CN215955529U

CN215955529U - Plug bush

Info

Publication number: CN215955529U
Application number: CN202121507586.2U
Authority: CN
Inventors: 张楚凡
Original assignee: Nanjing Kangni New Energy Auto Parts Co ltd
Current assignee: Nanjing Kangni New Energy Auto Parts Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2022-03-04
Anticipated expiration: 2031-07-02

Abstract

The utility model discloses a plug bush which comprises a base and a butt joint part arranged on one side of the base, wherein the butt joint part is provided with a through groove, the through groove penetrates through the inner side and the outer side of the butt joint part, the through groove penetrates through the whole butt joint part along the extension direction of the butt joint part, the butt joint part is at least provided with two through grooves, the cross section area of one end, close to the base, of the butt joint part is larger than that of the other end of the butt joint part, and the cross section area of the butt joint part changes linearly along the extension direction. The butt joint part adopts the variable cross section, so that the contact pin is not easy to deform and concentrate stress when inserted, fatigue damage is avoided, and the variable cross section is adopted to ensure that the volume is not changed, so that the resistance is not changed, and the current carrying capacity is ensured. The wall thickness of the socket opening is thinner, so that the insertion force of the insertion needle during insertion is reduced, and the condition of insertion and extraction abrasion is reduced. Because the wall thickness is thin at the top and thick at the bottom, the bending deformation of the butt joint part deviates to the thin upper end, the deformation of the root part is reduced, the stress value in the region of the root part with stress concentration is correspondingly reduced, and the fatigue life of the plug bush is prolonged.

Description

Plug bush

Technical Field

The utility model relates to a charging interface, in particular to a plug bush.

Background

The charge and discharge module is an important component of the new energy automobile, and the electric contact pair is the core of the charge and discharge module. The current common electrical contact pairs can be roughly divided into spring contact pairs and slotted contact pairs in terms of contact types, wherein the spring contact pairs generally comprise pins, sockets and springs matched with the sockets, the current paths of the pins are pin-spring-sockets, two electrical contact surfaces exist in the middle of the pins, compared with the slotted contact pairs only comprising the pins and the slotted sockets, the current paths of the slotted contact pairs are directly pin-sockets, and only one electrical contact surface exists in the middle of the pins and the slotted sockets, so that the overall resistance is smaller, the current carrying capacity is stronger, but the elastic wall thickness of the slotted sockets is thicker, and the elastic performance of the materials is weaker than that of spring materials in general, so that larger insertion and extraction wear exists in the use process, and contact looseness easily occurs. If the abrasion of plugging and unplugging is reduced, namely the positive pressure of the elastic wall of the plug bush on the plug pin is reduced, the thickness of the elastic wall can be reduced or the size of the plug bush insertion opening can be increased, but the two modes can cause the loss of current carrying capacity caused by electric contact and aggravate the contact relaxation condition.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: aiming at the defects, the utility model provides the plug bush which can improve the abrasion and contact looseness of the electric contact on the premise of ensuring the current-carrying capacity and prolong the plugging service life.

The technical scheme is as follows: in order to solve the problems, the utility model adopts an insert sleeve which comprises a base and an abutting part arranged on one side of the base, wherein the abutting part is provided with a through groove, the through groove penetrates through the inner side and the outer side of the abutting part, the through groove penetrates through the whole abutting part along the extending direction of the abutting part, the abutting part is provided with at least two through grooves, the cross section area of one end, close to the base, of the abutting part is larger than that of the other end, and the cross section area of the abutting part changes linearly along the extending direction.

Has the advantages that: compared with the prior art, the utility model has the advantages that: 1. the thickness of reasonable design butt joint portion, its thickness top-down evenly increases, and even structure makes the contact pin insert difficult emergence stress concentration when butt joint portion warp, leads to appearing fatigue damage in the middle of the butt joint portion, and the butt joint portion adopts the variable cross section to set up and does not reduce the volume for plug bush bulk resistance is unchangeable, has guaranteed higher current-carrying capacity. 2. The wall thickness of the socket opening is thinner, so that the insertion force of the insertion needle during insertion is reduced, and the condition of insertion and extraction abrasion is reduced. 3. When the plug pin is inserted, the wall thickness is thin at the top and thick at the bottom, so that the bending deformation of the butt joint part which is originally bent uniformly deviates to the thinner upper end, the deformation of the root part is reduced, the stress value in the region of the root part with stress concentration is correspondingly reduced, and the fatigue life of the plug bush is prolonged.

Furthermore, the width of the through groove close to one end of the base is larger than that of the other end of the base, and the width of the through groove changes linearly along the extending direction.

Furthermore, the butt joint part is ring-shaped, the diameter of the outer ring of the butt joint part close to one end of the base is larger than that of the outer ring of the other end of the base, and the diameter of the outer ring of the butt joint part changes linearly along the extension direction.

Further, still include spacing cap, spacing cap is connected in the one end that the base was kept away from to the butt joint portion, lead to the groove and run through spacing cap inside and outside, and run through spacing cap both ends, spacing cap is ring shape, and spacing cap outer lane diameter is greater than the outer lane diameter that base one end was kept away from to the butt joint portion, and spacing cap is the same with the inner circle diameter between them that the junction was connected to the butt joint portion.

Furthermore, the diameter of the inner ring of one end, close to the butt joint part, of the limiting cap is smaller than that of the inner ring of the other end of the limiting cap, and the change range of the diameter of the inner ring of the limiting cap is gradually increased along the extension direction.

Furthermore, one side of the base, which is far away from the butt joint part, is connected with a circular ring-shaped crimping barrel.

Furthermore, the limiting cap, the butt joint part, the base and the crimping barrel are integrally machined and integrally formed.

Furthermore, the limiting cap, the butt joint part, the base and the crimping barrel are made of copper alloy materials.

Drawings

FIG. 1 is an overall block diagram of the insert of the present invention;

fig. 2 is a cross-sectional view of the insert of the present invention.

Detailed Description

As shown in fig. 1 and fig. 2, the plug bush of the present embodiment includes a limiting cap 1, a butt-joint portion 2, a base 3, and a press-connection barrel 4, and the use method of the plug bush of the present embodiment is the same as that of a common plug bush, after a mating pin is inserted into the plug bush, the pin contacts with the inside of a spring wall of the plug bush to form an electrical path, so as to transmit electric energy.

The limiting cap 1, the butt joint part 2, the base 3 and the crimping barrel 4 are integrally machined and integrally formed, copper alloy materials are adopted, the butt joint part 2 is connected to the side of the base 3, the crimping barrel 4 is connected to the other side of the base, the crimping barrel 4 is connected to a circuit of a charging and discharging module, when electric contact pairs are electrically connected, a contact pin is inserted into the butt joint part 2 of the plug bush, the butt joint part 2 is annular, the diameter of the outer ring of one end, close to the base 3, of the butt joint part 2 is larger than that of the outer ring of one end, close to the limiting cap 1, and the diameter of the outer ring changes linearly along the extending direction. The butt joint part 2 is provided with a through groove 21, the through groove 21 penetrates through the inner side and the outer side of the butt joint part 2, the through groove 21 penetrates through the whole butt joint part 2 along the extending direction of the butt joint part 2, the butt joint part 2 is at least provided with two through grooves 21, in the embodiment, the butt joint part 2 is provided with six through grooves 21, the through groove 21 divides the butt joint part 2 into 6 elastic walls 22, the elastic walls 22 are arranged in variable sections, one end, close to the limit cap 1, of the elastic wall 22 is thinner, one end, close to the base 3, of the elastic wall is thicker, the thickness is uniformly changed from one end to the other end, namely the cross section area, close to one end of the base 3, of the elastic wall 22 is larger than that of the other end, the cross section area is linearly changed along the extending direction, the thickness of one end, close to the base 3, of the elastic wall 22 is thicker, so that the deformation amount is reduced, the stress value in the root part existing in a stress concentration area is correspondingly reduced, the fatigue life of the plug bush is prolonged, the end, the thickness of the elastic wall 22, close to one end, close to the limit cap 1, is thinner, the insertion force of the contact pin is reduced, and the abrasion of plugging is reduced. The bullet wall 22 adopts the variable cross-section structure for bullet wall volume is whole not to change, has guaranteed the current-carrying capacity of plug bush.

The width that leads to groove 21 and be close to 3 one end of base is greater than the width of the other end, and leads to the width of groove 21 and follow the extending direction linear variation, presents the structure that plug bush butt joint portion closed up gradually, effectively increases the contact surface between plug bush and the contact pin.

Spacing cap 1 is connected in the plug bush socket department, connect in the one end that base 3 was kept away from to butt joint portion 2 promptly, spacing cap 1 is ring shape, the inside and outside and both ends of spacing cap 1 also are run through by logical groove 21, and also reduce along gradually at the logical groove 21 width of spacing cap 1 part, spacing cap 1 and butt joint portion 2 integrated into one piece, the inner circle diameter between them of junction is the same, smooth connection, spacing cap 1 outer lane diameter is greater than the outer lane diameter that base 3 one end was kept away from to butt joint portion 2, and spacing cap 1 outer lane diameter matches rather than the casing size that corresponds the setting, the casing internal diameter that matches along with the plug bush changes, when the plug bush receives external force and produces the large deformation, spacing cap uses the casing as the support, guarantee that whole bullet wall structure does not take place great irreversible deformation. The diameter of the inner ring of the limit cap 1 close to one end of the butt joint part 2 is smaller than that of the inner ring at the other end, the change range of the diameter of the inner ring of the limit cap 1 is gradually increased along the extension direction, and the inner side of the limit cap 1 is a convex cambered surface, so that insertion of a contact pin is facilitated.

Claims

1. The utility model provides a plug bush, its characterized in that includes base (3) and sets up in butt joint portion (2) of base (3) one side, butt joint portion (2) set up logical groove (21), lead to groove (21) and run through butt joint portion (2) inboard and outside, and lead to groove (21) and run through whole butt joint portion (2) along butt joint portion (2) extending direction, butt joint portion (2) set up two at least and lead to groove (21), the cross-sectional area that butt joint portion (2) are close to base (3) one end is greater than the cross-sectional area of the other end, and the cross-sectional area of butt joint portion (2) changes along extending direction linearity.

2. The insert according to claim 1, characterized in that the width of the through slot (21) is greater at one end close to the base (3) than at the other end, and the width of the through slot (21) varies linearly along the extension direction.

3. The insert sleeve according to claim 2, characterized in that the butt joint part (2) is annular, the outer ring diameter of the butt joint part (2) close to one end of the base (3) is larger than that of the other end, and the outer ring diameter of the butt joint part (2) changes linearly along the extension direction.

4. The plug bush according to claim 3, characterized by further comprising a limiting cap (1), wherein the limiting cap (1) is connected to one end of the butt joint part (2) far away from the base (3), the through groove (21) penetrates through the inner side and the outer side of the limiting cap (1) and penetrates through two ends of the limiting cap (1), the limiting cap (1) is circular, the outer ring diameter of the limiting cap (1) is larger than that of the butt joint part (2) far away from one end of the base (3), and the inner ring diameters of the limiting cap (1) and the butt joint part (2) at the joint intersection are the same.

5. The insert sleeve according to claim 4, characterized in that the diameter of the inner ring of the limiting cap (1) close to one end of the butt joint part (2) is smaller than that of the inner ring of the other end, and the change range of the diameter of the inner ring of the limiting cap (1) along the extension direction is gradually increased.

6. The insert sleeve according to claim 4, characterized in that the side of the base (3) remote from the butt joint part (2) is connected with a circular ring-shaped crimping barrel (4).

7. The insert sleeve according to claim 6, characterized in that the limiting cap (1), the butt joint part (2), the base (3) and the crimping barrel (4) are integrally machined and integrally formed.

8. The insert sleeve according to claim 7, wherein the limiting cap (1), the butt joint part (2), the base (3) and the crimping barrel (4) are made of copper alloy materials.