CN211778290U - Multi-way valve of miniature excavator - Google Patents
Multi-way valve of miniature excavator Download PDFInfo
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- CN211778290U CN211778290U CN202020051014.7U CN202020051014U CN211778290U CN 211778290 U CN211778290 U CN 211778290U CN 202020051014 U CN202020051014 U CN 202020051014U CN 211778290 U CN211778290 U CN 211778290U
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Abstract
The utility model discloses a multi-way valve of a miniature excavator, wherein a linear walking link, a rotary link, a movable arm deflection link, a bucket rod link, a movable arm link, a bucket link and at least one group of auxiliary links are integrated in the multi-way valve; the multi-way valve is characterized in that the linear walking link is provided with a working position with a throttling opening, the multi-way valve is further provided with an auxiliary pressure oil port which is connected with the third pressure oil port in parallel to the linear walking link, and the auxiliary pressure oil port is connected with a quick-change lock control valve of the miniature excavator outside the valve. The utility model discloses a multi-way valve adopts above-mentioned technical scheme, has improved miniature excavator's work efficiency, and at the in-process of operation, operating handle gets back to the meso position and makes the transient during operation that stops, makes the engine get into the idle state of low rotational speed automatically to reduce the no-load energy consumption loss of excavator, avoided unnecessary power waste, play the purpose that reduces the oil consumption, set up supplementary antithetical couplet and support many accessories and carry on, satisfy the different operation demands of miniature excavator.
Description
Technical Field
The utility model belongs to excavator hydraulic pressure technique, concretely relates to miniature excavator multi-way valve.
Background
The mini excavator is widely applied to engineering operation in narrow places such as indoor removal, urban transformation, landscaping and the like. The multi-way valve serving as the hydraulic control main body part of the mini excavator has the characteristics of high integration level, fine flow distribution, multi-action compounding and the like.
The main control multi-way valve of the existing mini excavator is controlled by total power, two or three variable pumps are used for driving, the purposes of energy conservation and high efficiency can be achieved during excavation, various auxiliary tools are required to be attached under various operating environments, but the hydraulic circuit of the existing mini excavator does not support multiple auxiliary tool carrying, and a hydraulic control oil circuit of the auxiliary tool is required to be designed independently. In addition, in the process of replacing the auxiliary tool, the excavator is in an idle state, but an engine driving a hydraulic system is always in a high-rotation-speed working state, so that the problem that the rotation speed of the engine cannot be reduced during short stop exists, and the energy consumption in the idle state is increased.
Disclosure of Invention
The utility model provides a technical problem be: aiming at the problems that the prior multi-way valve of the mini-excavator is lack of auxiliary design and high in energy consumption during idling, the improved multi-way valve of the mini-excavator is provided.
The utility model discloses a following technical scheme realizes:
a multi-way valve of a miniature excavator is characterized in that a linear walking link 1, a rotary link 2, a movable arm deflection link 5, an arm link 7, a movable arm link 10, a bucket link 11 and at least one group of auxiliary links are integrated in the multi-way valve;
the multi-way valve is at least provided with a first pressure oil port, a second pressure oil port and a third pressure oil port, and the first pressure oil port, the second pressure oil port and the third pressure oil port are respectively connected with a first main pump, a second main pump and a third main pump of the excavator;
in the multi-way valve, control valves of the linear walking link 1, the rotary link 2 and the movable arm deflection link 5 are positioned on a third control loop connected with a third pressure oil port, the arm link 7 is positioned on a second control loop of a second pressure oil port, the movable arm link 10 and the bucket link 11 are positioned on a first control loop of a first pressure oil port, and a control valve of the auxiliary link is positioned on a control loop of any pressure oil port;
the straight walking linkage 1 is provided with a working position with a throttling opening, the multi-way valve is further provided with an auxiliary pressure oil port which is connected with the third pressure oil port in parallel to the straight walking linkage 1, and the auxiliary pressure oil port is connected with a quick-change lock control valve of the miniature excavator outside the valve.
Further, a blade assembly 3 for controlling a blade of the excavator is further integrated, and a control valve of the blade assembly 3 is located on a first control loop connected with the first pressure oil port.
Furthermore, a left walking link 9 and a right walking link 8 for controlling the chassis of the excavator to steer are further integrated, and control valves of the left walking link 9 and the right walking link 8 are respectively positioned on the first control loop and the second control loop.
The utility model discloses an among the miniature excavator multiple unit valve, the multiple unit valve still is equipped with idle speed monitoring pressure hydraulic fluid port, idle speed detection pressure hydraulic fluid port is at the inside automatic idle detection return circuit that forms of multiple unit valve, automatic idle detection return circuit is with the inside control valve meso position series connection intercommunication that removes other antithetical couplets of straight line walking antithetical couplet of multiple unit valve to set up the pressure signal detection hydraulic fluid port with automatic idle detection return circuit intercommunication on the multiple unit valve, pressure signal feedback is connected to engine speed control module.
Specifically, the pressure signal detection oil port is provided with a pressure sensing element, and the pressure sensing element is connected with the engine rotating speed control module in a feedback manner
The utility model discloses an integration is equipped with supplementary antithetical couplet in the multiple unit valve, and the control valve of supplementary antithetical couplet is used for the auxiliary tool fuel feeding for carrying on, can make miniature excavator support carry on different operation devices, like auxiliary machines such as grapple ware, agitator, quartering hammer, hydraulic tong to have excavation, breakage, grab multiple functions such as soil, pine, realize "a tractor serves several purposes", satisfy different operation demands.
The utility model discloses a multi-way valve has the supplementary oily function of getting that is used for quick change lock control valve. Through the control valve of the control straight line walking antithetical couplet, utilize the throttling action of the choke of this control valve, supply quick change lock control valve to get oil through the auxiliary pressure hydraulic port, but quick replacement annex, equipment utilization improves greatly.
The utility model discloses a multiple unit valve has automatic idle speed monitoring function, satisfies the needs that need temporarily shut down among the miniature excavator operation process, for example wait for some corollary equipment, other supplementary preparation work wait to do short duration shut down, at this moment dig the machine and be in the state of awaiting orders, and all operating handle are in the meso position, and the control engine is in low rotational speed idle state.
To sum up, the utility model discloses a multi-way valve adopts above-mentioned technical scheme, has improved miniature excavator's work efficiency, and at the in-process of operation, operating handle gets back to the mesopic operation when short stop work, makes the automatic idle state that gets into the low rotational speed of engine to reduce the no load energy consumption loss of excavator, avoided unnecessary power waste, play the purpose that reduces the oil consumption, set up supplementary antithetical couplet and support many accessories and carry on, satisfy the different operation demands of miniature excavator.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
FIG. 1 is a schematic diagram of a hydraulic circuit of a multi-way valve in an embodiment.
Fig. 2 is a first control circuit route diagram connected to the first main pump in the embodiment.
Fig. 3 is a second control circuit route diagram connected to the second main pump in the embodiment.
Fig. 4 is a third control circuit route diagram connected to the third main pump in the embodiment.
Fig. 5 is a schematic diagram of an oil path for achieving auxiliary oil extraction of the quick-change lock control valve in the embodiment.
FIG. 6 is a schematic diagram of an automatic idle detection circuit in an embodiment.
Reference numbers in the figures: 1-linear walking link, 2-rotation link, 3-blade link, 4-auxiliary link, 5-movable arm deflection link, 6-auxiliary link, 7-bucket rod link, 8-right walking link, 9-left walking link, 10-movable arm link, 11-bucket link and 100-automatic idle speed detection loop.
Detailed Description
Examples
Referring to fig. 1, the multi-way valve in the figure is a preferred embodiment of the present invention, a straight walking link 1, a turning link 2, a dozer blade link 3, an auxiliary link 4, a boom deflection link 5, an auxiliary link 6, a dipper link 7, a right walking link 8, a left walking link 9, a boom link 10, and a bucket link 11 are integrated in the multi-way valve of this embodiment, each link is provided with a reversing control valve corresponding to an actuating element, such as the turning link 2 corresponds to a cart assembly turning motor, the dozer blade link 3 corresponds to a dozer cylinder, if an excavator without a dozer blade is provided, the link is not provided, the boom deflection link 5 corresponds to a boom deflection cylinder, the auxiliary link 6 and the auxiliary link 4 correspond to an excavator loaded auxiliary hydraulic actuator, the actual number can be designed according to auxiliary tools required to be equipped for a mini excavator, the dipper link 7 corresponds to a dipper cylinder, the right walking link 8 and the left walking link 9 correspond to left and right walking motors of a chassis respectively, the right walking link 8 and the left walking link 9 can also be independently arranged, integrated control through a multi-way valve is not needed, the movable arm link 10 corresponds to a movable arm cylinder, the bucket link 11 corresponds to a bucket cylinder, and the specific structure of each control valve can refer to the hydraulic design of the existing excavator, and the embodiment is not described herein in detail. The multi-way valve is provided with a first pressure port P1, a second pressure port P2 and a third pressure port P3, the first pressure port P1 is connected with a first main pump through a pipeline outside the valve, the second pressure port P2 is connected with a second main pump through a pipeline outside the valve, and a third pressure port P3 is connected with a third main pump through a pipeline outside the valve. In addition, the multi-way valve is necessarily provided with a plurality of oil return ports for realizing the communication of the hydraulic circuit, such as the oil return port T3 in FIG. 1.
In a hydraulic oil circuit of a micro excavator, main overflow valves are respectively arranged on a hydraulic oil circuit between a pump and an execution element, overload overflow valves are respectively arranged on a movable arm link 10, an arm link 7, a bucket link 11, an auxiliary first link 6 and an auxiliary second link 4 in a multi-way valve, the overload overflow valves are positioned between an actuator and an oil tank, the movable arm link 10 is also provided with a movable arm anti-settling valve, when a movable arm operating lever is positioned at a middle position, the movable arm is prevented from settling, the above all belong to conventional settings in an excavator hydraulic system, and the details of the embodiment are not repeated.
In the multi-way valve of this embodiment, the control valves of the linear traveling link 1, the rotating link 2, the dozer blade link 3, the auxiliary link 4, the movable arm deflecting link 5 and the auxiliary first link 6 are located on a third control circuit connected to a third pressure port P3, the third control circuit is specifically shown by a thick solid line in fig. 4, the control valve of the linear traveling link thereon is in the right position, and when the control valves of the other links are in the middle position, oil provided by the third main pump flows from the third pressure port P3, flows through the right position of the control valve of the linear traveling link 1, the middle position of the control valve of the rotating link 2, the middle position of the control valve of the dozer blade link 3, the middle position of the control valve of the auxiliary link 4, the middle position of the control valve of the movable arm deflecting link 5 and the middle position of the control valve of the auxiliary first link 6, and then returns to.
The control valve of the auxiliary first coupler 6 is also located on a second control loop connected with a second pressure oil port P2, confluence oil supply is performed on the auxiliary first coupler 6 through a second pressure oil port P2 and a first pressure oil port P1, in addition, the control valves of the arm coupler 7 and the right walking coupler 8 are also located on the second control loop, the second control loop is specifically shown as a thick solid line in fig. 3, in the second control loop, when the control valves of all the couplers are in a middle position, oil provided by a second main pump flows through a control valve middle position of the right walking coupler 8, the control valve middle position of the arm coupler 7 and the control valve middle position of the auxiliary first coupler 6 from the second pressure oil port P2 and then returns to the oil tank through an oil return port T3.
The control valves of the left traveling linkage 9, the boom linkage 10 and the bucket linkage 11 are located on a first control circuit connected to a first pressure port P1, the first control circuit is specifically shown as a thick solid line in fig. 2, in the first control circuit, when the control valves of all the linkages are in a neutral position, oil supplied by the first main pump flows from the first pressure port P1, flows through a neutral position of the control valve of the left traveling linkage 9, a neutral position of the control valve of the boom linkage 10 and a neutral position of the control valve of the bucket linkage 11, and then returns to the tank through an oil return port T3.
The multi-way valve of the miniature excavator in the embodiment is provided with an auxiliary first joint 6 and an auxiliary second joint 4, and auxiliary tools attached to the excavator are supplied with oil through an external oil way of an external joint valve. The auxiliary first joint 6 is located on the second control loop and the third control loop at the same time, oil is supplied through the second main pump and the third main pump, and the auxiliary second joint 4 is located on the third control loop and supplied through the third main pump. When the auxiliary first connector 6 is not in action, the position is in a middle position. Hydraulic oil of the second main pump flows through a second pressure oil port P2, a control valve middle position of the right walking link and a control valve middle position of the arm link, and then returns to the oil tank from an oil return port T3 from the control valve middle position of the auxiliary first link 6. The hydraulic oil of the third main pump passes through the middle position of the control valve of the linear walking unit, the middle position of the control valve of the rotary unit and the middle position of the control valve of the dozer blade unit from a third pressure oil port P3, and then returns through the middle position of the control valve of the auxiliary unit. When the control valves of the auxiliary one-unit are in action, the control valves are reversed to be in a left position (right position), oil liquid of the second main pump and the third main pump is converged to drive the auxiliary implement execution oil cylinder corresponding to the auxiliary one-unit through an A6(B6) port, and then the oil liquid returns to the oil tank through a B6(A6) port. The control valve of the auxiliary duplex is reversed to be in a left position (right position), the oil of the third main pump passes through the middle position of the control valve of the auxiliary duplex, the execution oil cylinder is driven by the oil inlet A7(B7), and the oil of the port B7(A7) returns to the oil tank.
The auxiliary unit in practical application can be arranged on any control loop and designed according to the power of the main pump.
Referring to fig. 1 and 5, the linear traveling unit 1 is directly connected to the third pressure port P3, the control valve of the linear traveling unit is provided with a working position with a throttle, the multi-way valve is further provided with an auxiliary pressure port P3 'connected to the linear traveling unit 1 in parallel with the third pressure port P3, and the auxiliary pressure port P3' is connected to a quick-change lock control valve of the mini excavator outside the valve. In this embodiment, a throttle orifice is arranged in the middle position of the control valve of the linear traveling linkage 1, the control valve of the linear traveling linkage 1 adopts a hydraulic control reversing valve, a pilot pressure oil is provided by a hydraulic control pilot orifice Pi4 of the hydraulic control pilot orifice to push the reversing valve of the linear traveling linkage 1 to be switched to the middle position with the throttle orifice, the real line of the port P3 'connected in parallel with the port P3 assists the oil taking function by utilizing the throttling action, the specific oil path is shown by a bold dashed line in fig. 5, when the pilot pressure oil of the pilot orifice Pi4 acts, the control valve of the linear traveling linkage 1 is switched to the middle position, the hydraulic oil of the third pressure oil port P3 is throttled by the throttle orifice of the middle position, so that auxiliary pressure can be provided for the quick-change lock control valve through the port P3', and the quick-change lock control valve is an existing hydraulic control element on the.
Referring to fig. 1 and 6, the multi-way valve of the present embodiment is further provided with an idle speed detection pressure port Pp, the idle speed detection pressure port Pp forms an automatic idle speed detection circuit 100 inside the multi-way valve, the automatic idle speed detection circuit 100 connects control valves of other units except for the straight-line traveling unit inside the multi-way valve in series, and a pressure signal detection port AI communicated with the automatic idle speed detection circuit is provided on the multi-way valve, and a pressure sensor pressure sensing element is installed on the pressure signal detection port to detect hydraulic oil pressure in the automatic idle speed detection circuit, and the pressure signal is connected to an engine rotation speed control module in a feedback manner. As shown by the bold dashed line in fig. 6, the automatic idle detection circuit 100 in this embodiment sequentially passes through the control valve of the left travel link 9, the control valve of the boom link 10, the control valve of the bucket link 11, the control valve of the right travel link 8, the control valve of the arm link 7, the control valve of the auxiliary link 6, the control valve of the boom deflection link 5, the control valve of the auxiliary link 4, the control valve of the dozer blade link 3, and the control valve of the slewing link 2, and then returns to the oil tank through the oil return port T3, and determines whether all the control valves of the links are in the neutral position by the pressure switch installed at the pressure signal detection port AI, when the excavator waits for some accessories and auxiliary devices to work, all the control valves are in the neutral position, the excavator enters into the automatic idle state, and controls the engine to be in the low idle rotation speed state, once any control valve connected with the engine operates, the pressure inside the automatic idle speed detection circuit 100 increases, and after the pressure switch of the pressure signal detection oil port AI detects a pressure signal, the engine is controlled to recover the working rotating speed, so that the effect of reducing the oil consumption is achieved.
The multi-way valve of the embodiment can ensure that the movable arm, the bucket and the bucket of the mini-excavator can independently act and can also realize compound action by matching with each other. The action of the working device and the rotation of the rotary table can be carried out independently and can also be carried out in a combined way, so that the productivity of the mini excavator is improved.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.
Claims (5)
1. The utility model provides a miniature excavator multiple unit valve which characterized in that: a linear walking link (1), a rotary link (2), a movable arm deflection link (5), a bucket rod link (7), a movable arm link (10), a bucket link (11) and at least one group of auxiliary links are integrated in the multi-way valve;
the multi-way valve is at least provided with a first pressure oil port, a second pressure oil port and a third pressure oil port, and the first pressure oil port, the second pressure oil port and the third pressure oil port are respectively connected with a first main pump, a second main pump and a third main pump of the excavator;
in the multi-way valve, control valves of the straight walking link (1), the rotating link (2) and the movable arm deflection link (5) are positioned on a third control loop connected with a third pressure oil port, the arm link (7) is positioned on a second control loop of a second pressure oil port, the movable arm link (10) and the bucket link (11) are positioned on a first control loop of a first pressure oil port, and a control valve of the auxiliary link is positioned on a control loop of any pressure oil port;
the straight line walking allies oneself with (1) is equipped with the work position of taking the choke, still be equipped with on the multiple unit valve with the third pressure hydraulic fluid port parallel connection to the auxiliary pressure hydraulic fluid port of straight line walking allies oneself with (1), the quick change lock control valve of miniature excavator is connected to the auxiliary pressure hydraulic fluid port outside the valve.
2. The multi-way valve of the mini-excavator according to claim 1, wherein: the control valve of the dozer blade assembly (3) is located on a first control loop connected with the first pressure oil port.
3. The multi-way valve of the mini-excavator according to claim 1, wherein: the excavator chassis steering control device is characterized in that a left walking link (9) and a right walking link (8) for controlling the excavator chassis to steer are further integrated, and control valves of the left walking link (9) and the right walking link (8) are respectively located on the first control loop and the second control loop.
4. The multiple-way valve of the mini-excavator according to any one of claims 1 to 3, wherein: the multi-way valve is further provided with an idle speed detection pressure oil port, the idle speed detection pressure oil port forms an automatic idle speed detection loop inside the multi-way valve, the automatic idle speed detection loop enables the middle positions of the control valves of other links except the linear walking link inside the multi-way valve to be communicated in series, a pressure signal detection oil port communicated with the automatic idle speed detection loop is arranged on the multi-way valve, and the pressure signal is connected to the engine rotating speed control module in a feedback mode.
5. The multiple-way valve of the mini-excavator according to claim 4, wherein: and the pressure signal detection oil port is provided with a pressure sensing element, and the pressure sensing element is in feedback connection with the engine rotating speed control module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020051014.7U CN211778290U (en) | 2020-01-10 | 2020-01-10 | Multi-way valve of miniature excavator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020051014.7U CN211778290U (en) | 2020-01-10 | 2020-01-10 | Multi-way valve of miniature excavator |
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| CN211778290U true CN211778290U (en) | 2020-10-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182771A (en) * | 2021-12-09 | 2022-03-15 | 中联重科土方机械有限公司 | Control system for excavator blade and control method for excavator blade |
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2020
- 2020-01-10 CN CN202020051014.7U patent/CN211778290U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182771A (en) * | 2021-12-09 | 2022-03-15 | 中联重科土方机械有限公司 | Control system for excavator blade and control method for excavator blade |
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