Novel anti-loosening fastening device for railway overhead line system

Abstract

The invention discloses a novel anti-loosening fastening device for a railway catenary. The novel anti-loosening fastening device comprises a main bolt, a main nut, a gasket and a locking nut, wherein the main nut, the gasket and the locking nut are arranged on the main bolt; the main nut and the locking nut are different in screw diameter, screw pitch and rotation direction; the screw diameter of the main nut is larger than that of the locking nut, and the screw pitch is smaller than that of the locking nut; two triangular ring grooves are formed in the contact surface of the main nut and the gasket; ratchets are uniformly arranged on the contact surface of the locking nut and the gasket; and a plurality of taper pins are wedged in a spiral seam between the locking nut and the main bolt. The main nut and the locking nut which are different in screw diameter and screw pitch and opposite in screwing direction are adopted to jointly clamp and prevent the contact net part from loosening; and by arranging a triangular ring groove, ratchets and taper pins, the stability of the whole structure can be improved, and looseness is not prone to occurring.

Description

Technical Field

[0001] The invention relates to the technical field of sampling devices, in particular to a novel anti-loosening and fastening device for railway contact networks. Background Art

[0002] Railway contact network fasteners have long faced severe challenges: High-frequency vibration loosening: Continuous vibration generated by train operation causes traditional nuts to easily loosen due to self-rotation; Temperature difference deformation failure: Thermal expansion and contraction of metals causes the thread fit clearance to change, reducing the preload force; And the existing bolts and nuts have the following defects: Ordinary double nuts (same rotation direction / same specifications) are prone to simultaneous loosening; when chemical adhesives are used for reinforcement, they are difficult to disassemble and are not resistant to high temperatures. Summary of the Invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a new anti-loosening fastening device for railway contact network to solve the problems mentioned in the background technology.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: the present invention provides a new anti-loosening fastening device for railway contact network, including a main bolt and a main nut, a gasket and a locking nut arranged on the main bolt; the main nut and the locking nut have different thread diameters, pitches and rotation directions; the thread diameter of the main nut is larger than that of the locking nut, and the pitch is smaller than that of the locking nut.

[0005] Preferably, the contact surface between the main nut and the gasket is provided with two triangular annular grooves.

[0006] Preferably, the triangular ring groove has a groove depth of 0.6 mm and a groove angle of 90 degrees.

[0007] Preferably, the gasket is an aluminum sheet, and its outer diameter is the same as the inscribed circle of the outer hexagon of the main nut, and its inner diameter is the same as the outer diameter of the main bolt.

[0008] Preferably, ratchet teeth are evenly arranged on the contact surface between the locking nut and the gasket.

[0009] Preferably, the number of the ratchet teeth is 24, they are right-handed, and the tooth tip height is 2 mm.

[0010] Preferably, a plurality of tapered pins are wedged in the rotational gap between the locking nut and the main bolt.

[0011] Preferably, the tapered pin is provided with an internal screw hole on the end away from the tapered tip for easy disassembly.

[0012] The beneficial effects of the present invention are as follows: the present invention adopts a main nut and a locking nut with different thread diameters and pitches and opposite rotation directions to jointly clamp and prevent loosening of the contact network parts; there is an aluminum washer with good plasticity between the main nut and the locking nut, and the contact surface between the main nut and the gasket is provided with two triangular ring grooves, and the contact surface between the locking nut and the gasket is evenly provided with ratchets, and a tapered pin is driven into the rotation seam of the locking nut at the tail end, thereby improving the stability of the overall structure and preventing it from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of the overall structure provided by the present invention.

[0015] Figure 2 This is a schematic diagram of the triangular ring groove structure provided by the present invention.

[0016] Figure 3 This is a schematic diagram of the ratchet structure provided by the present invention.

[0017] Figure 4 This is a schematic diagram of the main bolt structure provided by the present invention.

[0018] Description of the accompanying drawings: main bolt 1, main nut 2, gasket 3, locking nut 4, tapered pin 5, triangular ring groove 6, ratchet 7. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example: like Figure 1-Figure 4 As shown, The present invention provides a novel anti-loosening fastening device for railway contact network, comprising a main bolt 1, a main nut 2, a washer 3 and a locking nut 4. In this embodiment, the lower half of the screw rod of the main bolt 1 is the L1 section, the lower half of the L1 section is the L2 section, the main nut 2 is threadedly connected to the upper half of the L1 section of the main bolt 1, the locking nut 4 is threadedly connected to the lower half of the L1 section of the main bolt 1, and the gasket 3 is located between the main nut 2 and the locking nut 4.

[0021] In this embodiment, the thread diameter, pitch and rotation direction of the main nut 2 and the locking nut 4 are different. The thread diameter of the main nut 2 is larger than that of the locking nut 4, the pitch is smaller than that of the locking nut 4, and it is left-handed; the locking nut 4 is right-handed.

[0022] In this embodiment, the contact surface between the main nut 2 and the washer 3 is provided with two triangular annular grooves 6 with a groove depth of 0.6 mm and a groove angle of 90 degrees.

[0023] In this embodiment, the gasket 3 is an aluminum sheet, whose outer diameter is the same as the inscribed circle of the outer hexagon of the main nut 2, and the inner diameter is the same as the outer diameter of the main bolt 1, and the thickness of the gasket 3 is 2 mm.

[0024] In this embodiment, ratchet teeth 7 are evenly arranged on the contact surface between the locking nut 4 and the washer 3. The number of ratchet teeth 7 is 24, which are right-handed and have a tooth tip height of 2 mm.

[0025] In this embodiment, the outer hexagons of the main nut 2 and the locking nut 4 are completely consistent, which has two functions: one is that the same wrench can be used, and the other is to maximize the contact area with the gasket 3, which is beneficial for preventing loosening.

[0026] In this embodiment, after the lock nut 4 is tightened onto the main bolt 1, several tapered pins 5 are wedged into the gap between the lock nut 4 and the main bolt 1. The taper of the tapered pins 5 is 1:50. When in use, a pistol drill is used to first drill a tapered hole with a tapered drill bit, and then the tapered pins 5 are driven in to form a tight fit.

[0027] In this embodiment, an inner screw hole is provided on the end of the taper pin 5 away from the taper tip, so as to facilitate removal of the taper pin 5 during disassembly.

[0028] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A new anti-loosening fastening device for railway contact network, characterized in that: The invention comprises a main bolt (1), a main nut (2), a washer (3) and a locking nut (4) arranged on the main bolt (1); the main nut (2) and the locking nut (4) have different thread diameters, thread pitches and rotation directions; the thread diameter of the main nut (2) is larger than that of the locking nut (4), and the thread pitch is smaller than that of the locking nut (4).

2. A novel anti-loosening fastening device for railway contact network according to claim 1, characterized in that: The contact surface between the main nut (2) and the washer (3) is provided with two triangular annular grooves (6).

3. A novel anti-loosening fastening device for railway contact network according to claim 2, characterized in that: The triangular ring groove (6) has a groove depth of 0.6 mm and a groove angle of 90 degrees.

4. A novel anti-loosening fastening device for railway contact network according to claim 1, characterized in that: The gasket (3) is an aluminum sheet, and the outer diameter of the gasket (3) is the same as the inscribed circle of the outer hexagon of the main nut (2), and the inner diameter is the same as the outer diameter of the main bolt (1).

5. A novel anti-loosening fastening device for railway contact network according to claim 1, characterized in that: Ratchet teeth (7) are evenly arranged on the contact surfaces of the locking nut (4) and the washer (3).

6. A novel anti-loosening fastening device for railway contact network according to claim 1, characterized in that: The ratchet teeth (7) are 24 in number, are right-handed, and have a tooth tip height of 2 mm.

7. A novel anti-loosening fastening device for railway contact network according to claim 1, characterized in that: A plurality of tapered pins (5) are wedged in the rotational gap between the locking nut (4) and the main bolt (1).

8. A novel anti-loosening fastening device for railway contact network according to claim 1, characterized in that: The cone pin (5) is provided with an inner screw hole on the end away from the cone tip for easy disassembly.

Images