CN106641235B - A kind of AMT hydraulic shifts execution system with pressure limiting positioning function - Google Patents
A kind of AMT hydraulic shifts execution system with pressure limiting positioning function Download PDFInfo
- Publication number
- CN106641235B CN106641235B CN201710045884.6A CN201710045884A CN106641235B CN 106641235 B CN106641235 B CN 106641235B CN 201710045884 A CN201710045884 A CN 201710045884A CN 106641235 B CN106641235 B CN 106641235B
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- pressure limiting
- positioning
- piston bar
- range piston
- valve body
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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
- F16H61/22—Locking of the control input devices
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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
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/3023—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by fluid pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention discloses a kind of, and the AMT hydraulic shifts with pressure limiting positioning function execute system, including valve body, multiple piston holes are provided on valve body, there are one range piston bars for installation in each piston hole, it is provided with the first oil pocket and the second oil pocket between the both ends and valve body of each range piston bar, the positioning end of range piston bar passes through the first oil pocket and is connected with mechanical alignment positioning device, installation site sensor on valve body；It is provided with interlock between range piston bar；Mechanical alignment positioning device includes the end cap being mounted on valve body, and pressure limiting positioning device and mechanical centering device by positioning axis connection are sequentially installed in end cap；The work of each range piston bar is controlled by solenoid-operated proportional pressure reducing valve, the interlocking between the positioning and gear of each gear is realized using pressure limiting positioning device, mechanical interlock, the bit positions of range piston bar are detected by position sensor, it can realize the control of multiple gears and execute work, there is higher control accuracy and shift reliability.
Description
Technical field
The present invention relates to automotive transmission technical fields more particularly to a kind of AMT hydraulic pressure with pressure limiting positioning function to change
Shelves execute system.
Background technology
The gear shifting actuating mechanism of AMT automatic transmission mainly has mechanical and fluid pressure type two types, wherein fluid pressure type to change
Gear, which executes structure, has the characteristics that simple in structure, arrangement is convenient, easy to control, is used widely in automatic transmission field.Mesh
The shift hydraulic actuating mechanism used in preceding AMT automatic transmission is by parts groups such as hydraulic control circuit, hydraulic cylinder, shift reversal meanss
At, and drive range is detected and is controlled using sensing technology, while disclosure satisfy that control accuracy requirement, greatly reduce
Shifting operation complexity.
Invention content
Technical problem to be solved by the invention is to provide a kind of tools with higher control accuracy and functional reliability
There are the AMT hydraulic shifts of pressure limiting positioning function to execute system.
In order to solve the above technical problems, the technical scheme is that：A kind of AMT hydraulic pressure with pressure limiting positioning function changes
Shelves execute system, including valve body, and the piston hole of multiple parallel arrangements is provided on the valve body, is installed in each piston hole
There are one range piston bar, there are one gear shift operation handle, each range piston bars for installation on each range piston bar
Both ends and the valve body between be provided with the first oil pocket and the second oil pocket, first oil pocket and second oil pocket lead to respectively
It crosses a solenoid-operated proportional pressure reducing valve to connect with oil sources, the positioning end of the range piston bar passes through first oil pocket and is connected with
Mechanical alignment positioning device, it is described machinery alignment positioning device and first oil pocket between range piston bar on axis is installed
Sealing device is equipped with the position sensor for detecting the range piston bar bit positions on the valve body；The shift
Interlock is provided between piston rod；
The machinery alignment positioning device includes the end cap being mounted on the valve body, is sequentially installed in the end cap logical
The pressure limiting positioning device and mechanical centering device of positioning axis connection are crossed, the pressure limiting positioning device includes being mounted in the end cap
Positioning bushing, the positioning end end of the range piston bar be equipped with stretches into it is described positioning bushing in the locating shaft, institute
It states and is provided with multiple positioning arc grooves disposed in parallel on the inner wall of positioning bushing, be equipped with and the positioning on the locating shaft
The positioning plunger of arc groove cooperation is equipped with plunger locking pressure limiting regulation device in the locating shaft.
As a kind of perferred technical scheme, the shaft sealer include be sleeved on the range piston bar and with institute
The axle sleeve that valve body is fixedly connected is stated, the inner surface of the axle sleeve is provided with seal groove, sealing ring is equipped in the seal groove.
As a kind of perferred technical scheme, the interlock includes being arranged in the valve body and being connected to adjacent pistons
The interlocking axis hole in hole is equipped with mutual lock shaft in the interlocking axis hole, and the side of the range piston pole face to the mutual lock shaft is equal
It is provided with interlock slot, the interlocking pin hole of connection both sides interlock slot is provided on the intermediate range piston bar, it is described mutual
Interlocking plunger is installed in lockpin hole.
As a kind of perferred technical scheme, the plunger locking pressure limiting regulation device includes being arranged in the locating shaft
Valve-rod cavity, positioning valve rod is installed in the valve-rod cavity, the plunger vertical with the valve-rod cavity is provided on the locating shaft
Hole, the positioning plunger are mounted in the plunger hole, and the wedge with the positioning plunger cooperation is provided on the positioning valve rod
Connected in star, it is described positioning valve rod and the mechanical centering device between the valve-rod cavity in retaining spring is installed, it is described fixed
The other end of position valve rod is connected with the pressure limiting regulation and control oil cylinder being arranged in the range piston bar.
As a kind of perferred technical scheme, the pressure limiting regulation and control oil cylinder includes the limit being arranged in the range piston bar
Pumping cavity is equipped with pressure limiting piston in the pressure limiting oil pocket, pressure limiting spring is equipped between the pressure limiting piston and positioning valve rod,
One end of the pressure limiting spring is resisted against on the pressure limiting piston and the other end is resisted against the end of the locating shaft, the pressure limiting
Oil pocket is connected to by pressure limiting control valve with the oil sources.
As a kind of perferred technical scheme, the pressure limiting control valve includes the two-position three way being connected to the pressure limiting oil pocket
Solenoid directional control valve, the two position, three-way electromagnetic change valve are connected with pressure reducing valve.
As a kind of perferred technical scheme, the mechanical centering device includes the centering pad being sleeved on the locating shaft
The end of plate, the locating shaft is equipped with centering pre-tightening apparatus, be equipped in opposite directions on the locating shaft press up against it is described right
Spring base on middle pre-tightening apparatus and the centering backing plate is set with centering on the locating shaft between two spring bases
Spring.
As a kind of perferred technical scheme, the centering pre-tightening apparatus includes the centering for being mounted on the positioning shaft end
Screw, is sequentially installed with spring washer and gasket between the nut and the locating shaft of the centering screw, the gasket it is outer
Edge is pressed against on the adjacent spring base.
As a kind of perferred technical scheme, the gear shift operation handle includes selector fork or shift reversal means.
As a kind of perferred technical scheme, there are three piston hole, each interior peaces of the piston hole for setting on the valve body
For dress there are one range piston bar, the range piston bar includes the first range piston bar, the second range piston bar and third shift
Piston rod；
The left end of the first range piston bar is connected with the mechanical alignment positioning device and right end is out of described valve body
The gear shift operation handle is stretched out and is equipped with, between the valve body and the first range piston bar on the outside of second oil pocket
Sealing ring is installed；
The right end of the third range piston bar is connected with the mechanical alignment positioning device and left end is out of described valve body
The gear shift operation handle is stretched out and is equipped with, between the valve body and the third range piston bar on the outside of second oil pocket
Sealing ring is installed；
The left end of the second range piston bar is connected with the mechanical alignment positioning device and right end ends in described the
In the piston hole on the inside of two oil pockets, the gear shift operation handle is installed on the middle part of the second range piston bar.
By adopting the above-described technical solution, a kind of AMT hydraulic shifts with pressure limiting positioning function execute system, including
Valve body, is provided with the piston hole of multiple parallel arrangements on the valve body, and there are one range pistons for installation in each piston hole
Bar, each there are one gear shift operation handle, the both ends of each range piston bar and the valves for installation on the range piston bar
The first oil pocket and the second oil pocket are provided between body, first oil pocket and second oil pocket pass through a solenoid-operated proportional respectively
Pressure reducing valve is connect with oil sources, and the positioning end of the range piston bar passes through first oil pocket and is connected with mechanical centering positioning dress
It sets, shaft sealer is installed on the range piston bar between the machinery alignment positioning device and first oil pocket, it is described
Position sensor for detecting the range piston bar bit positions is installed on valve body；It is arranged between the range piston bar
There is interlock；The machinery alignment positioning device is mounted on the end cap on the valve body, is sequentially installed in the end cap logical
The pressure limiting positioning device and mechanical centering device of positioning axis connection are crossed, the pressure limiting positioning device includes being mounted in the end cap
Positioning bushing, the positioning end end of the range piston bar be equipped with stretches into it is described positioning bushing in the locating shaft, institute
It states and is provided with multiple positioning arc grooves disposed in parallel on the inner wall of positioning bushing, be equipped with and the positioning on the locating shaft
The positioning plunger of arc groove cooperation is equipped with plunger locking pressure limiting regulation device in the locating shaft；It is depressurized by solenoid-operated proportional
Valve controls the work of each range piston bar, and positioning and the gear of each gear are realized using pressure limiting positioning device, mechanical interlock
The interlocking of interdigit is detected the bit positions of range piston bar by position sensor, can realize the control of multiple gears and hold
Row work has higher control accuracy and shift reliability, can preferably improve and be promoted the shift of AMT automatic transmission
Quality.
Description of the drawings
The following drawings are only intended to schematically illustrate and explain the present invention, not delimit the scope of the invention.Wherein：
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the A-A sectional views in Fig. 1；
Fig. 3 is the B-B sectional views in Fig. 1；
Fig. 4 is the C-C sectional views in Fig. 1；
Fig. 5 is the D-D sectional views in Fig. 2；
Fig. 6 is the structural schematic diagram for the hydraulic gear-shifting execution system that the embodiment of the present invention is equipped with shift reversal means；
In figure：1- valve bodies；21- the first range piston bars；22- the second range piston bars；23- third range piston bars；31-
First oil pocket；The second oil pockets of 32-；33- two position, three-way electromagnetic change valves；34- solenoid-operated proportional pressure reducing valves；41- axle sleeves；42- is sealed
Circle；43- end caps；44- positions bushing；45- positions plunger；46- locating shafts；47- positions arc groove；48- retaining springs；The positions 5-
Sensor；The mutual lock shafts of 61-；62- interlock slots；63- interlocking plungers；64- selector forks；65- shift reversal meanss；71- centering backing plates；72-
Spring base；73- centralizing springs；74- centering screws；75- spring washers；76- gaskets；81- positions valve rod；82- wedge-shaped impressions；
83- pressure limiting pistons；84- pressure limiting springs；85- pressure limiting oil pockets；86- pressure reducing valves.
Specific implementation mode
With reference to the accompanying drawings and examples, the present invention is further explained.In the following detailed description, only pass through explanation
Mode describes certain exemplary embodiments of the present invention.Undoubtedly, those skilled in the art will recognize,
In the case of without departing from the spirit and scope of the present invention, described embodiment can be repaiied with a variety of different modes
Just.Therefore, attached drawing and description are regarded as illustrative in nature, and are not intended to limit the scope of the claims.
As depicted in figs. 1 and 2, a kind of AMT hydraulic shifts with pressure limiting positioning function execute system, including valve body 1, institute
The piston hole that multiple parallel arrangements are provided on valve body 1 is stated, there are one range piston bar and shapes for installation in each piston hole
At one group of hydraulic cylinder, there are one gear shift operation handles for installation on each range piston bar, as shown in fig. 6, the gear shift operation
Handle includes selector fork 64 or shift reversal means 65, and the is provided between the both ends and the valve body 1 of each range piston bar
One oil pocket 31 and the second oil pocket 32, first oil pocket 31 and second oil pocket 32 pass through a solenoid-operated proportional pressure reducing valve respectively
34 connect with oil sources, and the positioning end of the range piston bar passes through first oil pocket 31 and is connected with mechanical centering positioning dress
It sets, sealing dress is installed on the range piston bar between the machinery alignment positioning device and first oil pocket 31
It sets, the shaft sealer includes being sleeved on the axle sleeve 41 being fixedly connected on the range piston bar and with the valve body 1, described
The inner surface of axle sleeve 41 is provided with seal groove, and sealing ring 42 is equipped in the seal groove, is equipped on the valve body 1 for examining
Survey the position sensor 5 of the range piston bar bit positions；It is provided with interlock between the range piston bar；
As shown in Fig. 2, the machinery alignment positioning device includes the end cap 43 being mounted on the valve body 1, the end cap
The pressure limiting positioning device connected by locating shaft 46 and mechanical centering device, the pressure limiting positioning device packet are sequentially installed in 43
The positioning bushing 44 in the end cap 43 is included, the positioning end end of the range piston bar, which is equipped with, stretches into the positioning
The locating shaft 46 in bushing 44, it is described positioning bushing 44 inner wall on be provided with multiple positioning arc grooves disposed in parallel
47, it is equipped on the locating shaft 46 and positioning plunger 45 that the positioning arc groove 47 coordinates, installation in the locating shaft 46
There is plunger to lock pressure limiting regulation device, the plunger locking pressure limiting regulation device includes the valve rod being arranged in the locating shaft 46
Chamber is equipped with positioning valve rod 81 in the valve-rod cavity, the plunger hole vertical with the valve-rod cavity is provided on the locating shaft 46,
The positioning plunger 45 is mounted in the plunger hole, is provided on the positioning valve rod 81 and positioning plunger 45 cooperation
Wedge-shaped impression 82, it is described positioning valve rod 81 and the mechanical centering device between the valve-rod cavity in retaining spring is installed
48, the other end of the positioning valve rod 81 is connected with the pressure limiting regulation and control oil cylinder being arranged in the range piston bar, the pressure limiting
It includes the pressure limiting oil pocket 85 being arranged in the range piston bar to regulate and control oil cylinder, and pressure limiting piston is equipped in the pressure limiting oil pocket 85
83, pressure limiting spring 84 is installed between the pressure limiting piston 83 and positioning valve rod 81, one end of the pressure limiting spring 84 is resisted against
On the pressure limiting piston 83 and the other end is resisted against the end of the locating shaft 46, and the pressure limiting oil pocket 85 passes through pressure limiting control valve
It being connected to the oil sources, the pressure limiting control valve includes the two position, three-way electromagnetic change valve 33 being connected to the pressure limiting oil pocket 85,
The two position, three-way electromagnetic change valve 33 is connected with pressure reducing valve 86.As shown in figure 5, the interlock includes being arranged in the valve
Body 1 is interior and is connected to the interlocking axis hole in adjacent pistons hole, and mutual lock shaft 61, the range piston pole face are equipped in the interlocking axis hole
It is both provided with interlock slot 62 to the side of the mutual lock shaft 61, connection both sides are provided on the intermediate range piston bar
63 hole of interlocking plunger of interlock slot 62, the interlocking plunger are equipped with interlocking plunger 63 in 63 hole.In the present embodiment, such as Fig. 2, Fig. 3 and
Shown in Fig. 4, the range piston bar includes the first range piston bar 21, the second range piston bar 22 and third range piston bar
23；The both sides of second range piston bar 22 are both provided with interlock slot 62, the first range piston bar 21 and third range piston bar 23
Side towards the second range piston bar 22 is provided with interlock slot 62, and the interlocking plunger 63 is provided on the second range piston bar 22
Hole.In shift process, mutual lock shaft 61 is pushed to be caught in other range piston bars by the cylindrical surface of the range piston bar of work
In interlock slot 62, interlocking is realized.
As described in Figure 2, the mechanical centering device includes the centering backing plate 71 being sleeved on the locating shaft 46, described fixed
The end of position axis 46 is equipped with centering pre-tightening apparatus, and the centering pre-tightening apparatus includes pair mounted on 46 end of the locating shaft
Middle screw 74 is sequentially installed with spring washer 75 and gasket 76 between the nut and the locating shaft 46 of the centering screw 74,
The spring base pressed up against on the centering pre-tightening apparatus and the centering backing plate 71 is installed in opposite directions on the locating shaft 46
72, the outer rim of the gasket 76 is pressed against on the adjacent spring base 72, the positioning between two spring bases 72
Centralizing spring 73 is set on axis 46.
Specifically, as shown in Figure 1, there are three piston holes for setting on the valve body 1, each one is equipped in the piston hole
A range piston bar, as shown in Figure 2, Figure 3 and Figure 4, the range piston bar include that the shift of the first range piston bar 21, second is lived
Stopper rod 22 and third range piston bar 23；The left end of the first range piston bar 21 is connected with the mechanical alignment positioning device
And right end stretches out out of the valve body 1 and is equipped with the gear shift operation handle, 1 He of the valve body in second oil pocket, 32 outside
Sealing ring 42 is installed between the first range piston bar 21；The right end of the third range piston bar 23 is connected with described
Mechanical alignment positioning device and left end stretch out out of the valve body 1 and are equipped with the gear shift operation handle, second oil pocket 32
Sealing ring 42 is installed between the valve body 1 in outside and the third range piston bar 23；The second range piston bar
22 left end is connected with the mechanical alignment positioning device and right end ends in the piston hole of second oil pocket, 32 inside
Interior, the gear shift operation handle is installed on the middle part of the second range piston bar 22.
Three range piston bars can realize that the shift execution work of six gears can be according to change in different gearboxes
Fast device gear quantity exchange gear piston rod and its corresponding pressure limiting positioning device and the quantity of control oil circuit are adjusted.According to change
The setting of fast device gear positions exports the length of shaft part by changing range piston bar, makes shift fork and transmission gear position
Match.First range piston bar 21 as shown in Figure 2 changes the length of its right deferent segment according to gearbox gear positions, makes to dial
It pitches and matches with the position of transmission gear.
The positioning valve rod 81 is provided with wedge-shaped impression 82, and when positioning plunger 45 is in bottom portion of groove, positioning plunger 45 is de-
Positioning arc groove 47 from positioning bushing 44, makes range piston bar that can move left and right.
As shown in fig. 6, the present invention can also be used integrates the identical shift hydraulic cylinder of multigroup structure on valve body 1, changing
Installation shift reversal means 65 carrys out shift fork bar on gear piston rod, and then shift fork completes the technical solution of gear shifting action indirectly.
Below according to Fig. 2 and combine the course of work of the first range piston bar 21 that work original of the invention is explained further
Reason：
1, the positioning of range piston bar
The pressure reducing valve 86 and two position, three-way electromagnetic change valve 33 control pressure limiting oil pocket 85 oil pressure and oil circuit into fuel-displaced
State.
In shift process, two position, three-way electromagnetic change valve 33, which is in right working position, makes oil inlet P connect with pressure limiting oil pocket 85
It is logical, push pressure limiting piston 83 to be moved to the left, pressure limiting piston 83 compresses pressure limiting spring 84 and retaining spring 48 and pushes positioning valve rod
81 move downward, and positioning plunger 45 is made to drop to the bottom portion of groove of positioning valve rod 81, are detached from the positioning arc groove of positioning bushing 44
47。
When range piston bar reaches gear positions, two position, three-way electromagnetic change valve 33 will transition to left working position, make limit
Pumping cavity 85 is connected to fuel tank, under the thrust of pressure limiting spring 84 and retaining spring 48, positions valve rod 81 and pressure limiting piston 83 is right
Shifting, the groove slope driving positioning plunger 45 of positioning valve rod 81, which snaps onto realization in the positioning arc groove 47 for positioning bushing 44, to be determined
Position.
2, shift work
In embodiment as shown in Figure 2, the first range piston bar 21 is in intermediate neutral gear position, and positioning plunger 45 is caught in positioning
In the interfix arc groove 47 of bushing 44, the positioning in the centre position of range piston bar is realized, while by 73 He of centralizing spring
The mechanical centering device of the compositions such as spring base 72 is in Shaft alignment state, and position sensor 5 detects in the first range piston bar 21
Position position.
When corresponding solenoid-operated proportional pressure reducing valve 34 controls the pressure of the first oil pocket 31 and the second oil pocket 32, the first shift of promotion
Piston rod 21 compresses centralizing spring 73 and moves downward, and positions the interfix arc groove that plunger 45 is detached from positioning bushing 44 at this time
47, until range piston bar reaches left side gear positions (extreme position), positioning plunger 45 is embedded into the left end of positioning bushing 44
It positions in arc groove 47, realizes the positioning of range piston bar gear positions.
The operation principle of each group hydraulic cylinder is identical, and details are not described herein.
3, gear interlocking
When there are one shift gears in the first range piston bar 21, the second range piston bar 22 and third range piston bar 23
When work, which will push corresponding mutually lock shaft 61 to be caught in the interlock slot 62 of other two range piston bar, make
Other two range piston bars are stuck, and reach interlocking effect.
Description of the invention provides for the sake of example and description, and is not exhaustively or will be of the invention
It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches
It states embodiment and is to more preferably illustrate the principle of the present invention and practical application, and those skilled in the art is enable to manage
Various embodiments with various modifications of the solution present invention to design suitable for special-purpose.
Claims (8)
1. a kind of AMT hydraulic shifts with pressure limiting positioning function execute system, including valve body, it is characterised in that：The valve body
On be provided with the piston holes of multiple parallel arrangements, installation is each described to change there are one range piston bar in each piston hole
Installation is kept off on piston rod there are one gear shift operation handle, the is provided between the both ends and the valve body of each range piston bar
One oil pocket and the second oil pocket, first oil pocket and second oil pocket are connected by a solenoid-operated proportional pressure reducing valve and oil sources respectively
It connects, the positioning end of the range piston bar passes through first oil pocket and is connected with mechanical alignment positioning device, and the machinery is right
Shaft sealer is installed on the range piston bar between middle positioning device and first oil pocket, is installed on the valve body useful
In the position sensor for detecting the range piston bar bit positions；It is provided with interlock between the range piston bar；
The machinery alignment positioning device includes the end cap being mounted on the valve body, is sequentially installed in the end cap by fixed
The pressure limiting positioning device and mechanical centering device of position axis connection, the pressure limiting positioning device include being mounted in the end cap to determine
Position bushing, the positioning end end of the range piston bar is equipped with the locating shaft stretched into the positioning bushing, described fixed
Multiple positioning arc grooves disposed in parallel are provided on the inner wall of position bushing, are equipped on the locating shaft and the positioning circular arc
The positioning plunger of slot cooperation is equipped with plunger locking pressure limiting regulation device in the locating shaft；
The mechanical centering device includes the centering backing plate being sleeved on the locating shaft, and the end of the locating shaft is equipped with pair
Middle pre-tightening apparatus is equipped on the locating shaft and presses up against on the centering pre-tightening apparatus and the centering backing plate in opposite directions
Spring base is set with centralizing spring on the locating shaft between two spring bases；
The plunger locking pressure limiting regulation device includes the valve-rod cavity being arranged in the locating shaft, is equipped in the valve-rod cavity
Valve rod is positioned, the plunger hole vertical with the valve-rod cavity is provided on the locating shaft, the positioning plunger is mounted on the column
In consent, the wedge-shaped impression with the positioning plunger cooperation, the positioning valve rod and the machine are provided on the positioning valve rod
Retaining spring is installed, the other end of the positioning valve rod, which is connected with, to be arranged in institute in the valve-rod cavity between tool centralising device
State the pressure limiting regulation and control oil cylinder in range piston bar.
2. the AMT hydraulic shifts with pressure limiting positioning function execute system as described in claim 1, it is characterised in that：It is described
Shaft sealer includes being sleeved on the axle sleeve being fixedly connected on the range piston bar and with the valve body, the interior table of the axle sleeve
Face is provided with seal groove, and sealing ring is equipped in the seal groove.
3. the AMT hydraulic shifts with pressure limiting positioning function execute system as described in claim 1, it is characterised in that：It is described
Interlock includes the interlocking axis hole for being arranged in the valve body and being connected to adjacent pistons hole, is equipped in the interlocking axis hole mutually
Lock shaft, the range piston pole face are both provided with interlock slot to the side of the mutual lock shaft, are located at the intermediate range piston
It is provided with the interlocking pin hole of connection both sides interlock slot on bar, interlocking plunger is installed in the interlocking pin hole.
4. the AMT hydraulic shifts with pressure limiting positioning function execute system as described in claim 1, it is characterised in that：It is described
It includes the pressure limiting oil pocket being arranged in the range piston bar that pressure limiting, which regulates and controls oil cylinder, and pressure limiting work is equipped in the pressure limiting oil pocket
Plug is equipped with pressure limiting spring between the pressure limiting piston and positioning valve rod, and one end of the pressure limiting spring is resisted against the pressure limiting
On piston and the other end is resisted against the end of the locating shaft, and the pressure limiting oil pocket is connected by pressure limiting control valve and the oil sources
It is logical.
5. the AMT hydraulic shifts with pressure limiting positioning function execute system as claimed in claim 4, it is characterised in that：It is described
Pressure limiting control valve includes the two position, three-way electromagnetic change valve being connected to the pressure limiting oil pocket, and the two position, three-way electromagnetic change valve connects
It is connected to pressure reducing valve.
6. the AMT hydraulic shifts with pressure limiting positioning function execute system as described in claim 1, it is characterised in that：It is described
Centering pre-tightening apparatus includes the centering screw for being mounted on the positioning shaft end, nut and the locating shaft of the centering screw
Between be sequentially installed with spring washer and gasket, the outer rim of the gasket is pressed against on the adjacent spring base.
7. the AMT hydraulic shifts with pressure limiting positioning function execute system as described in claim 1, it is characterised in that：It is described
Gear shift operation handle includes selector fork or shift reversal means.
8. the AMT hydraulic shifts with pressure limiting positioning function as described in claim 1 to 7 any claim execute system,
It is characterized in that：There are three piston holes for setting on the valve body, and there are one range piston bar, institutes for each interior installation of the piston hole
It includes the first range piston bar, the second range piston bar and third range piston bar to state range piston bar；
The left end of the first range piston bar is connected with the mechanical alignment positioning device and right end is stretched out out of described valve body
And the gear shift operation handle is installed, the peace between the valve body and the first range piston bar on the outside of second oil pocket
Equipped with sealing ring；
The right end of the third range piston bar is connected with the mechanical alignment positioning device and left end is stretched out out of described valve body
And the gear shift operation handle is installed, the peace between the valve body and the third range piston bar on the outside of second oil pocket
Equipped with sealing ring；
The left end of the second range piston bar is connected with the mechanical alignment positioning device and right end ends in second oil
In the piston hole of intracavitary side, the gear shift operation handle is installed on the middle part of the second range piston bar.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710045884.6A CN106641235B (en) | 2017-01-22 | 2017-01-22 | A kind of AMT hydraulic shifts execution system with pressure limiting positioning function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710045884.6A CN106641235B (en) | 2017-01-22 | 2017-01-22 | A kind of AMT hydraulic shifts execution system with pressure limiting positioning function |
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| CN106641235A CN106641235A (en) | 2017-05-10 |
| CN106641235B true CN106641235B (en) | 2018-08-28 |
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