JP6873429B2 - Circuit breaker mounting structure to the bucket - Google Patents

Description

The present invention relates to a circuit breaker mounting structure to a bucket mounted at the tip of an arm of a construction machine. A breaker is an attachment used when crushing concrete by applying an impact to a chisel, and is commonly called an ayon.

As shown in Patent Document 1 and Patent Document 2, for example, a construction machine such as a hydraulic excavator car has various attachments detachably attached to the tip of an arm to perform a required work. Typical examples of these attachments are breakers for crushing concrete, buckets for scooping up crushed materials and earth and sand, and pile driving tools.

In a hydraulic excavator car, a bucket is often attached to the tip of the arm for work, and the bucket is the basic attachment. Therefore, when it is desired to use a breaker (aillon) as an attachment, it is necessary to remove the bucket from the tip of the arm and then attach the breaker. In particular, when it is desired to alternately perform the work by the bucket and the work by the breaker, there is a problem that the frequency of replacement of the attachment increases and the workability is remarkably lowered.

Japanese Unexamined Patent Publication No. 9-10526 Japanese Unexamined Patent Publication No. 2015-1079

Therefore, an object of the present invention is to solve the above-mentioned conventional problems and to provide a breaker mounting structure to a novel bucket in which both a bucket and a breaker can be mounted at the tip of the arm.

The breaker mounting structure to the bucket of the present invention made to solve the above problems is a breaker mounting structure to a bucket including a bucket mounted at the tip of an arm of a construction machine and a breaker mounted on the back surface thereof. A pair of left and right flat plates with bearing recesses are attached to the upper part of the back surface of the bucket, and a bearing cylinder is attached horizontally to the lower part of the back surface of the bucket. By forming a mounting hole located at, the horizontal axis of the breaker is supported by the bearing recess, the breaker mounting holes are aligned with both ends of the bearing cylinder, and the through shaft is inserted, thereby the back surface of the bucket. It is characterized by having a breaker attached to it.

As in claim 2, it is preferable that the pair of left and right flat plates are arranged directly below the bucket connecting pin that connects the bucket to the bucket swinging link.

According to the present invention, the breaker can be directly attached to the back surface of the bucket at the tip of the arm. It becomes possible to use. Therefore, it is not necessary to replace the attachment for removing and attaching the bucket, and the workability can be greatly improved.

Further, if the pair of left and right flat plates are arranged directly under the bucket connecting pin that connects the bucket to the bucket swinging link, a sufficient distance between the flat plate and the bearing cylinder on the upper back surface of the bucket can be sufficiently obtained, and the breaker. Can be securely attached.

It is a side view which shows the hydraulic excavator car which attached the bucket. It is a side view of a bucket. It is explanatory drawing of a breaker. It is a right side view of FIG. It is a side view which shows the hydraulic excavator car which attached the breaker to the bucket. It is explanatory drawing of the use state.

Embodiments of the present invention will be described in detail below.
FIG. 1 is an explanatory view showing a hydraulic excavator car to which a bucket is attached. It is a swivel body. A boom 4 is provided on the upper front surface of the upper swing body 2. The boom 4 can be raised and lowered by a hydraulic boom cylinder 5.

An arm 7 is pivotally attached to the tip of the boom 4 by an arm mounting shaft 6. A hydraulic arm cylinder 8 is provided above the boom 4, and its tip is connected to a bracket 9 at the base of the arm 7 by an arm cylinder connecting pin 10. Therefore, the arm 7 can be rotated up and down about the arm mounting shaft 6.

A bucket 12 is pivotally attached to the tip of the arm 7 by a bucket mounting pin 11. A hydraulic bucket cylinder 13 is provided on the outside of the arm 7. The base of the bucket cylinder 13 is connected to the bracket 8 by a bucket cylinder mounting pin 14. The tip of the bucket cylinder 13 is connected to the main link 15 and the idler link 16 by the bucket cylinder connecting pin 14.

The other end of the main link 15 is connected to the tip of the bucket 12 by the bucket connecting pin 17, and the other end of the idler link 16 is connected to the tip of the arm 7 by the arm connecting pin 18 to form a bucket swing link. There is. Therefore, when the bucket cylinder 13 is contracted, the bucket 12 can be rotated upward about the bucket mounting pin 11, and when the bucket cylinder 13 is extended, the bucket 12 can be rotated downward.

The configuration described above is the same as that of the conventional hydraulic excavator car, but in the present invention, a pair of left and right flat plates 19 and a bearing cylinder 20 are attached to the back surface of the bucket 12. As shown in FIG. 2, the pair of left and right flat plates 19 are provided with a substantially semicircular bearing recess 21 on the upper side thereof, and are arranged on the upper back surface of the bucket 12, preferably directly below the bucket connecting pin 17. .. Further, the bearing cylinder 20 is horizontally attached to the lower part of the back surface of the bucket 12. In the present embodiment, these flat plates 19 and the bearing cylinder 20 are welded to the back surface of the bucket 12, but the mounting method is arbitrary.

On the other hand, as shown in FIG. 3, the breaker 30 is provided with a chisel 31 at its tip, and a bracket 33 composed of a pair of left and right flat plates 32 is attached to the side surface of the breaker 30. A horizontal shaft 34 is provided on the upper portion of the bracket 33. The horizontal shaft 34 is attached between the pair of left and right flat plates 32, 32 of the bracket 33.

A mounting hole 35 is formed below the horizontal axis 34 of the bracket 33. The mounting holes 35 are through holes formed in a pair of left and right flat plates 32, 32 of the bracket 33. The distance between the horizontal shaft 33 and the mounting hole 34 is the same as the distance between the bearing recess 21 and the bearing cylinder 20. Further, the distance between the left and right 32 and 32 of the bracket 33 is slightly larger than the length of the bearing cylinder 20.

Reference numeral 36 shown in FIG. 3 is a hydraulic hose that supplies a hydraulic pressure for operation to the breaker 30.

To mount the breaker 30 having the above structure on the back surface of the bucket 12, the horizontal shaft 34 of the breaker 30 is supported by the bearing recess 21 of the bucket 12, and the mounting holes 35 of the breaker 30 are aligned with both ends of the bearing cylinder 20. Further, the through shaft 37 is manually inserted through the mounting hole 35 and the bearing cylinder 20. This work can be performed by placing the breaker 30 on the ground and lifting the horizontal shaft 34 of the breaker 30 by the bearing recess 21 of the bucket 12. As a result, the breaker 30 can be attached to the back surface of the bucket 12 as shown in FIG. After that, the hydraulic hose 36 of the breaker 30 is connected to the joint 38 extending from the arm 7 side.

As shown in FIGS. 5 and 6, if the bucket 12 is rotated so that the back surface of the bucket 12 is in the vertical direction, the breaker 30 is also turned in the vertical direction. Therefore, the breaker 30 is used to crush the concrete. Alternatively, as shown in FIG. 6, the pile 40 can be driven into the ground by applying an impact to the upper end of the pile 40.

Further, the breaker 30 can be easily separated from the bucket 12 by pulling out the through shaft 37.

As described above, conventionally, a two-step process of removing the bucket 12 from the tip of the arm 7 and attaching the breaker 30 was required, but according to the breaker mounting structure to the bucket of the present invention, the bucket 12 can be mounted. Since the breaker 30 can be easily attached and detached without removing it, workability can be significantly improved. Moreover, since it has a simple structure, it has many advantages such as low manufacturing cost.

1 Lower traveling body 2 Upper swinging body 3 Swinging shaft 4 Boom 5 Boom cylinder 6 Arm mounting shaft 7 Arm 8 Arm cylinder 9 Bracket 10 Arm cylinder connecting pin 11 Bucket mounting pin 12 Bucket 13 Bucket cylinder 14a Bucket cylinder mounting pin 14b Bucket cylinder connecting Pin 15 Main link 16 Idler link 17 Arm connecting pin 18 Bucket connecting pin 19 Flat plate 20 Bearing cylinder 21 Bearing recess 30 Breaker 31 Chisel 32 Flat plate 33 Bracket 34 Horizontal shaft 35 Mounting hole 36 Hydraulic hose 37 Through shaft 38 Joint 40 Pile

Claims (2)

A circuit breaker mounting structure to a bucket including a bucket mounted at the tip of an arm of a construction machine and a breaker mounted on the back surface thereof.
A pair of left and right flat plates with bearing recesses are attached to the upper part of the back of the bucket, and the bearing cylinder is horizontally attached to the lower part of the back of the bucket.
The bracket of the breaker is formed with a horizontal axis and a mounting hole located below it.
The horizontal axis of the breaker is supported in the recess for the bearing, after which the mounting holes of the breaker tailored to both ends of the bearing accommodating cylinder, by inserting the penetration shaft, and wherein the attaching the breaker on the back of the bucket Breaker mounting structure to the bucket. The breaker mounting structure for a bucket according to claim 1, wherein the pair of left and right flat plates are arranged directly below a bucket connecting pin that connects the bucket to the bucket swinging link.

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