CN210163957U - Inner arm of excavator - Google Patents
Inner arm of excavator Download PDFInfo
- Publication number
- CN210163957U CN210163957U CN201920666956.3U CN201920666956U CN210163957U CN 210163957 U CN210163957 U CN 210163957U CN 201920666956 U CN201920666956 U CN 201920666956U CN 210163957 U CN210163957 U CN 210163957U
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- arm
- arm body
- reinforcing plate
- excavator
- plate
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Abstract
The utility model discloses an excavator inner arm is applied to the engineering machine tool field. An inner arm of an excavator comprises a front reinforcing plate, a connecting plate and an arm body reinforcing plate which are fixedly connected to an arm body in sequence, wherein the arm body penetrates through the connecting plate and extends to the front reinforcing plate; an arm body reinforcing rib is fixedly connected between the front reinforcing plate and the connecting plate; the arm body reinforcing plate, the arm body and the connecting plate form a cavity structure. The inner arm of the excavator has higher strength and longer service life.
Description
Technical Field
The utility model relates to an excavator inner arm belongs to the engineering machine tool field.
Background art:
the stress that the inner arm of excavator bore in the excavator working process is great, often leads to inner arm head fracture because of structural strength is not enough, and the life of inner arm shortens.
Disclosure of Invention
The utility model provides an excavator inner arm has higher intensity, and life is longer.
In order to achieve the above purpose, the utility model adopts the technical proposal that: an inner arm of an excavator comprises a front reinforcing plate, a connecting plate and an arm body reinforcing plate which are fixedly connected to an arm body in sequence, wherein the arm body penetrates through the connecting plate and extends to the front reinforcing plate; an arm body reinforcing rib is fixedly connected between the front reinforcing plate and the connecting plate; and a cavity structure is formed among the arm body reinforcing plate, the arm body and the connecting plate.
Preferably, the arm reinforcing plate is in a trapezoid shape with a small upper part and a large lower part when unfolded.
Preferably, the edge of the arm body is located to the arm body reinforcing plate, the bending that the edge of arm body reinforcing plate and arm body suited is the arc.
Preferably, a groove for welding the arm reinforcing plate is formed in the arm connecting plate.
Preferably, the arm reinforcing ribs are tightly attached to the arm body and fixedly connected with the arm body.
Preferably, the arm reinforcing ribs and the arm reinforcing plate are arranged correspondingly, and the arm reinforcing ribs, the connecting plate and the front reinforcing plate form a cavity structure.
Preferably, the material of the arm reinforcing plate and the arm reinforcing rib comprises a low-carbon alloy steel material.
The utility model provides an excavator inner arm, which increases the stressed cross-sectional area through the cavity structure formed between the arm body reinforcing plate and the arm body and the connecting plate, thereby strengthening the strength of the inner arm; the arm body reinforcing ribs and the arm body reinforcing plate are correspondingly arranged, and the arm body reinforcing ribs, the connecting plate and the front reinforcing plate form a cavity structure, so that the strength of the inner arm is further strengthened, the inner arm head is not easy to crack under the condition of bearing larger stress, the service life of the inner arm is prolonged, and the maintenance cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a mechanical inner arm according to an embodiment of the present invention;
FIG. 2 is a diagram showing the relationship between the reinforcing plate of the arm body and the arm body, and the connecting plate of the embodiment of the present invention;
FIG. 3 is a schematic plan view of the embodiment of the present invention showing the arm reinforcing plate after being unfolded;
FIG. 4 is a schematic view of the arm reinforcing plate after bending according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a mechanical inner arm according to a second embodiment of the present invention;
wherein: 1-front reinforcing plate, 2-connecting plate, 3-arm reinforcing rib, 4-arm body and 5-arm body reinforcing plate.
Detailed Description
For a better understanding of the nature of the present invention, its further description is provided below with reference to the following detailed description and the accompanying drawings.
Example one
The inner arm structure of the excavator is shown in figure 1 and comprises an arm body 4, a front reinforcing plate 1, a connecting plate 2 and an arm body reinforcing plate 5, wherein the arm body 4 is fixedly connected with the front reinforcing plate 1 in sequence, and the arm body penetrates through the connecting plate and extends to the front reinforcing plate 1. An arm body reinforcing rib 3 is fixedly connected between the front reinforcing plate 1 and the connecting plate 2, and the arm body reinforcing rib 3 is tightly attached to the arm body for welding.
A cavity structure (as shown in figure 2) is formed among the arm body reinforcing plate 5, the arm body 4 and the connecting plate 2, the stressed section area of the arm body is increased, and the strength of the arm body is higher.
The arm reinforcing plates 5 are formed in a trapezoidal shape having a small top and a large bottom when unfolded, as shown in fig. 3, and are provided at four corners of the arm 4. The arm reinforcing plate 5 is bent into an arc shape (as shown in fig. 4) to be adapted to the edge angle of the arm 4. A groove is formed between the arm body reinforcing plate 5 and the connecting plate 2, so that the welding penetration can be increased.
The joint of the arm body reinforcing plate 5 and the arm body 4 is subjected to fillet welding, and the corners are subjected to smooth polishing treatment. And a welding seam is reserved between the arm body reinforcing plate 5 and the connecting plate 2, and dovetail treatment is performed on the welding seam.
The arm reinforcing plate 5 and the arm reinforcing ribs 3 are made of low-carbon alloy steel Q345D.
The strength of the arm body can be measured by the moment of inertia, and the larger the moment of inertia is, the higher the strength of the arm body is. The moment of inertia of the traditional arm body without the reinforcing plate is 45.89kg2The first embodiment of the present invention provides an arm body with a rotational inertia of 50.35kg.mm2. Therefore, the utility model discloses have higher intensity, it is not fragile, guarantee the normal operating of excavator.
Example two
The inner arm structure of the excavator is shown in fig. 5 and comprises an arm body 4, a front reinforcing plate 1, a connecting plate 2 and an arm body reinforcing plate 5, wherein the arm body 4 is fixedly connected with the front reinforcing plate 1 in sequence, and the arm body penetrates through the connecting plate and extends to the front reinforcing plate 1. An arm reinforcing rib 3 is fixedly connected between the front reinforcing plate 1 and the connecting plate 2. The arm body reinforcing ribs 3 are arranged corresponding to the arm body reinforcing plates 5, and meanwhile, the arm body reinforcing ribs 3, the connecting plate 2 and the front reinforcing plate 1 form a cavity structure.
A cavity structure (as shown in figure 2) is formed among the arm body reinforcing plate 5, the arm body 4 and the connecting plate 2, the stressed section area of the arm body is increased, and the strength of the arm body is higher.
The arm reinforcing plates 5 are formed in a trapezoidal shape having a small top and a large bottom when unfolded, as shown in fig. 3, and are provided at four corners of the arm 4. The arm reinforcing plate 5 is bent into an arc shape (as shown in fig. 4) to be adapted to the edge angle of the arm 4. A groove is formed between the arm body reinforcing plate 5 and the connecting plate 2, so that the welding penetration can be increased.
The joint of the arm body reinforcing plate 5 and the arm body 4 is subjected to fillet welding, and the corners are subjected to smooth polishing treatment. And a welding seam is reserved between the arm body reinforcing plate 5 and the connecting plate 2, and dovetail treatment is performed on the welding seam.
The arm reinforcing plate 5 and the arm reinforcing ribs 3 are made of low-carbon alloy steel Q345D.
The embodiment of the utility model provides a second moment of inertia of arm body is 50.35kg.mm2Is superior to the traditional arm body.
It should be noted that, although the present invention has been described by the above embodiments, the present invention may have other various embodiments. Various modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention, and it is intended that all such modifications and changes fall within the scope of the appended claims and their equivalents.
Claims (7)
1. An inner arm of an excavator is characterized by comprising a front reinforcing plate, a connecting plate and an arm body reinforcing plate which are fixedly connected to an arm body in sequence, wherein the arm body penetrates through the connecting plate and extends to the front reinforcing plate; an arm body reinforcing rib is fixedly connected between the front reinforcing plate and the connecting plate; and a cavity structure is formed among the arm body reinforcing plate, the arm body and the connecting plate.
2. The inner arm of an excavator according to claim 1 wherein the arm reinforcing plate is in a trapezoidal shape having a small upper part and a large lower part when deployed.
3. The inner arm of the excavator as claimed in claim 1, wherein the arm body reinforcing plate is arranged at the edge of the arm body, and the bending of the arm body reinforcing plate corresponding to the edge of the arm body is arc-shaped.
4. The inner arm of the excavator as claimed in claim 1, wherein a groove is formed at the welding position of the arm body reinforcing plate and the arm body.
5. The inner arm of the excavator as claimed in claim 1, wherein the arm body reinforcing rib is tightly attached to the arm body and fixedly connected with the arm body.
6. The inner arm of the excavator according to claim 1, wherein the arm body reinforcing rib is provided corresponding to the arm body reinforcing plate, and the arm body reinforcing rib, the connecting plate and the front reinforcing plate form a cavity structure.
7. The inner arm as claimed in any one of claims 1 to 6, wherein the material of the arm reinforcing plate and the arm reinforcing rib comprises a low carbon alloy steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920666956.3U CN210163957U (en) | 2019-05-07 | 2019-05-07 | Inner arm of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920666956.3U CN210163957U (en) | 2019-05-07 | 2019-05-07 | Inner arm of excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210163957U true CN210163957U (en) | 2020-03-20 |
Family
ID=69790758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920666956.3U Active CN210163957U (en) | 2019-05-07 | 2019-05-07 | Inner arm of excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210163957U (en) |
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2019
- 2019-05-07 CN CN201920666956.3U patent/CN210163957U/en active Active
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