CN206015753U - A kind of bull-dozer walking steerable system - Google Patents
A kind of bull-dozer walking steerable system Download PDFInfo
- Publication number
- CN206015753U CN206015753U CN201620250123.5U CN201620250123U CN206015753U CN 206015753 U CN206015753 U CN 206015753U CN 201620250123 U CN201620250123 U CN 201620250123U CN 206015753 U CN206015753 U CN 206015753U
- Authority
- CN
- China
- Prior art keywords
- valve
- speed
- shift valve
- oil pocket
- suction chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Transmission Device (AREA)
Abstract
The utility model is related to bull-dozer walking steerable system technical field, specifically a kind of bull-dozer walking steerable system, including control crank, support, flexible axle, speed gear shift connecting rod, direction gear shift connecting rod, intermediate connecting rod, gear detent mechanism and speed change commutation pile-up valve, control crank is connected by flexible axle and direction gearshift connecting rod, and gearshift connecting rod in direction is connected to realize linking by intermediate connecting rod and speed gearshift connecting rod.The utility model additionally provides a kind of speed change commutation pile-up valve, including pressure regulator valve, drop valve, speed shift valve and direction shift valve soon.Speed gearshift connecting rod is connected with speed shift valve, and direction gearshift connecting rod is connected with direction shift valve.Relative to prior art, the beneficial effects of the utility model are：Achieve direction gearshift connecting rod and speed to shift gears the linkage function of connecting rod, direction gearshift can be completed by a control crank and speed is shifted gears two kinds of functions, it is to avoid operator need to frequently change control crank and manipulate direction, improve handling comfort.
Description
Technical field
The utility model is related to bull-dozer walking steerable system technical field, and specifically a kind of bull-dozer walking manipulates system
System.
Background technology
Bull-dozer walking steerable system is divided into many stick control forms and mono-lever control form at present.Wherein many handle behaviour
Vertical form realizes respectively that using multiple handles forward-reverse and the left and right turn function of bull-dozer, operator are needed in operation
Frequently switch between each handle, increased the labour intensity of operator.
Patent（ZL200720100184.4）Disclose a kind of monolever mechanical linkage operating mechanism, the mechanism achieve by
Handling maneuver handle and speed-changing operating handle are concentrated on a handle, and operator is after operation bull-dozer carries out speed change, advances
Move back, steering operation when need not change handle, compare the operation of many handle operation formats simpler.Its functional realiey scheme is single
Handle fore-and-aft direction promotes the forward-reverse of control bull-dozer；Left and right directions promotes the left and right turn of control bull-dozer；Rotation hand
Handle carries out the switching of bull-dozer speed stage.The shortcoming that the program is present is carried out when speed stage switches due to rotation for rotary handle
Turn the arm of force less, cause steering force larger, speed stage switching is difficult；Simultaneously because direction gearshift is for promoting in front and back, speed is changed
Keep off as rotary motion, there is the switching of direction of operating, increased the labour intensity of operator, be unfavorable for long-term operation.In addition become
On fast valve, speed gearshift connecting rod and direction gearshift connecting rod are controlled by flexible axle respectively, increased the complexity of operating mechanism,
Debugging is difficult and fault rate is higher.
Utility model content
The purpose of the present invention is i.e. in order to overcome the upper of many stick control mechanisms at present and monolever mechanical linkage operating mechanism
State shortcoming, there is provided the high walking steerable system of a kind of simple to operate, dependable performance, comfortableness.
Technical problem to be solved in the utility model employs the following technical solutions to realize：A kind of bull-dozer walking is manipulated
System, including control crank, support, flexible axle, speed gear shift connecting rod, direction gear shift connecting rod, intermediate connecting rod gear detent mechanism and
Speed change commutation pile-up valve；The control crank is rotatably rack-mount, and control crank is connected with direction gear shift by flexible axle
Bar connects, and the speed gear shift connecting rod is fixedly connected with A axles, and the direction gear shift connecting rod is fixedly connected with B axle, the A axles and B
Axle can be rotating around its axis rotation；Intermediate connecting rod respectively with speed gear shift connecting rod and direction gear shift rod hinge connection, direction gearshift connect
Bar is rotated clockwise around A axles axle center or is rotated counterclockwise and speed gearshift connecting rod can be driven inverse around B axle axle center by intermediate connecting rod
Hour hands are rotated；The speed change commutation pile-up valve includes valve body, is provided with speed shift valve and direction shift valve, the speed in valve body
Degree shift valve is side valve type multidigit hand-operated direction valve, lets out including speed gearshift valve element, speed shift valve oil suction chamber, speed shift valve
Oil pocket and at least two to speed threshold clutch oil pocket；The direction shift valve is three hand-operated direction valves, changes including direction
Gear valve element, direction shift valve oil suction chamber, to forward clutch oil pocket and to back clutch oil pocket；When speed change commutation pile-up valve position
When neutral, speed shift valve oil suction chamber with all do not connect to speed threshold clutch oil pocket and all to speed threshold from
Clutch oil pocket is connected with speed shift valve draining chamber, direction shift valve oil suction chamber with to forward clutch oil pocket and to retreat from
Clutch oil pocket is not connected；When speed change commutation pile-up valve be located at corresponding speed gear when, speed shift valve oil suction chamber with corresponding extremely
Speed threshold clutch oil pocket is connected and is not connected to speed threshold clutch oil pocket with other, and other are to speed threshold clutch
Oil pocket is connected with speed shift valve draining chamber, direction shift valve oil suction chamber with to forward clutch oil pocket or to back clutch oil
Chamber connects, and direction shift valve oil suction chamber is connected with speed shift valve oil suction chamber.
The technical solution of the utility model also has：The gear detent mechanism includes locating piece, positioning locking plate and extension spring, institute
State locating piece to be connected with speed gear shift connecting rod coaxial rigid, locating piece is provided with multiple locating grooves, and it is fixed that positioning locking plate is provided with
Position pin, positioning locking plate are fixedly connected with C axles, and C axles can be around its axis rotation, and alignment pin snaps in locating groove in the presence of extension spring
In.Using the technical program, the screens that can achieve gear prevents off-gear simultaneously.
The technical solution of the utility model also has：The control crank is connected with flexible axle by rocker arm body, the rocking arm
Mechanism includes the first rocking arm, D axles, the second rocking arm and connecting rod, and the D axles are rotatably rack-mount, first rocking arm
The two ends of D axles are separately fixed at the second rocking arm, and the connecting rod is hinged with control crank and the first rocking arm respectively.
The utility model also provides a kind of speed change commutation pile-up valve, including valve body, be provided with valve body speed shift valve and
Direction shift valve, the speed shift valve are side valve type multidigit hand-operated direction valve, enter including speed gearshift valve element, speed shift valve
Oil pocket, speed shift valve draining chamber and at least two to speed threshold clutch oil pocket；The direction shift valve is manual for three
Reversal valve, including direction gearshift valve element, direction shift valve oil suction chamber, to forward clutch oil pocket and to back clutch oil pocket；
When speed change commutation pile-up valve is located at neutral, speed shift valve oil suction chamber is with all to speed threshold clutch oil pocket
Do not connect and all connect with speed shift valve draining chamber to speed threshold clutch oil pocket, direction shift valve oil suction chamber with
To forward clutch oil pocket with do not connect to back clutch oil pocket；
When speed change commutation pile-up valve be located at corresponding speed gear when, speed shift valve oil suction chamber with corresponding to speed threshold from
Clutch oil pocket is connected and is not connected to speed threshold clutch oil pocket with other, and other are to speed threshold clutch oil pocket and speed
Shift valve draining chamber connects, and shift valve oil suction chamber in direction is connected with to forward clutch oil pocket or to back clutch oil pocket, just
Connect to shift valve oil suction chamber with speed shift valve oil suction chamber.
The technical solution of the utility model also has：The speed shift valve is provided with three to speed threshold clutch oil pocket,
Respectively to a gear clutch oil pocket, to two gear clutch oil pockets and to three gear clutch oil pockets, speed shift valve also includes the
One speed shift valve oil pocket and second speed shift valve oil pocket, the direction shift valve oil suction chamber and First Speed gearshift valve oil
Chamber, the connection of second speed shift valve oil pocket；
When speed change commutation pile-up valve be located at neutral when, speed shift valve oil suction chamber with to one gear clutch oil pocket, to two gear
Clutch oil pocket, do not connect to three gear clutch oil pockets, First Speed shift valve oil pocket, second speed shift valve oil pocket, extremely
One gear clutch oil pocket, to two gear clutch oil pockets, to three gear clutch oil pockets connect with speed shift valve draining chamber, direction
Shift valve oil suction chamber with do not connect to forward clutch oil pocket, to back clutch oil pocket；
When speed change commutation pile-up valve is located at forward gear, speed shift valve oil suction chamber with to a gear clutch oil pocket, the
One speed shift valve oil pocket is connected, speed shift valve oil suction chamber with to two gear clutch oil pockets, to three gear clutch oil pockets not
Connection, to two gear clutch oil pockets, to three gear clutch oil pockets connect with speed shift valve draining chamber, direction shift valve oil suction chamber
With connect to forward clutch oil pocket, direction shift valve oil suction chamber with do not connect to back clutch oil pocket；
When speed change commutation pile-up valve is located at advances two gears, speed shift valve oil suction chamber is connected with First Speed shift valve oil pocket
Logical, speed shift valve oil suction chamber with do not connect to a gear clutch oil pocket, to three gear clutch oil pockets, keep off clutch oil to one
Chamber, to three gear clutch oil pockets connect with speed shift valve draining chamber, second speed shift valve oil pocket and to two keep off clutch oils
Chamber connects, direction shift valve oil suction chamber with connect to forward clutch oil pocket, direction shift valve oil suction chamber and to back clutch
Oil pocket is not connected；
When speed change commutation pile-up valve is located at ahead three to be kept off, speed shift valve oil suction chamber and First Speed shift valve oil pocket,
To three gear clutch oil pockets connections, speed shift valve oil suction chamber with to a gear clutch oil pocket, to two gear clutch oil pockets not
Connection, connects to a gear clutch oil pocket, to two clutch oil pockets with speed shift valve draining chamber, direction shift valve oil suction chamber and
Connect to forward clutch oil pocket, direction shift valve oil suction chamber with do not connect to back clutch oil pocket；
When speed change commutation pile-up valve is located at and retreats one and keep off, speed shift valve oil suction chamber with to a gear clutch oil pocket, the
One speed shift valve oil pocket is connected, speed shift valve oil suction chamber with to two gear clutch oil pockets, to three gear clutch oil pockets not
Connection, to two gear clutch oil pockets, to three gear clutch oil pockets connect with speed shift valve draining chamber, direction shift valve oil suction chamber
With connect to back clutch oil pocket, direction shift valve oil suction chamber with do not connect to forward clutch oil pocket；
When speed change commutation pile-up valve is located at retreats two gears, speed shift valve oil suction chamber is connected with First Speed shift valve oil pocket
Logical, speed shift valve oil suction chamber with do not connect to a gear clutch oil pocket, to three gear clutch oil pockets, keep off clutch oil to one
Chamber, to three gear clutch oil pockets connect with speed shift valve draining chamber, second speed shift valve oil pocket and to two keep off clutch oils
Chamber connects, direction shift valve oil suction chamber with connect to forward clutch oil pocket, direction shift valve oil suction chamber and to back clutch
Oil pocket is not connected；
When speed change commutation pile-up valve is located at and retreats three and keep off, speed shift valve oil suction chamber and First Speed shift valve oil pocket,
To three gear clutch oil pockets connections, speed shift valve oil suction chamber with to a gear clutch oil pocket, to two gear clutch oil pockets not
Connection, connects to a gear clutch oil pocket, to two clutch oil pockets with speed shift valve draining chamber, direction shift valve oil suction chamber and
Connect to back clutch oil pocket, direction shift valve oil suction chamber with do not connect to forward clutch oil pocket.
The technical solution of the utility model also has：Also include pressure regulator valve and fast drop valve, the pressure regulator valve include adjusting pressuring valve core,
First spring, second spring, pressure regulation valve pocket, the 3rd spring, pressure regulator valve oil suction chamber, pressure regulator valve draining chamber, adjusting pressuring valve core end oil
Chamber and pressure regulation valve pocket end oil pocket, are provided with middle oil pocket, first spring and between the adjusting pressuring valve core and pressure regulation valve pocket
Two spring effects are set on the adjusting pressuring valve core in the upper end of pressure regulation valve pocket in the upper end of adjusting pressuring valve core, the 3rd spring effect
There are adjusting pressuring valve core internal galleries and damping hole a, adjusting pressuring valve core internal galleries and damping that the middle oil pocket is connected by head and the tail
Hole a is connected with adjusting pressuring valve core end oil pocket, and pressure regulator valve puts and is communicated with hole, and adjusting pressuring valve core can make tune with the slip of pressure regulation valve pocket
Pressure valve oil suction chamber is connected by intercommunicating pore with pressure regulator valve draining chamber or is closed；The fast drop valve includes entering valve element and fast drop valve soon
Oil pocket, the fast drop valve element are provided with switch portion, and the active area of the switch portion upper end is more than the acting surface of switch portion lower end
Product, is communicated with the damping hole b for dropping valve oil suction chamber and speed shift valve oil suction chamber soon in switch portion, the slip of fast drop valve element can make
Switch portion opens or closes the passage between fast drop valve oil suction chamber and speed shift valve oil suction chamber, and fast drop valve element is provided with fast drop valve
Core inner oil duct and damping hole c, speed shift valve oil suction chamber by the fast drop valve core inside oil duct that connects of head and the tail and damping hole c with
The oil pocket connection of pressure regulation valve pocket end, the fast drop valve oil suction chamber are connected with pressure regulator valve oil suction chamber.By pressure regulator valve and drop valve soon
Coordinate, the pressure that can achieve clutch slowly rises, reduce shift shock.
Speed gear shift connecting rod is connected with speed gearshift valve element, and gear shift connecting rod in direction is connected with direction gear shift valve element.
Operation principle of the present utility model：Control crank is pulled forward, makes direction connecting rod be shifted gears around B axle axle center by flexible axle
Turn clockwise, gearshift connecting rod in direction drives speed to shift gears connecting rod around A axles axle center rotate counterclockwise, alignment pin by intermediate connecting rod
Snap in the presence of extension spring in locating groove, the screens of gear is realized while preventing off-gear.Direction gearshift connecting rod and speed are changed
While gear connecting rod rotates, difference pushing direction gearshift valve element and speed gearshift valve element movement, speed change commutation pile-up valve is switched to
Forward gear, when continuing to promote control crank forward, speed change commutation pile-up valve switches to two gears of advance, and other gears are in the same manner.
When speed change commutation pile-up valve is located at neutral, the pressure oil from speed-variable pump enters pressure regulator valve oil suction chamber, Ran Houjin
Enter fast drop valve oil suction chamber, fast drop valve element is moved in the presence of the pressure reduction of damping hole b two ends upwards, switch portion is opened or closed soon
Passage between drop valve oil suction chamber and speed shift valve oil suction chamber, pressure oil admission velocity shift valve oil suction chamber.Due to this time-varying
Quick change is located at neutral to pile-up valve, and pressure oil cannot be introduced into speed threshold clutch oil pocket, and therefore pressure begins to ramp up, and works as switch
Portion two ends pressure phase is simultaneously as therefore the active area of switch portion upper end drops valve soon more than the active area of switch portion lower end
Core is moved down, and is made switch portion progressively close off the passage between fast drop valve oil suction chamber and speed shift valve oil suction chamber, is gradually risen
Pressure oil enter pressure regulation valve pocket end oil pocket through fast drop valve internal galleries and damping hole c, promote pressure regulation valve pocket to overcome the 3rd bullet
The active force of spring is moved upwards.When pressure sets pressure more than pressure regulator valve, pressure oil is through adjusting pressuring valve core internal galleries and damping
Hole a enters adjusting pressuring valve core end oil pocket, overcomes the active force of the first spring and second spring, promotes adjusting pressuring valve core to move up,
Pressure regulator valve oil suction chamber is made to connect by intercommunicating pore with pressure regulator valve draining chamber, now pressure drop, pressure regulator valve oil-feed cavity pressure keeps
Pressure is set for pressure regulator valve.
When speed change commutation pile-up valve is located at forward gear, pressure oil enters to a gear clutch by speed shift valve oil suction chamber
Device oil pocket and First Speed shift valve oil pocket, by First Speed shift valve oil pocket approach axis shift valve oil suction chamber, are changed by direction
Gear valve oil suction chamber enters to forward clutch oil pocket, after keeping off clutch oil pocket and being full of oil to forward clutch oil pocket to one,
Pressure rises to pressure regulator valve and sets pressure.Other shift processes are in the same manner.
Relative to prior art, the beneficial effects of the utility model are：Steerable system is walked by bull-dozer and becomes quick change
To pile-up valve, it is achieved that direction gearshift connecting rod and the linkage function of speed gearshift connecting rod, can be completed by a control crank
Direction gearshift and speed are shifted gears two kinds of functions, it is to avoid operator need to frequently change control crank and manipulate direction, improve behaviour
Vertical comfortableness.
Description of the drawings
Fig. 1 is the structural representation of bull-dozer walking steerable system.
Fig. 2 is the structural representation in the first section of speed change commutation pile-up valve（Neutral）.
Fig. 3 is the structural representation in the second section of speed change commutation pile-up valve（Neutral）.
In figure：1st, control crank, 2, support, 3, flexible axle, 4, speed gearshift connecting rod, 5, direction gearshift connecting rod, 6, centre connects
Bar, 7, A axles, 8, B axle, 9, locating piece, 10, positioning locking plate, 11, extension spring, 12, locating groove, 13, alignment pin, 14, C axles, 15,
First rocking arm, 16, D axles, the 17, second rocking arm, 18, connecting rod, 19, valve body, 20, speed gearshift valve element, 21, speed shift valve oil-feed
Chamber, 22, speed shift valve draining chamber, 23, direction gearshift valve element, 24, direction shift valve oil suction chamber, 25, to forward clutch oil
Chamber, 26, to back clutch oil pocket, 27, to a gear clutch oil pocket, 28, to two gear clutch oil pockets, 29, to three gear clutches
Device oil pocket, 30, First Speed shift valve oil pocket, 31, second speed shift valve oil pocket, 32, adjusting pressuring valve core, the 33, first spring,
34th, second spring, 35, pressure regulation valve pocket, the 36, the 3rd spring, 37, pressure regulator valve oil suction chamber, 38, pressure regulator valve draining chamber, 39, pressure regulator valve
Core end oil pocket, 40, pressure regulation valve pocket end oil pocket, 41, middle oil pocket, 42, adjusting pressuring valve core internal galleries, 43, damping hole a, 44,
Intercommunicating pore, 45, drop valve element soon, 46, fast drop valve oil suction chamber, 47, switch portion, 48, damping hole b, 49, fast drop valve core inside oil duct,
50th, damping hole c.
Specific embodiment
For the technical characterstic of this programme clearly can be described, below according to accompanying drawing the utility model specific embodiment is made into
One step explanation.
The steerable system as shown in figure 1, a kind of bull-dozer is walked, including control crank 1, support 2, rocker arm body, flexible axle 3,
Speed gear shift connecting rod 4, direction gear shift connecting rod 5, intermediate connecting rod 6, gear detent mechanism and speed change commutation pile-up valve.
Rotatably on support 2, control crank 1 is connected with flexible axle 3 control crank 1 by rocker arm body, rocking arm
Mechanism includes that the first rocking arm 15, D axles 16, the second rocking arm 17 and connecting rod 18, D axles 16 are rotatably arranged on support 2, first
Rocking arm 15 and the second rocking arm 17 are separately fixed at the two ends of D axles 16, and connecting rod 18 is cut with scissors with control crank 1 and the first rocking arm 15 respectively
Connect.
Flexible axle 3 is connected with direction gear shift connecting rod 5, and speed gear shift connecting rod 4 is fixedly connected with A axles 7, direction gear shift connecting rod 5 and B
Axle 8 is fixedly connected, and A axles 7 and B axle 8 can be rotating around its axis rotations；Intermediate connecting rod 6 respectively with speed gear shift connecting rod 4 and direction
Gear shift connecting rod 5 is hinged, and direction gearshift connecting rod 5 is rotated clockwise around 7 axle center of A axles or rotated counterclockwise and can pass through intermediate connecting rod 6
Speed gearshift connecting rod 4 is driven to rotate counterclockwise around 8 axle center of B axle.
Gear detent mechanism includes locating piece 9, positioning locking plate 10 and extension spring 11, and locating piece 9 is coaxial with speed gear shift connecting rod 4
It is rigidly connected, locating piece 9 is provided with multiple locating grooves 12, positioning locking plate 10 is provided with alignment pin 13, positioning locking plate 10 and C axles
14 are fixedly connected, and C axles 14 can be snapped in locating groove 12 in the presence of extension spring 11 around its axis rotation, alignment pin 13.
As shown in Fig. 2 speed change commutation pile-up valve includes valve body 19, pressure regulator valve is provided with valve body 19, drop valve, speed are changed soon
Gear valve and direction shift valve.
Pressure regulator valve includes adjusting pressuring valve core 32, the first spring 33, second spring 34, pressure regulation valve pocket 35, the 3rd spring 36, pressure regulation
Valve oil suction chamber 37, pressure regulator valve draining chamber 38, adjusting pressuring valve core end oil pocket 39 and pressure regulation valve pocket end oil pocket 40, adjusting pressuring valve core 32 with
It is provided with middle oil pocket 41 between pressure regulation valve pocket 35, the first spring 33 and second spring 34 act on the upper end of adjusting pressuring valve core 32,
Three springs 36 act on the upper end of pressure regulation valve pocket 35, and adjusting pressuring valve core 32 is provided with adjusting pressuring valve core internal galleries 42 and damping hole a43,
The adjusting pressuring valve core internal galleries 42 and damping hole a43 that middle oil pocket 41 is connected by head and the tail are connected with adjusting pressuring valve core end oil pocket 39
Logical, be communicated with hole 44 on pressure regulation valve pocket 35, the slip of adjusting pressuring valve core 32 and pressure regulation valve pocket 35 can make pressure regulator valve oil suction chamber 37 with
Pressure regulator valve draining chamber 38 is connected or is closed by intercommunicating pore 44；Drop valve includes dropping valve oil suction chamber 46 soon by valve element 45 and soon soon, soon
Drop valve element 45 is provided with switch portion 47, and the active area of 47 upper end of switch portion is more than the active area of 47 lower end of switch portion.
Speed shift valve is four hand-operated direction valves of side valve type, including speed gearshift valve element 20, speed shift valve oil suction chamber
21st, the gear of speed shift valve draining chamber 22 to clutch oil pocket 27, to two gear clutch oil pockets 28, to three gear clutch oil pockets
29th, First Speed shift valve oil pocket 30 and second speed shift valve oil pocket 31.
The damping hole b48 for dropping valve oil suction chamber 46 and speed shift valve oil suction chamber 21 soon is communicated with switch portion 47, fast drop
It is logical between fast drop valve oil suction chamber 46 and speed shift valve oil suction chamber 21 that the slip of valve element 45 opens or closes can switch portion 47
Road, fast drop valve element 45 are provided with fast drop valve core inside oil duct 49 and damping hole c50, and speed shift valve oil suction chamber 21 is connected by head and the tail
The fast drop valve core inside oil duct 49 for connecing is connected with pressure regulation valve pocket end oil pocket 40 with damping hole c50, and the fast valve oil suction chamber 46 that drops is with tune
Pressure valve oil suction chamber 37 is connected.
Direction shift valve is three hand-operated direction valves, including direction shift gears valve element 23, direction shift valve oil suction chamber 24, to front
Enter clutch oil pocket 25 and to back clutch oil pocket 26, direction shift valve oil suction chamber 24 and First Speed shift valve oil pocket 30,
Second speed shift valve oil pocket 31 is connected.
When speed change commutation pile-up valve is located at neutral, speed shift valve oil suction chamber 21 with to a gear clutch oil pocket 27, extremely
Two gear clutch oil pockets 28, to three gear clutch oil pockets 29, First Speed shift valve oil pocket 30, second speed shift valve oil pocket 31
Do not connect, shift gears with speed to a gear clutch oil pocket 27, to two gear clutch oil pockets 28, to three gear clutch oil pockets 29
Valve draining chamber 22 connects, direction shift valve oil suction chamber 24 with to forward clutch oil pocket 25, to back clutch oil pocket 26 not
Connection.
When speed change commutation pile-up valve is located at forward gear, speed shift valve oil suction chamber 21 with to a gear clutch oil pocket
27th, First Speed shift valve oil pocket 30 is connected, speed shift valve oil suction chamber 21 with to two gear clutch oil pockets 28, to three gear clutches
Device oil pocket 29 is not connected, and is connected to two gear clutch oil pockets 28, to three gear clutch oil pockets 29 with speed shift valve draining chamber 22
Logical, direction shift valve oil suction chamber 24 connect 25 with to forward clutch oil pocket, direction shift valve oil suction chamber 24 and extremely retrogressing clutch
Device oil pocket 26 is not connected.
When speed change commutation pile-up valve be located at advance two keep off when, speed shift valve oil suction chamber 21 and First Speed shift valve oil pocket
30 connections, speed shift valve oil suction chamber 21 with to a gear clutch oil pocket 27, keep off clutch oil pockets 29 to three and do not connect, to one
Gear clutch oil pocket 27, connect with speed shift valve draining chamber 22 to three gear clutch oil pockets 29, second speed shift valve oil pocket
31 with connect to two gear clutch oil pockets 28, direction shift valve oil suction chamber 24 with connect to forward clutch oil pocket 25, direction is changed
Keep off valve oil suction chamber 24 and do not connect to back clutch oil pocket 26.
When speed change commutation pile-up valve is located at ahead three to be kept off, speed shift valve oil suction chamber 21 and First Speed shift valve oil pocket
30th, connect to three gear clutch oil pockets 29, speed shift valve oil suction chamber 21 with to a gear clutch oil pocket 27, to two gear clutches
Oil pocket 28 is not connected, and is connected to a gear clutch oil pocket 27, to two clutch oil pockets 28 with speed shift valve draining chamber 22, just
To shift valve oil suction chamber 24 with connect to forward clutch oil pocket 25, direction shift valve oil suction chamber 24 with to back clutch oil pocket
26 do not connect.
When speed change commutation pile-up valve is located at and retreats one and keep off, speed shift valve oil suction chamber 21 with to a gear clutch oil pocket
27th, First Speed shift valve oil pocket 30 is connected, speed shift valve oil suction chamber 21 with to two gear clutch oil pockets 28, to three gear clutches
Device oil pocket 29 is not connected, and is connected to two gear clutch oil pockets 28, to three gear clutch oil pockets 29 with speed shift valve draining chamber 22
Logical, direction shift valve oil suction chamber 24 with connect to back clutch oil pocket 26, direction shift valve oil suction chamber 24 and to advance clutch
Device oil pocket 25 is not connected.
When speed change commutation pile-up valve is located at and retreats two and keep off, speed shift valve oil suction chamber 21 and First Speed shift valve oil pocket
30 connections, speed shift valve oil suction chamber 21 with to a gear clutch oil pocket 27, keep off clutch oil pockets 29 to three and do not connect, to one
Gear clutch oil pocket 27, connect with speed shift valve draining chamber 22 to three gear clutch oil pockets 29, second speed shift valve oil pocket
31 with connect to two gear clutch oil pockets 28, direction shift valve oil suction chamber 24 with connect to forward clutch oil pocket 26, direction is changed
Keep off valve oil suction chamber 24 and do not connect to back clutch oil pocket 25.
When speed change commutation pile-up valve is located at and retreats three and keep off, speed shift valve oil suction chamber 21 and First Speed shift valve oil pocket
30th, connect to three gear clutch oil pockets 29, speed shift valve oil suction chamber 21 with to a gear clutch oil pocket 27, to two gear clutches
Oil pocket 28 is not connected, and is connected to a gear clutch oil pocket 27, to two clutch oil pockets 28 with speed shift valve draining chamber 22, just
To shift valve oil suction chamber 24 with connect to back clutch oil pocket 26, direction shift valve oil suction chamber 24 with to forward clutch oil pocket
25 do not connect.
Speed gear shift connecting rod 4 is connected with speed gearshift valve element 20, and direction gear shift connecting rod 5 is connected with direction gear shift valve element 23.
Operation principle of the present utility model：Control crank 1 is pulled forward, makes direction connecting rod 5 be shifted gears around B axle 8 by flexible axle 3
Axle center turns clockwise, and gearshift connecting rod 5 in direction drives speed gearshift connecting rod 4 to be revolved around 7 axle center of A axles counterclockwise by intermediate connecting rod 6
Turn, alignment pin 13 is snapped in locating groove 12 in the presence of extension spring 11, realizes the screens of gear while preventing off-gear.Change in direction
Pushing direction gearshift valve element 5 distinguished by gear connecting rod 5 and speed gearshift connecting rod 4 while rotation and speed gearshift valve element 4 is moved, and will become
Quick change switches to forward gear to pile-up valve, and when continuing to promote control crank 1 forward, speed change commutation pile-up valve switches to advance
Two gears, other gears are in the same manner.
When speed change commutation pile-up valve is located at neutral, the pressure oil from speed-variable pump enters pressure regulator valve oil suction chamber 37, then
Fast drop valve oil suction chamber 46 is entered, fast drop valve element 45 is moved in the presence of the pressure reduction of damping hole b48 two ends upwards, makes switch portion 47 dozens
Open or close the passage closed between fast drop valve oil suction chamber 46 and speed shift valve oil suction chamber 21, pressure oil admission velocity shift valve oil-feed
Chamber 21.As now speed change commutation pile-up valve is located at neutral, pressure oil cannot be introduced into speed threshold clutch oil pocket, therefore pressure
Begin to ramp up, when 47 two ends pressure phase of switch portion simultaneously as the active area of 47 upper end of switch portion is more than 47 lower end of switch portion
Active area, therefore drop valve element 45 is moved down soon, is made switch portion 47 progressively close off fast drop valve oil suction chamber 46 and is shifted gears with speed
Passage between valve oil suction chamber 21, the pressure oil for gradually rising enter pressure regulator valve through fast drop valve internal galleries 49 and damping hole c50
Set end oil pocket 40, promotes pressure regulation valve pocket 35 to overcome the active force of the 3rd spring 36 to move upwards.When pressure is set more than pressure regulator valve
During constant-pressure, pressure oil enters adjusting pressuring valve core end oil pocket 39 through adjusting pressuring valve core internal galleries 42 and damping hole a43, overcomes first
Spring 33 and the active force of second spring 34, are promoted adjusting pressuring valve core 32 to move up, pressure regulator valve oil suction chamber 37 is let out with pressure regulator valve
Oil pocket 38 is connected by intercommunicating pore 44, now pressure drop, and 37 pressure of pressure regulator valve oil suction chamber remains pressure regulator valve and sets pressure.
When speed change commutation pile-up valve be located at forward gear when, pressure oil by speed shift valve oil suction chamber 21 enter to a gear from
Clutch oil pocket 27 and First Speed shift valve oil pocket 30, by 30 approach axis shift valve oil suction chamber of First Speed shift valve oil pocket
24, forward clutch oil pocket 26 is entered to by direction shift valve oil suction chamber 24, when to a gear clutch oil pocket 27 and to advance from
After clutch oil pocket 26 is full of oil, pressure rises to pressure regulator valve and sets pressure.Other shift processes are in the same manner.
Embodiment of the present utility model is elaborated above in conjunction with accompanying drawing, but the utility model is not limited to
Embodiment is stated, in the ken that those of ordinary skill in the art possess, can be with without departing from the utility model objective
On the premise of make a variety of changes.
Claims (5)
1. a kind of bull-dozer is walked steerable system, it is characterised in that：Including control crank（1）, support（2）, flexible axle（3）, speed
Gear shift connecting rod（4）, direction gear shift connecting rod（5）, intermediate connecting rod（6）, gear detent mechanism and speed change commutation pile-up valve；The manipulation
Handle（1）Support is rotatably arranged on（2）On, control crank（1）By flexible axle（3）With direction gear shift connecting rod（5）Connection, institute
State speed gear shift connecting rod（4）With A axles（7）It is fixedly connected, the direction gear shift connecting rod（5）With B axle（8）It is fixedly connected, the A axles
（7）And B axle（8）Can be rotating around its axis rotation；Intermediate connecting rod（6）Respectively with speed gear shift connecting rod（4）With direction gear shift connecting rod
（5）It is hinged, direction gearshift connecting rod（5）Around A axles（7）Axle center rotates clockwise or rotates counterclockwise and can pass through intermediate connecting rod（6）
Drive speed gearshift connecting rod（4）Around B axle（8）Axle center rotates counterclockwise；The speed change commutation pile-up valve includes valve body（19）, in valve
Body（19）Speed shift valve and direction shift valve are inside provided with, and the speed shift valve is side valve type multidigit hand-operated direction valve, including
Speed gearshift valve element（20）, speed shift valve oil suction chamber（21）, speed shift valve draining chamber（22）Keep off with least two to speed
Position clutch oil pocket；The direction shift valve is three hand-operated direction valves, including direction gearshift valve element（23）, direction shift valve enters
Oil pocket（24）, to forward clutch oil pocket（25）With to back clutch oil pocket（26）；
When speed change commutation pile-up valve is located at neutral, speed shift valve oil suction chamber（21）With all to speed threshold clutch oil pocket
Do not connect and all to speed threshold clutch oil pocket with speed shift valve draining chamber（22）Connection, direction shift valve oil-feed
Chamber（24）With to forward clutch oil pocket（25）With to back clutch oil pocket（26）Do not connect；
When speed change commutation pile-up valve is located at corresponding speed gear, speed shift valve oil suction chamber（21）With corresponding to speed threshold from
Clutch oil pocket is connected and is not connected to speed threshold clutch oil pocket with other, and other are to speed threshold clutch oil pocket and speed
Shift valve draining chamber（22）Connection, direction shift valve oil suction chamber（24）With to forward clutch oil pocket（25）Or to back clutch
Oil pocket（26）Connection, direction shift valve oil suction chamber（24）With speed shift valve oil suction chamber（21）Connection；The speed gear shift connecting rod
（4）With speed gearshift valve element（20）Connection, the direction gear shift connecting rod（5）With direction gear shift valve element（23）Connection.
2. bull-dozer according to claim 1 is walked steerable system, it is characterised in that：The gear detent mechanism includes fixed
Position block（9）, positioning locking plate（10）And extension spring（11）, the locating piece（9）With speed gear shift connecting rod（4）Coaxial rigid connects, fixed
Position block（9）It is provided with multiple locating grooves（12）, position locking plate（10）It is provided with alignment pin（13）, position locking plate（10）With C axles
（14）It is fixedly connected, C axles（14）Can be around its axis rotation, alignment pin（13）In extension spring（11）In the presence of snap in locating groove
（12）In.
3. bull-dozer according to claim 1 and 2 is walked steerable system, it is characterised in that：The control crank（1）Pass through
Rocker arm body and flexible axle（3）Connection, the rocker arm body include the first rocking arm（15）, D axles（16）, the second rocking arm（17）And connecting rod
（18）, the D axles（16）Support is rotatably arranged on（2）On, first rocking arm（15）With the second rocking arm（17）Solid respectively
It is scheduled on D axles（16）Two ends, the connecting rod（18）Respectively with control crank（1）With the first rocking arm（15）It is hinged.
4. bull-dozer according to claim 1 is walked steerable system, it is characterised in that：
The speed shift valve is provided with three to speed threshold clutch oil pocket, respectively to a gear clutch oil pocket（27）, extremely
Two gear clutch oil pockets（28）With to three gear clutch oil pockets（29）, speed shift valve also includes First Speed shift valve oil pocket
（30）With second speed shift valve oil pocket（31）, the direction shift valve oil suction chamber（24）With First Speed shift valve oil pocket
（30）, second speed shift valve oil pocket（31）Connection；
When speed change commutation pile-up valve is located at neutral, speed shift valve oil suction chamber（21）With to one gear clutch oil pocket（27）, extremely
Two gear clutch oil pockets（28）, to three gear clutch oil pockets（29）, First Speed shift valve oil pocket（30）, second speed shift valve
Oil pocket（31）Do not connect, to a gear clutch oil pocket（27）, to two gear clutch oil pockets（28）, to three gear clutch oil pockets
（29）With speed shift valve draining chamber（22）Connection, direction shift valve oil suction chamber（24）With to forward clutch oil pocket（25）、
To back clutch oil pocket（26）Do not connect；
When speed change commutation pile-up valve is located at forward gear, speed shift valve oil suction chamber（21）With to one gear clutch oil pocket
（27）, First Speed shift valve oil pocket（30）Connection, speed shift valve oil suction chamber（21）With to two gear clutch oil pockets（28）, extremely
Three gear clutch oil pockets（29）Do not connect, to two gear clutch oil pockets（28）, to three gear clutch oil pockets（29）Change with speed
Gear valve draining chamber（22）Connection, direction shift valve oil suction chamber（24）With connect to forward clutch oil pocket（25）, direction shift valve
Oil suction chamber（24）With to back clutch oil pocket（26）Do not connect；
When speed change commutation pile-up valve is located at advances two gears, speed shift valve oil suction chamber（21）With First Speed shift valve oil pocket
（30）Connection, speed shift valve oil suction chamber（21）With to one gear clutch oil pocket（27）, to three gear clutch oil pockets（29）Not
Connection, to a gear clutch oil pocket（27）, to three gear clutch oil pockets（29）With speed shift valve draining chamber（22）Connection, second
Speed shift valve oil pocket（31）With to two gear clutch oil pockets（28）Connection, direction shift valve oil suction chamber（24）With to advance clutch
Device oil pocket（25）Connection, direction shift valve oil suction chamber（24）With to back clutch oil pocket（26）Do not connect；
When speed change commutation pile-up valve is located at ahead three to be kept off, speed shift valve oil suction chamber（21）With First Speed shift valve oil pocket
（30）, to three gear clutch oil pockets（29）Connection, speed shift valve oil suction chamber（21）With to one gear clutch oil pocket（27）, to two
Gear clutch oil pocket（28）Do not connect, to a gear clutch oil pocket（27）, to two clutch oil pockets（28）With speed shift valve
Draining chamber（22）Connection, direction shift valve oil suction chamber（24）With to forward clutch oil pocket（25）Connection, direction shift valve oil-feed
Chamber（24）With to back clutch oil pocket（26）Do not connect；
When speed change commutation pile-up valve is located at retreats a gear, speed shift valve oil suction chamber（21）With to one gear clutch oil pocket
（27）, First Speed shift valve oil pocket（30）Connection, speed shift valve oil suction chamber（21）With to two gear clutch oil pockets（28）, extremely
Three gear clutch oil pockets（29）Do not connect, to two gear clutch oil pockets（28）, to three gear clutch oil pockets（29）Change with speed
Gear valve draining chamber（22）Connection, direction shift valve oil suction chamber（24）With to back clutch oil pocket（26）Connection, direction shift valve
Oil suction chamber（24）With to forward clutch oil pocket（25）Do not connect；
When speed change commutation pile-up valve is located at retreats two gears, speed shift valve oil suction chamber（21）With First Speed shift valve oil pocket
（30）Connection, speed shift valve oil suction chamber（21）With to one gear clutch oil pocket（27）, to three gear clutch oil pockets（29）Not
Connection, to a gear clutch oil pocket（27）, to three gear clutch oil pockets（29）With speed shift valve draining chamber（22）Connection, second
Speed shift valve oil pocket（31）With to two gear clutch oil pockets（28）Connection, direction shift valve oil suction chamber（24）With to advance clutch
Device oil pocket（26）Connection, direction shift valve oil suction chamber（24）With to back clutch oil pocket（25）Do not connect；
When speed change commutation pile-up valve is located at retreats three gears, speed shift valve oil suction chamber（21）With First Speed shift valve oil pocket
（30）, to three gear clutch oil pockets（29）Connection, speed shift valve oil suction chamber（21）With to one gear clutch oil pocket（27）, to two
Gear clutch oil pocket（28）Do not connect, to a gear clutch oil pocket（27）, to two clutch oil pockets（28）With speed shift valve
Draining chamber（22）Connection, direction shift valve oil suction chamber（24）With to back clutch oil pocket（26）Connection, direction shift valve oil-feed
Chamber（24）With to forward clutch oil pocket（25）Do not connect.
5. according to claim 1 or 4 bull-dozer walking steerable system, it is characterised in that：Also include pressure regulator valve and fast drop
Valve, the pressure regulator valve include adjusting pressuring valve core（32）, the first spring（33）, second spring（34）, pressure regulation valve pocket（35）, the 3rd spring
（36）, pressure regulator valve oil suction chamber（37）, pressure regulator valve draining chamber（38）, adjusting pressuring valve core end oil pocket（39）With pressure regulation valve pocket end oil pocket
（40）, the adjusting pressuring valve core（32）With pressure regulation valve pocket（35）Between be provided with middle oil pocket（41）, first spring（33）With
Two springs（34）Act on adjusting pressuring valve core（32）Upper end, the 3rd spring（36）Act on pressure regulation valve pocket（35）Upper end,
The adjusting pressuring valve core（32）It is provided with adjusting pressuring valve core internal galleries（42）With damping hole a（43）, the middle oil pocket（41）Pass through
The adjusting pressuring valve core internal galleries of head and the tail connection（42）With damping hole a（43）With adjusting pressuring valve core end oil pocket（39）Connection, pressure regulator valve
Set（35）On be communicated with hole（44）, adjusting pressuring valve core（32）With pressure regulation valve pocket（35）Slip can make pressure regulator valve oil suction chamber（37）With
Pressure regulator valve draining chamber（38）By intercommunicating pore（44）Connection is closed；The fast drop valve includes fast by valve element（45）Enter with fast drop valve
Oil pocket（46）, the fast drop valve element（45）It is provided with switch portion（47）, the switch portion（47）The active area of upper end is more than to be opened
Pass portion（47）The active area of lower end, switch portion（47）On be communicated with dropping valve oil suction chamber soon（46）With speed shift valve oil suction chamber
（21）Damping hole b（48）, valve element drops soon（45）Slip can make switch portion（47）Open or close fast drop valve oil suction chamber（46）
With speed shift valve oil suction chamber（21）Between passage, soon drop valve element（45）It is provided with fast drop valve core inside oil duct（49）And damping
Hole c（50）, speed shift valve oil suction chamber（21）The fast drop valve core inside oil duct connected by head and the tail（49）With damping hole c（50）With
Pressure regulation valve pocket end oil pocket（40）Connection, the fast drop valve oil suction chamber（46）With pressure regulator valve oil suction chamber（37）Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620250123.5U CN206015753U (en) | 2016-03-29 | 2016-03-29 | A kind of bull-dozer walking steerable system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620250123.5U CN206015753U (en) | 2016-03-29 | 2016-03-29 | A kind of bull-dozer walking steerable system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206015753U true CN206015753U (en) | 2017-03-15 |
Family
ID=58241042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620250123.5U Active CN206015753U (en) | 2016-03-29 | 2016-03-29 | A kind of bull-dozer walking steerable system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206015753U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018188449A1 (en) * | 2017-12-01 | 2018-10-18 | 徐工集团工程机械有限公司 | Travel motor shift valve, travel motor and construction machine |
-
2016
- 2016-03-29 CN CN201620250123.5U patent/CN206015753U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018188449A1 (en) * | 2017-12-01 | 2018-10-18 | 徐工集团工程机械有限公司 | Travel motor shift valve, travel motor and construction machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206015753U (en) | A kind of bull-dozer walking steerable system | |
| CN105114573B (en) | Beat is to cone disk type buncher | |
| CN106051152A (en) | Parking and gear-shifting executing mechanism for automatic transmission | |
| CN203836173U (en) | Double-rod manipulating mechanism with gear shifting booster speed changer | |
| CN203413218U (en) | Control handle of multiple directional control valve | |
| CN103158764B (en) | The steering swivel system of hydraulic driven rice transplanter | |
| CN201125400Y (en) | Mechanical type monolever steering, variable speed control mechanism of soil shifter | |
| CN201056711Y (en) | Mono-lever walk operating device of bulldozer | |
| CN207906426U (en) | A kind of gear box of tractor gearshift | |
| CN209654540U (en) | A kind of walking special gear box of agricultural operation machinery | |
| CN106900284B (en) | Transmission case | |
| CN115324963A (en) | Hydraulic power-assisted proportional valve | |
| JP3727553B2 (en) | Work machine operation structure | |
| CN201119308Y (en) | Hydraulic stepless speed change operating device of harvester | |
| CN104136775A (en) | Hydraulic variable pump and displacement control method thereof | |
| CN107046944B (en) | Transmission control system | |
| CN205859131U (en) | A kind of two-way soft axle operating device of variator | |
| CN205260763U (en) | Cam formula derailleur of shifting | |
| CN206981072U (en) | A kind of nozzle of body cleaner swinging structure | |
| CN104875613B (en) | For integrated control device of the power output component to transfer case and related tractor | |
| CN106965854B (en) | Transmission control device | |
| CN202349190U (en) | Screw rod gear selecting and shifting mechanism | |
| CN106481807A (en) | Shifter of transmission, variator and automobile | |
| CN105114575B (en) | Beat is to cone disk type stepless speed change device | |
| CN205559755U (en) | A tractor side operating mechanism that shifts for orchard operation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |