Automatic speed changing hydraulic gear shifting drive device
A technology of driving device and automatic speed change, which is applied in the direction of transmission device control, components with teeth, belt/chain/gear, etc. It can solve the problem that the random change of the hanging position error cannot be eliminated, so as to ensure reliable operation and reliability The effect of ensuring no single-sided wear and oil leakage
Inactive Publication Date: 2020-03-10
欧阳抗美
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Problems solved by technology
Defects that cannot be eliminated due to random changes in the center position error
Method used
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[0011] specific implementation plan
[0012] exist figure 1 middle, figure 2 middle:
[0013] In the present invention, a guide hole is drilled on the shift rack 9 equipped with the shift dial shaft 4, and the shift shift guide shaft 8 is installed, and the shift shift guide shaft 8 is installed on the shift oil cylinder body 1. There is a gear shifting guide shaft 8 to bear the changing radial component force; at the same time, the shifting rack 9 and the shifting cylinder block 6 are respectively arranged with two rollers 11 at both ends of the oil cylinder 6 and the shifting block 6. The concave groove connection of frame 9 isolates and removes the effect of lever radial component force on shift oil cylinder left piston 7. Effectively remove the radial component force on the gearshift rack 9 and act on the left piston 7 of the gearshift cylinder through the gearshift cylinder 6, causing the inner wall of the oil cylinder to be worn on one side, thereby ensuring the reli...
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The invention provides an automatic speed changing hydraulic gear shifting drive device for an electro-hydraulic control mechanical automatic transmission of a commercial vehicle, especially a city bus. The automatic speed changing hydraulic gear shifting drive device can effectively meet the reliability requirements of a mechanical gearbox for automatic gear shifting in compact space. The automatic gear shifting drive device is suitable for a variety of market mature intermediate and large torque gearboxes. At present, a gear shifting drive device for an electro-hydraulic control mechanical automatic transmission of the city bus is used, due to position changes in the gear selection process, a gear shifting driving shaft on a gear shifting oil cylinder driving block is of overall rigid connection, under the action of counter-acting force of gear shifting of a gear shifting fork, amplified lever radial force is formed as a force bearing point on the gear shifting driving shaft is far,the force bearing point changes frequently, and the lever radial external force directly acting on a gear shafting oil cylinder piston is unstable and too large. It is difficult to ensure the reliability of the long-term operation in the high-intensity city bus environment, and oil cylinder single side wear and oil leakage are caused.
Description
technical field [0001] The invention relates to an automatic variable speed hydraulic shifting driving device of a commercial vehicle, especially a city bus electrohydraulic control mechanical automatic transmission. The invention can effectively meet the reliable requirements of automatic shifting of mechanical gearboxes in a compact space, and the invention is an automatic shifting drive device suitable for various medium and high torque gearboxes with mature markets. Background technique [0002] At present, the gearshift driving device used in the electro-hydraulic control mechanical automatic transmission of city buses, due to the position change during the gear selection process, the gearshift lever on the gearshift cylinder is hard-connected as a whole, and is affected by the reaction force of the gearshift fork. The effect of this force is due to the fact that the force point on the shifting fast shaft is far away to form a lever to amplify the radial force, and the ...
Claims
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IPC IPC(8): F16H61/30
CPCF16H61/30
Inventor 欧阳抗美
Owner 欧阳抗美