CH664538A5 - METHOD FOR ASSEMBLING PEDAL ORGANS FOR CYCLES AND SIMILAR PEDAL VEHICLES. - Google Patents

Description

DESCRIPTION

The object of the invention relates in particular to the technical sector of transport and vehicles in general, and more particularly to bicycles, tandems and all similar vehicles powered by a pedaling system.

The pedals of cycles and similar vehicles consist essentially, on the one hand, of a central axis (in the example of the drawing figures), which is fixed by screwing or otherwise to the end of a crank (not shown) of the pedaling system, and, on the other hand, by support and thrust members for the cyclist's foot, these members being mounted rotating around the axis. Said rotating members are generally constituted by a pedal cage or equivalent members, on which the support and the thrust of the foot are exerted; ball bearing bearings generally, which are fixed to the cage and rotate on rolling cones which equip the fixed axis. One of the bearing cones is formed directly against a shoulder of the axle as illustrated in the drawing. The other bearing cone is attached is engaged on the axis, then fixed axially along said axis, so as to ensure the permanent assembly of the organs constituting the pedal. The assembly is usually completed by a central tube which connects the bearings and protects the bearings, and also by an external plug which constitutes a cover concealing and protecting the end of the axis.

In this assembly, it is understood that the axial position of the bearing cone which is attached to the free end of the axle is an essential element for correct mounting of the pedal, which must both allow the necessary and sufficient play of the balls between the bearing cones and the bearing cups of the bearings, and also present no excess of axial play which would cause an unpleasant and detrimental "floating" of the rotating members relative to the axis.

In order to fix the axial position of the cone, screw and nut-lock systems have been proposed, with corresponding threads on the axis, which is relatively expensive and does not exclude adjustments. It has also been proposed to execute the axis in a smooth manner without threading,

the cone also smooth being engaged on the axis by forcing it, then the assembly is retained by pinching or crushing the axis behind the cone. These pinching or crushing operations cannot be precise, so that in most cases there is a blocking of the bearings or, on the contrary, too much play which causes the indicated drawbacks. It has also been proposed to fix the axial position of the cone by soaking the cone or riveting. However, it is obvious that these methods do not provide precision and cause the drawbacks of blocking or excessive play that have just been mentioned.

The object of the present invention is to remedy these drawbacks. This object is achieved by the method according to the invention as defined in claim 1.

According to a variant of the invention, the stop member engaged on the smooth axis following the cone can be a hoop whose dimensioning of the smooth bore is substantially less, so that said hoop can be hot-pressed or engaged, under a high pressure exerted mechanically in a progressive manner, up to the desired axial position.

On the other hand, the stop member, engaged on the smooth axis following the cone, can be fixed by gluing when it is brought to the precise axial position sought.

In the accompanying drawing illustrating the subject of the invention by way of example:

Figure 1 is a plan view of a pedal cage formed by all of the rotating members.

FIG. 2 represents, in a corresponding manner, the axis of a pedal of the type of which one end is threaded to be fixed to the end of a crank, the other end being smooth like the cone and the member which are shown before assembly on the axial extension of the axis.

Figure 3 is a sectional side view of a pedal whose component bodies are assembled by shrinking.

Figure 4 illustrates, on a very substantially larger scale, the smooth end of the axis and the precise assembly conditions by a locking hoop of the pedal members.

Figure 5 shows, on a smaller scale, the smooth end of the axis assembly, and the assembly performed by means of a glued stop member.

FIG. 6 represents the smooth assembly end of the axle, and the assembly carried out directly by bonding the bearing cone to the smooth axle.

In the embodiment of the assembly device illustrated in Figures 1 to 3, the free and smooth end (lb), at the end of the axis (1), receives the rolling cone (3) which is slidably engaged friction until contact against the balls (6) or other running gear. Following and around the axis is engaged a stop member (7) constituting a hoop by the fact that it has a smooth bore (7a) whose dimensioning (7b) (FIG. 2) is slightly lower, within the appropriate tolerances, to the dimension (le) of the smooth axis, so that the hoop stop member can be hot-pressed or engaged under high pressure symbolized by the arrows F in FIG. 4, up to at the very precise axial position (P) illustrated in broken lines in FIG. 4. This position (P) must take account of a clearance (J) illustrated in FIG. 4, which must remain between the member (7) and the cone (3). This clearance (J) has a precise value since it must allow the free rolling of the balls or the like, without there being an excessive axial clearance generating a relative freedom or axial "floating" of the cage with respect to the axis. , which results in vibrations, noises, abnormal harmful efforts.

The high pressure symbolized by the arrows F must be exerted mechanically by any appropriate means, but, according to the method and the provisions of the invention, provision is made in a preferred and non-limiting manner to operate on a press whose punch or the movable member is controlled for a descent which can be rapid at the start of the journey, then very slow and progressive at the end of the journey to reach position (P) with very high precision. The press can be adjusted and / or programmed, in the event of automation of the operation or of all assembly operations, if the en2

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seems the assembly and adjustment of the pedal is automated, which is made perfectly possible and interesting by the means and the method of the invention.

When the member (7) is in the position (P) on the axis, the assembly is blocked without risk of adjustment or untimely disassembly. 5 This does not exclude that one can operate a disassembly by pressures or reverse mechanical forces to remove the member (7).

Likewise, if the clearance (J) and the position (P) are not strictly observed during the positioning of the hoop member (7), it is possible, always using mechanical means and in particular d '' a press, exert a high pressure in (FI) on the end of the axis (1), in order to find the optimal play (J).

Of course, and under the conditions known in themselves, the member (7) and the axis (1) undergo an appropriate heat treatment by quenching and tempering for example; these treatments may vary according to the metals, alloys or materials in which or in which the axis and the stop member are made.

As a variant, according to FIG. 5, the stop member (8) is glued according to any known gluing method, on the smooth end (lb)

of the axis (1), being brought before the precise position (P) on the end (lb). The member (8) can be made of metal, alloy or plastic or composite material, it being emphasized that bonding can be implemented for all these metals or materials. It is provided for bonding, if the member (8) is plastic or composite material, that a sleeve of the same material is fixed around the axis (1).

According to the embodiment of FIG. 6, a simplified variant is found in the fact that the bearing cone (3) is directly hooped or glued with precision around the axis (1).

The interest and the advantages of these characteristic arrangements and of the process are emphasized:

- by the very high precision and better results than the known methods and means;

- by the speed of assembly and assembly of the pedals, with the possibility of automated production;

- by perfect and very precise control of the operating clearance;

- by eliminating shocks, crushing or strong deformations of metal, welds.

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Claims (5)

664,538 CLAIMS 1. A method of assembling pedal members for cycles and vehicles similar to pedals, pedals which include a rolling cone (3) having a smooth bore engaged in friction sliding on a smooth end of the axis of rotation (1), characterized in that the fixing in the axial direction of the rolling members (6) of the pedal relative to the axis is carried out by means of a stop member (7) having a smooth central opening to be engaged by the outside on the smooth axis following the cone, this member being brought to an axial position so as to reserve for the rolling members the mechanically necessary clearance, and being dimensioned or treated to be fixed by force but without shock , without crushing metal and seamless. 2. Method according to claim 1, characterized in that the stop member engaged externally on the smooth axis following the cone is a hoop whose dimensioning of the smooth bore is substantially less, so that said hoop can be fitted or engaged, under a pressure exerted mechanically in a progressive manner, to the desired position. 3. Method according to claim 1, characterized in that the stop member engaged on the smooth axis following the cone is fixed by gluing when it is brought to the desired axial position. 4. Method according to one of claims 1 to 3, characterized in that the rolling cone is engaged on said smooth axis, then the stop member following the cone by bringing said member into a precise axial position on the axis, and that is ensured directly, without impact, without crushing metal, or welding, fixing by shrinking or gluing. 5. Method according to claim 1, characterized in that the rolling cone is attached to the smooth end of the axis, and directly constitutes the stop member, the cone being hooped or glued.