JPH10203416A - Bonnet support structure of tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly position a bonnet by fixing each longitudinal frame part of a portal support frame to an upper surface of a body housing through a reinforcement plate to connect the longitudinal frame parts to each other, and fixing a lower end of the longitudinal frame parts of the portal support frame to each body housing side. SOLUTION: A support part 19c at a lower end of longitudinal frame parts 19a, 19a of a portal support frame 19 are fixed to right and left sides of a clutch housing part 9 through a stay 42, and the longitudinal frame parts 19a, 19a of the portal support frame 19 are reinforced by horizontally providing a reinforcement plate 39. In addition, right and left approximately middle parts of the reinforcement plate 39 are fixed to a bracket 15 to reinforce a joined part of a clutch housing part 9 with a drive housing part 10 through a connection stay 36, and fixed to an upper surface of the clutch housing part 9 through a stay 38. The portal support frame 19 is fixed on the body housing in a firmly and rearwardly inclined condition while correctly positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for arranging a gate-shaped support frame for supporting a rear portion of a hood of a tractor at a rearward inclination, and easily positioning and firmly fixing the support frame.

[0002]

2. Description of the Related Art Conventionally, a portal-type support frame for supporting a rear portion of a hood covering an engine or a radiator of a tractor, and a front portion of a dashboard on which a handle and an instrument panel are disposed is erected on an airframe housing. Techniques are known. For example, the technique disclosed in Japanese Utility Model Publication No. 59-21992.

[0003]

In the above prior art, the portal support frame is vertically erected, and the lower end of the portal support frame is fixed on the body housing.
The strength of the upper part of the support frame is low and weak against the force acting from the front and rear. In addition, in order to improve the style from the design point, the upper part of the portal-type support frame is inclined rearward to be erected backward, but the rear of the bonnet and the front of the support frame are inclined. If the angles do not match, a gap is formed and the aesthetic appearance is impaired, so that an accurate positioning configuration has been desired.

[0004]

Means for Solving the Problems The present invention is configured as follows to solve the above-mentioned problems. That is, in a tractor in which a gate-type support frame for supporting a bonnet is disposed in a rearwardly inclined state, each of the vertical frame portions of the gate-type support frame is fixed to the upper surface of the airframe housing via a reinforcing plate interconnecting each other. The lower ends of the vertical frame portions of the frames are respectively fixed to the side surfaces of the housing.

[0005]

Next, examples will be described. FIG. 1 is a side view of a tractor having a portal-type support frame mounting structure of the present invention, FIG. 2 is a side view, partly in section, of a portal-type support frame mounting portion, and FIG. 3 is an exploded perspective view of the portal type support frame. 4 is a side view of the step mounting portion, FIG. 5 is a plan view of the same, and FIG. 6 is a front sectional view of the same.

In FIG. 1, an engine E is mounted in a bonnet 2 on an engine frame 1 at a front portion of a tractor, and a rear portion of the bonnet 2 is disposed around a horizontal axis at a front portion of a gate-type support frame 19 described later. The dashboard 3 is fixed to the rear part of the gate-type support frame 19 so as to be freely swingable to open and close, and the handle 4 is mounted on the dashboard 3 with the tip of a handle shaft 4a protruding. The instrument panel is located at A seat 6 is disposed behind the handle 4, and a transmission case 7 containing a transmission is disposed below the seat 6. An input shaft of the transmission case 7 and an output shaft of the engine E are connected to a main clutch and a coupling. The main clutch is housed in a clutch housing part 9, the coupling shaft is housed in a drive housing part 10, and the clutch housing part 9 and the drive housing part 10 are integrally formed.
A body housing is formed, and the engine E and the transmission case 7 are connected to each other.

A pair of left and right front wheels 12 are supported below the engine frame 1 so as to be swingable about a horizontal axis.
The front wheels 12 are steered by a power steering cylinder 13 provided in a front axle case. Also,
A pair of left and right rear wheels 14 are supported on both sides of the transmission case 7 via a rear axle case, and the power from the engine E is shifted by a transmission in the transmission case 7 to drive the front wheels 12 and the rear wheels 14. And

As shown in FIGS. 4 and 5, a drive housing 1 between the dashboard 3 and the seat 6 is provided.
0 The upper surface is covered with a front cover 31 and a rear cover 32.
1 and the front end of the steps 11 and 11 is a stay 3
It is connected and fixed to stays 34 fixedly provided on the side of the clutch housing 9 via 3.33. The rear part of the step 11 is fixed to the fender 35 with bolts or the like. As shown in FIG. 6, the width of the front cover 31 is set to be larger than that of the drive housing 10, so that the drive housing 10 and the front cover 3
1, a space SS is formed, and a link L connected to a clutch pedal or a brake pedal is formed in the space SS.
And wires, wires, harnesses, etc. that connect the switches on the fenders 35, the sensors and transmission cases provided on the work equipment, and the controllers, instrument panels and levers in the dashboard 3 doing. Therefore, just by removing the front cover 31, the link L, the electric wire, the wire, the harness, and the like disposed on the side of the drive housing unit 10 are exposed, and the maintenance thereof can be facilitated.

As shown in FIGS. 2 and 3, a portal-type bracket 15 is disposed above the joint between the clutch housing portion 9 and the drive housing portion 10 so that the clutch housing portion 9 and the drive housing portion 9 are connected to each other. The joining portion between the drive housing portions 10 is strongly reinforced. The handle column 5 is fixedly supported on the upper surface of the bracket 15, and the handle shaft 4a in the handle column 5 projects from the upper surface of the dashboard 3, and the handle 4 is mounted. A steering unit 16 is fixed to the lower surface of the bracket 15, and the lower end of the handle shaft 4a is
6. In such a configuration, when the handle 4 is rotated, the hydraulic direction switching valve is switched by the steering unit 16, and pressure oil is supplied to the power steering cylinder 13 according to the rotation direction and the amount of rotation of the handle 4 and driven, The front wheels 12 can be steered.

As shown in FIGS. 2 and 3, a reinforcing plate 17 is provided laterally on the front of the bracket 15,
An L-shaped connecting stay 36 in side view is provided on the reinforcing plate 17.
Are fixed with bolts or the like, and the upper side of the mounting portion 37a of the hot-air prevention plate 37 and the reinforcing plate 39 are fixed together with bolts or the like on the front surface thereof. On the other hand, the left and right vertical frame portions 19a
-Shaped support frame 19 having a gate-like shape as viewed from the front with the horizontal frame portion 19b
Are disposed on the clutch housing portion 9 inclined backward, and the reinforcing plates 39 are provided inside the two vertical frame portions of the gate-shaped support frame 19.
Left and right ends of the reinforcing plate 39 are joined together, and an upper side of a mounting portion vertically suspended at a substantially right and left central portion of the reinforcing plate 39 is fixedly fastened to an upper side of the connecting stay 36 and an upper side of a mounting portion 37a of the hot air prevention plate 37,
The lower side of the mounting portion of the reinforcing plate 39 is fixed together with the lower side of the mounting portion 37a of the hot wind prevention plate 37 to a stay 38 fixed to the upper surface of the clutch housing portion 9 by bolts or the like. A fuel tank 40 is housed and fixed in a space defined by the inside of the gate-shaped support frame 19, the rear surface of the hot wind prevention plate 37, and the upper inner surface of the dashboard 3, and the hot wind prevention plate 37 is adjusted to the width of the rear portion of the bonnet 2. The engine E
From the hot air from entering the dashboard 3 side.

The vertical frame 19 of the gate-type support frame 19
a, the L-shaped stays 2a projecting rearward from the rear of the bonnet 2 are pivotally supported, and the bonnet 2 is pivotally connected to the pivot pins 41.4.
1 can be opened and closed. In addition, the portal support frame 19
The lower ends of both vertical frame portions 19a are bent inward to form the support portions 1a.
9c and 19c, and the support portions 19c and 19c
The clutch housing portion 9 is fixed to the engine connecting flange portion 9a via the interface 2 and 42.

In such a configuration, the portal support frame 19
The support portions 19c at the lower ends of the vertical frame portions 19a are fixed to the left and right side surfaces of the clutch housing portion 9 via stays 42, and the vertical frame portions 19a
Is reinforced by a reinforcing plate 39 provided laterally, and a substantially halfway portion of the reinforcing plate 39 at the left and right is a bracket for reinforcing a joint portion between the clutch housing portion 9 and the drive housing portion 10 via a connecting stay 36. 1
5 and fixed to the upper surface of the clutch housing portion 9 via the stay 38, and can be fixed on the body housing in a state where the portal-type support frame 19 is firmly tilted backward while accurately positioning. It is.

[0013]

As described above, the present invention has the following advantages. That is, the gate-type support frame can be firmly fixed to the body housing in an inclined state, and the gate-type support frame can be accurately fixed at a predetermined position. It can be assembled accurately without any gaps.

[Brief description of the drawings]

FIG. 1 is a side view of a tractor having a portal type support frame mounting structure according to the present invention.

FIG. 2 is a side view and a partial cross-sectional view of a mounting portion of a portal support frame.

FIG. 3 is an exploded perspective view of a portal support frame.

FIG. 4 is a side view of a step mounting portion.

FIG. 5 is a plan view of the same.

FIG. 6 is a front sectional view of the same.

[Explanation of symbols]

 2 Bonnet 3 Dashboard 9 Clutch housing part 10 Drive housing part 15 Bracket 19 Gate type support frame 19a Vertical frame part 39 Reinforcement plate

Claims (1)

[Claims] 1. A tractor in which a portal support frame for supporting a bonnet is disposed in a rearwardly inclined state, wherein each of the vertical frame portions of the portal support frame is fixed to an upper surface of an airframe housing via a reinforcing plate interconnecting each other; A hood support structure for a tractor, wherein the lower ends of the vertical frame portions of the portal-type support frame are fixed to the side of the housing of the fuselage.