CN213705144U

CN213705144U - Lock base and locking mechanism

Info

Publication number: CN213705144U
Application number: CN202022224002.2U
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: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-07-16
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a lock base and a locking mechanism, wherein the lock base comprises a base body and a lock tongue; the base body is provided with a locking groove; the lock tongue is rotatably arranged on the base body and is switched between a locking state and an unlocking state. The spring bolt comprises a fixed end and a rotating end, and the fixed end of the spring bolt is connected to the base body through a first rotating shaft; the rotating end can rotate around the fixed end and is used for driving the lock tongue to rotate around the fixed end under the driving of external force; the rotating end is always positioned on the same side of the fixed end. The utility model discloses a rotationally locate the base body with the stiff end of spring bolt through first pivot to utilize the external force drive rotation axis to realize that the spring bolt rotates around the stiff end, realized the spring bolt business turn over locked groove reliably. The locking end and the rotating end are located on the same side of the fixed end, and when the locking state or the unlocking state is achieved, the lock tongue rotates under the action of self gravity, so that the locking state is converted, the lock tongue can be prevented from being accidentally switched to the unlocking state, and the reliability of the lock base is improved.

Description

Lock base and locking mechanism

Technical Field

The utility model relates to an electric automobile field, in particular to lock base and locking mechanism.

Background

The conventional battery installation methods of electric vehicles are generally classified into a fixed type and a replaceable type, wherein the fixed type battery pack is generally fixed on a vehicle, and the vehicle is directly used as a charging object during charging. The replaceable battery pack is generally fixed to a bracket of the vehicle in a movable mounting manner, and the replaceable battery pack can be removed to be replaced or charged independently and then mounted on the vehicle after the replacement battery pack is charged.

In the prior art, a battery pack is usually required to be locked on an electric automobile by a locking device. The battery pack is usually provided with a lock shaft, and the electric automobile is correspondingly provided with a lock base. In the locking process of the battery pack, the lock shaft of the battery pack can be inserted into the lock groove of the lock base, and then the lock shaft is fixed in the lock groove by the aid of the lock tongue on the lock base, so that the battery pack is locked relative to the electric automobile. In the unlocking process of the battery pack, the lock tongue of the unlocking base can be unlocked, and then the lock shaft is separated from the lock groove of the unlocking base, so that the battery pack is unlocked relative to the electric automobile. For example, in the scheme disclosed in chinese patent application with publication No. CN106427514A and application No. CN201611041220.4, in the prior art, when the lock link drives the lock tongue to rotate to the unlocked state, the lock tongue is easy to rotate excessively, and under the action of the self gravity of the lock tongue and the spring tension, the lock tongue is easy to be unable to return to the locked state, thereby causing the lock failure.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is in order to overcome the locking process and the unblock in-process of above-mentioned battery package among the prior art, the spring bolt of lock base easily rotates the defect that excessively leads to unable reseing, provides a lock base and locking mechanism.

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

a lock base is arranged on an electric automobile and used for being matched with a lock shaft on a battery pack of the electric automobile so as to lock the battery pack at the bottom of the electric automobile, and the lock base comprises a base body and a lock tongue;

the base body is provided with a locking groove which is inwards recessed from the side surface of the base body, the locking groove is used for allowing the locking shaft to enter and lock the locking shaft, the locking base is provided with an opening, and the opening is used for allowing the locking shaft to enter and exit the locking groove;

the lock bolt is rotatably arranged on the base body and is switched between a locking state and an unlocking state, and when the lock bolt is in the locking state, the lock bolt can extend into the lock groove from one side of the lock groove so as to close the opening of the lock shaft which enters and exits the lock groove; when the lock tongue is in an unlocking state, the lock tongue can exit from the lock groove from one side of the lock groove so as to open the opening of the lock shaft entering and exiting the lock groove;

the lock tongue comprises a fixed end and a rotating end, and the fixed end of the lock tongue is connected to the base body through a first rotating shaft; the rotating end extends towards the outside of the base body, can rotate around the fixed end, and is used for driving the lock tongue to rotate around the fixed end under the driving of external force;

in the process of switching the lock tongue between the locking state and the unlocking state, the rotating end is always positioned on the same side of the fixed end.

In this scheme, through the base body rotationally of locating through the stiff end with the spring bolt through first pivot to utilize external force drive rotation axis to realize that the spring bolt rotates around the stiff end, simply, realized the spring bolt business turn over locked groove reliably. The locking end and the rotating end are located on the same side of the fixed end all the time, and when the locking state or the unlocking state is achieved, the lock tongue can rotate under the action of self gravity, so that the locking state is converted, the lock tongue can be prevented from being accidentally switched to the unlocking state, and the reliability of the lock base is improved. If at the spring bolt rotation in-process, the rotation end removes to the other side of stiff end, and under the effect of spring bolt self gravity and spring reset piece, the spring bolt easily rotates to the direction opposite with the locking direction, and the spring bolt can't reset to the locking state promptly, leads to the locking inefficacy.

Preferably, when the lock tongue is in the locked state, the axis of the first rotating shaft is higher than the axis of the lock shaft located in the lock groove.

In this scheme, when the spring bolt was in the locking state, the axle center of first pivot was higher than the axle center that is located the lock axle of locked groove for the spring bolt can rotate downwards around the stiff end under the effect of lock axle, also makes the spring bolt further stretch into the locked groove, thereby can prevent upwards rotating because of the spring bolt accident, prevents the unexpected unblock of lock axle. In other words, electric automobile takes place acutely to rock at the in-process of traveling to lead to the relative lock base motion of lock axle, and then lead to the lock axle to exert the effort to the spring bolt, because the axle center of the first pivot of spring bolt is higher than the axle center of lock axle, this effort can lead to the trend of spring bolt downward rotation, and the direction pivoted trend that the spring bolt switches into the locking state promptly, and then improves the stability of lock axle locking in the locked groove, prevents to rotate upwards because of the spring bolt, prevents that the spring bolt accident from converting into the unblock state. Even if the electric automobile is in a bumpy state, the lock tongue is not easy to automatically unlock, and the reliability of fixing the battery pack can be improved.

Preferably, the bolt further comprises a locking end; when the lock tongue is in a locking state, the locking end is abutted against the lock shaft, and the position where the locking end is abutted against the lock shaft is positioned below the axis of the lock shaft.

In this scheme, the outer wall of locking shaft of locking end butt in the axle center below of lock shaft can prevent that the lock shaft from deviating from in the locked groove in the below of spring bolt. The lock shaft can exert an acting force on the lock tongue at least partially through the lock end, and the direction of the acting force can drive the lock tongue to move downwards, so that the lock tongue cannot rotate upwards, the lock tongue cannot be unlocked accidentally, and the reliability of the lock base can be improved.

Preferably, the contact between the locking end and the outer peripheral surface of the lock shaft is surface contact.

In this scheme, through adopting the face contact to make locking end agree with and partially cladding on the lock axle with the outer peripheral face of lock axle mutually, and then make locking end and lock axle laminate firmly, can improve the stability and the reliability of lock base.

Preferably, the locking end is provided with a round chamfer protruding toward the axis of the lock shaft, and when the lock tongue is in the locking state, the round chamfer is used for contacting the outer wall of the lock shaft below the axis of the lock shaft.

In this scheme, the circle corner cut contacts in the axle center below of lock axle the outer wall of lock axle can prevent that the lock axle from deviating from in the locked groove in the below of spring bolt. The lock shaft can exert acting force on the lock bolt at least partially through the round corner cut, and the direction of the acting force can drive the lock bolt to move downwards, so that the lock bolt cannot rotate upwards, the lock bolt is unlocked accidentally, and the reliability of the lock base can be improved.

Preferably, in the process of switching the lock tongue between the locking state and the unlocking state, the locking end and the rotating end are both located on the same side of the fixed end.

In this scheme, locking end and rotatory end lie in same one side of stiff end all the time, even consequently when the unblock state, the spring bolt also can take place to rotate under the effect of gravity to convert into the locking state, can prevent that the spring bolt from opening by mistake, improve the reliability of lock base.

Preferably, when the lock tongue is in a locked state, the locking end is located between the fixed end and the rotating end;

and/or, when the spring bolt is in the unblock state, rotatory end is located the stiff end with lock between the end.

In this scheme, when the spring bolt was in the locking state, the locking end was located between stiff end and the rotation end, and the distance of rotation end and stiff end is great this moment, and the arm of force that is exactly the rotation end for the stiff end is great, consequently, exerts the effort through rotation end pair spring bolt and can produce great moment, and this moment can produce great effort to the locking end. Therefore, if the moment forces the latch bolt to maintain the latched state, the latching end of the latch bolt of the lock base may resist a large unexpected force, in other words, a force generated to the latching end of the latch bolt by unexpected vibration of the lock shaft may hardly change the latched state of the latch bolt. Therefore, the lock tongue can be enabled to keep a locking state, and the reliability and the stability of the lock base can be improved. If this moment orders about the spring bolt and switches into the unblock state, then only need apply less effort to the rotation end, apply the effort through the rotation end and can produce great moment to the spring bolt, this moment can produce great effort to the locking end, and from this, the locking end of the spring bolt of lock base will remove under ordering about of this effort to switch into the unblock state, can improve the flexibility of lock base and the accuracy nature of controlling.

When the spring bolt is in the unblock state, rotatory end is located between stiff end and the locking end, and the rotation that also is the spring bolt takes place great angle for the stiff end promptly to make rotatory end can be located between stiff end and the locking end, and then make the spring bolt can withdraw from the locked groove more thoroughly, avoid the spring bolt to produce the removal of lock axle and interfere, can improve the reliability of lock base.

Preferably, the rotating end is provided with a through hole, the through hole is used for a second rotating shaft to pass through, the lock tongue is connected to a lock connecting rod of the electric vehicle through the second rotating shaft, the lock connecting rod is used for driving the lock tongue to switch between a locking state and an unlocking state, and when the lock tongue switches between the locking state and the unlocking state, an included angle between a connecting line between the axis of the first rotating shaft and the axis of the second rotating shaft and a horizontal plane ranges from 30 degrees to 89 degrees.

In the scheme, the included angle of the connecting line between the axis of the first rotating shaft and the axis of the second rotating shaft relative to the horizontal plane is set to be 30-89 degrees, so that the self-locking capacity of the lock tongue can be further improved in the range on the premise that the lock tongue can be stable and reliable, and the lock tongue is further prevented from being accidentally switched to the unlocking state in the locking state. The included angle is set to be 30-89 degrees, so that the lock tongue can be conveniently switched from the unlocking state to the locking state under the action of the self gravity. When the contained angle is greater than 89, the lock connecting rod easily drives the spring bolt and rotates to the direction opposite with the locking direction, makes the spring bolt can not the locking lock axle, leads to the locking inefficacy, when the contained angle is less than 30, leads to the stroke increase of lock axle along the lock connecting rod direction, and the dimensional requirement to the lock base is high.

Preferably, the lock tongue is provided with a first recess, when the lock tongue is in a locked state, the first recess extends into the lock groove, and the first recess is used for abutting against the lock shaft;

and/or the lock tongue is provided with a second recessed part, the second recessed part faces the opening of the lock groove when the lock tongue is in a locking state, the lock tongue exits the lock groove when the lock tongue is in an unlocking state, and the second recessed part faces the lock groove and avoids the lock shaft;

and/or, the spring bolt has the bellying, when the spring bolt is in the locking state, the bellying stretches into the locked groove and butt in being located the outer wall of lock axle center below.

In this scheme, through setting up the spring bolt into having first depressed part to utilize first depressed part butt lock axle when the locking state, thereby can exert the effort to the lock axle, make the lock axle along lock connecting rod length direction by spacing, avoid it to rock, and then make the lock axle can be locked by reliable and stable.

Through setting up the spring bolt into having the second depressed part to set up the second depressed part into towards the locked groove and dodge the lock axle when the spring bolt is in the unblock state, thereby can further avoid the spring bolt to interfere the removal of lock axle, can improve the smoothness nature and the convenience of lock axle business turn over locked groove, also can improve the stability and the reliability of the lock axle of locking state.

The lock bolt is provided with the protruding part, and the protruding part is used for abutting against the lock shaft, so that the lock shaft can be tightly fixed in the lock groove. Utilize the bellying to support the outer wall of lock axle center below, make the bellying and the mutual butt of lock axle of spring bolt to the lock axle can block the bellying and remove to the top in lock axle center, also the lock axle can prevent the bellying removal of spring bolt, and then can avoid the spring bolt to switch to the unblock state from the locking state accident, can improve the reliability of lock base. In other words, the bulge contacts with the outer wall below the axis, so that the direction of the acting force applied to the lock bolt by the lock shaft is obliquely downward, the lock bolt can move in the obliquely downward direction instead of upward, the lock bolt can be prevented from exiting the lock groove, and the lock shaft can be ensured to be firmly locked in the lock groove.

Preferably, the outer side surface of the first concave part is matched with the outer wall of the lock shaft;

or the first concave part is in interference fit with the lock shaft.

In this scheme, through with the lateral surface of first depressed part set up to with the outer wall phase-match of lock axle to first depressed part can be laminated with the outer wall of lock axle mutually better, and then can block the lock axle more reliable and more stable, can improve stability and reliability after the lock axle is locked.

Under the locking state, through setting up to interference fit between first depressed part and the lock axle to can further improve the compact type of laminating between first depressed part and the lock axle, also can improve the pressure of first depressed part to the lock axle, can block the lock axle more reliable and more stable, can improve stability and reliability after the lock axle is locked.

Preferably, when the lock tongue is in the unlocked state, the outer side surface of the second recess matches with the inner side surface of the lock groove.

In this scheme, when the unblock state, the medial surface phase-match of second depressed part and corresponding locked groove to the locked groove can not be blockked by the second depressed part, and the lock shaft can slide in the locked groove unimpededly, and the locked shaft can freely pass in and out the locked groove, has avoided the spring bolt to block the locked shaft and has removed. In other words, the second depressed part of spring bolt can not stretch into the locked groove, and the spring bolt can not protrusion in the locked groove, and the spring bolt withdraws from the locked groove completely, and the lock axle can freely remove in the locked groove, and the lock axle can freely pass in and out the locked groove, has avoided the spring bolt to block the lock axle and has removed, has improved the smoothness nature of lock axle business turn over locked groove.

Preferably, the protrusion is disposed between the first recess and the second recess.

In this scheme, when the spring bolt is in the locking state, locate the bellying between first depressed part and the second depressed part, can simplify the structural style of spring bolt, improve the reliability of spring bolt.

Preferably, the base body is further provided with a lock tongue groove, the lock tongue groove extends downwards from the upper side surface of the base body, the lock tongue groove is further communicated with the lock groove, and the lock tongue is rotatably arranged in the lock tongue groove.

In this scheme, through setting up the dead bolt groove and being linked together dead bolt groove and dead bolt groove, can simplify the structural style of lock base, improve the structural strength of lock base. Through locating the spring bolt in the spring bolt groove, can improve the stability and the reliability of spring bolt rotation process.

A locking mechanism for lock the battery pack on an electric automobile comprises a lock connecting rod and a plurality of lock bases, wherein the lock bases are connected with the rotating end in a rotatable mode through a second rotating shaft.

In this scheme, utilize the lock connecting rod to connect a plurality of lock bases to can realize simply, high-efficient, reliably that the spring bolt of lock base rotates's control. In addition, through setting up the lock connecting rod, can also realize the synchro control to the spring bolt of a plurality of lock bases, can realize the locking means of a plurality of spring bolts and the switching of unblock state simultaneously, can improve the synchronism and the reliability of lock base control effectively.

Preferably, the lock link is provided with a plurality of link grooves, and the rotating end is inserted into the link grooves.

In this scheme, the rotation end passes through the connecting rod groove and connects in the lock connecting rod, when simplifying the lock connecting rod, can improve stability and the smoothness nature when rotation end rotates effectively to can improve the stability and the smoothness nature that the spring bolt switches between unblock state and locking state.

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:

the utility model discloses a rotationally locate the base body with the stiff end of spring bolt through first pivot to utilize the external force drive rotation axis to realize that the spring bolt rotates around the stiff end, simple, realized spring bolt business turn over locked groove reliably. The locking end and the rotating end are located on the same side of the fixed end all the time, and when the locking state or the unlocking state is achieved, the lock tongue can rotate under the action of self gravity, so that the locking state is converted, the lock tongue can be prevented from being accidentally switched to the unlocking state, and the reliability of the lock base is improved.

Drawings

Fig. 1 is a schematic structural diagram of the locking mechanism of the present invention.

Fig. 2 is a schematic structural view of the lock base in fig. 1.

FIG. 3 is another schematic view of the lock base of FIG. 1.

Fig. 4 is a schematic view of the interior of the lock base of fig. 1, shown in a locked position.

FIG. 5 is a schematic view of the interior of the lock base of FIG. 1, shown in an unlocked position.

Fig. 6 a-6 c are schematic views illustrating the unlocking and locking principle of the locking mechanism in fig. 1.

Fig. 7 a-7 c are schematic views of the deadbolt position of the lock base of fig. 6.

Description of reference numerals:

locking mechanism 100

Lock base 10

Base body 11

Guide part 111

Guide ramp 112

Locking groove 12

Opening 13

First rotating shaft 14

Second rotating shaft 15

Latch groove 16

Lock connecting rod 17

Connecting member 171

Unlocking block 172

Elastic member 18

Spring 19

Bolt 20

First recess 21

Second recess 22

Convex portion 23

Fixed end 24

Rotating end 25

Through hole 251

Locking end 26

Round corner 27

Lock shaft 91

Line A

Horizontal plane B

Included angle C

Detailed Description

The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.

As shown in fig. 1 to 7c, the present embodiment is a locking mechanism 100 for locking a battery pack to an electric vehicle, the locking mechanism 100 includes a lock link 17 and a plurality of lock bases 10 as described below, and a rotating end 25 is rotatably connected to the lock link 17 through a second rotating shaft 15. In the present embodiment, the lock link 17 is used to connect a plurality of lock bases 10, so that the rotation of the latch bolt 20 of the lock base 10 can be simply, efficiently and reliably controlled. In addition, by providing the lock link 17, it is possible to realize synchronous control of the lock tongues 20 of the plurality of lock bases 10, to simultaneously realize switching between the lock devices and the unlock states of the plurality of lock tongues 20, and to effectively improve the synchronism and reliability of control of the lock bases 10.

As shown in fig. 1, the lock link 17 is provided with a plurality of link grooves 172, and the rotating end 25 is inserted into the link grooves 172. The rotating end 25 is connected to the lock link 17 through the link groove 172, so that the lock link 17 is simplified, and the stability and the fluency of the rotating end 25 during rotation can be effectively improved, thereby improving the stability and the fluency of the switching between the unlocking state and the locking state of the lock tongue 20.

The locking mechanism 100 of fig. 1 also shows a link member 171, the link member 171 being provided on the lock link 17, the link member 171 having a coupling hole, and a force can be applied to the lock link 17 through the link member 171 to enable the lock link 17 to be returned to the locked state. Specifically, one end of the spring may be connected to the connection hole of the connection member 171, and the other end of the spring may be connected to a region of the electric vehicle located at the lower right of the lock link 17, so that the spring applies a tensile force to the lock link 17. The lock link 17 is further provided with an unlocking block 172, and the unlocking block 172 is driven to move upwards by the unlocking mechanism, so that the lock tongue 20 is driven to rotate upwards to realize unlocking.

As shown in fig. 1 to 7c, the above-mentioned lock base 10 is shown, the lock base 10 is provided on an electric vehicle, the lock base 10 is used for cooperating with a lock shaft 91 on a battery pack of the electric vehicle to lock the battery pack to the bottom of the electric vehicle, and the lock base 10 includes a base body 11 and a lock tongue 20; the base body 11 is provided with a locking groove 12 which is recessed inwards from the side surface of the base body 11, the locking groove 12 is used for the locking shaft 91 to enter and lock the locking shaft 91, the locking base 10 is provided with an opening 13, and the opening 13 is used for the locking shaft 91 to enter and exit the locking groove 12; the locking bolt 20 is rotatably arranged on the base body 11 and is switched between a locking state and an unlocking state, when the locking bolt 20 is in the locking state, the locking bolt 20 can extend into the locking groove 12 from one side of the locking groove 12 to close the opening 13 of the locking shaft 91 which enters and exits the locking groove 12; when the locking bolt 20 is in the unlocking state, the locking bolt 20 can exit the lock slot 12 from one side of the lock slot 12 to open the opening 13 of the lock shaft 91 entering and exiting the lock slot 12; the latch bolt 20 comprises a fixed end 24 and a rotating end 25, and the fixed end 24 of the latch bolt 20 is connected to the base body 11 through the first rotating shaft 14; the rotating end 25 extends towards the outside of the base body 11, the rotating end 25 can rotate around the fixed end 24, and the rotating end 25 is used for driving the locking bolt 20 to rotate around the fixed end 24 under the driving of external force; the rotary end 25 is always located on the same side as the fixed end 24 during switching of the locking bolt 20 between the locked state and the unlocked state. Fixed end 24 of bolt 20 is rotatably disposed on base body 11 through first rotating shaft 14, and bolt 20 is rotated around fixed end 24 by driving the rotating shaft with an external force, so that bolt 20 can easily and reliably enter and exit from lock slot 12. Locking end 26 and rotatory end 25 are located same one side of stiff end 24 all the time, and when locking state or unblock state, spring bolt 20 also can take place to rotate under the effect of self gravity to convert into the locking state, can prevent that spring bolt 20 from switching into the unblock state by accident, improve the reliability of lock base 10. As shown in fig. 1, the direction of the locked state is clockwise, the same side in this embodiment means that the locking end 26 and the rotating end 25 are always located on the side of the fixed end 24 close to the lock shaft 91 in the lock slot 12, and if the locking end 26 or the rotating end 25 rotates to the side of the fixed end 24 far from the position of the lock shaft 91 in the lock slot 12, under the action of the self-gravity or the spring tension of the lock tongue 20, the lock tongue 20 will rotate in the direction opposite to the direction of the locked state, that is, in the counterclockwise direction.

In addition, this embodiment is through rotationally locating base body 11 with spring bolt 20, and spring bolt 20 can stretch into or withdraw from keyway 12, under the prerequisite of guaranteeing can lock axle 91 reliably, only need withdraw from keyway 12 with spring bolt 20, can avoid spring bolt 20 to interfere the removal of lock axle 91, can improve the smoothness nature and the convenience of lock axle 91 business turn over keyway 12, also can improve the stability and the reliability of lock axle 91 of locking state.

As shown in fig. 4 and 5, the locking bolt 20 further includes a rotation end 25, the rotation end 25 extends toward the outside of the base body 11, and the rotation end 25 is used for driving the locking bolt 20 by an external force to rotate the locking bolt 20. Through setting up rotation end 25, can be convenient for external force drive spring bolt 20 and rotate, can improve the smoothness nature and the reliability that spring bolt 20 switched between locking state and unblock state. As an embodiment, the external force may directly act on the rotating end 25, or the external force may act on the rotating end 25 through other transmission components. For example, the external force may be generated by a cylinder assembly, and a piston of the cylinder assembly may push the rotating end 25 to rotate around the first rotating shaft 14. Of course, the external force may be generated by other linear movers. As shown in fig. 1, an external force may also be applied to the rotating end 25 through the lock link 17. In fig. 1, an external force may push the lock link 17 upwards, and during the process that the lock link 17 moves upwards, the lock link 17 drives the rotating end 25 of the locking bolt 20 to move upwards through the second rotating shaft 15, and since the fixed end 24 of the locking bolt 20 is connected to the base body 11 through the first rotating shaft 14, the locking bolt 20 will rotate around the first rotating shaft 14. Under the action of the restraining force of the first rotating shaft 14 and the external force, the lock link 17 will deflect to the upper left, the lock tongue 20 will gradually exit the lock groove 12 at the same time, and the lock tongue 20 is switched to the unlocking state. When the lock tongue 20 is switched from the unlocking state to the locking state, the lock link 17 moves in the direction toward the lower right, the lock tongue 20 gradually enters the lock groove 12, the lock shaft 91 is locked, and the lock tongue 20 is switched to the locking state.

As shown in fig. 4 and 5, when the lock tongue 20 is in the locked state, the axial center of the first rotating shaft 14 is higher than the axial center of the lock shaft 91 located in the lock groove 12. When the lock tongue 20 is in a locked state, the axis of the first rotating shaft 14 is higher than the axis of the lock shaft 91 located in the lock groove 12, so that the lock tongue 20 can rotate downwards around the fixed end 24 under the action of the lock shaft 91, that is, the lock tongue 20 further extends into the lock groove 12, and therefore the lock tongue 20 can be prevented from rotating upwards accidentally and the lock shaft 91 is prevented from being unlocked accidentally. In other words, the electric vehicle may shake during driving, so that the lock shaft 91 moves relative to the lock base 10, and the lock shaft 91 applies an acting force to the lock tongue 20, and the acting force may cause a downward rotation tendency of the lock tongue 20, that is, a rotation tendency of the lock tongue 20 in a direction in which the lock tongue 20 is switched to the locked state, because the axis of the first rotating shaft 14 of the lock tongue 20 is higher than the axis of the lock shaft 91, so as to improve the stability of locking the lock shaft 91 in the lock groove 12, prevent the lock tongue 20 from rotating upward, and prevent the lock tongue 20 from being accidentally switched to the unlocked state. Even if the electric automobile is in a bumpy state, the lock tongue 20 is not easy to automatically unlock, and the reliability of fixing the battery pack can be improved. In fig. 4, it can be seen that the axial center of the first rotating shaft 14 is higher than the height of the lock shaft 91 in the locked state.

As shown in fig. 4 and 5, locking bolt 20 further includes a locking end 26; when the tongue 20 is in the locked state, the lock end 26 abuts against the lock shaft 91, and the position where the lock end 26 abuts against the lock shaft 91 is located below the axial center of the lock shaft 91. The locking end 26 abuts against the outer wall of the lock shaft 91 below the axial center of the lock shaft 91, and can prevent the lock shaft 91 from coming out of the lock groove 12 below the latch tongue 20. The lock shaft 91 can apply a force to the lock tongue 20 at least partially through the locking end 26, the force can drive the lock tongue 20 to move downwards, the lock tongue 20 cannot rotate upwards, the lock tongue 20 cannot be unlocked accidentally, and the reliability of the lock base 10 can be improved.

In a preferred embodiment, the contact between the locking end 26 and the outer peripheral surface of the lock shaft 91 is a surface contact. By adopting the surface contact, the locking end 26 is engaged with the outer peripheral surface of the lock shaft 91 and partially covers the lock shaft 91, so that the locking end 26 is firmly attached to the lock shaft 91, and the stability and reliability of the lock base 10 can be improved.

In the figure, the locking end 26 is provided with a round chamfer 27 extending and protruding towards the axis of the lock shaft 91, and the round chamfer 27 is used for contacting the outer wall of the lock shaft 91 below the axis of the lock shaft 91 when the lock tongue 20 is in the locking state. The rounded corner 27 contacts the outer wall of the lock shaft 91 below the axis of the lock shaft 91, and prevents the lock shaft 91 from coming out of the lock groove 12 below the latch tongue 20. Lock shaft 91 can apply a force to locking bolt 20 at least partially through rounded corner 27, and the force can drive locking bolt 20 to move downwards without rotating locking bolt 20 upwards, resulting in accidental unlocking of locking bolt 20, and the reliability of lock base 10 can be improved. Locking end 26 is provided with a rounded corner 27 to facilitate the switching of locking bolt 20 to the unlocked position by pressing on lock shaft 91 with the external unlocking means.

In fig. 7 a-7 c, the locking end 26 and the rotating end 25 are both located on the same side of the fixed end 24 during switching of the locking bolt 20 between the locked state and the unlocked state. Locking end 26 and rotation end 25 are located the same side of stiff end 24 all the time, therefore even when the unblock state, spring bolt 20 also can take place to rotate under the effect of gravity to change into the locking state, can prevent that spring bolt 20 from opening by mistake, improve the reliability of lock base 10. As shown in fig. 7 a-7 c, the locking end 26 and the rotating end 25 are always located at the right side of the fixed end 24 during the switching of the locking bolt 20 between the locked state and the unlocked state.

In fig. 7 a-7 c, the locking end 26 is located between the fixed end 24 and the rotational end 25 when the locking bolt 20 is in the locked state. When the locking tongue 20 is in the unlocked state, the rotating end 25 is located between the fixed end 24 and the locking end 26. When the locking bolt 20 is in the locked state, the locking end 26 is located between the fixed end 24 and the rotating end 25, and at this time, the distance between the rotating end 25 and the fixed end 24 is large, that is, the force arm of the rotating end 25 relative to the fixed end 24 is large, so that a large moment can be generated by applying an acting force to the locking bolt 20 through the rotating end 25, and the moment can generate a large acting force to the locking end 26. Therefore, if the moment forces the latch bolt 20 to maintain the latched state, the latching end 26 of the latch bolt 20 of the lock base 10 may resist a large unexpected force, in other words, a force generated to the latching end 26 of the latch bolt 20 by unexpected vibration of the lock shaft 91 may hardly change the latched state of the latch bolt 20. Therefore, the latch bolt 20 can be urged to maintain the locked state, and the reliability and stability of the lock base 10 can be improved. If this moment forces latch bolt 20 to switch to the unblock state, then only need apply less effort to rotation end 25, exert the effort through rotation end 25 and can produce great moment to latch bolt 20, this moment can produce great effort to locking end 26, from this, the locking end 26 of latch bolt 20 of lock base 10 will remove under the driving of this effort to switch to the unblock state, can improve the flexibility of lock base 10 and the precision of controlling.

When the lock tongue 20 is in the unlocking state, the rotating end 25 is located between the fixed end 24 and the locking end 26, that is, the lock tongue 20 rotates relative to the fixed end 24 by a large angle, so that the rotating end 25 can be located between the fixed end 24 and the locking end 26, the lock tongue 20 can exit from the lock groove 12 more thoroughly, interference of the lock tongue 20 on movement of the lock shaft 91 is avoided, and reliability of the lock base 10 can be improved.

As shown in fig. 7a to 7C, the rotating end 25 is provided with a through hole 251, the through hole 251 is used for the second rotating shaft 15 to pass through, the lock tongue 20 is connected to the lock link 17 of the electric vehicle through the second rotating shaft 15, the lock link 17 is used for driving the lock tongue 20 to switch between the locking state and the unlocking state, and when the lock tongue 20 switches between the locking state and the unlocking state, an included angle C between a connecting line a between the axis of the first rotating shaft 14 and the axis of the second rotating shaft 15 and a horizontal plane B ranges from 30 ° to 89 °. The included angle C between the connecting line A between the axis of the first rotating shaft 14 and the axis of the second rotating shaft 15 and the horizontal plane C is set to be 30-89 degrees, so that the self-locking capacity of the bolt 20 can be further improved in the range on the premise that the bolt 20 can be stable and reliable, and the bolt 20 is further prevented from being accidentally switched to the unlocking state in the locking state. In addition, by providing the lock link 17, it is possible to control the plurality of lock tongues 20 synchronously, to switch between the lock devices and the unlock states of the plurality of lock tongues 20 simultaneously, and to improve the synchronism and reliability of the control of the lock base 10 effectively. As shown in fig. 6a to 6c, the lock link 17 of the present embodiment is simultaneously connected to 3 lock tongues 20, so that 3 lock bases 10 can be simultaneously controlled to be synchronously switched between the unlocked state and the locked state.

The included angle C between the connecting line A between the axis of the first rotating shaft 14 and the axis of the second rotating shaft 15 and the horizontal plane B is set to be 30-89 degrees, so that the self-locking capacity of the bolt 20 can be further improved in the range on the premise that the bolt 20 can be stable and reliable, and the bolt 20 is further prevented from being accidentally switched to the unlocking state in the locking state. The angle C preferably ranges from 35 to 85.

In other embodiments, the lower limit of the included angle C may be specifically one of 30 ° and 40 °, the upper limit of the included angle C may be specifically one of 70 °, 75 ° and 80 °, and the range of the included angle C may be selected from the lower limit and the upper limit, and of course, the specific value of the included angle C is not limited to the above values. The angle C is set to 30-89 deg. to facilitate the latch bolt 20 to switch from the unlocked state to the locked state under the action of its own weight and the tension of the spring 19 on the lock link 17. When contained angle C is greater than 89, the spring bolt 20 easily rotates along the opposite direction of locking direction under the spring 19 pulling force effect on lock connecting rod 17 and the effect of spring bolt self gravity, makes spring bolt 20 can not lock axle 91, leads to the locking inefficacy, when contained angle C is less than 30, leads to the stroke increase of lock axle 91 along lock connecting rod 17 direction, and size requirement to lock base 10 is high.

In this embodiment, fig. 7a shows the position of the bolt 20 in the locked state, where the angle C is 35 °. Fig. 7C shows the position of locking bolt 20 in the unlocked state, when angle C is 85 °. Fig. 7b shows the position of the bolt 20 between the unlocked and locked state, when the angle C may have a value between 35 and 85.

As shown in fig. 4 and 5, the locking tongue 20 has a first recess 21, when the locking tongue 20 is in the locked state, the first recess 21 extends into the lock groove 12, and the first recess 21 is configured to abut against the lock shaft 91. Through setting up spring bolt 20 as having first depressed part 21 to utilize first depressed part 21 butt lock axle 91 when the locking state, thereby can exert effort to lock axle 91, make lock axle 91 by spacing along lock connecting rod 17 length direction, avoid it to rock, and then make lock axle 91 can be locked reliably by stable.

As shown in fig. 4 and 5, the locking bolt 20 may also have a second recess 22 separately or simultaneously, the second recess 22 faces the opening 13 of the lock groove 12 when the locking bolt 20 is in the locked state, the locking bolt 20 exits the lock groove 12 when the locking bolt 20 is in the unlocked state, and the second recess 22 faces the lock groove 12 and avoids the lock shaft 91; through setting up spring bolt 20 to have second depressed part 22 to set up second depressed part 22 as towards keyway 12 and dodge lock axle 91 when spring bolt 20 is in the unblock state, thereby can further avoid spring bolt 20 to interfere the removal of lock axle 91, can improve the smoothness nature and the convenience that lock axle 91 passed in and out keyway 12, also can improve the stability and the reliability of lock axle 91 of locking state.

As shown in fig. 4 and 5, the locking tongue 20 may also have a protrusion 23 alone or in combination, and when the locking tongue 20 is in the locked state, the protrusion 23 extends into the lock groove 12 and abuts against the outer wall below the axis of the lock shaft 91. By providing the latch tongue 20 with the projection 23 and abutting the lock shaft 91 with the projection 23, the lock shaft 91 can be tightly fixed in the lock groove 12. Utilize bellying 23 to support the outer wall of lock axle 91 axle center below, make bellying 23 and the mutual butt of lock axle 91 of spring bolt 20 to lock axle 91 can block bellying 23 and remove to the top of lock axle 91 axle center, and also the lock axle 91 can prevent the bellying 23 of spring bolt 20 to remove, and then can avoid spring bolt 20 to switch to the unblock state from locking state accident, can improve lock base 10's reliability. In other words, the protruding portion 23 contacts the outer wall below the axis, so that the direction of the acting force applied by the lock shaft 91 to the lock tongue 20 is obliquely downward, so that the lock tongue 20 can move in the obliquely downward direction, rather than upward, and the lock tongue 20 can be prevented from exiting the lock groove 12, and the lock shaft 91 can be ensured to be firmly locked in the lock groove 12.

As shown in fig. 4, the outer side surface of the first recess 21 matches the outer wall of the lock shaft 91. Through setting up the lateral surface with first depressed part 21 into the outer wall phase-match with lock axle 91 to first depressed part 21 can be better with the outer wall of lock axle 91 laminate mutually, and then can block lock axle 91 more reliable and more stable, can improve stability and reliability after lock axle 91 is locked.

As an embodiment, the first recess 21 and the lock shaft 91 are in interference fit. In the locked state, by providing the interference fit between the first recessed portion 21 and the lock shaft 91, the tightness of the fit between the first recessed portion 21 and the lock shaft 91 can be further improved, the pressure of the first recessed portion 21 on the lock shaft 91 can also be improved, the lock shaft 91 can be more stably and reliably clamped, and the stability and reliability of the lock shaft 91 after being locked can be improved.

As shown in fig. 5 and 7c, when the locking bolt 20 is in the unlocked state, the outer side surface of the second recess 22 matches with the corresponding inner side surface of the locking groove 12. In the unlocking state, the second recess 22 is matched with the inner side surface of the corresponding lock groove 12, so that the lock groove 12 is not blocked by the second recess 22, the lock shaft 91 can slide in the lock groove 12 without obstruction, the lock shaft 91 can freely enter and exit the lock groove 12, and the lock tongue 20 is prevented from blocking the lock shaft 91 to move. In other words, the second recessed portion 22 of the locking tongue 20 does not extend into the lock groove 12, the locking tongue 20 does not protrude out of the lock groove 12, the locking tongue 20 completely exits from the lock groove 12, the lock shaft 91 can freely move in the lock groove 12, the lock shaft 91 can freely enter and exit from the lock groove 12, the locking tongue 20 is prevented from blocking the movement of the lock shaft 91, and the smoothness of the lock shaft 91 entering and exiting from the lock groove 12 is improved.

In this embodiment, in the unlocked state, the locking tongue 20 exits the locking groove 12 from the turning point of the locking groove 12, and accordingly, the outer side surface of the second recess 22 matches the inner side surface of the turning point of the locking groove 12. In one embodiment, the inner side surface of the turning point of the locking groove 12 may be an arc surface, and correspondingly, the second concave portion 22 may also be an arc surface, and the radius of the arc surface of the second concave portion 22 may be equal to the radius of the arc surface of the inner side surface of the turning point of the locking groove 12. In other embodiments, the outer side of the second recess 22 and the corresponding inner side of the locking groove 12 can have other shapes, such as a straight surface, a curved surface, an ellipsoid surface, etc.

In one embodiment, the protrusion 23 is disposed between the first recess 21 and the second recess 22. When locking bolt 20 is in the locked state, protruding portion 23 is disposed between first recessed portion 21 and second recessed portion 22, so that the structural form of locking bolt 20 can be simplified, and the reliability of locking bolt 20 is improved.

As shown in fig. 2 and 3, the base body 11 further has a latch groove 16, the latch groove 16 extends downward from the upper side of the base body 11, the latch groove 16 is further communicated with the latch groove 12, and the latch tongue 20 is rotatably disposed in the latch groove 16. By providing the latch groove 16 and communicating the latch groove 16 with the latch groove 12, the structural form of the lock base 10 can be simplified, and the structural strength of the lock base 10 can be improved. By locating locking bolt 20 in locking bolt slot 16, the stability and reliability of locking bolt 20 rotation process can be improved.

The lock groove 12 of the lock base 10 of the present embodiment is formed in an "L" shape rotated clockwise by 90 °, the lock groove 12 has an opening 13, the opening 13 has a guide portion 111, and the guide portion 111 forms a flare opening in a direction away from the lock groove 12. Under the guiding action of the bell mouth, the lock shaft 91 can more conveniently enter the lock groove 12, so that when the lock shaft 91 enters the lock groove 12, the positioning requirement on the lock shaft 91 can be reduced.

The bottom of the base body 11 is provided with a guiding inclined plane 112, and the guiding inclined plane 112 extends from the bottom surface of the base body 11 to the side surface of the base body 11 along an upward direction. The guide slope 112 can play a role of guiding during the movement of the battery pack toward the lock base 10 from bottom to top, so that the battery pack can be smoothly mounted on the electric vehicle.

The lock base 10 is further provided with an elastic member 18, and the elastic member 18 acts on the lock shaft 91, so that the lock shaft 91 in the locked state is pressed by the elastic member 18 and the locking tongue 20 and is fixed in the locked position in the lock groove 12. In this embodiment, the elastic element 18 may be disposed in the locking groove 12, one end of the elastic element 18 is connected to the base body 11, and the other end of the elastic element 18 abuts against the locking shaft 91. In other embodiments, the elastic member 18 may be disposed outside the accommodating chamber. The elastic member 18 is preferably a silicone pad or a rubber pad, and may be a spring or the like.

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 the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. A lock base is arranged on an electric automobile and used for being matched with a lock shaft on a battery pack of the electric automobile so as to lock the battery pack at the bottom of the electric automobile, and the lock base is characterized by comprising a base body and a lock tongue;

2. The lock base of claim 1, wherein the first pivot axis is higher than the axis of the lock shaft in the lock slot when the deadbolt is in the locked state.

3. The lock base of claim 1, wherein the locking bolt further comprises a locking end;

when the lock tongue is in a locking state, the locking end is abutted against the lock shaft, and the position where the locking end is abutted against the lock shaft is positioned below the axis of the lock shaft.

4. The lock base of claim 3, wherein the contact between the locking end and the outer peripheral surface of the lock shaft is surface contact.

5. The lock base of claim 3, wherein the locking end is provided with a rounded corner extending to protrude toward the axial center of the lock shaft, the rounded corner being adapted to contact an outer wall of the lock shaft below the axial center of the lock shaft when the latch bolt is in the locked state.

6. The lock base of claim 3, wherein the locking end and the rotating end are both on the same side of the fixed end during switching of the locking bolt between the locked state and the unlocked state.

7. The lock base of claim 6, wherein the locking end is located between the fixed end and the rotating end when the locking bolt is in the locked state;

8. The lock base of claim 1, wherein the rotation end is provided with a through hole, the through hole is used for a second rotating shaft to pass through, the bolt is connected to a lock connecting rod of the electric vehicle through the second rotating shaft, the lock connecting rod is used for driving the bolt to switch between a locking state and an unlocking state, and when the bolt is switched between the locking state and the unlocking state, an included angle between a connecting line between the axis of the first rotating shaft and the axis of the second rotating shaft and a horizontal plane ranges from 30 degrees to 89 degrees.

9. The lock base of claim 1, wherein the latch bolt has a first recess that extends into the lock slot when the latch bolt is in the latched state, the first recess being configured to abut against the lock shaft;

10. The lock base of claim 9, wherein an outer side of said first recess mates with an outer wall of said lock shaft;

or the first concave part is in interference fit with the lock shaft.

11. The lock base of claim 9, wherein an outer side of the second recess mates with a corresponding inner side of the lock groove when the deadbolt is in the unlocked state.

12. The lock base of claim 9 wherein the boss is disposed between the first recess and the second recess.

13. The lock base of claim 1, wherein the base body further defines a latch slot extending downwardly from an upper side of the base body, the latch slot further communicating with the latch slot, and the latch is rotatably disposed in the latch slot.

14. A locking mechanism for locking a battery pack to an electric vehicle, the locking mechanism comprising a lock link and a plurality of lock bases according to any one of claims 1 to 13, the rotating end being rotatably connected to the lock link by a second rotating shaft.

15. The lock mechanism of claim 14, wherein the lock link has a plurality of link grooves, and the rotation end is inserted into the link grooves.