CN202923705U - Follow-up steering control system of multi-axle truck crane and multi-axle truck crane - Google Patents
Follow-up steering control system of multi-axle truck crane and multi-axle truck crane Download PDFInfo
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- CN202923705U CN202923705U CN 201220632877 CN201220632877U CN202923705U CN 202923705 U CN202923705 U CN 202923705U CN 201220632877 CN201220632877 CN 201220632877 CN 201220632877 U CN201220632877 U CN 201220632877U CN 202923705 U CN202923705 U CN 202923705U
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Abstract
The utility model provides a follow-up steering control system of a multi-axle truck crane and the multi-axle truck crane. In a steering state of the multi-axle truck crane, the output oil pressure of a first oil pressure output port is larger or less than that of a second oil pressure output port, a piston rod of a left steering hydraulic oil cylinder (8) is lengthened and a piston rod of a right steering hydraulic oil cylinder (13) is shortened, or the piston rod of the left steering hydraulic oil cylinder (8) is shortened and the piston rod of the right steering hydraulic oil cylinder (13) is lengthened, and a left rear steering wheel (11) and a right rear steering wheel (15) are enabled to turn left or right by driving a first steering knuckle arm (17) and a second steering knuckle arm (18). According to the follow-up steering control system of the multi-axle truck crane, provided by the utility model, a hydraulically-controlled follow-up steering control method is provided for a vehicle which is provided with an active steering rear axle, the locomotive flexibility of low-speed steering and the curve passing ability of the multi-axle truck crane are increased, and the drifting phenomenon which probably happens during high-speed driving can be avoided.
Description
Technical field
The utility model relates to motor turning control technology field, relates in particular to a kind of follow-up steering control system and multi-wheeler hoisting crane of multi-wheeler hoisting crane.
Background technology
In recent years, along with construction, maintenance and the large-scale petrochemical of the new forms of energy projects such as more and more large-scale wind electricities, the demand of power plant construction, car hosit market has obtained significant progress.When satisfying that vehicle shifts in the short range place or low speed is turned to the requirement of maneuverability, bend carrying capacity, the car hosit with telescopic hoist boom or truss-like arm of producing at present generally has three even more axletrees, and wherein major part has at least the rear axle can active steering or follow-up steering.
For convenience of explanation, provide the profile schematic diagram of a kind of three full Terrain Cranes of axle, six axle car hosits.Fig. 1 is a kind of full Terrain Cranes that adopts oleo-pneumatic suspension, and Fig. 2 is for adopting the car hosit of plate spring suspension brackets.No matter for full Terrain Cranes or for car hosit, not only can travel on the building ground, and can travel on public way.Therefore, under the prerequisite that satisfies the vehicle maneuverability, for fear of the fault that causes because of independent rear axle steering system, the rear axle of all active steerings must all can be controlled.
For the car hosit of similar Fig. 1 and Fig. 2, can realize turning to of rear axle by mechanical steering pull bar system or electro-hydraulic steering hardware.For example, Fig. 3 is a kind of realization example that full Terrain Cranes shown in Figure 1 is used steering swivel system, and Fig. 4 is a kind of realization example that car hosit shown in Figure 2 is used steering swivel system.In Fig. 3, the mechanical pull bar of having cancelled with front axle contacts.In Fig. 4, the transfer of power and turn to shift and be delivered to six axles by a plurality of four-bar linkages from an axle, and then realize turning to of six axles.
When full Terrain Cranes shown in Figure 1 adopted steering swivel system shown in Figure 3, during normal road driving, rear axle remained on midway location by the locking device that turns on it, guarantees the rear axle straight-line travelling.Start rear axle steering in short time when only shifting in little place.That is to say, steering technique shown in Figure 3, rear axle can not active steering.
When car hosit shown in Figure 2 adopted steering swivel system shown in Figure 4, rear axle was retrained by steering lever, can only follow the front axle counter steering.The shortcoming of steering swivel system shown in Figure 4 is: turn to four-bar linkage too much; The transmission of power, the transfer of divertical motion need to be looked concrete steering system stiffness and decide, and steering system stiffness is larger, and the transmission of power is faster, and rear axle steering is also fast; After using a period of time, wearing and tearing can appear in the ball end at steering track rod assembly two ends, and the gap increases, and strengthens the hysteresis of rear axle steering, also can bring to a certain extent the inordinate wear of tire.
Some are also arranged in the prior art about the automatically controlled steering swivel system of car hosit rear axle and the method for rear axle steering, but cost is too expensive, on the inapplicable car hosit that an active steering rear axle only arranged or full Terrain Cranes, or on the high car hosit of inapplicable speed of operation, therefore, need a kind of novel follow-up steering control system.
Summary of the invention
In view of this, a technical matters to be solved in the utility model is to provide a kind of follow-up steering control system of multi-wheeler hoisting crane, and the hydraulic efficiency gear that drives wheel steering is set on the active steering rear axle.
A kind of follow-up steering control system of multi-wheeler hoisting crane, described multi-wheeler hoisting crane comprises: active steering rear axle 9, be arranged on left back wheel flutter 11 and right back wheel flutter 15 on described active steering rear axle 9, control the first track arm 17 that described left back wheel flutter 11 turns to and control the second track arm 18 that described right back wheel flutter 15 turns to, and oil return circuit, it is characterized in that, described follow-up steering control system comprises: left-hand rotation hydraulic ram 8, right-hand rotation hydraulic ram 13 and the first control cock device 7; The piston rod of described left-hand rotation hydraulic ram 8 and cylinder body bottom are hinged with described active steering rear axle 9 and described the first track arm 17 respectively; The piston rod of described right-hand rotation hydraulic ram 13 and cylinder body bottom are hinged with described active steering rear axle 9 and the second track arm 18 respectively; The first oil pressure delivery port A of described the first control cock device 7 is connected with the rodless cavity of described left-hand rotation hydraulic ram 8, the rod chamber of described right-hand rotation hydraulic ram 13 respectively; The second oil pressure delivery port B of described the first control cock device 7 is connected with the rod chamber of described left-hand rotation hydraulic ram 8, the rodless cavity of described right-hand rotation hydraulic ram 13 respectively; Under described the first oil pressure delivery port A output high pressure and described the second oil pressure delivery port B and state that described oil return circuit communicates, the piston rod elongation of described left-hand rotation hydraulic ram 8 and the piston rod of described right-hand rotation hydraulic ram 13 shorten, and by driving described the first track arm 17 and the second track arm 18, described left back wheel flutter 11 and right back wheel flutter 15 are turned left; Described the first oil pressure delivery port A communicate with described oil return circuit and the state of described the second oil pressure delivery port B output high pressure under, the piston rod of described left-hand rotation hydraulic ram 8 shortens and the piston rod of described right-hand rotation hydraulic ram 13 extends, and by driving described the first track arm 17 and the second track arm 18, described left back wheel flutter 11 and right back wheel flutter 15 is turned right.
According to an embodiment of system of the present utility model, further, also comprise: meta locking hydraulic ram 10 and the second control cock device 12; Described meta locking hydraulic ram 10 comprises: be fixedly installed on meta locating piece 28 in cylinder body 21, be separately positioned on first piston 22 and second piston 29 of described meta locating piece 28 both sides; Wherein, described first piston 22 is captiveed joint with piston rod, by described first piston 22 and the second piston 29, the inner chamber of cylinder body 21 is separated into rod chamber 25, intermediate cavity 24 and rodless cavity 26, and, intermediate cavity 24 formed between described first piston 22 and the second piston 29; The piston rod 23 of described meta locking hydraulic ram 10 and cylinder body 21 bottoms are hinged with described active steering rear axle 9 and described the first track arm 17 or the second track arm 18 respectively; The 3rd oil pressure delivery port T2 of described the second control cock device 12 is connected with described intermediate cavity 24, the 4th oil pressure delivery port D is connected with rodless cavity 25 and the rod chamber 26 of described meta locking hydraulic ram 10 respectively; Wherein, described the 3rd oil pressure delivery port T2 communicates with described oil return circuit all the time; Under described multi-wheeler hoisting crane state to overtake, described the 4th oil pressure delivery port D output high pressure and described the 3rd oil pressure delivery port T2 communicate with described oil return circuit, and first piston 22 and the second piston 29 contact with the two ends of described meta locating piece 28 respectively.
According to an embodiment of system of the present utility model, further, under the state that described multi-wheeler hoisting crane turns to, described the 3rd oil pressure delivery port T2 and the 4th oil pressure delivery port D communicate with described oil return circuit; Under described multi-wheeler hoisting crane state to overtake, the output oil pressure of described the first oil pressure delivery port A and described the second oil pressure delivery port B communicate with described oil return circuit.
According to an embodiment of system of the present utility model, further, the cylinder body bottom of described left-hand rotation hydraulic ram 8 and described active steering rear axle 9 are hinged, and the piston rod of described left-hand rotation hydraulic ram 8 and described the first track arm 17 are hinged; The cylinder body bottom of described right-hand rotation hydraulic ram 13 and described active steering rear axle 9 are hinged, the piston rod of described right-hand rotation hydraulic ram 13 be connected track arm 18 and connect.
According to an embodiment of system of the present utility model, further, detect the pressure-detecting device 16 of the 4th oil pressure delivery port D oil pressure.
According to an embodiment of system of the present utility model, further, measure the vehicle speed detector device of described multi-wheeler crane running speed.
According to an embodiment of system of the present utility model, further, control each oil pressure delivery port output high pressure of described the first control cock device 7 and the second control cock device 12 or the control setup that communicates with described oil return circuit.
According to an embodiment of system of the present utility model, further, measure described multi-wheeler hoisting crane front axle steering angle the front-axle steering detecting device and measure the rear axle steering detecting device of described active steering rear axle 9 steering angles.
An embodiment according to system of the present utility model, further, detect that front axle mediates and the rear axle detecting device detects under the state that described active steering rear axle 9 mediates at minimum speed of a motor vehicle limit value, front axle detecting device that described vehicle speed detector device detects vehicle, described control setup is controlled described the 4th oil pressure delivery port D output high pressure and described the 3rd oil pressure delivery port T2 communicates with described oil return circuit.
A kind of multi-wheeler hoisting crane comprises the follow-up steering control system of multi-wheeler hoisting crane as above.
The follow-up steering control system of multi-wheeler hoisting crane of the present utility model and multi-wheeler hoisting crane, the hydraulic efficiency gear that drives wheel steering is set on the active steering rear axle, make and turn to flexibly, improve low speed rotation to maneuverability and bend carrying capacity, the whipping phenomenon that may occur when avoiding running at high speed.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of schematic diagram that adopts the full Terrain Cranes of oleo-pneumatic suspension of the prior art;
Fig. 2 is a kind of schematic diagram that adopts the car hosit of plate spring suspension brackets of the prior art;
Fig. 3 is the schematic diagram that the full Terrain Cranes in Fig. 1 is used steering swivel system;
Fig. 4 is the schematic diagram that the car hosit in Fig. 2 is used steering swivel system;
Fig. 5 is the schematic diagram according to an embodiment of the follow-up steering control system of multi-wheeler hoisting crane of the present utility model;
Fig. 6 is a schematic diagram according to the locking of the meta in an embodiment of the follow-up steering control system of multi-wheeler hoisting crane of the present utility model hydraulic ram;
Fig. 7 is a schematic diagram according to the control cock device in an embodiment of the follow-up steering control system of multi-wheeler hoisting crane of the present utility model.
The specific embodiment
With reference to the accompanying drawings the utility model is described more fully, exemplary embodiment of the present utility model wherein is described.Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.Below in conjunction with figure and embodiment, the technical solution of the utility model is carried out many-sided description.
The utility model provides a kind of follow-up steering control system of multi-wheeler hoisting crane, is used for solving having the car hosit of active steering rear axle to the needs of problems of maneuverability, bend carrying capacity, road-holding property.
Fig. 5 is the schematic diagram according to an embodiment of the follow-up steering control system of multi-wheeler hoisting crane of the present utility model; As shown in Figure 5: the multi-wheeler hoisting crane comprises an active steering rear axle 9, be arranged on left back wheel flutter 11 and right back wheel flutter 15 on active steering rear axle 9, control the first track arm 17 that left back wheel flutter 11 turns to and control the second track arm 18 that right back wheel flutter 15 turns to.
The follow-up steering control system of multi-wheeler hoisting crane comprises: left-hand rotation hydraulic ram 8, right-hand rotation hydraulic ram 13 and the first control cock device 7; The two ends of left-hand rotation hydraulic ram 8 are hinged with active steering rear axle 9 and the first track arm 17 respectively; The two ends of right-hand rotation hydraulic ram 13 are hinged with active steering rear axle 9 and the second track arm 18 respectively.According to an embodiment of the present utility model, also can adopt other connection mode, for example, weld, be threaded etc. with active steering rear axle 9 and the first track arm 17 respectively in the two ends of left-hand rotation hydraulic ram 8.
The first oil pressure delivery port A of the first control cock device 7 is connected with the rodless cavity of left-hand rotation hydraulic ram 8, the rod chamber of right-hand rotation hydraulic ram 13 respectively.The second oil pressure delivery port B of the first control cock device 7 is connected with the rod chamber of left-hand rotation hydraulic ram 8, the rodless cavity of right-hand rotation hydraulic ram 13 respectively.
Rod chamber in the utility model refers to the residing oil pocket of the piston rod in hydraulic ram, and rodless cavity refers to the oil pocket that there is no piston rod in hydraulic ram.
Under the state that the multi-wheeler hoisting crane turns to, the output oil pressure of the first oil pressure delivery port is greater than or less than the output oil pressure of the second oil pressure delivery port, the piston rod of the piston rod elongation of left-hand rotation hydraulic ram 8 and the piston rod shortening of right-hand rotation hydraulic ram 13 or left-hand rotation hydraulic ram 8 shortens and the piston rod of right-hand rotation hydraulic ram 13 extends, and makes left back wheel flutter 11 and right back wheel flutter 15 turn left or turn right by driving the first track arm 17 and the second track arm 18.
The multi-wheeler hoisting crane have one can active steering rear axle and be arranged on wheel flutter on rear axle, make to turn to flexibly.According to an embodiment of the present utility model, the multi-wheeler hoisting crane can have the rear axle of a plurality of active steerings, and the rear axle of a plurality of active steerings all has the ability of active steering.
Fig. 6 is a schematic diagram according to the locking of the meta in an embodiment of the follow-up steering control system of multi-wheeler hoisting crane of the present utility model hydraulic ram.
As shown in Figure 6, meta locking hydraulic ram 10 is the double-piston hydraulic oil cylinder, comprising: the meta locating piece 28, first piston 22 and the second piston 29 that arrange in cylinder body 25; First piston 22 and the second piston 29 are separately positioned on the both sides of meta locating piece 28, form intermediate cavity between first piston 22 and the second piston 27, and intermediate cavity communicates with the return oil system of follow-up steering control system.
By first piston 22 and the second piston 29, the inner chamber of cylinder body 21 is separated into rod chamber 25, intermediate cavity 24 and 26 3 parts of rodless cavity, piston rod 23 is the Step Shaft shape and major diameter is deployed in intermediate cavity, minor diameter is stretched out after passing successively first piston 22 and cylinder body upper end cover, is fixedly installed the meta locating piece 28 of tubulose on the inwall of intermediate cavity.
According to an embodiment of the present utility model, be set with intermediate piston 27 on the outer circumference surface of the major diameter part of piston rod 23, the length of intermediate piston 27 is more than or equal to the length of meta locating piece 28, the upper surface of the pars intermedia of the lower surface of intermediate piston 27 and the second piston 29 offsets, wherein, the pars intermedia upper surface of the second piston 29 arranges groove, and the lower surface of intermediate piston 27 contacts with groove and the peripheral part of the second piston 29 upper surfaces and the left side of meta locating piece 28 offset.
Reflux in meta chamber 24 welding system all the time, rod chamber 25 and rodless cavity 26 are by pressure oil circuit or the oil return circuit of corresponding oil-feed and oil return electromagnetic switch valve while connected system, when rod chamber 25 and rodless cavity 26 are all connected the system oil return oil circuit, when the meta locked cylinder was in released state, the external force pushing piston bar 23 that is applied on piston rod 23 stretched out or retracts.
When rod chamber 25, the rodless cavity 26 of meta locked cylinder communicates with the pressure oil circuit of system, and meta chamber 24 is when communicating with the oil return circuit of system, when the meta locked cylinder is in the lock state, at this moment, under the effect of pressure oil, first piston 22 is moved to the left until offset with meta locating piece 28, and the second piston 29 moves right under the effect of pressure oil, contact with at least one in intermediate piston 27 or meta locating piece 28, guaranteed that the wheel on corresponding steering shaft keeps straight-line travelling.
Position by adjusting meta locating piece 28 and the length of intermediate piston 27, the particular location in the time of can adjusting the locking of meta locked cylinder, and intermediate piston 28 and meta locating piece 28 are equivalent to provide the Dual positioning protection.
According to an embodiment of the present utility model, the follow-up steering control system comprises meta locking hydraulic ram 10 and the second control cock device 12; The piston rod 23 of meta locking hydraulic ram 10 and cylinder body 21 bottoms are hinged with active steering rear axle 9 and the first track arm 17 or the second track arm 18 respectively; The 3rd oil pressure delivery port T2 of the second control cock device 12 is connected with intermediate cavity 24, the 4th oil pressure delivery port D is connected with rodless cavity 25 and the rod chamber 26 of meta locking hydraulic ram 10 respectively; Wherein, the 3rd oil pressure delivery port T2 communicates with oil return circuit all the time; Under multi-wheeler hoisting crane state to overtake, the 4th oil pressure delivery port D output high pressure and the 3rd oil pressure delivery port T2 communicate with oil return circuit, and first piston 22 and the second piston 29 contact with the two ends of meta locating piece 28 respectively.
Under the state that the multi-wheeler hoisting crane turns to, the output oil pressure of the 3rd oil pressure delivery port T2, the 4th oil pressure delivery port D is identical, and all communicates with the return oil system of follow-up steering control system; Under multi-wheeler hoisting crane state to overtake, the output oil pressure of the first oil pressure delivery port A is identical with the output oil pressure of the second oil pressure delivery port B, and all communicates with the return oil system of follow-up steering control system; The 3rd oil pressure delivery port T2 and the 4th oil pressure delivery port D, and equal predefined threshold value.
According to an embodiment of the present utility model, arrange that at rear axle 9 two steering cylinders and one turn to the meta locked cylinder.When the rear axle active steering, the P mouth of the first control cock device 7 has high pressure fuel source to enter the steering cylinder of rear axle through A mouth or B mouth, the left/right rotation of realizing rear axle to.The P mouth of the second control cock device 12 is cut off; The fluid of T1 mouth, T2 mouth, three hydraulic fluid ports of D mouth circulates mutually, also communicates with the return oil system of hydrostatic steering system.
When rear axle kept straight-line travelling, the P mouth of the first control cock device 7 was cut off, and the fluid intercommunication of A mouth, B mouth, three hydraulic fluid ports of T mouth communicates with the return oil system of hydrostatic steering system.The pressure oil of oil pump output flows to the D mouth through the P mouth of the second control cock device 12, force the meta locked cylinder that turns to of rear axle to get back to midway location, when pressure-detecting device 16 detected the A mouth pressure and is about the pressure setting limit value, the P mouth was cut off, and the high pressure oil of D mouth is by the second control cock group 12 cut-offs; In addition, the T1 mouth communicates with the T2 mouth.
According to an embodiment of the present utility model, the cylinder body end of left-hand rotation hydraulic ram 8 and active steering rear axle 9 are hinged, and the cylinder rod end of left-hand rotation hydraulic ram 8 and the first track arm 17 are hinged; The cylinder body end of right-hand rotation hydraulic ram 13 and active steering rear axle 9 are hinged, the cylinder rod end of right-hand rotation hydraulic ram 13 be connected track arm 18 and connect.
According to an embodiment of the present utility model, can return to the vehicle maximum travel speed of the driving situation of midway location to rear axle and be stipulated, between 25 kms/hour to 50 kms/hour between.When vehicle speed detector device order 5 detects the vehicle maximum speed in limited time, control setup 6 sends electricly or during the dead electricity signal, rear axle returns to midway location to the switch electromagnetic valve of the first control cock device 7 and the second control cock device 12.At this moment, in the road driving process, by rear axle initiatively hydrostatic steering system guarantee that rear axle mediates, guarantee that vehicle can with stable straight-line travelling, guarantee the road-holding property of vehicle from certain aspect when high speed is travelled.
According to an embodiment of the present utility model, the minimum moving velocity of vehicle of driving situation that rear axle can active steering is stipulated.Only have under the prerequisite that satisfies three conditions, control setup 6 sends electricly or the dead electricity signal to the switch electromagnetic valve of the first control cock device 7 and the second control cock device 12, and rear axle can active steering.
Three condition particular contents are: vehicle speed detector device 5 detects the minimum speed of a motor vehicle limit value of vehicle, and front axle detecting device 4 detects front axle and mediates, and rear axle detecting device 14 detects rear axle and mediates.
Front axle detecting device 4, rear axle detecting device 14 can be angle detection device, also can be the meta detecting device.These two detecting device shareds detect and judge whether steering shaft mediates, as long as there is one steering shaft to be detected and do not mediate, no matter how low the speed of a motor vehicle of vehicle have, and steering controller fixes on midway location with back axle lock all the time, and vehicle is remained on the straight-line travelling state.
According to an embodiment of the present utility model, a kind of multi-wheeler hoisting crane also can be a kind of multi-wheeler, comprises the follow-up steering control system of multi-wheeler hoisting crane as above.
Fig. 7 is a schematic diagram according to the control cock device in an embodiment of the follow-up steering control system of multi-wheeler hoisting crane of the present utility model.
As shown in Figure 7, the first control cock device 30 comprises: the first electromagnetic valve-Y1 and the second electromagnetic valve-Y2; The second control cock device 31 comprises: the 3rd electromagnetic valve-Y3, the 4th electromagnetic valve-Y4 and the 5th electromagnetic valve-Y5.And, shown in embodiment described above, the first oil pressure delivery port A2 of the first control cock device is connected with the rodless cavity of left-hand rotation hydraulic ram, the rod chamber of right-hand rotation hydraulic ram respectively; The second oil pressure delivery port B2 of the first control cock device is connected with the rod chamber of left-hand rotation hydraulic ram, the rodless cavity of right-hand rotation hydraulic ram respectively; The 3rd oil pressure delivery port T1 of the second control cock device is connected with the intermediate cavity of meta locking hydraulic ram, the 4th oil pressure delivery port A1 is connected with rodless cavity and the rod chamber of meta locking hydraulic ram respectively; Wherein, the 3rd oil pressure delivery port T1 communicates with oil return circuit all the time.
When rear axle 33 active steering, each electromagnetic valve electric situation as follows: the first electromagnetic valve-Y1 gets electric, and the second electromagnetic valve-Y2 gets electric, the 3rd electromagnetic valve-Y3 must not the electricity, the 4th electromagnetic valve-Y4 gets electric, the 5th electromagnetic valve-Y5 must not the electricity.At this moment, the rod chamber, intermediate cavity, rodless cavity that turns to the meta locked cylinder all communicates with system hydraulic oil-returning fuel tank.
When the high pressure oil of oil pump output enter the A1 hydraulic fluid port of control cock group one, when system oil return communicates with the B1 hydraulic fluid port of control cock group one, the A2 hydraulic fluid port is exported high pressure oil, B2 hydraulic fluid port oil sump tank, rear axle 33 can be realized left steering.
When the high pressure oil of oil pump output enter the B1 hydraulic fluid port of control cock group one, when system oil return communicates with the A1 hydraulic fluid port of control cock group one, the B2 hydraulic fluid port is exported high pressure oil, A2 hydraulic fluid port oil sump tank, rear axle can be realized right steering.
When rear axle returns meta, when no longer participating in steering procedure, each electromagnetic valve electric situation is as follows: the first electromagnetic valve-Y1 must not electricity, and the second electromagnetic valve-Y2 must not electricity, and the 3rd electromagnetic valve-Y3 gets electric, and the 4th electromagnetic valve-Y4 gets electric.The fluid of oil pump output enters into rod chamber, the rodless cavity that turns to the meta locked cylinder through the P of control cock group two mouth, the 3rd electromagnetic valve-Y3, the 4th electromagnetic valve-Y4, rely on to turn to the inhibiting device of meta locked cylinder inside to get back to rear axle wheel midway location.
When the pressure that acts on the rod chamber that turns to the meta locked cylinder, rodless cavity reaches a certain value, the 5th electromagnetic valve-Y5 gets electric, the 4th electromagnetic valve-Y4 must not be electric, the 3rd electromagnetic valve-Y3 also must not be electric, energy storage 32 is used for the loss of pressure of compensation because turning to meta locked cylinder internal leakage to bring, and namely acts on the rod chamber that turns to the meta locked cylinder, the pressure of rodless cavity is high-voltage oil liquid.
The follow-up steering control system of the utility model multi-wheeler hoisting crane provides a kind of hydraulic control follow-up steering control method for the vehicle with active steering rear axle, improve the hoisting crane low speed rotation to maneuverability and bend carrying capacity, the whipping phenomenon that may occur when avoiding running at high speed.
Description of the present utility model provides for example with for the purpose of describing, and is not exhaustively or with the utility model to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present utility model and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment with various modifications that the utility model design is suitable for special-purpose.
Claims (8)
1. the follow-up steering control system of a multi-wheeler hoisting crane, described multi-wheeler hoisting crane comprises: an active steering rear axle (9), be arranged on left back wheel flutter (11) on described active steering rear axle (9) and right back wheel flutter (15), control the second track arm (18) that the first track arm (17) that described left back wheel flutter (11) turns to and the described right back wheel flutter of control (15) turn to, and oil return circuit, it is characterized in that, described follow-up steering control system comprises:
Left-hand rotation hydraulic ram (8), right-hand rotation hydraulic ram (13) and the first control cock device (7);
The piston rod of described left-hand rotation hydraulic ram (8) and cylinder body bottom are hinged with described active steering rear axle (9) and described the first track arm (17) respectively; The piston rod of described right-hand rotation hydraulic ram (13) and cylinder body bottom are hinged with described active steering rear axle (9) and the second track arm (18) respectively;
The first oil pressure delivery port (A) of described the first control cock device (7) is connected with the rodless cavity of described left-hand rotation hydraulic ram (8), the rod chamber of described right-hand rotation hydraulic ram (13) respectively; The second oil pressure delivery port (B) of described the first control cock device (7) is connected with the rod chamber of described left-hand rotation hydraulic ram (8), the rodless cavity of described right-hand rotation hydraulic ram (13) respectively;
Under described the first oil pressure delivery port (A) output high pressure and described the second oil pressure delivery port (B) and state that described oil return circuit communicates, the piston rod elongation of described left-hand rotation hydraulic ram (8) and the piston rod of described right-hand rotation hydraulic ram (13) shorten, and by driving described the first track arm (17) and the second track arm (18), described left back wheel flutter (11) and right back wheel flutter (15) are turned left;
Described the first oil pressure delivery port (A) communicate with described oil return circuit and the state of described the second oil pressure delivery port (B) output high pressure under, the piston rod of described left-hand rotation hydraulic ram (8) shortens and the piston rod of described right-hand rotation hydraulic ram (13) extends, and by driving described the first track arm (17) and the second track arm (18), described left back wheel flutter (11) and right back wheel flutter (15) is turned right.
2. the system as claimed in claim 1, is characterized in that, also comprises: meta locking hydraulic ram (10) and the second control cock device (12);
Described meta locking hydraulic ram (10) comprising: be fixedly installed on meta locating piece (28) in cylinder body (21), be separately positioned on first piston (22) and second piston (29) of described meta locating piece (28) both sides; Wherein, described first piston (22) is captiveed joint with piston rod, by described first piston (22) and the second piston (29), the inner chamber of cylinder body (21) is separated into rod chamber (25), intermediate cavity (24) and rodless cavity (26), and, form intermediate cavity (24) between described first piston (22) and the second piston (29);
The piston rod (23) of described meta locking hydraulic ram (10) and cylinder body (21) bottom are hinged with described active steering rear axle (9) and described the first track arm (17) or the second track arm (18) respectively; The 3rd oil pressure delivery port (T2) of described the second control cock device (12) is connected with described intermediate cavity (24), and the 4th oil pressure delivery port (D) is connected with rodless cavity (25) and the rod chamber (26) of described meta locking hydraulic ram (10) respectively; Wherein, described the 3rd oil pressure delivery port (T2) communicates with described oil return circuit all the time;
Under described multi-wheeler hoisting crane state to overtake, described the 4th oil pressure delivery port (D) output high pressure and described the 3rd oil pressure delivery port (T2) communicate with described oil return circuit, first piston (22) and the second piston (29) respectively with two end in contact of described meta locating piece (28).
3. system as claimed in claim 2 is characterized in that:
The cylinder body bottom of described left-hand rotation hydraulic ram (8) and described active steering rear axle (9) are hinged, and the piston rod of described left-hand rotation hydraulic ram (8) and described the first track arm (17) are hinged;
The cylinder body bottom of described right-hand rotation hydraulic ram (13) and described active steering rear axle (9) are hinged, the piston rod of described right-hand rotation hydraulic ram (13) be connected track arm (18) and connect.
4. system as claimed in claim 2, is characterized in that, also comprises:
Detect the pressure-detecting device (16) of the 4th oil pressure delivery port (D) oil pressure.
5. system as claimed in claim 4, is characterized in that, also comprises:
Measure the vehicle speed detector device of described multi-wheeler crane running speed.
6. system as claimed in claim 5, is characterized in that, also comprises:
Control each oil pressure delivery port output high pressure of described the first control cock device (7) and the second control cock device (12) or the control setup that communicates with described oil return circuit.
7. system as claimed in claim 6, is characterized in that, also comprises:
Measure described multi-wheeler hoisting crane front axle steering angle the front-axle steering detecting device and measure the rear axle steering detecting device of described active steering rear axle (9) steering angle.
8. multi-wheeler hoisting crane is characterized in that:
The follow-up steering control system that comprises multi-wheeler hoisting crane as described in claim 1 to 7 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220632877 CN202923705U (en) | 2012-11-27 | 2012-11-27 | Follow-up steering control system of multi-axle truck crane and multi-axle truck crane |
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| CN 201220632877 CN202923705U (en) | 2012-11-27 | 2012-11-27 | Follow-up steering control system of multi-axle truck crane and multi-axle truck crane |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923187A (en) * | 2012-11-27 | 2013-02-13 | 徐州重型机械有限公司 | Follow-up steering control system of multi-axle automobile crane and multi-axle automobile crane |
| CN103625546A (en) * | 2013-12-09 | 2014-03-12 | 中联重科股份有限公司 | Auxiliary power steering control method and device and vehicle |
| 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 |
| CN105270469A (en) * | 2015-11-11 | 2016-01-27 | 同济大学 | Motor-driven steering system based on full-hydraulic steering gear |
| CN106741156A (en) * | 2016-11-25 | 2017-05-31 | 航天重型工程装备有限公司 | A kind of single drag link hydraulic steering system and method |
-
2012
- 2012-11-27 CN CN 201220632877 patent/CN202923705U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923187A (en) * | 2012-11-27 | 2013-02-13 | 徐州重型机械有限公司 | Follow-up steering control system of multi-axle automobile crane and multi-axle automobile crane |
| WO2014082426A1 (en) * | 2012-11-27 | 2014-06-05 | 徐州重型机械有限公司 | Follow-up steering control system of multi-axle automobile crane and multi-axle automobile crane |
| CN102923187B (en) * | 2012-11-27 | 2015-08-19 | 徐州重型机械有限公司 | The follow-up steering control system of multi-wheeler hoisting crane and multi-wheeler hoisting crane |
| US9283986B2 (en) | 2012-11-27 | 2016-03-15 | Xuzhou Heavy Machinery Co., Ltd. | Follow-up steering control system for multi-axle automobile crane, and multi-axle automobile crane |
| CN103625546A (en) * | 2013-12-09 | 2014-03-12 | 中联重科股份有限公司 | Auxiliary power steering control method and device and vehicle |
| CN103625546B (en) * | 2013-12-09 | 2016-03-23 | 中联重科股份有限公司 | Auxiliary power steering control method and device and vehicle |
| 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 |
| CN105270469A (en) * | 2015-11-11 | 2016-01-27 | 同济大学 | Motor-driven steering system based on full-hydraulic steering gear |
| CN105270469B (en) * | 2015-11-11 | 2017-07-11 | 同济大学 | A kind of motor-driven steering system based on all-hydraulic steering gear |
| CN106741156A (en) * | 2016-11-25 | 2017-05-31 | 航天重型工程装备有限公司 | A kind of single drag link hydraulic steering system and method |
| CN106741156B (en) * | 2016-11-25 | 2019-03-12 | 航天重型工程装备有限公司 | A kind of list drag link hydraulic steering system and method |
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