DE10002492C1 - Boat trailer for motor vehicles has buoyancy bodies at the back, inflated for launch and withdrawal of trailer from water - Google Patents

Abstract

The trailer has a carriage (1), and a boat is held on it via winch and holder at the front, and slip roller pairs at the back. One or more inflatable buoyancy bodies (4A,B,5A,B) in the rear area of the carriage extend under it when inflated. In transportation direction, the bodies are held on horizontal pivot levers (40A,50A) on the plane of the carriage, while in loading/unloading position, they are pivoted down and backwards, and are held by the levers, which are now in vertical position. The buoyancy bodies are connected via a valve (33) to a compressor (3). This is connected to an electric motor, which in turn is connected to the electrical system of the towing vehicle.

Description

The invention relates to a trailer with a movable carriage for transporting a boo tes to hold the bow with a winch on a holder on the front of the carriage is and laterally spaced in the carriage spaced pairs of slip rollers of a keel area is to be kept centered, as is known from US Pat. No. 4,986,571.

From DE 29 48 209 A1 a trailer for transporting a boat is known, the frame menwerk is freely pivotable about an axis and that at least one in the longitudinal direction of the frame extendable frame part, at the rear area of an inflatable float is attachable. When sinking the end of the extendable frame part under the water surface during water, the buoyancy of the float relieves the frame menwerk, so that the bending forces acting on the framework remain relatively low where can be constructed to save weight due to the framework.

US 3 826 391 discloses a trailer for transporting a boat with a mount, below half of which at the end a drum-shaped floating body is rotatably mounted. The drum shaped float makes it easier by placing and rolling on the bank floor Pull out of the water. In the water, the buoyancy of the swimming drum causes that the extendable carriage moves more easily over an uneven or soft surface can be.

It is an object of the invention to a generic trailer with simple means improve that it is easier to slip on stepped, steep or flat banks.

This object is achieved by a trailer according to claim 1.  

Advantageous embodiments are in the subclaims specified.

The carriage is in the back with Floating bodies equipped, their volume by inflation is to be greatly enlarged. In this way it stays Ground clearance for land transport when the volume is low is kept; but the volume becomes slippage enlarged, so that the floor level is approximately reached, whereby when moving back into the water the carriage becomes buoyant, once the boat is unloaded. This allows the then moving forward to overcome obstacles and steps until the wheels have a firm footing on the bank, whereupon the floats can be vented again.

The inflatable floats are each advantageous a central axis of rotation arranged transversely to the carriage lies and variable in height, preferably up and down swiveling, is held on this. This allows the Floating bodies with their entire large diameter under the Lower the carriage, and when touching obstacles, roll them over when the carriage is moved. At the Swiveling downward, the floats are also after pivoted at the rear, which is their supporting function in the rear sloping gun carriage still increased.

Since the boat is submerged when diving into the water from the stern and after being lifted out of the rear slip rollers there is only a little lateral guidance on the bow side Slip rollers. An increased lateral guidance in the immersion area is provided by a further advantageous embodiment, wherein more inflatable rotating floats on the side of the  Mountings are arranged so that they are partially inflated extend above and partly below the carriage.

The lateral floating bodies are preferably conical trained and inflated have a larger rear Diameter on. There the axis of rotation on one Swing linkage on the side.

To a large ratio of the small and large diameter Reaching the float is elastic Material introduced a wrinkle structure, which is in the Inflation almost completely stretches and crease when deflating Fold tightly together.

The floating bodies are preferably inflated with a operated by an electric motor from the electrical system of the towing vehicle Compressor, which is suitably arranged on the carriage and via controllable valves and compressed air hoses with the Hollow shafts of the floating body is connected. Preferably the valves each have three positions, one in the pressure line is connected to the compressed air hose, in the second one is cordoned off and the third one Suction line of the compressor is connected to it, whereby rapid ventilation and the formation of wrinkles are supported becomes.

Advantageous configurations are shown in FIGS. 1 to 4: It shows:

Figure 1 shows a trailer in transport position in side view.

Figure 2 is a plan view of a carriage in the transport position.

Fig. 3, the rear of the carriage in the floating position;

Fig. 4 shows a cross section through a floating body.

In the side view, Fig. 1 shows a trailer with a carriage 1 and an axle with wheels 2 , which is loaded with a boat B, which is held on the bow by means of a winch W on a holder H and the bottom side of the keel with roller pairs R1 spaced one behind the other , R2 is supported centered. There are inflatable floats 4 A, 5 A, 6 A, 7 A on the rear side of the carriage 1 , as is also shown in FIG. 2, two of which extend approximately across the width of the carriage. They are drawn together in folds F and are each held on an axis of rotation 8 on pivoting levers 40 A, 50 A on both sides.

These first two floating bodies 4 A, 5 A arranged at the level of the carriage 1 in the driving state of the trailer are brought down by swiveling down the pivoting levers 40 A, 50 A downwards, into the positions 4 B, 5 B, which are shown in dash-dot lines unfolded up to the considerably larger diameter shown by inflation, so that they reach approximately to the bottom.

The volume of these two inflated, swung-down, rear-side floating bodies 4 B, 5 B is sufficient to hold the empty carriage 1 on the rear side above water when it is held uphill on the front side of the towing vehicle.

The floats 4 B, 5 B each have a length of 1 m and a diameter of 0.5 m, for example.

The two further floating bodies 6 A, 7 A arranged on the side of the carriage 2 are also provided with central shafts 8 , which are held at the rear on the folding and / or pivoting levers 60 B, 70 B and can be swung out laterally and on the front of the carriage 2 with joints 60 A, 70 A are articulated.

The side floats are inflated and shown in plan Fig. 3. They are unfolded in the shape of a truncated cone, extended towards the pivot lever 60 B, 70 B.

The swivel levers 40 A, 50 A, 60 B, 70 B are each provided with notches and struts (not shown) for holding in the two end positions.

FIG. 4 shows a floating body 4 A designed as a bellows with at least eight folds, when inflated it unfolds twice the diameter as the dash-dotted body 4 B is to achieve. An even larger diameter ratio can be achieved with more folds. Inside the float 4 A, 4 B there is a hollow shaft 8 which is connected to the pressure hose 30 via a bearing bush.

In Fig. 1, a compressor 3 is shown, which is connected to the electrical system of the towing vehicle Z and is connected with a suction and a pressure line 31 , 32 to a multi-way valve 33 , which is connected to the pressure hose 30 .

The floats 4 A, 5 A, 6 A, 7 A can be controlled individually or in groups via further valves; this enables us to react appropriately to special bank designs.

Claims (11)

1. Trailer with a movable carriage ( 1 ) for transporting a boat (B), which is to be held with his bow by means of a winch (W) on a holder (H) on the front of the carriage ( 1 ) and spaced one behind the other in the Mount ( 1 ) arranged pairs of slip rollers (R1, R2) must be centered laterally of a keel area, characterized in that in the rear area of the mount ( 1 ) at least one inflatable float ( 4 A, 4 B; 5 A, 5 B) is arranged, which inflates under the mount ( 1 ) it stretches, the floating body ( 4 A, 5 A) being vented in a transport position at the level of the mount ( 1 ) and there on approximately horizontally positioned pivot levers ( 40 A, 50 A) is held and in a loading and unloading position the float ( 4 B, 5 B) is inflated in a position pivoted downwards and downwards and is held there by the approximately vertically positioned pivoting levers ( 40 A, 50 A). 2. Trailer according to claim 1, characterized in that the floating body ( 4 A, 5 A) inflated is approximately cylindrical and on a transverse to the carriage ( 1 ) orient th shaft ( 8 ) rotatable between the pivot levers ( 40 A, 50 A) is stored. 3. Trailer according to claim or 2, characterized in that further inflatable floats ( 6 A, 6 B; 7 A, 7 B) are arranged on the carriage ( 1 ) laterally in the rear area. 4. Trailer according to claim 3, characterized in that the lateral float by ( 6 A, 6 B; 7 A, 7 B) are each rotatably mounted on a shaft ( 8 ). 5. Trailer according to claim 4, characterized in that the shafts ( 8 ) are each articulated in a swivel joint ( 60 A, 70 A) on the mount ( 1 ) and at the other with folding and front swivel levers ( 60 B, 70 B) the carriage ( 1 ) can be extended laterally. 6. Trailer according to claim 5, characterized in that the lateral float by ( 6 B, 7 B) in the inflated state have an approximately frustoconical shape, which widens to the rear-hinged pivot levers ( 60 B, 70 B). 7. Trailer according to one of the preceding claims, characterized in that the floating bodies ( 4 A, 5 A, 6 A, 7 A) individually or in groups, each controlled by a compressed air line ( 30 ) via a valve ( 33 ) with a compressor ( 3 ) are ver bindable, which is connected on the drive side to an electric motor which is to be connected to an electrical system of a towing vehicle. 8. Trailer according to claim 7, characterized in that the compressor ( 3 ) with egg ner pressure and a suction line ( 31 , 32 ) to the valve ( 33 ) is connected, which is to be spent in three different positions and one or the other of the ge lines ( 31 , 32 ) connects to the compressed air line ( 30 ) or blocks it. 9. Trailer according to claim 7 or 8, characterized in that the compressed air line ( 30 ) is a compressed air hose which is connected via a shaft bearing with the shaft formed as a hollow shaft ( 8 ). 10. Trailer according to one of the preceding claims, characterized in that the floating body ( 4 A, 5 A, 6 A, 7 A) is equipped with a fold structure, the fold ten (F) in the vented state approximately radially from the shaft ( 8 ) extend out. 11. Trailer according to claim 10, characterized in that the floating body ( 4 A, 5 A, 6 A, 7 A) has at least eight folds (F) and inflated unfolds approximately twice the diameter than the bellows.