# US 2020/0399853 A1 · Quick-Change Device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0399853 A1 - Document ID: US20200399853A1 - Status: Published application - Kind: A1 - Application number: 17/010,908 - Filed: 2020-09-03 - Published: 2020-12-24 - Earliest claimed: 2018-03-06 - Assignees: OilQuick Deutschland KG - Applicants: OilQuick Deutschland GmbH - Inventors: Florian FÄLSCHLE - Web page: https://patentgrep.com/patent/US20200399853A1 ## CPC - E02F 3/3622: {with a hook and a locking element acting on a pin} - E02F 3/3663: {hydraulically-operated} - E02F 3/3627: {with a hook and a longitudinal locking element} - E02F 3/365: {with redundant latching means, e.g. for safety purposes} - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) ## Abstract A quick-change device for changing attachments on a construction machine includes a support, first receptacles arranged on one side of the support for receiving a first coupling element, second receptacles arranged on the other side of the support for receiving a second coupling element, and a capturing device arranged on the support for capturing the attachment. In order to avoid damage to the support caused by improper strain on the capturing device, the capturing device has at least one capturing hook pivotably arranged on the support. ## Claims ### Claim 1 A quick-change device for changing attachments on a construction machine, the device comprising a support, first receptacles arranged on one side of the support for receiving a first coupling element, second receptacles arranged on the other side of the support for receiving a second coupling element, a locking device for detachably holding the second coupling element in place and a capturing device arranged on the support for capturing the attachment, wherein the locking device has bolt-shaped locking elements which are moveable between a retracted released position and an extended locking position, and wherein the capturing device has at least one capturing hook pivotably arranged on the support to prevent the attachment from falling down as a result of an operator error or malfunctions caused by an unintentional movement of the locking elements into the released position. ### Claim 2 (depends on 1) The quick-change device of claim 1, wherein the at least one capturing hook comprises two capturing hooks pivotably arranged on the first receptacles of the support. ### Claim 3 (depends on 1) The quick-change device of claim 1, wherein the at least one capturing hook is arranged on a bridge-like joining member of the support so as to be pivotable about a transverse shaft. ### Claim 4 (depends on 3) The quick-change device of claim 3, wherein the bridge-like joining member has a transverse bore and wherein the at least one capturing hook has receiving bores for receiving the transverse shaft. ### Claim 5 (depends on 3) The quick-change device of claim 3, wherein the at least one capturing hook is pivotably mounted on the transverse shaft by bearing sleeves. ### Claim 6 (depends on 3) The quick-change device of claim 3, wherein the transverse shaft is secured relative to the support by a pin to prevent the transverse shaft from falling out and twisting. ### Claim 7 (depends on 3) The quick-change device of claim 3, wherein the bridge-like joining member protrudes into an intermediate space between two rearwardly protruding legs of the at least one capturing hook. ### Claim 8 (depends on 7) The quick-change device of claim 7, wherein the at least one capturing hook has an upper curvature on ends of the legs facing in a direction of the support and a rearward abutting surface for abutting a front stop surface of the support. ### Claim 9 (depends on 3) The quick-change device of claim 3, wherein the bridge-like joining member protrudes into a recess on a rearward face of the at least one capturing hook, the recess having an upper inner surface and a lower inner surface. ### Claim 10 (depends on 9) The quick-change device of claim 9, wherein an upper and a lower gap are located between the bridge-like joining member and the upper and the lower inner surfaces of the recess. ### Claim 11 (depends on 10) The quick-change device of claim 10, wherein a damping element is inserted into the upper and the lower gaps. ### Claim 12 (depends on 3) The quick-change device of claim 3, wherein the transverse shafts are bearing journals integrally formed in one piece with the capturing hooks, by which the capturing hooks are positioned in half-shell receptacles on the support and held in place from below by a complementary part. ### Claim 13 (depends on 12) The quick-change device of claim 12, wherein the half-shell receptacles for pivotably mounting the transverse shafts are arranged on the top face of two parallel legs spaced at a distance from one another on bridge-like joining members of the support. ### Claim 14 (depends on 1) The quick-change device of claim 1, wherein the at least one capturing hook is designed to grasp around a coupling element engaging in the first receptacles.