CN217215385U

CN217215385U - Charging seat capable of being automatically locked, charging device and motor vehicle

Info

Publication number: CN217215385U
Application number: CN202122387271.5U
Authority: CN
Inventors: 王超; 苗云
Original assignee: Changchun Jetty Automotive Parts Co Ltd
Current assignee: Changchun Jetty Automotive Parts Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-08-16
Anticipated expiration: 2031-09-30

Abstract

The utility model discloses an automatic charging seat, charging device and motor vehicle of locking, charging seat include pedestal, terminal and locking mechanism, are equipped with at least one terminal section of thick bamboo on the pedestal, and the terminal has the insertion section that the diameter changes, and the at least part setting of insertion section is inside a terminal section of thick bamboo, and the cavity is inserted in the inside formation of insertion section, and locking mechanism at least part sets up in the insertion section periphery to construct and reduce or enlarge along terminal axial direction translation and messenger's diameter that inserts the cavity. The utility model discloses an automatic charging seat of locking can make female terminal automatic locking when male terminal and female terminal are to inserting, guarantees female terminal and male terminal area of contact when inserting, reduces the contact resistance to inserting the structure, reduces because the risk that the spare part damage even vehicle that the structure temperature rise of inserting produced burns out.

Description

Charging seat capable of being automatically locked, charging device and motor vehicle

Technical Field

The utility model relates to an electric energy transmission field, more specifically relates to a charging seat, a charging device and motor vehicle of automatic locking.

Background

The electric automobile need insert the rifle that charges into the charging seat when charging. The public terminal inside the rifle that charges and the inside female terminal of charging seat are inserted and are realized electric conduction, the connector form that exists on the market at present is mostly the wire spring hole, the bow piece form, mostly rely on the elasticity of terminal own material to realize the contact connection of terminal when inserting, the structure is fairly complicated and contact resistance and the temperature rise when using most can't satisfy the requirement, because charging current is great, the terminal is because the temperature risees when charging, the material inflation of terminal itself expands, make the cavity of inserting of female terminal enlarge, the area of contact with public terminal reduces, make the contact resistance of inserting the structure risees, and then lead to the temperature rise higher, there have been many cases because of connector structure, the temperature rise, contact resistance scheduling problem causes the vehicle to burn or local spare part damage, to the vehicle, the accident such as casualties are caused to personnel.

At present, the charging seat structure that can make female terminal automatic locking when male terminal and female terminal are to inserting is urgently needed, can guarantee female terminal and male terminal area of contact when inserting, reduces the contact resistance to inserting the structure, reduces because the risk that the spare part damage that the structure temperature rise of inserting too high produced even the vehicle burns out.

SUMMERY OF THE UTILITY MODEL

The utility model provides an automatic charging seat of locking can make female terminal automatic locking when male terminal and female terminal are to inserting, guarantees female terminal and male terminal area of contact when inserting, reduces the contact resistance to inserting the structure, reduces because damage the risk that the spare part that the temperature rise of inserting the structure too high produced even the vehicle burns out. The terminal device comprises a seat body, wherein at least one terminal cylinder is arranged on the seat body; a terminal having an insertion section of varying diameter, at least a portion of the insertion section disposed inside the terminal barrel, the insertion section forming an insertion cavity therein; a locking mechanism disposed at least partially about the insertion section and configured to translate in the terminal axial direction and cause the diameter of the insertion cavity to decrease or increase.

Optionally, the insertion section is tapered, and the insertion cavity is configured with an opening at one end, and the insertion cavity has a smaller diameter at the open end than at an end away from the opening.

Optionally, the ratio of the maximum diameter to the minimum diameter of the insertion cavity is in the range of 1.2-2.2.

Optionally, the locking mechanism includes a translation mechanism and an elastic body, the translation mechanism includes at least one locking ring and a push rod, the locking ring is sleeved on the periphery of the insertion section, the push rod is arranged at one end of the locking ring close to the seat body, and the elastic body is in contact connection with the push rod.

Optionally, the elastomer is an elastic rubber or a compression spring.

Optionally, the elastic force of the elastomer is 5N-95N.

Optionally, the locking ring is circular, and the inner diameter of the locking ring is greater than the diameter of the insertion section at the end of the opening and smaller than the diameter of the insertion section at the end far away from the opening.

Optionally, the inside of the locking ring is tapered, the taper of the inside of the locking ring is the same as the taper of the outer periphery of the insertion section, and when the locking ring is in a diameter reduction state of the insertion cavity, the inner wall of the locking ring is attached to the outer wall of the insertion section.

Optionally, the distance between the inner wall of the locking ring and the outer wall of the insertion section in the natural state is 0.01mm-5 mm.

Alternatively, when the locking ring is moved from the end of the insertion section with the smaller diameter to the end of the insertion section with the larger diameter, the inner wall of the locking ring contacts and applies pressure to the outer wall of the insertion section, causing the diameter of the insertion cavity to decrease.

Optionally, the inner wall of the locking ring applies a pressure of 5N-100N to the outer wall of the insertion section.

Alternatively, when the locking ring moves from the end with the larger diameter of the insertion section to the end with the smaller diameter of the insertion section, the inner wall of the locking ring is separated from the outer wall of the insertion section, and the insertion section expands the diameter of the insertion cavity under the self-elasticity action.

Optionally, the translation mechanism further includes at least one connecting rod, one end of the connecting rod is connected to the locking ring, and the other end of the connecting rod is connected to the push rod.

Optionally, the number of the connecting rods is multiple, and the multiple connecting rods are arranged along the circumferential direction of the locking ring.

Optionally, the number of the connecting rods is multiple, and the connecting rods are uniformly distributed along the circumferential direction of the locking ring.

Optionally, the locking mechanism is integrally formed.

Optionally, the terminal barrel is provided with at least one sliding groove on an inner side wall thereof, the sliding groove is arranged along an axial direction of the terminal barrel, and the translation mechanism slides in the sliding groove.

Optionally, the sliding groove is arranged in a matching manner with the connecting rod, and the connecting rod slides in the sliding groove.

Optionally, the sliding groove is provided with a sliding groove opening at one end close to the seat body, and the push rod extends from the sliding groove opening to the outside of the side wall of the terminal cylinder.

Optionally, one end of the elastic body is arranged on the seat body, and the other end of the elastic body is abutted to the push rod.

Optionally, the side wall of the insertion section is provided with at least one slot, the slot is arranged along the axial direction of the insertion section, and the slot is not closed at one end of the opening.

Optionally, the slot is aligned with the connecting rod, and the connecting rod slides in the slot.

Optionally, the slot is aligned with the push rod, the push rod slides in the slot, and the push rod extends from the slot into the insertion cavity.

Optionally, one end of the elastic body is arranged at the bottom of the insertion cavity, and the other end of the elastic body is abutted to the push rod.

The utility model discloses an on the other hand provides a charging device, reach the rifle that charges to joining in marriage including aforementioned charging seat, the rifle that charges is in including the rifle head and the setting of charging the rifle terminal that charges of rifle head inside, the rifle head that charges with the charging seat is to inserting, the rifle terminal that charges with the terminal is to inserting.

Optionally, when the charging gun head is inserted into the charging seat, the terminal cylinder is inserted into the charging gun head, the charging gun head pushes the push rod to drive the locking mechanism to move towards the seat body, and the locking mechanism reduces the diameter of the insertion cavity.

Optionally, the inner wall of the locking ring applies a pressure of 5-100N to the outer wall of the insertion section.

Optionally, when the charging gun head is inserted into the charging seat, the charging gun terminal is inserted into the insertion cavity, and pushes the push rod to drive the locking mechanism to move towards the seat body, and the locking mechanism reduces the diameter of the insertion cavity.

Optionally, the push rod compresses the elastic body and drives the locking ring to move towards the seat body, and the inner wall of the locking ring applies pressure to the outer wall of the insertion section, so that the diameter of the insertion cavity is reduced.

Optionally, when the charging gun head is pulled out of the charging seat, the push rod drives the locking ring to move towards a direction away from the seat body under the elastic action of the elastic body, the inner wall of the locking ring is separated from the outer wall of the insertion section, and the diameter of the insertion cavity is enlarged by the insertion section under the elastic action of the insertion section.

Optionally, the elastic force of the elastomer is 5N-95N.

The utility model also provides a motor vehicle, including the aforesaid charging seat, and the aforesaid charging device.

The utility model discloses a characteristics and advantage are:

1. when the charging seat charges, can make female terminal automatic locking when male terminal and female terminal are to inserting, guarantee the area of contact when female terminal and male terminal are to inserting, reduce the contact resistance to inserting the structure, reduce because the risk that the spare part damage that the structure temperature rise of inserting produced even the vehicle burns out.

2. The utility model discloses do not have extra driving system, rely on the rifle male power that charges to realize terminal locking, rely on the elastomer to realize that the terminal loosens, simple structure, the fault rate is low.

3. Through the translation of locking ring, can make the diameter of inserting the cavity reduce or enlarge to locking or loosen the plug-in terminal, can reduce the insertion force when the rifle that charges inserts the charging seat, when guaranteeing to charge again, the reliable electricity between male terminal and the female terminal is connected.

4. Adopt elastic rubber or compression spring as the elastomer, can rely on the elasticity of self, resume translation mechanism to initial position after the rifle that charges is extracted, avoid because translation mechanism card dies to lead to the rifle that charges can't extract.

5. The utility model discloses the inside tapering of well locking ring is the same with the tapering of insertion section periphery, can be when locking and unclamp, and the locking ring realizes the face contact with the insertion section, avoids the locking ring inner wall to cause the damage to the insertion section periphery.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a charging seat according to an embodiment of the present invention;

fig. 2 is a schematic view of a locking mechanism according to an embodiment of the present invention;

fig. 3 is a schematic view of an insertion structure of a charging gun head and a charging terminal according to an embodiment of the present invention;

fig. 4 is a schematic diagram of the locking mechanism locking the charging terminal according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of a charging stand according to another embodiment of the present invention;

FIG. 6 is a schematic view of a locking mechanism according to another embodiment of the present invention;

fig. 7 is a schematic view of an opposite insertion structure of a charging gun head and a charging terminal according to another embodiment of the present invention;

fig. 8 is a schematic diagram of a locking mechanism for locking a charging terminal according to another embodiment of the present invention.

The figures are labeled as follows:

10. a base body; 101. a terminal barrel; 102. a chute; 103. a chute opening;

20. a terminal; 201. an insertion section; 202. inserting into the cavity; 203. slotting;

30. a locking mechanism; 301. locking ring; 302. a connecting rod; 303. a push rod; 304. an elastomer;

40. charging the gun head; 401. and a charging gun terminal.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The utility model provides a charging seat with an automatic locking mechanism, which comprises a seat body 10, wherein at least one terminal cylinder 101 is arranged on the seat body 10; the terminal 20, the terminal 20 has an insertion section 201 with a variable diameter, at least part of the insertion section 201 is arranged inside the terminal barrel 101, and an insertion cavity 202 is formed inside the insertion section 201; and the locking mechanism 30, wherein the locking mechanism 30 is at least partially arranged on the periphery of the insertion section 201 and is configured to translate along the axial direction of the terminal 20 and reduce or enlarge the diameter of the insertion cavity 202. The utility model discloses a charging seat can make the automatic locking of female terminal when charging, guarantees female terminal and male terminal area of contact when inserting, reduces the contact resistance to inserting the structure, reduces because damage the risk that the vehicle burns out even to inserting the spare part that the structure temperature rise too high produced.

The utility model discloses do not have extra driving system, rely on the rifle male power that charges to realize terminal locking, rely on the elastomer to realize that the terminal loosens, simple structure, the fault rate is low.

The first embodiment is as follows:

as shown in fig. 1 to 4, which are schematic views of an embodiment of the present invention, in this embodiment, the insertion section 201 is a cone, one end of the insertion cavity 202 is configured as an opening, and a diameter of the insertion cavity 202 at the opening end is smaller than a diameter of the end far away from the opening. When the terminal 20 is mated with the mating terminal, the mating terminal is inserted into the insertion cavity 202, and the diameter of the open end of the insertion cavity 202 is increased by the pressing of the mating terminal.

In a preferred embodiment, the ratio of the maximum diameter to the minimum diameter of insertion cavity 202 ranges from 1.2 to 2.2. When the ratio of the maximum diameter to the minimum diameter of the insertion cavity 202 is too small, the elastic force of the side wall of the insertion cavity 202 is too small, and when the insertion terminal is inserted into the insertion cavity, the insertion force is too small, so that the conductivity of the insertion structure is reduced; when the ratio is too large, the elastic force of the sidewall of the insertion cavity 202 is too large, but the structure is difficult to process, and the yield is reduced.

In order to test the effect of the ratio of the maximum diameter to the minimum diameter of the insertion cavity 202 on the electrical conductivity, the inventors selected 10 terminals 20 of the same shape and having different ratios of the maximum diameter to the minimum diameter of the insertion cavity 202 and tested the mating terminals for mating force, and the test results are shown in table 1. In this embodiment, the conductivity of more than 99% is desirable.

Table 1: the effect of the ratio of the maximum diameter to the minimum diameter of the insertion cavity 202 on the electrical conductivity:

as can be seen from table 1, when the ratio of the maximum diameter to the minimum diameter of the insertion cavity 202 is less than 1.2, the conductivity is significantly reduced, failing to meet the actual demand. When the ratio of the maximum diameter to the minimum diameter of the insertion cavity 202 is greater than 2.2, the electrical conductivity is better, but the electrical conductivity is not significantly increased and the processing is difficult, so the inventors consider that the ratio of the maximum diameter to the minimum diameter of the insertion cavity 202 is preferably 1.2 to 2.2.

In a preferred embodiment, the locking mechanism 30 comprises a translation mechanism and an elastic body 304, the translation mechanism comprises at least one locking ring 301 and a push rod 303, the locking ring 301 is sleeved on the periphery of the insertion section 201, the push rod 303 is arranged at one end of the locking ring 301 close to the seat body 10, and the elastic body 304 is in contact connection with the push rod 303. In a specific implementation, the number of the locking rings 301 may be one or more, and when one of the locking rings 301 is damaged, the other locking rings 301 may replace the damaged locking ring 301 to achieve the same locking function.

In a preferred embodiment, the elastomer 304 is an elastic rubber or compression spring. The elastic body 304 is arranged between the push rod 303 and the seat body 10, when the translation mechanism moves towards the seat body 10, the push rod 303 is forced to compress the elastic body 304, as shown in fig. 4; when the force applied to the push rod 303 is removed, the elastic body 304 makes the push rod 304 move in the direction opposite to the seat body 10 by its own elastic force.

Adopt elastic rubber or compression spring as the elastomer, can rely on the elasticity of self, resume translation mechanism to initial position after the rifle that charges is extracted, avoid because translation mechanism card dies to lead to the rifle that charges can't extract.

In a preferred embodiment, the elastic force of the elastomer 304 is 5N-95N. When the elastic force of the elastic body 304 is too large, the resistance force applied to the push rod 303 moving towards the base 10 direction under the driving of the locking ring 301 is too large, and the terminal 20 cannot be completely locked, so that the contact area is too small when the opposite plug terminal is inserted, and the contact resistance is too large; when the elastic force of the elastic body 304 is too small, the opposite-insertion terminal is easy to shake in the insertion cavity 202, so that the contact area of the opposite-insertion structure is too small, and the contact resistance is too large.

In order to verify the influence of the elastic force of the elastic body 304 on the contact resistance of the plugging structure, the inventor selects the base 10 and the terminal 20 with the same size specification, applies different pressures to the outer wall of the plugging section 201 from the inner wall of the locking ring 301, then selects the same plugging terminal and the terminal 20 for plugging, tests the contact resistance between the plugged terminals respectively, and tests the successful plugging ratio of the plugging terminal in multiple plugging experiments, wherein the test results are shown in table 2.

The contact resistance test method comprises the following steps: using the micro resistance meter, the measuring end of the micro resistance meter is placed on the opposite plug end terminal at one end and on the terminal 20 at the same position for each measurement, and then the contact resistance reading on the micro resistance meter is read. In this example, a contact resistance of more than 1m Ω is not acceptable.

Table 2: influence of elastic force of the elastic body 304 on contact resistance

As can be seen from table 2, when the elastic force of the elastic body 304 is less than 5N, the contact resistance is greater than 1m Ω, and the contact resistance is too large; when the elastic force of the elastic body 304 is larger than 95N, the contact resistance is larger than 1m omega, so that the adverse effects that automobile accessories are burnt due to overlarge contact resistance and overhigh temperature rise in use are easily caused. Therefore, the inventors set the elastic force of the elastic body 304 to be in the range of 5N to 95N.

In a preferred embodiment, locking ring 301 is circular and has an inner diameter that is greater than the diameter of insertion section 201 at the open end and less than the diameter of insertion section 201 at the end remote from the open end. The locking ring 301 is driven by the push rod 304 to translate along the periphery of the insertion section 201, and when the locking ring 301 moves to the position that the diameter of the insertion cavity 202 is larger than that of the locking ring 301, the inner wall of the locking ring 301 exerts pressure on the outer wall of the insertion section 201 to enable the insertion section 201 to shrink; when the locking ring 301 is moved in a direction in which the diameter of the insertion cavity 202 is smaller, the contracted insertion section 201 returns to a natural state due to the disappearance of the external force.

Through the translation of locking ring 301, can make the diameter of inserting cavity 202 reduce or enlarge to locking or unclamp the plug terminal, can reduce the insertion force when the rifle that charges inserts the charging seat, when guaranteeing again to charge, the reliable electricity between male terminal and the female terminal is connected.

In a preferred embodiment, the inside of the locking ring 301 is tapered, the taper of the inside of the locking ring 301 is the same as the taper of the outer circumference of the insertion section 201, and when the locking ring 301 is in a reduced diameter state of the insertion cavity 202, the inner wall of the locking ring 301 is in contact with the outer wall of the insertion section 201.

In a preferred embodiment, the distance between the inner wall of the locking ring 301 and the outer wall of the insertion section 201 in the natural state is 0.01mm to 5 mm. In a natural state, if there is no gap between the inner wall of the locking ring 301 and the outer wall of the insertion section 201, when the locking ring 301 moves towards the base 10, the movable distance is too small, the outer wall of the insertion section 201 cannot be uniformly stressed, the contact area between the opposite insertion terminal and the terminal 20 is small, and the contact resistance is too high; if the distance between the inner wall of the locking ring 301 and the outer wall of the insertion section 201 is too large, when the locking ring 301 moves towards the base 10, the inner wall of the locking ring 301 does not apply enough pressure to the outer wall of the insertion section 201 to lock the terminal 20, resulting in a small contact area between the opposite insertion terminal and the terminal 20 and too high contact resistance.

In order to verify the influence of the distance between the inner wall of the locking ring 301 and the outer wall of the insertion section 201 in the natural state on the contact resistance and the plugging and unplugging condition after plugging and unplugging the opposite plug terminal, the inventor selects the base 10 and the terminal 20 with the same dimension specification, selects different distances between the inner wall of the locking ring 301 and the outer wall of the insertion section 201 in the natural state, then selects the same opposite plug terminal and terminal 20 for plugging and respectively tests the contact resistance between the terminals after plugging and unplugging, and the test results are shown in table 3.

The contact resistance test method comprises the following steps: using the micro-resistance meter, one end of the measuring end of the micro-resistance meter is placed on the opposite-insertion end terminal, and the other end is placed on the terminal 20, and the position where each measurement is placed is the same, and then the contact resistance reading on the micro-resistance meter is read. In this example, a contact resistance greater than 1m Ω is not acceptable.

Table 3: influence of the distance between the inner wall of the locking ring 301 and the outer wall of the insertion section 201 in the natural state on the contact resistance

As can be seen from table 3, when the distance between the inner wall of the locking ring 301 and the outer wall of the insertion section 201 in the natural state is less than 0.01mm, the contact resistance between the opposite insertion terminal and the terminal 20 is greater than 1m Ω, and the contact resistance is too large; when the distance between the inner wall of the securing ring 301 and the outer wall of the insertion section 201 in the natural state is greater than 5mm, the contact resistance between the opposite insertion terminal and the terminal 20 is greater than 1m Ω, and therefore, the inventors set the distance between the inner wall of the securing ring 301 and the outer wall of the insertion section 201 in the natural state to 0.01mm to 5 mm.

The utility model discloses the inside tapering of well locking ring 301 is the same with the tapering of inserting section 201 periphery, can be when locking and unclamping, and locking ring 301 realizes the face contact with inserting section 201, avoids the locking ring inner wall to cause the damage to inserting the section periphery.

In a preferred embodiment, when the locking ring 301 is moved from the end of the insertion section 201 having a smaller diameter to the end of the insertion section 201 having a larger diameter, the inner wall of the locking ring 301 contacts the outer wall of the insertion section 201 and applies pressure to the outer wall of the insertion section 201, causing the insertion cavity 202 to decrease in diameter.

In a preferred embodiment, the pressure exerted by the inner wall of the locking ring 301 against the outer wall of the insertion section 201 is between 5N and 100N. If locking ring 301 inner wall only with insert section 201 outer wall contact, do not exert pressure, then after the assembly is inserted to inserting terminal and terminal 20, the terminal that inserts can take place to rock under the exogenic action, lead to terminal 20 and to inserting the area of contact between the terminal little, contact resistance is too high, and then the temperature rise is too high between the terminal, can lead to occurence of failure such as burning of catching a fire when serious.

When the pressure applied to the outer wall of the insertion section 201 by the inner wall of the locking ring 301 is too small, the phenomenon that the inserted terminal shakes under the action of external force, the contact area between the terminal 20 and the inserted terminal is small, and the contact resistance is too high can also occur; when the pressure applied by the inner wall of the locking ring 301 to the outer wall of the insertion section 201 is too large, the terminal 20 is fixed at the center of the insertion cavity 202, and is difficult to be deviated, and when the opposite plug terminals with different eccentricity are assembled, the opposite plug terminals with larger eccentricity can not be inserted.

In order to verify the influence of the pressure applied by the inner wall of the locking ring 301 to the outer wall of the insertion section 201 on the contact resistance and the plugging and unplugging condition after plugging and unplugging the plug-in terminals, the inventor selects the base 10 and the terminal 20 with the same size and specification, selects the pressure applied by the inner wall of the locking ring 301 to the outer wall of the insertion section 201, then selects the same plug-in terminal and terminal 20 for plugging and respectively tests the contact resistance between the plugged-in terminals, and the test results are shown in table 4.

The method for testing the plug-in success rate comprises the following steps: the charging terminals of each pressure value applied to the outer wall of the insertion section 201 by the inner wall of the locking ring 301 are inserted into the corresponding 100 insertion terminals with the same eccentricity, and the number of successful insertions is recorded and multiplied by 100% compared with the total number. In the present embodiment, the success rate of the pair insertion is less than 95%.

Table 4: effect of different pressures on contact resistance and on insertion success

As can be seen from table 4, when the pressure applied to the outer wall of the insertion section 201 by the locking ring 301 is less than 5N, although the success rate of the opposite insertion is acceptable, the contact resistance between the opposite insertion terminal and the terminal 20 is greater than 1m Ω, and the contact resistance is too large; when the pressure of the locking ring 301 applied to the outer wall of the insertion section 201 is greater than 100N, the insertion success rate is less than 95%, which cannot meet the application requirements, and therefore, the inventors set the pressure of the locking ring 301 applied to the outer wall of the insertion section 201 to be 5N-100N.

In a preferred embodiment, when the locking ring 301 is moved from the end of the insertion section 201 with the larger diameter to the end of the insertion section 201 with the smaller diameter, the inner wall of the locking ring 301 is separated from the outer wall of the insertion section 201, and the insertion section 201 expands the diameter of the insertion cavity 202 under its own elastic force.

In a preferred embodiment, the translation mechanism further comprises at least one connecting rod 302, one end of the connecting rod 302 being connected to the locking ring 301 and the other end being connected to the push rod 303. The connecting rod 302 is driven by the push rod 303 to translate, and simultaneously the connecting rod 302 drives the locking ring 301 to translate.

In a preferred embodiment, the number of the connecting rods 302 is plural, and the plural connecting rods 302 are circumferentially arranged along the locking ring 301. A plurality of connecting rods 302 are connected with the locking ring 301 along the circumferential direction of the locking ring 301, and are used for driving the locking ring 301 to move, and more than 3 connecting rods 302 can make the connection with the locking ring 301 more stable.

In a preferred embodiment, the number of the connecting rods 302 is multiple, and the connecting rods 302 are uniformly distributed along the circumference of the locking ring 301. The connecting rods 302 are uniformly distributed on the circumferential direction of the locking ring 301, so that the force applied to the locking ring 301 by the connecting rods 302 is more uniform, the locking mechanism 30 realizes the locking function of the terminal 20, the expansion and expansion of the terminal 20 when being matched with an opposite-inserting terminal are avoided, the temperature rise of an opposite-inserting structure is reduced, and the damage of automobile parts caused by over-high temperature rise is reduced.

In a preferred embodiment, the locking mechanism 30 is integrally formed. The integrated into one piece's structural design intensity is high, and the important thing can concentrate the processing and assemble again, has improved assembly efficiency greatly.

In a preferred embodiment, at least one sliding slot 102 is disposed on the inner side wall of the terminal barrel 101, the sliding slot 102 is disposed along the axial direction of the terminal barrel 101, and the translation mechanism slides in the sliding slot 102.

In a preferred embodiment, the slide slot 102 is disposed in alignment with the connecting rod 302, and the connecting rod 302 slides within the slide slot 102. The number of the sliding grooves 102 is the same as that of the connecting rods 302, and each connecting rod 302 is arranged in the corresponding sliding groove 102 and driven by the push rod 302 to slide in the sliding groove 102. The sliding groove 102 can enable the locking mechanism 30 to move stably in the terminal barrel 101, and more importantly, it is ensured that the locking mechanism 30 does not rotate in the terminal barrel 101, so as to prevent the contact area of the opposite-insertion structure from becoming smaller and the temperature from rising too high due to uneven stress on the insertion section 201.

In the preferred embodiment, the slide slot 102 is provided with a slide slot opening 102 at one end near the housing 10, and the push rod 303 extends from the slide slot opening 102 to the outside of the side wall of the terminal barrel 101. When the charging gun head 40 is inserted into the charging seat, the charging gun terminal 50 is inserted into the insertion cavity 202, and the push rod 303 is pushed to drive the locking mechanism 30 to move towards the seat body 10, so that the locking mechanism 30 reduces the diameter of the insertion cavity 202

In a preferred embodiment, one end of the elastic body 304 is provided on the housing 10, and the other end abuts against the push rod 303. The elastic body 304 ensures the stable contact of the locking mechanism with the insertion section 201, and can make the locking mechanism move in the opposite direction under the action of the elastic force of the elastic body, so as to remove the locking function of the locking mechanism.

Example two:

as shown in fig. 5-8, for another embodiment of the present invention, in this embodiment, at least one slot 203 is disposed on the sidewall of the insertion section 201, the slot 203 is disposed along the axial direction of the insertion section 201, and the open end of the slot 203 in the insertion cavity 202 is not closed.

In a preferred embodiment, the slot 203 is disposed in alignment with the connecting rod 302, and the connecting rod 302 slides within the slot 203. The plurality of slots 203 are uniformly formed in the side wall of the insertion section 201, the plurality of connecting rods 302 and the plurality of slots 203 are uniformly formed in a one-to-one correspondence manner and move in the slots 203, so that the inner space of the insertion cavity 202 is effectively saved, the force applied to the locking ring 301 by the connecting rods 302 is more uniform, the locking mechanism 30 realizes the locking function on the terminal 20, the expansion and expansion of the terminal 20 when being matched with an opposite insertion terminal are avoided, the temperature rise of the opposite insertion structure is reduced, and the damage of automobile parts caused by over-high temperature rise is reduced.

In a preferred embodiment, the slot 203 is disposed in alignment with the push rod 303, the push rod 303 slides within the slot 203, and the push rod 303 extends from the slot 203 into the insertion cavity 202.

In a preferred embodiment, the elastic body 304 has one end disposed at the bottom of the insertion cavity 202 and the other end abutting against the push rod 303. The push rod 303 is forced to move towards the seat body to compress the elastic body 304, as shown in fig. 8; when the external force disappears, the elastic body 304 moves the push rod 303 in the opposite direction by its own elastic force.

Other contents of this embodiment are the same as those of the first embodiment, and are not described herein again.

Example three:

the utility model also provides a charging device, including aforementioned charging seat to the rifle that charges to the joining in marriage, the rifle that charges is including the rifle head 40 and the setting rifle terminal 50 that charges of rifle head 40 inside charges, and the rifle head 40 and the charging seat of charging are to inserting, the rifle terminal 50 that charges with terminal 20 is to inserting.

In a preferred embodiment, when the charging gun head 40 is inserted into the charging seat, the terminal barrel 101 is inserted into the charging gun head 40, the charging gun head 40 pushes the push rod 303 to drive the locking mechanism 30 to move towards the seat body 10, and the locking mechanism 30 reduces the diameter of the insertion cavity 202. In this embodiment, the push rod 303 extends out of the side wall of the terminal barrel 101, when the terminal barrel 101 is inserted into the charging gun head 40, the charging gun head 40 contacts with the push rod 303 and pushes it to move, and the push rod 303 drives the whole locking mechanism 30 to move towards the seat 10.

In a preferred embodiment, when the charging gun head 40 is inserted into the charging seat, the charging gun terminal 50 is inserted into the insertion cavity 202, and the push rod 303 is pushed to drive the locking mechanism 30 to move towards the seat body 10, so that the locking mechanism 30 reduces the diameter of the insertion cavity 202. In this embodiment, since the push rod 303 extends from the slot 203 to the inside of the insertion cavity 202, when the charging gun head 40 is inserted into the charging seat, the charging gun terminal 50 is inserted into the insertion cavity 202, the charging gun terminal 50 contacts with the push rod 303 and pushes the push rod 303 to move, and the push rod 303 drives the whole locking mechanism to move towards the seat body 10.

In a preferred embodiment, the push rod 303 compresses the elastic body 304 and drives the locking ring 301 to move toward the base 10, and the inner wall of the locking ring 301 applies pressure to the outer wall of the insertion section 201, so as to reduce the diameter of the insertion cavity 202.

In a preferred embodiment, the pressure exerted by the inner wall of locking ring 301 against the outer wall of insertion section 201 is between 5N and 100N. If locking ring 301 inner wall only with insert section 201 outer wall contact, do not exert pressure, then after the assembly is inserted to inserting terminal and terminal 20, the terminal that inserts can take place to rock under the exogenic action, lead to terminal 20 and to inserting the area of contact between the terminal little, contact resistance is too high, and then the temperature rise is too high between the terminal, can lead to occurence of failure such as burning of catching a fire when serious.

In order to verify the influence of the pressure applied by the inner wall of the locking ring 301 to the outer wall of the insertion section 201 on the contact resistance and the insertion and extraction condition of the inserted and extracted terminals, the inventor selects the base 10 and the terminal 20 with the same size specification, selects the pressure applied by the inner wall of the locking ring 301 to the outer wall of the insertion section 201, selects the same inserted and extracted terminals and terminals 20 to perform the insertion and extraction, and respectively tests the contact resistance between the inserted and extracted terminals, wherein the test results are shown in table 5.

The method for testing the plug-in success rate comprises the following steps: each charging terminal, which has the pressure value applied to the outer wall of the insertion section 201 by the inner wall of the locking ring 301, is inserted into the corresponding 100 insertion terminals with the same eccentricity, and the number of successful insertion is recorded and multiplied by 100% in comparison with the total number. In the present embodiment, the success rate of the pair insertion is less than 95%.

Table 5: effect of different pressures on contact resistance and on insertion success rates

As can be seen from table 5, when the pressure applied to the outer wall of the insertion section 201 by the locking ring 301 is less than 5N, although the success rate of the opposite insertion is acceptable, the contact resistance between the opposite insertion terminal and the terminal 20 is greater than 1m Ω, and the contact resistance is too large; when the pressure of the locking ring 301 applied to the outer wall of the insertion section 201 is greater than 100N, the application requirement cannot be satisfied for the insertion success rate less than 95%, and therefore, the inventors set the pressure of the locking ring 301 applied to the outer wall of the insertion section 201 to be 5N-100N.

In a preferred embodiment, when the charging gun head 40 is pulled out from the charging seat, the push rod 303 drives the locking ring 301 to move away from the base 10 under the elastic force of the elastic body 304, the inner wall of the locking ring 301 is separated from the outer wall of the insertion section 201, and the insertion section 201 expands the diameter of the insertion cavity 202 under the self-elastic force.

In order to verify the influence of the elastic force of the elastic body 304 on the contact resistance of the plugging structure, the inventor selects the base 10 and the terminal 20 with the same size specification, applies different pressures to the outer wall of the plugging section 201 from the inner wall of the locking ring 301, then selects the same plugging terminal and the terminal 20 for plugging, tests the contact resistance between the plugged terminals respectively, and tests the successful plugging ratio of the plugging terminal in multiple plugging experiments, wherein the test results are shown in table 6.

The contact resistance test method comprises the following steps: using the micro-resistance meter, one end of the measuring end of the micro-resistance meter is placed on the opposite-insertion end terminal, and the other end is placed on the terminal 20, and the position where each measurement is placed is the same, and then the contact resistance reading on the micro-resistance meter is read. In this example, a contact resistance of more than 1m Ω is not acceptable.

Table 6: influence of elastic force of the elastic body 304 on contact resistance

As can be seen from table 6, when the elastic force of the elastic body 304 is less than 5N, the contact resistance is greater than 1m Ω, and the contact resistance is too large; when the elastic force of the elastic body 304 is larger than 95N, the contact resistance is larger than 1m omega, and adverse effects such as burning of parts of automobile parts due to overlarge contact resistance and overhigh temperature rise are easily caused in use. Therefore, the inventors set the elastic force of the elastic body 304 to be in the range of 5N to 95N.

Example four:

the utility model also provides a motor vehicle, including the aforesaid charging seat, and the aforesaid charging device. When motor vehicle's charging seat charges, can make female terminal automatic locking when male terminal and female terminal are to inserting, guarantee female terminal and male terminal area of contact when inserting, reduce the contact resistance to inserting the structure, reduce because the risk that the spare part damage that the structure temperature rise of inserting too high produced even the vehicle burns out.

The utility model discloses do not have extra driving system, rely on the rifle male power of charging to realize terminal locking, rely on the elastomer to realize that the terminal loosens, simple structure, the fault rate is low.

Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. An automatic locking charging seat, characterized in that includes:

the terminal device comprises a base body, wherein at least one terminal cylinder is arranged on the base body;

a terminal having an insertion section of varying diameter, at least a portion of the insertion section disposed inside the terminal barrel, the insertion section forming an insertion cavity therein;

a locking mechanism disposed at least partially about the periphery of the insertion section and configured to translate in the terminal axial direction and cause the diameter of the insertion cavity to decrease or increase.

2. An automatic locking charging stand according to claim 1, wherein the insertion section is conical, one end of the insertion cavity is configured to be an opening, and the diameter of the insertion cavity at the opening end is smaller than that at the end far away from the opening.

3. An auto-locking charging dock according to claim 2 wherein the ratio of the maximum diameter to the minimum diameter of the insertion cavity is in the range 1.2-2.2.

4. The charging stand according to claim 1, wherein the locking mechanism comprises a translational mechanism and an elastic body, the translational mechanism comprises at least one locking ring and a push rod, the locking ring is sleeved on the periphery of the insertion section, the push rod is arranged at one end of the locking ring close to the stand body, and the elastic body is in contact connection with the push rod.

5. An automatic locking charging seat according to claim 3, characterized in that the elastic body is elastic rubber or compression spring.

6. An automatic locking charging stand as claimed in claim 5, wherein the elastic force of said elastic body is 5N-95N.

7. An automatic locking charging stand according to claim 3, wherein said locking ring has an annular shape, and an inner diameter of said locking ring is larger than an outer diameter of said insertion section at an end of said opening and smaller than an outer diameter of said insertion section at an end thereof remote from said opening.

8. An automatic locking charging stand according to claim 3, wherein an inside of said locking ring has a taper shape, the taper of the inside of said locking ring is the same as the taper of the outer periphery of said insertion section, and when said locking ring is in a state of reducing the diameter of said insertion cavity, the inner wall of said locking ring is in contact with the outer wall of said insertion section.

9. An automatic locking charging stand according to claim 8, wherein the distance between the inner wall of said locking ring and the outer wall of said inserting section in the natural state is 0.01mm-5 mm.

10. An automatic locking charging stand according to any one of claims 7 or 8, wherein when said locking ring is moved from the end of said insertion section with the smaller diameter to the end of said insertion section with the larger diameter, the inner wall of said locking ring contacts and applies pressure to the outer wall of said insertion section to reduce the diameter of said insertion cavity.

11. An automatic locking charging stand according to claim 10, wherein the pressure applied by the inner wall of said locking ring to the outer wall of said insertion section is 5N-100N.

12. A charging stand according to any one of claims 7 or 8 wherein when the locking ring is moved from the end of the insertion section with the larger diameter to the end of the insertion section with the smaller diameter, the inner wall of the locking ring disengages from the outer wall of the insertion section, and the insertion section expands the diameter of the insertion cavity under its own resilience.

13. An automatic locking charging stand, according to claim 4, wherein said translation mechanism further comprises at least one connecting rod, one end of said connecting rod is connected to said locking ring, and the other end is connected to said push rod.

14. The charging stand for automatic locking according to claim 13, wherein the number of the connecting rods is plural, and the plural connecting rods are arranged along the circumference of the locking ring.

15. An automatic locking charging stand as claimed in claim 13, wherein there are a plurality of said connecting rods, and said plurality of said connecting rods are uniformly distributed along the circumference of said locking ring.

16. A charging cradle according to claim 13, wherein the locking mechanism is integrally formed.

17. The charging stand according to claim 13, wherein the inner side wall of the terminal cylinder is provided with at least one sliding slot, the sliding slot is arranged along the axial direction of the terminal cylinder, and the translation mechanism slides in the sliding slot.

18. An automatic locking charging stand according to claim 17, wherein said sliding slot is disposed opposite to said connecting rod, and said connecting rod slides in said sliding slot.

19. The charging stand for automatic locking according to claim 17, wherein the sliding slot is provided with a sliding slot opening at one end near the base body, and the push rod extends from the sliding slot opening to the outside of the side wall of the terminal cylinder.

20. The charging stand for automatic locking according to claim 19, wherein one end of the elastic body is disposed on the stand body, and the other end of the elastic body abuts against the push rod.

21. An automatic locking charging stand as claimed in claim 13, wherein said side wall of said insertion section is provided with at least one slot, said slot is arranged along the axial direction of said insertion section, and said slot is not closed at one end of said opening.

22. An auto-locking charging stand as claimed in claim 21, wherein said slot is aligned with said connecting rod, said connecting rod sliding within said slot.

23. An auto-locking charging dock according to claim 21 wherein said slot is aligned with said push rod, said push rod sliding within said slot, said push rod extending from said slot into said insertion cavity.

24. The charging stand for automatic locking according to claim 23, wherein one end of the elastic body is disposed at the bottom of the insertion cavity, and the other end of the elastic body abuts against the push rod.

25. A charging unit comprising a charging dock according to any one of claims 1 to 24 and a complementary charging gun, wherein the charging gun comprises a charging gun head and a charging gun terminal disposed within the charging gun head, the charging gun head is insertable into the charging dock and the charging gun terminal is insertable into the terminal.

26. The charging device according to claim 25, wherein when the charging lance head is inserted into the charging seat, the terminal barrel is inserted into the charging lance head, the charging lance head pushes the push rod to drive the locking mechanism to move towards the seat body, and the locking mechanism reduces the diameter of the insertion cavity.

27. A charging device as claimed in claim 25, wherein when the charging gun head is inserted into the charging seat, the charging gun terminal is inserted into the insertion cavity, and pushes the push rod to drive the locking mechanism to move towards the seat body, and the locking mechanism reduces the diameter of the insertion cavity.

28. A charging arrangement as claimed in any of claims 26 to 27, in which the push rod compresses the elastomer and moves the locking ring towards the housing, the inner wall of the locking ring applying pressure to the outer wall of the insertion section to cause the diameter of the insertion cavity to decrease.

29. A charging arrangement as claimed in claim 28, in which the inner wall of the locking ring applies a pressure of 5-100N to the outer wall of the insertion section.

30. A charging arrangement as claimed in any of claims 26 to 27, in which, when the charging lance head is withdrawn from the charging cradle, the push rod is under the action of the resilient force of the resilient body to drive the locking ring to move in a direction away from the cradle body, the inner wall of the locking ring is disengaged from the outer wall of the insertion section, and the insertion section is under its own resilient action to expand the diameter of the insertion cavity.

31. A charging arrangement as claimed in claim 30, in which the resilient body has a spring force of from 5N to 95N.

32. A motor vehicle comprising a charging cradle according to any one of claims 1-24 and a charging device according to any one of claims 25-31.