CN210792722U - Hydro-pneumatic suspension device and engineering vehicle - Google Patents
Hydro-pneumatic suspension device and engineering vehicle Download PDFInfo
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- CN210792722U CN210792722U CN201921267988.2U CN201921267988U CN210792722U CN 210792722 U CN210792722 U CN 210792722U CN 201921267988 U CN201921267988 U CN 201921267988U CN 210792722 U CN210792722 U CN 210792722U
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Abstract
The utility model provides an oil gas linkage and engineering vehicle, oil gas linkage includes: a frame; the middle suspension cylinder is connected with the frame and comprises a first rod cavity and a first rodless cavity; the rear suspension cylinder is connected with the frame and comprises a second rod cavity and a second rodless cavity; the energy accumulator is communicated with the first rodless cavity and the second rodless cavity; wherein, the first rod cavity is communicated with the second rod cavity, and the first rodless cavity is communicated with the second rodless cavity. The utility model provides an oil gas linkage, including frame, well suspension jar, back suspension jar and energy storage ware, the first pole chamber that has of well suspension jar has the pole chamber to be linked together with the second that hangs the jar after with, and the first rodless chamber that hangs the jar in and the second rodless chamber that hangs the jar after are linked together for the flexible mutual compensation of well suspension jar and back suspension jar forms the effect of hydraulic balance beam, thereby makes the fluctuation change on wheel ability quick response road surface around the engineering vehicle.
Description
Technical Field
The utility model relates to a tipper technical field particularly, relates to an oil gas linkage and an engineering vehicle.
Background
The wide-body mining dump truck is an off-highway heavy transport vehicle, belongs to one of mining equipment, is mainly used for ore and earthwork transportation in the process of surface mining, and has the characteristics of large transportation volume, high efficiency, strong flexibility, good economy and the like. The suspension system of the wide-body vehicle inherits the plate spring structure of the heavy road truck, and the suspension system can be well adapted to the good pavement of an asphalt road, and a plurality of problems can occur in the environment of an open mine: 1. for the front suspension, because the front suspension has a direct influence on the comfort of a driver, in order to improve the buffering effect of the suspension, the rigidity of the plate spring is generally designed to be lower, namely the number of the plate springs is smaller, and the design has a better vibration damping effect but has insufficient strength; the curvature radian of the front plate spring is upward, slag is easily clamped between the plate spring and the binding surface of the plate spring, so that the surface of the plate spring is scratched, and a high stress area is formed; for the two reasons, the front plate spring is easy to break, and the failure rate is very high. 2. In order to improve the suspension load-bearing capacity of the rear leaf spring, the stiffness of the leaf spring is usually designed to be relatively high, i.e. the number of leaves of the leaf spring is relatively large, and this design has a relatively high pressure-resistant capacity but a poor damping effect. Because of the low vibration isolation rate, the road surface vibration excitation directly acts on structural members such as a frame and the like, and the fatigue life of bearing parts is reduced.
Therefore, how to design a on the bearing capacity basis of guaranteeing the after-suspension, reduce the fault rate of after-suspension, promote the vibration isolation rate of after-suspension, improve the cushioning effect of after-suspension, improve the fatigue life's of spare part hydro-pneumatic suspension device and become the problem that awaits a urgent need to solve.
SUMMERY OF THE UTILITY MODEL
The present invention aims at least solving one of the technical problems existing in the prior art or the related art.
Therefore, the first aspect of the present invention provides an oil gas suspension device.
A second aspect of the present invention is to provide an engineering vehicle.
In view of this, according to the utility model discloses an aspect, the utility model provides an oil gas suspension device, include: a frame; the middle suspension cylinder is connected with the frame and comprises a first rod cavity and a first rodless cavity; the rear suspension cylinder is connected with the frame and comprises a second rod cavity and a second rodless cavity; the energy accumulator is communicated with the first rodless cavity and the second rodless cavity; wherein, the first rod cavity is communicated with the second rod cavity, and the first rodless cavity is communicated with the second rodless cavity.
The utility model provides an oil gas linkage includes the frame, well suspension cylinder, back suspension cylinder and energy storage ware, well suspension cylinder and the equal movably of back suspension cylinder are connected with the frame, well suspension cylinder includes first pole chamber and first rodless chamber, back suspension cylinder includes that the second has pole chamber and the rodless chamber of second, the energy storage ware is linked together with first rodless chamber and the rodless chamber of second, wherein, the first pole chamber that has of well suspension cylinder is linked together with the second of back suspension cylinder has the pole chamber, the first rodless chamber of well suspension cylinder is linked together with the rodless chamber of second of back suspension cylinder, make the flexible mutual compensation of well suspension cylinder and back suspension cylinder, form the effect of hydraulic balance beam, thereby make the fluctuation change of wheel ability quick response road surface around the engineering vehicle. Furthermore, the oil-gas suspension device of the utility model is of an oil-gas separation type, hydraulic oil is stored in the middle suspension cylinder and the rear suspension cylinder, and nitrogen is stored in the air chamber of the energy accumulator; the oil and gas are separated by a piston within the accumulator. Under the condition that the oil-gas suspension device is used in an engineering vehicle, a middle suspension cylinder and a rear suspension cylinder on the same side of the engineering vehicle are communicated through a pipeline, wherein a first rod cavity is connected with a second rod cavity, a first rodless cavity is connected with a second rodless cavity, the middle suspension cylinder and the rear suspension cylinder are mutually compensated in a telescopic mode and similar to a seesaw, the effect of a mechanical balance beam is formed, six-point constraint of a frame, the middle suspension cylinder, the rear suspension cylinder and a front suspension cylinder of the engineering vehicle is reduced to four-point constraint, and the defect that the ground gripping performance of wheels of the frame is insufficient due to over-constraint is avoided.
It can be appreciated that the hydro-pneumatic suspension device of the present invention further comprises: the suspension mechanism comprises an axle connected with a middle suspension cylinder and a rear suspension cylinder, and a guide mechanism connected with the axle, namely a transverse pull rod, a longitudinal pull rod and the like.
Additionally, the utility model provides an oil gas suspension device among the above-mentioned technical scheme can also have following additional technical characteristic:
in the above technical solution, preferably, the accumulator includes: a low pressure gas chamber and a high pressure gas chamber; the low-pressure air chamber is provided with a first inflation valve and a first piston, the first piston is positioned inside the low-pressure air chamber, and the first inflation valve is positioned on the cavity wall of the low-pressure air chamber; and a second inflation valve and a second piston are arranged on the high-pressure air chamber, the second piston is positioned in the high-pressure air chamber, and the second inflation valve is positioned on the chamber wall of the high-pressure air chamber.
In the technical scheme, the energy accumulator comprises a low-pressure air chamber and a high-pressure air chamber; the low-pressure air chamber is provided with a first inflation valve and a first piston, the first piston is positioned inside the low-pressure air chamber, the first inflation valve is positioned on the cavity wall of the low-pressure air chamber, the first piston separates nitrogen and oil in the low-pressure air chamber, the nitrogen in the low-pressure air chamber can be filled through the first inflation valve, and the low-pressure air chamber can meet the rigidity requirement of the engineering vehicle under the no-load working condition; the high-pressure air chamber is provided with a second inflation valve and a second piston, the second piston is positioned in the high-pressure air chamber, the second inflation valve is positioned on the cavity wall of the high-pressure air chamber, the second piston separates nitrogen and oil in the high-pressure air chamber, the nitrogen in the high-pressure air chamber can be filled through the second inflation valve, and the high-pressure air chamber can meet the rigidity requirement of the engineering vehicle under the full-load working condition; by arranging the energy accumulator comprising the low-pressure air chamber and the high-pressure air chamber, the problems that the load difference of the engineering vehicle under the no-load working condition and the load difference under the full-load working condition are large and the rigidity is difficult to match are solved.
It can be understood that the engineering vehicle is divided into two working conditions of no-load and full-load, the load difference of the two working conditions is huge, the energy accumulator in the related technology only has one air chamber and is difficult to meet the rigidity requirements of the two working conditions at the same time, for example, the empty comfort is met, and the full-load vibration reduction is abandoned; the utility model provides an oil gas linkage's energy storage ware, including two air chambers of low pressure air chamber and high-pressure air chamber, low pressure air chamber can satisfy the rigidity demand of engineering vehicle at no-load operating mode, and high-pressure air chamber can satisfy the rigidity demand of engineering vehicle at full load operating mode, has solved the engineering vehicle under no-load operating mode and the load under full load operating mode and has differed great, and rigidity is difficult to the problem of matching.
In any of the above technical solutions, preferably, the hydro-pneumatic suspension device further includes: and the valve block is communicated with the first rodless cavity, the second rodless cavity and the energy accumulator.
In the technical scheme, the oil-gas suspension device further comprises a valve block, the valve block is communicated with the first rodless cavity, the second rodless cavity and the energy accumulator, namely the first rodless cavity of the middle suspension cylinder is communicated with the valve block through a pipeline, the second rodless cavity of the rear suspension cylinder is communicated with the valve block through a pipeline, and the valve block is further communicated with the energy accumulator through a pipeline, so that the first rodless cavity, the second rodless cavity and the energy accumulator can be communicated with each other, oil in the first rodless cavity and the second rodless cavity can enter the energy accumulator through the pipeline, and similarly, the oil in the energy accumulator can also return to the first rodless cavity and the second rodless cavity through the pipeline.
In any of the above technical solutions, preferably, the hydro-pneumatic suspension device further includes: a variable damping device, the variable damping device comprising: the throttle valve is communicated with the first rodless cavity, the second rodless cavity and the energy accumulator; and the one-way valve is connected with the throttle valve in parallel, the flow direction of the one-way valve is that the one-way valve flows into the energy accumulator from the first rodless cavity and the second rodless cavity, or the flow direction of the one-way valve flows into the first rodless cavity and the second rodless cavity from the energy accumulator in a one-way mode.
In the technical scheme, the variable damping device comprises a throttle valve and a one-way valve, the throttle valve is communicated with the first rodless cavity, the second rodless cavity and the energy accumulator, namely the throttle valve is arranged on a pipeline communicated with the first rodless cavity, the second rodless cavity and the energy accumulator, when oil flows through the throttle valve, kinetic energy generated by road surface vibration excitation can be converted into heat energy to be dissipated, so that vibration is attenuated, and the frame is stable.
Furthermore, the check valve is connected with the throttle valve in parallel, and the check valve and the throttle valve are matched for use, so that oil can flow in two directions, but the damping force of the oil flowing towards the two directions is different, the damping changing effect is achieved, and the smoothness of the engineering vehicle is improved; the flow direction of the one-way valve is that the one-way valve flows into the energy accumulator from the first rodless cavity and the second rodless cavity in a one-way mode; specifically, when oil in the first rodless cavity and the second rodless cavity enters the energy accumulator, the check valve is opened, and the oil enters the energy accumulator from two passages, namely the check valve and the throttle valve, so that the middle suspension cylinder and the rear suspension cylinder can retract quickly; when oil flows back into the first rodless cavity and the second rodless cavity from the energy accumulator, the one-way valve is closed, and the oil can only enter the middle suspension cylinder and the rear suspension cylinder from one passage of the throttle valve, so that the middle suspension cylinder and the rear suspension cylinder extend out slowly.
Or the flow direction of the one-way valve is that the energy accumulator flows into the first rodless cavity and the second rodless cavity in a one-way mode; specifically, when oil flows back into the first rodless cavity and the second rodless cavity from the energy accumulator, the check valve is opened, and the oil enters the first rodless cavity and the second rodless cavity from two passages of the check valve and the throttle valve at the same time, so that the middle suspension cylinder and the rear suspension cylinder can extend out quickly, the tire can land quickly, and the reaction speed and the ground gripping performance are improved; when oil in the first rodless cavity and the second rodless cavity enters the energy accumulator, the one-way valve is closed, and the oil can enter the energy accumulator only through one passage of the throttle valve, so that the middle suspension cylinder and the rear suspension cylinder can retract slowly.
In any of the above technical solutions, preferably, the hydro-pneumatic suspension device further includes: the valve block is communicated with the first rodless cavity, the second rodless cavity and the energy accumulator; the variable damping device is integrated on the valve block.
In the technical scheme, the hydro-pneumatic suspension device further comprises a valve block and a variable damping device, the variable damping device is integrated on the valve block, and the variable damping device is integrated in the valve block, so that the structure of a product is simplified, and the installation and adjustment of the product are facilitated. Preferably, the valve block is communicated with the first rodless cavity, the second rodless cavity and the energy accumulator, namely the first rodless cavity of the middle suspension cylinder is communicated with the valve block through a pipeline, the second rodless cavity of the rear suspension cylinder is communicated with the valve block through a pipeline, the valve block is also communicated with the energy accumulator through a pipeline, so that the first rodless cavity, the second rodless cavity and the energy accumulator can be communicated with each other, oil in the first rodless cavity and the second rodless cavity can enter the energy accumulator through the pipeline, and similarly, the oil in the energy accumulator can also return to the first rodless cavity and the second rodless cavity through the pipeline.
In any of the above technical solutions, preferably, the middle suspension cylinder includes: the bottom end of the middle cylinder barrel is provided with a first opening facing downwards, and the middle cylinder rod extends out and retracts from the first opening; the rear suspension cylinder includes: the bottom end of the rear cylinder barrel is provided with a second opening facing downwards, and the rear cylinder rod extends out and retracts from the second opening.
In this technical scheme, well suspension cylinder includes well jar bucket and well jar pole, and the bottom of well jar bucket is equipped with the first opening towards the below, and well jar pole stretches out and contracts by first opening, also hangs the jar in promptly and installs for invering, well jar pole installation towards the below promptly, and well jar pole installation towards the below has following advantage: firstly, the guide piece and the sealing piece of the middle cylinder rod and the middle suspension cylinder can be fully lubricated, and the service life of the guide piece and the sealing piece is prolonged; secondly, dust and impurities are not easy to accumulate at the dust ring of the middle suspension cylinder, the surface of the middle cylinder rod is not easy to scratch, and a plating layer on the surface of the middle cylinder rod can be effectively protected from being damaged; and thirdly, air remained at the sealing element of the middle suspension cylinder can move upwards in the oil liquid, so that the sealing element is prevented from being burnt by the gas explosion phenomenon.
Furthermore, the rear suspension cylinder comprises a rear cylinder barrel and a rear cylinder rod, a second opening facing downwards is formed in the bottom end of the rear cylinder barrel, and the rear cylinder rod extends out of and retracts back from the second opening; that is, the rear suspension cylinder is installed in an inverted manner, that is, the rear cylinder rod is installed downward, and the rear cylinder rod is installed downward, so that the rear suspension cylinder has the following advantages: firstly, the guide piece and the sealing piece of the rear cylinder rod and the rear suspension cylinder can be fully lubricated, and the service life of the guide piece and the sealing piece is prolonged; secondly, dust and impurities are not easy to accumulate at the dust ring of the rear suspension cylinder, the surface of the rear cylinder rod is not easy to scratch, and a plating layer on the surface of the rear cylinder rod can be effectively protected from being damaged; thirdly, the residual air at the sealing element of the rear suspension cylinder can move upwards after the oil liquid, and the sealing element is prevented from being burnt by the gas explosion phenomenon.
In any of the above solutions, preferably, variable damping devices are provided on the middle cylinder rod and the rear cylinder rod, respectively.
In the technical scheme, variable damping devices are respectively arranged on the middle cylinder rod and the rear cylinder rod, namely, the one-way valve and the throttle valve are arranged on the middle cylinder rod and the rear cylinder rod, and preferably, the one-way valve and the throttle valve are distributed and arranged in the circumferential direction of the middle cylinder rod and the rear cylinder rod, so that throttling and heat dissipation are more uniform.
In any of the above technical solutions, preferably, the number of the variable damping devices is plural, and the plural variable damping devices are respectively provided on the middle cylinder rod and the rear cylinder rod.
In the technical scheme, a plurality of variable damping devices are respectively arranged on the middle cylinder rod and the rear cylinder rod, so that a designer can correspondingly select a throttle valve and a one-way valve with small flow to ensure that the total flow is kept unchanged, and the one-way valve and the throttle valve are distributed in the circumferential direction of the middle cylinder rod and the rear cylinder rod, so that the throttling and the heat dissipation are more uniform, and the service performance of a product is improved. Preferably, two variable damping devices are provided on the middle cylinder rod and two variable damping devices are provided on the rear cylinder rod.
In any of the above technical solutions, preferably, the hydro-pneumatic suspension device further includes: the middle cylinder rod and the rear cylinder rod are connected with the axle through a first knuckle bearing; the middle cylinder barrel and the rear cylinder barrel are connected with the frame through a second joint bearing.
In the technical scheme, the hydro-pneumatic suspension device further comprises an axle, the middle cylinder rod and the rear cylinder rod are connected with the axle through the first joint bearing, the middle cylinder barrel and the rear cylinder barrel are connected with the frame through the second joint bearing, and the middle suspension cylinder and the rear suspension cylinder can swing freely without being influenced by lateral force in a spherical contact mode of the first joint bearing and the second joint bearing, so that the eccentric wear and oil leakage risks of the middle suspension cylinder and the rear suspension cylinder are reduced. It will be appreciated that the vehicle axle comprises a central axle to which a central cylinder rod is connected and a rear axle to which a rear cylinder rod is connected.
According to the utility model discloses a second aspect, the utility model provides an engineering vehicle has the hydro-pneumatic suspension device that the arbitrary embodiment of first aspect provided, therefore, the utility model discloses an engineering vehicle that provides has the whole beneficial effect of the hydro-pneumatic suspension device that the arbitrary embodiment of first aspect provided, does not enumerate one by one here.
In the description of the present invention, it should be noted that the present invention may include any applicable engineering vehicle, including but not limited to a wide dump truck and a road heavy truck, which can transport articles according to the technical solution of the present invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic structural view of an hydro-pneumatic suspension device according to an embodiment of the present invention;
FIG. 2 shows a schematic structural view of an hydro-pneumatic suspension device according to another embodiment of the present invention;
FIG. 3 illustrates a schematic structural view of an hydro-pneumatic suspension device according to yet another embodiment of the present invention;
figure 4 shows a close-up view of the hydro-pneumatic suspension device of figure 3 at a in accordance with one embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:
1 hydro-pneumatic suspension device, 10 vehicle frame, 20 suspension cylinder, 202 first rod chamber, 204 first rodless chamber, 206 middle cylinder barrel, 208 middle cylinder rod, 30 rear suspension cylinder, 302 second rod chamber, 304 second rodless chamber, 306 rear cylinder barrel, 308 rear cylinder rod, 40 accumulator, 402 low pressure air chamber, 404 first inflation valve, 406 first piston, 408 high pressure air chamber, 410 second inflation valve, 412 second piston, 50 valve block, 60 variable damping device, 602 throttle valve, 604 one-way valve, 70 pipeline, 80 first knuckle bearing, 90 second knuckle bearing.
Detailed Description
In order that the above aspects, features and advantages of the present invention can be more clearly understood, a further detailed description of the present invention will be given below with reference to the accompanying drawings and the detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
An oil gas suspension device 1 and a working vehicle according to some embodiments of the present invention will be described below with reference to fig. 1 to 4.
As shown in fig. 1 to 3, a first aspect of the present invention provides an oil-gas suspension device 1, including: a frame 10; a middle suspension cylinder 20 connected to frame 10, middle suspension cylinder 20 including a first rod chamber 202 and a first rod chamber 204; a rear suspension cylinder 30 coupled to frame 10, rear suspension cylinder 30 including a second rod chamber 302 and a second rodless chamber 304; an accumulator 40 in communication with the first rod chamber 204 and the second rod chamber 304; wherein the first rod chamber 202 is in communication with the second rod chamber 302 and the first rodless chamber 204 is in communication with the second rodless chamber 304.
The utility model provides an oil gas suspension device 1 includes frame 10, well suspension cylinder 20, back suspension cylinder 30 and energy storage ware 40, well suspension cylinder 20 and back suspension cylinder 30 all movably are connected with frame 10, well suspension cylinder 20 includes first there is pole chamber 202 and first no pole chamber 204, back suspension cylinder 30 includes that the second has pole chamber 302 and second no pole chamber 304, energy storage ware 40 is linked together with first no pole chamber 204 and second no pole chamber 304, wherein, the first pole chamber 202 that has of well suspension cylinder 20 is linked together with the second that back suspension cylinder 30 has pole chamber 302, the first no pole chamber 204 of well suspension cylinder 20 is linked together with the second no pole chamber 304 that back suspension cylinder 30, make the flexible mutual compensation of well suspension cylinder 20 and back suspension cylinder 30, form the effect of hydraulic balance beam, thereby make the fluctuation change of wheel ability quick response road surface around the engineering vehicle. Further, the hydro-pneumatic suspension device 1 of the present invention is of an oil-gas separation type, hydraulic oil is stored in the middle suspension cylinder 20 and the rear suspension cylinder 30, and nitrogen is stored in the air chamber of the energy accumulator 40; oil and gas are separated by a piston within accumulator 40. Under the condition that the oil-gas suspension device 1 is used in an engineering vehicle, the middle suspension cylinder 20 and the rear suspension cylinder 30 on the same side of the engineering vehicle are communicated through a pipeline 70, wherein the first rod cavity 202 is connected with the second rod cavity 302, the first rodless cavity 204 is connected with the second rodless cavity 304, the middle suspension cylinder 20 and the rear suspension cylinder 30 are mutually compensated in a telescopic mode, the effect of a mechanical balance beam is formed like a seesaw, six-point constraint of the frame 10, the middle suspension cylinder 20, the rear suspension cylinder 30 and a front suspension cylinder of the engineering vehicle is reduced into four-point constraint, and the defect that the wheel grip performance of the frame 10 is insufficient due to over-constraint is avoided.
It can be appreciated that the hydro-pneumatic suspension device 1 of the present invention further comprises: an axle (not shown) connected to the middle suspension cylinder 20 and the rear suspension cylinder 30, and a guide mechanism, i.e., a tie rod, a trailing rod, etc., connected to the axle.
As shown in fig. 1 to 3, in an embodiment of the present invention, preferably, the accumulator 40 includes: a low pressure plenum 402 and a high pressure plenum 408; the low-pressure air chamber 402 is provided with a first inflation valve 404 and a first piston 406, the first piston 406 is positioned inside the low-pressure air chamber 402, and the first inflation valve 404 is positioned on the wall of the low-pressure air chamber 402; the high pressure chamber 408 is provided with a second inflation valve 410 and a second piston 412, the second piston 412 is located inside the high pressure chamber 408, and the second inflation valve 410 is located on the chamber wall of the high pressure chamber 408.
In this embodiment, accumulator 40 includes a low pressure gas chamber 402 and a high pressure gas chamber 408; the low-pressure air chamber 402 is provided with a first inflation valve 404 and a first piston 406, the first piston 406 is located inside the low-pressure air chamber 402, the first inflation valve 404 is located on the cavity wall of the low-pressure air chamber 402, the first piston 406 separates nitrogen and oil in the low-pressure air chamber 402, the nitrogen in the low-pressure air chamber 402 can be filled through the first inflation valve 404, and the low-pressure air chamber 402 can meet the rigidity requirement of the engineering vehicle under the no-load working condition; the high-pressure air chamber 408 is provided with a second inflation valve 410 and a second piston 412, the second piston 412 is located inside the high-pressure air chamber 408, the second inflation valve 410 is located on the cavity wall of the high-pressure air chamber 408, the second piston 412 separates nitrogen and oil in the high-pressure air chamber 408, the nitrogen in the high-pressure air chamber 408 can be filled through the second inflation valve 410, and the high-pressure air chamber 408 can meet the rigidity requirement of the engineering vehicle under the full-load working condition; by arranging the energy accumulator 40 to comprise the low-pressure air chamber 402 and the high-pressure air chamber 408, the problems that the load difference of the engineering vehicle under the no-load working condition and the load difference under the full-load working condition are large and the rigidity is difficult to match are solved.
It can be understood that the engineering vehicle is divided into two working conditions of no-load and full-load, the load difference between the two working conditions is huge, and the energy accumulator 40 in the related art has only one air chamber and is difficult to meet the rigidity requirements of the two working conditions at the same time, for example, the empty comfort is met, and the full-load vibration reduction is abandoned; the utility model provides an accumulator 40 of hydro-pneumatic suspension device 1, including two air chambers of low pressure air chamber 402 and high-pressure air chamber 408, low pressure air chamber 402 can satisfy the rigidity demand of engineering vehicle at no-load operating mode, and high-pressure air chamber 408 can satisfy the rigidity demand of engineering vehicle at full-load operating mode, has solved the engineering vehicle under no-load operating mode and the load under full-load operating mode differs great, and rigidity is difficult to the problem of matching.
As shown in fig. 1 to 3, in an embodiment of the present invention, preferably, the hydro-pneumatic suspension device 1 further includes: valve block 50 communicates between first rod chamber 204, second rod chamber 304 and accumulator 40.
In this embodiment, the hydro-pneumatic suspension device 1 further includes a valve block 50, the valve block 50 communicates with the first rod-less chamber 204, the second rod-less chamber 304 and the accumulator 40, that is, the first rod-less chamber 204 of the middle suspension cylinder 20 communicates with the valve block 50 through a conduit 70, the second rod-less chamber 304 of the rear suspension cylinder 30 communicates with the valve block 50 through a conduit 70, and the valve block 50 further communicates with the accumulator 40 through a conduit 70, so that the first rod-less chamber 204, the second rod-less chamber 304 and the accumulator 40 can communicate with each other, so that the oil in the first rod-less chamber 204 and the second rod-less chamber 304 can enter the accumulator 40 through the conduit 70, and similarly, the oil in the accumulator 40 can also return to the first rod-less chamber 204 and the second rod-less chamber 304 through the conduit 70.
As shown in fig. 1 to 4, in an embodiment of the present invention, preferably, the hydro-pneumatic suspension device 1 further includes: a variable damping device 60, the variable damping device 60 comprising: a throttle valve 602 in communication with the first rodless chamber 204, the second rodless chamber 304, and the accumulator 40; and a check valve 604 connected in parallel with the throttle valve 602, wherein the flow direction of the check valve 604 is from the first rodless chamber 204 and the second rodless chamber 304 to the accumulator 40 in a single direction, or the flow direction of the check valve 604 is from the accumulator 40 to the first rodless chamber 204 and the second rodless chamber 304 in a single direction.
In this embodiment, the variable damping device 60 includes a throttle valve 602 and a check valve 604, the throttle valve 602 is communicated with the first and second rod-less chambers 204, 304 and the energy accumulator 40, that is, the throttle valve 602 is disposed on the pipeline 70 communicating the first and second rod-less chambers 204, 304 and the energy accumulator 40, when oil flows through the throttle valve 602, kinetic energy generated by road surface excitation is converted into heat energy to be dissipated, so that vibration is attenuated, and the frame 10 quickly tends to be stable.
Furthermore, the check valve 604 is connected with the throttle valve 602 in parallel, and the check valve 604 and the throttle valve 602 are matched for use, so that oil can flow in two directions, but damping forces of the oil flowing towards two directions are different, the damping changing effect is achieved, and the smoothness of the engineering vehicle is improved; the flow direction of the check valve 604 is from the first rodless chamber 204 to the second rodless chamber 304 to the accumulator 40 in one direction; specifically, as shown in fig. 1, when oil in the first rod chamber 204 and the second rod chamber 304 enters the accumulator 40, the check valve 604 opens, and oil enters the accumulator 40 from both passages of the check valve 604 and the throttle valve 602, so that the middle suspension cylinder 20 and the rear suspension cylinder 30 can be retracted quickly; when oil flows back from accumulator 40 into first rod chamber 204 and second rod chamber 304, check valve 604 closes and oil can only pass through throttle 602 into middle suspension cylinder 20 and rear suspension cylinder 30, causing middle suspension cylinder 20 and rear suspension cylinder 30 to extend slowly.
Alternatively, as shown in FIG. 2, the one-way valve 604 may be configured to provide one-way flow from the accumulator 40 into the first rod chamber 204 and the second rod chamber 304; specifically, when oil flows back into the first rodless chamber 204 and the second rodless chamber 304 from the accumulator 40, the check valve 604 is opened, and the oil enters the first rodless chamber 204 and the second rodless chamber 304 from two passages of the check valve 604 and the throttle valve 602 at the same time, so that the middle suspension cylinder 20 and the rear suspension cylinder 30 can extend out quickly, the tire can land quickly, and the reaction speed and the grip performance are improved; when oil in the first and second rod-less chambers 204, 304 enters the accumulator 40, the check valve 604 closes and oil can only pass through the throttle 602 to the accumulator 40, allowing the middle and rear suspension cylinders 20, 30 to retract slowly.
As shown in fig. 1 and 2, in an embodiment of the present invention, preferably, the hydro-pneumatic suspension device 1 further includes: a valve block 50 communicating the first rod-less chamber 204, the second rod-less chamber 304, and the accumulator 40; the variable damping device 60 is integrated on the valve block 50.
In this embodiment, the hydro-pneumatic suspension device 1 further comprises a valve block 50 and a variable damping device 60, wherein the variable damping device 60 is integrated on the valve block 50, and the variable damping device 60 is integrated in the valve block 50, so that the structure of the product is simplified, and the installation and adjustment of the product are facilitated. Preferably, the valve block 50 communicates with the first rod-less chamber 204, the second rod-less chamber 304 and the accumulator 40, that is, the first rod-less chamber 204 of the middle suspension cylinder 20 communicates with the valve block 50 through the pipe 70, the second rod-less chamber 304 of the rear suspension cylinder 30 communicates with the valve block 50 through the pipe 70, and the valve block 50 further communicates with the accumulator 40 through the pipe 70, so that the first rod-less chamber 204, the second rod-less chamber 304 and the accumulator 40 can communicate with each other, so that the oil in the first rod-less chamber 204 and the second rod-less chamber 304 can enter the accumulator 40 through the pipe 70, and similarly, the oil in the accumulator 40 can also return to the first rod-less chamber 204 and the second rod-less chamber 304 through the pipe 70.
As shown in fig. 1 to 3, in an embodiment of the present invention, it is preferable that the middle suspension cylinder 20 includes: the middle cylinder barrel 206 and the middle cylinder rod 208, the bottom end of the middle cylinder barrel 206 is provided with a first opening facing downwards, and the middle cylinder rod 208 extends out and retracts from the first opening; the rear suspension cylinder 30 includes: a rear cylinder barrel 306 and a rear cylinder rod 308, wherein the bottom end of the rear cylinder barrel 306 is provided with a second opening facing downwards, and the rear cylinder rod 308 extends out and retracts from the second opening.
In this embodiment, the central suspension cylinder 20 includes a central cylinder barrel 206 and a central cylinder rod 208, the bottom end of the central cylinder barrel 206 is provided with a first opening facing downward, the central cylinder rod 208 extends and retracts from the first opening, that is, the central suspension cylinder 20 is installed upside down, that is, the central cylinder rod 208 is installed facing downward, and the central cylinder rod 208 is installed facing downward, which has the following advantages: firstly, the guide parts and the sealing parts of the middle cylinder rod 208 and the middle suspension cylinder 20 can be fully lubricated, and the service lives of the guide parts and the sealing parts are prolonged; secondly, dust and impurities are not easy to accumulate at the dust ring of the middle suspension cylinder 20, the surface of the middle cylinder rod 208 is not easy to scratch, and a plating layer on the surface of the middle cylinder rod 208 can be effectively protected from being damaged; thirdly, air remained at the sealing element of the middle suspension cylinder 20 can move upwards in oil liquid, and the sealing element is prevented from being burnt by the gas explosion phenomenon.
Further, the rear suspension cylinder 30 comprises a rear cylinder barrel 306 and a rear cylinder rod 308, a second opening facing downward is formed at the bottom end of the rear cylinder barrel 306, and the rear cylinder rod 308 extends out and retracts from the second opening; that is, the rear suspension cylinder 30 is installed upside down, that is, the rear cylinder rod 308 is installed downward, and the rear cylinder rod 308 is installed downward, which has the following advantages: firstly, the guide parts and the sealing parts of the rear cylinder rod 308 and the rear suspension cylinder 30 can be fully lubricated, and the service lives of the guide parts and the sealing parts are prolonged; secondly, dust and impurities are not easy to accumulate at the dust ring of the rear suspension cylinder 30, the surface of the rear cylinder rod 308 is not easy to scratch, and a plating layer on the surface of the rear cylinder rod 308 can be effectively protected from being damaged; thirdly, air remained at the sealing element of the rear suspension cylinder 30 can move upwards after oil liquid, and the sealing element is prevented from being burnt by gas explosion.
As shown in fig. 3, in one embodiment of the present invention, it is preferable that the variable damping device 60 is provided on each of the middle cylinder rod 208 and the rear cylinder rod 308.
In this embodiment, the variable damping device 60 is disposed on the middle cylinder rod 208 and the rear cylinder rod 308, respectively, that is, the check valve 604 and the throttle valve 602 are disposed on the middle cylinder rod 208 and the rear cylinder rod 308, and preferably, the check valve 604 and the throttle valve 602 are disposed in a distributed manner in the circumferential direction of the middle cylinder rod 208 and the rear cylinder rod 308, so that the throttling and the heat dissipation are more uniform.
It is to be understood that the one-way valve 604 may be configured to provide one-way flow from the first rod chamber 204 and the second rod chamber 304 into the accumulator 40; one-way flow from accumulator 40 into first rodless chamber 204 and second rodless chamber 304 is also possible.
As shown in fig. 3, in an embodiment of the present invention, it is preferable that the number of the variable damping devices 60 is plural, and plural variable damping devices 60 are respectively provided on the middle cylinder rod 208 and the rear cylinder rod 308.
In this embodiment, a plurality of variable damping devices 60 are respectively arranged on the middle cylinder rod 208 and the rear cylinder rod 308, so that a designer can select a throttle valve 602 and a check valve 604 with smaller flow rates to ensure that the total flow rate is kept constant, and by arranging a plurality of check valves 604 and throttle valves 602 distributed in the circumferential direction of the middle cylinder rod 208 and the rear cylinder rod 308, the throttling and heat dissipation are further more uniform, and the use performance of the product is improved. Preferably, two variable damping devices 60 are provided on the middle cylinder rod 208 and two variable damping devices 60 are provided on the rear cylinder rod 308.
As shown in fig. 1 to 3, in an embodiment of the present invention, preferably, the hydro-pneumatic suspension device 1 further includes: the axle, the middle cylinder rod 208 and the rear cylinder rod 308 are connected with the axle through the first knuckle bearing 80; the middle cylinder barrel 206 and the rear cylinder barrel 306 are connected with the frame 10 through the second joint bearing 90.
In this embodiment, the hydro-pneumatic suspension device 1 further includes an axle, the middle cylinder rod 208 and the rear cylinder rod 308 are connected to the axle through the first joint bearing 80, the middle cylinder barrel 206 and the rear cylinder barrel 306 are connected to the frame 10 through the second joint bearing 90, and the spherical contact manner of the first joint bearing 80 and the second joint bearing 90 ensures that the middle suspension cylinder 20 and the rear suspension cylinder 30 can swing freely without being affected by lateral force, so that the eccentric wear and oil leakage risk of the middle suspension cylinder 20 and the rear suspension cylinder 30 are reduced. It will be appreciated that the vehicle axle includes a center axle to which the center rod 208 is connected and a rear axle to which the rear rod 308 is connected.
As shown in fig. 1 to 4, according to the second aspect of the present invention, the present invention provides an engineering vehicle having an hydro-pneumatic suspension device 1 provided in any one of the embodiments of the first aspect, therefore, the embodiment of the present invention provides an engineering vehicle having all the beneficial effects of the hydro-pneumatic suspension device 1 provided in any one of the embodiments of the first aspect, which are not listed here.
In the description of the present invention, it should be noted that the present invention may include any applicable engineering vehicle, including but not limited to a wide dump truck and a road heavy truck, which can transport articles.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In the present disclosure, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An hydro-pneumatic suspension device, comprising:
a frame;
the middle suspension cylinder is connected with the frame and comprises a first rod cavity and a first rodless cavity;
the rear suspension cylinder is connected with the frame and comprises a second rod cavity and a second rodless cavity;
an accumulator in communication with the first rodless chamber and the second rodless chamber;
the first rod cavity is communicated with the second rod cavity, and the first rodless cavity is communicated with the second rodless cavity.
2. The hydro-pneumatic suspension device of claim 1,
the accumulator includes: a low pressure gas chamber and a high pressure gas chamber;
the low-pressure air chamber is provided with a first inflation valve and a first piston, the first piston is positioned inside the low-pressure air chamber, and the first inflation valve is positioned on the wall of the low-pressure air chamber;
and a second inflation valve and a second piston are arranged on the high-pressure air chamber, the second piston is positioned in the high-pressure air chamber, and the second inflation valve is positioned on the chamber wall of the high-pressure air chamber.
3. The hydrocarbon suspension device of claim 1, further comprising:
a valve block communicating the first rodless chamber, the second rodless chamber, and the accumulator.
4. The hydrocarbon suspension device of claim 1, further comprising: a variable damping device, the variable damping device comprising:
a throttle valve in communication with the first rodless chamber, the second rodless chamber, and the accumulator;
and the one-way valve is connected with the throttle valve in parallel, and the flow direction of the one-way valve is that the one-way valve flows into the energy accumulator from the first rodless cavity and the second rodless cavity in a one-way mode, or the flow direction of the one-way valve flows into the first rodless cavity and the second rodless cavity from the energy accumulator in a one-way mode.
5. The hydro-pneumatic suspension device of claim 4,
the hydro-pneumatic suspension device further comprises:
a valve block communicating the first rodless chamber, the second rodless chamber, and the accumulator;
the variable damping device is integrated on the valve block.
6. The hydro-pneumatic suspension device of claim 4,
the well suspension cylinder includes: the bottom end of the middle cylinder barrel is provided with a first opening facing downwards, and the middle cylinder rod extends out of and retracts into the first opening;
the rear suspension cylinder includes: the cylinder comprises a rear cylinder barrel and a rear cylinder rod, wherein a second opening facing downwards is formed in the bottom end of the rear cylinder barrel, and the rear cylinder rod extends out of and retracts into the second opening.
7. The hydro-pneumatic suspension device of claim 6,
the variable damping devices are respectively arranged on the middle cylinder rod and the rear cylinder rod.
8. The hydro-pneumatic suspension device of claim 7,
the number of the variable damping devices is multiple, and the middle cylinder rod and the rear cylinder rod are respectively provided with the multiple variable damping devices.
9. The hydrocarbon suspension device of claim 7 or 8, further comprising:
the middle cylinder rod and the rear cylinder rod are connected with the axle through a first knuckle bearing;
the middle cylinder barrel and the rear cylinder barrel are connected with the frame through a second joint bearing.
10. A work vehicle, characterized by comprising:
the hydro-pneumatic suspension device of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921267988.2U CN210792722U (en) | 2019-08-07 | 2019-08-07 | Hydro-pneumatic suspension device and engineering vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921267988.2U CN210792722U (en) | 2019-08-07 | 2019-08-07 | Hydro-pneumatic suspension device and engineering vehicle |
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| Publication Number | Publication Date |
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| CN210792722U true CN210792722U (en) | 2020-06-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110450592A (en) * | 2019-08-07 | 2019-11-15 | 三一重型装备有限公司 | Oil gas suspended device and engineering truck |
-
2019
- 2019-08-07 CN CN201921267988.2U patent/CN210792722U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110450592A (en) * | 2019-08-07 | 2019-11-15 | 三一重型装备有限公司 | Oil gas suspended device and engineering truck |
| CN110450592B (en) * | 2019-08-07 | 2024-04-05 | 三一重型装备有限公司 | Hydro-pneumatic suspension device and engineering vehicle |
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