CN205204782U - Centre of turning circle body, anti -tilt device , hydraulic system and aerial working platform equipment - Google Patents
Centre of turning circle body, anti -tilt device , hydraulic system and aerial working platform equipment Download PDFInfo
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- CN205204782U CN205204782U CN201520877687.7U CN201520877687U CN205204782U CN 205204782 U CN205204782 U CN 205204782U CN 201520877687 U CN201520877687 U CN 201520877687U CN 205204782 U CN205204782 U CN 205204782U
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Abstract
The utility model relates to a centre of turning circle body, anti -tilt device, hydraulic system and aerial working platform equipment, the centre of turning circle body includes: a hollow shell that be used for with get on the bus fixed core with be used for with get off fixed, the core runs through along upper and lower direction hollow shell, and can for hollow shell's axis rotates, be equipped with cam structure or groove structure on the core, so that the core passes through when rotating along with getting on the bus the profile of cam structure or groove structure makes with the cooperation of the gyro wheel of stroke control switching -over valve stroke control switching -over valve is in the core rotates and carries out the switching -over operation when predetermineeing the angle. The utility model discloses can make mutually support and realize the commutating switching -over operation of valve of the centre of turning circle body and switching -over valve, and then the supplementary anti -tilt device who uses this centre of turning circle body avoids operation equipment to take place the danger of tumbling when taking place to rotate getting on or off the bus.
Description
Technical field
The utility model relates to hydraulic control technology, particularly relates to a kind of center of gyration body, anti-tilting apparatus, hydraulic efficiency pressure system and high-altitude operation platform equipment.
Background technology
High-altitude operation platform equipment a kind ofly can be applied in every profession and trade the implement carrying out the mobility aloft work such as aloft work, equipment installation, maintenance.Because high-altitude operation platform equipment needs to realize at least two kinds of operating modes such as mobile (i.e. driving cycle) and aloft work (non-driving cycle), therefore high-altitude operation platform equipment have employed propons is at present the form that swing axle adds hydraulic pressure hanging oil cylinder, back axle is the form of the rigid bridge be directly connected with vehicle frame, thus make high-altitude operation platform equipment when mobile, be eliminated the compression shock of ground or obstacle in driving process by the quick condition of swing axle, and high-altitude operation platform equipment maintains the stability of aloft work when carrying out aloft work after stopping travelling by the lock-out state of swing axle.
As shown in Figure 1, be the hydraulic principle schematic diagram of existing high-altitude operation platform equipment.In FIG, the rod end of two locked cylinder a8 of the left and right sides leans on swing axle a7, Hydraulic Pump a3 is driven by driving engine a2, provide hydraulic oil to locked cylinder a8, multiple control cock is also provided with at Hydraulic Pump a3 with between fuel tank a5 and locked cylinder 8, comprise two-position three way magnetic valve a1, reducing valve a4 and balance cock a6, the control end of balance cock a6 can be made to receive from the high-voltage signal of Hydraulic Pump a3 or the low-voltage signal from fuel tank a5 by the switching of two-position three way magnetic valve a1, thus realize balance cock a6 to the unlatching of locked cylinder a8 or locking, and then realize quick condition or the lock-out state of swing axle.
For existing high-altitude operation platform equipment, its field of application is usually in space-constrained regions such as indoor, therefore usually compact in design, and it rotates to certain angle if there is getting on the bus relative to getting off in the process of moving, then likely there will be car load centre-of gravity shift and go out situation outside wheel supporting, this will cause high-altitude operation platform equipment to be tumbled, and causes safety misadventure and property damage.
Utility model content
The purpose of this utility model proposes a kind of center of gyration body, anti-tilting apparatus, hydraulic efficiency pressure system and high-altitude operation platform equipment, center of gyration body and change-over valve can be made to cooperatively interact and realize the switch operation of change-over valve.
For achieving the above object, the utility model provides a kind of center of gyration body 4, for being arranged between the getting on or off the bus of implement, comprise: for the core body 41 of getting on the bus fixing and for the hollow housing 42 of getting off fixing, described core body 41 runs through described hollow housing 42 along the vertical direction, and can rotate relative to the axis of described hollow housing 42, described core body 41 is provided with cam structure or groove structure 43, to make described Stroke Control change-over valve 71 when described core body 41 rotate predetermined angle perform switch operation by described cam structure or the profile of groove structure 43 with coordinating of the roller 72 of Stroke Control change-over valve 71 with when getting on the bus and rotate at described core body 41.
Further, described cam structure or groove structure 43 are arranged on the lower end of described core body 41, described Stroke Control change-over valve 71 be fixedly installed on hold described center of gyration body 4 vehicle frame 3 in, and the position corresponding with described cam structure or groove structure 43.
For achieving the above object, the utility model provides a kind of anti-tilting apparatus, for preventing implement from tumbling when getting on or off the bus and rotating, comprising:
Above-mentioned center of gyration body 4;
First floating cylinder 21 and the second floating cylinder 22, is fixedly installed on vehicle frame 3 both sides of described implement, and is leaned the swing axle 1 of described implement by piston rod;
First balance cock 51 and the second balance cock 52, in the working oil path between the pilot pressure source 6 being separately positioned on described first floating cylinder 21 and the respective and described implement of described second floating cylinder 22;
Change-over valve 7, be arranged in the oil circuit control of described first balance cock 51 and described second balance cock 52, switch operation is carried out, the locking realizing described first floating cylinder 21 and the second floating cylinder 22 respectively to make described first balance cock 51 and described second balance cock 52 for the rotational angle of getting on or off the bus according to described implement;
Wherein, described change-over valve 7 is Stroke Control change-over valve 71, and described center of gyration body 4 is arranged between getting on or off the bus of described implement.
Further, the pressure oil of the oil inlet P of described change-over valve 7 is from the walking working oil path of described implement, the oil return inlet T of described change-over valve 7 is communicated with the fuel tank of described implement, an actuator port A of described change-over valve 7 is communicated with the control port of described first balance cock 51 with described second balance cock 52 respectively, described first balance cock 51 and described second balance cock 52 can be made to switch between unlatching and locking by the commutation of described change-over valve 7.
Further, described first balance cock 51 comprises: the first check valve 5a and the first by pass valve 5b with described first check valve 5a reverse parallel connection, the oil inlet of described first check valve 5a is communicated with the fluid chamber of described pilot pressure source 6 with described first floating cylinder 21 respectively with oil outlet, the spring side control chamber of described first by pass valve 5b is communicated with the oil outlet of described first by pass valve 5b, and described first by pass valve 5b is communicated with the control port V2 of described first balance cock 51 with the oil inlet of described first by pass valve 5b without spring side control chamber;
Described second balance cock 52 comprises: the second check valve 5a ' and the second by pass valve 5b ' with described second check valve 5a ' reverse parallel connection, the oil inlet of described second check valve 5a ' is communicated with the fluid chamber of described pilot pressure source 6 with described second floating cylinder 22 respectively with oil outlet, the spring side control chamber of described second by pass valve 5b ' is communicated with the oil outlet of described second by pass valve 5b ', and described second by pass valve 5b ' is communicated with the control port V2 of described second balance cock 52 with the oil inlet of described second by pass valve 5b ' without spring side control chamber.
Further, also comprise shuttle valve 8, two oil inlet a of described shuttle valve 8, b are communicated with two working oil path of walking of described implement respectively, and the oil outlet c of described shuttle valve 8 is communicated with the oil inlet of described change-over valve 7.
For achieving the above object, the utility model provides a kind of hydraulic efficiency pressure system of implement, comprise main power 10, walking valve block 9, pilot pressure source 6 and fuel tank 11, described main power 10 is the walking working oil path supply hydraulic fluid of described walking valve block 9, also comprises aforesaid anti-tilting apparatus.
For achieving the above object, the utility model provides a kind of high-altitude operation platform equipment, comprises vehicle frame 3, as the swing axle 1 of propons and the rigid bridge as back axle, also comprises aforesaid hydraulic efficiency pressure system.
Based on technique scheme, the utility model being provided with comprises the center of gyration body of core body and hollow housing, core body is provided with cam structure or groove, make core body with when rotating with fixing the getting on the bus of core body, can by cooperatively interacting between the profile of cam structure or groove structure and the roller of Stroke Control change-over valve, Stroke Control change-over valve is made to perform switch operation when core body rotates predetermined angle, and then make the anti-tilting apparatus applying this center of gyration body avoid the car load center of gravity of implement deflect away from support scope and cause tumbling, ensure the safety of implement.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the hydraulic principle schematic diagram of existing high-altitude operation platform equipment.
Fig. 2 is the hydraulic principle schematic diagram of the hydraulic efficiency pressure system of a kind of implement including the utility model anti-tilting apparatus embodiment.
Fig. 3 is the hydraulic principle schematic diagram of change-over valve in the utility model anti-tilting apparatus embodiment.
Fig. 4 is the hydraulic principle schematic diagram of the first balance cock and the second balance cock in the utility model anti-tilting apparatus embodiment.
Fig. 5 is the mounting structure schematic diagram of Stroke Control change-over valve and center of gyration body in the utility model anti-tilting apparatus embodiment.
Fig. 6 is the structural representation of an embodiment of the utility model center of gyration body.
Fig. 7 is the hydraulic principle schematic diagram of the hydraulic efficiency pressure system of the another kind of implement of the utility model anti-tilting apparatus embodiment.
Detailed description of the invention
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
As shown in Figure 2, for including the hydraulic principle schematic diagram of the hydraulic efficiency pressure system of a kind of implement of the utility model anti-tilting apparatus embodiment.Anti-tilting apparatus is applied in the hydraulic efficiency pressure system of implement, is mainly used to prevent implement from tumbling when getting on or off the bus and rotating.This anti-tilting apparatus comprises:
First floating cylinder 21 and the second floating cylinder 22, is fixedly installed on vehicle frame 3 both sides of implement, and is leaned the swing axle 1 of implement by piston rod;
First balance cock 51 and the second balance cock 52, is separately positioned in the first floating cylinder 21 and the working oil path of the second floating cylinder 22 separately and between the pilot pressure source 6 of implement;
Change-over valve 7, be arranged in the oil circuit control of the first balance cock 51 and the second balance cock 52, switch operation is carried out, the locking realizing the first floating cylinder 21 and the second floating cylinder 22 respectively to make the first balance cock 51 and the second balance cock 52 for the rotational angle of getting on or off the bus according to implement.
In the present embodiment, why the swing axle of implement can be converted to lock-out state from quick condition, it needs the first balance cock and the second balance cock to lock the first floating cylinder and the second floating cylinder respectively, and the locking of the first balance cock and the second balance cock is then realized by the rotational angle commutation of getting on or off the bus of change-over valve according to implement.The locking of the balance cock of floating cylinder and the rotational angle of getting on or off the bus just connect by the anti-tilting apparatus of this sample embodiment, lock floating cylinder timely when getting on or off the bus and turning to predetermined angle, thus solve the problem occurring because getting on or off the bus revolution when existing implement is walked to cause after center of gravity deflects away from support scope tumbling.
In the present embodiment, pilot pressure source can, when balance cock non-locking floating cylinder to its control action of floating cylinder, can make the piston rod of floating cylinder stretch out, to change the position of vehicle frame relative to swing axle.Fuel feeding can be carried out by independently guide's oil pump in pilot pressure source, also can obtain hydraulic oil from the main power of implement and reduced pressure treatment is used as pilot pressure oil.First floating cylinder and the second floating cylinder can adopt single acting oil cylinder usually, namely one end is communicated with pilot pressure source, the other end then provides acting in opposition by elements such as being arranged on in-oil cylinder spring, certain first floating cylinder and the second floating cylinder also optionally can select two-way cylinder, have just repeated no more here.
For change-over valve 7, preferably the pressure oil of its oil inlet P is from the walking working oil path of implement, and its oil return inlet T is communicated with the fuel tank of implement, an actuator port A of change-over valve 7 is communicated with the control port of the first balance cock 51 with the second balance cock 52 respectively, the first balance cock 51 and the second balance cock 52 can be made to switch between unlatching and locking by the commutation of change-over valve 7.
Why select the walking working oil path of implement for balance cock provide control pressure oil, because the walking operating mode of anti-tipping effect and implement can be made to connect like this, for some implements, it is still in work place when carrying out operation, floating cylinder is natively in the lock state, and usually also larger Area of bearing can be set, turn round even if get on or off the bus, also there is not the situation that centre-of gravity shift goes out to support scope; And it in the process of moving (under operating mode of namely walking), the pressure oil with certain pressure run in walking working oil path then can provide the control action to balance cock.
Specifically, the first balance cock 51 in the present embodiment and the second balance cock 52 can adopt existing all kinds of balance cock element or realize the hydraulic structure of balance cock function, then show a kind of balancing valve structure example that can be used as the first balance cock 51 and the second balance cock 52 in the diagram.In this example, first balance cock 51 comprises: the first check valve 5a and the first by pass valve 5b with the first check valve 5a reverse parallel connection, the oil inlet of the first check valve 5a is communicated with the fluid chamber of pilot pressure source 6 with the first floating cylinder 21 respectively with oil outlet, the spring side control chamber of the first by pass valve 5b is communicated with the oil outlet of the first by pass valve 5b, and the first by pass valve 5b is communicated with the control port V2 of the first balance cock 51 with the oil inlet of the first by pass valve 5b without spring side control chamber.Here reverse parallel connection refers to that the oil inlet of the first check valve 5a is connected with the oil outlet of the first by pass valve 5b, corresponding to the interface V1 of the first balance cock 51, and the oil outlet of the first check valve 5a is connected with the oil inlet of the first by pass valve 5b, corresponding to the interface C1 of the first balance cock 51.In Fig. 4, solid line represents working oil path, and dotted line represents oil circuit control, and the region at long and short dash line what is called place then represents that the function of enclosed Hydraulic Elements is overall.
Second balance cock 52 can adopt the structure identical with the first balance cock 51, comprise: the second check valve 5a ' and the second by pass valve 5b ' with the second check valve 5a ' reverse parallel connection, the oil inlet of the second check valve 5a ' is communicated with the fluid chamber of pilot pressure source 6 with the second floating cylinder 22 respectively with oil outlet, the spring side control chamber of the second by pass valve 5b ' is communicated with the oil outlet of the second by pass valve 5b ', and the second by pass valve 5b ' is communicated with the control port V2 of the second balance cock 52 with the oil inlet of the second by pass valve 5b ' without spring side control chamber.Here reverse parallel connection refers to that the oil inlet of the second check valve 5a ' is connected with the oil outlet of the second by pass valve 5b ', corresponding to the interface V1 of the second balance cock 52, and the oil outlet of the second check valve 5a ' is connected with the oil inlet of the second by pass valve 5b ', corresponding to the interface C1 of the second balance cock 52.
Balancing valve structure shown in Fig. 4 have employed the unitized construction of check valve and by pass valve reverse parallel connection, and being connected with outside oil circuit control without spring side control chamber of by pass valve, this just makes by pass valve can Compress Spring and be in opening when outside oil circuit control arrives preset pressure, and external control oil circuit is switched to connect fuel tank or connect lower pressure oil circuit on time, by pass valve then can become closed condition under the action of the spring, and check valve also ensure that the state that oppositely can not be communicated with simultaneously, thus floating cylinder is locked.Except the basic function of balance cock, the spring side control chamber of by pass valve is communicated with oil inlet with the oil outlet of by pass valve respectively with without spring side control chamber, this just makes floating cylinder that the boost in pressure of the oil inlet of by pass valve can be made to the spool Compress Spring that can promote by pass valve when bearing excessive pressure, thus open overflow ducts, avoid the damage of the Hydraulic Elements such as floating cylinder, by pass valve and associated pipe.
Mention above, the locking of the balance cock of floating cylinder and the rotational angle of getting on or off the bus connect by the utility model, and the means of this contact utilize the switching of the oil circuit of change-over valve to realize.Oil inlet and the return opening of change-over valve are communicated with walking working oil path and the fuel tank of implement respectively, and the pressure of the control port of balance cock therefore can be made to switch between high pressure and low pressure signal by change-over valve.And the form of change-over valve can adopt automatically controlled or hydraulic control mode, namely by detect get on or off the bus rotate to predetermined angle time, by transmitting electric signal or hydraulic pressure signal, change-over valve is commutated.
In addition, change-over valve also can adopt the mode of Stroke Control, such as, Stroke Control change-over valve 71 shown in Fig. 3, and the spool that the trip controls change-over valve 71 is connected with roller 72, and roller 72 drives valve core movement under being promoted by external force.As shown in Figure 5, be the mounting structure schematic diagram of Stroke Control change-over valve 71 and center of gyration body 4.The concrete structure example of the center of gyration body 4 shown in composition graphs 6, can see that the core body 41 of the center of gyration body 4 installed between the getting on or off the bus of implement is provided with cam structure or groove structure 43, and the roller 72 of Stroke Control change-over valve 71 leans on the cam structure or groove structure 43 of core body 41, to make Stroke Control change-over valve 71 when core body 41 rotate predetermined angle perform switch operation by cam structure or the profile of groove structure 43 with coordinating of the roller 72 of Stroke Control change-over valve 71 with when getting on the bus and rotate at core body 41.
For the center of gyration body shown in Fig. 6, can transform on existing center of gyration body, process cam structure or groove structure 43, also directly can produce the center of gyration body of this structure.The structure example of the center of gyration body that the utility model provides, for being arranged between the getting on or off the bus of implement, this center of gyration body 4 specifically comprises: for the core body 41 of getting on the bus fixing and for the hollow housing 42 of getting off fixing, core body 41 runs through hollow housing 42 along the vertical direction, and can rotate relative to the axis of hollow housing 42, core body 41 is provided with cam structure or groove structure 43, to make Stroke Control change-over valve 71 when core body 41 rotate predetermined angle perform switch operation by cam structure or the profile of groove structure 43 with coordinating of the roller 72 of Stroke Control change-over valve 71 with when getting on the bus and rotate at core body 41.Wherein, cam structure or groove structure 43 are preferably arranged on the lower end of core body 41, in order to avoid affect coordinating of core body 41 and many empty capsids 42, Stroke Control change-over valve 71 then can be fixedly installed on hold center of gyration body 4 vehicle frame 3 in, and the position corresponding with cam structure or groove structure 43.
The core body 41 of center of gyration body is provided with multiple through hole 45, hollow housing 42 is also provided with multiple through hole 44, these through holes can be used for the cable line and hydraulic circuit etc. of getting on or off the bus to walk, on hollow housing 42 be fixed on get off, can the adapter plate 46 with multiple mounting hole be set on hollow housing 42, to guarantee the stability of hollow housing 42.
Multiple embodiments of above-mentioned anti-tilting apparatus, center of gyration body are applicable to all kinds of hydraulic efficiency pressure system having the implement of anti-tipping demand, and the anti-tipping function realized is not limited only to operating mode of walking, and is also applicable to non-walking operating mode.
The utility model figure 7 illustrates the hydraulic principle schematic diagram of the hydraulic efficiency pressure system of the another kind of implement of anti-tilting apparatus embodiment.The hydraulic efficiency pressure system of this implement comprises main power 10, walking valve block 9, pilot pressure source 6, fuel tank 11 and aforesaid anti-tilting apparatus, and main power 10 is the walking working oil path supply hydraulic fluid of walking valve block 9.Consider that walking valve block 9 may relate at least two walking working oil path, therefore anti-tilting apparatus can further include shuttle valve 8, two oil inlet a of shuttle valve 8, b are communicated with two working oil path of walking of implement respectively, and the oil outlet c of shuttle valve 8 is communicated with the oil inlet of change-over valve 7.Shuttle valve 8 can screen the pressure in walking working oil path, and the pressure signal getting larger pressure falls the oil inlet of change-over valve 7, and then as one of control signal of control the first balance cock 51 and the second balance cock 52.In addition, in the present embodiment, the hydraulic oil in pilot pressure source 6, from main power 10, also can adopt the Hydraulic Pump of self to carry out fuel feeding in other embodiments.
Above-mentioned hydraulic efficiency pressure system is applicable to all kinds of implement having anti-tipping demand, then particularly applicable for the aforementioned high-altitude operation platform equipment mentioned, such as shown in Fig. 7, this high-altitude operation platform equipment comprises vehicle frame 3, the swing axle 1 as propons and the rigid bridge (not shown) as back axle, also comprises hydraulic efficiency pressure system according to claim 7.
Below for the hydraulic efficiency pressure system of the high-altitude operation platform equipment shown in Fig. 7, illustratively anti-tilting apparatus how specifically to play its anti-tipping function, as follows:
When high-altitude operation platform equipment is in working condition, car load is in the state of stationary support, the pressure of working oil path of now walking is lower, therefore regardless of the rotational angle of getting on or off the bus, whether change-over valve 7 commutates, and the control port of the first balance cock 51 and the second balance cock 52 is lower pressure, and now by pass valve is in closed condition under the action of the spring, in addition the counteresteer function of check valve, thus the first floating cylinder 21 and the second floating cylinder 22 are all in the lock state.
When high-altitude operation platform equipment is in walking operating mode, now because car load is not in the state of stationary support, now there is anti-tipping demand, and now owing to having at least a road to have higher load pressure in walking working oil path, and this load pressure can act on the control port of the first balance cock 51 and the second balance cock 52 when change-over valve 7 does not commutate, thus Compress Spring and make by pass valve be in opening, thus realize the float function of swing axle 1.But high-altitude operation platform equipment occur in the process of walking getting on the bus rotate relative to getting off time, then likely cause center of gravity over-deflection when turning to certain angle and cause rollover risk, now then need just to need to lock floating cylinder in time when not arriving the preset security angle of this angle, the realization of this preset security angle is then realized by the cam structure on center of gyration body 4 or groove structure, and the concrete profile of cam structure or groove structure can design according to the installation site of Stroke Control change-over valve and the factor such as preset security angle in relative rotation of getting on or off the bus, here just repeated no more.
In other words, when turning to predetermined angle when occurring getting on the bus in high-altitude operation platform equipment walking process relative to getting off, cam structure or the groove structure roller that will promote on Stroke Control change-over valve realize the stroke change of spool, and then change-over valve is commutated, the control port of the first balance cock 51 and the second balance cock 52 is switched to lower pressure, such by pass valve can be in closed condition again under the action of the spring, in addition the counteresteer function of check valve, thus the first floating cylinder 21 and the second floating cylinder 22 are all in the lock state.
When the pressure of floating cylinder is excessive, when exceeding the safe pressure threshold value of by pass valve, then can open by pass valve and carry out overflow, thus avoid the damage of the Hydraulic Elements such as floating cylinder, by pass valve and associated pipe.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to detailed description of the invention of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (8)
1. a center of gyration body (4), for being arranged between the getting on or off the bus of implement, it is characterized in that, comprise: for the core body of getting on the bus fixing (41) and for the hollow housing of getting off fixing (42), described core body (41) runs through described hollow housing (42) along the vertical direction, and can rotate relative to the axis of described hollow housing (42), described core body (41) is provided with cam structure or groove structure (43), to make described Stroke Control change-over valve (71) when described core body (41) rotate predetermined angle perform switch operation by described cam structure or the profile of groove structure (43) with coordinating of the roller (72) of Stroke Control change-over valve (71) with when getting on the bus and rotate at described core body (41).
2. center of gyration body (4) according to claim 1, it is characterized in that, described cam structure or groove structure (43) are arranged on the lower end of described core body (41), described Stroke Control change-over valve (71) be fixedly installed on hold described center of gyration body (4) vehicle frame (3) in, and the position corresponding with described cam structure or groove structure (43).
3. an anti-tilting apparatus, for preventing implement from tumbling when getting on or off the bus and rotating, is characterized in that, comprise:
Center of gyration body (4) as described in any one of claim 1 ~ 2;
First floating cylinder (21) and the second floating cylinder (22), be fixedly installed on vehicle frame (3) both sides of described implement, and lean the swing axle (1) of described implement by piston rod;
First balance cock (51) and the second balance cock (52), be separately positioned in described first floating cylinder (21) and the working oil path of described second floating cylinder (22) separately and between the pilot pressure source (6) of described implement;
Change-over valve (7), be arranged in the oil circuit control of described first balance cock (51) and described second balance cock (52), switch operation is carried out, the locking realizing described first floating cylinder (21) and the second floating cylinder (22) respectively to make described first balance cock (51) and described second balance cock (52) for the rotational angle of getting on or off the bus according to described implement;
Wherein, described change-over valve (7) is Stroke Control change-over valve (71), and described center of gyration body (4) is arranged between getting on or off the bus of described implement.
4. anti-tilting apparatus according to claim 3, it is characterized in that, the pressure oil of the oil inlet (P) of described change-over valve (7) is from the walking working oil path of described implement, the return opening (T) of described change-over valve (7) is communicated with the fuel tank of described implement, an actuator port (A) of described change-over valve (7) is communicated with the control port of described first balance cock (51) with described second balance cock (52) respectively, described first balance cock (51) and described second balance cock (52) can be made to switch between unlatching and locking by the commutation of described change-over valve (7).
5. anti-tilting apparatus according to claim 4, it is characterized in that, described first balance cock (51) comprising: the first check valve (5a) and the first by pass valve (5b) with described first check valve (5a) reverse parallel connection, the oil inlet of described first check valve (5a) is communicated with the fluid chamber of described pilot pressure source (6) with described first floating cylinder (21) respectively with oil outlet, the spring side control chamber of described first by pass valve (5b) is communicated with the oil outlet of described first by pass valve (5b), being communicated with the control port (V2) of described first balance cock (51) with the oil inlet of described first by pass valve (5b) without spring side control chamber of described first by pass valve (5b),
Described second balance cock (52) comprising: the second check valve (5a ') and with the second by pass valve of described second check valve (5a ') reverse parallel connection (5b '), the oil inlet of described second check valve (5a ') is communicated with the fluid chamber of described pilot pressure source (6) with described second floating cylinder (22) respectively with oil outlet, the oil outlet of the spring side control chamber of described second by pass valve (5b ') and described second by pass valve (5b ') is communicated with, the oil inlet without spring side control chamber and described second by pass valve (5b ') of described second by pass valve (5b ') is communicated with the control port (V2) of described second balance cock (52).
6. anti-tilting apparatus according to claim 4, it is characterized in that, also comprise shuttle valve (8), two oil inlet (a of described shuttle valve (8), b) be communicated with two working oil path of walking of described implement respectively, the oil outlet (c) of described shuttle valve (8) is communicated with the oil inlet of described change-over valve (7).
7. the hydraulic efficiency pressure system of an implement, comprise main power (10), walking valve block (9), pilot pressure source (6) and fuel tank (11), described main power (10) is the walking working oil path supply hydraulic fluid of described walking valve block (9), it is characterized in that, also comprise the arbitrary described anti-tilting apparatus of claim 3 ~ 6.
8. a high-altitude operation platform equipment, comprises vehicle frame (3), as the swing axle (1) of propons and the rigid bridge as back axle, it is characterized in that, also comprise hydraulic efficiency pressure system according to claim 7.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520417530.6U CN205047557U (en) | 2015-06-16 | 2015-06-16 | Anti -tilt device , hydraulic system and aerial working platform equipment |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520417530.6U Division CN205047557U (en) | 2015-06-16 | 2015-06-16 | Anti -tilt device , hydraulic system and aerial working platform equipment |
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| CN205204782U true CN205204782U (en) | 2016-05-04 |
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| CN201520417530.6U Expired - Fee Related CN205047557U (en) | 2015-06-16 | 2015-06-16 | Anti -tilt device , hydraulic system and aerial working platform equipment |
| CN201520877687.7U Expired - Fee Related CN205204782U (en) | 2015-06-16 | 2015-06-16 | Centre of turning circle body, anti -tilt device , hydraulic system and aerial working platform equipment |
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| CN201520417530.6U Expired - Fee Related CN205047557U (en) | 2015-06-16 | 2015-06-16 | Anti -tilt device , hydraulic system and aerial working platform equipment |
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| CN106321538B (en) * | 2015-06-16 | 2018-09-04 | 徐工集团工程机械股份有限公司 | Anti-tilting apparatus, hydraulic system, aerial work platform equipment and centre of gyration body |
| CN109231093B (en) * | 2018-11-23 | 2020-11-20 | 东阳市晖宏环境工程有限公司 | Greening engineering aerial working platform based on supercharging function |
| CN109340205B (en) * | 2018-12-21 | 2023-10-24 | 北京三一智造科技有限公司 | Floatable oil cylinder and engineering machinery |
| CN110566522A (en) * | 2019-09-06 | 2019-12-13 | 湖南星邦重工有限公司 | Active floating control system for underframe and aerial work platform thereof |
| CN112648246A (en) * | 2020-12-29 | 2021-04-13 | 湖南中联重科智能高空作业机械有限公司 | Safety detection valve, floating control system and aerial work platform |
| CN113003501B (en) * | 2021-03-19 | 2022-06-24 | 湖南星邦智能装备股份有限公司 | Floating device of aerial work platform |
-
2015
- 2015-06-16 CN CN201520417530.6U patent/CN205047557U/en not_active Expired - Fee Related
- 2015-06-16 CN CN201520877687.7U patent/CN205204782U/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN205047557U (en) | 2016-02-24 |
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