CN112003096B

CN112003096B - Touch finger type end face blind-plugging large-current connector

Info

Publication number: CN112003096B
Application number: CN202010723347.4A
Authority: CN
Inventors: 陈腾飞; 向华平; 王长武
Original assignee: CETC 14 Research Institute
Current assignee: CETC 14 Research Institute
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2022-08-02
Anticipated expiration: 2040-07-24
Also published as: CN112003096A

Abstract

The invention relates to a touch finger type end face blind-plugging high-current connector which comprises a structural shell, touch finger assemblies, inter-assembly bus bars and external bus bars, wherein the touch finger assemblies are arranged on the structural shell; the contact finger assembly comprises a contact finger piece set and a bus bar seat, the contact finger piece set can elastically deform after being pressed, a plurality of contact finger assemblies are respectively arranged on the structural shell through the bus bar seat in a compact mode, bus bars among the assemblies are arranged along the contact finger piece set and are respectively connected with contact finger assemblies with the same power supply type and polarity, currents are respectively collected, a plurality of external bus bars on the side portion of the structural shell are respectively connected with the bus bars among the assemblies in a staggered mode, and the contact finger assemblies are connected with external interfaces of the high-current connector through the bus bars among the assemblies and the external bus bars, so that current transmission is realized; the bus bar seat, the bus bar between the assemblies and the external bus bar are respectively made of red copper. The invention solves the problems of compact miniaturization, floating tolerance limitation, insertion and extraction force limitation and heat dissipation of a multi-variety high-current-flux power type blind-mate connector.

Description

Contact finger type end face blind-plugging large-current connector

Technical Field

The invention relates to a current connector, in particular to a touch finger type end face blind-plugging high-current connector.

Background

At present, the integration degree of electronic equipment modules is higher and higher, and the interconnection between modules or between modules and units is more and more complex. In order to make the interconnection of the electronic equipment simple and compact and consider the equipment maintenance in a narrow space, the inside of the electronic equipment or the electronic equipment adopts a blind plugging connection mode as much as possible.

The existing large-current blind-plug connector mostly adopts an elastic plug (jack) contact piece form, but various large-current fluxes have a plurality of problems facing a narrow space. For example, the single contact of the connector has limited current carrying capacity and small bulk power density, and a large number of contacts are needed to realize the technical indexes of various large current fluxes, so that the connector has a large volume and is not suitable for realizing compact layout, and the larger the number of contacts, the larger the insertion force, and the limited number of contacts which can be integrated by the single connector. In addition, the floating tolerance of a single contact of such a connector is limited, and if a plurality of contacts are integrated into the connector, high mating dimensional accuracy is required to satisfy the floating tolerance of the plurality of contacts at the same time. In a word, under the operating mode to many varieties heavy current flux in narrow and small space, current blind plug connector is difficult to realize that compact space layout is miniaturized, and the tolerance limit that floats is big, and the plug power restriction is big.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a contact finger type end face blind-plugging large-current connector which can solve the problems of compact miniaturization, floating tolerance limitation, plugging force limitation and heat dissipation of a multi-variety large-current flux power type blind-plugging connector in a compact space.

In order to achieve the purpose, the invention provides the following technical scheme: a touch finger type end face blind-plugging high-current connector is characterized by comprising a structural shell, touch finger assemblies, inter-assembly bus bars and external bus bars;

the contact finger assembly comprises a contact finger piece group and a confluence seat, the contact finger piece group can elastically deform after being pressed, the contact finger piece group is positioned in the confluence seat, a plurality of contact finger assemblies are closely arranged on the structural shell through the confluence seat respectively, and bus bars among the assemblies are arranged on two sides of the confluence seat at intervals along the contact finger assemblies and are connected with the contact finger assemblies with the same power supply type and polarity respectively to collect current respectively; the plurality of external bus bars on the side part of the structural shell are respectively connected with the plurality of inter-assembly bus bars in a staggered arrangement manner, and the contact finger assembly is connected with an external interface of the high-current connector through the inter-assembly bus bars and the external bus bars to realize current transmission; the bus bar seat, the bus bar between the assemblies and the external bus bar are respectively made of red copper.

Further, place the insulating piece on the casing of structure, it places to touch the finger subassembly on the insulating piece, touch the finger subassembly with the insulating piece passes through the fix with screw on the casing of structure, screw head cover has insulating cover.

Further, the insulation sheet is SiC or AlN.

Further, the back of the structural shell is provided with a groove, and a heat conduction gasket is attached in the groove.

Furthermore, the arrangement mode of the plurality of contact finger assemblies on the structural shell is a linear type, a matrix type or a circular radiation array type.

Further, it is formed by a plurality of power varieties, the same touching of polarity indicates that the piece is folded in proper order to touch the piece group, and is a plurality of touch and indicate the piece to pass through the busbar is connected and the electric current that gathers between the subassembly, touch and indicate piece bottom card to go into in the draw-in groove on the busbar seat, touch and indicate the piece can follow the draw-in groove direction transversely floats.

Furthermore, the contact finger assembly further comprises a stop pin and a pressing plate, wherein the stop pin and the pressing plate are respectively located at two ends of the confluence seat and are used for limiting the transverse floating amount of the contact finger piece group.

Furthermore, the bus bar seat, the bus bar between the assemblies and the external bus bar are integrally formed.

Furthermore, the high-current connector is fixed on equipment, the connector socket is fixed below electronic equipment, the equipment and the electronic equipment are positioned through the positioning pin, the contact finger piece group is in elastic electrical contact with the connector socket and the bus bar seat, and an axial tolerance amount is formed between the upper end surface of the bus bar seat and the electrical contact surface of the socket.

Further, the structural shell is made of high-specific-rigidity material.

The invention has the beneficial effects that:

the invention solves the problem of compact miniaturization of a multi-variety large-current-flux power type blind plug connector in a compact space, and has the advantages of large floating tolerance amount, small plug force, good heat dissipation performance, long service life, high reliability, low cost and easy popularization and use.

The elastic contact finger piece has high current-carrying capacity, the power density of a current-carrying body of the elastic contact finger piece is 2-3 times that of the existing connector, the floating tolerance amount is large, and the insertion and extraction force is small. According to the invention, the space utilization rate is improved and the structure is compact through the compact arrangement of the plurality of contact finger assemblies on the structural shell and the staggered arrangement of the bus bars among the assemblies and the external bus bars in the space. The invention reduces the temperature rise through the use of the insulating sheet, the insulating sleeve, the heat conducting gasket and the like, and solves the problem of heat dissipation caused by high power density of a large current carrier.

Drawings

FIG. 1 is a perspective view of a touch finger type end face blind mate high current connector of the present invention;

FIG. 2 is a plan view of a contact finger type end face blind mate high current connector of the present invention;

FIG. 3 is a schematic view of a finger assembly of the present invention;

FIG. 4 is a schematic diagram of the contact finger type end surface blind-mate large-current connector of the present invention after glue filling;

fig. 5 is a diagram of other arrangement examples of the contact finger assembly of the contact finger type end surface blind-mate high-current connector according to the present invention.

Wherein: 1-structural shell, 1.1-groove, 1.2-heat conducting gasket, 2-contact finger assembly, 2.1-contact finger sheet set, 2.2-bus seat, 2.3-stop pin, 2.4-pressing plate, 2.5-clamping groove, 2.6-bus seat upper end face, 2.7-socket electric contact face, 3-inter-assembly bus bar, 4-external bus bar, 5-insulating sheet, 6-insulating sleeve, 7-insulating glue, 8-connector socket, 9-device, 10-positioning pin and 11-electronic device.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the present specification, terms of orientation or positional relationship such as up, down, left, right, inside, outside, front, rear, head, and tail are established based on the orientation or positional relationship shown in the drawings. The corresponding positional relationship may also vary depending on the drawings, and therefore, should not be construed as limiting the scope of protection.

In the present invention, the terms "mounted," "connected," "fixed," and the like are to be understood in a broad sense, and for example, may be fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected or capable of communicating with each other, directly connected, indirectly connected through an intermediate medium, or communicated between two components, or interacting between two components. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

This embodiment has recorded a touch finger type terminal surface blind mate heavy current connector, and this heavy current connector adopts touch finger type terminal surface blind mate connection form to realize the current circulation, realizes the compact miniaturization of many varieties heavy current flux power type blind mate connector under the compact space, and its floating tolerance, plug power is little.

As shown in fig. 1, the high-current connector includes a structural shell 1, a contact finger assembly 2, an inter-assembly bus bar 3, and an external bus bar 4. Under the condition that satisfies big flux current, a plurality of contact indicate subassembly 2 to arrange closely on structural housing 1, and bus bar 3 arranges and meets with power variety, the same contact of polarity indicates subassembly 2 respectively along touching indicating subassembly 2 between many subassemblies, the electric current that gathers respectively, and bus bar 3 high-efficient utilization structural housing 1 cubical space between many subassemblies avoids cross effect. Many external bus bars 4 connect respectively at 1 lateral part of structural shell and many inter-module bus bar 3, and inter-module bus bar 3 and external bus bar 4 are crisscross in the space and arrange, have improved space utilization, realize the compact miniaturization of heavy current connector from this.

As shown in fig. 2, an insulating sheet 5 is arranged on the structural shell 1, the contact finger assembly 2 is arranged on the insulating sheet 5, the contact finger assembly 2 and the insulating sheet 5 are fixed on the structural shell 1 through screws, the contact finger assembly 2 and the structural shell 1 are insulated through the insulating sheet 5, and the insulating sleeve 6 is sleeved on the head of the screw. In addition, the back of the structural shell 1 can be made into a groove 1.1, a heat conducting gasket 1.2 is attached in the groove 1.1, and the equivalent thermal resistance of the heat conducting gasket 1.2 is small, so that the contact thermal resistance and the temperature rise can be reduced.

In the embodiment, the structural shell 1 is made of a high-specific-rigidity material such as aluminum alloy; the insulating sheet 5 is made of high-thermal-conductivity materials with good insulativity and thermal conductivity, such as special ceramics of SiC, AlN and the like, so that the thermal conduction resistance can be greatly reduced; the insulating sleeve 6 can be made of epoxy glass cloth laminated board or insulating material such as polyetherimide, PPS and the like.

According to the use requirement, a certain number of contact finger assemblies 2 are regularly arranged on the structural shell 1 according to the variety, rated current capacity and installation space of large current, the arrangement form can be a linear type which is sequentially arranged as shown in fig. 1, or a matrix type and a circular radiation array type which are shown in fig. 5, or other arrangement forms, and the contact finger assemblies can be reasonably designed and arranged according to the requirement in specific implementation.

The contact finger assembly 2 has elastic deformation performance after being pressed, and as shown in fig. 3, the contact finger assembly 2 comprises a contact finger sheet group 2.1, a confluence seat 2.2, a stop pin 2.3 and a pressing plate 2.4. The contact finger piece group 2.1 is formed by sequentially laminating a plurality of contact finger pieces with the same power supply variety and polarity, and the plurality of contact finger pieces are connected through the bus bar 3 between the assemblies to collect current. The touch finger sheet is an elastic touch finger sheet, the current carrying capacity is high, and the power density of a current carrier can be 2-3 times that of the existing connector. The contact finger piece group 2.1 is located in the conflux seat 2.2, and the contact finger piece is blocked in the draw-in groove 2.5 that sets up on the relative both sides of conflux seat 2.2 through the bottom card in, and the contact finger piece can transversely float along draw-in groove 2.5 direction, and the biggest stroke range of contact finger piece is called horizontal floating amount alpha, generally gets alpha 1 ~ 2mm, and the floating tolerance amount is great. The transverse floating amount is mainly used for releasing transverse deformation generated after the contact finger sheet group 2.1 is axially compressed in the blind insertion butt joint process, and reducing internal stress generated when the transverse deformation is inconsistent. The contact finger assembly 2 is fixed with the structural shell 1 through a confluence seat 2.2 by screws, and the stop pins 2.3 and the pressing plate 2.4 are respectively positioned at two ends of the confluence seat 2.2 and used for limiting the transverse floating amount of the contact finger sheet group 2.1. The stop pin 2.3 is screwed and inserted into the confluence seat 2.2, and the pressure plate 2.4 is fixed with the confluence seat 2.2 through screws at two sides.

When the number of the contact finger pieces in the contact finger piece group 2.1 is determined, a certain margin is required to be reserved according to the use working condition and the use environment, and in addition, the effective piece number is not counted because the head contact finger piece and the tail contact finger piece of the contact finger piece group 2.1 are not in sufficient electrical contact.

The inter-assembly bus bar 3 and the external bus bar 4 are connected to realize the current transmission of the contact finger assembly 2 and the external interface of the connector. Compared with a bus bar and a power cable formed by the bus bar 3 and the external bus bar 4 between the assemblies, the bus bar and the power cable have stronger unit section through-current capacity and smaller bending radius, and are optimized and arranged, so that the high-current connector is easier to realize compactness and miniaturization. The inter-component bus bar 3 and the external bus bar 4 can adjust the connection staggered angle thereof, the external interface form and the external length of the external bus bar 4 and the like according to the actual situation. After the connection is completed, the structural gaps of the inter-assembly bus bar 3 and the external bus bar 4 are filled with insulating glue 7 and leveled up, so that the insulating, sealing and protecting effects are achieved, as shown in fig. 4. In this embodiment, the insulating glue 7 is made of a material having good comprehensive properties such as temperature resistance, insulation, thermal conductivity, and economy, so as to reduce temperature rise, such as DC6020 silica gel and 3140 silica gel.

In order to achieve the purpose of reducing the temperature rise in the working process, the conduction resistance and the contact resistance need to be reduced as much as possible, the conduction resistance, the contact resistance and the like are reduced, in the embodiment, under the condition of considering the material cost, the processing manufacturability and the like, the bus bar seat 2.2, the inter-component bus bar 3 and the external bus bar 4 preferably adopt red copper, the mechanical connection among the bus bar seat 2.2, the inter-component bus bar 3 and the external bus bar 4 can be integrally processed and formed, and the contact resistance can be greatly reduced through the integral forming.

An example of an application scenario of the high-current connector shown in fig. 2: the high-current connector is fixed on a device 9, the connector socket 8 is fixed below an electronic device 11, the device 9 and the electronic device 11 are positioned by a positioning pin 10, the contact finger sheet set 2.1 is elastically deformed by pressure and is stably and effectively in elastic electric contact with the connector socket 8 and the bus bar seat 2.2 by end face pressure, the contact finger sheet set 2.1 is not limited by transverse and longitudinal tolerance amounts, only limited by axial tolerance amounts, the insertion and extraction force is extremely small, the axial tolerance amount is the distance delta from the upper end face 2.6 of the bus bar seat to the electric contact face 2.7 of the socket, and preferably, the delta is more than or equal to 0mm and less than or equal to 1.1 mm. When the device 9 and the electronic device 11 are fixed and positioned with respect to each other, and the axial tolerance delta conforms to the tolerance range, the high-current connector is inserted in place and works normally.

During operation, the current flow direction through the high-current connector is reversible, namely: the current is distributed to the contact finger assemblies 2 from the external bus bar 4 through the inter-assembly bus bar 3, and the current enters the connector socket 8 from the contact finger sheet group 2.1, so that the input of the current is completed; the current enters the contact finger piece group 2.1 from the connector socket 8, and the current is gathered to the external bus bar 4 through the inter-component bus bar 3 and enters the electronic equipment 11 connected with the external bus bar, so that the output of the current is completed.

Tests show that by adopting the high-current connector of the embodiment, the equivalent thermal resistance of the heat transfer path from the contact finger sheet group 2.1 to the equipment 9 is small, the temperature rise is low, and if the current carrying capacity of a single contact finger sheet is 90A, the maximum temperature rise of the high-current connector is reduced by 30 ℃.

While the principles of the invention have been described in detail in connection with the preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing embodiments are merely illustrative of exemplary implementations of the invention and are not limiting of the scope of the invention. The details of the embodiments are not to be interpreted as limiting the scope of the invention, and any obvious changes, such as equivalent alterations, simple substitutions and the like, based on the technical solution of the invention, can be interpreted without departing from the spirit and scope of the invention.

Claims

1. A large-current connector with a touch finger type end face in blind plugging is characterized by comprising a structural shell (1), touch finger assemblies (2), inter-assembly bus bars (3) and external bus bars (4);

the contact finger assembly (2) comprises a contact finger piece group (2.1) and a confluence seat (2.2), the contact finger piece group (2.1) can elastically deform after being pressed, the contact finger piece group (2.1) is positioned in the confluence seat (2.2), a plurality of contact finger assemblies (2) are closely arranged on the structural shell (1) through the confluence seat (2.2), and bus bars (3) among the assemblies are arranged on two sides of the confluence seat (2.2) at intervals up and down along the contact finger assemblies (2) and are respectively connected with the contact finger assemblies (2) with the same power supply type and polarity to respectively collect current; the external bus bars (4) on the side part of the structural shell (1) are respectively connected with the inter-assembly bus bars (3) in a staggered arrangement mode, and the contact finger assembly (2) is connected with an external interface of the high-current connector through the inter-assembly bus bars (3) and the external bus bars (4) to achieve current transmission; the busbar seat (2.2), the inter-assembly busbar (3) and the external busbar (4) are made of red copper respectively.

2. Contact finger type end face blind mate high current connector according to claim 1, characterized in that an insulating sheet (5) is placed on the structural shell (1), the contact finger assembly (2) is placed on the insulating sheet (5), the contact finger assembly (2) and the insulating sheet (5) are fixed on the structural shell (1) by screws, and the screw head is sleeved with an insulating sleeve (6).

3. Contact finger end face blind mate high current connector according to claim 2, characterised in that the insulating sheet (5) is SiC or AlN.

4. Contact finger end face blind mate high current connector according to claim 1, characterised in that the structural shell (1) has a recess (1.1) at the back, inside which recess (1.1) a heat conducting pad (1.2) is applied.

5. Contact finger end face blind mate high current connector according to claim 1, characterised in that the arrangement of a plurality of contact finger assemblies (2) on the structural housing (1) is of the linear, matrix or circular radiating array type.

6. The touch finger type end face blind-mating high-current connector according to claim 1, wherein the touch finger sheet set (2.1) is formed by sequentially laminating a plurality of touch finger sheets with the same power supply variety and polarity, the touch finger sheets are connected through the inter-assembly bus bar (3) to collect current, the bottoms of the touch finger sheets are clamped into the clamping grooves (2.5) in the bus bar seats (2.2), and the touch finger sheets can transversely float along the directions of the clamping grooves (2.5).

7. Contact finger type end face blind-mate high-current connector according to claim 6, wherein the contact finger assembly (2) further comprises a stop pin (2.3) and a pressure plate (2.4), the stop pin (2.3) and the pressure plate (2.4) are respectively located at two ends of the bus bar seat (2.2) and used for limiting the transverse floating amount of the contact finger sheet group (2.1).

8. Contact finger end face blind mate high current connector according to claim 6, characterised in that the busbar seat (2.2), the inter-assembly busbar (3) and the external busbar (4) are integrally formed.

9. Contact finger end face blind mate high current connector according to claim 6, characterised in that the high current connector is fixed on a device (9), a connector socket (8) is fixed under an electronic device (11), the device (9) and the electronic device (11) are positioned by means of positioning pins (10), the contact finger tab set (2.1) is in elastic electrical contact with the connector socket (8) and the busbar seat (2.2), there is an axial tolerance amount between the busbar seat upper end face (2.6) to the socket electrical contact face (2.7).

10. Contact finger end face blind mate high current connector according to claim 1, characterised in that the structural shell (1) is made of a high specific stiffness material.