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EP-4737753-A1 - ASSEMBLY SET FOR ASSEMBLING A COUPLING DEVICE

EP4737753A1EP 4737753 A1EP4737753 A1EP 4737753A1EP-4737753-A1

Abstract

The present disclosure relates to an assembly set (3) for assembling a coupling device (1) for providing an axial coupling between a first portion (5) and a second portion (2) that are arrangeable coaxially along an axial axis. The assembly set (3) comprises the first portion (5), a retaining element (10) and a mounting device (12). The first portion (5) comprises a recess (8) configured to receive the retaining element (10) and at least one notch (16). The mounting device (12) comprises at least one engagement finger (14) for pressing the retaining element into the recess (8). The notch (16) extends towards the recess (8) for guiding the engagement finger (14) onto the retaining element (10) when the mounting device (12) is moved towards the first portion (5) along the axial axis during the assembly of the coupling device (1).

Inventors

  • Dacej, Milan
  • Dötschel, Philip

Assignees

  • ZF Friedrichshafen AG

Dates

Publication Date
20260506
Application Date
20241029

Claims (11)

  1. An assembly set (3) for assembling a coupling device (1) for providing an axial coupling between a first portion (5) and a second portion (2) that are arrangeable coaxially along an axial axis, the assembly set (3) comprising the first portion (5), a retaining element (10) and a mounting device (12), wherein the first portion (5) comprises a recess (8) configured to receive the retaining element (10) and at least one notch (16), wherein the mounting device (12) comprises at least one engagement finger (14) for pressing the retaining element (10) into the recess (8), and wherein the notch (16) extends towards the recess (8) for guiding the engagement finger (14) onto the retaining element (10) when the mounting device (12) is moved towards the first portion (5) along the axial axis during the assembly of the coupling device (1).
  2. The assembly set (3) according to claim 1, characterized in that the recess (8) comprises a groove (8) configured to receive the retaining element (10), and wherein the retaining element (10) comprises a retaining ring (10).
  3. The assembly set (3) according to claim 1 or 2, characterized in that the first portion (5) forms an envelope surface radially delimiting the first portion (5), and in that the first portion (5) and the mounting device (12) are matched to each other such that the engagement finger (14) does not radially extend beyond the envelope surface when placed in the notch (16) and pressing the retaining element (10) into the recess (8).
  4. The assembly set (3) according to one of the preceding claims, characterized in that the first portion (5) comprises a first set of teeth (24) configured to mesh with a corresponding second set of teeth of the second element (2) to provide a circumferential coupling for transmitting a torque for driving a vehicle.
  5. The assembly set (3) according to claim 4, characterized in that the notch (16) comprises a gap (16) in the first set of teeth (24).
  6. The assembly set (3) according to one of the previous claims, characterized in that the mounting device (12) comprises a plurality of engagement fingers (14) arranged equidistantly about a central axis.
  7. The assembly set (3) according to one of the preceding claims, characterized in that the assembly set (3) comprises an output shaft (4) configured to transmit a torque and configured to be axially coupled with a planet carrier (26), the output shaft (4) forming the first portion (5).
  8. A planetary gearset (32) assembled with an assembly set (3) according to claim 7, the planetary gearset (32) comprising a first output shaft (4) for driving a first wheel, a second output shaft (52) for driving a second wheel and an input shaft (54) for providing a torque of an engine (34), the planetary gearset (32) being configured to distribute the torque from the input shaft (54) to the two output shafts (4, 52) for driving the first and second wheels, wherein one of the output shafts (4; 52) forms the first portion (5) and is axially coupled to the planet carrier (26) forming the second portion.
  9. The planetary gearset (32) according to claim 8, characterized in that the planetary gearset (32) comprises a first planetary gearset (38) and a second planetary gearset (46), the first planetary gearset (38) comprising a first element (28), a second element (26) and a third element (36) and the second planetary gearset (46) comprising a first element (40), a second element (44) and a third element (50), wherein the first element (28) of the first planetary gearset (38) is rotationally coupled to the input shaft (54), the second element (26) of the first planetary gearset (38) is rotationally coupled to the first output shaft (4), the third element (36) of the first planetary gear set (38) is rotationally coupled to the first element (40) of the second planetary gearset (46), the second element (44) of the second planetary gearset (46) is non-rotatably fixed to a stationary component (42), and the third element (50) of the second planetary gearset (46) is rotationally coupled to the second output shaft (52).
  10. Vehicle comprising a planetary gearset (32) according to claim 8 or 9.
  11. A method for assembling a coupling device (1) with an assembly set (3) according to one of the claims 1 to 7 or one of the planetary gearsets (32) of claims 8 or 9, comprising the steps of arranging (I) the retaining element (10) in the recess (8) of the first portion (5), engaging (II) the retaining element (10) with the mounting device (12) by reaching through the notch (16) of the first portion (5) with the engagement finger (14) of the mounting device (12), positioning (III) the first portion (5) and the second portion (2) coaxially to one another, and disengaging (IV) the mounting device (12) from the retaining element (10) for establishing the axial coupling between the first portion (5) and the second portion (2).

Description

Technical Field The present disclosure relates to an assembly set for assembling a coupling device, as well as a planetary gearset assembled using such an assembly set, and a method for assembling said coupling device or said planetary gearset. Prior art Various tools and components are known in the art for assembling two elements together such that they are axially coupled. Description of the invention In a first aspect, the present disclosure relates to an assembly set for assembling a coupling device for providing an axial coupling between a first portion and a second portion that are arrangeable coaxially along an axial axis. The assembly set may comprise a collection of elements or components for assembling the coupling device. An axial coupling may comprise a coupling along an axial direction, for example a connection between the first portion and the second portion that prevents a relative movement along said axial direction. The axial direction may coincide with the axial axis, which may coincide with a central axis of the first portion and additionally or alternatively of the second portion. An axial coupling may provide a degree of axial play between the two portions or may not provide any play. The first and second portions may be parts of larger elements or structures, or may be individual elements. The first and second portions may be substantially rotationally symmetric along their central axes, and additionally or alternatively be substantially cylindrical. One of the portions may be arrangeable around the other. For example, the first portion may be concentrically arrangeable within the second portion. In some embodiments, the first portion may be formed by a shaft and the second portion may comprise a bore, wherein the shaft is arrangeable within the bore. Alternatively, the first portion may be arrangeable around the second portion. The assembly set comprises the first portion, a retaining element and a mounting device, wherein the first portion comprises a recess configured to receive the retaining element. The recess may be an arranged on a surface of the first portion. For example, it may comprise a circumferential recess spanning a circumference of the first portion. In particular, it may be a recess that spans an entire surface of the shaft. The recess may be arranged towards an axial end of the first portion, for example between a main portion and a thinner end portion of the first portion. It may be radially wider or narrower than the surrounding portions of the first portion. The recess on the first portion may correspond to a recess on the second portion, for example be arrangeable concentrically to said recess of the second portion. The retaining element may be configured to be arranged within the recess of the first portion. It may be an element configured to provide the axial coupling between the first portion and the second portion. The retaining element may be a retaining ring, for example a snap ring or a circlip, a key, or another mechanical element configured to provide an axial coupling. The retaining element may be configured to engage the second portion to provide the axial coupling, for example by reaching into a recess of the second portion. The recess may comprise a depth such that the retaining ring extends over a rim of the recess in a relaxed state, for example reaching into the recess of the second portion if the second portion is positioned around the first portion. The first portion further comprises at least one notch. The notch may be arranged at an axial end of the first portion, for example along a frontal surface of the shaft. The notch may be arranged along a circumference of the first portion, for example along the circumference of the shaft. The notch may extend in the direction of the axial axis. The mounting device comprises at least one engagement finger for pressing the retaining element into the recess. The mounting device may be configured to enable an assembly of the coupling device by engaging the retaining element during the assembly. The engagement finger may form an axial projection from a main body of the mounting device. The engagement finger may be configured to impart a force perpendicular to the axial axis onto the retaining element when pressing it into the recess. The engagement finger may be configured to compress or expand the retaining element when pressing it into the recess. The mounting device may be substantially rotationally symmetric and additionally or alternatively may comprise a cylindrical shape. The mounting device may be releasably attachable to the first portion. The shaft may comprise a protrusion, such as a shaft protrusion, that extends axially from the first portion. The protrusion may be configured to engage with a mounting hole of the mounting device to guide the mounting device onto the first portion to engage with the retaining element when both parts are moved relatively to each other in the direction of the ax