GB898399A - Disk brake - Google Patents

Abstract

898,399. Combined disc and band brakes. BENDIX CORPORATION. Nov. 25, 1958, No. 37969/58. Class 103 (1). A disc brake comprises a pair of discs 28, engageable with spaced flat surfaces of a casing 10, 12 14 by cam means interposed between a disc member 38 and each of discs 28 upon a slight angular movement between discs 28 and member 38 when a brake band engages the periphery of the member 38 or discs 28. The brake band 62, 63 is tightened on to the rim 60 of member 38 causing balls or rollers 48 to move into the shallower parts of complimentary conical recesses 44, 34 in member 38 and discs 28 respectively, to axially move the discs 28, splined to shaft 20, against the fixed casing 10, 12, 14. The discs 28 are biased to the release position by springs 50 and are prevented from relative rotation by pins 52 which pass through slots 54 in member 38 to permit limited rotation of member 38 relative to discs 28, the pins 52 and split rings 42 in grooves 26 in shaft 20, supporting the member 38 clear of the shaft. The recesses 34, 44 may be formed in the discs 28 and member 38 or in hardened inserts 36, 46 respectively. The ends of the band 62, 63 are pivoted to actuating toggle linkage 72, 78, 82, 88 by pins 64 carried by shanks 94 screwed into sleeves 98 slidably mounted in casing 14, the outward movement being limited by a head 100 and spring washers 102. On actuation, the band moves with member 38 until one head 100 abuts casing 14, the outward movement of the applying linkage being transmitted to the opposite band and, the corresponding sleeve 98 sliding inwardly of the casing. A lock-nut 96 on the shank 94 is used to adjust the band clearance of rim 60.