttle valves, a first oil inlet of the first shuttle valve is connected with a front left pilot pressure signal output port 63 of the double-pedal traveling pilot valve 6 through a connector 56, and a first oil inlet of the second shuttle valve is connected with a rear left pilot pressure signal output port 64 of the double-pedal traveling pilot valve 6 through a connector 55.
The first oil inlet of the third shuttle valve is connected with a right front pilot pressure signal output port 61 of the double-pedal walking pilot valve 6 through a connector 54, and the first oil inlet of the fourth shuttle valve is connected with a right rear pilot pressure signal output port 62 of the double-pedal walking pilot valve 6 through a connector 53.
The second oil inlet of the second shuttle valve and the second oil inlet of the fourth shuttle valve are simultaneously connected with the E oil port of the switching valve 2 through a connector 51, and the second oil inlet of the first shuttle valve and the third oil inlet of the fourth shuttle valve are simultaneously connected with the F oil port of the switching valve 2 through a connector 52.
The oil outlet of the first shuttle valve is connected with the left front pilot control end of the walking control reversing valve 7 through a connector 50, the oil outlet of the second shuttle valve is connected with the left rear pilot control end of the walking control reversing valve 7 through a connector 59, the oil outlet of the third shuttle valve is connected with the right front pilot control end of the walking control reversing valve 7 through a connector 58, and the oil outlet of the fourth shuttle valve is connected with the right rear pilot control end of the walking control reversing valve 7 through a connector 57.
The switch key 8 is connected with the controller 9, the output end of the controller is connected with the electromagnetic control end of the switch valve, and the controller controls the working position of the switch valve 2 according to the state of the switch key.
In order to control the excavator in an operation mode, the double-section movable arm excavator is provided with a walking double-pedal in a cab, the walking double-pedal is associated with a double-pedal walking pilot valve 6, and the two pedals are respectively used for controlling a left walking motor and a right walking motor of the excavator. A right foot pedal is arranged on the right side of the cab, is associated with an accessory control pilot valve in an excavator accessory hydraulic system, and controls the action of the accessory through the right foot pedal.
And a left pedal is arranged on the left side of the cab, is associated with the single-pedal pilot valve 1 and is used for realizing single-pedal linear walking control and opening angle control of the double-section movable arm of the excavator.
In the embodiment, the operator can realize the forward and backward straight walking and the steering operation in the left-front, right-front, left-back and right-back directions of the excavator through the double pedals. The excavator can also be operated by the left pedal in a straight line walking manner. When the single-pedal linear walking operation is carried out, the controller outputs a control signal through the switching key, the switching valve is enabled to work at the lower position, the oil port A of the switching valve is communicated with the oil port E, the oil port B of the switching valve is communicated with the oil port F of the switching valve, and a pilot pressure signal output by the single-pedal pilot valve 1 simultaneously acts on the left front pilot control end and the right front pilot control end of the walking control reversing valve 7 through the switching valve and the single-pedal linear walking shuttle valve 5 to realize the forward linear walking of the excavator or simultaneously acts on the left rear pilot control end and the right rear pilot control end of the walking control reversing valve 7 to realize the backward linear walking of the excavator. When the double-section movable arm needs to be adjusted, the controller outputs a control signal through the switching key, so that the switching valve works at an upper position, the oil port A of the switching valve is communicated with the oil port C, the oil port B of the switching valve is communicated with the oil port D of the switching valve, and a pilot pressure signal output by the single-pedal pilot valve 1 acts on the left pilot control end 31 or the right pilot control end 32 of the double-section movable arm control valve 3 through the switching valve, so that the double-section movable arm oil cylinder 4 is stretched.
In this embodiment, the control of the switching valve may also be performed by a circuit without a controller, for example, the electromagnetic control end of the switching valve is directly connected to the power supply through a switch, or the switching valve is a non-electromagnetic valve, the spool of which is directly connected to the pull rod, and the switching valve is shifted by the mechanical action of the connecting rod.
In this embodiment, the hydraulic actuator is a double-swing arm cylinder 4, and in a specific implementation, the hydraulic actuator may be an accessory hydraulic actuator, at this time, the single-pedal linear travel operation of the excavator and the operation of the accessory share the single-pedal pilot valve 1, and the switching between the two different working conditions, namely the accessory operation and the single-pedal linear travel, is realized by switching the switching valve.
Claims (5)
1. A hydraulic system comprises a double-pedal walking pilot valve, a walking control reversing valve, a hydraulic actuating element control valve, a single-pedal pilot valve and a single-pedal linear walking shuttle valve, wherein the hydraulic actuating element control valve is connected with the hydraulic actuating element and used for controlling the action of the hydraulic actuating element;
the hydraulic control system is characterized by further comprising a switching valve, wherein the single-pedal pilot valve is connected with the switching valve, the double-pedal traveling pilot valve and the switching valve are correspondingly connected with an oil inlet of the single-pedal linear traveling shuttle valve, an oil outlet of the single-pedal linear traveling shuttle valve is connected with a pilot control end of a traveling control reversing valve, and a pilot control end of the hydraulic actuator control valve is connected with the switching valve; and a pilot signal output by the single-pedal pilot valve is communicated with a pilot control end of the hydraulic executive control valve or a corresponding oil inlet of the single-pedal linear walking shuttle valve through a switching valve.
2. The hydraulic system of claim 1, wherein the switching valve is a solenoid valve.
3. The hydraulic system according to claim 2, further comprising a controller, and a switch key connected to the controller, wherein an output end of the controller is connected to the electromagnetic control end of the switch valve, and the controller controls the working position of the switch valve according to a state of the switch key.
4. A double-arm excavator characterized by comprising the hydraulic system of any one of claims 1 to 3.
5. The double-arm excavator according to claim 4, wherein the hydraulic actuator is a double-arm cylinder connected between the double arms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921888473.4U CN211447061U (en) | 2019-11-05 | 2019-11-05 | Hydraulic system and double-section movable arm excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921888473.4U CN211447061U (en) | 2019-11-05 | 2019-11-05 | Hydraulic system and double-section movable arm excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211447061U true CN211447061U (en) | 2020-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921888473.4U Active CN211447061U (en) | 2019-11-05 | 2019-11-05 | Hydraulic system and double-section movable arm excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211447061U (en) |
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2019
- 2019-11-05 CN CN201921888473.4U patent/CN211447061U/en active Active
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