US-12624753-B2 - Planet carrier, planetary drive for a vehicle having the planet carrier and set comprising a plurality of planet carriers

US12624753B2US 12624753 B2US12624753 B2US 12624753B2US-12624753-B2

Abstract

A planet carrier includes a central axis, a pair of carrier shells, planet wheels and riveting devices. Each carrier shell has planetary wheel sections and connecting sections. The connecting sections are arranged as forming sections recessed relative to the planetary gear sections. Each of the planetary wheels is disposed in a planetary wheel section and the riveting devices connect the carrier shells at the connecting sections. Each riveting device is oriented in a circumferential direction around the central axis, is formed in one piece from one material, and has an H-shape. The H-shape is formed from a web section arranged as a spacer between the carrier shells and a rivet section with a pair of single rivets. Each single rivet has a rivet head disposed on one of the carrier shells to fix the one of the carrier shells on the web section.

Inventors

Niklas Kretschmer
Michael Keck
Manuel Seubert

Assignees

Schaeffler Technologies AG & Co. KG

Dates

Publication Date: 20260512
Application Date: 20220425
Priority Date: 20210519

Claims (17)

1 . A planet carrier, the planet carrier defining a central axis, the planet carrier comprising: two carrier shells, the carrier shells each having planetary wheel sections and connecting sections, planetary wheels, the planetary wheels being arranged in the planetary wheel sections, and several riveting devices, the riveting devices connecting the carrier shells in the connecting sections, wherein the connecting sections of at least one of the carrier shells are designed as forming sections which are recessed relative to the planetary wheel sections, and the riveting devices each have a rivet section for each carrier shell and a web section, the web section being designed as a spacer between the carrier shells, each of the rivet sections has two single rivets, so that the riveting device has an H-shape, the riveting devices each being made of one material or in one piece, the single rivets having rivet heads which are located on the carrier shells, rest on them, and fix them in a positively locking manner in an axial direction on the web section, the riveting devices each being oriented in the same direction in a circumferential direction around the central axis, wherein: the two single rivets of the rivet section lie centrally or symmetrically on a chord of a circle around the central axis and the web section is aligned along the chord; or the two single rivets of the rivet section lie on a tangent to a circle around the central axis and the web section is aligned along the tangent.
2 . The planet carrier according to claim 1 , wherein each riveting device is made from a flat plate component or a stamped part with an H-shape by forming the single rivets into the rivet heads.
3 . The planet carrier according to claim 1 , wherein each carrier shell has a common rivet opening for a rivet section or for the two single rivets.
4 . The planet carrier according to claim 1 , wherein both carrier shells have corresponding planetary wheel sections and forming sections.
5 . The planet carrier according to claim 4 , wherein the carrier shells are constructed identically or symmetrically to one another.
6 . The planet carrier according to claim 1 , wherein the planet carrier has four planetary wheel sections and four connecting sections.
7 . A planetary drive for a vehicle, comprising the planet carrier according to claim 1 .
8 . A set of a plurality of planet carriers according to claim 1 , wherein the planet carriers each have the same carrier shells, the riveting devices having different axial lengths of the web section, so that: the carrier shells of the planet carriers have different axial distances; or the planet carriers have planetary wheels of different widths.
9 . A planet carrier comprising: a central axis; a pair of carrier shells, each carrier shell comprising planetary wheel sections and connecting sections, the connecting sections arranged as forming sections recessed relative to the planetary wheel sections; a plurality of planetary wheels, each disposed in a planetary wheel section; and a plurality of riveting devices connecting the carrier shells at the connecting sections, each riveting device: oriented in a circumferential direction around the central axis; formed in one piece from one material; and comprising an H-shape formed from: a web section arranged as a spacer between the carrier shells; and a rivet section comprising a pair of single rivets, each single rivet comprising a rivet head disposed on one of the carrier shells to fix the one of the carrier shells on the web section, wherein each pair of single rivets lies centrally or symmetrically on a chord of a circle extending around the central axis and each web section is aligned along the chord.
10 . The planet carrier of claim 9 wherein each riveting device is a flat plate component or a stamped part with formed rivet heads.
11 . The planet carrier of claim 9 wherein each carrier shell comprises a common rivet opening for each rivet section or each pair of single rivets.
12 . The planet carrier of claim 9 wherein the planetary wheel sections and the connecting sections of each one of the pair of carrier shells corresponds to the planetary wheel sections and the connecting sections of the other one of the pair of carrier shells.
13 . The planet carrier of claim 12 wherein the pair of carrier shells are constructed identically or symmetrically to one another.
14 . The planet carrier of claim 9 wherein each of the pair of carrier shells comprises exactly four planetary wheel sections and exactly four connecting sections.
15 . A planet carrier comprising: a central axis; a pair of carrier shells, each carrier shell comprising planetary wheel sections and connecting sections, the connecting sections arranged as forming sections recessed relative to the planetary wheel sections; a plurality of planetary wheels, each disposed in a planetary wheel section; and a plurality of riveting devices connecting the carrier shells at the connecting sections, each riveting device: oriented in a circumferential direction around the central axis; formed in one piece from one material; and comprising an H-shape formed from: a web section arranged as a spacer between the carrier shells; and a rivet section comprising a pair of single rivets, each single rivet comprising a rivet head disposed on one of the carrier shells to fix the one of the carrier shells on the web section, wherein each carrier shell comprises a common rivet opening for each rivet section or each pair of single rivets.
16 . The planet carrier of claim 15 wherein each riveting device is a flat plate component or a stamped part with formed rivet heads.
17 . The planet carrier of claim 15 wherein the planetary wheel sections and the connecting sections of each one of the pair of carrier shells corresponds to the planetary wheel sections and the connecting sections of the other one of the pair of carrier shells.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is the United States National Phase of PCT Appln. No. PCT/DE2022/100309 filed Apr. 25, 2022, which claims priority to German Application No. DE102021112939.7 filed May 19, 2021, the entire disclosures of which are incorporated by reference herein. TECHNICAL FIELD The present disclosure relates to a planet carrier, a planetary drive for a vehicle with the planet carrier and a set consisting of a plurality of such planet carriers. BACKGROUND Planetary gears are often used in the drive train of vehicles to translate, reduce, distribute or combine drive torque. Such planetary gears often have a planet carrier, which forms a rotatable base for a plurality of planetary wheels, which are rotatably arranged in a pitch circle diameter about an axis of rotation of the planet carrier. The planetary wheels mesh, for example, with a ring gear and/or with a sun gear. The publication DE 10 2019 106 947 A1 discloses a planet carrier with a first cheek, a second cheek and with at least one connecting web in which the first cheek and the second cheek are connected to one another via the connecting web and are held axially separated from one another by means of the connecting web at a distance. The connecting web has at least one axially aligned first pin, the pin is axially aligned with a central axis of the planet carrier, and the first pin sits in an axially aligned first hole recessed on a radially outer edge of the first cheek. The connecting web is connected to the first cheek via the first pin seated in the first hole, and the first hole is opened towards the edge in such a way that a section of the first pin seated in the hole is exposed on the respective edge in the radial direction. The publication DE 10 2016 219 949 A1 discloses a planet carrier of a planetary gear, including two axially spaced carrier cheeks made of sheet metal, which are connected via a connecting web which engages and is positively locked at least in aligned openings of the carrier cheeks. At the distal ends of the connecting web, a folded section is present in each case and rests obliquely to the longitudinal axis through the connecting web on the respective carrier cheek. The carrier web is formed from two individual sheets and is aligned in the radial direction to an axis of rotation of the planet carrier. The publication DE 10 2017 114 452 A1 discloses a planet carrier for a motor vehicle transmission for the rotatable mounting of several planetary wheels which are intended to mesh with a sun gear, with a first partial planet carrier and a second partial planet carrier for housing the planetary wheels being firmly connected to one another. The first partial planet carrier has a tab which protrudes as an anti-rotation device through a window of the second partial planet carrier, the tab being aligned parallel to the material of the second partial planet carrier surrounding the window and resting against this material. In addition, the partial planet carriers are connected to each other via single rivets. From the document DE 10 2011 006 285 A1, a planet carrier is known which has two half-shells, the half-shells showing recesses and the two half-shells in the area of the recesses each being directly connected to one another via two separate connecting rivets. The planet carrier formed from this has the advantage that it has a high structural rigidity. SUMMARY The present disclosure provides a planet carrier which is designed to be suitable for production even in a large number of variants. The present disclosure relates to a planet carrier which is in particular suitable and/or formed for a vehicle. The planet carrier may form a torque-transmitting component in a drive train of the vehicle. The vehicle and/or the drive train can be based on an internal combustion engine and/or based on an electric motor and thus be designed as an electric vehicle, a hybrid vehicle or as an internal combustion engine vehicle. The planet carrier defines a central axis, e.g., the planet carrier rotates around the central axis during operation. The planet carrier has two carrier shells, the carrier shells being arranged axially offset in relation to the central axis and parallel to one another. The carrier shells each have planetary wheel sections and connecting sections. In an example embodiment, the planetary wheel sections and the connecting sections alternate in the circumferential direction around the central axis on the respective carrier shell. The planet carrier has a plurality of planetary wheels, the planetary wheels being arranged in the planetary wheel sections. Exactly one planetary wheel can be arranged in a planetary wheel section: alternatively, two planetary wheels are arranged in the planetary wheel section, which, for example, mesh with one another. The planetary wheels may be mounted via bolts, the bolts being fixed in the carrier shells in the respective planetary wheel section. In an e