JP2567971B2 - Work vehicle connection structure - Google Patents
Work vehicle connection structureInfo
- Publication number
- JP2567971B2 JP2567971B2 JP2144674A JP14467490A JP2567971B2 JP 2567971 B2 JP2567971 B2 JP 2567971B2 JP 2144674 A JP2144674 A JP 2144674A JP 14467490 A JP14467490 A JP 14467490A JP 2567971 B2 JP2567971 B2 JP 2567971B2
- Authority
- JP
- Japan
- Prior art keywords
- link
- working device
- machine body
- link mechanism
- connection structure
- 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
Links
Landscapes
- Agricultural Machines (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、機体前部に駆動昇降自在なリンク機構を介
して作業装置を連結するとともに、前記作業装置に対し
て機体側から動力を供給するよう構成してある作業車の
作業装置連結構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention connects a working device to a front part of a machine body through a link mechanism that can be driven up and down, and supplies power to the work device from the machine body side. The present invention relates to a work device connection structure for a work vehicle configured to do so.
上記連結構造において、従来では、例えば特開昭59−
96068号公報に開示されるように、前記リンク機構を機
体フレーム前部の前方側に突出する状態で取付けるとと
もに、機体前部に搭載したエンジンの前部側から突出し
た出力軸から前記作業装置用のPTO軸に動力を供給する
よう構成したものがあった。In the above connection structure, conventionally, for example, Japanese Patent Laid-Open No. 59-
As disclosed in Japanese Laid-Open Patent Publication No. 96068, the link mechanism is mounted so as to project to the front side of the front part of the machine body frame, and the output shaft projecting from the front side of the engine mounted on the front part of the machine body is used for the working device. There was one configured to supply power to the PTO shaft of.
〔発明が解決しようとする課題〕 ところが、上記従来構造では、作業装置の取付箇所が
機体から前方に大きく突出した位置となり、作業装置連
結時においては機体の前後長さ大きくなる弊害があると
ともに、作業装置の昇降に伴う前後移動距離の変化によ
り、作業装置自体が重いもの、あるいは重量物を支持す
る作業装置であれば、機体重心の変化も大きくなって不
都合を招くこともあった。(Problems to be solved by the invention) However, in the above-mentioned conventional structure, the mounting position of the working device is a position that greatly protrudes forward from the machine body, and there is an adverse effect of increasing the front-rear length of the machine body when the work device is connected, If the working device itself is heavy or is a working device that supports a heavy object, the change in the center of gravity of the working device may be large due to a change in the front-back movement distance associated with the lifting and lowering of the working device, which may cause inconvenience.
本発明は、上記不具合点を解消することを目的として
いる。The present invention aims to solve the above-mentioned problems.
本発明の特徴構成は、機体前部に駆動昇降自在なリン
ク機構を介して作業装置を連結するとともに、前記作業
装置に対して機体側から動力を供給するよう構成してあ
る作業車の作業装置連結構造において、機体後方側下部
に配設したPTO軸から前記作業装置に対して動力を供給
するよう構成し、前記リンク機構を機体フレームの前部
下方側に入り込ませて装着し、さらに、前記リンク機構
を上下一対のリンク部材で構成し、下方のリンク部材を
支点間距離の長い棒状リンクに構成し、上方のリンク部
材を前記下方のリンク部材よりも支点間距離が短く、か
つ中間で屈折自在な腰折れリンクから構成し、機体固定
部側の一点と腰折れリンクの屈折点近くとに亘ってリン
ク機構駆動用の伸縮シリンダを配設した点にある。A characteristic configuration of the present invention is that a working device is connected to a front portion of a machine body via a link mechanism that can be driven up and down, and power is supplied to the work device from the machine body side. In the connection structure, it is configured to supply power to the working device from a PTO shaft arranged at the lower portion of the rear side of the fuselage, and the link mechanism is inserted into the lower front portion of the fuselage frame and attached, and The link mechanism is composed of a pair of upper and lower link members, the lower link member is a bar-shaped link with a long fulcrum distance, and the upper link member has a shorter fulcrum distance than the lower link member and bends in the middle. It is composed of a flexible waist-breaking link, and a telescopic cylinder for driving the link mechanism is arranged between one point on the machine body fixing portion side and near the bending point of the waist-breaking link.
作業装置連結用のリンク機構を機体フレームの下方側
に入り込ませてあるので、作業装置の連結箇所が機体側
に近づいた位置に設けられることになり、運転者から作
業装置までの距離が従来に較べ短くなり作業が行い安く
なる。又、作業装置に対する動力を機体後部のPTO軸か
ら供給するので、伝動を確実に行うことのできる軸伝動
構造を用いた場合であっても、継手部分で大きく屈曲さ
せる必要がない。Since the link mechanism for connecting the working device is inserted into the lower side of the machine frame, the connecting point of the working device will be provided at a position closer to the machine side, and the distance from the driver to the working device will be the same as before. Compared to this, it will be shorter and work will be cheaper. Further, since the power for the working device is supplied from the PTO shaft at the rear of the machine body, it is not necessary to bend the joint portion largely even when the shaft transmission structure capable of reliably transmitting the power is used.
しかも、上方のリンク部材を屈折可能に構成してある
から、シリンダの伸長に伴って、リンク部材が略均等に
屈折することとなり、リンク機構の上昇量の割に作業装
置の前後方向の移動量が小さくて済む。Moreover, since the upper link member is configured to be bendable, the link member bends substantially evenly as the cylinder extends, and the amount of movement of the working device in the front-rear direction relative to the amount of rise of the link mechanism. Can be small.
従って、本発明によれば、合理的な構造改良によっ
て、作業装置の駆動を円滑かつ確実に行うことができる
ものでありながら、機体全長を短く、コンパクトに構成
することができ、かつ、作業操縦操作性を向上すること
ができるものとなった。Therefore, according to the present invention, the work device can be smoothly and reliably driven by a rational structural improvement, but the overall length of the machine body can be shortened and compact, and the work control can be performed. It has become possible to improve operability.
しかも、上方のリンク部材を屈折可能に構成してある
から、リンク機構の昇降量の割に作業装置の前後移動量
を少なく構成することができる。つまり、昇降量を大き
くする手段として支点間距離の長い棒状のリンク部材を
用いると、前後方向の移動量も大きくなり、機体全体の
重量バランスに悪影響が出易いが、支点間距離が短い側
のリンク部材を屈折可能に構成すると、前後動少ない割
に大きく昇降させることができ、機体の前後バランスが
崩れ難い。Moreover, since the upper link member is configured to be bendable, the amount of forward / backward movement of the working device can be reduced for the amount of elevation of the link mechanism. In other words, if a rod-shaped link member with a long distance between fulcrums is used as a means for increasing the amount of ascent and descent, the amount of movement in the front-rear direction will also be large, and the weight balance of the entire machine body will be adversely affected, but the distance between fulcrums is shorter If the link member is configured to be bendable, the link member can be moved up and down largely while the front-back motion is small, and the front-back balance of the body is unlikely to be lost.
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１図に本発明に係る作業機の一例としての農用トラ
クタを示している。この農用トラクタは、機体前後方向
略全長に亘って延びる左右一対の機体フレーム（１），
（１）の前部上方にエンジン（２）を搭載するととも
に、機体後部にミッションケース（３）を備え、エンジ
ン（２）の動力をミッションケース（３）を介して前後
車輪（４），（５）に供給して走行駆動するよう構成
し、前後車輪（４），（５）間の機体下腹部に平行四連
リンク機構（６）を介してモーア（７）を駆動昇降自在
に連結し、かつ、機体前部に駆動昇降自在なリンク機構
（８）を介して例えばスノーブロア等の前装作業装置
（図示せず）を着脱自在に連結するよう構成してある。FIG. 1 shows an agricultural tractor as an example of a working machine according to the present invention. This agricultural tractor comprises a pair of left and right body frames (1) extending over substantially the entire length in the machine longitudinal direction.
The engine (2) is mounted above the front part of (1), and the mission case (3) is provided at the rear part of the machine body. The power of the engine (2) is passed through the mission case (3) to the front and rear wheels (4), (). 5) to drive and drive the mower (7) via the parallel four-link mechanism (6) to the lower abdomen between the front and rear wheels (4) and (5) so that the mower (7) can be driven up and down. In addition, a front working device (not shown) such as a snow blower is detachably connected to the front part of the machine body through a link mechanism (8) which can be driven up and down.
次に、前記モーア（７）の連結構造について説明す
る。第２図に示すように、モーア（７）は、牽引用の左
右一対の前リンク（6a）により機体フレーム（１）に夫
々枢支連結してあり、リフトシリンダ（９）により昇降
駆動するよう構成してある。詳述すると、前記前リンク
（6a）は前端部同志をロツド（10）で連結してあり、左
右機体フレーム（１），（１）の横側壁から下方に固定
延出した一対のブラケット（11），（11）に対して、レ
バー（12）の揺動操作により係止ロック作用状態と開放
状態とに揺動並びに固定自在に取付けたフック部材（1
3），（13）に前記ロッド（10）に引掛け係止させて枢
支連結するよう構成してある。又、第５図にも示すよう
に、前記各機体フレーム（１）（１）の前後中間におけ
る階段状屈曲部（４）の下面同士に亘って、横フレーム
（15）を横架連結するとともに、該横フレーム（15）を
左右機体フレーム（１），（１）の横側外方に突出さ
せ、その突出部（15a），（15a）の後部を上方に折曲げ
この突出部（15a），（15a）を機体フレーム（１），
（１）横側面に固着して強度を図る一方、この突出部
（15a）の縦壁部及び下面に枢支ピン（16）を一体固定
した支点取付部（17）をボルト連結してある。そして、
前記枢支ピン（16）に後リンク（6b）を枢支連結してあ
る。Next, the connection structure of the mower (7) will be described. As shown in FIG. 2, the mowers (7) are pivotally connected to the body frame (1) by a pair of left and right front links (6a) for pulling, and are lifted and lowered by a lift cylinder (9). Configured. More specifically, the front link (6a) has its front end portions connected to each other by a rod (10), and a pair of brackets (11) fixedly extending downward from the lateral side walls of the left and right body frames (1) and (1). ), (11), the hook member (1 is attached so as to be swingable and fixable between a locking action state and an open state by swinging the lever (12).
The rods (10) are hooked on the rods (3) and (13) to be locked so as to be pivotally connected. Further, as shown in FIG. 5, the horizontal frame (15) is connected horizontally across the lower surfaces of the stepped bent portions (4) in the front-rear middle of each of the body frames (1) (1). , The lateral frame (15) is projected outward from the lateral sides of the left and right body frames (1) and (1), and the rear portions of the projecting portions (15a) and (15a) are bent upward, and this projecting portion (15a) , (15a) is the fuselage frame (1),
(1) A fulcrum mounting portion (17) integrally fixed to a pivot pin (16) is bolted to the vertical wall portion and the lower surface of the projecting portion (15a) while being fixed to the lateral side surface for strength. And
A rear link (6b) is pivotally connected to the pivot pin (16).
次に、前装作業装置の連結構造について説明する。前
装作業装置連結用リンク機構（８）は、機体フレーム
（１）の前部下方側に入り込ませて装着してある。詳述
すると、第２図ないし第４図、および第８図に示すよう
に、前記モーア牽引用前リンク連結用の左右一対のブラ
ケット（11），（11）から横向き突設した支点ピン（1
8），（18）に一対のロアーリンク（19），（19）を枢
支連結するとともに、各機体フレーム（１），（１）夫
々の前部横側部に固定した支点ブラケット（20），（2
0）に、同一横軸芯（Ｐ）周りで揺動自在に揺動アーム
（21），（21）を枢支連結してある。そして、各揺動ア
ーム（21），（21）を一体揺動するべく連結部材（22）
で横架連結するとともに、機体フレーム（１）の前端面
に平面視コの字形の支持部材（23）をボルト固定し、こ
の支持部材（23）の下部に横架した横支軸（24）に油圧
シリンダ（25）の下端部を枢支してある。又、油圧シリ
ンダ（25）の上端部を前記連結部材（22）の途中部にピ
ン（26）枢支し、かつ、連結部材（22）の左右中央部
と、正面視略Ａ字形の作業装置連結フレーム（27）の上
部とを連結具（28）を介して枢支連結してある。前記作
業装置連結フレーム（27）の左右両下端部には、前記各
ロアーリンク（19），（19）の前部を枢支連結してあ
る。このように、下部リンク部材を支点間距離の長い棒
状のロアーリンク（19），（19）から構成し、上部リン
ク部材を、揺動アーム（21），（21）と連結具（28）と
からなる支点間距離の短い腰折れリンクから構成して、
前記油圧シリンダ（25）の伸縮に伴って上部リンク部材
（21），（28）を屈折させ乍ら、第７図の実線から二点
鎖線の状態へ、あるいはその逆の状態へ作業装置を昇降
駆動できるよう構成してある。Next, the connecting structure of the front working device will be described. The front working device connecting link mechanism (8) is mounted by being inserted into the lower front portion of the machine body frame (1). More specifically, as shown in FIGS. 2 to 4 and 8, a fulcrum pin (1) laterally protruding from the pair of left and right brackets (11), (11) for connecting the front link for mower towing.
A pair of lower links (19) and (19) are pivotally connected to 8) and (18), and fulcrum brackets (20) are fixed to the front lateral sides of the fuselage frames (1) and (1), respectively. , (2
The rocking arms (21) and (21) are pivotally connected to (0) so as to be rockable around the same horizontal axis (P). Then, the connecting member (22) is used to integrally swing the swing arms (21), (21).
The horizontal support shaft (24) horizontally connected to the front end face of the machine body frame (1) by bolting a U-shaped support member (23) in plan view to the lower end of the support member (23). The lower end of the hydraulic cylinder (25) is pivotally supported. Further, the upper end of the hydraulic cylinder (25) is pivotally supported by the pin (26) in the middle of the connecting member (22), and the left and right central portions of the connecting member (22) and a working device substantially in an A shape in front view. The upper part of the connecting frame (27) is pivotally connected via a connecting tool (28). The front parts of the lower links (19) and (19) are pivotally connected to the lower left and right ends of the working device connection frame (27). Thus, the lower link member is composed of rod-shaped lower links (19) and (19) having a long distance between fulcrums, and the upper link member is composed of the swing arms (21) and (21) and the connecting tool (28). Consists of a hip break link with a short distance between fulcrums,
By bending the upper link members (21) and (28) as the hydraulic cylinder (25) expands and contracts, the working device is moved up and down from the solid line in FIG. 7 to the alternate long and two short dashes state, or vice versa. It is configured so that it can be driven.
又、前記モーア（７）及び前装作業装置に対する駆動
動力は、第６図に示すように機体後部のミッションケー
ス（３）の下部に前方向きに左右並列突設したPTO軸（2
9），（30）から供給するよう構成してある。つまり、
左側PTO軸（29）から伝動軸（31）を介してモーア
（７）の入力部（7a）に動力を供給するよう連動連結
し、右側PTO軸（30）から前後に長く延びる伝動軸（3
2）を介して前装作業装置に動力を供給するよう構成し
てあり、前記モーア牽引用前リンク（6a）の支持用ブラ
ケット（11），（11）の間に前記伝動軸（32）の中継軸
受部（33）を設けてある。この中継軸受部（33）は左右
ブラケット（11），（11）の内側面に接する状態で配設
してあり、かつ、前記支点ピン（18），（18）の内方突
出部が嵌合する凹部（34），（34）を形成し、前記各ブ
ラケット（11），（11）にボルト連結してある。このよ
うに中継軸受部（33）は前装作業装置用ロアーリンク
（19），（19）の強度補強部材を兼用してある。Further, as shown in FIG. 6, driving power for the mower (7) and the front-mounted work device is provided by a PTO shaft (2
It is configured to be supplied from 9) and (30). That is,
The left PTO shaft (29) is interlockingly connected so as to supply power to the input part (7a) of the mower (7) via the transmission shaft (31), and the transmission shaft (3
2) is configured to supply power to the front mounted work device, and the power transmission shaft (32) is provided between the support brackets (11) and (11) of the mower towing front link (6a). A relay bearing portion (33) is provided. The relay bearing part (33) is arranged in contact with the inner side surfaces of the left and right brackets (11), (11), and the inward protruding parts of the fulcrum pins (18), (18) are fitted to each other. The recesses (34) and (34) are formed and bolted to the brackets (11) and (11). Thus, the relay bearing portion (33) also serves as a strength reinforcing member for the lower links (19), (19) for the front-mounted work device.
このようにして、前装作業装置用の動力取出しを機体
後部のPTO軸（30）から行うようにして、スリップ等の
生じ難い確実な伝動系となる軸伝動機構を採用するもの
でありながら継手部分で大きく屈曲させる必要がなく円
滑な動力伝達を行える利点を有し、かつ、前装作業装置
連結時での長さを短く、コンパクトなものに構成できる
ことになった。In this way, power is taken out for the front-mounted work equipment from the PTO shaft (30) at the rear of the machine body, and a shaft transmission mechanism that forms a reliable transmission system that is unlikely to cause slippage is adopted. It has an advantage that smooth power transmission can be achieved without requiring a large bend in a portion, and the length at the time of connecting the front-mounted working device is short, so that a compact structure can be configured.
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.
図面は本発明係る作業車の作業装置連結構造の実施例を
示し、第１図は農用トラクタの全体側面図、第２図は要
部の側面図、第３図は要部の正面図、第４図は中継軸受
部配設部の一部切欠正面図、第５図は後リンク連結部の
平面図、第６図はPTO軸の縦断正面図、第７図はリンク
機構の作動状態を示す説明図、第８図はリンク機構の要
部の一部切欠斜視図である。 （１）……機体フレーム、（８）……リンク機構、（1
9）……リンク部材、（21），（28）……腰折れリン
ク、（25）……シリンダ、（30）……PTO軸。The drawings show an embodiment of a work device connecting structure for a work vehicle according to the present invention. FIG. 1 is an overall side view of an agricultural tractor, FIG. 2 is a side view of a main part, FIG. 3 is a front view of the main part, and FIG. FIG. 4 is a partially cutaway front view of the relay bearing section, FIG. 5 is a plan view of the rear link connecting section, FIG. 6 is a vertical sectional front view of the PTO shaft, and FIG. 7 shows an operating state of the link mechanism. Explanatory drawing and FIG. 8 are partially cutaway perspective views of the main part of the link mechanism. (1) …… Airframe, (8) …… Link mechanism, (1
9) ... Link member, (21), (28) ... Hip break link, (25) ... Cylinder, (30) ... PTO shaft.
Claims (1)
（８）を介して作業装置を連結するとともに、前記作業
装置に対して機体側から動力を供給するよう構成してあ
る作業車の作業装置連結構造であって、機体後方側下部
に配設したPTO軸（30）から前記作業装置に対して動力
を供給するよう構成し、前記リンク機構（８）を機体フ
レーム（１）の前部下方側に入り込ませて装着し、さら
に、前記リンク機構（８）を上下一対のリンク部材（1
9），（21,28）で構成し、下方のリンク部材（19）を支
点間距離の長い棒状リンクに構成し、上方のリンク部材
（21,28）を前記下方のリンク部材（19）よりも支点間
距離が短く、かつ中間で屈折自在な腰折れリンクから構
成し、機体固定部側の一点と腰折れリンクの屈折点近く
とに亘ってリンク機構駆動用の伸縮シリンダ（25）を配
設してある作業車の作業装置連結構造。1. Work of a work vehicle configured to connect a working device to a front part of a machine body through a link mechanism (8) which can be driven up and down and to supply power to the working device from the machine body side. The device connection structure is configured to supply power to the working device from a PTO shaft (30) arranged at a lower part on the rear side of the fuselage, and the link mechanism (8) is provided under the front part of the fuselage frame (1). The link mechanism (8) is inserted into the side of the link member (1),
9), (21, 28), the lower link member (19) is a rod-like link having a long fulcrum distance, and the upper link member (21, 28) is formed from the lower link member (19). Also, it is composed of a waist bending link with a short distance between fulcrums and free bending in the middle, and an extendable cylinder (25) for driving the link mechanism is arranged between one point on the machine body fixing part and near the bending point of the waist bending link. Work vehicle connection structure for existing work vehicles.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2144674A JP2567971B2 (en) | 1990-06-02 | 1990-06-02 | Work vehicle connection structure |
| US07/675,197 US5123805A (en) | 1990-06-02 | 1991-03-26 | Frame structure for attaching a working implement |
| GB9106523A GB2244418B (en) | 1990-06-02 | 1991-03-27 | Frame structure for attaching a working implement |
| DE4117272A DE4117272C2 (en) | 1990-06-02 | 1991-05-27 | Device holding device for connecting a working device to a vehicle chassis |
| FR9106584A FR2662569B1 (en) | 1990-06-02 | 1991-05-31 | CHASSIS STRUCTURE FOR MOUNTING A WORKING TOOL, ON A TRACTOR, SUCH AS A LOADER, MOWER OR THE LIKE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2144674A JP2567971B2 (en) | 1990-06-02 | 1990-06-02 | Work vehicle connection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0440801A JPH0440801A (en) | 1992-02-12 |
| JP2567971B2 true JP2567971B2 (en) | 1996-12-25 |
Family
ID=15367608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2144674A Expired - Lifetime JP2567971B2 (en) | 1990-06-02 | 1990-06-02 | Work vehicle connection structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2567971B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106103315B (en) * | 2014-07-09 | 2017-10-31 | 细田工业株式会社 | Conveying device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930645U (en) * | 1982-08-19 | 1984-02-25 | デンヨ−株式会社 | rotor |
| JPS59171764A (en) * | 1983-03-15 | 1984-09-28 | Yanmar Diesel Engine Co Ltd | Frame structure of agricultural vehicle |
| JPS6040521U (en) * | 1983-08-23 | 1985-03-22 | ヤンマー農機株式会社 | Self-propelled work equipment |
-
1990
- 1990-06-02 JP JP2144674A patent/JP2567971B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0440801A (en) | 1992-02-12 |
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