CN202480775U - Four-shaft automobile chassis and automobile crane with same - Google Patents
Four-shaft automobile chassis and automobile crane with same Download PDFInfo
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- CN202480775U CN202480775U CN2011205695418U CN201120569541U CN202480775U CN 202480775 U CN202480775 U CN 202480775U CN 2011205695418 U CN2011205695418 U CN 2011205695418U CN 201120569541 U CN201120569541 U CN 201120569541U CN 202480775 U CN202480775 U CN 202480775U
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Abstract
The utility model discloses a four-shaft automobile chassis which is provided with four wheel shafts, a front fixed support leg and a rear fixed support leg, wherein the first wheel shaft is arranged at the front side of the front fixed support leg; the second wheel shaft, the third wheel shaft and the fourth wheel shaft are arranged between the front fixed support leg and the rear fixed support leg; the first wheel shaft and the fourth wheel shaft are steering shafts, and the second wheel shaft and the third wheel shaft are driving shafts; preferably, the first wheel shaft is driven to steer by adopting a mechanical steering device and a steering power-assisting device; and the fourth wheel shaft is driven to steer by adopting a following power-assisting device. The four-shaft automobile chassis provided by the utility model can effectively balance the working load of each shaft, thus being capable of improving the transition operation while improving the bearing capacity of the whole machine. On the basis, the utility model also provides a four-shaft automobile crane adopting the chassis.
Description
Technical field
The utility model relates to a kind of industrial wheeled equipment, is specifically related to a kind of eight-wheeler chassis and has the car hosit on this chassis.
Background technology
The eight-wheeler chassis has through performance and transition performance preferably, in polytype construction machinery and equipment, has obtained using widely.For example, hoisting crane, elevating fire truck etc.See also Fig. 1 and Fig. 2, wherein, Fig. 1 shows the integral structure front view of existing eight-wheeler hoisting crane, and Fig. 2 shows shown in Fig. 1 the birds-eye view that four hoisting crane chassis turn to, axle drive shaft is arranged.
As depicted in figs. 1 and 2, its hoisting operation partly links to each other with car chassis through the turntable of control cabin below, and Crane Truck Chassis is by four axle support, and wherein, one, two is positioned at vehicle front, and three, four are positioned at rear vehicle end; Wherein, one, two as steering shaft; Three, four as axle drive shaft.In theory, four wheel shaft assembly charge material amounts in this scheme can reach 46 tons, and front axle (i.e. one, two steering shafts) is that single tire arranges that every bearing charge material amount can reach 10 tons, and rear axle (promptly three, 4 wheel driven moving axis) is the twins layout, and every bearing charge material amount can reach 13 tons.
But, based on the crane job characteristic requirements, must behind turntable, articulate the balance weight of several tons of weights, make and move after the car load center of gravity, thereby it is not enough to cause front axle to carry, the phenomenon of rear axle overload.That is to say that in fact existing four hoisting cranes can't realize carrying 46 tons.
Further, because that the rear axle of existing car chassis carries is bigger than normal, can't normally set out on a journey by the restriction of existing traffic law and go; Therefore, in actual use, the user needs the method for disengaging section or whole counterweights to solve.Yet; Though disengaging section or whole counterweight can solve the problem of vehicle rear axle overload, hoisting operation needs frequent change operation place mostly, frequently counterweight is dismantled, is transported and installs; Have a strong impact on hoisting operation efficient, caused the significant wastage of human and material resources simultaneously.
In view of this, demanding urgently looking for another way is optimized design to the eight-wheeler chassis, to give full play to each bearing loading capability, improves the complete machine load-carrying capacity on eight-wheeler chassis.
The utility model content
To above-mentioned defective; The technical matters that the utility model solves is, a kind of eight-wheeler chassis of structure optimization is provided, with each working load of active balance; Thereby when improving eight-wheeler chassis complete machine load-carrying capacity, further improved the transition operating efficiency.On this basis, the utility model also provides the eight-wheeler hoisting crane on this chassis of a kind of application.
The eight-wheeler chassis that the utility model provides has four wheel shafts and forward and backward fixed supporting leg; First wheel shaft is arranged on preceding fixed supporting leg front side, and second, third and four-wheel axle are arranged between said preceding fixed supporting leg and the back fixed supporting leg; Wherein, said first, four-wheel axle is a steering shaft, and said second, third wheel shaft is an axle drive shaft.
Preferably, said first wheel shaft adopts mechanical steering device and power steering device to drive and turns to, and said four-wheel axle adopts the servo-actuated work-saving device to drive and turns to.
Preferably, said mechanical steering device comprise the steering drop arm that is arranged on the steering booster, be arranged on the axle steer joint arm on first wheel shaft and be hinged on steering drop arm and axle steer joint arm between pull bar; The cylinder bar and the said steering drop arm of the active servo cylinder of said power steering device are hinged, and the cylinder bar of the servo-actuated servo cylinder of said servo-actuated work-saving device is hinged with the four axles steer joint arm that is arranged on the four-wheel axle.
Preferably; Said active servo cylinder and servo-actuated servo cylinder all are configured to: its cylinder barrel is divided into two relatively independent epitrochoidal chambers by dividing plate; Its piston has two piston bodies that place two epitrochoidal chambers respectively, and two piston bodies are divided into two sub-epitrochoidal chambers by connecting rod connection and each epitrochoidal chamber of being installed on the said dividing plate by the respective pistons body; Have first hydraulic fluid port and second hydraulic fluid port with the sub-epitrochoidal chamber of piston rod bonded assembly piston body both sides, the sub-epitrochoidal chamber of another piston body both sides has the 3rd hydraulic fluid port and the 4th hydraulic fluid port.
Preferably, first hydraulic fluid port of said active servo cylinder and the 4th hydraulic fluid port are communicated with two actuator ports of steering booster respectively, its second hydraulic fluid port and the 3rd hydraulic fluid port be communicated with first hydraulic fluid port and second hydraulic fluid port of said servo-actuated servo cylinder respectively; The 3rd hydraulic fluid port of said servo-actuated servo cylinder and the 4th hydraulic fluid port are communicated with.
Preferably, have between second hydraulic fluid port of said active power-assisted oil cylinder and the 3rd hydraulic fluid port by conducting of on-off valve control system or the non-conduction dead branch road of four shaft locks.
Preferably, said switch valve is specially normally closed solenoid valve.
Preferably, the 3rd hydraulic fluid port of said servo-actuated servo cylinder and the 4th hydraulic fluid port are communicated with the accumulation of energy branch road that pressure oil liquid is provided by energy storage, and said accumulation of energy branch road passes through second hydraulic fluid port and the unidirectional conducting of the 3rd hydraulic fluid port of two check valves and said active power-assisted oil cylinder respectively.
Preferably, two check valves parallel connection respectively are provided with by pass valve, and each by pass valve and corresponding said check valve oppositely be provided with, and the setting pressure of said by pass valve is higher than the response pressure of respective one-way valve.
The eight-wheeler hoisting crane that the utility model provides comprises car chassis and places the actuating unit of getting on the bus on the car chassis; Said car chassis is specially foregoing eight-wheeler chassis.
The eight-wheeler chassis that the utility model provides reaches the purpose of balance axle load through the set-up mode that position and steering shaft and axle drive shaft are set of adjustment axletree.First wheel shaft of this programme is arranged on preceding fixed supporting leg front side, and second, third and four-wheel axle are arranged between preceding fixed supporting leg and the back fixed supporting leg; Wherein, first, the four-wheel axle is steering shaft, second, third wheel shaft is an axle drive shaft.So be provided with, owing between preceding fixed supporting leg and back fixed supporting leg, be provided with three axletrees, total load-carrying capacity of this group axle significantly improves, and makes the load-carrying capacity at whole chassis rear improve greatly; In addition, reasonably distribution of axle load has reduced the probability of tyre explosion, the safety that has improved vehicle '.Simultaneously; Effective raising based on whole bearing capability; Use the hoisting crane on this chassis and when converting field, no longer need remove machine parts on counterweight etc.; Loaded down with trivial details and the time of frequent dismounting counterweight, the waste of manpower when having avoided transition, thus mode of operation can comparatively fast be got into, further improved the complete machine operating efficiency.
In the preferred version of the utility model, first wheel shaft adopts mechanical steering device and power steering device to drive and turns to, and the four-wheel axle adopts the servo-actuated work-saving device to drive and turns to.Particularly, the cylinder bar and the steering drop arm of the active servo cylinder of power steering device are hinged, and steering drop arm links to each other with track arm on the primary shaft through pull bar, realize corresponding steering operation to control primary shaft according to the steering command of chaufeur; The cylinder bar of the servo-actuated servo cylinder of servo-actuated work-saving device is hinged with the four axles steer joint arm that is arranged on the four-wheel axle, realizes that the four-wheel axle turns to according to steering command synchronously.So be provided with, the handling maneuver of vehicle is reliably accomplished in two combineds action of one side, simultaneously, greatly reduces the manipulation strength of chaufeur, has better operability.
Another preferred version of the utility model is to initiatively servo cylinder and servo-actuated servo cylinder have been done further optimization; Its cylinder barrel is divided into two relatively independent epitrochoidal chambers by dividing plate; And each epitrochoidal chamber is separated into two sub-epitrochoidal chambers by cooresponding piston body, and is simple in structure, reasonable in design; Wherein, Initiatively servo cylinder can be set up the oil circuit connected relation through the sub-epitrochoidal chamber of sub-epitrochoidal chamber and servo-actuated servo cylinder; Satisfying under the prerequisite of basic lag function; Can further optimize the element and the pipeline in follow-up control loop and arrange, shared assembly space is less, is convenient to carry out the general layout of complete machine more.
In the another preferred version of the utility model; Between second hydraulic fluid port of active power-assisted oil cylinder and the 3rd hydraulic fluid port, have, promptly between two actuator ports of the output follow-up control pressure signal of active power-assisted oil cylinder, be parallel with switch valve by conducting of on-off valve control system or the non-conduction dead branch road of four shaft locks.So be provided with; When the vehicle high-speed cruising is on straight road surface; Four small turning to all can be caused vehicle whipping phenomenon, thereby brings very big danger to vehicle ', for fear of the generation of this phenomenon; Regulate switch valve under can running at high speed operating mode on straight road surface and be positioned at open mode, make the dead branch road conducting of residing four shaft locks.In the time, need carry out locked to four.Like this; Along with the rotation of bearing circle, the steering hydraulic oil that flows out from deflector can be in servo-actuated work two chambeies of active servo cylinder servo-actuated work two chambeies and servo-actuated servo cylinder free-flowing, thereby can not form pressure output at four axle steer hydraulic circuits; Promptly; The servo-actuated servo cylinder of this moment non-constant with crossing two cavity pressures of working, and then four servo-actuateds can not appear when an axle steer, can evade the hidden danger that vehicle whipping phenomenon causes fully.
The eight-wheeler chassis that the utility model provides is specially adapted to car hosit applicable to industrial wheeled equipment.
Description of drawings
Fig. 1 is the integral structure front view of existing a kind of eight-wheeler hoisting crane;
Fig. 2 shows shown in Fig. 1 the birds-eye view that four hoisting crane chassis turn to, axle drive shaft is arranged;
The birds-eye view on the said eight-wheeler of specific embodiment chassis among Fig. 3;
Fig. 4 is the front view of four assembly relations on chassis shown in Fig. 3;
Fig. 5 is that the A of drive axle shown in Fig. 4 is to view;
Fig. 6 is the fundamental diagram of the said eight-wheeler of specific embodiment chassis steering swivel system;
Fig. 7 is the structural representation of the said a kind of servo cylinder of the specific embodiment;
Fig. 8 is the principle schematic of the said steering swivel system of the specific embodiment under the dead operating mode of four shaft locks;
Fig. 9 is the principle schematic of the said steering swivel system of the specific embodiment under the right steering operating mode;
Figure 10 is the principle schematic of the said steering swivel system of the specific embodiment under the left steering operating mode.
Among Fig. 3-Figure 10:
Before fixed supporting leg 10, back fixed supporting leg 20, first wheel shaft 30, axle steer joint arm 31, second wheel shaft 40, third round axle 50, four-wheel axle 60, four axles steer joint arm 61, driving engine 70, change speed gear box 80, first section transmission shaft 91, axle drive shaft 92, flange 93;
The specific embodiment
The core of the utility model is to provide a kind of eight-wheeler chassis applicable to all kinds of industrial wheeled equipments; This chassis can realize that through structure optimization each work plants the active balance of lotus; On the basis of improving eight-wheeler chassis complete machine load-carrying capacity, can further improve the transition operating efficiency.Specify this embodiment below in conjunction with Figure of description.
Be without loss of generality, this embodiment specifies as main body with the eight-wheeler hoisting crane.
Identical with prior art; This car hosit has the eight-wheeler chassis and is arranged on the functional components such as the actuating unit of getting on the bus on the chassis frame, for example, is articulated in the anterior Lifting device of vehicle frame; Be used to control the winding plant of the upper and lower displacement of suspension hook, be used to luffing mechanism of adjusting the arm attitude etc.Need to prove, because the above-mentioned functions parts can adopt existing techniques in realizing, so this paper repeats no more.For seeing the eight-wheeler chassis of this hoisting crane of explanation for details, see also Fig. 3 and Fig. 4, wherein, Fig. 3 is the birds-eye view on the said eight-wheeler of this embodiment chassis, Fig. 4 is the front view of four assembly relations on chassis shown in Fig. 3.
In conjunction with Fig. 3 and shown in Figure 4, fixed supporting leg 10, back fixed supporting leg 20 and four wheel shafts before the vehicle frame on this eight-wheeler chassis below is provided with; Wherein, first wheel shaft 30 is arranged on preceding fixed supporting leg 10 front sides, before second wheel shaft 40, third round axle 50 and four-wheel axle 60 are arranged between fixed supporting leg 10 and the back fixed supporting leg 20; And first wheel shaft 30 and four-wheel axle 60 are steering shaft, and second wheel shaft 40 is an axle drive shaft with third round axle 50.Owing to be provided with three axletrees between preceding fixed supporting leg 10 and the back fixed supporting leg 20, make the load-carrying capacity at whole chassis rear improve greatly; Simultaneously,, no longer need remove last machine parts such as counterweight during converting field based on effective raising of whole bearing capability, the loaded down with trivial details and time of frequent dismounting counterweight, the waste of manpower when having avoided transition, thus can comparatively fast get into mode of operation.In addition, rational distribution of axle load can also reduce the probability of tyre explosion.Usually, the center of gravity of getting on the bus is positioned at the car body middle part, so second wheel shaft 40 can be set to the twins axle drive shaft with third round axle 50, first wheel shaft 30 and four-wheel axle 60 are single tire steering shaft.
In addition, in this programme second wheel shaft 40 is set to axle drive shaft with third round axle 50, thus change speed gear box 80 mouths and axle drive shaft 92 input end close together, the limitation in height of fixed supporting leg 10 before receiving, driving engine 70, change speed gear box 80 highly all can't further reduce.For this reason, the input of axle drive shaft, output flange 93 all adopt high-order centered (flange center's line overlaps with vehicle centre-line), can strengthen axle drive shaft input, output flange 93 elevations angle simultaneously, i.e. the angle β of input, output flange 93 and horizontal surface.Please combine Fig. 4 and shown in Figure 5 in the lump, wherein, Fig. 5 is that the A of drive axle shown in Fig. 4 is to view.So be provided with; Can be so that be arranged in the small range with the angle of first section transmission shaft 91 of change speed gear box 80 bonded assemblys; Satisfy the operating needs of change speed gear box on the one hand, guarantee that on the other hand driveline vibrations remains in the reasonable range, improve the working stability of car load.
In addition, in two steering shafts in this programme, first wheel shaft 30 adopts mechanical steering device and power steering device to drive and realizes handling maneuver, and four-wheel axle 60 adopts the driving of servo-actuated work-saving device to realize handling maneuver.Specifically see also Fig. 6, what this illustrated this eight-wheeler chassis turns to the control scheme drawing.
This mechanical steering device is equally from bearing circle 1 output initial steer operation torque; Through being arranged on the steering drop arm 4 on the steering booster 2 and being hinged on this steering drop arm 4 and being arranged on the pull bar 3 between the axle steer joint arm 31 on first wheel shaft 30, realize the output of mechanical steering; Simultaneously, the middle part of the active servo cylinder 5 cylinder bars of power steering device and steering drop arm 4 is hinged.Certainly, also can be according to the needs of general layout, the hinge between active servo cylinder 5 and the steering drop arm 4 is arranged on the hinge below between pull bar 3 and the steering drop arm 4, transmit steering torque to the first wheel shaft 30 synchronously with power-assisted and all can as long as can satisfy machinery.Correspondingly, the cylinder bar of the servo-actuated servo cylinder 6 of servo-actuated work-saving device is hinged with the four axles steer joint arm 61 that is arranged on the four-wheel axle 60, turns to synchronously to drive four-wheel axle 60.
Should be appreciated that steering booster 2 and aforementioned active servo cylinder 5, servo-actuated servo cylinder 6 can adopt existing servo cylinder to realize power-steering basic function, those of ordinary skills can realize fully that based on prior art this paper repeats no more.Further, this programme provides the servo cylinder structure of further optimization.Like Fig. 6 and shown in Figure 7, wherein, Fig. 7 is the structural representation of the said a kind of servo cylinder of this embodiment.
As shown in Figure 7; The cylinder barrel 71 of this servo cylinder is divided into two relatively independent epitrochoidal chambers by dividing plate 72; Its piston has two piston bodies 73 that place two epitrochoidal chambers respectively; And two piston bodies 73 are connected by the connecting rod 74 that is installed on the dividing plate 72, and simultaneously, each epitrochoidal chamber is divided into two sub-epitrochoidal chambers by respective pistons body 73; Have first hydraulic fluid port and second hydraulic fluid port with the sub-epitrochoidal chamber of piston rod 75 bonded assembly piston bodies 73 both sides, the sub-epitrochoidal chamber of another piston body 73 both sides has the 3rd hydraulic fluid port and the 4th hydraulic fluid port.In this programme, initiatively servo cylinder 5 and servo-actuated servo cylinder 6 are all configurable becomes the servo cylinder shown in Fig. 7.Wherein, Initiatively servo cylinder 5 can be set up the oil circuit connected relation through the sub-epitrochoidal chamber of sub-epitrochoidal chamber and servo-actuated servo cylinder 6; Satisfying under the prerequisite of basic lag function; Can further optimize the element and the pipeline in follow-up control loop and arrange, shared assembly space is less, is convenient to carry out the general layout of complete machine more.
Particularly, initiatively first hydraulic fluid port and the 4th hydraulic fluid port of servo cylinder 5 are communicated with two actuator ports of steering booster 2 respectively, and initiatively second hydraulic fluid port and the 3rd hydraulic fluid port of servo cylinder 5 are communicated with first hydraulic fluid port and second hydraulic fluid port of servo-actuated servo cylinder 6 respectively; And the 3rd hydraulic fluid port of servo-actuated servo cylinder 6 and the 4th hydraulic fluid port are communicated with.
In the working process, power steerig pump 11 converts the low pressure steering hydraulic oil in the fuel tank 12 into high pressure oil, and sends in the steering booster 2, and steering booster 2 inside have the change-over valve (not shown) of connecting different circuit with the difference of bearing circle 1 rotation direction.With the vehicle right steering is its principle of work of example summary; At first; The right bearing circle 1 of beating of chaufeur, this moment, axle steer joint arm 31 back pendulum are put and driven to steering drop arm 4 after under the mechanical force of steering booster 2 outputs, and promoting initiatively from the steering hydraulic oil that turns to servo-unit 2 to come out simultaneously, the piston of servo cylinder 5 moves to right; Its piston rod drives steering drop arm 4 back pendulum, plays the effect of power-assisted first wheel shaft 30 right steerings; Meanwhile, the steering hydraulic oil that comes out from servo cylinder 5 second hydraulic fluid ports initiatively flows to first hydraulic fluid port of servo-actuated servo cylinder 6, and the piston that promotes servo-actuated servo cylinder 6 moves to left, and its piston rod drives four-wheel axles 60 left steerings through four axles steer joint arm 61.So far, under the combined action of 30 right-hand rotations of first wheel shaft and 60 left-hand rotations of four-wheel axle, vehicle is accomplished the right steering function.
Among this paper, the nouns of locality such as employed front, rear, left and right be with the visual angle of the chaufeur that is positioned at steering position as the benchmark definition, obviously, the application of relative orientations arc speech does not constitute the restriction to this programme protection domain.
As everyone knows; When the vehicle high-speed cruising was on straight road surface, small improper the turning to that is positioned at the four-wheel axle 60 at rear all can be caused vehicle whipping phenomenon, thereby brings very big danger to vehicle '; Generation for fear of this phenomenon; This programme provides lockable function to four-wheel axle 60, four-wheel axle 60 is carried out when on straight road surface, running at high speed lockedly, evades above-mentioned risk.
As shown in the figure; Initiatively have between second hydraulic fluid port of power-assisted oil cylinder 5 and the 3rd hydraulic fluid port by switch valve 13 control conducting or the non-conduction dead branch roads of four shaft locks, i.e. this switch valve 13 of parallel connection between two actuator ports of the output follow-up control pressure signal of active power-assisted oil cylinder 5; In fact, because initiatively second hydraulic fluid port and the 3rd hydraulic fluid port of servo cylinder 5 are communicated with first hydraulic fluid port and second hydraulic fluid port of servo-actuated servo cylinder 6 respectively, therefore, this switch valve 13 also is equivalent to be connected in parallel between first hydraulic fluid port and second hydraulic fluid port of servo-actuated servo cylinder 6.Preferably, switch valve 13 is specially normally closed solenoid valve.
In addition, the 3rd hydraulic fluid port of servo-actuated servo cylinder 6 and the 4th hydraulic fluid port are communicated with the accumulation of energy branch road of pressure oil liquid is provided by energy storage 14, perhaps discharge the pressure energy in the working process to store.And the accumulation of energy branch road is through first check valve 15 and the initiatively unidirectional conducting of second hydraulic fluid port of power-assisted oil cylinder 5, through second check valve 16 and the initiatively unidirectional conducting of the 3rd hydraulic fluid port of power-assisted oil cylinder 5; In like manner; Because initiatively second hydraulic fluid port and the 3rd hydraulic fluid port of servo cylinder 5 are communicated with first hydraulic fluid port and second hydraulic fluid port of servo-actuated servo cylinder 6 respectively; Therefore, the unidirectional conducting relation set up of two check valves is formed between first hydraulic fluid port and second hydraulic fluid port of accumulation of energy branch road and servo-actuated servo cylinder 6 equally.
Further, for improving the working stability of whole steering control system, the by pass valve with the parallelly connected setting of two check valves difference can be set; As shown in the figure; First by pass valve 17 is parallelly connected with first check valve 15, and second by pass valve 18 is parallelly connected with second check valve 16, and each by pass valve oppositely is provided with corresponding check valve; And the setting pressure of by pass valve all is higher than the response pressure of respective one-way valve, to guarantee the preferred conducting of check valve place branch road.
Below in conjunction with several kinds of representative its principle of work of operating mode brief description.
1) initial operating mode
As shown in Figure 6; Energy storage 14 place branch roads are injected the high pressure oil (system pressure when this pressure is far smaller than and turns to) of certain pressure; When this accumulation of energy branch road pressure surpassed the response pressure of first check valve 15, second check valve 16, two one-way valve opens then were to four chamber oilings of sub-epitrochoidal chamber G, H of sub-epitrochoidal chamber D, E and the servo-actuated servo cylinder 6 of active servo cylinder 5; When pressure reaches setting value, can finish oiling.Obviously, D, E, G, H, I, six sub-epitrochoidal chambers of J have identical initial pressure at this moment.
Need to prove that I in the servo-actuated servo cylinder 6, J two cavity pressures are greater than in D, E two chambeies and the servo-actuated servo cylinder 6 in the active servo cylinder 5 when G, H two cavity pressures, promptly to its repairing; With switch valve 13 whether electric it doesn't matter.Certainly, switch valve 13 is in the no power state under the normality, and promptly two ends are obstructed.
2) the dead operating mode of four shaft locks
When four-wheel axle 60 needs are locked, need open switch valve 13, connect switch valve 13 place oil circuits, as shown in Figure 8.
Because after switch valve 13 was opened, its place oil circuit was switched on; Therefore, along with the rotation of bearing circle 1, steering hydraulic oil can be in two sub-epitrochoidal chambers of G, the H of two sub-epitrochoidal chambers of D, the E of active servo cylinder 5 and servo-actuated servo cylinder 6 free-flowing, thereby four axle steer hydraulic circuits have formed not pressure output.Under this state; The pressure of the I of servo-actuated servo cylinder 6, two sub-epitrochoidal chambers of J is constant; That is to say that first wheel shaft 30 turns to and can not cause four-wheel axle 60 to turn to, four-wheel axle 60 keeps the meta lock-out state under the pressure of D, E, G, H, I, six sub-epitrochoidal chambers of J.
3) right steering operating mode
Power steerig pump 11 converts the steering hydraulic oil in the fuel tank 12 into high pressure oil, and sends in the steering booster 2.As shown in Figure 9, when vehicle need be turned right, switch valve 13 was in normally off.The right bearing circle 1 of beating of chaufeur, this moment, the A chamber of steering booster 2 produced high pressure oil, and steering drop arm 4 promotes axle steer joint arm 31 backs and puts, 30 right-hand rotations of first wheel shaft at the C chamber high pressure oil effect of the A chamber of steering booster 2 and servo cylinder 5 initiatively back pendulum down; Simultaneously, initiatively the C chamber high pressure oil of servo cylinder 5 promotes its D chamber and also forms the G chamber that high pressure oil passes to promotion servo-actuated servo cylinder 6, and then drives four-wheel axle 60 through moving to left of its piston rod.So far, under the combined action of 30 right-hand rotations of first wheel shaft and 60 left-hand rotations of four-wheel axle, vehicle is accomplished the right steering function.
Right steering power is big or when suddenling change load, and the steering hydraulic oil pressure that flows out from servo cylinder 5 initiatively is also bigger, when pressure surpasses the oil pressure relief that first by pass valve 17 sets; 17 overflows of first by pass valve; And steering hydraulic oil is pushed second check valve 16 open, and the steering hydraulic oil that flows back to servo-actuated servo cylinder 6 confluxes, to guarantee that servo cylinder is advanced, the oil return line difference of pressure stable; Avoid power-assisted to cross ambassador's chaufeur and lose feel, cause the danger of ovdersteering.
4) left steering operating mode
Shown in figure 10, when vehicle need turn left, switch valve 13 was in normally off.Bearing circle 1 is beaten on a chaufeur left side, and this moment, the B chamber of steering booster 2 produced high pressure oil, and steering drop arm 4 is forward swing under the F chamber high pressure oil effect of the B chamber of steering booster 2 and servo cylinder 5 initiatively, promotes axle steer joint arm 31 forward swings, 30 right-hand rotations of first wheel shaft; Simultaneously, initiatively the F chamber high pressure oil of servo cylinder 5 promotes its E chamber and also forms the H chamber that high pressure oil passes to servo-actuated servo cylinder 6, and then drives 60 right-hand rotations of four-wheel axle through moving to right of its piston rod.So far, under the combined action of 30 left-hand rotations of first wheel shaft and 60 right-hand rotations of four-wheel axle, vehicle is accomplished the right steering function.
Leftward steering force is big or when suddenling change load, and the steering hydraulic oil pressure that flows out from servo cylinder 5 initiatively is also bigger, when pressure surpasses the oil pressure relief that second by pass valve 18 sets; 18 overflows of second by pass valve; And steering hydraulic oil is pushed first check valve 15 open, and the steering hydraulic oil that flows back to servo-actuated servo cylinder 6 confluxes, to guarantee that servo cylinder is advanced, the oil return line difference of pressure stable; Avoid power-assisted to cross ambassador's chaufeur and lose feel, cause the danger of ovdersteering.
Except that the said four Fu implementations of previous embodiment, also can adopt machineries add hydraulic pressure servo-steering mode, four-wheel axle 60 adopts electric-hydraulic proportions to turn to master mode to realize one, four axles steer at first wheel shaft 30.Four-wheel axle 60 rotates according to the steering angle information that first wheel shaft, 30 angular transducers receive by a certain percentage, can control separately and realize the active steering function.Certainly, this scheme system complex, cost height, reliability is low slightly.
The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.
Claims (10)
1. the eight-wheeler chassis has four wheel shafts and forward and backward fixed supporting leg; It is characterized in that first wheel shaft is arranged on preceding fixed supporting leg front side, second, third and four-wheel axle are arranged between said preceding fixed supporting leg and the back fixed supporting leg; Wherein, said first, four-wheel axle is a steering shaft, and said second, third wheel shaft is an axle drive shaft.
2. eight-wheeler according to claim 1 chassis is characterized in that, said first wheel shaft adopts mechanical steering device and power steering device to drive and turns to, and said four-wheel axle adopts the servo-actuated work-saving device to drive and turns to.
3. eight-wheeler according to claim 2 chassis; It is characterized in that, said mechanical steering device comprise the steering drop arm that is arranged on the steering booster, be arranged on the axle steer joint arm on first wheel shaft and be hinged on steering drop arm and axle steer joint arm between pull bar; The cylinder bar and the said steering drop arm of the active servo cylinder of said power steering device are hinged, and the cylinder bar of the servo-actuated servo cylinder of said servo-actuated work-saving device is hinged with the four axles steer joint arm that is arranged on the four-wheel axle.
4. eight-wheeler according to claim 3 chassis; It is characterized in that; Said active servo cylinder and servo-actuated servo cylinder all are configured to: its cylinder barrel is divided into two relatively independent epitrochoidal chambers by dividing plate; Its piston has two piston bodies that place two epitrochoidal chambers respectively, and two piston bodies are divided into two sub-epitrochoidal chambers by connecting rod connection and each epitrochoidal chamber of being installed on the said dividing plate by the respective pistons body; Have first hydraulic fluid port and second hydraulic fluid port with the sub-epitrochoidal chamber of piston rod bonded assembly piston body both sides, the sub-epitrochoidal chamber of another piston body both sides has the 3rd hydraulic fluid port and the 4th hydraulic fluid port.
5. eight-wheeler according to claim 4 chassis; It is characterized in that first hydraulic fluid port of said active servo cylinder and the 4th hydraulic fluid port are communicated with two actuator ports of steering booster respectively, its second hydraulic fluid port and the 3rd hydraulic fluid port are communicated with first hydraulic fluid port and second hydraulic fluid port of said servo-actuated servo cylinder respectively; The 3rd hydraulic fluid port of said servo-actuated servo cylinder and the 4th hydraulic fluid port are communicated with.
6. eight-wheeler according to claim 5 chassis is characterized in that, has between second hydraulic fluid port of said active power-assisted oil cylinder and the 3rd hydraulic fluid port by conducting of on-off valve control system or the non-conduction dead branch road of four shaft locks.
7. eight-wheeler according to claim 6 chassis is characterized in that said switch valve is specially normally closed solenoid valve.
8. according to each described eight-wheeler chassis in the claim 4 to 6; It is characterized in that; The 3rd hydraulic fluid port of said servo-actuated servo cylinder and the 4th hydraulic fluid port are communicated with the accumulation of energy branch road that pressure oil liquid is provided by energy storage, and said accumulation of energy branch road passes through second hydraulic fluid port and the unidirectional conducting of the 3rd hydraulic fluid port of two check valves and said active power-assisted oil cylinder respectively.
9. eight-wheeler according to claim 8 chassis; It is characterized in that; Two check valves parallel connection respectively are provided with by pass valve, and each by pass valve and corresponding said check valve oppositely be provided with, and the setting pressure of said by pass valve is higher than the response pressure of respective one-way valve.
10. the eight-wheeler hoisting crane comprises car chassis and places the actuating unit of getting on the bus on the car chassis; It is characterized in that said car chassis is concrete like each described eight-wheeler chassis in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205695418U CN202480775U (en) | 2011-12-30 | 2011-12-30 | Four-shaft automobile chassis and automobile crane with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205695418U CN202480775U (en) | 2011-12-30 | 2011-12-30 | Four-shaft automobile chassis and automobile crane with same |
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| Publication Number | Publication Date |
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| CN202480775U true CN202480775U (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011205695418U Expired - Lifetime CN202480775U (en) | 2011-12-30 | 2011-12-30 | Four-shaft automobile chassis and automobile crane with same |
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| CN (1) | CN202480775U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424001A (en) * | 2011-12-30 | 2012-04-25 | 徐州重型机械有限公司 | Four-axle automobile chassis and automobile crane with same |
| CN104176118A (en) * | 2014-08-15 | 2014-12-03 | 徐州重型机械有限公司 | Automobile crane and cylinder-controlled steering system thereof |
| CN105015617A (en) * | 2015-07-08 | 2015-11-04 | 武汉理工大学 | Steering control method and device for rear wheels of commercial vehicle |
| CN105050934A (en) * | 2012-12-03 | 2015-11-11 | 蓬塞有限公司 | Crane |
| CN105584526A (en) * | 2016-03-09 | 2016-05-18 | 郑州精益达汽车零部件有限公司 | Steering system for eight-wheel four-axle passenger car |
| CN108045432A (en) * | 2018-01-16 | 2018-05-18 | 徐工集团工程机械有限公司 | Steering cylinder, hydraulic power-assist steering system turn to vehicle bridge and vehicle |
| CN114132117A (en) * | 2014-05-29 | 2022-03-04 | 马切桑工具及农业机械股份公司 | Steering system for four wheels of a sugarcane harvester |
-
2011
- 2011-12-30 CN CN2011205695418U patent/CN202480775U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424001A (en) * | 2011-12-30 | 2012-04-25 | 徐州重型机械有限公司 | Four-axle automobile chassis and automobile crane with same |
| CN102424001B (en) * | 2011-12-30 | 2014-05-14 | 徐州重型机械有限公司 | Four-axle automobile chassis and automobile crane with same |
| CN105050934A (en) * | 2012-12-03 | 2015-11-11 | 蓬塞有限公司 | Crane |
| CN114132117A (en) * | 2014-05-29 | 2022-03-04 | 马切桑工具及农业机械股份公司 | Steering system for four wheels of a sugarcane harvester |
| CN104176118A (en) * | 2014-08-15 | 2014-12-03 | 徐州重型机械有限公司 | Automobile crane and cylinder-controlled steering system thereof |
| CN105015617A (en) * | 2015-07-08 | 2015-11-04 | 武汉理工大学 | Steering control method and device for rear wheels of commercial vehicle |
| CN105584526A (en) * | 2016-03-09 | 2016-05-18 | 郑州精益达汽车零部件有限公司 | Steering system for eight-wheel four-axle passenger car |
| CN108045432A (en) * | 2018-01-16 | 2018-05-18 | 徐工集团工程机械有限公司 | Steering cylinder, hydraulic power-assist steering system turn to vehicle bridge and vehicle |
| CN108045432B (en) * | 2018-01-16 | 2023-08-25 | 江苏徐工国重实验室科技有限公司 | Steering cylinder, hydraulic power steering system, steering axle and vehicle |
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Legal Events
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20121010 Effective date of abandoning: 20140514 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20121010 Effective date of abandoning: 20140514 |
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| RGAV | Abandon patent right to avoid regrant |