Thrust Pads Lengthen Worm Life

26th September 1958, Page 121

26th September 1958

Page 121

Page 121, 26th September 1958 — Thrust Pads Lengthen Worm Life

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BY the use of thrust pads, each about 5 in. long and 11 in. deep, held in position on each side of the worm wheel, Leyland Motors, Ltd., claim, in a statement issued on Tuesday, to have greatly increased the life of worm drives employed for many of their vehicles. In an orthodox design of worm drive, the spiral action tends to impart a twist to the worm wheel under full torque which displaces the teeth from true mesh, even when stiff bearings are used. With the Leyland modification, the twisting tendency is counteracted by the pads, which support the wheel at the spot where the action originates. By removing the cause of distortion, the life of the assembly is enhanced. When full torque is applied through the axle, a large proportion of the side thrust on the wheel is taken by the pads, ensuring that the teeth stay in correct mesh. Each pad is adjusted by two large screws to provide a clearance of 0.002 in. between the pad and the worm wheel. Thrust pads of this type will be fitted in future to Worldmaster and heavy goods models, including the new Buffalo.

NEW CHAUSSON MODELS FOR PARIS SHOW

FIVE new Chausson models are to appear at the Paris Show, to be held from October 2-12. They are the A.H.H. single-deck bus with His pano-Suiza 150b.h.p. engine, which has been specially produced for Barcelona, and four coaches. One of the coaches—the A.S.H. —is a 60-seater. The other• three are smaller and are designed for fast longdistance touring. Sixty-seven commercial-vehicle manufacturers will be represented at the Show, which will be reported in The Commercial Motor on October 10.

Chausson have a stand (78) at the Commercial Motor Show in London.

Thrust Pads Lengthen Worm Life

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