JPH0488909A - Riding type work equipment - Google Patents

Abstract

PURPOSE:To operate a lifting and lowering mechanism, a clutch mechanism and a speed change mechanism without causing maloperation with one operating lever by relating the lifting and lowering mechanism to the clutch mechanism and changing over the speed change mechanism by operation of the operation lever in another direction. CONSTITUTION:A lifting and lowering mechanism is related to a clutch mechanism so as to change over a working device from a lifted position to a lowered position by operating an operation lever 41 in a prescribed direction and connect a clutch with the clutch mechanism by further operation in the same direction. When the operation lever 41 is operated from the position of the connected clutch in another direction, the speed change mechanism is related so as to be changed over from a low to a high speeds.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a riding-type working machine with improved operability.

[Conventional technology and its issues]

As a prior art of this type, as shown in Japanese Utility Model Publication No. 1-32830, a lifting mechanism is provided using a single operating lever.

There are devices that operate the clutch mechanism and transmission mechanism, but
The operating lever shown in the conventional example has a straight line in its operating direction, has six operating positions in the same operating direction, has a long operating stroke, and has poor operability. When switching, a worker may find it difficult to grasp the switching position and inadvertently operate at high speed, or may be unable to judge whether the speed is low or high and hesitate to operate for a moment, becoming anxious and stopping the work. Ta.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a lifting mechanism for lifting and lowering a working device; a clutch mechanism for intermittent power to the working device;
and a riding type working machine in which a transmission mechanism is provided in a power transmission section from the engine to the traveling wheels and the working device, in which the elevating mechanism, the clutch mechanism, and the transmission mechanism are operated with one operating lever.

The lifting mechanism and the clutch mechanism are arranged so that when the lifting mechanism is operated in a certain direction from the operating lever position where the working equipment is raised, the lifting mechanism is switched to the lowered position of the working equipment, and when the lifting mechanism is further operated in the same direction, the clutch mechanism is engaged. The present invention relates to a riding-type working machine, and is characterized in that the operating lever is connected to switch the transmission mechanism from low speed to high speed by operating the operating lever in a direction different from the operating direction from the clutch engaged position. .

〔Effect of the invention〕

In this invention, when the elevating mechanism, the clutch mechanism, and the speed change mechanism are operated with one operating lever, when the elevating mechanism is operated in a certain direction from the position of the operating lever where the operating device is in the ascending position, the operating device is in the descending position. The lifting mechanism and the clutch mechanism are related so that the clutch mechanism engages when the clutch mechanism is engaged when the operating lever is switched to the clutch engagement position when the operating lever is operated in a direction different from the operating direction from the clutch engagement position. Since the mechanism is related to switching from low speed to high speed, the lifting and lowering mechanism and the clutch mechanism can be operated with one operation lever without erroneous operation.

and the transmission mechanism can be operated, and the problems in the conventional example can be solved with a simple configuration.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS A riding-type rice transplanter, which is a type of riding-type work machine, which is an embodiment of the present invention shown in the drawings, will be described below.

Reference numeral 2 denotes a passenger-type traveling device, in which an engine 5 is mounted on the upper surface of the central part in the longitudinal direction of the left and right frames 3 and 4 that constitute the aircraft body, and the engine 5 is fixedly connected to the left and right frames 3 and 4 on the left side surface thereof. The traveling mission case 6 is fixed with bolts, and the engine 5 and the traveling mission case 6 are in a so-called direct connection type configuration. The traveling transmission case 6 includes a main transmission mechanism in which the rotating piece power of the engine 5 is changed by a main transmission lever 7, an auxiliary transmission mechanism in which the speed is changed by an operation lever 41 (to be described later), and a front wheel differential mechanism. has been done. As shown in Fig. 3, the main shift lever 7 has a road speed position (high speed), a working speed position (low speed), a neutral position N, and a reverse position R. 7
The speed change operation path A is configured to be operated linearly in the longitudinal direction of the aircraft.

Reference numeral 8.8 denotes left and right front axle cases, which are fixed to the left and right side portions of the traveling transmission case 6.

Reference numeral 9.9 denotes a left-right steering front wheel, which is attached to the lower part of the left and right front axle cases 8, 8, and is connected to the steering handle 1 described later.
It is steered at 0.

Reference numeral 11 denotes a rear wheel drive case, which is fixed to the rear end portions of both the left and right frames 3.4, and left and right drive rear wheels 12.12 are mounted on both left and right sides thereof.

13 is from the driving transmission case 6 to the rear wheel drive case 1
It is a transmission shaft that transmits power to 1.

In the transmission mechanism inside the rear wheel drive case 11, left and right side clutches and left and right side brakes for the left and right rear wheels 12 and 12 are built-in. The left and right side clutches are disengaged and the left and right side brakes are activated by depressing the provided left and right clutch pedals 15 and 16. That is, the drive of the driving rear wheels 12, 12 on the side where the left and right clutch pedals 15, 16 are depressed is stopped, and the brake is applied.

Reference numeral 17 denotes a vehicle body cover molded from FRP, which includes a part of the engine cover that covers the periphery of the engine 5 and the engine 5.
Steps 14 provided at the front and on the left and right sides are integrally formed and fixed on the left and right frames 3.4. The steps 14 extend from both left and right sides of the operating handle 10 to the front to form left and right passages A-A, and the front parts of the left and right passages A-A are connected and are on the same plane as the front steps 14'.
It consists of

Reference numeral 18 denotes a driver's seat, which is attached to the upper part of the vehicle body cover 17.

Reference numeral 19 denotes a preliminary seedling stand formed into a shallow box-like shape with a low plate and four side walls, the inner surface of which serves as a seedling holding part 20. are fixed to the upper ends of the left and right spare seedling frames 21.21, and the seedling raising box containing the seedlings can be placed on the seedling mounting section 20 inside thereof.

22 is a link mechanism composed of an upper link and a lower link, the base end of which is pivotally connected to the support frames 23, 23, 24, 24 fixed to the left and right frames 3.4, and the rear end of the link mechanism 22 is pivotally attached to a vertical frame 27 provided with a rolling shaft 26 that supports the seedling planting device 25 in a rollable manner.

Reference numeral 28 denotes a hydraulic cylinder device, in which the base of the cylinder is pivotally connected to the rear side of the traveling transmission case 6, and the rear end of the piston is pivotally connected to a swing arm 29 that is integrated with the upper link.

Reference numeral 30 denotes a front cover made of synthetic resin that covers the periphery of the handle post 10', and is fixed to the upper surface of the front end of the step 14, and the upper surface is equipped with various display devices and meters. It's a panel. The main shift lever 7 is provided on the side of the front cover 30.

31 is a main clutch pedal provided on the left side of the front cover 30.

The seedling planting device 25 includes a planting transmission case 32 that also serves as a frame and is mounted on the rolling shaft 26 of the vertical frame 27 so as to be able to roll freely, and a lower support member 33 and an upper support member 34 provided on the planting transmission case 32. A seedling platform 35 that is supported by and reciprocates in the left-right direction of the machine, and a seedling platform 35 that is attached to the rear end of the planting transmission case 32 and divide one seedling each from the lower end of the seedling platform 35 and plant them in the field. Seedling planting is done using device 36...
- A central soil leveling float 38 and a left and right leveling float 1, which is a ground leveling body whose rear part is pivotally supported by a shaft 37 and whose front part is swingable up and down at the lower part of the planting transmission case 32.
It is composed of etc. The left and right leveling floats 1 are arranged behind the left and right drive rear shafts 12 and 12, and the left and right drive rear shafts 12 and 12 level the disturbed field, and seedling planting is done using a device 36 for seedling planting. It is installed to level the ground in front of the field where rice is to be planted.

39 is a hydraulic valve provided between the front upper surface of the central soil leveling float 38 and the planting transmission case 32, and when the front portion of the central soil leveling float 38 is lifted beyond the appropriate range by an external force, the traveling mission is activated. A hydraulic pump 40 attached to the left side of the case 6 pumps pressure oil from inside the travel transmission case 6 to the hydraulic cylinder 28 to project the piston, move the link mechanism 22 upward, and start the seedling planting device 25. When the front part of the central soil leveling float 38 is lowered beyond the appropriate range, the pressure oil in the hydraulic cylinder 28 is returned to the traveling transmission case 6, and the link mechanism 22 is moved down to lower the seedling planting device. 25 is lowered to a predetermined position, and when the front part of the central soil leveling float 38 is within a proper range (when the seedling planting device 25 is in a proper predetermined position), the flow of pressure oil into and out of the hydraulic cylinder 28 is stopped. It is provided to hold the seedling planting device 25 in a fixed position.

Reference numeral 41 denotes an operation lever that protrudes from the right side of the front cover 30 and is provided on the lower right side of the control handle 1o, and is used to connect and disconnect the power to the transmission shaft 42 provided in the traveling transmission case 6. It is configured so that it can be operated to manually control the power to the seedling planting device 25, and
The seedling planting device 25 is configured to be able to be moved up and down manually by operating a hydraulic valve 39. That is, when the operating lever 41 is set to the "fixed" position as shown in FIG.
9 is switched to a position where the pressure oil in the hydraulic cylinder 28 is stopped from flowing in and out and the seedling planting device 25 is held at a constant position,
The seedling planting device 25 is held at the position when the operating lever 41 is operated to the intermediate position, and the seedling planting device 25 neither rises nor descends. When the operating lever 41 is operated forward to the "down" position, the PTO clutch is disengaged and the operation of the seedling planting device 25 remains stopped, but the hydraulic valve 39 is switched by the vertical movement of the central soil leveling float 38. automatically controlled state. Further, when the operating lever 41 is operated forward to the "on" position, the PTO clutch is engaged and the seedling planting device 25 is driven, and the hydraulic valve 39 is switched to an automatic control state by the vertical movement of the central soil leveling float 38. becomes. Conversely, if you operate the operating lever 41 backwards to the "up" position, the P
The To clutch is disengaged, the operation of the seedling planting device 8 is stopped, and the hydraulic valve 39 is forcibly switched to the side that raises the seedling planting device 25, so that the seedling planting device 25 is raised.

On the other hand, the operating lever 41 is also connected to the auxiliary transmission mechanism inside the traveling transmission case 6, and is connected to the above-mentioned "up" and "fixed"
The speed is changed to a low working speed at the operation path entrance between the "down" and "on" positions, and the speed is changed from low to high by operating from the "on" position outward to the right. That is, the working speed is changed between low speed and high speed in operation path C in the "on" position. In addition, in Figure 3, 41
a is an operation wire for connecting and disconnecting the PTO clutch, 41
b is an operation wire 41 for operating the hydraulic valve 39;
c is an operation iron for operating the sub-transmission mechanism.

In addition, the operating lever 41 is in each operating position "up" and "fixed".
A well-known positioning locking device (cam type/ball stopper type) is provided so that positioning can be performed at ``down'', ``low speed on'', and ``high speed on''.

Reference numeral 42 denotes a recoil starter for starting the engine 5, and a knob 43 thereof is provided on the right side of the operating lever 41 on the outside of the vehicle body cover 17.

44 is a reinforcing frame provided between the rear side of the traveling transmission case 6 and the front side of the rear wheel drive case 11.

Reference numeral 45 denotes a differential lock pedal of a front wheel differential mechanism in the transmission system of the driving front wheels 9, 9, and is provided in front of the engine 5.

The riding-type seedling transplanter configured as described above is placed in a paddy field, the seedlings are placed on the seedling stand 35, the seedling box containing the seedlings is placed on the preliminary seedling stand 19, and recoil is carried out. Pull the knob 43 of the starter 42 to start the engine 5, set the main gear shift lever 7 to working distal IEI (low speed), and operate the operating lever 41 forward to the "on" position to drive each part and move the aircraft forward. If so, the seedling planting device 25 is automatically controlled up and down to the proper position and rice planting work is performed.

If the operator is an expert, the operation lever 41 is
By operating in the convex direction at the "ON" position to achieve a high working speed, work efficiency will be improved.

Here, the actual planting work process when using this high work speed will be explained. First, at the edge of a ridge, the operating lever 41 is set to the "up" position to raise the seedling planting device 25 and turn the machine. Then, the operation lever 41 is moved to the lower j position, the seedling planting device 25 is lowered, and the machine is directed in the planting direction. , the operation lever 41 is placed in the "on" position to start planting.

When the machine is in a stable straight-ahead state, the operating lever 41 is operated in a convex direction to increase the operating speed and perform seedling planting work. Then, when approaching the ridge, the control lever 4
1 is set to a low working speed, the seedlings are planted to the position where they were planted in the previous step, and the operation lever 41 is turned to the "up" position again to turn the machine. At this time, the turning operation at the edge of the ridge can be performed accurately and without any erroneous operation at a low working speed, resulting in very good workability.

When leaving the field after planting seedlings and moving on the road, move the main gear shift lever 7 to the road travel distal position ff1II.
to move the control lever 41 to the "fixed" position and drive at high speed.

Further, in the above embodiment, the high-speed gear shifting operation in the "on" position was performed by directing the operating lever 41 toward the outer right side of the aircraft body, but as shown in FIG. It may also be performed by operating toward the inside left of the body in the "on" position. Furthermore, as shown in Fig. 6, if the gear is configured to be able to change gears at high speed even in the "fixed" position and the "lower" position, it is convenient to be able to move at high speed when moving in the field or on the road. .

In the above embodiment, an example was shown in which the present invention was applied to a riding-type seedling planting machine in which the seedling-planting device 25 was attached to the rear of the riding-type traveling vehicle body 2, but the present invention could be applied to any other riding-type working machine. may be carried out.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the present invention, in which Fig. 1 is a side view, Fig. 2 is a plan view, Fig. 3 is a perspective view of main parts, and Fig. 4 is a main part. The partial plan view and FIGS. 5 and 6 are operation route diagrams of the operation lever 41 showing other embodiments. Note that the symbols in the figure are as follows. 7... Main gear shift lever 10... Control handle 18
... Control seat 41 ... Control lever representative
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Claims (1)

[Claims] (1) In a riding type work machine equipped with a lifting mechanism that raises and lowers the work equipment, a clutch mechanism that connects and disconnects power to the work equipment, and a transmission mechanism in the power transmission section from the engine to the traveling wheels and the work equipment, one operation is required. When the lifting mechanism, clutch mechanism, and transmission mechanism are operated by levers, when the lifting mechanism is operated in a certain direction from the operating lever position where the working equipment is raised, the working equipment is switched to the lowered position, and further in the same direction. The lifting mechanism and the clutch mechanism are related to each other so that the clutch mechanism is engaged when the clutch is engaged, and the transmission mechanism is switched from low speed to high speed when the operating lever is operated in a direction different from the operating direction from the clutch engaged position. A riding type work machine characterized by the following.