Patent ID: 9132499
Filing Date: 2015-09-15
Classification: B23K,B23Q,F16C,F16H,Y10T

Abstract:
1. A tractor unit mounting mechanism, comprising: a clamping assembly, the clamping assembly configured to engage and disengage a tractor unit to a guide track comprising a first rail and a second rail; and at least one pivot block set comprising a first pivot block and a second pivot block, each of the first pivot block and the second pivot block comprising a first rolling device and a second rolling device, wherein the first rolling devices are disposed on an inner portion of the respective pivot blocks and the second rolling devices are disposed on an outer portion of the respective pivot blocks with respect to the tractor unit, wherein the at least one pivot block set is disposed on the tractor unit such that the first pivot block and the second pivot block are on opposite sides of the guide track when the tractor unit is mounted on the guide track, wherein, when the tractor unit is in a disengaged position, a first distance between an outer portion of the first rail and an outer portion of the second rail is greater than a second distance between the first rolling devices of the at least one pivot block set, and wherein the first distance is less than a third distance between the second rolling devices of the at least one pivot block set.