CN114506199A

CN114506199A - Lock axle subassembly, locking subassembly, battery package subassembly and electric automobile

Info

Publication number: CN114506199A
Application number: CN202011167590.9A
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: 2020-10-27
Filing date: 2020-10-27
Publication date: 2022-05-17

Abstract

The invention discloses a lock shaft assembly, a locking assembly, a battery pack assembly and an electric automobile. The lock shaft assembly comprises a mounting seat and a lock shaft, the mounting seat is connected to one end of the lock shaft, the lock shaft is mounted on the battery pack through the mounting seat, and the distance from each point on the outer edge of the mounting seat to the center of the mounting seat is not equal completely along the circumferential direction of the mounting seat. The locking assembly comprises a locking mechanism and a locking shaft assembly, and the locking mechanism is used for locking and fixing the locking shaft. The battery pack assembly includes a battery pack and a lock shaft assembly. An electric vehicle includes a battery including an assembly and a locking mechanism. The cross section of mount pad is non-circular, can be comparatively conveniently through the cross sectional dimension of increase mount pad to can realize that the mount pad is connected with the battery package through connecting pieces such as thicker bolt or screw connection, thereby can improve the moment of torsion that the lock axle subassembly can be installed after on the battery package, and then can improve the installation reliability between lock axle subassembly and the battery package.

Description

Lock axle subassembly, locking subassembly, battery package subassembly and electric automobile

Technical Field

The invention relates to the field of electric automobiles, in particular to a lock shaft assembly, a locking assembly, a battery pack assembly and an electric automobile.

Background

The conventional battery pack mounting methods for electric vehicles are generally classified into a fixed type and a replaceable type, wherein the fixed type battery pack is generally fixed on the vehicle, and the vehicle is directly used as a charging object during charging. The replaceable battery pack is generally movably mounted, and the battery pack can be taken down at any time and replaced by a new battery pack.

The existing battery pack replacing locking mechanism comprises a locking shaft assembly arranged on a battery pack and a locking base assembly arranged on a vehicle body, the battery pack is locked and fixed by matching the locking shaft assembly with the locking base, the locking shaft assembly comprises a locking shaft and a mounting base, the locking shaft is arranged on the battery pack through the mounting base to form a battery pack assembly, the locking shaft in the prior art is disclosed as a scheme in Chinese patent application documents with the publication number of CN106427514A, the application number of CN201611041220.4 or publication number of CN206186769U, the application number of CN201621261424.4 or publication number of CN206186768U and the application number of CN201621261421.0, the locking shaft in the scheme comprises a shaft seat and a shaft rod, the shaft rod is arranged on the surface of the shaft seat, the existing shaft seat (namely the mounting base) is circular, and in order to meet the battery pack torque with higher requirements, the size of the mounting base can be increased so that the mounting base and the battery pack can be connected through thicker bolts or screws, but the cross section of the existing mounting base is circular, the space that the mount pad occupy is great, takes place to interfere with other parts easily. Therefore, the structure of the mounting seat in the prior art is inconvenient for increasing the torque, that is, the torque is low after the lock shaft assembly in the prior art is mounted on the battery pack, so that the mounting reliability between the lock shaft assembly and the battery pack is low.

Disclosure of Invention

The invention aims to overcome the defects that after a lock shaft assembly is installed on a battery pack, the torque of the battery pack assembly is lower, and the installation reliability between the lock shaft assembly and the battery pack is lower in the prior art, and provides the lock shaft assembly, a locking assembly, the battery pack assembly and an electric automobile.

The invention solves the technical problems through the following technical scheme:

the utility model provides a lock axle subassembly for install on the lateral wall of battery package, lock axle subassembly includes mount pad and lock axle, the mount pad connect in the one end of lock axle, the lock axle passes through the mount pad install in on the battery package, follow the circumferential direction of mount pad, each point on the outward flange of mount pad extremely the distance at the center of mount pad is not equal completely.

In this scheme, the cross section of mount pad is non-circular, when needs pass through the mount pad with the lock axle and install the battery package on, compare in prior art, can comparatively conveniently be through the cross sectional dimension of increase mount pad to can realize that the mount pad is connected with the battery package through connecting pieces such as thicker bolt or screw connection, thereby can improve the moment of torsion that the lock axle subassembly can be installed on the battery package after, and then can improve the installation reliability between lock axle subassembly and the battery package.

Preferably, the mounting base is provided with at least two first mounting holes, the first mounting holes penetrate through the mounting base along the thickness direction of the mounting base, and the first mounting holes are arranged around the lock shaft.

In this scheme, the mount pad is connected with external component through first mounting hole, after the cross sectional dimension of increase mount pad, is favorable to optimizing the setting of first mounting hole, if increase the pitch-row between the adjacent first mounting hole, increase the aperture of first mounting hole etc. and then be favorable to improving the reliability that mount pad and external component are connected, and then be favorable to improving the moment of torsion that lock axle subassembly installed on the battery package, and then can improve the installation reliability between lock axle subassembly and the battery package. In addition, the first mounting hole is arranged around the lock shaft, stress on the mounting seat is uniform, the connection reliability of the mounting seat and an external element is improved, and stress concentration of the mounting seat is reduced or avoided.

Preferably, the distance between the axial leads of two adjacent first mounting holes is larger than the diameter of the lock shaft.

In the scheme, the structural arrangement is adopted, so that on one hand, the section of the mounting seat is favorably and reasonably utilized, the distribution of the first mounting holes and the lock shafts in the mounting seat is favorably optimized, and the reliability of connection between the mounting seat and an external element is favorably improved; on the other hand, the clearance between lock axle and the first mounting hole is convenient for install the lock axle on the mount pad, and the setting of first mounting hole can not influence being connected of lock axle and mount pad promptly.

Preferably, the mounting seat has at least one arc-shaped portion in a circumferential direction.

In the scheme, the arc-shaped part is arranged, so that on one hand, on the basis of ensuring the torque, the occupied space of the mounting seat and the weight of the mounting seat can be reduced, the light weight of the lock shaft assembly is favorably realized, and the interference possibly generated by the lock shaft assembly and other structures after the lock shaft assembly is mounted on the battery pack is favorably reduced or avoided; on the other hand, the arc portion can reduce or avoid stress concentration on the mount.

Preferably, the mounting base is of a four-corner structure, the four corners of the mounting base are all of an arc-shaped structure or a fillet structure, and each arc-shaped structure or fillet structure is used for forming the arc-shaped portion.

In this embodiment, the arc-shaped portion can be obtained in two ways, specifically as follows: the first method is to cut four sides of a round mounting seat to form the mounting seat with four arc-shaped corners; the second is to round the base structure (such as a cube or a cuboid) of the mounting base.

Preferably, the axle center of lock axle is located on the central line of mount pad, in the mount pad with the side that the lock axle is connected is the connection face on the connection face, the distance between the circular arc center of arc portion and the side of being connected the face is first distance, the axle center of lock axle with distance between the side is the second distance, first distance is not more than the second distance.

In this aspect, for any arc portion located on one side (for example, the left side) of the axis of the lock shaft, the arc center of the arc portion can be located only on the side (left side) of the axis of the lock shaft or can coincide with the axis of the lock shaft. So set up, the circular arc radius of arc portion neither can be too big, also can not the undersize. The arc radius is not too small, so that the tip at the arc part is prevented from occurring, and the mounting seat is prevented from being damaged due to stress concentration; the arc radius can not be too big, after the external element was installed to the mount pad, is favorable to guaranteeing the area of contact of mount pad and external element, and then is favorable to guaranteeing the connection reliability of mount pad and external element.

Preferably, the mounting seat is provided with at least two first mounting holes, the first mounting holes penetrate through the mounting seat along the thickness direction of the mounting seat, and the at least two first mounting holes are arranged around the lock shaft;

for any one first mounting hole, the distance between the axis of the lock shaft and the center of the first mounting hole is not less than the sum of the radius of the lock shaft and the radius of the first mounting hole.

In the scheme, at least two first mounting holes are arranged in terms of the number of the first mounting holes, so that the mounting reliability of the mounting seat is improved; from first mounting hole position relation, two at least first mounting holes are around the lock axle, are favorable to improving the homogeneity of mount pad atress to also be favorable to guaranteeing the position of lock axle for the mount pad.

Preferably, the arc center of the arc portion coincides with the center of the corresponding first mounting hole.

Preferably, a shaft sleeve is sleeved on one end, far away from the mounting seat, of the lock shaft.

In this scheme, the axle sleeve can play the guard action to the lock axle, is favorable to improving the reliability of lock axle subassembly.

Preferably, the shaft sleeve is made of a wear-resistant material, and the material of the shaft sleeve is stainless steel, 45 steel or an elastic material.

Preferably, the lock shaft further comprises a protective layer, the protective layer is wrapped outside the shaft sleeve, and the protective layer is made of polyurethane or nylon.

In this scheme, the protective layer can play the guard action to the axle sleeve, and then is favorable to further protecting the lock axle, consequently, is favorable to further improving the reliability of lock axle subassembly.

Preferably, the lock shaft further comprises a shaft stop, and the shaft stop is arranged at the end part, far away from the mounting seat, of the lock shaft, so as to limit the movement of the shaft sleeve along the axial direction of the lock shaft.

In this scheme, the axle bumper plays limiting displacement to the axle sleeve to be favorable to the axle sleeve to exert a role reliably, and then be favorable to further improving the reliability of lock axle subassembly.

The invention also provides a locking assembly which is characterized by comprising a locking mechanism and the lock shaft assembly, wherein the locking mechanism is used for locking and fixing the lock shaft.

In this scheme, the cross section of mount pad is non-circular, when needs will lock the axle and pass through the mount pad and install the battery package on, compare in prior art, can be comparatively conveniently through the cross sectional dimension of increase mount pad, thereby can realize that the mount pad is connected with the battery package through connecting pieces such as thicker bolt or screw connection, thereby can improve the moment of torsion that the lock axle subassembly can after installing on the battery package, and then can improve the installation reliability between lock axle subassembly and the battery package, consequently, be favorable to improving the reliability that locking mechanism carries out the locking to the lock axle.

Preferably, the locking mechanism includes lock base and spring bolt, the spring bolt around the rotation axis rotationally install in lock base, lock base has the confession the chamber that holds that the lock axle got into, the spring bolt rotates so that to be located hold the intracavity the lock axle is in locking state or unblock state, works as the lock axle is in when locking state, the axle center of the rotation axis of spring bolt is higher than the axle center of lock axle.

In this scheme, the lock axle can be placed in holding the chamber, and when the lock axle was in the locking state, the lock axle was locked in holding the chamber by the spring bolt to it is fixed with the lock base to make the battery package. The spring bolt upwards rotates, then the locking shaft changes into the unlocking state and can follow and hold the chamber and take out to effectively reduce the flow complexity and the loaded down with trivial details degree of step of dismouting battery package. In addition, under the locking state, even electric automobile takes place acutely to rock at the in-process of traveling and leads to the lock axle to move relative to the lock base to lead to the lock axle to exert the effort to the spring bolt, because the axle center of the rotation axis of spring bolt is higher than the axle center of lock axle, this effort can lead to the spring bolt to have the trend of downrotation, to the trend of locking direction rotation promptly, and then improves the stability of lock axle locking in the lock base, prevents to make the lock axle convert into the unblock state because of the spring bolt upwards rotates. Therefore, even in a bumpy state, the locking mechanism is not easy to automatically unlock, and the reliability of fixing the battery pack is improved.

The invention also provides a battery pack assembly which is characterized by comprising a battery pack and the lock shaft assembly, wherein the lock shaft is arranged on the side wall of the battery pack through the mounting seat.

In this scheme, the cross section of mount pad is non-circular, when passing through the mount pad with the lock axle and installing the battery package on, compare in prior art, can comparatively conveniently be through the cross sectional dimension of increase mount pad to can realize that the mount pad is connected with the battery package through connecting pieces such as thicker bolt or screw connection, thereby can improve the moment of torsion that the lock axle subassembly can after installing on the battery package, and then can improve the installation reliability between lock axle subassembly and the battery package.

Preferably, the battery pack assembly further comprises a connecting plate, the connecting plate is provided with a containing hole and a second mounting hole, the connecting plate is provided with a first side and a second side which are arranged oppositely, the lock shaft penetrates through the containing hole from the first side and extends out of the second side, and the mounting seat is attached to the first side and connected to the connecting plate;

the connecting plate is connected to the side wall of the battery pack through the second mounting hole.

Preferably, the mounting seat is in threaded connection with the connecting plate.

Preferably, the bottom of the connecting plate has an extending portion extending from the first side toward the battery pack.

In this scheme, the extension can enough support at least partly of the lateral wall of battery package, can further be connected with the battery package through connection structure again, is favorable to further improving the reliability that lock axle subassembly and battery package are connected.

Preferably, a plurality of third mounting holes are arranged at intervals on the extension part and used for being connected with a battery pack.

In the scheme, on one hand, the extension part can be connected with the battery pack through the third mounting hole, so that the reliability of connection between the lock shaft assembly and the battery pack is further improved; on the other hand, when being connected to the battery package with the lock axle subassembly, the third mounting hole can also play the effect of primary importance, also is favorable to improving the installation effectiveness, simultaneously, also is favorable to guaranteeing that the lock axle subassembly is connected to the battery package comparatively reliably.

The invention further provides an electric automobile which comprises a locking mechanism and the battery pack assembly, wherein the locking mechanism is used for locking and fixing the lock shaft.

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

The positive progress effects of the invention are as follows:

in this lock axle subassembly, the cross section of mount pad is non-circular, when needs pass through the mount pad with the lock axle and install the battery package on, compare in prior art, can be comparatively conveniently through the cross sectional dimension who increases the mount pad to can realize that the mount pad is connected with the battery package through connecting pieces such as thicker bolt or screw connection, thereby can improve the moment of torsion that the lock axle subassembly can be installed back on the battery package, and then can improve the installation reliability between lock axle subassembly and the battery package. Accordingly, in the lock assembly, the reliability of locking of the lock shaft by the lock mechanism can be improved. Accordingly, in the battery pack assembly, the lock shaft assembly can be more reliably mounted to the battery pack, and the reliability of the battery pack assembly is higher. Therefore, the electric vehicle is also highly reliable.

Drawings

Fig. 1 is a schematic structural view of a lock shaft assembly in embodiment 1 of the present invention.

Fig. 2 is a schematic connection diagram of a lock shaft of a lock mechanism in a lock assembly in embodiment 2 of the present invention, wherein the lock shaft is in a locked state.

Fig. 3 is a schematic connection diagram of a lock shaft of a lock mechanism in a lock assembly according to embodiment 2 of the present invention, where the lock shaft is in an unlocked state.

Fig. 4a to 4c are schematic diagrams illustrating a force analysis of the locking mechanism in the locking assembly in embodiment 2 of the present invention.

Fig. 5 is a schematic view of a part of a battery pack assembly according to embodiment 3 of the present invention.

Fig. 6 is another schematic structural diagram of a portion of a battery pack assembly in embodiment 3 of the present invention.

Fig. 7 is an exploded schematic view of a battery pack assembly according to embodiment 3 of the present invention.

Fig. 8 is a schematic view of another part of the structure of the battery pack assembly in embodiment 3 of the present invention.

Fig. 9 is a schematic structural view of another part of a battery pack assembly in embodiment 3 of the present invention.

Description of reference numerals:

10 lock shaft assembly

101 mounting base

102 lock shaft

103 first mounting hole

104 arc part

105 connecting surface

106 shaft sleeve

107 axle bumper

20 locking mechanism

201 lock base

202 lock tongue

203 accommodating cavity

204 axis of rotation

30 battery pack

40 connecting plate

401 containing hole

402 second mounting hole

403 extension part

404 third mounting hole

First force F1

Second force F2

Third force F3

Height difference d

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

Example 1

The present embodiment discloses a lock shaft assembly 10, wherein the lock shaft assembly 10 is used for being mounted on the side wall of a battery pack. As shown in fig. 1, the lock shaft assembly 10 includes a mounting seat 101 and a lock shaft 102, the mounting seat 101 is connected to one end of the lock shaft 102, the lock shaft 102 is mounted on the battery pack through the mounting seat 101, and distances from points on an outer edge of the mounting seat 101 to a center of the mounting seat 101 are not exactly equal along a circumferential direction of the mounting seat 101.

In this embodiment, the cross section of the mounting seat 101 is non-circular, and when the lock shaft 102 needs to be mounted on the battery pack through the mounting seat 101, compared with the prior art, the cross section of the mounting seat 101 can be conveniently increased, so that the mounting seat 101 can be connected with the battery pack through connecting pieces such as thicker bolts or screw connections, the torque of the lock shaft assembly 10 mounted on the battery pack can be improved, and the mounting reliability between the lock shaft assembly 10 and the battery pack can be improved.

In an alternative embodiment, the mounting seat 101 defines at least two first mounting holes 103, the first mounting holes 103 penetrate through the mounting seat 101 along a thickness direction of the mounting seat 101, and the first mounting holes 103 are disposed around the lock shaft 102.

Wherein, mount pad 101 is connected with external component through first mounting hole 103, after the cross sectional dimension of increase mount pad 101, be favorable to optimizing the setting of first mounting hole 103, if increase the pitch-row between the adjacent first mounting hole 103, increase the aperture of first mounting hole 103 etc., and then be favorable to improving the reliability that mount pad 101 and external component are connected, and then be favorable to improving the moment of torsion that the lock axle subassembly 10 can after installing on the battery package, and then can improve the installation reliability between lock axle subassembly 10 and the battery package. In addition, the first mounting hole 103 is disposed around the lock shaft 102, so that the stress on the mounting seat 101 is relatively uniform, which is beneficial to improving the reliability of connection between the mounting seat 101 and an external element, and is beneficial to reducing or avoiding stress concentration of the mounting seat 101.

In the present embodiment, as shown in fig. 1, the number of first mounting holes 103 is 4. In other alternative embodiments, the number of the first mounting holes 103 may be set according to actual needs and spatial layout on the mounting seat 101, such as 2, 3, 5 and more.

In an alternative embodiment, the distance between the axial lines of two adjacent first mounting holes 103 is larger than the diameter of the lock shaft 102.

Due to the arrangement, on one hand, the section of the mounting seat 101 is favorably and reasonably utilized, the distribution of the first mounting hole 103 and the lock shaft 102 in the mounting seat 101 is favorably optimized, and the connection reliability of the mounting seat 101 and an external element is favorably improved; on the other hand, the gap between the lock shaft 102 and the first mounting hole 103 facilitates mounting the lock shaft 102 on the mounting seat 101, i.e. the arrangement of the first mounting hole 103 does not affect the connection of the lock shaft 102 with the mounting seat 101.

In an alternative embodiment, the mounting seat 101 has at least one arc-shaped portion 104 in the circumferential direction.

On one hand, the arc-shaped portion 104 is arranged, so that on the basis of ensuring the torque, the occupied space of the mounting seat 101 and the weight of the mounting seat 101 can be reduced, the light weight of the lock shaft assembly 10 can be favorably realized, and the interference between the lock shaft assembly 10 and other structures after being mounted on a battery pack can be favorably reduced or avoided; on the other hand, the arc portion 104 can reduce or avoid stress concentration on the mount 101, thereby protecting the mount 101.

In an alternative embodiment, the mounting base 101 has a four-corner structure, and the four corners of the mounting base 101 are circular arc structures or rounded structures, and each circular arc structure or rounded structure is used to form the arc portion 104.

The arc portion 104 can be obtained in two ways, specifically as follows: the first method is to cut four sides of a circular mounting seat 101 to form the mounting seat 101 with four arc-shaped corners; the second is by rounding the base structure (e.g., a cube or cuboid) of the mounting base 101.

In light of the foregoing, the arcuate portion 104 in the latch shaft assembly 10 shown in FIG. 1 is obtained in accordance with a first manner. The first mode generates less waste in obtaining the arc portion 104 and is simpler to process than the second mode.

In another alternative embodiment, the axis of the lock shaft 102 is located on the center line of the mounting seat 101, the side of the mounting seat 101 connected to the lock shaft 102 is a connecting surface 105, on the connecting surface 105, the distance between the arc center of the arc-shaped portion 104 and the side of the connecting surface 105 is a first distance, the distance between the axis of the lock shaft 102 and the side is a second distance, and the first distance is not greater than the second distance.

In any arc-shaped portion 104 located on one side (for example, left side) of the axial center of the lock shaft 102, the arc center of the arc-shaped portion 104 can be located only on the side (left side) of the axial center of the lock shaft 102 or can be overlapped with the axial center of the lock shaft 102. So configured, the arc radius of the arc portion 104 is neither too large nor too small. The radius of the arc cannot be too small, so that a tip is prevented from appearing at the arc part 104, and the mounting seat 101 is prevented from being damaged due to stress concentration; the radius of the arc is not too large, and after the mounting seat 101 is mounted on an external element, the contact area between the mounting seat 101 and the external element is favorably ensured, and the connection reliability between the mounting seat 101 and the external element is favorably ensured.

In an alternative embodiment, the mounting seat 101 defines at least two first mounting holes 103, the first mounting holes 103 penetrate through the mounting seat 101 along a thickness direction of the mounting seat 101, and the at least two first mounting holes 103 are disposed around the lock shaft 102. For any first mounting hole 103, the distance between the axis of the lock shaft 102 and the center of the first mounting hole 103 is not less than the sum of the radius of the lock shaft 102 and the radius of the first mounting hole 103.

In terms of the number of the first mounting holes 103, at least two first mounting holes 103 are provided, which is beneficial to improving the mounting reliability of the mounting seat 101; from the position relationship of the first mounting holes 103, at least two first mounting holes 103 surround the lock shaft 102, which is beneficial to improving the uniformity of the force applied to the mounting seat 101, and is beneficial to ensuring the position of the lock shaft 102 relative to the mounting seat 101.

In addition, in an alternative embodiment, the arc center of the arc portion 104 coincides with the center of the corresponding first mounting hole 103. The arc radius of the arc-shaped part 104 is 3-6 mm. The arc angle of the arc portion 104 ranges from 75 to 105 °.

The arc radius of the arc portion 104 is set within the above range, which can ensure the mounting reliability of the mount 101 and reduce or prevent the occurrence of stress concentration on the mount 101. As above, with the arc radius, the arc radius is not too small, so as to prevent the tip from appearing at the arc portion 104 and prevent the stress concentration from damaging the mounting seat 101; the radius of the arc is not too large, and after the mounting seat 101 is mounted on an external element, the contact area between the mounting seat 101 and the external element is favorably ensured, and the connection reliability between the mounting seat 101 and the external element is favorably ensured. Similarly, the adoption of the arc angle is also beneficial to ensuring the installation reliability of the installation seat 101 and reducing or preventing the occurrence of stress concentration phenomenon on the installation seat 101.

In an alternative embodiment, as shown in fig. 1, a bushing 106 is sleeved on an end of the lock shaft 102 away from the mounting seat 101. The sleeve 106 can protect the lock shaft 102, which is beneficial to improving the reliability of the lock shaft assembly 10.

The sleeve 106 is made of a wear-resistant material, and the material of the sleeve 106 is stainless steel, 45 steel or an elastic material. As an example, the elastic material may be selected to be rubber.

In another alternative embodiment, the lock shaft 102 further includes a protective layer (not shown), the protective layer covers the exterior of the shaft sleeve 106, and the material of the protective layer is polyurethane or nylon. The protective layer can protect the shaft sleeve 106, and further protect the lock shaft 102, thereby further improving the reliability of the lock shaft assembly 10.

As shown in fig. 1, the lock shaft 102 further includes a shaft stopper 107, and the shaft stopper 107 is disposed at an end of the lock shaft 102 far from the mounting seat 101, for limiting the movement of the shaft sleeve 106 along the axial direction of the lock shaft 102. The shaft stopper 107 has a limiting function on the shaft sleeve 106, so that the shaft sleeve 106 can reliably function, and the reliability of the shaft locking assembly 10 can be further improved.

Example 2

The present embodiment discloses a locking assembly, as shown in fig. 2-3 and fig. 4a-4c, which includes a locking mechanism 20 and a lock shaft assembly 10 in embodiment 1, wherein the same reference numerals as in embodiment 1 denote the same elements, and the locking mechanism 20 is used for locking and fixing the lock shaft 102.

According to embodiment 1, the cross section of the mounting seat 101 is non-circular, when the lock shaft 102 needs to be mounted on the battery pack through the mounting seat 101, compared with the prior art, the cross section size of the mounting seat 101 can be conveniently increased, so that the mounting seat 101 can be connected with the battery pack through connecting pieces such as thicker bolts or screw connections, the torque of the lock shaft assembly 10 mounted on the battery pack can be improved, the mounting reliability between the lock shaft assembly 10 and the battery pack can be improved, and the reliability of locking the lock shaft 102 by the locking mechanism 20 can be improved.

As shown in fig. 2 to 3, the locking mechanism 20 includes a lock base 201 and a locking tongue 202, the locking tongue 202 is rotatably mounted on the lock base 201 around a rotation shaft 204, the lock base 201 has an accommodating cavity 203 for the lock shaft 102 to enter, the locking tongue 202 rotates to make the lock shaft 102 located in the accommodating cavity 203 in a locking state or an unlocking state, and when the lock shaft 102 is in the locking state, the axis of the rotation shaft 204 of the locking tongue 202 is higher than the axis of the lock shaft 102.

Wherein, the lock shaft 102 can be placed in the receiving cavity 203, when the lock shaft 102 is in the locked state, the lock shaft 102 is locked in the receiving cavity 203 by the lock tongue 202, so that the battery pack is fixed with the lock base 201. When the latch 202 rotates upwards, the latch shaft 102 is switched to the unlocked state and can be taken out from the accommodating cavity 203, so that the complexity of the process and the complexity of the steps for disassembling and assembling the battery pack are effectively reduced. In addition, in the locked state, even if the electric vehicle is shaken violently during driving to cause the lock shaft 102 to move relative to the lock base 201, so that the lock shaft 102 applies an acting force to the lock tongue 202, because the axis of the rotating shaft 204 of the lock tongue 202 is higher than the axis of the lock shaft 102, the acting force can cause the lock tongue 202 to have a downward rotating tendency, namely a tendency of rotating towards the locking direction, so that the stability of locking the lock shaft 102 in the lock base 201 is improved, and the lock shaft 102 is prevented from being converted into the unlocked state due to the upward rotation of the lock tongue 202. Therefore, even in a bumpy state, the locking mechanism 20 is not easily unlocked automatically, which is advantageous for improving the reliability of battery pack fixation.

The accommodating cavity 203 has one end serving as a locking position of the lock shaft 102 and the other end serving as a connecting position of the rotation shaft 204 of the latch bolt 202, and the latch bolt 202 includes a fixed end rotatably connected to the rotation shaft 204, a contact end extending toward the locking position of the lock shaft 102 and adapted to abut against the lock shaft 102, and a rotation end extending toward the outside of the lock base 201 and adapted to rotate around the rotation shaft 204 under an external action.

The fixed end of the latch 202 is rotatably connected to one end of the accommodating cavity 203, and the contact end of the latch 202 can press the lock shaft 102 against the other end of the accommodating cavity 203, so that the lock shaft 102 is limited to the locking position. An external force may be applied to the rotating end to rotate the latch bolt 202 about the rotational axis 204 to switch the latch shaft 102 between the latched state and the unlatched state.

In addition, as shown in fig. 4a, since the axis of the rotating shaft 204 in the present embodiment is higher than the axis of the lock shaft 102, and there is a height difference d between the two, when the lock shaft 102 is in the locked state, the lock shaft 102 applies a first force F1 to the lock tongue 202, and the rotating shaft 204 applies a second force to the lock tongue 202, where the first force and the second force are opposite in direction. The first acting force and the second acting force are applied to the lock tongue 202 together, so that the lock tongue 202 is maintained in a stable locked state, and therefore, even if vibration is generated by vehicle bump, the lock tongue 202 is not easy to rotate, so that the lock mechanism 20 is prevented from being unlocked undesirably automatically, and the reliability of the fixation of the lock shaft 102 is ensured.

At the same time, the first force F1 forms a first moment with respect to the rotation axis 204, the lock base 201 (not shown in fig. 4a-4 c) generates a third force F3 on the rotation end of the bolt 202, and the third force F3 forms a second moment with respect to the rotation axis 204, the first moment and the second moment being opposite in direction.

The first torque causes the lock tongue 202 to have a tendency to rotate downward, and therefore even if the lock shaft 102 moves toward the outside of the accommodating chamber 203, the lock tongue 202 does not move upward so that the lock shaft 102 is switched from the locked state to the unlocked state. At the same time, the second torque prevents the locking bolt 202 from rotating downward too much, which would otherwise cause the lock shaft 102 to come out of the receiving cavity 203. Therefore, in the locked state, the more the lock shaft 102 moves toward the outside of the accommodation chamber 203, the less the lock shaft 102 is likely to leave the accommodation chamber 203.

In contrast, as shown in fig. 4b, if the axis of the rotating shaft 204 is aligned with the axis of the lock shaft 102, although the first acting force F1 and the second acting force F2 can be generated in opposite directions, the third acting force F3 must be 0 because the first acting force F1 does not generate the first moment, otherwise the second moment generated by the third acting force F3 will make the lock tongue 202 unbalanced, that is, the lock tongue 202 will not abut against the lock base 201, which will reduce the stability of the lock tongue 202 in the locked state.

In contrast, if the axis of the rotating shaft 204 is lower than the axis of the lock shaft 102, as shown in fig. 4c, the first force F1 and the third force F3 are in the same direction with respect to the moment generated by the rotating shaft 204, and therefore the lock tongue 202 cannot be locked smoothly.

As can be seen from the above force analysis, since the axis of the rotating shaft 204 in this embodiment is higher than the axis of the lock shaft 102, when the battery pack is in the locked state, the locking tongue 202 is kept stable under the combined action of a plurality of forces and a plurality of moments, and the possibility of automatic unlocking caused by automatic overturning of the locking tongue 202 is reduced, the locking mechanism 20 has a considerable resistance to external interference, and the battery pack can be reliably locked on the battery bracket of the electric vehicle.

Example 3

The present embodiment discloses a battery pack assembly, as shown in fig. 5 to 9, which includes a battery pack 30 and a lock shaft assembly 10 of embodiment 1, the same reference numerals as those of embodiment 1 denote the same elements in the present embodiment, and a lock shaft 102 is mounted to a side wall of the battery pack 30 through a mounting seat 101.

According to embodiment 1, the cross section of the mounting seat 101 is non-circular, and when the lock shaft 102 is mounted on the battery pack 30 through the mounting seat 101, compared with the prior art, the cross section size of the mounting seat 101 can be conveniently increased, so that the mounting seat 101 and the battery pack 30 can be connected through connecting pieces such as thicker bolts or screw connections, the torque of the lock shaft assembly 10 mounted on the battery pack 30 can be improved, and the mounting reliability between the lock shaft assembly 10 and the battery pack 30 can be improved.

As shown in fig. 5-9, the battery pack assembly further includes a connecting plate 40, the connecting plate 40 is provided with a receiving hole 401 and a second mounting hole 402, the connecting plate 40 has a first side and a second side opposite to each other, the lock shaft 102 passes through the receiving hole 401 from the first side and extends out of the second side, and the mounting seat 101 is attached to the first side and connected to the connecting plate 40. The connection plate 40 is connected to the side wall of the battery pack 30 through the second mounting hole 402. The mounting seat 101 is screwed to the connection plate 40.

As shown in fig. 5-7, the bottom of the connecting plate 40 has an extension 403, and the extension 403 extends from the first side toward the battery pack 30. The extension 403 can support at least a portion of the sidewall of the battery pack 30 and can be further connected to the battery pack 30 through a connection structure, which is beneficial to further improve the reliability of the connection between the lock shaft assembly 10 and the battery pack 30.

In addition, a plurality of third mounting holes 404 are formed at intervals on the extension 403 for connecting with the battery pack 30. On one hand, the extension part 403 can be connected with the battery pack 30 through the third mounting hole 404, which is beneficial to further improving the reliability of the connection between the lock shaft assembly 10 and the battery pack 30; on the other hand, when the lock shaft assembly 10 is connected to the battery pack 30, the third mounting hole 404 can also serve as an initial positioning, which is also beneficial to improving the mounting efficiency, and is also beneficial to ensuring that the lock shaft assembly 10 is reliably connected to the battery pack 30.

The embodiment also discloses an electric automobile which comprises a battery pack assembly and the locking mechanism 20 in the embodiment 2, wherein the locking mechanism 20 is used for locking and fixing the lock shaft 102.

In this application, the cross section of the mount pad of lock axle subassembly is non-circular, when needs pass through the mount pad with the lock axle and install the battery package on, compare in prior art, can be comparatively conveniently through the cross sectional dimension of increase mount pad to can realize that the mount pad is connected with the battery package through connecting pieces such as thicker bolt or screw connection, thereby can improve the moment of torsion that the lock axle subassembly can be installed after the battery package, and then can improve the installation reliability between lock axle subassembly and the battery package. Accordingly, in the lock assembly, the reliability of locking of the lock shaft by the lock mechanism can be improved. Accordingly, in the battery pack assembly, the lock shaft assembly can be more reliably mounted to the battery pack, and the reliability of the battery pack assembly is higher. Therefore, the electric vehicle is also highly reliable.

While specific embodiments of the invention have been described above, it will be appreciated 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 within the scope of the invention.

Claims

1. The utility model provides a lock axle subassembly for install on the lateral wall of battery package, its characterized in that, lock axle subassembly includes mount pad and lock axle, the mount pad connect in the one end of lock axle, the lock axle passes through the mount pad install in on the battery package, follow the circumferential direction of mount pad, each point on the outward flange of mount pad extremely the distance at the center of mount pad is not equal completely.

2. The lock shaft assembly as claimed in claim 1, wherein the mounting seat defines at least two first mounting holes, the first mounting holes penetrate through the mounting seat along a thickness direction of the mounting seat, and the first mounting holes are disposed around the lock shaft.

3. The lock shaft assembly as claimed in claim 2, wherein the distance between the axial centers of two adjacent first mounting holes is larger than the diameter of the lock shaft.

4. The lock shaft assembly as claimed in claim 1, wherein said mounting seat has at least one arcuate portion in a circumferential direction.

5. The lock shaft assembly as claimed in claim 4, wherein the mounting seat has a four-corner structure, and the four corners of the mounting seat are circular arc structures or rounded corner structures, and each circular arc structure or rounded corner structure is used for forming the arc portion.

6. The lock shaft assembly of claim 4, wherein the axis of the lock shaft is located on a centerline of the mounting seat, a side of the mounting seat that is connected to the lock shaft is a connecting surface, a distance between an arc center of the arc portion and a side of the connecting surface on the connecting surface is a first distance, a distance between the axis of the lock shaft and the side is a second distance, and the first distance is not greater than the second distance.

7. The lock shaft assembly as claimed in claim 4, wherein the mounting seat defines at least two first mounting holes, the first mounting holes penetrate through the mounting seat along a thickness direction of the mounting seat, and the at least two first mounting holes are disposed around the lock shaft;

8. The lock shaft assembly as claimed in claim 7, wherein the arc center of said arc portion coincides with the center of the corresponding first mounting hole.

9. The lock shaft assembly as claimed in any one of claims 1 to 8, wherein a bushing is fitted over an end of the lock shaft remote from the mounting seat.

10. The lock shaft assembly as claimed in claim 9, wherein said bushing is made of a wear resistant material and said bushing is made of stainless steel, 45 steel or an elastomeric material.

11. The lock shaft assembly as claimed in claim 9, wherein the lock shaft further comprises a protective layer, the protective layer is coated on the exterior of the shaft sleeve, and the protective layer is made of polyurethane or nylon.

12. The lock shaft assembly of claim 11 wherein said lock shaft further comprises a stop disposed at an end of said lock shaft distal from said mounting base for limiting movement of said sleeve in the direction of the axis of said lock shaft.

13. A lock assembly comprising a lock shaft assembly as claimed in any one of claims 1 to 12 and a locking mechanism for locking the lock shaft.

14. The latch assembly of claim 13, wherein the latch mechanism includes a lock base and a latch bolt, the latch bolt is rotatably mounted to the lock base about a rotational axis, the lock base has a receiving cavity for the lock shaft to enter, the latch bolt rotates to place the lock shaft in a latched state or an unlatched state in the receiving cavity, and when the lock shaft is in the latched state, the rotational axis of the latch bolt is higher than the axis of the lock shaft.

15. A battery pack assembly comprising a battery pack and a lock shaft assembly as claimed in any one of claims 1 to 12, said lock shaft being mounted to a side wall of said battery pack by said mounting.

16. The battery pack assembly of claim 15, further comprising a connecting plate having a receiving hole and a second mounting hole, the connecting plate having a first side and a second side opposite to the receiving hole, the locking shaft extending from the first side through the receiving hole and out of the second side, the mounting seat attached to the first side and connected to the connecting plate;

17. The battery pack assembly of claim 16, wherein the mounting socket is threadably connected to the connecting plate.

18. The battery pack assembly of claim 16, wherein the bottom of the connecting plate has an extension extending from the first side in a direction toward the battery pack.

19. The battery pack assembly of claim 18, wherein the extension is spaced apart to define a plurality of third mounting holes for attachment to a battery pack.

20. An electric vehicle, characterized in that it comprises a battery pack assembly according to any one of claims 15 to 19 and a locking mechanism for locking and fixing the lock shaft.