Rising bead type quick change locking mechanism, locking device, battery pack and electric vehicle

Abstract

The application discloses a kind of quick-change locking mechanism of swelling bead, locking device, battery pack and electric vehicle, quick-change locking mechanism of swelling bead includes lock base, multiple ball bearings and drive assembly, multiple ball bearings are located in lock base and can move in lock base, drive assembly pushes multiple ball bearings to realize multiple ball bearings mutual approach to lock shaft side recess to make lock shaft lock or drive assembly is far from multiple ball bearings to make multiple ball bearings far from recess to unlock lock shaft, lock shaft is inserted into lock base, drive assembly pushes multiple ball bearings to gather, and is in contact with lock shaft side recess, to lock lock shaft, when needing to be unlocked, drive assembly is far from ball bearing, ball bearing is far from lock shaft, to unlock lock shaft, the device simple structure, the steps of unlocking and locking are less, lock shaft can be quickly locked or unlocked, multiple ball bearings lock lock shaft simultaneously, can strengthen the stability of lock shaft locking.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery locking, in particular to a quick-change locking mechanism with expanding beads, a locking device, a battery pack and an electric vehicle. BACKGROUND

[0002] The existing battery pack installation method of electric vehicles is generally divided into fixed type and replaceable type. The battery pack of the fixed type is generally fixed on the vehicle, and the vehicle is directly used as the charging object during charging. The battery pack of the replaceable type is generally installed in a movable manner, and the battery pack can be removed and replaced at any time. When the battery pack is installed in the movable manner, the battery pack is locked and installed on the bottom of the electric vehicle through a locking mechanism. When the battery pack is removed from the locking mechanism, an external unlocking mechanism acts on the locking mechanism on the electric vehicle to unlock the battery pack from the locking mechanism, and then the battery pack is removed.

[0003] At present, the locking mechanism used on the electric vehicle generally has a complex overall structure and a cumbersome unlocking process, which leads to low battery disassembly efficiency and cannot achieve the effect of quickly disassembling and assembling the battery pack. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the defects of the locking mechanism of the electric vehicle in the prior art, such as complex structure, cumbersome unlocking process and inability to quickly disassemble and assemble the battery pack.

[0005] To solve the first technical problem, the present application provides a quick-change locking mechanism with expanding beads, a locking device, a battery pack and an electric vehicle.

[0006] The technical solution adopted by the present application to solve the first technical problem is: a quick-change locking mechanism with expanding beads, comprising a lock base, a plurality of rolling beads and a driving assembly. The plurality of rolling beads are arranged in the lock base and can move in the lock base. The driving assembly pushes the plurality of rolling beads to realize mutual approach of the plurality of rolling beads to abut against the recess on the side of the lock shaft to lock the lock shaft, or the driving assembly moves away from the plurality of rolling beads to move the plurality of rolling beads away from the recess to unlock the lock shaft.

[0007] In this scheme, the lock shaft is inserted into the lock base, the driving assembly pushes the plurality of rolling beads to approach and abut against the recess on the side of the lock shaft to lock the lock shaft. When unlocking is needed, the driving assembly moves away from the rolling beads, and the rolling beads move away from the lock shaft to unlock the lock shaft. The present device has a simple overall structure, the steps of unlocking and locking are simple, the lock shaft can be quickly locked or unlocked, and the plurality of rolling beads can simultaneously lock the lock shaft to enhance the stability of the lock shaft.

[0008] Preferably, the ball rising quick-change locking mechanism further comprises a guide mechanism, the driving assembly pushes or moves away the plurality of balls, so that the plurality of balls move in the guide mechanism to a locking position or an unlocking position to lock or unlock the lock shaft.

[0009] In this scheme, the guide mechanism is used to define the path of the ball movement, so as to avoid the ball from leaving the guide mechanism, and to enable the ball to move between the locking position and the unlocking position.

[0010] Preferably, the guide mechanism comprises a containing cavity, the containing cavity is provided with an opening, the edge of the opening extends inwardly to form an inner wall of the containing cavity, the plurality of balls are arranged in the containing cavity, and the balls abut against the inner wall.

[0011] In this scheme, the ball can move in the containing cavity, and the inner wall of the containing cavity abuts against the ball to limit the movement of the ball in the direction close to the inner wall.

[0012] Preferably, the guide mechanism further comprises a limiting part, the limiting part is arranged in the containing cavity, the plurality of balls are arranged between the limiting part and the inner wall, and the limiting part abuts against the balls, the driving assembly pushes or moves away the plurality of balls to move the plurality of balls between the limiting part and the inner wall.

[0013] In this scheme, the limiting part limits the movement of the ball in the direction close to the limiting part, the ball is clamped between the limiting part and the inner wall, the ball is limited to move between the limiting part and the inner wall, the driving assembly is used to drive the balls to gather and abut against the recess of the lock shaft, or the driving assembly is separated from the balls to move the balls away from the recess of the lock shaft.

[0014] Preferably, the side of the limiting part close to the balls is provided with a plurality of sliding channels, the plurality of sliding channels correspond to the plurality of balls one by one, the balls are arranged in the sliding channels and move in the sliding channels.

[0015] In this scheme, the sliding channel defines the movement direction of the ball, i.e. the direction close to or away from the lock shaft, so as to avoid the collision between adjacent balls, and to stabilize the balls.

[0016] Preferably, the limiting part extends towards the balls to form a first flange part, the first flange part is used to block the balls from leaving the limiting part; and / or, the inner wall extends towards the balls to form a second flange part, the second flange part is used to block the balls from leaving the inner wall.

[0017] In the present scheme, when the lock shaft is not inserted into the accommodating cavity, the balls are easy to be separated from the slide way when gathering to the limit position, the first flange part is used to resist the upper side of the balls, and plays a role of limiting the balls from being separated from the slide way when gathering; in addition, when the balls gather to the limit position, the balls abut against the second flange part, and the second flange part also plays a role of limiting the balls from being separated from the slide way when gathering to the limit position.

[0018] Preferably, the driving assembly comprises a driving member provided with an abutting surface matched with the outer peripheral side of the plurality of balls, and the driving member slides in the accommodating cavity to push the plurality of balls to gather to the locking position.

[0019] In the present scheme, the driving member slides in the accommodating cavity to make the abutting surface abut against the outer peripheral side of the plurality of balls, and the abutting surface pushes the plurality of balls to gather simultaneously with the movement of the driving member, and the driving member moves reversely to make the abutting surface away from the plurality of balls, and the balls are away from the lock shaft; the present arrangement can use one driving member to drive the plurality of balls simultaneously, and the structure is simple and not easy to be damaged.

[0020] Preferably, the abutting surface is an inclined surface surrounding the outer side of the plurality of balls in the circumferential direction, so as to limit the plurality of balls from opening outward.

[0021] In the present scheme, with the up-down movement of the driving member, the inclined surface converts the up-down movement of the driving member into the inward-outward movement of the balls in the horizontal direction.

[0022] Preferably, the driving assembly further comprises a first elastic member, the limiting part is in sliding connection with the inner wall of the accommodating cavity, and the two ends of the first elastic member abut against the limiting part and the driving member respectively, and the first elastic member applies a force away from each other to the limiting part and the driving member.

[0023] In the present scheme, the first elastic member pushes the limiting part, and provides an elastic force for the limiting part to abut against the balls, so as to continuously clamp the balls by the limiting part and the inner wall.

[0024] Preferably, the driving assembly comprises a nut member and a screw member, the nut member is fixedly arranged on the lock base, and the screw member is threadedly connected to the nut member and moves relative to the nut member, so as to realize the movement of the screw member close to or away from the plurality of balls.

[0025] In the present scheme, the screw member rotates relative to the nut member, the screw member abuts against the driving member, and drives the driving member to drive the balls to gather, and the screw member provides a driving force for the movement of the plurality of balls, and the rotation movement of the screw member is converted into linear movement through the thread cooperation between the screw member and the nut member, the stability of the movement of the screw member is high, the thread cooperation amplifies the stroke of the movement of the driving member, and the movement of the driving member is convenient to be accurately adjusted.

[0026] Preferably, the quick-change locking mechanism further comprises at least one limiting component connected to and moving along the nut member, so as to connect the limiting component to the screw rod member to limit the movement of the screw rod member when the plurality of balls are gathered to lock the lock shaft.

[0027] In this scheme, the limiting component can be connected to the screw rod member to limit the movement of the screw rod member, and when the plurality of balls are gathered to lock the lock shaft, the sudden loosening of the balls is avoided, thereby improving the locking reliability and the safety of the device.

[0028] Preferably, the quick-change locking mechanism further comprises a second elastic member arranged in the driving assembly, and one end of the second elastic member abuts against the limiting component, so as to restore the limiting component to an initial state in which the limiting component locks the movement of the screw rod member.

[0029] In this scheme, the second elastic member enables the limiting component to lock the screw rod member in the default state, so that the balls are always limited in the default state, thereby continuously avoiding the sudden loosening of the balls and improving the safety of the device.

[0030] Preferably, the screw rod member comprises a limiting disc and a screw rod, the end of the screw rod is connected to the limiting disc, the screw rod is threadedly connected to the nut member, and the limiting component is connected to the limiting disc to lock the limiting disc or is disconnected from the limiting disc to unlock the limiting disc.

[0031] In this scheme, the limiting component controls the rotation of the screw rod by limiting the limiting disc, and since the diameter of the limiting disc is greater than the diameter of the screw rod, the load on the limiting component is reduced, and the risk of damage to the limiting component due to stress is reduced.

[0032] Preferably, the outer edge of the limiting disc is provided with a plurality of limiting grooves, and the limiting component is inserted into the limiting grooves to lock the rotation of the limiting disc.

[0033] In this scheme, since the outer edge of the limiting disc is provided with the limiting grooves, the part of the limiting component in contact with the limiting disc is located at the outer edge of the limiting disc, and the diameter of the screw rod can be maximally enlarged, thereby maximally reducing the load on the limiting component.

[0034] Preferably, the limiting component comprises a limiting portion and a guide portion, the limiting portion is connected to the end of the guide portion, and the limiting portion extends radially outward along the guide portion, so that the outer diameter of the limiting portion is greater than the outer diameter of the guide portion, the nut member is provided with a guide hole, the guide portion passes through the guide hole and moves in the guide hole, so that the limiting portion is clamped in the limiting grooves of the limiting disc or is disconnected from the limiting grooves of the limiting disc.

[0035] In the present solution, the guide hole limits the moving direction of the guide part, the limiting part is used to be clamped in the limiting groove of the limiting disc, and the limiting part bears the main load.

[0036] A locking device includes a locking shaft and the above-mentioned expanding bead type quick-change locking mechanism.

[0037] Preferably, the locking shaft includes a mounting seat, an elastic component and a locking shaft body, the elastic component is connected to the mounting seat, one end of the locking shaft body is connected to the elastic component, and the other end of the locking shaft body is used to be locked in a plurality of the beads.

[0038] In the present solution, the locking shaft body is floatingly connected to the mounting seat through the elastic component, and the locking shaft has a certain damping effect when the locking shaft is locked in the expanding bead type quick-change locking mechanism.

[0039] Preferably, the outer circumferential surface of the locking shaft body is provided with a concave surface for cooperating with the beads.

[0040] In the present solution, the beads cooperate with the concave surface of the locking shaft body, so as to limit the locking shaft body in the accommodating cavity, and due to the existence of the concave surface, the beads are less likely to be separated from the side surface of the locking shaft body, so that the locking shaft body can be stably locked in the expanding bead type quick-change locking mechanism.

[0041] Preferably, the mounting seat is provided with a movable cavity, the locking shaft body includes a floating plate and a locking rod, the floating plate is arranged in the movable cavity, an annular movable gap is formed between the side edge of the floating plate and the inner wall of the movable cavity, the elastic component is filled in the annular movable gap, one end of the locking rod is connected to the floating plate, and the other end of the locking rod is used to be locked in a plurality of the beads.

[0042] In the present solution, the elastic component is filled in the annular gap, so that the outer periphery of the floating plate is subjected to uniform elastic force, and after the floating plate is moved under force, it can rebound to the central position and has a certain self-centering ability.

[0043] A battery pack includes the above-mentioned expanding bead type quick-change locking mechanism.

[0044] Preferably, the battery pack includes a battery pack body, the four peripheral sides of the battery pack body are provided with the locking shafts or the locking bases, or the upper surface of the battery pack body is provided with the locking shaft or the locking base.

[0045] In the present solution, the battery pack body applies the locking shaft or the locking base, so that the battery pack body can be quickly and conveniently locked or unlocked at a set position.

[0046] An electric vehicle includes the above-mentioned expanding bead type quick-change locking mechanism.

[0047] In the present solution, the battery assembly can be quickly and conveniently locked or unlocked in the electric vehicle through the expanding-ball quick-change locking mechanism.

[0048] On the basis of common general knowledge in the art, the above-mentioned preferred conditions can be combined arbitrarily, thereby obtaining various preferred examples of the present application.

[0049] The positive progress effect of the present application is that when the device is used, the lock shaft is inserted into the lock base, the driving assembly pushes the plurality of balls together and abuts against the side recess of the lock shaft to lock the lock shaft, when unlocking is needed, the driving assembly is away from the balls, and the balls are away from the lock shaft to unlock the lock shaft, the device is simple in overall structure, the steps of unlocking and locking are simple, the lock shaft can be quickly locked or unlocked, and the plurality of balls can simultaneously lock the lock shaft, thereby enhancing the stability of the lock shaft. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 It is a front view of the locking device embodiment of the present application.

[0051] Figure 2 It is Figure 1 It is a structural schematic view of the bottom of the locking device.

[0052] Figure 3 It is a structural exploded view of the expanding-ball quick-change locking mechanism of the present application.

[0053] Figure 4 It is a longitudinal sectional view of the locking device of the present application.

[0054] Figure 5 It is a state view of the locking of the lock shaft in the expanding-ball quick-change locking mechanism of the present application.

[0055] Figure 6 It is a state view of the unlocking of the lock shaft in the expanding-ball quick-change locking mechanism of the present application.

[0056] Figure 7 It is a structural schematic view of one embodiment of the lock shaft of the present application.

[0057] Explanation of reference signs:

[0058] Lock shaft 10

[0059] Mounting seat 11

[0060] Movable cavity 12

[0061] Elastic component 13

[0062] Floating plate 15

[0063] Lock rod 16

[0064] Annular movable gap 17

[0065] Ball-type quick-change locking mechanism 18

[0066] Lock base 19

[0067] Ball 20

[0068] Concave 21

[0069] Accommodating chamber 22

[0070] Opening 23

[0071] Inner wall 24

[0072] Limiting portion 25

[0073] Slide 26

[0074] First flange portion 27

[0075] Second flange portion 28

[0076] Driving member 29

[0077] Inclined surface 30

[0078] First elastic member 31

[0079] The second elastic member 32

[0080] Nut 33

[0081] Screw 34

[0082] Restriction component 35

[0083] Restriction unit 36

[0084] Guide portion 37

[0085] Guide hole 38

[0086] Restriction disk 39

[0087] Screw 40

[0088] Restriction slot 41

[0089] Bolt 42

[0090] Spring slot 43

[0091] Inlay 44

[0092] Threaded hole 45

[0093] Cover 46

[0094] Through groove 47

[0095] Tooth 48

[0096] Hollow groove 49

[0097] First sliding groove 50

[0098] Protrusion 51

[0099] Second sliding groove 52

[0100] Inner cavity 53

[0101] Circular arc sliding plate 54

[0102] Longitudinal slot 55 DETAILED DESCRIPTION

[0103] The present application will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, but the application should not be construed as being limited to the embodiments set forth herein.

[0104] Example 1

[0105] Figures 1-6 As shown in the drawings, the present application is a locking device, which comprises a lock shaft 10 and a quick-change locking mechanism 18, the quick-change locking mechanism 18 comprises a lock base 19, a plurality of rolling balls 20 arranged in the lock base 19 and capable of moving in the lock base 19, and a driving assembly for pushing the rolling balls 20 to move towards each other to abut against a recess on the side of the lock shaft 10 to lock the lock shaft 10 or to move away from the rolling balls 20 to move the rolling balls 20 away from the recess to unlock the lock shaft 10. Figure 1 and Figure 4 As shown in the drawings, the present application is a locking device, which comprises a lock shaft 10 and a quick-change locking mechanism 18, the quick-change locking mechanism 18 comprises a lock base 19, a plurality of rolling balls 20 arranged in the lock base 19 and capable of moving in the lock base 19, and a driving assembly for pushing the rolling balls 20 to move towards each other to abut against a recess on the side of the lock shaft 10 to lock the lock shaft 10 or to move away from the rolling balls 20 to move the rolling balls 20 away from the recess to unlock the lock shaft 10.

[0106] As shown in the drawings, the present application is a locking device, which comprises a lock shaft 10 and a quick-change locking mechanism 18, the quick-change locking mechanism 18 comprises a lock base 19, a plurality of rolling balls 20 arranged in the lock base 19 and capable of moving in the lock base 19, and a driving assembly for pushing the rolling balls 20 to move towards each other to abut against a recess on the side of the lock shaft 10 to lock the lock shaft 10 or to move away from the rolling balls 20 to move the rolling balls 20 away from the recess to unlock the lock shaft 10. Figure 4 As shown in the drawings, the present application is a locking device, which comprises a lock shaft 10 and a quick-change locking mechanism 18, the quick-change locking mechanism 18 comprises a lock base 19, a plurality of rolling balls 20 arranged in the lock base 19 and capable of moving in the lock base 19, and a driving assembly for pushing the rolling balls 20 to move towards each other to abut against a recess on the side of the lock shaft 10 to lock the lock shaft 10 or to move away from the rolling balls 20 to move the rolling balls 20 away from the recess to unlock the lock shaft 10.

[0107] Preferably, the quick-change locking mechanism 18 further comprises a guide mechanism, the driving assembly pushes or moves away from the rolling balls 20 to move the rolling balls 20 to a locking position or an unlocking position in the guide mechanism to lock or unlock the lock shaft 10.

[0108] In this example, the guide mechanism is used to define the path of movement of the rolling balls 20 to avoid the rolling balls 20 from escaping from the guide mechanism, so that the rolling balls 20 can move between the locking position and the unlocking position.

[0109] Preferably, the guiding mechanism comprises a receiving cavity 22, the receiving cavity 22 is provided with an opening 23, the edge of the opening 23 extends inwardly to form an inner wall 24 of the receiving cavity 22, a plurality of balls 20 are arranged in the receiving cavity 22, and the balls 20 abut against the inner wall 24.

[0110] As shown in Figure 4 In the present example, the lock base 19 has a cylindrical receiving cavity 22, the receiving cavity 22 has an opening 23 at the upper side, and the opening 23 is provided with a circular ring baffle, i.e. the inner wall 24 of the receiving cavity 22, as shown in Figure 4 The circular ring baffle is used to block the balls 20 from moving upward out of the receiving cavity 22.

[0111] In particular, the circular ring baffle has a trumpet-shaped opening in the middle, which guides the lock shaft 10 and facilitates the lock shaft 10 to pass through the trumpet-shaped opening and enter the receiving cavity 22.

[0112] The lower side of the lock base 19 is provided with a mounting plate, and the mounting plate is provided with a bolt 42 assembly to facilitate the installation of the lock base 19 on a designated device.

[0113] Preferably, the guiding mechanism further comprises a limiting part 25, the limiting part 25 is arranged in the receiving cavity 22, the plurality of balls 20 are arranged between the limiting part 25 and the inner wall 24, and the limiting part 25 abuts against the balls 20, the driving assembly pushes or moves away from the plurality of balls 20 to move the plurality of balls 20 between the limiting part 25 and the inner wall 24.

[0114] In the present example, the limiting part 25 limits the movement of the balls 20 in the direction close to the limiting part 25, the balls 20 are clamped between the limiting part 25 and the inner wall 24, the balls 20 are limited to move between the limiting part 25 and the inner wall 24, and the driving assembly is used to drive the balls 20 to gather and abut against the recess of the lock shaft 10, or the driving assembly is separated from the balls 20 and makes the balls 20 move away from the recess of the lock shaft 10.

[0115] Preferably, the side of the limiting part 25 close to the balls 20 is provided with a plurality of slideways 26, the plurality of slideways 26 correspond to the plurality of balls 20 one by one, and the balls 20 are arranged in the slideways 26 and move in the slideways 26.

[0116] In particular, as shown in Figure 3 The slideways 26 extend in the radial direction of the limiting part 25, and the slideways 26 have circular arc bottom surfaces matched with the balls 20.

[0117] In the present example, the slideways 26 limit the movement of the balls 20 in a predetermined direction, i.e. in the direction close to or away from the lock shaft 10, which avoids the collision between adjacent balls 20 and plays a role in stabilizing the balls 20.

[0118] Preferably, the limiting portion 25 extends in the direction of the ball 20 to form a first flange portion 27 for blocking the ball 20 from escaping from the limiting portion 25. Also, the inner wall 24 extends in the direction of the ball 20 to form a second flange portion 28 for blocking the ball 20 from escaping from the inner wall 24.

[0119] In this example, when the lock shaft 10 is not inserted into the accommodating cavity 22, the balls 20 are easy to escape from the slide 26 when gathering to the limit position. The first flange portion 27 is used to abut against the upper side of the ball 20, thereby playing a role of limiting the ball 20 from escaping from the slide 26 when gathering to the limit position. In addition, when the balls 20 gather to the limit position, the balls 20 abut against the second flange portion 28, and the second flange portion 28 also plays a role of limiting the balls 20 from escaping from the slide 26 when gathering to the limit position.

[0120] Specifically, as shown in FIG. 2, the first flange portion 27 is located on the upper surface of the slide 26 and at the edge inside the slide 26, and protrudes from the upper surface of the slide 26 to block the balls 20 from gathering inward. The second flange portion 28 is arranged on the inner wall 24 of the accommodating cavity 22 and is located on the path of the balls 20 gathering inward, and cooperates with the first flange portion 27. When the balls 20 gather inward to the limit position, the balls 20 touch the first flange portion 27 and the second flange portion 28, thereby avoiding the balls 20 from further gathering inward to escape from the slide 26. Figure 4

[0121] In some embodiments, only the limiting portion 25 has the first flange portion 27.

[0122] In other embodiments, only the inner wall 24 has the second flange portion 28.

[0123] Preferably, the driving assembly includes a driving member 29 provided with an abutting surface matched with the outer circumferential side of the balls 20, and the driving member 29 slides in the accommodating cavity 22 to push the balls 20 to gather to the locking position.

[0124] In this example, the driving member 29 slides in the accommodating cavity 22 to make the abutting surface abut against the outer circumferential side of the balls 20. With the movement of the driving member 29, the abutting surface pushes the balls 20 to gather simultaneously. The driving member 29 moves reversely, the abutting surface moves away from the balls 20, and the balls 20 move away from the lock shaft 10. This arrangement can use one driving member 29 to drive the balls 20 simultaneously, and the structure is simple and not easy to be damaged.

[0125] Preferably, the abutting surface is an inclined surface 30 surrounding the outer side of the balls 20 in the circumferential direction, so as to limit the balls 20 from opening outward.

[0126] ​In the present example, the inclined surface 30 is specifically a concave conical surface, the concave part of the conical surface abuts the surface of the ball 20, and the inclined surface 30 converts the up-down movement of the driving member 29 into the in-out movement of the ball 20 in the horizontal direction.

[0127] It should be noted that the inclined surface 30 is not limited to the conical surface described above, and can also be a concave circular arc surface, which can also achieve the corresponding effect.

[0128] As shown in Figure 3 , in the specific implementation, the limiting part 25 is a cylinder with a circular groove in the middle, the upper end surface of the cylinder is provided with a slide 26, the side surface of the cylinder is provided with a plurality of longitudinally extending protrusions 51, and a first longitudinal slide groove 50 is formed between the adjacent two protrusions 51.

[0129] The driving member 29 is a cylinder, a plurality of longitudinal grooves 55 are formed in the side wall of the cylinder, and the side wall of the cylinder is longitudinally divided by the longitudinal grooves 55 to form a plurality of circular arc sliding plates 54.

[0130] The limiting part 25 cooperates with the driving member 29 to enable the cylinder to slide up and down in the inner cavity 53 of the cylinder, and the circular arc sliding plate 54 can slide up and down in the first slide groove 50.

[0131] The top end of the circular arc sliding plate 54 has an inclined surface 30 for abutting the ball 20, and the circular arc sliding plate 54 slides in the first slide groove 50 to adjust the height of the top end of the circular arc sliding plate 54 protruding from the top end of the cylinder, thereby controlling the up-down movement of the inclined surface 30, and further adjusting the in-out movement distance of the ball 20.

[0132] The outer side surface of the protrusion 51 has a second longitudinal slide groove 52, and the inner wall 24 of the accommodating cavity 22 has a longitudinal protrusion cooperating with the second slide groove 52 to limit the up-down sliding of the protrusion 51 and the limiting part 25 in the accommodating cavity 22.

[0133] Preferably, the driving assembly further comprises a first elastic member 31, the limiting part 25 is in sliding connection with the inner wall 24 of the accommodating cavity 22, and the two ends of the first elastic member 31 abut against the limiting part 25 and the driving member 29 respectively, and the first elastic member 31 applies a force to the limiting part 25 and the driving member 29 to move away from each other.

[0134] In the present example, the first elastic member 31 pushes the limiting part 25 to provide a spring force for the limiting part 25 to abut against the ball 20, so that the limiting part 25 continuously clamps the ball 20 with the inner wall 24.

[0135] Specifically, as shown in Figure 3 , the first elastic member 31 is a spring, an annular groove is formed on the bottom surface of the inner cavity 53 of the driving member 29, the spring is installed in the annular groove, and the other end of the spring abuts against the bottom surface of the limiting part 25.

[0136] Preferably, the driving assembly comprises a nut member 33 and a screw member 34, the nut member 33 is fixedly arranged on the lock base 19, and the screw member 34 is threadedly connected to the nut member 33 and moves relative to the nut member 33 to realize the approach or departure of the screw member 34 to the plurality of balls 20.

[0137] In the present example, as shown in Figure 3 , the nut member 33 has a threaded hole 45 in the middle, the screw member 34 cooperates with the threaded hole 45, the nut member 33 has a plurality of mounting holes, and the bolts 42 pass through the mounting holes to mount the nut member 33 to the bottom surface of the lock base 19. The bottom of the screw member 34 protrudes from the threaded hole 45, and the bottom has a tooth portion 48, which facilitates the tool to cooperate with the tooth portion 48 to drive the screw member 34 to rotate.

[0138] The screw member 34 rotates relative to the nut member 33, the screw member 34 abuts against the driving member 29 and drives the driving member 29 to drive the balls 20 to gather, the screw member 34 provides driving force for the movement of the plurality of balls 20, the rotation of the screw member 34 is converted into linear movement through the threaded cooperation of the screw member 34 and the nut member, the stability of the movement of the screw member 34 is high, the threaded cooperation amplifies the stroke of the movement of the driving member 29, and the movement of the driving member 29 is convenient for accurate adjustment.

[0139] Preferably, the expanding-ball quick-change locking mechanism 18 further comprises at least one limiting component 35, the limiting component 35 is connected to the nut member 33 and moves on the nut member 33 to realize that when the plurality of balls 20 gather to lock the lock shaft 10, the limiting component 35 is connected to the screw member 34 to limit the movement of the screw member 34.

[0140] In the present example, as shown in Figure 3 and Figure 4 , the number of limiting components 35 is four, the limiting component 35 can be connected to the screw member 34 to limit the movement of the screw member 34, and the specific connection mode includes but is not limited to clamping and abutting, when the plurality of balls 20 gather and lock the lock shaft 10, the sudden loosening of the balls 20 is avoided, thereby improving the reliability of the locking and the safety of the device.

[0141] Preferably, the expanding-ball quick-change locking mechanism 18 further comprises a second elastic member 32, the second elastic member 32 is arranged in the driving assembly, and one end of the second elastic member 32 abuts against the limiting component 35 to make the limiting component 35 return to the initial state, in the initial state, the limiting component 35 locks the movement of the screw member 34.

[0142] In the present example, the second elastic member 32 makes the limiting component 35 lock the screw member 34 in the default state, so that the balls 20 are always limited in the default state, thereby continuously avoiding the sudden loosening of the balls 20 and improving the safety of the device.

[0143] In practice, as shown in Figure 4 the second elastic member 32 is a spring, the bottom of the driving member 29 has an opening 23 downward spring groove 43, the spring is arranged in the spring groove 43, the lower end of the spring abuts the upper side of the limiting member 35.

[0144] Preferably, the screw member 34 includes a limiting disc 39 and a screw rod 40, the end of the screw rod 40 is connected to the limiting disc 39, the screw rod 40 is threadedly connected to the nut member 33, the limiting member 35 is connected to the limiting disc 39 to lock the limiting disc 39, or the limiting member 35 is separated from the limiting disc 39 to unlock the limiting disc 39.

[0145] In this example, the limiting member 35 controls the rotation of the screw rod 40 by limiting the limiting disc 39, because the diameter of the limiting disc 39 is larger than the diameter of the screw rod 40, thereby reducing the load on the limiting member 35, and reducing the risk of damage to the limiting member 35.

[0146] Preferably, the outer edge of the limiting disc 39 is provided with a plurality of limiting grooves 41, and the limiting member 35 is inserted into the limiting grooves 41 to lock the rotation of the limiting disc 39.

[0147] Specifically, as shown in Figure 3 the outer edge of the limiting disc 39 is provided with a plurality of limiting grooves 41, and the limiting member 35 is inserted into the limiting grooves 41 to lock the rotation of the limiting disc 39.

[0148] In other embodiments of the present application, the limiting grooves 41 are a plurality of circular holes distributed circumferentially on the limiting disc 39.

[0149] In this example, because the limiting disc 39 is provided with limiting grooves 41, the part of the limiting member 35 in contact with the limiting disc 39 is at the outer edge of the limiting disc 39, which can maximize the diameter of the screw rod 40, thereby maximizing the load on the limiting member 35.

[0150] Preferably, the limiting member 35 includes a limiting portion 36 and a guide portion 37, the limiting portion 36 is connected to the end of the guide portion 37, and the limiting portion 36 extends outwardly along the radial direction of the guide portion 37, so that the outer diameter of the limiting portion 36 is greater than the outer diameter of the guide portion 37, and the guide hole 38 is formed on the nut member 33, the guide portion 37 passes through the guide hole 38 and moves in the guide hole 38, so that the limiting portion 36 is clamped in the limiting groove 41 of the limiting disc 39, or the limiting portion 36 is separated from the limiting groove 41 of the limiting disc 39.

[0151] The guide hole 38 limits the movement direction of the guide portion 37, the limiting portion 36 is used to clamp the limiting groove 41 of the limiting disc 39, and the limiting portion 36 bears the main load.

[0152] Specifically, the guide portion 37 is a long rod, and the limiting portion 36 is a cylindrical head connected to the end of the long rod, and the diameter of the cylindrical head is larger than the diameter of the long rod.

[0153] like Figure 3 As shown, the limiting portion 36 , the first elastic member 31 , the driving member 29 and the embedded body 44 are sequentially arranged in the accommodating cavity 22 from top to bottom, and the nut member 33 blocks the opening 23 at the bottom of the accommodating cavity 22 .

[0154] The inlay 44 has a hollow groove 49 in the middle for the screw member 34 to pass through. The inlay 44 has a through hole. The guide portion 37 passes through the through hole from top to bottom and enters the guide hole 38. The limiting portion 36 is stuck on the surface on the upper side of the through hole. The inlay 44 is used to limit the downward movement of the limiting component 35 to prevent the limiting component 35 from moving downward and disengaging from the limiting groove 41, thereby losing control of the screw member 34.

[0155] This embodiment has two states, namely, a locked state and an unlocked state. Specifically,

[0156] Figure 5 The display shows the locked state of the device:

[0157] First, the lock shaft 10 is inserted downwardly into the receiving cavity 22 of the lock base 19 through the opening 23 .

[0158] Next, an external force pushes the limiting component 35 , and the guide portion 37 moves upward in the guide hole 38 , and the limiting portion 36 moves upward away from the limiting groove 41 of the screw member 34 , so that the screw member 34 can rotate freely.

[0159] Again, the screw member 34 rotates relative to the nut member 33 and pushes the driving member 29 to move in the direction close to the ball 20. The driving member 29 abuts against the four balls 20 through the inclined surface 30 and gathers them toward the center, so that the balls 20 abut against the concave surface 21 of the lock shaft 10, restricting the lock shaft 10 in the accommodating cavity 22, thereby playing a locking role.

[0160] Finally, the external force on the limiting component 35 is removed, and under the push of the second elastic component 32, the limiting component 35 moves downward to the initial position, and the limiting portion 36 clamps the limiting groove 41 downward, thereby limiting the rotation of the screw member 34, maintaining the position of the driving member 29 and limiting the movement of the ball 20 to the surroundings, thereby maintaining the lock shaft 10 locked in the accommodating cavity 22, and reaching a locked state.

[0161] Figure 6 The device is shown in the unlocked state:

[0162] First, an external force pushes the limiting component 35 , causing the guide portion 37 to move upward in the guide hole 38 and drive the limiting portion 36 to move upward and out of the limiting groove 41 .

[0163] Secondly, the reverse rotation screw member 34 moves downward and away from the driving member 29, and the driving member 29 slides up and down in the accommodating groove without limitation.

[0164] Finally, the lock shaft 10 moves in the direction of disengaging from the accommodating cavity 22, as shown in the figure. Figure 6 The lock shaft 10 moves upward, the concave surface 21 of the lock shaft 10 pushes the ball 20 to move around, the ball 20 abuts against the inclined surface 30 and drives the driving member 29 to move downward, until the ball 20 completely disengages from the concave surface 21 of the lock shaft 10, the ball 20 loses the limitation to the lock shaft 10, the lock shaft 10 completely disengages from the accommodating cavity 22, and the unlocking process is completed.

[0165] Embodiment two

[0166] Figure 7 An embodiment of the lock shaft 10 is shown.

[0167] In this embodiment, the lock shaft 10 includes a mounting base 11, an elastic member 13 connected to the mounting base 11, and a lock shaft 10 body, one end of which is connected to the elastic member 13, and the other end of which is used for locking in a plurality of balls 20.

[0168] The lock shaft 10 body is floatingly connected to the mounting base 11 through the elastic member 13, and the lock shaft 10 has a certain damping effect when the lock shaft 10 is locked in the ball type quick change locking mechanism 18.

[0169] Preferably, the lock shaft 10 body includes a floating plate 15 and a lock rod 16 connected to each other, and the mounting base 11 is provided with a movable cavity 12, specifically, the movable cavity 12 is a circular groove, a through groove 47 is formed at the bottom of the circular groove, the floating plate 15 is arranged in the circular groove, and the lock rod 16 passes through the through groove 47, a cover plate 46 covers the opening 23 on the upper side of the circular groove, and the floating plate 15 is sealed in the circular groove, an annular movable gap 17 is formed between the side edge of the floating plate 15 and the inner wall 24 of the circular groove, the elastic member 13 is filled in the annular movable gap 17, and the other end of the lock rod 16 is used for locking in the plurality of balls 20.

[0170] In this example, the elastic member 13 is filled in the annular gap, so that the outer periphery of the floating plate 15 is subjected to uniform elastic force, and the floating plate 15 can rebound to the center position after forced movement, having a certain self-centering ability.

[0171] Preferably, the outer periphery of the lock shaft 10 body is provided with a concave surface 21 for cooperating with the ball 20.

[0172] In this embodiment, the ball 20 cooperates with the concave surface 21 of the lock shaft 10 body, thereby limiting the lock shaft 10 body in the accommodating cavity 22. Since the concave surface 21 is provided, the ball 20 is less likely to be separated from the side surface of the lock shaft 10 body, so that the lock shaft 10 body can be stably locked in the ball-expanding quick-change locking mechanism 18.

[0173] Embodiment three

[0174] A battery pack comprising the ball-expanding quick-change locking mechanism 18.

[0175] The battery pack of this embodiment comprises a battery pack body, and the four side edges of the battery pack body are provided with the lock shaft 10 or the lock base 19, so as to facilitate the installation of the side edges of the battery pack body in the designated position.

[0176] In other embodiments, the upper surface of the battery pack body is provided with the lock shaft 10 or the lock base 19, so as to facilitate the installation of the upper surface of the battery pack body in the designated position.

[0177] The battery pack body is provided with the lock shaft 10 or the lock base 19, so that the battery pack body can be quickly and conveniently locked or unlocked in the set position.

[0178] Embodiment four

[0179] An electric vehicle comprising the ball-expanding quick-change locking mechanism 18.

[0180] In this embodiment, the battery assembly can be quickly and conveniently locked or unlocked in the electric vehicle through the ball-expanding quick-change locking mechanism 18.

[0181] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and such changes and modifications all fall within the protection scope of the present application.

Claims

1. A bead expansion quick change locking mechanism for a battery pack, characterized by: The rising bead quick-change locking mechanism comprises a lock base, a plurality of rolling beads and a driving assembly. The rolling beads are arranged in the lock base and can move in the lock base. The driving assembly pushes the rolling beads to make the rolling beads close to each other to abut against the concave part on the side of the lock shaft to lock the lock shaft or to move away from the rolling beads to make the rolling beads move away from the concave part to unlock the lock shaft. The rising bead quick-change locking mechanism further comprises a guide mechanism. The driving assembly pushes or moves away from the rolling beads to make the rolling beads move to the locking position or the unlocking position in the guide mechanism to lock or unlock the lock shaft. The guide mechanism comprises a containing cavity. The containing cavity is provided with an opening. The edge of the opening extends inwardly to form an inner wall of the containing cavity. The rolling beads are arranged in the containing cavity and abut against the inner wall. The guide mechanism further comprises a limiting part. The limiting part is arranged in the containing cavity. The rolling beads are arranged between the limiting part and the inner wall and abut against the limiting part. The driving assembly pushes or moves away from the rolling beads to make the rolling beads move between the limiting part and the inner wall. The driving assembly comprises a driving member. The driving member is provided with an abutting surface matched with the outer circumferential side of the rolling beads. The driving member slides in the containing cavity to push the rolling beads to close to each other to the locking position. The driving assembly further comprises a first elastic member. The limiting part and the inner wall of the containing cavity are in sliding connection. The two ends of the first elastic member abut against the limiting part and the driving member respectively. The first elastic member applies a force to the limiting part and the driving member to move away from each other. The driving assembly comprises a nut member and a screw member. The screw member comprises a limiting disc and a screw. The end of the screw is connected with the limiting disc. The screw is threadedly connected with the nut member. The rising bead quick-change locking mechanism further comprises at least one limiting part. The limiting disc is provided with a plurality of limiting grooves. The limiting part is inserted into the limiting groove to lock the rotation of the limiting disc.

2. The bead-and-bell quick change locking mechanism for a battery pack of claim 1, wherein: The side of the limiting part close to the rolling beads is provided with a plurality of sliding channels. The sliding channels correspond to the rolling beads one by one. The rolling beads are arranged in the sliding channels and move in the sliding channels.

3. The bead-and-bell quick change locking mechanism for a battery pack of claim 1, wherein: The limiting part extends in the direction of the rolling beads to form a first flange part. The first flange part is used to block the rolling beads from moving away from the limiting part. The inner wall extends in the direction of the rolling beads to form a second flange part. The second flange part is used to block the rolling beads from moving away from the inner wall.

4. The bead-and-bell quick change locking mechanism for a battery pack of claim 1, wherein: The abutting surface is an inclined surface surrounding the outer side of the rolling beads to limit the rolling beads from opening outwardly.

5. The bead-and-bell quick change locking mechanism for a battery pack of claim 1, wherein: The nut member is fixedly arranged in the lock base. The screw member is threadedly connected with the nut member and moves relative to the nut member to make the screw member close to or move away from the rolling beads.

6. The bead-and-bell quick change locking mechanism for a battery pack of claim 5, wherein: The limiting part is connected with the nut member and moves on the nut member to make the limiting part connected with the screw member to limit the movement of the screw member when the rolling beads close to each other to lock the lock shaft.

7. The bead-and-bell quick change locking mechanism for a battery pack of claim 6, wherein: The elastic member is arranged in the driving assembly, and one end of the elastic member abuts against the limiting component to restore the limiting component to the initial state. In the initial state, the limiting component locks the movement of the screw rod.

8. The bead-and-bell quick change locking mechanism for a battery pack of claim 6, wherein: The limiting component is connected to the limiting disc to lock the limiting disc, or the limiting component is disconnected from the limiting disc to unlock the limiting disc.

9. The bead-and-bell quick change locking mechanism for a battery pack of claim 8, wherein: The limiting component comprises a limiting part and a guide part, the limiting part is connected to the end of the guide part, and the limiting part extends radially outward along the guide part, so that the outer diameter of the limiting part is greater than the outer diameter of the guide part, the nut member is provided with a guide hole, the guide part passes through the guide hole and moves in the guide hole, so that the limiting part is clamped in the limiting groove of the limiting disc, or the limiting part is disconnected from the limiting groove of the limiting disc.

10. A locking device, characterized by: The battery pack comprises a battery pack body, and the four peripheral sides of the battery pack body are provided with the lock shaft or the lock base.

11. The locking device of claim 10, wherein: Alternatively, the upper surface of the battery pack body is provided with the lock shaft or the lock base.

12. The locking device of claim 11, wherein: The battery pack comprises a battery pack body, and the four peripheral sides of the battery pack body are provided with the lock shaft or the lock base.

13. The locking device according to claim 11, wherein: Alternatively, the upper surface of the battery pack body is provided with the lock shaft or the lock base.

14. A battery pack, characterized by ​ 15. The battery pack of claim 14, wherein: ​ ​ 16. An electric vehicle, characterized by ​

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