Lug plate structure of movable arm
The design of the main connecting block and adjusting rod assembly solves the problems of inconvenient boom connection and abnormal noise from gap collisions in excavators, achieving a stable and adjustable boom connection structure and enhancing the operational stability of the excavator.
Patent Information
- Application Number
- CN202520364482.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-04
AI Technical Summary
When connecting the boom of an excavator, the connecting lugs have a simple and fixed structure, which makes disassembly inconvenient, prevents the spacing from being adjusted, and causes knocking noises and gap problems.
The system employs components such as a main connecting block, a top vertical rod, an adjusting insert rod, and an extrusion inner plate. An adjustable connection structure is achieved through through holes and mounting channels. The spacing is adjusted using a top spring and an inner cylinder, and stability is enhanced by combining a shock-absorbing rubber plate and a fixing collar.
It achieves stability and tightness in the boom connection, avoids bumps and abnormal noises during movement, and allows for adjustable spacing to meet the needs of operation and rotation.
Smart Images
Figure CN223838149U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of boom lug plate technology, specifically a boom lug plate structure. Background Technology
[0002] An excavator, also known as a digging machine or excavator, is an earthmoving machine that uses a bucket to excavate materials above or below the machine's bearing surface and load them into transport vehicles or unload them into a stockpile. The materials excavated by excavators are mainly soil, coal, silt, and pre-loosened soil and rock. In recent years, the development of construction machinery has been relatively rapid, and excavators have become one of the most important types of construction machinery. The three most important parameters of an excavator are: operating weight (mass), engine power, and bucket capacity.
[0003] When connecting the boom of a modern excavator, the connecting lug plate structure is a single reinforcing plate that is welded and fixed to the boom. This makes it inconvenient to disassemble and replace. Furthermore, the fixed structure prevents the installation and connection from being adjusted, which means that the connection position between the booms cannot be adjusted, affecting subsequent use. In addition, there will be gaps in the bolted connection, which will cause knocking and abnormal noises when moving. Utility Model Content
[0004] The purpose of this utility model is to provide a boom lug plate structure to solve the problems mentioned in the background art. The current boom connection structure of excavators is a single reinforcing plate, which is welded and fixed to the boom, making it inconvenient to disassemble and replace. The fixed structure also prevents the installation and connection from being adjusted, making it impossible to adjust the gap between the booms and affecting subsequent use. Furthermore, the bolted connection may have gaps, which can cause knocking and abnormal noises during operation.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A boom lug plate structure includes a main connecting block. Symmetrically evenly spaced through holes are provided on both sides of the main connecting block. A top vertical rod is symmetrically welded to the top of the main connecting block. Reinforcing side blocks are symmetrically welded to both sides of the main connecting block. An adjusting rod is vertically inserted into the top of the top vertical rod. A fixing block is welded to the top of the adjusting rod. A fixing collar is welded to the top of the fixing block. An installation groove is provided at the bottom of the main connecting block. A limit groove is symmetrically provided vertically on the inner side of the installation groove. The inner side of the installation groove is horizontally secured. The device is equipped with an extrusion inner plate. Limiting inner holes are evenly distributed at the top inner side of the mounting channel. A top-mounting spring is fixedly engaged on the inner side of the limiting inner hole. An inner cylinder is vertically fixedly connected to the inner side of the top vertical rod. A mating groove is provided at the bottom end of the adjusting rod. A fixed bearing is fixedly engaged on the inner side of the fixing collar. A shock-absorbing rubber plate is horizontally fixedly connected to the bottom surface of the extrusion inner plate. Positioning slots are evenly distributed on the top surface of the extrusion inner plate. Positioning posts are fixedly welded to the inner side of the positioning slots. Side limiting blocks are symmetrically welded to both sides of the extrusion inner plate.
[0007] In a preferred embodiment of this utility model, there are multiple through holes, and all of the through holes are opened in a through manner. The through holes are evenly distributed on the side of the main connecting block near the bottom end, and the through holes are connected to the interior of the mounting channel.
[0008] In a preferred embodiment of this utility model: there are two top vertical rods, which are arranged in parallel with each other. The bottom ends of the two top vertical rods are fixedly connected to the top edge of the main connecting block. There are two reinforcing side blocks, which are vertically symmetrically fixed at the top of the side centerline of the main connecting block. The side of the reinforcing side blocks is fixedly connected to the side of the top vertical rods.
[0009] In a preferred embodiment of this utility model: the adjusting rod and the top vertical rod are arranged in a telescopic rod structure, the fixing collar is horizontally fixedly connected to the top of the fixing block, the installation channel is opened at the bottom center of the main connecting block, and the limiting vertical grooves are symmetrically and parallelly arranged at the inner side centerline of the installation channel.
[0010] In a preferred embodiment of this utility model: the side of the extrusion inner plate is horizontally butted to the side opening end of the limiting vertical groove; the limiting inner holes are evenly distributed at the top inner position of the mounting channel; the top ends of the top springs are all fixedly connected to the inner side of the limiting inner holes, and the bottom ends extend and are fixedly connected to the inner side of the positioning slot; the bottom end is fixedly sleeved and connected to the outer side of the positioning column; the inner cylinder is vertically fixedly connected to the inner center line of the top vertical rod, and the output end extends vertically upward and is fixedly connected to the top inner position of the mating channel.
[0011] In a preferred embodiment of this utility model, the shock-absorbing rubber plate is made of rubber material, and the arrangement of the positioning slots is consistent with the arrangement of the limiting inner holes. One end of the side limiting block is fixedly connected to the center of the side of the extrusion inner plate, and the other end is snapped into the inner side of the limiting vertical groove.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] This invention involves fitting the main connecting block into the end of the upper boom via a mounting groove at the bottom. Pressing the main connecting block compresses the inner pressing plate, creating a pressing effect on multiple side-mounted springs. Multiple connecting bolts then pass through through holes and are fixed to the upper boom. After installation, the pressing springs press the inner pressing plate against the end of the upper boom. The damping rubber plate further isolates this, creating a secure connection between the upper boom and the main connecting block, increasing stability during movement and preventing gaps that could cause impacts or noises. The reinforcement of the outer side blocks further strengthens the connection of the top vertical rod. After controlling the extension and retraction of the output end of the internal cylinder, the output end drives the adjusting rod to extend and retract at the top of the vertical rod, thereby adjusting the fixed collar at one end to a specified distance from the main connecting block. The lower boom end is inserted between the two adjusting rods and then fixed inside the fixed bearing by a pin to form the overall boom installation operation. The extension and retraction of the adjusting rod can adjust the connection distance between the lower boom and the upper boom to meet the needs of the rotating movement. The use of a compression-type fixed installation structure makes it more stable after installation and will not cause bumps or abnormal noises due to installation gaps. The adjustable spacing structure allows it to be adjusted to a specified spacing to meet the requirements. Attached Figure Description
[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0015] Figure 1A three-dimensional structural diagram of a boom lug plate structure;
[0016] Figure 2 A structural schematic diagram showing the connection details of the main connecting block in a boom lug plate structure in three-dimensional cross-section.
[0017] Figure 3 A structural schematic diagram showing the connection details of a three-dimensional cross-section of the top vertical rod of a boom lug plate structure;
[0018] Figure 4 A structural schematic diagram showing the connection details of the fixed collar of a boom lug plate structure in a side cross-section.
[0019] Figure 5 This is a structural schematic diagram showing the three-dimensional connection details of the extruded inner plate of a boom lug plate structure.
[0020] In the diagram: 1. Main connecting block; 2. Through hole; 3. Top vertical rod; 4. Reinforcing side block; 5. Adjusting rod; 6. Fixed top block; 7. Fixed collar; 8. Mounting channel; 9. Limiting vertical groove; 10. Extruded inner plate; 11. Limiting inner hole; 12. Top connecting spring; 13. Inner cylinder; 14. Matching channel; 15. Fixed bearing; 16. Shock-absorbing rubber plate; 17. Positioning slot; 18. Positioning post; 19. Side limiting block. Detailed Implementation
[0021] Please see Figure 1 In this embodiment of the utility model, a boom ear plate structure includes a main connecting block 1. Multiple through holes 2 are symmetrically and evenly formed on both sides of the main connecting block 1, and all through holes 2 are formed through the entire structure. The through holes 2 are evenly distributed on the sides of the main connecting block 1 near the bottom end, and are connected to the interior of the mounting groove 8. A top vertical rod 3 is symmetrically welded to the top of the main connecting block 1. Reinforcing side blocks 4 are symmetrically welded to both sides of the main connecting block 1. There are two top vertical rods 3, and the two top vertical rods 3 are arranged parallel to each other. The bottom end of the straight rod 3 is fixedly connected to the top edge of the main connecting block 1. There are two reinforcing side blocks 4, and the two reinforcing side blocks 4 are vertically symmetrically fixed at the top of the side center line of the main connecting block 1. The side of the reinforcing side block 4 is fixedly connected to the side of the top vertical rod 3. The top of the top vertical rod 3 is vertically inserted with an adjusting rod 5. The top of the adjusting rod 5 is welded with a fixed top block 6. The top of the fixed top block 6 is welded with a fixed collar 7. The adjusting rod 5 and the top vertical rod 3 are arranged in a telescopic rod structure. The fixed collar 7 is horizontally fixedly connected to the top of the fixed top block 6.
[0022] Please see Figure 2-5In this embodiment of the utility model, a boom ear plate structure is provided, wherein the bottom end of the main connecting block 1 is provided with a mounting groove 8, and the inner side of the mounting groove 8 is vertically symmetrically provided with limiting vertical grooves 9. The mounting groove 8 is located at the center of the bottom end of the main connecting block 1. The limiting vertical grooves 9 are symmetrically and parallelly arranged at the center line of the inner side of the mounting groove 8. The inner side of the mounting groove 8 is horizontally engaged with a pressing inner plate 10. The inner top of the mounting groove 8 is uniformly provided with limiting inner plates 10. Hole 11, a top-connecting spring 12 is fixedly engaged on the inner side of the limiting inner hole 11, an inner cylinder 13 is vertically fixedly connected to the inner side of the top vertical rod 3, a mating groove 14 is opened at the bottom end of the adjusting rod 5, the side of the extrusion inner plate 10 is horizontally aligned with the side opening end of the limiting vertical groove 9, the limiting inner holes 11 are all equally spaced at the top end of the inner side of the mounting groove 8, and the top ends of the top-connecting springs 12 are all fixedly connected to the inner side of the limiting inner hole 11. The bottom extension is fixedly connected to the inner side of the positioning slot 17, and the bottom end is fixedly sleeved to the outer side of the positioning post 18. The inner cylinder 13 is vertically fixedly connected to the inner center line of the top vertical rod 3, and the output end extends vertically upward and is fixedly connected to the inner top of the mating groove 14. The inner side of the fixing collar 7 is fixedly clamped with the fixing bearing 15. The bottom surface of the extrusion inner plate 10 is horizontally fixedly connected with the shock-absorbing rubber plate 16. The top surface of the extrusion inner plate 10 is evenly provided with positioning slots 17. The inner side of the positioning slots 17 is fixedly welded with the positioning post 18. The two sides of the extrusion inner plate 10 are symmetrically welded with side limiting blocks 19. The shock-absorbing rubber plate 16 is made of rubber material. The arrangement of the positioning slots 17 is consistent with the arrangement of the limiting inner holes 11. One end of the side limiting block 19 is fixedly connected to the center of the side of the extrusion inner plate 10, and the other end is clamped to the inner side of the limiting vertical groove 9.
[0023] The working principle of this utility model is as follows:
[0024] The main connecting block 1 is fitted onto the end of the upper boom through the mounting groove 8 at the bottom. Pressing the main connecting block 1 creates a pressing effect on the inner pressing plate 10, and also presses against the multiple side-mounted springs 12. Multiple connecting bolts then pass through the through-hole 2 and are fixedly installed to the upper boom. After installation, the pressing springs 12 press against the inner pressing plate 10, pressing it against the end of the upper boom. The damping rubber plate 16 further isolates and secures the connection between the inner and outer plates, increasing stability during movement and preventing gaps that could cause impacts or abnormal noises. Furthermore, the reinforcement of the outer side block 4 makes the connection of the top vertical rod 3 more stable. After controlling the extension and retraction of the output end of the inner cylinder 13, the output end drives the adjusting rod 5 to extend and retract at the top of the top vertical rod 3, thereby adjusting the fixed collar 7 fixed at one end to a specified distance from the main connecting block 1. After the lower boom end is inserted between the two adjusting rods 5, it is fixedly inserted into the fixed bearing 15 by a pin to form an integral boom installation operation. The extension and retraction of the adjusting rod 5 can adjust the connection distance between the lower boom and the upper boom to meet the needs of the rotating movement.
[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A boom lug plate structure, comprising a main connecting block (1), characterized in that, The main connecting block (1) has symmetrically and evenly provided through holes (2) on both sides. A top vertical rod (3) is symmetrically fixedly welded to the top of the main connecting block (1). Reinforcing side blocks (4) are symmetrically welded to both sides of the main connecting block (1). An adjusting rod (5) is vertically inserted into the top of the top vertical rod (3). A fixed top block (6) is welded to the top of the adjusting rod (5). A fixed collar (7) is welded to the top of the fixed top block (6). An installation groove (8) is provided at the bottom of the main connecting block (1). A limiting vertical groove (9) is symmetrically provided vertically on the inner side of the installation groove (8). An extrusion inner plate (10) is horizontally engaged on the inner side of the installation groove (8). 8) has a limit hole (11) evenly opened on the inner top. The inner side of the limit hole (11) is fixedly connected to a top spring (12). The inner side of the top vertical rod (3) is vertically fixedly connected to an inner cylinder (13). The bottom end of the adjusting rod (5) is provided with a matching groove (14). The inner side of the fixed collar (7) is fixedly connected to a fixed bearing (15). The bottom surface of the extrusion inner plate (10) is horizontally fixedly connected to a shock-absorbing rubber plate (16). The top surface of the extrusion inner plate (10) is evenly provided with a positioning slot (17). The inner side of the positioning slot (17) is fixedly welded with a positioning column (18). The two sides of the extrusion inner plate (10) are symmetrically welded with side limit blocks (19).
2. The boom lug plate structure according to claim 1, characterized in that, The number of through holes (2) is multiple, and all through holes (2) are opened in a through manner. The through holes (2) are evenly arranged on the side of the main connecting block (1) near the bottom end. The through holes (2) are connected to the interior of the mounting channel (8).
3. The boom lug plate structure according to claim 1, characterized in that, There are two top vertical rods (3), and the two top vertical rods (3) are arranged in parallel to each other. The bottom ends of the two top vertical rods (3) are fixedly connected to the top edge of the main connecting block (1). There are two reinforcing side blocks (4), and the two reinforcing side blocks (4) are vertically symmetrically fixed at the top of the side center line of the main connecting block (1). The side of the reinforcing side block (4) is fixedly connected to the side of the top vertical rod (3).
4. The boom lug plate structure according to claim 1, characterized in that, The adjusting rod (5) and the top vertical rod (3) are arranged in a telescopic rod structure. The fixing collar (7) is horizontally fixed and connected to the top of the fixing top block (6). The installation channel (8) is opened at the bottom center of the main connecting block (1). The limiting vertical grooves (9) are symmetrically and parallelly arranged at the inner side centerline of the installation channel (8).
5. The boom lug plate structure according to claim 1, characterized in that, The side of the extrusion inner plate (10) is horizontally connected to the side opening end of the limiting vertical groove (9). The limiting inner holes (11) are all equally spaced and arranged at the top of the inner side of the installation groove (8). The top of the top spring (12) is fixedly connected to the inner side of the limiting inner hole (11) and the bottom end extends and is fixedly connected to the inner side of the positioning groove (17). The bottom end is fixedly sleeved and arranged on the outer side of the positioning column (18). The inner cylinder (13) is vertically fixedly connected to the inner center line of the top vertical rod (3) and the output end extends vertically upward and is fixedly connected to the top of the inner side of the mating groove (14).
6. The boom lug plate structure according to claim 1, characterized in that, The shock-absorbing rubber plate (16) is made of rubber material. The arrangement of the positioning slots (17) is consistent with the arrangement of the limiting inner holes (11). One end of the side limiting block (19) is fixedly connected to the center of the side of the extrusion inner plate (10), and the other end is snapped into the inner side of the limiting vertical groove (9).