Title:
COUNTERWEIGHT ATTACHING/DETACHING DEVICE
Document Type and Number:
Japanese Patent JP2018058693
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a counterweight attaching/detaching device that is capable of reducing the weight of a machine body side lower link and its attachment part, the machine body side lower link being provided at the rear part of a swivel base and having a distal end at which a hydraulic cylinder for lift is mounted, and that makes operation velocity of the hydraulic cylinder for lift close to operation velocity of the counterweight to control the velocity of the counterweight.SOLUTION: A counterweight attaching/detaching device 10 is provided at the rear part of a swivel base 3 of a movable crane, and removably mounts a counterweight 40, the counterweight attaching/detaching device 10 comprising a machine body side upper link 11 and a machine body side lower link 21 that are provided vertically apart from each other at the rear part of the swivel base 3 to lock the counterweight 40, and a hydraulic cylinder for lift 16 that is arranged between distal ends of the machine body side upper link 11 and the machine body side lower link 21 and that liftably and pivotably drives the machine body side upper link 11 around its longitudinal intermediate part serving as a pivoting support point. The counterweight attaching/detaching device 10 arranges a machine body side tension bar between the machine body side lower link 21 and a bracket unit 30 located at the side closer to the machine body side upper link 11.SELECTED DRAWING: Figure 1
Inventors:
SAKAMOTO JOJI
Application Number:
JP2016199081A
Publication Date:
April 12, 2018
Filing Date:
October 07, 2016
Export Citation:
Assignee:
KATO SEISAKUSHO KK
International Classes:
B66C23/74; E02F9/18
Domestic Patent References:
| JPS4730257U | 1972-12-06 | |||
| JPH0375478B2 | 1991-12-02 | |||
| JPS6421196U | 1989-02-02 | |||
| JPH0912278A | 1997-01-14 | |||
| JPH0169855U | 1989-05-09 | |||
| JP2016044512A | 2016-04-04 | |||
| JP2020029320A | 2020-02-27 |
Foreign References:
| WO2012170265A2 | 2012-12-13 |
Attorney, Agent or Firm:
Isamu Takahashi