Tail lift

Tail lift

A tail lift is a mechanical device permanently fitted to the back of van or lorry, which is designed to facilitate the materials handling of goods from ground level or a loading dock to the level of the load bed of the vehicle, or vice versa.

The majority of tail lifts are hydraulic or pneumatic in operation, although they can be mechanical, and are controlled by an operator using an electric relay switch.

The use of a tail lift can obviate the need to use machinery such as a forklift truck in order to load heavy items on to a vehicle, or can be used to bridge the difference in height between a loading dock and the vehicle load bed.

The first tail lift system was developed in 1970 by ZEPRO Z-Lyften Produktion AB (now part of HIAB Group),in Sweden.cite web|url=http://www.hiab.com/taillifts|title=Zepro Tail lifts product history|accessdate=2007-06-05]

Tail lifts are available for many sizes of vehicle, from standard vans to articulated lorries, and standard models can lift anywhere up to 2500kg.

Types

There are two key types of tail lift available to operators these are:

Column lifts

Column lifts are often mechanical, although they can be hydraulic or pneumatic. They run on 'tracks' fitted to the rear of the vehicle. From the tracks, a folding platform extends, which can be taken up and down.

Column lifts have the advantage of being able to lift to a higher level than the load bed (and are therefore suitable for loads over more than one level in the truck. [cite web|url=http://www.ratcliff.co.uk/palfinger/16461_EN.pdf|title=Ratcliff Double Tier Lift|accessdate=2007-06-13] They are usually the easiest of the lift types to fit, as they require little structural work.

The disadvantages of column lifts include that the platform is only usually able to operate at a 90° angle from the track, meaning that on uneven surfaces, the lift will not meet the ground properly.

Cantilever lifts

The cantilever lift is the type first developed by Zepro. They operate only on a hydraulic or pneumatic system. The system works by a set of rams attached to the chassis of the vehicle. These rams are on hinges, allowing them to move angle as they expand or contract. By using the rams in sequence, the working platform can either be tilted, or raised and lowered.

Cantilever lifts have the advantage of being able to tilt, which means they can often form a ramp arrangement, which may be more appropriate for some applications. It also means that it can be easier to load or unload on uneven ground.

On some models, the ramp can be tucked away under the load bed of the vehicle, leaving the option of it not being used when at a loading ramp, and giving access and egress for operatives without the need to operate the lift.

References


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • tail lift — noun A mechanical device permanently fitted to the back of a vehicle, designed to facilitate the transfer of goods from ground level onto the vehicle …   Wiktionary

  • tail lift — See brake dive …   Dictionary of automotive terms

  • lift — [1] The action of the rear end of the vehicle to rise during braking. [2] The amount by which a poppet valve rises when opened. See valve lift. [3] The aerodynamic force caused by greater pressure above the car than below it and having the effect …   Dictionary of automotive terms

  • Lift-off oversteer — (also known as snap oversteer, trailing throttle oversteer, throttle off oversteer, or lift throttle oversteer) is a form of oversteer in an automobile that occurs when the vertical load on the tires shifts from the rear to the front quickly due… …   Wikipedia

  • lift — 01. Can you help me [lift] this big box into the truck? 02. Do you want a [lift] downtown? I m heading that way myself. 03. She [lifted] her coffee to her lips, and slowly blew on it. 04. I [lifted] my son onto my shoulders, so he could see over… …   Grammatical examples in English

  • Lift irrigation scheme — Irrigation Schemes mainly comprise canal irrigation and lift irrigation schemes. In such schemes, the most important and yet the most neglected portion is distribution of water. Let us first consider lift irrigation schemes Importance of lift… …   Wikipedia

  • tail — 1) the part of the body posterior to the abdominal cavity, thus including the caudal peduncle and the tail fin 2) the tail fin alone 3) the length of line between the hook and a leger or paternoster 4) to lift a fish by its tail. Also called… …   Dictionary of ichthyology

  • tail up — transitive verb Etymology: tail (I) West : to lift (an animal) out of a bog by the tail; also : to twist the tail as a means of forcing (a benumbed animal) to rise …   Useful english dictionary

  • direct lift control — Using aerodynamic surfaces to provide instantaneous control of the rate of descent without having to change the pitch angle of the aircraft. Direct lift control is obtained by deflecting a flap or similar wing surface while simultaneously… …   Aviation dictionary

  • Cruciform tail — BAe Jetstream 31 with cruciform tail The cruciform tail is an aircraft empennage configuration which, when viewed from the aircraft s front or rear, looks much like a cross. The usual arrangement is to have the horizontal stabilizer intersect the …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”