JPH0340132Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an excavator attached to a hydraulic excavator used when transplanting trees.

(Conventional technology) Tree transplantation work has traditionally been carried out for purposes such as building land and creating green spaces, and the transplantation work can be broadly divided into tasks such as cutting the roots of trees, digging them up, and loading them onto trucks, etc. The reality is that these tasks mainly rely on human power.

In addition, in order to save labor in the above-mentioned transplanting work, various types of base machines (tractors and hydraulic excavators) have been developed that are equipped with various mechanisms for cutting and digging tree roots at the end of their arms. However, very few have been put into practical use.

(Problems with the prior art) As mentioned above, the conventional transplanting work is very inefficient as it requires a lot of labor and time by human labor, and the digging work during the above work also causes the trees to wither and die. In order to prevent this problem and to improve its rooting after transplanting, an appropriate amount of roots and leftover soil at the base is required, which is particularly time-consuming, so it is desired to use a digging machine to save labor.

In addition, although many of the above-mentioned excavators have already been developed and proposed, for example, the tractor-type excavator uses a traveling device to set the position, so it does not disturb or compact the ground (particularly soft) in the plantation. Furthermore, small excavators that rely on the weight of the driver are at risk of falling over due to the ground. In the case of large excavators, the structure is extremely complicated and the cost is high, and there are problems in terms of performance and work efficiency such as setting around trees, cutting roots, digging, etc., and they are not practical. The development of an excellent excavator is desired.

(Purpose of the invention, means for solving problems) The present invention was devised in view of the above-mentioned actual situation, and is a device that is pivotally attached to the tip of the arm of a fully swinging hydraulic excavator via a support member, and that extends forward. A U-shaped frame that can be vertically swung by a protruding oscillating cylinder, and a circular support spherical surface that can be rotated and whose both ends are attached to the inside of both ends of the U-shaped frame by a rotating shaft. An arcuate blade, a gear transmission mechanism disposed at both ends of the U-shaped frame to rotate the arcuate blade via the rotation shaft, and a rotation cylinder attached to the arm via a Y-shaped rod. The structure of the excavator attached to the hydraulic excavator is characterized by a blade operating mechanism connected to the gear transmission mechanism, and a U-shaped frame is attached to the tip of the arm of the fully rotating hydraulic excavator as a supporting member. The blade is protruded forward so that it can be swung up and down with a swinging cylinder through the U-shaped frame, and both ends of an arc-shaped blade with supporting spherical surfaces are arranged in both ends of the U-shaped frame so that it can be rotated around a rotating shaft. By rotating the arc-shaped blade using the blade operating mechanism via a gear transmission mechanism, the structure is greatly simplified, and the setting performance around trees, root cutting performance, and digging performance are improved. An object of the present invention is to provide an excavator mounted on a hydraulic excavator that greatly improves work efficiency and eliminates the above-mentioned problems.

(Example) Fig. 1 and Fig. 2 show an embodiment of the present invention. In the figure, 1 is an arm attached to a base machine of a hydraulic excavator, and a pin is attached to the tip of the arm 1. 2a and 2b, the support member 3 is attached, and the base side of the U-shaped frame 5 is pivotally connected to the lower ends of both legs of the support member 3 with pins 4, 4, and protrudes forward. Rear upper part 3a
A swing cylinder 6 is connected between pins 7a and 7b between
The structure is such that the U-shaped frame 5 can be pivoted and connected by a swinging cylinder 6 to vertically swing the U-shaped frame 5 around pins 4, 4, and the bottom of both ends 5b, 5b of the U-shaped frame. Penetration fittings 8, 8 are vertically installed.

Furthermore, both ends 5b, 5b of the U-shaped frame 5
Bearings and mounting the rotating shafts 11, 11 on the rotating shaft 1
Both tips of an arcuate blade 10 having a supporting spherical surface 10a are fixed to the inner end sides of the rotary shafts 11 and 11 by bolts or the like.
11 as the center of rotation.

Furthermore, both ends 5 of the U-shaped frame 5
A speed-increasing gear transmission mechanism 2 consisting of a small gear 21 fixed to the rotating shaft 11 and a large gear 22 fixed to the rotating shaft 23 and meshed with the small gear 21 is disposed on the outside of b, 5b.
1 and 22, respectively, and a Y-shaped rod 33 is pivotally connected to the tip of the piston rod 31a of the rotation cylinder 31 attached to the arm 1 with a pin 32. The blade operating mechanism 30 is constructed by pivoting and connecting the distal end to the ends of swing links 35, 35 fixed to the rotating shaft 23 with pins 34, 34. Note that 37 in the figure is a link bar connected between the pins 32 and 2a, and the arcuate blade 10
The supporting spherical surface 10a has a 1/8 spherical shape and has an area sufficient to support the lower part of the tree's root cut.

(Function) Since the embodiment of the present invention has the above-mentioned configuration, the swing cylinder 6 and the rotation cylinder 3
1, the U-shaped frame 5 and the arcuate blade 10 are arranged as shown in FIG.
The U-shaped frame 5 and the arc-shaped blade 10 are positioned around the tree a by vertical movement of the hydraulic shovel, and the U-shaped frame is moved by lowering the tip of the arm 1 of the hydraulic excavator and extending and contracting the swinging cylinder 6. 5 can be fixed and set on the surrounding ground, and the penetration fittings 8, 8 penetrate into the ground, further strengthening the fixing force of the U-shaped frame 5 (see Fig. 2).

Next, as shown in FIG.
When the piston rod 31a extends, the Y-shaped rod 33 is moved forward as shown by the chain line, and accordingly, the swing link 35 is rotated to the position shown by the chain line, and the large gear 22 is moved together with the swing link 35 through the rotation shaft 23.
is rotated.

If the rotation angle of the large gear 22 is θ ₀ , the number of teeth is Z ₂₂ , the rotation angle of the small gear 21 is θ ₁ , and the number of teeth is Z ₂₁ , then Z ₂₂ /Z ₂₁ =θ ₁ /θ ₀ , and the small gear 21 Since the rotation angle of
1, the arc-shaped blade 10 is rotated through the arrow 1 to obtain the rotation angle θ ₁ of the arc-shaped blade 10 necessary for cutting the roots of the tree a, and the arc-shaped blade 10 is rotated approximately 180 degrees in the direction of the arrow to Root pruning of a.

Next, when the rotating cylinder 31 is slightly shortened, the supporting spherical surface 10a of the arcuate blade 10 will be located below the root cut, so that by raising the arm 1 and expanding and contracting the swinging cylinder 6, Trees a can be dug up and loaded onto trucks, etc.

The U-shaped frame 5 and the arc-shaped blade 10 can be inserted and positioned around the tree a, and the arm 1
The swinging cylinder 6 allows for easy fixation in response to the slope of the surrounding ground, and the penetration of the penetration fitting 8 into the ground prevents the U-shaped frame 5 from shifting, increasing the fixing force. 10 underground entry is accomplished with remarkable smoothness.

In addition, since the Y-shaped rod 33 is used, the gear transmission mechanisms 21 and 22 can be operated without being affected by the tree a, and the stroke of the rotation cylinder 31 is amplified by the rotation amplification function of the gear transmission mechanisms 21 and 22. At the same time, the rotational force of the arc-shaped blade 10 can be increased, and root cutting can be performed smoothly. Further, the support spherical surface 10a of the arcuate blade 10 has an area large enough to support and lift the lower part of the root cut, increasing the ability to advance underground.

The excavator can be easily attached to and detached from the arm 1 and the tip of the rotating cylinder 31 using pins 2a, 2b, and 32, and by employing the gear transmission mechanisms 21 and 22, the rotating cylinder 31 can be connected to the bucket cylinder of a hydraulic excavator. It can be replaced by , and the lack of stroke can be fully compensated for.

(Effects of the Invention) As described above, the present invention includes a U-shaped frame 5 which is pivoted to the tip of the arm 1 via a support member 3 and is operated to swing up and down by a swinging cylinder 6 provided protrudingly, and
Rotating shafts 11, 11 are installed inside both ends of the mold frame 5.
An arcuate blade 10 is provided with a support spherical surface 10a that is rotatably operated, and the arcuate blade 10 is provided at both ends of a U-shaped frame 10 and is rotated via the rotation shaft. The blade operating mechanism 30 is provided with gear transmission mechanisms 21 and 22 that are connected to the gear transmission mechanism, and a rotation cylinder 31 attached to the arm 1 connected to the gear transmission mechanism via a Y-shaped rod 33. The swing cylinder makes it possible to easily and quickly set the U-shaped frame together with the arcuate blade on the ground around the tree.
The swinging cylinder operates a gear transmission mechanism via a Y-shaped rod, allowing the arcuate blade to forcefully and smoothly enter the ground to cut roots and excavate roots. Since the excavator rotates completely, trees can be excavated in a 360-degree direction from a fixed position, which greatly improves work efficiency and reduces driver fatigue.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a side view showing the state in which it is set on a tree. DESCRIPTION OF SYMBOLS 1... Arm, 3... Supporting member, 5... U-shaped frame, 6... Swinging cylinder, 10... Arc-shaped blade, 11... Rotating shaft, 21, 22... Gear transmission mechanism, 30... Blade operation mechanism, 31...
Rotating cylinder, 33...Y type rod.

Claims (1)

[Scope of utility model registration request] A U-shaped frame is pivotally attached to the tip of the arm of a fully swinging hydraulic excavator via a support member and is operated to swing up and down by a swinging cylinder protruding forward, and both tips of the U-shaped frame rotate inside. an arcuate blade with a supporting spherical surface that is rotatably mounted at both ends thereof by a shaft; and an arcuate blade provided at both ends of the U-shaped frame and rotated via the rotation shaft. An excavator mounted on a hydraulic excavator, characterized in that it is equipped with a gear transmission mechanism and a blade operation mechanism in which a rotation cylinder attached to the arm is connected to the gear transmission mechanism via a Y-shaped rod. Machine.