Grounding busbar

Abstract

The utility model relates to the technical field of rail transit, and discloses a grounding busbar, which comprises an insulating bottom plate, a grounding plate and a mounting plate used for being fixed with a train, and is characterized in that the grounding plate is fastened and connected to the front surface of the insulating bottom plate through three M10 bolts used for negative wire wiring of train equipment; an insulating sealant for pre-fixing is coated between the insulating bottom plate and the grounding plate; the mounting plate is fixedly connected to the back surface of the insulating bottom plate through four M8 countersunk screws, the four M8 countersunk screws are respectively positioned at four corners of the insulating bottom plate, the head of each M8 countersunk screw is flush with the surface of the mounting plate, and the tail of each M8 countersunk screw is embedded in the insulating bottom plate; the technical problem that a grounding busbar which is small in size, light in weight, provided with an odd number of binding posts and suitable for a double-current train is lacked is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transportation, in particular to a grounding busbar. Background Art

[0002] The grounding busbar provides a grounding conductor and connects various metal parts in the system to establish an isoelectric system. The voltage of this isoelectric system is almost zero, which can protect the safety of personnel and equipment in the event of overcurrent or fault.

[0003] The busbars used in existing rail trains are mainly divided into two types according to the number of terminals: four-terminal busbars and two-terminal busbars. With the development of dual-flow urban express trains, the electrical components on dual-flow express trains have changed compared to existing ordinary trains. Conventional four-terminal busbars and two-terminal busbars both have an even number of terminals. When the wiring requirement is an odd number, there will inevitably be idle terminals.

[0004] For example, the Chinese patent application number 202222404440.6, "A four-post bus suitable for axle-end grounding of urban rail trains," provides a four-post bus structure. However, dual-current rapid rail trains need to configure electrical component groups separately for both DC and AC power supply voltages. Dual-current rapid rail trains require lighter and smaller accessories, so the existing four-post bus structure is no longer applicable. Utility Model Content

[0005] The utility model aims to provide a grounding busbar to solve the technical problem of lack of a grounding busbar which is small in size, light in weight and has an odd number of terminals and is suitable for dual-current trains.

[0006] To achieve the above-mentioned object, the utility model adopts the following technical solution: a grounding busbar, comprising an insulating base plate, a grounding plate, and a mounting plate for fixing to the train, wherein the grounding plate is fastened to the front face of the insulating base plate by three M10 bolts for connecting the negative line of train equipment, and an insulating sealant for pre-fixing is applied between the insulating base plate and the grounding plate;

[0007] The mounting plate is fastened to the back of the insulating base plate by 4 M8 countersunk screws. The 4 M8 countersunk screws are located at the four corners of the insulating base plate. The heads of the M8 countersunk screws are flush with the surface of the mounting plate, and the tails of the M8 countersunk screws are embedded in the insulating base plate.

[0008] The principle and advantages of this solution are: the M10 bolts not only serve as the terminal posts but also as the connectors that fix the insulating base plate and the grounding plate. Compared with the existing technology, the bolts that only serve to connect the insulating base plate and the grounding plate are eliminated. The insulating sealant between the insulating base plate and the grounding plate facilitates the maintenance of a stable relative position between the insulating base plate and the grounding plate when the terminal posts are connected. The insulating sealant also improves the safety of the grounding busbar.

[0009] M8 countersunk screws are inserted from the mounting plate into the insulating base plate, with the screw heads flush with the mounting plate surface and the screw tails embedded in the insulating base plate. This makes the M8 countersunk screws invisible to the grounding busbar, reducing the area occupied by the grounding busbar and preventing the protruding M8 countersunk screws from interfering with cable connections. The front of the insulating base plate connected to the grounding plate contacts the cables, preventing the M8 countersunk screws from conducting current to the mounting plate compared to existing technologies.

[0010] This solution provides a grounding busbar with three terminals, filling the gap of the lack of an odd number of terminals. The grounding busbar reduces the use of bolts, thereby reducing the overall weight. At the same time, it also eliminates the space for mounting bolts, reducing the size of the grounding busbar. Only the M8 countersunk screws used for connection are embedded inside the grounding busbar, avoiding interference with the installation environment, reducing the size and improving safety.

[0011] As an improvement, the grounding plate is 120 mm long and 40 mm wide, and the three M10 bolts are linearly arranged in sequence at intervals in the center of the grounding plate.

[0012] The beneficial effect of this improvement is that the size of the grounding plate is reduced, ensuring that it can achieve the grounding function while being firmly connected to the insulating base plate by three M10 bolts.

[0013] As an improvement, an M10 nut is threadedly fixed on the M10 bolt, an M8 nut is threadedly fixed on the M8 countersunk screw, and toothed butterfly washers are provided between the M10 bolt and the M10 nut, and between the M8 countersunk screw and the M8 nut.

[0014] The beneficial effect of this improvement is that the toothed butterfly washer is used to enhance the firmness of the connection between the bolt or screw and the nut.

[0015] As an improvement, a first countersunk hole for accommodating the bolt head of the M10 bolt and a second countersunk hole for accommodating the M8 nut are provided in the insulating base plate. The opening of the first countersunk hole is located on the back side of the insulating base plate, and the opening of the second countersunk hole is located on the front side of the insulating base plate.

[0016] The beneficial effect of this improvement is that the openings of the two countersunk holes are distributed on different planes, and the first countersunk hole and the second countersunk hole are staggered, so that the distribution of the countersunk holes in the insulating base plate is more balanced than when concentrated on a single surface, thereby improving the strength of the insulating base plate.

[0017] As an improvement, the depths of the first countersunk hole and the second countersunk hole are both 15 mm, and the thickness of the insulating base plate is 25 mm.

[0018] The beneficial effect of this improvement is to ensure the strength of the insulating base plate.

[0019] As an improvement, the first countersunk hole and the second countersunk hole are filled with insulating sealant.

[0020] The beneficial effects of this improvement are: making the surface of the grounding busbar smoother, preventing bolts and screws from conducting electricity, and preventing water and dust accumulation in the countersunk holes, thereby protecting the bolts and screws and extending their service life.

[0021] As an improvement, the mounting plate includes a first connecting surface and a second connecting surface, one side of the first connecting surface and one side of the second connecting surface are bent at a right angle, the mounting plate is a stainless steel plate with a thickness of 4 mm, and the inner fillet radius of the bending of the first connecting surface and the second connecting surface is 4 mm.

[0022] The beneficial effects of this improvement are: ensuring the stability of the bending angle of the mounting plate and avoiding tearing of the bending portion.

[0023] As an improvement, the insulating base plate is fixedly connected to the second connecting surface, and the second connecting surface is equal in size to the back surface of the insulating base plate.

[0024] The beneficial effect of this improvement is to make the structure of the grounding bus more compact and reduce the volume of the grounding bus.

[0025] As an improvement, the grounding plate is a copper metal plate with a thickness of 5 mm, and the insulating bottom plate is an epoxy glass cloth laminate.

[0026] The beneficial effects of this improvement are: ensuring good grounding performance and safety of the grounding busbar, and reducing mass and volume.

[0027] As an improvement, the width of the mounting plate is 160 mm, and the first connecting surface is provided with two oblong holes for connecting to the train. The length of the oblong holes is 20 mm and the width is 6 mm. The two oblong holes are located in the center of the first connecting surface and are 90 mm apart.

[0028] The beneficial effects of this improvement are: ensuring that the size of the oblong hole is convenient for fixing to the train, controlling the opening position of the oblong hole while reducing the size of the first connecting surface, and improving the deformation resistance of the first connecting surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0030] Figure 2It is the front view of the embodiment of the present utility model.

[0031] Figure 3 for Figure 2 Cross-sectional view along AA.

[0032] Figure 4 for Figure 2 Cross-sectional view along BB.

[0033] Figure 5 This is the main view of the embodiment of the utility model DETAILED DESCRIPTION

[0034] The following is further described in detail through specific implementation methods:

[0035] The figure marks in the drawings of the specification include: insulating base plate 1, grounding plate 2, mounting plate 3, M10 bolt 4, M8 countersunk screw 5, M10 nut 6, M8 nut 7, first countersunk hole 8, second countersunk hole 9, first connecting surface 10, second connecting surface 11 and oblong hole 12.

[0036] Example

[0037] Basically as attached Figure 1 and attached Figure 2 As shown, the grounding busbar includes an insulating base plate 1, a grounding plate 2, and a mounting plate 3 for fixing to the train. The grounding plate 2 is fastened to the front of the insulating base plate 1 by three M10 bolts 4 for connecting the negative line of the train equipment. An insulating sealant is applied between the insulating base plate 1 and the grounding plate 2 for pre-fixation.

[0038] As attached Figure 3 and attached Figure 4 As shown, the mounting plate 3 is fastened to the back of the insulating base plate 1 by four M8 countersunk screws 5. The four M8 countersunk screws 5 are respectively located at the four corners of the insulating base plate 1. The heads of the M8 countersunk screws 5 are flush with the surface of the mounting plate 3, and the tails of the M8 countersunk screws 5 are embedded in the insulating base plate 1.

[0039] The grounding plate 2 is 120 mm long and 40 mm wide, and three M10 bolts 4 are linearly spaced in the center of the grounding plate; an M10 nut 6 is threadedly fixed on the M10 bolt 4, and an M8 nut 7 is threadedly fixed on the M8 countersunk screw 5; a toothed butterfly washer D10-20-1.6 is provided between the M10 bolt 4 and the M10 nut 6, and an M8 toothed butterfly washer D8-16-1.4 is provided between the M8 countersunk screw 5 and the M8 nut 7; the M10 bolt 4 is an M10×45 external hexagon bolt, the M8 countersunk screw 5 is an M8×25 cross countersunk screw, the M10 nut 6 is an M10 hexagon nut, and the M8 nut 7 is an M8 hexagon nut.

[0040] The insulating base plate 1 is provided with a first countersunk hole 8 for accommodating the bolt head of the M10 bolt 4 and a second countersunk hole 9 for accommodating the M8 nut 7. The opening of the first countersunk hole 8 is located on the back of the insulating base plate 1, while the opening of the second countersunk hole 9 is located on the front of the insulating base plate 1. The depth of the first countersunk hole 8 and the second countersunk hole 9 are both 15 mm. The thickness of the insulating base plate 1 is 25 mm. The first countersunk hole 8 and the second countersunk hole 9 are filled with insulating sealant.

[0041] As attached Figure 5 As shown, the mounting plate 3 includes a first connecting surface 10 and a second connecting surface 11, one side of which is bent at a right angle. The mounting plate 3 is made of 4mm thick stainless steel, and the inner radius of the bend between the first and second connecting surfaces 10, 11 is 4mm. The insulating base plate 1 is fixedly connected to the second connecting surface 11, and the second connecting surface 11 is equal in size to the back of the insulating base plate 1. The mounting plate 3 is 160mm wide, and the first connecting surface 10 is provided with two oblong holes 12 for connecting to the train. The oblong holes 12 are 20mm long and 6mm wide, and are located in the center of the first connecting surface 10 and separated by 90mm.

[0042] The ground plate 2 is a copper metal plate with a thickness of 5 mm, and the insulating base plate 1 is an epoxy glass cloth laminate.

[0043] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A grounding busbar comprising an insulating base plate, a grounding plate, and a mounting plate for fixing to a train, characterized in that: The grounding plate is fastened to the front of the insulating base plate by three M10 bolts for connecting the negative line of train equipment, and an insulating sealant is applied between the insulating base plate and the grounding plate for pre-fixing; The mounting plate is fastened to the back of the insulating base plate by 4 M8 countersunk screws. The 4 M8 countersunk screws are located at the four corners of the insulating base plate. The heads of the M8 countersunk screws are flush with the surface of the mounting plate, and the tails of the M8 countersunk screws are embedded in the insulating base plate.

2. The grounding busbar according to claim 1, wherein: The grounding plate is 120 mm long and 40 mm wide, and the three M10 bolts are linearly arranged in sequence at intervals in the center of the grounding plate.

3. The grounding busbar according to claim 2, wherein: An M10 nut is threadedly fixed on the M10 bolt, and an M8 nut is threadedly fixed on the M8 countersunk screw. Toothed butterfly washers are provided between the M10 bolt and the M10 nut, and between the M8 countersunk screw and the M8 nut.

4. The grounding busbar according to claim 3, wherein: The insulating base plate is provided with a first countersunk hole for accommodating the bolt head of the M10 bolt and a second countersunk hole for accommodating the M8 nut. The opening of the first countersunk hole is located on the back side of the insulating base plate, and the opening of the second countersunk hole is located on the front side of the insulating base plate.

5. The grounding busbar according to claim 4, characterized in that: The depths of the first countersunk hole and the second countersunk hole are both 15 mm, and the thickness of the insulating base plate is 25 mm.

6. The grounding busbar according to claim 5, characterized in that: The first countersunk hole and the second countersunk hole are filled with insulating sealant.

7. The grounding busbar according to claim 6, wherein: The mounting plate includes a first connecting surface and a second connecting surface. One side of the first connecting surface and one side of the second connecting surface are bent at a right angle. The mounting plate is a stainless steel plate with a thickness of 4 mm. The inner fillet radius of the bending of the first connecting surface and the second connecting surface is 4 mm.

8. The grounding busbar according to claim 7, wherein: The insulating bottom plate is fixedly connected to the second connecting surface, and the second connecting surface is equal in size to the back surface of the insulating bottom plate.

9. The grounding busbar according to claim 8, characterized in that: The grounding plate is a copper metal plate with a thickness of 5 mm, and the insulating bottom plate is an epoxy glass cloth laminate.

10. The grounding busbar according to claim 9, characterized in that: The width of the mounting plate is 160 mm, and the first connecting surface is provided with two oblong holes for connecting to the train. The length of the oblong holes is 20 mm and the width is 6 mm. The two oblong holes are located in the center of the first connecting surface and are spaced 90 mm apart.

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