CN103057374A - Hydro-pneumatic suspension system and engineering vehicle - Google Patents
Hydro-pneumatic suspension system and engineering vehicle Download PDFInfo
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- CN103057374A CN103057374A CN2012105787349A CN201210578734A CN103057374A CN 103057374 A CN103057374 A CN 103057374A CN 2012105787349 A CN2012105787349 A CN 2012105787349A CN 201210578734 A CN201210578734 A CN 201210578734A CN 103057374 A CN103057374 A CN 103057374A
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Abstract
The invention provides a hydro-pneumatic suspension system and an engineering vehicle. The hydro-pneumatic suspension system comprises a suspension cylinder, an energy accumulator, a controller and a position sensor arranged in the suspension cylinder. The position sensor is used for detecting the relative position of a cylinder barrel and a piston rod of the suspension cylinder in real time and sending a detection signal to the controller. The built-in position sensor is arranged in the suspension cylinder, the relative position of the cylinder barrel and the piston rod can be monitored in real time through the controller, a lifting control valve performs oil discharge or oil inlet on a rodless cavity of the suspension cylinder so as to continuously adjust extending length of the suspension cylinder, therefore vehicle height can be adjusted continuously, vehicle body posture can be controlled accurately, and passing capacity of the vehicle at terrible road condition is improved greatly.
Description
Technical field
The present invention relates to engineering machinery field, particularly a kind of hydro-pneumatic suspension system and engineering truck.
Background technology
Oleo-pneumatic suspension be with the fluid transmission of pressure, with unreactable gas (being generally nitrogen) as elastic medium, with a kind of suspension gear as shock absorber component such as cutoff port, check valve, because it has good cushioning performance, ride comfort and vehicle run stability, be widely applied in a lot of Wheel Engineering, such as full Terrain Cranes, quarry tipper, missile transporter vehicle etc.At present, the oleo-pneumatic suspension major part that engineering truck is used all belongs to the passive suspension category, in the Vehicle Driving Cycle process, its rigidity and damping force characteristics all can't carry out active adjustment, can not satisfy complicated road and driving cycle demand fully (when travelling such as the expressway, for improving car body stability, then be necessary suitably to increase and hang dumping force; During such as land locomotion, grab ground ability and traveling comfort for improving tire, be necessary suitably to reduce to hang dumping force).And the cylinder barrel of hanging oil cylinder and piston rod relative position can't be realized Real Time Monitoring, thereby can't accurately control in real time the car body attitude, and (such as culvert, gully) carrying capacity is relatively poor under the abominable road conditions.
Summary of the invention
In view of this, the present invention is intended to propose a kind of hydro-pneumatic suspension system and engineering truck, with the cylinder barrel that solves hanging oil cylinder and the problem that the piston rod relative position can't be realized Real Time Monitoring.
For achieving the above object, technical scheme of the present invention is achieved in that
On the one hand, the invention provides a kind of hydro-pneumatic suspension system, comprise hanging oil cylinder and energy storage, also comprise controller and be arranged on the interior position transduser of described hanging oil cylinder, described position transduser is sent to described controller for the relative position of the cylinder barrel that detects in real time described hanging oil cylinder and piston rod and with described detection signal.
Further, also comprise be used to the rodless cavity oil-feed of controlling described hanging oil cylinder or the lift controil valve of oil extraction.
Further, described hanging oil cylinder comprises left hanging oil cylinder and right hanging oil cylinder, described energy storage comprises left energy storage and right energy storage, described left energy storage is communicated with the rodless cavity of described left hanging oil cylinder and the rod chamber of right hanging oil cylinder simultaneously, and described right energy storage is communicated with the rodless cavity of described right hanging oil cylinder and the rod chamber of left hanging oil cylinder simultaneously.
Further, the oil circuit between described left energy storage and described right hanging oil cylinder rod chamber is provided with left damping arrangement, and the oil circuit between described right energy storage and described left hanging oil cylinder rod chamber is provided with right damping arrangement.
Further, also comprise respectively left check valve, the right check valve in parallel with described left damping arrangement, right damping arrangement, the circulating direction of described left check valve is the rod chamber by the described left hanging oil cylinder of the unidirectional inflow of described right energy storage, the circulating direction of described right check valve is the rod chamber by the described right hanging oil cylinder of the unidirectional inflow of described left energy storage, namely the oil inlet of this left check valve is communicated with right energy storage, oil outlet is communicated with the rodless cavity of this left hanging oil cylinder, the oil inlet of right check valve is communicated with left energy storage 21, and oil outlet is communicated with the rodless cavity of right hanging oil cylinder.
Further, on the oil circuit between described left energy storage and the described left hanging oil cylinder rodless cavity, and be provided with directional control valve on the oil circuit between described right energy storage and the described right hanging oil cylinder rodless cavity.
Further, described position transduser comprises the feeler lever in the cylinder barrel that is connected to described hanging oil cylinder and is installed in sensing element on the piston rod of described hanging oil cylinder, and described feeler lever also can be movable relatively with the position of detection described cylinder barrel in real-time continuous ground with respect to described piston rod with the socket of described sensing element.
Further, described lift controil valve is the solenoid directional control valve that is controlled by described controller.
Further, described left damping arrangement and/or right damping arrangement are the apportioning valve that is controlled by described controller.
Further, described left damping arrangement and/or right damping arrangement are the Multi-stage damping transfer valve.
Further, described Multi-stage damping transfer valve comprise at least two damping holes parallel with one another and with described damping hole at least one directional control valve of connecting.
Further, described directional control valve is the two-position two-way solenoid valve that is controlled by described controller.
On the other hand, the present invention also provides a kind of engineering truck that is provided with aforesaid hydro-pneumatic suspension system.
With respect to prior art, the present invention has following advantage:
(1) hydro-pneumatic suspension system of the present invention is provided with built-in position transduser in hanging oil cylinder, can be by the relative position of controller Real Time Monitoring cylinder barrel and piston rod, and can be by rodless cavity oil extraction or the oil-feed of lift controil valve to hanging oil cylinder, extension elongation with continuous adjusting hanging oil cylinder, and then realize that overall height is adjustable continuously, can accurately control the car body attitude, greatly improve the carrying capacity of vehicle under abominable road conditions.
(2) hydro-pneumatic suspension system of the present invention be about mutual connected system, be that left energy storage is communicated with the rod chamber of right hanging oil cylinder, right energy storage is communicated with the rod chamber of left hanging oil cylinder, this structure so that left hanging oil cylinder when road conditions badly cause stroke larger, left hanging oil cylinder rodless cavity also strengthens left energy storage pressure, and then left energy storage is increased to the rod chamber pressure of right hanging oil cylinder, make the stroke of right hanging oil cylinder also become large, and then vehicle's center of gravity is reduced, the wigwag motion degree alleviates, make vehicle operating more steady, right hanging oil cylinder principle of work also is like this.
(3) the left hanging oil cylinder of hydro-pneumatic suspension system of the present invention is in compression stroke, and rodless cavity directly is communicated with left energy storage by directional control valve, therefore gives full play to the effect that energy storage absorbs vibration, and right hanging oil cylinder principle of work also is like this.
(4) the left hanging oil cylinder of hydro-pneumatic suspension system of the present invention is in restoring stroke, left energy storage is directly given the rodless cavity repairing by directional control valve, repairing is abundant rapidly, can not produce existing problem of grabbing the ground scarce capacity because of the insufficient tire that may cause of repairing; The rod chamber of left hanging oil cylinder is by the energy storage oil extraction to the right of left damping arrangement simultaneously, and at this moment, left damping arrangement plays the effect that discharges vibrational energy, and right hanging oil cylinder principle of work also is like this.
(5) the left damping arrangement of hydro-pneumatic suspension system of the present invention and right damping arrangement are external damping, therefore can be according to different road conditions, and damping adjusting power is optimized the damping effect under the different road conditions in real time, better adapts to different road conditions demands.
(6) hydro-pneumatic suspension system of the present invention left energy storage to the oil circuit of left hanging oil cylinder and right energy storage to the oil circuit of right hanging oil cylinder be provided with directional control valve, this direction control cock can be used for cutting off being connected of energy storage and oil cylinder rodless cavity, and then realizes the rigid locking of hanging oil cylinder.
Description of drawings
The accompanying drawing that consists of a part of the present invention is used to provide a further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the embodiment of the invention one described hydro-pneumatic suspension system;
Fig. 2 is the structural representation of the hanging oil cylinder of the embodiment of the invention one described hydro-pneumatic suspension system;
Fig. 3 is the schematic diagram of the embodiment of the invention two described hydro-pneumatic suspension systems.
Description of reference numerals:
The left hanging oil cylinder of 11-, the right hanging oil cylinder of 12-, 13-cylinder barrel, the 14-piston rod, the left energy storage of 21-, the right energy storage of 22-, the 3-controller, 4-lift controil valve, 5-position transduser, the 51-feeler lever, 52-sensing element, 6-electric proportional valve, the left check valve of 71-, the right check valve of 72-, 8-directional control valve, 9-damping hole.
The specific embodiment
Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the present invention can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
Embodiment one
Fig. 1 and Fig. 2 are the relevant drawings of the present embodiment, as shown in FIG., the described hydro-pneumatic suspension system of the present embodiment comprises controller 3, lift controil valve 4, hanging oil cylinder, energy storage, two position transdusers 5, both direction control cock 8, left damping arrangement, right damping arrangement, left check valve 71 and right check valves 72.Wherein, hanging oil cylinder comprises 12 two of left hanging oil cylinder 11 and right hanging oil cylinder, and energy storage comprises 22 two of left energy storage 21 and right energy storages, and this direction control cock 8 is for being controlled by the normal close two-position two-way solenoid of controller 3.This left damping arrangement and right damping arrangement are two electric proportional valves 6 that are controlled by controller 3.This lift controil valve 4 is for being controlled by the solenoid directional control valve of controller 3, and this lift controil valve 4 is used for controlling left hanging oil cylinder 11 rodless cavities and 12 rodless cavity oil-feed and the oil extractions of right hanging oil cylinder, to realize the expanding-contracting action of hanging oil cylinder.This position transduser 5 comprises the feeler lever 51 in the cylinder barrel 13 that is connected to hanging oil cylinder and is installed in sensing element 52 on the piston rod 14 of hanging oil cylinder, feeler lever 51 and sensing element 52 sockets, this position transduser 5 can detect cylinder barrel 13 with respect to the position of piston rod 14 by relative motion real-time continuous ground, detection signal is imported into controller 3 again.The structure of this position transduser 5 and installation site are as shown in Figure 2.
This left energy storage 21 is communicated with the rodless cavity of left hanging oil cylinder 11 and the rod chamber of right hanging oil cylinder 12 simultaneously, and right energy storage 22 is communicated with the rodless cavity of right hanging oil cylinder 12 and the rod chamber of left hanging oil cylinder 11 simultaneously.Two electric proportional valves 6 be connected to left energy storage 21 to the oil circuit of right hanging oil cylinder 12 rod chambers and right energy storage 22 to the oil circuit of left hanging oil cylinder 11 rod chambers.This left check valve 71, right check valve 72 are in parallel with these two electric proportional valves 6 respectively, and this left check valve 71 is by the rod chamber of the right hanging oil cylinder 12 of left energy storage 21 unidirectional inflows, this right check valve 72 is by the rod chamber of the left hanging oil cylinder 11 of right energy storage 22 unidirectional inflows, namely the oil inlet of this left check valve 71 is communicated with right energy storage 22, oil outlet is communicated with the rodless cavity of left hanging oil cylinder 11, the oil inlet of this right check valve 72 is communicated with left energy storage 21, and oil outlet is communicated with the rodless cavity of right hanging oil cylinder 12.Both direction control cock 8 be connected to left energy storage 21 to the oil circuit of left hanging oil cylinder 11 rodless cavities and right energy storage 22 to the oil circuit of right hanging oil cylinder 12 rodless cavities.
The mode of operation of above-mentioned hydro-pneumatic suspension system is as follows:
(1) road running: both direction control cock 8 is got electric, left energy storage 21 is communicated with the rodless cavity of left hanging oil cylinder 11, there is energy storage to be communicated with the rodless cavity of right hanging oil cylinder 12,3 of controllers are by regulating two electric proportional valves 6 realizing that throttling control is carried out in the oil return of left hanging oil cylinder 11 and right hanging oil cylinder 12 rod chambers, and then realize that dumping force is adjustable.
(2) locking: make both direction control cock 8 dead electricity, then the rodless cavity of left hanging oil cylinder 11 and right hanging oil cylinder 12 all is in closed state.
(3) elevating control: export control signals to lift controil valve 4, both direction control cock 8, two electric proportional valves 6 by controller 3, both direction control cock 8 and two electric proportional valves 6 are all opened, the extension elongation of two position transduser 5 detection hanging oil cylinder and output detection signal are to controller 3, realize the real-time continuous monitoring of hanging oil cylinder length, at this moment, give the rodless cavity oil extraction of left hanging oil cylinder 11 and right hanging oil cylinder 12 or oil-filled by controller 3, just can accurately control the extension elongation of hanging oil cylinder, and then the car body attitude is accurately controlled.
Embodiment two
Fig. 3 is the relevant drawings of the present embodiment, and as shown in FIG., except damping arrangement, all the other structures of the present embodiment and embodiment's one is in full accord.Left damping arrangement and right damping arrangement in the present embodiment are the Multi-stage damping transfer valve, and this Multi-stage damping transfer valve comprises two damping holes parallel with one another 9 and a directional control valve 8, and this directional control valve 8 is connected with one of them damping hole 9.This direction control cock 8 by controlling the break-make of this direction control cock 8, makes damping realize having level adjustable also for being controlled by the two-position two-way solenoid valve of controller 3.
As other flexible embodiments of the present embodiment, this damping arrangement can be damping hole parallel with one another more than two 9, and this direction control cock 8 also can have a plurality of, and each directional control valve 8 is corresponding respectively connects with a damping hole 9.
Except above-mentioned hydro-pneumatic suspension system, the present invention also provides a kind of engineering truck that is provided with above-mentioned hydro-pneumatic suspension system, and the structure of other each several part of this project vehicle is with reference to prior art, and this paper repeats no more.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. hydro-pneumatic suspension system, comprise hanging oil cylinder and energy storage, it is characterized in that, also comprise controller (3) and be arranged on the interior position transduser (5) of described hanging oil cylinder, described position transduser (5) is used for the real-time cylinder barrel (13) that detects described hanging oil cylinder and is sent to described controller (3) with the relative position of piston rod (14) and with described detection signal.
2. hydro-pneumatic suspension system according to claim 1 is characterized in that, also comprises the lift controil valve (4) be used to the rodless cavity oil-feed of controlling described hanging oil cylinder or oil extraction.
3. hydro-pneumatic suspension system according to claim 1 and 2, it is characterized in that, described hanging oil cylinder comprises left hanging oil cylinder (11) and right hanging oil cylinder (12), described energy storage comprises left energy storage (21) and right energy storage (22), described left energy storage (21) is communicated with the rodless cavity of described left hanging oil cylinder (11) and the rod chamber of right hanging oil cylinder (12) simultaneously, and described right energy storage (22) is communicated with the rodless cavity of described right hanging oil cylinder (12) and the rod chamber of left hanging oil cylinder (11) simultaneously.
4. hydro-pneumatic suspension system according to claim 3, it is characterized in that, oil circuit between described left energy storage (21) and described right hanging oil cylinder (12) rod chamber is provided with left damping arrangement, and the oil circuit between described right energy storage (22) and described left hanging oil cylinder (11) rod chamber is provided with right damping arrangement.
5. hydro-pneumatic suspension system according to claim 4, it is characterized in that, also comprise respectively left check valve (71), the right check valve (72) in parallel with described left damping arrangement, right damping arrangement, the circulating direction of described left check valve (71) is the rod chamber by described right energy storage (22) the described left hanging oil cylinder of unidirectional inflow (11), and the circulating direction of described right check valve (72) is the rod chamber by described left energy storage (21) the described right hanging oil cylinder of unidirectional inflow (12).
6. hydro-pneumatic suspension system according to claim 5, it is characterized in that, on the oil circuit between described left energy storage (21) and described left hanging oil cylinder (11) rodless cavity, and be provided with directional control valve (8) on the oil circuit between described right energy storage (22) and described right hanging oil cylinder (12) rodless cavity.
7. hydro-pneumatic suspension system according to claim 1 and 2, it is characterized in that, described position transduser (5) comprises the feeler lever (51) in the cylinder barrel (13) that is connected to described hanging oil cylinder and is installed in sensing element (52) on the piston rod (14) of described hanging oil cylinder, and described feeler lever (51) and described sensing element (52) are socketed and can be movable relatively.
8. hydro-pneumatic suspension system according to claim 4 is characterized in that, described left damping arrangement and/or right damping arrangement be for being controlled by the apportioning valve of described controller (3), or described left damping arrangement and/or right damping arrangement are the Multi-stage damping transfer valve.
9. hydro-pneumatic suspension system according to claim 8 is characterized in that, described Multi-stage damping transfer valve comprise at least two damping holes parallel with one another (9) and with described damping hole (9) at least one directional control valve of connecting (8).
10. an engineering truck is characterized in that, described engineering truck is provided with such as the described hydro-pneumatic suspension system of claim 1 to 9 any one.
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| CN201210578734.9A CN103057374B (en) | 2012-12-27 | 2012-12-27 | Hydro-pneumatic suspension system and engineering truck |
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| CN201210578734.9A CN103057374B (en) | 2012-12-27 | 2012-12-27 | Hydro-pneumatic suspension system and engineering truck |
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Effective date of registration: 20161027 Address after: 410000, No. 168, Jinzhou Avenue, Jinzhou new district, Ningxiang County, Changsha, Hunan Applicant after: Sany Mobile Cranes Co., Ltd. Address before: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Applicant before: Sanyi Heavy Industry Co., Ltd. |
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