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The objective of the article is to present a design and optimisation of a quick clamping device for changing peripheral attachments, which is intended to be mounted on a skid-steer loader Locust produced in the Slovak Republic. It is the only producer of skid-steer loaders in the Slovak Republic, which parameters, such as operating weight, tipping load, breakout force, engine power, hydraulic flow, travel speed etc. compete with world producers. In this article, the design, drive-train and control system of the skid-steer loader are described, as well as the presentation of a current state of the quick clamping device is introduced, which is modified and optimised based on the producer requirements. The modification of the quick clamping device is necessary due to the simultaneous manual actuating of the attachments locking. A loader operator has to get in the loader cabin, to hang up an attachment on the quick clamping device, then to get off the cabin and manually lock the attachment by means of a lever system. After this process he can get in the cabin and use the loader. The modification of the quick clamping device will allow to lock the peripheral attachments directly from the loader cabin. It will improve comfort of an operator, while guaranteeing safety of the loader operation. The most important objectives of the presented technical solution were to meet all producer’s requirements together with the best functionality, in order to implement the designed solution to the current manufacturing process of the company. The numerical analysis of the quick clamping device design is included in the article. The boundary conditions needed to the numerical calculation have been determined based on maximal load capacity of used hydraulic cylinders ensuring proper kinematics of the mechanism.

Design of quick clamping device of peripheral attachments for skid-steer loader