CS204659B1 - Gearing device of the four-shaft five-gear motorcycle gearbox - Google Patents

Description

BACKGROUND OF THE INVENTION The present invention relates to a five-speed gearbox for motorcycles and other motor vehicles comprising a drive shaft, a coaxial drive shaft thereof, a countershaft shaft, a fifth-gear shaft and gears comprising a flat rotary slide with guide grooves automatu.

There are known shifting devices of five-speed gearboxes with two forks controlled by two guide grooves in the shifting link, then shifting devices with three or four guiding forks, where each fork has its own groove in the shifting background.

The disadvantage of the shifting devices of two- and three-shaft five-speed gearboxes used so far is the considerable construction width. The incense burner with multiple shifting forks operated by separate grooves is complex and disadvantageous. The dual-shift shifting device for single-, two- and three-shaft transmissions is unreliable as it is not guaranteed to shift the fork into position.

The aforementioned drawbacks are overcome by the device according to the invention, which is based on the fact that the flat rotary link is provided with two guide grooves for three shifting forks, one shifting fork being connected to the flat rotating link by a reducing element.

The solution according to the invention allows the construction of an extremely narrow five-speed gearbox with small outer diameter wheels, of simple construction with the highest possible efficiency. A further advantage of the device according to the invention is an extremely simple shifting device consisting of two shifting forks shifting the wheels on the drive and countershaft and a third fork for the fifth-stage shaft supplemented by a simple reduction element.

The accompanying drawings show an example of a shifting device according to the invention, in which Fig. 1 is a front view and Fig. 2 is a side view of the shifting device.

FIG. 1 is a side view of a four-speed five-speed gear shifting device. The shifting fork 1 of the drive shaft and the shifting fork 2 are slidable on the shifting rod 3 and run with their guide pins 4, 5 into the flat rotary slide 6. The shifting fork 7 of the fifth-stage shaft is connected to the flat rotating slide 6 by a reducing element 8 guide pins 9,

10.

FIG. 2 is a side view of the shifting device. The pivoting plate 6 has two guide grooves 11, 12 in which three guide pins 4, 5, 10 fit.

In operation, the first four stages of the unmarked five-speed gearbox operate as in the conventional three-shaft four-speed gearbox, with the fifth-gear shaft rotating freely. When shifting fifth gear

204859 jg ligjpřVe equipped Neutral and ρθ dálšíffi g0otočení surface of the rotatable wings 6 with p & STIVA the guide pin 10 to VS guide groove 11 rotates the reduction eleMíit 8 L V & dícílfl co · ¹ cheek 9 fitting into the hole 13 and the shift fork 7 ranks Drunk Stapěň. When removing the shifting fork 7 with the complete fifth-stage shaft and the reducing element 8, it can be twisted in the shifting device as a four-stage.

Claims (1)

A four-speed five-speed gearbox for motorcycles and other motor vehicles consisting of a drive shaft, a coaxial driven shaft, a countershaft, a fifth-gear shaft and a gearwheel consisting of a flat rotary slide with guiding grooves of the three sliding forks. characterized in that the flat rotary link (6) is provided with two guide grooves (11, 12) for three gear shifters (1, 2, 7), wherein one gear fork (7) is connected to the flat rotary control (6). three-tenth (8).