CN211918362U

CN211918362U - A locking mechanical system, quick change bracket component and electric automobile for battery package

Info

Publication number: CN211918362U
Application number: CN201922499851.6U
Authority: CN
Inventors: 张建平; 黄春华
Original assignee: Aulton New Energy Automotive Technology Co Ltd
Current assignee: Aulton New Energy Automotive Technology Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-13
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a locking mechanism, quick change bracket component and electric automobile for battery package. The locking mechanism comprises a lock base and a lock tongue, the lock base is provided with an opening and a cavity, and the opening is used for allowing a lock shaft of the battery pack to enter the cavity; the latch bolt is rotatable relative to the lock base to switch between an unlocked state and a locked state. The spring bolt includes spring bolt body, first spring bolt expansion portion and the second spring bolt expansion portion that the end to end connects gradually, and when being in the locking state, this physical stamina of spring bolt prevents the lock axle and leaves the cavity, and the spring bolt body is located the lock base, and first and second spring bolt expansion portion is located outside the lock base. Along the thickness direction of the lock base, at least one end of the second bolt expanding portion extends out of the first bolt expanding portion. The second spring bolt expansion part increases the contact area of the spring bolt and the positioning fork, and can reduce the possibility that the positioning fork is staggered relative to the spring bolt, so that the positioning fork is not easy to be forked into side seams at two sides of the spring bolt, and the success rate of once power changing can be improved.

Description

A locking mechanical system, quick change bracket component and electric automobile for battery package

Technical Field

The utility model relates to an electric automobile field, in particular to a locking mechanism, quick change bracket component and electric automobile for battery package.

Background

The locking mechanism is arranged on the quick-change bracket and is an important structure for arranging the battery pack on the quick-change bracket. The locking mechanism comprises a lock base and a lock tongue, and when the battery is replaced, a positioning fork on the battery replacing equipment is matched with the lock tongue to unlock the locking mechanism. For the locking mechanism in the prior art, when the positioning fork is matched with the lock tongue, the arc area is matched with the arc area, the actual contact surface is small, and in the process of changing the power, the positioning fork is easy to be dislocated relative to the lock tongue, so that the positioning fork is easy to be forked into side seams at two sides of the lock tongue (one side seam is formed by the lock tongue and a battery pack, and the other side seam is formed by the lock tongue and a quick-change support), and the success rate of once power changing is influenced.

In summary, the locking mechanism in the prior art has a defect that the locking tongue is easily dislocated with the positioning fork when being matched with the positioning fork, so that the success rate of once power exchanging is affected.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is that easily take place the dislocation and influence the defect of once trading the electric success rate with the location fork when having the spring bolt and the cooperation of location fork in order to overcome locking mechanism among the prior art, provide a locking mechanism, quick change bracket component and electric automobile for battery package.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme:

a locking mechanism for a battery pack comprises a lock base and a lock tongue, wherein the lock base is provided with an opening and a cavity extending from the opening, and the opening is used for allowing a lock shaft mounted on the battery pack to enter the cavity; the lock bolt is characterized in that the lock bolt comprises a lock bolt body, a first lock bolt expanding portion and a second lock bolt expanding portion which are sequentially connected end to end, when the lock bolt is in the locking state, the lock bolt body can prevent the lock shaft from leaving the cavity from the opening, the lock bolt body is positioned in the lock base, and the first lock bolt expanding portion and the second lock bolt expanding portion are positioned outside the lock base;

at least one end of the second bolt expanding portion extends out of the first bolt expanding portion along the thickness direction of the lock base.

In the scheme, the second lock tongue expansion part extends out of the first lock tongue expansion part, when the power is required to be changed, the second lock tongue expansion part is matched with the positioning fork, compared with the prior art, the part, extending out of the first lock tongue expansion part, of the second lock tongue expansion part increases the contact area of the lock tongue and the positioning fork, the possibility that the positioning fork is staggered relative to the lock tongue can be reduced, the positioning fork is difficult to fork into a side seam formed by the lock tongue and a battery pack and/or a quick-change support, and therefore the success rate of one-time power changing can be improved.

Preferably, the second bolt expansion extends at most to be aligned with an outer edge of the lock base in a thickness direction of the lock base.

In this embodiment, one side surface (hereinafter referred to as "first side surface") of the lock base is adapted to be mounted on the quick-change holder, and the other side surface (hereinafter referred to as "second side surface") of the lock base is adapted to face the battery pack. Wherein, if extend first side with the corresponding second spring bolt extension of first side, then the second spring bolt extension can make the space that locking mechanism occupy great to second spring bolt extension still influences the installation of lock base and quick change support easily. If the second bolt expansion part corresponding to the second side surface extends out of the second side surface, the second bolt expansion part can enable the space occupied by the locking mechanism to be larger, and the second bolt expansion part can easily clamp the battery pack, so that the success rate of battery replacement can be influenced.

Preferably, the first bolt expanding portion extends from both ends of the second bolt expanding portion along the thickness direction of the lock base.

In this scheme, adopt above-mentioned structural setting, when locking mechanism and location fork cooperation, compare in prior art, the both ends of second spring bolt extension portion all have great area of contact with the location fork to can further make the location fork be difficult for taking place the dislocation with second spring bolt extension portion, the location fork is difficult for pitching the side seam of spring bolt both sides in, be favorable to further improving the success rate of once trading the electricity.

Preferably, the parts of the two ends of the second bolt expansion part, which extend out of the first bolt expansion part, are a first extension part and a second extension part respectively, and the cross-sectional shapes of the first extension part and the second extension part are the same.

In this scheme, adopt above-mentioned structural setting, first extension and second extension are the same with the cross-sectional shape when the location fork is mated, are favorable to reducing the requirement to the location fork, are favorable to realizing that location fork and second spring bolt expansion portion cooperate comparatively reliably, correspondingly, also are favorable to improving the success rate that trades the electricity.

Preferably, the first extension portion and the second extension portion are symmetrically disposed about a central axis of the first tongue extending portion.

In this scheme, adopt above-mentioned structure setting, be favorable to further reducing the requirement to the location fork, and then be favorable to guaranteeing the reliable cooperation of location fork and second spring bolt expansion portion, be favorable to further improving the success rate of trading the electricity.

Preferably, one end of the second bolt expansion part, which is far away from the first bolt expansion part, is an arc-shaped part, and the arc-shaped parts are uniformly distributed along the thickness direction of the lock base.

In this scheme, adopt above-mentioned structural setting, the part that extends first spring bolt expansion portion in the second spring bolt expansion portion and the part that corresponds with first spring bolt expansion portion are the same arc portion to make along the thickness direction of lock base, the fitting surface of second spring bolt expansion portion and location fork is the same completely, is favorable to reducing the requirement to the location fork, is favorable to improving the location fork and the second spring bolt expansion portion complex reliability, and then is favorable to improving the success rate that once trades the electricity.

Preferably, one end of the second bolt expansion part, which is close to the first bolt expansion part, is of a planar structure.

Preferably, the first bolt expansion part and the second bolt expansion part are integrally formed.

In this scheme, adopt above-mentioned structure setting, the shaping mode of spring bolt is comparatively simple, and need not extra indirect structure or connected mode between first spring bolt extension portion and the second spring bolt extension portion and just can realize reliable joint, has both improved the reliability of spring bolt, has reduced the space and the whole weight that locking mechanism occupy again.

Preferably, when the lock tongue is in the locked state, the lowest point of one end of the second lock tongue extending portion, which is far away from the first lock tongue extending portion, is located above the lowest point of the lock tongue body, or the lowest point of one end of the second lock tongue extending portion, which is far away from the first lock tongue extending portion, and the lowest point of the lock tongue body are located on the same horizontal line.

In this scheme, if the position of the minimum of second spring bolt extension portion is crossed lowly, then adopt location fork and the cooperation of second spring bolt extension portion for when location fork acts on second spring bolt extension portion in order to realize the unblock to the battery package, the motion stroke of spring bolt is too big, can make the unblock need the time of a specified duration, thereby influences the efficiency of trading the electricity easily.

Preferably, the first bolt expansion portion is of a bent structure and comprises a first bent portion and a second bent portion, the first bent portion is connected between the bolt body and the second bent portion, and one end, far away from the first bent portion, of the second bent portion is connected to the second bolt expansion portion.

In this scheme, adopt above-mentioned structure setting, lock base can realize spacing to the spring bolt through the cooperation with first kink, prevents that the spring bolt from continuing to rotate along the locking direction.

Preferably, when the bolt body is in the locked state, the first bending part is attached to the top of the lock base, the second bending part extends along the side wall of the lock base, a gap is formed between the second bending part and the side wall of the lock base, and the range of the gap is 0-5 mm.

In this scheme, the clearance that forms between the lateral wall of second kink and lock base is favorable to preventing that the spring bolt from being blocked by the lock base, is favorable to further improving the reliability of trading the electricity. If the clearance is too large, the locking mechanism can occupy a larger space, and the space utilization rate of the quick-change support is lower. In addition, the space on the quick-change support is limited, and if a single locking structure occupies more space, the installation of other structures (such as a positioning mechanism for positioning the battery pack) or the installation number of the locking mechanisms can be influenced, so that the installation reliability of the battery pack can be reduced, and the success rate of battery replacement can be influenced. It should be noted that the space occupied by the locking mechanism is large, which also results in a large size of the positioning fork cooperating with the locking mechanism.

Preferably, an included angle is formed between the first bending part and the second bending part, and the included angle is greater than or equal to 90 degrees and smaller than 180 degrees.

Preferably, the locking mechanism further comprises a reset component, two ends of the reset component are respectively connected to the lock base and the first bolt expansion portion, and the reset component can elastically deform and is used for enabling the bolt to rotate in the locking direction to reset from the unlocking state to the locking state.

In this scheme, set up reset unit and be convenient for the spring bolt from the unblock state to the locking state that resets for battery package installation, locking are all comparatively convenient, and under reset unit's effect, and the spring bolt can not change easily for the unblock state, and the locking is more reliable.

Preferably, the locking mechanism further comprises a resilient member at least partially located within the cavity;

the elastic component comprises an elastic pad, an elastic handle part and an elastic head part which are sequentially connected, the elastic pad is located in the cavity and used for being abutted to the lock shaft, the elastic handle part penetrates through the lock base, and the wall part of the lock base is clamped between the elastic pad and the elastic head part.

In this scheme, adopt above-mentioned structure setting, the cushion can prevent lock axle and lock base rigidity striking, and in addition, elastomeric element can install in the lock base firmly. Among them, the elastic member is preferably made of rubber.

The utility model also provides a quick change bracket component, including the quick change support, its characteristics lie in, the quick change bracket component still includes at least one above-mentioned locking mechanism who is used for the battery package, locking mechanism connect in the inside wall of quick change support.

Preferably, when the bolt body is in the locked state, along the thickness direction of the lock base, a gap between one end of the second bolt expansion portion adjacent to the quick-change bracket and the inner side wall of the quick-change bracket is greater than 0mm and less than or equal to 3mm, and a gap between one end of the second bolt expansion portion adjacent to the battery pack and the outer side wall of the battery pack is greater than 0mm and less than or equal to 3 mm.

In this scheme, adopt above-mentioned structure setting, when location fork and locking mechanism cooperate, second spring bolt extension portion can enough prevent more reliably that location fork and spring bolt from taking place the dislocation, can not influence the installation of locking mechanism and quick change support again, also can not influence the installation of battery package.

Preferably, the quick-change bracket is provided with two oppositely-arranged connecting beams, the number of the locking mechanisms is two, and the two locking mechanisms are oppositely arranged and respectively arranged on the inner side walls of the two connecting beams.

In this scheme, the both sides of battery package are provided with locking mechanism relatively, are favorable to guaranteeing steady, the reliable installation of battery package, and then are favorable to improving the success rate of trading the electricity.

The utility model also provides an electric automobile, its characteristics lie in, it includes above-mentioned quick change bracket component.

On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.

The utility model discloses an actively advance the effect and lie in:

in the locking mechanism, the second lock tongue expansion part extends out of the first lock tongue expansion part, when power is required to be changed, the second lock tongue expansion part is matched with the positioning fork, compared with the prior art, the part, extending out of the first lock tongue expansion part, of the second lock tongue expansion part increases the contact area of the lock tongue and the positioning fork, the possibility that the positioning fork is staggered relative to the lock tongue can be reduced, the positioning fork is difficult to fork into a side seam formed by the lock tongue, a battery pack and/or a quick-change support, and therefore the success rate of one-time power changing can be improved.

Drawings

Fig. 1 is a schematic structural diagram of a locking mechanism for a battery pack according to a preferred embodiment of the present invention.

Fig. 2 is another schematic structural diagram of a locking mechanism for a battery pack according to a preferred embodiment of the present invention.

Fig. 3 is a schematic partial structural view of a locking mechanism for a battery pack according to a preferred embodiment of the present invention, in which the second tongue extending portion is not shown.

Fig. 4 is a schematic structural view of a locking mechanism for a battery pack according to a preferred embodiment of the present invention, which is engaged with a positioning fork.

Fig. 5 is a schematic structural diagram of a latch tongue in a locking mechanism for a battery pack according to a preferred embodiment of the present invention.

Description of reference numerals:

10 lock base

101 opening

102 cavity

20 bolt

201 bolt body

202 first lock tongue expansion part

203 second bolt expansion part

204 first extension part

205 second extension part

206 first bending part

207 second bending part

30 reset device

40 resilient member

401 elastic cushion

402 elastic handle

403 elastic head

50 positioning fork

Detailed Description

The present invention will be further described by way of examples with reference to the accompanying drawings, but the present invention is not limited thereto.

The present embodiment discloses a locking mechanism for a battery pack, as shown in fig. 1-5, the locking mechanism includes a lock base 10 and a locking tongue 20, the lock base 10 has an opening 101 and a cavity 102 extending from the opening 101, the opening 101 is used for allowing a lock shaft mounted on the battery pack to enter the cavity 102; the latch tongue 20 is rotatable with respect to the lock base 10 to switch between an unlocked state and a locked state. The lock tongue 20 comprises a lock tongue body 201, a first lock tongue expansion portion 202 and a second lock tongue expansion portion 203 which are sequentially connected end to end, when the lock tongue 20 is in a locking state, the lock tongue body 201 can prevent a lock shaft from leaving the cavity 102 from the opening 101, the lock tongue body 201 is located in the lock base 10, and the first lock tongue expansion portion 202 and the second lock tongue expansion portion 203 are located outside the lock base 10. At least one end of the second bolt expansion portion 203 extends out of the first bolt expansion portion 202 along the thickness direction of the lock base 10.

In this embodiment, the second tongue extending portion 203 extends out of the first tongue extending portion 202, and when power is required to be changed, the second tongue extending portion 203 is matched with the positioning fork 50, compared with the prior art, the part of the second tongue extending portion 203 extending out of the first tongue extending portion 202 increases the contact area between the tongue 20 and the positioning fork 50, so that the possibility that the positioning fork 50 is dislocated relative to the tongue 20 can be reduced, the positioning fork 50 is not easily forked into a side seam formed by the tongue 20 and a battery pack and/or a quick-change bracket, and therefore, the success rate of once power changing can be improved. It should be noted that, with the above-mentioned structure, even if the positioning fork 50 is misaligned to a certain extent relative to the second tongue extending portion 203, under the effect of the portion of the second tongue extending portion 203 extending out of the first tongue extending portion 202, the positioning fork 50 is not easy to, or even does not, fork into the side seam between the tongue 20 and the battery or the quick-change bracket.

In the present embodiment, as will be understood with reference to fig. 1 to 5, the first bolt expansion 202 extends from both ends of the second bolt expansion 203 in the thickness direction of the lock base 10.

When the locking mechanism is matched with the positioning fork 50, compared with the prior art, the two ends of the second bolt expansion portion 203 have larger contact areas with the positioning fork 50, so that the positioning fork 50 is not easy to be dislocated with the second bolt expansion portion 203, the positioning fork 50 is not easy to be forked into side seams on two sides of the bolt 20, and the success rate of once power exchanging is further improved.

As will be further understood by referring to fig. 1 to 5, the portions of the two ends of the second bolt expansion portion, which extend out of the first bolt expansion portion 202, are a first extension portion 204 and a second extension portion 205, respectively, and the cross-sectional shapes of the first extension portion 204 and the second extension portion 205 are the same. With such an arrangement, the first extension portion 204 and the second extension portion 205 have the same cross-sectional shape when being matched with the positioning fork 50, which is beneficial to reducing the requirement on the positioning fork 50, and is beneficial to realizing that the positioning fork 50 and the second bolt expansion portion 203 are reliably matched, and accordingly, the success rate of battery replacement is also beneficial to being improved.

In fact, in the present embodiment, the first extension portion 204 and the second extension portion 205 are provided symmetrically with respect to the central axis of the first tongue extending portion 202. So set up, be favorable to further reducing the requirement to location fork 50, and then be favorable to guaranteeing the reliable cooperation of location fork 50 and second spring bolt expansion portion 203, be favorable to further improving the success rate of trading the electricity.

It should be noted that, in other alternative embodiments, the first extension portion 204 and the second extension portion 205 may be configured with different cross-sectional shapes, or the first extension portion 204 and the second extension portion 205, although having the same cross-sectional shape, have different sizes, that is, are not symmetrically disposed about the central axis of the first tongue extending portion 202.

Regarding the extension range of the second tongue extending portion 203, the present embodiment is configured as follows: the second tongue expanding portion 203 extends at most to be aligned with the outer edge of the lock base 10 in the thickness direction of the lock base 10.

One side surface (hereinafter referred to as "first side surface") of the lock base 10 is used to be mounted on the quick-change holder, and the other side surface (hereinafter referred to as "second side surface") of the lock base 10 is used to face the battery pack. Wherein, if the second bolt expansion portion 203 corresponding to the first side extends out of the first side, the second bolt expansion portion 203 may make the space occupied by the locking mechanism larger, and the second bolt expansion portion 203 also easily affects the installation of the lock base 10 and the quick-change bracket. If the second bolt expansion portion 203 corresponding to the second side surface extends out of the second side surface, the second bolt expansion portion 203 can enable the space occupied by the locking mechanism to be large, and the second bolt expansion portion 203 can easily clamp the battery pack, so that the success rate of battery replacement can be affected.

As will be further understood by referring to fig. 1 to 5, the end of the second expanded bolt 203 far from the first expanded bolt 202 is an arc-shaped part, and the arc-shaped parts are uniformly distributed along the thickness direction of the lock base 10.

So set up, the part that extends first spring bolt expansion portion 202 in the second spring bolt expansion portion 203 and the part corresponding with first spring bolt expansion portion 202 are the same arc portion to make along the thickness direction of lock base 10, the fitting surface of second spring bolt expansion portion 203 and location fork 50 is identical, be favorable to reducing the requirement to location fork 50, be favorable to improving location fork 50 and second spring bolt expansion portion 203 complex reliability, and then be favorable to improving the success rate of once trading.

Specifically, in the present embodiment, one end of the second expanded latch tongue 203 close to the first expanded latch tongue 202 is a planar structure.

In the present embodiment, the first expanded latch tongue 202 and the second expanded latch tongue 203 are integrally molded. Due to the arrangement, the forming mode of the lock tongue 20 is simple, and reliable connection can be realized between the first lock tongue extending portion 202 and the second lock tongue extending portion 203 without an additional indirect structure or a connection mode, so that the reliability of the lock tongue 20 is improved, and the space and the overall weight occupied by the locking mechanism are reduced.

It should be noted that, in other alternative embodiments, the first bolt expansion portion 202 and the second bolt 20 expansion portion may also be connected together through a connection structure, and may be configured to be detachably connected (e.g., through a screw, a nut, etc.) or fixedly connected (e.g., welded).

Further, in the present embodiment, when the tongue 20 is in the locked state, the lowest point of the second tongue extending portion 203 at the end distant from the first tongue extending portion 202 is located above the lowest point of the tongue body 201. In other alternative embodiments, it is also possible to provide: the lowest point of one end of the second expanded bolt 203 far away from the first expanded bolt 202 is at the same horizontal line with the lowest point of the bolt body 201.

If the position of the lowest point of the second bolt expansion portion 203 is too low, the positioning fork 50 is matched with the second bolt expansion portion 203, so that when the positioning fork 50 acts on the second bolt expansion portion 203 to unlock the battery pack, the movement stroke of the bolt 20 is too large, the unlocking time needs to be longer, and the battery replacement efficiency is easily affected.

As shown in fig. 1 to 5, the first tongue extending portion 202 is a bent structure and includes a first bent portion 206 and a second bent portion 207, the first bent portion 206 is connected between the tongue body 201 and the second bent portion 207, and one end of the second bent portion 207, which is far away from the first bent portion 206, is connected to the second tongue extending portion 203. When the latch bolt body 201 is in the locked state, the first bending portion 206 is attached to the top of the lock base 10, the second bending portion 207 extends along the sidewall of the lock base 10, and a gap is formed between the second bending portion 207 and the sidewall of the lock base 10, and the range of the gap is 0-5 mm.

Wherein, lock base 10 can realize spacing to spring bolt 20 through the cooperation with first kink 206, prevents that spring bolt 20 from continuing to rotate along the locking direction. The gap formed between the second bending portion 207 and the sidewall of the lock base 10 is beneficial to preventing the locking tongue 20 from being blocked by the lock base 10, and is beneficial to further improving the reliability of power exchange.

Note that, as described above, the gap is preferably set to not more than 5 mm. Wherein, if the clearance is too big, then can make locking mechanism occupy great space for the space utilization of quick change support is lower. In addition, the space on the quick-change support is limited, and if a single locking structure occupies more space, the installation of other structures (such as a positioning mechanism for positioning the battery pack) or the installation number of the locking mechanisms can be influenced, so that the installation reliability of the battery pack can be reduced, and the success rate of battery replacement can be influenced. It should be noted that the space occupied by the locking mechanism is relatively large, which also results in a relatively large size of the positioning fork 50 that cooperates with the locking mechanism.

As will be understood with reference to fig. 1-4, an included angle is formed between the first bent portion 206 and the second bent portion 207, and in the present embodiment, the included angle is 90 degrees. In other alternative embodiments, the included angle may take any value greater than 90 degrees and less than 180 degrees. In other alternative embodiments, a surface of the second bending portion 207 contacting the lock base 10 is a curved surface.

As shown in fig. 1 to 4, the locking mechanism further includes a reset member 30, two ends of the reset member 30 are respectively connected to the lock base 10 and the first bolt expansion portion 202, and the reset member 30 is capable of being elastically deformed for rotating the bolt 20 in the locking direction to reset from the unlocked state to the locked state. The reset component 30 is arranged, so that the lock tongue 20 can be conveniently reset to the locking state from the unlocking state, the battery pack can be conveniently mounted and locked, the lock tongue 20 cannot be easily changed to the unlocking state under the action of the reset component 30, and the locking is more reliable.

Further, as shown in fig. 3, the locking mechanism further includes a resilient member 40, the resilient member 40 being at least partially disposed within the cavity 102. The elastic component 40 includes an elastic pad 401, an elastic handle 402 and an elastic head 403, which are connected in sequence, the elastic pad 401 is located in the cavity 102, the elastic pad 401 is used for abutting against the lock shaft, the elastic handle 402 penetrates through the lock base 10, and the wall of the lock base 10 is clamped between the elastic pad 401 and the elastic head 403. The elastic pad 401 can prevent the lock shaft from rigidly colliding with the lock base 10, and in addition, the elastic member 40 can be stably mounted to the lock base 10. Among them, the elastic member 40 is preferably made of rubber.

The present embodiment further discloses a quick-change holder assembly, which comprises a quick-change holder (not shown in the drawings) and at least one locking mechanism, which is connected to an inner side wall of the quick-change holder.

When the bolt body 201 is in a locked state, along the thickness direction of the lock base 10, a gap between one end of the second bolt expanding portion 203 adjacent to the quick-change bracket and the inner side wall of the quick-change bracket is greater than 0mm and less than or equal to 3mm, and a gap between one end of the second bolt expanding portion 203 adjacent to the battery pack and the outer side wall of the battery pack is greater than 0mm and less than or equal to 3 mm.

In this scheme, adopt above-mentioned structural setting, when location fork 50 and locking mechanism cooperate, second spring bolt extension portion 203 can enough prevent more reliably that location fork 50 and spring bolt 20 from taking place the dislocation, can not influence the installation of locking mechanism and quick change support again, also can not influence the installation of battery package.

Wherein, the quick change support has the tie-beam of two relative settings, and locking mechanism's quantity is two, and two locking mechanism set up relatively and set up the inside wall at two tie-beams respectively. In this embodiment, the both sides of battery package are provided with locking mechanical system relatively, are favorable to guaranteeing steady, the reliable installation of battery package, and then are favorable to improving the success rate of trading the electricity.

It should be noted that, in the quick-change bracket assembly, the locking mechanism can be used as a secondary lock to be used in cooperation with a primary lock; the primary lock may refer to a "locking device" disclosed in chinese patent application publication No. CN 106427514A.

The embodiment also discloses an electric automobile, and this electric automobile includes above-mentioned quick change bracket component.

In the locking mechanism, the second bolt expansion part 203 extends out of the first bolt expansion part 202, when the electricity needs to be changed, the second bolt expansion part 203 is matched with the positioning fork 50, compared with the prior art, the part, extending out of the first bolt expansion part 202, of the second bolt expansion part 203 increases the contact area between the bolt 20 and the positioning fork 50, so that the possibility that the positioning fork 50 is staggered relative to the bolt 20 can be reduced, the positioning fork 50 is not prone to being crossed into a side seam formed by the bolt 20, a battery pack and a quick-change support, and therefore the success rate of once electricity changing can be improved.

Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are all within the scope of the invention.

Claims

1. A locking mechanism for a battery pack comprises a lock base and a lock tongue, wherein the lock base is provided with an opening and a cavity extending from the opening, and the opening is used for allowing a lock shaft mounted on the battery pack to enter the cavity; the lock bolt is characterized in that the lock bolt comprises a lock bolt body, a first lock bolt expanding portion and a second lock bolt expanding portion which are sequentially connected end to end, when the lock bolt is in the locking state, the lock bolt body can prevent the lock shaft from leaving the cavity from the opening, the lock bolt body is positioned in the lock base, and the first lock bolt expanding portion and the second lock bolt expanding portion are positioned outside the lock base;

2. The locking mechanism for a battery pack according to claim 1, wherein the second tongue expansion extends at most to be aligned with an outer edge of the lock base in a thickness direction of the lock base.

3. The locking mechanism for a battery pack according to claim 1, wherein the first tongue extension portion extends from both ends of the second tongue extension portion in a thickness direction of the lock base.

4. The locking mechanism for a battery pack according to claim 3, wherein the portions of the two ends of the second expanded latch tongue extending out of the first expanded latch tongue are a first extension portion and a second extension portion, respectively, and the first extension portion and the second extension portion have the same cross-sectional shape.

5. The locking mechanism for a battery pack according to claim 4, wherein the first extension portion and the second extension portion are symmetrically arranged with respect to a central axis of the first tongue extending portion.

6. The locking mechanism for a battery pack according to claim 1, wherein an end of the second tongue expansion portion, which is away from the first tongue expansion portion, is an arc-shaped portion, and the arc-shaped portions are uniformly distributed along a thickness direction of the lock base.

7. The locking mechanism for a battery pack according to claim 1, wherein an end of the second tongue expansion portion adjacent to the first tongue expansion portion has a planar structure.

8. The locking mechanism for a battery pack according to claim 1, wherein the first locking tongue expansion portion and the second locking tongue expansion portion are integrally formed.

9. The latch mechanism of claim 1, wherein when the latch bolt is in the latched state, a lowest point of an end of the second extended portion, which is far away from the first extended portion, is located above a lowest point of the latch bolt body, or a lowest point of an end of the second extended portion, which is far away from the first extended portion, and the lowest point of the latch bolt body are located at the same horizontal line.

10. The locking mechanism for a battery pack according to claim 1, wherein the first tongue extension portion is a bent structure and includes a first bent portion and a second bent portion, the first bent portion is connected between the tongue body and the second bent portion, and an end of the second bent portion, which is far away from the first bent portion, is connected to the second tongue extension portion.

11. The locking mechanism of claim 10, wherein when the latch body is in the locked state, the first bending portion is attached to the top of the lock base, the second bending portion extends along the side wall of the lock base, and a gap is formed between the second bending portion and the side wall of the lock base, and the gap is in a range of 0-5 mm.

12. The locking mechanism of claim 10, wherein an included angle is formed between the first bending portion and the second bending portion, and the included angle is greater than or equal to 90 degrees and less than 180 degrees.

13. The lock mechanism for a battery pack according to claim 1, further comprising a reset member having both ends connected to the lock base and the first latch expansion portion, respectively, the reset member being elastically deformable for rotating the latch in a locking direction to reset from the unlocked state to the locked state.

14. The locking mechanism for a battery pack, as recited in any of claims 1-13, further comprising a resilient member at least partially positioned within the cavity;

15. A quick-change cradle assembly comprising a quick-change cradle, wherein the quick-change cradle assembly further comprises at least one locking mechanism for a battery pack as claimed in any one of claims 1 to 14, the locking mechanism being attached to an inside wall of the quick-change cradle.

16. The quick-change bracket assembly according to claim 15, wherein, when the bolt body is in the locking state, a gap between one end of the second bolt expansion part adjacent to the quick-change bracket and the inner side wall of the quick-change bracket is greater than 0mm and less than or equal to 3mm, and a gap between one end of the second bolt expansion part adjacent to the battery pack and the outer side wall of the battery pack is greater than 0mm and less than or equal to 3mm along the thickness direction of the lock base.

17. The quick-change bracket assembly according to claim 15, wherein the quick-change bracket has two oppositely disposed coupling beams, the number of the locking mechanisms is two, and the two locking mechanisms are oppositely disposed and respectively disposed on the inner side walls of the two coupling beams.

18. An electric vehicle, characterized in that it comprises a quick-change bracket assembly according to any one of claims 15 to 17.