JP2008195319A - Working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working vehicle in which the positions of electrical units are easily known by supporting the electrical units in a vibration-isolating manner and providing them in a concentrated manner on an air-cut plate having a sound absorbing material provided thereon, loosening or detachment of the electrical units is prevented, the engine noise in a cabin is efficiently reduced, and the working efficiency is enhanced. <P>SOLUTION: A bonnet 2 with an engine 3 provided therein is provided in a front part of a vehicle body, and electrical units 104 are provided in a concentrated manner on a fitting plate 102 provided via a stay 100c on a front side 100a of an air-cut plate 100 provided between the bonnet 2 and a dashboard 17 continuous to a rear portion of the bonnet 2. A sound absorbing material 103 is provided on the front side 100a of the air-cut plate 100 provided on a vibration-isolating member 101. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a work vehicle provided with a bonnet for installing an engine at the front of an airframe, and more specifically, a stay on the front surface of an air cut plate provided between the bonnet and a dashboard connected to the rear of the bonnet. It is related with providing an electrical component in the attachment member provided via this.

  In a conventional tractor (work vehicle), for example, left and right frames are arranged over the front and rear of the fuselage, an engine is placed on the front of the frame, and a fuel tank and a battery are provided on the rear of the frame. The fuel piping that connects the fuel and the electrical wiring to each electrical equipment that connects the engine and the battery is divided into the left and right frames, and is flammable due to fuel leaks and ignition due to deterioration of the electrical wiring. There is a possibility that the possibility is reduced, safety is improved, and the maintenance is improved because it is separately provided for each purpose (Patent Document 1).

JP 7-315149 A

However, in such a tractor (work vehicle), relays that link the electrical wiring of each electrical equipment, electrical components such as couplers and fuses are scattered and installed in the bonnet. The position of the target electrical component is difficult to understand, and it is necessary for the operator to follow a narrow work space while referring to the manual, etc., and to attach and detach these electrical components. It was. Further, since the bonnet is not supported by vibration isolation, there is a problem that the electrical components included in the bonnet are loosened or detached due to vibrations during running or working of the airframe. Also, no soundproofing material is installed in the front part of the cabin, and the engine noise in the bonnet directly enters the cabin and the cabin habitability of the operator is low or the soundproofing material is installed, but the cabin and bonnet Since the soundproofing material is forcibly provided in a narrow space, there is a problem that the assembling workability is poor.
Accordingly, an object of the present invention is to provide electrical components in an aggregated manner on an air cut plate that is supported by vibration isolation and provided with a sound absorbing material so that the position of the electrical components can be easily understood, and at the same time, the electrical components can be loosened or detached. It is another object of the present invention to provide a work vehicle with improved workability that effectively prevents engine noise in the cabin.

  For this reason, the invention according to claim 1 is a work vehicle including a bonnet for installing an engine at a front part of an airframe, and an air cut plate provided between the bonnet and a dashboard provided continuously at a rear part of the bonnet. An electrical component is gathered and provided on a mounting member provided via a stay on the front surface of the housing.

  According to a second aspect of the present invention, in the work vehicle according to the first aspect, a sound absorbing material is provided on a rear surface of the air cut plate.

  According to a third aspect of the present invention, in the work vehicle according to the first aspect, the air cut plate is provided on a vibration isolation member.

  According to the first aspect of the present invention, in a work vehicle including a bonnet for installing the engine in the front part of the airframe, the front surface of the air cut plate provided between the bonnet and the dashboard continuously provided at the rear part of the bonnet. Since the electrical components are gathered and provided on the mounting member provided via the stay, the operator can easily find the desired electrical component and can quickly perform operations such as maintenance. Therefore, a work vehicle with improved workability can be provided.

  According to the invention described in claim 2, since the sound absorbing material is provided on the rear surface of the air cut plate, noise from the engine is absorbed by the sound absorbing material, and the noise intrusion to the control unit is reduced. The vehicle can be driven comfortably. Therefore, it is possible to provide a work vehicle with improved controllability.

  According to the third aspect of the present invention, since the air cut plate is provided on the vibration isolating member, the vibration of the vehicle transmitted to the air cut plate during traveling or working of the vehicle is reduced by the vibration isolating member, The electrical components provided on the front surface of the air cut plate are prevented from loosening or coming off, and the operation of each device connected to the electrical components can be normally maintained. Therefore, it is possible to provide a work vehicle that reduces the maintenance frequency and improves workability.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a left side view of a crawler tractor according to an embodiment of the present invention, FIG. 2 is a plan view of the tractor, FIG. 3 is a sectional side view of a drive unit in the tractor, and FIG. It is the cross-sectional top view which expanded the mechanism vicinity.

  First, a schematic configuration of the crawler tractor 1 will be described. As shown in FIG. 1, a bonnet 2 that covers an engine 3 at the front of the vehicle 1 and has a headlight 12 at the front end, and a vehicle 1 on the steering column 16 at the rear of the dashboard 17 is located behind the bonnet 2. A cabin 4 having a steering section of the vehicle 1 in which a steering handle 9 and a driver's seat 8 that control the operation of the vehicle are respectively disposed is disposed on the left and right body frames 11. On the left and right sides of the driver's seat 8, various levers such as a main transmission lever, a sub transmission lever, and a PTO operation lever (not shown) for operating the vehicle 1 and raising / lowering a working machine (not shown) are disposed. .

  Further, the cabin 4 is formed of the roof 5, the front / rear glass 114, the side glass door 15 and the like so as to cover the entire driver's seat 8. In addition, left and right fuel tanks 6 and left and right flasher lamps 7 are disposed on both sides of the driver's seat 8 and outside the cabin 4. Further, a step 10 for raising and lowering to the driver's seat 8 is provided below the cabin 4, and the working machine that can be removed depending on the work is attached to the rear of the vehicle 1. Work such as a rotary. In addition, a pair of left and right crawler type traveling devices 80 for traveling the vehicle 1 are disposed below the vehicle 1.

  The crawler type traveling device 80 includes a left and right crawler frame 81 extending in the traveling direction and two side frames 79 that connect the crawler frame 81. A left and right front axle case 82 is fixed to the front end of the crawler frame 81. The left and right drive sprocket 60 is supported on the left and right axles 89 supported by the left and right front axle cases 82. A left and right driven idler 85 is rotatably supported at the rear end of the crawler frame 81, and a crawler belt 88 is wound between the outer periphery of the driving sprocket 60 and the driven idler 85. The four equalizer wheels 86 are rotatably supported between the driven idler 85 and the front and rear.

  Hereinafter, first, the traveling and transmission system of the crawler tractor 1 will be described with reference to FIGS. The left and right axles 89 of the crawler type traveling device 80 are connected to the output shaft of the engine 3 via the forward / reverse switching mechanism 21, the main transmission gear transmission mechanism 22, the auxiliary transmission gear transmission mechanism 23, the traveling transmission shaft 24, and the differential mechanism 25. The PTO output shaft 29 that projects the rear transmission case 30a to the forward / reverse output shaft 26 of the forward / reverse switching mechanism 21 via the PTO clutch 27 and the PTO speed change gear transmission mechanism 28 while driving the vehicle 1 while being connected. Power is transmitted to the work machine that is connected and installed behind the machine body.

  Further, a forward / reverse switching mechanism 21 and a main transmission gear transmission mechanism 22 are provided in a transmission case 30b between the rear transmission case 30a and the engine 3, and the input shaft 31 of the forward / reverse switching mechanism 21 is connected via a damper 32. The main transmission shaft 33 of the main transmission gear transmission mechanism 22 is connected to the forward / reverse output shaft 26 of the forward / reverse switching mechanism 21 while being connected to the output shaft of the engine 3.

  Further, a sub-transmission gear transmission mechanism 23 is provided in the front part of the rear transmission case 30a, and a PTO transmission gear transmission mechanism 28 is provided in the rear part of the rear transmission case 30a. The main transmission shaft 33 is provided with the sub-transmission gear transmission mechanism 23. The auxiliary transmission shaft 34 is connected, the brake shaft 37 of the traveling brake device 36 is connected to the rear end of the auxiliary transmission shaft 34 via a pair of bevel gears 35, and the transmission is transmitted to the front end of the auxiliary transmission shaft 34 via the intermediate shaft 38. The rear end of the shaft 24 is connected.

  Next, the front mission case 30c is provided with a differential mechanism 25 including a left and right planetary gear mechanism 39, and a left and right sides are connected to the front end of the traveling transmission shaft 24 via a differential input shaft 40, a bevel gear 41, and a planetary gear input shaft 42. The planetary gear mechanism 39 is connected, and the traveling shift output from the traveling transmission shaft 24 is transmitted to the left and right axles 89 via the left and right planetary gear mechanisms 39 and the planetary gear output shaft 43, so that the left and right crawler type traveling devices 80 are identical at substantially the same speed. It is set as the structure which drives to a direction and makes the vehicle 1 drive forward or backward.

  Further, the turning HST pump 44 and the turning HST motor 45 of the turning hydraulic transmission mechanism (HST) for turning the machine body are separately arranged. For example, the turning HST pump 44 is arranged on the right outer side of the transmission case 30b. The pump shaft of the turning HST pump 44 is connected to the front end of the main transmission shaft 33 via a set of three transmission gears 46 so that the power after the main transmission is input to the pump shaft, and the front transmission case 30c The turning HST motor 45 is fixed to the front surface of the motor, and the motor shaft of the turning HST motor 45 is connected to the left and right planetary gear mechanism 39 via the left and right reversing bevel gear 49 and the left and right gear shafts 50. Steering output to be shifted by the turning HST motor 45 is transmitted to the left and right axles 89 via the left and right planetary gear mechanism 39, and the left and right crawler traveling Device 80 is driven at a substantially constant speed, and the rotational difference of the left and right crawler type traveling device 80 is proportional to the traveling speed of the main gear shift stage, and the left or right at the same turning radius even if the main gear shift stage is switched. It is set as the structure which turns a body in a direction.

  Furthermore, an air conditioner (not shown) or the like can be provided in the cabin 4 of the vehicle 1. In this case, since the engine 3 is loaded by the air conditioner drive, a controller (not shown) that electronically controls the rotational speed of the engine 3 is provided. With this controller, the number of revolutions of a cooling fan that cools a condenser (not shown) of the air conditioner is proportional to the number of revolutions of the engine 3, and the controller sets the idling speed of the engine 3 to be less than that when the air conditioner is stopped. When the engine 3 is idling up, the speed of the engine 3 is increased so that the controller 3 is proportional to the height of the refrigerant pressure detected by a pressure sensor (not shown). You may make it the structure which sets this.

  Next, a specific configuration of the air cut plate in which the electrical components according to the present invention are assembled and attached will be described. 5 is a schematic diagram of the left side surface near the dashboard showing the air cut plate, FIG. 6 is a front view of a mounting plate provided on the front surface of the air cut plate, and FIG. 7 is an enlarged view of the air cut plate provided with a sound absorbing material. It is the left side schematic diagram.

  As shown in FIG. 5, between the cabin 4 and the bonnet 2, an air cut plate 100 made of metal or the like that can withstand the heat generation of the engine 3 is disposed on the left and right body frames 11 between the cabin 4 and the front lower center. For example, a natural rubber, a left and right vibration isolating member 101 made of synthetic rubber such as chloroprene rubber, nitrile rubber, butyl rubber, and the like. A dashboard 17 to which the steering handle 9 and the like are attached is fixed. Note that the material of the vibration isolation member 101 is not limited to the above.

  The air cut plate 100 partitions the cabin 4 and the engine 3 in the bonnet 2 to prevent the hot air and exhaust gas from the engine 3 from entering the cabin 4.

  Further, a front surface 100 a of the air cut plate 100, which is provided on the front surface 100 a via a stay 100 c and made of metal or the like that can withstand the heat generated by the engine 3, and the air cut plate 100. As shown in FIG. 7, for example, a sheet-like sound absorbing material 103 made of urethane foam, soft urethane, gypsum board, glass wool, or the like is bolted to the front surface 100 a of the air cut plate 100. Attached with resin adhesive. The material and attachment method of the sound absorbing material 103 are not limited to the above.

  Next, between the mounting plate 102 and the engine 3 and on the front surface 102a of the mounting plate 102, electrical components 104 such as relays, couplers, fuses and the like that link the wiring of each electrical device of the vehicle 1 are gathered. Can be attached. As shown in FIG. 6, first, for example, in the vicinity of the upper end portion of the front surface 102a of the mounting plate 102 (in the vicinity of the left end portion in the left-right direction of the fuselage in FIG. 6), the headlight 12 and the flasher lamp 7 are illuminated. A fuse unit in which various fuses 105 connected to an audio unit such as a radio (not shown) in the cabin 4, a wiper of a windshield 13 (not shown) of the cabin 4, an air conditioner (not shown), the engine 3, etc. are collectively attached. 106 is provided, and the fuse portion 106 is covered with a removable cover 107 made of rubber or the like.

  Next, in the vicinity of the center of the front surface 102a of the mounting plate 102 and below the fuse portion 106, for example, the light 12, the power steering of the steering handle 9, the starter of the engine 3, the wiper, etc. A relay unit 109 is provided in which each of the relays 108 that supply power is gathered and attached in a line in the left-right direction of the machine body.

  Further, in the vicinity of the end portion of the front surface 102a of the mounting plate 102 and on the side of the fuse portion 106 and the relay portion 109 (in the vicinity of the right end portion in the left-right direction of the fuselage in FIG. 6), for example, the light 12 Harness, coupler 110a, harness connected to the air conditioner, coupler 110b, harness connected to the engine 3, coupler 110c, harness connected to a controller (not shown), coupler 110d, A connector portion 111 including a harness and coupler 110e connected to audios in the cabin 4 and the harness and coupler 110f connected to the wiper and the like is provided.

  The positions and order of arrangement of the fuse part 106, the relay part 109, and the connector part 111 are not limited to the above, and the fuse part 106, the relay part 109, and the connector part 111 are respectively connected to the front surface 102a of the mounting plate 102. It suffices to arrange them together. In addition, the types of the electrical components 104 in the fuse unit 106, the relay unit 109, and the connector unit 111 are just examples, and the names of the electrical components that connect other devices are omitted.

  With the configuration as described above, the operator opens the bonnet 2, and the fuse unit 106 including the electrical component 104 such as the target fuse 105, the relay 108, the harness, and the coupler 110 on the front surface 102 a of the mounting plate 102, the relay unit 109, and can be easily found from the connector part 111, and work such as maintenance can be quickly performed. Further, since the air cut plate 100 is installed on the vibration isolating member 101, the vibration of the vehicle 1 transmitted to the air cut plate 100 when the vehicle 1 is traveling or working is reduced by the vibration isolating member 101. The fuse 105, relay 108, harnesses, couplers 110a to 110f provided on the front surface 102a of the mounting plate 102 of the cut plate 100 are prevented from loosening and coming off, and the operation of each device connected to the electrical component 104 is normally performed. Can be retained. Furthermore, noise from the engine 3 is absorbed and sound-insulated by the sound absorbing material 103 provided on the front surface 100 a of the air cut plate 100 and the electrical component 104 provided on the front surface 102 a of the mounting plate 102 and enters the cabin 4. Noise from the engine 3 is reduced, and the operator can comfortably drive the vehicle 1.

  As described in detail above, the crawler tractor 1 of this example includes the bonnet 2 in which the engine 3 is installed in the front part of the machine body, and between the bonnet 2 and the dashboard 17 that is provided continuously at the rear part of the bonnet 2. The electrical component 104 is provided on the mounting plate 102 (mounting member) provided on the front surface 100a of the provided air cut plate 100 via the stay 100c. In addition, a sound absorbing material 103 is provided on the front surface 100 a of the air cut plate 100 provided on the vibration isolation member 101.

  In the above-described example, the crawler tractor (agricultural work vehicle) including a cabin is described as an example of the work vehicle. However, the present invention is not limited to this, and the wheel tractor, the combine as the agricultural work vehicle, Further, the construction work vehicle can be applied to any work vehicle having a dashboard and a bonnet, such as a backhoe and a bulltoza.

It is a left view which shows the crawler type tractor as an example of this invention. It is a top view of a crawler type tractor. It is a cross-sectional side view of the drive part in a crawler type tractor. It is the cross-sectional top view which expanded the differential mechanism vicinity in a mission case. It is a left side surface schematic diagram near the dashboard which shows an air cut plate. It is a front view of the mounting plate provided in the front of the air cut plate. It is the left side schematic diagram which expanded and showed the air cut plate provided with a sound-absorbing material.

Explanation of symbols

2 Bonnet 3 Engine 4 Cabin 17 Dashboard 100 Air cut plate 100a, 102a Front surface 100b Rear surface 100c Stay 101 Vibration isolation member 102 Mounting plate (mounting member)
DESCRIPTION OF SYMBOLS 103 Sound absorbing material 104 Electrical component 105 Fuse 106 Fuse part 107 Cover 108 Relay 109 Relay part 110a Harness connected to lighting, coupler 110b Harness connected to air conditioner, coupler 110c Harness connected to engine, coupler 110d Harness connected to controller, Coupler 110e Harness to connect to cabin audio, coupler 110f Wiper to connect to harness, coupler harness, coupler 111 Connector

Claims (3)

In a work vehicle equipped with a bonnet for installing an engine at the front of the aircraft,
A work vehicle characterized in that electrical components are collectively provided on a mounting member provided via a stay on the front surface of an air cut plate provided between the bonnet and a dashboard continuously provided at the rear of the bonnet. .   The work vehicle according to claim 1, further comprising a sound absorbing material on a front surface of the air cut plate.   The work vehicle according to claim 1, wherein the air cut plate is provided on a vibration isolation member.

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