JP7658931B2 - Work vehicles - Google Patents

Description

The present invention relates to a work vehicle.

In the combine disclosed in Patent Document 1, a wiper drive mechanism that drives the wipers and a display device are arranged side by side on the left and right above the windshield of the driver's cabin.

Patent No. 4871039

If 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 in that the driver's field of vision is obstructed.

The present invention aims to provide a work vehicle that does not obstruct the driver's visibility.

The work vehicle according to the present invention comprises a driver's seat, a driver's cabin, a wiper drive mechanism, and a display device. The driver's cabin has a windshield that covers the driver's seat and is positioned in front of the driver's seat. The wiper drive mechanism is disposed above the windshield. The display device is disposed above the windshield in a position offset in the front-rear direction from the wiper drive mechanism, and is disposed so as to overlap at least a portion in the left-right direction.

The present invention provides a work vehicle that does not obstruct the driver's visibility.

FIG. 2 is a left side view of the combine harvester according to the embodiment. FIG. FIG. This is a rear view of the upper part of the inside of the driver's cabin. This is an oblique view of the upper part of the inside of the driver's cabin as seen from the left rear. 6 is a cross-sectional view of the driver's cabin taken along line VI-VI in FIG. FIG. 4 is an enlarged view showing the mounting structure of the display device.

The following describes an embodiment of the present invention with reference to the drawings. Note that in the drawings, the same or equivalent parts are designated by the same reference symbols and will not be described repeatedly.

A combine harvester 1 according to an embodiment will be described with reference to Figures 1 to 7. The combine harvester 1 is an example of a work vehicle. Figure 1 is a left side view of the combine harvester 1 according to an embodiment. In this specification, for ease of understanding, the front-rear direction, left-right direction, and up-down direction may be described. Here, the front-rear direction, left-right direction, and up-down direction are directions seen from the driver seated in the driver's seat 2b (see Figure 3) arranged in the internal space 2a of the driver's cabin 2. However, the front-rear direction, left-right direction, and up-down direction are defined merely for the convenience of explanation, and the definitions of these directions are not intended to limit the orientation of the combine harvester 1 of the present invention when in use.

The combine harvester 1 includes a driver's cabin 2, a running body 101, a running device 102, a harvesting device 200, a threshing device 300, and a grain tank 400.

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

The traveling device 102 is disposed below the traveling machine body 101 and supports the traveling machine body 101. The traveling device 102 causes the combine harvester 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. The pair of left and right traveling crawler devices causes the combine harvester 1 to travel in the forward and backward directions. In addition, the pair of left and right traveling crawler devices causes the combine harvester 1 to turn in the left and right directions.

The harvesting device 200 is disposed in front of the traveling machine body 101. The harvesting device 200 is driven based on the power generated by the engine. The harvesting device 200 harvests uncut stalks in the field. In this embodiment, the harvesting device 200 includes a harvesting frame 201 and a stalk transport device 204.

The reaping frame 201 is mounted on the front of the traveling body 101 so that it can be raised and lowered freely. A cutting blade is disposed below the reaping frame 201. The reaping device 200 moves the cutting blade back and forth to cut the uncut stalks in the field.

The stalk conveying device 204 conveys the stalks cut by the cutting blade to the threshing device 300.

The combine harvester 1 can drive the traveling device 102 to move within the field, while driving the harvesting device 200 to continuously harvest uncut stalks in the field.

The threshing device 300 is located at the upper left of the traveling body 101. The threshing device 300 is driven based on the power generated by the engine. The threshing device 300 threshes the tips of the harvested stalks transported to the traveling body 101 by the stalk transport device 204, and performs rocking sorting (gravity sorting) on the threshed tips (de-grained stalks). In this embodiment, the threshing device 300 is equipped with a winnowing fan 303 and a dust exhaust fan 305.

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

The dust exhaust fan 305 exhausts dust such as straw dust and other debris outside the machine.

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

The traveling machine body 101 further includes a driver's cabin 2. In this embodiment, the driver's cabin 2 is disposed above the traveling machine body 101 and in front of the grain tank 400.

Figure 2 is an exploded perspective view of the driver's cabin 2. Figure 3 is a front view of the driver's cabin 2. Figure 4 is a view of the upper part of the interior of the driver's cabin 2 from the rear.

The driver's cabin 2 comprises a main body 21 through which the driver can enter and exit, and a hollow roof box 22. The driver's cabin 2 is shaped to cover the driver's seat 2b. Inside the box-shaped main body 21, an internal space 2a is formed for the driver to sit in the driver's seat 2b and operate the combine harvester 1. In addition to the driver's seat 2b, the internal space 2a is provided with operating tools for operating the combine harvester 1, such as a steering wheel 2c, an engine key (not shown), a gear shift lever, and a work clutch lever.

The front of the main body 21 is made up of a windshield 21a. The windshield 21a is located in front of the driver's seat 2b. A wiper 30 and a display device 40 are located on the upper part of the windshield 21a. A metal ceiling frame 21b is fixed to the upper part of the main body 21. The ceiling frame 21b is one of the frames that make up the main body 21 of the driver's cabin 2. A roof box 22 is attached to the ceiling frame 21b. A number of work lights that shine light forward of the combine 1 are located on the front side of the roof box 22. The roof box 22 has an inner roof 23 and an outer roof 24.

The box-shaped inner roof 23 is fitted inside the ceiling frame 21b. The underside of the inner roof 23 forms the ceiling of the internal space 2a. In other words, the internal space 2a of the driver's cabin 2 is a space surrounded by the main body 21 and the inner roof 23. The space outside the internal space 2a is referred to as the external space. The external space includes a first external space 25 and a second external space 27 (see FIG. 6) described later.

A drawer 23a and an opening 23b are provided in the approximate center of the front of the inner roof 23. An opening 23d is provided in the left side of the front of the inner roof 23. Two air outlets 23c are provided on the left and right sides of the front of the inner roof 23. Note that the positions, number, shapes, etc. of the drawer 23a, the openings 23b and 23d, and the air outlets 23c are not limited to the illustrated example.

The lid-shaped outer roof 24 is fitted to 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 driver's cabin 2 through the air outlet 23c of the inner roof 23. In 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 disposed on the outer surface side of the windshield 21a, and the arm portion 32 is disposed 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 through 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 and communicating control signals.

The position of the wiper drive mechanism 31 is above and to the left of the driver's head 50 as shown in Figures 3 and 4, in a position that does not obstruct the driver's field of vision. The stopping position of the arm unit 32 is above the driver's head 50 as shown in Figures 3 and 4, and above the driver's eye line. When the arm unit 32 is driven by the wiper drive mechanism 31, the arm unit 32 removes water droplets and the like from the windshield 21a.

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

The display screen 42 is positioned facing the driver. The display screen 42 displays an image captured by a camera (not shown) mounted on the combine harvester 1. For example, the camera mounted on the combine harvester 1 captures an image of the rear of the threshing device 300. The display screen 42 displays an image of the rear of the threshing device 300 captured by the camera. The driver can check the dust discharge status behind the threshing device 300 while sitting in the driver's seat 2b. The camera may be mounted at the tip of the discharge auger 401 and capture an image in the direction of the grain discharge port 402. The camera installation position, the part to be photographed, and the number of cameras are arbitrary.

A camera may be provided at each of the multiple parts of the combine harvester 1. The driver can switch the camera image displayed on the display screen 42 by operating the display device 40. For example, if a first camera that takes an image behind the threshing device 300 and a second camera that takes an image in the direction of the grain discharge port 402 are provided, the driver can switch the camera image displayed on the display screen 42 between the image from the first camera and the image from the second camera by operating the display device 40.

The display device 40 is attached to the ceiling frame 21b that constitutes the driver's cabin 2. The display device 40 is firmly supported by being attached to the ceiling frame 21b, which is made of metal and has high strength. In this embodiment, the display device 40 is attached to the ceiling frame 21b by the mounting member 41. Details of the mounting member 41 will be described later.

As shown in Figures 3 and 4, the display device 40 is positioned above the driver's head 50 and in a position that does not obstruct the driver's field of vision. The display device 40 is also positioned at a position offset in the front-to-rear direction from the wiper drive mechanism 31, and is positioned so that it overlaps at least partially in the left-to-right direction. By offsetting the display device 40 and the wiper drive mechanism 31 in the front-to-rear direction, it is possible for the display device 40 and the wiper drive mechanism 31 to overlap in the left-to-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 field of vision is reduced compared to when they do not overlap. This makes it possible to provide a combine harvester 1 that does not obstruct the driver's field of vision. Note that the display device 40 and the wiper drive mechanism 31 may be positioned so that they completely overlap in the left-right direction. The greater the overlapping area between the display device 40 and the wiper drive mechanism 31, the less obstruction there will be to the driver's field of vision.

In addition, the air conditioner's air outlet 23c opens into the inner roof 23. In order to prevent a decrease in the efficiency of heating and cooling, it is preferable to position the display device 40 and the wiper drive mechanism 31 away from directly below the air outlet 23c.

Next, the wiring of the wire harnesses 33, 43 will be described with reference to Figures 5 and 6. Figure 5 is a perspective view of the upper part of the interior of the driver's cabin 2, seen from the rear left. Figure 6 is a cross-sectional view of the driver's cabin 2 taken along line VI-VI in Figure 3.

An upwardly protruding drawer 23a is formed at the front end of the inner roof 23, facing the ceiling frame 21b. The drawer 23a connects the internal space 2a to the second external space 27. The drawer 23a is used to draw 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 internal space 2a of the driver's cabin 2 to the second external space 27.

The inner roof 23 has an extracting section 23a that extracts the wire harnesses 33, 43 from the internal space 2a of the driver's cabin 2 to the second external space 27, so there is no need to route the wire harnesses 33, 43 in the internal space 2a of the driver's cabin 2. This allows the wire harnesses 33, 43 to be wired simply. This prevents the wire harnesses 33, 43 from obstructing the driver's field of vision.

One end of the 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 is drawn from the internal space 2a to the second external space 27 through the drawer portion 23a. The other end of the wire harness 33 drawn to the second external space 27 is drawn from the second external space 27 to the first external space 25 through an opening 23b formed in the front center of the inner roof 23. For example, a power supply box (not shown) is disposed 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 the 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 is pulled out from the internal space 2a to the second external space 27 through the pull-out section 23a. The other end of the wire harness 43 pulled out to the second external space 27 is pulled out from the second external space 27 to the first external space 25 through an opening 23d (see FIG. 2) formed on the front left side of the inner roof 23. 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 from the pull-out section 23a provided at the front center of the inner roof 23 to the second external space 27. The wire harness 33 pulled out to the second external space 27 is pulled out as it is to the first external space 25 from the opening 23b provided at the front center of the inner roof 23. On the other hand, the wire harness 43 pulled out to the second external space 27 is wired to the left along the ceiling frame 21b and pulled out to the first external space 25 through the opening 23d on the left side. In this way, by wiring the wire harness 33 and the wire harness 43 separately, 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 wiring method of the wire harnesses 33 and 43 is not limited to the above example.

Next, the mounting member 41 of the display device 40 will be described with reference to FIG. 7. 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 as viewed from the right side.

The mounting member 41 mounts 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 two-axis torque hinge, and holds the display device 40 so that its orientation can be adjusted in the up-down and left-right directions. The mounting member 41 includes a hinge 41a, arms 41b and 41c, a bracket 41d, and a bolt 41e.

The arm 41b is connected to the hinge 41a so that it can move in the vertical direction. The arm 41b is fixed to the hinge 41a and the rear surface of the display device 40. The rear surface of the display device 40 is the outer surface of the display device 40 opposite the display screen 42.

The arm 41c is connected to the hinge 41a so that it can move left and right. The arm 41c is fixed to the hinge 41a and the bracket 41d. In this embodiment, the arm 41c is fixed to the bolt 41e by the bolt 41e, but it 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 orientation of the display device 40 so that it can be adjusted in the up-down and left-right directions relative to the ceiling frame 21b.

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 in either the up-down direction or the left-right direction. The mounting member 41 may also be a ball joint that can adjust the orientation of the display device 40 in the up-down direction, the left-right 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 embodiment, and can be implemented in various forms without departing from the gist of the present invention. The above embodiment can be applied to a combine harvester 1 as well as to work vehicles such as tractors. The drawings mainly show each component in a schematic manner to facilitate understanding. Therefore, the thickness, shape, length, etc. of each component shown in the drawings may differ from the actual ones due to the convenience of creating the drawings.

The present invention can be applied to work vehicles such as head-feeding and normal type combine harvesters, as well as tractors.

1. Combine (work vehicle)
2 Driver's cabin 2a Internal space 2b Driver's seat 2c Steering wheel 21 Main body 21a Windshield 21b Ceiling frame (frame)
22 Roof box 23 Inner roof 23a Pull-out section 23b, 23d Opening 23c Air outlet 24 Outer roof 25 First exterior space 26 Harness holder 27 Second exterior space 30 Wiper 31 Wiper drive mechanism 32 Arm 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 machine body 102 Traveling device 200 Harvesting device 201 Harvesting frame 204 Grain stalk transport device 300 Threshing device 303 Winnowing fan 305 Dust discharge fan 400 Grain tank

Claims (3)

The driver's seat and
a driver's cabin having a windshield that covers the driver's seat and is disposed in front of the driver's seat;
A wiper drive mechanism disposed above the windshield;
a display device attached to a frame constituting the driver's cabin at an upper portion of the windshield, the display device being disposed at a position shifted in the front-rear direction from the wiper drive mechanism and being disposed so as to overlap at least a portion in the left-right direction ;
A work vehicle equipped with The work vehicle according to claim 1 , further comprising a mounting member for mounting the display device to the frame and for holding the display device so that an orientation of the display device can be adjusted. The driver's cabin has a roof box composed of an outer roof and an inner roof,
3. The work vehicle according to claim 1, wherein the inner roof has an outlet portion that outlets 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 an internal space of the driver's cabin to an external space.

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