Unlocking linkage, battery pack assembly and electric vehicle

Abstract

The application provides an unlocking linkage device, a battery pack assembly and an electric vehicle. The unlocking linkage device is used for unlocking a locking mechanism on the electric vehicle and comprises an unlocking rod which is installed on the battery pack, the top end of the unlocking rod can be extended from an outlet of the battery pack and is used for unlocking the locking mechanism on the electric vehicle, and the top end of the unlocking rod is provided with a rolling piece. The unlocking linkage device of the application is arranged on the battery pack, the unlocking mechanism directly acts on the unlocking linkage device to drive the unlocking of the locking mechanism on the battery pack and the electric vehicle, the alignment accuracy is high, and the unlocking efficiency can be improved. Meanwhile, the rolling piece can improve the smoothness of the movement of the unlocking rod and the locking mechanism when they are matched, and the abrasion of the unlocking rod and the locking mechanism is reduced.

Description

Technical Field

[0001] This invention relates to an unlocking linkage device, a battery pack assembly, and an electric vehicle. Background Technology

[0002] The battery installation methods for existing electric vehicles are generally divided into fixed installation and swappable installation. Fixed installation batteries are generally fixed to the vehicle; while swappable installation batteries are generally installed in a movable manner, and the battery can be removed at any time for replacement or charging. After replacement or charging is completed, it is then installed back onto the vehicle body.

[0003] For swappable batteries, in existing technologies, the unlocking mechanism on the battery swapping equipment needs to pass through the battery pack to unlock the locking mechanism on the electric vehicle. This results in poor alignment accuracy and low unlocking efficiency. Furthermore, the unlocking process involves significant impact between the locking and unlocking mechanisms, and repeated operation can easily cause wear and tear. Damage to both the locking and unlocking mechanisms affects the safety of the battery pack. Summary of the Invention

[0004] The technical problem to be solved by the present invention is how to securely lock the battery to the vehicle while improving the alignment accuracy of the unlocking mechanism and the locking mechanism and reducing wear, thereby providing an unlocking linkage device, a battery pack assembly and an electric vehicle.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] An unlocking linkage device for unlocking a locking mechanism on an electric vehicle includes an unlocking rod, which is mounted on a battery pack. The top end of the unlocking rod can extend from an outlet of the battery pack to unlock the locking mechanism on the electric vehicle. The top end of the unlocking rod is provided with a rolling element.

[0007] In this technical solution, the unlocking linkage device is installed on the battery pack. The unlocking mechanism directly acts on the unlocking linkage device to unlock the battery pack and the locking mechanism on the electric vehicle. This ensures high alignment accuracy and improves unlocking efficiency. Simultaneously, the rolling element improves the smoothness of movement when the unlocking lever and locking mechanism cooperate, reducing wear on both.

[0008] Preferably, the rolling element is directly disposed at the end of the unlocking lever, or the rolling element is mounted on the end of the unlocking lever via a mounting portion, the rolling element being confined to the end of the unlocking lever or the mounting portion, and rolling relative to the unlocking lever or the mounting portion.

[0009] In this technical solution, the rolling element can be easily disassembled and replaced via the mounting part.

[0010] Preferably, a receiving groove is provided on the top end of the unlocking rod or the top end of the mounting part, and the rolling element is accommodated in the receiving groove and rolls in the receiving groove.

[0011] In this technical solution, the receiving groove can limit the movement of the rolling element, and the receiving groove at the top can make the rolling element and the locking mechanism more fully contacted.

[0012] Preferably, the depth of the receiving groove is greater than half the maximum diameter of the rolling element and less than the maximum diameter of the rolling element.

[0013] In this technical solution, the depth of the receiving groove is such that the rolling element is higher than the receiving groove, so that it can always maintain contact with the locking mechanism. At the same time, the depth of the rolling element in the receiving groove is sufficient to prevent the rolling element from easily coming out of the receiving groove.

[0014] Preferably, the opening diameter of the receiving groove is smaller than the maximum diameter of the rolling element, or a limiting element is provided at the opening of the receiving groove.

[0015] In this technical solution, by adjusting the opening diameter of the receiving groove or by setting a limiting component, the rolling element can be completely prevented from detaching from the receiving groove. Using a limiting component further facilitates the disassembly of the rolling element for replacement and maintenance.

[0016] Preferably, the mounting part and the unlocking rod are connected by a threaded connection or by a fastener.

[0017] In this technical solution, the mounting part connected by threaded connection or fastener can be more easily disassembled and replaced.

[0018] Preferably, the mounting part is provided with a through connection hole, the fastener passes through the through connection hole and is connected and fixed to the top end of the unlocking rod, and the through connection hole is provided on the outer periphery of the receiving groove.

[0019] In this technical solution, the connection method using fasteners and connecting through holes avoids the accommodating groove and rolling elements when fixing the mounting part. Furthermore, the tightening direction of the fasteners intersects with the disengagement direction of the rolling elements, resulting in a secure connection.

[0020] Preferably, one of the unlocking rod and the mounting part is provided with an inwardly recessed portion, and the other is provided with an outwardly protruding portion, wherein the protruding portion is embedded in the recessed portion.

[0021] In this technical solution, the protrusions and recesses facilitate the positioning of the mounting part and the unlocking rod, ensuring that the relative positions of the mounting part and the unlocking rod do not shift, and also facilitating the alignment of the mounting part and the unlocking rod during installation.

[0022] Preferably, the recessed portion and the protruding portion are connected by fasteners.

[0023] In this technical solution, the relative movement of the recessed part and the raised part can be avoided by fixing the recessed part and the raised part, thus completely fixing the recessed part and the raised part.

[0024] Preferably, the recessed portion and the protruding portion are provided with threaded portions, and the protruding portion and the recessed portion are threadedly connected through the threaded portions.

[0025] In this technical solution, the relative movement of the recessed and raised portions can be avoided by the threaded fixing of the recessed and raised portions, thus completely fixing them. Furthermore, no other fixing structures are required; installation and disassembly can be achieved simply by rotating the raised and recessed portions.

[0026] Preferably, the mounting part is further provided with a disassembly through hole and a receiving groove for accommodating the rolling element. The disassembly through hole is located on the outer periphery of the receiving groove and is used to cooperate with the disassembly device to disassemble the mounting part.

[0027] In this technical solution, the disassembly device can enter the disassembly through hole to rotate the mounting part, thereby disassembling the mounting part and the unlocking rod.

[0028] Preferably, one end of the mounting portion is provided with a receiving groove for accommodating the rolling element, and the other end is provided with the protrusion, wherein the radial dimension of the mounting portion is larger than that of the protrusion.

[0029] In this technical solution, the radial portion of the mounting part being larger than that of the protrusion can serve a limiting function. The receiving groove and the protrusion can be machined together, simplifying the structure.

[0030] Preferably, the protrusion has guide surfaces at both ends, the guide surface away from the mounting portion is used for mounting guidance of the recess, and the guide surface near the mounting portion is used to mate with the top edge of the recess.

[0031] In this technical solution, the guide surface away from the mounting part can guide the process of entering the recess and correct deviations during entry. The guide surface closer to the mounting part can tolerate machining deviations, and can be used for adaptation when the top edge of the recess is not highly precise.

[0032] Preferably, the unlocking lever is mounted to the battery pack via a mounting member and is elastically connected to the mounting member.

[0033] In this technical solution, the elastically connected unlocking rod can reduce impact, avoid excessive impact on the locking mechanism during unlocking, and improve service life.

[0034] Preferably, the unlocking linkage device includes a first elastic part, which is sleeved on the unlocking rod and used to apply a force to the unlocking rod so that the unlocking rod is reset relative to the battery pack.

[0035] In this technical solution, the first elastic part is used to apply force to the unlocking rod so that the unlocking rod is reset relative to the battery pack and can absorb the impact. At the same time, the first elastic part, which is set in a sleeve manner, can reduce the use of space and make the structure more compact.

[0036] Preferably, in the initial state, the bottom end of the unlocking lever abuts against a limiting plate on the battery pack, the limiting plate being installed at the bottom of the mounting component.

[0037] In this technical solution, a limiting plate is used to limit the unlocking rod to prevent it from falling off.

[0038] Preferably, the mounting component is provided with a guide structure, and the unlocking rod moves along the guide structure.

[0039] In this technical solution, the guide structure can guide the movement direction of the unlocking rod, avoiding the unlocking rod from deviating during movement and colliding with the outlet.

[0040] Preferably, the guide structure is a sleeve, and the unlocking rod passes through the guide structure and slides along the guide structure.

[0041] In this technical solution, the interior of the sleeve-shaped guide structure can guide the sliding of the unlocking rod.

[0042] Preferably, the guide structure is made of brass. Brass has a self-lubricating property, which allows for smoother sliding contact with the unlocking lever.

[0043] Preferably, the mounting component includes a mounting housing, the top of the mounting housing is provided with a limiting structure, the top of the mounting housing is provided with a first opening, the limiting structure is provided with a second opening, and the diameter of the second opening is smaller than that of the first opening.

[0044] In this technical solution, the first opening is used to accommodate the guide structure, while the second opening is used to limit the guide structure to prevent it from detaching from the mounting housing.

[0045] Preferably, the two ends of the guide structure abut against the first elastic part and the limiting structure, respectively.

[0046] In this technical solution, the rebound force generated by the first elastic part is balanced by the resisting force of the limiting structure, so that the guide structure is stably kept in the mounting shell and will not slide randomly during the movement of the unlocking rod.

[0047] Preferably, the mounting housing and the guide structure are concentrically arranged.

[0048] In this technical solution, the concentrically arranged mounting shell and guide structure make installation and fixation easier.

[0049] Preferably, the bottom end of the unlocking rod is provided with a limiting part, and the two ends of the first elastic part abut against the limiting part and the guide structure respectively.

[0050] In this technical solution, the first elastic part is restricted by the limiting part and the guiding structure, making full use of the guiding structure and simplifying the internal structure.

[0051] Preferably, the unlocking lever includes a first segment and a second segment, the second segment being connected to the first segment, the first segment being closer to the outlet side, the second segment being connected to the limiting portion, and the first elastic portion being sleeved on the second segment.

[0052] In this technical solution, the first segment is used to extend out of the outlet, and the second segment can limit the first elastic part and guide the compression and stretching direction of the first elastic part.

[0053] Preferably, the radial dimension of the second segment is greater than that of the first segment, the radial dimension of the first segment is smaller than that of the outlet and is used to extend from the outlet, and the radial dimension of the second segment is greater than that of the outlet.

[0054] In this technical solution, the size of the first segment matches and extends from the outlet of the battery pack, while the size of the second segment ensures that the entire unlocking lever is prevented from being pushed out of the outlet, thus limiting the upward movement of the unlocking lever and improving the overall strength of the unlocking lever.

[0055] Preferably, the guide structure has a guide space inside and is adapted to the shape of the second segment, which slides within the guide space.

[0056] In this technical solution, the guide space with the adapted shape can guide the second segment to slide.

[0057] Preferably, the mounting component includes a mounting base connected to the mounting housing, and the mounting base has a fixing surface for connection with the battery pack.

[0058] In this technical solution, the housing can be installed as a whole using the mounting base, and the connection between the mounting base and the battery pack does not affect the installation of the housing.

[0059] A battery pack assembly includes a battery pack and an unlocking linkage device, wherein the unlocking linkage device passes through the battery pack in a vertical direction.

[0060] An electric vehicle includes a locking mechanism and a battery pack assembly. The locking mechanism is disposed on the electric vehicle and is used to lock in conjunction with a locking element on the battery pack. An unlocking linkage device is used to unlock the locking mechanism and the locking element.

[0061] Preferably, the locking mechanism includes a locking link and a plurality of locking bases. The locking bases have locking grooves, and at least a portion of the locking bases have locking tongues. The locking tongues are movably installed in the locking grooves and can prevent the locking shaft from disengaging from the locking grooves. The locking link is movably connected to the locking bases through the locking tongues. The bottom of the locking link has an unlocking surface extending along the length of the locking link. Under the action of an external force, the unlocking rod abuts against the unlocking surface to lift the locking link and maintain the lifted state. During the lifting process, the top end of the unlocking rod slides horizontally along the unlocking surface.

[0062] In this technical solution, the unlocking surface extends along the length of the locking rod, which allows the unlocking rod to abut against the unlocking surface during its movement relative to the locking rod, thus improving the stability of unlocking.

[0063] Preferably, a buffer structure is provided at the unlocking surface, and the unlocking rod acts on the buffer structure.

[0064] In this technical solution, a buffer structure is positioned at the unlocking surface. The unlocking rod directly applies force to the buffer structure, reducing the impact of the unlocking rod on the locking link, extending the service life of the locking link, and reducing wear caused by collisions and friction between the unlocking rod and the locking link. The positive advantages of this invention are: the unlocking linkage device is located on the battery pack, and the unlocking mechanism directly acts on the unlocking linkage device to unlock the battery pack and the locking mechanism on the electric vehicle. This results in high alignment accuracy and improved unlocking efficiency. Simultaneously, the rolling element improves the smoothness of movement when the unlocking rod and the locking mechanism cooperate, reducing wear on both. Attached Figure Description

[0065] Figure 1 This is a schematic diagram of an electric vehicle according to a preferred embodiment of the present invention.

[0066] Figure 2 This is a schematic diagram of the battery pack assembly, quick-change bracket, and locking mechanism according to a preferred embodiment of the present invention.

[0067] Figure 3 This is a three-dimensional structural diagram of a battery pack assembly according to a preferred embodiment of the present invention.

[0068] Figure 4 This is a partially enlarged structural diagram of the battery pack assembly according to a preferred embodiment of the present invention.

[0069] Figure 5 This is a schematic diagram of the extended state of the unlocking linkage device according to a preferred embodiment of the present invention.

[0070] Figure 6 This is a schematic diagram of the retracted state of the unlocking linkage device according to a preferred embodiment of the present invention.

[0071] Figure 7 This is a schematic diagram of the internal structure of the battery pack according to a preferred embodiment of the present invention.

[0072] Figure 8 This is a three-dimensional structural diagram of the unlocking linkage device according to a preferred embodiment of the present invention.

[0073] Figure 9 This is an exploded view of the unlocking linkage device according to a preferred embodiment of the present invention.

[0074] Figure 10 This is a cross-sectional schematic diagram of the unlocking linkage device according to a preferred embodiment of the present invention.

[0075] Figure 11 This is a three-dimensional structural diagram of the unlocking rod according to a preferred embodiment of the present invention.

[0076] Figure 12 This is a schematic diagram of the mounting section according to a preferred embodiment of the present invention.

[0077] Figure 13 This is a schematic diagram of the top structure of the unlocking lever according to another embodiment of the present invention.

[0078] Figure 14 This is a schematic diagram of the unlocking and locking states of the locking mechanism according to a preferred embodiment of the present invention.

[0079] Figure 15 This is a schematic diagram of the unlocking process of the locking mechanism according to a preferred embodiment of the present invention. Detailed Implementation

[0080] The present invention will be described more clearly and completely below with reference to a preferred embodiment and the accompanying drawings.

[0081] like Figures 1-13 As shown, this embodiment discloses an electric vehicle, including commercial vehicles such as heavy trucks and light trucks. The electric vehicle includes a locking mechanism 300, which is mounted on the main beam of the electric vehicle via a quick-change bracket 500, or the locking mechanism is directly mounted on the main beam of the electric vehicle. Wherein, as... Figures 1-4As shown, this embodiment of an electric vehicle may include a quick-change bracket 500, a locking mechanism 300, and a battery pack assembly. The battery pack assembly may include a battery pack 400 and an unlocking linkage device 100, which passes vertically from bottom to top through the battery pack 400. The locking mechanism 300 is disposed on the quick-change bracket 500 and is used to engage with a locking member 210 on the battery pack 400 for locking. The unlocking linkage device 100 is used to unlock the locking mechanism 300 and the locking member 210. In this embodiment, the locking member 210 is a locking shaft.

[0082] like Figures 2-5 As shown, this embodiment discloses an unlocking linkage device 100 for unlocking a locking mechanism 300 on an electric vehicle. It includes an unlocking rod 110, which is mounted on a battery pack 400. The top end of the unlocking rod 110 extends from an outlet 220 of the battery pack 400 to unlock the locking mechanism 300 on the electric vehicle. A rolling element 130 is provided at the top end of the unlocking rod 110. The unlocking linkage device 100 is mounted on the battery pack 400. An external unlocking mechanism directly acts on the unlocking linkage device 100 to unlock the battery pack 400 and the locking mechanism 300 on the electric vehicle. This provides high alignment accuracy and improves unlocking efficiency. Simultaneously, the rolling element 130 improves the smoothness of movement when the unlocking rod 110 and the locking mechanism 300 cooperate, reducing wear on both. In the initial state, the top of the unlocking lever 110 extends out of the outlet 220 of the battery pack 400, thereby shortening the distance between the unlocking lever 110 and the locking mechanism 300, reducing the unlocking stroke, improving unlocking efficiency, and also improving unlocking reliability.

[0083] like Figures 5-10 As shown, the rolling element 130 is mounted on the end of the unlocking lever 110 via a mounting portion 120. The rolling element 130 is confined on the mounting portion 120 and rolls relative to the mounting portion 120. The rolling element 130 can be easily disassembled and replaced via the mounting portion 120. This embodiment demonstrates the mounting method using the mounting portion 120. In practice, the rolling element 130 can also be directly mounted on the end of the unlocking lever 110, or the rolling element 130 can be confined on the unlocking lever 110 using other known methods.

[0084] like Figures 5-12 As shown, a receiving groove 121 is provided on the top of the mounting part 120, and the rolling element 130 is received in the receiving groove 121 and rolls within the receiving groove 121. Figure 12As shown, in this embodiment, the receiving groove 121 is disposed at the upper end of the mounting portion 120. In other embodiments, the receiving groove 121 may also be located on the unlocking lever 110 in the same manner. The receiving groove 121 can limit the movement of the rolling element 130, and the receiving groove 121 located at the top end can make the contact between the rolling element 130 and the locking mechanism 300 more sufficient.

[0085] like Figure 12 As shown, the depth of the receiving groove 121 is greater than half the maximum diameter of the rolling element 130 but less than the maximum diameter of the rolling element 130. The depth of the receiving groove 121 is such that a portion of the rolling element 130 protrudes above the receiving groove 121, thus maintaining constant contact with the locking mechanism 300. Simultaneously, the depth of the rolling element 130 within the receiving groove 121 is sufficient to prevent it from easily dislodging from the receiving groove 121. In other embodiments, the depth of the receiving groove 121 may be less than half the maximum diameter of the rolling element 130, and the rolling element 130 may be restrained by other auxiliary limiting structures, such as a cover applied to the mounting portion 120 and the rolling element 130.

[0086] like Figure 12 As shown, the opening diameter of the receiving groove 121 is smaller than the maximum diameter of the rolling element 130. By controlling the opening diameter of the receiving groove 121, the rolling element 130 can be completely prevented from detaching from the receiving groove 121. In other embodiments, a limiting member is provided at the opening of the receiving groove 121 to confine the rolling element 130 within the receiving groove 121. Using a limiting member further facilitates the disassembly of the rolling element 130 for replacement and maintenance.

[0087] like Figures 5-7 As shown, the unlocking lever 110 is mounted to the battery pack 400 via the mounting member 140 and is elastically connected to the mounting member 140. The elastically connected unlocking lever 110 reduces impact, preventing excessive impact on the locking mechanism 300 during unlocking and improving its service life. The elastic connection can be achieved using known elastic structures or various known structures that allow contraction and expansion through media such as liquids or gases, such as cylinders. While the elastic connection reduces impact, in other embodiments, the unlocking lever 110 and the mounting member 140 can also be connected in a non-elastic manner, such as a rigid connection.

[0088] like Figures 5-7As shown, in a preferred embodiment, the unlocking linkage device 100 includes a first elastic portion 160, which is sleeved on the unlocking rod 110. The first elastic portion 160 applies a downward force to the unlocking rod 110 to reset it relative to the battery pack 400. Additionally, the first elastic portion 160 absorbs impact, preventing excessive impact on the locking mechanism 300 during unlocking and improving its service life. The sleeved arrangement of the first elastic portion 160 also reduces space utilization, making the structure more compact. The unlocking rod 110 also guides and limits the first elastic portion 160, preventing it from dislodging. In this embodiment, the first elastic portion 160 is preferably a spring, but it can also be a torsion spring, a disc spring, or other known elastic structural components.

[0089] like Figures 5-7 As shown, especially as Figure 6 As shown, in the initial state, the bottom end of the unlocking lever 110 abuts against the limiting plate 150 on the battery pack 400, and the limiting plate 150 is installed at the bottom of the mounting component 140. The limiting plate 150 limits the unlocking lever 110 to prevent it from falling. In other embodiments, other limiting structures can also be used to limit the downward movement of the unlocking lever 110. In this embodiment, it is further preferred to provide a limiting through hole 151 on the limiting plate 150. The edges on both sides of the limiting through hole 151 are smaller than the bottom of the unlocking lever 110, thereby locking the unlocking lever 110 so that it does not fall. At the same time, the limiting through hole 151 allows the unlocking mechanism to pass through to lift the unlocking lever 110.

[0090] like Figure 9 and Figure 10 As shown, in a preferred embodiment, a guide structure 170 is provided within the mounting component 140, and the unlocking rod 110 moves along the guide structure 170. The guide structure 170 can guide the movement direction of the unlocking rod 110, preventing the unlocking rod 110 from deviating during movement and colliding with the outlet 220. In other embodiments, the guide structure 170 may not be provided if the alignment of the unlocking rod 110 can be ensured to be relatively accurate.

[0091] like Figure 9 and Figure 10 As shown, the guide structure 170 is a sleeve, and the unlocking rod 110 passes through the guide structure 170 and slides along the guide structure 170. The interior of the sleeve-shaped guide structure 170 can guide the sliding of the unlocking rod 110. In other embodiments, the guide structure 170 is not limited to the form of a sleeve, and can also be other known guide structures such as slide rails or grooves.

[0092] like Figure 9 and Figure 10As shown, in a preferred embodiment, the guide structure 170 is made of brass. Brass has a self-lubricating effect, which allows for smoother sliding contact with the unlocking lever 110. In other embodiments, the guide structure 170 can also be made of other self-lubricating materials, such as graphite, or lubricated by known lubrication methods such as applying lubricating oil to the inside of the guide structure 170. Of course, the unlocking lever 110 itself can also be made of a self-lubricating material.

[0093] like Figure 9 and Figure 10 As shown, the guide structure 170 has a guide space inside and is adapted to the shape of the unlocking lever 110, which slides within the guide space. The guide space with the adapted shape can guide the unlocking lever 110 to slide.

[0094] like Figure 8 and Figure 9 As shown, in a preferred embodiment, the mounting component 140 includes a mounting housing 141, a limiting structure 143 on the top of the mounting housing 141, a first opening 145 on the top of the mounting housing 141, and a second opening 144 on the limiting structure 143, the diameter of the second opening 144 being smaller than that of the first opening 145. Figure 10 As shown, the first opening 145 is used to accommodate the guide structure 170, while the second opening 144 serves to limit and prevent the guide structure 170 from detaching from the mounting housing. In this embodiment, the limiting structure 143 is preferably a perforated plate structure; in other embodiments, it can also be any other structure that can prevent the guide structure 170 from detaching upwards.

[0095] like Figures 8-10 As shown, the two ends of the guide structure 170 abut against the first elastic part 160 and the limiting structure 143, respectively. The rebound force generated by the first elastic part 160 is balanced by the resisting force of the limiting structure 143, so that the guide structure 170 is stably held within the mounting housing 141 and will not slide randomly during the movement of the unlocking rod 110.

[0096] like Figure 8 and Figure 10 As shown, in a preferred embodiment, the mounting housing 141 and the guide structure 170 are concentrically arranged. The concentric arrangement of the mounting housing 141 and the guide structure 170 facilitates installation and fixation.

[0097] like Figures 7-9As shown, the mounting component 140 also includes a mounting base 142, which is connected to and surrounds one side of the mounting housing 141. The side wall of the mounting base 142 has a fixing surface for connecting to the battery pack 400. The mounting housing 141 can be installed as a whole by means of the mounting base 142, and the connection between the mounting base 142 and the battery pack 400 does not affect the mounting housing 141.

[0098] like Figures 5-6 , Figures 10-11 As shown, the bottom end of the unlocking lever 110 is provided with a limiting part 113, and the two ends of the first elastic part 160 abut against the limiting part 113 and the guide structure 170, respectively. The limiting part 113 and the guide structure 170 jointly restrict the first elastic part 160, making full use of the guide structure 170 and simplifying the internal structure. In this embodiment, the limiting part 113 is preferably larger in radial dimension than other parts of the unlocking lever 110, thereby limiting the first elastic part 160. In other embodiments, the limiting part can also be a pin or other known limiting mechanism.

[0099] like Figures 9-11 As shown, in a preferred embodiment, the unlocking lever 110 includes a first segment 111 and a second segment 112. The second segment 112 is connected to the first segment 111. The first segment 111 is located near the outlet 220. The second segment 112 is connected to the limiting part 113. The first elastic part 160 is sleeved on the second segment 112, and the second segment 112 slides within the guide structure 170. The first segment 111 extends out of the outlet 220, and the second segment 112 can limit the first elastic part 160, guiding the compression and stretching directions of the first elastic part 160. In other embodiments, the first elastic part 160 may not be limited by the second segment 112; for example, a pin or other protruding structural member may be used to limit the first elastic part 160.

[0100] like Figures 9-11 As shown, in a further preferred embodiment, the radial dimension of the second segment 112 is larger than that of the first segment 111, the radial dimension of the first segment 111 is smaller than that of the outlet 220 and is used to extend from the outlet 220, and the radial dimension of the second segment 112 is larger than that of the outlet 220. The size of the first segment 111 matches and extends from the outlet 220 of the battery pack 400, and the size of the second segment 112 ensures that the entire unlocking lever 110 is prevented from being pushed out of the outlet 220, thus limiting the upward movement of the unlocking lever 110 and improving the overall strength of the unlocking lever 110. In other embodiments, upward limiting may not be achieved through the second segment 112; for example, a pin or other protruding structural member may be used to limit the upward movement of the second segment 112 away from the outlet 220.

[0101] The mounting part 120 and the unlocking lever 110 are connected by a thread or by a fastener. The mounting part 120, connected by a thread or a fastener, can be more easily removed and replaced. In this embodiment, Figure 12 The mounting portion 120 shown is connected to the unlocking lever 110 via its own threads. In another embodiment, Figure 13 The mounting part 120 shown is fixed to the unlocking lever 110 by fastener 180.

[0102] like Figure 13 As shown, the mounting part 120 is provided with a through-hole. The fastener 180 passes through the through-hole and is connected and fixed to the top of the unlocking rod 110. The through-hole is located on the outer periphery of the receiving groove 121. The mounting part 120 can be fixed by the fastener 180 and the connecting hole, avoiding the receiving groove 121 and the rolling element 130. Furthermore, the tightening direction of the fastener intersects with the disengagement direction of the rolling element 130, resulting in a secure connection.

[0103] like Figure 12 and Figure 13 As shown, in a preferred embodiment, one of the unlocking lever 110 and the mounting portion 120 is provided with an inwardly recessed portion 114, and the other is provided with an outwardly protruding portion 122, with the protruding portion 122 embedded in the recessed portion 114. The protruding portion 122 and the recessed portion 114 facilitate the positioning of the mounting portion 120 and the unlocking lever 110, ensuring that their relative positions do not shift, and also facilitating alignment during installation. In this embodiment, the recessed portion 114 is provided on the unlocking lever 110, and the protruding portion 122 is provided on the mounting portion 120; in other embodiments, their positions can be interchanged.

[0104] The protrusion 122 and the recess 114 can be further secured using different mounting methods. For example, Figure 12 In the preferred embodiment shown, the recessed portion 114 and the protrusion 122 are provided with threaded portions, and the protrusion 122 and the recessed portion 114 are threadedly connected by the threaded portions on the outer periphery of the protrusion and the inner periphery of the recessed portion 114. The threaded fixation of the recessed portion 114 and the protrusion 122 prevents relative movement between them, thus completely fixing the recessed portion 114 and the protrusion 122. Furthermore, no other fixing structure is required; installation and disassembly can be achieved simply by rotating the protrusion 122 and the recessed portion 114.

[0105] Among them, such as Figure 13In the preferred embodiment shown, the recess 114 and the protrusion 122 are connected by a fastener 180. By fixing the recess 114 and the protrusion 122, relative movement between the recess 114 and the protrusion 122 can be avoided, and the recess 114 and the protrusion 122 can be completely fixed.

[0106] In other embodiments, the protrusion 122 and the recess 114 can also be connected using other fixing methods. For example, they can be bonded together by applying adhesive to the recess 114 and the protrusion 122, or they can be connected together by welding after being inserted together, and so on, among other known methods.

[0107] like Figure 12 As shown, in a preferred embodiment, one end of the mounting portion 120 is provided with a receiving groove 121 for accommodating the rolling element 130, and the other end is provided with a protrusion 122. The radial dimension of the mounting portion 120 is larger than that of the protrusion 122. The portion of the mounting portion 120 with a radial dimension larger than that of the protrusion 122 can serve as a limiting function. The receiving groove 121 and the protrusion 122 can be machined together, simplifying the structure.

[0108] like Figure 12 As shown, in a preferred embodiment, the protrusion 122 has guide surfaces 124 at both ends. The guide surface 124 away from the mounting portion 120 is used for mounting guidance of the recess 114, and the guide surface near the mounting portion 120 is used to mate with the top edge of the recess 114. The guide surface 124 away from the mounting portion 120 can guide the recess 114 during entry and correct deviations when entering the recess 114. The guide surface 124 near the mounting portion 120 can tolerate machining deviations, and can be used for adaptation when the top edge of the recess 114 is not highly precise.

[0109] like Figure 12 As shown, in a preferred embodiment, the mounting portion 120 is further provided with a disassembly through hole 123. The disassembly through hole 123 is located on the outer periphery of the receiving groove 121 and is used to cooperate with the disassembly device to disassemble the mounting portion 120. Thus, the disassembly device can enter the disassembly through hole 123 to rotate the mounting portion 120, thereby disassembling the mounting portion 120 and the unlocking rod 110.

[0110] like Figure 14 and Figure 15 As shown, Figure 14 and Figure 15 The images above all show the locked state. Figure 14 and Figure 15The figures below show the unlocked state. The locking mechanism 300 of the battery pack assembly in this embodiment includes a locking link 320 and several locking bases 310. The locking bases 310 have locking grooves 340, and at least a portion of the locking bases 310 have locking tongues 330. The locking tongues 330 are movably installed in the locking grooves 340 and can prevent the locking member 210 from disengaging from the locking grooves 340. The locking link 320 is movably connected to the locking bases 310 through the locking tongues 330. The bottom of the locking link 320 has an unlocking surface extending along the length of the locking link 320. Under the action of external force, the unlocking rod 110 abuts against the unlocking surface and lifts the locking link 320, thereby driving the locking tongues 330 to open the locking grooves 340. During the lifting process, the top end of the unlocking rod 110 slides horizontally along the unlocking surface and abuts against the unlocking surface. Specifically, both ends of the latch 330 are hinged to the lock base 310 and the locking link 320. During the lifting of the locking link 320, the latch 330 rotates, opening the space of the locking groove, allowing the locking member 210 to move horizontally to the right. Simultaneously, the lock base 310 remains fixed; therefore, the movement trajectory of the locking link is not a linear translation, but rather an upward movement with... Figure 14 and Figure 15 The movement is horizontal to the right. During this process, the unlocking lever 110 only moves upward, thus its position in the horizontal direction relative to the locking lever 320 also changes.

[0111] As the locking member 210 moves horizontally to the right within the locking groove 340, the unlocking lever 110 continuously abuts against the unlocking surface, keeping the locking tongue 330 in the open state. This ensures that the locking member 210 can smoothly move out of the locking groove 340, improving the reliability of unlocking.

[0112] like Figure 15 As shown, the locking linkage 320 includes an unlocking block 321 extending towards the lock base 310. The bottom of the unlocking block 321 has a horizontally extending unlocking surface, and the unlocking rod 110 acts on the unlocking surface of the unlocking block 321. The horizontally extending unlocking surface allows the unlocking rod 110 to abut against the unlocking block 321 during movement relative to the locking linkage 320, preventing it from getting stuck in any position and improving unlocking stability. The horizontal unlocking surface provides greater tolerance; even if the unlocking rod 110 is misaligned or has a torsional angle, it can always remain within the unlocking surface.

[0113] In other embodiments, the unlocking surface may also be configured as a concave square, a concave arc, a concave triangle, or a concave rhombus, extending along the length of the locking rod 320. A concave square unlocking surface can restrict the unlocking rod 110, preventing it from detaching during unlocking. A concave arc, triangle, or rhombus unlocking surface can form an optimal unlocking line with the unlocking rod 110 and allow for appropriate misalignment, enabling the unlocking rod 110 to move within the unlocking surface along the length of the locking rod 320 and facilitating the stopping of the unlocking device.

[0114] In a further preferred embodiment, the unlocking surface of the unlocking block 321 is provided with a buffer structure, such as an elastic component like a rubber pad, and the unlocking rod 110 acts on the buffer structure. By placing the buffer structure at the unlocking surface, the unlocking rod 110 will directly exert force on the buffer structure. The buffer structure reduces the impact of the unlocking rod 110 on the locking rod 320, extends the service life of the locking rod 320, and reduces wear caused by collisions and friction between the unlocking rod 110 and the locking rod 320.

[0115] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection 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 principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. An unlock linkage for unlocking a locking mechanism on an electric vehicle, characterized by, The device includes an unlocking lever mounted on a battery pack. The top end of the unlocking lever extends from an outlet of the battery pack to unlock a locking mechanism on the electric vehicle. A rolling element is provided at the top end of the unlocking lever. The rolling element is either directly disposed at the end of the unlocking lever or mounted on the end of the unlocking lever via a mounting portion. The rolling element is confined to the end of the unlocking lever or the mounting portion and rolls relative to the unlocking lever or the mounting portion.

2. The unlocking linkage of claim 1, wherein, A receiving groove is provided on the top of the unlocking rod or the top of the mounting part, and the rolling element is accommodated in the receiving groove and rolls in the receiving groove.

3. The unlocking linkage of claim 2, wherein, The depth of the receiving groove is greater than half the maximum diameter of the rolling element and less than the maximum diameter of the rolling element.

4. The unlocking linkage of claim 2, wherein, The opening diameter of the receiving groove is smaller than the maximum diameter of the rolling element, or a limiting element is provided at the opening of the receiving groove.

5. The unlocking linkage of claim 2, wherein, The mounting part and the unlocking rod are connected by a thread or by a fastener.

6. The unlocking linkage of claim 5, wherein, The mounting part is provided with a through hole, the fastener passes through the through hole and is connected and fixed to the top of the unlocking rod, and the through hole is located on the outer periphery of the receiving groove.

7. The unlocking linkage of claim 5, wherein, One of the unlocking rod and the mounting part is provided with an inwardly recessed part, and the other is provided with an outwardly protruding part. The protruding part is embedded in the recessed part, and the recessed part and the protruding part are connected by a fastener. Alternatively, the recessed part and the protruding part are provided with threaded parts, and the protruding part and the recessed part are threadedly connected by the threaded parts.

8. The unlocking linkage of claim 7, wherein, The mounting part is also provided with a disassembly through hole and a receiving groove for accommodating the rolling element. The disassembly through hole is located on the outer periphery of the receiving groove and is used to cooperate with the disassembly device to disassemble the mounting part.

9. The unlocking linkage of claim 1, wherein, The unlocking linkage device includes a first elastic part, which is sleeved on the unlocking rod and used to apply a force to the unlocking rod so that the unlocking rod is reset relative to the battery pack.

10. The unlocking linkage of claim 9, wherein, The unlocking lever is mounted to the battery pack via a mounting bracket. In the initial state, the bottom end of the unlocking lever abuts against a limiting plate on the battery pack, and the limiting plate is mounted at the bottom of the mounting bracket.

11. The unlocking linkage of claim 10, wherein, The mounting component has a guide structure inside, and the unlocking rod passes through the guide structure and the mounting component and slides along the guide structure.

12. The unlocking linkage of claim 11, wherein, The mounting component has a limiting structure at its top, a first opening at its top, and a second opening at its limiting structure. The diameter of the second opening is smaller than that of the first opening. The two ends of the guide structure abut against the first elastic part and the limiting structure, respectively.

13. The unlocking linkage of claim 12, wherein, The bottom end of the unlocking rod is provided with a limiting part, and the two ends of the first elastic part abut against the limiting part and the guide structure respectively.

14. The unlocking linkage of claim 13, wherein, The unlocking lever includes a first segment and a second segment, the second segment being connected to the first segment, the first segment being closer to the outlet side, the second segment being connected to the limiting part, and the first elastic part being sleeved on the second segment.

15. The unlocking linkage of claim 14, wherein, The radial dimension of the second segment is greater than that of the first segment, the radial dimension of the first segment is smaller than that of the outlet and is used to extend from the outlet, and the radial dimension of the second segment is greater than that of the outlet.

16. A battery pack assembly, comprising: It includes a battery pack and an unlocking linkage device as described in any one of claims 1-15, wherein the unlocking linkage device passes through the battery pack in a vertical direction.

17. An electric vehicle characterized by comprising: The device includes a locking mechanism and a battery pack assembly as described in claim 16, wherein the locking mechanism is disposed on the electric vehicle and is used to engage with a locking element on the battery pack for locking, and the unlocking linkage device is used to unlock the locking mechanism and the locking element.

18. The electric vehicle of claim 17, wherein, The locking mechanism includes a locking link and several locking bases. Each locking base has a locking groove, and at least a portion of the locking base has a locking tongue. The locking tongue is movably installed in the locking groove and can prevent the locking element from disengaging from the locking groove. The locking link is movably connected to the locking base through the locking tongue. The bottom of the locking link has an unlocking surface extending along the length of the locking link. Under the action of external force, the unlocking rod abuts against the unlocking surface to lift the locking link and maintain the lifted state. During the lifting process, the top end of the unlocking rod slides horizontally along the unlocking surface.

19. The electric vehicle of claim 18, wherein, The unlocking surface is provided with a buffer structure, and the unlocking rod acts on the buffer structure.

Images