Working machinery

Abstract

In industrial machinery, the design aims to increase the space inside the engine compartment while minimizing the reduction in blade visibility. [Solution] The work machine comprises a blade, a left lift frame, a right lift frame, an engine, and an engine room. The left and right lift frames are positioned behind the blade and support the blade. The engine room is positioned behind the blade. The engine is located in the engine room. The engine room includes a lower chamber and an upper chamber. The lower chamber is positioned between the left and right lift frames. The upper chamber is positioned above the lower chamber. The upper chamber has a wider width than the lower chamber.

Description

Technical Field

[0001] The present invention relates to a working machine.

Background Art

[0002] Some working machines include a blade, an engine room, and left and right lift frames. For example, in the working machine of Patent Document 1, the blade is supported by the left and right lift frames. The engine room is disposed between the left and right lift frames behind the blade.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An engine and engine accessories are arranged in the engine room. Therefore, it is desirable to secure a large space in the engine room. However, when the engine room is arranged between the left and right lift frames as described above, it is not easy to increase the engine room in the width direction. Further, when the engine room is expanded upward, the visibility of the blade may be reduced. An object of the present disclosure is to expand the space in the engine room and suppress a decrease in the visibility of the blade in a working machine.

Means for Solving the Problems

[0005] A working machine according to one aspect of the present disclosure comprises a blade, a left lift frame, a right lift frame, an engine, and an engine chamber. The left lift frame and the right lift frame are positioned behind the blade and support the blade. The engine chamber is positioned behind the blade. The engine is located in the engine chamber. The engine chamber includes a lower chamber and an upper chamber. The lower chamber is positioned between the left lift frame and the right lift frame. The upper chamber is positioned above the lower chamber. The upper chamber has a wider width than the lower chamber. [Effects of the Invention]

[0006] According to this disclosure, in the engine compartment, the upper compartment has a wider width than the lower compartment. Therefore, the space inside the engine compartment can be expanded while suppressing upward expansion of the engine compartment. This suppresses the reduction in the visibility of the blade. [Brief explanation of the drawing]

[0007] [Figure 1] This is a perspective view showing a work machine according to an embodiment. [Figure 2] This is a left side view of the front of the work machine. [Figure 3] This is a right side view of the front of the work machine. [Figure 4] This is a top view of the front of the work machine. [Figure 5] This is a front view of the front of the work machine. [Figure 6] This is a perspective view showing the engine compartment. [Figure 7] This is a left side view showing the engine compartment. [Figure 8] This is a right side view showing the engine compartment. [Figure 9] This is a front view showing the engine compartment. [Figure 10] This is a left side view showing the front of the work machine with the left and right lift frames positioned at their highest point. [Figure 11] This is a right-side view showing the front of the work machine with the left and right lift frames positioned at their highest point. [Figure 12] This is a disassembled perspective view of the engine compartment. [Figure 13] This is a side view showing the internal configuration of the engine compartment. [Figure 14] This is a top view showing the internal configuration of the engine compartment. [Figure 15] This is a front view showing the internal configuration of the engine compartment. [Modes for carrying out the invention]

[0008] The following description of the work machine according to the embodiment will be made with reference to the drawings. Figure 1 is a perspective view showing the work machine 1 according to the embodiment. The work machine 1 according to this embodiment is a bulldozer. The work machine 1 comprises a vehicle body 2 and a work implement 3. The vehicle body 2 includes a driver's cab 4, an engine room 5, and a running gear 6. The engine room 5 is located in front of the driver's cab 4. An engine, which will be described later, is located inside the engine room 5. An exhaust pipe 7 and an intake pipe 8 extend from the top surface of the engine room 5. The running gear 6 is located at the bottom of the vehicle body 2. The running gear 6 includes left and right tracks 9A and 9B.

[0009] The implement 3 is attached to the vehicle body 2. The implement 3 includes a lift frame 11 and a blade 12. The lift frame 11 is attached to the vehicle body 2. The lift frame 11 supports the blade 12. The blade 12 is located at the front of the vehicle body 2. The engine compartment 5 is located behind the blade 12.

[0010] Figure 2 is a left side view of the front of the work machine 1. Figure 3 is a right side view of the front of the work machine 1. Figure 4 is a top view of the front of the work machine 1. Figure 5 is a front view of the front of the work machine 1. Note that the left and right tracks 9A and 9B are omitted in Figures 2 through 5. In Figure 5, the blade 12 is omitted.

[0011] As shown in FIGS. 2 to 5, the lift frame 11 includes a left lift frame 13, a right lift frame 14, and a connecting frame 15. The left and right lift frames 13, 14 extend rearward of the blade 12. The connecting frame 15 connects the left and right lift frames 13, 14 behind the blade 12. The connecting frame 15 supports the blade 12 via a ball joint (not shown) in front of it. The left and right lift frames 13, 14 are supported so as to be rotatable vertically about a lift axis A1 with respect to the vehicle body 2. The lift axis A1 extends in the vehicle width direction of the working machine 1.

[0012] The working machine 3 includes a left lift cylinder 16 and a right lift cylinder 17. The left lift cylinder 16 is connected to the left lift frame 13. The left lift cylinder 16 is disposed above the left lift frame 13. The left lift frame 13 includes a left cylinder support portion 21. The left cylinder support portion 21 extends upward from the left lift frame 13. The left lift cylinder 16 is connected to the left cylinder support portion 21.

[0013] The right lift cylinder 17 is connected to the right lift frame 14. The right lift cylinder 17 is disposed above the right lift frame 14. The right lift frame 14 includes a right cylinder support portion 22. The right cylinder support portion 22 extends upward from the right lift frame 14. The right lift cylinder 17 is connected to the right cylinder support portion 22.

[0014] The vehicle body 2 includes a vehicle body frame 23, a left cylinder mount 24, and a right cylinder mount 25. The vehicle body frame 23 is disposed below the engine room 5. The vehicle body frame 23 supports the engine room 5. The left cylinder mount 24 and the right cylinder mount 25 are connected to the vehicle body frame 23. The left cylinder mount 24 is disposed behind the left lift cylinder 16. The left lift cylinder 16 is connected to the left cylinder mount 24. The right cylinder mount 25 is disposed behind the right lift cylinder 17. The right lift cylinder 17 is connected to the right cylinder mount 25.

[0015] The left and right lift cylinders 16 and 17 are hydraulic cylinders. When the left and right lift cylinders 16 and 17 expand and contract, the lift frame 11 moves up and down around the lift axis A1. Thereby, the blade 12 moves up and down. The left and right lift cylinders 16 and 17 move up and down around the lift axis A1 together with the left and right lift frames 13 and 14.

[0016] The working machine 3 includes a left angle cylinder 18 and a right angle cylinder 19. The left angle cylinder 18 is connected to the blade 12 and the left lift frame 13. The left angle cylinder 18 is disposed above the left lift frame 13. The left angle cylinder 18 is connected to the left cylinder support portion 21. The left angle cylinder 18 is disposed in front of the left lift cylinder 16.

[0017] The right angle cylinder 19 is connected to the blade 12 and the right lift frame 14. The right angle cylinder 19 is disposed above the right lift frame 14. The right angle cylinder 19 is connected to the right cylinder support portion 22. The right angle cylinder 19 is disposed in front of the right lift cylinder 17.

[0018] The left and right angle cylinders 18 and 19 are hydraulic cylinders. When the left and right angle cylinders 18 and 19 expand and contract, the blade 12 performs an angle operation. The angle operation is an operation in which the blade 12 tilts with respect to the vehicle width direction. The left and right angle cylinders 18 and 19 move up and down around the lift axis A1 together with the left and right lift frames 13 and 14.

[0019] The engine room 5 is disposed between the left lift frame 13 and the right lift frame 14. The upper surface of the engine room 5 includes an inclined surface 30. The inclined surface 30 is inclined forward and downward. The engine room 5 includes a lower chamber 31 and an upper chamber 32. The lower chamber 31 is disposed between the left lift frame 13 and the right lift frame 14. In a side view of the vehicle, the lower chamber 31 overlaps the left lift frame 13 and the right lift frame 14.

[0020] The lower chamber 31 is positioned between the left lift cylinder 16 and the right lift cylinder 17. In a side view of the vehicle, the lower chamber 31 overlaps the left lift cylinder 16 and the right lift cylinder 17. The lower chamber 31 is positioned between the left angle cylinder 18 and the right angle cylinder 19. In a side view of the vehicle, the lower chamber 31 overlaps the left angle cylinder 18 and the right angle cylinder 19.

[0021] Figure 6 is a perspective view showing the engine compartment 5. Figure 7 is a left side view showing the engine compartment 5. Figure 8 is a right side view showing the engine compartment 5. Figure 9 is a front view showing the engine compartment 5. As shown in Figure 9, the lower compartment 31 is located between the left cylinder mount 24 and the right cylinder mount 25. The upper compartment 32 is located above the lower compartment 31. The upper compartment 32 has a width W2 that is wider than the width W1 of the lower compartment 31. The distance W3 in the width direction between the left cylinder mount 24 and the right cylinder mount 25 is narrower than the width W2 of the upper compartment 32.

[0022] The lower chamber 31 includes a lower left side 33 and a lower right side 34. The upper chamber 32 includes an upper left side 35 and an upper right side 36. The upper left side 35 is located above the lower left side 33. The upper left side 35 is located outside the lower left side 33. The upper right side 36 is located above the lower right side 34. The upper right side 36 is located outside the lower right side 34.

[0023] The engine compartment 5 includes a left step section 37 and a right step section 38. The left and right step sections 37 and 38 are located between the upper compartment 32 and the lower compartment 31. The left and right step sections 37 and 38 are the boundaries between the upper compartment 32 and the lower compartment 31. The upper compartment 32 is located above the left and right step sections 37 and 38. The lower compartment 31 is located below the left and right step sections 37 and 38. The left step section 37 is located between the upper left side surface 35 and the lower left side surface 33. The right step section 38 is located between the upper right side surface 36 and the lower right side surface 34.

[0024] As shown in Figure 7, the left section 37 includes the left rear section 41 and the left front section 42. In a side view of the vehicle, the left rear section 41 extends in the longitudinal direction. In a side view of the vehicle, the left front section 42 extends forward and upward from the left rear section 41, inclined. As shown in Figure 8, the right section 38 includes the right rear section 43 and the right front section 44. In a side view of the vehicle, the right rear section 43 extends in the longitudinal direction. In a side view of the vehicle, the right front section 44 extends forward and upward from the right rear section 43, inclined.

[0025] Figure 10 is a left side view showing the front of the work machine 1 with the left and right lift frames 13 and 14 positioned at their highest point. Figure 11 is a right side view showing the front of the work machine 1 with the left and right lift frames 13 and 14 positioned at their highest point. As shown in Figure 10, with the left and right lift frames 13 and 14 positioned at their highest point, the left step section 37 is located above the left lift frame 13. With the left and right lift frames 13 and 14 positioned at their highest point, the left step section 37 is located above the left lift cylinder 16. With the left and right lift frames 13 and 14 positioned at their highest point, the left step section 37 is located above the left angle cylinder 18. As described above, the left front step section 42 is inclined upward, thus avoiding interference between the left front step section 42 and the left angle cylinder 18.

[0026] As shown in Figure 10, with the left and right lift frames 13 and 14 positioned at their highest point, the right step section 38 is located above the right lift frame 14. With the left and right lift frames 13 and 14 positioned at their highest point, the right step section 38 is located above the right lift cylinder 17. With the left and right lift frames 13 and 14 positioned at their highest point, the right step section 38 is located above the right angle cylinder 19. As described above, the right front step section 44 is inclined upward, thus avoiding interference between the right front step section 44 and the right angle cylinder 19.

[0027] Figure 12 is an exploded perspective view of the engine compartment 5. As shown in Figure 12, the engine compartment 5 includes an upper hood 51 and a lower hood 52. The upper hood 51 and the lower hood 52 are separate parts. The upper hood 51 is detachable from the lower hood 52. The lower hood 52 is attached to the upper hood 51 by fastening members, such as bolts. As shown in Figure 6, the boundary 50 between the upper hood 51 and the lower hood 52 is included in the upper compartment 32. The boundary 50 between the upper hood 51 and the lower hood 52 is located above the stepped portions 37 and 38.

[0028] As shown in Figures 6 and 12, the engine compartment 5 includes a front upper opening 53 and a front lower opening 54. The front upper opening 53 is located on the front of the upper compartment 32. The front upper opening 53 is located on the upper hood 51. The front lower opening 54 is located on the front of the lower compartment 31. The front lower opening 54 is located on the lower hood 52. As shown in Figure 5, the front upper opening 53 is closed by a front upper cover 55. The front upper cover 55 is detachably attached to the engine compartment 5 by fastening members such as bolts. The front lower opening 54 is closed by a front lower cover 56. The front lower cover 56 is detachably attached to the engine compartment 5 by fastening members such as bolts.

[0029] As shown in Figure 7, the engine compartment 5 includes an upper left opening 57 and a lower left opening 58. The upper left opening 57 is located on the upper left side surface 35 of the upper compartment 32. The upper left opening 57 is located on the upper hood 51. The lower left opening 58 is located on the lower right side surface 34 of the lower compartment 31. The lower left opening 58 is located on the lower hood 52. As shown in Figure 2, the upper left opening 57 is closed by an upper left cover 61. The upper left cover 61 is detachably attached to the engine compartment 5 by fastening members such as bolts. The lower left opening 58 is closed by a lower left cover 62. The lower left cover 62 is detachably attached to the engine compartment 5 by fastening members such as bolts.

[0030] As shown in Figure 8, the engine compartment 5 includes an upper right opening 63 and a lower right opening 64. The upper right opening 63 is located on the upper right side 36 of the upper compartment 32. The upper right opening 63 is located on the upper hood 51. The lower right opening 64 is located on the lower right side 34 of the lower compartment 31. The lower right opening 64 is located on the lower hood 52. As shown in Figure 3, the upper right opening 63 is closed by an upper right cover 65. The upper right cover 65 is detachably attached to the engine compartment 5 by fastening members such as bolts. The lower right opening 64 is closed by a lower right cover 66. The lower right cover 66 is detachably attached to the engine compartment 5 by fastening members such as bolts.

[0031] Figure 13 is a side view showing the internal configuration of the engine compartment 5. Figure 14 is a top view showing the internal configuration of the engine compartment 5. Figure 15 is a front view showing the internal configuration of the engine compartment 5. In Figures 13 to 15, the engine compartment 5 is shown by a dashed line.

[0032] As shown in Figures 13 to 15, the work machine 1 comprises an engine 70 and an exhaust gas aftertreatment device 71. The engine 70 and the exhaust gas aftertreatment device 71 are located in the engine compartment 5. The exhaust gas aftertreatment device 71 is connected to the engine 70. The exhaust gas aftertreatment device 71 purifies the exhaust gas from the engine 70. The exhaust gas aftertreatment device 71 includes, for example, a diesel particulate filter (DPF) and selective catalytic reduction (SCR). The exhaust gas aftertreatment device 71 collects particulate matter in the exhaust gas. The exhaust gas aftertreatment device 71 reduces NOx in the exhaust gas.

[0033] The engine 70 is located within the lower compartment 31. The engine 70 is positioned below the boundary 50 between the upper hood 51 and the lower hood 52. The lower compartment 31 is provided with a front lower opening 54, a left lower opening 58, and a right lower opening 64. Maintenance of the engine 70 is possible through these openings 54, 58, and 64.

[0034] A support member 73 is positioned in front of the engine 70. The exhaust gas aftertreatment device 71 is supported by the support member 73. The exhaust gas aftertreatment device 71 is supported by the vehicle frame 23 via the support member 73. The exhaust gas aftertreatment device 71 is positioned above the engine 70. The exhaust gas aftertreatment device 71 is located in the upper chamber 32.

[0035] The exhaust gas aftertreatment device 71 has a roughly cylindrical shape that extends in the vehicle width direction. The exhaust gas aftertreatment device 71 is positioned such that its longitudinal direction faces the width direction of the upper chamber 32. As shown in Figure 15, the width of the exhaust gas aftertreatment device 71 is greater than the width of the lower chamber 31. The exhaust gas aftertreatment device 71 is positioned above the stepped sections 37 and 38. As shown in Figure 14, the exhaust gas aftertreatment device 71 overlaps with the stepped sections 37 and 38 in a top view of the vehicle.

[0036] At least a portion of the exhaust gas aftertreatment device 71 is positioned above the boundary 50 between the upper hood 51 and the lower hood 52. Therefore, by removing the upper hood 51 from the lower hood 52, maintenance or removal of the exhaust gas aftertreatment device 71 can be easily performed. The upper chamber 32 is provided with the aforementioned front upper opening 53, left upper opening 57, and right upper opening 63. Maintenance of the exhaust gas aftertreatment device 71 is possible through these openings 53, 57, and 63.

[0037] In the work machine 1 according to this embodiment described above, the upper chamber 32 of the engine chamber 5 has a wider width than the lower chamber 31. Therefore, the space inside the engine chamber 5 can be expanded while suppressing upward expansion of the engine chamber 5. As a result, the reduction in the visibility of the blade 12 is suppressed.

[0038] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the invention.

[0039] The work machine 1 is not limited to a bulldozer, but may be other vehicles such as a wheel loader. The running gear 6 is not limited to tracks, but may have wheels and tires. The structure of the lift frame 11 is not limited to that of the above embodiment and may be modified. For example, the left lift frame 13 and the right lift frame 14 may be separate entities.

[0040] The structure of the engine compartment 5 is not limited to that of the embodiment described above and may be modified. For example, the shapes of the lower compartment 31 and the upper compartment 32 may be changed. The positions or shapes of the stepped portions 37 and 38 may be changed. The exhaust gas aftertreatment device 71 may be placed inside the lower compartment 31. Devices other than the exhaust gas aftertreatment device 71 may be placed inside the engine compartment 5. The upper hood 51 may not be detachably attached to the lower hood 52 by bolts or the like, but may be attached to the lower hood 52 so as to be openable and closable via hinges or the like. [Industrial applicability]

[0041] According to this disclosure, in a work machine, it is possible to increase the space inside the engine compartment while suppressing the decrease in the visibility of the blade. [Explanation of Symbols]

[0042] 5: Engine compartment, 12: Blade, 13: Left lift frame, 14: Right lift frame, 16: Left lift cylinder, 17: Right lift cylinder, 24: Left cylinder mount, 25: Right cylinder mount, 31: Lower chamber, 32: Upper chamber, 37: Left step section, 41: Left rear section, 42: Left front section, 51: Upper hood, 52: Lower hood, 70: Engine, 71: Exhaust gas aftertreatment device

Claims

1. The blade and A left lift frame is positioned behind the blade and supports the blade, A right lift frame positioned behind the blade and supporting the blade, The engine and An engine compartment located behind the blade, in which the engine is located, Equipped with, The aforementioned engine compartment is A lower chamber is located between the left lift frame and the right lift frame, An upper chamber is located above the lower chamber and has a wider width than the lower chamber, including, A type of machinery used for industrial work.

2. The left lift frame and the right lift frame are movable up and down around a lift axis that extends in the width direction of the work machine. With the left lift frame and the right lift frame positioned at their highest point, the boundary between the upper chamber and the lower chamber is located above the left lift frame and the right lift frame. The work machine according to claim 1.

3. The left lift cylinder connected to the left lift frame, The right lift cylinder connected to the right lift frame, Furthermore, The lower chamber is located between the left lift cylinder and the right lift cylinder. The work machine according to claim 1.

4. The left lift frame and the right lift frame are movable up and down around a lift axis that extends in the width direction of the work machine. The left lift cylinder and the right lift cylinder are movable up and down together with the left lift frame and the right lift frame. With the left lift frame and the right lift frame positioned at their highest point, the boundary between the upper chamber and the lower chamber is located above the left lift cylinder and the right lift cylinder. The work machine according to claim 3.

5. The left cylinder mount to which the left lift cylinder is attached, The right cylinder mount to which the aforementioned right lift cylinder is attached, Furthermore, The lower chamber is located between the left cylinder mount and the right cylinder mount. The work machine according to claim 3.

6. The distance in the width direction between the left cylinder mount and the right cylinder mount is narrower than the width of the upper chamber. The working machine according to claim 5.

7. The engine compartment includes a stepped section located between the upper compartment and the lower compartment. The work machine according to claim 1.

8. The aforementioned stepped portion is In a side view of the vehicle, the rear section extends in the front-to-back direction, The aforementioned rear section extends forward and upward, sloping toward the front, including, The work machine according to claim 7.

9. The aforementioned engine compartment is Lower hood and The upper hood is separate from the lower hood and is detachable from the lower hood, including, The work machine according to claim 1.

10. The boundary between the upper hood and the lower hood is included in the upper chamber. The working machine according to claim 9.

11. The engine further comprises an exhaust gas aftertreatment device connected to the aforementioned engine, The exhaust gas aftertreatment device is located in the upper chamber. The work machine according to claim 1.

12. The exhaust gas aftertreatment device is arranged such that its longitudinal direction faces the width direction of the upper chamber. The work machine according to claim 11.

13. The engine is located in the lower chamber. The work machine according to claim 11.

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