Traction motor and locomotive

Abstract

The utility model relates to the technical field of rail transit equipment, in particular to a traction motor and a train. The traction motor comprises a casing (1), a group of cables (2) and a set of fixing components (3). Wherein the casing (1) is provided with a port box (11), a group of copper bars (12) extend into the port box (11) from the casing (1), one end of each cable (2) is connected to one copper bar (12), and the fixing assembly (3) is arranged on the casing (1) and fixes the bent cables (2). Thus, in the traction motor, the fixing assembly (3) is arranged to fix the cable (2), so that the cable (2) of the traction motor can be prevented from vibrating in the operation process of a locomotive and being damaged due to friction between the cable (2) and the casing (1).

Description

Technical Field

[0001] The present application relates to the technical field of rail transit equipment, in particular to traction motors and locomotives. Background Art

[0002] The power system of a high-speed train includes several key components, such as traction motors, reducers, transmissions, drive wheels, etc. Generally speaking, the most critical components are traction motors and reducers. As the secondary voltage regulating device of the traction transformer, the railway locomotive converter can convert the DC power input from the contact network into AC power to provide power for the traction motor. In addition, the traction motor control of high-speed trains generally adopts AC traction motor control technology, and its controller controls the train's running status by controlling the current, speed and position of the traction motor.

[0003] The traction motor consists of two parts: the stator and the rotor. The stator is stationary and consists of a large number of coils and an iron core. The coils are connected to external cables (U, V, W,) for electrical connection to the converter. During the operation of the train, the cables will frequently vibrate periodically, and the cable fixing structure plays a vital role in protecting the cables. Summary of the invention

[0004] In view of this, the present application proposes a traction motor and a locomotive to prevent the cable of the traction motor from being damaged due to vibration and friction with the casing during the operation of the locomotive.

[0005] In a first aspect, in an embodiment of the traction motor provided by the present application, the traction motor includes a housing, a group of cables and a set of fixing components. A port box is provided on the housing, and a group of copper bars extend from the housing to the port box. One end of each cable is connected to one of the copper bars, and the other end extends out of the port box and then bends and extends away from the extension direction. The fixing component is provided on the housing, and fixes the bent cables and separates the cables from the outer wall of the housing.

[0006] Thus, in the traction motor, by providing a fixing assembly to fix the cable, it is possible to avoid damage to the cable caused by vibration and friction with the casing during the operation of the locomotive.

[0007] In a preferred implementation of the traction motor provided in the above embodiment, the fixing assembly includes a support plate and a set of clamping plate assemblies. The support plate is fixed to the housing. The clamping plate assembly includes a bottom plate and a top plate connected to each other, which are fixed to the support plate, and three inclined holes are formed between the top plate and the bottom plate, and the hole walls of the three inclined holes press the cable and make the cable extend obliquely downward.

[0008] In a preferred implementation manner of the traction motor provided in the above embodiment, the fixing assembly also includes a pad, which is fixed to the support plate and is located on the side of the support plate close to the port box relative to the clamping plate assembly; and a plurality of wing strips are formed at intervals on both sides of the pad so that a group of cables can be bolted to the pad respectively through straps.

[0009] In a preferred implementation manner of the traction motor provided in the above embodiment, the middle portion of the support plate is bent into a groove and a bent edge is formed on the side away from the port box, the bottom of the groove is fastened to the casing by bolts, and the bent edge is fixed to the other side of the casing by another bolt, and one end of the support plate close to the port box is suspended.

[0010] In a preferred implementation manner of the traction motor provided in the above embodiment, three insulators are also arranged in the port box, one insulator is connected to a screw passing through the casing, one of the copper busbars and a wire nose is connected to the other end of the insulator through another screw, and the other end of the wire nose is crimped together with the conductor of the cable.

[0011] In a preferred implementation of the traction motor provided in the above embodiment, three sets of fastening components are also provided on the port box for a group of cables to pass through and fix. The front end of the cable exposes the shielding layer, and the fastening component includes a group of inner fastening rings and outer fastening rings, a sleeve, a rubber sleeve and a nut. After the cable passes through the inner hole of the inner fastening ring, the shielding layer of the cable is pressed on the outer wall of the inner fastening ring, and the outer fastening ring is sleeved on the outer side of the inner fastening ring and presses the shielding layer of the cable; wherein the outer part of the inner fastening ring and the inner part of the outer fastening ring are both conical. The sleeve is provided with a first external threaded portion, an outer limiting ring and a second external threaded portion, which is connected to the side wall of the port box through the first external threaded portion, the outer limiting ring abuts against the outer wall of the port box, and an annular step is formed inside the sleeve; the inner fastening ring abuts against the annular step. The rubber sleeve includes a small diameter section and a large diameter section, and the small diameter section extends into the sleeve and abuts against the end face of the outer fastening ring. The nut is threadedly connected to the second external threaded portion, and an inner limit ring is formed at its rear end. When the nut is tightened, the large diameter section of the rubber sleeve is pressed, the rubber sleeve is squeezed to clamp the cable, and the outer fastening ring is compressed to complete the connection.

[0012] In a preferred implementation manner of the traction motor provided in the above embodiment, the fastening assembly further includes an O-ring, which is arranged between the first external threaded portion of the sleeve and the external limiting ring.

[0013] In a preferred implementation manner of the traction motor provided in the above embodiment, the bending angle of the cable is 90 degrees.

[0014] In a preferred implementation manner of the traction motor provided in the above embodiment, the cable is a shielded cable, and comprises a conductor, an insulating layer, a shielding layer and a sheath layer in sequence from the inside to the outside.

[0015] In a second aspect, in an embodiment of a locomotive provided in the present application, the traction motor described in any embodiment of the first aspect of the locomotive. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can better understand the above and other features and advantages of the present application. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a traction motor of the present application.

[0018] Figure 2 This is a schematic diagram of the connection structure between the fixed component and the cable in the traction motor of the present application.

[0019] Figure 3 This is a schematic diagram of the internal structure of the port box in the traction motor of the present application.

[0020] Figure 4 It is a cross-sectional schematic diagram of a fastening assembly in a traction motor of the present application.

[0021] The reference numerals are as follows:

[0022] 1- housing;

[0023] 11-port box; 111-insulator;

[0024] 12-Copper busbar;

[0025] 2-cable; 21-cable nose;

[0026] 3-Fix the components;

[0027] 31- support plate; 311- groove; 312- bent edge;

[0028] 32- splint assembly;

[0029] 33- pad; 331- wing ray;

[0030] 4- Fastening components;

[0031] 41-sleeve; 411-first external threaded portion; 412-external limiting ring; 413-second external threaded portion; 414-annular step;

[0032] 42-nut; 421-inner limit ring;

[0033] 43- rubber sleeve; 431- small diameter section; 432- large diameter section;

[0034] 44-O-ring;

[0035] 451 - inner fastening ring; 452 - outer fastening ring. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail with reference to the following embodiments.

[0037] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 a limitation on the present application. Also, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the term "connected" should be understood in a broad sense, for example, it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0038] The power system of a high-speed train includes multiple key components, such as a traction motor, a reducer, a transmission, a transmission wheel, etc. The locomotive in this embodiment is a carriage provided with a traction motor.

[0039] like Figure 1 The traction motor provided in this embodiment is installed on a locomotive, and its cable 2 is connected to a power input device located above it, such as a junction box connected to the power input terminal of a main inverter. For example, the cable 2 connected to the traction motor is generally folded down first, and then folded up to connect to the power input device located above it.

[0040] Reference Figures 1 to 4The traction motor includes a housing 1, a group of cables 2 and a set of fixing components 3. A port box 11 is provided on the housing 1, and a group of copper bars 12 extend from the housing 1 to the port box 11. The traction motor contains a stator and a rotor. The stator is stationary and is composed of a large number of coils and an iron core, from which a group of three-phase copper bars 12 (U, V, W three-phase) are led out. One end of each cable 2 is connected to a copper bar 12, and the other end extends out of the port box 11 and then bends and extends away from the extending direction. The fixing component 3 is provided on the housing 1 and fixes the bent cable 2. In this way, in the traction motor, by providing the fixing component 3 to fix the cable 2, it is possible to avoid damage to the cable 2 caused by vibration and friction with the housing 1 during the operation of the locomotive.

[0041] Preferably, the bending angle of the cable 2 can be 90 degrees. In one embodiment, the cable 2 is perpendicular to the running direction of the train when it is extended from the junction box, and is along the running direction of the train after being bent 90 degrees. That is, the outlet direction of the cable 2 is perpendicular to the running direction of the train. In this way, the requirement of connecting the cable 2 to the power input device located above the traction motor can be better met.

[0042] Continue to refer to Figure 1 In a preferred embodiment, the fixing assembly 3 includes a support plate 31 and a set of clamping plate assemblies 32. The support plate 31 is fixed on the housing 1, and the clamping plate assembly 32 includes a bottom plate and a top plate connected to each other. The clamping plate assembly 32 is fixed on the support plate 31, and three oblique holes are formed between the top plate and the bottom plate. The hole walls of the three oblique holes press the cable 2 and make the cable 2 extend obliquely downward. In this way, it is convenient for the cable 2 to be bent upward and connected to the power input device located above it.

[0043] Reference Figure 2 Preferably, the fixing assembly 3 further includes a pad 33, which is fixed on the support plate 31, and the pad 33 is located on the side of the support plate 31 close to the port box 11 relative to the clamping plate assembly 32. In addition, a plurality of wing strips 331 are formed at intervals on both sides of the pad 33, so that a group of cables 2 can be bolted to the pad 33 respectively through binding straps. For example, both ends of the pad 33 in the length direction can be connected to the support plate 31 by bolts. The pad 33 can be made of polyvinyl chloride (PVC) material, which plays the role of supporting the cable 2 on the one hand, and also plays the role of fixing the cable 2 on the other hand, so as to prevent friction damage between the cable 2 and the support plate 31 or the housing 1 of the traction motor.

[0044] Continue to refer to Figure 1The middle part of the support plate 31 is bent into a groove 311 and a bent edge 312 is formed at one end away from the port box 11. The bottom of the groove 311 is fastened to the casing 1 by bolts, and the bent edge 312 is fixed to the other side of the casing 1 by another bolt, and the end of the support plate 31 close to the port box 11 is suspended. In this way, the support plate 31 is connected to the other side of the casing 1, which facilitates the cable 2 to extend from the other side of the casing 1 without contacting the casing 1 or the bracket, reducing wear. On the other hand, the bracket is not entirely attached to the casing 1, avoiding the influence on the heat dissipation of the traction motor. In addition, the end of the support plate 31 close to the port box 11 is suspended, which reduces the screw connection with the casing 1. While meeting the requirements for fixing the cable 2, it reduces the drilling of holes on the casing 1, making the installation of the fixing component 3 more convenient.

[0045] Reference Figure 3 Three insulators 111 are also arranged in the terminal box 11 of the traction motor. One insulator 111 is connected to a screw passing through the casing 1. A copper busbar 12 and a wire nose 21 are connected to the other end of the insulator 111 through another screw. The other end of the wire nose 21 is crimped together with the conductor of the cable 2. In this way, the insulator 111 plays a role in supporting the copper busbar 12 and the wire nose 21 to prevent the copper plate from being damaged by vibration.

[0046] For example, the cable 2 may be a shielded cable, and includes a conductor, an insulating layer, a shielding layer and a sheath layer from the inside to the outside, so that the transmission performance of the system can be guaranteed in an environment with electromagnetic interference.

[0047] Combination Figure 1 and Figure 4In a further preferred embodiment, three sets of fastening components 4 are also provided on the port box 11 for a group of cables 2 to pass through and fix. The front end of the cable 2 exposes the shielding layer, and the fastening component 4 includes a set of inner fastening rings 451 and outer fastening rings 452, a sleeve 41, a rubber sleeve 43 and a nut 42. After the cable 2 passes through the inner hole of the inner fastening ring 451, the shielding layer of the cable 2 is pressed on the outer wall of the inner fastening ring 451, and the outer fastening ring 452 is sleeved on the outer side of the inner fastening ring 451 and presses the shielding layer of the cable 2; wherein the outer part of the inner fastening ring 451 and the inner part of the outer fastening ring 452 are both conical. The sleeve 41 is provided with a first external threaded portion 411, an external stop ring 412 and a second external threaded portion 413. The sleeve 41 is connected to the side wall of the port box 11 through the first external threaded portion 411. The external stop ring 412 abuts against the outer wall of the port box 11, and an annular step 414 is formed inside the sleeve 41; the inner fastening ring 451 abuts against the annular step 414. The rubber sleeve 43 includes a small diameter section 431 and a large diameter section 432. The small diameter section 431 extends into the sleeve 41 and abuts against the end surface of the outer fastening ring 452. The nut 42 is threadedly connected to the second external threaded portion 413, and an inner stop ring 421 is formed at its rear end. When the nut 42 is tightened, the large diameter section 432 of the rubber sleeve 43 is pressed against the rubber sleeve 43, and the rubber sleeve 43 is squeezed to clamp the cable 2, and the outer fastening ring 452 is pressed to complete the connection.

[0048] Continue to refer to Figure 4 The fastening assembly 4 may also include an O-ring 44, which is disposed between the first external threaded portion 411 of the sleeve 41 and the external limit ring 412 to seal and prevent dust and water from entering the port box 11 or the housing 1 of the traction motor through the gap.

[0049] The present application relates to the technical field of rail transit equipment, in particular to traction motors and trains. The traction motor comprises a housing 1, a group of cables 2 and a set of fixing components 3. Among them, a port box 11 is provided on the housing 1, and a group of copper bars 12 extend from the housing 1 to the port box 11, one end of each cable 2 is connected to a copper bar 12, and the fixing component 3 is provided on the housing 1 to fix the bent cable 2. In this way, in the traction motor, by providing the fixing component 3 to fix the cable 2, the cable 2 of the traction motor can be prevented from vibrating during the operation of the locomotive and being damaged by friction with the housing 1.

[0050] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. The nouns and pronouns about people in this patent application are not limited to specific genders.

Claims

1. A traction motor, characterized in that: include: A housing (1) on which a port box (11) is disposed, and a group of copper bars (12) extend from the housing (1) into the port box (11); A group of cables (2), one end of each cable (2) being connected to one of the copper bars (12), and the other end of each cable (2) extending out of the port box (11) and then bent and extended away from the extending direction; A set of fixing components (3) is arranged on the housing (1) and fixes the bent cable (2) and separates the cable (2) from the outer wall of the housing (1).

2. The traction motor according to claim 1, characterized in that: The fixing assembly (3) comprises: A support plate (31) fixed on the housing (1); A clamping plate assembly (32) comprises a bottom plate and a top plate connected to each other, fixed on the support plate (31), and three inclined holes are formed between the top plate and the bottom plate, and the hole walls of the three inclined holes press the cable (2) and make the cable (2) extend obliquely downward.

3. The traction motor according to claim 2, characterized in that: The fixing assembly (3) further comprises: A pad (33) is fixed on the support plate (31) and is located on a side of the support plate (31) close to the port box (11) relative to the clamping plate assembly (32); and a plurality of wing strips (331) are formed at intervals on both sides of the pad (33) so that a group of cables (2) can be bolted to the pad (33) respectively by means of binding straps.

4. The traction motor according to claim 2, characterized in that: The middle portion of the support plate (31) is bent into a groove (311), and a bent edge (312) is formed on a side away from the port box (11); the bottom of the groove (311) is fastened to the housing (1) by bolts, and the bent edge (312) is fixed to the other side of the housing (1) by another bolt; and one end of the support plate (31) close to the port box (11) is suspended in the air.

5. The traction motor according to claim 1, characterized in that: The port box (11) is also provided with: Three insulators (111), one insulator (111) is connected to a screw protruding from the housing (1), one of the copper bars (12) and a wire nose (21) are connected to the other end of the insulator (111) via another screw, and the other end of the wire nose (21) is crimped together with the conductor of the cable (2).

6. The traction motor according to claim 1, characterized in that: The port box (11) is also provided with three sets of fastening components (4) for a group of cables (2) to pass through and be fixed; the front end of the cable (2) is exposed from the shielding layer, and the fastening components (4) include: A set of inner fastening rings (451) and outer fastening rings (452), after the cable (2) passes through the inner hole of the inner fastening ring (451), the shielding layer of the cable (2) is pressed on the outer wall of the inner fastening ring (451), and the outer fastening ring (452) is sleeved on the outer side of the inner fastening ring (451) and presses the shielding layer of the cable (2); wherein the outer part of the inner fastening ring (451) and the inner part of the outer fastening ring (452) are both conical; A sleeve (41) is provided with a first external threaded portion (411), an external limiting ring (412) and a second external threaded portion (413); the sleeve is connected to the side wall of the port box (11) via the first external threaded portion (411); the external limiting ring (412) abuts against the outer wall of the port box (11); and an annular step (414) is formed inside the sleeve (41); the inner fastening ring (451) abuts against the annular step (414); a rubber sleeve (43) comprising a small diameter section (431) and a large diameter section (432), wherein the small diameter section (431) extends into the sleeve (41) and abuts against the end surface of the outer fastening ring (452); A nut (42) is threadedly connected to the second external threaded portion (413), and an inner limit ring (421) is formed at the rear end thereof. When the nut (42) is tightened, the large diameter section (432) of the rubber sleeve (43) is pressed against the rubber sleeve (43), and the cable (2) is clamped by the rubber sleeve (43), and the outer fastening ring (452) is compressed to complete the connection.

7. The traction motor according to claim 6, characterized in that: The fastening assembly (4) further comprises an O-type sealing ring (44), wherein the O-type sealing ring (44) is arranged between the first external threaded portion (411) of the sleeve (41) and the external limiting ring (412).

8. The traction motor according to claim 1, characterized in that: The bending angle of the cable (2) is 90 degrees.

9. The traction motor according to claim 1, characterized in that: The cable (2) is a shielded cable and comprises, from the inside to the outside, a conductor, an insulating layer, a shielding layer and a sheath layer.

10. A locomotive, characterized in that The traction motor comprises the traction motor according to any one of claims 1 to 9.

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