CN206195014U - Aluminium terminal and copper aluminium transitional coupling ware - Google Patents

Abstract

The utility model discloses an aluminium terminal and copper aluminium transitional coupling ware. Wherein, the aluminium terminal is including the chamber of inserting of the aluminum conductor that is used for pegging graft, insert the chamber include the internal diameter with the first cavity of sinle silk external diameter assorted of aluminum conductor, and the internal diameter and the insulating layer external diameter assorted second cavity of aluminum conductor, the rear end of first cavity is connected with the front end of second cavity, the minimum wall thickness (MINI W. ) of inserting the chamber is not less than 16 times of insulating layer wall thickness. Copper aluminium transition terminal includes copper terminal and at least one wherein, copper terminal fixes on the front end of the first cavity of aluminium terminal. The utility model discloses not only can prevent that the aluminium terminal from the crackle appearing, being favorable to the cost of the product of making to rationalize at the crimping in -process, but also can improve the electric conductive property between aluminium terminal and the aluminum conductor.

Description

A kind of aluminium terminal and copper-aluminium transition connector

Technical field

The utility model is related to a kind of aluminium terminal being assemblied in the copper-aluminium transition connector of motor vehicles and uses The copper-aluminium transition connector that the aluminium terminal is formed.

Background technology

The power equipment of power equipment, especially motor vehicles, its terminals are generally fabricated by by copper material, if this connects (aluminum conductor includes core and wraps up the insulating barrier of the core line end, and the core main component is aluminium or aluminium with aluminum conductor Alloy) be joined directly together, contact resistance can be very big, when equipment longtime running, overload or short circuit, junction will be brought rapidly up and Initiation accident.Therefore, treated copper aluminium connector or copper-aluminium transition row are generally used.

The U of Chinese utility model patent CN 203312469 disclose a kind of copper-aluminium joint, be mainly used in power equipment with Make between aluminum conductor transition connection, its mainly connect including：Aluminum steel, aluminum pipe, copper tip, wherein, the aluminum steel includes line Beam and the insulating barrier being wrapped in outside wire harness；On aluminum steel, insulating barrier is removed in one end to the aluminium pipe sleeve positioned at the aluminum steel end Wire harness on, the other end be located at adjacent insulating barrier on；Aluminum pipe inside is stepped, interior cascaded surface and the insulating barrier end Face matches.

But the joint of aluminium and copper of this spline structure, the size to aluminum pipe does not make limitation, and its surrender of the aluminum pipe commonly used is strong Degree is general in 30MPa or so, so when aluminum conductor is crimped, if the wall thickness of aluminum pipe is excessively thin, being easily caused aluminum pipe and occurring splitting There is obvious crackle so as to influence the overall mechanical properties of copper-aluminium joint after scratching in line.And when the wall thickness of aluminum pipe is blocked up, Improvement of the increased wall thickness to the compression joint performance of product, mechanical performance, electric property it is very little, but also need to use big The aluminium of amount, substantially increases cost of manufacture.

Simultaneously as be between aluminum conductor and aluminum pipe using crimping mode realize connection, if so crimping effect it is bad, Easily space is left between aluminum pipe and the core of aluminum conductor or between the core of aluminum conductor, it is difficult to completely cut off air and water, while also Can corrode core oxidation by air, cause the resistance between core and aluminum pipe to increase, greatly reduce aluminum conductor and aluminum pipe Between electric conductivity.

Utility model content

In order to overcome the deficiencies in the prior art, first purpose of the present utility model is that offer is a kind of can not only press Prevent from crackle itself from occur in termination process, be conducive to the cost of made product to rationalize, but also itself and aluminium can be improved The aluminium terminal of the electric conductivity between wire.Second utility model purpose of the present utility model is to provide one kind to have used institute State the copper-aluminium transition connector of aluminium terminal.

In order to realize above-mentioned first purpose, the technical scheme that the utility model is used is specific as follows：

A kind of aluminium terminal, including for the slotting chamber of grafting aluminum conductor, the slotting chamber includes the line of internal diameter and the aluminum conductor The first cavity that core external diameter matches, and the second cavity that internal diameter matches with the insulating barrier external diameter of the aluminum conductor；It is described The rear end of the first cavity is connected with the front end of the second cavity；The minimum wall thickness (MINI W.) in the slotting chamber is not less than the insulating barrier wall thickness 1/6 times.

Preferably, the thickest in the slotting chamber is not more than 18 times of the insulating barrier wall thickness.

Preferably, the chamfered shape structure of the inwall of the connection position of first cavity and the second cavity.

Preferably, the front end of first cavity is provided with opening.

Preferably, it is provided with for turning on the core and the first cavity between the inwall and the core of first cavity Conductive coating layer.

In order to realize above-mentioned second purpose, the technical scheme that the utility model is used is specific as follows：

A kind of copper-aluminium transition connector, including copper tip and at least one above-mentioned aluminium terminal；The copper tip is fixed on On the front end of the first cavity of the aluminium terminal.

Preferably, the copper tip is welded on the front end of first cavity.

Further, the copper tip passes through friction welding or resistance welding or laser welding or electron beam welding or pressure welding Mode is fixed on the front end of first cavity.

Preferably, the copper tip is in hollow shape structure.

Further, the copper tip and the joint face of the first cavity front end are plane.

Or, the copper tip is folding face with the joint face of the first cavity front end.

Preferably, the quantity more than at least two of the aluminium terminal, the aluminium terminal is in line in the horizontal direction, and And the side wall of adjacent aluminium terminal is fixedly connected.

Or, the quantity more than at least two of the aluminium terminal, the aluminium terminal is in line in the horizontal direction, and Adjacent aluminium terminal is spaced from each other.

Or, the copper tip is three-port structure；The quantity of the aluminium terminal is three；The of three aluminium terminals One cavity front end corresponds to three end faces of the three-port structure respectively, and corresponding first cavity front end is solid with corresponding end face Surely connect.

Compared to existing technology, the beneficial effects of the utility model are：

1st, utility model people sums up from multiple compression test and creative development：Aluminium terminal insert When the chamber compressive deformation suffered when aluminum conductor is crimped is more than the wall thickness in its slotting chamber itself, slotting chamber is easy for crackle occur, and As long as and utility model people also found and control the insulating barrier wall thickness of the minimum wall thickness (MINI W.) in slotting chamber and aluminum conductor value between the two Relation, then can efficiently control the compressive deformation scope in slotting chamber when aluminum conductor is crimped, and crackle occur so as to avoid slotting chamber.And Also confirmed in the compression experiment of pressure of about 30Mpa is applied to aluminium terminal, if the minimum wall thickness (MINI W.) in slotting chamber is arranged on into aluminium During insulating barrier wall thickness 1/7 or 1/8 or 1/9 or 1/10 or 1/11 or 1/12 of wire, aluminium terminal surface of the present utility model occurs Obvious slight crack, and the minimum wall thickness (MINI W.) in slotting chamber is arranged on the insulating barrier wall thickness 1/6 or 1/5 or 1/4 or 1/3 or 1/2 of aluminum conductor Or 1 or 2 or 3 ... or when 15 times or 18 times or 20 times, in the case where identical pressure condition is applied, aluminium terminal table of the present utility model Face does not occur slight crack.So, utility model people think, the minimum wall thickness (MINI W.) in slotting chamber is set at least into the 1/ of insulating barrier wall thickness At 6 times, then the phenomenon that aluminium terminal occurs fracture when aluminum conductor is crimped can be efficiently reduced.

Meanwhile, when the minimum wall thickness (MINI W.) in the slotting chamber is more than or equal to described 1/6 times of this critical value of insulating barrier wall thickness, When forming copper aluminium connector with copper tip, moreover it is possible to increase the impact strength of aluminium terminal and aluminum conductor junction, further ensure it Both electrical connection performances.

2nd, it is 18 times of the insulating barrier wall thickness that the thickest in the slotting chamber is not more than, and be disclosure satisfy that in guarantee aluminium terminal Under the premise of its necessary electric property and compression joint performance demand, the cost of manufacture of aluminium terminal can also be saved.

3rd, first cavity in the slotting chamber and the chamfered shape structure of the connection position inwall of the second cavity, the angled construction Aluminium terminal can be avoided obvious failure crack occur in extruding, and it is possible to prevente effectively from right-angle side in compression to heart yearn and insulation Impression or Friction mark that skin is caused, so as to avoid influenceing properties of product.

4th, the conductive coating layer between the inwall and the core of first cavity can not only improve inwall and core it Between electrical contact, and the air between inwall and core, moisture and other impurities can also be excluded, prevent core to be oxidized, And the resistance between reduction core and aluminium terminal, it is to avoid resistance is over time because of reasons such as oxidations between core and aluminium terminal Raise, so as to further improve the electric conductivity between aluminum conductor and aluminium terminal.

5th, copper tip is fixed by friction welding or resistance welding or laser welding or electron beam welding or pressure welding mode In copper-aluminium transition connector obtained by the front end of the first cavity of the aluminium terminal, the original electricity between copper aluminium can be effectively prevented from React in pond, it is ensured that the mechanical property and electric property of the copper-aluminium transition connector.

6th, the copper tip of copper-aluminium transition connector is in hollow shape structure, on the premise of electric conductivity necessary to meeting, The consumption of copper material can also be effectively saved, the production cost of the copper-aluminium transition connector being not only advantageous to obtained by reduction, and And also help and make the quality lightweight of the copper-aluminum transition terminal.

7th, in the copper-aluminium transition connector, the copper tip is plane with the joint face of the first cavity of aluminium terminal front end When, it is because the end face of copper, aluminium terminal easily aligns so easily implementing welding and affixed between copper, aluminium terminal when welding is implemented Effect is strong, while will not also easily produce the problems of welded quality such as bead and stomata, not only greatly reduces poor products rate, saves Production cost, and also advantageously improve copper-aluminium transition connector security reliability in use.

8th, in the copper-aluminium transition connector, the copper tip is folding face with the joint face of the first cavity of aluminium terminal front end When, substantially increase effective contact area of copper tip and aluminium terminal, it is ensured that good electric conductivity, and also enhance Mechanical property when copper, aluminium terminal are welded, reduces copper, the contact surface resistance of aluminium terminal.

9th, in the copper-aluminium transition connector, during quantity more than at least two of the aluminium terminal, can significantly carry The service efficiency of the copper aluminium connector high.The connector can replace multiple terminals on the high current charging appliance such as new-energy automobile It is connected, is both saved space, saved cost, efficiency of assembling is improve again.

Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model Art means, and being practiced according to the content of specification, and in order to allow above and other purpose of the present utility model, feature Can be become apparent with advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, described in detail as follows.

Brief description of the drawings

Fig. 1 is the attachment structure schematic diagram of the first more preferably implementation method and aluminum conductor of aluminium terminal of the present utility model；

The attachment structure schematic diagram of Fig. 2 is aluminium terminal of the present utility model second more preferably implementation method and aluminum conductor；

Fig. 3 is the attachment structure schematic diagram of the third more preferably implementation method and aluminum conductor of aluminium terminal of the present utility model；

Fig. 4 is the connection of the first more preferably implementation method and aluminum conductor of copper-aluminium transition connector construction of the present utility model Structural representation；

The connection of Fig. 5 is copper-aluminium transition connector construction of the present utility model second more preferably implementation method and aluminum conductor Structural representation；

Fig. 6 be copper-aluminium transition connector construction of the present utility model the third more preferably the first structure of implementation method with The attachment structure schematic diagram of aluminum conductor；

Fig. 7 be copper-aluminium transition connector construction of the present utility model the third more preferably second structure of implementation method with The attachment structure schematic diagram of aluminum conductor；

Fig. 8 be copper-aluminium transition connector construction of the present utility model the third more preferably the third structure of implementation method with The attachment structure schematic diagram of aluminum conductor；

Fig. 9 be copper-aluminium transition connector construction of the present utility model the third more preferably the 4th kind of structure of implementation method with The attachment structure schematic diagram of aluminum conductor；

Figure 10 is the company of 4th kind of copper-aluminium transition connector construction of the present utility model more preferably implementation method and aluminum conductor Connect structural representation；

Figure 11 is the company of 5th kind of copper-aluminium transition connector construction of the present utility model more preferably implementation method and aluminum conductor Connect structural representation；

Figure 12 is the first structure of 6th kind of copper-aluminium transition connector construction of the present utility model more preferably implementation method With the attachment structure schematic diagram of aluminum conductor；

Figure 13 is second structure of 6th kind of copper-aluminium transition connector construction of the present utility model more preferably implementation method With the attachment structure schematic diagram of aluminum conductor；

Figure 14 is the company of 7th kind of copper-aluminium transition connector construction of the present utility model more preferably implementation method and aluminum conductor Connect structural representation；

Figure 15 is the first structure of 8th kind of copper-aluminium transition connector construction of the present utility model more preferably implementation method With the attachment structure schematic diagram of aluminum conductor；

Figure 16 is second structure of 8th kind of aluminum bronze transition connector structure of the present utility model more preferably implementation method With the attachment structure schematic diagram of aluminum conductor；

Figure 17 is the company of 9th kind of aluminum bronze transition connector structure of the present utility model more preferably implementation method and aluminum conductor Connect structural representation；

Figure 18 is the company of tenth kind of aluminum bronze transition connector structure of the present utility model more preferably implementation method and aluminum conductor Connect structural representation；

Figure 19 is the company of a kind of preferred embodiment of aluminum bronze transition connector structure the tenth of the present utility model and aluminum conductor Connect structural representation；

Figure 20 is the three-port structure in the 12nd kind of preferred embodiment of aluminum bronze transition connector structure of the present utility model Schematic diagram.

In figure, 1, aluminium terminal；11st, the first cavity；12nd, the second cavity；2nd, aluminum conductor；21st, core 22, insulating barrier；3rd, copper Terminal；31st, threeway end face；32nd, closed cavity；4th, fall angled construction；5th, the entrance that copper tip is penetrated for aluminum conductor；H, minimal wall It is thick.

Specific embodiment

Further to illustrate that the utility model is to reach technological means and effect that predetermined utility model purpose is taken, Below in conjunction with accompanying drawing and preferred embodiment, to according to specific embodiment of the present utility model, structure, feature and its effect, in detail Carefully it is described as follows：

Aluminium terminal structure 1 (right angle)

It is the first structure of aluminium terminal of the present utility model 1 that Fig. 1 shows, including for the slotting chamber of grafting aluminum conductor 2, institute The first cavity 11 that slotting chamber matches including internal diameter with the external diameter of core 21 of the aluminum conductor 2 is stated, and internal diameter is led with the aluminium The second cavity 12 that the external diameter of insulating barrier 22 of line 2 matches；The front end phase of the rear end of first cavity 11 and the second cavity 12 Connection；1/6 times of the minimum wall thickness (MINI W.) H in the slotting chamber not less than the insulation wall thickness.

During installation, first the insulating barrier 22 of the front end of aluminum conductor 2 is removed to expose the core 21, then aluminum conductor 2 is inserted To in the slotting chamber, and the exposed portion of the core 21 is set to be located at first cavity 11 and the SI semi-insulation not removed Layer 22 is located in second cavity 12, about 30MPa pressure is then applied on aluminium terminal 1, so as to the aluminium terminal 1 will be realized With being fixed for part aluminum conductor 2 on its interior.

Tested by compression experiment, when applying the pressure of 30MPa to aluminium terminal 1 at ambient pressure, if by the minimum in slotting chamber When wall thickness is arranged on insulating barrier wall thickness 1/7 or 1/8 or 1/9 or 1/10 or 1/11 or 1/12 of aluminum conductor, aluminium of the present utility model There is obvious slight crack in terminal surfaces, and the minimum wall thickness (MINI W.) in slotting chamber is arranged on the insulating barrier wall thickness 1/6 or 1/5 or 1/ of aluminum conductor 4 or 1/3 or 1/2 or 1 or 2 or 3 ... or when 15 times or 18 times or 20 times, in the case where identical pressure condition is applied, this practicality is newly The surface of aluminium terminal 1 of type does not occur slight crack.So, slotting chamber minimum wall thickness (MINI W.) of the present utility model is at least the insulating barrier wall The phenomenon that aluminium terminal 1 occurs fracture when aluminum conductor 2 is crimped can be efficiently reduced when thick 1/6.

Meanwhile, when the minimum wall thickness (MINI W.) H in the slotting chamber is more than or equal to the insulating barrier 22 wall thickness, 1/6 times of this critical value When, when copper aluminium connector is formed with copper tip 3, moreover it is possible to ensure the mechanical strength of aluminium terminal 1 and the junction of aluminum conductor 2, enter one Step ensures the electrical connection performance of both.

It should be noted that the aluminium terminal 1 shown in Fig. 1, because the thickness of the first cavity 11 and the second cavity 12 is uniform , and the first cavity 11 wall thickness of the wall thickness more than the second cavity 12, so in this configuration, the minimum wall thickness (MINI W.) in the slotting chamber H substantially refers to the minimum wall thickness (MINI W.) of the second cavity 12 shown in Fig. 1.Certainly, to those skilled in the art, for inserting The understanding of the minimum wall thickness (MINI W.) H in chamber should not be construed as limited to the mode shown in above-mentioned Fig. 1, when the wall thickness of the first cavity 11 is equal to second During the wall thickness of cavity 12, the minimum wall thickness (MINI W.) H in the slotting chamber is the minimum wall thickness (MINI W.) of the first cavity 11 or the minimum of the second cavity 12 Wall thickness；Or, when the wall thickness of the first cavity 11 is less than the wall thickness of the second cavity 12, the minimum wall thickness (MINI W.) H in the slotting chamber is first The minimum wall thickness (MINI W.) of cavity 11；Or, when the wall thickness of the first cavity 11 and the wall thickness of the second cavity 12 are gradual change type or phase step type When, the minimum wall thickness (MINI W.) H in now described slotting chamber is interpreted as the minimum value in both the first cavity 11 and the second cavity 12 wall thickness.

And be disclosure satisfy that under the premise of its necessary electric property and compression joint performance demand in guarantee aluminium terminal 1, may be used also To save the cost of manufacture of aluminium terminal 1, used as the further improvement of the structure of this aluminium terminal 1, the thickest in the slotting chamber is little In 18 times (thickest in i.e. described slotting chamber is at most 18 times of the wall thickness of the insulating barrier 22) for the wall thickness of the insulating barrier 22.

The rectangular cross-section of the cavity 12 of first cavity 11 and second.The internal diameter of first cavity 11 is slightly larger than described The external diameter of aluminum conductor core 21；Diameter of the internal diameter of second cavity 12 slightly larger than the core 21 and 2 times of aluminum conductor insulation 22 wall thickness sum of layer.

The main component of the core 21 is aluminum or aluminum alloy, and the core 21 can be made up of a heart yearn, it is also possible to by A plurality of heart yearn is interwoven.

In order to improve the electric conductivity between the aluminum conductor 2 and aluminium terminal 1, the inwall of first cavity 11 with it is described The conductive coating layer (not shown) for turning on the cavity 11 of the core 21 and first is provided between core 21.By being provided with institute Conductive coating layer is stated, can not only improve the electrical contact between the inwall of the first cavity 11 and core 21, and can also exclude in described Air, moisture and other impurities between wall and core 21, prevent core 21 to be oxidized, and reduce core 21 and aluminium terminal Resistance between 1, while conductive coating layer also avoid resistance between core and aluminium terminal over time because of oxidation etc. Reason is raised, the purpose of the electric conductivity being finally reached between further improvement aluminum conductor 2 and aluminium terminal 1.

In order to increase the mobility of the conductive coating layer, the conductive coating layer includes at least current-carrying part of 15wt% With and the at most carrier part of 85wt%.

In order that the current-carrying part can be uniformly distributed in conductive coating layer inside, it is ensured that between aluminum conductor 2 and aluminium terminal 1 Electric conductivity, as the further improvement of this aluminium terminal structure, the main conductive part by 30-90wt% of the conductive coating layer Divide, and the carrier part of 10-70wt% is constituted.

Specifically, the carrier part includes resin matrix and binder.The carrier part also includes crosslinking agent, coupling One or more in agent and dispersant.The resin matrix can be effectively combined current-carrying part, fill space to keep away Exempt from air, steam and impurities left between the first cavity 11 and core 21；It is equal that the dispersant is used to help current-carrying part Even distribution, the binder is used to improve the bonding force between carrier part and current-carrying part, and the crosslinking agent is used to increase institute The bulk strength and elasticity of conductive coating layer are stated, the coupling agent is used to strengthen the work that be combined with each other of conductive coating layer ingredient With.

As the first preferred ingredient of this aluminium terminal structure conductive portion, the current-carrying part at least include bronze end, In silver powder, copper powders, aluminium powder, zinc powder, iron powder, cadmium dust, magnesium dust, lithium powder, tin powder and nickel by powder It is a kind of.

Following table is conductive coating layer the leading under different conductive compositions ratios formed using dissimilar metals powder Electric performance test data：

As can be seen from the above table, for same metal dust, its addition is bigger, the conductive coating layer for being formed Resistivity is lower, and the electric conductivity between aluminum conductor 2 and aluminium terminal 1 is better；Conversely, the addition of metal dust is smaller, institute The resistivity of the conductive coating layer of formation is bigger, and the electric conductivity between aluminum conductor 2 and aluminium terminal 1 is poorer.In this table, for Same metal dust, electric conductivity be preferably metal dust addition by 100% when the conductive coating layer that is formed, it is and conductive Performance it is worst be metal dust addition by 15% when formed conductive coating layer.

In different types of metal dust, in the case of identical addition, aluminium powder, magnesium powder, zinc powder, cadmium powder, iron powder, Glass putty, inexpensively, but because magnesium powder is relatively more active in atmosphere, iron powder is in atmosphere easily by oxygen for the use cost of nickel powder Change corrosion, cadmium powder is relatively low with the electric conductivity of glass putty, so in the case of demand low production cost, preferably aluminium powder, zinc Powder or nickel powder are used as conductive compositions；And among silver powder, copper powder, bronze, lithium powder, silver powder, the electric conductivity ratio of copper powder and bronze Above-mentioned metal dust conducts electricity very well, while bronze and silver powder stable chemical nature, but it is expensive, so be not suitable for low Used under the occasion of production cost, and lithium powder is expensive, electric conductivity is relatively general, and copper powder electric conductivity preferably, is produced into This is relatively low.So, in actual production, the producer can neatly be adjusted according to actual budget conductive coating layer it is conductive into The concrete composition divided, such as on the basis of electric conductivity needed for meeting, can suitably reduce the use of your current-carrying part, from And save production cost.

Used as second preferred ingredient of aluminium terminal structure conductive portion, the current-carrying part is mainly made up of graphite powder.

Following table is conducting performance test of the conductive coating layer for using graphite powder to be formed under different conductive compositions ratios Data：

As can be seen from the above table, second preferred ingredient of this aluminium terminal structure conductive portion uses graphite powder, finally with The conductive coating layer that carrier part is formed can also reach corresponding conductive effect, but with foregoing use bronze end, silver powder, The metal dusts such as copper powders, aluminium powder, zinc powder, iron powder, cadmium dust, magnesium dust, lithium powder, tin powder and nickel by powder are made For the first preferred ingredient of current-carrying part is compared, its electric conductivity is slightly poor, but its current-carrying part for being formed is produced into This can significantly decrease the production cost of current-carrying part but well below foregoing the first preferred ingredient.

Aluminium terminal structure 2 (chamfering)

Fig. 2 show be the utility model aluminium terminal second structure, it is unique with the first structure shown in Fig. 1 Distinctive points are：The chamfered shape structure 4 of inwall of the connection position of the cavity 12 of first cavity 11 and second.The chamfering shape knot Structure 4 can not only be effectively prevented from aluminium terminal 1 and occur obvious failure crack in extruding, and avoid the right-angle side shown in Fig. 1 in pressure The impression or Friction mark caused to heart yearn 21 and insulated hull 22 during contracting, so as to avoid influenceing properties of product.

During installation, first the insulating barrier 22 of the front end of aluminum conductor 2 is removed to expose the core 21, then insert aluminum conductor 2 Enter in the slotting chamber.

Aluminium terminal structure 3 (opening)

Fig. 3 is shown the third structure of the utility model aluminium terminal, and it is unique with second structure shown in Fig. 2 Distinctive points are：The front end of first cavity 11 is provided with opening.When copper-aluminium transition connector is formed, the aluminum conductor can be made Core 21 in 2 is through the opening contact copper tip 3 so that directly connect with copper tip 3.

Additionally, the invention also discloses the copper-aluminium transition connector formed using foregoing aluminium terminal structure.Below Concrete structure to the copper-aluminium transition connector is further described.

Copper-aluminium transition connector construction 1 (right angle+plane)

It is the first copper-aluminium transition connector construction of the utility model that Fig. 4 shows, it includes copper tip 3 and at least one Aluminium terminal 1 shown in Fig. 1, the copper tip 3 is fixed on the front end of the first cavity 11 of the aluminium terminal 1.In the first copper In aluminium transition connector structure, the quantity of preferably described aluminium terminal 1 is 1.

Specifically, the copper tip 3 passes through friction welding or resistance welding or laser welding or electron beam welding or pressure welding Mode is fixed on the front end of first cavity 11.Compared to the copper-aluminium transition connector formed using other welding manners, The galvanic interaction between copper aluminium can be effectively prevented from, it is ensured that the mechanical property and electric property of the copper-aluminium transition connector.

Specifically, the copper tip 3 and the joint face of the front end of the first cavity 11 are plane.When welding is implemented, Because copper, aluminium terminal end face easily alignment so easily implement welding, and affixed effect is strong between copper, aluminium terminal, while also not The problems of welded quality such as bead and stomata can be easily produced, poor products rate is not only greatly reduced, production cost is saved, but also Be conducive to improving copper-aluminium transition connector security reliability in use.

Copper-aluminium transition connector construction 2 (chamfering+plane)

It is second copper-aluminium transition connector construction of the utility model that Fig. 5 shows, it includes copper tip 3 and at least one Aluminium terminal 1 shown in Fig. 2, the copper tip 3 is fixed on the front end of the first cavity 11 of the aluminium terminal 1.In second bronze medal In aluminium transition connector structure, the quantity of preferably described aluminium terminal 1 is 1.Specifically, the copper tip 3 passes through friction welding Or resistance welding or laser welding or electron beam welding or pressure welding mode are fixed on the front end of first cavity 11.Compared to adopting The copper-aluminium transition connector formed with other welding manners, can be effectively prevented from the galvanic interaction between copper aluminium, it is ensured that The mechanical property and electric property of the copper-aluminium transition connector.Specifically, the copper tip 3 and the front end of the first cavity 11 Joint face is plane.When welding is implemented, because the end face of copper, aluminium terminal easily aligns so easily implementing welding, and copper, Affixed effect is strong between aluminium terminal, while will not also easily produce the problems of welded quality such as bead and stomata, not only greatly reduces Poor products rates, save production cost, and also advantageously improve copper-aluminium transition connector security reliability in use.

Copper-aluminium transition connector construction 3 (chamfering+folding face)

The third copper-aluminium transition connector construction of the present utility model, it is connected with second copper-aluminium transition described in Fig. 5 Unique distinctive points of device structure are：The copper tip 3 is folding face with the joint face of the front end of the first cavity 11, so that significantly Increased effective contact area of copper tip 3 and aluminium terminal 1, it is ensured that good electric conductivity, and also enhance copper, aluminium end Mechanical property during son welding, reduces copper, the contact surface resistance of aluminium terminal.

And in this copper-aluminium transition connector construction, the folding face is V-shaped (as shown in Figure 6), or the folding face is in Inverted V-shaped (as shown in Figure 7), or the folding face is trapezoidal (as shown in Figure 8), or the folding face in inverted trapezoidal (such as Fig. 9 institutes Show).It should be noted that the folding face is in addition in aforementioned shapes, copper tip 3 and aluminium can also can be increased for other Any folding face shape of effective contact area of terminal 1.

Copper-aluminium transition connector construction 4 (opening+chamfering)

Figure 10 shows the 4th kind of copper-aluminium transition connector construction of the present utility model, and it includes copper tip 3 and at least one Aluminium terminal 1 shown in individual Fig. 3, the copper tip 3 is fixed on the front end of the first cavity 11 of the aluminium terminal 1.At the 4th kind In copper-aluminium transition connector construction, the quantity of preferably described aluminium terminal 1 is 1.

Specifically, the copper tip 3 passes through friction welding or resistance welding or laser welding or electron beam welding or pressure welding Mode is fixed on the front end of first cavity 11.Compared to the copper-aluminium transition connector formed using other welding manners, The galvanic interaction between copper aluminium can be effectively prevented from, it is ensured that the mechanical property and electric property of the copper-aluminium transition connector. Specifically, the copper tip 3 and the joint face of the front end outer wall of first cavity 11 are plane.When welding is implemented, because Copper, aluminium terminal end face easily alignment so easily implement welding, and affixed effect is strong between copper, aluminium terminal, while will not also The problems of welded quality such as bead and stomata are easily produced, poor products rate is not only greatly reduced, production cost is saved, and also have Beneficial to raising copper-aluminium transition connector security reliability in use.

Copper-aluminium transition connector construction 5 (hollow+opening)

5th kind of copper-aluminium transition connector construction of the present utility model, its main improvement be by it is foregoing the first, second Kind, the copper tip 3 of the third and the 4th kind of copper-aluminum transition terminal connector construction be set to hollow-core construction, so, meeting On the premise of necessary electric conductivity, the consumption of copper material can also be effectively saved, be not only advantageous to the copper obtained by reduction The production cost of aluminium transition connector, and also help the quality lightweight of the copper-aluminum transition terminal.With by the 4th kind of copper The copper tip 3 of aluminium transition connector is set to as a example by hollow-core construction, and as shown in figure 11, the rear end of the copper tip 3 is additionally provided with can Core 21 for the aluminum conductor 2 penetrates its internal entrance 5.

Copper-aluminium transition connector construction 6 (hollow)

6th kind of copper-aluminium transition connector construction of the present utility model, its main improvement be by it is foregoing the first, second Kind, the copper tip 3 of the third and the 4th kind of copper-aluminum transition terminal connector construction be set to hollow-core construction, so, meeting On the premise of necessary electric conductivity, the consumption of copper material can also be effectively saved, be not only advantageous to the copper obtained by reduction The production cost of aluminium transition connector, and the quality lightweight of the copper-aluminum transition terminal is also helped, by second and Four kinds of copper tips of copper-aluminium transition connector 3 are set to as a example by hollow-core construction, as shown in Figure 12 and Figure 13, the hollow-core construction tool Body is set to the closed cavity 32 formed in the inside of the copper tip 3.Preferably, the closed cavity 32 is in prism The cylindrical structure or taper structure of structure or cylindrical structure or oval cross section.

Copper-aluminium transition connector construction 7 (multiple aluminium terminal+planes)

7th kind of copper-aluminium transition connector construction of the present utility model, it includes the Fig. 1 or Fig. 2 of copper tip 3 and at least one Or the aluminium terminal 1 shown in Fig. 3, the copper tip 3 is fixed on the front end of the first cavity 11 of the aluminium terminal 1.At the 7th kind In copper-aluminium transition connector construction, the quantity of preferably described aluminium terminal 1 is more than 2.

As a example by by the aluminium terminal 1 described in copper tip 3 and Fig. 2, as shown in figure 14, the quantity of the aluminium terminal 1 is 2, The copper tip 3 is fixed on described by friction welding or resistance welding or laser welding or electron beam welding or pressure welding mode On the front end of one cavity 11.Compared to the copper-aluminium transition connector formed using other welding manners, copper can be effectively prevented from Galvanic interaction between aluminium, it is ensured that the mechanical property and electric property of the copper-aluminium transition connector.

Further, the copper tip 3 and the joint face of the front end of the first cavity 11 of 2 aluminium terminals 1 are plane. When implementing welding, because the end face of copper, aluminium terminal easily aligns so easily implementing welding, and affixed work between copper, aluminium terminal With strong, while will not also easily produce the problems of welded quality such as bead and stomata, poor products rate is not only greatly reduced, save life Cost is produced, and also advantageously improves copper-aluminium transition connector security reliability in use.

Needs says, the quantity of aluminium terminal 1 of this copper-aluminium transition connector construction is not limited to 2, can also be 3,4, The positive integers such as 5 ..., the producer can use very according to the actual quantity that the aluminium terminal 1 is determined using needing It is flexibly convenient.

And in this configuration, the aluminium terminal except can with the aluminium terminal 1 shown in all Fig. 1, or, all figures Outside aluminium terminal 1 shown in 2, or aluminium terminal 1 shown in all Fig. 3, copper aluminium that can also be according to needed for actual conditions The aluminium terminal particular number of transition connector structure, the independent assortment in the aluminium terminal 1 shown in Fig. 1 or Fig. 2 or Fig. 3.

Aluminum bronze transition connector structure 8 (multiple aluminium terminals+folding face)

8th kind of copper-aluminium transition connector construction of the present utility model, it includes the Fig. 1 or Fig. 2 of copper tip 3 and at least one Or the aluminium terminal 1 shown in Fig. 3, the copper tip 3 is fixed on the front end of the first cavity 11 of the aluminium terminal 1.At the 8th kind In copper-aluminium transition connector construction, the quantity of preferably described aluminium terminal 1 is more than 2.

Specifically, the copper tip 3 passes through friction welding or resistance welding or laser welding or electron beam welding or pressure welding Mode is fixed on the front end of the first cavity 11 of the aluminium terminal 1.

Specifically, the copper tip 3 and the joint face of the front end of the first cavity 11 of the aluminium terminal 1 are folding face, so that greatly The earth increased effective contact area of copper tip 3 and aluminium terminal 1, it is ensured that good electric conductivity, and also enhance copper, aluminium Mechanical property when terminal is welded, reduces copper, the contact surface resistance of aluminium terminal.

And in this copper-aluminium transition connector construction, the folding face is V-shaped, or the folding face is in inverted V-shaped, Huo Zheru Shown in Figure 15, the folding face is trapezoidal, or the folding face is in inverted trapezoidal, or as shown in figure 16, the folding face is in abnormity.Need It is noted that the folding face is in addition in aforementioned shapes, copper tip 3 and aluminium terminal 1 can also can be increased for other Effective contact area any folding face shape.And, the aluminium terminal quantity of this copper-aluminium transition connector construction is not limited to 2, Can also be the positive integer such as 3,4,5 ..., the producer can according to the actual quantity that the aluminium terminal is determined using needs, Use very flexible facility.The aluminium terminal except can with the aluminium terminal 1 shown in all Fig. 1, or, all Fig. 2 Shown aluminium terminal 1, or, outside the aluminium terminal 1 shown in all Fig. 3, copper aluminium that can also be according to needed for actual conditions The aluminium terminal particular number of transition connector structure, the independent assortment in the aluminium terminal 1 shown in Fig. 1 or Fig. 2 or Fig. 3.

Aluminum bronze transition connector structure 9 (multiple aluminium terminal+planes+aluminium terminal integration)

Shown in Figure 17 is the 9th kind of copper-aluminium transition connector construction of the present utility model, itself and the 7th kind shown in Figure 14 Unique difference of copper-aluminium transition connector construction is：The aluminium terminal 1 is in line in the horizontal direction, and adjacent aluminium The side wall of terminal 1 is fixedly connected.Such that it is able to disposably the aluminium terminal 1 of more than 2 is welded on copper tip 3, without by aluminium Terminal 1 is welded on copper tip 3 one by one, greatly increases packaging efficiency.

In this configuration, the quantity of the aluminium terminal 1 is preferably 3.Need to say, this copper-aluminium transition connector construction The quantity of aluminium terminal 1 be not limited to 3, can also be the positive integer such as 2,4,5 ..., the producer can be according to actual use needs To determine the quantity of the aluminium terminal 1, very flexible facility is used.And in this configuration, the aluminium terminal is except can With the aluminium terminal 1 shown in all Fig. 1, or, the aluminium terminal 1 shown in all Fig. 2, or the aluminium end shown in all Fig. 3 Outside son 1, the aluminium terminal particular number of copper-aluminium transition connector construction that can also be according to needed for actual conditions, in Fig. 1 or Independent assortment in aluminium terminal 1 shown in Fig. 2 or Fig. 3.

Also, in the copper-aluminium transition connector construction, the first chamber of the copper tip 3 and each aluminium terminal 1 The joint face of the front end of body 11 is not limited to the plane shown in Figure 17, can also be the folding face shown in Figure 15 and Figure 16.

Aluminum bronze transition connector structure 10 (multiple aluminium terminal+plane+aluminium terminal splits)

Shown in Figure 18 is the of the present utility model ten kind of copper-aluminium transition connector construction, itself and the 9th kind shown in Figure 17 Unique difference of copper-aluminium transition connector construction is：The aluminium terminal 1 is in line in the horizontal direction, and adjacent aluminium Terminal 1 is spaced from each other.

Aluminum bronze transition connector structure 11 (multiple aluminium terminal+planes+part aluminium terminal split)

Shown in Figure 19 is a kind of the of the present utility model tenth copper-aluminium transition connector construction, is characterized in Figure 17 institutes The 9th kind of copper-aluminium transition connector construction for showing is combined with both the tenth kind of copper-aluminium transition connector constructions shown in Figure 18, tool Body structure is：The aluminium terminal 1 is in line in the horizontal direction, and wherein at least two aluminium terminal side wall is linked into a whole, Between other aluminium terminals 1 and other aluminium terminals 1 mutually separate with the entirety.

In this configuration, the quantity of the aluminium terminal 1 is preferably 3.Need to say, this copper-aluminium transition connector construction The quantity of aluminium terminal 1 be not limited to 3, can also be the positive integer such as 4,5 ..., the producer can according to it is actual using needs come Determine the quantity of the aluminium terminal 1, use very flexible facility.And in this configuration, the aluminium terminal is except can be with Aluminium terminal 1 shown in all Fig. 1, or, the aluminium terminal 1 shown in all Fig. 2, or the aluminium terminal 1 shown in all Fig. 3 Outside, the aluminium terminal particular number of copper-aluminium transition connector construction that can also be according to needed for actual conditions, in Fig. 1 or Fig. 2 Or independent assortment in the aluminium terminal 1 shown in Fig. 3.

Copper-aluminium transition connector construction 12 (three-port structure)

12nd kind of copper-aluminium transition connector construction of the present utility model, its main improvement is to be set to copper tip 3 Three-port structure, as shown in figure 20, the threeway includes three end faces 31.The quantity of the aluminium terminal 1 is three；Three aluminium The front end of first cavity 11 of terminal corresponds to three end faces 31 of the three-port structure, and the corresponding front end of first cavity 11 respectively It is fixedly connected with corresponding end face 31.

In this way, it is possible on the premise of the consumption for being effectively saved copper material, electrically connecting between three aluminium terminals 1 is realized Connect, the production cost of the copper-aluminium transition connector being not only advantageous to obtained by reduction, and also help the copper-aluminium transition end The quality lightweight of son.

And in order to simplify three-port structure, the production cost of saving copper aluminium transition connector is preferably described in the present embodiment Three-port structure is a three-way pipe.

Above-mentioned implementation method is only preferred embodiment of the present utility model, it is impossible to the utility model protection is limited with this Scope, the change of any unsubstantiality that those skilled in the art is done on the basis of the utility model and replacement belong to In the utility model scope required for protection.

Claims (14)

1. a kind of aluminium terminal, including for the slotting chamber of grafting aluminum conductor, the slotting chamber includes the core of internal diameter and the aluminum conductor The first cavity that external diameter matches, and the second cavity that internal diameter matches with the insulating barrier external diameter of the aluminum conductor；Described The rear end of one cavity is connected with the front end of the second cavity；It is characterized in that：The minimum wall thickness (MINI W.) in the slotting chamber is exhausted not less than described 1/6 times of edge layer wall thickness.

2. aluminium terminal as claimed in claim 1, it is characterised in that：The thickest in the slotting chamber is not more than the insulating barrier wall Thick 18 times.

3. aluminium terminal as claimed in claim 1, it is characterised in that：The inwall of the connection position of first cavity and the second cavity Chamfered shape structure.

4. aluminium terminal as claimed in claim 1, it is characterised in that：The front end of first cavity is provided with opening.

5. aluminium terminal as claimed in claim 1, it is characterised in that：It is provided between the inwall and the core of first cavity Conductive coating layer for turning on the core and the first cavity.

6. a kind of copper-aluminium transition connector, it is characterised in that：Including copper tip and at least one such as claim 1-5 any one Described aluminium terminal；The copper tip is fixed on the front end of the first cavity of the aluminium terminal.

7. copper-aluminium transition connector as claimed in claim 6, it is characterised in that：The copper tip is welded on first cavity Front end on.

8. copper-aluminium transition connector as claimed in claim 7, it is characterised in that：The copper tip passes through friction welding or resistance Welding or laser welding or electron beam welding or pressure welding mode are fixed on the front end of first cavity.

9. copper-aluminium transition connector as claimed in claim 6, it is characterised in that：The copper tip is in hollow shape structure.

10. the copper-aluminium transition connector as described in claim 6-9 any one, it is characterised in that：The copper tip with it is described The joint face of the first cavity front end is plane.

The 11. copper-aluminium transition connector as described in claim 6-9 any one, it is characterised in that：The copper tip with it is described The joint face of the first cavity front end is folding face.

The 12. copper-aluminium transition connector as described in claim 6-9 any one, it is characterised in that：The quantity of the aluminium terminal More than at least two, the aluminium terminal is in line in the horizontal direction, and the side wall of adjacent aluminium terminal is fixedly connected.

The 13. copper-aluminium transition connector as described in claim 6-9 any one, it is characterised in that：The quantity of the aluminium terminal More than at least two, the aluminium terminal is in line in the horizontal direction, and adjacent aluminium terminal is spaced from each other.

The 14. copper-aluminium transition connector as described in claim 6-9 any one, it is characterised in that：The copper tip is threeway Structure；The quantity of the aluminium terminal is three；First cavity front end of three aluminium terminals corresponds to the three-port structure respectively Three end faces, and corresponding first cavity front end is fixedly connected with corresponding end face.