DE102008027568A1 - Mounting device for joints - Google Patents

Abstract

The invention relates to a device for mounting joints with: at least one receptacle (4) which is fixedly arranged on a machine table (4) and with which a spider (53) and connected to a shaft fork (10) to each centering and stationary to the machine table (4) are tensioned.

Description

Field of the invention

• – zumindest einer Aufnahme, die ortsfest an einem Maschinentisch angeordnet ist und mit welcher ein Gelenkkreuz und eine mit einer Welle verbundene Gabel zueinander zentrier- und ortsfest zum Maschinentisch spannbar sind,
• – mit mindestens einem Gehäuse, welches mit dem Maschinentisch verbunden ist,
• – zumindest einem Stempel zum Einpressen einer Gelenkkreuzbüchse in ein Gabelauge der Gabel und zum Prägen, welcher in dem Gehäuse hin- und her antreibbar längsbeweglich in dem Gehäuse angeordnet ist,
• – einem Längsantrieb, die zumindest längs an dem Gehäuse abgestützt ist und mit welcher der Stempel relativ zu dem Gehäuse hin- und her antreibbar ist,
• – mit wenigstens einer Spanneinrichtung, mit welcher eine Spannkraft zum Aufweiten des Gabelmauls auf die Gelenkgabel übertragbar ist,
• – mit wenigstens einem Greifer als Bestandteil der Spannvorrichtung, mit dem ein Gabelende beim Aufweiten des Gabelmauls greifbar ist,
• – mindestens einem ersten Anschlag, welcher von dem Gelenk weg gewandt und welcher zumindest zeitweise mit dem Greifer längs in eine Richtung beweglich ist,
• – zumindest einem zweiten Anschlag, welcher dem ersten Anschlag längs in Bewegungsrichtung des Greifers gegenüber liegt und welcher längs verstellbeweglich angeordnet ist.

The invention relates to a device for mounting joints with:

• - At least one receptacle which is fixedly arranged on a machine table and with which a spider and a shaft connected to a fork centering one another and are clamped fixed to the machine table,
• With at least one housing which is connected to the machine table,
• - At least one punch for pressing a universal joint bushing in a fork eye of the fork and for embossing, which is arranged in the housing reciprocally drivable longitudinally movable in the housing,
• A longitudinal drive which is supported at least longitudinally on the housing and with which the plunger can be driven back and forth relative to the housing,
• With at least one tensioning device, with which a tensioning force for widening the forked jaw can be transmitted to the yoke,
• - With at least one gripper as part of the tensioning device, with which a fork end is palpable when expanding the fork mouth,
• At least one first stop which faces away from the joint and which is at least temporarily movable in one direction with the gripper,
• - At least a second stop which is longitudinally opposite the first stop in the direction of movement of the gripper and which is arranged longitudinally adjustable.

Background of the invention

The Articulated fork of a joint has two fork ends, which are the fork mouth limit. In each of the fork ends is an eye for receiving a Joint box formed. The fork eyes are lying spaced from each other at the fork mouth. at the assembly of the joint, the spider is positioned in the fork so that each lying on a common axis pin a bar of the cross project into the opposite eyes. Afterwards, in a common step, a universal joint box is made pressed into the respective eye and thereby on the respective pin deferred until over the can bottom Pretension is applied to the pin. Then the cans axially on the bottom, for example by embossing / caulking secured by material in the eye and thus at the fork end.

at the assembly of the universal joint bushes on the pin of a Therefore, the universal joint must be a defined Amount to be elastically expanded. Thereby the distance, with the fork eyes are opposite to the fork mouth to increased a defined amount, so that the Fork finally based on its initial state slightly widened.

At the Widen the fork ends in the fork mouth of hook-like Tools or similar suitable means, hereinafter are referred to as grippers, engaged behind and pulled away from each other, so that the fork mouth widens. The material of the joint fork it gives way in the elastic range. This condition is largely temporary, because at the assembled joint are the fork ends back to their starting position at least partially compressed. You are at least so far absorbed that the opposite rifle floors the pressed into the eyes universal joint bushes against the respective pin end face are biased and the pin thus between them. This is to preload on the front pages of the pin to be generated in the joint so as the arrangement in order defined flexion moments in the universal joint assembly backlash too hold.

At the Pressing the Gelenkkreuzbüchsen in the eyes and a subsequent embossing act on both fork ends Forces, which are usually the fork ends by elastic or even to move partially plastic deformation towards each other would. The fork mouth would narrow under the nominal size. After mounting, the fork ends would be around the elastic Rebound amount, which is usually sufficient to the necessary tension pick up between the can bottom and the pin again. The desired flexion moment would not be met.

The Articulated fork therefore remains at least during assembly as long as widened in the manner described above until the universal joint bushes on pushed the pins and axial in the fork eyes, for example are secured by embossing. Because the fork during of pressing and stamping is kept widened, Thus, it is also prevented that the fork ends due to the Pressing and the caulking to move towards each other. The resulting from the pressing and embossing forces are caught with the device, widened with the fork end becomes.

A criterion for how far the fork mouth has to be widened is ultimately the flexion moment which is to rest on the assembled universal joint. In the illustrations after 1 . 1a and 1b the expansion forces are therefore directed horizontally in the picture horizontally. The position of the fork end 13 after widening is in 1a with the dashed line symbolizes the line. The amount of expansion is reflected in the 1 shown gap "S" again, which is a criterion for the default of the device. The values for "S" are dependent on the material and the construction of the fork structure and, moreover, within the same structure also depending on tolerances and production lot dependent.

In DE3537234A1 a device for mounting joints is described. The device has a fixedly arranged on a machine table clamping and centering device with which the spider and connected to a shaft fork can be centered and stretched. On each side of the fork, a housing is provided which is fixedly connected to the machine table. In each case, a cylinder is accommodated in each case. The cylinder is arranged longitudinally displaceable in the housing and receives in each case a piston. On the piston of the punch for pressing and stamping is fixed. The piston is actuated by means of pressure, so that the plunger with the piston can be longitudinally reciprocated relative to the cylinder in the longitudinal direction. The cylinder is in turn limited to the piston back and forth.

Of the Piston in with a longitudinally adjustable first stop Mistake. The first stop points in the direction of the joint. One is fixedly connected to the housing second stop the first stop in the press-in and stamping direction to limit the piston travel when pressing in and embossing across from. The distance between the first stop and the second stop is variable and corresponds to the way the the press-in and embossing stamp for pressing in and embossing should go back. Also, in the case a third stop provided, the displacement of the respective Cylinder in the direction opposite to the press-in direction, so when moving from fork end away, limited. A fourth stop limits the path of the respective cylinder in the pressing in Interaction with the aforementioned third stop. The fourth Stop is adjustable. The path around which the fork ends are widened corresponds in the initial position of the device a gap between the third stop and the fourth stop and is by adjustment of the fourth stop variable. A gripper is attached to the cylinder, with the fork end to hold or Expansion is underpinned.

The Fork and the spider are held in the receptacle so that the longitudinal axis of the cylinder or the center axes of the stamp coincide with the common axis of the fork eyes. Between Spigot end and punch is the universal joint bush held. In each case a fork end is in the fork mouth of a gripper engaged behind. The cylinders are acted upon with pressure medium and each move away from each other until the respective third Stop at the fourth stop comes to concern, that is the cylinder is fixedly supported on the housing to the machine table is. Thus, the fork mouth is the Einstellmaß accordingly widened. After the previous step moves the respective piston for pressing in and embossing the universal joint bushing in the direction of the fork until the first stop on the second stop for Concern comes. When pressing in, the force flows from the punch towards the fork end on the universal joint bush and press this one. The force is passed on to the fork end. Since that Fork end held by the gripper in the opposite direction and the cylinder is fixed to the housing at the first stop is supported, the power flow is closed until the Piston moves to stop.

In DE3537234A1 It should be noted that due to the press-in force and the holding force acting in the opposite direction of the gripper, a bending moment acts on the fork arms, which can lead to an additional widening. This unpredictable widening can lead to errors in the preload on the assembled joint.

• – komplizierter Aufbau der Vorrichtung;
• – zu hohe oder zu niedrige Einstellwerte und daraus resultierend, zu geringe oder zu hohe Beugemomente des fertigen Gelenks;
• – ”Überdehnung” des Materials der Gabel des Materials beim Aufweiten bis in den plastischen Bereich;
• – Das Werkzeug zum Aufweiten greift mit einem Abstand H (1b) zum Gabelauge 23 an. Dieser Abstand ist ein Hebel ”H”, über den Momente wirken, die bei der Einstellung der Vorspannung S berücksichtigt werden müssen, aber schwer einzuschätzen sind.

The risks associated with the problems of the prior art are:

• - complicated construction of the device;
• - too high or too low setting values and resulting, too low or too high bending moments of the finished joint;
• - "overstretching" of the material of the fork of the material when expanding into the plastic area;
• - The tool for expanding engages with a distance H ( 1b ) to the fork eye 23 at. This distance is a lever "H" over which act moments that must be considered in the adjustment of the bias voltage S, but are difficult to estimate.

Summary of the invention

The The object of the invention is therefore to provide a device for mounting of joints, with the aforementioned drawbacks be avoided.

These Task is with the features of the characterizing part of the claim 1 solved.

The housing is longitudinally movably connected to the machine table relative to the machine table. The gripper is at least when expanding rigidly coupled to the housing and with this longitudinally movable. The longitudinally movable connection of the housing to the machine table is, for example, by means of a linear guide or ruler position realized with the housing is mounted longitudinally movable on the machine table. The gripper, which otherwise has to be movable into and out of the fork mouth of the yoke in any manner, is connected directly to the housing, at least during expansion, and can be moved with it. The gripper is a hook in its simplest form.

The Articulated fork is held stationary with a receptacle on the machine table. When pressing the force flows from the stamp in the direction Fork end on the universal joint bush and press this. Previous and described methods are preferred with two of the devices performed simultaneously on the yoke, d. H. that at the same time both universal joint cans with each such device can be pressed into the fork. The process However, for simplicity, only one device will be described.

The Pressing force has long been working towards the fork mouth. The longitudinal drive relies on the reactions of the press-in force in the other direction along in the housing. The force is passed on to the fork end. The fork will be at the same time by the gripper in the direction of movement of the punch held back immobile. The reaction forces the pressing force thus act on the housing and continue on the gripper in the opposite direction of pressfit at the fork end. The power flow is closed. The pressing forces are designed so high that this is an amount of resistance overcome the fork mouth against elastic expansion. The fork mouth is widened as a result. The amount to the the fork mouth widens, is balanced on the longitudinal drive, because the housing is not fixed to the machine table but longitudinally displaceable is. As a result, the housing deviates in this floating arrangement with the gripper away by that amount from the fork mouth as long as in the direction the second stop longitudinally until the second stop this movement stops. Both the pressing process and the expansion - that is, Expanding and pressing in sync with each other - are upon impact of the first stop on the second stop in usually finished. In the now rigid device of the stamp moved further along to the embossing, until this too Process is completed.

Either the bracing and expansion as well as the pressing and embossing are due to the floating arrangement by means of a common Drive realized. Another drive, as in a previous one described device according to the prior art, is not necessary. The longitudinal drive is essentially through one or more drives and a linear actuator formed.

drives are preferably operated by electric motor or pneumatically. The linear actuator is for example a spindle, a ball screw or a rack and pinion drive. On hydraulic drives can be for environmental reasons and omitted for cost reasons.

Of the Amount by which the yoke is widened can be specified more precisely become. This is done between the first stop and the second stop a gap formed, the previously preferably empirical corresponds to the determined path out of the deformation. Also under consideration the influence of the deformations due to the initially described Lever H can be detected more accurately in this case. The device can also be alternative to the setting of a gap with a Gap 0 are operated - that is, the attacks are from the beginning "on block" and the press-fitting process is specifically controlled by controlled forces of the longitudinal drive.

first Stop can be a fixed stop on the housing or, like an embodiment of the invention provides, one to the housing be separate stop. When the stopper to the housing is separate, this is at least in one through the housing Lengthwise taken. This is what an embodiment looks like the invention that the first stop on a support block is trained. The support block is longitudinally displaceable stored on the machine table. With such a device can to different mouth widths of forks for joints be adapted to different size, without that the device be converted consuming got to. In this arrangement, there are then arranged in series one after the other a first longitudinal stop on the housing or on one extending from the housing in the longitudinal direction Support, a second longitudinal stop on the support block, the opposite the first longitudinal stop. On the the other side of the support block then follows the actual and first rectified with the first longitudinal stop Stop, which finally faces the second stop lies.

Of the the first stop opposite second stop is adjustable. This is for the exact setting of the previously described gap between the first and second stop and also to adapt to the different sizes different joints required. It is another advantage the device that this when changing from a joint type to other or when changing the size of the joints does not have to be converted consuming.

On the one hand, the path between housing, ie between the first stop and the second to the machine table fixed to Impact should be as short as possible, ie correspond exactly to the gap to be set. On the other hand, however, space is required for feeding the articulated fork and for extending and retracting the gripper into the fork mouth, which is substantially greater than that of the gap dimension. With an embodiment of the invention it is therefore provided that the second stop in the movement space of the first stop in and out again. From the movement space out the second stop is driven, for example, when the assembly of a joint is completed and this is to be removed from the device or when a yoke is inserted for reassembly in the device. After the yoke is centered and cocked in the receptacle, the second stop is moved back into the movement space, so that it faces the first stop in the longitudinal direction, and then set the gap.

The Housing is an alternative, with one, two or more Provided supports or support columns, the in the longitudinal direction at least as long as the route, to move the housing to prepare for assembly must become. The support columns dive in this Case in the preparation of the assembly in accordance with the outer contour the support columns corresponding bushings without acting as a stop.

Description of the drawings

1a shows a part of a yoke 10 , The joint fork 10 is and remains during the assembly of the joints widened at least until the Gelenkkreuzbüchsen 21 on the cones 52 of the spider 53 deferred and in the fork eyes 23 axially secured, for example, by embossing. Because the fork 10 is kept expanded during the pressing and embossing, thus also prevents the fork ends 13 to move towards each other due to the press-in and caulking forces. The forces resulting from the pressing in and embossing are absorbed by the device with which the fork 10 is widened.

A criterion for how far the fork mouth 22 must be widened, is ultimately the diffraction moment, which should rest on the assembled spider. In the illustrations after 1 , and 1a the expansion forces are therefore directed horizontally in the picture horizontally. The position of the fork end 13 after widening is in 1a symbolized by the dashed line.

The amount of expansion is reflected in the 1 shown gap "S" again, which is a criterion for the default of the device 9 is. The values depend on the material and the structure of the fork structure and, moreover, within the same structure also depending on tolerances and production lot dependent.

Description of the Drawings - Device ( 1 )

• – einen Maschinentisch 1,
• – eine Prägeeinheit 2,
• – einen Abstützblock 3,
• – eine Aufnahme für Gelenkgabeln 4,
• – eine Sperre 5 und
• – eine Stelleinheit 6

auf. Der Vorrichtung 9 liegt am anderen Gabelende 13 eine weitere gleichartig oder anders ausgebildete aber nicht dargestellte Vorrichtung gegenüber. Die Vorrichtungen weisen dann vorzugsweise gemeinsam einen Maschinentisch auf.Construction: The device 9 for mounting universal joints has at least

• - a machine table 1 .
• - An embossing unit 2 .
• - a support block 3 .
• - An intake for joint forks 4 .
• - a lock 5 and
• - an actuator 6

on. The device 9 is on the other end of the fork 13 another similar or differently designed but not shown device. The devices then preferably together have a machine table.

The machine table 1 is the stationary reference, that is, the term "stationary" is relative to the machine table 1 fixed or on the machine table 1 to understand. The longitudinal directions 11 and 12 , in which the longitudinal axis of the machine table 1 are hereinafter referred to with the terms "longitudinal", first longitudinal direction 11 and second longitudinal direction 12 designated. The symmetry axis 14 the propeller shaft is perpendicular at least during assembly of the universal joint bushes and thus transverse to the longitudinal axis 11 / 12 aligned.

The embossing unit 2 is in the longitudinal directions 11 and 12 longitudinally movable and at least in the first longitudinal direction 11 relative to the machine table 1 Barrier bar. In addition, the embossing unit 2 transverse to the longitudinal directions 11 and 12 at the machine table 1 supported.

The embossing unit 2 at least consists of a housing 15 , from a drive 16 , from a gripper 17 and a stamp 7 ,

The housing 15 is in the longitudinal directions 11 and 12 longitudinally movable and at least in the first longitudinal direction 11 blockable. In addition, the housing 15 transverse to the longitudinal directions 11 and 12 at the machine table 1 supported.

The stamp 7 is relative to the housing 15 in the longitudinal directions 11 and 12 movable in the housing 15 stored. Besides, the stamp is 7 transverse to the longitudinal directions 11 and 12 in the case 15 supported. Furthermore, the stamp 7 through the drive 16 by means of the second longitudinal direction 12 Directed longitudinal forces acted upon and against the press-in, embossing or caulking in the longitudinal direction 11 at the Ge housing 15 supported.

1b shows the detail Z 1 enlarged and not to scale. - The gripper 17 has, for example, one or more contact zones 18 on, which can be longitudinal stops. The contact zone 18 is in the longitudinal direction 11 directed and is at least one in the first longitudinal direction 12 directed contact zone 19 a fork end 13 can be positioned opposite. The contact zone 19 at the fork end 13 lies another contact zone 20 an opposite fork end 13 the fork 10 along opposite. Also this contact zone 20 For widening is usually engaged behind by a further gripper, not shown, a preferably further device of the type.

• – Der Greifer 17 ist an der Prägeeinheit 2 unverrückbar fest. In diesem Fall muss die Prägeeinheit 2 quer zu den Längsrichtungen 11 und 12 zumindest auslenkbar sein.
• – Der Greifer 17 ist längs an der Prägeeinheit 2 fest aber in Querrichtungen verschiebbar.
• – Der Greifer 17 ist eine Mechanik, mit der das Gabelende 13 im Gabelmaul 22 hintergriffen und wieder freigegeben werden kann. Beispiele dafür sind Kniehebelmechaniken, Zangen, Backenfutter oder ähnliches.

The gripper 17 is at the embossing unit 2 preferably on the housing 15 at least longitudinally fixed and thus together with the housing 15 or together with the embossing unit 2 longitudinally movable and transversely movable but stationary at least detectable. By "transversely movable but at least fixed in place" is to be understood that the longitudinal stop 18 on the gripper 17 in the in 1b and 1 with the arrow 26 symbolized transverse directions in the fork mouth 22 can be led in and out. These are conceivable on their own or together with another following embodiments of the invention:

• - The gripper 17 is at the embossing unit 2 immovably firm. In this case, the embossing unit 2 transverse to the longitudinal directions 11 and 12 be at least deflectable.
• - The gripper 17 is longitudinal to the embossing unit 2 fixed but displaceable in transverse directions.
• - The gripper 17 is a mechanic with the fork end 13 in the fork mouth 22 can be intervened and released again. Examples are toggle mechanisms, pliers, jaw chuck or similar.

The joint 10 is by means of recording 4 kept stationary against the longitudinal forces. This is the recording 4 , which preferably has a clamping device, fixed to the machine table 1 ,

The support block 3 is limited longitudinally movable and in the same longitudinal direction 11 like the embossing unit 2 lockable against longitudinal movements. In all transverse directions is the support block 3 stationary. The housing 15 is in the longitudinal direction 11 against the support block 3 supportable.

The actuator 6 is supported at least stationary and has at least in the longitudinal directions 11 and 12 driven adjustable actuator 8th on.

• – in Richtungen 26 quer zu den Längsrichtungen 11 und 12 verschiebbar; Ein Beispiel ist ein Querschieber.
• – in Richtungen 26 quer zu den Längsrichtungen 11 und 12 schwenkbar und verschiebbar; Ein Beispiel ist ein zunächst quer zugeführter und dann eingeschwenkter Sperrschieber.
• – um eine in die Längsrichtungen gerichtete Schwenkachse verdreh- oder verschwenkbar; Ein Beispiel ist eine Sperr-Drehscheibe mit Durchgangslöchern.

The support block 3 is in the longitudinal directions 11 slidable by the gap S and also longitudinally fixed. In the device according to 1 is the lock 5 in the longitudinal direction 11 on the support block 3 supportable and displaceable with this by the gap S The barrier 5 is to block the relative longitudinal movement of the embossing unit 2 to the support block 3 in the range of motion of the embossing unit 2 transversely movable and forms the first longitudinal stop 55 , The first longitudinal stop 55 lie along two second longitudinal stops 56 in the form of the support columns 24 across from. By "transversely movable" is alternatively to be understood in this case:

• - in directions 26 transverse to the longitudinal directions 11 and 12 slidably; An example is a cross slide.
• - in directions 26 transverse to the longitudinal directions 11 and 12 pivotable and movable; An example is a first cross-fed and then pivoted gate valve.
• - Rotatable about a pivot axis directed in the longitudinal directions or pivotable; An example is a locking turntable with through holes.

The gripper 17 stands out of the embossing unit 2 or from the housing 15 out. The gripper 17 is in the fork mouth 22 transversely insertable and longitudinally against the fork end 13 can strike. On the embossing unit 2 or on the housing 15 either the support block follows 3 or optionally the lock 5 , On the support block 3 follows either the lock 5 or the actuator 6 , The barrier 5 and the support block 3 or the lock 5 and the actuator 6 are alternatively arranged parallel to each other. The embossing unit 2 or the housing 15 the embossing unit 2 is in the longitudinal direction 11 relative to the support block 3 movable and temporarily over the lock 5 on the support block 3 supportable.

The fork end 13 is through the gripper 17 in the longitudinal direction 11 elastically movable and at the same time in the longitudinal direction 12 in the area of the fork eye 23 in the opposite direction (longitudinal direction 12 ) by the one with the stamp 7 applied applied mounting forces. The mounting forces on the stamp 7 are in the longitudinal direction 12 directed longitudinal forces. The stamp 7 is against the reactions of the longitudinal forces in the longitudinal direction 11 on the housing 15 supported. The housing 15 is anxious in the longitudinal direction due to these reactions 11 to dodge and supports itself in the longitudinal direction 11 either directly on the support block 3 or at the between the case 15 and the support block 3 engaging lock 5 from. In the latter case, the reactions of the housing 15 over the lock 5 to the support block 3 passed. Between the support block 3 and the actuator 6 is the gap S adjustable. In the device according to 1 is the gap S by means of the actuator 8th adjustable.

The support block 3 is the gap S in the longitudinal direction 11 against the actuator 6 longitudinally displaceable and after overcoming the gap S on the actuator 6 longitudinally supportable. The support block 3 strives to keep these reactions in the longitudinal direction 11 to avoid, thereby overcomes the gap S in this direction and finally supported after overcoming the gap S longitudinally fixed to the actuator 6 from.

From the embossing unit 2 or from the housing 15 stands in the longitudinal direction 11 at least one support column 24 (preferably two pieces) stand out. The support column 24 is either at least as long as the distance between the embossing unit 2 and the support block or between the housing 15 and the support block 3 if in the device no lock 5 is provided - or as in 1 shown as long as the distance A between the housing 15 and the lock 5 if this in the with 5 ' marked position the bushings 25 blocked against immersion of the support columns. The distance A is set when the fork 10 inserted into the device for mounting and the fork end 13 with the gripper 17 is behind. In this state, the lock is 5 in the dashed line 5 ' marked position and the support columns 24 are in the longitudinal direction 11 at the lock 5 supported. The barrier 5 in turn, it leans in the longitudinal direction 11 on the support block 3 from. Between the support block 3 and the actuator 8th is the gap S set.

When the assembly is finished, or after inserting a new fork 10 into the device 9 , the gripper needs 17 from the fork mouth 22 to be moved out. This requires the gripper 17 not only in the longitudinal directions 26 moved but also in the longitudinal direction 11 be moved. Accordingly, the support block 3 and possibly also the lock 5 (eg locking turntable) or both the lock 5 as well as the support block 3 with one implementation each 25 per support column 24 Mistake. The support column 24 then dives in the longitudinal direction 11 in the implementation 25 and if necessary through the elements 3 and 5 through - and even through holes if necessary 43 in the machine table through or into when the embossing unit 2 out of / into the area where the fork is 10 is inserted, moved in or out.

During assembly, the gripper sees in the longitudinal direction 11 and at the same time push the assembly staff of the punch 7 in the longitudinal direction 12 , In this case, the embossing unit is supported 2 or the housing 15 against the reactions of the assembly forces via the support column 24 right at the lock 5 from. Alternatively, the support column can 24 the support block 3 support directly. The support block 3 may in the latter case, for example, one in the longitudinal directions 11 and 12 aligned pivot axis so be pivotable, so that the lock 5 completely eliminated. Dipping the support columns in the bushing 25 is then prevented by performing 25 from the range of movement of the support column 24 is pivoted.

Because the support block 3 is slidable by the gap S, this is due to the elastic yielding to the fork 10 to the gap S against the actuator 8th move. The actuator 8th in this state in the longitudinal direction 11 stationary.

Description of the Drawings - Actuator ( 1 )

The actuator 6 can be constructed as follows: The actuator 6 indicates the actuator 8th with a second stop 48 as well as an actuator 44 on. The second stop 48 lies the first stop 54 on the support block 3 along opposite. Between the attacks 48 and 54 the gap is formed. The actuator 8th is longitudinally movable and steplessly lockable in different positions. In the example below 2 is the actuator 8th an adjusting spindle 45 a linear actuator and in an adjusting nut 46 rotatable and longitudinally movable. The adjusting nut 46 is stationary. At the adjusting spindle 45 engages a rotary drive directly or with the interposition of a geared connection, not shown 47 on, which may be formed, for example, electric motor, pneumatic or hydraulic acting. Alternatively, the actuator 8th for example pneumatically or hydraulically driven linearly with or without intermediate geared connection.

Between the rotary drive 47 is a linear actuator 49 arranged. This linear actuator 49 is a coupling between the spindle 45 and the rotary drive 47 , The rotationally driven spindle 45 moves in one of the longitudinal directions 11 / 12 , The rotary drive 47 However, it is fixed in the longitudinal direction. The linear actuator 49 equals itself between the spindle 45 and the rotary drive 47 while longitudinally varying distance without the rotational connection between the rotary drive 47 and the spindle 45 is interrupted.

Description of one with a Device according to the invention implemented method

• 1. Herausfahren der Prägeeinheit oder des Greifers aus dem Bereich in den die Gabel eingelegt wird – gemeint ist damit: ”Platz machen” für das Einlegen der Gabel Einlegen der Gelenkwelle beziehungsweise der Gabel in die Vorrichtung;
• 2. Zuführen der Prägeeinheit
• 3. Hintergreifen des Gabelendes mit dem Greifer
• 4. Greifer durch geringfügiges Herausfahren der Prägeeinheit zwecks Spielfreiheit bis auf Anschlag am Gabelende bringen
• 5. Sperren der Stützsäulen
• 6. Spalt ”S” einstellen
• 7. Montieren des Gelenkkreuzzapfens und Büchse – zeitgleiches Aufweiten und Einpressen beziehungsweise Prägen

The method is characterized by the following steps

• 1. Moving out of the embossing unit or the gripper from the area in which the fork is inserted - this means: "make room" for the insertion of the fork inserting the propeller shaft or fork in the device;
• 2. Feeding the embossing unit
• 3. Grasping the fork end with the gripper
• 4. Bring gripper by slight removal of the embossing unit for the purpose of backlash to the stop at the fork end
• 5. Locking the support columns
• 6. Set gap "S"
• 7. Assembly of the joint cross pin and bushing - at the same time expanding and pressing in or embossing

Description of another realized with a device according to the invention process

• 1. Herausfahren der Prägeeinheit oder des Greifers aus dem Bereich in den die Gabel eingelegt wird – gemeint ist damit: ”Platz machen” für das Einlegen der Gabel – und Einlegen der Gelenkwelle beziehungsweise der Gabel in die Vorrichtung;
• 2. Zuführen der Prägeeinheit
• 3. Hintergreifen des Gabelendes mit dem Greifer
• 4. Greifer durch geringfügiges Herausfahren der Prägeeinheit zwecks Spielfreiheit bis auf Anschlag am Gabelende bringen
• 5. Sperren der Stützsäulen
• 6. Die Gabel wird über den Greifer mittels definierter Zugkraft (statt wie oben über den definierten Weg), aufgeweitet Z. B. über den Antrieb der Prägeeinheit in Richtung 11.
• 7. Spalt ”S” wird auf „0” eingestellt gegebenenfalls kann die Aufweitbewegung um einen Korrekturwert überdrückt werden.
• 8. Montieren des Gelenkkreuzzapfens und Büchse – zeitgleiches Aufweiten und Einpressen beziehungsweise Prägen

The method is characterized by the following steps:

• 1. Moving out of the embossing unit or the gripper from the area in which the fork is inserted - meaning is: "make room" for the insertion of the fork - and insert the propeller shaft or fork in the device;
• 2. Feeding the embossing unit
• 3. Grasping the fork end with the gripper
• 4. Bring gripper by slight removal of the embossing unit for the purpose of backlash to the stop at the fork end
• 5. Locking the support columns
• 6. The fork is widened via the gripper by means of a defined tensile force (instead of the above defined way), for example via the drive of the embossing unit in the direction 11 ,
• 7. Gap "S" is set to "0" if necessary, the expansion movement can be overstroed by a correction value.
• 8. Mount the articulated cross pin and bushing - at the same time expanding and pressing in or embossing

Description of the Drawings - Embossing unit and example of a longitudinal adjustment unit ( 1 . 2 . 3 )

The embossing unit 2 can be constructed as follows: The drive 16 consists of at least one engine 27 and a linear drive 28 , The motor 27 is preferably an electric motor, but is also an alternative to all other conceivable drives. Between the engine 27 and the linear drive 28 is optionally a geared connection 29 educated. The geared connection 29 is in the device 9 through two gears 30 and 31 educated. Alternatively, the engine can 27 also directly on the linear drive 28 attack.

The linear drive 28 For example, is a screw (preferably a screw) from at least one spindle 32 and at least one mother 33 , Alternatively, the linear drive 28 pneumatically or hydraulically actuated and formed in this case by at least one piston in a cylinder plus the corresponding control unit.

The mother 33 is with warehouses 35 rotatable but in longitudinal directions 11 / 12 firmly to the housing 15 stored. The spindle 32 is non-rotatable but in the longitudinal directions 11 / 12 movable and with the stamp 7 connected. A non-rotatable support of the spindle 32 is ensured, for example, that the otherwise round cross-section of the spindle 32 and the stamp 7 at least one flat 34 for example, in the form of a key area. Alternatively, the profile is provided at this point with a spline, a hexagon or other suitable for longitudinal displacement profiles known for this purpose in mechanical shaft-hub connections. With these flattenings 34 corresponds to the contour of a linear guide 38 , in a simplest version, first to the housing 15 is rotationally stable. Rotary movements of the mother 33 result in longitudinal displacements of the spindle 32 and thus the stamp 7 , which is rotatably connected to the spindle.

Description of the Drawings - Embossing unit and example of a stamp ( 1 . 2 . 3 )

The Stamp 7 is production-dependent interchangeable, is formed one or more parts and has essentially two functional elements. One is the stamp 7 first an injection punch, with the universal joint bushes in corresponding fork eyes 23 be pressed. The other is the stamp 7 an embossing stamp with embossed nose 36 ( 2 ). These embossingases 36 Follow the punch in the longitudinal direction and displacing the embossing / caulking plastically material from the fork eye 23 against the can bottom.

Description of the Drawings - Embossing Unit - Swivel Unit ( 1 and 3 )

It happens that the material to be caulked is very tough and the necessary forces for plastic displacement Therefore, when caulking are very high. As a result, only little material will be displaced, so the holding power the embossing / caulking produced with a stroke is low.

It also happens that too little space (small diameter of the universal joint cans and thus small diameter of the fork eye) available stands and consequently the stamp with insufficient or with insufficiently large embossing noses on the circumference As a result, each hub can either only for the necessary holding force too little or too weak embossing nose / caulking be generated.

In both cases, ver with two strokes braces twice as much and thus produces a sufficient number of caulkings. This is the stamp 7 after the first stroke, first around its central axis 37 so far turned up the embossing nose 36 take a different position to the first stroke on the circumference and then re-embossed with the second stroke.

The spindle 32 or the stamp 7 are therefore around the central axis 37 rotatable. In the example below 1 is the linear guide 38 adjustable and with bearings 39 to the housing 15 rotatably supported but also held in rotation at least then rotatably when the punch 7 must be moved longitudinally. The twisting is done for example with a drive and a geared connection between the drive and the linear guide. In the example below 1 and 3 is the linear guide 38 circumferentially with a toothing 40 Mistake. In this gearing 40 For example, grab two racks 41 one. These racks 41 are along the central axis 42 driven and lockable against this movement. Blocking can be done via the holding force of the drives or by means of suitable separate elements (eg clamping cartridges) by driving the racks 41 is the linear guide 38 and thus the stamp 7 as initially described rotatable.

3 - Shows a cross section through the embossing unit 2 along the central axes of the racks 41 , The racks 41 lie opposite each other, so that the effects transverse to the central axis 37 directed tooth forces from adjusting movements of the racks 41 on the stamp 7 to each other The racks 41 are pneumatically operated and therefore each with a piston 50 connected. Every piston 50 is in a pneumatic cylinder 51 guided and acted on both sides. When turning the stamp 7 around the central axis 37 are the parallel aligned racks 41 driven in opposite directions.

1

machine table

2

embossing unit

3

support block

4

admission for joint forks

5

barrier

6

actuator

7

stamp

8th

actuator

9

contraption

10

fork

11

longitudinal direction

12

longitudinal direction

13

fork end

14

axis of symmetry the propeller shaft

15

casing the embossing unit

16

drive of the stamp

17

grab

18

zone of contact on the gripper

19

longitudinal stop at the fork end

20

longitudinal stop at the fork end

21

Joint bush

22

fork jaw

23

fork eye

24

support column

25

execution

26

arrow

27

engine

28

linear actuator

29

getriebliche connection

30

gear

31

gear

32

spindle

33

mother

34

flattening

35

camp

36

embossing nose

37

central axis

38

linear guide

39

camp

40

gearing

41

rack

42

central axis

43

hole

44

actuator

45

adjusting spindle

46

adjusting nut

47

rotary drive

48

second attack

49

Linear actuator

50

piston

51

cylinder

52

spigot

53

spider

54

first attack

55

first longitudinal stop

56

second longitudinal stop

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 3537234 A1 [0008, 0011]

Claims (7)

Device for mounting joints comprising: - at least one receptacle ( 4 ), which are fixed to a machine table ( 4 ) is arranged and with which a spider ( 53 ) and a fork connected to a shaft ( 10 ) centered on each other and fixed to the machine table ( 4 ) are tensioned, - with at least one housing ( 15 ), which with the machine table ( 4 ), - at least one stamp ( 7 ) for pressing in a universal joint box ( 21 ) in a fork eye ( 23 ) the fork ( 10 ) and for embossing, which in the housing ( 15 ) driven back and forth longitudinally movable in the housing ( 15 ), - a longitudinal drive ( 16 ), at least along the housing ( 15 ) is supported and with which of the stamp ( 7 ) relative to the housing ( 15 ) is drivable back and forth, - with at least one clamping device, with which a clamping force for widening the fork jaw ( 22 ) on the fork ( 10 ) is transferable, - with at least one gripper ( 17 ) as part of the tensioning device with which a fork end ( 13 ) when widening the fork mouth ( 22 ) is tangible, - at least one first stop ( 54 ), which turned away from the joint and which at least temporarily synchronously with the gripper ( 17 ) is longitudinally movable in one direction, - at least one second stop ( 48 ), which is the first stop ( 54 ) longitudinally in the direction of movement of the gripper ( 17 ) and which is longitudinally movably arranged, characterized in that the housing ( 15 ) relative to the machine table ( 1 ) longitudinally movable with the machine table ( 1 ) and that the fork end ( 13 ) gripping grippers ( 17 ) at least for expansion along relative to the housing ( 15 ) and with the housing ( 15 ) is longitudinally movable. Apparatus according to claim 1, characterized in that the first stop ( 54 ) relative to the machine table ( 1 ) movable on the machine table ( 1 ) is recorded. Apparatus according to claim 1, characterized in that the first stop ( 54 ) on one longitudinally on the second stop ( 48 ) to movable support block ( 3 ) is formed, wherein at one of the first stop ( 54 ) and thus facing the fork side of the support block ( 3 ) at least temporarily with the support block ( 3 ) movable first longitudinal stop ( 55 ), one of the fork ( 10 ) facing away from the second longitudinal stop ( 56 ) of the housing ( 15 ) is opposite. Apparatus according to claim 3, characterized in that the second longitudinal stop ( 56 ) at least one longitudinally of the housing ( 15 ) from extending support column ( 24 ) is trained. Apparatus according to claim 4, characterized in that the support block ( 3 ) at least one longitudinally directed and with the support column ( 24 ) corresponding implementation ( 25 ) for the support column ( 24 ) having. Apparatus according to claim 5, characterized in that the first longitudinal stop ( 55 ) one between the support block ( 3 ) and the second longitudinal impact ( 56 ) retractable lock ( 5 ) of the implementation ( 25 ). Device according to claim 1, characterized in that the second stop ( 48 ) relative to the machine table ( 1 ) longitudinally adjustable on the machine table ( 1 ) and at least supported longitudinally.