Novel rotor outgoing cable binding and fixing structure

Abstract

The utility model discloses a novel rotor outgoing cable binding and fixing structure, which comprises an outgoing cable, a wire clamp and a rotor coil, the wire clamp comprises a cable chuck and a wire clamp groove, the wire clamp is arranged at two ends of a magnet yoke, the diameter of the wire clamp is smaller than that of a lead joint of the rotor coil, and the cable chuck clamps the outgoing cable. The outgoing cable is bound and fixed at the position of the wire clamp groove in a multi-layer manner by using an orientation belt, and the outgoing cable is limited by the wire clamp groove at the same time; the outgoing cable penetrates through a center hole of the rotating shaft to be connected with the collecting ring, and filler is arranged in the center hole and limits displacement of the outgoing cable in the center hole. The utility model is suitable for a motor with high rotating speed, especially a motor capable of rotating in two directions, and can effectively prevent the welding part of the rotor coil lead and the connecting cable from loosening.

Description

Technical Field

[0001] The utility model relates to a binding and fixing structure for a rotor lead-out cable in the field of motor production. Background Art

[0002] For the lead-out cable 1 between the rotor coil and the slip ring of the existing high-speed synchronous motor and the lead joint 21 of the rotor coil 2, the silver soldering and then insulation wrapping method is usually adopted. Among them, the lead-out cable 1 passes through the central hole of the rotating shaft. After the lead joint 21 of the rotor coil 2 is welded to the lead-out cable 1 and insulated, it is fixed by a bakelite wire clamp 3, as Figures 1 to 3 shown. The structure of the bakelite wire clamp is as Figure 4 shown. After the lead joint 21 of the rotor coil 2 is welded to the copper core of the cable and polished, the connection part is wrapped with multiple layers of insulating material 4, and finally a layer of alkali-free glass ribbon is half-lapped outside to enhance the connection reliability. Before the lead-out cable 1 enters the central hole of the rotating shaft along the end of the yoke, it is clamped by the bakelite wire clamp 3, which can also play a certain role in restricting the relative displacement between the lead-out cable 1 and the lead joint 21. A pipe joint is installed at the other end of the lead-out cable 1 and fixed to the brush rod through a nut and washer.

[0003] The above installation form of the lead-out cable 1 and the rotor coil 2 has the following problems. When the connection cable between the rotor coil 2 and the slip ring passes through the central hole of the rotating shaft, in order to smoothly insert the cable without damaging the cable insulation layer, there will be a certain gap between the central hole and the lead-out cable 1. When the rotor rotates, the cable will be pulled outward in the radial direction due to the centrifugal force. Since the diameter of the joint is relatively large, the pulling force generated by the centrifugal force is also large, and loosening or even breaking often occurs. Seriously, the rotor coil 2 and the lead-out cable 1 will be disconnected, resulting in mechanical failure and directly damaging the motor. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a new binding and fixing structure for the rotor lead-out cable, which is applicable to high-speed motors, especially motors that can rotate bidirectionally, and can effectively prevent the loosening of the welded part between the rotor coil lead and the connection cable.

[0005] A technical solution to achieve the above purpose is: a new binding and fixing structure for the rotor lead-out cable, including a lead-out cable, a wire clamp and a rotor coil;

[0006] The clamp includes a cable chuck and a clamp groove. The clamp is arranged at the positions on both ends of the yoke where the diameter is smaller than the lead joint of the rotor coil. The cable chuck clamps the outgoing cable. The outgoing cable is multi-layered and tied with a directional tape and fixed at the position of the clamp groove. The clamp groove also limits the outgoing cable. The outgoing cable passes through the central hole of the rotating shaft and is connected to the slip ring. There is a filler in the central hole, and the filler restricts the displacement of the outgoing cable in the central hole.

[0007] Furthermore, connection holes are provided on both sides of the cable chuck and on one side of the clamp groove. The clamp is fixed on the yoke by fasteners passing through the connection holes.

[0008] Furthermore, the clamp groove includes a limiting groove facing one side of the yoke and a binding groove facing the opposite side. The limiting groove is buckled on the surface of the yoke to limit the directional tape. The outgoing cable is tied in the limiting groove and the binding groove by a binding tape.

[0009] Furthermore, the depth of the limiting groove is greater than that of the binding groove.

[0010] Furthermore, the filler is polyester glass rope. After the cable passes through the central hole of the rotating shaft, the entire central hole of the rotating shaft is stuffed with polyester glass rope.

[0011] Furthermore, the surface of the polyester glass rope is impregnated with insulating paint.

[0012] A novel rotor outgoing cable binding and fixing structure of the utility model can effectively limit the relative displacement between the lead joint of the rotor coil and the cable lead, make the connection part safe and reliable, and enhance the electrical safety and mechanical structure safety of the rotor. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the connection between the outgoing cable 1 of an existing high-speed synchronous motor and the rotor coil;

[0014] Figure 2 It is Figure 1 A schematic structural diagram in the A direction;

[0015] Figure 3 It is Figure 1 A schematic structural diagram in the B direction;

[0016] Figure 4 It is a schematic structural diagram of a bakelite clamp;

[0017] Figure 5 It is a schematic structural diagram of a novel rotor outgoing cable binding and fixing structure of the utility model;

[0018] Figure 6 It is Figure 5 A schematic structural diagram in the A direction;

[0019] Figure 7 For Figure 5 Schematic diagram of the structure in the B direction;

[0020] Figure 8 Front view of the wire clamp of the present utility model;

[0021] Figure 9 Top view of the wire clamp of the present utility model. Specific embodiments

[0022] In order to better understand the technical solution of the present utility model, the following will be described in detail through specific embodiments:

[0023] Please refer to Figures 5 to 7 , a novel rotor lead-out cable binding and fixing structure of the present utility model includes a lead-out cable 1, a wire clamp 5 and a rotor coil 2.

[0024] Please refer to Figure 8 and Figure 9 . The wire clamp 5 includes a cable chuck 51 and a wire clamp groove 52. The wire clamp 5 is arranged at a position on both ends of the yoke where the diameter is smaller than the lead joint 21 of the rotor coil 2. After the lead-out cable 1 is silver-soldered, polished and insulated with the lead joint 21, the cable chuck 51 is used to clamp the lead-out cable 1, and the lead-out cable 1 is multi-layered and fixed at the wire clamp groove 52 part with a directional band 6. Since the wire clamp is located at a position on both ends of the yoke where the diameter is smaller than the joint, the binding here can provide a centripetal force to the connection part between the rotor coil joint and the cable, reducing the deformation influence caused by the centrifugal force.

[0025] Specifically, the cable chuck 51 is composed of two independent jigs. Connection holes are respectively opened on both sides of the cable chuck 51, and a connection hole is also opened on one side of the wire clamp groove 52. After the lead-out cable 1 passes through the clamping space in the two jigs of the cable chuck 51, the wire clamp 5 is fixed on the yoke through the fasteners passing through the connection holes, and at the same time, the two jigs are locked and fixed through the fasteners.

[0026] Specifically, the wire clamp groove 52 includes a limiting groove 521 facing the yoke side and a binding groove 522 facing the opposite side. The limiting groove 521 is buckled on the surface of the yoke to limit the directional band, and the lead-out cable 1 is bound in the limiting groove 521 and the binding groove 522 with a binding band.

[0027] More specifically, considering the volume of the binding band and the strength of the connection structure, the depth of the limiting groove is greater than the depth of the binding groove.

[0028] In this embodiment, the lead-out cable 1 passes through the central hole of the rotating shaft and is connected to the slip ring. A filler is arranged in the central hole to limit the displacement of the lead-out cable in the central hole.

[0029] Specifically, the filler is polyester glass rope 7. After the cable passes through the central hole of the rotating shaft, the entire central hole of the rotating shaft is tightly plugged with the polyester glass rope 7. The surface of the polyester glass rope 7 is impregnated with insulating paint. After the cable passes through the central hole of the rotating shaft, the polyester glass rope impregnated with insulating paint tightly plugs the entire central hole of the rotating shaft. After the rotor assembly is dried in the drying oven, the polyester glass rope in the central hole of the shaft is cured, which can play a role in restricting the movement of the cable.

[0030] The fixed manner of the lead cable of the present utility model is applicable to high-speed motors, especially motors that can rotate bidirectionally, and can effectively prevent loosening of the welded part between the lead wire of the rotor coil and the connecting cable.

[0031] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present utility model, rather than to limit the present utility model. As long as it is within the scope of the essential spirit of the present utility model, changes and modifications to the above-described embodiments will fall within the scope of the claims of the present utility model.

Claims

1. A novel rotor lead-out cable binding and fixing structure, comprising a lead-out cable, a wire clamp and a rotor coil, characterized in that: The wire clamp includes a cable clamp head and a wire clamp groove. The wire clamp is arranged at the positions of the lead connectors of the rotor coil at both ends of the yoke whose diameter is smaller than that of the rotor coil. The cable clamp head clamps the lead-out cable. The lead-out cable is bound with multiple layers of directional tape and fixed in the wire clamp groove position. The wire clamp groove also limits the lead-out cable. The lead-out cable passes through the center hole of the rotating shaft and is connected to the collector ring. A filler is arranged in the center hole. The filler limits the displacement of the lead-out cable in the center hole.

2. A novel rotor lead-out cable binding and fixing structure according to claim 1, characterized in that: Both sides of the cable clamp and one side of the wire clamp groove are provided with connection holes, and the wire clamp is fixed on the magnetic yoke by fasteners passing through the connection holes.

3. According to the novel rotor lead-out cable binding and fixing structure according to claim 1, it is characterized in that: The wire clamp groove includes a limiting groove facing one side of the yoke and a binding groove facing the opposite side. The limiting groove is buckled on the surface of the yoke to limit the directional belt. The lead-out cable is bound in the limiting groove and the binding groove through the binding belt.

4. A novel rotor lead-out cable binding and fixing structure according to claim 3, characterized in that: The depth of the limiting groove is greater than the binding groove.

5. According to the novel rotor lead-out cable binding and fixing structure as described in claim 1, it is characterized in that: The filler is polyester glass rope. After the cable is passed through the center hole of the rotating shaft, the center hole of the entire rotating shaft is tightly plugged with the polyester glass rope.

6. A novel rotor lead-out cable binding and fixing structure according to claim 5, characterized in that: The surface of the polyester-glass rope is impregnated with insulating varnish.

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