One-actuator two-gear speed changer for electric vehicle

Abstract

The invention relates to the field of electric vehicle speed changer, and provides a one-actuator two-gear speed changer for an electric vehicle in order to solve the technical problems that electricvehicle speed changers are complex in structure and high in manufacturing cost and control requirement. The one-actuator two-gear speed changer for the electric vehicle comprises a power input shaft,a power output shaft, a planet wheel system and a gear shifting mechanism; the planet wheel system is composed of a sun wheel, a planet wheel, a planet frame and an inner gear ring; the gear shiftingmechanism comprises a first actuating element, a second actuating element and an actuator; and the actuator is used for conducting interlocking control over first actuating element combination and second actuating element separation. Through the technical scheme, through one actuator, interlocking control over the first actuating element and the second actuating element can be conducted, gear shifting is achieved, accordingly, the overall structure of the speed changer is simplified and compact, the gear shifting time is easy to stably control, and especially, the problem that impact of a gearshifting actuating mechanism fails due to false operation of multiple brakes during gear shifting can be effectively solved.

Description

technical field

[0001] The invention relates to the field of transmissions for electric vehicles, in particular to a single-actuator type two-speed transmission for electric vehicles. Background technique

[0002] With the development of electric vehicles, the research and development of new transmissions with few gears has become a hot spot. The gear shifting of the existing transmission with few gears needs to be realized by controlling two actuators at the same time, wherein each actuator is used to control a transmission member in the transmission. For example, in the prior patent with the patent number CN201210472213.5, a second-speed transmission for electric vehicles is disclosed. The actuator for realizing the shifting process is an electromagnetic force actuator, and the electromagnetic brake B1 and the electromagnetic clutch C1 need to be controlled separately. The working state realizes gear shifting; in the previous patent with the patent number CN201710651749.6...

Examples

Embodiment Construction

[0047] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0048] see Figure 1 to Figure 5 , the present embodiment provides a single-actuator type two-speed transmission for an electric vehicle. The single-actuator type second-speed transmission for the electric vehicle includes:

[0049] The power input shaft 30, the power output shaft 40, the planetary gear train 20 and the shift mechanism 10; wherein, the power input shaft 30 and the power output shaft 40 are respectively connected with the transmission housing 1 through supporting bearings, and the power input shaft 30 It is used to connect with the output shaft of the drive motor 50 to transmit the power of the drive motor 50 to the transmission. The housing 1 of the transmission is composed of a front housing 1-1 and a rear housing ...

technical field

[0001] The invention relates to the field of transmissions for electric vehicles, in particular to a single-actuator type two-speed transmission for electric vehicles. Background technique

[0002] With the development of electric vehicles, the research and development of new transmissions with few gears has become a hot spot. The gear shifting of the existing transmission with few gears needs to be realized by controlling two actuators at the same time, wherein each actuator is used to control a transmission member in the transmission. For example, in the prior patent with the patent number CN201210472213.5, a second-speed transmission for electric vehicles is disclosed. The actuator for realizing the shifting process is an electromagnetic force actuator, and the electromagnetic brake B1 and the electromagnetic clutch C1 need to be controlled separately. The working state realizes gear shifting; in the previous patent with the patent number CN201710651749.6...

Examples

Embodiment Construction

[0047] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0048] see Figure 1 to Figure 5 , the present embodiment provides a single-actuator type two-speed transmission for an electric vehicle. The single-actuator type second-speed transmission for the electric vehicle includes:

[0049] The power input shaft 30, the power output shaft 40, the planetary gear train 20 and the shift mechanism 10; wherein, the power input shaft 30 and the power output shaft 40 are respectively connected with the transmission housing 1 through supporting bearings, and the power input shaft 30 It is used to connect with the output shaft of the drive motor 50 to transmit the power of the drive motor 50 to the transmission. The housing 1 of the transmission is composed of a front housing 1-1 and a rear housing ...

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