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    • 2. 发明授权
    • Braked mechanical joint assembly
    • 制动机械接头总成
    • US6119824A
    • 2000-09-19
    • US87719
    • 1998-05-29
    • Dennis L. McCallum
    • Dennis L. McCallum
    • F16D55/00F16D55/30F16D55/32F16D59/00F16D65/02F16D65/14
    • F16D55/32F16D55/30F16D59/00F16D2055/0058F16D2065/024F16D2125/36
    • A braked mechanical joint assembly is disclosed herein comprising: a) a first brake member; b) a second brake member rotatable relative to the first brake member; c) a friction member positioned between the first and second brake members; (d) means for pushing the first and second brake members together, thereby frictionally engaging them with the friction member so as to oppose relative rotation of the brake members. A resting braking torque is set at the resting position of the joint by initial adjustment of the pushing means.A larger braking torque is produced at other joint positions by providing the joint assembly with a bearing assembly for varying the braking torque with movement of the joint. The bearing assembly may comprise mating bearing grooves or raceways provided on pushing means and at least one of the brake members. The depth of each groove varies over its course, having a deepest segment corresponding to each of several bearings (ball or roller bearings) in the groove. When the joint is in its resting position, a bearing is received in each of these deepest segments, the pushing force exerted by the pushing means is at its minimum (i.e., rest position) value, and the braking torque is at its minimum value. As the joint moves away from its resting position, relative rotation of the grooves of the brake member and pushing means causes the bearings to roll out of the deepest segments of the grooves and into shallower segments of the grooves. As the bearings roll into shallower portions of the groove, the cam action of the bearings in the grooves results in increasing pushing force exerted by the pushing means and therefore increased braking torque. By tailoring the depth profile of the groove as a function of joint position, any desired pushing force/brake torque vs. joint position behavior can be achieved.
    • 本文公开了一种制动的机械接头组件,包括:a)第一制动构件; b)可相对于第一制动构件旋转的第二制动构件; c)位于第一和第二制动部件之间的摩擦件; (d)用于将第一和第二制动构件推到一起的装置,从而与摩擦构件摩擦接合,以抵抗制动构件的相对旋转。 通过推动装置的初始调整,将静止制动力矩设定在关节的静止位置。 通过为接头组件提供一个用于通过接头运动来改变制动转矩的轴承组件,在其它接合位置产生较大的制动力矩。 轴承组件可以包括设置在推动装置和至少一个制动构件上的配合的轴承槽或滚道。 每个槽的深度在其过程中变化,具有对应于槽中的多个轴承(滚珠或滚子轴承)中的每一个的最深部分。 当接头处于其静止位置时,轴承被容纳在这些最深段中的每一个中,由推动装置施加的推力处于其最小(即静止位置)值,并且制动扭矩处于其最小值。 当接头从其静止位置移开时,制动构件和推动装置的槽的相对旋转使得轴承从槽的最深段中滚出并进入凹槽的较浅的段。 当轴承滚动到凹槽的较浅部分时,凹槽中的轴承的凸轮作用导致由推动装置施加的增加的推力并因此增加制动扭矩。 通过根据关节位置调整凹槽的深度轮廓,可以实现任何所需的推力/制动转矩对联合位置的行为。
    • 4. 发明授权
    • Damped mechanical joint assembly
    • 阻尼机械接头总成
    • US06206440B1
    • 2001-03-27
    • US09474330
    • 1999-12-29
    • Dennis L. McCallum
    • Dennis L. McCallum
    • B66C142
    • B66C3/005Y10T403/22
    • A damped mechanical joint assembly comprises two damping members, a joint body positioned therebetween and rotatable relative thereto; and a retainer for maintaining engagement of the damping members with opposite damping surfaces of the joint body. The joint body is provided with a plurality of damping cylinders positioned around the joint rotation axis in a uniformly angularly spaced circular pattern, and each damping cylinder comprises a pair of piston chambers, each opening onto opposite damping surfaces, and a constricted passage connecting the piston chambers. Each of the piston chambers is provided with a piston assembly slidably positioned therein, and each damping cylinder is filled with fluid between the piston assemblies. Each damping member is provided with a circular groove comprising a plurality of uniformly angularly spaced ramped depressions separated by groove barriers. The number of damping cylinders preferably differs from the number of depressions by at least two. The fluid in the damping cylinders urges each piston assembly into engagement with the groove of the corresponding damping member, and the damping members are positioned so that when a piston assembly is located within a ramped depression of the groove of one damping member, the corresponding piston assembly is located at a groove barrier of the groove of the other damping member, thereby resulting in reciprocating motion of the piston assemblies and concomitant flow of the fluid though the constricted passage of the damping cylinders as the joint body rotates relative to the damping members. Viscous resistance to flow of the fluid through the constricted passage as the joint body rotates causes the piston assembly to be urged more strongly into engagement with one of the ramped depressions, thereby producing a damping torque opposing rotation of the joint body, the damping torque increasing with increasing angular velocity of the joint body.
    • 阻尼机械接头组件包括两个阻尼构件,位于其间并可相对于其旋转的接头体; 以及保持器,用于保持阻尼构件与接头本体的相对的阻尼表面的接合。 接头体设置有多个阻尼缸,其以均匀的角度间隔的圆形图案围绕接头旋转轴线定位,并且每个阻尼缸包括一对活塞室,每个活塞室均打开在相对的阻尼表面上,以及连接活塞 房间。 每个活塞室设置有可滑动地定位在其中的活塞组件,并且每个阻尼缸在活塞组件之间填充有流体。 每个阻尼构件设置有圆形凹槽,该圆形凹槽包括由凹槽屏障分开的多个均匀角度间隔开的倾斜凹部。 阻尼缸的数量优选与凹陷的数量不同至少两个。 阻尼缸中的流体促使每个活塞组件与相应的阻尼构件的凹槽接合,并且阻尼构件被定位成使得当活塞组件位于一个阻尼构件的凹槽的倾斜凹部内时,相应的活塞 组件位于另一个阻尼构件的凹槽的凹槽势垒处,由此当接头主体相对于阻尼构件旋转时,活塞组件的往复运动和流体的伴随流动通过阻尼气缸的收缩通道。 随着接头主体的旋转,流体通过收缩通道的流体的粘性阻力使得活塞组件被更强地推动以与斜坡凹陷中的一个接合,从而产生相对于接头本体旋转的阻尼扭矩,阻尼扭矩增加 随着接头体的角速度的增加。