CN204801506U - Walking brake control hydraulic system and cut fork aerial working platform - Google Patents
Walking brake control hydraulic system and cut fork aerial working platform Download PDFInfo
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- CN204801506U CN204801506U CN201520413435.9U CN201520413435U CN204801506U CN 204801506 U CN204801506 U CN 204801506U CN 201520413435 U CN201520413435 U CN 201520413435U CN 204801506 U CN204801506 U CN 204801506U
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Abstract
The utility model relates to a walking brake control hydraulic system and cut fork aerial working platform, walking brake control hydraulic system are used for controlling the walking and the braking of vehicle, include: brake circuit and the driving circuit of connection on same oil feed oil circuit is equipped with the braking part in brake circuit, be equipped with time delay break -make part, throttle part and drive the driver part that the vehicle was walked in driving circuit, and time delay break -make part sets up on the oil feed oil circuit, can put through oil feed oil circuit and driving circuit with the realization walking after opening the braking part. The utility model discloses a walking brake control hydraulic system can make the vehicle when the start -up is travel, and braking system slowly loosens in advance, has certain acceleration process in messenger's start -up course to make the start -up course comparatively steady, prevent the vehicle because inertia and tumbling in order to avoid cause the incident, has improved the reliability and the security level of whole car.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly relates to a kind of walking control for brake hydraulic efficiency pressure system and scissor aerial work platform.
Background technology
Along with domestic and international expanding economy, engineering construction project gets more and more, and the frequency of utilization of high-altitude operation platform is also more and more frequent.Now the kind of high-altitude operation platform is commercially a lot, and wherein scissor aerial work platform is modal one.High-altitude operation platform requires very high to the safety performance of complete machine, because careless slightly, just likely cause casualties accident.Especially high-altitude operation platform is starting in the process travelled and brake, and can realize a smooth transition, to ensure the safety of car load action as far as possible.
Scissor aerial work platform generally controls walking and the braking of car load by hydraulic efficiency pressure system, walking control for brake hydraulic efficiency pressure system of the prior art generally takes scheme as shown in Figure 1, comprise lifting loop successively, turn to loop, brake circuit and drive circuit, wherein, P is oil inlet, and T1, T2 are return opening, and CSE mouth connects elevating ram, A/B mouth connects steering cylinder, and F mouth connects brake system.
Being provided with lifting change-over valve 1a in lifting loop, is two position and four-way reversing valves, when the right position work of lifting change-over valve 1a, is elevating ram fuel feeding, thus performs scissor lifting action, when the left position work of lifting change-over valve 1a, can be follow-up actuating unit fuel feeding.Turn in loop and set gradually pressure-gradient control valve 2a and turn to change-over valve 3a, thus control the handling maneuver of car load.In addition, brake circuit and the synchronous fuel feeding of drive circuit, drive circuit comprises: direction of travel change-over valve 4a, check valve 5a, walking mode change-over valve 6a, the first motor 7a and the second motor 8a, first motor 7a and the second motor 8a is used for driving the revolver of car load front axle respectively and rightly takes turns, combinative movement between these valves can realize scissor aerial work platform and walk according to different patterns, direction of travel change-over valve 6a controls car load and advances and retreat, and walking mode change-over valve 8a controls the work of motor serial or parallel connection.
When oil inlet P fuel feeding, brake system is unclamped, and motor drives car load walking simultaneously, and when oil inlet P stop control lever, brake system is closed immediately, and motor stops driving car load walking.But there are following two aspect deficiencies in the scheme of prior art: the first, car load start travel time, start very fast, there is no accelerator, and brake system can not shift to an earlier date take-off the brake thus make car load smooth starting effectively; The second, when car load is braked, brake system is closed immediately, makes car load in braking procedure, not have certain buffer distance, easily occurs being subject to inertia and the phenomenon of tumbling.
Utility model content
The purpose of this utility model proposes a kind of walking control for brake hydraulic efficiency pressure system and scissor aerial work platform, vehicle can being made comparatively steady when starting traveling, being not easy the phenomenon occurring tumbling due to inertia.
For achieving the above object, the utility model provides a kind of walking control for brake hydraulic efficiency pressure system on the one hand, for controlling walking and the braking of vehicle, it is characterized in that, comprise: be connected to the brake circuit on same oil-feed oil circuit and drive circuit, in described brake circuit, be provided with brake component, in described drive circuit, be provided with the drive element of time delay break-make parts, throttle part and driving vehicle to run
Described time delay break-make parts are arranged on described oil-feed oil circuit, can connect described oil-feed oil circuit and described drive circuit to realize walking after opening described brake component.
Further, described oil-feed oil circuit is provided with collateral branch's oil circuit, and described throttle part is arranged on described collateral branch oil circuit, can carry out throttling governing when braking to the oil return of described brake component.
Further, also comprise direction of travel change-over valve 9, described direction of travel change-over valve 9 is arranged between described time delay break-make parts and described drive element, can control the direction of travel of described vehicle.
Further, be interconnected between oil inlet A, the return opening B of described direction of travel change-over valve 9 and the hydraulic fluid port E be communicated with described throttle part, described oil inlet A is communicated with the second actuator port D with the first actuator port C of described direction of travel change-over valve 9 respectively by restriction with described return opening B.
Further, described drive element comprises: be used for respectively driving the revolver of described vehicle and right first motor 11 and the second motor 12 of taking turns, connected by walking mode change-over valve 10 between described first motor 11 and described second motor 12, described walking mode change-over valve 10 can control described first motor 11 and described second motor 12 realizes connected in series or in parallel.
Further, described time delay break-make parts are logical valve 7 or sequence valve, can after the pressure of described oil-feed oil circuit reaches setting value, connect described oil-feed oil circuit and described drive circuit to realize walking.
Further, described throttle part is flow regulating valve 8 or governor valve.
Further, being provided with the interface connecting manual pump in described brake circuit, the manual releasing of described brake component can be realized by connecting described manual pump.
Further, described time delay break-make parts are time-delay switch, can lead to after oil reaches Preset Time at described oil-feed oil circuit, connect described oil-feed oil circuit and described drive circuit to realize walking.
For achieving the above object, the utility model provides a kind of scissor aerial work platform on the other hand, comprises the walking control for brake hydraulic efficiency pressure system of above-described embodiment.
Further, described walking control for brake hydraulic efficiency pressure system also comprises: be connected to the lifting loop on described oil-feed oil circuit, in described lifting loop, be provided with lifting change-over valve 2 and elevating ram, described lifting change-over valve 2 can control described scissor aerial work platform and switch between lifting action and walking motion.
Further, described walking control for brake hydraulic efficiency pressure system also comprises: be connected to and described oil-feed oil circuit turns to loop, be provided with pressure-gradient control valve 4 described turning in loop, turn to change-over valve 5 and steering cylinder, the described rotation direction turning to change-over valve 5 can control described steering cylinder, described pressure-gradient control valve 4 can control described scissor aerial work platform and receive when turning to travel commands at the same time, preferentially performs handling maneuver.
Based on technique scheme, the walking control for brake hydraulic efficiency pressure system of the utility model embodiment, by arranging time delay break-make parts in drive circuit, vehicle can be made when starting traveling, and brake system is slowly unclamped in advance, makes there is certain accelerator in start-up course, thus make start-up course comparatively steady, prevent vehicle from tumbling due to inertia, in order to avoid cause safety misadventure, improve reliability and the safe class of car load.
Another embodiment of the present utility model, by arranging throttle part on collateral branch's oil circuit of oil-feed oil circuit, throttling governing can be carried out to the oil return of brake component when braking, thus making vehicle when braking, brake system is slowly closed, and making has certain buffer distance in braking procedure, and then make braking procedure comparatively steady, prevent vehicle from tumbling due to inertia, in order to avoid cause safety misadventure, further increase reliability and the safe class of car load.
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 schematic diagram of control for brake hydraulic efficiency pressure system of walking in prior art;
Fig. 2 is the schematic diagram of an embodiment of the utility model walking control for brake hydraulic efficiency pressure system.
Description of reference numerals
1a-lifting change-over valve; 2a-pressure-gradient control valve; 3a-turns to change-over valve; 4a-direction of travel change-over valve; 5a-check valve; 6a-walking mode change-over valve; 7a-first motor; 8a-second motor;
1-first by pass valve; 2-lifting change-over valve; 3-second by pass valve; 4-pressure-gradient control valve; 5-turns to change-over valve; 6-check valve; 7-logical valve; 8-flow regulating valve; 9-direction of travel change-over valve; 10-walking mode change-over valve; 11-first motor; 12-second motor.
Detailed description of the invention
Below describe the utility model in detail.In the following paragraphs, the different aspect of embodiment is defined in more detail.The each side of restriction like this can combine with any other one aspect or many aspects, not may be combined with unless explicitly stated otherwise.Especially, be considered to preferred or favourable any feature and one or morely can be considered to preferred or favourable feature with other.
Terms such as " first ", " second " that occur in the utility model is only for convenience of description, to distinguish the different constituent elementss with same names, does not represent successively or primary-slave relation.
In order to improve the stability of vehicle when starting traveling and braking, the utility model provides a kind of walking control for brake hydraulic efficiency pressure system, for controlling walking and the braking of vehicle, comprise: be connected to the brake circuit on same oil-feed oil circuit and drive circuit, brake component is provided with in brake circuit, the drive element of time delay break-make parts, throttle part and driving vehicle to run is provided with in drive circuit, time delay break-make parts are arranged on oil-feed oil circuit, can connect oil-feed oil circuit and drive circuit to realize walking after opening brake component.
The walking control for brake hydraulic efficiency pressure system of the utility model embodiment, by arranging time delay break-make parts in drive circuit, vehicle can be made when starting traveling, brake system is slowly unclamped in advance, make in start-up course, there is certain accelerator, thus make start-up course comparatively steady, prevent vehicle from tumbling due to inertia, in order to avoid cause safety misadventure, improve reliability and the safe class of car load.
Further, the oil-feed oil circuit of walking control for brake hydraulic efficiency pressure system is provided with collateral branch's oil circuit, and throttle part is arranged on collateral branch's oil circuit, can carry out throttling governing when braking to the oil return of brake component.
This embodiment by arranging throttle part on collateral branch's oil circuit of oil-feed oil circuit, after the fuel feeding of oil-feed oil circuit can being cut off when braking, throttling governing is carried out to the oil return of brake component, thus making vehicle when braking, brake system is slowly closed, and making has certain buffer distance in braking procedure, and then make braking procedure comparatively steady, prevent vehicle from tumbling due to inertia, in order to avoid cause safety misadventure, further increase reliability and the safe class of car load.
Above-mentioned walking control for brake hydraulic efficiency pressure system is used for the walking of vehicle and control for brake, can be applied in anyly to have in the vehicle of walking function.And this hydraulic efficiency pressure system can be independently system, form separately walking and control for brake that vehicle is only carried out in a set of loop; Also can with vehicle in perform other action hydraulic control circuit integrate, be more convenient to control when there is crosslinked relation like this between different action.
Mention in background technology, scissor aerial work platform requires very high to the safety performance of complete machine, because careless slightly, just likely cause casualties accident.Especially starting in the process travelled and brake at scissor high-altitude operation platform, if can not realize a smooth transition, bring threat then may to the safety of car load action, and bring psychological fear to operating personal, especially when scissors mechanism drives job platform to arrive certain altitude, easily to topple over, more need car load start and braking time more steady.Thus the utility model by emphasis to be applied as example in scissor aerial work platform, is described in detail by the following examples.
In another embodiment of the present utility model, hydraulic system principle figure shown in Figure 2, walking control for brake hydraulic efficiency pressure system also comprises direction of travel change-over valve 9, and direction of travel change-over valve 9 is arranged between time delay break-make parts and drive element, can control the direction of travel of vehicle.
Further, be interconnected between oil inlet A, the return opening B of direction of travel change-over valve 9 and the hydraulic fluid port E be communicated with throttle part, oil inlet A is communicated with the second actuator port D with the first actuator port C of direction of travel change-over valve 9 respectively by restriction with return opening B.Because the Median Function of direction of travel change-over valve 9 is with the function of throttling, when car load is walked, all the time there is back pressure in the return opening of drive element, and due to the existence of back pressure makes the kinematic velocity of car load can not be too fast, and the abnormal sound that actuating device may send can be eliminated as far as possible.
In this hydraulic efficiency pressure system, drive element comprises: be used for respectively driving the revolver of vehicle and right first motor 11 and the second motor 12 of taking turns, such as, the revolver that these two motors can drive automobile front-axle corresponding respectively and rightly to take turns, connected by walking mode change-over valve 10 between first motor 11 and the second motor 12, walking mode change-over valve 10 can control the first motor 11 and the second motor 12 realizes connected in series or in parallel.
Refer to time delay break-make parts, throttle part, direction of travel change-over valve 9 and walking mode change-over valve 10 etc. in above-described embodiment, these titles are all from the definition functionally provided achieved by these parts, in the design of Hydraulic System of reality, engineering staff can select suitable element according to these functions.In the configuration aspects of hydraulic circuit, before or after direction of travel change-over valve 9 can be arranged on logical valve 7.
Preferably, time delay break-make parts are logical valve 7 or sequence valve, can after the pressure of oil-feed oil circuit reaches setting value, and connection oil-feed oil circuit and drive circuit are to realize walking.In another embodiment, time delay break-make parts are time-delay switch, can lead to after oil reaches Preset Time at oil-feed oil circuit, connect oil-feed oil circuit and drive circuit to realize walking.In other embodiments, time delay break-make parts are automatically controlled on-off valve, and the electromagnetic control signal of this valve is associated with the pressure signal in oil-feed oil circuit.
Preferably, throttle part is flow regulating valve 8 or governor valve.Governor valve has carried out pressure compensated flow regulating valve, is in series by uniform-pressure-drop valve and flow regulating valve, can make not to be subject to load effect by the flow of governor valve.
There is provided better directive function to design this hydraulic efficiency pressure system to those skilled in the art, below in conjunction with a specific embodiment more, to select from connection structure, element and the aspect such as principle of work describes this walking control for brake hydraulic efficiency pressure system in detail.
As shown in Figure 2, in this hydraulic efficiency pressure system, time delay break-make subassembly selection logical valve 7, this logical valve 7 is 2/2-way hydraulic control on-off valve, the control signal of logical valve 7 is the pressure of oil-feed oil circuit, when the pressure of oil-feed oil circuit is greater than the pressure sum of the predetermincd tension of spring in logical valve 7 and oil return circuit, logical valve 7 is in on-state; Throttle part selects flow regulating valve 8; Direction of travel change-over valve 9 is 3 position-5 way solenoid directional control valve, and can carry out off-load when meta; Walking mode change-over valve 10 is two four-way electromagnetic reversing valves.Definition about each hydraulic fluid port in these valves can see Fig. 2.
For the annexation of parts each in this hydraulic efficiency pressure system, brake component is connected with oil inlet P by oil circuit, the A mouth of logical valve 7 is connected with oil inlet P respectively with the A mouth of flow regulating valve 8, and the B mouth of logical valve 7 and the B mouth of flow regulating valve 8 are connected with the E mouth of direction of travel change-over valve 9 and A mouth respectively; The B mouth of direction of travel change-over valve 9 is connected with oil return inlet T 1/T2, and when being in meta, A mouth, B mouth are connected with E mouth; The C1 mouth of the first motor 11 is connected with the C mouth of direction of travel change-over valve 9 and the D mouth of walking mode change-over valve 10 respectively, and the B1 mouth of the first motor 11 is connected with the C mouth of walking mode change-over valve 10; The C2 mouth of the second motor 12 is connected with the B mouth of walking mode change-over valve 10, and the B2 mouth of the second motor 12 is connected with the D mouth of direction of travel change-over valve 9 and the A mouth of walking mode change-over valve 10 respectively.
In addition, brake circuit can be drawn an oil circuit, and the E mouth of this oil circuit as detection mouth, can detect the pressure of brake circuit and drive circuit in real time, to obtain the walking braking mode of scissor aerial work platform, provide foundation for performing other all kinds of action.
Further, in brake circuit, being provided with the interface connecting manual pump, the manual releasing of brake component can be realized by connecting manual pump.
When scissor aerial work platform will start traveling, hydraulic oil is passed into gradually from oil inlet P, when the pressure of oil-feed oil circuit does not reach the setting pressure of logical valve 7, logical valve 7 is in off state, hydraulic oil is made to flow to brake component, brake component is slowly opened, when the pressure of oil-feed oil circuit reaches the setting pressure of logical valve 7, logical valve 7 is connected, hydraulic oil flows to motor by direction of travel change-over valve 9 and walking mode change-over valve 10, thus drive scissor aerial work platform to start to accelerate walking, when the pressure of oil-feed oil circuit reaches the pressure that brake component opens completely, motor is walking at full speed.
Controlled by the combination of direction of travel change-over valve 9 and walking mode change-over valve 10, scissor aerial work platform can be made to realize multiple walking mode, when two motors are connected in series, can reduce while motor bears moment of torsion and improve rotating speed; When two motors are connected in parallel, moment of torsion can be improved while reduction motor rotary speed.
When direction of travel change-over valve 9 and walking mode change-over valve 10 are all in left position, the first motor 11 and the second motor 12 are connected in series, and according to first direction work, first direction are corresponded to the working direction of car load here.
When direction of travel change-over valve 9 is in right position and walking mode change-over valve 10 is in left position, the first motor 11 and the second motor 12 are connected in series, and according to second direction work, second direction are corresponded to the direction of retreat of car load here;
When direction of travel change-over valve 9 is in left position and walking mode change-over valve 10 is in right position, the first motor 11 and the second motor 12 are connected in parallel, and according to first direction work.
When direction of travel change-over valve 9 and walking mode change-over valve 10 are all in right position, the first motor 11 and the second motor 12 are connected in parallel, and according to second direction work.
When scissor aerial work platform will be braked, direction of travel change-over valve 9 is in meta, and stop to hydraulic efficiency pressure system fuel feeding, oil pressure in motor hydraulic oil pipe declines rapidly, and motor rotary speed also decreases, when oil pressure drops to the response pressure of logical valve 7, logical valve 7 is closed, brake component by flow regulating valve 8 oil return, thus makes brake component close reposefully, last car load stop motion.
When scissor aerial work platform break down can not walk time, such as Hydraulic Pump can not fuel feeding smoothly, by manual pump release brake component, scissor aerial work platform is walked, be connected with brake port F by manual pump, the brake action of such brake component is removed, when scissor aerial work platform is subject to external force walking, hydraulic oil gets back to fuel tank by the meta of direction of travel change-over valve 9.Because the Median Function of direction of travel change-over valve 9 is with the function of throttling, when car load is walked, all the time there is back pressure in the return opening of motor, if scissor aerial work platform is on slope, after brake release during revolution because the existence of back pressure can prevent from slipping suddenly car; If scissor aerial work platform is in level land, when artificial promote its walking time, the existence due to back pressure makes its kinematic velocity can not be too fast, and motor can not send abnormal sound.
In addition, the utility model additionally provides a kind of scissor aerial work platform, comprises the walking control for brake hydraulic efficiency pressure system in the various embodiments described above.By walking and the braking of this HYDRAULIC CONTROL SYSTEM scissor aerial work platform, scissor aerial work platform can be made when starting traveling, brake system is slowly unclamped in advance, makes there is certain accelerator in start-up course, thus makes start-up course comparatively steady; Scissor aerial work platform is when braking, and brake system is slowly closed, and making has certain buffer distance in braking procedure, thus make braking procedure comparatively steady, prevent vehicle from tumbling due to inertia, in order to avoid cause safety misadventure, improve reliability and the safe class of car load.In addition, when scissor aerial work platform breaks down, if be parked on slope, then after brake release, car load will with speed motion faster, and avoid motor to send abnormal sound as far as possible.
Further, scissor aerial work platform also needs to perform lifting action and handling maneuver, is also provided with lifting loop and turns to loop, see Fig. 2 before the brake circuit thus in above-mentioned hydraulic efficiency pressure system and drive circuit.
Lifting loop is connected on oil-feed oil circuit, and in lifting loop, be provided with lifting change-over valve 2 and the elevating ram being connected to CSE mouth, lifting change-over valve 2 can control scissor aerial work platform and switch between lifting action and walking motion.Preferably, lifting change-over valve 2 selects two four-way electromagnetic reversing valves, when left position work, and elevating ram attonity, hydraulic oil supplies follow-up execution oil circuit by lifting change-over valve 2; When the work of right position, elevating ram drives scissors mechanism to perform lifting action, like this, just can ensure walking and lifting can not while action, thus ensure the safety that scissor aerial work platform performs an action.
Loop is turned to be connected on oil-feed oil circuit, be provided with pressure-gradient control valve 4, turn to change-over valve 5 and be connected to the steering cylinder of A/B mouth turning in loop, turn to change-over valve 5 can control the rotation direction of steering cylinder, three-position four-way electromagnetic directional valve can be selected, pressure-gradient control valve 4 can control scissor aerial work platform and receive when turning to travel commands at the same time, preferentially performs handling maneuver.The hydraulic fluid port A of pressure-gradient control valve 4 and hydraulic fluid port B are respectively with the C mouth of lifting change-over valve 2 with turn to the A mouth of change-over valve 5 to be connected, and the hydraulic fluid port C of pressure-gradient control valve 4 is connected with the A mouth of logical valve 7 with hydraulic fluid port D mouth.Turning on the oil circuit between the B mouth of change-over valve 5 and the A mouth of logical valve 7 and be also provided with check valve 6, for preventing fluid from refluxing, damage being caused to Hydraulic Elements above.When turning to change-over valve 5 to be in left position or right position, the first action of steering cylinder, and then hydraulic oil is supplied follow-up brake circuit and walking loop, when turning to change-over valve 5 to be in meta, directly hydraulic oil is supplied brake circuit and walking loop.
In order to carry out safety guard-safeguard to system, by pass valve can also be set in hydraulic efficiency pressure system.Preferably, the first by pass valve 1 is set between main oil inlet P and oil return inlet T 2, for protecting working connection.Second by pass valve 3 is set between lifting oil circuit and oil return inlet T 2, for carrying out safety guard-safeguard to lifting loop.
The multiple hydraulic efficiency pressure system embodiment performed an action can be controlled for above-mentioned, when scissor aerial work platform travels, hydraulic oil, through lifting change-over valve 2 and pressure-gradient control valve 4, arrives A mouth and the brake port F of logical valve 7, thus is brake circuit and drive circuit fuel feeding.Same hydraulic efficiency pressure system is adopted to control multiple actuating unit, need to ensure that the action of each actuating unit meets specific logical relation, ensure that lifting action by arranging lifting change-over valve 2 and turn to the alternative with walking motion in this embodiment, ensure that the execution sequence of handling maneuver and walking motion by arranging pressure-gradient control valve 4.
Above one walking control for brake hydraulic efficiency pressure system provided by the utility model and scissor aerial work platform are described in detail.Apply specific embodiment herein to set forth principle of the present utility model and embodiment; the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping, and all employings are equal to the scheme of replacement formation all in the protection domain of this patent.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (12)
1. a walking control for brake hydraulic efficiency pressure system, for controlling walking and the braking of vehicle, it is characterized in that, comprise: be connected to the brake circuit on same oil-feed oil circuit and drive circuit, brake component is provided with in described brake circuit, the drive element of time delay break-make parts, throttle part and driving vehicle to run is provided with in described drive circuit
Described time delay break-make parts are arranged on described oil-feed oil circuit, can connect described oil-feed oil circuit and described drive circuit to realize walking after opening described brake component.
2. walking control for brake hydraulic efficiency pressure system according to claim 1, is characterized in that, described oil-feed oil circuit is provided with collateral branch's oil circuit, and described throttle part is arranged on described collateral branch oil circuit, can carry out throttling governing when braking to the oil return of described brake component.
3. walking control for brake hydraulic efficiency pressure system according to claim 2, it is characterized in that, also comprise direction of travel change-over valve (9), described direction of travel change-over valve (9) is arranged between described time delay break-make parts and described drive element, can control the direction of travel of described vehicle.
4. walking control for brake hydraulic efficiency pressure system according to claim 3, it is characterized in that, the oil inlet (A) of described direction of travel change-over valve (9), be interconnected between return opening (B) and the hydraulic fluid port (E) be communicated with described throttle part, described oil inlet (A) is communicated with the second actuator port (D) respectively by first actuator port (C) of restriction with described direction of travel change-over valve (9) with described return opening (B).
5. according to the arbitrary described walking control for brake hydraulic efficiency pressure system of Claims 1 to 4, it is characterized in that, described drive element comprises: be used for driving the revolver of described vehicle and right first motor (11) of taking turns and the second motor (12) respectively, connected by walking mode change-over valve (10) between described first motor (11) and described second motor (12), described walking mode change-over valve (10) can control described first motor (11) and described second motor (12) realizes connected in series or in parallel.
6. walking control for brake hydraulic efficiency pressure system according to claim 1, it is characterized in that, described time delay break-make parts are logical valve (7) or sequence valve, can after the pressure of described oil-feed oil circuit reaches setting value, connect described oil-feed oil circuit and described drive circuit to realize walking.
7. walking control for brake hydraulic efficiency pressure system according to claim 2, is characterized in that, described throttle part is flow regulating valve (8) or governor valve.
8. walking control for brake hydraulic efficiency pressure system according to claim 1, is characterized in that, being provided with the interface connecting manual pump, can realizing the manual releasing of described brake component by connecting described manual pump in described brake circuit.
9. walking control for brake hydraulic efficiency pressure system according to claim 1, is characterized in that, described time delay break-make parts are time-delay switch, can lead to after oil reaches Preset Time at described oil-feed oil circuit, connects described oil-feed oil circuit and described drive circuit to realize walking.
10. a scissor aerial work platform, is characterized in that, comprise as arbitrary in claim 1 ~ 9 as described in walking control for brake hydraulic efficiency pressure system.
11. scissor aerial work platforms according to claim 10, it is characterized in that, described walking control for brake hydraulic efficiency pressure system also comprises: be connected to the lifting loop on described oil-feed oil circuit, in described lifting loop, be provided with lifting change-over valve (2) and elevating ram, described lifting change-over valve (2) can control described scissor aerial work platform and switch between lifting action and walking motion.
12. scissor aerial work platforms according to claim 11, it is characterized in that, described walking control for brake hydraulic efficiency pressure system also comprises: be connected to and described oil-feed oil circuit turns to loop, be provided with pressure-gradient control valve (4) described turning in loop, turn to change-over valve (5) and steering cylinder, the described rotation direction turning to change-over valve (5) that described steering cylinder can be controlled, described pressure-gradient control valve (4) can control described scissor aerial work platform and receive when turning to travel commands at the same time, preferentially performs handling maneuver.
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CN201520413435.9U CN204801506U (en) | 2015-06-16 | 2015-06-16 | Walking brake control hydraulic system and cut fork aerial working platform |
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CN201520413435.9U CN204801506U (en) | 2015-06-16 | 2015-06-16 | Walking brake control hydraulic system and cut fork aerial working platform |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106314137A (en) * | 2015-06-16 | 2017-01-11 | 徐工集团工程机械股份有限公司 | Walking brake control hydraulic system and shear-fork aerial work platform |
CN109072954A (en) * | 2016-08-17 | 2018-12-21 | 株式会社Kcm | Working truck |
CN114198353A (en) * | 2021-12-31 | 2022-03-18 | 杭叉集团股份有限公司 | Scissor fork type aerial work platform hydraulic control system |
CN114396403A (en) * | 2021-12-31 | 2022-04-26 | 杭叉集团股份有限公司 | Scissor fork type aerial work platform walking control system |
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2015
- 2015-06-16 CN CN201520413435.9U patent/CN204801506U/en not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106314137A (en) * | 2015-06-16 | 2017-01-11 | 徐工集团工程机械股份有限公司 | Walking brake control hydraulic system and shear-fork aerial work platform |
CN106314137B (en) * | 2015-06-16 | 2019-07-23 | 徐工集团工程机械股份有限公司 | A kind of walking control for brake hydraulic system and scissor aerial work platform |
CN109072954A (en) * | 2016-08-17 | 2018-12-21 | 株式会社Kcm | Working truck |
CN109072954B (en) * | 2016-08-17 | 2020-06-09 | 日立建机株式会社 | Working vehicle |
CN114198353A (en) * | 2021-12-31 | 2022-03-18 | 杭叉集团股份有限公司 | Scissor fork type aerial work platform hydraulic control system |
CN114396403A (en) * | 2021-12-31 | 2022-04-26 | 杭叉集团股份有限公司 | Scissor fork type aerial work platform walking control system |
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