JPH0457548U

JPH0457548U -

Info

Publication number: JPH0457548U
Application number: JP9972090U
Authority: JP
Priority date: 1990-09-26
Filing date: 1990-09-26
Publication date: 1992-05-18

Description

[Brief explanation of the drawing]

第１図は本願考案を施する対象物である油圧シ
ヨベルの側面図であり、第２図は第１図の油圧シ
ヨベルの下部走行体と走行駆動装置を示した平面
図であり、第３図は旋回ベアリングの拡大縦断面
図であり、第４図は旋回ベアリングの取付部の縦
断面図であり、第５図は旋回ベアリングのロツク
装置の平面図であり、第６図は第５図のロツク装
置と要部縦断面図であり、第７図は走行２速切替
えと旋回ベアリングロツク油圧回路図であり、第
８図は第７図の旋回ベアリングロツク油圧回路図
に旋回ベアリングロツク装置優先回路を設けてな
る油圧回路図であり、第９図は油圧パイロツトバ
ルブの説明図であり、第１０図は旋回ベアリング
ロツク操作バルブの説明図であり、第１１図は走
行速度高低２速切替えバルブの説明図である。１……油圧ライン、２……油圧ライン、３……
油圧ライン、４……油圧ライン、５……油圧ライ
ン、６……油圧ライン、７……油圧ライン、８…
…油圧ライン、９……油圧ライン、１０……油圧
ライン、１１……油圧ライン、１２……油圧ライ
ン、１３……油圧ライン、１４……油圧ライン、
１５……油圧ライン、１６……油圧ライン、１７
……油圧ライン、１８……油圧ポンプ、１９……
油圧ポンプ、２０……油圧ポンプ、２１……レバ
ー、２２……レバー、２３……レバー、２４……
レバー、２５……走行モータ制御バルブ、２６…
…走行モータ制御バルブ、２７……旋回ベアリン
グロツク操作バルブ、２８……走行速度高低２速
切替えバルブ、２９……油圧パイロツトバルブ、
３３……油圧パイロツトバルブ、３１……油圧ラ
イン、３２……油圧ライン、３３……油圧ライン
、３４……油圧ライン、３５……油圧ライン、３
６……油圧ライン、３７……油圧ライン、３８…
…油圧ライン、３９……油圧ライン、４０……油
圧ライン、４１……油圧ライン、４２……油圧ラ
イン、４３……シヤツトルバルブ、４４……シヤ
ツトルバルブ、４５……斜板の傾転角度を制御す
るレギユレータ、４６……斜板、４７……斜板の
傾転角度を制御するレギユレータ、４８……斜板
、４９……油圧モータ、５０……油圧モータ、５
１……油圧ライン、５２……油圧ライン、５３…
…油圧ライン、５４……油圧ライン、５５……油
圧ライン、５６……作動油タンク、５７……油圧
ロツクシリンダ、５８……圧油室、５９……ピス
トン、６０……圧油室、６１……サポート、６２
……テーパ座ぐり部分、６３……走行減速機、６
４……走行減速機、６５……スプロケツト駆動輪
、６６……スプロケツト駆動輪、６７……履帯、
６８……履帯、６９……上部旋回体フレーム、７
０……油圧ライン、７１……油圧ライン、７２…
…油圧ライン、７３……油圧ライン、７４……油
圧ライン、７５……作業機、７６……遊動輪、７
７……運転席、７８……上部旋回体、７９……旋
回ベアリング、８０……駆動輪、８１……下部走
行体、８２……履帯、８３……下部走行体フレー
ム、８４……走行減速機、８５……油圧走行モー
タ、８６……旋回ベアリングインナレース、８７
……旋回ベアリングアウタレース、８８……旋回
ベアリングボール、８９……インナレース内歯、
９０……上部旋回体フレーム、９１……旋回減速
機、９２……旋回モータ、９３……ロツクシリン
ダ、９４……リリース油圧ライン、９５……ロツ
ク油圧ライン、９６……油圧パイロツトバルブ、
９７……旋回ベアリングロツク操作バルブ、９８
……走行速度高低２速切替えバルブ、９９……モ
ーメント隙間、１００……スラスト隙間、１０１
……ラジヤル隙間、１０２……ボール。 FIG. 1 is a side view of a hydraulic excavator to which the present invention is applied, FIG. 2 is a plan view showing the lower traveling body and traveling drive device of the hydraulic excavator of FIG. 1, and FIG. is an enlarged longitudinal sectional view of the slewing bearing, FIG. 4 is a longitudinal sectional view of the mounting part of the slewing bearing, FIG. 5 is a plan view of the locking device of the slewing bearing, and FIG. Fig. 7 is a hydraulic circuit diagram of the swivel bearing lock and the hydraulic circuit diagram of the swivel bearing lock, and Fig. 8 is a hydraulic circuit diagram of the swivel bearing lock in Fig. 7, and a priority circuit of the swivel bearing lock. FIG. 9 is an explanatory diagram of a hydraulic pilot valve, FIG. 10 is an explanatory diagram of a swing bearing lock operation valve, and FIG. It is an explanatory diagram. 1...Hydraulic line, 2...Hydraulic line, 3...
Hydraulic line, 4... Hydraulic line, 5... Hydraulic line, 6... Hydraulic line, 7... Hydraulic line, 8...
...Hydraulic line, 9...Hydraulic line, 10...Hydraulic line, 11...Hydraulic line, 12...Hydraulic line, 13...Hydraulic line, 14...Hydraulic line,
15...Hydraulic line, 16...Hydraulic line, 17
...Hydraulic line, 18...Hydraulic pump, 19...
Hydraulic pump, 20...Hydraulic pump, 21...Lever, 22...Lever, 23...Lever, 24...
Lever, 25...Travel motor control valve, 26...
...Traveling motor control valve, 27... Swivel bearing lock operation valve, 28... Travel speed high/low two-speed switching valve, 29... Hydraulic pilot valve,
33...Hydraulic pilot valve, 31...Hydraulic line, 32...Hydraulic line, 33...Hydraulic line, 34...Hydraulic line, 35...Hydraulic line, 3
6...Hydraulic line, 37...Hydraulic line, 38...
...Hydraulic line, 39...Hydraulic line, 40...Hydraulic line, 41...Hydraulic line, 42...Hydraulic line, 43...Shuttle valve, 44...Shuttle valve, 45...Swash plate tilting Regulator for controlling the angle, 46... Swash plate, 47... Regulator for controlling the tilt angle of the swash plate, 48... Swash plate, 49... Hydraulic motor, 50... Hydraulic motor, 5
1...Hydraulic line, 52...Hydraulic line, 53...
... Hydraulic line, 54 ... Hydraulic line, 55 ... Hydraulic line, 56 ... Hydraulic oil tank, 57 ... Hydraulic lock cylinder, 58 ... Pressure oil chamber, 59 ... Piston, 60 ... Pressure oil chamber, 61 ...Support, 62
... Tapered counterbore part, 63 ... Travel reducer, 6
4...Traveling reducer, 65...Sprocket drive wheel, 66...Sprocket drive wheel, 67...Crawler track,
68...Crawler track, 69...Upper rotating body frame, 7
0...Hydraulic line, 71...Hydraulic line, 72...
...Hydraulic line, 73...Hydraulic line, 74...Hydraulic line, 75...Work machine, 76...Idle wheel, 7
7... Driver's seat, 78... Upper rotating body, 79... Swinging bearing, 80... Drive wheel, 81... Lower traveling body, 82... Track, 83... Lower traveling body frame, 84... Travel deceleration Machine, 85...Hydraulic travel motor, 86...Swivel bearing inner race, 87
... Swivel bearing outer race, 88 ... Swivel bearing ball, 89 ... Inner race internal teeth,
90... Upper swing body frame, 91... Swing reducer, 92... Swing motor, 93... Lock cylinder, 94... Release hydraulic line, 95... Lock hydraulic line, 96... Hydraulic pilot valve,
97...Swivel bearing lock operation valve, 98
...Traveling speed high/low two-speed switching valve, 99...Moment clearance, 100...Thrust clearance, 101
...Radial gap, 102...Ball.

Claims

[Claims for Utility Model Registration] 1. Consisting of an upper rotating body, a lower traveling body, and a working machine, the upper rotating body is connected to the upper rotating body on the lower traveling body via a swing bearing between the upper rotating body and the lower traveling body. Safety during high-speed travel of a hydraulic excavator, which incorporates a hydraulic system that allows the excavator to rotate and switches the hydraulic travel motor to a high speed stage only when the locking device of the swivel bearing is in the locked state. Traveling device. 2. A hydraulic excavator according to claim 1 as a utility model having a slewing bearing locking device priority circuit configured to place the swiveling bearing locking device in a locked state while giving priority to setting the hydraulic motor in a high speed running state. Safety driving equipment. 3. A slewing bearing lock operation valve that controls the slewing bearing lock device and a capacity of the traveling hydraulic pressure variable motor are switched to two high and low stages, and a two-speed high and low traveling speed switching valve that controls the traveling speed of the aircraft is connected in a series circuit, and the above-mentioned A safe running device for a hydraulic excavator at high speed according to claim 1, wherein a high/low running speed switching valve is disposed on the downstream side. 4. The inner race of the swing bearing, which is composed of an inner race, an outer race, and dozens of bearing rollers such as balls interposed between both races, is connected to the lower traveling body frame, and the outer race is attached to the upper rotating body frame. A safety running device for a hydraulic excavator during high-speed running according to claim 1, which is a combination of the above-mentioned utility model claims. 5 A swing reducer is attached to the upper rotating body frame, and the output pinion of the swing reducer and the inner teeth of the inner race of the swing bearing that mesh with the gear can be driven by a hydraulic swing motor, thereby connecting the upper rotating body to the lower traveling body. A safe running device for a hydraulic excavator during high-speed running according to claim 1, which is capable of rotating 360 degrees. 6 The hydraulic excavator has a transmission device that can manually change the traveling speed between high and low speeds in two stages or multiple stages, and the swing bearing is damaged by undesirable external forces such as vibrations and shocks that the hydraulic excavator receives when traveling at high speed. 1. A safe running device for a hydraulic excavator at high speeds according to claim 1, which is fixed by a locking device of a swing bearing to prevent rattling of the swing bearing. 7 A swing bearing lock operation valve that controls the swing bearing lock device and a running speed high/low two-speed switching valve that switches the capacity of the travel hydraulic variable capacity motor to two high and low stages and controls the traveling speed of the aircraft in a series circuit, and The circuit is characterized by a high/low 2-speed switching valve placed on the downstream side, and the slewing bearing lock device is locked and the slewing bearing looseness is eliminated. A safe running device for a hydraulic excavator at high speeds according to claim 1, which enables high speed running only when protected from damage caused by shocks and shocks. 8 The swing bearing lock device can be controlled by a swing bearing lock operation valve using a lever type 4 port 2 position switching valve, and the running speed of the aircraft is controlled by a high/low 2 speed switching valve using a lever type 3 port 2 position switching valve. 1. A safe running device for a hydraulic excavator at high speed according to claim 1 of the utility model registration, which is configured to enable the system to run at high speed. 9 A swing bearing lock operating valve with a lever type 4-port 2-position switching valve and a traveling speed high/low 2-speed switching valve with a lever-type 3-port 2-position switching valve are connected in a series circuit, and the traveling speed high/low 2-speed switching valve is placed on the downstream side. A safe running device for a hydraulic excavator at high speed according to claim 1 of the utility model registration, which comprises: