JPH10278849A - Riding work machine - Google Patents

Abstract

(57) [Problem] To prevent deterioration in cover function and strength of a rear cover caused by installation of operating tools, while maintaining good opening and closing workability of a rear cover. SOLUTION: A rear cover 18 having left and right rear wheel fender portions, a connecting plate portion connecting them, and an operation step portion 18C is configured to be freely openable and closable, and a driver seat is supported by the connecting plate portion of the rear cover 18. A front step 9 for getting on and off the front part of the rear cover 18 for getting on from the front part;
The opening 20 through which the operating tool 21 disposed in front of the driver's seat is inserted is formed in the front step 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear cover having left and right rear wheel fenders, a connecting plate for connecting the rear fenders, and an operation step. The present invention relates to a riding type working machine such as a wetland working machine typified by a riding type rice transplanter in which a seat is supported and a front step for getting on and off for getting on from the front portion is continuously provided at a front portion of the rear cover. .

[0002]

2. Description of the Related Art When using a riding type working machine of this type, the rear cover is openable and closable. Therefore, by opening the rear cover, maintenance under the rear cover can be performed with good workability. Because it is provided,
By arranging the body so that the front of the body abuts against the ridge, there is an advantage that the user can get on and off without entering the field.

Conventionally, such a riding type working machine has been
One disclosed in Japanese Patent Application Laid-Open No. Hei 4-5183 is known. In this configuration, a differential lock pedal as an operating tool disposed forward of a driver's seat is disposed in a driving step portion of a rear cover. That is, the opening is formed so that the differential lock pedal is inserted through the operation step portion and protrudes upward.

[0004]

However, according to the above-mentioned prior art, in order to open and close the rear cover with good workability without removing the differential lock pedal, an arm portion of the differential lock pedal is formed as an opening through which the differential lock pedal is inserted. Not only that, a large enough tread to pass through the tread portion is required, and the opening becomes large. As a result, not only the cover function of the rear cover becomes low, but also the large opening becomes large. By being formed, the strength of the rear cover is easily reduced.

SUMMARY OF THE INVENTION An object of the present invention is to avoid a decrease in the cover function and strength of the rear cover due to the installation of the operating tool, while maintaining good opening and closing workability of the rear cover.

[0006]

The features, functions and effects of the first aspect of the present invention are as follows.

[Features] A rear cover having left and right rear wheel fender portions, a connecting plate portion for connecting them, and an operation step portion is configured to be freely openable and closable, and a driver seat is supported by the connecting plate portion of the rear cover. A riding work machine having a front part of the rear cover and a front step for getting on and off for getting on from a front part connected thereto, wherein an opening through which an operating tool disposed forward of the driver's seat is inserted. Is formed in the front step.

According to the first aspect of the present invention, since the opening for inserting the operation tool is formed not in the rear cover but in the front step, interference with the opening and closing of the rear cover by the operation tool can be avoided.

In addition, as the opening formed in the front step, a small portion of the operating tool having a small cross section such as an arm portion having a tread surface connected to the upper end and a lever portion having a grip portion connected to the upper end is inserted. It only needs to be large enough to make it work.

[Effects] Therefore, according to the first aspect of the present invention, it is possible to maintain good open / close operability of the rear cover,
A reduction in the cover function and a reduction in strength of the rear cover due to the installation of the operating tool can be avoided, and a reduction in the strength of the front step caused by forming an opening in the front step can be suppressed as much as possible.

According to the second aspect of the present invention, the features, operations and
The effects are as follows.

[Features] In the features of the first invention,
One of the operation tools is a differential lock pedal.

[Operation and Effect] According to the second aspect of the present invention,
While maintaining good rear cover opening and closing operability, it is possible to avoid a decrease in the cover function and strength of the rear cover due to the installation of the differential lock pedal, which is an example of the operating tool. The strength reduction of the front step caused by the formation can be suppressed as much as possible.

According to the third aspect of the present invention, the features, operations and
The effects are as follows.

[Features] In the features of the first and second aspects of the present invention, another one of the operating tools is an auxiliary speed change lever.

[Action and Effect] According to the third aspect of the present invention,
While maintaining good rear cover opening and closing workability, it is possible to avoid a decrease in the cover function and strength of the rear cover due to the installation of the sub-transmission operation lever, which is an example of the operating tool, and furthermore, the front step The reduction in the strength of the front step caused by the formation of the opening can be suppressed as much as possible.

According to the fourth aspect of the present invention, the features, functions,
The effects are as follows.

[Features] In the features of the first, second, and third aspects of the present invention, the handle post disposed in front of the driver's seat has a support for holding an operation knob of a recoil starter. The point is that it is assembled.

[Operation] According to the fourth aspect of the present invention, since the support for holding the operation knob of the recoil starter is assembled to the strong handle post, for example, as compared with the case where the support is attached to the engine bonnet. ,
The support can be strongly supported.

[Effect] Therefore, according to the fourth aspect of the present invention, the operation knob can be reliably and strongly held.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a riding type rice transplanter representing a paddy field working machine, which is an example of a riding type working machine, has a seedling rest 3A at the rear of the riding type self-propelled body 1. The provided seedling planting device 3 is connected via a link mechanism 2 so as to be able to move up and down, and a hydraulic cylinder 4 for driving and raising and lowering the seedling planting device 3 is provided.

As shown in FIGS. 2 and 3, the self-propelled body 1 includes a transmission case 8 supporting a pair of left and right front wheels 7.
A front step 9 made of metal (such as iron) is connected to a front portion of a body frame 6 provided with an axle case 5A pivotally supporting a pair of left and right rear wheels 5 in a cantilever shape facing forward. 9 has a frame structure in which a front portion of the transmission case 9 and a front portion of the transmission case 8 are connected by a connection frame 10. The front wheel 7
Are steering drive wheels, and the rear wheels 5 are drive wheels.

As shown in FIGS. 2 to 4, 6, and 8, the body frame 6 includes a pair of left and right main frame members 6A having a front and rear posture and a pair of right and left side Frame material 6B and main frame material 6A
And a front frame member 6C in a left-right orientation connecting the front ends of the side frame members 6B, and a rear end portion of the side frame 6B is formed as a connecting portion 6a bent inward and connected to the main frame 6A. . The main frame member 6A and the side frame member 6B are also connected by supporting frames 62 and 63 for supporting the pair of right and left steps 61 on the main frame member 6A and the side frame member 6B.

Then, a driver's seat 11, a steering handle 12,
At the front of the operation unit having the operation step 13, the driving unit 1
4 is provided, and the engine 1 which is the main
5 is mounted over the transmission case 8 and the connection frame 10. Specifically, as shown in FIGS. 2 and 3, the front portion of the base 15 </ b> A on which the engine 15 is mounted and fixed is mounted and supported on the connecting frame 10 via a pair of right and left rubber vibration isolators 50. The rear portion of the base 15A is mounted and supported on the transmission case 8 via a pair of left and right rubber vibration isolators 51.

From the engine 15 to the transmission case 8
2 and 3, an output shaft 15a of the engine 15 and an input shaft 8 of the transmission case 8 are provided.
a first auxiliary transmission 53 capable of two-stage shifting by selectively engaging and operating two belt tension clutches having different transmission ratios provided over the other belt tension clutch. The transmission is interrupted by transmitting the power of the engine 15 to the transmission case 8 when the transmission is turned on, and by disengaging both belt tension clutches.

The front part step 9 is for getting on and off for getting on and off from the front part, and as shown in FIGS. It comprises a part 9A, a front step part 9B located in front of the driving part 14, and a rear step part 9C forming a part of the front part of the operation step 13. The front step 9 has a structure in which the left and right stepping steps 9A are connected by a front step 9B at the front and connected by a rear step 9C at the rear, that is, the engine 15 mounted on the transmission case 8. Is formed in a hollow structure in which an opening 16 for inserting a through hole is formed independently.

As shown in FIG. 7, the prime mover 14 is covered with an engine bonnet 17 made of synthetic resin disposed on the opening 16 of the front step 9. The engine bonnet 17 includes an upper cover portion 17a, a rear cover portion 17b, and a front cover portion 17c which can swing freely. As shown in FIG. 5, a recoil starter 72 for starting the engine 15 by pulling a rope 71 inserted through a hole 70 formed in the rear cover portion 17b is disposed in the engine hood 17. The support 74 for holding the operation knob 73 serving as a pull handle and the roller 75 for guiding the movement of the rope 71 are
It is attached to a stay 78 which is attached via a bolt 77 to a handle post 76 which is located in front of the driver's seat 11 and supports the steering handle 12. That is, it is attached to the handle post 76. Handle post 76
Are fixed to a steering case section formed from an upper portion of the transmission case 8. Support 74
The wire is spirally wound, and also serves as a guide for preventing the rope 71 from rubbing against the peripheral edge of the hole of the rear cover portion 17b.

Reference numeral 79 in FIG. 2 denotes an operating rod for opening and closing the fuel cock through which the rear cover portion 17b is inserted.
Is an operation rod for operating a choke lever through which the rear cover 17b is inserted.

A rear cover 18 made of a synthetic resin is mounted on the body frame 6.
The right and left rear wheel fender portions 18A as shown in FIG.
And a connecting plate portion 18B for connecting them and the rear step portion 9C to form an operation step portion 1 forming an operation step 13
8C, and the driver's seat 11 is supported by the connecting plate 18B. As shown in FIGS. 1 and 8, the rear cover 18 is attached to the body frame 6 so as to be swingable up and down around the rear portion X1, and can be opened upward beyond the steering handle 12. Have been. More specifically, a concave portion 3 having a size large enough to allow the steering handle 12 to pass therethrough along with the upward swing at the middle in the left-right direction at the front end edge of the driving step portion 18C.
By forming 0, the driving step portion 18C moves from the falling closed posture forming a part of the driving step 13 to the standing open posture in which the center of gravity G is located beyond the steering handle 12 and behind the center X1 of swing. It is configured to swing.

As shown in FIG. 8, the means for attaching the rear cover 18 to the body frame 6 so as to be able to swing up and down around the center X1 is provided by supporting brackets 54 and 55 fixed to the left and right connecting portions 6a and the rear cover 18. This is means for connecting with a bolt 56 and a nut 57 which also serves as a shaft.

As shown in FIG. 1, the means for holding the rear cover 18 in the upright and open position is provided by receiving and supporting the driver's seat 11 at the upper end of the seedling rest 3A of the lowered seedling planting device 3. It is a means to support by leaning.

As shown in FIGS. 3 and 8, the means for fixing the rear cover 18 in the upright closed position is as follows.
A pair of left and right hooks 59 are attached to the bracket 8, and the hook 59 is detachably engaged with the bracket 59 fixed to the side frame member 6B in a state in which the rear cover 18 is in the lying-down closed posture. This is a means for attaching a buckle 60 for holding and pressing the rear cover 18 against the body frame 6 by holding.

The rear step 9C of the front step 9 is formed in a convex shape that enters the recess 30 of the rear cover 18 in the lying closed position and forms the operation step 13 with the operation step 18C. I have.

An operating tool 21 is arranged at the foot of the driver's seat 11 in front of the driver's seat 11 so as to pass through the opening 20 formed in the front step 9. The operation tool 21 includes:
It includes a traveling clutch pedal 21a, a pair of left and right steering clutch brake pedals 21b, a front wheel differential lock pedal 21c, and an auxiliary speed change operation lever 21d. The traveling clutch pedal 21a is configured to put both of the belt tension clutches into the disengaged state by a depression operation. The steering clutch brake pedal 21b is
By a two-step depression operation, a clutch / brake (not shown) for the left and right rear wheels 5 is sequentially operated in a clutch disengaged state and a brake operated state by disengaging the clutch. The differential lock pedal 21c activates a differential lock device (not shown) for the front wheels 7 in the transmission case 8 by depressing operation. The auxiliary transmission operation lever 21d is operable in the left-right direction and can be moved in the left-right direction. As shown in FIG. (Not shown) to the ultra-low speed transmission state,
By being located at the medium speed position M, the second auxiliary transmission is switched to the medium transmission state, and by being located at the high position H, the second auxiliary transmission is switched to the high transmission state. The second subtransmission is switched to the non-transmission state by being located at the neutral position N between the middle speed position M and between the middle speed position M and the high speed position H.

The opening 20a through which the traveling clutch pedal 21a is inserted is formed at the rear of one of the left and right stepping steps 9A, and the opening 20b through which a pair of left and right steering clutch brake pedals 21b is inserted.
Are formed in the other left and right stepping portion 9A, and an opening 20c through which the differential lock pedal 21c is inserted and an opening 20d through which the auxiliary speed change operation lever 21d is inserted are formed in the rear step portion 9C. Further, a lever guard 36 for the auxiliary speed change operation lever 21d is provided on the rear step portion 9C.

The lever guard 36 is constructed by raising a portion of the rear step portion 9C near the sub-transmission operation lever 21c. The lever also serves as a lever guide for guiding the operation of the lever 21d.
That is, the opening 20 through which the sub-transmission operation lever 21d is inserted.
c is formed in a portion one step higher than the upper surface of the operation step 13.

[Alternative Embodiment] In the above-described embodiment, a recess 30 is formed in the middle of the front edge of the driving step portion 18C in the left-right direction so as to allow the steering handle 12 to pass along with the upward swing. Although the swinging of the rear cover 18 to the standing open position is allowed, the operation step portion 18C
The front edge of the rear cover 18 may be retracted to a position where it does not hit the steering handle 12 with the upward swing, thereby allowing the rear cover 18 to swing to the upright open position.

[Brief description of the drawings]

FIG. 1 is an overall side view.

FIG. 2 is a cutaway side view of the front part.

FIG. 3 is a cutaway plan view of the front part.

FIG. 4 is a plan view of a sub-transmission guide groove.

FIG. 5 is a cutaway side view of the operation unit of the recoil starter.

FIG. 6 is a longitudinal rear view.

FIG. 7 is a perspective view of a rear cover.

FIG. 8 is a rear view of a main part of the self-propelled body.

FIG. 9 is a perspective view of a front part.

[Description of Signs] 9 Front Step 11 Driver's Seat 18 Rear Cover 18A Rear Wheel Fender 18B Connecting Plate 18C Operation Step 20 Opening 21 Operating Tool 21c Diff Lock Pedal 21d Sub-Shift Operating Lever 72 Recoil Starter 73 Operating Knob 74 Support 76 Handle post

Claims (4)

[Claims] A rear cover having left and right rear wheel fender portions, a connecting plate portion connecting the right and left rear wheel fender portions, and an operation step portion, is configured to be freely openable and closable, and a driver seat is supported by the connecting plate portion of the rear cover; A front side of a rear cover, a riding type work machine having a frontal step for getting on and off for getting on from a front side, wherein an opening through which an operating tool disposed in front of the driver's seat is inserted. A riding work machine formed in the front step. 2. The riding type working machine according to claim 1, wherein one of the operating tools is a differential lock pedal. 3. The riding type working machine according to claim 1, wherein another one of the operating tools is an auxiliary speed change operating lever. 4. The support according to claim 1, wherein a handle for holding an operation knob of a recoil starter is mounted on a handle post disposed in front of the driver's seat.
Riding work machine according to the paragraph.