WHEEL SPEED SENSOR

• US 3,769,534 A
• Filed: 06/16/1972
• Issued: 10/30/1973
• Est. Priority Date: 06/16/1972
• Status: Expired due to Term

• Current Assignee: Charles G. Wright, Richard C. Wroblewski
• Original Assignee: Charles G. Wright, Richard C. Wroblewski
• Inventors: Wroblewski, Richard C., Wright, Charles G.
• Primary Examiner(s): Duggan, D. F.
• Application Number:
  US05/263,687
• Time in Patent Office: 501 Days
• Field of Search: 310/168,155,169,151
• US Class Current: 310/168
• CPC Class Codes: B60T 8/329 Systems characterised by their speed sensor arrangements
• CPC Class Codes: G01P 3/443 mounted in bearings bearings F16C
• CPC Class Codes: G01P 3/488 delivered by variable reluctance detectors

Abstract

A self-adjusting wheel speed sensor mechanism including a magnetic sensor and rotor on a vehicle axle and wheel, the sensor and rotor being automatically adjusted to a predetermined relationship as the wheel is mounted on the axle.

Claims

1. A wheel speed sensor assembly for installation in association with a wheel rotatably mounted on an axle comprising a ring member having discontinuities on one radial face, said ring member being adapted to be connected to said wheel for rotation therewith with said discontinuities facing axially inwardly, a magnetic sensing assembly, and mounting means operatively securing said magnetic sensing assembly on said axle and permitting axial movement of said sensing assembly both outwardly and inwardly along said axle whereby said sensing assembly is automatically adjusted in predetermined relation with respect to said radial face of said ring in response to axial movement of said ring relative to said axle.

2. The assembly as defined in claim 1, said mounting means including spring means permitting axial displacement of said sensing assembly and biasing said sensing assembly toward said one radial face of said ring member.

3. The assembly as defined in cLaim 1, said mounting means including bracket means connected to said axle, at least one mounting pin connected to said sensing assembly and axially slidably mounted on said bracket means, and spring means on said bracket means for biasing said sensing assembly toward said one radial face of said ring member.

4. The assembly as defined in claim 1, wherein a layer of dielectric material is provided on at least a portion of the radial surface of said sensing assembly which faces said one radial face of said ring member, said layer of dielectric material being engaged by said one radial face of said ring member when the wheel is mounted on the axle.

5. The assembly as defined in claim 1, comprising stationary shield means positioned adjacent to said sensing assembly.

6. The assembly as defined in claim 1, comprising annular retainer means for connecting said ring member to said wheel.

7. A wheel speed sensor assembly for installation in association with a wheel rotatably mounted on an axle comprising a ring member having discontinuities on one radial face and being adapted to be connected to said wheel for rotation therewith with said discontinuities facing inwardly, a self-adjusting magnetic sensing assembly, means for mounting said magnetic sensing assembly on said axle, said mounting means permitting axial displacement of said sensing assembly both outwardly and inwardly along said axle and including spring means for biasing said sensing assembly toward said one radial face of said ring member, and a layer of dielectric material on at least a portion of the radial surface of said sensing assembly which faces said one radial face on said ring member, said layer of dielectric material being engaged by said one radial face of said ring member to cause said sensing assembly to be automatically axially adjusted with respect to said ring member in response to axial movement of said ring relative to said axle.

8. The assembly as defined in claim 7, comprising shield means positioned adjacent said sensing assembly.