JP2007023607A - Bucket device of excavator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent damage and deformation of a suspension hook in excavation work without causing adverse effect such as reduction in bucket capacity and an increase in excavation resistance. <P>SOLUTION: A hook bracket 26 is installed in a back face part of a bucket 21 together with a bucket bracket 24 for installing the bucket 21 on the arm tip, and the suspension hook 21 is installed on this hook bracket 26 so as to be rotatable around a hook support pin 28. This suspension hook 21 is set in a suspension position suspended by dead weight in suspension work, and is constituted so as to be stored in the hook bracket 26 along a bucket back face by rotating upward from this suspension position in unused time. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an excavator bucket device such as a hydraulic excavator or a wheel excavator.

  For example, as shown in FIG. 10, a hydraulic excavator is configured such that an upper swing body 2 is rotatably mounted on a crawler type lower traveling body 1 and a work attachment 3 is attached to the upper swing body 2.

  The work attachment 3 includes a boom 4, an arm 5 attached to the tip of the boom 4, a bucket 6 attached to the tip of the arm 5, and a boom, an arm, and bucket cylinders 7 for operating them. 8 and 9.

  As shown in FIG. 11, the bucket 6 is formed by a convex curved bottom plate 10, left and right side plates (only one side is shown) 11, and the like, and a bucket bracket 12 made of a pair of left and right plates provided on the back surface of the bottom plate 10. It attaches to the front-end | tip part of the arm 5 via the bucket attachment pin 13.

  Reference numeral 14 denotes a bucket link that transmits the expansion and contraction movement of the bucket cylinder 9 as a rotational movement of the bucket 6, 15 denotes an idler link that regulates the movement of the bucket link 14, and 16 denotes a link for attaching the tip of the bucket link 14 to the bucket bracket 12. It is a mounting pin.

  A suspension hook 17 for performing a suspension operation is attached to the back side of the bucket 6 via a hook bracket 18 so as to be rotatable around a hook support pin 19.

  The suspension hook 17 is set at a suspension position depending on its own weight as shown by the solid lines in FIGS. 10 and 11 during suspension work (when used), and at the time of excavation work (when not in use). It is stored along the back of the bucket as shown by the dotted line.

Patent Documents 1 and 2 show such a bucket device with a hanging hook.
JP 2003-138596 A JP 59-228539 A

  However, according to the known technique shown in Patent Document 1, since the hanging hook 17 is stored along the back of the bucket while being exposed to the outside, as shown in FIG. Contact with is inevitable. For this reason, there is a possibility that the hanging hook 17 is damaged or deformed.

  In addition, the structure which provides a recessed part in the outer surface side of the bucket bottom board 10 and accommodates the hanging hook 17 in this recessed part is disclosed in the literature as a countermeasure against this point.

  However, this is not a good idea because the bucket capacity is reduced by the amount of the recess, and the work efficiency is reduced.

  Moreover, in the well-known technique shown by patent document 2, the structure which provides the cover which protects with the state which suspended the hanging hook 17 on the bucket back side is shown.

  However, according to this known technique, since the protrusion, which is a combination of the hanging hook 17 and the cover that is hanging down, protrudes greatly from the back of the bucket, this protrusion causes a large excavation resistance during excavation work, and the work efficiency decreases. This evil is inevitable.

  Therefore, the present invention provides a bucket device for an excavator that can prevent the suspension hook from being damaged or deformed and that does not cause adverse effects such as a decrease in bucket capacity and an increase in excavation resistance.

  According to the first aspect of the present invention, there is provided a bucket device of an excavator in which a bucket is rotatably attached to a tip of an arm of a work attachment by a bucket mounting pin, and the bucket is rotated by a bucket cylinder and a bucket link. In addition, a pair of left and right plate-shaped bracket members are attached in the vertical direction with a space between each other to form a hook bracket, and the hanging hook has a hook support pin parallel to the bucket mounting pin on the hook bracket. As a center, it is attached so as to be rotatable between a hanging position depending on its own weight and a retracted position stored along the back of the bucket between the bracket materials.

  According to a second aspect of the present invention, in the configuration of the first aspect, a bucket bracket made of a pair of left and right plate members for connecting the bucket to the arm tip portion and the bucket link is provided on the back surface portion of the bucket. Both the bracket materials to be configured are provided continuously and integrally with the both plate materials of the bucket bracket.

  According to a third aspect of the present invention, in the configuration of the first or second aspect, a detachable cover for covering the suspension hook stored between both bracket members of the hook bracket from the back side is provided.

  According to the present invention, a hook bracket made of a pair of left and right plate-shaped bracket members is provided on the back surface of the bucket, and the suspension hook is attached to the hook bracket so as to be rotatable around the hook support pin. Since the bracket material is stored along the back of the bucket between the bracket materials, the suspension hook can be protected by the hook bracket (both bracket materials) for excavation work, and the damage and deformation thereof can be prevented.

  In particular, according to the invention of claim 3, since the suspended hook in the retracted state is covered from the back side by the removable cover, the effect of preventing damage and deformation becomes higher.

  Moreover, since the suspension hook is stored in the hook bracket (between the bracket materials) along the back of the bucket, there is no risk of reducing the capacity of the bucket as in the case where a recess for storing the suspension hook is provided. Since the projection dimension of the projection combined with the hook bracket can be small, excavation resistance due to this projection can be kept small during excavation.

  In addition, according to the invention of claim 2, since both bracket members of the hook bracket are integrally formed with the plate material of the bucket bracket provided on the bucket back portion, not only can the attachment strength of the hanging hook to the bucket be increased, By integrating both brackets, the strength and rigidity of the entire bucket can be increased.

  For this reason, it is possible to improve both the durability of the bucket as the excavator and the load support performance of the bucket as the suspension hook support member during the suspension operation.

  An embodiment of the present invention will be described with reference to FIGS.

First embodiment (see FIGS. 1 and 2)
FIG. 1 is a side view of the bucket device, and FIG. 2 is a view of the bucket 21 of the device as viewed from the back side (illustration of the arm tip portion and the like is omitted).

  The bucket 21 is formed by a convex curved bottom plate 22, left and right side plates 23, 23, and the like, and is attached to the tip of the arm 5 by a bucket bracket 24 and a bucket pin 25 provided on the back surface, as well as a bucket link 14 and an idler. It is connected to the bucket cylinder 9 via a link 15. In FIG. 1, 16 is a link mounting pin for connecting the tip of the bucket link 14 to the bucket bracket 24.

  As shown in FIG. 2, the bucket bracket 24 is formed by attaching a pair of left and right plate members 24 a, 24 a to the bucket back surface portion with a space therebetween, and a hook bracket 26 is provided below the bucket bracket 24 on the bucket back surface portion. Is provided.

  The hook bracket 26 is formed by attaching a pair of left and right plate-like bracket members 26 a, 26 a in the vertical direction with a slightly narrower interval than the plate members 24 a, 24 a of the bucket bracket 24. As shown by the solid line in FIG. 1 and the hanging position where the hanging hook 27 hangs down by its own weight as shown in FIG. 2 and the two-dot chain line in FIG. 1 around the hook support pin 28 parallel to the bucket pin 25. The bracket member 26a, 26a is pivoted rearward from the suspension position so as to be pivotable between the storage position along the bucket back surface.

  Both bracket members 26a, 26a are formed with a shape and dimensions so that the hanging hook 27 does not protrude outside the hook bracket when the hanging hook is stored.

  When the suspension hook is stored, the storage pin 29 is inserted into the upper portion of the hook bracket 25 so as to penetrate the tip hook portion 27a of the suspension hook 27, and the suspension hook 27 is held in the storage state by the storage pin 29. Reference numeral 30 denotes a pin hole above the hook bracket through which the storage pin 29 is passed.

  As described above, the hook bracket 26 composed of a pair of left and right bracket members 26a, 26a is provided on the bucket rear surface, and the suspension hook 27 is provided between the bracket members 26a, 26a of the bracket 26 when not in use (during excavation work). Therefore, the suspension hook 21 can be protected by the hook bracket 26 (both bracket members 26a and 26a) during excavation work to prevent damage or deformation.

  In addition, since the suspension hook 27 is stored in the hook bracket 26 (between the bracket members 26a and 26a) along the back surface of the bucket, there is no possibility that the bucket capacity decreases as in the case where a recess for storing the suspension hook is provided. In addition, since the projection dimension A (see FIG. 1) of the projection combining the suspension hook 27 and the hook bracket 26 can be small, excavation resistance due to this projection can be kept small during excavation.

Second embodiment (see FIGS. 3 and 4)
In the following second to fourth embodiments, only differences from the first embodiment will be described.

  The bucket 21 with a hanging hook has a function as an original excavation tool and a function as a support member that supports a suspension load during a suspension operation.

  Therefore, in the second embodiment, a pair of left and right bracket members 32, 32 (reference numerals only in FIG. 4) are provided continuously over almost the entire height of the bucket back surface so that the bucket bracket is formed at the top. 33, the hook bracket 34 is formed in the lower part.

  That is, the bucket and hook brackets 33 and 34 are integrally formed.

  In this way, not only the attachment strength of the suspension hook 27 to the bucket 21 can be increased, but also the strength and rigidity of the bucket 21 as a whole can be increased by integrating the brackets 33 and 34.

  For this reason, it is possible to improve both the durability of the bucket 21 as an excavating tool and the load support performance of the bucket 21 as a hanging hook supporting member during a hanging operation.

Third embodiment (see FIGS. 5 and 6)
In the third embodiment, the suspended hook 27 in the retracted state is covered from the back side by a detachable cover 35.

  Here, the case where the bucket bracket 33 and the hook bracket 34 of the second embodiment are integrated is taken as an example, and the net-like cover 35 is fitted between the bracket members 32 and 32 and attached by screws or the like (not shown). .

  In this way, the suspension hook 27 is covered from both the left and right sides by the bracket members 32, 32 and can be protected by the cover 35 from the back side, so that the suspension hook 27 is more effectively prevented from being damaged and deformed during excavation work. Become.

  In addition, the structure which attaches this cover 35 is applicable also when providing the bucket bracket 24 and the hook bracket 26 of 1st Embodiment separately.

  Further, the cover 35 may be formed in a plate shape or a lattice shape instead of the net shape.

4th Embodiment (refer FIGS. 7-9)
Some shovels allow the work equipment at the tip of the attachment to be exchanged among a plurality of types such as buckets, breakers, and forks according to the work content (excavation, crushing, cargo handling, etc.).

  In the fourth embodiment, in such a work device exchangeable excavator, either the case where the suspension hook 27 is attached to the bucket 21 or the case where the suspension hook 27 is attached to the work device attachment portion with the bucket 21 removed. Can also be selected, and can be easily replaced.

  Here, the case of the bracket integrated configuration of the second embodiment is illustrated.

  In this type of shovel, a quick catch 36 is attached to the tip of the arm 5 as an attachment portion for attaching various working devices including the bucket 21.

  The quick catch 36 is provided with a pair of front and rear locking arms 37, 37 that are opened and closed by a cylinder (not shown). The locking arms 37, 37 are connected to a pin on the working device side (in the case of the bucket 21, FIGS. As shown in FIG. 4, the work device is attached by being engaged with the bucket pin 25 and the link attachment pin 16).

The hanging hook 27 is
(A) In the bucket mounting state, as shown in FIG. 7, the hook support pin 28 is attached to the hook bracket 34 of the bucket 21 as in the first to third embodiments.
(B) When the bucket 21 is removed, the hook 21 is attached to the back side of the quick catch 36 by a hook support pin 38 as shown in FIG.

  Further, the suspension hook 27 rotates upward when not in use, and is stored in the hook bracket 34 in the state shown in FIG. 7 and in the quick catch 36 in the state shown in FIG. In FIG. 7, reference numeral 40 denotes a pin hole into which the hook support pin 38 in FIG. 8 is inserted.

  Therefore, it is necessary to change the suspension hook 27 from the state shown in FIG. 7 to the state shown in FIG. 8 when removing the bucket 21, and vice versa when attaching the bucket 21.

  Here, the distance X1 between the shaft centers of the hook support pin 28 and the storage pin 29 in the state of FIG. 7 is set equal to the distance X2 between the shaft centers of the pin hole 40 of the storage pin 29 and the quick catch 36.

  For example, when the suspension hook 27 is changed from the state shown in FIG. 7 to the state shown in FIG. 8, the suspension hook 27 is first directed upward (in the direction of arrow I) with the hook support pin 28 as shown in FIG. It is rotated and held by the storage pin 29.

  Next, as shown in FIG. 2B, after the hook support pin 28 is pulled out, the suspension hook 27 is rotated upward (in the direction of arrow II) around the storage pin 29 and the hook support pin 38 is inserted. At the same time, the storage pin 29 is removed.

  In addition, what is necessary is just to take the reverse procedure and operation at the time of hook change from the state of FIG. 8 to the state of FIG.

  As a result, the heavy hanging hook 27 can be easily, quickly, and safely replaced with a minimum amount of labor from the state shown in FIG. 7 to the state shown in FIG. 8 or vice versa.

It is a side view of the bucket device concerning a 1st embodiment of the present invention. It is the figure which looked at the bucket of the device from the back. It is a side view of the bucket apparatus concerning 2nd Embodiment of this invention. It is the figure which looked at the bucket of the device from the back. It is a side view of the bucket apparatus concerning 3rd Embodiment of this invention. It is the figure which looked at the bucket of the device from the back. It is a side view of the bucket apparatus concerning 4th Embodiment of this invention. It is a side view of the state which removed the bucket from the arm tip in the device. (A) and (B) are diagrams for explaining a procedure for changing a hanging hook in the apparatus. It is a side view of a hydraulic excavator with a hanging hook. It is a side view of the conventional bucket apparatus.

Explanation of symbols

5 Arm 9 Bucket cylinder 14 Bucket link 21 Bucket 24 Bucket bracket 24a, 24a A pair of left and right plates constituting the bucket bracket 25 Bucket pin 26 Hook bracket 26a, 26a A pair of left and right brackets constituting the hook bracket 27 Suspension hook 28 Hook support Pin 29 Storage pin 32, 32 A pair of left and right bracket materials 33 Bucket bracket 34 Hook bracket 35 Cover

Claims (3)

  In a bucket device of an excavator in which a bucket is rotatably attached to the tip of an arm of a work attachment by a bucket mounting pin, and this bucket is rotated by a bucket cylinder and a bucket link. A bracket is formed by vertically mounting the bracket members with a space between each other, and a hook bracket is formed. The suspension hook hangs on the hook bracket with its own weight around a hook support pin parallel to the bucket mounting pin. A shovel bucket device, wherein the bucket device is pivotably mounted between a suspended position and a retracted position stored along the back of the bucket between the bracket members.   The bucket device of the shovel according to claim 1, wherein a bucket bracket made of a pair of left and right plates for connecting the bucket to the arm tip and the bucket link is provided on the back surface of the bucket, and both the hook brackets are formed. A bucket device for an excavator, wherein the bracket material is provided integrally and continuously with both plate members of the bucket bracket.   The shovel bucket apparatus according to claim 1 or 2, further comprising a detachable cover that covers the suspension hook stored between both bracket members of the hook bracket from the back side.

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