JPH09156393A - Operation part structure of passenger work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform travel even when a motor-driven actuator cannot be actuated by forming an operation hole into which an operation tool to operate a trunnion shaft can be inserted in an operation condition from above, in a cover to cover an upper part of a place containing the motor-driven actuator and the trunnion shaft. SOLUTION: A passenger rice-planting machine has an operation guide plate 17 in which a raising-lowering and work operation lever 15 is arranged in one lateral side part on the left and right of a driver's seat. Though this operation guide plate 17 is arranged so as to cover an upper part of an electric motor 22 and a trunnion shaft 23 of a static oil pressure type continuously variable transmission 11, in this case, an operation hole 34 into which an operation tool 33 to operate the trunnion shaft 23 can be inserted in an operation condition from above, is formed in the operation guide plate 17. This operation tool 33 guarantees travel and traveling speed change by operating the trunnion shaft 23 instead of the electric motor 22 when the traveling speed change by the electric motor 22 becomes impossible, and one end is formed in a U-shaped engaging part 35, and the other end is formed in an annular operation part 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an operating portion of a riding work machine such as a riding rice transplanter, and more specifically, a hydrostatic continuously variable transmission for traveling in which a trunnion shaft is operated by an electric actuator is provided. The present invention relates to an operating section structure of a riding work machine, which is provided with a cover that covers an upper part of a portion including the electric actuator and the trunnion shaft.

[0002]

2. Description of the Related Art According to the operation part structure of a riding work machine of this type, a traveling hydrostatic stepless transmission is configured to be operated by an electric actuator such as an electric motor. That is, when performing control such as automatic deceleration / acceleration associated with the raising / lowering of the seedling planting device at the traveling speed associated with the turning of the aircraft in the headland, the control system becomes simple and very useful.

Conventionally, as such an operation portion structure, only an electric actuator such as an electric motor is provided as an operation portion of a hydrostatic continuously variable transmission.

[0004]

However, according to the above conventional technique, when the electric actuator or its control device fails and the electric actuator becomes inoperable, the hydrostatic type continuously variable transmission shifts to a neutral position. State of, that is,
Although the vehicle is in a traveling stopped state, it cannot move forward or backward, and as a result, if the work is in progress, the work is interrupted and repairs or replacements of the faulty electric actuator or control device in the stopped field are performed. Had to do the service. In other words, the riding implement had to be left in the field until the fault was repaired.

An object of the present invention is to enable traveling even when the electric actuator is inoperable.

[0006]

The structure, operation and effect of the first invention according to the first aspect of the present invention are as follows.

[Structure] A hydrostatic continuously variable transmission for traveling in which a trunnion shaft is operated by an electric actuator is provided,
In a riding work machine provided with a cover that covers an upper part of a portion including the electric actuator and the trunnion shaft, an operation that allows an operation tool for operating the trunnion shaft to be inserted into the cover from above into the operating state. The point is that holes are formed.

[Operation] The trunnion shaft can be operated by inserting the operating tool from above through the operation hole formed in the cover while providing the cover covering the portion including the trunnion shaft. The shaft, that is, the hydrostatic continuously variable transmission can be operated manually instead of the electric actuator.

[Effect] As a result, even if the electric actuator or the control device therefor fails and the operation of the hydrostatic continuously variable transmission by the electric actuator becomes impossible and the vehicle cannot run, the operation tool is used. By manipulating the trunnion shaft manually, the hydrostatic stepless transmission can be operated.
Driving can be guaranteed, and it is possible to avoid leaving the riding implement in the field.

The structure, operation and effect of the second invention according to claim 2 are as follows.

[Arrangement] In the arrangement of the first aspect of the present invention, the cover is provided with an operation guide hole through which an operation lever provided in the riding operation section is vertically inserted to guide an operation movement of the operation lever. It is also used as a plate, and the operation hole is formed from the operation guide hole of the operation guide plate.

[Operation] Paying attention to the fact that the riding operation section is provided with various operating levers for lifting and lowering the working device, and the operation of forming an operation guide hole for guiding the operation of the operating lever. The guide plate is also configured as a cover, and the operation hole is formed from the operation guide hole of the operation guide plate, so that the structure can be simplified by using the cover and the operation guide plate together and the operation can be performed. The structure can be simplified by using the guide hole and the operation hole in common.

[Effect] As a result, the structure can be easily implemented.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An example of application to a riding rice transplanter, which is an example of a riding work machine, will be described. As shown in FIG. 1, the riding rice transplanter connects a seedling planting device 2, which is an example of a working device, to a rear portion of the riding self-propelled body 1 via a link 3 so as to be capable of swinging up and down, and via the link 3. A hydraulic cylinder 4 for raising and lowering the seedling planting device 2 with respect to the self-propelled vehicle body 1 is provided.

The passenger self-propelled vehicle body 1 is provided with a passenger driving section 7 having a steering handle 5 and a driver's seat 6, and a pair of left and right steering driving front wheels 8 and a pair of left and right driving rear wheels 9 are provided.
Engine 1 equipped with and installed in the front
0 power is applied to the hydrostatic continuously variable transmission 11 and the auxiliary transmission 12.
It is configured to be transmitted to the front steering driving wheel 8 and the rear steering driving wheel 9 via the.

In the passenger self-propelled vehicle body 1, a pair of left and right fenders 13 that cover the upper portions of the steering front wheel 8 and the rear drive wheel 9 in series also cover the lateral sides of the driver's seat 6. It is provided in.

On the left and right lateral sides of the driver's seat 6,
An operation lever 15 for lifting and lowering work for collectively performing related operations of the lifting hydraulic cylinder 4 for the seedling planting device 2 and the planting clutch 14 that intermittently transmits power to the seedling planting device 2 (passenger operating unit). 7) and an operation guide plate for the operation lever 15, that is, the operation lever 15
An operation guide plate 17 is provided which forms an operation guide hole 16 which is inserted in the vertical direction to guide the operation movement of the operation lever 15.

The operation guide plate 17 is formed with the fender 13 as shown in FIGS.

As shown in FIGS. 2 to 4, the operation guide hole 16 has a neutral position N, a raised position U located on one side of the neutral position N in the front-rear direction, and a lowered position located on the opposite side. The operation lever 15 is guided to D, the descending planting clutch disengaged position OD, the descending planting clutch engaged position ID, and the automatic position A.

The neutral position N is a position where the operating lever 15 and the lifting hydraulic cylinder 4 are linked so as to stop the lifting of the seedling planting device 2.

The raised position U is a position where the operating lever 15 and the lifting hydraulic cylinder 4 are linked so as to raise the seedling planting device 2.

In the riding rice transplanter, as shown in FIG. 6, the operation lever 15 is moved to the down position D, the down planting clutch disengaged position OD, and the down planting clutch engaged position I.
When the operation position is set to any one of D, the control valve 18 for the lifting hydraulic cylinder 4 is set to the seedling planting device 2
There is provided a control device 20 for controlling the seedling planting device 2 so as to move up and down to a height at which the detection result of the ground leveling float 19 for detecting the ground pressure attached thereto is a set value. That is,
With the seedling planting device 2 in the raised position, move the operating lever 15 to the lowered position D or the lowered planting clutch disengagement position O.
D, when the descending planting clutch engaged position ID is operated, the control valve 18 is operated and the seedling planting device 2 descends. After the descending grounding float 19 comes into contact with the ground, the ground pressure is set to the set value. It is designed to be automatically controlled.

The automatic position A is the forced lift switch 21.
This is the position where the seedling planting device 2 is raised by the raising operation of 1 and the seedling planting device 2 is lowered by the lowering operation of the forced elevating / lowering switch 21.

The hydrostatic stepless transmission 11 is shown in FIGS.
As shown in FIG. 4, the trunnion shaft 23 is operated by an electric motor 22 which is an example of an electric actuator, and the electric motor 22 malfunctions due to a failure of the electric motor 22 or its control device. In this case, the gear automatically returns to the neutral state.

As shown in FIGS. 2 and 3, the operation transmission system from the electric motor 22 to the trunnion shaft 23 is provided with a gear 24 driven by the electric motor 22 and a sector gear 25 meshing with the gear 24. , Its sector gear 25
A lever 26 that integrally rotates with an operating lever 27 that integrally rotates with the trunnion shaft 23 are interlockingly connected via a rod 28. The interlocking connection of the rod 28 to the lever 26 and the operating lever 27 is made by a bolt 29.
This is done via the nut 30. That is, the bolt 29
Serves as a support shaft when the rod 28 rotates with respect to the lever 26 and the operating lever 27 accompanying the operation transmission.

The electric motor 22 rotates in accordance with the operating position of the rocking type gearshift lever 31.
As shown in, a potentiometer-type rotation sensor S that detects the operation position of the shift lever 31 (the amount of swing from the reference).
1 is provided and a potentiometer-type feedback rotation sensor S2 for detecting the rotational position (rotation amount from the reference) of the electric motor 22 is provided, and the deviation between the detection value of the rotation sensor S1 and the detection value of the feedback rotation sensor S2 is A control device 32 that drives the electric motor 22 to zero (0) is provided so that the traveling speed corresponds to the operation position of the shift lever 31.

As shown in FIGS. 2 and 3, the hydrostatic continuously variable transmission 11, the electric motor 22 and the operation transmission system are arranged above and below the left and right lateral sides of the driver's seat 6, respectively. The outside is arranged to be covered by the fender 13 with the operation guide plate 17. That is, the operation guide plate 17 includes the electric motor 22, the operation transmission system, and the trunnion shaft 23.
The cover K covers the upper part of the. In addition, as shown in FIG. 3, the hydrostatic continuously variable transmission 11 has the trunnion shaft 2
3 is arranged so as to project outward.

In addition, the operation guide plate 17 covering the electric motor 22 and the trunnion shaft 23 from above is provided with an operation hole through which an operation tool 33 for operating the trunnion shaft 23 can be inserted into the operation state from above. 34 is formed.

More specifically, the operation tool 33 is the electric motor 2
When traveling shift by the electric motor 22 is disabled due to a failure of the control device 2 or the like, the trunnion shaft 23 is operated instead of the electric motor 22 to guarantee traveling and traveling shift. As shown in FIG. 4, the operation hole 34 is formed with an operation guide hole 16 formed in the operation guide plate 17, and the operation guide plate 17 and the trunnion shaft 23 are arranged in a plan view.
And the trunnion shaft 23 are arranged so as to overlap each other.
The portion of the operation guide hole 16 that overlaps the trunnion shaft 23 is preferably a position other than the neutral position N, as shown in FIG. Reference numeral 38 is an operation lever of the auxiliary transmission 12.

As shown in FIG. 4, the operating tool 33 has one end formed in a U-shaped engaging portion 35 and the other end formed in an annular operating portion 36. An example of the operation procedure of the trunnion shaft 23 by the operation tool 33 when the traveling gear shift is disabled at 22 will be described below.

When the seedling planting device 2 is raised to the raised position by operating the operating lever 15 to the raised position U and the seedling planting device 2 is raised to a predetermined raised position, the operating lever 15 is moved to the neutral position N. Then, the seedling planting device 2 is held in its predetermined elevated position, and then the operating lever 27
The bolt 29 that connects the rod 28 and the rod 28 is pulled out, and the connection between the operating lever 27 and the rod 28, that is, the interlocking of the operating lever 27 with the electric motor 22 is cut off. Then, the operation tool 33 is inserted into the operation guide hole 16 from above with the engaging portion 35 of the operation tool 33 at the top, and as shown in FIG.
The engaging portion 35 is inserted and engaged. In this state, the operation lever 27 can be swung by pushing and pulling the operation tool 33.

As described above, according to this embodiment, the electric motor 2 is damaged due to a failure of the electric motor 22 or its control device.
Even if the hydrostatic continuously variable transmission 11 cannot be operated in step 2, since the hydrostatic continuously variable transmission 11 that has returned to the gear shift neutral state can be operated by manual operation using the operation tool 33. , Never get stuck in the field. Since the operation guide hole 16 which is the operation hole 34 is arranged above the trunnion shaft 23, the engagement portion 35 at the lower end of the operation tool 33 and the operating lever 27 are observed while the operation guide hole 16 is used as a window and is viewed from above. While visually checking the positional relationship, the engagement portion 35 can be inserted and engaged with the bolt insertion hole 37, and the workability is good.

[Other Embodiments] In the above embodiment, the operation guide plate 17 for the operation lever 15 for lifting and lowering work is
Forming the operation hole 34 from the operation guide hole 16 by paying attention to the fact that the operation guide hole 16 is provided and the cover K that is located above the trunnion shaft 23 and covers the portion including the trunnion shaft 23 is also used. However, an operation hole 34 may be formed separately from the operation guide hole 16 in the operation guide plate 17 which is the cover K.

In the above embodiment, the operation guide plate 17 is shown for the operation lever 15 for lifting and lowering work, but the operation guide plate 17 is for the operation lever 38 of the auxiliary transmission 12. Is also good. That is, the operating lever L may be the operating lever 38 of the auxiliary transmission 12.

In the above-described embodiment, the operation guide plate 17 is located above the trunnion shaft 23 so that the operation guide plate 17 also serves as the cover K. When the operation guide plate 17 is not provided above the location and is covered with the cover K, the operation hole 34 is formed in the cover K.

In the above embodiment, the engaging portion 35 of the operating tool 33 is inserted into and engaged with the bolt insertion hole 37 formed in the operating lever 27, but the engaging portion 35 is inserted into the operating lever 27. It may be implemented by forming a dedicated hole for engagement.

In the above-mentioned embodiment, as the operation tool 33,
Although the trunnion shaft 23 is operated by inserting and engaging the engaging portion 35 into the bolt insertion hole 37, that is, the trunnion shaft 23 is detachable from the trunnion shaft 23.
The operation tool 33 may be an arm that rotates integrally with the trunnion shaft 23 or an operation lever 27 that is always interlockingly connected.

In the above embodiment, the electric motor is shown as the electric actuator 22, but the electric actuator 22 may be an electromagnetic solenoid or an electric cylinder.

In the above embodiment, an example of application to a riding rice transplanter is shown, but the present invention can be applied to various riding work machines.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a side view of an entire riding rice transplanter showing an embodiment.

FIG. 2 is a side view of a notched portion of a main portion showing an embodiment.

FIG. 3 is a cross-sectional plan view of essential parts showing an embodiment.

FIG. 4 is a side view of a notch of a main part showing an embodiment.

FIG. 5 is a block diagram of shift control showing an embodiment.

FIG. 6 is a block diagram of lifting / lowering control showing an embodiment.

[Explanation of symbols]

 7 Passenger Driving Section 11 Hydrostatic Stepless Transmission 16 Operation Guide Hole 17 Operation Guide Plate 22 Electric Actuator 23 Trunnion Shaft 33 Operation Tool 34 Operation Hole K Cover L Operation Lever

Claims (2)

[Claims] 1. A hydrostatic continuously variable transmission (11) for traveling in which a trunnion shaft (23) is operated by an electric actuator (22) is provided and includes the electric actuator (22) and a trunnion shaft (23). In a riding work machine provided with a cover (K) covering an upper part of a place, an operating tool (33) for operating the trunnion shaft (23) is inserted into the cover (K) from above in an operating state. The operation part structure of the riding work machine in which an operation hole (34) capable of being formed is formed. 2. The cover (K) is a passenger driving section (7).
The operation guide hole (1) for guiding the operation of the operation lever (L) by inserting the operation lever (L) provided in
The operation guide plate (17) forming 6) is also used, and the operation hole (34) is formed from the operation guide hole (16) of the operation guide plate (17).
The operating part structure of the riding work machine described.