초록 ▼

A vehicle brake monitor for a brake actuator having a housing and a rod reciprocal through an opening in the housing. The brake monitor includes a magnet and a sensor located within the magnetic field of the magnet and fixed relative to the housing, and a shunt which is reciprocal with the brake act

A vehicle brake monitor for a brake actuator having a housing and a rod reciprocal through an opening in the housing. The brake monitor includes a magnet and a sensor located within the magnetic field of the magnet and fixed relative to the housing, and a shunt which is reciprocal with the brake actuator rod between the magnet and the sensor which interrupts a signal between the sensor and the magnet when the shunt is located between the magnet and the sensor during reciprocal movement of the rod, signaling at least one position of the rod relative to the housing. The disclosed embodiment of the brake monitor includes a sensor sleeve having two pairs of generally opposed magnets and sensors and a shunt sleeve surrounding the brake actuator rod having a pair of circumferentially spaced shunts which reciprocate with the brake actuator rod between each of the pairs of sensors and magnets, sensing and indicating several conditions of the brake actuator, including an overstroke condition, dragging brake, a failure of the brake monitoring system and normal operation.

대표청구항 ▼

1. A vehicle brake monitor, comprising:a brake actuator including a housing and a rod reciprocable through an opening in said housing for actuation of a vehicle brake; an annular shunt sleeve and surrounding said rod fixed to said rod and reciprocable with said rod having a radially projecting flang

1. A vehicle brake monitor, comprising:a brake actuator including a housing and a rod reciprocable through an opening in said housing for actuation of a vehicle brake; an annular shunt sleeve and surrounding said rod fixed to said rod and reciprocable with said rod having a radially projecting flange portion; a ferrous metal shunt located within said radially projecting flange portion of said shunt sleeve extending radially relative to said rod having a length less than said rod; a sensor and a magnet fixed relative to said housing on opposed sides of said flange portion of said annular shunt sleeve and said ferrous metal shunt; and said shunt interrupting a signal between said sensor and said magnet when said shunt is located between said sensor and said magnet during reciprocal movement of said rod signaling at least one position of said rod relative to said housing.