CN111864438A

CN111864438A - Charging gun

Info

Publication number: CN111864438A
Application number: CN202010653524.6A
Authority: CN
Inventors: 李林祥; 其他发明人请求不公开姓名
Original assignee: Changsha Runwu Zhilian Network Technology Co Ltd
Current assignee: Changsha Runwu Zhilian Network Technology Co Ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2020-10-30

Abstract

The invention discloses a charging gun which comprises a shell, wherein one end of the shell is provided with a charging plug, the other end of the shell is connected with a cable, a communication needle and positive and negative overcurrent pins are arranged in the charging plug, the communication needle and the positive and negative overcurrent pins are electrically connected with the cable, and the length of the communication needle is shorter than that of the positive and negative overcurrent pins. The charging gun provided by the invention can ensure that the positive and negative overcurrent pins are not electrified firstly in the process of contacting or separating with the charging pile when the charging gun is plugged and pulled out, so that the condition that contact pins are damaged by arc discharge is effectively avoided.

Description

Charging gun

Technical Field

The invention relates to the technical field of new energy battery charging guns, in particular to a charging gun which is good in safety and convenient to disassemble and maintain.

Background

The novel energy power battery is applied to the new energy power battery industry, and comprises the application in a plurality of fields such as electric passenger cars, four-wheel low-speed vehicles, two-wheel vehicles and the like. Wherein the charging gun and the corresponding socket interface are charging connecting parts of the charging pile and the vehicle.

The current rifle that charges overflows the stitch electrified when inserting and drawing out the rifle, overflows the stitch and leads to the contact pin top to draw the arc to burn out with the contact pin hole arc drawing easily. In addition, ordinary car rifle that charges is the integral type structure, and its pull out inserts life-span standard and is 10000 times. The charging gun plugging damage is basically the head pin damage. When the head contact pin is damaged, the existing integrated charging gun needs to be integrally replaced, and the use and maintenance cost is high. Furthermore, the cable outlet portion of the existing charging gun does not substantially meet the waterproof and dustproof requirements of IP67, and there is a need for further improvement of the waterproof and dustproof structure at the cable outlet of the charging gun.

Disclosure of Invention

The invention mainly aims to provide a charging gun, which at least solves the problem that when the charging gun in the prior art is inserted and pulled out, an overcurrent pin is electrified, and the overcurrent pin is easy to arc with a contact pin hole, so that the top of a contact pin is burnt out.

In order to achieve the purpose, the invention provides a charging gun which comprises a shell, wherein one end of the shell is provided with a charging plug, the other end of the shell is connected with a cable, a communication needle and positive and negative overcurrent pins are arranged in the charging plug and are electrically connected with the cable, and the length of the communication needle is shorter than that of the positive and negative overcurrent pins.

Furthermore, a microswitch is arranged on the shell, the cable is electrically connected with the microswitch, and the microswitch is respectively electrically connected with the communication needle and the positive and negative overcurrent pins.

Further, be equipped with main cavity room, control room and cable chamber in the casing, main cavity room is linked together with the cable chamber, and charging plug installs in the main cavity room, and micro-gap switch locates in the control room, and cable junction is in the cable chamber.

Further, the cable passes through a terminal cover to be installed in the cable chamber, is equipped with sealed chamber in the cable chamber, and sealed intracavity is equipped with the kicking block, is equipped with the waterproof cushion of silica gel between kicking block and the end cover, and kicking block and the waterproof cushion of silica gel are all established on the cable.

Further, the waterproof cushion of silica gel is located the inboard in clearance between end cover and the casing.

Furthermore, the inner side and the outer side of the silica gel waterproof cushion block are both provided with sealing ribs, the sealing ribs are arranged on the inner side or the outer side of the silica gel waterproof cushion block in a surrounding mode, and the cross sections of the sealing ribs are triangular.

Further, the diameter of the sealing cavity is larger than the inner diameter of the cable chamber, and a step is formed between the side wall of the sealing cavity and the side wall of the cable chamber.

Furthermore, the end cover is fixedly arranged at the end part of the shell through a locking screw, and an end cover sealing ring is arranged between the end cover and the end part of the shell.

Furthermore, the charging plug is connected with the shell through threads, a positioning screw hole is formed in the end portion of the shell, and the charging plug is fixed and positioned on the shell through a positioning screw penetrating through the positioning screw hole.

Furthermore, a sealing ring is arranged between the end face of the joint of the charging plug and the shell.

By applying the technical scheme of the invention, the length of the communication needle is set to be shorter than the length of the positive and negative overcurrent pins; when the charging gun is inserted into the charging pile, the positive and negative overcurrent pins are contacted firstly, and the communication pin is contacted later; when the charging gun is pulled out, the communication needle is disconnected firstly, and the positive and negative electrodes are disconnected after the pins are subjected to overcurrent; matching with a special charging pile, setting a control circuit of the charging pile to be that when a communication pin is communicated, positive and negative overcurrent pins are electrified, otherwise, the charging pile is not electrified; like this, when just can guaranteeing to charge the rifle plug, positive negative pole overflows the stitch and all can not be electrified earlier with the in-process of filling electric pile contact or separation, has avoided the contact pin to draw the phenomenon of arc damage effectively.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a perspective view of a charging gun according to an embodiment of the present invention.

Fig. 2 is a perspective view of another perspective view of the charging gun according to the embodiment of the invention.

Fig. 3 is a longitudinal sectional view schematically showing a charging gun according to an embodiment of the present invention.

Fig. 4 is a partially enlarged view of a portion a in fig. 3.

Fig. 5 is a schematic diagram illustrating the electrical connection principle between the charging gun and the charging pile and between the charging gun and the battery pack according to the embodiment of the invention.

Wherein the figures include the following reference numerals:

1. a housing; 2. a charging plug; 3. a cable; 4. a microswitch; 5. a seal ring; 6. an end cap; 7. a top block; 8. a silica gel waterproof cushion block; 9. locking the screw; 10. an end cap seal ring; 11. a main chamber; 12. a control room; 13. a cable chamber; 21. a communication pin; 22. positive and negative overcurrent pins; 23. a set screw; 81. sealing the ribs; 131. the chamber is sealed.

Detailed Description

In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The use of the words "a" or "an" and the like in the description and claims of the present patent application do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.

Referring to fig. 1 to 4, a charging gun according to an embodiment of the present invention mainly includes a housing 1, a charging plug 2 is disposed at one end of the housing 1, a cable 3 is connected to the other end of the housing 1, a communication pin 21 and positive and negative overcurrent pins 22 are disposed in the charging plug 2, the communication pin 21 and the positive and negative overcurrent pins 22 are electrically connected to the cable 3, and the length of the communication pin 21 is shorter than the length of the positive and negative overcurrent pins 22.

In the charging gun, the length of the communication needle 21 is set to be shorter than the length of the positive and negative overcurrent pins 22; when the charging gun is inserted into the charging pile, the positive and negative overcurrent pins 22 are contacted firstly, and the communication pin 21 is contacted later; when the charging gun is pulled out, the communication needle 21 is disconnected firstly, and the positive and negative electrodes are disconnected after the pins 22 are overflowed; when a control circuit of the charging pile is set to be communicated with the communication pin 21, the positive and negative overcurrent pins 22 are electrified, otherwise, the charging pile is not electrified; therefore, when the charging gun is plugged and pulled out, the positive electrode overcurrent pins 22 and the negative electrode overcurrent pins 22 are not electrified firstly in the contact or separation process with the charging pile, and the phenomenon that contact pins are damaged by arc discharge is effectively avoided. The schematic diagram of the electrical connection principle between the charging gun and the charging pile and between the charging gun and the battery pack is shown in fig. 5.

Referring to fig. 3, in this embodiment, a micro switch 4 is disposed on the housing 1, the cable 3 is electrically connected to the micro switch 4, and the micro switch 4 is electrically connected to the communication pin 21 and the positive and negative overcurrent pins 22, respectively. When the charging gun is inserted into the charging pile, the microswitch 4 is communicated, and the charging plug 2 is electrified and can charge the battery pack; when the charging gun is pulled out, the microswitch 4 is pressed down, the microswitch 4 is disconnected by the downward force, and the charging plug 2 is powered off at the moment. So set up, can further improve the security that the rifle that charges used.

Specifically, referring to fig. 3, in the present embodiment, a main chamber 11, a control chamber 12, and a cable chamber 13 are provided in the housing 1. Wherein, the main chamber 11 is communicated with the cable chamber 13; the charging plug 2 is arranged at one end of the main cavity 11; the microswitch 4 is arranged in the control chamber 12; the cable 3 is connected in the cable chamber 13 and is fixed by the cable lock.

Referring to fig. 3 and 4, in the present embodiment, the cable 3 is installed in the cable chamber 13 through an end cap 6, a sealing cavity 131 is disposed in the cable chamber 13, the diameter of the sealing cavity 131 is larger than the diameter of the main body of the cable chamber 13, a step is formed between the sidewall of the sealing cavity 131 and the sidewall of the cable chamber 13, a top block 7 is disposed in the sealing cavity 131, a silicone waterproof pad 8 is disposed between the top block 7 and the end cap 6, and both the top block 7 and the silicone waterproof pad 8 are sleeved on the cable 3. So set up, can effectively improve the waterproof dustproof performance at rifle cable outlet position that charges. The top block 7 is made of hard plastic materials.

Specifically, referring to fig. 4, in the present embodiment, the silicone waterproof pad 8 is located inside the gap between the end cover 6 and the housing 1, and the gap between the end cover 6 and the housing 1 is shielded by the silicone waterproof pad 8, so that external water and dust are prevented from entering the interior of the housing 1 from the gap between the end cover 6 and the housing 1.

Further, referring to fig. 3 and 4, in the present embodiment, a plurality of sealing ribs 81 are disposed on both the inner side and the outer side of the silicone waterproof pad 8, and the sealing ribs 81 are disposed around the inner side or the outer side of the silicone waterproof pad 8. Through setting up sealed muscle 81, can make between waterproof cushion of silica gel 8 and sealed chamber 131 inner wall, the end cover 6 inner wall to and between waterproof cushion of silica gel 8 and the cable 3 good sealing contact, further improve the waterproof dustproof performance at rifle cable outlet port position that charges. The cross section of the sealing rib 81 is preferably triangular, that is, the width of the root part of the sealing rib 81 is larger than that of the tip end of the sealing rib, so that the tip end of the sealing rib 81 has better flexibility, and the sealing rib 81 is more in close sealing contact with the sealing cavity 131, the end cover 6 and the cable 3.

Specifically, in the present embodiment, the end cover 6 is fixedly mounted at the end of the housing 1 through a plurality of locking screws 9, and an end cover sealing ring 10 is further disposed between the end cover 6 and the end of the housing 1, so as to further improve the waterproof and dustproof effects at the cable outlet of the charging gun. The end cover sealing ring 10 is made of silica gel.

When the charging gun of this embodiment installs cable 3, with kicking block 7 card in the sealed chamber 131 of the cable chamber 13 of charging gun, a terminal surface of kicking block 7 is close to the step, and waterproof cushion of silica gel 8 is crowded to its another terminal surface, and end cover 6 passes through locking screw 9 and locks on casing 1, crowds the other terminal surface of waterproof cushion of silica gel 8 simultaneously. Under the condition of locking, the silica gel waterproof cushion block 8 expands, and the multiple circles of sealing ribs 81 on the inner side and the outer side of the silica gel waterproof cushion block respectively seal the whole cable 3 circle and the whole end cover 6 circle, so that the effect of taking up the wire for sealing is achieved, and the sealing between the end cover 6 and the shell 1 is realized by using the end cover sealing ring 10. Through the structure, the cable outlet of the charging gun can achieve the waterproof and dustproof performance of IP 67.

After the charging gun is plugged and pulled for a long time, the contact pins in the charging plug 2 are easy to damage, and need to be replaced at the moment. The existing integrated charging gun needs to be integrally replaced with a new one when a contact pin is damaged, and the used maintenance cost is high. In order to solve the above problem, referring to fig. 1, 2 and 3, in the present embodiment, a split structure is adopted between the charging plug 2 and the housing 1 of the charging gun, and the charging plug 2 and the housing 1 are connected by a thread. Set up like this, when the contact pin damages and need to be changed and maintain, only need with charging plug 2 from casing 1 unscrew, the charging plug 2 of renewal can, and need not the rifle that charges that wholly changes the renewal, practiced thrift use and maintenance cost. Furthermore, a positioning screw hole is provided at an end portion of the housing 1, and the charging plug 2 is fixed and positioned at one end of the housing 1 by a positioning screw 23 inserted into the positioning screw hole. The charging plug 2 is connected in a reinforcing mode through the positioning screws 23, and the charging plug 2 is prevented from loosening in the using process.

Further, referring to fig. 3, in the present embodiment, a seal ring 5 is further provided between the end surface of the connection between the charging plug 2 and the housing 1. Through setting up sealing washer 5, can make to be connected more firmly between charging plug 2 and the casing 1, further avoid charging plug 2 not hard up to appear to can play the waterproof effect of charging gun head portion.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a charging gun, includes casing (1), the one end of casing (1) is equipped with charging plug (2), the other end of casing (1) is connected with cable (3), its characterized in that, be equipped with communication needle (21) and positive negative pole in charging plug (2) and overflow stitch (22), communication needle (21) with positive negative pole overflow stitch (22) all with cable (3) electricity is connected, the length weak point of communication needle (21) is in the length that positive negative pole overflows stitch (22).

2. The charging gun according to claim 1, wherein a microswitch (4) is arranged on the housing (1), the cable (3) is electrically connected with the microswitch (4), and the microswitch (4) is electrically connected with the communication needle (21) and the positive and negative overcurrent pins (22) respectively.

3. Charging gun according to claim 2, characterized in that a main chamber (11), a control chamber (12) and a cable chamber (13) are provided in the housing (1), the main chamber (11) is in communication with the cable chamber (13), the charging plug (2) is mounted in the main chamber (11), the microswitch (4) is provided in the control chamber (12), and the cable (3) is connected in the cable chamber (13).

4. The charging gun according to claim 3, wherein the cable (3) is installed in the cable chamber (13) through an end cap (6), a sealing cavity (131) is arranged in the cable chamber (13), a top block (7) is arranged in the sealing cavity (131), a silica gel waterproof cushion block (8) is arranged between the top block (7) and the end cap (6), and both the top block (7) and the silica gel waterproof cushion block (8) are sleeved on the cable (3).

5. Charging gun according to claim 4, characterized in that the silicone waterproof gasket (8) is located inside the gap between the end cap (6) and the housing (1).

6. The charging gun according to claim 4, characterized in that the inner side and the outer side of the silica gel waterproof cushion block (8) are provided with sealing ribs (81), the sealing ribs (81) are arranged around the inner side or the outer side of the silica gel waterproof cushion block (8), and the cross section of the sealing ribs (81) is triangular.

7. Charging gun according to claim 4, characterized in that the diameter of the sealing cavity (131) is larger than the inner diameter of the cable chamber (13), a step being formed between the side wall of the sealing cavity (131) and the side wall of the cable chamber (13).

8. Charging gun according to claim 4 characterized in that the end cap (6) is fixedly mounted at the end of the housing (1) by means of locking screws (9), and an end cap sealing ring (10) is arranged between the end cap (6) and the end of the housing (1).

9. Charging gun according to any of claims 1-8, characterized in that the charging plug (2) is connected with the housing (1) by screw thread, the end of the housing (1) is provided with a positioning screw hole, and the charging plug (2) is fixed on the housing (1) by a positioning screw (23) passing through the positioning screw hole.

10. Charging gun according to claim 9, characterized in that a sealing ring (5) is provided between the end faces of the connection of the charging plug (2) and the housing (1).