DE4312759A1 - Wheel, especially belt or chain wheel - Google Patents

Abstract

Wheel, especially a belt or chain wheel (1), which is composed of wheel sectors (2A, 2B) having peripherally on the end face annular grooves (8, 9), in which are arranged annular, axially contractable clamping rings (4, 4A, 4B), by means of which the wheel sectors (2A, 2B) are held braced together and the wheel (1) is to be fastened thus on a shaft (3). The wheel (1) consists of at least three identical or approximately identical wheel sectors (2A, 2B). One of the clamping rings (4) is a closed ring which is fixedly connected to an inner ring (6) via a disc (5) located on the end face. The other clamping ring (4A, 4B) consists of clamping-ring sectors which are individually assigned to each of the wheel sectors (2A, 2B) and which extend in each case over end-face sectors (20A, 20B) as far as hub sectors (21A, 21B). The hub sectors (21A, 21B) have, on the inside, shaft-bearing faces (22A, 22B) and, on the other side, clamping faces (23A, 23B) conical in a manner complementary with an inner face of the inner ring (6), the closed clamping ring (4) being held braced together with the clamping-ring sectors (4A, 4B) by means of axial screw connections (14). <IMAGE>

Description

The invention relates to a wheel, in particular belt or Sprocket that is composed of wheel sectors that have circumferential annular grooves in which annular, axially contractible clamping rings are arranged, by means of which the wheel sectors are held together and that The wheel is to be attached to a shaft in this way.

A wheel of the type mentioned is from the German Utility model specification G 89 03 076.1 U1 known. The known Wheel has the disadvantage that the individual wheel sectors between two clamping rings to be screwed tight on the shaft are held. When assembling or disassembling individual Wheel sectors require that both clamping rings be accessible are. Therefore, when working on the wheel, the entire wheel of be subtracted from the shaft. This is a repair of the Rades complex and costly.

In addition, it is necessary to remove the known wheel loosen chain tension. With subsequent assembly the chain tension is therefore time consuming again adjust.

Another disadvantage of the known wheel is that Use of plastic wheel sectors, which for Sound insulation is required, the torsional strength of the wheel at the Wave, because there is plastic on metal, is low. That's why is for the safe transmission of the torque of the shaft to the Wheel requires a key or wedge, which makes the wheel  more complex to manufacture and more difficult to assemble or to wait is.

In addition, the clamping rings are to be connected by many screws a uniform contact pressure of the wheel on the shaft to reach. When assembling the wheel, all screws are closed to solve. The many screws increase the one for changing the Wheel sectors required assembly time.

The object of the invention is to disclose a wheel which without additional anti-rotation devices on a shaft is to be arranged and their individual wheel sectors by the Accessible to the operator and quick and easy without Adjustment work must be changed without having to remove it completely of the wheel from the shaft and a relaxation of the chain or Require belt drive.

The object is achieved in that the wheel at least three identical or approximately identical wheel sectors exists and one of the clamping rings is a closed ring that via an end disk with an inner ring is connected, and the other clamping ring from clamping ring sectors exists, which are each individually assigned to the wheel sectors and each across frontal sectors up to hub sectors extend the inside shaft contact surfaces and on the other complementary conical to an inner surface of the inner ring Have clamping surfaces, the closed clamping ring with the Tension ring sectors clamped by axial screw connections is held together.

Advantageous refinements are the subject of the dependent claims.

The wheel according to the invention is quick and easy to assemble.

For assembly, the closed clamping ring is loosely attached to the shaft inserted, with the inner ring facing the fitter.

The closed clamping ring advantageously has a central one Shaft mounting hole on, whereby the clamping ring already  is arranged approximately centered on the shaft.

Now the individual wheel sectors are gradually becoming the Tension ring fed by the individual tension ring sectors on the closed clamping ring are screwed and the respective Wheel sector between the clamping ring and one wheel sector assigned clamping ring sector is clamped.

By screwing the tension ring sectors with the closed clamping ring are the conical clamping surfaces of the Hub sectors with the correspondingly conical design Tensioned inner surface of the inner ring, causing the Shaft contact surfaces of the hub sectors on the shaft so that they cannot rotate, enclosing them, are pressed.

Preferably, the clamping surface is complementary The inner surface of the inner ring is conical by 2.5 °.

By screwing the wheel this is on the shaft centered.

Two clamping ring sectors already advantageously enclose with theirs Shaft contact surfaces the shaft by more than 180 °. This is the wheel is centered when the assembly is incomplete. This Design allows an exchange of wheel sectors, e.g. B. for Repairs without removing the wheel or relaxing the Require chain or belt drive.

To do this, the wheel is turned until the wheel sector to be replaced is not loaded with the chain or the belt. The Screwing of the wheel sector that now holds the unloaded The tension ring sector is released, the tension ring sector is withdrawn Wheel sector replaced and by unscrewing the Tension ring sector clamped. The one with the closed clamping ring screwed clamping ring sectors keep the wheel stable in the Original position, therefore there is no need to readjust the Chain or belt drive.

The closed tension ring and the tension ring sectors are  advantageously made of metal, preferably steel. Through the The use of metal, especially steel, is one high stability of the wheel, but also an advantageous one Rotational strength of the wheel on the shaft is achieved because of the shaft Metal on metal with the corresponding high torsional strength lies.

The closed clamping ring and the clamping ring sectors point advantageously screwed together on the inside a profile, in which those designed with a corresponding outer profile Wheel sectors are held against rotation.

The clamping rings advantageously have conical pressure surfaces, which in the corresponding conical grooves of the Grip wheel sectors and advantageously braced the wheel sectors Press on the inner ring and hold it in a rotationally fixed manner.

The cone of the pressure surfaces and the grooves is preferably around educated. This cone is taking into account the Sufficient to ensure that the Secure wheel sectors between the tension rings.

The wheel sectors, especially when using the wheel as Gear, and corresponding to the tension ring sectors, are advantageously separated in the tooth base between two teeth. Due to this design, breaking off is more marginal, cut teeth not possible.

Preferably, the closed clamping ring and / or the Tension ring sectors each assigned to a wheel sector Orientation pin, with the wheel sectors one each have the appropriate orientation hole. Through this design becomes a positioning of the wheel sector to be fastened facilitates and also the torsional strength of the wheel sectors increased between the clamping rings.

The clamping ring sectors advantageously each have two Clamping holes and the closed clamping ring accordingly  arranged clamping ring bores with internal thread.

The clamping ring bores are preferably in the inner ring of the closed clamping ring arranged.

The clamping rings are screwed through the holes screwed together and clamped. The arrangement of the Drilling results in sufficient stability of the wheel when Replacing a wheel sector is only two screws too to solve.

The clamping ring sectors preferably have a center between the Clamping holes have a pull-out hole with an internal thread, which advantageously corresponds to the thread of the clamping ring bores. By the pull hole is a release of the clamped Tension ring sectors easily possible by loosening the screws and a screw into the internal thread of the pull hole is rotated. This screw is supported on Inner ring and thus presses the one to be removed Clamping ring sector out.

The wheel of the invention is inexpensive to manufacture, because in generally only three different components used be, namely the closed clamping ring, at least three same clamping ring sectors and at least three of the same Wheel sectors.

The clamping rings are advantageous in saving costs with wheel sectors different diameters and / or serrations can be used, whereby each with wheels of different design same clamping rings can be used.

The wheel is non-rotatable on one without additional anti-rotation locks Arrange shaft. The individual wheel sectors are from the Operator side accessible and quick and easy to change, without completely removing the wheel from the shaft and one Require relaxation of the chain or belt drive.  

The invention is explained below using an exemplary embodiment in FIGS. 1 to FIG. 3.

Fig. 1 shows a view of the clamping ring sector side of the fully assembled wheel;

Fig. 2 shows a ring sector span side plan view of the assembled wheel, a wheel and a clamping ring sector removed;

FIG. 3 shows a cross section III-III to FIG. 2.

Fig. 1 shows a view of the clamping ring sector side of the fully assembled wheel ( 1 ).

The wheel ( 1 ) is non-rotatably mounted on a shaft ( 3 ).

The wheel ( 1 ) consists of at least three identical or approximately identical wheel sectors ( 2 A, 2 B, 2 C), the tension ring sectors ( 4 A, 4 B, 4 C) and the closed tension ring which is not visible from the perspective shown. The tension ring sectors ( 4 A, 4 B, 4 C), whose end face sectors ( 20 A, 20 B, 20 C) are visible, are each individually assigned to the wheel sectors ( 2 A, 2 B, 2 C) and by screws ( 14 ) connected to the closed clamping ring.

The shaft contact surfaces ( 22 A, 22 B, 22 C) of the clamping ring sectors ( 4 A, 4 B, 4 C) are clamped to the shaft ( 3 ) by the conical design of the invisible clamping surfaces of the hub sectors and the inner surface of the inner ring, as in Fig. 3 illustrates, and enclose them rotatably by 360 °.

The wheel sectors ( 2 A, 2 B) are each separated in the tooth base ( 26 ) between two teeth ( 27 , 28 ).

The distance between the wheel and tension ring sectors ( 2 A- 2 C, 4 A- 4 C) is drawn relatively wide for clarity. With precise manufacturing, this distance can be reduced to almost zero.

Fig. 2 shows a ring sector span side plan view of the mounted wheel (1), wherein a wheel and a clamping ring segment is removed.

In this illustration, the closed clamping ring ( 4 ), which is firmly connected to an inner ring ( 6 ) via an end disk ( 5 ), is visible.

The clamping ring ( 4 ) has a conical pressure surface ( 25 A) which, in correspondence with the not visible groove of the wheel sector, presses it against the inner ring ( 6 ) in a rotationally fixed manner.

The front disc ( 5 ) of the closed clamping ring ( 4 ) has a central shaft mounting hole ( 7 ).

The inner ring ( 6 ) is arranged concentrically to the shaft receiving bore ( 7 ).

The closed clamping ring ( 4 ) is held together with the clamping ring sectors ( 4 A, 4 B) by axial screw connections ( 14 ).

It is clear that the two remaining shaft contact surfaces ( 22 A, 22 B) enclose the shaft ( 3 ) by more than 180 °, so that the wheel ( 1 ) is kept stable and centered on the shaft ( 3 ). A chain run is indicated by dash-dotted lines. The chain ( 30 ) is kept unaffected in its tension despite removal of a wheel and a tension ring sector.

The clamping ring sectors ( 4 A, 4 B) each have two clamping bores, which are covered by the screw heads ( 14 ), and the closed clamping ring ( 4 ) has correspondingly arranged clamping ring bores ( 13 , 13 A) with an internal thread, which in the version shown in the Inner ring ( 6 ) are arranged on.

The clamping rings ( 4 , 4 A, 4 B, 4 C) can be screwed through the holes ( 13 , 13 A) through screws ( 14 ).

The closed clamping ring ( 4 ) has an orientation pin ( 10 ), each assigned to a wheel sector ( 2 A, 2 B), on which the wheel sectors ( 2 A, 2 B) can be plugged with a corresponding orientation hole.

The clamping ring sectors ( 4 A, 4 B) have a pull-off hole ( 15 ) with an internal thread between the clamping bores, which preferably corresponds to the thread of the clamping ring bores ( 13 , 13 A). The pull-out hole ( 15 ) makes it easy to loosen the clamping ring sectors ( 2 A, 2 B) that are braced with the inner ring ( 6 ) by loosening the screws ( 14 ) and turning a screw into the internal thread of the pull-out hole ( 15 ). This screwed-in screw is supported on the inner ring ( 6 ) and, when it is turned further, pushes the tension ring sector to be removed from the bracing.

FIG. 3 shows a cross section III-III to FIG. 2.

The wheel ( 1 ) with the closed clamping ring ( 4 ), the clamping ring sectors ( 4 A, 4 B) and the wheel sectors ( 2 A, 2 B) is arranged on the shaft ( 3 ) in a rotationally fixed manner.

The clamping ring sectors ( 4 A, 4 B) each extend over end-face sectors ( 20 A, 20 B) up to hub sectors ( 21 A, 21 B).

The hub sectors ( 21 A, 21 B) have shaft contact surfaces ( 22 A, 22 B) on the inside and, on the other hand, clamping surfaces ( 23 A, 23 B). The clamping surfaces ( 23 A, 23 B) are complementary conical to the inner surface of the inner ring ( 6 ) arranged on the closed clamping ring ( 4 ).

The closed clamping ring ( 4 ) is held together with the clamping ring sectors ( 4 A, 4 B) by axial screw connections ( 14 ).

The clamping surface ( 23 A, 23 B) and complementarily the inner surface of the inner ring ( 6 ) is preferably conical by 2.5 °.

The closed clamping ring ( 4 ) and the clamping ring sectors ( 4 A, 4 B) screwed together on the inside on a profile in which the wheel sectors ( 2 A, 2 B) designed with a corresponding outer profile are held in a rotationally fixed manner.

The clamping rings ( 4 , 4 A, 4 B) have conical, preferably by 5 °, pressure surfaces ( 25 A, 25 B). The grooves ( 8 , 9 ) of the wheel sectors ( 2 A, 2 B) are complementary conical to the pressure surfaces ( 25 A, 25 B).

With this design, the clamping rings ( 4 , 4 A, 4 B) are clamped non-rotatably around the shaft ( 3 ) on the one hand by screwing them together and, on the other hand, the wheel sectors ( 2 A, 2 B) are rotatably fixed by the clamping rings ( 4 , 4 A, 4 B) held.

An orientation pin ( 10 ) arranged on the clamping ring ( 4 ) and the orientation hole ( 11 ) correspondingly arranged on the wheel sector ( 2 B) are shown cut.

The clamping ring sectors ( 4 B) have a pull-off hole ( 15 ) with an internal thread between the clamping holes.

Claims (12)

1. wheel, in particular belt or sprocket ( 1 ), which is composed of wheel sectors ( 2 A, 2 B) which have circumferential annular grooves ( 8 , 9 ) in the front, in which annular, axially contractible clamping rings ( 4 , 4 A , 4 B, 4 C) are arranged, by means of which the wheel sectors ( 2 A, 2 B) are held together and the wheel ( 1 ) is to be fastened on a shaft ( 3 ), characterized in that the wheel ( 1 ) is made of there is at least three identical or approximately identical wheel sectors ( 2 A, 2 B, 2 C) and one of the clamping rings ( 4 ) is a closed ring which is fixedly connected to an inner ring ( 6 ) via an end plate ( 5 ), and the other clamping ring ( 4 A, 4 B, 4 C) consists of clamping ring sectors, each of which is individually assigned to the wheel sectors ( 2 A, 2 B, 2 C) and each over frontal sectors ( 20 A, 20 B, 20 C) up to Hub sectors ( 21 A, 21 B) extend, the inside shaft bearing surfaces ( 22 A, 22 B, 22 C) and others ts to an inner surface of the inner ring ( 6 ) complementary conical clamping surfaces ( 23 A, 23 B), the closed clamping ring ( 4 ) is held together with the clamping ring sectors ( 4 A, 4 B, 4 C) clamped together by axial screw connections ( 14 ) . 2. Wheel ( 1 ) according to claim 1, characterized in that the clamping surface ( 23 A, 23 B) and complementarily the inner surface of the inner ring ( 6 ) is designed conically by 2.5 °. 3. Wheel according to one of claims 1 or 2, characterized in that the front disc ( 5 ) of the closed clamping ring ( 4 ) has a central shaft receiving bore ( 7 ) and the inner ring ( 6 ) is arranged concentrically with the shaft receiving bore ( 7 ). 4. Wheel ( 1 ) according to one of the preceding claims, characterized in that the clamping rings ( 4 , 4 A, 4 B, 4 C) are made of metal, preferably steel. 5. wheel ( 1 ) according to any one of the preceding claims, characterized in that two respective shaft contact surfaces ( 22 A, 22 B) form a hollow cylinder sector closed by more than 180 °. 6. wheel ( 1 ) one of the preceding claims, characterized in that the closed clamping ring ( 4 ) and the clamping ring sectors ( 4 A, 4 B, 4 C) screwed together on the inside have a profile in which the wheel sectors designed with a corresponding outer profile ( 2 A, 2 B, 2 C) are held against rotation. 7. wheel ( 1 ) according to any one of the preceding claims, characterized in that the clamping rings ( 4 , 4 A, 4 B, 4 C) have conical, preferably by 5 °, pressure surfaces ( 25 A, 25 B) and complementary the grooves ( 8 , 9 ) are conical. 8. wheel ( 1 ) according to any one of the preceding claims, characterized in that the wheel sectors ( 2 A, 2 B, 2 C) are each separated in the tooth base ( 26 ) between two teeth ( 27 , 28 ). 9. wheel ( 1 ) according to any one of the preceding claims, characterized in that the closed clamping ring ( 4 ) and / or the clamping ring sectors ( 4 A, 4 B, 4 C) each have a wheel sector ( 2 A, 2 B, 2 C) ) have assigned orientation pin ( 10 ) and the wheel sectors ( 2 B) each have a corresponding orientation hole ( 11 ). 10. Wheel ( 1 ) according to one of the preceding claims, characterized in that the clamping ring sectors ( 4 A, 4 B, 4 C) each have two clamping bores and the closed clamping ring ( 4 ) correspondingly arranged clamping ring bores ( 13 , 13 A) with an internal thread and the clamping rings ( 4 , 4 A, 4 B, 4 C) through the bores ( 13 , 13 A) screws ( 14 ) can be screwed. 11. Wheel ( 1 ) according to claim 10, characterized in that the clamping ring bores ( 13 , 13 A) are arranged in the inner ring ( 6 ). 12. wheel ( 1 ) according to any one of the preceding claims, characterized in that the clamping ring sectors ( 4 A, 4 B, 4 C) centrally between the clamping bores a withdrawal hole ( 15 ) with an internal thread, which preferably the thread of the clamping ring bores ( 13 , 13th A) corresponds to.