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1. 发明授权

US5542477A Front lifting device for agricultural tractor or the like 失效
标题翻译：用于农用拖拉机的前提升装置等
公开(公告)号：US5542477A
公开(公告)日：1996-08-06
申请号：US295862
申请日：1994-09-07
申请人： Hubert DeFrancq
发明人： Hubert DeFrancq
IPC分类号： A01B59/048 , B62D49/08 , A01B59/06
CPC分类号： A01B59/048 , B62D49/085
摘要： Lifting device (D) comprising a frame (4) for fixing to a tractor chassis, the frame being fitted, on its lower part, with lower securing member (A), articulated about a transverse axis and extending towards the front, with its ends capable of being coupled to the two lower fastening points of a tool, and on its higher part, with a median upper securing members (16); lifting members (14) are provided between the frame (4) and lower securing members. The lower securing members (A) comprise, firstly, a lower primary structure (19), articulated at its rear part on a transverse axis (18) carried by the frame (4), and provided on the front with two longitudinal lateral extensions (21) in which a transverse bearing (26) is provided, and secondly, a forearm (29) associated with each longitudinal extension 921) and articulated about an axis (34) carried by the bearing. The forearms are independent; each (29) when in a work position, comes to rest by means of its rear part, under a stop integral with the structure (19), so as to block itself on lifting of the structure or on load raising. When the forearm (29) is free of its load, it can be folded upwards in relation to the frame (4), for a storage position. The forearm is provided, in a high position of the frame (19), with a stationary locking device to prevent both the structure and forearms from dropping, and to prevent the latter from rotating in relation to said structure.
摘要翻译： PCT No.PCT / FR93 / 00228 Sec。 371日期：1994年9月7日 102（e）1994年9月7日PCT PCT 1993年3月9日PCT公布。第WO93 / 17542号公报日期1993年9月16日包括用于固定到拖拉机底盘的框架（4）的装置（D），框架在其下部装配有下固定构件（A），其围绕横向轴线铰接并朝向前端，其端部能够联接到工具的两个下部紧固点，并且在其较高部分上具有中间上部固定构件（16）; 提升构件（14）设置在框架（4）和下固定构件之间。下固定构件（A）首先包括下部主结构（19），其在由框架（4）承载的横向轴线（18）上的后部铰接，并且在前部设置有两个纵向侧向延伸部 21），其中设置有横向轴承（26），其次设置有与每个纵向延伸部分921相关联的前臂（29））并围绕轴承承载的轴线（34）铰接。前臂是独立的每个（29）在工作位置时，通过其后部在与结构（19）一体的止动件下休息，以便在结构提升或加载时阻挡自身。当前臂（29）没有其负载时，它可以相对于框架（4）向上折叠，用于存放位置。前臂在框架（19）的高位置处设置有固定的锁定装置，以防止结构和前臂的下落，并且防止后者相对于所述结构旋转。

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