DE10240170A1 - Pedal crank with a pedal can be easily removed by exchanging the existing plastic cover for a crank screw connection - Google Patents

Abstract

Pedal crank (1.2) with a pedal can be easily removed by exchanging the existing plastic cover for a crank screw connection (2.1, 2.2). Preferred Features: The chain wheel is connected to a conical sleeve (3.1) and sits tight on the pedal bearing axis (1.1). The right pedal bearing crank is marked with an R to prevent a mix-up (pedal right/left thread).

Description

The reversing pedals currently on the market and swivel pedals have the disadvantages in manufacturing to be complex and therefore costly.

The pedals already developed for Reduction in space e.g. during transportation, could from the above establish not enforce, but mainly because of the stability of the pedals undesirable was reduced.

The purpose of the new construction is a million times proven The pedal pedal system cannot be changed.

( 2 ): The possibility of removing and installing the pedal crank with pedal developed by us fulfills the above requirements.

Easy to disassemble / assemble the pedal crank with pedal, even by a layperson, is made by our Invention, a screw in the pedal crank, and the fixed Seat of the chain wheel through a conical sleeve on the bottom bracket shaft ( Separation of sprocket and pedal crank) reached.

The previous dismantling of the pedal crank , which is only possible with special tools, is carried out as follows:

• 1. Unscrew the plastic cover (dirt protection),
• 2. with an 8 mm Allen key unscrew the fastening screw,
• 3. Use a special puller to remove the crank from the bottom bracket axle pull it off.

When dismantling the crank with Sprocket the chain must be removed and during assembly be reset.

By replacing the plastic cover with the crank screw connection developed by us 2.1 (alternatively 2.2 ) and the separation of the chain wheel with the crank only has to be carried out in one work step.

Crank ( 1 )

Disassembly: By turning to the left (counterclockwise) 2 with an 8 mm Allen key through the crank screw connection 2.1 / 2.2 the crank loosens 1.2 from the conical seat of the bottom bracket axle 1.1 , The fastening screw 1.3 (Series / no change) stays in the crank 1.2 , as well as the crank screw connection 2.1 (Alternatively. 2.2 ). Plus point: no loss of screws.

Assembly: the crank 1.2 is on the conical bottom bracket axis 1.1 put on and fastened by turning it clockwise. When assembling the pedal crank 1.2 tilting of the fastening screw is excluded in our design (no damage to the thread).

Kurbelverschraubung 2.1

The crank fitting 2.1 , which is provided with a hexagon flange, is used for crank with flat mount / bottom bracket crank 1.2 used.

Kurbelverschraubung 2.2

The crank fitting 2.2 with curved round flange, is for curved intake / bottom bracket crank 1.2 to use.

The flange is with two holes for mortise and tenon keys Screwing into the crank.

Material:

The above crank fitting 2.1 (alternatively 2.2 ) is made of stainless steel, to match the thread of the previous plastic cover in the crank.

Sprocket with crank ( 3 )

When removing the crank with sprocket, the sprocket remains with a conical sleeve 3.1 on the bottom bracket axle 1.1 , Disassembly / assembly otherwise as with crank 1.2.

On the previous sprockets a conical sleeve is pressed in during manufacture.

Claims (2)

Easily removable pedal crank with pedal by replacing the previous plastic cover with the crank fitting developed by us 2.1 / 2.2 Separation of the chain wheel from the pedal crank. The sprocket is connected to a conical sleeve and sits firmly on the bottom bracket axle 3.1 , The right bottom bracket crank is marked with an "R" to avoid confusion (pedal right / left thread).