CN114791040A - Gear shifting actuating mechanism of gearbox - Google Patents

Gear shifting actuating mechanism of gearbox Download PDF

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Publication number
CN114791040A
CN114791040A CN202210525296.3A CN202210525296A CN114791040A CN 114791040 A CN114791040 A CN 114791040A CN 202210525296 A CN202210525296 A CN 202210525296A CN 114791040 A CN114791040 A CN 114791040A
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CN
China
Prior art keywords
gear
piston
cavity
port
push
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Pending
Application number
CN202210525296.3A
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Chinese (zh)
Inventor
张俊强
贺勃
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Bobang Heavy Industry Co ltd
Original Assignee
Hunan Bobang Heavy Industry Co ltd
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Filing date
Publication date
Application filed by Hunan Bobang Heavy Industry Co ltd filed Critical Hunan Bobang Heavy Industry Co ltd
Priority to CN202210525296.3A priority Critical patent/CN114791040A/en
Publication of CN114791040A publication Critical patent/CN114791040A/en
Pending legal-status Critical Current

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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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • 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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
    • 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
    • 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
    • F16H63/32—Gear shift yokes, e.g. shift forks

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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 gear shifting actuating mechanism of a gearbox, wherein a shifting fork shaft is arranged on the right side in a shell, a gear shifting fork is arranged on the shifting fork shaft, a first cavity, a second cavity and a third cavity are arranged in the shell, a first piston is arranged between the first cavity and the second cavity, a second piston is arranged between the second cavity and the third cavity, the first piston and the second piston are coaxially arranged, the first piston is connected with the shifting fork shaft, the second piston is arranged on the left side in the shell, a gas port B, a gas port F and a gas port M are formed in the shell, the gas port B is communicated with the first cavity, the gas port F is communicated with the second cavity, and the gas port M is communicated with the third cavity. The automatic gearbox adopts the air source to realize automatic gear shifting of the gearbox, improves the gear shifting response and precision of the automatic gearbox, and has the advantages of ingenious structure and strong practicability.

Description

Gear shifting actuating mechanism of gearbox
Technical Field
The invention relates to the field of machinery, in particular to a gear shifting actuating mechanism of a gearbox.
Background
The transmission has the characteristics of high efficiency, low cost and mature production process, and still has a large market share at present. However, the manual transmission has the defects of difficult gear shifting, power interruption, great influence of the driver level on the vehicle running performance and the like, and the driving fatigue of the driver is easily caused due to frequent manual gear shifting operation, so that the unsafe factors of driving are increased. Therefore, an automatic transmission replaces a manual transmission to become the mainstream, but the automatic transmission brings comfort and convenience, and meanwhile has the defects of high oil consumption, high cost and difficult maintenance, and an electronic control mechanical automatic transmission (AMT) is produced in the environment.
At present, a permanent magnet synchronous brushless direct current motor is selected as an automatic gearbox gear selecting and shifting motor to output mechanical motion as rotary motion, and the mechanical motion needs to be converted into linear motion through a mechanical structure to perform gear selecting and shifting, so that the inevitable problems of slow gear shifting response, low mechanical efficiency and the like are caused.
In summary, in the prior art, an effective solution is not yet available for the problem of how to improve the gear selection and shift response and the accuracy of the automatic transmission.
Disclosure of Invention
In view of this, the invention provides a gear shifting actuating mechanism of a gearbox, which adopts an air source to realize automatic gear shifting of the gearbox, improves gear selecting and shifting response and precision of the automatic gearbox, and has the advantages of ingenious structure and strong practicability.
On one hand, the invention provides a gear shifting actuating mechanism of a gearbox, wherein a shifting fork shaft is arranged on the right side in a shell, and a gear shifting fork is arranged on the shifting fork shaft.
Further, the effective active area of the first piston is smaller than the effective active area of the second piston.
Furthermore, a second piston right end limiting step is arranged between the second cavity and the third cavity, and when the second piston abuts against the limiting step, the left end of the shifting fork shaft abuts against the second piston.
The gear shifting fork is driven to deflect by the execution valve; the execution valve is provided with an L air port and an R air port, when the air source enters the execution valve from the L air port to push the gear shifting fork to deflect downwards to enter a low-speed gear region, and when the air source enters the execution valve from the R air port to push the gear shifting fork to deflect upwards to enter a quick-speed gear region.
And furthermore, when an air source enters the execution valve from the L air port to push the gear shifting fork to deflect downwards to enter a low-speed gear, the air source enters the first cavity from the B air port to push the first piston to move leftwards, the shifting fork shaft moves leftwards to push the second piston to the left end, the gear shifting fork moves to the left end, and the gearbox is hung in the first gear.
And furthermore, when an air source enters the execution valve from the L air port to push the gear shifting fork to deflect downwards to enter a low-speed gear, the air source enters the second cavity from the F air port to push the first piston to move rightwards, the shifting fork shaft moves rightwards to drive the gear shifting fork to move to the right end, and the gearbox is hung in the second gear.
And furthermore, when an air source enters the execution valve from the L air port to push the gear shifting fork to deflect downwards to enter a low-speed gear, the air source enters the third cavity from the M air port to push the second piston to move rightwards, the air source enters the first cavity from the B air port to push the first piston to move leftwards, and as the effective action area of the first piston is smaller than that of the second piston, the second piston abuts against a limiting step, the left end of the shifting fork shaft abuts against the second piston, the gear shifting fork is in the middle position, and the gearbox is hung in the third gear.
And furthermore, when an air source enters the execution valve from the R air port to push the gear shifting fork to deflect upwards to enter the fast gear, the air source enters the third cavity from the M air port to push the second piston to move rightwards, the air source enters the first cavity from the B air port to push the first piston to move leftwards, the effective action area of the first piston is smaller than that of the second piston, the second piston abuts against the limiting step, the left end of the shifting fork shaft abuts against the second piston, the gear shifting fork is located at the middle position, and the gearbox is hung in a fourth gear.
And furthermore, when an air source enters the execution valve from the R air port to push the gear shifting fork to deflect upwards to enter a quick gear, the air source enters the second cavity from the F air port to push the first piston to move rightwards, the shifting fork shaft moves rightwards to drive the gear shifting fork to move to the right end, and the gearbox is hung in the fifth gear.
And furthermore, when an air source enters the execution valve from the R air port to push the gear shifting fork to deflect upwards to enter a quick gear, the air source enters the first cavity from the B air port to push the first piston to move leftwards, the shifting fork shaft moves leftwards to push the second piston to the left end, the gear shifting fork moves to the left end, and the gearbox is hung in the sixth gear.
Compared with the prior art, the gear shifting actuating mechanism of the gearbox has the beneficial effects that:
1. because compressed air response speed is fast, adopt the air supply to realize gearbox automatic shifting, improve automatic transmission's the selection response of shifting and precision, the structure is ingenious, and the practicality is strong.
2. The gear shifting actuating mechanism of the gearbox is provided with six gears, can automatically select and shift gears, and is ingenious in structure and high in practicability.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a gear shifting actuating mechanism of a gearbox.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, the invention provides a gear shifting actuator of a transmission, a shift fork shaft 11 is installed on the right side in a casing 10, a gear shift fork 12 is installed on the shift fork shaft 11, a first cavity 14, a second cavity 15 and a third cavity 16 are arranged in the casing 10, a first piston 18 is arranged between the first cavity 14 and the second cavity 15, a second piston 17 is arranged between the second cavity 15 and the third cavity 16, the first piston 18 and the second piston 17 are coaxially arranged, the first piston 18 is connected with the shift fork shaft 11, the second piston 17 is installed on the left side in the casing 10, and a gas port B, a gas port F and a gas port M are opened on the casing 10, the gas port B is communicated with the first cavity 14, the gas port F is communicated with the second cavity 15, and the gas port M is communicated with the third cavity 16. The effective area of the first piston 18 is smaller than the effective area of the second piston 17, so that the thrust of the first piston 18 is smaller than the thrust of the second piston 17 for the same supply pressure. A limit step 19 at the right end of the second piston 17 is arranged between the second cavity 15 and the third cavity 16, and when the second piston 17 abuts against the limit step 19, the left end of the declutch shift shaft 11 abuts against the second piston 17.
The gear shifting fork device comprises an execution valve 13, a shifting fork gear 120 is arranged on a gear shifting fork 12, a rack 130 is arranged on the execution valve 13, the shifting fork gear 120 is meshed with the rack 130, and the execution valve 13 drives the gear shifting fork 12 to deflect; an L air port and an R air port are arranged on the execution valve 13, when an air source enters the execution valve 13 from the L air port, the gear shifting fork 12 is pushed to deflect downwards to enter a low-speed gear region, and when the air source enters the execution valve 13 from the R air port, the gear shifting fork 12 is pushed to deflect upwards to enter a fast-speed gear region.
When an air source enters an execution valve 13 from an L air port to push a gear shifting fork 12 to deflect downwards to enter a low-speed gear, the air source enters a first cavity 14 from a B air port to push a first piston 18 to move left, a shifting fork shaft 11 moves left to push a second piston 17 to the left end, the gear shifting fork 12 moves to the left end, and a gearbox is engaged in a first gear.
Including the second gear, be the low gear, when the air supply got into execute valve 13 by the L gas port and promoted the downward deflection of fender shift fork 12 and get into low gear region, the air supply got into second cavity 15 by the F gas port simultaneously and promotes first piston 18 and move to the right side, shift fork shaft 11 moves to the right side and drives fender shift fork 12 and move to the right-hand member, and the gearbox is put into the second and is kept off the position.
The gear shifting fork comprises a third gear, namely a low-speed region neutral gear, when an air source enters an execution valve 13 from an L air port to push a gear shifting fork 12 to deflect downwards to enter the low-speed gear, the air source enters a third cavity 16 from an M air port to push a second piston 17 to move right, the air source enters a first cavity 14 from a B air port to push a first piston 18 to move left, because the effective action area of the first piston 18 is smaller than that of the second piston 17, the second piston 17 abuts against a limiting step 19, the left end of a shifting fork shaft 11 abuts against the second piston 17, the gear shifting fork 12 is in a middle position, and the gearbox is hung in the third gear.
The gear shifting fork is characterized by comprising a fourth gear, namely a fast-speed region neutral gear, when an air source enters an execution valve 13 from an R air port to push a gear shifting fork 12 to deflect upwards to enter the fast-speed gear, the air source enters a third cavity 16 from an M air port to push a second piston 17 to move right, the air source enters a first cavity 14 from a B air port to push a first piston 18 to move left, the effective action area of the first piston 18 is smaller than that of the second piston 17, the second piston 17 abuts against a limiting step 19, the left end of a shifting fork shaft 11 abuts against the second piston 17, the gear shifting fork 12 is located at a middle position, and the gearbox is hung in the fourth gear.
When an air source enters the execution valve 13 from an R air port to push the gear shifting fork 12 to deflect upwards to enter a quick gear, the air source enters the second cavity 15 from an F air port to push the first piston 18 to move rightwards, the shifting fork shaft 11 moves rightwards to drive the gear shifting fork 12 to move to the right end, and the gearbox is hung in the fifth gear.
When an air source enters the execution valve 13 from an R air port to push the gear shifting fork 12 to deflect upwards to enter the fast gear, the air source enters the first cavity 14 from a B air port to push the first piston 18 to move leftwards, the shifting fork shaft 11 moves leftwards to push the second piston 17 to the left end, the gear shifting fork 12 moves to the left end, and the gearbox is hung in the sixth gear.
The techniques not described above are common general knowledge of the skilled person. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A gear shifting actuating mechanism of a gearbox is characterized in that a first cavity, a second cavity and a third cavity are arranged in the shell, a first piston is arranged between the first cavity and the second cavity, a second piston is arranged between the second cavity and the third cavity, the first piston and the second piston are coaxially arranged, the first piston is connected with the shifting fork shaft, the second piston is arranged on the left side in the shell, a gas port B, a gas port F and a gas port M are formed in the shell, the gas port B is communicated with the first cavity, the gas port F is communicated with the second cavity, and the gas port M is communicated with the third cavity.
2. A transmission shift actuator as set forth in claim 1 wherein the first piston has an effective active area less than the second piston effective active area.
3. A gearbox gear shift actuator as defined in claim 2 wherein a second piston right end stop step is provided between the second chamber and the third chamber, the left end of the fork shaft abutting against the second piston when the second piston abuts against the stop step.
4. The gearbox gear shifting actuating mechanism according to claim 3, comprising an actuating valve, wherein a shifting fork gear is arranged on the gear shifting fork, a rack is arranged on the actuating valve, the shifting fork gear is meshed with the rack, and the actuating valve drives the gear shifting fork to deflect; the execution valve is provided with an L air port and an R air port, when an air source enters the execution valve from the L air port to push the gear shifting fork to deflect downwards to enter a low-speed gear region, and when the air source enters the execution valve from the R air port to push the gear shifting fork to deflect upwards to enter a high-speed gear region.
5. The transmission shift actuator of claim 4, comprising a first gear, wherein when the air supply enters the actuator valve through the L port to push the gear shift fork to deflect downward into a low speed gear, the air supply enters the first cavity through the B port to push the first piston to move left, the shift fork shaft moves left to push the second piston to the left, the gear shift fork moves to the left, and the transmission is engaged with the first gear.
6. The transmission shift actuator of claim 4, comprising a second gear, wherein when the air supply enters the actuator valve through the L port to push the gear fork to deflect downward into the low speed gear, the air supply enters the second cavity through the F port to push the first piston to move right, the shift fork shaft moves right to drive the gear fork to move to the right end, and the transmission is engaged into the second gear.
7. The gear shifting actuating mechanism of the gearbox according to claim 4, wherein a third gear is included, when an air source enters the actuating valve from an L air port to push the gear shifting fork to deflect downwards to enter a low-speed gear, the air source enters the third cavity from an M air port to push the second piston to move right, the air source enters the first cavity from a B air port to push the first piston to move left, the effective action area of the first piston is smaller than that of the second piston, the second piston abuts against a limiting step, the left end of the shifting fork shaft abuts against the second piston, the gear shifting fork is in a middle position, and the gearbox is hung in the third gear.
8. The transmission shift actuator of claim 4, wherein the transmission shift actuator includes a fourth gear, and when the air supply enters the actuator valve through the R port to push the gear shift fork to deflect upward into the fast gear, the air supply enters the third cavity through the M port to push the second piston to move right, and the air supply enters the first cavity through the B port to push the first piston to move left, and since the effective area of the first piston is smaller than that of the second piston, the second piston abuts against the limit step, the left end of the shift fork shaft abuts against the second piston, the gear shift fork is in a middle position, and the transmission is engaged into the fourth gear.
9. The gearbox gear shifting actuating mechanism according to claim 4, wherein a fifth gear is included, when an air source enters the actuating valve through the R air port to push the gear shifting fork to deflect upwards to enter a fast gear, the air source enters the second cavity through the F air port to push the first piston to move right, the shifting fork shaft moves right to drive the gear shifting fork to move to the right end, and the gearbox is shifted into the fifth gear.
10. The transmission shift actuator of claim 4, wherein the sixth gear is selected such that when the air supply enters the actuator valve through the R port to force the gear fork to deflect upward into the upshift, the air supply enters the first chamber through the B port to force the first piston to move to the left, the fork shaft moves to the left to force the second piston to the left, the gear fork moves to the left, and the transmission is engaged in the sixth gear.
CN202210525296.3A 2022-05-15 2022-05-15 Gear shifting actuating mechanism of gearbox Pending CN114791040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210525296.3A CN114791040A (en) 2022-05-15 2022-05-15 Gear shifting actuating mechanism of gearbox

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210525296.3A CN114791040A (en) 2022-05-15 2022-05-15 Gear shifting actuating mechanism of gearbox

Publications (1)

Publication Number Publication Date
CN114791040A true CN114791040A (en) 2022-07-26

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ID=82463199

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210525296.3A Pending CN114791040A (en) 2022-05-15 2022-05-15 Gear shifting actuating mechanism of gearbox

Country Status (1)

Country Link
CN (1) CN114791040A (en)

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