CN109249987A - A kind of automatic changeover - Google Patents
A kind of automatic changeover Download PDFInfo
- Publication number
- CN109249987A CN109249987A CN201811490731.3A CN201811490731A CN109249987A CN 109249987 A CN109249987 A CN 109249987A CN 201811490731 A CN201811490731 A CN 201811490731A CN 109249987 A CN109249987 A CN 109249987A
- Authority
- CN
- China
- Prior art keywords
- oil
- oil outlet
- pump group
- motor pump
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/062—Details, component parts
- B62D5/064—Pump driven independently from vehicle engine, e.g. electric driven pump
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/065—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
- B62D6/001—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits the torque NOT being among the input parameters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The present invention provides a kind of automatic changeovers, including angular displacement sensor 1, controller 2, reversal valve 3 and first motor pump group 4, controller 2 is electrically connected with angular displacement sensor 1, reversal valve 3, reversal valve 3 includes the first oil inlet 31, the first oil outlet 32, the second oil outlet 33 and control port 34, controller 2 is connected with control port 34, and the first oil outlet 32, the second oil outlet 33 are communicated with the oil inlet 41 of first motor pump group 4 and oil return opening 42 respectively；The present invention is cooperated by angular displacement sensor 1, controller 2 and reversal valve 3, is judged direction of travel and is converted automatically, and structure is simple, easy to operate, low in cost.
Description
Technical field
The present invention relates to technical field of engineering machinery more particularly to a kind of automatic changeovers.
Background technique
Crawler hypraulic excavator divides two parts of getting on the bus and get off, and gets on the bus and lower frame part opposed rotatable, centre installation
There are revolving platform, pivoting support and rotary motor, pipeline of getting off is realized by the swing mechanism being mounted on revolving platform to be excavated
Pipeline is unimpeded and do not interfere when machine turns round, at present crawler hypraulic excavator when walking general provision driven wheel in front
For positive direction of walking.But mostly relevant revolution identifying system is not installed on existing excavator, so when walking to direction
It does not distinguish, when walking, left side running motor and the right walking horse is controlled by the left threading valve and right threading valve of excavator
The walking reached.The running motor of left threading valve control is left side running motor, and the motor of right threading valve control is the right walking horse
It reaches.When walking, forward, excavator travels forward the left and right foot valve of manipulation excavator walking；It operates foot valve backward, digs
Pick machine travels backward, but getting on the bus after revolution is more than 90 degree when excavator, and the running motor of left threading valve control becomes the right
The motor of running motor, the control of right threading valve becomes left side running motor；Simultaneously as lacking exchange system, excavator is manipulated
Foot valve forward, excavator becomes to travel backward；Operate foot valve backward, excavator becomes to travel forward, in crawler belt liquid
When pressing excavator operation, driver needs constantly to distinguish direction of travel, in order to avoid malfunction, and in daily walking sideslip troubleshooting
When, determine also to need to exchange left and right running motor or oil inlet sebific duct when motor failure, operation is comparatively laborious, influences operating efficiency.
Summary of the invention
To overcome following problems existing in the prior art, due to lacking exchange system, driver needs constantly to distinguish walking
Direction is determined also to need when motor failure to exchange left and right rows and galloped along on horseback in order to avoid malfunction, and in daily walking sideslip troubleshooting
It reaches or oil inlet sebific duct, operation is comparatively laborious.The present invention provides a kind of automatic changeovers, which is characterized in that including turn-around machine
Structure, angular displacement sensor, controller, reversal valve, first motor pump group and the second motor pump group, the swing mechanism includes can phase
The upper and lower part mutually rotated, the angular displacement sensor are set to the top of the swing mechanism, the controller and the angle
Displacement sensor is connected, and the reversal valve includes the first oil inlet, the first oil outlet, the second oil outlet and control port, described
Control port control first oil inlet respectively with first oil outlet, the connection of the second oil outlet, disconnection or disconnection, even
Logical, the controller is connected with the control port, and first motor pump group includes oil inlet and oil return opening, second electric-motor pump
Group includes fuel inlet fitting and back leakage connection, first oil outlet, the second oil outlet respectively with the first motor pump group into
Hydraulic fluid port and oil return opening communicate, and the oil inlet for leading to first motor pump group oil inlet is commutated to the by the control of the control port
Two motor back leakage connection commutates the oil inlet for leading to the second motor pump group fuel inlet fitting to first motor pump group oil return opening, accordingly
Oil return line also automatic reverse, thus realize first motor pump group, the operation of the second motor pump group advance, retreat direction of travel
Commutation completely.
It on this basis, further include pioneer pump and solenoid electric valve, the controller is connect with the solenoid electric valve, institute
It states pioneer pump and is connect by the solenoid electric valve with the control port of the reversal valve.
On this basis, the reversal valve is hydraulicdirectional control valve.
On this basis, the reversal valve further includes the second oil inlet, third oil outlet and the 4th oil outlet, the third
Oil outlet, the 4th oil outlet are communicated with the fuel inlet fitting of the second motor pump group and back leakage connection respectively, the control port
First oil inlet is controlled to be connected to the first oil outlet, the second oil inlet with third oil outlet or the first oil inlet and
Four oil outlets, the second oil inlet are connected to the second oil outlet.
On this basis, the reversal valve is two-position four-way valve.
Compared with prior art, the beneficial effects of the present invention are:
The present apparatus is cooperated using swing mechanism and angular displacement sensor, automatic identification direction, and certainly by controller and reversal valve
Move to, it is automatic convenient, prevent personnel judge caused by maloperation；It is low in cost, securely and reliably；There is revolution system to other
The equipment of system is equally applicable；And the motor that judgement can be facilitated to break down improves troubleshooting efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Wherein, 1, angular displacement sensor, 2, controller, 3, reversal valve, the 31, first oil inlet, the 32, first oil outlet, 33, second
Oil outlet, 34, control port, the 35, second oil inlet, 36, third oil outlet, the 37, the 4th oil outlet, 4, first motor pump group,
41, oil inlet, 42, oil return opening, 5, pioneer pump, 6, solenoid electric valve, the 7, second motor pump group, 71, fuel inlet fitting, 72, oil return
Connector.
Specific embodiment
Below in conjunction with drawings and examples, the present invention will be described in further detail.It should be appreciated that described herein
Specific examples are only used to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, the present invention schematically illustrates a kind of automatic changeover, including swing mechanism (does not show in figure
Out), angular displacement sensor 1, controller 2, reversal valve 3 and first motor pump group 4, swing mechanism include the top that can mutually rotate
And top, angular displacement sensor 1 are set to the top of swing mechanism, for measuring the angle of swing mechanism rotation, controller 2 and angle
Displacement sensor 1 is connected, and the angle-data of measurement is transferred to controller 2 by angular displacement sensor 1, reversal valve 3 include first into
Hydraulic fluid port 31, the first oil outlet 32, the second oil outlet 33 and control port 34.Control port 34 control the first oil inlet 31 respectively with
Connection, disconnection or disconnection, the connection of first oil outlet 32, the second oil outlet 33.Controller 2 is connected with control port 34, control
Device 2 can control the on-off of the hydraulic fluid port of reversal valve 3 by control control port 34.First motor pump group 4 includes oil inlet 41 and returns
Hydraulic fluid port 42, the first oil outlet 32, the second oil outlet 33 are communicated with the oil inlet 41 of first motor pump group 4 and oil return opening 42 respectively；
The present invention controls reversal valve 3 by the data that setting angular displacement sensor 1 detects, so that the conversion of direction of travel is carried out automatically,
The embodiment of the present invention simple structure is easy, low in cost；In an embodiment of the present invention, reversal valve is preferably hydraulic commutation
Valve.Certainly, the device of oil circuit handoff functionality can also be can be realized for other, the present embodiment to this with no restriction；Institute as shown in figure 1
Show, further includes pioneer pump 5 and solenoid electric valve 6 in an embodiment of the present invention.Controller 2 is connect with solenoid electric valve 6, first
Pump 5 is led to connect by solenoid electric valve 6 with the control port 34 of hydraulicdirectional control valve.It is logical that solenoid electric valve 6 is controlled by controller 2
Break to which control port 34 further includes as shown in fig. 1 the second motor pump group 7, the second motor in an embodiment of the present invention
Pump group 7 includes fuel inlet fitting 71 and back leakage connection 72.Reversal valve 3 further includes the second oil inlet 35, third oil outlet 36 and the 4th
Oil outlet 37.Third oil outlet 36, the 4th oil outlet 37 respectively with the fuel inlet fitting 71 and back leakage connection 72 of the second motor pump group 7
It communicates.Control port 34 controls the first oil inlet 31 and is connected to the first oil outlet 32, the second oil inlet 35 with third oil outlet 36,
Or first oil inlet 31 be connected to the 4th oil outlet 37, the second oil inlet 35 with the second oil outlet 33；Pass through control port 34
Control the oil inlet that lead to 4 oil inlet 41 of first motor pump group be commutated to 7 delivery connection 72 of the second motor pump group, the will be led to
Oil inlet commutation 4 oil outlet 42 of first motor pump group of two motor pump groups, 7 fuel inlet fitting 71, the also automatic reverse of corresponding oil return line,
To realize the advance of first motor pump group 4, the operation of the second motor pump group 7, retreat the complete commutation of direction of travel；It can be by angle position
Displacement sensor 1 is installed on the top of excavator, and the position when top of definition mining machine is in direction of advance is 0 °, is then worked as
When angular displacement sensor 1 measures the angle of revolution on the top of excavator between -90 ° ~ -180 ° or+90 ° ~+180 °, controller 2
Instruction is issued by control program, opens solenoid electric valve 6, control reversal valve 3 commutates.And when angle of revolution between -90 ° ~+
At 90 °, controller 2 issues instruction by control program, closes solenoid electric valve 6, and 3 return of reversal valve, oil circuit is back to normal, from
And the direction for guaranteeing that motor advances, direction of retreat and operating stick control is fixed forever.
In an embodiment of the present invention, reversal valve 3 is preferably two-position four-way valve.In addition, reversal valve 3 can also be by main valve
Commutation channel is opened up in inside again, by control pilot control oil circuit flow direction, opens to control the commutation of control port 34, thus
Control walking commutation.
The preferred embodiment of the present invention has shown and described in above description, as previously described, it should be understood that the present invention is not office
Be limited to form disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations, modification and
Environment, and can be changed within that scope of the inventive concept describe herein by the above teachings or related fields of technology or knowledge
It is dynamic.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be appended by the present invention
In scope of protection of the claims.
Claims (5)
1. a kind of automatic changeover, which is characterized in that including swing mechanism, angular displacement sensor (1), controller (2), commutation
Valve (3), first motor pump group (4) and the second motor pump group (7), the swing mechanism include the top that can mutually rotate and under
Portion, the angular displacement sensor (1) are set to the top of the swing mechanism, the controller (2) and the angular displacement sensor
(1) it is connected, the reversal valve (3) includes the first oil inlet (31), the first oil outlet (32), the second oil outlet (33) and control oil
Mouth (34), the control port (34) control first oil inlet (31) and go out respectively with first oil outlet (32), second
Connection, disconnection or disconnection, the connection of hydraulic fluid port (33), the controller (2) are connected with the control port (34), first motor pump
Group (4) includes oil inlet (41) and oil return opening (42), and the second motor pump group (7) includes fuel inlet fitting (71) and back leakage connection
(72), first oil outlet (32), the second oil outlet (33) respectively with the oil inlet (41) of the first motor pump group (4) and
Oil return opening (42) communicates, by the control of the control port (34) will lead to first motor pump group (4) oil inlet (41) into
Oil commutation to the second motor (7) back leakage connection (72), by the oil inlet for leading to the second motor pump group (7) fuel inlet fitting (71) commutate to
First motor pump group (4) oil return opening (42), corresponding oil return line also automatic reverse, to realize first motor pump group (4), second
The advance of motor pump group (7) operation, the complete commutation for retreating direction of travel.
2. automatic changeover as described in claim 1, which is characterized in that further include pioneer pump (5) and solenoid electric valve
(6), the controller (2) connect with the solenoid electric valve (6), the pioneer pump (5) by the solenoid electric valve (6) with
The control port (34) of the reversal valve (3) connects.
3. automatic changeover as claimed in claim 2, which is characterized in that the reversal valve (3) is hydraulicdirectional control valve.
4. automatic changeover as claimed in claim 3, which is characterized in that the reversal valve (3) further includes the second oil inlet
(35), third oil outlet (36) and the 4th oil outlet (37), the third oil outlet (36), the 4th oil outlet (37) respectively with institute
The fuel inlet fitting (71) and back leakage connection (72) for stating the second motor pump group (7) communicate, the control port (34) control described the
One oil inlet (31) with the first oil outlet (32), the second oil inlet (35) is connected to third oil outlet (36) or the first oil inlet
Mouth (31) is connected to the 4th oil outlet (37), the second oil inlet (35) with the second oil outlet (33).
5. automatic changeover as claimed in claim 4, which is characterized in that the reversal valve (3) is two-position four-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811490731.3A CN109249987A (en) | 2018-12-07 | 2018-12-07 | A kind of automatic changeover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811490731.3A CN109249987A (en) | 2018-12-07 | 2018-12-07 | A kind of automatic changeover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109249987A true CN109249987A (en) | 2019-01-22 |
Family
ID=65042485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811490731.3A Pending CN109249987A (en) | 2018-12-07 | 2018-12-07 | A kind of automatic changeover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109249987A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111267950A (en) * | 2020-03-16 | 2020-06-12 | 中联重机股份有限公司 | Motor vehicle and steering and walking control system thereof |
-
2018
- 2018-12-07 CN CN201811490731.3A patent/CN109249987A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111267950A (en) * | 2020-03-16 | 2020-06-12 | 中联重机股份有限公司 | Motor vehicle and steering and walking control system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190122 |