Anti-lock braking system
View Patent ↗Provided is an anti-lock braking system for a vehicle. The anti-lock braking system includes a hub having a hollow cavity which is configured to accommodate an axle, a device having a first part which is substantially static relative to the hub and a second part which may rotate relative to the hub when the first part and the second part are disengaged, and an actuator which is configured to control a transmission of a braking force from a frame of the vehicle to the hub by actuating the device, wherein one of the first part and the second part is configured to extend helically around the axle.
1 . An anti-lock braking system for a vehicle, comprising:
a hub having a hollow cavity that accommodates an axle, the hub being rotatable about the axle;
a device having a first part that rotates concurrently with the hub and a second part which may rotate relative to the hub when the first part and the second part are disengaged; and
an actuator which is configured to control a transmission of a braking force from a frame of the vehicle to the hub by actuating the device;
wherein
one of the first part or the second part extends helically around the axle along a length of the axle.
2 . The anti-lock braking system of claim 1 , further comprising:
a disc brake that is spaced apart from the first part;
a disc on which the disc brake operates;
wherein the first part extends helically around the axle;
wherein the second part comprises a cylindrical portion; and
wherein the disc is connected to, attached to, or integrally formed with, said cylindrical portion.
3 . The anti-lock braking system of claim 2 , further comprising:
a first element;
a second element; and
a torsion spring;
wherein the torsion spring is connected to the first part by the first element;
wherein the second element is movable by the actuator; and
wherein the second element causes the first element to rotate relative to the hub around the axle when the second element is moved parallel to a longitudinal axis (A) of the axle.
4 . The anti-lock braking system of claim 3 ,
wherein the second element comprises a magnetic material and the actuator is configured to generate a magnetic field when activated; and/or
wherein the actuator comprises an electromagnet which is static relative to the axle.
5 . The anti-lock braking system of claim 1 , further comprising:
an inertial measurement unit, wherein the inertial measurement unit is mounted on the axle.
6 . The anti-lock braking system of claim 5 , wherein the inertial measurement unit is configured to measure a yaw rate of the vehicle.
7 . The anti-lock braking system of claim 5 , further comprising:
an angular rate sensor, wherein the angular rate sensor is configured to measure an angular rate of the hub.
8 . The anti-lock braking system of claim 5 , further comprising:
a controller;
wherein the controller is mounted on the axle;
wherein the controller is configured to determine, based on measurements of the inertial measurement unit and/or the angular rate sensor whether the braking force exerted on the hub is to be reduced to prevent a wheel comprising the hub from locking up; and
wherein the controller is further configured to reduce the braking force exerted on the hub by activating the actuator.
9 . The anti-lock braking system of claim 1 , further comprising:
a generator;
wherein the generator comprises a first portion which is static relative to the axle and a second portion which is static relative to the hub; and
wherein the first portion has a power output.
10 . The anti-lock braking system of claim 9 , further comprising:
a lighting, wherein the generator is configured to provide electric energy to power the lighting through the power output.
11 . The anti-lock braking system of claim 1 , further comprising:
a torsion spring;
wherein the torsion spring is configured to cause the first part and the second part to engage when the actuator is deactivated.
12 . The anti-lock braking system of claim 1 , wherein the device is a band clutch.
13 . The anti-lock braking system of claim 1 , wherein the device is a wrap spring clutch.
14 . The anti-lock braking system of claim 1 , further comprising:
a disc brake that is spaced apart from the first part;
a disc on which the disc brake operates;
wherein the second part extends helically around the axle; and
wherein the disc is connected to, attached to, or integrally formed with, said second part.
15 . The anti-lock braking system of claim 1 , wherein the vehicle is a single-track vehicle.