US 12,352,005 B2
Quick-change system for changing attachments on a construction machine
Stefan Schauer, Kissing (DE)
Assigned to OilQuick Deutschland KG, Steindorf (DE)
Filed by OilQuick Deutschland KG, Steindorf (DE)
Filed on Jul. 15, 2021, as Appl. No. 17/376,783.
Claims priority of application No. 10 2020 118 938.9 (DE), filed on Jul. 17, 2020.
Prior Publication US 2022/0018090 A1, Jan. 20, 2022
Int. Cl. E02F 3/36 (2006.01)
CPC E02F 3/3681 (2013.01) [E02F 3/3663 (2013.01); E02F 3/3677 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A quick-change system for changing attachments on a construction machine, the quick-change system comprising:
a quick changer mounted to rotate in a drive housing of a rotary device and rotatable relative to the drive housing by a rotary drive, the quick changer including a support having first receptacles to accommodate a first coupling element, second receptacles to accommodate a second coupling element, and a locking device assigned to the second receptacles, the locking device having at least one locking element movable between an unlocking position and a locking position; and
a rotary joint arranged in the drive housing having a stator and rotor rotatable within the stator to supply a working fluid to the quick changer,
wherein the stator of the rotary joint is arranged within a through-opening of the drive housing and radially supported by an inner bearing ring of the drive housing, a surface of the inner bearing ring extending over a height of a drive wheel of the rotary drive such that the stator is continuously radially supported against the drive housing from above an upper end surface of the drive wheel to beneath the upper end surface of the drive wheel by the surface of the inner bearing ring, and
wherein the stator of the rotary joint includes a hollow cylindrical base element and an annular upper mounting flange having outer shoulders configured for positive-locking engagement in corresponding recesses on an upper cover surface of the drive housing.