DE102010043594B4 - Method and tool for axially securing a plain bearing bush - Google Patents

Abstract

Method for the axial fastening of a sliding bearing bush (2) on a gear shaft (1) of a vehicle, characterized in that at least one bore (3) axially parallel to the receiving bore of the plain bearing bush (2) is drilled axially into the component surrounded by the plain bearing bush (2) and the the plain bearing bush (2) facing wall of the bore (3) is deformed such that an axial movement of the plain bearing bush (2) is prevented relative to the surrounding component.

Description

The present invention relates to a method and a tool for axially securing a plain bearing bush to a transmission shaft of a vehicle according to the closer defined in the preambles of claims 1 and 5, respectively.

For example, from the document EP 0 782 484 B1 is a method for producing a compound of an insert in a tubular part by means of flanging known. In the known method, the insert part is inserted from a front end into the tubular part and comes in the direction of the longitudinal axis of the tubular part to a stop to the plant. By beading the protruding edge of the tubular part on the insert this is set. This results in the disadvantage that by flanging the entire circumference of the protruding edge a component surrounding the tubular part can be damaged.

Furthermore, it is also known that for axially securing a plain bearing bush to an output shaft of a transmission, caulking is performed by hand with a grain. However, this procedure has the disadvantage that no process reliability is given in a mass production process.

Furthermore, from the patent applications DE 102004063074 A1 and DE 19741562 A1 Constructions are known in which for axially securing a sleeve in a tubular member, a compression process is provided which deforms the tubular member to form a stop. The compression process adversely affects the geometric environment of the security zone due to the fact that the compressed material can flow away only laterally. Thus, elements to be protected in the vicinity can be deformed. If such an upsetting process is used, for example, near an oil bore with sealing plugs, considerable impairment of function is to be expected, since even small deformations on the sealing geometry can lead to leakage.

Further possibilities for joining two components by means of compression process, for example, from JP 2007-234091 A known.

The present invention is based on the object to provide a method and a tool for axially securing a plain bearing bush to a transmission shaft of a vehicle, which meet the requirements of a series production process with sufficient process reliability, and also prevent damage to the surrounding of the plain bearing bush component.

This object is achieved by a method having the features of claim 1 or by a tool with the features of claim 5, wherein advantageous embodiments of the respective dependent claims and the drawings.

The object underlying the invention is thus achieved by a method for axially securing or securing a plain bearing bush to a transmission shaft of a vehicle, wherein at least one bore is drilled axially at a predetermined position in the component surrounding the plain bearing bush and at least facing the plain bearing bushing Wall of the bore is deformed such that an axial movement of the plain bearing bush is prevented relative to the surrounding component.

In this way, a caulking of the output shaft bushing by means of Bohrungswandverformung is made possible with the inventive method, so that an axial migration of the plain bearing bush is excluded relative to the output shaft during operation. Since the caulking takes place only at predetermined local areas, namely in the area of the bores introduced, damage to the component surrounding the slide bearing bush or to the transmission shaft or output shaft can be reliably prevented.

The caulking or the positive deformation can be realized in the proposed method, that in each bore a caulking or the like is introduced, with which the wall of the bore is deformed radially inwardly, so that an axial stop or the like formed for the plain bearing bush becomes.

Preferably at a z. B. transverse bores for oil supply provided output shaft can be provided that a plurality of bores spaced apart at a certain angle holes are drilled axially in the output shaft on an end face, so that in each case an associated Verstemmelement can be introduced. The holes can be arranged evenly or unevenly distributed over the circumference, depending on the positions at which deformation or caulking is to take place.

The object underlying the invention is also achieved by a tool for axially securing the plain bearing bush to the transmission shaft of a vehicle. The The tool according to the invention may, for example, have at least one punch body or the like which comprises at least one caulking element or the like axially projecting from its die surface for deforming at least one associated axial bore on a component surrounding the slide bearing bush or on the transmission shaft. In order to provide a guide during insertion into the interior of the sliding bearing bush, the plunger body can have at least one central guide part or the like projecting axially from the stamp surface.

Thus, the tool can be securely inserted by means of the guide member in the plain bearing bush, since the guide member is adapted to the inner diameter of the plain bearing bush accordingly. Preferably, the guide member may have a cylindrical shape or the like, wherein for better axial insertion insertion be provided. When the guide member is inserted into the plain bearing bushing with a predetermined axial depth, the axially protruding caulking members of the punching surface strike the associated bores of the surrounding member or the output shaft to be inserted therein for deforming at least the wall facing the journal bearing bushing facing wall portion.

According to a next development of the invention, it may be provided that the proposed tool has an approximately circular or similar punch surface on its punch body, the radius of the punch surface being slightly smaller than the inner radius of the plain bearing bush. The stamp surface may have at its outer radius region or on the outer circumference a plurality of caulked about each other at a predetermined angle Verstemmelemente, depending on how the holes in which the plain bearing bushing surrounded component are arranged. The cylindrical, for example, depending on the shape or design of the plain bearing bush formed guide member may preferably be centrally located on the die surface and protrude axially from this.

The deformation of each bore wall radially inward can be made possible by a variety of shapes on the caulking. According to an advantageous development of the invention, two different embodiments of the caulking elements can be preferably used, which can also be combined with each other. On the one hand, a caulking surface may be approximately planar or planar in order to displace the material radially inwards in terms of area. However, it is also possible for a curved caulking surface to be provided, so that along the longitudinal sides quasi cutting edges are formed, which initially allow a cutting into the material in the region of the bore wall and then displace the cut material radially inward. In both embodiments, the bore wall is deformed in such a form-fitting manner that an axial movement of the plain bearing bush is prevented.

• 1 eine schematische Seitenansicht einer Abtriebswelle eines Fahrzeuggetriebes mit einer Gleitlagerbuchse und einem erfindungsgemäßen Werkzeug zum axialen Befestigen;
• 2 eine Draufsicht auf die Stirnseite der Abtriebswelle gemäß 1;
• 3 eine erste mögliche Ausführung eines Verstemmelementes des erfindungsgemäßen Werkzeuges; und
• 4 eine zweite mögliche Ausführung des Verstemmelementes des erfindungsgemäßen Werkzeuges.

The present invention will be explained in more detail with reference to the drawings. Show it:

• 1 a schematic side view of an output shaft of a vehicle transmission with a plain bearing bush and a tool according to the invention for axial fixing;
• 2 a plan view of the front side of the output shaft according to 1 ;
• 3 a first possible embodiment of a caulking of the tool according to the invention; and
• 4 a second possible embodiment of the caulking of the tool according to the invention.

In 1 is an output shaft 1 as a surrounded component of a plain bearing bush 2 exemplified in a bore of the output shaft 1 for example, is pressed to size.

In the context of the method according to the invention are at the plain bearing bush 2 facing end face of the output shaft 1 several axially aligned holes 3 drilled, which are spaced over the circumference at an angle of 120 ° from each other, leaving the three holes 3 no eg transverse oil supply holes 4 in the output shaft 1 affect. In a next process step, only one of the plain bearing bush 2 facing wall portion of each hole 3 deformed radially inwardly, so that an axial stop for the plain bearing bush 2 is formed and thus an axial movement of the plain bearing bush 2 relative to the output shaft 1 is prevented.

Out 2 it can be seen that the axially aligned holes 3 already in the output shaft 1 are present, these evenly over the circumference of the end face of the output shaft 1 are distributed. 1 shows that in the holes 3 already the tool required for caulking with his punch body 5 in the plain bearing bush 2 is introduced.

According to 3 and 4 are two possible embodiments of the tool according to the invention for axially securing the plain bearing bush 2 on the output shaft 1 shown. The tool comprises an approximately cylindrical punch body 5 , which has an approximately circular stamp surface 7 is provided. The stamp area 7 is with axially projecting or raised Verstemmelementen 6 . 6A provided in the region of the outer edge of the stamp surface 7 are arranged evenly distributed over the circumference. Center on the stamp area 7 is an approximately cylindrical guide part 8th provided with the punch body 5 during axial insertion into the plain bearing bush 2 is guided along the Innendruchmessers. Therefore, the outer diameter of the guide part 8th slightly smaller than the inner diameter of the plain bearing bush 2 , Furthermore, the guide part 8th on its front side an insertion bevel over the entire circumference on to the insertion into the plain bearing bush 2 to simplify.

The caulking elements 6 according to 3 are raised bodies on the stamp surface 7 , each a plane or in a plane extending caulking 9 exhibit. The caulking surface 9 runs starting from the stamp surface 7 from radially inward to radially outward at a predetermined angle, so that during the axial insertion of the stamper body 5 the plain bearing bush 2 facing wall material of each hole 3 is correspondingly displaced and thus an axial stop for the plain bearing bushing 2 in the field of drilling 3 is provided.

In contrast, the caulking 6A according to 4 with a curved caulking surface 9A executed, which also starting from the stamp surface 7 extends radially inwardly at a predetermined angle radially outward. However, due to the curved shape of the caulking 9A on the longitudinal sides two mutually parallel cutting edges 10 formed, with which the material is cut in the region of the inner wall in the associated bore during axial insertion and is then deformed inwardly. The curvature of the caulking surface 9A is in the embodiment shown in the direction of the stamp surface 7 arched. However, other bulges are possible.

Regardless of the two versions, the caulking can 6 . 6A detachable on the punch body 5 be arranged so that in a wear advantageous simple replacement is possible.

LIST OF REFERENCE NUMBERS

1

output shaft

2

plain bearing bush

3

drilling

4

Oil supply hole

5

stamp body

6.6A

caulking

7

stamp surface

8th

guide part

9,9A

caulking

10

cutting edge

Claims (9)

Method for the axial fastening of a sliding bearing bush (2) on a gear shaft (1) of a vehicle, characterized in that at least one bore (3) axially parallel to the receiving bore of the plain bearing bush (2) is drilled axially into the component surrounded by the plain bearing bush (2) and the the plain bearing bush (2) facing wall of the bore (3) is deformed such that an axial movement of the plain bearing bush (2) is prevented relative to the surrounding component. Method according to Claim 1 , characterized in that in each bore (3) a Verstemmelement (6, 6A) is introduced, with which the wall of the bore (3) is deformed radially inwardly, so that an axial stop for the plain bearing bush (2) is formed. Method according to Claim 2 , characterized in that the bore wall (3A) of the bore (3) from the view of the bore (3) displaced radially inward and in the direction of the plain bearing bush (2) is widened. Method according to Claim 2 or 3 , characterized in that a plurality of spaced approximately at an angle of 120 ° ete holes (3) are drilled axially in the formed as a surrounding component gear shaft (1), wherein in each bore (3) each have an associated Verstemmelement (6, 6A) is introduced. Tool for axially securing a plain bearing bush (2) to a gear shaft (1) of a vehicle, characterized in that at least one plunger body (5) is provided, which at least one of its stamp surface (7) axially projecting Verstemmelement (6, 6A) for deforming the wall of at least one associated bore (3) on a sliding bushing (2) surrounded component and at least one of the punch surface (7) axially projecting central guide member (8) for insertion into the interior of the plain bearing bush (2), wherein these associated Bore (3) is aligned axially parallel to the receiving bore of the plain bearing bush (2). Tool after Claim 5 , characterized in that the approximately circular punch surface (7) at its outer radius region a plurality of approximately at an angle of 120 ° spaced apart Ver temm element (6, 6A), wherein the cylindrical guide member (8) is arranged centrally on the die surface (7). Tool after Claim 6 , characterized in that each Verstemmelement (6) has at least one starting from the stamp surface (7) from radially inward to radially outward at a predetermined angle extending planar Verstemmfläche (9). Tool after Claim 6 , characterized in that each Verstemmelement (6A) at least one starting from the stamp surface (7) from radially inward to radially outwardly extending arched caulking (9A), so that two mutually parallel cutting edges (10) are provided. Tool after one of Claims 6 to 8th , characterized in that at least one Verstemmelement (6, 6A) is detachably arranged on the punch body (5).

Images