JP2018134948A5 - - Google Patents

Description

Tractor

  The present invention relates to a work vehicle such as an agricultural tractor, and more particularly to a support structure of a battery.

  A configuration in which brackets supporting the fuel tank are mounted on one side to the left and right of a transmission case as a vehicle body of an agricultural tractor, and a bracket supporting the battery is mounted on the other side (Patent Document 1) A battery storage portion is formed, a cover is provided openably and closably in the battery storage portion, and a battery mounting table is rotatably provided in the battery storage portion across the storage position and the protruding position (Patent Document 2) .

JP-A-59-223577 Japanese Utility Model Application Publication No. 5-91998

  By the way, the supporting structure of the battery and the fuel tank of Patent Document 1 arranges the heavy structural members below the vehicle body, so the vehicle body center of gravity is lowered and the stability is improved. However, the configuration of the battery support is simple because the battery is directly supported by the brackets connected to the left and right of the transmission case, but the effects of dust and dirt of the battery on the brackets are not provided. On the other hand, in the configuration of Patent Document 2, in addition to providing a cover body in the battery storage portion to prevent dust and dirt, the battery mounting table is configured to be freely rotatable to facilitate battery replacement and inspection. However, the battery mounting table is complicated because it has a pivoting configuration, and it is further complicated in combination with the pivoting configuration of the cover body on its side, and there are problems in manufacturing and assembly.

  SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and facilitates manufacture and assembly of a bracket member for supporting a battery while achieving dust and dirt protection.

  The present invention takes the following technical measures in order to solve the above problems.

The invention according to claim 1 comprises a base member 96, a battery bracket 97 detachably fixed to the base member 96, and an outer cover 100 covering a battery 95 detachably fixed to the battery bracket 97.
The outer cover 100 is formed with an upper surface cover 100a covering at least the outer side of the body of the upper surface of the battery 95, an outer side cover 100b covering the outer side, and a front cover or rear cover 100c covering the front or rear. And a tractor .

  In the invention according to claim 2, in the invention according to claim 1, the battery bracket 97 together with the outer surface of the battery 95 fixed to the battery bracket 97 and the top cover portion 100a of the exterior cover 100 It has a main cover 97a covering the upper surface of the battery 95, and a sub cover 97b covering the rear or front of the battery 95 on the side opposite to the front cover or rear cover 100c of the outer cover 100.

  In the invention according to claim 3, in the invention according to claim 1 or 2, between the fixed base member 96 and the battery bracket 97, locking convex portions 97e and 97e and a locking portion A battery bracket 97 is provided on the base member 96 such that the battery bracket 97 can be locked.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the battery bracket 97 is provided with a projection plate 97c for positioning the battery 95 and a fixing band 98, 98 for the battery 95. The hooks 99, 99 are provided.

  In the invention described in claim 5, in the invention described in any one of claims 1 to 4, the battery 95 is disposed on the front side of the fuel tank 80R attached to the side of the airframe.

  According to a sixth aspect of the present invention, in the fifth aspect, the fuel tanks 80L and 80R are disposed on both the left and right sides of the airframe, and the fuel tanks 80L and 80R are connected by a connecting pipe 87 so as to allow fuel flow. The connecting pipe portion 87c on the way is held by the base member 96.

  According to the present invention, the support structure for mounting the battery 95 is easy to manufacture because it is divided into the base member 96 directly fixed to the airframe and the battery bracket 97. In addition, when assembling to the airframe, the base member 96 is first fixed, but the assembly is easy because the weight reduction is achieved by being separated from the battery bracket 97. In particular, the battery bracket 87 is configured by the engagement of the locking projections 97e, 97e and the locking portions 96f, 96f, so that the battery bracket 97 mounted on the base member 86 can be slide-assembled, and the assembly operation is easy.

  When the battery 95 is attached to the battery bracket 97, the exterior cover 100 is removed, and the battery 95 is placed on the front side (or the rear side) of the battery bracket 97 with the exterior cover 100 removed. The battery 95 inserted and positioned from can be fixed by the fixing bands 98, 98. Then, the harness is connected and the exterior cover 100 is attached. When the battery 95 is removed, the process can be performed in the reverse process. Therefore, at the time of inspection and replacement of the battery 95, the main body of the battery 95 is taken out and attached from the front side of the vehicle by attaching and detaching only the exterior cover 100. Since the outer side can be opened, and the hand can be extended from the side to use the fastening bolt of the outer cover 100, the main body of the battery 95 and the harness-related removal and mounting tools, work efficiency is not reduced.

  When the battery 95 is disposed on the front side of the fuel tank 80R, the front dead space of the fuel tank 80R can be effectively used. When the fuel tanks 80L and 80R are disposed on the left and right of the machine body and both tanks are connected by the connecting pipe 87, the connecting pipe portion 87c in the middle can be supported by the base member 96 to simplify parts.

It is a side view of a tractor. It is a diagram which shows the transmission mechanism of the transmission of a tractor. (A) is a sectional view showing a transmission system transmission mechanism of a tractor in particular, and (B) is a sectional view showing a PTO transmission mechanism of a transmission system of the tractor in particular. FIG. 6 is a partial side view of the transmission case of the tractor viewed from the left side in the vehicle width direction. FIG. 6 is a partial side view of the front transmission case of the tractor viewed from the right side in the vehicle width direction. FIG. 6 is a partial side view of the front transmission case of the tractor as viewed from the left side in the vehicle width direction. (A), (B) and (C) are a side view, a rear view, and a top view of a spacer case of a tractor. FIG. 3 is a partial side view of the transmission case and fuel tank of the tractor viewed from the left side in the vehicle width direction. FIG. 2 is a partial plan view of the transmission case, fuel tank and battery of the tractor as viewed from above. It is the partial bottom view which looked at the transmission case of a tractor, a fuel tank, and the battery from the downward direction. It is the partial front view which abbreviate | omitted the battery and looked at the transmission case and fuel tank of the tractor from the front. FIG. 2 is a partial perspective view of a transmission case and a fuel tank of a tractor viewed obliquely from the left front. It is a sectional view of a fuel tank. FIG. 5 is an exploded perspective view of a battery support arrangement. FIG. 5 is an exploded perspective view of a battery support arrangement. They are the surface side perspective view (A) and back surface side perspective view (B) of the base member of a battery support structure. They are a side view (A), a front view (B), and a cutting end elevation (C) of a battery bracket part of battery support composition. It is a perspective view of a fuel tank which omitted a battery.

  Hereinafter, embodiments according to the present invention will be described in detail based on the drawings.

  The tractor 1 as a working vehicle of the present embodiment shown in FIGS. 1 to 3 is a working vehicle such as an agricultural tractor that performs work in a farm or the like while traveling by power generated by a power source. The tractor 1 includes a front wheel 2, a rear wheel 3, an engine 4 as a power source, and a transmission 5. Among them, the front wheel 2 is mainly provided as a steering wheel, that is, a steered wheel. The rear wheel 3 is mainly provided as a drive wheel, that is, a drive wheel. The rotational power generated by the engine 4 mounted in the bonnet 6 at the front of the vehicle body can be appropriately decelerated by the transmission 5 and transmitted to the rear wheel 3. Driving power is generated by rotational power. The transmission 5 can also transmit rotational power generated by the engine 4 to the front wheels 2 as needed. In this case, the four front wheels 2 and rear wheels 3 serve as driving wheels. Generate driving force. That is, the transmission 5 can switch between two-wheel drive and four-wheel drive, decelerates the rotational power of the engine 4, and can transmit the decelerated rotational power to the front wheel 2 and the rear wheel 3. In addition, the tractor 1 is provided at the rear of the machine body with a connecting device 7 to which a working machine such as a rotary (not shown) can be attached.

  In the tractor 1, the steering handle 11 is erected from the dashboard 10 on the front side of the cockpit 8 and various operation pedals such as a clutch pedal, a brake pedal, an accelerator pedal, etc. The various control levers of are arranged.

  FIG. 2 is a diagram showing the transmission mechanism 13 in the transmission case 12 of the transmission 5. As shown in FIG. The transmission 5 includes a transmission case 12 (see FIGS. 3 and 4), and a transmission mechanism 13 disposed in the transmission case 12 for transmitting rotational power from the engine 4 to the rear wheel 3 and the like. The transmission mechanism 13 transmits the rotational power from the engine 4 to the front wheels 2, the rear wheels 3, and the work machine mounted on the machine body, and drives these by the rotational power from the engine 4.

  Specifically, the transmission mechanism 13 includes an input shaft 14, a forward / reverse switching mechanism 15, a Hi-Lo transmission mechanism 16 as a high / low speed transmission mechanism, a main transmission mechanism 17, a secondary transmission mechanism 18, a 2WD / 4WD switching mechanism 19, a PTO. (Power take-off) A drive mechanism 20 etc. are comprised. The transmission mechanism 13 transmits the rotational power generated by the engine 4 to the rear wheel 3 through the input shaft 14, the forward / reverse switching mechanism 15, the Hi-Lo transmission mechanism 16, the main transmission mechanism 17, and the auxiliary transmission mechanism 18 in this order. be able to. Further, the transmission mechanism 13 includes rotational force generated by the engine 4 as the input shaft 14, the forward / backward switching mechanism 15, the Hi-Lo transmission mechanism 16, the main transmission mechanism 17, the auxiliary transmission mechanism 18, and the 2WD / 4WD switching mechanism 19. It can transmit to the front wheel 2 via in order. Furthermore, the transmission mechanism 13 can transmit the rotational power generated by the engine 4 to the working machine via the input shaft 14 and the PTO drive mechanism 20 in order.

  The input shaft 14 is coupled to the output shaft of the engine 4 and receives rotational power from the engine 4.

  The forward / reverse switching mechanism 15 is capable of switching the rotational power transmitted from the engine 4 to forward rotation or reverse rotation. The forward / reverse switching mechanism 15 is configured to include a forward gear stage 15a, a reverse gear stage 15b, a reverse counter gear 15c, a forward hydraulic multiplate clutch C1 in the form of a hydraulic multiplate clutch, and a reverse hydraulic multiplate clutch C2. The forward and reverse hydraulic multi-plate clutches C1 and C2 can switch the power transmission path in the forward / backward switching mechanism 15 by switching the engagement / release state. The forward / reverse switching mechanism 15 changes the transmission path and transmits the rotational power transmitted to the input shaft 14 to the counter shaft 21 according to the engaged / released state of the forward / reverse hydraulic multi-plate clutches C1 and C2.

  When the forward hydraulic multi-plate clutch C1 is in the engaged state and the reverse hydraulic multi-plate clutch C2 is in the release state, the forward / backward switching mechanism 15 advances the rotational power transmitted to the input shaft 14 to the forward gear stage 15a, forward It is transmitted to the counter shaft 21 by rotation in the forward direction through the hydraulic multi-plate clutch C1. When the forward hydraulic multi-plate clutch C1 is in the released state and the reverse hydraulic multi-plate clutch C2 is in the engaged state, the forward / backward switching mechanism 15 transmits the rotational power transmitted to the input shaft 14 to the reverse gear stage 15b, reverse gear 15c, it is transmitted to the counter shaft 21 by rotation in the reverse direction through the reverse hydraulic multi-plate clutch C2. Thereby, the forward / reverse switching mechanism 15 can switch between forward and reverse travel of the tractor 1.

  The forward / reverse switching mechanism 15 also functions as a main clutch, and is brought into the neutral state by releasing both the forward and reverse hydraulic multi-plate clutches C1 and C2, thereby transmitting power to the front wheels 2 and rear wheels 3 side. Can block. The forward / reverse switching mechanism 15 can switch between forward / reverse and neutral by hydraulic control, for example, by operating a forward / backward switching lever outside the figure by a worker. Further, by depressing the clutch pedal, both the forward and reverse hydraulic multi-plate clutches C1 and C2 can be released.

  The Hi-Lo transmission mechanism 16 can change the rotational power transmitted from the engine 4 at a high speed stage or a low speed stage. The Hi-Lo transmission mechanism 16 includes a Hi (high speed) gear 16a, a Lo (low speed) gear 16b, a hydraulic multi-plate clutch (Hi (high speed) side clutch) C3, a hydraulic multi-plate clutch (Lo (low speed) Clutch) is configured including C4. The hydraulic multi-plate clutches C3 and C4 can switch the power transmission path in the Hi-Lo transmission mechanism 16 by switching the engagement / release state. The Hi-Lo transmission mechanism 16 changes the transmission path and transmits the rotational power transmitted to the counter shaft 21 to the transmission shaft 22 according to the engaged / released states of the hydraulic multi-plate clutches C3 and C4. When the hydraulic multi-plate clutch C3 is in the engaged state and the hydraulic multi-plate clutch C4 is in the release state, the Hi-Lo transmission mechanism 16 is configured to transmit the rotational power transmitted to the counter shaft 21 to the hydraulic multi-plate clutch C3, Hi side. The gear is shifted via the gear 16a and transmitted to the transmission shaft 22.

  When the hydraulic multi-plate clutch C3 is in the released state and the hydraulic multi-plate clutch C4 is in the engaged state, the Hi-Lo transmission mechanism 16 transmits the rotational power transmitted to the counter shaft 21 to the hydraulic multi-plate clutch C4, Lo side. The gear is shifted via the gear 16b and transmitted to the transmission shaft 22. As a result, the Hi-Lo transmission mechanism 16 can transmit rotational power from the engine 4 to the subsequent stage by changing the transmission ratio of the Hi side gear 16a or the transmission ratio of the Lo (low speed) side gear 16b. it can. The Hi-Lo transmission mechanism 16 switches the Hi (high speed) side and the Lo (low speed) side by hydraulic control, for example, when a Hi-Lo changeover switch (high / low gear shift operation switch) outside the figure is turned on / off by a worker. It can be shifted in either of two stages, high speed and low speed. Further, the Hi-Lo transmission mechanism 16 can be changed during traveling of the tractor 1 by the above-described configuration.

The main transmission mechanism 17 can shift the rotational power transmitted from the engine 4 at any of a plurality of shift speeds. The main transmission mechanism 17 is a synchromesh transmission mechanism, and in this case, it can change the rotational power transmitted from the engine 4 via the forward / reverse switching mechanism 15 and the Hi-Lo transmission mechanism 16. The main transmission mechanism 17 has a plurality of gear stages, as first gear stage 17a, second gear stage 17b, third gear stage 17c, fourth gear stage 17d, fifth gear stage 17e, sixth gear It comprises the stage 17f. The main transmission mechanism 17 transmits the rotational power transmitted to the transmission shaft 22 according to the coupling state of the first speed gear stage 17a to the sixth speed gear stage 17f with the transmission shaft 22, to the first speed gear stage 17a to the first speed stage 17a. The gear is shifted and transmitted to the transmission shaft 23 through any one of the sixth gear stages 17 f. As a result, the main transmission mechanism 17 can transmit rotational power from the engine 4 to the subsequent stage by shifting the transmission power at any one of the first speed gear 17a to the sixth speed 17f.
For example, the main transmission mechanism 17 can select and switch one of the plurality of shift stages by operating a main shift operation lever (not shown) by an operator, and the first speed gear stage 17a It is possible to shift at any one of six speeds of the sixth speed gear stage 17f. Further, the main transmission mechanism 17 can be changed during traveling of the tractor 1 by the above configuration.

  The auxiliary transmission mechanism 18 can shift the rotational power transmitted from the engine 4 via the forward / reverse switching mechanism 15, the Hi-Lo transmission mechanism 16, and the main transmission mechanism 17 in order. The auxiliary transmission mechanism 18 is configured to include the first auxiliary transmission 24, the second auxiliary transmission 25, and the like, and the rotational power transmitted to the transmission shaft 23 is converted to the first auxiliary transmission 24 and the second auxiliary transmission 25. The transmission is shifted to the transmission shaft 26 via the transmission shaft 26 and the like. The first auxiliary transmission 24 can transmit rotational power transmitted from the engine 4 and shifted by the main transmission mechanism 17 or the like at a high speed stage or a low speed stage to the rear wheel 3 that is a driving wheel. The second auxiliary transmission 25 is a rear wheel 3 which is a drive wheel by shifting rotational power transmitted from the engine 4 and shifted by the main transmission mechanism 17 etc. at an ultra-low speed that is lower than the first auxiliary transmission 24. It can be transmitted to the side. The second auxiliary transmission 25 is omitted when simplification of the specification or the like is required.

  The first auxiliary transmission 24 of the auxiliary transmission mechanism 18 includes a first gear 24a, a second gear 24b, a third gear 24c, a fourth gear 24d, and a shifter 24e. The first gear 24 a is coupled to the transmission shaft 23 so as to be integrally rotatable, and rotational power from the transmission shaft 23 is transmitted (inputted). The second gear 24b meshes with the first gear 24a. The third gear 24c is integrally rotatably coupled to the second gear 24b. The fourth gear 24d meshes with the third gear 24c. The shifter 24 e switches the coupling state between the first gear 24 a and the fourth gear 24 d and the transmission shaft 26. That is, the clutch claw 26a integrally formed with the transmission shaft 26, the clutch claw 24ac integrated with the first gear 24a, and the clutch claw 24dc integrated with the fourth gear 24d have the same diameter and the same number of teeth and are adjacent to each other. The power is transmitted from the first gear 2a to the transmission shaft 26 when the clutch claw 26a and the clutch claw 24ac are simultaneously engaged, and when the clutch claw 26a and the clutch claw 24dc are simultaneously engaged, the fourth gear 24d is disposed. Power is transmitted to the transmission shaft 26. The clutch claws are arranged so as to be shiftable to a position where the shifter 24e does not engage with either the clutch claw 24ac or the clutch claw 24dc.

  The shifter 24e has a Hi (high speed) side position that integrally couples the first gear 24a and the transmission shaft 26, and a Lo (low speed) position where the fourth gear 24d and the transmission shaft 26 are integrally rotatably coupled. None of the first gear 24 a and the fourth gear 24 d is coupled to the transmission shaft 26 and is movable to a neutral position (neutral position) where it is released. The first auxiliary transmission 24 transmits the rotational power transmitted to the transmission shaft 23 to the transmission shaft 26 by switching the transmission path according to the position of the shifter 24 e.

  The second auxiliary transmission 25 of the auxiliary transmission mechanism 18 includes a first gear 25a, a second gear 25b, a third gear 25c, a fourth gear 25d, and a shifter 25e. The first gear 25 a is integrally rotatably coupled to the fourth gear 24 d of the first auxiliary transmission 24. The second gear 25b meshes with the first gear 25a. The third gear 25c is integrally rotatably coupled to the second gear 25b. The fourth gear 25d meshes with the third gear 25c. The shifter 25 e switches the coupling state of the fourth gear 25 d and the transmission shaft 26. That is, the clutch claw 26b integrally formed with the transmission shaft 26 and the clutch claw 25dc integrated with the fourth gear 25d are formed to have the same diameter and the same number of teeth and are arranged adjacent to each other, and the shifter 25e is arranged with the clutch claw 26b When the clutch claws 25 dc are simultaneously engaged, power is transmitted from the fourth gear 25 d to the transmission shaft 26.

  Shifter 25e has an ultra-Lo (ultra-low speed) side position for connecting fourth gear 25d and transmission shaft 26 integrally rotatably, and a neutral position where the fourth gear 25d and transmission shaft 26 are not connected and released. Position). In this case, the rotation of the transmission shaft 26 is controlled by the position of the shifter 24 e of the first auxiliary transmission 24. The second auxiliary transmission 25 transmits the rotational power transmitted to the transmission shaft 23 to the transmission shaft 26 by switching the transmission path according to the position of the shifter 25 e. When the first auxiliary transmission 24 is in the neutral state and the shifter 25 e is at the super Lo side position, the second auxiliary transmission 25 transmits the rotational power transmitted to the transmission shaft 23 to the first auxiliary transmission 24. From 1 gear 24a, 2nd gear 24b, 3rd gear 24c, 4th gear 24d, 1st gear 25a of 2nd auxiliary transmission 25, 2nd gear 25b, 3rd gear 25c, 4th gear 25d, shifter 25e The speed is sequentially reduced via the transmission shaft 26 and transmitted to the transmission shaft 26. As a result, the second auxiliary transmission 25 transmits the rotational power from the engine 4 to the second gear 24b, the third gear 24c, the fourth gear 24d, the first gear 25a, the second gear 25b, the third gear 25c, and the second auxiliary transmission 25. It is possible to change the transmission ratio at the super Lo (super low speed) side via the 4 gears 25d and transmit it to the subsequent stage. Further, when the shifter 25e is in the neutral position, the second auxiliary transmission 25 is in a state in which the fourth gear 25d idles with respect to the transmission shaft 26, that is, in a neutral state.

  Therefore, by combining the first auxiliary transmission 24 and the second auxiliary transmission 25, the auxiliary transmission mechanism 18 combines the rotational power transmitted to the transmission shaft 23 with one of the three stages of high speed, low speed and ultra low speed. The transmission can be transmitted to the transmission shaft 26 by shifting in any way.

  The transmission mechanism 13 of the transmission 5 transmits the rotational power transmitted to the transmission shaft 26 to the rear wheel 3 via the rear wheel differential 27, the rear axle 28, the planetary gear reduction mechanism 29 for reduction, and the like. As a result, in the tractor 1, the rear wheel 3 is rotationally driven as a driving wheel by the rotational power from the engine 4.

  The 2WD / 4WD switching mechanism 19 includes the hydraulic multiple disc clutches C6 and C7, and also functions as a front wheel speed increasing mechanism. The 2WD / 4WD switching mechanism 19 includes a transmission shaft 19a, Hi (high speed) side gear 19b, Lo (low speed) side gear 19c, hydraulic multi-plate clutch (Lo (low speed) side clutch) C6, hydraulic multi-plate clutch (Hi The (high-speed) side clutch C7 and the transmission shaft 19d are included. The hydraulic multi-plate clutches C6 and C7 can switch the power transmission path in the 2WD / 4WD switching mechanism 19 by switching the engaged / released state. The 2WD / 4WD switching mechanism 19 changes the transmission path to transmit the rotational power transmitted to the transmission shaft 19a to the transmission shaft 19d in accordance with the engaged / released states of the hydraulic multi-plate clutches C6 and C7. When 2WD / 4WD switching mechanism 19 is in the engaged state of hydraulic multi-disc clutch C6 and in the released state of hydraulic multi-disc clutch C7, the rotational power transmitted to transmission shaft 19a is represented by Lo side gear 19c, hydraulic poly The speed is changed via the plate clutch C6 and transmitted to the transmission shaft 19d.

  The 2WD / 4WD switching mechanism 19 switches whether to transmit the rotational power transmitted to the transmission shaft 26 to the front wheel 2 side. The 2WD / 4WD switching mechanism 19 includes a transmission shaft 19a, a Hi gear stage 19b, a Lo gear stage 19c, and a transmission shaft 19d. In the transmission shaft 19a, rotational power from the transmission shaft 26 is transmitted (input) via the gear 30, the gear 31, the transmission shaft 32, the coupling 33, and the like. The transmission shaft 19a is inserted in the first gear 19b, and the first gear 19b is assembled so as to be rotatable relative to the transmission shaft 19a.

  The transmission mechanism 13 of the transmission 5 includes a front wheel differential input shaft 19e extending in the longitudinal direction, a front wheel differential 34, a front axle 35, a longitudinal axis 36, a planetary gear reduction mechanism 37, etc. To the front wheel 2 via As a result, in the tractor 1, the front wheels 2 and the rear wheels 3 can be rotationally driven as drive wheels by the rotational power from the engine 4, and can travel by four-wheel drive. In the 2WD / 4WD switching mechanism 19, power transmission to the transmission shaft 19d side of the rotational power transmitted to the transmission shaft 19a is cut off when both hydraulic multi-plate clutches C6 and C7 are released. As a result, the tractor 1 can travel by two-wheel drive.

  The PTO drive mechanism 20 drives the working machine by the power from the engine 4 by changing the rotational power transmitted from the engine 4 and outputting it from the PTO shaft 40 (see FIG. 2) at the rear of the machine to the working machine. It is. The PTO drive mechanism 20 includes a PTO clutch mechanism 38, a PTO transmission mechanism 39, a PTO shaft 40, and the like.

  The PTO clutch mechanism 38 switches between transmission and shutoff of power to the PTO shaft 40 side. The PTO clutch mechanism 38 includes a gear 38a, a hydraulic multi-plate clutch C5, and a transmission shaft 38b. The gear 38a is in mesh with a gear 41 coupled integrally with the input shaft 14 so as to be rotatable. The hydraulic multi-plate clutch C5 switches the transmission state of power between the gear 38a and the transmission shaft 38b by switching the engagement / release state. The PTO clutch mechanism 38 is in a PTO drive state in which power is transmitted to the PTO shaft 40 side when the hydraulic multi-plate clutch C5 is engaged, and the rotational power transmitted from the input shaft 14 to the gear 38a via the gear 41. Is transmitted to the transmission shaft 38b via the hydraulic multi-plate clutch C5. The PTO clutch mechanism 38 is in the PTO non-driven state (neutral state) where transmission of power to the PTO shaft 40 side is interrupted by the hydraulic multi-plate clutch C5 being released, and the rotational power transmitted to the gear 38a The transmission to the transmission shaft 38b side is cut off.

  The tractor 1 is provided with a gear pump 70 via a gear 70a meshing with the gear 38a, a gear 70b meshing with the gear 70a, and the like. The gear pump 70 applies oil pressure to a hydraulic system such as the transmission mechanism 13 and the like.

  The PTO transmission mechanism 39 performs gear change when transmitting power to the PTO shaft 40 side. The PTO transmission mechanism 39 includes a Hi (high speed) gear stage 39a, a Lo (low speed) gear stage 39b, a transmission shaft 39c, and a shifter 39d. The PTO transmission mechanism 39 transmits the rotational power transmitted to the transmission shaft 38b to the transmission shaft 39c by shifting the rotational power transmitted to the transmission shaft 38b via the Hi-side gear 39a or the Lo-side gear 39b according to the position of the shifter 39d. Do.

  The PTO shaft 40 is coupled to a working machine side input shaft (not shown) via a universal joint shaft (not shown), and transmits rotational power from the engine 4 to the working machine. The PTO shaft 40 is disposed at the left and right center of the machine so as to be able to transmit power via the first gear 44, the second gear 45, etc., since the transmission shaft 39c is at a position deviated from the center of the machine.

  The transmission case 12 of this embodiment is divided into a front transmission case 12F on the front side in the front-rear direction and a rear transmission case 12R on the rear side in the front-rear direction, as shown in FIGS. The front transmission case 12F of the present embodiment, as shown in FIGS. 5 and 6, includes the clutch valve 55 for controlling the hydraulic multi-plate clutches C1 and C2 of the forward / reverse switching mechanism 15 and the Hi-Lo transmission mechanism 16. Clutch valve 56 for controlling the hydraulic multi-plate clutches C3 and C4, clutch valve 57 for controlling the hydraulic multi-plate clutch C5 of the PTO clutch mechanism 38, and for controlling the hydraulic multi-plate clutches C6 and C7 of the 2WD / 4WD switching mechanism 19. The clutch valve 64, the gear pump 70 and the like are separately disposed on the left and right surfaces. Here, as shown in FIG. 5, in the front transmission case 12F, the clutch valve 55, the clutch valve 56, and the clutch valve 64 are disposed on the surface on the right side in the vehicle width direction. On the other hand, as shown in FIG. 6, in the front transmission case 12F, the clutch valve 57 and the gear pump 70 are disposed on the surface on the left side in the vehicle width direction. As a result, the tractor 1 can efficiently arrange the clutch valves 55, 56, 57, 64, the gear pump 70, etc. on the outer surface of the front transmission case 12F.

  Although two case configurations of the front transmission case 12R and the rear transmission case 12R may be used, in the present embodiment, the spacer case 12S is further interposed between these cases 12F and 12R (FIG. 3) , 4). That is, a spacer case 12S is provided between the front transmission case 12F and the rear transmission case 12R of the transmission case 12 (FIG. 7), and the transmission shaft 22 and transmission shaft 23 of the main transmission mechanism 17 and the 2WD / 4WD switching mechanism 19 are provided. A metal portion 12Sa supporting the transmission shaft 32 is formed. With this configuration, the transmission shafts 22 and 23 and the transmission shaft 32 are supported by the metal portion 12Sa of the spacer case 12S between the front transmission case 12F and the rear transmission case 12R, whereby the metal structure on the front side of the rear transmission case 12R Can be omitted. The front transmission case 12F and the spacer case 12S are assembled so as to be connected, but the transmission shafts 22 and 23 and the transmission shaft 32 extending rearward in the front transmission case 12F are relatively heavy and handle in size These axes can be pivotally supported by the metal part 12Sa while finely adjusting and centering the easy-to-use spacer case 12S, and simultaneously can be joined to the rear face of the front transmission case 12F. As a result, the assembly work of the spacer case 12Sa together with the assembly of the internal gear and shaft. Make it easy.

  In addition, the spacer case 12S is formed in a flange portion slightly wider than the left and right width of the front transmission case 12F, and forms a dead space on the left and right side surfaces of the front transmission case 12F. The control clutch valves 55, 56, 57, 64 can be disposed.

  Next, the gear pump 70 as the hydraulic pump and its peripheral configuration will be described. The gear pump 70 sucks up the hydraulic oil contained in the transmission case 12 by its drive, and distributes it to the working machine lifting hydraulic circuit and the steering control hydraulic circuit, but as described above, the transmission case 12 (in the illustrated example) The front transmission case 12F is disposed on one side (left side in the illustrated example).

  On one side of the rear transmission case 12R, two suction filters 71, 71 are detachably provided on the same side as the gear pump 70 (left side in the illustrated example). The appropriate output side of the filters 71 and 71 is in communication with the gear pump 70 via a hose 76 and a pipe 77.

  As shown in FIGS. 9 to 13, the fuel tank 80 is made of resin and manufactured by blow molding, and is disposed on the left and right of the transmission case 12. The tank capacity of one left and right first fuel tank 80L is made larger than the capacity of the other left and right second fuel tank 80R. Among them, the first tank support plate 81L for receiving the bottom of the first fuel tank 80L is detachably bolted and supported by the mounting plate 78S to the transmission case 12 at the rear side, and the front side is the band plate 83 The floor panel portion of the safety frame structure and the floor panel portion of the cabin structure are suspended and supported by the anti-vibration support frame 82 that supports the transmission case 12 in a vibration-proof manner. The anti-vibration support frame 82 is detachably fixed to the side surface of the transmission case 12 (the front transmission case 12F in the illustrated example) by bolts.

  To describe the front side support configuration of the first fuel tank 80L in detail, the band plate 83 is simultaneously wound around the fuel tank 80L and the first tank support plate 81L and suspended by the anti-vibration support frame 82. Is divided into a first band plate 83a and a second band plate 83b, one end of the first band plate 83a is connected to the anti-vibration support plate 82, and the tank support plate 81 is bypassed from the outside of the first fuel tank 80L, The other end is connected to the second band plate 83b, and is suspended and supported by the first and second band plates 83a and 83b. Further, the first fuel tank 80L and the tank support plate 81L are fixed by the rear side band plate 85 immediately before the mounting plate 78S. The rear side band plate 85 is connected to the transmission case 12.

  In the first fuel tank 80L, the front side is the fueling portion 80a, the middle portion is the left and right wide portions, and the rear side is the bottom showing a diagonally higher height in a side view by the blow molding of resin. The shape of the first fuel tank 80L closer to the transmission case 12 side is formed so as not to interfere with each other when the gear pump 70 or the PTO control clutch valve 57 is mounted on the transmission case 12. Therefore, the first fuel tank 80L encloses the side of the PTO control clutch valve 57 and the gear pump 70, and protects them from a collision with other things. Further, the upper surfaces of the suction filters 71, 71 are surrounded by the rear side 80b of the fuel tank 80 and protected.

  Then, the second tank support plate 81R receiving the bottom of the other second fuel tank 80R is supported on the transmission case 12 by the mounting plate 78S common to the first fuel tank 80L at the rear side, Is supported on the transmission case 12 with the special mounting plate 78F, and the second fuel tank 80R and the second tank support plate 81R are simultaneously wound on the transmission case 12 by the band plate 86 immediately before the mounting plate 78S. doing.

  In the arrangement relationship between the first fuel tank 80L and the second fuel tank 80R, the front end of each tank is such that the first fuel tank 80L having a large capacity is present at the front and the second fuel tank 80R having a small capacity is present at the rear. The respective rear end portions have a relationship in which the rear end of the first fuel tank 80L is in substantially the same position as the rear end of the second fuel tank 80R.

  As described above, the first fuel tank 80L and the second fuel tank 80R are connected by the resin connection pipe 87 in order to provide the fuel supply port 80a on the first fuel tank 80L side. That is, the connecting pipe 87 whose one end is connected to the lower front side of the first fuel tank 80L is formed in a bent shape halfway and the other end is connected to the lower front end of the second fuel tank 80R in plan view It is formed in L type. More specifically, the connecting pipe 87 includes first to third connecting pipe parts 87a, 87b, 87c, and is formed in an L-shape between the straight first connecting pipe part 87a and the third connecting pipe part 87c. The second connection pipe 87b is fitted and connected to form the above-described L-shape in plan view, and the end of the first connection pipe portion 87a is formed at the front inner lower end of the first fuel tank 80L. The third connection pipe portion is connected to the second opening 89 in which the first connection pipe portion 87a is connected to face in the left-right direction, and the end of the third connection pipe portion 87c is formed in the lower end of the second fuel tank 80R. It connects so that 87c may turn to back and forth. At this time, the first opening 88 opens near the bottom of the first fuel tank 80L, and the second opening 89 opens near the bottom of the second fuel tank 80R. The bottom of the tank 80L and the bottom of the second fuel tank 80R have different heights, and the first opening 88 of the first fuel tank 80L is opposite to the second opening 89 of the second fuel tank 80R. It is provided low by a predetermined height L. Further, the second connection pipe portion 87b is bent toward an inclined portion gradually inclined from a fitting connection portion with the first connection pipe portion 87a and a connection fitting portion with the third connection pipe portion 87c. Form a part. The slope L earns the height L. The inclined portion range of the second connection pipe portion 87b is inclined so as to bypass the lower side of the front wheel differential input shaft 19e, but this inclined portion can facilitate the fuel movement to the first fuel tank 87L. it can.

  Next, for the fuel supply pipe 90 to the engine 4, a supply opening 91 is formed at the rear position of the connecting pipe 87 connecting portion of the first fuel tank 80L, and one end of the fuel supply pipe 90 is formed in the supply opening 91. Connected The connection structure is a known one in which the end portion of the fuel supply pipe 90 is fitted to the connection pipe 91a which is formed to project outward at the supply opening 91 to clamp and fix the outer periphery of the overlapping portion with a band. In the illustrated example, the sheet is extended toward the inside of the machine, then bent and guided forward, and further extended upward and connected to the feed pump outside the figure. Note that, as shown in the cross-sectional view of FIG. 13, the supply opening 91 is formed at the lowest height position that can be molded so as to supply the fuel at the bottom of the first fuel tank 80L with almost no remaining amount.

  In the vicinity of the fuel supply pipe 90, a return pipe 92 from the engine 4 is provided, and its end is disposed on the front side of the connecting pipe 87. The return opening 93 to the first fuel tank 80L of the return pipe 92 is formed at a relatively low position of the first fuel tank 80L. Thus, it is possible to prevent bubbling that tends to occur at reflux from a high place. Furthermore, the breather pipes 94L and 94R are connected to the rear side upper surfaces of the first fuel tank 80L and the second fuel tank 80R, respectively, and are extended upward to be appropriately connected to the main body.

  As shown in FIGS. 9 to 11, a battery 95 is disposed in the front space of the second fuel tank 80R. The supporting structure of the battery 95 will be described in detail with reference to FIGS. 14 to 18. A reinforcement bending member bent in a U-shape on the back side of the main body 96a of the base member to detachably attach the base member 96 made of sheet metal and provided with strength by bending left and right and front side downward to the transmission case 12F. 96b is welded and reinforced, and a fixing arm 96c extended to one side is configured to be able to be fastened and fixed to the bottom surface of the transmission case 12F, and further, the lower bent portion is penetrated and fixed laterally and the extended portion is bent It fixes to the side wall part of the transmission case 12F by the pipe-like arm 96d. A plate member 96e is disposed in parallel with the pipe-like arm 96dc so that the third connecting pipe portion 87c of the connecting pipe 87 can be tightened and fixed by a band body.

  A battery bracket 97 as a fixed support and protection cover of the battery 95 is detachably fixed to the base member 96. That is, the battery bracket 97 includes a main cover portion 97a formed in an L shape in front view so as to cover an outer surface and a partial upper surface of the battery 95 set inside, a secondary cover portion 97b covering the rear surface portion of the battery 95, and a battery A positioning projection plate 97c, hooks 99 and 99 for locking both ends of fixing rubber bands 98 and 98 of the battery 95, and a bottom plate portion 97d are provided. Of the hooks 99 and 99, the lower hooks 99a and 99a are provided on a member standing upright from the bottom plate 97d, and the upper hooks 99b and 99b are disposed on the upper inner wall of the main cover 97a. With regard to such an attachment / detachment configuration of the battery bracket 97, locking convex portions 97e, 97e formed by notching two portions surrounding the outer surface of the main cover portion 97a and being flush with the bottom plate portion 97d It can be positioned by sliding in the lateral lateral direction into locking portions 96f, 96f formed by the engaging pieces 96e, 96e attached to the member 96, and can be positioned appropriately (four places of 96g, 96g ... in the illustrated example) The battery bracket 97 can be detachably fixed to the base member 96 by fixing it with a bolt.

  In the battery bracket 97 supported by the base member 96, an upper surface cover portion 100a covering the outer half of the upper surface of the battery 95 and an outer surface cover portion 100b covering the outer surface are integrated with the front cover portion 100c covering the front portion as well. The exterior cover 100 thus formed is detachably fixed at two places of the front cover portion 100c from both the base member 96 and the battery bracket 97 from the front side by bolts. The front cover 100c may be replaced with a rear cover that covers the rear of the battery 95. The battery 95 is taken out or taken in from the side where the front cover or the rear cover 100 c is present.

  Among the harnesses connected to the plus terminal 101p and the minus terminal 101m of the battery 95, the plus terminal 101p side harness 102p is made to pass through the harness grommet 103 attached to the through hole provided in the main cover portion 97a of the battery bracket 97. The battery 95 is designed to have a waterproof effect on the battery 95 side. On the other hand, the minus terminal 101m side harness 102m is made to penetrate through an opening 97f formed in a step portion at the boundary between the main cover portion 97a of the battery bracket 97 and the upper surface cover portion 100a of the exterior cover 100. A seal may be added as appropriate to close the space around the harness at the opening 97f.

  Since it is the above structure, since the support structure for mounting the battery 95 is divided | segmented into the base member 96 directly fixed to the body and the battery bracket 97, manufacture is easy. In addition, when assembling to the airframe, the base member 96 is first fixed, but the assembly is easy because the weight reduction is achieved by being separated from the battery bracket 97. In particular, the battery bracket 97 is easily assembled because it is engaged with the locking projections 97e, 97e and the locking portions 96f, 96f.

  Furthermore, with the above configuration, when attaching the battery 95 alone, the exterior cover 100 is removed, and the battery 95 is placed on the battery bracket 97 outside the exterior cover 100 with its longitudinal direction along the body. Is inserted from The battery 95 inserted and positioned by the positioning projection plate 97c can be fixed by engaging the fixing rubber bands 98, 98 with the upper and lower hooks 99a, 99b. Then, the harnesses 102p and 102m are respectively connected to the plus terminal 101p and the minus terminal 101m, and then the exterior cover 100 is attached. When the battery 95 is removed, the process can be performed in the reverse process.

  Therefore, at the time of inspection and replacement of the battery 95, the main body of the battery 95 is taken out and attached from the front side of the vehicle by attaching and detaching only the exterior cover 100. Since the outer side can be opened, and the hand can be extended from the side to use the fastening bolt of the outer cover 100, the main body of the battery 95 and the harness-related removal and mounting tools, work efficiency is not reduced. That is, even if the battery bracket 97, which is a battery mounting portion, is provided utilizing the dead space inside the auxiliary step for lifting and lowering, the tool for removing and mounting the harness relationship from the gap between the auxiliary steps of several stages. Can be used. In the case where the auxiliary step is not opposed to the auxiliary step or provided on the side where the auxiliary step is not attached according to the one-side auxiliary step specification, the side surface of the battery bracket 97 is largely opened and there is no hindrance to the use of the tool.

  In the above embodiment, the main cover portion 97a of the battery bracket 97 covers a part of the upper surface of the battery 95, and the other upper surface is covered by the upper surface cover portion 100a of the exterior cover 100. As a result, the upper surface of the battery 95 is opened, and the inspection operation and the attachment / removal operation of the battery 95 are easy. Although the main cover portion 97 a of the battery bracket 97 covers a part of the upper surface of the battery 95, this function may be eliminated and the entire upper surface of the battery 95 may be the upper surface cover portion 100 a of the exterior cover 100.

  In addition, although the front cover portion 100c covering the front surface of the exterior cover 100 is configured, the present invention can also be applied to a case where the sub cover 97b of the battery bracket 97 covers the front surface of the battery 95. And the rear cover portion 100c.

  A base member 96 for mounting the battery 95 is formed in the front space portion of the second fuel tank 80R, and the lower surface between the base member 96 and the first tank support plate 81L of the first fuel tank 80L. A cover 104 is provided. The lower surface cover 104 corresponds to the first connection pipe portion 87a and the second connection pipe 87b of the connection pipe 87, and the lower surface cover 104 is configured to hold the connection pipe portion. Then, as described above, when the plate member 96c is disposed and the third connection pipe portion 87c of the connection pipe 87 is tightened and fixed by a band body, the third connection pipe portion 87c is a main cover of the battery bracket 97. It is arranged to pass through the inside of the airframe of the portion covering the outside surface of the battery 95 among the portion 97a (FIG. 18). The portion of the main cover 97a covering the outer side surface of the battery 95 forms a space portion through which the connecting pipe 87c can pass between the lower half portion and the transmission case 12, but the lower half portion and the upper half portion The space portion is secured by bending and forming.

  As described above, the base member 96 is formed on the side of the vehicle such as the transmission case 12, and the battery bracket 97 is provided on the base member 96, and the battery 95 is attached to and removed from the battery bracket 97. Since the exterior cover 100 is attached to and detached from the member 96 and / or the battery bracket 97, the inner side, the rear side and the upper surface of the battery 95 are partially covered by the main cover 97a and the sub cover 97b of the battery bracket 97. The front side and the top and the other half are covered with the exterior cover 100, and there is an effect of dust and dirt on the battery 95 inside.

  The mounting of the battery bracket 97 to the base member 96 is performed by laterally sliding the locking projections 97e, 97e on the locking portions 96f, 96f by the engaging pieces 96e, 96e attached to the base member 96 as described above. After inserting and positioning in the shape of a circle, a suitable place is fixed with a bolt, and a relatively narrow space sufficient for securing the slide amount in the lateral direction is sufficient, and the auxiliary step 104 for raising and lowering and the transmission case 12F It is easy to arrange in the interval part of, that is, to assemble. The attachment of the base member 96 to the transmission case 12 as a vehicle body is by bolting to the lower surface and the side surface of the transmission case 12, and this assembly is also easy.

80L fuel tank 80R fuel tank 87 communication pipe 87c communication pipe 95 battery 96 base member 96f locking portion 97 battery bracket 97a main cover portion 97b auxiliary cover portion 97c locking projection plate 97e locking convex portion 98 fixing band 99 hook 100 Exterior cover 100a Top cover 100b Side cover 100c Front (rear) cover

Claims (6)

A base member (96), a battery bracket (97) detachably fixed to the base member (96), and an outer cover (100) covering a battery (95) detachably fixed to the battery bracket (97) A top cover (100a) covering at least the outer side of the upper surface of the battery (95), an outer side cover (100b) covering the outer side, and a front face or a rear face on the outer cover (100); A tractor having a front cover or a rear cover (100c) to be covered. The battery bracket (97) covers the upper surface of the battery (95) together with the outer surface of the battery (95) fixed to the battery bracket (97) and the top cover portion (100a) of the exterior cover (100). It has a cover (97a) and a secondary cover (97b) covering the rear or front of the battery (95) on the side opposite to the front cover or rear cover (100c) by the outer cover (100) The tractor according to claim 1. Locking protrusions (97e, 97e) and locking portions (96f, 96f) are provided between the fixed base member (96) and the battery bracket (97), and the battery bracket is mounted on the base member (96) The tractor according to claim 1 or 2, wherein (97) is provided in a lockable manner. The battery bracket (97) includes the battery (95) positioning projection plate (97c) and the hooks (99, 99) of the battery (95) fixing band (98, 98). The tractor described in any one of the. The tractor according to any one of claims 1 to 4, wherein the battery (95) is disposed on the front side of a fuel tank (80R) attached to the side of the vehicle body. Fuel tanks (80L, 80R) are disposed on both left and right sides of the body, and both fuel tanks (80L, 80R) are connected in a fuel circulable manner by a connecting pipe (87), and a connecting pipe part in the middle of the connecting pipe (87) The tractor according to claim 5, wherein (87c) is held by the base member (96).