Upper slewing body for use in construction machine

Patent metadata

Field	Value
Publication number	US-9333992-B2
Application number	US-201514801195-A
Country	US
Kind code	B2
Filing date	Jul 16, 2015
Priority date	Aug 1, 2014
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

Provided is an upper slewing body comprising: an upper frame, a cab including a bottom frame, a plurality of pillars including an outer pillar, and an entrance; an antivibration mount; a displacement restrainer restraining a cab displacement in a direction of rising away from the upper frame; and a reinforcing member attached to a lower end of the outer pillar for reinforcing a joint between the lower end and the bottom frame. The displacement restrainer includes a penetrating member vertically penetrating the reinforcing member and the bottom frame and secured to the upper frame. The displacement restrainer and the reinforcing member includes respective load transmitting surfaces for transmitting a load to each other above the joint between the bottom frame and the outer pillar when the cab is displaced in the rising direction by a specific amount or more.

First claim

The invention claimed is:

1. An upper slewing body for use in a construction machine, the upper slewing body configured to be mounted on a lower travelling body of the construction machine so as to be slewable and comprising:
an upper frame including a left side portion and a right side portion;
a cab mounted on one of the left side portion and the right side portion, the cab including a bottom frame constituting a bottom wall of the cab, a plurality of pillars each having a lower end joined to an upper surface of the bottom frame to thereby allow the pillar to stand on a periphery of the cab, and an entrance opening on an outer side of the upper frame, the plurality of pillars including an outer pillar located on a side where the entrance opening exists;
an antivibration mount for suppressing a vibration of the cab;
a displacement restrainer for limiting a relative displacement of the cab with respect to the upper frame in a direction of rising away from the upper frame to a specific amount or less; and
a reinforcing member attached to the lower end of the outer pillar to reinforce the joint between the lower end and the bottom frame, wherein
the displacement restrainer includes a penetrating member vertically penetrating the reinforcing member and the bottom frame and being secured to the upper frame, and
the displacement restrainer and the reinforcing member includes respective load transmitting surfaces vertically opposed to each other so as to transmit a load to each other at a position above the joint between the bottom frame and the outer pillar when the cab is displaced in the rising direction by the specific amount or more.

2. An upper slewing body for use in a construction machine according to claim 1 , wherein the reinforcing member includes a horizontal wall formed with a penetrating-member passage hole allowing the penetrating member to penetrate therethrough, and the displacement restrainer further includes a washer placed around the penetrating member, the horizontal wall having an upper surface serving as the load transmitting surface of the reinforcing member, the washer having a lower surface serving as the load transmitting surface of the displacement restrainer.

3. An upper slewing body for use in a construction machine according to claim 2 , further comprising a sealing member made of an elastic material and being disposed between the respective load transmitting surfaces of the reinforcing member and the displacement restrainer, the sealing member configured to seal a space defined around the penetrating member penetrating the reinforcing member and the bottom frame when deformation of the antivibration mount is equal to or less than a permissible deformation amount, and configured to transmit a load between the load transmitting surfaces when deformation of the antivibration mount exceeds the permissible deformation amount.

4. An upper slewing body for use in a construction machine according to claim 2 , wherein the reinforcing member is in the form of a box including a front wall, a rear wall, a left wall, a right wall, a top wall and a bottom wall to define an internal space, the top wall having an upper surface serving as the load transmitting surface of the reinforcing member, the reinforcing member being attached to the outer pillar while an outer surface of one of the front wall, the rear wall, the left wall and the right wall makes surface contact with a side surface of the outer pillar.

5. An upper stewing body for use in a construction machine according to claim 4 , wherein the outer surface of the reinforcing member making surface contact with the outer pillar has a greater dimension in plan view than a dimension in plan view of the side surface of the outer pillar making surface contact with the outer surface.

6. An upper slewing body for use in a construction machine according to claim 1 , wherein the outer pillar attached with the reinforcing member is a pillar disposed at a rear portion of the cab.

7. An upper stewing body for use in a construction machine according to claim 1 , wherein the reinforcing member is attached to the outer pillar, while disposed inside the cab.

Assignees

• Kobelco Constr Mach Co Ltd

Inventors

• Kinoshita Akira
• Yamamoto Keiji
• Kawakami Yuji

Classifications

• B62D33/0604 Primary

  Cabs insulated against vibrations or noise, e.g. with elastic suspension (resilient connections between superstructure sub-units B62D27/04; damping noise in general G10K11/00; for vehicles in general B60R13/08) · CPC title

• E02F9/166

  movable, tiltable or pivoting, e.g. movable seats, dampening arrangements of cabins (seats for vehicles in general B60N2/00) · CPC title

• F16F15/10

  Suppression of vibrations in rotating systems by making use of members moving with the system (by balancing F16F15/22 {; yielding couplings F16D3/00} ; with flywheels acting variably or intermittently F16H {; construction providing resilience or vibration-damping for gear elements F16H55/14}) · CPC title

• B62D33/0617

  for tractors or off-the-road vehicles (protective devices for drivers in case of overturning of tractors B60R21/131) · CPC title

• E02F9/163

  Structures to protect drivers, e.g. cabins, doors for cabins; Falling object protection structure [FOPS]; Roll over protection structure [ROPS] (for handrails mounted on cabins E02F9/0833 takes precedence; for vehicles in general B60R21/11, B60R21/13, for fork-lift trucks B66F9/07545) · CPC title