GEAR ARRANGEMENT, HAVING A GEAR COMPOSED OF SEGMENTS

Description

[0001] The invention relates to a gear arrangement comprising a gear composed of segments.

[0002] From the US 1 184 174 A The closest prior art is a gear arrangement in which a gear wheel has teeth on its radial outer side.

[0003] From the US 2014 / 0 023 978 A1 A drum drive is known.

[0004] From the US 2 999 396 A A chain drive is known.

[0005] From the DE 82 13 674 U1 A device for driving a drum is known.

[0006] From the DE 370 560 A A divided gear is known.

[0007] From the WO 2017 / 069626 A1 A method for producing a segment of a gear is known.

[0008] From the US 907 459 A A segmented spring wheel is known.

[0009] The invention is therefore based on the object of developing a gear arrangement, wherein the gear is to be connected in a rotationally fixed, in particular stable, manner to a rotatably mounted part.

[0010] According to the invention, the object is achieved in the gear arrangement according to the features specified in claim 1.

[0011] The advantage here is that the gearwheel, which is composed of individual, separate segments, is stably and non-rotatably connected to the rotatably mounted hollow shaft section. The radially interposed holding units ensure elastic holding, so that vibrations can be dampened and a tension-free arrangement of the segments can be maintained. Furthermore, a circumferentially constant radial distance between the segments and the hollow shaft area can be achieved. The hollow shaft area is formed, for example, in a drum, such as a cement drum or the like. The part is preferably a hollow part. The elastic mounting of the segments according to the invention also enables compensation for manufacturing tolerances or other deviations from concentricity.

[0012] In an advantageous embodiment, each segment is connected to its nearest segment in the circumferential direction, in particular by means of screws. Advantageously, the segments form a ring structure, which is positioned relative to the hollow shaft area by the holding units.

[0013] In an advantageous embodiment, each segment has a first wall region at its end region located at the front in the circumferential direction, in particular which extends further in the axial direction and in the radial direction than in the circumferential direction, wherein each segment has a second wall region at its rear end region in the circumferential direction, in particular which extends further in the axial direction and in the radial direction than in the circumferential direction, wherein the first wall region abuts a second wall region of a next adjacent segment and is connected by means of the screws. It is advantageous in this case that the opposing contact surfaces of the wall regions are each arranged at exactly one respective single position in the circumferential direction, i.e., they extend in the axial direction and in the radial direction, but not in the circumferential direction. This enables mutual alignment of the segments in a simple manner.

[0014] According to the inventionEach segment has an axially continuous recess, in particular an axially continuous borehole. The advantage here is that the holding unit is supported centrally on the segment and the segment can be pushed radially outward by means of the bolt, thus ensuring maximum distance between the segment and the hollow shaft area.

[0015] In an advantageous embodiment, each segment has a hollow section, particularly in the circumferential direction, centrally located, which has an axially continuous recess. This is advantageous in that a bolt can be passed through the recess, thus allowing the segment to be pushed radially outward to maximize radial clearance.

[0016] According to the invention A bolt is inserted into the recess, protruding axially on both sides. The advantage here is that the bolt can be accommodated in the recess without any play.

[0017] According to the inventionThe holding unit has a first spring part that is supported on the hollow shaft region, in particular on the radially outer circumference of the hollow shaft region, and is connected to a first eyelet region, in particular integrally connected and / or designed as a single piece, in particular as a single piece, wherein the bolt extends through the first eyelet region. It is advantageous that force can be transmitted from the spring parts to the bolt by means of the eyelet regions.

[0018] According to the invention the holding unit has a second spring part which is supported on the hollow shaft region, in particular on the radially outer circumference of the hollow shaft region, and is connected to a second eyelet region, in particular materially connected and / or designed in one piece, in particular in one piece, wherein the bolt projects through the second eyelet region, wherein the second spring part is supported on a region of the hollow shaft part which is spaced apart in the circumferential direction from that region of the hollow shaft part on which the first spring part is supported, and / wherein the second spring part is supported on a region of the hollow shaft part which is arranged on the side of the bolt facing away in the circumferential direction from that region of the hollow shaft part on which the first spring part is supported.

[0019] The advantage here is that the bolt is essentially only subjected to a radial force component and no significant tangential or axial force component acts on the bolt.

[0020] In an advantageous embodiment, the spring part is an angled sheet and / or a stamped and bent part, in particular with the bent edge axially aligned. This allows for cost-effective production and achieves high rigidity in both the axial and circumferential directions.

[0021] In an advantageous embodiment, the bolt is pushed through a further first eyelet part and a further second eyelet part, wherein the first spring part is connected to the further first eyelet part and the second spring part is connected to the further second eyelet part, The first eyelet part is axially spaced from the further first eyelet part, and the second eyelet part is axially spaced from the further second eyelet part. This provides the advantage of providing stable support for the bolt, thus preventing the bolt from tipping over.

[0022] In an advantageous embodiment, each segment has teeth of a gearing on its radially outer side, wherein the gearing is either straight-toothed, in particular such that the teeth extend in the axial direction, or helical-toothed, in particular such that the gearing at least partially projects beyond the wall region in the circumferential direction. This is advantageous in that a large gearwheel can be assembled from a plurality of small segments. This requires small manufacturing machines, in particular gear cutting machines.

[0023] In an advantageous embodiment, the first and second spring parts are each made of sheet steel. This is advantageous because cost-effective production is achievable.

[0024] In an advantageous embodiment, the first and second spring parts each have a first region which rests tangentially on the hollow shaft part and each have a second region which has a non-vanishing angle to the first region of the same spring part,

[0025] In particular, the angle has an angular value between 5° and 50°. It is advantageous that a radial force component can be applied.

[0026] In an advantageous embodiment, each segment is assigned a respective holding unit in a unique, in particular bijective, manner. This means that each respective segment is assigned exactly one holding unit. The assignment is therefore unambiguous. An advantage here is that each segment is radially spaced, thus preventing any "sagging" from occurring.

[0027] Further advantages emerge from the subclaims. The invention is defined by the appended claims.

[0028] The invention will now be explained in more detail using schematic illustrations: In the Figure 1 A gear composed of segments 1 is shown in side view. In the Figure 2 One half of the gear is shown in an oblique view. In the Figure 3 a holding unit for one of the segments 1 is shown in side view.

[0029] As in the Figures 1 to 3 As shown, the gear wheel has segments 1 arranged one behind the other in the circumferential direction, in particular ten segments 1.

[0030] At its circumferentially front end region, the segment 1 has a first wall portion 20. The first wall portion 20 extends further in the radial direction than in the axial direction and than in the circumferential direction.

[0031] Likewise, the segment 1 has a second wall section 20 at its circumferentially rear end region. The second wall section 20 extends further in the radial direction than in the axial direction and than in the circumferential direction.

[0032] Each first wall section 20 of a segment 1 abuts a second wall section 20 of a segment 1 immediately adjacent to the segment 1, wherein this first wall section 20 is pressed and connected to this second wall section 20 by means of screws 21. For this purpose, the screws are inserted through recesses extending through the wall sections 20. The screws 21 are arranged tangentially.

[0033] Each segment 1 is held by means of a holding unit, in particular a clamping unit, which is arranged on a hollow shaft area 7, in particular a drum.

[0034] The holding units ensure a uniform spacing of the segments 1 from the hollow shaft area 7. In the axial area covered by the segments 1, the hollow shaft area 7 has a circular-cylindrical outer circumference.

[0035] Each segment 1 has teeth of a toothing on its radially outer side. The toothing is straight-toothed, in particular so that the teeth extend in the axial direction.

[0036] In the circumferential direction, the toothing composed of the teeth carried by the segments 1 is thus continuous.

[0037] In particular, in the center, on its radial inner side, a hollow section 22 is formed on the segment 1, which has an axially continuous recess through which a bolt 2 projects.

[0038] A first eyelet part 3 and a second eyelet part 6 are attached to the bolt. The second eyelet part 6 is connected, in particular welded, to a second spring part 5. The second spring part 5 is supported on the hollow shaft part 7 and thus presses the bolt 2 and thus the associated segment 1 radially outward via the second eyelet part 6.

[0039] The first eyelet part 3 is connected, in particular welded, to a first spring part 4. The first spring part 4 is supported on the hollow shaft part 7 and thus presses the bolt 2 and thus the associated segment 1 radially outward via the first eyelet part 3.

[0040] The first spring part 4 is spaced circumferentially from the second spring part 5. To create tension equalization, the first eyelet part 3 and the second eyelet part 6 each have elongated holes through which the bolts 2 are inserted. The largest clear width of each elongated hole is provided in a respective direction that has a non-zero angle to the radial direction. This ensures elastic compression of the segments 1 and the tangential component of the elastic force exerted by the spring parts 4 and 5.

[0041] The bolt 2 is received and guided in the recess passing through the hollow section 22 essentially without play.

[0042] The bolt 2 protrudes axially from the hollow section 22 on both sides. The first and second eyelet parts (3, 6) are fastened to a first of the two axially projecting regions of the bolt 2. A further first and second eyelet part (3, 6) through which the bolt 2 protrudes are arranged on the other of the two axially projecting regions of the bolt 2. The further first and the further second eyelet parts each have an elongated hole, the largest clear dimension of which again forms an angle or a non-zero angle to the radial direction.

[0043] The first spring part 4 is designed as a sheet metal angle, in particular an angle plate, the first leg of which is supported on the hollow shaft region 7 and the second leg of which is connected to the first eyelet part 3, which is spaced apart from the second eyelet part 6 in the direction of rotation.

[0044] The angle plates extend essentially in the circumferential and axial directions. The bending edge of the angle plates extends in the axial direction. This ensures high rigidity in the axial direction.

[0045] The spring parts (4, 5), which are preferably manufactured as stamped and bent parts, thus provide a high level of stability.

[0046] According to the invention, each segment is pressed radially outwards centrally, in particular centrally in the circumferential direction, by the elastically deformed, in particular prestressed, holding unit assigned to the respective segment 1.

[0047] Thus, the ring formed from the segments 1 is radially uniform, in particular constant, in the circumferential direction, spaced from the hollow shaft region 7.

[0048] In further embodiments of the invention, helical gearing is provided instead of straight gearing, so that the teeth extend along a helical line. Thus, the wall section 20 supports only a portion of a tooth, the remaining portion of which is supported by the wall section 20 of a next-door adjacent tooth. List of reference symbols

[0049] 1 Segment 2 Bolt 3 First eyelet part 4 First spring part 5 Second spring part 6 Second eyelet part 20 Wall section 21 Screws 22 Hollow section 23 Clamping screw 7 Hollow shaft area, especially drum

Claims

1. A gear wheel arrangement, having a gear wheel composed of segments, wherein each segment (1) is supported by means of a respective holding unit on a hollow-shaft region (7) of a rotatably mounted part, in particular drum, characterised in that each segment (1) has an axially continuous cutout, with a bolt (2) being inserted into the cutout, with the bolt (2) protruding axially on either side, with the holding unit having a first spring part (4) which is supported on the hollow-shaft region (7) and is embodied connected to a first eye region, with the bolt (2) protruding through the first eye region, with the holding unit having a second spring part (5) which is supported on the hollow-shaft region (7) and is connected, in particular connected by a material-formed bond, to a second eye region and / or is embodied in one part, in particular in one piece, with the bolt (2) protruding through the second eye region, - with the second spring part (5) being supported on a region of the hollow-shaft part which is spaced apart in the circumferential direction from that region of the hollow-shaft part on which the first spring part (4) is supported, - and with the second spring part (5) being supported on a region of the hollow-shaft part which is arranged on that side of the bolt (2) which faces away in the circumferential direction from that region of the hollow-shaft part on which the first spring part (4) is supported, with the first spring part (4) being spaced apart in the circumferential direction from the second spring part (5), with, in order to effect stress relief, the first eye part (3) and the second eye part (6) each having elongate holes through which the bolts (2) are inserted, with the greatest internal width of the respective elongate hole being provided in a respective direction which is at a non-vanishing angle to the radial direction.

2. A gear wheel arrangement according to claim 1, characterised in that a respective segment (1) is connected to its [word missing] closest in the circumferential direction by means of screws (21).

3. A gear wheel arrangement according to claim 2, characterised in that each segment (1) has on its end region which is to the fore in the circumferential direction a first wall region, in particular which extends farther in the axial direction and in the radial direction than in the circumferential direction, with each segment (1) having on its end region which is to the rear in the circumferential direction a second wall region, in particular which extends farther in the axial direction and in the radial direction than in the circumferential direction, with the first wall region lying against a second wall region of a next-adjacent segment and being connected by means of the screws (21).

4. A gear wheel arrangement according to one of the preceding claims, characterised in that each segment (1) in particular in the circumferential direction has centrally a hollow portion (22) which has an axially continuous cutout.

5. A gear wheel arrangement according to one of the preceding claims, characterised in that the spring part (4) is a sheet-metal angled section and / or is a stamped and bent part, in particular with the bent edge being oriented axially.

6. A gear wheel arrangement according to one of the preceding claims, characterised in that the bolt (2) is inserted through a further first eye part (3) and a further second eye part (6), with the first spring part (4) being connected to the further first eye part (3) and the second spring part (5) being connected to the further second eye part (6), with the first eye part (3) being axially spaced apart from the further first eye part (3), with the second eye part (6) being axially spaced apart from the further second eye part (6).

7. A gear wheel arrangement according to one of the preceding claims, characterised in that each segment (1) has teeth of gearing on its radially outer side, with the gearing being spur-geared, in particular so that the teeth extend in the axial direction, or helical, in particular with the gearing protruding over the wall region at least partially in the circumferential direction.

8. A gear wheel arrangement according to one of the preceding claims, characterised in that the first and the second spring part (4, 5) are each formed of sheet steel.

9. A gear wheel arrangement according to one of the preceding claims, characterised in that the first and the second spring part (4, 5) each have a first region which lies tangentially on the hollow-shaft part, and each have a second region which is at a non-vanishing angle to the first region of the same spring part (4, 5), in particular with the angle having an angular value of between 5° and 50°.

10. A gear wheel arrangement according to one of the preceding claims, characterised in that with each segment (1) there is associated one-to-one, in particular therefore bijectively, a respective holding unit.