JPS5825000Y2 - excavator work vehicle - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an excavator work vehicle in which a boom is attached to the traveling vehicle so that it can freely swing up and down, and an arm with a packet attached to the boom is attached to the boom so that it can swing freely around the horizontal axis. The proximal end of the arm, which has a packet attached to the distal end, is pivotally connected to the distal end of the boom so that it can swing up and down, and the proximal end of the boom is pivotally connected to the base attached to the vehicle. death,
The boom is configured by a proximal end member connected to the base side and a distal end member fitted to the proximal end member so as to be extendable and retractable, and the distal end member is The present invention relates to an excavator vehicle that is provided with a fixing device that locks onto the proximal end member at a maximum extension position, a maximum contraction position, and an intermediate position.

Conventionally, in this type of excavator work vehicle,
As shown in Publication No. 53705, the distal end portion of the boom is fitted into the proximal end portion pivotally connected to the base, and the distal end portion is connected to the proximal end portion at multiple points in the longitudinal direction. It is known that the boom can be fixedly fixed, and a hydraulic cylinder for swinging the boom is mounted between the bracket fixed to the proximal end portion and the base.

With this conventional structure, by expanding and contracting the distal end member of the boom relative to its proximal end member, the desired working radius can be obtained and efficient work can be done according to the work situation. At times, the boom can be retracted for safe on-road driving and compact storage.Furthermore, a fixing device that locks the boom's distal end member to its proximal end member allows it to be used in positions with a larger working radius. It has the advantage of being safely locked, but when changing the length of the boom, the distal end member and proximal end member are disengaged and the position is changed to lock the boom. Since the boom itself is heavy, it is difficult to align the boom to secure it, and the work of locking and fixing the distal end member to the proximal end member is extremely troublesome.

The object of the present invention is to improve the positioning of the distal end member and the proximal end member of the boom so that they can be easily engaged with each other.

The feature of the present invention is that, in the excavator vehicle described at the beginning, a hydraulic cylinder for driving the boom is installed between the base and the front end member of the boom, resulting in the following effects. play.

When changing the length of the boom, place the excavation equipment on the ground, release the lock between the tip and base members of the boom, extend and retract the cylinder for raising and lowering the boom, and move the machine forward and backward. to close to the desired locking position.

Next, the aircraft can be stopped, and the cylinder for raising and lowering the boom can be slightly expanded and contracted to finely adjust the distal end member of the boom relative to the proximal end member, thereby making it possible to reliably align the boom. When performing excavation work, the desired excavation work can be performed by swinging the boom up and down using the cylinder for raising and lowering the boom, but the length of the boom, which is a heavy object, can be adjusted by operating the cylinder for raising and lowering the boom. It has the advantage of being able to be safely, reliably, and easily aligned and locked.

Next, embodiments of the present invention will be described based on the drawings.

An engine 2 is mounted on a traveling machine base equipped with a tire-type traveling device 1.
In addition to being equipped with a pressure oil supply device 3, a driver's seat 4, and a first operating section 5 and a second operating section 6 are arranged in the longitudinal direction of the aircraft with the driver's seat 4 in between. A transport device 8 is attached to the front of a traveling vehicle 7 configured to drive
It is used as an excavator vehicle that uses hydraulic oil to perform ground excavation and transportation work.

The excavation device 9 has a mounting frame 1 connected to the traveling vehicle 7.
0, a bracket 12 is attached so that the position can be freely changed in the lateral direction of the aircraft along the guide 11, and this bracket 12
A base 13 is pivotally connected to the base 13 so as to be freely rotatable around a vertical axis 2, and a boom 14, an arm 15, and a packet 16 are pivotally connected to the base 13 so as to be freely swingable around a horizontal horizontal axis. However, it is configured to be driven and moved by hydraulic cylinders 17, 18, and 19, so that ground excavation work can be performed while bending and extending and swinging up and down, and when traveling, the entire body can be stored within the width of the body of the traveling vehicle 7. It's so organized.

As clearly shown in FIG. 2, the boom 14 includes a base end member 20 pivotally connected to the base 13 so as to be vertically swingable;
The arm 15 is composed of two members, a distal end member 21 which is pivotably connected to be swingable around the horizontal axis, and the proximal end member 20 is formed into a rectangular tube shape that becomes thinner toward the distal end. The outer periphery of the member 21 is shaped to have a rectangular cross section to correspond to the proximal member 20, and the distal member 21 is fitted into the proximal member 20, and the distal member 21 and the base 13 are A cylinder 17 is interposed so that the position of the distal end member 21 can be changed with respect to the proximal member 20 by the telescopic operation of the cylinder 17.

Bolt holes 22 are bored at predetermined locations on the distal end side of the proximal end member 20, and bolt holes 23 are provided at intervals in the longitudinal direction on the proximal end side of the other distal end member 21 in correspondence with the bolt holes 22. ... is drilled to fix the length of the boom 14 in the maximum extension state, maximum contraction state, and halfway state, so that work can be done at the desired working radius as appropriate, and when traveling, the boom 14 can be kept in the maximum contraction state. It is designed so that it can be stored within the width of the aircraft.

When working with the excavator vehicle according to the present invention, the boom 14 is held parallel to the ground and expanded and contracted by the cylinder 17 without fixing the proximal end member 20 and the distal end member 21. It is also possible to scoop up dirt, etc.

The boom 14 is in a short state that does not cause any trouble when traveling,
It would be good if it could be changed from this state to a state where the working hand diameter is larger.

Note that the present invention is not limited to the above-mentioned type of excavator vehicle,
It can also be applied to work vehicles that drive with excavation equipment stored in the front and rear directions of the vehicle.

[Brief explanation of the drawing]

The drawings show an embodiment of the excavator vehicle according to the present invention, with FIG. 1 being an overall plan view and FIG. 2 being a partially cutaway side view of the main parts. 7... Traveling vehicle, 14... Boom, 15
... Arm, 16 ... Packet, 17
... Cylinder, 20 ... Base end member,
21... Tip side member.

Claims (1)

[Scope of utility model registration request] The proximal end of the arm 15 having the packet 16 attached to the distal end is pivotally connected to the distal end of the boom 14 so as to be vertically swingable, and the proximal end of the boom 14 is connected to the base attached to the traveling vehicle 7. A proximal end member 20 is pivotally connected to the base 13 and the boom 14 is connected to the base 13 side, and a distal end side that is fitted to the proximal end member 20 so as to be extendable and retractable. member 21, and is provided with a fixing device that locks the distal end member 21 to the proximal member 20 at a maximum extension position, a maximum contraction position, and an intermediate position. An excavator work vehicle characterized in that a hydraulic cylinder 17 for driving a boom 14 is installed across a tip side member 21 of the excavator.