Patent ID: 9228614
Filing Date: 2016-01-05
CPC Classification: F16D

Claim Text:
1. A joint assembly comprising: a first and a second shaft portions, wherein each of the first and second shaft portions has a shaft including a protrusion; a double yoke portion in which a guide hole is formed along an axis direction, the first and the second shaft portions being respectively rotatably connected to both sides of the guide hole with an axis of an upper/lower direction; and a guide portion which is disposed to the guide hole to guide the protrusion and rotates along an inner circumference of the guide hole during rotation of the first and second shaft portions, wherein each of the first and the second shaft portions further comprises: a spider body including a spider hole, a left leg and a right leg which are respectively protruded in a left and a right directions from the spider body, and an upper leg and a lower leg which are respectively protruded in an upward and a downward directions from the spider body to be connected to the double yoke portion; and a yoke block comprising a block body, wherein the yoke block is separately formed from the shaft and is connected to the shaft, wherein the block body has a block hole, which is a through-hole, and the block body is connected to the shaft by the protrusion passing through the block hole and the spider hole, wherein a left connecting member and a right connecting member are respectively protruded from a left side and a right side of the block body and respectively include a connecting hole to which the left leg and the right leg are rotatably connected, and wherein the double yoke portion comprises: a double yoke body including the guide hole; and an upper connecting member and a lower connecting member, which are respectively protruded to both sides of the guide hole from an upper side and a lower side of the double yoke body and respectively include a connecting hole to which the upper leg and the lower leg are rotatably connected, and wherein grooves are respectively disposed on both sides of the guide portion in the guide hole, and wherein the double yoke portion comprises stopper members which are respectively inserted to the respective grooves to fix the position of the guide portion.