Operator's cab for a work machine

Abstract

An operator's cab for a work machine includes a ceiling structure and a floor structure. An operator's station is disposed between the ceiling structure and the floor structure, and is configured to position an operator in a driving position. First and second vertical support bars extend from the ceiling structure to the floor structure. The first and second vertical support bars are disposed forwardly of the operator's station land are spaced a substantially equal distance from a longitudinal axis of the work machine. Third and fourth vertical support bars also extend from the ceiling structure to the floor structure. The third and fourth vertical support bars are spaced a substantially equal distance from the longitudinal axis. The distance from the first and second vertical support bars to the longitudinal axis is less than the distance from the third and fourth vertical support bars to the longitudinal axis.

1 . An operator's cab for a work machine, comprising: 
 a ceiling structure;    a floor structure;    an operator's station disposed between the ceiling structure and the floor structure, and configured to position an operator in a driving position;    first and second vertical support bars extending from the ceiling structure to the floor structure, the first and second vertical support bars being disposed forwardly of the operator's station, and being spaced a substantially equal distance from a longitudinal axis of the work machine; and    third and fourth vertical support bars extending from the ceiling structure to the floor structure, the third and fourth vertical support bars being spaced a substantially equal distance from the longitudinal axis,    wherein the distance from the first and second vertical support bars to the longitudinal axis is less than the distance from the third and fourth vertical support bars to the longitudinal axis.    
   
   
       2 . The operator's cab of  claim 1 , wherein the operator's station is a seat.  
   
   
       3 . The operator's cab of  claim 1 , including fifth and sixth vertical support bars extending from the ceiling structure to the floor structure, the fifth and sixth vertical support bars being disposed at a rear of the cab and being spaced a substantially equal distance from the longitudinal axis, 
 wherein the distance from the first and second vertical support bars to the longitudinal axis is less than the distance from the fifth and sixth vertical support bars to the longitudinal axis.    
   
   
       4 . The operator's cab of  claim 1 , including fifth and sixth vertical support bars extending from the ceiling structure to the floor structure, the third, fourth, fifth, and sixth vertical support bars defining a substantially rectangular shape, the operator's station being substantially disposed within the rectangular shape.  
   
   
       5 . The operator's cab of  claim 1 , including a door disposed in at least one of a first area between the first and third support bars and a second area between the second and fourth vertical support bars.  
   
   
       6 . The operator's cab of  claim 1 , wherein the floor structure is beveled to be more narrow between the first and second vertical support bars than between the third and fourth vertical support bars.  
   
   
       7 . The operator's cab of  claim 1 , wherein the first and second vertical support bars are disposed at an incline such that a top portion of the first and second vertical support bars is positioned farther away from the operator's station than a bottom portion of the vertical support bars.  
   
   
       8 . The operator's cab of  claim 1 , wherein an area between the first and third support bars and an area between the second and fourth vertical support bars is unobstructed by any other support bar.  
   
   
       9 - 23 . (canceled)  
   
   
       24 . The operator's cab of  claim 2 , wherein the third and fourth vertical support bars are disposed adjacent a front of the seat on opposing sides of the seat.  
   
   
       25 . The operator's cab of  claim 1 , wherein one of the first and second vertical support bars and one of the third and fourth vertical support bars form an oblique wall.  
   
   
       26 . The operator's cab of  claim 25 , wherein the oblique wall is made of a transparent material.  
   
   
       27 . An operator's cab for a work machine, comprising: 
 a ceiling;    a floor;    an operator's station disposed between the ceiling and the floor and configured to position an operator in a driving position;    a front wall;    a back wall;    two side walls; and    two oblique walls; 
 wherein each of the oblique walls is connected to the front wall and a side wall, and each side wall is connected to an oblique wall and the back wall.  
   
   
   
       28 . The operator's cab of  claim 27 , wherein the side walls are substantially perpendicular to both the front wall and the back wall.  
   
   
       29 . The operator's cab of  claim 27 , wherein the front wall includes a window.  
   
   
       30 . The operator's cab of  claim 27 , wherein the back wall includes a window.  
   
   
       31 . The operator's cab of  claim 27 , wherein at least a portion of the side walls are made of a transparent material.  
   
   
       32 . The operator's cab of  claim 27 , wherein at least a portion of the oblique walls are made of a transparent material.  
   
   
       33 . A motor grader, comprising: 
 a front frame;    a rear frame disposed adjacent the front frame;    an operator's station disposed between a ceiling structure and a floor structure, and configured to position an operator in a driving position;    first and second vertical support bars extending from the ceiling structure to the floor structure, the first and second vertical support bars being disposed forwardly of the operator's station, and being spaced a substantially equal distance from a longitudinal axis of the work machine; and    third and fourth vertical support bars extending from the ceiling structure to the floor structure, the third and fourth vertical support bars being spaced a substantially equal distance from the longitudinal axis,    wherein the distance from the first and second vertical support bars to the longitudinal axis is less than the distance from the third and fourth vertical support bars to the longitudinal axis.    
   
   
       34 . The motor grader of  claim 33 , including fifth and sixth vertical support bars extending from the ceiling structure to the floor structure, the fifth and sixth vertical support bars being disposed at a rear of the cab and being spaced a substantially equal distance from the longitudinal axis, 
 wherein the distance from the first and second vertical support bars to the longitudinal axis is less than the distance from the fifth and sixth vertical support bars to the longitudinal axis.    
   
   
       35 . The motor grader of  claim 33 , including fifth and sixth vertical support bars extending from the ceiling structure to the floor structure, the third, fourth, fifth, and sixth vertical support bars defining a substantially rectangular shape, the operator's station being substantially disposed within the rectangular shape.