Work vehicles

Abstract

To provide a work vehicle that minimizes damage to parts. [Solution] A work vehicle comprising an engine (4), a bonnet (1) housing the engine (4), a cooler (12) erected in the internal space covered by the bonnet (1), a cooler bracket (15) supporting the cooler (12), and hoses (30, 32) routed in front of the cooler (12), with a guide member (100) at the upper end of the cooler bracket (15) to prevent the hoses (30, 32) from contacting the cooler (12), and the guide member (100) positioned between the cooler (12) and the hoses (30, 32).

Description

[Technical Field]

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

[0002] There is a tractor provided with piping near a condenser. (See, for example, Patent Document 1). [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2010-174855 [Summary of the Invention] [Problems to be Solved by the Invention]

[0004] However, the inside of the bonnet constantly vibrates when the engine is in operation, and if the hose comes into contact with a corner or a notch of the condenser bracket, there is a possibility that a hole will be formed in the hose.

[0005] In view of the above problems, an object of the present invention is to provide a work vehicle that suppresses damage to components. [Means for Solving the Problems]

[0006] Therefore, the work vehicle according to the invention comprises an engine (4), a bonnet (1) accommodating the engine (4), a cooler erected in an internal space covered by the bonnet (1), a cooler bracket (15) supporting the cooler (12), and hoses (30, 32) routed in front of the cooler (12), wherein a guide member (100) that prevents the hoses (30, 32) from coming into contact with the cooler (12) is provided at an upper end of the cooler bracket (15), and the guide member (100) is positioned between the cooler (12) and the hoses (30, 32). [Effects of the Invention]

[0007] According to the present invention, the guide member (100) provided on the cooler bracket (15) can prevent the hoses (30, 32) from coming into contact with the cooler (12) or the cooler bracket (15) and being damaged. [Brief explanation of the drawing]

[0008] [Figure 1] Side view of the tractor [Figure 2] Perspective view of the inside of the hood, seen from the front. [Figure 3] Perspective view of the inside of the hood from the side. [Figure 4] Plan view of the inside of the hood [Figure 5] Perspective view of the capacitor and capacitor bracket. [Figure 6] Perspective view showing part of the inside of the hood [Figure 7] Perspective view of the inside of the hood, seen from the front. [Figure 8A] Diagram showing the capacitor in use, viewed from the rear. [Figure 8B] Diagram showing capacitor maintenance as viewed from the rear. [Figure 9] Perspective view of a capacitor from the front. [Figure 10] Perspective view of the inside of the hood, seen from the front. [Figure 11A] Plan view of the guide member and contact prevention member in the embodiment [Figure 11B] Plan view of the guide member and contact prevention member in another embodiment [Figure 11C] Plan view of the guide member in one embodiment and the contact prevention member in another embodiment. [Figure 11D] Guide member in another embodiment and contact prevention member in another embodiment Plan view of the contact prevention member [Figure 12] Perspective view of the upward-sloping section at the rear of the cabin [Figure 13] Rear lower side view of the cabin [Figure 14]Perspective view of the cabin interior [Figure 15] Enlarged view of the guide member portion in Figure 10 MODE FOR CARRYING OUT THE INVENTION

[0009] Embodiments of the present invention are described below.

[0010] In the present embodiment, the front-rear direction refers to the traveling direction when the tractor travels straight, the front side in the traveling direction is defined as "front", and the rear side is defined as "rear". The traveling direction of the tractor, when traveling straight, is the direction from the driver's seat, which will be described later, toward a steering wheel serving as a steering device.

[0011] The left-right direction is a direction horizontally orthogonal to the front-rear direction. Hereinafter, left and right are defined with the operator facing the "front" side. That is, when a tractor operator (also referred to as a "driver") is seated in the driver's seat and faces forward, the left hand side is "left" and the right hand side is "right".

[0012] The up-down direction is the vertical direction. The front-rear direction, the left-right direction and the up-down direction are mutually orthogonal. Each direction is defined for convenience of description, and the present invention is not limited by these directions. In addition, hereinafter, the tractor may be referred to as a machine body or a vehicle body.

[0013] Figure 1 is a side view of a tractor equipped with a cabin 2, wherein a bonnet 1 is provided at the front portion of the vehicle body. An air conditioning unit 3 is mounted on the upper rear portion of the cabin 2.

[0014] The front loader is a configuration in which a loader arm with a dumpable bucket at its tip is mounted on the front of the tractor body so as to be able to be raised, lowered, and rotated. The tractor body is configured to be driven by a linkage from the engine 4 located in the front bonnet 1, with a pair of front wheels 50 and rear wheels 51 mounted on axles. The front wheels 50 are steered left and right by a steering wheel on the dashboard. A driver's seat 47 is provided in the center of the seat floor 45 at the rear of the step floor, and between this and the side fenders are operating levers for raising and lowering the loader arm, as well as other operating levers for shifting gears, etc.

[0015] A wide opening 46 is formed in the seat floor 45, and a rubber boot 49 is attached to the opening 46 to enclose the lever shaft of the operating lever 48 that protrudes upward from the transmission case 38, thereby providing the operating lever 48 which is bent backward. The outer edge of the boot 49 is made U-shaped in cross-section and fitted into the inner edge of the PTO outlet. The boot 49 is attached to the seat floor 45 via a trim or insulator made of resin or other material to conform to the shape of the opening 46 as a dustproof member, thereby preventing mud, water and dust from entering from below and improving dustproof performance. In addition, the trim or insulator surrounding the boot mounting area prevents wear and tear on the edge of the boot 49, reducing deterioration of the boot 49. This extends the lifespan of the boot 49 and makes it easier to maintain its function.

[0016] Next, the interior of the hood 1 will be explained with reference to Figures 2 to 10.

[0017] Inside the hood 1 are the engine 4, a DPF 5 that removes soot from harmful gases emitted from the engine 4, an air cleaner 6 that removes foreign matter when air is taken in to supply the engine 4, an intercooler 7 that cools the compressed air supplied to the engine 4, a radiator 8 that cools the coolant supplied to the engine 4, a reserve tank 9, a battery 10, a compressor 11 that compresses the refrigerant sent from the air conditioning unit 3, a condenser 12 that cools the refrigerant compressed by the compressor 11 into a liquid, and a receiver dryer 13 that stores the refrigerant sent from the condenser 12 and removes moisture from the refrigerant.

[0018] Let's explain the layout inside the hood 1.

[0019] A mounting platform 19 is provided at the front of the vehicle body. A battery 10 and a reserve tank 9 are mounted side-by-side at the front of the mounting platform 19. A receiver dryer 13 and a condenser 12 are mounted side-by-side behind the battery 10 and the reserve tank 9. The receiver dryer 13 and the condenser 12 are connected. An intercooler 7 is provided behind the receiver dryer 13 and the condenser 12, and a radiator 8 is provided behind the intercooler 7. An air cleaner 6 is provided above the condenser 12 and the battery 10.

[0020] The battery 10, condenser 12, intercooler 7, radiator 8, and air cleaner 6 are mounted in a position where their longest sides are aligned with the left-right direction of the vehicle body.

[0021] A radiator net is provided between the radiator 8 and the intercooler 7. The front of the radiator 8 is supported by a front radiator bracket 34, and the rear of the radiator 8 is supported by a rear radiator bracket 35. A piping bracket 17, which will be described later, is provided on the upper part of the rear radiator bracket 35, and a through hole is formed in the piping bracket 17 for the piping to pass through. The radiator fan 36 (Figure 3) is installed in a radiator fan guide 37 at the rear of the radiator 8. The front radiator bracket 34 is bent at both the left and right ends toward the front, and is configured to cover both the left and right sides of the intercooler 7.

[0022] An engine 4 is located behind the radiator 8, a DPF 5 is located above the rear of the engine 4, and a compressor 11 is located above the front of the engine 4.

[0023] When mounting the engine 4 inside the hood 1, the engine 4 is suspended, and it can be easily mounted by hooking it onto a hanger plate 14 provided on the engine 4. By positioning the compressor 11 near the holes in the hanger plate 14 via a compressor bracket 16 on the engine 4, the holes in the hanger plate 14 can be used when assembling the compressor 11, and bolts and other fasteners can be easily fastened from the rear of the compressor 11 using a tool.

[0024] Next, we will explain how to attach and detach the capacitor 12, receiver dryer 13, and compressor 11.

[0025] The receiver dryer 13 is integrated with the condenser 12, and the condenser bracket 15 serves as a cooling bracket to support the condenser 12. These components are erected in front of the radiator 8. The condenser 12, receiver dryer 13, and condenser bracket 15 are designed to be retractable by sliding to one side.

[0026] The condenser 12 was connected to a hose through which air conditioning gas flowed, and it was not possible to remove the condenser 12 from the hood 1 without draining the gas. However, draining the gas required the use of a special tool, so it was necessary to stabilize the position of the condenser 12 so that it could be pulled out from inside the hood 1 without disconnecting the hose.

[0027] Left and right capacitor brackets 15L and 15R are provided at both ends of the capacitor 12. A locking member 21 is attached to the right capacitor bracket 15R so as to protrude toward the capacitor frame 20.

[0028] When the capacitor 12 is pulled out, the locking member 21 can be hooked onto the capacitor frame 20, making it easy to fix the position of the capacitor 12. Fixing the position of the capacitor 12 stabilizes its posture, and during maintenance, the entire capacitor 12 can be pulled out without removing the hose, while the position of the capacitor 12 is maintained by the locking member 21, making maintenance easy.

[0029] Furthermore, when installing the capacitor 12, the position of the capacitor 12 can be easily determined by pushing the capacitor 12 in until the locking member 21 contacts the capacitor frame 20.

[0030] As shown in Figure 10, a pipe-shaped capacitor bracket connecting member 102 connecting the left and right capacitor brackets 15L and 15R is provided so as to be located in front of the capacitor and below the center. This capacitor bracket connecting member can be used as a handle when pulling out the capacitor 12 and also improves the rigidity of the left and right capacitor brackets 15L and 15R. Furthermore, after installation, it prevents the hose from coming into contact with the capacitor 12 and suppresses hose damage.

[0031] Next, I will explain the piping.

[0032] A first hose 26 is provided through which outside air that has passed through the air cleaner 6 passes. The first hose 26 is connected to the turbocharger 27, the turbocharger 27 is connected to the intercooler 7 by a second hose 28, and a third hose 29 is provided to connect the intercooler 7 to the engine 4.

[0033] As shown in Figure 4, the compressor 11 and the condenser 12 are connected by a fourth hose 30, and a sixth hose 32 extends from the condenser 12 towards the air conditioning unit 3.

[0034] The compressor 11 of the engine E auxiliary equipment and the condenser 12 located in front of the radiator 8 are connected by a fourth hose 30, and the receiver dryer 13 located in front of the radiator 8 and the air conditioning unit 3 are connected by a sixth hose 32. A piping bracket 17 is formed to stably hold these fourth hose 30 and sixth hose 32.

[0035] The piping bracket 17 is fixed via the bracket of the radiator 8, and the fourth hose 30 and the sixth hose 32 are bolted to the piping bracket 17 using rubber clamps or wire bands.

[0036] On one side of the vehicle body, the first hose 26 and the second hose 28 are arranged side by side in adjacent positions, and the third hose 29 is positioned on the other side. The fourth hose 30 and the sixth hose 32 are positioned in the middle section between the left and right sides. The first hose 26, the second hose 28, the third hose 29, the fourth hose 30, and the sixth hose 32 are supported by passing through the piping bracket 17 and also pass above the radiator 8.

[0037] The condenser 12 and the compressor 11 are connected by a suction pipe 31. A fourth hose 30 is routed above the compressor 11, and routing is made easier by inserting the fourth hose into the compressor bracket 16 and securing it with a band 16a. In addition, the compressor 11 is equipped with a harness for electrically operating the clutch, and routing can be ensured by fixing the harness 33 to the compressor bracket 16 below the fourth hose 30.

[0038] This configuration allows each hose to be centrally positioned and supported by the piping bracket 17.

[0039] A guide member 100 is provided at the upper end of the capacitor bracket 15. The guide member 100 prevents the hoses 30 and 32 located in front of the capacitor 12 from coming into contact with the capacitor 12 or the receiver dryer 13 and being damaged.

[0040] The capacitor 12 is extendable in the direction of the receiver dryer 13, and the guide member 100 is installed above the receiver dryer 13, positioned between the capacitor 12 and the hoses 30 and 32.

[0041] The guide member 100 is a round bar and has an outer end 100a, a first intermediate portion 100b extending from the outer end 100a, an inner end 100d that bends toward the front or rear of the aircraft, and a second intermediate portion 100c connecting the first intermediate portion 100b and the inner end 100d.

[0042] The outer end portion 100a is attached to the upper end of the condenser bracket 15 so as to protrude toward the front of the aircraft.

[0043] The first intermediate section 100b is curved in a U-shape toward the front. The curved section is located outward from the hoses 30 and 32, which prevents the hoses 30 and 32 from flying outward inside the vibrating bonnet 1 during operation.

[0044] The second intermediate section 100c has a linear shape in the left-right direction and is positioned between the hoses 30 and 32 and the condenser 12, facing diagonally with respect to the vertical direction. The hoses 30 and 32 come into contact with the second intermediate section 100c, which suppresses vibration of the hoses 30 and 32, which are routed from above the radiator front bracket 34 to the front of the condenser 12 and connected to the condenser 12, while in contact with the condenser 12 or condenser bracket 15 during operation.

[0045] If the inner end 100d is bent toward the front of the aircraft, it prevents the hoses 30 and 32 from sticking out, and when the condenser 12 is pulled out, the hoses 30 and 32 catch on the inner end 100d, so that even when the condenser 12 is pulled out, the hoses 30 and 32 do not come off the guide member.

[0046] In another embodiment, if the inner end 100d is bent toward the rear of the aircraft, the hoses 30 and 32 can move to the appropriate position without interfering with the guide member 100 when retracting the condenser 12 from an extended state.

[0047] As described above, by securing the hoses 30 and 32 with the guide member 100, it is prevented that the hoses 30 and 32 will come into contact with the capacitor 12 or the capacitor bracket 15 and be damaged.

[0048] Furthermore, since the receiver dryer 13, which is erected on the condenser bracket 15, is made of aluminum, vibrations generated during work or maintenance may cause it to come into contact with the hoses 30 and 32, leading to wear and potentially damage such as holes forming. However, by providing the guide member 100, the first intermediate section 100b can secure the hoses 30 and 32, preventing them from coming into contact with the receiver dryer 13.

[0049] Furthermore, to enhance the effect of suppressing contact with the receiver dryer 13, a contact prevention member 101 may be provided.

[0050] As shown in Figures 11A and 11B, the contact prevention member 101 is attached to the right-side condenser bracket 15R so as to be located below the guide member 100, and forms a guardrail in a semicircular shape that surrounds the receiver dryer 13. The contact suppression effect can be enhanced by making the length long enough to cover at least two-thirds of the receiver dryer 13 from its upper end to its lower end.

[0051] Alternatively, as shown in Figures 11C and 11D, in another embodiment, a round bar is arranged in a semicircular shape to surround the receiver dryer 13 near its center. The round bar has a curved portion 101a that curves forward from the connection point of the right capacitor bracket 15R, and a straight portion 101b that extends linearly in the left-right direction. The curved portion 101a prevents the hoses 30 and 32 from coming into contact with the receiver dryer 13, and the straight portion 101b prevents the hoses from coming into contact with the capacitor 12.

[0052] The front end of the contact prevention member 101 is located in front of the front end of the guide member 100, so that it can cover the receiver dryer 13 which is discharged in front of the capacitor 12.

[0053] Furthermore, the capacitor 12 may expand due to heat, and when attaching the capacitor bracket 15, it is attached via an elastic material 23 such as rubber. When storing the capacitor 12 from the extended position, it is stored by pressing the right-side capacitor bracket 15R, and at that time the right-side capacitor bracket 15R wobbles slightly due to the elastic material 23, so the guide member 100 connected to the right-side capacitor bracket 15R also wobbles, making it easier to insert the hoses 30 and 32 when storing the capacitor 12.

[0054] The installation of Liquid Eye 24 will be explained using Figure 9.

[0055] As the refrigerant for air conditioners circulates through the refrigerant circulation path, it repeatedly vaporizes due to adiabatic expansion and liquefies due to compression. However, because the refrigerant circulation path is not completely sealed, it is unavoidable that the refrigerant will gradually leak out of the path as it circulates repeatedly. Therefore, a liquid eye 24, which allows visibility into the inside of the circulation path, is installed in the middle of the refrigerant circulation path of the air conditioner, allowing for visual confirmation of whether or not the refrigerant is leaking by observing the formation of bubbles.

[0056] In this embodiment, the sixth hose 32 connected to the air conditioning unit 3 is connected to the condenser 12 via a liquid valve 25 fixed to the lower end of the condenser bracket 15.

[0057] A liquid eye 24 is installed at the connection point between the liquid valve 25 and the sixth hose 32. The liquid eye 24 is positioned so that it is oblique to the vertical. In this way, the amount of refrigerant gas can be easily checked with the liquid eye 24 without being obstructed by the air cleaner 6 or battery 10 which are located in front of the liquid eye 24.

[0058] Next, the configuration of the rear of the cabin will be explained using Figures 12 and 13.

[0059] A rear window 41 is provided at the rear of the cabin 2, with its upper part acting as a pivot point and its lower part being openable and closable. Below the rear window 41, a rear under-glass 42 is provided in a forward-sloping position.

[0060] The washer tank 40 is mounted in the space opposite the outside of the rear underglass 42. The washer tank 40 is mounted on a washer tank mounting base 43 attached to the side of the fender 52, and the washer tank 40 can be attached and detached using mounting bolts 44.

[0061] Temperature and load fluctuations inside the transmission case 38 can cause pressure to build up inside the transmission case 38. To release this pressure or to draw in outside air, a breather hose 55 is connected to the transmission case 38. The breather hose 55 properly regulates the pressure, allowing the internal components of the transmission to function correctly and preventing malfunctions or leaks due to excessive pressure.

[0062] The fender 52, located above the rear wheel 51, is provided with a hole 53 for routing hoses connected to the washer tank 40. A pipe 54 is also provided to reinforce the fender 52. The pipe 54 has an L-shaped structure, so that if rainwater enters the pipe 54, the water can be discharged downwards. A breather hose 55 is extended upward from the transmission case 38, passing through the hole 53 in the fender 52, and its upper end is connected to the top of the pipe 54. This connection allows for air to be released and taken in without rainwater entering the pipe 54 entering the breather hose 55.

[0063] Because the transmission case 38 is filled with oil, the air released from the breather hose 55 contains an oily odor. In the conventional configuration, the breather hose 55 was routed inside the cabin frame 39, causing oil vapor to leak into the cabin 2, resulting in an oily odor clinging to the cabin 2. To address this problem, the routing method described above eliminates the need to route the breather hose 55 inside the cabin frame 39, preventing the oily odor released from the breather hose 55 from leaking into the cabin 2. [Explanation of Symbols]

[0064] 1. Hood 12. Condenser (cooler) 15. Capacitor bracket (cooler bracket) 100 Guide member 100a Outer end 100b 1st intermediate part 100c 2nd intermediate part 100d Inner edge 101 Contact prevention member

Claims

1. The engine and The hood housing the aforementioned engine, A cooler is erected in the internal space covered by the aforementioned hood, A cooling bracket that supports the aforementioned cooling unit, The cooler is equipped with a hose routed in front of it, The upper end of the cooler bracket is provided with a guide member to prevent the hose from coming into contact with the cooler. The work vehicle is characterized in that the guide member is located between the cooler and the hose.

2. The work vehicle according to claim 1, characterized in that the guide member has a first intermediate portion that curves forward between the cooler bracket and the hose and is positioned on the outside of the hose.

3. A receiver dryer is erected on one of the left or right sides of the aforementioned cooler bracket. The cooler unit and the cooler bracket are extendable in the direction in which the receiver dryer is located. The work vehicle according to claim 2, wherein the guide member is provided on the cooler bracket on the receiver dryer side, and has an inner end that bends forward on both the left and right sides inward from the hose, and a second intermediate part that connects the first intermediate part and the inner end, and the second intermediate part is positioned between the hose and the cooler.

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