Swingable connection structure and crane provided with swingable connection structure

Patent metadata

Field	Value
Publication number	US-11046560-B2
Application number	US-201916418661-A
Country	US
Kind code	B2
Filing date	May 21, 2019
Priority date	May 23, 2018
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

Provided is a swingable connection structure capable of detachably connecting a first member and a second member to each other easily. The swingable connection structure has a first member, a second member, and a swing holding member, and the second member is swingably connected to the first member. The first member has a swing shaft which defines a swing center axis of the second member, and the second member has a pivotally supported portion which receives the swing shaft. The swing holding member is mounted on a side surface of the second member in a rotatable manner, and the swing holding member is provided with a constraining hole which allows insertion of one end portion of the swing shaft received by the pivotally supported portion.

First claim

The invention claimed is:

1. A swingable connection structure for swingably connecting a first member and a second member to each other, the swingable connection structure comprising:
a first connecting portion which forms a portion of the first member;
a second connecting portion which forms a portion of the second member, and is connected to the first connecting portion in a swingable manner about a horizontal swing center axis; and
a swing holding member which holds a swingable state of the second connecting portion with respect to the first connecting portion,
wherein the first connecting portion has a swing shaft which extends in a horizontal direction and in which a center axis of the swing shaft forms the swing center axis,
the second connecting portion has: a pair of side surfaces which respectively intersect with an axial direction of the swing shaft and are arranged on sides opposite to each other; a connecting surface which connects the pair of side surfaces to each other along the axial direction; and a pivotally supported portion which is disposed on the connecting surface of the second member, receives the swing shaft along a direction orthogonal to the axial direction, and is fitted on the swing shaft such that the second connecting portion is swingable about the swing center axis,
the swing holding member includes:
a first end portion which is supported on one side surface out of the pair of side surfaces of the second connecting portion in a rotatable manner about a horizontal rotary center axis; and
a second end portion which is disposed on a side opposite to the first end portion, the second end portion being provided with a constraining hole which allows insertion of one end portion of the swing shaft in an axial direction along the axial direction, and
in a state where the one end portion of the swing shaft is inserted into the constraining hole, the swing holding member constrains a relative position of the second connecting portion with respect to the swing shaft in a radial direction of the swing shaft, and the swing holding member swings together with the second connecting portion about the swing center axis.

2. The swingable connection structure according to claim 1 , wherein
the first connecting portion has a pair of swing shaft support portions which are disposed spaced apart from each other in an axial direction of the swing shaft, respectively includes a constraining surface which constrains the second connecting portion in the axial direction, and supports the swing shaft, and
the pivotally supported portion of the second connecting portion is supported on the swing shaft between the pair of swing shaft support portions in a state where the pair of side surfaces are disposed so as to respectively opposedly face the constraining surfaces of the pair of swing shaft support portions.

3. The swingable connection structure according to claim 1 , wherein
the swing holding member is configured to change a posture between a first posture and a second posture along rotation of the swing holding member about the rotary center axis,
the first posture is a posture in which the constraining hole of the second end portion is capable of receiving the one end portion of the swing shaft,
the second posture is a posture in which the swing holding member is rotated about the rotary center axis from the first posture and the second end portion is disposed on a side opposite to the one end portion of the swing shaft with respect to the first end portion, and
the second connecting portion has a holding portion for holding the second end portion in a state where the swing holding member assumes the second posture.

4. The swingable connection structure according to claim 1 , wherein the second connecting portion has a constraining portion for constraining the swing holding member in an axial direction of the swing shaft.

5. The swingable connection structure according to claim 1 , wherein
the second connecting portion has a support shaft which is fixed to the one side surface in a state where the support shaft extends parallel to the swing shaft,
a support shaft hole portion which allows insertion of the support shaft along an axial direction of the swing shaft is formed in the first end portion of the swing holding member, and
along with insertion of the support shaft into the support shaft hole portion along an axial direction, the swing holding member is rotatably supported on the support shaft about the rotary center axis.

6. A crane comprising:
a lower traveling body;
an upper slewing body which is supported on the lower traveling body in a slewable manner about a slewing center axis extending in a vertical direction; and
the swingable connection structure according to claim 1 .

7. The crane according to claim 6 , further comprising a derrick body which is supported on the upper slewing body in a state where the derrick body is capable of being raised and lowered,
wherein the upper stewing body forms the first member, and the derrick body forms the second member.

Assignees

• Kobelco Constr Mach Co Ltd

Inventors

• Koyahata Akira

Classifications

• B66C23/60

  Derricks · CPC title

• B66C23/62 Primary

  Constructional features or details (of dredgers E02F) · CPC title

• B66C23/36

  mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes (with pneumatic or hydraulic motors B66C23/54; vehicle or ship aspects B60 - B63) · CPC title

• B66C23/82

  Luffing gear · CPC title

• F16B5/0004

  Joining sheets, plates or panels in abutting relationship (F16B5/01 takes precedence) · CPC title