CN103065767A

CN103065767A - Transformer

Info

Publication number: CN103065767A
Application number: CN2012105446912A
Authority: CN
Inventors: 瞿文军
Original assignee: Ningbo Zhongce Et Electronics Co Ltd
Current assignee: Ningbo Zhongce Et Electronics Co Ltd
Priority date: 2012-12-17
Filing date: 2012-12-17
Publication date: 2013-04-24
Anticipated expiration: 2032-12-17
Also published as: CN103065767B

Abstract

The invention discloses a transformer which comprises a casing (1). An open face (101) is arranged on the casing (1). The transformer further comprises a cover (2) which is connected with the casing (1) and can seal the open face (101). The cover (2) and the casing (1) are made of the same engineering plastics. The engineering plastics are polyethylene terephthalate (PET) plastics, and the cover (2) and the casing (1) are connected through ultrasonic welding. The transformer is good in sealing effect.

Description

Transformer

Technical field

The present invention relates to a kind of transformer.

Background technology

Present transformer generally comprises a skeleton, on skeleton, be wound with respectively primary coil and secondary coil, consist of the line bag, wrap online and weld respectively elementary lead-in wire and secondary lead, then wrap online the plug-in mounting silicon steel sheet, consist of transformer body, at last transformer body is put into the housing of being made by engineering plastics, engineering plastics have good thermal endurance, heat resisting temperature is more than 100 degrees centigrade, and in housing, pour into epoxy resin, and making this transformer body sealing, this transformer is because the material of epoxy resin and housing is different, thereby its coefficient of thermal expansion and contraction is different, under the impact of temperature, be easy to produce the slit between the epoxy resin after the curing and the housing, thereby make this transformer body sealing effectiveness relatively poor, can't reach the requirement of transformer water proof and dust proof, when especially using under mal-condition, the useful life of this transformer is shorter, has potential safety hazard.

Summary of the invention

Technical problem to be solved by this invention is that the transformer of good sealing effect is provided.

For solving the problems of the technologies described above, transformer provided by the invention, it comprises housing, and this housing has an opening surface, and it also comprises a lid that is connected and makes this opening surface sealing with housing, and lid is made by the same high-temperature resistance plastice with housing.

After adopting above structure, the present invention compared with prior art has following advantage:

Lid makes housing seal, and because lid is identical with the material of housing, the coefficient that expands with heat and contract with cold is identical, so lid and housing can not produce because of the variation of temperature the slit, make the sealing effectiveness of this transformer better, this transformer can well reach the requirement of water proof and dust proof, when using under abominable condition, the useful life of this transformer is longer, and does not exist owing to transformer loses the potential safety hazard that sealing is brought.

As preferably, described engineering plastics are the PET plastics, and the PET plastics are poly terephthalic acid class plastics, and PET plastics heat resisting temperature is higher, and case hardness is high, is applicable to the shell as transformer.

As preferably, described lid links to each other by ultrasonic bonding with housing, and after ultrasonic bonding, combining together in the junction of lid and housing, has reached hermetic effect, good sealing effect.

As preferably, the edge of the inner surface of described lid is provided with vertically to the extension that extends away from the inner surface direction of lid, the inner surface of lid also is provided with the limiting section that extends to the same direction of extension, gap between extension and the limiting section consists of stopper slot, be provided with a plurality of teeth in the stopper slot, the edge of opening surface is connected in the stopper slot and by ultrasonic bonding and links to each other with a plurality of teeth, when lid links to each other with housing, the edge of the opening surface of housing is connected in the stopper slot, then the welding by ultrasonic welding machine, a plurality of teeth in the stopper slot are dissolved in the stopper slot, edge and a plurality of tooth of the opening surface of housing are fused into one, make the opening surface sealing of housing, further the lift-off seal effect.

As preferably, described a plurality of teeth evenly distribute, and that is to say that a plurality of teeth evenly distribute along stopper slot, after ultrasonic bonding, make that the edge of opening surface of housing is whole to be tightly connected with lid, are not easy to stay breach, make the sealing effectiveness of this transformer better.

As preferably, four corners at the two ends of the opening surface of described housing are equipped with first connecting portion, four corners at the two ends of lid are equipped with second connecting portion, the first connecting portion and the one by one corresponding setting of the second connecting portion, the inner surface of each the second connecting portion is equipped with one to the contiguous block that extends away from the inner surface direction of the second connecting portion, be equipped with one on each contiguous block to the joint pin that extends away from the inner surface direction of the second connecting portion, be equipped with a connecting hole on each first connecting portion, each joint pin is all pegged graft with each self-corresponding connecting hole and is cooperated, each contiguous block all links to each other by ultrasonic bonding with each self-corresponding first connecting portion, by ultrasonic bonding, contiguous block is melted, the first connecting portion is fused into one with corresponding contiguous block, reach the effect of sealing, and joint pin is plugged in the corresponding connecting hole, when lid and housing being shunk or swell, cooperation by joint pin and connecting hole, make lid and housing that the effect of mutual power be arranged, make lid and housing shrink simultaneously or swell, make the junction of lid and housing can owing to the generation slit of splitting is out of shape in the generation of expanding with heat and contract with cold, further not promote the sealing effectiveness of this transformer.

Description of drawings

Fig. 1 is the structural representation of transformer of the present invention;

Fig. 2 is the vertical view of the lid of transformer of the present invention;

Fig. 3 is the structural representation of the lid of transformer of the present invention;

Fig. 4 be transformer of the present invention housing pour into vertical view behind the epoxy resin;

Fig. 5 be transformer of the present invention housing do not pour into epoxy resin the time vertical view.

Wherein, 1, housing; 101, opening surface; 102, the first connecting portion; 103, connecting hole; 2, lid; 201, extension; 202, limiting section; 203, tooth; 204, contiguous block; 205, joint pin; 206, stopper slot; 207, the second connecting portion; 3, epoxy resin; 4, primary coil; 5, secondary coil; 6, silicon steel sheet.

Embodiment

Below in conjunction with the drawings and specific embodiments the present invention is described in more detail.

By shown in Figure 5, transformer of the present invention comprises the line bag that forms by being wound on primary coil 4 on the skeleton and secondary coil 5, primary coil 4 is welded with elementary lead-in wire, secondary coil 5 is welded with secondary lead, wrap online plug-in mounting silicon steel sheet 6 and form transformer body, silicon steel sheet 6 is by stacked under upper, the edge of silicon steel sheet 6 is smooth, transformer body is positioned in the housing 1, and in housing 1, pour into epoxy resin 3, epoxy resin 3 is poured into 101 1 to two millimeters of opening surfaces that are lower than housing 1, and the opening surface 101 of housing 1 is connected with a lid 2, and lid 2 and housing 1 are made by PET plastics (poly terephthalic acid class plastics).

The edge of the inner surface of described lid 2 is provided with vertically to the extension 201 that extends away from the inner surface direction of lid 2, the inner surface of lid 2 also is provided with the limiting section 202 that extends to extension 201 same directions, that is to say that limiting section 202 is located at covers 2 inner surface, limiting section 202 vertically extends to the inner surface direction away from lid 2, the medial surface of limiting section 202 close extensions 201 also leaves the gap, gap between extension 201 and the limiting section 202 consists of stopper slot 206, be provided with a plurality of equally distributed teeth 203 in the stopper slot 206, the material of tooth 203 is the PET plastics, four corners at the two ends of the opening surface 101 of described housing 1 are equipped with first connecting portion 102, each first connecting portion 102 all be located at peristome 101 Width the edge and stretch out along the edge of peristome 101 length directions, four corners at the two ends of lid 2 are equipped with second connecting portion 207, the first connecting portion 102 and the one by one corresponding setting of the second connecting portion 207, the inner surface of each the second connecting portion 207 is equipped with one to the contiguous block 204 that extends away from the inner surface direction of the second connecting portion 207, be equipped with one on each contiguous block 204 to the joint pin 205 that extends away from the inner surface direction of the second connecting portion 207, be equipped with a connecting hole 103 on each first connecting portion 102, that is to say a joint pin 205 corresponding connecting holes 103.

Lid 2 and housing 1 are fixedly the time, the edge of opening surface 101 is connected in the stopper slot 206, and the edge of opening surface 101 and a plurality of tooth 203 are offseted, each joint pin 205 is plugged in each self-corresponding connecting hole 103 simultaneously, each contiguous block 204 offsets with each self-corresponding first connecting portion 102, then the effect by supersonic welder, each contiguous block 204 and tooth 203 are melted, a plurality of teeth 203 are dissolved in the stopper slot 206, the edge of opening surface 101 and the tooth 203 after the melting are solidified as a whole, each contiguous block 204 melts, each first connecting portion 102 that makes housing 1 all is solidified as a whole with corresponding contiguous block 204 separately, thereby opening surface 101 is sealed fully, make this transformer sealing.

Below only use better example with regard to the present invention and made explanation, but can not be interpreted as it is limitations on claims, structure of the present invention can have other variations, is not limited to said structure.In a word, all various variations of doing in the protection range of independent claims of the present invention are all in protection scope of the present invention.

Claims

1. transformer, it comprises housing (1), this housing (1) has an opening surface (101), it is characterized in that: it also comprises a lid (2) that is connected and makes this opening surface (101) sealing with housing (1), and lid (2) is made by the same engineering plastics with housing (1).

2. transformer according to claim 1, it is characterized in that: described engineering plastics are the PET plastics.

3. transformer according to claim 1 and 2, it is characterized in that: described lid (2) links to each other by ultrasonic bonding with housing (1).

4. transformer according to claim 3, it is characterized in that: the edge of the inner surface of described lid (2) is provided with vertically to the extension (201) that extends away from the inner surface direction of lid (2), the inner surface of lid (2) also is provided with the limiting section (202) that extends to the same direction of extension (201), gap between extension (201) and the limiting section (202) consists of stopper slot (206), be provided with a plurality of teeth (203) in the stopper slot (206), the edge of opening surface (101) is connected in the stopper slot (206) and by ultrasonic bonding and links to each other with a plurality of teeth (203).

5. transformer according to claim 4 is characterized in that: the even distribution of described a plurality of teeth (203).

6. transformer according to claim 5, it is characterized in that: four corners at the two ends of the opening surface (101) of described housing (1) are equipped with first connecting portion (102), four corners at the two ends of lid (2) are equipped with second connecting portion (207), the first connecting portion (102) and one by one corresponding setting of the second connecting portion (207), the inner surface of each the second connecting portion (207) is equipped with one to the contiguous block (204) that extends away from the inner surface direction of the second connecting portion (207), be equipped with one on each contiguous block (204) to the joint pin (205) that extends away from the inner surface direction of the second connecting portion (207), be equipped with a connecting hole (103) on each first connecting portion (102), each joint pin (205) is all pegged graft with each self-corresponding connecting hole (103) and is cooperated, and each contiguous block (204) all links to each other by ultrasonic bonding with each self-corresponding first connecting portion (102).