Longitudinal 5-speed automatic gearbox for commercial vehicle
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A technology for automatic transmission and commercial vehicles, applied in the direction of vehicle transmission, transmission components, transmission devices, etc., can solve the problems of high cost, complex process or mold, etc., to improve torque density, simplify process, and good adaptability Effect
Inactive Publication Date: 2017-12-12
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
The planetary mechanism, clutch / brake, thrust bearing, etc. of this type of automatic transmission require complex processes or molds, and the cost is relatively high
Method used
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Embodiment 1
[0035] Embodiment 1: see attached figure 1 , a vertical five-speed automatic transmission for commercial vehicles, which includes: five wet clutches for gear shifting, and one synchronizer 17, which adopts a parallel shaft structure;
[0036] The parallel shaft structure includes: shaft A11, shaft B15 on both sides, and shaft C25 in the middle;
[0037] The five wet clutches for shifting are: the first clutch 8, the second clutch 19, the third clutch 7, the fourth clutch 22, and the fifth clutch 20;
[0038] The power from the engine is input through the input shaft 1 and transmitted to the shaft C25 through the torque converter 3 with the lock-up clutch 2; when the lock-up clutch 2 is closed, the power of the engine is directly transmitted to the shaft without the torque converter 3 Shaft C25; when the lock-up clutch 2 is disengaged, the power of the engine is transmitted to the shaft C25 after passing through the torque converter 3;
[0039] The shaft C25 is fixedly connec...
Embodiment 2
[0052] Embodiment 2, see attached Figure 8 , a vertical five-speed automatic transmission for commercial vehicles, which includes: 5 wet clutches for gear shifting, and 1 synchronizer 48, which adopts a parallel shaft structure;
[0053] The parallel shaft structure includes: shaft A34, shaft B49 on both sides, and shaft C30 in the middle;
[0054] The five wet clutches for shifting are respectively: the first clutch 38, the second clutch 46, the third clutch 39, the fourth clutch 50, and the fifth clutch 47;
[0055] The power from the engine is input through the input shaft 1 and transmitted to the shaft C30 through the torque converter 3 with the lock-up clutch 2; when the lock-up clutch 2 is closed, the power of the engine is directly transmitted to the shaft without the torque converter 3 Shaft C30; when the lock-up clutch 2 is disengaged, the power of the engine is transmitted to the shaft C30 after passing through the torque converter 3;
[0056] The shaft C30 is fix...
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Abstract
The invention belongs to the technical field of power transmission, and particularly relates to an automatic gearbox for a commercial vehicle. According to the transmission scheme of the automatic gearbox for the commercial vehicle, the automatic gearbox is composed of a hydraulic pressure torque converter and a fixed-axis gear transmission mechanism, and the hydraulic pressure torque converter is a three-element hydraulic pressure torque converter provided with a lockup clutch and is used for starting, gear shifting and absorbing vibration coming from an engine. The fixed-axis gear transmission mechanism adopts a parallel shaft structure and is provided with five wet clutches for gear shifting and a synchronizer, and thus, five forward gears and a reverse gear are arranged. According to the scheme, the technology is simple, gear bodies, bearings, the clutches and a brake are all conventionally designed, the cost of dies is reduced, the technology is simplified, and cost control is facilitated. The transmission ratio of all the gears is flexibly set, the order ratio of all the gears can be distributed flexibly, oil consumption at the high-speed or middle-low speed working condition and the gear shifting comfort are both considered, and the automatic gearbox is suitable for lightweight vehicles under complex working conditions.
Description
technical field [0001] The invention belongs to the technical field of power transmission, in particular to an automatic gearbox for commercial vehicles. Background technique [0002] The automatic transmission with hydraulic torque converter has the characteristics of smooth and comfortable start, and easy operation by the driver, and is more suitable for urban or off-road conditions. Automatic transmissions with hydraulic torque converters usually use a multi-speed planetary transmission mechanism. For example, a 6-speed planetary transmission mechanism is realized by 3 planetary rows and 5 clutch / brake operating elements, while a 7-speed and 8-speed planetary transmission mechanism requires More planet rows and control elements. The planetary mechanism, clutch / brake, thrust bearing, etc. of this type of automatic transmission require complex processes or molds, and the cost is relatively high. Contents of the invention [0003] The purpose of the present invention is ...
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Application Information
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