CN209941765U - Front shovel bucket rod and front shovel excavator - Google Patents
Front shovel bucket rod and front shovel excavator Download PDFInfo
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- CN209941765U CN209941765U CN201920558141.3U CN201920558141U CN209941765U CN 209941765 U CN209941765 U CN 209941765U CN 201920558141 U CN201920558141 U CN 201920558141U CN 209941765 U CN209941765 U CN 209941765U
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Abstract
The utility model discloses a positive bucket rod and a positive shovel excavator, wherein the positive bucket rod comprises a left box body, a right box body and a middle box body; the left box body and the right box body are completely symmetrical about the left central plane and the right central plane, and the middle box body is completely symmetrical about the left central plane and the right central plane; the left box body is divided into a plurality of small box bodies I through at least one rib plate, the right box body is divided into a plurality of small box bodies II through at least one rib plate, and the middle box body is divided into a plurality of small box bodies III through at least one rib plate; a plurality of small box bodies I, a plurality of small box bodies II and a plurality of small box bodies III are distributed in an array mode in the front-back direction and the left-right direction, and therefore a large rigid integral structure is formed together. The utility model discloses a dipper structure comprises a plurality of little casings, has greatly improved the fatigue life of dipper.
Description
Technical Field
The utility model relates to a positive scraper bowl pole structure belongs to excavator technical field.
Background
The dipper is one of the most critical structure of excavator, also is the structure that the excavator is the easiest fracture and open welding, and traditional excavator dipper comprises a whole big box structure, and its simple structure, bulk strength is lower, and life is shorter. The traditional bucket rod is only suitable for the light earth-carrying working condition with low material density, and if the traditional bucket rod is under the severe working conditions such as rocks, the traditional bucket rod is easy to crack and open the welding and other failure phenomena.
Disclosure of Invention
In order to solve the problem that the reliability is low when traditional dipper uses under abominable operating mode, the utility model provides a novel positive scraper bowl pole structure of excavator, greatly increased the structural strength of dipper, prolonged the life of dipper under abominable operating mode.
In order to realize the purpose, the utility model discloses a technical scheme is:
the front bucket rod comprises a left box body, a right box body and a middle box body; the left box body and the right box body are completely symmetrical about a left central plane and a right central plane, and the middle box body is completely symmetrical about the left central plane and the right central plane; the left box body is divided into a plurality of small box bodies I through at least one rib plate, the right box body is divided into a plurality of small box bodies II through at least one rib plate, and the middle box body is divided into a plurality of small box bodies III through at least one rib plate; a plurality of small box bodies I, a plurality of small box bodies II and a plurality of small box bodies III are distributed in an array mode in the front-back direction and the left-right direction, and therefore a large rigid integral structure is formed together.
Further, the left box body comprises a left front inner rib plate and a left rear inner rib plate, wherein the left box body is divided into a front small box body I, a middle small box body II and a rear small box body I by the left front inner rib plate and the left rear inner rib plate; the right box body comprises a right front inner rib plate and a right rear inner rib plate, wherein the right box body is divided into a front small box body II, a middle small box body II and a rear small box body II by the right front inner rib plate and the right rear inner rib plate; the middle box body comprises a middle front inner rib plate and a middle rear inner rib plate, wherein the middle front inner rib plate and the middle rear inner rib plate divide the middle box body into a front small box body III, a middle small box body III and a rear small box body III.
Further, the directions of the left front inner rib plate, the right front inner rib plate and the middle front inner rib plate are completely consistent; the directions of the left rear inner rib plate, the right rear inner rib plate and the middle rear inner rib plate are completely consistent.
Further, the left box body also comprises a left front side plate, a left rear side plate, a left front two side plates, a left rear two side plates, a left front casting, a left upper sealing plate, a left rear sealing plate and a left lower sealing plate; the left front side plate and the left rear side plate are connected through an X-shaped welding seam; the left front two side plates and the left rear two side plates are connected through X-shaped welding seams; the left front side plate, the left rear side plate, the left front casting, the left upper sealing plate, the left rear sealing plate and the left lower sealing plate are connected through single-sided V-shaped welding seams; the left front two side plates, the left rear two side plates, the left front casting, the left upper sealing plate, the left rear sealing plate and the left lower sealing plate are connected through single-sided V-shaped welding lines; the rib plates are connected with the left front side plate, the left front two side plates, the left upper sealing plate and the left lower sealing plate through fillet welds.
Further, the left front two side plates, the left front inner rib plate and the left rear inner rib plate are all provided with fabrication holes for realizing interconnection and intercommunication of the left box body and the middle box body; and a process hole is formed in the front left side plate and used for realizing interconnection and intercommunication between the outside and the left box body.
Further, the right box body also comprises a right front side plate, a right rear side plate, a right front two side plate, a right rear two side plate, a right front casting, a right upper sealing plate, a right rear sealing plate and a right lower sealing plate; the right front side plate and the right rear side plate are connected through an X-shaped welding seam; the right front two side plates and the right rear two side plates are connected through X-shaped welding seams; the right front side plate, the right rear side plate, the right front casting, the right upper sealing plate, the right rear sealing plate and the right lower sealing plate are connected through single-sided V-shaped welding seams; the right front two side plate, the right rear two side plate, the right front casting, the right upper sealing plate, the right rear sealing plate and the right lower sealing plate are connected through single-sided V-shaped welding lines; the rib plates are connected with the right front side plate, the right upper sealing plate and the right lower sealing plate through fillet welds.
Further, the right front two side plates, the right front inner rib plate and the right rear inner rib plate are all provided with process holes for realizing interconnection and intercommunication between the right box body and the middle box body; and a process hole is formed in the right front side plate and used for realizing interconnection and intercommunication between the outside and the right box body.
Furthermore, the middle box body also comprises a middle front seal plate, a middle upper seal plate, a middle rear lower seal plate, a middle casting, a middle front lower seal plate, a left front two side plates and a left rear two side plates which are shared with the left box body, and a right front two side plates and a right rear two side plates which are shared with the right box body; the outer parts of the left front two side plates, the left rear two side plates, the middle front sealing plate, the middle upper sealing plate, the middle rear lower sealing plate, the middle casting and the middle front lower sealing plate are connected through single-sided V-shaped welding lines;
the right front two side plates, the right rear two side plates, the middle front sealing plate, the middle upper sealing plate, the middle rear lower sealing plate, the middle casting and the middle front lower sealing plate are externally connected through single-sided V-shaped welding seams; the rib plates are connected with the left front two side plates, the right front two side plates, the middle upper sealing plate and the middle casting through fillet welds.
Furthermore, the middle front inner rib plate and the middle rear inner rib plate are provided with fabrication holes for realizing interconnection and intercommunication among the small box bodies III.
A face shovel having the aforementioned face shovel shaft.
The utility model discloses beneficial effect:
the front dipper stick is composed of nine small boxes, and the nine small boxes are distributed in an array manner in the front-back direction and the left-right direction. The nine small box bodies jointly form a large rigid integral structure, so that the load of any small box body in any direction can be quickly transmitted to other small box bodies, and the nine small box bodies jointly bear the alternating load on the bucket rod, so that the multi-box structure greatly increases the integral strength of the positive bucket rod, and simultaneously increases the torsion resistance and the bending resistance of the positive bucket rod, and the service life of the positive bucket rod under severe working conditions is directly greatly prolonged; meanwhile, the process holes formed in the inner side plate and the inner rib plate can obviously reduce the stress at the welding seam of the bucket rod, so that the stress at each position of the bucket rod is more balanced, and the fatigue life of the bucket rod is further prolonged.
Drawings
FIG. 1 is a first schematic view of the bucket rod box body tailor-welding of the present invention;
FIG. 2 is a second schematic view of the bucket rod box body tailor-welding of the present invention;
FIG. 3 is a cross-sectional view of the left box of the present invention;
FIG. 4 is a cross-sectional view of the right box of the present invention;
FIG. 5 is a cross-sectional view of the middle box body of the present invention;
FIG. 6 is a first final structure diagram of the bucket arm of the present invention;
fig. 7 is a final structure diagram of the bucket rod of the present invention.
In the figure: 1. the box body comprises a left box body, a right box body, a 3 box body, a middle box body, a 101 box body, a front side plate, a 102 box body, a left back side plate, a 103 box body, a left front side plate, a 104 box body, a left back side plate, a 105 box body, a left front casting, a 106 box body, a left upper sealing plate, a 107 box body, a left back sealing plate, a 108 box body, a left lower sealing plate, a 109 box body, a left front inner rib plate, a 110 box body, a left back inner rib plate, a 111 box body, a left craft plate, a 201 box body, a right front side plate, a 202 box body, a right back side plate, a 203 box body, a right front side plate, a 204 box body, a right back side plate, a right front casting, a 206 box body, a right upper sealing plate, a 207 box body, a right back sealing plate, a 208 box body, a right lower sealing plate, a 209 box body, a right front inner rib plate, a right back inner rib plate, a 210, a right back inner rib.
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 elements or elements 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.
In fig. 1 and 2, the utility model discloses a positive scraper bowl pole structure, including left box 1, right box 2 and middle box 3.
In fig. 1, 2 and 3, the left box 1 is composed of a left front side plate 101, a left rear side plate 102, a left front side plate 103, a left rear side plate 104, a left front casting 105, a left upper sealing plate 106, a left rear sealing plate 107, a left lower sealing plate 108, a left front inner rib plate 109 and a left rear inner rib plate 110. The left box body 1 is divided into three small box bodies of front, middle and rear by a left front inner rib plate 109 and a left rear inner rib plate 110.
The left front side plate 101 and the left rear side plate 102 are connected by an X-shaped weld; the left front two side plates 103 and the left rear two side plates 104 are connected by X-shaped welding seams; the left front casting 105, the left upper sealing plate 106, the left rear sealing plate 107 and the left lower sealing plate 108 are connected with each other through V-shaped welding seams; the left front side plate 101, the left rear side plate 102, the left front casting 105, the left upper sealing plate 106, the left rear sealing plate 107 and the left lower sealing plate 108 are connected through single-sided V-shaped welding seams at the outer part and connected through fillet welding seams at the inner part; the left front two side plates 103, the left rear two side plates 104, the left front casting 105, the left upper sealing plate 106, the left rear sealing plate 107 and the left lower sealing plate 108 are connected through single-sided V-shaped welding seams on the outer part and connected through fillet welding seams on the inner part; the left front inner rib plate 109 and the left rear inner rib plate 110 are connected with the left front side plate 101, the left front side plate 103, the left upper sealing plate 106 and the left lower sealing plate 108 through fillet welds.
In fig. 1, 2 and 4, the right box body 2 is composed of a right front side plate 201, a right rear side plate 202, a right front side plate 203, a right rear side plate 204, a right front casting 205, a right upper sealing plate 206, a right rear sealing plate 207, a right lower sealing plate 208, a right front inner rib plate 209 and a right rear inner rib plate 210. The right box body 2 is divided into three small box bodies in front, middle and rear by a right front inner rib plate 209 and a right rear inner rib plate 210.
The right front side plate 201 and the right rear side plate 202 are connected through an X-shaped weld; the right front second side plate 203 and the right rear second side plate 204 are connected by an X-shaped weld; a right front casting 205, a right upper sealing plate 206, a right rear sealing plate 207 and a right lower sealing plate 208, wherein adjacent plates or castings are connected through a V-shaped welding line; the right front side plate 201, the right rear side plate 202, the right front casting 205, the right upper sealing plate 206, the right rear sealing plate 207 and the right lower sealing plate 208 are connected through single-sided V-shaped welding seams at the outer part and connected through fillet welding seams at the inner part; the right front two side plate 203, the right rear two side plate 204, the right front casting 205, the right upper sealing plate 206, the right rear sealing plate 207 and the right lower sealing plate 208 are connected through single-sided V-shaped welding seams at the outer part and connected through fillet welding seams at the inner part; the right front inner rib plate 209, the right rear inner rib plate 210, the right front side plate 201, the right front second side plate 203, the right upper sealing plate 206 and the right lower sealing plate 208 are connected through fillet welds.
In fig. 1, 2 and 5, the middle box body 3 is composed of a left front two side plate 103, a left rear two side plate 104, a right front two side plate 203, a right rear two side plate 204, a middle front closing plate 301, an upper middle closing plate 302, a middle rear closing plate 303, a middle rear lower closing plate 304, a middle casting 305, a middle front lower closing plate 306, a middle front inner rib 307 and a middle rear inner rib 308. The middle box body 3 is divided into three small box bodies of front, middle and rear by a middle front inner rib plate 307 and a middle rear inner rib plate 308.
The middle front seal plate 301, the middle upper seal plate 302, the middle rear seal plate 303, the middle rear lower seal plate 304, the middle casting 305 and the middle front lower seal plate 306 are connected with each other through a V-shaped weld joint; the left front two side plates 103, the left rear two side plates 104, the middle front seal plate 301, the middle upper seal plate 302, the middle rear seal plate 303, the middle rear lower seal plate 304, the middle casting 305 and the middle front lower seal plate 306 are connected through single-sided V-shaped welding seams at the outer part and connected through fillet welding seams at the inner part; the right front two side plate 203, the right rear two side plate 204, the middle front seal plate 301, the middle upper seal plate 302, the middle rear seal plate 303, the middle rear lower seal plate 304, the middle casting 305 and the middle front lower seal plate 306 are connected through single-sided V-shaped welding seams at the outer part and connected through fillet welding seams at the inner part; the middle front inner rib plate 307, the middle rear inner rib plate 308, the left front two side plates 103, the right front two side plates 203, the middle upper sealing plate 302 and the middle casting 305 are connected through fillet welds.
The left casing 1 and the middle casing 3 share a left front side plate 103 and a left rear side plate 104, and the right casing 2 and the middle casing 3 share a right front side plate 203 and a right rear side plate 204.
In fig. 1 and 2, the bucket rod structure of the present invention is composed of nine small boxes. The left casing 1 and the right casing 2 are completely symmetrical about the left and right central planes, and the middle casing 3 itself is completely symmetrical about the left and right central planes. The directions of the left front inner rib plate 109, the right front inner rib plate 209 and the middle front inner rib plate 307 are completely consistent; the directions of the left rear inner rib plate 110, the right rear inner rib plate 210 and the middle rear inner rib plate 308 are completely consistent; the left upper cover plate 106, the right upper cover plate 206 and the middle upper cover plate 302 are oriented in the same direction.
In fig. 1 and fig. 2, the left front two side plates 103, the right front two side plates 203, the left front inner rib plate 109, the left rear inner rib plate 110, the right front inner rib plate 209, the right rear inner rib plate 210, the middle front inner rib plate 307, the middle rear inner rib plate 308 are all provided with fabrication holes, and the utility model discloses nine little boxes of dipper structure can be through the intercommunication of these fabrication holes.
In fig. 1 and 2, the left front side plate 101 and the right front side plate 201 are provided with process holes, and the process holes of the left front side plate 101, the right front side plate 201, the left front side plate 103 and the right front side plate 203 are concentric with each other. During welding, a welder can enter the left box body 1 or the right box body 2 through the fabrication holes in the left front side plate 101 or the right front side plate 201 to weld, and then enter all the small box bodies of the bucket rod to weld through the left front side plate 103, the right front side plate 203, the left front inner rib plate 109, the left rear inner rib plate 110, the right front inner rib plate 209, the right rear inner rib plate 210, the middle front inner rib plate 307 and the middle rear inner rib plate 308.
In fig. 6, the left tooling plate 111 is attached to the tooling hole on the left front side plate 101 by a single-sided V-weld.
In fig. 7, the right tooling plate 211 is attached at the tooling hole on the right front side plate 201 by a single-sided V-weld.
It should be noted that the above embodiment is only one embodiment for realizing the bucket rod structure of the present invention, and there are other various embodiments, for example:
the left side box is further separated for 2 boxes of left and right directions by 1 curb plate, and the right side box is further separated for 2 boxes of left and right directions by 1 curb plate, and the well box is separated for 2 ~ 5 boxes of left and right directions by 1 ~ 4 curb plates.
Each box body in the left and right directions can be further divided into 2-16 box bodies in the front and back directions by 1-15 internal rib plates.
Each box body can be further divided into 2-4 box bodies in the vertical direction by 1-3 internal rib plates.
Each side plate and the inner rib plate are provided with process holes, and a welder can reach any small box body inside the positive bucket rod from the outside of the positive bucket rod through the process holes.
In the description of the present application, it is to be understood that the terms "center", "front", "center", "back", "left", "right", "upper", "lower", "inner", "outer", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, 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.
Such as these improvements: the groove weld is improved to be a composite weld of the groove weld and the fillet weld, and the process hole of the outer side plate of the bucket rod is improved to be sealed by an assembly structure from the sealing of a welding structure.
Such finishes are for example: the utility model discloses increase additional strengthening, mechanical limit structure, hoisting structure, divide native structure etc. on the basis of structure.
In summary, the front dipper stick is composed of nine small cases, and the nine small cases are distributed in an array in the front-rear and left-right directions. Because nine little boxes constitute a big rigidity overall structure jointly, the load of any direction of arbitrary little box can all transmit to other little boxes fast, bears the alternating load on the dipper jointly by nine little boxes, and the multiple box structure greatly has increased positive scraper bowl pole's bulk strength, has also increased the antitorque and the bending resistance ability of positive scraper bowl pole simultaneously, and direct expression is that positive scraper bowl pole life greatly increased under abominable operating mode.
The utility model also provides a face shovel excavator, has foretell face shovel dipper stick.
Claims (10)
1. Positive dipper pole, its characterized in that: comprises a left box body, a right box body and a middle box body; the left box body and the right box body are completely symmetrical about a left central plane and a right central plane, and the middle box body is completely symmetrical about the left central plane and the right central plane;
the left box body is divided into a plurality of small box bodies I through at least one rib plate, the right box body is divided into a plurality of small box bodies II through at least one rib plate, and the middle box body is divided into a plurality of small box bodies III through at least one rib plate;
a plurality of small box bodies I, a plurality of small box bodies II and a plurality of small box bodies III are distributed in an array mode in the front-back direction and the left-right direction, and therefore a large rigid integral structure is formed together.
2. The positive bucket bar of claim 1, wherein: the left box body comprises a left front inner rib plate and a left rear inner rib plate, wherein the left front inner rib plate and the left rear inner rib plate divide the left box body into a front small box body I, a middle small box body II and a rear small box body I;
the right box body comprises a right front inner rib plate and a right rear inner rib plate, wherein the right box body is divided into a front small box body II, a middle small box body II and a rear small box body II by the right front inner rib plate and the right rear inner rib plate;
the middle box body comprises a middle front inner rib plate and a middle rear inner rib plate, wherein the middle front inner rib plate and the middle rear inner rib plate divide the middle box body into a front small box body III, a middle small box body III and a rear small box body III.
3. The positive bucket bar of claim 2, wherein: the directions of the left front inner rib plate, the right front inner rib plate and the middle front inner rib plate are completely consistent; the directions of the left rear inner rib plate, the right rear inner rib plate and the middle rear inner rib plate are completely consistent.
4. The positive bucket bar of claim 1, wherein: the left box body also comprises a left front side plate, a left rear side plate, a left front two side plates, a left rear two side plates, a left front casting, a left upper sealing plate, a left rear sealing plate and a left lower sealing plate;
the left front side plate and the left rear side plate are connected through an X-shaped welding seam; the left front two side plates and the left rear two side plates are connected through X-shaped welding seams;
the left front side plate, the left rear side plate, the left front casting, the left upper sealing plate, the left rear sealing plate and the left lower sealing plate are connected through single-sided V-shaped welding seams;
the left front two side plates, the left rear two side plates, the left front casting, the left upper sealing plate, the left rear sealing plate and the left lower sealing plate are connected through single-sided V-shaped welding lines;
the rib plates are connected with the left front side plate, the left front two side plates, the left upper sealing plate and the left lower sealing plate through fillet welds.
5. The positive dipper handle of claim 4, wherein: the left front two side plates, the left front inner rib plate and the left rear inner rib plate are all provided with fabrication holes for realizing interconnection and intercommunication of the left box body and the middle box body;
and a process hole is formed in the front left side plate and used for realizing interconnection and intercommunication between the outside and the left box body.
6. The positive bucket bar of claim 1, wherein: the right box body also comprises a right front side plate, a right rear side plate, a right front two side plate, a right rear two side plate, a right front casting, a right upper sealing plate, a right rear sealing plate and a right lower sealing plate;
the right front side plate and the right rear side plate are connected through an X-shaped welding seam; the right front two side plates and the right rear two side plates are connected through X-shaped welding seams;
the right front side plate, the right rear side plate, the right front casting, the right upper sealing plate, the right rear sealing plate and the right lower sealing plate are connected through single-sided V-shaped welding seams;
the right front two side plate, the right rear two side plate, the right front casting, the right upper sealing plate, the right rear sealing plate and the right lower sealing plate are connected through single-sided V-shaped welding lines;
the rib plates are connected with the right front side plate, the right upper sealing plate and the right lower sealing plate through fillet welds.
7. The positive bucket lever of claim 6, wherein: the right front two side plates, the right front inner rib plate and the right rear inner rib plate are all provided with fabrication holes for realizing interconnection and intercommunication of the right box body and the middle box body;
and a process hole is formed in the right front side plate and used for realizing interconnection and intercommunication between the outside and the right box body.
8. The positive bucket bar of claim 1, wherein: the middle box body also comprises a middle front sealing plate, a middle upper sealing plate, a middle rear lower sealing plate, a middle casting, a middle front lower sealing plate, a left front two side plates and a left rear two side plates which are shared with the left box body, and a right front two side plates and a right rear two side plates which are shared with the right box body;
the outer parts of the left front two side plates, the left rear two side plates, the middle front sealing plate, the middle upper sealing plate, the middle rear lower sealing plate, the middle casting and the middle front lower sealing plate are connected through single-sided V-shaped welding lines;
the right front two side plates, the right rear two side plates, the middle front sealing plate, the middle upper sealing plate, the middle rear lower sealing plate, the middle casting and the middle front lower sealing plate are externally connected through single-sided V-shaped welding seams;
the rib plates are connected with the left front two side plates, the right front two side plates, the middle upper sealing plate and the middle casting through fillet welds.
9. The positive bucket bar of claim 2, wherein: and the middle front inner rib plate and the middle rear inner rib plate are provided with fabrication holes for realizing interconnection and intercommunication among the small box bodies III.
10. A face shovel excavator, characterized in that: a positive dipper handle as defined in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920558141.3U CN209941765U (en) | 2019-04-23 | 2019-04-23 | Front shovel bucket rod and front shovel excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920558141.3U CN209941765U (en) | 2019-04-23 | 2019-04-23 | Front shovel bucket rod and front shovel excavator |
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| Publication Number | Publication Date |
|---|---|
| CN209941765U true CN209941765U (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920558141.3U Active CN209941765U (en) | 2019-04-23 | 2019-04-23 | Front shovel bucket rod and front shovel excavator |
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| CN (1) | CN209941765U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109972675A (en) * | 2019-04-23 | 2019-07-05 | 徐州徐工矿业机械有限公司 | A kind of crowd shovel dipper and forward shovel |
-
2019
- 2019-04-23 CN CN201920558141.3U patent/CN209941765U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109972675A (en) * | 2019-04-23 | 2019-07-05 | 徐州徐工矿业机械有限公司 | A kind of crowd shovel dipper and forward shovel |
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