JPS628227Y2 - - Google Patents
Info
- Publication number
- JPS628227Y2 JPS628227Y2 JP1982114828U JP11482882U JPS628227Y2 JP S628227 Y2 JPS628227 Y2 JP S628227Y2 JP 1982114828 U JP1982114828 U JP 1982114828U JP 11482882 U JP11482882 U JP 11482882U JP S628227 Y2 JPS628227 Y2 JP S628227Y2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- cylinder
- cab
- hydraulic chamber
- lock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Landscapes
- Actuator (AREA)
Description
【考案の詳細な説明】
本案はキヤブチルト装置用油圧回路の改良に関
するものである。[Detailed Description of the Invention] The present invention relates to an improvement of a hydraulic circuit for a cab tilt device.
キヤブのロツク解放用油圧シリンダは車両のレ
イアウト上、キヤブのチルト用パワーシリンダよ
りも上方に設置しなければならないが、従来は第
１図に示すように油圧ポンプ（図示せず）からキ
ヤブのチルト用パワーシリンダａへ延びた圧油供
給回路ｂの途中から分岐した分岐回路b′を介して
油圧ポンプとキヤブのロツク解放用油圧シリンダ
ｃとを接続しており、同キヤブのロツク解放用油
圧シリンダｃにエアブリーザを設けないと、同油
圧シリンダの系統からエアを抜くことができない
という問題があつた。 Due to the layout of the vehicle, the hydraulic cylinder for releasing the cab lock must be installed above the power cylinder for tilting the cab, but conventionally, as shown in Fig. The hydraulic pump and the hydraulic cylinder c for releasing the lock of the cab are connected through a branch circuit b' branched from the middle of the pressure oil supply circuit b extending to the power cylinder a for the engine. There was a problem in that air could not be removed from the hydraulic cylinder system unless an air breather was installed in c.
本案は前記の問題点に対処するもので、車両の
フレームに回動可能に設けられたキヤブを上下傾
動させるエアブリーザ機能を備えたチルト用パワ
ーシリンダ、上記キヤブを上記フレームに係止す
るロツク装置、同ロツク装置を解放するロツク解
放用油圧シリンダ、油圧ポンプと上記ロツク解放
用油圧シリンダのピストン作動用油圧室とを連通
する油路、及び同ロツク解放用油圧シリンダのピ
ストン作動用油圧室と上記チルト用パワーシリン
ダのピストン作動用油圧室とを連通する油路とを
有し、上記油圧ポンプからの油圧が上記ロツク解
放用油圧シリンダのピストン作動用油圧室を介し
て上記チルト用パワーシリンダのピストン作動用
油圧室へ供給されるように構成されていることを
特徴としたキヤブチルト装置用油圧回路に係り、
その目的とする処は、キヤブのロツク解放用油圧
シリンダにエアブリザを設けなくても同油圧シリ
ンダからエアを抜くことができる改良されたキヤ
ブチルト装置用油圧回路を供する点にある。 The present invention addresses the above-mentioned problems, and includes: a power cylinder for tilting equipped with an air breather function that tilts up and down a cab rotatably mounted on a vehicle frame; a locking device that locks the cab to the frame; A hydraulic cylinder for lock release that releases the lock device, an oil passage that communicates the hydraulic pump with the hydraulic chamber for operating the piston of the hydraulic cylinder for lock release, and a hydraulic chamber for operating the piston of the hydraulic cylinder for lock release and the above-mentioned tilt. and an oil passage communicating with a piston operating hydraulic chamber of the power cylinder for tilting, and hydraulic pressure from the hydraulic pump operates the piston of the tilting power cylinder via the hydraulic chamber for piston operating of the lock release hydraulic cylinder. The present invention relates to a hydraulic circuit for a cab tilt device, characterized in that the hydraulic circuit is configured to be supplied to a hydraulic chamber for use in a vehicle,
The object of the present invention is to provide an improved hydraulic circuit for a cab tilt device that can bleed air from the cab lock release hydraulic cylinder without having to provide an air breather to the hydraulic cylinder.
次に本案のキヤブチルト装置用油圧回路を第
２，３，４図に示す一実施例により説明すると、
第２図の１がシヤシー・フレームのサイドメンバ
ー、２が同サイドメンバー１に軸３を中心とした
上下方向への傾動を可能に取付けたキヤブ、４が
同キヤブ２のチルト用パワーシリンダ、５が左右
のサイドメンバー１に立設した支柱、６が同各支
柱の上端部を連結する水平のフローテイングバ
ー、７が同フローテイングバー６上に設けたロツ
ク・解放装置で、これを具体的に説明すると、８
がフローテイングバー６上に立設したフレーム、
９が同フレーム８に軸１０を介して枢着したロツ
ク片、１１が上記フレーム８に軸１２を介し枢着
した係合片、１３が上記フレーム８に固定した油
圧シリンダ、１４がそのピストン、１３′が同油
圧シリンダ１３に固定したブラケツト、１５が同
ブラケツト１３′と上記係合片１１との間に設け
たリターンスプリング（引張りスプリング）で、
係合片１１が軸１２を中心に反時計方向に回転す
るように付勢されている。また１６が上記油圧シ
リンダ１３による係合片１１の解放方向への回転
を所定の範囲に規制するフローテイングバー６側
のストツパで、第３図のロツク状態から油圧シリ
ンダ１３を伸長方向に作動させて、ピストン１４
及びロツド１４ａを下降させると、係合片１１が
リターンスプリング１５に抗し軸１２を中心に時
計方向に、ストツパ１６に当接するまで回転し
て、係合片１１の先端がロツク片９の先端から離
れ、ロツク片９及びキヤブ２のストライカ２ａが
解放されて、キヤブ２のチルト用パワーシリンダ
４による軸３を中心とした上方への傾動が可能に
なる。またキヤブ２をチルト用パワーシリンダ４
により下方へ傾動させると、キヤブ２のストライ
カ２ａがロツク片９に当接し、ロツク片９が軸１
０を中心に時計方向に回転して、ストライカ２ａ
を抱持するとともにロツク片９の先端が係合片１
１の先端に係合して、ストライカ２ａが抱持位置
に保持されるようになつている。次に前記キヤブ
チルト装置の油圧回路を第４図により説明する
と、１７が電動機、１８が同電動機１７により駆
動される油圧ポンプ、１８′が手動の油圧ポン
プ、１９が同電動ボンプ１８から手動切換弁２１
へ延びた高圧回路、２０が同手動切換弁２１から
タンク２４へ延びた低圧回路、２２が同手動切換
弁２１から前記キヤブのロツク解放用油圧シリン
ダ１３のピストン作動用油圧室を経て前記キヤブ
のチルト用パワーシリンダ４のピストン作動用油
圧室へ延びたピストン側回路、２３が同手動切換
弁２１から上記チルト用パワーシリンダ４のロツ
ドロツド側油圧室へ延びたロツド側回路、２５が
上記高圧回転１９と上記低圧回路２０とを結ぶ配
管に設けたリリーフ弁、２６が前記チルト用パワ
ーシリンダ４のピストン作動用油圧室に設けたエ
アブリーザで、手動切換弁２１を中立位置から矢
印Ａ方向に操作したのち、チルトスイツチ（図示
せず）を押すと、電動機１７が起動し、油圧ポン
プ１８が同電動機１７により駆動され、圧油が高
圧回路１９手動切換弁２１ピストン側回路２２を
介しロツク解放用シリンダ１３のピストン作動用
油圧室へ送られ、同油圧シリンダ１３が伸長方向
に作動し、係合片１１がロツク片９から外れて、
同ロツク片９とキヤブ２のストライカ２ａとが自
由になる。また上記圧油が油圧シリンダ１３下流
側のピストン側回路２２を介しチルト用パワーシ
リンダ４のピストン作動用油圧室へ送られるとと
もに同パワーシリンダ４のロツド側油圧室の油が
ロツド側回路２３手動切換弁２１低圧回路２０を
介しタンク２４へ排出され、同パワーシリンダ４
が伸長方向に作動して、キヤブ２が上方へ傾動す
る。またキヤブ２が上方への傾動を完了して電動
機１７が停止した状態から手動切換弁２１を矢印
Ｂ方向に操作したのち、チルトスイツチを押す
と、電動機１７が起動し、油圧ポンプ１８が同電
動機１７により駆動され、圧油が高圧回路１９手
動切換弁２１ロツド側回路２３を介しチルト用パ
ワーシリンダ４のロツド側油圧室へ送られるとと
もに同パワーシリンダ４のピストン作動用油圧室
の油及びロツク解放用油圧シリンダ１３のピスト
ン作動用油圧室の油がピストン側回路２２手動切
換弁２１低圧回路２０を介しタンク２４へ排出さ
れ、同パワーシリンダ４が縮み方向に作動してキ
ヤブ２が下方へ傾動し、それが終る時点ではキヤ
ブ２のストライカ２ａがロツク片９に当接して、
同ロツク片９が回転し、係合片１１に係合して、
キヤブ２のストライカ２ａがロツク片９により抱
持されるようになつている。 Next, the hydraulic circuit for the cab tilt device of the present invention will be explained with reference to an embodiment shown in FIGS. 2, 3, and 4.
In Fig. 2, 1 is a side member of the chassis frame, 2 is a cab attached to the same side member 1 so that it can tilt vertically around the axis 3, 4 is a power cylinder for tilting the same cab 2, 5 is a column installed upright on the left and right side members 1, 6 is a horizontal floating bar connecting the upper ends of each column, and 7 is a lock/release device installed on the floating bar 6. To explain, 8
is a frame set up on the floating bar 6,
9 is a lock piece pivotally connected to the frame 8 via a shaft 10; 11 is an engagement piece pivotally connected to the frame 8 via a shaft 12; 13 is a hydraulic cylinder fixed to the frame 8; 14 is its piston; 13' is a bracket fixed to the hydraulic cylinder 13, 15 is a return spring (tension spring) provided between the bracket 13' and the engagement piece 11,
The engagement piece 11 is urged to rotate counterclockwise about the shaft 12. Reference numeral 16 designates a stopper on the floating bar 6 side that restricts the rotation of the engagement piece 11 in the release direction by the hydraulic cylinder 13 within a predetermined range, and operates the hydraulic cylinder 13 in the extension direction from the locked state shown in FIG. So, piston 14
When the rod 14a is lowered, the engagement piece 11 rotates clockwise around the shaft 12 against the return spring 15 until it abuts against the stopper 16, and the tip of the engagement piece 11 touches the tip of the lock piece 9. The lock piece 9 and the striker 2a of the cab 2 are released, and the cab 2 can be tilted upward about the shaft 3 by the tilting power cylinder 4. In addition, power cylinder 4 for tilting cab 2
When tilted downward by
Rotate clockwise around 0, striker 2a
while holding the locking piece 9, the tip of the locking piece 9 touches the engaging piece 1.
The striker 2a is held in the holding position by being engaged with the tip of the striker 2a. Next, the hydraulic circuit of the cab tilt device will be explained with reference to FIG. 4. 17 is an electric motor, 18 is a hydraulic pump driven by the electric motor 17, 18' is a manual hydraulic pump, and 19 is a manual switching valve from the electric pump 18. 21
20 is a low pressure circuit extending from the manual switching valve 21 to the tank 24, and 22 is a low pressure circuit extending from the manual switching valve 21 to the piston operating hydraulic chamber of the hydraulic cylinder 13 for releasing the lock of the cab. 23 is a piston side circuit extending to the piston operating hydraulic chamber of the tilting power cylinder 4; 23 is a rod side circuit extending from the manual switching valve 21 to the rod rod side hydraulic chamber of the tilting power cylinder 4; 25 is the high pressure rotation 19 After operating the manual switching valve 21 in the direction of arrow A from the neutral position using a relief valve 26 provided in the piping connecting the power cylinder 4 for tilting and the low pressure circuit 20, the air breather 26 is provided in the hydraulic chamber for piston operation of the power cylinder 4 for tilting. , when the tilt switch (not shown) is pressed, the electric motor 17 is started, the hydraulic pump 18 is driven by the electric motor 17, and the pressure oil is supplied to the lock release cylinder 13 via the high pressure circuit 19 manual switching valve 21 piston side circuit 22. The hydraulic cylinder 13 is actuated in the extension direction, and the engagement piece 11 is disengaged from the lock piece 9.
The lock piece 9 and the striker 2a of the cab 2 become free. Further, the pressure oil is sent to the piston operating hydraulic chamber of the tilting power cylinder 4 via the piston side circuit 22 on the downstream side of the hydraulic cylinder 13, and the oil in the rod side hydraulic chamber of the power cylinder 4 is transferred to the rod side circuit 23 by manual switching. The valve 21 is discharged to the tank 24 via the low pressure circuit 20, and the power cylinder 4
operates in the extension direction, causing the cab 2 to tilt upward. Further, when the cab 2 completes upward tilting and the electric motor 17 is stopped, operate the manual switching valve 21 in the direction of arrow B, and then press the tilt switch to start the electric motor 17 and switch the hydraulic pump 18 to the electric motor 17. 17, pressurized oil is sent to the rod side hydraulic chamber of the tilting power cylinder 4 through the high pressure circuit 19, manual switching valve 21, and rod side circuit 23, and oil in the piston operating hydraulic chamber of the power cylinder 4 and lock release. The oil in the piston operating hydraulic chamber of the power hydraulic cylinder 13 is discharged to the tank 24 via the piston side circuit 22, manual switching valve 21, and low pressure circuit 20, and the power cylinder 4 operates in the retracting direction, causing the cab 2 to tilt downward. , at the end of this, the striker 2a of the cab 2 comes into contact with the locking piece 9,
The lock piece 9 rotates and engages with the engagement piece 11,
A striker 2a of the cab 2 is held by a lock piece 9.
前記キヤブ２のロツク解放用油圧シリンダ１３
は車両のレイアウト上、チルト用パワーシリンダ
４よりも上方に設置する必要があり、エア抜きを
必要としているが、本案のキヤブチルト装置用油
圧回路は前記のように車両のフレーム８に回動可
能に設けられたキヤブ２を上下傾動させるエアブ
リーザ機能を備えたチルト用パワーシリンダ４、
キヤブ２をフレーム８に係止するロツク装置９，
１０、同ロツク装置９，１０を解放するロツク解
放用油圧シリンダ１３、油圧ポンプ１８とロツク
解放用油圧シリンダ１３のピストン作動用油圧室
とを連通する油路１９，２２、及び同ロツク解放
用油圧シリンダ１３のピストン作動用油圧室とチ
ルト用パワーシリンダ４のピストン作動用油圧室
とを連通する油路２２とを有し、油圧ポンプ１８
からの油圧がロツク解放用油圧シリンダ１３のピ
ストン作動用油圧室を介してチルト用パワーシリ
ンダ４のピストン作動用油圧室へ供給されるよう
に構成されており、ロツク解放用油圧シリンダ１
３にエアブリーザを設けなくても、同ロツク解放
用油圧シリンダ１３からエア抜きを行なえる効果
がある。 Hydraulic cylinder 13 for unlocking the cab 2
Due to the layout of the vehicle, it is necessary to install it above the tilting power cylinder 4, and air bleed is required, but the hydraulic circuit for the cab tilting device of this proposal can be rotated on the vehicle frame 8 as described above. a tilting power cylinder 4 equipped with an air breather function that tilts the provided cab 2 up and down;
a locking device 9 for locking the cab 2 to the frame 8;
10, a lock release hydraulic cylinder 13 that releases the lock devices 9 and 10, oil passages 19 and 22 that communicate the hydraulic pump 18 and the piston operating hydraulic chamber of the lock release hydraulic cylinder 13, and the lock release hydraulic pressure. The hydraulic pump 18 has an oil passage 22 that communicates the piston operating hydraulic chamber of the cylinder 13 with the piston operating hydraulic chamber of the tilt power cylinder 4.
The hydraulic pressure from the lock releasing hydraulic cylinder 13 is supplied to the piston operating hydraulic chamber of the tilting power cylinder 4 through the piston operating hydraulic chamber of the lock releasing hydraulic cylinder 1.
There is an effect that air can be bleed from the lock release hydraulic cylinder 13 without providing an air breather to the lock release hydraulic cylinder 13.
第５図は、ロツク解放用油圧シリンダ１３のピ
ストン作動用油圧室を手動切換弁２１からチルト
用パワーシリンダ４のピストン側へ延びたピスト
ン作動用油圧室回路２２の途中に直接介装する一
方、チルト用パワーシリンダ４にピストンロツド
が所定の距離前進する間はピストン作動用油圧室
４ａとロツド側油圧室４ｂとが連通する２b′参
照）パワーシリンダを使用した他の実施例で、こ
の場合にはロツク解放用油圧シリンダ１３のエア
がチルトシリンダ４のピストン作動用油圧室４ａ
ロツド側油圧室４ｂロツド側回路２３手動切換弁
２１低圧回路２０を介して大気側のタンク２４へ
排出される。この場合にもロツク解放用油圧シリ
ンダ１３にエアブリーザを設ける必要がない。 FIG. 5 shows that the piston operating hydraulic chamber of the lock releasing hydraulic cylinder 13 is directly interposed in the middle of the piston operating hydraulic chamber circuit 22 extending from the manual switching valve 21 to the piston side of the tilting power cylinder 4. While the piston rod moves forward a predetermined distance in the tilting power cylinder 4, the piston operating hydraulic chamber 4a and the rod-side hydraulic chamber 4b communicate with each other (see 2b'). The air in the lock release hydraulic cylinder 13 is supplied to the piston operating hydraulic chamber 4a of the tilt cylinder 4.
The rod side hydraulic chamber 4b is discharged to the atmosphere side tank 24 via the rod side circuit 23, manual switching valve 21, and low pressure circuit 20. In this case as well, there is no need to provide an air breather in the lock release hydraulic cylinder 13.
第１図は従来のキヤブチルト装置用油圧回路を
示す回路図、第２図はキヤブチルト装置の概様を
示す側面図、第３図はキヤブのロツク解放装置を
示す一部縦断側面図、第４図は本案に係るキヤブ
チルト装置用油圧回路の一実施例を示す回路図、
第５図は他の実施例を示す回路図である。
２……キヤブ、４……チルト用パワーシリン
ダ、８……フレーム、９，１０……ロツク装置、
１３……ロツク解放用油圧シリンダ、１８……油
圧ポンプ、１９，２２……油圧ポンプ１８とロツ
ク解放用油圧シリンダ１３のピストン作動用油圧
室とを連通する油路、２２……ロツク解放用油圧
シリンダ１３のピストン作動用油圧室とチルト用
パワーシリンダ４のピストン作動用油圧室とを連
通する油路。
Fig. 1 is a circuit diagram showing a conventional hydraulic circuit for a cab tilt device, Fig. 2 is a side view showing an overview of the cab tilt device, Fig. 3 is a partially longitudinal side view showing a cab lock release device, and Fig. 4 is a circuit diagram showing an example of a hydraulic circuit for a cab tilt device according to the present invention,
FIG. 5 is a circuit diagram showing another embodiment. 2... Cab, 4... Tilt power cylinder, 8... Frame, 9, 10... Lock device,
13...Hydraulic cylinder for lock release, 18...Hydraulic pump, 19, 22...Oil passage communicating the hydraulic pump 18 and the hydraulic chamber for piston operation of the hydraulic cylinder 13 for lock release, 22...Hydraulic pressure for lock release An oil passage that communicates the piston operating hydraulic chamber of the cylinder 13 with the piston operating hydraulic chamber of the tilt power cylinder 4.
Claims (1)
を上下傾動させるエアブリーザ機能を備えたチル
ト用パワーシリンダ、上記キヤブを上記フレーム
に係止するロツク装置、同ロツク装置を解放する
ロツク解放用油圧シリンダ、油圧ポンプと上記ロ
ツク解放用油圧シリンダのピストン作動用油圧室
とを連通する油路、及び同ロツク解放用油圧シリ
ンダのピストン作動用油圧室と上記チルト用パワ
ーシリンダのピストン作動用油圧室とを連通する
油路とを有し、上記油圧ポンプからの油圧が上記
ロツク解放用油圧シリンダのピストン作動用油圧
室を介して上記チルト用パワーシリンダのピスト
ン作動用油圧室へ供給されるように構成されてい
ることを特徴としたキヤブチルト装置用油圧回
路。 A tilting power cylinder equipped with an air breather function for vertically tilting a cab rotatably mounted on a vehicle frame; a locking device for locking the cab to the frame; a lock release hydraulic cylinder for releasing the locking device; An oil passage that communicates the hydraulic pump with the piston operating hydraulic chamber of the lock releasing hydraulic cylinder, and communicates the piston operating hydraulic chamber of the lock releasing hydraulic cylinder with the piston operating hydraulic chamber of the tilting power cylinder. the hydraulic pressure from the hydraulic pump is supplied to the piston operating hydraulic chamber of the tilting power cylinder via the piston operating hydraulic chamber of the lock release hydraulic cylinder. A hydraulic circuit for a cab tilt device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11482882U JPS5919477U (en) | 1982-07-30 | 1982-07-30 | Hydraulic circuit for cab tilt device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11482882U JPS5919477U (en) | 1982-07-30 | 1982-07-30 | Hydraulic circuit for cab tilt device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5919477U JPS5919477U (en) | 1984-02-06 |
| JPS628227Y2 true JPS628227Y2 (en) | 1987-02-25 |
Family
ID=30265285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11482882U Granted JPS5919477U (en) | 1982-07-30 | 1982-07-30 | Hydraulic circuit for cab tilt device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5919477U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021133696A (en) * | 2020-02-21 | 2021-09-13 | 日野自動車株式会社 | Cab lock system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5312289A (en) * | 1976-07-20 | 1978-02-03 | Matsushita Electric Ind Co Ltd | Production of semiconductor device |
-
1982
- 1982-07-30 JP JP11482882U patent/JPS5919477U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5312289A (en) * | 1976-07-20 | 1978-02-03 | Matsushita Electric Ind Co Ltd | Production of semiconductor device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5919477U (en) | 1984-02-06 |
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