JPS5938534Y2 - power working machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a support device for a main excavation boom of a power excavator or the like.

In conventional machines of this kind, a main boom is attached to a bracket portion of the machine frame body so as to be swingable in the left-right direction, and the main boom is swingable in the left-right direction by a hydraulic cylinder.

Therefore, when performing excavation work by positioning the main boom at both left and right ends, the main boom cannot be supported reliably.

Therefore, the present invention eliminates the above-mentioned drawbacks and makes various operations more efficient by providing a mounting bracket for attaching the main boom and a separate connection part on the machine frame body side that can be fixed when the main boom is operated at both left and right ends. Moreover, it provides a power working machine that can be operated safely.

The mode of implementation of the present invention will be described in detail below with reference to illustrative drawings. 1 is a machine frame body of a power working machine, and an excavation device 2 is attached to the front part so as to be able to move up and down in the vertical direction and swing freely in the left and right directions. There is.

A main boom 3 connects an intermediate boom 4 and an excavation packet 5, and has a base 6 mounted on a mounting bracket 7 so as to be vertically movable.

Reference numeral 8 denotes a U-shaped bracket that supports the mounting bracket 7 so as to be able to swing freely in the left-right direction, and is provided protruding from the front side of the machine frame body 1.

Numeral 9 is a fulcrum pin, and 10 is a hydraulic cylinder interposed between the inside of the machine frame body 1 and the left side of the mounting bracket 7. By expanding and contracting the hydraulic cylinder as appropriate, the entire main boom 3 can be freely swung left and right. It's bottomed out.

11 is a bottle hole bored in the protrusion 12 on the left side of the mounting bracket 7;
Reference numeral 13 designates a pin hole bored in the protrusion 14 on the right side, and the pin hole 11.13 is located in front of the fulcrum pin 9, and the pin hole 11 is located in front of the fulcrum pin 9. This is located ahead of the -1 position.

Reference numeral 15 denotes a bottle hole bored in a protruding seat 16 protruding from the left side of the front end of the machine frame body 1, and numeral 17 denotes a bottle hole bored in a protruding seat 18 protruding from the right side.

The pin hole 15.17 on the machine frame side is inserted into the pin hole 13.1 when the mounting bracket 7 swings greatly to the left or right.
It is provided at a position that matches 5.

21 is a fixing pin. Further, S is a recess space provided in the machine frame main body 1 located above the base end of the protruding seat portion 16, and the space S is formed in a concave shape with a front opening, and a protrusion provided on the left side surface of the mounting bracket 7. 12 The outer peripheral edge is at the bottom of the tank so that it can be fitted.

22 is a traveling device that rotatably supports the machine frame body 1; 23;
is the engine mounted at the rear.

The present invention has the above-mentioned configuration, and therefore, during normal work, the machine frame body 1 is fixed and only the main boom 3 side is swung left and right by the hydraulic cylinder 10 to perform excavation work. For example, when digging a trench, etc., when performing excavation work with the mounting bracket 7 of the main boom 3 moved largely to either the left or right, it is necessary to align the bottle holes 11 and 15 when the mounting bracket 7 of the main boom 3 is moved to the left. and fit the fixing pin 21. Conversely, when it moves to the right, the bottle holes 13 and 17
In this case, since the pin holes 11 and 13 are located forward of the fulcrum pin 9, the main boom 3 can be moved from side to side. It is possible to perform excavation work by raising and lowering only in the vertical direction while rotating as much as possible laterally, and also when the pin hole 1 and the bottle hole 15 are aligned. The connecting pivot portion 10-1 at the tip of the hydraulic cylinder 10 fits into the recessed space S and does not interfere with the machine frame body 1.

As described above, in the case of the present invention, the mounting bracket for attaching the main boom is made swingable by a hydraulic cylinder, but the mounting bracket is fixed in either the left or right position, so it is a drilling equipment. The main boom can be securely fixed to the machine frame body even when the main boom has been moved widely at both left and right ends. Therefore, the main boom can be operated without accidentally falling over or vibrating. can be carried out safely and efficiently.

Moreover, it has a simple structure, and has the advantage of being easy to handle while being able to perform any work smoothly as a whole.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Figure 1 is a power working machine equipped with the device of the present invention, Figure 2 is an enlarged plan view of the main parts of the present invention, and Figure 3 (a) and (1) are the same. A plan view showing the operating state, and FIG. 4 is a sectional view of the main part. 1: Machine frame body, 3: Main boom, 5: Excavation packet, 6
: Base, 7: Mounting bracket, 8: U-shaped bracket, 9: Fulcrum pin, 10: Hydraulic cylinder, 11°13, 15.1
7: bottle hole, 21: fixing pin, S: recessed space.

Claims (1)

[Scope of utility model registration request] The base 6 of the main boom 3 on which the excavation packets 5 are connected is pivoted to a mounting bracket 7 so as to be vertically movable, and the mounting bracket 7 is connected to a U-shaped bracket 8 of the machine frame body 1 via a fulcrum pin 9. In a device that is pivotably supported so as to be swingable in the left and right directions,
The tip of a hydraulic cylinder 10 provided on the side of the machine frame body 1 is pivoted to one side of the mounting bracket 7 so that it can swing freely in the left and right directions.
are located forward of the fulcrum pin 9, respectively, and pin holes 1 are also provided at both left and right positions of the front end of the machine frame body 1.
5.17 A power working machine characterized in that the mounting bracket 7 is swingable and can be fixed to the bottom of the tank with a fixing pin 21 at either the left or right side position.