JPH05219674A - Main motor for vehicle - Google Patents

Abstract

PURPOSE:To facilitate replacement of a bracket and to prevent damage to a lead at the time of replacing the bracket by fixing one side of a cleat to a stator coil axially protruding from a stator and fixing the other side of the cleat to a connector. CONSTITUTION:Both ends of a cleat 8 made of a soft steel rod formed in an inverted U shape are previously welded to a bind ring 3 inserted to the outer periphery of a stator coil 2. Then, the cleat 8 is fixed to an upper end of the coil 2 by a glass tape 12 so disposed inside a cable connector 16 on a lower part of a suction hole 6b formed on a bracket 6B. An upper part of the cleat 8 is fixed to a connector 16 by a glass tape 12. Thus, a bracket 6B can be solely replaced without removing the cleat 8 from the bracket 6B, and a force to be applied to a lead plate 13 can be supported by the cleat 8. Accordingly, deformation of a base of the plate 13 and a crack of a cover 13a can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle main motor.

[0002]

2. Description of the Related Art As is well known, in railways, which continue to increase in speed, weight reduction of vehicles is promoted in order to increase the speed, and as a part thereof, weight reduction of vehicle main motors is demanded.
In order to reduce the weight of this traction motor for vehicles, it is necessary to increase the number of revolutions, reduce the size of the iron core and coil by improving cooling, and change the shape and material of the structural part, such as the use of aluminum material. It is being advanced.

FIG. 6 is a sectional view showing an example of a conventional vehicle main motor, FIG. 7 is a partially enlarged view of the upper right portion of FIG. 6, and FIG. 8 is a sectional view taken along line CC of FIG. In FIGS. 6, 7 and 8, a dolly (not shown) is supported by a support fitting 11 shown by a chain double-dashed line whose upper end is fixed to the lower part of the vehicle body (not shown).
A pair of iron core retainers 9 and a backing plate 10 which are annular in a side view (not shown) of FIG.

Of these, inside the pair of iron core retainers 9,
The laminated stator cores 1 are inserted in advance and clamped, and the upper surface is welded to the contact plate 10. On the outer circumference of both ends of the stator coil 2 inserted in the inner circumferential groove of the stator core 1, a polyimide ring is formed into an annular shape with a round rod of mild steel, and then a polyimide ring is wrapped around the bind ring. 3 is fitted, and the binding ring 3 and the both ends of the stator coil 2 are tied with a tie string 12 of glass tape.
The binding ring 3, the stator coil 2 and the stator core 1 are vacuum-impregnated with epoxy resin.

On the outer surface of the left iron core retainer 9, the outer peripheral side surface of the bracket 6A made of cast aluminum alloy has an inverted L shape in the sectional view of FIG. The outer peripheral side of the bracket 6B made of cast aluminum alloy, which is also not shown in the side view, is also fixed to the outer surface of the right iron core retainer 9 with bolts 18. Of these, the bracket 6A has a ring-shaped bearing box 5A fixed to the through-hole formed in the center of the ring by bolts, and the bracket 6B also has a ring-shaped bearing box formed in the through-hole formed in the center of the ring. 5B
Are fixed with bolts. The king bearing 19A is inserted into the bearing box 5A from the outside, the roller bearing 19B is inserted in the bearing box 5B, and the rotary shaft 4 is inserted in these king bearing 5A and roller bearing 5B. The cage rotor 20 is inserted and fixed in advance.

On the other hand, a lead-in hole 6b into which the cable 7 for supplying electric power to the stator coil 2 is drawn is formed at the upper end of the bracket 6B, and the upper end surface of the lead-in hole 6b has a cover having an inverted U-shaped cross section. 15 are attached with bolts 18 as shown in FIG. On the upper surface of the cover 15, through holes through which the cables 7 pass are provided for three phases as shown in FIG. 8. The cables 7 pass through these through holes, and the cables 7 have a substantially convex shape. It is fixed to the cover 15 with a rubber bush 14. A compression terminal is fixed to the core wire of the cable 7 at the lower end of the cable 7, and the compression terminal projects upward from the right end of the stator coil 2 and has a base portion covered with a resin 13a at the upper end side surface of the lead plate 13. Are brazed over. A glass tape is wound around the outer peripheries of the cables 7 and the brazing portion of the lead-out plate 13, and an insulating varnish is further applied to the outer peripheries of the glass tape to form a cable connecting portion 16 indicated by a chain double-dashed line. is doing.

At the upper end of the bracket 6B, a cleat 28 made of a mild steel round bar bent in an inverted U-shape in a plan view (not shown in FIG. 6) is provided with nuts 17 projecting both ends in the axial direction from the outside of the upper end of the bracket 6B. The cleat 28 and the cable connecting portion 16 are fixed to each other by being wrapped with a tie strap 12 of glass tape and then coated with an insulating varnish.

In the vehicular main electric motor constructed as described above, the load of the rotor 20 is supported by the stator core 1 supported by the support fittings 11 via the brackets 6A and 6B, whereby the stator core is supported. 1 is also used as a structural member, and the brackets 6A and 6B are made of an aluminum alloy to reduce the weight. This bracket 6A, 6B
By reducing the weight of the vehicle, the traction motor for vehicles with the output of 300 kW and the weight of 420 kg using the iron bracket that was used up to now,
The weight is reduced by about 5%.

On the other hand, when a vehicle equipped with this vehicle main motor travels on a track, pebbles on the track may be rolled up and hit on the brackets 6A, 6B. It has been reported from the results of the running test that a minute crack may occur in the pebbles hit on the brackets 6A and 6B when the vehicle speed exceeds 200 km / hour. Then, at that time, in order to replace the bracket 6B, the nut 17 for fixing the cleat 28 to the bracket 6B and the bolt 18 for fixing the cover 15 as shown in FIG. 9 are removed, and as shown in FIG. , The cover 15 and the bracket 6B are pulled out upward from the cable 7 as shown by arrows D and E without disassembling the cable connecting portion 16, and a new bracket 6B is inserted and replaced.

[0010]

However, in the vehicular main electric motor configured as described above, when the cover 15 is removed together with the bush 14 as shown in FIG. 10, it is bent as shown in FIG. The cable 7 is stretched or is moved by the contact of the cover 15 and the bracket 6B, and a force is applied to the lead-out plate 13. Then, the resin 13a coated on the base portion of the output plate 13 is cracked, and moisture condensed on the surface due to temperature change caused by running and stopping of the vehicle may cause ground fault to the bracket 6B via the cleat 28. .. Further, the binding work between the cleat 28 and the connecting portion 16 using the glass tape, which is performed after the bracket 6B is replaced and the cleat 28 is fixed, must be performed by putting a finger into the pull-in hole 6b of the bracket 6B, which is difficult to do. ,take time.

Therefore, an object of the first, second and third inventions is to obtain a vehicle main electric motor in which the bracket can be easily replaced and the lead-out portion can be prevented from being damaged when the bracket is replaced.

[0012]

According to a first aspect of the invention, a cable attached to a stator penetrates through a bracket attached to a stator, and a cleat for supporting the connection portion has an internal cleat. In the vehicular main electric motor provided in the above, one side of the cleat is fixed to a stator coil protruding in the axial direction from the stator, and the other side of the cleat is fixed to the connecting portion.

A second invention is for a vehicle in which a cable attached to the stator through a connecting portion penetrates a bracket attached to the stator, and a cleat for supporting the connecting portion is provided inside the bracket. In the main electric motor, one side of the cleat of the reinforced plastic material is fixed to a stator coil protruding axially from the stator, and the other side of the cleat is fixed to a connecting portion.

According to a third aspect of the invention, a cable attached to the stator through a connecting portion penetrates a bracket attached to the stator, and the stator coil axially projects from the stator. A vehicle main electric motor in which a binding ring for fixing each other is inserted is characterized in that the binding ring is provided with a convex portion for fixing the connecting portion.

[0015]

The connecting portion is fixed to the side of the stator before mounting the bracket, and the bracket can be attached and detached without participating in the connecting portion.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle main motor of the first and second inventions will be described below with reference to the drawings. However, the same parts as those in FIG. 7, FIG. 8 and FIG. 1 is a partial detailed view of a main electric motor for a vehicle according to the present invention, which is a sectional view corresponding to FIG. 8 of the related art, and FIG. 2 is a sectional view taken along the line AA of FIG. 1 and corresponding to FIG. 9 of the related art. , Conventional
The mounting position of the cleat 8 is different.

In FIGS. 1 and 2, the binding ring 3 inserted into the outer periphery of the stator coil 2 has, as shown in FIG. 2, both ends of an inverted U-shaped cleat 8 made of a mild steel rod. The cleat 8 is welded in advance so that it is located below the lead-in hole 6b formed in the upper portion of the bracket 6B and inside the cable connecting portion 16, and the stator coil 2 is fixed by the glass tape 12 as in the conventional case. It is fixed to the upper end of the. Further, the upper portion of the cleat 8 is fixed to the cable connecting portion 16 with the glass tape 12 as in the conventional case.

In the vehicular main electric motor constructed as described above, when replacing the bracket 6B which is cracked by the pebbles of the struck track, the cleat 8 is removed from the bracket 6B like the conventional cleat 28 shown in FIG. The bracket 6B can be replaced independently without removing it. Moreover, since the cable connection portion 16 can be fixed in the cleat 8 and the force applied to the lead-out plate 13 can be supported by the cleat 8, the base portion of the lead-out plate 13 is prevented from being deformed, and the coating 13a is not cracked. Can be prevented.

Further, it is not necessary to disassemble the cleat 8 and the cable connecting portion 16, and the unwinding and winding of the varnished glass tape 12 between the cable connecting portion 16 and the cleat 8 at the time of exchanging the bracket 6B and the varnish application can be performed. Since it is not necessary, the time required to replace the bracket 6B can be shortened. Further, even at the time of assembling the vehicular main motor in the factory, the above-mentioned binding work by the glass tape 12 of the connecting portion 16 and the cleat 8 can be performed before the bracket 6B is attached, so that the workability is improved.

In the first and second inventions, the cleat 8 is welded to the bind ring 3 by way of example.
And the binding ring 40 of FIG. 4 showing a cross-section of FIG.
As shown in (3), the cable connecting portion 16 may be directly fixed by partially projecting to the outside to provide a third invention. further,
Although the bind ring 3 and the cleat 8 have been described with reference to the example made of a mild steel rod, they may be made of an insulating material such as FRP. In this case, even if the diameter is increased and the strength is increased, the weight can be reduced and the withstand voltage characteristics between the phase and the ground can be improved. Further, in the above-described embodiment, the bind ring 3 is explained as an example in which one is provided at each of the left and right ends of the stator coil 3, but only two are provided on the right side as shown in FIG. 5, and the cleat 8A is bent at the middle portion. You may weld to each bind ring. At this time, since the cleat 8A is firmly fixed, there is an advantage that the cable connecting portion 16 is further firmly fixed. Furthermore, the binding ring 40 shown in FIG. 4 may be configured with two convex portions and C-shaped portions to reduce the weight.

[0021]

As described above, according to the first and second aspects of the present invention, the cleat for supporting the connecting portion penetrates the bracket attached to the stator through which the cable connected to the stator passes through the connecting portion. In the vehicular main electric motor provided inside the bracket, one side of the cleat is fixed to the stator coil that projects in the axial direction from the stator, and the other side of the cleat is fixed to the connection part, so that the connection part of the bracket Since it is fixed to the stator side before mounting so that the bracket can be attached and detached without involving the connection part, it is easy to replace the bracket and prevent damage to the lead-out part when replacing the bracket. An electric motor can be obtained.

According to the third aspect of the invention, the cable attached to the stator through the connecting portion penetrates the bracket attached to the stator, and the stator coil axially protrudes from the stator. In a vehicle main motor in which a binding ring for fixing the child coils to each other is inserted, the connecting portion is fixed to the stator side before mounting the bracket by providing a convex portion for fixing the connecting portion on the bind ring. Since it can be attached and detached without being involved in the connection part,
It is possible to obtain the vehicular main electric motor in which the bracket can be easily replaced and the lead-out portion can be prevented from being damaged when the bracket is replaced.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional view showing an embodiment of a vehicle main motor of the first and second inventions.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a partial vertical cross-sectional view showing an embodiment of a vehicle main motor of the third invention.

4 is a sectional view taken along line BB of FIG.

FIG. 5 is a partial vertical cross-sectional view showing another embodiment of the vehicle main motor of the first and second inventions.

FIG. 6 is a vertical cross-sectional view showing an example of a conventional vehicle main motor.

FIG. 7 is a partially enlarged vertical sectional view showing a conventional vehicle main motor.

8 is a sectional view taken along line CC of FIG.

FIG. 9 is a partial vertical cross-sectional view showing the operation of a conventional vehicle main motor.

[Explanation of symbols]

1 ... Stator core, 2 ... Stator coil, 3 ... Bind ring, 4 ... Stator shaft, 5A, 5B ... Bearing box, 6A, 6B ...
Bracket, 7 ... Cable, 8 ... Cleat, 9 ... Iron core retainer.

Claims (3)

[Claims] 1. A bracket attached to a stator,
In a vehicular main electric motor in which a cable connected to the stator through a connecting portion penetrates and a cleat for supporting the connecting portion is provided inside the bracket, one side of the cleat is axially arranged from the stator. A main motor for a vehicle, characterized in that it is fixed to a stator coil protruding in the direction, and the other side of the cleat is fixed to the connecting portion. 2. The traction motor for a vehicle according to claim 1, wherein the cleat is made of a reinforced plastic material. 3. A bracket attached to the stator,
A vehicle main motor in which a cable connected to the stator through a connecting portion penetrates, and a binding ring for fixing the stator coils to each other is inserted in a stator coil protruding axially from the stator. A vehicular main electric motor, wherein the binding ring is provided with a convex portion for fixing the connecting portion.