Electric bucket rod device

Abstract

The invention provides an electric bucket rod device which is used for connecting and supporting a bucket and comprises a first bucket rod and a second bucket rod which are arranged in parallel, the end of the first bucket rod and the end of the second bucket rod are each connected with a bucket rod support, and the two bucket rod supports are symmetrically arranged and fixedly connected through a connecting cylinder; the bucket rod support comprises a first connecting end, a second connecting end, a third connecting end and a connecting column, the first connecting end is connected with the bucket rod, the second connecting end and the third connecting end are connected with a bucket connecting rod, the connecting column is connected with the connecting cylinder, and the connecting column is integrated with the first connecting end, the second connecting end and the third connecting end. The bucket rod support is a casting part, the casting part is not provided with a welding seam, when the bucket rod support bears the load applied by the bucket, no load of the bucket rod support is concentrated in the welding seam area, stress can act on the casting part body, and structural cracking caused by welding can be reduced. Therefore, the bucket rod support is good in overall bearing characteristic, high in fatigue resistance, capable of bearing large loads and not prone to damage.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to an electric shovel bucket arm device. Background Art

[0002] As the core excavation equipment in open-pit mining operations, electric shovels undertake key excavation tasks. Among them, the bucket arm, as one of the core components in the excavation operation of the electric shovel, has the main function of connecting and supporting the bucket, and at the same time transmitting the force generated by the pushing mechanism to the bucket. Specifically, the front end of the bucket arm is fixedly connected to the bucket through the ear block structure, and the bucket teeth of the bucket arm mesh with the corresponding bucket teeth on the boom saddle. During the excavation process, the bucket arm moves backward under the drive of the pushing system to assist the bucket in filling the material. The bucket completes the excavation action under the synergistic effect of the pushing force and the lifting force.

[0003] At present, the working device of the bucket arm of the electric shovel generally adopts a welded structure. However, the weld quality of the welded structure is easily affected by external environmental factors and human operation factors. It is difficult to ensure the consistency of the welding process, resulting in fluctuations in welding quality, which in turn affects the overall performance and service life of the bucket arm. Through finite element simulation analysis technology, the bucket head is subjected to a large stress concentration at the weld. When the consistency of the weld quality cannot be effectively guaranteed, the weld poses a serious threat to the overall performance and service life of the bucket arm. Summary of the invention

[0004] In order to solve the technical problems existing in the prior art, the present application provides an electric shovel bucket arm device for connecting and supporting a bucket, comprising a first bucket arm and a second bucket arm arranged in parallel, the ends of the first bucket arm and the second bucket arm are connected to a bucket arm support, the two bucket arm supports are symmetrically arranged and fixedly connected by a connecting tube, the bucket arm support comprises a first connecting end connected to the bucket arm, a second connecting end and a third connecting end connected to a bucket link, and a connecting column connected to the connecting tube, wherein the connecting column is integral with the first connecting end, the second connecting end and the third connecting end.

[0005] Furthermore, the first connecting end is forked, including a first fork arm, a second fork arm, and a first connecting plate and a second connecting plate connected between the first fork arm and the second fork arm. The connecting plates are smooth curved surfaces near the first fork arm and the second fork arm, and the curvature of the curved surface of the connecting plate near the first fork arm is greater than the curvature of the curved surface of the connecting plate near the second fork arm.

[0006] Furthermore, the first connecting plate and the second connecting plate are parallel to each other, and the first connecting plate and the second connecting plate are integral with the connecting column.

[0007] Furthermore, a first welding groove is provided at the outer edges of the first connecting plate and the second connecting plate, and the angle of the first welding groove is 45°.

[0008] Furthermore, a second welding groove is provided at the inner edges of the first connecting plate and the second connecting plate, and the angle of the second welding groove is 45°.

[0009] Furthermore, the second connecting end includes a first rib plate and a second rib plate which are arranged in parallel, and ends of the first rib plate and the second rib plate are provided with a coaxial first connecting hole.

[0010] Furthermore, raised flanges are provided on both sides of the first connecting hole.

[0011] Furthermore, the third connecting end is an ear block, a second connecting hole is provided at the end of the ear block, and a side of the ear block close to the connecting column is a processing reference surface.

[0012] Furthermore, the connecting column is located in the middle of the boom support, and the middle of the connecting column is a weight-reducing hole, wherein the weight-reducing hole is a through hole.

[0013] Furthermore, a third welding groove is provided at the outer edge of the connecting column, and an annular reinforcing rib is provided circumferentially at the outer bottom.

[0014] Furthermore, the boom support is a casting.

[0015] Compared with the prior art, the beneficial effects of this application are: 1. The arm support of the present application is a casting without welds. When bearing the load imposed by the bucket, the arm support does not have load concentrated in the weld area, and the stress can be applied to the casting body, which can reduce structural cracking caused by welding. Therefore, the overall load-bearing characteristics of the arm support are good, the fatigue resistance is high, and it can also bear a large load and is not easy to be damaged.

[0016] 2. The surface where the first connecting end of the boom support of the present application is connected to the boom is a curved structure, which not only improves the fit between the boom and the boom support, reduces the stress concentration phenomenon of the boom support, and makes the load-bearing characteristics of each part of the first connecting end more uniform, thereby improving the load-bearing capacity of the boom support. At the same time, this structure also optimizes the welding process, making the welding process smoother and the weld stronger. Among them, the curvature of the curved surface of the connecting plate near the first fork arm is greater than the curvature of the curved surface of the connecting plate near the second fork arm, which can better disperse and withstand the forces and torques in different directions applied by the bucket to the boom support, thereby improving the load-bearing capacity and stability of the entire structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the structure of the electric shovel bucket arm device of the present application; Figure 2 This is a schematic diagram of the structure of the boom support of this application; Figure 3 This is a schematic diagram of the structure of the boom support of this application; Figure 4 A front view of the boom support of the present application; Figure 5 A top view of the boom support of the present application; Figure 6 for Figure 5 AA section view; In the figure: 1. First boom; 2. Second boom; 3. Connecting tube; 4. Boom support; 41. First connecting end; 411. First fork arm; 412. Second fork arm; 413. First connecting plate; 414. Second connecting plate; 415. Curved surface; 416. First welding groove; 417. Second welding groove; 42. Second connecting end; 421. First rib plate; 422. Second rib plate; 423. First connecting hole; 424. Flange; 43. Third connecting end; 431. Second connecting hole; 432. Reference plane; 44. Connecting column; 441. Lightening hole; 442. Reinforcing rib; 443. Third welding groove; 5. Vertical plate; 6. Blocking plate; 7. Rack; 8. Baffle. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] The present application is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect defined in this way can be combined with any other aspect or aspects, unless it is clearly stated that it cannot be combined. In particular, any feature that is considered to be preferred or advantageous can be combined with one or more other features that are considered to be preferred or advantageous.

[0020] The words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0021] In the description of the present application, it should be understood that the terms "inside", "outside", "up", "down", "left" and "right" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present application.

[0022] refer to Figure 1 to Figure 2 As shown, the present application discloses an electric shovel arm device for connecting and supporting a bucket, including a first arm 1 and a second arm 2 arranged in parallel, the first arm 1 and the second arm 2 have the same structure, both of which are long box-shaped structures surrounded by a vertical plate 5 and a blocking plate 6, the upper end of the blocking plate 6 is provided with a rack 7 meshing with the bucket teeth on the boom saddle, and the end of the rack 7 is provided with a baffle 8 that plays a limiting role. The ends of the first arm 1 and the second arm 2 are both connected to an arm support 4, the two arm supports 4 are symmetrically arranged and fixedly connected by a connecting tube 3, the arm support 4 includes a first connecting end 41 connected to the arm, a second connecting end 42 and a third connecting end 43 connected to the connecting rod, and a connecting column 44 connected to the connecting tube 3, wherein the connecting column 44 is integrated with the first connecting end 41, the second connecting end 42 and the third connecting end 43.

[0023] In some embodiments, the arm support 4 is a casting without a weld. When the load applied by the bucket is carried, the arm support 4 does not have a load concentrated in the weld area, and the stress can be applied to the casting body, which can reduce structural cracking caused by welding. Therefore, the arm support 4 has good overall load-bearing characteristics, high fatigue resistance, can also bear a large load, and is not easily damaged.

[0024] In some embodiments, reference Figures 3 to 6As shown, the first connecting end 41 of the boom support 4 is welded to the boom, and the first connecting end 41 is forked. This structure not only enhances the stability of the connection, but also facilitates welding with different components. Specifically, the first connecting end 41 includes a first fork arm 411 and a second fork arm 412 welded to the blocking plate 6, and a first connecting plate 413 and a second connecting plate 414 connected between the first fork arm 411 and the second fork arm 412. The first connecting plate 413 and the second connecting plate 414 are used for welding and connection with the vertical plate 5. The first connecting plate 413 and the second connecting plate 414 are both smooth curved surfaces 415 near the first fork arm 411 and the second fork arm 412, and the curvature of the curved surface 415 of the connecting plate near the first fork arm 411 is greater than the curvature of the curved surface 415 of the connecting plate near the second fork arm 412. The curved surface structure not only improves the fit between the boom and the boom support 4, reduces the stress concentration phenomenon of the boom support 4, makes the load-bearing characteristics of each part of the first connecting end 41 more uniform, and improves the load-bearing capacity of the boom support 4. At the same time, this structure also optimizes the welding process, making the welding process smoother and the weld stronger. Among them, the curvature of the curved surface 415 of the connecting plate near the first fork arm 411 is greater than the curvature of the curved surface 415 of the connecting plate near the second fork arm 412, so that the forces and torques in different directions applied by the bucket to the boom support 4 can be better dispersed and withstood, thereby improving the load-bearing capacity and stability of the entire structure.

[0025] In some embodiments, the first connecting plate 413 and the second connecting plate 414 are parallel to each other, and the first connecting plate 413 and the second connecting plate 414 are provided with a first welding groove 416 at their outer edges (i.e., the outer edges where the first connecting plate 413 and the vertical plate 5 are in contact, and the outer edges where the second connecting plate 414 and the vertical plate 5 are in contact), which not only facilitates the welding operation, but also improves the quality and strength of the weld. Similarly, the first connecting plate 413 and the second connecting plate 414 are provided with a second welding groove 417 at their inner edges (i.e., the inner edges where the first connecting plate 413 and the vertical plate 5 are in contact, and the inner edges where the second connecting plate 414 and the vertical plate 5 are in contact). The angle of the first welding groove 416 and the angle of the second welding groove 417 can be selected according to actual conditions, for example, the angle of the first welding groove 416 and the angle of the second welding groove 417 can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc. Preferably, the angle of the first welding groove 416 and the angle of the second welding groove 417 are 45°. The 45° welding groove is neither too steep to be difficult to fill nor too gentle to reduce the cross-sectional strength of the weld.

[0026] In some embodiments, the second connection end 42 includes a first rib plate 421 and a second rib plate 422 arranged in parallel, and the ends of the first rib plate 421 and the second rib plate 422 are both provided with a first connection hole 423 for connecting to the bucket connecting rod, and the axes of the first connection hole 423 on the first rib plate 421 and the first connection hole 423 on the second rib plate 422 coincide. The first connection hole 423 on the first rib plate 421 and the first connection hole 423 on the second rib plate 422 are both provided with raised flanges 424 on both the inner and outer sides. These flanges increase the material thickness around the connection holes, thereby improving the bearing capacity and durability of the connection holes.

[0027] In some embodiments, the third connecting end 43 is an ear block, and a second connecting hole 431 for connecting to a bucket connecting rod is provided at the end of the ear block, and a side of the ear block close to the connecting column 44 is a processing reference surface 432 .

[0028] In some embodiments, the connecting column 44 is located in the middle of the boom support 4, and the middle of the connecting column 44 is a weight-reducing hole 441, wherein the weight-reducing hole 441 is a through hole. The weight-reducing hole 441 can make the boom support 4 lighter under the premise of ensuring the bearing capacity of the boom support 4, which is conducive to lightweighting. A third welding groove 443 is provided at the outer edge of the connecting column 44, and the connecting column 44 is connected to the connecting tube 3 as a whole by full penetration welding. The third welding groove 443 not only facilitates the welding operation, but also improves the quality and strength of the weld, and improves the strength and stability of the connection between the boom support 4 and the connecting tube 3.

[0029] In some embodiments, reinforcing ribs 442 are provided circumferentially at the outer bottom of the connecting column 44, and the reinforcing ribs 442 further enhance the structural strength and stability of the boom support 4, thereby improving the bearing capacity of the entire boom support 4, extending the service life of the boom support 4, and reducing the cost of maintenance and replacement.

[0030] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, which fall within the scope of the present application to be protected. The scope of protection claimed in the present application is defined by the attached claims and their equivalents.

Claims

1. An electric shovel bucket rod device, used to connect and support a bucket, characterized in that: The invention comprises a first boom (1) and a second boom (2) arranged in parallel, the ends of the first boom (1) and the second boom (2) are both connected to a boom support (4), the two boom supports (4) are symmetrically arranged and fixedly connected via a connecting tube (3), the boom support (4) comprises a first connecting end (41) connected to the boom, a second connecting end (42) and a third connecting end (43) connected to a bucket link, and a connecting column (44) connected to the connecting tube (3), wherein the connecting column (44) is integral with the first connecting end (41), the second connecting end (42) and the third connecting end (43).

2. The electric shovel bucket arm device according to claim 1, characterized in that: The first connecting end (41) is forked, comprising a first fork arm (411), a second fork arm (412), and a first connecting plate (413) and a second connecting plate (414) connected between the first fork arm (411) and the second fork arm (412); the connecting plate has smooth curved surfaces (415) near the first fork arm (411) and the second fork arm (412); and the curvature of the curved surface (415) of the connecting plate near the first fork arm (411) is greater than the curvature of the curved surface (415) of the connecting plate near the second fork arm (412).

3. The electric shovel bucket arm device according to claim 2, characterized in that: The first connecting plate (413) and the second connecting plate (414) are parallel to each other, and the first connecting plate (413) and the second connecting plate (414) are integral with the connecting column (44).

4. The electric shovel bucket arm device according to claim 3, characterized in that: A first welding groove (416) is provided at the outer edges of the first connecting plate (413) and the second connecting plate (414), and the angle of the first welding groove (416) is 45°.

5. The electric shovel bucket arm device according to claim 3, characterized in that: A second welding groove (417) is provided at the inner edges of the first connecting plate (413) and the second connecting plate (414), and the angle of the second welding groove (417) is 45°.

6. The electric shovel bucket arm device according to claim 1, characterized in that: The second connecting end (42) comprises a first rib plate (421) and a second rib plate (422) which are arranged in parallel, and ends of the first rib plate (421) and the second rib plate (422) are provided with coaxial first connecting holes (423).

7. The electric shovel bucket arm device according to claim 6, characterized in that: Protruding flange platforms (424) are provided on both sides of the first connecting hole (423).

8. The electric shovel bucket arm device according to claim 1, characterized in that: The third connection end (43) is an ear block, a second connection hole (431) is provided at the end of the ear block, and a side of the ear block close to the connection column (44) is a processing reference surface (432).

9. The electric shovel bucket arm device according to claim 1, characterized in that: The connecting column (44) is located in the middle of the boom support (4), and a weight-reducing hole (441) is located in the middle of the connecting column (44), wherein the weight-reducing hole (441) is a through hole.

10. The electric shovel bucket arm device according to claim 9, characterized in that: A third welding groove (443) is provided at the outer edge of the connecting column (44), and an annular reinforcing rib (442) is provided in the circumferential direction of the outer bottom.

11. The electric shovel bucket arm device according to any one of claims 1 to 10, characterized in that: The arm support (4) is a casting.

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