Auxiliary drive mechanism for new energy vehicles

Abstract

The present invention discloses an auxiliary drive mechanism for a new energy vehicle, comprising a main motor, a reducer, and a differential, and further comprising an auxiliary motor and a multi-speed transmission, the multi-speed transmission comprising a housing, an auxiliary drive shaft, an intermediate shaft, and a connecting shaft, the auxiliary drive shaft is connected to the auxiliary motor, several single-stage reduction gear sets are provided between the auxiliary drive shaft and the intermediate shaft, and a clutch is provided on the auxiliary drive shaft, which allows only one single-stage reduction gear set to transmit power from the auxiliary motor or cut off power between the auxiliary drive shaft and the intermediate shaft, and a pair of transmission gear sets are provided between the intermediate shaft and the connecting shaft, one end of the connecting shaft is detachably connected to the main motor, and the other end of the connecting shaft is connected to the input shaft of the reducer, so that the vehicle can be driven by the auxiliary motor when decelerating and running, thereby saving power.

Description

[Technical Field]

[0001] The present invention relates to the technical field of automobile transmission, and more particularly to an auxiliary drive mechanism for new energy automobiles. [Background technology]

[0002] In many conventional new energy vehicles, the motor is connected to a reducer (transmission), which is then connected to the vehicle's differential to drive the vehicle's wheels (see Figure 2). However, with this drive system, when the vehicle is in a low-speed area (urban area), it travels at a low speed (20-30 km / h), which causes the motor to operate in a low-efficiency state. As a result, the motor's power consumption at low vehicle speeds is higher than when the vehicle is traveling at a constant speed. Summary of the Invention [Problem to be solved by the invention]

[0003] SUMMARY OF THE INVENTION In response to the deficiencies of the prior art, the present invention provides an auxiliary drive mechanism for new energy vehicles, which adds an auxiliary drive to the existing drive structure, thereby saving power consumption when the vehicle is running at low speeds. [Means for solving the problem]

[0004] To achieve the above object, the present invention provides the following technical solution: an auxiliary drive mechanism for a new energy vehicle, comprising a main motor, a reducer, and a differential, and further comprising an auxiliary motor and a multi-speed transmission, the multi-speed transmission comprising a housing, an auxiliary drive shaft, an intermediate shaft, and a connecting shaft, the auxiliary drive shaft is connected to the auxiliary motor, several single-stage reduction gear sets are provided between the auxiliary drive shaft and the intermediate shaft, the auxiliary drive shaft is provided with a clutch, and the clutch allows only one single-stage reduction gear set to transmit power from the auxiliary motor or cut off power between the auxiliary drive shaft and the intermediate shaft, and a pair of transmission gear sets are provided between the intermediate shaft and the connecting shaft, one end of the connecting shaft is detachably connected to the main motor, and the other end of the connecting shaft is connected to the input shaft of the reducer.

[0005] Furthermore, a same-stage transmission gear set is provided between the auxiliary drive shaft and the intermediate shaft, and the transmission gear set includes two same-stage gears, which are connected to the auxiliary drive shaft and the intermediate shaft, respectively.

[0006] Furthermore, the single-stage reduction gear set includes a first gear located on the auxiliary drive shaft and a second gear located on the intermediate shaft, where the first gear is smaller than the second gear.

[0007] Furthermore, the transmission gear set is a two-stage reduction gear set, and the two-stage reduction gear set includes a third gear located behind the intermediate shaft and a fourth gear located on the connecting shaft. [Effects of the Invention]

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: when the vehicle is running at a low speed, the main motor is stopped, the auxiliary motor rotates the auxiliary drive shaft, and the clutch controls a set of single-stage reduction gears to transmit power to the intermediate shaft, then a two-stage reduction gear between the intermediate shaft and the connecting shaft transmits power to the reducer, and the reducer transmits power to the differential and wheels; in this way, when the vehicle is running at a low speed, it is driven only by the auxiliary motor with lower power, and can meet the power required for running at a low speed after multi-stage reduction, thereby saving power consumption when the vehicle is running at a low speed. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a structural schematic diagram of the auxiliary drive mechanism of the new energy vehicle of the present invention; [Figure 2] FIG. 1 is a structural schematic diagram of a drive structure in the prior art. DETAILED DESCRIPTION OF THE INVENTION

[0010] In the present invention, the orientations or positional relationships indicated by directional terms, such as terms such as "center," "lateral (X)," "longitudinal (Y)," "vertical (Z)," "length," "width," "thickness," "up," "down," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," etc., are orientations or positional relationships based on the drawings, and are intended merely for the convenience and simplification of the description of the present invention. They do not indicate or imply that the devices or elements shown must have a specific orientation, be configured, or be operated in a specific orientation, and therefore should not be understood as limiting the specific protection scope of the present invention.

[0011] Furthermore, the terms "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying relative importance or the number of technical features shown, whereby the features qualifying "first" and "second" may explicitly or implicitly include one or more of the features, and in the description of this invention, unless otherwise expressly and specifically limited, "plurality" and "several" mean two or more than two.

[0012] The present invention will be further explained with reference to FIGS.

[0013] The auxiliary drive mechanism of a new energy vehicle includes a main motor (1), a reducer (2), and a differential (3), and further includes an auxiliary motor (4) and a multi-speed transmission. The multi-speed transmission includes a housing (5), an auxiliary drive shaft (6), an intermediate shaft (7), and a connecting shaft (8). The auxiliary drive shaft (6) is connected to the auxiliary motor (4). Several single-stage reduction gear sets (9) are provided between the auxiliary drive shaft (6) and the intermediate shaft (7). The auxiliary drive shaft (6) is provided with a clutch (10). The clutch (10) allows only one single-stage reduction gear set (9) to transmit power from the auxiliary motor (4) or cut off power between the auxiliary drive shaft (6) and the intermediate shaft (7). A pair of transmission gear sets are provided between the intermediate shaft (7) and the connecting shaft (8). One end of the connecting shaft (8) is separably connected to the main motor (1), and the other end of the connecting shaft (8) is connected to the input shaft of the reducer (2).

[0014] In this embodiment, preferably, when the auxiliary drive motor is operating, the connecting shaft 8 is separated from the main motor 1 to avoid power being transmitted to the main motor 1 in the reverse direction.

[0015] As shown in FIG. 1, in this embodiment, a same-stage transmission gear set 11 is preferably provided between the auxiliary drive shaft 6 and the intermediate shaft 7, and the transmission gear set includes two same-stage gears, which are connected to the auxiliary drive shaft 6 and the intermediate shaft 7, respectively.

[0016] As shown in FIG. 1, in this embodiment, the single-stage reduction gear set 9 preferably includes a first gear located on the auxiliary drive shaft 6 and a second gear located on the intermediate shaft, and the first gear is smaller than the second gear.

[0017] As shown in FIG. 1 , in this embodiment, the transmission gear set is preferably a two-stage reduction gear set 12, which includes a third gear located behind the intermediate shaft 7 and a fourth gear located on the connecting shaft 8.

[0018] As shown in FIG. 1, when the vehicle is traveling at a low speed, the main motor 1 is stopped, the auxiliary motor 4 rotates the auxiliary drive shaft 6, and the clutch 10 controls a single-stage reduction gear set 9 to transmit power to the intermediate shaft 7. Then, a two-stage reduction gear between the intermediate shaft 7 and the connecting shaft 8 transmits the power to the reducer 2, which then transmits the power to the differential 3 and the wheels. In this way, when the vehicle is traveling at a low speed, only the auxiliary motor 4, which has a lower power, is used for driving, and after multiple reduction stages, the power required for the vehicle's low speed traveling can be met, thereby saving power consumption when the vehicle is traveling at a low speed.

[0019] In this embodiment, the effect of saving power is preferably more pronounced in high-power vehicles such as sports cars that have a large excess driving force.

[0020] In this embodiment, preferably, the auxiliary drive mechanism can be equipped with the auxiliary motor 4 and the multi-speed transmission without modifying the existing drive mechanism.

[0021] Improvement status chart after installing the auxiliary drive unit JPEG2026502316000002.jpg21123

[0022] Take a two-speed transmission as an example. JPEG2026502316000003.jpg33122

[0023] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions that fall within the concept of the present invention are within the protection scope of the present invention. It should be noted that those skilled in the art can make some improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should be considered as within the protection scope of the present invention. [Explanation of symbols]

[0024] Main motor 1, reducer 2, differential 3, auxiliary motor 4, housing 5, auxiliary drive shaft 6, intermediate shaft 7, connecting shaft 8, single-stage reduction gear set 9, clutch 10, single-stage transmission gear set 11, and double-stage reduction gear set 12.

Claims

1. an auxiliary drive mechanism for a new energy vehicle, the auxiliary drive mechanism comprising: a main motor, a reducer, and a differential; and further comprising: an auxiliary motor and a multi-speed transmission; the multi-speed transmission comprising: a housing, an auxiliary drive shaft, an intermediate shaft, and a connecting shaft; the auxiliary drive shaft is connected to the auxiliary motor; several single-stage reduction gear sets are provided between the auxiliary drive shaft and the intermediate shaft; the auxiliary drive shaft is provided with a clutch, and the clutch allows only one single-stage reduction gear set to transmit power from the auxiliary motor or cut off power between the auxiliary drive shaft and the intermediate shaft; and a pair of transmission gear sets are provided between the intermediate shaft and the connecting shaft, one end of the connecting shaft is detachably connected to the main motor, and the other end of the connecting shaft is connected to the input shaft of the reducer.

2. 2. The auxiliary drive mechanism of a new energy vehicle according to claim 1, wherein a same-stage transmission gear set is provided between the auxiliary drive shaft and the intermediate shaft, the transmission gear set includes two same-stage gears, and the two same-stage gears are respectively connected to the auxiliary drive shaft and the intermediate shaft.

3. 3. The auxiliary drive mechanism of a new energy vehicle as claimed in claim 2, wherein the single-stage reduction gear set comprises a first gear located on the auxiliary drive shaft and a second gear located on the intermediate shaft, and the first gear is smaller than the second gear.

4. 4. The auxiliary drive mechanism of a new energy vehicle as claimed in claim 3, wherein the transmission gear set is a two-stage reduction gear set, and the two-stage reduction gear set includes a third gear located behind the intermediate shaft and a fourth gear located on the connecting shaft.

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