Developments in Trailer Manufacture
Page 58
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PR1NGS without shackles or pins, tubular axles aligned by radius rods, and 6-in.-wide brake shoes are amongst the features of a range of semitrailers now being built in this country by York Trailer Co., Ltd., Summit Works, Burnley.
The two radius rods which maintain axle alignment, irrespective of spring deflection, are rubber bushed, which reduces the need for lubrication. One of these rods is provided with a means for adjustment through which the axle can be moved backwards or forwards by small increments.
The semi-elliptic springs are mounted on slipper blocks so that spring deflection has no effect on axle alignment. A tubular axle is used and the wheel spindles are integral with it.
Brake shoes are 6 in. wide on the 12arid 16-ton machines. They are camoperated and provide 364 sq, in, of braking surface.
Standardization has been studied in the design of York trailers and throughout the range of 10-16-ton models many items are interchangeable. In the case of the 12-tonner and the tandem-axle maximum-load machine, all axle parts, springs, spring seats, radius rods, hanger brackets and brake parts are identical.
Four springs are used in the maxi mom-load model, the rear of each spring 2 being connected to a light, pressed-steel rocker beam. The only points needing lubrication on the York tandem bogie are the trunnion bearings.
Support legs are made of light alloy and the screw-and-nut gear operates in an oil bath. The lightweight pressedsteel cross-members of the frame structure are spaced 24 in. apart, and the d'aply tapered outriggers have their top flanges overlapping the main frame.
Operators who have facilities for erecting their own semi-trailers can obtain York components in kit form. The company are able to supply running gear for conversion purposes.
A lightweight semi-trailer that pro vides for the easy loading and unloading • of all types of Wheeled vehicle has been built by Faulkner Bros. (Speke), Ltd., Victory Works, Woodend Avenue, Speke, Liverpool, 19, to the design. of Messrs. Rippon Bros., Liverpool. The platform, which is 23 ft. 11 in long, slopes towards the rear and has its side raves inset from the edge of the platform by 7 in. The purpose of this is to provide guides for the wheels of the balers which the semi-trailer was designed to carry.
As the rear-end of the platform is only 34 in. from the ground, comparatively short loading ramps can be used to give an easy run-up. Two Ezilode winches are fitted at the front-end of the platform.