A mechanism for adjusting the angle of a large arm of an excavator

Abstract

The utility model relates to excavator technical field provides a kind of excavator boom angle adjusting mechanism, including mounting bracket, both ends of the mounting bracket are fixed with mounting plate, the outer wall on the top side of mounting bracket is hinged with arm body, the bottom of the mounting bracket is close to the side of arm body and is provided with adjusting structure, the top of the arm body is provided with buffer structure, and the buffer structure includes lower connecting seat, spring and upper connecting seat.The utility model is provided with buffer structure, when the use angle of arm body changes, it will drive spring to elongate or shorten, spring will absorb the instantaneous impact force when arm body act, vibration is inhibited, reduce the vibration caused by load mutation or uneven ground in the operation process, improve operation comfort, avoid rigid collision between arm body and mounting bracket, reduce structural fatigue risk, realize the device has the function of arm body buffering protection, improve the security of the excavator boom angle adjusting mechanism when using.

Description

Technical Field

[0001] This utility model relates to the field of excavator technology, and in particular to an excavator boom angle adjustment mechanism. Background Technology

[0002] As the core actuator of construction machinery, the angle adjustment performance of the excavator boom directly affects the overall operating efficiency of the machine. Traditional manual operation of the excavator boom has a large error and it is difficult to achieve precise adjustment of the excavator boom angle. Therefore, it is necessary to design an excavator boom angle adjustment mechanism.

[0003] To address this, patent CN208934024U discloses an excavator boom, including a main boom. A first mounting bracket and a second mounting bracket are fixedly mounted at the middle of the top of the main boom. A connecting hole is fixedly provided at one end of the main boom, and the connecting hole is rotatably connected to one end of the forearm via a pin. A third mounting bracket and a fourth mounting bracket are fixedly provided at the top end of the forearm. This excavator boom, by installing two hydraulic rods, allows for normal use with only one hydraulic rod in operation. If the hydraulic rod is damaged, the other hydraulic rod can be used. Under heavy excavation loads, both hydraulic rods can be used simultaneously. The boom includes an oil tank and absorbent cotton. The absorbent cotton absorbs the lubricating oil flowing out of the oil tank and applies it to the connecting hole. An oil dipstick allows the operator to judge the oil level in the tank by the oil level on the dipstick and add lubricating oil as needed.

[0004] While the excavator boom described above allows for easy addition of lubricating oil during use, it is inconvenient to provide cushioning and protection for the boom when adjusting its angle. This can lead to wear and tear on the boom over time. Therefore, it is necessary to design an excavator boom angle adjustment mechanism. Utility Model Content

[0005] The purpose of this utility model is to provide an excavator boom angle adjustment mechanism to solve the defects of existing excavator boom angle adjustment mechanisms, which are inconvenient to buffer and protect the boom when adjusting the boom angle, and will wear down the boom after long-term use.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an excavator boom angle adjustment mechanism, including a mounting bracket;

[0007] Mounting plates are fixed at both ends of the mounting frame, and an arm is hinged to the outer wall of the top side of the mounting frame.

[0008] An adjustment structure is provided on the bottom side of the mounting frame near the arm body;

[0009] The top end of the arm body is provided with a buffer structure, which includes a lower connecting seat, a spring and an upper connecting seat. The lower connecting seat is fixed to the side of the top end of the arm body away from the mounting frame, and the upper connecting seat is fixed to the outer wall of the top of the mounting frame near the side of the arm body. A spring is provided between the lower connecting seat and the upper connecting seat.

[0010] Furthermore, the mounting plates are symmetrically distributed at both ends of the mounting frame.

[0011] Furthermore, the adjustment structure includes a lower connecting plate, a lower connecting shaft, a lower connecting ring, a hydraulic rod, an upper connecting plate, an upper connecting ring, and an upper connecting shaft. The lower connecting plates are all fixed to the outer wall of one side of the bottom of the mounting frame. A lower connecting ring is fixed between adjacent lower connecting plates. A lower connecting shaft is sleeved on the outer side of the lower connecting ring. The upper connecting plates are evenly fixed to the side of the bottom of the arm away from the mounting frame. An upper connecting shaft is fixed between adjacent upper connecting plates. An upper connecting ring is sleeved on the outer side of the upper connecting shaft. A hydraulic rod is provided between the upper connecting ring and the lower connecting shaft.

[0012] Furthermore, the lower connecting shaft and the lower connecting ring are rotatably connected, the top end of the hydraulic rod and the bottom end of the upper connecting ring are fixedly connected, and the upper connecting ring and the upper connecting shaft are rotatably connected.

[0013] Furthermore, the bottom end of the hydraulic rod is fixedly connected to the top end of the lower connecting shaft, and the top end of the upper connecting plate is slidably connected to the bottom end of the arm. Furthermore, the bottom end of the spring is hinged to the lower connecting seat.

[0014] Furthermore, the top of the spring is hinged to the upper connecting seat.

[0015] The advantages of the excavator boom angle adjustment mechanism provided by this utility model are as follows:

[0016] By incorporating a buffer structure, when the boom's operating angle changes, the spring extends or shortens. When the spring contracts, it absorbs the instantaneous impact force during boom movement, suppressing vibration and reducing vibration caused by sudden load changes or uneven ground during operation. This improves operational comfort, avoids rigid collisions between the boom and the mounting frame, and reduces the risk of structural fatigue. The device thus provides convenient buffer protection for the boom, enhancing the safety of the excavator boom angle adjustment mechanism during use.

[0017] By incorporating an adjustable structure and controlling the extension and retraction of a hydraulic rod, the boom can be raised and lowered smoothly at one end. The boom and mounting frame are hinged, allowing for adjustment of the boom's tilt angle during elevation, ensuring precise adjustment of the working angle. The symmetrically distributed lower connecting shaft and upper connecting ring, as well as the lower connecting ring and upper connecting shaft, reduce boom swaying during movement, improve load capacity, and prevent mechanical wear caused by long-term use. This device facilitates easy adjustment of the boom's working angle, enhancing the convenience and efficiency of the excavator's boom angle adjustment mechanism. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0020] Figure 3 This is a three-dimensional structural schematic diagram of the main cross-section of this utility model;

[0021] Figure 4 This is a top-view cross-sectional three-dimensional structural diagram of the present invention.

[0022] Figure 5 This is a side view cross-sectional three-dimensional structural diagram of the present invention.

[0023] The following are the annotations in the figure: 1. Mounting bracket; 2. Mounting plate; 3. Adjustment structure; 31. Lower connecting plate; 32. Lower connecting shaft; 33. Lower connecting ring; 34. Hydraulic rod; 35. Upper connecting plate; 36. Upper connecting ring; 37. Upper connecting shaft; 4. Arm body; 5. Buffer structure; 51. Lower connecting seat; 52. Spring; 53. Upper connecting seat. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-5 The present invention provides an excavator boom angle adjustment mechanism, including a mounting bracket 1.

[0026] Reference Figures 1-5Mounting bracket 1 has mounting plates 2 fixed at both ends. An arm 4 is hinged to the outer wall of one side of the top of mounting bracket 1. An adjustment structure 3 is provided on the bottom side of mounting bracket 1 near the arm 4. Mounting plates 2 are symmetrically distributed at both ends of mounting bracket 1. The adjustment structure 3 includes a lower connecting plate 31, a lower connecting shaft 32, a lower connecting ring 33, a hydraulic rod 34, an upper connecting plate 35, an upper connecting ring 36, and an upper connecting shaft 37. The lower connecting plates 31 are all fixed to the outer wall of one side of the bottom of mounting bracket 1. A lower connecting ring 33 is fixed between adjacent lower connecting plates 31. A lower connecting shaft 32 is sleeved on the outer side of the lower connecting ring 33. The upper connecting plates 35 are evenly fixed to the outer wall of the mounting bracket 1. On the side of the arm body 4 away from the mounting frame 1, an upper connecting shaft 37 is fixed between adjacent upper connecting plates 35. An upper connecting ring 36 is sleeved on the outside of the upper connecting shaft 37. A hydraulic rod 34 is provided between the upper connecting ring 36 and the lower connecting shaft 32. The lower connecting shaft 32 and the lower connecting ring 33 are rotatably connected. The top end of the hydraulic rod 34 is fixedly connected to the bottom end of the upper connecting ring 36. The upper connecting ring 36 and the upper connecting shaft 37 are rotatably connected. The bottom end of the hydraulic rod 34 is fixedly connected to the top end of the lower connecting shaft 32. The top end of the upper connecting plate 35 and the bottom end of the arm body 4 are slidably connected. Furthermore, the bottom end of the spring 52 is hingedly connected to the lower connecting seat 51.

[0027] The hydraulic rod 34 is fixed at both ends to the lower connecting shaft 32 and the upper connecting ring 36 respectively. Its extension and retraction are controlled by the hydraulic system, which pushes the arm body 4 to rotate around the hinge point. The upper connecting plate 35 is slidably connected to the arm body 4, and the angle can be infinitely adjusted in conjunction with the movement of the hydraulic rod 34.

[0028] Reference Figures 1-3 and Figure 5 The top of the arm body 4 is provided with a buffer structure 5, which includes a lower connecting seat 51, a spring 52 and an upper connecting seat 53. The lower connecting seat 51 is fixed to the side of the top of the arm body 4 away from the mounting frame 1, and the upper connecting seat 53 is fixed to the outer wall of the top of the mounting frame 1 near the arm body 4. A spring 52 is provided between the lower connecting seat 51 and the upper connecting seat 53. The bottom end of the spring 52 is hinged to the lower connecting seat 51, and the top end of the spring 52 is hinged to the upper connecting seat 53.

[0029] The lower connecting seat 51 is fixed to the arm body 4, and the spring 52 is hinged to the upper connecting seat 53 on the mounting frame 1 to form a flexible connection. When the arm moves, the hinge point of the lower connecting seat 51 and the spring 52 is adaptively adjusted with the change of angle, and the impact energy is dispersed through mechanical damping.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An excavator boom angle adjustment mechanism, comprising a mounting bracket (1); Its features are: Mounting plates (2) are fixed at both ends of the mounting frame (1), and an arm (4) is hinged to the outer wall of the top side of the mounting frame (1). An adjustment structure (3) is provided on the bottom side of the mounting frame (1) near the arm body (4); The top end of the arm body (4) is provided with a buffer structure (5), which includes a lower connecting seat (51), a spring (52) and an upper connecting seat (53). The lower connecting seat (51) is fixed to the side of the top end of the arm body (4) away from the mounting frame (1), and the upper connecting seat (53) is fixed to the outer wall of the top of the mounting frame (1) near the side of the arm body (4). A spring (52) is provided between the lower connecting seat (51) and the upper connecting seat (53).

2. The excavator boom angle adjustment mechanism according to claim 1, characterized in that: The mounting plates (2) are symmetrically distributed at both ends of the mounting frame (1).

3. The excavator boom angle adjustment mechanism according to claim 1, characterized in that: The adjustment structure (3) includes a lower connecting plate (31), a lower connecting shaft (32), a lower connecting ring (33), a hydraulic rod (34), an upper connecting plate (35), an upper connecting ring (36), and an upper connecting shaft (37). The lower connecting plates (31) are all fixed on the outer wall of the bottom side of the mounting frame (1). A lower connecting ring (33) is fixed between adjacent lower connecting plates (31). The lower connecting shaft (32) is sleeved on the outer side of the lower connecting ring (33). The upper connecting plates (35) are evenly fixed on the side of the bottom of the arm (4) away from the mounting frame (1). An upper connecting shaft (37) is fixed between adjacent upper connecting plates (35). An upper connecting ring (36) is sleeved on the outer side of the upper connecting shaft (37). A hydraulic rod (34) is provided between the upper connecting ring (36) and the lower connecting shaft (32).

4. The excavator boom angle adjustment mechanism according to claim 3, characterized in that: The lower connecting shaft (32) and the lower connecting ring (33) are rotatably connected, the top end of the hydraulic rod (34) and the bottom end of the upper connecting ring (36) are fixedly connected, and the upper connecting ring (36) and the upper connecting shaft (37) are rotatably connected.

5. The excavator boom angle adjustment mechanism according to claim 3, characterized in that: The bottom end of the hydraulic rod (34) is fixedly connected to the top end of the lower connecting shaft (32), and the top end of the upper connecting plate (35) is slidably connected to the bottom end of the arm body (4).

6. The excavator boom angle adjustment mechanism according to claim 1, characterized in that: The bottom end of the spring (52) is hinged to the lower connecting seat (51).

7. The excavator boom angle adjustment mechanism according to claim 1, characterized in that: The top end of the spring (52) is hinged to the upper connecting seat (53).

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