CN110962522A - Lifting wheel locking device for trench crossing of unmanned wheeled vehicle - Google Patents
Lifting wheel locking device for trench crossing of unmanned wheeled vehicle Download PDFInfo
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- CN110962522A CN110962522A CN201911147808.1A CN201911147808A CN110962522A CN 110962522 A CN110962522 A CN 110962522A CN 201911147808 A CN201911147808 A CN 201911147808A CN 110962522 A CN110962522 A CN 110962522A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/056—Regulating distributors or valves for hydropneumatic systems
- B60G17/0565—Height adjusting valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/016—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
- B60G17/0165—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input to an external condition, e.g. rough road surface, side wind
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/048—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics with the regulating means inside the fluid springs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/20—Spring action or springs
- B60G2500/22—Spring constant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/20—Stationary vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/90—System Controller type
- B60G2800/91—Suspension Control
- B60G2800/914—Height Control System
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention belongs to the technical field of vehicle high-pass, and particularly relates to a lifting wheel locking device for a trench crossing of an unmanned wheeled vehicle, which comprises: the lifting wheel locking valve block, the pipeline accessory and the oil-gas spring; the lifting wheel locking device can effectively adjust the height of the vehicle posture through oil charging and discharging of the hydro-pneumatic spring annular cavity, and can lock pressure oil pre-charged into the annular cavity in a locking mode, so that wheels are prevented from pulling the piston rod downwards to fall into a trench when the trench is spanned. The lifting wheel locking device is suitable for being popularized and applied to wheeled vehicles based on hydro-pneumatic spring suspension types, in particular to electric wheeled vehicles with heavy unsprung mass.
Description
Technical Field
The invention belongs to the technical field of vehicle high-pass, and particularly relates to a lifting wheel locking device for an unmanned wheeled vehicle for trench crossing.
Background
The unmanned wheeled vehicle is based on a single longitudinal arm or double transverse arms suspension scheme of a hydro-pneumatic spring, and particularly relates to an unmanned electric wheeled vehicle driven by a hub motor in a distributed mode. When the vehicle is in a trench crossing state, the unsprung mass is heavy, so that the heavy unsprung mass can sequentially pull the longitudinal arm or the transverse arm and the main piston rod downwards to fall into a tunnel at the moment that a certain wheel of the vehicle is suspended, as shown in fig. 1(b), the capability of the whole vehicle for crossing the trench is weakened, and the tactical index of the whole vehicle is influenced. Meanwhile, frequent downward pulling of the main piston easily causes fatigue damage to internal components of the hydro-pneumatic spring, and affects the working reliability and the service life of the hydro-pneumatic spring.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to provide a simple and effective lifting wheel locking device for a wheel-free vehicle to cross a trench, and a feasible scheme is provided for improving the passing and crossing capacity of the vehicle.
(II) technical scheme
In order to solve the above technical problem, the present invention provides a lifting wheel locking device for an unmanned wheeled vehicle for crossing a trench, the device comprising: the lifting wheel locking valve block 1, the pipeline accessory 2 and the hydro-pneumatic spring 3;
the lifting wheel locking valve block 1 is used for pre-charging pressure oil to the annular cavity 301 of the hydro-pneumatic spring 3 and locking the pre-charged pressure oil in the annular cavity 301;
the pipeline accessory 2 is used for communicating the lifting wheel locking valve block 1 with an annular cavity 301 of the hydro-pneumatic spring 3;
the hydro-pneumatic spring 3 is a vehicle suspension actuating element, and lifting and lowering of the wheels are achieved through oil charging and discharging of the annular cavity 301.
Wherein, the lifting wheel locking valve block 1 comprises: an overflow valve 101 and a two-position two-way electromagnetic valve 102;
the overflow valve 101 is used for setting a safety pressure to prevent the annular cavity 301 from being pre-charged with excessive pressure oil;
the two-position two-way electromagnetic valve 102 is used for switching on and off of an oil path, and the two-position two-way electromagnetic valve 102 is a normally closed valve in a normal state and is used for blocking pressure oil in the annular cavity 301.
The locking device connects the lifting wheel locking valve block 1 and the annular cavity 301 of the hydro-pneumatic spring 3 in series, pre-charging oil and locking functions of the annular cavity 301 are achieved through on-off reversing of the two-position two-way electromagnetic reversing valve 102 of the lifting wheel locking valve block 1, vehicle postures are reduced, and stability of trench crossing is effectively improved.
The locking device effectively improves the capacity of the whole vehicle for passing through the trench on the premise of meeting the normal vehicle posture adjusting function of the whole vehicle.
The locking device is used for pre-charging pressure oil into the hydro-pneumatic spring annular cavity, pushing the main piston to move to lift the wheel and reduce the vehicle posture;
meanwhile, the pre-charged pressure oil can be locked in the annular cavity, so that wheels are prevented from downwards pulling the piston rod to fall into the trench when the trench is crossed, and the posture stability of the whole vehicle when the trench is crossed is ensured.
The locking device is applied to the scheme that the suspension type is a hydro-pneumatic spring scheme and comprises a hydro-pneumatic suspension scheme based on a double cross arm and a hydro-pneumatic suspension scheme based on a single longitudinal arm.
Before the trench is crossed, oil is filled into an annular cavity 301 of the hydro-pneumatic spring 3 through a lifting wheel locking valve block 1 and a pipeline accessory 2 in sequence, all main pistons are pushed into a cylinder barrel, the annular cavity is filled with pressure oil, and the lowest vehicle posture is realized; preventing the piston rod from being pulled down to fall into the trench due to the unsprung mass being too heavy.
Wherein, locking device is based on oil gas spring formula single trailing arm hangs and carries a round locking device, and its working process is:
when a vehicle is ready to cross a trench, pre-charging pressure oil to the hydro-pneumatic spring annular cavity 301 in advance, reducing the posture of the vehicle to the minimum, electrifying and opening the two-position two-way electromagnetic directional valve 102 of the lifting wheel locking valve block 1, starting a hydraulic oil source, and pre-charging the pressure oil to the hydro-pneumatic spring annular cavity 301 sequentially through the lifting wheel locking valve block 1 and the pipeline accessory 2, wherein the pressure oil pushes the piston rod 5 to move, and the piston rod 5 pulls the single longitudinal arm 4 and the tire 6 to move together, so that the height of the whole vehicle is reduced;
meanwhile, along with the movement of the piston rod 5, the pressure oil in the original spring large cavity 302 is extruded to the air chamber, when the piston rod 5 retracts into the bottom of the cylinder barrel, the two-position two-way electromagnetic directional valve 102 is closed and locked by cutting off the power supply to pre-charge the pressure oil in the annular cavity 301, the annular cavity 301 is filled with hydraulic oil, and the function of passing through and crossing the trench of the vehicle is realized through the lifting wheel locking device.
Wherein, locking device is based on oil gas spring formula double wishbone lifting wheel locking device, and its course of operation is:
when a vehicle is ready to cross a trench, the hydro-pneumatic spring annular cavity 301 is pre-charged with pressure oil in advance, the posture of the vehicle is reduced to the lowest, and the lifting wheel is in a state of locking the valve block 1; the two-position two-way electromagnetic directional valve 102 on the lifting wheel locking valve block 1 is electrified and opened, a hydraulic oil source is started to pre-charge pressure oil to the hydro-pneumatic spring annular cavity 301 through the lifting wheel locking valve block 1 and the pipeline accessory 2 in sequence, the pressure oil can push the piston rod 5 to move, and the piston rod 5 can pull the upper cross arm 7 and the lower cross arm 7 to move together with the tire 6, so that the height of the whole vehicle is reduced;
meanwhile, along with the movement of the piston rod 5, the pressure oil in the original spring large cavity 302 is extruded to the air chamber, when the piston rod 5 retracts into the bottom of the cylinder barrel, the two-position two-way electromagnetic directional valve 102 is closed to lock the pressure oil pre-charged in the annular cavity 301 when the power is off, and the annular cavity 301 is filled with hydraulic oil; the lifting wheel locking device realizes the function of passing the vehicle through the trench.
(III) advantageous effects
Compared with the prior art, the invention provides the lifting wheel locking device for the trench crossing of the unmanned wheeled vehicle, which connects a lifting wheel locking valve block, a pipeline accessory and the like in series in an oil-gas spring annular cavity. The device can pre-charge pressure oil to the hydro-pneumatic spring annular cavity, and lock the charged pressure oil in the annular cavity, so that the height of the vehicle can be adjusted. When the wheel type vehicle strides the trench, the pressure oil locked in the annular cavity effectively inhibits the downward movement trend of the unsprung mass, so that the wheels are prevented from falling into the trench, and the rigidity and the stability of the wheel type vehicle striding the trench are effectively improved. The lifting wheel locking device is suitable for wheeled vehicles with single longitudinal arm or double transverse arms suspension scheme based on hydro-pneumatic springs, in particular to electric wheeled vehicles with heavy unsprung mass
Drawings
FIGS. 1(a) to 1(c) are schematic views illustrating the operation of a hydro-pneumatic spring-based lifting wheel locking device; wherein, fig. 1(a) is a normal driving hydro-pneumatic spring suspension state; FIG. 1(b) shows a state where a wheel falls down to the suspension of an oil-gas spring in a tunnel; fig. 1(c) shows the suspension state of the hydro-pneumatic spring after the lifting wheel locking device is acted and intervened.
FIG. 2 is a schematic oil filling diagram of a single trailing arm suspension lifting wheel locking device based on an oil-gas spring type;
FIG. 3 is a schematic view of a trench-crossing state of a single trailing arm suspension lifting wheel locking device based on an oil-gas spring type;
FIG. 4 is a schematic diagram of oil filling of a double-cross-arm lifting wheel locking device based on an oil-gas spring type;
FIG. 5 is a schematic diagram of a trench-crossing state of the lifting wheel locking device based on oil-gas springs with double cross arms;
in the figure:
1: lifting wheel locking valve block, 101: relief valve, 102: two-position two-way electromagnetic directional valve, 2: pipeline accessory, 3: hydro-pneumatic spring, 4: single trailing arm, 5: piston rod, 301: annular cavity, 302: spring large cavity, 6: tire, 7: the cross arm.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
Aiming at the problems in the prior art, the invention provides a lifting wheel locking device for an unmanned wheeled vehicle for crossing a trench, which connects a lifting wheel locking valve block, a pipeline accessory and the like in series in an oil-gas spring annular cavity. When the whole vehicle crosses the ditch, the two-position two-way electromagnetic valve on the lifting wheel locking valve block is electrified, pressure oil output by the power oil source enters the hydro-pneumatic spring annular cavity through the lifting wheel locking valve block, the main piston rod is pushed to the bottom of the cylinder barrel to reduce the posture of the vehicle, and meanwhile, the pressure oil in the annular cavity is locked in a closed mode, as shown in fig. 1(c), after the pressure oil in the annular cavity is locked in a closed mode, each wheel does not pull the piston rod downwards to fall into the tunnel due to self weight when the whole vehicle crosses the ditch, and therefore stability of the whole vehicle when the whole vehicle crosses the ditch is guaranteed.
The lift wheel locking device for the trench crossing of the unmanned wheeled vehicle comprises: the lifting wheel locking valve block 1, the pipeline accessory 2 and the hydro-pneumatic spring 3;
the lifting wheel locking valve block 1 is used for pre-charging pressure oil to the annular cavity 301 of the hydro-pneumatic spring 3 and locking the pre-charged pressure oil in the annular cavity 301;
the pipeline accessory 2 is used for communicating the lifting wheel locking valve block 1 with an annular cavity 301 of the hydro-pneumatic spring 3;
the hydro-pneumatic spring 3 is a vehicle suspension actuating element, and lifting and lowering of the wheels are achieved through oil charging and discharging of the annular cavity 301.
Wherein, the lifting wheel locking valve block 1 comprises: an overflow valve 101 and a two-position two-way electromagnetic valve 102;
the overflow valve 101 is used for setting a safety pressure to prevent the annular cavity 301 from being pre-charged with excessive pressure oil;
the two-position two-way electromagnetic valve 102 is used for switching on and off of an oil path, and the two-position two-way electromagnetic valve 102 is a normally closed valve in a normal state and is used for blocking pressure oil in the annular cavity 301.
The locking device connects the lifting wheel locking valve block 1 and the annular cavity 301 of the hydro-pneumatic spring 3 in series, pre-charging oil and locking functions of the annular cavity 301 are achieved through on-off reversing of the two-position two-way electromagnetic reversing valve 102 of the lifting wheel locking valve block 1, vehicle postures are reduced, and stability of trench crossing is effectively improved.
The locking device effectively improves the capacity of the whole vehicle for passing through the trench on the premise of meeting the normal vehicle posture adjusting function of the whole vehicle.
The locking device is used for pre-charging pressure oil into the hydro-pneumatic spring annular cavity, pushing the main piston to move to lift the wheel and reduce the vehicle posture;
meanwhile, the pre-charged pressure oil can be locked in the annular cavity, so that wheels are prevented from downwards pulling the piston rod to fall into the trench when the trench is crossed, and the posture stability of the whole vehicle when the trench is crossed is ensured.
The locking device is applied to the scheme that the suspension type is a hydro-pneumatic spring scheme and comprises a hydro-pneumatic suspension scheme based on a double cross arm and a hydro-pneumatic suspension scheme based on a single longitudinal arm.
Before the trench is crossed, oil is filled into an annular cavity 301 of the hydro-pneumatic spring 3 through a lifting wheel locking valve block 1 and a pipeline accessory 2 in sequence, all main pistons are pushed into a cylinder barrel, the annular cavity is filled with pressure oil, and the lowest vehicle posture is realized; preventing the piston rod from being pulled down to fall into the trench due to the unsprung mass being too heavy.
Wherein, locking device is based on oil gas spring formula single trailing arm hangs and carries a round locking device, and its working process is:
when the vehicle is ready to cross the trench, the hydro-pneumatic spring annular cavity 301 is pre-charged with pressurized oil in advance to reduce the posture of the vehicle to the minimum, and the state of the wheel lifting locking valve block 1 is shown in fig. 2. The two-position two-way electromagnetic directional valve 102 of the lifting wheel locking valve block 1 is electrified and opened, a hydraulic oil source is started to pre-charge pressure oil to the hydro-pneumatic spring annular cavity 301 through the lifting wheel locking valve block 1 and the pipeline accessory 2 in sequence, the pressure oil pushes the piston rod 5 to move, and the piston rod 5 pulls the single longitudinal arm 4 and the tire 6 to move together, so that the height of the whole vehicle is reduced;
meanwhile, along with the movement of the piston rod 5, the pressure oil in the original spring large cavity 302 is extruded to the air chamber, when the piston rod 5 retracts into the bottom of the cylinder barrel, the two-position two-way electromagnetic directional valve 102 is closed and locked by cutting off the power supply to pre-charge the pressure oil in the annular cavity 301, the state of the annular cavity 301 filled with the hydraulic oil is shown in fig. 3, and the function of passing the high-pass trench of the vehicle is realized through the lifting wheel locking device.
Wherein, locking device is based on oil gas spring formula double wishbone lifting wheel locking device, and its course of operation is:
the specific working principle of the hydro-pneumatic spring based double-cross arm lifting wheel locking device is the same as that of a hydro-pneumatic spring based single-longitudinal-arm suspension lifting wheel locking device.
When a vehicle is ready to cross a trench, the hydro-pneumatic spring annular cavity 301 is pre-charged with pressure oil in advance, the posture of the vehicle is reduced to the minimum, and the state of the lifting wheel locking valve block 1 is shown in fig. 4; the two-position two-way electromagnetic directional valve 102 on the lifting wheel locking valve block 1 is electrified and opened, a hydraulic oil source is started to pre-charge pressure oil to the hydro-pneumatic spring annular cavity 301 through the lifting wheel locking valve block 1 and the pipeline accessory 2 in sequence, the pressure oil can push the piston rod 5 to move, and the piston rod 5 can pull the upper cross arm 7 and the lower cross arm 7 to move together with the tire 6, so that the height of the whole vehicle is reduced;
meanwhile, along with the movement of the piston rod 5, the pressure oil in the original spring large cavity 302 is extruded to the air chamber, when the piston rod 5 retracts to the bottom of the cylinder barrel, the two-position two-way electromagnetic directional valve 102 is closed to lock the pressure oil pre-charged in the annular cavity 301, and the state of the annular cavity 301 filled with the hydraulic oil is shown in fig. 5; the lifting wheel locking device realizes the function of passing the vehicle through the trench.
Example 1
This embodiment explains the lifting wheel locking device based on two different suspension schemes of hydro-pneumatic spring respectively:
a. single longitudinal arm suspension lifting wheel locking device based on hydro-pneumatic spring
When the vehicle is ready to cross the trench, the hydro-pneumatic spring annular cavity 301 needs to be pre-charged with pressurized oil in advance to reduce the posture of the vehicle to the minimum, and the state of the lift wheel locking valve block 1 is shown in fig. 2. The two-position two-way electromagnetic directional valve 102 on the lifting wheel locking valve block 1 is electrified and opened, a hydraulic oil source is started to pre-charge pressure oil to the hydro-pneumatic spring annular cavity 301 sequentially through the lifting wheel locking valve block 1 and the pipeline accessory 2, the pressure oil can push the piston rod 5 to move, and the piston rod 5 can pull the single longitudinal arm 4 and the tire 6 to move together, so that the height of the whole vehicle is reduced. Meanwhile, along with the movement of the piston rod 5, the pressure oil in the original spring large cavity 302 is squeezed to the air chamber, when the piston rod 5 retracts to the bottom of the cylinder barrel, the two-position two-way electromagnetic directional valve 102 is closed to lock the pressure oil pre-charged in the annular cavity 301, and the state that the annular cavity 301 is filled with the hydraulic oil is shown in fig. 3. The lifting wheel locking device realizes the function of passing the vehicle through the trench.
b. Oil-gas spring-based double-cross-arm lifting wheel locking device
The specific working principle of the hydro-pneumatic spring based double-cross arm lifting wheel locking device is the same as that of a hydro-pneumatic spring based single-longitudinal-arm suspension lifting wheel locking device.
When the vehicle is ready to cross the trench, the hydro-pneumatic spring annular cavity 301 needs to be pre-charged with pressurized oil in advance to reduce the posture of the vehicle to the minimum, and the state of the wheel lifting locking valve block 1 is shown in fig. 3. The two-position two-way electromagnetic directional valve 102 on the lifting wheel locking valve block 1 is electrified and opened, a hydraulic oil source is started to pre-charge pressure oil to the hydro-pneumatic spring annular cavity 301 through the lifting wheel locking valve block 1 and the pipeline accessory 2 in sequence, the pressure oil can push the piston rod 5 to move, the piston rod 5 can pull the upper cross arm 7 and the lower cross arm 7 to move together with the tire 6, and therefore the height of the whole vehicle is reduced. Meanwhile, along with the movement of the piston rod 5, the pressure oil in the original spring large cavity 302 is squeezed to the air chamber, when the piston rod 5 retracts to the bottom of the cylinder barrel, the two-position two-way electromagnetic directional valve 102 is closed to lock the pressure oil pre-charged in the annular cavity 301, and the state that the annular cavity 301 is filled with the hydraulic oil is shown in fig. 4. The lifting wheel locking device realizes the function of passing the vehicle through the trench.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A lift wheel locking device for a trench crossing of an unmanned wheeled vehicle, the device comprising: the lifting wheel locking valve block (1), the pipeline accessory (2) and the oil-gas spring (3);
the lifting wheel locking valve block (1) is used for pre-charging pressure oil to an annular cavity (301) of the hydro-pneumatic spring (3) and locking the pre-charged pressure oil in the annular cavity (301);
the pipeline accessory (2) is used for communicating the lifting wheel locking valve block (1) with an annular cavity (301) of the oil-gas spring (3);
the hydro-pneumatic spring (3) is a vehicle suspension actuating element, and lifting and lowering of the wheels are achieved through oil charging and discharging of the annular cavity (301).
2. The lift-off closure for a trench for an unmanned wheeled vehicle of claim 1, wherein said lift-off closure valve block (1) comprises: an overflow valve (101) and a two-position two-way electromagnetic valve (102);
the overflow valve (101) is used for setting safety pressure and preventing the annular cavity (301) from being overhigh in pre-charging pressure oil;
the two-position two-way electromagnetic valve (102) is used for switching on and off of an oil path, and the two-position two-way electromagnetic valve (102) is a normally closed valve in a normal state and is used for locking pressure oil in the annular cavity (301).
3. The lift wheel locking device for the trench crossing of the unmanned wheeled vehicle as claimed in claim 2, wherein the locking device connects the lift wheel locking valve block (1) and the annular cavity (301) of the hydro-pneumatic spring (3) in series, and the functions of pre-charging oil pressure and locking of the annular cavity (301) are realized through on-off reversing of the two-position two-way electromagnetic reversing valve (102) of the lift wheel locking valve block (1), so that the vehicle posture is reduced, and the stability of the trench crossing is effectively improved.
4. The lift wheel locking device for the trench crossing of the unmanned wheeled vehicle as claimed in claim 3, wherein the locking device effectively improves the capability of the whole vehicle to pass through the trench crossing on the premise of meeting the normal vehicle posture adjusting function of the whole vehicle.
5. The lift-off latch for a trench in an unmanned wheeled vehicle of claim 1, wherein the latch is adapted to pre-charge the hydro-pneumatic spring annular chamber with pressurized oil to urge the primary piston to move to lift the wheel and lower the attitude of the vehicle;
meanwhile, the pre-charged pressure oil can be locked in the annular cavity, so that wheels are prevented from downwards pulling the piston rod to fall into the trench when the trench is crossed, and the posture stability of the whole vehicle when the trench is crossed is ensured.
6. The lift-off latch for an unmanned wheeled vehicle for spanning a trench of claim 1 wherein said latch is applied to suspension versions of hydro-pneumatic spring solutions including a dual wishbone based hydro-pneumatic suspension solution and a single trailing arm based hydro-pneumatic suspension solution.
7. The lift wheel locking device for the trench crossing of the unmanned wheeled vehicle as claimed in claim 1, wherein before the trench crossing, the annular cavity (301) of the hydro-pneumatic spring (3) is filled with oil through the lift wheel locking valve block (1) and the pipeline accessory (2) in sequence, and the main piston is pushed into the cylinder barrel completely to ensure that the annular cavity is filled with pressure oil, so that the lowest vehicle posture is realized; preventing the piston rod from being pulled down to fall into the trench due to the unsprung mass being too heavy.
8. The lift-wheel locking device for an unmanned wheeled vehicle for crossing trenches as claimed in claim 1, wherein the locking device is a hydro-pneumatic spring based single trailing arm suspended lift-wheel locking device, and the operation process is as follows:
when a vehicle is ready to cross a trench, pre-charging pressure oil in advance to an oil-gas spring annular cavity (301), reducing the posture of the vehicle to the lowest, electrifying and opening a two-position two-way electromagnetic directional valve (102) of a lifting wheel locking valve block (1), starting a hydraulic oil source, and pre-charging the pressure oil in the oil-gas spring annular cavity (301) sequentially through the lifting wheel locking valve block (1) and a pipeline accessory (2), wherein the pressure oil pushes a piston rod (5) to move, and the piston rod (5) pulls a single longitudinal arm (4) and a tire (6) to move together, so that the height of the whole vehicle is reduced;
meanwhile, along with the movement of the piston rod (5), pressure oil in the original spring large cavity (302) is extruded to the air chamber, when the piston rod (5) retracts into the bottom of the cylinder barrel, the two-position two-way electromagnetic directional valve (102) is closed and locked by switching off the power supply to close and lock the pressure oil pre-charged in the annular cavity (301), the annular cavity (301) is filled with hydraulic oil, and the function of passing through and crossing the trench of the vehicle is realized through the lifting wheel locking device.
9. The lift-wheel locking device for an unmanned wheeled vehicle for crossing trenches as claimed in claim 1, wherein the locking device is a hydro-pneumatic spring based double wishbone lift-wheel locking device, and the operation process is as follows:
when a vehicle is ready to cross a trench, pre-charging pressure oil to the hydro-pneumatic spring annular cavity (301) in advance, and reducing the posture of the vehicle to the lowest, wherein the lift wheel is in a state of locking the valve block (1); a two-position two-way electromagnetic directional valve (102) on the lifting wheel locking valve block (1) is electrified to be opened, a hydraulic oil source is started to pre-charge pressure oil to an oil-gas spring annular cavity (301) through the lifting wheel locking valve block (1) and a pipeline accessory (2), the pressure oil can push a piston rod (5) to move, the piston rod (5) can pull an upper transverse arm (7) and a lower transverse arm (7) to move together with a tire (6), and therefore the height of the whole vehicle is reduced;
meanwhile, along with the movement of the piston rod (5), pressure oil in the original spring large cavity (302) is extruded to the air chamber, when the piston rod (5) retracts into the bottom of the cylinder barrel, the two-position two-way electromagnetic directional valve (102) is closed and locked by power failure to pre-fill the pressure oil in the annular cavity (301), and the annular cavity (301) is filled with hydraulic oil; the lifting wheel locking device realizes the function of passing the vehicle through the trench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911147808.1A CN110962522A (en) | 2019-11-21 | 2019-11-21 | Lifting wheel locking device for trench crossing of unmanned wheeled vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911147808.1A CN110962522A (en) | 2019-11-21 | 2019-11-21 | Lifting wheel locking device for trench crossing of unmanned wheeled vehicle |
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| CN110962522A true CN110962522A (en) | 2020-04-07 |
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| CN201911147808.1A Withdrawn CN110962522A (en) | 2019-11-21 | 2019-11-21 | Lifting wheel locking device for trench crossing of unmanned wheeled vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114802434A (en) * | 2022-03-31 | 2022-07-29 | 湖南三一中型起重机械有限公司 | Steering control method and device, engineering vehicle and storage medium |
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| CN102358132A (en) * | 2011-08-23 | 2012-02-22 | 中国北方车辆研究所 | Device and method for adjusting vehicle height based on hydro-pneumatic spring |
| CN202463504U (en) * | 2011-12-28 | 2012-10-03 | 长春孔辉汽车科技有限公司 | Leveling device for oil-gas hanger bracket of multi-axle vehicle |
| CN103182916A (en) * | 2011-12-28 | 2013-07-03 | 长春孔辉汽车科技有限公司 | Leveling device and method for hydro-pneumatic suspension of multi-axle vehicle |
| CN205112911U (en) * | 2015-10-13 | 2016-03-30 | 湖北航天技术研究院特种车辆技术中心 | Take aim at formula initiative suspension in advance based on oil/gas spring |
| CN107399215A (en) * | 2017-06-23 | 2017-11-28 | 北京机械设备研究所 | A kind of arrangement for adjusting height of independent oleo-pneumatic suspension |
| CN110303845A (en) * | 2019-05-31 | 2019-10-08 | 中国北方车辆研究所 | A kind of rocker arm suspension back pressure chamber carrying buffer unit |
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2019
- 2019-11-21 CN CN201911147808.1A patent/CN110962522A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358132A (en) * | 2011-08-23 | 2012-02-22 | 中国北方车辆研究所 | Device and method for adjusting vehicle height based on hydro-pneumatic spring |
| CN202463504U (en) * | 2011-12-28 | 2012-10-03 | 长春孔辉汽车科技有限公司 | Leveling device for oil-gas hanger bracket of multi-axle vehicle |
| CN103182916A (en) * | 2011-12-28 | 2013-07-03 | 长春孔辉汽车科技有限公司 | Leveling device and method for hydro-pneumatic suspension of multi-axle vehicle |
| CN205112911U (en) * | 2015-10-13 | 2016-03-30 | 湖北航天技术研究院特种车辆技术中心 | Take aim at formula initiative suspension in advance based on oil/gas spring |
| CN107399215A (en) * | 2017-06-23 | 2017-11-28 | 北京机械设备研究所 | A kind of arrangement for adjusting height of independent oleo-pneumatic suspension |
| CN110303845A (en) * | 2019-05-31 | 2019-10-08 | 中国北方车辆研究所 | A kind of rocker arm suspension back pressure chamber carrying buffer unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114802434A (en) * | 2022-03-31 | 2022-07-29 | 湖南三一中型起重机械有限公司 | Steering control method and device, engineering vehicle and storage medium |
| CN114802434B (en) * | 2022-03-31 | 2023-08-29 | 湖南三一中型起重机械有限公司 | Steering control method and device, engineering vehicle and storage medium |
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Application publication date: 20200407 |