Improved connecting bolt for crown block safety hydraulic brake base

Abstract

The utility model relates to an improved connecting bolt for a crown block safety hydraulic brake base, and belongs to the technical field of connecting bolts. Comprising a connecting bolt body, an inserting hole is formed in the lower surface of the connecting bolt body, limiting grooves are formed in the two sides of the inserting hole, a bearing rod is movably installed in the inserting hole, limiting blocks matched with the limiting grooves in size are integrally arranged on the two sides of the bearing rod, and a connecting rod is integrally arranged at the lower end of the bearing rod; the connecting rod is welded to the lower end of the connecting bolt body, the outer side of the connecting rod is sleeved with a nut in a welded mode, and the outer diameter of the nut is smaller than the bottom diameter of the connecting bolt body. Rotation of the large-size connecting bolt body can be controlled through the small-size nut, the problem that a large-size bolt is inconvenient to operate is solved to a certain extent, the large-size connecting bolt has great advantages under the condition that space is limited, daily maintenance operation is facilitated, maintenance time can be shortened, and maintenance efficiency is improved. And continuity and reliability of normal production can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting bolts, in particular to an improved connecting bolt used for a crown crane safety hydraulic brake base. Background Art

[0002] The crane safety hydraulic brake is a safety device for industrial cranes. It uses the hydraulic system to achieve the braking function. When fixed, the crane safety hydraulic brake base is connected to the crane using connecting bolts. As a key component in the crane safety hydraulic brake structure, the reliability of the connecting bolt has a decisive influence on the stability and efficiency of the entire crane safety hydraulic brake.

[0003] The connecting bolts used in the existing safety hydraulic brake base are M56-type connecting bolts. The M56-type connecting bolts have a diameter of 56 mm and can provide a stable connection force between the safety hydraulic brake base and the overhead crane.

[0004] However, due to the large size of the M56 connecting bolts, when tightening the connecting bolts, the maintenance area is small and the operation is inconvenient, making it difficult for workers to rotate them manually or using tools, causing difficulties in daily maintenance work and excessively long maintenance time, affecting normal production. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an improved connecting bolt for the base of the overhead crane safety hydraulic brake. The technical solution of the utility model is as follows:

[0006] An improved connecting bolt for a crane safety hydraulic brake base comprises a connecting bolt body, a socket is provided on the lower surface of the connecting bolt body, limiting grooves are provided on both sides of the socket, a receiving rod is movably installed inside the socket, limiting blocks matching the size of the limiting grooves are integrally provided on both sides of the receiving rod, a connecting rod is integrally provided at the lower end of the receiving rod, and the connecting rod is welded to the lower end of the connecting bolt body, a nut is welded on the outer side of the connecting rod, and the outer diameter of the nut is smaller than the bottom diameter of the connecting bolt body.

[0007] Optionally, the diameter of the socket is between one half and one third of the diameter of the connecting bolt body.

[0008] Optionally, the depth of the socket is between one quarter and one fifth of the overall length of the connecting bolt body.

[0009] Optionally, the two groups of limit blocks are symmetrically arranged.

[0010] Optionally, the receiving rod, the limiting block and the connecting rod are an integral cast structure.

[0011] Optionally, a threaded buckle matching the inner thread of the nut is provided on the outer side of the connecting rod.

[0012] Optionally, an upper welding area is provided on the outer side of the connecting rod and above the threaded buckle, and a lower welding area is provided on the outer side of the connecting rod and below the threaded buckle.

[0013] All the above optional technical solutions can be combined arbitrarily, and the present utility model does not provide detailed descriptions of the structures after the combinations.

[0014] By means of the above scheme, the beneficial effects of the utility model are as follows:

[0015] 1. By setting a receiving rod, a connecting rod and a nut, a nut is welded to the bottom of the original connecting bolt body through the receiving rod and the connecting rod, and the outer diameter of the nut is set to be smaller than the bottom diameter of the connecting bolt body, so that when the utility model is in use, a standard wrench can be used to easily turn the nut, thereby driving the connecting bolt body to rotate. This structure provides a new torque transmission method, that is, by turning a small-sized nut to control the rotation of a large-sized connecting bolt body, which to a certain extent solves the problem of inconvenient operation of large-sized bolts and has great advantages under limited space; at the same time, without changing the structure of the brake base, it is convenient for daily maintenance operations and reduces the labor intensity of workers; in addition, it can also shorten the maintenance time, which helps to ensure the continuity and reliability of normal production.

[0016] 2. Using the integrated column formed by the receiving rod and the connecting rod to fix the nut and the connecting bolt body can ensure that the nut and the connecting bolt body can be tightly combined after welding, thus forming a highly reliable connection. Through welding, the receiving rod and the connecting rod can be firmly fixed together to ensure that they will not loosen or shift, and ensure that when the nut is given a rotational force, a stable torque transmission force can be applied to the connecting bolt body.

[0017] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall appearance structure of the improved connecting bolts for the overhead crane safety hydraulic brake base provided by the utility model;

[0019] Figure 2 A schematic diagram of the exploded structure of the improved connecting bolts for the overhead crane safety hydraulic brake base provided by the utility model;

[0020] Figure 3 It is a schematic diagram of the side section structure of the connecting bolt body in the utility model;

[0021] Figure 4 It is a schematic diagram of the structure in which the receiving rod, the connecting rod and the nut cooperate with each other in the utility model.

[0022] Numbers in the figure: 1, connecting bolt body; 11, socket; 12, limit groove; 2, receiving rod; 21, limit block; 3, connecting rod; 31, threaded buckle; 32, upper welding area; 33, lower welding area; 4, nut. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] See also Figure 1-4 As shown, the utility model provides an improved connecting bolt for a safety hydraulic brake base of an overhead crane, comprising a connecting bolt body 1, a socket 11 is provided on the lower surface of the connecting bolt body 1, limiting grooves 12 are provided on both sides of the socket 11, a receiving rod 2 is movably installed inside the socket 11, limiting blocks 21 matching the size of the limiting grooves 12 are integrally provided on both sides of the receiving rod 2, a connecting rod 3 is integrally provided at the lower end of the receiving rod 2, and the connecting rod 3 is welded to the lower end of the connecting bolt body 1, a nut 4 is welded on the outer side of the connecting rod 3, and the outer diameter of the nut 4 is smaller than the bottom diameter of the connecting bolt body 1.

[0025] That is to say, the utility model welds a nut 4 at the bottom of the original connecting bolt body 1, so that the connecting bolt body 1 can be driven to rotate by twisting the nut 4. In this way, it is possible to indirectly control the rotation of the large-sized connecting bolt body 1 by operating the small-sized nut 4 when it is inconvenient to directly operate the large-sized connecting bolt body 1; the receiving rod 2 and the connecting rod 3 are used as a connecting medium between the connecting nut 4 and the connecting bolt body 1 as a whole, and the welding method can ensure that they can effectively mesh together to achieve stable torque transmission.

[0026] Furthermore, the diameter of the socket 11 is between one half and one third of the diameter of the connecting bolt body 1, which can ensure that the strength of the connecting bolt body 1 is not excessively weakened. Secondly, the outer shape of the socket 11 is set to be circular, which can ensure that the influence of the shape of the socket 11 on the strength of the connecting bolt body 1 is minimized.

[0027] Furthermore, the depth of the socket 11 is between one quarter and one fifth of the overall length of the connecting bolt body 1 , which can ensure that when the receiving rod 2 is inserted into the socket 11 , there is sufficient contact area to support the load and can minimize the impact on the strength of the connecting bolt body 1 .

[0028] Furthermore, the two groups of limit blocks 21 are symmetrically arranged, and this design can effectively limit the movement of the receiving rod 2 and ensure that the overall strength of the connecting bolt body 1 will not be affected. The two groups of symmetrically arranged limit blocks 21 can provide a more stable limit effect while maintaining the structural integrity of the connecting bolt body 1. The limit blocks 21 cooperate with the limit grooves 12, so that when the receiving rod 2 rotates, the connecting bolt body 1 can be driven to rotate synchronously through the limit blocks 21, thereby effectively avoiding the possibility of relative rotation.

[0029] Furthermore, the receiving rod 2, the limit block 21 and the connecting rod 3 are an integrally cast structure, ensuring that the connecting bolt body 1 and the nut 4 are in a firmly connected state after assembly, thereby achieving stable torque transmission, effectively reducing the possibility of breakage of the connecting bolt body 1, and improving the reliability and safety of the overall structure.

[0030] Furthermore, a threaded buckle 31 matching the inner thread of the nut 4 is provided on the outer side of the connecting rod 3. During assembly, the nut 4 can be first threadedly sleeved on the outer side of the connecting rod 3, and then welded using a welding gun. This structure helps to accurately position the nut 4; at the same time, the bite force generated during the thread engagement process enhances the integration of the nut 4 and the connecting rod 3, thereby improving the stability and reliability of the connection.

[0031] Furthermore, an upper welding area 32 is provided on the outer side of the connecting rod 3 and above the threaded buckle 31, and a lower welding area 33 is provided on the outer side of the connecting rod 3 and below the threaded buckle 31. The upper welding area 32 and the lower welding area 33 are used for welding and fixing the nut 4 and the connecting rod 3, providing welding space to ensure the stability of the overall structure.

[0032] Working principle: The first step is to assemble the connecting bolt. First, insert the receiving rod 2 into the socket 11. During this process, the limit block 21 needs to be fitted and inserted into the limit groove 12. After the receiving rod 2 is fully inserted into the socket 11, use a welding gun to weld and fix the upper welding area 32 of the connecting rod 3 and the bottom end of the connecting bolt body 1. After the connecting rod 3 and the connecting bolt body 1 are welded and fixed, the nut 4 is threadedly sleeved on the outside of the threaded buckle 31. Similarly, use a welding gun to weld and fix the upper welding area 32 of the connecting rod 3 and the side of the nut 4 close to the upper welding area 32, and weld and fix the lower welding area 33 of the connecting rod 3 and the side of the nut 4 close to the lower welding area 33; the second step is to disassemble and assemble the connecting bolt body 1, use a standard wrench to easily turn the nut 4, and the connecting bolt body 1 can be conveniently rotated.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. An improved connecting bolt for a crane safety hydraulic brake base, characterized in that: The invention comprises a connecting bolt body (1), wherein a socket (11) is provided on the lower surface of the connecting bolt body (1), and limit grooves (12) are provided on both sides of the socket (11), a receiving rod (2) is movably installed inside the socket (11), and limit blocks (21) matching the size of the limit grooves (12) are integrally provided on both sides of the receiving rod (2), a connecting rod (3) is integrally provided at the lower end of the receiving rod (2), and the connecting rod (3) is welded to the lower end of the connecting bolt body (1), and a nut (4) is welded on the outer side of the connecting rod (3), and the outer diameter of the nut (4) is smaller than the bottom diameter of the connecting bolt body (1).

2. The improved connecting bolt for the safety hydraulic brake base of an overhead crane according to claim 1, characterized in that: The diameter of the insertion hole (11) is between one half and one third of the diameter of the connecting bolt body (1).

3. The improved connecting bolt for the safety hydraulic brake base of an overhead crane according to claim 1, characterized in that: The depth of the insertion hole (11) is between one quarter and one fifth of the overall length of the connecting bolt body (1).

4. The improved connecting bolt for the safety hydraulic brake base of an overhead crane according to claim 1, characterized in that: The two groups of limit blocks (21) are symmetrically arranged.

5. The improved connecting bolt for the safety hydraulic brake base of an overhead crane according to claim 1, characterized in that: The receiving rod (2), the limiting block (21) and the connecting rod (3) are an integrated cast structure.

6. The improved connecting bolt for the safety hydraulic brake base of an overhead crane according to claim 1, characterized in that: The outer side of the connecting rod (3) is provided with a thread buckle (31) matching the inner thread of the nut (4).

7. The improved connecting bolt for the safety hydraulic brake base of an overhead crane according to claim 6, characterized in that: An upper welding area (32) is provided on the outer side of the connecting rod (3) and located above the threaded buckle (31), and a lower welding area (33) is provided on the outer side of the connecting rod (3) and located below the threaded buckle (31).

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