JP2002037138A - Operation unit structure of work machine - Google Patents

Abstract

(57) [Problem] To provide a driving unit structure provided with a handrail body capable of reducing the weight and cost without lowering the strength and function, and enabling complicated shape setting. SOLUTION: A bonnet upper surface 2 is provided at a right position of a driver's seat.
The handrail body 21 erected on the upper side d is blown so that a pipe-shaped handrail portion 13 projects from the mounting base 12 supported on the upper surface 2d of the bonnet in a bilaterally held state and has a substantially loop shape when viewed in the left-right direction. It is formed into a hollow integrally formed product by molding, and forms upper and lower left and right inner ribs 16 and 17 and a horizontal inner rib 18 extending from the mounting base 12 to the inside of the handrail portion 13 inside the handrail body 21. .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving unit structure of a riding type working machine such as a combine or a transport vehicle, and more particularly to a technique for reducing the cost and weight by reviewing the structure around the driving unit. .

[0002]

2. Description of the Related Art Conventionally, a type working machine in which a bonnet having a driver's seat arranged on an upper part thereof is provided upright behind a floor step arranged on one of left and right ends of an airframe is disclosed in Japanese Patent Laid-Open No. 10-109542. What is shown in the gazette is known. In this combine, a handrail (not shown) that stands upright from the upper surface of the bonnet is placed upright on the lateral outside of the driver's seat, and when riding on a floor step from outside the aircraft,
A good handrailing function can be exhibited when sitting on the driver's seat from a floor step.

[0003]

The main part of the conventional handrail body is constituted by joining sheet metal members.
According to this, the weight tends to be heavy, and it is difficult to create a complicated shape such as a three-dimensional curved surface, and there is still room for improvement in weight reduction and design. In addition, resin parts are inferior to sheet metal in material strength, so it is impossible to simply replace the material,
In fact, it was only used as a partial cover part, and was not set for the main part with strength.

[0004] An object of the present invention is to provide a driving unit structure provided with a handrail body that can be reduced in weight and cost without lowering the strength and function by reviewing the structure, and that can also set a complicated shape. On the point.

[0005]

[Means for Solving the Problems] [Structure] In the structure of the first aspect, a bonnet having a driver's seat arranged on an upper portion is provided upright behind a floor step arranged on one of the right and left ends of the body. In the operating part structure of the work machine, a handrail body standing upright on the upper surface of the bonnet at an outer position in the lateral direction of the body of the driver seat is projected from a mounting base supported by the upper surface of the bonnet with a pipe-shaped handrail part in a double-supported state. It is formed into a hollow integrally formed product by blow molding so as to have a substantially loop shape when viewed from the left and right directions, and an inner rib extending from the mounting base toward the inside of the handrail portion inside the handrail body is formed It is characterized by having been done.

According to a second aspect of the present invention, there is provided a driving unit structure for a working machine in which a bonnet having a driving seat is disposed upright behind a floor step disposed at one of left and right ends of the body. A handrail body erected on the upper surface of the bonnet at the outer position in the lateral direction of the body of the seat is substantially looped in a left-right view in which a pipe-shaped handrail portion protrudes from the mounting base supported on the bonnet upper surface in a two-sided state. In addition to being formed into a hollow integrally formed product by blow molding so as to have a shape, an inner rib extending from one end side to the other end side of the handrail portion is formed inside the handrail portion. And

[Operation] According to the first and second aspects,
Because the handrail body is a hollow body made of an integrally molded product by blow molding, it has higher strength than, for example, a two-part structure such as a combination of two resin parts having a U-shaped cross section. This makes it easy to provide a necessary strength while using a resin material which is disadvantageous in material strength as compared with a metal material. Therefore, the handrail body can be configured to be lightweight, and there are no welding points or connecting points by screws, and it is possible to freely present a complicated shape such as a three-dimensional curved surface.

According to the first aspect of the present invention, since the inner rib extending from the mounting base toward the inner side of the handrail portion is formed inside the handrail body, the base which is the support side of the pipe-shaped handrail portion which is easy to grasp. The side (the mounting base side) can be reinforced, and the handrail can have appropriate strength. Further, the inner rib is formed inside the handrail body and cannot be seen from the outside, which is advantageous in that it does not cause a deterioration in appearance.

According to the second aspect of the present invention, since an inner rib extending from one end to the other end of the handrail is formed inside the handrail, a pipe having a relatively long length is formed. The bending strength and rigidity of the handrail portion can be increased, and a firm handrail portion can be obtained in such a manner that the handrail can be gripped without feeling unreliable.

[Effects] In the operating part structure of the working machine according to the first and second aspects, the required standing support strength,
In addition, it is possible to reduce the weight and cost while having the strength in the lateral direction, and it is possible to construct a handrail body which is advantageous in terms of design in which a complicated shape such as a three-dimensional curved surface can be freely designed. In addition, claim 1
In the handrail body, the support strength of the handrail portion is mainly improved, and the handrail body according to claim 2 has an advantage that the rigidity of the handrail portion itself is mainly increased.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 14 shows an overall side view of the combine A, in which a mowing part C is provided in front of the operating part B, a threshing part D and a Glen tank F are provided in the rear, and a crawler-type traveling device G is provided in a lower part. I have.

As shown in FIGS. 1 to 6, the driving part of the combine A has a driver seat 1 disposed on an upper surface 2d of a bonnet 2 having an engine E therein.
A rear surface 2a of the bonnet 2 is formed on the fuselage side, and the remaining front surface 2b, outer surface 2c, and upper surface 2d constitute a bonnet 2 that swings outwardly around the longitudinal axis P1 below the outer surface 2c. I have. An engine room 3 is formed in the hood 2.

A driving unit 4 provided in the engine room 3 has a radiator 5 disposed outside the fuselage, an engine E disposed inside the fuselage, and an output pulley group located inside the engine E inside the fuselage. As shown in FIG. 3, the outer surface 2c of the bonnet 2 in a state in which the driving unit 4 is closed has a ventilation window 6 with a dustproof net 6A as shown in FIG.
A perforated baffle plate 8 for equalizing the pressure distribution of the intake air of the radiator fan 7 is provided so that outside air can be taken into the air introduction window 5A of the radiator 5, and a front wall 2a of the bonnet 2 has a dustproof net 9A. Is provided so that outside air can be taken into the air introduction window 5A of the radiator 5 via the passage 9B in the front wall and the perforated baffle plate 8.

As shown in FIGS. 4 and 5, the lower side of the outer surface 2c of the bonnet 2 is pivotally supported around a longitudinal axis P1, and one end 10a is integrally attached to the bonnet 2. The stay 10 is rotatably supported by the lateral outer wall 20 and the other end 10b is supported by a stay 10 via a long guide hole 11 formed on the side of the fuselage. , And further restricts further rotation in a state of being laid down at a predetermined angle.

[0015] Therefore, from the closed state of the hood 2 which is configured to be swingable as shown in FIG. 4, the hood 2 is manually rotated to the outside of the fuselage as shown in FIG. Can be opened. When the hood 2 is open, as shown in FIG.
The area around the engine E and the area around the radiator 5 are exposed to the outside, and the rear side surface 2 of the hood 2 in an inverted state.
Since e is open, the engine E and the radiator 5 can be repaired and maintained through this open portion. Although not shown, the bonnet 2 that is swingable with respect to the machine body cannot be always swingably opened and closed without permission via a lock mechanism.

Further, as shown in FIG.
Is rotated around the longitudinal axis P2 to the right side of the fuselage,
When the rear part is opened, the rear wall of the hood 2 on the fuselage side is exposed. As shown in FIG. 6, the rear surface 2a has a central rear wall portion 2aa detachably attached thereto via bolts or the like. When the rear wall portion 2aa is detached from the body, the engine E Can be exposed, and the exposed portion can be repaired or maintained. Here, in the figure, 30 is
An air cleaner is provided behind the driver's seat 1, and 31 is a muffler.

Next, the structure of the driving section will be described. As shown in FIGS. 1, 4 and 13, the outer surface 2 of the bonnet 2
A ventilation window 6 provided with the dustproof net 6A is provided from the center to the lower part of c, and a lateral outer wall 20 having a handrail body 21 formed on the upper part is connected thereto.

As shown in FIG. 7, the handrail body 21 has a form in which a central portion is hollowed out and a curved upper surface portion 21A becomes a gripping portion, and is formed hollow by blow molding of a resin material. At the same time, a part of the handrail body 21 bulges in a hollow shape toward the inside of the fuselage, and the switch mounting portion 2
An operation box unit 14 including the control box 2 is configured.

As shown in FIG. 7 to FIG.
Is formed by blow molding so that a pipe-shaped handrail portion 13 projects from the mounting base 12 supported by the bonnet upper surface 2d in a double-supported state and has a substantially loop shape hollowed out in the left-right direction. It is configured as an integrally formed product. The mounting base 12 is placed on the upper surface 2d in a state having an operation box portion 14 that protrudes to the left and a vertical bar portion 15 that stands up on the rear side.

Inside the handrail body 21, upper and lower inner ribs 16 and 17 extending from the mounting base 12 toward the inside of the handrail portion 13 are formed, and inside the handrail portion 13, one end of the handrail portion 13 is provided. A long lateral inner rib 18 extending from the side toward the other end is formed. All three inner ribs 16 to 18 are left-rightward ribs connecting the left and right surfaces, and are provided with cutouts 19 for ensuring the flow of air during blow molding.

The upper and lower inner ribs 16 and 17 are set so as to pass in the vicinity of a mounting portion 21F, which will be described later, for bolting, and effectively increase the support strength of the double-supported handrail portion 13 having a long mounting span. It is designed to be enhanced.
The lateral ribs 18 increase the rigidity of the handrail portion 13 itself, so that a firm feeling (rigidity) can be obtained when the weight is applied and gripped.

As shown in FIG. 8, the operation box 14
Is formed so as to protrude toward the driver seat 1 side (left side) of the mounting base 12.
The key switch 2 is attached to the front step surface 22a which is the lower side of the upper surface.
3 and the like, and the rear step surface 22b which is the upper side of the upper surface
Is provided with a horn switch 24, and the operator sitting in the driver's seat 1 can use the switches 23, 24 with his right hand.
You can operate the kind.

As shown in FIGS. 7 and 11, a large number of hooking recesses 21d are continuously formed over a predetermined length in an inner corner portion of the handrail portion 13 of the handrail body 21. Is formed so as not to slip by forming a handhold grasped by the user. Also, the lateral outer surface 22 of the operation box portion 14
9A, each switch 23, as shown in FIG.
A wiring insertion window 22E for inserting the 24 wirings is formed with an opening. The opening edge of the wiring insertion window 22E is bent to form a stepped flange 22F, so that the wiring insertion window 22E is reinforced.

The vertical rail 15 of the handrail body 21 is provided with a plurality of concave mounting portions 21F with respect to the upper portion of the lateral outer wall 20 of the engine room 3, and is configured to be freely attachable to the upper portion of the lateral outer wall 20 via bolts. . At the time of blow molding, the mounting portion 21F has a concave surface on the opposite surface, leaving a bolt seat 21f on the side corresponding to the lateral outside. Also, lateral outer wall 2
As shown in FIG. 12, a plurality of chamfers 21G having a predetermined length are formed on corner portions of the handrail body 21 corresponding to 0 and hidden and invisible when connected to the lateral outer wall. A device has been devised to increase the overall rigidity.

On the bottom surface 21H of the handrail body 21 which comes into contact with the upper surface 2d of the bonnet 2, a pair of escape recesses 21K, 21K for the mounting member 25 between the upper surface 2d and the lateral outer wall 20 are provided.
Are formed. Then, as shown in FIG. 12, at a plurality of corner corner portions of the bottom surface 21 </ b> H of the handrail body 21,
When the drain hole 21L is perforated and dew condensation occurs due to a temperature difference between the outside air and the inside of the handrail body, the dew water flows out to the outside through the drain hole 21L.

[Alternative Embodiment] As shown in FIG. 13, in the handrail body 21, the upper inner rib 16 is formed in such a state that the upper inner rib 16 is horizontal and horizontal, and the end thereof is not connected to any of the upper and lower wall surfaces of the handrail portion 13. You may. Further, the horizontal inner rib 18 may be omitted.

In the above embodiment, the example in which the driving unit structure of the working vehicle of the present invention is applied to the combine has been described.
The present invention is not limited to this, and may be applied to a driving unit structure in a working vehicle such as a transport vehicle, a carrot harvester, a radish harvester, or the like.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of an operation unit according to an embodiment of the present invention.

FIG. 2 is a plan view of a main part in a state where an engine hood is turned down.

FIG. 3 is a plan view of a main part of the fuselage showing a driving part with an engine hood cut away.

FIG. 4 is a longitudinal sectional view showing the driving unit with a cutout.

FIG. 5 is a vertical cross-sectional view of a driving unit in which an engine hood is turned over.

FIG. 6 is a longitudinal sectional view showing the driving unit from the rear side with the engine bonnet turned over.

FIG. 7 is an exploded perspective view showing a relationship between a lateral outer wall and a handrail body.

FIG. 8 is a perspective view of a main part in a state where a handrail body is attached to a lateral outer wall.

FIG. 9 is a sectional view of a handrail body.

FIG. 10 is a sectional view of a hook portion of a handrail body.

FIG. 11 is a rear view of the handrail body viewed from the switch box side.

FIG. 12 is a perspective view of the handrail body viewed from the bottom side.

FIG. 13 is a side view of a handrail body showing another structure of the inner rib.

FIG. 14 is an overall side view of the combine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Driver's seat 2 Bonnet 2d Upper surface 3 Floor step 12 Mounting base 13 Handrail portion 16, 17, 18 Inner rib 21 Handrail body

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hiroshi Ogata 64 Ishizukitamachi, Sakai City, Osaka Prefecture F-term in Kubota Sakai Works (reference) 2B074 AA01 AB01 AC02 BA08 BA15 CD08 DA02 DC01 DE03 DE06 GH02 2B076 AA03 BA03 BC09 CD01

Claims (2)

[Claims] 1. An operating part structure of a working machine in which a bonnet having an operating seat disposed thereon is provided upright behind a floor step disposed on one of the left and right ends of an airframe. A handrail body erected on the upper surface of the hood at an outer position in the lateral direction of the machine body is substantially looped in a left-right direction in which a pipe-shaped handrail portion projects from a mounting base supported on the upper surface of the bonnet in a two-sided state. A working machine having a hollow integrally formed product formed by blow molding so as to have a shape, and an inner rib extending from the mounting base toward the inside of the handrail portion inside the handrail body. Driving unit structure. 2. A working unit structure of a working machine, wherein a hood having a driving seat disposed thereon is provided upright behind a floor step disposed on one of the left and right ends of the body. A handrail body erected on the upper surface of the hood at an outer position in the lateral direction of the machine body is substantially looped in a left-right direction in which a pipe-shaped handrail portion projects from a mounting base supported on the upper surface of the bonnet in a two-sided state. A working machine that is formed into a hollow integrally formed product by blow molding so as to have a shape, and that inside the handrail portion, an inner rib extending from one end side to the other end side of the handrail portion is formed. Driving unit structure.