Work vehicle

Abstract

To provide an art which enables a quantum compass to be arranged properly in a work vehicle.SOLUTION: An exemplary work vehicle includes: a cabin part having a floor; a seat part supported by the floor; and a quantum compass provided at the seat part or a periphery of the seat part.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a work vehicle. [Background technology]

[0002] Conventionally, work vehicles equipped with a function for acquiring vehicle position information for the purposes of autonomous driving, recording work information, or theft prevention have been known. Positioning satellites have conventionally been used to acquire vehicle position information. Patent Document 1 discloses a work vehicle equipped with a GNSS (Global Navigation Satellite System) antenna that acquires information (satellite information) from positioning satellites. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-129654 Summary of the Invention [Problem to be solved by the invention]

[0004] In a configuration that uses satellite information to obtain the vehicle's position information, the positioning antenna must be located in a position that facilitates communication with the satellite, which places restrictions on the placement of the positioning device. In this regard, if a quantum compass is used as a positioning device to obtain the vehicle's position information, communication with a satellite is not required, which is thought to increase the freedom in the placement of the positioning device. However, the operating environment of a work vehicle is harsher than that of a regular automobile, for example, there is a lot of dust and dirt, and vibrations during driving are likely to be large. In other words, when placing a quantum compass on a work vehicle, it is necessary to consider the harsh operating environment when devising a placement.

[0005] An object of the present invention is to provide a technology that enables a quantum compass to be appropriately arranged on a work vehicle. [Means for solving the problem]

[0006] An exemplary work vehicle of the present invention comprises a passenger section having a floor, a seat section supported by the floor, and a quantum compass provided in or around the seat section. [Effects of the Invention]

[0007] In accordance with the exemplary present invention, a quantum compass may be placed in an appropriate location on the work vehicle. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a side view showing a schematic configuration of a work vehicle; [Figure 2] FIG. 1 is a plan view showing a schematic configuration of a work vehicle; [Figure 3] FIG. 1 is a perspective view showing a schematic configuration of a boarding base that constitutes the boarding section. [Figure 4] FIG. 4 shows the seat section attached to the boarding base shown in FIG. 3. [Figure 5] FIG. 1 is a side view showing a schematic configuration of a boarding base that constitutes the boarding section. [Figure 6] FIG. 1 is a side view showing a schematic configuration of a work vehicle of another embodiment to which the present invention can be applied. [Figure 7] FIG. 7 is a perspective view showing a schematic configuration of a boarding base in the cabin-type work vehicle shown in FIG. [Figure 8] FIG. 1 is a longitudinal cross-sectional view schematically illustrating a first embodiment of the quantum compass arrangement. [Figure 9] FIG. 1 is a schematic diagram for explaining a second embodiment of the quantum compass arrangement, showing the seat and its surroundings in exploded form. [Figure 10] FIG. 10 is a longitudinal cross-sectional view schematically illustrating a second embodiment of the quantum compass arrangement. [Figure 11] FIG. 10 is a longitudinal cross-sectional view schematically illustrating a third embodiment of the quantum compass arrangement. [Figure 12] Schematic diagram for explaining a fourth embodiment of the quantum compass arrangement [Figure 13] 13-13 in FIG. 12. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] The work vehicle according to an embodiment of the present invention is a tractor. However, this is merely an example. The work vehicle may be an agricultural work machine other than a tractor, such as a harvester such as a combine harvester, or a transplanter such as a rice transplanter. The work vehicle may also be a work machine other than an agricultural work machine, such as a work machine for civil engineering or construction work, or a snowplow.

[0011] In addition, directions are defined as follows in this specification. First, the direction in which a tractor serving as a work vehicle travels during work is defined as "forward," and the opposite direction is defined as "rearward." Furthermore, the right side of the tractor's direction of travel is defined as right, and the left side is defined as left. The direction perpendicular to the front-to-back and left-to-right directions of the tractor is defined as up-to-down. In this case, the direction of gravity is defined as down, and the opposite side is defined as up. Furthermore, the plane perpendicular to the up-to-down direction is defined as the horizontal plane, and the direction along the horizontal plane is defined as the horizontal direction. Note that the above directions are simply names used for the purpose of explanation and are not intended to limit the actual positional relationships or directions.

[0012] <1. Overview of the work vehicle> Fig. 1 is a side view showing the general configuration of a work vehicle 1 according to an embodiment of the present invention. Fig. 2 is a plan view showing the general configuration of a work vehicle 1 according to an embodiment of the present invention. As shown in Fig. 1, the work vehicle 1 comprises a vehicle body 2, wheels 3, a prime mover 4, and a power transmission unit 5.

[0013] As shown in Figures 1 and 2, the wheels 3 have front wheels 3a and rear wheels 3b. The front wheels 3a are arranged on the left and right sides of the front of the vehicle body 2. The rear wheels 3b are arranged on the left and right sides of the rear of the vehicle body 2. The vehicle body 2 is provided so that it can travel using the front wheels 3a and rear wheels 3b. In other words, the work vehicle 1 of this embodiment is a wheeled tractor. However, the work vehicle 1 is not limited to a wheeled tractor, and may also be a crawler-type tractor that travels using crawlers.

[0014] The prime mover 4 is disposed in the front of the vehicle body 2 and is covered by a hood 6. In this embodiment, the prime mover 4 is an engine. The engine may be, for example, a diesel engine, a gasoline engine, a hydrogen engine, or a gas engine. However, the prime mover 4 may be something other than an engine, such as a motor.

[0015] The power transmission unit 5 is disposed behind the prime mover 4. The power transmission unit 5 transmits the power of the prime mover 4 to the wheels 3. Specifically, the power of the prime mover 4 is transmitted to at least one of the front wheels 3a and the rear wheels 3b via the power transmission unit 5. In this embodiment, the power of the prime mover 4 is transmitted to the front wheels 3a and the rear wheels 3b via the power transmission unit 5. Specifically, the power transmission unit 5 has a transmission case 212 in which a transmission is disposed. In addition to or instead of the transmission case 212, the power transmission unit 5 may have at least one of a power transmission shaft, a gear, a pulley, a belt, a chain, a reducer, and a case that houses such power transmission elements, for example.

[0016] The vehicle body 2 has a base portion 21 to which the wheels 3 are attached, and a riding portion 22 supported by the base portion 21. In other words, the work vehicle 1 is equipped with the base portion 21 and the riding portion 22.

[0017] In detail, the base unit 21 has a base frame 211, a transmission case 212 included in the power transmission unit 5, a front axle 213, and a rear axle 214. The front axle 213 has a front wheel axle (not shown) to which the front wheels 3a are attached. The rear axle 214 has a rear wheel axle (not shown) to which the rear wheels 3b are attached. The transmission case 212 and the front axle 213 are attached to the base frame 211. The rear axle 214 is attached to the transmission case 212. The base frame 211 supports the prime mover 4.

[0018] The riding section 22 is the portion of the vehicle body 2 on which the driver (operator) rides, and is provided behind the prime mover 4. The riding section 22 is also provided above the power transmission section 5. The riding section 22 has a seat section 221, a steering section 222, and a dashboard section 223. In other words, the work vehicle 1 is equipped with the seat section 221, the steering section 222, and the dashboard section 223.

[0019] The seat section 221 is where the driver of the work vehicle 1 sits. The steering section 222 constitutes a device that allows the driver sitting in the seat section 221 to steer the work vehicle 1. More specifically, the steering section 222 has a steering wheel 222a and a steering column 222b. The steering wheel 222a is the part that is operated by the driver and is configured in a circular shape. The steering wheel 222a is rotatably supported by a steering shaft (not shown) that is arranged inside the steering column 222b that is located below the steering wheel 222a. By rotating the steering wheel 222a, the direction of the front wheels 3a can be changed.

[0020] The dashboard section 223 is provided at the front of the riding section 22. In detail, at least a portion of the dashboard section 223 is disposed in front of the steering column 222b. The dashboard section 223 is provided with a meter panel (instrument board) that visualizes values ​​measured by various instruments, including the speed of the work vehicle 1, and various levers, switches, etc. for operating the work vehicle 1.

[0021] Additionally, levers, pedals, etc. are arranged around the seat section 221 in the riding section 22 for operating the work vehicle 1 itself and a work implement (not shown) attached to the rear of the work vehicle 1. Furthermore, an operating section 224 used when causing the work vehicle 1 to travel automatically is arranged in front of the seat section 221 in the riding section 22. Note that automatic traveling means that at least steering is performed autonomously, with devices related to traveling being controlled by a control device (not shown). In automatic traveling, in addition to steering, for example, at least one of adjusting vehicle speed and performing work using a work implement may be performed autonomously.

[0022] In this embodiment, a ROPs frame 7 is provided behind the seat section 221. The ROPs frame 7 can protect the driver when the work vehicle 1 rolls over.

[0023] A work implement coupling section 8, which is configured, for example, by a three-point linkage mechanism, is provided at the rear of the vehicle body 2. The work implement coupling section 8 is provided so that a work implement can be detachably attached. Only one type of work implement may be attached to the work implement coupling section 8, but preferably multiple types are attached. Examples of work implements include cultivators, plows, fertilizer applicators, pesticide sprayers, harvesters, and reapers. A lifting device (not shown) having a hydraulic device such as a lifting cylinder is provided at the rear of the vehicle body 2. The lifting device raises and lowers the work implement coupling section 8, thereby raising and lowering the work implement attached to the work implement coupling section 8. Power generated by the prime mover 4 can be transmitted to the work implement via a power take-off shaft (PTO shaft; not shown) extending from the power transmission section 5 toward the rear of the vehicle body 2. In other words, the work implement can be operated by the prime mover 4. The work implement may be driven by a drive device separate from the prime mover 4.

[0024] <2. Composition of the boarding section> The configuration of the riding section 22 provided in the work vehicle 1 will be described in further detail. Fig. 3 is a perspective view showing the general configuration of the riding base 220 that constitutes the riding section 22. Fig. 4 is a diagram showing a state in which a seat section 221 is attached to the riding base 220 shown in Fig. 3. Fig. 5 is a side view showing the general configuration of the riding base 220 that constitutes the riding section 22.

[0025] The boarding base 220 is a base portion of the riding section 22. The above-mentioned seat section 221, steering section 222, dashboard section 223, etc. are arranged on the boarding base 220. As shown in FIGS. 3 to 5 , the boarding base 220 has a riding section frame 2201, a floor 2202, a riding section front wall 2203, a riding section rear wall 2204, and left and right riding section side walls 2205. In other words, the riding section 22 has the riding section frame 2201, the floor 2202, the riding section front wall 2203, the riding section rear wall 2204, and left and right riding section side walls 2205.

[0026] The riding section frame 2201 is a framework of the riding section 22. The floor 2202, the riding section front wall 2203, the riding section rear wall 2204, and the left and right riding section side walls 2205 are supported by the riding section frame 2201. The ROPS frame 7 described above is supported by the riding section frame 2201.

[0027] The floor 2202 forms the floor surface of the riding section 22. In other words, the floor 2202 forms the bottom wall of the riding section 22. The floor 2202 may be formed of a single member (floor member), but in this embodiment, it is formed of multiple members (floor members). In detail, the floor 2202 has a lower floor 2202a, an upper floor 2202b, and a connecting floor 2202c that connects the lower floor 2202a and the upper floor 2202b. The lower floor 2202a and the upper floor 2202b extend horizontally. The lower floor 2202a is positioned at a lower height position in the up-down direction than the upper floor 2202b. The connecting floor 2202c connects the rear end of the lower floor 2202a and the front end of the upper floor 2202b.

[0028] As shown in Fig. 4, the seat 221 is disposed on the upper floor 2202b. That is, the seat 221 is supported by the floor 2202. When driving the work vehicle 1, the driver sitting in the seat 221 places his or her feet on the lower floor 2202a to drive the work vehicle 1. A floor mat may be placed on the upper surface of the lower floor 2202a.

[0029] The riding section front wall 2203 is erected in the left-right center of the front end of the riding section 22. More specifically, the riding section front wall 2203 is a partition wall that prevents high-temperature air inside the bonnet 6 from flowing into the riding section 22. In other words, the riding section front wall 2203 is a so-called air cut plate.

[0030] The riding section rear wall 2204 is arranged behind the seat section 221 so as to face the rear surface of the seat section 221. That is, the riding section 22 has the riding section rear wall 2204 arranged behind the seat section 221. In detail, the riding section rear wall 2204 extends upward from the rear end of the upper floor 2202b. In this embodiment, the riding section rear wall 2204 is made of the same material as the material that makes up the upper floor 2202b, but it may be made of a material separate from the upper floor 2202b. The left and right riding section side walls 2205 are arranged on the left and right of the upper floor 2202b. The left and right riding section side walls 2205 are arranged so as to sandwich the seat section 221 arranged on the upper floor 2202b in the left-right direction.

[0031] As shown in FIG. 5 , the boarding base 220 configured as described above is disposed on the base portion 21 via the vibration-isolating member 10. That is, the base portion 21 supports the boarding portion 22 via the vibration-isolating member 10. The vibration-isolating member 10 is, for example, a rubber member. In this embodiment, a vibration-isolating rubber (vibration-isolating member) 10 is disposed between (in the vertical direction) the base frame 211 constituting the base portion 21 and the boarding portion frame 2201 supported from below by the base frame 211. More specifically, the vibration-isolating rubber 10 is disposed between the base frame 211 and a mount portion 2201c provided on the lower part of the boarding portion frame 2201. The vibration-isolating effect of the vibration-isolating member 10 can suppress transmission of vibrations (traveling vibrations) generated as the work vehicle 1 travels to the boarding portion 22. That is, the vibration-isolating effect of the vibration-isolating member 10 can suppress shaking of electrical components and the like disposed on the boarding portion 22 due to traveling vibrations.

[0032] <3. Quantum Compass> [3-1. Overview] As described above, in this embodiment, the work vehicle 1 is configured to be capable of autonomous driving. To enable the work vehicle 1 to drive autonomously, position information of the vehicle (host vehicle) is required. To enable the host vehicle's position information to be acquired, the work vehicle 1 of this embodiment is equipped with a quantum compass 11 (see FIG. 8, etc., described below). Note that in this embodiment, the work vehicle 1 is configured to be equipped with a quantum compass 11 for acquiring position information in order to enable autonomous driving, but this is merely an example. For example, the work vehicle 1 may be equipped with a quantum compass that enables the acquisition of position information for other reasons, such as recording work information by the work vehicle 1 or for theft prevention.

[0033] The quantum compass 11 is an electrically powered electrical component capable of measuring latitude and longitude. The quantum compass 11 is attached to the work vehicle 1 as an electrical component. The quantum compass 11 is not subject to restrictions on placement related to communication, as is the case when satellite information is used to acquire location information. For example, the quantum compass 11 can be placed in a location other than the top of the work vehicle 1, and can also be placed inside the vehicle. However, because the quantum compass 11 is an electrical component, it is preferable that it be placed in a location that is not exposed to, for example, rain, mud, exhaust fumes, etc. Taking these points into consideration, in this embodiment, the placement of the quantum compass 11 has been devised. Details of the placement of the quantum compass 11 will be described below using several examples.

[0034] In this embodiment, the work vehicle 1 is provided with one quantum compass 11. However, the work vehicle 1 may be provided with multiple quantum compasses 11. For example, two quantum compasses 11 may be arranged symmetrically front to back or left to right, and multiple quantum compasses 11 may be used for attitude control of the work vehicle 1.

[0035] Furthermore, the arrangement of the quantum compass 11 described below is not limited to a work vehicle 1 in which the driver's riding space formed by the riding section 22 is open to the outside, as in this embodiment, but can also be applied to a work vehicle 1A in which the riding section 22A is configured as a cabin type, as shown in Fig. 6. Note that Fig. 6 is a side view showing the general configuration of another form of work vehicle 1A to which the present invention can be applied. Furthermore, in a cabin-type work vehicle 1A, the driver's riding space formed by the riding section 22A is a room type space that is partitioned off from the outside.

[0036] Similar to the work vehicle 1 described above, the work vehicle 1A having a cabin-type riding section 22A also comprises a vehicle body 2, wheels 3, a prime mover 4, and a power transmission section 5. The vehicle body 2 has a base section 21 including a transmission case 212 and the like, and a riding section (cabin) 22A supported by the base section 21. Although hidden by the outer wall of the riding section 22A in FIG. 6 and not visible, the riding section 22A is provided with a seat section 221, a steering section 222, and a dashboard section 223 in the same configuration as in the work vehicle 1 described above. Similar to the work vehicle 1 described above, the riding section 22A is supported by the base section 21 via vibration-isolating members 10 (see FIG. 5).

[0037] Figure 7 is a perspective view showing the general configuration of the boarding base 220A in the cabin-type work vehicle 1A shown in Figure 6. Note that in Figure 7, for the purpose of facilitating understanding, a seat section 221 is attached to the boarding base 220A. As can be seen by comparing Figure 7 with the above-mentioned Figure 4, the boarding base 220A of the cabin-type work vehicle 1A also has a boarding section frame 2201A, a floor 2202A, a boarding section front wall 2203A, a boarding section rear wall 2204A, and left and right boarding section side walls 2205A, just like in the case of the above-mentioned work vehicle 1.

[0038] As can be seen from the above explanation, the cabin-type work vehicle 1A has a configuration similar to that of the work vehicle 1 of this embodiment. For this reason, it should be noted in advance that the arrangement of the quantum compass 11 described below is applicable not only to the work vehicle 1 of this embodiment, but also to the cabin-type work vehicle 1A. Furthermore, in the following, unless there is a particular need for such explanation, explanations related to the cabin-type work vehicle 1A will be omitted.

[0039] [3-2. Details of the quantum compass layout] 8 and thereafter, in this embodiment, the quantum compass 11 is provided in or around the seat section 221. The area around the seat section 221 is the area around the seat section 221 in the passenger section 22. In other words, the quantum compass 11 provided in or around the seat section 221 is provided in the passenger section 22.

[0040] As described above, the riding section 22 is supported by the base section 21 via the vibration-isolating member 10 (see FIG. 5) and has a vibration-isolating structure. That is, the quantum compass 11 disposed in or around the seat section 221 is disposed in a portion of the work vehicle 1 that has a vibration-isolating structure. This makes it possible to prevent a decrease in the accuracy of position measurement by the quantum compass 11 due to vibrations caused by the work vehicle 1 while traveling.

[0041] Furthermore, the seat section 221 and its surroundings correspond to a position surrounded by the front, rear, left, and right wheels 3 (four wheels 3) in the work vehicle 1. For this reason, by providing the quantum compass 11 in or around the seat section 221, the quantum compass 11 can be placed in a position surrounded by the four wheels 3. That is, according to the configuration of this embodiment, the quantum compass 11 can be placed as close as possible to the control point during autonomous driving, and autonomous driving can be controlled with reduced errors in vehicle position measurement using the quantum compass 11. The control point during autonomous driving is, for example, the center position of the four wheels 3.

[0042] 6, the seat section 221 or its surroundings can be located inside the cabin. For this reason, in the case of a cabin-type work vehicle 1A, by placing the quantum compass 11 in or around the seat section 221, the quantum compass 11, which is an electronic component, can be protected from rain, mud, exhaust gas, and the like.

[0043] On the other hand, in the work vehicle 1 of this embodiment, the quantum compass 11 provided in or around the seat section 221 may be placed in a position exposed to the outside of the work vehicle 1 where it may be exposed to rainwater, etc. When the quantum compass 11 is exposed to the outside in this way, it is preferable to provide a protective cover that covers the quantum compass 11 to protect it from rainwater, etc. The protective cover is preferably a waterproof cover that has been waterproofed.

[0044] Furthermore, it is preferable that the quantum compass 11 provided in the seat section 221 or its vicinity is placed in a location that does not impair the driver's visibility and is difficult for the driver to see. It is preferable that the quantum compass 11 provided in the seat section 221 or its vicinity is placed in a location that does not get in the way of the driver and does not impair the design of the passenger section 22.

[0045] Furthermore, the quantum compass 11 provided in or around the seat section 221 is preferably positioned on the bisector (center line) CL (see FIG. 2) that bisects the work vehicle 1 in the left-right direction in a plan view. This reduces the positional deviation of the quantum compass 11 from the control point during autonomous driving, and prevents the process of determining the vehicle's position using the quantum compass 11 from becoming complicated. In other words, the control process for autonomous driving can be simplified.

[0046] Furthermore, the periphery of the seat section 221 is preferably above the floor 2202. That is, the quantum compass 11 provided around the seat section 221 is preferably provided above the floor 2202. By providing the quantum compass 11 above the floor 2202, the maintainability of the quantum compass 11 can be improved. However, the quantum compass 11 provided around the seat section 221 may be located below the floor 2202 as long as it is provided in the boarding section 22.

[0047] The following describes the layout structure of the quantum compass 11 placed in or around the seat section 221, with reference to specific examples.

[0048] (3-2-1. First Example) Fig. 8 is a vertical cross-sectional view schematically showing a first example of the arrangement of the quantum compass 11. As shown in Fig. 8, the seat 221 has a seat 2211 having a seat surface 221a, and a seat support 2212 that supports the seat 2211. In this example, the seat support 2212 is supported by the floor 2202 (upper floor 2202b). The seat 221 further has a backrest 2213.

[0049] The seat surface 221a is a portion on which the driver places his / her buttocks. The seat support portion 2212 may simply be a cylindrical base that supports the seat portion 2211, but may have other configurations. For example, the seat support portion 2212 may be composed of an adjustment mechanism that adjusts the position of the seat portion 2211, and an outer circumferential wall that surrounds the adjustment mechanism. The adjustment mechanism may be a mechanism that can adjust at least one of the up-down direction and the front-back direction of the seat portion 2211. When the adjustment mechanism is configured to be able to adjust the position of the seat portion 2211 in the up-down direction, it is preferable that the outer circumferential wall be composed of an elastic member such as a rubber member that can expand and contract up and down. The backrest portion 2213 is a portion that serves as a backrest for the driver sitting on the seat portion 2211.

[0050] 8, quantum compass 11 is disposed between seat surface 221a of seat 221 and floor 2202. In other words, quantum compass 11 is disposed between seat surface 221a and the upper surface of floor 2202 in the vertical direction.

[0051] By configuring the quantum compass 11 to be disposed between the seat surface 221a and the floor 2202, the quantum compass 11 can be disposed in a position that is less likely to be in the driver's field of view. Furthermore, with this configuration, the quantum compass 11 can be disposed in a position that is less likely to be seen by others, and it is possible to prevent the placement of the quantum compass 11 from deteriorating the design of the riding section 22. Furthermore, with this configuration, the quantum compass 11 can be disposed as low as possible in the riding section 22. As a result, it is possible to minimize the amount of displacement of the quantum compass 11 when the vehicle body 2 tilts, and to prevent a decrease in the accuracy of position measurement by the quantum compass 11.

[0052] In the example shown in FIG. 8 , the quantum compass 11 is supported by the floor 2202. That is, the quantum compass 11 is arranged around the seat section 221. The quantum compass 11 may be attached directly to the floor 2202 or indirectly via a support member. The method of attaching the quantum compass 11 to the floor 2202 or the support member is not particularly limited, but may be a method using a fastener such as a bolt, or by adhesive bonding, etc. Furthermore, the method of attaching the support member to which the quantum compass 11 is attached to the floor 2202 may also be a method using a fastener such as a bolt, or by adhesive bonding, etc. By configuring the quantum compass 11 to be supported by the floor 2202, it is easy to ensure installation space and to easily install the quantum compass 11. Furthermore, this configuration allows the quantum compass 11 to be stably supported.

[0053] 8, the quantum compass 11 supported by the floor 2202 is preferably disposed in a position surrounded by the outer wall that constitutes the seat support section 2212. This prevents the driver from accidentally coming into contact with the quantum compass 11 and prevents deterioration of the design of the riding section 22. Furthermore, this configuration prevents rainwater and the like from getting on the quantum compass 11 without providing a protective cover.

[0054] In this example, the quantum compass 11, which is disposed between the seat surface 221a and the floor 2202, is configured to be disposed on the floor 2202, but this is merely an example. The quantum compass 11 may also be disposed on the seat 221. For example, the quantum compass 11 may be supported by the seat support 2212. In this case, the quantum compass 11 can be configured to be disposed inside the seat support 2212. This configuration makes it possible to prevent rainwater and the like from getting on the quantum compass 11 without providing a protective cover. This also makes it possible to prevent the driver from accidentally coming into contact with the quantum compass 11 and to prevent deterioration of the design of the passenger section 22.

[0055] As described above, the seat support part 2212 may have an adjustment mechanism for adjusting the position of the seat part 2211. In such cases, the seat support part 2212 will include a portion whose position is displaced by adjustment using the adjustment mechanism. When the quantum compass 11 is supported by the seat support part 2212 having such a portion whose position is displaced, it is preferable that the quantum compass 11 be positioned so as to avoid the portion whose position is displaced.

[0056] (3-2-2. Second Example) Fig. 9 is a schematic diagram for explaining a second embodiment of the arrangement of quantum compass 11, showing seat section 221 and its surroundings in an exploded view. Fig. 10 is a vertical cross-sectional view schematically showing a second embodiment of the arrangement of quantum compass 11. Fig. 10 is a vertical cross-sectional view of a structure obtained after assembling elements 221, 225, and 2202 shown in Fig. 9.

[0057] In the second embodiment, the work vehicle 1 is equipped with a seat pan 225. The seat pan 225 is disposed on the floor 2202 and supports the seat portion 221. The seat pan 225 is detachably attached to the floor 2202. Specifically, the seat pan 225 is disposed on the upper floor 2202b so as to cover from above a floor opening 2202d that penetrates the upper floor 2202b in the vertical direction. The floor opening 2202d is provided for purposes such as facilitating maintenance of components disposed below the floor 2202, such as hydraulic system piping. The seat pan 225 is detachably attached to the upper floor 2202b using fasteners such as bolts. In the example shown in FIGS. 9 and 10 , the seat pan 225 is a rectangular box-like structure in a plan view, but the shape of the seat pan 225 may be modified as appropriate. For example, the seat pan 225 may be a simple plate-like structure.

[0058] In the second embodiment, the quantum compass 11 is supported by the seat pan 225. With this configuration, as in the first embodiment, the quantum compass 11 can be disposed between the seat surface 221a and the floor 2202, around the seat section 221. As a result, as in the first embodiment, the quantum compass 11 can be disposed in a position that is unlikely to be in the driver's field of view, and it is possible to prevent the placement of the quantum compass 11 from deteriorating the design of the passenger section 22. Furthermore, with this configuration, the quantum compass 11 can be disposed as low as possible in the passenger section 22, which reduces the displacement of the quantum compass 11 when the vehicle body 2 tilts.

[0059] The method of attaching the quantum compass 11 to the seat pan 225 is not particularly limited, but may be a method using fasteners such as bolts, or adhesive bonding. The quantum compass 11 may also be attached to the seat pan 225 via a support member. In the second embodiment, as in the first embodiment, the quantum compass 11 supported by the seat pan 225 is preferably disposed in a position surrounded by the outer peripheral wall that constitutes the seat support portion 2212.

[0060] (3-2-3. Third Example) 11 is a vertical cross-sectional view showing a schematic diagram of a third embodiment of the arrangement of the quantum compass 11. As shown in FIG. 11, in the third embodiment, the quantum compass 11 is arranged behind the seat 221. By configuring it in this manner, the quantum compass 11 can be arranged in a position that is not visible to the driver sitting in the seat 221, and a configuration can be achieved that does not obstruct the driver's field of vision. Note that in this example, the quantum compass 11 is also arranged around the seat 221.

[0061] Specifically, quantum compass 11 is disposed between seat 221 and passenger section rear wall 2204 (in the front-to-rear direction). Quantum compass 11 is disposed between the rear surface of seat 221 and the front surface of passenger section rear wall 2204. The rear surface of seat 221 is made up of the rear surface of backrest 2213 and the rear surface of seat support 2212. Quantum compass 11 can be disposed by effectively utilizing the space formed between seat 221 and passenger section rear wall 2204.

[0062] More specifically, the quantum compass 11 is supported on the rear wall 2204 of the passenger compartment via the support member 12. This allows the quantum compass 11 to be mounted in a relatively large space behind the seat 221, making it easy to mount the quantum compass 11. Furthermore, this configuration allows the quantum compass 11 to be stably supported without the need to provide a new, strong support structure. In this embodiment, the quantum compass 11 is configured to be indirectly mounted on the rear wall 2204 of the passenger compartment via the support member 12, but the quantum compass 11 may also be mounted directly on the rear wall 2204 of the passenger compartment. The mounting of the quantum compass 11 to the support member 12 and the mounting of the support member 12 to the rear wall 2204 of the passenger compartment may be performed using, but is not limited to, fasteners such as bolts, adhesives, or the like.

[0063] In this example, the support member 12 also serves as a protective cover to prevent rainwater and the like from getting on the quantum compass 11. However, a protective cover may be provided separately from the support member 12. Furthermore, in the case of a cabin-type work vehicle 1A or the like, where rainwater does not get on the quantum compass 11, the protective cover may not be necessary.

[0064] The quantum compass 11 disposed between the seat 221 and the rear wall 2204 of the passenger compartment in the front-to-rear direction may be supported by the floor 2202 or the seat 221 instead of the rear wall 2204 of the passenger compartment.

[0065] (3-2-4. Fourth Example) Fig. 12 is a schematic diagram for explaining a fourth embodiment of the arrangement of the quantum compass 11. Fig. 12 is a side view of the right boarding section side wall 2205 (see Figs. 2 and 3) constituting the boarding section 22 (boarding base 220) as viewed from the right (from the seat section 221 side). As shown in Fig. 12 (also see Fig. 2), a side cover 226 is detachably attached to the right boarding section side wall 2205. In particular, the side cover 226 functions as a lever guide that guides the movement of a lever (not shown) provided on the right side of the seat section 221.

[0066] Fig. 13 is a schematic cross-sectional view taken along the line XIII-XIII in Fig. 12. As shown in Fig. 13, in the fourth embodiment, the quantum compass 11 is disposed in a space IS provided between the side cover 226 and the right-side passenger section sidewall 2205. The quantum compass 11 is disposed in an internal space IS formed by attaching the side cover 226 to the right-side passenger section sidewall 2205. Note that in this example, the quantum compass 11 is disposed on the right side of the seat 221 (an example of the periphery of the seat 221), but a similar internal space IS may be provided on the left side of the seat 221, and the quantum compass 11 may be disposed on the left side of the seat 221.

[0067] By arranging the quantum compass 11 in the internal space IS formed by attaching the side cover 226 to the riding section side wall 2205, the quantum compass 11 can be arranged in a position where it is less likely to be splashed with rainwater, mud, and the like. Furthermore, with this configuration, the quantum compass 11 can be arranged in a position that is not visible to the driver sitting in the seat section 221, and the driver's field of vision can be unobstructed. Furthermore, with this configuration, it is possible to prevent the arrangement of the quantum compass 11 from impairing the design of the riding section 22. Furthermore, with this configuration, the harness (not shown) connected to the quantum compass 11 can also be hidden by the side cover 226. Furthermore, by attaching the quantum compass 11 to the riding section side wall 2205, the quantum compass 11 can be stably supported without the need to provide a new, strong support structure.

[0068] In this example, the quantum compass 11 is disposed on the left side surface of the right-side riding section sidewall 2205. However, the quantum compass 11 may be disposed in another position, such as on the top surface or front surface of the right-side riding section sidewall 2205. The quantum compass 11 is preferably disposed in a position that is visible from above, the front, or the side (the left in this example) when the side cover 226 is removed. With this configuration, the quantum compass 11 can be easily attached, detached, or maintained by removing the side cover 226. Furthermore, the quantum compass 11 may be disposed on the inner surface of the side cover 226 instead of the right-side riding section sidewall 2205.

[0069] Furthermore, quantum compass 11 may be attached directly to right-side riding section side wall 2205, or may be attached via a support member to right-side riding section side wall 2205. These attachment methods are not particularly limited, but may use, for example, fasteners such as bolts, adhesives, or the like.

[0070] <4. Things to keep in mind> Various modifications can be made to the various technical features disclosed in this specification without departing from the spirit of the technical creation. Furthermore, multiple embodiments, examples, and modifications shown in this specification can be combined to the extent possible.

[0071] <5. Notes> An exemplary work vehicle of the present invention may be configured (first configuration) to include a passenger section having a floor, a seat section supported by the floor, and a quantum compass provided in or around the seat section.

[0072] In the work vehicle of the first configuration described above, the periphery of the seat may be configured to be above the floor (second configuration).

[0073] In the work vehicle of the first or second configuration, the quantum compass may be arranged between the seat surface of the seat portion and the floor (third configuration).

[0074] In the work vehicle of the third configuration described above, the seat portion may have a seat portion having the seat surface and a seat support portion that supports the seat portion, and the quantum compass may be configured to be supported by the seat support portion (fourth configuration).

[0075] The work vehicle of the third configuration may be configured (fifth configuration) to include a seat pan that is placed on the floor and supports the seat portion, and the quantum compass is supported by the seat pan.

[0076] In the work vehicle of any one of the first to third configurations described above, the quantum compass may be configured to be supported on the floor (sixth configuration).

[0077] In the work vehicle of the first or second configuration, the quantum compass may be arranged behind the seat (seventh configuration).

[0078] In the work vehicle of the seventh configuration, the boarding section may have a rear wall of the boarding section arranged behind the seat section, and the quantum compass may be arranged between the seat section and the rear wall of the boarding section (eighth configuration).

[0079] In the work vehicle of the eighth configuration, the quantum compass may be supported on the rear wall of the riding section via a support member (ninth configuration).

[0080] The work vehicle of any one of the first to ninth configurations above may be configured (ninth configuration) to include a base portion that supports the riding portion via a vibration-isolating member. [Explanation of symbols]

[0081] 1, 1A...Work vehicle 10. Vibration-isolating member 11. Quantum Compass 12 Support member 21 Base 22, 22A... Boarding area 221 Seat 221a···Seat 225···Seat pan 2202, 2202A Floor 2204, 2204A...Rear wall of boarding area 2211... Seat part 2212...Seat support part

Claims

1. a boarding section having a floor; a seat supported by the floor; a quantum compass provided in or around the seat; A work vehicle equipped with:

2. The work vehicle according to claim 1 , wherein the periphery of the seat is above the floor.

3. The work vehicle according to claim 1 , wherein the quantum compass is disposed between a seat surface of the seat portion and the floor.

4. The seat portion is a seat portion having the seat surface; a seat support portion that supports the seat portion; and The work vehicle according to claim 3 , wherein the quantum compass is supported by the seat support.

5. a seat pan disposed on the floor and supporting the seat section; The work vehicle of claim 3 , wherein the quantum compass is supported on the seat pan.

6. The work vehicle of claim 1 , wherein the quantum compass is supported on the floor.

7. The work vehicle according to claim 1 , wherein the quantum compass is disposed behind the seat.

8. the boarding section has a boarding section rear wall disposed behind the seat section, The work vehicle according to claim 7 , wherein the quantum compass is disposed between the seat section and the rear wall of the passenger section.

9. The work vehicle according to claim 8 , wherein the quantum compass is supported on the rear wall of the riding section via a support member.

10. The work vehicle according to claim 1 , further comprising a base portion that supports the riding portion via a vibration-isolating member.

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