This application is a U.S. National stage application of International Application No. PCT/JP2020/034178, filed on Sep. 9, 2020. This U.S. National stage application claims priority under 35 U.S.C. § 119(a) to Japanese Patent Application No. 2019-167279, filed in Japan on Sep. 13, 2019, the entire contents of which are hereby incorporated herein by reference.
The present invention relates to a bucket tooth adapter for a bucket, a bucket tooth attachment structure for a bucket and a bucket.
As a prior art, JP2007-9631A (Japanese published unexamined patent application) discloses a bucket tooth attachment structure for a bucket. In a conventional bucket tooth attachment structure for the bucket, a bucket tooth adapter is mounted to a bucket via a welding material.
In the conventional bucket tooth attachment structure for the bucket, a fillet welding is used in order to mount the bucket tooth adapter to the bucket. In case that there is a small level difference between a edge plate of the bucket and the bucket tooth adapter, a throat thickness of the fillet welding becomes small at a welding end of the fillet welding. For example, generally, the welding end, which is provided on a tooth side in the fillet welding, is formed in a spire shape. Thus, there is a problem that stress concentration generates at a tip of the welding end when an excavating work and a penetrating work is repeatedly performed with the bucket.
Also, the welding end wears because earth and sand slides on the welding end when an excavating work and a penetrating work is performed with the bucket. Thus, a crack may generate at a tip of the welding end when an excavating work and a penetrating work is repeatedly performed with the bucket.
An object of the present invention is to provide a bucket tooth adapter for a bucket which can stably maintain a mounting state to a bucket. Also, an object of the present invention is to provide a bucket tooth attachment structure for a bucket and a bucket which includes the bucket tooth adapter for the bucket.
A bucket tooth adapter for a bucket according to a first aspect includes a mounting portion and a nose portion extending from the mounting portion. The mounting portion includes a first body portion and a wide portion. The wide portion is formed so as to be wider than the first body portion and is provided between the first body portion and the nose portion.
A bucket tooth adapter for a bucket of the present invention can stably maintain a mounting state with respect to a bucket. Also, a bucket tooth attachment structure for a bucket and a bucket of the present invention can obtain the same effect as the bucket tooth adapter.
Configuration of a bucket 100 according to this embodiment will be described with reference to drawings. The bucket 100 includes a bucket tooth attachment structure 1 for the bucket 100 and a bucket body 2. For example, as shown in
(Bucket Tooth Adapter)
As shown in
As shown in
The mounting portion 19 includes a first body portion 23 and a wide portion 27. Specifically, the mounting portion 19 includes a pair of first body portions 23 and a pair of wide portions 27. The mounting portion 19 further includes a connecting portion 28 which connects the pair of wide portions 27.
The pair of first body portions 23 are disposed so as to be spaced apart from each other. A bottom plate 2a of the bucket body 2 is disposed between the pair of first body portions 23. Each of the pair of first body portions 23 extends from each of the pair of wide portions 27. For example, each of the pair of first body portions 23 extends from each of the pair of wide portions 27 in a direction opposite to a direction in which the nose portion 21 extends.
As shown in
As shown in
Also, as shown in
As shown in
Specifically, as shown in
The protruding portion 31 is a portion which protrudes from the second body portion 29. For example, the protruding portion 31 includes a pair of protruding portions 31. Each of the pair of protruding portions 31 protrudes from the second body portion 29. In other words, each of the pair of protruding portions 31 protrudes from the second body portion 29, when the bucket tooth adapter 3 is viewed from the outside in the longitudinal direction of the bucket tooth adapter 3 (an axial direction along the axis A1). Each of the pair of protruding portions 31 includes a plane 31c and 31d, respectively, provided on a side facing the first body portion 23, as shown in
As shown in
For example, as shown in
As shown in
In this state, as shown in
As shown in
As shown in
As shown in
(Tooth)
As shown in
A second pin hole 33 is provided on the tooth 5. The second pin hole 33 is formed so as to communicate with the first pin hole 13. A pin member 7 is disposed in the second pin hole 33. The pin member 7 connects the bucket tooth adapter 3 and the tooth 5. The pin member 7 is disposed in the first pin hole 13 and the second pin hole 33. The pin member 7 includes an annular groove 7a. The annular groove 7a is disposed between the bucket tooth adapter 3 and the tooth 5. A lock member 9 (described later) is engaged with the annular groove 7a. Specifically, the engaging portion 41a (described later) of the lock member 9 engages with the annular groove 7a.
As shown in
For example, the engaging portion 41a of the lock member 9 is fitted into the annular groove 7a of the pin member 7 by sliding the lock member 9 toward the pin member 7, in a state where the lock member 9 is disposed between the bucket tooth adapter 3 and the tooth 5. Thereby, the tooth 5 is mounted to the bucket tooth adapter 3.
The bucket tooth adapter 3 includes the wide portion 27. The wide portion 27 is formed so as to be wider than the first body portion 23 in a state where the wide portion 27 is provided between the first body portion 23 and the nose portion 21. In this state, the end portion Ye of each of the welding materials Y1, Y2, and Y3 extending along the corners C1, C2, and C3 of the first body portion 23 and the bucket body 2 is welded to the wide portion 27.
In this configuration, the end portion Ye of each of the welding materials Y1, Y2, and Y3 can be abutted to the wide portion 27. Thereby, the throat thickness of the end portion Ye of each of the welding materials Y1, Y2, and Y3 can be sufficiently secured. In other words, occurrence of stress concentration can be suppressed at the end portion Ye of each of the welding materials Y1, Y2, and Y3. Also, earth and sand, which proceeds over the tooth 5 and toward the welding materials Y1, Y2, and Y3, can be prevented by the wide portion 27. In other words, wear of the end portion Ye of each of the welding materials Y1, Y2, and Y3, which generates due to earth and sand, can be prevented by the wide portion 27.
Thus, the bucket tooth adapter 3 can suppress the occurrence of the stress concentration at the end portion Ye of each of the welding materials Y1, Y2 and Y3 and can prevent the wear of the end portion Ye of each of the welding materials Y1, Y2 and Y3. In other words, the bucket tooth adapter 3 can stably maintain a mounted state with respect to the bucket body 2.
Also, the end portion Ye of each of the welding materials Y1, Y2, and Y3 are directly welded to the wide portion 27 on the bucket tooth adapter 3.
Thereby, the bucket tooth adapter 3 can be easily mounted to the bucket body 2, because a polishing work, in which the end portion Ye of each of the welding materials Y1, Y2, and Y3 is shaped, is not required.
Also, wear of the end portion of the side plate 2b due to earth and sand can be suppressed by the tooth 5 and the protruding portion 31a, in case that the bucket tooth adapter 3 (the first body portion 23) is disposed at a position close to the side plate 2b of the bucket body 2.
Also, the bucket tooth attachment structure 1 and the bucket 100 can obtain the same effect as the bucket tooth adapter 3, because the bucket tooth attachment structure 1 and the bucket 100 include the bucket tooth adapter 3.
Although one embodiment of the present invention is described, the present invention is not limited to the above embodiment, and various variations can be made without departing from the scope of the invention.
In the above embodiment, an example is shown in which the lock member 9 locks the pin member 7. A lock of the pin member 7 can be achieved by the other configuration. For example, the pin member 7 can be locked with an engaging member such as a retainer.
In the above embodiment, an example is shown in which the recess portion 32 is formed on the first body portion 23 and the wide portion 27. The recess portion 32 can be formed on one of the first body portion 23 and the wide portion 27.
According to the present invention, the mounting state with respect to the bucket can be stably maintained.
Number | Date | Country | Kind |
---|---|---|---|
2019-167279 | Sep 2019 | JP | national |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/JP2020/034178 | 9/9/2020 | WO |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2021/049547 | 3/18/2021 | WO | A |
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Entry |
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Number | Date | Country | |
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20220290412 A1 | Sep 2022 | US |