Planetary transmission based on magneto-rheological gear shifting

A planetary transmission and magneto-rheological fluid technology, applied in the field of vehicle transmission, can solve the problems of increasing the burden of lubrication and heat dissipation, increasing the weight and volume of the transmission device, and the large torque of the belt.

Pending Publication Date: 2021-09-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The application of wet multi-disc clutches in high power density transmission systems has more prominent problems. At high speeds, it will generate a large belt displacement torque, which restricts the improvement of transmission efficiency and increases the burden of lubrication and heat dissipation. In the process of gear shifting, the hydraulic control system needs to provide a large hydraulic thrust to engage, so it is necessary to equip the transmission system with a special oil tank, hydraulic pump and pipeline, etc., which greatly increases the weight and volume of the transmission device, and is especially unsuitable for use. in electric vehicles

Method used

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  • Planetary transmission based on magneto-rheological gear shifting
  • Planetary transmission based on magneto-rheological gear shifting

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Embodiment Construction

[0036] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0037] The embodiment of the present invention provides a planetary transmission based on magnetic current shift gear, the internal structure of the planetary transmission can be referred to figure 1 , the assembly structure of the planetary transmission and drive motor 1 can refer to figure 2 , the planetary transmission includes a case, a sun gear shaft 3, a first magneto-rheological fluid 11, a ring gear output sleeve 12, a locking sleeve 15, an output gear sleeve 16, a planet carrier output sleeve 20, a first coil 25, a second magnetic Rheological fluid 21, second coil 22, planetary gear 24, planetary gear shaft 26, ring gear 27 and planet carrier 29;

[0038] The sun gear shaft 3 is installed in the box, and one end is connected to the output shaft of the driving motor 1 outside the box; the sun gear shaft 3 is arranged in the horizontal direction, ...

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Abstract

The invention discloses a planetary transmission based on magneto-rheological gear shifting. A planetary gear of the planetary transmission based on magneto-rheological gear shifting is meshed with a sun gear shaft and a gear ring. A planet carrier is fixedly connected with a planet wheel shaft; a first coil is embedded in the inner wall of the box body, and the space between the first coil and the gear ring is filled with first magneto-rheological fluid; a second coil is mounted between a gear ring output sleeve and a box body, and a second magneto-rheological fluid is filled between a planet carrier output sleeve and the gear ring output sleeve which are on the inner peripheral side of the second coil; a locking sleeve and an output gear sleeve are in key connection with the inner peripheral side of the planet carrier output sleeve; the locking sleeve and the sun wheel shaft are coaxially arranged; and the output gear sleeve is fixedly connected to the peripheral side of one end of the locking sleeve, and one end of the output gear sleeve extends out of the box body. According to the planetary transmission based on magneto-rheological gear shifting, stepless adjustment of output torque can be achieved, a friction pair and a hydraulic control mechanism are not needed, the weight and the size of the transmission can be effectively reduced, the transmission efficiency is improved, abrasion and impact of parts in the gear shifting process are avoided, the reliability is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of vehicle transmission, in particular to a planetary transmission based on magnetic current shift gears. Background technique [0002] At present, high-power electric drive tracked vehicles usually use a two-speed planetary transmission in the transmission system. The purpose is to expand the torque and speed range of the drive motor, so that the vehicle can obtain better dynamic performance, such as increasing the gradeability, acceleration and maximum speed. In order to realize the integrated layout and reduce the size of the transmission device, a planetary transmission with compact structure, high transmission power, and coaxial input and output is generally used. The planetary transmission shift mechanism used in the prior art mostly adopts wet multi-disc clutches. [0003] The wet multi-plate clutch mainly transmits power by friction torque. The hydraulic oil circuit of the clutch is divided into a ...

Claims

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Application Information

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IPC IPC(8): F16H47/00F16H55/06F16H57/02F16H57/023F16H57/028F16H57/029F16H57/031F16H57/08F16D37/00
CPCF16H47/00F16H55/06F16H57/02F16H57/023F16H57/082F16H57/028F16H57/029F16H57/031F16D37/008F16H2057/02034F16H2057/085
Inventor 马彪王赫于亮陈漫张斌
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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