CN214849204U - Charging plug with rapidly replaceable contact pins - Google Patents

Abstract

The utility model discloses a charging plug capable of rapidly replacing contact pins, which comprises a connecting seat, a jack, a needle sleeve and an end head, wherein the connecting seat is provided with a containing hole; the jack is arranged in the accommodating hole, a contact element is arranged inside the jack, and a variable-diameter binding element is sleeved outside the contact element; one end of the needle sleeve is inserted into the jack, and the outer wall of the needle sleeve is in top contact with the inner wall of the contact element; the end cover is arranged on the connecting seat, the end is provided with a limiting hole, the other end of the needle sleeve is inserted into the limiting hole, a limiting ring is arranged in the limiting hole, and the limiting ring is covered on the top of the jack in a pressing manner. The utility model provides a but charging plug of quick replacement contact pin, it is long when the mode through contact and the superimposed centre gripping of reducing binding will prolong its high stable electricity and connect the use, is showing the life who promotes charging plug.

Description

Charging plug with rapidly replaceable contact pins

Technical Field

The utility model relates to a charging connector technical field especially relates to a but charging plug of quick replacement contact pin.

Background

At present, a common large-current connection charging plug for an electric automobile on the market comprises a contact pin and a fixed base, wherein the contact pin comprises a contact pin contact part and a jack used for wrapping the contact pin contact part (a needle head or a needle sleeve), a contact element is arranged inside the jack, the contact part is inserted into the jack and fixed, and the contact part is in contact conduction with the contact element to realize electric connection. Wherein the other end of the jack is fixedly connected with the cable inside the plug fixing base.

Since the high-current connector used in the electric vehicle needs to have high-current load and durability, the conductivity, yield strength, and hardness (determining the wear resistance) of any material do not satisfy all requirements at the same time, and there is an upper limit in various material data. Therefore, after long-term use, the following problems occur: the effective conductive sectional area is reduced due to the abrasion of the jack contact piece (between the contact part and the contact piece) and the self plastic deformation; the main factors associated with the contact resistance R (Ω) are: a. effective conductor conducting distance L (m), b resistivity p (omega mm) of conductor²Effective conductive cross section area A (mm) of conductor²)。

The corresponding principle expression is as follows:

therefore, under the condition that other parameters are not changed, the effective conductive sectional area A is reduced, and the corresponding contact resistance R is relatively larger. When switching on heavy current, can produce great internal energy, lead to charging promptly and generate heat the rifle that causes and stop to fill or even relevant device or whole car burn out, so simple switching jack contact structure or adjustment jack contact material are difficult to satisfy the user to the long-time reliability of using of contact pin to and the demand of security.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a but charging plug of quick replacement contact pin, it is long when the use of extension high stable electricity is connected.

The utility model discloses a but technical scheme that charging plug of quick replacement contact pin adopted is:

a charging plug capable of quickly replacing contact pins comprises a connecting seat, a jack, a needle sleeve and an end head, wherein the connecting seat is provided with a plurality of accommodating holes; the jack is arranged in the accommodating hole, a contact element is arranged inside the jack, and a variable-diameter binding element is sleeved outside the contact element; one end of the needle sleeve is inserted into the jack, the outer wall of the needle sleeve is in top contact with the inner wall of the contact element, and the other end of the needle sleeve extends out of the connecting seat; the end cover is arranged on the connecting seat, the end is provided with a plurality of limiting holes, the other end of the needle sleeve is inserted into the limiting holes, limiting rings are arranged in the limiting holes, and the limiting rings are covered on the tops of the insertion holes in a pressing mode.

As a preferred scheme, one end of the jack is provided with a fixing hole; the connecting piece is attached to one end, away from the end socket, of the jack, and a through hole is formed in one end of the connecting piece; the locking piece sequentially penetrates through the through hole and the fixing hole and is in contact with the needle sleeve; the fastening screw rod penetrates through the needle sleeve and is connected with the locking piece in a matched mode.

Preferably, the aperture of the through hole is larger than that of the fixed hole; the locking part is of a three-layer annular table structure, a first layer and a second layer of the locking part are respectively embedded into the fixing hole and the through hole, the end face of the third layer of the locking part is in contact with the connecting part, the locking part is of a hollow structure, and the inner wall of the locking part is provided with an internal thread; the thread part of the fastening screw is screwed into the locking piece for internal thread fixation, and the nut part of the fastening screw and the third layer end face of the locking piece clamp the bottom of the jack and are locked by the connecting piece.

Preferably, a waterproof rubber ring is arranged between the nut part of the fastening screw and the other end of the needle sleeve.

According to a preferable scheme, the jack comprises a contact element, a reducing binding element and a first clamping cover, the contact element is a leaf spring, the leaf spring comprises a base and a plurality of elastic sheets, the fixing hole is arranged on a central axis of the base, the elastic sheets are vertically distributed around the base to form a containing groove, one end of the needle sleeve is arranged in the containing groove, an outward-protruding clamping block is arranged at the end part of each elastic sheet, each elastic sheet is provided with an inward-concave notch, the notches form an annular groove, and the annular groove is close to the clamping block; the reducing bundle is tightly sleeved in the annular groove; the first clamping cover is of a hollow structure, a fixed cavity is formed in the inner wall of one end of the first clamping cover, the first clamping cover is arranged on the leaf spring, the clamping block is clamped into the fixed cavity to be fixed, the inner wall of the other end of the first clamping cover is clamped into the annular groove, and a gap is reserved between the diameter-changing beam piece and the first clamping cover.

Preferably, the connector is one of a bonding wire connector or a pressing wire connector.

Preferably, the reducing member is one of a flat spring and a clockwork spring.

As a preferred scheme, the jack comprises a hole sleeve, a contact element, a reducing binding element and a second clamping cover, wherein an annular table is arranged on the inner wall of one end of the hole sleeve, a sinking groove is formed in the middle of the annular table, and the fixing hole is arranged on the axis of the sinking groove; the contact element is a torsion spring which is of a cylindrical structure, an inward-concave waist part is arranged in the middle of the torsion spring, the torsion spring is inserted into the hole sleeve, and one end of the torsion spring is in contact with the annular table; the reducing binding piece is tightly sleeved outside the waist-contracting part; the second card lid is hollow structure, the second card lid is located on the borehole jack other end, the second card lid top touches the torsional spring other end.

Preferably, the connector is one of a bonding wire connector or a pressing wire connector.

Preferably, the reducing member is one of a flat spring and a clockwork spring.

Preferably, the reducing bundle is a profile structure.

The utility model discloses a but charging plug of quick replacement contact pin's beneficial effect is: the connecting seat is provided with a plurality of accommodating holes. The jack is arranged in the accommodating hole, a contact element is arranged inside the jack, and a reducing bundle element is sleeved outside the contact element. One end of the needle sleeve is inserted into the jack, the outer wall of the needle sleeve is pressed against the inner wall of the contact element, and the other end of the needle sleeve extends out of the connecting seat. When the needle sleeve is inserted into the jack, the needle sleeve extrudes the inner wall of the contact element to deform, the inner diameter of the contact element is increased at the moment, and the diameter-variable beam element is expanded under stress; contact self restoring force orders about self shrink and presss from both sides tight needle cover, and reducing restraints self restoring force superposes on the contact simultaneously, promotes the fastness of centre gripping needle cover. The contact and the reducing beam overlapping clamping mode prolong the service life of the high-stability electric connection, and the service life of the charging plug is obviously prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a charging plug with a quickly replaceable contact pin according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a leaf spring type pin according to an embodiment of the present invention.

Fig. 3 is an exploded schematic view of a charging plug using a leaf spring type pin according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a leaf spring at a first viewing angle according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a leaf spring at a second viewing angle according to an embodiment of the present invention.

Fig. 6 is a schematic structural view of a spring bar according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a first card cover according to an embodiment of the present invention.

Fig. 8 is a schematic structural view of a needle cover according to an embodiment of the present invention.

Fig. 9 is a schematic view of a locking member according to an embodiment of the present invention.

Fig. 10 is a schematic structural diagram of a fastening screw according to an embodiment of the present invention.

Fig. 11 is a schematic view of a wire bonding connector according to an embodiment of the present invention.

Fig. 12 is a schematic structural diagram of a wire pressing connector according to an embodiment of the present invention.

Fig. 13 is a cross-sectional view of a flat spring type pin for use with a flat spring according to an embodiment of the present invention.

Fig. 14 is a cross-sectional view of a charging plug using a leaf spring type pin (flat spring) according to an embodiment of the present invention.

Fig. 15 is a schematic structural view of a second clockwork spring according to an embodiment of the present invention.

Fig. 16 is a cross-sectional view of a charging plug using a leaf spring type pin (a spiral spring) according to a second embodiment of the present invention.

Fig. 17 is a schematic structural diagram of a three-torsion spring type pin according to an embodiment of the present invention.

Fig. 18 is an exploded schematic view of a charging plug using a torsion spring type pin according to a third embodiment of the present invention.

Fig. 19 is a schematic structural view of a three-hole sleeve according to an embodiment of the present invention.

Fig. 20 is a schematic structural view of a third second card cover according to the embodiment of the present invention.

Fig. 21 is a cross-sectional view of a torsion spring type pin using a flat spring according to a third embodiment of the present invention.

Fig. 22 is a cross-sectional view of a charging plug employing a torsion spring type pin (flat spring) according to a third embodiment of the present invention.

Fig. 23 is a schematic structural view of a four-profiling flat spring according to an embodiment of the present invention.

Fig. 24 is a cross-sectional view of a charging plug of the fourth embodiment of the present invention in which torsion spring type pins (profiling flat springs) are used.

Fig. 25 is a cross-sectional view of a charging plug using a torsion spring type pin (a spiral spring) according to an embodiment of the present invention.

Fig. 26 is a schematic structural view of a six-copying clockwork spring according to an embodiment of the present invention.

Fig. 27 is a cross-sectional view of a charging plug using a torsion spring type pin (a copying clockwork spring) according to an embodiment of the present invention.

Detailed Description

The invention will be further elucidated and described with reference to the following embodiments and drawings in which:

the first embodiment is as follows:

referring to fig. 1 to 14, a charging plug with a quick replaceable pin includes a connecting base 70, a head 80, a pin 90, a connecting member 50a, a locking member 61 and a fastening screw 62.

The connecting base 70 is provided with a plurality of accommodating holes 71.

The insertion needle 90 of the present embodiment includes a receptacle 10a and a needle hub 40 disposed within the receptacle 10 a. Wherein the insertion hole 10a is placed in the receiving hole 71.

Specifically, the socket 10a of the present embodiment is a leaf spring type socket 10a, and the socket 10a includes a contact member, a variable diameter member 20, and a first cap 30 a. In this embodiment, the contact member is a leaf spring 11, and the diameter-changing member 20 is a flat spring 20 a.

Wherein the leaf spring 11 comprises a base 111 and a plurality of resilient tabs 112. The middle of the base 111 is provided with a fixing hole 12, a plurality of elastic sheets 112 are vertically arranged around the base 111 to form a containing groove 114, and the fixing hole 12 is arranged on the axis of the containing groove 114. The end of the elastic sheet 112 is provided with a first convex block 1121, the elastic sheet 112 is provided with an inner concave notch, the plurality of notches form an annular groove 113, the annular groove 113 is close to the first block 1121, the flat spring 20a is tightly sleeved in the annular groove 113, in this embodiment, the number of turns of the flat spring 20a ranges from 2 to 5 turns, the unwinding force in the range presents a better state, and the phenomenon that the number of turns is too large, so that deformation occurs in the assembling and inserting process and subsequent normal use is influenced is avoided. The first card cover 30a is a hollow structure, a fixing cavity 31 is formed in an inner wall of one end of the first card cover 30a, the first card cover 30a covers the leaf spring 11, the first clamping block 1121 is clamped into the fixing cavity 31 for fixing, and an inner wall of the other end of the first card cover 30a is clamped into the annular groove 113.

Preferably, the side wall of the first clamping cover 30a is provided with a plurality of slits 32, and when the first clamping cover 30a is pressed to cover the leaf spring 11, the deformation occurs, the caliber is enlarged, and the assembly difficulty is reduced.

The needle sheath 40 is a highly conductive cylinder, one end of the needle sheath 40 is inserted into the containing groove 114, and the outer wall of the needle sheath 40 is pressed against the inner wall of the leaf spring 11.

When the needle sheath 40 is inserted into the containing groove 114 of the jack 10a, the needle sheath 40 presses the inner wall of the leaf spring 11 to deform, at the moment, the inner diameter of the end part of the leaf spring 11 is increased, and the flat spring 20a is forced to unwind and expand the caliber; the elastic sheet 112 of the leaf spring 11 drives the end portion to contract and clamp the needle sleeve 40 by self restoring force, and meanwhile, the flat spring 20a is overlapped on the annular groove 113 of the leaf spring 11 by self restoring force, so that the end portion of the leaf spring 11 further contracts the caliber, and the firmness of clamping the needle sleeve 40 is improved. The way of the plate spring 11 and the flat spring 20a being clamped in an overlapping manner will prolong the service time of the highly stable electrical connection thereof, thereby significantly improving the service life of the pin 90.

In this embodiment, the leaf spring 11, the flat spring 20a and the needle sleeve 40 are made of a highly conductive material, preferably high beryllium copper, and the parts made of the material have the advantages of ensuring the requirement of high conductivity and good insertion and extraction performance.

The end head 80 is covered on the connecting seat 70, the end head 80 is provided with a plurality of limiting holes 81, and the other end of the needle sleeve 40 is inserted into the limiting holes 81, so that the other end of the needle sleeve 40 can be in contact conduction with the charging socket. Spacing hole 82 is still equipped with in the spacing hole 81, and spacing hole 82 gland is in jack 10a top for spacing jack 10a top, and the shrouding (this view is not shown) is arranged in connecting seat 70 and is kept away from end 80 one end, is used for spacing jack 10a bottom.

One end of the connecting piece 50a passes through the sealing plate and is attached to the outer wall of one end of the leaf spring 11, and the end is provided with a through hole 51; the other end of the connector 50a is connected to the conductive portion of the charging connector, so that a complete electrical path is realized. The locker 61 passes through the through-hole 51 and the fixing hole 12 in sequence and contacts the needle hub 40. The fastening screw 62 is connected with the retaining member 61 through the needle sleeve 40.

When the leaf spring 11 and the flat spring 20a are damaged and fail, firstly, the end head 80 is taken down to expose the fastening screw 62; the fastening screw rod 62 is disassembled along the middle of the jack 10a, the needle sleeve 40 is taken out randomly, and the flat spring 11 and the flat spring 20a are replaced correspondingly to complete maintenance of the inserting needle 90, so that the operation is convenient and fast, and meanwhile, the maintenance cost can be reduced.

Preferably, the aperture of the through hole 51 is larger than that of the fixing hole 12. Retaining member 61 is three-layer annular platform structure, and in retaining hole 12 and through-hole 51 were inlayed respectively to the first layer and the second floor of retaining member 61, the third layer terminal surface top of retaining member 61 touched connecting piece 50a, utilized the inlay location of retaining member 61 external structure, avoided leaf spring 11, connecting piece 50a to rock the skew after making the coaxial fixed of components of a whole that can function independently structure, guaranteed abundant contact to stabilize the heavy current transmission state. Retaining member 61 is hollow structure, and the retaining member 61 inner wall is equipped with the internal thread. The thread part of the fastening screw 62 is screwed into the internal thread of the locking member 61 for fixation, and the nut part of the fastening screw 62 and the third layer end face of the locking member 61 clamp the base 111 of the leaf spring 11 and are locked with the connecting member 50 a.

In the embodiment, the fastening screw 62 is made of high-temperature-resistant engineering plastics by an injection molding process, and the electric shock phenomenon caused by the mistaken touch of hands or conductive parts is prevented by utilizing the non-conductive property of the fastening screw. The nut portion of the fastening screw 62 is an arc-shaped table structure, which can provide a guiding function.

Preferably, a waterproof rubber ring 63 is disposed between the nut portion of the fastening screw 62 and the other end of the needle sleeve 40, so as to improve the sealing performance between the needle sleeve 40 and the nut portion of the fastening screw 62. Meanwhile, the inner and outer walls of the first card cover 30a are provided with sealing ribs 33, wherein the sealing ribs 33 on the inner wall of the first card cover 30a are used for improving the sealing performance between the first card cover 30a and the needle sleeve 40; the sealing ridge 33 of the outer wall of the first card cover 30a serves to improve the sealability between the first card cover 30a and the charging plug receiving hole 71. With the three above-mentioned seal structures, can prevent effectively that outside liquid from getting into contact pin 90 inside and influencing electrical connection.

Preferably, the connecting member 50a is a wire-bonding connecting member 50a in the present embodiment, and may be replaced with a wire-bonding connecting member 50 b. The user may use the bonding wire plate 52 of the bonding wire connector 50a to be fixed to the conductive end of the charging plug by welding, or the pressing wire fin 53 of the pressing wire connector 50b to be fixed to the conductive end of the charging plug by crimping, as required. Diversified connection modes can improve market competitiveness.

Example two:

referring to fig. 15 and 16, in the present embodiment, the flat spring 20a is replaced by the spring 20b in the first embodiment, and its own function is to generate driving force for reducing diameter, so that it can be perfectly applied to the annular groove 113. The optimum number of turns of the power spring 20b of this embodiment ranges from 2 to 4 turns.

Example three:

referring to fig. 17-22, in the present embodiment, the jack 10a is replaced with a torsion spring type jack 10b based on the first embodiment, and the jack 10b includes a sleeve 13, a contact member, a diameter-changing member 20 and a second snap cover 30 b. The contact member of the present embodiment is a torsion spring 14, and the diameter-changing member 20 is a flat spring 20 a.

An annular table 131 is arranged on the inner wall of one end of the hole sleeve 13, a sinking groove 132 is formed in the middle of the annular table 131, and a fixing hole 12 is formed in the center of the sinking groove 132. The outer wall of the other end of the hole sleeve 13 is provided with an annular clamping groove 133.

The torsion spring 14 is a cylinder structure, and the middle part of the torsion spring 14 is provided with an inward concave waist part. Specifically, the torsion spring 14 is a sheet metal structure in the initial stage, and a plurality of grids 141 are punched in the middle of the sheet metal through a punching process; randomly curling into a grid cylinder; finally, torsion springs 14 are formed at two ends of the grid cylinder in a twisting mode. When both ends of the torsion spring 14 are twisted, the bars are kept in a linear state (the whole bars are kept in a linear state except for slight twist), and therefore the plurality of bars 141 are wound to form a waisted structure. The torsion spring 14 is inserted into the hole sleeve 13, and one end of the torsion spring 14 is pressed against the annular table 131.

The flat spring 20a is tightly sleeved outside the waist-contracting portion.

The second cover 30b is a hollow structure, the second cover 30b is provided with an annular hook, the annular hook 34 is clamped into the annular clamping groove 133 for fixation, and the second cover 30b contacts the other end of the torsion spring 14.

The needle sleeve 40 is inserted into the sinking groove 132 of the hole sleeve 13 and fixed, the needle sleeve 40 extrudes the torsion spring 14 to shrink the waist part to deform, at the moment, the inner diameter of the waist part is increased, and the flat spring 20a is forced to unwind and expand the caliber; the self restoring force of the waist-contracting part of the torsion spring 14 drives the end part of the torsion spring to contract and clamp the needle sleeve 40, and meanwhile, the self restoring force of the flat spring 20a is superposed on the torsion spring 14, so that the end part of the leaf spring 11 further contracts the caliber, and the firmness of the clamping needle sleeve 40 is improved. The way of overlapping and clamping the torsion spring 14 and the flat spring 20a prolongs the service life of the high-stability electric connection, and obviously prolongs the service life.

In this embodiment, the hole sleeve 13, the torsion spring 14, the flat spring 20a and the needle sleeve 40 are made of a high-conductivity material, preferably high beryllium copper, and the parts made of the material have the advantages of ensuring the requirement of high conductivity and good insertion and extraction performance.

When the torsion spring 14 and the flat spring 20a are damaged and fail, the fastening screw 62 is disassembled and taken out from the inner part of the sinking groove 132, then the needle sleeve 40 is taken out, and finally the maintenance of the inserting needle 90 can be completed by correspondingly replacing the torsion spring 14 and the flat spring 20a, so that the operation is convenient and fast, and meanwhile, the maintenance cost can be reduced.

A plurality of second latches 1311 are provided on the annular table 131. The two ends of the torsion spring 14 are respectively provided with a plurality of bayonets 142, the bayonets 142 at the two ends of the torsion spring 14 are symmetrical to each other, and the second clamping blocks 1311 are clamped into the bayonets 142 at one end of the torsion spring 14 for fixation. The second clamping cover 30b is provided with a limit inner ring wall 35, the annular clamping hook 34 and the limit inner ring wall 35 are arranged on the same side of the second clamping cover 30b, the limit inner ring wall 35 is an inner ring, and the annular clamping hook 34 forms an outer ring. The outer wall of the limiting inner ring wall 35 is provided with a third clamping block 351, and the third clamping blocks 351 are clamped into the clamping holes 142 at the other end of the torsion spring 14 to be fixed. When the second clamping cover 30b is covered on the hole sleeve 13, the outer ring annular clamping hook 34 is clamped in the annular clamping groove 133 for fixation, the inner limiting ring wall 35 of the inner ring is inserted into the torsion spring 14, the end part of the torsion spring 14 is firmly pressed towards the inner wall of the hole sleeve 13, and the stability of electrical contact of the two is improved. The torsion spring 14 is locked inside the hole sleeve 13 by the second clamping block 1311 and the third clamping block 351, so that the torsion spring 14 is prevented from deflecting when the needle sleeve 40 is inserted, and the stability in the charging process is improved.

Preferably, at the same time, the inner and outer walls of the second cap 30b are provided with sealing ribs 33, wherein the sealing ribs 33 on the inner wall of the second cap 30b are used to improve the sealing performance between the second cap 30b and the needle sheath 40; the sealing rib 33 of the outer wall of the second card cover 30b serves to improve the sealability between the second card cover 30b and the charging plug receiving hole 71. The sealing structure can effectively prevent external liquid from entering the inserting needle 90 to influence the electrical connection.

Example four:

in the present embodiment, the flat spring 20a is designed as a profiling flat spring 20c which is waisted according to the waisted structure of the torsion spring 14 on the basis of the third embodiment, please refer to fig. 23 and 24. The profiling flat spring 20c is more attached to the outer wall of the waist of the torsion spring 14, the acting area is increased, the wrapping force of the profiling flat spring 20c is improved, and the action effect of the profiling flat spring 20c can be further enhanced.

Example five:

referring to fig. 15 and 25, in the present embodiment, the flat spring 20b is replaced by the spring 20b in the third embodiment, and the function of the flat spring is to generate the driving force for reducing, so that the flat spring can be perfectly applied to the waist-contracting portion of the torsion spring 14. The optimum number of turns of the power spring 20b of this embodiment ranges from 2 to 4 turns.

Example six:

in the present embodiment, the power spring 20b is designed as a profile power spring 20d that is waisted according to the waisted structure of the torsion spring 14 based on the fifth embodiment, please refer to fig. 26 and 27. The profiling clockwork spring 20d is more attached to the outer wall of the waist of the torsion spring 14, the acting area is increased, the wrapping force of the profiling clockwork spring 20d is improved, and the action effect of the profiling clockwork spring 20d can be further enhanced.

Example seven:

in the embodiment, the threaded connection structure of the locking member 61 and the fastening screw 62 is replaced by a buckle structure on the basis of the first embodiment, so that the locking and fixing structure is enriched, and the application of a user in different scenes is facilitated.

Example eight:

in the embodiment, the spring 20b is replaced by the C-shaped clamping piece or the sheet metal part with the round-covered stamping part on the basis of the second embodiment and the fifth embodiment, so that certain binding effects can be achieved on the leaf spring 11 and the torsion spring 14 of the two embodiments respectively, meanwhile, the production cost of the two embodiments can be reduced, and further the market competitiveness can be improved.

Example nine:

in the present embodiment, the detachable structure is replaced with the fixed connection structure on the basis of the first embodiment and the third embodiment. That is, in the first embodiment, the end of the leaf spring 11 is fixedly connected to the wire bonding connector 50a (or the wire pressing connector 50b) by welding, or in the third embodiment, the end of the hole sleeve 13 is fixedly connected to the wire bonding connector 50a (or the wire pressing connector 50b) by welding. The user can replace the welding form according to the requirement, and the ultrasonic welding is preferred in the embodiment.

The utility model provides a but charging plug of quick replacement contact pin, a plurality of holding holes have been seted up to the connecting seat. The jack is arranged in the accommodating hole, a contact element is arranged inside the jack, and a reducing bundle element is sleeved outside the contact element. One end of the needle sleeve is inserted into the jack, the outer wall of the needle sleeve is pressed against the inner wall of the contact element, and the other end of the needle sleeve extends out of the connecting seat. When the needle sleeve is inserted into the jack, the needle sleeve extrudes the inner wall of the contact element to deform, the inner diameter of the contact element is increased at the moment, and the diameter-variable beam element is expanded under stress; contact self restoring force orders about self shrink and presss from both sides tight needle cover, and reducing restraints self restoring force superposes on the contact simultaneously, promotes the fastness of centre gripping needle cover. The contact and the reducing beam overlapping clamping mode prolong the service life of the high-stability electric connection, and the service life of the charging plug is obviously prolonged.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A charging plug capable of quickly replacing contact pins is characterized by comprising a connecting seat, wherein the connecting seat is provided with a plurality of accommodating holes;

the jack is arranged in the accommodating hole, a contact element is arranged inside the jack, and a variable-diameter binding piece is sleeved outside the contact element;

one end of the needle sleeve is inserted into the jack, the outer wall of the needle sleeve is in top contact with the inner wall of the contact element, and the other end of the needle sleeve extends out of the connecting seat;

the end cover is arranged on the connecting seat, the end is provided with a plurality of limiting holes, the other end of the needle sleeve is inserted into the limiting holes, limiting rings are arranged in the limiting holes, and the limiting rings are covered on the tops of the insertion holes in a pressing mode.

2. The charging plug with fast replaceable pins as claimed in claim 1, wherein said socket has a fixing hole at one end;

the connector is attached to one end, away from the end socket, of the jack, and a through hole is formed in one end of the connector;

the locking piece sequentially penetrates through the through hole and the fixing hole and is in contact with the needle sleeve;

and the fastening screw rod penetrates through the needle sleeve and is connected with the locking piece in a matching way.

3. The charging plug with rapidly replaceable pins as claimed in claim 2, wherein the aperture of the through hole is larger than that of the fixing hole;

the locking part is of a three-layer annular table structure, a first layer and a second layer of the locking part are respectively embedded into the fixing hole and the through hole, the end face of the third layer of the locking part is in contact with the connecting part, the locking part is of a hollow structure, and the inner wall of the locking part is provided with an internal thread;

the thread part of the fastening screw is screwed into the locking piece for internal thread fixation, and the nut part of the fastening screw and the third layer end face of the locking piece clamp the bottom of the jack and are locked by the connecting piece.

4. The charging plug with the rapidly replaceable contact pins according to any one of claims 2 or 3, wherein the insertion hole comprises a contact element, the contact element is a leaf spring, the leaf spring comprises a base and a plurality of elastic sheets, the fixing hole is arranged on a central axis of the base, the plurality of elastic sheets are vertically arranged around the base to form a first accommodating groove, one end of the needle sleeve is arranged in the first accommodating groove, a convex clamping block is arranged at the end part of each elastic sheet, an inner concave notch is arranged on each elastic sheet, the notches form an annular groove, and the annular groove is close to the clamping block;

the reducing bundle piece is tightly sleeved in the annular groove;

the first clamping cover is of a hollow structure, a fixed cavity is formed in the inner wall of one end of the first clamping cover, the first clamping cover is arranged on the leaf spring, the clamping block is clamped into the fixed cavity to be fixed, the inner wall of the other end of the first clamping cover is clamped into the annular groove, and a gap is reserved between the variable-diameter beam piece and the first clamping cover.

5. The charging plug with quick replaceable pins of claim 4 wherein said connector is one of a wire bond connector or a wire crimp connector.

6. The charging plug with fast replaceable pins as claimed in claim 5, wherein the reducing member is one of a flat spring and a spiral spring.

7. The charging plug with the rapidly replaceable contact pins as claimed in any one of claims 2 or 3, wherein the insertion hole comprises a hole sleeve, an annular table is arranged on the inner wall of one end of the hole sleeve, a sunken groove is formed in the middle of the annular table, and the fixing hole is arranged on the axis of the sunken groove;

the contact element is a torsion spring which is of a cylindrical structure, an inward-concave waist part is arranged in the middle of the torsion spring, the torsion spring is inserted into the hole sleeve, and one end of the torsion spring is in contact with the annular table;

the reducing binding piece is tightly sleeved outside the waist-contracting part;

and the second clamping cover is of a hollow structure, the second clamping cover is arranged on the other end of the hole sleeve, and the second clamping cover abuts against the other end of the torsion spring.

8. The quick change pin charging plug of claim 7 wherein the connector is one of a wire bond connector or a wire crimp connector.

9. The charging plug with quick replaceable pins as claimed in claim 8, wherein the reducing member is one of a flat spring and a spiral spring.

10. The charging plug with quick replaceable pins as claimed in claim 9, wherein said reducing collar is a contoured configuration.

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