Fastening bolt for split type axle box body

Abstract

The fastening bolt comprises a bolt head, a bolt column, a nut, a fastening structure, a fastening ring, a positioning rod, a first magnetic attraction block, a spring and a limiting block, the bottom of the bolt head is fixedly connected with the bolt column, external threads are arranged on the outer wall of the bolt column, a threaded hole is formed in the nut, and the fastening structure is arranged in the threaded hole. The nut is in threaded connection with the bolt column through a threaded hole, a fastening structure is arranged on the side face of the nut and located outside the bolt column, the fastening structure comprises a fastening ring, positioning rods, first magnetic attraction blocks, springs and limiting blocks, the positioning rods are symmetrically arranged on the fastening ring, the first magnetic attraction blocks are installed at the tail ends of the two positioning rods, and the limiting blocks are arranged on the two sides of the bolt column. According to the axle box body, the firmness of the fastening bolt can be improved, the falling-off phenomenon is further avoided, and therefore the service life of the axle box body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to the technical field of fastening bolts for split axle boxes. Background Art

[0002] The axle box is an important component of the EMU bogie. It is a movable joint connecting the wheel set and the frame, which can be used to conduct the traction force, braking force, lateral force and vertical force during the running of the EMU, and realize the directional relative movement between the wheel set and the frame.

[0003] Most of the connections of split axle boxes are fixed by bolts and nuts. When fixing split axle boxes, fastening bolts are required. Fastening bolts are commonly used connectors. However, the heads of fastening bolts are usually hexagonal prisms or square prisms. According to the principle that metal corrosion originates from nodes, the places with edges and corners on the metal are easily oxidized, and thus are easily corroded by external moisture, resulting in the inability to screw out the bolts with external tools. Only destructive measures can be taken to remove them, but this will cause waste of resources and is time-consuming and laborious.

[0004] To solve the problems raised in the background art, for example, the fastening bolt disclosed in the application number CN201120059403.5 includes a threaded rod, a smooth rod and a head connected integrally in sequence. The head is a cylinder, and a limiting rod is axially welded on the circumferential surface of the head. By making the head of the bolt cylindrical, there are no protruding edges and corners on the head of this cylindrical bolt, so there are no corrosion nodes, and thus the head of the bolt is not easy to rust, which can extend the service life of the bolt. At the same time, an axial limiting rod is welded on the outer circumferential surface of the head. Therefore, only a limiting groove needs to be reserved on the preset object, and then the limiting rod on the head of the bolt can be placed in the limiting groove. By using the limiting function of the limiting rod, a wrench is used to screw on or unscrew the nut at the other end of the bolt, and the installation and disassembly of the bolt can be completed. However, this structure still has the following defects:

[0005] Although this structure makes the head of the bolt cylindrical and can make the head of the bolt not easy to rust, when this bolt is used for split axle boxes, due to the long-term influence of external vibration factors on the axle boxes, the phenomenon of insecure installation is likely to occur, and then it will fall off, thus affecting the use of the axle boxes and easily causing potential safety hazards. Summary of the Invention

[0006] The purpose of the utility model is to solve the problems in the prior art, and provide a fastening bolt for split axle boxes, which can improve the firmness of the fastening bolt, thereby avoiding the phenomenon of falling off, and extending the service life of the axle box.

[0007] To achieve the above object, the present utility model provides a fastening bolt for a split axle box body, which includes a bolt head, a bolt column, a nut, a fastening structure, a fastening ring, a positioning rod, a first magnetic attraction block, a spring, and a limiting block. The bottom of the bolt head is fixedly connected to the bolt column. An external thread is provided on the outer wall of the bolt column. A threaded hole is provided on the nut. The nut is threadedly connected to the bolt column through the threaded hole. A fastening structure is provided on the side surface of the nut and outside the bolt column. The fastening structure includes a fastening ring, a positioning rod, a first magnetic attraction block, a spring, and a limiting block. The positioning rods are symmetrically arranged on the fastening ring. The first magnetic attraction blocks are installed at the ends of the two positioning rods. Springs are provided on the side walls of the positioning rods. One end of each spring is connected to a limiting block.

[0008] Preferably, positioning holes adapted to the positioning rods are symmetrically provided on the nut, and both of the positioning holes penetrate through the inside of the nut.

[0009] Preferably, second magnetic attraction blocks magnetically attracted to the first magnetic attraction blocks are installed on the inner bottom walls of the positioning holes.

[0010] Preferably, limiting grooves adapted to the limiting blocks are provided on one side of each of the positioning holes, and the two limiting grooves are symmetrically arranged.

[0011] Preferably, holes are symmetrically formed in the side wall of the nut, and both of the holes penetrate through the inside of the nut and communicate with the positioning holes. The aperture of the holes is smaller than the aperture of the positioning holes.

[0012] Preferably, anti-rust layers are coated on the outer surfaces of the bolt head, the bolt column, and the nut, and the anti-rust layers are epoxy resin coatings.

[0013] The beneficial effects of the present utility model:

[0014] 1. By using the fastening structure, positioning holes, and limiting grooves in cooperation, the utility model can improve the fastening property of the bolt. After installing the bolt column on the equipment, the nut is threadedly installed on the bolt column to fasten two objects. Then, align the two positioning rods on the fastening ring with the positioning holes on the nut, and insert the positioning rods into the positioning holes. During the insertion process, the spring on one side of the positioning rod is compressed and contracted, driving the limiting block to move closer inward until the positioning rod is completely inserted into the positioning hole. Since the first magnetic block is installed at the end of the positioning rod, the first magnetic block and the second magnetic block in the positioning hole are magnetically attracted to complete the preliminary fixation. At the same time, the spring on the positioning rod resets, and the spring drives the limiting block to extend, and the limiting block is then clamped into the limiting groove in the positioning hole to complete the secondary fixation, thus completing the locking and fixation of the nut by the fastening structure, making the nut not prone to loosening, improving the overall fastening property of the bolt, avoiding the loosening of the axle housing due to external vibration, solving the problem that the axle housing is prone to loose installation and even fall off when it is affected by external vibration factors for a long time;

[0015] 2. By setting an anti-rust layer, the anti-rust layer uses epoxy resin coating. Epoxy resin coating has excellent anti-corrosion performance and can be used as an anti-corrosion coating to protect the surfaces of the bolt, bolt column, and nut from corrosion and oxidation, greatly improving the anti-corrosion performance of the structure and extending the service life of the axle housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the front view of the fastening bolt for the split axle housing of the present utility model;

[0017] Figure 2 is the sectional view of the nut of the fastening bolt for the split axle housing of the present utility model;

[0018] Figure 3 is the installation schematic diagram of the fastening bolt for the split axle housing of the present utility model;

[0019] Figure 4 is the schematic diagram of the fastening structure of the fastening bolt for the split axle housing of the present utility model;

[0020] Figure 5 is the exploded view of the fastening bolt for the split axle housing of the present utility model;

[0021] In the figure: 1 - bolt head, 2 - bolt column, 3 - nut, 4 - fastening structure, 41 - fastening ring, 42 - positioning rod, 43 - first magnetic block, 44 - spring, 45 - limiting block, 5 - positioning hole, 6 - second magnetic block, 7 - limiting groove, 8 - hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Refer toFigures 1 to 5 , the fastening bolt of the present utility model for a split axle housing includes a bolt head 1, a bolt column 2, a nut 3, a fastening structure 4, a fastening ring 41, a positioning rod 42, a first magnetic attraction block 43, a spring 44, and a limiting block 45. The bottom of the bolt head 1 is fixedly connected to the bolt column 2. The outer wall of the bolt column 2 is provided with an external thread. The nut 3 is provided with a threaded hole, and the nut 3 is threadedly connected to the bolt column 2 through the threaded hole. A fastening structure 4 is arranged on the side of the nut 3 and outside the bolt column 2. The fastening structure 4 includes a fastening ring 41, a positioning rod 42, a first magnetic attraction block 43, a spring 44, and a limiting block 45. The positioning rods 42 are symmetrically arranged on the fastening ring 41. The ends of the two positioning rods 42 are both installed with a first magnetic attraction block 43. Springs 44 are arranged on the side walls of the positioning rods 42. One end of each spring 44 is connected to a limiting block 45. By providing the fastening structure 4, the overall fastening property of the bolt can be improved, making it difficult for the nut 3 to rotate on its own, thereby extending the service life of this structure.

[0023] Refer to Figure 2 , for the fastening bolt of the present utility model for a split axle housing, positioning holes 5 that cooperate with the positioning rods 42 are symmetrically arranged on the nut 3, and both of the two positioning holes 5 penetrate through the interior of the nut 3.

[0024] Refer to Figure 2 , for the fastening bolt of the present utility model for a split axle housing, second magnetic attraction blocks 6 that are magnetically attracted to the first magnetic attraction blocks 43 are installed on the inner bottom walls of the positioning holes 5. When the positioning rods 42 are completely inserted into the positioning holes 5, since the ends of the positioning rods 42 are installed with first magnetic attraction blocks 43, the first magnetic attraction blocks 43 and the second magnetic attraction blocks 6 in the positioning holes 5 are magnetically attracted to each other, thereby completing the preliminary fixation.

[0025] Refer to Figure 2 , for the fastening bolt of the present utility model for a split axle housing, limiting grooves 7 that are adapted to the limiting blocks 45 are arranged on one side of each of the positioning holes 5, and the two limiting grooves 7 are symmetrically arranged. When the positioning rods 42 are completely inserted into the positioning holes 5, the springs 44 on the positioning rods 42 reset, and the springs 44 drive the limiting blocks 45 to extend, thereby clamping the limiting blocks 45 into the limiting grooves 7 in the positioning holes 5, thereby completing the secondary fixation, and thus completing the locking and fixation of the nut 3 by the fastening structure 4.

[0026] Refer to Figure 1 and Figure 2, the fastening bolt of the present utility model is used for a split axle box body. The side wall of the nut 3 is symmetrically provided with holes 8. Both of the two holes 8 penetrate through the inside of the nut 3 and communicate with the positioning holes 5. The aperture of the holes 8 is smaller than that of the positioning holes 5. When it is necessary to disassemble this structure, a tool is inserted into the holes 8 to make the spring 44 contract, and then the limiting block 45 is ejected from the limiting groove 7. Then the staff takes out the fastening ring 41 and then unscrews the nut 3, thus completing the disassembly of this structure.

[0027] Refer to Figures 1 to 5 , the fastening bolt of the present utility model is used for a split axle box body. The outer surfaces of the bolt head 1, the bolt column 2, and the nut 3 are all coated with an anti-rust layer. The anti-rust layer is an epoxy resin coating. By setting the anti-rust layer, the anti-rust layer adopts an epoxy resin coating, and the epoxy resin coating has excellent anti-corrosion performance. It can be used as an anti-corrosion coating to protect the surfaces of the bolt 1, the bolt column 2, and the nut 3 from corrosion and oxidation, greatly improving the anti-corrosion performance of this structure, thereby extending the service life of the axle box body.

[0028] The working process of the present utility model:

[0029] During the working process of the fastening bolt of the present utility model for a split axle box body, after the bolt column 2 is installed on the equipment, the nut 3 is threadedly installed with the bolt column 2, thereby playing a fastening role on the two objects. Subsequently, the two positioning rods 42 on the fastening ring 41 are aligned with the positioning holes 5 on the nut 3, and then the positioning rods 42 are inserted into the positioning holes 5. During the insertion process of the positioning rods 42, the spring 44 on one side is squeezed and contracted, thereby driving the limiting block 45 to move closer to the inside until the positioning rods 42 are completely inserted into the positioning holes 5. Since the first magnetic attraction block 43 is installed at the end of the positioning rod 42, the first magnetic attraction block 43 and the second magnetic attraction block 6 in the positioning hole 5 are magnetically attracted to each other, thereby completing the preliminary fixation. At the same time, the spring 44 on the positioning rod 42 resets, and the spring 44 drives the limiting block 45 to extend, thereby clamping the limiting block 45 into the limiting groove 7 in the positioning hole 5, thereby completing the secondary fixation, and thus completing the locking and fixation of the fastening structure 4 to the nut 3, making the nut 3 not prone to looseness, and thereby improving the overall fastening performance of this bolt.

[0030] By setting the anti-rust layer, the anti-rust layer adopts an epoxy resin coating, and the epoxy resin coating has excellent anti-corrosion performance. It can be used as an anti-corrosion coating to protect the surfaces of the bolt 1, the bolt column 2, and the nut 3 from corrosion and oxidation, greatly improving the anti-corrosion performance of this structure, thereby extending the service life of the axle box body.

[0031] The above embodiments are descriptions of the present utility model, not limitations on the present utility model. Any scheme obtained by simply transforming the present utility model belongs to the protection scope of the present utility model.

Claims

1. Fastening bolts for split axle box, characterized by: The invention comprises a bolt head (1), a bolt column (2), a nut (3), a fastening structure (4), a fastening ring (41), a positioning rod (42), a first magnetic attraction block (43), a spring (44), and a limit block (45), wherein the bottom of the bolt head (1) is fixedly connected to the bolt column (2), the outer wall of the bolt column (2) is provided with an external thread, the nut (3) is provided with a threaded hole, the nut (3) is threadedly connected to the bolt column (2) through the threaded hole, and the side of the nut (3) and located on the bolt A fastening structure (4) is arranged outside the column (2), and the fastening structure (4) comprises a fastening ring (41), a positioning rod (42), a first magnetic block (43), a spring (44), and a limit block (45). The positioning rods (42) are symmetrically arranged on the fastening ring (41), and the ends of the two positioning rods (42) are both installed with the first magnetic block (43). The side walls of the positioning rods (42) are both provided with springs (44), and one end of the spring (44) is connected to the limit block (45).

2. The fastening bolt for a split axle box according to claim 1, characterized in that: Positioning holes (5) that match the positioning rod (42) are symmetrically arranged on the nut (3), and the two positioning holes (5) both penetrate the interior of the nut (3).

3. The fastening bolt for a split axle box according to claim 2, characterized in that: The inner bottom wall of the positioning hole (5) is provided with a second magnetic attraction block (6) magnetically attracted to the first magnetic attraction block (43).

4. The fastening bolt for a split axle box according to claim 2, characterized in that: A limiting groove (7) adapted to the limiting block (45) is provided on one side of each positioning hole (5), and the two limiting grooves (7) are symmetrically arranged.

5. The fastening bolt for a split axle box according to claim 2, characterized in that: The side wall of the nut (3) is symmetrically provided with holes (8), both holes (8) penetrate the interior of the nut (3) and communicate with the positioning hole (5), and the diameter of the holes (8) is smaller than the diameter of the positioning hole (5).

6. The fastening bolt for a split axle box according to any one of claims 1 to 5, characterized in that: The outer surfaces of the bolt head (1), the bolt column (2) and the nut (3) are all coated with an anti-rust layer, and the anti-rust layer is an epoxy resin coating.

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