JPH03119226A - Hydraulically operated lever in extremely small type shovelcar - Google Patents

Abstract

PURPOSE:To increase operational workability from the rear part of a car and to minimize the car body, by arranging control parts in parallel with each other in one place and by protruding these hydraulical operation levers from the upper face of a bonnet cover. CONSTITUTION:Hydraulical control valves 27 are arranged in parallel with each other in one position at the upper front of the upper frame 1, inclining the rear parts thereof. And a hydraulical operation lever 31 is connected to be freely movable at the upper end of the operation rods 37, 37a of these valves. And the supporting points 36 of movable levers are arranged at the upper position within the bonnet frame 11 and further, the front face of the bonnet cover 30 is inclined along rods and the hydraulic operation lever 31 is projected from the upper face. In this way, the front perspective becomes well for the operators rear the car and hence it increases an operational workability and minimizes the car body.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a hydraulic control lever for an ultra-compact excavator, and particularly relates to a hydraulic control lever that is compactly configured by concentrating the hydraulic system control section in one place. This relates to the operating lever.

[Prior Art] Conventionally, there has been no ultra-compact excavator car that can perform excavation work in a narrow space with obstacles erected on the left and right sides. When manufacturing this type of ultra-compact excavator car, the body must be made small (
In order to do this, it is conceivable to configure the vehicle so that there is no driver's seat and the operator performs various operations at the rear of the vehicle body. and,
A bonnet cover is attached to the top of the vehicle body frame to cover the engine, hydraulic system, and other mechanical parts.

[Problems to be Solved by the Invention] When manufacturing the above-mentioned ultra-compact excavator car, it is necessary to simplify the configuration of the hydraulic system within the bonnet frame in order to make the vehicle body lightweight and compact.

Therefore, a technical issue has arisen that must be solved in order to provide an ultra-compact excavator car with a compact structure by concentrating the hydraulic system operating parts in one place and making the vehicle body as small as possible. , the present invention aims to solve this problem.

[Means for Solving the Problems] This invention was proposed to solve the above object, and includes a plurality of hydraulic control valves arranged in parallel at the front upper part of the frame, and an operating rod of the control valves. The operating lever is swingably connected to the upper end of the operating rod, and the swinging fulcrum is provided at an upper position within the bonnet frame. Installed diagonally along the operating rod,
It is an object of the present invention to provide a hydraulic operating lever for an ultra-small excavator car, characterized in that the operating lever is provided protruding from the upper surface of a bonnet cover.

[Function] This invention allows the hydraulic control valve to
) They are arranged in parallel at the front upper part, and an operating lever is connected to the operating rod of the second class control valve and protrudes from the top surface of the bonnet cover. Since a plurality of control valves are concentrated in one place, the configuration of the hydraulic system becomes compact, and the space inside the bonnet cover can be used effectively.

In addition, the operating lever that is frequently operated is provided protruding from the top surface of the bonnet cover, and the swinging fulcrum of the operating lever is provided at the upper part of the inside of the bonnet cover, making it easy for the operator to grasp the operating lever. The operability is also extremely good.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 shows an ultra-compact excavator car, in which a mounting part (3) for a working boom (2) is provided protruding from the front part of an upper frame (1), and a mounting part (3) for a working boom (2) is provided on both left and right sides of the upper frame (1). The crawler frame <4) (4) is placed in the lower part. At the rear of the upper frame (1), a transmission case (5) is mounted on the lower side, and on both left and right sides of the transmission case (5) there are drive sprockets (6
η is provided, and each shaft support (η(7)) is connected to the rear end portions of the left and right crawler frames A (4X4).

Furthermore, driven wheels (8) (8) are pivotally attached to the front ends of the left and right crawler frames (4) (4), and drive sprockets (6)
) (6), and the crawlers (9) (9) are wound therebetween. Then, place the engine 0 [O
will be posted.

A bonnet frame (11) is fixed to the upper part of the upper frame (0), and the bonnet frame (I
1) will be explained. A flat plate (b) is fixed to the top surface of the engine 00) with multiple bolts 0101..., and left and right pillars (+4) 04) are erected on the rear top surface of this plate (b). Upper pipe (l→(l→
Support the rear of the

The upper pipes θ→0 are arranged approximately horizontally from the left and right rear to the front of the vehicle body, and their rear ends are connected by a connecting plate (10), and the upper pipe (II (1) is connected to the front part of the A connecting pipe is installed in the left-right direction, and the upper pipe is bent diagonally downward and bolted to the front upper surface of the upper frame (1).

Furthermore, a connecting frame plate (G) is erected on the upper surface of the front part of the plate, and as shown in FIGS. 2 and 3, the connecting frame plate (G) is connected to the left side plate (1 and The right side plate (A) is erected in parallel in the front-rear direction, and the rear plate 60 connects the respective rear parts of the left side plate (A) and the right side plate, and the cross-sectional view is U-shaped and open to the front. The left and right side members (1)
A top plate (support) is placed between the top end and the top surface of the connecting pipe (b).
At the same time, the front plate (to) is welded to the front of the left and right side plates (II (1), and the connecting frame plate (to the support plate on the right side of In) is erected. Also, the connecting frame plate ( The support plate (b) is provided with mounting seats (c), (c), (c), (c) and mounting holes (g) (to) for pivotally supporting each shaft to be described later.

4 is a side view showing the left side plate, FIG. 5 is a side view showing the right side plate, and FIG. 6 is a side view showing the support plate (2).

As shown in Fig. 1, hydraulic devices such as hydraulic control valves and hydraulic pumps (a) are fixedly installed inside the bonnet frame 01) configured as above, and are connected to Attach the hanging hook (
Tighten the bolts. And the bonnet frame (
Attach the bonnet cover (to) to the bonnet cover (1) to cover the engine (II, etc.)
Various levers such as left and right hydraulic control levers (31) CHI), travel levers for forward/reverse switching (2), auxiliary gear shift lever (1), and step lift lever (2) are protruded from the top surface of ). do. The left and right hydraulic operating levers Ca1) (31) are swingable back and forth, left and right, and their swing fulcrums are provided on the mounting seats (c) and (c) of the connection frame plate (g).

According to FIGS. 7 and 8, the hydraulic operating lever (31) 0
To further explain the installation state of 1), there is an arm plate 0ci at the lower end of the hydraulic operation lever (31) (31).
) (To) is fixedly installed, and this arm plate (B) (
A swing fulcrum part (G) (1) is provided at the lower part of the connecting frame plate (G), and is pivotally connected to the mounting seat 129 (C) of the left and right side members of the connection frame plate (G). Several m control valves (control valves @) are arranged side by side on the left and right, and the upper part of each is fixedly installed with its upper part tilting backward. The upper end of the operating rod @ (b) of each control valve is connected to the lower part of the arm plate (g) of the operating lever (31) and the swing fulcrum part (to). Also, the right side plate (a)
A shaft (2) is pivotally mounted between the lower mounting seat (C) and the mounting seat (C) of the support plate (B), and a control valve (2) for raising and lowering the step is attached to one end of the shaft (G). The operation rod (37) is connected, and the other end of the shaft (to) is connected to the step lift lever (B) via the link (B). On the other hand, the operation rod (37) is connected to the mounting hole on the upper part of the right side plate (1). and the mounting hole of the support plate (b))
A shaft (4) is pivotally mounted therebetween, a lock play (41) is fixed to one end of the shaft (4), and a lock lever (42) is fixed to the other end of the shaft (4). Its tip portion protrudes to the outside through a long hole (43) drilled in the side surface of the bonnet cover (1).

The operator then operates the left and right hydraulic control levers (01)ell).
When pressed in any direction, front, back, left, or right, the hydraulic operating lever 01X31) swings around the swinging fulcrum portions (G), (To), and each operating rod @(B)... controls the control valve @. )... is operated. Along with this operation, the work boom (2) is moved up and down, rotated left and right, and although not shown, the work of lifting the bucket is performed. 00(1)
The shaft (to) that performs the operation for raising and lowering the step, the shaft (4) of the lock lever (42), etc. are concentrated on the connecting frame plate (the connecting frame plate), so the configuration of the hydraulic system is compact. Connecting frame plate (Japanese: left and right side plates (g) (1) and rear plate Ql)
, which forms a U-shaped space when viewed from the side, ensuring sufficient mechanical strength of the bonnet frame (I) even when the vehicle is suspended using the hanging hooks (C). ing.

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-mentioned embodiment, the present invention has the hydraulic control valve and the PA movement point of the operating lever concentrated in one place within the bonnet frame. The structure has become more compact and the space inside the bonnet cover can be used more effectively. Furthermore, since each control valve and operating rod are slanted rearward, the front surface of the bonnet frame and bonnet cover is provided obliquely along the operating lever, providing an extremely good view of the front from the operator at the rear of the vehicle body. This invention has various effects, such as significantly improving the workability while holding the operating lever that is operated frequently, and making it possible to downsize the vehicle body as much as possible.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a partially cutaway side view of an ultra-compact excavator, Fig. 2 is a side view of the main part of a connecting frame plate, and Fig. 3 is a main part of the same. Front view, Figure 4 is a side view of the left side plate, Figure 5 is a side view of the right side plate, Figure 6 is a side view of the support plate, Figure 7 is a front view of main parts showing the configuration of the hydraulic system, and Figure 8 is a side view of the left side plate.
The figure is a side view of the same main part. (+)・・・Upper frame 00・・・Bonnet frame @ (27s)・・・Control valve (1)・
...Bonnet cover 01) ...Hydraulic operation lever (A) ...
・Swinging fulcrum @ (3fs) --- Operating rod

Claims (1)

[Claims] A plurality of hydraulic control valves are arranged in parallel at the front upper part of the frame, the operating rods of the control valves are respectively erected and tilted rearward, and an operating lever is swingably connected to the upper end of the operating rod, and This swing fulcrum is provided at an upper position within the bonnet frame, and further, the front surface of the bonnet cover is provided diagonally along the operating rod, and an operating lever is provided protruding from the top surface of the bonnet cover. Hydraulic operating lever for ultra-compact excavator cars.