JPH0619647Y2 - Arm storage means with parallel link mechanism - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to, for example, a swing in which a base boom is connected to an arm via an upper boom having a parallel link mechanism arranged on the side, and a bucket is provided at the tip of the arm. The present invention relates to the storage of an arm of an excavator (track backhoe) or the like, and more particularly to a storage means of an arm provided with a parallel link mechanism for preventing the stored arm from moving left and right while the vehicle is traveling. .

[Prior art]

In the conventional swivel excavator (see FIG. 4), a base boom 21, an upper boom 23 having a parallel link mechanism 22 arranged on its side surface, and an arm 24 are sequentially connected on a turntable 20,
A bucket 25 is equipped at the tip of the arm 24, and an operator rides in the operator room 26 on the side to allow the bucket 2 to move.
5 is rotated in a predetermined direction and is vertically moved, tilted forward, tilted backward, or rocked to the left or right while excavating a buried hole such as a clay pipe.

[Issues to be solved by the device]

However, in the swing excavator having the above structure, the parallel link mechanism 22 is arranged on the side surface of the upper boom 23, and the upper boom 23 is configured to perform predetermined excavation work while swinging to the left and right. Can be carried out very efficiently, but the retracted posture of the arm 24 and the bucket 25 after completion of the work is such that the base boom 21 is inclined forward as shown in FIGS. 5 and 6. Since the arm 24 and the bucket 25 are bent downward, and the arm 24 is supported by a simple armrest 27 and is stored compactly in a state of being hugged, the parallel link mechanism 22 can be moved to the left or right while traveling. Therefore, there is a risk of moving, and therefore, safe traveling cannot be performed, and there are various problems such as damage to the armrest 27.

[Means for Solving the Purpose and Problem of Invention]

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to connect an arm through an upper boom having a parallel link mechanism arranged on a side surface to a base boom, and to connect the arm to the tip of the arm. Relating to the storage of the arm of a swivel excavator equipped with a bucket (truck backhoe), etc., especially the storage of the arm equipped with a parallel link mechanism to prevent the stored arm from moving left and right while the vehicle is traveling. To provide a means for that purpose, on the turntable mounted on the chassis, an arm is connected via a base boom and an upper boom in which a parallel link mechanism is arranged on the left and right, and a working machine such as a bucket is attached to the tip of the arm. In a work vehicle having a structure in which the arms are stored under the condition that the arms are held under the base boom, both sides and / or the lower surface of the base boom are Configure to provide a contact with the guide member to the arm.

[Action]

Since the above configuration is adopted, it is possible to firmly hold the bucket, including the arm that is stored along the base boom, in a fixed position. The upper boom including the parallel link mechanism as described above will not be displaced in the left-right direction, and stable running of the vehicle and damage to the equipment will not occur.

〔Example〕

An embodiment of a storage means for an arm having a parallel link mechanism according to the present invention will be described in detail below with reference to FIGS. 1 to 3 (a) and (b).

In the figure, reference numeral 1 is a work vehicle equipped with a storage means for an arm having a parallel link mechanism according to the present invention (in this embodiment, a turning excavator will be described as an example), 2 is a turntable, and 3 is A base boom mounted on the turntable 2 so that it can be tilted forward and backward is mounted on an upper part of the base boom 3, and is an upper boom that swings left and right by a parallel link mechanism 5 arranged on a side surface. An arm 7 connected to the upper boom 4 is a bucket mounted at the tip of the arm 6, and the bucket 7 is configured to swing by the operation of a cylinder 8 mounted along the arm 6.

By the way, a pair of guide members 9 are provided on both side surfaces of the upper part of the base boom 3, the tips of which are projected in the same direction from the side surfaces, and when the arm 6 is stored, the tip portion of the arm 6 has both guide members. It is adapted to be fitted between 9 and 9 so as to be stably held.

Hereinafter, the operation of the storage means of the arm having the parallel link mechanism according to the present invention will be described based on the above-mentioned configuration.

That is, the arm storing means having the parallel link mechanism according to the present invention is provided with a pair of guide members 9 and 9 each having a tip protruding in the same direction from the side surface on both upper side surfaces of the base boom 3 and the guide member. Since the tip of the arm 6 to be stored between 9 and 9 is fitted to keep the arm 6 from swinging left and right, the upper boom 4, the parallel link mechanism 5, the arm and Even if vibration is applied to the bucket 7 and the bucket 7, the upper boom 4, the parallel link mechanism 5, the arm 6 and the like are stably held in a substantially straight line state with respect to the base boom 3.

In the above embodiment, the pair of guide members 9, 9 is provided on the side portion of the base boom 3 to hold the arm 6 in a fitted state. However, for example, a pin is projected on the lower surface of the base boom 3,
The pin may be held by being inserted into a guide hole formed in the arm 6, and the pin is not particularly limited to the above embodiment.

[Effect of device]

As described in detail above, the present invention connects an arm via a base boom and an upper boom having a parallel link mechanism arranged on the side on a turntable mounted on a chassis, and a working machine such as a bucket is attached to the tip of the arm. In a work vehicle having a structure in which the arm and the like are stored while the arm is held under the base boom, guide members that abut the arm are provided on both sides and / or the lower surface of the base boom. Since it is configured to be provided, it is possible to firmly hold a fixed position such as a bucket including an arm that is stored along the base boom, and therefore, while the vehicle is traveling, it is possible to maintain the same position as in a conventional swing excavator. There is no horizontal displacement of the upper boom including the parallel link mechanism, stable running of the vehicle and damage to equipment etc. do not occur, and the structure is very simple Moreover, since it is inexpensive, the guide member is mounted on the side surface or the bottom surface of the base boom, so that it does not impair the appearance and does not interfere with the work. Have an effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a swivel excavator equipped with an arm storing means having a parallel link mechanism according to the present invention, and FIG. FIG. 3 (a) is a plan view, FIG. 3 (b) is a sectional view, FIG. 4 is a perspective view of a conventional swivel excavator, and FIG. A side view and FIG. 6 are plan views of the same. 1 ... Revolving excavator, 2 ... Turntable, 3 ... Base boom, 4 ... Upper boom, 5 ... Parallel link mechanism,
6 ... Arm, 7 ... Bucket, 8 ... Cylinder, 9 ...
... Guide member.

Claims (3)

[Scope of utility model registration request] 1. An arm is connected to a turntable mounted on a chassis through a base boom and an upper boom having a parallel link mechanism arranged on a side surface, and a working machine such as a bucket is mounted on a tip of the arm, and In a work vehicle having a structure in which the arms and the like are stowed under the base boom, the guide members that contact the arms are provided on both sides and / or the lower surface of the base boom. A means for storing an arm having a parallel link mechanism. 2. The parallel link mechanism according to claim 1, wherein guide members provided on both sides of the base boom extend downward to hold the arm in a clamped state. A means for storing the arm. 3. The utility model registration claim 1 in which the guide member provided on the lower surface of the base boom is a pin, and the pin is configured to fit into an insertion hole provided in the arm. Means for storing the arm equipped with the parallel link mechanism of.