WO2002074572A1

WO2002074572A1 - Riding rice transplanter

Info

Publication number: WO2002074572A1
Application number: PCT/JP2001/008074
Authority: WO
Inventors: Osamu Takeuchi
Original assignee: Yanmar Agricultural Equipment Co.,Ltd.
Priority date: 2001-03-15
Filing date: 2001-09-17
Publication date: 2002-09-26
Also published as: KR20020091272A; KR100799641B1; JP2002272217A; CN1429157A; TWI236339B; JP4782298B2; CN100488797C

Abstract

A riding rice transplanter, wherein a crutch mechanism for a transmission case is provided that prevents the size of the body from enlarging, and is easy to attach/detach and improved in assembling performance at manufacturing and in maintainability at inspection; and wherein, in order to positively prevent seizure at friction portions such as a friction plate and a friction unit, an input shaft (56) is allowed to protrude from the opposite side surfaces of a transmission case (6), a speed change mechanism (13) is provided on one side of the input shaft (56) and between an engine (5) and the shaft and a crutch mechanism (14) is provided on the other side thereof, and an oil channel (163) allowing a crutch chamber (87) to communicate with the crutch mechanism (14) housed in the crutch chamber is provided in the wall surface (6b) of the transmission case (6).

Description

Description Passenger rice transplanter technical field

The present invention relates to a riding rice transplanter, and more particularly, to a mounting structure of a clutch mechanism in a mission case and a lubricating structure. Technology background

In a conventional riding type rice transplanter, a transmission clutch mechanism that changes the power from the engine and transmits the power to the front and rear wheels includes a clutch between the output shaft of the engine and the input shaft to the mission case. In addition, an external clutch mechanism that becomes a belt tension clutch is interposed, or the input shaft in the transmission case has a double structure, and an internal clutch is provided in the middle of the transmission path to disconnect and connect the power from the engine. Had to do.

The clutch mechanism provided inside the mission case is lubricated with lubricating oil that is injected into the mission case and circulated.

However, the former external clutch mechanism has a problem in that the transmission member, which is a pulley, is always rotating on the same side as the input side of the input shaft, so a large space is required and the aircraft becomes larger. there were.

On the other hand, since the latter internal clutch mechanism is fixed inside the transmission case, it cannot be easily attached / detached, resulting in poor assemblability during manufacturing and maintenance during inspection.

In addition, since the internal clutch mechanism is fixed inside the transmission case, it cannot be easily attached / detached, resulting in poor assemblability at the time of production and maintenance at the time of inspection. When working in a field with severe weather, there was a problem that the oil level on the internal clutch mechanism was remarkably high, and the oil level rose completely from the oil level, causing seizure. Disclosure of the invention

The present invention relates to a transmission rice transplanter that inputs power from an engine to a transmission case and transmits power to the front and rear wheels by shifting within the transmission case. A shaft is protruded, and a clutch mechanism is provided on a protruding portion of the transmission shaft. The clutch mechanism is covered by a detachable cover member.

Also, the present invention provides a riding rice transplanter that inputs power from an engine to a transmission case and transmits power to a front wheel and a rear wheel by shifting within the transmission case, wherein an input shaft is provided from both sides of the transmission case. A transmission mechanism between the engine and the engine is provided on one side of the input shaft, and a clutch mechanism is provided on the other side, and a transmission shaft serving as an input shaft is provided from at least one side of the mission case. A clutch mechanism is removably provided at a protruding portion of the transmission shaft, and a support for supporting the transmission shaft is provided inside a mission case. An adjacent transmission shaft which is one shaft transmission downstream from the transmission shaft is provided. The adjacent support to be supported at least partially overlaps the outside of the clutch of the clutch mechanism in a side view, and the adjacent support is provided inside the transmission case. .

Further, according to the present invention, in a riding rice transplanter that inputs power from an engine to a transmission case and transmits power to a front wheel and a rear wheel by shifting within the transmission case, the input shaft is provided from one side of the transmission case. A transmission shaft is protruded, a clutch mechanism is provided on a protruding portion of the transmission shaft, and an oil passage communicating the clutch chamber accommodating the clutch mechanism with the mission case is provided on a wall of the mission case in which the clutch mechanism is provided. The oil passage is disposed in a third quadrant of the wall surface in a left side view in a traveling direction of the vehicle in a mission case in a stable running posture. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an overall side view of a riding rice transplanter according to the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a schematic perspective view of a transmission case on a vehicle body frame, and FIG. 5 is a left side view of the entire case, FIG. 6 is a left side view of the front of the case, and FIG. 7 is a view of the case. 8 is an exploded cross-sectional view of the entire case, FIG. 9 is an exploded cross-sectional view of the front of the case, and FIG. 10 is a plan view of the rear of the case. Fig. 11 is an exploded cross-sectional view showing the power transmission configuration from the input shaft to the PTO output shaft at the front of the mission case. Fig. 12 is an exploded cross-sectional view showing the clutch mechanism. FIG. 13 is a plan exploded cross-sectional view showing a power transmission configuration from the auxiliary transmission shaft to the main transmission shaft at the front of the transmission case, and FIG. Fig. 15 is a left side view of the front of the fuselage showing the clutch operation by the main clutch pedal, and Fig. 16 is a left side view of the front of the fuselage showing the clutch / brake operation by the seedling lever. Fig. 17 shows the main clutch pedal Fig. 18 is a left side view of the entire mission case showing the lubrication configuration of the clutch mechanism, and Fig. 19 is the oil in the clutch chamber in a stable running posture. FIG. 20 is a left side view of the front of the transmission case showing the position of the oil surface of the clutch chamber in an inclined posture. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings.

First, the overall structure of a riding rice transplanter according to the present invention will be described with reference to FIGS.

The riding rice transplanter includes a traveling vehicle 1 and a planting section 9 connected to a rear portion of the traveling vehicle 1. A front wheel 2 and a rear wheel 3 are suspended at the front and rear of the traveling vehicle 1, respectively, and an engine 5 as a power unit is mounted at the front of the body frame 4.

A transmission case 6 formed long in the front-rear direction is disposed substantially in the left and right center of the body frame 4 behind the engine 5, a front wheel 2 is supported at a front portion of the mission case 6, and a rear wheel 3 is provided at a rear portion. Supported. On both sides of the hood 22 that covers the engine 5, spare seedling mounting stands 90 are arranged, and the mission case 6 and the like are covered by the body canopy 20. A driver's seat 7 is provided in the upper rear part of the vehicle body cover 20, and a steering handle 8 is provided behind the hood 22 in front of the vehicle body cover 20. Have been.

The planting section 9 is composed of a seedling mounting table 91 that is four-row planted, a plurality of planting claws 93, and the like. The planting transmission frame 92 is supported by the planting transmission frame 92 through the guide rail 95 and the guide rail 96 so that it can slide back and forth. It is located at the rear of frame 92.

Therefore, the front wheel 2 and the rear wheel 3 are driven and moved, and at the same time, the seedlings for one plant are taken out from the seedling mounting table 91, which can reciprocate left and right, with the planting claws 93, and the seedling is continuously planted Can be done.

A hitch 94 is provided at the front of the planting transmission frame 92 via a rolling fulcrum shaft 17. The hitch 94 includes a top link 11 pivotally supported on the top of the hitch 94 and a hitch 94. 9 4 It is connected to the rear of the traveling vehicle 1 via a lifting link mechanism 10 including a lower link 11 pivotally supported at the lower part.

Of these, the top link 11 is pivotally supported on the upper part of the rear U-shaped rear frame 43 when viewed from the rear, while the lower link 12 has a triangular support 12 a at the front when viewed from the side. A front part of the support 11 a is pivotally supported by a lower part of the rear frame 43, and an upper part of the support 12 a is provided with an elevating cylinder 1 for driving the elevating link mechanism 10 up and down. 5 are connected. The rear frame 43 is connected via a mounting plate 39 to a rear axle case 38 provided integrally with a rear portion of the mission case 6.

With such a configuration, the elevating link mechanism 10 forms a parallel link that can be moved up and down, so that the planting posture of the planted seedling does not change even when the planted plant is moved up and down according to the unevenness of the field. Further, the rear frame 43 is also used as a support portion of the lifting link mechanism 10, so that the planting portion 9 can be moved up and down stably, the number of parts is reduced, and the configuration is simplified. A reinforcing arm 1 2b is connected between the upper portion of the support 1 1a and the rear end of the mouth link 1 2 so as to increase the rigidity of the lower link 1 2. .

The main body shift lever 75, the seedling inheritance lever 76, the auxiliary shift lever 72, the planting lifting lever 77, the main clutch pedal 74, Brake pedals 73 etc. are arranged, and below the planted part 9, a center float 9 7 for leveling the planted part 9 at a certain height and side floats 98, 999 are arranged. It is set up. The center float 97 is disposed on the center line of the traveling vehicle 1 in the left and right direction, and the side floats 98, 99 are arranged at symmetrical positions of the center float 97 to improve the right and left balance of the planting portion 9. The planting posture is stabilized to ensure accurate nucleation.

Next, in the riding rice transplanter having such an overall configuration, the configuration of each part related to the transmission case 6 will be described.

First, the configuration of attaching the mission case 6 to the traveling vehicle 1 will be described with reference to FIGS.

The vehicle body frame 4 to which the transmission case 6 is attached includes a substantially U-shaped front frame 40 that is expanded in a plan view, and a pair of left and right side frames 4 1. 42 and the rear frame 43.

The front ends of the side frames 41, 42 are connected to the back of the front frame 40, and the center of the side frames 41, 42 in the front-rear direction is behind the side 41a, 42a. Is bent upward and the side frame 4 1 · 4

The upper end on the closed side of the rear frame 43 is connected to the rear end of 2.

The center connection frame is located behind the center of the front and back direction 4 1 a and 4 2 a.

The front connecting frame 45 is suspended from the front of the front connecting frame 45 in front of the front-rear substantially central portion 4 1a and 42a. And a stepped L-shape in plan view between the front frame 40 and both end portions of the front frame 40.

9 is interposed and fixed. A square pipe-shaped holding portion is provided outside the stay 29.

28 are fixed, and the support 90 a of the spare seedling mounting table 90 is fitted into the holding portion 28 so as to be fixed.

In addition, a reinforcing plate 47 is provided at a portion of the front connecting frame 45 extending from both sides of the side frames 4 1 and 4 2, and the holding plate 2 is provided by the reinforcing plate 47.

8 and the side frame 4 1-4 2 are firmly connected, and the column of 90

90a can be securely supported and fixed. Further, a flat support member 50 extends substantially horizontally from the left and right center of the front frame 40 toward the rear downward, and the engine 5 is mounted and fixed on the support member 50. The rear end of the support member 50 is supported by the connecting frame 45, and the support member 50 is provided with openings 50a and 50b in order from the front.

The openings 50a-5Ob are used to reduce the weight of the entire body and promote the heat radiation effect of the engine 5. Further, since the support member 50 has a flat plate shape, it can be used as a protective cover under the engine 5 and can reduce the number of parts and weight as compared with a case where a separate protective cover is provided. In addition, the number of assembling steps can be reduced, leading to cost reductions.

In such a configuration, the front end of the mission case 6 is connected to the mounting member 49 provided on the upper surface of the rear end of the support member 50, and the front and rear middle part of the mission case 6 is The center connecting frame 46 is connected to a lower portion of a mounting member 48 provided substantially at the center in the machine width direction.

The base of a hydraulic lifting cylinder 15 for raising and lowering the planting section 9 is connected to the upper part of the mounting member 48. Further, as described above, the rear portion of the transmission case 6 is connected to the lower end of the rear frame 43 by the mounting plate 39 via the rear axle case 38 provided integrally.

That is, by connecting the front, rear and center of the mission case 6 to the body frame 4, the transmission case 6 functions as an effective strength reinforcing member of the rice transplanter together with the body frame 4, and the horizontal position of the body frame 4 The rigidity and strength in the vertical and torsional directions are greatly improved.

Next, the schematic structure of the mission case 6 will be described with reference to FIGS. 1, 5 to 10. FIG.

A transmission chamber 60 in which various transmission mechanisms are provided is formed at the front of the mission case 6, and a front axle case 37 is integrally fixed to both left and right sides of the transmission chamber 60. ing. An axle case is fixed below the left and right ends of the front axle case 37, and a front wheel axle 66 for fixing the front wheel 2 is supported at the lower end of the axle case. On the other hand, as described above, a cylindrical rear axle case 38 having an axial center in the left-right direction is formed at the rear end of the mission case 6, and inside the rear axle case 38, A side clutch mechanism 79 and an intermediate shaft 31 are provided in this order from the front. Reduction gears 32 are fixedly provided at both left and right ends of the intermediate shaft 31. The reduction gears 32 are coupled to the reduction gears 33. The reduction gears 33 have the rear wheel 3 at an outer end. After being fixed, it is fixed to the inner end of the wheel drive shaft 69. A final case 16 that supports the rear wheel drive shaft 69 is covered outside the reduction gears 32-33.

As described above, when the front axle case 37 and the rear axle case 38 are provided integrally with the mission case 6, the front and rear wheels 2 and 3 can be supported by the transmission case 6, as described above. Since a part of the frame as the body strength reinforcing member can be carried, the burden on the body frame 4 can be reduced. Further, a planting transmission chamber 34 is formed on the right side of the transmission chamber 60, and a planting PTO shaft 65 having a shaft center in the front-rear direction is provided at the rear of the planting transmission chamber 34. The rear end of the planting PT0 shaft 65 is connected to the planting section 9 via a PT0 transmission shaft or the like (not shown) to transmit power for driving the seedling planting device. ing. Similarly, a fertilizer transmission chamber 201 is formed on the left side of the transmission chamber 60, and a fertilizer PTO shaft 202 having a longitudinal axis at the rear of the fertilizer transmission chamber 201 is pivotally supported. The rear end of the PT〇 shaft 202 is connected to a lateral fertilizer 205 behind the driver's seat 7 via a transmission or the like, and a power for driving the lateral fertilizer 205 is provided. To communicate.

In this way, the PTO shaft 65 and the PTO shaft 202 are all extended rearward from the side of the mission case 6, so that when the planting part 9 is moved up and down, Power can be transmitted stably without interference.

Next, the configuration of power input into the transmission case 6 will be described with reference to FIGS. 1, 3, and 4. FIG.

An engine 5 is placed and fixed on the support member 50, and an output shaft 52 projects from the engine 5 on the left side. A pair of dish-shaped conical bosses are provided on the output shaft 52. A drive pulley 53 is fixedly provided.

On the other hand, an input shaft 56 protrudes from the front of the transmission case 6 to the side. Similarly, a driven pulley 55 composed of a pair of dish-shaped conical pulleys is attached to the force shaft b6, and a belt 54 is provided between the driven pulley 55 and the driving pulley 53. It is wound to form a belt-type continuously variable transmission mechanism 13.

Then, in the belt-type continuously variable transmission mechanism 13, by changing the groove width formed between the conical pulleys, the effective diameter of each pulley 5 3 The power from the engine 5 can be shifted and input.

Next, a power transmission configuration in the transmission case 6 will be described with reference to FIGS. 4 to 6, FIGS. 9 to 11, and FIG.

As shown in FIG. 4 to FIG. 6 and FIG. 11, in the transmission chamber 60, the sub transmission shaft 63 and the main transmission shaft 61 are arranged in parallel in the lower rear of the input shaft 56 in order. Behind the auxiliary transmission shaft 63, a reverse shaft 67, an inter-stock transmission shaft 68, and a PTO output shaft 6 are also supported in parallel in this order.

One end of the input shaft 56 is connected to a belt-type continuously variable transmission mechanism 13 as described above.

The drive bulge 53 on the engine 5 side and the driven bulge 55 on the mission case 6 are arranged substantially in a straight line, and the front wheel 2 and the rear wheel 3 The power transmission path for transmitting power to the vehicle has a space-saving and efficient arrangement.

Further, the other end of the input shaft 56 protrudes rightward and outward from the mission case 6, and a clutch mechanism 14 is provided at the protruding portion. A double gear 1 2 1 consisting of a diameter gear 1 2 1 a 'small diameter gear 1 1 1 b is arranged, and a loose fitting gear 1 1 is formed from an input shaft 56 by a clutch mechanism 14 described later in detail. The power transmission up to 21 can be connected and disconnected.

That is, in a riding rice transplanter that inputs power from the engine 5 to the transmission case 6 and shifts power in the transmission case 6 to transmit power to the front wheels 2 and the rear wheels 3, the input shaft is input from one side of the transmission case 6. 5 The transmission shaft that becomes 6 protrudes, and the clutch mechanism 14 is provided at the projecting portion of the transmission shaft, so that the clutch mechanism 14 can be easily accessed from the outside. Compared to the case where it is provided, the ease of assembly during manufacturing and the ease of maintenance during inspection are improved. In addition, in a riding rice transplanter that inputs power from the engine 5 to the mission case 6 and transmits power to the front wheels 2 and the rear wheels 3 by shifting within the mission case 6, the power is transmitted from both sides of the mission case 6. The input shaft 56 protrudes, and a belt-type continuously variable transmission mechanism 13 which is a transmission mechanism with the engine 5 is provided on one side of the input shaft 56, and a clutch mechanism 14 is provided on the other side. As a result, the left-right balance of the fuselage is improved, driving stability is improved, and the width of the fuselage can be reduced to reduce the size.

Further, a change in the specifications of the transmission mechanism, for example, a change from the belt-type continuously variable transmission mechanism 13 to a hydraulic continuously-variable transmission mechanism can be handled only by changing the transmission mechanism without changing the clutch mechanism 14. Also, the cost of parts can be reduced by sharing the clutch mechanism.

As shown in FIGS. 11 and 13, on the auxiliary transmission shaft 63, in order from the right side, there are two sliding gears 1 2 that can be fitted to the loose fitting gears 12 1 and are fitted with sub-lines. 0, fixed gear 1 1 8 and fixed gear 1 1 9 consisting of large-diameter gear 1 1 9 a 'small-diameter gear 1 1 9 b, of which sliding gear 1 1 0 has shift fork 1 0 1 is fitted. The shift fork 101 is fixed to the fork shaft 101, and the fork shaft 102 is connected to and linked to the auxiliary transmission lever 72.

Here, the sliding gear 120 is composed of a low-speed gear 120a and a high-speed gear 120b, and by operating the sub-transmission lever 72, the sliding gear 120 is moved rightward. The low-speed transmission is enabled by sliding and combining the low-speed gear 120a of the sliding gear 120 with the small-diameter gear 121b of the loose fitting gear 122. Conversely, slide the sliding gear 120 to the left, and combine the high-speed gear 120 b of the sliding gear 120 with the large-diameter gear 121 a of the loose fitting gear 121. Thus, the auxiliary transmission mechanism 70 is configured to be capable of high-speed transmission.

As shown in FIG. 5, FIG. 9, FIG. 10, and FIG. 13, a gear 122a and a drive sprocket 122b are provided at approximately the left and right centers of the main transmission shaft 61. A power split gear 122 is fixedly provided. On the left side of the power split gear 122, a double sliding gear 124 that can be coupled to the fixed gear 119 is arranged. A shift fork 103 is also fitted to the sliding gear 124, the shift fork 103 is fixed to the fork shaft 104, and the fork shaft 104 is connected to the main transmission lever 75. Linked and linked. Further In addition, a brake mechanism 78 is provided at the right end of the king transmission shaft 61, and the main transmission shaft 61 is braked by the brake mechanism 78.

Here, the sliding gear 124 is composed of a low-speed gear 124a and a high-speed gear 124b, and the main shifting lever 75 is operated to slide the sliding gear 144 to the right. By moving the high-speed gear 124b of the sliding gear 124 with the large-diameter gear 119a of the fixed gear 119, high-speed transmission is possible. Conversely, by sliding the sliding gear 1 14 to the left, and combining the low-speed gear 1 24 a of the sliding gear 1 24 with the small-diameter gear 1 19 b of the fixed gear 1 19, The main transmission mechanism 71 is configured to be able to transmit at low speed.

A chain 80 stretched by a chain tension 86 is wound between the drive sprocket 122 b on the main transmission shaft 61 and the driven sprocket 126 at the rear of the mission case 6. The gears 1 1 2a on the main transmission shaft 6 1 are connected to the left and right front wheel drive shafts 6 2 while the drive force of the main transmission shaft 61 is transmitted to the rear wheel drive shaft 69. The ring gear 1 13 of the differential device 81 to be driven is combined, and the power is split in the front and rear two directions by using the power split gear 122.

As shown in FIG. 9, a differential lock mechanism 84 is provided on the side of the differential 81. In the differential opening mechanism 84, a locking gear 123a is formed at a side end of the ring gear 113, and the gear 113a is splined on the front wheel drive shaft 62. The engaged tooth 1336a on the side of the engaged lock body 1336 is engageable. The lock body 13 36 is urged outward by a panel 85, and is urged to abut on a step portion of the front wheel drive shaft 62. In this position, the gear 1 2 3 a of the ring gear 1 2 3 and the engaging tooth 1 3 6 a on the side of the lock body 1 3 6 are in a disengaged position where they are not engaged, and the left and right front wheel drive shafts 6 are not engaged. 2 · 62 is differential.

A groove 1336b is formed outside the outer peripheral surface of the lock body 1336, and a lock operation pin 1337 pivotally supported by the transmission case 6 is engaged with the front end thereof. At the tip of the lock operation pin 1337, a contact portion 1337a having a semicircular shape on one side is formed, while a concave portion 1337b is formed on the opposite side. The arm 13 protrudes from the base of the 13 7.

In the state shown in FIG. 9, the arm 1338 is in contact with the locking operation pin 1337. 1 37 a is located in the groove 1 36 b of the lock body 1 36, and the lock body 1 36 is located at the non-engagement position with respect to the ring gear 123. When the lock operation pin 1337 is rotated by interlocking with a differential lock operation pedal (not shown), the lock body 1336 is pushed by the contact portion 1337a. The engaging tooth 13 6a and the gear 11 13a are engaged. By this engagement, the ring gear 1 2 3 is engaged with the front wheel drive shaft 62 via the buckle body 1 36, that is, a so-called “locked state of the differential device 8 1” is established. A differential opening mechanism 84 in which the front wheel drive shaft 6 2 * 62 is not differentially configured is configured.

As shown in FIGS. 11 and 13, an intermediate gear 127 is fixedly provided on the left half of the reverse shaft 67, and the intermediate gear 127 is provided with the auxiliary transmission shaft. 6 3 An input gear 1 2 7a that is always engaged with the fixed gear 1 1 8 above, a large-diameter gear 1 2 7b, a small-diameter gear 1 2 7d, and a reverse gear 1 2 7c. 127 c can be combined with the low-speed gear 124 a on the main transmission shaft 61.

Here, by operating the main transmission lever 75, the low-speed gear 1 14a of the main transmission shaft 61 is disengaged from the fixed gear 1 19 of the sub transmission shaft 63, and further slid to the left. The low-speed gear 1 24 a of the main transmission shaft 61 is combined with the reverse gear 127 c of the reverse shaft 67, and the drive transmitted from the input shaft 56 to the auxiliary transmission shaft 63 Power is transmitted as the auxiliary transmission shaft 6 3 → fixed gear 1 1 8-input gear 1 2 7 a-reverse shaft 6 7 → reverse gear 1 2 7 c → low speed gear 1 2 4 a-main transmission shaft 6 1 Is done. That is, the driving force is not transmitted to the main transmission shaft 61 as it is, but is transmitted to the main transmission shaft 61 as a reverse driving force after the rotation direction is once reversed by the reverse shaft 67.

And, as shown in Fig. 11, in the right half on the inter-stock transmission shaft 68, there is a fixed gear consisting of the first gear 13 1a-second gear 13 1 b * third gear 13 1 c. 13 1 is arranged, and a claw type clutch 82 for inter-shifting is provided in the left half. In the pawl type clutch 82, a high-speed clutch gear 125 and a low-speed clutch gear 130 having an internal tooth fixedly mounted on the inter-stock transmission shaft 68 are loosely fitted. 1 29 is always engaged with the large-diameter gear 127 b and the low-speed clutch gear 130 is always engaged with the small-diameter gear 127 d.

Furthermore, between the high-speed clutch gear 1 29 and the low-speed clutch gear 130, Left and right [; ¾ sides [tl] Sliding clutch claws 1 28 with fixed teeth are spline-fitted, and at the same time, shift forks 106 are fitted into the sliding clutch claws 18 The shift fork 106 is fitted on the fork shaft 107 so as to be movable on the fork shaft 107, and is connected to and linked to operating means (not shown).

Here, the operating means is operated to slide the sliding clutch claw 1 28 to the right, and the engaging teeth of the sliding clutch claw 1 28 are engaged with the engaging teeth of the high-speed clutch gear 1 19. Accordingly, the driving force input to the reverse shaft 67 is as follows: large-diameter gear 1 27 b → high-speed clutch gear 12 9 → sliding clutch claw 1 28—inter-shaft transmission shaft 68 → fixed gear 13 As shown in Fig. 1, high-speed transmission is possible.

Conversely, by sliding the sliding clutch pawl 1 18 to the left and engaging the engaging teeth of the sliding clutch pawl 1 28 with the engaging teeth of the low-speed clutch gear 130, the reverse shaft 6 7 The driving force input to the motor can be transmitted at a low speed like the small-diameter gear 1 2 7 d—low-speed clutch gear 13 0—sliding clutch pawl 1 18 → stock-shift shaft 6 8—fixed gear 13 1 . As shown in FIGS. 9 and 11, a cylindrical body 108 is loosely fitted to the right half of the PT〇 output shaft 64, and a spline fit is formed around the outer periphery of the cylindrical body 108. The sliding gear 13 2 thus formed and the loosely fitting gear 13 3 which is always engaged with the third gear 13 1 c are externally fitted. A shift fork 105 is fitted to the sliding gear 132, and the shift fork 105 is fitted on the fork shaft 107 so as to be able to move left and right, and is shown in the drawing. It is connected and linked to the operating means.

Further, a PTO clutch 83 for connecting / disconnecting a driving force to / from the PTO output shaft 64 is provided on the left side of the cylindrical body 108. In the clutch 83, a sliding clutch claw 13 4 having an engaging tooth fixed to the right side is spline-fitted to the output shaft 64, and the pressing panel 11 1 It is urged in the direction to engage with the engaging teeth of the clutch gear 135 fixed to the left end of the cylindrical body 108, and a fork 1 9 is fitted to the sliding clutch pawl 134. The fork 109 is connected to an operation shaft 110 supported by a mission case 6. The planting elevating lever 77, which doubles as a TO clutch lever, is connected to the operating shaft 110. Here, the sliding gear 1332 is slid to the left, and the protrusion 13a of the sliding gear 1332 from the left side surface is inserted into the receiving hole portion opened in the loose fitting gear 1333. 1 3 3 When engaged with a, The driving force transmitted to the first gear 13 1 a or the second gear 13 1 b—sliding gear 1 3 2—cylindrical body 108 until now has a large diameter third gear 13 1c → free-fitting gear 1 3 3—sliding gear 1 3 2—cylinder 108 is transmitted in this order, and the rotation speed of cylinder 108 can be changed.

Then, by operating the planting elevating lever 77 to slide the sliding clutch claw 13 4 to the left, the combined teeth of the sliding clutch claw 13 4 and the cylindrical body 108 are moved. By disengaging the clutch gear 1 3 5 from the engaging teeth, the power transmission path of the cylinder 1 08 → clutch gear 1 3 5-sliding clutch claw 1 3 4 → PTO output shaft 6 4 can be cut off. The PT〇 clutch 83 is formed.

Next, the clutch mechanism 14 will be described in detail with reference to FIG. 6, FIG. 11, and FIG.

The input shaft 56 protrudes toward the right outside from the transmission case 6, and an arm-shaped rotating body 144 opened to the right outside is detachably provided at this protruding portion. A donut-shaped friction plate 1 45 a is laminated and fixed in parallel at a predetermined interval on the outer peripheral side surface of 45.

In addition, in the gap formed on the outer peripheral portion of the friction plate 145a, the inner peripheral portion of the donut-shaped friction plate 146a provided outside is inserted alternately, and An outer peripheral portion of the friction plate 1 46 a is fixed to an inner peripheral side surface of the arm-shaped clutch 1 46, and the clutch 1 46 is detachably provided on a right end portion of the loose fitting gear 1 1 1. ing.

The rotating body 144 and the clutch 144 are detachably supported on the input shaft 56, and the input shaft 56 is rotated by a bearing 144 such as a bearing via a loose fitting gear 121. Supported as possible. The bearing 147 is arranged inside the bottom surface of the recess 6 a formed on the right side surface of the transmission case 6, that is, inside the mission case 6. As a result, even after the clutch mechanism 14 including the rotating body 144 and the clutch 144 is detached from the input shaft 56, the input shaft 56 is held by the mission case 6.

That is, a transmission shaft that serves as an input shaft 56 projects from at least one side surface of the mission case 6, and a clutch mechanism 14 is detachably provided on a protruding portion of the transmission shaft, and is a support that supports the transmission shaft. Bearings 1 4 7 are provided inside the mission case 6 Therefore, even when the clutch mechanism 14 is removed, the input shaft 56 is always installed in the fixed position, which greatly improves the handling of the clutch mechanism 14 during assembly and inspection. it can.

Further, a clutch cover 13 which forms a clutch chamber 87 together with the clutch mechanism 14 is covered by the recess 6 a provided with the clutch mechanism 14, and the clutch cover 13 9 Is detachably fixed by connecting members 154 such as bolts.

That is, in a riding rice transplanter in which a transmission shaft serving as an input shaft 56 protrudes from one side surface of the transmission case 6 and a clutch mechanism 14 is provided on a protruding portion of the transmission shaft, the clutch mechanism 14 includes a connecting member 15 Since it is covered by the clutch cover-13 which is a detachable cover member by 4 etc., the inside of the clutch mechanism 14 can be easily exposed simply by removing the clutch cover 13-9 It is excellent in maintenance at the time, and can surely prevent infiltration of muddy water and the like.

A pressure shaft 149 slidable toward the input shaft 56 is inserted coaxially with the input shaft 56 in the clutch cover 13 9. The control plate 142 is rotatably fitted to the bearing 150 by a bearing 150. The control plate 142 includes an outer plate 151 having a large diameter and an inner plate 152 having a small diameter. Among them, an outer peripheral edge of the outer plate 15 1 has an L-shaped friction portion 15 1 a formed in a plan view, and a friction plate of the self-engagement clutch 1 46 is provided on a side of the friction portion 15 1 a. It is arranged in close proximity to a donut-shaped friction plate 1 46 b fixed outside of 1 46 a.

A pressure member 144 is fixed to a part of the inner plate 152 by a connecting member 153, and the pressure member 144 is spline-fitted to the outer peripheral surface of the rotating member 144. At the same time, a clutch panel 144 is interposed between the panel receiver 144 b provided on the rotating body 144 and the inner surface of the inner plate 152.

On the other hand, a clutch operating pin 14 1 is engaged with the head of the pressing shaft 14 9 orthogonally to the pressing shaft 14 9, and the arm 1 is connected to the base of the clutch operating pin 14 1. 40 is protruding. Specifically, a concave recessed part 141 a is formed in one half of the middle of the clutch operating pin 141, and the head of the pressure shaft 144 is engaged with the concave part 141 a. It has a structure. In such a configuration, normally, as shown in FIG. 12, the head of the pressure shaft 149 is located in the concave portion 141 a of the clutch operation pin 141, and the clutch spring 1 4 3, the inner plate 15 2 is urged outward and pushed out, and the pressurizing portion 144 a of the pressurizing member 144 connected to the inner plate 152 is turned by the rotating body. The friction plate 1450a-146a is sandwiched between the backing plate sound 1450c and the pressurization plate 1450. The inner plate 152 forms a control plate 142 together with the outer plate 151. As a result, the rotating body 144 is connected to and interlocked with the clutch 144 via the friction plate 144a'146a so that the clutch is engaged, and the driving input from the engine 5 into the transmission case 6 is performed. The force is applied to the sub-transmission shaft 63 as in the input shaft 56 → rotating body 1 4 5—clutch 1 4 6 → free-fitting gear 1 1 1 → sliding gear 1 20 → sub-transmission shaft 63 Power is transmitted. At this time, since the outer plate 15 1 is also urged outward, the friction portion 15 1 a of the outer plate 15 1 does not come into contact with the friction plate 1 46 a of the clutch 14 6. The clutch 1464 can be freely rotated.

Then, when the arm 140 is rotated in conjunction with the main clutch pedal 74 and the seedling connecting lever 76 to rotate the clutch operation pin 141, the arm 14 The head of the pressure shaft 149 is pressed by the contact portion 144b corresponding to the outer peripheral portion on the opposite side, and the control plate 142 fitted to the pressure shaft 149 is also inward. Pushed into.

Then, the inner plate 15 2 is moved inward by being piled by the elastic force of the clutch panel 14 3, and the pressing portion 1 of the pressing body 14 4 connected to the inner plate 15 2. 44a is also separated from the friction plate 145a'16a. As a result, the connection between the rotating body 144 and the clutch 144 is disconnected and the clutch is disengaged, and the driving force from the engine 5 is not transmitted from the input shaft 56 to the auxiliary transmission shaft 63. Thus, a power connection / disconnection mechanism is configured.

At the same time, the outer plate 15 1 formed integrally with the inner plate 15 2 is also moved inward, and the friction portion 15 1 a of the outer plate 15 1 is connected to the friction plate 1 4 6 of the clutch 14 6. The braking mechanism is configured such that the pressure is applied to b and the rotation of the clutch 146 is braked.

The clutch mechanism 14 is composed of such a power connection / disconnection mechanism and the braking mechanism. When the clutch is disengaged, the rotation of the clutch 144 is surely stopped, and power transmission to the downstream is reliably prevented. I can do it. In addition, the auxiliary transmission shaft 63 is supported on the downstream side of the input shaft 56 by a single-shaft transmission, and the auxiliary transmission shaft 63 is supported by a bearing 148 provided in the transmission case 6. The bearing 148 is configured so as to partially overlap the outer diameter 144 a of the clutch 146 in a side view.

In other words, the bearing 144, which is an adjacent support that supports the auxiliary transmission shaft 63, which is an adjacent transmission shaft, which is one transmission downstream of the input shaft 56, which is the transmission shaft, is a clutch of the clutch mechanism 14 in a side view. 1 4 6 At least partially overlaps the outer diameter, and the adjacent support is provided inside the mission case 6, so that the distance between the input shaft 56 and the auxiliary transmission shaft 63 can be reduced, and the necessary gear The diameter is reduced, and the front end of the cushion case 6 can be reduced in size.

Next, the brake mechanism 78 and its operation configuration will be described with reference to FIGS. 6, 12, and 14 to 17. FIG.

As shown in FIGS. 6 and 14, as described above, a power split gear 122 is fixedly mounted substantially at the center on the left and right of the main transmission shaft 61, and the power split gear 122 is fixed to the power split gear 122. On the right side main transmission shaft 61, friction plates 61a are stacked and fixed in parallel at predetermined intervals. Then, friction plates 168 are alternately inserted into gaps formed on the outer peripheral portion of the friction plates 61 a, and the friction screws 168 are engaged with the side walls of the mission case 6. The friction plates 61 a-168 are positioned between the right side of the pressing plate 169 and the left side of the contact member 1667 fixed to the side wall of the mission case 6. It is located between them.

The pressing plate〗 69 is fixed to a half-shaped portion 170 a of a semicircular shape in plan view, and the half portion 170 a is formed at a lower portion of a cylindrical operating shaft 170. The shaft 170 is rotatably supported in the transmission case 6 so as to be able to rotate horizontally in the vertical direction, and protrudes from the upper portion of the mission case 6. By rotating the operation shaft 170, the pressing plate 169 presses the friction plate 61a · 168 with the contact member 1667 while pressing the friction plate 61a · 168 with the contact member 1667. The brake mechanism 78 is configured so that the rotation of the main transmission shaft 61 having 61 a is braked.

When the brake mechanism 78 configured as described above is operated, the input shaft 56 is transmitted to the auxiliary transmission shaft 63, the main transmission shaft 61, the front wheel drive shaft 62, and the rear wheel drive shaft 69. Since the main driving force is braked at the stage of the main transmission shaft 61, for example, the auxiliary transmission mechanism 70 • Even when the main transmission mechanism 71 is in the neutral position, the front wheel drive shaft 62 and the rear wheel drive shaft 69 can apply a brake without idling.

That is, in a riding rice transplanter that inputs power from the engine 5 to the transmission case 6 and shifts power in the transmission case 6 to transmit power to the front wheels 1 and the rear wheels 3, the input shaft 5 into the transmission case 5 A brake mechanism 78 is provided on the downstream side of the transmission from 6, and the brake mechanism 78 is disposed on the main transmission shaft 61, which is a power branching portion to the front wheel 2 and the rear wheel 3, so that the brake mechanism is provided. When activated, the traveling vehicle 1 can be reliably stopped without rotating the wheels 2 and 3 even when the transmission mechanisms 70 and 71 are in the neutral position.

In addition, the brake mechanism 78 is disposed on one side of the transmission case 6 on the left and right sides, and the operation shaft of the brake mechanism 78 is protruded from the upper part of the transmission case. As compared with the case, the left and right width of the mission case 6 can be reduced, and the body can be made more compact.

Further, since the brake mechanism 78 is provided near the inside of the side wall of the transmission case 6, a part of a mechanism for operating the brake mechanism 78, for example, a contact member 16 7 is supported by the transmission case 6. As a result, cost reduction and improvement in assemblability can be achieved by reducing the number of parts.

Here, the operation configuration of the brake mechanism 78 and the self-clutch mechanism 14 using the seedling connecting lever 76 and the main clutch pedal 74 will be described.

As shown in Fig. 12, Fig. 14, Fig. I6 and Fig. 17, the base of the seedling connecting lever 76 is a left-right rotating shaft 17 In addition to being fixed on 1, the support member 17 3 is pivotally supported on a fulcrum shaft 17 2 provided on the left side at the rear of the engine 5, and the lower side of the fulcrum shaft 17 2 is viewed from the side. A letter-shaped operation plate 1 7 4 is provided vertically. The front lower end portion 1774a of the operation plate 1774 is connected to the front end of the left connecting arm 1777 via a link 175, and the base of the left connecting arm 1777 is It is fixedly mounted on the left end of a pivot shaft 176 laid horizontally on the rear of 50. A right end portion of the pivot shaft 176 is rotatably supported by the side frame 41 and is connected to a base of the right connection arm 178, and a front end of the right connection arm 178 is provided. From the rear, the link 1 7 9 is extended toward the rear, and the arm 1 4 for operating the clutch operation pin 1 4 1 o ^ ^ is good.

On the other hand, the rear lower end portion 174b of the operation plate 174 is connected via a link 180 to the front end of an arm 181, which is provided to be able to rotate horizontally, and the base portion of the arm 181 Is fixed on the operation shaft 170 projecting from the upper surface of the mission case 6.

In such a configuration, as shown in FIGS. 16 and 17, when the seedling lever 76 is operated to the front and tilted rearward, the operation plate 17 4 moves around the fulcrum shaft 17 2. The arm 181 is towed forward via the link 180, and the operation shaft 170 of the brake mechanism 78 is shown in FIG. As shown in FIG. Then, the pressing plate 1669 presses the friction plate 6la * 168 against the member 1667 to apply pressure between the pressing member 1669 and the member 1667. Mechanisms 7 and 8 are activated.

At the same time, by the rotation of the operation plate 17 4, the link 1 7 5 → left connecting arm 1 7 7 → pivot shaft 1 7 6 — right connecting arm 1 7 8 — link 1 7 9 The arm 140 is rotated forward, and the clutch operation pin 141 of the clutch mechanism 14 is rotated. Then, as shown in FIG. 12, the control plate 14 2 is pushed inward by the contact portion 14 1 b via the pressurizing shaft 14 9, and the inner plate 15 2 is disengaged from the clutch panel 14. The pile is moved to the inner side by the elastic force of 3, and the pressurizing section 1 4 4 a of the pressurizing body 1 4 4 is separated from the friction plate 1 4 5 a1 4 6 a, and the rotating body 1 4 5 The connection between the clutch and the clutch 14 6 is disconnected, the clutch is disengaged, and the clutch mechanism 14 operates.

In other words, simply by operating the seedling revolving lever 76, the clutch mechanism 14 and the brake mechanism 78 are simultaneously operated, cutting off the power into the mission case and applying a brake to the entire body. This makes it possible to quickly and easily perform operations such as loading and unloading traveling vehicles on the truck bed.

Further, as shown in FIGS. 12, 15, and 17, the base of the main clutch pedal 74 is pivotally supported on fulcrum shafts 18 2 provided on the left and right sides of the side frame 42, The connecting arm 18 3 is fixedly mounted on the fulcrum shaft 18 2. The mounting portion 18 3 a, which stands upright on the upper part of the connecting arm 18 3, is connected to the left connecting arm 18 7 via a link 18 4. Connected to the front.

The base of the left connecting arm 187 is located between the left and right side frames 4 1 and 4 2. Is fixed to the left end of a pivot shaft 1805 laid on the J-axis, and the right end of the pivot shaft 1805 is connected to the base of the right connecting arm 1888. A link 186 extends forward from a leading end of the connecting arm 188 and is connected to an arm 140 for operating the clutch operating pin 141.

In such a configuration, as shown in FIGS. 15 and 17, when the main clutch pedal 74 is depressed, the connecting portion 18 3 a of the connecting arm 18 3 is connected to the fulcrum shaft 18 2. Rotating counterclockwise around the center, link 1 8 4 → left connecting arm 1 8 7 → pivot axis 1 8 5 — right connecting arm 1 8 8 — link 1 8 6 By pulling 140 backward, the clutch operation pin 141 of the clutch mechanism 14 is rotated. Then, the clutch mechanism 14 is operated in the same manner as in the case where the above-mentioned seedling renoir 76 is operated.

That is, the operation of the clutch mechanism 14 is enabled by both the seedling connecting lever 76 and the main clutch pedal 74, so that they can be operated while riding or disengaging the aircraft, and the manual operation can be performed. The lever, which is a tool, and the pedal, which is a foot operation tool, make it easy to identify and operate both, so that there is no erroneous operation.

Next, the lubricating structure in the mission case 6 capable of transmitting power as described above will be described with reference to FIGS. 8, 12, 13, and 18 to 20. FIG.

As shown in FIG. 8, FIG. 13 and FIG. 18, a return oil pipe 155 from a control valve (not shown) is provided on the right side of the transmission case 6 at substantially the center in the front-rear direction. A suction pipe 156 for sucking the lubricating oil in the case 6 is provided in the lower part of the transmission chamber 60 in the front of the mission case 6, and is provided diagonally behind the main transmission shaft 61 of the transmission chamber 60. It is connected to the side of the mounted cylindrical suction filter 157.

Thereby, a tank capable of storing lubricating oil is formed in a region from the lower part of the mission case 6 to the variable speed chamber 60 in the middle part of the upper part of the mission case 6.

Furthermore, since the return oil pipe 155 and the suction pipe 156 are arranged so as to face each other with the chain 80 interposed therebetween, the high-temperature hot water returned from the return oil pipe 155 to the inside of the mission case 6 can be used. The lubricating oil is sent rearward and downward by the driving of the chain 80 and agitated, and exerts a sufficient cooling effect while convection in the transmission case 6. Therefore, high temperature The oil temperature in the transmission case 6 can be made almost uniform without the lubricating oil immediately moving to the front suction tube 156 side.

As shown in FIGS. 12 and 18, a through hole is formed in a wall surface 6b on the lower side surface of the recess 6a of the mission case 6 in which the clutch mechanism 14 is housed. A lubricating oil in the transmission case 6 flows into the clutch chamber 87 or flows out of the clutch chamber 87 through the oil passage 16 3. That is, the power from the engine 5 is input to the mission case 6, and the speed is shifted within the mission case 6 to transmit power to the front wheels 2 and the rear wheels 3. A transmission shaft serving as a shaft 56 protrudes, a clutch mechanism 14 is provided at a protruding portion of the transmission shaft, and an oil passage 1 that communicates a clutch chamber 87 accommodating the clutch mechanism 14 with the mission case 6 is provided. 6 3 is provided on the wall 6 b of the transmission case 6 in which the clutch mechanism 14 is provided.As a result, compared to the case where the clutch mechanism 14 is provided inside the Not only the tenability is improved, but also the clutch chamber 87 serves as a lubricating oil storage tank, and from the transmission case 6 which can be said to be a larger storage tank, a sufficient amount via the oil passage 16 3 Jun Because the lubricating oil is circulated, even when working in a field with severe ups and downs, the level of the oil level is remarkable, the friction plate 1 4 5 a '1 4 6 a, the friction section 1 4 6 b It is possible to reliably prevent seizure in the frictional portion such as.

Here, as shown in FIG. 19, the mission case 6 during operation or running in a normal flat field is in a posture 1 65 (hereinafter referred to as a “stable traveling posture”). The oil passage # 63 is arranged in the third quadrant 160.

In this case, the lubricating oil inside the mission case 6 and the clutch chamber 87 has the same oil level 1558a and 159a, so that it can circulate freely through the oil passage 163. Therefore, in this stable running posture 165, a sufficient amount of lubricating oil can be supplied to the friction portion in the clutch chamber 87.

Then, as shown in Fig. 20, when the front of the fuselage rises greatly and the mission case 6 is in the attitude 16 6 (hereinafter referred to as “inclination attitude”), the mission case 6 Lubricating oil level in the clutch chamber 8 7 than in the lubricating oil level 1 5 8 b The oil passage 163 is located above the oil surface 159b, as well as the surface 1 by. Therefore, as described above, the clutch chamber 87 functions as a lubricating oil storage tank, and a predetermined amount of lubricating oil is secured in the clutch chamber 87.

When the oil passage is located in the first quadrant and the second quadrant, the oil level is always constant in both the stable running posture and the inclined posture. a · 15 9 b Since it is located above b, it is impossible to supply lubricating oil from inside the transmission case 6 into the clutch chamber 87, and if the oil passage is located in the fourth quadrant, 16 4, the lubricating oil in the clutch chamber 87 flows down into the mission case 6 through the oil passage 16 4 in the inclined posture 16 6, and the clutch chamber 87 serves as a lubricating oil storage tank. As a result, a predetermined amount of lubricating oil cannot be secured in the clutch chamber 87.

That is, since the oil passage is disposed in the third quadrant of the wall surface 6b, which is the wall surface as viewed from the left in the traveling direction of the aircraft, in the mission case 6 in the stable traveling posture 1 65, The oil passage 16 3 is located above the oil level 1 59 b and the clutch chamber 87 functions as a lubricating oil storage tank even if the A predetermined amount of lubricating oil can be ensured in the clutch chamber 87, and seizure in the friction portion can be reliably prevented. Industrial applicability

INDUSTRIAL APPLICABILITY As described above, the present invention can be applied to a mounting configuration of a clutch mechanism of a transmission case and a lubrication configuration in a riding rice transplanter.

That is, according to the present invention, in a riding rice transplanter that inputs power from an engine to a transmission case and transmits power to front wheels and rear wheels by shifting within the transmission case, the input shaft is provided from one side of the transmission case. Since the transmission shaft is protruded and the clutch mechanism is provided on the protruding portion of the transmission shaft, the clutch mechanism can be easily accessed from the outside. The ease of assembly and the ease of maintenance during inspection are improved.

Also, since the clutch mechanism is covered by a detachable cover member, the inside of the clutch mechanism can be easily exposed simply by removing the force member, and is excellent in maintenance at the time of inspection, and Intrusion of muddy water and the like can be reliably prevented. Also, the present invention provides a riding rice transplanter that inputs power from an engine to a transmission case and transmits power to a front wheel and a rear wheel by shifting within the transmission case, wherein an input shaft is provided from both sides of the transmission case. The input shaft is provided with a transmission mechanism on one side of the input shaft and a clutch mechanism on the other side, and a clutch mechanism is provided on the other side, so that the left-right balance of the body is improved and running stability is improved. The body can be made narrower to make it smaller. Furthermore, the specification change of the transmission mechanism can be dealt with only by changing the transmission mechanism without changing the clutch mechanism, and the cost of parts can be reduced by sharing the clutch mechanism.

Further, a transmission shaft serving as an input shaft protrudes from at least one side surface of the mission case, a clutch mechanism is detachably provided on a protruding portion of the transmission shaft, and a support for supporting the transmission shaft is provided inside the mission case. Since the transmission shaft is always installed at the fixed position even when the clutch mechanism is removed, the handling of the clutch mechanism during assembly and inspection can be greatly improved.

Further, the adjacent support that supports the adjacent transmission shaft on the one-axis transmission downstream side from the transmission shaft at least partially overlaps the outer diameter of the clutch of the clutch mechanism in a side view, and the adjacent support is provided inside the mission case. With this arrangement, the distance between the transmission shaft and the adjacent transmission shaft can be reduced, the required gear diameter can be reduced, and the front end of the mission case can be reduced in size.

Further, the present invention provides a riding rice transplanter that inputs power from an engine to a transmission case and transmits power to front wheels and rear wheels by shifting within the transmission case, and the input shaft is formed from one side of the transmission case. The transmission shaft is protruded, a clutch mechanism is provided on a protruding portion of the transmission shaft, and an oil passage communicating the clutch chamber accommodating the clutch mechanism and the transmission case is provided on a wall of the mission case where the clutch mechanism is disposed. As a result, compared to the case where the clutch mechanism is provided inside the transmission case, not only the ease of assembly during manufacturing and the ease of maintenance during inspection are improved, but also the clutch chamber functions as a lubricating oil storage tank. Since a sufficient amount of lubricating oil is circulated through the oil passage from the large case, which can be said to be a large storage tank, Even severe cases such as in the oil level changes working field is remarkable, friction plate, it is possible to reliably prevent the seizure of the friction part, such as a friction portion. Further, since the oil passage is disposed in the third quadrant of the wall when viewed from the left side in the traveling direction of the fuselage in a mission case in a stable running posture, for example, the front part of the fuselage is large and the mission case is large. Even when inclined, the oil passage is located above the oil level in the clutch chamber, and the clutch chamber functions as a storage tank for lubricating oil, so that a predetermined amount of lubricating oil can be secured in the clutch chamber. Seizure in the friction portion can be reliably prevented.

Claims

The scope of the claims

1. In a riding rice transplanter that inputs power from the engine to the transmission case and transmits power to the front and rear wheels by shifting within the transmission case, the transmission shaft that serves as the input shaft protrudes from one side of the transmission case. A riding rice transplanter, wherein a clutch mechanism is provided on a protruding portion of the transmission shaft.

2. The riding rice transplanter according to claim 1, wherein the clutch mechanism is covered by a detachable cover member.

3. In a riding rice transplanter that inputs power from an engine to a transmission case and transmits power to a front wheel and a rear wheel by shifting within the transmission case, an input shaft protrudes from both side surfaces of the mission gas, and A riding rice transplanter, wherein a transmission mechanism between the engine and the engine is provided on one side of the shaft, and a clutch mechanism is provided on the other side.

4. A transmission shaft serving as an input shaft protrudes from at least one side surface of the mission case, a clutch mechanism is detachably provided on a protruding portion of the transmission shaft, and a support for supporting the transmission shaft is provided inside the mission case. 4. The riding rice transplanter according to claim 1, 2 or 3, wherein the rice transplanter is provided in a rice planter.

5. The adjacent support that supports the adjacent transmission shaft on the one-axis transmission downstream side from the transmission shaft at least partially overlaps with the clutch outer diameter of the clutch mechanism in a side view, and the adjacent support is located inside the mission case. The rice transplanter according to claim 1, 2, 3, or 4, wherein the rice transplanter is provided.

6. In a passenger rice transplanter that inputs the power from the engine to the transmission case and transmits power to the front and rear wheels by shifting the speed in the transmission case, the transmission shaft serving as the input shaft protrudes from one side of the transmission case. In addition, a clutch mechanism is provided on the protruding portion of the transmission shaft, and an oil passage communicating the clutch chamber accommodating the clutch mechanism with the transmission case is provided on a wall surface of the transmission case where the clutch mechanism is provided. Riding rice transplanter.

7. The riding rice transplanter according to claim 6, wherein the oil passage is disposed in a third quadrant of the wall as viewed in a left side view in a traveling direction of the vehicle in a transmission case in a stable running posture. .