System comprising a gear and a testing machine

Abstract

The invention relates to a system comprising a gear and a testing machine, having - a turntable that can be rotated by an electric drive, - a first linear axis, - a second linear axis, - a pinion connected in a rotationally fixed manner to a shaft, - a second drive, wherein brackets are connected in a rotationally fixed manner to the turntable, wherein the gear is connected to the turntable in a rotationally fixed manner by means of the brackets, wherein the pinion is engaged with the gear.

Description

[0001] System comprising a gear and a testing machine

[0002] Description:

[0003] The invention relates to a system comprising a gear and a testing machine.

[0004] It is generally known that a linear axis is a machine element for components that can be moved along a straight line.

[0005] From DE 10 2011 011 946 A1, a method for measuring and testing a workpiece is known as the closest prior art.

[0006] A gear testing machine is known from CN 1 03 969 B.

[0007] A gear positioning device is known from DE 11 2018 005 472 T5.

[0008] A segmented gear ring is known from US 2014 / 0 208 880 A1.

[0009] A gearbox testing machine is known from CN 2 13 616 064 U.

[0010] The invention is therefore based on the object of making the testing machine capable of testing the gear under operating conditions.

[0011] According to the invention, the object is achieved by the features specified in claim 1.

[0012] Important features of the invention in the system comprising a gear and a testing machine are that the system has a rotary table rotatable by an electric drive, a first linear axis, a second linear axis, a pinion connected in a rotationally fixed manner to a shaft, a second drive, in particular for the shaft, wherein holders are connected in a rotationally fixed manner to the rotary table, wherein the gear is connected in a rotationally fixed manner to the rotary table by means of the holders, wherein the pinion is in engagement with the gear, in particular wherein the toothing of the pinion is in engagement with the toothing of the gear, wherein the axial distance between the gear and the pinion is controllable by means of the second linear axis, wherein the axial position of the pinion relative to the axial position of the gear is controllable by means of the first linear axis,in particular wherein the pinion can be braked by means of the second drive or wherein the torque transmitted from the electric second drive of the gear to the pinion via the gear to the second drive.,

[0013] An advantage here is that the testing machine can monitor the sound generated during the rotation of the gear. Preferably, the sound, particularly structure-borne sound, is detected by a sensor, and the sensor signal is subjected to Fourier analysis, and the resulting spectrum is monitored for exceeding a threshold value assigned to a particular frequency range. Furthermore, the testing machine can monitor other gear meshing conditions, such as the contact area during meshing and the backlash, particularly the flank backlash, of the meshing. Furthermore, the concentricity and other parameters for the precision of the gear assembly, particularly the relative alignment of the segments to one another, can be tested. For this purpose, at least one corresponding sensor is additionally arranged in the testing machine.

[0014] It is also important that the gear's rotational axis is aligned vertically, even though the gear is intended to operate with a horizontally oriented rotational axis under real operating conditions, for example, in a cement mill. The gear is therefore intended to operate in a different orientation than in the testing machine, with the rotational axis being aligned perpendicular to the gear's rotational axis in the testing machine during the intended operation.

[0015] In an advantageous embodiment, the shaft comprises a shaft piece that is non-rotatably connected by means of a chuck to an adapter shaft that can be set into rotation or braked by a second drive. An electromagnetically actuated brake or clutch is arranged on the second drive. In particular, the second drive comprises an electric motor, in particular one supported on the lower support arm. Advantageously, the shaft piece with the pinion pushed onto it can be replaced with another shaft piece, whereby the second drive driving the shaft piece does not need to be replaced but can be retained.

[0016] In an advantageous embodiment, the gearwheel comprises segments arranged one behind the other in the circumferential direction, wherein the adjacent segments are connected to one another by means of screws, in particular wherein each segment has a toothed region. Advantageously, the gearwheel is designed in segments and is held during operation by another component, such as a drum, in particular a cement drum, of a cement mill. Since the testing machine lacks the component that secures the gearwheel, the gearwheel is held by a plurality of brackets. The segments are screw-connected to one another.

[0017] The segments enable the production of a large gear using a small gear cutting machine, which finely machines the toothed area of ​​the segment, particularly by milling or grinding. In particular, the gear is therefore larger than the gear cutting machine used. Likewise, the gear can be produced on a gear cutting machine that is smaller than the gear cutting machine.

[0018] In an advantageous embodiment, the number of segments equals the number of mounts, in particular, each segment being secured to the turntable by at least one of the mounts. It is advantageous that each segment is individually held by at least one mount. In particular, however, the screw connection between the segments also improves the stability of the assembly.

[0019] In an advantageous embodiment, the first linear axis is aligned perpendicular to the second linear axis. This is advantageous because, on the one hand, the center distance, i.e., the radial position of the pinion, is controllable, and, on the other hand, the axial relative position of the pinion to the gear.

[0020] In an advantageous embodiment, the pinion's rotational axis is aligned parallel to the first linear axis, in particular vertically. This has the advantage that the axial position of the pinion is adjustable, and thus the width of the tooth engagement is also adjustable.

[0021] In an advantageous embodiment, the rotational axis of the gear is aligned parallel to the first linear axis and / or the rotational axis of the pinion, in particular vertically aligned. It is advantageous that the pinion and the gear can be designed with spur gear teeth.

[0022] In an advantageous embodiment, the maximum diameter of the turntable is smaller than the maximum diameter of the gear. The advantage here is that the gear can be larger than the turntable, meaning the gear ring would fall off the turntable if the holders were missing. The gear can be fastened to the turntable by means of the holders, with the axis of the gear being aligned coaxially to the axis of rotation of the turntable. In an advantageous embodiment, the gear is ring-shaped and / or designed as a gear ring, with the maximum diameter of the turntable being smaller than the clear inside diameter of the gear, in particular wherein the radial distance range covered by the holders overlaps with the radial distance range covered by the turntable and with the radial distance range covered by the gear, in particular wherein the turntable is radially spaced from the gear.The advantage here is that the gear wheel, designed as a ring gear, can be precisely assembled from segments because the testing machine can limit deviations from the target position and target alignment to a permissible level.

[0023] In an advantageous embodiment, the second linear axis is aligned perpendicular to the axis of rotation of the pinion and perpendicular to the axis of rotation of the gear,

[0024] In an advantageous embodiment, the pinion can be brought into engagement with the gear via the second linear axis. Advantageously, the pinion can be positioned radially relative to the gear via the second linear axis.

[0025] In an advantageous embodiment, the first support arm and the second support arm, which is spaced apart from the first support arm, are movable by the second linear axis, particularly in the vertical direction. Advantageously, the vertical height of the pinion can be adjusted to the vertical position of the gear.

[0026] In an advantageous embodiment, a support bearing which rotatably supports the shaft is accommodated in the second, in particular lower, holding arm, and / or a bearing which rotatably supports the shaft is accommodated in the first holding arm. It is advantageous in this case that the support bearing is positioned against a step of the second holding arm. In an advantageous embodiment, a sensor, in particular a structure-borne sound sensor and / or angle sensor, is arranged on the second holding arm and can move with the holding arm, in particular when the linear axes move. It is advantageous in this case that the values ​​of a physical quantity, in particular structure-borne sound, can be recorded as close as possible to the engagement area.

[0027] In an advantageous embodiment, a mandrel area is formed on the second support arm, which supports the shaft. This is advantageous because the shaft is stably mounted.

[0028] In an advantageous embodiment, the mounts protrude radially above the rotary table, with the area covered by the mounts in the axial direction overlapping with the area covered by the rotary table in the axial direction and with the area covered by the gear in the axial direction. This is advantageous because, despite the size of the gear, it can be tested on the testing machine. In particular, the gear can be set in rotation by a rotary table that is much smaller than the gear itself.

[0029] In an advantageous embodiment, the center distance between the gear and the pinion can be controlled by means of the linear position of the second linear axis. Advantageously, the pinion can be moved toward the gear and brought into engagement.

[0030] In an advantageous embodiment, the first linear axis is driven by a first synchronous motor, and / or the second linear axis is driven by a second synchronous motor. The advantage here is that the linear axis can be moved to the respective intended linear positions, particularly with high precision.

[0031] Further advantages emerge from the dependent claims. The invention is not limited to the combination of features in the claims. Further possible combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent to those skilled in the art, particularly from the problem and / or the problem posed by comparison with the prior art.

[0032] The invention will now be explained in more detail using schematic illustrations:

[0033] Figure 1 shows a side view of a testing device according to the invention, in particular a testing machine, for a segmented gear 1, wherein the gear is in engagement with a pinion 2.

[0034] In Figure 2, an area of ​​the pinion 2 mount is schematically sketched.

[0035] As shown in the figures, the testing device comprises a rotary table 8, which can be set in rotation by an electric drive. The rotation axis of the rotary table 8 is preferably oriented vertically.

[0036] Mounted on the rotary table are brackets 9 which hold the segmented gear 1.

[0037] The brackets 9 are detachably connected to both the rotary table 8 and the gear 1. The gear 1 is composed of segments that are screwed together.

[0038] The segments are arranged one after the other in the circumferential direction - relative to the axis of rotation of the gear - and are connected to each other by means of tangentially directed screws.

[0039] The number of segments of gear 1 is between five and forty.

[0040] Each of the segments has a toothing, in particular straight toothing or helical toothing, on its radially outer circumference.

[0041] The rotation axis of the rotary table 8 is aligned coaxially with the rotation axis of the gear.

[0042] The radial direction is always relative to the rotational axis of the rotary table 8. The axial and circumferential directions are also always relative to the rotational axis of the rotary table. The segments are identical to each other.

[0043] The pinion 2, which is in engagement with the gear 1, is driven by the gear 1 and has an axis of rotation aligned parallel to the axis of rotation of the gear 1.

[0044] The gear 1 is held by means of holders 9 arranged on the rotary table 8. The holders 9 are spaced apart from each other in the circumferential direction, in particular evenly spaced.

[0045] The pinion 2 is connected in a rotationally fixed manner to a shaft piece or the pinion 2 is designed in one piece, in particular in one piece, with a shaft piece.

[0046] Preferably, the shaft piece is connected in a rotationally fixed manner to a chuck 20 and to an adapter flange 21 and is therefore referred to below as a multi-part shaft 3.

[0047] Shaft 3 is rotatably mounted on two support arms (4, 6), which also hold it. The rotational axis of shaft 3 is preferably vertically aligned.

[0048] For this purpose, a lower support arm 6 accommodates a support bearing 22, which rotatably supports the shaft 3 and supports it from below. The upper support arm 4 also accommodates a bearing that rotatably supports the shaft 3.

[0049] The two holding arms (4, 6) are arranged to be displaceable by means of a first linear axis 5.

[0050] Thus, the pinion 2 can be moved linearly by means of the first linear axis 5, in particular in the vertical direction.

[0051] The first linear axis 5 and thus also the pinion 2 can be moved, in particular horizontally, by means of a second linear axis 7.

[0052] The displacement direction of the first linear axis 5 is preferably oriented perpendicular to the displacement direction of the second linear axis 7. Thus, the axial distance between the rotational axis of the gear and the rotational axis of the pinion can be controlled by means of the linear axis 7.

[0053] The axes of rotation of gear 1 and pinion 2 are therefore parallel.

[0054] To test gear 1, linear axis 7 is moved such that pinion 2 engages with gear 1. This allows the meshing of the gears to be tested as gear 1 rotates. Since gear 1 is composed of segments connected by screws, the testing device can monitor the meshing conditions and thus verify the precision of the connection between the segments.

[0055] The holders 9 are attached to the rotary table 8 and protrude radially beyond the rotary table 8. Thus, a gear 1 can be tested whose diameter is larger than the maximum diameter of the rotary table 8. Therefore, the gear 1 cannot be assembled from the segments on the rotary table.

[0056] With the vertically directed linear axis 5, the pinion 2 can be moved in the vertical direction and thus aligned with the gear 1.

[0057] The rotary table 8 is driven by the electric drive. The pinion 2 is thus driven by the gear 1. To achieve a predetermined load during meshing, a drive 23 is provided, which transfers the power supplied by the gear 1 to the pinion 2.

[0058] A synchronous motor, preceded by a gear, is preferably used as drive 23.

[0059] The support bearing 22 is accommodated in the lower holding arm 6 to rotatably hold the pinion 2.

[0060] The drive 23 is arranged below the support arm 6, i.e., on the side of the support arm 6 facing away from the support bearing 22. An angle encoder 24 of a sensor is arranged on the drive 23, so that the sensor can detect a value of the angular position of the shaft 3. The signals from the sensor are fed to a controller, which generates control signals for the drive 23 and for the electric drive of the rotary table 8.

[0061] At its downward-facing end in the direction of gravity, the shaft 3 is supported on a mandrel 26, which acts both as a support and as a centering element. The mandrel 26 is arranged in or on the lower support arm.

[0062] Preferably, a clutch or brake 25 is arranged below the electric drive 23 in the direction of gravity. Thus, the torque transmission from the shaft 3 to the drive 23 via the clutch or brake 25 can be interrupted, depending on the state of the clutch or brake 25. In this way, the load can be suppressed or controlled.

[0063] A shaft sealing ring is arranged axially next to the support bearing 22, which seals the lower holding arm 6 towards the shaft 3.

[0064] Each linear axis (5, 7) is preferably driven by a synchronous motor.

[0065] Preferably, the electric drive of the rotary table 8 is motor-driven, and the drive 23 is generator-driven. This allows the concentricity of the gear 1 and other parameters of the gear 1 to be tested quickly and easily. However, with motor-driven operation of the second drive 23, in particular, and generator-driven operation of the electric drive, i.e., the first drive, a test can be performed that more closely approximates real-world operating conditions.

[0066] In further embodiments according to the invention, the number of segments equals the number of holders 9. Thus, each segment is held by exactly one holder 9. List of reference symbols

[0067] 1 segmented gear

[0068] 2 pinions

[0069] 3 Wave

[0070] 4 upper support arm

[0071] 5 Linear axis, vertical

[0072] 6 lower support arm

[0073] 7 Linear axis, horizontal

[0074] 8 Turntable

[0075] 9 Bracket

[0076] 20 chucks

[0077] 21 Adapter shaft

[0078] 22 support bearings

[0079] 23 Drive

[0080] 24 angle sensors

[0081] 25 Clutch or brake

[0082] 26 Thorn

Claims

Patent claims:

1. A system comprising a gear and a testing machine, having a rotary table rotatable by an electric drive, a first linear axis, a second linear axis, a pinion connected in a rotationally fixed manner to a shaft, and a second drive, in particular for the shaft, characterized in that holders are connected in a rotationally fixed manner to the rotary table, wherein the gear is connected in a rotationally fixed manner to the rotary table by means of the holders, wherein the pinion is in engagement with the gear, in particular wherein the toothing of the pinion is in engagement with the toothing of the gear, wherein the axial distance between the gear and the pinion is controllable by means of the second linear axis, wherein the axial position of the pinion relative to the axial position of the gear is controllable by means of the first linear axis,in particular wherein the pinion can be braked by means of the second drive or wherein the torque transmitted from the electric second drive of the gear to the pinion via the gear to the second drive., 2. System according to claim 1, characterized in that the shaft has a shaft piece which is connected in a rotationally fixed manner by means of a chuck to an adapter shaft which can be set in rotation or braked by the second drive, wherein an electromagnetically actuated brake or clutch is arranged on the second drive, in particular wherein the second drive comprises an electric motor, in particular which is supported on a lower holding arm.

3. System according to one of the preceding claims, characterized in that the gear wheel has segments arranged one behind the other in the circumferential direction, wherein the segments which are nearest to one another are connected to one another by means of screws, in particular wherein each segment has a toothed region.

4. System according to one of the preceding claims, characterized in that the number of segments is equal to the number of holders, in particular wherein each segment is attached to the turntable by at least one of the holders.

5. System according to one of the preceding claims, characterized in that the first linear axis is aligned perpendicular to the second linear axis.

6. System according to one of the preceding claims, characterized in that the axis of rotation of the pinion is aligned parallel to the first linear axis, in particular is aligned vertically, and / or the axis of rotation of the gear is aligned parallel to the first linear axis and / or to the axis of rotation of the pinion, in particular is aligned vertically.

7. System according to one of the preceding claims, characterized in that the maximum diameter of the rotary table is smaller than the maximum diameter of the Gear and / or that the gear is designed in a ring-like manner and / or as a gear ring, wherein the maximum diameter of the rotary table is smaller than the clear inner diameter of the gear, in particular wherein the radial distance region covered by the holders overlaps with the radial distance region covered by the rotary table and with the radial distance region covered by the gear, in particular wherein the rotary table is radially spaced from the gear.

8. System according to one of the preceding claims, characterized in that the second linear axis is aligned perpendicular to the axis of rotation of the pinion and perpendicular to the axis of rotation of the gear, and / or that the pinion can be brought into engagement with the gear with the second linear axis.

9. System according to one of the preceding claims, characterized in that a first holding arm and a second holding arm spaced from the first holding arm are movable by the second linear axis, in particular in the vertical direction.

10. System according to one of the preceding claims, characterized in that a support bearing is accommodated in the second, in particular in the lower, holding arm, which rotatably supports the shaft and / or that a bearing is accommodated in the first holding arm, which rotatably supports the shaft.

11. System according to one of the preceding claims, characterized in that a sensor, in particular a structure-borne sound sensor and / or angle sensor, is arranged on the second holding arm and can be moved with the holding arm, in particular when the linear axes move.

12. System according to one of the preceding claims, characterized in that a mandrel region is formed on the second holding arm, which supports the shaft.

13. System according to one of the preceding claims, characterized in that the holders project radially above the turntable, wherein the area covered by the holders in the axial direction overlaps with the area covered by the turntable in the axial direction and with the area covered by the gear in the axial direction.

14. System according to one of the preceding claims, characterized in that the axial distance between the gear and the pinion is controllable by means of the linear position of the second linear axis.

15. System according to one of the preceding claims, characterized in that the first linear axis is driven by a first synchronous motor, and / or that the second linear axis is driven by a second synchronous motor.

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