CN218183109U

CN218183109U - Traction motor

Info

Publication number: CN218183109U
Application number: CN202222735336.5U
Authority: CN
Inventors: 乔长帅; 崔斯柳; 王成; 侯世旭; 钟博; 闫涛涛; 鲍泉; 唐子谋; 唐赢武; 卞苗苗; 刘雄建
Original assignee: CRRC Zhuzhou Electric Co Ltd
Current assignee: CRRC Zhuzhou Electric Co Ltd
Priority date: 2022-10-17
Filing date: 2022-10-17
Publication date: 2022-12-30
Anticipated expiration: 2032-10-17
Also published as: WO2024082444A1

Abstract

The application discloses a traction motor, which comprises a stator lead and a conducting ring; the stator lead wire is provided with a coil nose part, a first lead wire and a second lead wire; the coil nose part protrudes from the edge to the center, a first lead head of the first lead penetrates through the center of the coil nose part and is led out outwards, and a second lead head of the second lead penetrates through the edge of the coil nose part and is led out outwards; the first lead head located outside the coil nose portion directly extends, the second lead head located outside the coil nose portion bends towards the first lead head and closes, and the plurality of ring bodies of the conducting ring are arranged on the periphery sides of the closed first lead head and the closed second lead head. This traction motor reduces the degree of buckling of first, two lead heads through the relative position relation of adjustment first lead head, second lead head and coil nose three, reduces the damaged risk of lead wire insulation and reserves the sufficient space that can supply the conducting ring installation around the coil nose, improves the compact structure nature and the stability of a plurality of spare parts, is suitable for compact structure's motor.

Description

Traction motor

Technical Field

The application relates to the field of motors, in particular to a traction motor.

Background

With the high-speed development of rail transit, the traction motor voltage grade is more and more. Low voltage, high current motors are produced.

The existing motor coil is mostly wound by a single wire, and the current which can pass through the motor coil is limited. Although the motor coil of a part of large-current motor is wound by two wires, the problem of low current density can be solved, the thickness and rigidity of the coil lead at the joint of the coil lead are increased, and the problems of insulation damage, copper exposure and the like of the lead joint easily occur in the connection process of the joint structure. In addition, the parallel head structure of the coil lead has complex shape and large occupied space, which is not beneficial to the compact installation of the motor.

SUMMERY OF THE UTILITY MODEL

The application aims at providing a traction motor, which can improve the merging head structure of a stator lead wire and improve the structure quality and the assembly characteristic of the merging head structure.

To achieve the above objects, the present application provides a traction motor including a stator lead and a conductive ring; the stator lead wire is provided with a coil nose part, a first lead wire and a second lead wire; the coil nose part protrudes from the edge to the center, a first lead head of the first lead penetrates through the center of the coil nose part and is led out outwards, and a second lead head of the second lead penetrates through the edge of the coil nose part and is led out outwards; the first lead head located outside the coil nose portion directly extends, the second lead head located outside the coil nose portion bends towards the first lead head and closes, and the plurality of ring bodies of the conducting ring are arranged on the periphery of the closed first lead head and the closed second lead head.

In some embodiments, all rings of the same conductive ring include a U-ring, a V-ring, a W-ring, and a neutral ring; all rings of the same conducting ring are grouped in pairs and are respectively arranged on two opposite sides of the closed first lead head and the closed second lead head.

In some embodiments, the first lead tip is offset with respect to a central axis of the coil nose in a direction away from the second lead tip; two ring bodies of the same conducting ring are adjacent to the first lead head and arranged in parallel along the axial direction of the coil nose part, and the other two ring bodies are adjacent to the second lead head and arranged in parallel along the radial direction of the coil nose part.

In some embodiments, any of the stator leads further comprises a winding and binding part for realizing the integral binding of the first lead head, the second lead head and the conductive ring.

In some embodiments, a junction box is also included; the stator lead comprises a first lead section and a second lead section; first lead wire section is all located to coil nose portion, first lead wire head and second lead wire head three, and the second lead wire section includes the copper bar of being connected with the terminal box.

In some embodiments, the copper bar is provided with at least two mounting holes and a first fastener penetrating through the mounting holes and screwed to the junction box.

In some embodiments, the junction box is embodied as a non-magnetic steel junction box having an L-shaped cavity; the copper bar is arranged at the corner of the L-shaped cavity and is bent along the corner.

In some embodiments, a cable connected to the copper bar; the junction box comprises clamping plates distributed in pairs, base plates distributed in pairs and arranged between the clamping plates, a junction box bracket arranged between the base plates and a second fastener used for locking the clamping plates; any clamping plate is provided with an open slot for lateral embedding of the cable, and the openings of the open slots of the pair of clamping plates are opposite and face the base plate.

In some embodiments, the open slot is embodied as a U-shaped slot; the second fasteners are countersunk head threaded pieces arranged between any clamping plate and the base plate, and the countersunk head threaded pieces arranged on the two clamping plates are distributed in a staggered manner.

In some embodiments, the cable further comprises a connecting terminal arranged between the copper bar and the cable; the wiring terminal is sleeved with a cable and connected with the copper bar; the wiring terminal is provided with a step surface clamped with the wiring box; the wiring terminals arranged on the cables are distributed in pairs in an opposite manner.

Against the above background, the present application provides a traction motor comprising a stator lead and a conducting ring; the stator lead wire is provided with a coil nose part, a first lead wire and a second lead wire; the coil nose part protrudes from the edge to the center, a first lead head of the first lead penetrates through the center of the coil nose part and is led out outwards, and a second lead head of the second lead penetrates through the edge of the coil nose part and is led out outwards; the first lead head located outside the coil nose portion directly extends, the second lead head located outside the coil nose portion bends towards the first lead head and closes, and the plurality of ring bodies of the conducting ring are arranged on the periphery of the closed first lead head and the closed second lead head.

The utility model provides a traction motor makes first lead wire head draw forth and make the second lead wire head draw forth from the edge of coil nose portion from the center of coil nose portion, and in the in-process of first lead wire and second lead wire closing together in order to form and head structure, the second lead wire head is buckled towards first lead wire head and is drawn close and first lead wire head is not buckled, can reduce the degree of buckling of first lead wire head and second lead wire head, reduces the insulating damaged risk of lead wire. The first lead and the second lead are connected in parallel, a space for installing the conducting ring can be reserved around the middle of the coil nose, the first lead and the second lead are orderly enclosed by all ring bodies of the conducting ring, the space where the coil nose is located is fully utilized, the structural compactness and the stability of a plurality of parts are improved, and the coil nose is suitable for a motor with a compact structure.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a partial schematic view of a traction motor at a first lead, a second lead, and a conductive ring according to an embodiment of the present disclosure;

FIG. 2 is a schematic partial structure diagram of a traction motor at a copper bar and a junction box according to an embodiment of the present application;

FIG. 3 is a schematic view of a partial structure of a traction motor at a cable and junction box according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of an assembly of a cleat, a shim plate, a second fastener and a cable provided by an embodiment of the present application;

FIG. 5 is a front view of FIG. 4;

fig. 6 is a schematic view of an assembly of a cable and a terminal provided in an embodiment of the present application.

The coil comprises a conductive ring 1, a conductive ring 11, a U ring 12, a V ring 13, a W ring 14, a neutral ring 14, a coil nose 21, a first lead 22, a first lead 221, a first lead head 23, a second lead 231, a second lead head 232, a copper bar 2321, a mounting hole 3, a winding and binding part 4, a junction box 41, a clamping plate 411, an open slot 42, a base plate 42, a second fastener 43, a junction box support 44, a cable 5 and a connecting terminal 6.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In order to better understand the technical scheme of the present application, the following detailed description is provided for the person skilled in the art with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 6, fig. 1 is a partial schematic structural diagram of a traction motor at a first lead, a second lead and a conductive ring according to an embodiment of the present disclosure; FIG. 2 is a schematic partial structure diagram of a traction motor at a copper bar and a junction box according to an embodiment of the present application; FIG. 3 is a schematic view of a partial structure of a traction motor at a cable and junction box according to an embodiment of the present disclosure; FIG. 4 is a schematic view of an assembly of a cleat, a shim plate, a second fastener and a cable provided by an embodiment of the present application; FIG. 5 is a front view of FIG. 4; fig. 6 is a schematic view of an assembly of a cable and a terminal provided in an embodiment of the present application.

Referring to fig. 1, the present application provides a traction motor including a stator lead and a conductive ring 1; in the traction motor, the stator lead includes a coil nose portion 21, a first lead 22, and a second lead 23, the coil nose portion 21 is protruded from an edge toward a center, the first lead 22 has a first lead head 221, the first lead head 221 is inserted along the center of the coil nose portion 21 and is drawn out, the second lead 23 has a second lead head 231, and the second lead head 231 of the second lead 23 is inserted along the edge of the coil nose portion 21 and is drawn out.

In this embodiment, the first lead 221 and the second lead 231 are both led out from the inside of the coil nose portion 21 to the outside of the coil nose portion 21, and it can be seen that a part of the first lead 221 is located inside the coil nose portion 21, a part of the first lead 221 is located outside the coil nose portion 21, a part of the second lead 231 is located inside the coil nose portion 21, and a part of the second lead 231 is located outside the coil nose portion 21. The first lead 221 located outside the coil nose 21 extends straight, the second lead 231 located outside the coil nose 21 bends toward the first lead 221 and closes, the conductive ring 1 has a plurality of ring bodies, and all the ring bodies of the conductive ring 1 are disposed on the periphery of the closed first lead 221 and second lead 231.

The traction motor optimizes the relative position relationship among the first lead head 221, the second lead head 231 and the coil nose part 21, and enables the first lead head 221 and the second lead head 231 to be close to the middle part of the coil nose part 21, so that the bending degree of the first lead head 221 and the second lead head 231 can be reduced, specifically, the second lead head 231 is only bent towards the first lead head 221 to be close without bending the first lead head 221, thereby being beneficial to ensuring the structural strength of the lead heads, particularly the first lead head 221, and reducing the extrusion on the coil nose part 21; secondly, a space for installing the conductive ring 1 can be left around the middle part of the coil nose part 21, so that all ring bodies of the conductive ring 1 orderly enclose the first lead 221 and the second lead 231. Compared with the structure of the end part of a common stator lead, the traction motor provided by the application reduces the risk of lead insulation damage by reducing the bending degree of the first and second lead heads, and improves the structural compactness and stability of a plurality of parts by reasonably distributing the first and second lead heads and the conducting ring 1 to fully utilize the space of the coil nose part 21, thereby being suitable for the motor with a compact structure.

The traction motor provided in the present application will be further described with reference to the accompanying drawings and embodiments.

In some embodiments, as shown in fig. 1, all of the rings of the conductive ring 1 may include a U-ring 11, a V-ring 12, a W-ring 13, and a neutral ring 14; the U-ring 11, the V-ring 12, and the W-ring 13 correspond to three phases of the motor, respectively. When the conducting ring 1 and the stator lead are assembled, the U ring 11, the V ring 12, the W ring 13 and the neutral ring 14 of the conducting ring 1 are grouped in pairs and are respectively arranged on two opposite sides of the closed first lead head 221 and the closed second lead head 231, for example, the U ring 11 and the V ring 12 of the conducting ring 1 are in the same group, the W ring 13 and the neutral ring 14 of the conducting ring 1 are in the same group, the U ring 11 and the V ring 12 are located on the same sides of the closed first lead head and the closed second lead head, the W ring 13 and the neutral ring 14 are located on the same sides of the closed first lead head and the closed second lead head, and the U ring 11 and the W ring 13 are respectively located on opposite sides of the closed first lead head and the closed second lead head.

As can be seen from the above description, in the traction motor, a part of the first lead head 221 and a part of the second lead head 231 protrude out of the coil nose 21 and converge at the middle of the coil nose 21, and the middle of the coil nose 21 protrudes relative to the edge of the coil nose 21, so that the edge of the coil nose 21 has a larger space, and the U-ring 11, the V-ring 12, the W-ring 13, and the neutral ring 14 can be positioned and installed reasonably and effectively.

In general, the first lead 221 is led out from the middle of the coil nose 21 but slightly deviated from the central axis of the coil nose 21, for example, the first lead 221 is biased away from the second lead 231, as shown in fig. 1, the coil nose 21 is divided into three parts, i.e., upper, middle and lower, according to the distribution positions of the first and second leads in the coil nose 21, the second lead 231 is led out from the upper part of the coil nose 21 and bent toward the middle of the coil nose 21, and the first lead 221 is led out straight from the middle of the coil nose 21, wherein the first lead 221 is located at a position lower than the middle of the coil nose 21. Based on the foregoing distribution characteristics of the first and second lead heads relative to the coil nose portion 21, the upper portion of the coil nose portion 21 has a larger space than the lower portion of the coil nose portion 21, and of course, the upper portion of the coil nose portion 21 has a relatively smaller space in the axial direction and a relatively larger space in the radial direction, as limited by the bending tendency of the second lead head 231, so that two ring bodies of the conductive ring 1 can be juxtaposed in the radial direction on the upper portion of the coil nose portion 21; as for the lower part of the coil nose 21, since the first lead 221 extends straight, although the radial space is small, the axial space is large, and the two other ring bodies of the conductive ring 1 can be arranged in parallel in the axial direction at the lower part of the coil nose 21, and meanwhile, the first lead 221 is not bent, and the pressing with the coil nose 21 can be reduced.

In short, for the same conductive ring 1, two ring bodies are adjacent to the first lead head 221 and are arranged in parallel along the axial direction of the coil nose portion 21, and the other two ring bodies are adjacent to the second lead head 231 and are arranged in parallel along the radial direction of the coil nose portion 21, so that the radial space and the axial space of the stator lead can be utilized to the maximum extent, the insulation damage of the lead is avoided, and the application effect of the stator lead in a compact motor is improved.

In the traction motor provided by the present application, the stator lead may further include a winding and binding portion 3 for binding the first lead head 221, the second lead head 231, and the conductive ring 1, which can be referred to fig. 1. When all the ring bodies of the first lead head 221, the second lead head 231 and the conductive ring 1 are closed up according to the above recorded relative position relationship, the winding portion 3 can be adopted to wind and bind all the ring bodies of the first lead head 221, the second lead head 231 and the conductive ring 1, so that all the ring bodies of the first lead head 221, the second lead head 231 and the conductive ring 1 form a stable and uniform whole, and the vibration resistance and the environmental adaptability are improved. Of course, according to the specific shapes and sizes of the first lead head 221, the second lead head 231 and the conductive ring 1, some parts may be individually bound and then all parts may be bound.

Referring to fig. 1-2, in some embodiments, the traction motor provided herein further includes a junction box 4; in the traction motor, the stator lead comprises a first lead section and a second lead section which are distributed along the length direction of the stator lead, for example, the stator lead is divided into two parts along the length direction of the stator lead, wherein one part of the stator lead is the first lead section, and the other part of the stator lead is the second lead section; the aforementioned first lead segment is provided with the coil nose 21, the first lead head 221 and the second lead head 231, and it can be seen that the first lead segment is used for assembling with the conductive ring 1; the aforementioned second lead section is used for connection to the terminal block 4. Generally, the second lead segment can be connected to the junction box 4 through the copper bar 232, for example, the first lead 22 and the second lead 23 of the second lead segment are directly processed by the copper bar 232, no lead joint needs to be additionally welded on the first lead 22 and the second lead 23 of the second lead segment, and the space of the junction box 4 can be fully utilized.

On the basis of the above embodiment, in order to improve the connection reliability of the second lead segment and the junction box 4, the copper bar 232 is provided with at least two mounting holes 2321 and first fasteners respectively penetrating through the mounting holes 2321, and the first fasteners arranged in the mounting holes 2321 are used for locking the copper bar 232 and the junction box 4.

In some embodiments, the junction box 4 adopted in the present application is specifically a non-magnetic steel junction box 4, and the inside of the non-magnetic steel junction box 4 has an L-shaped cavity, and when the copper bar 232 and the non-magnetic steel junction box 4 are assembled, the copper bar 232 may be disposed at a corner of the L-shaped cavity and bent along the corner, as shown in fig. 2. The motor can avoid the eddy current effect generated by large current and improve the operation performance of the motor.

Referring to fig. 3 to 6, in some embodiments, the traction motor provided by the present application further includes a cable 5 connected to the copper bar 232, and in order to facilitate effective positioning of the cable 5, the terminal box 4 may include clamping plates 41 distributed in pairs, base plates 42 distributed in pairs and disposed between the clamping plates 41, a terminal box bracket 44 disposed between the base plates 42, and a second fastening member 43 for fastening the clamping plates 41; wherein, any one of the clamping plates 41 is provided with an open slot 411, and the openings of the open slots 411 of the pair of clamping plates 41 are opposite and face the base plate 42. When the cable 5 and the junction box 4 are assembled, firstly, the cable 5 is embedded into the open slot 411 of any one clamping plate 41 along the guide radial direction, so that the cable 5 is laterally embedded into the open slot 411; then, two backing plates 42 and two clamping plates 41 are sequentially attached to two opposite sides of the junction box bracket 44 from inside to outside, at this time, the two backing plates 42 are respectively attached to two opposite sides of the junction box bracket 44, and the two clamping plates 41 are respectively attached to two opposite sides of the two backing plates 42, and at the same time, the two clamping plates 41 can be locked and fixed by adopting a fastener, so that the two backing plates 42 and the junction box bracket 44 which are positioned in the two clamping plates 41 are firmly clamped, thereby clamping the cable 5. In general, one clamping plate 41 may be provided with a plurality of open grooves 411 for respectively clamping a plurality of cables 5, for example, one clamping plate 41 may be provided with three open grooves 411, and six open grooves 411 of two clamping plates 41 may be used for respectively clamping six cables 5. In this embodiment, the pair of clamping plates 41 have the same structure, and the opening slots 411 formed in the clamping plates 41 can be suitable for cables 5 with different shapes and sizes, so that the clamping type of the cables 5 can be reduced, and the mold opening cost can be reduced.

In the above embodiment, the opening slot 411 may be specifically configured as a U-shaped slot; meanwhile, a countersunk screw is provided between the pad 42 and any one of the clamping plates 41. In this example, the countersunk screws are used to lock the pair of clamping plates 41, for example, the countersunk screws provided to one of the clamping plates 41 are inserted through and lock the backing plate 42 and the clamping plate 41, and a plurality of countersunk screws provided to the two clamping plates 41, respectively, may fix both the clamping plates 41 to the backing plate 42. Referring to fig. 5, the countersunk head screws provided on the two clamping plates 41 are staggered.

On the basis of the above embodiment, the traction motor further comprises a wiring terminal 6 arranged between the copper bar 232 and the cable 5; referring to fig. 6, the terminal 6 is sleeved on the end of the cable 5 and connected to the copper bar 232, the terminal 6 has a step surface clamped with the junction box, the current density requirement is met by controlling the local structure size of the terminal 6, the terminal 6 can smoothly pass through the screwing piece of the junction box 4 to connect the junction box 4, and the installation strength of the copper bar 232 and the cable 5 in the junction box 4 can be improved. Wherein, the connecting terminal 6 with the step surface can be formed by pressing a copper pipe with steps.

A plurality of cables 5 are arranged on one traction motor, as shown in fig. 6, six cables 5 are arranged in the traction motor, and the six cables 5 can be distributed in pairs and are closely adjacent to each other, so that the wiring space in the junction box is saved.

In conclusion, the traction motor provided by the application designs a new parallel structure for the first lead section of the stator lead, so that the damage of an insulating layer of the lead can be effectively avoided, and in addition, the conducting ring 1 and the parallel structure are integrally bound by the winding and binding part 3, so that the structural integration is realized, and the vibration resistance of the stator and the structural compactness of the motor are improved; the traction motor provided by the application divides the stator lead into a first lead section and a second lead section, and the structural forms of the first lead section and the second lead section are respectively designed according to different installation requirements of two ends of the stator lead along the length direction, so that the installation is convenient, and the connection is reliable; the junction box 4 connected with the second lead section is made of non-magnetic steel, so that the eddy current effect is reduced, and meanwhile, the cable 5 is locked by the junction box 4 through the clamping plate 41 and the backing plate 42, so that the operation is easy and the cost is reduced.

The traction motor provided by the present application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims

1. A traction motor, characterized by comprising stator leads and a conducting ring (1); the stator lead wire has a coil nose (21), a first lead wire (22) and a second lead wire (23); the coil nose part (21) protrudes from the edge to the center, a first lead head (221) of the first lead (22) penetrates along the center of the coil nose part (21) and is led out outwards, and a second lead head (231) of the second lead (23) penetrates along the edge of the coil nose part (21) and is led out outwards; be located outside coil nose portion (21) first lead (221) directly extends, is located outside coil nose portion (21) second lead (231) court first lead (221) buckle and close together, a plurality of ring bodies of conductive ring (1) are located and are closed together first lead (221) with the week side of second lead (231).

2. Traction motor according to claim 1, characterized in that all the rings of the same conductive ring (1) comprise a U-ring (11), a V-ring (12), a W-ring (13) and a neutral ring (14); all the ring bodies of the same conductive ring (1) are grouped in pairs and are respectively arranged at two opposite sides of the first lead head (221) and the second lead head (231) which are closed together.

3. The traction motor according to claim 2, wherein the first lead head (221) is offset with respect to a central axis of the coil nose portion (21) in a direction away from the second lead head (231); two of the ring bodies of the same conductive ring (1) are adjacent to the first lead head (221) and are arranged in parallel along the axial direction of the coil nose part (21), and the other two ring bodies are adjacent to the second lead head (231) and are arranged in parallel along the radial direction of the coil nose part (21).

4. The traction motor according to claim 1, wherein any of the stator leads further comprises a winding portion (3) for achieving integral binding of the first lead head (221), the second lead head (231), and the conductive ring (1).

5. Traction motor according to any of claims 1 to 4, characterized by further comprising a junction box (4); the stator lead includes a first lead segment and a second lead segment; the coil nose part (21), the first lead head (221) and the second lead head (231) are all arranged on the first lead section, and the second lead section comprises a copper bar (232) connected with the junction box (4).

6. The traction motor according to claim 5, wherein the copper bar (232) is provided with at least two mounting holes (2321) and a first fastener penetrating the mounting holes (2321) and screwed to the junction box (4).

7. Traction motor according to claim 5, characterized in that said junction box (4) is in particular a non-magnetic steel junction box with L-shaped cavities; the copper bar (232) is arranged at the corner of the L-shaped cavity and is bent along the corner.

8. The traction motor according to claim 5, further comprising a cable (5) connected to the copper bar (232); the junction box (4) comprises clamping plates (41) distributed in pairs, backing plates (42) distributed in pairs and arranged between the clamping plates (41), a junction box bracket (44) arranged between the backing plates (42) and a second fastening piece (43) used for locking the clamping plates (41); any one of the clamping plates (41) is provided with an open slot (411) for the lateral embedding of the cable (5), and the openings of the open slots (411) of the pair of clamping plates (41) face to each other and face to the base plate (42).

9. A traction motor according to claim 8, wherein the open slot (411) is in particular a U-shaped slot; the second fastening pieces (43) are countersunk head threaded pieces arranged between any one of the clamping plates (41) and the backing plate (42), and the countersunk head threaded pieces arranged on the two clamping plates (41) are distributed in a staggered manner.

10. The traction motor according to claim 8, further comprising a terminal (6) provided between the copper bar (232) and the cable (5); the wiring terminal (6) is sleeved on the cable (5) and is connected with the copper bar (232); the wiring terminal (6) is provided with a step surface clamped with the junction box (4); the wiring terminals (6) arranged on the cables (5) are distributed in pairs in an opposite way.