JPH06272280A - Bonnet structure of back-hoe - Google Patents

Abstract

PURPOSE:To dissolve the deposition of mud on a tank cover without degrading any necessary function of a tank capacity or the like by simple remodelling for setting the tank cover from the simple forward slanting condition even to the laterally slanting composite condition. CONSTITUTION:An excavating device A is connected to the intermediate part between the left and right front of a swivel slide 4. An operating section 7 is disposed on the left side and on the other side is disposed a tank section 9 provided with a working oil tank 10 and fuel tank 11 respectively, while a tank cover 12 for covering the tank section 9 is provided. The tank cover 12 is formed on the upper surface part 12u with a composite slant surface lowered toward the front and laterally outward side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bonnet structure in a small turning type backhoe, and more particularly to a technique for making it difficult for excavated mud to accumulate on a tank portion where a hydraulic oil tank or the like is arranged.

[0002]

2. Description of the Related Art In a backhoe, an engine is mounted on a swivel base,
A fuel tank and a control unit are provided, and an excavation work device is also connected. For example, as shown in Japanese Utility Model Laid-Open No. 4-33757, a boom is a small swing type in which a boom can be bent and displaced. A tank portion composed of a fuel tank and a hydraulic oil tank is disposed in the engine, and a driving portion is disposed in the rear portion to achieve a good weight balance. Further, in order to prevent the falling mud from slipping down and collecting on the upper surface of the tank part, the front inclination angle thereof is set to be relatively steep.

[0003]

However, in many cases, the mud does not slide down well at the inclination angle shown in the above publication, and some countermeasures have been required. Therefore,
As a result of an experiment of sliding down mud, it was found that the forward inclination angle needs to be 35 degrees or more. Therefore, in order to give a tilt angle of 35 degrees or more, first, by means of making the front tilt angle steep while keeping the height of the rear end of the tank part as it is, the height of the front end of the tank becomes extremely low and the tank capacity increases. It is reduced and unrealistic. Therefore, in order to secure a sufficient tank capacity, it is conceivable to increase the height of the rear end of the tank portion to secure a forward inclination angle of 35 degrees or more. The height is unnecessarily increased, or a step with respect to the driving portion, which is inconvenient in appearance, is formed, which is also difficult to realize. An object of the present invention is to eliminate the accumulation of mud on the tank portion without causing inconveniences such as reduction in tank capacity and deterioration of appearance.

[0004]

In order to achieve the above object, the bonnet structure of the present invention has an excavation work device connected to the right and left intermediate portions in the front part of a swivel base, and is operated to one side of the excavation work device. Section and a tank section on the other side, respectively, and a tank cover for covering the tank section is provided, and the upper surface section of the tank cover is lower toward the front and lower toward the lateral outside. It is characterized in that it is formed on an inclined surface.

[0005]

In other words, it is a means for making the actual inclination angle steep by forming a compound inclination state in which the side inclination angle is added to the front inclination angle. As a result, the sliding angle can be made as steep as 35 degrees or more while maintaining the same forward inclination angle, and the mud accumulation on the tank can be eliminated without changing the tank capacity or by only slightly reducing it. You can And, even if the overall height is raised to eliminate the tank contraction due to the lateral inclination, the amount of rise is small,
The bulk of the bonnet as a whole is not unnecessarily increased in size, and the connection with the driving part bonnet can be easily brought into a good state without forming a step. Also, with the above-mentioned means of simply tightening the forward inclination angle, the mud slid off from the tank cover tends to accumulate on the crawler, but according to the means of the present application, the mud will fall diagonally forward and sideways. , That inconvenience does not occur.

[0006]

Therefore, by simply modifying the tank cover from the simple forward tilted state to the compound tilted state in which the tank cover is also tilted laterally, the mud on the tank cover is not deteriorated without deteriorating necessary functions such as the tank capacity. It was possible to eliminate the accumulation.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. An ultra-small turning type backhoe is shown in FIG. 3, where A is an excavation work device, 4 is a swivel platform, 5 is a traveling platform, and 6 is a crawler traveling device. The excavation work apparatus A is configured to include a boom 1, an arm 2 and a bucket 3. The boom 1 can be bent and displaced freely, and the bucket 3 is located on the right side of the boom 1 as shown in FIG. Can appear.

As shown in FIG. 2, in the front part of the swivel base 4,
From the left, a control part 7, a connecting part 8 of the excavation work device A, and a tank part 9 are arranged, and a driving part B extending left and right is arranged at the rear part. As shown in FIGS. 1 to 3, the tank portion 9 is provided with a hydraulic oil tank 10 and a fuel tank 11, and the front portion 1
The tank cover 12 is covered with a tank cover 12 having 2f, a right side surface portion 12r, and an upper surface portion 12u, and the tank cover 12 can be swingably opened and closed around a front and rear axis P of the lower end of the right side surface portion 12r.

The upper surface portion 12u of the tank cover 12 is formed as a compound inclined surface that becomes lower toward the front and lower toward the lateral outside. That is, the front inclination angle of the angle α and the side inclination angle of the angle β are provided, and even if the mud falls from the bucket 3 to the tank portion 9, the upper surface portion 12u.
Slides down to the ground. Further, the engine bonnet 13 that covers the drive part B is formed with a corner portion 13k of the arc-shaped upper surface portion on an inclined surface that matches the lateral inclination angle β of the tank cover 12 to improve the appearance.

[Other Embodiments] As shown in FIGS. 4 and 5, the tank cover 12 is extended to the rear end of the swivel base 4 to form a side cover which can be freely opened and closed around the longitudinal axis of the control section. Anything is fine. Further, a structure for opening and closing the tank cover 12 obliquely rearward around the rear end edge of the upper surface portion 12u in the present embodiment and a three-part cover structure for the tank cover 12 and the rear portion of the tank portion 9 in the driving portion B and other driving portions. However, in any case, the upper surface 12u of the tank cover 12 is formed as a compound inclined surface.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a front view of a swivel base portion.

FIG. 2 is a plan view of a backhoe.

FIG. 3 is a side view of the backhoe.

FIG. 4 is a front view of a swivel part having another tank cover structure.

5 is a plan view of FIG.

[Explanation of symbols]

 4 Swivel base 7 Control part 9 Tank part 12 Tank cover 12u Upper surface part A Excavation work device

Claims (1)

[Claims] 1. An excavation work device (A) is connected to a left and right intermediate portion of a front part of a swivel base (4), and the excavation work device (A) is connected.
A control section (7) is arranged on one side of the tank and a tank section (9) is arranged on the other side thereof, and a tank cover (12) for covering the tank section is provided, and an upper surface of the tank cover (12). The bonnet structure of the backhoe in which the part (12u) is formed in a compound inclined surface that is lower toward the front and lower toward the lateral outside.