CN210634546U

CN210634546U - Grounding structure of composite material vehicle body

Info

Publication number: CN210634546U
Application number: CN201921390969.9U
Authority: CN
Inventors: 周伟旭; 马艳波; 李天亮
Original assignee: CRRC Changchun Railway Vehicles Co Ltd
Current assignee: CRRC Changchun Railway Vehicles Co Ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-05-29
Anticipated expiration: 2029-08-26

Abstract

The utility model provides a ground structure of combined material automobile body, includes ground resistance, bogie axle head earthing device, bogie wheel pair, track, and ground resistance is connected with bogie axle head earthing device, and earthing device passes through bogie wheel pair and track connection, its characterized in that: a plurality of copper bars are respectively arranged outside the roof, in the vehicle and under the vehicle, insulators are arranged between the copper bars and the vehicle body, adjacent copper bars at each part are connected through cables to form a copper bar-cable passage, and the copper bar-cable passages at each part are connected through cables to form a conductive passage from the roof, in the vehicle to under the vehicle; the composite material car body grounding structure solves the problem that a composite material car body is not conductive, and overcomes the defect that a grounding seat of a traditional metal car body is not easy to change positions and quantity after welding.

Description

Grounding structure of composite material vehicle body

Technical Field

The utility model belongs to the technical field of rail vehicle electrical system ground protection, especially, relate to a ground protection structure of non-metallic composite automobile body.

Background

The rail vehicle electrical system is supplied with power by high voltage, and an effective and reliable grounding design is required to ensure the safety of personnel and vehicles. At present, the body structure of the railway vehicle is usually made of metal materials, and the ground protection is realized by the following scheme: the bogie grounding device comprises a bogie shaft, a bogie wheel pair, a bogie base, a bogie electric device, a grounding seat, a bogie wheel pair and a bogie. The grounding current is transmitted to a grounding device at the axle end of the bogie through the grounding seat, the vehicle body shell and the grounding resistor, and then is contacted with the track through the bogie wheel pair to form a complete grounding path, so that the grounding protection of an electrical system is realized.

With the development of rail transit equipment technology, a light and high-strength composite material vehicle body is produced, but the grounding problem of a vehicle electrical system is brought along with the development of the rail transit equipment technology. Composite material is different from metal material, is the bad conductor of electricity, can not pass through self transmission current, also can not weld the ground connection seat on it, therefore can't adopt the ground connection scheme of traditional metal automobile body, must seek a novel ground connection scheme that is fit for composite material automobile body, safe and reliable, the safety of guarantee personnel and vehicle.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the electrical system ground connection problem of vehicle with combined material automobile body assembly for provide the ground structure of a novel combined material automobile body, guarantee ground connection system safe and reliable and easily realize.

In order to solve the technical problem, the utility model provides a ground structure of combined material automobile body, including ground resistance, bogie axle head earthing device, bogie wheel pair, track, ground resistance is connected with bogie axle head earthing device, and earthing device passes through bogie wheel pair and rail connection, its characterized in that: a plurality of copper bars are respectively arranged outside the roof, in the vehicle and under the vehicle, insulators are arranged between the copper bars and the vehicle body, adjacent copper bars at each part are connected through cables to form a copper bar-cable passage, and the copper bar-cable passages at each part are connected through cables to form a conductive passage from the roof, in the vehicle to under the vehicle; the ground wire of the electrical equipment is connected with the copper bar, the copper bar under the vehicle is connected with the vehicle ground resistance, the ground current is transmitted to the grounding device at the shaft end of the bogie through the copper bar-cable passage and the ground resistance, and then is contacted with the track through the bogie wheel pair, and the ground protection of the electrical system is realized through the continuous conductive passage.

The copper bar, the insulator and the vehicle body are fastened and connected through the fastening piece, so that the copper bar is easy to disassemble, replacement and disassembly can be easily realized in any process, and the problem of welding deformation cannot occur.

The copper bar is provided with a grounding wire connecting hole, can be flexibly arranged as required, and is easy to adapt to the requirement of equipment grounding.

The utility model discloses composite material car body ground structure has solved composite material car body self non-conducting, can't realize the difficult problem of electrical system ground protection with current metal car body ground scheme; the grounding copper bar is fixedly connected with the vehicle body, so that the welding deformation of the vehicle body caused by welding a large number of grounding seats on the traditional metal vehicle body is avoided; the scheme adopts fastening connection, can easily realize replacement and disassembly in any process, and solves the problem that a welding structure is difficult to disassemble and change; the grounding wire connecting holes in the copper bars can be increased as required, the grounding requirements of equipment can be flexibly met, and the defects that positions and quantity of grounding seats of traditional metal car bodies are not easy to change after welding are overcome.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the installation of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a sectional view taken along line B-B in fig. 2.

Detailed Description

Referring to fig. 1-4, the ground structure of the present invention mainly comprises a copper bar 1, an insulator 2, a connecting cable 3, a ground connection hole 4, a fastener 5, a fastener 6, a car body 7, a fastener 8, a ground resistance, a bogie axle end grounding device, a bogie wheel set, and a rail. Two ends of the insulator 2 are respectively connected with the vehicle body 7 and the copper bar 1, so that the copper bar and the vehicle body are insulated; the copper bars arranged outside the roof, inside the vehicle and under the vehicle are connected with each other by cables 3 to form copper bar-cable passages of each part, and the copper bar-cable passages of each part are connected by cables to form conductive passages from the roof, the inside of the vehicle to the under the vehicle. The fastener 8 is a fastener for connecting the insulator with the vehicle body, the fastener 5 is a fastener for connecting the copper bar with the insulator, and the fastener 6 is a fastener for connecting the cable with the copper bar. Be equipped with earth connection hole 4 on the copper bar 1, can set up as required in a flexible way, easily adapt to equipment ground connection demand.

When the insulator is installed, the fastening pieces 8 with the same number as the number of the insulators 2 are respectively arranged and installed outside the roof, in the car and under the car of the composite material car body. The insulator 2 is screwed into the fastener 8 and fastened, the copper bars 1 are fastened on the insulator 2 outside the roof, in the vehicle and under the vehicle by the fastener 5, and finally the adjacent copper bars at the same position and the copper bars at different positions are connected by the connecting cable 3 by the fastener 6 to form a conductive path penetrating through the roof and the inside of the vehicle to under the vehicle. The installation connection relation is easy to disassemble, replacement and disassembly can be easily realized in any working procedure, and the problem of welding deformation cannot occur.

Connecting the grounding wire of the electrical system to the proper position of the copper bar at each part, connecting the copper bar under the vehicle with the vehicle grounding resistor, connecting the grounding resistor with the bogie shaft end grounding device, and connecting the grounding device with the track through the bogie wheel pair. The grounding current is transmitted to a grounding device at the shaft end of the bogie through a copper bar-cable passage and a grounding resistor, and then is contacted with a track through a bogie wheel pair, and the grounding protection of an electric system is realized through a continuous conductive passage.

Claims

1. The utility model provides a ground structure of combined material automobile body, includes ground resistance, bogie axle head earthing device, bogie wheel pair, track, and ground resistance is connected with bogie axle head earthing device, and earthing device passes through bogie wheel pair and track connection, its characterized in that: a plurality of copper bars are respectively arranged outside the roof, in the vehicle and under the vehicle, insulators are arranged between the copper bars and the vehicle body, adjacent copper bars at each part are connected through cables to form a copper bar-cable passage, and the copper bar-cable passages at each part are connected through cables to form a conductive passage from the roof, in the vehicle to under the vehicle; the ground wire of the electrical equipment is connected with the copper bar, the copper bar under the vehicle is connected with the vehicle ground resistance, the ground current is transmitted to the grounding device at the shaft end of the bogie through the copper bar-cable passage and the ground resistance, and then is contacted with the track through the bogie wheel pair, and the ground protection of the electrical system is realized through the continuous conductive passage.

2. The composite material vehicle body ground structure according to claim 1, wherein: the copper bar is fastened and connected with the insulator and the vehicle body through fasteners.

3. The composite material vehicle body ground structure according to claim 1, wherein: and the copper bar is provided with a grounding wire connecting hole for connecting a grounding wire of the electrical equipment.