ELECTRIC LINEAR MOTION ACTUATOR AND ELECTRIC BRAKE SYSTEM
First Claim
1. An electric linear motion actuator comprising a motion converter mechanism for converting a rotary motion of a rotor shaft of an electric motor, or a rotary motion of a rotary member to which the rotation of the rotor shaft is transmitted to a linear motion of an output member for linearly driving a driven member, wherein the driven member is configured to be pushed by a front side of the output member, characterized in that a load sensor is mounted in the motion converter mechanism, the load sensor being configured to detect a pushing force with which the output member pushes the driven member when the driven member is linearly driven by the output member.
1 Assignment
0 Petitions
Accused Products
Abstract
An electric brake system is proposed which includes an electric linear motion actuator and can generate the required braking force with high accuracy. A load sensor (30) is provided in a motion converting mechanism of the actuator which converts the rotary motion of a rotary shaft (4) to which the rotation of an electric motor (2) is transmitted to linear motion of an outer ring member (5) as an output member. The load sensor (30) detects the pushing force with which the outer ring member (5) linearly drives a driven member. With this arrangement, if the driven member is a braking member of an electric brake system, it is possible to directly detect the braking force applied by the driven member and thus to accurately generate the required braking force.
-
Citations
23 Claims
- 1. An electric linear motion actuator comprising a motion converter mechanism for converting a rotary motion of a rotor shaft of an electric motor, or a rotary motion of a rotary member to which the rotation of the rotor shaft is transmitted to a linear motion of an output member for linearly driving a driven member, wherein the driven member is configured to be pushed by a front side of the output member, characterized in that a load sensor is mounted in the motion converter mechanism, the load sensor being configured to detect a pushing force with which the output member pushes the driven member when the driven member is linearly driven by the output member.
Specification