JPH0565642U - Vehicle front-wheel drive shaft take-out device - Google Patents
Vehicle front-wheel drive shaft take-out deviceInfo
- Publication number
- JPH0565642U JPH0565642U JP1718492U JP1718492U JPH0565642U JP H0565642 U JPH0565642 U JP H0565642U JP 1718492 U JP1718492 U JP 1718492U JP 1718492 U JP1718492 U JP 1718492U JP H0565642 U JPH0565642 U JP H0565642U
- Authority
- JP
- Japan
- Prior art keywords
- wheel drive
- drive shaft
- case
- front wheel
- shaft
- 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.)
- Pending
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- Arrangement And Driving Of Transmission Devices (AREA)
Abstract
(57)【要約】
【目的】 トランスミッションケースの下面に着脱可能
に前輪駆動軸取出しケースを装着し、前後輪駆動または
後輪駆動に切替可能にした車両において、前輪駆動軸を
取出す際、組立作業性、整備性及び変速操作性を良好に
すると共に、不整地走行時に車両腹部下方の障害物によ
って前輪駆動軸及び中間伝動軸が損傷することを防止す
る。
【構成】 トランスミッションケースの下面に着脱可能
に前輪駆動軸取出しケースを装着し、前後輪駆動または
後輪駆動に切替可能にした車両において、前後輪のほぼ
中間に位置するセンターケース内に中間伝動軸を連通さ
せて、ケース内で前輪駆動軸と連結させるように構成し
た。
(57) [Abstract] [Purpose] When the front wheel drive shaft is taken out in a vehicle in which the front wheel drive shaft take-out case is detachably attached to the lower surface of the transmission case and it is possible to switch between front and rear wheel drive or rear wheel drive. The front wheel drive shaft and the intermediate transmission shaft are prevented from being damaged by an obstacle below the abdomen of the vehicle when traveling on rough terrain. [Structure] In a vehicle in which a front wheel drive shaft take-out case is detachably attached to the lower surface of the transmission case and can be switched between front-rear wheel drive and rear-wheel drive, an intermediate transmission shaft is provided in a center case located approximately in the middle of the front and rear wheels. And the front wheel drive shaft in the case.
Description
【０００１】[0001]
本考案は、前後輪駆動または後輪駆動に切替可能の建設用車両、運搬用車両、 農林業用車両等の産業用の車両の前輪駆動軸取出装置に関する。 The present invention relates to a front wheel drive shaft take-out device for an industrial vehicle such as a front-wheel drive or rear-wheel drive switchable construction vehicle, transportation vehicle, agricultural and forestry vehicle, and the like.
【０００２】[0002]
従来の、前後輪駆動または後輪駆動に切替可能の車両においては、トランスミ ッションケースの内部に前輪駆動軸の取出し部を構成するか、前輪駆動軸取出ケ ースをトランスミッションケースの下面に着脱可能に装着した場合でも、中間伝 動軸をセンターケースの下方に露出して配設し、ケースの外で前輪駆動軸と連結 させていた。 In a conventional vehicle that can be switched to front-rear wheel drive or rear-wheel drive, the front wheel drive shaft take-out case can be configured inside the transmission case, or the front wheel drive shaft take-out case can be attached to and detached from the lower surface of the transmission case. Even when mounted, the intermediate transmission shaft was exposed below the center case and was connected to the front wheel drive shaft outside the case.
【０００３】[0003]
従来のように、トランスミッションケースの内部に前輪駆動軸の取出部を構成 したものは、不具合発生時、トランスミッションケースの全分解点検が必要とな り、整備性に劣る欠点があった。また、トランスミッションケースの下面に着脱 可能に前輪駆動軸取出ケースを装着し、前後輪駆動または後輪駆動に切替可能に した場合でも、中間伝動軸をセンターケースの下方に露出して配設し、ケースの 外で前輪駆動軸と連結させたものでは、中間伝動軸が丁度前後輪の中間部に位置 するため、不整地走行時、下方からの障害物に当たり、損傷する恐れがあった。 In the conventional case where the front wheel drive shaft take-out part is configured inside the transmission case, it is necessary to completely disassemble and inspect the transmission case when a failure occurs, which is a drawback of poor maintainability. Even when the front wheel drive shaft take-out case is detachably attached to the lower surface of the transmission case and it is possible to switch between front-rear wheel drive and rear wheel drive, the intermediate transmission shaft is exposed and arranged below the center case. In the case of connecting to the front wheel drive shaft outside the case, the intermediate transmission shaft is located just in the middle of the front and rear wheels, so there is a risk of damage from hitting an obstacle from below during rough terrain travel.
【０００４】[0004]
本考案は、トランスミッションケースの下面に着脱可能に前輪駆動軸取出ケー スを装着し、前後輪駆動又は後輪駆動に切替可能にした車両において、前後輪の ほぼ中間に位置するセンターケースの下部に、前輪駆動用の中間伝動軸を挿脱可 能に嵌装し、ケース内で前輪駆動軸に、前記中間伝動軸の後端を伝動可能に嵌挿 することにより上述の課題を解決した。 The present invention is a vehicle in which the front wheel drive shaft take-out case is detachably attached to the lower surface of the transmission case and can be switched between front-rear wheel drive and rear-wheel drive. The above-described problem is solved by fitting an intermediate transmission shaft for driving front wheels so that the intermediate transmission shaft can be inserted and removed, and by inserting a rear end of the intermediate transmission shaft into the front wheel drive shaft in a case so that the intermediate transmission shaft can be transmitted.
【０００５】[0005]
エンジンからの動力は、主クラッチ、減速装置を経て、トランスミッションケ ース内で変速され、更に減速されて、一方は後輪を駆動し、他方はトランスミッ ションの下面に着脱可能に前輪駆動軸取出ケースを装着して、前輪を分岐駆動し ている。トランスミッションケース内では前後輪駆動又は後輪駆動に切替可能に なっており、その一部のギヤから前輪駆動軸に動力を伝達している。前輪駆動軸 及びそれに付随するギヤやクラッチ等を前輪駆動軸取出ケースに予め組付けて組 立品とし、これをトランスミッションケースの前方下部に着脱可能に取付けると 共に前記前輪駆動軸の前端部を、前輪駆動軸取出ケースから前方に突出させ、ト ランスミッションケースと前方のセンターケースとを組付け、クラッチハウジン グを組付ける前に、センターケースの下部内に穿設されている孔に、中間伝動軸 を挿入してケース内で前記前輪駆動軸の前端に伝動可能に嵌挿する。従って、前 輪駆動軸及び中間伝動軸は前後輪のほぼ中間の位置ではセンターケース内に収納 され、ケースの外に露出した部分がないので前輪駆動軸及び中間伝動軸の損傷の 恐れがなく、かつ、前輪駆動軸取出ケースを整備するときそれを容易に着脱する ことができると共に上方の開口部から容易に整備することができる。 The power from the engine goes through the main clutch and speed reducer, and is further speed-shifted in the transmission case and further decelerated, one driving the rear wheels and the other detachably attached to the lower surface of the transmission to the front wheel drive shaft. The case is attached and the front wheels are diverted. In the transmission case, it is possible to switch between front-rear wheel drive and rear-wheel drive, and power is transmitted from some of the gears to the front-wheel drive shaft. The front wheel drive shaft and its accompanying gears, clutches, etc. are assembled in advance to the front wheel drive shaft take-out case to form an assembly, which is detachably attached to the lower front part of the transmission case together with the front end of the front wheel drive shaft. Extend the front transmission from the front wheel drive shaft extraction case, assemble the trans mission case and the front center case, and before installing the clutch housing, insert the intermediate transmission into the hole drilled in the lower part of the center case. The shaft is inserted and fitted in the case so that it can be transmitted to the front end of the front wheel drive shaft. Therefore, the front wheel drive shaft and the intermediate transmission shaft are housed in the center case at a position approximately in the middle of the front and rear wheels, and there is no exposed portion outside the case, so there is no risk of damage to the front wheel drive shaft and the intermediate transmission shaft. Moreover, when the front wheel drive shaft take-out case is maintained, it can be easily attached and detached and can be easily maintained from the upper opening.
【０００６】[0006]
本考案の一実施例を図面について説明すると、トラクタ本体は後方からトラン スミッションケース１、センターケース２、クラッチハウジング３及びエンジン ４が一体構造としてシャシー部を構成している。トランスミッションケース１の 前部下面の開口部には前輪駆動軸取出ケース５が着脱可能に装着され、その前方 には中間伝動軸６がセンターケース２内の下部の孔に挿脱可能に遊嵌してクラッ チハウジング３の下部においてベアリング７及びオイルシール８を経て、軸端を のぞかせている。なお、前記シャシー部は左右の後輪９及び前輪１０によって支 持されている。 An embodiment of the present invention will be described with reference to the drawings. In the tractor body, a transmission case 1, a center case 2, a clutch housing 3 and an engine 4 are integrated into a chassis portion from the rear. A front wheel drive shaft take-out case 5 is removably attached to an opening in the front lower surface of the transmission case 1, and an intermediate transmission shaft 6 is loosely fitted in a lower hole in the center case 2 in front of the front wheel drive shaft take-out case 5. The shaft end is seen through the bearing 7 and the oil seal 8 in the lower part of the clutch housing 3. The chassis portion is supported by the left and right rear wheels 9 and front wheels 10.
【０００７】 前輪駆動軸取出ケース５には前後輪の周速が略同一速度となるギヤ１１と前輪 側が略２倍の速度となるギヤ１２が前輪駆動軸１３上に配設され、ピストン１４ を前方に移動させることによって前輪駆動軸１３の円周に複数個明けられた円錐 状の溝１５にギヤ１１のボス部の孔に遊嵌している複数個のボール１５ａを押し 込むことにより、ギヤ１１側の速度が得られ、また、スプラインボス１６に係合 する摩擦板１７が油圧によりピストン１４の端面の圧力を受けることによって、 ギヤ１２側の速度が得られるように構成されている。The front wheel drive shaft take-out case 5 is provided with a gear 11 on which the peripheral speeds of the front and rear wheels are approximately the same speed and a gear 12 on which the front wheel side is approximately twice the speed on the front wheel drive shaft 13, and a piston 14 By moving the balls 15a that are loosely fitted in the holes of the boss portion of the gear 11 into the conical grooves 15 formed in the circumference of the front wheel drive shaft 13 by moving the gears forward, The speed on the gear 12 side is obtained by receiving the pressure on the end face of the piston 14 by hydraulic pressure on the friction plate 17 engaged with the spline boss 16.
【０００８】 前輪駆動軸取出ケース５の上方にはギヤ１１及びギヤ１２と噛合するギヤ１８ 及びギヤ１９が副変速駆動ギヤ２０及び２１が共に同一の軸２２上に配設され、 軸２２の上方にはピニオン軸２３があり、それと噛合するリングギヤ２４及びデ フ装置を経て後輪９を駆動している。ギヤ１９は２段歯車に構成され、その内径 のスプラインボス部には軸２２の直径方向に明けられ内部のスプリング２６に押 されるボール２５と係合しギヤ１９の摺動位置を決める内径溝２７が設けられて いる。なお、ギヤ１９はピニオン軸２３上の４輪駆動ギヤ２８から軸２２に動力 を伝達すると共に、前記ギヤ１２と噛合することにより増速される。Above the front wheel drive shaft extraction case 5, a gear 18 and a gear 19 that mesh with the gear 11 and the gear 12 are arranged on the same shaft 22 as the auxiliary transmission drive gears 20 and 21, and above the shaft 22. Has a pinion shaft 23, which drives a rear wheel 9 via a ring gear 24 and a differential device which mesh with the pinion shaft 23. The gear 19 is configured as a two-stage gear, and an inner diameter groove that determines the sliding position of the gear 19 by engaging a ball 25 that is opened in the diameter direction of the shaft 22 and is pushed by an internal spring 26 at a spline boss portion of the inner diameter of the gear 19. 27 are provided. The gear 19 is accelerated by transmitting power from the four-wheel drive gear 28 on the pinion shaft 23 to the shaft 22 and meshing with the gear 12.
【０００９】 ギヤ１２のボス部は一方に延長され、円周複数個の溝には複数枚のプレッシャ プレートの山部が係合し、プレッシャプレート１枚置きに内径溝がスプラインボ ス１６に係合する複数枚の摩擦板１７が挟持されて内蔵している。スプラインボ ス１６の内径にはピストン１４の端面との間にスプリング２９が介在し、常にピ ストン１４の他端の内径傾斜面が前記ギヤ１１のボス部の孔に遊嵌している複数 個のボール１５ａを溝１５に押し込むように付勢している。一旦溝１５に押し込 まれたボール１５ａはピストン１４の内径に拘束されて溝１５から抜け出すこと は出来ない。このようにして、前輪駆動軸１３はギヤ１１と係合するので前後輪 はほぼ同一の周速となる。The boss portion of the gear 12 is extended to one side, the crest portions of a plurality of pressure plates engage with the plurality of grooves on the circumference, and the inner diameter groove is engaged with the spline boss 16 every other pressure plate. A plurality of matching friction plates 17 are sandwiched and incorporated. A spring 29 is interposed between the inner diameter of the spline boss 16 and the end face of the piston 14, and the inner diameter inclined surface at the other end of the piston 14 is always loosely fitted in the hole of the boss portion of the gear 11. The ball 15a is urged so as to be pushed into the groove 15. The ball 15a once pushed into the groove 15 is constrained by the inner diameter of the piston 14 and cannot escape from the groove 15. In this way, since the front wheel drive shaft 13 engages with the gear 11, the front and rear wheels have substantially the same peripheral speed.
【００１０】 一方、油圧回路３５から前輪駆動軸１３の内径孔を通じ、ピストン１４の内部 端面とラム３６との間に圧油を送り込むことにより、スプリング２９の付勢力に 抗してピストン１４が後方に移動する。その際、その移動量をピストン１４の前 端内周の大径がボール１５ａから図３に示すごとく少し離れる程度にすると、ギ ヤ１１から前輪駆動軸１３への伝動が断たれて二駆動状態（後輪のみ駆動）にな り、上記移動量を更に大きくすると、前記プレッシャプレートと摩擦板１７を加 圧して摩擦力によってクラッチ接合し、スプラインボス１６とギヤ１２は同一回 転速度となるので、前輪駆動軸１３は前輪側が略２倍の速度となるように駆動さ れる。このピストン１４が後方に移動する際、同時にボール１５ａは溝１５との 拘束が解除されボール１５ａが溝１５から抜け出すことになるのでギヤ１１と前 輪駆動軸１３の関係が断たれ、係合も解除されることとなる。このとき、ピスト ン１４の内径がボール１５ａが溝１５に押し込まれた時の、複数個のボール１５ ａの外接円に等しくなるように設定すると、ピストン１４の内径の加工が容易に なると共に、前輪駆動軸１３とピストン１４の同心度が確保され、高精度が得ら れる。On the other hand, by sending pressure oil from the hydraulic circuit 35 through the inner diameter hole of the front wheel drive shaft 13 to between the inner end surface of the piston 14 and the ram 36, the piston 14 moves backward against the urging force of the spring 29. Move to. At this time, if the amount of movement is such that the large diameter of the inner circumference of the front end of the piston 14 is slightly separated from the ball 15a as shown in FIG. 3, the transmission from the gear 11 to the front wheel drive shaft 13 is cut off and the two drive state is achieved. If only the rear wheels are driven and the amount of movement is further increased, the pressure plate and the friction plate 17 are pressed and the clutch is joined by the frictional force, and the spline boss 16 and the gear 12 have the same rotational speed. The front-wheel drive shaft 13 is driven so that the front-wheel side has approximately twice the speed. When the piston 14 moves rearward, at the same time, the constraint of the ball 15a with the groove 15 is released and the ball 15a comes out of the groove 15, so that the relationship between the gear 11 and the front wheel drive shaft 13 is broken, and the engagement is also lost. It will be canceled. At this time, if the inner diameter of the piston 14 is set to be equal to the circumscribing circle of the plurality of balls 15a when the balls 15a are pushed into the groove 15, the inner diameter of the piston 14 can be easily machined and The concentricity of the front wheel drive shaft 13 and the piston 14 is secured, and high accuracy is obtained.
【００１１】 上述のように前輪駆動軸取出し装置を一つの組立品として予め組込み、トラン スミッションケース１の下面の開口部から組付け、４輪駆動ギヤ２８と前輪駆動 軸１３との間に変速用のギヤ１９を介在させ、ギヤ１９の摺動操作及び油圧の操 作の併用によって、２輪駆動と４輪駆動とに切替え、並びに後輪と同一速度と倍 速との切替え可能にしたので、組立作業性が向上し、切替え操作も容易になった 。As described above, the front wheel drive shaft take-out device is incorporated in advance as one assembly, assembled from the opening on the lower surface of the transmission case 1, and the speed change is performed between the four-wheel drive gear 28 and the front wheel drive shaft 13. With the use of a gear 19 for the vehicle, it is possible to switch between two-wheel drive and four-wheel drive, and to switch between the same speed and double speed as the rear wheel, by using both sliding operation of the gear 19 and hydraulic operation. , The assembly workability has been improved and the switching operation has become easier.
【００１２】[0012]
本考案は、トランスミッションケース１の下面に着脱可能に前輪駆動軸取出ケ ース５を装着し、前後輪駆動又は後輪駆動に切替可能にした車両において、前後 輪のほぼ中間に位置するセンターケース２の下部に、前輪駆動用の中間伝動軸６ を挿脱可能に嵌装し、ケース内で前輪駆動軸１３に、前記中間伝動軸６の後端を 伝動可能に嵌挿したので、前輪駆動装置及び中間伝動軸の組立作業性、整備性及 び変速操作性が向上すると共に、前輪駆動軸１３及び中間伝動軸６は前後輪のほ ぼ中間の位置ではセンターケース２内に収納され、ケースの外に露出した部分が ないので前輪駆動軸１３及び中間伝動軸６の損傷の恐れはなくなった。 The present invention is a vehicle in which the front wheel drive shaft take-out case 5 is detachably attached to the lower surface of the transmission case 1 and can be switched between front and rear wheel drive or rear wheel drive. The intermediate transmission shaft 6 for driving the front wheels is removably fitted to the lower part of the drive wheel 2, and the rear end of the intermediate transmission shaft 6 is fitted to the front wheel drive shaft 13 in the case so that the front wheels can be driven. Assembling workability, maintenance work and gear shifting operability of the device and the intermediate transmission shaft are improved, and the front wheel drive shaft 13 and the intermediate transmission shaft 6 are housed in the center case 2 at a position approximately in the middle of the front and rear wheels. Since there is no exposed portion outside the vehicle, there is no risk of damage to the front wheel drive shaft 13 and the intermediate transmission shaft 6.
【図１】農用トラクタの動力伝達の側面断面図である。FIG. 1 is a side sectional view of power transmission of an agricultural tractor.
【図２】副変速装置の展開断面図である。FIG. 2 is a developed sectional view of an auxiliary transmission device.
【図３】前輪駆動軸装置の縦断面図である。FIG. 3 is a vertical sectional view of a front wheel drive shaft device.
【図４】伝動系統図である。FIG. 4 is a transmission system diagram.
【符号の説明】 １ トランスミッションケース ２ センターケース ５ 前輪駆動軸取出しケース ６ 中間伝動軸 １１ ギヤ １２ ギヤ １３ 前輪駆動軸 １４ ピストン １７ 摩擦板 １９ ギヤ ２８ ４輪駆動ギヤ ２９ スプリング ３５ 油圧回路 ３６ ラム[Description of symbols] 1 transmission case 2 center case 5 front wheel drive shaft extraction case 6 intermediate transmission shaft 11 gear 12 gear 13 front wheel drive shaft 14 piston 17 friction plate 19 gear 28 4 wheel drive gear 29 spring 35 hydraulic circuit 36 ram
Claims (1)
脱可能に前輪駆動軸取出ケース５を装着し、前後輪駆動
又は後輪駆動に切替可能にした車両において、前後輪の
ほぼ中間に位置するセンターケース２の下部に、前輪駆
動用の中間伝動軸６を挿脱可能に嵌装し、ケース内で前
輪駆動軸１３に、前記中間伝動軸６の後端を伝動可能に
嵌挿したことを特徴とする車両の前輪駆動軸取出装置。1. A center case 2 located approximately in the middle of front and rear wheels in a vehicle in which a front wheel drive shaft take-out case 5 is detachably attached to a lower surface of a transmission case 1 and can be switched between front and rear wheels or rear wheels. The intermediate transmission shaft 6 for driving the front wheels is removably fitted to the lower part of the vehicle, and the rear end of the intermediate transmission shaft 6 is fitted to the front wheel drive shaft 13 in the case so as to be transmitted. Vehicle front wheel drive shaft take-out device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1718492U JPH0565642U (en) | 1992-02-21 | 1992-02-21 | Vehicle front-wheel drive shaft take-out device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1718492U JPH0565642U (en) | 1992-02-21 | 1992-02-21 | Vehicle front-wheel drive shaft take-out device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0565642U true JPH0565642U (en) | 1993-08-31 |
Family
ID=11936863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1718492U Pending JPH0565642U (en) | 1992-02-21 | 1992-02-21 | Vehicle front-wheel drive shaft take-out device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0565642U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005289245A (en) * | 2004-04-01 | 2005-10-20 | Yanmar Co Ltd | Switching mechanism for conducting switching between four-wheel drive and front-wheel acceleration drive |
| WO2013018405A1 (en) * | 2011-08-04 | 2013-02-07 | 株式会社小松製作所 | Backhoe loader |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6315226B2 (en) * | 1980-06-09 | 1988-04-04 | Ishikawa Seisakusho Kk |
-
1992
- 1992-02-21 JP JP1718492U patent/JPH0565642U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6315226B2 (en) * | 1980-06-09 | 1988-04-04 | Ishikawa Seisakusho Kk |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005289245A (en) * | 2004-04-01 | 2005-10-20 | Yanmar Co Ltd | Switching mechanism for conducting switching between four-wheel drive and front-wheel acceleration drive |
| JP4519503B2 (en) * | 2004-04-01 | 2010-08-04 | ヤンマー株式会社 | Four-wheel drive / front-wheel acceleration drive switching mechanism |
| WO2013018405A1 (en) * | 2011-08-04 | 2013-02-07 | 株式会社小松製作所 | Backhoe loader |
| JP2013036498A (en) * | 2011-08-04 | 2013-02-21 | Komatsu Ltd | Backhoe loader |
| GB2496997B (en) * | 2011-08-04 | 2013-10-23 | Komatsu Mfg Co Ltd | Backhoe loader |
| US8689664B2 (en) | 2011-08-04 | 2014-04-08 | Komatsu Ltd. | Backhoe loader |
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