A grounding device for railway freight car and installation method thereof

Abstract

The present invention discloses a grounding device for a railway freight car and an installation method, which solves the problem of poor overall maintainability of the railway freight car grounding device in the prior art, and has the beneficial effects of reliable structure, detachability, easy installation and use. The specific scheme is as follows: A grounding device for a railway freight car comprises a cable, wherein both ends of the cable are respectively connected to a bogie and a car body through connecting components, the connecting components comprise a connecting pin inserted into reserved holes of the bogie and the car body, a bushing is installed at the reserved hole of the connecting pin, and a locking piece is provided after the connecting pin passes through the reserved hole, the bushing and the end of the cable in sequence.

Description

Technical Field

[0001] The invention relates to the field of railway freight cars, and in particular to a grounding device for railway freight cars and an installation method thereof. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Static electricity is generated when railway freight cars rub against the air or between goods and railway freight cars during driving. If measures are not taken to effectively release the static electricity, it can easily cause safety hazards during operation, have adverse effects on components such as bearings, and damage bearings or other important spare parts. In addition, static electricity can easily generate sparks, which is very harmful to railway freight cars transporting flammable and explosive items, affecting operational safety.

[0004] The inventors have found that in the prior art, the grounding device of a freight car is often fixed to the bogie and the car body by welding and other methods. During the welding process, welding wire is used for welding, which introduces impurity elements during the welding process, increases the resistance, and makes the conductivity of the grounding device poor. The static electricity generated by the railway freight car cannot be effectively released. Moreover, the firmly fixed method of welding makes the maintainability of the grounding device relatively poor, and it is not easy to maintain the grounding device. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a grounding device for a railway freight car, which can effectively ensure the stability and reliability of the grounding device, while avoiding welding, ensuring good conductivity of the grounding device, and being detachable as a whole, thereby facilitating the maintenance and disassembly of the grounding device.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A grounding device for a railway freight car comprises a cable, wherein both ends of the cable are respectively connected to a bogie and a car body through connecting components, wherein the connecting components comprise a connecting pin inserted into reserved holes of the bogie and the car body, wherein a bushing is installed at the reserved hole of the connecting pin, and a locking piece is arranged after the connecting pin passes through the reserved hole, the bushing and the end of the cable in sequence, and wherein the connecting pin has a set taper at a section in contact with the bushing.

[0008] In the above-mentioned grounding device, the cable is connected to the bogie and the car body through the connecting component, and there is no need for welding to fix the connection, which is convenient for maintenance of the grounding device. At the same time, the connecting pin and the bushing are inserted into the reserved hole to perform the first layer of locking between the connecting component and the car body or the bogie, and then the locking component is set to ensure that the cable end is in reliable contact with the connecting pin and the bushing end, and the second layer of locking is achieved. In the locking process of the locking component, the bushing can be completely in contact with the reserved hole of the bogie mounting plate or the car body underframe auxiliary beam, fully ensuring the connection reliability of the connecting component.

[0009] In the above-mentioned grounding device for railway freight cars, a locking member is required to lock the connecting pin, and the connecting pin is a conical pin;

[0010] Alternatively, the connecting pin has a tapered section whose size gradually decreases from the end of the connecting pin to the middle of the connecting pin, and the other section of the connecting pin is a cylinder, and a thread for cooperating with the locking piece is provided on the circumference of the cylindrical section, and the corresponding locking piece is a locking nut.

[0011] In a grounding device for a railway freight car as described above, the inner surface of the bushing matches with the outer surface of the connecting pin, and the inner surface of the bushing also has a set taper to better match with the connecting pin, so that the diameter of the connecting pin gradually decreases from a tapered section, while the inner diameter of the bushing gradually increases.

[0012] In the grounding device for railway freight cars as described above, in order to further ensure the stability and reliability of the setting of the connecting components, the bushing and the connecting pin are fitted with an interference fit.

[0013] In the grounding device for railway freight cars as described above, in order to release static electricity, the two ends of the cable are respectively connected to the connecting pin through a conductive joint, the conductive joint is provided with an opening, and the connecting pin is arranged through the opening of the conductive joint.

[0014] In the above-mentioned grounding device for railway freight cars, in order to release the self-charge of the railway freight cars, the conductive joint is made of a conductive material, and the material of the conductive joint is a non-ferrous metal or a conductive carbon fiber material.

[0015] In the grounding device for a railway freight car as described above, the bushing is a flange-type bushing, and a convex edge is circumferentially arranged on one side of the bushing close to the conductive joint, and the size of the convex edge is larger than the size of the conductive joint.

[0016] In the grounding device for a railway freight car as described above, the length of the bushing is less than or equal to the length of the tapered section of the connecting pin.

[0017] In a second aspect, the present invention further discloses a method for installing a grounding device for a railway freight car, comprising the following contents:

[0018] First install one end of the grounding device and drill a reserved hole in the bogie or car body;

[0019] The connecting pin passes through the reserved hole, the bushing and the cable end in sequence, and a locking piece is provided on one side of the cable end relative to the bushing;

[0020] Continue to tighten or pull the locking piece to allow the bushing to expand in the reserved hole and eventually make full contact with the reserved hole.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1) The arrangement of the connecting component of the present invention can realize the detachable connection between the cable and the bogie or the car body, and the reliability and stability of the connection between the connecting component and the bogie or the car body are ensured by the arrangement of the connecting pin and the locking member. At the same time, the grounding device is detachably arranged relative to the bogie or the car body, which is convenient for maintenance of the grounding device and is convenient for installation and use as a whole.

[0023] 2) The present invention can cooperate with the connecting pin to insert into the reserved hole of the bogie or the car body through the setting of the bushing. Under the setting of the locking piece, the bushing can gradually fill the reserved hole and fully contact the reserved hole, further ensuring the reliability and stability of the connection between the grounding device and the car body or the bogie.

[0024] 3) The present invention provides a connecting pin with a set taper on one side, which has good self-locking properties. When matched with the bushing, the reliability of the connection component can be ensured. The connecting pin is easy to install and the maintenance of the grounding device is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 The present invention is a schematic diagram of connecting one end of a grounding device for a railway freight car to a bogie mounting plate according to one or more embodiments of the present invention.

[0027] Figure 2 is a schematic diagram of a grounding device for a railway freight car according to one or more embodiments of the present invention.

[0028] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0029] Among them: 1 connecting pin, 2 bushing, 3 locking piece, 4 mounting plate, 5 conductive connector, 6 cable. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0032] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0033] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] As introduced in the background technology, there is a problem in the prior art that static electricity in railway freight cars needs to be effectively released. In order to solve the above technical problem, the present invention proposes a grounding device and an installation method for railway freight cars.

[0035] In a typical embodiment of the present invention, reference is made to Figure 1 and Figure 2 As shown, a grounding device for a railway freight car includes a connecting pin 1, a bushing 2, a locking piece 3, a conductive joint 5 and a cable 6. Conductive joints 5 are respectively arranged at both ends of the cable. The conductive joint 5 has an opening to facilitate the passage of the connecting pin. Connecting pins are arranged on the bogie and the car body through reserved holes. Bushings are installed at the reserved holes of the connecting pins. The cable is connected to the bogie and the car body through the conductive joint and the connecting pin. A locking piece is arranged on the other side of the conductive joint relative to the bushing. The locking piece can be a locking nut.

[0036] The section of the connecting pin 1 that contacts the bushing has a set taper. The size of the tapered section of the connecting pin gradually decreases from the end of the connecting pin to the middle of the connecting pin. The other section is a cylinder, and a thread is provided on the circumference of the cylindrical section to facilitate connection with the locking piece. The diameter of the connecting pin is Φ3~Φ60, and the length of the tapered section of the connecting pin is L.

[0037] In order to increase the contact area with the conductive joint, the bushing is a flange-type bushing, and a convex edge is circumferentially arranged on one side of the bushing close to the conductive joint. The convex edge and the bushing body are an integral structural part, and the size of the convex edge is larger than the size of the conductive joint to ensure sufficient contact, thereby effectively ensuring the release of static electricity. The bushing is a rigid part, and the length of the flange-type bushing is less than or equal to the length L of the tapered section of the connecting pin, and the bushing and the reserved hole are also interference fit, and the inner surface of the flange-type bushing can cooperate with the connecting pin. The inner surface of the bushing also has a set taper to better cooperate with the connecting pin, so that the connecting pin gradually decreases in diameter from the tapered section, while the inner diameter of the bushing gradually increases.

[0038] The locking piece is fixed in cooperation with the connecting pin on the bogie mounting plate or the vehicle body underframe auxiliary beam. Of course, it can also be installed at other positions of the vehicle body or the bogie as long as it does not interfere with the operation of the bogie. At the same time, the conductive joint is fixed. In some examples, the locking piece can be a self-locking nut; the conductive joint is made of conductive material.

[0039] In the above-mentioned grounding device, the cable is connected to the bogie and the car body through a connecting component, and there is no need for welding to fix the connection, which facilitates the maintenance of the grounding device. The whole device is detachable, and the connecting pin is set through the reserved hole of the mounting plate or the auxiliary beam of the car body frame, the flange-type bushing and the conductive joint. At the same time, the connecting pin and the bushing are inserted into the reserved hole to perform the first layer of locking between the connecting part and the car body or the bogie, and then the locking part is set to ensure the reliable contact between the cable end and the connecting pin, and the second layer of locking is achieved. In addition, during the locking process of the locking part, the bushing can be completely in contact with the reserved hole of the bogie mounting plate or the auxiliary beam of the car body frame, fully ensuring the connection reliability of the connecting part.

[0040] The overall grounding device is set up because the bogie is connected to the wheels. In this way, the static electricity generated during the operation of the car body is transmitted to the bogie through the cable, and the static electricity generated at the bogie is transmitted to the track through the wheels and is effectively released.

[0041] A method for installing a grounding device for a railway freight car includes the following contents:

[0042] One end of the grounding device is first installed on the bogie mounting plate or the auxiliary beam of the vehicle body frame. According to the size of the threaded connecting pin 1, a hole is drilled on the bogie mounting plate 4 (such as the front cover of the axle box). The connecting pin 1 passes through the mounting plate 4, the flange bushing 2 and the conductive connector 5 in sequence. The locking part 3 is continuously tightened or pulled by a manual part such as a wrench to expand the bushing in the reserved hole of the mounting plate and finally fully contact the reserved hole, thereby ensuring the connection reliability. In the same way, the other end of the grounding device is connected to the auxiliary beam of the vehicle body frame or the bogie mounting plate, thereby ensuring that the static electricity of the truck itself can be effectively released.

[0043] The grounding device provided by the present invention has a reliable structure, is detachable, easy to install and use, can be used for remodeling vehicles, and can also be used for newly manufactured vehicles, and can specifically be applied to other rail vehicles such as subways.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A grounding device for a railway freight car, characterized in that: The cable comprises a cable, both ends of which are connected to the bogie and the car body respectively through a connecting component, the connecting component comprises a connecting pin inserted into a reserved hole of the bogie and the car body, a bushing is installed at the reserved hole of the connecting pin, and a locking piece is arranged after the connecting pin passes through the reserved hole, the bushing and the end of the cable in sequence, and the connecting pin has a set taper at a section in contact with the bushing; The bushing is a flange-type bushing, and a convex edge is circumferentially arranged on one side of the bushing close to the conductive joint, and the size of the convex edge is larger than the size of the conductive joint; The bushing is a rigid part, and the length of the bushing is less than or equal to the taper section of the connecting pin. length; The bushing and the reserved hole are interference fit, the inner surface of the flange-type bushing can be matched with the connecting pin, and the inner surface of the bushing has a set taper; The connecting pin is a conical pin; The connecting pin has a tapered section whose size gradually decreases from the end of the connecting pin to the middle of the connecting pin, and the other section of the connecting pin is a cylinder, and a thread for cooperating with the locking member is arranged on the circumference of the cylinder section; The connecting pin and the bushing are inserted into the reserved hole to perform the first level of locking between the connecting piece and the car body or the bogie. The setting of the locking piece ensures reliable contact between the cable end and the connecting pin, thereby achieving the second level of locking.

2. A grounding device for a railway freight car according to claim 1, characterized in that: The inner surface of the bushing matches the outer surface of the connecting pin.

3. A grounding device for a railway freight car according to claim 1, characterized in that: The fitting between the bushing and the connecting pin is an interference fit.

4. A grounding device for a railway freight car according to claim 1, characterized in that: Both ends of the cable are connected to the connecting pins via conductive connectors.

5. A grounding device for a railway freight car according to claim 1, characterized in that: The conductive joint is made of non-ferrous metal or conductive carbon fiber material.

6. A method for installing a grounding device for a railway freight car according to any one of claims 1 to 5, characterized in that: It includes the following: First install one end of the grounding device and drill a reserved hole in the bogie or car body; The connecting pin passes through the reserved hole, the bushing and the cable end in sequence, and a locking piece is provided on one side of the cable end relative to the bushing; Continue to tighten or pull the locking piece to allow the bushing to expand in the reserved hole and eventually make full contact with the reserved hole.

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