Noise-optimized planetary gearing

Abstract

The invention relates to a double helically toothed gearwheel for use as a planet or sun in a planetary gearing, comprising: a first part (1) and a second part (2), the first part (1) having a toothing with a rising toothing flank and the second part (2) having a toothing with a complementarily rising toothing flank; and the gearwheel, in particular the first part (1) and the second part (2), having a connecting device (3) which is designed to connect the first part (1) and the second part (2), the connecting device (3) also being designed to fix the first part (1) and the second part (2) against rotation with respect to one another and / or to position them with respect to one another. (Fig. 1)

Description

[0001] 120161P504PC 1 / 18 RENK GmbH

[0002] Description

[0003] Noise-optimized planetary gear

[0004] The present invention relates to a double helical gear and a planetary stage which, in particular, has at least one such gear.

[0005] The object of the present invention is to improve a double helical gear, in particular to improve the installation of the double helical gear.

[0006] This problem is solved by a gear according to claim 1. The dependent claims relate to advantageous further developments.

[0007] According to one embodiment of the present invention, a double helical gear is provided. In one embodiment, the double helical gear is configured to be used as a planet or sun gear in a planetary gear system, or the double helical gear is used as such. In one embodiment, the gear has a first part and a second part, wherein the first part has a tooth profile with a rising, in particular right-hand or left-hand rising, tooth flank, and the second part has a tooth profile with a complementary rising, in particular differently or additionally rising, further in particular left-hand or right-hand rising, tooth flank, in particular such that the two parts together form or can form a double helical gear.In one embodiment, the first part and the second part have a connecting device which, in one embodiment, is configured to connect the first part and the second part, in particular axially, in particular precisely and / or in such a way that the first part is rotationally fixed relative to the second part (at least substantially or within the limits of what is technically possible). In one embodiment, the connecting device is designed or configured to prevent a displacement or relative movement of the 120161P504PC 2 / 18 RENK GmbH.

[0008] To prevent or prevent movement between the first and second parts, in particular by ensuring that the first and second parts are not displaceable in the circumferential direction, especially relative to each other, or are fixed or held in place in relation to the other part, especially mechanically, particularly when the double helical gear, in one embodiment, is used or intended to be used as a sun symbol. In one embodiment, the connecting device is additionally or alternatively configured to position the first and second parts relative to each other and / or to guide or position the first and second parts relative to each other, especially axially, particularly when the double helical gear, in one embodiment, is used or intended to be used as a planet symbol.

[0009] The term "connecting device," as used herein, is preferably to be understood as a means and / or method for establishing a connection and / or positioning, particularly axial positioning. In one embodiment, this may refer to a device and / or means, such as, in particular, fastening means, for connecting, in particular, the first part of the gear to the second part of the gear, or to a method, such as, in particular, a method for producing a material-fit and / or form-fit connection. In one embodiment, the term "connecting device" is not to be understood as a device for producing backlash-free meshing of the parts of the (resulting double helical) gear with a different tooth configuration or gear.

[0010] Advantageously, this design allows for easier manufacturing of the double helical gear, particularly easier installation and assembly, especially because the division into parts and the connecting device permits sequential installation of the parts, or they can be installed one after the other, particularly in a gearbox, and furthermore, particularly in a planetary gearbox. Advantageously, this design allows for the double helical gear to be separable, particularly non-destructively, using the connecting device. 120161P504PC 3 / 18 RENK GmbH

[0011] can be separated. Advantageously, in one embodiment, this allows the parts of the double helical gear to be reconnected or reconnected without wear and / or with greater precision. Advantageously, in one embodiment, this allows the connecting device to prevent the first and second parts from rotating relative to each other, particularly when the double helical gear formed by the first and second parts is to be used or is used as a sun gear. Furthermore, when the double helical gear formed by the first and second parts is to be used or is used as a planet gear, the connecting device positions the first and second parts relative to each other, particularly because the planet gear is positioned relative to each other.the first part and the second part, especially in relation to a sun and / or a ring gear, self-align or can self-align.

[0012] In one embodiment, the connecting device has a bushing-like element. In another embodiment, the connecting device is alternatively or additionally designed as a bushing-like element, furthermore in particular as a bushing that can be fitted onto a shaft or is designed for this purpose. In one embodiment, the bushing-like element is designed to receive the first part of the double helical gear or the second part, in particular in a positive-locking manner. In another embodiment, the bushing-like element is designed to receive the first part of the double helical gear and the second part of the double helical gear, in particular in a positive-locking and / or friction-locking manner. In one embodiment, the first part or the second part has a...the connecting device, in particular such that the other part (of the first part and the second part) can be received or is received into the connecting device, which in particular has a bushing-like element or is designed as a bushing-like element, and furthermore in particular the bushing-like element is or can be used to receive the part. 120161P504PC 4 / 18 RENK GmbH.

[0013] Advantageously, this allows the parts to be installed or assembled separately in one design, and in particular, in one design, to be adaptable or adapted to an installation space, which advantageously makes the assembly of the double helical gear easier.

[0014] In one embodiment, the first part, the second part or both parts; one of the parts, both parts, and / or the connecting device, in particular additionally, has a surface which is configured to interact with one and / or the other part (of the first part and the second part) by friction, in particular such that a position or orientation of the parts of the gear relative to each other can be established or is established by means of the surface, in particular repeatably, and is further in particular maintained or can be maintained, in particular by means of a frictional connection, further in particular based on the and / or the surfaces.

[0015] Advantageously, this makes it possible, in one design, to manufacture the double helical gear more easily.

[0016] In one embodiment, the connecting device is designed as a connection with a fastening means, in particular comprising a screw connection, a rivet connection, and / or the like, in particular such that the connecting device can connect or does connect the first part and the second part by means of the fastening means, in particular by means of a screw, a rivet, and / or the like.

[0017] Advantageously, this allows, in one design, for the connection of the first part to the second part to be made more easily.

[0018] In one embodiment, the first part, the second part, and / or the connecting device, in particular the bushing-like element, includes a shaft connecting element. In one embodiment, this is 120161P504PC 5 / 18 RENK GmbH

[0019] The shaft connecting element is configured for a positive-locking connection with a shaft and / or the shaft connecting element has a section configured for a friction-locking connection with the shaft. In one embodiment, the shaft is a planetary shaft, in particular if the double helical gear (for use) is configured as a planet in a planetary gear set; or the shaft is a sun shaft, in particular if the double helical gear (for use) is configured as a sun, in particular (for use) with a sun shaft and / or on a sun shaft, in a planetary gear set. In one embodiment, at least one of the parts and / or the connecting device has a rotationally secure connection with a shaft, in particular a positive-locking and / or a friction-locking connection.In one embodiment, the connecting device comprises a shaft-hub connection, a keyway, a splined connection, a dowel pin, and / or the like, particularly for attaching the gear, or more specifically, a part of the gear, to a shaft. In another embodiment, the first part, the second part, or the connecting device is formed integrally with the shaft.

[0020] Advantageously, in one embodiment, this allows the gear to be mounted on a shaft, particularly a planetary shaft and / or a sun shaft, and furthermore, in particular, one part after the other, e.g., first the first part and then the second part or vice versa. This is particularly advantageous for double helical gears, especially because these are usually more difficult to mount due to the double helical teeth, especially compared to single helical gears.

[0021] In one embodiment, the connecting device has a face toothing or a planar serration (also known as Hirth toothing), wherein the face toothing or the planar serration is formed on the first part and is complementary on the second part and / or on the connecting device and at least one of the parts. In one embodiment, the planar serration is located between the tooth gaps of the first part and the second part.

[0022] Partially arranged, in particular such that the tool runout (during manufacturing) of the toothing of the parts and the (manufacturing of the) face-cut toothing coincide, at least substantially. In one embodiment, if the connecting device has a bushing-like element, the connecting device, in particular its bushing-like element, has face teeth or face-cut toothing, in particular in the axial direction of the gear or towards the end face of the first or second part, further in particular to connect the first part or the second part of the gear to the connecting device in a positive-locking manner.In one embodiment, if the first part and / or the second part has the connecting device, the connecting device has a face toothing or planar serration, particularly in the axial direction, furthermore particularly such that the first part and the second part can be connected by means of the, in particular axially complementary, face toothing or planar serration, or are connected by means of the face toothing or planar serration, or the face toothing or planar serration can be used or is used for this purpose.

[0023] Advantageously, in one embodiment, this allows the gear to be machined, particularly in a preliminary step, especially in an assembled state of the gear parts. Specifically, the tooth flanks can be prepared or formed for use in a transmission, particularly for the first and second parts. In another embodiment, the gear parts can be (re)separated, particularly for installation / assembly. With the aid of the connecting device, particularly the face-cut toothing, it is advantageously possible, in one embodiment, for the first and second parts of the gear to be positively connected during or after assembly, in the same orientation and / or position relative to each other as during machining.This allows, in one version, the gear to be (re)manufactured, in particular in the 120161P504PC 7 / 18 RENK GmbH.

[0024] finished form, furthermore in particular how, especially individually, manufactured for a gearbox or the gearbox.

[0025] In one embodiment, the connecting device has an elongated hole. In another embodiment, the elongated hole is designed to receive a fastening element. In another embodiment, the connecting device has a pinning option, in particular for pinning the first part and the second part, and in particular additionally to the elongated hole.

[0026] Advantageously, this allows, in one embodiment, the first part and the second part to be positioned, at least essentially, unambiguously relative to each other, particularly with the aid of the pinning. This, in one embodiment, advantageously allows a gear tooth to be produced more precisely.

[0027] In one embodiment, a double helical gear as described herein is used as a planet in a planetary stage. In another embodiment, a double helical gear as described herein is used as a sun in a planetary stage. In another embodiment, a planetary stage comprises a double helical gear as described herein, in particular as a planet or as a sun, or in particular as both a planet and a sun. In another embodiment, a double helical planetary stage is provided. In another embodiment, the planetary stage comprises a first double helical gear as described herein as the sun of the planetary stage and / or a second, in particular another, double helical gear as described herein as the planet of the planetary stage.

[0028] Advantageously, this allows the planetary stage to be manufactured more easily in one design, and in particular facilitates the assembly of the planetary stage.

[0029] According to one embodiment, a procedure for installing a planetary stage is provided. In one embodiment, the procedure involves installing the first 120161P504PC 8 / 18 RENK GmbH

[0030] Part of a double helical gear described herein, or the second part of a double helical gear described herein. In one embodiment, the method comprises adding the other part of the first part or the second part of the double helical gear described herein. In one embodiment, the adding comprises joining the first part and the second part using the joining device. In another embodiment, the joining is a separate step performed after the adding.

[0031] Advantageously, this allows, in one embodiment, the double helical gear to be manufactured more easily, in particular a planetary stage to be manufactured more easily, and in particular the planetary stage requires less installation space, especially because of the separate mounting of the first part and the second part (and / or the connecting device).

[0032] In one embodiment, the method includes a preliminary step in the manufacture of the double helical gear, in particular the first part, the second part, and the connecting device. In another embodiment, the parts of the gear are first joined, in particular by means of the connecting device (before installation in a gearbox or planetary gear set). In another embodiment, the flanks of the joined or assembled double helical gear are modified, in particular adapted, especially for the gearbox, in particular planetary gear set, for which the gear is intended. After the modification of the flanks, the gear can or is, in another embodiment, divided into its parts, in particular the first part and the second part; or the first part, the second part, and the connecting device, in particular such that the gear can be reassembled as for the modification.For this purpose, the gear and / or at least one of the parts may have a marking, or the gear and / or at least one of the parts may be marked, in particular in such a way that a position of the parts relative to each other - as in the case of the modification - can be restored, especially during the assembly of the gear. 120161P504PC 9 / 18 RENK GmbH.

[0033] According to one embodiment of the present invention, a system for manufacturing a double helical gear described herein is provided. In one embodiment, the system includes means for modifying and marking. In another embodiment, the system includes means for installing the first part or the second part; or the connecting device and the first part or the second part. In another embodiment, the system includes means for adding the other part (of the first part or the second part). In another embodiment, the system includes means for connecting the first part and the second part using the connecting device.

[0034] A device according to the present invention can be configured as hardware and / or software, in particular comprising at least one processing unit, preferably a microprocessor unit (CPU), graphics processing unit (GPU), or the like, preferably connected to a storage and / or bus system via data or signals, and / or comprising one or more programs or program modules. The processing unit can be configured to execute instructions implemented as a program stored in a storage system, to acquire input signals from a data bus, and / or to output signals to a data bus. A storage system can comprise one or more, in particular different, storage media, in particular optical, magnetic, solid-state, and / or other non-volatile media. The program can be configured to embody the methods described herein.is capable of executing, so that the processing unit can carry out the steps of such procedures and thus, in particular, operate or monitor the system.

[0035] A computer program product may, in one version, include a storage medium, in particular a computer-readable and / or non-volatile medium, for storing a program or instructions, or with a program or instructions stored thereon. In one version, the execution of this program or these instructions by a system or a controller, in particular a 120161P504PC 10 / 18 RENK GmbH

[0036] A computer or an arrangement of several computers, the system or the control, in particular the computer(s), for carrying out a procedure described herein or one or more of its steps, or the program or instructions for this purpose are set up.

[0037] In one embodiment, one or more, in particular all, steps of the procedure are fully or partially computer-implemented, or one or more, in particular all, steps of the procedure are fully or partially automated, in particular by the system or its means.

[0038] Further advantages and features will become apparent from the dependent claims and the exemplary embodiments. These are shown, in part schematically:

[0039] Fig. 1: a double helical gear according to an embodiment of the present invention;

[0040] Fig. 2: a double helical gear according to a further embodiment of the present invention;

[0041] Fig. 3: a double helical gear according to a further embodiment of the present invention;

[0042] Fig. 4: a double helical gear according to a further embodiment of the present invention;

[0043] Fig. 5: a double helical gear according to a further embodiment of the present invention; and

[0044] Fig. 6: a double helical gear according to a further embodiment of the present invention;

[0045] Fig. 7: A block diagram of a method for manufacturing a double helical gear according to an embodiment of the present invention. 120161P504PC 11 / 18 RENK GmbH

[0046] In the figures, identical reference symbols denote identical, similar, or corresponding elements. Elements depicted in the figures are not necessarily shown to scale. Rather, the various elements depicted in the figures are represented in such a way that their function and general purpose are understandable to a person skilled in the art.

[0047] Fig. 1 shows a double helical gear according to one embodiment of the present invention. The double helical gear is formed in two parts, in particular with a first part 1 and a second part 2, especially such that the pitch is arranged between the differently shaped flanks of the teeth, particularly centrally. In one embodiment, this allows the gear to be installed more easily, especially because parts 1, 2 and a shaft 4 can be inserted individually or (initially) separately into the installation space. This allows, in one embodiment, less installation space to be required and / or the assembly effort to be reduced.The gear further comprises a connecting device 3, which in the schematically shown embodiment is designed as a face gear or a face-cut toothing, in particular such that, in one embodiment, the opposing end faces of the first part 1 and the second part 2 can be secured against each other, in particular in a rotationally secure manner, by means of the face gearing or the face-cut toothing. Furthermore, Fig. 1 shows that, in particular in one embodiment, the connecting device 3 also comprises a fastening means, in particular a screw, which can be further secured, in particular by means of a nut, in particular to connect the first part 1 and the second part 2 or to secure the connection by means of the face gearing or the face-cut toothing. Furthermore, Fig. 1 shows a shaft 4 on which the parts 1 and 2 are arranged. In one embodiment, the parts can be frictionally locked (or positively locked - not shown in Fig. 1).1) be connected to wave 4.

[0048] Fig. 2 schematically shows another embodiment of a double helical gear. The first part 1 and the second part 2 are positively connected to the shaft, in particular via the key shown, which further, in particular, 120161P504PC 12 / 18 RENK GmbH

[0049] The connecting device 3 can be arranged in a keyway of the shaft. In one embodiment, the connecting device 3 has a material connection, which in one embodiment is realized between the opposite sides of the first part 1 and the second part 2 after installation or assembly of the parts 1, 2, in particular by means of a welding process, a brazing process and / or an adhesive bonding process, or a connection by welding, brazing and / or adhesive bonding. Accordingly, in one embodiment, the connection (or the connecting device 3) is established after assembly of the gear or after assembly of the parts 1, 2 of the gear, in particular if the (resulting or resulting) double helical gear is to be used or is used as a sun gear. In one embodiment, in particular if the (resulting or resulting) double helical gear is to be used or is used as a sun gear, the connecting device 3 is established after assembly of the gear or after assembly of the parts 1, 2 of the gear, in particular if the (resulting or resulting) double helical gear is to be used or is used as a sun gear.In this case, a material-bonded connection can be dispensed with, in particular because the first part 1 and the second part 2 align themselves relative to a sun and / or a ring gear, so that the connecting device 3 is designed to guide or position the parts 1, 2 relative to each other, in particular axially.

[0050] Fig. 3 schematically shows another embodiment of a double helical gear. The first part 1 and the second part 2 are aligned with respect to each other by means of a connecting device 3, which in the embodiment shown has a screw connection and a pinning, wherein the screw connection, which in one embodiment has an elongated hole, and the pinning, in particular by means of a pin in / and a fitting bore (which is arranged at least substantially in both parts 1, 2), are aligned in such a way that the first part 1 and the second part 2 are (again) placed in a position corresponding to a position which, in one embodiment, was established during the manufacture and / or machining of the gear teeth.

[0051] Fig. 4 schematically shows another embodiment of a double helical gear. Unlike the gears in Figures 1 to 3, the gear in Fig. 4 has a connecting element designed as a bushing 3.1. The bushing 3.1 is 120161P504PC 13 / 18 RENK GmbH

[0052] According to one embodiment, the bushing 3.1 is designed as a separate part. Furthermore, the bushing 3.1 is configured to receive the first part 1 and the second part 2, in particular such that the first part 1 and the second part 2 can be fixed or secured against each other by means of the bushing 3.1. For this purpose, the connecting device 3, in one embodiment, has a securing mechanism using a fastening element, in particular a screw or the like, which secures the first part 1 and the second part 2 in the bushing 3.1.

[0053] Fig. 5 schematically shows another embodiment of a double helical gear. The gear in Fig. 5, unlike that in Fig. 4, has a bushing 3.1 integrated into the first part 1. During assembly of the gear, particularly at its intended location, the second part 2 is positioned in the bushing formed in or on the first part 1. In one embodiment, the second part 2 is mechanically connected to the first part 1 by means of fasteners, in particular by means of a screw connection. The embodiment shown has a screw with a nut, in particular a secured nut. This is to be understood without limitation of generality. Other or different fasteners, in particular for this purpose, can also be used in embodiments.

[0054] Fig. 6 shows an embodiment which differs from that in Fig. 5 in that the fastening means is not installed in a through hole, in particular with a thread, through the first part 1 and the second part 2, but in a blind hole, in particular with a thread, in the first part 1 (with a through hole through the second part 2 which is complementary to the blind hole of the first part 1).

[0055] Fig. 7 schematically shows a block diagram of a method for installing a double helical gear. S10 denotes the installation of the first part 1 or the second part 2; in one embodiment, if the connecting device 3 has a socket 3.1, it denotes the installation of the socket 3.1. S20 denotes the addition of the and / or, in one embodiment, the other. 120161P504PC 14 / 18 RENK GmbH

[0056] Parts 1, 2, 3 of the gear. S30 denotes a connection of the first part 1 with the second part 2 of the gear using the connecting device 3.

[0057] In the present disclosure, "has an X" does not generally imply an exhaustive list, but is a shorthand for "has at least one X" and also includes "has two or more X" as well as "has Y in addition to X". Although exemplary implementations were explained in the preceding description, it should be noted that a multitude of variations are possible. Furthermore, it should be noted that the exemplary implementations are merely examples and are not intended to limit the scope of protection, applications, or structure in any way.Rather, the preceding description provides the skilled person with a guideline for implementing at least one exemplary embodiment, whereby various modifications, particularly with regard to the function and arrangement of the described components, can be made without leaving the scope of protection as defined by the claims and these equivalent combinations of features. 120161P504PC 15 / 18 RENK GmbH.

[0058] List of reference signs

[0059] 1 first part

[0060] 2 second part

[0061] 3 Connection device

[0062] 3.1 Bushing-like element / Bushing 4 Shaft

[0063] Install S10

[0064] S20 Addition

[0065] S30 Connect

Claims

120161P504PC 16 / 18 RENK GmbH Patent claims 1. Double helical gear for use as a planet or sun in a planetary gear set, comprising: a first part (1) and a second part (2), wherein the first part (1) has a toothing with a rising tooth flank and the second part (2) has a toothing with a complementary rising tooth flank; and wherein the gear, in particular the first part (1) and the second part (2), has a connecting device (3) which is configured to connect the first part (1) and the second part (2), wherein the connecting device (3) is further configured to fix the first part (1) and the second part (2) in a rotationally oriented manner relative to each other and / or to position them relative to each other.

2. Double helical gear according to the preceding claim, characterized in that the connecting device (3) has a bushing-like element (3.1) or is designed as a bushing-like element (3.1) which is configured to receive the first part (1) and / or the second part (2) of the double helical gear.

3. Double helical gear according to one of the preceding claims, characterized in that the first part (1) and / or the second part (2) has a positive locking element which is configured to interact with the other part (1, 2) and / or a shaft (4).

4. Double helical gear according to one of the preceding claims, characterized in that the first part (1), the second part (2) and / or the connecting device (3), in particular the bushing-like element (3.1), comprises a shaft connecting element configured for a positive-locking connection with a shaft (4) and / or has a section configured for a friction-locking connection with the shaft (4). 120161P504PC 17 / 18 RENK GmbH 5. Double helical gear according to one of the preceding claims, characterized in that the connecting device (3) has a planar serration, wherein the planar serration is formed on the first part (1 ) and complementarily on the second part (2) and / or on the connecting device (3) and at least one of the parts (1 , 2).

6. Double helical gear according to one of the preceding claims, characterized in that the connecting device (3) has an elongated hole which is designed to receive a fastening means and that the connecting device (3) has a pinning option for pinning the first part (1) and the second part (2).

7. Double helical gear planetary stage comprising a first double helical gear according to one of the preceding claims as the sun of the planetary stage and / or a, in particular another or further, double helical gear according to one of the preceding claims as the planet of the planetary stage.

8. Method for installing a planetary stage according to the preceding claim, comprising - Installing (S10) the first part (1) or the second part (2); - Adding (S20) the other part (1 , 2) of the first part (1 ) or of the second part (2); - Connect (S30) the first part (1 ) and the second part (2) using the connecting device (3).

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