WO2004103757A1 - Tracteur - Google Patents

Tracteur Download PDF

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Publication number
WO2004103757A1
WO2004103757A1 PCT/JP2003/009128 JP0309128W WO2004103757A1 WO 2004103757 A1 WO2004103757 A1 WO 2004103757A1 JP 0309128 W JP0309128 W JP 0309128W WO 2004103757 A1 WO2004103757 A1 WO 2004103757A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
shaft
drive shaft
piece
transmission
Prior art date
Application number
PCT/JP2003/009128
Other languages
English (en)
Japanese (ja)
Inventor
Tatsuo Yamaguchi
Noboru Yamamoto
Bunei Katagiri
Original Assignee
Yanmar Co., Ltd.
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 Yanmar Co., Ltd. filed Critical Yanmar Co., Ltd.
Priority to AU2003255136A priority Critical patent/AU2003255136A1/en
Publication of WO2004103757A1 publication Critical patent/WO2004103757A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/28—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of power take-off
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing

Definitions

  • the present invention relates to a tractor.
  • an inner and outer double drive shaft body comprising an inner drive shaft extending in the front-rear direction and a cylindrical outer drive shaft rotatably fitted to the outer periphery of the inner drive shaft.
  • the base end of each drive shaft is linked to the prime mover
  • the leading end of the outer drive shaft is linked to the traveling system transmission mechanism
  • the tip of the inner drive shaft is the PTO transmission mechanism.
  • the clutch housing and the main transmission case are connected in the front-rear direction
  • the inner and outer double drive shafts are inserted into the clutch housing and the main transmission case
  • the tip of the inner drive shaft is connected to the outer drive shaft. It extends to a position rearward from the distal end of the PTO, and abuts against the base end of the PTO input shaft via a cylindrical coupling, and is interlockingly connected on the same axis.
  • the inner drive shaft and the PTO input shaft are interlocked in the main transmission case.
  • the distal end of the inner drive shaft extends to a position rearward from the distal end of the outer drive shaft, and abuts against the base end of the PTO input shaft via a cylindrical joint.
  • the main transmission case becomes longer in the front-to-rear direction. Disclosure of the invention
  • the inner drive shaft extending in the front-rear direction and the outer drive shaft
  • An inner and outer double drive shaft body is formed from a cylindrical outer drive shaft rotatably fitted to the circumference, and the base end of each drive shaft is interlocked with the prime mover unit and one of the drive shafts
  • the tip of the drive shaft is linked to the running transmission mechanism, and the tip of the other drive shaft is a tractor linked to the PTO transmission mechanism.
  • the inner drive shaft is divided into a front split drive shaft piece and a rear split shaft.
  • the present invention provides a tractor characterized by being formed separately from a driving shaft piece, and having both split driving shaft pieces operatively connected within an outer drive shaft.
  • the present invention is also characterized by the following configurations.
  • FIG. 1 is a side view of a tractor according to the present invention.
  • Figure 2 is a side view of the clutch and the mission.
  • FIG. 3 is an explanatory cross-sectional side view of the clutch unit and the transmission unit.
  • FIG. 4 is an explanatory cross-sectional side view of the clutch unit.
  • FIG. 5 is an explanatory cross-sectional side view of the main transmission unit.
  • FIG. 6 is a sectional rear view of the main transmission unit.
  • FIG. 7 is an enlarged sectional rear view of the upper portion of the main transmission section.
  • FIG. 8 is an explanatory cross-sectional side view of the sub transmission unit and the PTO transmission unit.
  • FIG. 9 is a cross-sectional plan view of the differential mechanism.
  • FIG. 10 is a rear view of the PTO transmission section.
  • Fig. 11 is a partially cutaway rear view of the PTO transmission section.
  • Figure 12 is a cross-sectional side view of the clutch part of the single clutch specification.
  • FIG. 13 is an explanatory side sectional view of a subtransmission portion as another embodiment.
  • FIG. 14 is an explanatory sectional side view of a subtransmission portion as another embodiment.
  • the tractor comprises an inner drive shaft extending in the front-rear direction, and a cylindrical outer drive shaft rotatably fitted to the outer periphery of the inner drive shaft.
  • the base end of each drive shaft is linked to the prime mover, the tip of one drive shaft is linked to the traveling system transmission mechanism, and the tip of the other drive shaft is the PTO system drive.
  • the inner drive shaft is divided into a front split drive shaft piece and a rear split drive shaft piece, and both split drive shaft pieces are linked and connected inside the outer drive shaft. ing.
  • the clutch housing and the main transmission case are connected in the front-rear direction, the inner and outer dual drive shafts are inserted into the clutch housing and the main transmission case, and the front divided drive shaft piece of the inner drive shaft is connected to the clutch housing and the main transmission case.
  • the split position with the rear split drive shaft piece is located near the connection between the clutch housing and the main transmission case.
  • the distal end of the front split drive shaft piece and the base end of the rear split drive shaft piece are engaged with each other and are removably linked to each other. .
  • FIG. 1 A shown in FIG. 1 is a tractor according to the present invention.
  • the tractor A is provided with a prime mover section 2 on a body frame 1 and a transmission section 4 is interlocked and connected to the prime mover section via a clutch section 3.
  • a driving unit 5 is disposed on the transmission unit 4 and a PTO transmission unit 6 is detachably connected to a rear portion of the transmission unit 4 so that the front axle case (not shown) is provided below the body frame 1.
  • a pair of left and right front wheels 7 and 7 are linked to each other via the rear axle cases 8 and 8 (see Fig. 9).
  • Connected. 10 is a front guard frame, 11 is a rear guard frame, 12 is a top link for connecting work equipment, and 13 is a lower link for connecting work equipment.
  • Reference numeral 14 denotes a work implement connecting piece.
  • the motor unit 2 has an engine 15 mounted on an airframe 1 and the engine 15 and the like are covered with a hood 16 so as to be openable and closable.
  • the clutch unit 3 rotatably supports an inner / outer double drive shaft 18 extending forward and rearward in a clutch housing 17.
  • the driving shaft body 18 is formed of an inner drive shaft 19 extending in the front-rear direction, and a cylindrical outer drive shaft 20 rotatably fitted on the outer periphery of the inner drive shaft 19.
  • the base end (front end) of one of the inner drive shafts 19 is linked to the engine 15 via a traveling clutch 21, and the front end (rear end) of the inner drive shaft 19 is described later.
  • a base end (front end) of the other outer drive shaft 20 is interlocked with the engine 15 via a PTO clutch 22.
  • the front end (rear end) of 20 is linked to a PTO transmission mechanism 52 to be described later.
  • a front end edge of a main transmission case 53 of a mission section 4 to be described later is detachably connected to a rear end edge of the clutch housing 17.
  • the part is pivotally supported by a bearing 24 disposed at a front part in the clutch housing 17, while the rear end part is pivotally supported by a bearing 25 disposed at a front part in a main transmission case 53.
  • a rear wall 27 having an opening 26 in the center is formed on the inner peripheral edge of the rear end of the clutch housing 17, and a cylindrical support 28 extending in the front-rear direction is formed on the rear wall 27.
  • the inner and outer dual drive shafts 18 are supported by the tubular support 28 to support the middle and outer peripheral surfaces.
  • the cylindrical support 28 has a front portion 28a located in the clutch housing 17 formed in a reduced diameter, while a rear portion 28b located in the main transmission case 53 has an enlarged diameter.
  • a mounting flange piece 28c is formed on the outer peripheral surface, the mounting flange piece 28c is brought into contact with the rear surface of the rear wall 27 of the clutch housing 17 from the rear, and is mounted by a mounting bolt 29.
  • the inner drive shaft 19 is divided into a front split drive shaft piece 30 and a rear split drive shaft piece 31.
  • the split drive shaft pieces 30 and 31 are interlocked and connected to each other in the outer drive shaft 20.
  • the split position of the front split drive shaft piece 30 and the rear split drive shaft piece 31 (interlocking connection position) ) Is disposed near the connection between the clutch housing 17 and the main transmission case 53, that is, in the rear portion 28 b of the cylindrical support 28.
  • the distal end of the front split drive shaft piece 30 and the base end of the rear split drive shaft piece 31 are engaged with each other and are removably linked to each other.
  • a fitting projection 30a is provided to protrude rearward on the distal end surface of the front split drive shaft piece 30, and a proximal end fitting four portion 31a is formed on the base end surface of the rear split drive shaft piece 31.
  • the fitting protrusion 30a is fitted in the base fitting recess 31a, and a spline groove 30b formed on the outer peripheral surface of the distal end of the front split drive shaft piece 30, and a rear split drive shaft piece are formed.
  • a cylindrical connector 32 whose axis is oriented in the front-rear direction is spline-fitted to a spline groove 31b formed on the outer peripheral surface of the base end portion of the base 31.
  • the outer drive shaft 20 has a front portion 20a formed along the outer peripheral surface of the inner drive shaft 19 to have a small diameter, while a rear portion 20b has a large diameter formed along the outer peripheral surface of the tubular connector 32.
  • Bearings 33 and 34 are provided between the outer peripheral surface of the rear portion 20b and the inner peripheral surface of the rear portion 28b of the cylindrical support 28.
  • the distal end of the outer drive shaft 20 extends rearward from the rear end of the cylindrical support 28, and the PTO drive gear 20c is integrally formed on the outer peripheral surface.
  • Reference numeral 35 denotes a PTO drive gear support bearing.
  • the inner drive shaft 19 is divided into the front split drive shaft piece 30 and the rear split drive shaft piece 31, and both split drive shaft pieces 30 and 31 are interlocked in the outer drive shaft 20.
  • the conventional technology that is, the front end of the inner drive shaft is extended to the position rearward from the front end of the outer drive shaft, and the input shaft of the PTO system is
  • the clutch housing 17 and the main transmission case 53 are connected in the front-rear direction, compared to the prior art in which the base housing is abutted against the base end and moved differently on the same axis, so that the clutch housing 17 and the main transmission Even when the inner and outer dual drive shafts 18 pass through the case 53, the problem that the main transmission case 53 becomes longer in the front-rear direction can be solved. You. ⁇
  • assembly work when the clutch housing 17 and the main transmission case 53 are connected as an assembly, and maintenance work performed after the connection is released are facilitated.
  • the transmission case 53 can be shortened in the front-rear direction to reduce the size of the fuselage, and the assembly unit of the main transmission case 53 can be shortened in the front-rear direction to reduce the distribution cost of the assembly unit. As a result, a large number of units can be carried in at once from outsourcing.
  • the mating projection 30a formed at the distal end of the front split drive shaft piece 30 is fitted into the base fitting recess 31a formed at the base end of the rear split drive shaft piece 31 by an inlay fitting.
  • the front divided drive shaft piece 30 and the rear divided drive shaft piece 31 that are formed by being divided can be accurately assembled and interlockedly connected.
  • traveling cylindrical operating body 36 is fitted slidably back and forth over the outer peripheral surface of the outer drive shaft 20 and the outer peripheral surface of the cylindrical support 28, and is fitted to the rear portion of the traveling cylindrical operating body 36. While the base end of the traveling clutch operating lever 37 is interlocked and connected, a clutch operating piece 36a is provided at the front end of the traveling tubular operating body 36, and the clutch operating piece 36a is connected to the passive clutch 21 of the traveling clutch 21. It is arranged in close proximity to the arm 21a. 38 is a leper support shaft.
  • the traveling clutch operating lever 37 when the traveling clutch operating lever 37 is rotated, the traveling tubular operating body 36 is slid forward, and the clutch acting piece 36a presses the passive arm 21a, and the passive arm 21a rotates.
  • the traveling clutch 21 is operated to perform a power disconnection operation.
  • a PTO tubular operating body 39 is fitted to the outer peripheral surface of the traveling tubular operating body 36 so as to be slidable back and forth, and the rear end of the PTO tubular operating body 39 is a base end of a PTO clutch action lever 40. While the parts are interlockingly connected, a clutch action piece 39a is provided at the front end of the PTO cylindrical operating body 39, and the clutch action piece 39a is arranged close to the passive arm 22a of the PTO clutch 22. ing. 41 is a lever support shaft. In this way, when the PTO clutch operation lever 40 is rotated, the PTO tubular operating body 39 is slid forward, and the clutch operation piece 39a presses the passive arm 22a, and the passive arm 22a rotates. As a result, the PTO clutch 22 is powered off.
  • the mission section 4 includes a main transmission mechanism 46 and an auxiliary transmission mechanism 47 which are sequentially extended from the front to the rear in a cylindrical transmission case 45 extending in the front-rear direction. And a differential mechanism 48, and a creep transmission section 49 is detachably attached to the same transmission case 45, and a creep transmission mechanism 50 provided in the tally transmission section 49 is interlocked with the auxiliary transmission mechanism 47.
  • a transmission system transmission mechanism 51 that can perform a main transmission, an auxiliary transmission, and a cleaving transmission is formed by coupling the transmission drive system 51 and a PTO transmission between the outer drive shaft 20 and a PTO transmission unit 6 described later.
  • the mechanism 52 is interposed.
  • the mission case 45 is divided into a main transmission case 53 containing a main transmission mechanism 46 and a case body 54 containing a sub transmission mechanism 47 and a differential mechanism 48.
  • the front body 53 is detachably connected to the rear end of the clutch housing 17 by a connection bolt 56a, and the case body 54 is provided with a support wall forming body at the rear end of the main variable speed case 53.
  • the front edge is detachably connected via a connecting bolt 56b.
  • the main transmission case 53 is formed in a tubular shape extending in the front-rear direction, and has an internal support wall 57 formed on the inner peripheral surface of the front part.
  • a main transmission mechanism 46 is interposed between the wall forming body 55 and the main transmission mechanism 46 so that a plurality of steps (five steps in this embodiment) of forward shifting operation and reverse switching operation can be performed. .
  • the main transmission mechanism 46 supports the front end (rear end) of the rear split drive shaft piece 31 via the bearing 25 at the center of the internal support wall 57.
  • the 5th speed gear 31c is integrally formed on the outer peripheral surface of the distal end portion of the rear split drive shaft piece 31 located behind the ring 2 ⁇ , and the distal end fitting recess 31d is formed on the rear end face of the rear split drive shaft piece 31.
  • the fitting projection 58a formed by projecting forward from the base end surface (front end surface) of the main transmission main shaft 58 extending in the front-rear direction in the fitting recess 31d on the distal end side is rotated around its axis. While being freely fitted, the front end (rear end) of the main transmission main shaft 58 is rotatably supported around the axis thereof at the center of the support wall forming body 55 via a bearing 59.
  • the main transmission main shaft 58 is provided with fourth, third, and second 'first speed gears 60, 61, 62, 63 and a reverse switching gear 64 sequentially from the base end toward the front end. It is mounted coaxially at intervals in the direction and rotatable around the outer peripheral surface of the main transmission main shaft 58.
  • the main transmission main shaft 58 is provided with a third variable body 65 disposed between the fifth speed gear 31c and the fourth speed gear 60, and disposed between the third speed gear 61 and the second speed gear 62. And a first transmission 67 disposed between the first speed gear 63 and the reverse switching gear 64.
  • each of the transmission bodies 65, 66, 67 is composed of a shaft-side interlocking connecting piece 65a, 66a, 67a interlockingly connected to the main transmission main shaft 58, and a front and rear gear side interlocking connection interlockingly connected to each of the gears adjacent to the front and rear.
  • Each of the slide connecting pieces 65d, 66d, and 67d is connected to the neutral position positioned on each of the shaft-side interlocking connecting pieces 65a, 66a, and 67a, and to each of the shaft-side interlocking connecting pieces 65a, 66a, and 67a and the front gear-side interlocking piece.
  • a front slide shift position in which the slide members are interlocked and connected to each other by sliding the slide members between the connection members 65b, 66b, and 67b, and the shaft-side interlocking connection members 65a, 66a, and 67a and the rear gear-side interlocking connection members 65c, 66c,
  • the slide position is located between the front and the rear 67c, and the slide operation is possible to one of the rear slide shift positions where the two are linked and connected.
  • a main transmission sub shaft 70 extending in the front-rear direction is supported between the internal support wall 57 and the support wall forming body 55 via front and rear bearings 68 and 69.
  • the first, second and third transmission gear bodies 71, 72, and 73 are coaxially and rotatably mounted on the outer peripheral surface of 70.
  • the front gear 71a and the rear gear 71b integrally formed with the first transmission gear body 71 are combined with the fifth speed gear 31c and the second speed gear 60, respectively, and are also integrated with the second transmission gear body 72.
  • the formed front gear 72a and rear gear 72b are engaged with the third speed gear 61 and the second speed gear 62, respectively, and the front gear 73a integrally formed with the third transmission gear body 73 is the first gear 73a.
  • a rear gear 73b integrally formed with the third speed change gear body 73 is connected to a reverse switching gear 64 via a counter gear 74 which is supported by the support wall member 55 while being engaged with the speed gear 63.
  • 75 is a counter gear support shaft
  • 76 is a shaft support provided in the main transmission case 53.
  • a slide body support shaft 80 extending in the front-rear direction is provided immediately above the main speed change main shaft 58.
  • the lever interlocking shaft 81 extending in the front-rear direction is slidable back and forth in the right and left directions of the slide body support shaft 80, and is slidable back and forth in the orientation.
  • the distal end of the engaging piece 82 protruding leftward from the front of the shaft 81 is engaged with the engaged piece 83 provided at the front of the slide body support shaft 80, while extending into the case body 54.
  • An action receiving piece 84 is provided at the rear end of the provided lever interlocking shaft 81, and an action piece 85 a formed at the lower end of the main transmission lever 85 is engaged with the action receiving piece 84.
  • Reference numeral 97 denotes an operation receiving piece mounting pin.
  • a swing support 86 is provided on the ceiling portion 54c of the case body 54, and as shown in FIG.
  • the lower part of the main transmission lever 85 is pivotally supported, and the main transmission lever 85 can be freely moved in the front, rear, left and right directions.
  • the lower end of the action piece 85a formed at the lower end of the main transmission lever 85 is attached to the ceiling. It penetrates through a lever hole 88 formed in the portion 54c and is engaged with the action receiving piece 84.
  • 89 is a lever neutral return spring.
  • a slide regulating body 91 having a side opening 90 and formed in a C-shape as viewed from the rear side is fitted in the middle of the slide body support shaft 80.
  • a slide action piece 92 is projected radially from the slide body support shaft 80 through the side opening 90.
  • first, second, and third slide bodies 95, 94, and 93 are sequentially attached to the slide body support shaft 80 from the rear to the front so as to be freely slidable in the axial direction.
  • the slide body 93 is arranged forward of the slide regulating body 91 ', while the first and second slide bodies 95 and 94 are arranged rearward of the slide regulating body 91.
  • each of the slide bodies 95, 94, and 93 is slidably fitted to the slide body support shaft 80, and the bosses 95a, 94a, and 93a are moved downward from the bosses 95a, 94a, and 93a. It is provided with shift forks 95b, 94b, 93b formed by extension, and slide action receiving pieces 95c, 94c, 93c formed by extending from the respective bosses 95a, 94a, 93a toward the slide regulating body 91. ing.
  • the first 'second' third slide member 9 5, 94, 93 each shift Tofuoku 95b of, 94b, 93 b are each slide of the first 'second' third shift member 67,66,65 It is linked to the connecting pieces 67d, 66d, 65d.
  • first and second 'third slide member%, 9 each slide action receiving member 95c of 4,93, 94c, 9 3 c is by rotating the slide body support shaft 80 around an axis Sly
  • the slide action piece 92 and the slide regulating body 91 in a required direction the slide action piece 92 is engaged with one required slide action receiving piece and The slide is operated in conjunction with the sliding movement of the slide body support shaft 80 in the forward and backward directions, and at least one of the restriction pieces 91a and 91b protruding from the slide and slide restriction bodies 91 is attached to the other two slide action receiving pieces.
  • Reference numeral 96 denotes a regulating protruding piece that is suspended from the ceiling portion 54c of the case body 54 in order to regulate the movement of the slide regulating body 91 in the axial direction.
  • the main transmission mechanism 46 is configured as described above, and the following describes the shift operation (first shift operation to fifth shift operation and reverse switching operation) of the main transmission mechanism 46.
  • the main shift lever 85 is turned upright in the rearward direction while standing upright, and the turning operation force is applied to the operating piece 85a formed at the lower end of the main shift lever 85 ⁇ the action receiving piece 84 ⁇ reper linkage.
  • the shaft 81 ⁇ the engagement piece 82 ⁇ the engaged piece 83 ⁇ is transmitted to the slide body support shaft 80, and the slide body support shaft 80 is slid forward.
  • the power transmitted from the engine 15 to the inner drive shaft 19 is converted into the front split drive shaft piece 30 ⁇ the rear split drive shaft piece 31—the fifth speed gear 31c—the front gear 71a of the third transmission gear body 71 ⁇ Main transmission counter shaft 70 ⁇ Front gear 73a of 1st transmission gear body 73 ⁇ 1st speed gear 63 ⁇ Front gear side interlocking connection piece 671) of 1st transmission body 67 ⁇ Slide connection piece 67d ⁇ Shaft side interlocking connection piece 67a ⁇ Main transmission
  • the first transmission is transmitted to the main shaft 58.
  • the slide action piece 92 is engaged with the slide action receiving piece 95c of the first slide body 95, and the formation pieces 91a and 91b of the slide control body 91 are connected to the second and third slide pieces.
  • the sliding action receiving pieces 94c and 93c of the bodies 94 and 93 are engaged with each other, so that the movement of the slide bodies 94 and 93 is restricted.
  • the main shift lever 85 is turned to the right, and the operating piece 85a formed at the lower end of the main shift lever 85 is turned to the left with the swing support piece 87 as a fulcrum, and the turning power is received.
  • Piece 84 ⁇ lever interlocking shaft 81 ⁇ engagement piece 82 ⁇ engaged piece 83 ⁇ slide body support shaft 80, and turn the slide body support shaft 80 clockwise in the rear view of Fig. 7.
  • the slide regulating body 91 is also rotated clockwise via the slide action piece 92.
  • the slide action piece 92 is engaged with the slide action receiving piece 94c of the second slide body 94, and the formation piece 91b of the slide regulating body ⁇ is moved to the first 'third slide body 95 , 93 are engaged with the slide action receiving pieces 95c, 93c, and the movement of both slide bodies 95, 93 is regulated.
  • the slide action piece 92 is engaged with the slide action receiving piece 94c of the second slide body 94, and the regulating piece 91b of the slide control body 91 is connected to the first 'third slide body. Engagement with the slide action receiving pieces 95c, 93c of the 95, 93 restricts the movement of both the slide bodies 95, 93.
  • the main shift lever 85 is rotated leftward, and the operating piece 85a formed at the lower end of the main shift lever 85 is rotated rightward with the swing support piece 87 as a fulcrum, and the rotational power is received.
  • Piece 84 ⁇ by transmitted to the lever interlocking shaft 81 ⁇ engagement pieces 8 2 ⁇ engaged piece 83 ⁇ Surai de body support shaft 80, the same slide body support shaft 80, the rear view of FIG. 7, counterclockwise At the same time, the slide regulating body 91 is also rotated counterclockwise via the slide action piece 92.
  • the power transmitted from the engine 15 to the inner drive shaft 19 is transmitted to the front split drive shaft piece 30 ⁇ the rear split drive shaft piece 31 ⁇ the fifth speed gear 31 c ⁇ the rear gear of the third speed change gear body 71.
  • 71b ⁇ 4th speed gear 62 ⁇ 3rd speed changer 65 rear gear side linking piece 65 ⁇ 3 ⁇ slide linking piece 65d ⁇ shaft side linking link 65a ⁇ main transmission main shaft 58 Is made.
  • the slide action piece 92 is engaged with the slide action receiving piece 93c of the third slide body 93, and the regulating piece 91a of the slide control body 91 is connected to the first and second slide bodies.
  • the sliding action receiving pieces 95c, 94c of the 95, 94 are engaged to regulate the movement of both the sliding bodies 95, 94.
  • the power transmitted from the engine 15 to the inner drive shaft 19 is transmitted to the front split drive shaft piece 30 ⁇ the rear split drive shaft piece 31 ⁇ the fifth speed gear 31c ⁇ the front gear side interlocking connection of the third transmission 67.
  • the gear 6513 is transmitted to the slide coupling piece 67d ⁇ the shaft-side interlocking coupling piece 65a ⁇ the main transmission main shaft 58, and the fifth speed change is performed.
  • the slide action piece 92 is engaged with the slide action receiving piece 93c of the third slide body 93, and the regulating piece 91a of the slide control body 91 is attached to the first and second slide bodies.
  • the sliding action receiving pieces 95c, 94c of the 95, 94 are engaged, and the movement of both the sliding bodies 95, 94 is regulated.
  • the main shift lever 85 is rotated in the forward direction with the main shift lever 85 standing upright, and the turning operation force is applied to the action piece 85a formed at the lower end of the main shift lever 85 ⁇ the action receiving piece 84 ⁇ a series of levers. It is transmitted to the moving shaft 81 ⁇ the engagement piece 82 ⁇ the engaged piece 83 ⁇ the slide body support shaft 80, and the slide body support shaft 80 is slid backward.
  • the power transmitted from the engine 15 to the inner drive shaft 19 is converted into the front split drive shaft piece 30—the rear split drive shaft piece 31 ⁇ the fifth speed gear 31c ⁇ the front gear 71a of the third speed change gear body 71 ⁇ Main transmission countershaft 70 ⁇ Rear gear 73b of first transmission gear 73 ⁇ Counter gear 74 ⁇ Reverse switching gear 64 ⁇ Rear gear side interlocking connecting piece 67 ⁇ Third transmission body 67 ⁇ Slide connecting piece 67d ⁇ Shaft side
  • the interlocking link 67a is transmitted to the main transmission main shaft 58, and the main transmission main shaft 58 is rotated in the reverse direction, so that reverse switching is performed.
  • the slide action piece 92 is engaged with the slide action receiving piece 95c of the first slide body 95, and the forming pieces 91a and 91b of the slide control body 91 are connected to the second and third slides.
  • the sliding action receiving pieces 94c and 93c of the bodies 94 and 93 are engaged with each other, so that the movement of the slide bodies 94 and 93 is restricted.
  • the case body 54 includes a cylinder extending in the front-rear direction.
  • a shaft support wall 100 is formed in the middle of the inner peripheral surface, and in the same case body 54, a sub-transmission mechanism 4a is disposed at a position in front of the shaft support wall 100, and A differential mechanism 48 is provided behind the coaxial support wall 100.
  • An opening 101 is formed in the right side wall 54b of the case body 54 located in front of the shaft support wall 100, and a creep transmission unit 49, which will be described later, is detachably attached through the opening 101.
  • An opening 102 is formed in the bottom portion 54d, and a front wheel drive power take-out portion 103, which will be described later, is attached through the opening 102.
  • the creep speed change portion 49 and the front wheel drive power take-out portion 103 are respectively provided. It is linked to the auxiliary transmission mechanism 47.
  • openings 104, 104 are formed in the left and right side walls 54a, 54b, respectively, of the case body 54 located rearward of the shaft support wall 100, and through the openings 104, 104, respectively.
  • the rear axle cases 8, 8 are connected to each other, and the rear axles 105, 105 extending in the left-right direction are passed through the rear axle cases 8, 8 and supported rotatably. , 105 are linked to the differential mechanism 48.
  • a maintenance opening 106 is formed in the ceiling of the case body 54 located behind the shaft support wall 100, and the opening 106 is detachably attached to the cover 107.
  • a lift arm support 108 is formed by swelling upward, and a lift arm support with its axis oriented in the left-right direction is placed above the lift arm support 108.
  • the shaft 109 is penetrated and rotatably supported, and base ends of a pair of left and right lift arms 110 are attached to left and right ends of the lift arm support shaft 109.
  • the PTO transmission section 6 is attached to an opening 111 formed at the rear end of the case body 54.
  • port ⁇ link connecting pins 112, 112 are protruded outward, and a pair of left and right lower links 13, 13 is formed.
  • the front end is rotatably supported by the case body 54 via the lower link connecting pins 112, 112.
  • the auxiliary transmission mechanism 47 is provided at the front end (rear end) of the main transmission main shaft 58.
  • the auxiliary transmission shaft I IS is interlocked and connected via a planetary gear mechanism 115, and the tip of the main transmission main shaft 58 extends rearward to form a sun gear 117 that forms a part of the planetary gear mechanism 115.
  • the auxiliary transmission shaft 116 is arranged on the same axis as the main transmission main shaft 58, and has a middle portion supported by a shaft support 118 provided in the case body 54 via a bearing 119, and has a tip portion ( The rear end) is supported by the shaft support wall 100 via a bearing 120.
  • the planetary gear mechanism 115 is mounted on the support wall forming body 55 with a pair of front and rear inner gear supports 121 and 122 formed in a ring shape and arranged on the outer periphery of the sun gear 117 by mounting bolts 123 oriented in the front and rear direction.
  • both inner gears 124 are supported between both inner gear supports 121 and 122, a plurality of planetary gears 125 are arranged at intervals in the circumferential direction of the inner gears 124, and each planetary gear 125 is connected to the inner gear 124.
  • a sun gear 117, and a carrier 128 is mounted between inner peripheral edges of a pair of front and rear inner gear supports 121 and 122 via a pair of front and rear bearings 126 and 127, and a plurality of planetary gears 125 are mounted on the carrier 128. It is integrally linked and connected.
  • the carrier 128 has a rear end edge extending rearward of the rear bearing 127 to form a cylindrical gear forming piece 129, and has an internal tooth 130 on the inner peripheral surface of the gear forming piece 129.
  • the outer teeth 131 as a creep drive gear are formed on the outer peripheral surface of the gear forming piece 129.
  • a cylindrical shift gear support 132 is spline-fitted between the outer peripheral surface of the sun gear 117 and the outer peripheral surface of the base end (front end) 114 of the auxiliary transmission shaft 116 so as to be shiftable in the axial direction.
  • the front shift gear 133 is integrally formed on the front outer peripheral surface of the shift gear support 132
  • the rear shift gear 134 is integrally formed on the rear outer peripheral surface.
  • a fork shaft 135 having an axis directed forward and rearward is disposed on the right side in the case body 54.
  • a base end 137 of the shift fork 136 is slidably attached to the front and rear, and a front end 138 of the shift fork 136 is engaged with a shift gear support 132.
  • a lid 139 which forms a part of the cleave transmission section 49 described later has an axial line extending in the left-right direction.
  • a boss portion 140 is formed, and a lever support shaft 141 is inserted into the boss portion 140, and a base end portion of the auxiliary transmission lever 142 is attached to an outer end of the lever support shaft 141, and the lever support shaft
  • the base end of the interlocking arm 143 is attached to the inner end of the 141, and the base end 137 of the shift fork 136 is connected to the front end of the interlocking arm 143 via the frame 144.
  • the shift gear support 132 is shifted in the front-rear direction to perform the sub-transmission operation.
  • the shift gear support 132 is shifted to a state of being bridged between the outer peripheral surface of the sun gear 117 and the outer peripheral surface of the base end (front end) 114 of the auxiliary transmission shaft 116, and the shift gear support 1 A state in which the sun gear 117 and the auxiliary transmission shaft 116 are interlocked and connected via the transmission 32 (a state in which the main transmission main shaft 58 and the auxiliary transmission cause II 6 are directly connected).
  • the shift gear support 132 is detached from the outer peripheral surface of the sun gear 117 and is shifted on the outer peripheral surface of the base end (front end) 114 of the sub-variable shaft 116, and the front shift gear 133 Are engaged with the internal teeth 130 formed on the inner peripheral surface of the gear forming piece 129.
  • the reduced speed power is transmitted from the main transmission main shaft 58 to the auxiliary transmission shaft 116 via the planetary gear mechanism 115, and the auxiliary transmission is performed.
  • the creep transmission portion 49 performs a creep speed change (an ultra-low speed change).
  • the creep speed change portion 49 is provided with a cover 101 at an opening 101 formed in the right side wall of the case main body 54 as shown in FIGS. 8, 10 and 11.
  • the cover 139 is removably attached by mounting bolts 145 to close the lid, and a creep speed change mechanism 146 is detachably attached to the inner surface of the lid 139.
  • the creep transmission mechanism 146 includes a pair of front and rear shaft support pieces 147 and 148 protruding from the inner surface of the cover 139, and a detachably mounted gear support shaft 149 whose axis is oriented in the front-rear direction.
  • a creep transmission gear body 151 is rotatably mounted on the 149 via a bearing 150, and a large-diameter input gear 152 and a small-diameter output gear 153 are integrally formed at the front and rear portions of the creep transmission gear body 151. ing.
  • the input gear 152 is detachably engaged with the external teeth 131 as a creep drive gear formed on the outer peripheral surface of the gear forming piece 129, and the output gear 153 is connected to the auxiliary transmission shaft 116 via the bearing 154. It is detachably coupled to a rotatable creep transmission gear 155, and a rear shift gear 134 integrally formed on the rear outer peripheral surface of the shift gear support 132 is fitted into the front surface of the creep transmission gear 155. A mating engagement gear 156 is formed.
  • the shift gear support 132 is detached from the outer peripheral surface of the sun gear 117 and is shifted on the outer peripheral surface of the base end (front end) 114 of the sub-variable shaft 116, and the rear shift gear 134 is creeped. After being fitted into a fitting gear 156 formed on the front surface of the transmission gear 155, Combine.
  • the power reduced to an extremely low speed is transmitted from the main transmission main shaft 58 to the auxiliary transmission shaft 116 via the planetary gear mechanism 115 and the creep transmission mechanism 146, and the creep transmission is performed. .
  • the creep transmission mechanism 146 is connected to the planetary gear.
  • the compact structure can be arranged around the peripheral portion of the mechanism 115, so that the size of the mission portion 4 can be prevented from being increased.
  • the speed change operation mechanism can be simplified.
  • a creep speed change mechanism 146 is attached to the lid 139 to form a creep speed change section 49.
  • the cleave speed change section 49 is configured such that the cover 139 is detachably attached to an opening 101 formed in the case body 54. Since the lid is closed, the assemblability of the creep transmission section 49 can be improved.
  • the cleave transmission mechanism 146 is detached from the lid 139, and the lid 139 is attached to the opening 101 of the case body 54.
  • the specifications can be easily changed to the specifications without them.
  • the creep speed change mechanism 146 may be attached to the lid 139, and specifications with and without creep can be easily set.
  • the front wheel drive power take-out portion 103 is provided at the bottom of the case body 54.
  • a take-out part case 160 is attached to an opening 102 formed in the part by a mounting bolt 161, and a front wheel drive shaft 164 that is oriented in the front-rear direction through a pair of front-rear bearings 162 and 163 in the take-out part case 160.
  • the first and second intermediate gears are mounted between the input gear 165 and the output gear 166 attached to the rear of the auxiliary transmission shaft 116 by mounting the input gear 165 in the middle of the front wheel drive shaft 164. 167 and 168 are interposed.
  • the first intermediate gear 167 is rotatably mounted on a PTO system transmission shaft 169 described later via a bearing 170
  • the second intermediate gear 168 is formed as a pair of front and rear parts formed to protrude into the case body 54.
  • a gear support shaft 173 is mounted on the gear support pieces 171 and 172, and is rotatably mounted on the gear support shaft 173 via a bearing 174.
  • the output gear 166, the first intermediate gear 167, the second intermediate gear 168, and the input gear 165 are connected in series and linked.
  • the front wheel drive shaft 164 has a front end 175 protruding forward from the extraction case 160, and the front end 175 is connected to an input shaft (not shown) provided on the front axle case via a transmission shaft or the like. Linked and linked.
  • the rotational power of the auxiliary transmission shaft 116 is output from the output gear 166 attached to the auxiliary transmission shaft 116 ⁇ the first intermediate gear 167 ⁇ the second intermediate gear 168 ⁇ the input gear 165 ⁇ the front wheel drive shaft 164 ⁇ the transmission Shafts, etc. are transmitted to the input shaft ⁇ front axle ⁇ front wheels 7, 7 so that four-wheel drive travel can be performed.
  • the input gear 165 is splined in the middle of the front wheel drive shaft 164.
  • the input gear 165 can be shifted to a position where the input gear 165 is engaged with the second intermediate gear 168 and a position where the engagement is released.
  • the shift operation of the input shaft 165 can be performed by a shift operation mechanism (not shown) from outside the extraction unit case 160.
  • the differential mechanism 48 is interposed between the auxiliary transmission shaft 116 and the pair of left and right rear axles 105, 105, and extends rearward from the shaft support wall 100.
  • An output bevel gear 180 is integrally formed at the tip (rear end) of the sub-transmission shaft 116, and rear axle input gears 181 and 181 are attached to the base end of each rear axle 105. Output bevel gear 180 via the differential mechanism 48 to each rear axle input gear.
  • the differential mechanism 48 attaches a large reduction gear 183 that matches the output bevel gear 180 to the outer peripheral surface of the differential case 182, and a small differential gear 182 extending in the front-rear direction inside the differential case 182.
  • a pair of front and rear small differential gears 185, 185 are rotatably mounted via a support shaft 184, and a pair of left and right large differential gears are extended via a pair of left and right large differential gear shafts 186, 186 extending in the left-right direction.
  • Gears 187, 187 are attached, and each large differential gear 187, 187 is combined with both small differential gears 185, 185.
  • each large differential gear support shaft 186, 186 is detachably connected to a traveling brake 192, 192 of a brake unit 191, 191 described later.
  • a pair of left and right cylindrical shaft supports 189, 189 are attached to the left and right side walls 54a, 54b of the case body 54. It is fitted from the outside to the formed mounting openings 194, 194, and is removably mounted with the mounting bolts 195, 195.
  • the differential case 182 is detachably mounted between the two cylindrical shaft supports 189, 189. It is erected.
  • the cylindrical shaft supports 189, 189 can be removed from the case body 54 by pulling them outward from the mounting openings 194, 194.
  • the large differential gear shafts 186, 186 can also be removed by pulling them out of the differential case 182 integrally with the cylindrical shaft supports 189, 189.
  • the differential case 182 detachably mounted between the two cylindrical shaft supports 189, .189 is formed on the ceiling of the case body 54 after each cylindrical shaft support 189, 189 is removed. It can be removed from the maintenance opening 106.
  • the brake unit 191 has a travel brake 192 disposed in a brake case 196, and the travel brake 192 can be braked and released by a brake operation lever 198 via a brake action piece 197. Like that.
  • Reference numeral 199 denotes a brake lever support shaft pivotally supported by the brake case 196.
  • the brake case 196 is detachably attached to the side wall of the case body 54 and the base of the outer peripheral surface of the rear axle case 8 in a state of being bridged.
  • the traveling brake 192 can be detached from the distal end of the large differential gear support shaft 186 integrally with the brake case 196.
  • the differential mechanism 48 has a configuration in which the large reduction gear 183 is attached to the output bevel gear 180 from the right side as shown in FIG. 9 (a), and as shown in FIG. 9 (b).
  • the differential mechanism 48 may be turned upside down and turned left and right, and the large reduction gear 183 may be combined with the output bevel gear 180 from the left side and mounted. Like that.
  • the PTO transmission unit 6 detachably mounts the PTO case 200 to the opening 111 formed at the rear end of the case body 54, and A PTO transmission mechanism 201 is disposed in a PTO case 200.
  • the PT ⁇ case 200 is formed of a front case forming body 202 arranged to be accommodated in the case main body 54 and a rear case forming body 203 arranged to protrude rearward from the case main body 54.
  • a flange-shaped mounting piece 204 is integrally formed on the peripheral edge of the front end of the rear case forming body 203, and the mounting piece 204 is brought into contact with the rear edge of the case body 54 from the rear, and in the front-rear direction. It is mounted with mounting bolts 205 facing the axis.
  • the PTO case 200 is detachably attached to the opening 111 formed at the rear end of the case body 54 in this manner, the assembling work of the PTO transmission groove 201 housed in the PTO case 200 is performed. Maintenance work can be easily performed.
  • a top link bracket 206 for pivotally connecting the front end of the top link 12 is provided between the rear portion of the lift arm support 108 and the upper portion of the rear end edge of the case body 54.
  • the top link bracket 206 has a plate-shaped mounting seat 207 that is in contact with the rear part of the lift arm support 108 and the upper part of the rear end edge of the case body 54 and is mounted with mounting bolts 210.
  • the seat 207 is formed of a pair of left and right plate-like pivots and connecting pieces 208, 208 projecting rearward from the rear surface of the seat 207. 209 is a connection hole.
  • the lower portion of the mounting seat 207 is brought into contact with the mounting piece 204 of the rear case forming body 203 from the rear to form a superposed state, and is fastened together with the mounting bolt 205 to be mounted on the rear edge of the case body 54. I have.
  • lift cylinder supports 211, 211 serving as lift cylinder mounting portions are provided to protrude outward, and the lift cylinder supports 211, 211 and the lift arms 110, 211 are provided.
  • Lift cylinders 212, 212 that extend and contract in the up-down direction are provided between the middle part 110 and the middle part 110.
  • 213 is the lift cylinder connecting pin
  • 214 is the lift cylinder It is a tri-cylinder pivot connection piece.
  • a pair of left and right lift cylinders 212, 212 that expand and contract in the vertical direction are arranged at the left and right lateral positions of the rear case forming body 203, and the lower ends of the lift cylinders 212, 212 are connected to the lift cylinder support shafts. Since it is supported by the rear case forming body 203 via the 211, the lift cylinders 212, 212 can be easily placed in a vertical or substantially vertical position, and the stroke of each lift cylinder 212, 212 can be reduced. Therefore, the size of each of the lift cylinders 212 can be reduced, and the power loss can be reduced.
  • the lift cylinders 212 can be firmly supported. .
  • the left and right widths of the rear case forming body 203 are reduced, and a pair of left and right lift cylinders 212 and 212 are arranged at the left and right lateral positions of the rear case forming body 203, and the left and right sides are within the left and right width of the case body 54.
  • the degree of freedom of the mounting position of the lifting link mechanism to the case main body 54 can be increased.
  • the PTO transmission mechanism 201 includes an input shaft 220, a transmission shaft 221 and a PTO shaft 222 whose axes are oriented in the front-rear direction in a PTO case 200. Are pivoted through bearings 223, 224, 225, 226, 227, and 228, respectively.
  • the input shaft 220 extends forward from the input shaft projection 239 formed on the front wall of the PTO case 200. While the tip 240 protrudes, the PTO shaft 222 projects the tip 242 rearward from the PTO shaft protrusion 241 formed on the rear wall of the PTO case 200.
  • the output gear 229 is provided on the input shaft 220, and the large-diameter input gear 230, the first transmission gear 231 and the second transmission gear 232 are coaxially mounted on the transmission shaft 221. Coupled with gear 229.
  • a shift gear body 233 is spline-fitted to the PTO shaft 222 in the axial direction so as to be freely shiftable, and an input gear 235 is rotatably mounted via a bearing 234.
  • the large-diameter shift gear 236 and the small-diameter shift gear 237 are provided on the shift gear body 233, and the engagement gear 238 into which the small-diameter shift gear 237 is fitted is formed on the front surface of the input gear 235.
  • the first gear shift operation in which the large-diameter shift gear 236 is engaged with the first gear shift 231 and the small-diameter shift gear 237 is engaged with the engagement gear 238 by the PTO gear shift operation mechanism (not shown).
  • the second PTO speed change operation to be combined can be performed.
  • the distal end 240 of the input shaft 220 is linked to the outer drive shaft 20 via a PTO transmission shaft 169 to form a PTO transmission mechanism 52, and the PT ⁇ transmission
  • the transmission shaft 169 is arranged in the transmission case 45 from the front to the rear in such a manner that the transmission shaft 169 is oriented in the front-rear direction.
  • the PTO-system transmission shaft 169 is formed by connecting the first to fourth divided transmission shafts 245, 246, 247, 248 in the front-rear direction.
  • the first split transmission shaft 245 is rotatably mounted between the rear wall 27 of the clutch housing 17 and the internal support wall 57 via bearings 249 and 250.
  • An input gear 244 is provided in the middle of the first split transmission shaft 245, and the input gear 244 is combined with the PTO drive gear 20c.
  • the second split transmission shaft 246 allows the support wall forming body 55 to rotatably support the intermediate portion via the bearing 251 and the front end portion to the second end. It is connected to the rear end of the one-piece transmission shaft 245 via a first tubular connector 252.
  • the third split transmission shaft 247 allows the shaft support 118 to rotatably support an intermediate portion via a bearing 253, and a front end of the third split transmission shaft 246 to the second split transmission shaft 246.
  • the rear end is connected via a second tubular connector 254.
  • the fourth split transmission shaft 248 has a front end connected to a rear end of the third split transmission shaft 247 via a one-way clutch 255 and a rear end.
  • the distal end 240 of the input shaft 220 is connected via a third tubular connector 256.
  • the one-way clutch 255 is attached to the rear end of the third split transmission shaft 247.
  • the coupling piece 260 projecting from the front surface of the rear clutch forming body 258 is coupled in a front-rear direction, so that the coupling pieces 259, 260 are engaged in the forward rotation so that the third and fourth divided transmission shafts 247, 248 are rotated. -While rotating physically in the forward rotation direction, the reverse rotation prevents both mating pieces 259 and 260 from engaging.
  • the power transmitted from the engine 15 to the outer drive shaft 20 is transferred to the PTO drive gear 20c formed integrally with the outer drive shaft 20, the input gear 244, the first split transmission shaft 245, and the first cylinder.
  • the power transmitted to the input shaft 220 is converted into the output gear 229 ⁇ the large-diameter input gear 230 ⁇ the speed change shaft 221 ⁇ the first speed change gear 231 ⁇ the shift gear
  • the large-diameter shift gear 236 of the body 233 is transmitted to the PTO shaft 222, and power can be taken out from the PTO shaft 222 to drive various working machines.
  • the power transmitted to the input shaft 220 is output from the output gear 229 ⁇ the large-diameter input gear 230 ⁇ the speed change shaft 221 ⁇ the second speed change gear 232 ⁇
  • the power is transmitted from the gear 235 to the small-diameter shift gear 237 of the shift gear body 233 to the PTO shaft 222, and power can be taken out from the PTO shaft 222 to drive various working machines.
  • the power is transmitted from the PTO shaft 222 to the traveling system transmission mechanism 51 including the main transmission mechanism 46.
  • the trouble that the traveling system transmission mechanism 51 is damaged or the like can be prevented.
  • the input gear 244 provided on the first split transmission shaft 245 is combined with the PTO drive gear 300 provided on the rear split drive shaft piece 31.
  • the first split transmission shaft 245 ⁇ input gear 244 ⁇ PTO drive gear 300 ⁇ rear split drive shaft piece 31 ⁇ main transmission 58 Can be prevented.
  • FIG. 13 shows a subtransmission mechanism 47 as another embodiment.
  • the subtransmission mechanism 47 is provided with a planetary gear mechanism 265 for subtransmission at a front end (rear end) of a main transmission main shaft 58.
  • the auxiliary transmission shaft 116 is interlockingly connected via a planetary gear mechanism 266 for creep transmission.
  • the tip of the main transmission main shaft 58 is extended rearward to form one of the planetary gear mechanisms 265 for auxiliary transmission.
  • a sun gear 267 which constitutes the same part, and an intermediate shaft 269 is arranged on the same axis line between the main transmission main shaft 58 and the auxiliary transmission shaft 116 via a planetary gear mechanism support 268 to form the intermediate gear 269.
  • the tip is a sun gear 270 that forms part of a planetary gear mechanism 266 for creep speed change.
  • the sub-gear planetary gear mechanism 265 includes an inner gear support 273 formed in a ring shape and disposed on the outer periphery of the sun gear 267 on the support wall forming body 55 by a mounting bolt 274 having an axis oriented in the front-rear direction. Attach the inner gear support 273 to support the inner gear 275 in a cantilever manner, arrange a plurality of planetary gears 276 at intervals in the circumferential direction of the inner gear 275, and connect each planetary gear 276 to the inner gear.
  • the carrier 277 is attached to the inner peripheral edge of the inner gear support 273 while being combined with both the 275 and the sun gear 270.
  • a plurality of planet gears 276 are integrally linked to the carrier 277.
  • the carrier 277 has a rear end edge portion extending rearward to form a cylindrical gear forming piece 278, and has an internal tooth 279 formed on the inner peripheral surface of the gear forming piece 278.
  • a cylindrical shift gear support 281 is spline-fitted between the outer peripheral surface of the sun gear 267 and the outer peripheral surface of the base end (front end) 280 of the intermediate shaft 269 so as to be able to shift in the axial direction.
  • the shift gear 282 is formed integrally with the front outer peripheral surface of the shift gear support 281.
  • the planetary gear mechanism 266 for creep speed change is mounted on the planetary gear mechanism support 268 by a mounting bolt 284 formed in a ring shape and disposed on the outer periphery of the sun gear 270 with an axial line oriented in the front-rear direction.
  • the inner gear support 283 supports the inner gear 285 in a cantilever manner, a plurality of planetary gears 286 are arranged at intervals in the circumferential direction of the inner gear 285, and each planetary gear 286 is connected to the inner gear 285 and the sanitary gear 285.
  • a carrier 287 is attached to the inner peripheral edge of the inner gear support 283, and a plurality of planetary gears 286 are integrally connected to the carrier 287.
  • the carrier 287 has a rear end edge extending rearward to form a cylindrical gear forming piece 288, and has an internal tooth 289 formed on the inner peripheral surface of the gear forming piece 288.
  • a cylindrical shift gear support 290 is spline-fitted between the outer peripheral surface of the sun gear 270 and the outer peripheral surface of the base end (front end) 114 of the auxiliary transmission shaft 116 so as to be shiftable in the axial direction.
  • the shift gear 291 is integrally formed on the front outer peripheral surface of the shift gear support 290.
  • the shift gear support 281 is shifted in the front-rear direction so that the sub-transmission operation can be performed.
  • the shift gear support 281 is bridged between the outer peripheral surface of the sun gear 267 and the outer peripheral surface of the base end (front end) 280 of the intermediate shaft 269.
  • the state is shifted to the sun gear 267 and the intermediate shaft 269 via the shift gear support 281.
  • Are linked the main transmission main shaft 58 and the intermediate shaft 269 are directly connected). Therefore, at this shift position, power is transmitted from the sun gear 267 integrally formed with the main transmission main shaft 58 to the intermediate shaft 269 via the shift gear support 281.
  • the shift gear support 281 is detached from the outer peripheral surface of the sun gear 267 and shifted on the outer peripheral surface of the base end (front end) 280 of the intermediate shaft 269.
  • the shift gear 282 is engaged with the internal teeth 279 formed on the inner peripheral surface of the gear forming piece 278.
  • the rotational power of the sun gear 267 integrally formed with the main transmission main shaft 58 is transmitted by the planetary gear 276 which is combined with the sun gear 267 ⁇ the carrier 277 ⁇ the gear forming piece 278 which is integrally formed with the carrier 277.
  • the tooth 279 is transmitted to the shift gear 282 of the shift gear support 281 ⁇ the shift gear support 281 ⁇ the proximal end 280 of the intermediate shaft 269.
  • the reduced power is transmitted from the main transmission main shaft 58 to the intermediate shaft 269 via the planetary gear mechanism 265, and the subtransmission is performed.
  • the shift gear support 290 of the planetary gear mechanism 266 for creep shifting is placed between the outer peripheral surface of the sun gear 270 and the outer peripheral surface of the base end (front end) 114 of the auxiliary transmission shaft 116. And the sun gear 270 and the auxiliary transmission shaft 116 are interlocked and connected via the shift gear support 290.
  • the creep shift (very low speed shift) is performed by the planetary gear mechanism 266 for creep shift.
  • the shift gear support 281 is disengaged from the outer peripheral surface of the sun gear 267 and shifts onto the outer peripheral surface of the base end (front end) 114 of the sub-transmission shaft 116.
  • the shift gear 282 is engaged with the internal teeth 289 formed on the inner peripheral surface of the gear forming piece 288. Therefore, at this shift position, the rotational force of the sun gear 270 integrally formed with the intermediate shaft 269 is changed by the planetary gear 286, the carrier 287, and the gear forming piece 288 integrally formed with the sun gear 270.
  • the internal gear 289 is transmitted to the shift gear 291 of the shift gear support 290 ⁇ the shift gear support 290 ⁇ the proximal end 114 of the auxiliary transmission shaft 116.
  • the reduced power is transmitted from the intermediate shaft 269 to the sub-transmission shaft 116 via the planetary gear mechanism 266, and a creep speed change (an ultra-low speed change) is performed.
  • FIG. 14 shows a subtransmission mechanism 47 as another embodiment.
  • the subtransmission mechanism 47 has a planetary gear mechanism 265 at the front end (rear end) of the main transmission main shaft 58.
  • the sub-transmission shaft 116 is interlocked and connected through the sub-transmission shaft 116, and has the same basic configuration as the sub-transmission mechanism 47 of the above-described embodiment, except that a planetary gear mechanism 266 for creep transmission and an intermediate shaft 269 are provided. It is essentially different in that it does not have a cleave shifting function.
  • the planetary gear mechanism 265 for the sub-transmission is configured such that the cylindrical shift gear support 281 is disposed between the outer peripheral surface of the sun gear 267 and the outer peripheral surface of the base end (front end) 114 of the sub-transmission shaft 116.
  • the shift gear 282 is integrally formed on the front outer peripheral surface of the shift gear support 281.
  • the shift gear support 281 is shifted in the front-rear direction to perform the sub-transmission operation.
  • the shift gear support 281 is separated from the outer peripheral surface of the sun gear 267, and is shifted over the outer peripheral surface of the base end (front end) 114 of the sub-transmission shaft 116.
  • the shift gear 282 is engaged with the internal teeth 279 formed on the inner peripheral surface of the gear forming piece 278.
  • the rotational power of the sun gear 267 integrally formed with the main transmission main shaft 58 is transmitted by the planetary gear 276 which is combined with the sun gear 267 ⁇ the carrier 277 ⁇ the gear forming piece 278 which is integrally formed with the carrier 277.
  • the tooth 279 is transmitted to the shift gear 282 of the shift gear support 281 ⁇ the shift gear support 281 ⁇ the base end (front end) 114 of the auxiliary transmission shaft 116.
  • the inner drive shaft is formed by being divided into a front split drive shaft piece and a rear split drive shaft piece, and the two split drive shaft pieces are connected to each other by an outer drive shaft. It is interlockingly connected within the driving shaft.
  • the inner drive shaft is divided into the front split drive shaft piece and the rear split drive shaft piece in the outer drive shaft, and the two split drive shaft pieces are interlocked and connected.
  • Conventional technology that is, a state in which the distal end of the inner drive shaft extends to a position rearward of the distal end of the outer drive shaft and abuts against the base end of the PTO input shaft via a cylindrical shaft coupling
  • the clutch housing and the main transmission case are connected in the front-rear direction as compared with the conventional technology in which the clutch housing and the main transmission case are connected on the same axis.
  • the problem that the main transmission case becomes longer in the front-to-rear direction can be eliminated even when the vehicle is passed through the vehicle.
  • the clutch housing and the main transmission case are connected in the front-rear direction, and the inner and outer double drive shafts are inserted into the clutch housing and the main transmission case '.
  • the split position of the front split drive shaft piece and the rear split drive shaft piece of the inner drive shaft is set near the connection between the clutch housing and the main transmission case. Are placed.
  • the split position of the front split drive shaft piece and the rear split drive shaft piece of the inner drive shaft is located near the connection between the clutch housing and the main transmission case, so that the main transmission case
  • the length of the main transmission case can be shortened in the front-rear direction, reducing the logistic cost of the assembly kit. As a result, a large number of units can be carried in at once from outsourcing.
  • the front end portion of the front split drive shaft piece and the base end portion of the rear split drive shaft piece are engaged with each other in an intaglio manner so that they can be detachably connected to each other.
  • the split drive axle and the rear split drive axle can be accurately assembled and interlocked.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement Of Transmissions (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

L'invention concerne un tracteur comportant un boîtier de transmission principal compact, dans lequel un arbre d'entraînement intérieur est divisé en des pièces d'arbre d'entraînement avant et arrière et les deux pièces d'arbre d'entraînement divisé étant verrouillées entre elles dans un ordre d'entraînement extérieur, l'arbre d'entraînement intérieur étant divisé en une pièce d'arbre d'entraînement avant et une pièce d'arbre d'entraînement arrière dans l'arbre d'entraînement extérieur et les deux pièces d'arbre d'entraînement divisé étant verrouillées entre elles, de sorte qu'un défaut tel que l'allongement du boîtier de transmission principal dans le sens longitudinal puisse être éliminé même lorsqu'un logement d'embrayage est relié au boîtier de transmission principal dans le sens longitudinal et qu'un corps d'arbre d'entraînement double intérieur et extérieur est inséré dans ce logement et le boîtier de transmission principal.
PCT/JP2003/009128 2003-05-21 2003-07-17 Tracteur WO2004103757A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003255136A AU2003255136A1 (en) 2003-05-21 2003-07-17 Tractor

Applications Claiming Priority (2)

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JP2003-143917 2003-05-21
JP2003143917A JP4347608B2 (ja) 2003-05-21 2003-05-21 トラクタ

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Publication Number Publication Date
WO2004103757A1 true WO2004103757A1 (fr) 2004-12-02

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Publication number Priority date Publication date Assignee Title
JP2007015520A (ja) 2005-07-06 2007-01-25 Yanmar Co Ltd トラクタ
JP5090634B2 (ja) * 2005-07-06 2012-12-05 ヤンマー株式会社 トラクタ
KR102675188B1 (ko) 2019-08-09 2024-06-13 주식회사 대동 사륜 구동 작업차의 트랜스 미션

Citations (6)

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Publication number Priority date Publication date Assignee Title
JPS57121932A (en) * 1981-01-19 1982-07-29 Mitsubishi Agricult Mach Co Ltd Tractor
JPS5954314U (ja) * 1982-10-02 1984-04-10 ヤンマーディーゼル株式会社 農用トラクタ−のカツプリング装置
JPS60164016A (ja) * 1984-02-07 1985-08-27 Fuji Electric Co Ltd 回転軸のカツプリング結合装置
JPS61166233U (fr) * 1985-04-04 1986-10-15
JPH01317832A (ja) * 1988-06-20 1989-12-22 Mitsubishi Agricult Mach Co Ltd 農用トラクタにおける伝動装置
JP2002127771A (ja) * 2000-10-20 2002-05-08 Yanmar Agricult Equip Co Ltd トランスミッション

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57121932A (en) * 1981-01-19 1982-07-29 Mitsubishi Agricult Mach Co Ltd Tractor
JPS5954314U (ja) * 1982-10-02 1984-04-10 ヤンマーディーゼル株式会社 農用トラクタ−のカツプリング装置
JPS60164016A (ja) * 1984-02-07 1985-08-27 Fuji Electric Co Ltd 回転軸のカツプリング結合装置
JPS61166233U (fr) * 1985-04-04 1986-10-15
JPH01317832A (ja) * 1988-06-20 1989-12-22 Mitsubishi Agricult Mach Co Ltd 農用トラクタにおける伝動装置
JP2002127771A (ja) * 2000-10-20 2002-05-08 Yanmar Agricult Equip Co Ltd トランスミッション

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