JPH0362143U

JPH0362143U -

Info

Publication number: JPH0362143U
Application number: JP12072989U
Authority: JP
Priority date: 1989-10-16
Filing date: 1989-10-16
Publication date: 1991-06-18

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す側面図、第２
図は第１図のＡ−Ａ線断面矢視図、第３図は第１
図の要部の拡大縦断面図、第４図は同実施例の駆
動用油圧回路図、第５図は従来例の一部を断面し
た側面図、第６図は従来例の駆動用油圧回路図で
ある。１……上部旋回体、２……下部旋回体、４ａ…
…外輪、４ｂ……内輪、５……プレート、８……
円筒体、８ａ……円筒、８ｂ……内輪受、１０…
…ロツド、１０ａ……フランジ、１０ｂ……パツ
ド、１１……スプリング、１３……ステイ、１４
……ピン、１５……油圧シリンダー、１７……油
圧モータ、１８……油圧ポンプ、１９，３９……
配管、２０……リリーフ弁、２１……切換弁、２
５……ピニオンシヤフト、２６……レバー本体、
３１……ギア、３２……上部レバー、３３……ピ
ストン、３４……下部レバー、３５……油圧回路
、３７……リザーバ、３６，３８……オイル室。 Figure 1 is a side view showing one embodiment of the present invention;
The figure is a cross-sectional view taken along line A-A in Figure 1, and Figure 3 is a cross-sectional view of Figure 1.
4 is a drive hydraulic circuit diagram of the same embodiment, FIG. 5 is a partially sectional side view of the conventional example, and FIG. 6 is a drive hydraulic circuit of the conventional example. It is a diagram. 1... Upper rotating body, 2... Lower rotating body, 4a...
...Outer ring, 4b...Inner ring, 5...Plate, 8...
Cylindrical body, 8a...Cylinder, 8b...Inner ring holder, 10...
...rod, 10a...flange, 10b...pad, 11...spring, 13...stay, 14
...Pin, 15...Hydraulic cylinder, 17...Hydraulic motor, 18...Hydraulic pump, 19,39...
Piping, 20...Relief valve, 21...Switching valve, 2
5...Pinion shaft, 26...Lever body,
31...Gear, 32...Upper lever, 33...Piston, 34...Lower lever, 35...Hydraulic circuit, 37...Reservoir, 36, 38...Oil chamber.

Claims

[Claims for Utility Model Registration] An outer ring fixed to the lower surface of the upper revolving body, an inner ring disposed on the upper surface of the lower traveling body and having a gear carved on its inner periphery, and a pinion shaft meshing with the gear. a hydraulic motor that rotationally drives the hydraulic motor; a hydraulic pump; a switching valve that is disposed between the hydraulic pump and the hydraulic motor and switches the rotational direction of the hydraulic motor and cuts off a hydraulic circuit to the hydraulic motor; and an inlet/outlet pipe of the hydraulic motor, and a hydraulic circuit for swing drive in which a pair of relief valves in opposite directions are arranged in a pair of pipes, the hydraulic circuit is fixed to the upper surface of the lower traveling body. a cylindrical body having the inner ring fixed to its upper surface; a plurality of plates fixed around the outer ring on the lower surface of the upper revolving body; and a hydraulic cylinder having a built-in piston attached to the inner surface of each of the plates. , a hydraulic circuit in which an oil chamber outside the piston is connected to a pipe extending from the hydraulic pump to the switching valve, and an oil chamber inside the piston is drained to a reservoir; and a spring is attached to each plate. a rod which is biased inwardly through the lever body and has a pad formed at its tip that can move toward and away from the cylindrical outer periphery of the cylindrical body, and the rod is connected to the piston through the lever body. Features a swing brake device.