GB2139179A - Improvements in trailers - Google Patents
Improvements in trailers Download PDFInfo
- 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- Withdrawn
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
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 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.
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)
| 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)
| 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 |
| GB1466113A (en) * | 1975-04-28 | 1977-03-02 | Weeks Trailers Ltd | Self-loading trailers |
| GB1466214A (en) * | 1974-03-15 | 1977-03-02 | Berglund K | Transport vehicle |
| 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 |
-
1984
- 1984-04-24 GB GB08410472A patent/GB2139179A/en not_active Withdrawn
Patent Citations (6)
| 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)
| 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) |