Work vehicles

Abstract

Some work vehicles have a sun visor mounted above the front of the cockpit. However, the sun visor requires clearance to rotate between its stowed and usable positions, and it is difficult to adjust the area of ​​sun protection. Therefore, in light of the above issues, we provide a work vehicle that can save space and effectively block sunlight. [Solution] In a work vehicle with a cockpit inside a cabin 7, the roof 14 that constitutes the upper part of the interior space of the cabin 7 has a downward convex shape in at least a part of it, and the upper end of the roll screen 34 that blocks glare from the front is positioned above the lower end of the roof 14.

Description

[[Technical Field]]

[0001] The present invention relates to a work vehicle such as an agricultural tractor. [[Background Art]]

[0002] There is a work vehicle having a sun visor attached to an upper front portion of a driver's seat (see, for example, Patent Document 1). [[Prior Art Documents]] [[Patent Documents]]

[0003] [[Patent Document 1]] Japanese Unexamined Patent Application Publication No. 2011-111101 [[Summary of the Invention]] [[Problem to be Solved by the Invention]]

[0004] However, a sun visor requires a clearance for pivoting between the stowed position and the use position, and it is difficult to adjust the light-shielding area.

[0005] In view of the above problem, an object of the present invention is to provide a work vehicle that saves space and can appropriately block sunlight. [[Means for Solving the Problem]]

[0006] The invention according to claim 1 provides a work vehicle including a driver's seat (8) provided in a cabin (7), wherein a roof (14) constituting an upper part of an internal space of the cabin (7) has a downward convex shape at least in a part thereof, and an upper end of a roll screen (34) that blocks glare from the front is positioned above a lower end of the roof (14).

[0007] According to the invention of claim 1, since the upper end of the roll screen (34) is positioned above the lower end of the convex shape below the roof (14), a wide field of view can be ensured when the roll screen (34) is stowed.

[0008] The invention described in claim 2 is a work vehicle according to claim 1, wherein the roll screen 34 blocks glare from the windshield FG, and brackets 33L and 33R supporting the roll screen 34 are provided to the left and right of the air outlet 31 of the air conditioner 30 located at the top of the cabin 7.

[0009] According to the invention described in claim 2, by using a roll screen 34 as a member for blocking glare from the windshield FG, the brackets 33L and 33R that support the roll screen 34 can be positioned outward in the left-right direction from the air outlet 31 of the air conditioner 30, the light-blocking range can be widened, the air outlet 31 can be positioned closer to the center, and the airflow can be directed onto the windshield FG to easily clear fog in the central part.

[0010] The invention described in claim 3 is a work vehicle according to claim 2, wherein air outlets 31 are provided on the left and right sides, and left and right brackets 33L and 33R that support a roll screen 34 are provided outside the left and right air outlets 31, 31.

[0011] According to the invention described in claim 3, vibrations occurring at the ends of the roller screen 34, which has a wide light-shielding range, can be suppressed.

[0012] The invention described in claim 4 is a work vehicle according to claim 1, wherein a rearview mirror 35 is mounted on the front frame 18 in front of the cabin 7 and is positioned opposite the windshield FG, and a roll screen 34 is positioned behind the windshield FG and in front of the rearview mirror 35.

[0013] According to the invention described in claim 4, by mounting the roller screen 34 in front of the rearview mirror 35, the light-blocking area of ​​the roller screen 34 can be widened without impairing the visibility of the rearview mirror 35.

[0014] The invention described in claim 5 is a work vehicle according to claim 1, wherein a monitor 36 is mounted on the right front frame 18 in front of the cabin 7 and is positioned opposite the windshield FG, and a roll screen 34 is positioned behind the windshield FG and in front of the monitor 36.

[0015] According to the invention described in claim 5, by mounting the roller screen 34 in front of the monitor 36, the light-blocking area of ​​the roller screen 34 can be widened without impairing the visibility of the monitor 36.

[0016] The invention described in claim 6 is a work vehicle according to claim 4 or 5, wherein the operating member 34b of the roll screen 34 is provided on the other side in the left-right direction relative to the rearview mirror 35 or monitor 36.

[0017] According to the invention described in claim 6, the rearview mirror 35 and monitor 36 do not get in the way when operating the operating member 34b. [Brief explanation of the drawing]

[0018] [Figure 1] This is a side view of a tractor according to an embodiment of the present invention. [Figure 2] This is a rear view showing the main parts of the cabin of a tractor according to an embodiment of the present invention. [Figure 3] This is a rear view showing the main parts of the cabin of a tractor according to an embodiment of the present invention. [Figure 4] This is a perspective view showing the main parts of the cabin of a tractor according to an embodiment of the present invention. [Figure 5] This is a perspective view showing the main parts of the cabin of a tractor according to an embodiment of the present invention. [Modes for carrying out the invention]

[0019] As one embodiment of the present invention, an agricultural tractor 1 equipped with a rotary tiller W, which is a type of work vehicle, will be described.

[0020] As shown in Figure 1, the tractor 1 is an agricultural tractor that performs work in a field F while traveling by itself.

[0021] Hereinafter, the front-rear direction refers to the traveling direction when the tractor 1 travels straight. The front side in the traveling direction is defined as "front", and the rear side is defined as "rear". The traveling direction of the tractor 1 is the direction from an operator's seat 8, which will be described later, toward a steering wheel 9 serving as a steering device when the tractor 1 travels straight.

[0022] The left-right direction is a direction horizontally orthogonal to the front-rear direction. Hereinafter, left and right are defined with the facing to the "front" side. That is, when an operator of the tractor 1 (also referred to as a "driver") sits on the operator's seat 8 and faces forward, the left hand side is "left" and the right hand side is "right".

[0023] The up-down direction is the vertical direction. The front-rear direction, the left-right direction and the up-down direction are orthogonal to each other. It should be noted that each direction is defined for convenience of description, and the present invention is not limited by these directions. In addition, hereinafter, the tractor 1 may be referred to as a machine body or a vehicle body.

[0024] As shown in Figure 1, the tractor 1 includes a traveling vehicle body 2 and a three-point link mechanism L serving as a working machine link mechanism at a rear portion of the traveling vehicle body 2. The traveling vehicle body 2 includes a vehicle body frame 3 serving as a main frame, left and right driving front wheels 4 steered by the steering wheel 9, left and right driving rear wheels 5, a bonnet 6, an engine E, a control section 7a in a cabin 7, and a transmission case 10.

[0025] The bonnet 6 is provided at a front portion of the traveling vehicle body 2 to be openable and closable. A front portion of the bonnet 6 can rotate (open and close) in the up-down direction with a rear portion of the bonnet 6 serving as a rotation center. In a closed state, the bonnet 6 covers the engine E mounted on the vehicle body frame 3.

[0026] The engine E is a driving source of the tractor 1, and is a heat engine such as a diesel engine or a gasoline engine.

[0027] The control unit 7a is located inside a cabin 7 situated on top of the vehicle body 2 and includes a cockpit 8, a steering wheel 9, and the like.

[0028] The cockpit 8 is the seat for the operator (driver). The steering wheel 9 is operated by the operator to steer the left and right front wheels 4.

[0029] The transmission case 10 houses the transmission (speed change mechanism). The transmission case 10 reduces the power (rotational power) transmitted from the engine E as needed by the transmission and transmits it to the drive wheels, which are the left and right drive front wheels 4 and left and right drive rear wheels 5, and the PTO shaft 45.

[0030] At the rear of the vehicle body 2, a hydraulic cylinder case 40 is provided on the upper rear of the transmission case 10. Lift arms 41, which constitute part of the hydraulic lifting mechanism, are rotatably mounted on both the left and right sides of this cylinder case 40. The lift arms 41 move up and down by the extension and retraction of the lifting hydraulic cylinder 40a.

[0031] Furthermore, a three-point linkage mechanism L consisting of a top link 42 and left and right lower links 43 is provided, and a rotary tilling implement W is attached to the three-point linkage mechanism L. The lower links 43 are connected to the lift arm 41 via a lift rod 44, thereby enabling the rotary tilling implement W to be raised and lowered. A PTO shaft 45 that transmits power to drive the rotary tilling implement W protrudes rearward from the transmission case 10.

[0032] The PTO shaft 45 transmits rotational power, which has been appropriately reduced by the transmission, to the rotary tilling implement W mounted on the rear of the vehicle body 2 via a drive shaft 46 equipped with universal joints at both ends.

[0033] The rotary tiller W is a machine that performs tilling work in field F. The rotary tiller W tills the field surface (soil) by rotating the tilling tines 47 with power transmitted from the PTO shaft 45.

[0034] The front of the control unit 7a is equipped with a front control panel FP containing various operating devices and display devices.

[0035] The front control panel FP section is equipped with various control pedals such as the accelerator pedal 11, left and right brake pedals 12L and 12R for braking the left and right rear wheels 5 respectively, and a clutch pedal, as well as various control levers such as the forward / reverse lever, accelerator lever, main transmission lever, sub-transmission lever, and turn signal lever for operating the turn signals.

[0036] Furthermore, a control device 13 is provided in the front control panel FP section, and a GNSS 15, which serves as a positioning device, is mounted on the front upper surface of the roof 14 of the cabin 7.

[0037] The control device 13 controls various parts such as the engine E, the drive system and operating system of the vehicle body 2, and the rotary tilling implement W, and is equipped with a recording unit that records various data such as a map database. The recording unit calculates the work route for the autonomous tractor 1 to perform round-trip work on the user-owned field F registered in the map database and stores the work route in the map database.

[0038] Tractor 1 receives signals from positioning satellites via GNSS15 in field F, calculates its position using the satellite positioning system, and autonomously drives (automatically operates) along the work route, performing tasks automatically.

[0039] Cabin 7 is fixed to the vehicle body via elastic materials such as vibration-damping rubber, which makes it difficult for vibrations from the vehicle body to be transmitted to Cabin 7.

[0040] Cabin 7 has a frame structure that is integrated by a floor 17, front frames 18 erected on the left and right front of the floor 17, rear frames 19 erected on the left and right rear of the cockpit 8 inside Cabin 7, also called the driver's seat, intermediate frames 20 erected in the middle of the front and rear, and an upper frame 21 connecting the upper ends of these frames 18, 19, and 20, and the upper part is covered by a roof 14 fixed to the upper frame 21.

[0041] Furthermore, the front and rear sides are equipped with a windshield FG and a rear window RG, while the left and right sides are equipped with opening and closing doors 22 and side windows SG.

[0042] The opening and closing door 22 is a glass door with transparency, and has an upper and lower edge. The front side follows the front frame 18, the lower rear side follows the fender 25, and the upper rear side follows the intermediate frame 20. A sealing material is fitted around the tempered glass. Two hinges 27 are provided between the rear of the opening and closing door 22 and the intermediate frame 20, one above the other. The hinges 27 are fixed from the outside of the intermediate frame 20 and the opening and closing door 22, allowing the opening and closing door 22 to rotate outwards and open the left and right sides of the cabin 7.

[0043] An outer door handle 28 is provided on the lower front outer side of the opening / closing door 22. An inner door handle is also provided on the inner side of the opposing opening / closing door 22.

[0044] As shown in Figures 2 to 5, an air conditioner 30 is installed on the inside of the roof 14 of the cabin 7, and left and right air outlets 31, 31 are provided on the left and right sides of the underside of the air conditioner 30, which is convex at the lower end of the roof 14.

[0045] Furthermore, some of the air blown from the left and right air vents 31, 31 of the air conditioner 30 is directed towards the windshield FG, serving as a defroster.

[0046] Furthermore, the bases of left and right brackets 33L and 33R, whose bases are fixed, are fixed to the front part of the upper frame 21 that secures the roof 14 inside the cabin 7, and the roll screen 34 is supported by these left and right brackets 33L and 33R.

[0047] The roll screen 34 is a common type. By pulling the pull handle members 34a located in the center of the left and right sides downwards, it unfolds to block glare from the front, such as from the windshield FG. By operating the storage operation member 34b located at the left end, it rolls up from the unfolded state to the stored state.

[0048] The left and right brackets 33L and 33R are located above the convex shape of the underside of the air conditioner 30 at the lower end of the roof 14. Therefore, the upper end of the roll screen 34 supported by the left and right brackets 33L and 33R is located above the convex shape of the underside of the air conditioner 30 at the lower end of the roof 14. By having the roll screen 34 partially fit into the convex shape that protrudes downwards from the roof 14, a wide field of view can be ensured when the roll screen is stored.

[0049] Furthermore, the left and right brackets 33L and 33R that support the roller screen 34 are positioned to the left and right of the left and right air outlets 31 and 31 of the air conditioner 30.

[0050] In the case of a sun visor, it had to be stored between the left and right air vents 31, 31, which limited its width and shading range. Also, the left and right air vents 31, 31 had to be positioned outside the stored sun visor.

[0051] In this embodiment, by using a roll screen 34 as a member to block glare from the front, the left and right brackets 33L and 33R that support the roll screen 34 can be placed to the left and right of the left and right air outlets 31 and 31 of the air conditioner 30, the light-blocking range can be widened, the left and right air outlets 31 and 31 can be positioned closer to the center, and the airflow can be directed onto the windshield FG to easily clear fog in the central part.

[0052] The roller screen 34 is supported by left and right brackets 33L and 33R, which are located outside the left and right air outlets 31 and 31.

[0053] Therefore, vibrations occurring at the edges of the roller screen 34, which has a wide light-blocking range, can be suppressed.

[0054] Additionally, a rearview mirror 35 is fixed to the front right frame 18 at the front of the cabin 7 by a mirror support stay 35a.

[0055] The rearview mirror 35 is positioned opposite the windshield FG.

[0056] The roller screen 34 is positioned behind the windshield FG and in front of the rearview mirror 35.

[0057] Therefore, by installing the roller screen 34 in front of the rearview mirror 35, the light-blocking area of ​​the roller screen 34 can be widened without impairing the visibility of the rearview mirror 35.

[0058] Additionally, two monitors 36 are fixed to the front right frame 18 at the front of the cabin 7 by monitor support stays 36a.

[0059] The monitor 36 is positioned opposite the windshield FG.

[0060] The roller screen 34 is positioned behind the windshield FG and in front of the monitor 36.

[0061] Therefore, by installing the roller screen 34 in front of the monitor 36, the light-blocking area of ​​the roller screen 34 can be widened without impairing the visibility of the monitor 36.

[0062] Furthermore, concentrating the rearview mirror 35, monitor 36, and control components on the right side of the cockpit 8 makes it easier to get in and out of the cabin 7 through the left-hand opening door 22, improving work efficiency.

[0063] Furthermore, the storage operation member 34b of the roll screen 34 is provided on the other side in the left-right direction relative to the rearview mirror 35 or monitor 36.

[0064] Therefore, the rearview mirror 35 and monitor 36 do not get in the way when operating the storage operation member 34b.

[0065] Furthermore, the storage operation member 34b of the roll screen 34 is positioned outward in the left-right direction from the air outlet 31, in a position where it is less likely to be moved by the air blown from the air outlet 31, and does not obstruct the forward view of the operator seated in the cockpit 8.

[0066] Furthermore, the cockpit 8 has a configuration that allows for forward and backward sliding movement and fixing, and the distance between the seat surface of the cockpit 8 and the pull handle member 34a and the storage operation member 34b of the roll screen 34 when it is in the stored position is within 1200 mm, so that a small-statured operator can reach and operate the pull handle member 34a and the storage operation member 34b of the roll screen 34 while seated.

[0067] Furthermore, if the left and right brackets 33L and 33R that support the roller screen 34 can also support the sun visor at the same time, it becomes possible to use the roller screen 34 and the sun visor interchangeably.

[0068] Alternatively, the sun visor can be removed from the bracket supporting the sun visor on the current model equipped with a sun visor, and a roller screen 34 can be attached, allowing the sun visor and roller screen 34 to be easily interchangeable. [Explanation of Symbols]

[0069] 7 cabins 8. Cockpit 14 Roof 18 Front frame 30 Air conditioner 31 Air outlet 33L Left Bracket 33R Right Bracket 34 Roller Blinds 34b Operating component (retractable operating component) 35 Rearview mirror 36 monitors FG Windshield

Claims

1. A work vehicle having a cockpit (8) inside a cabin (7), characterized in that the roof (14) that constitutes the upper part of the interior space of the cabin (7) has a downward convex shape in at least a part thereof, and the upper end of a roll screen (34) that blocks glare from the front is positioned above the lower end of the roof (14).

2. The work vehicle according to claim 1, characterized in that a roller screen (34) blocks glare from the windshield (FG), and brackets (33L, 33R) supporting the roller screen (34) are provided to the left and right of the air outlet (31) of the air conditioner (30) located at the top of the cabin (7).

3. The work vehicle according to claim 2, characterized in that air outlets (31) are provided on the left and right sides, and left and right brackets (33L, 33R) for supporting a roll screen (34) are provided outside the left and right air outlets (31, 31).

4. The work vehicle according to claim 1, characterized in that a rearview mirror (35) attached to the front frame (18) in front of the cabin (7) is provided facing the windshield (FG), and a roll screen (34) is positioned behind the windshield (FG) and in front of the rearview mirror (35).

5. The work vehicle according to claim 1, characterized in that a monitor (36) mounted on the right front frame (18) in front of the cabin (7) is positioned opposite the windshield (FG), and a roll screen (34) is positioned behind the windshield (FG) and in front of the monitor (36).

6. The work vehicle according to claim 4 or 5, characterized in that the operating member (34b) of the roller screen (34) is provided on the other side in the left-right direction relative to the rearview mirror (35) or monitor (36).

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