Shift actuator for a transmission

• US 20050034550A1
• Filed: 09/22/2004
• Published: 02/17/2005
• Est. Priority Date: 07/02/2001
• Status: Active Grant

• Current Assignee: Masahiko Hayashi, Nobuyuki Iwao, Yasushi Yamamoto
• Original Assignee: Masahiko Hayashi, Nobuyuki Iwao, Yasushi Yamamoto
• Inventors: Yamamoto, Yasushi, Hayashi, Masahiko, Iwao, Nobuyuki
• Granted Patent: US 7,222,554 B2
• Time in Patent Office: Days
• US Class Current: 74/473.120
• CPC Class Codes: F16H 61/32 Electric motors actuators or related electrical control means therefor
• CPC Class Codes: Y10T 74/19251 Control mechanism
• CPC Class Codes: Y10T 74/20024 Fluid actuator
• CPC Class Codes: Y10T 74/2003 Electrical actuator

Abstract

A shift actuator for a transmission for turning, in a direction of shift, a shift lever support mechanism mounting the shift lever of the transmission, wherein it comprises an operation lever coupled, at its intermediate portion, to said shift lever support mechanism, the first electromagnetic solenoid and the second electromagnetic solenoid which are each coupled to both ends of said operation lever so as to operate in the upward and downward directions; and an operation rod of said first electromagnetic solenoid is coupled to one end of said operation lever and an operation rod of said second electromagnetic solenoid is coupled to the other end of said operation lever.

Claims

1. A shift actuator for a transmission, said shift actuator comprising:

a shift lever support mechanism mounting a shift lever of the transmission;

an operation lever having an intermediate portion coupled to said shift lever support mechanism;

a first actuator coupled to a first end of said operation lever;

a second actuator coupled to a second end of said operation lever, said first actuator and said second actuator adapted to operate said operation lever in upward and downward directions, wherein;

each of said first actuator and said second actuator comprises an operation rod coupled to said operation lever, a magnetic moving member on an outer peripheral surface of said operation rod, a cylindrical fixed yoke surrounding said magnetic moving member, and a pair of coils arranged side by side in the axial direction of said operation rod inside said fixed yoke.

2. A shift actuator according to claim 1, wherein said shift lever support mechanism is arranged nearly in a horizontal state, and said first electromagnetic solenoid and said second electromagnetic solenoid are below said shift lever support mechanism.

3. A shift actuator for a transmission according to claim 1, wherein said magnetic moving members are arranged on both sides of said pair of coils.

4. A shift actuator for a transmission according to claim 3, wherein said magnetic moving members are arranged in bobbins on which said pair of coils are wound.