DE102012206257A1 - Arrangement for fastening roll e.g. cam roller, in retainer of terminal construction in e.g. guide track, has pin and fastening element axially clamped at clamping connection and expandable in clamping connection for bracing in retainer - Google Patents

Abstract

The arrangement has a shaft on which a roller is rotatably mounted and a pin (1) for engaging with a retainer. A fastening element (2) i.e. threaded bolt or threaded pin, is provided and axially screwed with the shaft, and interacts with the pin in clamping connection. The pin and the fastening element are axially clamped at clamping connection by threading of the fastening element, and are expandable in the clamping connection for bracing in the retainer. A spring unit comprises a resilient expandable plastic ring.

Description

Field of the invention

The invention relates to an arrangement for fixing a roller according to the closer defined in the preamble of claim 1. Art

Background of the invention

Rollers are used in a variety of ways, for example as cam rollers in cam gears or as support rollers in guideways and conveyors. For attachment of rollers to connecting structures, for example, on carriers, various arrangements are known. Usually, cam rollers are screwed into through holes of the adjacent construction by a nut on the back of the adjacent construction. For example, shows DE 10 2005 060 531 A1 Such attachment for a pulley in the through hole of a machine part. However, this arrangement requires the accessibility at the back of the adjacent construction. If accessibility is not guaranteed, the roller can be attached via a thread in the bore of the adjacent construction. However, a thread in the adjacent construction is complicated to manufacture and thus expensive to manufacture.

Object of the invention

Based on the stated disadvantages of the known prior art, the invention is therefore the object of the invention to improve an arrangement of the aforementioned type, in particular easy to install and inexpensive to make.

Description of the invention

According to the invention, this object is achieved by the characterizing features of patent claim 1.

It is proposed to provide at least one fastening element which can be axially screwed into the axle and cooperates with the journal at a clamping connection. By simply screwing the fastener into the axis while pin and fastener to the clamping connection are axially clamped, whereby the clamping connection for clamping in the receptacle is expandable. Since the fastener is screwed into the axis, the preparation of a thread in the receptacle or attachment to the rear side of the adjacent construction is not required. In addition, in this way the arrangement according to the invention with few components can be easily assembled and assembled.

It is advantageous if the fastening element can be screwed in axially in the roller-facing end region of the axle. In this way, the fastening element during assembly and disassembly during screwing in and out at the roller-facing end portion of the axis at a thread in the axis can be guided and it ensures a defined axial position of the fastener. An unwanted self-clamping of the clamping connection in the receptacle of the adjacent construction can be avoided.

In a preferred embodiment of the invention, the fastening element cooperates with the pin at a cone clamping connection. By screwing the fastener in the axis pin and fastener to the cone clamping connection are axially clamped. As a result, the Konusspannverbindung is expandable and the pin clamped in the recording.

In a preferred embodiment of the invention, the conical clamping connection with cone and counter-cone is formed on the journal and on a coaxially arranged expandable clamping element. In this case, an outer cone is preferably designed on the end region of the journal facing away from the roller, the outer diameter of which reduces towards the free end of the journal. The outer cone cooperates with an inner cone on a coaxially arranged clamping ring, which is at the same time positively connected to a protruding end portion of the pin on the pin. In an axial screwing of the fastener in the axis of the clamping ring is mitbewegbar on the positive connection with the fastener and axially slidable on its inner cone on the outer cone on the journal of the axis and thereby radially expandable. In this way, the pin is frictionally clamped on the outer cone by radial expansion of the clamping ring in the receptacle.

Conveniently, the clamping ring is designed to expand axially slotted.

A simple form-fit connection between the clamping ring and the fastening element is achieved in that the clamping ring has at least partially a radial recess in a slid on the outer cone of the pin on a projecting end of the pin end portion of the inner shell, into which a radial projection on the end of the pin protruding end portion of the fastener engages. Preferably, the projection is annular circumferentially formed on the outer surface of the fastener and engages in an annular groove designed as a radial recess on the inner surface of the clamping ring.

Assembly and disassembly of the arrangement are further simplified if the positive connection between the clamping ring and fastener is designed as a resilient snap connection. Appropriately, in this case, the clamping ring is elastically stretchable while the projection on the fastener in the recess on the clamping ring snapped.

In an alternative, particularly easy to manufacture and assemble embodiment of the invention, the cone clamping connection is formed directly between pin and fastener. Preferably, in this case, an inner cone is designed on the pin whose inner diameter increases towards the end of the pin. The pin cooperates on the inner cone with an outer cone on the fastening element. In this case, by screwing in the fastening element of the outer cone on the fastening element in the inner cone on the pin axially inserted and the pin for frictional clamping in the receptacle in the region of the inner cone radially expandable.

It is advantageous if the pin has one or more axial slots in the region of the inner cone for widening.

A further alternative embodiment of the invention provides that the fastening element via coaxially arranged spring means, which are aufspreizbar by axial pressure, cooperates with the pin, wherein by screwing the fastener pin and fastener on the spring means are axially clamped and the spring means for bracing in the Recording are spreadable.

Preferably, in this case, the spring means are arranged coaxially on the fastening element on a projecting from the pin free end portion. The spring means are arranged between the pin and a stop on the free end portion of the fastener. By screwing the fastener into the axis so the spring means between pin and stop are axially clamped. At the same time, the fastener is frictionally clamped by radial spreading of the spring means in the recording.

In a preferred embodiment of the invention, the spring means on one or more successively arranged for elastic spreading flat conically executed ring shells. To increase their elasticity, the ring shells can be designed with slotted edges.

According to a particularly simple embodiment of the invention, it is provided to arrange one or more successively arranged elastically expandable star discs as a spring means. Preferably, several star discs are arranged one behind the other as an elastically expandable star disc package.

The stop at the free end portion of the fastener may be designed as a simple annular shoulder. Conveniently, the annular shoulder forms on its side facing the spring means an annular planar axial abutment surface for abutment of the spring means.

It is also advantageous if the pin forms at its free end the front side an annular planar axial abutment surface for abutment of the spring means.

An alternative embodiment of the invention provides that the spring means have at least one elastically expandable plastic ring.

Preferably, the fastener is screwed axially on a thread directly into the axis.

Preferably, an axial through hole in the axis is provided for receiving the fastening element and an internal thread is formed at the end of the roller-facing end region. At this internal thread of the axis, the fastener is screwed to an external thread at its end.

The fastening element can be designed as a simple threaded bolt or threaded pin. It is also conceivable, however, any other rod-shaped fastener with a thread.

According to a further aspect of the invention, an axial lubricant supply channel is provided for lubricant supply to the fastener starting from its roll-facing end face. This is connected via a lubricant connection with a lubricant inlet of a central lubrication to the receptacle of the connecting structure.

The lubricant inlet channel preferably extends into the end section of the fastening element enclosed in the screwed-in state by the receptacle and the pin. In this way, the lubricant connection between the lubricant inlet channel and receiving can be achieved by radially extending channels on the fastening element and pin, which can be designed as simple radial bores. A simple embodiment provides, starting from the axial end of the lubricant inlet channel form a radial connection channel to an annular groove on the outer surface of the fastener. in this connection communicates the annular groove with a pin on the inner jacket of the axial through bore of the axis outgoing radial connection channel, which leads to an annular groove on the outer surface of the pin in the region of the recording.

The arrangement according to the invention is preferably provided for fastening a cam roller.

Brief description of the drawings

The inventively constructed mounting arrangement will be explained in more detail in several preferred embodiments with reference to the accompanying drawings. Showing:

1 an axial section of an inventive arrangement in a first embodiment;

2 a single perspective view of the arrangement 1 ;

3 an axial section of an inventive arrangement in a second embodiment;

4 a single perspective view of the arrangement 3 ;

5 an axial section of an inventive arrangement in a third embodiment;

6 a perspective single view of the spring means 5 ;

7 an axial section of an inventive arrangement in a fourth embodiment.

Detailed description of the drawings

In 1 to 7 four embodiments of an inventive arrangement for mounting a roller in a receptacle of a connecting structure are shown. On an axle on a roller-facing end region, the roller, here a cam roller, is rotatably mounted via a roller bearing. At an end region facing away from the roller, the axis for engaging in the receptacle has a pin projecting on the roller 1 on. The receptacle is here exemplified as a through hole in the adjacent construction, here a housing formed. The recording can also be designed as a blind hole.

For fixing the pin 1 in the receptacle is a fastener 2 provided on the one hand on a thread directly into the axis can be screwed axially and on the other hand at a clamping connection with the pin 1 interacts. The fastener 2 is designed here as a threaded bolt or threaded pin. Here is the fastener 2 taken at a central axial through hole in the axis. The through hole has at the end of its roll-facing, from the pin 1 remote end of the axis an internal thread 3 on, the axial screwing the fastener 2 towards the roll-facing end portion of the axle. This is the fastener 2 executed at the end of his screwing provided end portion an external thread. By screwing in the fastener 2 in the internal thread 3 on the end of the axle facing away from the roller are pins 1 and fastener 2 axially clamped on the clamping connection, which is thereby radially expandable for frictional clamping in the receptacle.

At the clamping connection are pins 1 the axle and fastener 2 centered in the recording. As a result, the requirement for the manufacturing tolerances, in this case the bore tolerances of the through-bore on the adjacent construction, can be reduced in order to produce the receptacle on the adjacent construction. In addition, a simple assembly and disassembly of the preassemblable unit consisting of roller, axle and fastener 2 by simply inserting or pulling out the axle on the pin 1 in or out of the recording on the roller facing the front of the connecting structure possible.

For easy tightening and loosening of the fastener 2 on the internal thread 3 in the through hole of the axis has the fastener 2 at its roll-facing end face on a hexagon socket opening. Two at this end of the axis offset by 180 °, designed as blind holes holding openings into which a suitable tool, such as a hook wrench, can be introduced, allow when screwing the fastener 2 in the through hole of the axle a corresponding counter-hold to prevent turning of the axle. A tightening and loosening of the fastener 2 is thus possible on the side facing away from the adjacent construction front of the cam roller unit.

A stop ring is at the neck of the pin 1 Coaxially arranged on the axis and is frontally on the one hand on an annular shoulder of the axis and on the other hand in the clamped state of the arrangement of the adjacent construction.

1 shows in a first embodiment, the clamping connection in the clamped state as Konusspannverbindung between the pin 1 and a coaxial with this arranged clamping ring 4 educated. Here is the pin 1 offset radially inward and with an outer cone 5 formed, whose outer diameter is the end of the pin 1 decreased. The outer cone 5 acts with a complementary to this executed inner cone 6 on the clamping ring 4 together, the same time with the fastener 2 is positively connected. In this way, in axial clamping of the clamping ring 4 on the inner cone 6 and the pin 1 on the outer cone 5 from the free end of the pin 1 ago pushed axially and thereby radially expandable. For widening, the clamping ring 5 an axial slot 7 on.

The clamping ring 4 is with a on the cone 1 outstanding end portion of the fastener 2 positively connected. This is the clamping ring 4 in on the outer cone 5 deferred state at an end portion at the end of the pin 1 axially over. At the protruding end portion is on the inner surface of the clamping ring 4 a radial groove designed as an annular groove 8th intended. At the same time is on the pin 1 outstanding end portion of the fastener 2 on the outer jacket, an annular circumferential radial projection formed in the annular groove on the clamping ring 4 intervenes. In this case, a positive connection in the axial direction between the clamping ring 4 and fastener 2 reached. By elastic stretching of the clamping ring 4 is the projection on the fastener 2 simply snap into the ring groove.

By axially screwing the fastener 2 in the internal thread 3 at the roller-facing end portion of the axis, the fastener moves 2 towards the roll-facing end portion of the axle. It is through the in the depression 8th on the clamping ring 4 radially engaging projection of the fastener 2 the clamping ring 4 moved and on the inner cone 6 on the outer cone 5 on the cone 1 pushed axially. This will be inner cone 6 and outer cone 5 clamped against each other, the clamping ring 4 radially expanded and the pin 1 on the outer cone 5 clamped in the receptacle of the adjacent construction frictionally.

2 shows a perspective view of a preassembled cam roller unit from the roller-facing end portion of the axle. The unit consisting of roller, axle, fastener 2 and clamping ring 4 with slot 7 is at the roller end facing away from the axis of the pin 1 and clamping ring 4 easily plugged into the receptacle of the adjacent construction.

In a second embodiment according to the 3 and 4 is the cone clamping connection directly between the pin 1 and the fastener 2 educated. For this purpose, the axial through hole in the axis on the pin 1 offset radially outward and with an inner cone 9 executed, the inner diameter to the end of the pin 1 enlarged. The inner cone 9 acts with a complementary to this executed outer cone 10 on the roller facing away end portion of the fastener 2 together. By screwing in the fastener 2 in the internal thread 3 the through hole is the outer cone 10 on the fastener 2 in the inner cone 9 on the cone 1 insertable. This is the pin 1 in the area of the inner cone 9 expandable and so in the recording 2 frictionally clamped. To widen the pin 1 this points in the area of the inner cone 9 several axial slots 11 on ( 4 ).

The outer cone 10 is to the free end of the fastener 2 through an annular shoulder 12 limited, at which the outer diameter of the fastener 2 to the outer diameter of the pin 1 in the area of the inner cone 9 is widened. The ring shoulder 12 used during assembly for easy centering of the fastener 2 in the recording. It is also conceivable, the fastener 2 without the ring shoulder 12 perform.

The cone angle of the cone and counter cone of the cone clamping connection is preferably designed in both embodiments such that self-locking is ensured. In this way, a reaction to the screw on the internal thread 3 the axis and frictional grating avoided by micro-movements.

In 5 a third embodiment of an inventive arrangement is shown in the spring means 13 between cones 1 and fastener 2 are arranged as a clamping connection. The spring means 13 are radially spreadable under axial pressure. In this case, the fastener protrudes 2 at the end of the axle facing away from the roller at the end of the pin 1 at a free end portion out of the axis at which the spring means 13 between the pin 1 and a stop 14 coaxially arranged and. The stop 14 on the fastener 2 is as one on the outside diameter of the pin 1 radially expanded annular shoulder at the roller distal end of the fastener 2 executed and also serves the centering of the assembly during assembly in the recording. The spring means 13 consist of several coaxial successively arranged flachkegeligen ring shells, which are the fastener 2 enclose annularly at its free end portion in the receptacle. The Ring shells are designed as so-called star discs, which form a star disc package.

The spring means 13 , here the star disk package, are accommodated in an annular space, which in the axial direction on the one hand by the pin 1 and on the other hand by the stop 14 on the fastener 2 and in the radial direction on the one hand by the inner jacket of the receptacle and on the other hand by the outer jacket of the fastener 2 is limited.

In the axial direction, the star disk pack lies with the hollow side of its flat-conical shape on an inside of the stop facing the star disk pack 14 formed flat contact surface and on the other hand with the curved side of the cone at one of the front end of the pin 1 formed flat contact surface. In the radial direction, the star discs are each with their radially outer edge on the inner surface of the through hole of the receptacle of the adjacent construction and with its radially inner edge on the outer surface of the fastener 2 at.

By axially screwing the fastener 2 in the internal thread 3 at the roller-facing end portion of the axis is the star disk pack in the annulus between pins 1 and stop 14 axially clamped. In this case, compression in the axial direction of the star discs causes an elastic change in their cone angle and thereby a reduction in the inner diameter of the star discs. This leads to the radial widening of the star discs and thus to frictional jamming 2 this and the fastener 2 in the recording. As the fastener 2 on the internal thread 3 is screwed in the through hole of the axle, thus at the same time the axis by the jamming of the fastener 2 attachable in the receptacle.

For mounting is the preassembled arrangement on the pin 1 and at the stop 14 forming annular shoulder of the fastener 2 plugged into the receptacle and by tightening the fastener 2 at the screw connection on the internal thread 3 about the spring means 13 frictionally clamped. For disassembly is by loosening the fastener 2 on the internal thread 3 the clamping connection via the spring means 13 detachable in the recording and the arrangement on the pin 1 and on the fastener 2 pulled out of the recording.

6 shows in a perspective single view of the flat-cone shape of an exemplarily executed annular shell of the spring means 13 on the hollow side of the cone. The radial slit, alternating from the outer and the inner edge, gives the ring shell a particularly high elasticity.

In 7 is the inventive arrangement according to 5 illustrated with an exemplary embodiment of a lubricant supply. At the roll-facing end face of the fastener 2 is based on the bottom of the hexagon socket opening an axial lubricant inlet channel 15 , designed here as a central axial bore provided. This extends to the screwed state of the pin 1 and the receiving enclosed end portion of the fastener 2 , The lubricant inlet channel 15 serves to supply both the roller bearing and the adjacent construction with lubricant. To allow re-lubrication, at the bottom of the hexagon socket opening is a correspondingly formed lubricant inlet of the lubricant inlet channel 15 a lubricant adapter, such as a grease nipple, can be inserted.

To supply lubricant to the adjacent construction is a radial connection channel 16 from the end of the lubricant inlet channel 15 off and runs to an annular groove 17 on the outer jacket of the fastener 2 in the area of the pin 1 , The ring groove 17 communicates with a second radial connection channel 18 that's on tap 1 extends at a small axial distance to the axial end and the inner surface of the axial through-hole in the journal 1 with an annular groove 19 on the outer jacket of the pin 1 in the field of recording connects. The ring groove 19 communicates with a lubricant feed from the inner casing of the intake of a central lubrication of the adjacent construction.

To supply lubricant to the roller bearing extends from the lubricant inlet channel 15 approximately at the level of the axially inner end of the lubricant inlet, a radial connecting channel to a first annular groove on the outer surface of the fastening element 2 in the region of the axially inner end of the internal thread 3 , The annular groove communicates with a radial connection channel on the inner jacket of the axial passage bore at the roller-facing end portion of the axis. The connection channel runs from the inlet on the inner jacket of the axial passage bore to the roller bearing on the outer jacket.

LIST OF REFERENCE NUMBERS

1

 spigot

2

 fastener

3

 inner thread

4

 clamping ring

5

 outer cone

6

 inner cone

7

 slot

8th

 deepening

9

 inner cone

10

 outer cone

11

 slot

12

 annular shoulder

13

 spring means

14

 attack

15

 Lubricant supply channel

16

 connecting channel

17

 ring groove

18

 connecting channel

19

 ring groove

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102005060531 A1 [0002]

Claims (13)

Arrangement for fastening a roller, in particular a cam roller, in a receptacle of a connecting construction, with an axle on which the roller is rotatably mounted and which, for engagement in the receptacle, has a pin ( 1 ), characterized in that at least one fastening element ( 2 ) is provided, which is axially screwed into the axis and at a clamping connection with the pin ( 1 ) cooperates, by screwing in the fastener ( 2 ) Pins ( 1 ) and fastener ( 2 ) are axially clamped to the clamping connection and the clamping connection for clamping in the receptacle is expandable. Arrangement according to claim 1, characterized in that the fastening element ( 2 ) is axially screwed in the roll-facing end portion of the axis. Arrangement according to one of claims 1 or 2, characterized in that the fastening element ( 2 ) at a cone clamping connection with the pin ( 1 ) cooperates, by screwing in the fastener ( 2 ) Pins ( 1 ) and fastener ( 2 ) are axially braced at the cone clamping connection and the pin ( 1 ) is tensioned by widening of the cone clamping connection in the receptacle. Arrangement according to one of claims 1 to 3, characterized in that the pin ( 1 ) an outer cone ( 5 ), the outer diameter of the free end of the pin ( 1 ), and the pin ( 1 ) on the outer cone ( 5 ) with an inner cone ( 6 ) on a coaxially arranged clamping ring ( 4 ) cooperating with the fastening element ( 2 ) is positively connected, wherein by screwing the fastener ( 2 ) the clamping ring ( 4 ) on the inner cone ( 6 ) on the outer cone ( 5 ) on the pin ( 1 ) axially slidable and by radial expansion of the clamping ring ( 4 ) the pin ( 1 ) on the outer cone ( 5 ) is frictionally clamped in the recording. Arrangement according to claim 4, characterized in that for the positive connection with the fastening element ( 2 ) the clamping ring ( 4 ) in on the outer cone ( 5 ) deferred condition at one at the end of the pin ( 1 ) projecting end portion on the inner shell at least partially a radial recess ( 8th ) and the fastening element ( 2 ) at one end of the pin ( 1 ) outstanding end portion has a radial projection in the recess ( 8th ) on the clamping ring ( 4 ) intervenes. Arrangement according to one of claims 1 to 3, characterized in that the pin ( 1 ) an inner cone ( 9 ), whose inner diameter is at the end of the pin ( 1 ) and with an outer cone ( 10 ) at the roller end portion of the fastener ( 2 ) cooperates, by screwing in the fastener ( 2 ) the outer cone ( 10 ) on the fastening element ( 2 ) in the inner cone ( 9 ) axially and the pin ( 1 ) by widening in the region of the inner cone ( 9 ) is frictionally clamped in the recording. Arrangement according to one of claims 1 or 2, characterized in that the fastening element ( 2 ) via coaxially arranged spring means ( 13 ) with the pin ( 1 ) cooperates, by screwing in the fastener ( 2 ) Pins ( 1 ) and fastener ( 2 ) via the spring means ( 13 ) axially clamped and the spring means ( 13 ) are spreadable for clamping in the recording. Arrangement according to claim 7, characterized in that the fastening element ( 2 ) at a free end portion of the pin ( 1 protruding) and the spring means ( 13 ) coaxial between the pin ( 1 ) and a stop ( 14 ) at the free end portion of the fastener ( 2 ) are arranged, wherein by screwing in the fastener ( 2 ) the spring means ( 13 ) between pins ( 1 ) and stop ( 14 ) are axially braced and the fastener ( 2 ) by radial spreading of the spring means ( 13 ) is frictionally clamped in the recording. Arrangement according to one of claims 7 or 8, characterized in that the spring means ( 13 ) have one or more successively arranged for elastic spreading flat conical executed ring shells. Arrangement according to one of claims 7 or 8, characterized in that the spring means ( 13 ) Have at least one elastically expandable plastic ring. Arrangement according to one of claims 1 to 10, characterized in that for receiving the fastener ( 2 ) in the axis an axial through hole in the axis is provided and at the end of the roll-facing end portion has an internal thread ( 3 ) is formed, in which the fastener ( 2 ) is screwed to an external thread at its end. Arrangement according to one of claims 1 to 11, characterized in that the fastening element ( 2 ) is designed as a threaded bolt or threaded pin. Arrangement according to one of claims 1 to 12, characterized in that for the supply of lubricant, the fastening element ( 2 ) starting from its roll-facing end face an axial lubricant inlet channel ( 15 ), which is connected via a lubricant connection with a lubricant inlet of a central lubrication in the area of receiving the adjacent construction.

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