JP2000313238A - Engine supporting construction for swivel working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange an engine in the vicinity of the rear end of a swivel base and sufficiently protect the engine from impact in a construction in which the engine of a small-sized drilling work vehicle is loaded on the swivel base through three supporting parts by loading the respective supporting parts on the swivel base through vibrationproof rubber. SOLUTION: A swivel working vehicle having a crawler type running device is provided with a turntable 8 borne capably of left and right swivelling, and an engine 30, a fuel tank 38, and the like are loaded on the turntable 8. In this case, the engine 30 is arranged on the reae part of the turntable 8 so that the arranged direction is a little inclined in the longitudinal direction rather than the lateral direction, the front end side of the engine 30 is set in the vicinity of the rear end position of the circular-arc-like turntable 8, and the center of gravity of the turntable 8 is positioned rearward. This engine 30 is supported with three points of supporting parts 40A-40C, and the respective supporting parts 40A-40C are loaded on the turntable 8 through vibrationproof rubber. A rolling stopper mechanism 50 is arranged in the vicinity of the flywheel case 31 of the engine 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler-type traveling device in which a digging device such as a boom, an arm, and a bucket is disposed at a front portion of a seat, and a turning frame is disposed within the width of the crawler-type traveling device. The present invention relates to an engine support structure for a small excavating work vehicle capable of digging a gutter in an alley that can pass.

[0002]

2. Description of the Related Art Conventionally, a swivel is mounted on a crawler-type traveling device, and an engine, a battery, a fuel tank, and the like are mounted on the swivel, and the engine is supported via anti-vibration rubber. It is known that the vibration isolating rubber is disposed at the four corners of the engine or further between them.

[0003]

However, in the above-mentioned prior art, the more the vibration isolating rubber is arranged, the more the vibration of the engine can be suppressed, but the size and weight can be reduced, and the small turning can be performed. In turning work vehicles, reducing the number of parts has become an issue, and further reduction in the number of parts is desired. Since the work machine is located at the front of the fuselage, heavy components such as the engine should be placed as far back as possible.However, if the vibration-proof rubber is attached to the four corners, the Because of the configuration, the engine is disposed further inside from the mounting body of the vibration isolating rubber, so that the center of gravity of the engine also moves forward. Therefore, an attempt is made to provide an anti-vibration support structure so that the center of gravity of the engine is located as rearward as possible. Also, when the engine starts rotating, the reaction force causes the engine housing to rotate in the opposite direction about the crankshaft, but this rotational force is also suppressed.

[0004]

The above is the problem to be solved by the present invention. Next, means for solving the problem will be described. That is, in the configuration in which the engine is mounted on the swivel base by the three support portions, the engine is mounted on the swivel base with the vibration isolating rubber interposed in each of the support portions.

[0005] In addition, a structure is adopted in which a support portion is disposed at the rear portion of the flywheel case of the engine, and the support portions are disposed on both left and right sides of the front portion of the engine.

Further, a rolling stopper mechanism of the engine is arranged on one or both sides of the flywheel case.

In the rolling stopper mechanism, a rotating plate is disposed on one or both sides of the flywheel case, a regulating plate is erected on a frame of the swivel table, and a buffer mounted on the regulating plate is provided. One end of the rotation plate is sandwiched by rubber.

In addition, a rotating plate is disposed on each of the right and left sides of the flywheel case, the rotating plate is extended downward, and two regulating plates are erected on a swivel base. The rotation plate is configured to restrict rotation.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is an overall view of a turning work vehicle according to the present invention, FIG. 2 is a plan view showing the inside of a turning table, FIG. 3 is an engine front view showing an engine and a support structure, FIG. 4 is an engine side view, and FIG. It is a side view of a support part.

First, the configuration of a turning work vehicle equipped with the crawler traveling device of the present invention will be described. In FIG. 1, the turning work vehicle has a turning table bearing 7 arranged at the upper center of the crawler traveling device 1, and the turning table bearing 7 is used by the turning table bearing 7.
The bearing is supported so that it can turn left and right. At the front and rear ends (the rear side in the embodiment shown in FIG. 1) of the crawler type traveling device 1, a soil discharging plate 10 is disposed so as to be vertically rotatable.

Above the turntable 8, a hood 9 and an operator's seat 21 for covering the engine 30, the fuel tank 38, and the like are provided. Above the hood 9 and the operator's seat 21, a canopy 22 is provided. The lower end of the boom 6 is pivotally supported by a boom bracket 12 attached to the front end of the revolving base 8 so as to be rotatable left and right. The distal end of the boom 6 pivotally supports the arm 5, and the distal end of the arm 5 pivotally supports the bucket 4 which is a working attachment. The work implement 2 is configured by the boom 6, the arm 5, the bucket 4, and the like. The boom 6 is turned up and down by a boom cylinder 23 and the arm 5
Is rotated up and down by an arm cylinder 25, and the bucket 4
Is rotated up and down by a bucket cylinder 24. Also,
The boom bracket 12 is rotatable left and right by a swing cylinder (not shown) provided in the swivel 8, so that the work machine 2 is configured to perform excavation work while rotating up and down and left and right.

A hydraulic oil tank and a fuel tank 38 are mounted on the right side of the swivel 8 on the right side, and the whole is covered with a bonnet 9. The bonnet 9 is formed in a half-moon shape in plan view and arranged on the rear part of the swivel 8. A driver's seat 21 and a canopy 22 are attached near the center, and a step is formed in the front part of the driver's seat 21. The walk-through method allows the passenger to get on and off from either side. An operation column 13 is provided upright at the front of the step, and
And an operation lever for operating the crawler traveling device 1 are arranged.

Next, the structure inside the swivel 8 and the hood 9 will be described with reference to FIG. The engine 3 is located at the rear of the swivel 8 (the arrow A in FIG. 2 is in front of the swivel 8).
0 is mounted, and a radiator 35 and an oil cooler are arranged in front of the engine 30 (the arrow F in FIG. 2 is defined as the front of the engine 30). A hydraulic pump 32 is provided behind the engine 30, and a battery 37 is disposed at a side position of the hydraulic pump 32.

Next, the support structure of the engine 30 will be described. As described above, the engine 30 is disposed at the rear position of the swivel 8, and as shown in FIG.
Is mounted with the disposition direction inclined slightly in the front-rear direction than in the left-right direction. The front end side of the engine 30 is located near the rear end position of the arc-shaped swivel 8, and the center of gravity of the swivel 8 is as small as possible. It is arranged to be located at the rear.

At the rear end of the engine 30, a flywheel case 31 having a flywheel (not shown) is integrally fixed to a housing of the engine, and a hydraulic pump 32 is disposed at a rear portion of the flywheel case 31. The output shaft (crankshaft) of the engine 30 is connected to be driven. Further, a starter motor 33 is provided on a side portion of the flywheel case 31,
The pinion fixed to the output shaft of the starter motor 33 meshes with the flywheel gear and the engine 30
Is supplied with electric power from a battery 37 mounted on the side of the camera and can be driven to rotate.

In the present invention, the engine 30
Are supported at three points of support portions 40A, 40B, and 40C, and a rolling stopper mechanism 50 is disposed near the flywheel case 31. 2 and 3
As shown in FIG. 5, the support portion 40A is disposed at the lower left and right center of the rear of the engine 30, that is, near the lower portion of the hydraulic pump 32, and the support portions 40B and 40C are located at the lower left and right positions in front of the engine 30, that is, It is arranged at the lower left and right positions on the radiator 35 side.

As shown in FIGS. 2, 3 and 4, the support portion 40A is composed of brackets 31a and 41, a vibration isolating rubber 42, and the like. As shown in FIG.
Is substantially U-shaped in side view, and is fixed to a lower rear portion of the flywheel case 31. A bracket 41 is fixedly provided on the bottom plate 8a of the swivel 8 below the mounting portion, and the bracket 41 is configured to have an inverted U-shape in a side view. An anti-vibration rubber 42 is mounted on an upper portion of the bracket 41, and the anti-vibration rubber 42 is sandwiched between an upper mounting plate 43 and a lower mounting plate 44, and the upper mounting plate 43 and the lower mounting plate The reference numeral 44 denotes a substantially U-shaped side view, a substantially similar shape, and a substantially parallel arrangement. A plate 43a is provided horizontally at the center of the upper mounting plate 43, and the plate 43a is fixed to a lower portion of the bracket 31a by bolts or the like. The lower mounting plate 44 is fixed to the bracket 41 by bolts or the like. And the upper mounting plate 4
Both sides of the lower mounting plate 44 and the lower mounting plate 44 are inclined in the shape of an inverted C, and are supported by anti-vibration rubbers 42 between them so as to reduce vibration in the vertical and horizontal directions (left and right in FIG. 3). ing.

On the other hand, the support portions 40B and 40C are shown in FIG.
As shown in FIG. 4 and FIG.
5, a bracket 46, an anti-vibration rubber 46a, and the like. The engine support frame 45 includes a back plate 45a, left and right side plates 45b and 45b, and wings 45c and 45c.
Are integrally formed. The rear plate 45a supports the front portion of the engine 30 with a plate that is provided upright in the left-right direction.
45b is extended to support and fix the side surface of the engine 30, and wings 45c are provided on the sides of the side plates 45b.
Has been extended.

As shown in FIG. 5, the wings 45c are bent downward in front of the engine 30, and an upper mounting plate 46 is fixed to the lower portion of the wing 45c by bolts or the like as described above. Have been. The upper mounting plate 46
Are arranged in an inverted U-shape as shown in the figure when viewed from the side of the engine 30, and a vibration isolating rubber 46a is mounted between the upper mounting plate 46 and the lower mounting plate 46b.

A frame 9 erected on a swivel 8
2, a support plate 47 having an inverted U-shaped side surface is provided upright, and a lower mounting plate 46b fixed to a lower surface of the vibration-proof rubber 46a on the upper surface of the support plate 47 is fixed by bolts or the like. I have. An upper stopper member 48U supported on the turntable side is disposed above the wing 45c of the engine support plate 45.
Is provided with a lower stopper member 48D erected from above the bottom plate 8a of the swivel 8.

As described above, in the turning work vehicle according to the present invention, the support is provided at three points of the support portions 40A, 40B, and 40C which are arranged substantially evenly from the center of gravity of the engine 30 mounted on the turning table 8. Therefore, as shown in FIG. 2, the support portion 40B is disposed near the rear end of the turntable 8, and the engine 30
At the rear position as much as possible to achieve a good weight balance of the turning work vehicle.

Then, as described above, the engine 30 is provided at the support portions 40A, 40B, and 40C at the vibration isolating rubber 42.
Since it is configured to be placed on the bottom surface 8a of the swivel base 8 and the frame 92 via the 46a and 46a, the engine 30 can be protected by absorbing vibrations received during work and running. Further, as described above, the stopper members 48U.
Since the 48D is provided, the vertical movement of the engine 30 is restricted when a large impact is received in a work place with a lot of irregularities, so that the engine 30 and peripheral members are not damaged.

Next, the configuration of the rolling stopper mechanism 50 of the engine 30 will be described. As shown in FIG. 3, a rolling stopper mechanism 50 or 50 ′ is provided on a side portion of the flywheel case 31. First, the rolling stopper mechanism 50 will be described. As shown in FIGS. 3 and 4, a rotation plate 51 is fixed to one side or both sides of the flywheel case 31.
Are formed by bending a rectangular plate into an inverted L-shape in a side view, and the ends bent toward the outer side of the flywheel case 31 have upper and lower cushioning rubbers 53a and 52 to be described later.
It extends between a.

On the other hand, a lower regulating plate 52 is erected on the frame 92 of the swivel table 8, and the upper part thereof is inverted L in side view.
It is bent to the flywheel case 31 side in a letter shape, and the buffer rubber 52a is mounted on the upper part of the bent portion. Also,
An upper control plate 53 is fixed to the standing portion of the lower control plate 52 by bolts or the like and extends upward. The upper end of the upper control plate 53 is also bent in an inverted L-shape in a side view toward the flywheel case 31 side, and the bending is performed. The buffer rubber 53a is attached to the lower part of the part. The cushion rubbers 53a and 52a sandwich the bent portion of the rotating plate 51 from above and below with a space therebetween. Thus, the rolling stopper mechanism 50 is constituted by the rotating plate 51, the upper and lower regulating plates 53 and 52, and the buffer rubbers 53a and 52a.

With the above configuration, when the vehicle 30 is rolled around the crankshaft center during running or work, due to the reaction force or load due to the rotation of the crankshaft of the engine 30, the bent portion of the rotating plate 51 is formed. Abuts against the upper and lower cushioning rubbers 53a, 52a to regulate the rolling width. As a result, it is possible to prevent the engine 30 from being greatly damaged by rolling or vibrating, thereby enabling stable driving of the engine 30. Further, the rotating plate 51 is provided with cushioning rubbers 53a, 52a.
The upper and lower restricting plates 53 and 52 serve as shock absorbers.

Next, the rolling stopper mechanism 50 'will be described. On both sides near the flywheel case 31, rotating plates 51 and 56 are fixedly mounted by bolts or the like. In this case, the upper part of the rotating plate 51 is not bent, and the upper and lower regulating plates 53
52 and the like are not provided. The rotating plates 51 and 56
Is formed of a substantially rectangular plate, and extends downward from a side portion of the flywheel case 31. However,
As shown by the broken line in FIG. 3, the lower portion may be bent in an L-shape. On the other hand, on the bottom surface 8a of the swivel base 8, regulating plates 55 having an inverted L-shaped cross section are provided near the lower ends of both ends of the flywheel case 31, and are bent toward the outside of the flywheel case 31, respectively. are doing. Then, the bent portion is connected to the rotating plate 51/56.
Facing the lower end of each of the rotary plates 51
・ It is possible to contact 56. The regulating plate 55
The vertical position of the 55
It is also possible to configure the restriction plates 55 without forming bent portions by bringing them closer to 56.

As a result, as described above, the engine 30
Is rolled, the lower end of the rotating plate 51 or the rotating plate 56 contacts the regulating plate 55 to regulate the rolling width thereof. Further, if the bending portion is provided on the regulating plate 55 as described above, and the left and right plates 51 and 56 are respectively bent toward the flywheel case 31 as shown by the broken lines in FIG. 3, the rolling regulation can function stably. It is possible. Thus, in the present invention, the rolling stopper mechanism 50/5
It is also possible to adopt a configuration using 0 ′ together. Further, the lower part of the rotating plates 51 and 56 or the regulating plate 5
If you attach cushioning rubber or the like to the tip of the bend of 5.55,
Like the rolling stopper mechanism 50, the shock can be absorbed to protect the engine 30 from the impact.

Further, in this embodiment, as shown in FIG.
Although the rolling stopper mechanism 50 is disposed at the rear right side of the flywheel case 31, the rolling stopper mechanism 50 may be disposed at both sides of the flywheel case 31. It is also possible to adopt a configuration in which the engine 30 is disposed only on the left side of the flywheel case 31. In this configuration, the position of the engine 30 is further moved to the rear side of the swivel 8 (the lower side in FIG. 2). The weight balance of the turning work vehicle can be further improved.

[0029]

The turning work vehicle of the present invention is constructed as described above, and has the following effects. That is,
In the configuration in which the engine is mounted on the swivel base by the three support parts, the engine is mounted on the swivel base with the anti-vibration rubber interposed in each of the support parts. As a result, it is possible to dispose it in the vicinity, improving the balance of the turning work vehicle, and sufficiently protecting the engine by the shock absorbing function of the vibration-proof rubber.

Further, since the support portion is disposed at one position at the rear of the flywheel case of the engine and the support portions are disposed at the left and right sides of the front portion of the engine, the structure of the engine by three-point support is stabilized.

Further, since the rolling stopper mechanism of the engine is disposed on one or both sides of the flywheel case, the rolling of the engine which is subject to vibration during running and turning work can be restricted, and the engine can be protected. The effect is increased by arranging the stopper mechanism on the flywheel portion which receives a large amount of rolling drive when the starter motor is driven.

In the rolling stopper mechanism, a rotating plate is disposed on one or both sides of the flywheel case, a regulating plate is erected on a frame of the swivel table, and a buffer mounted on the regulating plate is provided. Since one end of the rotating plate is sandwiched by rubber, it is possible to prevent the rolling stopper mechanism of the engine from applying a large impact to the engine.

In addition, a rotating plate is provided on both the left and right sides of the flywheel case, the rotating plate is extended downward, and two regulating plates are erected on a swivel base. Since the rotation of the rotation plate is restricted, the rolling of the engine can be restricted with a simple configuration.

[Brief description of the drawings]

FIG. 1 is an overall view of a turning work vehicle according to the present invention.

FIG. 2 is a plan view showing the inside of the swivel base.

FIG. 3 is an engine front view showing an engine and a support structure.

FIG. 4 is a side view of the engine.

FIG. 5 is a side view of the engine support.

[Explanation of symbols]

 8 Turning Table 30 Engine 31 Flywheel Case 32 Hydraulic Motor 40 Support 42 Anti-Vibration Rubber 45 Engine Support Frame 46a Anti-Vibration Rubber 50 Rolling Stopper Mechanism 50 'Rolling Stopper Mechanism 52a Buffer Rubber 53a Buffer Rubber

Claims (5)

[Claims] 1. A configuration in which an engine is mounted on a swivel base by three support parts, wherein the engine is mounted on the swivel base by interposing vibration isolating rubber on each of the support parts. Engine support structure of a turning work vehicle. 2. The turning work vehicle according to claim 1, wherein a support portion is provided at a rear portion of the flywheel case of the engine, and the support portions are provided on both right and left sides of a front portion of the engine. Engine support structure. 3. An engine support structure for a turning work vehicle, wherein an engine rolling stopper mechanism is disposed on one or both sides of the flywheel case. 4. The rolling stopper mechanism according to claim 1, wherein a rotating plate is disposed on one or both sides of the flywheel case, a restricting plate is erected on a frame of the swivel table, and a buffer mounted on the restricting plate. 4. An engine support structure for a turning work vehicle according to claim 3, wherein one end of said rotating plate is sandwiched by rubber. 5. A rotary plate is provided on both left and right sides of the flywheel case, the rotary plate extends downward, and two restricting plates are erected on a swivel base. An engine support structure for a turning work vehicle, characterized in that the turning plate is configured to restrict the turning of the turning plate.