Shifting fork gear shifting method, gearbox, new energy vehicle power assembly and vehicle

A technology of shifting fork and gearbox, applied in the direction of transmission, gear transmission, transmission control, etc., can solve the problems of high noise and large shifting shock, achieve small shifting shock and reduce shifting shock , The effect of reducing the hidden danger of early damage

Inactive Publication Date: 2020-09-01
重庆永发工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The first purpose of the present invention is to provide a shifting fork control method for the existing two-speed planetary gearbox for electric vehicles, which has large shifting impact and high noise. This method uses the stroke to automatically adjust the cyli

Method used

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  • Shifting fork gear shifting method, gearbox, new energy vehicle power assembly and vehicle
  • Shifting fork gear shifting method, gearbox, new energy vehicle power assembly and vehicle
  • Shifting fork gear shifting method, gearbox, new energy vehicle power assembly and vehicle

Examples

Experimental program
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Effect test

Example Embodiment

[0031] Embodiment 1, a shifting control method for shifting forks, used in a two-speed transmission system for shifting shifting forks, controlling the movement of the shifting fork shifting mechanism through a power output signal to realize automatic switching between two gears; The shifting fork shift mechanism is driven by a three-position cylinder; the power output signal is composed of a torque signal and a speed signal; the gear shift is completed in the following order; when one signal appears, wait for the other signal; when both signals are both When it appears, the three-position cylinder first drives the shift fork to move to perform gear shifting, and the intermediate position of the three-position cylinder is used to stop the shift fork or reduce the shifting speed of the shift fork to form a shift buffer.

[0032] Among them, the fork shift mechanism also uses electromagnetic force to assist in gear shifting.

Example Embodiment

[0033] Example 2, see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 , A two-speed planetary automatic transmission, including a single-stage planetary transmission 100 and a shifting fork shifting mechanism 200, the shifting shifting mechanism 200 is connected with a shifting drive cylinder 300; the shifting drive cylinder 300 is composed of a three-position cylinder , The two extreme positions of the three-position cylinder correspond to the two gears of the gearbox respectively, and the middle position between the two extreme positions is used to form a shift buffer between shifting and shifting.

[0034] Wherein, the three-position cylinder includes a first piston 1 and a second piston 2. The first piston 1 is located in the first piston cavity and is coaxially fixedly connected to one end of the fork rod 3 of the fork shift mechanism. 3 constitutes the first piston rod; the second piston 2 is located in the second piston cavity, and one end of...

Example Embodiment

[0045] Example 3, see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 And combine Figure 7 , A power assembly, including an AC asynchronous motor 14 and a gearbox; the gearbox is composed of the two-speed planetary automatic gearbox of Embodiment 2; wherein the sun gear is integrally formed or fixedly connected to the motor shaft 14a of the AC asynchronous motor 14.

[0046] Among them, the AC asynchronous motor 14 has a dual-cooling structure, and its rotor body is made of cast copper. The cooling method is a combination of water cooling and oil cooling. The water cooling uses an external circulating cooling water method to cool the motor housing 14b. The oil cooling uses insulating oil 15 as a heat transfer medium to conduct heat conduction cooling on the rotor 14c and the stator 14d inside the motor. The insulating oil is filled in the inner cavity of the rotor and stator of the motor, and the oil level is lower than the horizontally arranged rotor axis lin...

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Abstract

The invention discloses a shifting fork gear shifting method, a gearbox, a new energy vehicle power assembly and a vehicle. The gear shifting method comprises the steps of controlling a three-positionair cylinder to drive a shifting fork gear shifting mechanism to move through a power output signal to achieve automatic switching between two gears; and forming buffering between gear disengaging and gear engaging by ingeniously using the middle position of the three-position air cylinder. The gearbox is of a single-stage planetary shifting fork gear shifting structure, a gear shifting driving air cylinder is the three-position air cylinder, and a magnetic push rod is further arranged to assist in gear engaging. The power assembly is provided with the gearbox, a double-cooling copper rotor alternating current asynchronous motor is adopted as a driving motor, and an insulating oil heat transfer cooling mode is adopted for oil cooling in double cooling to cool a rotor and a stator. The newenergy vehicle comprises the power assembly. The shifting fork gear shifting method, the gearbox, the new energy vehicle power assembly and the vehicle gear have the beneficial effects that gear shifting impact and noise are reduced through the gear shifting method, the gearbox provides guarantee for reducing gear shifting impact and noise, and the power assembly and the new energy vehicle have the same beneficial effects as the gearbox.

Description

technical field [0001] The invention relates to a vehicle gearbox shift control technology, in particular to a fork shift method, a gearbox, a new energy vehicle power assembly and a vehicle. Background technique [0002] As the international community pays more and more attention to energy security and environmental protection issues, countries have increasingly stringent requirements on vehicle emissions. Pure electric vehicles are conducive to reducing energy consumption and have become the development trend of the automotive industry today. The traditional speed change method of pure electric vehicles is to achieve high and low speed driving by adjusting the speed of the motor, but in this mode, when the motor runs at low speed, it generates a lot of heat, has a low conversion rate, and consumes a lot of energy. To this end, the gearbox is configured to shift gears to keep the motor running at high speed, reduce energy consumption, and improve energy utilization. Due t...

Claims

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Application Information

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IPC IPC(8): F16H63/32F16H61/40F16H63/34F16H61/02F16H61/04F16H61/18F16H3/44F16H57/023
CPCF16H3/44F16H57/023F16H61/0204F16H61/04F16H61/18F16H61/40F16H63/32F16H63/34
Inventor 刘东晓
Owner 重庆永发工业有限公司
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