Cab frame structure for construction machine
First Claim
1. A cab frame structure for a construction machine, characterized in thatthe cab frame includes one continuous tubular material configured to have a front pillar portion and a roof pillar portion joined together by a curved portion;
- wherein the curved portion is configured to include a curve outer side having one curvature radius and a curve inner side having other curvature radius, the one curvature radius of the curve outer side in said curved portion in said tubular material being smaller than the other curvature radius of the curve inner side in said tubular material,wherein the curved portion is further configured to have a space to accommodate the raised position of a top end of a front window unit supported by said front portion; and
the cab frame further includes a front header, which is positioned at the top end of said front window unit accommodated in said space, arranged in the curve outer side in said curved portion.
1 Assignment
0 Petitions
Accused Products
Abstract
Object
In a cab frame structure for a construction machine in which a front pillar and a roof pillar are configured by one tubular material, the cab frame structure for the construction machine in which an attachment position of a front header can be reversibly raised and an upward viewing angle of a driver is enlarged is provided.
Solving Means
A front pillar 1 and a roof pillar 2, which constitute a cab frame of the construction machine, are configured by one tubular material 9 having a curved portion 10 at a joint between them, and by making a curvature radius of a curve outer side 10a in the curved portion 10 smaller than a curvature radius of a curve inner side 10b, a space 12 to raise an accommodation position of a top end 7x of a front window unit 7 is formed in the curved portion 10. A front header 4 is arranged at the position of the top end 7x of the front window unit 7 accommodated in the space 12. With this configuration, the attachment of the front header 4 can be reversibly raised, and an upward viewing angle θ2 of a driver can be expanded.
60 Citations
18 Claims
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1. A cab frame structure for a construction machine, characterized in that
the cab frame includes one continuous tubular material configured to have a front pillar portion and a roof pillar portion joined together by a curved portion; -
wherein the curved portion is configured to include a curve outer side having one curvature radius and a curve inner side having other curvature radius, the one curvature radius of the curve outer side in said curved portion in said tubular material being smaller than the other curvature radius of the curve inner side in said tubular material, wherein the curved portion is further configured to have a space to accommodate the raised position of a top end of a front window unit supported by said front portion; and the cab frame further includes a front header, which is positioned at the top end of said front window unit accommodated in said space, arranged in the curve outer side in said curved portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification