CN106848695B

CN106848695B - Power supply connector

Info

Publication number: CN106848695B
Application number: CN201610996825.2A
Authority: CN
Inventors: 游万益; 郑义宏; 刘瑞红; 杨琇棉
Original assignee: Alltop Electronics Suzhou Co Ltd; Alltop Technology Co Ltd
Current assignee: Alltop Electronics Suzhou Co Ltd; Alltop Technology Co Ltd
Priority date: 2016-11-09
Filing date: 2016-11-09
Publication date: 2020-05-12
Anticipated expiration: 2036-11-09
Also published as: CN106848695A

Abstract

The invention provides a power connector which comprises an insulating body, a plurality of power terminals, a terminal confluence piece and a parallel fastener, wherein the power terminals are fixed on the insulating body side by side along the transverse direction, the terminal confluence piece is electrically connected with the power terminals, the parallel fastener mechanically and electrically connects the terminal confluence piece with a leading-out terminal arranged on the rear side of the insulating body into a whole, the terminal confluence piece is provided with a main body part matched with the power terminals and connecting pieces arranged at intervals along the front and rear directions with the main body part, an accommodating space for accommodating the parallel fastener is formed between the main body part and the connecting pieces, and the accommodating space is outwards opened only along one direction of the transverse direction and the height direction of the power connector. The terminal bus sheet of the power connector is opened outwards only along one of the transverse direction and the height direction, and the parallel fasteners are effectively prevented from falling off and the terminal bus sheet is prevented from being broken.

Description

Power supply connector

Technical Field

The present invention relates to a power connector, and more particularly, to a power connector having a terminal bus bar with high structural strength and capable of preventing a parallel fastener from dropping.

Background

The power connector is a conventional electrical connector, and is mainly used for transmitting current. The existing power connector usually includes several or a single power terminal and an insulating base for carrying the power terminal to perform an insulating process around the power terminal. The plurality of power terminals can be connected in parallel through the terminal bus bar to provide large current transmission.

Taiwan patent publication No. 201405977, which was published in 2/1/2014, discloses a power connector, in which a terminal bus bar and a parallel fastener are connected in parallel to a plurality of power terminals by a plurality of screws and nuts, however, the terminal bus bar has a multi-directional open receiving space for a positioning nut to be placed in, and when a second side wall of the terminal bus bar is pulled by an external force, the terminal bus bar is opened outward so that the positioning nut falls off or the terminal bus bar is broken; before the screw is locked, the positioning nut risks falling out, and after the screw is locked, when the conducting strip and the cable need to be assembled, the screw needs to be disassembled, and meanwhile, the risk that the positioning nut falls out exists.

In view of the above, there is a need for an improved power connector to solve the above problems.

Disclosure of Invention

The invention aims to provide a power connector with a terminal confluence sheet which has high structural strength and can prevent a parallel fastener from falling.

In order to achieve the above object, the present invention provides a power connector, which includes an insulating housing, a plurality of power terminals fixed on the insulating housing side by side along a transverse direction, a terminal bus bar electrically connected to the power terminals, and a parallel fastener, wherein the parallel fastener mechanically and electrically connects the terminal bus bar and a lead-out terminal disposed at a rear side of the insulating housing, the terminal bus bar has a main body portion matched with the power terminals and a connecting piece spaced from the main body portion along a front-rear direction, a receiving space for receiving the parallel fastener is formed between the main body portion and the connecting piece, the receiving space is open outward along only one of the transverse direction and the height direction of the power connector, and after the parallel fastener is mounted in the receiving space of the terminal bus bar, four sides of the parallel fastener are wrapped by the terminal bus bar, The other two sides are limited by the terminal bus sheet to avoid falling from the accommodating space before the leading-out terminal is locked.

As a further improvement of the invention, the terminal bus bar further comprises a bridge portion integrally connected with the main body portion and the lower end of the connecting piece, the main body portion comprises a butt-joint portion fixed with the power terminal and a limiting portion positioned in front of the parallel connection fastener, the bridge portion extends forwards from the lower end of the connecting piece to be connected with the lower end of the limiting portion, and the accommodating space is formed by the limiting portion, the bridge portion and the connecting piece in a surrounding mode.

As a further improvement of the invention, the upper end of the connecting piece is bent and extended towards the main body part to form a blocking part, and the blocking part and the bridge part are oppositely arranged at intervals along the height direction of the power connector.

As a further improvement of the present invention, the limiting portion is integrally formed extending downward from a lower end of the abutting portion.

As a further improvement of the invention, the blocking part extends forwards from the upper end of the connecting sheet to the main body part, the main body part is provided with at least one combining hole, the free tail end of the blocking part forms at least one buckling part, and the buckling part is inserted forwards into the combining hole and is bent downwards in front of the main body part to form a reverse buckle.

As a further improvement of the invention, the stopping part is a plurality of limiting sheets extending forwards from the upper end of the connecting sheet.

As a further improvement of the present invention, the connecting piece is bent forward and extended forward along two sides in the transverse direction to form a first engaging portion, the limiting portion is bent backward and extended rearward along two sides in the transverse direction to form a second engaging portion, and the first engaging portion and the second engaging portion are engaged with the dovetail flange through a dovetail groove formed at the free end of the first engaging portion and the second engaging portion.

As a further improvement of the invention, the stopping part is integrally connected with the abutting part and the connecting piece, and a gap is formed between the limiting part and the abutting part.

As a further development of the invention, the limiting section has a positioning projection projecting toward the connecting piece and/or a spring formed by tearing after the parallel connection fastener is installed.

As a further improvement of the present invention, the insulation body is correspondingly provided with a placement groove for accommodating the bridge portion, and two sides of the bridge portion in the transverse direction are respectively provided with barbs in interference fit with the placement groove.

The terminal bus sheet of the power connector is opened outwards only along one of the transverse direction and the height direction, and the parallel fasteners are effectively prevented from falling off and the terminal bus sheet is prevented from being broken.

Drawings

Fig. 1 is a perspective view of a first embodiment of the power connector of the present invention.

Fig. 2 is a view of the power connector of fig. 1 from another perspective.

Fig. 3 is a partially exploded view of the power connector shown in fig. 1.

Fig. 4 is a view of the power connector of fig. 3 from another perspective.

Fig. 5 is an exploded view of the third power terminal set, the terminal bus bar, and the parallel fastener of the power connector shown in fig. 3.

Fig. 6 is an assembly schematic of the terminal bus bar and the parallel fastener of fig. 5.

Fig. 7 is a view of the terminal bus bar and the parallel fastener of fig. 6 from another perspective.

Fig. 8 is a perspective view of the terminal bus bar of fig. 5.

Fig. 9 is a view of the terminal bus bar of fig. 8 from another perspective.

Fig. 10 is a perspective view of a second embodiment of the power connector of the present invention.

Fig. 11 is an assembly view of the terminal bus bar and the parallel fastener of fig. 10.

Fig. 12 is a perspective view of the terminal bus bar of fig. 10 shown without the parallel fastener installed therein.

Fig. 13 is a partially exploded view of a third embodiment of the power connector of the present invention.

Fig. 14 is an assembly schematic of the terminal bus bar and the parallel fastener of fig. 13.

Fig. 15 is a perspective view of the terminal bus bar of fig. 14.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 9, a power connector 100 according to a first embodiment of the present invention is shown, wherein the power connector 100 includes an insulating housing 1, power terminals 2 and signal terminals 3 fixed in the insulating housing 1, a terminal bus bar 4 electrically connected to a plurality of the power terminals 2, and a parallel fastening member 5 mechanically and electrically connecting the terminal bus bar 4 and a lead-out terminal (not shown) disposed at the rear side of the insulating housing 1.

As shown in fig. 2 to 4, the insulating housing 1 includes a base 11, an extending portion 12 extending backward from the base 11 along a plugging direction with a mating connector (not shown), and two guide posts 13 located at two lateral sides of a front portion of the base 11, wherein the guide posts 13 are used for guiding the plugging of the mating connector.

The base 11 is provided with a mating face 110 on the front side for mating with a mating connector, a mounting face 111 on the rear side, and a plurality of terminal receiving grooves 112 penetrating the mating face 110 and the mounting face 111 in the front-rear direction. In the present invention, the terminal receiving grooves 112 include a plurality of power terminal receiving grooves 1121 and a plurality of signal terminal receiving grooves 1122. The power terminal accommodating grooves 1121 are arranged in a lateral direction of the insulating housing 1, and the signal terminal accommodating grooves 1122 are located on one side of the power terminal accommodating grooves 1121. The two sides of the front portion of each power terminal receiving groove 1121 are provided with a limiting block 1123 protruding towards the inside thereof. The extension portion 12 includes a bottom wall 121 extending rearward from the bottom of the base portion 11 and a plurality of partitions 122 extending rearward from the mounting surface 111, wherein the bottom wall 121 is connected to the partitions 122.

Referring to fig. 1 to fig. 5, the power terminals 2 are oppositely disposed in each power terminal receiving slot 1121 in pairs, and the power connector 100 of the present invention has seventeen pairs of power terminals 2, which are correspondingly disposed in the seventeen power terminal receiving slots 1121. The pair of power terminals 2 in each power terminal accommodating groove 1121 are referred to as a first terminal 21 and a second terminal 22, respectively, in the present invention. In each pair of the power terminals 2, the first terminal 21 and the second terminal 22 are provided with contact pieces 23 arranged in a plate-like manner to face each other, and support portions 24 located at rear ends of the contact pieces 23 and extending from the contact pieces 23 so as to be bent toward each other. The pair of contact pieces 23 of the pair of power terminals 2 are commonly accommodated in the same power terminal accommodating groove 1121, and each contact piece 23 is provided with a holding piece 231 extending outward from the upper and lower sides. The front end of the contact piece 23 abuts against the rear side of the limit block 1123 to limit the forward movement of the power terminal 2.

In the invention, seventeen pairs of the power terminals 2 are divided into three terminal groups, namely a first power terminal group, a second power terminal group and a plurality of third power terminal groups, wherein in the three terminal groups, the power terminal 2 in the first power terminal group and the power terminals 2 in the second and third power terminal groups are different in structural arrangement, and certainly, can also be arranged in the same structure; the structural arrangement of each pair of power terminals 2 in the second power terminal group and the third power terminal group is the same, and therefore, only the structure of each pair of power terminals 2 in the third power terminal group of the two will be described in detail later. The first power supply terminal group and the second power supply terminal group both comprise four pairs of power supply terminals 2, and the third power supply terminal group comprises three pairs of power supply terminals 2.

Referring to fig. 3 to fig. 5, in order to increase the current transmission of the power connector 100 of the present invention, the second power terminal set and each third power terminal set are connected in parallel through one terminal bus bar 4 and then connected to an external lead-out terminal. By way of example, referring to fig. 5, each pair of power terminals 2 in the third power terminal group is further provided with a solder tail 25 bent and extended backward from the supporting portion 24.

In the first embodiment of the present invention, the terminal bus bar 4 has a main body 41 that is engaged with the power supply terminal, a connecting piece 42 that is spaced apart from the main body 41 in the front-rear direction, and a bridging portion 43 that is integrally connected to both the lower ends of the main body 41 and the connecting piece 42, a receiving space 40 that receives the parallel fastening member 5 is formed between the main body 41 and the connecting piece 42, and the receiving space 40 is open outward only in the lateral direction of the power supply connector 100. The main body portion 41 and the connecting piece 42 are parallel to each other in the height direction of the power connector 100, and the height of the main body portion 41 extending in the direction away from the bridging portion 43 is greater than the extending height of the connecting piece 42. The bridge 43 abuts against the bottom wall 121 of the extension 12.

The main body 41 includes a mating portion 411 fixed to the power terminal 2, a limiting portion 412 located in front of the parallel fastening member, and a welding hole 413 provided in the mating portion 411, and the limiting portion 412 is integrally formed by extending downward from a lower end of the mating portion 411. The butt-joint portion 411 is electrically connected to the solder tail 25 of the power terminal 2, and the connecting piece 42 is used for connecting the lead-out terminal. The main body 41 is provided with a plurality of coupling holes 414 at the boundary between the abutting portion 411 and the limiting portion 412, and in other embodiments, the number of the coupling holes 414 may be only one.

The bridging portion 43 extends forward from the lower end of the connecting piece 42 to be connected with the lower end of the limiting portion 412, and the accommodating space 40 is formed by the limiting portion 412, the bridging portion 43 and the connecting piece 42 which are commonly surrounded. The upper end of the connecting piece 42 is bent and extended toward the main body 41 to form a blocking portion 44, and the blocking portion 44 and the bridging portion 43 are parallel to each other and are arranged at an interval along the height direction of the power connector 100. The blocking portion 44 extends forward from the upper end of the connecting piece 42 to the main body 41, the free end of the blocking portion 44 forms at least one buckling portion 441, and the buckling portion 441 is inserted forward into the combining hole 414 and is bent downward in front of the main body 41 to form a reverse buckling.

The restricting portion 412 has a positioning protrusion 4121 protruding toward the connecting piece 42 and a resilient piece 4122 formed by tearing after the parallel fastener 5 is installed, since the receiving space 40 is opened outward only in the lateral direction of the power connector 100, the parallel fastener 5 is placed therein from one side of the receiving space 40 in the lateral direction, the positioning protrusion 4121 restricts the receiving space 40 from the other side thereof to prevent the parallel fastener 5 from being excessively inserted, the restricting portion 412 is torn to form the resilient piece 4122 after the parallel fastener 5 is installed, the resilient piece 4122 and the positioning protrusion 4121 are located on opposite sides of the parallel fastener 5 in the lateral direction to laterally position the parallel fastener 5 therein, and the blocking portion 44 is torn downward to form at least one tongue piece 442 and is held downward against the upper surface of the parallel fastener 5. The terminal bus bar 4 wraps the four sides of the parallel fastener 5, and then the terminal bus bar 4 is placed on the bottom wall 121 and welded to the corresponding solder tail 25.

When the power connector 100 is subjected to an external pulling force, since the connecting piece 42 is connected with the main body portion 41 and the bridging portion 43, an external force acting on the connecting piece 42 is borne by the whole terminal bus piece 4, and the single-side stress is avoided, the connecting piece 42 cannot be opened outwards, and the risk that the parallel fastener 5 falls off and the terminal bus piece 4 is broken due to the fact that the connecting piece 42 is opened outwards is avoided. Before the screws (not shown) are locked to the parallel fastening member 5 and the terminal bus bar 4, the four sides of the parallel fastening member 5 are all covered by the terminal bus bar, and the other two sides are limited by the positioning protrusions 4121 and the resilient pieces 4122, so that the risk of falling is avoided.

Connecting the third power supply terminal group with the terminal bus bar 4 is set as follows: the terminal 25 of each power terminal 2 in the third power terminal group is inserted into the welding hole 413 of the terminal bus bar 4, and the abutting portion 411 and the terminal 25 are electrically connected to each other by soldering.

The support portion 24 of each power terminal 2 in the third power terminal group is parallel to the main body portion 41 of the terminal bus bar 4; in each pair of power terminals 2 of the third power terminal group, the support portions 24 of the first and second terminals 21 and 22 are located on the same plane and are both disposed in contact with the main body portion 41. The solder tails 25 of the first terminal 21 and the second terminal 22 are bent from the end of the support portion 24 close to each other, and are parallel to each other and arranged in a surface abutting manner, so that the solder tails 25 of each pair of power terminals 2 are butted with each other to form a straight line shape as a whole, and share the solder hole 413 on one terminal convection sheet 4. The solder tail 25 is disposed perpendicular to the main body portion 41 and is accommodated in the solder hole 413.

Referring to fig. 10 to 12, as a second embodiment of the present invention, the structure and the assembly relationship of the insulating body 1', the power terminal 2', the signal terminal 3' and the parallel fastener 5' of the power connector 100' are the same as those of the first embodiment, and will not be described again. The difference from the first embodiment described above is only that: the receiving space 40' is only open outwards along the height direction of the power connector 100', wherein the blocking portions 44' of the terminal bus bar 4' are a plurality of limiting pieces extending from the upper end of the connecting piece 42', and two sides of the connecting piece 42' along the transverse direction are respectively bent forwards and extended to form first buckling portions 421', two sides of the limiting portions 412' along the transverse direction are respectively bent backwards and extended to form second buckling portions 4123', and the first buckling portions 421' and the second buckling portions 4123' are mutually embedded with the dovetail flanges through dovetail grooves formed at the free ends of the first buckling portions 421' and the second buckling portions 4123 '. The limiting portion 412' is provided with a pair of positioning protrusions 4121' at intervals along the transverse direction of the power connector 100' for clamping the parallel fastening member 5' between the main body portion 41' and the connecting piece 42', and the positioning protrusions 4121' may be configured as ribs, bumps, torn resilient pieces, or a combination of any two of the above.

Before the parallel fastener 5' is put in, the extending direction of the blocking part 44' is the same as the extending direction of the connecting piece 42', and after the parallel fastener 5' is put into the accommodating space 40' from top to bottom, the blocking part 44' is bent forwards to be resisted above the parallel fastener 5 '. The body portion 41' is further provided with at least one wedge 415', which wedge 415' is also located on the upper side of the parallel fastener 5' to limit it in a forward position above the parallel fastener 5 '.

In this embodiment, the connecting piece 42 'is directly connected to the bridging portion 43' and is connected to the main body portion 41 'through the first and second fastening portions 421' and 4123', so that the risk of dropping the parallel fastening member 5' and breaking the terminal bus bar 4 'caused by the outward expansion of the connecting piece 42' can be avoided. In addition, before the screws are locked to the parallel fastening pieces 5 'and the terminal bus bar 4', the parallel fastening pieces 5 'are wrapped on the respective sides by the terminal bus bar 4' without risk of falling.

Referring to fig. 13 to 15, a third embodiment of the invention is shown, in which the structures of the insulation body 1 ", the power terminal 2", the signal terminal 3 "and the parallel fastener 5" of the power connector 100 "are the same as those of the first embodiment, and are not repeated herein. The receiving space 40 "of the terminal bus bar 4" is also open outward only in the lateral direction of the power connector 100 ", and differs from the first embodiment only in that: the blocking portion 44 "is integrally connected with the abutting portion 411" and the connecting piece 42 ", and a gap is formed between the limiting portion 412" and the abutting portion 411 ". That is, in this embodiment, the terminal bus bar 4 ″ is formed by bending a sheet-like structure for multiple times, and the specific forming manner is: the blocking portion 44 is formed by bending and extending from the bottom of the abutting portion 411 'backwards, the connecting portion 42 is formed by bending and extending from the rear end of the blocking portion 44' downwards, the bridging portion 43 is formed by bending and extending from the lower end of the connecting portion 42 'forwards, the limiting portion 412 is formed by bending and extending from the front end of the bridging portion 43' upwards, and no direct connection is formed between the limiting portion 412 'and the abutting portion 411' and a gap is reserved. The design of the positioning protrusions 4121 and the resilient pieces 4122 on the restricting portion 412 "is also the same as that in the first embodiment.

Referring to fig. 13, in a third embodiment of the present invention, the insulation body 1 "is correspondingly provided with a placement groove 123" for accommodating the bridge portion 43 ", and two sides of the bridge portion 43" along the transverse direction are respectively provided with barbs 431 "in interference fit with the placement groove 123", in the present embodiment, the placement groove 123 "is arranged in a T shape. In the first embodiment of the present invention, the insulation body 1 may also be provided with a placement groove for receiving the bridge portion 43, and two sides of the bridge portion in the transverse direction are respectively provided with barbs that are in interference fit with the placement groove.

In the third embodiment, the connecting piece 42 "is directly connected with the bridging portion 43" and the bridging portion 43 "is received in the receiving groove 123" in an interference manner, and in addition, the blocking portion 44 "is integrally connected with the abutting portion 411", so that the risk that the parallel fastening piece 5 "falls off and the terminal confluence piece 4" is broken due to the outward expansion of the connecting piece 42 "can be avoided. In addition, before the screw is locked and attached to the parallel connection fastener 5 "and the terminal confluence plate 4", four sides of the parallel connection fastener 5 "are all wrapped by the terminal confluence plate 4", and the other two sides are limited by the positioning protrusions 4121 "and the elastic sheets 4122", so that the risk of falling is avoided.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims

1. A power connector comprises an insulating body, a plurality of power terminals which are fixed on the insulating body side by side along the transverse direction, a terminal bus sheet which is electrically connected with the power terminals, and a parallel fastener, wherein the parallel fastener mechanically and electrically connects the terminal bus sheet and a leading-out terminal arranged at the rear side of the insulating body into a whole, and is characterized in that: the terminal confluence piece is provided with a main body part matched with the power terminal and connecting pieces arranged at intervals along the front-back direction with the main body part, an accommodating space for accommodating a parallel fastener is formed between the main body part and the connecting pieces, the accommodating space is outwards opened only along one direction of the transverse direction and the height direction of the power connector, after the parallel fastener is installed in the accommodating space of the terminal confluence piece, four sides of the parallel fastener are all wrapped by the terminal confluence piece, and the other two sides of the parallel fastener are limited by the terminal confluence piece so as to avoid falling from the accommodating space before the terminal is led out to be locked.

2. The power connector of claim 1, wherein: the terminal confluence piece is further provided with a bridging part integrally connected with the lower end of the main body part and the lower end of the connecting piece, the main body part comprises a butt joint part fixed with a power terminal and a limiting part located in front of the parallel connection fastener, the bridging part extends forwards from the lower end of the connecting piece to be connected with the lower end of the limiting part, and the accommodating space is formed by the limiting part, the bridging part and the connecting piece in a surrounding mode.

3. The power connector of claim 2, wherein: the upper end of the connecting sheet is bent and extended towards the main body part to form a blocking part, and the blocking part and the bridging part are arranged at intervals relatively along the height direction of the power connector.

4. A power connector as claimed in claim 3, wherein: the limiting part is integrally formed by extending downwards from the lower end of the butting part.

5. The power connector of claim 4, wherein: the blocking part extends forwards from the upper end of the connecting piece to the main body part, at least one combining hole is formed in the main body part, at least one buckling part is formed at the free tail end of the blocking part, and the buckling part is inserted forwards into the combining hole and is bent downwards in front of the main body part to form a reverse buckle.

6. The power connector of claim 4, wherein: the blocking part is a plurality of limiting pieces extending forwards from the upper end of the connecting piece.

7. The power connector of claim 6, wherein: the connecting piece is bent forward respectively along the ascending both sides in transverse direction and is extended first buckling parts, the restriction portion is bent backward respectively along the ascending both sides in transverse direction and is extended formation second buckling parts, first buckling parts and second buckling parts are through the dovetail groove and the mutual gomphosis of forked tail flange that its free end set up.

8. A power connector as claimed in claim 3, wherein: the blocking portion, the butt joint portion and the connecting piece are integrally connected, and a gap is formed between the limiting portion and the butt joint portion.

9. A power connector as claimed in any one of claims 2 to 8, wherein: the limiting part is provided with a positioning projection protruding towards the connecting piece and/or a spring sheet formed by tearing after the parallel connection fastener is installed.

10. A supply connector as claimed in any one of claims 2 to 7, wherein: the insulation body is correspondingly provided with a placement groove for accommodating the bridge part, and barbs which are in interference fit with the placement groove are respectively arranged on two sides of the bridge part in the transverse direction.