Wheel speed sensor-mounting structure for drum brake

A wheel speed sensor-mounting structure has a wheel speed sensor mounted on an attachment member fixed to a non-rotatable vehicular portion, such as a torque plate and a dust cover, by way of a fastener accessible from the outside of the drum brake.

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What is claimed is:

1. A wheel speed sensor-mounting structure for a drum brake comprising: a wheel speed sensor disposed inside said drum brake on an attachment member fixed to non-rotatablevehicular portion, said attachment member constituting part of said drum brake, said wheel speed sensor being mounted on said attachment member inside of said drum brake and secured on said attachment member by fastening means from outside of said drumbrake.

2. A wheel speed sensor-mounting structure as defined in claim 1, wherein said wheel speed sensor has an internal thread defined therein, and a mounting hole being provided through said attachment member and a mounting bolt is inserted into saidwheel speed sensor through said mounting hole to be secured to said wheel speed sensor in threading engagement with said internal thread.

3. A wheel speed sensor-mounting structure as defined in claim 1, wherein said wheel speed sensor is formed integrally with a stem extended through said attachment member, and said stem is defined with an external thread, a mounting nut beingsecured to said stem in threading engagement with said external thread.

4. A wheel speed sensor-mounting structure as defined in claim 1, wherein said wheel speed sensor is formed integrally with a stem extending through said attachment member, and a compressed spring is provided between a distal end of said stemand said attachment member.

5. A wheel speed sensor-mounting structure as defined in claim 1, wherein a locking means is disposed between said wheel speed sensor and said attachment member for locking said wheel speed sensor against rotation as well as positioning saidwheel speed sensor.

6. A structure to mount a wheel speed sensor to a drum brake, comprising: a bracket carrying the wheel speed sensor; an attachment member forming a portion of the drum brake; a fastener coupling the bracket to the attachment member on aninside portion of the drum brake, the fastener having a user actuatable portion accessible from outside of said drum brake; and means for preventing rotation between the bracket and the attachment member.

7. The structure of claim 6 wherein the fastener comprises a bolt having a head and a threaded shaft, said attachment member forms a hole sized to receive the threaded shaft of the bolt, and the bracket forms a threaded receptacle sized forthreadedly engagingly receiving the thread of the threaded shaft of the bolt.

8. The structure of claim 6 wherein the fastener comprises a nut having threaded opening, the bracket includes a stem extending therefrom having a thread outside of the stem sized to threadedly engage the threaded opening of the nut, and theattachment member forms a hole sized to receive the threaded stem.

9. The structure of claim 6 wherein the bracket includes a stem extending therefrom having an annular groove about a circumference thereof, the attachment member forms a hole sized to receive the stem of the bracket and the fastener comprises abiasing structure having a cut out sized to engage at least a portion of the annular groove of the stem and a portion engaging a portion of the attachment member.

10. The structure of claim 6 wherein the bracket and the attachment member each include at least one respective pin receptacle laterally offset from a longitudinal axis of the fastener; and further comprising: at least one pin receive by therespective pin receptacles of the bracket and the attachment member.

11. The structure of claim 6 wherein the bracket and the attachment member each include at least one respective engaging edge, the engaging edges laterally offset from a longitudinal axis of the fastener and sized and position to engage oneanother in a plane parallel to the longitudinal axis of the fastener.

12. The structure of claim 6 wherein the attachment member forms a hole for receiving a portion of the fastener, the hole having at least a portion that is non-circular, and a portion of the fastener that is received in the hole having shapethat matches the non-circular portion of the hole.

13. A method of mounting a wheel speed sensor to a drum brake, comprising: coupling a body of the wheel speed sensor to a bracket; positioning the bracket and the wheel speed sensor on an inside of the drum brake; positioning a fastenerthrough at least an hole in an attachment member; and actuating the fastener from outside of the drum brake to secure the bracket to the inside of the drum brake.