JPS5914574A - Frame device for framed tractor - Google Patents

Abstract

PURPOSE:To enable to steer with a small redius of turning and reinforce the entire body of a frame, by a method wherein a notch is provided at a part of a rear part of each front wheel a part of which is engaged with the frame at the time of steering, and an intermediate frame having a central part recessed is fixed by welding from the inner side. CONSTITUTION:Since an inside rear part of a tire 10 of the front wheel 11 interferes with the frame 2, a trapezoidal cut part is provided on the rear side of a front part of the frame 2, and the intermediate frame 22 comprising a trapezoidal plate having a central part sunk and a lower part bent backward is provided inside the cut part. The intermediate frame 22 reinforces the frame 2 and protects an inside part. The frame 2 is supported at two points, namely, at a center pin supporting bracket 25 and a transmission case 5 provided at a rear part, so that a load is distributed (though not uniform) over the entire part of the frame 2. A bending moment diagram obtained from a load distribution curve is as shown.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a frame device for a frame type tractor.

The frame extends from the front end to the rear end of the tractor, and supports the engine, transmission case, etc. on the frame. However, because the engine and transmission case are mounted on the frame, the front frame becomes wider and the wheel distance becomes longer. Therefore, the turning radius becomes larger. If you try to shorten the wheel distance as much as possible, the rear tire of the front wheel will hit the frame during one rotation. As shown in Figure 9, if the left and right front wheels were turned by the same angle when attempting to turn, the left and right front wheels would turn around different centers. This makes it impossible to turn smoothly. Therefore, as shown in FIG. 10, if the center is the intersection of the extension of the rear axle and the perpendicular line of the left and right front wheels, the vehicle can turn smoothly. but,
In this way, the inner rear end of the front wheel will come into contact with the frame as shown in Figure 10.

Therefore, in the present invention, the entire frame (2) is cut into a trapezoid shape so that the tire does not hit the frame when rotating, and a concave intermediate frame is installed inside the cut portion, thereby reinforcing the entire frame. This is a frame device that also serves as protection for the body.

The present invention has one or more objects, and will be described in detail based on the configuration of the embodiment shown in the attached drawings. 〇 Figure 1 is a side view of the tractor Figure 2 shows only the frame taken out. Side view Figure 3 is a top view Figure 4A is a side view Figure 4B is a bending moment diagram of the frame Figure 5 is a front view of the frame Figure 6 is a side view of the intermediate frame Figure 7 is a top plan view 8 is a sectional view. FIG. 9 is a plan view when the left and right wheels are at the same angle. FIG. 10 is a plan view when the left and right wheels have different angles.

In conventional tractors, the engine, clutch housing, transmission case, and one-noise axle case were linearly united to form an integrated body support member. It was possible to reduce the weight by thinning the walls of the Clatchino 1 housing, transmission case, and rear axle case. Hence the engine and clutch housing.

The center part of the frame, which bears the load of the mission case, is the second
As shown in the figure, it has a large width (J2)'ir, the front part has a small load and the front axle rotates, so the vehicle height is high, so it is narrow (11), and the rear part is wide to avoid the rear axle housing. It is narrow (A'3). An engine (3) fixed to the central front part of the frame (2) by a vibration preventer (4), a radiator (8), a front PTO clutch 03, etc. are arranged in front of the engine (3) in the bonnet (1). The rear part has a mission case (5) and all left and right frames (2
) and place the seat (9) on top of the mission case (5).
Fully equipped. In the center is Clasochino Uzing (6)
There is a gearbox (8) and a bracket (7) supporting the gearbox. When you turn the steering wheel 09 once, the drag rod completes from the gear box (8) via the pitman arm C21) C6.
The pitman arm QD, which changes the angle of the front wheel 0υ with the knuckle arm, is attached to the dash board side cover (1119) and is protected by the shaft under the board side cover, reinforcing the frame (2). The step θη and clutch pedal a4 are attached to the outside of the frame (2) under the lower aΦ of the dash board side cover. The rear part is a frame (2)
Therefore, a trapezoidal cutting part is provided at the rear of the front part of the frame (2), and the center of the trapezoidal plate as shown in Figures 6, 7, and 8 is recessed inside the cutting part, and the lower part is cut out. The intermediate frame (2) which fixes the intermediate frame (2) bent backwards fully reinforces the frame (2) and protects the interior thereof.

As shown in Figure 2, the frame (2) is supported at two points: the center pin support bracket (c) at the front and the transmission case (5) at the rear, and the load is distributed over the entire frame in different sizes. The moment diagram of the load distribution curve 9 is shown in Figure 4B.

In particular, the width 'eu2) of the central part where the bending moment is large is large, and the width of the front part U (J
1), the rear part was made narrower as (13).

In addition, the rear wheel and front wheel support members, which are subject to moderate bending moments because they are the fulcrum of the load, are reinforced by fully fixing the rear wheel part to the transmission case (5), and the front part is reinforced by a center pin bracket and It is reinforced by providing an intermediate frame.

As described above, the present invention is achieved by (g) a frame extending from the front end of the lid to the rear end, and in a frame tractor in which an engine, a transmission case, etc. are mounted on the frame, when the rear of the front wheels touch the frame when turning the steering wheel; An intermediate frame with a full notch and a concave central part from the inside is welded to the engaging part, so the frame (2) is wide and stable as the engine and transmission case are placed on it. However, since the notch is provided, the turning angle of the front wheels during steering is large, making it possible to make small turns, and also making it possible to create a smooth transition from the narrow part of the frame to the wide part. It is.

[Brief explanation of the drawing]

Figure 1 is a side view of the tractor Figure 2 is a side view with only the frame taken out Figure 3 is a top view Figure 4A is a side view ff1E4B is a drawing showing the bending moment state of the frame Figure 5 is a front view of the frame Figure 6 is a side view of the intermediate frame Figure 7 is a bottom half view Figure 8 is a cross section (2) Figure 9 is a plan view when the left and right wheels are at the same angle Figure 10 is a cross section of the left and right wheels Plan view when using different n-square metals (2)... Frame (2a)... Notch (
c)...Intermediate frame applicant Yanmar Diesel Co., Ltd. agent Patent attorney Toshikazu Yano -429- -/'- Map of Mizukiyama 0

Claims (1)

[Claims] In a frame tractor in which the frame extends from the front end to the rear end of the tractor, and the engine, the engine case, etc. are all mounted on the frame, the part where the rear of the front wheels engages with the frame when turning the steering wheel. The notch part is completely configured,
An intermediate frame with a recessed central part is fixed by welding from the inside.All features and -j-le frame tractor frame device.