JP2575061Y2 - Work vehicle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear axle case structure for a working vehicle such as a riding rice transplanter.

[0002]

2. Description of the Related Art
In this type of traveling vehicle, for example, as in the case of performing pest control work, there is a case where the vehicle travels along the strip so as to straddle the crop, so that contact between the bottom of the traveling machine body and the crop is avoided as much as possible. It needs to be considered. However, at both left and right ends of a front axle case and a rear axle case respectively disposed before and after the traveling body, a final case portion in which an axle is incorporated at a tip portion is disposed in a bent shape downward, particularly a rear axle. Since the final case portion of the case is large due to the side clutch and the like incorporated therein, there is a concern that the crop may be pushed down by being located closer to the center of the fuselage than the inner end of the front case portion of the front axle case.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been devised to provide a working vehicle capable of eliminating these disadvantages . At the left and right ends of the front axle case and the rear axle case, which are respectively arranged before and after the traveling body with the large-diameter rear wheels, a final case part in which the axle is assembled at the lower end is bent downward. In the working vehicle, the rear axle casing on the rear wheel side
The left and right wheels so that they face the middle diameter position of the rear wheel.
Main case with protruding end, left and right of the main case
The upper end is connected to both ends, and the rear wheel is axle at the lower end.
Supported, side clutch, final gear
An outer shell shall be formed with the final case,
While the main case is facing the inner surface of the rear wheel
A concave portion is formed from the intermediate diameter portion to the axle portion , and a rear axle case is formed to extend in the left-right direction so that a final case portion is inserted into the concave portion. The invention is characterized in that it is arranged on the outside of the fuselage with respect to the line connecting the inner end of the case with the final case. The present invention is Yotsute this configuration, when along connexion traveling between conditions to straddle the crop, is obtained as off by preventing a problem that pushing down crops.

[0004]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling body of a riding paddy working machine having a pest control device 2 attached to a rear portion thereof, and a front axle case 4 for steering a front wheel 3 and transmitting power is provided at a front lower portion of the traveling body 1. On the other hand, a rear axle case 6 for transmitting power to the rear wheel 5 is provided on the rear side as in the related art.

The front axle case 4 includes a differential 7
A main case 8, an upper final case 9 which is bent downward at left and right ends of the main case 8, and a lower end of the upper final case 9 which is rotatably and vertically slidably fitted. Upper final case 9
An outer shell is formed by the lower final case 10 or the like having a larger diameter than that of the lower final case 1 and a transmission mechanism from the differential 7 to the lower final case 10 is provided.
While the power transmission is performed to the front axle 11 mounted on the front wheel 3 and the lower final case 10 is connected to a tie rod 13 linked to the steering wheel 12, the front wheels 3 can be steered. The connecting portion between the lower case 10 and the lower case 10 is configured to be deviated below an intermediate portion of the case case (the upper case 9 and the lower case 10). That is, by bringing the final case connecting portion serving as the pivot of the front wheel 3 closer to the front wheel 3, the stress acting on the connecting portion is reduced as much as possible, so that the lower final case 1
The rotation and the vertical movement of 0 are made smooth, the upper case 9 having a small diameter is made longer, and the lower case 10 having a large diameter is made shorter to reduce the weight of the final case portion. 14 is the lower final case 1
This is a suspension coil ammunition that is installed in the final case section to urge 0 downward.

A connecting arm 15 is provided integrally with the lower final case 10. The tie rod 13 is connected to an upper end of the connecting arm 15. The connecting arm 15 is connected to the tie rod 13. Is formed so as to extend upward so as to position the connecting portion as high as possible. That is, the tie rod 13 is positioned as high as possible to secure a large effective ground clearance.

On the other hand, the rear axle case 6 is separated by a main case 16 which houses a differential (not shown) and a final case 17 which is bent downward at left and right ends of the main case 16. A shell is formed, and a power transmission from the differential to the final case 17 is provided to perform power transmission to a rear wheel axle 18 attached to the end of the final case 17. Clutch 1 intermittent
The front axle case 4 is formed with a larger diameter than the final case portion of the front axle case 4 in order to house the final gear 9 and a large diameter final gear 20 therein.

By the way, wherein at the front wheels is formed with a recess 5b is also the wheel 5a the inner surface of the rear wheel 5 to be assembled to the wheels of the vehicle <br/> shaft 18 after the large diameter than the outer of the recess 5b Diameter part
Of the final case 17 connected to the main case 16
From the part facing the upper end to the part reaching the axle,
Part from the upper end to the lower end of the final case 17
Position to secure a wide effective width of the bottom space of the aircraft. That is, the extension case 21 is interposed between the main case 16 and the final case 17, so that the final case 17 is moved to the left and right outer sides, and the rear wheel base is changed by inserting the final case 17 into the recess 5b. In this case, the final case 17 is positioned outside the fuselage with respect to the line L connecting the ground portion of the front wheel 3 and the inner end of the final case portion of the front axle case 4 in a front view. It is arranged to do.

Reference numeral 22 denotes an engine mounted in an engine compartment which is opened and closed by a front opening type bonnet B. A muffler 23 for discharging engine exhaust to the outside is provided on a side surface of the engine 22. However, the exhaust tube portion 23a of the muffler 23 protrudes forward from the front grill 24 so as to discharge engine exhaust toward the front of the fuselage.

In the embodiment of the present invention configured as described above, the final cases 17 provided at the right and left ends of the rear axle case 6 are inserted into the recesses 5b formed on the inner side surface of the wheel 5a of the rear wheel 5 so as to face the front. In view, it is disposed outside the fuselage with respect to a line L connecting the ground contact portion of the front wheel 3 and the inner end of the final case portion of the front axle case 4. Therefore, unlike the conventional case, the final case 17 of the rear axle case 6 is located inside the inner end of the final case portion of the front axle case 4 without narrowing the effective width of the space at the bottom of the body. The effective width of the space can be secured widely,
As a result, when traveling along the strip so as to straddle the crop, contact between the bottom of the machine body and the crop can be avoided as much as possible, and pushing down of the crop can be effectively prevented.

Further, in the embodiment, in the front axle case 4, the final case connecting portion serving as the pivot of the front wheel 3 is brought closer to the front wheel 3, so that the stress acting on the connecting portion is reduced as much as possible to lower the front axle case. It is possible to make the rotation and vertical movement of the final case 10 smooth, or to make the small-diameter upper final case 9 longer and the large-diameter lower final case 10 shorter, thus making the final case portion lighter. Can be measured. In addition, the connecting arm 15 provided integrally with the lower final case 10 is formed so as to extend upward so as to position the connecting portion with the tie rod 13 as high as possible.
By setting the tie rod 13 as high as possible, a large effective ground clearance can be secured.

Further, in the embodiment, since the exhaust tube portion 23a of the muffler 23 projects forward from the front grille 24 in order to exhaust the engine exhaust toward the front of the fuselage, the exhaust is discharged downward. The disadvantage is that the engine exhaust is blown directly to the crop, as in the case of discharging to the side, the inconvenience of blowing the engine exhaust to the step S where a person walks, and the case of discharging upward disadvantage entering rainwater from the exhaust pipe unit 23a, kill a disadvantage that spray the waste heat to the driver as in the case of discharging further rearward in prevention. In addition, the exhaust cylinder portion 23a is a front opening type
Because the front grille 24 is integrally formed on the front end projecting toward the front, it is the a Ku Tokyo if disturbing the opening and closing of Bon'netsuto B.

[0013]

[Effects] In summary, since the present invention is constructed as described above, the final case part in which the axle is assembled at the lower end is bent downward at the left and right ends of the front axle case and the rear axle case. The rear axle case is extended in the left-right direction, and the lower end where the large-diameter rear wheel is pivotally supported.
Not only the part but also the upper end connected to the main case
Put the final case part including it into the recess on the inner surface of the rear wheel and arrange it on the outside of the fuselage from the line connecting the ground contact part of the front wheel and the inner end of the final case part of the front axle case in front view , For rear axle case
Even though the side clutch is installed, a wide effective width of the body bottom space can be secured across the front and rear wheels. Therefore, when traveling along the strip so as to straddle the crop, the final case of the rear axle case is located inside the inner end of the final case of the front axle case as in the past, and the crop is actively contacted. Without contact, the contact with the crop can be avoided as much as possible, and the crop can be effectively prevented from being pushed down. As a result, the work performance in the control work and the like can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a traveling machine body.

FIG. 2 is a front view of the same.

FIG. 3 is a partially cutaway front view of a front axle case.

FIG. 4 is a partially cutaway front view of a rear axle case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling body 4 Front axle case 6 Rear axle case 9 Upper final case 10 Lower final case 17 Final case 21 Extension case

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masahiro Kuwaki 667 Iida-machi, Higashi-Izumo-cho, Yatsuka-gun, Shimane Prefecture Inside Mitsubishi Agricultural Machinery Co., Ltd. 667, Machi-cho 1 Mitsubishi Agricultural Machinery Co., Ltd. (56) References JP-A-2-274601 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) B60B 35/14-35/16

Claims (1)

(57) [Scope of request for utility model registration] 1. A front case in which an axle is assembled at a lower end thereof is directed downward at left and right ends of a front axle case and a rear axle case which are respectively disposed before and after a traveling body having a small diameter front wheel and a large diameter rear wheel. In the working traveling vehicle arranged in a bent shape, the rear wheel on the rear wheel side is provided.
The wheel case faces the middle diameter position of the rear wheel
And a main case with both left and right ends protruding.
The upper end is connected to the left and right ends of the base, and the rear wheel
Eel is pivoted, side clutch and final gear
An outer shell is formed with the interior final case
The main case is provided on the inner surface of the rear wheel.
A recess is formed from the opposed intermediate diameter portion to the axle portion , and the rear axle case is formed to extend in the left-right direction so that the final case portion is inserted into the recess, and the final case portion and the ground contact portion of the front wheel in front view. A work vehicle characterized by being disposed outside the fuselage with respect to a line connecting an inner end of a front axle case and a final case portion .