Apparatus for sensing displacement of brake pedal
Provided is an apparatus for sensing a displacement of a brake pedal, the apparatus including: a shaft extending parallel to a movement direction of a piston of a master cylinder displaced by an operation of the brake pedal; a magnet supported by the shaft; a mounting member configured to couple the piston and the shaft; and a sensor configured to detect a change in magnetic force by the magnet, wherein the shaft and the magnet are accommodated in a shaft bore formed through or formed to be recessed in a hydraulic block including a plurality of passages and valves which control flow of a pressing medium, and the shaft bore communicates with a cylinder bore formed in the hydraulic block and receiving the piston.
1. An apparatus for sensing a displacement of a brake pedal, the apparatus comprising:
a shaft extending parallel to a movement direction of a piston of a master cylinder displaced by an operation of the brake pedal;
a magnet supported by the shaft;
a mounting member configured to couple the piston and the shaft; and
a sensor configured to detect a change in magnetic force by the magnet,
wherein the shaft and the magnet are accommodated in a shaft bore formed through or formed to be recessed in a hydraulic block including a plurality of passages and valves which control flow of a pressing medium, and
the shaft bore communicates with a cylinder bore formed in the hydraulic block and receiving the piston,
a cover member mounted on the magnet to cover the magnet and be slidable together with the magnet inside the shaft bore.
2. The apparatus of claim 1 , further comprising:
a housing provided on a side where the shaft bore and the cylinder bore are formed on the hydraulic block.
3. The apparatus of claim 2 , wherein the housing comprises a receiving groove provided to receive at least a portion of the shaft or the magnet.
4. The apparatus of claim 1 , wherein the mounting member comprises a first coupling hole formed through one side to which the piston is coupled, and a second coupling hole formed through another side to which the shaft is coupled.
5. The apparatus of claim 1 , wherein a plurality of magnets are disposed in the movement direction of the piston, and
the apparatus further comprises a gap forming member disposed between the plurality of magnets to form a gap between the plurality of magnets.
6. The apparatus of claim 5 ,
wherein the cover member covers both the magnet and the gap forming member.
7. The apparatus of claim 4 , wherein the shaft comprises a coupling groove where the second coupling hole is seated and a support part extending outwardly from one end of the coupling groove to support the mounting member.
8. The apparatus of claim 4 , further comprising:
a flange part extending outwardly from the piston to support the mounting member.
9. The apparatus of claim 8 , wherein the flange part is provided integrally with the piston.
10. The apparatus of claim 3 , wherein the housing comprises a through hole through which the piston passes.
11. The apparatus of claim 10 , further comprising:
a sealing member provided between the piston and the through hole.
12. The apparatus of claim 1 , wherein the shaft bore extends parallel to the movement direction of the piston in the hydraulic block.
13. The apparatus of claim 1 , wherein the sensor is mounted on an outer surface of the hydraulic block.