DE102013225689A1 - Freewheel device with mounting component - Google Patents

Abstract

The invention has for its object to propose an easy to install freewheel device. For this purpose, a freewheel device 1 with a sleeve component 2 and with a plurality of clamping bodies 4, wherein the clamping body 4 are arranged in the sleeve member 2, and proposed with a mounting portion 10, wherein the mounting portion 10 and the clamping body 4 are formed as a common mounting member 3 ,

Description

The invention relates to a freewheel device with a sleeve component and with a plurality of clamping bodies, wherein the clamping body are arranged in the sleeve component. The invention further relates to a method for mounting the freewheel device.

Freewheels are used, for example, when a coupling between a shaft and a surrounding construction in a rotational direction of the shaft to be set rotationally fixed and released in the other direction. Another application of the freewheels are the overrunning clutches. Such freewheels can be found, for example, in the automotive sector with starters. Freewheels in the automotive sector are usually designed for the transmission of high torques. But freewheels are also already known for applications with lower loads.

For example, the document discloses DE4442404C2 , which probably forms the closest of the art, a freewheel device with a plastic cage, are arranged in the clamping rollers.

Field of the invention

The invention has for its object to propose an easy to install freewheel device. This object is achieved by a freewheel device with the features of claim 1. Furthermore, this object is achieved by a method having the features of claim 10. Preferred or advantageous embodiments of the invention will become apparent from the dependent claims, the following description and the accompanying drawings.

In the context of the invention, a freewheel device for a shaft or for an axle is proposed. In particular, the shaft or the axis forms a first rotation partner and the freewheel device, optionally coupled with a surrounding construction, a second rotation partner. Functionally, the freewheel device is designed to release a relative movement between the first and the second rotary partner in a circumferential direction and to lock in a reverse direction. It is possible that the first rotating partner rotates so that it is designed as the shaft and the freewheel device is optionally formed stationary with the surrounding structure. Alternatively, it is possible that the first rotating partner is formed stationary and thus forms the axis and the freewheel device, optionally coupled to the surrounding construction, rotates. In further embodiments of the invention, it is also possible that both the first and the second rotating partner rotates.

The freewheel device comprises a sleeve component which, for example, has a cylindrical, in particular a straight, hollow cylindrical shape. Furthermore, the freewheel device comprises a plurality of clamping bodies, wherein the clamping bodies are arranged in the sleeve component. Particularly preferably, the clamping bodies are designed as rollers, in particular as cylindrical rollers. The sleeve component preferably has a plurality of clamping body pockets, which are arranged distributed in the circumferential direction about a central axis of the sleeve component and / or the freewheel device. Alternatively or additionally, the central axis is defined by the possibly common axis of rotation of the freewheel device and / or the shaft or the axis. Particularly preferably, the clamping body pockets are arranged regularly or equidistantly in the direction of rotation. The clamping body pockets are open in the radial direction inwards. Particularly preferably, the clamping body pockets extend in the axial direction to the central axis.

Particularly preferably, each clamping body is assigned at least or exactly one clamping body pocket. The extent of the clamping body pockets in the direction of rotation is chosen so that the respective clamping body can move in the direction of rotation in the clamping body pockets.

In the context of the invention it is proposed that in the freewheel device, a mounting portion is provided, wherein the mounting portion and the clamping body, in particular the plurality of clamping bodies are formed as a common, in particular one-piece mounting member. In particular, the common mounting component is arranged in the sleeve component. Thus, the sleeve component and the mounting component form an in particular at least two-part, in particular, exactly two-part preassembly assembly. The mounting portion and the clamping body are detachably and / or separably connected. In particular, the mounting component makes it possible for the mounting section to be separated from the clamping bodies at a later time, so that the clamping bodies are released. Particularly preferably, the common assembly component comprises all clamping body of the freewheel device.

It is a consideration of the invention that the assembly of the clamping body in the sleeve component in principle represents a complex and error-prone mounting step. Thus, during assembly of the clamping body, individual clamping bodies can fall out of the sleeve component again. In particular, assembly errors are possible if the falling out of individual sprags do not is noticed. In this case, possibly even the life of the freewheel device and thus a machine with the freewheel device would be limited by this possible assembly error. According to the invention, it is now proposed to form a preassembled subassembly by the sleeve component and the mounting component, wherein the clamping bodies are preferably secured in a material-locking manner by the mounting portion in the sleeve component. During assembly, the mounting component is easily inserted into the sleeve member to manufacture the pre-assembly. An incorrect assembly is excluded in this assembly step, since the sleeve component either all clamp body of the mounting member or no clamp body has. Furthermore, the assembly is also simplified, since instead of a plurality of clamping bodies only the common mounting component must be introduced.

In general, the common mounting component may consist of the same or different materials, wherein the materials are selected from a group comprising plastics, fiber-reinforced plastics, metal, sintered material, etc.

In a preferred embodiment of the invention, however, the mounting component is designed as a plastic component. In this embodiment, the mounting component can be produced, for example, in a known simple manner by an injection molding process. The complexity of the mounting component is not a problem because it can be mapped in a likewise simpler known manner in the mold or the tool. Optionally, in addition, it is preferred that the sleeve component is also designed as a plastic component. By training as plastic components, the freewheel device can also be mounted very easily, since no metal-processing steps during installation are necessary.

In a preferred structural embodiment of the invention, the mounting portion has a connection region, wherein the clamping body are detachably connected at their end faces, in particular at the axial end faces, via a predetermined breaking point with the connection region. Thus, each clamping body is assigned a predetermined breaking point. In the further assembly of the freewheel device on the shaft or axis of the mounting portion can be easily separated from the clamping bodies and thereby the clamp body are released separately by the predetermined breaking point is separated or dissolved. This assembly step can be performed collected for all clamp body of the freewheel device in a simple manner.

In a preferred embodiment of the invention, the mounting portion comprises a handling area, wherein the handling area is integrally formed on the connection area and protrudes from the sleeve component. The handling area is formed for example as a pin portion which is arranged coaxially with the central axis. When mounting the freewheel device, the mounting member may be inserted into the sleeve member by first the handling area is inserted into the sleeve member and subsequently performed by the sleeve member. In particular, in the training as a pin portion of the handling area after the implementation of the opposite side of the sleeve member can be manually or mechanically gripped and the mounting member are pulled into the sleeve member. Thus, the handling area supports the mounting of the freewheel device. During further assembly, the handling area can be used to manipulate the connection area so that the predetermined breaking points break and the clamping bodies are released. The connection area is removed from the freewheel device together with the handling area.

In order to achieve the simplest possible production while at the same time easy handling of the assembly component, it is preferred that the handling area is designed as a sprue channel, wherein the plastic for the clamping body is injected through the sprue channel. In the production form of the assembly component, provision can be made for the clamping bodies to extend in a common plane radially to the handling region, in particular to the sprue channel. The connecting region is then formed as a plurality of connecting channels from the sprue to the sprags over the predetermined breaking points. Upon insertion of the mounting component into the sleeve component, the connection region is deformed so that the clamping bodies are transferred from the initially radial orientation to the sprue channel in an axial alignment with the central axis. The transfer takes place in a simple manner by pulling the mounting component in the sleeve component.

In a preferred embodiment of the invention, the sleeve component has an input region for insertion of the mounting component, wherein the sleeve component in the input region has an insertion bevel for supporting, in particular centering, an insertion of the assembly component into the sleeve component. The insertion bevel may be formed as a preferably completely circumferential, funnel-shaped insertion bevel. In alternative embodiments, each of the clamping body and / or each clamping body pocket is associated with a single Einführschrägenabschnitt, wherein the individual Einführschrägenabschnitte a part funnel, in particular a half funnel, to support and / or centering of the respective clamping body selectively for the clamping body pocket.

It is further preferred that the sleeve component has in an exit region a web aligned in the circumferential direction as an axial end stop for the clamping body. The web can be formed completely circumferential. In modified embodiments, the web may also be interrupted several times, but it is ensured that the web in the direction of rotation for each pinch body pocket has a sufficient extent, so that the function of the axial end stop is ensured for the clamping body. The height of the web is preferably dimensioned so that the predetermined breaking point is arranged radially inward to the web, so that the insertion of the mounting member and the separation of the predetermined breaking point can be done without interference from the web. During assembly, the mounting component is retracted so far into the sleeve member until the clamp body in the axial direction abut the web. By further pulling the mounting component, the separation between the mounting portion and the clamping bodies can take place.

It is particularly preferred that the sleeve component spring sections for biasing the clamping body. Preferably, a spring section is arranged in each clamping body pocket. The spring portions are formed so that they can bias the clamping body in a circumferential direction in a tangential direction to the central axis. In particular, the spring sections are formed integrally with the sleeve component, so that they do not have to be mounted separately.

In an advantageous embodiment of the invention, the clamping body are held by the sleeve member form fit. In particular, the clamping body are self-locking and / or captive secured by the sleeve member. This development has the advantage that even after a removal of the mounting portion, the clamping body can not fall out of the sleeve component. For example, the clamping body are pressed by the spring portions in a support portion which secures the clamping body in the circumferential direction and in the radial direction positively.

It is preferably provided that the freewheel device or the shaft or axis has ramp sections which are each designed as a clamping ramp. The ramp sections of the freewheel device have a diameter that tapers in the direction of rotation. The other partner has, however, a smooth cylindrical contact surface for the clamping body. With an offset of the clamping body in the direction of rotation, the clamping body can run up the clamping ramps in diameter-tapering direction, so that a clamping action between the rotating partners arises.

It is particularly preferred that the ramp sections are arranged in the sleeve component, in particular molded. In this embodiment, no additional bodies need to be mounted to provide the ramp sections. In particular, the two-part freewheel device can be mounted as Vormontagebaugruppe directly on a shaft or axis with a cylindrical outer surface as a counter surface.

Another object of the invention relates to a method for mounting the freewheel device, as described above. In the method, the mounting component is mounted in the sleeve component and / or the freewheel device is mounted on a shaft and / or on an axle.

• 1. Einführen des Montagebauteils in das Hülsenbauteil
• 2. Teilmontage der Freilaufeinrichtung auf einer Welle beziehungsweise Achse
• 3. Trennen des Montageabschnitts von den Klemmkörpern
• 4. (Optional) Endmontage der Freilaufeinrichtung auf der Welle beziehungsweise Achse

Optionally, the method comprises the steps:

• 1. insertion of the mounting component in the sleeve component
• 2. Partial assembly of the freewheel device on a shaft or axle
• 3. Separate the mounting section from the sprags
• 4. (Optional) Final assembly of the freewheel device on the shaft or axle

Further features, advantages and effects of the invention will become apparent from the following description of a preferred embodiment of the invention and the accompanying figures. Showing:

1 a three-dimensional schematic representation of a freewheel device during assembly as a first embodiment of the invention;

2 a schematic, partially cut, three-dimensional view of the freewheel device in the 1 ;

3 a schematic, axial plan view of a sleeve component of the freewheel device in the 1 from an entrance area;

4 a partially cut, three-dimensional view of the sleeve member in the 3 ;

5 a schematic, axial plan view of the sleeve component of 3 and 4 from the exit area;

6 a schematic, three-dimensional view of the sleeve component in a radial plan view.

The 1 shows a schematic, three-dimensional representation of a freewheel device 1 during assembly to the preassembly assembly as an embodiment of the invention. The freewheel device 1 comprises a sleeve component 2 as well as a mounting component 3 , which are inserted into each other to form the pre-assembly.

The freewheel device 1 is placed on an axle or shaft (not shown) during further assembly and by removing portions of the mounting component 3 put into a ready state. In the ready state, the freewheel device is used 1 in addition, during a relative rotation between the shaft or axle as a first partner and the free-wheeling device 1 as a second rotation partner in a first direction of rotation to lock the rotation and / or rotatably set the two rotation partners and release the rotation partners in a second direction of rotation and to allow a relative rotation. The freewheel device 1 For example, it can be used in IT or office applications such as facsimile machines, printers, copiers, etc., to prevent reverse rotation of paper transport rollers in one direction of rotation and release them in a different direction of rotation, or even in fans in automobiles Area or with ceiling fans.

The assembly component 3 includes a plurality of clamping bodies 4 which are formed as straight cylinders and / or as rollers. For holding the clamp body 4 has the sleeve component 2 a plurality of clamping body pockets 5 on, which extend in the axial direction to a central axis Z and are distributed in the direction of rotation about the central axis Z regularly and / or equidistantly. The clamping pockets 5 are open radially inwards.

The clamp body pockets 5 are separated from each other by separating sections 6 separated, which are formed in this embodiment as extending in the axial direction webs. In each pinch body pocket 5 is a spring section 7 arranged, which is designed as a compression spring which acts in a tangential direction to the central axis Z. The spring section 7 is as a Y-shaped leaf spring with two spring leaves 8a b formed with their free ends in the clamping body pockets 5 protrude and optionally on the clamping bodies 4 abut to transmit the compressive force and at the other end to the separation section 6 are positively connected and / or integrally connected.

As can be seen in particular from the 3 , which is a schematic, axial plan view of an input region E of the sleeve component 2 shows, can be seen, are in the clamping body pockets 5 each ramp sections 9 arranged, which taper in the direction of rotation, in this example in a clockwise direction, with respect to the central axis Z. The spring sections 7 act with their pressure force in the direction of the diameter-tapering ramp sections 9 , so - figuratively speaking - the clamping body 4 on the ramp sections 9 be pushed up. The axis or shaft, not shown, however, has a straight, cylindrical counter surface, so that by pushing the clamp body 4 along the ramp sections 9 a clamping action between the sleeve component 2 and clamp body 4 on the one hand and shaft or axle on the other. In the opposite direction to this clamping action, the clamping body 4 against the spring sections 7 guided and the diameter opened so far that a rotation between freewheel device 1 and shaft or axis is possible.

As especially good from the 2 , which is a partially cut, three-dimensional representation of the freewheel device 1 in the 1 shows, can be seen, includes the mounting component 3 next to the sprags 4 a mounting section 10 , which is in a handling area 11 and a connection area 12 divides. The connection area 12 is about breaking points 13 with the clamping bodies 4 connected. The assembly component 3 is designed as a one-piece plastic component, in particular plastic injection molded component. The handling area 11 is formed as a pin-shaped or bolt-shaped portion and is also in the manufacture of the mounting component 3 the sprue construction channel for the assembly component 3 , He is with the connection area 12 integrally connected. The connection area 12 is through a plurality of connecting channels 14 formed, which from the runner to the sprags 4 to lead. While in the 2 the clamp body 4 Already aligned almost axially and the connecting channels 14 angled, almost rectangular designed, has the mounting component 3 During production, a different form: During production, the clamp body 4 and also the connection channels 14 from the handling area 11 as sprue in the radial direction perpendicular from. In this way, the mounting component 3 be made in a simple tool by injection molding. Only by pulling in the assembly component 3 in the sleeve component, this is in the in the 2 transferred form transferred.

During assembly of the preassembly assembly thus first the handling area 11 inserted through the entrance area E and led out again through an exit area A. The handling area 11 can be guided manually or by a robot and facilitates the assembly. By pulling the handling area 11 are also the clamping body 4 into the interior of the sleeve component 2 drawn. Around To further simplify this process, has the sleeve component 2 in the entrance area E an insertion bevel 15 on, which is funnel-shaped and a centering for the clamping body 4 forms. In the exit region A, the sleeve component has 2 on the other hand, a circular walkway 16 on, which as an axial end stop for the clamping body 4 is trained. During assembly, the mounting component 3 thus far into the sleeve component 2 retracted until the clamp body 4 with their axial end faces on the web 16 invest. The predetermined breaking points 13 are on the front sides of the clamp body 4 arranged at a radial height so that it does not interfere with the web 16 collide.

Once the mounting component 3 completely in the sleeve component 2 is retracted, the pre-assembly is completed.

In a next assembly step, the freewheel device 1 attached to the shaft or axle and the predetermined breaking points 13 separated as well as the mounting section 10 from the freewheel device 1 away. This is the freewheel device 1 in an operational state.

To fall out of the clamp body 4 in the entrance area to prevent E, this has a circumferential securing bar 17 on top of the clamp body 4 secures positively in the axial direction.

The sleeve component 2 is also designed as a plastic component, in particular plastic injection-molded component, and shaped so that it can be demolded in the simple direction in the axial direction. To achieve this, for example, was the safety bar 16 chosen so small in the radial height that a forced removal in the axial direction by elastic yielding of the securing web 16 is still possible. The spring leaves 8a , b are arranged in the direction of rotation offset from one another, so that they allow an axial demolding.

The advantage of the freewheel device 1 can be seen in the fact that the assembly to the pre-assembly by a simple and straightforward retraction of the mounting component 3 into the sleeve component 2 can be implemented so that a salable and storable unit exists. Also in the final assembly are the clamp body 4 still through the mounting section 10 secured, which is removed only during or after final assembly. This is the freewheel device 1 an easy to install and also inexpensive to produce unit.

The 3 . 4 . 5 and 6 show the sleeve component in various views, wherein the reference numerals correspond to the reference numerals in the preceding figures, so that reference is made to the preceding description.

LIST OF REFERENCE NUMBERS

1

 Freewheel device

2

 sleeve member

3

 mounting component

4

 clamping bodies

5

 Clamp body bag

6

 separating section

7

 spring section

8a

spring leaf

8b

spring leaf

9

 ramp section

10

 mounting portion

11

 handling area

12

 connecting area

13

 Predetermined breaking points

14

 connecting channel

15

 chamfer

16

 web

17

 securing web

A

 output range

e

 entrance area

Z

 central axis

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 4442404 C2 [0003]

Claims (10)

Freewheel device ( 1 ) with a sleeve component ( 2 ) and with a plurality of clamping bodies ( 4 ), wherein the clamping body ( 4 ) in the sleeve component ( 2 ) are arranged, characterized by a mounting section ( 10 ), wherein the mounting section ( 10 ) and the clamping bodies ( 4 ) as a common assembly component ( 3 ) are formed. Freewheel device ( 1 ) according to claim 1, characterized in that the mounting component ( 3 ) are formed as a plastic component. Freewheel device ( 1 ) according to one of the preceding claims 1 or 2, characterized in that the mounting section ( 10 ) a connection area ( 12 ), wherein the clamping body ( 4 ) at their ends over a predetermined breaking point ( 13 ) with the connection area ( 12 ) are separably connected. Freewheel device ( 1 ) according to one of the preceding claims, characterized in that the mounting section ( 10 ) a handling area ( 11 ), wherein the handling area ( 11 ) at the connection area ( 12 ) is formed and from the sleeve component ( 2 ) stands out. Freewheel device ( 1 ) according to claim 4, characterized in that the handling area ( 11 ) is formed as a runner. Freewheel device ( 1 ) according to one of the preceding claims, characterized in that the sleeve component ( 2 ) in an entrance area (E) an insertion bevel ( 15 ) in support of an introduction of the assembly component ( 3 ) having. Freewheel device ( 1 ) according to one of the preceding claims, characterized in that the sleeve component ( 3 ) in a starting area (A) a web ( 16 ) as an axial end stop for the clamping body ( 4 ) having. Freewheel device ( 1 ) according to one of the preceding claims, characterized in that the clamping body ( 4 ) of the sleeve component ( 2 ) are held positively. Freewheel device ( 1 ) according to one of the preceding claims, characterized in that the sleeve component ( 2 ) Spring sections ( 7 ) for biasing the clamping body ( 4 ) and / or that the sleeve component ( 2 ) Ramp sections ( 9 ) having. Method for mounting the freewheel device ( 1 ) according to one of the preceding claims, wherein the mounting component ( 3 ) in the sleeve component ( 2 ) and / or the freewheel device ( 1 ) is mounted on a shaft and / or axle.

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