DE2313153A1 - PULLEY AND METHOD OF MANUFACTURING IT - Google Patents

Description

PATENT Attorney DIPL.-INQ. JOACHIM STREET NC HANAU · ROMEITSTIT. »■ FOSTFACH TW · TELIWOJ · TELEQITAMME: HANAUPATENT · TELEX. 4 «47» ip «t

^{P0TAIN S} - ^A -. March 15, 1973

Chevflly Larue (VaI de Marne) Schu / Ad - 10

France

■ Be! Disk and process for their manufacture

The invention relates to a pulley or SeM-zugrofIe, which does not require processing, as well as a method for their creation.

The known pulleys are generally made of cast Raw parts or manufactured from rolled products, that you have to work on, on the one hand, a chamfer with a certain profile and, on the other hand, a To obtain a hub that allows the insertion of one or more ball bearings or a ring. This method is complicated and expensive, and those thus made Sheaves are quite heavy and require regular maintenance.

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According to another characteristic, the parts in the form of shells are arranged in an annular and concentric manner, with one Outer shell with the open side of its U-shaped cross-section to the outside of the pulley and a middle shell with the open side of their U-shaped cross-section point to the center of the pulley, and these two shells with mutual contact of their backs by means of two circular Welding beads are welded together on both sides the back touch can be applied.

According to another feature, a ball bearing or a smooth slide bearing is arranged inside the hub. This camp can a ball bearing, a roller bearing, a needle bearing or another bearing se i η.

The invention is illustrated below in the drawing Execution examples explained in more detail.

Show it:

Fig. 1 is a longitudinal section of a pulley or pulley according to the invention, with two semicircular sheets,

Fig. 2 is a perspective partial view of the pulley

according to Fig. 1,

3 shows a longitudinal section of a pulley or pulley according to the invention with two shells and with ball bearings,

FIG. 4 shows an illustration according to FIG. 3, but in which a Sliding bearing is arranged inside the hub,

Fig. 5 shows another possible type of assembly,

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The object of the invention is to address these disadvantages avoid and use a pulley and a method for its To create manufacture, based on a new concept and a simplified structure that does not require machining and is therefore less expensive.

The object is achieved in a method of the above Kind achieved in that profiled elements are put together and thereby parts of the pulley or Seifzugrotle form, the assembly directly on a cylindrical hub without machining the part I see disk or pulley erfο Igt.

After an execution example, profiled elements are played used from half-round sheet metal or shells, which are made by deep drawing of metallic material. Here can

a professional rolling process can also be used, which is known, for example, under the trade name "Rotoflow".

According to another characteristic, the hub consists of an or several ball bearings, with the outer cage attached directly to the elements of the pulley.

According to another feature, the hub consists of a one A ring that forms a plain bearing and is attached directly to the elements of the pulley.

According to another embodiment, the profiled Elements welded during assembly.

According to a further exemplary embodiment, the parts in the form of two semicircular sheets are rotated during welding, the speed of the Iagerunqsgeschwindiqkeit Ab Iagerunqsgeschwindiqkeit the welding bead is adjusted so that the free surface of the liquid metal corresponds to the desired bottom profile of the pulley groove. 309840/0860 - 3 -

-A-

Fig. 6 shows a further variant and

7 shows a variant with a single bearing held between two round plates.

In Figs. 1 and 2, a pulley 1 consists of two Cheeks or parts 2. Each part 2 in turn consists of one Half-round sheet, for example by deep drawing a sheet metal strip arises and which has such a profile that mechanical Stresses can be absorbed without deformation.

Each part 2 is provided with a center opening and has such a profiled outer edge that in the composite State of the parts 2 with a circumferential Ken ie 3 a certain profile, while the central opening provides a support forms for one or more inserted ball bearings 4.

The two parts 2 are connected by a welding bead 5 (Fig. 1 and 2) , which are deposited when the parts are rotated, the speed of rotation being adapted to the deposition speed of the welding bead, so that the free surface of the liquid metal has the desired end profile the throat coincides (Fig. T). Because of this, no editing is required. On the other hand, the outer cage of the ball bearing or bearings 4 is welded into the bearing created by the central opening of the parts 2 by means of a continuous round seam 6. Of course, other types of connection such as gluing, edging or simple pressing or pressing can also be used.

The ball bearing 4 can of course also by a The ring forming the plain bearing must be replaced. Receives in both cases a cylindrical middle part on which the elements or parts 2 of the pulley 1 are attached directly.

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According to Fig. 3, a pulley to is such that the parts 2 consist of two annular concentric shells 11 and 11, which form an opening or center bearing. The outer shell 11 has a U-shaped bulged cross-section which is open to the outside of the pulley and forms its throat 13, while the middle shell 12 has a U-shaped bulged cross-section which opens towards the center of the pulley. These shells 11 and 12 are arranged concentrically one above the other, wherein the bottom of the shell \ ^ on the bottom of the middle shell rests 12 and wherein the shells are welded together by two attached to the contact point on the bottom weld beads 14 and 15 °.

The ball bearing 16, which forms the hub of the pulley 10. Is directly by means of continuous weld beads 17 on the Shell 12 attached.

According to Fig. 4, the hub of a pulley 10 is a ring 18 in an attached slide bearing 19 is inserted.

In the case of FIG. 5, each lateral round sheet 2 has In the area of its middle opening there is a flange 20 on which the or the bearings are attached, e.g. by means of a welding bead 6.

In the case of Fig. 6, the two flanges 20 are extended so that they touch each other, whereby they by an inner Round seam 2t are connected. The two flanges 20 form a real continuous hub after welding the Sei Ischeibe.

In the variant of FIG. 7, the two are cheek-shaped Parts 2 welded in a zone 22. This can be a seam weld, a spot weld or a projection

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trade welding.

Finally, each part 2 has an angled portion 23 in its central zone, for example to surround a ball bearing.

The advantages of the new pulley or pulley are w I e fο Igt:

it does not require any editing, either before or after the construction;

it is lighter than conventional sheaves and does not require maintenance;

it does not require a spacer to hold the parts to be able to mount on a ball bearing or a ring;

the half-round sheets or the. Shells that make up the parts can also be made of non-metallic material;

Any type of connection can be used, e.g. soldering, Welding, gluing, mechanical means I, d i β das B i I den * a groove with a given profile is allowed without machining before or after assembly;

Expectations :

309 δ AO / 0860

Claims (8)

Expectations t. Process for the production of a sheave or a pulley, characterized in that profiled elements are assembled and thereby forming parts of the pulley or pulley, the assembly directly on a cylindrical Hub succeeded without machining the pulley or pulley. 2. The method according to claim I, characterized e t c h η e t that profiled elements made of semicircular sheet metal or shells are used, which are made by deep drawing are made of metallic material. 3. The method according to claim 1, characterized in that that the hub consists of one or more ball bearings, the outer cage directly on the elements the soap washer is attached. 4. The method according to claim t, characterized in that the hub consists of a plain bearing Bifdenden ring, which is attached directly to the elements of the pulley. 5. The method according to claim 1, characterized in that that the profiled elements are welded during assembly. 6. The method according to claim 5, characterized in that qekenn- z e i c h η e t that the parts are in the form of two half-round sheets be rotated during welding, whereby the speed of rotation of the starting speed of the welding bead is 309840/0860 is fitted so that the free surface of the liquid Metal corresponds to the desired floor profile that corresponds to the bevel throat. 7. The method according to claim 5, characterized ge k e η η ζ e I c h η e t that the part I θ in the form of Shells are arranged annularly and concentrically, with an outer shell with the open side of theirs U-shaped cross-section to the outside of the pulley and a middle shell with the open side of yours U-shaped cross-section point towards the center of the pulley, and these two shells under each other Touching their backs by means of two circular ones Welding beads are welded together, which are applied on both sides of the back contact. 8. The method according to claim 1, characterized in that g e k e η η ze? c h η e t that inside the hub a ball bearing or a smooth slide bearing is arranged. Se i I see i'be or Se i I zugrol I e without processing according to the method according to one or more of the claims I to 8, characterized in that that it has a groove with a given profile, which is formed by two assembled parts, wherein these parts are attached directly to the hub, bearing or ball bearing. 3098A0 / 0860 Blank page