Mounting earth-working tools on the rotor of a cultivating machine |
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| 申请号 | US3566975D | 申请日 | 1969-02-24 | 公开(公告)号 | US3566975A | 公开(公告)日 | 1971-03-02 |
| 申请人 | ROTARY HOES LTD; | 发明人 | HOWARD ARTHUR CLIFFORD; HOWARD JOHN ARTHUR; | ||||
| 摘要 | An earthworking tool and tool holder and a combination thereof are for use with a rotor of a cultivating machine, and the tool and tool holder are provided with a quick release securing mechanism including a root element on the tool or the tool holder which engages between corresponding wedging surfaces on the tool holder or tool respectively. The mechanism is such that during operation movement of the tool in its working direction tends to increase the wedging engagement between the tool and holder. | ||||||
| 权利要求 | 1. A rotary cultivator earthworking tool and toolholder combination in which the toolholder includes a flange radially directed with respect to the axis of a rotor shaft of the rotary cultivator, a portion of the toolholder defining part of a wedging mechanism having wedging surfaces which are directed transversely to an end face of the flange which face extends at a right angle to the axis of the rotor shaft, a portion of the tool defining another part of the wedging mechanism and having wedging surfaces engaging with the wedging surfaces on the toolholder, one of said portions being a root element having its wedging surfaces wedgingly engaged between the wedging surfaces on the other of said portions, and the wedging surfaces on each of said portions being directed and arranged such that during movement of the combination in the operative direction of the tool the wedging engagement between the tool and toolholder tends to increase. 2. The combination as claimed in claim 1 wherein the wedging surfaces on the said portions are in the form of a dovetail connection. 3. The combination as claimed in claim 1 wherein the wedging surfaces on said other of said portions are formed as the sides of a channel. 4. The combination as claimed in claim 1 wherein the root element is formed as a flat loop having a turned-over portion in contact with the remainder of the loop. 5. The combination as claimed in claim 4 wherein a bight of the flat loop forms a cavity and the bight has a greater thickness than the remainder of the loop in the direction transversely of the loop. 6. The combination as claimed in claim 1 wherein the toolholder includes two flanges directed radially of the rotor shaft, the flanges being coaxial and closely adjacent and defining wedging surfaces between which the root element is engaged. 7. The combination as claimed in Claim 1 wherein the earthworking tool has a flat shank extending in a plane parallel to the toolholder flange. |
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