Work vehicle

Abstract

To provide a work vehicle capable of enhancing the workability of a maintenance, etc., by a worker.SOLUTION: A work vehicle includes: a weight support unit 60 which is provided at the front section of a vehicle body, and which supports a weight member; a front-side radar unit 100F capable of detecting an object to be detected located at the forehead side of the vehicle body; and a support member 200 which is fastened on an upper surface 61 of the weight support unit 60, and which supports the front-side radar unit 100F.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to the technology of work vehicles.

Background Art

[0002] Conventionally, the technology of work vehicles equipped with detection devices capable of detecting surrounding obstacles and the like is known. For example, it is as described in Patent Document 1.

[0003] Patent Document 1 discloses a work vehicle including a weight bracket that supports a front weight, a detection device capable of detecting an obstacle, and a sensor bracket that is fixed to the weight bracket and supports the detection device. In the technology described in Patent Document 1, the sensor brackets are fixed to the left and right side surfaces of the weight bracket.

[0004] Here, in the front part (near the bonnet) of the work vehicle, it is assumed that various operations (for example, opening and closing of the bonnet, battery maintenance, etc.) are performed by the operator from the left and right sides of the vehicle. On the other hand, as described in Patent Document 1, if the sensor brackets are fixed to the left and right side surfaces of the weight bracket, the sensor brackets may interfere with the operations by the operator, and the workability may be reduced.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] One aspect of the present disclosure has been made in view of the above - described situation, and the problem to be solved is to provide a work vehicle capable of improving the workability of operations such as maintenance by an operator.

Means for Solving the Problems

[0007] The problem to be solved by one aspect of the present disclosure is as described above, and next, means for solving this problem will be described.

[0008] A work vehicle according to one aspect of the present disclosure includes a weight support portion provided at the front portion of the vehicle body for supporting a weight member, a front detection portion capable of detecting a detection target in front of the vehicle body, and a support member fixed to the upper surface of the weight support portion for supporting the front detection portion. According to one aspect of the present disclosure, workability such as maintenance by an operator can be improved.

[0009] The support member according to one aspect of the present disclosure is formed in a hollow shape. According to one aspect of the present disclosure, various components can be accommodated inside.

[0010] The support member according to one aspect of the present disclosure includes a front side member forming the front side surface of the support member and a rear side member forming the rear side surface of the support member. According to one aspect of the present disclosure, the support member can have a simple configuration.

[0011] The left and right side surfaces of the support member according to one aspect of the present disclosure are integrally formed with either one of the front side member and the rear side member. According to one aspect of the present disclosure, the support member can have a simple configuration.

[0012] The support member according to one aspect of the present disclosure includes a first portion in which the left - right width gradually narrows from bottom to top. According to one aspect of the present disclosure, the rigidity of the lower part of the support member can be improved to suppress the vibration of the front detection portion. Also, by narrowing the left - right width of the upper part of the support member, it is possible to make it difficult to obstruct the light irradiated from a headlight or the like.

[0013] The support member according to one aspect of the present disclosure includes a second portion formed above the first portion and having a gradually increasing left-right width from bottom to top. According to one aspect of the present disclosure, by widening the left-right width at the upper part of the second portion, a wider portion (the upper part of the support member) for attaching the front detection unit can be secured.

[0014] The front detection unit according to one aspect of the present disclosure is supported by the support member such that the attachment angle to the support member can be changed. According to one aspect of the present disclosure, by adjusting the angle of the front detection unit, detection of a detection target in front of the vehicle body can be suitably performed.

[0015] An opening penetrating the support member in the front-rear direction is formed in the support member according to one aspect of the present disclosure. According to one aspect of the present disclosure, air can be easily taken into the inside of the bonnet through the opening.

[0016] A hitch pin holding portion capable of holding a hitch pin is formed in the weight support portion according to one aspect of the present disclosure, and the opening is formed at a position overlapping the hitch pin holding portion in the downward direction. According to one aspect of the present disclosure, it is possible to prevent the hitch pin from interfering with the support member when inserting and removing the hitch pin.

[0017] The support member according to one aspect of the present disclosure includes a partition portion partitioning the internal space of the support member and the opening. According to one aspect of the present disclosure, it is possible to suppress rainwater, sand, dust, etc. from entering the internal space of the support member from the opening.

[0018] The front side surface of the support member according to one aspect of the present disclosure includes a first standing surface, a second standing surface formed above the first standing surface and inclined forward from the first standing surface, and a third standing surface formed above the second standing surface and parallel to the first standing surface. According to one aspect of the present disclosure, a space for arranging a weight member can be secured below the front surface of the support member.

[0019] The support member according to one aspect of the present disclosure is arranged between the left and right headlamps in a front view. According to one aspect of the present disclosure, it is possible to suppress the inhibition of the light irradiated forward from the headlamp.

[0020] The support member according to one aspect of the present disclosure is arranged between the left and right work lamps in a front view. According to one aspect of the present disclosure, it is possible to suppress the inhibition of the light irradiated forward from the work lamp.

[0021] At least one of the front detection unit and the support member according to one aspect of the present disclosure includes a reference portion that serves as a reference for the orientation of the vehicle body. According to one aspect of the present disclosure, the orientation of the vehicle body of the work vehicle can be easily grasped.

Effect of the Invention

[0022] According to one aspect of the present disclosure, it is possible to improve the workability of operations such as maintenance by the operator.

Brief Description of the Drawings

[0023]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0024] Hereinafter, the directions indicated by the arrows U, D, F, B, L, and R in the drawings will be defined as the upward direction, downward direction, forward direction, backward direction, left direction, and right direction, respectively, and the description will be given.

[0025] First, the overall configuration of the tractor 1 according to one aspect of the present disclosure will be described.

[0026] The tractor 1 shown in FIG. 1 mainly includes a body frame 2, an engine 3, a bonnet 4, a transmission case 5, front wheels 6, rear wheels 7, fenders 8, a lifting device 9, a cabin 10, a seat 20, a steering wheel 21, and the like.

[0027] The body frame 2 is a frame-shaped member formed by appropriately combining a plurality of plate materials. The body frame 2 is formed in a substantially rectangular shape in plan view. The body frame 2 is disposed at the front portion of the tractor 1 with its longitudinal direction oriented in the front-rear direction. An engine 3 is fixed to the rear portion of the body frame 2. The engine 3 is covered with a bonnet 4. A transmission case 5 is fixed to the rear portion of the engine 3. A muffler 4a for discharging the exhaust gas of the engine 3 is disposed on the right side of the bonnet 4.

[0028] Also, as shown in FIG. 2, a work lamp 4b and a headlamp 4c are provided on the front surface of the bonnet 4. The work lamp 4b and the headlamp 4c are provided on both left and right sides of the front surface of the bonnet 4 at intervals in the left-right direction. Further, a mesh portion with innumerable small holes is appropriately formed on the bonnet 4. Thereby, air can be taken from the outside to the inside of the bonnet 4 to cool the engine 3 and the like.

[0029] Also, as shown in FIG. 3, a battery 17 and a bonnet lock mechanism 18 are provided inside the bonnet 4. The battery 17 is placed near the front end of the body frame 2. The bonnet lock mechanism 18 is disposed in front of the battery 17. The bonnet lock mechanism 18 can hold the bonnet 4 in a closed state. By releasing the holding of the bonnet 4 by the bonnet lock mechanism 18, the bonnet 4 can be rotated upward to open the inside of the bonnet 4.

[0030] As shown in FIG. 1, a weight support portion 60 for supporting a weight member is provided at the front end of the body frame 2. The front portion of the body frame 2 is supported by a pair of left and right front wheels 6 via a front axle mechanism (not shown). The rear portion of the transmission case 5 is supported by a pair of left and right rear wheels 7 via a rear axle mechanism (not shown). The pair of left and right rear wheels 7 are generally covered by the fender 8 from above.

[0031] An elevating device 9 is provided at the rear of the transmission case 5. Various working devices (for example, a tillage tractor, etc.) can be mounted on the elevating device 9. The elevating device 9 can raise and lower the mounted working device by an actuator such as a hydraulic cylinder. The power of the engine 3 can be transmitted to the elevating device 9 via a PTO shaft (not shown).

[0032] The power of the engine 3 is transmitted to the front wheels 6 via the front axle mechanism and to the rear wheels 7 via the rear axle mechanism after being shifted by a transmission (not shown) housed in the transmission case 5. The front wheels 6 and the rear wheels 7 are rotationally driven by the power of the engine 3, and the tractor 1 can travel. Also, the power of the engine 3 can drive a working device mounted on the lifting device 9.

[0033] A cabin 10 is provided behind the engine 3. The cabin 10 is placed on the vehicle body (such as the transmission case 5). Inside the cabin 10, a living space for the driver to board is formed.

[0034] The cabin 10 includes a front pillar 12 that supports the front part of the roof 11, a rear pillar 13 that supports the rear part of the roof 11, and a center pillar 14 that supports the substantially central part (intermediate part) in the front-rear direction of the roof 11. Each of the above pillars is provided so as to be located on both the left and right sides of the cabin 10. The cabin 10 also includes a beam (not shown) that connects the upper ends of the front pillar 12, the rear pillar 13, and the center pillar 14.

[0035] The roof 11, the front pillar 12, the rear pillar 13, the center pillar 14, and the beam are formed in a hollow shape. The roof 11, each pillar, and the beam can have wiring connected to equipment provided on the tractor 1 (such as the radar unit 100 described later) inserted through their internal spaces.

[0036] As shown in FIG. 1, a seat 20 for the driver to sit on is arranged substantially at the center of the cabin 10. Also, the cabin 10 is provided with an auxiliary step 20a for getting on and off the seat 20. Further, a steering wheel 21 for adjusting the turning angle of the front wheels 6 is arranged at the front of the cabin 10.

[0037] In addition, the tractor 1 is equipped with a position detection device 30 capable of detecting the position of the vehicle body, cameras (front camera 51, side cameras 52, and rear camera 53) capable of imaging the surroundings of the vehicle body, and a radar unit 100 capable of detecting detection targets around the vehicle body.

[0038] The position detection device 30 is a device capable of detecting the position of the vehicle body (position information including latitude and longitude) by using a satellite positioning system (GNSS) such as GPS and various sensors. The position detection device 30 has appropriate receiving means for receiving satellite signals transmitted from satellites.

[0039] The position detection device 30 is supported by a support mechanism 40 attached to the cab 10. The support mechanism 40 is arranged so as to extend across the left and right front pillars 12. The support mechanism 40 is arranged so as to be located in front of the roof 11. Further, the support mechanism 40 is provided so as to be rotatable with respect to the left and right front pillars 12 around a central axis facing in the left - right direction via left and right connecting portions. Note that the support mechanism 40 may be fixedly provided so as not to be rotatable with respect to the left and right front pillars 12. The position detection device 30 is arranged approximately at the center in the left - right direction of the tractor 1.

[0040] Cameras (front camera 51, side cameras 52, and rear camera 53) are provided in plural (five in this embodiment) with respect to the cab 10. Specifically, a front camera 51 is provided at the front part of the cab 10. A pair of left and right side cameras 52 are provided at both left and right side portions of the cab 10. A pair of left and right rear cameras 53 are provided at the rear part of the cab 10.

[0041] Each camera is arranged so as to face generally obliquely downward at about 45 degrees with respect to the horizontal ground. By unifying the angles in this way, it is possible to improve the ranging performance of each camera and to optimize the field of view of each camera.

[0042] By using each of the above cameras, it is possible to image the front, both left and right sides, and the rear of the tractor 1 respectively. The tractor 1 can control the operation of the vehicle body based on the images captured by each camera. For example, based on the images captured by each camera, the human figure can be learned, and when a person approaches near the tractor 1 from the imaging results of each camera, control can be performed to stop the tractor 1. Note that the uses of each camera are not limited to this, and the captured images can be used for various purposes.

[0043] The radar unit 100 can detect detection targets around the vehicle body using radio waves (for example, millimeter waves). Examples of the above detection targets include structures formed of metal or concrete, other vehicles, people, etc. The radar unit 50 is provided with a sensor (for example, a millimeter wave sensor) that irradiates radio waves and detects the detection target by receiving the radio waves reflected by the detection target.

[0044] In the present embodiment, a plurality (four) of radar units 100 (front side radar unit 100F, rear side radar unit 100B, a pair of left and right side radar units 100S) are provided on the tractor 1. Specifically, the front side radar unit 100F is provided at the front part of the bonnet 4 of the tractor 1. Also, the rear side radar unit 100B is provided at the rear part of the cabin 10. Also, side radar units 100S are respectively provided on both left and right sides of the cabin 10 (left and right front pillars 12).

[0045] The front side radar unit 100F is arranged in front of the bonnet 4 via a support member 200 described later. The rear side radar unit 100B is provided at the rear part of the cabin 10 (roof 11). The side radar unit 100S is provided on both left and right sides of the cabin 10 (left and right front pillars 12).

[0046] The above-described position detection device 30, cameras (front camera 51, side camera 52, and rear camera 53), and radar unit 100 are communicably connected via wiring to an appropriate control device capable of controlling the travel of the tractor 1. The control device can detect the position information of the vehicle body based on the GNSS signal received by the position detection device 30. Further, the control device can execute control for automatically driving the tractor 1 (automatic driving control) based on the above position information, the image captured by the camera, and the detection result of the radar unit 100. The automatic driving control includes, for example, control for automatically steering the vehicle body to travel straight parallel to a set predetermined travel reference line, control for automatically traveling the vehicle body along the created target travel route, and control for automatically stopping or decelerating the travel of the vehicle body by detecting obstacles around the vehicle body.

[0047] Hereinafter, the support structure of the front radar unit 100F will be specifically described.

[0048] The front radar unit 100F of the present embodiment is attached to the weight support portion 60 via the support member 200. Therefore, hereinafter, the configurations of the weight support portion 60 and the support member 200 will be specifically described.

[0049] The weight support portion 60 shown in FIGS. 2 to 5 is for supporting a weight member serving as a weight. The weight support portion 60 is formed, for example, of a casting. The weight support portion 60 is formed in a trapezoidal shape in plan view such that the left-right width increases toward the front. The upper surface 61 of the weight support portion 60 is formed to be substantially horizontal. A recess 61a that is slightly recessed downward with respect to the periphery is formed at the rear end portion of the upper surface 61 (see FIG. 5). The recess 61a is formed in a shape (rectangular shape in plan view) corresponding to the bottom portion 211a of the support member 200 described later.

[0050] The weight support portion 60 is formed with a hitch pin holding portion 63 for holding a substantially cylindrical hitch pin 64. The hitch pin holding portion 63 is a through hole formed so as to vertically penetrate the front portion of the weight support portion 60 (the front portion of the recess 61a). By inserting the hitch pin 64 into the hitch pin holding portion 63, the hitch pin 64 can be held. The hitch pin 64 held by the hitch pin holding portion 63 is exposed forward through an opening 62 formed in the front side surface of the weight support portion 60. By fixing a wire or the like connected to another vehicle or the like to this hitch pin 64, it is possible to tow another vehicle or the like with the own vehicle, or to tow the own vehicle with another vehicle.

[0051] The weight support portion 60 is fixed to the front end of the airframe frame 2 by a fixture such as a bolt. At this time, by arranging a plate-like spacer 65 between the airframe frame 2 and the weight support portion 60 as necessary, the front-rear position of the weight support portion 60 with respect to the airframe frame 2 can be adjusted.

[0052] In the present embodiment, the weight support portion 60 formed of a casting is exemplified, but the present invention is not limited to this, and the configuration of the weight support portion 60 is not particularly limited. For example, the weight support portion 60 can also be configured by combining metal plate materials or the like.

[0053] The support member 200 shown in FIGS. 5 and 6 is for supporting the front radar unit 100F. The support member 200 mainly includes a front side member 210 and a rear side member 220.

[0054] The front side member 210 is a member that constitutes the front side portion of the support member 200. The front side member 210 mainly includes a front side surface portion 211, a partition portion 212, a support portion 213, a closing portion 214, a grommet 215, and an up-and-down rotation portion 216.

[0055] The front side surface 211 is a part mainly forming the front side surface of the support member 200. The front side surface 211 mainly includes a bottom portion 211a, a front first standing surface 211b, a front second standing surface 211c, a front third standing surface 211d, and a lower fixing portion 211e.

[0056] The bottom portion 211a is a plate-shaped part forming the bottom surface of the support member 200. The bottom portion 211a is arranged substantially horizontally. The bottom portion 211a is formed in a substantially rectangular shape in plan view.

[0057] The front first standing surface 211b is a plate-shaped part formed to rise from the front end of the bottom portion 211a. The front first standing surface 211b is formed with its plate surface facing in the front-rear direction. The front first standing surface 211b is arranged substantially parallel to the vertical direction.

[0058] The front second standing surface 211c is a plate-shaped part extending forward and upward from the upper end of the front first standing surface 211b. The front second standing surface 211c is formed to have a posture more inclined forward than the front first standing surface 211b. A front through hole 211f penetrating the front second standing surface 211c in the front-rear direction is formed in the front second standing surface 211c.

[0059] The front third standing surface 211d is a plate-shaped part extending upward from the upper end of the front second standing surface 211c. The front third standing surface 211d is arranged substantially parallel to the vertical direction. That is, the front third standing surface 211d is formed to be substantially parallel to the front first standing surface 211b.

[0060] As shown in FIG. 2, the front first standing surface 211b and the front second standing surface 211c are formed such that the left-right width gradually narrows from bottom to top. Also, the front third standing surface 211d is formed such that the left-right width gradually widens from bottom to top.

[0061] The lower fixing portion 211e shown in FIG. 6 is a portion to which the rear member 220 is fixed. The lower fixing portion 211e is formed by appropriately bending a flat plate-like member. The lower fixing portion 211e is fixed to the upper surface of the bottom portion 211a. The lower fixing portions 211e are provided one each on the left and right of the bottom portion 211a.

[0062] The partition portion 212 is for partitioning the internal space of the support member 200 formed by the front member 210 and the rear member 220 and the opening formed by the front through hole 211f and the rear through hole 221c. The partition portion 212 is formed so as to stand upright rearward from the rear surface of the front second standing surface 211c. The partition portion 212 is formed so as to surround the periphery of the front through hole 211f. In particular, in the present embodiment, the partition portion 212 is formed so as to surround the periphery of the front through hole 211f without a gap. A fixing portion 212a is provided on the partition portion 212.

[0063] The fixing portion 212a is a portion to which the rear member 220 is fixed. The fixing portion 212a is formed by appropriately bending a flat plate-like member. The fixing portion 212a is fixed to the side surface of the partition portion 212. Two fixing portions 212a are provided at the upper part and two at the lower part of the partition portion 212.

[0064] The support portion 213 shown in FIGS. 6 and 7 is a portion to which the front radar unit 100F is fixed. The support portion 213 is formed by appropriately bending a flat plate-like member. The support portion 213 is fixed near the upper end of the rear surface of the front third standing surface 211d. A standing portion 213a and an upper fixing portion 213b are formed on the support portion 213.

[0065] The standing portion 213a is a portion that stands upright upward. A pair of left and right standing portions 213a are formed so as to face each other. The standing portion 213a is formed so as to protrude above the upper end of the front surface portion 211.

[0066] The upper fixing portion 213b is the portion to which the rear member 220 is fixed. The upper fixing portion 213b is formed with the plate surface facing rearward. The upper fixing portion 213b is formed in a pair on the left and right below the standing portion 213a.

[0067] The closing portion 214 is for closing the gap formed between the upper end portion of the front member 210 and the upper end portion of the rear member 220. The closing portion 214 is formed in a flat plate shape. The closing portion 214 is disposed substantially horizontally and is disposed on the left and right of the support portion 213 respectively. Thereby, the gap (the upper opening portion) formed between the front member 210 and the rear member 220 described later can be closed. A notch portion 214a for passing the wiring 101 of the front radar unit 100F is formed in the right closing portion 214.

[0068] The grommet 215 is for closing the notch portion 214a through which the wiring 101 is inserted and protecting the wiring 101. The grommet 215 is formed of a relatively soft material (for example, an elastic material such as rubber). The grommet 215 is formed in a shape corresponding to the notch portion 214a. The grommet 215 is fitted into the notch portion 214a. The wiring 101 can pass through vertically through the through hole formed in the grommet 215.

[0069] The vertical rotation portion 216 is fixed to the front radar unit 100F and is connected to the support portion 213 so as to be rotatable vertically. The vertical rotation portion 216 is appropriately fixed to the lower part of the back surface of the front radar unit 100F. The vertical rotation portion 216 is formed such that a pair of left and right side walls extend downward.

[0070] The pair of side walls of the vertical pivoting portion 216 are connected to the standing portion 213a via a support shaft 216a in a state where the standing portion 213a is positioned between the pair of side walls. In the present embodiment, the support shaft 216a is constituted by a bolt. The vertical pivoting portion 216 is supported so as to be pivotable vertically about the support shaft 216a by loosening the support shaft 216a (bolt). By tightening the support shaft 216a with the front radar unit 100F oriented at an arbitrary angle, the vertical angle of the front radar unit 100F can be adjusted.

[0071] The rear member 220 shown in FIGS. 5 and 6 is a member that constitutes the rear portion of the support member 200. The rear member 220 mainly includes a rear side surface portion 221, a left side surface portion 222, and a right side surface portion 223.

[0072] The rear side surface portion 221 is a portion that mainly forms the rear side surface of the support member 200. The rear side surface portion 221 mainly includes a rear first standing portion 221a and a rear second standing portion 221b.

[0073] The rear first standing portion 221a is a plate-like portion formed with its plate surface oriented in the front-rear direction. The rear first standing portion 221a is formed in a forwardly inclined posture extending from the rear lower side toward the front upper side. The rear first standing portion 221a is formed at an angle closer to vertical than the front second standing surface 211c (see FIG. 3).

[0074] A rear through hole 221c penetrating the rear first standing portion 221a in the front-rear direction is formed in the rear first standing portion 221a. The rear through hole 221c is formed in a shape (substantially the same shape) corresponding to the front through hole 211f formed in the front second standing surface 211c.

[0075] A notch portion 221d is formed at the lower end portion of the rear first standing portion 221a. The notch portion 221d is formed at the left-right center of the lower end portion of the rear first standing portion 221a.

[0076] The rear second standing portion 221b is a plate-shaped portion that extends upward from the upper end of the rear first standing portion 221a. The rear second standing portion 221b is disposed substantially parallel to the vertical direction.

[0077] The rear first upright portion 221a is formed so that its left-right width gradually narrows from bottom to top, similar to the front first upright surface 211b and the front second upright surface 211c. Furthermore, the rear second upright portion 221b is formed so that its left-right width gradually widens from bottom to top, similar to the front third upright surface 211d. As a result, when the rear member 220 is fixed to the front member 210, as shown in FIG. 2, the rear member 220 is arranged so that almost the entire rear member 220 is hidden behind the front member 210 (so as to overlap with the front member 210) in a front view.

[0078] The left side surface portion 222 is a portion that mainly forms the left side surface of the support member 200. The left side surface portion 222 is formed in a plate shape that extends forward from the left end of the rear side surface portion 221. The left side surface portion 222 is formed from the upper end to the lower end of the rear side surface portion 221. The front edge portion of the left side surface portion 222 is formed to have a shape that corresponds to the shape of the back surface of the front side surface portion 211. This allows the left side surface portion 222 to contact the front side surface portion 211 of the front side member 210 with almost no gap when the rear side member 220 is fixed to the front side member 210. The left side surface portion 222 is formed integrally with the rear side surface portion 221. For example, the rear side surface portion 221 and the left side surface portion 222 can be formed by appropriately bending a single plate-shaped member.

[0079] The right side surface portion 223 is a portion that mainly forms the right side surface of the support member 200. Note that the right side surface portion 223 is formed in a shape that is roughly bilaterally symmetrical to the left side surface portion 222, and therefore a detailed description thereof will be omitted.

[0080] In this embodiment, the left side surface portion 222 and the right side surface portion 223 are formed integrally with the rear side surface portion 221, but the present invention is not limited to this. For example, the left side surface portion 222 and the right side surface portion 223 can also be formed integrally with the front member 210 (front side surface portion 211).

[0081] The support member 200 configured as described above is fixed to the weight support portion 60. Specifically, as shown in FIG. 5, the bottom portion 211a of the front member 210 is placed in the concave portion 61a of the weight support portion 60 and fixed to the upper surface 61 of the weight support portion 60 by a fixing tool such as a bolt. Further, as shown in FIGS. 5 and 6, the rear member 220 is fixed to the rear portion of the front member 210. At this time, the rear member 220 is fixed to the front member 210 (lower fixing portion 211e, fixing portion 212a, and upper fixing portion 213b) by a fixing tool such as a bolt. The fixing tool (bolt or the like) for fixing the rear member 220 is fastened to the front member 210 from the back side of the rear side surface 221. Therefore, in the state where the tractor 1 is viewed from the front, the fixing tool is difficult to be visually recognized, and thus the design property of the tractor 1 can be improved.

[0082] In this way, by fixing the support member 200 to the upper surface of the weight support portion 60, the workability of operations such as maintenance by the operator can be improved. For example, when opening and closing the bonnet 4 using the bonnet lock mechanism 18 shown in FIG. 3 or performing maintenance on the battery 17, etc., the support member 200 is less likely to interfere with the work.

[0083] Further, since the support member 200 is fixed to the concave portion 61a formed at the rear end portion of the upper surface 61 of the weight support portion 60, as shown in FIG. 3, a space for attaching a weight member (not shown) can be secured at the front portion of the weight support portion 60. Particularly in this embodiment, by bending the front side surface 211 of the support member 200, a space above the weight support portion 60 is secured, making it easier to perform the attachment and detachment work of the weight member (not shown).

[0084] Also, in the state where the rear member 220 shown in FIGS. 5 and 6 is fixed to the front member 210, the front ends of the left side surface 222 and the right side surface 223 of the rear member 220 are close to the vicinity of the front member 210 (front side surface 211). In this way, the support member 200 is formed in a hollow shape surrounded by the front side surface 211, the rear side surface 221, the left side surface 222, and the right side surface 223 in the front - rear - left - right directions.

[0085] By forming the support member 200 in a hollow shape, various components and the like can be accommodated inside the support member 200. For example, in the present embodiment, as shown in FIG. 7, the wiring 101 and connectors of the front radar unit 100F are accommodated inside the support member 200. The wiring 101 can be taken out to the rear (vehicle body side) of the support member 200 through, for example, the notch 221d (see FIG. 6). By accommodating the wiring 101 in the support member 200, the appearance can be improved, and it is possible to prevent mud, sand dust, etc. from adhering to the wiring 101 and being damaged.

[0086] Note that the wiring 101 does not necessarily have to be accommodated inside the support member 200, and it is also possible to arrange it outside the support member 200, for example. In this case, in order to protect the wiring 101, it is desirable to provide a cover member or the like that covers the wiring 101.

[0087] In a state where the rear member 220 is fixed to the front member 210, the rear end of the partition portion 212 of the front member 210 approaches near the rear through hole 221c of the rear member 220. In this way, the partition portion 212 is arranged so as to connect the front through hole 211f and the rear through hole 221c. Further, the partition portion 212 is arranged so as to partition the front through hole 211f and the rear through hole 221c from the internal space of the support member 200 formed in a hollow shape.

[0088] As shown in FIG. 2, the support member 200 is arranged substantially at the center of the left and right of the vehicle body. As a result, the support member 200 is arranged between the left and right headlamps 4c and the left and right work lamps 4b in a front view. As shown in FIG. 3, the support member 200 can support the front radar unit 100F at a position higher than the front upper end portion of the bonnet 4.

[0089] Further, the support member 200 includes a portion where the left - right width gradually narrows from bottom to top (hereinafter referred to as "first portion P1"). The first portion P1 is composed of the front - side first standing surface 211b, the front - side second standing surface 211c, etc. By widening the left - right width at the lower part of the first portion P1, the rigidity of the lower part of the support member 200 can be improved, and the vibration of the front - side radar unit 100F can be suppressed. Also, by narrowing the left - right width at the upper part of the first portion P1, it is possible to suppress the obstruction of the light irradiated forward from the headlamp 4c. Further, by narrowing the left - right width at the upper part of the first portion P1, the front surface of the bonnet 4 can be exposed as much as possible in a front view, and it is possible to easily take in air into the inside of the bonnet 4. Thereby, a decrease in the cooling performance of the engine 3 and the like can be prevented.

[0090] Further, the support member 200 includes a portion where the left - right width gradually widens from bottom to top (hereinafter referred to as "second portion P2"). The second portion P2 is formed above the first portion P1. The second portion P2 is composed of the front - side third standing surface 211d, etc. By widening the left - right width at the upper part of the second portion P2, a wider portion (the upper - end portion of the support member 200) for attaching the front - side radar unit 100F can be secured. Also, by widening the left - right width of the second portion P2, for example, a space for attaching decorative parts such as a logo mark can be secured on the front - side surface of the second portion P2.

[0091] Further, the support member 200 includes an opening P3 that penetrates the support member 200 in the front - rear direction. The opening P3 is composed of the front - side through - hole 211f, the rear - side through - hole 221c, etc. By forming the opening P3 in this way, the front surface of the bonnet 4 can be exposed as much as possible in a front view, and it is possible to easily take in air into the inside of the bonnet 4.

[0092] Also, as shown in FIG. 8, the opening P3 is formed above the hitch pin holding portion 63 formed in the weight support portion 60 (at a position overlapping the hitch pin holding portion 63 in the vertical direction). By configuring in this way, when detaching (inserting and removing) the hitch pin 64 from the hitch pin holding portion 63, it is possible to suppress interference between the hitch pin 64 and the support member 200. Although the support member 200 is hollow as described above, in FIG. 8, the cross section (hatched portion) of the support member 200 is shown in a simplified manner.

[0093] Hereinafter, a modified example of the tractor 1 will be described with reference to FIG. 9.

[0094] FIG. 9 shows a modified example in which a reference portion 300 is provided above the front radar unit 100F. The reference portion 300 is formed by, for example, a plate-like member with its plate surface facing left and right. The reference portion 300 is fixed to the back surface of the front radar unit 100F. The reference portion 300 is provided so as to protrude upward from the front radar unit 100F. The reference portion 300 is arranged at the left-right center of the front radar unit 100F (and thus at the left-right center of the vehicle body).

[0095] An operator (driver) who has boarded the cabin 10 can visually recognize the reference portion 300 from inside the cabin 10. By grasping the position of the reference portion 300 in the visual field (scenery such as a field) visually recognized from inside the cabin 10, the operator can easily grasp the orientation of the vehicle body of the tractor 1. Thereby, the tractor 1 can be accurately operated in the field.

[0096] In FIG. 9, an example in which the reference portion 300 is provided on the front radar unit 100F is shown, but the present invention is not limited to this. For example, it is also possible to provide the reference portion 300 on the support member 200 instead of the front radar unit 100F.

[0097] As described above, the tractor 1 (work vehicle) according to the present embodiment is provided at the front part of the vehicle body and includes a weight support portion 60 that supports a weight member, A front radar unit 100F (front detection unit) capable of detecting a detection target in front of the vehicle body, A support member 200 that is fixed to the upper surface 61 of the weight support portion 60 and supports the front radar unit 100F, It is equipped with. By configuring in this way, the workability of work such as maintenance by the operator can be improved. Specifically, by fixing the support member 200 to the upper surface 61 of the weight support portion 60, it becomes difficult for the support member 200 to hinder work such as maintenance from the side of the tractor 1 (bonnet 4).

[0098] Also, the support member 200 Is formed in a hollow shape. By configuring in this way, various components can be accommodated inside. For example, by accommodating the wiring 101 of the front radar unit 100F, damage and deterioration of the wiring 101 can be prevented.

[0099] Also, the support member 200 A front member 210 that forms the front surface of the support member 200, A rear member 220 that forms the rear surface of the support member, It is equipped with. By configuring in this way, the support member 200 can be made into a simple configuration.

[0100] Also, the left and right side surfaces of the support member 200 Are integrally formed with either one of the front member 210 and the rear member 220. By configuring in this way, the support member 200 can be made into a simple configuration.

[0101] Also, the support member 200 It is equipped with a first portion P1 whose left - right width gradually narrows from bottom to top. By configuring in this way, the rigidity of the lower part of the support member 200 can be improved, and the vibration of the front radar unit 100F can be suppressed. Also, by narrowing the left - right width of the upper part of the support member 200, it is possible to make it difficult to obstruct the light irradiated from the headlamp 4c or the like.

[0102] Also, the support member 200 is provided with a second part P2 formed above the first part P1 and having a gradually increasing left - right width from bottom to top. By configuring in this way, by widening the left - right width of the upper part of the second part P2, it is possible to ensure a wide area for attaching the front radar unit 100F (the upper part of the support member 200).

[0103] Also, the front radar unit 100F is supported by the support member 200 so that the attachment angle to the support member 200 can be changed. By configuring in this way, by adjusting the angle of the front radar unit 100F, it is possible to suitably detect a detection target in front of the vehicle body.

[0104] Also, in the support member 200, an opening P3 penetrating the support member 200 in the front - rear direction is formed. By configuring in this way, it is possible to easily take in air into the inside of the bonnet 4 through the opening P3.

[0105] Also, in the weight support part 60, a hitch - pin holding part 63 capable of holding a hitch pin 64 is formed, and the opening P3 is formed at a position overlapping the hitch - pin holding part 63 in the vertical direction. By configuring in this way, it is possible to prevent the hitch pin 64 from interfering with the support member 200 when inserting and removing the hitch pin 64.

[0106] Further, the support member 200 includes a partition portion 212 that partitions the internal space of the support member 200 and the opening P3. By configuring in this way, it is possible to suppress rainwater, sand and dust, etc. from entering the internal space of the support member 200 from the opening P3.

[0107] Further, the front surface of the support member 200 includes a front first standing surface 211b (first standing surface), a front second standing surface 211c (second standing surface) formed above the front first standing surface 211b and formed to incline forward from the front first standing surface 211b, and a front third standing surface 211d (third standing surface) formed above the front second standing surface 211c and formed parallel to the front first standing surface 211b. By configuring in this way, a space for arranging the weight member can be secured below the front surface of the support member 200.

[0108] Further, the support member 200 is arranged between the left and right headlamps 4c in a front view. By configuring in this way, it is possible to suppress the inhibition of the light irradiated forward from the headlamp 4c.

[0109] Further, the support member 200 is arranged between the left and right work lamps 4b in a front view. By configuring in this way, it is possible to suppress the inhibition of the light irradiated forward from the work lamp 4b.

[0110] Further, at least one of the front radar unit 100F and the support member 200 includes a reference portion 300 that serves as a reference for the direction of the vehicle body. By configuring in this way, the direction of the vehicle body of the tractor 1 can be easily grasped.​

[0111] Note that the tractor 1 according to the present embodiment is one embodiment of the work vehicle according to the present invention. Also, the front radar unit 100F according to the present embodiment is one embodiment of the front detection unit according to the present invention. Also, the front first standing surface 211b, the front second standing surface 211c, and the front third standing surface 211d according to the present embodiment are each one embodiment of the first standing surface, the second standing surface, and the third standing surface according to the present invention.

[0112] As described above, each embodiment of the present invention has been described. However, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0113] Specifically, the configuration of the support member 200 is not limited to the above-described embodiment and can be arbitrarily changed. For example, although the support member 200 is mainly composed of two members, i.e., the front member 210 and the rear member 220, the present invention is not limited thereto, and the support member 200 can also be composed of one member or three or more members.

[0114] In the present embodiment, the support member 200 formed in a hollow shape is exemplified. However, for example, the support member 200 does not necessarily have to be formed in a hollow shape.

[0115] Also, the shape of the support member 200 shown in the present embodiment is an example and can be arbitrarily changed. For example, it is also possible to form the support member 200 so that the left and right widths are constant.

[0116] In the present embodiment, the support member 200 in which the opening P3 is formed is exemplified. However, the support member 200 does not necessarily have to form the opening P3.

[0117] Also, in the present embodiment, the upper surface 61 of the weight support portion 60 to which the support member 200 is fixed is formed to be substantially horizontal. However, the present invention is not limited to this. The upper surface 61 of the weight support portion 60 may be a surface generally facing upward, and may be inclined with respect to the horizontal direction, for example.

[0118] In addition, the arrangement of the camera and the radar unit 100 is not limited to the example shown in the above-described embodiment, and can be arbitrarily changed.

[0119] Also, in the present embodiment, an example in which a radar unit 100 that performs detection using radio waves is adopted as the detection unit is shown. However, the present invention is not limited to such an aspect. As the detection unit, various devices capable of detecting detection targets around the vehicle body, such as ultrasonic sensors, can be adopted.

[0120] Also, in the above embodiment, an example in which the cabin 10 adopts a configuration (six-pillar type) including a front pillar 12, a rear pillar 13, and a center pillar 14 is shown. However, the present invention is not limited to this. As the cabin 10, various configurations such as a configuration (four-pillar type) not including the center pillar 14 can be adopted.

[0121] Also, in the above embodiment, the tractor 1 is exemplified as the work vehicle. However, the present invention is not limited to such an aspect. For example, the work vehicle may be other agricultural vehicles, construction vehicles, industrial vehicles, or the like.

Description of Reference Numerals

[0122] 1 Tractor 4b Work lamp 4c Headlamp 60 Weight support portion 61 Upper surface 63 Hitch pin holding portion 100 Radar unit 100F Front radar unit 200 Support member 210 Front member 211b Front first standing surface 211c Front second standing surface 211d Front third standing surface 212 Partition part 220 Rear member 300 Reference part

Claims

1. A weight support portion provided at the front part of the vehicle body for supporting a weight member, A front detection portion capable of detecting a detection target in front of the vehicle body, A support member fixed to the upper surface of the weight support portion for supporting the front detection portion, A work vehicle comprising the above.

2. The support member Is formed in a hollow shape, The work vehicle according to Claim 1.

3. The support member A front side member forming the front side surface of the support member, A rear side member forming the rear side surface of the support member, Comprises, The work vehicle according to Claim 1.

4. The left and right side surfaces of the support member Are integrally formed with either one of the front side member and the rear side member, The work vehicle according to Claim 3.

5. The support member Comprises a first portion in which the left - right width gradually narrows from bottom to top, The work vehicle according to Claim 1.

6. The support member Is formed above the first portion and comprises a second portion in which the left - right width gradually widens from bottom to top, The work vehicle according to Claim 5.

7. The front detection portion Is supported by the support member such that the attachment angle to the support member can be changed, The work vehicle according to Claim 1.

8. An opening penetrating the support member in the front - rear direction is formed in the support member, The work vehicle according to Claim 1.

9. A hitch - pin holding portion capable of holding a hitch pin is formed in the weight support portion, The opening Is formed at a position overlapping the hitch - pin holding portion in the vertical direction, The work vehicle according to Claim 8.

10. The support member Comprises a partition portion partitioning the internal space of the support member and the opening, The work vehicle according to Claim 8 or Claim 9.

11. The front side surface of the support member A first standing surface, A second standing surface formed above the first standing surface and inclined forward more than the first standing surface, A third standing surface formed above the second standing surface and parallel to the first standing surface, Comprises, The work vehicle according to Claim 1.

12. The support member Is arranged between the left and right headlamps in a front view, The work vehicle according to Claim 1.

13. The support member Is arranged between the left and right work lamps in a front view, The work vehicle according to Claim 1.

14. At least one of the front detection portion and the support member ​ ​ Comprising a reference portion that serves as a reference for the orientation of the vehicle body. The work vehicle according to claim 1.

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