EP2929202A1

EP2929202A1 - Connection of a tubular device to a shaft

Info

Publication number: EP2929202A1
Application number: EP13779220.6A
Authority: EP
Inventors: Juergen Hesse; Tobias Lutz
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2012-12-10
Filing date: 2013-10-18
Publication date: 2015-10-14
Also published as: DE102012222627A1; DE102012222627B4; US20160305484A1; WO2014090453A1; RU2015127648A; US9879729B2; CN104838162B; CN104838162A; RU2656921C2

Abstract

A tubular device (30; 30a) for connecting to a shaft (20) is proposed so that a torque can be transmitted between said tubular device (30; 30a) and said shaft (20). The tubular device (30; 30a) has a hollow accommodating region (38) for accommodating a first bearing region (46) of the shaft (20). The accommodating region (38) has at least a first contact surface (72) for coming into contact at least radially with at least the first contact region (46) of the shaft (20). The tubular device (30; 30a) has at least one torque-transmitting section which is provided for engaging with at least one torque-transmitting section (50.1, 50.2, 50.3, 50.4) of the shaft (20). The at least one torque-transmitting section of the tubular device (30; 30a) is at least one elevation (39.1, 39.2, 39.3, 39.4) which is provided immovably on the tubular device (30; 30a) and which projects from the contact surface (72) into the hollow accommodating region (38).

Description

description

CONNECTION OF A TUBE DEVICE WITH A SHAFT Prior art

The invention relates to a tubular device for connection to a shaft according to the preamble of the independent claim.

From joints with feather keys are tubular devices for

Connection with a shaft known, so that between a tubular device and the shaft torque is transferable, wherein the

tubular device having a hollow receiving portion for receiving a first support portion of the shaft, the receiving portion having at least a first contact surface for radial support on at least a first support portion of the shaft and wherein the tubular device has at least one torque transmitting portion which is provided to engage at least one torque transmitting portion of the shaft. This allows high torques to be transmitted.

For assembly, the key is usually inserted into a groove in the shaft and pushed this assembly in the tubular device. Care must be taken that the shaft is oriented so that the feather key does not fall out.

Disclosure of the Invention Advantages of the Invention The tubular device for connection to a shaft with the features of the independent claim has the advantage that the assembly is simplified.

This is achieved by a tubular device for connection to a shaft, so that between the tubular device and the shaft

Torque is transferable, wherein the tubular device has a hollow receiving portion for receiving a first bearing portion of the shaft, wherein the receiving portion has at least a first contact surface for radial support on at least a first bearing portion of the shaft, wherein the tubular device at least one

torque transmitting portion adapted to engage at least one torque transmitting portion of the shaft, and wherein the at least one torque transmitting portion of the tubular device is at least one protruding from the contact surface into the hollow receiving portion, immovable to the tubular one Device arranged survey is.

The measures listed in the dependent claims are advantageous developments and improvements in the independent

Claim specified tubular device possible.

In an advantageous development, the at least one elevation is designed as a web extending along the inner circumference and in the longitudinal direction of the tubular device, and preferably integrally with the web

Device formed. This makes a simple structure possible.

In a preferred embodiment, the at least one, in particular designed as a web, survey runs over at least part of the total length of the tubular device.

In a further preferred embodiment, the at least one, in particular designed as a web, elevation comprises a main portion which is a distance from an end face of the tubular device and a length , wherein the length is preferably only over a part of the total length of the tubular device.

In a further preferred embodiment that the at least one, in particular designed as a web, survey at the transition from a first

End face to the hollow receiving portion of the tubular device begins, the transition is preferably provided with a countersink.

If in the surface of at least one, in particular designed as a web, elevation, which faces the central axis, a in

Groove running longitudinally of the device is formed, which extends over a portion of the length of at least one, in particular designed as a web, survey and whose depth is preferably less than the height of at least one, in particular designed as a web, survey, it can be after the assembly of the tubular device on a shaft a

Arrange securing device for securing the tubular device on the shaft.

It can realize a defined stop for the securing device by the groove terminates in a wall, the wall in particular in a

Level extending perpendicular to the longitudinal direction of the tubular device.

A locking device of the securing device can be particularly easily arranged in the tubular device by a ramp is formed in the main portion, which is inclined so that it moves away from the central axis of the tubular device with increasing distance from the end face and preferably via a shoulder in the contact surface passes. A secure hold of the tubular device on the shaft can be realized if the at least first contact surface over its length to the area with the at least one, in particular designed as a web, survey has a constant diameter and in particular to the first contact surface directly or indirectly connects a second contact surface, which preferably has a constant diameter. A higher torque can be implemented if at least two, in particular three, preferably, in particular formed as webs, four elevations are arranged on the inner circumference, which preferably divide the contact surface into equal partial areas. In addition, this allows coding of devices with a different number of surveys in different performance categories.

Is on the inner circumference of the tubular device at least one

Locking device provided against mounting the tubular device with the wrong orientation, which is preferably formed at one end of the tubular device, which is opposite to an opening provided as a mounting opening of the tubular device, the correct orientation for assembly is easy to see.

A compact design of a shaft, to which a fairly high torque can be transmitted, results when the contact surface of the hollow receiving area has a diameter of 11.8 mm, and the at least one, in particular designed as a web, each elevation a width of 4 , 95 mm, with preferably diametrically opposed webs have a distance of 8.65 mm.

Particularly suitable for this is a main section, which has a length of 14.95 mm.

In a preferred embodiment, the tubular device is a

Plastic injection molded part, wherein preferably at least the first

Contact surface no Ausformschräge is formed.

A variety of uses arise from the fact that the tubular device comprises a tool, which is preferably designed as a roller, saw or grinding wheel, or that the tubular device comprises an adapter for another tool or that the tubular device is an adapter for another tool and the other tool includes. Embodiments of the invention

Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description. Show it:

Fig. 1 shows a machine tool with a first embodiment of a

Wave,

Fig. 2 is a partial view of the machine tool of Fig. 1 with a on the

Shaft mounted sanding roller,

Fig. 3 is a side view from the left or a view of the

Front side of the grinding roller and the shaft of FIG. 2,

4 is a perspective view of the shaft without grinding roller,

5 is an end view of the grinding roller without shaft,

6 is a side view of the shaft alone,

7 is a longitudinal section through the shaft,

Fig. 8 is a perspective longitudinal section through a sleeve according to the

Section line VIII in Fig. 9,

9 shows a first end side of the sleeve,

10 the second end face of the sleeve,

11 shows a longitudinal section through the sleeve according to the section line XI in FIG. 9, FIG. 12 shows a longitudinal section through the sleeve according to the section line XII in FIG. 9, FIG. 13 shows a perspective longitudinal section through a shortened sleeve, FIG 15 shows a perspective view of an actuating cap, FIG.

16 is a side view of the actuator cap,

17 is a front view of the actuator cap,

Fig. 18 is a longitudinal section through the grinding roller and shaft during the

Assembly,

19 is a longitudinal section through the grinding roller and shaft in one

assembled state and

Fig. 20 is a longitudinal section through the grinding roller and shaft in a first

Condition during disassembly.

description FIG. 1 shows a main device embodied as a hand-held machine tool 10, as known, for example, from WO 2012/052242 A2. However, the machine tool 10 can also be used as a stationary or semi-stationary, that is to say for driving on construction sites, suitable machine tool

be educated. The machine tool 10 is designed as a power supply, however, a battery-powered version is conceivable. The

Machine tool 10 can be used for example as a roll grinder or saw with a rotating and / or oscillating output. The machine tool 10 has a housing 12 in which an unillustrated drive motor is arranged. The housing 12 has a

elongated shape and can be held with one hand or two hands. At one end of the housing, an elongate hollow neck 14 is disposed. The longitudinal axis of the neck 14 is slightly inclined to the longitudinal axis of the housing 12. The longitudinal axis of the neck 14 may also be arranged steeper, parallel or in alignment with the longitudinal axis of the housing 12. In the neck 14, a transmission shaft 16 (indicated in FIGS. 4 and 5) or a differently configured transmission element, for example a belt, is arranged. At the end of the neck 14 remote from the housing 12 is a

Output head 18 is formed. The output head 18 can also be directly on the housing

12 may be arranged. In that case, no neck 14 would be present. It is also possible that no output head 18 is present.

In the output head 18, a shaft 20 designed as an output shaft is arranged by means of a receptacle 19. The shaft 20 may be mounted in the receptacle 19 so that no destructive disassembly is possible. However, it is preferred that the shaft 20 is arranged for maintenance or repair purposes removable in the receptacle 19. The central longitudinal axis or longitudinal axis 22 of the shaft 20 extends perpendicular to

Longitudinal axis of the housing 12 and forms with it a plane. However, the longitudinal axis 22 of the shaft 20 may also extend at a different angle to the longitudinal axis of the housing 12 and / or form no plane with this. The shaft 20 can be driven in rotation and / or in an oscillating manner. It is also an axial movement possible, such as in the manner of a jigsaw conceivable. The axial movement can also with the rotary and / or oscillating movement be superimposed. It is also conceivable that the shaft 20 does not have the

Transmission shaft 16 is driven, but the transmission shaft 16 drives. In this case, the machine tool 10 or a differently configured main device, such as a dynamo, are driven.

FIGS. 2 and 3 show a roller 24 mounted on the machine tool 10 or the shaft 20. The roller 24 is mounted on the shaft 20 by means of a tubular device designed as a sleeve 30. The shaft 20 thus serves for rotational coupling of the machine tool 10 with the sleeve 30, so that between the machine tool 10 and the sleeve 30, a torque is transferable.

In the present embodiment, the roller 24 is made of rubber. On the roller 24, an abrasive paper or polishing belt, not shown, can be fastened. At the periphery of the roller 24 longitudinally extending slots 26 are formed.

However, instead of the shown roller 24, another tool may be provided, for example a flap grinder, a brush in the form of a wire, nylon or so-called fladder brush. Also, instead of the roller 24, a saw blade, a saw blade segment, another, serving for example for grinding, disc, or a disc segment may be provided.

The roller 24 is arranged on the tubular device designed as a sleeve 30. The roller 24 may be a single component or an assembly. The sleeve 30 may also be a single component or assembly. The roller 24 and the sleeve 30 are in the present embodiment, however, taken in one piece. It should be noted that the sleeve 30 may also be an integral part of the roller 24 or the roller 24 is an integral part of the sleeve 30. If the roller 24 and the sleeve 30 are separate components or assemblies, the roller 24 may be on the sleeve 30 be removable or not removable mounted. In a demountable

Attachment, the roller 24 may be mounted on the sleeve 30 by a press fit, screw, snap or bayonet connection. In a non-disassembly attachment, the roller 24 may be glued, ultrasonically welded and / or pressed onto the sleeve 30. The latter fasteners can also be designed so that the roller 24 and sleeve 30 yet are again solvable from each other without having to be destroyed. Also, the roller 24 and the sleeve 30 may be potted or overmoulded together. For example, the roller 24 may be made of plastic and the sleeve 30 of metal or vice versa, wherein the plastic is applied to the metal by means of a plastic injection molding process. Also, both components may be plastic or metal or other suitable material. In the present embodiment, the sleeve 30 is designed as a plastic injection molded part.

FIG. 4 shows a first, free end 31 of the shaft 20 in an end view, and FIG. 5 shows the roller 24 with sleeve 30 in an end view. Clearly recognizable are mutually corresponding cross-sectional areas of the shaft 20 and the sleeve 30. This makes it possible to ensure that only for mounting on the shaft 20 provided sleeves 30 are mounted on the shaft 20.

It is also apparent from FIG. 4 that a cap 32 is arranged on the end face of the first end 31 of the shaft 20. In addition, a blocking device designed as a ball 34 is provided, wherein the cap 32 and ball 34 are part of a securing device 36. The securing device 36 serves at least the axial securing of the sleeve 30 on the shaft 20 after assembly. For assembly, the shaft 31 is first inserted into the sleeve 30 with the first end 31; therefore, the first end 31 is the free end of the shaft 20. In this case, the shaft 20 with the cap 32 and the ball 34 can be inserted together in a hollow receiving portion 38 of the sleeve 30 shown in Figure 5, which facilitates assembly. Advantageously, are in the hollow

Receiving portion 38 four inwardly directed webs 39 are formed, which extend in the longitudinal direction of the receiving area 38 and the sleeve 30. In addition to FIG. 4, FIGS. 6 and 7 show further details of the shaft 20.

The shaft 20 preferably has a length of 89.6 mm. It should be noted that this measure and the following dimensions may include usual manufacturing tolerances up to a few tenths of a millimeter. The shaft 20 includes a pin 40, a stepped intermediate portion 42 and a mounting portion 44. The pin 40 is at the second end remote from the first end 31 37 provided. The pin 40 preferably has a length of 15 mm and a diameter of 7 mm. The pin 40 is preferably mounted via a press fit in the receptacle 19. With the pin 40, the shaft 20 at the

Machine tool 10 and output head 18 attached. The pin 40 of the shaft 20 is followed by a stepped intermediate region 42 having a length of preferably 11 mm, which forms a transition from the diameter of the pin 40 to the larger diameter of the mounting region 44 on the other hand. The sleeve 30 is placed on this mounting area 44.

The mounting area 44 preferably has a length of 63.5 mm. On the mounting area 44 and along the outer circumference of the shaft 20, starting from the first end 31, a first support area 46 is provided, which can be arranged in the hollow receiving area 38 of the sleeve 30 during assembly of the sleeve 30 on the shaft 20. The first bearing area 46 has a length of 48.4 mm and a diameter of preferably 11.7 mm. Between the first support region 46 and the intermediate region 42, a second support region 48 is preferably formed. The second bearing area 48 has a diameter slightly larger than the first bearing area 46, preferably 12.1 mm. The diameters of the support areas 46 and 48 are preferably made particularly accurate.

Starting from the first end 31 of the shaft 20 extend at its outer periphery parallel to the longitudinal axis 22 and in the longitudinal direction of the shaft 20 by four 90 ° offset grooves 50.1, 50.2, 50.3, 50.4. These grooves 50.1, 50.2, 50.3, 50.4 represent torque transmitting portions of the shaft 20. In the present embodiment, four grooves 50.1, 50.2, 50.3, 50.4 are provided, which is advantageous for assembly. However, it is also conceivable that two, three or more than four grooves 50.1, 50.2, 50.3, 50.4 are formed on the outer circumference of the shaft 20. For example, for different

Power classes of machine tools 10 may be provided a different number of grooves 50.1, 50.2, 50.3, 50.4, with more grooves 50.1, 50.2, 50.3, 50.4 are provided for higher power classes. At the higher

Power classes, for example, a higher torque can be transmitted. In the present embodiment, the grooves 50.1, 50.2, 50.3, 50.4 have a rectangular cross-sectional area. The grooves 50.1, 50.2, 50.3, 50.4 have a width of preferably 5.2 mm and a length of 23.8 mm. The distance of a groove bottom 52 of a first groove 50.1 or 50.2 to the groove bottom 52 of a second, diametrically opposite groove 50.3 or 50.4 is preferably 8.5 mm. In other words, the key width of two diametrically opposite groove bottoms 52 is preferably 8.5 mm. The distance of a groove bottom 52 of a groove 50.1, 50.2, 50.3, 50.4 from the longitudinal axis 22 of the shaft 20, in this case with the longitudinal axis 22, the central axis of the shaft 20 is meant, is thus about 4.25 mm. Since the width of the grooves 50.1, 50.2, 50.3, 50.4 is 5.2 mm and the diameter of the first bearing area 46 is 11.7 mm, the ratio of the width to the diameter is about 44%. It has proved to be advantageous if the ratio of the width of the grooves 50.1, 50.2, 50.3, 50.4 to the diameter of the first support region 46 is 30 to 60%, preferably 40 to 50%. This results in a compact construction and a low surface pressure. In particular, on a sleeve 30 made of plastic can thus still transfer a good torque without the surface pressure is too large.

At their groove end 53 opposite the first end 31 of the shaft 20, the side surfaces 54 of the grooves 50.1, 50.2, 50.3, 50.4 preferably form a semicircle whose radius corresponds to half the width of the grooves 50.1, 50.2, 50.3, 50.4. This is the preferred embodiment in terms of manufacturing and assembly. However, the grooves 50.1, 50.2, 50.3, 50.4 can also be designed so that the groove bottom 52 terminates in a circular arc to the outer circumference of the shaft 20. Also, instead of the first-mentioned semicircular groove end 53, a side perpendicular to the side surfaces 54 and groove bottom 52 could be provided. It is also possible that the side surfaces 54 of the grooves 50.1, 50.2, 50.3, 50.4 are not parallel to one another as shown but are inclined relative to one another. The grooves 50.1, 50.2, 50.3, 50.4 can thus also each have a different cross-sectional areas - for example, a trapezoidal, in particular in the form of one

Swallowtail, or triangular or rounded. Starting from the end face of the first end 31, an axial recess formed as a longitudinal bore 56 is provided in the shaft 20. The

Longitudinal bore 56 preferably has a diameter of 6.05 mm. However, it can also have a stepped or conical shape. The longitudinal bore 56 is a blind hole with a conical end. However, it can also be designed as a flat bottom blind hole. The longitudinal bore 56 may also be a through hole with a constant, conical or stepped

Diameter be formed. In addition to the round cross-sectional area, another, for example an angular or oval, cross-sectional area can also be provided.

With a distance of 6.8 mm from the end face of the end 31 of the shaft 20 is perpendicular to the longitudinal bore 56 and the longitudinal axis 22 designed as a transverse bore 58 lateral recess provided which extends from the groove 50.1 to the groove 50.3. The transverse bore 58 has a first opening 60 and a second opening 62 on the outer circumference of the shaft 20. The second opening 62 is preferably larger than the first opening 60. The second opening 62 preferably has a diameter of 4.1 mm and the first opening 60 a Groove 52 has a diameter of 3.65 mm. The opening 60 is in

Groove 52 of the groove 50.1 and the second opening 62 in the groove bottom 52 of the diametrically opposite groove 50.2 formed. But it is also possible that the transverse bore 58 is formed with its openings 60, 62 at a different location of the shaft 20. The second opening 60 is smaller because a drill having a conical tip in the manufacture from the second opening 62 does not entirely pass through the groove bottom 52 of the groove 50.1. This creates a portion of the first opening 60, which is the side surface of a

Truncated cone envelops. This protrudes part of the ball 34, the purpose

preferably has a diameter of 4 mm, or another

trained locking device from the first opening 60, the ball 34 is secured against falling out. But this can also be achieved by the fact that only the first opening 60 is provided. It is also conceivable that the opening 60 is drilled with a diameter which allows insertion of the ball 34. After insertion, the first opening 60 is then caulked. Instead of a transverse bore 58 and a first opening 60 and a plurality of transverse bores 58 and first openings 60 may be provided, the for example, are arranged axially one behind the other. Preferably, however, only a transverse bore 58 or first opening 60 is provided.

FIGS. 8 to 12 show further details of the sleeve 30. Reference is also made to a sleeve 30a shortened in relation to the sleeve 30, which is shown in FIG. Compared with the sleeve 30 according to FIGS. 8 to 12, the same parts, regions or sections of the shortened sleeve 30a are provided with the same reference numerals.

As already stated, the sleeve 30 is a tubular device for connection to the shaft 20, so that between the

Machine tool 10 - or trained differently

Main device - and the sleeve 30 by means of the shaft 20 a torque is transferable. Of the sleeve 30, the torque is transmitted to the roller 24 in the present embodiment. Unlike one

Disc-shaped device, a tubular device is characterized in that the length of the tubular device is greater than the diameter. In particular, the length of a tubular device or the sleeve 30 is greater than its inner diameter, which will be discussed in detail. This allows the shaft 20 and in her the

Securing device 36 are designed to save space radially. In addition, a roller 24 can be securely mounted on the tubular device or sleeve 30, since there is a larger contact surface. But even with an integrally formed sleeve 30 and roller 24 results in significantly lower loads on the material by, for example, surface pressure and / or shear stresses.

The sleeve 30 has a length of 60 mm. The outer circumference is substantially cylindrical and has an outer diameter of 16.05 mm. The sleeve 30 has at least one hollow receiving region 38 for the first and second support region 46, 48 of the shaft 20. Alternatively, two parallel receiving areas 38 could be provided, are inserted into the two parallel shafts 20. However, the simple training is preferred. The hollow receiving area 38 preferably extends over the entire length of the sleeve 30 and is advantageously open at both end faces or ends 64 and 66 of the sleeve 30. At the first end face 64 is a mounting opening 68 of the hollow receiving portion 38 and the sleeve 30. At the second end face 66 is an operating opening 70 of the hollow receiving portion 38 and the sleeve 30. For mounting the sleeve 30 or a roller 24 or other Device on the shaft 20, the sleeve 30 is inserted with the mounting hole 68 ahead of the shaft 20, which will be discussed in more detail.

In the region of the operating opening 70 or near the second end face 66, two elevations in the form of wall sections 71 are indicated on the inner circumference of the sleeve 30 with dashed lines, which are in the hollow

Receiving area 38 range. However, these can also be omitted. It is also possible that only one wall section 71 or more than two are provided. It is also possible that three, four or up to a different number of webs 39.1, 39.2, 39.3, 39.4 corresponding number of wall sections 71 are provided. The wall portions 71 serve as locking portions against mounting of the sleeve 30 with incorrect orientation, that is with the

Operation opening 70 ahead of the shaft 20th

The wall sections 71 have a smaller distance to the longitudinal central axis or longitudinal axis 73 of the sleeve 30 than the radius of the first support region 46 of the shaft 20. The wall sections 71 are formed between two adjacent webs 39.1 and 39.4 and 39.2 and 39.3. They preferably have an extension in the longitudinal direction of the sleeve 30 of 1 - 2 mm. The wall sections 71 are adjacent to the second end face 66 or at the local beginning of the webs 39.1, 39.2, 39.3, 39.4. As locking devices against mounting of the sleeve 30 with incorrect orientation instead of the formed between the webs 39.1 and 39.4 and 39.2 and 39.3 wall sections 71 also differently shaped elevations can be provided. For example, the side surfaces 54 of the grooves 50.1, 50.2, 50.3, 50.4 can taper in the direction of the groove ends 53 and the webs 39.1, 39.2, 39.3, 39.4 have a geometire adapted thereto, in that Direction of the mounting hole 68 also narrower. The course can be steady or with heels.

The receiving region 38 of the sleeve 30 has at least one first contact surface 72 for radial support on the first support region 46 of the shaft 20. The contact surface 72 may extend directly from the second end face 66 of the sleeve 30. In the present embodiment is between the first

End face 66 and the contact surface 72, however, still an intermediate portion 74 is formed, which has a slightly larger inner diameter. The intermediate region 74 starts from the second end face 66 and has a length 76 of 20 mm less the resulting length 78 of a countersink 80 formed in the end face 66. The countersink 80 encloses an angle of 90 °. The contact surface 72 has an inner diameter of 11.8 mm and extends over a length 82 of 10 mm. If the sleeve 30 is formed as an injection-molded part, then preferably no draft angle is present on the contact surface 72.

Starting from the end face 66 or the end of the countersink 80, four protrusions distributed uniformly on the inner circumference in the sleeve 30 run as walls or webs 39.1, 39.2, 39.3, 39.4. The webs 39.1, 39.2, 39.3, 39.4 are thus arranged offset by 90 ° to each other. The webs 39.1, 39.2, 39.3, 39.4 subdivide the contact surface 72 into preferably equal partial surfaces 86.1, 86.2, 86.3, 86.4. Since the webs 39.1, 39.2, 39.3, 39.4 do not extend as far as the contact surface 72 in the longitudinal direction, the partial surfaces 86.1, 86.2, 86.3, 86.4 are still at their inner ends of the sleeve 30 at their ends pointing in the direction of the first end face 64 Strips connected together. Instead of the preferred uniform distribution of the webs 39.1, 39.2, 39.3, 39.4 on the inner circumference of the sleeve 30, other distributions are possible. Instead of the four webs 39.1, 39.2, 39.3, 39.4, a different number may be provided. Therefore, at least two, in particular three, preferably four webs 39.1, 39.2, 39.3, 39.4 can be arranged on the inner circumference. Also a bridge 39.1, 39.2, 39.3, 39.4 alone is possible. More than four webs 39.1, 39.2, 39.3, 39.4, for example five, six, seven, eight or more may also be provided; four are preferred. At least it is therefore provided that the sleeve 30 at least one

torque transmitting portion, preferably in the form of a wall or a web 39.1, 39.2, 39.3, 39.4, which is engageable with at least one torque transmitting portion, preferably in the form of a groove 50.1, 50.2, 50.3, 50.4 of the shaft 20 in engagement , The webs 39.1, 39.2, 39.3, 39.4 are outgoing from the contact surface 72

Elevations of the sleeve 30, which protrude into the hollow receiving area 38. Instead of elevations of the sleeve 30 in the form of the webs 39.1, 39.2, 39.3, 39.4 also differently shaped walls or wall sections than

Be provided torque transmitting sections. It is also sufficient if at least one such survey of the sleeve 30 is provided. Preferably, the at least one elevation is formed integrally with the sleeve 30. It is therefore an integral part of the sleeve 30. Preferably, the sleeve 30 with the at least one survey or the at least one web 39.1, 39.2, 39.3, 39.4, preferably four surveys

or four webs 39.1, 39.2, 39.3, 39.4, are provided, produced in an injection molding process. It is also possible that one or more webs 39.1, 39.2, 39.3, 39.4 made of a different material than the rest of the sleeve 30 is made. For example, as the material for the web or bars 39.1,

39.2, 39.3, 39.4 be provided as an insert in a metal

Inserted plastic injection mold and molded with the material of the sleeve 30. It is also possible that the web or the webs 39.1, 39.2, 39.3, 39.4 is or are pressed into recesses in the wall sleeve 30. Furthermore, it is also conceivable that the web or webs 39.1, 39.2,

39.3, 39.4 is glued or glued into the sleeve 30 or recesses of the sleeve 30. Also, an attachment of the web or the webs 39.1, 39.2, 39.3, 39.4 in the sleeve 30 or in recesses of the sleeve 30 by means of ultrasonic welding is possible. It is of course possible that the web or the webs 39.1, 39.2, 39.3, 39.4 can be released from the sleeve 30, without destroying the sleeve or the web or the webs 39.1, 39.2, 39.3, 39.4. The various configurations have as a result that the web or the webs 39.1, 39.2, 39.3, 39.4 or a differently formed survey immovably held in the sleeve 30 or are.

As a result, a simple mounting of the sleeve 30 on the shaft 20 is possible. In addition, the web or the webs 39.1, 39.2, 39.3, 39.4 or otherwise trained survey is captive.

The webs 39.1, 39.2, 39.3, 39.4 have parallel side walls 87 with a width of 5.05 mm. Between the side walls 87 are in the webs 39.1, 39.2,

39.3, 39.4 surfaces 88 formed. The distance between the surfaces 88 of two diametrically opposite webs 39.1, 39.2, 39.3, 39.4 is preferably 8.65 mm. The distance of a web 39.1, 39.2, 39.3, 39.4 or the surface 88 of a web 39.1, 39.2, 39.3, 39.4 to the central axis of the sleeve 30 is 4.325 mm. The contact surface 72 has, as already mentioned, an inner diameter of 11.8 mm. Thus, there is a ratio of the distance of a web 39.1,

39.2, 39.3, 39.4 from the longitudinal axis 73 of the sleeve 30 to the diameter of the contact surface of about 37%. This results in a compact radial

Construction of the sleeve 30. Advantageous values for the ratio of the distance of a web 39.1, 39.2, 39.3, 39.4 from the longitudinal axis 73 of the sleeve 30 to the

Diameter of the contact surface 72 are also between 25 to 50%,

in particular 30 to 45%, preferably 35 to 40%. The width of the webs 39.1, 39.2, 39.3, 39.4 of 5.05 mm results in a ratio of 11.8 mm in diameter of the first contact surface 72 of about 43%. This ratio in combination with the ratio of distance of the web 39.1, 39.2,

39.3, 39.4 to the inner diameter of the mounting surface 72 results in a favorable cross-sectional area of the web 39.1, 39.2, 39.3, 39.4, wherein in the cross-sectional area of the webs 39.1, 39.2, 39.3, 39.4 even more

Recesses can be formed, which will be discussed later. Furthermore, good values for the cross-sectional area of the web or webs 39.1, 39.2, 39.3, 39.4 are obtained if the ratio of the width of the web or webs 39.1, 39.2, 39.3, 39.4 to the diameter of the first contact surface 72 is between 30 and 60%, in particular 40 and 50, preferably 40 and 45%. The webs 39.1, 39.2, 39.3, 39.4 are 29.35 mm long. They thus extend over at least part of the total length of the sleeve 30. The webs 39.1, 39.2, 39.3, 39.4 begin at the transition from the first end face 64 to the hollow receiving portion 38 of the sleeve 30, which, as shown in the present embodiment, preferably with the Countersink 80 is provided. Instead of the shown parallel side walls 87, these may also be inclined to each other, so that the webs 39.1, 39.2, 39.3, 39.4 also have a trapezoidal or triangular cross-sectional area on their outsides. Also, the webs 39.1, 39.2, 39.3, 39.4 may be rounded. Due to the length of the webs 39.1, 39.2, 39.3, 39.4 of 29.35 mm they are about 2.5 times as long as the diameter of the first

Mounting surface 72. This results in a particularly favorable for the size of the side walls 87 surface pressure. Further advantageous values result if the length of the webs 39.1, 39.2, 39.3, 39.4 is 2 to 3 times as long as the diameter of the first mounting surface 72.

In the surface 88 of the webs 39.1, 39.2, 39.3, 39.4, which faces the central axis of the sleeve 30, in each case one in the longitudinal direction of the sleeve 30, preferably parallel to the longitudinal axis 73, extending groove 90 is formed. The groove 90 has a length 92 of 14.4 mm. The groove 90, which extends over part of the length of the web 39 and whose depth is preferably less than the height of the web 39.1, 39.2, 39.3, 39.4, preferably has a rounded cross-sectional area. The radius of the rounding is 1 to 5 mm,

preferably 1 to 3 mm. Particularly preferably, the radius is 2 mm and thus half the diameter of the ball 34. The size of the groove 90 is chosen so that still a flat residual surface of the surface 88 remains, whose width is preferably 0.5 to 1 mm.

The groove 90 terminates in a wall 94, which preferably extends in a plane which is perpendicular to the longitudinal axis 73 of the sleeve 30. Thus, the wall 94 preferably forms a stop for the ball 34 or other securing device 36 disposed on the shaft 20. Instead of having the plane shown

Wall 94, the groove 90 may be formed at its end as the groove end 53.

The length 93 of the respective web 39.1, 39.2, 39.3, 39.4 or the webs 39.1, 39.2, 39.3, 39.4 is from the wall 94 to its end facing away from the end face 66 14.95 mm. More generally, the length 93 of the web 39.1, 39.2, 39.3, 39.4 from the end of the groove 90 to its end facing away from the end face 66 is 14.95 mm, which can easily be produced even with non-planar walls 94. This results in the already mentioned Total length of the bridge 39.1, 39.2, 39.3, 39.4 from 29.3 to 29.4 mm. However, the accuracy of the length 93 is preferably greater than the total length.

To the groove 90 and the wall 94 is followed by a ramp 96, the

preferably in the web 39.1, 39.2, 39.3, 39.4 extends, and is inclined so that it moves away from the central axis of the sleeve 30. The width of the ramp 96 is 2 to 5 mm, preferably 3 to 4 mm. As a result, two remaining surfaces of the surface 88 of the respective web 39.1, 39.2, 39.3, 39.4 remain laterally from the ramp 96 as viewed in the longitudinal direction. Between the end of the ramp 96, which is also the end of the web 39.1, 39.2 remote from the first end face 64,

39.3, 39.4, and the contact surface 72 is a shoulder 98 is formed. The paragraph 98 results from the expiring side walls 87, which are rounded at the end with a radius which corresponds to half the width of the webs 39.1, 39.2, 39.3, 39.4, ie 2.5 mm. Instead of the inclined ramp 96 shown may also be provided a stepped ramp. Also it is possible that no

Ramp 96 is present. The web 39.1, 39.2, 39.3, 39.4 can in this case have a uniformly flat surface 88.

The length 92 of the groove 90 and the length 93 divide the respective web 39.1, 39.2, 39.3, 39.4 in the longitudinal direction of the sleeve 30 into a secondary section 100 and a main section 102. The secondary section 100 extends over the length 92 or runs along the groove 90 The main portion 102 extends over the length 93. The main portion 102 thus also has a length 93 of 14.95 mm. The main section 102 shown in FIG

Embodiment directly to the side portion 100 connects, from the second end face 66 of the sleeve 30 has a distance of 14.4 mm. It is also possible for the secondary section 100 of the webs 39.1, 39.2, 39.3, 39.4 to be omitted. Thus, of the webs or a web 39.1, 39.2, 39.3, 39.4 only the respective main section 102 would be present. With a length of 14.95 mm, this results in a relation to the 11.8 mm diameter of the mounting surface

72 out of about 1.27. This ratio is still favorable for the resulting surface pressure on the side walls 87. Further advantageous values result if the ratio of the length of the main section 102 to the diameter of the first contact surface 72 is between 1 and 1.5, preferably between 1.2 and 1, 3, lies. As already mentioned, the previous description of the sleeve 30 according to FIGS. 8 to 12 also applies to the shortened sleeve 30a of FIG. With regard to the sleeve 30a, therefore, in order to avoid unnecessary repetition, reference is expressly made to this description. In the figure 13 not occurring but previously mentioned reference numerals with respect to the figures 8 to 12 arise directly and clearly also with regard to the figure 13. The sleeve 30a has over the sleeve 30 has a length of 30 mm. At the transition of the first end face 64 to the contact surface 72, the sleeve has a countersink 99. The volume of the sleeve 30a is preferably 3.18 cm ^{3 in} total, with a

Deviation may amount to 10%, in particular to 5%.

In contrast to the sleeve 30a, which ends after the first contact surface 72, in the sleeve 30 of Figures 8 to 12 in the interior of the contact surface 72 includes a transition region 104 and to this second contact surface 106 at. If the sleeve 30 is produced by the plastic injection molding method, the second contact surface 106 preferably also has no shaping bevel. Between the second contact surface 106 and the first end face 64, a countersink 108 is preferably formed, which extends in the longitudinal direction of the sleeve 30 over 1 mm. The second contact surface 106 has measured from the first end face 64 of a length 110 of 10 mm less the length, which, if present, results for the reduction 108. On this length 110 is the

Diameter of the second contact surface 106 is constant and is 12.2 mm. The transition region 104 therefore has a resulting length of about 20 mm. The diameter of the transition region 104 is between those of the first and second contact surfaces 72 and 106, that is, between 11.8 and 12.2 mm, for example, 12 mm. In the present exemplary embodiment, the second contact surface 106 adjoins the first contact surface 72 with the interposition of the transition region 104. The second contact surface 106 can also connect directly to the first contact surface 72. In both cases, therefore, the second contact surface 106 connects to the first contact surface 72.

It should be noted that the volume of the sleeve 30 is preferably 5.78 cm ^{3 in} total, with a deviation of up to 10%, in particular up to 5%. FIG. 14 shows a pin-shaped bearing device, hereinafter referred to as pin 120, which is arranged in the longitudinal bore 56. The pin 120 supports the ball 34, whereby the pin 120 is a locking device for the

Securing device 36 forms what will be discussed later. The pencil

120 has a length of 18 mm and a diameter of 5.9 mm and is preferably made of steel or plastic. Instead of the circular

Cross-sectional area can also be provided another, for example, oval or angular, cross-sectional area. The pin 120 may taper longitudinally away from a first end 122. The taper can be continuous and / or conical but also with heels. The course of the

Cross-sectional area of the pin 120 must be adapted to the profile of the cross-sectional area of the longitudinal bore 56 of the shaft 20, so that the pin 120 has a sliding fit after assembly in the longitudinal bore 56 and can be moved over a certain path.

At a distance of 1.4 mm to the first end face 122 of the pin 120 extends an annular groove 124 which has a width of 1.2 mm and a depth from the outer circumference of the pin 120 of 0.7 mm. This results in a diameter of the annular groove 124 of 4.5 mm. Between the first end face 122 and the annular groove 124 thus results in a federal government 125th

At a distance of 5.6 mm from the first end face 122, a radially open pocket 126 is formed. The pocket 126 has a side surface 128 extending transversely to the longitudinal axis of the pin 120. The side surface 128 thus has a face

Distance of 5.6 mm from the first end face 122. The side surface has preferably measured a height of 4 mm from the outer periphery of the pin 120. The end of the side surface 128 remote from the outer circumference of the pin 120 is preferably rounded and in particular has a radius of 1 mm.

On the side surface 128 includes in the pocket 122, a bottom surface 130 at. The bottom surface 130 preferably runs parallel to the longitudinal axis of the pin 120 and has a distance of 4 mm from the outer periphery of the pin 120 due to the height of the side surface 128. The bottom surface 130 also terminates in a radius of preferably 1 mm, so that the bottom surface 130 substantially a U-shape has. at the radius closes at a height of 1.3 mm above the

Floor surface 130 a ramp 132, which is preferably inclined at an angle of 130 ° to the longitudinal axis of the pin 120. The ramp 132 faces away from the first end face 122. As the height above the floor surface 130 increases, the ramp 132 faces away from the floor surface 130. Seen in the longitudinal direction, the ramp ends after 3.25 mm and passes over a radial shoulder 134 in the outer periphery of the pin 132 on. At the opposite end of the first end face 122 of the pin 120, a second end face 136 is formed. Both end faces 122 and 136 are preferably flat.

In FIGS. 15 to 17, the cap 32 is shown in detail. The cap 32 preferably has a diameter of 8.2 mm and a length of 3.3 mm. The cap 32 has a flat, substantially circular end wall 142. The end wall 142 may have a central through-hole (not shown). The end wall 142 is followed by a first portion 144, which is a C-shaped

Has cross-sectional shape, wherein the outer radius of the end wall 142 corresponds. The inner radius of the first section 144 is at least 2.95 mm. The first portion 144 is followed by a second C-shaped portion 146 having an inner radius of 4.5 mm. The inner length of the first portion 144 between the end wall 142 and the second portion 146 is 1.4 mm. At least the inner radius is sized so that the C-shaped portion 146 can be clipped onto the annular groove 124. Through the two C-shaped sections 144 and 146 results in a radial mouth 147, via which the cap 32 can be laterally locked over the collar 123 of the pin. Two slots 148 extending in the axial direction of the cap 32 share the C-shaped ones

Sections 144 and 146, whereby the cap 32 can be easily attached to the pin 120 during assembly. A cap 32 may also be glued to the pin 120 or it may be overmolded with the cap 32. Other

Mounting options are conceivable.

Preferably, the cap 32 has a red color or other color which a person operating the machine tool 10 indicates that the safety device 36 is operable via the cap 32. Also, the cap 32 can be omitted. In this case, the front side 122 and / or the collar 123 may be provided with a red or other signal color. Alternatively, the first C-shaped portion 144 may also be formed as a hollow cylinder without a lateral mouth 147. The second section 146 with the smaller inner radius would be omitted. The slots 148 could be present or omitted. In this case, the cap 32 is pressed axially onto the region of the collar 123, in which case the annular groove 124 can be dispensed with.

The assembly of the shaft 20, the cap 32, the ball 34, the pin 120 and a spring 150 will now be explained with reference to FIG. It is possible the

Shaft 20 before or after this assembly in the receptacle 19 of the

Drive head 18 to assemble. Preferably, however, the shaft 20 will be mounted on the machine tool 10 prior to assembly, since the pressing is easier.

For assembly, the ball 34 is placed in the pocket 126, in particular on the bottom surface 128 of the pin 120. As a result, the securing device 36 is at least partially pre-assembled. The spring 150 is inserted into the longitudinal bore 56 of the shaft 20. However, the spring 150 can also be fastened beforehand to the pin 120 and inserted into the longitudinal bore 56 with it. The

Safety device 36 is pushed against the spring force of the spring 150 in the longitudinal bore 56 and shaft 20 so that the ball 34 comes into the region of the first opening 60. The assembly must then be aligned so that the ball 34 projects through the opening 60 and abuts the ramp 132. Thereafter, the pin 120 can be released. The feather

150 presses against the pin 120, which moves slightly out of the bore 56 out. The ramp 132 then presses against the ball 34, which in turn presses against the opening 60. As a result, the securing device 36 is held in the shaft 20. The force of the spring 150 thus acts so that the securing device 36 presses in the direction of the first 31 end of the shaft 20 and that the

Securing device 36 with the ball 34 and the

Locking device is held in the shaft 20. The force of the spring 150 in the installed state is 5 - 20 N, preferably 10 N. In addition to a spring 150 and the use of a magnet is conceivable that can apply a force on the pin 120, the spring 150 is preferred. The assembly consisting of shaft 20, ball 34, pin 120, spring 150 can be mounted without cap 32. If a cap 32 is mounted, which is preferred, it is now plugged onto the pin 120. As a result, the pin 120 can not be pressed so far into the bore 56 that the ball 34 can rest completely on the bottom surface 130. This is a better backup of the securing device 36 against disassembly. However, it is also possible, the cap 32 after mounting the assembly consisting of shaft 20, ball 34, pin 120, spring 150 put on the pin 120.

It is now also clear that the ball 34 is radially movable by the ramp 132 to the outer periphery of the shaft 20 and by the second end 37 to the first end 31 of the shaft 20 increasing distance of the ramp 132, resulting in a displacement of the pin in the shaft 20 from the first end 31 to the second end 37, the locking device can move away from the outer circumference.

Now, the securing device 36 is fixed in the longitudinal bore 56 extending from the end face of the first end 31 of the shaft 20 or an otherwise formed axial recess already described above.

Preferably, the longitudinal bore 56 extends over the length of the pin 120 in the installed state and additionally the displacement of the pin 120 in the longitudinal bore 56 into it. As already described, the two cross-sectional areas can also taper.

In the assembled state is now also clear that the

Safety device 36 preferably comprises only one of the groove bottom 52 projecting ball 34 or other locking device, although on the shaft 20 a plurality of grooves 50.1, 50.2, 50.3, 50.4 are arranged. It is also possible that the pin 120 is longer and has a plurality of pockets 126 for balls 24 in a row. If the shaft 20 has a larger diameter, the pockets 126 and balls 34 can be distributed at the same height around the circumference. When mounting the roller 24 on the shaft 20, the sleeve 30 is guided with the mounting hole 68 via the first end 31 of the shaft 20. Instead of the sleeve 30, of course, the sleeve 30a can be plugged onto the shaft 20. Hereinafter, only the sleeve 30 will be mentioned for purposes of description. However, the mounting of the sleeve 30a is analog. The webs 39.1, 39.2, 39.3, 39.4 are aligned with the grooves 50.1, 50.2, 50.3, 50.4 so that in each case one web 39.1, 39.2, 39.3, 39.4 is aligned with a groove 50.1, 50.2, 50.3, 50.4. Due to the four existing webs 39.1, 39.2, 39.3, 39.4 and grooves 50.1, 50.2, 50.3, 50.4 this is easier than with a smaller number. Then, the sleeve 30 is pushed further onto the shaft 20. If paragraph 98 of Ramp 96 reaches the

Ball 34, he presses them against the ramp 132 of the pin 120. Since the ball 34 is guided in the bore 60, it is pressed radially inwardly into the longitudinal bore 56 into. Here, the pin 120 on the force acting on the ramp 132 force in the axial direction against the spring force of the spring 150 in the

Longitudinal bore 56 pushed in. When the roller 24 or sleeve 30 is pushed further onto the shaft 20, the ball 34 is pushed over the ramp 96 of the sleeve 30 so far into the bore 60 until the highest point of the ramp 96 is reached. This is the case in the area of the wall 94. If the roller 24 or sleeve 30 continues to the shaft 20th

pushed, so the ball 34 protrudes from the groove bottom 52. The ball 34 projects behind the wall 94 into the groove 90, which is shown in FIG. A markable as a holding portion 152 of the ball 34 section comes to the wall 94 to the plant. The holding section 152 has a radial projection to the groove bottom 53 or an outer surface of the shaft 20 adjacent to the ball 34. It thus becomes clear that the ball 34 or locking device has a radially projecting holding section 152 for the sleeve 30 or device mounted on the shaft 20, which can be guided through the hollow receiving area 38 during assembly of the sleeve 30.

In addition to the ball 34, which comes to rest on the wall 94, also the paragraphs 98 of the webs 39.1, 39.2, 39.3, 39.4 come to rest against the groove ends 53 of the grooves 50.1, 50.2, 50.3, 50.4. The sleeve 20 is stretched on the shaft 20 in the axial direction between the ball 34 or its holding portion 152 and a groove end 53 at least one groove 50.1, 50.2, 50.3, 50.4. The Sleeve 30 is now also locked on the shaft 20, wherein the locking was done automatically or automatically. The self-employed

Locking is achieved in that the ball 34 through the ramp 132 of the pin 120, which is acted upon by the spring 150, with a transverse to

Longitudinal bore 56 acting force is pressed radially outward. The ball 34 is thus held in the locked state by means of an elastic force. If you want to pull the sleeve 30 of the shaft 20, the wall 94 presses against the holding portion 152 and the ball 34. The ball 34 is thereby pressed with a portion 154 removed from the holding portion 152 against the edge of the bore 56. However, the ball 34 can not dodge inward, whereby the lock is made.

In the assembled state, the first contact surface 72 of the sleeve 30 rests on the first support region 46 of the shaft 20 and the second contact surface 106 of the shaft on the second support region 48 of the shaft 20. In the case of the sleeve 30a, only the contact surface 72 rests on the first support region 46 of the shaft 20. The grooves 50.1, 50.2, 50.3, 50.4 of the shaft 20 receive the webs 39.1, 39.2, 39.3, 39.4 of the sleeve 30. If the shaft 20 is driven, press the

Side surfaces 54 of the four grooves 50.1, 50.2, 50.3, 50.4 against the side walls 87 of the four webs 39.1, 39.2, 39.3, 39.4. This can be a relatively high

Torque are transmitted. The grooves 50.1, 50.2, 50.3, 50.4 form as torque transmitting portions of the shaft 20, which can be arranged in the hollow receiving portion 38 of the sleeve 30.

An advantageous aspect is therefore that on the securing device 36, a locking device, for example in the form of the ball 34 is arranged, which locks the sleeve 30 or 30a in a locked state against disassembly of the shaft 20 and in an unlocked state disassembly the sleeve 30 or 30a of the shaft 20 releases. It is also advantageous that at the

Securing device 36 a preferably designed as a pin 120th

Locking device is arranged, with which the ball 34 is unlocked or with the ball 34 is unlocked and lockable, wherein the pin 120 is disposed at the first end of the shaft 20. From the described assembly also shows that the pin 120th

or the locking device is manually unlocked and automatically locked but also in the locked state, the installation of a sleeve 30 or 30a or a tubular device allowed.

From Figure 20, the dismantling shows. Here is the

Secured device 36 by axially pressing the cap 32 against the shaft 20 from the locked to the unlocked state. The pin 120 is pressed against the spring force of the spring 150 in the longitudinal bore 56 into it. In this case, the ramp 132 of the pin 120 is moved. As a result, the ball 34 has space radially inwards. If then the roller 24 or the sleeve 30 or 30a is pulled by the shaft 20, the ball 34 of the wall 94 and the ramp 96 can escape. The roller 24 can then be completely removed from the shaft 20. An advantageous aspect during disassembly is that the securing device 36 remains on the shaft 20 at least when disassembling a roller 24 or sleeve 30 or 30a mounted on the shaft 20. However, due to the axial displacement of the pin 120 resulting from the cap 32, the ball 34 can not penetrate into the longitudinal bore 56 until such time as inadvertent removal of the pin 120 or securing device 36 is possible.

By the illustrated embodiment, it is clear that the

Secured device 36 assumes a locked position in the locked state and in the unlocked state, an unlocked position and that the locking position and the unlocked position on the shaft 20 are radially spaced. This is achieved by holding the ball 34 in its locked position and being able to escape inwardly when unlocked.

Alternatively, it is also possible that the pin 120 has an external thread and the longitudinal bore 56 has a matching internal thread. If the pin is screwed into the shaft 20, the ball 34 can escape inwards. As a result, the ball 34 is unlocked manually. A sleeve 30 or 30a can then be mounted. The pin 120 can then be unscrewed out of the shaft 20 until the ball 34 is pressed radially outward via the ramp 132, until the ball 34 braces the sleeve 30 or 30a. As a result, the sleeve 30 or 30a is locked manually. Preferably, the pin 120 is thereby rotated less than 360 °, which shortens the time for locking and unlocking.

Preferably, the pin 120 is rotated by approximately 180 °. This shortens the time for locking and unlocking, whereby the operation of locking or unlocking is intuitively adequately conveyed to an operator.

It is also conceivable that a modified pin is rotatably mounted in the longitudinal bore 56 and is pressed by a torsion spring in one direction. A bag then has a bottom which has a varying distance to the central axis. As a result, a rotating movement of the pin can cause a locking and unlocking.

By the described embodiments, it follows that a

Secured device by axially pressing an actuating element against the shaft or twisting of the actuating element about a longitudinal axis of the shaft from the locked to the unlocked state can be transferred.

It also follows that a safety device assumes a locked position in the locked state and in the unlocked state

Unlocking position and that the locking position and the

Unlocking position on the shaft can be radially and / or tangentially and / or axially objected.

Claims

claims

A tubular device (30; 30a) for connection to a shaft (20) such that torque is transferable between the tubular device (30; 30a) and the shaft (20), the tubular device (30; hollow receiving area (38) for receiving a first

Supporting region (46) of the shaft (20), wherein the hollow

Receiving portion (38) at least a first contact surface (72) for at least radial bearing on at least a first bearing portion (46) of the shaft (20), wherein the tubular device (30; 30a) has at least one torque transmitting portion provided therefor is to engage at least one torque transmitting portion (50.1, 50.2, 50.3, 50.4) of the shaft (20), characterized in that the at least one torque transmitting portion of the tubular device (30; 30a) is at least one is of the contact surface (72) in the hollow receiving portion (38) projecting, immovably on the tubular device (30; 30a) arranged survey (39.1, 39.2, 39.3, 39.4).

2. Tubular device (30; 30a) according to claim 1, characterized

in that the at least one protrusion (39.1, 39.2, 39.3, 39.4) is designed as a web extending along the inner circumference and in the longitudinal direction of the tubular device (30; 30a) and in particular formed integrally with the tubular device (30; 30a) ,

3. Tubular device (30; 30a) according to claim 1 or 2, characterized

in that the at least one elevation (39.1, 39.2, 39.3, 39.4), which is designed in particular as a web, runs over at least part of the total length of the tubular device (30; 30a). Tubular device (30; 30a) according to one of the preceding

Claims, characterized in that the at least one,

in particular formed as a web, survey (39.1, 39.2, 39.3, 39.4) comprises a main portion (102) having a distance (92) to an end face (66) of the tubular device (30; 30a) and a length (93) wherein the length (93) extends in particular only over part of the total length of the tubular device (30; 30a).

Tubular device (30; 30a) according to one of the preceding

Claims, characterized in that the at least one,

in particular formed as a web, survey (39.1, 39.2, 39.3, 39.4) at the transition from a first end face (66) to the hollow receiving portion (38) of the tubular device (30; 30a) begins, the transition in particular with a countersink (80) is provided.

Tubular device (30; 30a) according to one of the preceding

Claims, characterized in that in the surface (88) of the at least one, in particular designed as a web, elevation (39.1, 39.2, 39.3, 39.4), which the central axis (73) of the tubular device (30; 30a) faces, a in the longitudinal direction of the tubular device (30; 30a) extending groove (90) is formed over a part (92) of the length of the at least one, in particular designed as a web, survey (39.1, 39.2, 39.3, 39.4) runs and their depth in particular less than the height of the at least one, in particular designed as a web, survey (39.1, 39.2, 39.3, 39.4).

Tubular device (30; 30a) according to claim 6, characterized

characterized in that the groove (90) terminates in a wall (94), the wall (94) in particular extending in a plane perpendicular to the longitudinal direction of the tubular device (30; 30a), and more particularly a stop for one on the Shaft (20) arranged securing device (36).

Tubular device (30; 30a) according to one of claims 4 to 7, characterized in that a ramp (96) is provided in the main section (102). is formed, which is inclined so that it with increasing distance to the end face (66) from the central axis (73) of the device (30; 30a) and in particular via a shoulder (98) merges into the contact surface (72).

9. Tubular device (30; 30a) according to one of the preceding

Claims, characterized in that the at least first

Contact surface (72) over its length (82) except for the area with the at least one, in particular designed as a web, survey (39.1, 39.2, 39.3, 39.4) has a constant diameter and that in particular to the at least first contact surface (72) directly or indirectly in

Longitudinal direction of the tubular device (30; 30a) a second

Contact surface (106) connects, in particular a constant

Diameter has.

10. Tubular device (30; 30a) according to one of the preceding

Claims, characterized in that on the inner circumference at least two, in particular three, preferably four, in particular formed as webs, elevations (39.1, 39.2, 39.3, 39.4) are arranged, which subdivide the at least first contact surface (72) in particular in equal partial areas.

11. Tubular device (30; 30a) according to one of the preceding

At least one locking device (71) against assembly of the wrongly oriented tubular device (30; 30; 30a) which is opposite an end (64) of the device (30; 30a) provided as a mounting opening (68).

12. Tubular device (30; 30a) according to one of the preceding

Claims, characterized in that the at least first

Contact surface (72) of the hollow receiving portion (38) has a diameter of 11.8 mm, and that the at least one, in particular designed as a web, survey (39.1, 39.2, 39.3, 39.4) each have a width of 4.95 mm, in particular diametrically opposed webs have a distance of 8.65 mm.

13. Tubular device (30; 30a) according to one of claims 4 to 12, characterized in that the main portion (102) has a length (93) of 14.95 mm.

14. Tubular device (30; 30a) according to one of the preceding

Claims that the tubular device (30; 30a) a

Plastic injection molded part is and that in particular on the at least first contact surface (72) no Ausformschräge is formed.

15. Tubular device (30; 30a) according to one of the preceding

Claims, characterized in that the tubular device (30; 30a) a tool (24), in particular as a roller, saw or

Grinding wheel is formed, comprises, or that the tubular

Device (30; 30a) comprises an adapter for a further tool or that the tubular device (30; 30a) comprises an adapter for a further tool (24) and the further tool (24).