CN212564254U - Transmission for electric automobile - Google Patents

Abstract

The patent provides a transmission for an electric automobile, which adopts a two-gear transmission; the 2-gear transmission can enable the electric drive assembly to be in a high-efficiency area for a long time and has better dynamic property; secondly, the total transmission ratio of the transmission is obviously improved through the 4-shaft design, and the size of a motor and the cost of an electric drive assembly are obviously reduced; finally, the synchronizer is adopted for shifting, so that the characteristic of small rotational inertia of the motor and easiness in speed regulation can be fully utilized, the shifting time is shortened, and the comfort level is improved.

Description

Transmission for electric automobile

Technical Field

The utility model discloses the automobile manufacturing field, concretely relates to a derailleur for electric automobile.

Background

The existing automobile speed change technical scheme mainly comprises three schemes, wherein the first scheme is a single-speed-ratio speed reducer, the second scheme is a three-shaft design and is used for shifting gears through a synchronizer, and the third scheme is a three-shaft design and is used for shifting gears through a clutch; in the prior art, the first scheme cannot enable the electric drive assembly to be in a high-efficiency area for a long time, the efficiency is low, the speed ratio cannot be adjusted, the power performance of the electric drive assembly is affected, the total transmission ratio of the second scheme can only reach about 11, the large transmission ratio cannot be realized, the motor is light in weight, the assembly cost is reduced and limited, and the third scheme adopts two sets of clutches except the defects same as the first scheme, so that the cost is obviously increased, the structure is more complex, and the advantages of small rotational inertia and easiness in speed regulation of the motor are not fully utilized.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a 2-gear transmission which can enable an electric drive assembly to be in a high-efficiency area for a long time and has better dynamic property; secondly, the total transmission ratio of the transmission is obviously improved through the 4-shaft design, and the size of a motor and the cost of an electric drive assembly are obviously reduced; finally, the synchronizer is adopted for shifting, so that the characteristic of small rotational inertia of the motor and easiness in speed regulation can be fully utilized, the shifting time is shortened, and the comfort level is improved.

The utility model comprises the following contents:

a transmission for an electric automobile adopts a two-gear transmission.

Preferably, the two-gear transmission in the transmission for the electric automobile adopts a four-shaft design; the method comprises the following steps: the device comprises a motor, an input shaft, a first gear set, a second gear set, a third gear set, a synchronizer, a middle first shaft, a middle second shaft, an output shaft and a differential mechanism;

the motor is connected with an input shaft, the input shaft is provided with a first gear set, and the first gear set is connected with a middle shaft;

a second gear set and/or a third gear set are/is arranged between the first middle shaft and the second middle shaft; the middle two shafts are connected with an output shaft through a gear set IV, and a differential is arranged on the output shaft;

the synchronizer is arranged on the middle shaft.

Preferably, the speed changing method adopted by the speed changer for the electric automobile is as follows: the motor transmits power to the input shaft of the transmission, the power is transmitted to the middle shaft through the first gear set, then is transmitted to the middle second shaft through the second gear set, or is transmitted to the middle second shaft through the third gear set by shifting gears, and finally is transmitted to the output shaft through the fourth gear set, and the differential mechanism on the output shaft transmits the power out;

the speed change method adopts a synchronizer to shift gears, a gear shift mechanism is arranged at a middle shaft, and a gear shift execution mechanism is driven by a motor to shift gears.

The novel point of the utility model is that the transmission ratio is obviously improved through the four-axis design, and the size of the motor and the assembly cost are obviously reduced; the synchronizer is adopted for shifting, the advantage that the motor can quickly adjust speed is fully utilized, the small shifting time and the good shifting comfort degree are realized, and the cost is obviously reduced relative to the clutch shifting cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic view of a structure of a transmission shaft according to the present invention.

Description of reference numerals: 1. a motor; 2. an input shaft; 3. a first gear set; 4. a second gear set; 5. a synchronizer; 6. A middle shaft; 7. a third gear set; 8. a middle two-axis; 9. an output shaft; 10. a differential gear.

Detailed Description

The present invention will be described in further detail with reference to the following examples, which are illustrative of the present invention and are not intended to limit the present invention.

Example (b):

as shown in fig. 1, the present embodiment provides a transmission device, which includes a motor 1, an input shaft 2, a first gear set 3, a second gear set 4, a synchronizer 5, a middle shaft 6, a third gear set 7, a middle shaft 8, an output shaft 9, and a differential 10, and adopts a four-shaft design, wherein the motor transmits power to the input shaft of the transmission, the power is transmitted to the middle shaft through the first gear set, then transmitted to the middle shaft through the second gear set, or transmitted to the middle shaft through the third gear set by shifting gears, and finally transmitted to the output shaft through the fourth gear set, and the differential on the output shaft transmits the power. This scheme adopts the synchronous ware to shift, and gearshift arranges that it is one at the jackshaft, shifts by motor drive actuating mechanism that shifts.

In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims (2)

1. A transmission for an electric vehicle, characterized by: the transmission adopts a two-gear transmission;

the two-gear transmission adopts a four-shaft design; the method comprises the following steps: the device comprises a motor, an input shaft, a first gear set, a second gear set, a third gear set, a synchronizer, a middle first shaft, a middle second shaft, an output shaft and a differential mechanism;

the motor is connected with an input shaft, the input shaft is provided with a first gear set, and the first gear set is connected with a middle shaft;

a second gear set and/or a third gear set are/is arranged between the first middle shaft and the second middle shaft; the middle two shafts are connected with an output shaft through a gear set IV, and a differential is arranged on the output shaft;

the synchronizer is arranged on the middle shaft.

2. The transmission for electric vehicles according to claim 1, characterized in that: the speed changing method of the speed changer comprises the following steps: the motor transmits power to the input shaft of the transmission, the power is transmitted to the middle shaft through the first gear set, then is transmitted to the middle second shaft through the second gear set, or is transmitted to the middle second shaft through the third gear set by shifting gears, and finally is transmitted to the output shaft through the fourth gear set, and the differential mechanism on the output shaft transmits the power out;

the speed change method adopts a synchronizer to shift gears, a gear shift mechanism is arranged at a middle shaft, and a gear shift execution mechanism is driven by a motor to shift gears.

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