CN108980334A - A kind of heavy load truck and its gearbox gear-shift steerable system - Google Patents
A kind of heavy load truck and its gearbox gear-shift steerable system Download PDFInfo
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- CN108980334A CN108980334A CN201811160507.8A CN201811160507A CN108980334A CN 108980334 A CN108980334 A CN 108980334A CN 201811160507 A CN201811160507 A CN 201811160507A CN 108980334 A CN108980334 A CN 108980334A
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- Prior art keywords
- gear
- shift
- control unit
- gearbox
- valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
- F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention discloses a kind of gearbox gear-shift steerable systems, including being connected to the compressed air source unit for supplying gas and with compressed air source unit, the Pneumatic valve to realize gear switch, it further include judging set on the shift signal between compressed air source unit and Pneumatic valve, for acquiring driver and when collecting shift signal whether Pneumatic valve should execute the control unit of gear-change operation and connect with control unit, the feedback section to receive the standby signal issued after control unit judges, can feedback section according to standby signal to prompt driver carry out gear switching operation.The invention also discloses a kind of heavy load trucks including above-mentioned gearbox gear-shift steerable system.Above-mentioned steerable system structure is simple, easy to accomplish, can prompt driver when can be with gear shift; and when driver's maloperation; control unit can not execute maloperation instruction by logic calculation yet, to reach protection gearbox, extend the effect of gearbox service life.
Description
Technical field
The present invention relates to gearbox control technology field, in particular to a kind of gearbox gear-shift steerable system.The present invention is also
It is related to a kind of heavy load truck with the gearbox gear-shift steerable system.
Background technique
In heavy type lorry transmission-gear box, shift control generally has single H operating mechanism and double H operating mechanisms.
Double H operating mechanisms are made of two H operating mechanisms in parallel, and this operating mechanism is safe and reliable, and gear is clearly bright
Really, it wrong will not hang and accidentally hang gear, but gear shift stroke increases, driver selects gear shift labor intensity larger.Single H operating mechanism only has 1
A H operating mechanism, rear cabinet are to control Pneumatic valve by driver's manual manipulation pre-selection formula handle valve to realize gear shift, with band
For 9 grades of casees of hill gear, as shown in FIG. 1, FIG. 1 is the gear schematic diagrames of list H operating mechanism in the prior art；Single H manipulation
1 grade of mechanism 01 and 5 grades in the same position, driver's manual manipulation preselects formula handle valve to control Pneumatic valve, pushes rear cabinet
Planetary gear converts the transformation to realize gear.Driver is possible in 1 file location, and direct manual manipulation preselects formula hand
Handle valve controls Pneumatic valve to top grade, directly changes to 1 grade at this time, causes vehicle flame-out, transmission internal damage.Vice versa,
Driver is possible in 5 file location, and direct manual manipulation preselects formula handle valve to control Pneumatic valve to low grade, at this time directly
1 grade is changed to, causes vehicle flame-out, transmission internal damage.As shown in Figures 2 and 3, Fig. 2 is transmission internal in the prior art
Gear shift diagram, Fig. 3 are the schematic illustration of list H operating mechanism in the prior art；Single H operating mechanism 01 is that driver passes through
Pre-selection formula handle valve handle is stirred up and down, realizes the high and low shift switching of rear cabinet.Normal operating process is pre-selection formula handle valve 02
Handle shifting block successively shift up in low grade, and from gear 1 to gear 4, when needing to 5 grades, driver first moved back from 4 grades shelves to
Then neutral gear hangs 5 grades again, then successively shifts up from gear 5 to gear 6, otherwise downshift.But during manipulation, such as
For fruit in 1 file location, there is maloperation in driver, stirs the handle shifting block of pre-selection formula handle valve 02 to top grade, this when
It is possible to from 1 grade directly to 5 grades, so that truck can stop working, gearbox can also be damaged.Otherwise it directly can also be put out to 1 grade from 5 grades
Fire, gearbox can also damage.Simultaneously when from changing to 4 grades for 5 grades, since rear cabinet speed ratio difference is larger, the excessively high situation of speed
Under hang from high-grade area toward low-grade area, be easily damaged rear odd-side, entire gearbox caused to scrap when serious.(1 to 4 grades in low grade
Area, 5 to 8 grades in high-grade area)
Therefore, how to avoid causing gearbox damage to be that those skilled in the art need at present due to driver's maloperation
The technical issues of solution.
Summary of the invention
The object of the present invention is to provide a kind of gearbox gear-shift steerable system, which can be to driving
The person of sailing provides gear shift and prompts and provide whether execute gear-change operation instruction by logic analysis calculating, accurately changes so as to realize
Shelves, extend the service life of gearbox.It include above-mentioned gearbox gear-shift steerable system it is a further object of the present invention to provide one kind
Heavy load truck.
To achieve the above object, the present invention provides a kind of gearbox gear-shift steerable system, including the gas to supply gas
Source device and it is connected with the compressed air source unit, the Pneumatic valve to realize gear switch, further includes being set to the compressed air source unit
Shift signal between the Pneumatic valve, for acquiring driver simultaneously judges the Pneumatic valve when collecting shift signal
The control unit of gear-change operation whether should be executed and connect with the control unit, issued after the control unit judges to receive
Standby signal feedback section, the feedback section to according to standby signal prompt driver can carry out gear switching operation.
It preferably, further include the gas on-off that is connect with the control unit, for controlling the compressed air source unit to control
State the electrically-controlled valve of Pneumatic valve.
Preferably, the electrically-controlled valve is specially two position three-way valve, and the two position three-way valve has when power is off that air inlet is not
First working condition of connection and the second working condition that air inlet is connected to gas outlet when energized.
Preferably, the feedback section is specially LED signal lamp.
It preferably, further include being connected with the control unit, to detect vehicle speed and feedback signal to the control unit
Velocity sensor.
Preferably, further include to control gear be in neutral gear or non-neutral state neutral switch and with the control
Portion processed is connected, the neutral position sensor to detect the neutral switch and feedback signal to the control unit.
Preferably, further include to control gear be in high-grade or Low gear state height gear switch and with the control
Portion processed is connected, the high and low shift sensor to detect the height gear switch and feedback signal to the control unit.
The present invention also provides a kind of heavy load trucks, including gearbox gear-shift steerable system described in any of the above embodiments.
Relative to above-mentioned background technique, the present invention is required for the different of gearbox gear-shift steerable system, in the prior art
On the basis of improve gearbox gear-shift steerable system structure, the system can prompt driver when can with gear shift, and
And when maloperation occurs in driver, system no longer executes the gear-change operation；During manipulation, for example, if gear is 1
When file location, there is maloperation in driver, stirs the handle shifting block of pre-selection formula handle valve to top grade, be possible to this when from
1 grade directly to 5 grades, so that truck can stop working, gearbox can be damaged；Otherwise directly can also it stop working to 1 grade from 5 grades, gearbox
It can damage.Therefore, it can prompt when driver with gear shift and can avoid leading due to driver's maloperation using one kind
Cause the shift control system of gearbox damage necessary.
Specifically, which includes compressed air source unit and Pneumatic valve, and compressed air source unit can be to being
System supply gas, Pneumatic valve are connected with compressed air source unit and can be realized the switching of gear, and gearbox gear-shift steerable system further includes
Control unit and feedback section, wherein control unit is set between compressed air source unit and Pneumatic valve, when driver's gear shift, control unit energy
The shift signal for enough acquiring driver, the signal from gearbox is further acquired when collecting shift signal and is able to carry out
Logic analysis is calculated to judge whether Pneumatic valve should execute the gear-change operation；Feedback section connect with control unit and can receive control
Can portion processed standby signal for issuing after judgement, further, feedback section can prompt driver into according to standby signal
The handover operation of row gear.That is, on the one hand, feedback section can prompt driver when may be used according to standby signal
With gear shift, when it is unable to gear shift；On the other hand, when driver carries out gear-change operation, control unit can acquire required letter
Number and whether analyze the operation by logic calculation reasonable, if rationally, the state by controlling Pneumatic valve is changed to execute
Shelves operation, if unreasonable, i.e., the gear-change operation can damage gearbox, then control unit can pass through the shape of switching Pneumatic valve
State, to not execute the operation.The gearbox gear-shift steerable system structure is simple, easy to accomplish, while can prompt driver
When can be with gear shift, and when driver's maloperation, control unit also can not execute maloperation by logic calculation
Instruction extends the effect of gearbox service life so as to reach protection gearbox.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the gear schematic diagram of list H operating mechanism in the prior art；
Fig. 2 is transmission internal gear shift diagram in the prior art；
Fig. 3 is the schematic illustration of list H operating mechanism in the prior art；
Fig. 4 is a kind of schematic illustration of gearbox gear-shift steerable system disclosed by the embodiments of the present invention.
Wherein:
1- compressed air source unit, 2- preselect formula handle valve, 3- Pneumatic valve, 4- electrically-controlled valve, 5- control unit, 6- velocity sensor, 7-
Neutral position sensor, 8- cylinder-piston assembly, 9- high and low shift sensor, 10- feedback section.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Core of the invention is to provide a kind of gearbox gear-shift steerable system, which can be to driving
The person of sailing provides gear shift and prompts and provide whether execute gear-change operation instruction by logic analysis calculating, accurately changes so as to realize
Shelves, extend the service life of gearbox.It includes above-mentioned gearbox gear-shift steerable system that another core of the invention, which is to provide a kind of,
Heavy load truck.
In order to make those skilled in the art more fully understand the present invention program, with reference to the accompanying drawing and it is embodied
The present invention is described in further detail for mode.
Referring to FIG. 4, Fig. 4 is a kind of schematic illustration of gearbox gear-shift steerable system disclosed by the embodiments of the present invention.
Gearbox gear-shift steerable system provided by the embodiment of the present invention include compressed air source unit 1, pre-selection formula handle valve 2 and
Pneumatic valve 3, wherein compressed air source unit 1 can supply gas to system to realize the on-off of control valve；Pneumatic valve 3 and compressed air source unit 1
It is connected and can be realized the switching of gearbox-gear, Pneumatic valve 3 is specially the two-position five-way valve of guide's gas control, and first air guide comes from
Pre-selection formula handle valve 2 controls air inlet and air outlet connection, when having first air guide, air inlet P and gas outlet by guide's gas source
A connection, when without first air guide, air inlet T is connected to gas outlet B.
Pre-selection formula handle valve 2 is set between compressed air source unit 1 and Pneumatic valve 3, and the effect of pre-selection formula handle valve 2 is can to control
Pneumatic valve 3 is simultaneously at different working conditions, and pre-selection formula handle valve 2 is specially two position three-way valve, and driver passes through manipulation
The switching (1 to 4 grades are in low-grade area, and 5 to 8 grades in high-grade area) for switching to realize gear on handle valve, when high-grade, air inlet
Mouth P is not connected to, and when low-grade, air inlet P is connected to gas outlet A.
In the present embodiment, gearbox gear-shift steerable system further includes control unit 5 and feedback section 10, wherein control unit 5
Between compressed air source unit 1 and Pneumatic valve 3, when driver's gear shift, control unit 5 can acquire the shift signal of driver, when
The signal from gearbox, including speed signal, neutral gear signal and high and low shift letter are further acquired when collecting shift signal
Number, and be able to carry out logic analysis and calculate to judge whether Pneumatic valve 3 should execute the gear-change operation；Feedback section 10 and control unit
5 connect and can receive the standby signal that control unit 5 issues after judgement, and further, feedback section 10 can be according to prompt
Can signal prompt driver carry out the handover operation of gear.
That is, on the one hand, feedback section 10 can be prompted according to standby signal driver when can with gear shift,
When gear shift is unable to；On the other hand, when driver carries out gear-change operation, control unit 5 can acquire desired signal and lead to
Whether crossing logic calculation, to analyze the operation reasonable, if rationally, gear shift behaviour is executed by controlling the state of Pneumatic valve 3
Make, if unreasonable, i.e., the gear-change operation can damage gearbox, then control unit can by switch Pneumatic valve 3 state, from
Without executing the operation, gearbox can be protected in this way, achieve the purpose that extend gearbox service life.
Specifically, gearbox gear-shift steerable system further includes electrically-controlled valve 4, electrically-controlled valve 4 connect with control unit 5 and can control
The on-off of the gas of compressed air source unit 1 processed controls Pneumatic valve 3.Electrically-controlled valve 4 controls gas by the current signal that gearbox provides
The on-off in source, electrically-controlled valve 4 is specially two position three-way valve, and when power-off, two position three-way valve is in the first working condition, i.e. air inlet P
It is not connected to gas outlet A, at this point, electrically-controlled valve 4 is in close state, the gas from compressed air source unit 1 not can enter Pneumatic valve 3,
To can not achieve the switching of gear；When energization, two position three-way valve is in the second working condition, i.e. air inlet P and gas outlet A connect
Logical, at this point, electrically-controlled valve 4 is in the open state, the gas from compressed air source unit 1 is able to enter Pneumatic valve 3, to realize gear
Switching.
Control unit 5 is connected with electrically-controlled valve 4, and control unit 5 can acquire the coherent signal on gearbox, including speed signal,
Neutral gear signal and high and low shift signal, to control the on-off of electrically-controlled valve 4.
In order to optimize above-described embodiment, feedback section 10 can be set to LED signal lamp, and there are two types of different for LED signal lamp tool
Working condition and be used to prompt driver whether can carry out pre-selection formula handle valve 2 high and low shift switching, the first work shape
State is that LED signal lamp is shown in red, that is, indicates the high and low shift switching that not can be carried out pre-selection formula handle valve 2, second of work shape
State is that LED signal lamp is shown in green, that is, indicates the high and low shift switching that can be carried out pre-selection formula handle valve 2.
On the basis of the above, gearbox gear-shift steerable system further includes velocity sensor 6, velocity sensor 6 and control unit 5
It is connected, velocity sensor 6 is able to detect the speed of vehicle and feeds back the signal to control unit 5.
Gearbox gear-shift steerable system further includes neutral switch and neutral position sensor 7, neutral position sensor 7 and 5 phase of control unit
Even, whether neutral position sensor 7 is able to detect neutral switch in shelves, i.e. detection gear is in neutral state or non-neutral state
And the signal is fed back to control unit 5.
Gearbox gear-shift steerable system further includes height gear switch and high and low shift sensor 9, high and low shift sensor 9 and control
Portion 5 is connected, and high and low shift sensor 9 is able to detect height gear switch and is in high-grade state or Low gear state and feeds back the signal
To control unit 5.
In addition, gearbox gear-shift steerable system further includes cylinder-piston assembly 8, cylinder-piston assembly 8 has low-grade air inlet
Mouth and high-grade air inlet, low-grade air inlet are connected to the P of Pneumatic valve 3 mouth, A mouthfuls, the T mouth of high-grade air inlet and Pneumatic valve 3, B mouthfuls
Connection；That is, gas source enters the low-grade air inlet of cylinder-piston assembly 8 and pushes away when the P of Pneumatic valve 3 mouth, A mouthfuls of connections
Cylinder take offence to low gear position, to realize that rear cabinet shifts into low grade；When the T of Pneumatic valve 3 mouth, B mouthfuls of connections, gas source enters cylinder
The high-grade air inlet and pusher cylinder of piston component 8 are to high file location, to realize that rear cabinet shifts into top grade.
Correspondingly, cylinder-piston assembly 8 is connect with height gear switch, and high and low shift sensor 9 acquires height gear switch in real time
In shelves state and feedback signal is to control unit 5.
So, the gas supply of compressed air source unit 1 is passed to pre-selection formula handle valve 2 and electrically-controlled valve 4, the acquisition of control unit 5 from speed
The signal of sensor 6, neutral position sensor 7 and high and low shift sensor 9 controls the on-off of electrically-controlled valve 4 by logic analysis calculating
It is exported with the signal of LED signal lamp.
LED signal lamp is green light, reminds driver that can carry out the switching of pre-selection formula handle valve 2, and LED signal lamp is red
Lamp reminds driver not carry out the switching of pre-selection formula handle valve 2.
After gearbox powers on, driver checks the state of pre-selection formula handle valve 2, adjusts handle valve low gear position, this
When, speed 0km/h, neutral switch is in neutral position, and height gear switch is in low gear position；Control unit 5 acquires speed and passes
Sensor 6, neutral position sensor 7, the signal of high and low shift sensor 9, control unit 5 by logic calculation control electrically-controlled valve 4 opening and closing and
LED signal lamp output.
If LED signal lamp is red, whether driver needs to check pre-selection formula handle valve 2 in low gear position, and neutral gear is opened
It closes and whether is in neutral position, whether height gear switch is in low gear position.
Compressed air source unit 1 supplies gas to pre-selection formula handle valve 2, at this point, pre-selection formula handle valve 2 is in Low gear state, gas source
Pneumatic valve 3 is exported and be supplied to from P mouthfuls to A mouthfuls, switches 3 state of Pneumatic valve, so that the P mouth of Pneumatic valve 3 be made to be connected to A mouthfuls.
Compressed air source unit 1 supplies gas to the P mouth of electrically-controlled valve 4 simultaneously, at this point, electrically-controlled valve 4 is in the open state, electrically-controlled valve 4
P mouth be connected to A mouthful provide gas sources to Pneumatic valve 3 P mouth, gas source by P make a slip of the tongue A mouthfuls into cylinder-piston assembly 8 low grade into
Port, pusher cylinder is to low gear position, to realize that rear cabinet is shifted to low grade, and high and low shift sensor 9 feeds back low-grade signal
To control unit 5.
Driver changes one grade after starting, at this point, pre-selection formula handle valve 2 should be lower than 30km/h in low gear position, speed
(limiting speed can set, and be primarily used to distinguish rear cabinet in high-grade or Low gear state), neutral switch is in gear
It sets, height gear switch is in low gear position, and control unit 5 closes electrically-controlled valve 4 by logic calculation and output LED signal lamp is red.
The gearshift procedure of driver can be split as from gear to neutral gear, then from neutral gear to gear.
Driver can be divided into during changing two grades at one grade from one grade to neutral gear, then from neutral gear to two grades.One grade is arrived sky
Shelves: pre-selection formula handle valve 2 is in low gear position, and lower than 30km/h, (limiting speed can set speed, be primarily used to distinguish rear cabinet
In high-grade or Low gear state), neutral switch is in neutral position, and height gear switch is in low gear position, and control unit 5 passes through
Logic calculation closes electrically-controlled valve 4 and output LED signal lamp is red；Neutral gear is to two grades: pre-selection formula handle valve 2 should be in low-grade location
It sets, speed is lower than 30km/h (it is adjustable to limit speed), and neutral switch is in file location, and height gear switch is in low-grade location
It sets, control unit 5 closes electrically-controlled valve 4 by logic calculation and output LED signal lamp is red.
From two grades to third gear, third gear to fourth gear, fourth gear to third gear, third gear is to two grades, two grades to one grade.
At one grade, if driver's maloperation, pre-selection formula handle valve 2 is stirred to high-grade position (for example, one grade is changed five
Shelves), at this point, pre-selection formula handle valve 2 starts transition state, P mouthfuls of closings, the T mouth of Pneumatic valve 3 is connected to B mouthfuls；At this point, neutral gear is opened
It closes in file location, speed is lower than 30km/h, and control unit 5 closes electrically-controlled valve 4 by logic calculation, and therefore, electrically-controlled valve 4 will not
Gas source is provided and is replaced with five grades to the T mouth of Pneumatic valve 3 to realize.
From fourth gear to five grades, it can be divided into from fourth gear to neutral gear, from neutral gear to five grades.
Fourth gear is to neutral gear: in fourth gear, pre-selection formula handle valve 2 should be higher than 30km/h in low gear position, speed and (limit speed
Spend adjustable), neutral switch is in file location, and height gear switch is in low gear position, and control unit 5 is closed by logic calculation
Electrically-controlled valve 4 and output LED signal lamp green are closed, at this point, LED signal lamp is green, driver, which can switch, stirs pre-selection formula handle
Valve 2 arrives high-grade position, and pre-selection formula handle valve 2 starts transition state, and P mouthful are closed, and A mouthfuls do not provide gas source to Pneumatic valve 3, at this time gas
The T mouth of control valve 3 is connected to B mouthfuls.When driver's operation is to neutral gear, speed is higher than 30km/h, and (limiting speed can be adjusted
Section), neutral switch is in neutral position, and height gear switch is in low gear position, and control unit 5 opens electrically-controlled valve by logic calculation
4 is green with output LED signal lamp.Electrically-controlled valve 4 is in the open state, and gas source is made a slip of the tongue A mouthfuls from the P of electrically-controlled valve 4 enters Pneumatic valve 3,
It makes a slip of the tongue B mouthfuls from the T of Pneumatic valve 3 and enters the high-grade air inlet of cylinder-piston assembly 8, thus realize that rear cabinet is shifted to top grade, height
Shelves sensor 9 feeds back high-grade signal to control unit 5.
Neutral gear is to five grades, and pre-selection formula handle valve 2 should be higher than 30km/h in high-grade position, speed, and (limiting speed can adjust
Section), neutral switch is in file location, and height gear switch is in high-grade position, and control unit 5 closes electrically-controlled valve by logic calculation
4, at this point, LED signal lamp is green, and speed is higher than 30km/h, and LED signal lamp is red when speed is lower than 30km/h.
From five grades to six grade, six grades to seven grades, seven grades to eight grades, eight grades to seven grades, seven grades to six grades, six grades to five grades also
So.
At five grades, if driver's maloperation, pre-selection formula handle valve 2 is stirred to low gear position (for example, five grades are changed one
Shelves), at this point, pre-selection formula handle valve 2 is opened, the P mouth of Pneumatic valve 3 is connected to A mouthfuls, at this point, neutral switch is in file location, speed
Degree is higher than 30km/h, and control unit 5 closes electrically-controlled valve 4 by logic calculation, and therefore, electrically-controlled valve 4 will not provide gas source to Pneumatic valve 3
P mouth be replaced with one grade to realize.
When from five grades to fourth gear, it can be divided into from five grades to neutral gear, from neutral gear to fourth gear.
At five grades, control unit 5 acquires signal, and preselecting formula handle valve 2 at this time should be higher than in high-grade position, speed
30km/h (it is adjustable to limit speed), and neutral switch is in file location, and height gear switch is in high-grade position, control unit 5
Electrically-controlled valve 4 is closed by logic calculation and output LED signal lamp is red, is reminded driver not switch pre-selection formula handle valve 2 and is arrived
Low gear position.Only when speed is lower than 30km/h (it is adjustable to limit speed), then output LED signal lamp is green, at this point, driving
The person of sailing can switch pre-selection formula handle valve 2 to low gear position, and gas source exports from P mouthfuls to A mouthfuls and is supplied to Pneumatic valve 3, Pneumatic valve 3
P mouthfuls are connected to A mouthfuls.
From five grades to neutral gear, for speed lower than 30km/h (it is adjustable to limit speed), neutral switch is in neutral position, high
Low grade switch opens electrically-controlled valve 4 by logic calculation in high-grade position, control unit 5, and electrically-controlled valve 4 is in the open state, gas source
It makes a slip of the tongue A mouthfuls from the P of electrically-controlled valve 4 and enters Pneumatic valve 3, make a slip of the tongue the A mouthful low-grade air inlets into cylinder-piston assembly 8 from the P of Pneumatic valve 3
Mouthful, thus realize that rear cabinet is shifted to low grade, meanwhile, height gear switch is moved to low gear position, and high and low shift sensor 9 is fed back
Low-grade switching signal is to control unit 5.
Driver switches neutral gear to fourth gear, realizes five grades of processes for changing fourth gear.Neutral switch is in shelves after the completion of gear shift
Position, height gear switch are in low gear position, and control unit 5 closes electrically-controlled valve 4 by logic calculation, at this point, when speed is lower than
30km/h, LED signal lamp are red, and speed is higher than 30km/h, and LED signal lamp is green.
It should be pointed out that only neutral switch, in the case where neutral gear, electrically-controlled valve 4 is possible in the open state.
It is in neutral position in neutral switch, height gear switch is in high-grade position, and speed is higher than 30km/h and (limits speed
It is adjustable), control unit 5 can close electrically-controlled valve 4 by logic calculation and export LED signal lamp red.Remind driver should not
Switch pre-selection formula handle valve 2, i.e., switch from top grade to low grade, odd-side after protection can be played the role of.
It is in neutral position in neutral switch, height gear switch is in low gear position, and speed is less than or equal to 30km/h and (limits
Speed is adjustable), control unit 5 can close electrically-controlled valve 4 by logic calculation and export LED signal lamp red.Remind driver
It not switch pre-selection formula handle valve 2, i.e., switch from low grade to top grade, can play prevents vehicle flame-out and gearbox damage
Effect.
To sum up, it inputs a signal into and is set as velocity sensor 6, neutral position sensor 7 and 9 three of high and low shift sensor feedback
Different conditions；Specifically, the speed that velocity sensor 6 is fed back is set as code A for the state greater than 30km/h, speed is small
Code a is set as in the state equal to 30km/h；Neutral switch is set as code B in the state in shelves, neutral switch is in
The state of neutral gear is set as code b；Height gear switch is in high-grade state and is set to code C, height gear switch is in low grade
State be set to code c；Signal output is electrically-controlled valve 4, and output order is that electrically-controlled valve 4 is opened and electrically-controlled valve 4 is closed, signal output
For LED signal lamp, output order is that LED signal lamp is green light and LED signal lamp is red light.
So, when code is ABC, i.e., speed is greater than 30km/h, neutral switch in shelves, height gear switch in top grade
When, electrically-controlled valve 4 is closed and LED signal lamp is red light；
When code is aBC, i.e., speed is less than or equal to 30km/h, neutral switch when shelves, height gear switch are in high-grade, electricity
It controls the closing of valve 4 and LED signal lamp is green light；
When code is AbC, i.e., speed is greater than 30km/h, neutral switch is in neutral gear, height gear switch is in high-grade, electricity
It controls the closing of valve 4 and LED signal lamp is red light；
When code is ABc, i.e., speed is greater than 30km/h, neutral switch when shelves, height gear switch are in low-grade, electrically-controlled valve
4 closings and LED signal lamp are green light；
When code is aBc, i.e., speed is less than or equal to 30km/h, neutral switch when shelves, height gear switch are in low-grade, electricity
It controls the closing of valve 4 and LED signal lamp is red light；
When code is Abc, i.e., speed is greater than 30km/h, neutral switch is in neutral gear, height gear switch is in low-grade, electricity
It controls the opening of valve 4 and LED signal lamp is green light；
When code is abC, i.e., speed is less than or equal to 30km/h, neutral switch is in neutral gear, height gear switch is in top grade
When, electrically-controlled valve 4 is opened and LED signal lamp is green light；
When code is abc, i.e., speed is less than or equal to 30km/h, neutral switch is in neutral gear, height gear switch is in low grade
When, electrically-controlled valve 4 is closed and LED signal lamp is red light.
A kind of heavy load truck provided by the present invention, including the manipulation of gearbox gear-shift described in above-mentioned specific embodiment system
System；The other parts of heavy load truck are referred to the prior art, not reinflated herein.
It should be noted that in the present specification, such as first and second etc relational terms are used merely to one
Entity is distinguished with other several entities, and without necessarily requiring or implying between these entities, there are any this actual
Relationship or sequence.
Heavy load truck provided by the present invention and its gearbox gear-shift steerable system are described in detail above.Herein
In apply that a specific example illustrates the principle and implementation of the invention, the explanation of above example is only intended to sides
Assistant solves method and its core concept of the invention.It should be pointed out that for those skilled in the art, not
, can be with several improvements and modifications are made to the present invention under the premise of being detached from the principle of the invention, these improvement and modification are also fallen into
In the protection scope of the claims in the present invention.
Claims (8)
1. a kind of gearbox gear-shift steerable system, including to supply gas compressed air source unit (1) and with the compressed air source unit
(1) it is connected, the Pneumatic valve (3) to realize gear switch, which is characterized in that further include being set to the compressed air source unit (1) and institute
It states the shift signal between Pneumatic valve (3), for acquiring driver and judges the Pneumatic valve when collecting shift signal
(3) whether should execute the control unit (5) of gear-change operation and be connect with the control unit (5), work as the control unit to receive
(5) feedback section (10) of the standby signal issued after judging, the feedback section (10) is to prompt driver according to standby signal
It can carry out gear switching operation.
2. gearbox gear-shift steerable system according to claim 1, which is characterized in that further include and the control unit (5)
Connection, the electrically-controlled valve (4) that the Pneumatic valve (3) are controlled for controlling the gas on-off of the compressed air source unit (1).
3. gearbox gear-shift steerable system according to claim 2, which is characterized in that the electrically-controlled valve (4) is specially two
Position three-way valve, the two position three-way valve have disconnected first working condition of air inlet and air inlet when energized when power is off
The second working condition that mouth is connected to gas outlet.
4. gearbox gear-shift steerable system according to claim 3, which is characterized in that the feedback section (10) is specially
LED signal lamp.
5. gearbox gear-shift steerable system according to any one of claims 1 to 4, which is characterized in that further include with it is described
Control unit (5) is connected, the velocity sensor (6) to detect vehicle speed and feedback signal to the control unit (5).
6. gearbox gear-shift steerable system according to any one of claims 1 to 4, which is characterized in that further include to control
Gear processed is in the neutral switch of neutral gear or non-neutral state and is connected with the control unit (5), to detect the sky
Gear switch and feedback signal to the control unit (5) neutral position sensor (7).
7. gearbox gear-shift steerable system according to any one of claims 1 to 4, which is characterized in that further include to control
Gear processed is in high-grade or Low gear state height gear switch and is connected with the control unit (5), to detect the height
Low grade switch and feedback signal to the control unit (5) high and low shift sensor (9).
8. a kind of heavy load truck, which is characterized in that manipulate system including gearbox gear-shift as described in any one of claim 1 to 7
System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811160507.8A CN108980334A (en) | 2018-09-30 | 2018-09-30 | A kind of heavy load truck and its gearbox gear-shift steerable system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811160507.8A CN108980334A (en) | 2018-09-30 | 2018-09-30 | A kind of heavy load truck and its gearbox gear-shift steerable system |
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| Publication Number | Publication Date |
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| CN108980334A true CN108980334A (en) | 2018-12-11 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811160507.8A Pending CN108980334A (en) | 2018-09-30 | 2018-09-30 | A kind of heavy load truck and its gearbox gear-shift steerable system |
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