GB2209150A - A towing vehicle including a pivotable bar with angle adjustment means - Google Patents
A towing vehicle including a pivotable bar with angle adjustment means Download PDFInfo
- Publication number
- GB2209150A GB2209150A GB8820124A GB8820124A GB2209150A GB 2209150 A GB2209150 A GB 2209150A GB 8820124 A GB8820124 A GB 8820124A GB 8820124 A GB8820124 A GB 8820124A GB 2209150 A GB2209150 A GB 2209150A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tilting bar
- bar
- towing vehicle
- hydraulic
- cylinder
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
- B60D1/42—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for being adjustable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
- B60D1/42—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for being adjustable
- B60D1/46—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for being adjustable vertically
- B60D1/465—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for being adjustable vertically comprising a lifting mechanism, e.g. for coupling while lifting
-
- 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
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
- B60P3/12—Vehicles adapted to transport, to carry or to comprise special loads or objects for salvaging damaged vehicles
- B60P3/125—Vehicles adapted to transport, to carry or to comprise special loads or objects for salvaging damaged vehicles by supporting only part of the vehicle, e.g. front- or rear-axle
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Vehicle Body Suspensions (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
- Jib Cranes (AREA)
- Handcart (AREA)
Abstract
The towing vehicle has a main bar (2) carrying a tilting bar (4) pivotal between a substantially horizontal position and a substantially vertical position by means of a light hydraulic auxiliary cylinder (9). Further, in its substantially horizontal position, the tilting bar (4) can be subjected to angular adjustment with a view to achieving optimal loading conditions. This adjustment is established by a powerful angle adjusting cylinder (8) arranged to adjust and retain the tilting bar (4) in the desired angularly adjusted position. <IMAGE>
Description
A TOWING VEHICLE INCLUDING A PIVOTABLE BAR
The present invention relates to a towing vehicle including a main bar pivotable by hydraulic main cylinders and, mounted on said main bar, a pivotable tilting bar movable by an hydraulic auxiliary cylinder between a substantially vertical raised position and a substantially horizontal rearwardly extended swungout position. Preferably and generally, the tilting bar includes at its rearmost end a crossbar provided with a so-called grill arranged to receive and support a pair of wheels of a car to be towed.
It is the object of the invention to make angular adjustments of the tilting bar possible when in the substantially horizontal position in order to obtain optimal conditions during loading and towing. In practice, this might be considered obtainable by means of a single auxiliary cylinder being so located and having such a stroke that besides moving the unloaded tilting bar from a horizontal into vertical position, it would also be capable of maintaining the loaded substantially horizontal tilting bar in a set adjusted angular position.However, such a strong cylinder having a long stroke would require large installation accommodation or, in other words, stretch across a great height and a great length in the direction of travel and be greatly inconvenient in the towing unit and for the lifting and transporting ability of the whole towing vehicle, that is, owing to an increase of the overhang.
These drawbacks have been remedied by the towing vehicle according to the invention, which is characterized by having separate means for angular adjustment of said tilting bar in its substantially horizontal swung-out position.
According to a preferred embodiment of the invention, the means for angular adjustment of the tilting bar comprise a strong hydraulic angle adjusting cylinder having a short stroke and being arranged to press down upon an abutment surface of an adjusting lever connected to the tilting bar and extending ahead of the pivot shaft thereof on the main bar.
Since the auxiliary cylinder for pivoting the tilting bar between horizontal and vertical position can be made as a fairly light cylinder, and since the angle adjusting cylinder has quite a short stroke, the entire arrangement will require only a small installation accommodation, and the powerful angle adjusting cylinder is capable of performing fine adjustment of the oblique position of the tilting bar in its substantially horizontal position and maintaining the bar in the adjusted position.
According to a preferred arrangement, the hydraulic auxiliary cylinder for moving the tilting bar and angle adjusting cylinder may be connected in parallel in the hydraulic system of the vehicle, which avoids the need to have additional overflow valves and two manoeuvring valves, and the attendant difficult operation and the risk of interruptions caused by a complicated valve construction are avoided.
According to a preferred arrangement, the hydraulic auxiliary cylinder is arranged to act on the tilting bar via a raised base innermost on the tilting bar at a point of action close in front of the pivot shaft of the tilting bar. Accordingly, only a relatively short cylinder stroke is required for moving the tilting bar into vertical position which also contributes to reducing the space required for installation.
Even though one single auxiliary cylinder and one single angle adjusting cylinder would often be sufficient, an auxiliary cylinder and an angle adjusting cylinder could obviously be mounted at both sides of the lifting boom of a powerful vehicle.
A towing vehicle constructed in accordance with the invention will now be described, by way of example only with reference to the accompanying drawings, in which:
Figure 1 shows an embodiment of the towing vehicle according to the invention, and
Figure 2 is a detail showing the mounting of the auxiliary cylinder and the angle adjusting cylinder.
Figure 1 shows a towing vehicle having an auxiliary frame 1 mounted above the main frame of the vehicle and a main bar 2 pivotal about pivot shaft 7, said main bar being movable by means of a hydraulic main cylinder 6. Further, the figure shows a winch 3 located behind an indicated portion of a crane.
At the outermost end of the main bar 2, a tilting bar 4 is pivotally mounted about a transverse axis which allows it to pivot between a substantially horizontal and a substantially vertical position. This pivoting is caused by a light hydraulic auxiliary cylinder 9, one point of action of which is located in the downwardly sloping portion of the main bar 2, and the other point of action of which is located on a raised platform on the rear end of the tilting bar 4 close to the pivot axis thereof in such a manner that with a relatively short stroke the auxiliary cylinder can move the tilting bar 4 between a horizontal and a vertical position.
When the tilting bar 4 is in its substantially horizontal position, the angular position thereof can be exactly adjusted by means of an angle adjusting cylinder 8 situated on the main bar andarrangedto exert a downwardly directed pressure on an abutment surface of an adjusting lever 10 projecting forward in the direction of travel at the side of the pivot shaft remote of the tilting bar. In practice, an angle adjustment of the "horizontal" tilting bar in an order of magnitude of + 100 will be sufficient which means that the powerful angle adjusting cylinder 8 needs only a quite short stroke. By the downwardly directed pressure exerted on the abutment surface by the hydraulic cylinder, the tilting bar will be retained securely in the desired oblique position.
Since the auxiliary cylinder 9 as well as the angle adjusting cylinder 8 have short strokes, the overall height is quite low, and the same goes for the overall length in the travel direction of the vehicle.
The auxiliary cylinder 9 and the angle adjusting cylinder 8 may be in such direct hydraulic connection with each other, that they are working according to the parallel-principle which avoids the need for additional overflow valves and two manoeuvring valves, the operation is made easier, and the risk of interruptions of the operation caused by a complicated valve arrangement is reduced.
The tilting bar 4 as shown is provided, in a well-known manner, with an extension bar 5 which preferably carries, at the outermost end thereof, a crossbar having wheel-supporting members arranged to receive and support a pair of wheels of a car to be towed. In the drawing, various positions of the tilting bar are indicated by dotted lines.
It will be understood that, if desired, a respective auxiliary cylinder and an angle adjusting cylinder may be mounted at each side of the lifting boom.
Claims (6)
1. A towing vehicle including a main bar pivotable by hydraulic main cylinders, and, mounted on said main bar, a pivotable tilting bar movable by an hydraulic auxiliary cylinder between a substantially vertical raised position and a substantially horizontal rearwardly extended swung-out position, characterized by the provision of separate means for angular adjustment of said tilting bar in its substantially horizontal swung-out position.
2. A towing vehicle according to claim 1, characterized by the means for angular adjustment of said tilting bar comprising an hydraulic angle-adjusting cylinder arranged to press down upon an abutment surface of an adjusting lever connected to the tilting bar and extending ahead of the pivot shaft thereof on the main bar.
3. A towing vehicle according to claims 1 and 2, c h a r a c t e r i z e d by said hydraulic auxiliary cylinder (9) for pivoting the tilting bar (4) and said angle adjusting cylinder (8) being connected in parallel in the hydraulic system of the vehicle.
4. A towing vehicle according to claims 1 to 3, c h a r a c t e r i z e d by said hydraulic auxiliary cylinder (9) being arranged to act on the tilting bar (4) at a point of action located close in front of the pivot shaft of the tilting bar.
5. A towing vehicle according to any of the preceding claims, c h a r a c t e r i z e d by a respective auxiliary cylinder and angle-adjusting cylinder being mounted at each side of the vehicle.
6. A towing vehicle substantially as herein described with reference to, and as illustrated by, the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK448087A DK448087A (en) | 1987-08-27 | 1987-08-27 | TOWING TOOL WITH TIP |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8820124D0 GB8820124D0 (en) | 1988-09-28 |
| GB2209150A true GB2209150A (en) | 1989-05-04 |
| GB2209150B GB2209150B (en) | 1991-06-05 |
Family
ID=8133907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8820124A Expired - Fee Related GB2209150B (en) | 1987-08-27 | 1988-08-24 | A towing vehicle including a pivotable bar |
Country Status (6)
| Country | Link |
|---|---|
| DE (1) | DE8810623U1 (en) |
| DK (1) | DK448087A (en) |
| FR (1) | FR2619778B3 (en) |
| GB (1) | GB2209150B (en) |
| NO (1) | NO166850C (en) |
| SE (1) | SE466303B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2238773A (en) * | 1989-12-05 | 1991-06-12 | Eka Ltd | A recovery vehicle |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1407262A (en) * | 1972-06-22 | 1975-09-24 | Ratcliff Tail Lifts Ltd | Vehicle transporting apparatus |
| DE2812750A1 (en) * | 1978-03-23 | 1979-10-04 | Schumacher Karl Heinz | Add-on towing aid fitted to rear of lorry - has servo operated pivoted lifting boom bolted to chassis |
| DE3326573A1 (en) * | 1983-07-23 | 1985-01-31 | Manfred 7321 Hattenhofen Wittich | Recovery crane for breakdown vehicles |
| US4634337A (en) * | 1985-01-10 | 1987-01-06 | Dover Corporation | Integrated wheel lift wrecker |
| FR2594754B1 (en) * | 1985-10-22 | 1988-05-20 | Bennes Marrel | TOWING DEVICE FOR A HEAVY-DUTY FIXED TRUCK |
-
1987
- 1987-08-27 DK DK448087A patent/DK448087A/en not_active Application Discontinuation
-
1988
- 1988-08-22 DE DE8810623U patent/DE8810623U1/en not_active Expired
- 1988-08-24 GB GB8820124A patent/GB2209150B/en not_active Expired - Fee Related
- 1988-08-25 SE SE8802978A patent/SE466303B/en not_active IP Right Cessation
- 1988-08-25 FR FR8811348A patent/FR2619778B3/en not_active Expired
- 1988-08-26 NO NO883831A patent/NO166850C/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2238773A (en) * | 1989-12-05 | 1991-06-12 | Eka Ltd | A recovery vehicle |
| GB2238773B (en) * | 1989-12-05 | 1993-11-17 | Eka Ltd | A recovery vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2209150B (en) | 1991-06-05 |
| DK448087A (en) | 1989-02-28 |
| NO166850C (en) | 1991-09-11 |
| NO166850B (en) | 1991-06-03 |
| GB8820124D0 (en) | 1988-09-28 |
| NO883831D0 (en) | 1988-08-26 |
| FR2619778B3 (en) | 1989-11-17 |
| DE8810623U1 (en) | 1988-10-06 |
| SE8802978L (en) | 1989-02-28 |
| DK448087D0 (en) | 1987-08-27 |
| FR2619778A1 (en) | 1989-03-03 |
| NO883831L (en) | 1989-02-28 |
| SE8802978D0 (en) | 1988-08-25 |
| SE466303B (en) | 1992-01-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19920824 |