Operator cab for construction machine

Abstract

An operator cab 53 , which is mounted rotatable on the vehicle body 51 of a hydraulic mini-shovel 50 , comprises a cab box 1 , a door 2 , upper and lower link members 3 and 4 , a slide member 6 , a closed door lock 7 , an opened door lock 9 and a handle 13 . The cab box 1 has an internal cab room 1 a and an entrance 15 , which leads into the cab room 1 a. The door 2 closes and opens the entrance 15 when it is moved forward and rearward, respectively. The upper and lower link members 3 and 4 have fixed ends 3 a and 4 a, each of which is connected pivotally to the cab box 1 , and moving ends 3 b and 4 b, each of which is connected pivotally to the front end of the door 2 . The slide member 6 is connected pivotally to the rear end of the door 2 so as to swing freely and slides along a slide rail 5 , which is provided externally on the cab box 1 . The closed door lock 7 , which is provided at the front end of the door 2 , engages with a closed door striker 8 , which is provided on the cab box 1 , when the door 2 is closed. The opened door lock 9 , which is provided at the front end of the door 2 , engages with an opened door striker 10 , which is provided on the cab box 1 , when the door 2 is opened. The handle 13 is provided at the front end of the door 2 and interlocked with the closed door lock 7 and the opened door lock 9.

Description

technical field [0001] The present invention relates to a cab of a construction machine, and specifically relates to a cab of a construction machine having a door for opening and closing an entrance. Background technique [0002] A construction machine such as a hydraulic small excavator is configured to perform work by rotating a cab, a work machine, and the like disposed on a vehicle body. The door that is opened and closed to allow the operator to enter and exit the cab can be operated not only in the closed state but also in the open state. Figure 10 A large-scale construction machine 60 is shown, which has a turntable 62 rotatably provided on a vehicle body 61 , and a cab 63 is attached to the turntable 62 . In the case of such a large construction machine 60, the radius of rotation R' is relatively large, so even if the door 64 of the cab 63 is opened, the door 64 will not exceed the radius of rotation R', but the radius of rotation of the s...

AI Technical Summary

Problems solved by technology

Therefore, its problem is that the central part of the door needs to be connected with the handle and the lock to make the lock disengage with respect to the mechanism part of the striker lock, and the part where the mechanism part is arranged cannot be provided with windows, etc., so that the field of vision is blocked, and the door structure is complicated, which increases the manufacturing cost. Increase, and then make the door thicker, weight increased, etc.

Moreover, in terms of operability at the time of opening and closing, the opening and closing feeling caused by the loose fit of the rollers constituting the sliding mechanism and the sliding guide rail is poor, and the trajectory of the door when it is about to close, its front side moves toward the direction of scraping with the cab and then The side moves along the side of the cab, so not only the operating feeling is poor, but also the door is not well sealed causing water leakage

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