Grapple assembly
阅读：906发布：2023-03-06
专利汇可以提供Grapple assembly专利检索，专利查询，专利分析的服务。并且A grapple assembly arranged to be suspended from a boom, for example on a vehicle to load logs in the forest. A grapple assembly having grapple jaws or buckets and forming a compact slender unit not prone to become obstructed or damaged by surrounding obstacles, positively pivoted around an upright axis and having jaws which can pivot unequally when one is offered a larger resistance than the other upon grappling. A grapple assembly having two grapples pivotally supported by a pivoted linkage arrangement allowing the unequal pivoting thereof, a hydraulic actuator for the grapples and a direction changing drive to pivot the grapples and the actuator about an upright axis.，下面是Grapple assembly专利的具体信息内容。
1. A grapple assembly comprising, in combination, a mounting structure, a first and a second grapple elements, a linkage arrangement including a first pivot pivotally suspending said grapple elements from said mounting structure about a first axis, and a pair of second and third pivots pivotally suspending said grapple elements to said linkage arrangement about spaced parallel transverse axes extending longitudinally of said first axis and allowing unequal pivoting of said grapple elements, actuating link means pivotally connected at spaced-apart points thereof to said first and said second grapple elements, said spaced-apart points being laterally spaced from said second and third axes respectively, power means operatively engaging said mounting structure, and a fourth pivot pivotally connecting said power means to said actuating link means about a fourth axis extending longitudinally of said second and third axes, whereby said power means operatively produces displacement of said link means towards and away from said mounting structure and causes equal and unequal pivoting of said first and said second grapple elements.
2. A grapple assembly as defined in claim 1, wherein said linkage arrangement includes lever arms pivotally connected to said mounting structure by said first pivot, and to said grapple elements by said secoNd and third pivots respectively.
3. A grapple assembly as defined in claim 2, wherein said lever arms include one set of a first and a second lever arms, said first and said second grapple elements form a first and a second elongated jaws each having one inner end portion and an outer end portion, said inner end portions are pivoted onto said first and said second lever arms respectively about said second and third axes, the latter are spaced from said first axis away from said mounting structure, and said actuating link means is pivoted to said elongated grapple jaws intermediate said second and third axes and said outer end portions respectively.
4. A grapple assembly as defined in claim 3, wherein said first and said second jaws laterally extend lengthwise of said second and third pivoting axes thereof, said lever arms include another set of a first and a second lever arms pivotally connected to said one inner end portions respectively and to said mounting structure, said one and said another sets of lever arms are positioned on opposite sides of said jaws respectively and said actuating link means includes an actuating link on each of said opposite sides of said jaws and similarly pivotally connected to the latter in spaced-apart relationship to each other.
5. A grapple assembly as defined in claim 4, further including a universal joint structure secured to said actuating links intermediate the same, said universal joint structure has a first pivot means including said fourth pivot operatively connected to said actuating links, and a second pivot means operatively connected to said power means, said first and said second pivot means are constructed and arranged to allow universal pivoting of said actuating links relative to said power means and said mounting structure.
6. A grapple assembly as defined in claim 5, wherein said power means includes an hydraulic cylinder unit constructed and arranged to displace said universal joint structure and said actuating links towards and away from said mounting structure, whereby to cause pivoting of said jaws towards and away from each other.
7. A grapple assembly as defined in claim 6, further including a direction controlling drive means connected to said mounting structure and constructed and arranged to rotate the latter about an upright axis extending transversely relative to said first, second, third, and fourth axes, a suspending device fixed to said direction controlling drive means and arranged to suspend the grapple assembly from a handling structure therefor, said suspending device, said direction controlling drive means, said mounting structure and said hydraulic cylinder unit are serially connected one to another longitudinally of said upright axis into a compact and slender arrangement operatively standing within the lateral outline of said grapple jaws.
8. A grapple assembly as defined in claim 7, wherein said hydraulic cylinder unit constitutes an hydraulic cylinder coaxially arranged with said upright axis for contraction and extension along the latter.
9. A grapple assembly as defined in claim 7, wherein said direction controlling drive means constitutes an hydraulic motor having a housing connected to said suspending device and arranged to be non-rotatably suspended by the latter, and a rotor coaxially retained into said housing relative to said upright axis and fixed to said mounting structure to cause the rotation of the latter about said upright axis.
10. A grapple assembly as defined in claim 5, wherein said universal joint structure includes a frame pivotally carried by both said first and second pivot means, abutment means is fixed to said mounting structure and extend therefrom towards said frame on opposite sides of said hydraulic cylinder unit and is constructed and arranged to urge said jaws into equally open position upon contraction of said hydraulic cylinder unit.
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