Riding lawn mower

Abstract

To easily perform an operation where a lawn mowing device is fixed to a flip-up attitude.SOLUTION: A sulky lawn mower comprises a traveling vehicle body, a lawn mowing device, a lift arm and a fixing part. The traveling vehicle body includes a driving seat. The lawn mowing device is disposed in a front side of the traveling vehicle body and attitude of the lawn mowing device can be changed into a flip-up attitude where the front side is flipped up. One end part of the lift arm is rotatably connected to the traveling vehicle body, the other end part thereof is connected to the lawn mowing device, and the lift arm lifts the lawn mowing device through a lifting device. The fixing part includes a hook which is provided in the connection part between the lift arm and the lawn mowing device, and when the attitude of the lawn mowing device is changed to the flip-up attitude, the hook is engaged to fix the lawn mowing device in the flip-up attitude.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a riding lawnmower. [Background technology]

[0002] Conventionally, in a riding lawnmower equipped with a lawnmower for cutting grass and the like, which is disposed in front of a vehicle body having a driver's seat, it is known that the lawnmower is configured to be rotatable about a rotation axis different from the rotation axis that changes the position of the lawnmower when it is raised or lowered by a hydraulic cylinder, and that the lawnmower is rotated about the rotation axis to change the position of the lawnmower into a raised position with the front side raised before maintenance work can be performed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 2982257 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with conventional riding lawnmowers, in order to secure the lawnmower in the raised position, it is necessary, for example, to have someone to hold the lawnmower in the raised position and another person to secure the lawnmower that is being held, making it difficult for one person to secure the lawnmower in the raised position.

[0005] The present invention has been made in consideration of the above, and has an object to provide a riding lawnmower that allows the lawnmower to be easily fixed in a raised position. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, the riding lawnmower (1) according to the embodiment is characterized in that it comprises a traveling body (2) having a driver's seat (231), a lawnmower (3) that is arranged in front of the traveling body (2) and can be changed into a raised position with the front side raised, a lift arm (4) having one end rotatably connected to the traveling body (2) and the other end connected to the lawnmower (3) and raising and lowering the lawnmower (3) by a lifting device (5), and a fixing part (9) that has a hook (92) provided at the connection part of the lift arm (4) with the lawnmower (3), and that, when the lawnmower (3) changes into the raised position, the hook (92) engages with the lawnmower (3) to fix the lawnmower (3) in the raised position. Effect of the Invention

[0007] According to the riding lawnmower of this embodiment, the operation of fixing the lawnmower in the lifted position can be easily performed. [Brief description of the drawings]

[0008] [Figure 1A] FIG. 1A is a side view (part 1) showing a riding lawnmower according to an embodiment. [Figure 1B] FIG. 1B is a side view (part 2) showing the riding lawnmower according to the embodiment. [Diagram 2] FIG. 2 is a perspective view showing the lawnmower. [Diagram 3] FIG. 3 is a perspective view showing the fixing portion. [Figure 4A] FIG. 4A is a perspective view showing the lawnmower before it is fixed by the fixing part. [Figure 4B] FIG. 4B is a perspective view showing the lawnmower after it has been fixed by the fixing part. [Diagram 5] FIG. 5 is an explanatory diagram of the operation when the lawnmower is fixed by the fixing part. [Figure 6] FIG. 6 is a perspective view showing the lawnmower after it has been released from the fixing portion. [Figure 7] FIG. 7 is an explanatory diagram of the operation when the fixing of the lawnmower by the fixing part is released. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of a riding lawnmower disclosed in the present application will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiment described below.

[0010] <Overview of Riding Lawn Mower 1> First, an overview of a riding lawnmower 1 according to an embodiment will be described with reference to Figures 1A and 1B. Figures 1A and 1B are side views showing a riding lawnmower 1 according to an embodiment. Note that Figure 1A shows a state in which a lawnmower device 3, which will be described later, is lowered (in a normal position), and Figure 1B shows a state in which the lawnmower device 3 is raised (in a flip-up position).

[0011] 1A and 1B show a three-dimensional Cartesian coordinate system including a Z-axis with the positive direction being vertically upward (upward). In the following, for the sake of convenience, the positive direction of the X-axis is defined as the left, the negative direction of the X-axis as the right, the positive direction of the Y-axis as the front, and the negative direction of the Y-axis as the rear, and the X-axis direction is referred to as the left-right direction, the Y-axis direction as the front-back direction, and the Z-axis direction as the up-down direction.

[0012] The riding lawnmower 1 is operated by an operator (also referred to as an worker) seated in a driver's seat 231, which will be described later. As shown in Figures 1A and 1B, the riding lawnmower 1 comprises a traveling body 2, a lawnmower device 3, a lift arm 4, a lifting device 5, and a grass collection container (hereinafter referred to as a collector) 6. The traveling body 2 comprises, as traveling wheels, a pair of left and right front wheels 21 and a pair of left and right rear wheels 22. The traveling body 2 also comprises a steering unit 23.

[0013] The control section 23 is disposed at the front of the traveling vehicle body 2. The control section 23 includes a driver's seat 231, a floor step 232, a steering column 233, and a steering wheel 234. As described above, the driver's seat 231 is a seat where the driver sits. The floor step 232 is provided in front of the driver's seat 231. The steering column 233 is provided in an upright position in front of the floor step 232.

[0014] The steering wheel 234 is provided on the upper part of the steering column 233. In addition to the steering wheel 234, an operation panel, various operation levers, various operation switches, etc. are provided on the upper part of the steering column 233. Also, behind the control unit 23, an arch-shaped safety bar 24 is provided so as to be tiltable in the front-rear direction when viewed from the front of the aircraft.

[0015] The traveling vehicle body 2 also includes an engine room 25 below a collector 6, which will be described later. The engine room 25 houses an engine and an exhaust gas purification device. The engine is, for example, a diesel engine. The engine may also be a diesel engine equipped with a turbocharger.

[0016] An exhaust gas purification device is a device that purifies the exhaust gas discharged from an engine, and for example, collects particles by passing the exhaust gas through a filter section called a DPF (Diesel Particulate Filter). Note that the exhaust gas purification device has a regeneration function that burns off the accumulated particles, for example, to prevent the collected particles from accumulating and clogging the DPF.

[0017] The traveling vehicle body 2 is also provided with, for example, an air cleaner device for supplying clean air to the engine. The air cleaner device is a device for supplying clean air to the engine.

[0018] The lawnmower 3 is disposed in front of the traveling body 2. The lawnmower 3 includes a deck 31, a cutting blade (not shown), a motor 321 (see FIG. 2), etc. The lawnmower 3 is attached to the traveling body 2 via a lifting device 5, which will be described later, so as to be able to freely rise and fall. Details of the lawnmower 3 will be described further below with reference to FIG. 2.

[0019] One end of the lift arm 4 is rotatably connected to the traveling vehicle body 2, and the other end is connected to the lawnmower 3. The lift arm 4 is driven by the lifting device 5 to raise and lower the lawnmower 3. Details of the lift arm 4 will be described later with reference to FIG.

[0020] The lifting device 5 is provided on the traveling vehicle body 2, and transmits power to the lift arm 4 to drive the lift arm 4 to lift and lower the lift arm 4. The lifting device 5 drives the lift arm 4 to lift and lower the lawnmower 3.

[0021] The collector 6 is mounted on the traveling body 2 and stores grass cut by the lawnmower 3. The collector 6 is mounted so as to be able to rise and fall via, for example, a collector lifting arm 61. The collector lifting arm 61, together with a collector lifting cylinder and the like, constitutes a collector lifting mechanism.

[0022] The riding lawnmower 1 also includes a blower case 7 that houses a blower unit. A chute 71 is provided between the blower case 7 and the lawnmower 3. The blower case 7 and the collector 6 are connected by a duct 72.

[0023] In this way, in the riding lawnmower 1, grass and the like cut by the lawnmower device 3 is sent from the lawnmower device 3 via the chute 71 to the blower case 7 (blower device), and is further air-transported to the collector 6 via the duct 72.

[0024] Furthermore, a grass discharge outlet is formed at the end of the duct 72. The grass discharge outlet serves as a connection to the collector 6. That is, when the collector 6 is in a lowered position, the grass inlet and the grass discharge outlet of the collector 6 overlap, connecting the duct 72 to the collector 6. Grass and other materials cut by the lawnmower 3 are transported into the collector 6 by the blower device via the chute 71 and the duct 72.

[0025] Although not shown, in the riding lawnmower 1, the power (rotational power) output from the engine is transmitted to a distribution transmission shaft connected to the output shaft of the engine, and then transmitted to a PTO (Power Take-off) shaft (blower PTO shaft) of the blower device described above. The rotational power output from the blower PTO shaft is transmitted to the blower device, for example, via a blower transmission device (such as a gear transmission device).

[0026] The rotational power output from the distribution transmission shaft is transmitted to the drive wheels via the traveling transmission device. That is, the trunnion shaft tilts to change the speed of the hydraulic motor via a hydraulic pump of a hydraulic type continuously variable transmission (also called HST (Hydro Static Transmission)) housed in the transmission case 8.

[0027] The riding lawnmower 1 is configured to be switchable between two-wheel drive (2WD) and four-wheel drive (4WD). Therefore, when the riding lawnmower 1 is a 2WD, the drive wheels are either the left or right front wheels 21 or the left or right rear wheels 22 (for example, the left or right front wheels 21), and when the riding lawnmower 1 is a 4WD, the drive wheels are the left or right front wheels 21 and the left or right rear wheels 22.

[0028] In the case of 4WD, the rotational power output from the distribution transmission shaft is transmitted to the front wheels 21 via the hydraulic pump and hydraulic motor of the HST, the gear transmission device in the differential case, and the differential mechanism. The rotational power output from the distribution transmission shaft is transmitted to the rear wheels 22 via the hydraulic pump and hydraulic motor of the HST, and further via the gear transmission device in the differential case and the differential mechanism.

[0029] The rotational power output from the distribution transmission shaft is transmitted to the PTO shaft (mower PTO shaft) of the lawnmower 3. The rotational power output from the mower PTO shaft is transmitted to the cutting blade via the mower input shaft and a mower transmission device (such as a gear transmission device) in the deck section 31 (see FIG. 2).

[0030] The riding lawnmower 1 also includes a fixing unit 9 (see FIG. 2). When an operator lifts the front side of the lawnmower 3 during maintenance work or the like, causing the lawnmower 3 to assume a flip-up position in which the front side is raised, the fixing unit 9 fixes the lawnmower 3 in the flip-up position. Details of the fixing unit 9 will be described later using FIG. 2 and subsequent figures.

[0031] <Lawn mower 3> Next, the lawnmower 3 and the surrounding area of ​​the lawnmower 3 will be described with reference to Fig. 2. Fig. 2 is a perspective view showing the lawnmower 3. As shown in Fig. 2, the lawnmower 3 includes a deck unit 31, a lawnmower mechanism 32, a front wheel unit 33, and a horizontal mechanism 34.

[0032] The height of deck section 31 from the ground (i.e., mowing height) can be adjusted by changing the contact angle of front wheels 33 from the ground. Deck section 31 has a cutting blade of lawnmower mechanism 32 arranged on the back surface (lower surface) of the top plate, and a power section (motor 321, etc.) of lawnmower mechanism 32, lift arm 4, fixed section 9, etc. arranged on the front surface (upper surface) of the top plate in a state exposed to the outside.

[0033] The lawnmower mechanism 32 includes a cutting blade and a motor 321. In the lawnmower mechanism 32, the cutting blade rotates around a rotation axis along a direction perpendicular to the upper surface of the top plate of the deck section 31 by power from the motor 321, and the rotating cutting blade cuts grass growing on the ground.

[0034] The front wheel unit 33 includes wheels 331 and a rotating mechanism 332. The wheels 331 are provided in front of the deck unit 31, and support the lift arm 4 by contacting the ground when mowing. The rotating mechanism 332 has a rotating shaft along the up-down direction, and is provided so as to be rotatable about the rotating shaft. The rotating mechanism 332 is connected to the wheels 331, and rotates in response to the traveling of the traveling body 2 (see FIGS. 1A and 1B) in the traveling direction, thereby orienting the wheels 331 in the traveling direction.

[0035] The horizontal mechanism 34 is formed, for example, by a screw-type rod, and adjusts the angle of the deck unit 31 with respect to the ground when mowing. The horizontal mechanism 34 adjusts, for example, the distance between the lawnmower 3 and the lift arm 4 by how tightly the screw is fastened. For example, the tighter the screw is, the narrower the distance between the lawnmower 3 and the lift arm 4 becomes, the higher the rear of the deck unit 31 becomes from the ground, and the higher the height of the deck unit 31 becomes.

[0036] Also, for example, the more the screw is loosened, the wider the gap between the lawnmower 3 and the lift arm 4 becomes, the closer the rear of the deck unit 31 is to the ground, and the lower the height of the deck unit 31 becomes. In this way, by using a screw for the horizontal mechanism 34, the operator can adjust the deck unit 31 to any height, so that, for example, in addition to making the deck unit 31 parallel to the ground, when mowing an area with a high load (for example, an area with tall grass), the rear of the deck unit 31 can be made higher than the front to prevent the load of mowing twice.

[0037] 2, a pair of left and right lift arms 4 are arranged on the surface (upper surface) of the top plate of the deck section 31. Each lift arm 4 includes a first arm section 41 and a second arm section 42. The first arm section 41 has a base end section (rear end section) connected to the traveling vehicle body 2 and a tip end section (front end section) connected to the second arm section 42.

[0038] The second arm portion 42 is disposed on the upper surface of the top plate of the deck portion 31 so as to extend forward from the first arm portion 41. The second arm portion 42 has a base end (rear end) connected to the first arm 351 and a tip end (front end) connected to the front wheel portion 33. The second arm portion 42 is provided so as to be swingable relative to the deck portion 31 around a swing shaft 951 (described later). In other words, the lawnmower 3 is swingable relative to the lift arm 4.

[0039] In this way, since the lawnmower 3 can swing relative to the lift arm 4, for example, when the lift arm 4 is used to change the lawnmower 3 to a position in which the front is raised, i.e., a flipped-up position, the lawnmower 3 (deck portion 31) can swing relative to the lift arm 4.

[0040] 2, a fixing part 9 is disposed on the upper surface side of the top plate of the deck part 31. The fixing part 9 is disposed on either the left or right side of the deck part 31 (for example, the left side).

[0041] The fixing parts 9 are engaged with each other to fix the lawnmower 3 in the lifted position. One of the fixing parts 9 (such as a hook 92 described below) is provided on the lift arm 4 side. The other of the fixing parts 9 (such as a pin 96 described below) is provided on the top plate side of the deck 31.

[0042] <Fixed part 9> Next, the configuration of the fixing portion 9 will be described with reference to Fig. 3. Fig. 3 is a perspective view showing the fixing portion 9. As described above, the fixing portion 9 is provided so that one side and the other side can be engaged with each other. As shown in Fig. 3, one side of the fixing portion 9 includes a base 91, a hook 92, a rotating shaft 93, and a spring 94.

[0043] The base (hereinafter referred to as the hook side base) 91 is provided on the inner surface at the tip of the first arm portion 41 of the lift arm 4. The hook side base 91 has a hole (not shown) through which a rotating shaft 93, which will be described later, is inserted. The hook side base 91 also has an arch-shaped guard member 911 provided so as to cover the hole. The guard member 911 protrudes inward from the inner surface of the hook side base 91, and has a surface that is located more inward than the inner surface of the hook side base 91.

[0044] The hook 92 is supported by the hook side base 91 and is disposed on the inner surface of the tip of the lift arm 4. The hook 92 includes an engagement portion 921, an operation portion 922, and a hole portion (not shown). The engagement portion 921 is the hook portion of the hook 92 and is formed in a hook shape. The operation portion 922 is a portion on which an operator places his or her fingers when operating the hook 92, and is formed so as to protrude from the main body of the hook 92. The hole portion is a hole through which the rotation shaft 93 is inserted.

[0045] The pivot shaft 93 is inserted through the hole of the hook side base 91 and the hole of the hook 92 in a state where the holes are aligned with each other. The pivot shaft 93 serves as a pivot point for the hook 92. This allows the hook 92 to be rotatable around the axis of the pivot shaft 93 with the pivot shaft 93 as the center.

[0046] The spring 94 biases the hook 92, which rotates around the axis of the rotation shaft 93, in one of the rotation directions (forward direction) or the other (reverse direction) of the hook 92. The spring 94 is, for example, a tension coil spring, and has one end connected to the hook 92 via a protrusion 923 and the other end fixed to a fixing groove 912 formed in the guard member 911, thereby being connected to the hook side base 91. A plurality of fixing grooves 912 are provided in the guard member 911. That is, the other end of the spring 94 can be fixed at a plurality of fixing positions.

[0047] In the example shown in Figure 3 etc., when the other end of spring 94, which is a tension coil spring, is fixed to fixing groove 912 below pivot shaft 93 across the pivot shaft 93, hook 92 is biased in a direction toward pin 96 described later, i.e., in the direction in which hook 92 closes (this direction is defined as the positive direction), and when fixed to fixing groove 912 above the pivot shaft 93, hook 92 is biased in a direction away from pin 96, i.e., in the direction in which hook 92 opens (this direction is defined as the reverse direction).

[0048] In this way, when the fixed position of the other end of the spring 94 is changed, the direction in which the spring 94 urges the hook 92 is switched, and the direction in which the spring 94 urges the hook 92 can be switched to either the forward or reverse direction of the rotation direction of the hook 92.

[0049] In addition, if the spring 94 is a tension coil spring, when the other end of the spring 94 is fixed below the pivot shaft 93, the hook 92 is biased in the positive direction, and when it is fixed above the pivot shaft 93, the hook 92 is biased in the reverse direction. However, for example, if the spring 94 is a compression coil spring, when the other end of the spring 94 is fixed above the pivot shaft 93, the hook 92 is biased in the positive direction, and when it is fixed below the pivot shaft 93, the hook 92 is biased in the reverse direction.

[0050] 3, the other of the fixed part 9 includes a base 95 and a pin 96. The base (hereinafter referred to as the pin-side base) 95 is provided on the upper surface of the top plate of the deck part 31 of the lawnmower 3 and is fixed to the upper surface of the top plate. The pin-side base 95 includes a swing shaft 951 and an insertion hole 952.

[0051] The swing shaft 951, via the pin-side base 95, serves as a swing fulcrum for the deck unit 31 to which the pin-side base 95 is fixed. In this way, the deck unit 31 can swing about the axis of the swing shaft 951 with the swing shaft 951 as the center, and therefore the lawnmower 3 can swing about the axis of the swing shaft 951 in the flip-up posture.

[0052] The insertion hole 952 is a hole through which a pin 96, which will be described later, is inserted, and holds the pin 96 inserted in a direction parallel to the rotation shaft 93 of the hook 92 (in the left-right direction).

[0053] With the pin 96 inserted through the insertion hole 952, when the hook 92 rotates in the forward direction, the engaging portion 921 of the hook 92 engages with the pin 96. In this manner, the hook 92 engages with the pin 96, thereby fixing the lawnmower 3 in the flip-up position. The pin 96 is attached when the lawnmower 3 is fixed in the flip-up position, and is removed in other cases.

[0054] <Fixing Operation by Fixing Part 9> Next, the fixing operation by the fixing part 9 will be described with reference to Figures 4A, 4B and 5. Figure 4A is a perspective view showing the state before the lawnmower 3 is fixed by the fixing part 9. Figure 4B is a perspective view showing the state after the lawnmower 3 has been fixed by the fixing part 9. Figure 5 is an explanatory diagram of the operation when the lawnmower 3 is fixed by the fixing part 9.

[0055] As shown in Fig. 4A, before the lawnmower 3 is fixed, the fixing part 9 is biased by the spring 94 in a direction (positive direction) in which the hook 92 moves toward the pin 96. As shown in Fig. 4B, after the lawnmower 3 is fixed, the hook 92 and the pin 96 are engaged. In this case, the spring 94 biases the hook 92 in the direction toward the pin 96. This makes it possible to prevent the hook 92 from being unintentionally disengaged.

[0056] 4A and 4B, the other end of the spring 94 is fixed in a fixing groove 912 (this will be referred to as a first fixing groove 912a). This allows the hook 92 to be biased in a direction toward the pin 96 (positive direction).

[0057] 5, when the lawnmower 3 is fixed in the raised position, the operator lifts the front side of the deck unit 31, causing the deck unit 31 to swing about the axis of the swing shaft 951, and the pin 96 rises while sliding on the tip end (engagement portion 921) of the hook 92. When lifting the deck unit 31, the operator may hold the deck unit 31 in the lifted state with one hand while pulling up the operating portion 922 of the hook 92 with the fingers of the other hand, thereby creating a state in which the hook 92 can easily receive the pin 96.

[0058] Then, when the pin 96 passes the tip end (engagement portion 921) of the hook 92, the hook 92 and the pin 96 engage with each other, and the lawnmower 3 is fixed in the flipped-up position.

[0059] <Fixing release operation by fixing portion 9> Next, the release operation of the fixing part 9 will be described with reference to Fig. 6 and Fig. 7. Fig. 6 is a perspective view showing the state after the fixing of the lawnmower 3 by the fixing part 9 has been released. Fig. 7 is an explanatory diagram of the operation when the fixing of the lawnmower 3 by the fixing part 9 is released.

[0060] 6, after the lawnmower 3 has been released from its fastening, the fixing part 9 is biased by the spring 94 in a direction (positive direction) in which the hook 92 moves away from the pin 96. Before the lawnmower 3 is released from its fastening, the other end of the spring 94 is switched from the first fastening groove 912a to be fixed to the other fastening groove 912 (hereinafter referred to as the second fastening groove 912b). This allows the hook 92 to be biased in a direction in which it moves away from the pin 96.

[0061] 7, when releasing the lawnmower 3 from its lifted-up position, the operator lifts the front side of the deck unit 31, causing the deck unit 31 to swing about the axis of the swing shaft 951, and the hook 92, which has been released from engagement with the pin 96, moves upward due to the bias of the spring 94. In this case, by lifting the deck unit 31, the engagement between the hook 92 and the pin 96 is automatically released.

[0062] When the hook 92 and the pin 96 are disengaged, the lawnmower 3 is released from the lifted position.

[0063] As described above, with the riding lawnmower 1 according to the embodiment, when the lawnmower device 3 changes to the raised position, the lawnmower device 3 is fixed in the raised position, so that the operation of fixing the lawnmower device 3 in the raised position can be easily performed, thereby reducing the labor required for work that requires the lawnmower device 3 to be in the raised position, such as maintenance work.

[0064] Furthermore, when the lawnmower 3 changes to the flip-up position, the hook 92 and the pin 96 engage with each other, thereby fixing the lawnmower 3 in the flip-up position.

[0065] Furthermore, by biasing the hook 92 in a direction toward the pin 96, when the lawnmower 3 is to be changed to the raised position, the hook 92 automatically catches on the pin 96 by rocking the lawnmower 3. Furthermore, by biasing the hook 92 in a direction away from the pin 96, when the lawnmower 3 is to be changed to its original position, the hook 92 automatically disengages from the pin 96 by rocking the lawnmower 3. This makes it easy to change the position of the lawnmower 3.

[0066] In addition, since the direction in which the spring 94 biases the hook 92 can be switched, the posture of the lawnmower 3 can be easily changed both when changing the lawnmower 3 to a raised posture and when changing the lawnmower 3 to its original posture.

[0067] Furthermore, when the fixed position of the other end of the spring 94 is changed, the direction in which the spring 94 urges the hook 92 can be switched, so that the direction in which the spring 94 urges the hook 92 can be easily switched.

[0068] According to the embodiment described above, the riding lawnmower 1 described below is realized.

[0069] (1) A riding lawnmower 1 comprising: a traveling body 2 having a driver's seat 231; a lawnmower 3 arranged in front of the traveling body 2 and capable of being changed into a raised position with the front side raised; a lift arm 4 having one end rotatably connected to the traveling body 2 and the other end connected to the lawnmower 3 and raising and lowering the lawnmower 3 by a lifting device 5; and a fixing part 9 having a hook 92 provided at the connection part of the lift arm 4 with the lawnmower 3, which engages with the hook 92 to fix the lawnmower 3 in the raised position when the lawnmower 3 changes into the raised position.

[0070] With this type of riding lawnmower 1, when the lawnmower device 3 changes to the raised position, the lawnmower device 3 is fixed in the raised position, so that the operation of fixing the lawnmower device 3 in the raised position can be easily performed, thereby reducing the labor required for work that requires the lawnmower device 3 in the raised position, such as maintenance work.

[0071] (2) In the riding lawnmower 1 described above in (1), the fixing portion 9 has a pin 96 with which the hook 92 can engage, and when the lawnmower 3 changes to the raised position, the hook 92 and the pin 96 engage with each other to fix the lawnmower 3 in the raised position.

[0072] According to such a riding lawnmower 1, in addition to the effect of (1) above, the hook 92 and the pin 96 engage with each other, so that the lawnmower 3 can be fixed in the raised position.

[0073] (3) In the riding lawnmower 1 described above in (2), the fixed portion 9 has one end connected to the hook 92 and further has a spring 94 that biases the hook 92, the hook 92 is rotatably arranged around a pivot shaft 93, and the direction in which the spring 94 biases the hook 92 can be switched to either one or the other of the rotation directions of the hook 92.

[0074] With this riding lawnmower 1, in addition to the effect of (2) above, for example, by biasing the hook 92 in a direction toward the pin 96, the hook 92 will automatically catch on the pin 96 when the lawnmower 3 is rocked to change the lawnmower 3 to a raised position, and for example, by biasing the hook 92 in a direction away from the pin 96, the hook 92 will automatically disengage from the pin 96 when the lawnmower 3 is rocked to change the lawnmower 3 to its original position. This makes it easy to change the position of the lawnmower 3.

[0075] In addition, since the direction in which the spring 94 biases the hook 92 can be switched, the posture of the lawnmower 3 can be easily changed both when changing the lawnmower 3 to a raised posture and when changing the lawnmower 3 to its original posture.

[0076] (4) In the riding lawnmower 1 described above in (3), the other end of the spring 94 can be fixed at a plurality of fixing positions, and when the fixing position is changed, the direction in which the spring 94 urges the hook 92 can be switched.

[0077] In addition to the effect of (3) above, such a riding lawnmower 1 makes it possible to easily switch the direction in which the spring 94 urges the hook 92.

[0078] Further advantages and modifications may readily occur to those skilled in the art. Thus, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and equivalents thereof. [Explanation of symbols]

[0079] 1. Riding lawn mower 2 Running vehicle 3 Lawn mower 4 Lift Arm 5 Lifting device 6 Grass collector 7 Blower case 8. Transmission Case 9 Fixed part 21 Front wheel 22 Rear wheel 23 Control Unit 24 Safety Bar 25 Engine Room 31 Deck Section 32 Lawn mowing mechanism 33 Front wheel 34 Horizontal mechanism 41 First arm section 42 Second arm section 61 Collector lifting arm 71 Shooter 72 Duct 91 Base (hook side base) 92 Hook 93 Rotating shaft 94 Spring 95 Base (Pin side base) 96 pin 231 Driver's seat 232 Floor Step 233 Steering column 234 Steering Wheel 321 Motor 331 wheels 332 Rotating mechanism 911 Guard material 912 Fixed groove 912a First fixing groove 912b Second fixing groove 921 Engagement part 922 Operation section 923 Protrusion 951 Swing shaft

Claims

1. A traveling vehicle body having a driver's seat; a lawnmower disposed in front of the traveling vehicle body and capable of changing into a flip-up position with the front side raised; a lift arm having one end rotatably connected to the traveling vehicle body and the other end connected to the lawnmower, the lift arm raising and lowering the lawnmower by a lifting device; a hook provided at a connection portion of the lift arm with the lawnmower, the hook having a tip portion rotatable by a rotation shaft inserted into a hole in a hook side base fixed to the tip portion of the lift arm, and a pin inserted into an insertion hole in a pin side base fixed to an upper surface of a top plate of the lawnmower, the hook engaging with the pin to fix the lawnmower in the lifted position when the lawnmower changes to the lifted position; To be prepared A riding lawn mower characterized by:

2. The fixing portion is a spring having one end connected to the hook and biasing the hook; The hook is The actuator is provided so as to be rotatable about a rotation axis. The spring is The direction in which the hook is biased can be switched to either one of the rotation directions of the hook.

2. The riding lawn mower according to claim 1 .

3. The spring is The other end can be fixed at a plurality of fixing positions, and when the fixing position is changed, the direction in which the hook is biased can be changed.

3. The riding lawn mower according to claim 2.

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