JPH0672157A - Engine mount structure for paddy field traveling working machine - Google Patents

Abstract

PURPOSE:To prevent contact between an engine frame and a collar so as to prevent the transmission of vibration and the generation of noise by disposing an elastic inclusion body between the collar through hole of the engine frame and the collar. CONSTITUTION:The fitting part 5A of an engine 5 is fitted to an engine frame 26 by a bolt 32 through vibration isolating bodies 28U, 28D brought into contact with the upper and lower faces of the engine frame 26 at the front part of a traveling body 4. A collar 33 for setting the minimum space between an upper and a lower contact plates 29U, 29D is fitted among the engine frame 26, the upper and lower vibration isolating bodies 28U, 28D and the bolt 32, and an elastic inclusion body 36 is disposed between the collar through hole 34 of the engine frame 26 and the collar 33. When the engine frame 26 and the collar 33 are going to come in contact with each other, this elastic inclusion body 36 prevents it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine mount structure for a paddy field traveling working machine such as a rice transplanter or a direct flooder.

[0002]

2. Description of the Related Art For example, in a paddy rice transplanter as a paddy traveling work machine, an engine is mounted on a front portion of a traveling vehicle body, and a vibration isolator is brought into contact with upper and lower surfaces of an engine frame at the front portion of the traveling vehicle body. The abutment plates are abutted so as to sandwich the upper and lower anti-vibration bodies, and bolts are passed through them and the engine mounting portion arranged on the upper abutment plate and fastened with nuts, and the collar is fitted to the collar. Has been done.

The output shaft of the engine is arranged in the shape of a horizontal shaft, and the power can be transmitted to the transmission shaft of the transmission case via the belt transmission.

[0004]

In recent years, it has been required to reduce the weight of this type of paddy traveling work machine in order to improve fuel efficiency. If the weight of the machine is reduced to meet the demand, the engine There is a problem that vibration and noise easily occur. In particular, when the output shaft of the engine and the transmission shaft of the transmission case are horizontal axes and a belt transmission is used, the output shaft and the transmission shaft may move in the front-back direction due to rotation fluctuations of the output shaft, load fluctuations, and belt expansion and contraction. The vibration is likely to be greater than that when facing directly to and connected directly.

Therefore, the shape of the vibration isolator between the engine frame of the traveling vehicle body and the backing plate has been devised to reduce the vibration, but the color for setting the minimum distance between the upper and lower backing plates is the engine. Noise may be generated due to the contact between the metal members and the frame. An object of the present invention is to provide an engine mount structure for a paddy traveling work machine in which an elastic interposition body is interposed between an engine frame and a collar to solve the above problems.

[0006]

The concrete means for solving the problem in the present invention is to contact the vibration isolator 28U, 28D with the upper and lower surfaces of the engine frame 26 at the front part of the traveling vehicle body 4,
The contact plate 29 is sandwiched between the upper and lower vibration isolator 28U and 28D.
U and 29D are brought into contact with each other, and bolts 32 are passed through and fastened to them and the engine mounting portion 5A arranged on the upper pad plate 29U.
Fit the collar 33 between the U and 28D and the bolt 32,
An engine mount structure for a paddy traveling work machine in which an output shaft 15 of the engine 5 is arranged in a horizontal axis so that power can be transmitted to a transmission shaft 18 of a transmission case 17 via a belt transmission device 16. The elastic interposition body is arranged between the collar through hole 34 and the collar 33.

[0007]

The mounting portion 5A of the engine 5 is mounted on the engine frame 26 with the bolts 32 via the vibration isolator 28U, 28D that is in contact with the upper and lower surfaces of the engine frame 26 at the front of the traveling vehicle body 4. A collar 33 that sets a minimum distance between the upper and lower contact plates 29U and 29D between the engine frame 26 and the upper and lower vibration isolator 28U and 28D and the bolt 32.
And an elastic interposition body is arranged between the collar through hole 34 and the collar 33 of the engine frame 26.

The output shaft 15 of the engine 5 is arranged in a horizontal axis, and a transmission case 17 is provided via a belt transmission 16.
When vibrations occur in the engine due to fluctuations in the rotation of the output shaft 15, fluctuations in load, expansion and contraction of the belt, etc., most of the vibrations are absorbed by the vibration isolator 28, and the engine frame is absorbed. When the 26 and the collar 33 are about to come into contact with each other, the elastic interposition prevents this.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 1 and 3, reference numeral 1 denotes a riding-type rice transplanter as a working implement for traveling in paddy fields, and an engine 5 is mounted on a front portion of a traveling vehicle body 4 equipped with front wheels 2 and rear wheels 3. A steering unit 8 including a steering handle 6 and a seat 7 is provided in the front and rear of the traveling vehicle body 4, and a seedling planting device 11 is provided behind the steering unit 8 via an elevator cylinder 9 and an elevator link mechanism 10.
Is connected so that it can move up and down. Reference numeral 12 denotes a hood that covers the engine 5.

The power of the output shaft 15 of the engine 5 is transmitted to a transmission shaft 18 serving as an input shaft of the mission case 17 via a multi-stage belt transmission device 16 as an auxiliary transmission device. It is transmitted to the front wheels 2 and the rear wheels 3 via a transmission such as a main transmission, and also transmitted to the seedling planting device 11 and the like. The multi-stage belt transmission device 16 shows a double tension system, and the output shaft 15 of the engine 5 and the transmission shaft 18 of the transmission case 7 are both horizontal horizontal shafts, and two sets of pulleys 20L, 20H, 21L are provided. , 21H are provided, the belts 22L, 22H are wound around the pulleys 20L, 20H, 21L, 21H of the respective shafts, and the belts 22L,
Tension pulleys 23L and 23H can be pressed against 22H.

In the first embodiment shown in FIGS. 1 to 4, a support base 25 is fixed to the front portion of the transmission case 17 by bolts, and the support base 25 has a flat engine frame 2.
The engine 5 is mounted on the engine 6 via mount mechanisms 27F and 27R. Each of the mount mechanisms 27 includes a pair of front and rear anti-vibration bodies 28 that come into contact with the upper and lower surfaces of the engine frame 26.
U and 28D, the contact plates 29U and 29D that are in contact with each other so as to sandwich the upper and lower vibration isolator 28U and 28D, and these and the engine mounting portion 5A arranged on the upper contact plate 29U from below. The nut 31 has a bolt 32 with which the nut 31 is screwed, the collar 33 is fitted to the bolt 32, the minimum distance between the upper and lower contact plates 29U and 29D is set, and the upper and lower vibration isolator 28U and 28D are Protects against damage.

A hole 34 having a diameter larger than that of the collar 33 is formed in the engine frame 26 of the support base 25.
A gap 35 is formed between 4 and the collar 33.
An O-ring 36 as an elastic interposer is inserted into the gap 35, and a shallow circumferential groove 37 is formed in the collar 33 to facilitate the arrangement and assembly of the O-ring 36.

Each of the vibration isolator 28 has a rectangular shape in plan view,
The surface that abuts the engine frame 26 is a flat surface, and the surface that abuts the abutting plate 29 has three ridges 28A that are long in the lateral direction.
The protrusions 28A are adapted to more elastically absorb the vibration of the engine 5 in the front-rear direction.
The vibration isolator 28 and the O-ring 36 are made of an elastic material such as rubber or soft plastic, and the O-ring 36 is located between the engine frame 26 and the collar 33 and is in contact with them. The interposition of the O-ring 36 prevents contact between the engine frame 26 and the collar 33.

That is, even if the vibration isolator 28 is deformed to absorb the vibration and the engine frame 26 and the collar 33 are displaced, the collar 33 does not come into contact with the engine frame 26 by the O-ring 36, so that noise is generated. To prevent the occurrence of. In the second embodiment shown in FIG. 5, in this mount mechanism 27, the surface of each of the upper and lower vibration isolator 28 contacting the engine frame 26 is not a flat surface, but an annular convex portion 28B centering on the bolt 32 is formed. This annular convex portion 28B fills the gap 35 between the engine frame 26 and the collar 33 from above and below, and serves as an elastic interposition to prevent contact between the engine frame 26 and the collar 33. .

The present invention is not limited to the above embodiment, but can be variously modified. For example, the elastic interposer may use a ring having a rectangular cross section instead of the O ring 36 having a circular cross section, the paddy traveling working machine may be a walking type, the engine 5 may be arranged at the center of the traveling vehicle body 4, or the like. Further, the belt transmission device 16 may be a triple tension type three-stage belt transmission device or a continuously variable belt transmission device using a split pulley.

[0016]

According to the present invention described in detail above, the vibration isolator 28U, 2 is provided on the upper and lower surfaces of the engine frame 26 of the traveling vehicle body 4.
8D is abutted, the abutment plates 29U and 29D are abutted so as to sandwich the upper and lower vibration isolators 28U and 28D, and the bolt 32 is passed through them and the engine mounting portion 5A arranged on the upper abutment plate 29U. The collar 33 is fitted between the bolt 32 and the engine frame 26 and the upper and lower vibration isolators 28U and 28D, and the elastic interposition body is arranged between the collar through hole 34 of the engine frame 26 and the collar 33. Therefore, the output shaft 15 of the engine 5 is arranged in a horizontal axis and the transmission shaft 1 of the transmission case 1 is transmitted via the belt transmission 16.
8, even if the power can be transmitted to the engine frame 26
It is possible to prevent the contact between the collar 33 and the collar 33 by the elastic interposition body, and it is possible to prevent transmission of vibration and generation of noise.

[Brief description of drawings]

FIG. 1 is a sectional side view showing a first embodiment of the present invention.

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

FIG. 3 is an exploded perspective view of the main part.

FIG. 4 is a side view of a riding-type rice transplanter.

FIG. 5 is a sectional side view of an essential part showing a second embodiment.

[Explanation of symbols]

 1 Riding type rice transplanter 4 Traveling vehicle 5 Engine 15 Output shaft 16 Belt speed change mechanism 17 Mission case 18 Transmission shaft 25 Supporting base 26 Engine frame 27 Mounting mechanism 28 Vibration-proof body 29 Patch plate 32 Bolt 33 Color 34 hole 360 ring (elasticity) Interposer) 37 Circumferential groove

Claims (1)

[Claims] 1. An engine frame (2) of a vehicle body (4)
6) Contact the anti-vibration body (28U) (28D) on the upper and lower surfaces,
The abutment plates (29U) and (29D) are abutted so as to sandwich the upper and lower antivibration bodies (28U) and (28D), and the engine attachment part (5) arranged on them and the upper abutment plate (29U).
The bolt (32) is passed through and fastened to (A), and the collar (33) is fitted between the engine frame (26) and the upper and lower vibration isolator (28U) (28D) and the bolt (32). An engine mount for a paddy traveling work machine in which an output shaft (15) of (5) is arranged in a horizontal axis so that power can be transmitted to a transmission shaft (18) of a transmission case (17) via a belt transmission (16). An engine mount structure for a paddy traveling work machine, characterized in that an elastic interposition is arranged between the collar through hole (34) and the collar (33) of the engine frame (26).