Detectable indicia are provided on the interior circumferential rim of the brake hub-drum adjacent to, and spaced apart from, the backing plate of the brake. A sensor is mounted on the backing plate to detect wheel speed and/or other operating conditions detectable from the motion and/or relative location or condition of those indicia. The number of indicia used and the indicia spacing along the interior circumferential rim is selected as needed for a given type of sensor and/or a given application. In the case of a speed sensor, the indicia can be a series of notches in the rim along the entire interior circumferential rim, resembling a series of teeth into that rim. The width of those teeth can be formed wide enough to accommodate movement of the hub-drum relative to the backing plate and/or the sensor, without loss of system functionality, according to the sensing tolerances of a given sensor being used in a given application.

A brake component mounting structure for a thin-wall axle of a heavy-duty vehicle including a mounting plate and a brake component bracket. The brake component bracket is attached to and extends from the mounting plate. The mounting plate has at least one continuous edge attached by a continuous weld to the axle.

A drum brake apparatus may include: a housing; a main braking part installed at one side of the housing, and driven by hydraulic pressure to pressurize shoes during main braking; and a parking braking part installed at the other side of the housing, and driven by an electromotive force to pressurize the shoes during parking braking.

An axle and wheel end assembly includes a tubular axle housing with an annular end surface. The axle and wheel end assembly also includes a spindle with an annular end surface welded to the annular end surface of the tubular axle housing at an attachment periphery. The axle and wheel end assembly further includes reinforcing structure fixed to the tubular axle housing and spindle. The reinforcing structure is located to encompass at least a portion of the attachment periphery.

A drum brake with a carrier, a deformation sensor, and at least one brake shoe. The carrier is connected to a supporting bearing for the at least one brake shoe. The deformation sensor is designed to determine a deformation of the carrier. A brake system includes at least one such drum brake, and a vehicle with such a brake system or with at least one such drum brake.

An electric parking brake actuator mounting assembly includes a brake backplate of a drum brake, having a rear surface opposite to a front surface configured to be facing a brake drum when the brake backplate is mounted on a motor vehicle, wherein the rear surface of the brake backplate includes a support base configured to receive a pull spindle of an electromechanical actuator, a supporting bracket including at least one coupling plate, configured to be attached to the rear surface of the brake backplate, and an actuator mounting surface configured to be coupled to and support the electromechanical actuator, wherein the actuator mounting surface includes a spindle seat, configured to receive the pull spindle of the electromechanical actuator, and a pin lock seat, configured to receive and lock an engagement pin of the electromechanical actuator.

A knuckle for a heavy-duty vehicle self-steering axle/suspension system that includes integrally formed structure for mounting components of a drum brake system. The knuckle includes a spindle that is welded directly to the knuckle and a discrete tie rod arm bolted to the knuckle.

A heavy-duty vehicle brake hardware mounting component that includes an integrated axle vent system and optional air supply line connector. The brake hardware mounting component includes a body with a central opening disposed around and rigidly attached to an axle of the vehicle. An annular groove is formed within the central opening and is in fluid communication with an axle opening. The air supply line connector is attached within an opening formed in the body and extends through the groove and into the axle opening, and enables attachment of and fluid communication between components of a tire inflation system within the axle and an external air source. Pressurized air from within the axle can flow through the axle opening, around the air supply line connector, through the annular groove, through a check valve in fluid communication with the groove, and to atmosphere to relieve air pressure build-up within the axle.

An axle assembly having a unitary trunnion bracket, an axle, and a support bracket. The unitary trunnion bracket may include an axle interface portion and a bracket interface portion. The bracket interface portion may extend from the axle interface portion. The axle may engage the axle interface portion. The support bracket may engage the bracket interface portion.

An axle system includes an axle stub, a first connecting section and a second connecting section, wherein the axle stub is embodied on its outer side so as to be essentially rotationally symmetrical about a stub axis and has two ducts which extend parallel to the stub axis in certain regions, wherein the connecting sections lie in a connecting plane which is oriented orthogonally with respect to the stub axis, wherein the axle stub has an attachment region for securing a brake carrier which extends parallel to the connecting plane.