TRANSAXLE AND TWO-SPEED DRIVE MODULE THEROF

• US 20190120350A1
• Filed: 03/16/2017
• Published: 04/25/2019
• Est. Priority Date: 04/28/2016
• Status: Active Grant

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: Zhong, Hu, Chen, Peng
• Granted Patent: US 10,808,814 B2
• Time in Patent Office: Days
• CPC Class Codes: B60K 1/00 Arrangement or mounting of electrical propulsion units B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00; electric transmission arrangements B60K17/12; electric equipment or propulsion of electrically-propelled vehicles per se B60L; current-collectors for power supply lines of electrically-propelled vehicles B60L5/00
• CPC Class Codes: B60K 17/08 of mechanical type
• CPC Class Codes: B60K 17/165 provided between independent half axles B60K17/18, B60K17/20 take precedence
• CPC Class Codes: B60K 2001/001 one motor mounted on a propulsion axle for rotating right and left wheels of this axle
• CPC Class Codes: F16H 2037/028 having two distinct forward drive ratios and one reverse drive ratio arranged in series with a continuously variable transmission unit
• CPC Class Codes: F16H 2200/0008 specially adapted for front-wheel-driven vehicles
• CPC Class Codes: F16H 2200/0034 the gear ratios comprising two forward speeds
• CPC Class Codes: F16H 2200/2005 with one sets of orbital gears
• CPC Class Codes: F16H 3/089 all of the meshing gears being supported by a pair of parallel shafts, one being the input shaft and the other the output shaft, there being no countershaft involved
• CPC Class Codes: F16H 37/02 comprising essentially only toothed or friction gearings
• CPC Class Codes: F16H 37/041 for conveying rotary motion with constant gear ratio
• CPC Class Codes: F16H 37/0813 with only one input shaft differentials for four wheel drive vehicles B60K17/346

Abstract

A transaxle and a two-speed drive module thereof. The two-speed drive module comprises an input shaft, an output shaft, and gear sets used for transmitting power between the input shaft and the output shaft. The gear sets comprise: a two-speed gear set having two groups of shift gear pairs that have different speed ratios, the shift gear pairs being capable of transmittingly connecting to or disconnecting from the input shaft so as to output the rotational speed of the input shaft at different speed ratios; a planetary gear set having an output end thereof being transmittingly connected to the output shaft; and a connecting gear set by which the two-speed gear set is transmittingly connected to the planetary gear set. The two-speed drive module can implement a reduction in the radial dimension, and can reduce the ground clearance of a transaxle.

Claims

1. A transaxle two-speed drive module, comprising:

an input shaft;

an output shaft;

a gear assembly for transmitting power between the input shaft and the output shaft, the gear assembly comprises;

a two-speed gear set having two sets of shift gear pairs with different speed ratios,

the shift gear pairs being adapted to be drive-connected or disconnected from the input shaft in order to change an output rotational speed of the input shaft to different speed ratios;

a planetary gear set having an output end that is drive-connected to the output shaft;

a connecting gear set that drivingly connects the two-speed gear set and the planetary gear set.

2. The two-speed drive module of claim 1, wherein the two-speed gear set further comprises:

an intermediate shaft;

said shift gear pairs include an intermeshing idler gear and a solid idler gear, the idler gear is idled on either said input shaft or said intermediate shaft, and said solid idler gear is fixed on the other of the input shaft or the intermediate shafts; and

a synchronizer is fixed on a same one of either said input shaft or said intermediate shaft as the idler gear, and is adapted for engaging with or disengaging from the idler gear of the shift gear pair.

3. The two-speed drive module of claim 2, wherein said idler gear and the synchronizer are on the input shaft, and the solid idler gear is on the intermediate shaft;

and

the connecting gear set is located between the two sets of the shift gear pairs, in an axial direction of the intermediate shaft.

4. The two-speed drive module of claim 3, wherein said connecting gear set includes a first gear that is fixed on said intermediate shaft, and a second gear that is connected to an input end of the planetary gear set;

and

the first gear and the second gear are drive-connected via a transmission part.

5. The two-speed drive module of claim 4, wherein the transmission part is a gear, a belt, or a chain.

6. The two-speed drive module of claim 2, wherein said idler gear and said synchronizers are on the intermediate shaft, and said solid idler gear is on said input shaft;

and

said connecting gear set is on one side of the two shift gear pairs, in an axial direction of the intermediate shaft.

7. The two-speed drive module of claim 6, wherein said connecting gear set comprises a first gear fixed on said intermediate shaft, and a second gear connected to an input end of the planetary gear set;

and

said first gear and said second gear intermesh with each other.

8. The two-speed drive module of claim 1, wherein said planetary gear set includes a sun gear as an input end and includes a planetary carrier as the connection between the output end and the output shaft.

9. A transaxle comprising the two-speed drive module of claim 1, a motor, and a differential,

an output end of the motor is connected to said input shaft of the two-speed drive module, and an input end of the differential is connected to said output shaft of the two-speed drive module.

10. A transaxle two-speed drive module, comprising:

an input shaft;

an output shaft;

a gear assembly for transmitting power between the input shaft and the output shaft, the gear assembly comprises;

a two-speed gear set having two sets of shift gear pairs with different speed ratios,

the shift gear pairs being adapted to be drivingly connected or disconnected from the input shaft in order to change an output rotational speed of the input shaft;

a planetary gear set having an output end that is drivingly connected to the output shaft; and

an output of the two-speed gear set is connected to the planetary gear set.

11. The two-speed drive module of claim 10, wherein the output of the two-speed gear set is connected to the planetary gear set by a first gear that is fixed on an intermediate shaft, and a second gear that is connected to an input end of the planetary gear set, and the first gear and the second gear are drivingly connected via a transmission part.

12. The two-speed drive module of claim 11, wherein the transmission part is a gear, a belt, or a chain.

13. The two-speed drive module of claim 10, wherein the two-speed gear set further comprises:

an intermediate shaft;

said shift gear pairs include an intermeshing idler gear and a solid idler gear, the idler gear is idled on either said input shaft or said intermediate shaft, and said solid idler gear is fixed on the other of the input shaft or the intermediate shafts; and

a synchronizer is fixed on a same one of either said input shaft or said intermediate shaft as the idler gear for each of said shift gear pairs, and is adapted for engaging with or disengaging from the idler gear of the shift gear pair.

14. The two-speed drive module of claim 10, wherein the idler gear and the synchronizers are on the intermediate shaft, and said solid idler gear is on said input shaft.

15. The two-speed drive module of claim 10, wherein said planetary gear set includes a sun gear as an input end and includes a planetary carrier as the connection between the output end and the output shaft.