GB2139179A - Improvements in trailers - Google Patents

Improvements in trailers Download PDF

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Publication number
GB2139179A
GB2139179A GB08410472A GB8410472A GB2139179A GB 2139179 A GB2139179 A GB 2139179A GB 08410472 A GB08410472 A GB 08410472A GB 8410472 A GB8410472 A GB 8410472A GB 2139179 A GB2139179 A GB 2139179A
Authority
GB
United Kingdom
Prior art keywords
receiving platform
load receiving
wheels
trailer
wheel
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Withdrawn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
GB08410472A
Other versions
GB8410472D0 (en
Inventor
Michael Ernest Smethurst
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
Priority claimed from GB838310681A external-priority patent/GB8310681D0/en
Application filed by Individual filed Critical Individual
Priority to GB08410472A priority Critical patent/GB2139179A/en
Publication of GB8410472D0 publication Critical patent/GB8410472D0/en
Publication of GB2139179A publication Critical patent/GB2139179A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B60P1/025—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 with a loading platform inside the wheels of a same axle and being lowerable below the axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D53/00—Tractor-trailer combinations; Road trains
    • B62D53/04—Tractor-trailer combinations; Road trains comprising a vehicle carrying an essential part of the other vehicle's load by having supporting means for the front or rear part of the other vehicle
    • B62D53/06—Semi-trailers
    • B62D53/061—Semi-trailers of flat bed or low loader type or fitted with swan necks
    • B62D53/062—Semi-trailers of flat bed or low loader type or fitted with swan necks having inclinable, lowerable platforms; Lift bed trailers; Straddle trailers

Abstract

A trailer includes a load receiving platform (2), and at least two wheels (4,5) mounted on wheel mounts (6), the wheel mounts (6) being arranged for movement with respect to the load receiving platform (2) from a first position (Fig. 2) where the wheels (4,5) project downwardly below the load receiving platform (2) to a second position (Fig. 3) where the wheels (4,5) do not project downwardly below the load receiving platform (2). Tow-bar (8) is rigid with member 11, allowing platform (2) to be dropped to ground level as shown by hydraulic cylinder (10) acting on the trapezium linkage. <IMAGE>

Description

SPECIFICATION Improvements in trailers This invention relates to improvements in trailers.
The improvement relates to several forms of trailer including agricultural trailers and breakdown trailers.
According to this invention a trailer includes a load receiving platform, and at least two wheels mounted on wheel mounts, the wheel mounts being arranged for movement with respect to the load receiving platform from a first position where the wheels project downwardly below the load receiving platform to a second position where the wheels do not project downwardly below the load receiving platform.
Thus with the wheels movable with respect to the load receiving platform the relative upward movement of the wheels with respect to the load receiving platform causes the load receiving platform to be lowered to the ground for easy loading. This is especially useful for loading animals or bales of hay or even a broken down vehicle.
The tailer may typically have two wheels only.
However in some cases, in particular for larger trailers or for trailers designed for road use the provision of four wheels is necessary.
Preferably each wheel mount comprises a flat plate pivotally mounted on the edge of the load receiving platform to cause the wheel to move in an upwards or downwards direction.
Preferably the movement of the wheels is effected by a hydraulic cylinder connected to each wheel mounting plate.
Preferably the towbar is also movable so that it can be moved from a towing position where it projects beneath the load receiving platform to a loading position where it does not project below the load receiving platform. Preferably the movement of the towbar is effected by the same means effecting movement of the wheel mounts.
A particularly useful embodiment of this invention makes use of a trapezium linkage to effect this movement.
The wheel mounting plate is pivotally connected to the load receiving platform and is also pivotally connected to a longitudinal rod which extends along the length of the load receiving platform. An end rod is pivotally connected to both the load receiving platform and the longitudinal rod. Thus the line between the pivotal connection of the wheel mount with the load receiving platform and the longitudinal rod, the load receiving platform, the longitudinal rod and the end rod form a trapezium linkage. The wheel mount is connected to a hydraulic cylinder which effects the movement of the wheel mount. The towbar is rigidly connected to the end rod and the angle between them is kept fixed. Thus when the hydraulic cylinder is fully extended the wheel is in its lowered position for transportation and the towbar is also extending below the load receiving platform.
When the hydraulic cylinder is fully retracted the mounting plate is rotated backwards thus moving the wheel to a position where it does not project below the load receiving platform and automatically moving the end rod in the same direction thus pulling the towbar to a position where it clears the ground. The trailer may also have side plates which serve to support any load on the load receiving platform.
Preferably the hydraulic cylinders which control the movement of the wheel mounting plates are connected to a control panel in an auxiliary vehicle which pulls the trailer so that loading of the load receiving platform can be effected from the vehicle pulling the trailer.
On some tailers, in particular those designed for road use there is included a hydraulic pump to control the hydraulic cylinders. The pump typically takes its power from the towing vehicle via the electrical system of the vehicle.
An example of a trailer in accordance with this invention will now be described with reference to the accompanying drawings, in which: Figure 1 is a plan view of a trailer; Figure 2 is a schematic side elevation of the trailer in its first transport position; and Figure 3 is a schematic side elevation of the trailer in its second loading position.
Trailer 1 comprises a flat load receiving platform 2 with a flat base 3. It has two wheels 4 and 5 mounted on mounting plates 6 and 7. Movement of wheel 4 and wheel mount 6 will only be described in detail, movement of wheel 5 being exactly the same. The trailer 1 is towed by means of a towbar 8.
Wheel mount 6 is a triangular plate pivotally mounted on the load receiving platform and pivotally mounted to an auxiliary rod 9. It is also pivotally connected to a hydraulic cylinder 10 which effects movement of the wheel mount and the wheel with respect to the load receiving platform 2. Auxiliary rod 9 is also pivotally connected to an end rod 11 which is pivotally connected to the load receiving platform 2. The twobar 8 is rigidly connected to the end rod 11 and the angle between them is kept constant.
In the trailer's first transport position the hydraulic cylinder 10 is fully extended and the wheel 4 extends below the base 3 of the load receiving platform 2 and freely rotates. The towbar 8 also extends below the base 3 of the load receiving platform for towing.
When the trailer 1 is to be loaded the hydraulic cylinder 10 is fully retracted thus rotating the wheel mount 6 and moving the wheel 4 to a position where it does not extend below the base 3 of the load receiving platform 2. Since end rod 11 is linked to the line between the pivotal connections 12 and 13 by the load receiving platform and the auxiliary rod 9 in a trapezium linkage, it is also rotated backwards thus pulling the towbar 8 upwards and to a position where it clears the ground The base 3 of the load receiving platform is then flat on the ground allowing easy loading of the trailer 1.
The hydraulic cylinder 10 is hydraulically connected to the vehicle pulling the trailer and can be controlled from that vehicle.

Claims (11)

1. A trailer including a load receiving platform, and at leat two wheels mounted on wheel mounts, the wheel mounts being arranged for movement with respect to the load receiving platform from a first position where the wheels project downwardly below the load reeiving platform to a second position where the wheels do not project downwardly below the load receiving platform.
2. A trailer according to claim 1, in which each wheel mount comprises a flat plate pivotally mounted on the edge of the load receiving platform to cause the wheel to move in an upwards or downwards direction.
3. A trailer according to any one of the preceding claims also including a towbarwhich is movable from a towing position where it projects beneath the load receiving platform to a loading position where it does not project below the laod receiving platform.
4. A trailer according to claim 3, in which the movement of the towbar is effected by the same means effecting movement of the wheel mounts.
5. A trailer according to claim 4, in which each wheel mount comprises a flat plate pivotally connected to the load receiving platform, and pivotally connected to a longitudinal rod which extends along the length of the load receiving platform, an end rod is pivotally connected to the load receiving platform and to the longitudinal rod, a hydraulic cylinder is connected to each wheel mount and the towbar is rigidly fixed to the end rod to keep a fixed angle between them, whereby in the fully extended position of the hydraulic cylinder the wheels are in the first position and the towbar is in its towing position and in the retracted position of the hydraulic cylinder the wheels are in their second position and the towbar is in its loading position.
6. Atrailer according to claim 1 or 2, in which the movement of the wheels is effected by a hydraulic cylinder connected to each wheel mount.
7. A trailer according to claim 6, in which the hydraulic cylinders which control the movement of the wheel mounts are connected to a control panel in an auxiliary vehicle which pulls the trailer.
8. A trailer according to claim 6, also including a hydraulic pump coupled to the hydraulic cylinders and to the electrical system of an auxiliary vehicle pulling the trailer.
9. A trailer according to any one of the preceding claims, which also includes side plates which serve to support any load on the load receiving platform.
10. Atrailer according to claim 1 and arranged substantially as herein described.
11. Atrailer arranged substantially as herein described with reference to the accompanying drawings.
GB08410472A 1983-04-20 1984-04-24 Improvements in trailers Withdrawn GB2139179A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08410472A GB2139179A (en) 1983-04-20 1984-04-24 Improvements in trailers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838310681A GB8310681D0 (en) 1983-04-20 1983-04-20 Trailers
GB08410472A GB2139179A (en) 1983-04-20 1984-04-24 Improvements in trailers

Publications (2)

Publication Number Publication Date
GB8410472D0 GB8410472D0 (en) 1984-05-31
GB2139179A true GB2139179A (en) 1984-11-07

Family

ID=26285878

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08410472A Withdrawn GB2139179A (en) 1983-04-20 1984-04-24 Improvements in trailers

Country Status (1)

Country Link
GB (1) GB2139179A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2190349A (en) * 1986-05-08 1987-11-18 Derek Crouch Drop-floor trailer
WO1989009386A1 (en) * 1988-03-31 1989-10-05 Roads & Traffic Authority Of New South Wales Vehicle inspection trailer
FR2679510A1 (en) * 1991-07-22 1993-01-29 Cochet Improvements to trailers for the transportation of agricultural machinery
FR2818607A1 (en) * 2000-12-21 2002-06-28 Fior Rech Et Dev Two-wheeled trailer has wheels on pivoted struts connected to towbar by lever system that allows loading platform to lie flat on ground
GB2436319A (en) * 2006-03-24 2007-09-26 Bradley Doublelock Ltd Trailer with wheels retractable to an inoperative position

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1163183A (en) * 1966-05-05 1969-09-04 Bertil Lennart Sixt Bjoerklund Improvements relating to Load Transport Vehicles
GB1466214A (en) * 1974-03-15 1977-03-02 Berglund K Transport vehicle
GB1466113A (en) * 1975-04-28 1977-03-02 Weeks Trailers Ltd Self-loading trailers
GB1500502A (en) * 1975-04-24 1978-02-08 Parsons C Wheeled trailer
GB2029365A (en) * 1978-07-17 1980-03-19 Cgs Eng Ltd Low Loading Trailer
GB2067970A (en) * 1979-12-18 1981-08-05 Briggs R Trailers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1163183A (en) * 1966-05-05 1969-09-04 Bertil Lennart Sixt Bjoerklund Improvements relating to Load Transport Vehicles
GB1466214A (en) * 1974-03-15 1977-03-02 Berglund K Transport vehicle
GB1500502A (en) * 1975-04-24 1978-02-08 Parsons C Wheeled trailer
GB1466113A (en) * 1975-04-28 1977-03-02 Weeks Trailers Ltd Self-loading trailers
GB2029365A (en) * 1978-07-17 1980-03-19 Cgs Eng Ltd Low Loading Trailer
GB2067970A (en) * 1979-12-18 1981-08-05 Briggs R Trailers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2190349A (en) * 1986-05-08 1987-11-18 Derek Crouch Drop-floor trailer
WO1989009386A1 (en) * 1988-03-31 1989-10-05 Roads & Traffic Authority Of New South Wales Vehicle inspection trailer
FR2679510A1 (en) * 1991-07-22 1993-01-29 Cochet Improvements to trailers for the transportation of agricultural machinery
FR2818607A1 (en) * 2000-12-21 2002-06-28 Fior Rech Et Dev Two-wheeled trailer has wheels on pivoted struts connected to towbar by lever system that allows loading platform to lie flat on ground
GB2436319A (en) * 2006-03-24 2007-09-26 Bradley Doublelock Ltd Trailer with wheels retractable to an inoperative position

Also Published As

Publication number Publication date
GB8410472D0 (en) 1984-05-31

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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)