Work vehicle

Abstract

We provide highly convenient work vehicles. [Solution] The device comprises a machine body 1, running gears located on both the left and right sides of the machine body 1, and a detachable object V located between the left and right running gears and detachable from the machine body. The detachable object V has auxiliary wheels 35 that make contact with the ground when the detachable object V is detached from the machine body and assist in the movement of the detachable object.

Description

Technical Field

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[0001] The present invention relates to a work vehicle suitable for traveling on a work site with many irregularities or an inclined work site.

Background Art

[0002] An example of a work vehicle is disclosed in Patent Document 1. In Patent Document 1, it includes left and right traveling devices (referred to as "wheels" in the patent document) and hydraulic equipment (referred to as "hydraulic pump" and "cylinder control valve" in Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] [[ID=3,4]] Among work vehicles suitable for traveling on a work site with many irregularities or an inclined work site, those driven by electric power stored in a battery are known. In such a work vehicle, when the battery is built-in or fixed, the work vehicle cannot be used during battery charging. Therefore, it is preferable that the battery has a detachable configuration.

[0005] However, batteries used in work vehicles are often relatively heavy. Therefore, in replacing the battery, the operator has to carry the heavy battery, which is inconvenient.

[0006] Therefore, an object of the present invention is to provide a work vehicle in which the attachment and detachment of attachments are easy and the convenience is high.

Means for Solving the Problems

[0007] The characteristic configuration of the work vehicle according to the present invention comprises a machine body, running gears located on both the left and right sides of the machine body, and a detachable part located between the left and right running gears and detachable from the machine body, wherein the detachable part has auxiliary wheels that make contact with the ground when the detachable part is detached from the machine body and assist in the movement of the detachable part.

[0008] According to the present invention, the detachable object has auxiliary wheels. With this configuration, the worker can transport the detachable object using the auxiliary wheels. As a result, the worker does not need to lift the detachable object, making the work easier. Examples of detachable objects include batteries, chemical tanks for spraying, engine units, etc.

[0009] The characteristic configuration of the work vehicle according to the present invention is that it is equipped with a human-operated device that allows the running device to be operated manually, the human-operated device is provided at one end of the machine in the front-rear direction, and the attachment and detachment items are preferably attached to and detached from the machine from the opposite side of the end of the machine in the front-rear direction from which the human-operated device is provided.

[0010] Since manual operating tools are used to operate work vehicles, they are placed in a position that is relatively easy for workers to operate. To ensure the operability of manual operating tools, it is preferable not to place anything that would hinder their operation around them.

[0011] According to the present invention, attachments and detachments are made from the opposite side of the manual operating tool. This configuration is convenient because the attachment and detachment of attachments and detachments do not interfere with the operation of the manual operating tool.

[0012] A characteristic feature of the work vehicle according to the present invention is that the detachable part can be removed from the machine by pulling it towards the front of the machine.

[0013] According to the present invention, attachments can be removed by pulling them forward. With this configuration, attachments will not unexpectedly detach due to the machine's forward movement. As a result, the operator can continue working stably.

[0014] A characteristic configuration of the work vehicle according to the present invention is that the detachable part preferably has a locking mechanism on the front side of the machine body for fixing the detachable part to the machine body.

[0015] According to the present invention, the locking mechanism is located on the front side of the machine body when attaching or detaching the device. This makes it easier to prevent forgetting to lock the device compared to when the locking mechanism is located on the rear side, as the locking mechanism is located closer to the operator.

[0016] The characteristic configuration of the work vehicle according to the present invention is that the detachable part supports the auxiliary wheels and has an auxiliary wheel support mechanism that can change the posture between a stowed position in which the auxiliary wheels are separated from the ground and a running position in which the auxiliary wheels are in contact with the ground, and it is preferable that the auxiliary wheel support mechanism changes the auxiliary wheels to the stowed position when the detachable part is attached to the machine body.

[0017] According to the present invention, the auxiliary wheel support mechanism can be changed between a stowed position and a running position. As a result, when the work vehicle is running with attachments mounted on the machine body, the auxiliary wheels are reliably lifted off the ground, allowing the work vehicle to run stably.

[0018] The characteristic configuration of the work vehicle according to the present invention is such that the detachable part has a rotating body that can be driven to rotate, the machine body has a guide part that guides the rotating body, and the guide part has an inclined portion that is located higher towards the rear of the machine body.

[0019] According to the present invention, the rotating body is guided along the inclined section. This allows the worker to move the attachment / detachment object to a higher position relative to the ground simply by pushing it in the forward and backward directions, and then attach the attachment / detachment object to the worker.

[0020] The characteristic configuration of the work vehicle according to the present invention is that it is equipped with hydraulic equipment supported by the machine body, and the detachable parts are preferably located below the hydraulic equipment.

[0021] Generally, the detachable object is often a relatively heavy weight. Such a heavy object is likely to affect the overall weight balance of the work vehicle. Also, when the center of gravity is at a high position, the work vehicle is likely to tip over.

[0022] According to the present invention, the detachable object is located below the hydraulic equipment. Thereby, the center of gravity of the entire work vehicle can be kept low, and the vehicle can run stably.

[0023] The characteristic configuration of the work vehicle according to the present invention is that the detachable object includes a main body portion located below the hydraulic equipment in a state where the detachable object is attached to the machine body, a handle portion provided at one end side of the main body portion, and the auxiliary wheel provided at the other end side of the main body portion. It is preferable that the upper end of the handle portion is located above the upper end of the main body portion.

[0024] According to the present invention, when an operator pulls up the handle portion, the main body portion inclines, and the detachable object is supported on the ground via the auxiliary wheel. Thereby, compared with a configuration for lifting the detachable object, the operator can move the detachable object around with a relatively light force. Also, since the upper end of the handle portion is located above the upper end of the main body portion, the work vehicle can hold the handle portion in a comfortable posture.

Brief Description of the Drawings

[0025] [Figure 1] It is a side view of the work vehicle. [Figure 2] It is a plan view of the work vehicle. [Figure 3] It is a front view of the work vehicle. [Figure 4] It is a plan view of the support mechanism. [Figure 5] It is a side view of the support mechanism. [Figure 6] It is a side view showing the traveling posture of the auxiliary wheel support mechanism. [Figure 7] It is a plan view showing the mounting of the battery. [Figure 8] It is a side view showing the storage of the auxiliary wheel support mechanism during battery mounting. [Figure 9]This is a side view showing the retracted position of the auxiliary wheel support mechanism. [Figure 10] This is a bottom view showing the main parts of the aircraft with the battery installed. [Modes for carrying out the invention]

[0026] In the following explanation, unless otherwise specified, the direction of arrow F in the diagram will be considered "forward," the direction of arrow B will be considered "backward," the direction of arrow L will be considered "left," the direction of arrow R will be considered "right," the direction of arrow U will be considered "up," and the direction of arrow D will be considered "down."

[0027] As shown in Figure 1-3, the work vehicle comprises a machine body 1 that is roughly rectangular in plan view, running wheels 2 (the "running device" according to the present invention) located on both the left and right sides of the machine body 1, a plurality of driven wheels 3 provided corresponding to each of the plurality of running wheels 2, a support mechanism A that supports the plurality of running wheels 2 in a state in which their position relative to the machine body 1 can be individually changed, a plurality of hydraulic motors 4 that drive the running wheels 2, and a battery V (the "detachable part" according to the present invention).

[0028] The running wheels 2 are located at the front and rear on both the left and right sides of the machine body 1. In this embodiment, the work vehicle is equipped with four running wheels 2: left front, right front, left rear, and right rear. The running wheels 2 rotate around the horizontal axis X3.

[0029] Support mechanism A is supported by the machine body 1. In this embodiment, the work vehicle is equipped with four support mechanisms A corresponding to the four running wheels 2: left front, right front, left rear, and right rear. Support mechanism A includes an articulated link mechanism 5 and a plurality of hydraulic cylinders 6, 7 that can individually change the posture of the articulated link mechanism 5.

[0030] Furthermore, the structure of the driving wheels 2, driven wheels 3, and support mechanism A of the work vehicle in this embodiment is symmetrical front to back, and the work vehicle can travel in both the forward and backward directions as defined in the figure.

[0031] The aircraft body 1 is equipped with a cargo platform 8 on which cargo can be placed. The cargo platform 8 is located on the upper surface of the aircraft body 1.

[0032] The machine body 1 is equipped with hydraulic equipment C as a device for supplying hydraulic fluid to the hydraulic motor 4 and hydraulic cylinders 6 and 7. Hydraulic equipment C includes an oil tank for storing hydraulic fluid, a hydraulic control valve 13 (an example of a valve) for adjusting the amount of hydraulic fluid supplied, and a hydraulic pump for supplying hydraulic fluid to the hydraulic motor 4 and hydraulic cylinders 6 and 7. Hydraulic equipment C is supported by the machine body 1 and is located under the loading platform 8. When hydraulic equipment C is driven, the hydraulic pump is activated, and the hydraulic motor 4 and hydraulic cylinders 6 and 7 are activated via the hydraulic control valve 13.

[0033] A battery V is located below the hydraulic equipment C. The battery V is positioned between the left and right running wheels 2 and is configured to be detachable from the machine body 1.

[0034] The machine body 1 is equipped with a lever-shaped operating lever 10 (the "manual operating device" according to the present invention) at one end in the front-rear direction for manually operating the running wheels 2. In this embodiment, the operating lever 10 is located at the rear end of the machine body 1. By tilting the operating lever 10 forward, backward, left, or right, the machine body 1 moves in those directions. The operating lever 10 is not limited to a lever shape and may be in the form of, for example, a touch panel. In this case, the machine body 1 may be made to move in any direction by touching the touch panel, or it may be configured to automatically move to any point. Furthermore, the height of the machine body 1 in the vertical direction may be controlled by controlling hydraulic equipment C.

[0035] [Support mechanism] As described above, the support mechanism A comprises an articulated link mechanism 5 and a plurality of hydraulic cylinders 6 and 7. As shown in Figure 1, the plurality (specifically four) of running wheels 2 are supported via the articulated link mechanism 5 in a manner that allows each wheel to be individually repositioned relative to the machine body 1.

[0036] As shown in Figures 4 and 5, the articulated link mechanism 5 includes a base end 14 supported by the machine body 1, a first link 15 whose upper end is supported at the lower part of the base end 14 so as to be rotatable around a horizontal axis X1, and a second link 16 whose one end is supported at the lower end of the first link 15 so as to be rotatable around a horizontal axis X2 and whose other end supports a running wheel 2.

[0037] As shown in Figure 5, the support bracket 17 that supports the running wheel 2 is supported by a boss portion 18 provided on the swing-side end (other end) of the second link 16 so as to be able to swing around the vertical axis Y1. A hydraulic cylinder for swivel operation (hereinafter referred to as the swivel cylinder 20) is provided extending from the bracket 19 on one end of the second link 16 to the arm portion 17a provided on the support bracket 17.

[0038] Each of the multiple articulated link mechanisms 5 is provided with multiple hydraulic cylinders 6 and 7 that can individually change the attitude of each articulated link mechanism 5. Specifically, there is a first hydraulic cylinder 6 that can change the swinging attitude of the first link 15 relative to the aircraft body 1, and a second hydraulic cylinder 7 that can change the swinging attitude of the second link 16 relative to the first link 15.

[0039] When the operation of the second hydraulic cylinder 7 is stopped and the first hydraulic cylinder 6 is extended or retracted, the first link 15, the second link 16, and the running wheel 2 each oscillate together around the horizontal axis X1 of the pivot connection point to the base end 14 while maintaining a constant relative posture. When the operation of the first hydraulic cylinder 6 is stopped and the second hydraulic cylinder 7 is extended or retracted, the posture of the first link 15 is maintained constant, and the second link 16 and the running wheel 2 oscillate together around the horizontal axis X2 of the connection point between the first link 15 and the second link 16.

[0040] A driven wheel 3 is rotatably supported at the intermediate bending portion of each of the multiple bending link mechanisms 5. The driven wheel 3 is made up of a wheel with approximately the same outer diameter as the running wheel 2. The pivot shaft that pivotally connects the first link 15 and the second link 16 is extended so as to protrude outward in the width direction of the vehicle body, and the driven wheel 3 is rotatably supported at the extended protruding portion of the pivot shaft.

[0041] By operating the swivel cylinder 20, the travel wheels 2 can be rotated around the vertical axis Y1 relative to the articulating link mechanism 5, thereby enabling a swivel operation.

[0042] The hydraulic control valve 13, which corresponds to the hydraulic motor 4, adjusts the flow rate of the hydraulic fluid, thereby changing the rotational speed of the hydraulic motor 4, and thus the rotational speed of the running wheels 2.

[0043] Since the following explanation is symmetrical, we will only describe one side (left or right) based on the diagram.

[0044] [Battery structure] As shown in Figure 6, the battery V has a main body 31 located below the hydraulic equipment C when mounted on the aircraft body 1, a handle 30 provided on the front end of the main body 31, and auxiliary wheels 35 provided on the rear end of the main body 31. Battery cells and the like are provided inside the main body 31, and it can be connected to the aircraft body 1 by a harness or the like at its front end.

[0045] A handle portion 30 for the operator to hold is provided on the front side of the battery V. The handle portion 30 is shaped like a pipe-shaped member bent into a U shape and is connected to the lower side of the main body portion 31.

[0046] As shown in Figure 7, the battery V has a locking mechanism 34 on its front side that secures the battery V to the aircraft body 1. The locking mechanism 34 has an L-shaped locking portion 41, an elastic member 42 that biases the locking portion 41, and a locking hole through which the locking portion 41 is inserted. The locking hole is provided at the lower end of the handle portion 30 and the lower end of the aircraft body 1, and the elastic member 42 biases the locking portion 41 in the direction that inserts it into the locking hole. The locking portion 41 is configured to be insertable into the locking hole provided in the aircraft body 1.

[0047] Specifically, a locking portion 41 is provided on the left-right inner side of the handle portion 30, and the longer side of the locking portion 41 extends in the left-right direction. The elastic member 42 biases the locking portion 41 toward the outside of the aircraft body. The locking portion 41 penetrates the handle portion 30 and is inserted into a lock hole provided in the aircraft body 1. By pulling the locking portion 41 toward the inside of the aircraft body against the biasing force of the elastic member 42, the locking portion 41 can be pulled out of the lock hole provided in the aircraft body 1, and the fixing of the battery V to the aircraft body 1 by the lock mechanism 34 can be released. The lock mechanism 34 is provided on the underside of the handle portion 30.

[0048] As shown in Figure 8, below the main body 31, the battery V has auxiliary wheels 35 that make contact with the ground when the battery V is detached from the aircraft body 1 and assist in the movement of the battery V, a driven-rotatable first rotating body 32 (the "rotating body" according to the present invention), an auxiliary wheel support mechanism 33 provided inside the aircraft body from the first rotating body 32, which supports the auxiliary wheels 35 and can change its posture between a stowed position where the auxiliary wheels 35 are separated from the ground and a running position where the auxiliary wheels 35 are in contact with the ground, and a first guide part 37 provided on the front side of the main body 31. The auxiliary wheels 35 are provided at the rear end of the battery V and are configured to rotate around a horizontal axis X4. The auxiliary wheels 35 are provided on the opposite side in the front-rear direction from the handle part 30. The first rotating body 32 is located outward in the left-right direction from the auxiliary wheels 35 and the auxiliary wheel support mechanism 33.

[0049] [Auxiliary wheel support mechanism] As shown in Figures 8 and 9, the battery V has auxiliary wheels 35 on both the left and right sides of its lower side, an auxiliary wheel support mechanism 33, and a biasing member (not shown) that biases the auxiliary wheel support mechanism 33. The auxiliary wheel support mechanism 33 is supported so as to be able to swing around the horizontal axis X5 and supports the auxiliary wheels 35 at its free end. The biasing member biases the auxiliary wheel support mechanism 33 toward the driving posture. The regulating member 36 is provided on the rear and lower side of the horizontal axis X5 and restricts the swinging of the auxiliary wheel support mechanism 33. Specifically, when the auxiliary wheel support mechanism 33 swings toward the rear, the auxiliary wheel support mechanism 33 comes into contact with the regulating member 36. This restricts the counterclockwise swinging of the auxiliary wheel support mechanism 33 in Figure 8. The biasing member is made of a coil spring or the like.

[0050] In the running position, the horizontal axis X5 of the auxiliary wheel support mechanism 33 is located in front of the horizontal axis X4. In the stowed position, the horizontal axis X5 is located behind the horizontal axis X4. When the battery V is attached to the machine body 1, or in the running position, the upper end of the handle portion 30 is located above the upper end of the main body portion 31. This allows the operator to grip the handle portion 30 in a relatively comfortable posture without bending over. As shown in Figure 6, when the handle portion 30 is lifted by the operator, the auxiliary wheels 35 are located directly below or behind the horizontal axis X5 in the front-rear direction.

[0051] With the battery V attached to the aircraft body 1, the upper end of the handle portion 30 is positioned below the cargo bed portion 8. This prevents interference between the cargo and the handle portion 30 when placing cargo that is larger than the cargo bed portion 8 in a plan view.

[0052] [Aircraft structure] As shown in Figures 8 and 9, the machine body 1 has a second guide part 50 (the "guide part" according to the present invention) on the underside of the machine body 1 that guides the first rotating body 32 to a predetermined position to lock the battery V, and a second rotating body 51 that is driven to rotate. The second guide part 50 is located on the rear side of the machine body 1, and the second rotating body 51 is located on the front side of the machine body 1. The second guide part 50 and the second rotating body 51 are positioned approximately horizontally in the vertical direction. When the battery V is mounted on the machine body 1, the first rotating body 32 and the second rotating body 51 are located approximately the same position in the left-right direction (see Figure 10). That is, the first rotating body 32 and the second rotating body 51 are located outward from the auxiliary wheel support mechanism 33 in the left-right direction. In this embodiment, the first rotating body 32 and the second rotating body 51 are made of bearings, but are not limited to this.

[0053] [1st Information Department] As shown in Figures 8, 9, and 10, the first guide portion 37 has a horizontal plate 37a that contacts the second rotating body 51 provided on the machine body 1, a vertical plate 37b that is located towards the center of the left-right direction of the machine body towards the rear, and a front locking portion 37c that locks the horizontal plate 37a and the vertical plate 37b to the main body portion 31. The rear end of the handle portion 30 is fixed to the main body portion 31 by a locking portion 41.

[0054] The horizontal plate 37a is shaped by bending a flat plate-like member and has a first inclined portion 39 located higher towards the rear and a contact portion 38 at the front that contacts the second rotating body 51. When the battery V is attached to the machine body 1, the second rotating body 51 passes below the first inclined portion 39 along the first inclined portion 39. When the second rotating body 51 passes below the first inclined portion 39, the front side of the battery V is supported by the second rotating body 51 at the first guide portion 37, and the front side of the battery V rises relative to the ground by the amount of the inclination of the first inclined portion 39.

[0055] The contact portion 38 is in contact with the second rotating body 51 when the battery V is attached to the aircraft body 1.

[0056] The front locking portion 37c is formed in the shape of a bent plate member, extending in the front-to-back direction and forming a gate shape with the inside of the machine open. The front locking portion 37c has a vertical side surface 45, and the rear end of the handle portion 30 is located inside the vertical side surface 45, in other words, in the space enclosed by the main body portion 31 and the front locking portion 37c. A horizontal plate 37a and a vertical plate 37b are located on the left-right outer side of the vertical side surface 45.

[0057] [Second Information Department] As shown in Figures 8, 9, and 10, the second guide portion 50 is located at the rear end of the machine, and the second rotating body 51 is located at the front end of the machine. The second guide portion 50 has a shape formed by bending a flat plate and has an inclined portion 50a that is located higher towards the rear, and a fixed portion 50b that is continuous with the rear end of the inclined portion 50a, extends upward, and is bent forward at its upper end.

[0058] By pushing the battery V from the front of the aircraft 1, the first rotating body 32 attached to the battery V slides over the inclined portion 50a while rotating under its own power. The battery V is fixed when the first rotating body 32 comes into contact with the fixing portion 50b. When the battery V is attached to the aircraft 1, the first rotating body 32 comes into contact with the fixing portion 50b, and the auxiliary wheel support mechanism 33 comes into contact with the storage pin 52 attached to the aircraft 1, resulting in the stored position. The auxiliary wheel support mechanism 33 can change its attitude by moving away from the ground by the amount of the inclination of the inclined portion 50a relative to the ground.

[0059] The second guide section 50 has a retraction pin 52 at its rear end, which is a rod-shaped member bent into an L shape. The retraction pin 52 is located below the second guide section 50 and extends inward in the left-right direction. The auxiliary wheel support mechanism 33 comes into contact with the retraction pin 52 when the battery V is mounted on the aircraft body 1. As shown in Figure 9, when the battery V is mounted on the aircraft body 1, the retraction pin 52 is located in front of the horizontal axis X5. The auxiliary wheel support mechanism 33, which has come into contact with the retraction pin 52 from the front (see Figure 8), is then pushed further towards the rear, causing the auxiliary wheel support mechanism 33 to swing forward (see Figure 9). As a result, the auxiliary wheel support mechanism 33 changes its posture to the retracted position.

[0060] The auxiliary wheels 35 and the auxiliary wheel support mechanism 33 are located to the left and right inward of the first rotating body 32 and the second rotating body 51 in the left-right direction. In a side view, the front running wheel 2 overlaps with the first guide section 37 and the second rotating body 51. In a side view, the rear running wheel 2 overlaps with the second guide section 50 and the first rotating body 32.

[0061] [Coordination between the guide unit and the rotating body when the battery is installed] As shown in Figure 7, the operation of the battery V and the aircraft 1 when the battery V is installed will be explained. The battery V is attached to and detached from the aircraft from the opposite side (front end) of the rear end, which is one end in the front-to-rear direction where the operating lever 10 of the aircraft 1 is located. In other words, the battery V can be attached to the aircraft 1 by pushing it from the front.

[0062] When the battery V is pushed into the machine body 1 from the front, the rear of the battery V passes between the running wheels 2 and reaches below the hydraulic equipment C. At this time, the auxiliary wheel support mechanism 33 is located inside the machine body relative to the second rotating body 51 and therefore does not come into contact with the second rotating body 51.

[0063] When the battery V is pushed further backward while the first rotating body 32 is positioned at the front end of the second guide portion 50, the first rotating body 32 rides onto the inclined portion 50a. At this time, the rear end of the first guide portion 37 is positioned above the second rotating body 51, and the pushing operation causes the second rotating body 51 to push the front side of the battery V upward via the first guide portion 37.

[0064] The lateral position of the battery V relative to the aircraft body 1 is determined by the vertical plate 37b. Specifically, when the second rotating body 51 pushes the front side of the battery V upward, the vertical plate 37b comes into contact with the second rotating body 51. As described above, the vertical plate 37b is located closer to the center of the aircraft body in the lateral direction towards the rear, so when the battery V is pushed from the front, it moves left and right along the vertical plate 37b so that the lateral center of the battery V and the lateral center of the aircraft body 1 approximately coincide.

[0065] When the first rotating body 32 is pushed to the rear of the second guide section 50, the front of the first guide section 37 is positioned above the second rotating body 51. At this time, the auxiliary wheel support mechanism 33 is in contact with the storage pin 52 (see Figure 8).

[0066] When the battery V is pushed further backward while the first rotating body 32 is positioned behind the second guide section 50, the storage pin 52 comes into contact with the auxiliary wheel support mechanism 33 and swings forward. The auxiliary wheel support mechanism 33 changes the auxiliary wheels 35 to the stored position when the battery V is mounted on the aircraft body 1. At this time, the first rotating body 32 comes into contact with the rear end of the second guide section 50. Also, the second rotating body 51 comes into contact with the front end of the first guide section 37. The driving position refers to the position in which the relative position of the auxiliary wheels 35 with respect to the battery V is fixed by the auxiliary wheel support mechanism 33 coming into contact with the regulating member 36. The stored position refers to the position in which the relative position of the auxiliary wheels 35 with respect to the battery V is fixed by the auxiliary wheel support mechanism 33 coming into contact with the storage pin 52. Specifically, the state shown in Figures 6 and 8 is the driving position, and the state shown in Figures 9 and 10 is the stored position.

[0067] Although not described in detail, the locking portion 41 has a mechanism that fixes it in an open state (held in a position inside the aircraft body). In this embodiment, the locking mechanism 34 can be maintained in an open state by swinging it around the axis in the direction in which the locking portion 41 extends. That is, when attaching or detaching the battery V, the locking mechanism 34 can be held in an open state to prevent the locking portion 41 from colliding with the aircraft body 1.

[0068] When installing the battery V, the locking mechanism 34 is held in the open position as described above, and the battery V is installed on the aircraft body 1. When the first rotating body 32 comes into contact with the fixing part 50b and the second rotating body 51 comes into contact with the contact part 38, the locking part 41 is swung, causing the locking part 41 to be inserted into the locking hole and the lock hole. As a result, the battery V is fixed to the aircraft body 1 by the locking mechanism 34.

[0069] To remove the battery V, the locking mechanism 34 is released by pulling it inward towards the aircraft body, and the battery V can be removed from the aircraft body 1 by pulling it towards the front of the aircraft body 1. At this time, the auxiliary wheel support mechanism 33 assumes a driving posture from the point when it is no longer in contact with the storage pin 52.

[0070] [Another embodiment] (1) The operating lever 10 is not required. For example, the machine 1 may be automatically controlled by a control device or the like, or it may be a wired remote control or the like.

[0071] (2) The auxiliary wheel support mechanism 33 does not need to change its posture. In other words, the posture of the auxiliary wheel support mechanism 33 may be fixed.

[0072] (3) Instead of the first rotating body 32 and the second rotating body 51, a non-rotating member may be provided. For example, a member with a smooth surface may be provided that is less likely to generate friction between the first guide portion 37 and the second guide portion 50.

[0073] (4) The locking mechanism 34 is not required. For example, the battery V may be maintained in place by its own weight. Furthermore, the form of the locking mechanism 34 is not limited to this embodiment. For example, it may be fixed by bolts or the like.

[0074] (5) The battery V does not have to be removed by pulling it forward relative to the aircraft 1. For example, the battery V may be removed by pulling it backward or to the side relative to the aircraft 1.

[0075] (6) Hydraulic equipment C is not required. The running wheels 2 and the support mechanism A may be driven by electric motors or the like, each provided with one of them.

[0076] (7) The handle portion 30 does not need to be provided. For example, when transporting the battery V, a separate transport aid such as a trolley may be provided, or a transport assist handle may be provided that is attached only when transporting the main body portion 31.

[0077] (8) In the above-described embodiment, an example was given in which the detachable part is a battery V. The work vehicle may be equipped with other detachable parts. For example, the detachable parts may include an engine unit as a power source for the work vehicle, a fuel tank, a hydrogen cylinder, a fuel cell, etc. For example, the detachable parts may include a storage unit for storing agricultural materials (water for spraying, chemicals, fertilizers, etc.), harvested crops, cut grass, etc. [Industrial applicability]

[0078] This invention can be applied to work vehicles suitable for traveling on uneven terrain. These work vehicles can be used in mountainous areas, forests, fields and their surroundings, riverbanks, construction sites, and the like. [Explanation of Symbols]

[0079] 1: Aircraft 2: Running wheels (running gear) 10: Operating lever (manual operating device) 30: Handle 31: Main body 32: First solid of revolution (solid of revolution) 33: Auxiliary wheel support mechanism 34: Locking mechanism 35: Auxiliary wheel 50:Second Information Department (Guidance Department) 50a: Inclined part A: Support mechanism C: Hydraulic equipment V: Battery (removable part)

Claims

1. The aircraft and, The traveling devices located on both the left and right sides of the aforementioned aircraft, It is located between the left and right running gears and includes a detachable part that is detachable from the machine body, The detachable object is a work vehicle that has auxiliary wheels that make contact with the ground when the detachable object is detached from the machine body and assist in the movement of the detachable object.

2. The aforementioned traveling device is equipped with a human-operated device that allows it to be operated manually, The aforementioned manual operating device is provided at one end of the machine in the front-rear direction, The work vehicle according to claim 1, wherein the attachment and detachment object is attached to and detached from the machine from the opposite side of the front-rear end of the machine where the manual operating tool is provided.

3. The work vehicle according to claim 1, wherein the attachment / detachment can be removed from the machine by pulling it towards the front of the machine.

4. The work vehicle according to claim 3, wherein the detachable object has a locking mechanism on the front side of the machine body for fixing the detachable object to the machine body.

5. The detachable part supports the auxiliary wheel and has an auxiliary wheel support mechanism that can change the posture between a stowed position in which the auxiliary wheel is separated from the ground and a running position in which the auxiliary wheel is in contact with the ground. The auxiliary wheel support mechanism changes the auxiliary wheel to the retracted position when the detachable object is attached to the machine body, according to any one of claims 1 to 4.

6. The aforementioned detachable object has a rotating body that can be driven to rotate, The aforementioned machine has a guide section for guiding the rotating body, The work vehicle according to claim 3 or 4, wherein the guide portion has an inclined portion that is located higher towards the rear of the machine.

7. The aforementioned machine is equipped with hydraulic equipment supported by the machine body, The detachable part is located below the hydraulic equipment, as described in any one of claims 1 to 4.

8. The detachable part comprises a main body located below the hydraulic equipment when the detachable part is attached to the machine, a handle provided at one end of the main body, and auxiliary wheels provided at the other end of the main body. The work vehicle according to claim 7, wherein the upper end of the handle portion is located above the upper end of the main body portion.

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