JP2018178358A - Breaker attachment structure to bucket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a breaker attachment structure to a bucket configured to allow the bucket and the breaker to be attached to a tip of an arm.SOLUTION: A pair of right and left flat plates 19 provided with a concave part 21 for a bearing on each upper side of the flat plates is attached to an upper part of a back surface of a bucket 12 attached to a tip of an arm 7 and a cylindrical body 20 for a bearing is horizontally attached to a lower part of a back surface of the bucket 12. A horizontal axis 34 and a fitting hole 35 positioned at a lower section of the horizontal axis are formed on a bracket 33 of a breaker 30. A breaker 30 is attached to the back surface of the bucket 12 by inserting a penetration shaft 37 to the fitting hole 35 for the breaker 30, after the horizontal axis 34 of the breaker 30 is supported with the concave part 21 for a bearing and the fitting hole is aligned with both ends of the cylindrical body 20 for a bearing.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a breaker attachment structure to a bucket attached to the tip of an arm of a construction machine. In addition, a breaker is an attachment used when applying an impact to a chisel and crushing concrete, etc., and is generally called an eye.

  For example, as disclosed in Patent Document 1 and Patent Document 2, a construction machine such as a hydraulic shovel car is designed to perform various operations by detachably attaching various attachments to the tip of an arm. As these attachments, the breaker which breaks concrete, the bucket which scoops a fragment and earth and sand, a pile driving tool etc. are typical.

  In a hydraulic shovel car, a bucket is often attached to the tip of an arm for work, and the bucket is a basic attachment. Therefore, when it is desired to use a breaker (eyeon) as an attachment, it is necessary to once remove the bucket from the tip of the arm and attach the breaker. In particular, when it is desired to alternately carry out the work with the bucket and the work with the breaker, there has been a problem that the replacement frequency of the attachment is increased and the workability is significantly reduced.

Japanese Patent Application Laid-Open No. 9-105236 JP, 2015-1079, A

  Accordingly, it is an object of the present invention to solve the above-mentioned conventional problems and to provide a novel bucket-breaker mounting structure capable of mounting both a bucket and a breaker at the tip of an arm.

  The breaker mounting structure to a bucket according to the present invention made to solve the above-mentioned problems comprises a pair of left and right flat plates with bearing recesses mounted on the upper back of the bucket mounted to the tip of an arm of a construction machine Attach the bearing cylinder horizontally to the lower back of the bucket, form a horizontal shaft and a mounting hole located below the horizontal shaft in the breaker bracket, and support the horizontal shaft of the breaker in the bearing recess, The breaker is fitted to the back surface of the bucket by fitting the mounting holes of the above at both ends of the bearing cylinder and inserting the through shaft.

  According to the second aspect of the present invention, preferably, the pair of left and right flat plates are disposed immediately below a bucket connecting pin for connecting the bucket to the bucket swinging link.

  According to the present invention, since the breaker can be attached directly to the back of the bucket at the tip of the arm, when it is desired to alternately perform the work by the bucket and the work by the breaker, the breaker can be simply rotated upward. It becomes possible to use. For this reason, it is not necessary to replace the attachment for removing or attaching the bucket, and the workability can be greatly improved.

  Further, by arranging the pair of left and right flat plates directly below the bucket connecting pin connecting the bucket to the bucket swing link, a sufficient distance can be secured between the flat plate and the bearing cylinder at the upper rear surface of the bucket. Can be attached securely.

It is a side view showing a hydraulic excavator with a bucket attached. It is a side view of a bucket. It is explanatory drawing of a breaker. It is a right view of FIG. It is a side view showing a hydraulic shovel car which attached a breaker to a bucket. It is explanatory drawing of use condition.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is an explanatory view showing a hydraulic excavator equipped with a bucket, in which 1 is a crawler type lower traveling body, and 2 is an upper portion pivotally mounted on the upper portion thereof about a pivot 3 perpendicular to the ground. It is a revolving body. A boom 4 is provided on the front upper portion 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 an end of the boom 4 by an arm attachment 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 attachment shaft 6.

  The 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 outside 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 a bucket cylinder connection 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 swinging 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, but in the present invention, a pair of left and right flat plates 19 and a bearing cylinder 20 are attached to the back of the bucket 12. As shown in FIG. 2, the pair of left and right flat plates 19 is provided with a substantially semicircular bearing recess 21 on the upper side thereof, and is disposed in the upper rear of the bucket 12, preferably directly below the bucket connection pin 17. . The bearing cylinder 20 is horizontally attached to the lower portion of the back surface of the bucket 12. In the present embodiment, the flat plate 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 consisting of a pair of left and right flat plates 32 is attached to the side of the breaker 30. A horizontal shaft 34 is provided at the top of the bracket 33. The horizontal shaft 34 is attached between a 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 the 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. The distance between the left and right 32, 32 of the bracket 33 is slightly larger than the length of the bearing cylinder 20.

  Reference numeral 36 shown in FIG. 3 denotes a hydraulic hose for supplying an operating hydraulic pressure to the breaker 30.

  In order to attach the breaker 30 having the above structure to the back 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 In addition, the through hole 37 and the bearing cylinder 20 are penetrated, and the through shaft 37 is manually inserted. This operation can be performed in such a manner that the breaker 30 is placed on the ground and the horizontal shaft 34 of the breaker 30 is lifted by the bearing recess 21 of the bucket 12. As a result, the breaker 30 can be attached to the back of the bucket 12 as shown in FIG. Thereafter, the hydraulic hose 36 of the breaker 30 is connected to a joint 38 extending from the arm 7 side.

  As shown in FIG. 5 and FIG. 6, if the bucket 12 is rotated so that the back surface of the bucket 12 is in the vertical direction, the breaker 30 also faces in the vertical direction. Alternatively, as shown in FIG. 6, an impact may be applied to the upper end of the pile 40 to drive the pile 40 into the ground.

  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 detaching the bucket 12 from the tip of the arm 7 and attaching the breaker 30 was necessary, but according to the breaker attachment structure to the bucket of the present invention Since the breaker 30 can be easily attached and detached without removing it, the workability can be greatly improved. Furthermore, there are many advantages, such as low cost due to the simple structure.

Reference Signs List 1 lower traveling body 2 upper swing body 3 pivot 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 connection pin 18 Bucket connection pin 19 Flat cylinder 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)

Attach a pair of left and right flat plates with bearing recesses to the top of the back of the bucket attached to the tip of the arm of the construction machine, and horizontally attach the bearing cylinder to the bottom of the back of the bucket
The breaker bracket is formed with a horizontal axis and a mounting hole located below it,
A bucket characterized in that the horizontal shaft of the breaker is supported by the bearing recess, the mounting holes of the breaker are aligned with both ends of the bearing cylinder, and the breaker is attached to the back of the bucket by inserting the through shaft. Breaker mounting structure to.   The breaker attachment structure to a bucket according to claim 1, wherein the pair of left and right flat plates are disposed immediately below a bucket connecting pin that connects the bucket to the bucket swing link.

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