JPH0140742Y2 - - Google Patents
Info
- Publication number
- JPH0140742Y2 JPH0140742Y2 JP9885684U JP9885684U JPH0140742Y2 JP H0140742 Y2 JPH0140742 Y2 JP H0140742Y2 JP 9885684 U JP9885684 U JP 9885684U JP 9885684 U JP9885684 U JP 9885684U JP H0140742 Y2 JPH0140742 Y2 JP H0140742Y2
- Authority
- JP
- Japan
- Prior art keywords
- spool
- hydraulic
- clutch
- oil passage
- insertion hole
- 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
- 239000007788 liquid Substances 0.000 claims description 19
- 230000037431 insertion Effects 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
Landscapes
- Arrangement And Driving Of Transmission Devices (AREA)
- Sliding Valves (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、油圧ブレーキと油圧クラツチとを備
えた例えばトラクタにおいて、前記ブレーキとク
ラツチとをそれぞれ制御する油圧制御弁機構に関
する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a hydraulic control valve mechanism for controlling the brake and the clutch, respectively, in a tractor equipped with a hydraulic brake and a hydraulic clutch, for example.
（従来の技術）
例えば、実公昭56−44574号公報で開示されて
いるように、トラクタのPTO軸駆動系中に油圧
クラツチを介装し、この油圧クラツチを制御弁の
切換操作で断接するようにしたものがある。(Prior art) For example, as disclosed in Japanese Utility Model Publication No. 56-44574, a hydraulic clutch is installed in the PTO shaft drive system of a tractor, and the hydraulic clutch is connected and disconnected by switching a control valve. There is something I did.
（考案が解決しようとする問題点）
従来の制御弁機構はON−OFFのスプールを摺
動させることにより油圧約13Kg／cm2のONと油圧
０Kg／cm2のOFFの２つの状態に切換えるもので
あり、所謂クラツチの半クラツチ状態（油圧１〜
５Kg／cm2）の維持が困難であつた。(Problem that the invention aims to solve) The conventional control valve mechanism switches between two states: ON with a hydraulic pressure of approximately 13 kg/cm 2 and OFF with a hydraulic pressure of 0 kg/cm 2 by sliding an ON-OFF spool. , the so-called half-clutch state of the clutch (hydraulic pressure 1~
5Kg/cm 2 ) was difficult to maintain.
従つて、PTO接続時にはエンジン回転をアイ
ドリングにしてからPTO接続を行なう必要があ
り、操作が面倒であつた。 Therefore, when connecting the PTO, it is necessary to set the engine rotation to idling before connecting the PTO, which is cumbersome to operate.
又、エンジン回転が最大といつた状態では、い
かにPTO油圧クラツチをゆつくりと接続しても
作業機にかなりの衝撃がかかり安全用のシヤーピ
ンがとぶといつたこともあつた。 Also, when the engine was running at maximum speed, no matter how slowly I connected the PTO hydraulic clutch, the work equipment received a considerable impact and the safety shear pin sometimes flew off.
本考案は、スプールのバルブ部にゆるやかなテ
ーパー面を形成することによつて、半クラツチを
確保せしめて前述問題点をなくすことを目的とす
る。 The object of the present invention is to form a gently tapered surface on the valve portion of the spool to ensure a half-clutch, thereby eliminating the above-mentioned problems.
（問題を解決するための手段）
前述の問題点を解決せんための技術的手段はポ
ンプに連通された送液油路３、該油路３に連通さ
れた油圧ブレーキ用及び油圧クラツチ用の各送液
油路７，９、とがバルブ本体１に形成されてお
り、該バルブ本体１のスプール挿通孔６に、前記
ブレーキ及びクラツチへの送液油路７，９をそれ
ぞれ制御するバルブ部１３，１４を有するスプー
ル１０が摺動自在に挿嵌された油圧制御弁機構で
あつて、
前記スプール１０の油圧クラツチ側への送液油
路７を制御するバルブ部１４にクラツチ接続方向
に対して徐々に絞り量を大きくするテーパー面１
８が形成されている点にある。(Means for Solving the Problem) The technical means for solving the above-mentioned problem is to provide a liquid supply oil passage 3 connected to the pump, and a hydraulic brake and hydraulic clutch connected to the oil passage 3. Liquid feeding oil passages 7 and 9 are formed in the valve body 1, and a valve portion 13 is provided in the spool insertion hole 6 of the valve body 1 to control the liquid feeding oil passages 7 and 9 to the brake and clutch, respectively. , 14 is slidably inserted into the hydraulic control valve mechanism, and the valve part 14 for controlling the liquid supply oil path 7 of the spool 10 toward the hydraulic clutch side is provided with a spool 10 with respect to the clutch connection direction. Tapered surface 1 that gradually increases the amount of aperture
It is at the point where the number 8 is formed.
（作用）
従つて、本考案にあつては、第４図で示す如く
スプール１０の全ストロークにおいて、リリーフ
圧にて油圧ブレーキを作動させ、これから油圧ク
ラツチを接続するに、そのスプール変位の中間に
半クラツチ位置を確保してから油圧クラツチを接
続するようにされる。(Function) Therefore, in the present invention, the hydraulic brake is operated with relief pressure during the entire stroke of the spool 10 as shown in FIG. After securing the half-clutch position, the hydraulic clutch is connected.
従つて、作業機の起動トルクは千差万別である
が１〜５Kg／cm2といつた範囲で任意の圧力の確保
ができて、エンジン回転、作業機に関係なくスム
ーズで衝撃の少ない下でのPTOの接続ができる。 Therefore, although the starting torque of work equipment varies widely, it is possible to secure any pressure within the range of 1 to 5 kg/ cm2 , and it is possible to achieve a smooth and low-impact operation regardless of engine rotation or work equipment. PTO connection is possible.
（実施例）
図面を参照して本考案の実施例を詳述すると、
第１図と第２図において、図外の油圧クラツチと
第５図で一部を示した油圧ブレーキ（慣性空転防
止用）とを制御する油圧制御機構のバルブ本体１
は例えば図外のトラクタ車体の外上面等にボルト
２等を介して取付けられる。(Example) An example of the present invention will be described in detail with reference to the drawings.
1 and 2, a valve body 1 of a hydraulic control mechanism that controls a hydraulic clutch (not shown) and a hydraulic brake (for preventing inertial slippage), a part of which is shown in FIG.
is attached to, for example, the outer upper surface of a tractor body (not shown) via bolts 2 or the like.
バルブ本体１には図外の油圧ポンプに連通され
る送液油路３が形成され、該送液油路３にはリリ
ーフ弁機構４と絞り弁５とが備えられている。 A liquid feeding oil passage 3 is formed in the valve body 1 and communicated with a hydraulic pump (not shown), and the liquid feeding oil passage 3 is equipped with a relief valve mechanism 4 and a throttle valve 5.
前記送液油路３にはスプール挿通孔６が油路３
と直交して形成され、更に、油路３を挾んで両側
には油圧クラツチに対する送液油路７と油圧ブレ
ーキのピストン８に対する送液油路９とがそれぞ
れスプール挿通孔６に連通して形成してある。 A spool insertion hole 6 is provided in the liquid sending oil passage 3.
Further, on both sides of the oil passage 3, a liquid supply oil passage 7 for the hydraulic clutch and a liquid supply oil passage 9 for the piston 8 of the hydraulic brake are formed to communicate with the spool insertion hole 6, respectively. It has been done.
スプール挿通孔６にはスプール１０が摺動自在
に挿嵌されており、該スプール１０はその軸長両
端部にスプール挿通孔６に密接嵌合する案内部１
１，１２が形成され、該案内部１１，１２の間に
は送液油路９を制御するバルブ部１３と、送液油
路７を制御するバルブ部１４と、がそれぞれ軸方
向間隔をおいて形成してある。 A spool 10 is slidably inserted into the spool insertion hole 6, and the spool 10 has guide portions 1 at both ends of its axial length that are closely fitted into the spool insertion hole 6.
1 and 12 are formed, and between the guide parts 11 and 12, a valve part 13 for controlling the liquid sending oil passage 9 and a valve part 14 for controlling the liquid sending oil passage 7 are spaced apart from each other in the axial direction. It has been formed.
そして、バルブ部１４は第３図１，２で示す如
く平行部１５と、該平行部１５に僅少段差１６を
介して連設された第２平行部１７と該平行部１７
に例えば5゜±30゜の角度で連設されたテーパー面
１８とを備えて構成され、テーパー面１８は送液
油路７における逃げ部１９を徐々に絞り効果が大
きくなるようにして形成されている。 As shown in FIGS. 1 and 2, the valve portion 14 includes a parallel portion 15, a second parallel portion 17 connected to the parallel portion 15 via a slight step 16, and the parallel portion 17.
and a tapered surface 18 that is continuous at an angle of, for example, 5°±30°, and the tapered surface 18 is formed so that the effect of squeezing the relief portion 19 in the liquid sending oil passage 7 gradually increases. ing.
その他、２０は油圧ピストン側のドレン孔、２
１はクラツチ側のドレン孔を示している。 In addition, 20 is a drain hole on the hydraulic piston side, 2
1 indicates the drain hole on the clutch side.
また、２２はスイツチで、バルブ本体１にネジ
で取付けられており、そのスイツチ作動子２３は
スプールの案内部１１に形成された凹周溝１１Ａ
に対応しており、第６図で示す如くスプール１０
が作動されて半クラツチ状態となると、スプリン
グ２３Ａに抗してスイツチ作動子２３が押込まれ
てオペレータにスイツチ２２を介して半クラツチ
状態を報知するようにされている。 Further, 22 is a switch, which is attached to the valve body 1 with a screw, and the switch actuator 23 is connected to a concave circumferential groove 11A formed in the guide portion 11 of the spool.
As shown in Fig. 6, the spool 10
When the clutch is actuated to become a half-clutched state, the switch actuator 23 is pushed against the spring 23A, and the operator is notified of the half-clutched state via the switch 22.
２４はスプール押込み制限用ストツパ、２５は
スプール引込み制限用シールリング、２６は油圧
ピストン８の押え板である。 24 is a stopper for limiting the spool push-in, 25 is a seal ring for limiting the spool retraction, and 26 is a presser plate for the hydraulic piston 8.
（考案の効果）
本考案は、スプール１０を第１図の油圧ブレー
キ８Ａのピストン８を作用させている状態から、
矢印方向に摺動させて該油圧ブレーキ８Ａを
OFFにしてから油圧クラツチを介してPTO系を
接続するに、スプール１０は第３図１から第３図
２の状態を経由してバルブ部１４で逃げ部１９を
完全に閉じるのであるが、このとき、バルブ部１
４にはテーパー面１８が形成されて絞り量を徐々
に大きくしていることから、油圧クラツチは徐々
にクラツチONとなり、ここに、半クラツチ状態
を得ることができる。(Effects of the invention) The present invention can change the spool 10 from the state in which the piston 8 of the hydraulic brake 8A shown in FIG.
Slide the hydraulic brake 8A in the direction of the arrow.
When the PTO system is connected via the hydraulic clutch after turning OFF, the spool 10 goes through the states shown in FIG. 31 to FIG. 32, and the valve part 14 completely closes the relief part 19. When, valve part 1
4 is formed with a tapered surface 18 to gradually increase the amount of throttle, so that the hydraulic clutch is gradually turned on, and a half-clutch state can be obtained here.
従つて、油圧制御機構をPTO駆動系に設けた
とき、作業機の起動トルクは千差万別であるが、
１〜５Kg／cm2といつた範囲で任意の圧力の任意の
圧力の確保ができることとなり、エンジン回転
数、作業機に関係なくスムーズなPTOの接続が
できる。 Therefore, when a hydraulic control mechanism is installed in the PTO drive system, the starting torque of the work equipment varies widely;
This makes it possible to secure any pressure within the range of 1 to 5 kg/cm 2 , allowing smooth PTO connection regardless of engine speed or work equipment.
図面は本考案の実施例を示し、第１図は油圧ブ
レーキ作動中の断面図、第２図は油圧クラツチ
ON時の断面図、第３図１は第１図Ａ部拡大断面
図、第３図２は第２図Ａ部における半クラツチ状
態時の断面図、第４図はスプール変位と油圧との
関係を示すグラフ、第５図は油圧ピストンの拡大
断面図、第６図は第１図Ｂ−Ｂ線の断面図であ
る。
１……バルブ本体、３……ポンプ側送液油路、
６……スプール挿通孔、７……クラツチ側送液油
路、９……ブレーキ側送液油路、１０……スプー
ル、１３，１４……バルブ部、１８……テーパー
面。
The drawings show an embodiment of the invention, with Fig. 1 being a sectional view of the hydraulic brake in operation, and Fig. 2 showing the hydraulic clutch in operation.
3.1 is an enlarged sectional view of section A in FIG. 1. FIG. 3.2 is a sectional view of section A in FIG. 2 when the clutch is in a half-clutch state. FIG. 5 is an enlarged sectional view of the hydraulic piston, and FIG. 6 is a sectional view taken along line BB in FIG. 1. 1... Valve body, 3... Pump side liquid supply oil path,
6... Spool insertion hole, 7... Clutch side liquid feeding oil passage, 9... Brake side liquid feeding oil passage, 10... Spool, 13, 14... Valve portion, 18... Tapered surface.
Claims (1)
通されたスプール挿通孔６、該挿通孔６に連通さ
れた油圧ブレーキ用及び油圧クラツチ用の各送液
油路７，９、とがバルブ本体１に形成されてお
り、該バルブ本体１のスプール挿通孔６に、前記
ブレーキ及びクラツチへの送液油路７，９をそれ
ぞれ制御するバルブ部１３，１４を有するスプー
ル１０が摺動自在に挿嵌された油圧制御弁機構で
あつて、 前記スプール１０の油圧クラツチ側への送液油
路７を制御するバルブ部１４にクラツチ接続方向
に対して徐々に絞り量を大きくするテーパー面１
８が形成されていることを特徴とする油圧制御弁
機構。[Scope of Claim for Utility Model Registration] Liquid supply oil passage 3 communicating with the pump, spool insertion hole 6 communicating with the oil passage 3, and hydraulic brake and hydraulic clutch transmissions communicating with the insertion hole 6. Liquid oil passages 7, 9 are formed in the valve body 1, and a valve portion 13, which controls the liquid supply oil passages 7, 9 to the brake and clutch, respectively, is provided in the spool insertion hole 6 of the valve body 1. The hydraulic control valve mechanism is a hydraulic control valve mechanism in which a spool 10 having a spool 14 is slidably inserted, and a valve portion 14 that controls a liquid supply oil path 7 of the spool 10 toward a hydraulic clutch side is gradually inserted in a direction in which the clutch is connected. Tapered surface 1 that increases the amount of aperture
A hydraulic control valve mechanism characterized in that a number 8 is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9885684U JPS6112831U (en) | 1984-06-29 | 1984-06-29 | Hydraulic control valve mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9885684U JPS6112831U (en) | 1984-06-29 | 1984-06-29 | Hydraulic control valve mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6112831U JPS6112831U (en) | 1986-01-25 |
| JPH0140742Y2 true JPH0140742Y2 (en) | 1989-12-05 |
Family
ID=30658373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9885684U Granted JPS6112831U (en) | 1984-06-29 | 1984-06-29 | Hydraulic control valve mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6112831U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0740784Y2 (en) * | 1987-04-20 | 1995-09-20 | エヌオーケー株式会社 | Valve for pressure control |
| DE9012858U1 (en) * | 1990-09-10 | 1990-11-15 | Keiper Recaro GmbH & Co, 5630 Remscheid | Backrest for a vehicle seat, in particular a motor vehicle seat |
-
1984
- 1984-06-29 JP JP9885684U patent/JPS6112831U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6112831U (en) | 1986-01-25 |
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