JP2008087490A - Working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent occurrence of disadvantage due to unnecessary dimensional increase of a bonnet in a working vehicle. <P>SOLUTION: The bonnet 25 covering an engine 3 is provided with a swelling portion 25C, and peripheral equipment A of the engine 3 is arranged inside the swelling portion 25C. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a work vehicle including a bonnet that covers an engine.

In a work vehicle, for the reason of improving the appearance, generally, the bonnet is formed symmetrically (see, for example, Patent Document 1).
Japanese Patent No. 3599479

  According to the above configuration, when a part of the engine and its peripheral devices deployed in the bonnet partially protrudes to the left and right sides, the bonnet should be symmetrical to match the protruding part. Since it is formed, the bonnet becomes unnecessarily large, and the cost tends to increase.

  In particular, when the bonnet is located in front of the boarding operation part, the front and lower visibility is obstructed, so that the vehicle body travels while grasping the situation of the front and lower work place, etc. become.

  An object of the present invention is to prevent the occurrence of inconvenience due to an unnecessarily large bonnet.

  In order to achieve the above object, in the invention according to claim 1 of the present invention, a bulging portion is provided in a bonnet covering the engine, and peripheral devices of the engine are arranged inside the bulging portion. It is characterized by that.

  According to this characteristic configuration, when a part of the engine or its peripheral equipment deployed in the bonnet partially projects to the left and right sides, a bulging part corresponding to the projecting part is provided in the bonnet. The engine that protrudes partially and its peripheral devices are positioned inside the bulging portion.

  This prevents the bonnet from becoming unnecessarily large compared to the case where the bonnet is formed symmetrically in accordance with the overhanging portion, and avoids an increase in cost due to the enlargement of the bonnet. can do.

  In addition, when the bonnet is positioned in front of the boarding operation unit, it is possible to prevent the front and lower visibility from being obstructed by the bonnet, and the work traveling in which the vehicle body is driven while grasping the situation of the front and lower work sites. It becomes easy to do.

  Therefore, it is possible to avoid an increase in cost due to an increase in the size of the hood, and to improve workability.

  According to a second aspect of the present invention, in the invention according to the first aspect, the peripheral device is powered by the engine disposed in the bonnet in an attitude in which the output shaft is oriented left and right. It is the transmission mechanism which transmits.

  According to this characteristic configuration, in order to improve the left-right balance of the vehicle body, for example, if a heavy object such as a radiator, which is an example of an engine or its peripheral device, is arranged in a balanced manner in the left-right center of the vehicle body, There is a tendency that a relatively light-weight transmission mechanism extending from the side portion is provided in a state of extending to the left and right sides.

  Therefore, a bulging part is formed at the corresponding part of the transmission mechanism in the bonnet, and the transmission mechanism is positioned inside the bulging part, thereby preventing the bonnet from becoming unnecessarily large. However, heavy objects such as engines and radiators can be arranged in a balanced manner at the left and right center of the vehicle body.

  Therefore, it is possible to improve the left-right balance of the vehicle body while avoiding a rise in cost due to the enlargement of the hood.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, a step is laid around the engine, and a notch is formed at the overlapping portion with the bulging portion in the step. A portion is formed.

  According to this characteristic configuration, the bonnet is formed symmetrically in accordance with the overhanging portion, and the area of the step is ensured wider than in the case where the overlapping portion with the bonnet in the step is cut out in accordance with the bonnet. be able to.

  Therefore, it becomes easy to perform boarding / alighting using the step and work on the step.

  FIGS. 1 to 5 show a driving part 2 formed at the front part of a traveling vehicle body 1 in a riding type rice transplanter which is an example of a work vehicle. Power from the mounted water-cooled engine 3 is converted into a belt-type transmission mechanism 4 (an example of the peripheral device A), a hydrostatic continuously variable transmission 5 provided as a main transmission, and a transmission case as an auxiliary transmission. 6 is configured to be a four-wheel drive type that transmits to a pair of left and right front wheels (not shown) and a rear wheel (not shown) via a gear-type transmission (not shown) installed in 6.

  Although not shown, a seedling planting device is connected to the rear portion of the traveling vehicle body 1 through a link mechanism that is driven to swing up and down by the operation of a hydraulic cylinder so as to be driven up and down.

  In addition, the seedling planting device is configured such that the working power from the work transmission system built in the transmission case 6 is transmitted to the power distribution mechanism, so that the seedling placing table on which a plurality of mat-like seedlings are placed is fixed in the left-right direction. A plurality of rotary planting mechanisms, which are driven back and forth by a stroke and arranged in parallel in the left-right direction, take out a predetermined amount of planted seedlings from the lower end of the seedling stage, and use a plurality of leveling floats. It is driven so that it is planted in the mud portion of the leveled field, and each mat-like seedling is vertically fed at a predetermined pitch toward the lower end of the seedling stage each time the seedling stage reaches the left and right stroke ends. It is configured to plant a plurality of seedlings.

  As shown in FIGS. 1 to 5, the engine 3 is mounted on an engine frame 7 extending forward from the mission case 6 via four mounting rubbers 8 and a pair of front and rear support members 9. The output shaft 3A is supported in a posture in which the output shaft 3A is directed to the left and right.

  The engine frame 7 is formed so as to be located higher toward the front side, which is the support position of the engine 3, and the ground height of the front part (the height position of the lower edge) extends from the transmission case 6 to the left and right. The front axle case 10 is set so as to be substantially at the same height as the upper end.

  As a result, the engine 3 has a relatively high height position of the output shaft 3A that is substantially the same as the height position of the tread 12a of the step 12 laid on the boarding operation section 11 formed behind the driving section 2. Placed in position.

  Step 12 is made of sheet metal in which an opening 12A that allows deployment of the engine 3, the steering operation system 13, and the like is formed in the center of the left and right of the front part, and the rear part 12B located behind the engine 3 is in operation. The front part 12C located on the left and right of the engine 3 functions as a boarding step that serves as a foothold, and functions as a front fender that covers the left and right front wheels from above, and a boarding / unloading step that enables the vehicle body 1 to get on and off from the front. It is formed to do.

  The steering operation system 13 includes a steering shaft 16 extending downward from the steering wheel 15 and a steering wheel 15 disposed on an upper portion of a panel 14 erected so as to cover the rear side of the opening 12A in step 12. The power steering device 17 disposed on the upper portion of the transmission case 6 is connected to the left and right front wheels.

  On the left side of the engine 3, a starter 18 (an example of the peripheral device A) is equipped so that the whole is positioned above the tread 12 a of the step 12.

  In the upper right part of the engine 3, a cooling fan 20 (an example of the peripheral device A) driven by the power from the output shaft 3A transmitted through the fan belt 19, a water pump 21 (an example of the peripheral device A), and The generators 22 (an example of the peripheral device A) are equipped so that their entirety is located above the tread surface 12a of the step 12.

  On the right side of the engine 3, a radiator 23 (an example of the peripheral device A) is disposed so that the whole is positioned above the tread 12 a of step 12.

  Above the engine 3, an air cleaner 24 (an example of the peripheral device A) is provided with the intake port 24A facing upward.

  The engine 3 and the peripheral device A of the engine 3 described above are covered from above by the bonnet 25, and a muffler 26 (an example of the peripheral device A) is located at the front left of the bonnet 25, and the exhaust port 26A is upward. The whole is positioned so as to be positioned above the tread surface 12a of the step 12 in a vertically oriented posture.

  That is, the starter 18, the cooling fan 20, the water pump 21, the generator 22, the radiator 23, the air cleaner 24, and the muffler 26, which are peripheral devices A of the engine 3, are compared so that muddy water is not easily applied to the driver. The engine 3 is disposed at a position above the tread surface 12a of the step 12 that is set at a relatively high position, and the engine 3 has a relatively high position where the output shaft 3A is substantially the same height as the tread surface 12a of the step 12. Therefore, even when working in Fukada, it is possible to effectively prevent the mud splashed by the wheels from being applied to the engine 3 and its peripheral device A. The starter motor (not shown) stops moving due to the muddy water on 18 and the radiator 23 is clogged with mud adhering to the engine cooling. Rate is lowered, or the engine 3 fails draws in mud from the air cleaner 24, problems such as it is possible to effectively prevent the risk of occurrence.

  Further, since the muffler 26 is arranged outside the hood 25, the temperature rise around the engine due to the muffler 26 being arranged inside the hood 25 can be prevented, and the engine cooling efficiency can be improved.

  As shown in FIGS. 1 to 5, the bonnet 25 is formed with a notch 25 </ b> A for passing an exhaust pipe 27 extending from the engine 3 to the muffler 26 at the lower left front portion. The bonnet 25 can be opened / closed without the need to remove the muffler 26 while being deployed.

  As shown in FIGS. 1 to 4, the bonnet 25 has the cooling fan 20 and the radiator 23 disposed at a relatively high position above the tread surface 12 a of the step 12. A plurality of slit-like intake holes 25B for introducing cooling air around the radiator 23, the engine 3, and the like are formed at relatively high upper positions away from the tread surface 12a of the step 12 on both the left and right sides thereof. .

  Thus, for example, even if a spare seedling is placed on the front portion 12C of the step 12 located on the left and right sides of the engine 3 in order to reduce the number of times the spare seedling is replenished to the bag, the intake hole 25B is covered by the spare seedling. It is possible to prevent concealment, and in the case where a fertilizer application device and a chemical spraying device are additionally provided, fertilizer is added to the front portion 12C of step 12 in order to reduce the number of times the fertilizer bag and the chemical bag are replenished. Even if a bag or a medicine bag is placed, the fertilizer bag or the medicine bag can prevent the intake hole 25B from being obscured, and as a result, work efficiency can be improved while ensuring cooling performance. .

  The cooling air is sucked into the bonnet 25 from the intake holes 25B on the right side of the bonnet 25 by the suction action of the cooling fan 20, passes through the radiator 23, the periphery of the engine 3, and the like. While being discharged to the outside of the bonnet 25 from each intake hole 25B, it is guided to the periphery of the continuously variable transmission 5 by the suction action of the fan 28 provided on the input shaft 5A of the continuously variable transmission 5, and then left of the vehicle body. It is discharged outward.

  As shown in FIG. 3, the radiator 23 is arranged and set so that the center thereof is located on the rear side of the traveling vehicle body 1 with respect to the rotation center of the cooling fan 22. That is, since the radiator 23 that is more bulky than the cooling fan 22 is arranged in a state of being moved toward the rear side of the traveling vehicle body 1, it is compared with a case where the center of the radiator 23 and the rotation center of the cooling fan 22 are aligned. Thus, the extension of the radiator 23 to the front side of the traveling vehicle body 1 can be suppressed, and the extension length of the upper side of the bonnet 25 to the front side is shortened accordingly, and the front side of the bonnet 25 is also reduced. As a result, it is possible to secure a wider front field of view, and it is easy to perform work traveling such as traveling the vehicle body while grasping the situation of the work area in front and lower.

  As shown in FIGS. 3 to 5, the radiator 23 is supported via a support base 29 on the right and left support members 9 interposed between the engine 3 and the corresponding mount rubber 8. That is, the radiator 23 is supported together with the engine 3 by the front and rear support members 9 supported by the engine frame 7 via the four mount rubbers 8, thereby allowing the radiator 23 to be attached via a dedicated mount rubber or the like. In comparison with the case where the engine frame 7 is supported, the cooling hose 30 extending between the water pump 21 and the radiator 23 can be made less likely to be subjected to a burden such as bending or twisting due to vibration of the engine 3 or the vehicle body, The durability of the cooling hose 30 can be improved.

  As shown in FIGS. 4 and 5, heavy objects such as the engine 3, continuously variable transmission 5, transmission case 6, and radiator 23 are placed in the left and right center of the front part of the vehicle body in order to improve the left and right balance of the vehicle body. It is well-balanced. Therefore, a relatively lightweight transmission mechanism 4 extending between the output shaft 3A of the engine 3 and the input shaft 5A of the continuously variable transmission 5 connected to the left side of the transmission case 6 is provided on the left side of the engine 3 and the continuously variable transmission 5. It will be located in a state of overhanging.

  Therefore, a bulging portion 25C that bulges outward to the left is formed at the lower left portion of the bonnet 25, and a notch 12D is formed at the overlapping position with the bulging portion 25C in step 12, and the bulge is formed. The output pulley 31 side of the transmission mechanism 4 is positioned inside the portion 25C.

  In other words, the bulge 25C is formed in the bonnet 25 so that the minimum space required to position the output pulley 31 side of the transmission mechanism 4 is provided inside the bonnet 25, so that the transmission projecting to the left. Compared with the case where the bonnet 25 is formed symmetrically in consideration of the mechanism 4, the bonnet 25 becomes unnecessarily large, and the transmission mechanism in the left and right front portions 12C of the step 12 functioning as a getting-on / off step. It is possible to prevent the right front side portion 12C where 4 is not provided from becoming unnecessarily narrow as the left front side portion 12C where the transmission mechanism 4 is provided.

  As a result, it is possible to prevent the front and lower view from being obstructed from the boarding operation unit 11 by the bonnet 25, and it is easy to perform work traveling such as traveling the vehicle body while grasping the state of the work area in the front and lower direction. Further, the area of the right front side portion 12C of the left and right front side portions 12C of the step 12 functioning as a boarding / alighting step can be ensured more widely. It becomes easy to perform the operation using the right front side portion 12C such as receiving the prepared seedling and supplying it to the seedling planting device at the rear of the vehicle body.

    [Another embodiment]

[1] The riding-type work vehicle may be a riding-type management machine or a tractor that performs management work such as fertilization work or chemical spraying work.

[2] The engine 3 may be an air-cooled type. Further, the engine 3 may be mounted in a posture in which the output shaft 3A is oriented in the front-rear direction.

[3] The engine 3 and its peripheral device A may be provided below the driver seat in the boarding operation unit 11 or behind the boarding operation unit 11.

[4] The peripheral device A of the engine 3 may be arranged in the vicinity of the tread surface 12a in step 12 or at a position below the tread surface 12a.

[5] Various changes can be made to the formation position of the bulging portion 25C in the bonnet 25 depending on the arrangement of the peripheral device A.

[6] Peripheral devices A arranged inside the bulging portion 25C include a starter 18, a cooling fan 20, a water pump 21, a generator 22, a radiator 23, an air cleaner 24, a muffler 26, or a flywheel. There may be.

[7] The transmission mechanism 4 may be a shaft type provided with a transmission shaft, a bevel gear or a universal joint, or a chain type provided with a transmission chain, a sprocket, or the like.

[8] The formation position of the notch 12D in step 12 is changed according to the formation position of the bulging portion 25C, and may not be formed depending on the formation position of the bulging portion 25C. is there.

Left side view showing the configuration of the prime mover of the riding rice transplanter Longitudinal left side view showing the structure of the prime mover of the riding rice transplanter Longitudinal right side view showing the structure of the prime mover of the riding rice transplanter Longitudinal front view showing the configuration of the prime mover of the riding rice transplanter Cross-sectional plan view showing the structure of the prime mover of the riding rice transplanter

Explanation of symbols

3 Engine 25 Bonnet 25C Expansion part A Peripheral equipment 3A Output shaft 4 Transmission mechanism 12 Step 12D Notch

Claims (3)

  A working vehicle characterized in that a bulging portion is provided in a hood covering the engine, and peripheral devices of the engine are arranged inside the bulging portion.   2. The work vehicle according to claim 1, wherein the peripheral device is a transmission mechanism that transmits power from the engine disposed in the bonnet in a posture in which an output shaft is directed to the left and right.   The work vehicle according to claim 1 or 2, wherein a step is laid around the engine, and a notch is formed at a position where the bulge is formed in the step.

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