Work vehicles

Abstract

To prevent a hood cover for covering the upper surface of a roof from interfering with components near the roof.SOLUTION: A traveling vehicle body 1 includes a cabin 16 surrounding a driver's seat 7 portion. Hook-locking tools 60R, 60L for lifting the cabin 16 are provided on right and left rear support posts 20R, 20L of the cabin 16. Rear base stays 63R, 63L are formed on the right and left hook-locking tools 60R, 60L, respectively. The cabin 16 includes a roof 22 formed such that a rear part thereof protrudes rearward from the rear support posts 20R, 20L. A rear obstacle sensor 67 is provided at the rear part of the roof 22. A rear pipe frame 51 is provided between the right and left rear base stays 63R, 63L. The rear pipe frame 51 is formed substantially along a rear edge of the roof in plan view and is located above and behind the roof 22. The rear edge is located behind the rear obstacle sensor 67 in plan view.SELECTED DRAWING: Figure 12

Description

[Technical Field]

[0001] The present invention relates to a work vehicle such as an agricultural tractor, and more particularly to a protective structure for a communication control unit or the like disposed on the upper surface of a cabin roof of the vehicle. [Background technology]

[0002] A known work vehicle has a communication control unit mounted on the roof of the cabin that encloses the driver's seat, a guard that surrounds the communication control unit from above, and a cover that can protect the communication control unit from above (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-196319 Summary of the Invention [Problem to be solved by the invention]

[0004] With this configuration, the guard member protects the communication control unit and prevents damage. However, in recent years, with the increasing number of multi-functional work vehicles, the number of parts mounted on the roof has also increased, and it has become difficult to cover the roof. There was a risk of unexpected interference .

[0005] The present invention provides For parts installed near the roof, To prevent unexpected interference of a hood cover that covers a vehicle to protect it from dust and rainwater. [Means for solving the problem]

[0006] The present invention provides the following technical means to solve the above problems.

[0007] The work vehicle according to the present invention comprises: The vehicle body (1) is equipped with a cabin (16) surrounding the driver's seat (7). The cabin (16) On the left and right rear support columns (20L, 20R) The aforementioned Hook locking devices (60L, 60R) for lifting the cabin (16) are provided, and rear base stays (63L, 63R) are respectively configured on the left and right hook locking devices (60L, 60R), The cabin (16) includes a roof (22) formed so that its rear portion projects rearward beyond the rear support columns (20L, 20R), a rear obstacle sensor (67) is provided at the rear of the roof (22), and a rear pipe frame (51) is provided between the left and right rear base stays (63L, 63R), the rear pipe frame (51) is formed so as to substantially follow the rear edge of the roof in a plan view, and is positioned rearward and above the roof (22), and the rear edge is positioned rearward of the rear obstacle sensor (67) in a plan view. . [Effects of the Invention]

[0008] The work vehicle according to the present invention can prevent unexpected interference of the hood cover, which covers the components provided near the roof to protect them from dust and rainwater, with the components. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a side view of a tractor according to an embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. 2 is a perspective view of the cabin of the tractor as viewed from above and in front. [Figure 4] FIG. 2 is a perspective view of the cabin of the tractor as viewed from below and in front. [Figure 5] FIG. 2 is a perspective view of the roof of the tractor as viewed from diagonally above the front. [Figure 6] FIG. 2 is a perspective view of the roof of the tractor as viewed from diagonally above and behind. [Figure 7] FIG. 2 is a side view of the front upper part of the cabin of the tractor. [Figure 8] FIG. 2 is a perspective view showing a status indicator light and its support structure on the right side of the tractor body. [Figure 9] FIG. 2 is a perspective view showing a status indicator light and its support structure on the left side of the vehicle body of the tractor. [Figure 10] FIG. 1 is a perspective view of the positioning unit, communication control unit, and support structure of the tractor, seen from diagonally behind. [Figure 11] FIG. 2 is a perspective view of the cabin of the tractor mounted on the pipe frame, as viewed from above and in front. [Figure 12] FIG. 2 is a side view of the cabin of the tractor with the pipe frame attached. [Figure 13] FIG. 2 is a plan view of the cabin of the tractor with the pipe frame attached. [Figure 14]FIG. 2 is an exploded perspective view of the front base stay and its surroundings of the same tractor. [Figure 15] FIG. 2 is a side view of the rear base stay and its surroundings of the same tractor, with a portion thereof cut away. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. When referring to a pair of left and right components, the left side of the vehicle body 1 will be designated by L and the right side by R, and in some cases, L and R will be omitted.

[0011] 1 to 11 show a tractor. A diesel engine E is mounted inside a hood 2 at the front of a vehicle body 1. The rotational power of the engine E is transmitted to a transmission in a transmission case 3, which then reduces the speed and transmits the rotational power to front wheels 4 and rear wheels 5. A steering wheel 6 for steering the front wheels 4 is mounted behind the engine E, and a driver's seat 7 is located behind the steering wheel 6. A hydraulic cylinder case 8 is mounted at the upper rear of the transmission case 3, and lift arms 9, which form part of a hydraulic lifting mechanism, are rotatably attached to both the left and right sides of the cylinder case 8. The lift arms 9 move up and down by the extension and contraction of lifting hydraulic cylinders 10. A three-point link mechanism consisting of a top link 11 and left and right lower links 12 is mounted at the rear of the vehicle body. A rotary work machine R is attached to this link mechanism, and the lower links 12 are connected to the lift arms 9 via lift rods 13, allowing the work machine R to be raised and lowered.

[0012] The steering wheel 6, driver's seat 7, etc. are covered by a cabin 16. The cabin 16 is fixed to the vehicle body via an elastic member such as vibration-isolating rubber, making it difficult for vibrations of the vehicle body to be transmitted to the cabin 16.

[0013] The cabin 16 is an integrated framework structure consisting of a floor 17, front pillars 18 erected at the front left and right parts of the floor 17, rear pillars 20 erected at the rear left and right parts of the driver's seat 7, intermediate pillars 62 erected at the middle part of the left and right fenders 19, and an upper frame 21 connecting the upper ends of these pillars, and is covered with a roof 22.

[0014] The roof 22 of the cabin 16 is equipped with driving support devices such as a surveillance camera, obstacle sensors, a positioning controller, and a camera controller. The mounting configuration of these devices will be described in detail below. The surveillance camera 23 captures images of the front, rear, and sides of the tractor body and acquires the image data. The positioning controller 25, which serves as a positioning unit, transmits and outputs information for calculating the position of the body to a control unit C equipped on the body 1 via a camera controller 27, which serves as a communication control unit that communicates with a communication terminal. The obstacle sensor 24 is, for example, an infrared sensor and can detect obstacles in front of or behind the body. In this embodiment, the camera controller 27 is used as an example of a communication control unit, but it may be replaced by a controller that calculates and controls sensor information from various parts of the body 1.

[0015] The positioning controller 25 includes a positioning antenna (not shown), a base station (not shown) information receiving antenna 26, a calculation unit (not shown), and an output unit (not shown), and acquires satellite signals from GPS satellites and the like using the positioning antenna, and calculates the vehicle's position information, traveling direction, and the like by processing the satellite signals and correction signals received from the base station by the antenna 26 in the calculation unit. This position information, etc. is transmitted to the control unit C by the output unit.

[0016] The camera controller 27 is also configured to include a calculation unit that processes the image data captured by the monitoring camera 23, a transmission circuit (not shown) that transmits the calculation results, and multiple (two in the illustrated example) communication antennas 28. The calculation results of the image data are transmitted to a control unit C mounted on the vehicle body 1.

[0017] In addition, the location information and image data, etc. sent to the control unit C can be configured to be sent to an external management server, and by providing a communication terminal (e.g., a portable terminal) that can communicate with this management server, it is possible to obtain information about the vehicle body 1 using this communication terminal, check the vehicle body condition, or remotely control the vehicle body 1.

[0018] The housing 27a housing the camera controller 27 and the housing 25a housing the calculation unit and the like of the positioning controller 25 are disposed above the front side of the roof 22. That is, a band-shaped front frame 31 is provided which is supported in a horizontal position so as to span between bracket members 30L, 30R fixed to the front support pillar 18 or the upper frame 21, and the housing 27a of the camera controller and the housing 25a of the positioning controller 25 are disposed and fixed in the front-rear direction at the middle of the left and right sides of the front frame 31. The front frame 31 is disposed so as to be located slightly forward of the upper end of the windshield 38 in a side view of the vehicle body 1.

[0019] Specifically, a forward protruding frame 32f that is U-shaped in plan view is fixed to the front wall of the center portion of the front frame 31, and a similarly U-shaped but somewhat long rearward protruding frame 32r is fixed to the rear wall, and flat plates 32a are fixed to the upper surfaces of the front and rear protruding bodies 32f, 32r, thereby forming a control unit bracket 32 ​​that straddles the front and rear of the front frame 31. Then, the housing 27a of the camera controller 27 and the housing 25a of the positioning controller 25 are fixed to the upper surface of this control unit bracket 32, with the housing 27a at the front position and the housing 25a at the rear position, respectively, in a front-to-rear arrangement. For example, flanges formed on the housings are overlapped with the control unit bracket 32, and the overlapping points are fastened with bolts.

[0020] Antenna guards 33L, 33R are provided on the left and right sides of the control unit bracket 32 ​​as protective frames. Specifically, each of the antenna guards 33L, 33Rf is formed into a U-shape from a round bar. The lower ends of the front legs 33Lf, 33Rf are inserted into small receiving portions 34L, 34R that are fixed to the upper end of the front frame 31 and protrude forward, and are then secured with nuts or the like. Meanwhile, the rear legs 33Lr, 33Rr of the antenna guards 33L, 33R are positioned close to and in contact with the upper surface of the cabin roof 22, and shock-absorbing rubber 35 is attached to their lower ends. Specifically, cylindrical rubber 35L, 35R is inserted into the lower ends of the rear legs 33Lr, 33Rr. This configuration prevents damage to the upper surface of the cabin roof 22 even if the antenna guards 33L, 33R are pressed against the cabin roof 22 by vehicle vibration or external force. The antenna guards 33L and 33R are set to a height equal to or greater than the height of the antenna 26 of the positioning controller 25 and the height of the communication antennas 28 of the camera controller 27. They are positioned slightly wider than the left-right width of the housing 25a of the positioning controller 25 and the housing 27a of the camera controller 27, and slightly higher than the antennas 26, 28, 28, so that the housings 25a and 27a and the antennas 26, 28, 28 can be protected.

[0021] In a side view, the antenna guards 33L, 33R are positioned so as to overlap with the antenna 26 of the positioning controller 25 and the communication antennas 28, 28 of the camera controller 27, and can protect the antenna 26 when the hood member that covers the vehicle body to protect it from wind and rain is put on or removed, reducing the risk of unexpected interference and damage.

[0022] Since the positioning controller 25 and the camera controller 27 are arranged close to each other in the front and rear, the harnesses 36 can be bundled and arranged along the rear wall surface of the front frame 31, thereby facilitating the wiring work and improving the neatness of the finished product.

[0023] A front camera 23f capable of capturing images in front of the vehicle body 1 is disposed on the front side of the front frame 31. That is, a pair of camera brackets 37 are provided in the center of the front side of the front frame 31, and the camera body is provided so that the imaging angle can be adjusted up and down. Therefore, the front camera 23f can be protected by the control unit bracket 32 ​​and camera controller 27 located above. Note that the positioning controller 25 as a positioning unit and the camera controller 27 as a communication control unit can be disposed in reverse order, but when the positioning controller 25 is disposed in the front position, it can be protected by the control unit bracket 32 ​​and positioning controller 25.

[0024] At the rear end of the control unit bracket 32, flat plates 32a are fixed to the upper surfaces of the front and rear protrusions 32f, 32r so as to maintain a constant gap between the bracket and the cabin roof 22. However, since there is a risk that the bracket 32 ​​may swing back and forth around the point of contact with the front frame 31, measures have been taken to prevent damage due to contact with the roof 22. That is, a buffer material 38 is provided below the rear end of the control unit bracket 32. With this configuration, vibrations transmitted from the roof 22 of the cabin 16 can be suppressed, preventing damage due to contact with the roof 22.

[0025] Next, we will explain the installation configuration of the status indicator lights 40 that indicate the status of the autonomous driving vehicle 1 when it is configured to be capable of autonomous driving. The status indicator lights 40 are stacked and can illuminate in different warning colors. The status of the autonomous driving vehicle 1 can be distinguished using various lighting methods, such as green for normal operation, red for abnormality, yellow for obstacle detection, and flashing for vehicle stop. The status indicator lights 40 are located on the left and right sides of the front of the cabin 16. Specifically, a support seat bracket 42 is fixed to an indicator light bracket 41 on the front support column 18 of the cabin 16, and the status indicator lights 40 are fixed in an upright position on the support seat bracket 42. The status indicator lights 40 fixed to the support seat plate 42 are positioned on the opposite side of the front support column 18 from the head position of the operator seated in the driver's seat 7. During normal driving performed by the operator, the indicator lights 40 can be hidden by the front support column 18 without obstructing the operator's field of vision.

[0026] The indicator light bracket 41 is fixed to the front support column 16 by welding or the like, but the angle of the support seat bracket 42 relative to the indicator light bracket 41 is adjustable. Specifically, the indicator light bracket 41 is detachably fastened to the indicator light bracket 41 at two locations using a combination of bolts 43 and nuts 44. One of the two locations, 43a and 44a, can be repositioned and fastened around the other location, 43b and 44b, along an arc-shaped guide hole 41a formed in the indicator light bracket 41. Therefore, the angle of the support seat plate 42 and the status indicator light 40 can be adjusted so that they can be tilted rearward together, allowing them to be switched between an upright working position and a tilted storable position (Figure 7). The height of the support seat bracket 42 and the rotation angle of the status indicator light 40 are set (designed) so that the indicator light 40 protrudes above the cabin roof 22 in the upright working position and does not protrude above the cabin roof 22 in the tilted storable position. By keeping the vehicle in the stored position when not traveling, such as when stored in a barn, space in the storage barn can be saved, and further, when the entire vehicle body is covered, if the status indicator light 40 is in the upright position, a load is applied and it is likely to be damaged, but if it is in the lying-down stored position, the load can be reduced and damage can be prevented.

[0027] The status indicator light 40 in the stored position is set to be located above the upper end of the cabin door 39 and below the cabin roof 22 (Fig. 7). Therefore, even when the status indicator light 40 is in the stored position, the cabin door 39 can be opened and closed, and there is no interference with raising and lowering.

[0028] As mentioned above, the support seat bracket 42 is fastened to the indicator light bracket 41 at two points by bolts 43 and nuts 44 so that it can be attached and detached freely. One of these points 43a, 44a can be fastened by changing its position arbitrarily around the other point 43b, 44b along the arc-shaped guide hole 41a formed in the indicator light bracket 41, so that the position can be easily changed by loosening one bolt 43b.

[0029] The support seat brackets are arranged on the left and right, and side cameras 23s, which are one of the surveillance cameras 23, are arranged on the lower outer surfaces of the left and right support seat brackets 42L, 42R via camera brackets 45L, 45R. The side cameras 23s, 23s are provided so that their angles can be adjusted up and down relative to the camera brackets 45L, 45R.

[0030] A bracket 46 for a side mirror is provided on the front support pillar 18 of the cabin 16, below the indicator light bracket 41 that supports the indicator light 40, and a stay 48 having a side mirror 47 is attached to the front end of this bracket 45 so that it can be rotated freely around a vertical axis.

[0031] The status indicator light 40 is set in a relationship in which the upper end of the status indicator light 40 in the upright position is lower than the height of the antenna guard 33, and the entire status indicator light 40 in the upright position is located inside the vehicle body more than the side mirror 47. With this configuration, when the vehicle body is covered, the load can be distributed between the antenna guard 33 and the side mirror 47, and the load on the status indicator light 40 can be reduced even when the status indicator light 40 is in the upright position during work.

[0032] In addition, the side camera 23s is located inside the vehicle body 1 more than the side mirror 47 fixed to the front support 18 of the cabin 16 and lower than the status indicator light 40, so that the side camera 23s can be protected by the status indicator light 40 and the side mirror 47.

[0033] The configurations of the left and right pipe frames 50L, 50R and the rear pipe frame 51, which are provided to avoid interference with the hood sheet that covers the entire vehicle body and to protect the housing 25a that houses the calculation unit etc. of the positioning controller 25, the antenna 26, the housing 27a that houses the calculation unit etc. of the camera controller 27, and the communication antenna 28 from dust and rainwater, will be described with reference to Figures 12 to 15.

[0034] As described above, side mirror brackets 46L, 46R are provided on the left and right front support pillars 18L, 18R of the cabin 16 to mount side mirrors 47L, 47R. Mirror stays 48L, 48R extend from the side mirror brackets 46L, 46L to be rotatable about a vertical pivot point, and the side mirrors 47L, 47R are supported in a suspended manner at the distal ends of the mirror stays 48L, 48R. Front base stays 53L, 53R, which are L-shaped members to which pipe insertion cylinders 52 are fixed, are fixed to vertical flat plate portions 46aL, 46aR of the side mirror brackets 46L, 46R. Specifically, the vertical flat plate portions 46aL, 46aR are sandwiched and fixed by inner stays 54 that face the vertical plate portions of the front base stays 53L, 53R. That is, the vertical plate portions of the front base stays 53L, 53R and the opposing inner stays 54 are arranged at a constant interval by tubes 55 and small bolts 56, and the two are fastened together in a sandwiched state while passing through the side mirror brackets 46L, 46R by knob bolts 57. A vertically oriented pipe material can be passed through the pipe insertion cylinder 52.

[0035] Meanwhile, the left and right rear struts 20L, 20R of the cabin 16 are equipped with hook fasteners 60L, 60R for lifting the cabin 16. These hook fasteners 60L, 60R are configured as flat plate members with appropriate thickness and strength, which are welded and fixed to the upper ends of the rear struts 20L, 20R in a lateral protruding shape and have notches 60a for engaging hooks (not shown). Rear base stays 63L, 63R, each equipped with pipe insertion cylinders 61 and 62 at two locations, front and rear, are fixed to the left and right hook fasteners 60L, 60R. Specifically, the rear base stays 63L, 63R are formed by a framework of multiple upper and lower plate members (three in the illustrated example) spaced apart at an appropriate interval, and the front pipe insertion cylinder 61 is configured by fixing a plate member through the top and bottom, allowing a vertically oriented pipe to be inserted therethrough. Similarly, the pipe insertion cylinder 62 provided on the rear side is also configured to allow a vertically oriented pipe to be inserted therethrough.

[0036] The rear base stays 63L, 63R are placed on the hook fasteners 60L, 60R and fastened with knob bolts 64. Reference numeral 65 denotes a positioning pin. Like the cylinder 52, the cylinders 61, 62 can be passed through by a vertically oriented pipe material.

[0037] Left and right pipe frames 50L, 50R, which are inverted U-shaped in side view, are attached between the cylinders 52 of the front base stays 53L, 53R and the front pipe insertion cylinders 61 of the rear base stays 63L, 63R. The vertical portions 50a, 50b are inserted from above into the cylinders 52 of the front base stay 53L and the front pipe insertion cylinders 61 of the rear base stays 63L, 63R. Each vertical portion 50a, 50b has flanges 50c, 50d that define the pipe insertion position.

[0038] The rear portion of the roof 22 is formed to protrude rearward beyond the rear support pillars 20 to improve the design and to provide space for installing an air conditioning unit. A rear monitoring camera 23r is mounted on the underside of the rear end protruding portion 22a of the roof 22 using a camera bracket 65 so that the downward angle can be adjusted and facing rearward, and a rear obstacle sensor 67 is mounted using a sensor bracket 66. The rear surface of the rear obstacle sensor 67 is surrounded by the license plate mounting base plate 68. The obstacle sensor 67 is configured to be positioned higher than the rear obstacle sensor 67 and the rear monitoring camera 23r, so it can be placed without interfering with imaging by the monitoring camera 23r.

[0039] The rear pipe frame 51 is formed so as to substantially follow the rear edge of the roof in a plan view. It is inserted through the cylinders 62 provided on the rear sides of the left and right rear base stays 63L, 63R and is positioned above and rearward of the roof 22. Its rear edge is positioned rearward of the rear obstacle sensor 67 in a plan view. Furthermore, the rear pipe frame 51 is provided in an inclined position (angle α in FIG. 12 ) so that it rises higher toward the rear in a side view. Therefore, the rear pipe frame 51 can protect the rear obstacle sensor 67 and the rear monitoring camera 23r. Furthermore, the left and right vertical portions 51a of the rear pipe frame 51 are inserted and fixed from above into the rear pipe insertion cylinders 62L, 62R of the rear base stays 63L, 63R, and the rear is inclined upward. Therefore, the rear obstacle sensor 67 and the rear monitoring camera 23r can be protected even when the top cover is attached and the rear is bent. The vertical portion 51a has a flange 51b for positioning the pipe insertion.

[0040] Cotter pin insertion holes 50e and 51e are provided in the lower ends of the vertical portions 50a, 50b and 51a of the left and right pipe frames 50L and 50R and the rear pipe frame 51. With this configuration, it is possible to prevent accidental removal of the cotter pin by inserting it.

[0041] In the above embodiment, the positioning controller 25 or the camera controller 27 is used as an example of a communication control unit, but the present invention can be applied to any control unit or the like disposed on the upper surface of the roof 22. [Explanation of symbols]

[0042] 1 Running vehicle 7 Driver's seat 16 Cabins 18 Front post 20 Rear strut 40 Status indicator light 41 Indicator light bracket 46 Side mirror bracket 47 Side mirror 50 Left and right pipe frames 51 Rear pipe frame 53 Front base stay 60 Hook fastener 63 Rear base stay 67 Rear Obstacle Sensor

Claims

1. The vehicle body (1) is provided with a cabin (16) surrounding a driver's seat (7), Hook locking devices (60L, 60R) for lifting the cabin (16) are provided on the left and right rear struts (20L, 20R) of the cabin (16), The left and right hook fasteners (60L, 60R) are each provided with a rear base stay (63L, 63R), The cabin (16) includes a roof (22) formed so that a rear portion thereof projects rearward beyond the rear support pillars (20L, 20R), A rear obstacle sensor (67) is provided at the rear of the roof (22), a rear pipe frame (51) is provided between the left and right rear base stays (63L, 63R); The rear pipe frame (51) is formed so as to roughly follow the rear edge of the roof in a plan view, is positioned rearward and above the roof (22), and the rear edge is positioned rearward of the rear obstacle sensor (67) in a plan view.

2. A work vehicle as described in Claim 1, wherein the rear pipe frame (51) has its U-shaped ends fixed to the left and right rear base stays (63L, 63R) and is inclined so that it becomes higher as it approaches the rear when viewed from the side.

3. A work vehicle as described in Claim 2, wherein the rear base stays (63L, 63R) are attached by inserting the U-shaped end of the rear pipe frame (51) into a pipe insertion cylinder (62) that is formed by fixing a plurality of upper and lower plate members at appropriate intervals and that is provided with the plate members fixed in a penetrating manner from top to bottom.

4. A status indicator light (40) is provided in the cabin (16) to indicate the status of the running vehicle body (1) via an indicator light bracket (41), The status indicator light (40) is provided so as to be changeable between a working position in which it projects above the roof (22) and a storage position in which it does not project above the cabin roof (22), Side mirror brackets (46L, 46R) for attaching side mirrors (47L, 47R) are provided on left and right front support pillars (18L, 18R) of the cabin (16), The left and right side mirror brackets (46L, 46R) are provided with front base stays (53L, 53R), The rear base stays (63L, 63R) include a rear pipe insertion cylinder (62) and a front pipe insertion cylinder (61), A left and right pipe frame (50L, 50R) is provided between the front base stay (53L, 53R) and the front pipe insertion cylinder (61).

4. The work vehicle according to claim 3, wherein the left and right pipe frames (50L, 50R) are positioned higher than the upper surface of the roof (22) of the cabin (16) and further outward than a status indicator light (40) for indicating the lying-down storage position.

Images