Patent ID: 7461996
Filing Date: 2008-12-09
Classification: F16B,F16D,Y10T

Abstract:
1. An erroneous assembling preventing tool for use with a universal joint having a yoke main body comprising a cylindrical section forming a slit axially extending and first and second tabs that are opposed to each other with the slit sandwiched therebetween, and a fixing member for fixing to the cylindrical section a shaft inserted into the cylindrical section in an axial direction of the cylindrical section by bringing the first and second tabs near to each other, the fixing member comprising a bolt screwed into a screw hole of the second tab through a bolt insertion hole of the first tab, for preventing the shaft from being fixed to the cylindrical section by fastening the bolt in a state where the shaft is not inserted into a normal position of the axial direction of the cylindrical section, the erroneous assembling preventing tool comprising: a fixing section fixed to the yoke main body; a prevention section arranged between the first and second tabs; and a driving section for driving the prevention section, wherein the prevention section is displaceable to a prevention position at which the bolt is prevented from being inserted through the screw hole by being abutted on an end of the bolt and a prevention release position at which the prevention position is released, and wherein the driving section displaces the prevention section to the prevention release position when the driving section is pressed by an end of the shaft inserted into the normal position of the axial direction of the cylindrical section, and wherein the fixing section, the prevention section, and the driving section are integrally formed of a single steel plate having elasticity for elastically urging the prevention section to the prevention position, and the erroneous assembling preventing tool further comprising: a first plate at least a part of which is along an outer side surface of the first tab; a second plate at least a part of which is arranged in the slit; and a connection section for connecting the first plate and the second plate, wherein the second plate is provided with the prevention section and the driving section, and wherein the second plate comprises an edge inclined in the axial direction of the cylindrical section, and the driving section is provided at the edge of the second plate, and the erroneous assembling preventing tool further comprising: a projection folded from the edge of the second plate, wherein the projection is inserted into the screw hole of the second tab when the prevention section at the prevention position is pressed on an inner side surface of the second tab by the edge of the bolt.