JP2010035490A - Riding-type working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding-type working vehicle enabling the driving and moving operation of an opening and closing shutter to be carried out at a driving and steering part without proceeding to an opening and closing shutter-installed position from the driving and steering part. <P>SOLUTION: The riding-type working vehicle is obtained by installing a mower 4 in a traveling machine body equipped with the driving and steering part 7, and the mower 4 is constituted of a reaping blade 8 and a mower deck 9 storing the reaping blade 8. The mower deck 9 has a releasing opening 9A for releasing mowed grass and the opening and closing shutter 15 for closing the releasing opening 9A. A switching operation lever 19 for opening and closing is installed in the driving and steering part 7, and the opening and closing shutter 15 and the switching operation lever 19 are cooperated by a release wire 20. The opening and closing shutter 15 is constituted so as to be switched to the opened state or the closed state by the switching operation of the switching operation lever 19 for opening and closing. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is provided with a mower on a traveling machine body having a driving control unit, the mower is composed of a mowing blade and a mower deck storing the mowing blade, and a discharge port for discharging mowing lawn to the mower deck; The present invention relates to a passenger work vehicle including an opening / closing shutter that closes a discharge port.

  In a passenger work vehicle, for example, as disclosed in Patent Document 1, a latch (publication number: 46) as a lock fitting is provided at the rear end of a slide cover (publication number: 37) as an opening / closing shutter. In addition, a hook (publication number: 44) as a lock receiver is provided at the front and rear end positions of a discharge port (publication number: 7b) as a discharge port, and the latch and the hook constitute a lock mechanism.

  As a result, in a state where the slide cover is artificially moved to close the discharge port, the latch is engaged with the hook to perform the locking action.

JP 2008-99610 A (paragraph numbers [0051] [0052], FIGS. 4, 5, 8, and 9)

  In the above-described configuration, each time the slide cover is moved, the discharge work mode must be taken down to the installation position of the slide cover from the driver's seat and the cut grass is discharged from the discharge port. There is a possibility that the work burden of switching to a mulching work mode that does not release mowing lawn from the discharge port may become large, and there is still room for improvement.

  An object of the present invention is to provide a riding-type work vehicle in which the opening / closing shutter can be driven and moved in the driving control unit without going from the driving control unit to the opening / closing shutter installation position.

(Constitution)
The characteristic configuration of the present invention according to claim 1 is characterized in that an opening / closing switching operation tool is provided in the driving control unit, the opening / closing shutter and the opening / closing switching operation tool are linked, and switching to the opening / closing switching operation tool is performed. The opening / closing shutter is configured to be switched between an open state and a closed state by an operation, and the effects thereof are as follows.

(Function)
A configuration in which an opening / closing switching operation tool is provided in the driving control unit and the opening / closing shutter and the opening / closing switching operation tool are linked is adopted. By operating the open / close switching operation tool, the open / close state of the discharge port can be switched by moving the open / close shutter.

(The invention's effect)
By simply providing an opening / closing switching operation tool linked to the opening / closing shutter in the driving control section, it is possible to operate the opening / closing shutter while staying in the driving control section without going to the installation position of the opening / closing shutter.
As a result, it is possible to provide a passenger work vehicle that reduces the work load of switching between the discharge work mode and the mulching work mode.

(Constitution)
The characteristic configuration of the present invention according to claim 2 is a machine that mechanically transmits the operation of the opening / closing switching operation tool to the opening / closing shutter as means for linking the opening / closing shutter and the opening / closing switching operation tool. The function and effect are as follows.

(Function and effect)
Since the opening / closing shutter and the switching operation tool for opening and closing are linked via mechanical linkage means for mechanically transmitting, the operation to the switching operation tool for opening / closing is reliably transmitted to the opening / closing shutter, and mud Even if there is sticking or floating lawn grass, they are not easily affected.

(Constitution)
According to a third aspect of the present invention, there is provided a means for linking the opening / closing shutter and the opening / closing switching operation tool, an opening / closing actuator for driving the opening / closing shutter, and switching of the opening / closing switching operation tool. The operation position detection means for detecting the operation position and the control means for driving and controlling the actuator for opening and closing based on the detection information from the operation position detection means are as follows. It is.

(Function and effect)
As a means for linking the opening / closing shutter and the opening / closing switching operation tool, when a mechanical linking means is employed, a path from the opening / closing switching operation tool to the opening / closing shutter is connected to the opening / closing switching operation tool. In order to transmit the operation amount, it is necessary to secure an installation space for providing a transmission member that performs a predetermined operation.
On the other hand, in the case of adopting the configuration as described above, the opening / closing actuator provided for the opening / closing shutter is electrically connected to the operation position detecting means provided for the opening / closing switching operation tool. It is only necessary to provide a control means that does not need to secure an installation space for providing a transmission member for performing a predetermined operation.
As a result, it is possible to simplify the mechanism that links the opening / closing shutter and the opening / closing switching operation tool, and it is possible to provide a riding-type work vehicle that can easily and easily configure the arrangement of components around the mower.

(Constitution)
According to a fourth aspect of the present invention, there is provided a lock mechanism for locking the open / close shutter in the closed state, and the open / close switching operation tool is configured to switch the lock mechanism between a locked state and an unlocked state. The operational effects are as follows.

(Function and effect)
In the case where the mower deck is provided with an opening / closing shutter, it is necessary to provide a lock mechanism for locking the opening / closing shutter in a closed state in order to suppress rattling of the opening / closing shutter.
In this case, since the lock mechanism can also be operated from the driving control unit with the switching operation tool for opening and closing, it is not necessary to go to the installation position of the lock mechanism, and the operation becomes easy.
In particular, since the operation to the locking mechanism can be performed by the opening / closing switching operation tool for the opening / closing shutter, the opening / closing switching operation tool can be used as the operation tool for the locking mechanism.

(Constitution)
According to a fifth aspect of the present invention, there is provided a lock mechanism for locking the open / close shutter in the closed state, and a lock switch operating tool for switching the lock mechanism between the locked state and the unlocked state. The operation and effect are as follows.

(Function and effect)
When the mower deck is provided with an opening / closing shutter, it is necessary to provide a lock mechanism that locks the opening / closing shutter in a closed state in order to suppress rattling of the opening / closing shutter.
In this case, since the lock mechanism can also be operated from the operation control unit with the lock switching operation tool, it is not necessary to go to the installation position of the lock mechanism, and the operation becomes easy.
The switching operation tool for opening and closing may be configured to exhibit a function that only switches the shutter for opening and closing, and the switching switching tool may be configured to exhibit a function that only operates the lock mechanism.
Therefore, the structure as each operation tool can be simplified. Further, the operation does not require complicated movement and may be simple.

[First Embodiment]
As shown in FIG. 1, a mower 4 is supported at the center lower part of the body frame 3 supported by the right and left front wheels 1 and the right and left rear wheels 2, and a driver seat 5 is provided at the upper rear part of the body frame 3. A driving control unit 7 is provided, and an engine 6 is supported at the front of the airframe to configure a riding mower that is an example of a riding work vehicle.

  The configuration of the mower 4 will be described. As shown in FIG. 2, the mower 4 includes left and right mowing blades 8 and a mower deck 9 that houses and supports the mowing blades 8. A drive pulley 10 that drives the cutting blade 8, an input pulley 11 that receives power transmission from the engine 6, and another tension pulley 12 are disposed and attached to the upper surface of the mower deck 9.

  A transmission belt 13 is installed over the input pulley 11 and the output pulley 6 </ b> A of the engine 6, and power from the engine 6 is introduced into the mower 4. An endless belt 14 is wound around an input pulley 11, each drive pulley 10, and a tension pulley 12 provided on the upper surface of the mower deck 9, and is configured to rotationally drive the left and right cutting blades 8.

  The drive structure of the cutting blade 8 will be described. As shown in FIG. 3, a rotating boss portion 41 is attached and fixed to an installation site of the driving pulley 10 of the moor deck 9, and a driving shaft 43 is rotatably supported in the rotating boss portion 41 via a bearing 42. A guide 44 for guiding the cut grass is provided outside the rotating boss portion 41. The drive pulley 10 is attached and fixed to the protruding end of the drive shaft 43 protruding upward from the rotating boss portion 41, and the cutting blade 8 is attached and fixed to the lower end protruding downward from the guide 44. The cutting blade 8 has a cutting blade 8a on one side and a wind-generating piece 8b on the tip.

  As shown in FIGS. 2 to 4, a discharge port 9 </ b> A is provided at the right end of the mower deck 9, and the cut grass is discharged from the mower deck 9 through the discharge port 9 </ b> A. An opening / closing shutter 15 is provided for the discharge port 9A, and a side discharge work mode in which the release port 9A is opened to discharge the cut grass and a mulching work mode in which the discharge port 9A is closed to cut the cut grass finely. It is configured to switch.

  Further, above the discharge port 9A, the discharge guide 16 is swingable up and down around the horizontal axis X and is urged downward by the torsion spring 16A, and the retreat posture in which the discharge guide 16 rises above the moor deck 9 and the right side of the mower deck 9 are located. It is configured to be switchable to a working posture projecting sideways.

  Next, a structure for switching the opening 9A of the opening / closing shutter 15 between the open state and the closed state will be described. As shown in FIG. 3, the opening / closing shutter 15 is formed by integrally forming a circular arc portion along the side surface of the moor deck 9 and a ceiling portion located above the circular arc portion in a dome shape.

  As shown in FIGS. 1 to 6, a drive mechanism 17 is installed over the opening / closing shutter 15 and the rotational axis Y of the right mowing blade 8. The drive mechanism 17 includes a drive arm 17A that is loosely fitted to the rotary boss portion 41 that supports the cutting blade 8 and is rotatable, a bracket 17B that is attached to the ceiling portion of the shutter 15 for opening and closing, a drive arm 17A, and a bracket 17B. And a leaf spring 17C for connecting the two. The opening / closing shutter 15 can be switched between the open state and the closed state by rotationally driving the drive arm 17A around the rotation axis Y. The leaf spring 17C absorbs vibration, vibration, and the like when the opening / closing shutter 15 is moved, thereby enabling the opening / closing shutter 15 to move smoothly.

  The open / close shutter 15 moves together with the drive arm 17 in the closed state covering the discharge port 9A as shown in FIGS. 2 and 4, and moves away from the discharge port 9A to the rear surface side of the mower deck 9 as shown in FIG. Thus, it is possible to switch to an open posture in which the discharge port 9A is opened.

  The opening / closing drive structure of the opening / closing shutter 15 will be described. As shown in FIGS. 1 and 6, an opening / closing switching operation lever 19 as an opening / closing switching operation tool 19 is provided on the rear wheel fender 18 on the lateral side of the driver's seat 5. The opening / closing switching operation lever 19 includes a grip portion 19B in the frame portion 19A, and is provided so as to be swingable up and down around a lateral axis.

  On the other hand, one end 20a of the inner wire 20A of the release wire 20 is connected to a connecting position between the driving arm 17A and the leaf spring 17C connected to the opening / closing shutter 15, and the other end 20b of the inner wire 20A of the release wire 20 is connected. Is connected to the switching operation lever 19 for opening and closing. The release wire 20 includes an inner wire 20A that connects the drive arm 17 and the opening / closing switching lever 19 and an outer wire 20B that holds the inner wire 20A.

A lock structure for the opening / closing shutter 15 will be described. As shown in FIGS. 2 and 4 to 6, a lock fitting 21 is provided at the front end of the opening / closing shutter 15 corresponding to the front side of the mower deck 9.
As shown in FIGS. 8 and 10, the lock fitting 21 is provided between the lock lever 21 </ b> A, which is cantilevered so as to be swingable horizontally over the upper and lower brackets 15 </ b> C provided on the opening / closing shutter 15, and an intermediate portion of the lock lever 21 </ b> A. The lock engaging piece 21B is supported around the vertical axis so as to be able to swing horizontally, and the biasing rubber plate 21C biases the lock engaging piece 21B in the unlocking direction.

  On the other hand, as shown in FIGS. 5, 7, and 8, a lock receiver 22 is provided at the front end of the edge of the discharge port 9A. The lock receiver 22 extends from the support bracket 24 of the front gauge wheel 23 that supports the mower deck 9, and is provided with a locking hole 22A for locking the tip locking portion of the lock locking piece 21B.

With the configuration described above, the opening / closing shutter 15 is switched to the closed state, and the lock locking piece 21B is engaged with the locking hole 22A, thereby restricting the movement of the opening / closing shutter 15 and closing the opening / closing shutter 15. Can be maintained in a state.
Here, the lock fitting 21 and the lock receiver 22 constitute a lock mechanism R that locks the shutter 15 for opening and closing.

  An operation structure for the lock mechanism R will be described. As shown in FIGS. 1 and 6, a lock switching operation lever 25 as a lock switching operation tool for switching the lock mechanism R is provided in the state of being close to the opening / closing switching operation lever 19. The lock switching operation lever 25, the lock lever 21A, and the lock engaging piece 21B are linked by a release wire 26, respectively.

  The detailed operation of the lock fitting 21 is performed as follows. As shown in FIGS. 7A and 8A, the lock engaging piece 21B is in an open position by the urging rubber 21C when the opening / closing shutter 15 is moved to the closing side. That is, the lock engaging piece 21B is provided with the urging rubber plate 21C on the inner surface, and urges the lock engaging piece 21B in the direction away from the opening / closing shutter 15. With such a configuration, when the opening / closing shutter 15 is switched and moved to the closed state, it is possible to prevent the lock engaging piece 21B from being caught unexpectedly on the edge of the discharge port 9A and difficult to perform the locking operation.

  When the opening / closing shutter 15 reaches the closed position, the lock operation lever 25 is operated to swing the lock engagement piece 21B toward the lock receiver 22 side, as shown in FIG. The piece 21 </ b> B is locked in the locking hole 22 </ b> A of the lock receiver 22. The lock lever 21A is also pulled by the release wire 26. However, since the stroke absorbing spring 27 is provided between the release wire 26 and the receiving piece of the lock lever 21A, the lock lever 21A is positioned at the lock lever 21A. It only swings together with the lock engaging piece 21B.

When the lock operation lever 25 is further operated from the state shown in FIG. 7B, the absorption stroke of the stroke absorption spring 27 reaches the limit, and the lock lever 21A is opened and closed as shown in FIG. 7C. The lock is applied by slightly swinging horizontally in a state approaching the shutter 15 (a state away from the lock engagement piece 21B). That is, when the lock lever 21A is operated in a direction approaching the opening / closing shutter 15, the straight line P connecting the engagement portion a between the lock engagement piece 21B and the engagement hole 22A and the swing fulcrum b of the lock lever 21A. The swing fulcrum c of the lock engaging piece 21B with respect to the lock lever 21A approaches the opening / closing shutter 15 side beyond the extension line.
As a result, the swing fulcrum c of the lock engaging piece 21B with respect to the lock lever 21A exceeds the dead point, and the locked state is maintained.

[Second Embodiment]
In the first embodiment, the configuration has been described in which the opening / closing shutter 15 and the lock mechanism R are linked by the mechanical linkage means and operated by the opening / closing switching operation lever 19 and the lock switching operation lever 25.
Here, as means for linking the opening / closing shutter 15 and the opening / closing switching operation lever 19, electrically linking means will be described.

As shown in FIG. 11, the electrically linked means includes an opening / closing actuator 30 that drives the opening / closing shutter 15, an operation position detection means 31 that detects a switching operation position of the opening / closing switching operation lever 19, and an operation position. The control means 32 is configured to drive and control the opening / closing actuator 30 based on detection information from the detection means 31.
The opening / closing actuator 30 includes a drive gear mechanism 30A provided at the pivot axis position of the drive arm 17 and a drive motor 30B that drives the drive gear mechanism 30A.

As the configuration for locking the opening / closing shutter 15 in the closed state, the locking pin 33 for engagement and the engagement hole 34 </ b> A for engaging the lock pin 33 for engagement are configured. Although not shown, the engagement lock pin 33 is slidably disposed in the vicinity of the edge of the discharge port 9A, and the bracket 34 forming the engagement hole 34A is attached to the opening / closing shutter 15 of the opening / closing shutter 15. Constitute.
The engagement lock pin 33 is configured to be slid and driven by a lock actuator 35, and is configured to drive and control the lock actuator 35 through the control means 32.

As shown in FIG. 11, the opening / closing switching lever 19 is for a shutter opening / closing switching path d that moves along the longitudinal direction of the machine body, and for a locking mechanism that moves in directions orthogonal to both ends of the opening / closing switching path d. It is configured to be operable along the switching route e.
The operation position detecting means 31 for detecting the switching operation position of the opening / closing switching lever 19 includes a shutter detection sensor 31A for detecting the movement state of the opening / closing shutter 15 in the shutter opening / closing switching path d, and a lock mechanism switching. The lock detection sensor 31B detects the movement state on the path e.

With the above configuration, when the opening / closing switching operation lever 19 is moved along the shutter opening / closing switching path d, the state is detected by the shutter detection sensor 31B, and the detection result is transmitted to the drive motor 30B through the control means 32. Thus, the opening / closing shutter 15 is driven to open and close. Similarly, when the opening / closing switching operation lever 19 is moved along the locking mechanism switching path e, the state is detected by the locking detection sensor 31A, and the locking mechanism R is operated.
With such a configuration, the switching operation can be performed while the opening / closing shutter 15 and the lock mechanism R are in the driving control unit 7.

The operation system of the PTO clutch 36 will be described. As shown in FIG. 11, the PTO clutch 36 is configured to be able to be turned on and off by an actuator 37, and a clutch operation lever 38 for turning on and off the PTO clutch 36 is provided.
A clutch operation position detection sensor 39 for detecting whether the clutch operation lever 38 is in the on operation position or the disengagement operation position is provided at the base end portion of the clutch operation lever 38.
Based on the detection result of the clutch operation position detection sensor 39, the control means 32 controls the drive of the actuator 37 to switch the PTO clutch 36 between the engaged state and the disengaged state.

  When the clutch operation position detection sensor 39 detects the engaged state of the PTO clutch 36, the operation of the opening / closing actuator 30 is restricted. That is, when the mowing blade 8 of the mower 4 is operating with the PTO clutch 36 engaged, the operation of the opening / closing shutter 15 that opens and closes the discharge port 9A of the mower deck 9 is restrained.

  Further, a timer 40 is provided, and when the PTO clutch 36 is operated to be disconnected and this is detected by the clutch operation position detection sensor 39, the timer 40 starts to be operated, and after a predetermined time has elapsed, the timer 40 is opened and closed. The operation of the shutter 15 for use is permitted. By introducing such a timer 40, even if the PTO clutch 36 is operated to be disengaged and the mowing blade 8 is subjected to frictional stopping force by a friction brake (not shown), the mowing blade is sent a little due to inertia and shifts to the cutting state. A control configuration corresponding to the operating characteristics of the blade 8 could be taken.

[Another embodiment]
(1) Although the opening / closing switching operation lever 19 has been described as the opening / closing switching operation tool, it may be a pedal or an opening / closing switching switch.
(2) The installation position of the switching operation tool for opening and closing is not necessarily arranged in the vicinity of the driver's seat 5, and may be installed at a position that can be operated in the driver's control unit 7.
(3) Although the mechanical link means employed as the link means between the open / close shutter 15 and the open / close switching operation tool 19 has been described using the release wire 20, other link mechanisms, gear structures, etc. You may use in combination.
(4) Although the mechanical link means used as the means for linking the opening / closing shutter 15 and the opening / closing switching operation tool 19 has been described using the release wire 20, the opening / closing shutter 15 is in the open state or A biasing means for biasing to the closed state may be introduced, and the release wire 20 may be merely operated to the closed state or the open state against the biasing force of the biasing means.
(5) As the opening / closing actuator 30 for the opening / closing shutter 15, a hydraulic cylinder, an electric cylinder, a rack gear, or the like can be appropriately selected.
(6) As the operation position detecting means for detecting the switching operation position of the opening / closing switching operation tool 19, an analog sensor such as a potentiometer or a digital sensor represented by a rotary encoder can be used.
(7) A mechanical linkage mechanism or an electrical linkage mechanism can be employed for the linkage with the opening / closing switching manipulation tool 19 or the locking switching manipulation tool 25 for switching the locking mechanism R.
(8) As the lock mechanism R, the configuration in the case where the closed state of the opening / closing shutter 15 is locked has been described, but a mechanism for locking the open state of the opening / closing shutter 15 may be provided.

Overall side view of riding mower Moor's top view Mohr's longitudinal rear view The top view which shows the wire linkage of the shutter for opening and closing, and the switching lever for opening and closing, and the wire linkage state of the locking mechanism and the lock switching lever A plan view showing a state in which the opening / closing shutter is switched to the open position A plan view showing the linkage between the opening / closing shutter and the opening / closing switching lever, and the linkage between the lock mechanism and the lock switching lever. (A) A plan view showing a locking mechanism in a state in which the opening / closing shutter is shifted to a closed state, (b) the opening / closing shutter is switched to a closed state, and a lock locking piece of the locking mechanism is engaged with a locking hole. (C) The top view which shows the state which switched the shutter for opening and closing to the closed state, and showed the locked state with the lock lever of the lock mechanism (A) A plan view showing a lock mechanism in a state in which the opening / closing shutter is being moved to the closed state, (b) a state in which the opening / closing shutter is switched to the closed state and the lock state is revealed by the lock lever of the lock mechanism. Plan view Top view showing the urging rubber A perspective view showing a locking mechanism The block diagram which shows 2nd Embodiment which operates the shutter for opening and closing and a lock mechanism.

Explanation of symbols

4 MOOR 7 Driving control part 8 Mowing blade 9 MOOR deck 9A Release port 15 Opening / closing shutter 19 Opening / closing switching operation lever (opening / closing switching operation tool)
20 Release wire (Mechanical linkage)
21 Lock fitting 22 Lock receptacle 25 Lock switching operation lever (Lock switching operation tool)
30 Opening / closing actuator 31 Operating position detecting means 32 Control means 35 Locking actuator R Locking mechanism

Claims (5)

A traveling aircraft equipped with a driving control unit is equipped with a mower. A passenger-type work vehicle equipped with a shutter for opening and closing,
An opening / closing switching operation tool is provided in the driving control unit, the opening / closing shutter and the opening / closing switching operation tool are linked, and the opening / closing shutter is opened and closed by a switching operation to the opening / closing switching operation tool. A passenger-type work vehicle configured to switch to a state.   2. The mechanical linkage means for mechanically transmitting the operation of the opening / closing switching operation tool to the opening / closing shutter is provided as means for linking the opening / closing shutter and the opening / closing switching operation tool. Passenger work vehicle.   Means for linking the opening / closing shutter and the opening / closing switching operation tool, an opening / closing actuator for driving the opening / closing shutter, an operation position detection means for detecting a switching operation position of the opening / closing switching operation tool, 2. The riding type work vehicle according to claim 1, further comprising: a control unit that drives and controls the opening / closing actuator based on detection information from the operation position detection unit.   4. A lock mechanism for locking the open / close shutter in the closed state is provided, and the open / close switching operation tool is configured to switch the lock mechanism between a locked state and an unlocked state. The passenger work vehicle described in one.   2. A locking mechanism for locking the opening / closing shutter in the closed state is provided, and a lock switching operation tool for switching the locking mechanism between a locked state and an unlocked state is provided separately from the opening / closing switching operation tool. 4. The passenger work vehicle according to any one of 3 to 3.

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