Grounding backflow device with integrated box cover

Abstract

The utility model discloses a grounding backflow device with an integrated box cover, which relates to the technical field of grounding backflow devices for rail transit and comprises a friction disc connected with a wheel axle, a brush carrier assembly connected with a train axle box and the integrated box cover arranged on the brush carrier assembly. The brush holder assembly comprises a brush holder, an insulating disc sleeving the brush holder, a carbon brush arranged in the brush holder and a cable fastener arranged on the brush holder, the integrated box cover comprises a box cover, a tubular column connected with the box cover and a coil spring arranged on the tubular column, and the coil spring is in contact with the upper portion of the carbon brush and provides pressure for the carbon brush so as to ensure that the carbon brush keeps in contact with the friction disc; the box cover body is integrally cast and formed, the welding step is omitted, the box cover is attractive and reliable, the coil spring is integrated on the box cover, various parts are reduced, cost is saved, space is saved, triple sealing is adopted, the sealing performance is good, and the box cover has the advantages of being simple in structure, small in size, light in weight, convenient and fast to install, low in use failure rate and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of grounding return devices for rail transportation, in particular to a grounding return device with an integrated box cover. Background Art

[0002] The ground return device plays a vital role in high-speed rail, subway or light rail. It is a device used to form high-voltage return. The ground return is the return of the negative end of the high-voltage power supply, which is connected to the train track through the ground return device. The negative end of the high-voltage power supply is first connected to the insulator insulated from the car body through a wire, then connected to the bogie frame through a grounding wire, and then connected to the shaft end ground return device through a grounding wire.

[0003] Axle end grounding devices are more common on high-speed trains, subways, or light rail trains. The grounding device provides current conduction and achieves insulation with the axle box, protecting the axle box axle. The axle box cover realizes the installation of the grounding device and the axle box. The friction disk and the carbon brush located on the grounding device body cooperate to provide it with a reliable conduction circuit.

[0004] However, the box cover of the existing grounding device is mostly installed with multiple bolts, which requires a large installation space and cannot be arranged when the installation interface size is small. The large box cover will also affect the sealing effect.

[0005] Therefore, it is necessary to design a ground return device with an integrated box cover to improve the above problems. Utility Model Content

[0006] In view of the above problems in the prior art, the utility model provides a ground return device with an integrated box cover, which integrates a coil spring and a box cover together, has a simple structure and a small size.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A ground return device with an integrated box cover, comprising a friction disk connected to a wheel axle, a brush holder assembly connected to a train axle box, and an integrated box cover arranged on the brush holder assembly, wherein the brush holder assembly comprises a brush holder, an insulating disk sleeved on the brush holder, a carbon brush arranged in the brush holder, a brush braid connected to the carbon brush, and a cable fastener arranged on the brush holder, and the integrated box cover comprises a box cover, a pipe column connected to the box cover and used for fixing the box cover, and a coil spring arranged on the pipe column, wherein the coil spring contacts the upper part of the carbon brush and provides pressure to the carbon brush to ensure that the carbon brush maintains contact with the friction disk.

[0009] As a preferred embodiment of the present invention, the brush holder assembly further comprises a sealing gasket, the sealing gasket is sleeved on the brush holder, and the insulating disk is pressed on the sealing gasket.

[0010] As a preferred embodiment of the present invention, the brush holder assembly further comprises a clamping plate and clamping plate bolts, and the insulating disc is fixed to the brush holder by means of the clamping plate and the clamping plate bolts.

[0011] As a preferred embodiment of the utility model, an insulating disk sealing ring is mounted on the insulating disk.

[0012] As a preferred embodiment of the present invention, the brush holder assembly further comprises a brush holder sealing ring, and the brush holder sealing ring is installed in a sealing ring groove of the brush holder.

[0013] As a preferred embodiment of the present invention, the brush holder assembly further comprises a carbon brush fastener, and the terminals on the brush braids are fixed to the brush holder by the carbon brush fastener after being alternately overlapped.

[0014] As a preferred embodiment of the present invention, the integrated box cover is fixed to the brush holder by means of studs and nuts.

[0015] As a preferred embodiment of the present invention, the tube column is a triangular tube.

[0016] As a preferred embodiment of the present invention, the pipe column and the box cover are integrally cast.

[0017] As a preferred embodiment of the present invention, the coil spring is riveted to the column by rivets.

[0018] Due to the adoption of the above technical solution, compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model is a ground return device with an integrated box cover. The box cover body is integrally cast, eliminating the welding step, and is beautiful and reliable. In addition, the coil spring is integrated on the box cover, reducing multiple parts, saving costs and saving space;

[0020] 2. The utility model is a grounding return device with an integrated box cover. The box cover and the brush holder are installed with only one stud, which reduces the installation space and greatly releases the accommodation space inside the cavity, so that the inner cavity space can be fully utilized, thereby reducing the volume of the grounding return device, and effectively solving the problem that the grounding device cannot be installed due to limited space and the grounding device is too large;

[0021] 3. The ground return device with an integrated box cover of the utility model adopts triple sealing, that is, the box cover uses a cover sealing ring, the insulating disk and the brush holder use a sealing gasket, and the insulating disk and the train axle end protection cover insulating disk sealing ring are sealed, and the sealing performance is good;

[0022] 4. The ground return device with an integrated box cover of the utility model has the characteristics of simple structure, small size, light weight, convenient and quick installation, and low failure rate in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other purposes and results of the present invention will become more clear and easy to understand. In the accompanying drawings:

[0024] Figure 1 It is a three-dimensional diagram of the utility model;

[0025] Figure 2 It is a top view of the utility model;

[0026] Figure 3 yes Figure 2 Sectional view along AA direction;

[0027] Figure 4 It is a top view of the integrated box cover of the utility model;

[0028] Figure 5 yes Figure 4 Cross-sectional view along the BB direction;

[0029] Figure 6 It is a three-dimensional diagram of the brush holder assembly of the utility model;

[0030] Figure 7 It is a top view of the brush holder assembly of the utility model;

[0031] Figure 8 yes Figure 7 Sectional view along CC direction;

[0032] The figure marks include: integrated box cover 1, brush holder assembly 2, friction disc 3, friction disc fastener 4, stud 5, cover flat washer 6, nut 7, box cover 1.1, coil spring 1.2, protective sheet 1.3, rivet 1.4, cover sealing ring 1.5, pipe column 1.6, brush holder 2.1, insulating disc 2.2, carbon brush 2.3, brush braid 2.31, splint 2.4, sealing gasket 2.5, insulating disc sealing ring 2.6, brush holder sealing ring 2.7, carbon brush fastener 2.8, cable fastener 2.9, splint bolt 2.10. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. It should be pointed out that all the drawings are exemplary representations. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0037] Reference Figures 1 to 8 A grounding return device with an integrated box cover includes an integrated box cover 1, a brush holder assembly 2, a friction disc 3, a friction disc fastener 4, a stud 5, a cover flat washer 6, and a nut 7. The integrated box cover 1 is set on the brush holder assembly 2 through the stud 5, and the upper part of the integrated box cover 1 is fastened by the cover flat washer 6 and the nut 7. The brush holder assembly 2 is connected to the train axle box, the friction disc 3 is connected to the wheel axle and rotates with the wheel axle, and the friction disc 3 is in contact with the brush holder assembly 2, so that the train power supply line is always connected to the ground.

[0038] The integrated box cover 1 comprises a box cover 1.1, a coil spring 1.2, a protective sheet 1.3, a rivet 1.4, a cover sealing ring 1.5, and a pipe column 1.6. The box cover 1.1 is cast, and the pipe column 1.6 is arranged at the lower part of the box cover 1.1. The pipe column 1.6 and the box cover 1.1 are preferably cast as one piece. The stud 5 passes through the inside of the pipe column 1.6 to fix the box cover 1.1. Specifically, one end of the stud 5 is screwed into the threaded hole at the bottom of the brush holder 2.1, and the other end is fixed by a cover flat washer 6 and a nut 7. The coil spring 1.2 is arranged on the tube column 1.6, and the rivet 1.4 passes through the protective sheet 1.3 and the coil spring 1.2 in sequence, and rivets the coil spring 1.2 to the tube column 1.6. The coil spring 1.2 contacts the upper part of the carbon brush 2.3 and provides pressure for the carbon brush 2.3 to ensure that the carbon brush 2.3 maintains contact with the friction disk 3. The tube column 1.6 is preferably a triangular tube, and the three surfaces of the triangular tube are riveted with coil springs 1.2. The cover sealing ring 1.5 is installed in the middle hole groove of the box cover 1.1.

[0039] The brush holder assembly 2 comprises a brush holder 2.1, an insulating disk 2.2, a carbon brush 2.3, a brush braid 2.31, a clamp plate 2.4, a sealing gasket 2.5, an insulating disk sealing ring 2.6, a brush holder sealing ring 2.7, a carbon brush fastener 2.8, a cable fastener 2.9, and a clamp plate bolt 2.10. The sealing gasket 2.5 is sleeved on the brush holder 2.1, the insulating disk 2.2 is sleeved on the brush holder 2.1 and pressed on the sealing gasket 2.5, and the insulating disk 2.2 is fixed to the brush holder 2.1 by the clamp plate 2.4 and the clamp plate bolt 2.10. The disk sealing ring 2.6 is mounted on the insulating disk 2.2. The three carbon brushes 2.3 are respectively installed in the three carbon brush cavities of the brush holder 2.1. Each carbon brush 2.3 is provided with two brush braids 2.31. The brush braids 2.31 are provided with mounting terminals. The brush braids 2.31 are opened in an octave. The terminals on the brush braids 2.31 of the three carbon brushes 2.3 are alternately overlapped and fixed to the brush holder 2.1 with carbon brush fasteners 2.8. The brush holder sealing ring 2.7 is installed in the sealing ring groove of the brush holder 2.1. The cable fastener 2.9 is screwed into the brush holder 2.1.

[0040] The following will refer to Figures 1 to 8 The working principle of the utility model is described.

[0041] The three coil springs 1.2 of the integrated box cover 1 are respectively pressed against the three carbon brushes 2.3 of the brush holder assembly 2, and the box cover 1.1 is pressed until it fits with the brush holder 2.1, and then the integrated box cover 1 and the brush holder assembly 2 are fixed with the studs 5, the cover flat washers 6, and the cover nuts 7, and then the integrated box cover 1 and the brush holder assembly 2 are installed on the train axle box through fasteners, and connected to the vehicle main line through the cable fasteners 2.9 on the brush holder 2.1; the friction disc 3 is installed on the wheel axle through the friction disc fasteners 4 and rotates synchronously with the wheel, and the coil spring 1.2 in the box cover 1.1 provides pressure for the carbon brush 2.3, which can ensure that the pressure between the carbon brush 2.3 and the friction disc 3 is maintained within the required range, so that the device can make the carbon brush 2.3 continuously and stably contact with the friction disc 3 during the operation of the vehicle, forming a predetermined conduction circuit of the vehicle power supply system.

[0042] The insulating disk 2.2 of the grounding device can effectively ensure that the live parts of the device are isolated from the vehicle, thereby protecting the vehicle and the people on the vehicle, and the carbon brush 2.3 and the friction disk 3 are both wear-resistant conductive materials, which can achieve a very high wear-resistant mileage. The utility model integrates the coil spring 1.2 and the box cover 1.1 together, and the box cover 1.1 is installed and sealed with a single hole, and the multiple mounting holes around the original box cover are concentrated into a middle mounting hole, so that the grounding device has the largest utilization space within the smallest volume, and the box cover 1.1 has the dual functions of cover protection and providing pressure for the carbon brush 2.3. On the premise of achieving the optimal function, the space occupied by the mounting bolts of the box cover 1.1 is released to the maximum extent. The utility model can be used in high-speed railways, subways or light rail trains, installed at the axle end of the train, and used to form high-voltage return.

[0043] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A ground return device with an integrated cover, characterized in that: It includes a friction disk connected to the wheel axle, a brush holder assembly connected to the train axle box, and an integrated box cover arranged on the brush holder assembly. The brush holder assembly includes a brush holder, an insulating disk sleeved on the brush holder, a carbon brush arranged in the brush holder, a brush braid connected to the carbon brush, and a cable fastener arranged on the brush holder. The integrated box cover includes a box cover, a pipe column connected to the box cover and used to fix the box cover, and a coil spring arranged on the pipe column. The coil spring contacts the upper part of the carbon brush and provides pressure to the carbon brush to ensure that the carbon brush maintains contact with the friction disk.

2. A ground return device with an integrated cover according to claim 1, characterized in that: The brush holder assembly further comprises a sealing gasket, which is sleeved on the brush holder and on which the insulating disk is pressed.

3. A ground return device with an integrated cover according to claim 1, characterized in that: The brush holder assembly also includes a clamping plate and clamping plate bolts, through which the insulating disc is fixed to the brush holder.

4. A ground return device with an integrated cover according to claim 1, characterized in that: An insulating disk sealing ring is sleeved on the insulating disk.

5. A ground return device with an integrated cover according to claim 1, characterized in that: The brush holder assembly also includes a brush holder sealing ring, which is installed in a sealing ring groove of the brush holder.

6. A ground return device with an integrated cover according to claim 1, characterized in that: The brush holder assembly also includes a carbon brush fastener, and the terminals on the brush braids are alternately stacked and fixed to the brush holder by the carbon brush fastener.

7. A ground return device with an integrated cover according to claim 1, characterized in that: The integrated box cover is fixed to the brush holder via studs and nuts.

8. A ground return device with an integrated cover according to claim 1, characterized in that: The pipe column is a triangular pipe.

9. A ground return device with an integrated cover according to claim 8, characterized in that: The pipe column and the box cover are integrally cast.

10. A ground return device with an integrated cover according to claim 1, characterized in that: The coil spring is riveted to the column by rivets.

Images