An adjustable boom for an engineering machine
By designing a hydraulic rotating mechanism and an arc-shaped plate structure, the problems of low efficiency in construction machinery operating in narrow spaces and easy damage to rotating cylinders have been solved, enabling flexible angle adjustment of the bucket and improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO RELIANCE MASCH CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional construction machinery booms are inefficient and energy-intensive when operating in confined spaces, and the rotary cylinder drive method has limited angle and the piston rod is prone to damage.
The hydraulic rotating mechanism allows for direct adjustment of the bucket angle when the main boom moves to the left or right at a small angle. Combined with the arc-shaped plate structure of the rotating arm and the thrust ball bearing design, the bucket can rotate flexibly by ±180°, avoiding movement of the entire machine and stress on the piston rod.
It enables precise operation in confined spaces, reduces energy consumption, improves safety, and avoids increased energy consumption and piston rod damage caused by moving the entire machine.
Smart Images
Figure CN224531774U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of engineering machinery technology, specifically relating to an adjustable boom for engineering machinery. Background Technology
[0002] Traditional boom angle adjustment relies on the large-scale swing of the main boom or the movement of the entire machine. In confined spaces (such as urban underground utility tunnel construction or building demolition), site limitations prevent the machine from adjusting the bucket angle through overall machine movement, significantly reducing work efficiency. For example, in earthwork excavation within subway tunnels, traditional excavators require frequent adjustments to align with the work point, each adjustment taking approximately 3-5 minutes and increasing the risk of collisions with tunnel walls, posing safety hazards. Furthermore, frequent machine movement leads to repeated start-stop cycles of the hydraulic system, significantly increasing energy consumption.
[0003] Secondly, some construction machinery uses rotary cylinders to drive the bucket for fine-tuning of the angle, but this solution has obvious drawbacks. The rotation angle of the rotary cylinder is usually limited to ±90°, which is difficult to meet the multi-angle operation requirements under complex working conditions; at the same time, the piston rod of the rotary cylinder must directly bear the weight of the bucket and the digging resistance. Under heavy load operation, the piston rod is prone to bending deformation or even breakage, leading to equipment failure. Utility Model Content
[0004] To address the above problems, the purpose of this utility model is to provide an adjustable boom for construction machinery, which solves the problems of low efficiency and high energy consumption in narrow spaces due to the reliance on the movement of the whole machine for angle adjustment, and the limited angle and easy damage to piston rods in some rotary cylinder drive methods.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: an adjustable boom for engineering machinery, comprising a main boom body, a stick connecting part installed at the front end of the main boom body, a hydraulic rotating mechanism provided on the stick connecting part, the hydraulic rotating mechanism comprising a connecting seat, the connecting seat being fixed to the top of the bucket, a rotating seat being formed at the top of the connecting seat, the rotating seat being rotatably engaged with the stick connecting part, a connecting block being formed on the side of the connecting seat, the connecting block being rotatably connected to one end of the rotating arm via a pin, the other end of the rotating arm being rotatably connected to one end of a connecting rod via a pin, the other end of the connecting rod being rotatably connected to the stick connecting part via a pin, the middle end of the connecting rod being rotatably connected to one end of a hydraulic cylinder via a pin, and the other end of the hydraulic cylinder being rotatably connected to the stick connecting part via a pin.
[0006] The beneficial effects of this utility model are as follows: the hydraulic rotating mechanism can directly adjust the angle of the bucket for precise operation when the left and right translation angle of the main boom is small, without the need for the overall movement of the engineering equipment, thus reducing energy consumption; the hydraulic rotating mechanism has a larger rotation angle than the rotary cylinder, and the piston rod does not directly bear the load of the bucket, thus ensuring higher safety.
[0007] In order to effectively reduce the size of the hydraulic rotating mechanism and thus reduce its impact on the range of motion of the bucket; As a further improvement to the above technical solution: the rotating arm is an arc-shaped plate structure, and the inner diameter of the rotating arm is the same as the outer diameter of the connecting seat.
[0008] The beneficial effects of this improvement are: by increasing the curvature of the rotating arm, the total length of the hydraulic rotating mechanism is reduced, thereby reducing the volume of the hydraulic rotating mechanism while ensuring that the rotating arm plays a reliable connecting role.
[0009] In order to reduce the size of the hydraulic rotating mechanism while avoiding structural interference between the rotating arm and the connecting rod; As a further improvement to the above technical solution: the number of rotating arms is two and they are respectively arranged on the upper and lower sides of the connecting block, and the connecting rod is arranged between the upper and lower rotating arms.
[0010] The beneficial effect of this improvement is that when the connecting rod drives the rotating arm to move, it can move to the inside of the rotating arm, thus avoiding structural interference with the rotating arm.
[0011] In order to reduce the size of the hydraulic rotating mechanism while avoiding structural interference between the rotating arm and the oil cylinder; As a further improvement to the above technical solution: the cylinder body of the hydraulic cylinder is located between the upper and lower rotating arms.
[0012] The beneficial effect of this improvement is that when the hydraulic cylinder extends and retracts to drive the rotating arm to rotate, it will not come into contact with the rotating arm, thus avoiding structural interference with the Beman structure.
[0013] To ensure a stable connection between the rotating base and the boom; As a further improvement to the above technical solution: the rotating seat has a stepped cylindrical structure that is wider at the top and narrower at the bottom, and the stick connecting part is installed between the top of the rotating seat and the connecting seat.
[0014] The beneficial effects of this improvement are: the rotating seat, in conjunction with the connecting seat and the stick connection, achieves a stable rotational connection, ensuring the stability of the hydraulic rotating mechanism and the stick connection.
[0015] To ensure smooth rotation of the connector; As a further improvement to the above technical solution: thrust ball bearings are provided between the upper and lower end faces of the rotating seat, the connecting seat and the stick connection part, and the thrust ball bearings are fitted on the outside of the rotating seat.
[0016] The beneficial effects of this improvement are: the addition of a thrust ball bearing can reduce the resistance encountered when the connecting seat and rotating seat rotate relative to the stick connection, thereby ensuring smoothness when adjusting the bucket angle.
[0017] In order to effectively ensure the structural strength of the boom connection; As a further improvement to the above technical solution: the boom connection part includes a base plate and a connecting ear. There are two connecting ears, which are welded to the base plate. The connecting ear is rotatably connected to the main boom body and one end of the hydraulic cylinder installed on the main boom body through a pin. The base plate is provided with a slot for rotatably installing a rotating seat.
[0018] The beneficial effect of this improvement is that the boom connection can securely connect the main boom body and the hydraulic rotating mechanism.
[0019] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic diagram of the structure of the boom connection part in this utility model; Figure 4 This is a schematic diagram of the hydraulic rotating mechanism in this utility model; In the diagram: 1. Main boom body; 2. Stick connection part; 21. Base plate; 22. Connecting lug; 3. Hydraulic rotating mechanism; 31. Connecting seat; 32. Rotating seat; 33. Connecting block; 34. Rotating arm; 35. Connecting rod; 36. Hydraulic cylinder; 4. Bucket. Detailed Implementation
[0021] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.
[0022] Example 1: like Figure 1As shown in Figure 4: An adjustable boom for engineering machinery includes a main boom body 1. A stick connection part 2 is installed at the front end of the main boom body 1. A hydraulic rotating mechanism 3 is provided on the stick connection part 2. The hydraulic rotating mechanism 3 includes a connecting seat 31, which is fixed to the top of the bucket 4. A rotating seat 32 is formed at the top of the connecting seat 31 and is rotatably engaged with the stick connection part 2. A connecting block 33 is formed on the side of the connecting seat 31. The connecting block 33 is rotatably connected to one end of a rotating arm 34 via a pin. The other end of the rotating arm 34 is rotatably connected to one end of a connecting rod 35 via a pin. The other end of the connecting rod 35 is rotatably connected to the stick connection part 2 via a pin. The middle end of the connecting rod 35... One end of the hydraulic cylinder 36 is rotatably connected via a pin, and the other end of the hydraulic cylinder 36 is rotatably connected to the boom connecting part 2 via a pin. Driving the hydraulic rotating mechanism 3 allows for precise operation by directly adjusting the angle of the bucket 4 when the left and right translation angle of the main boom 1 is small, eliminating the need for overall equipment movement and reducing energy consumption. Compared to a rotary cylinder, the hydraulic rotating mechanism 3 has a larger rotation angle, and the piston rod does not directly bear the load of the bucket 4, resulting in higher safety. The rotating arm 34 has an arc-shaped plate structure, and its inner diameter is the same as the outer diameter of the connecting seat 31. By increasing the curvature of the rotating arm 34, the overall length of the hydraulic rotating mechanism 3 is reduced, ensuring reliable connection while minimizing its size. There are two of the 4 components, which are respectively located on the upper and lower sides of the connecting block 33. The connecting rod 35 is located between the upper and lower rotating arms 34. When the connecting rod 35 drives the rotating arm 34 to move, it can move to the inner side of the rotating arm 34 to avoid structural interference with the rotating arm 34. The cylinder body of the hydraulic cylinder 36 is located between the upper and lower rotating arms 34. When the hydraulic cylinder 36 extends and retracts to drive the rotating arm 34 to rotate, it will not contact the rotating arm 34 to avoid structural interference. The rotating seat 32 has a stepped cylindrical structure that is wider at the top and narrower at the bottom. The stick connecting part 2 is installed between the top of the rotating seat 32 and the connecting seat 31. The rotating seat 32, together with the connecting seat 31, and the stick connecting part 2 achieve a stable rotational connection, ensuring the hydraulic rotating mechanism 3 and the stick connecting part are securely connected. 2. For the stability of the connection, thrust ball bearings are provided between the upper and lower end faces of the rotating seat 32, the connecting seat 31 and the stick connection part 2, and the thrust ball bearings are fitted on the outside of the rotating seat 32. The provision of thrust ball bearings can reduce the resistance encountered by the connecting seat 31 and the rotating seat 32 when rotating relative to the stick connection part 2, thereby ensuring the smoothness of the bucket 4 angle adjustment. The stick connection part 2 includes a base plate 21 and a connecting ear 22. There are two connecting ears 22, which are welded to the base plate 21. The connecting ear 22 is rotatably connected to the main boom body 1 and one end of the hydraulic cylinder provided on the main boom body 1 through a pin. The base plate 21 has a slot for rotatably installing the rotating seat 32. The stick connection part 2 can stably connect the main boom body 1 and the hydraulic rotating mechanism 3.
[0023] The working principle of this technical solution is as follows: When the construction machinery is started, the main boom 1 is driven by a hydraulic cylinder to perform lifting, extending, and retracting movements, achieving a wide-range spatial positioning of the bucket 4. At this time, the hydraulic rotating mechanism 3 is in its initial state, and the bucket 4 and the main boom 1 work together to complete routine operations such as digging and loading. When fine-tuning of the bucket 4 is required, such as precise digging in narrow spaces or wall leveling operations, the hydraulic cylinder 36 of the hydraulic rotating mechanism 3 is activated. The piston rod of the cylinder 36 extends or retracts, pushing the connecting rod 35 to rotate around the connection point, thereby driving the rotating arm 34 to swing around the connecting block 33. The swing of the rotating arm 34 is transmitted to the bucket 4 through the connecting seat 31, achieving independent angular rotation of the bucket 4 relative to the boom connection 2 without moving the main boom 1 or the entire machine. According to the operational requirements, the extension and retraction of the hydraulic cylinder 36 can be adjusted by operating the hydraulic system control valve, enabling flexible rotation of the bucket 4 within a range of ±180°. During the adjustment process, the operator can observe the angle change data of the bucket 4 in real time through the equipment instrument panel to ensure operational accuracy.
[0024] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the invention; these examples are merely for the purpose of helping to understand the method and core ideas of the invention. The above descriptions are only preferred embodiments of the invention. It should be pointed out that, due to the limitations of written expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or variations can be made without departing from the principles of the invention, and the above technical features can be combined in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this invention.
Claims
1. An adjustable boom for engineering machinery, characterized in that: The device includes a main boom body (1), a stick connection part (2) is installed at the front end of the main boom body (1), a hydraulic rotating mechanism (3) is provided on the stick connection part (2), the hydraulic rotating mechanism (3) includes a connecting seat (31), the connecting seat (31) is fixed on the top of the bucket (4), a rotating seat (32) is formed at the top of the connecting seat (31), the rotating seat (32) is rotatably clamped on the stick connection part (2), a connecting block (33) is formed on the side of the connecting seat (31), the connecting block (33) is rotatably connected to one end of the rotating arm (34) by a pin, the other end of the rotating arm (34) is rotatably connected to one end of the connecting rod (35) by a pin, the other end of the connecting rod (35) is rotatably connected to the stick connection part (2) by a pin, the middle end of the connecting rod (35) is rotatably connected to one end of the oil cylinder (36) by a pin, and the other end of the oil cylinder (36) is rotatably connected to the stick connection part (2) by a pin.
2. The adjustable boom for engineering machinery according to claim 1, characterized in that: The rotating arm (34) is an arc-shaped plate structure, and the inner diameter of the rotating arm (34) is the same as the outer diameter of the connecting seat (31).
3. The adjustable boom for engineering machinery according to claim 1, characterized in that: The number of rotating arms (34) is two and they are respectively arranged on the upper and lower sides of the connecting block (33), and the connecting rod (35) is arranged between the upper and lower rotating arms (34).
4. The adjustable boom for engineering machinery according to claim 1, characterized in that: The cylinder body of the hydraulic cylinder (36) is located between the upper and lower rotating arms (34).
5. The adjustable boom for engineering machinery according to claim 1, characterized in that: The rotating seat (32) has a stepped cylindrical structure that is wider at the top and narrower at the bottom. The stick connecting part (2) is installed between the top of the rotating seat (32) and the connecting seat (31).
6. The adjustable boom for engineering machinery according to claim 1, characterized in that: Thrust ball bearings are provided between the upper and lower end faces of the rotating seat (32), the connecting seat (31) and the stick connecting part (2), and the thrust ball bearings are fitted on the outside of the rotating seat (32).
7. The adjustable boom for engineering machinery according to claim 1, characterized in that: The boom connection part (2) includes a base plate (21) and a connecting ear (22). There are two connecting ears (22) and they are welded to the base plate (21). The connecting ear (22) is rotatably connected to the main boom body (1) and one end of the oil cylinder provided on the main boom body (1) through a pin. The base plate (21) has a slot for rotatably installing a rotating seat (32).