Construction Machine

摘要

A post-treatment, device mounting frame (20) on which an exhaust gas post-treatment device (13) is mounted is constituted by a front mounting leg (21), a rear mounting leg (24), and a deck (27) connecting the front and rear mounting legs (21) and (24) to each other. A vertical leg part (22) of the front mounting leg (21) is mounted on a front vertical leg part mounting plate (5F) of a right front extension beam (5E2). A lateral leg part (23) of the front mounting leg (21) is mounted on a front lateral leg part mounting plate (5M) of a right front engine support bracket (5K). A vertical leg part (25) of the rear mounting leg (24) is mounted on a rear vertical leg part mounting plate (5G) of a right rear extension beam (5E3). A lateral leg part (26) of the rear mounting leg (24) is mounted on a rear lateral leg part mounting plate (5N) of a right rear engine support bracket (5L). Therefore, the post-treatment device mounting frame (20) is firmly mounted in a state of four-point support on a revolving frame (5).

主权项

1. A construction machine comprising:
a vehicle body frame (5) forming a support structural body of a vehicle body; an engine (9) mounted on said vehicle body frame (5) in a laterally placed state extending in a left and right direction; a hydraulic pump (II) mounted on said engine (9) by being located on one side of said engine (9) in the left and right direction; an exhaust gas post-treatment device (13) connected to said engine (9) through an exhaust pipe (12) and executing post-treatment to the exhaust gas exhausted from, said engine (9); and a post-treatment device mounting frame (20) provided on said vehicle body frame (5) and on which said exhaust gas post-treatment device (13) is mounted; wherein said vehicle body frame (5) includes: a center frame (5A) having a bottom plate (5A1) and left and right vertical plates (5A2), (5A3) installed upright on said bottom, plate (5A1) and extending in a front, and rear direction, left and right side frames (5B), (5C) arranged on both left and right sides interposing said center frame (5A) and extending in the front and rear direction, a plurality of extension beams (5D1), (5D2), (5D3), (5E1), (5E2), (5E3) extending in the left, and right direction at an interval in the front and rear direction in order to connect said left and right side frames (5B), (5C) and said center frame (5A) to each other, and a front engine support bracket (5H), (5K) and a rear engine support bracket (5J), (5L) provided separately to a front side and a rear side on said center frame (5A) and supporting said engine (9) through a vibration isolating member (10); characterized in that: said post-treatment device mounting frame (20) includes: a front mounting leg (21) mounted on said front engine support bracket (5K) and said front extension beam (5E2) located in the vicinity of said front engine support bracket (5K) in said plurality of extension beams (5E1), (5E2), (5E3), respectively, a rear mounting leg (24) mounted on said rear engine support bracket (5L) and said rear extension beam (5E3) located in the vicinity of said rear engine support bracket (5L) in said plurality of extension beams (5E1), (5E2), (5E3), respectively, and a deck (27) extending in the front and rear direction between said front mounting leg (21) and said rear mounting leg (24) and connecting upper part positions of said front mounting leg (21) and said rear mounting leg (24), and said exhaust gas post-treatment device (13) is mounted on said deck (27) of said post-treatment device mounting frame (20).