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公开(公告)号：US4165597A
公开(公告)日：1979-08-28
申请号：US756329
申请日：1977-01-03
IPC分类号： A01D34/416 , A01D55/18
CPC分类号： A01D34/4168
摘要： As an article of manufacture, a tapered cutter pin for a rotary mower formed of durable resilient plastic having a shank and terminating at its outer end in a relatively thin but stiffly resilient tip portion, the shank having a head at its inner end for retaining the pin in the disc. With the pin supported cantilever fashion adjacent the head, the bending modulus in the shank is a minimum of 50 in..sup.2 -lb and at the tip is a maximum of 30 in..sup.2 -lb and the initial deflection ranges between 0.5 and 3.0 inches of tip deflection per pound of force. In the preferred embodiment the pin has four evenly spaced flutes extending longitudinally over a portion of its length and of a depth approximately proportioned to the thickness of the pin, the flutes defining between them ribs to produce a cruciform cross section.
摘要翻译： 作为制造品，用于旋转割草机的锥形切割销由耐用的弹性塑料形成，其具有柄部并且在其外端处终止于相对薄但刚性地弹性的尖端部分，所述柄部在其内端具有头部，用于保持 插入光盘。 由于与支柱相邻的销支撑悬臂方式，柄部的弯曲模量最小为50英寸2磅，顶端最大为30英寸2磅，初始偏转范围为0.5至3.0英寸 每磅力的尖端偏转。 在优选实施例中，销具有在其长度的一部分上纵向延伸的四个均匀间隔的槽纹，并且其深度与销的厚度成大致成正比，所述槽纹在它们之间限定肋条以产生十字形横截面。
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公开(公告)号：USD250648S
公开(公告)日：1978-12-26
申请号：US736707
申请日：1976-10-29
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公开(公告)号：US4126990A
公开(公告)日：1978-11-28
申请号：US714982
申请日：1976-08-18
IPC分类号： A01D34/416 , A01D55/18
CPC分类号： A01D34/4168 , A01D34/4166
摘要： A cutter disc assembly for a rotary lawn mower in which the disc has a circular central portion and a peripheral portion with a shallow vertical wall in between. Radial openings are provided in the wall in register with radial grooves formed in the underside of the peripheral portion. A plastic pin is in register with each opening, with the shank of the pin occupying the associated groove and with a stiffly resilient tip portion projecting beyond the periphery of the disc into cutting engagement with the grass. Each groove has a curved rear wall against which the pin bends as the projecting tip of the pin strikes an obstruction as well as a curved front wall against which the pin bends upon rebound, the curved walls being of outwardly flaring shape thereby to support the shank of the pin substantially free of concentrated stress. Each groove has, in addition, a bridge or "ceiling" which serves as a guide surface to hold the pin in a downwardly-angled working position and to provide frictional damping. Protection of tip portion of the pin in its bent state is offered by a ledge or radial extension on the disc either above or below the pin and which "wipes by" the obstruction, shielding the pin from abrading action. Upwardly swept radial vanes are provided above the periphery of the disc to generate air currents which agitate the grass as it is being cut and to provide a stream of air to move the clippings through the discharge chute.
摘要翻译： 一种用于旋转割草机的切割盘组件，其中盘具有圆形中心部分和在其间具有浅垂直壁的周边部分。 径向开口设置在壁上，与形成在周边部分的下侧中的径向凹槽对准。 塑料销与每个开口对准，销的柄占据相关联的槽，并且具有突出超过盘的周边的刚性弹性的尖端部分与草切割接合。 每个凹槽具有弯曲的后壁，当销的突出尖端撞击障碍物时，销弯曲，并且弯曲的前壁在弯曲的情况下弯曲，弯曲的壁呈向外扩张的形状，从而支撑柄 的销基本上没有集中的应力。 此外，每个凹槽还具有用作引导表面的桥或“天花板”，以将销保持在向下的工作位置并提供摩擦阻尼。 在其弯曲状态下保护销的尖端部分由在销上方或下方的盘上的凸缘或径向延伸部提供，并且通过“擦拭”障碍物，从而遮蔽销的磨损作用。 向上扫掠的径向叶片设置在盘的周边上方，以产生气流，其在被切割时搅动草，并提供空气流以将夹子移动通过排出槽。
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公开(公告)号：US4065913A
公开(公告)日：1978-01-03
申请号：US766377
申请日：1977-02-07
IPC分类号： A01D34/416 , A01D55/18
CPC分类号： A01D34/4168 , A01D34/4166
摘要： A safe cutter disc assembly for a rotary lawn mower in which the disc has a circular central portion and an annular outer portion joined by a shallow vertically extending wall having a plurality of radially extending openings. The cutting elements are in the form of cutter pins inserted in the openings, each pin in the preferred embodiment being formed of durable plastic having a head, a relatively stiff shank and a long tapering flexible tip portion, the pins being supported cantilever fashion with respect to the openings. The annular outer portion of the disc closely underlies and protects the relatively stiff shank portions of the pins while the tips of the pins project beyond the periphery of the disc into engagement with the grass, bending back into the projection of the outer portion of the disc upon striking of an obstruction. Adjacent each of the openings is provided a backstop in the form of an upstanding radial vane having a retreating curvature for engaging and providing lengthwise-distributed support for the associated pin during its backward bend. In an alternate version a pin having shank and tip portions of substantially equal diameter is used.
摘要翻译： 一种用于旋转割草机的安全刀盘组件，其中盘具有圆形中心部分和通过具有多个径向延伸开口的浅垂直延伸壁连接的环形外部部分。 切割元件是插入在开口中的切割销的形式，在优选实施例中，每个销由耐用的塑料形成，该塑料具有头部，相对刚性的柄部和长的锥形柔性末端部分，销钉相对于 到开口。 盘的环形外部部分紧密地保持在底部并且保护销的相对刚性的柄部分，同时销的尖端突出超过盘的周边，与草相接合，弯曲回到盘的外部的突出部 一旦发生阻塞。 在每个开口附近设置有直立的径向叶片形式的止回器，该止回器具有退缩曲率，用于在其向后弯曲期间接合并为相关联的销提供纵向分布的支撑。 在替代形式中，使用具有基本相等直径的柄部和尖端部分的销。
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公开(公告)号：USD249150S
公开(公告)日：1978-08-29
申请号：US736846
申请日：1976-10-29
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公开(公告)号：USD245757S
公开(公告)日：1977-09-13
申请号：US710263
申请日：1976-07-30
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