Drive device having ring gear consisting of plurality of segments

Abstract

The utility model relates to a driving device with a gear ring consisting of a plurality of sections. Each section is provided with an inner ring section and an outer ring section, a supporting rod; an outer ring section having teeth; a first flange region; a second flange region; connecting bolts; the centering bolt and the inner ring section are arranged radially inside the outer ring section, both the first flange region and the second flange region and the struts connect the inner ring section to the outer ring section, and both the connecting bolt and the centering bolt pass through both the first flange region and the second flange region, the connecting bolt is arranged closer to the teeth than the centering bolt.

Description

Technical Field

[0001] The utility model relates to a drive device having a gear ring composed of a plurality of segments, wherein the segments are particularly identical to each other. Background Art

[0002] As is known, the ring gear can be composed of annular segments. Utility Model Content

[0003] Therefore, the object of the present invention is to improve a drive device which has improved running smoothness.

[0004] According to the invention, this object is achieved by a drive device having a toothed ring composed of a plurality of segments, which has the following features.

[0005] With regard to a drive device having a toothed ring consisting of a plurality of segments, which are in particular identical to one another, an essential feature of the invention is that each segment has:

[0006] - Inner ring segment;

[0007] - poles;

[0008] an outer ring segment having a toothing, in particular an external toothing, in particular a helical toothing; and

[0009] a first flange region, which is arranged at a front end region of the segment in the circumferential direction;

[0010] a second flange region, which is arranged at a rear end region of the segment in the circumferential direction;

[0011] - connecting bolts; and

[0012] - Centering bolts,

[0013] wherein the inner ring segment is arranged radially inside the outer ring segment, wherein both the first flange area and the second flange area as well as the struts each connect the inner ring segment to the outer ring segment,

[0014] In this case, both the connecting bolts and the centering bolts pass through the first flange area and the second flange area, respectively.

[0015] In this case, in particular in the radial direction, the connecting bolt is arranged closer to the toothing than the centering bolt and / or in this case the connecting bolt is arranged radially outside the centering bolt.

[0016] Therefore, according to the present invention, a drive device can be designed with a segmented ring gear that can be driven by a pinion, which exhibits improved running smoothness even at varying operating temperatures. In this case, the radially outer arrangement of the connecting bolts, and therefore their spatial proximity to the toothed area, prevents or minimizes the occurrence of play in the toothed area. Because the ring gear can expand radially outward at high temperatures, particularly on components that receive the ring gear, such as rollers or the like, and thus can create gaps between the segments, particularly at the radially outer edge regions, i.e., in the toothed area, the connecting bolts prevent this play. The resulting tensile stresses in the toothed area only slightly reduce running smoothness, but play can significantly reduce running smoothness.

[0017] It is also advantageous here to harden not only the toothing but also the corresponding flange region, wherein the hardening depth in the flange region preferably exceeds the hardening depth in the toothing region.

[0018] In an advantageous embodiment, the first flange area and / or the second flange area has a hardened surface. This has the advantage that the force action introduced by the connecting bolt is propagated all the way to the radial area covered by the external toothing and thus prevents the generation of (gaps) in this area.

[0019] In an advantageous embodiment, the first flange region and / or the second flange region has a hardening depth greater than 1.5 mm.

[0020] In particular, the radial area covered by the hardened area, in particular the hardened surface, overlaps with the radial area covered by the inner ring segment and with the radial area covered by the outer ring segment. This has the advantage that the forces introduced by the connecting bolts are transmitted all the way to the toothing area, where they are then pulled toward the adjacent segments, thereby preventing play. This prevents a reduction or weakening of the force transmission process introduced by the connecting bolts into the flange area due to an intermediate, unhardened and therefore more elastic intermediate area.

[0021] In an advantageous embodiment, the inner ring segment is connected to the drum, in particular by means of screws, on which the gear ring is mounted, so that the inner ring segment is fixedly connected to the drum in a rotationally fixed manner. This has the advantage that the drum can have a low or high temperature, and the gear ring can therefore be operated at either low or high temperatures.

[0022] In an advantageous embodiment, the toothing of the pinion meshes with the toothing, in particular the helical toothing, of the toothed ring. This has the advantage that the running smoothness during operation of the drive is improved, since play in the toothing region is avoided.

[0023] According to the present invention, the axial direction is parallel to the rotation axis of the gear ring, the radial distance is based on the rotation axis, and the circumferential direction is also based on the rotation axis.

[0024] In an advantageous design, no centering bolt is arranged radially inside each connecting bolt. Advantageously, the connecting bolt is arranged radially as close to the outside as possible near the toothing.

[0025] In an advantageous embodiment, each of the centering bolts has a cylindrical section arranged between two threaded sections.

[0026] Wherein, on corresponding threaded section, screw nut, particularly nut respectively. Advantage is that the tightening of nut can realize symmetrical tightening.

[0027] In one advantageous embodiment, each of the connecting bolts has a cylindrical section, a bolt head adjoining a first end of the cylindrical section, a threaded region adjoining a second end of the cylindrical section, and a nut, in particular a nut, being screwed onto the threaded region. This has the advantage that the connecting bolts can be tightened securely so that the nut and the bolt head of the connecting bolt press against the flange region.

[0028] In an advantageous embodiment, the cylindrical section of the respective connecting bolt is shorter, particularly in the thread direction, than the sum of the wall thickness of the first flange area and the wall thickness of the second flange area. This has the advantage that the nut and the bolt head of the respective connecting bolt press onto the flange areas of the sections that are most adjacent to one another.

[0029] In an advantageous embodiment, the cylindrical section of the respective centering bolt is longer, particularly in the thread direction, than the sum of the wall thicknesses of the first and second flange regions. This has the advantage that the centering function can be achieved without the flange regions of the adjacent sections being compressed.

[0030] In an advantageous embodiment, the section is made of steel, in particular austenitic ferritic cast iron with spheroidal graphite, in particular ADI. The advantage here is that high torques can be transmitted.

[0031] In an advantageous embodiment, the segment, together with its inner ring segment, outer ring segment, its struts and its flange region, is formed in one piece, in particular in one piece. The advantage here is that the segment can be loaded with high torques.

[0032] In an advantageous design, no connecting bolts are arranged radially inside each centering bolt. Advantageously, the connecting bolts are arranged radially outside, ie as close to the toothing as possible.

[0033] In an advantageous embodiment, the maximum outer diameter of the cylindrical section of the corresponding connecting bolt is smaller than the maximum outer diameter of the cylindrical section of the corresponding centering bolt. Advantageously, the surface pressure on the centering bolt is kept very low and overloading of the centering bolt can therefore be avoided.

[0034] In an advantageous embodiment, the distance between the two most adjacent connecting bolts is less than the distance between the two most adjacent centering bolts. Advantageously, the tightening force can be transmitted with low losses for compressing the toothed areas of the two most adjacent sections.

[0035] In an advantageous embodiment, the segments are arranged one after the other in the circumferential direction in such a way that they respectively touch their nearest adjacent segments. This has the advantage that the toothed ring can be manufactured in a simple manner.

[0036] In an advantageous embodiment, the normal direction of the respective flat surface of the front or rear flange region has an angle of less than 90° with respect to the axis of rotation of the ring gear and / or has an angle which is equal to the difference between 90° and the inclination angle of the helical toothing.

[0037] And / or, the flange area is arranged to be inclined corresponding to the inclination angle of the helical toothing. Here, it is advantageous that the flange area is inclined and thus inclined corresponding to the toothing.

[0038] The present invention is not limited to the above-mentioned feature combinations. For those skilled in the art, in particular based on the objectives proposed and / or the objectives proposed by comparison with the prior art, other reasonable combinations of the above-mentioned feature combinations and / or individual features and / or the features to be described below and / or the features of the accompanying drawings may be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Now describe the utility model in detail according to the schematic diagram:

[0040] Figure 1 , a drive device according to the invention is shown in a front view, which has a toothed ring composed of a plurality of identical segments 1 .

[0041] Figure 2 Segment 1 is shown in a side view.

[0042] Figure 3 Segment 1 is shown in an oblique view.

[0043] Figure 4 The connecting bolts are shown in a side view.

[0044] Figure 5 The centering bolt is shown in a side view.

[0045] List of reference numerals:

[0046] 1 section

[0047] 2 small gears

[0048] 3 rollers

[0049] 20 inner ring segment

[0050] 21 Flange area

[0051] 22 Outer ring segment with helical teeth

[0052] 23 poles

[0053] 30 Second hole

[0054] 31 First Hole

[0055] 40 Bolt head

[0056] 41 cylindrical segments

[0057] 42 thread segments

[0058] 50 cylindrical segments

[0059] 51 threaded section DETAILED DESCRIPTION

[0060] As shown in the figures, the drive device has a toothed ring consisting of segments 1 arranged one after the other in the circumferential direction, which is fixed to a drum 3 having an elevated temperature relative to the surroundings. The toothed ring has an external toothing and is driven by a pinion 2 meshing with the external toothing.

[0061] The individual segments that are closest to one another are aligned relative to one another by means of centering screws and are connected to one another by means of connecting screws.

[0062] Due to the increased temperature of the drum 3, the outer diameter of the drum 3 increases and gaps can form between the segments 1 that are closest to each other. In particular, in the area of ​​the outer toothing, such gaps can cause disturbances.

[0063] The segment 1 is preferably made of steel, in particular of austenitic ferritic cast iron with spheroidal graphite, in particular ADI.

[0064] Each segment 1 has an inner ring segment 20 which is connected via struts 23 to an outer ring segment 22 with helical toothing and arranged radially outside the inner ring segment 20 .

[0065] The ring axis of the inner ring segment 20 is coaxial with the ring axis of the outer ring segment 22 and with the axis of rotation of the gear ring.

[0066] A flange region 21 is arranged at the front and rear end regions of the segment 1 in the circumferential direction, respectively, which connects the inner ring segment 20 to the outer ring segment 22 and has a greater hardening depth, in particular a quenching depth, than the remaining segment 1 .

[0067] Preferably, the hardening depth exceeds 1.5 mm.

[0068] The outer toothing is preferably designed as a helical toothing. Thus, the flange region 21 is inclined at the end located in the front and at the end located in the rear in the circumferential direction by the inclination angle of the outer toothing.

[0069] The flange area 21 of the respective segment 1 is connected to the flange area 21 of the segment 1 closest to the respective segment 1. Here, the two flange areas abut against each other and both the centering screws and the connecting screws pass through the two flange areas, in particular in the tangential direction.

[0070] In this case, the centering bolt is inserted through the second hole 30 , which has a larger clear diameter than the first hole 31 provided for inserting the connecting bolt.

[0071] The corresponding connecting screw has a cylindrical section 41 which adjoins the screw head 40 and which, on its side facing away from the screw head 40, adjoins a threaded section 42. A nut is screwed onto the threaded section 42 so that, after the nut has been screwed on, the screw head 40 presses the first flange area 21 against the further flange area 21, which is pressed against the first flange area 21 by the nut.

[0072] The cylindrical section 41 is preferably designed to be shorter than twice the wall thickness of the corresponding flange region 21 .

[0073] The respective centering bolts have a cylindrical section 50, which adjoins a respective threaded section 51 on both sides. The cylindrical section 50 is preferably designed to be longer than twice the wall thickness of the respective flange area 21. Although nuts are screwed onto the threaded sections 51 of the respective centering bolts, these nuts are not used, or only to a very small extent, to press the adjacent, contacting flange areas 21 together, but are primarily or exclusively used to position the adjacent, contacting flange areas 21 relative to each other.

[0074] The radial distance between the first hole 31 and the rotation axis of the gear ring is greater than the radial distance between the second hole 30 and the rotation axis of the gear ring.

[0075] The minimum distance in the case of the first hole 31 is smaller than the minimum distance in the case of the second hole 30 .

[0076] The distance between two first holes 31 that are most adjacent to each other is smaller than the distance between two second holes 30 that are most adjacent to each other.

[0077] The connecting bolts are therefore arranged in a much narrower grid than the centering bolts. This prevents play in the toothing area, as the connecting bolts are arranged closer to the toothing area than the centering bolts.

[0078] In particular, the hole pattern of the four second holes 30 forms a rectangle. In particular, the distances between the first holes 31 are at least partially different from each other.

[0079] In other embodiments according to the present invention, the first holes 31 are evenly spaced apart from each other.

Claims

1. A drive device having a toothed ring consisting of a plurality of segments (1), said segments being identical to one another, Each section has: - Inner ring segment; - poles; - an outer ring segment with external toothing; a first flange region, which is arranged at a front end region of the segment in the circumferential direction; a second flange region, which is arranged at a rear end region of the segment in the circumferential direction; -Connecting bolts; - Centering bolts, The inner ring segment is arranged radially inside the outer ring segment, and the first flange area, the second flange area and the struts respectively connect the inner ring segment with the outer ring segment. It is characterized by: The connecting bolts and the centering bolts pass through the first flange area and the second flange area respectively.

2. Drive device with a toothed ring consisting of a plurality of segments (1) according to claim 1, characterized in that The outer teeth are helical teeth.

3. The drive device having a toothed ring composed of a plurality of segments (1) according to claim 1, characterized in that In the radial direction, the connecting bolt is closer to the outer toothing than the centering bolt, and / or the connecting bolt is arranged radially outside the centering bolt.

4. Drive device according to any one of claims 1 to 3, comprising a toothed ring consisting of a plurality of segments (1), It is characterized by: The first flange region and / or the second flange region has a hardened surface, and / or, The first flange region and / or the second flange region has a hardening depth greater than 1.5 mm, The radial extent covered by the hardened surface overlaps with the radial extent covered by the inner ring segment and overlaps with the radial extent covered by the outer ring segment.

5. Drive device according to any one of claims 1 to 3, comprising a toothed ring consisting of a plurality of segments (1), It is characterized by: The inner ring segment is connected to the drum by means of bolts, and the gear ring is mounted on the drum. The inner ring segment is thus connected to the drum in a non-rotatable manner. and / or, The teeth of the pinion mesh with the outer teeth of the ring gear.

6. Drive device according to any one of claims 1 to 3, comprising a toothed ring consisting of a plurality of segments (1), It is characterized by: The axial direction is parallel to the rotation axis of the gear ring, the radial distance is based on the rotation axis, and the circumferential direction is based on the rotation axis.

7. Drive device according to any one of claims 1 to 3, comprising a toothed ring consisting of a plurality of segments (1), It is characterized by: No centering bolt is arranged radially inwardly of each connecting bolt.

8. Drive device according to any one of claims 1 to 3, comprising a toothed ring consisting of a plurality of segments (1), It is characterized by: Each of the centering bolts has a cylindrical section which is arranged between two threaded sections. The nuts are each screwed onto the corresponding threaded sections.

9. Drive device according to claim 8, comprising a toothed ring consisting of a plurality of segments (1), It is characterized by: Each of the connecting bolts has a cylindrical section, a bolt head adjoining a first end of the cylindrical section, and a threaded region adjoining a second end of the cylindrical section, onto which a nut is screwed.

10. Drive device according to claim 9, comprising a toothed ring consisting of a plurality of segments (1), It is characterized by: In the threading direction, the cylindrical section of the respective connecting screw is shorter than the sum of the wall thickness of the first flange region and the wall thickness of the second flange region.

11. Drive device according to claim 8, comprising a toothed ring consisting of a plurality of segments (1), It is characterized by: In the thread direction, the cylindrical section of the respective centering screw is longer than the sum of the wall thickness of the first flange region and the wall thickness of the second flange region.

12. Drive device according to any one of claims 1 to 3, comprising a toothed ring consisting of a plurality of segments (1), It is characterized by: The segments are made of steel.

13. Drive device with a toothed ring consisting of a plurality of segments (1) according to any one of claims 1 to 3, characterized in that The segments are made of austenitic ferritic cast iron with spheroidal graphite.

14. Drive device with a toothed ring consisting of a plurality of segments (1) according to claim 12, characterized in that The segments are made of ADI.

15. Drive device according to any one of claims 1 to 3, comprising a toothed ring consisting of a plurality of segments (1), It is characterized by: The segment is formed integrally with its inner ring segment, outer ring segment, its struts and its first and second flange areas.

16. Drive device according to any one of claims 1 to 3, comprising a toothed ring consisting of a plurality of segments (1), It is characterized by: No connecting bolts are arranged radially inside each centering bolt.

17. Drive device according to claim 9 having a toothed ring consisting of a plurality of segments (1), It is characterized by: The maximum outer diameter of the cylindrical section of the corresponding connecting bolt is smaller than the maximum outer diameter of the cylindrical section of the corresponding centering bolt.

18. Drive device according to any one of claims 1 to 3, comprising a toothed ring consisting of a plurality of segments (1), It is characterized by: The distance between two connecting bolts that are closest to one another is smaller than the distance between two centering bolts that are closest to one another.

19. Drive device with a toothed ring consisting of a plurality of segments (1) according to claim 2, It is characterized by: The segments are arranged one after the other in the circumferential direction in such a manner that they respectively contact their nearest neighboring segments. and / or, the normal direction of the respective flat surface of the first flange region or the second flange region has an angle with respect to the axis of rotation of the toothed ring that is smaller than 90° and / or has an angle that is equal to the difference between 90° and the inclination angle of the helical toothing, And / or, the first flange region and the second flange region are arranged to be inclined according to the inclination angle of the helical toothing.

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