JPH0363321A - Damping blade for microshovel car - Google Patents

Abstract

PURPOSE:To improve workability during slewing of a boom without lowering the function of a damping blade by a method wherein an arm to which the damping blade in a shape in which the height of an upper edge part is gradually lowered from a central part toward end parts on both sides is mounted is pivotally mounted to the lower part of a boom mounting part. CONSTITUTION:A damping blade 28 formed such that the height of an upper edge part 31 is gradually lowered from a central part toward end parts on both sides is mounted to an arm 29, which is vertically movably and pivotally mounted in the lower part position of a boom mounting part 12 through a hydraulic cylinder 30. When the boom 15 is rotated downward through a boom cylinder 18 to execute an excavation work in a state that the boom 15 is slewed in the oblique frontward direction of a body, a gap C between the boom cylinder 18 and an upper edge part 31 of a damping blade 28 ensures an enough size by sloping the upper edge part 31. This constitution prevents contact of the cylinder 18 with the upper edge part 31 of the damping blade 28.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to an earth removal plate for an ultra-compact excavator car, and in particular, it relates to an earth removal plate for an ultra-compact excavator car that eliminates interference with the boom cylinder. It concerns clay plates.

[Prior Art] Conventionally, this type of ultra-compact excavator car does not exist, but in manufacturing this ultra-compact excavator car, it is conceivable to design the center of gravity to be low in order to reduce the size of the vehicle body. For example, as shown in Figure 6 of the appendix, the mounting portion (2) of the working boom (1) is also provided at a lower position than in a normal shovel car. Furthermore, a configuration in which an earth removal plate (3) is provided in order to level the excavated earth and sand may also be considered.

Thus, the boom (1) has a boom cylinder (4)g,
l:r It rotates up and down, and it turns left and right by the swing cylinder (5) provided on the negative side of the mounting part (2). on the other hand,
The arms (6) (6) of the earth removal plate (3) are pivotally connected to the lower part of the frame (7), and the earth removal plate (3) is moved up and down by one expansion and contraction operation of the hydraulic cylinder (8).

[Problems to be Solved by the Invention] When the earth removal plate (3) is provided in the above-mentioned ultra-compact excavator car, the hydraulic cylinder (8) is operated when the earth removal plate (3) is not in use so as not to obstruct forward and backward movement. Therefore, it is required to maintain the earth removal plate (3) in an elevated state. However, as shown in FIGS. 7 and 8, when the boom cylinder (4) and the swing cylinder (5) are operated to rotate the boom (1) downward, the normal earth removal plate In (3), the boom cylinder (4) is connected to the earth removal plate (3) at both the left and right ends.
) may come into contact with the upper edge (3a).

Therefore, excavation workability with the boom (1) being rotated is reduced.

Therefore, a technical problem arises that needs to be solved in order to improve the excavation workability during boom rotation without reducing the function of the earth removal plate, and the present invention aims to solve this problem. do.

[Means for Solving the Problems] The present invention was proposed to achieve the above object, and includes a working boom attached to the front of a vehicle body, and a boom cylinder and a swing cylinder extending and contracting to move the boom. In a small work vehicle that is designed to be able to rotate vertically and horizontally, the arm of the earth removal plate is pivotally attached to the lower part of the boom attachment part of the vehicle body so as to be able to move vertically, and the upper edge of the earth removal plate is It is an object of the present invention to provide an earth removal plate for use in a micro-compact excavator car, which is characterized in that its height gradually decreases from the center toward both left and right ends.

[Function] This invention provides a soil removal plate at the front of an ultra-compact excavator,
Moreover, the upper edge of the earth removal plate is provided obliquely.

That is, since the height of the upper edge of the earth removal plate is formed so as to gradually decrease from the center toward both left and right ends, when the working boom is rotated downward, A sufficient gap can be secured between the boom cylinder at the boom base and the upper edge of the earth removal plate. Therefore, when the boom turns, it becomes possible to turn the boom further downward,
Improves excavation workability.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5 of the attached drawings. Figures 1 and 2 show an ultra-compact excavator car, in which a work boom attachment part (■) is provided at the front of the frame 00, and an engine θ is mounted at the rear of the frame 00. The swing bracket (B) is attached to the above mounting part (■).
A boom 0 base (150) is pivotally attached to the base of the boom 0. An arm bracket (150) is attached to the − side of this swing bracket (b).
10 is provided protrudingly, and the tip of a swing cylinder (B) provided on an example part of the frame 00 is pivotally connected to the arm bracket (B), and the boom 09 swings left and right by the expansion and contraction of this swing cylinder (B). Then, the boom θ is rotated up and down about the base (151) by the boom cylinder (to) installed between the swing bracket (b) and the middle part (15b) of the boom (2). At the tip of boom 09 (15c) is one end of arm ■ (
190 is pivotally mounted and rotated up and down by an arm cylinder [phase] provided between the middle part (15b) of the boom and one end part (19M) of the six arms. Further, a packet (21) is pivotally attached to the tip end (19b) of the arm, and the packet (20) is configured to be rotated by a packet cylinder.

At the bottom of the engine 0, a transmission case) is fixedly installed, and a drive shaft (c) protrudes from both sides of the mission case, and drive sprockets 0!
This is provided. Passive wheels (4) and (1) are pivotally mounted on the left and right sides of the lower front side of the frame 00, respectively, and the drive sprocket G! ! Wrap the crawler @) between 9) and 9).

In addition, the arm (to) (to the earth removal plate) between the passive wheel (4)
) is pivoted and moved up and down by a hydraulic cylinder [phase].

Figure 3 is a front view of the earth removal plate (2), and the earth removal plate (2)
The upper edge portion 00 of is provided obliquely so that its height gradually decreases from the center toward both left and right ends. Therefore, when carrying out excavation work using the ultra-compact excavator car, the fourth
As shown in Figs.
2) is held in a raised state.

Then, the car body is moved back and forth by driving the crawler Q (Q'/), and the swing bracket (U) is rotated by the swing bracket (O) to rotate the boom 0!19, and the packet is delivered to the excavation location. After that, excavation work is carried out while retracting the boom cylinder (peaks) and rotating the boom θ downward, but the gap ( In C), the upper edge 00 is provided obliquely, so that a sufficient gap size can be ensured.

Therefore, during excavation work with one boom swiveled diagonally forward of the vehicle body, the risk of contacting the upper edge (31) of the boom cylinder (the peak is on the earth removal plate) of the boom (lclil) is eliminated. This makes it possible to excavate by operating the packet while rotating the boom further downward.

Note that this invention can be modified in various ways without departing from the spirit of the invention, and it goes without saying that this invention extends to such modifications.

[Effects of the Invention] As described in detail in the above embodiment, the upper edge of the earth removal plate is provided obliquely. Therefore, when the boom is rotated diagonally forward and the boom is rotated downward, a sufficient gap can be secured between the boom cylinder at the base of the boom and the upper edge of the earth removal plate. Therefore, there is no possibility that the boom cylinder will come into contact with the upper edge of the earth removal plate during the excavation work when the boom is turned. Moreover, the necessary height for the earth removal plate can be secured at the central portion of the earth removal plate, and excavation workability can be improved without reducing the function of the earth removal plate.

[Brief explanation of drawings]

Figures 1 to 5 show one embodiment of the present invention, with Figure 1 being a side view of an ultra-compact excavator, Figure 2 being a partially cutaway plan view of the same, and Figure 3 showing the main parts of the earth removal plate. Figure 4 is a plan view of the main part of the earth removal plate with the boom turned, and Figure 5 is the main part of the earth removal plate with the boom turned.
It is a sectional view taken along the line AA in the figure. Figures 6 to 8 show conventional examples, with Figure 6 being a partially cutaway side view of the soil removal plate, and Figure 7 being a partially cutaway side view of the earth removal plate.
The figure is a partially cutaway plan view of the earth removal plate with the boom turned.
FIG. 8 is a sectional view taken along the line B--B in FIG. 7. 00...Frame 0...0 mounting parts...Boom (B)...Swing cylinder (peak...on the boom cylinder) ...Earth removal plate +)...Arm (to)...Hydraulic cylinder 00...
Upper edge patent Applicant: Iseki Agricultural Machinery Co., Ltd. (3)...To Kamikyu-gun 1117-Φ7 Leh

Claims (1)

[Claims] In a small work vehicle in which a work boom is attached to the front of the vehicle body and the boom can be rotated vertically and horizontally by expanding and contracting a boom cylinder and a swing cylinder, a An ultra-compact device, characterized in that the arm of the earth removal plate is pivotally mounted so that it can move vertically, and the height of the upper edge of the earth removal plate gradually decreases from the center toward both left and right ends. Earth removal plate in a shovel car.