DE7924594U1 - STEERING PULLEY WITH ONE MOUNTING PIN - Google Patents

Description

PATENT LAWYERS

LUDEWiG DiPL-PHYS. BUSE - DiPL-PHYS. MENTZEL

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5600 WUPPERTAL 2, the

37 Password: "Rctfirzapfen"

Company. Albert Schulte Sons KG ₇ Remscheiderstr. 25, 5632 Wermelskirchen

Swivel castor with a B & mounting pin

The invention relates to a swivel castor with a wheel fork between two bearing shells on ball races holding, a swing bearing forming mounting pin, which with a one Shank part riveted at the top and bottom the pivot bearing penetrates and holds together axially.

In one known from DE-AS 13 03 706 castor has the fastening pin has a threaded shaft that protrudes above the castor and consists of a hexagon Approach emerges upwards. On the underside of the attachment there is a shaft part which penetrates the pivot bearing and surmounted by a rivet head on the underside of this pivot bearing. So that the pivot bearing is on the mounting pin held by the hexagonal shoulder on the top and the rivet head on the underside.

In another known swivel castor, as can be seen, for example, from DE-Gbm 74 39 939, the pivot bearing is also held on a mounting pin. However, this fastening pin has a pivot bearing on the upper side protruding smooth-walled shaft, from which the swivel

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bearing penetrating shaft part by a cylindrical
Approach is separate. The cylindrical approach settles on
the top of the swivel bearing and is * βμΐ the underside of which is deformed into a rivet head.

Such known fastening pins are usually machined on I automatic lathes from the solid, so that

on the one hand, a relatively high material waste is accepted

must be and on the other hand for manufacturing reasons

a free cutting steel is used, which is known to be relatively

is brittle and therefore has special manufacturing precautions Requires precautions for forming the rivet head. In many cases, when using a swivel castor shown in DE-Gbm f 74 39,939, its fastening pin is also used

for connection to an underframe holding the swivel castor

with a transverse to the longitudinal direction of the fastening pin verjf running threaded hole provided, which is also upset when riveting the 'shaft part, so that in many cases a

Re-cutting of the threaded hole becomes necessary.

The object of the present invention is to provide a \

To create a swivel castor of the aforementioned type, the percentage of fastening of which dispense easily and economically with less material usage

»Can be produced. f

This object is achieved according to the invention in that the Bejj The fastening pin has a tubular cross-section with a drawn-in shaft part, the lower end of which is marked with an f

Flare engages under the pivot bearing. It can now
use a pipe to produce the fastening pin,
to which the approach and the shaft part, for example, through
Rolling or pressing in a single, extremely short operation _: can be produced. In addition, the choice is yours

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the material to be used for the fastening pin is relatively free, so that expensive and brittle free-cutting steel can be dispensed with, while inexpensive * and tough materials that allow non-cutting deformation are used be able.

In the case of simple swivel castors without any locking or in the case of swivel castors with one which has the locking lever directly Braking device, it is advantageous if the approach of the shaft part consists of both the outer diameter of the shaft part as well as the outer diameter of the fastening pin protruding bead is formed, since this is on the outside for support the holder of a frame that holds the roll od. dg-l · · ,; can be used.

When using the swivel castor, in particular, it can be locked both in its pivoting direction and in its running direction Bed castors, it is necessary that the fastening pin receives an actuating mechanism in its interior. In such cases, according to a further feature of the invention, the approach between the shaft part and the pivot bearing is The shaft of the fastening pin protruding on the top side, preferably by a shaft that arises when the shaft part is drawn in radial ring wall formed. In any case, the approach can either be on the inside or outside of the fastening pin as an abutment for flanging the lower end of the pivot bearing penetrating shaft part are used. This means that the actual shaft of the fastening pin remains free of upsetting forces free, so that threaded holes to be arranged thereon can already be cut without them being caused by the upsetting process are at risk.

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The invention is shown in the drawing and is explained in more detail below:

1 shows the fastening pin according to the invention containing caster in a partially shown in a broken section Side view,

2 shows an embodiment of a in vertical section shown, a bead having mounting pin, on the left side of the output tube and on the right side of the finished molded

*, '■ / mounting pin is shown,

3 shows a further embodiment of an im

Vertical section shown, a mounting pin having a contact surface, on the left the output pipe and on the right also the fully formed mounting pin is shown.

The swivel castor has a wheel fork which holds a rotatably mounted wheel 12 on an axle. The two fork legs are connected to one another via a fork web 13, the fork web 13 between an upper bearing shell 14 and a lower bearing shell 15 summarizes. The bearing shells 14 and 14 are connected to one another, for example by pressing, in such a way that that on the one hand between the fork web 13 and both the upper bearing shell 14 and the lower bearing shell 15 two ball races 16 and 17 are arranged, while on the other hand in

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middle area of the bearing shells 14 and 15 to the Conical rings 16 and 17 concentric opening 18 remains. The bearing shells 14 and 15 form together with the ball races 16 and 17 a pivot bearing 19 rotatable relative to the fork web 13,

In the front area of the wheel fork cavity, which is adjacent to the pivot bearing 19, in the embodiment shown in FIG arranged, which can be locked in the braking direction via a toggle lever mechanism 21 and can be released in the freewheeling direction. For the subject matter of the invention, however, the presence of a locking device for the castor is meaningless, so that a more detailed description of the locking device is not is required.

In the opening 18 of the pivot bearing 19 summarizes a shaft part

22 of a fastening pin 24 protruding from the pivot bearing 19 on the upper side with a shaft. This fastening pin 2 4 consists of a tube to which a between the shaft

23 and the shaft part 22 arranged extension 25 formed in one piece is. To fix the fastening pin 24 on the pivot bearing 19, there is a flange on the lower end of the shaft part 22 26 attached so that between the extension 25 and the Aufbörderlurig 26, the pivot bearing 19 is held together axially is. It likes to fix the fastening pin in a non-rotatable manner

24 be arranged on the pivot bearing 19 below the bearing shells 14 and 15, a locking ring 27, which is located on one of the desired flaring according to rounded support ring 28 supports. In the mounting pin shown in Figure 2, the output component is a tube 29 with a Shank 23 corresponding cross-section. On the one hand, a bead 30 forming the approach is through this tube without cutting

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Pressing, rolling or the like. molded in such a way that its outer diameter is larger than the outer diameter of the shaft 23 of the fastening pin. Below the bead 30 is that Tube drawn in to form a shaft part 22, if necessary in a pressing process, the outer diameter of the shaft part 22 being smaller is than the outer diameter of the shaft 23. On the shaft 23, a threaded hole may be arranged transversely to its longitudinal direction 31 be arranged, through which the fastening pin can be attached to a sub-frame.

The fastening pin 24 shown in FIG this is also formed from a tube 29 ', the cross section of which

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speaks ;, That in the formation of the shaft part 22 'by rolling, Press ocLägl. resulting radial ring wall forms at the same time the approach 25 to rest on the top of the pivot bearing 19. In both cases, the bottom of the shaft part 22 or 22 'with one, for example, in a pressing process provided flanging to be produced.

As already mentioned, the embodiments shown only reproduce the invention by way of example and it is by no means limited to that alone. On the contrary, many other designs and modifications are possible. This is how it is, for example also conceivable, a fastening pin with a cross-section deviating from the circular shape in the above-described Way to design.

PATENT LAWYERS

DIPL.-ING. LUDEWlG dipl.-phys. BUSE - dipl.-phys. MEMTZEL

5600 WUPPERTAL 2, den 37 Password: "Rohrzapfen"

List of reference symbols

10 Wheel fork 11th axis 12th Wheel 13th Fork bridge 14th Bearing shell, upper 15th Bearing shell, lower 16 17th "Ruxjelkranz 18th breakthrough 19th Swivel bearing 20th Brake lever 21 Knee lever mechanism4.smus 22nd Shaft part 22 ' Shaft part 23 shaft 23 ' shaft 24 Mounting bolts 25th Approach , , 26th Flaring 27 Circlip 28 Stutζring 29 pipe 29 ' pipe 30th bead 31 Threaded hole 32 Ring wall

Claims (3)

ι »* α a · ta * · PATENTANWÄLTE DiPL-iNG. LUDEWiG DIPL.-PHYS. BUSE · DiPL-PHYS. MENTZEL 5600 WUPPERTAL 2, the keyword: "Rohrz apfen" Claims: 1. Swivel castor with a wheel fork between two bearing shells A pivot bearing forming mounting pin with a top end with a ball bearing ring Approach having, lower end riveted shaft part penetrates the pivot bearing and axially holds it together; characterized in that., the fastening pin (24) is tubular Has a cross-section with a drawn-in shaft part (22,22 '), the lower end of which is flanged (26) engages under the pivot bearing (19). 2. Castor according to claim 1, characterized in that the projection (25) of the shaft part (22) consists of both the outer diameter of the shaft part (22) as ε-I the Outer diameter of the fastening pin (24) protruding bead (30) is formed. 3. A swivel castor according to claim 1, characterized in that the shoulder (25) between the shaft part (22 ') and the shaft (23') of the fastening pin (24) protruding on the upper side protruding from the pivot bearing (19) by a during retraction of the shaft part (22 ¹ ) resulting, radial ring wall (32) is formed. -2-