JPS5945219A - Engine vibration-proof device for agricultural tractor - Google Patents

Abstract

PURPOSE:To suppress the inertia moving force of an engine section when a car starts and stops quickly by installing the engine section on a front axle bracket through a rubber vibration insulator so that a line connecting the front and rear rubber vibration insulators can pass through the vicinity of almost the center of gravity of the engine section. CONSTITUTION:When an engine section E is supported on a front axle bracket 1 consisting of left and right brackets 1L and 1R through the front and rear vibration insulators 9L, 9R, and 7, the bracket 17 of the rubber vibration insulator 9R is secured inside the right bracket 1R. On the other hand, the bracket 18 of the rubber vibration insulator 9L is secured outside the left bracket 1L and thus the center of the engine section E is shifted left. In addition, the rear rubber vibration insulator 7 uses a single ''?''-shaped insulator viewed from the side at the center and is supported on the bracket 1 through a gate-type bracket 22. In this case, the height of the rubber vibration insulator 7 is especially set so that a line connecting the front vibration insulator 9 to the rear of the same 7 can pass through the vicinity of the center of gravity of the engine section.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single engine structure for an agricultural tractor.

In conventional agricultural tractors, the engine was used as part of the body support member, so the engine vibration was felt in every part of the machine, and the engine vibration was also transmitted to the seat, bonnet, steering wheel, and even the work equipment. That was what was being conveyed.

That is, in the past, a clutch housing made of material was fixed to the rear of the engine, a transmission case was fixed to the rear of the clutch housing, and a rear axle housing sink was fixed to the rear of the transmission case. , these engines,
The clutch housing, transmission case, and rear axle housing are integrated into a body supporting member, and the front axle bracket, Fender, 1yii
It was equipped with wheels, 11m in the rear, etc.

With such a configuration, the vibrations of the engine are inevitably transmitted to all parts of the machine body, so it is difficult to eliminate this vibration, which is why frame-type agricultural tractors were constructed.

Frame-type agricultural tractors do not use the engine as a body support member, but instead use a body frame as a body support member, on which the engine is floated via vibration-proof rubber or the like.

The fuselage frame may extend from the front end to the rear end of the fuselage, or the fuselage frame may include only the front axle bracket portion integrated with the mission case.

When the engine is mounted on the aircraft frame or front axle bracket in this way, if anti-vibration rubber is installed, the anti-vibration rubber will be Or 1E always perform 1 vibration absorption, but
When the engine moves back and forth, for example when a Toyokawa tractor suddenly stops or starts, the anti-vibration head will deform and the effect will be lost, or the radiator fan in the radiator shroud will deform. This can damage the fan or affect the clutch facing inside the clutch housing, which is integrally installed with the engine, resulting in unexpected loss of power or power cut-off.

The present invention attempts to effectively solve the problem of not being able to stop the liquid level in the longitudinal direction of the engine by interposing a vibration isolating rubber.

In other words, in the past, the bottom mounting surface of the engine was fixed with bolts to the front axle bracket, etc., so even if the engine tried to move forward or backward, it was impossible, so there was no need for L7 for this. It is.

On the other hand, if the engine is mounted in a floating position via a vibration isolator, the engine can be moved forward, backward, left and right by stretching the rubber.

The inertia force that tries to lower the liquid level is applied to the center of gravity of the engine, and the further away from the center of gravity the engine is supported, the greater the inertia force that causes the engine to create a bending moment that tries to pull the anti-vibration rubber. .

In the present invention, in consideration of this point, the front and rear vibration isolators are arranged near the center of gravity of the engine, that is, on a line passing through the center of gravity, and the vibration isolators reduce the longitudinal movement force at the point where the inertial force applied to the center of gravity is the smallest. It's something you try to absorb.

The object of the present invention is as described above, and the detailed structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings. FIG. 1 is a side view showing the engine support part of an agricultural tractor. , FIG. 2 is a front view, and FIG. 3 is a plan view.

(1) is a front axle bracket that wraps around the fuselage frame, and serves as a chassis that supports the fuselage. Front axle racket (1)
The radiator flaket 2), center pin frame (111, drag arm bracket (Ill, steering gap bracket L-&]), etc. are fixed to the left and right brackets L-(1r,) (IR) of the .Center pin α (2) to center pin bracket (1])
The front axle α1 is supported through ((), and f3iJ wheels (3L), (
3R). Drag arm bracket (1
A reinforcing plate (131) is applied to 01 from the center lower side, and the drag arm (41 thread (12a) of 121) is pivotally supported on these.The drag rod is attached to the pitman arm (E) of the steering gear box (4). When (6) is pulled, the drag arm θ2 rotates around Itl+ (12), and the left and right knuck lures, !-(2(lL)(2OR) Rotate to perform steering.Front axle bracket (IL)
Buffer rubber (8L) (8R) is interposed to prevent the drag rod (6) from being lifted up and damaged when a rotary shaft, etc., is mid-mounted on the lower surface of the (IR).

In the present invention, the clutch housing (5) is fixed to the engine (possibly) and is integrated with vibration-proof rubber ('9L) (9R) (7
Since it is supported at three points (1), the integrated engine (El and clutch housing (5)) is collectively referred to as the engine section.

A power transmission shaft with a universal joint interposed therein protrudes from the clutch housing (5) toward the rear transmission case, and this power transmission (sleeve and steering handle tube do not meet (I7)) The center of the engine is slightly shifted to the left in the direction of travel.Furthermore, the transmission case input (lung) is also shifted to the left, so the power transmission 11III does not engage with the steering handle tube (4a). be.

The anti-vibration rubber (9R) bracket Q7) is bolted to the corner of the front axle bracket (IR) (IIIG) and the drag arm bracket (10).
Ru. It is fixed to the outside of the anti-vibration rubber (9L) bracket (1 drawer, front axle racket (], L).

As a result, the center of the engine (■ri) is shifted to the left 1' rule. This left and right li no if tatsu com (9L
) (9R) are arranged in a figure-eight shape toward the center of the engine cylinder head, and are fixed to the engine (El) via engine-side brackets (16L) and (16,R).

The line connecting the anti-vibration rubber (9L) (9R) is also placed slightly lower, closer to 1° center (G) when viewed from the front, making it easier to commute.

In addition, conventionally two rear vibration isolators were used on the left and right sides, but in the present invention, a vibration isolator rubber in the shape of an ``8'' on the side surface is installed in the center.
) is supported by one piece.

The bracket (a) of the anti-vibration rubber (7) is fixed in a gate shape on the brackets (23L) (28R) that protrude from the front axle brackets (IL) (IR).
The anti-vibration rubber (7) is placed on this second part, and the -1-
The hanging bracket (24) protruding from the clutch housing to one side is fixed on the two-face plate 1251,
It is suspended.

In this way, the clutch housing (5) of the engine part
In this case, the position of the 1vi swinging rubber (7) could be raised by suspending it.

In the side view of FIG. 1, the line connecting the front anti-vibration comb (9) and the rear anti-vibration rubber (7) passes near the center of gravity (Gl).

In this way, the configurations 1 to 1 are such that the center of gravity is located near the triangle connecting the points of the three anti-vibration rubbers (9L, 9R, and 7).

As described above, the present invention relates to a front axle bracket [
When mounting the engine section on the 11J-, a vibration isolating comb is interposed and supported on the floating shape Ib, and the line connecting the front vibration isolating rubber and the rear vibration isolating rubber is approximately near the center of gravity of the engine section. Since the engine is positioned so that it passes through, it not only prevents the vibration of the engine from being transmitted to the tractor body, but also absorbs the inertial movement force of the engine part that occurs when the tractor suddenly stops or starts. The engine may protrude forward and damage the radiator fan, or move backwards and cause damage to the main clutch device, power transmission shaft, etc.
There is no longer any need to apply unexpected forces to the mission case.

[Brief explanation of drawings]

FIG. 1 is a side view showing an engine support portion of an agricultural tractor, FIG. 2 is a front view, and FIG. 3 is a plan view. (IL) (IR)...Front axle bracket (E
l...Engine, (Gl...Mountain of engines,
(5)...Clutch housing, (7)...Rear anti-vibration rubber, (9L) (9R)...Front vibrating rubber. li! Kenrj person Yanmar TSEL Co., Ltd. agent
Patent Law Arrow 1i! Tonneau T-section

Claims (1)

[Claims] When placing the engine part on the front axle racket, a vibration isolating rubber is interposed to support it in a floating state, and the line connecting the front vibration isolating rubber and the rear anti-vibration rubber is approximately the center of the engine. 1. An engine vibration isolating device for an agricultural tractor, characterized in that the engine vibration isolating device is arranged so as to pass through a small center f'I of a part.