CN114714965A - A locking mechanism, quick change bracket component and electric motor car for battery package - Google Patents

Abstract

The invention discloses a locking mechanism for a battery pack, a quick-change bracket assembly and an electric vehicle. The locking mechanism includes: the lock base is provided with an opening and a cavity extending from the opening; the bolt can rotate relative to the lock base to change between an unlocking state and a locking state, and when the bolt is in the locking state, the bolt can prevent the lock shaft from leaving the cavity from the opening; and the resetting component is arranged on the lock base and acts on the bolt, and the resetting component is used for enabling the bolt to rotate along a locking direction so as to reset from an unlocking state to a locking state. The reset component is arranged to facilitate the reset of the lock tongue from the unlocking state to the locking state, so that the battery pack is convenient to mount and lock, and the lock tongue cannot be easily changed into the unlocking state under the action of the reset component, so that the locking is more reliable; locking mechanism can provide second grade locking or locking protect function for the battery package, is used for preventing that the battery package from dropping when current device locking is invalid, improves the security performance.

Description

Locking mechanism for battery pack, quick-change bracket assembly, and electric vehicle

This application is a divisional application of a Chinese patent application with an application date of December 29, 2017, an application number of 2017114788216, and an invention-creation title of "locking mechanism for battery pack, quick-change bracket assembly and electric vehicle".

technical field

The invention relates to a locking mechanism for a battery pack, a quick-change bracket assembly and an electric vehicle.

Background technique

The existing battery pack installation methods of electric vehicles are generally divided into fixed type and replaceable type. The fixed battery pack is generally fixed on the car, and the car is directly used as the charging object when charging. The replaceable battery pack is generally installed in an active way, and the battery pack can be removed at any time and replaced with a new battery pack.

In the process of replacing a new battery pack, the locking and unlocking of the battery pack is involved. Generally speaking, lock shafts are installed on the left and right sides of the battery pack; the locking device is fixed on the quick-change bracket to assemble a quick-change bracket assembly, and the quick-change bracket assembly is then installed on the chassis of the electric vehicle; the lock shaft and The locking device cooperates to realize the locking of the battery pack. However, the existing locking device only includes a first-level locking and lacks locking protection. Once a fault occurs, the locking fails, and the battery pack may fall, which brings a great safety hazard.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a locking mechanism for a battery pack, a quick-change bracket assembly and an electric vehicle in order to overcome the defects in the prior art.

The present invention solves the above-mentioned technical problems through the following technical solutions:

A locking mechanism for a battery pack, characterized in that the locking mechanism includes:

a lock base, the lock base is provided with an opening and a cavity extending from the opening, the opening is used for the lock shaft installed on the battery pack to enter the cavity;

a deadbolt that can be rotated relative to the lock base to change between an unlocked state and a locked state, when the deadbolt is in the locked state, the deadbolt can prevent all the lock shaft exits the cavity from the opening; and

a reset part, the reset part is arranged on the lock base and the reset part acts on the lock tongue, the top of the lock base is provided with a groove, and the reset part is at least partially located in the groove, The reset member can be elastically deformed, and the reset member is used to rotate the lock tongue in a locking direction to reset from the unlocked state to the locked state.

Preferably, the locking mechanism further includes an inner limit portion, when the lock tongue is in the locked state, the inner limit portion abuts against the lock tongue to prevent the lock tongue from moving along the lock tongue. The locking direction continues to rotate.

With the above arrangement, the inner limit portion is used to ensure that the lock tongue stays in the locked state.

Preferably, the inner limiting portion is an inner wall surface of the lock base that defines the cavity.

With the above arrangement, the structure is simple and ingenious.

Preferably, the locking mechanism further includes a centering shaft, the centering shaft is arranged on the lock base and the centering shaft is penetrated through the lock tongue, and the lock tongue can go around the lock. Spindle rotates.

Preferably, the reset component is a spring, the reset component has a contact portion and a connecting portion, the connecting portion is provided on the lock base, and the contact portion contacts the lock tongue to act on the lock. Said lock tongue.

Preferably, the reset component is a torsion spring, and the reset component also has a helical portion, the helical portion is connected with the contact portion and the connecting portion, and both the contact portion and the connecting portion can wrap around the helical portion. The upper part rotates to realize the elasticity change.

With the above arrangement, the reset of the reset component is realized by the elastic force change of the screw portion, so as to realize the reset of the lock tongue to the locked state.

Preferably, the locking mechanism further includes a rotating shaft, the rotating shaft is arranged on the lock base, and the screw portion is sleeved on the rotating shaft.

With the above arrangement, the movement range of the screw portion is limited, thereby preventing the reset member from detaching from the lock base.

Preferably, the reset component is arranged above the lock tongue.

With the above arrangement, compared with the structure in which the reset part is arranged under the lock tongue, the gravity of the lock tongue can prevent the reset part from causing resistance to reset; in addition, this arrangement also facilitates the lock shaft to enter the cavity from below.

Preferably, the groove communicates with the cavity.

Preferably, the locking tongue is at least partially located in the cavity, and the locking tongue can enter the cavity from the groove.

With the above arrangement, the locking tongue can be installed through the groove.

Preferably, the lock base is further provided with an unlocking hole, and the locking mechanism further includes an unlocking member, the unlocking member is arranged in the unlocking hole, and one end of the unlocking member is in contact with the lock tongue. , the unlocking member can act on the lock tongue to rotate the lock tongue in an unlocking direction to change from the locked state to the unlocked state.

With the above-mentioned arrangement, the unlocking component is easily unlocked.

Preferably, the unlocking component includes an unlocking spring, an unlocking head and an unlocking rod that are connected to each other, the unlocking hole is a stepped hole, a stepped portion is provided in the unlocking hole, and the inner diameter of the inner end of the unlocking hole is The inner diameter of the outer end of the unlocking hole is smaller than the inner diameter of the unlocking hole, the unlocking spring is at least partially located in the unlocking hole, and both ends of the unlocking spring are respectively abutted on the unlocking head and the step portion.

With the above arrangement, the unlocking spring plays a buffering role. After the unlocking is completed, the unlocking spring can also use its own elastic force to reset the unlocking head and the unlocking rod without disturbing the reset of the lock tongue to the locked state.

Preferably, the locking mechanism further includes an elastic member, the elastic member is at least partially located in the cavity, and the elastic member is used for abutting against the locking shaft.

With the above arrangement, the elastic member prevents the lock shaft from rigidly colliding with the lock base.

Preferably, the elastic component includes an elastic pad, the elastic pad is located in the cavity, and the elastic pad is used for abutting against the locking shaft.

Preferably, the elastic component further includes an elastic handle and an elastic head, the elastic handle and the elastic head are connected in sequence, the elastic handle is passed through the lock base, and the lock The wall portion of the base is clamped between the elastic pad and the elastic head.

With the above arrangement, the entire elastic member can be stably mounted on the lock base.

Preferably, the lock base is provided with a positioning hole, and the locking mechanism further includes a positioning pin, the positioning pin is partially located outside the positioning hole, and the positioning pin is in an interference fit with the positioning hole.

With the above arrangement, the positioning pin can be used for positioning when the locking mechanism is mounted on the quick-change bracket.

Preferably, the lock base is provided with a mounting hole, and the mounting hole is a threaded hole.

With the above arrangement, threaded fasteners can be passed through the mounting holes to mount the locking mechanism to the quick-change bracket.

Preferably, the opening is a bell mouth.

With the above arrangement, it is convenient for the lock shaft to enter the cavity.

A quick-change bracket assembly is characterized in that it includes a quick-change bracket and the above-mentioned locking mechanism, and the locking mechanism is fixedly arranged on the quick-change bracket.

Preferably, the quick-change bracket assembly further includes a first-level locking mechanism, the first-level locking mechanism includes a lock link, at least one first-level lock tongue, and at least one first-level lock base, and the first-level lock The base is fixed on the quick-change bracket, the first-level lock base is provided with a first-level opening and a first-level cavity extending from the first-level opening, and the first-level opening is used for installing on the battery pack The first-level lock shaft enters the first-level cavity, and the lock connecting rod is rotatably connected with at least one of the first-level lock tongues, and is used to drive the first-level lock tongue to rotate under the action of external force, so that the first-level lock The tongue is rotatable relative to the primary lock base to change between a primary unlocked state and a primary locked state, when the primary deadbolt is in the primary locked state, the primary lock The tongue can prevent the primary lock shaft from exiting the primary cavity from the primary opening.

Preferably, the primary locking mechanism and the locking mechanism are arranged on the same side of the quick-change bracket.

Preferably, the quick-change bracket assembly further includes a plurality of supporting devices, the supporting devices are arranged on the side of the quick-change bracket facing the battery pack, and are used for providing a plurality of supporting points for supporting the battery pack.

Preferably, the supporting device is provided with a supporting groove, and the lower surface of the supporting groove is located on the same plane as the lower surface of the cavity and the lower surface of the primary cavity.

An electric vehicle is characterized in that it includes a battery pack and the above-mentioned quick-change bracket assembly, the battery pack is mounted on the quick-change bracket assembly, and a lock shaft mounted on the battery pack is located in the cavity Inside.

Preferably, the electric vehicle includes a chassis, and the quick-change bracket assembly is fixed to the chassis.

On the basis of conforming to common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain preferred examples of the present invention.

The positive progressive effect of the present invention is:

In the locking mechanism for battery packs, the quick-change bracket assembly and the electric vehicle disclosed in the present invention, the reset component is provided to facilitate the reset of the lock tongue from the unlocked state to the locked state, so that the battery pack can be easily installed and locked. Under the action, the lock tongue will not easily change to the unlocked state, and the locking is more reliable; the locking mechanism can provide a secondary locking or locking protection function for the battery pack, which is used to prevent the battery pack when the existing device lock fails. Drop, improve safety performance.

Description of drawings

FIG. 1 is a schematic perspective view of a locking mechanism according to Embodiment 1 of the present invention.

FIG. 2 is a schematic front view of the locking mechanism according to Embodiment 1 of the present invention, wherein the locking shaft is also shown.

3 is a schematic cross-sectional view of the lock base of Embodiment 1 of the present invention.

FIG. 4 is an internal schematic view of the locking mechanism according to Embodiment 1 of the present invention, wherein the lock base is shown in cross section.

FIG. 5 is a schematic top view of the locking mechanism according to Embodiment 1 of the present invention.

FIG. 6 is a schematic perspective view of the reset component according to Embodiment 1 of the present invention.

FIG. 7 is a schematic perspective view of the elastic member according to Embodiment 1 of the present invention.

FIG. 8 is a partial schematic view of the quick-change bracket assembly according to Embodiment 1 of the present invention.

FIG. 9 is another partial schematic view of the quick-change bracket assembly according to Embodiment 1 of the present invention, wherein a part of which is overlapped with FIG. 8 .

FIG. 10 is a schematic perspective view of the reset component according to Embodiment 2 of the present invention.

Description of reference numbers:

100: Locking mechanism

110: Lock base

111: Opening

112: cavity

113: Groove

114: Unlock hole

1141: Steps

115: Positioning hole

116: Mounting holes

120: Lock tongue

130: Reset parts

131: Contact part

132: Connector

133: Spiral

140: Spindle

150: Inner limiter

160: Centering shaft

170: Unlock Parts

171: Unlock Spring

172: Unlock the head

173: Unlock the lever

180: elastic parts

181: Elastic Pad

182: Elastic handle

183: Elastic Head

190: Dowel pin

200: Lock shaft

30: Quick change bracket assembly

300: Primary locking mechanism

310: Level 1 Lock Base

311: Level 1 Opening

312: Primary cavity

320: Level 1 lock tongue

330: Lock Link

400: Support Device

500: Quick change bracket

Detailed ways

The present invention is further described below by way of examples, but the present invention is not limited to the scope of the described examples.

Example 1

As shown in Figures 1-7, the present embodiment discloses a locking mechanism 100 for a battery pack (not shown). The locking mechanism 100 includes a lock base 110 , a lock tongue 120 and a reset member 130 . The lock base 110 is provided with an opening 111 and a cavity 112 extending from the opening 111 . The opening 111 is used for the lock shaft 200 mounted on the battery pack to enter the cavity 112 . The deadbolt 120 is rotatable relative to the lock base 110 to change between an unlocked state and a locked state. When the lock tongue 120 is in the locked state, that is, the state shown in FIGS. 1 , 2 and 4 , the lock tongue 120 can prevent the lock shaft 200 from leaving the cavity 112 from the opening 111 . The reset member 130 is provided on the lock base 110 and acts on the lock tongue 120, the reset member 130 can be elastically deformed, and the reset member 130 is used to make the lock tongue 120 rotate in a locking direction to reset from the unlocked state to the locked state state.

This embodiment also discloses a quick-change bracket assembly, which includes a quick-change bracket and a locking mechanism 100. The locking mechanism 100 is fixed on the quick-change bracket; the quick-change bracket is generally a frame-shaped structure, and the locking mechanism 100 is fixed on the Inside the frame of the frame structure. The quick-change bracket can also be a plate-like structure, and the locking mechanism 100 can be fixed on the lower surface of the plate-like structure. At the same time, this embodiment also discloses an electric vehicle, which includes a chassis (not shown), a battery pack and a quick-change bracket assembly, the quick-change bracket assembly is fixed on the chassis, the battery pack is mounted on the quick-change bracket assembly, and is mounted on the battery pack The lock shaft 200 is located in the cavity 112 .

In the above, the reset component 130 is provided to facilitate the reset of the lock tongue 120 from the unlocked state to the locked state, so that the battery pack can be easily installed and locked, and under the action of the reset component 130, the lock tongue 120 will not easily change to the unlocked state, and the locking More reliable; the locking mechanism 100 can provide a secondary locking or locking protection function for the battery pack, and is used to prevent the battery pack from falling when the locking of the existing device fails, thereby improving the safety performance.

As specifically shown in FIGS. 1-4 , the opening 111 is preferably a bell mouth, so that the lock shaft 200 can enter the cavity 112 .

Referring to FIGS. 5-6 , the reset component 130 is a spring having a contact portion 131 and a connection portion 132 . The connecting portion 132 is disposed on the lock base 110 , and the contact portion 131 is in contact with the locking tongue 120 to act on the locking tongue 120 . The connecting portion 131 is inserted into the hole of the lock base 110 . Specifically, in this embodiment, the reset member 130 is a torsion spring, and the reset member 130 also has a helical portion 133. The helical portion 133 is connected to the contact portion 131 and the connecting portion 132. Both the contacting portion 131 and the connecting portion 132 can be wound around the helical portion. The portion 133 is rotated to realize the elastic force change. Specifically, the reset of the reset member 130 is realized by the change of the elastic force of the helical portion 133, so as to realize the reset of the lock tongue 120 to the locked state. In an alternative embodiment, the reset component may not have a helical portion, and the contact portion and the connecting portion may be directly connected and bent. In this embodiment, as shown in FIGS. 5-6 , the contact portion 131 and the connection portion 132 are respectively connected to both ends of the spiral portion 133 .

Meanwhile, in order to limit the movement range of the screw portion 133 , the locking mechanism 100 further includes a rotating shaft 140 . In this way, the reset component 130 will not be separated from the lock base 110 during use. In this embodiment, the rotating shaft 140 is formed by rolling a sheet and is a hollow shaft.

It can be seen from FIGS. 1-2 and 4-5 that the reset component 130 is arranged above the locking tongue 120 . Compared with the structure in which the reset component is disposed under the lock tongue, the gravity of the lock tongue 120 can prevent the reset component 130 from causing resistance to reset; in addition, this arrangement also facilitates the lock shaft 200 entering the cavity 112 from below.

In addition, the locking mechanism 100 further includes an inner limiting portion 150 , a centering shaft 160 , an unlocking member 170 , an elastic member 180 and a positioning pin 190 . The lock base 110 is provided with a groove 113 , an unlocking hole 114 , a positioning hole 115 and a mounting hole 116 . The following will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 3-4 , when the lock tongue 120 is in the locked state, the inner limiting portion 150 abuts against the lock tongue 120 to prevent the lock tongue 120 from continuing to rotate in the locking direction. In this embodiment, the inner limiting portion 150 is specifically the inner wall surface of the lock base 110 that defines the cavity 112 . The structure is simple and ingenious, and can be used to ensure that the lock tongue 120 stays in the locked state without any extra components.

As shown in FIG. 1 and FIGS. 3-5 , the groove 113 is provided on the top of the lock base 110 , the groove 113 communicates with the cavity 112 , and the reset component 130 is at least partially located in the groove 113 . In the state shown in the figure, the reset component 130 is partially located in the cavity 112 . The locking tongue 120 is at least partially located in the cavity 112 , and the locking tongue 120 can enter the cavity 112 from the groove 113 . In this way, the locking tongue 120 can be installed through the groove 113 . During the transition between the locked state and the unlocked state, the locking tongue 120 can enter and exit the groove 113 .

As shown in FIGS. 1-2 and 4 , the centering shaft 160 is disposed on the lock base 110 and the centering shaft 160 is passed through the locking tongue 120 , and the locking tongue 120 can rotate around the centering shaft 160 .

As shown in FIGS. 2-5 , the unlocking member 170 is disposed in the unlocking hole 114 , and one end of the unlocking member 170 is in contact with the locking tongue 120 . The unlocking part 170 can act on the lock tongue 120 to rotate the lock tongue 120 in an unlocking direction to change from the locking state to the unlocking state, so that the unlocking part 170 conveniently completes the unlocking. In the orientation in the figure, the right end of the unlocking member 170 is in contact with the locking tongue 120, and the unlocking direction is counterclockwise. Specifically, the unlocking part 170 includes the unlocking spring 171 , and the unlocking head 172 and the unlocking lever 173 which are connected to each other. The unlocking hole 114 is a stepped hole, the unlocking hole 114 is provided with a step portion 1141 , and the inner diameter of the inner end of the unlocking hole 114 is smaller than the inner diameter of the outer end of the unlocking hole 114 . The unlocking spring 171 is at least partially located in the unlocking hole 114 , and two ends of the unlocking spring 171 abut against the unlocking head 172 and the step portion 1141 respectively. In the initial stage of unlocking, as shown in FIG. 4 , both ends of the unlocking spring 171 have not yet abutted against the unlocking head 172 and the step part 1141 , but as the unlocking member 170 moves from left to right, the Both ends abut against the unlocking head 172 and the stepped portion 1141 . The unlocking spring 171 plays a buffering role. After the unlocking is completed, the unlocking spring 171 can also use its own elastic force to reset the unlocking head 172 and the unlocking rod 173 to the left, and will not reset the lock tongue 120 clockwise to the locked state. cause interference.

As shown in FIG. 4 and FIG. 7 , the elastic member 180 is at least partially located in the cavity 112 , and the elastic member 180 is used for abutting against the locking shaft 200 . The elastic member 180 does not necessarily need to be in contact with the lock shaft 200 , but once in contact, the lock shaft 200 can be prevented from rigidly colliding with the lock base 110 . Specifically, the elastic member 180 includes an elastic pad 181 , an elastic handle 182 and an elastic head 183 . The elastic pad 181 is located in the cavity 112 , and the elastic pad 181 is used for abutting against the locking shaft 200 . The elastic handle portion 182 and the elastic head portion 183 are connected in sequence. The elastic handle portion 182 passes through the lock base 110 , and the wall portion of the lock base 110 is clamped between the elastic pad 181 and the elastic head portion 183 . In this way, the entire elastic member 180 can be stably mounted on the lock base 110 . The elastic member 180 is preferably made of rubber.

As shown in FIG. 5 , the positioning pin 190 is partially located outside the positioning hole 115 , and the positioning pin 190 and the positioning hole 115 are in interference fit. The locating pin 190 can be used for positioning when the locking mechanism 100 is mounted on the quick-change bracket.

As shown in FIG. 3 , the mounting holes 116 are preferably threaded holes. Threaded fasteners may pass through the mounting holes 116 to mount the locking mechanism 100 to the quick-change bracket.

Next, referring mainly to FIG. 2 and FIG. 4 , the working process of the locking mechanism 100 is briefly described, mainly including an unlocking process and a locking process, wherein the initial states are both locked states.

Unlocking process: a rightward force is applied to the unlocking head 172, and the unlocking rod 173 acts on the lock tongue 120, so that the lock tongue 120 rotates counterclockwise; the lock tongue 120 acts on the contact part 131 of the reset member 130, so that the reset member The elastic force of 130 changes; after the lock tongue 120 is rotated to a certain angle, a channel for the lock shaft 200 to pass through is formed in the cavity 112; the lock shaft 200 can move from right to left, and then moves down through the opening 111, leaving the lock Institution 100.

Locking process: the lock shaft 200 moves upward under the action of external force, and enters the cavity 112 through the opening 111 . The lock shaft 200 acts on the lock tongue 120 to make the lock tongue 120 rotate counterclockwise; the lock tongue 120 acts on the contact of the reset component 130 part 131, so that the elastic force of the reset part 130 changes; after the lock tongue 120 is rotated to a certain angle, a channel for the lock shaft 200 to pass through is formed in the cavity 112, and the lock shaft 200 can move from left to right; until the lock shaft 200 does not After contacting with the lock tongue 120 again, the lock tongue 120 rotates clockwise under the action of the reset component 130 and resets to the locked state.

Referring to FIGS. 8 and 9 , the following describes the quick-change bracket assembly 30 , which uses the locking mechanism 100 as the secondary locking mechanism and further includes the primary locking mechanism 300 .

The primary locking mechanism 300 includes a lock link 330 , at least one primary lock tongue 320 , and at least one primary lock base 310 . The primary lock base 310 is fixed on the quick-change bracket 500 . In this embodiment, three first-level lock bases 310 and three first-level lock tongues 320 are respectively provided on both sides of the frame of the quick-change bracket 500 . 8 and 9 are partial schematic views of one side.

The primary lock base 310 is provided with a primary opening 311 and a primary cavity 312 extending from the primary opening 311. The primary opening 311 is used for a primary locking shaft (the structure is the same as or similar to that of the locking shaft 200) installed on the battery pack. ) into the primary cavity 312. The lock link 330 is rotatably connected with at least one primary lock tongue 320, and is used to drive the primary lock tongue 320 to rotate under the action of an external force, so that the primary lock tongue 320 can rotate relative to the primary lock base 310 so that the primary lock tongue 320 can rotate relative to the primary lock base 310. Change between unlocked state and primary locked state. When the primary locking tongue 320 is in the primary locking state, the primary locking tongue 320 can prevent the primary locking shaft from leaving the primary cavity 312 from the primary opening 311 . The “primary locking state” refers to the locked state of the primary locking mechanism 300 ; the “primary unlocking state” refers to the unlocking state of the primary locking mechanism 300 .

The primary locking mechanism 300 and the locking mechanism 100 are provided on the same side of the quick-change bracket 500 . That is, the side with the primary locking mechanism 300 is also provided with the locking mechanism 100 ; if both sides are provided with the primary locking mechanism 300 , then the two sides are also provided with the locking mechanism 100 . In this embodiment, the two inner sides of the frame of the quick-change bracket 500 , that is, the two inner sides facing the battery pack, are provided with a primary locking mechanism 300 and are also provided with a locking mechanism 100 .

In addition, the quick-change bracket assembly 30 further includes a plurality of support devices 400 . The support devices 400 are disposed on the side of the quick-change bracket 500 facing the battery pack to provide a plurality of support points for supporting the battery pack. The support device 400 is also located on the same side as the primary locking mechanism 300 and the locking mechanism 100 . The primary locking mechanism 300 in FIGS. 8 and 9 overlaps, and FIGS. 8 and 9 show the support device 400 in different positions.

In this embodiment, the support device 400 is similar in structure to the lock base 110 , has no locking function, and only serves as a support platform for the battery pack. In other embodiments, other similar supporting mechanisms with supporting platforms can be applied. The number of the supporting devices 400 can be adjusted according to the actual weight of the battery pack, and preferably, the average weight of each supporting device 400 does not exceed 25KG.

The support device 400 is provided with a support groove, and the lower surface of the support groove is located on the same plane as the lower surface of the cavity 112 and the lower surface of the primary cavity 312 . The lower surface of the support groove, the lower surface of the cavity 112 and the lower surface of the primary cavity 312 all refer to the surface close to the ground when in use, and are responsible for the special lock shaft for the support of the battery pack, the lock shaft 200 and the primary lock shaft. The support function, the three are located on the same plane, which can make the battery pack move smoothly.

The unlocking process and the locking process of the primary locking mechanism 300 and the locking mechanism 100 are similar and basically synchronized.

Example 2

This embodiment discloses a locking mechanism for a battery pack, the structure of which is generally similar to that of Embodiment 1, except that the structure of the reset component 130 is different from that of Embodiment 1.

In this embodiment, as shown in FIG. 10 , the reset component 130 includes two connecting parts 132 , two spiral parts 133 and one contact part 131 . The two connecting parts 132 are respectively connected to the outer sides of the two spiral parts 133 , and the contact part 131 is connected between the two spiral parts 133 .

In the description of the present invention, an embodiment may be provided with multiple drawings, and the reference numerals of the same components in the same embodiment are not necessarily marked in each drawing; however, those skilled in the art should understand that, When describing one or more drawings in the embodiment, it may be understood in conjunction with other drawings in the embodiment; those skilled in the art should understand that if there is no indication of which one the text specifically corresponds to When drawing, it can be understood in conjunction with all drawings in this embodiment.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device. Or elements must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

Although the specific embodiments of the present invention are described above, those skilled in the art should understand that this is only an illustration, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims (25)

1. A locking mechanism for a battery pack, said locking mechanism comprising:

the lock base is provided with an opening and a cavity extending from the opening, and the opening is used for allowing a lock shaft mounted on the battery pack to enter the cavity;

a locking bolt rotatable relative to the lock base to change between an unlocked state and a locked state, the locking bolt being capable of preventing the lock shaft from exiting the cavity from the opening when the locking bolt is in the locked state; and

reset unit, reset unit locates the lock base just reset unit acts on the spring bolt, lock base top is equipped with the recess, reset unit at least part is located in the recess, reset unit can take place elastic deformation, reset unit is used for making the spring bolt rotates in order to follow along a locking direction the unblock state resets to the locking state.

2. The lock mechanism of claim 1, further comprising an inner limit portion, wherein when the locking bolt is in the locked state, the inner limit portion abuts against the locking bolt to prevent the locking bolt from continuing to rotate in the locking direction.

3. The lock mechanism of claim 2, wherein the internal restraint is an interior wall surface of the lock base that defines the cavity.

4. The latch mechanism of claim 1, further comprising a centering shaft disposed on the lock base and extending through the latch bolt, wherein the latch bolt is rotatable about the centering shaft.

5. The lock mechanism of claim 1, wherein the return member is a spring, the return member having a contact portion and a connecting portion, the connecting portion being disposed on the lock base, the contact portion contacting the latch tongue to act on the latch tongue.

6. The lock mechanism of claim 5, wherein the return member is a torsion spring, the return member further having a coil portion connected to both the contact portion and the connecting portion, the contact portion and the connecting portion being rotatable about the coil portion to vary the spring force.

7. The lock mechanism of claim 6, further comprising a shaft disposed on the lock base, wherein the screw is disposed on the shaft.

8. The latch mechanism of claim 1 wherein said reset member is disposed above said latch bolt.

9. The latch mechanism of claim 8 wherein said recess is in communication with said cavity.

10. The latch mechanism of claim 9, wherein said locking bolt is at least partially disposed within said cavity, said locking bolt being capable of entering said cavity from said recess.

11. The locking mechanism of claim 1, wherein the lock base further comprises an unlocking hole, the locking mechanism further comprises an unlocking member, the unlocking member is disposed in the unlocking hole, one end of the unlocking member is in contact with the locking tongue, and the unlocking member is capable of acting on the locking tongue to rotate the locking tongue in an unlocking direction to change from the locked state to the unlocked state.

12. The locking mechanism of claim 11, wherein the unlocking member comprises an unlocking spring, and an unlocking head and an unlocking rod connected to each other, the unlocking hole is a stepped hole, a step portion is provided in the unlocking hole, an inner diameter of an inner end of the unlocking hole is smaller than an inner diameter of an outer end of the unlocking hole, the unlocking spring is at least partially located in the unlocking hole, and two ends of the unlocking spring abut against the unlocking head and the step portion respectively.

13. The locking mechanism of claim 1, further comprising a resilient member at least partially disposed within the cavity, the resilient member configured to abut the lock shaft.

14. The locking mechanism of claim 13, wherein said resilient member comprises a resilient pad positioned within said cavity, said resilient pad adapted to abut said lock shaft.

15. The lock mechanism as claimed in claim 14, wherein the resilient member further comprises a resilient handle and a resilient head, the resilient handle and the resilient head are connected in sequence, the resilient handle is inserted into the lock base, and the wall of the lock base is clamped between the resilient pad and the resilient head.

16. The locking mechanism of claim 1, wherein the lock base defines a locating hole, and further comprising a locating pin partially disposed outside the locating hole and having an interference fit with the locating hole.

17. The locking mechanism of claim 1, wherein the lock base is provided with a mounting hole, the mounting hole being a threaded hole.

18. The latch mechanism of any of claims 1-17, wherein the opening is flared.

19. A quick-change holder assembly, characterized in that it comprises a quick-change holder and a locking mechanism according to any one of claims 1-18, which is fixedly arranged to the quick-change holder.

20. The quick-change bracket assembly of claim 19, further comprising a primary locking mechanism, the first-stage locking mechanism comprises a lock connecting rod, at least one first-stage lock tongue and at least one first-stage lock base, the primary lock base is fixedly arranged on the quick-change bracket, the primary lock base is provided with a primary opening and a primary cavity extending from the primary opening, the primary opening is used for allowing a primary lock shaft arranged on the battery pack to enter the primary cavity, the lock connecting rod is rotatably connected with at least one primary lock tongue, is used for driving the first-stage lock tongue to rotate under the action of external force, so that the first-stage lock tongue can rotate relative to the first-stage lock base to change between a first-stage unlocking state and a first-stage locking state, when the first-stage spring bolt is in the first-stage locking state, the first-stage spring bolt can prevent the first-stage lock shaft from leaving the first-stage cavity from the first-stage opening.

21. The quick-change holder assembly according to claim 20, wherein the primary locking mechanism and the locking mechanism are disposed on the same side of the quick-change holder.

22. The quick-change bracket assembly according to claim 21, further comprising a plurality of support means provided on a side of the quick-change bracket facing the battery pack for providing a plurality of support points for supporting the battery pack.

23. The quick-change bracket assembly according to claim 22, wherein the support means is provided with a support slot having a lower surface that is coplanar with the lower surface of the cavity and the lower surface of the primary cavity.

24. An electric vehicle comprising a battery pack and a quick-change bracket assembly according to any one of claims 19 to 23, the battery pack being mounted to the quick-change bracket assembly with a latch shaft mounted to the battery pack located in the cavity.

25. The electric vehicle of claim 24, wherein the electric vehicle includes a chassis, and wherein the quick-change bracket assembly is secured to the chassis.

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