Arm frame joint of truss arm

Abstract

The utility model relates to the technical field of engineering mechanical equipment, in particular to a truss arm frame connector which comprises an upper truss arm body and a lower truss arm body, a plurality of stand columns are fixedly installed on the truss arm bodies, rectangular protruding blocks are fixedly installed at the top ends and the bottom ends of the stand columns, and conical half holes are formed in the side faces of the rectangular protruding blocks. A center plate is arranged between the two truss arm bodies, a left fixing support and a right fixing support are installed at the two ends of the center plate respectively, rectangular holes are formed in the fixing supports, every two vertically-adjacent rectangular protruding blocks are matched with the corresponding rectangular holes in an inserted mode, each fixing piece comprises a conical column, and the conical columns are matched with the left conical half hole and the right conical half hole in an inserted mode. A cylindrical rod penetrating out of the fixed support is installed at one end of the conical column, a limiting disc is installed at the end of the cylindrical rod, a stud penetrating out of the fixed support is installed at the other end of the conical column, and a nut is connected to the stud in a threaded mode. The fixing device is firm and stable in structure, not prone to loosening and capable of achieving good fixing and supporting effects.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery and equipment technology, and more specifically, to a truss boom joint. Background Technology

[0002] In various engineering operations, truss booms are widely used in equipment such as cranes and aerial work platforms to lift heavy objects or perform high-altitude operations for personnel. As a key component connecting different boom segments, the performance of the truss boom joint directly affects the stability and reliability of the entire truss boom structure.

[0003] Traditional truss boom joints have several drawbacks. Firstly, common joint connection methods include bolting or welding. Bolted connections are prone to loosening under long-term exposure to complex alternating loads, leading to decreased connection strength and safety hazards. Furthermore, when using bolts, the load-bearing capacity is concentrated on the bolt itself, which has limited strength and load-bearing capacity, making it susceptible to breakage. Secondly, while welded joints offer advantages in connection strength, the welding process generates thermal stress, potentially altering the microstructure and properties of the boom material, reducing its toughness and fatigue strength. Moreover, repairs to welded joints are difficult, often requiring re-welding of the entire welded area or replacement of the entire joint component, consuming significant manpower, resources, and time. Therefore, we propose a new truss boom joint. Utility Model Content

[0004] The purpose of this utility model is to provide a truss boom joint to solve the defects mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A truss boom joint includes two symmetrical truss boom bodies, one above the other. Multiple columns are fixedly mounted on each truss boom body. Rectangular protrusions are fixedly mounted at the top and bottom of each column. Conical semi-holes are provided on the sides of each rectangular protrusion, with the upper and lower conical semi-holes facing opposite directions. A center plate is provided between the two truss boom bodies. Two symmetrical fixed supports are fixedly mounted at both ends of the center plate. Rectangular holes are provided within each fixed support. Two adjacent rectangular protrusions are inserted into the corresponding rectangular holes. A fixing element is provided within each fixed support. The fixing element includes a conical column, which is inserted into the two conical semi-holes. A cylindrical rod extending through the fixed support is fixedly mounted at one end of the conical column. A limit plate is fixedly mounted at the end of the cylindrical rod. A stud extending through the fixed support is fixedly mounted at the other end of the conical column. A nut is threaded onto the stud.

[0007] Preferably, the dimensions of the two rectangular protrusions are adapted to the dimensions of the rectangular hole, and the fixed support and the center plate are integrally formed.

[0008] Preferably, the conical half-hole is in the shape of a half-frustum, and when the two rectangular protrusions are closed, the two conical half-holes together form a complete frustum.

[0009] Preferably, the inner diameter of the conical semi-hole decreases sequentially from front to back, and the size of the conical column is adapted to the size of the two conical semi-holes.

[0010] Preferably, a rear through hole is provided on the rear side wall of the rectangular hole, and a front through hole is provided on the front side wall of the rectangular hole. The cylindrical rod passes through the rear through hole, and the stud passes through the front through hole.

[0011] Preferably, a hexagonal protrusion is fixedly installed on the end face of the limiting plate, and the cross-section of the hexagonal protrusion is hexagonal.

[0012] Preferably, an elastic washer is fitted on the stud, the nut presses the elastic washer against one side of the fixed support, and the limiting disc abuts against the other side of the fixed support.

[0013] Preferably, the outer diameter of the limiting plate is larger than the diameter of the rear through hole, and the cross-section of the nut is also hexagonal.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model achieves the initial positioning connection between the truss arm bodies by setting up symmetrical upper and lower truss arm main bodies and rectangular protrusions on the columns, which are then inserted into the rectangular holes in the fixed supports at both ends of the center plate. This achieves the effect of quickly assembling the truss arm structure and ensuring accurate connection position.

[0016] 2. This utility model achieves a firm lock on the connection by using the insertion of the tapered column and the tapered half-hole in the fixing component, as well as the synergistic effect of the cylindrical rod, the limiting plate, the stud and the nut. The elastic washer can prevent the nut from loosening. The tapered column limits the rectangular protrusion, so that the force can be applied to the tapered column. The tapered column has better strength and greater load-bearing capacity, which achieves the effect of enhancing the connection strength of the joint, being able to withstand a large load, and ensuring the stable operation of the truss arm. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a partial structural schematic diagram of the present invention;

[0021] The meanings of the labels in the diagram are as follows:

[0022] 1. Truss arm main body; 10. Column; 11. Rectangular protrusion; 12. Conical semi-hole;

[0023] 2. Center plate; 20. Fixed support; 21. Rectangular hole; 22. Rear through hole; 23. Front through hole;

[0024] 3. Fixing component; 30. Conical column; 31. Cylindrical rod; 32. Limiting plate; 33. Hexagonal protrusion; 34. Stud; 35. Elastic washer; 36. Nut. Detailed Implementation

[0025] 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.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Please see Figures 1-4 This utility model provides a technical solution: a truss arm boom joint, including two symmetrical truss arm bodies 1, with multiple columns 10 fixedly installed on the truss arm body 1, and rectangular protrusions 11 fixedly installed at the top and bottom of the columns 10, so that the truss arm body 1 has a basic structure for connecting with other components.

[0028] Specifically, a tapered half-hole 12 is provided on the side of the rectangular protrusion 11, with the upper and lower tapered half-holes 12 facing opposite directions. A center plate 2 is provided between the two truss arm bodies 1, and two symmetrical fixed supports 20 are fixedly installed at both ends of the center plate 2. A rectangular hole 21 is provided in the fixed support 20, and the two adjacent rectangular protrusions 11 are inserted into the corresponding rectangular holes 21. A fixing element 3 is provided in the fixed support 20, which includes a tapered column 30. The tapered column 30 is inserted into the two tapered half-holes 12. The size of the tapered column 30 is larger than that of a general bolt, which improves the load-bearing capacity of the tapered column 30 and makes it less prone to breakage. This design achieves further locking of the connection part of the truss arm body 1, greatly enhances the firmness of the connection, effectively prevents the relative displacement of the connection part under stress, and improves the load-bearing capacity of the entire truss arm joint. Moreover, the tapered column 30 can be made of carburized steel, which has good hardness, can bear large loads, is not prone to breakage, and helps to ensure the stability of the overall structure.

[0029] Specifically, a cylindrical rod 31 is fixedly installed at one end of the tapered column 30, extending through the fixed support 20. A limiting plate 32 is fixedly installed at the end of the cylindrical rod 31. A stud 34 is fixedly installed at the other end of the tapered column 30, extending through the fixed support 20. A nut 36 is threaded onto the stud 34, so that the fixing member 3 can be firmly installed in the fixed support 20. The limiting plate 32 and the nut 36 limit the fixing member 3 from both sides to prevent it from coming out during operation, further ensuring the stability of the joint connection.

[0030] In this embodiment, the dimensions of the two rectangular protrusions 11 are adapted to the dimensions of the rectangular hole 21, so that the two rectangular protrusions 11 after being closed can be stably inserted into the rectangular hole 21, which can prevent loosening or shaking; the fixed support 20 and the center plate 2 are integrally formed, which ensures that the structure between the fixed support 20 and the center plate 2 is more solid and stable.

[0031] Specifically, the conical half-hole 12 is in the shape of a half-frustum. After the two rectangular protrusions 11 are closed, the two conical half-holes 12 together form a complete frustum. The inner diameter of the conical half-hole 12 decreases from front to back. The size of the conical column 30 is adapted to the size of the two conical half-holes 12. After the conical column 30 is inserted, it can limit the operation between the two rectangular protrusions 11 on the left and right sides, and further fix the two truss arm bodies 1.

[0032] Furthermore, a rear through hole 22 is provided on the rear side wall of the rectangular hole 21, and a front through hole 23 is provided on the front side wall of the rectangular hole 21. The cylindrical rod 31 passes through the rear through hole 22, and the stud 34 passes through the front through hole 23 for normal assembly operations.

[0033] In addition, a hexagonal protrusion 33 is fixedly installed on the end face of the limiting plate 32. The cross-section of the hexagonal protrusion 33 is hexagonal, and the cross-section of the nut 36 is also hexagonal. This makes it easier for operators to use the corresponding tools to operate the limiting plate 32 and the nut 36. During installation and disassembly, torque can be applied more conveniently, which improves the efficiency of installation and maintenance.

[0034] It is worth noting that an elastic washer 35 is fitted on the stud 34, and the nut 36 presses the elastic washer 35 against one side of the fixed support 20. The limiting plate 32 abuts against the other side of the fixed support 20. The outer diameter of the limiting plate 32 is larger than the diameter of the rear through hole 22, so that the elastic washer 35 can play a role in buffering and preventing loosening. During the operation of the truss arm, when subjected to vibration and impact, the elastic washer 35 can absorb some energy, reduce the risk of loosening of the connection, and extend the service life of the joint.

[0035] When using the truss arm boom joint of this utility model, first, the upper and lower truss arm bodies 1 are positioned, and then the center plate 2 is placed between the two truss arm bodies 1, so that the fixed supports 20 at both ends of the center plate 2 correspond to the rectangular protrusions 11 of the truss arm body 1.

[0036] Subsequently, the adjacent rectangular protrusions 11 are aligned and inserted into the rectangular holes 21 in the fixed support 20. Since the rectangular protrusions 11 and the rectangular holes 21 are size-matched, the stability of the initial connection can be ensured, and loosening and shaking can be reduced. After that, the conical post 30 of the fastener 3 is inserted into the complete frustum-shaped conical half hole 12 formed by the two rectangular protrusions 11 closing together along the rear through hole 22, so as to further lock the connection part.

[0037] Next, the operating tool uses the hexagonal protrusion 33 and nut 36 on the limiting plate 32 to tighten the nut 36 onto the stud 34. At the same time, the limiting plate 32 abuts against the other side of the fixed support 20, thereby firmly installing the fastener 3 into the fixed support 20 and completing the fixed installation operation between the upper and lower truss arm bodies 1.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A truss arm boom joint comprising two mutually symmetrical truss arm bodies (1) above and below each other, characterized in that: The truss arm body (1) is fixedly installed with a plurality of columns (10), the top and bottom ends of the column (10) are fixedly installed with a rectangular protrusion (11), the side of the rectangular protrusion (11) is provided with a tapered half hole (12), the upper and lower two tapered half holes (12) are opposite in direction, the two truss arm bodies (1) are provided with a center plate (2), the two ends of the center plate (2) are fixedly installed with two mutually symmetrical fixed supports (20), the fixed support (20) is provided with a rectangular hole (21), the upper and lower two rectangular protrusions (11) and the corresponding rectangular hole (21) are inserted and matched, the fixed support (20) is provided with a fixing piece (3), the fixing piece (3) comprises a tapered column (30), the tapered column (30) is inserted and matched with the left and right two tapered half holes (12), one end of the tapered column (30) is fixedly installed with a cylindrical rod (31) penetrating out of the fixed support (20), the end of the cylindrical rod (31) is fixedly installed with a limiting disc (32), the other end of the tapered column (30) is fixedly installed with a threaded column (34) penetrating out of the fixed support (20), the threaded column (34) is threadedly connected with a nut (36).

2. The truss arm arm rack joint of claim 1, wherein: The size of the two rectangular protrusions (11) is matched with the size of the rectangular hole (21), the fixed support (20) and the center plate (2) are an integral molding structure.

3. The truss arm arm rack joint of claim 1, wherein: The tapered half hole (12) is a half circular table, and the two tapered half holes (12) jointly form a complete circular table after the two rectangular protrusions (11) are folded.

4. The truss arm arm rack joint of claim 3, wherein: The inner diameter of the tapered half hole (12) decreases from front to back, and the size of the tapered column (30) is matched with the size of the two tapered half holes (12).

5. The truss arm arm rack joint of claim 1, wherein: The rear side hole wall of the rectangular hole (21) is provided with a rear through hole (22), the front side hole wall of the rectangular hole (21) is provided with a front through hole (23), the cylindrical rod (31) penetrates out from the rear through hole (22), and the threaded column (34) penetrates out from the front through hole (23).

6. The truss arm arm rack joint of claim 5, wherein: The end face of the limiting disc (32) is fixedly installed with a hexagonal protrusion (33), and the cross section of the hexagonal protrusion (33) is hexagonal.

7. The truss arm arm rack joint of claim 6, wherein: The threaded column (34) is provided with an elastic washer (35), the nut (36) presses the elastic washer (35) against one side of the fixed support (20), and the limiting disc (32) abuts against the other side of the fixed support (20).

8. The truss arm arm rack joint of claim 7, wherein: The outer diameter of the limiting disc (32) is greater than the hole diameter of the rear through hole (22), and the cross section of the nut (36) is also hexagonal.

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