Tractor

Abstract

To easily perform maintenance work of a battery while shortening a length in a vehicle body longitudinal direction of an engine room in a tractor in which a reducing agent tank is provided on a vehicle body forward side of a radiator in the engine room together with the battery.SOLUTION: A tractor includes: a radiator provided on a vehicle body forward side of an engine in an engine room 15 and cooling the engine; an exhaust emission control device for purifying exhaust gas discharged from the engine by using a reducing agent; and a reducing agent tank 21 for storing the reducing agent to be supplied to the exhaust emission control device. The reducing agent tank 21 is provided side by side with the battery 23 in a vehicle body width direction on the vehicle body forward side of the radiator in the engine room 15.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a tractor. [Background technology]

[0002] Some tractors are equipped with a radiator that is located in the engine compartment further forward of the engine and cools the engine, an exhaust gas purification device that purifies the exhaust gas emitted by the engine using a reducing agent, and a reducing agent tank that stores the reducing agent to be supplied to the exhaust gas purification device. In some tractors of this type, the reducing agent tank (urea water tank) is provided in the engine compartment further forward on the vehicle body than the radiator, as shown in Patent Document 1, for example. By providing the reducing agent tank in the engine compartment further forward on the vehicle body than the radiator, the radiator acts as a heat insulating wall located between the engine and the reducing agent tank, and the transfer of heat from the engine to the reducing agent tank is suppressed by the radiator, making it possible to prevent the reducing agent in the reducing agent tank from deteriorating due to temperature rise. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-45234 Summary of the Invention [Problem to be solved by the invention]

[0004] When the conventional technology is applied, the reducing agent tank is located above the battery, so when performing maintenance work on the battery, it is time-consuming to remove the reducing agent tank.

[0005] To provide a tractor in which a reducing agent tank is provided together with a battery in an engine room further forward of a radiator in the vehicle body, and battery maintenance work can be easily performed while shortening the length of the engine room in the front-rear direction of the vehicle body. [Means for solving the problem]

[0006] A tractor according to the present invention includes a radiator that is provided in an engine room further forward of the engine and cools the engine, an exhaust gas purification device that purifies exhaust gas emitted by the engine with a reducing agent, and a reducing agent tank that stores reducing agent to be supplied to the exhaust gas purification device, and the reducing agent tank is provided in the engine room further forward of the radiator and alongside the battery along the width direction of the vehicle body. A support plate is provided that is disposed above the vehicle body frame and supports the battery mounting base, the support plate having an opening, and the lower part of the reducing agent tank extends below the support plate through the opening. In addition, the tractor according to the present invention is provided with a radiator that is located in the engine room further forward of the engine and that cools the engine, an exhaust gas purification device that purifies the exhaust gas emitted by the engine using a reducing agent, and a reducing agent tank that stores the reducing agent to be supplied to the exhaust gas purification device, and the reducing agent tank is located in the engine room further forward of the radiator and side-by-side with the battery.

[0007] With this configuration, the reducing agent tank and battery are positioned side by side, which reduces the space required for installing them compared to when they are positioned front to back. Since battery maintenance work can be performed even when the reducing agent tank is left to the side of the battery, battery maintenance work can be easily performed even when the reducing agent tank and battery are located further forward on the vehicle body than the radiator in the engine compartment, while keeping the engine compartment short.

[0008] In the present invention, It is preferable that a reducing agent pump that supplies reducing agent from the reducing agent tank to the exhaust gas purification device be provided next to the battery and alongside the reducing agent tank.

[0009] With this configuration, the reducing agent tank and reducing agent pump are positioned side by side, which reduces the space required to install them compared to when they are positioned front to back.When performing maintenance work on the reducing agent tank, the maintenance work on the reducing agent pump can be performed to the side of the reducing agent tank, which makes it easy to perform maintenance work on the reducing agent pump at the same time as maintaining the reducing agent tank while keeping the engine compartment short.

[0010] In the present invention, it is preferable that the battery is provided with its longitudinal direction facing the front and rear of the vehicle body.

[0011] According to this configuration, compared to when the longitudinal direction of the battery is oriented laterally to the vehicle body, a larger installation space for the reducing agent tank can be obtained laterally to the vehicle body of the battery, making it easier to install the reducing agent tank.

[0012] In the present invention, It is preferable that a support plate is provided above the vehicle body frame to support the battery mounting base, the lower part of the reducing agent tank extends downward beyond the support plate, and a notch is provided at the lower corner of the reducing agent tank.

[0013] With this configuration, the lower part of the reducing agent tank extends downward beyond the support plate, so the capacity of the reducing agent tank can be increased while making it easier to secure space for arranging the reducing agent tank and battery side by side, compared to increasing the width of the reducing agent tank. The cutout prevents the capacity of the lower part of the reducing agent tank from increasing too much, so the storage amount can be measured without hindrance using a float-type sensor or other such sensor.

[0014] In the present invention, it is preferable that a reducing agent pump for supplying reducing agent from the reducing agent tank to the exhaust gas purification device be provided between the battery and the reducing agent tank.

[0015] According to this configuration, the load of the reducing agent pump is applied between the battery and the reducing agent tank, so the reducing agent pump can be installed without causing the weight in the width direction of the vehicle body to collapse or collapse significantly due to the load of the reducing agent pump.

[0016] In the present invention, it is preferable that a hose be extended from the reducing agent pump below the battery toward a lateral side of the vehicle body.

[0017] According to this configuration, the hose extending from the reducing agent tank toward the side of the vehicle body does not need to be routed around the battery toward the front or rear of the vehicle body, so the hose does not need to be bent too much.

[0018] In the present invention, It is preferable that a pump support member is provided between the battery and the reducing agent pump, and that the reducing agent pump is connected to and supports the reducing agent pump; a fixing member is provided that is abutted against the upper surface of the battery and presses the battery against the mounting base to fix it; and the pump support member is provided with a support portion that supports one end of the fixing member.

[0019] According to this configuration, the fixing member presses and fixes the battery to the mounting base while being firmly supported by a highly rigid pump support member that supports the reducing agent pump, so that the pump support member can be utilized as the support member for the fixing member, thereby enabling the battery to be firmly fixed to the mounting base while achieving a simple support structure for the fixing member. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 2 is a left side view showing the entire tractor. [Figure 2] FIG. 2 is a front view showing the reducing agent tank, the reducing agent pump, and the battery. [Figure 3] FIG. 2 is a plan view showing the reducing agent tank, the reducing agent pump, and the battery. [Figure 4] FIG. 4 is a front view showing the arrangement of hoses connected to a reducing agent pump. [Figure 5]FIG. 4 is a left side view showing a cross section of the reducing agent tank and the support plate. [Figure 6] FIG. 4 is a right side view showing the pump support member. [Figure 7] FIG. 10 is a right side view showing the second support member. DETAILED DESCRIPTION OF THE INVENTION

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the accompanying drawings. In the following description, with respect to the tractor's running body, the direction of arrow F shown in Figure 1 is referred to as the "front of the body," the direction of arrow B is referred to as the "rear of the body," the direction of arrow U is referred to as the "upper side of the body," the direction of arrow D is referred to as the "lower side of the body," the direction towards the front of the page is referred to as the "left side of the body," and the direction towards the back of the page is referred to as the "right side of the body."

[0022] [Overall configuration of the tractor] As shown in FIG. 1, a tractor has a traveling body 3 supported by a pair of steerable and drivable front wheels 1 and a pair of drivable rear wheels 2. The traveling body 3 has a body frame 4 made up of an engine 5, a flywheel housing 6 connected to the rear of the engine 5, a clutch housing 7 connected to the rear of the flywheel housing 6, a transmission case 7a connected to the rear of the clutch housing 7, and a front frame 8 connected to the bottom of the engine 5. A driving unit 9 equipped with the engine 5 is formed at the front of the traveling body 3. A driver's seat 10 and a driver's unit 12 equipped with a steering wheel 11 for steering the front wheels 1 are formed at the rear of the traveling body 3. A link mechanism 13 that connects a work implement such as a rotary tiller (not shown) so that it can be raised and lowered, and a power takeoff shaft 14 that extracts power from the engine 5 and outputs it to the connected work implement are provided at the rear of the transmission case 7a.

[0023] [Configuration of the driving unit] 1, the power plant 9 is provided with an engine room 15. The engine room 15 is formed by an engine bonnet 16 that covers the engine room 15 from above and from the front, etc.

[0024] As shown in FIG. 1, the engine room 15 is provided with an engine 5, a radiator 17 for cooling the engine 5, a first exhaust gas purification device (DPF) 18 for purifying the exhaust gas emitted by the engine 5, and a second exhaust gas purification device (SCR) 19.

[0025] [Radiator configuration] As shown in Fig. 1, radiator 17 is provided on the vehicle body forward of engine 5. Cooling air is introduced from the outside of engine compartment 15 to the inside by the blowing action of rotary fan 20 located between radiator 17 and engine 5 and supplied to radiator 17. In radiator 17, engine coolant is cooled by heat exchange between the supplied cooling air and engine coolant, and the cooled engine coolant is supplied to engine 5, thereby cooling engine 5.

[0026] [Configuration of exhaust gas purification device] The engine 5 is a diesel engine. As shown in Fig. 1, the first exhaust gas purification device 18 is provided above the engine 5. In the first exhaust gas purification device 18, exhaust gas emitted by the engine 5 is drawn into the device, and diesel particulates contained in the drawn exhaust gas are collected by a collection filter (not shown), and a purification process of the exhaust gas is performed to reduce the diesel particulates.

[0027] As shown in FIG. 1, the second exhaust gas purification device 19 is provided behind the engine 5. In the second exhaust gas purification device 19, the exhaust gas discharged from the first exhaust gas purification device 18 is introduced into the device, and the introduced exhaust gas is purified using a reducing agent. More specifically, urea water as a reducing agent is injected into the introduced exhaust gas and hydrolyzed, thereby purifying the exhaust gas by reducing nitrogen oxides contained in the exhaust gas. The purified exhaust gas is discharged from an exhaust pipe (not shown) connected to the second exhaust gas purification device 19.

[0028] [Configuration of reducing agent tank, reducing agent pump, and battery] 1 and 2, in the engine compartment 15, a reducing agent tank 21 that stores urea water as a reducing agent, a reducing agent pump 22, and a battery 23 are provided on the vehicle body front side of the radiator 17. The reducing agent pump 22 is driven by power from the battery 23, and the urea water stored in the reducing agent tank 21 is supplied to the second exhaust gas purification device 19 by the reducing agent pump 22.

[0029] 2 and 3, the reducing agent tank 21 is provided alongside the battery 23. The reducing agent pump 22 is provided alongside the reducing agent tank 21 on the lateral side of the battery 23. Specifically, the reducing agent tank 21, the reducing agent pump 22, and the battery 23 are arranged in the vehicle width direction with the reducing agent pump 22 located between the reducing agent tank 21 and the battery 23. In the present embodiment, the battery 23 is located on the right side of the vehicle body of the reducing agent pump 22, and the reducing agent tank 21 is located on the left side of the vehicle body of the reducing agent pump 22, but it is also possible to employ an arrangement in which the battery 23 is located on the left side of the vehicle body of the reducing agent pump 22, and the reducing agent tank 21 is located on the right side of the vehicle body of the reducing agent pump 22.

[0030] [Battery configuration] As shown in FIGS. 2 and 3 , the battery 23 is placed on a mounting base 24 and is configured to be pressed and fixed to the mounting base 24 by a fixing member 25 abutting against the upper surface of the battery 23. The battery 23 has a rectangular shape in a plan view, and is configured to be placed on the mounting base 24 with its longitudinal direction in a plan view facing the front-to-rear direction of the vehicle body. In this embodiment, as shown in FIGS. 3 and 7 , the mounting base 24 is configured with three divided mounting bases 24 a arranged at intervals in the front-to-rear direction of the vehicle body. The mounting base 24 is supported by a support plate 26 provided above the front frame 8 that constitutes the body frame 4. The battery 23 is supported by the support plate 26 via the mounting base 24. As shown in FIG. 2 , the support plate 26 is supported by the front frame 8 by connecting legs 26 a provided on the underside of the support plate 26 to the front frame 8.

[0031] 2 and 3, one end 25a of the fixing member 25 that fixes the battery 23 to the mounting base 24 is configured to be supported by a support portion 28 provided on a pump support member 27 provided between the battery 23 and the reducing agent pump 22. The pump support member 27 is erected upward from the support plate 26 and supported by the support plate 26. As shown in FIGS. 2 and 6, the support portion 28 is provided with a threaded shank 28a onto which the one end 25a of the fixing member 25 is detachably fitted, and a pressing member 28b that detachably engages with the threaded shank 28a above the one end 25a fitted onto the threaded shank 28a. The pressing member 28b is configured to prevent the one end 25a fitted onto the threaded shank 28a from coming off, and to press the one end 25a against the battery 23 when tightened.

[0032] 2 and 3, the other end 25b of the fixing member 25 is configured to be supported by a second support portion 30 provided on a second support member 29 provided on the opposite side of the battery 23 from the reducing agent pump side. The second support member 29 is configured to extend upward from the support plate 26. As shown in FIG. 7, the second support portion 30 is provided with a second screw shank 30a onto which the other end 25b of the fixing member 25 is detachably fitted, and a second pressing member 30b detachably engaged with the second screw shank 30a above the other end 25b fitted onto the second screw shank 30a. The second pressing member 30b is configured to prevent the other end 25b fitted onto the second screw shank 30a from coming off and to press the other end 25b against the battery 23 when tightened.

[0033] One end 25a of the fixing member 25 is attached to the support portion 28 of the pump support member 27 and is pressed against the battery 23 by the pressing member 28b, and the other end 25b is attached to the second support portion 30 of the second support member 29 and is pressed against the battery 23 by the second pressing member 30b, so that it is abutted against the upper surface of the battery 23 and presses and fixes the battery 23 against the mounting base 24.

[0034] [Configuration of reducing agent tank] 5, a supply tube 21a extends upward and forward from the top of the reducing agent tank 21. The reducing agent tank 21 stores urea water as a reducing agent supplied from the supply tube 21a.

[0035] 2 and 3, the reducing agent tank 21 is supported by a tank case 31. The tank case 31 is provided with a bottom 31a that receives the lower portion 21b of the reducing agent tank 21 from below, and side plate portions 31b that rise from the bottom 31a toward both lateral sides of the reducing agent tank 21. A connecting portion 31c that connects the side plate portions 31b on both lateral sides and passes through the front side of the reducing agent tank 21 is provided across the side plate portions 31b on both lateral sides. The left and right side plate portions 31b are supported by the bottom 31a, and the bottom 31a is supported by the support plate 26 in a state where it fits into an opening 32 provided in the support plate 26. The reducing agent tank 21 is supported by the support plate 26 via the tank case 31.

[0036] As shown in Figures 2, 4, and 5, the lower portion 21b of the reducing agent tank 21 extends downward beyond the support plate 26 through an opening 32 in the support plate 26. As shown in Figure 5, a cutout portion 33 is provided in a lower corner of the reducing agent tank 21. The cutout portion 33 is provided across the entire width of the reducing agent tank 21. The lower portion 21b extends downward beyond the support plate 26, so that the capacity of the reducing agent tank 21 can be increased, and the cutout portion 33 suppresses an increase in capacity so that the capacity does not increase too much. In this embodiment, the cutout portion 33 is provided in a lower rear corner of the reducing agent tank 21, but it can also be provided in a lower front corner.

[0037] [Configuration of reducing agent pump] 2 and 4, the reducing agent pump 22 is located on the upper surface side of the support plate 26. As shown in FIGS. 2 and 6, the reducing agent pump 22 is supported by a pump support member 27 provided between the battery 23 and the reducing agent pump 22, and is configured to be supported by the support plate 26 via the pump support member 27.

[0038] 2 and 6, the pump support member 27 includes a front support portion 27a that rises upward from the support plate 26, and a rear support portion 27b that rises upward from the support plate 26 rearward of the front support portion 27a. Pump support portions 27e, to which the reducing agent pump 22 is connected, are provided on upper portions of the front support portion 27a and the rear support portion 27b. A side plate portion 31b on the reducing agent pump side of the tank case 31 is connected to the pump support portions 27e of the front support portion 27a and the rear support portion 27b, and the pump support portion 27e supports the reducing agent pump 22 via the side plate portion 31b. A first connecting portion 27c and a second connecting portion 27d that connect the front support portion 27a and the rear support portion 27b are provided across an upper portion of the front support portion 27a and an upper portion of the rear support portion 27b. A support portion 28 that supports one end portion 25a of the fixing member 25 is formed on the second connecting portion 27d.

[0039] 3 and 4, a hose 34 that connects the reducing agent pump 22 and the second exhaust gas purification device 19 is connected to the bottom of the reducing agent pump 22. The hose 34 extends from the bottom of the reducing agent pump 22, passing below the battery 23, toward the side of the vehicle body. The hose 34 is arranged so as to pass between adjacent divided mounting bases 24a in the space between the battery 23 and the support plate 26. The hose 34 can be drawn out from the reducing agent pump 22 to the side of the vehicle body without having to detour around the battery 23 in the front and rear directions.

[0040] [Another embodiment] (1) In the above embodiment, an example was shown in which the reducing agent pump 22 was provided side-by-side with the reducing agent tank 21 between the reducing agent tank 21 and the battery 23, but this is not limited to this. The reducing agent pump 22 may be provided in any location, such as outside the engine compartment 15, or in a location away from the reducing agent tank 21 and the battery 23.

[0041] (2) In the above embodiment, the battery 23 is shown as being installed with its longitudinal direction facing the front and rear of the vehicle body, but this is not limited to this, and the battery may also be installed with its longitudinal direction facing sideways of the vehicle body.

[0042] (3) In the above embodiment, an example is shown in which the reducing agent tank 21 is provided with a lower portion 21b that extends downward below the support plate 26 and a notch portion 33 provided at the lower corner, but this is not limited to this, and a reducing agent tank 21 in which the lower portion 21b does not extend downward below the support plate 26 and is not provided with a notch portion 33 may also be used.

[0043] (4) In the above embodiment, an example was shown in which the pump support member 27 was provided with the support portion 28, but this is not limited to this, and it is also possible to provide a dedicated support member for supporting one end 25a of the fixed member 25.

[0044] (5) In the above embodiment, an example is shown in which the hose 34 is configured to pass under the battery 23, but this is not limited to this, and the hose 34 may not pass under the battery 23, but may pass in front of or behind the battery 23. [Industrial Applicability]

[0045] The present invention can be applied to a tractor equipped with an exhaust gas purification device that purifies exhaust gas emitted from an engine with a reducing agent. [Explanation of symbols]

[0046] 5 Engine 8 Body frame (front frame) 15 Engine Room 17 Radiator 19 Exhaust gas purification equipment (second exhaust gas purification equipment) 21 Reductant tank 21b bottom 22 Reductant pump 23 Battery 24 Mounting table 25 Fixing member 26 Support Plate 27 Pump support member 28 Support part 33 Notch 34 Hose

Claims

1. a radiator provided in the engine compartment on the vehicle body forward of the engine for cooling the engine; an exhaust gas purification device that purifies exhaust gas emitted by the engine using a reducing agent; a reducing agent tank that stores a reducing agent to be supplied to the exhaust gas purification device, the reducing agent tank is provided in the engine compartment, further forward of the radiator in the vehicle body, and arranged side by side with the battery along the width direction of the vehicle body, a support plate that is provided above the vehicle body frame and supports the battery mounting base; the support plate has an opening; A tractor wherein a lower portion of the reducing agent tank passes through the opening and extends below the support plate.

2. a tank case supporting the reducing agent tank, the tank case has a bottom portion that is supported by a support plate and fits into the opening; 2. The tractor according to claim 1, wherein the bottom portion receives a lower portion of the reducing agent tank from below.

3. 3. The tractor according to claim 2, wherein the tank case has side plate portions that rise from the bottom toward both sides of the reducing agent tank.

4. 4. The tractor according to claim 3, wherein the tank case has connecting portions that connect the side plate portions on both sides.

Images