Work vehicle

Abstract

To provide a work vehicle equipped with an air purification device of suctioned air without obstructing the visual field of the driver in order to solve such a problem that a conventional technique in which an air cleaner is mounted on a radiator bracket that fixes a radiator, a pre-air cleaner is mounted on the air cleaner and the pre-air cleaner protrudes upward from the upper surface of an engine hood obstructs the front visual field of a driver seated on a driver seat and becomes a distraction during the driving.SOLUTION: In a work vehicle which includes: an air cleaner 10 that purifies the air taken into an engine E; an engine hood that covers the engine E; and a radiator 6 positioned in front of the engine E to cool the engine E, a radiator bracket 30 that fixes the radiator 6 has a rectangular shape that has the longitudinal direction in the vertical direction in the front view, and the cylindrical air cleaner 10 is fixed to the front side of the radiator bracket 30 in such a posture that a cylindrical axis is in the vertical direction and is housed inside the engine hood.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a work vehicle such as a tractor. [Background technology]

[0002] There is a tractor that is equipped with an air cleaner and a pre-air cleaner to purify the intake air to the engine, with the air cleaner attached to a radiator bracket that secures the radiator, the pre-air cleaner attached above the air cleaner, and the pre-air cleaner protruding upward from the top surface of the bonnet (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6816673 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional tractors, the pre-air cleaner that protrudes upward from the hood can block the forward visibility of the driver sitting in the driver's seat, which can be a nuisance while driving.

[0005] The present invention has been made in consideration of the above, and has an object to provide a work vehicle equipped with an intake air purification device that does not obstruct the driver's view. [Means for solving the problem]

[0006] The invention described in claim 1 is a work vehicle having an air cleaner 10 that purifies the air taken into the engine E, a bonnet 5 that covers the engine E, and a radiator 6 that cools the engine E in front of the engine E, in which a radiator bracket 30 that fixes the radiator 6 is rectangular with its longitudinal direction in the vertical direction when viewed from the front, and a cylindrical air cleaner 10 is fixed to the front of the radiator bracket 30 with the axis of the cylinder in the vertical direction and stored inside the bonnet 5.

[0007] According to the invention described in claim 1, the radiator bracket 30 for fixing the radiator 6 is a rectangle having a longitudinal direction in the vertical direction when viewed from the front, and the cylindrical air cleaner 10 is fixed to the front of the radiator bracket 30 with the axis of the cylinder in the vertical direction and stored inside the bonnet 5, so that the air cleaner 10, which is an intake air purification device, can be installed without obstructing the driver's view.

[0008] The invention described in claim 2 is a work vehicle as described in claim 1, in which the left-right direction is a direction perpendicular to the up-down direction and the fore-aft direction parallel to the forward and backward movement direction of the work vehicle, a pre-air cleaner 9 that removes dust from the air drawn into the air cleaner 10 is provided on one of the left and right sides of the air cleaner 10, and the pre-air cleaner 9 is stored inside the bonnet 5.

[0009] According to the invention described in claim 2, a pre-air cleaner 9 that removes dust from the air drawn into the air cleaner 10 is provided on one of the left and right sides of the air cleaner 10, and the pre-air cleaner 9 is stored inside the bonnet 5, so that the air cleaner 10 and the pre-air cleaner 9, which are intake air purification devices, can be installed without obstructing the driver's view.

[0010] The invention described in claim 3 is a work vehicle described in either claim 1 or claim 2, in which a flexible hose 40 for transporting air to the engine E is connected to the upper part of the air cleaner 10, the air cleaner 10 is fixed to an air cleaner bracket 33 fixed to the radiator bracket 30 by a fastener 35, and a lid 10b is provided at the lower part of the air cleaner 10 which can be opened and closed freely to remove the internal filter.

[0011] According to the invention described in claim 3, a flexible hose 40 for transporting air to the engine E is connected to the upper part of the air cleaner 10, the air cleaner 10 is fixed to an air cleaner bracket 33 fixed to a radiator bracket 30 with a fixing device 35, and a lid 10b which can be opened and closed freely to remove the internal filter is provided at the lower part of the air cleaner 10. Therefore, by removing the fixing device 35 and using the elasticity of the hose 40 to pull the air cleaner 10 forward and opening the lower lid 10b, the filter can be easily removed and maintenance work can be performed on the air cleaner 10. [Brief description of the drawings]

[0012] [Figure 1] 1 is a perspective view of a tractor according to an embodiment of the present invention. FIG. [Diagram 2] FIG. 2 is a perspective view of a main portion around the air cleaner. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 4 is a front view for explaining the operation of assembling the air cleaner. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] FIG. 4 is a front view for explaining the operation of the striker. [Figure 14] FIG. 4 is a front view for explaining the operation of the striker. [Figure 15] FIG. 11 is a perspective view of a main part around an air cleaner according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, a tractor as one embodiment of a work vehicle of the present invention will be described with reference to the drawings. The left and right directions when facing the forward movement of the vehicle body are referred to as left and right, respectively, and the forward movement is referred to as front, and the backward movement is referred to as rear.

[0014] <Overall composition> As shown in FIG. 1, a tractor has a body 3 that runs on left and right front wheels 1,1 and left and right rear wheels 2,2, and is provided with a cabin 4 in which an operator sits and an engine E covered by a bonnet 5, with the cabin 4 provided with operating devices such as a driver's seat and a steering wheel.

[0015] Furthermore, on the vehicle body 3, an engine E covered by a bonnet 5, a radiator 6, an intercooler 7, a hydraulic pump, and part of a transmission case are provided.

[0016] Left and right hitches for mounting working equipment are provided at the rear of the vehicle body 3 (at the rear of the transmission case).

[0017] The left and right rear wheels 2, 2 are covered at their upper parts by a strong fender 8 that extends into the cabin 4. The rear wheels 2 are preferably made of heavy cast iron discs and are wide tires to increase traction.

[0018] As will be described in detail later, a pre-air cleaner 9 and an air cleaner 10 are provided in front of the radiator 6 and intercooler 7 inside the bonnet 5, and an exhaust pipe 11 that discharges exhaust gas from the engine E is connected to the right side of the engine E at the rear side of the bonnet 5 and stands upright.

[0019] Side doors 13, 13 with handles 12 and steps 14, 14 are provided on the left and right sides of the cabin 4, side mirrors 16, 16 are provided on the left and right above the front window 15, and work lights 17, 17 for illuminating the front are provided on the left and right above the front window 15. Reference numeral 18 is a fuel filler cap.

[0020] <Pre-air cleaner 9 and air cleaner 10> As shown in Figures 2 to 7, the radiator 6 and intercooler 7 are arranged side by side and sandwiched and fixed between the radiator bracket 30 and the shroud 31. This component is then placed from above on the axle bracket 32 ​​provided in front of the engine E of the vehicle body 3, and then slid toward the engine E and fixed in a predetermined position with bolts 39.

[0021] An air cleaner bracket 33 is fixed to the radiator bracket 30 in front of the radiator 6 and intercooler 7 with bolts 34, and the two mounting portions 10a of the air cleaner 10 are fastened to two mounting portions 33a provided on the front side of the air cleaner bracket 33 with knob bolts 35 as fasteners.

[0022] The pre-air cleaner 9 is attached to the side of the air cleaner 10 by a mounting fixture 36 .

[0023] The air cleaner 10 has a lid 10b at the bottom that can be opened and closed freely with a snap lock (fastening metal fitting) 10c so that the internal filter can be removed, and an opening 10d at the top for connecting a flexible rubber hose 40 that is connected to the intake port of the engine E.

[0024] Maintenance of the air cleaner 10 is performed by removing the knob bolt 35, pulling the air cleaner 10 to which the pre-air cleaner 9 is integrally assembled forward using the elasticity of the rubber hose 40, removing the snap lock (fastening metal fitting) 10c, and opening the lid 10b.

[0025] The radiator bracket 30, which secures the radiator 6 and intercooler 7, is rectangular with its longitudinal direction in the vertical direction when viewed from the front, and the cylindrical air cleaner 10 is fixed to the front of the radiator bracket 30 with its cylindrical axis oriented in the vertical direction, and is stored inside the bonnet 5.

[0026] Therefore, by storing the air cleaner 10 in the space in front of the radiator bracket 30, which has a longitudinal direction in the vertical direction, and storing it inside the bonnet 5, the air cleaner 10, which is an intake air purification device, can be installed without obstructing the driver's view.

[0027] A pre-air cleaner 9 that removes dust from the air taken in by the air cleaner 10 is provided on one of the left and right sides of the air cleaner 10 , and the pre-air cleaner 9 is also housed inside the bonnet 5 .

[0028] Therefore, by providing a pre-air cleaner 9 on either the left or right side of the air cleaner 10, which is fixed with the axial direction of the cylinder facing up and down, and storing it inside the bonnet 5, the air cleaner 10 and pre-air cleaner 9, which are intake air purification devices, can be installed without obstructing the driver's view.

[0029] In addition, a flexible hose 40 that transports air to the engine E is connected to the upper part of the air cleaner 10, and the air cleaner 10 is fixed with a knob bolt 35 to an air cleaner bracket 33 that is fixed to the radiator bracket 30. A lid 10b that can be opened and closed freely to remove the internal filter is provided at the lower part of the air cleaner 10.

[0030] Therefore, maintenance of the air cleaner 10 can be easily performed by removing the knob bolt 35, pulling the air cleaner 10 to which the pre-air cleaner 9 is assembled forward using the elasticity of the hose 40, removing the snap lock (fastening metal fitting) 10c, and opening the lid 10b, thereby removing the filter.

[0031] 8 to 10 are a perspective view, a side view, and a front view showing the air cleaner 10 and the pre-air cleaner 9 housed inside the bonnet 5. As shown in FIG.

[0032] 11 and 12 are perspective views of the radiator bracket 30 as viewed from the rear side, and in particular are perspective views for explaining the configuration of the shroud 31. FIG.

[0033] That is, a notch 31a is provided on the left side surface of the shroud 31 for removing the air conditioner belt 51 wound around the rear side of the radiator fan 50 in front of the engine E.

[0034] To remove the air conditioner belt 51, first, the tension pulley of the air conditioner belt 51 is deactivated to release the belt tension, the air conditioner belt 51 is removed from the drive pulley and driven pulley, passed through the radiator fan 50 and brought out in front of the radiator fan 50, and then taken out of the machine through the cutout 31a.

[0035] 13 and 14 show the operation of a striker 60, which is a locking device for the front part of the bonnet 5. FIG.

[0036] That is, the striker 60 is composed of a guide body 61 having a V-shaped guide groove 61a whose base is fixed to the bottom flat portion 30a of the radiator bracket 30, and a locking hook 63 pivotally supported on the guide body 61 by a pivot shaft 62 in the front-rear direction so as to be freely rotatable.

[0037] The locking hook 63 is fixed in place by the tension spring 64 exceeding the pivot shaft 62 in the open and locked states.

[0038] The bonnet 5 has its rear left and right sides pivoted about pivot shafts in the left and right directions, and its front part rotates vertically to open and close.

[0039] When the front part of the bonnet 5 is moved downward to close it, the front-rear lock pin provided on the inner surface of the front part of the bonnet 5 is guided by the guide groove 61a of the guide body 61 of the striker 60 and reaches the lowest end of the guide groove 61a.

[0040] As shown in FIG. 13, when the locking hook 63 is in the open state, the locking pin of the bonnet 5 presses the lower cam surface 63a of the locking hook 63 downward, causing the locking hook 63 to rotate in the direction of the arrow (A), and the locking groove 63b of the locking hook 63 presses down the locking pin at the bottom end of the guide groove 61a from above, locking the bonnet 5 in the closed state.

[0041] As shown in FIG. 14, when the locking hook 63 is in the locked state, the locking pin of the bonnet 5 pushes the upper cam surface 63c of the locking hook 63 outward, rotating the locking hook 63 in the direction of arrow (B) and retracting it from the guide groove 61a of the guide body 61, and after the locking pin reaches the bottom end of the guide groove 61a, the locking groove 63b of the locking hook 63 presses down the locking pin at the bottom end of the guide groove 61a from above, locking the bonnet 5 in the closed state.

[0042] Therefore, whether the locking hook 63 is in the open or locked state, the front part of the bonnet 5 can be lowered to close it, whereby the striker 60 can lock it in the closed state.

[0043] In order to change the locking hook 63 from the locked state to the released state, an operating wire 65 is used which is pulled by operating a separately provided opening / closing lever.

[0044] <Another embodiment>

[0045] (1) FIG. 15 shows a second embodiment of the support structure for the pre-air cleaner 9 and the air cleaner 10.

[0046] That is, the air cleaner bracket 33 is fixed to the radiator bracket 30 in front of the radiator 6 and the intercooler 7 with bolts 34, and the base of an arc-shaped retaining plate 70 made of a leaf spring is attached to two mounting portions 33a provided on the front side of the air cleaner bracket 33 by tightening the base with knob bolts 35.

[0047] To mount the air cleaner 10, with the pre-air cleaner 9 assembled to the side by the mounting fixture 36, on the front side of the air cleaner bracket 33, the air cleaner 10 is held by two arc-shaped retaining plates 70 and pressed against the air cleaner bracket 33, and the bases of the two retaining plates 70 are each fastened to two mounting portions 33a provided on the front side of the air cleaner bracket 33 by knob bolts 35.

[0048] Therefore, maintenance of the air cleaner 10 can be easily performed by removing the knob bolt 35, removing the retaining plate 70, pulling the air cleaner 10 to which the pre-air cleaner 9 is assembled forward using the elasticity of the hose 40, and removing the snap lock (fastening metal fitting) 10c to open the lid 10b, thereby removing the filter.

[0049] Incidentally, instead of the two retaining plates 70 described above, a rubber belt may be looped around the air cleaner bracket 33 and the air cleaner 10 to hold and secure the air cleaner 10 to the air cleaner bracket 33. When performing maintenance on the air cleaner 10, the rubber belt is removed and the maintenance is carried out in the same manner as described above. [Explanation of symbols]

[0050] 5. Bonnet 6. Radiator 9 Pre-air cleaner 10 Air cleaner 10b Lid 30 Radiator bracket 33 Air cleaner bracket 35 Fixture (knob bolt) 40 Horse E-Engine

Claims

1. The work vehicle is provided with an air cleaner (10) that purifies the air taken into an engine (E), a bonnet (5) that covers the engine (E), and a radiator (6) that cools the engine (E) in front of the engine (E), characterized in that a radiator bracket (30) that secures the radiator (6) is rectangular with its longitudinal direction in the vertical direction when viewed from the front, and a cylindrical air cleaner (10) is secured to the front of the radiator bracket (30) with the axis of the cylinder in the vertical direction and stored inside the bonnet (5).

2. 2. The work vehicle according to claim 1, characterized in that the direction perpendicular to the up-down direction and the fore-aft direction parallel to the direction of forward and backward travel of the work vehicle is defined as the left-right direction, a pre-air cleaner (9) that removes dust from the air taken into the air cleaner (10) is provided on one of the left and right sides of the air cleaner (10), and the pre-air cleaner (9) is stored inside the bonnet (5).

3. 3. A work vehicle as claimed in claim 1, characterized in that a flexible hose (40) for transporting air to an engine (E) is connected to an upper portion of the air cleaner (10), the air cleaner (10) is fixed by a fastener (35) to an air cleaner bracket (33) fixed to a radiator bracket (30), and a lid (10b) which can be opened and closed to remove an internal filter is provided at a lower portion of the air cleaner (10).

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