CN210946934U - Excavator and three-hinge-point backhoe movable arm thereof - Google Patents
Excavator and three-hinge-point backhoe movable arm thereof Download PDFInfo
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- CN210946934U CN210946934U CN201921476706.XU CN201921476706U CN210946934U CN 210946934 U CN210946934 U CN 210946934U CN 201921476706 U CN201921476706 U CN 201921476706U CN 210946934 U CN210946934 U CN 210946934U
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Abstract
The utility model discloses an excavator and a three-hinge-point backhoe movable arm thereof, wherein the three-hinge-point backhoe movable arm comprises a movable arm box body structure and a movable arm ear plate casting, and the movable arm box body structure comprises a movable arm root casting, a movable arm front fork assembly, a closing plate component and a side plate component; the movable arm ear plate casting is positioned right above the movable arm box body structure. The three-hinge-point backhoe movable arm only has three hinged parts, namely a movable arm root casting, a movable arm front fork assembly and a movable arm ear plate casting, so that the movable arm ear plate casting is hinged with the bucket rod oil cylinder and the movable arm oil cylinder. The utility model discloses cancel well supporting component, to the integrated otic placode foundry goods of well supporting component's function, simplified swing arm structure, improved the reliability of swing arm, prolonged the life of swing arm.
Description
Technical Field
The utility model relates to a three hinge point backhoe swing arms and excavator belongs to excavator technical field.
Background
The movable arm is the most important structural part of the excavator and is also the structural part which is most easy to crack and has other quality problems. The traditional backhoe movable arm is composed of a root casting, a front fork assembly, an upper sealing plate, a lower sealing plate, a left front side plate, a left rear side plate, a right front side plate, a right rear side plate, an ear plate assembly and a middle support assembly, and due to the reasons that the structure of the middle support assembly of the movable arm is complex, a plurality of middle support welding seams exist, the distance between the middle support hinge point and the ear plate hinge point is very close, and the stress of the middle support assembly of the movable arm and the ear plate assembly is only born by the left side plate and the right side plate, the middle support of the movable arm, the middle support welding seams, the left side plate and the right side plate near the middle support and the like are cracked frequently caused. Although the strength of the middle support and the welding seam thereof can be increased by reinforcing and reinforcing, the crack position is spread to the peripheral position after reinforcing.
Disclosure of Invention
In order thoroughly to solve among the backhoe movable arm the problem that the region ftractures easily between support and welding seam, well supporting hinge point and the otic placode hinge point, the utility model provides a three hinge point backhoe movable arm, the utility model discloses the movable arm has abandoned well supporting component, and the function that will well supporting component is integrated to on the movable arm otic placode foundry goods. With the elimination of the middle support assembly, the quality problems caused by the middle support assembly are also thoroughly solved.
In order to realize the purpose, the utility model discloses a technical scheme is:
a three-pivot backhoe boom comprising:
the movable arm box structure comprises a movable arm root casting, a movable arm front fork assembly, a sealing plate component and a side plate component;
the movable arm ear plate casting is positioned right above the movable arm box body structure;
the three-hinge-point backhoe movable arm only has three hinged parts, namely a movable arm root casting, a movable arm front fork assembly and a movable arm ear plate casting, so that the movable arm ear plate casting is hinged with the bucket rod oil cylinder and the movable arm oil cylinder.
Further, the closing plate component comprises an upper closing plate and a lower closing plate; the movable arm ear plate casting is an integral casting which is fixedly connected to the upper sealing plate.
Further, the side panel part comprises a left front side panel, a left rear side panel, a right front side panel and a right rear side panel; the upper sealing plate is fixedly connected with the left front side plate, the left rear side plate, the right front side plate and the right rear side plate respectively; the lower sealing plate is fixedly connected with the left front side plate, the left rear side plate, the right front side plate and the right rear side plate respectively.
Furthermore, one end of the movable arm root casting is connected with the sealing plate part and the side plate part, and the other end of the movable arm root casting is hinged with the rotary table; one end of the movable arm front fork assembly is connected with the sealing plate component and the side plate component, and the other end of the movable arm front fork assembly is hinged with the bucket rod.
Furthermore, the middle part of the movable arm ear plate casting is hinged with the bucket rod oil cylinder, and the left side and the right side of the movable arm ear plate casting are respectively hinged with the left movable arm oil cylinder and the right movable arm oil cylinder.
An excavator comprises a rotary table, a bucket rod oil cylinder, a left movable arm oil cylinder, a right movable arm oil cylinder and a three-hinge-point backhoe movable arm;
wherein, three hinge point backhoe movable arms include:
the movable arm box structure comprises a movable arm root casting, a movable arm front fork assembly, a sealing plate component and a side plate component;
the movable arm ear plate casting is positioned right above the movable arm box body structure;
the three-hinge-point backhoe movable arm only has three hinged parts, namely a movable arm root casting, a movable arm front fork assembly and a movable arm ear plate casting, so that the movable arm ear plate casting is hinged with the bucket rod oil cylinder and is also hinged with the left movable arm oil cylinder and the right movable arm oil cylinder;
the left and right movable arm oil cylinders are hinged with the upper hinge point of the rotary table; the movable arm root casting is hinged with a hinge point at the lower part of the rotary table, and the movable arm front fork assembly is hinged with the bucket rod.
Furthermore, the middle part of the movable arm ear plate casting is hinged with the bucket rod oil cylinder, the left side of the movable arm ear plate casting is hinged with the left movable arm oil cylinder, and the right side of the movable arm ear plate casting is hinged with the right movable arm oil cylinder.
Further, the closing plate component comprises an upper closing plate and a lower closing plate; the movable arm ear plate casting is an integral casting which is fixedly connected to the upper sealing plate.
Further, the side panel part comprises a left front side panel, a left rear side panel, a right front side panel and a right rear side panel; the upper sealing plate is fixedly connected with the left front side plate, the left rear side plate, the right front side plate and the right rear side plate respectively; the lower sealing plate is fixedly connected with the left front side plate, the left rear side plate, the right front side plate and the right rear side plate respectively; the movable arm root casting is respectively connected with the upper sealing plate, the lower sealing plate, the left rear side plate and the right rear side plate; the movable arm front fork assembly is respectively connected with the upper sealing plate, the lower sealing plate, the left front side plate and the right front side plate.
The utility model discloses beneficial effect:
after the middle support assembly is removed, the hidden danger of cracking of the middle support assembly and the surrounding welding seams and structures of the middle support assembly disappears; because the structure of the lug plate part is an integral casting which has strong tensile, compression, bending, torsion and shearing resistance, the reliability and the service life of the lug plate part are greatly increased; the movable arm oil cylinder and the bucket rod oil cylinder mainly affect the lug plate casting, and the influence on the movable arm box body is small, so that the movable arm box body is further protected.
To sum up, the utility model discloses a backhoe swing arm structure is more succinct for traditional swing arm, and the quality problem hidden danger is eliminated for traditional swing arm basically, and the structure reliability is for traditional swing arm greatly increased, and swing arm life lengthens greatly for traditional swing arm.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. The present invention will be described in detail with reference to the accompanying drawings and examples.
FIG. 1 is a schematic view of the construction of a three-pivot backhoe boom of the present invention;
FIG. 2 is a first schematic view of an ear plate casting of the boom of the present invention;
FIG. 3 is a schematic view of a second ear plate casting of the movable arm of the present invention;
fig. 4 is a schematic view of the excavator of the present invention.
In the figure: 1. the three-hinge-point backhoe comprises a three-hinge-point backhoe movable arm, 2, a rotary table, 3, an arm, 4, an arm cylinder, 5, a left movable arm cylinder, 6, a right movable arm cylinder, 11, a movable arm root casting, 12, a movable arm front fork assembly, 13, an upper sealing plate, 14, a lower sealing plate, 15, a left front side plate, 16, a left rear side plate, 17, a right front side plate, 18, a right rear side plate, 19 and a movable arm lug plate casting.
Detailed Description
In order to make the purpose, technical solution and advantages of the present invention clearer, the following will combine the drawings in the embodiments of the present invention to perform more detailed description on the technical solution in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in FIG. 1, a three-pivot backhoe boom comprises a boom box structure and a boom ear plate casting 19; the movable arm box structure comprises a movable arm root casting 11, a movable arm front fork assembly 12, a sealing plate component and a side plate component; the movable arm ear plate casting 19 is positioned right above the movable arm box body structure; wherein, the movable arm ear plate casting 19 is hinged with the bucket rod oil cylinder and the left and right movable arm oil cylinders.
With continued reference to figure 1, the closure plate assembly includes an upper closure plate 13 and a lower closure plate 14; the side plate members include a left front side plate 15, a left rear side plate 16, a right front side plate 17, and a right rear side plate 18.
The movable arm root casting 11 is respectively connected with an upper sealing plate 13, a lower sealing plate 14, a left rear side plate 16 and a right rear side plate 18 through V-shaped groove welding seams.
The movable arm front fork assembly 12 is respectively connected with an upper sealing plate 13, a lower sealing plate 14, a left front side plate 15 and a right front side plate 17 through V-shaped groove welding seams.
The upper sealing plate 13 is connected to a left front side plate 15, a left rear side plate 16, a right front side plate 17, and a right rear side plate 18 through V-groove welds and fillet welds, respectively.
The lower closing plate 14 is connected to a left front side plate 15, a left rear side plate 16, a right front side plate 17, and a right rear side plate 18 through V-groove welds and fillet welds, respectively.
The left front side plate 15 and the left rear side plate 16 are connected by a double-V groove weld.
The right front side plate 17 and the right rear side plate 18 are connected by a double-V groove weld.
The lug plate casting 19 is connected with the upper closing plate 13 through a V-shaped groove welding seam and a fillet welding seam.
As shown in fig. 2 and 3, the movable arm ear plate casting 19 of the present invention is a one-piece casting, and the hinge portion and the connecting portion have very high strength redundancy, and have very strong tensile, compressive, bending, torsion and shear resistances, so that the ear plate casting can sufficiently bear the acting force from various directions and forms.
A preferred application of the three-pivot backhoe arm described above is as follows:
as shown in fig. 4, the excavator comprises a three-hinge-point backhoe boom 1, a rotary table 2, an arm 3, an arm cylinder 4, a left boom cylinder 5 and a right boom cylinder 6.
The three-hinge-point backhoe movable arm 1 comprises a movable arm box structure and a movable arm ear plate casting 19; the movable arm box structure comprises a movable arm root casting 11, a movable arm front fork assembly 12, a sealing plate component and a side plate component; the boom lug casting 19 is located directly above the boom box structure.
The movable arm root casting 11 is hinged with a hinge point at the lower part of the rotary table 2, the movable arm front fork assembly 12 is hinged with the bucket rod 3, the middle part of the movable arm ear plate casting 19 is hinged with the bucket rod oil cylinder 4, the left side of the movable arm ear plate casting 19 is hinged with the left movable arm oil cylinder 5, the right side of the movable arm ear plate casting 19 is hinged with the right movable arm oil cylinder 6, and the left movable arm oil cylinder 5 and the right movable arm oil cylinder 6 are further hinged with a hinge point at the upper part of the rotary table 2.
It should be noted that the above embodiment is only one embodiment for realizing the boom structure of the present invention, and there are other various embodiments, for example:
the upper sealing plate is divided into a front upper sealing plate, a middle upper sealing plate and a rear upper sealing plate, the ear plate casting and the middle upper sealing plate are integrated into a whole as a whole casting, the ear plate casting and the left rear side plate are connected through a V-shaped groove weld and a fillet weld, the ear plate casting and the right rear side plate are connected through a V-shaped groove weld and a fillet weld, the ear plate casting and the front upper sealing plate are connected through a V-shaped groove weld, and the ear plate casting and the rear upper sealing plate are connected through a V-shaped groove weld.
In conclusion, the backhoe movable arm cancels the middle supporting hinge point, so that the backhoe movable arm only has the root hinge point, the front fork hinge point and the ear plate hinge point, and the ear plate hinge point has the function of the middle supporting hinge point. In particular, the backhoe boom is not provided with the middle support assembly, and the structure of the hinge point position of the lug plate is provided as an integral casting, so that the function of the middle support assembly is integrated on the lug plate casting. After the middle support assembly is removed, the hidden danger of cracking of the middle support assembly and the surrounding welding seams and structures of the middle support assembly disappears; because the structure of the lug plate part is an integral casting which has strong tensile, compression, bending, torsion and shearing resistance, the reliability and the service life of the lug plate part are greatly increased; the movable arm oil cylinder and the bucket rod oil cylinder mainly affect the lug plate casting, and the influence on the movable arm box body structure is small, so that the movable arm box body structure is further protected. Finally, the overall reliability of the movable arm of the backhoe is greatly improved, and the service life is greatly prolonged.
In the description of the present application, it should be understood that the terms "left", "right", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the components to be referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the scope of the present invention.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
For example, to balance the high strength of the lug plate casting relative to the rest of the boom, various forms of reinforcement of the upper seal plate, left and right rear side plates are provided at a location closer to the lug plate casting.
To sum up, the utility model discloses a three hinge point swing arms unite two into one the otic placode hinge point and the well supporting hinge point of traditional swing arm, and on the otic placode foundry goods had been integrated to supporting component's function in the swing arm of tradition, so, thoroughly abandoned well supporting hinge point, the quality hidden danger that the supporting component caused in will simultaneously also eradicates in the lump. The utility model discloses a three-hinged-point movable arm otic placode foundry goods is a high strength whole foundry goods, can be competent at the dipper hydro-cylinder completely and control the effort of various forms and size that the movable arm hydro-cylinder applyed to it. Therefore, the three-hinge-point backhoe movable arm provided with the integral casting is greatly improved in reliability and greatly prolonged in service life.
Claims (10)
1. A three-pivot backhoe boom, comprising:
the movable arm box structure comprises a movable arm root casting, a movable arm front fork assembly, a sealing plate component and a side plate component;
the movable arm ear plate casting is positioned right above the movable arm box body structure;
the three-hinge-point backhoe movable arm only has three hinged parts, namely a movable arm root casting, a movable arm front fork assembly and a movable arm ear plate casting, so that the movable arm ear plate casting is hinged with the bucket rod oil cylinder and the movable arm oil cylinder.
2. A three-pivot backhoe boom as in claim 1, wherein:
the sealing plate component comprises an upper sealing plate and a lower sealing plate;
the movable arm ear plate casting is an integral casting which is fixedly connected to the upper sealing plate.
3. A three-pivot backhoe boom as in claim 2 wherein:
the side plate component comprises a left front side plate, a left rear side plate, a right front side plate and a right rear side plate;
the upper sealing plate is fixedly connected with the left front side plate, the left rear side plate, the right front side plate and the right rear side plate respectively;
the lower sealing plate is fixedly connected with the left front side plate, the left rear side plate, the right front side plate and the right rear side plate respectively.
4. A three-pivot backhoe boom as in claim 1, wherein:
one end of the movable arm root casting is connected with the sealing plate part and the side plate part, and the other end of the movable arm root casting is hinged with the rotary table;
one end of the movable arm front fork assembly is connected with the sealing plate component and the side plate component, and the other end of the movable arm front fork assembly is hinged with the bucket rod.
5. A three-pivot backhoe boom as in claim 1, wherein:
the middle part of the movable arm ear plate casting is hinged with the bucket rod oil cylinder, and the left side and the right side of the movable arm ear plate casting are respectively hinged with the left movable arm oil cylinder and the right movable arm oil cylinder.
6. An excavator, characterized in that:
the rotary table comprises a rotary table, a bucket rod oil cylinder, a left movable arm oil cylinder, a right movable arm oil cylinder and a three-hinge-point backhoe movable arm;
wherein, three hinge point backhoe movable arms include:
the movable arm box structure comprises a movable arm root casting, a movable arm front fork assembly, a sealing plate component and a side plate component;
the movable arm ear plate casting is positioned right above the movable arm box body structure;
the three-hinge-point backhoe movable arm only has three hinged parts, namely a movable arm root casting, a movable arm front fork assembly and a movable arm ear plate casting, so that the movable arm ear plate casting is hinged with the bucket rod oil cylinder and is also hinged with the left movable arm oil cylinder and the right movable arm oil cylinder;
the left and right movable arm oil cylinders are hinged with the upper hinge point of the rotary table; the movable arm root casting is hinged with a hinge point at the lower part of the rotary table, and the movable arm front fork assembly is hinged with the bucket rod.
7. The excavator of claim 6 wherein:
the middle part of the movable arm ear plate casting is hinged with the bucket rod oil cylinder, the left side of the movable arm ear plate casting is hinged with the left movable arm oil cylinder, and the right side of the movable arm ear plate casting is hinged with the right movable arm oil cylinder.
8. The excavator of claim 6 wherein:
the sealing plate component comprises an upper sealing plate and a lower sealing plate;
the movable arm ear plate casting is an integral casting which is fixedly connected to the upper sealing plate.
9. The excavator of claim 8 wherein:
the side plate component comprises a left front side plate, a left rear side plate, a right front side plate and a right rear side plate;
the upper sealing plate is fixedly connected with the left front side plate, the left rear side plate, the right front side plate and the right rear side plate respectively;
the lower sealing plate is fixedly connected with the left front side plate, the left rear side plate, the right front side plate and the right rear side plate respectively.
10. The excavator of claim 9 wherein:
the movable arm root casting is respectively connected with the upper sealing plate, the lower sealing plate, the left rear side plate and the right rear side plate;
the movable arm front fork assembly is respectively connected with the upper sealing plate, the lower sealing plate, the left front side plate and the right front side plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921476706.XU CN210946934U (en) | 2019-09-06 | 2019-09-06 | Excavator and three-hinge-point backhoe movable arm thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921476706.XU CN210946934U (en) | 2019-09-06 | 2019-09-06 | Excavator and three-hinge-point backhoe movable arm thereof |
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| CN210946934U true CN210946934U (en) | 2020-07-07 |
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| CN201921476706.XU Active CN210946934U (en) | 2019-09-06 | 2019-09-06 | Excavator and three-hinge-point backhoe movable arm thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439046A (en) * | 2019-09-06 | 2019-11-12 | 徐州徐工矿业机械有限公司 | A kind of tri-joint mechanism backhoe swing arm, excavator and the method for improving backhoe swing arm reliability |
| WO2023049428A1 (en) * | 2021-09-27 | 2023-03-30 | Caterpillar Inc. | Boom assembly |
-
2019
- 2019-09-06 CN CN201921476706.XU patent/CN210946934U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439046A (en) * | 2019-09-06 | 2019-11-12 | 徐州徐工矿业机械有限公司 | A kind of tri-joint mechanism backhoe swing arm, excavator and the method for improving backhoe swing arm reliability |
| WO2023049428A1 (en) * | 2021-09-27 | 2023-03-30 | Caterpillar Inc. | Boom assembly |
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