Work vehicle

Abstract

There is a work vehicle in which a sun visor is installed in an upper portion in front of a driver's seat. However, the sun visor needs a gap for turning between a storage posture and a use posture, and it is difficult to adjust a light-shielding region. Therefore, in view of the above problem, the present application provides a work vehicle capable of saving space and properly shielding sunlight. The work vehicle, in which a driver's seat is provided in a cab (7), has a roof (14) constituting an upper portion of an internal space of the cab (7) having a convex shape projecting downward in at least a portion, and an upper end of a roller blind (34) for shielding glare from a front direction is positioned at a position higher than a lower end of the roof (14).

Description

Technical Field

[0001] This invention relates to working vehicles such as agricultural tractors. Background Technology

[0002] There are work vehicles with a sun visor installed above the driver's seat (for example, see Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2011-111101 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, sun visors require a gap between the storage and use positions, and it is difficult to adjust the area of ​​light blocking.

[0008] In view of the above-mentioned problems, the object of the present invention is to provide a work vehicle that can save space and provide adequate sun protection.

[0009] Methods for solving problems

[0010] The present invention is a work vehicle in which a driver's seat 8 is provided in the cab 7, and the roof 14, which forms the upper part of the interior space of the cab 7, has at least a portion of a downwardly protruding convex shape, such that the upper end of the roller blind 34 that blocks glare from the front is located above the lower end of the roof 14.

[0011] According to the work vehicle of the present invention, since the upper end of the roller blind 34 is positioned above the lower end of the convex shape below the roof 14, it is possible to ensure a wide field of vision when the roller blind 34 is retracted, thereby saving space and providing adequate sun protection. Attached Figure Description

[0012] Figure 1 This is a side view of a tractor according to an embodiment of the present invention.

[0013] Figure 2 This is a rear view showing the main parts of the cab of a tractor according to an embodiment of the present invention.

[0014] Figure 3 This is a rear view showing the main parts of the cab of a tractor according to an embodiment of the present invention.

[0015] Figure 4 This is a perspective view showing the main parts of the cab of a tractor according to an embodiment of the present invention.

[0016] Figure 5This is a perspective view showing the main parts of the cab of a tractor according to an embodiment of the present invention.

[0017] Symbol Explanation

[0018] 7. Cab; 8. Driver's seat; 14. Roof; 18. Front frame; 30. Air conditioner; 31. Air vent; 33L. Left bracket; 33R. Right bracket; 34. Roller blind; 34b. Operating components (storage operating components); 35. Rearview mirror; 36. Monitor; FG. Front window glass. Detailed Implementation

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

[0020] like Figure 1 As shown, tractor 1 is an agricultural tractor that operates autonomously while working in the field F.

[0021] Hereinafter, the forward and backward direction refers to the direction of travel of the tractor 1 when it is traveling straight. The front side of the direction of travel is defined as "front" and the rear side is defined as "rear". The direction of travel of the tractor 1 refers to the direction from the driver's seat 8 (described later) toward the steering wheel 9, which is the steering device, when traveling straight.

[0022] The left and right directions refer to directions that are horizontally orthogonal to the front and back directions. Hereinafter, the left and right sides are defined as facing "forward". That is, when the operator of the tractor 1 is seated in the driver's seat 8 facing forward, the left side is "left" and the right side is "right".

[0023] The vertical direction refers to the vertical direction. The front-back, left-right, and vertical directions are orthogonal to each other. It should be noted that these directions are defined for ease of explanation and are not intended to limit the invention. In addition, tractor 1 will sometimes be referred to as the machine body or vehicle body below.

[0024] like Figure 1 As shown, the tractor 1 has a traveling body 2 and a three-point linkage L at its rear, which serves as a linkage mechanism for working. The traveling body 2 has a body frame 3 that forms the main frame, left and right drive front wheels 4 that are steered via a steering wheel 9, left and right drive rear wheels 5, an engine hood 6, an engine E, an operating unit 7a in the cab 7, and a gearbox 10.

[0025] The engine hood 6 is located at the front of the vehicle body 2 and can be opened and closed freely. The front of the engine hood 6 can rotate (open and close) in the vertical direction with the rear as the center of rotation. When closed, the engine hood 6 covers the engine E mounted on the vehicle body frame 3.

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

[0027] The control unit 7a is located in the driver's cab 7 located on the upper part of the vehicle body 2, and includes a driver's seat 8, a steering wheel 9, etc.

[0028] The driver's seat 8 is the operator's seat. The steering wheel 9 is operated by the operator to steer the left and right drive front wheels 4.

[0029] The gearbox 10 houses the transmission (gear shifting mechanism). The gearbox 10 appropriately reduces the power (rotational power) transmitted from the engine E and transmits it to the left and right front drive wheels 4 and left and right rear drive wheels 5, as well as the PTO shaft 45, which serve as drive wheels.

[0030] At the rear of the vehicle body 2, a hydraulic cylinder housing 40 is located on the upper rear part of the gearbox 10. Lifting arms 41, which form part of the hydraulic lifting mechanism, are rotatably mounted on the left and right sides of the cylinder housing 40. The lifting 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 connecting rod 42 and left and right bottom connecting rods 43 is provided. A rotary tiller W is mounted on this three-point linkage mechanism L. The bottom connecting rods 43 are connected to the lifting arm 41 via a lifting rod 44, thereby enabling the rotary tiller W to be raised and lowered. The PTO shaft 45, which transmits power for driving the rotary tiller W, protrudes rearward from the gearbox 10.

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

[0033] The rotary tiller W is a machine used for tilling in the field F. The rotary tiller W uses power transmitted from the PTO shaft 45 to rotate the tilling claw 47, thereby tilling the field surface (soil).

[0034] A front operation panel FP is provided at the front of the control unit 7a, which is equipped with various operating devices, display devices, etc.

[0035] Furthermore, the front control panel FP section includes various operating pedals such as left and right brake pedals 12L and 12R for braking the accelerator pedal 11 and the left and right brakes for driving the left and right rear wheels 5, a clutch pedal, a forward / reverse lever, an accelerator lever, a main gear lever, a secondary gear lever, and a direction indicator lever that serves as a direction indicator.

[0036] In addition, a control device 13 is provided on the front control panel FP, and a GNSS 15 as a positioning device is provided on the front of the roof 14 of the cab 7.

[0037] The control device 13 controls the engine E, the drive system and operating system of the vehicle body 2, the rotary tiller W, and other components. It is also equipped with a recording unit that records various data such as map databases. The control device 1 calculates the operation path of the autonomous tractor 1 in the user-owned field F registered in the map database of the recording unit through the reciprocating process, and stores the operation path in the map database.

[0038] Tractor 1 receives signals from positioning satellites via GNSS 15 in field F, calculates its position information through the satellite positioning system, and autonomously drives (autonomous driving) along the work path to carry out the work automatically.

[0039] The cab 7 is fixed to the vehicle body by elastic components such as vibration damping rubber, making it difficult for vibrations from the vehicle body to be transmitted to the cab 7.

[0040] The cab 7 adopts a frame structure consisting of a floor 17, a front frame 18 erected on the left and right front of the floor 17, a rear frame 19 erected on the left and right rear of the driver's seat 8 in the cab 7 (also known as the driver's seat), a middle frame 20 erected in the middle of the front and rear, and an upper frame 21 that connects the upper ends of these frames 18, 19, and 20 to each other. The upper part is covered by a roof 14 fixed to the upper frame 21.

[0041] Furthermore, a front window FG and a rear window RG are provided on the front and rear surfaces, and an opening and closing door 22 and a side window SG are provided on the left and right surfaces.

[0042] The door 22, in its glass door form, is transparent and is constructed by embedding a sealing material around tempered glass. This tempered glass has a top and bottom edge, shaped as follows: the front edge along the front frame 18, the lower rear edge along the fender 25, and the upper rear edge along the middle frame 20. Hinges 27 are formed at both the top and bottom of the door 22 between its rear and the middle frame 20. The hinges 27 are fixed to the outer sides of both the middle frame 20 and the door 22, allowing the door 22 to rotate outwards and open the cab 7 to the left and right.

[0043] An outer door handle 28 is provided on the outer side below the front part of the opening and closing door 22. In addition, an inner door handle is provided on the inner side of the opposite opening and closing door 22.

[0044] like Figures 2-5 As shown, an air conditioner 30 is installed on the inner side of the roof 14 of the cab 7, and left and right air vents 31 are provided on the left and right sides of the lower surface of the air conditioner 30, which is convex at the lower end of the roof 14.

[0045] It should be noted that a portion of the air supplied from the left and right air outlets 31 of the air conditioner 30 is directed toward the front window glass FG to function as a defroster.

[0046] Furthermore, at the front of the upper frame 21 of the roof 14, which is fixed inside the cab 7 and faces left and right, there are fixed bases of left and right brackets 33L and 33R, on which the bases are fixed, and roller blinds 34 are supported.

[0047] The roller blind 34 is a typical roller blind. It is unfolded by pulling the handle 34a located in the center of the left and right sides downwards, so as to block glare from the front of the windshield FG and the like. By operating the storage operation member 34b located at the left end, it is rolled up upwards from the active state and stored.

[0048] The left and right brackets 33L and 33R are located above the lower surface of the air conditioner 30, which is convex at the lower end of the roof 14. Therefore, the upper end of the roller blind 34 supported by the left and right brackets 33L and 33R is located above the lower surface of the air conditioner 30, which is convex at the lower end of the roof 14. By retracting a part of the roller blind 34 into a convex shape that protrudes downward toward the roof 14, a wider field of vision can be ensured when it is retracted.

[0049] In addition, the left and right brackets 33L and 33R supporting the roller blind 34 are located on the left and right outer sides of the left and right air outlets 31 and 31 of the air conditioner 30.

[0050] In the case of a sunshade, it needs to be stored between the left and right air vents 31 and 31 during storage, which limits the width and light-blocking range. In addition, the left and right air vents 31 and 31 must be positioned on the outer side of the stored sunshade.

[0051] In this embodiment, by using the roller blind 34 as a component to block glare from the front, the left and right brackets 33L and 33R supporting the roller blind 34 can be positioned on the left and right outer sides of the left and right air outlets 31 and 31 of the air conditioner 30, thus widening the shading range. The left and right air outlets 31 and 31 can be positioned close to the center, allowing the air from the left and right air outlets 31 and 31 to blow onto the front windshield FG, thereby easily eliminating fogging in the central part.

[0052] Furthermore, the roller shutter 34 is supported by left and right brackets 33L and 33R, which are located on the outer side of the left and right air outlets 31 and 31.

[0053] Therefore, it is possible to suppress vibrations generated at the ends of the roller blind 34, which has a wide range of light-blocking.

[0054] Additionally, a rearview mirror 35 is fixed to the front frame 18 on the right side in front of the cab 7 using a rearview mirror support bracket 35a.

[0055] The rearview mirror 35 is positioned opposite the front window glass FG.

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

[0057] Therefore, by installing the roller blind 34 in a position further forward than the rearview mirror 35, the light-blocking area of ​​the roller blind 34 can be expanded without compromising the visibility of the rearview mirror 35.

[0058] In addition, two monitors 36 are fixed on the front frame 18 on the right side in front of the cab 7 via monitor support brackets 36a.

[0059] Monitor 36 is positioned opposite the front windshield glass FG.

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

[0061] Therefore, by installing the roller blind 34 in a position that is in front of the monitor 36, the light-blocking area of ​​the roller blind 34 can be expanded without compromising the visibility of the monitor 36.

[0062] Furthermore, if the rearview mirror 35, monitor 36, operating components, etc. are concentrated on the right side of the driver's seat 8, it is easier to get in and out of the cab 7 through the left-opening door 22, thus improving workability.

[0063] In addition, the retraction operation component 34b of the roller blind 34 is located on the opposite side in the left-right direction relative to the rearview mirror 35 or the monitor 36.

[0064] Therefore, the rearview mirror 35 and monitor 36 will not be obstructed when operating the storage operation component 34b.

[0065] Furthermore, the storage operation component 34b of the roller shutter 34 is located on the outer side of the air outlet 31 in the left-right direction, which is a position that is difficult to move due to the air supply from the air outlet 31, and will not obstruct the forward vision of the operator sitting in the driver's seat 8.

[0066] In addition, the driver's seat 8 is a structure that can be freely adjusted in both forward and backward sliding and fixed positions, so that the distance between the seat surface of the driver's seat 8 and the handle part 34a or the storage operation part 34b when the roller blind 34 is in the storage state is within 1200mm. Even small-sized operators can reach the handle part 34a or the storage operation part 34b of the roller blind 34 while seated and operate it.

[0067] Alternatively, if a structure is adopted in which the sunshade can also be supported on the left and right brackets 33L and 33R that support the roller blind 34, then the roller blind 34 and the sunshade can be used separately.

[0068] Alternatively, the sunshade can be removed from the bracket that supports the sunshade of an existing device equipped with a sunshade and the roller blind 34 can be installed, thus allowing for easy replacement of the sunshade and the roller blind 34.

[0069] As described above, the first invention of the present invention is a work vehicle in which a driver's seat 8 is provided in the cab 7, and the roof 14 constituting the upper part of the interior space of the cab 7 has a convex shape that protrudes downward in at least a portion, such that the upper end of the roller blind 34 that blocks glare from the front is located above the lower end of the roof 14.

[0070] According to the first invention of the present invention, the operation vehicle has a wide field of vision when the roller blind 34 is retracted, as the upper end of the roller blind 34 is positioned above the lower end of the convex shape below the roof 14, thereby saving space and providing adequate sun protection.

[0071] The second invention is that in the work vehicle of the first invention, the roller blind 34 blocks the glare from the front window glass FG, and the brackets 33L and 33R supporting the roller blind 34 are positioned on the outer side in the left-right direction than the air outlet 31 of the air conditioner 30 located on the upper part of the cab 7.

[0072] According to the second invention of the present invention, the work vehicle uses a roller shutter 34 as a component to block glare from the front windshield FG, thereby enabling the brackets 33L and 33R supporting the roller shutter 34 to be positioned further outward in the left-right direction than the air vent 31 of the air conditioner 30, thus widening the glare-blocking range. It is also possible to position the air vent 31 close to the center, so that the air from the air vent 31 can be blown onto the front windshield FG, thereby easily eliminating fogging in the central part.

[0073] The third invention is that in the working vehicle of the second invention, air outlets 31 are provided on the left and right sides, and left and right brackets 33L and 33R supporting the roller shutter 34 are provided on the outer side of the left and right air outlets 31 and 32.

[0074] The work vehicle according to the third invention of the present invention is able to suppress vibrations generated at the end of the roller blind 34 which has a wide range of light blocking.

[0075] The fourth invention is that in the work vehicle of the first invention, the rearview mirror 35 of the front frame 18 installed in front of the cab 7 is positioned opposite the front window glass FG, and the roller shutter 34 is positioned behind the front window glass FG and in front of the rearview mirror 35.

[0076] According to the fourth invention of the present invention, by installing the roller shutter 34 in a position further forward than the rearview mirror 35, the light-blocking area of ​​the roller shutter 34 can be expanded without compromising the visibility of the rearview mirror 35.

[0077] The fifth invention is that in the work vehicle of the first invention, the monitor 36 installed on the right side of the front frame 18 in front of the cab 7 is positioned opposite the front window glass FG, and the roller shutter 34 is positioned behind the front window glass FG and in front of the monitor 36.

[0078] According to the fifth invention of the present invention, the work vehicle can expand the light-blocking area of ​​the roller shutter 34 without compromising the visibility of the monitor 36 by installing the roller shutter 34 in a position that is forward of the monitor 36.

[0079] The sixth invention of the present invention is that, in the work vehicle of the fourth or fifth invention of the present invention, the operating part 34b of the roller shutter 34 is disposed on the opposite side in the left-right direction relative to the rearview mirror 35 or the monitor 36.

[0080] According to the sixth invention of the present invention, the rearview mirror 35 and the monitor 36 will not become obstacles when operating the operating component 34b.

Claims

1. A work vehicle, wherein a driver's seat (8) is provided in the cab (7), characterized in that, The vehicle has a convex-shaped portion that protrudes downward from at least a portion of the lower part of the roof (14) that forms the upper part of the interior space of the cab (7), such that the upper end of the roller blind (34) that blocks glare from the front is positioned above the lower end of the convex-shaped portion of the roof (14).

2. The working vehicle according to claim 1, characterized in that, A bracket (33L, 33R) for supporting the roller shutter (34) is provided at a position further outward than the air outlet (31) of the air conditioner (30) located at the top of the cab (7) in the left-right direction.

3. The operating vehicle according to claim 2, characterized in that, Air outlets (31) are provided on the left and right sides of the convex part, and left and right brackets (33L, 33R) supporting the roller shutter (34) are provided at a position further outward than the left and right air outlets (31, 31).

4. The working vehicle according to claim 1, characterized in that, The rearview mirror (35) installed on the front frame (18) in front of the cab (7) is positioned behind the front window glass (FG), and the roller shutter (34) is positioned further back than the front window glass (FG) and further forward than the rearview mirror (35).

5. The operating vehicle according to claim 1, characterized in that, The monitor (36) installed on the front frame (18) on the left and right sides in front of the cab (7) is positioned behind the front windshield (FG), and the roller shutter (34) is positioned further behind the front windshield (FG) and further forward than the monitor (36).

6. The operating vehicle according to claim 4 or 5, characterized in that, The operating components (34b) of the roller shutter (34) are located on the opposite side in the left and right directions, relative to the rearview mirror (35) or monitor (36) located on the left and right sides in front of the cab (7).

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