EP0734815B1 - Pulling tool for removing bearings - Google Patents

Pulling tool for removing bearings Download PDF

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Publication number
EP0734815B1
EP0734815B1 EP96103022A EP96103022A EP0734815B1 EP 0734815 B1 EP0734815 B1 EP 0734815B1 EP 96103022 A EP96103022 A EP 96103022A EP 96103022 A EP96103022 A EP 96103022A EP 0734815 B1 EP0734815 B1 EP 0734815B1
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EP
European Patent Office
Prior art keywords
gripping
sleeve
fingers
control surface
elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96103022A
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German (de)
French (fr)
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EP0734815A1 (en
Inventor
Hans Joachim Peffeköver
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Johann Peffekover & Co KG Werkzeugfabrik GmbH
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Johann Peffekover & Co KG Werkzeugfabrik GmbH
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Publication of EP0734815A1 publication Critical patent/EP0734815A1/en
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Publication of EP0734815B1 publication Critical patent/EP0734815B1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/06Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting or withdrawing sleeves or bearing races

Definitions

  • the invention relates to a removal tool for bearing rings, in particular Tapered roller bearing inner rings, with one gripping sleeve, the several has resilient gripping fingers distributed over its circumference, which on their free ends with radially inward or outward extending gripping elements for Behind the bearing ring are provided, and with an adapter sleeve has a control surface acting against the end regions of the gripping fingers, which with a relative movement between the clamping sleeve and gripping sleeve Gripping elements pushes inwards or outwards.
  • the adapter sleeve is usually a cylindrical component, the gripping elements are usually claw-shaped ends of the gripping fingers.
  • the Control surfaces of the adapter sleeve are usually conical and cause either with a relative movement of the adapter sleeve in the pulling direction of the Bearing rings (DE-GM 94 00 044) or with a relative movement in the opposite direction (DE-AS 12 69 069) a compression of the Gripping fingers, whereby the gripping elements engage behind the bearing rings.
  • the adapter sleeve has an opening diameter at the end of the resilient gripper fingers which is slightly larger than the outer diameter of the bearing ring. This ensures that the bearing ring can easily be removed from the adapter sleeve can be removed and that the gripping fingers by a relatively short movement can be brought into engagement with the bearing ring.
  • a disadvantage of this known Pulling tools is that the gripping sleeve when clamping the gripping fingers in such a position must be held that the gripping fingers extend beyond the bearing ring and the gripping elements during tensioning reach behind the bearing ring through the adapter sleeve. In the event of incorrect handling the gripping sleeve, it is possible for the gripping elements of the gripping fingers are pressed from the outside against the bearing ring by the adapter sleeve, without resorting to it.
  • a puller is known from DE-GM 94 02 355, which also has the features of the preamble of independent claim 1 and forms the closest prior art to the present.
  • This puller is with a tensioning element for tensioning the Gripping elements inside an expansion element located in the gripping sleeve connected, which spreads the gripping elements outwards.
  • This is it possible to use a gripping sleeve in the elastically neutral position the gripper finger has a slightly smaller diameter in the area of the gripper elements has than the bearing ring.
  • the bearing ring presses the gripper fingers outwards until they reach their gripping position to reach.
  • the gripper fingers spring back due to their elasticity inwards so that they can be tightened using the adapter sleeve are in the gripping position engaging behind the bearing ring.
  • this Puller is an additional component due to the expansion element to provide the manufacturing costs and the vulnerability of the tool increased against damage.
  • fasteners projecting outward between the tensioning element and the expansion element There are protrusions that create a risk of injury.
  • the object of the invention is to develop the known removal tools in such a way that without the need for an additional expansion element Snap the gripping fingers into the gripping position as well as the reliable one Release of the removed bearing ring is made possible.
  • the clamping sleeve has a second control surface, which during a relative movement between Clamping sleeve and gripping sleeve presses the gripping fingers inwards and the against an area of the gripper fingers located at a distance from the free end acts.
  • the distance is chosen so that the resilient material of the gripper fingers a resilient between the second control surface and the gripping elements Allows movement of the gripping elements outwards.
  • the adapter sleeve is designed such that it is in the neutral position of the resilient Gripper finger completely releases the bearing ring. This is one easy removal of the bearing ring from the adapter sleeve ensured.
  • the additional one located at a distance from the free end of the gripper fingers Control surface of the clamping sleeve, it is possible to slide the gripper fingers before sliding them on to move the adapter sleeve into a "standby position".
  • In the gripping sleeve has this ready position in the end region of its gripping fingers a diameter that is slightly smaller than the outer diameter of the bearing ring.
  • the removed bearing ring is removed by using both control surfaces completely release the gripping fingers of the gripping sleeve so that the Gripping elements in the relaxed state of the resilient gripper fingers the bearing ring no longer reach behind.
  • every ramp is suitable as a control surface that is against an abutment the gripping elements of the gripping sleeve acts.
  • These are advantageously Control surfaces - as in the prior art - conical and act against the radial displacement of the adapter sleeve relative to the gripping sleeve Gripping elements.
  • the conical control surfaces oppose the pulling direction of the bearing ring, i.e. towards the gripping elements of the gripping fingers.
  • the abutment for the second conical control surface of the adapter sleeve is preferably by a ring collar at the root area of the gripping fingers educated.
  • a stop for the bearing ring can be located within the gripping sleeve be provided, which is preferably annular.
  • the independent claim 7 relates to a puller for a bearing outer ring located in a bore.
  • the characteristics of the The preamble of this claim is from US-A-4,852,235 known.
  • the outside diameter of the gripping elements in the neutral position of the gripper fingers slightly larger than that Inner diameter of the bearing ring to be removed.
  • the subject matter of claim 7 is also characterized by a second control surface.
  • the operation of the two control surfaces of the Clamping part is identical to the operation of the control surfaces of the Clamping sleeve from claim 1, with the difference that the gripping elements be moved radially outward.
  • the tool shown in FIGS. 1 to 3 consists of a gripping sleeve 1 with four resilient gripping fingers distributed regularly over its circumference 2.
  • the gripping sleeve 1 is for removing tapered roller bearing inner rings 11 provided. For this reason, the inner end areas run the gripper finger 2 is conical.
  • the ends of the gripper fingers 2 face each other radially inwardly extending, claw-shaped gripping elements 3.
  • Of the upper area of the gripping sleeve 1 is provided with a connecting thread 10, onto which a puller spindle holder (not shown) can be screwed.
  • FIG. 2 The removal process with this gripping sleeve 1 is shown in FIG. 2.
  • the Clamping sleeve 6 presses against it with its lower conical control surface 7 the conical peripheral surface 8 of the end region of the gripping sleeve 1.
  • the gripping elements 3 are moved radially inward and engage behind the Rolling the tapered roller bearing inner ring 11.
  • a second conical one Control surface 9 which cooperates with an annular collar 5 of the gripping sleeve 1.
  • the ring collar 5 is located in the root area of the gripping fingers 2 Gripping sleeve 1, i.e. just behind the area where the cylindrical Split gripping sleeve into gripping fingers 2.
  • the collar 5 at the point where circular openings 4 merge into the longitudinal gap 12 in the gripping sleeve wall Separate two gripper fingers 2 from each other.
  • the location of the collar 5 is to be selected on the one hand so that the area between the closed cylindrical section of the clamping sleeve 1 and the collar 5 sufficient Has spring elasticity to deflect the gripping fingers 2 by the pressure of the control surface 9 on the collar 5.
  • the collar 5 must be a sufficiently large distance from End of the gripper fingers 2, so that the gripper fingers 2 between the collar 5 and the gripping elements 3 located at their ends are sufficient Have spring elasticity to spring the gripping elements 3 to the outside to enable.
  • the inner diameter of the gripping sleeve 1 in the area of Gripping elements 3 a little smaller than the largest outside diameter of the Tapered roller bearing inner ring 11 at the lower end of its rollers.
  • the gripping elements 3 are pressed radially outwards until they are in their end position reach behind the largest outer diameter of the tapered roller bearing inner ring 11 (see FIG. 2) and the pull-off process described above is initiated can be.
  • the tool is designed to remove cylindrical roller bearing rings or other non-tapered bearing rings are used End faces or the inner peripheral surfaces of the gripping elements 3 are conical bevel. This conical bevel causes the spreading apart the gripper finger 2 when pushed onto a cylindrical one Bearing ring.
  • the embodiment of the removal tool shown in FIG. 4 has a gripping sleeve 1 with six gripping fingers 2. Near the one with the Gripping elements 3 provided ends of the gripping fingers 2 and approximately in the Area in which the conical peripheral surface 8 in the cylindrical area passes over the gripping sleeve 1, the gripping fingers 2 point radially inwards extending projections 13. These projections 13 form a stop for the tapered roller bearing inner ring 11. This ensures that the tapered roller bearing inner ring 11 is not inserted too far into the gripping sleeve 1 becomes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Description

Die Erfindung bezieht sich auf ein Abziehwerkzeug für Lagerringe, insbesondere Kegelrollenlager-Innenringe, mit einer Greifhülse, die mehrere über ihren Umfang verteilte federnde Greiffinger aufweist, welche an ihren freien Enden mit sich radial nach innen oder nach außen erstreckenden Greifelementen zum Hintergreifen des Lagerringes versehen sind, und mit einer Spannhülse, die eine gegen die Endbereiche der Greiffinger wirkende Steuerfläche aufweist, welche bei einer Relativbewegung zwischen Spannhülse und Greifhülse die Greifelemente nach innen oder nach außen drückt.The invention relates to a removal tool for bearing rings, in particular Tapered roller bearing inner rings, with one gripping sleeve, the several has resilient gripping fingers distributed over its circumference, which on their free ends with radially inward or outward extending gripping elements for Behind the bearing ring are provided, and with an adapter sleeve has a control surface acting against the end regions of the gripping fingers, which with a relative movement between the clamping sleeve and gripping sleeve Gripping elements pushes inwards or outwards.

Derartige Abziehwerkzeuge sind seit langem bekannt und beispielsweise in der DE-AS 12 69 069, der DE-OS 41 14 994 oder dem DE-GM 94 00 044 beschrieben. Die Spannhülse ist in der Regel ein zylinderförmiges Bauteil, die Greifelemente sind meist krallenförmige Enden der Greiffinger. Die Steuerflächen der Spannhülse sind in der Regel kegelförmig und bewirken entweder bei einer Relativbewegung der Spannhülse in Abziehrichtung des Lagerrings (DE-GM 94 00 044) oder bei einer Relativbewegung in der entgegengesetzten Richtung (DE-AS 12 69 069) ein Zusammendrücken der Greiffinger, wodurch die Greifelemente die Lagerringe hintergreifen.Such pulling tools have long been known and for example in DE-AS 12 69 069, DE-OS 41 14 994 or DE-GM 94 00 044 described. The adapter sleeve is usually a cylindrical component, the gripping elements are usually claw-shaped ends of the gripping fingers. The Control surfaces of the adapter sleeve are usually conical and cause either with a relative movement of the adapter sleeve in the pulling direction of the Bearing rings (DE-GM 94 00 044) or with a relative movement in the opposite direction (DE-AS 12 69 069) a compression of the Gripping fingers, whereby the gripping elements engage behind the bearing rings.

Die Spannhülse weist am Ende der federnden Greiffinger einen Öffnungsdurchmesser auf, der etwas größer ist als der Außendurchmesser des Lagerringes. So ist gewährleistet, daß der Lagerring leicht aus der Spannhülse entnehmnbar ist und daß die Greiffinger durch eine relativ kurze Bewegung in Eingriff mit dem Lagerring bringbar sind. Ein Nachteil dieser bekannten Abziehwerkzeuge ist, daß die Greifhülse beim Spannen der Greiffinger in einer derartigen Stellung gehalten werden muß, daß die Greiffinger sich über den Lagerring hinaus erstrecken und die Greifelemente beim Spannen durch die Spannhülse den Lagerring hintergreifen. Bei einer falschen Handhabung der Greifhülse ist es möglich, daß die Greifelemente der Greiffinger durch die Spannhülse von außen gegen den Lagerring gedrückt werden, ohne diesen zu hintergreifen.The adapter sleeve has an opening diameter at the end of the resilient gripper fingers which is slightly larger than the outer diameter of the bearing ring. This ensures that the bearing ring can easily be removed from the adapter sleeve can be removed and that the gripping fingers by a relatively short movement can be brought into engagement with the bearing ring. A disadvantage of this known Pulling tools is that the gripping sleeve when clamping the gripping fingers in such a position must be held that the gripping fingers extend beyond the bearing ring and the gripping elements during tensioning reach behind the bearing ring through the adapter sleeve. In the event of incorrect handling the gripping sleeve, it is possible for the gripping elements of the gripping fingers are pressed from the outside against the bearing ring by the adapter sleeve, without resorting to it.

Aus der DE-GM 94 02 355 ist eine Abziehvorrichtung bekannt, die ebenfalls die Merkmale des Oberbegriffes dem unabhängigen Patentanspruchs 1 aufweist und den zu der vorliegenden nächstliegenden Stand der Technik bildet. Bei dieser Abziehvorrichtung ist mit einem Spannelement zum Spannen der Greifelemente nach innen ein in der Greifhülse befindliches Spreizelement verbunden, welches die Greifelemente nach außen spreizt. Hierdurch ist es möglich, eine Greifhülse zu verwenden, die in elastisch neutraler Position der Greiffinger im Bereich der Greifelemente einen etwas kleineren Durchmesser aufweist als der Lagerring. Beim Aufschieben der Greifhülse auf den Lagerring drückt dieser die Greiffinger nach außen, bis sie ihre Greifstellung erreichen. Dann federn die Greiffinger durch ihre Elastizität wieder nach innen, so daß sie sich schon vor dem Spannen mittels der Spannhülse in der den Lagerring hintergreifenden Greifstellung befinden. Bei dieser Abziehvorrichtung ist durch das Spreizelement ein zusätzliches Bauteil vorzusehen, welches die Fertigungskosten und die Anfälligkeit des Werkzeuges gegen Beschädigung erhöht. Außerdem können durch Verbindungselemente zwischen Spannelement und Spreizelement nach außen ragende Vorsprünge entstehen, die eine Verletzungsgefahr hervorrufen.A puller is known from DE-GM 94 02 355, which also has the features of the preamble of independent claim 1 and forms the closest prior art to the present. At this puller is with a tensioning element for tensioning the Gripping elements inside an expansion element located in the gripping sleeve connected, which spreads the gripping elements outwards. This is it possible to use a gripping sleeve in the elastically neutral position the gripper finger has a slightly smaller diameter in the area of the gripper elements has than the bearing ring. When pushing on the gripping sleeve the bearing ring presses the gripper fingers outwards until they reach their gripping position to reach. Then the gripper fingers spring back due to their elasticity inwards so that they can be tightened using the adapter sleeve are in the gripping position engaging behind the bearing ring. At this Puller is an additional component due to the expansion element to provide the manufacturing costs and the vulnerability of the tool increased against damage. In addition, through fasteners projecting outward between the tensioning element and the expansion element There are protrusions that create a risk of injury.

Aufgabe der Erfindung ist es, die bekannten Abziehwerkzeuge derart weiterzubilden, daß ohne Notwendigkeit eines zusätzlichen Spreizelementes das Einschnappen der Greiffinger in der Greifstellung sowie die zuverlässige Freigabe des abgezogenen Lagerrings ermöglicht wird.The object of the invention is to develop the known removal tools in such a way that without the need for an additional expansion element Snap the gripping fingers into the gripping position as well as the reliable one Release of the removed bearing ring is made possible.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Spannhülse eine zweite Steuerfläche aufweist, die bei einer Relativbewegung zwischen Spannhülse und Greifhülse die Greiffinger nach innen drückt und die gegen einen im Abstand zum freien Ende liegenden Bereich der Greiffinger wirkt. Der Abstand ist so gewählt, daß das federnde Material der Greiffinger zwischen der zweiten Steuerfläche und den Greifelementen eine federnde Bewegung der Greifelemente nach außen ermöglicht.This object is achieved in that the clamping sleeve has a second control surface, which during a relative movement between Clamping sleeve and gripping sleeve presses the gripping fingers inwards and the against an area of the gripper fingers located at a distance from the free end acts. The distance is chosen so that the resilient material of the gripper fingers a resilient between the second control surface and the gripping elements Allows movement of the gripping elements outwards.

Wie bei den oben genannten vier Druckschriften des Standes der Technik ist die Spannhülse derart ausgebildet, daß sie in neutraler Stellung der federnden Greiffinger den Lagerring vollständig freigibt. Hierdurch ist eine einfache Entnahme des Lagerrings aus der Spannhülse sichergestellt. Durch die zusätzliche, im Abstand zum freien Ende der Greiffinger liegende Steuerfläche der Spannhülse ist es möglich, die Greiffinger vor dem Aufschieben der Spannhülse in eine "Bereitschaftsstellung" zu bewegen. In dieser Bereitschaftsstellung weist die Greifhülse im Endbereich ihrer Greiffinger einen Durchmesser auf, der geringfügig kleiner ist als der Außendurchmesser des Lagerrings. Da die Greiffinger-Enden weiterhin nach außen federn können, ist es möglich, die Greifhülse über den Lagerring zu schieben, wobei in der Greifstellung der Greifhülse die Greifelemente hinter den Außendurchmesser des Lagerrings schnappen und den Lagerring so hintergreifen. Anschließend kann durch weiteres Verschieben der Spannhülse relativ zur Greifhülse mit der ersten Steuerfläche das Andrücken der Greiffinger-Enden gegen den Lagerring bewirkt werden und der Abziehvorgang eingeleitet werden.As with the above four prior art publications the adapter sleeve is designed such that it is in the neutral position of the resilient Gripper finger completely releases the bearing ring. This is one easy removal of the bearing ring from the adapter sleeve ensured. By the additional one, located at a distance from the free end of the gripper fingers Control surface of the clamping sleeve, it is possible to slide the gripper fingers before sliding them on to move the adapter sleeve into a "standby position". In the gripping sleeve has this ready position in the end region of its gripping fingers a diameter that is slightly smaller than the outer diameter of the bearing ring. As the gripper finger ends continue to follow spring, it is possible to close the gripping sleeve over the bearing ring slide, with the gripping elements behind in the gripping position of the gripping sleeve snap the outer diameter of the bearing ring and so the bearing ring reach behind. Then you can move the adapter sleeve further pressing the relative to the gripping sleeve with the first control surface Gripper finger ends are caused against the bearing ring and the pulling process be initiated.

Die Entnahme des abgezogenen Lagerrings erfolgt, indem beide Steuerflächen die Greiffinger der Greifhülse vollständig freigeben, so daß die Greifelemente im entspannten Zustand der federnden Greiffinger den Lagerring nicht mehr hintergreifen.The removed bearing ring is removed by using both control surfaces completely release the gripping fingers of the gripping sleeve so that the Gripping elements in the relaxed state of the resilient gripper fingers the bearing ring no longer reach behind.

Im Grunde ist jede Rampe als Steuerfläche geeignet, die gegen ein Widerlager der Greifelemente der Greifhülse wirkt. Vorteilhafterweise sind die Steuerflächen - wie beim Stand der Technik - konisch ausgebildet und wirken bei radialer Verschiebung der Spannhülse zur Greifhülse gegen die Greifelemente. Bei einer besonders bevorzugten Ausführungsform öffnen sich die konischen Steuerflächen entgegen der Abziehrichtung des Lagerrings, d.h. zu den Greifelementen der Greiffinger hin. Durch ein Verschieben der Spannhülse entgegen der Abziehrichtung wird damit ein Einfedern der Greifelemente nach innen bewirkt.Basically, every ramp is suitable as a control surface that is against an abutment the gripping elements of the gripping sleeve acts. These are advantageously Control surfaces - as in the prior art - conical and act against the radial displacement of the adapter sleeve relative to the gripping sleeve Gripping elements. Open in a particularly preferred embodiment the conical control surfaces oppose the pulling direction of the bearing ring, i.e. towards the gripping elements of the gripping fingers. By moving it the adapter sleeve against the pulling direction is thus a compression the gripping elements inwards.

Das Widerlager für die zweite konische Steuerfläche der Spannhülse wird vorzugsweise durch einen Ringbund am Wurzelbereich der Greiffinger gebildet.The abutment for the second conical control surface of the adapter sleeve is preferably by a ring collar at the root area of the gripping fingers educated.

Schließlich kann innerhalb der Greifhülse ein Anschlag für den Lagerring vorgesehen sein, der vorzugsweise ringförmig ausgebildet ist.Finally, a stop for the bearing ring can be located within the gripping sleeve be provided, which is preferably annular.

Der unabhängige Patentanspruch 7 bezieht sich auf ein Abziehwerkzeug für einen in einer Bohrung befindlichen Lageraußenring. Die Merkmale des Oberbegriffes dieses Anspruchs sind aus der Druckschrift US-A-4 852 235 bekannt. Bei dieser Abziehvorrichtung ist der Außendurchmesser der Greifelemente in der neutralen Position der Greiffinger etwas größer, als der Innendurchmesser des abzuziehenden Lagerrings. Zum Entfernen des abgezogenen Lagerrings müssen die Greifelemente manuell nach innen gedrückt werden. Auch der Gegenstand des Anspruchs 7 ist gekennzeichnet durch eine zweite Steuerfläche. Die Wirkungsweise der beiden Steuerflächen des Spannteils ist hier identisch zu der Wirkungsweise der Steuerflächen der Spannhülse aus Anspruch 1, mit dem Unterschied, daß die Greifelemente radial nach außen bewegt werden.The independent claim 7 relates to a puller for a bearing outer ring located in a bore. The characteristics of the The preamble of this claim is from US-A-4,852,235 known. In this puller, the outside diameter of the gripping elements in the neutral position of the gripper fingers slightly larger than that Inner diameter of the bearing ring to be removed. To remove the removed Bearing rings have to press the gripping elements inwards manually will. The subject matter of claim 7 is also characterized by a second control surface. The operation of the two control surfaces of the Clamping part is identical to the operation of the control surfaces of the Clamping sleeve from claim 1, with the difference that the gripping elements be moved radially outward.

Die Erfindung wird im folgenden beispielhaft anhand einer bevorzugten Ausführungsform unter Bezugnahme auf die beigefügten Zeichnungen beschrieben. Die Zeichnungen zeigen in

Fig. 1
ein erfindungsgemäßes Abziehwerkzeug im Längsschnitt in seiner Bereitschaftsstellung,
Fig. 2
das Werkzeug aus Fig. 1 im Längsschnitt in der Abziehstellung,
Fig. 3
das Werkzeug aus Fig. 1 und 2 in der Öffnungsstellung, die die Entnahme des Lagerrings erlaubt und
Fig. 4
eine zweite Ausführungsform des Abziehwerkzeugs mit Anschlag für den Lagerring in teilgeschnittener Darstellung in der Bereitschaftsstellung.
The invention is described below by way of example using a preferred embodiment with reference to the accompanying drawings. The drawings show in
Fig. 1
an extraction tool according to the invention in longitudinal section in its ready position,
Fig. 2
1 in longitudinal section in the pull-off position,
Fig. 3
the tool of Fig. 1 and 2 in the open position, which allows the removal of the bearing ring and
Fig. 4
a second embodiment of the removal tool with stop for the bearing ring in a partially sectioned view in the ready position.

Das in den Fig. 1 bis 3 dargestellte Werkzeug besteht aus einer Greifhülse 1 mit vier regelmäßig auf ihrem Umfang verteilten federnden Greiffingern 2. Die Greifhülse 1 ist zum Abziehen von Kegelrollenlager-Innenringen 11 vorgesehen. Aus diesem Grund verlaufen die inneren Endbereiche der Greiffinger 2 kegelförmig. Die Enden der Greiffinger 2 weisen sich radial nach innen erstreckende, krallenförmige Greifelemente 3 auf. Der obere Bereich der Greifhülse 1 ist mit einem Anschlußgewinde 10 versehen, auf das ein Abziehspindelhalter (nicht dargestellt) aufschraubbar ist.The tool shown in FIGS. 1 to 3 consists of a gripping sleeve 1 with four resilient gripping fingers distributed regularly over its circumference 2. The gripping sleeve 1 is for removing tapered roller bearing inner rings 11 provided. For this reason, the inner end areas run the gripper finger 2 is conical. The ends of the gripper fingers 2 face each other radially inwardly extending, claw-shaped gripping elements 3. Of the upper area of the gripping sleeve 1 is provided with a connecting thread 10, onto which a puller spindle holder (not shown) can be screwed.

Der Abziehvorgang mit dieser Greifhülse 1 ist in Fig. 2 dargestellt. Die Spannhülse 6 drückt mit ihrer unteren kegelförmigen Steuerfläche 7 gegen die konische Umfangsfläche 8 des Endbereichs der Greifhülse 1. Dadurch werden die Greifelemente 3 radial nach innen bewegt und hintergreifen die Rollen des Kegelrollenlager-Innenrings 11.The removal process with this gripping sleeve 1 is shown in FIG. 2. The Clamping sleeve 6 presses against it with its lower conical control surface 7 the conical peripheral surface 8 of the end region of the gripping sleeve 1. As a result the gripping elements 3 are moved radially inward and engage behind the Rolling the tapered roller bearing inner ring 11.

Im mittleren Bereich der Spannhülse 6 befindet sich eine zweite konische Steuerfläche 9, die mit einem Ringbund 5 der Greifhülse 1 zusammenwirkt. Der Ringbund 5 befindet sich im Wurzelbereich der Greiffinger 2 der Greifhülse 1, d.h. kurz hinter dem Bereich, in dem sich die zylinderförmige Greifhülse in die Greiffinger 2 aufteilt. Bei dem dargestellten Ausführungsbeispiel befindet sich der Ringbund 5 an der Stelle, wo kreisförmige Öffnungen 4 in der Greifhülsenwand in die Längsspalte 12 übergehen, die jeweils zwei Greiffinger 2 voneinander trennen. Die Lage des Ringbundes 5 ist einerseits derart zu wählen, daß der Bereich zwischen dem geschlossenen zylindrischen Abschnitt der Spannhülse 1 und dem Ringbund 5 ausreichende Federelastizität aufweist, um ein Einfedern der Greiffinger 2 durch den Druck der Steuerfläche 9 auf den Ringbund 5 zu ermöglichen. Andererseits muß der Ringbund 5 einen ausreichend großen Abstand vom Ende der Greiffinger 2 aufweisen, so daß die Greiffinger 2 zwischen Ringbund 5 und den an ihren Enden befindlichen Greifelementen 3 ausreichende Federelastizität aufweisen, um ein Federn der Greifelemente 3 nach außen zu ermöglichen.In the central area of the clamping sleeve 6 there is a second conical one Control surface 9, which cooperates with an annular collar 5 of the gripping sleeve 1. The ring collar 5 is located in the root area of the gripping fingers 2 Gripping sleeve 1, i.e. just behind the area where the cylindrical Split gripping sleeve into gripping fingers 2. In the illustrated embodiment is the collar 5 at the point where circular openings 4 merge into the longitudinal gap 12 in the gripping sleeve wall Separate two gripper fingers 2 from each other. The location of the collar 5 is to be selected on the one hand so that the area between the closed cylindrical section of the clamping sleeve 1 and the collar 5 sufficient Has spring elasticity to deflect the gripping fingers 2 by the pressure of the control surface 9 on the collar 5. On the other hand, the collar 5 must be a sufficiently large distance from End of the gripper fingers 2, so that the gripper fingers 2 between the collar 5 and the gripping elements 3 located at their ends are sufficient Have spring elasticity to spring the gripping elements 3 to the outside to enable.

Wie in Fig. 1 erkennbar, ist in der Bereitschaftsstellung, in der die Greiffinger 2 durch die Steuerfläche 9 um einen gewissen Betrag nach innen eingefedert sind, der Innendurchmesser der Greifhülse 1 im Bereich ihrer Greifelemente 3 ein wenig kleiner als der größte Außendurchmesser des Kegelrollenlager-Innenrings 11 an dem unteren Ende seiner Rollen. Beim Aufschieben der Greifhülse 1 auf den Kegelrollenlager-Innenring 11 werden die Greifelemente 3 radial nach außen gedrückt, bis sie in ihrer Endstellung den größten Außendurchmesser des Kegelrollenlager-Innenrings 11 hintergreifen (vgl. Fig. 2) und der oben beschriebene Abziehvorgang eingeleitet werden kann. Soll das Werkzeug dem Abziehen von Zylinderrollenlagerringen oder anderen, nicht kegelförmigen Lagerringen dienen, so sind die Stirnflächen bzw. die inneren Umfangsflächen der Greifelemente 3 kegelförmig abzuschrägen. Diese kegelförmige Abschrägung bewirkt das Auseinanderdrücken der Greiffinger 2 beim Aufschieben auf einen zylinderförmigen Lagerring.As can be seen in Fig. 1, in the ready position, in which the gripping fingers 2 through the control surface 9 to the inside by a certain amount are compressed, the inner diameter of the gripping sleeve 1 in the area of Gripping elements 3 a little smaller than the largest outside diameter of the Tapered roller bearing inner ring 11 at the lower end of its rollers. At the Push the gripping sleeve 1 onto the tapered roller bearing inner ring 11 the gripping elements 3 are pressed radially outwards until they are in their end position reach behind the largest outer diameter of the tapered roller bearing inner ring 11 (see FIG. 2) and the pull-off process described above is initiated can be. The tool is designed to remove cylindrical roller bearing rings or other non-tapered bearing rings are used End faces or the inner peripheral surfaces of the gripping elements 3 are conical bevel. This conical bevel causes the spreading apart the gripper finger 2 when pushed onto a cylindrical one Bearing ring.

Zur Entnahme des Kegelrollenlager-Innenrings 11 aus der Greifhülse 1 ist die Spannhülse 6 in die neutrale Stellung zu bewegen, in der die Greiffinger 2 durch ihre Eigenelastizität in die Stellung der größten Öffnung der Greifelemente 3 bewegt werden. In dieser, in Fig. 3 dargestellten Stellung übt weder die erste Steuerfläche 7 noch die zweite Steuerfläche 9 einen radialen Druck auf die Greiffinger aus, und der Kegelrollenlager-Innenring 11 kann einfach aus der Greifhülse entnommen werden.To remove the tapered roller bearing inner ring 11 from the gripping sleeve 1 to move the clamping sleeve 6 into the neutral position in which the gripping fingers 2 through their inherent elasticity in the position of the largest opening of the gripping elements 3 are moved. In this position, shown in Fig. 3 exercises neither the first control surface 7 nor the second control surface 9 has a radial one Pressure on the gripper fingers, and the tapered roller bearing inner ring 11 can simply be removed from the gripping sleeve.

Die in der Fig. 4 dargestellte Ausführungsform des Abziehwerkzeugs weist eine Greifhülse 1 mit sechs Greiffingern 2 auf. In der Nähe der mit den Greifelementen 3 versehenen Enden der Greiffinger 2 und etwa in dem Bereich, in dem die konische Umfangsfläche 8 in den zylindrischen Bereich der Greifhülse 1 übergeht, weisen die Greiffinger 2 sich radial nach innen erstreckende Vorsprünge 13 auf. Diese Vorsprünge 13 bilden einen Anschlag für den Kegelrollenlager-Innenring 11. Damit ist gewährleistet, daß der Kegelrollenlager-Innenring 11 nicht zu weit in die Greifhülse 1 eingeschoben wird. The embodiment of the removal tool shown in FIG. 4 has a gripping sleeve 1 with six gripping fingers 2. Near the one with the Gripping elements 3 provided ends of the gripping fingers 2 and approximately in the Area in which the conical peripheral surface 8 in the cylindrical area passes over the gripping sleeve 1, the gripping fingers 2 point radially inwards extending projections 13. These projections 13 form a stop for the tapered roller bearing inner ring 11. This ensures that the tapered roller bearing inner ring 11 is not inserted too far into the gripping sleeve 1 becomes.

Bezugszeichenliste:Reference symbol list:

11
GreifhülseGripping sleeve
22nd
GreiffingerGripping fingers
33rd
GreifelementGripping element
44th
Lochhole
55
RingbundRing collar
66
SpannhülseAdapter sleeve
77
erste konische Steuerflächefirst conical control surface
88th
konische Umfangsflächeconical circumferential surface
99
zweite konische Steuerflächesecond conical control surface
1010th
AnschlußgewindeConnecting thread
1111
Kegelrollenlager-InnenringTapered roller bearing inner ring
1212th
LängsspaltLongitudinal gap
1313
radialer Vorsprungradial projection

Claims (7)

  1. Pulling tool for bearing inner races, in particular taper roller bearing inner races (11), with a gripping sleeve (1) having several resilient gripping fingers (2) distributed about its circumference, whose free ends are provided with gripping elements (3) extending radially in an inward direction for gripping behind the bearing race (11), and with a clamping sleeve (6) having a control surface (7) which acts against the ends of the gripping fingers (2) and pushes the gripping elements (3) inwards in case of a relative movement between the clamping sleeve (6) and the gripping sleeve (1),
    characterised in that
    the clamping sleeve (6) has a second control surface (9) which, in case of a relative movement between the clamping sleeve (6) and the gripping sleeve (1), pushes the gripping fingers (2) inwards and acts against an area of gripping fingers (2) at a distance from the free end, the distance being such that the resilient material of the gripping fingers (2) between the second control surface (9) and the gripping elements (3) allows a springing outward movement of gripping elements (3).
  2. Pulling tool according to claim 1, characterised in that the control faces (7, 9) are tapered and effect the movement of the gripping elements (3) in case of an axial displacement of the clamping sleeve (6) relative to the gripping sleeve (1).
  3. Pulling tool according to claim 2, characterised in that the tapered control faces (7, 9) open towards the gripping elements (3) of the gripping fingers (2).
  4. Pulling tool according to claim 2 or 3, characterized in that the gripping sleeve (1) has a circular shoulder (5) in the area opposite the free end of the gripping fingers (2) which acts together with the second tapered control surface (9) of the clamping sleeve (6).
  5. Pulling tool according to at least one of the preceding claims, characterised in that a stop for the bearing race (11) is arranged inside the gripping sleeve (1).
  6. Pulling tool according to claim 5, characterized in that the stop is formed by a projection (13) extending radially inwards.
  7. Pulling tool for bearing outer races with a gripping part having several resilient gripping fingers distributed about its circumference, whose free ends are provided with gripping elements extending radially in an inward direction for gripping behind the bearing race, and with a clamping part having a control surface which acts against the ends of the gripping fingers and pushes the gripping elements outwards in case of a relative movement between the clamping part and the gripping part,
    characterised in that the clamping part has a second control surface which, in case of relative movement between the clamping part and the gripping part, pushes the gripping fingers outwards and acts against an area of the gripping fingers at a distance from the free end, the distance being such that the resilient material of the gripping fingers between the second control surface and the gripping elements allows a springing inward movement of the gripping elements.
EP96103022A 1995-03-25 1996-02-29 Pulling tool for removing bearings Expired - Lifetime EP0734815B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29505146U 1995-03-25
DE29505146U DE29505146U1 (en) 1995-03-25 1995-03-25 Removal tool for bearing rings

Publications (2)

Publication Number Publication Date
EP0734815A1 EP0734815A1 (en) 1996-10-02
EP0734815B1 true EP0734815B1 (en) 1998-10-28

Family

ID=8005928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103022A Expired - Lifetime EP0734815B1 (en) 1995-03-25 1996-02-29 Pulling tool for removing bearings

Country Status (2)

Country Link
EP (1) EP0734815B1 (en)
DE (2) DE29505146U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010010953U1 (en) * 2010-08-03 2011-11-23 Karl-Heinz Weitner Device for moving a body
CN106002830A (en) * 2016-08-09 2016-10-12 河南柴油机重工有限责任公司 Valve seat taking-up device of engine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2478757A (en) * 2010-03-16 2011-09-21 Ho Chi Entpr Co Ltd Bearing puller
CN106903648A (en) * 2017-04-25 2017-06-30 浙江日发纺机技术有限公司 A kind of spindle bearing disassembling device
CN108098310B (en) * 2017-12-30 2023-07-25 浙江崴光工贸有限公司 Press-fitting machine for automatically press-fitting product of output seat
DE102019214350A1 (en) * 2019-09-20 2021-03-25 Zf Friedrichshafen Ag Extraction device and method for extracting an inner ring of a rolling bearing

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2154867A (en) * 1936-11-17 1939-04-18 James H Robinson Bushing puller
DE1269069B (en) * 1962-08-23 1968-05-22 Albert Schrem Werkzeugfabrik Extraction device for extracting roller bearings or parts thereof from a shaft
US4852235A (en) * 1988-08-19 1989-08-01 Trease Dwaine A Bearing puller
DE4114994A1 (en) * 1991-05-08 1992-11-12 Schrem Werkzeugfab Albert DRAWING DEVICE FOR DRAWING A ROLLER BEARING FROM A SHAFT
US5276951A (en) * 1993-01-08 1994-01-11 Hpc, Inc. Tubular lock puller
DE9402355U1 (en) * 1994-02-12 1994-03-31 Kemmerich, Hugo, 51789 Lindlar Pulling tool for roller bearing rings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010010953U1 (en) * 2010-08-03 2011-11-23 Karl-Heinz Weitner Device for moving a body
CN106002830A (en) * 2016-08-09 2016-10-12 河南柴油机重工有限责任公司 Valve seat taking-up device of engine

Also Published As

Publication number Publication date
DE29505146U1 (en) 1995-05-18
EP0734815A1 (en) 1996-10-02
DE59600726D1 (en) 1998-12-03

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