JPS6327526Y2 - - Google Patents
Info
- Publication number
- JPS6327526Y2 JPS6327526Y2 JP9319281U JP9319281U JPS6327526Y2 JP S6327526 Y2 JPS6327526 Y2 JP S6327526Y2 JP 9319281 U JP9319281 U JP 9319281U JP 9319281 U JP9319281 U JP 9319281U JP S6327526 Y2 JPS6327526 Y2 JP S6327526Y2
- Authority
- JP
- Japan
- Prior art keywords
- locking member
- link
- notch
- protrusion
- engaged
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Agricultural Machines (AREA)
Description
【考案の詳細な説明】
本考案は、トラクタ等の移動車輌にロータリ耕
耘機、プラウ等の作業機を牽引装着するための三
点リンク機構のロアリンクに関する。[Detailed Description of the Invention] The present invention relates to a lower link of a three-point linkage mechanism for towing and mounting a working machine such as a rotary tiller or a plow on a moving vehicle such as a tractor.
ロアリンクと作業機との連結を容易にするため
に、第10図に示すように、ロアリンク9を前後
2分割して、第1リンク10と第2リンク12と
を長手方向相対移動自在に且つ若干の上下揺動を
可能に構成して、第2リンク12を作業機に連結
した後に、両リンク10,12を収縮し、第1リ
ンク10に設けたロツク部材20と第2リンク1
2に設けた切欠部23とを係合して、両リンク1
0,12の移動を阻止するようにしたロアリンク
9が考案されている。 In order to facilitate the connection between the lower link and the working machine, the lower link 9 is divided into front and rear halves, as shown in FIG. 10, so that the first link 10 and the second link 12 can be moved relative to each other in the longitudinal direction. After the second link 12 is connected to the working machine by being configured to allow slight vertical swinging, both links 10 and 12 are contracted, and the lock member 20 provided on the first link 10 and the second link 1 are retracted.
By engaging the notch 23 provided in 2, both links 1
A lower link 9 has been devised that prevents movement of 0 and 12.
このロアリンク9においては、両リンク10,
12の収縮状態で若干の遊びがあり、第1・第2
リンク10,12に引張り、圧縮荷動が繰返し加
えられると、ロツク部材20の係合面29と切欠
部23の被係合面24とは衝突し、第11図に示
すように、両面24,29はへたつてくる。 In this lower link 9, both links 10,
There is some play in the contracted state of 12, and the 1st and 2nd
When tensile and compressive loads are repeatedly applied to the links 10 and 12, the engaging surface 29 of the lock member 20 and the engaged surface 24 of the notch 23 collide, and as shown in FIG. 29 is getting tired.
係合面29及び被係合面24が夫々ロツク部材
20の軸線と平行であると、へたりが生じると軸
線に対して傾斜するようになり、引張り荷重が加
わると、ロツク部材20を押上げる力αが発生
し、第2リンク12が自然離脱することがある。 If the engaging surface 29 and the engaged surface 24 are parallel to the axis of the locking member 20, they will become inclined with respect to the axis when settling occurs, and when a tensile load is applied, the locking member 20 will be pushed up. A force α may be generated, and the second link 12 may come off naturally.
本考案は、このような問題点に鑑み、切欠部の
被係合面にその底面から離隔した位置に突起部を
設け、この突起部をロツク部材の係合面の端部か
ら離れた部位に当接するように構成することによ
つて、へたりを生じてもロツク部材を押上げる力
を生じるような傾斜面を形成することがないロア
リンクを提供することを目的とする。 In view of these problems, the present invention provides a protrusion on the engaged surface of the notch at a position spaced apart from the bottom surface thereof, and places this protrusion at a location remote from the end of the engagement surface of the lock member. It is an object of the present invention to provide a lower link which does not form an inclined surface that would generate a force to push up a lock member even if the lower link sag by being configured to abut against each other.
この目的を達成するための本考案の特徴とする
ところは、作業機を移動車輌に連結するロアリン
クを前後2分割し、第1リンクの端部に筒状部と
この筒状部内へ進退自在なロツク部材とを設け、
前記筒状部内に長手方向相対移動自在に内嵌され
た第2リンクの端部にその移動を阻止すべくロツ
ク部材と係合可能な切欠部を設けたロアリンクで
あつて、前記ロツク部材の係合面と対向する切欠
部の被係合面にはロツク部材側に突出した突起部
が形成されており、この突起部は切欠部の被係合
面と底面との交差点から離隔し且つロツク部材の
先端面から離れた係合面の部位と当接する位置に
形成されている点にある。 The features of the present invention to achieve this purpose are that the lower link that connects the working machine to the moving vehicle is divided into two parts, front and rear, and the first link has a cylindrical part at the end and can move freely into and out of the cylindrical part. and a locking member,
The lower link is provided with a notch that can be engaged with a lock member to prevent movement of the second link, the end of which is fitted within the cylindrical portion so as to be relatively movable in the longitudinal direction, A protrusion protruding toward the lock member is formed on the engaged surface of the notch that faces the engagement surface, and this protrusion is spaced apart from the intersection of the engaged surface and the bottom surface of the notch, and The point is that it is formed at a position where it comes into contact with a portion of the engagement surface that is remote from the distal end surface of the member.
以下、図示の実施例について本考案を詳述す
る。 The invention will now be described in detail with reference to the illustrated embodiments.
第1図乃至第4図に示す本考案の第1実施例に
おいて、1はトラクタ車体、2は後輪、3は運転
席である。4はトラクタ車体1の後部に搭載され
た油圧装置で、左右一対のリフトアーム5を有す
る。6は作業機としてのロータリ耕耘機であつ
て、三点リンク機構7を介してトラクタ車体1の
後方に装着され、かつ油圧装置4により昇降自在
である。 In the first embodiment of the present invention shown in FIGS. 1 to 4, 1 is a tractor body, 2 is a rear wheel, and 3 is a driver's seat. Reference numeral 4 denotes a hydraulic system mounted on the rear part of the tractor body 1, which has a pair of left and right lift arms 5. Reference numeral 6 denotes a rotary tiller as a working machine, which is attached to the rear of the tractor body 1 via a three-point linkage mechanism 7, and can be raised and lowered by a hydraulic device 4.
三点リンク機構7は1本のトツプリンク8と左
右一対のロアリンク9とを備えて成る。各ロアリ
ンク9はロアリンク本体10(第1リンク)と、
該ロアリンク本体10後端の筒状部11に長手方
向出退自在に挿入された可動リンク12(第2リ
ンク)とを有し、そのロアリンク本体10はトラ
クタ車体1に枢支軸13により枢支されると共
に、リフトロツド14を介してリフトアーム5に
連結されている。勿論、チエツクチエーンもロア
リンク本体10に連結されている。 The three-point link mechanism 7 includes one top link 8 and a pair of left and right lower links 9. Each lower link 9 includes a lower link main body 10 (first link),
The lower link body 10 has a movable link 12 (second link) inserted into the cylindrical portion 11 at the rear end so as to be freely retractable in the longitudinal direction. It is pivotally supported and connected to the lift arm 5 via a lift rod 14. Of course, the check chain is also connected to the lower link body 10.
筒状部11は、第2図乃至第4図に示すように
左右一対の側板15と、この側板15間をつなぐ
上下一対の上板16及び下板17とを矩形筒状に
結合して成り、その後端部はU字状の補強材18
により上下から夫々補強されている。 As shown in FIGS. 2 to 4, the cylindrical portion 11 is formed by combining a pair of left and right side plates 15 and a pair of upper and lower plates 16 and 17 connecting the side plates 15 into a rectangular cylindrical shape. , the rear end is a U-shaped reinforcement 18
It is reinforced from the top and bottom respectively.
また筒状部11には、上板16の長手方向略中
央より若干前方に偏位した位置に保持筒19が突
設され、この保持筒19に後述するロツク部材2
0が筒状部11内へ進退自在に保持されている。
可動リンク12は前端の上下角部を欠除して成る
傾斜部21,22を有すると共に、その上縁側の
傾斜部21の後方に長手方向の切欠部23が形成
され、この切欠部23前端の底面23aから起立
した面部が後述するロツク用の被係合面24とさ
れている。 Further, a holding cylinder 19 is provided in the cylindrical portion 11 in a protruding manner at a position slightly deviated forward from the longitudinal center of the upper plate 16, and a locking member 2, which will be described later, is attached to this holding cylinder 19.
0 is held in the cylindrical portion 11 so as to be able to move forward and backward.
The movable link 12 has sloped parts 21 and 22 formed by cutting out the upper and lower corners of the front end, and a longitudinal notch 23 is formed at the rear of the sloped part 21 on the upper edge side. A surface portion standing up from the bottom surface 23a is an engaged surface 24 for a lock, which will be described later.
また、可動リンク12はロータリ耕耘機6の取
付ピン25に対して着脱自在なボール接手構造の
連結部26を後端に有する。27は抜止ピンであ
つて、筒状部11の上部側後端部に側板15間に
跨つて打込まれており、この抜止めピン27は切
欠部23の範囲内で可動リンク12の出退動作を
許容すると共に、その後方突出時に、該可動リン
ク12がロアリンク本体10に対する直線状態の
位置より上方側でのみ屈折揺動するように、切欠
部23に係合せしめられている。 Further, the movable link 12 has a connecting portion 26 having a ball joint structure at the rear end, which is detachable from the mounting pin 25 of the rotary tiller 6 . Reference numeral 27 denotes a retaining pin, which is driven into the rear end of the upper side of the cylindrical portion 11 so as to span between the side plates 15. The movable link 12 is engaged with the notch 23 so as to allow the movement and to bend and swing only above the straight position with respect to the lower link body 10 when the movable link 12 protrudes rearward.
ロツク部材20は第2図に示すように左右両側
面に偏平面28を有し、この偏平面28が側板1
5に当接して、側板15間に回動不能でかつ挿抜
自在とされると共に、切欠部23前端の被係合面
24に係脱自在に面接触する係合面29を有す
る。35は可動リンク12を挿入する際に傾斜部
21と当接する押上げ面である。ロツク部材20
は保持筒19に上下摺動自在に内嵌されると共
に、及びその上端に螺着された蓋体30に上下摺
動自在に内嵌する軸部31を有し、その軸部31
の上端には把持リング32が設けられている。 As shown in FIG. 2, the locking member 20 has flat surfaces 28 on both left and right sides, and these flat surfaces 28
5, the engagement surface 29 is unrotatable between the side plates 15 and can be freely inserted and removed, and also has an engagement surface 29 that is in surface contact with the engagement surface 24 at the front end of the notch 23 in a detachable manner. 35 is a push-up surface that comes into contact with the inclined portion 21 when the movable link 12 is inserted. Lock member 20
has a shaft portion 31 which is vertically slidably fitted into the holding cylinder 19 and vertically slidably fitted into the lid body 30 screwed onto the upper end of the shaft portion 31.
A gripping ring 32 is provided at the upper end of the holder.
また、ロツク部材20は蓋体30との間に介在
されたコイルバネ33により下方に付勢されてい
る。蓋体30の下側面には、ロツク部材20の軸
部31を取囲むように突出部30aが同心状に形
成されており、この突出部30aは軸部31に対
する案内部分を十分に確保して、その芯ずれ等を
防止すると共に、ロツク部材20の上昇限界を、
下端が筒状部11の上板16と略面一となるよう
に規制するようにしている。34は補強リブであ
る。 Further, the lock member 20 is biased downward by a coil spring 33 interposed between the lock member 20 and the lid body 30. A protrusion 30a is formed concentrically on the lower surface of the lid 30 so as to surround the shaft 31 of the lock member 20, and the protrusion 30a has a sufficient guide portion for the shaft 31. , to prevent misalignment, etc., and to set the upper limit of the locking member 20.
The lower end is regulated so as to be substantially flush with the upper plate 16 of the cylindrical portion 11. 34 is a reinforcing rib.
前記可動リンク12は横断面矩形状の長方形鉄
板で形成されており、溶断で傾斜部21,22及
び切欠部23を形成している。切欠部23の底面
23aと被係合面24との交差点Aは、第10図
のものにおいては略直角であり、溶断では正確な
直角は出難く、丸くなつたりすることが多く、そ
のために前述したような第11図に示すへたりを
生じ易すかつた。 The movable link 12 is formed of a rectangular iron plate having a rectangular cross section, and has inclined portions 21, 22 and a cutout portion 23 formed by fusing. The intersection A between the bottom surface 23a of the notch 23 and the engaged surface 24 is approximately a right angle in the one shown in FIG. It was easy to cause sagging as shown in FIG. 11.
本考案では、この交差点Aに更に円弧状凹部3
7を形成し、被係合面24の交差点Aから離隔し
た位置に突起部38を形成している。従つて交差
点Aは仮想の点となつている。ロツク部材20と
切欠部23の係合は第2図に示す如く、ロツク部
材20の端面20aが切欠部23の底面23aに
近接した状態となり、突起部38は端面20aか
ら上方へ離れた位置で係合面29と当接し、係合
面29の下部は凹部37と対向するだけで被係合
面24との当接はない。 In the present invention, an arcuate recess 3 is further added to this intersection A.
7, and a protrusion 38 is formed at a position spaced apart from the intersection A of the engaged surface 24. Therefore, intersection A is a virtual point. As shown in FIG. 2, the engagement between the locking member 20 and the notch 23 is such that the end surface 20a of the locking member 20 is close to the bottom surface 23a of the notch 23, and the protrusion 38 is in a position upwardly away from the end surface 20a. The lower part of the engaging surface 29 only faces the recess 37 and does not come into contact with the engaged surface 24 .
従つて、可動リンク12に繰返し引張り荷重が
加わると、突起部38は係合面29に衝突して両
者に変形を生じるが、突起部38の変形はその突
出量が減少するようにへたり、係合面29は突起
部38の当接する部分がへこむようになり、どち
らの変形が生じても又は両者変形が共に生じて
も、凹部37が存在するので、第11図に示すよ
うな傾斜状のへたりは生じなく、ロツク部材20
が被係合面24によつて押上げられて、可動リン
ク12が自然離脱するということはない。 Therefore, when a tensile load is repeatedly applied to the movable link 12, the protrusion 38 collides with the engagement surface 29 and deforms both, but the deformation of the protrusion 38 subsides so that the amount of protrusion decreases. The engaging surface 29 is recessed at the portion where the protrusion 38 comes into contact, and regardless of which deformation occurs or both deformations occur, since the recess 37 exists, the inclined shape shown in FIG. 11 is formed. The locking member 20 does not loosen.
There is no possibility that the movable link 12 will be pushed up by the engaged surface 24 and the movable link 12 will naturally separate.
第5図は本考案の第2実施例を示しており、切
欠部23の凹部37は三角形状となつており、従
つて被係合面24には台形状の突起部38が形成
されている。この実施例でも前記実施例と同様
に、繰返し引張り荷重によつて、突起部38がへ
たつたり、係合面29に仮想線で示すようなへこ
みが生じたりするだけで、ロツク部材20を押上
げるような傾斜面は生じない。尚、その他の構成
は第1実施例と同一である。 FIG. 5 shows a second embodiment of the present invention, in which the recess 37 of the notch 23 has a triangular shape, and therefore a trapezoidal protrusion 38 is formed on the engaged surface 24. . In this embodiment, as in the previous embodiment, the locking member 20 is pushed only by the protrusion 38 becoming flattened or the engagement surface 29 being dented as shown by the imaginary line due to repeated tensile loads. There are no slopes that raise the surface. Note that the other configurations are the same as in the first embodiment.
第6図及び第7図は本考案の第3実施例を示し
ており、可動リンク12の切欠部23には四角形
状の凹部37が形成され、被係合面24に四角形
又は台形状の突起部38が形成され、この突起部
38はロツク部材20の係合面29の中途部に当
接しており、ロツク部材20の自然押上げ防止は
前記実施例と同様に行ない得る。 6 and 7 show a third embodiment of the present invention, in which a rectangular recess 37 is formed in the notch 23 of the movable link 12, and a rectangular or trapezoidal protrusion is formed in the engaged surface 24. A portion 38 is formed, and this protrusion 38 abuts the middle portion of the engagement surface 29 of the locking member 20, so that the natural pushing up of the locking member 20 can be prevented in the same manner as in the previous embodiment.
可動リンク12の先端部12aはその上下幅が
中途部よりも狭く、上板16との間に間隙Bを有
している。この間隙Bを設けることにより、ロツ
ク部材20を側板15,15間から完全に抜き出
さなくとも、可動リンク12との係合解除は可能
となり、ロツク部材20を引上げたときの廻り止
めを偏平面28の下部が側板15,15と当接し
ていることによりすることができる。 The distal end portion 12a of the movable link 12 has a vertical width narrower than the midway portion, and has a gap B between it and the upper plate 16. By providing this gap B, it becomes possible to disengage the lock member 20 from the movable link 12 without completely pulling it out from between the side plates 15, 15, and prevent rotation when the lock member 20 is pulled up from the flat surface. This can be achieved by the lower part of 28 being in contact with the side plates 15, 15.
ロツク部材20を引上げたときに廻り止めをす
るのは、ロツク部材20にロツク機能を確実に発
揮させるためであり、ロツク部材20が180゜回動
して被係合面24に押上げ面35が当接するよう
になれば、可動リンク12に引張り荷重が加わる
とロツク部材20が自然に押上げられ、可動リン
ク12の移動阻止ができなくなる。 The reason why the locking member 20 is prevented from rotating when it is pulled up is to ensure that the locking member 20 performs its locking function. When the movable links 12 come into contact with each other, when a tensile load is applied to the movable link 12, the locking member 20 is naturally pushed up, and the movable link 12 cannot be prevented from moving.
ロツク部材20の廻り止めは、第10図に示す
ように、ロツク部材20を引き上げても、上板1
6と係合面29とを当接させておくことによつて
行なわせても良いが、この構造では、保持筒19
を上板16内に嵌入しておけなく、上板16の端
部を保持筒19内に突出させておく必要があり、
そのために、保持筒19の端部19aをフライス
加工しなければならず、コスト高になる。 As shown in FIG. 10, the locking member 20 is prevented from rotating even if the locking member 20 is pulled up.
6 and the engagement surface 29, but in this structure, the holding cylinder 19
cannot be fitted into the upper plate 16, and the end of the upper plate 16 must protrude into the holding cylinder 19.
Therefore, the end portion 19a of the holding cylinder 19 must be milled, which increases the cost.
そこで、第6図に示すように、可動リンク12
の先端部12aを幅狭にしておけば、保持筒19
を上板16内に嵌入しておいても、ロツク部材2
0を先端部12aより高位置に引上げた状態で、
偏平面28の下部を側板15に当接させた状態を
維持でき、この当接によつてロツク部材20の廻
り止めができる。従つて、保持筒19の加工は不
要であり、可動リンク12は溶断だけの簡単な加
工で形成でき、ロツク部材20の廻り止め構造を
容易に形成できる。 Therefore, as shown in FIG.
If the tip end 12a of the holding tube 19 is made narrow, the holding tube 19
Even if the lock member 2 is inserted into the upper plate 16,
0 is pulled up to a higher position than the tip 12a,
The lower part of the flat surface 28 can be kept in contact with the side plate 15, and this contact can prevent the lock member 20 from rotating. Therefore, there is no need to process the holding cylinder 19, and the movable link 12 can be formed by a simple process of fusing and cutting, and the rotation prevention structure of the locking member 20 can be easily formed.
また、ロツク部材20の偏平面28及び係合面
29の上下幅は切欠部23の深さよく長く、係合
状態のとき、ロツク部材20の先端面20aは底
面23aに当接し、ロツク部材20の偏平面28
の上方の円形部20bは側板15と当接しないよ
うに構成されており、可動リンク12の引張り荷
重によりロツク部材20がこじれても、円形部2
0bが側板15に当つて側板12上縁にカエリを
生じたりすることがなく、従つてこのようなカエ
リによりロツク部材20の作動が不良になつたり
する危険性が皆無になる。 Further, the vertical widths of the flat surface 28 and the engaging surface 29 of the locking member 20 are long enough to correspond to the depth of the notch 23, and when the locking member 20 is in the engaged state, the tip end surface 20a of the locking member 20 abuts the bottom surface 23a, and the locking member 20 oblique plane 28 of
The upper circular portion 20b is configured so as not to come into contact with the side plate 15, so that even if the lock member 20 is twisted due to the tensile load of the movable link 12, the circular portion 20b
0b will not hit the side plate 15 and cause burrs on the upper edge of the side plate 12, and therefore there is no risk that the locking member 20 will malfunction due to such burrs.
また、この第3実施例においては、コイルバネ
33に円錐バネを用いており、ロツク部材20を
引上げてコイルバネ33を圧縮したときの寸法が
円筒バネより短かくなるので、保持筒19の長さ
を短かくしたり又はロツク部材20の円形部20
bの軸方向長さを長くしたりできる。 Further, in this third embodiment, a conical spring is used as the coil spring 33, and when the locking member 20 is pulled up and the coil spring 33 is compressed, its dimension is shorter than that of a cylindrical spring. Shortened or circular portion 20 of locking member 20
The axial length of b can be increased.
第8図及び第9図は本考案の第4実施例を示し
ており、可動リンク12の切欠部23の凹部37
は第2実施例と同様に三角形状であり、ロツク部
材20の係合面29には凹部37に適合する凸部
39が形成されており、突起部38が係合面29
に当接すると同時に凹部37と凸部39とは当接
し、係合面29は被係合面24の全面と当接す
る。この実施例によれば、係合面29及び被係合
面24に繰返し引張り荷重によりへたりが生じて
も、凹部37及び凸部39の当接面は、ロツク部
材20を引下げる方向に傾斜しているので、第1
1図に示すようなロツク部材20を押上げる傾斜
状態にはならない。但しこの実施例では、ロツク
部材20の作用を解除する際、可動リンク12を
ロアリンク本体10内に若干押入れながら行なわ
ねばならない。 8 and 9 show a fourth embodiment of the present invention, in which a recess 37 of a cutout 23 of a movable link 12 is shown.
has a triangular shape as in the second embodiment, and the engagement surface 29 of the locking member 20 is formed with a protrusion 39 that fits into the recess 37, and the protrusion 38 fits into the engagement surface 29.
At the same time, the recessed portion 37 and the convex portion 39 abut against each other, and the engaging surface 29 abuts the entire surface of the engaged surface 24 . According to this embodiment, even if the engaging surface 29 and the engaged surface 24 undergo fatigue due to repeated tensile loads, the contact surfaces of the concave portion 37 and the convex portion 39 are inclined in the direction in which the locking member 20 is pulled down. Therefore, the first
The locking member 20 is not pushed up as shown in FIG. However, in this embodiment, when releasing the action of the locking member 20, the movable link 12 must be pushed slightly into the lower link body 10.
ロツク部材20の軸部31は上下2分割されて
いて、ピン40を介して枢支連結されており、こ
のピン40は可動リンク12と交差方向に位置し
ている。 The shaft portion 31 of the locking member 20 is divided into upper and lower halves, which are pivotally connected via a pin 40, and this pin 40 is located in a direction crossing the movable link 12.
ロツク部材20は可動リンク12と係合してい
ると、可動リンク12の引張り荷重を受けて、C
点を中心に軸部31にD方向のモーメントが加わ
り、蓋体30からの反力によつて軸部31が曲が
り引上げ困難になることがある。この問題を解消
するには、蓋体30の貫通孔30bの径を大きく
すれば良いが、コイルバネ33の設定に制約を加
えることになる。 When the locking member 20 is engaged with the movable link 12, it receives the tensile load of the movable link 12 and C
A moment is applied to the shaft portion 31 in the D direction around the point, and the shaft portion 31 may bend due to the reaction force from the lid 30, making it difficult to pull it up. To solve this problem, the diameter of the through hole 30b of the lid body 30 may be increased, but this imposes restrictions on the setting of the coil spring 33.
そこで前記のように、軸部31を上下2分割し
て、下軸部31aを上軸部31bに対して横軸廻
り回動不能にすれば、ロツク部材20が可動リン
ク12の引張りによりこじれても、上軸部31b
は曲がることがなく、ロツク部材20を常に軽快
に上下動させることができる。 Therefore, as described above, if the shaft portion 31 is divided into upper and lower halves and the lower shaft portion 31a is made unrotatable about the horizontal axis with respect to the upper shaft portion 31b, the lock member 20 will not be distorted by the tension of the movable link 12. Also, the upper shaft portion 31b
does not bend, and the lock member 20 can always be moved up and down easily.
以上詳述した本考案によれば、第2リンク12
の切欠部23の被係合面24にはロツク部材20
側に突出した突起部38が設けられており、この
突起部38は被係合面24と底面23aとの交差
点Aが離隔した位置にあり、また、ロツク部材2
0の先端面20aから離れた係合面29の部位と
当接するので、第2リンク12に加わる引張り荷
重によつて突起部38がへたり、係合面29が変
形しても、ロツク部材20を押上げるようなへた
り又は変形とはならなく、ロツク部材20と切欠
部23とは常に正常な係合状態が得られ、第2リ
ンク12の自然離脱を確実に防止することができ
ると共に、ロアリンク9の耐久性を向上すること
ができる。 According to the present invention detailed above, the second link 12
A locking member 20 is provided on the engaged surface 24 of the notch 23.
A protrusion 38 protruding to the side is provided, and the protrusion 38 is located at a position where the intersection A between the engaged surface 24 and the bottom surface 23a is separated from the lock member 2.
Since the locking member 20 comes into contact with a portion of the engaging surface 29 that is distant from the distal end surface 20a of the locking member 20, even if the protruding portion 38 becomes flat and the engaging surface 29 is deformed due to the tensile load applied to the second link 12, the locking member 20 The locking member 20 and the notch 23 are always in a normal state of engagement, and natural separation of the second link 12 can be reliably prevented. The durability of the lower link 9 can be improved.
第1図乃至第4図は本考案の第1実施例を示し
ており、第1図は使用状態を示す全体側面図、第
2図は要部の断面側面図、第3図は第2図のX−
X線断面図、第4図は第2図のY−Y線断面図、
第5図は第2実施例の要部を示す断面図、第6図
は第3実施例の要部を示す断面図、第7図は第6
図のZ−Z線断面図、第8図は第4実施例の要部
を示す断面図、第9図は第8図のS−S線断面
図、第10図は本考案の比較例を示す断面図、第
11図は比較例の要部を示す説明図である。
1…トラクタ車体、9…ロアリンク、10…ロ
アリンク本体(第1リンク)、11…筒状部、1
2…可動リンク(第2リンク)、20…ロツク部
材、20a…先端面、23…切欠部、23a…底
面、24…被係合面、29…係合面、37…凹
部、38…突起部。
1 to 4 show a first embodiment of the present invention, in which FIG. 1 is an overall side view showing the state of use, FIG. 2 is a cross-sectional side view of the main parts, and FIG. X-
An X-ray cross-sectional view, Figure 4 is a Y-Y cross-sectional view of Figure 2,
FIG. 5 is a sectional view showing the main parts of the second embodiment, FIG. 6 is a sectional view showing the main parts of the third embodiment, and FIG.
8 is a sectional view showing the main parts of the fourth embodiment, FIG. 9 is a sectional view taken along the SS line in FIG. 8, and FIG. 10 is a comparative example of the present invention. The cross-sectional view shown in FIG. 11 is an explanatory diagram showing the main parts of a comparative example. DESCRIPTION OF SYMBOLS 1... Tractor body, 9... Lower link, 10... Lower link body (first link), 11... Cylindrical part, 1
2... Movable link (second link), 20... Lock member, 20a... Tip surface, 23... Notch, 23a... Bottom surface, 24... Engaged surface, 29... Engaging surface, 37... Recess, 38... Projection .
Claims (1)
を前後2分割し、第1リンク10の端部に筒状部
11とこの筒状部11内へ進退自在なロツク部材
20とを設け、前記筒状部11内に長手方向相対
移動自在に内嵌された第2リンク12の端部にそ
の移動を阻止すべくロツク部材20と係合可能な
切欠部23を設けたロアリンクであつて、前記ロ
ツク部材20の係合面29と対向する切欠部23
の被係合面24にはロツク部材20側に突出した
突起部38が形成されており、この突起部38は
切欠部23の被係合面24と底面23aとの交差
点Aから離隔し且つロツク部材20の先端面20
aから離れた係合面29の部位と当接する位置に
形成されていることを特徴とするロアリンク。 Lower link 9 connecting work machine 6 to mobile vehicle 1
A cylindrical portion 11 and a locking member 20 that can move forward and backward into the cylindrical portion 11 are provided at the end of the first link 10, and a locking member 20 is provided inside the cylindrical portion 11 so as to be relatively movable in the longitudinal direction. The lower link is provided with a notch 23 that can be engaged with the locking member 20 to prevent the second link 12 from moving, the notch facing the engaging surface 29 of the locking member 20. Part 23
A protrusion 38 protruding toward the locking member 20 is formed on the engaged surface 24 of the notch 23, and this protrusion 38 is spaced apart from the intersection A between the engaged surface 24 of the notch 23 and the bottom surface 23a, and Tip surface 20 of member 20
A lower link characterized in that it is formed at a position that abuts a portion of an engagement surface 29 that is remote from a.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9319281U JPS6327526Y2 (en) | 1981-06-23 | 1981-06-23 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9319281U JPS6327526Y2 (en) | 1981-06-23 | 1981-06-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57203704U JPS57203704U (en) | 1982-12-25 |
JPS6327526Y2 true JPS6327526Y2 (en) | 1988-07-26 |
Family
ID=29888164
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9319281U Expired JPS6327526Y2 (en) | 1981-06-23 | 1981-06-23 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6327526Y2 (en) |
-
1981
- 1981-06-23 JP JP9319281U patent/JPS6327526Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS57203704U (en) | 1982-12-25 |
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