Transmission device for planetary gear train multi-gear hybrid vehicle and transmission method therefor

Abstract

To provide a transmission device for a planetary gear train multi-gear hybrid vehicle which has many types of combinations of a clutch and a planetary gear train, is easily assembled, has few components to use, can realize a large change in a gear ratio, can realize more modes, is high in cost efficiency, is easy to use and easily becomes widespread.SOLUTION: An input end of an input shaft is connected to an engine, an output end of the input shaft is connected to a front-end motor through a first planetary gear train, and the input shaft is connected to an output shaft through a first clutch. The output shaft is connected to a third planetary gear train, the third planetary gear train is connected to a second clutch and a second planetary gear train, and the second clutch and the second planetary gear train are both connected to a third clutch. The second planetary gear train is connected to a rear-end motor. The stator of the front end motor, the stator of the rear end motor, the third clutch, the first planetary gear train and the third planetary gear train are all connected to a case.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to a power transmission device and a power transmission method for a planetary gear mechanism multi-stage gear hybrid vehicle, and belongs to the technical field of automobile parts. [Background technology]

[0002] Hybrid power is an important area of ​​electrification, and hybrid vehicle power transmission devices, which have a compact structure and relatively simple control, are becoming one of the important development directions in the new energy field.

[0003] However, in the power transmission devices of existing hybrid vehicles, the gradient range of the two-speed gear ratio is limited, and the range of achievable gear ratios is also limited, so that depending on the driving conditions, the needs of some vehicles for the gradient of the gear ratio and the range of the gear ratio cannot be met. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE DISCLOSURE In order to solve the problems existing in the background art, the present invention provides a power transmission device and a power transmission method for a planetary gear mechanism multi-stage gear hybrid vehicle. [Means for solving the problem]

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: A power transmission device for a planetary gear mechanism multi-stage gear hybrid vehicle, comprising an input shaft, a case, a front-end motor, a rear-end motor, an output shaft, a first clutch, a second clutch, a third clutch, a first planetary gear mechanism, a second planetary gear mechanism, and a third planetary gear mechanism, an input end of the input shaft is connected to an engine, an output end of the input shaft is connected to the front-end motor via the first planetary gear mechanism, and the input shaft is connected to an output shaft via the first clutch, and the output shaft is connected to the third planetary gear mechanism, and the third planetary gear mechanism is connected to the second clutch and the second planetary gear mechanism. the first planetary gear mechanism includes a first sun gear, a first planetary gear, a first planet carrier, and a first outer ring gear, the first planetary carrier is fixedly connected to the input shaft and the first clutch, and the first planetary gear mechanism is provided with a first planetary gear, a first sun gear, a first planetary gear, a first planet carrier, and a first outer ring gear, the first planetary gear mechanism being connected to the input shaft and the first clutch, the second clutch and the second planetary gear mechanism being connected to the third clutch, the second planetary gear mechanism being connected to the rear-end motor, the front-end motor stator, the rear-end motor stator, the third clutch, the first planetary gear mechanism, and the third planetary gear mechanism being connected to the case, the first planetary gear mechanism includes a first sun gear, a first planetary gear, a first planet carrier, and a first outer ring gear, the first planetary carrier is fixedly connected to the input shaft and the first clutch, and the first planetary gear a wheel, the first planetary gear meshingly connected with a first sun gear and a first outer ring gear, the first outer ring gear being fixedly installed on a case, the first sun gear being connected to a rotor of a front-end motor; the third planetary gear mechanism includes a third sun gear, a third planetary gear, a third planet carrier and a third outer ring gear, the third planet carrier being fixedly connected to an output shaft and a second clutch, and a third planetary gear is installed on the third planet carrier, the third planetary gear meshingly connected with a third sun gear and a third outer ring gear; The third outer ring gear is connected to a second planetary gear, the third sun gear is connected to a case, the second planetary gear mechanism includes a second sun gear, a second planetary gear, a second planet carrier and a second outer ring gear, the second planetary carrier is fixedly connected to the third outer ring gear and the second planetary gear is provided on the second planetary carrier, the second planetary gear is meshed with and connected to the second sun gear and the second outer ring gear, the second outer ring gear is connected to a second clutch and a third clutch, and the second sun gear is connected to a rotor of a rear-end motor.

[0006] A power transmission method for an EV gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, the method including: step S1 of deactivating the front end motor and the engine, disengaging the first clutch and the second clutch, engaging the third clutch, and activating the rear end motor; Step S2 of starting the rear end motor to rotate the second sun gear; Step S3 in which the second sun gear rotates and drives the second planetary gears; Step S4, in which the second planetary gear rotates and drives the second planetary carrier; Step S5, in which the second planetary carrier rotates and drives a third outer ring gear; Step S6, in which the third outer ring gear rotates and drives the third planetary gear; Step S7 in which the third planetary gear rotates and drives the third planetary carrier; Step S8 is included in which the third planetary carrier rotates and drives the output shaft to output power.

[0007] A power transmission method for an EV gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, the method including: step S1 of deactivating the front end motor and the engine, disengaging the first clutch and the third clutch, engaging the second clutch, and activating the rear end motor; Step S2 of starting the rear end motor to rotate the second sun gear; Step S3 in which the second sun gear rotates and drives the second planetary gears; Step S4, the second planetary gear drives the second planetary carrier and the second outer ring gear to rotate simultaneously; Step S5, in which the second planetary carrier rotationally drives the third outer ring gear, the third outer ring gear rotationally drives the third planetary gear, the third planetary gear rotationally drives the third planetary carrier, and at the same time, the second outer ring gear rotationally drives the third planetary carrier via a second clutch; Step S6 is included in which the third planetary carrier rotates and drives the output shaft to output power.

[0008] A power transmission method for a series one gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, the method comprising: step S1 of operating the front end motor, the rear end motor and the engine, disengaging the first clutch and the second clutch, and engaging the third clutch; Step S2 of starting the engine to rotate the input shaft; Step S3 in which the input shaft rotates and drives a first planetary carrier; Step S4 in which the first planetary carrier rotates and drives the first planetary gear; Step S5, in which the first planetary gear rotates and drives the first sun gear; Step S6, the first sun gear rotates and drives a rotor of a front-end motor, and stores energy in a battery; Step S7, in which the rear end motor receives energy from a battery and rotates the second sun gear; Step S8 in which the second sun gear rotates and drives the second planetary gears; Step S9 in which the second planetary gear rotates and drives the second planetary carrier; Step S10, in which the second planetary carrier rotates and drives a third outer ring gear; Step S11, in which the third outer ring gear rotates and drives the third planetary gear; Step S12 in which the third planetary gear rotates and drives the third planetary carrier; A step S13 is included in which the third planetary carrier rotates an output shaft.

[0009] A power transmission method for a series two-gear power transmission device of a planetary gear mechanism multi-gear hybrid vehicle according to the present invention, comprising: step S1 of operating the front end motor, the rear end motor and the engine, disengaging the first clutch and the third clutch, and engaging the second clutch; Step S2 of starting the engine to rotate the input shaft; Step S3 in which the input shaft rotates and drives a first planetary carrier; Step S4 in which the first planetary carrier rotates and drives the first planetary gear; Step S5, in which the first planetary gear rotates and drives the first sun gear; Step S6, the first sun gear rotates and drives a rotor of a front-end motor, and stores energy in a battery; Step S7, in which the rear end motor receives energy from a battery and rotates the second sun gear; Step S8 in which the second sun gear rotates and drives the second planetary gears; Step S9, in which the second planetary gear drives the second planetary carrier and the second outer ring gear to rotate simultaneously; Step S10, in which the second planetary carrier rotationally drives the third outer ring gear, the third outer ring gear rotationally drives the third planetary gear, the third planetary gear rotationally drives the third planetary carrier, and at the same time, the second outer ring gear rotationally drives the third planetary carrier via a second clutch; Step S11 is included in which the third planetary carrier rotates and drives the output shaft to output power.

[0010] A power transmission method for a parallel one gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, comprising: step S1 of operating the rear end motor and the engine, engaging the first clutch and the third clutch, disengaging the second clutch, and deactivating the front end motor; Step S2 of starting the rear end motor to rotate the second sun gear; Step S3 in which the second sun gear rotates and drives the second planetary gears; Step S4, in which the second planetary gear rotates and drives the second planetary carrier; Step S5, in which the second planetary carrier rotates and drives a third outer ring gear; Step S6, in which the third outer ring gear rotates and drives the third planetary gear; Step S7 in which the third planetary gear rotates and drives the third planetary carrier; Step S8 in which the engine transmits power to an input shaft; Step S9 in which the input shaft rotates and drives the third planetary carrier via the first clutch; Step S10 is included in which the third planetary carrier rotates and drives the output shaft to output power.

[0011] A power transmission method for a parallel two-gear stage power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, comprising: step S1 of operating the rear end motor and the engine, engaging the first clutch and the second clutch, and disengaging the third clutch to deactivate the front end motor; Step S2 of starting the rear end motor to rotate the second sun gear; Step S3 in which the second sun gear rotates and drives the second planetary gears; Step S4: the second planetary gear drives the second planetary carrier and the second outer ring gear to rotate simultaneously; Step S5, in which the second planetary carrier rotationally drives the third outer ring gear, the third outer ring gear rotationally drives the third planetary gear, the third planetary gear rotationally drives the third planetary carrier, and at the same time, the second outer ring gear rotationally drives the third planetary carrier via a second clutch; Step S6 in which the engine transmits power to an input shaft; Step S7 in which the input shaft rotates and drives the third planetary carrier via the first clutch; Step S8 is included in which the third planetary carrier rotates and drives the output shaft to output power.

[0012] A power transmission method for a direct gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, the method including: Step S1 of operating the engine, disengaging the first clutch, the second clutch, and the third clutch, and deactivating the front end motor and the rear end motor; Step S2 in which the engine transmits power to an input shaft; The method includes a step S3 in which the input shaft rotates and drives the output shaft via a first clutch to output power.

[0013] A power transmission method for a braking regeneration gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, comprising: step S1 of operating the rear end motor, engaging the third clutch, disengaging the first clutch and the second clutch, and deactivating the front end motor and the engine; Step S2 in which the output shaft rotates and drives a third planetary carrier; Step S3, in which the third planetary carrier rotates and drives a third outer ring gear; Step S4, in which the third outer ring gear rotates and drives the second planetary carrier; Step S5 in which the second planetary carrier rotates and drives the second planetary gear; Step S6, in which the second planetary gear rotates and drives the second sun gear; Step S7 includes causing the second sun gear to rotate and drive the rotor of the rear-end motor, and storing the energy in a battery.

[0014] A power transmission method for an idle power generation gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, the method including: step S1 of operating the front end motor and the engine, disengaging the first clutch, the second clutch, and the third clutch, and deactivating the rear end motor; Step S2 in which the engine transmits power to an input shaft; Step S3 in which the input shaft rotates and drives a first planetary carrier; Step S4 in which the first planetary carrier rotates and drives the first planetary gear; Step S5, in which the first planetary gear rotates and drives the first sun gear; Step S6 includes causing the first sun gear to rotate a rotor of a front-end motor and storing energy in a battery. Effect of the Invention

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention has the following features: compact structure, convenient control, low component cost and low processing difficulty, many types of combination of clutch and planetary gear mechanism, easy assembly, few parts, large gear ratio change, large gear ratio range, reasonable structure, easy assembly, more modes, cost performance, easy to use, easy to popularize. At the same time, the spatial interleaving of the motor, clutch and planetary gear mechanism can effectively improve the efficiency of the transmission device and optimize the responsiveness and smoothness. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a structural schematic diagram of the present invention. [Diagram 2] FIG. 2 is a structural schematic diagram of the EV1 gear stage of the present invention. [Diagram 3] FIG. 2 is a structural schematic diagram of the EV2 gear stage of the present invention. [Figure 4] FIG. 2 is a structural schematic diagram of one serial gear stage of the present invention. [Diagram 5] FIG. 2 is a structural schematic diagram of a series two-gear stage of the present invention. [Figure 6] FIG. 2 is a structural schematic diagram of one parallel gear stage of the present invention. [Figure 7] FIG. 2 is a schematic diagram showing the structure of two parallel gear stages of the present invention. [Figure 8] FIG. 2 is a structural schematic diagram of a direct gear stage of the present invention. [Figure 9] FIG. 2 is a structural schematic diagram of a regenerative braking gear stage according to the present invention; [Figure 10]FIG. 2 is a structural schematic diagram of an idle power generation gear stage of the present invention; [Figure 11] FIG. 2 is a diagram showing the principle of the lever of the present invention. [Figure 12] FIG. 2 is a structural schematic diagram of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, the technical solutions of the present invention will be clearly and completely described in the embodiments of the present invention together with the drawings. However, it is obvious that the described embodiments are only some of the embodiments of the present invention, and are not all of them. Based on the embodiments of the present invention, all other embodiments that can be obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.

[0018] A power transmission device for a planetary gear mechanism multi-gear hybrid vehicle includes an input shaft 51, a case 52, a front-end motor 53, a rear-end motor 54, an output shaft 55, a first clutch 41, a second clutch 42, a third clutch 43, a first planetary gear mechanism, a second planetary gear mechanism, and a third planetary gear mechanism, and the case 52, the front-end motor 53, the rear-end motor 54, the first clutch 41, the second clutch 42, the third clutch 43, the first planetary gear mechanism, the second planetary gear mechanism, and the third planetary gear mechanism are all set outside the input shaft 51 and the output shaft 55. The input end of the input shaft 51 is connected to an engine and becomes the input of the power transmission device, the output end of the input shaft 51 is connected to a front-end motor 53 via a first planetary gear mechanism, and the input shaft 51 is connected to an output shaft 55 via a first clutch 41, the output shaft 55 is connected to a third planetary gear mechanism, the third planetary gear mechanism is connected to a second clutch 42 and a second planetary gear mechanism, the second clutch 42 and the second planetary gear mechanism are both connected to the third clutch 43, the second planetary gear mechanism is connected to a rear-end motor 54, and the stator of the front-end motor 53, the stator of the rear-end motor 54, the third clutch 43, the first planetary gear mechanism and the third planetary gear mechanism are all connected to a case 52.

[0019] The first planetary gear mechanism includes a first sun gear 11, a first planetary gear 12, a first planetary carrier 13 and a first outer ring gear 14, the first planetary carrier 13 is fixedly connected to the input shaft 51 and the first clutch 41, and the first planetary gear 12 is provided on the first planetary carrier 13, the first planetary gear 12 is meshed with the first sun gear 11 and the first outer ring gear 14, the first outer ring gear 14 is fixedly installed on the case 52, and the first sun gear 11 is connected to the rotor of the front-end motor 53.

[0020] The third planetary gear mechanism includes a third sun gear 31, a third planetary gear 32, a third planetary carrier 33 and a third outer ring gear 34, the third planetary carrier 33 is fixedly connected to the output shaft 55 and the second clutch 42, and the third planetary gear 32 is installed on the third planetary carrier 33, the third planetary gear 32 is meshed with and connected to the third sun gear 31 and the third outer ring gear 34, the third outer ring gear 34 is connected to the second planetary gear, and the third sun gear 31 is connected to the case 52.

[0021] The second planetary gear mechanism includes a second sun gear 21, a second planetary gear 22, a second planet carrier 23 and a second outer ring gear 24, the second planetary carrier 23 is fixedly connected to the third outer ring gear 34, and the second planetary carrier 23 is provided with a second planetary gear 22, the second planetary gear 22 is meshed with the second sun gear 21 and the second outer ring gear 24, the second outer ring gear 24 is connected to a second clutch 42 and a third clutch 43, and the second sun gear 21 is connected to the rotor of the rear-end motor 54.

[0022] The present invention enables the selection of different speed ratios of the second planetary gear mechanism and the third planetary gear mechanism through different combinations of the first clutch 41, the second clutch 42 and the third clutch 43 and different operating states of the engine, the front-end motor 53 and the rear-end motor 54, thereby realizing EV1 gear stage, series 1 gear stage, EV2 gear stage, series 2 gear stage, parallel 1 gear stage, parallel 2 gear stage, direct gear stage, braking regeneration gear stage and idle power generation gear stage.

[0023] A power transmission method for an EV1 gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, comprising: Step S1 of deactivating the front end motor 53 and the engine, disengaging the first clutch 41 and the second clutch 42, engaging the third clutch 43, and activating the rear end motor 54; Step S2: starting the rear end motor 54 to rotate the second sun gear 21; Step S3 in which the second sun gear 21 rotates and drives the second planetary gears 22 since the third clutch 43 fixes the second outer ring gear 24; Step S4 in which the second planetary gear 22 rotates the second planetary carrier 23; Step S5 in which the second planetary carrier 23 rotates the third outer ring gear 34; Step S6 in which the third sun gear 31 is fixed to the case 52, so that the third outer ring gear 34 rotates and drives the third planetary gear 32; Step S7 in which the third planetary gear 32 rotates and drives the third planetary carrier 33; Step S8 is included in which the third planetary carrier 33 rotates and drives the output shaft 55 to output power.

[0024] A power transmission method for an EV2 gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, comprising: Step S1 in which the front-end motor 53 and the engine are deactivated, the first clutch 41 and the third clutch 43 are disengaged, the second clutch 42 is engaged, the rear-end motor 54 is activated, and the second planetary gear mechanism and the third planetary gear mechanism are driven at a fixed speed ratio; Step S2: starting the rear end motor 54 to rotate the second sun gear 21; Step S3 in which the second sun gear 21 rotates and drives the second planetary gears 22; Step S4, in which the second planetary gear 22 drives the second planetary carrier 23 and the second outer ring gear 24 to rotate simultaneously; Step S5 in which the second planetary carrier 23 rotationally drives the third outer ring gear 34, and since the third sun gear 31 is fixed to the case 52, the third outer ring gear 34 rotationally drives the third planetary gear 32, the third planetary gear 32 rotationally drives the third planetary carrier 33, and at the same time, the second outer ring gear 24 rotationally drives the third planetary carrier 33 via the second clutch 42; The method includes a step S6 in which the third planetary carrier 33 rotates and drives the output shaft 55 to output power.

[0025] A power transmission method for a series one gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, the method comprising: Step S1: putting the front end motor 53, the rear end motor 54 and the engine into an operating state, putting the first clutch 41 and the second clutch 42 into a disengaged state, and putting the third clutch 43 into an engaged state; Step S2 of starting the engine to rotate the input shaft 51; Step S3 in which the input shaft 51 rotates and drives the first planetary carrier 13; Step S4 in which the first planetary carrier 13 rotates the first planetary gear 12 since the first outer ring gear 14 is fixed to the case 52; Step S5 in which the first planetary gear 12 rotates the first sun gear 11; Step S6: the first sun gear 11 drives the rotor of the front-end motor 53 to rotate and store energy in a battery; Step S7 in which the rear end motor 54 receives energy from a battery and rotates the second sun gear 21; Step S8, in which the third clutch 43 fixes the second outer ring gear 24, so that the second sun gear 21 rotates and drives the second planetary gear 22; Step S9 in which the second planetary gear 22 rotates the second planetary carrier 23; Step S10 in which the second planetary carrier 23 rotates the third outer ring gear 34; Since the third sun gear 31 is fixed to the case 52, the third outer ring gear 34 rotates the third planetary gear 32 in step S11; Step S12 in which the third planetary gear 32 rotates the third planetary carrier 33; The third planetary carrier 33 includes a step S13 of rotating the output shaft 55 to output power.

[0026] A power transmission method for a series two-gear power transmission device of a planetary gear mechanism multi-gear hybrid vehicle according to the present invention, comprising: Step S1: putting the front end motor 53, the rear end motor 54 and the engine into an operating state, putting the first clutch 41 and the third clutch 43 into a disengaged state, and putting the second clutch 42 into an engaged state; Step S2 of starting the engine to rotate the input shaft 51; Step S3 in which the input shaft 51 rotates and drives the first planetary carrier 13; Step S4 in which the first planetary carrier 13 rotates the first planetary gear 12 since the first outer ring gear 14 is fixed to the case 52; Step S5 in which the first planetary gear 12 rotates the first sun gear 11; Step S6: the first sun gear 11 drives the rotor of the front-end motor 53 to rotate and store energy in a battery; Step S7 in which the rear end motor 54 receives energy from a battery and rotates the second sun gear 21; Step S8 in which the second sun gear 21 rotates and drives the second planetary gears 22; Step S9, in which the second planetary gear 22 drives the second planetary carrier 23 and the second outer ring gear 24 to rotate simultaneously; Step S10 in which the second planetary carrier 23 rotationally drives the third outer ring gear 34, and since the third sun gear 31 is fixed to the case 52, the third outer ring gear 34 rotationally drives the third planetary gear 32, the third planetary gear 32 rotationally drives the third planetary carrier 33, and at the same time, the second outer ring gear 24 rotationally drives the third planetary carrier 33 via the second clutch 42; The step S11 includes the third planetary carrier 33 rotatingly driving the output shaft 55 to output power.

[0027] A power transmission method for a parallel one gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, comprising: Step S1: putting the rear end motor 54 and the engine into an operating state, both of which serve as power outputs for the power transmission device, putting the first clutch 41 and the third clutch 43 into an engaged state, putting the second clutch 42 into a disengaged state, and putting the front end motor 53 into a non-operating state; Step S2: starting the rear end motor 54 to rotate the second sun gear 21; Step S3 in which the third clutch 43 fixes the second outer ring gear 24, so that the second sun gear 21 rotates and drives the second planetary gear 22; Step S4 in which the second planetary gear 22 rotates the second planetary carrier 23; Step S5 in which the second planetary carrier 23 rotates the third outer ring gear 34; Step S6 in which the third sun gear 31 is fixed to the case 52, so that the third outer ring gear 34 rotates and drives the third planetary gear 32; Step S7 in which the third planetary gear 32 rotates and drives the third planetary carrier 33; Step S8 in which the engine transmits power to the input shaft 51; Step S9 in which the input shaft 51 rotates and drives the third planetary carrier 33 via the first clutch 41; The step S10 includes the third planetary carrier 33 rotatingly driving the output shaft 55 to output power.

[0028] A power transmission method for a parallel two-gear stage power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, comprising: Step S1: putting the rear end motor 54 and the engine into an operating state, both of which serve as power outputs for the power transmission device, putting the first clutch 41 and the second clutch 42 into an engaged state, putting the third clutch 43 into a disengaged state, and putting the front end motor 53 into a non-operating state; Step S2: starting the rear end motor 54 to rotate the second sun gear 21; Step S3 in which the second sun gear 21 rotates and drives the second planetary gears 22; Step S4, in which the second planetary gear 22 drives the second planetary carrier 23 and the second outer ring gear 24 to rotate simultaneously; Step S5 in which the second planetary carrier 23 rotationally drives the third outer ring gear 34, and since the third sun gear 31 is fixed to the case 52, the third outer ring gear 34 rotationally drives the third planetary gear 32, the third planetary gear 32 rotationally drives the third planetary carrier 33, and at the same time, the second outer ring gear 24 rotationally drives the third planetary carrier 33 via the second clutch 42; Step S6 in which the engine transmits power to the input shaft 51; Step S7 in which the input shaft 51 rotates and drives the third planetary carrier 33 via the first clutch 41; Step S8 is included in which the third planetary carrier 33 rotates and drives the output shaft 55 to output power.

[0029] A power transmission method for a direct gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, the method including: Step S1 of putting the engine into an operating state, putting the first clutch 41, the second clutch 42, and the third clutch 43 into a disengaged state, and putting the front end motor 53 and the rear end motor 54 into a non-operating state; Step S2 in which the engine transmits power to the input shaft 51; The step S3 includes the input shaft 51 rotating the output shaft 55 via the first clutch 41 to output power.

[0030] A power transmission method for a braking regeneration gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, comprising: step S1 of putting the rear end motor 54 into an operating state, putting the third clutch 43 into an engaged state, putting the first clutch 41 and the second clutch 42 into a disengaged state, and putting the front end motor 53 and the engine into a non-operating state; Step S2 in which the output shaft 55 rotates and drives the third planetary carrier 33; Step S3 in which the third sun gear 31 is fixed to the case 52, so that the third planetary carrier 33 rotates and drives the third outer ring gear 34; Step S4 in which the third outer ring gear 34 rotates the second planetary carrier 23; Step S5 in which the third clutch 43 fixes the second outer ring gear 24, so that the second planetary carrier 23 rotates and drives the second planetary gear 22; Step S6 in which the second planetary gear 22 rotates the second sun gear 21; The method includes step S7 in which the second sun gear 21 rotates and drives the rotor of the rear-end motor 54, and stores the energy in a battery.

[0031] A power transmission method for an idle power generation gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to the present invention, the method including: Step S1: putting the front end motor 53 and the engine into an operating state, putting the first clutch 41, the second clutch 42 and the third clutch 43 into a disengaged state, and putting the rear end motor 54 into a non-operating state; Step S2 in which the engine transmits power to the input shaft 51; Step S3 in which the input shaft 51 rotates and drives the first planetary carrier 13; Step S4 in which the first planetary carrier 13 rotates the first planetary gear 12 since the first outer ring gear 14 is fixed to the case 52; Step S5 in which the first planetary gear 12 rotates the first sun gear 11; Step S6 includes causing the first sun gear 11 to rotate the rotor of the front-end motor 53 and storing the energy in a battery.

[0032] The present invention not only realizes various power combinations of the engine and the motor, but also maximizes the advantages of each of the engine and the motor, and not only meets the range requirements of conventional fuel-powered vehicles, but also has low infrastructure requirements, and electric vehicles also meet economic requirements, balancing the needs of all aspects. Multiple planetary gear mechanisms can achieve large gear ratio changes, and various power combination modes can be realized in cooperation with the clutch under conditions of limited space and few parts.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned embodiments, and can be embodied in other forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-limiting, and the scope of the present invention is defined by the appended claims, not the above description, and therefore all changes that come within the meaning and range of equivalence of the claims are intended to be embraced within the present invention. Any signs in the claims shall not be construed as limiting the scope of the claims.

[0034] Furthermore, although this specification has been described according to embodiments, each embodiment does not include only one independent technical solution, and this description in the specification is merely for the sake of clarity, and those skilled in the art should take this specification as a whole, and should understand that the technical solutions in various examples can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. The present invention includes an input shaft (51), a case (52), a front-end motor (53), a rear-end motor (54), an output shaft (55), a first clutch (41), a second clutch (42), a third clutch (43), a first planetary gear mechanism, a second planetary gear mechanism and a third planetary gear mechanism, an input end of the input shaft (51) is connected to an engine, an output end of the input shaft (51) is connected to the front-end motor (53) via the first planetary gear mechanism, and the input shaft (51) is connected to an output shaft (55) via the first clutch (41), and the output shaft (55) is connected to the third planetary gear mechanism, The third planetary gear mechanism is connected to the second clutch (42) and the second planetary gear mechanism, the second clutch (42) and the second planetary gear mechanism are both connected to the third clutch (43), the second planetary gear mechanism is connected to a rear-end motor (54), a stator of the front-end motor (53), a stator of the rear-end motor (54), the third clutch (43), the first planetary gear mechanism and the third planetary gear mechanism are all connected to a case (52), and the first planetary gear mechanism includes a first sun gear (11), a first planetary gear (12), a first planetary carrier ( The first planetary carrier (13) is fixedly connected to an input shaft (51) and a first clutch (41), and the first planetary carrier (13) is provided with a first planetary gear (12), and the first planetary gear (12) is meshed with a first sun gear (11) and a first outer ring gear (14), the first outer ring gear (14) is fixedly installed on a case (52), and the first sun gear (11) is connected to a rotor of a front-end motor (53), and the third planetary gear mechanism includes a third sun gear (31), a third planetary gear (32), a second outer ring gear (33), and a third outer ring gear (34). The second planetary gear mechanism includes a second sun gear (21), a third planetary gear (22), a third planetary carrier (33), and a third outer ring gear (34), the third planetary carrier (33) is fixedly connected to an output shaft (55) and a second clutch (42), and a third planetary gear (32) is installed on the third planetary carrier (33), the third planetary gear (32) is meshed with a third sun gear (31) and a third outer ring gear (34), the third outer ring gear (34) is connected to a second planetary gear, and the third sun gear (31) is connected to a case (52), and the second planetary gear mechanism includes a second sun gear (21), a second planetary gear (22),A power transmission device for a planetary gear mechanism multi-gear hybrid vehicle, comprising a second planetary carrier (23) and a second outer ring gear (24), the second planetary carrier (23) is fixedly connected to the third outer ring gear (34), and the second planetary carrier (23) is provided with a second planetary gear (22), the second planetary gear (22) is meshed with a second sun gear (21) and a second outer ring gear (24), the second outer ring gear (24) is connected to a second clutch (42) and a third clutch (43), and the second sun gear (21) is connected to a rotor of a rear-end motor (54).

2. Step S1: putting the front end motor (53) and the engine in a non-operating state, putting the first clutch (41) and the second clutch (42) in a disengaged state, putting the third clutch (43) in an engaged state, and putting the rear end motor (54) in an operating state; Step S2: starting the rear end motor (54) to rotate the second sun gear (21); Step S3, in which the second sun gear (21) rotates and drives the second planetary gear (22); Step S4, in which the second planetary gear (22) rotates and drives the second planetary carrier (23); Step S5, in which the second planetary carrier (23) rotates the third outer ring gear (34); Step S6, in which the third outer ring gear (34) rotates the third planetary gear (32); Step S7 in which the third planetary gear (32) rotates and drives the third planetary carrier (33); 2. The power transmission method for the EV1 gear stage of a power transmission device for a planetary gear mechanism multi-stage hybrid vehicle according to claim 1, further comprising a step S8 in which the third planetary carrier (33) rotates and drives an output shaft (55) to output power.

3. Step S1: putting the front end motor (53) and the engine in a non-operating state, putting the first clutch (41) and the third clutch (43) in a disengaged state, putting the second clutch (42) in an engaged state, and putting the rear end motor (54) in an operating state; Step S2: starting the rear end motor (54) to rotate the second sun gear (21); Step S3, in which the second sun gear (21) rotates and drives the second planetary gear (22); Step S4, the second planetary gear (22) drives the second planetary carrier (23) and the second outer ring gear (24) to rotate simultaneously; Step S5, in which the second planetary carrier (23) rotates and drives the third outer ring gear (34), the third outer ring gear (34) rotates and drives the third planetary gear (32), the third planetary gear (32) rotates and drives the third planetary carrier (33), and at the same time, the second outer ring gear (24) rotates and drives the third planetary carrier (33) via the second clutch (42); The power transmission method for the EV2 gear stage of a power transmission device for a planetary gear mechanism multi-stage hybrid vehicle as described in claim 1, further comprising a step S6 of the third planetary carrier (33) rotating and driving the output shaft (55) to output power.

4. Step S1: putting the front end motor (53), the rear end motor (54) and the engine into an operating state, putting the first clutch (41) and the second clutch (42) into a disengaged state, and putting the third clutch (43) into an engaged state; Step S2: starting the engine to rotate the input shaft (51); Step S3, in which the input shaft (51) rotates and drives the first planetary carrier (13); Step S4, in which the first planetary carrier (13) rotates and drives the first planetary gear (12); Step S5, in which the first planetary gear (12) rotates and drives the first sun gear (11); Step S6, the first sun gear (11) rotates and drives the rotor of the front-end motor (53) to store energy in a battery; Step S7, in which the rear end motor (54) receives energy from a battery and rotates the second sun gear (21); Step S8 in which the second sun gear (21) rotates and drives the second planetary gear (22); Step S9, in which the second planetary gear (22) rotates and drives the second planetary carrier (23); Step S10, in which the second planetary carrier (23) rotates and drives a third outer ring gear (34); Step S11, in which the third outer ring gear (34) rotates the third planetary gear (32); Step S12 in which the third planetary gear (32) rotates and drives the third planetary carrier (33); 2. The power transmission method for a series one gear stage of a power transmission device for a planetary gear mechanism multi-stage hybrid vehicle according to claim 1, further comprising a step S13 of rotating the third planetary carrier (33) to drive an output shaft (55) to output power.

5. Step S1: putting the front end motor (53), the rear end motor (54) and the engine into an operating state, putting the first clutch (41) and the third clutch (43) into a disengaged state, and putting the second clutch (42) into an engaged state; Step S2: starting the engine to rotate the input shaft (51); Step S3, in which the input shaft (51) rotates and drives the first planetary carrier (13); Step S4, in which the first planetary carrier (13) rotates and drives the first planetary gear (12); Step S5, in which the first planetary gear (12) rotates and drives the first sun gear (11); Step S6, the first sun gear (11) rotates and drives the rotor of the front-end motor (53) to store energy in a battery; Step S7, in which the rear end motor (54) receives energy from a battery and rotates the second sun gear (21); Step S8 in which the second sun gear (21) rotates and drives the second planetary gear (22); Step S9, the second planetary gear (22) drives the second planetary carrier (23) and the second outer ring gear (24) to rotate simultaneously; Step S10, in which the second planetary carrier (23) rotationally drives the third outer ring gear (34), the third outer ring gear (34) rotationally drives the third planetary gear (32), the third planetary gear (32) rotationally drives the third planetary carrier (33), and at the same time, the second outer ring gear (24) rotationally drives the third planetary carrier (33) via a second clutch (42); 2. The method for transmitting power through two in-line gear stages of a power transmission device for a planetary gear mechanism multi-stage hybrid vehicle according to claim 1, further comprising a step S11 of rotating the third planetary carrier (33) to drive an output shaft (55) to output power.

6. Step S1: putting the rear-end motor (54) and the engine into an operating state, both of which serve as power outputs for the power transmission device, putting the first clutch (41) and the third clutch (43) into an engaged state, putting the second clutch (42) into a disengaged state, and putting the front-end motor (53) into a non-operating state; Step S2: starting the rear end motor (54) to rotate the second sun gear (21); Step S3, in which the second sun gear (21) rotates and drives the second planetary gear (22); Step S4, in which the second planetary gear (22) rotates and drives the second planetary carrier (23); Step S5, in which the second planetary carrier (23) rotates the third outer ring gear (34); Step S6, in which the third outer ring gear (34) rotates the third planetary gear (32); Step S7 in which the third planetary gear (32) rotates and drives the third planetary carrier (33); Step S8, in which the engine transmits power to an input shaft (51); Step S9 in which the input shaft (51) rotates and drives the third planetary carrier (33) via the first clutch (41); 2. The power transmission method of claim 1, further comprising a step S10 of rotating the third planetary carrier (33) to drive an output shaft (55) to output power.

7. Step S1: putting the rear-end motor (54) and the engine into an operating state, both of which serve as power outputs for the power transmission device, putting the first clutch (41) and the second clutch (42) into an engaged state, putting the third clutch (43) into a disengaged state, and putting the front-end motor (53) into a non-operating state; Step S2: starting the rear end motor (54) to rotate the second sun gear (21); Step S3, in which the second sun gear (21) rotates and drives the second planetary gear (22); Step S4, the second planetary gear (22) drives the second planetary carrier (23) and the second outer ring gear (24) to rotate simultaneously; Step S5, in which the second planetary carrier (23) rotationally drives the third outer ring gear (34), the third outer ring gear (34) rotationally drives the third planetary gear (32), the third planetary gear (32) rotationally drives the third planetary carrier (33), and at the same time, the second outer ring gear (24) rotationally drives the third planetary carrier (33) via the second clutch (42); Step S6, in which the engine transmits power to an input shaft (51); Step S7 in which the input shaft (51) rotates and drives the third planetary carrier (33) via the first clutch (41); 2. The power transmission method for parallel two gear stages of a power transmission device of a planetary gear mechanism multi-stage hybrid vehicle according to claim 1, further comprising a step S8 in which the third planetary carrier (33) rotates and drives an output shaft (55) to output power.

8. Step S1: putting the engine into an operating state, putting the first clutch (41), the second clutch (42), and the third clutch (43) into a disengaged state, and putting the front end motor (53) and the rear end motor (54) into a non-operating state; Step S2 in which the engine transmits power to an input shaft (51); 2. The power transmission method of claim 1, further comprising a step S3 of rotating the input shaft (51) through the first clutch (41) to drive the output shaft (55) to rotate, thereby outputting power.

9. Step S1: putting the rear end motor (54) into an operating state, putting the third clutch (43) into an engaged state, putting the first clutch (41) and the second clutch (42) into a disengaged state, and putting the front end motor (53) and the engine into a non-operating state; Step S2, in which the output shaft (55) rotates and drives the third planetary carrier (33); Step S3, in which the third planetary carrier (33) rotates the third outer ring gear (34); Step S4, in which the third outer ring gear (34) rotates the second planetary carrier (23); Step S5 in which the second planetary carrier (23) rotates and drives the second planetary gear (22); Step S6, in which the second planetary gear (22) rotates and drives the second sun gear (21); 2. The power transmission method of the braking regeneration gear stage of the power transmission device of the planetary gear mechanism multi-stage gear hybrid vehicle according to claim 1, further comprising a step S7 of rotating the second sun gear (21) to drive the rotor of the rear-end motor (54) and storing the energy in a battery.

10. Step S1: putting the front end motor (53) and the engine into an operating state, putting the first clutch (41), the second clutch (42) and the third clutch (43) into a disengaged state, and putting the rear end motor (54) into a non-operating state; Step S2 in which the engine transmits power to an input shaft (51); Step S3, in which the input shaft (51) rotates and drives the first planetary carrier (13); Step S4, in which the first planetary carrier (13) rotates and drives the first planetary gear (12); Step S5, in which the first planetary gear (12) rotates and drives the first sun gear (11); 2. The power transmission method for an idle power generation gear stage of a power transmission device of a planetary gear mechanism multi-stage gear hybrid vehicle according to claim 1, further comprising a step S6 of rotating the first sun gear (11) to rotate a rotor of a front-end motor (53) and storing energy in a battery.

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