JPH0726660B2 - Hydraulic shock absorber - Google Patents

Hydraulic shock absorber

Info

Publication number
JPH0726660B2
JPH0726660B2 JP199390A JP199390A JPH0726660B2 JP H0726660 B2 JPH0726660 B2 JP H0726660B2 JP 199390 A JP199390 A JP 199390A JP 199390 A JP199390 A JP 199390A JP H0726660 B2 JPH0726660 B2 JP H0726660B2
Authority
JP
Japan
Prior art keywords
seedling
piston
orifice
shock absorber
hydraulic shock
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 - Lifetime
Application number
JP199390A
Other languages
Japanese (ja)
Other versions
JPH03209032A (en
Inventor
寛 大坪
浩史 奥田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Original Assignee
Kubota Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kubota Corp filed Critical Kubota Corp
Priority to JP199390A priority Critical patent/JPH0726660B2/en
Publication of JPH03209032A publication Critical patent/JPH03209032A/en
Publication of JPH0726660B2 publication Critical patent/JPH0726660B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、シリンダケース内において、ピストンロッド
の押引きによって移動するピストンの両側に作動油を充
填した一対の油室を形成するとともに、前記ピストンに
前記各油室を連通するオリフィスを形成してある油圧式
緩衝装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention forms a pair of oil chambers filled with hydraulic oil on both sides of a piston that moves by pushing and pulling a piston rod in a cylinder case, and The present invention relates to a hydraulic shock absorber in which a piston is formed with an orifice communicating with each oil chamber.

〔従来の技術〕[Conventional technology]

上記油圧式緩衝装置において、従来では、前記オリフィ
スは機械加工によってピストンに貫通孔を穿設すること
で形成されるのが一般的であった。
In the above hydraulic shock absorber, conventionally, the orifice is generally formed by forming a through hole in a piston by machining.

〔発明が解決しようとする課題〕[Problems to be Solved by the Invention]

ところが、上記従来構造において、機械加工によるオリ
フィス孔の最小径は一定の限界があり、所望の油圧緩衝
特性を得るためにはシリンダケースの径を大きなものに
する必要がある場合があって、外形が大型化するという
弊害があった。又、上記したように固定径のオリフィス
であるため、油圧緩衝特性を変更調節することができな
いといった欠点もあった。
However, in the above-mentioned conventional structure, the minimum diameter of the orifice hole formed by machining has a certain limit, and it may be necessary to increase the diameter of the cylinder case in order to obtain the desired hydraulic shock absorbing characteristics. Had the harmful effect of becoming larger. Further, since the orifice has a fixed diameter as described above, there is a drawback that the hydraulic shock absorbing characteristics cannot be changed and adjusted.

本発明は、簡単な構造改良により、上記不具合点を解消
することを目的としている。
An object of the present invention is to solve the above-mentioned problems by a simple structure improvement.

〔課題を解決するための手段〕[Means for Solving the Problems]

本発明の特徴構成は、冒頭に記載した油圧式緩衝装置に
おいて、前記ピストンに前記各油室を連通する連通孔を
形成するとともに、この連通孔内に前記連通孔より小径
の線材を挿通状態で配設して前記オリフィスを構成して
ある点にある。
A characteristic configuration of the present invention is that, in the hydraulic shock absorber described at the beginning, a communication hole that communicates each of the oil chambers is formed in the piston, and a wire having a diameter smaller than the communication hole is inserted into the communication hole. The point is that the orifices are arranged to form the orifice.

〔作 用〕[Work]

前記ピストンに機械加工によって連通孔を穿設するとと
もに、この連通孔に小径線材を挿通配備することで、オ
リフィスとしての実効断面積は、前記連通孔の断面積と
線材の断面積との差であるから、連通孔の内径と線材の
外径との寸法管理によりオリフィスを所望の微少面積に
設定することができる。
By forming a communication hole in the piston by machining and inserting a small-diameter wire rod through the communication hole, the effective cross-sectional area as an orifice is the difference between the cross-sectional area of the communication hole and the wire rod. Therefore, the orifice can be set to a desired minute area by dimensional control of the inner diameter of the communication hole and the outer diameter of the wire.

〔発明の効果〕〔The invention's effect〕

その結果、シリンダの径、即ち外形を大型化させること
なく、小面積オリフィスによる所望の油圧緩衝特性を有
するものを、従来と同様な寸法精度の機械加工により得
られることとなった。
As a result, it has become possible to obtain a machine having a desired hydraulic shock absorbing characteristic by a small area orifice by machining with the same dimensional accuracy as the conventional one without increasing the diameter of the cylinder, that is, the outer shape.

〔実施例〕〔Example〕

以下、本発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below with reference to the drawings.

第5図に本発明に係る油圧式緩衝装置(1)を備えた乗
用型田植機を示している。この田植機は、乗用型走行機
体の後部に、油圧シリンダ(2)の駆動により昇降揺動
自在なリンク機構(3)を介して苗植付装置(4)を昇
降駆動自在並びに前後軸芯(Y)周りでローリング自在
に連結して構成してある。前記苗植付装置(4)は、後
下り傾斜姿勢の苗載せ台(5)、苗載せ台(5)の下端
から苗を一株づつ切り出して植付ける複数の植付機構
(6)及び接地フロート(7)等から成り、前記苗載せ
台(5)の上方には予備苗収容装置(8)を配設してあ
る。
FIG. 5 shows a riding type rice transplanter equipped with the hydraulic shock absorber (1) according to the present invention. In this rice transplanter, a seedling planting device (4) can be driven up and down through a link mechanism (3) that can be lifted and lowered by driving a hydraulic cylinder (2) in the rear part of a riding type traveling body and a front and rear axis ( Y) It is configured so that it can be rolled around around. The seedling planting device (4) comprises a seedling mount (5) in a backward descending posture, a plurality of planting mechanisms (6) for cutting and planting seedlings from the lower end of the seedling mount (5) and grounding. It comprises a float (7) and the like, and a preliminary seedling accommodation device (8) is arranged above the seedling placing table (5).

前記予備苗収容装置(8)は苗載せ台(5)と略平行な
姿勢で予備苗を載置保持する苗載置位置と下端側が苗載
せ台(5)上に下方揺動して、予備苗を苗載せ台(5)
上に滑動供給する苗供給位置とに亘り横軸芯周りで揺動
自在に取付けてある。上記苗載置位置から苗供給位置へ
の切換えは苗残量の検出に基づく電磁ソレノイド(図示
せず)の駆動により自動で行うよう構成し、長時間作業
が可能となるようにしてある。
In the preliminary seedling accommodation device (8), the seedling placement position where the preliminary seedlings are placed and held in a posture substantially parallel to the seedling placement table (5) and the lower end side are swung downward on the seedling placement table (5), Seedling stand (5)
It is mounted so as to be swingable around the horizontal axis center over the seedling supply position where it is supplied by sliding upward. The switching from the seedling placement position to the seedling supply position is automatically performed by driving an electromagnetic solenoid (not shown) based on the detection of the remaining amount of seedlings, which enables long-time work.

左右の接地フロート(7),(7)により苗植付装置
(4)の対泥面左右傾斜を検知するようにして、その検
知作動に基づいてローリングシリンダ(10)により苗植
付装置(4)を前記軸芯(Y)周りで回動駆動させて苗
植付装置(4)を対泥面水平姿勢に維持すべく図示しな
い制御装置で制御するよう構成してある。前記ローリン
グシリンダ(10)は、第4図に示すように、前記リンク
機構(3)における後部側リンク(3a)の上部に、その
シリンダケース(10a)を固定する状態で配備され、複
動型に構成してある。そして、ピストンロッド(10b)
の両端を夫々緩衝用コイルスプリング(11),(11)を
介して苗載せ台(5)の前面側左右両側部に連結して、
左右各油室のいずれかに圧油を供給することで苗植付装
置(4)を軸芯(Y)周りでローリング駆動するよう構
成してある。
The left and right ground floats (7), (7) are used to detect the lateral inclination of the seedling planting device (4) against the mud surface, and based on the detection operation, the rolling cylinder (10) is used to plant the seedling planting device (4). ) Is rotationally driven around the axis (Y) to control the seedling planting device (4) by a controller (not shown) so as to maintain the horizontal posture against the mud surface. As shown in FIG. 4, the rolling cylinder (10) is arranged above the rear side link (3a) of the link mechanism (3) with its cylinder case (10a) fixed, and is a double-acting type. Is configured. And the piston rod (10b)
Both ends of each are connected to the left and right sides of the front side of the seedling placing stand (5) via the buffer coil springs (11) and (11), respectively.
By supplying pressure oil to either of the left and right oil chambers, the seedling planting device (4) is configured to roll around the axis (Y).

そして、前記後部側リンク(3a)と苗載せ台(5)の上
部側摺動レール(12)支持フレーム(13)との間に、ロ
ーリング作動において予備苗を載置した大重量の苗載せ
台(5)の慣性によるオーバーローリングを規制するた
めの油圧式緩衝装置(1)を枢支連結してある。次に、
前記緩衝装置(1)について説明する。
Then, between the rear side link (3a) and the upper side slide rail (12) supporting frame (13) of the seedling placing table (5), a heavy seedling placing table on which a preliminary seedling is placed in a rolling operation. A hydraulic shock absorber (1) for restricting overrolling due to inertia (5) is pivotally connected. next,
The shock absorber (1) will be described.

前記緩衝装置(1)は、第1図に示すように、シリンダ
ケース(14)内において、ピストンロッド(15)の押引
きによって移動するピストン(16)の両側に作動油を充
填した一対の油室(R1),(R2)を形成するとともに、
前記ピストン(16)に前記各油室(R1),(R2)を連通
するオリフィス(17)を形成してある。前記ピストンロ
ッド(15)はシリンダケース(14)内を貫通してその軸
芯方向に相対移動できるよう構成し、ピストンロッド
(15)の一端部を後部側リンク(3a)に前後軸芯周りで
相対揺動自在に枢支連結してある。そして、ピストン
(16)の両側で各油室(R1)(R2)を形成するためのス
ペーサ部材(20a),(20b)は、夫々、その内周部にダ
ストシール(21)及びオイルシール(22)を予め装着し
た状態でシリンダケース(14)の内方側に挿入し、か
つ、位置固定して取付けるよう構成してある。つまり、
前記後部リンク(3a)側のスペーサ部材(20a)はシリ
ンダケース(14)の一端にシール部材(23)を介して螺
合装着し、他方のスペーサ部材(20b)はシリンダケー
ス(14)に内嵌させてストッパ(24)で位置決めしてあ
る。
As shown in FIG. 1, the shock absorber (1) includes a pair of oils filled with hydraulic oil on both sides of a piston (16) which is moved by pushing and pulling a piston rod (15) in a cylinder case (14). While forming the chambers (R 1 ) and (R 2 ),
The piston (16) is formed with an orifice (17) communicating with the oil chambers (R 1 ) and (R 2 ). The piston rod (15) is configured to penetrate through the cylinder case (14) so as to be relatively movable in the axial center direction, and one end of the piston rod (15) is connected to the rear side link (3a) around the front and rear axis. It is pivotally connected for relative swing. The spacer members (20a) and (20b) for forming the oil chambers (R 1 ) and (R 2 ) on both sides of the piston (16) respectively have a dust seal (21) and an oil seal on their inner peripheral portions. It is configured such that (22) is inserted in the cylinder case (14) in a state where it is attached in advance and the position is fixed. That is,
The spacer member (20a) on the side of the rear link (3a) is screwed to one end of the cylinder case (14) via the seal member (23), and the other spacer member (20b) is inside the cylinder case (14). It is fitted and positioned by the stopper (24).

前記シリンダケース(14)の他端側は前記支持フレーム
(13)に固定した支持部材(25)に一対のピン(26),
(26)により機体前後軸芯周りで相対回動自在に枢支し
てある。前記支持部材(25)は第3図に示すように楕円
形のパイプ形状に形成してあり、小径部分がシリンダケ
ース(14)の外径と略同一となるよう構成し、ガタツキ
なく枢支できるようにしてある。
The other end of the cylinder case (14) has a pair of pins (26) on a support member (25) fixed to the support frame (13).
By (26), it is pivotally supported so as to be relatively rotatable around the longitudinal axis of the machine body. As shown in FIG. 3, the support member (25) is formed in an elliptical pipe shape, and the small diameter portion is configured to be substantially the same as the outer diameter of the cylinder case (14) so that it can pivot without rattling. Is done.

そして、前記ピストン(16)に前記各油室(R1),
(R2)を連通する連通孔(18)を形成するとともに、こ
の連通孔(18)内に前記連通孔(18)より小径の線材
(19)を挿通状態で配設して前記オリフィス(17)を構
成してある。前記線材(19)は例えば鋼材線等の硬質で
寸法精度の高い材質で構成してある。このように構成す
ると、第2図に示すように、オリフィス(17)としての
有径面積は連通孔(18)の断面積と線材(19)の断面積
の差により決定され、微小面積であっても高精度で所望
の緩衝特性を得られることになる。
Then, in the piston (16), the oil chambers (R 1 ),
A communicating hole (18) communicating with (R 2 ) is formed, and a wire rod (19) having a diameter smaller than that of the communicating hole (18) is inserted in the communicating hole (18) so that the orifice (17) is formed. ) Is configured. The wire rod (19) is made of a hard material having high dimensional accuracy, such as a steel wire. With this structure, as shown in FIG. 2, the diameter area of the orifice (17) is determined by the difference between the cross-sectional area of the communication hole (18) and the cross-sectional area of the wire (19) and is a very small area. However, the desired cushioning characteristics can be obtained with high accuracy.

尚、特許請求の範囲の項に図面との対照を便利にする為
に符号を記すが、該記入により本発明は添付図面の構造
に限定されるものではない。
It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

【図面の簡単な説明】[Brief description of drawings]

図面は本発明に係る油圧式緩衝装置の実施例を示し、第
1図は縦断平面図、第2図は縦断側面図、第3図は枢支
連結部の縦断側面図、第4図は苗植付装置の正面図、第
5図は田植機の全体側面図である。 (14)……シリンダケース、(15)……ピストンロッ
ド、(16)……ピストン、(17)……オリフィス、(1
8)……連通孔、(19)……線材、(R1),(R2)……
油室。
The drawings show an embodiment of the hydraulic shock absorber according to the present invention. Fig. 1 is a vertical sectional plan view, Fig. 2 is a vertical sectional side view, Fig. 3 is a vertical sectional side view of a pivotal connecting portion, and Fig. 4 is a seedling. FIG. 5 is a front view of the planting device, and FIG. 5 is an overall side view of the rice transplanter. (14) …… Cylinder case, (15) …… Piston rod, (16) …… Piston, (17) …… Orifice, (1
8) …… Communication hole, (19) …… Wire, (R 1 ), (R 2 ) ……
Oil chamber.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】シリンダケース(14)内において、ピスト
ンロッド(15)の押引きによって移動するピストン(1
6)の両側に作動油を充填した一対の油室(R1),
(R2)を形成するとともに、前記ピストン(16)に前記
各油室(R1),(R2)を連通するオリフィス(17)を形
成してある油圧式緩衝装置であって、前記ピストン(1
6)に前記各油室(R1),(R2)を連通する連通孔(1
8)を形成するとともに、この連通孔(18)内に前記連
通孔(18)より小径の線材(19)を挿通状態で配設して
前記オリフィス(17)を構成してある油圧式緩衝装置。
1. A piston (1) that moves by pushing and pulling a piston rod (15) in a cylinder case (14).
A pair of oil chambers (R 1 ) filled with hydraulic oil on both sides of 6),
(R 2 ) and an orifice (17) that connects the oil chambers (R 1 ) and (R 2 ) to the piston (16). (1
6) A communication hole (1 that connects the oil chambers (R 1 ) and (R 2 )
8) is formed, and a wire rod (19) having a diameter smaller than that of the communication hole (18) is inserted into the communication hole (18) to form the orifice (17). .
JP199390A 1990-01-08 1990-01-08 Hydraulic shock absorber Expired - Lifetime JPH0726660B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP199390A JPH0726660B2 (en) 1990-01-08 1990-01-08 Hydraulic shock absorber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP199390A JPH0726660B2 (en) 1990-01-08 1990-01-08 Hydraulic shock absorber

Publications (2)

Publication Number Publication Date
JPH03209032A JPH03209032A (en) 1991-09-12
JPH0726660B2 true JPH0726660B2 (en) 1995-03-29

Family

ID=11516989

Family Applications (1)

Application Number Title Priority Date Filing Date
JP199390A Expired - Lifetime JPH0726660B2 (en) 1990-01-08 1990-01-08 Hydraulic shock absorber

Country Status (1)

Country Link
JP (1) JPH0726660B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5662046A (en) * 1993-12-14 1997-09-02 Hansen Inc. Method and apparatus for controlling railway truck hunting and a railway car body supported thereby
JP5395333B2 (en) 2007-05-11 2014-01-22 日立工機株式会社 Driving machine

Also Published As

Publication number Publication date
JPH03209032A (en) 1991-09-12

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