Gear actuator for double clutch transmission

Patent metadata

Field	Value
Publication number	US-10704681-B2
Application number	US-201715651292-A
Country	US
Kind code	B2
Filing date	Jul 17, 2017
Priority date	Jul 18, 2016
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

Disclosed herein is a gear actuator for a double clutch transmission, which includes a power module ( 100 ), including odd and even-numbered stage select solenoids and shift motors, a controller directly connected to them, and select levers connected to select rods of the select solenoids, shift modules ( 200 ) for transmitting the rotational forces of the shift motors to a control shaft assembly ( 300 ), the control shaft assembly ( 300 ) for transmitting the operating force of the power module ( 100 ) to a shift lug, and a body housing ( 400 ) having the power module ( 100 ), the shift modules ( 200 ), and the control shaft assembly ( 300 ) installed therein. Accordingly, the gear actuator can have a more compact structure and be easily assembled by modularization.

First claim

What is claimed is:

1. A gear actuator for a double clutch transmission, comprising:
a power module in which a controller is directly connected to an odd-numbered stage select solenoid, an odd-numbered stage shift motor, an even-numbered stage select solenoid and an even-numbered stage shift motor;
a body housing having the power module installed therein; and
a control shaft assembly connected to the power module in the body housing to transmit select and shift operating forces,
wherein the odd-numbered stage elect solenoid and the odd-numbered stage shift motor are disposed in one side of the power module and the even-numbered stage select solenoid and the even-numbered stage shift motor are disposed in an other side of the power module with respect to a center of the power module.

2. The gear actuator according to claim 1 , wherein the power module comprises a power module housing, the power module housing comprises a rear controller installation part and a front electric device installation part, the controller is installed in the controller installation part, the odd and even-numbered stage select solenoids and the odd and even-numbered stage shift motors are installed in the electric device installation part, and select rods of the select solenoids and rotary shafts of the shift motors protrude forward and outward from the electric device installation part.

3. The gear actuator according to claim 2 , wherein the controller installation part is open at a rear surface thereof, the controller installation part is provided with a cover for covering the open rear surface, the controller is mounted inside the cover, and a connector having a terminal for transmitting power and a shift lever operation signal to the controller is formed on one surface of the controller installation part.

4. The gear actuator according to claim 3 , wherein the cover has a plurality of cooling fins formed at a rear surface thereof.

5. The gear actuator according to claim 2 , wherein odd and even-numbered stage select lever mounting parts protrude forward of the electric device installation part, an odd-numbered stage select lever is pivotably installed to a side of the odd-numbered stage select lever mounting part, an even-numbered stage select lever is pivotably installed to a side of the even-numbered stage select lever mounting part, and one end of each of the select levers is pivotably connected to the select rod of an associated one of the select solenoids.

6. The gear actuator according to claim 2 , wherein the controller comprises a hall sensor for detecting operation displacements of the select rods of the select solenoids, and an angle sensor for detecting angles of operation of the rotary shafts of the shift motors.

7. The gear actuator according to claim 6 , wherein the controller individually and independently controls the odd-numbered stage select solenoid and odd-numbered stage shift motor and the even-numbered stage select solenoid and the even-numbered stage shift motor to secure a failsafe function.

8. The gear actuator according to claim 2 , wherein rubber boots are installed between the select rods of the select solenoids and select rod holes of the electric device installation part.

9. The gear actuator according to claim 2 , wherein sealing rings are installed between the rotary shafts of the shift motors and rotary shaft holes of the electric device installation part.

10. The gear actuator according to claim 1 , wherein shift modules are inserted into the body housing to transmit output of rotary shafts of the shift motors to shift finger members mounted to control shafts of the control shaft assembly, thereby rotating the shift finger members.

11. The gear actuator according to claim 10 , wherein each of the shift modules comprises a ball screw comprising a screw spline-connected to the rotary shaft of an associated one of the shift motors, a nut surrounding the screw, and a plurality of balls interposed between the screw and the nut, and bearings respectively provided at both ends of the screw.

12. The gear actuator according to claim 11 , wherein the nut has a guide groove formed in one side thereof, and a guide bolt, an end of which is inserted into the guide groove, is fixedly inserted into a guide bolt hole passing through the body housing.

13. The gear actuator according to claim 1 , wherein the control shaft assembly has a double shaft structure consisting of an odd-numbered stage control shaft and an even-numbered stage control shaft, a pair of select guides and a shift finger are formed in and protrudes from each of shift finger members fixed at upper portions of the respective control shafts, the odd-numbered stage select guides and shift finger protrude in a direction in which the odd-numbered stage select solenoid and the odd-numbered stage shift motor are installed, and the even-numbered stage select guides and shift finger protrude in a direction in which the even-numbered stage select solenoid and the even-numbered stage shift motor are installed.

14. The gear actuator according to claim 13 , wherein each of the shift finger members has a detent groove formed thereon, and a detent mechanism having a detent ball seated on the detent groove is inserted and installed into a detent mechanism hole formed in a portion facing the detent groove in the body hosing.

15. The gear actuator according to claim 13 , wherein the odd-numbered stage control shaft has a detent groove formed in an upper end thereof, in which case a detent mechanism having a detent ball seated on the detent groove is inserted and installed into a detent mechanism hole formed in the body hosing, and the even-numbered stage control shaft has a detent groove formed in an intermediate portion thereof, in which case a detent mechanism having a detent ball seated on the detent groove is inserted and installed into a detent mechanism hole formed in a support bracket supporting the control shaft assembly.

16. The gear actuator according to claim 14 , wherein the detent mechanism comprises a cylindrical case, a spring inserted into the case, a ball support member supported by the spring, and a detent ball seated and supported on a concave surface of the ball support member.

17. The gear actuator according to claim 10 , wherein the body housing is formed with a shift module insertion part and a select lever installation part, and an opening is formed in an inlet of a back surface of the body housing so that the shift module insertion part communicates with the select lever installation part through the opening.

18. The gear actuator according to claim 15 , wherein the detent mechanism comprises a cylindrical case, a spring inserted into the case, a ball support member supported by the spring, and a detent ball seated and supported on a concave surface of the ball support member.

Assignees

• Hyundai Dymos Inc

Inventors

• Lee Man Bok
• Kim Won
• Oh Mi Ae

Classifications

• F16H61/12 Primary

  Detecting malfunction or potential malfunction, e.g. fail safe (in control of hydrostatic gearing F16H61/4192) {; Circumventing or fixing failures} · CPC title

• F16H2063/025

  Final output mechanisms for double clutch transmissions · CPC title

• F16H61/0006

  Electronic control units for transmission control, e.g. connectors, casings or circuit boards · CPC title

• F16H61/0003

  Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox · CPC title

• F16H61/32 Primary

  Electric motors  {, actuators or related electrical control means}  therefor · CPC title