DE29807131U1 - Transport bike - Google Patents

Description

Transport bike
State of the art

Transport bikes of conventional design have various disadvantages, some of which occur individually or in different combinations:

1. The _loading unit is firmly connected to the frame, which gives the vehicle a fixed, considerable width, making driving in heavy traffic difficult.

2. The loading unit is limited at the sides, which defines the dimensions of the possible transported goods and thus severely limits the loading options.

3. The loading centre of gravity is very high, which severely affects the balance and therefore the maneuverability when loaded.

4. Transport bikes with a low load centre of gravity are very long and difficult to manoeuvre, as the load unit is located between the front and rear wheels.

5. Multi-track bicycles (e.g. tricycles) are not very suitable for road traffic due to their width, as they are so wide that the use of cycle paths is only possible to a limited extent.

6. The load must be secured with third-party means such as lashing straps or tensioning rubbers.

problem

The invention specified in the generic term and the subclaims is based on the problem of constructing a means of transport based on the classic bicycle drive, which fulfils several functions and is suitable for everyday use and functional. Optimal transport properties seem to be in contradiction with suitability for everyday use, since a low loading centre of gravity has so far resulted in an unacceptable overall length.

Furthermore, the most diverse transport properties possible should be ensured by means of appropriate accessories, without complicated installation and conversion or the use of tools being necessary.

Transport bike

Solution:

The transport bike we have developed is basically designed as a single-track bike with two wheels so that it can be used as a maneuverable and therefore everyday means of transport in inner-city traffic without any problems. By changing the conventional "two-dimensional" frame structure, a support frame (3) with a low, backward-inclined center of gravity and a mounting frame (13) that is at a right angle to it is created in the front area of the transport bike. There are mounting options for various accessories on this frame.

Without accessories, the bike is just as wide as a conventional bike and therefore serves as a pure means of transport for one person.

For the transport of loads, the use of appropriate accessories is required which are attached without tools using the socket unit (4) described in the first sub-claim on the support frame or the two welded bolt pairs (14a/b) on the attachment frame (13).

The standard transport accessories consist of two transport plates (10a/b) which enable the transport of large, heavy objects like with a sack barrow. The narrower support plate (10b) is hooked onto the bolt pairs (14a/b) and secured by attaching the support plate (10a) to the support frame (3) using a plug-in sleeve unit (4).

Under the support plate (10a) there are two rotating hand lashing strap winches (16) that allow the load to be secured without the need for third-party means. Other accessories include a plug-on, waterproof aluminum box and a child seat that has been converted to the plug-in sleeve unit (4).

Another application is the combination of two single wheels to form a parallel tandem (Fig. 5) for transporting particularly heavy loads.

Instead of the individual wheel transport plates (10a/b), a large, common contact plate (10d) and a large, common support plate (10c) are applied. In addition, a connecting rod (11) is screwed onto the rear wheel hubs and the cross tube ends (17).

A ball-head mounted rod (12) ensures the synchronous steering movement of the two front wheels.
This simple system allows for a variety of uses as a means of transport.

Transport bike

Advantages:

The transport bike meets a wide range of requirements. It can be used both privately as a shopping, family or touring bike and in the business sector as a trade, trade fair or factory bike. The plug-in system allows for a wide range of variations and almost unlimited expansion options.

In this way, it combines the advantages of a "normal" bicycle with those of a versatile means of transport.
It has a compact design with a favorable charging center.

Design:

The transport bike can be built from any tube material with the appropriate stability.

Steel or aluminum pipes made of different alloys are just as conceivable as plastic pipes.

The design as a welded, soldered or glued frame with or without sleeves is just as applicable to the geometry of the frame as the use of composite materials in the sense of a self-supporting laminate body frame. The size of the wheels can vary for different frame sizes. Basically, the rear drive wheel is larger at 26" to 28" than the front one at 18" to 20".

The equipment of the transport bike can be individually adapted according to customer requirements.
The frame allows the use of available standard components.

Claims (3)

Cargo bike protection claims A) General term 1. Transport bike with multifunctional properties to accommodate different transport units for transporting different objects of various shapes. The transport bike has a conventional drive complex (1) at the rear and a transport complex (2) at the front, which are firmly connected to each other (Fig. 1). The transport bike is characterized by that the transport complex (2) is formed by the extension of the rear wheel fork of the drive complex (1) and thus forms a support frame (3) consisting of two tubes running parallel to each other, which runs diagonally upwards from the bottom bracket position and ends above a smaller front wheel. This support frame (3) also serves to accommodate a movable socket unit (4) with which various transport units can be attached (Fig. 2). B) General term of the 1st sub-claim 2. Movable socket unit (4)(Fig.3)
characterized by that two plates (5a/b) are clamped together by screws between two pipes located at a defined distance (x) (as in the support frame (3)). A socket sleeve (6) with an external thread for receiving a socket bolt (7) is screwed between the lower plate (5b) with two nuts. To attach a specific object, the bolt (7) is first inserted through the hole in the fastening plate (8) of the prepared object and then through the plug-in sleeve (6) and then secured with a standard spring pin and hand-tightened with a third nut on the thread of the plug-in sleeve (6). Transport bike
Protection claims General term of the 2nd sub-claim 3. Frame geometry (9) (Fig. 2) of the bicycle frame of the transport bicycle for variable use of transport units with a reduced load centre of gravity characterized by that the arrangement of the frame tubes provides a variety of transport options by creating a loading level in front of the driver and sloping to the rear with a landing level at a right angle to it. The attachment frame (13) consists of two parallel tubes onto which two pairs of bolts (14a/b) with internal threads are welded for fastening accessories. The support frame (13) also serves to support the handlebar bearing sleeves that hold the handlebar rod. The transfer of the handlebar movement to the front wheel or the front wheel fork occurs indirectly via a steering rod (15) or a steering cable. In addition, the combination of this frame geometry with that under point B) 2. The described socket unit (4) connects two individual wheels to one another to form a parallel tandem by using two common transport plates (10c/d), a connecting rod (11) and a ball-head-mounted rod (12) for synchronizing the steering (Fig. 5).