JP2023131332A - work vehicle - Google Patents

Abstract

To provide a work vehicle that does not interfere with an operator's visual field.SOLUTION: A combine 1 includes an operator's seat 2b, an operation cabin 2, a wiper drive mechanism 31, and a display device 40. The operator's cabin 2 includes a windshield 21a of a shape for covering the operator's seat 2b, which is disposed in front of the operator's seat 2b. The wiper drive mechanism 31 is disposed in an upper part of the windshield 21a. The display device 40 is disposed at a position displaced in the longitudinal direction with respect to the wiper drive mechanism 31 in the upper part of the windshield 21a, and disposed with at least a part overlapping with it in the right-left direction.SELECTED DRAWING: Figure 4

Description

The present invention relates to a work vehicle.

In the combine disclosed in Patent Document 1, a wiper drive mechanism that drives a wiper and a display device are arranged side by side on the upper part of the windshield of the operating cabin.

Patent No. 4871039

When the upper part of the windshield is covered by the wiper drive mechanism and the display device as in Patent Document 1, there is a problem that the driver's visibility is obstructed.

An object of the present invention is to provide a work vehicle that does not obstruct the driver's view.

A work vehicle according to the present invention includes a driver seat, a driver cabin, a wiper drive mechanism, and a display device. The driver's cabin has a windshield that is shaped to cover the driver's seat and is disposed in front of the driver's seat. The wiper drive mechanism is disposed at the top of the windshield. The display device is disposed above the windshield at a position offset from the wiper drive mechanism in the front-rear direction, and at least partially overlaps with the wiper drive mechanism in the left-right direction.

According to the present invention, it is possible to provide a work vehicle that does not obstruct the driver's field of view.

It is a left side view of a combine concerning an embodiment. FIG. 3 is an exploded perspective view of the driving cabin. FIG. 3 is a front view of the driving cabin. FIG. 3 is a diagram of the upper part of the inside of the driving cabin seen from the rear. FIG. 3 is a perspective view of the upper part of the interior of the driver's cabin viewed from the rear left. FIG. 4 is a sectional view of the driving cabin taken along line VI-VI in FIG. 3; FIG. 3 is an enlarged view showing the mounting structure of the display device.

Embodiments of the present invention will be described with reference to the drawings. In addition, in the drawings, the same reference numerals are given to the same or corresponding parts, and the description will not be repeated.

A combine harvester 1 according to an embodiment will be described with reference to FIGS. 1 to 7. The combine harvester 1 is an example of a work vehicle. FIG. 1 is a left side view of a combine harvester 1 according to an embodiment. In addition, in this specification, in order to make understanding easy, a front-back direction, a left-right direction, and an up-down direction may be described. Here, the front-back direction, the left-right direction, and the up-down direction are directions seen from the driver seated on the driver seat 2b (see FIG. 3) arranged in the internal space 2a of the driver cabin 2. However, the front-rear direction, left-right direction, and up-down direction are only defined for convenience of explanation, and the definition of these directions is not intended to limit the orientation of the combine harvester 1 of the present invention when used.

The combine 1 includes an operating cabin 2, a traveling body 101, a traveling device 102, a reaping device 200, a threshing device 300, and a grain tank 400.

The traveling body 101 includes an engine (not shown). The engine is, for example, a diesel engine. An engine converts energy obtained by burning fuel into kinetic energy (power).

The traveling device 102 is arranged below the traveling body 101 and supports the traveling body 101. The traveling device 102 causes the combine 1 to travel. Specifically, the traveling device 102 travels based on the power generated by the engine. The traveling device 102 includes, for example, a pair of left and right traveling crawler devices. A pair of left and right traveling crawler devices cause the combine 1 to travel in the front-back direction. Further, the pair of left and right running crawler devices rotates the combine harvester 1 in the left and right direction.

The reaping device 200 is arranged in front of the traveling body 101. Reaping device 200 is driven based on power generated by an engine. The reaping device 200 reaps uncut grain culms in the field. In this embodiment, the reaping device 200 includes a reaping frame 201 and a grain culm conveying device 204.

The reaping frame 201 is attached to the front part of the traveling machine body 101 so as to be movable up and down. A cutting blade is arranged below the cutting frame 201. The reaping device 200 reciprocates the cutting blade in order to cut uncut grain culms in the field.

Grain culm conveyance device 204 conveys the harvested grain culm cut by the cutting blade to threshing device 300 .

The combine 1 can continuously reap uncut grain culms in the field by driving the reaping device 200 while driving the traveling device 102 to move within the field.

The threshing device 300 is arranged at the upper left of the traveling body 101. Thresher 300 is driven based on power generated by an engine. The threshing device 300 threshes the tip side of the harvested grain culm transported to the traveling body 101 by the grain culm transfer device 204, and performs rocking sorting (specific gravity sorting) on the threshed tip side (threshing). In this embodiment, the threshing device 300 includes a winnowing fan 303 and a dust exhaust fan 305.

The winnowing fan 303 supplies sorting air to the harvested grain culm after threshing. As a result, straw waste and impurities in the grain (threshed) are removed. The grains from which straw waste and impurities have been removed are transported to grain tank 400 and stored.

The dust exhaust fan 305 exhausts dust such as straw waste and foreign matter to the outside of the machine.

Glen tank 400 is arranged at the upper right of traveling body 101. The grain tank 400 stores grains threshed by the threshing device 300.

The traveling body 101 further includes a driving cabin 2. In this embodiment, the driving cabin 2 is arranged above the traveling body 101 and in front of the grain tank 400.

FIG. 2 is an exploded perspective view of the operating cabin 2. FIG. FIG. 3 is a front view of the driving cabin 2. FIG. 4 is a diagram of the upper part of the interior of the driving cabin 2 viewed from the rear.

The driving cabin 2 includes a main body part 21 into which a driver can enter and exit, and a hollow roof box 22. The driver's cabin 2 has a shape that covers the driver's seat 2b. Inside the box-shaped main body portion 21, an internal space 2a is formed for a driver to operate the combine harvester 1 while sitting on a driver's seat 2b. In addition to the driver's seat 2b, the interior space 2a is provided with operating tools for operating the combine 1, such as a handle 2c, an engine key (not shown), a gear shift lever, and a working clutch lever.

The front part of the main body part 21 is composed of a windshield 21a. The windshield 21a is arranged in front of the driver's seat 2b. A wiper 30 and a display device 40 are arranged above the windshield 21a. A metal ceiling frame 21b is fixed to the upper part of the main body part 21. The ceiling frame 21b is one of the frames that constitute the main body portion 21 of the operating cabin 2. A roof box 22 is attached to the ceiling frame 21b. On the front side of the roof box 22, a plurality of work lights that irradiate light to the front of the combine harvester 1 are arranged. The roof box 22 includes an inner roof 23 and an outer roof 24.

The box-shaped inner roof 23 is fitted inside the ceiling frame 21b. The lower surface of the inner roof 23 constitutes the ceiling of the interior space 2a. That is, the interior space 2a of the driving cabin 2 is a space surrounded by the main body portion 21 and the inner roof 23. The space outside the internal space 2a is referred to as an external space. The external space includes a first external space 25 and a second external space 27 (see FIG. 6), which will be described later.

A drawer portion 23a and an opening portion 23b are provided approximately at the center of the front portion of the inner roof 23. An opening 23d is provided on the left side of the front portion of the inner roof 23. Furthermore, two air outlets 23c are provided on the left and right sides of the front portion of the inner roof 23. Note that the positions, numbers, shapes, etc. of the drawer portion 23a, the openings 23b and 23d, and the air outlet 23c are not limited to the illustrated example.

The lid-shaped outer roof 24 is fitted onto the outside of the ceiling frame 21b. A first external space 25 is formed between the inner roof 23 and the outer roof 24. An air conditioner and the like are arranged in the first external space 25. The air conditioner arranged in the first external space 25 supplies cold air or hot air to the internal space 2a of the driving cabin 2 through the air outlet 23c of the inner roof 23. At the front of the inner roof 23, a second external space 27 (see FIG. 6) is formed between the inner roof 23 and the ceiling frame 21b.

The wiper 30 includes a wiper drive mechanism 31, an arm portion 32, and a wire harness 33. The wiper drive mechanism 31 is arranged on the outer surface side of the windshield 21a, and the arm part 32 is arranged on the outer surface side of the windshield 21a. In this embodiment, the wiper drive mechanism 31 is attached to the inner surface of the windshield 21a. The arm portion 32 is rotatably attached to the wiper drive mechanism 31 via a through hole opened in the windshield 21a. The wire harness 33 is a wiper wire harness. The wire harness 33 is used for supplying power to the wiper drive mechanism 31, communicating control signals, and the like.

As shown in FIGS. 3 and 4, the position of the wiper drive mechanism 31 is above and to the left of the driver's head 50, and is at a position that does not obstruct the driver's field of view. As shown in FIGS. 3 and 4, the stopping position of the arm portion 32 is above the driver's head 50 and above the driver's line of sight. When the arm portion 32 is driven by the wiper drive mechanism 31, the arm portion 32 removes water droplets and the like from the windshield 21a.

The display device 40 includes a mounting member 41, a display screen 42, and a wire harness 43. The display device 40 is arranged on the inner surface side of the windshield 21a. The wire harness 43 is a wire harness for a display device. The wire harness 43 is used for supplying power to the display device 40, communicating control signals, and the like.

The display screen 42 is arranged to face the driver. On the display screen 42, an image captured by a camera (not shown) provided in the combine harvester 1 is displayed. For example, a camera provided in the combine harvester 1 photographs the rear of the threshing device 300. The display screen 42 displays a rear image of the thresher 300 taken by the camera. The driver can check the dust discharge status behind the threshing device 300 while sitting in the driver's seat 2b. Note that the camera may be provided at the tip of the discharge auger 401 to photograph the direction of the grain outlet 402. The installation position of the camera, the part to be photographed, the number of cameras, etc. are arbitrary.

Note that a camera may be provided at each of a plurality of parts of the combine 1. The driver can switch the camera images displayed on the display screen 42 by operating the display device 40. For example, if a first camera that photographs the rear of the threshing device 300 and a second camera that photographs the direction of the grain outlet 402 are provided, the driver can operate the display device 40 to The camera image displayed on the display screen 42 can be switched between the first camera image and the second camera image.

The display device 40 is attached to the ceiling frame 21b that constitutes the driving cabin 2. By attaching the display device 40 to the ceiling frame 21b, which is made of metal and has high strength, the display device 40 is firmly supported. In this embodiment, the display device 40 is attached to the ceiling frame 21b using the attachment member 41. Details of the attachment member 41 will be described later.

The display device 40 is positioned above the driver's head 50, as shown in FIGS. 3 and 4, so as not to obstruct the driver's field of view. Further, the display device 40 is arranged at a position shifted from the wiper drive mechanism 31 in the front-rear direction, and at least partially overlaps with the wiper drive mechanism 31 in the left-right direction. By shifting the display device 40 and the wiper drive mechanism 31 in the front-rear direction, the display device 40 and the wiper drive mechanism 31 can overlap in the left-right direction.

By overlapping the display device 40 and the wiper drive mechanism 31 in the left-right direction, the area that obstructs the driver's view is reduced compared to a case where they do not overlap. Thereby, it is possible to provide a combine harvester 1 that does not obstruct the driver's view. Note that the display device 40 and the wiper drive mechanism 31 may be arranged to completely overlap in the left-right direction. The larger the area where the display device 40 and the wiper drive mechanism 31 overlap, the more the driver's view can be prevented from being obstructed.

Note that an air outlet 23c of an air conditioner is opened in the inner roof 23. In order to prevent a decrease in heating and cooling efficiency, it is preferable that the display device 40 and the wiper drive mechanism 31 be placed away from directly below the air outlet 23c.

Next, the wiring of the wire harnesses 33 and 43 will be explained with reference to FIGS. 5 and 6. FIG. 5 is a perspective view of the upper part of the interior of the driving cabin 2 viewed from the rear left. FIG. 6 is a sectional view of the operating cabin 2 taken along line VI-VI in FIG.

An upwardly convex drawer portion 23a is formed at the front end of the inner roof 23 at a portion facing the ceiling frame 21b. The interior space 2a and the second exterior space 27 communicate with each other through the drawer portion 23a. The drawer part 23a is for drawing out the wire harness 33 that supplies power to the wiper drive mechanism 31 and the wire harness 43 that supplies power to the display device 40 from the interior space 2a of the driving cabin 2 to the second exterior space 27. used.

Since the inner roof 23 has a drawer portion 23a that pulls out the wire harnesses 33, 43 from the interior space 2a of the driving cabin 2 to the second external space 27, it is necessary to route the wire harnesses 33, 43 in the interior space 2a of the driving cabin 2. There is no. Therefore, the wire harnesses 33 and 43 can be wired simply. Therefore, it is possible to prevent the wire harnesses 33 and 43 from obstructing the driver's view.

One end of a wire harness 33 that supplies power to the wiper drive mechanism 31 is connected to the wiper drive mechanism 31 . The other end of the wire harness 33 passes through the drawer portion 23a and is drawn out from the internal space 2a to the second external space 27. The other end of the wire harness 33 drawn out to the second external space 27 passes through an opening 23b formed in the center of the front part of the inner roof 23, and is drawn out from the second external space 27 to the first external space 25. . For example, a power supply box (not shown) is arranged in the first external space 25, and the other end of the wire harness 33 is connected to the power supply box. In this embodiment, a harness holder 26 that holds the wire harness 33 is attached to the opening 23b.

One end of a wire harness 43 that supplies power to the display device 40 is connected to the display device 40 . The other end of the wire harness 43 passes through the drawer portion 23a and is drawn out from the internal space 2a to the second external space 27. The other end of the wire harness 43 pulled out to the second external space 27 passes through an opening 23d (see FIG. 2) formed on the front left side of the inner roof 23, and passes from the second external space 27 to the first external space. It is pulled out to the space 25. The other end of the wire harness 43 is connected to, for example, a power supply box (not shown) arranged in the first external space 25.

In this embodiment, the wire harnesses 33 and 43 are pulled out together into the second external space 27 from a pullout part 23a provided at the center of the front part of the inner roof 23. The wire harness 33 drawn out into the second external space 27 is directly drawn out into the first external space 25 through an opening 23b provided at the center of the front part of the inner roof 23. On the other hand, the wire harness 43 drawn out to the second external space 27 is routed to the left along the ceiling frame 21b, and is drawn out to the first external space 25 through the left opening 23d. By wiring the wire harness 33 and the wire harness 43 separately in this way, it is possible to prevent noise generated by the wiper drive mechanism 31 from affecting the display device 40 via the wire harnesses 33 and 43. Note that the method of wiring the wire harnesses 33 and 43 is not limited to the above example.

Next, with reference to FIG. 7, the mounting member 41 of the display device 40 will be described. FIG. 7 is an enlarged view showing the mounting structure of the display device 40. In FIG. 7, the display device 40 and the mounting member 41 are shown from the right side.

The mounting member 41 attaches the display device 40 to the ceiling frame 21b and holds the display device 40 so that its orientation can be adjusted. The mounting member 41 is, for example, a biaxial torque hinge, and holds the display device 40 so that the orientation of the display device 40 can be adjusted in the vertical and horizontal directions. The mounting member 41 includes a hinge 41a, arms 41b and 41c, a bracket 41d, and a bolt 41e.

The arm 41b is movably connected to the hinge 41a in the vertical direction. The arm 41b is fixed to the hinge 41a and the back surface of the display device 40. The back surface of the display device 40 is the surface of the outer surface of the display device 40 that is opposite to the display screen 42 .

The arm 41c is movably connected to the hinge 41a in the left-right direction. Arm 41c is fixed to hinge 41a and bracket 41d. In this embodiment, the arm 41c and the bolt 41e are fixed by the bolt 41e, but the arm 41c and the bolt 41e may be fixed by other fixing methods. The bracket 41d is fixed to the ceiling frame 21b. With the above configuration, the mounting member 41 holds the display device 40 so that the orientation of the display device 40 can be adjusted in the vertical and horizontal directions with respect to the ceiling frame 21b.

Note that the mounting member 41 is not limited to a two-axis torque hinge. For example, the mounting member 41 may be a torque hinge that can adjust the orientation of the display device 40 either vertically or horizontally. Further, the mounting member 41 may be a ball joint that can adjust the orientation of the display device 40 in the vertical direction, the horizontal direction, and the rotational direction.

The present embodiment has been described above with reference to the drawings (FIGS. 1 to 7). However, the present invention is not limited to the above-described embodiments, and can be implemented in various forms without departing from the spirit thereof. The above embodiment can be applied to a work vehicle such as a tractor in addition to the combine 1. Further, the drawings mainly schematically show each component for ease of understanding. Therefore, the thickness, shape, length, etc. of each illustrated component may differ from the actual one due to drawing preparation considerations.

The present invention is applicable to work vehicles such as self-extracting type and ordinary combine harvesters, and tractors.

1 Combine harvester (work vehicle)
2 Driver cabin 2a Internal space 2b Driver seat 2c Handle 21 Main body 21a Windshield 21b Ceiling frame (frame)
22 Roof box 23 Inner roof 23a Drawer parts 23b, 23d Opening part 23c Air outlet 24 Outer roof 25 First external space 26 Harness holder 27 Second external space 30 Wiper 31 Wiper drive mechanism 32 Arm part 33 Wire harness (wiper wire Harness)
40 Display device 41 Mounting member 41a Hinge 41b, 41c Arm 41d Bracket 41e Bolt 42 Display screen 43 Wire harness (wire harness for display device)
50 Head 101 Traveling body 102 Traveling device 200 Reaping device 201 Reaping frame 204 Grain culm conveying device 300 Threshing device 303 Karasaki fan 305 Dust exhaust fan 400 Grain tank

Claims (4)

driver seat and
a driver's cabin having a windshield shaped to cover the driver's seat and placed in front of the driver's seat;
a wiper drive mechanism disposed at the top of the windshield;
A work vehicle, comprising: a display device disposed above the windshield at a position offset from the wiper drive mechanism in the front-rear direction and at least partially overlapping with the wiper drive mechanism in the left-right direction. The work vehicle according to claim 1, wherein the display device is attached to a frame that constitutes the driving cabin. The work vehicle according to claim 2, further comprising a mounting member that attaches the display device to the frame and holds the display device in an adjustable manner. The driving cabin has a roof box composed of an outer roof and an inner roof,
The inner roof has a drawer portion for pulling out a display device wire harness that supplies power to the display device and a wiper wire harness that supplies power to the wiper drive mechanism from the interior space of the driver cabin to the exterior space. The work vehicle according to any one of claims 1 to 3, comprising:

Images