WO1984003075A1

WO1984003075A1 - Playless support device of a front fork to a motorcycle frame by means of a nut

Info

Publication number: WO1984003075A1
Application number: PCT/DE1983/000026
Authority: WO
Inventors: Emil Schwarz
Original assignee: Emil Schwarz
Priority date: 1983-02-11
Filing date: 1983-02-11
Publication date: 1984-08-16
Also published as: EP0139630A1

Abstract

The nut (4) enables to provide a playless support of a front fork to the motorcycle frame by securing the four roller rings (J, L, M, N) by close fitting. In the conventional supports of the front fork, the upper roller (G) has a play up to 0.15 mm. This play is maintained up to the contact of the tire to the ground and increases according to the type of motorcycle by 6 to 10 times, that is up to 1.5 mm. The play of the upper roller is eliminated by the nut, and consequently equals 0.0 mm; when the tire is in contact with the ground, no motion is generated.

Description

P A T E N T B E S C H R E I B U N G

Device for absolutely play-free connection of the front fork to the motorcycle frame using a new support nut

For motorcycles, the front fork to the frame is made with two bearings. These are mostly axial ball bearings or tapered roller bearings. For this purpose, the outer rings of the bearings are pressed into the frame (press fitting). The inner ring of the lower steering head bearing is pressed onto the steering head shaft (press fitting), but the inner ring of the upper inner head bearing is provided with a clearance fitting on the steering head shaft. This is followed by the adjusting nut and then the lock nut; so the connection of the front fork to the frame is not free of play.

When installing a support nut, the connection is absolutely free of play, since the inner ring of the upper bearing is pressed onto the support nut. At the same time, the support nut serves as an adjusting nut and is countered by the lock nut on the control head shaft; this creates a play-free connection from the bearing to the support nut and from the support nut to the control head shaft.

OMPI

Claims

EXPECTATIONS

1. Device between the front wheel fork and motorcycle frame (F) to make an absolutely backlash-free connection by a support nut, characterized in that a bearing point of the front radio bearing (Figure 2 and 3) is equipped with this support nut (H), onto which a bearing ring is pressed (I); With this unit, the front wheel bearing is now set without play and countered with a lock nut (B). This arrangement prevents the bearing from knocking out.

2. Device between the front fork and motorcycle frame (F) to make an absolutely backlash-free connection by a support nut, according to claim 1, characterized in that the support nut and inner ring bearing can form a unit, or can consist of any amount of individual parts.

3. Device between the front wheel and motorcycle frame (F) to establish an absolutely backlash-free connection by a support nut, according to claim 1 and 2, characterized in that the arrangement of the bearing point with a support nut (H) can also take place at the opposite bearing point, or can be of any design. . Device between the front wheel fork and motorcycle frame (F) to establish an absolutely backlash-free connection by a novel support nut, according to claim 1, 2 and 3, characterized in that the combination "novel support nut and bearing type" can be as desired, such as that tapered roller bearings or axial Ball bearings (Figure 2 and 3) can be used.

5. Device between the front fork and motorcycle frame (F) to make an absolutely backlash-free connection by a support nut, according to claim 1, 2, 3 and Ψ, characterized in that also on any other Zwei¬ wheels, motorcycles, light motorcycles, mopeds, mokicks , Mopeds, bicycles etc. the front wheel bearing is equipped with a support nut.

6. Device, between the front fork and the motorcycle frame (F) to make an absolutely backlash-free connection by a novel support nut, according to claim 1, 2, 3, Ψ and 5, characterized in that this method is used in the repair case as well as in new manufacture or new designs can.

- 5U OM? I EXPECTATIONS

I *

7. device between the front fork and motorcycle frame (F) to make an absolutely backlash-free connection by a support nut, according to claim 1, 2, 3, 4, 5 and 6, characterized in that the size of this novel support nut is arbitrary by in the event of repair or individually adapted to the size requirements in the case of new production.

8. Device between the front fork and motorcycle frame (F) to make an absolutely play-free connection by a support nut, according to claim 1, 2, 3,, 5, 6 and 7, characterized in that the material for this novel support nut in Use comes, is arbitrary.

f _ C?. 'P ^* SUMMARY

The support nut (see sheet 1, figure H) creates a play-free connection between the frame and the front fork, because all four bearing shells (see sheet 1, figure J, L, M and N) have a press fit.

In the conventional mounting of the front wheel fork, there is play of up to 0.15 mm on the upper steering head bearing (see sheet 2, Figure J). This play continues until the tire is on the road and, depending on the type of motorcycle, increases 6 to 10 times (see sheet 3), that is up to 1.5 mm. The play on the upper steering head bearing is eliminated by the support nut, i.e. 0.0 mm; so there is also no movement on the support of the tire.