CN207433277U - A kind of dual-speed hydraulic running gear - Google Patents
A kind of dual-speed hydraulic running gear Download PDFInfo
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- CN207433277U CN207433277U CN201721555452.1U CN201721555452U CN207433277U CN 207433277 U CN207433277 U CN 207433277U CN 201721555452 U CN201721555452 U CN 201721555452U CN 207433277 U CN207433277 U CN 207433277U
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- electric valve
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Abstract
The utility model discloses a kind of dual-speed hydraulic running gears, including hydraulic pump and hydraulic motor, it is connected with to adjust the first solenoid electric valve of the speed of travel between hydraulic pump and hydraulic motor, hydraulic motor can two point variables, realize variable speed, according to different operating modes, the requirement of the different speeds of travel is realized；The second solenoid electric valve for emergency braking is provided on hydraulic pump, it can be achieved that the emergency brake of running gear, it is ensured that walking is safe, and the pivot turn of running gear can be realized by control handle, can freely walk in the region of narrow space.The system has many advantages, such as that integrated level is high, compact-sized, control is flexible, feature-rich, is a set of economic and environment-friendly, reliability and durability Hydraulic Power Transmission System.
Description
Technical field
The utility model belongs to running gear structure-design technique field, specifically designs a kind of dual-speed hydraulic running gear.
Background technology
Automobile and tractor running gear is to become the driving torque that engine is passed on driving wheel to promote automobile and tractor
The driving force of form, and the rotation of driving wheel is made to become the movement of automobile and tractor on the ground, ensure that automobile is drawn as far as possible
The ride comfort of machine traveling.
Running gear is mainly using Hydrostatic-mechanical Transmission, the shapes such as hydraulic drive, machine driving, electric transmission in traditional technology
Formula, mostly based on machine driving, so-called machine driving refers to from engine to wheel walking transmission system currently on the market
Actuated element uses mechanical part, generally comprises clutch, gearbox, transmission shaft etc., but machine driven system is inconvenient, and
Stationarity is poor.
The advantages that it is big that hydraulic drive possesses transmission power, flexible arrangement, easily controllable, stable drive and widely made
With.But it there is no the appearance of multiple functional a whole set of hydraulic travel system in current running gear.Running gear mainly includes straight
Line walking accelerates the methods of operation such as walking and steering, but traditional running gear structure can not realize the stepless of running gear
Speed change, and when turning to larger space is needed to turn and turn around for it or even the operation of multiple forward-reverse is needed to come in fact
Existing, control is inconvenient, can not freely walk in cell domain space.
Therefore, in view of problem above, it is necessary to a kind of higher hydraulic travel system of integrated level is proposed, during realizing walking
Variable speed, improve the stationarity in walking, and facilitate speed regulating control, while meet the requirement of pivot turn.
Utility model content
In view of this, the utility model provides a kind of dual-speed hydraulic running gear, and running gear passes through hydraulic drive, behaviour
Facilitate, and by the way that solenoid electric valve is set to control the output of slippage pump pressure oil, it is convenient to realize variable speed when walking
Speed regulating control improves the stationarity in walking, while meets the requirement of pivot turn.
A kind of dual-speed hydraulic running gear that purpose according to the present utility model proposes, including hydraulic pump and the hydraulic pressure
The hydraulic motor and speed reducer of pump drive connection are connected with to adjust walking speed between the hydraulic pump and the hydraulic motor
First solenoid electric valve of degree, the first solenoid electric valve both ends connect the change of the slippage pump and hydraulic motor of hydraulic pump respectively
Measure cylinder；
During normal walking, hydraulic energy is converted to mechanical energy and turned by hydraulic pump output hydraulic pressure oil to hydraulic motor, hydraulic motor
Speed and torque, export after being slowed down afterwards by speed reducer, and the first solenoid electric valve is off-state at this time；When accelerating walking, the
One solenoid electric valve connects, the variable cylinder of the pressure oil introducing hydraulic motor of slippage pump, and the angle change of swash plate, subtracts in variable cylinder
Small displacement is realized and accelerates walking.
Preferably, first solenoid electric valve is two-position two-way solenoid valve, during the first solenoid electric valve no power, repairing
Pump is not connected with the variable cylinder of hydraulic motor, and hydraulic motor is operated according to normal speed；When first solenoid electric valve is powered, repairing
Pump is connected with the variable cylinder of hydraulic motor, hydraulic motor accelerated service.
Preferably, the hydraulic travel system drives running gear for two, including two groups of hydraulic pumps being arranged in series and hydraulic pressure
Motor, two groups of hydraulic motors are disposed opposite to each other, and the both sides of corresponding driving running gear, are provided with swash plate in the hydraulic pump, institute
It states and operation handle is provided on hydraulic pump, when both sides operation handle operates forward or backwards simultaneously, the swash plate in two groups of hydraulic pumps
It turns on the contrary, realize that walking mechanism is advanced or retreated, during the operation handle one side forward direction one side reverse operating, two groups of hydraulic pumps
Interior swash plate turns to identical, walking mechanism one side advance one side retrogressing, running gear pivot turn.
Preferably, swash plate is provided in the hydraulic pump, the swash plate is driven by a variable cylinder, on the hydraulic pump also
It is provided with the second solenoid electric valve for being used to implement emergency braking, sets that there are two the on the valve body of second solenoid electric valve
One oil circuit hole is opened up on the both ends of variable cylinder there are two the second oil circuit hole, and the second oil circuit hole is connected to the cavity at variable cylinder both ends
Interior, two the first oil circuit holes are corresponding respectively with two the second oil circuit holes and connect；During normal work, two the first oil circuit holes do not connect
It is logical, when promptly returning middle, two the first oil circuit holes connections so that the cavity connection at variable cylinder both ends, both ends cavity internal pressure is equal,
Variable cylinder driving swash plate returns to zero pivot angle, promptly returns to middle position.
Preferably, second solenoid electric valve is two-position two-way solenoid valve, during the second solenoid electric valve no power, two
First oil circuit hole does not connect, hydraulic pump normal work；When second solenoid electric valve is powered, two the first oil circuit hole connections are described
The cavity connection at variable cylinder both ends, both ends cavity internal pressure is equal, and variable cylinder driving swash plate returns to zero pivot angle, in promptly returning to
Position.
Preferably, an oil circuit is added outside the hydraulic pump, second solenoid electric valve is arranged on the oil circuit, institute
The both ends for stating oil circuit are connected to two the second oil circuit holes.
Preferably, second solenoid electric valve is arranged at the outside of hydraulic pump, and is set independently of hydraulic pump.
Preferably, the friction plate for parking braking is additionally provided on the hydraulic motor.
Compared with prior art, it is the advantages of dual-speed hydraulic running gear disclosed in the utility model：
1) system is made of hydraulic pump, hydraulic motor and speed reducer, solenoid electric valve, has integrated level height, structure
It is compact, control it is flexible, feature-rich the advantages that, which can be widely applied to the walking machines such as wheeled, crawler type, be a set of warp
Ji environmental protection, reliability and durability Hydraulic Power Transmission System.
2) hydraulic motor can two point variables, can realize the requirement of the different speeds of travel according to different operating modes, realize stepless change
Speed meets straight line moving, pivot turn, the walking requirement of service brake.
3) hydraulic system realizes the purpose of walking machine pivot turn by manipulating the direction of rotation of hydraulic pump handle,
It can freely walk in the region of narrow space.
4) solenoid electric valve is integrated on hydraulic pump, it can be achieved that the emergency brake of running gear, it is ensured that running gear safety.
5) system is equipped with friction plate, it can be achieved that parking braking, meets the safety stop of walking machine.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structure diagram of dual-speed hydraulic running gear disclosed in the utility model.
The title of digital or alphabetical representative corresponding component in figure：
10th, hydraulic pump 20, hydraulic motor 30, speed reducer
11st, the first solenoid electric valve 12, the second solenoid electric valve 13, variable cylinder 14, slippage pump
21st, variable cylinder 22, friction plate
Specific embodiment
Just as described in the background section, walking transmission system currently on the market there is no work(mostly based on machine driving
The appearance of a whole set of hydraulic travel system that can be complete, can not realize the variable speed and pivot turn of running gear.
The utility model is directed to deficiency of the prior art, provides a kind of dual-speed hydraulic running gear, running gear is led to
Hydraulic drive is crossed, it is easy to operate, and by the way that solenoid electric valve is set to control the output of slippage pump pressure oil, when being walked with realizing
Variable speed facilitates speed regulating control, improves the stationarity in walking, while meets the requirement of pivot turn.
The technical solution of the utility model will be clearly and completely described by specific embodiment below.Obviously,
The described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.Based on the utility model
In embodiment, the every other implementation that those of ordinary skill in the art are obtained without creative efforts
Example, shall fall within the protection scope of the present invention.
Fig. 1 is referred to, Fig. 1 discloses the utility model preferred forms, contains variable speed, the original of running gear
Ground is turned and the functions such as emergency braking, also can be only by variable speed and pivot turn or emergency braking knot in other embodiment
It closes, is not limited specifically.
As shown in the figure, a kind of dual-speed hydraulic running gear, the hydraulic pressure horse being sequentially connected including hydraulic pump 10, with hydraulic pump 10
Up to 20 and speed reducer 30, it is connected with to adjust the first solenoid electric valve of the speed of travel between hydraulic pump 10 and hydraulic motor 20
11,11 both ends of the first solenoid electric valve connect the slippage pump 14 of hydraulic pump 10 and the variable cylinder 21 of hydraulic motor 20 respectively；Normally
During walking, for 10 output hydraulic pressure oil of hydraulic pump to hydraulic motor 20, hydraulic energy is converted to mechanical energy rotating speed and torsion by hydraulic motor 20
Square exports after being slowed down afterwards by speed reducer 30, and the first solenoid electric valve 11 is off-state at this time；When accelerating walking, first
Solenoid electric valve 11 connects, the variable cylinder 21 of the pressure oil introducing hydraulic motor 20 of slippage pump 14, the angle of swash plate in variable cylinder 21
Degree variation, reduces discharge capacity, so as in the case where input flow rate is constant, improve the output speed of hydraulic motor, walking machine speed
Degree is inherently derived promotion.
Preferably, the first solenoid electric valve is 11 two-position two-way solenoid valves, during the first 11 no power of solenoid electric valve, repairing
Pump 14 is not connected with the variable cylinder 21 of hydraulic motor, and hydraulic motor 20 is operated according to normal speed；First solenoid electric valve 11 is logical
When electric, slippage pump 14 is connected with the variable cylinder 21 of hydraulic motor 20,20 accelerated service of hydraulic motor, realizes the mesh of stepless speed regulation
, ensure running gear traveling comfort.
Preferably, hydraulic travel system drives running gears for two, including two groups of hydraulic pumps 10 being arranged in series and with two
Two groups of hydraulic motors 20 of group hydraulic pump driving connection, two groups of hydraulic motors 20 are disposed opposite to each other, and corresponding driving running gear
Both sides are correspondingly arranged swash plate 1, swash plate 2 in two hydraulic pumps 10, operation handle (not shown), both sides are provided on hydraulic pump 10
Operation handle manipulates the hydraulic pump of both sides respectively, when both sides operation handle operates forward or backwards simultaneously, two groups of hydraulic pumps 10
Interior swash plate 1, swash plate 2 are turned on the contrary, realizing that walking mechanism is advanced or retreated, when operation handle one side forward direction one side reverse operating
When, swash plate 1, swash plate 2 in two groups of hydraulic pumps 10 turn to identical, and walking mechanism one side advance one side retreats, and realizes running gear
Pivot turn.Specific control mode is as follows：
Under the operation of 10 operation handle of hydraulic pump, when swash plate 1 rotates clockwise, oil circuit 1 is high-pressure oil passage, drives one
Side hydraulic motor 20 rotates counterclockwise, is finally exported clockwise by speed reducer 30, at this point, swash plate 2 rotates counterclockwise, oil circuit 4 is
High-pressure oil passage, driving opposite side hydraulic motor 20 rotate clockwise, and are finally exported counterclockwise by speed reducer 30, due to two hydraulic pressure
Motor is back-to-back installation, therefore, final to realize that walking machine moves ahead, and when aforesaid operations are reversed simultaneously, oil circuit 2 is high pressure oil
Road, oil circuit 3 are high-pressure oil passage, and walking machine retreats, and realize the straight ahead of running gear and the function of retreating.
And when swash plate 1 and swash plate 2 are clockwise or counterclockwise, final walking machine is left-hand bend or turns right
It is curved.In practical operation, during turning, operation handle in certain angle, at this point, the swash plate of one of hydraulic pump may proceed to by
Same direction rotates, and another swash plate then reversely rotates, and with the increase of the two angle, turning speed then can gradually be accelerated, for example,
When walking machine moves ahead, swash plate 1 is clockwise, it will continue toward rotating clockwise, and up to maximum, and swash plate 2 is initially counterclockwise,
During turning, then toward rotating clockwise, such walking machine starts to turn, until turning speed is maximum, realizes running gear original place
The function of turning meets running gear and freely walks in the region of narrow space.
Further, by taking unilateral hydraulic pump as an example, swash plate 1 is provided in hydraulic pump 10, swash plate 1 is driven by a variable cylinder 13
It is dynamic, the second solenoid electric valve 12 for being used to implement emergency braking, the valve of the second solenoid electric valve 12 are additionally provided on hydraulic pump 10
It is set on body there are two the first oil circuit hole (not shown), opens up on the both ends of variable cylinder 13 and (do not show there are two the second oil circuit hole
Go out), the second oil circuit hole is connected in the cavity at variable cylinder both ends, and two the first oil circuit holes and two the second oil circuit holes are corresponding respectively
And connect, i.e. two the first oil circuit holes of the second solenoid electric valve 12 are respectively communicated in two cavitys of variable cylinder 13.Normally
During work, two the first oil circuit holes do not connect, i.e., the second solenoid electric valve 12 does not work to variable cylinder.When in urgent time, two
A first oil circuit hole connection so that the cavity connection at variable cylinder both ends, both ends cavity internal pressure is equal, in the effect of return spring
Under, variable cylinder 13 drives swash plate 1 to return to zero pivot angle, promptly returns to middle position, realizes the function of running gear driving emergency braking.It passes
In the hydraulic system of system by servo valve brake, when servo valve failure can not return to middle position when, can pass through second electricity
Magnetic control valve promptly returns to middle position, realizes the urgent effective brake of running gear, improves the security performance of vehicle, reduce master
The economic loss of machine.
Preferably, the second solenoid electric valve 12 is two-position two-way solenoid valve, during the second 12 no power of solenoid electric valve, two
First oil circuit hole does not connect, and hydraulic pump 10 works normally；When second solenoid electric valve 12 is powered, two the first oil circuit hole connections,
The cavity connection at the variable cylinder both ends, both ends cavity internal pressure is equal, and variable cylinder driving swash plate returns to zero pivot angle, promptly returns to
Middle position.In this scenario, braking is realized only when the second solenoid electric valve is powered, the second solenoid electric valve is disconnected during normal work
Electricity condition, thus it is more energy saving.First solenoid electric valve is likewise supplied with the characteristic.
Preferably, 10 outside of hydraulic pump can add an oil circuit, and the second solenoid electric valve 12 is arranged on the oil circuit, and is controlled
The break-make on liquefaction road.
Preferably, the second solenoid electric valve 12 is arranged at the outside of hydraulic pump 10, and is set independently of hydraulic pump 10.It can be
It is spare during the servo valve failure of hydraulic pump, it also can directly be controlled and braked by the second solenoid electric valve.Due to the second Electromagnetic Control
Valve is set independently of hydraulic pump, so even the failure of the second solenoid electric valve will not cause shadow to the use of hydraulic pump
It rings, repair and replacement are convenient.
In addition, being additionally provided with the friction plate 22 for parking braking on hydraulic motor 20, the function of forming braking is realized.
To sum up, which is made of hydraulic series double pump, hydraulic motor and speed reducer, solenoid electric valve, has
The advantages that integrated level is high, compact-sized, control is flexible, feature-rich, which can be widely applied to the walkings such as wheeled, crawler type
Machinery is a set of economic and environment-friendly, reliability and durability Hydraulic Power Transmission System.The system is by changing the swash plate angle of hydraulic series double pump
Degree realizes variable speed, meets straight line moving, pivot turn, the walking requirement of service brake.The control mode of hydraulic pump can hand
Control, hydraulic control, can also be automatically controlled, and mode is flexible and changeable, can be according to different clients demand custom-made.Meanwhile it is integrated on hydraulic pump
Solenoid electric valve is, it can be achieved that the emergency brake of walking machine, it is ensured that walking machine safety.And hydraulic motor can two point variables, can
According to different operating modes, different speed of travel requirements are realized, meanwhile, friction plate is equipped with, it can be achieved that parking braking, meets vehicle with walking machine
The safety stop of tool.The hydraulic system is reversely rotated by changing hydraulic pump handle and walking machine pivot turn can be achieved, can be
It freely walks in the region of narrow space.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or new using this practicality
Type.A variety of modifications of these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (8)
- A kind of 1. dual-speed hydraulic running gear, which is characterized in that the hydraulic pressure horse being connected including hydraulic pump, with the hydraulic pump driving It reaches and speed reducer, is connected with to adjust the first Electromagnetic Control of the speed of travel between the hydraulic pump and the hydraulic motor Valve, the first solenoid electric valve both ends connect the slippage pump of hydraulic pump and the variable cylinder of hydraulic motor respectively；During normal walking, hydraulic pump output hydraulic pressure oil to hydraulic motor, hydraulic motor by hydraulic energy be converted to mechanical energy rotating speed and Torque exports after being slowed down afterwards by speed reducer, and the first solenoid electric valve is off-state at this time；When accelerating walking, the first electricity Magnetic control valve connects, the variable cylinder of the pressure oil introducing hydraulic motor of slippage pump, and the angle change of swash plate, reduces row in variable cylinder Amount is realized and accelerates walking.
- 2. dual-speed hydraulic running gear according to claim 1, which is characterized in that first solenoid electric valve is two Two-way electromagnetic valve, during the first solenoid electric valve no power, slippage pump is not connected with the variable cylinder of hydraulic motor, hydraulic motor according to Normal speed operates；When first solenoid electric valve is powered, slippage pump is connected with the variable cylinder of hydraulic motor, and hydraulic motor accelerates fortune Turn.
- 3. dual-speed hydraulic running gear according to claim 1, which is characterized in that the hydraulic travel system drives for two and goes Walking system, including two groups of hydraulic pumps being arranged in series and hydraulic motor, two groups of hydraulic motors are disposed opposite to each other, and corresponding driving walking The both sides of system are provided with swash plate in the hydraulic pump, operation handle are provided on the hydraulic pump, both sides operation handle is simultaneously When operating forward or backwards, the swash plate in two groups of hydraulic pumps is turned on the contrary, realizing that walking mechanism is advanced or retreated, the manipulator During the reverse operating of handle one side forward direction one side, the swash plate in two groups of hydraulic pumps turns to identical, walking mechanism one side advance one side retrogressing, Running gear pivot turn.
- 4. dual-speed hydraulic running gear according to claim 1, which is characterized in that swash plate is provided in the hydraulic pump, The swash plate is driven by a variable cylinder, and the second Electromagnetic Control for being used to implement emergency braking is additionally provided on the hydraulic pump Valve is set on the valve body of second solenoid electric valve there are two the first oil circuit hole, opens up that there are two the on the both ends of variable cylinder Two oil circuit holes, the second oil circuit hole are connected in the cavity at variable cylinder both ends, two the first oil circuit holes and two the second oil circuit holes point It Dui Ying and not connect；During normal work, two the first oil circuit holes do not connect, and when promptly returning middle, two the first oil circuit holes connections make The cavity connection at variable cylinder both ends is obtained, both ends cavity internal pressure is equal, and variable cylinder driving swash plate returns to zero pivot angle, in promptly returning to Position.
- 5. dual-speed hydraulic running gear according to claim 4, which is characterized in that second solenoid electric valve is two Two-way electromagnetic valve, during the second solenoid electric valve no power, two the first oil circuit holes do not connect, hydraulic pump normal work；Second electricity When magnetic control valve is powered, two the first oil circuit hole connections, the cavity connection at the variable cylinder both ends, both ends cavity internal pressure phase Zero pivot angle is returned to Deng, variable cylinder driving swash plate, promptly returns to middle position.
- 6. dual-speed hydraulic running gear according to claim 4 a, which is characterized in that oil is added outside the hydraulic pump Road, second solenoid electric valve are arranged on the oil circuit, and the both ends of the oil circuit are connected to two the second oil circuit holes.
- 7. dual-speed hydraulic running gear according to claim 4, which is characterized in that second solenoid electric valve is arranged at The outside of hydraulic pump, and set independently of hydraulic pump.
- 8. according to claim 1-7 any one of them dual-speed hydraulic running gears, which is characterized in that on the hydraulic motor also It is provided with the friction plate for parking braking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721555452.1U CN207433277U (en) | 2017-11-20 | 2017-11-20 | A kind of dual-speed hydraulic running gear |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721555452.1U CN207433277U (en) | 2017-11-20 | 2017-11-20 | A kind of dual-speed hydraulic running gear |
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| Publication Number | Publication Date |
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| CN207433277U true CN207433277U (en) | 2018-06-01 |
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ID=62286545
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721555452.1U Active CN207433277U (en) | 2017-11-20 | 2017-11-20 | A kind of dual-speed hydraulic running gear |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107776401A (en) * | 2017-11-20 | 2018-03-09 | 力源液压（苏州）有限公司 | A kind of dual-speed hydraulic running gear |
-
2017
- 2017-11-20 CN CN201721555452.1U patent/CN207433277U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107776401A (en) * | 2017-11-20 | 2018-03-09 | 力源液压（苏州）有限公司 | A kind of dual-speed hydraulic running gear |
| CN107776401B (en) * | 2017-11-20 | 2024-05-17 | 力源液压（苏州）有限公司 | Double-speed hydraulic traveling system |
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