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Mechanical type automatic transmission gear selecting and shifting actuation mechanism for vehicle

A shifting actuator and automatic shifting technology, applied in the direction of mechanical equipment, transmission control, components with teeth, etc., can solve problems such as off-gear, skipping, high reverse efficiency, etc., achieve smooth torque, reduce machining requirements, the effect of high control precision

Active Publication Date: 2015-05-06
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to structural reasons, the transmission efficiency of the ball screw is very high, but at the same time it also has a high reverse efficiency. When the nut is subjected to an axial force, the screw of the ball screw will rotate, and the nut will move axially, that is The reverse transmission of the ball screw is prone to technical problems such as "out of gear, jumping out of gear" and so on

Method used

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  • Mechanical type automatic transmission gear selecting and shifting actuation mechanism for vehicle
  • Mechanical type automatic transmission gear selecting and shifting actuation mechanism for vehicle
  • Mechanical type automatic transmission gear selecting and shifting actuation mechanism for vehicle

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Embodiment Construction

[0031] The specific implementation of the technical solution of the present invention will be further introduced below in conjunction with the accompanying drawings of the description:

[0032] like figure 1 As shown, a gear selection and shifting actuator of a mechanical automatic transmission for a vehicle includes a brushless DC motor 1, a reverse drive bidirectional backstop, a ball screw nut 14, a ball screw screw 15, a push-pull rod 16, and a support frame 18 and baffle plate 19.

[0033] Wherein, the anti-transmission two-way backstop is composed of an outer ring 4, an annular shift fork 5, a planetary wheel 6, a spring 7 and a roller 8.

[0034] The bracket 18 is groove-shaped, the brushless DC motor 1 is fixed on the outside of one end of the bracket 18, the reverse drive bidirectional backstop is located inside the groove of the bracket 18, and the outer ring 4 is fixedly installed on the inner wall of the groove of the bracket 18. The ring shift fork 5 is sleeved ...

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Abstract

The invention discloses a mechanical type automatic transmission gear selecting and shifting actuation mechanism for a vehicle. The actuation mechanism controls shifting of gears of a mechanical type automatic transmission. A brushless direct current motor is used as a power source, and a ball screw is used as a transmission device. The rotation of the brushless direct current motor is controlled to drive a nut on the ball screw to move forwards or backwards; the nut is used for realizing gear selecting and shifting by a way that a push-pull rod pushes and pulls a gear selecting and shifting shaft of the transmission; the ball screw is high in transmission efficiency, and the force output by the mechanism and the response speed can be increased. The mechanical type automatic transmission gear selecting and shifting actuation mechanism further comprises a reverse transmission two-directional backstop consisting of an inner ring, an outer ring, an annular shifting fork, a planet wheel, a ball and a spring, so that the actuation mechanism has the functions of preventing the transmission from being off-gear and from getting trip stop.

Description

technical field [0001] The invention belongs to the field of transmissions for vehicles, and in particular relates to a gear selection and shifting actuator of a mechanical automatic transmission for vehicles, which is used to control the selection and conversion of vehicle gears. Background technique [0002] Existing automatic transmissions include hydraulic automatic transmission (AT), mechanical continuously variable transmission (CVT), electromechanical automatic transmission (AMT), and dual clutch automatic transmission (Dual Clutch Transmission--DCT). A car equipped with an automatic transmission can automatically change the speed and torque according to the running conditions of the car. The transmission and the engine are well matched, and there is no frustration of shifting when driving, and the driving comfort is very good. However, automatic transmissions are less efficient and more expensive to maintain than traditional manual transmissions. [0003] The mechan...

Claims

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Application Information

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IPC IPC(8): F16H61/18F16H61/22F16H61/32F16H61/36
CPCF16H61/18F16H61/22F16H61/32F16H61/36
Inventor 高炳钊岳汉奇陈虹包凯
Owner JILIN UNIV
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