A digging machine boom made by welding
By employing a welded structure and staggered welding design, the problems of machining large excavator booms and weld fractures were solved, resulting in excavator booms that are easy to manufacture and have improved load capacity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGYIN HUAJUN MACHINERY CO LTD
- Filing Date
- 2025-04-21
- Publication Date
- 2026-06-05
Smart Images
Figure CN224325823U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of excavator technology, and relates to an excavator boom, specifically an excavator boom that is welded together. Background Technology
[0002] The boom is the connecting component between the front frame and the bucket of a backhoe loader, and it is a critical load-bearing and rotational hub for loading operations. Due to the large size of the boom of a large excavator, manufacturing it as a single piece would present difficulties in processing and handling. If it is manufactured separately and welded, the weld joints are prone to breakage under load. Utility Model Content
[0003] Based on the content in the background art, this utility model provides an excavator boom that is welded together, which includes a first upper cover plate, a second upper cover plate, a third upper cover plate, a first lower cover plate, a second lower cover plate, a third lower cover plate, two first side plates, two second side plates, two third side plates, two front connecting plates, two rear connecting plates, a front U-shaped plate, and a rear U-shaped plate.
[0004] The first upper cover plate, the second upper cover plate, and the third upper cover plate are welded to each other in sequence, and the first lower cover plate, the second lower cover plate, and the third lower cover plate are welded to each other in sequence. The two open ends of the front U-shaped plate are welded to the first upper cover plate and the first lower cover plate, respectively. The two first side plates are arranged opposite each other, the two second side plates are arranged opposite each other, and the two third side plates are arranged opposite each other. The two ends of the second side plate are welded to the adjacent first side plate and the adjacent third side plate, respectively.
[0005] Each first side plate has a front connecting plate welded to its front end face, that is, there are two front connecting plates arranged opposite each other. The front connecting plates are also welded to the front U-shaped plate.
[0006] The top surface of the first side plate is simultaneously welded to the front U-shaped plate, the first upper cover plate, and the second upper cover plate; the bottom surface of the first side plate is simultaneously welded to the front U-shaped plate and the first lower cover plate. The top surface of the second side plate is welded to the second upper cover plate; the bottom surface of the second side plate is simultaneously welded to the first lower cover plate, the second lower cover plate, and the third lower cover plate. The top surface of the third side plate is simultaneously welded to the second upper cover plate and the third upper cover plate; the bottom surface of the third side plate is welded to the third lower cover plate.
[0007] The tail ends of the third upper cover plate and the third lower cover plate are respectively provided with U-shaped notches. The rear U-shaped plate is set in the U-shaped notch and is simultaneously welded to the third upper cover plate and the third lower cover plate. Each third side plate is provided with a rear connecting plate at the rear, that is, there are also two rear connecting plates arranged opposite each other. The rear connecting plates are simultaneously welded to the third upper cover plate, the third lower cover plate, the rear U-shaped plate and the corresponding third side plate.
[0008] This staggered welding connection between the upper and lower cover plates and the side plates ensures the overall buckling strength of the excavator boom, prevents breakage at the weld, and guarantees the load-bearing capacity of the boom.
[0009] Furthermore, two opposing central connecting plates are welded to the top surface of the second upper cover plate. Of course, each of the connecting plates is provided with shaft holes for connecting with other components such as the excavator frame, bucket, and hydraulic cylinder.
[0010] Furthermore, the excavator boom assembled by the above-mentioned welding also includes two arc-shaped sealing plates. The rear connecting plate is simultaneously welded to the third upper cover plate, the third lower cover plate, the rear U-shaped plate, and the corresponding third side plate through the corresponding arc-shaped sealing plates. That is, the arc-shaped sealing plates are first welded to the third upper cover plate, the third lower cover plate, the rear U-shaped plate, and the corresponding third side plate simultaneously to "seal" the joint. The rear connecting plate is then welded to the corresponding arc-shaped sealing plate. This indirect welding structure of the arc-shaped sealing plates can improve the welding stability of the rear connecting plate.
[0011] Preferably, partitions are provided between the front connecting plate and the corresponding first side plate, between the first side plate and the adjacent second side plate, and between the second side plate and the adjacent third side plate. The front connecting plate, the first side plate, the second side plate, and the third side plate each have an inclined surface on the end face at the corresponding partition. Two adjacent inclined surfaces are welded to the end face of the corresponding partition at the same time. In this way, the welding surface formed by the two inclined surfaces and the end face of the corresponding partition can form a large weld contact area to ensure weld quality and welding strength. The welded partition can also act as a reinforcing plate in the structure of the boom.
[0012] Through the above technical solutions, this utility model has at least the following beneficial effects:
[0013] The excavator boom described in this application has a modular structure, consisting of multiple cover plates, side plates, connecting plates, and U-shaped plates welded together. This allows for modular manufacturing, facilitating handling and assembly, and reducing manufacturing costs. Furthermore, its staggered welded connection method ensures the overall buckling strength of the excavator boom, prevents breakage at the weld joints, and guarantees the load-bearing capacity of the boom. Attached Figure Description
[0014] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of this utility model in a schematic manner. Therefore, they only show the components related to this utility model.
[0015] Figure 1 This is a disassembly diagram of the excavator boom assembled by welding as described in the embodiments of this application;
[0016] Figure 2 This is a schematic diagram of the overall structure of the excavator boom assembled by welding as described in the embodiments of this application;
[0017] Figure 3 This is a partial structural diagram of the excavator boom assembled by welding as described in the embodiments of this application at the partition plate. Detailed Implementation
[0018] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships are for illustrative purposes only and should not be construed as limiting this patent. If terms such as "first" and "second" are used for descriptive purposes only, they should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of the stated features. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0019] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0020] refer to Figure 1 and Figure 2 A welded excavator boom includes a first upper cover plate 11, a second upper cover plate 12, a third upper cover plate 13, a first lower cover plate 21, a second lower cover plate 22, a third lower cover plate 23, two first side plates 31, two second side plates 32, two third side plates 33, two front connecting plates 1, two rear connecting plates 2, a front U-shaped plate 3, and a rear U-shaped plate 4.
[0021] The first upper cover plate 11, the second upper cover plate 12, and the third upper cover plate 13 are welded to each other in sequence, and the first lower cover plate 21, the second lower cover plate 22, and the third lower cover plate 23 are welded to each other in sequence. The two open ends of the front U-shaped plate 3 are welded to the first upper cover plate 11 and the first lower cover plate 21 respectively. The two first side plates 31 are arranged opposite each other, the two second side plates 32 are arranged opposite each other, and the two third side plates 33 are arranged opposite each other. The two ends of the second side plate 32 are welded to the adjacent first side plate 31 and the adjacent third side plate 33 respectively.
[0022] Each first side plate 31 has a front connecting plate 1 welded to its front end face, that is, there are two front connecting plates 1 arranged opposite to each other. The front connecting plates 1 are also welded to the front U-shaped plate 3.
[0023] The top surface of the first side plate 31 is simultaneously welded to the front U-shaped plate 3, the first upper cover plate 11, and the second upper cover plate 12; the bottom surface of the first side plate 31 is simultaneously welded to the front U-shaped plate 3 and the first lower cover plate 21; the top surface of the second side plate 32 is welded to the second upper cover plate 12; the bottom surface of the second side plate 32 is simultaneously welded to the first lower cover plate 21, the second lower cover plate 22, and the third lower cover plate 23; the top surface of the third side plate 33 is simultaneously welded to the second upper cover plate 12 and the third upper cover plate 13; the bottom surface of the third side plate 33 is welded to the third lower cover plate 23.
[0024] Both the tail end of the third upper cover plate 13 and the tail end of the third lower cover plate 23 are provided with U-shaped notches. The rear U-shaped plate 4 is set at the U-shaped notch and is simultaneously welded to the third upper cover plate 13 and the third lower cover plate 23. Each third side plate 33 is provided with a rear connecting plate 2, that is, there are also two rear connecting plates 2 arranged opposite to each other. The rear connecting plates 2 are simultaneously welded to the third upper cover plate 13, the third lower cover plate 23, the rear U-shaped plate 4 and the corresponding third side plate 33. This staggered welding and fixing connection form can ensure the overall buckling strength of the excavator boom, avoid breakage at the weld, and ensure the load capacity of the boom.
[0025] Two opposing central connecting plates 7 are welded to the top surface of the second upper cover plate 12. Of course, each of the connecting plates is provided with shaft holes for connecting with other components of the excavator such as the frame, bucket, and cylinder.
[0026] The excavator boom assembled by the above-mentioned welding also includes two arc-shaped sealing plates 5. The rear connecting plate 2 is simultaneously welded to the third upper cover plate 13, the third lower cover plate 23, the rear U-shaped plate 4 and the corresponding third side plate 33 through the corresponding arc-shaped sealing plates 5. That is, the arc-shaped sealing plates 5 are first simultaneously welded to the third upper cover plate 13, the third lower cover plate 23, the rear U-shaped plate 4 and the corresponding third side plate 33 to "seal" the joint. The rear connecting plate 2 is then welded to the corresponding arc-shaped sealing plates 5. In this way, the indirect welding structure of the arc-shaped sealing plates 5 can improve the welding stability of the rear connecting plate 2.
[0027] A partition 6 is provided between the front connecting plate 1 and the corresponding first side plate 31, between the first side plate 31 and the adjacent second side plate 32, and between the second side plate 32 and the adjacent third side plate 33, respectively. (Refer to...) Figure 3 The front connecting plate 1, the first side plate 31, the second side plate 32 and the third side plate 33 each have a bevel 10 on their end faces at the corresponding partition 6. Two adjacent bevels 10 are welded to the end faces of the corresponding partition 6 at the same time. In this way, the welding surfaces formed by the two bevels 10 and the end faces of the corresponding partition 6 can form a large weld contact area to ensure weld quality and welding strength. The welded partition 6 can also serve as a reinforcing plate in the structure of the boom.
[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Based on the present utility model and the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A welding-assembled excavator boom, characterized in that: It includes a first upper cover plate (11), a second upper cover plate (12), a third upper cover plate (13), a first lower cover plate (21), a second lower cover plate (22), a third lower cover plate (23), two first side plates (31), two second side plates (32), two third side plates (33), two front connecting plates (1), two rear connecting plates (2), a front U-shaped plate (3), and a rear U-shaped plate (4); The first upper cover plate (11), the second upper cover plate (12), and the third upper cover plate (13) are welded to each other in sequence, and the first lower cover plate (21), the second lower cover plate (22), and the third lower cover plate (23) are welded to each other in sequence. The two open ends of the front U-shaped plate (3) are welded to the first upper cover plate (11) and the first lower cover plate (21) respectively. The two first side plates (31) are arranged opposite to each other, the two second side plates (32) are arranged opposite to each other, and the two third side plates (33) are arranged opposite to each other. The two ends of the second side plate (32) are welded to the adjacent first side plate (31) and the adjacent third side plate (33) respectively. Each first side plate (31) has a front end connecting plate (1) welded to its front end face, and the front end connecting plate (1) is also welded to the front end U-shaped plate (3). The top surface of the first side plate (31) is simultaneously welded to the front U-shaped plate (3), the first upper cover plate (11), and the second upper cover plate (12), and the bottom surface of the first side plate (31) is simultaneously welded to the front U-shaped plate (3) and the first lower cover plate (21); the top surface of the second side plate (32) is welded to the second upper cover plate (12), and the bottom surface of the second side plate (32) is simultaneously welded to the first lower cover plate (21), the second lower cover plate (22), and the third lower cover plate (23); the top surface of the third side plate (33) is simultaneously welded to the second upper cover plate (12) and the third upper cover plate (13), and the bottom surface of the third side plate (33) is welded to the third lower cover plate (23); The tail end of the third upper cover plate (13) and the tail end of the third lower cover plate (23) are respectively provided with U-shaped notches. The rear U-shaped plate (4) is set at the U-shaped notch and is simultaneously welded to the third upper cover plate (13) and the third lower cover plate (23). A rear connecting plate (2) is respectively provided behind each third side plate (33). The rear connecting plate (2) is simultaneously welded to the third upper cover plate (13), the third lower cover plate (23), the rear U-shaped plate (4) and the corresponding third side plate (33).
2. The excavator boom welded together according to claim 1, characterized in that: Two opposing central connecting plates (7) are also welded to the top surface of the second upper cover plate (12).
3. The excavator boom welded together according to claim 1 or 2, characterized in that: It also includes two arc-shaped sealing plates (5), and the rear connecting plate (2) is simultaneously welded to the third upper cover plate (13), the third lower cover plate (23), the rear U-shaped plate (4) and the corresponding third side plate (33) through the corresponding arc-shaped sealing plates (5).
4. A welded excavator boom according to claim 1 or 2, characterized in that: A partition (6) is provided between the front connecting plate (1) and the corresponding first side plate (31), between the first side plate (31) and the adjacent second side plate (32), and between the second side plate (32) and the adjacent third side plate (33). The front connecting plate (1), the first side plate (31), the second side plate (32) and the third side plate (33) are each provided with a bevel (10) on the end face of the corresponding partition (6). The two adjacent bevels (10) are welded to the end face of the corresponding partition (6) at the same time.