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Tipping Gear or Moving Floor which shall it be ?
Page 83
Page 84
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New Tipping Gears of Greater Efficiency for Less Weight and Bulk. Improvements in Moving.floor Construction Making for Better Operation and Increased
Reliability
DESIGNERS and builders of tipping gear have always in mind the simplification of their products, and in reviewing the latest types it is to be noted that, apart from the fact that definite progress has been made in this direction, weight has been reduced and efficiency increased.
An outstanding example is to be found in the latest B. and E. hydraulic, end-tipping gear, in which considerable attention has been devoted to the pump, with a view to increasing the speed of operation of the ram. Higher fluid pressures are now possible, a feature which makes for much quicker tipping. An important point is that a reduction in weight has been achieved as compared with previous models of similar capacity.
Bromilow and Edwards, Ltd., the maker of this new mechanism, is responsible also for Wood Hoists with wooden and steel bodies, and the Principality moving floor. An interesting application of hydraulic power is to be found in the tower-wagon superstructures produced by this company.
A gear designed to cover a range of from 2 tons to 7 tons is found in the Spenborough inclined-type, hydraulic end-tipping mechanism. Being located below the level of the chassis frame, low loading is provided for. The time taken to tip a load is 15 seconds.
Another well-known maker of tipping gears is Anthony Hoists. Ltd., a concern which produces both slant-type, hydraulic-ram gears and vertical, telescopic hoists. In the one case the gear is located beneath the body, and in the other, between the front end of the body and the driver's cab. An optional feature, with these gears, is an automatic shaker which comes into action at the end of the tip.
A hand-operated hydratilic gear weighing 98 lb. is the Weston Minor, made by Sunsaloon Bodies, Ltd. The design is such that it can be fitted in two hours; its capacity is from 30 cwt. to 2 tons. A more powerful model, weighing If cwt., is found in the Weston powerdriven, hydraulic, end-tipping gear. This has a direct-drive pump, intermediate driving gear thus being eliminated.
William E. Cary, Ltd., is responsible for end-tipping, screw gears for hand or power operation. It also markets a hydraulic-type tipping gear, arranged for hand operation. This mechanism can be fitted without the necessity of drilling the chassis frame, and can deal with loads up to 4 tons.
A neat and simple form of hand-operated, screw gear for end tipping is made by Tuke and Bell, Ltd. This gear serves to propel the body rearwards until a stage is reached when it tips by gravity. Heavy loads are easily managed by one man. One of the outstanding products of the Eagle Engineering Co., Ltd., is its moving-floor body in which the floor is in the form of an endless belt, mounted on a series of ballbearing rollers. It is designed for hand operation. Another interesting type of vehicle body is that designed for refuse collection. As well as being an end-tipper, the load is also compressed, hydraulic gear being used for both operations. A steel-type of moving floor is made by Transport Engineering, Ltd., a power-driven gearbox with dog clutches serving to operate it, either for loading or unloading. This concern also makes a rubber moving floor, in which the same principle of operation is employed.
The moving floors built by Dennis Bros., Ltd., are the result of extensive experience of municipal requirements and 130 Dennis refuse-collection vehicles are so equipped. Floor stretch, which is caused by the floor being directly attached to the winding gear, is avoided in the Dennis design by linking the gear direct to the barrier to form an all-metal transmission. The floor proper is mounted on steel rollers, provided with ,oil-less bushes, and is subjected to only vertical load pressures. A small point, but one which is of practical value, is that the tailboard has remote control, enabling the vehicle to be fully backed over the tip.
A usual capacity for machines of this class is 15 cubic yds., but larger sizes are by no means infrequent. An illustration on this page shows a Dennis refuse-collection vehicle, with moving-floor body, of a measured capacity of 22 cubic yds.
Shelvoke and Drewry, Ltd., maker of the S.D. Freighter, is responsible for both hydraulic tipping gear and a rubberized-fabric-type of moving floor. The framing of the floor is built up of steel sections to which are attached long steel rollers.carrying ball bearings. The drive to the belt is duplicated on each side of the floor and, in consequence,
there is no tendency for an uneven side-pull to develop. In this concern's tipping gear is found an example of mechanism employing a four-cylindered pump. The gear will take a body to its full tipping height in approximately 20 seconds.
As it is possible only to give a brief outline of some of the more important pieces of equipment produced, a list of concerns responsible for all types of tipping gear and moving floors is given, so that, if desired, more detailed information can be obtained from the makers.
Tipping Gears,
Anthony Hoists. Ltd., Minerva Works, Minerva Road, London, ls .W.10. Bromilow and Edwards, Ltd., Foundry Street, Bolton, Lancs. William E. Cary. Ltd., Red Bank and Adeline Street, Manchester, 4. Eagle Engineering Co., Ltd., Eagle Works, Warwick. Shelvoke and Drewry, Ltd., Letchworth, Herts. Spenborough Engineering Co., Ltd., Valley Works, Heckmondwike. Sunealoon Bodies, Ltd., Weston Works, Weston Lane, Greet. Birmingham. Tuke and Bell, Ltd., Carlton Engineering Works, Lichfield. Wood Hoists, Ltd., Foundry Street, Bolton, Lanes.
Moving Floors.
Bromilow and Edwards, Ltd., Foundry Street. Bolton, Lancs. Dennis Bros., Ltd., Guildford. Eagle Engineering Co., Ltd., Eagle Works, Warwick. Shelvoke and Drewry, Ltd., Letchworth, Herts. Traneport Engineering, Ltd., 561, Old Kent Road, S.E.1.