JPH1134924A - Car body structure for tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a car body structure for a tractor, which can quickly and simply remove dust and the like remained in a cooling air introducing duct to an engine room. SOLUTION: A pole frame 8 is erected out of a car body frame at the rear side area of an engine room, concurrently, a handle supporting frame 9 is projected afterward out of the upper part of the pole frame 8, let an entirely hydraulic type power steering unit 11 directly equipped with a steering handle 10, be supported by the handle supporting frame 9, a space for setting a battery 14 is formed between the handle supporting frame 9 and a car body frame 3, a cover member 15 packaged in such a way that this space is enclosed, is so constituted as to be freely mounted/demounted, and an intake port 16 for taking in outside air for cooling an engine, is provided for the cover member 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body structure of a tractor provided with a riding operation section at a rear portion of an engine room.

[0002]

2. Description of the Related Art Conventionally, in this type of tractor body structure, a steering shaft of a steering handle is
The power steering unit is configured to be mounted on a handle shaft extending forward and downward while being supported by the handle post, and extending to near the body frame. In order to introduce the outside air for cooling into the engine room from the step portion of the operation unit with as little floating dust as possible, an outside air inlet is formed on the rear side of the handle post.

[0003]

However, the above-described conventional tractor body structure requires a maintenance work for removing dust and the like accumulated between a radiator in an engine room and an outside air inlet of a handle post. In addition, there is a problem that the work is difficult because the handle shaft and the hydraulic piping of the power steering unit are in the way.

The present invention has been made in view of the above circumstances, and provides a vehicle body structure of a tractor capable of easily and quickly removing dust or the like staying in a cooling air introduction passage to an engine room. Aim.

[0005]

[Means for Solving the Problems]

(Structure) In the vehicle body structure of the tractor according to the first aspect of the present invention, a support frame is erected from a body frame at a rear portion of an engine room, and a handle support frame is projected rearward on an upper portion of the support frame. And a fully hydraulic power steering unit directly equipped with a steering handle is supported by the handle support frame, and a space for installing a battery is formed between the handle support frame and the body frame. A cover member provided so as to surround the space is detachably configured, and the cover member is provided with a dust-proof intake port for taking in outside air for engine cooling.

According to the first aspect of the present invention, if the cover member is removed and the space between the handle support frame and the body frame is opened, the space portion has a battery. Is provided, and the handle shaft, the power steering unit, and the like are located above the space and do not obstruct the work, so that maintenance work such as cleaning can be performed relatively easily and quickly.

(Effects) Therefore, according to the configuration of the first aspect of the present invention, maintenance work can be performed easily and quickly, so that workability can be improved.

(Structure) The vehicle body structure of a tractor according to a second aspect of the present invention is the tractor according to the first aspect, wherein a second intake port for introducing outside air is provided below the space in which the battery is disposed in a dustproof state. It is characterized by being provided.

(Operation) According to the configuration of the second aspect of the present invention, the second intake port for introducing outside air is provided in a dust-proof state below the space in which the battery is arranged, so that it is provided on the cover member. By two of the intake port and this second intake port,
The intake area for introducing the outside air can be configured to be large, so that the flow rate of the outside air to be sucked is reduced so that the adhesion of dust to the dustproof structure can be suppressed.

(Effects) Therefore, according to the configuration of the second aspect of the present invention, since the adhesion of dust to the dustproof structure can be suppressed, clogging due to the adhesion of dust to the dustproof structure for a relatively long period of time. There is an advantage that generation is suppressed and the number of operations for removing dust attached to the dustproof structure can be reduced.

(Structure) According to a third aspect of the present invention, there is provided a vehicle body structure for a tractor according to the first aspect, wherein the support frame is formed by a hollow member having a U-shaped cross section and extending in the shape of an arch extending right and left of the body frame. And
The hydraulic piping of the power steering unit is housed and arranged along a hollow portion of the support frame.

(Operation) According to the configuration of the third aspect of the present invention, the support frame is constituted by a hollow member having a U-shaped cross section and formed in an arch shape extending over the left and right sides of the body frame, and Since the hydraulic piping is housed and disposed along the hollow portion of the support frame, the hydraulic piping of the power steering unit is removed from the passage of the cooling air to the engine room, and the hydraulic piping is used for maintenance. The hydraulic piping is protected by being surrounded by the support frame.

(Effects) Therefore, according to the configuration of the third aspect of the present invention, the hydraulic piping of the power steering unit does not hinder the maintenance, so that the work becomes easy, and the hydraulic piping is protected by the support frame. This increases durability.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a garden tractor for lawn mowing. This garden tractor has a prime mover 4 at the front of a body frame 3 supported by a pair of left and right front wheels 1, 1 and rear wheels 2, 2, a riding operation unit 5 at an intermediate part, and a transmission case 6 at a rear part. A mower 7 driven by transmission from a transmission case 6 is mounted on the lower abdomen of the vehicle body so as to be suspended and supported.

As shown in FIGS. 1 to 3, an arch-shaped support frame is provided between the boarding operation unit 5 and the driving unit 4 so as to extend over a pair of left and right body frames 3 along the front-rear direction. 8 stands. A handle supporting frame 9 is connected to an upper portion of the support frame 8 so as to protrude rearward. The handle supporting frame 9 fixedly supports an all-hydraulic power steering unit 11 to which a steering handle 10 is directly connected.

A space S between the lower edge of the handle support frame 9 and the body frame 3 is set as a battery placement space, and serves as a battery mounting member attached to the body frame 3. Left and right stay 1
A battery 14 is mounted and supported on a battery mounting table 13 supported by the batteries 2 and 12. A cover 15 for closing the space S is detachably mounted on the handle support frame 9 and the support frame 8. That is, as shown in FIG. 3, the cover 15 is made of a synthetic resin and is formed of a frame formed in a U-shape in plan view. An intake port 16 for introducing outside air as wind is provided so as to open to the boarding operation unit 5 side, and a dustproof net 17 is provided on the intake port 16. Further, a second dust-proof net 18 is stretched between lower edges of the cover 15, and a second air inlet 19 is provided to open downward. The cooling air to the engine room R can be introduced from between the body frames 3 through the second dustproof net 18. On the front side of the support frame 9, a radiator 20, an engine 2
A driving unit 4 is formed by arranging the driving unit 1 and the like.
2 are provided.

With this configuration, the cooling air to the engine 21 is introduced from between the left and right lower edges of the intake port 16 and the cover 15 on which the second dustproof net 18 is stretched. Therefore, since the opening area at the introduction portion of the introduced cooling air is made large, the flow velocity at the cooling air introduction portion is low, and therefore, the airflow to the dustproof net 17 and the second dustproof net 18 is reduced. Dust adhesion can be reduced.

As shown in FIG. 4, the support frame 8 is formed by bending a hollow member having a U-shaped cross section, and the hydraulic pipe P of the power steering unit 11 is introduced from above. Thus, it is disposed along the inside of the hollow member. Also, two protrusions 15a are provided on the front edges of the right and left sides of the cover 15 so as to project forward.
Are inserted into a pair of upper and lower slits 23 formed on the rear surfaces of the left and right support portions 8L, 8R of the support frame 8. In this state, the cover 15 is fixed by fastening a hand-held bolt 25 to a nut on the handle supporting frame 9 side through a hole 24 at the upper end of the rear surface of the cover 15 in this state. With this configuration, when removing dust remaining at a location between the radiator 20 and the battery 14 or replacing the battery 14, the bolt 25 is simply released and the cover 15 is removed.
The space S can be opened by a simple operation of simply removing the space S.

Next, the arrangement of the tension pulley 29 of the belt-type transmission mechanism 26 for transmitting power to the transmission case 6 will be briefly described. As shown in FIG.
A driven pulley 27 of a belt-type transmission mechanism 26 for transmitting power from the engine 21 to the input shaft 6a of the transmission case 6 is provided. A tension pulley 2 for increasing the tension of a belt 28 of the belt type transmission mechanism 26
As shown in FIG. 5 and FIG. 6, a bar 9 is supported on a pulley support 30 formed by bending a bar so as to freely rotate. The pulley support 30 is inserted through a lateral hole 33 formed in the body frame 3 and the pulley support 3
0 is elastically pulled outward, and tension pulley 2
The compression coil spring 35 is interposed between the body frame 3 and the nut 34 screwed and fixed to the outer end of the pulley support 30 so as to apply tension to the belt 28 at 9. With this structure, there is an advantage that the belt-type transmission mechanism can be disposed in a narrower space than the structure using the swing-type tension arm, and the structure can be made compact.

Next, the structure of the mounting position of the rear wheel 2 to the axle 36 will be briefly described. As shown in FIGS. 5 to 7, the cylindrical boss portion 38A of the wheel hub 38 fastened to the wheel 2A of the rear wheel 2 with a bolt 37 ° is attached to the axle case 31.
It is externally fitted to the axle 36 projecting more outward so as to rotate integrally. Then, the cylindrical boss portion 38A of the wheel hub 38
To the oil seal 39 provided at the end of the axle case 31.
A ring-shaped stopper 41 is fitted into the annular groove 40 on the inner peripheral surface at the outer end of the cylindrical boss portion 38A in order to restrict the movement in the left-right direction so as not to come into contact with the cylindrical boss portion 38A. In a state where the stopper 41 is pressed inward by the collar 42, the locking nut 4 is attached to the screw portion 36 a at the end of the axle 36.
3 is screwed and fastened. Thus, the axle 36 can be configured to have a stepped structure and be configured at a lower cost than the one that restricts the movement of the wheel hub 38 to the inside.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a lawn mowing tractor.

FIG. 2 is a longitudinal sectional side view showing a main part.

FIG. 3 is an exploded perspective view showing a main part.

FIG. 4 is a cross-sectional plan view showing a support frame.

FIG. 5 is a partially cutaway front view showing a structure of an input unit to a mission case.

FIG. 6 is a cross-sectional plan view showing a belt tension applying unit.

FIG. 7 is a cross-sectional view showing a state in which the wheel hub is mounted on the axle before the stopper is mounted (a) and a state in which the axle hub is fixed to the axle (b).

[Explanation of symbols]

 Reference Signs List 3 body frame 8 support frame 9 handle support frame 10 steering handle 11 power steering unit 12 battery mounting device 14 battery 15 cover member 19 second intake port P hydraulic piping R engine room

Claims (3)

[Claims] 1. An all-hydraulic type having a support frame standing upright from an airframe at a rear portion of an engine room, a handle support frame protruding rearward above the support frame, and a steering handle directly mounted. The power steering unit is supported on the handle support frame, a space for installing a battery is formed between the handle support frame and the body frame, and a cover member provided to surround the space is detachably attached. The vehicle body structure of the tractor, wherein the cover member is provided with a dust-proof intake port for taking in outside air for cooling the engine. 2. A second air intake port for introducing outside air in a dustproof state below the space in which the battery is disposed.
Body structure of the tractor described. 3. The support frame is constituted by a hollow member having a U-shaped cross section and formed in an arch shape extending right and left of the body frame, and a hydraulic pipe of the power steering unit is accommodated along a hollow portion of the support frame. The tractor body structure according to claim 1, which is disposed.