초록 ▼

A brake assembly comprises (a) a carrier having a bore, and a piston slidable axially in the bore to transmit force of fluid pressure acting on the piston to a brake pad, (b) shaft structure defining an axis and extending axially to transmit auxiliary thrust to the piston, (c) a rotary actuator memb

A brake assembly comprises (a) a carrier having a bore, and a piston slidable axially in the bore to transmit force of fluid pressure acting on the piston to a brake pad, (b) shaft structure defining an axis and extending axially to transmit auxiliary thrust to the piston, (c) a rotary actuator member rotatable about the axis, (d) coupling device responsive to rotation of the member in one direction to effect axial advancement of the shaft structure toward the piston and responsive to rotation of the member in the opposite direction to allow axial retraction of the shaft structure, (e) first wear compensation mechanism subject to adjustment to axially shift the shaft structure in response to fluid pressure produced axial displacement of the piston beyond a predetermined amount, and (f) second wear compensation mechanism subject to adjustment to axially shift the shaft structure in response to rotation of the member beyond a predetermined amount, (g) the first and second compensation mechanisms being operatively interconnected whereby shifting of the shaft structure by one of the compensation mechanisms serves to effect a corresponding compensating adjustment of the other of the wear compensating mechanisms.

대표청구항 ▼

In a brake assembly, the combination comprising (a) a carrier having a bore, and a piston slidable axially in the bore to transmit force of fluid pressure acting on the piston to a brake pad, (b) shaft structure defining an axis and extending axially to transmit auxiliary thrust to the piston, said

In a brake assembly, the combination comprising (a) a carrier having a bore, and a piston slidable axially in the bore to transmit force of fluid pressure acting on the piston to a brake pad, (b) shaft structure defining an axis and extending axially to transmit auxiliary thrust to the piston, said structure including first and second shaft sections having a first lost motion interconnection, (c) a rotary actuator member rotatable about said axis, (d) coupling means responsive to rotation of said member in one direction to effect axial advancement of the shaft structure toward the piston and responsive to rotation of said member in the opposite direction to allow axial retraction of the shaft structure, (e) first wear compensation mechanism subject to adjustment to axially shift the shaft structure in response to fluid pressure produced axial displacement of the piston beyond a predetermined amount, and (f) second wear compensation mechanism subject to rotary adjustment to axially shift the shaft structure in response to rotation of said member beyond a predetermined amount, (g) said first and second compensation mechanisms being operatively interconnected via the shaft sections whereby shifting of the shaft structure by one of said compensation mechanisms serves to effect a corresponding compensating adjustment of the other of said wear compensating mechanisms, (h) the first shaft section being coupled to the first compensating mechanism, and the second shaft section coupled to the second compensating mechanism, the second compensating mechanism including interengageable elements respectively associated with the second shaft section and said rotary actuator member to provide unidirectional rotary coupling which is releasable in response to rotation of said member in said opposite direction, there being a second lost motion connection between the rotary actuator and one of said elements, and (i) said coupling means including a sleeve having threaded engagement with the shaft second section, whereby the sleeve may be displaced axially with the shaft structure to axially advance the shaft structure endwise toward the piston, the shaft second section also being rotatable relative to the sleeve in response to said rotary adjustment of the second wear compensation mechanism, thereby to axially advance the shaft second section relative to said sleeve, to compensate for brake wear.