CN108999967A - Shifting vehicle gearbox axis triangle sliding slot optimum design method - Google Patents
Shifting vehicle gearbox axis triangle sliding slot optimum design method Download PDFInfo
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- CN108999967A CN108999967A CN201810616615.5A CN201810616615A CN108999967A CN 108999967 A CN108999967 A CN 108999967A CN 201810616615 A CN201810616615 A CN 201810616615A CN 108999967 A CN108999967 A CN 108999967A
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- sliding slot
- curved surface
- shift block
- shift
- surface sliding
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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
-
- 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
- F16H63/34—Locking or disabling mechanisms
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
-
- 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
- F16H2063/3076—Selector shaft assembly, e.g. supporting, assembly or manufacturing of selector or shift shafts; Special details thereof
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Geometry (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Evolutionary Computation (AREA)
- Mechanical Engineering (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
Technical problem to be solved by the invention is to provide a kind of optimum design methods of d-axis chute-type gearshift chute size, establish curved surface sliding slot shift block sliding slot kinetic model, the optimization design objective function for establishing curved surface sliding slot shift block sliding slot optimum shape establishes the constraint condition of curved surface sliding slot shift block sliding slot optimum shape.According to the kinetic model for the curved surface sliding slot shift block sliding slot system established in step (1), the minimum value of established optimization design objective function J in step (2) is sought using optimization algorithm, with the constraint condition for the curved surface sliding slot shift block sliding slot optimum shape that step (3) are established, the optimal design variable of corresponding design curved surface sliding slot shift block radius and curved surface sliding slot shift block sliding slot height is calculated.
Description
Technical field
The present invention relates to a kind of automotive transmission d-axis sliding slot optimum design method, especially a kind of automotive transmission d-axis
Sliding slot optimum design method.
Background technique
In automobile industry, the superiority and inferiority of shift of transmission performance directly affects the fuel economy of automobile, smooth gear shifting
With the performances such as riding comfort.The main purpose of shift process control is to increase the ride comfort of shift and driving is made more to relax
It is suitable, the dynamic loading of power train is reduced, the service life of part is increased, clutch friction plate thermic load is reduced, improves clutch
Functional reliability and durability generate shift shock, the shift such as power interruption unstable phenomenon when reducing shift.The process of shift
Usually a binding member combines, the process of another binding member separation.If separation and the knot of the two binding members
The time of conjunction is improper to will cause that shift is unstable, and overlap joint will cause power thousand too early and relate to, and crosses party and generates power interruption, shift member
The separation of part and the effective cooperation for combining needs machinery and control system, still, current steerable system is in the presence of structure is complicated, behaviour
The vertical time is difficult to the problem of being accurately controlled.The present invention realizes the procedural behaviour that mechanically shifts gears using d-axis chute-type gearshift
Make, reduces the manipulation workload of driver, improve the economy of fuel oil, also can be widely used to the automatic control of transmission for vehicles
Work processed.In shift design, need to consider that shifting shaft driving moment, shift fork sliding axle frictional force, shift shaft diameter, shift are axial
The factors such as power.Shifting shaft sliding groove structure has direct influence to shift ride comfort, but designs d-axis sliding slot and need consideration more
How a parametric variable finds out one of optimal parametric variable combination or shifting shaft sliding groove structure problem to be solved.
Summary of the invention
For above-mentioned defect existing in the prior art, it is sliding that technical problem to be solved by the invention is to provide a kind of d-axis
The optimum design method of slot type gearshift chute size, structural model figure are as Figure 1-Figure 5.
D-axis chute-type gearshift is made of shift fork system and shift drive system.Shift fork system is by shift fork axle, shift fork
It is formed with shift fork sliding axle, shift fork axle is cross-section circle straight-bar, and both ends are fixedly connected with gear box casing, and surface is smooth, is dialled
Fork can be moved left and right by shift fork hole and shift fork axis connection, shift fork along shift fork axle axial direction；Shift fork sliding axle is to wait to cut
Face circle straight-bar, surface is smooth, and one end is fixedly connected with shift fork, and the other end is embedded in curved surface sliding slot shift block sliding slot and slides with curved surface
The contact of slot shift block sliding slot side.Shift drive system is by shift drive shaft and shift drive shaft drive gear set at shift is driven
End shaft is connect by bearing with gear box casing, and curved surface sliding slot shift block and shift drive shaft consolidation, shift drive shaft are driven
Moving gear and shift drive shaft consolidation.
Curved surface sliding slot shift block sliding slot is made of straight part and curve chute part, when clutch disconnection, shift
When drive shaft is rotated clockwise from neutral gear position, curved surface sliding slot shift block is rotated with shift drive shaft, curved surface sliding slot shift block
Shift fork sliding axle generates the axial displacement of dextrad, and shift fork sliding axle pushes the axial position of the shift fork generation dextrad consolidated with it
It moves, shift fork pushes the axial displacement of combined cover generation dextrad, which is equal to selector fork shift spacing and engages spacing with gear
And when, complete gear shifting action, clutch closure.
Sliding slot track optimum design method provided by the present invention, it is characterised in that use following design procedure:
(1) curved surface sliding slot shift block sliding slot kinetic model is established:
Design curved surface sliding slot shift block sliding slot driving structure will determine the dimensional parameters and shape of sliding groove structure, these parameters
Variation directly affect shift fluency.Curved surface sliding slot shift block sliding slot track is designed as to triangular shaped, drive shaft of shifting gears
It rotates a circle and needs to hang five gears, be one to four gear and neutral gear gear respectively, the perimeter of curved surface sliding slot shift block is 2 π r, often
A gear curved surface sliding slot shift block sliding slot bottom edge AC length is 1/5th of curved surface sliding slot shift block perimeter, so curved surface sliding slot
The length on shift block sliding slot bottom edge is 2 π r/5, and the driving torque that shift sliding tooth wheel acts on shift drive shaft is
In formula, r is the radius of curved surface sliding slot shift block, and h is the height of curved surface sliding slot shift block sliding slot, and μ is shift fork sliding
Coefficient of friction between axis and curved surface sliding slot shift block sliding slot side, FyIt is that shift fork generates axial force to shift drive shaft.It calculates
The driving torque numerical value of shift drive shaft in the case of different designs parameter determines the size ginseng of curved surface sliding slot shift block sliding slot
Number designs the shape of curved surface sliding slot shift block sliding slot.
(2) the optimization design objective function J of curved surface sliding slot shift block sliding slot optimum shape is established:
According to the kinetic model for the curved surface sliding slot shift block sliding slot system established in step (1), changed with curved surface sliding slot
Block radius and curved surface sliding slot shift block sliding slot height are design variable, establish curved surface sliding slot shift block radius and curved surface sliding slot changes
The block sliding slot optimal optimization design objective function J of height, i.e.,
J=M；
(3) constraint condition of curved surface sliding slot shift block sliding slot optimum shape is established:
According to the kinetic model for the curved surface sliding slot shift block sliding slot system established in step (1), the shift of curved surface sliding slot
It is positive value that block radius and curved surface sliding slot shift block sliding slot height, which are design variable, and in reasonable scope of design, i.e.,
H >=0, h≤0.08；R >=0, r≤0.08；
In order to calculate reasonable optimization calculating parameter, enable curved surface sliding slot shift block sliding slot height and curved surface sliding slot shift block sliding
Slot bottom edge lengths meet golden section rule, i.e.,
H=0.618*2 π r/5；
(4) optimization design of curved surface sliding slot shift block radius and curved surface sliding slot shift block sliding slot height:
According to the kinetic model for the curved surface sliding slot shift block sliding slot system established in step (1), optimization algorithm is utilized
The minimum value of established optimization design objective function J in step (2) is sought, the curved surface sliding slot shift block sliding slot established with step (3)
The constraint condition of optimum shape calculates corresponding design curved surface sliding slot shift block radius and curved surface sliding slot shift block sliding slot height
Optimal design variable.
The invention has the following advantages over the prior art:
1. designing the optimal design variable of curved surface sliding slot shift block radius and curved surface sliding slot shift block sliding slot height, provide most
Small shift sliding tooth wheel acts on the driving torque of shift drive shaft.
2. d-axis chute-type shifting system can be effectively reduced between shift fork sliding axle and curved surface sliding slot shift block sliding slot side
Frictional dissipation extends the service life of shifting system.
Detailed description of the invention
The invention patent is further illustrated with reference to the accompanying drawings and examples.
1 automotive transmission d-axis chute-type gear shifting structure schematic diagram of attached drawing；
2 automotive transmission d-axis chute-type shifting shaft of attached drawing and curved surface sliding slot shift block structural schematic diagram；
3 shift fork of attached drawing and shift fork sliding axle schematic diagram；
4 curved surface sliding slot shift block triangle sliding slot shape graph of attached drawing；
5 curved surface sliding slot shift block triangle sliding groove structure schematic diagram of attached drawing.
1, shift fork axle, 2, shift fork, 3, shift fork sliding axle, 4, shift driving gear, 5, curved surface sliding slot shift block, 6, shift drive
Moving axis
Specific embodiment
1 to Fig. 5 the present invention is further described with reference to the accompanying drawing:
D-axis chute-type gearshift is made of shift fork system and shift drive system.Shift fork system is by shift fork axle 1, shift fork
2 and shift fork sliding axle 3 form, shift fork axle 1 is cross-section circle straight-bar, and both ends are fixedly connected with gear box casing, and surface is smooth,
Shift fork 2 is connect by shift fork hole with shift fork axle 1, and shift fork 2 can be moved left and right along 1 axial direction of shift fork axle；Shift fork sliding axle 3
For cross-section circle straight-bar, surface is smooth, and one end is fixedly connected with shift fork, and the other end is embedded in 5 sliding slot of curved surface sliding slot shift block simultaneously
It is contacted with 5 sliding slot side of curved surface sliding slot shift block.Shift drive system drives gear 4 by shift drive shaft 6 and shift drive shaft
Composition, shift 6 both ends of drive shaft are connect by bearing with gear box casing, and curved surface sliding slot shift block 5 and shift drive shaft 6 are solid
Knot, shift drive shaft driving gear 4 and shift drive shaft 6 consolidate.
5 sliding slot of curved surface sliding slot shift block is made of straight part and curve chute part, when clutch disconnection, shift
When drive shaft 6 is rotated clockwise from neutral gear position, curved surface sliding slot shift block 5 is rotated with shift drive shaft 6, the shift of curved surface sliding slot
5 shift fork of block, 2 sliding axle generates the axial displacement of dextrad, and shift fork sliding axle 3 pushes the shift fork 2 consolidated with it to generate dextrad
Axial displacement, shift fork 2 push the axial displacement of combined cover generation dextrad, which is equal to selector fork shift spacing and nibbles with gear
Close spacing and when, complete gear shifting action, clutch closure；
Sliding slot track optimum design method provided by the present invention, it is characterised in that use following design procedure:
(1) 5 sliding slot kinetic model of curved surface sliding slot shift block is established:
Design 5 sliding slot driving structure of curved surface sliding slot shift block will determine the dimensional parameters and shape of sliding groove structure, these ginsengs
Several variations directly affects shift fluency；5 sliding slot track of curved surface sliding slot shift block is designed as to triangular shaped, shift driving
Axis 6, which rotates a circle, needs to hang five gears, is one to four gear and neutral gear gear respectively, the perimeter of curved surface sliding slot shift block 5 is 2 π
R, each 5 sliding slot bottom edge AC length of gear curved surface sliding slot shift block is 1/5th of 5 perimeter of curved surface sliding slot shift block, so bent
The length on 5 sliding slot bottom edge of face sliding slot shift block is 2 π r/5, and the driving torque that shift driving gear 4 acts on shift drive shaft 6 is
In formula, r is the radius of curved surface sliding slot shift block 5, and h is the height of 5 sliding slot of curved surface sliding slot shift block, and μ is that shift fork is sliding
Coefficient of friction between 5 sliding slot side of moving axis 3 and curved surface sliding slot shift block, FyIt is that 2 pairs of shift drive shafts 6 of shift fork generate axial force；
The driving torque numerical value for calculating the shift drive shaft 6 in different designs parameter, determines 5 sliding slot of curved surface sliding slot shift block
Dimensional parameters design the shape of 5 sliding slot of curved surface sliding slot shift block；
(2) the optimization design objective function J of 5 sliding slot optimum shape of curved surface sliding slot shift block is established:
According to the kinetic model for the 5 sliding slot system of curved surface sliding slot shift block established in step (1), changed with curved surface sliding slot
5 radius of block and 5 sliding slot height of curved surface sliding slot shift block are design variable, establish 5 radius of curved surface sliding slot shift block and curved surface is sliding
The optimal optimization design objective function J of slot shift block 5 sliding slot height, it may be assumed that
J=M；
(3) constraint condition of 5 sliding slot optimum shape of curved surface sliding slot shift block is established:
According to the kinetic model for the 5 sliding slot system of curved surface sliding slot shift block established in step (1), the shift of curved surface sliding slot
It is positive value that 5 radius of block and 5 sliding slot height of curved surface sliding slot shift block, which are design variable, and in reasonable scope of design, i.e.,
H >=0, h≤0.08；R >=0, r≤0.08；
In order to calculate reasonable optimization calculating parameter, 5 sliding slot height of curved surface sliding slot shift block and curved surface sliding slot shift block 5 are enabled
Sliding slot bottom edge length meets golden section rule, i.e.,
H=0.618*2 π r/5；
(4) optimization design of 5 sliding slot height of 5 radius of curved surface sliding slot shift block and curved surface sliding slot shift block:
According to the kinetic model for the 5 sliding slot system of curved surface sliding slot shift block established in step (1), optimization algorithm is utilized
The minimum value of established optimization design objective function J in step (2) is sought, 5 sliding slot of curved surface sliding slot shift block established with step (3)
It is high to calculate corresponding 5 radius of design curved surface sliding slot shift block and 5 sliding slot of curved surface sliding slot shift block for the constraint condition of optimum shape
The optimal design variable of degree.
When coefficient of friction between 1. shift fork sliding axle 3 of example and sliding slot is 0.2 and axial force is 50N, optimize calculating arrives h
=0.062m, r=0.08m, shift drive shaft driving torque minimum value are 3.73Nm；
When coefficient of friction between 2. shift fork sliding axle 3 of example and sliding slot is 0.1 and axial force is 50N, optimize calculating arrives h
=0.062m, r=0.08m, shift drive shaft driving torque minimum value are 3.06Nm；
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
In the spirit and principles in the present invention, made any modification, equivalent replacement and improvement should be included in guarantor of the present invention
Within the scope of shield.
Claims (1)
1. sliding slot track optimum design method provided by the present invention, it is characterised in that use following design procedure:
(1) sliding slot kinetic model is established:
Design curved surface sliding slot shift block (5) sliding slot driving structure will determine the dimensional parameters and shape of sliding groove structure, these parameters
Variation directly affect shift fluency；Curved surface sliding slot shift block (5) sliding slot track is designed as to triangular shaped, shift driving
Axis (6), which rotates a circle, needs to hang five gears, is one to four gear and neutral gear gear, the perimeter of curved surface sliding slot shift block (5) respectively
2 π r, each gear curved surface sliding slot shift block (5) sliding slot bottom edge AC length be curved surface sliding slot shift block (5) perimeter five/
One, so the length on curved surface sliding slot shift block (5) sliding slot bottom edge is 2 π r/5, shift driving gear (4) acts on shift drive shaft
(6) driving torque is
In formula, r is the radius of curved surface sliding slot shift block (5), and h is the height of curved surface sliding slot shift block (5) sliding slot, and μ is that shift fork is sliding
Coefficient of friction between moving axis (3) and curved surface sliding slot shift block (5) sliding slot side, FyIt is that shift fork (2) generates shift drive shaft (6)
Axial force；The driving torque numerical value for calculating the shift drive shaft (6) in different designs parameter determines that curved surface sliding slot is shifted gears
The dimensional parameters of block (5) sliding slot design the shape of curved surface sliding slot shift block (5) sliding slot；
(2) the optimization design objective function J of curved surface sliding slot shift block (5) sliding slot optimum shape is established:
According to the kinetic model of curved surface sliding slot shift block (5) the sliding slot system established in step (1), with the shift of curved surface sliding slot
Block (5) radius and curved surface sliding slot shift block (5) sliding slot height are design variable, establish curved surface sliding slot shift block (5) radius and song
The optimal optimization design objective function J of face sliding slot shift block (5) sliding slot height, i.e.,
J=M；
(3) constraint condition of curved surface sliding slot shift block (5) sliding slot optimum shape is established:
According to the kinetic model of curved surface sliding slot shift block (5) the sliding slot system established in step (1), curved surface sliding slot shift block
(5) it is positive value that radius and curved surface sliding slot shift block (5) sliding slot height, which are design variable, and in reasonable scope of design,
I.e.
H >=0, h≤0.08；R >=0, r≤0.08；
In order to calculate reasonable optimization calculating parameter, curved surface sliding slot shift block (5) sliding slot height and curved surface sliding slot shift block (5) are enabled
Sliding slot bottom edge length meets golden section rule, i.e.,
H=0.618*2 π r/5；
(4) optimization design of curved surface sliding slot shift block (5) radius and curved surface sliding slot shift block (5) sliding slot height:
According to the kinetic model of curved surface sliding slot shift block (5) the sliding slot system established in step (1), asked using optimization algorithm
The minimum value of established optimization design objective function J in step (2), curved surface sliding slot shift block (5) sliding slot established with step (3)
It is sliding to calculate corresponding design curved surface sliding slot shift block (5) radius and curved surface sliding slot shift block (5) for the constraint condition of optimum shape
The optimal design variable of groove height.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810616615.5A CN108999967A (en) | 2018-06-15 | 2018-06-15 | Shifting vehicle gearbox axis triangle sliding slot optimum design method |
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| CN201810616615.5A CN108999967A (en) | 2018-06-15 | 2018-06-15 | Shifting vehicle gearbox axis triangle sliding slot optimum design method |
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| CN201810616615.5A Pending CN108999967A (en) | 2018-06-15 | 2018-06-15 | Shifting vehicle gearbox axis triangle sliding slot optimum design method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100229668A1 (en) * | 2009-03-16 | 2010-09-16 | Eaton Corporation | Multiple-Ratio Transmission with Concentric Offset Shift Forks |
| CN102287527A (en) * | 2011-07-26 | 2011-12-21 | 浙江吉利汽车研究院有限公司 | Transmission shift mechanism |
| KR20160082450A (en) * | 2014-12-30 | 2016-07-08 | 현대다이모스(주) | Shift control apparatus for manual transmission |
| CN206017695U (en) * | 2016-08-04 | 2017-03-15 | 宁波天业精密铸造有限公司 | Clutch speed changer selector fork mechanism |
-
2018
- 2018-06-15 CN CN201810616615.5A patent/CN108999967A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100229668A1 (en) * | 2009-03-16 | 2010-09-16 | Eaton Corporation | Multiple-Ratio Transmission with Concentric Offset Shift Forks |
| CN102287527A (en) * | 2011-07-26 | 2011-12-21 | 浙江吉利汽车研究院有限公司 | Transmission shift mechanism |
| KR20160082450A (en) * | 2014-12-30 | 2016-07-08 | 현대다이모스(주) | Shift control apparatus for manual transmission |
| CN206017695U (en) * | 2016-08-04 | 2017-03-15 | 宁波天业精密铸造有限公司 | Clutch speed changer selector fork mechanism |
Non-Patent Citations (1)
| Title |
|---|
| 钟再敏等: "鼓式凸轮式选换挡执行机构效率分析", 《机械传动》 * |
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Application publication date: 20181214 |