JP2016044539A - Bulldozer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bulldozer capable of sufficiently securing capacity of a reducer tank, without reducing visibility of an operator.SOLUTION: A bulldozer 1 comprises a blade 4, an engine 11, a selective reducing catalyst device 12 for treating exhaust gas from the engine 11, a reducer tank module 6 for storing a reducer supplied to the selective reducing catalyst device 12 and a cab 2. The engine 11 is arranged in the rear of the blade 4, and the cab 2 is arranged in the rear of the engine 11, and the reducer tank module 6 is arranged on a first side of a lower part of the cab 2, respectively. At least a part of the reducer tank module 6 is superposed on the cab 2 in a top view.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a bulldozer equipped with a reducing agent tank.

  Patent Document 1 discloses a bulldozer in which the upper surface of the engine cover is inclined forward and downward (see Patent Document 1). In this bulldozer, the operator can visually recognize the upper part of the blade of the work machine, so that workability is improved.

  On the other hand, from the viewpoint of protecting the natural environment, bulldozers are required to clean the exhaust (see Patent Document 2). For this reason, exhaust treatment apparatuses have been mounted on bulldozers. Among them, in recent years, as an exhaust treatment device, it is required to mount a selective catalytic reduction (SCR) device for treating nitrogen oxide NOx. When the selective reduction catalyst device is mounted on the bulldozer, the reducing agent tank must also be mounted on the bulldozer. Moreover, the capacity of the reducing agent tank needs to be a predetermined ratio or more with respect to the capacity of the fuel tank.

JP 2013-174044 A JP 2013-227729 A

  In the invention according to Patent Document 1, a fuel tank, a hydraulic oil tank, and the like are disposed on the rear side of the box disposed from the left and right sides of the cab to the left and right rear. An engine cooling module such as a radiator is disposed behind the cab. These boxes have a small excess space because a battery, a frame of ROPS structure, and the like are arranged in addition to a fuel tank and a hydraulic oil tank of a predetermined capacity. In order to make it easier for the operator to visually recognize the positions of the left and right crawler belts, it is desirable not to enlarge the cover of the box or to project the cover sideways. Furthermore, forward and backward visibility is also important for bulldozer operators.

  The objective of this invention is providing the bulldozer which can fully ensure the capacity | capacitance of a reducing agent tank, without reducing visibility of an operator.

  The bulldozer according to the first aspect of the present invention includes a blade, an engine, a selective reduction catalyst device, a reducing agent tank, and a cab. The engine is arranged behind the blade. The selective catalytic reduction device processes exhaust from the engine. The reducing agent tank stores the reducing agent supplied to the selective reduction catalyst device. The cab is arranged behind the engine. The reducing agent tank is disposed on the first side of the lower part of the cab. In a top view, at least a part of the reducing agent tank overlaps with the cab.

  The lower side surface of the cab may be inclined inward in a front view.

  The bulldozer may further include a column portion having a ROPS structure. The column portion of the ROPS structure may be provided on the rear side of the lower portion of the cab. The reducing agent tank may be disposed in front of the column portion.

  The bulldozer may further include a battery. The battery may be disposed in front of the pillar portion. The reducing agent tank may be disposed in front of the battery.

  The bulldozer may further include a first housing cover that is inclined downward and to the first side, and a supply module for sending the reducing agent from the reducing agent tank to the selective reduction catalyst device. The reducing agent tank may include a supply port that is inclined toward the first accommodation cover. The supply module may be disposed between the first storage cover and the reducing agent tank and below the supply port.

  The reducing agent tank may include a recess formed on the first surface facing the first accommodation cover. A supply module may be disposed in the recess.

  The upper surface of the supply module may be inclined to the first side and downward.

  The bulldozer may include a reducing agent placement surface. The supply module may be arranged spaced apart upward from the mounting surface of the reducing agent tank.

  The bulldozer may further include a reducing agent tank housing member that houses the reducing agent tank. The supply module may be supported by the reducing agent tank housing member.

  The reducing agent tank housing member may include a rubber plate provided between the supply module and the reducing agent tank.

  The mounting surface of the reducing agent tank may include an insertion hole for inserting a filter that is removed / inserted from below the supply module when the filter of the supply module is replaced. The bulldozer may further include an opening / closing cover extending to the insertion hole.

  The bulldozer may further include a partition wall provided between the reducing agent tank and the battery.

  The bulldozer may further include a fuel tank, a hydraulic oil tank, and an engine cooling module. The fuel tank may be disposed on the second side opposite to the first side of the lower part of the cab. The hydraulic oil tank may be disposed on the first side and the rear end of the bulldozer. The engine cooling module may be provided between the fuel tank and the hydraulic oil tank and behind the cab.

  In the bulldozer according to the present invention, at least a part of the reducing agent tank overlaps with the cab when viewed from above. Therefore, by providing a part of the reducing agent tank in the lateral space below the cab, the capacity of the reducing agent tank can be increased without reducing the visibility of the operator.

FIG. 1 is a side view of a bulldozer. FIG. 2 is a top view of the bulldozer. FIG. 3 is a cross-sectional view of the first embodiment viewed from the section line III-III of FIG. FIG. 4 is an enlarged perspective view of the reducing agent tank module in the first embodiment. FIG. 5 is a side view of the first housing portion when the first housing cover and the other cover are removed in the first embodiment. FIG. 6 is a cross-sectional view taken along section line III-III in FIG. 1 when only the upper opening / closing cover of the first accommodation cover is opened in the first embodiment. FIG. 7 is a cross-sectional view of the second embodiment viewed from the section line III-III of FIG. FIG. 8 is an enlarged perspective view of the reducing agent tank module in the second embodiment. FIG. 9 is a side view of the first housing portion when the first housing cover and another cover are removed in the second embodiment. FIG. 10 is a cross-sectional view taken along section line III-III in FIG. 1 when only the upper opening / closing cover of the first accommodation cover is opened in the second embodiment.

<First Embodiment>
A bulldozer 1 according to an embodiment of the present invention is shown in FIGS. 1 and 2. FIG. 1 is a side view of the bulldozer 1, and FIG. 2 is a top view of the bulldozer 1. The bulldozer 1 includes a cab 2, a vehicle main body 3, and a work machine 4. In the following description, the front-rear direction means the front-rear direction of the bulldozer 1. In other words, the front-rear direction means the front-rear direction viewed from the operator seated on the cab 2. Further, the left-right direction means the left-right direction viewed from the operator seated on the cab 2. The side means the vehicle width direction of the bulldozer 1, that is, the left direction or the right direction described above.

[Cab 2]
The cab 2 is provided with a seat for the operator of the bulldozer 1 and a lever, pedal, and instruments for various operations. Further, the cab 2 has a driver protection structure (ROPS structure) 39 at the time of falling, and is disposed on the vehicle main body 3. The overturn driver protection structure (ROPS structure) 39 is standardized as ISO3471.

  The cab 2 has a pair of A pillars 21, a pair of B pillars 22, and a pair of C pillars 23 in order from the front. Each pillar 21-23 is spaced apart in the left-right direction and extends in the up-down direction. Here, the front side of the B pillar 22 is called the front side of the cab 2, and the rear side of the B pillar 22 is called the rear side of the cab 2. The ROPS structure 39 includes a ROPS left column portion 39a, a ROPS right column portion 39b, and a ROPS beam portion 39c. The ROPS structure 39 is provided on the lower portion 2a (see FIG. 3) and the rear side of the cab 2. The ROPS left column portion 39a is disposed on the rear side and the left side of the cab 2. The ROPS right column portion 39b is disposed on the rear side and the right side of the cab 2. The ROPS beam portion 39c is disposed on the upper surface of the ROPS left column portion 39a and the ROPS right column portion 39b on the rear side of the cab 2. The ROPS beam portion 39c extends between the ROPS left column portion 39a and the ROPS right column portion 39b. The pair of C pillars 23 are supported by the ROPS beam portion 39c. The pair of B pillars 22 and the pair of C pillars 23 are arranged at substantially the same interval. A pair of rear side surfaces 24 connecting the B pillar 22 and the C pillar 23 are arranged substantially parallel to each other. On the other hand, the pair of A pillars 21 are arranged with a smaller interval than the pair of B pillars 22. The pair of front side surfaces 25 connecting the A pillar 21 and the B pillar 22 are arranged so that the distance in the left-right direction becomes smaller toward the front side. The front side surface 25 is connected to the front surface of the cab 2 with an inclination. The cab 2 has a tapered outer shape with a small width in the left-right direction on the front side. The front side surface 25 is provided with an operator doorway, and a door 26 is attached thereto. In addition, a front window portion 20 is provided in the upper half of the front surface of the cab 2 so that an internal operator can see the front.

[Vehicle body 3]
The vehicle main body 3 includes an engine hood 31, an exhaust pipe 32, left and right traveling devices 33, a first housing portion 5, a second housing portion 34, and a main frame (not shown) that supports them.

  The engine hood 31 is provided in front of the cab 2. The upper surface of the engine hood 31 is inclined forward and downward. The rear end portion of the upper surface of the engine hood 31 is connected to the lower end of the front window portion 20 of the cab 2. An opening through which the intake port of the air cleaner 36 and the exhaust pipe 32 pass is provided on the upper surface of the engine hood 31.

  The vehicle body 3 includes an engine 11 and a selective reduction catalyst device 12 inside the engine hood 31. That is, the cab 2 is disposed behind the engine 11. That is, the engine 11 and the selective catalytic reduction device 12 are disposed inside the engine hood 31. The engine 11 is, for example, a diesel engine, and generates a driving force for driving the traveling device 33, a work machine pump (not shown), and the like. The selective catalytic reduction device 12 processes the exhaust from the engine 11 with a reducing agent. The selective reduction catalyst device 12 selectively reduces nitrogen oxides NOx. In the present embodiment, the reducing agent is, for example, urea water. When the reducing agent is urea water, the selective catalytic reduction device 12 here also includes piping for injecting urea water into the exhaust and hydrolyzing it in the exhaust to obtain ammonia gas.

  The exhaust pipe 32 is a pipe for discharging the exhaust from the engine 11 processed by the selective reduction catalyst device 12 to the outside. The exhaust pipe 32 is provided so as to protrude upward from the upper surface of the engine hood 31. The upper end of the exhaust pipe 32 reaches the vicinity of the upper surface of the cab 2. The exhaust pipe 32 is arranged eccentrically from the center in the left-right direction of the engine hood 31 to the side. The exhaust pipe 32 is erected at a position overlapping the right A pillar of the pair of A pillars 21 as viewed from the rear, that is, as viewed from the operator in the cab 2. Thereby, the exhaust pipe 32 prevents the front visibility from the operator in the cab 2 from being lowered. A head portion 37 of an air cleaner 36 is disposed behind the exhaust pipe 32.

  The traveling device 33 is attached to both the left and right sides of the main frame. The traveling device 33 has a crawler belt 33a. The bulldozer 1 moves by rotating the crawler belts 33a wound around the upper and lower wheels.

  The 1st accommodating part 5 is attached to the 1st side of the lower part 2a (refer FIG. 3) of the cab 2. As shown in FIG. In FIGS. 1 and 2, the left side is illustrated as the first side, but it may be right. The vehicle body 3 includes a reducing agent tank module 6, a battery 15, and a hydraulic oil tank 14 inside the first housing 5. That is, the reducing agent tank module 6, the battery 15, and the hydraulic oil tank 14 are stored in the first storage unit 5. That is, the reducing agent tank module 6 is disposed on the first side of the lower portion 2a (see FIG. 3) of the cab 2. The hydraulic oil tank 14 stores hydraulic oil supplied to the transmission system and the work machine 4 system. The hydraulic oil tank 14 is disposed at the rear end of the first housing portion 5. That is, the hydraulic oil tank 14 is disposed on the first side and the rear end of the bulldozer 1. The reducing agent tank module 6 includes a reducing agent tank 60 (see FIG. 4 and the like) described later. The reducing agent tank 60 stores a reducing agent used in the selective reduction catalyst device 12. The reducing agent is supplied to the selective reduction catalyst device 12. The battery 15 is used as a power source for ignition and lighting of the engine 11. The first accommodating portion 5 further accommodates the ROPS left column portion 39a.

  The 2nd accommodating part 34 is attached to the 2nd side opposite to the 1st side of the lower part 2a (refer FIG. 3) of the cab 2. As shown in FIG. The vehicle body 3 includes a fuel tank 13 inside the second housing portion 34. That is, the fuel tank 13 is stored in the second storage portion 34. In other words, the fuel tank 13 is disposed on the second side of the lower portion 2a of the cab 2 (see FIG. 3). The fuel tank 13 stores fuel supplied to the engine 11. The second accommodating portion 34 further accommodates the ROPS right column portion 39b.

  The vehicle body 3 includes the engine cooling module 16 behind the ROPS structure 39. Specifically, the engine cooling module 16 is provided between the left and right first housing portions 5 and the second housing portion 34 and behind the cab 2. In other words, the engine cooling module 16 is provided between the fuel tank 13 and the hydraulic oil tank 14 and behind the cab 2. Further, the engine cooling module 16 is disposed in front of the rear ends of the covers of the first housing portion 5 and the second housing portion 34. As a result, the engine cooling module 16 can be protected from external obstacles, and the rear working state can be easily confirmed through the engine cooling module 16 when viewed from the cab 2. For this reason, even when a ripper or a winch is attached to the rear part of the bulldozer 1, the work can be performed while checking the rear working machine from the cab 2 through the engine cooling module 16.

  The engine cooling module 16 includes, for example, a radiator, a fan, and a motor. The engine cooling module 16 cools the engine 11 by rotating a fan with a motor to cool the cooling water flowing in the radiator.

[Working machine 4]
The work machine 4 includes a blade 41, an arm member 42, and hydraulic cylinders 43 and 44. The blade 41 is provided in front of the engine hood 31. That is, the engine 11 is disposed behind the blade 41. The blade 41 has a width larger than the width of the cab 2 in the left-right direction. Further, in a state where the lower end portion of the blade 41 is in contact with the ground, the upper end portion of the blade 41 is located below the upper surface of the engine hood 31, and the upper surface of the engine hood 31 is the seat in the cab 2. Is positioned below the imaginary line connecting the viewpoint of the operator seated on the upper end of the blade 41. The arm member 42 supports the work machine 4. One end of the arm member 42 is connected to the vehicle body 3, and the other end of the arm member 42 is connected to the blade 41. The hydraulic cylinders 43 and 44 are hydraulic actuators that tilt and move the blade 41 in a desired direction by expanding and contracting.

[Detailed structure of the first accommodating portion 5]
Referring to FIG. 3, the lower portion 2 a of the cab 2 includes an attachment portion 27, a floor portion 28, and a floor support portion 29. Here, the lower portion 2 a of the cab 2 indicates a portion of the cab 2 that is lower than the lower end of the rear side surface 24. The attachment portion 27 has an upper surface corresponding to the height of the elbow of the operator's hand when the operator is seated. An operation lever or the like is attached to the attachment portion 27. The floor 28 corresponds to a floor on which an operator places his feet. The floor support portion 29 connects the attachment portion 27 and the floor portion 28. The floor support portion 29 is inclined downward and inward in a front view. That is, the side surface of the lower portion 2a of the cab 2 is inclined downward and inward in a front view.

  The first accommodating part 5 is connected to the lower part of the attaching part 27. The first accommodating portion 5 is disposed on the first side of the lower portion 2 a of the cab 2. In addition, since the 2nd accommodating part 34 is arrange | positioned in the left-right symmetric position with respect to the 1st accommodating part 5, the 2nd accommodating part 34 is arrange | positioned at the 2nd side of the lower part 2a of the cab 2. As shown in FIG. As is apparent from FIG. 3, at least a part of the first housing portion 5 overlaps with the cab 2 in a top view. The first accommodating portion 5 is supported from below by a main frame (not shown). The first storage unit 5 includes a first storage cover 51 and a bottom surface 52. The first housing cover 51 is inclined downward and to the first side. The first housing cover 51 includes an upper opening / closing cover 51a and a lower opening / closing cover 51b. The bottom surface 52 includes an insertion hole 53.

  3 and 4, the reducing agent tank module 6 stored in the first storage unit 5 includes a reducing agent tank 60, a reducing agent tank storage member 70, and a supply module 80. That is, the reducing agent tank 60 is stored in the first storage unit 5. The reducing agent tank 60 is disposed on the bottom surface 52 of the first storage unit 5. That is, the bottom surface 52 of the first storage unit 5 is a mounting surface on which the reducing agent tank 60 is mounted. 3 and 4, the outer shape of the reducing agent tank 60 hidden by the reducing agent tank housing member 70 is indicated by a dotted line. According to this, the reducing agent tank 60 has a substantially rectangular column shape. Further, at least a part of the reducing agent tank 60 overlaps with the cab 2 in a top view.

  The reducing agent tank 60 includes a replenishing port 61 extending obliquely upward on the upper surface thereof. The supply port 61 is inclined toward the first accommodation cover 51. The reducing agent tank 60 includes a first surface 65 and a recess 62 formed below the first surface 65. The first surface 65 faces the first housing cover 51 and is inclined downward and to the first side. The recessed portion 62 is recessed from the first surface 65 toward the second side. The recess 62 includes a mounting surface 62 b for mounting the supply module 80. The mounting surface 62b is inclined downward and to the first side. A portion of the recessed portion 62 excluding the mounting surface 62 b can be used as a handle when the reducing agent tank 60 is taken out.

  A substantially X-shaped groove 63 is provided on the side surface of the reducing agent tank 60 in the vehicle front-rear direction. That is, the reducing agent tank 60 includes the groove 63. As a result, the side strength of the reducing agent tank 60 is improved. Further, the groove 64 at the upper and first side corner of the groove 63 extends to the first surface 65. The retaining member 75 of the reducing agent tank housing member 70 is hung on the groove 64, and the retaining member 75 is fixed to the upper retaining member 76 of the reducing agent tank housing member 70. It is firmly fixed to the tank housing member 70.

  A heat exchanger 67 connected to a hot water pipe 66 for preventing freezing of the reducing agent is connected to the upper surface of the reducing agent tank 60. For example, a part of the cooling water heated by the engine 11 flows through the hot water pipe 66. That is, the reducing agent tank 60 includes a heat exchanger 67. The heat exchanger 67 has a pipe meandering in an L shape in the reducing agent tank 60, and warm water from the hot water pipe 66 flows through the pipe to warm the reducing agent in the reducing agent tank 60. In addition, illustration of the hot water piping 66 is abbreviate | omitted in FIG.

  The reducing agent tank housing member 70 houses the reducing agent tank 60. The reducing agent tank housing member 70 includes a bottom portion 71, an inner fixing portion 72, an outer fixing portion 73, a side surface fixing portion 74, a locking part 75, and an upper locking member 76. The bottom portion 71 is fixed to the bottom surface 52 of the first housing portion 5 using a bolt or the like. The inner fixing portion 72 is formed integrally with the bottom portion 71. Alternatively, it is fixed to the bottom 71 by welding or the like. The inner fixing portion 72 extends upward from the bottom portion 71. The inner fixing portion 72 is located on the second side with respect to the end portion 52 a on the second side side of the bottom surface 52 of the first housing portion 5. Between the inner fixing part 72 and the floor support part 29, a gap for allowing various pipes to pass therethrough is provided. The outer fixing portion 73 extends upward from the bottom portion 71 to the second side. The outer fixing portion 73 extends along the surface of the recessed portion 62. The outer fixing portion 73 is detachably fixed to the bottom portion 71 with a bolt or the like. The side surface fixing part 74 extends upward and toward the first side from the bottom part 71 and the inner fixing part 72. The above-described locking part 75 is attached to the side surface fixing portion 74, and the upper locking member 76 is fixed to the locking part 75 with a bolt or the like, whereby the reducing agent tank 60 is fixed.

  The supply module 80 is a pump for sending the reducing agent from the reducing agent tank 60 to the selective reduction catalyst device 12. As shown in FIG. 4, a first pipe 81, a second pipe 82, and a third pipe 83 are connected to the supply module 80. More specifically, a first pipe 81, a second pipe 82, and a third pipe 83 are connected to the upper surface 80 b of the supply module 80. The first pipe 81 is a pipe for sucking the reducing agent from the reducing agent tank 60. The second pipe 82 is a pipe for returning the reducing agent sucked up by the supply module 80 to the reducing agent tank 60 when the engine 11 is stopped. The third pipe is a pipe for sending the reducing agent to the selective reduction catalyst device 12. Nichrome wire is wound around these pipes. Freezing of the reducing agent can be prevented by flowing an electric current through the nichrome wire to heat the reducing agent.

  The first pipe 81, the second pipe 82, and the third pipe 83 are arranged to extend linearly from the upper surface 80 b of the supply module 80 at a predetermined distance. The supply module 80 is disposed on a mounting surface 62 b formed below the first surface 65. The distance between the mounting surface 62b and the first piping 81, the second piping 82, and the third piping 83 in the direction perpendicular to the mounting surface 62b is the mounting surface 62b between the mounting surface 62b and the first surface 65. Longer than the interval in the direction perpendicular to. Therefore, the first piping 81, the second piping 82, and the third piping 83 are difficult to bend because the nichrome wire is wound as described above, but the first piping 81 and the second piping 82 are used when wiring. And the curvature of the 3rd piping 83 can be made small, Therefore Wiring becomes easy.

  The supply module 80 needs to replace the filter 84 periodically. At this time, the filter 84 is removed / inserted from the lower side of the supply module 80 as indicated by a two-dot chain line in FIG. For the convenience of filter replacement, the insertion hole 53 of the first housing portion 5 can be inserted with a filter 84 that is removed / inserted from below the supply module 80.

  Further, the supply module 80 is disposed to be spaced upward from the bottom surface 52 of the first housing portion 5 for the convenience of replacing the filter 84. Accordingly, when the filter 84 of the supply module 80 is replaced, the filter 84 does not interfere with the covering band 33a. Therefore, the filter of the supply module 80 can be replaced without removing the supply module 80 from the reducing agent tank housing member 70. Therefore, maintenance of the supply module is improved.

  In order to separate the supply module 80 upward from the bottom surface 52 of the first housing portion 5, the supply module 80 is supported by the reducing agent tank housing member 70. That is, the supply module 80 is attached to the reducing agent tank housing member 70. Specifically, the supply module 80 is attached to the outer fixing portion 73 with a bolt or the like. Thereby, since the supply module 80 and the reducing agent tank 60 can be disposed close to each other, the length of the first pipe 81 and the second pipe 82 can be shortened. Therefore, maintenance of the reducing agent tank module 6 is further facilitated.

  As shown in FIG. 3, the supply module 80 is disposed between the first storage cover 51 and the reducing agent tank 60 and below the supply port 61. Further, the first accommodation cover 51 of the first accommodation portion 5 extends to the insertion hole 53. Therefore, as shown in FIG. 5, when the first storage cover 51 is removed, the supply port 61 of the reducing agent tank 60, the supply module 80, and the filter of the supply module 80 can be accessed. The first housing cover 51 includes an upper opening / closing cover 51 a that allows the replenishment port 61 to be accessible from the outside of the first housing portion 5, and a lower opening / closing cover that allows the supply module 80 to be accessed from the outside of the first housing portion 5. 51b. As shown in FIG. 6, only the upper opening / closing cover 51 a can be opened by the hinge 59 having the vehicle longitudinal direction as the rotation axis. Therefore, the reducing agent can be injected into the reducing agent tank 60 by opening only the upper opening / closing cover 51 a of the first accommodation cover 51. This facilitates maintenance of injecting the reducing agent into the reducing agent tank 60.

  Further, as shown in FIGS. 3 and 6, the reducing agent tank housing member 70 may include a rubber plate 77 provided between the supply module 80 and the reducing agent tank 60. As a result, the reducing agent tank 60 is pressed against the reducing agent tank housing member 70, so that the reducing agent tank 60 is firmly fixed to the reducing agent tank housing member 70.

  Next, the arrangement of the remaining members of the first housing portion 5 will be described. As shown in FIG. 5, tanks 19 such as a reserve tank (a tank for storing engine cooling water) are arranged in front of the hydraulic oil tank 14 and behind the ROPS left column 39 a. And the battery 15 is arrange | positioned inside the 1st accommodating part 5 and ahead of the ROPS left pillar part 39a. The reducing agent tank module 6 (reducing agent tank 60) is disposed in front of the battery 15. That is, the reducing agent tank module 6 (reducing agent tank 60) is disposed in front of the ROPS left column portion 39a. A partition wall 54 is provided between the reducing agent tank module 6 (reducing agent tank 60) and the battery 15. As a result, the heat generated at the rear of the first storage unit 5 is not easily transmitted to the reducing agent tank 60.

<Second Embodiment>
Next, a bulldozer 1a according to a second embodiment of the present invention will be described. The bulldozer 1a is almost the same as the bulldozer 1 of the first embodiment except for the first accommodating portion and the reducing agent tank module. Therefore, the 1st accommodating part of 2nd Embodiment is made into the 1st accommodating part 5a, the reducing agent tank module is made into the reducing agent tank module 6a, and it demonstrates centering on the point which is different from 1st Embodiment. In addition, about the same structure as 1st Embodiment, the code | symbol same as 1st Embodiment is attached | subjected and detailed description is abbreviate | omitted.

  Referring to FIG. 7, the first storage portion 5 a includes a first storage cover 56 and a bottom surface 57 different from the first storage cover 51 and the bottom surface 52 of the first embodiment. The first storage cover 56 is inclined downward and to the first side, but is inclined further downward than the first storage cover 51. The first housing cover 56 includes an upper opening / closing cover 56a and a lower opening / closing cover 56b. Although the bottom surface 57 does not include an insertion hole, the lower opening / closing cover 56b extends to a position 57f of the bottom surface 57 that is near the center position in the left-right direction of the first housing portion 5a. In other words, the lower opening / closing cover 56b extends to the position 57f of the bottom surface 57 positioned further on the second side than the end portion 80a on the second side of the supply module 80. Further, the upper surface 80c of the supply module 80 is inclined downward and to the first side. In other words, the first side (left side) surface 80d of the supply module 80 is inclined downward and to the second side (right side). Therefore, the first storage cover 56 is inclined further downward than the first storage cover 51 of the first embodiment, and the lateral visibility of the operator is further improved.

  7 and 8, the reducing agent tank module 6a includes a reducing agent tank 60a, a reducing agent tank housing member 70a, and a supply module 80. Also in the second embodiment, at least a part of the reducing agent tank 60a overlaps with the cab 2 in a top view. 7 and 8, the outer shape of the reducing agent tank 60a hidden by the reducing agent tank housing member 70a is indicated by a dotted line. According to this, the reducing agent tank 60a includes the first surface 65 that faces the first housing cover 56 and is inclined downward and to the first side, and extends obliquely upward on the first surface 65. A supply port 61a is included. Referring to FIGS. 8 and 9, the replenishing port 61 a is located in front of the central position of the reducing agent tank 60 a in the vehicle front-rear direction. That is, the supply port 61a is eccentric to the front side. The reducing agent tank 60a includes a recess 62a that is recessed from the first surface 65 toward the second side. The main surface of the recess 62a is inclined downward and to the second side. Accordingly, the upper surface 80c of the supply module 80 disposed in the recess 62a is inclined downward and to the first side. Thereby, access to the attachment part of the 1st piping 81, the attachment part of the 2nd piping 82, and the attachment part of the 3rd piping 83 becomes easy. Grooves 64 are formed at the corners on the upper side of the reducing agent tank 60 in the vehicle front-rear direction and on the first side. The shape of the groove 64 is a linear shape.

  The reducing agent tank housing member 70a houses the reducing agent tank 60a. The reducing agent tank housing member 70 a includes a bottom portion 71, an inner fixing portion 72, an outer fixing portion 73 a, a side surface fixing portion 74, a locking part 75, and an upper locking member 76. The bottom portion 71 is fixed to the bottom surface 57 of the first housing portion 5a using a bolt or the like. The inner fixing portion 72 is located on the second side with respect to the end portion 57a on the second lateral side of the bottom surface 57 of the first housing portion 5a. The outer fixing portion 73a extends upward from the bottom 71 along the surface of the recessed portion 62a and to the first side.

  Referring to FIG. 8, the first pipe 81, the second pipe 82, and the third pipe 83 connected to the supply module 80 are arranged so as to pass through the vehicle rear side of the supply port 61a. In addition, the first pipe 81, the second pipe 82, and the third pipe 83 are not easily bent because the nichrome wire is wound as described above, but the first pipe 81 and the second pipe 82 are used when wiring. And the curvature of the 3rd piping 83 can be made small, Therefore Wiring becomes easy.

  As shown in FIG. 7, the supply module 80 is disposed between the first housing cover 56 and the reducing agent tank 60a and below the supply port 61a. The first housing cover 56 of the first housing portion 5a extends to a position 57f on the bottom surface 57 that is near the center position in the left-right direction of the first housing portion 5a. Therefore, as shown in FIG. 9, when the first storage cover 56 is removed, it is possible to access both the supply port 61a of the reducing agent tank 60a and the supply module 80. Further, when the first accommodation cover 56 is removed, the bottom surface 57 does not exist below the supply module 80, so that the filter of the supply module 80 can be replaced. The first housing cover 56 includes an upper opening / closing cover 56a that allows the replenishment port 61a to be accessible from the outside of the first housing portion 5a, and a lower opening / closing cover that allows the supply module 80 to be accessed from the outside of the first housing portion 5a. 56b. As shown in FIG. 10, only the upper opening / closing cover 56a can be opened by the hinge 59a having the vertical axis as the rotation axis. Therefore, the reducing agent can be injected into the reducing agent tank 60 by opening only the upper opening / closing cover 56 a of the first accommodation cover 56. This facilitates maintenance of injecting the reducing agent into the reducing agent tank 60.

  Next, the arrangement of the remaining members of the first housing portion 5a will be described. Referring to FIG. 9, the orientation of the battery 15, the shape of the partition wall 54 a, and the shape of the ROPS left column 39 a are slightly changed depending on the change of the reducing agent tank module 6 a and the first housing cover 56, but other than that In addition, the remaining members of the first accommodating portion 5a are not significantly different from the members of the first embodiment.

<Features>
The bulldozers 1 and 1a according to the present embodiment have the following characteristics.
(1) In the bulldozers 1 and 1a, at least a part of the reducing agent tanks 60 and 60a overlaps the cab 2 in a top view. Therefore, by providing a part of the reducing agent tanks 60, 60a in the lateral space below the cab 2, the capacity of the reducing agent tanks 60, 60a can be increased. Therefore, it is possible to increase the capacity of the reducing agent tanks 60 and 60a while sufficiently securing the side visibility of the operator.

  (2) The lower side surface of the cab 2 is inclined inward in a front view. As a result, the capacity of the reducing agent tanks 60, 60a can be further increased.

  (3) The reducing agent tanks 60 and 60 a are disposed in front of the column part 39 a of the ROPS structure 39. Therefore, the reducing agents 60 and 60a are arranged in a narrow place. Therefore, the method of the present embodiment in which the reducing agent tanks 60, 60a are arranged so that at least a part of the reducing agent tanks 60, 60a overlaps the cab 2 in the top view is effective.

  (4) The reducing agent tanks 60 and 60 a are disposed further forward than the battery 15 disposed in front of the column part 39 a of the ROPS structure 39. Therefore, the reducing agents 60 and 60a are arranged in a narrower place. Therefore, the method of the present embodiment in which the reducing agent tanks 60, 60a are arranged so that at least a part of the reducing agent tanks 60, 60a overlaps the cab 2 in a top view is further effective.

  (5) The bulldozers 1 and 1a include first housing covers 51 and 56 that are inclined downward and to the first side. The reducing agent tanks 60 and 60 a include supply ports 61 and 61 a that are inclined toward the first housing covers 51 and 56. The supply module 80 is disposed between the first housing covers 51 and 56 and the reducing agent tanks 60 and 60a and below the supply ports 61 and 61a. Therefore, when the first storage covers 51 and 56 are removed, it is possible to access any of the supply ports 61 and 61a of the reducing agent tanks 60 and 60a, the supply module 80, and the filter of the supply module 80. In addition, since the supply module 80 is disposed near the lower ends of the first housing covers 51 and 56, it is not necessary to project the first housing covers 51 and 56 to the side for the supply module 80. Will improve.

  (6) The reducing agent tanks 60, 60a include recesses 62, 62a formed on the first surface 65 facing the first housing covers 51, 56. The supply module 80 is disposed in the recesses 62 and 62a. Thereby, the supply module 80 is arrange | positioned without protruding to the 1st side. Therefore, the side visibility of the bulldozers 1 and 1a is further improved.

  (7) The upper surface 80c of the supply module 80 is inclined to the first side and downward. As a result, the first housing cover 56 can be further tilted downward, further improving the lateral visibility of the operator.

  (8) The supply module 80 is spaced apart from the mounting surfaces 52 and 57 of the reducing agent tanks 60 and 60a. Accordingly, when the filter 84 of the supply module 80 is replaced, the filter 84 does not interfere with the covering band 33a. Therefore, the filter of the supply module 80 can be replaced without removing the supply module 80 from the reducing agent tank housing members 70 and 70a. Therefore, maintenance of the supply module is improved.

  (9) The supply module 80 is supported by the reducing agent tank housing members 70 and 70a. Thereby, the reducing agent tank modules 6 and 6a can be formed compactly.

  (10) The reducing agent tank housing member 70 includes a rubber plate 77 provided between the supply module 80 and the reducing agent tank 60. As a result, the reducing agent tank 60 is pressed against the reducing agent tank housing member 70, so that the reducing agent tank 60 is firmly fixed to the reducing agent tank housing member 70.

  (11) The bottom surface 52 of the first housing portion 5 includes an insertion hole 53 for inserting the filter 84 that is removed / inserted from below the supply module 80 when the filter 84 of the supply module 80 is replaced. The first housing cover 51 includes open / close covers 51a and 51b extending to the insertion holes. This facilitates replacement of the filter 84 of the supply module 80.

  (12) The bulldozer 1, 1 a includes partition walls 54, 54 a provided between the reducing agent tanks 60, 60 a and the battery 15. This makes it difficult for heat generated in a portion behind the reducing agent tanks 60 and 60a to be transmitted to the reducing agent tanks 60 and 60a.

  (13) The bulldozers 1 and 1 a further include a fuel tank 13, a hydraulic oil tank 14, and an engine cooling module 16. The fuel tank 13 is disposed on the second side opposite to the first side of the lower portion of the cab 2. The hydraulic oil tank 14 is arrange | positioned at the 1st side and rear end of the bulldozers 1 and 1a. The engine cooling module 16 is provided between the fuel tank 13 and the hydraulic oil tank 14 and behind the cab 2. Therefore, the reducing agent tanks 60 and 60a have no space to be arranged except in a narrow place. Therefore, the method of the present embodiment in which the reducing agent tanks 60 and 60a are arranged so that at least a part of the reducing agent tanks 60 and 60a overlaps the cab 2 in a top view is extremely effective.

<Modification>
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

  1st accommodating part 5,5a, 2nd accommodating part 34, fuel tank 13, hydraulic oil tank 14, battery 15, 1st accommodating cover 51,56, reducing agent tank 60,60a, reducing agent tank accommodating member 70,70a, The shape of the partition walls 54 and 54a is not limited to the shape of the above-described embodiment, and may be other shapes.

  The positions of the battery 15 and the hydraulic oil tank 14 may be interchanged. The positions of the battery 15 and the reducing agent tank modules 6 and 6a may be interchanged. Further, the hydraulic oil tank 14 or the battery 15 may be stored in the second storage portion 34 or other places. The rubber plate 77 may be omitted.

  ADVANTAGE OF THE INVENTION According to this invention, the bulldozer which can fully ensure the capacity | capacitance of a reducing agent tank can be provided, without reducing an operator's visibility.

Claims (9)

A reductant tank including a first side surface and a recess provided below the first side surface;
Reductant tank module.
A supply module including a pump for delivering the reducing agent from the reducing agent tank;
The supply module is disposed in the recess.
The reducing agent tank module according to claim 1.
The reducing agent tank further includes a replenishing port provided in the first side surface,
The reducing agent tank module according to claim 1 or 2.
The reducing agent tank is
A first upper surface located above the first side surface;
A supply port provided on the first side surface of the first upper surface;
Further including
The reducing agent tank module according to claim 1 or 2.
The replenishing port is inclined upward and to the first side;
The reducing agent module according to claim 3 or 4.
A filter disposed below the supply module;
The reducing agent tank module according to any one of claims 3 to 5.
The reducing agent tank module according to any one of claims 1 to 6, further comprising a reducing agent tank accommodating member that accommodates the reducing agent tank and supports the supply module.
It is further equipped with a pipe wound with nichrome wire,
The said supply module is a reducing agent tank module in any one of Claim 1 to 7 containing the 2nd upper surface to which the said piping is connected.
The first side surface is inclined downward and to the first side;
The reducing agent tank module according to any one of claims 1 to 8.

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