Railway wagon bogie shaft end protection grounding device and installation method

Abstract

The invention belongs to the technical field of railway vehicle grounding protection, and particularly relates to a railway wagon bogie shaft end protection grounding device and an installation method.The railway wagon bogie shaft end protection grounding device comprises a rotating body fixed to the end of an axle, a conductive barrel is rotationally arranged on the rotating body, and the rotating body and the conductive barrel make contact with each other and conduct electricity; the rotating body is provided with a stop block, the stop block is used for axially limiting the conductive barrel, the conductive barrel is connected with a connecting wire, the connecting wire is used for being connected with an adapter or a side frame of the bogie, and electricity on the adapter or the side frame is guided into the ground through the rotating body and the axle. According to the invention, the protective grounding of part of tank trucks and the like for transporting special flammable and explosive goods is effectively realized, and the damage and dust pollution to bearings are avoided; the structure is simple, small and exquisite, the principle is simple, the shaft end anti-loose gasket can be directly and simply modified to be installed, manufacturing and maintenance are easy, cost is low, and the structure can be widely applied.

Description

Technical Field

[0001] The invention belongs to the technical field of railway vehicle grounding protection, and in particular relates to a railway freight car bogie axle end protection grounding device and an installation method. Background Art

[0002] The grounding protection of metal parts of railway vehicles is divided into protective grounding, functional grounding, and electromagnetic compatibility grounding. A grounding device should be used between the bogie frame (side frame) and the wheelset to protect the bearings and prevent electrical corrosion. The grounding of railway vehicles such as passenger cars and urban rails is mainly functional grounding. Since there is no electricity on the train, the grounding of railway freight cars is mainly protective grounding, which conducts the static electricity on the vehicle into the rails. At present, the grounding device on the passenger car is mainly installed at the axle end. The bearing is completely wrapped with an axle box body, and the axle end grounding is installed inside the axle box front cover. The wear plate is fixed to the axle end and rotates with the axle. The carbon brush structure is fixed to the axle box front cover and does not rotate. When the vehicle is running, the carbon brush and the wear plate are worn against each other to achieve current conduction. This structure can withstand a strong current load and is suitable for structures with axle boxes. The structure is complex and the cost is high.

[0003] A Chinese invention patent application with application publication number CN115027521A discloses a load-bearing saddle composition suitable for installing an axle end grounding device on a freight car bogie. The axle end grounding device increases the strength requirements of important components of the load-bearing saddle by opening bolt holes on the load-bearing saddle. A grounding device with a complex structure and a larger weight than the load-bearing saddle itself is installed on one side of the load-bearing saddle. During installation, the load-bearing saddle will be tilted toward the heavier side, increasing the difficulty of installation and the risk of damaging the outer ring of the bearing. During use, due to wheel-rail vibration and micro-wear of the load-bearing saddle on the outer ring of the bearing, the force distribution on both sides of the load-bearing saddle is uneven, which can easily cause accelerated wear of the outer ring of the bearing.

[0004] The Chinese invention patent application with application publication number CN108058718A discloses a high-speed EMU bogie axle end grounding device of a new structure which cannot adapt to the current railway passenger car bogie, where the bearings are exposed and the three-piece railway freight car bogie equipped with a load-bearing saddle is installed, which has a complex structure, high cost, inconvenient installation and maintenance, and the carbon brush will cause dust pollution after wear. Summary of the invention

[0005] The purpose of the present invention is to provide a railway freight car bogie axle end protective grounding device and installation method, which effectively solves the protective grounding of some tank cars that transport special flammable and explosive goods, and avoids damage to bearings and dust pollution; the structure is simple and compact, the principle is simple, and the installation can be done by simply modifying the axle end anti-loosening gasket. The manufacturing and maintenance are simple, the cost is low, and it can be widely promoted.

[0006] To achieve the above-mentioned purpose, in a first aspect, the present invention provides an axle-end protective grounding device for a railway freight car bogie, comprising a swivel fixed to the end of an axle, a conductive cylinder rotatably arranged on the swivel, the swivel and the conductive cylinder contact each other and conduct electricity, an end stop is arranged on the swivel, the end stop is used to limit the axial position of the conductive cylinder, a connecting wire is connected to the conductive cylinder, the connecting wire is used to connect to a load-bearing saddle or a side frame of the bogie, and the electricity on the load-bearing saddle or the side frame is introduced into the ground through the swivel and the axle.

[0007] In some embodiments, the swivel includes a conductive bolt, and the conductive cylinder includes a thread-slipping nut, and the conductive cylinder cannot be screwed out of the swivel due to thread slippage.

[0008] In some embodiments, the surfaces of the rotor and the conductive cylinder that are in contact with each other are coated with a conductive medium.

[0009] In some embodiments, a protective cover is included, wherein the protective cover and the swivel are both fixed on an anti-loosening washer at the end of the axle, and the swivel is arranged in the protective cover.

[0010] Furthermore, a hole is formed at one end of the protective cover away from the anti-loosening gasket at the shaft end, and a conductive wire is arranged at one end of the conductive cylinder, and the conductive wire passes through the hole and is connected to the connecting wire.

[0011] Furthermore, a fan is fixedly arranged on the rotating body, and the fan can rotate together with the rotating body. The fan is arranged at an end of the conductive tube away from the hole.

[0012] Furthermore, a rubber sleeve is arranged on the inner wall of the hole.

[0013] In some embodiments, the contact wire comprises a coil spring.

[0014] Furthermore, the swivel is coaxially arranged with the axle.

[0015] In a second aspect, the present invention provides a method for installing a railway freight car bogie axle end protection grounding device, comprising:

[0016] Fix the swivel to the anti-loosening washer at the shaft end by threading or welding;

[0017] Install the fan onto the swivel, insert the conductive tube into the swivel from the end away from the shaft end anti-loosening gasket, and install the second stopper on the end of the swivel away from the shaft end anti-loosening gasket;

[0018] Install the protective cover on the anti-loosening gasket at the shaft end, and make the conductive wires on the conductive tube pass through the holes of the protective cover;

[0019] Connect one end of the connecting wire to the conductive wire and the other end of the connecting wire to the load saddle or side frame.

[0020] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0021] 1. The present invention has a simple structure and light weight, will not damage the bearing, and will not cause dust pollution.

[0022] 2. The swivel of the present invention can use conductive bolts, and the conductive cylinder can use sliding nuts. The conductive cylinder cannot be rotated out of the swivel due to sliding threads, thereby achieving that the swivel and the conductive cylinder can rotate relative to each other and contact and conduct electricity.

[0023] 3. The present invention provides a protective cover, which can not only prevent dust, but also prevent rails, stones, etc. from hitting the swivel and the conductive cylinder during operation.

[0024] 4. The present invention provides a rubber sleeve on the hole of the protective cover, which can play a proper buffering role during the operation of the column.

[0025] 5. The present invention provides a fan, which rotates along with the rotating body. The wind generated by the fan blows toward the conductive tube and the hole. The fan can prevent dust from entering the protective cover through the hole while dissipating heat.

[0026] 6. The present invention can be installed on the axle ends of different types of bogies. It only requires simple modification of the axle end anti-loosening gasket and no other modification of the bogie is required. It has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the internal structure of the protective cover of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the protective cover of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the shaft end anti-loosening gasket of the present invention;

[0031] Figure 5 It is a structural schematic diagram of the rotary body of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of the conductive tube of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure after the present invention is installed on the axle end of the bogie.

[0034] Figure numerals: protective cover 1; groove 11; hole 12; shaft end anti-loosening gasket 2; connecting wire 3; bolt 4; swivel 5; mounting groove 51; first end stop 52; second end stop 53; fan 6; conductive tube 7; sliding nut 71; conductive wire 72; connecting hole 73. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the embodiments should not be construed as limiting the present invention.

[0036] like Figure 2 As shown, the present invention provides a railway freight car bogie axle end protection grounding device, comprising a swivel 5 fixed to the end of the axle (i.e., the bogie axle end), the swivel 5 is cylindrical, the swivel 5 is coaxially arranged with the axle, and a conductive cylinder 7 is rotatably arranged on the swivel 5. The swivel 5 and the conductive cylinder 7 are in contact with each other and conduct electricity. The length of the conductive cylinder 7 is less than the length of the swivel 5. Figure 5 As shown, an end stop is provided on the swivel 5, and the end stop includes a first end stop 52 and a second end stop 53. The first end stop 52 and the swivel 5 are an integral structure, and the second end stop 53 is connected to the swivel 5 by welding, a slot, etc. The end stop is used to limit the axial position of the conductive tube 7 so that the conductive tube 7 cannot escape from the swivel 5. The conductive tube 7 is connected with a connection wire 3, and the connection wire 3 is used to connect with the load-bearing saddle or side frame of the bogie to introduce the electricity on the load-bearing saddle or side frame into the ground through the swivel 5 and the axle.

[0037] It can be understood that when the train is running, the swivel 5 will rotate with the axle, and the electricity on the car body will be conducted to the bogie, then to the load saddle and the side frame, and then to the conductive cylinder 7 through the connecting wire 3. Since the swivel 5 and the conductive cylinder 7 are in contact with each other and conduct electricity, the electricity can be conducted to the rail through the swivel 5 and the axle, and finally to the ground. The structure is simple, light, will not damage the bearing, and will not cause dust pollution.

[0038] In some embodiments, the swivel 5 is a conductive bolt, and the conductive tube 7 is a thread-slip nut 71 . The conductive tube 7 cannot be screwed out of the swivel 5 due to thread slip.

[0039] In some embodiments, in order to enhance the conductivity, the surfaces of the rotating body 5 and the conductive cylinder 7 that are in contact with each other are coated with a conductive medium, and the conductive medium may be graphite or the like.

[0040] In some embodiments, Figure 1 As shown, it also includes a protective cover 1, the protective cover 1 and the swivel 5 are fixed on the shaft end anti-loosening gasket 2 of the axle, and the swivel 5 is arranged in the protective cover 1. The protective cover 1 can not only play a dust-proof role, but also prevent the rails and stones from hitting the swivel 5 and the conductive cylinder 7 during operation.

[0041] The swivel 5 can be fixed on the shaft end anti-loosening gasket 2 by means of threads or welding, and the protective cover 1 is fixed on the shaft end anti-loosening gasket 2 by means of bolts 4.

[0042] like Figure 3As shown, a groove 11 is formed at the bottom of the protective cover 1, a sealing ring is arranged in the groove 11, a hole 12 is formed at the top of the protective cover 1, and a rubber sleeve is arranged on the inner wall of the hole 12, as shown in FIG. Figure 6 As shown, a conductive wire 72 is arranged at one end of the conductive cylinder 7, and the conductive wire 72 passes through the hole 12 to connect with the connecting wire 3, and the conductive wire 72 is in close contact with the rubber sleeve. A connecting hole 73 is provided at one end of the conductive wire 72 passing through the hole 12, and one end of the connecting wire 3 can be connected to the connecting hole 73 by hooking or winding, etc., which is easy to install and disassemble. The other end of the connecting wire 3 can be wound or clamped or connected to the side frame or the load saddle in a threaded manner, so that the current on it can be introduced into the shaft end and introduced into the wheel through the axle to avoid flowing into the bearing, such as Figure 7 shown.

[0043] It can be understood that both the sealing ring and the rubber sleeve can improve the sealing performance of the protective cover 1 and prevent external impurities from entering the protective cover 1 , while the rubber sleeve can appropriately play a buffering role.

[0044] In order to prevent the temperature in the protective cover 1 from being too high and to reduce the dust from entering the protective cover 1 through the hole 12, Figure 1 , 5 As shown, a mounting groove 51 is provided on the swivel 5, and a fan 6 is fixedly mounted on the mounting groove 51. The fan 6 can rotate together with the swivel 5, and the fan 6 is arranged at the end of the conductive cylinder 7 away from the hole 12. During the operation of the train, the fan 6 rotates together with the swivel 5, and the wind flow generated by the fan 6 blows toward the conductive cylinder 7 and the hole 12. The fan 6 can prevent dust from entering the protective cover 1 through the hole 12 while dissipating heat.

[0045] In some embodiments, the connecting wire 3 includes a coil spring. The coil spring can play a certain shock-absorbing role during the operation of the train.

[0046] The working principle of the railway freight car bogie axle end protection grounding device is:

[0047] When the train is running, the current on the car body is conducted to the bogie, then to the load saddle and side frame, and then to the conductive cylinder 7 through the connecting wire 3. The threaded nut 71 rotates relative to the swivel 5. The conductive wire 72 on the conductive cylinder 7 is kept in a non-rotating relative static state through the threaded nut 71 and the swivel 5, and the current is conducted to the swivel 5, and then to the shaft end anti-loosening gasket 2 and then to the axle. At the same time, the fan 6 rotates with the swivel 5. The wind generated by the fan 66 can cool down to a certain extent, and blow away external dust to prevent external dust from entering the protective cover 1. When the vehicle is stationary, the fan 6 stops rotating, the swivel 5 and the threaded nut 71 stop rotating relative to each other, and direct contact transmits current.

[0048] The present invention provides a method for installing a railway freight car bogie axle end protection grounding device, comprising:

[0049] Fix the swivel 5 on the shaft end anti-loosening gasket 2 by means of threads or welding;

[0050] Install the fan 6 onto the swivel 5, insert the conductive tube 7 from the end of the swivel 5 away from the shaft end anti-loosening gasket 2, and install the second end stop 53 on the end of the swivel 5 away from the shaft end anti-loosening gasket 2;

[0051] Install the protective cover 1 on the shaft end anti-loosening gasket 2, and make the conductive wire 72 on the conductive tube 7 pass through the hole 12 of the protective cover 1;

[0052] One end of the connecting wire 3 is connected to the conductive wire 72, and the other end of the connecting wire 3 is connected to the load saddle or the side frame.

[0053] like Figure 4 As shown, the railway freight car bogie axle end protection grounding device can be installed on the bogie axle end by only opening a few threaded holes for installing the protective cover 1 on the axle end anti-loosening gasket 2, without any modification to the bogie, and is widely used.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A railway freight car bogie axle end protection grounding device, Features: The invention comprises a swivel (5) fixed to the end of an axle, a conductive cylinder (7) rotatably arranged on the swivel (5), the swivel (5) and the conductive cylinder (7) contact each other and conduct electricity, a stopper is arranged on the swivel (5), the stopper is used to limit the axial position of the conductive cylinder (7), a connecting wire (3) is connected to the conductive cylinder (7), the connecting wire (3) is used to connect to the load-bearing saddle or side frame of the bogie, and the electricity on the load-bearing saddle or side frame is introduced into the ground through the swivel (5) and the axle.

2. The railway freight car bogie axle end protection grounding device according to claim 1, Features: The rotating body (5) includes a conductive bolt, and the conductive cylinder (7) includes a thread-slipping nut (71). The conductive cylinder (7) cannot be rotated out of the rotating body (5) due to thread slipping.

3. The railway freight car bogie axle end protection grounding device according to claim 1, Features: The surfaces of the rotating body (5) and the conductive cylinder (7) that are in contact with each other are coated with a conductive medium.

4. The railway freight car bogie axle end protection grounding device according to any one of claims 1 to 3, Features: It comprises a protective cover (1), wherein the protective cover (1) and a swivel (5) are both fixed on an anti-loosening gasket (2) at the end of an axle, and the swivel (5) is arranged inside the protective cover (1).

5. The railway freight car bogie axle end protection grounding device according to claim 4, Features: A hole (12) is provided at one end of the protective cover (1) away from the shaft end anti-loosening gasket (2), and a conductive wire (72) is provided at one end of the conductive tube (7), and the conductive wire (72) passes through the hole (12) and is connected to the connecting wire (3).

6. The railway freight car bogie axle end protection grounding device according to claim 5, Features: A fan (6) is fixedly arranged on the rotating body (5), and the fan (6) can rotate together with the rotating body (5). The fan (6) is arranged at an end of the conductive tube (7) away from the hole (12).

7. The railway freight car bogie axle end protection grounding device according to claim 5, Features: A rubber sleeve is arranged on the inner wall of the hole (12).

8. The railway freight car bogie axle end protection grounding device according to any one of claims 1 to 3, Features: The connecting wire (3) comprises a coil spring.

9. The railway freight car bogie axle end protection grounding device according to any one of claims 1 to 3, Features: The rotating body (5) is arranged coaxially with the axle.

10. A method for installing the railway freight car bogie axle end protection grounding device according to any one of claims 1 to 9, Features: include: The swivel (5) is fixed to the shaft end anti-loosening gasket (2) by means of threads or welding; The fan (6) is mounted on the swivel (5), the conductive tube (7) is inserted into the swivel (5) from the end away from the shaft end anti-loosening gasket (2), and the second end stop (53) is installed on the end of the swivel (5) away from the shaft end anti-loosening gasket (2); The protective cover (1) is mounted on the shaft end anti-loosening gasket (2), and the conductive wire (72) on the conductive tube (7) is passed through the hole (12) of the protective cover (1); One end of the connecting wire (3) is connected to the conductive wire (72), and the other end of the connecting wire (3) is connected to the load saddle or the side frame.

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