CN208173322U

CN208173322U - Aluminum shell PTC braking resistor

Info

Publication number: CN208173322U
Application number: CN201820678766.9U
Authority: CN
Inventors: 姚易宙; 骆晶晶
Original assignee: SHANGHAI KRAH ELECTRONICS CO Ltd
Current assignee: SHANGHAI KRAH ELECTRONICS CO Ltd
Priority date: 2018-05-08
Filing date: 2018-05-08
Publication date: 2018-11-30
Anticipated expiration: 2028-05-08

Abstract

The utility model relates to a kind of aluminum shell PTC braking resistor, the braking resistor includes PTC core, upper contact chip, lower contact chip, extraction wire, positioning framework, aluminum shell and insulation sleeve；The PTC core upper and lower surface is bonded with upper contact chip, lower contact chip respectively, and it is electrically connected respectively by the extraction wire of contact chip one welding and extraneous realize, the PTC core stacked on top of one another is fixed on the positioning with contact chip by a positioning framework, and is embedded in aluminum shell and is fixed after putting on insulation sleeve on the outside.Compared with prior art, the utility model has many advantages, such as that design of part is compact, easy to processing and satisfactory mechanical property.

Description

Aluminum shell PTC braking resistor

Technical field

The utility model relates to electric control system fields, more particularly, to a kind of aluminum shell PTC braking resistor.

Background technique

PTC (positive temperature coefficient) ceramic material due to resistance value under specific high temperature quickly raised characteristic and by as mistake Thermal protector or temp controlling heater obtain using.Simultaneously under conditions of some middle low power loads, PTC can also be applied to Resistive material when system charge and discharge or braking carries out the conversion of overload current.But it is different from other resistance materials, PTC ceramics The generally existing carrying current density of material is small, the defect of bad mechanical strength, thus in product design take into account material cost and The stability reinforced with PTC structure special consideration should be given to conductive contact is also needed while craftsmanship.Traditional PTC resistor design is still Aluminum shell wire wound resistor general structure composition has so been continued to use, but in the presence of there are core location low precisions, technology stability The risks such as difference, the easy fragmentation of PTC core, influence use of the product in the higher field of some application requirements.Therefore it needs to be related to A kind of completely new fixed structure aluminum shell PTC resistor opens up answering for wide the type product to overcome above problem bring to adversely affect With.

Utility model content

The purpose of this utility model is exactly to provide a kind of aluminum shell PTC to overcome the problems of the above-mentioned prior art Braking resistor.

The purpose of this utility model can be achieved through the following technical solutions：

A kind of aluminum shell PTC braking resistor, the braking resistor include PTC core, upper contact chip, lower contact chip, draw Conducting wire, positioning framework, aluminum shell and insulation sleeve out；The PTC core upper and lower surface is pasted with upper contact chip, lower contact chip respectively It closes, and is electrically connected respectively by the extraction wire of contact chip one welding and extraneous realize, the PTC core stacked on top of one another It is fixed on the positioning with contact chip by a positioning framework, and is embedded in aluminum shell and fixes after putting on insulation sleeve on the outside.

Preferably, the upper contact chip, lower contact chip use identical structure：The contact chip side is curved Foot is rolled over to vertical positioning, the other side is to extend the exit bent out, and the exit and extraction wire use electric resistance welding Connection type fix.

Preferably, rectangular through-hole is equipped among the positioning framework for accommodating PTC core, upper contact chip and lower contact Piece, two sides corresponding position is equipped with rectangular opening for being inserted into the positioning folding of upper and lower contact chip up and down for one end of the positioning framework Foot, the other end are equipped with the exit that groove is used to limit and pass through upper and lower contact chip in corresponding position, wherein the posting The other end of frame is respectively equipped with the position for accommodating the connecting portion of extraction wire and exit, between two extraction wires with Lattice shelves separate.

Preferably, a flat fin is respectively extended in the positioning framework two sides, the insulation sleeve and aluminum shell Corresponding position is respectively equipped with the fin set of cooperation, and the fin set by squeezing aluminum shell two sides makes aluminum shell inner cavity and inner core Component is fastened completely.

Preferably, the PTC core is the potsherd of flat rectangular body structure.

Preferably, the upper and lower surface of the PTC core is tin plating or silver-plated.

Preferably, the upper contact chip and lower contact chip are the thin plate being made using Copper alloy material, described Upper contact chip and lower contact chip electroplate or tin plating.

Preferably, the positioning framework is the positioning framework being made using temperature resistant plastic material.

Preferably, the insulation sleeve is the insulation sleeve being made using polyimides membrane material.

Preferably, the aluminum shell is the aluminum shell made of stretching aluminium profile.

Compared with prior art, the utility model has the following advantages that：

1, a kind of aluminum shell PTC braking resistor of the utility model is designed using special posting, is guaranteeing product electricity While gas insulation performance, solves the problems, such as location difficulty between product PTC core and contact chip in the simplest method.Frame Also effective protection PTC core is not caused to crack frame structure by external force destruction, to substantially increase the technology stability of product And reliability.

2, a kind of aluminum shell PTC braking resistor of the utility model, using aluminum profile as product casing and installation pedestal, And entirety is carried out to resistance core by way of squeezing side deformation and is fixed, it ensure that the reliability of contact while also avoiding squeezing Pressure PTC core causes the risk of rupture.Furthermore fixed structure is crimped but also product, which does not have to a fastener, can be realized peace Dress combination, to save cost, simplifies technique.

Detailed description of the invention

Fig. 1 is the configuration schematic diagram of the PTC braking resistor of the utility model.

Wherein 1 be PTC core, 2 be lower contact chip, 21 be lower exit, 22 for lower positioning roll over foot, 3 be upper contact chip, 31 Foot is rolled over for upper positioning for upper exit, 32,4 be extraction wire, and 5 be positioning framework, and 51 be fin, and 52 be groove, and 53 be small square Shape hole, 6 be insulation sleeve, and 7 be aluminum shell, and 71 be the fin set of aluminum shell.

Specific embodiment

The technical scheme in the embodiment of the utility model will be carried out clear, be fully described by, it is clear that described below Embodiment is a part of the embodiment of the utility model, rather than whole embodiments.Based on the embodiments of the present invention, originally Field those of ordinary skill every other embodiment obtained without making creative work all should belong to this The range of utility model protection.

As shown in Figure 1, a kind of aluminum shell PTC braking resistor, the braking resistor include PTC core 1, upper contact chip 3, Lower contact chip 2, extraction wire 4, positioning framework 5, aluminum shell 7 and insulation sleeve 6.1 upper and lower surface of PTC core respectively with it is upper Contact chip 3 and the fitting of lower contact chip 2, and be electrically connected respectively by the extraction wire 4 of contact chip one welding and extraneous realize. The PTC core 1 stacked on top of one another is fixed on the positioning with contact chip by a positioning framework 5, and puts on insulation on the outside It is in insertion aluminum shell 7 and fixed after set 6.

The upper contact chip 3 and lower contact chip 2 use identical structure：The contact chip side is curved to vertical Foot is rolled in straight positioning, and the other side is to extend the exit bent out, the exit and extraction wire 4 using the company of electric resistance welding It is fixed to guarantee high-temperature stability to connect mode.

Rectangular through-hole is equipped among the positioning framework 5 to be used to accommodate PTC core 1, upper contact chip 3 and lower contact chip 2, Two sides corresponding position is equipped with rectangular opening 53 for being inserted into the positioning folding of contact chip 3 up and down for one end of the positioning framework 5 Foot 22 is rolled in the positioning of foot 32 and lower contact chip 2, and the other end is equipped with groove 52 to limit and by upper contact chip 3 in corresponding position With the exit of lower contact chip 2, to guarantee contact chip and skew, the other end of the positioning framework 5 do not occur for core position It is respectively equipped with the position for accommodating the connecting portion of extraction wire 4 and exit, is divided between two extraction wires 4 with lattice shelves It opens.

A flat fin 51 is respectively extended in 5 two sides of positioning framework, for limit of the posting in aluminum shell And assist to fix after aluminum shell crimping, the corresponding position of the insulation sleeve 6 and aluminum shell 7 is equipped with the fin set of cooperation, leads to The fin set 71 for crossing extruding 7 two sides of aluminum shell makes 7 inner cavity of aluminum shell be fastened completely with inner core component.

The PTC core 1 be flat rectangular body structure potsherd, the upper and lower surface of the PTC core 1 it is tin plating or It is silver-plated.

The upper contact chip 3 and lower contact chip 2 is the thin plate being made using Copper alloy material, the upper contact The electroplate or tin plating of piece 3 and lower contact chip 2.To guarantee that contact also uses silver-plated or tin plating surface treatment mode, it is Current load ability is improved, contact chip is integrally bonded completely to obtain maximum contact area with PTC upper and lower surface.

The positioning framework 5 is the positioning framework being made using temperature resistant plastic material.

The insulation sleeve 6 is the insulation sleeve being made using polyimides membrane material, and the insulation sleeve uses polyamides Imines membrane material has good high temperature resistant and insulation performance.

The aluminum shell 7 be the aluminum shell using stretching aluminium profile made of, with the good capacity of heat transmission and at Type ability, the design of two apical position of aluminum shell have mounting hole, and for fixing entire product, two sides are designed with significant depressions, To constitute the featheredge stretched out along bottom, after being packed into resistance core, two sides featheredge is deformed by squeezing up and down, makes resistance aluminum shell Upper and lower side is adjacent to resistance core completely, achievees the effect that robust structure.

Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to In this, anyone skilled in the art within the technical scope disclosed by the utility model, can be readily occurred in various Equivalent modifications or substitutions, these modifications or substitutions should be covered within the scope of the utility model.Therefore, this is practical Novel protection scope should be subject to the protection scope in claims.

Claims

1. a kind of aluminum shell PTC braking resistor, which is characterized in that the braking resistor include PTC core, upper contact chip, under Contact chip, extraction wire, positioning framework, aluminum shell and insulation sleeve；The PTC core upper and lower surface respectively with upper contact chip, Lower contact chip fitting, and be electrically connected respectively by the extraction wire of contact chip one welding and extraneous realize, it is stacked on top of one another The PTC core is fixed on the positioning with contact chip by a positioning framework, and is embedded in outside aluminium after putting on insulation sleeve on the outside It is in shell and fixed.

2. a kind of aluminum shell PTC braking resistor according to claim 1, which is characterized in that the upper contact chip, under connect Contact uses identical structure：The contact chip side is that foot is rolled in curved to vertical positioning, and the other side is to extend bending Exit out, the exit are fixed with extraction wire using the connection type of electric resistance welding.

3. a kind of aluminum shell PTC braking resistor according to claim 2, which is characterized in that among the positioning framework Equipped with rectangular through-hole for accommodating PTC core, upper contact chip and lower contact chip, two sides pair above and below one end of the positioning framework It answers position to be equipped with rectangular opening and rolls over foot for being inserted into the positioning of upper and lower contact chip, the other end is equipped with groove for limiting in corresponding position Position and the exit for passing through upper and lower contact chip accommodate extraction wire and draw wherein the other end of the positioning framework is respectively equipped with The position of the connecting portion of outlet is separated with lattice shelves between two extraction wires.

4. a kind of aluminum shell PTC braking resistor according to claim 1, which is characterized in that the positioning framework two sides Respectively extend a flat fin, the corresponding position of the insulation sleeve and aluminum shell is respectively equipped with the fin set of cooperation, passes through The fin set for squeezing aluminum shell two sides makes aluminum shell inner cavity be fastened completely with inner core component.

5. a kind of aluminum shell PTC braking resistor according to claim 1, which is characterized in that the PTC core is flat The potsherd of rectangular parallelepiped structure.

6. a kind of aluminum shell PTC braking resistor according to claim 1, which is characterized in that above and below the PTC core Electroplating surfaces with tin is silver-plated.

7. a kind of aluminum shell PTC braking resistor according to claim 1, which is characterized in that the upper contact chip is under Contact chip is the thin plate being made using Copper alloy material, the electroplate or plating of the upper contact chip and lower contact chip Tin.

8. a kind of aluminum shell PTC braking resistor according to claim 1, which is characterized in that the positioning framework is to adopt The positioning framework being made with temperature resistant plastic material.

9. a kind of aluminum shell PTC braking resistor according to claim 1, which is characterized in that the insulation sleeve is to use The insulation sleeve that polyimides membrane material is made.

10. a kind of aluminum shell PTC braking resistor according to claim 1, which is characterized in that the aluminum shell is to use Stretch aluminum shell made of aluminium profile.