Spring loaded anti-lock braking system sensor

• US 8,381,882 B1
• Filed: 05/26/2011
• Issued: 02/26/2013
• Est. Priority Date: 05/26/2011
• Status: Active Grant

• Current Assignee: Tuson RV Brakes, LLC
• Original Assignee: Tuson RV Brakes, LLC
• Inventors: Hoogenakker, Alan
• Primary Examiner(s): KING, BRADLEY T
• Application Number:
  US13/134,017
• Time in Patent Office: 642 Days
• Field of Search: 188/1.11 E, 303/138, 761/150.8, 768/665, 731/150.8, 738/665, 310/168, 324/207.25, 324/173
• US Class Current: 188/1.11E
• CPC Class Codes: B60T 8/329 Systems characterised by their speed sensor arrangements
• CPC Class Codes: G01P 1/026 for speed measuring devices, e.g. pulse generator

Abstract

An anti-lock braking system includes a sensor apparatus that includes a sensor body. In a first position, the sensor body is positioned such that a desired gap is maintained between the sensor body and a reference point located on a tone ring, which is rotatably coupled to a corresponding wheel hub. In the first position, a spring-loaded plunger holds the sensor body in place. When the sensor body is moved to a second position, a plunger pin is displaced within the plunger, putting tension on an internal spring. The tension in the spring returns the sensor body to the first position.

Claims

1. An antilock braking system that corresponds to a wheel, the system comprising:

a braking assembly, wherein the braking assembly includes a brake flange mounted to an axle;

a wheel hub rotatably coupled to an outside end of the axle;

a tone ring having a reference point disposed thereon, wherein the tone ring is coupled to the wheel hub;

a sensor that is moveably coupled to the brake flange, wherein the sensor senses the reference point to generate data about a speed associated with the corresponding wheel;

a mounting bracket being generally U-shaped and comprising a first arm member extending away from a first end of a connecting member and a second arm member extending away from a second end of the connecting member, wherein the first and second arm members are substantially parallel to each other and substantially perpendicular to the connecting member; and

a hollow bolt housing associated with said sensor that extends through an opening on the second arm member of the mounting bracket and an opening on the brake flange, wherein the hollow bolt housing is held in place with respect to the mounting bracket and the brake flange by an engagement means that engages an outside surface of the brake flange.

2. The system of claim 1, wherein the tone ring includes a plurality of reference points disposed thereon.

3. The system of claim 1, wherein the sensor is disposed within the opening of the hollow bolt housing such that an outside end of the sensor extends outwardly from the hollow bolt housing.

4. The system of claim 3, further comprising a plunger, having a spring-loaded plunger pin, that extends through an opening in the first arm member of the mounting bracket and is held in place such that, in a first position, an outside surface of the plunger pin engages an inside surface of the sensor head, thereby holding the sensor in place.

5. The system of claim 4, wherein in the first position, a desired gap is maintained between the outside surface of the sensor and the reference pint.

6. The system of claim 5, wherein in a second position, the plunger pin is displaced from a force applied thereto by the inside surface of the sensor head, and further wherein the tension in the spring causes the plunger pin to push the sensor back into the first position.

7. The system of claim 3, wherein the plunger pin includes a plunger pin body and an adjustment assembly, the adjustment assembly comprising a moveable screw that engages threads disposed within the plunger pin body.

8. The system of claim 7, wherein the adjustment assembly further includes a nut disposed between the moveable screw and the plunger pin body.

9. The system of claim 1 wherein said bolt housing is held in place by a nut that engages an outside surface of the brake flange.

10. An antilock braking system sensor apparatus, the apparatus comprising:

a sensor assembly having a sensor body that extends outwardly from a sensor head;

a generally U-shaped mounting bracket having a substantially parallel pair of arm members extending away from a connecting member, said mounting bracket is fixedly attached to a brake flange and includes a hollow bolt housing through which the sensor body extends, and said bolt housing extends through an opening on one of said arm members of the mounting bracket and an opening on the brake flange and is secured to said mounting bracket and said flange; and

a plunger that is fixedly attached to the mounting bracket, wherein the plunger includes a spring-biased plunger pin that engages the sensor head to hold the sensor in a first position, wherein the spring-biased plunger is configured to cause the sensor to return to the first position in reaction to the sensor being moved into a second position, thereby displacing the plunger pin.

11. An antilock braking system, the system comprising:

a braking assembly, wherein the braking assembly includes a brake flange mounted to an axle;

a wheel hub rotatably coupled to an outside end of the axle;

a tone ring having a reference point disposed thereon, wherein the tone ring is coupled to the wheel hub such that the tone ring rotates with the wheel hub;

a sensor that is moveably coupled to the brake flange using a mounting bracket, wherein the sensor senses the reference point to generate data about a speed associated with the corresponding wheel;

a mounting bracket that is fixedly attached to a brake flange and includes a hollow bolt housing through which the sensor body extends, and said bolt housing extends through an opening on the mounting an opening on the brake flange and is secured to said mounting bracket and said flange; and

a plunger that is fixedly attached to the mounting bracket, wherein the plunger includes a spring-biased plunger pin that engages the sensor head to hold the sensor in a first position, wherein the spring-biased plunger is configured to cause the sensor to return to the first position in reaction to the sensor being moved into a second position, thereby displacing the plunger pin.