JPH02112745U

JPH02112745U -

Info

Publication number: JPH02112745U
Application number: JP2085889U
Authority: JP
Priority date: 1989-02-23
Filing date: 1989-02-23
Publication date: 1990-09-10

Description

[Brief explanation of the drawing]

第１図はこの考案にかかる旋回縮小装置をそな
えた油圧シヨベルの側面図、第２図は第１図のＣ
部詳細図、第３図は第２図のＤ−Ｄ断面図、第４
図はこの考案のブロツク部材の斜視図、第５図は
この考案の旋回縮小装置を標準仕様にしている油
圧シヨベルの側面図、第６図は旋回縮小変更を行
つている油圧シヨベルの作業姿勢図、第７図はこ
の考案の他実施例旋回縮小装置を示す要部側面図
第８図は従来技術旋回縮小装置をそなえた油圧シ
ヨベルの側面図、第９図は旋回縮小変更を行つて
いる油圧シヨベルの従来技術作業姿勢図である。１，１１，２６……旋回縮小装置、４，４′…
…作業アタツチメント、５，１２，２７……ブー
ム、６……ブームシリンダ、７，１３……ブラケ
ツト部材、１０，１０′……連結ピン、１４，３
２……ガイド溝部、１８……ロツドボス部、１９
，３０……ブロツク部材、２０，３６……基端部
、２２，２９……ガイド部、２３……係止ピン。 Figure 1 is a side view of a hydraulic excavator equipped with a swing reduction device according to this invention, and Figure 2 is C of Figure 1.
Detailed view of the part, Fig. 3 is a sectional view taken along line DD in Fig. 2, Fig. 4
The figure is a perspective view of the block member of this invention, Figure 5 is a side view of a hydraulic excavator that has the swing reduction device of this invention as standard specification, and Figure 6 is a diagram of the working posture of a hydraulic excavator that is changing the swing reduction. , Fig. 7 is a side view of the main parts of a swing reduction device according to another embodiment of this invention. Fig. 8 is a side view of a hydraulic excavator equipped with a swing reduction device according to the prior art. FIG. 2 is a diagram showing a conventional work posture of a shovel. 1, 11, 26...Swivel reduction device, 4, 4'...
...Work attachment, 5, 12, 27... Boom, 6... Boom cylinder, 7, 13... Bracket member, 10, 10'... Connection pin, 14, 3
2... Guide groove part, 18... Rod boss part, 19
, 30...Block member, 20, 36... Base end portion, 22, 29... Guide portion, 23... Locking pin.

Claims

[Scope of utility model registration request]

In a hydraulic excavator in which a work attachment is attached to the front part of the upper revolving structure, and the boom of the work attachment can be raised and lowered by a boom cylinder, a guide groove extending in the front and rear direction is formed in the bracket member on the central ventral surface of the boom, and a hole is formed in the bracket member. A plurality of pin holes are drilled whose center is horizontal in the left and right directions, and a guide portion is provided in the rod boss portion of the boom cylinder to fit into the guide groove portion, and a plurality of pin holes are drilled whose center is in the left and right horizontal directions. The base end of the block member is pivotally connected, and the guide portion of the block member is displaced along the guide groove portion of the bracket member when the rotation reduction specification of the work attachment is changed, and further, the guide portion of the block member is moved at the displaced position. 1. A swing reduction device for a hydraulic excavator, characterized in that a locking pin can be fitted into the plurality of pin holes of the block member by penetrating the plurality of pin holes of the block member.