Work vehicle

Abstract

To provide a work vehicle which enables easy maintenance of a dust-proof net and a periphery of the dust-proof net.SOLUTION: In a work vehicle including a dust-proof net 63 which prevents passage of dust in a front part of a radiator 60, a base plate 61 is provided so as to form a bottom part of a front space, which is located at the front relative to the dust-proof net 63, of an engine hood 2 internal space. A seal material 65 configured to fill a gap is provided at a position where the base plate 61 and a lower part of a front part of the engine hood 2 contact. The dust-proof net 63 may be slid in a lateral direction to be pulled out. An extension line in a slide direction of a lower end of the dust-proof net 63 is located above the seal material 65.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a work vehicle such as an agricultural tractor.

Background Art

[0002] There is known a work vehicle having a dust-proof net that prevents dust from passing through in front of a radiator to prevent blockage of the radiator, and an air cleaner that removes dust from the air supplied to the engine is mounted in front of the dust-proof net (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] According to the configuration described in Patent Document 1, when dust adheres to or accumulates on the air cleaner or the dust-proof net, maintenance can be performed to remove the dust. However, if a large amount of dust enters the internal space of the bonnet, it becomes easy to get dirty, so maintenance must be performed frequently, and further improvement is required for the removal and installation of the dust-proof net.

[0005] An object of the present invention is to provide a work vehicle in which maintenance of a dust-proof net and its periphery is easy.

Means for Solving the Problems

[0006] In order to solve the above problems and achieve the object, the invention according to claim 1 is a work vehicle provided with a dust-proof net 63 for preventing the passage of dust at the front part of a radiator 60. A base plate 61 is provided to form the bottom of the front space in the internal space of the bonnet 2, which is in front of the dust-proof net 63. A sealing material 65 for filling a gap is provided at a position where the base plate 61 contacts the lower part of the front of the bonnet 2. The dust-proof net 63 is configured to be slidable in the left-right direction and removable, and the extension line of the sliding direction of the lower end of the dust-proof net 63 is configured to be located above the sealing material 65.

[0007] The invention according to claim 2 is configured such that the extension line of the rail 64b for sliding the lower end of the dust-proof net 63 is located above the sealing material 65 in the invention according to claim 1.

Effect of the Invention

[0008] According to the invention described in claim 1, there is no risk that the lower edge of the dust-proof net 63 contacts the sealing material 65, and maintenance by pulling out the dust-proof net 63 can be easily performed.

[0009] According to the invention described in claim 2, in addition to the effect described in claim 1, the dust-proof net 63 can be easily maintained by being configured to be slidable along the rail 64b and removable.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0012] FIG. 1 shows a tractor. A diesel engine E is mounted inside a bonnet 2 at the front part of a traveling vehicle body 1. The rotational power of this engine E is transmitted to a transmission in a transmission case 3, and the rotational power decelerated by this transmission is transmitted to front wheels 4 and rear wheels 5. A steering wheel 6 for steering the front wheels 4 is equipped behind the engine E, and further, a driver's seat 7 is installed behind it. An oil hydraulic cylinder case 8 is provided at the rear upper part of the transmission case 3, and lift arms 9 constituting a part of a hydraulic lifting mechanism are rotatably attached to both left and right sides of this cylinder case 8. The lift arms 9 move up and down by the telescopic operation of a lift hydraulic cylinder 10. At the rear part of the vehicle body, a three-point link mechanism composed of a top link 11 and left and right lower links 12 is provided, a rotary working machine R is attached to the link mechanism, and the lower link 12 is connected to the lift arm 9 via a lift rod 13, thereby configuring the working machine R to be able to be lifted and lowered.

[0013] The steering wheel 6, the 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 anti-vibration rubber, making it difficult for the vibration of the vehicle body to be transmitted to the cabin 16.

[0014] The cab 16 is of a frame structure integrated by a floor 17, front columns 18 erected on the left and right front parts of the floor 17, rear columns 19 erected on the left and right at the rear of the driver's seat 7, intermediate columns 20 erected in the middle part between the front and rear, and an upper frame 21 connecting the upper ends of these columns, and is covered by a roof 22. And a box-shaped seat frame 23 that supports the driver's seat 7, a rear plate 24 that surrounds the rear surface of the driver's seat 7, left and right fenders 25 that cover the upper part of the rear wheels 5, etc. are rigidified to ensure strength. Further, glass window parts are formed on the front and rear side surfaces and can be lifted and lowered from the left and right opening and closing door parts 26.

[0015] For the engine E, for example, a diesel engine is used. As shown in FIG. 2 and the like, for this engine E, a cylinder head 32 and the like are provided on the upper part of a cylinder block 31, and an oil pan 34 is provided on the lower part of the cylinder block 31. Also, for the engine E, a cooling fan 35 and the like are provided on the front part of the cylinder block 31, and a flywheel 36 and the like connected to the crankshaft are provided on the lower rear part of the cylinder block 31.

[0016] The cylinder block 31 is provided with a plurality of cylinders arranged such that a plurality of pistons coupled to a crankshaft (not shown) reciprocate inside. The cooling fan 35 rotates by a fan belt 38 that is wound around related components such as a pulley connected to the crankshaft, an alternator 37, and a compressor 39 and is rotated.

[0017] And in this tractor, as shown in FIG. 2 and the like, an exhaust gas treatment device 40 is installed at the upper rear part of the engine E.

[0018] The exhaust gas treatment device 40 is a device that purifies the exhaust gas exhausted from the engine E composed of a diesel engine. For example, a device with a structure in which an oxidation catalyst (DOC) and a diesel particulate filter (DPF) are connected in series inside a cylindrical container (not shown) and the exhaust gas is passed through is used. The DOC performs a process of oxidizing harmful components in the exhaust gas to make them harmless. The DPF performs a process of collecting particulate matter contained in the exhaust gas.

[0019] In the exhaust gas treatment device 40 in the present embodiment, the exhaust gas discharged through an exhaust manifold (not shown) of the engine E is taken in. Further, the exhaust gas treated by the exhaust gas treatment device 40 is discharged from the exhaust pipe 41 and discharged outside from the tail pipe 42.

[0020] Next, the front room having the air cleaner 50 and the configuration around the radiator 60 will be described.

[0021] The rear part of the engine E is connected to the front end of the transmission case 3, while on the front side of the engine E, an axle bracket 70 that supports the axle housing 71 of the front wheel 4 is connected to form the front body frame, and a support frame for the radiator 60 is formed on this front body frame. That is, as shown in FIGS. 2, 4, etc., regarding the support configuration of the radiator 60, a base plate 61 is provided along the front lower end edge of the bonnet 2 in an arc shape, that is, to form the bottom of the front space in front of the dust-proof net 63 described later. At the rear part, upright members 62L and 62R that are rigidified by connecting the upper and lower parts left and right are fixed by fastening means or welding means to form a radiator support frame 62 with an open front surface. An upper frame 62U that connects the upper parts of the upright members 62L and 62R left and right is formed in a portal shape, and the upper part of the radiator 60 is supported in opposition to this upper frame 62U.

[0022] A dust-proof net 63 is provided on the front surface of the radiator 60. This dust-proof net 63 includes a flat portion 63a facing the front surface of the core of the radiator 60, and a handle 63b that also serves as a pulling-out and fastening fixing piece on one end side of the left and right. The dust-proof net 63 is slid in the left-right direction to be attached to or guided for pulling out from the front surface of the radiator 60. The guiding direction is configured as a rail 64 that guides the pulling-out side in a high-inclination direction. That is, the dust-proof net 63 is slid between an upper rail 64a and a lower rail 64b that are parallel to each other. Both the upper and lower rails 64a and 64b are set such that the back side of the pulling-out (left side in the example of FIG. 5) is low and the pulling-out side (right side in the same figure) is high, so that the dust-proof net 63 can slide in an oblique direction.

[0023] A sealing material 65 that can contact the lower surface of the closed bonnet 2 is provided on the upper surface arc-shaped periphery of the base plate 61. The extension line L of the pulling-out direction of the lower rail 64b is located above the sealing material 65 (FIG. 5(A)). Therefore, the lower edge of the dust-proof net 63 is configured to be located above the sealing material 65 even by sliding movement (FIG. 5(B)). Therefore, there is no risk that the lower edge of the dust-proof net 63 contacts the sealing material 65, and maintenance by pulling out the dust-proof net 63 can be easily performed.

[0024] In the above embodiment, the extension line of the lower rail 64b on the side where the dust-proof net 63 is pulled out is set above the sealing material 65. In addition to the configuration of pulling out in an oblique direction, by shortening the guiding length by the upper rail 64a' to a predetermined length even when sliding in the horizontal direction (FIG. 6), the dust-proof net 63 that has come off the short rail 64a can be moved obliquely upward to avoid interference with the sealing material 65, and the dust-proof net 63 can be pulled out and conversely attached without interference. Similarly to the above, the extension line of the sliding direction of the lower end of the dust-proof net 63 is located above the sealing material 65, and the same effect as described above can be obtained.

[0025] Also, various cables 66 can be arranged by utilizing the space formed below the extension line of the lower rail 64b inside the sealing material 65.

[0026] In the front room inside the bonnet 2, an air cleaner support portion 51 is formed in front of the upper part of the radiator support frame 62, and the air cleaner 50 is disposed. Note that an intake cylinder 50a and a supply cylinder 50b are connected. Further, a support plate 67a is erected on one side (the right side in the illustrated example) of the base plate 61, which is opposite to the pulling-out direction of the dust-proof net 63, and a cooling water tank 67 communicating with the radiator 60 tank is fixed so as to be vertically inserted and removed freely.

[0027] In addition to the battery 52, auxiliary machines such as a capacitor 53 and a receiver drier 54 that constitute an air conditioner (not shown) for air-conditioning the cabin 16 are arranged in the front room. Among these, the capacitor 53 is provided as a condenser that cools the refrigerant and liquefies the gaseous refrigerant by performing heat exchange between the refrigerant whose temperature has risen by being compressed by the compressor 47 and the atmosphere. Further, the receiver drier 54 can separate the liquid and gas in the refrigerant and remove the moisture in the refrigerant. This receiver drier 54 is disposed at the rear part of the cooling water tank 67. Further, an engine control unit (ECU) 55 is arranged across the upper frame 62U of the radiator support frame 62 and the air cleaner support portion 51. And the air-conditioning hose 56 connected to the compressor 47 is connected to the capacitor 53 on the side opposite to the side where the receiver drier 54 is arranged, bypassing the ECU 55.

Explanation of Signs

[0028] 2 Bonnet 60 Radiator 61 Base plate 63 Dust-proof net 64b Lower rail (rail) 65 Sealing material L Extension cord

Claims

1. In a work vehicle equipped with a dust-proof net (63) that prevents dust from passing through the front of a radiator (60), a base plate (61) is provided to form the bottom of the front space in the internal space of the bonnet (2) that is in front of the dust-proof net (63). A sealing material (65) is provided at the position where the base plate (61) contacts the lower part of the front of the bonnet (2) to fill the gap. The dust-proof net (63) is configured to be slidable in the left-right direction and removable by pulling. The work vehicle is characterized in that the extension line in the sliding direction of the lower end of the dust-proof net (63) is positioned above the sealing material (65).

2. The work vehicle according to claim 1, wherein the extension line (L) of the rail (64b) for sliding the lower end of the dust-proof net (63) is positioned above the sealing material (65).

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