GB2242654A - Lifting system for vehicle floor - Google Patents

Lifting system for vehicle floor Download PDF

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Publication number
GB2242654A
GB2242654A GB9003279A GB9003279A GB2242654A GB 2242654 A GB2242654 A GB 2242654A GB 9003279 A GB9003279 A GB 9003279A GB 9003279 A GB9003279 A GB 9003279A GB 2242654 A GB2242654 A GB 2242654A
Authority
GB
United Kingdom
Prior art keywords
hydraulic ram
inter
slave
master
movement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9003279A
Other versions
GB9003279D0 (en
Inventor
Frederick George Wilson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB9003279A priority Critical patent/GB2242654A/en
Publication of GB9003279D0 publication Critical patent/GB9003279D0/en
Publication of GB2242654A publication Critical patent/GB2242654A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B62D25/2054—Load carrying floors for commercial vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/02—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with parallel up-and-down movement of load supporting or containing element

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Abstract

A vertically movable secondary floor 9 for a vehicle or trailer is powered by a master hydraulic ram 1, and a plurality of slave cylinders of similar cylinder bore and rod diameter 2, 3, 4, inter-connected so that piston movement in the master hydraulic ram causes exactly similar movement in each slave hydraulic ram. A bypass system of inter-connected pipes and valves enables individual adjustment of the piston rod of each hydraulic ram. <IMAGE>

Description

MOVING FLOOR TRAILER This invention relates to vehicles and trailers with a vertically moving secondary floor.
Vertically moving additional floors are well known in vehicles and trailers and are of particular benefit for carrying products of different heights and to carry two layers of product which cannot be stacked upon one another.
Existing methods of elevating the floor are diverse and usually complicated.
Is well known to move the floor by 4 screved members which are synchronized in movement by inter-connecting chains or similar.
It is also well known to elevate and lower the floor by hydraulic rams, however it is difficult to equalise the flow of oil to each hydraulic ram, and therefore means have to be provided for frequent adjustment.
This invention relates to providing a simple means for elevating and lowering a secondary floor in a trailer or vehicle, characterised in that fluid power is supplied to a master hydraulic ram with a plurality of additional slave hydraulic rams tif the same cylinder bore and rod diameter, inter-connected so that movement in the piston rod of the master cylinder produces exactly similar piston movement in each of the slave cylinders.
For equal movement, the hydraulic rams should have exactly similar bore dimensions and the piston rods should have exactly similar diameters. This can be readily achieved by manufacturing the hydraulic rams from one piece of tube, and the rods from one length of bar.
A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which Fig 1 shows a side elevation of a low frame trailer with a movable floor 9 in a raised and lowered 9a position.
Fig. 2 Shows a floor with a typical mounting arrangement of the hydraulic rams with the inter-connecting pipework, and the pipework and valves for adjusting each individual hydraulic ram.
In a preferred embodiment hydraulic ram 1, is mounted on the permanent floor 11 of the vehicle or trailer vith the piston rod connected to the movable floor 9.
A hydraulic Ram 2, is mounted from a position on body structure with the piston extending downwards and connected to the movable floor. A further hydraulic ram 3 is mounted and connected similar to hydraulic ram 1 at another position on the movable floor, and a further hydraulic ram is mounted similar to hydraulic ram 2 at another position of the movable floor.
Further hydraulic rams may be added similarly mounted if required.
Fluid pressure from the power source 10, may preferably be connected to the full bore side of hydraulic ram number 1.
Inter-connecting pipes are fitted between the annular sides of the hydraulic rams number 1 and 2.
Inter-connecting pipes are also fitted between the full bore sides of hydraulic ram number 2 and 3. The annular sides of hydraulic rams number 3, and 4 are inter-connected.
The invention is further characterised in the means of equalising the position of the piston. A bypass system of pipes and valves enables the piston rod of the master hydraulic ram 1 to be correctly positioned then locked by isolating the oil supply and diverting the oil supply to the bypass system. All of the hydraulic rams can be adjusted and isolated progressively.
In operation the hydraulic rams are filled with oil, both on the full bore and annular sides of the ram seal.
For levelling, the floor is located at a chosen position.
A bypass pipe 12, is fitted to the pressure line at hydraulic ram 1, with a shut off valve 5, to hydraulic ram 1.
This valve 5 is closed, locking the hydraulic ram 1 in position.
Valve 6 is then opened.
By applying or removing pressure, hydraulic rams 2, 3 and 4 can be raised or lovered in synchronism.
then the piston rod of hydraulic ram 2 is at the correct height, shut off valve 6 is closed to lock it in position.
Hydraulic ram 3 is then positioned and locked by valve 7 with the bypass pipe connected only to hydraulic ram 4.
Hydraulic ram 4 is positioned and locked by valve 8.
Valves 6, 7 and 8 are firmly closed when adjustment is complete, and valve 5 i.- opened for normal operation.
It is preferred that a needle type valve is fitted to give fine control while adjusting hydraulic rams 2, 3 and 4.

Claims (2)

1. A vertically moving floor for a vehicle or trailer where lifting means are provided by supplying liquid pressure to a master hydraulic ram, inter-connected by pipework to a plurality of slave hydraulic rams of the same cylinder bore and piston rod diameter, so that piston movement in the master hydraulic ram produces exactly similar movement in each slave hydraulic ram.
2. An adjustment system for positioning the piston rod of a master cylinder inter-connected as in Claim 1. to slave cylinders with a bypass system where in each cylinder is individually adjusted and locked, progressively until all cylinders are at the correct position.
GB9003279A 1990-02-14 1990-02-14 Lifting system for vehicle floor Withdrawn GB2242654A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9003279A GB2242654A (en) 1990-02-14 1990-02-14 Lifting system for vehicle floor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9003279A GB2242654A (en) 1990-02-14 1990-02-14 Lifting system for vehicle floor

Publications (2)

Publication Number Publication Date
GB9003279D0 GB9003279D0 (en) 1990-04-11
GB2242654A true GB2242654A (en) 1991-10-09

Family

ID=10670936

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9003279A Withdrawn GB2242654A (en) 1990-02-14 1990-02-14 Lifting system for vehicle floor

Country Status (1)

Country Link
GB (1) GB2242654A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2253377A (en) * 1991-03-04 1992-09-09 Carntyne Transport Co Transport vehicles
DE9210242U1 (en) * 1992-08-03 1992-10-15 Franz Schlüter GmbH, 4600 Dortmund Lifting device
US5443350A (en) * 1993-02-10 1995-08-22 Wilson; Frederick G. Goods vehicle or a trailer for a goods vehicle
EP2199150A1 (en) * 2008-12-19 2010-06-23 Getrex Special Products B.V. Transporting unit suitable for carrying vehicular and non-vehicular cargo
EP2946970A1 (en) * 2014-05-21 2015-11-25 Pris-Mag S.r.l. Truck provided with an apparatus for moving bodies
GB2555792A (en) * 2016-11-08 2018-05-16 Tiger Trailers Ltd Lifting mechanism for a double-deck container for transportation of goods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB913426A (en) * 1961-07-10 1962-12-19 Samuel Max Bader Improvements in or relating to truck bodies
GB1452249A (en) * 1974-08-02 1976-10-13 Franchin Di Giuliano Franchin Lifting device
GB1458350A (en) * 1972-09-08 1976-12-15 Mccallum R Hydraulic lifting system
WO1988006108A1 (en) * 1987-02-21 1988-08-25 Frederick George Wilson Improved lift platform for road vehicles and trailers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB913426A (en) * 1961-07-10 1962-12-19 Samuel Max Bader Improvements in or relating to truck bodies
GB1458350A (en) * 1972-09-08 1976-12-15 Mccallum R Hydraulic lifting system
GB1452249A (en) * 1974-08-02 1976-10-13 Franchin Di Giuliano Franchin Lifting device
WO1988006108A1 (en) * 1987-02-21 1988-08-25 Frederick George Wilson Improved lift platform for road vehicles and trailers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2253377A (en) * 1991-03-04 1992-09-09 Carntyne Transport Co Transport vehicles
GB2253377B (en) * 1991-03-04 1995-07-05 Carntyne Transport Co Transport vehicles
DE9210242U1 (en) * 1992-08-03 1992-10-15 Franz Schlüter GmbH, 4600 Dortmund Lifting device
US5443350A (en) * 1993-02-10 1995-08-22 Wilson; Frederick G. Goods vehicle or a trailer for a goods vehicle
EP2199150A1 (en) * 2008-12-19 2010-06-23 Getrex Special Products B.V. Transporting unit suitable for carrying vehicular and non-vehicular cargo
EP2946970A1 (en) * 2014-05-21 2015-11-25 Pris-Mag S.r.l. Truck provided with an apparatus for moving bodies
GB2555792A (en) * 2016-11-08 2018-05-16 Tiger Trailers Ltd Lifting mechanism for a double-deck container for transportation of goods

Also Published As

Publication number Publication date
GB9003279D0 (en) 1990-04-11

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)