JP2015129423A - Can making structure and construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology that enables simpler performance of an operation for welding a boss and a plate to be welded to the boss.SOLUTION: An arm 1 includes an upper plate 11, a lower plate 12, a left side plate 13, a right side plate 14, and a boss 15. The boss 15 is arranged in such a manner that an axial direction DR is orthogonal to the left side plate 13 and the right side plate 14, and welded to the lower plate 12. The lower plate 12, to which the boss 15 is welded, has a second pad part that is brought into contact with a first pad part provided for the boss 15. The second pad part is configured to make its length in the axial direction DR shorter than the length of the first pad part in the axial direction DR.

Description

The present invention relates to a can manufacturing structure having a boss and a technology related thereto.

  In construction machines such as a hydraulic excavator, a boss is provided on an arm constituting the attachment (see Patent Document 1). For example, in the hydraulic excavator described in Patent Document 1, the boss member (11) is welded to the lower plate (7) of the arm (3).

JP-A-9-125441

  By the way, in the said patent document 1, as FIG.1 and FIG.3 shows, the boss | hub member (11) and the lower board (7) are welded by the lathe type | mold welding.

  However, since the lay-type welding has a lower degree of freedom of the torch angle than fillet welding or the like, there is a problem that the welding operation between the boss member and the lower plate is difficult, and the quality of the weld bead is difficult to stabilize.

  Then, an object of this invention is to provide the technique which can perform the welding operation | work of a boss | hub and the to-be-welded board welded to the said boss | hub more simply.

  In order to achieve the above object, the present invention includes a first plate and a second plate that face each other, a third plate and a fourth plate that connect the first plate and the second plate and face each other, The can manufacturing structure includes a boss that is arranged so that an axial direction is orthogonal to the third plate and the fourth plate, and is welded to one of the first plate and the second plate. Of the first plate and the second plate, a plate to be welded to the boss has a second contact portion that contacts a first contact portion provided on the boss, and the second contact portion is The can-making structure is characterized in that the axial length is shorter than the axial length of the first abutting portion.

  Moreover, it is preferable that the said to-be-welded plate is comprised so that the width | variety of the said axial direction of the area | region corresponding to a said 2nd contact part may become shorter than the width | variety of the said axial direction of areas other than the said 2nd contact part. .

  Moreover, it is preferable that the to-be-welded plate is configured by abutting two plates.

  Moreover, it is preferable that the said 2nd contact part is provided only in one board among the said 2 board | plates which comprise the said to-be-welded board.

  The present invention is also a construction machine, comprising a machine body and an attachment connected to the machine body, the attachment having a can-making structure, and the can-making structures are first to face each other. A plate and a second plate, and a third plate and a fourth plate that connect the first plate and the second plate and face each other, and an axial direction is orthogonal to the third plate and the fourth plate. A boss welded to the inner side of either the first plate or the second plate, and the welded plate welded to the boss among the first plate and the second plate is The second abutting portion is in contact with the first abutting portion provided on the boss, and the second abutting portion has a length in the axial direction shorter than a length in the axial direction of the first abutting portion. There is also provided a construction machine characterized by being configured as described above.

  According to the can manufacturing structure of claim 1, since the boss and the plate to be welded are welded by fillet welding, the degree of freedom of the torch angle is increased, and the welding operation can be performed more easily.

  According to the can manufacturing structure of claim 2, by processing the welded plate, the axial length of the second contact portion can be set to the axial length of the first contact portion without changing the shape of the boss. It is possible to make it shorter.

  According to the can manufacturing structure according to claim 3, since the welded plate is constituted by two plates, a necessary plate thickness can be adopted for each, and the welded plate is constituted by one plate. It is possible to reduce the weight compared to the above.

  According to the can manufacturing structure of claim 4, since the second contact portion is provided only on one of the plates, it is easier to process the welded plate than when the second contact portion is provided on both plates. Become.

  According to the construction machine of the fifth aspect, the welding operation between the boss and the plate to be welded can be performed more easily.

The side view which shows the arm by embodiment of this invention. II arrow line view of FIG. The side view to which the connection part of the boss | hub and the lower board was expanded. IV arrow line view of FIG. Sectional drawing of the VV position of FIG. The figure which shows the lower board which concerns on a modification. The figure which shows the connection part of the boss | hub and lower plate which concern on a modification.

<1. Embodiment>
A can manufacturing structure according to an embodiment of the present invention will be described with reference to FIGS. Hereinafter, an example of an arm (also referred to as an arm can) that constitutes an attachment of a construction machine will be described as an example of a can manufacturing structure.

  FIG. 1 is a side view of an arm 1 constituting an attachment of a construction machine. In FIG. 1, the horizontal direction in the drawing corresponds to the front-rear direction of the arm 1. FIG. 2 is a view taken in the direction of arrow II in FIG.

  As shown in FIGS. 1 and 2, the arm 1 includes an upper plate 11, a lower plate 12 (12 </ b> A, 12 </ b> B), a left side plate 13, and a right side plate 14.

  As shown in FIG. 2, the upper plate 11 and the lower plate 12 (12A, 12B) face each other. Further, the left side plate 13 and the right side plate 14 connect the upper plate 11 and the lower plate 12 and face each other.

  Moreover, as shown in FIG.1 and FIG.2, the arm 1 is further provided with the boss | hub 15 which has the pin hole HL. The pin hole HL is a hole through which a connecting pin is inserted when the arm 1 is pivotally attached to a boom (not shown). As shown in FIG. 2, the boss 15 is arranged so that the axial direction DR of the pin hole HL is orthogonal to the left side plate 13 and the right side plate 14.

  3 and 4 are enlarged views of a connection portion between the boss 15 and the lower plate 12 (12A, 12B). As shown in FIG. 3 and FIG. 4, the boss 15 is configured to include abutting portions 50 </ b> A and 50 </ b> B having a predetermined angle at the lower portion. The boss 15 includes a corner SP formed at a connection portion between the contact portions 50A and 50B.

  On the other hand, the lower plate 12 includes two plates 12A and 12B as shown in FIGS. The plates 12A and 12B are abutted at a predetermined angle along the contact portions 50A and 50B.

  As shown in FIG. 3, the lower plates 12 </ b> A and 12 </ b> B are configured to include contact portions 20 </ b> A and 20 </ b> B that are in contact with the contact portions 50 </ b> A and 50 </ b> B of the boss 15.

  FIG. 5 is a cross-sectional view taken along the line VV in FIG. As shown in FIG. 5, in the present embodiment, the contact portion 20A of the lower plate 12 is configured such that the length in the axial direction DR is shorter than the length in the axial direction DR of the contact portion 50A of the boss 15. . Although not shown, the abutting portion 20B of the lower plate 12 is similarly configured such that the length in the axial direction DR is shorter than the length of the abutting portion 50B of the boss 15 in the axial direction DR.

  In particular, in the present embodiment, as shown in FIG. 4, in the lower plate 12, the width WD12 in the axial direction DR of the region corresponding to the contact portions 20A and 20B is shorter than the width WD11 in the axial direction DR of the other regions. It is configured as follows.

  As described above, according to the arm 1 of the present embodiment, as shown in FIG. 5, the length of the abutting portion 20A of the lower plate 12A in the axial direction DR is longer than the length of the abutting portion 50A of the boss 15 in the axial direction DR. Therefore, the boss 15 and the lower plate 12 can be fillet welded at the part BD. As a result, the degree of freedom of the torch angle when welding the boss 15 and the lower plate 12 is increased, and the welding operation can be performed more easily.

  In particular, according to the arm 1 of the present embodiment, the length of the abutting portions 20A and 20B in the axial direction DR can be reduced by machining the lower plate 12 without changing the shape of the boss 15. It is possible to make it shorter than the length in the axial direction DR.

  In particular, according to the arm 1 of the present embodiment, since the lower plate 12 is constituted by the two plates 12A and 12B, it is possible to employ a necessary plate thickness for each. Therefore, it is possible to reduce the weight as compared with the case where the lower plate 12 is constituted by a single plate.

<2. Modification>
The can-making structure and construction machine according to the present invention are not limited to the above-described embodiments, and various modifications and improvements can be made within the scope described in the claims.

  For example, in the above embodiment, as illustrated in FIG. 4, the case where the plates 12 </ b> A and 12 </ b> B constituting the lower plate 12 are abutted at the corner SP is not limited thereto, but as illustrated in FIG. 6. The plates 12C and 12D constituting the lower plate 12 may be abutted at the position PT.

  In the above modification, the one plate 12C is configured as a bent plate that is bent at a predetermined angle along the contact portions 50A and 50B at the corner SP. Then, a contact portion is provided only on one plate 12C, and the width in the axial direction DR of the region corresponding to the contact portion is shorter than the width in the axial direction DR of the other regions. That is, in the modified example, the lower plate 12 is configured such that a plate 12C including a contact portion and a plate 12D not including the contact portion are abutted at a position PT behind the contact portions 50A and 50B.

  According to such a modification, since the contact portion is provided only for one of the plates 12C and 12D constituting the lower plate 12, the contact portion is provided on both the plates 12C and 12D. Compared to the case, the lower plate 12 can be easily processed.

  Moreover, in the said embodiment, as shown to FIG.4 and FIG.7 (A), the width WD12 of the axial direction DR of the area | region corresponding to the contact part 20A becomes shorter than the width WD11 of the axial direction DR of another area | region. However, the present invention is not limited to this. For example, as shown in FIG. 7B, the width of the lower plate 121 may be configured so as to increase the width of the boss 151 in the axial direction DR from the width WD21 to the width WD22.

  Also in such a modification, the length of the abutting portion 200 of the lower plate 121 in the axial direction DR is shorter than the length of the abutting portion 500 of the boss 15 in the axial direction DR. Therefore, the boss 15 and the lower plate 121 can be welded by fillet welding.

  Moreover, although the case where the lower plate 12 welded to the boss 15 is configured by the two plates 12A and 12B is illustrated in the above embodiment, the present invention is not limited to this, and along the contact portions 50A and 50B of the boss 15. The lower plate 12 may be configured by a single bent plate bent at a predetermined angle.

  Moreover, in the said embodiment, although the case where the boss | hub 15 was welded to the lower board 12 was illustrated, it is not limited to this, Even when the said boss | hub 15 is welded to the upper board 11, the thought of this invention is applied. It is possible.

  As described above, the can making structure according to the present invention is suitable for an arm constituting an attachment of a construction machine, for example.

1 Arm, 11 Upper plate, 12, 12A, 12B Lower plate, 13 Left plate, 14 Right plate,
15 Boss, 20A, 20B contact part, 50A, 50B contact part,
121 Lower plate, 151 boss, 200 contact part, 500 contact part, DR axial direction,
HL pin hole, PT position, SP corner, WD11, WD12, WD21, WD22 width

Claims (5)

A first plate and a second plate facing each other;
A third plate and a fourth plate that connect the first plate and the second plate and face each other;
A boss that is arranged so that an axial direction is orthogonal to the third plate and the fourth plate, and is welded to either the first plate or the second plate;
A can making structure comprising:
Of the first plate and the second plate, the plate to be welded to the boss has a second contact portion that contacts the first contact portion provided on the boss,
The said 2nd contact part is comprised so that the length of the said axial direction may become shorter than the length of the said axial direction of the said 1st contact part, The can manufacturing structure characterized by the above-mentioned. The can-making structure according to claim 1,
The welded plate is configured such that the axial width of the region corresponding to the second contact portion is shorter than the axial width of the region other than the second contact portion. Can manufacturing structure. In the can-making structure according to claim 1 or 2,
2. The can-making structure, wherein the plate to be welded is configured by abutting two plates together. In the can making structure according to claim 3,
A can making structure, wherein the second contact portion is provided only on one of the two plates constituting the welded plate. A construction machine,
The machine body,
An attachment connected to the machine body;
With
The attachment has a can making structure,
The can structure is
A first plate and a second plate facing each other;
A third plate and a fourth plate that connect the first plate and the second plate and face each other;
A boss that is arranged so that an axial direction is orthogonal to the third plate and the fourth plate, and is welded to either the first plate or the second plate;
Including
Of the first plate and the second plate, the plate to be welded to the boss has a second contact portion that contacts the first contact portion provided on the boss,
The construction machine, wherein the second abutting portion is configured such that a length in the axial direction is shorter than a length in the axial direction of the first abutting portion.

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