Work vehicle

Abstract

To provide a working vehicle having a dustproof net which is hardly affected by vibration.SOLUTION: In a working vehicle provided with a rectangular dustproof net 63 for preventing the passage of dust at the front part of a radiator 60, rails 604 for fixing the dustproof net 63 are provided up and down, the dustproof net 63 is constituted so as to be freely pulled out by sliding in the lateral direction, and the lower rail 604 is provided with a low position part 604d lower than a mounting time supporting part 604c supporting the dustproof net in a mounted state, and the end part of the upper rail 604a on the pulling-out direction side is located inside the end part of the lower rail 604b on the pulling-out direction side.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to work vehicles such as agricultural tractors. [Background technology]

[0002] A work vehicle has been disclosed that has a dustproof net in front of the radiator that prevents dust from passing through and clogging the radiator, and the dustproof net is fixed with an upper regulating member and a lower regulating member, and by making the upper regulating member short, the dustproof net can be pulled out diagonally upwards (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-30521 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the configuration described in Patent Document 1, the regulating portion of the upper regulating member is half or one-third the length of the dustproof net. If the upper regulating member, which is a member that fixes the upper frame of the dustproof net, is short, the dustproof net becomes unstable due to vibrations caused by traveling, so improvement is required.

[0005] An object of the present invention is to provide a work vehicle having a dustproof net fixing portion that is less susceptible to the effects of vibration. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the invention described in claim 1 provides a work vehicle equipped with a rectangular dustproof net (63) in front of a radiator (60) to prevent the passage of dust, wherein rails (64) for fixing the dustproof net (63) are provided at the top and bottom, and the dustproof net (63) is configured to be slidable in the left and right directions and be removable, and the lower rail (64b) has a lower portion (64d) that is lower than the support portion (64c) for when installed that supports the net in the installed state, and the end of the upper rail (64a) on the removal direction side is located more inward than the end of the lower rail on the removal direction side.

[0007] In the invention described in claim 2, the mounting support portion is configured to be at approximately the same height on the lower rail.

[0008] In the invention described in claim 3, the upper end of the lower portion (64d) of the lower rail (64b) is configured to be higher than the lower end of the mounting support portion (64c).

[0009] In the invention described in claim 4, an inclined portion (64e) is provided between the mounting support portion (64c) and the lower portion (64d).

[0010] In the invention described in claim 5, the lower portion (64d) has a notch (64f). [Effects of the Invention]

[0011] According to the invention described in claim 1, by providing a step in the lower rail (64b) arranged below the dustproof net (64), the upper rail (64a) arranged above the dustproof net (64) can be made longer, and therefore the net is less susceptible to the effects of vibration.

[0012] According to the second aspect of the invention, in addition to the effect of the first aspect, the dustproof nets (64) can be provided in parallel, which makes them stable and less susceptible to vibration.

[0013] According to the invention of claim 3, in addition to the effect of claim 2, the upper end of the lower portion (64d) is higher than the lower end of the support portion (64c) during installation, so that the device is less susceptible to the effects of vibration.

[0014] According to the fourth aspect of the invention, in addition to the effect of the third aspect, the inclined portion (64e) allows the dustproof net (64) to be pulled out stably.

[0015] According to the fifth aspect of the invention, in addition to the features of the fourth aspect, the cutout portion (64f) is provided, so that liquid, dust, and the like that have entered the lower rail (64b) can be discharged. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is an overall side view of a tractor according to an embodiment of the present invention; [Figure 2] 1 is a perspective view showing an internal configuration of a bonnet according to an embodiment of the present invention; [Figure 3] 1 is a perspective view of an engine body and peripheral devices according to an embodiment of the present invention. [Figure 4] FIG. 2 is a right side view of the front part of the tractor according to the embodiment of the present invention. [Figure 5] 1 is a schematic perspective view of a front room portion inside a bonnet according to an embodiment of the present invention; [Figure 6] 1A and 1B are front views of a dustproof net and its surroundings according to an embodiment of the present invention. [Figure 7] 1 is a perspective view of a dustproof net and its surroundings according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] An embodiment of the present invention will be described below. In the description of the embodiment, the left and right directions facing the forward direction of the aircraft will be referred to as left and right, respectively, and the forward direction will be referred to as front and the backward direction will be referred to as rear, but this does not limit the configuration of the present invention.

[0018] FIG. 1 shows a tractor. A diesel engine E is mounted inside a hood 2 at the front of a vehicle body 1. The rotational power of the engine E is transmitted to a transmission in a transmission case 3, which then reduces the speed and transmits the rotational power to front wheels 4 and rear wheels 5. A steering wheel 6 for steering the front wheels 4 is mounted behind the engine E, and a driver's seat 7 is located behind the steering wheel 6. A hydraulic cylinder case 8 is mounted at the upper rear of the transmission case 3, and lift arms 9, which form part of a hydraulic lifting mechanism, are rotatably attached to both the left and right sides of the cylinder case 8. The lift arms 9 move up and down by the extension and contraction of lifting hydraulic cylinders 10. A three-point link mechanism consisting of a top link 11 and left and right lower links 12 is mounted at the rear of the vehicle body. A rotary work machine R is attached to this link mechanism, and the lower links 12 are connected to the lift arms 9 via lift rods 13, allowing the work machine R to be raised and lowered.

[0019] The steering wheel 6, driver's seat 7, etc. are covered by a cabin 16. The cabin 16 is fixed to the vehicle body via an elastic member such as vibration-isolating rubber, making it difficult for vibrations of the vehicle body to be transmitted to the cabin 16.

[0020] The cabin 16 is an integrated framework consisting of a floor 17, front pillars 18 erected at the left and right front of the floor 17, rear pillars 19 erected at the left and right rear of the driver's seat 7, intermediate pillars 20 erected at the midpoint between the front and rear, and an upper frame 21 connecting the upper ends of these pillars, and is covered with a roof 22. Strength is ensured by rigidifying components such as a box-shaped seat frame 23 that supports the driver's seat 7, a rear plate 24 that surrounds the rear of the driver's seat 7, and left and right fenders 25 that cover the tops of the rear wheels 5. Furthermore, glass windows are provided on the front and rear sides, and passengers can enter and exit the cabin through left and right opening doors 26.

[0021] A weight bracket 28 is attached to the front end of the traveling vehicle body 1 to mount a weight 27 for maintaining the weight balance of the vehicle. The weight bracket 28 is formed in a bow shape, and the weight 27 is attached to the inner peripheral surface. The forward projection of the weight 27 can be minimized, so it does not interfere with turning.

[0022] A diesel engine, for example, is used as the engine E. As shown in Fig. 2 and other figures, the engine E has a cylinder head 32 and other components provided on the top of a cylinder block 31, and an oil pan 34 provided below the cylinder block 31. The engine E also has a cooling fan 35 and other components provided in front of the cylinder block 31, and a flywheel 36 connected to the crankshaft and other components provided below and behind the cylinder block 31.

[0023] The cylinder block 31 has a plurality of cylinders in which a plurality of pistons connected to a crankshaft (not shown) are arranged to reciprocate inside. The cooling fan 35 is rotated by a fan belt 38 that is wound around and rotated by related parts such as a pulley connected to the crankshaft, an alternator 37, and a compressor 39.

[0024] In this tractor, an exhaust gas treatment device 40 is installed at the upper rear of the engine E, as shown in FIG.

[0025] The exhaust gas treatment device 40 is a device that purifies exhaust gas emitted from the engine E, which is a diesel engine, and uses, for example, a device structured so that an oxidation catalyst (DOC) and a diesel particulate filter (DPF) are installed in series inside a cylindrical container (not shown) and allow exhaust gas to pass through. The DOC oxidizes and detoxifies harmful components in the exhaust gas. The DPF captures particulate matter contained in the exhaust gas.

[0026] The exhaust gas treatment device 40 in this embodiment takes in exhaust gas discharged through an exhaust manifold (not shown) of the engine E. The exhaust gas treated by the exhaust gas treatment device 40 is discharged from an exhaust pipe 41 and then discharged to the outside from a tail pipe 42.

[0027] In addition to the battery 52, the front compartment is equipped with auxiliary equipment such as a condenser 53 and a receiver-drier 54 that constitute an air conditioning system (not shown) that conditions the cabin 16. The condenser 53 functions as a condenser that cools the refrigerant and liquefies the gaseous refrigerant by exchanging heat between the refrigerant, whose temperature has been increased by being compressed by the compressor 39, and the atmosphere. The receiver-drier 54 separates the refrigerant into liquid and gas phases, thereby removing moisture from the refrigerant. The receiver-drier 54 is disposed behind the cooling water tank 67. An engine control unit (ECU) 55 is disposed between the upper frame 62U of the radiator support frame 62 and the air cleaner support portion 51. An air conditioning hose 56 connected to the compressor 39 bypasses the ECU 55 and is connected to the condenser 53 on the side opposite the receiver-drier 54.

[0028] 5, the relay 46 is provided rearward of the shroud 45 and above the outside of the aircraft. When multiple relays are provided, the relays 46 are arranged side by side in the left-right direction, and the second relay 46b provided on the outside is lower than the first relay 46a provided on the inside, which makes it easier to route the harnesses and the like.

[0029] A compressor bracket 39a provided on the right side of the cabin 16 is connected to the side of the engine E by a plate 43. A clamp 44 is attached to the plate 43 and the heater hose 58 is fixed with the clamp 44, thereby ensuring reliable routing.

[0030] The condenser 53 is located between the radiator 60 and the dustproof net 63, and by slackening the air conditioner hose 56 connected to the condenser 53 from above to below the condenser 53, the condenser 53 can be pulled out without removing a clamp or the like, improving operability during maintenance.

[0031] Next, the configuration around the front room having the air cleaner 50 and the radiator 60 will be described. The rear of the engine E is connected to the front end of the transmission case 3, while axle brackets 70 supporting axle housings 71 of the front wheels 4 are connected to the front side of the engine E to form a front frame of the vehicle, and this front frame of the vehicle forms a support frame for the radiator 60. That is, as shown in FIG. 2 and other figures, the support configuration for the radiator 60 is such that a base plate 61 is provided in an arc shape with its front end aligned with the front lower edge of the hood 2, that is, to form the bottom of the front space in front of a dustproof net 63 (described later). To the rear of the base plate 61, rigid upright members 62L, 62R, whose upper and lower portions are connected to each other, are fixed by fastening means or welding means to form a radiator support frame 62 with an open front. An upper frame 62U connects the upper portions of the upright members 62L, 62R to each other, forming a gate shape, and the upper portion of the radiator 60 is supported facing the upper frame 62U.

[0032] A dustproof net 63 is provided on the front surface of the radiator 60. This dustproof net 63 has a flat portion 63a facing the front surface of the core of the radiator 60, and handles 63b on either the left or right end that serve as both pull-out and fastening pieces. The dustproof net 63 slides left and right to be attached to the front surface of the radiator 60 or pulled out and guided.

[0033] The dustproof net 63 is provided to prevent weeds, dust, dirt, etc. from getting into the radiator 60. If foreign matter gets into the radiator, clogging occurs, and the cooling effect of the radiator 60 decreases.

[0034] When the tractor is working, the inside of the bonnet 2 is constantly vibrating due to the unevenness of the field and vibrations from the engine E. If this vibration causes the dustproof net to shift position, dust will get into the radiator 60, reducing the cooling effect. Also, if the dustproof net 63 becomes clogged, the air flow will be poor and the cooling effect will decrease, so the dustproof net 63 needs to be cleaned regularly. To make cleaning the dustproof net 63 easy when cleaning, the dustproof net 63 is designed to be freely removable.

[0035] The dustproof net 63 slides between an upper rail 64a and a lower rail 64b which are parallel to each other, and the end of the upper rail 64a on the side in the direction of removal is located more inward than the end of the lower rail 64b on the side in the direction of removal, and the lower rail 64b has a support portion 64c when attached and a lower portion 64d, so that the dustproof net 63 can slide diagonally, and therefore the dustproof net 63 can be pulled out from the rail 64 even if there is an obstacle such as an insulator in the direction of removal.

[0036] The dustproof net 63 is restricted by an upper rail 64a so as not to move upward. Furthermore, even if hoses connecting the air cleaner 50 and the engine E are routed above the radiator 60 and the dustproof net 63, these components will not come into contact with them.

[0037] Furthermore, by providing lower rail 64b with lower portion 64d, even if the difference between the positions of the ends of upper rail 64a and lower rail 64b is not large, the lower corners of dustproof net 63 can be recessed into lower portion 64d to allow for inclination, thereby making upper rail 64a longer (specifically, to a length of at least half the length of the upper end of the dustproof net).This allows the dustproof net to be configured to slide diagonally, while also allowing for stable installation with vibration suppressed when attached.

[0038] 7 as an example of an embodiment, during work, support portions 64c during installation are provided on the left and right ends of lower rail 64b, a low portion 64d is provided in the center of lower rail 64b, and the dustproof net 63 is supported by upper rail 64a whose end on the pull-out direction side is positioned more inward than the end of lower rail 64b on the pull-out direction side, thereby enabling work to be done in a stable position and preventing noise caused by flapping of the dustproof net 63. By providing support portions 64c during installation at approximately the same height on the left and right ends of lower rail 64b, the lower part of dustproof net 63 when inserted all the way can be stably supported by two support portions 64c during installation at separate locations.

[0039] By configuring the upper end of the lower portion 64d of the lower rail 64b to be higher than the lower end of the support portion 64c when attached, the forward and backward shaking of the dustproof net 63 located above the lower portion 64d when attached is suppressed, and the same effect as described above can be obtained.

[0040] By providing the inclination 64e between the mounting support portion 64c and the lower portion 64d, the dustproof net 63 can be attached and detached along the inclination 64e, and therefore can be attached and detached in a stable position.

[0041] Conventionally, rail 64 is configured to be parallel to base plate 61, so even if dust or liquid gets into lower rail 64b, it can be removed by air blowing or the like. However, in the present invention, lower rail 64b has support portion 64c during installation and low portion 64d, making it difficult to remove dust or liquid. If dust accumulates on the lower rail, the rail will not slide well, making it difficult to attach and remove the dustproof net or preventing it from being fixed in the correct position, so lower rail 64b must also be cleaned regularly.

[0042] By providing cutout 64f in lower portion 64b that communicates with the inside of the rail, dust particles and liquid can be discharged from cutout 64f during cleaning. Also, by providing cutout 64f on the front side of lower rail 64b, dust particles and the like are not discharged in the direction of radiator 60, which is located behind dustproof net 63.

[0043] As shown in Figure 7, the rail 64 may be of an attachable type. A rail attaching portion 65 is provided for attaching the lower rail 64b. The rail attaching portion 65 has a notch in the center, into which the lower portion 64b can be fitted. Conventionally, the rail 64 is welded to the radiator bracket, so the rail could not be removed even on work vehicles that do not have air conditioning, but by making the rail 64 of an attachable type, it can be attached as needed.

[0044] A rail mounting portion 65 is attached to the base plate 61 by bolts, welding, or the like, and an insulator 66 is provided on the outer periphery of the rail mounting portion 65, thereby preventing noise due to vibration.

Claims

1. A work vehicle equipped with a rectangular dustproof net in front of a radiator to prevent the passage of dust and dirt, wherein rails for fixing the dustproof net are provided on the top and bottom, and the dustproof net is configured to be slidable in the left and right directions so as to be removable, and the lower rail has a lower portion that is lower than the support portion when installed that supports the net when installed, and the end of the upper rail on the side in the removal direction is located more inward than the end of the lower rail on the side in the removal direction.

2. 2. The work vehicle according to claim 1, wherein the support portion when mounted is configured by one end and the other end provided at approximately the same height on the lower rail.

3. 3. The work vehicle according to claim 2, wherein an upper end of the lower portion of the lower rail is higher than a lower end of the support portion during installation.

4. 4. The work vehicle according to claim 3, wherein an inclined portion is provided between the mounting support portion and the lower portion.

5. 5. The work vehicle according to claim 4, wherein the lower portion has a notch.

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