Valve Mounting Structure for a Loader Work Vehicle, and a Loader Work Vehicle

Abstract

A front loader 3 is connected to a front portion of a tractor 1 having a tractor body. The front loader 3 includes mounting frames 7 arranged at right and left sides of the tractor body, booms 8 pivotally supported by upper ends of the mounting frames 7 to be vertically swingable, and a working implement 9 swingably connected to distal ends of the booms 8 . A control valve 45 is disposed outside the tractor body 2 and rearwardly of one of the mounting frames 7 for controlling hydraulic cylinders 17, 29.

1 . A structure for attaching a control valve to a loader work vehicle with a front loader connected to a front portion of a tractor having a tractor body, 
 said front loader including mounting frames arranged at right and left sides of said tractor body, booms pivotally supported by upper ends of the mounting frames to be vertically swingable, and a working implement swingably connected to distal ends of the booms,    said control valve being disposed outside said tractor body and rearwardly of one of said mounting frames for controlling hydraulic cylinders.    
   
   
       2 . A structure for attaching a control valve as defined in  claim 1 , comprising a valve stay disposed rearwardly of said one of said mounting frames and projecting laterally outward, said control valve being attached to said valve stay.  
   
   
       3 . A structure for attaching a control valve as defined in  claim 2 , wherein control wires for operating said control valve are passed in a fore and aft direction through and held by said valve stay, said control wires being connected to spools of said control valve.  
   
   
       4 . A structure for attaching a control valve as defined in  claim 3 , wherein a valve cover is provided for covering at least areas laterally outward of and below the control valve, said control wires being provided in a plurality corresponding to the spools of the control valve, the plurality of control wires being arranged at vertical intervals laterally outward of the fuel tank to extend in the fore and aft direction, and arranged laterally inward of a side wall of the valve cover, and passed fore and aft through and held by a laterally outward portion of the valve stay.  
   
   
       5 . A structure for attaching a control valve as defined in  claim 2 , wherein: 
 each of the right and left mounting frames includes a support base projecting laterally outward from the tractor body, a main frame attached to a laterally outward end of the support base to project upward, and a side frame detachably attached to the main frame to project upward, one of the booms being pivotally supported at a proximal end thereof by an upper end of the side frame to be vertically swingable; and    a laterally inward end of said support base is fixed to a connecting frame connected to a front axle frame of said tractor body, said support base projecting laterally outward from the connecting frame, said valve stay projecting laterally outward from a position of the connecting frame rearward of the support base, said control valve being disposed rearwardly of the support base and a lower portion of the main frame.    
   
   
       6 . A structure for attaching a control valve as defined in  claim 1 , wherein: 
 said control valve has a plurality of spools corresponding to the hydraulic cylinders of the front loader;    the plurality of spools being arranged vertically and projecting laterally outward from positions vertically spaced apart of a valve body, said control valve being attached to the valve stay such that a direction of thickness of the control valve coincides with a fore and aft direction.    
   
   
       7 . A loader work vehicle comprising: 
 a tractor having a tractor body; and    a front loader connected to a front portion of the tractor;    said front loader including mounting frames arranged at right and left sides of said tractor body, booms pivotally supported by upper ends of the mounting frames to be vertically swingable, and a working implement swingably connected to distal ends of the booms;    wherein a tank is disposed outside the tractor body and rearwardly of one of the mounting frames, and a control valve is disposed outside said tractor body and rearwardly of said one of said mounting frames for controlling hydraulic cylinders of the front loader.    
   
   
       8 . A loader work vehicle as defined in  claim 7 , further comprising a valve stay disposed between said tank and said one of said mounting frames and projecting laterally outward, said control valve being attached to said valve stay.  
   
   
       9 . A loader work vehicle as defined in  claim 8 , further comprising control wires for operating said control valve, said control wires being passed in a fore and aft direction through and held by said valve stay, and connected to spools of said control valve.  
   
   
       10 . A loader work vehicle as defined in  claim 9 , further comprising a valve cover for covering at least areas laterally outward of and below the control valve, said control wires being provided in a plurality corresponding to the spools of the control valve, the plurality of control wires being arranged at vertical intervals laterally outward of the fuel tank to extend in the fore and aft direction, and arranged laterally inward of a side wall of the valve cover, and passed fore and aft through and held by a laterally outward portion of the valve stay.  
   
   
       11 . A loader work vehicle as defined in  claim 8 , wherein: 
 said tractor body has connecting frames connected to a front axle frame;    each of the right and left mounting frames includes a support base projecting laterally outward from the tractor body, a main frame attached to a laterally outward end of the support base to project upward, and a side frame detachably attached to the main frame to project upward, one of the booms being pivotally supported at a proximal end thereof by an upper end of the side frame to be vertically swingable; and    a laterally inward end of said support base is fixed to one of said connecting frames, said support base projecting laterally outward from the connecting frame, said valve stay projecting laterally outward from a position of the connecting frame rearward of the support base, said control valve being disposed rearwardly of the support base and a lower portion of the main frame.    
   
   
       12 . A loader work vehicle as defined in  claim 8 , wherein said control valve has a plurality of spools corresponding to the hydraulic cylinders of the front loader; and said control valve is disposed in vertical posture to have 
 the plurality of spools arranged vertically and projecting laterally outward from positions vertically spaced apart of a valve body, said control valve being attached to the valve stay such that a direction of thickness of the control valve coincides with a fore and aft direction.