Tilting device

Abstract

The cleaning device includes a base, an indexed table, a driving mechanism and a power transmission mechanism. The driving mechanism includes a driving device including a drive shaft and a first engaging member. The drive shaft rotates around a first axis. The first engaging member is disposed on the first axis to rotate integrally with the drive shaft. The power transmission mechanism includes a second engaging member, a propeller shaft, a piston, and a reduction gear.

What is claimed is: 
     
         1 . A cleaning device for cleaning an object, comprising:
 a base; and   a index table as moving body being disposed at the base,   the index table disposed at the base is turnable around a pivot shaft :and   a driving mechanism that includes:   a driving device including a drive shaft configured to rotate around a first axis; and   a first engaging member disposed on the first axis to rotate integrally with the drive shaft; and   
       a power transmission mechanism that includes:
 a second engaging member disposed on the first axis engageable with/disengageable from the first engaging member; 
 a propeller shaft disposed on the first axis, one end side of the propeller shaft being inserted into the second engaging member to be rotatable integrally with the second engaging member around the first axis; 
 a piston that reciprocates the second engaging member between a first position and a second position along a direction of the first axis; and 
 a reduction gear joined to the other end side of the propeller shaft to decelerate the rotation of the propeller shaft, the reduction gear causing an output shaft joined to the object to rotate around a second axis, wherein: 
 
       the propeller shaft includes a spline shaft, 
       the second engaging member has a spline hole meshing with the spline shaft, 
       while the second engaging member is at the first position by an operation of the piston, the first engaging member separates from the second engaging member, and 
       while the second engaging member is at the second position by the operation of the piston, the first engaging member engages the second engaging member and the spline shaft meshes with the spline hole to rotate the first engaging member, the second engaging member, and the propeller shaft integrally with the drive shaft. 
     
     
         2 . The cleaning device according to  claim 1 , wherein:
 the reduction gear includes an oil tank and a plurality of gears, the oil tank accumulating lubricating oil, the plurality of gears joining the other end side of the propeller shaft passing through the oil tank and the output shaft together,   the propeller shaft internally includes an oil passage, the oil passage extending along the direction of the first axis, the oil passage having an inlet and an outlet, the inlet communicating with the oil tank, the outlet opening to the spline shaft or nearby the spline shaft, and   the lubricating oil accumulated in the oil tank flows through the oil passage to lubricate a surface of the spline shaft.   
     
     
         3 . The cleaning device according to  claim 2 , further comprising
 a casing that internally houses the propeller shaft to which the second engaging member is mounted, the casing rotatably supporting the second engaging member and the propeller shaft around the first axis, and   an air passage extending along the direction of the first axis, the air passage having an inlet and an outlet, the inlet communicating with a first space, the first space being formed upper than an oil surface of the lubricating oil in the oil tank, the outlet communicating with a second space, the second space being formed between the propeller shaft and the casing, wherein:   the oil tank has an air supply port to supply purge air from an air supply source, and   the purge air supplied to the first space passes through the air passage and the second space and is discharged from between the second engaging member and the casing.   
     
     
         4 . The cleaning device according to  claim 3 , wherein:
 the piston has a first sliding surface and a second sliding surface, the first sliding surface being formed in the direction along the first axis, the second sliding surface being parallel to the first sliding surface,   the casing has a first support surface and a second support surface, the first support surface sliding with respect to the first sliding surface, the second support surface sliding with respect to the second sliding surface, and   the first support surface guides the first sliding surface and the second support surface guides the second sliding surface to reciprocate the piston along the direction of the first axis.   
     
     
         5 . The cleaning device according to  claim 4 , wherein:
 the piston has a hollow cylindrical shape disposed on the first axis and internally including the second engaging member, the piston including a trunk portion and a flange portion, the trunk portion abutting on the second engaging member to move the second engaging member along the direction of the first axis, the flange portion projecting outward from the trunk portion,   the first sliding surface is formed on an outer peripheral side surface of the trunk portion,   the second sliding surface is formed on an inner peripheral side surface of the flange portion, and   the casing includes a cylindrical first guide member and a cylindrical second guide member, the first support surface being formed at the first guide member, the second support surface being formed at the second guide member.   
     
     
         6 . The cleaning device according to  claim 2 , wherein:
 the second axis is disposed in a direction perpendicular to the first axis, and   the plurality of gears include a first bevel gear and a second bevel gear, the first bevel gear meshing with an end on the other end side of the propeller shaft, the second bevel gear meshing with the first bevel gear.   
     
     
         7 . The cleaning device according to  claim 1 , wherein
 the first axis and the second axis are coaxially disposed.