CN216783309U

CN216783309U - Railway contact net pin and sleeve composite structure

Info

Publication number: CN216783309U
Application number: CN202220535605.0U
Authority: CN
Inventors: 储文平; 马仕祥; 余军; 朱小庆; 魏云; 戴亿; 邵耀斌; 陈天宇
Original assignee: China Railway Construction Electrification Bureau Group Rail Transit Equipment Co Ltd
Current assignee: China Railway Construction Electrification Bureau Group Rail Transit Equipment Co Ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-06-21
Anticipated expiration: 2032-03-10

Abstract

The utility model relates to the technical field of railway contact networks, in particular to a railway contact network pin and sleeve composite structure, which comprises a pin and a sleeve, wherein the pin is made of copper alloy, the sleeve is made of aluminum alloy, an annular groove is formed in the peripheral wall of the pin, a bulge is arranged on the peripheral wall of the sleeve along the circumferential direction of the sleeve, the pin is inserted into the sleeve, and the bulge is pressed into the annular groove; according to the utility model, the bulges on the sleeve are pressed into the annular grooves of the pins through high-temperature pressurization, so that the sleeve and the pins are connected, the number of fasteners is reduced, and the connection strength is improved.

Description

Railway contact net pin and sleeve composite structure

Technical Field

The utility model relates to the technical field of railway contact networks, in particular to a railway contact network pin and sleeve composite structure.

Background

A railway catenary is an important facility for supplying electric power to an electric locomotive, and in the railway catenary, in order to make a pantograph above the electric locomotive contact a power supply line well during operation, the power supply line needs to be positioned according to the operation requirement of the pantograph, and a device for positioning the power supply line is called a positioning device. The positioning device generally comprises a positioning ring, a positioner and a positioning wire clamp, the positioner fixes the position of a contact line through the positioning wire clamp, the currently used positioner comprises a sleeve and a pin which are connected in an elastic cylindrical pin mode, and the strength and the stability of the connection of the pin and the sleeve are greatly reduced due to the vibration caused by the passing of a train, so that the potential safety hazard is caused during the operation of the railway.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: in order to overcome the problem that the connection strength is not high due to the fact that the existing pin and the existing sleeve are connected through the elastic cylindrical pin, a railway contact net pin and sleeve composite structure is provided.

In order to solve the technical problems, the utility model adopts the following technical scheme: a railway contact net pin and sleeve composite structure comprises a pin and a sleeve, the pin is made of copper alloy, the sleeve is made of aluminum alloy, an annular groove is formed in the peripheral wall of the pin, a protrusion is arranged on the peripheral wall of the sleeve along the circumferential direction of the sleeve and is inserted into the sleeve, the protrusion is pressed into the annular groove, the size of the protrusion and the size of the groove are basically equal, the axial diameter of the pin is slightly larger than the aperture of the sleeve, the pin is inserted into the sleeve in a normal temperature state, the pin and the sleeve are in interference fit, the groove is located below the protrusion, then a combined part of the pin and the sleeve is placed into a mold, the temperature and the pressure are raised after the mold is closed, due to the principle of thermal expansion and cold contraction, the aperture of the sleeve is enlarged when the sleeve is in a high temperature state, the pin and the sleeve are in a gapless fit state at the moment, the protrusion on the sleeve is stressed and sinks to be level with the peripheral wall, and the corresponding inner peripheral wall protrudes inwards into the annular groove of the pin, after the temperature reduces, the shrinkage phenomenon takes place for the sleeve hole, has promoted pin and telescopic bonding strength.

Furthermore, the protrusions comprise two ellipsoidal protrusions which are symmetrically distributed along the axis of the sleeve and are connected end to end, and the ellipsoidal protrusions can be uniformly pressed into the annular groove after being stressed, so that the surface of the sleeve is smooth and has no protrusion trace.

Furthermore, the pin head portion is provided with an exhaust structure, an exhaust channel is formed between the exhaust structure and the inner peripheral wall of the sleeve, when the pin is inserted into the sleeve, air in the sleeve is exhausted through the exhaust channel, and the problem that the bulge cannot be sufficiently attached to the annular groove due to the existence of the air when the bulge is pressed into the annular groove is avoided.

Further, exhaust structure includes two exhaust planes, exhaust plane extends to the annular groove, and two exhaust planes are formed with the exhaust passage of symmetry along pin axis symmetric distribution between symmetrical structure's the exhaust plane and the internal perisporium of sleeve, and the exhaust passage exhaust effect that the air set up through the symmetry is better.

The utility model has the beneficial effects that: according to the utility model, the bulges on the sleeve are pressed into the annular grooves of the pins through high-temperature pressurization, so that the sleeve and the pins are connected, the number of fasteners is reduced, and the connection strength is improved.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a front view of a pin;

FIG. 2 is a front view of the sleeve;

FIG. 3 is a cross-sectional view of the sleeve;

FIG. 4 is a schematic view of the pin and sleeve prior to assembly;

FIG. 5 is a schematic view of the pin and sleeve after they are assembled;

in the figure: 1. a pin; 101. an annular groove; 102. an exhaust structure; 2. a sleeve; 201. and (4) protruding.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams each illustrating the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1-5, the utility model is a railway contact net pin and sleeve composite structure, comprising a pin 1 and a sleeve 2, wherein the pin 1 is made of copper alloy, the sleeve 2 is made of aluminum alloy, an annular groove 101 is formed in the peripheral wall of the pin 1, a bulge 201 is arranged on the peripheral wall of the sleeve 2 along the circumferential direction, the volume of the bulge 201 is basically equal to that of the annular groove 101, the pin 1 is inserted into the sleeve 2, and the bulge 201 is pressed into the annular groove 101; the protrusions 201 are two ellipsoidal protrusions which are symmetrically distributed along the axis of the sleeve 2 and are connected end to end, the ellipsoidal protrusions can be uniformly pressed into the annular groove 101 after being stressed, so that the surface of the sleeve 2 is smooth and has no protrusion trace, the shaft diameter of the pin 1 is slightly larger than the bore diameter of the sleeve 2, the pin 1 is inserted into the sleeve 2 at normal temperature, the annular groove 101 is positioned below the bulge 201, then the assembly of the pin 1 and the sleeve 2 is placed into a mold, the mold is closed, the temperature and the pressure are increased, due to the principle of thermal expansion and cold contraction, when the sleeve 2 is in a high-temperature state, the aperture is enlarged, the pin 1 and the sleeve 2 are in a gapless fit state at the moment, the bulge 201 on the sleeve 2 is stressed to sink to be flush with the outer peripheral wall, the corresponding inner peripheral wall inwards bulges into the annular groove 101 of the pin 1, after the temperature reduces, the shrinkage phenomenon takes place for 2 hole of sleeve, has promoted the joint strength of pin 1 and sleeve 2.

The head of the pin 1 is provided with an exhaust structure 102, an exhaust channel is formed between the exhaust structure 102 and the inner peripheral wall of the sleeve 2, the exhaust structure 102 comprises two exhaust planes, the exhaust planes extend to the annular groove 101 and are symmetrically distributed along the axis of the pin 1, when the pin 1 is inserted into the sleeve 2, air in the sleeve 2 is exhausted through the exhaust channel, and the problem that the protrusion 201 cannot be fully attached to the annular groove 101 due to the existence of the air when the protrusion 201 is pressed into the annular groove 101 is avoided.

The working principle is as follows: insert pin 1 in the sleeve 2 under the normal atmospheric temperature state, in the insertion process, the air in the sleeve 2 is discharged through exhaust passage, then put into the mould with the sub-assembly of pin 1 and sleeve 2, the intensification is pressurized after the compound die, protruding 201 atress on the sleeve 2 pushes down to with the periphery wall parallel and level, corresponding interior perisporium is inside protruding to in the annular groove 101 of pin 1, and because expend with heat and contract with cold principle, when sleeve 2 is high temperature state, the aperture grow, pin 1 and sleeve 2 are clearance fit, after the temperature reduction, shrink phenomenon takes place for the sleeve 2 hole, pin 1 and sleeve 2 are interference fit, the bonding strength of pin 1 and sleeve 2 has been improved.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a railway contact net pin and sleeve composite construction which characterized in that: including pin (1) and sleeve (2), pin (1) material is the copper alloy, sleeve (2) material is the aluminum alloy, pin (1) periphery wall is opened and is had annular groove (101), sleeve (2) periphery wall is equipped with protruding (201) along its circumference, pin (1) inserts in sleeve (2), protruding (201) are impressed in annular groove (101).

2. The railway contact net pin and sleeve composite structure as claimed in claim 1, wherein: the bulges (201) comprise two ellipsoidal bulges which are symmetrically distributed along the axis of the sleeve (2) and are connected end to end.

3. The railway contact net pin and sleeve composite structure of claim 1, wherein: the head of the pin (1) is provided with an exhaust structure (102), and an exhaust channel is formed between the exhaust structure (102) and the inner peripheral wall of the sleeve (2).

4. The railway contact net pin and sleeve composite structure of claim 3, wherein: the exhaust structure (102) comprises two exhaust planes, the exhaust planes extend to the annular groove (101), and the two exhaust planes are symmetrically distributed along the axis of the pin (1).