Bucket rod with internal reinforcing rib structure and excavator

Abstract

The bucket rod with the internal reinforcing rib structure comprises a bucket rod body, the bucket rod body is composed of a U-shaped plate and a connecting plate, a pair of lug plates are arranged on the outer side of a bottom plate of the U-shaped plate and used for being connected with a bucket oil cylinder, and a middle shaft seat is connected between two side plates of the U-shaped plate and used for being hinged to a movable arm; a reinforcing rib is arranged in the bucket rod, the first end of the reinforcing rib is fixedly connected with the middle shaft seat, and the second end of the reinforcing rib extends to a bottom plate of the U-shaped plate to be welded and fixed. The second ends of the reinforcing ribs are bent to form V-shaped structures, and the V-shaped structures and the dovetail parts of the lug plates are correspondingly arranged on the two sides of the bottom plate of the U-shaped plate; the reinforcing plate and the bottom plate can form a triangular supporting structure, the welding seam strength at the dovetail position of the lug plate is improved, and the bucket rod is effectively prevented from being broken from the position. The supporting plate is connected between the middle shaft seat and the bottom plate and plays a supporting role; the flitch is located on the inner side of the bottom plate, the structural thickness of the dovetail is increased, and attractiveness is not affected; the reinforcing plate synergistic effect effectively improves the weld joint structural strength.

Description

Technical Field

[0001] The invention relates to the technical field of excavators, in particular to a bucket arm and an excavator provided with an internal reinforcing rib structure. Background Art

[0002] The bucket arm is a very important engineering machinery equipment in earthwork conditions and mine construction in construction and mining engineering. The bucket arm is an important part of the excavator's working device. It connects the excavator's boom and bucket, and has a decisive influence on the excavator's operating radius and maximum digging force. The design of the bucket arm also has a certain influence on the excavator's stability.

[0003] As the most direct working part connecting the boom and bucket in the excavator, the dipper arm is subject to the greatest impact and loss, especially the ear plate structure of the dipper arm. Therefore, the ear plate structure needs to be strengthened to prevent the dipper arm from cracking at the ear plate due to stress concentration. Figure 1 As shown, the existing ear plate front end reinforcement method is to attach a reinforcement plate to the upper side of the bucket rod and weld a rib plate inside; the reinforcement plate is located at the dovetail of the ear plate, one end of the rib plate is welded to the middle shaft seat, the other end is welded to the bottom plate of the U-shaped plate, and the two sides are welded to the two side plates of the U-shaped plate. This structural form has the following problems: first, the reinforcement plate needs to be exposed on the outside of the bucket rod, which is not beautiful; second, it was found in the application process that its strength is not enough, and cracks still occur at the bucket rod ear plate during operation. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a boom and an excavator with an internal reinforcement rib structure, wherein the second end of the reinforcement rib is bent to form a V-shaped structure, and the V-shaped structure and the dovetail part of the ear plate are arranged on both sides of the U-shaped plate bottom plate correspondingly, so that the reinforcement plate can form a triangular support structure with the bottom plate, thereby improving the weld strength at the dovetail of the ear plate and effectively preventing the boom from breaking there.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] In the first aspect, a boom with an internal reinforcement rib structure includes a boom body, the boom body is composed of a U-shaped plate and a connecting plate, a pair of ear plates are provided on the outer side of the bottom plate of the U-shaped plate for connecting to the bucket cylinder, a center axis seat is connected between the two side plates of the U-shaped plate for hinged connection with the boom; a reinforcement rib is provided inside the boom, a first end of the reinforcement rib is fixedly connected to the center axis seat, and a second end extends to the bottom plate of the U-shaped plate and is welded and fixed; the second end of the reinforcement rib is bent to form a V-shaped structure, and the V-shaped structure and the dovetail part of the ear plate are arranged on both sides of the bottom plate of the U-shaped plate correspondingly.

[0007] As a further implementation method, the reinforcing rib is composed of a supporting plate, a pasting plate and a reinforcing plate connected in sequence, and a V-shaped structure is formed by bending the reinforcing plate.

[0008] As a further implementation method, one end of the support plate is welded to the central axis seat, and the other end is welded to the bottom plate of the U-shaped plate.

[0009] As a further implementation method, the pasting plate is arranged to fit with the bottom plate of the U-shaped plate, and its two side edges close to the support plate and the reinforcement plate are welded to the bottom plate of the U-shaped plate.

[0010] As a further implementation method, the V-shaped structure formed by the reinforcing plate has an angle of 60°, and the reinforcing plate is welded to the U-shaped plate bottom plate to form a triangular support structure.

[0011] As a further implementation method, both ends of the reinforcing plate are welded to the bottom plate of the U-shaped plate, the interior presents a triangular cavity structure, and the end of the dovetail is located on the angular bisector of the V-shaped structure.

[0012] As a further implementation, the angle between the support plate and the bottom plate of the U-shaped plate is an acute angle, and the angle between the support plate and the mounting plate is an obtuse angle.

[0013] As a further implementation, a through hole is provided at a middle position of the support plate.

[0014] As a further implementation method, two side edges of the reinforcing rib are welded to two side plates of the U-shaped plate.

[0015] In a second aspect, an excavator is provided, characterized in that the excavator is equipped with a boom having an internal reinforcing rib structure as described in any one of claims 1-9.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The second end of the reinforcing rib of the present invention is bent to form a V-shaped structure, and the V-shaped structure and the dovetail part of the ear plate are arranged on both sides of the bottom plate of the U-shaped plate correspondingly, so that the reinforcing plate can form a triangular support structure with the bottom plate, thereby improving the weld strength at the dovetail of the ear plate and effectively preventing the boom from breaking there.

[0018] 2. The reinforcement ribs are composed of an integrated support plate, a pasting plate and a reinforcement plate. The support plate is connected between the center axis seat and the bottom plate to play a supporting role. The pasting plate is used to smoothly extend the reinforcement plate to the dovetail. On the other hand, it is located on the inner side of the bottom plate, which enhances the structural thickness of the dovetail and ensures the structural strength without affecting the appearance. The pasting plate and the reinforcement plate work together to effectively improve the structural strength of the weld at the dovetail.

[0019] 3. The provision of through holes on the support plate of the present invention can release the stress generated after the reinforcement ribs are welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] Figure 1 It is a structural schematic diagram of the existing arm with a reinforcement plate and an internal rib plate;

[0022] Figure 2 Schematic diagram of the structure of the arm in which reinforcing ribs are arranged inside the arm in an embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of the overall structure of the reinforcing rib in an embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of the internal structure of the bucket arm in an embodiment of the present invention.

[0025] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0026] Among them: 1. ear plate, 2. U-shaped plate, 21. bottom plate, 3. central axis seat, 4. reinforcement plate, 5. rib plate, 6. reinforcement plate, 7. dovetail, 8. reinforcement rib, 9. cavity, 10. connecting plate, 81. support plate, 82. pasting plate, 83. reinforcement plate, 811. through hole. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] As mentioned in the background technology, Figure 1 As shown, the existing front end reinforcement method of the ear plate 1 is to attach a reinforcement plate 6 to the upper side of the boom and weld a rib plate 5 inside; the reinforcement plate 6 is located at the dovetail at the rear end of the ear plate to improve the structural strength of the boom at the dovetail and prevent the boom from breaking at the dovetail; one end of the rib plate 5 is welded to the central axis seat, the other end is welded to the bottom plate of the U-shaped plate 2, and the two sides are welded to the two side plates of the U-shaped plate 2. This structural form, firstly, the reinforcement plate needs to be exposed on the outside of the boom, which is not beautiful; secondly, it is found in the application process that its strength is not enough, and the addition of the reinforcement plate is only equivalent to extending the connection length between the ear plate and the U-shaped plate, which improves the connection strength between the dovetail and the bottom plate to a certain extent, but the support strength of the dovetail is limited, so there is still a crack at the boom ear plate during operation.

[0029] Embodiment 1

[0030] In a typical embodiment of the present invention, reference is made to Figure 2-Figure 4As shown, a boom with an internal reinforcement rib structure includes a boom body, which is composed of a U-shaped plate and a connecting plate. A pair of ear plates 1 are provided on the outer side of the bottom plate of the U-shaped plate for connecting the bucket cylinder. A central axis seat is connected between the two side plates of the U-shaped plate 2 for hinged connection with the boom; a reinforcement rib 8 is provided inside the boom, a first end of the reinforcement rib 8 is fixedly connected to the central axis seat 3, and a second end extends to the bottom plate of the U-shaped plate 2 and is welded and fixed; the second end of the reinforcement rib is bent to form a V-shaped structure, and the V-shaped structure and the dovetail part of the ear plate are arranged on both sides of the bottom plate of the U-shaped plate correspondingly.

[0031] like Figure 2 As shown, the two side plates of the U-shaped plate 2 are connected by a connecting plate 10, and the two form the overall structure of the bucket arm. Circular grooves are provided on the two side plates of the U-shaped plate 2, and a central axis seat 3 is connected between the circular grooves. The central axis seat is used to be hinged with the front end of the boom. A hinge seat is provided at the front end of the bucket arm for hinged bucket, and a group of ear plates are provided at the rear end of the bucket arm for connection with the output end of the bucket arm cylinder. A reinforcing plate 4 is provided on the outer side of the side plate of the U-shaped plate 2 around the circular groove to improve the strength, which is the prior art.

[0032] A pair of ear plates 1 are provided at the rear end of the bottom plate of the U-shaped plate for connecting the bucket cylinder. When the excavator is working, stress concentration is likely to occur at the ear plate 1, especially at the dovetail 7 at the rear end of the ear plate, where the connection strength between the ear plate and the U-shaped plate is relatively weak. In serious cases, the bucket rod is likely to break at the dovetail 7.

[0033] In this embodiment, a reinforcing rib 8 is provided inside the arm, and the structure of the reinforcing rib 8 is as follows: Figure 3 As shown, its structure includes a support plate 81, a pasting plate 82, and a reinforcing plate 83. The support plate 81, the pasting plate 82, and the reinforcing plate 83 are connected in sequence and form an integrated structure.

[0034] One end of the support plate 81 is welded to the middle shaft seat 3 to achieve fixed connection, and the other end extends to the bottom plate of the U-shaped plate and is welded and fixed. Figure 4 As shown, one end of the support plate 81 is welded to the outer side of the middle shaft seat 3. The end of the support plate 81 is bent and extended to form a plate 82 structure, and the plate 82 extends toward the front end of the boom.

[0035] like Figure 4 As shown, the pasting plate 82 is a plate-like structure, which is arranged in close contact with the U-shaped plate bottom plate 21, and its two side edges close to the support plate 81 and the reinforcing plate 83 are welded to the U-shaped plate bottom plate 21.

[0036] The support plate is set at an acute angle to the bottom plate 21 of the U-shaped plate, and an obtuse angle to the pasting plate 82, so that the reinforcing plate can be extended to the position corresponding to the dovetail.

[0037] One end of the sticking plate away from the supporting plate 81 is connected to the reinforcing plate 83 , and a V-shaped structure is formed by bending the reinforcing plate 83 . The V-shaped structure and the dovetail part of the ear plate 1 are arranged on both sides of the U-shaped plate bottom plate 21 correspondingly.

[0038] like Figure 2-Figure 4 As shown, in order to improve the strength of the dovetail of the ear plate 1, the reinforcing plate is bent to form a V-shaped structure, and the side edges at both ends of the reinforcing plate are welded to the U-shaped plate bottom plate, so that a triangular stable support structure is formed between the V-shaped reinforcing plate and the bottom plate 21, thereby improving the structural strength here.

[0039] It can be understood that the reinforcing plate 83 is located at the side of the bottom plate 21 away from the dovetail, so that when the ear plate 1 is subjected to force, the force at the dovetail is shared by the reinforcing plate 83, thereby reducing the risk of the boom cracking from this point.

[0040] The V-shaped structure formed by the reinforcing plate 83 has an angle of 60°, so that the reinforcing plate and the bottom plate 21 form a stable equilateral triangle structure. The two sides of the reinforcing rib 8 are welded to the corresponding side plates. The reinforcing plate 83, the bottom plate 21 and the side plates form a triangular cavity 9 structure to ensure structural stability.

[0041] The present embodiment provides the plate 82, which, on the one hand, facilitates the end of the support plate to extend toward the front end, so as to facilitate the setting of the reinforcing plate 83 at the corresponding dovetail position, and on the other hand, the plate 82 is arranged inside the bottom plate 21, which not only enhances the structural thickness at the dovetail and ensures the structural strength; and it is located inside the arm, which does not affect the appearance. The plate and the reinforcing plate work together to effectively improve the structural strength of the weld at the dovetail.

[0042] like Figure 4 As shown, the end of the dovetail is located on the angle bisector of the V-shaped structure, so that the arrangement position of the reinforcement plate is reasonable and uniform force is ensured.

[0043] like Figure 4 As shown, a through hole 811 is provided in the middle of the support plate, and the support plate plays a supporting role, which can effectively support the plate 82, the reinforcing plate 83 and the bottom plate 21, and share the stress for the plate 82 and the reinforcing plate 83. The provision of the through hole 811 facilitates the release of the stress generated after the reinforcement ribs are welded.

[0044] Embodiment 2

[0045] In a typical embodiment of the present invention, reference is made to Figure 2-Figure 4 As shown, an excavator is equipped with a boom with an internal reinforcing rib structure as described in Example 1. By arranging the reinforcing ribs of Example 1 inside the boom, the weld strength of the dovetail end welding part of the ear plate is strengthened to prevent the boom from cracking at the ear plate.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A boom with an internal reinforcement structure, characterized in that: It includes a boom body, which is composed of a U-shaped plate and a connecting plate. A pair of ear plates are provided on the outer side of the bottom plate of the U-shaped plate for connecting the bucket cylinder. A central axis seat is connected between the two side plates of the U-shaped plate for hinged connection with the boom. A reinforcing rib is provided inside the boom, a first end of the reinforcing rib is fixedly connected to the central axis seat, and a second end extends to the bottom plate of the U-shaped plate and is welded and fixed. The second end of the reinforcing rib is bent to form a V-shaped structure, and the V-shaped structure and the dovetail part of the ear plate are arranged on both sides of the bottom plate of the U-shaped plate correspondingly.

2. The arm with internal reinforcement structure according to claim 1, characterized in that: The reinforcing ribs are composed of a supporting plate, a pasting plate and a reinforcing plate connected in sequence, and a V-shaped structure is formed by bending the reinforcing plate.

3. The arm with internal reinforcement structure according to claim 2, characterized in that: One end of the support plate is welded to the central axis seat, and the other end is welded to the bottom plate of the U-shaped plate.

4. The arm with internal reinforcement structure according to claim 3, characterized in that: The pasting plate is arranged in close contact with the bottom plate of the U-shaped plate, and its two side edges close to the supporting plate and the reinforcing plate are welded to the bottom plate of the U-shaped plate.

5. The arm with internal reinforcement structure according to claim 2, characterized in that: The V-shaped structure formed by the reinforcing plate has an included angle of 60°, and the reinforcing plate is welded to the bottom plate of the U-shaped plate to form a triangular support structure.

6. The arm with internal reinforcement structure according to claim 5, characterized in that: Both ends of the reinforcing plate are welded to the bottom plate of the U-shaped plate, and the interior thereof presents a triangular cavity structure, and the end of the dovetail is located on the angle bisector of the V-shaped structure.

7. The arm with internal reinforcement structure according to claim 2, characterized in that: The included angle between the support plate and the bottom plate of the U-shaped plate is an acute angle, and the included angle between the support plate and the pasting plate is an obtuse angle.

8. The arm with internal reinforcement structure according to claim 7, characterized in that: A through hole is provided at the middle position of the support plate.

9. The arm with internal reinforcement structure according to claim 1, characterized in that: The two side edges of the reinforcing rib are welded to the two side plates of the U-shaped plate.

10. An excavator, characterized in that: The excavator is equipped with a boom with an internal reinforcement rib structure as described in any one of claims 1 to 9.

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