JPH05335153A - Transformer for vehicle - Google Patents

Abstract

PURPOSE:To obtain a transformer for vehicle mounting use lightened while the reliability of mounting is ensured by a method wherein the transformer is provided with a transformer tank made of a light metal and a support device, which has one end to support the transformer tank and the other end, which can be mounted to an electric car, and is made of a steel material for structure use. CONSTITUTION:A transformer for vehicle mounting use is provided with a transformer main body 13 having a transformer tank 12, which has a coil housed therein, has the rectangular section of the front and is made of a light alloy, such as an aluminium alloy, and a support device 15, which encircles the whole periphery of this main body 13, is formed into roughly a formwork form for supporting the main body 13 on a body floor 4, which is a plinth of an electric car, and is made of a steel material for structure use. The device 15 is provided with two rectangular frame members 16, which encircle the tank 12 and are made of a steel material for structure use, and one pair of transformer fitments 18, which are welded to the members 16 by a welding part to make the members 16 couple with each other and constitute an integral formwork. Thereby, a lightening of the transformer and the mechanical strength and reliability of the transformer can be maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted transformer, and more particularly to a vehicle-mounted transformer mounted under the floor of an electric vehicle. In this specification, a vehicle-mounted transformer is a transformer that is mounted under the floor of an electric vehicle, and is not only a transformer main body having a coil housed in a tank and wound around an iron core but also this transformer main body. Means a support device for supporting the vehicle on the floor of the vehicle.

[0002]

2. Description of the Related Art FIGS.
15A and 15B are a schematic front view and a schematic side view showing a conventional vehicle-mounted transformer disclosed in JP-A-15690, in which a vehicle-mounted transformer 1 contains a coil (not shown). Then, a transformer main body 3 having a steel tank 2 having a rectangular front cross section, and a frame-shaped steel body 3 for surrounding the entire circumference of the transformer main body 3 to support the transformer main body 3 on a vehicle body floor 4 And a supporting device 5. The support device 5 includes two rectangular frame members 7 welded to the tank 2 by the welded portions 6.
And a pair of transformer mounts 8 that are welded to the frame member 7 to connect the frame members 7 to each other to form an integrated frame. The frame member 7 is for reinforcing the transformer tank 2, is provided so as to wind the transformer tank 2, and is called winding reinforcement. The transformer mounting metal 8 is fixed to the lower surface of the vehicle underframe which is the vehicle body floor 4 with bolts 9, and the transformer main body 3 is connected to the vehicle underframe 4 via the frame member 7 and the transformer mounting metal 8.
Suspended from.

[0003]

In recent years, there has been an increasing need to reduce the weight of transformers mounted on electric vehicles in order to increase the speed of railways. As one means for reducing the weight of the transformer, it is considered that the material of the transformer tank is aluminum. The specific gravity of aluminum is about 1/3 that of iron, and it is easy to reduce the weight of the tank to about half that of steel tanks, even if the aluminum tank plate is slightly thicker to obtain the required strength. You can

However, according to the conventional supporting structure for the vehicle-mounted transformer 1 shown in FIGS. 11 and 12, the frame member 7 of the supporting device 5 must be welded to the transformer tank 2 by the welding portion 6. No, and the frame member 7 has a transformer mounting metal 8
Must be welded. Since aluminum and steel cannot be welded, if the transformer tank 2 is aluminum, the support device 5 must also be made of aluminum.
On the other hand, the mechanical strength of aluminum is about 1/3 to about 1 that of steel.
In order to mount the transformer body 3 on the vehicle underframe 4 with sufficient mounting strength, the plate thickness of the aluminum member constituting the supporting device 5 should be sufficiently large and reinforced to increase the number of supporting points. is necessary. Therefore, depending on the weight of the transformer and the number of supporting points, the total weight of the vehicle-mounted transformer 1 including the supporting device 5 is increased in order to secure the required strength, and the weight cannot be reduced. There are cases.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to obtain a vehicle-mounted transformer capable of achieving weight reduction and maintaining reliability of a supporting portion, and further weight reduction. It is also an object of the present invention to obtain a transformer mounted on a vehicle, which achieves the above-mentioned requirements, maintains reliability, and has excellent vibration and soundproof effects.

[0006]

According to a first aspect of the present invention, there is provided a vehicle mounted transformer having a transformer tank made of a light metal, one end supporting the transformer tank, and the other end mountable on an electric vehicle. And a supporting device made of structural steel.

A vehicle-mounted transformer according to a second aspect of the present invention is a transformer made of a light metal, and a structural steel support having one end for supporting the transformer tank and the other end that can be attached to an electric vehicle. A device and an electrical isolation device inserted between the transformer tank and the support device.

According to a third aspect of the present invention, there is provided a vehicle mounted transformer, which is a structural steel support having a light metal transformer tank and one end that supports the transformer tank and the other end that can be attached to an electric vehicle. And a vibration damping device inserted between the transformer tank and the supporting device.

A vehicle mounted transformer according to a fourth aspect of the present invention is a transformer made of a light metal, and a structural steel support having one end for supporting the transformer tank and the other end that can be attached to an electric vehicle. And an electrically insulating vibration isolation device inserted between the transformer tank and the support device.

A vehicle-mounted transformer according to a fifth aspect of the present invention is a transformer made of a light metal, and a structural steel support having one end for supporting the transformer tank and the other end that can be attached to an electric vehicle. A device, and an electrically insulating vibration isolator inserted between the transformer tank and the supporting device, wherein the vibration isolator comprises a vibration isolation rubber, a polymer plastic, and a multiaxial reinforced three-dimensional composite energy It is any anti-vibration material selected from the group of absorbent materials.

A vehicle mounted transformer according to a sixth aspect of the present invention is a structural steel support device having a transformer main body and one end for supporting the transformer main body and the other end that can be firmly attached to an electric vehicle. And an anti-vibration device for the multi-axially reinforced three-dimensional composite energy absorbing material inserted between the transformer body and the supporting device.

[0012]

According to the vehicle-mounted transformer of claim 1, the weight can be reduced by making the transformer tank light metal, and the supporting device for supporting the transformer tank is made of structural steel. The required mechanical strength and reliability can be maintained.

According to another aspect of the vehicle-mounted transformer of the present invention, the transformer tank and the supporting device are electrically insulated from each other to prevent galvanic corrosion between different metals.

According to the vehicle-mounted transformer of the third aspect, the vibration isolator can be inserted between the transformer tank and the support device to prevent the vibration of the transformer from being transmitted to the vehicle.

In the vehicle-mounted transformer according to the fourth aspect, the vibration isolator has an electrically insulating property and can prevent electrolytic corrosion and vibration.

According to a fifth aspect of the present invention, there is provided a vehicle-mounted transformer, wherein the anti-vibration device is an anti-vibration device selected from the group consisting of anti-vibration rubber, polymer plastic and multiaxial reinforced three-dimensional composite energy absorbing material. It is a vibration material.

According to a sixth aspect of the present invention, there is provided a vehicle-mounted transformer having a vibration isolator of a multi-axis reinforced three-dimensional composite energy absorbing material between a transformer body and a supporting device, which has a vibration and soundproof structure. Long life and high reliability.

[0018]

1 and 2 show a vehicle-mounted transformer 11 of the present invention in a schematic front view and a schematic side view, respectively.
The vehicle-mounted transformer 11 contains a coil (not shown) and has a transformer main body 13 having a transformer tank 12 made of a light alloy such as aluminum having a rectangular front section, and the entire transformer main body 13. A support device 15 made of a structural steel material having a substantially frame shape for surrounding the circumference and supporting the transformer main body 13 on the vehicle body floor 4 which is the underframe of the electric vehicle is provided.

The support device 15 comprises two rectangular frame members 16 made of structural steel surrounding the tank 12, and welded to the frame members 16 by welding portions 17 to connect the frame members 16 to each other to form an integral frame. And a pair of transformer mounts 18 for Transformer mounting gold 18 Structural steel, bolt 8
Is fixed to the lower surface of the vehicle underframe 4 which is the floor of the vehicle body, and the transformer main body 13 is suspended and supported from the vehicle underframe 4 via the frame member 16 and the transformer mounting metal 18.

Since the frame member 16 of the supporting device 15 is only in contact with the peripheral surface of the transformer tank 12, the side surface of the transformer tank 12 is prevented so that the transformer tank 12 does not slip out of the frame member 16. Is a clasp of light metal such as aluminum 19
Are fixed by the welded portion 20 so as to sandwich the pair of frame members 16. In order to prevent the transformer tank 12 from moving inside the frame member 16, the stopper plate 19 and the frame member 16 are connected by bolts 21. By increasing the width of the frame member 16, the contact area between the inner surface of the frame member 16 and the transformer tank 12 can be increased, and the aluminum transformer tank 12 is supported on a wide surface so that stress concentration does not occur. Is done.

As described above, the frame member 16 of the supporting device 15 constitutes one end for supporting the transformer tank 12, and the frame member 16
The transformer mounting metal 18 welded to the other end constitutes the other end that can be mounted on the electric vehicle. Thus, the transformer tank 1
By making 2 as a light metal such as aluminum, weight reduction can be achieved, and a supporting device 15 for supporting the transformer tank 12 is provided.
By using a structural steel material, the required mechanical strength, safety and reliability can be secured.

Between the transformer tank 12 and the frame member 16 of the supporting device 15, an electrical insulating device 20 as shown in FIGS. 3 to 5 is provided. In the examples shown in these figures, the insulating device 20 is a layer of glass epoxy material or zinc chromate coating applied to the inner surface of the frame member 16. With such an electrical insulation device 20, the transformer tank 12 is pierced due to galvanic corrosion between the aluminum transformer tank 12 and the frame member 16 of the steel support device 16 It is possible to prevent the risk that the cooling medium such as the insulating oil in 12 flows out.

A vehicle-mounted transformer 21 shown in FIGS. 6 to 8.
In this case, the supporting device 22 is provided with a substantially box-shaped frame member 23 having an opening for receiving the coil storage portion of the transformer tank 12 on the bottom plate of the box opened on one surface. Frame member 2
3 is for supporting the transformer tank 12 so as to wrap the ridge of the transformer tank 12 from both sides, and is firmly coupled to each other by a transformer mounting metal 24 for mounting to the vehicle body floor 4 with bolts 8. The reinforcing members 25 are also connected so as to maintain the positional relationship with each other.
According to this structure, in the aluminum transformer tank 12,
Since it is not necessary to provide the clasp 21 as shown in FIGS. 1 and 2 by welding, the manufacturing is easy and strong. Transformer tank 1
A vibration isolator 26 is provided between the frame 2 and the frame member 23 to prevent the vibration of the transformer body from being transmitted to the vehicle. The vibration isolator 26 is made up of a plurality of blocks made of a vibration isolation material selected from the group consisting of vibration isolation rubber, polymer plastic, and multiaxial reinforced three-dimensional composite energy absorbing material. It is glued. These anti-vibration materials can be used alone or in combination. Since these vibration damping materials are also electrically insulating materials, it is possible to prevent corrosion of the transformer tank 12 due to galvanic corrosion between different metals.

The multi-axis reinforced three-dimensional composite energy absorbing material which is the material of the vibration isolator 26 is described in Japanese Patent Application No. 3-317940 filed on Dec. 2, 1991,
A multi-axis reinforced three-dimensional molding base material for high energy absorption, which is a combination of linearly oriented filaments in a range of ± 15 ° to 60 ° with respect to an external load axis in a three-dimensional direction in the multi-axis direction. It is a composite material with excellent specific rigidity and specific strength that can be applied to a wide range of structural members.

9 and 10 show a vibration isolation support structure for use in the vibration isolation support of a transformer by utilizing the excellent properties of the multiaxially reinforced three-dimensional composite energy absorbing material. A groove-shaped mounting bracket 31 is fixed to the transformer body 30,
The mounting bracket 31 is received and supported in the groove of a substantially groove-shaped support bracket 33 mounted on the vehicle floor 32 (FIG. 9). A first block 34 of multiaxially reinforced three-dimensional composite energy absorbing material is provided on the lower surface between the mounting bracket 31 and the support bracket 33. A second block 35 of multiaxially reinforced three-dimensional composite energy absorbing material is further provided on the lower surface of the support bracket 33, and a washer 36 is provided on the lower surface of the block 35. Brackets 31 and 33 thus stacked and blocks 34 and 35 inserted between washers 36
The assembly of is connected by bolts 37. In such a structure, the multi-axis reinforced three-dimensional composite energy absorbing material is stronger against fatigue than vibration-proof rubber and so on, so it supports a large stress safely for a long period of time and has a vibration-proof function. Therefore, the vibration of the transformer body 30 can be absorbed and the quietness in the vehicle can be improved.

[0026]

According to the on-vehicle transformer of the present invention, the weight can be reduced by making the transformer tank light metal, and the supporting device for supporting the transformer tank is made of structural steel. The required mechanical strength and reliability can be maintained. Further, the transformer tank and the supporting device can be electrically insulated to prevent galvanic corrosion between different kinds of metals. Furthermore, a vibration isolation device can be inserted between the transformer tank and the support device to prevent the vibration of the transformer from being transmitted to the vehicle. Since it is at least one vibration damping material selected from the group of three-dimensional composite energy absorbing materials, it is electrically insulating and can prevent galvanic corrosion and vibration. The anti-vibration device of multi-axis reinforced three-dimensional composite energy absorbing material has a long life of the anti-vibration and soundproof structure and withstands high load and high reliability.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an embodiment of a vehicle-mounted transformer of the present invention.

FIG. 2 is a schematic side view of the vehicle-mounted transformer of FIG.

FIG. 3 is a partial schematic front view showing an insulating device between a supporting device of the vehicle-mounted transformer of FIG. 1 and a transformer tank.

4 is a partial schematic side view of the insulating device of FIG.

5 is a schematic perspective view of the insulating device of FIGS. 3 and 4. FIG.

FIG. 6 is a schematic front view showing another embodiment of the vehicle-mounted transformer of the present invention.

FIG. 7 is a schematic side view of the vehicle-mounted transformer of FIG.

8 is an exploded schematic perspective view of the vehicle-mounted transformer of FIGS. 6 and 7. FIG.

FIG. 9 is a partial perspective view showing an anti-vibration support structure for a vehicle-mounted transformer of the present invention.

FIG. 10 is a sectional view of the anti-vibration support structure of FIG.

FIG. 11 is a schematic front view of a conventional vehicle-mounted transformer.

FIG. 12 is a schematic side view of the vehicle-mounted transformer of FIG. 11.

[Explanation of symbols]

 12 transformer tank 15 support device 20 electrical insulation device 26 vibration isolation device

Claims (6)

[Claims] 1. A vehicle-mounted transformer comprising a light metal transformer tank and a structural steel support device having one end supporting the transformer tank and the other end mountable on an electric vehicle. 2. A transformer tank made of a light metal, a structural steel support device having one end supporting the transformer tank and the other end attachable to an electric vehicle, the transformer tank and the support device. An on-vehicle transformer with an electrical isolation device inserted between. 3. A transformer tank made of a light metal, a structural steel support device having one end supporting the transformer tank and the other end attachable to an electric vehicle, the transformer tank and the support device. A vehicle-mounted transformer having a vibration isolation device inserted between the two. 4. A transformer tank made of light metal, a structural steel support device having one end supporting the transformer tank and the other end mountable on an electric vehicle, the transformer tank and the support device. A transformer for mounting on a vehicle, which is provided with an electrically insulating vibration isolator inserted between the two. 5. A transformer tank made of light metal, a structural steel support device having one end supporting the transformer tank and the other end attachable to an electric vehicle, the transformer tank and the support device. And an electric insulating vibration isolator inserted between the vibration isolator and the vibration isolator, wherein the vibration isolator is at least one selected from the group consisting of anti-vibration rubber, polymer plastic, and multiaxial reinforced three-dimensional composite energy absorbing material. A vehicle-mounted transformer that is one of the anti-vibration materials. 6. A transformer main body, a structural steel support device having one end that supports the transformer main body and the other end that can be firmly attached to an electric vehicle, and the transformer main body and the support device. An on-vehicle transformer having a multi-axis reinforced three-dimensional composite energy-absorbing material vibration-damping device inserted between them.