Axial double-buckle locking mechanism

Abstract

The present invention belongs to the field of vehicle-mounted battery installation equipment, and in particular, relates to an axial double-clip locking mechanism, which includes a lock tongue hingedly mounted in a frame; one side of the lock tongue is abutted by an elastic member so that the lock tongue is reset, and also includes a trigger member, which overcomes the elastic force of the elastic member by pressing the side of the lock tongue, so that one end of the lock tongue rotates, and the other end of the lock tongue rotates to unlock by means of a lever cooperation formed by the hinge of the lock tongue and the frame; the lock tongue is at least a pair, and is symmetrically arranged, and the unlocking action is triggered by the same trigger member. The technical solution of the present invention utilizes the lever principle to achieve Z-direction locking of the vehicle power assembly and the vehicle end, and uses a symmetrical interlocking solution to solve the problem of easy unlocking of the locking mechanism group during acceleration and deceleration, so that the X-direction shaking of the vehicle power assembly will not cause uncontrolled unlocking with the vehicle end.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle-mounted battery installation equipment, and specifically relates to an axial double-buckle locking mechanism. Background Art

[0002] Electric cars are gradually becoming the mainstream of the automobile market. The automobile battery replacement industry, which was born to solve the range anxiety, is developing rapidly.

[0003] For example, the battery replacement technology previously adopted by the applicant, the main feature of this equipment is to install a number of shaft locks on the chassis frame, an L-shaped locking track is formed in the lock body of the shaft lock, and a lock tongue controlled by an elastic member is installed on the locking track. When the vehicle-mounted power supply assembly uses the shaft structure on its side to slide into the L-shaped locking track, the lock tongue is triggered to lock the shaft structure along the direction of vehicle travel (X direction), thereby achieving the purpose of locking the vehicle-mounted power supply assembly along the X direction. Since the L-shaped locking track itself has the function of limiting the height of the vehicle in the height direction (Z direction), the purpose of fixing the vehicle-mounted power supply assembly in three dimensions is comprehensively achieved (along the width direction of the vehicle, that is, the Y direction has been limited by the chassis frame).

[0004] However, the above locking scheme is aimed at electric cars with horizontal plug-in interfaces, so it is necessary to reserve a travel along the X direction for the vehicle power assembly so that the male part of the plug-in connector of the vehicle power assembly can be plugged into the female part of the plug-in connector of the vehicle chassis frame along the X direction.

[0005] In another part of mainstream car models, vertical plug-in interfaces are more commonly used, that is, the male part of the plug-in connector of the vehicle's power assembly needs to be plugged into the female part of the plug-in connector on the vehicle end along the Z direction. For example, NIO mainly uses this battery replacement solution.

[0006] In the relevant technical solutions, a screw rotation tightening method is used to achieve the connection and tightening between the vehicle power assembly and the vehicle end. However, this type of technology has the following defects: (1) Each time the battery is replaced, a loosening and locking action is required, and the thread and the thread hole need to bear a certain load, so the thread and the thread hole are greatly damaged, that is, the service life of the screw tightening equipment will be significantly affected; (2) The threaded connection method has high requirements for the Z-direction concentricity of the lock core, and the overall battery replacement equipment, especially the vehicle-side equipment, is difficult to ensure the processing and assembly accuracy, which will inevitably lead to high equipment processing costs and high equipment maintenance costs, that is, high battery replacement costs; (3) The vehicle driving environment has a great impact on the safety of the use of the vehicle power assembly and the plug-in stability. On roads with poor driving environments, for example, the vehicle power assembly is prone to loosening after the vehicle is vibrated during driving. Summary of the invention

[0007] In view of the problem in the above prior art that the Z-direction lock in the form of a bolt is not tightly locked, the equipment wear is obvious and the equipment has a short service life, the purpose of the present invention is to provide a Z-direction lock in the form of a hook, and adopt a double lock symmetrical matching method to achieve a firm connection between the vehicle power assembly and the vehicle end, so as to avoid the acceleration and deceleration of the vehicle affecting the locking state.

[0008] An axial double-clip locking mechanism includes a lock tongue hingedly mounted in a frame; one side of the lock tongue is abutted by an elastic member so that the lock tongue is reset. The lock tongue is driven to lock and unlock by a trigger member. The trigger member overcomes the elastic force of the elastic member by pressing the side of the lock tongue, causing one end of the lock tongue to rotate, and the other end of the lock tongue is rotated to unlock by lever cooperation formed by the hinge between the lock tongue and the frame.

[0009] The upper end of the lock tongue is hook-shaped and bends along the direction of vehicle travel, and the lock structure on the vehicle end that cooperates with the lock tongue is also hook-shaped along the direction of vehicle travel, that is, the hooking direction of the two is the direction of vehicle travel. However, due to the limitation of the hook lock size, the matching size of the two hook locks cannot be set too long. When the vehicle accelerates or decelerates, the matching between the vehicle-end lock hook and the lock structure on the upper end of the lock tongue is affected by the inertia of the equipment, causing the two to separate from each other or be over-pressed. In particular, when the X-direction swing clearance of the on-board power supply assembly basically exceeds the matching size of the two hook locks, the aforementioned two hook-shaped locking mechanisms will separate from each other, thereby causing the connection between the vehicle end and the on-board power supply assembly to be disconnected, resulting in the vehicle power failure and stalling, and even a serious vehicle disintegration accident during driving. In order to solve the above technical problems, the lock tongues in this embodiment are at least a pair, and are symmetrically arranged, and the unlocking action is triggered by the same trigger member.

[0010] The beneficial effects of adopting this technical solution are: the use of a simple hook-shaped locking structure can effectively improve the locking success rate, and the requirements for equipment processing and assembly precision are lower, the fault tolerance rate is high, and the battery replacement can be achieved with low equipment use and maintenance costs, which is very beneficial to the market players' development of related markets and the popularization of battery replacement technology. On the basis of this Z-direction hook-shaped locking scheme, the symmetrically arranged locking structures can form interlocking, overcoming the natural disadvantages of the hook-shaped locking scheme, especially in this embodiment, the same trigger is used to synchronously and symmetrically control the pair of lock tongues, which conveniently and reliably realizes the coordinated locking of the lock tongue group, and there will be no problem that one lock tongue in the lock tongue group is locked and the other lock tongue is not yet locked.

[0011] As a preferred embodiment, the triggering member is a cam. The far point and near point of the cam can be used to form a driving trigger unlocking of the lock tongue by using the lift and to form a reset of the lock tongue under the tension of the elastic member by using the return stroke. When resetting the lock, the lock tongue is in a normally locked state.

[0012] The elastic member is a first compression spring. When in use, the trigger member abuts against a side of the lock tongue away from the elastic member, so that the two lock tongues rotate symmetrically and differently.

[0013] As a preferred embodiment, the peripheral side surface of the trigger member is an inclined curved surface, and during the process of the trigger member tilting the lock tongue against the top, the contact between the trigger member and the lock tongue is always a line contact. In other words, when the lock tongue changes from a vertical normally locked state to an inclined unlocked state, the peripheral side surface of the trigger member always maintains a line contact with the side surface of the lock tongue with its changing curved surface shape, avoiding point contact pressure loss on the surface of the lock tongue and the trigger member, and avoiding serious damage to the smoothness of the action of the trigger mechanism.

[0014] As a preferred embodiment, a protruding first position lock is provided on the side wall of the lock tongue. A protruding second position lock is provided on the side wall of the trigger member. When the first position lock cooperates with the second position lock, the trigger member drives the lock tongue to be located in an unlocked or locked position. In this technical solution, the rotation node of the trigger member is mechanically hard-limited by the first position lock and the second position lock. Under the protection of the mechanical hard limit, the control accuracy requirements of the electrical control system including the motor can be effectively reduced, thereby reducing the cost of equipment use and the complexity of control.

[0015] As a preferred embodiment, more specifically, the bottom surface of the trigger member radially extends to form a chassis. The second position lock is located between the upper end surface of the chassis and the inclined surface, and does not exceed the peripheral side surface of the chassis. This technical solution has two beneficial effects: first, the second position lock is sandwiched between the chassis and the inclined surface, which effectively improves the mechanical impact resistance of the second position lock, can reduce the damage rate of the second position lock, and extend its service life; second, during the machining process, the chassis is used as the reference surface, and the second position lock and the inclined surface on the chassis are processed, which reduces the number of changes in the processing reference surface and is conducive to improving the machining accuracy; compared with the technical solution in which the second position lock protrudes radially from the peripheral side surface of the trigger member and protrudes from the chassis or even no chassis is set, the second position lock and the residual material on the inclined surface are cut and milled under the condition that the chassis is the reference surface, which compresses the size of the blank mold as much as possible, reduces the workload of residual material cutting, thereby realizing a scientific and reasonable structural design and saving costs.

[0016] The triggering member is an elliptical cam. The elliptical shape is a centrally symmetrical structure with symmetrical far points and near points, which can better meet the synchronous and symmetrical unlocking and locking actions of a pair of lock tongues.

[0017] There are four second position locks, which are symmetrically distributed at the four end positions of the trigger. Two pairs of position locks are set at the four end points, which can form two sets of trigger control mechanisms within a 360° ring angle, that is, two unlocking and locking controls are achieved when the trigger is driven to rotate one circle. This fully utilizes the control characteristics of the elliptical structure on a pair of lock tongues located in the same row in this technical solution, improving the mechanical use efficiency and control efficiency.

[0018] The midpoints of the lock limit cooperation of the first position lock and the second position lock are respectively located on the longitudinal and transverse midlines of the trigger. In other words, the first position lock is offset relative to the midline of the lock tongue, and the second position lock is also offset relative to the longitudinal and transverse midlines of the elliptical trigger, but the offset directions of the first position lock and the corresponding second position lock are opposite. The design of this technical solution enables the second position lock to avoid the corresponding midline, preventing the second position lock from blocking the far end of the trigger from rotating to the extreme position to fully push the lock tongue to unlock, and preventing the second position lock from being fully reset to the normally locked position.

[0019] As a preferred embodiment, the side of the second position lock close to the rotational forward direction cooperates with the first position lock in the form of an inclined surface to avoid the first position lock and the second position lock being completely locked. Since the elliptical triggering member is used to realize the triggering action on both sides within 360°, the first position lock and the second position lock cannot be completely locked, so that the triggering member can be continuously rotated in one direction to realize continuous unlocking and locking triggering. In this embodiment, the first position lock and the second position lock are matched with an inclined surface, which realizes the generation of an unlocking threshold between the first position lock and the second position lock, and the unlocking threshold is not too high.

[0020] As a preferred embodiment, a bolt hole is provided in the center of the bottom end surface of the trigger member to cooperate with an external unlocking bolt to realize the rotation locking and unlocking of the trigger member. In this embodiment, more specifically, the frame is a rectangular frame, and a through hole is provided on each side of the long side of the frame. The two locking tongues pass through the corresponding through holes respectively, and the lower end of the locking tongue is cooperated with the elastic member and the trigger member to realize swinging and resetting around the hinge pivot; the upper end of the locking tongue is provided with a locking hook extending away from each other to hook and lock the external vehicle end, so that the locking mechanism assembly is reliably fixed to the electric car.

[0021] An expanded hole is provided on the lower end surface of the frame. The setting of the expanded hole provides sufficient space for the setting of the elastic member and the lock tongue on the one hand; on the other hand, it reduces the weight of the equipment, that is, it is conducive to lightweighting of the vehicle. Specifically, the expanded hole is connected to the through hole. The elastic member is installed in the expanded hole, one end is inserted and fixed by a positioning bolt that passes through the frame, and the other end is clamped in the clamping groove of the lock tongue. An important reason why the expanded hole must be provided in this embodiment is that if the installation space of the elastic member is too small and the size of the elastic member is short, it cannot provide sufficient elastic deformation buffer for the rotation of the lock tongue, and it cannot fully relieve the deformation pressure of the elastic member, which can easily cause the elastic member to collapse sideways due to the rotational torque of the lock tongue.

[0022] As a preferred embodiment, a cavity is provided in the center of the frame, and the cavity is connected to the outside through three arranged hole structures, wherein two of the three hole structures on both sides are positioning holes. A rod is inserted into the cavity through the hole structure in the middle at the center of the upper end of the trigger member; the end of the rod is connected to the end piece, and two positioning columns are protruding from the end piece, which are used to respectively correspond to the positioning holes for positioning, so that the trigger member is in a far-point working state. If the far-point positioning mechanism provided by the present technical solution is missing, it is difficult to ensure that the trigger member is stably in the far-point position. Once the trigger member is rotated and retracted by the pressure of the elastic member, the lock tongue cannot remain in the unlocked state.

[0023] As a preferred embodiment, a second compression spring is provided between the rod and the side wall of the cavity or / and between the end surface of the cavity close to the trigger member and the trigger member. The second compression spring forms an elastic force on the rod to move the rod toward the positioning hole, so that the positioning column and the positioning hole can maintain the inserted state.

[0024] As a preferred implementation scheme, the telescopic stroke of the rod is greater than the insertion stroke of the positioning column, ensuring that the positioning column can be completely disengaged from the positioning hole when the trigger member is pressed and moves toward one side of the frame.

[0025] It will be apparent that elements or features described above in the context of a single embodiment may be used alone or in combination in other embodiments.

[0026] Beneficial effects of the present invention:

[0027] (1) The technical solution of the present invention uses the lever principle to achieve Z-axis locking of the on-board power supply assembly and the vehicle end, and uses a symmetrical interlocking solution to solve the problem of easy unlocking of the locking mechanism group during acceleration and deceleration. In this way, the X-axis shaking of the on-board power supply assembly will not cause uncontrolled unlocking from the vehicle end.

[0028] (2) A pair of lock tongues are interlocked synchronously by a trigger, which has good control stability. The ingenious mechanical structure is used to replace the complex motor coordination and synchronization control scheme, which makes the control cost lower.

[0029] (3) In order to solve the problem that the elliptical trigger is difficult to maintain its posture at the far end, the technical solution provides a positioning column and positioning hole matching mechanism for horizontal plane locking, which makes up for the above-mentioned defects of the elliptical mechanism. On the other hand, such a setting can also realize the integration of the trigger and the frame and other structures, that is, it is not necessary to set the trigger at the end of the battery swap station, but to integrate it with the on-board power assembly end. In this way, it is only necessary to set a hexagonal bolt head or other mechanism to drive the trigger to rotate on the station-end battery swap platform, which further reduces the complexity of the station-end battery swap platform equipment and transfers the risk of equipment damage to the replaceable on-board power assembly end, which is conducive to avoiding the impact of station-end equipment damage on all battery swap processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In the drawings, the sizes and proportions do not represent the sizes and proportions of actual products. The drawings are merely illustrative, and some non-essential elements or features are omitted for clarity.

[0031] Figure 1 is a first-view stereogram of Example 1;

[0032] Figure 2 is a second viewing angle stereogram of Example 1;

[0033] Figure 3 is a three-dimensional assembly schematic diagram of Example 1;

[0034] Figure 4 is a front view of the locked state of embodiment 1;

[0035] Figure 5 It is a front view of the locking process of Example 1;

[0036] Figure 6 is a front view of the unlocked state of Embodiment 1;

[0037] Figure 7 is a schematic diagram of the cooperation between the lock tongue and the trigger member of Example 1;

[0038] Figure 8 It is a stereogram of the lock tongue;

[0039] Fig. 9 is a three-dimensional diagram of the trigger member of Example 1;

[0040] Fig.10 is a top view of the trigger member of Example 1;

[0041] Fig.11 is a front view of the locked state of embodiment 2;

[0042] Fig.12 yes Fig.11 Enlarged view of middle C;

[0043] Fig.13 It is a three-dimensional perspective view of the locked state of Example 2.

[0044] Description of Reference Numerals

[0045] 1. Framework;

[0046] 101, through hole; 102, expanded hole; 103, positioning bolt; 104, first compression spring; 105, cavity;

[0047] 2. Lock tongue;

[0048] 201, card slot; 202, tongue end lock hook; 203, notch; 204, first position lock;

[0049] 3. Trigger;

[0050] 301, second position lock; 302, chassis; 303, inclined surface; 304, rod; 305, end piece; 306, positioning column;

[0051] 4. Car end lock hook;

[0052] 5. Second compression spring;

[0053] 6. Hexagon socket bolt hole;

[0054] A. Far point;

[0055] B. Nearer point. DETAILED DESCRIPTION

[0056] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. What is described here is only a preferred embodiment of the present invention, and those skilled in the art can think of other ways to implement the present invention based on the preferred embodiment, and other ways also fall within the scope of the present invention.

[0057] Example 1

[0058] like Figure 1-Figure 10 As shown, an axial double-buckle locking mechanism comprises a rectangular frame 1. A through hole 101 is vertically penetrated on both sides of the frame 1 along the length direction, and two locking tongues 2 are vertically inserted into the corresponding through holes 101, and a horizontal hinge pivot penetrates the middle of the corresponding locking tongue 2, so that the locking tongue 2 rotates around the width direction of the frame 1.

[0059] The lower end surface of the frame 1 is provided with an expanded hole 102. The size of the expanded hole 102 is larger than that of the through hole 101, and is connected to the through hole 101 on the corresponding side. A positioning bolt 103 is respectively provided on the two end surfaces of the frame 1 along the length direction, and the positioning bolt 103 passes through the side wall of the frame 1 by screwing, and then extends into the expanded hole 102. A first compression spring 104 is horizontally arranged in the expanded hole 102, one end of the first compression spring 104 is tightly sleeved on the corresponding positioning bolt 103, and the other end is inserted into the slot 201 reserved on the surface of the lock tongue 2. When the lock tongue 2 is driven to compress the first compression spring 104 and rotate, although the first compression spring 104 is subjected to the torque of the lock tongue 2, since both ends of the first compression spring 104 are locked, there will be no side collapse, thereby ensuring the elastic support stability and safety of the lock tongue 2.

[0060] The setting of the expanded hole 102 provides sufficient space for the setting of the elastic member such as the first compression spring 104 and the lock tongue 2, and also reduces the weight of the equipment, that is, it is conducive to the lightweight of the vehicle. The important reason why the expanded hole 102 must be set in this embodiment is that if the installation space of the elastic member is too small, resulting in a short size of the elastic member, the first compression spring 104 cannot provide enough elastic deformation buffer for the rotation of the lock tongue 2, and cannot fully disperse and relieve the deformation pressure of the elastic member, that is, the rotation of the lock tongue 2 will produce a larger bending angle on the short-sized first compression spring 104, which is very likely to cause the elastic member to collapse sideways due to the rotation torque of the lock tongue 2.

[0061] One side of the lock tongue 2 is abutted by an elastic member (a first compression spring in this embodiment) so that the lock tongue 2 is reset, and the other side of the lock tongue 2 is driven by the trigger member 3 to rotate the lock tongue 2, so that the upper end of the lock tongue 2 rotates in the same direction under the action of the lever principle to lock and unlock. The specific form of the lock tongue 2 is: the upper end of the lock tongue 2 is a hook shape bent along the direction of vehicle travel (X direction), and the vehicle end lock structure matched with the lock tongue 2 is also a hook shape along the direction of vehicle travel, that is, the hooking direction of the two is the direction of vehicle travel. Due to the limitation of the narrow size in the width direction of the vehicle, it is difficult to set the hooking direction to be along the width direction of the vehicle (Y direction). Even if the size of the tongue end lock hook 202 for matching with the vehicle end lock hook 4 in the X direction is relatively more tolerant, it is limited by the size of the tongue end lock hook 202, and the matching size of the lock hook cannot be too long. Therefore, when the vehicle accelerates or decelerates, the cooperation between the vehicle-end lock hook 4 and the tongue-end lock hook 202 is affected by the inertia of the equipment, which can easily cause the two to separate from each other or be over-pressed, especially when the X-direction swing clearance of the vehicle-mounted power supply assembly basically exceeds the matching size of the two hook locks, then the above-mentioned two hook-shaped locking mechanisms will separate from each other, thereby causing the connection between the vehicle end and the vehicle-mounted power supply assembly to be disconnected, resulting in the vehicle power failure and stalling, and even a serious vehicle disintegration accident during driving. In order to solve the above technical problems, the lock tongue 2 in this embodiment is at least a pair, and is symmetrically arranged, and the unlocking action is triggered by the same trigger member 3. The tongue-end lock hooks 202 extending away from each other at the upper end of the lock tongue 2 form an interlocking structure, which is used to synchronously and diametrically hook the vehicle-end lock hook 4, so that the locking mechanism assembly is reliably fixed to the electric car.

[0062] The beneficial effects of adopting this technical solution are as follows: the use of a simple hook-shaped locking structure with an unlocking method can effectively improve the locking success rate, and the requirements for equipment processing and assembly accuracy are lower. It can achieve rapid disassembly and replacement of power with a high tolerance for dimensional deviation (0≤ tolerance in the plane floating direction≤8mm), and can achieve power replacement with low equipment use and maintenance costs, which is very beneficial to the market players' development of related markets and the popularization of power replacement technology. On the basis of this Z-direction (vehicle height direction) hook-shaped locking scheme, the symmetrically arranged locking structures form an interlocking structure, which overcomes the natural disadvantages of the hook-shaped locking scheme. In particular, in this embodiment, the same trigger 3 is used to synchronously and symmetrically control the pair of lock tongues 2, and the coordinated locking of the lock tongue 2 group is conveniently and reliably realized, and the locking instability problem that one lock tongue 2 in the lock tongue 2 group is locked and the other lock tongue 2 is not yet locked will not occur.

[0063] Furthermore, the Z-direction dimension of the vehicle-end lock hook 4 is substantially the same as the distance between the tongue-end lock hook 202 and the surface of the frame 1, and the vehicle-end lock hook 4 and the tongue-end lock hook 202 are matched in an inclined plane, and the vehicle-end lock hook 4 and the surface of the frame 1 are matched in a plane. The inclined direction of the inclined plane is from the direction of the lock tongue 2 to the direction away from the lock tongue 2, so as to form a horizontal self-locking of the vehicle-end lock hook 4 to the tongue-end lock hook 202, that is, when the lock tongue is only moved in the horizontal direction, the lock tongue 2 cannot be disengaged from the vehicle-end lock hook 4 due to the obstruction of the inner buckle inclined plane. Such a tight structural match with a self-locking function makes it impossible for the tongue-end lock hook 202 to be passively driven to rotate by the vehicle-end lock hook 4 during the relative shaking of the lock tongue 2 and the vehicle end in the X direction, and can only be actively disengaged from the vehicle-end lock hook 4 by rotating under the drive of the trigger member 3.

[0064] The specific scheme of using the same trigger member 3 to synchronously and symmetrically control the pair of lock tongues 2 is as follows:

[0065] The trigger member 3 is a cam structure of an elliptical shape, etc., and in particular, the elliptical cam structure used in this embodiment can better meet the synchronous and symmetrical unlocking and locking actions of a pair of lock tongues 2. Specifically, the conversion of the far point A and the near point B of the cam can respectively realize the lift to drive the lock tongue 2 to trigger the unlocking and the return to weaken the support of the lock tongue 2 and reset the lock tongue 2 under the tension of the elastic member. When resetting, the lock tongue 2 is in a vertical state, and the lock hooks 202 on the two lock tongues 2 are separated from each other, respectively cooperating with the two lock hooks 202 at the vehicle end to form a normally locked state. When unlocking, the trigger member 3 abuts against the side of the lock tongue 2 away from the elastic member, so that the two lock tongues 2 actively rotate symmetrically and differently, that is, the lock hook 202 at the tongue end is synchronously rotated out of the lock hook 4 at the vehicle end.

[0066] In this embodiment, the circumferential side surface of the elliptical trigger member 3 is set as an inclined curved surface 303, so that when the trigger member 3 pushes the lock tongue 2 against the tilting state, the contact between the trigger member 3 and the lock tongue 2 is always a line contact. In other words, when the lock tongue 2 changes from the vertical normally locked state to the inclined unlocked state, the circumferential side surface of the trigger member 3 always maintains a line contact with the side surface of the lock tongue 2 with its changing curved surface shape, avoiding point contact on the surface of the lock tongue 2 and the trigger member 3. The indentation caused by the point contact will seriously damage the driving smoothness of the trigger mechanism and significantly increase the phenomenon of jamming during the locking and unlocking process.

[0067] In this embodiment, in order to define the nodes of the rotation of the elliptical cam so that the far point A and the near point B can be clearly matched at the lower part of the lock tongue 2 during the rotation process, a protruding first position lock 204 is provided on the side wall of the lock tongue 2, and a protruding second position lock 301 is provided on the side wall of the trigger member 3. Specifically, a notch 203 is provided on the side where the lock tongue 2 and the trigger member 3 match, and the first position lock 204 is arranged in the notch 203, and the first position lock 204 does not exceed the boundary of the notch 203. In this way, the first position lock 204 can be directly milled out in the regular strip blank, without presetting the first position lock 204 in the prefabricated blank, which not only saves materials but also facilitates machining.

[0068] There are four second position locks 301, which are symmetrically distributed at the four end positions of the elliptical trigger member 3, namely, at the two opposite far points A and the two opposite near points B. In this way, two pairs of position locks are set at the four end points to form two sets of trigger control mechanisms within a 360° ring angle, that is, unlocking and locking controls are achieved twice when the trigger member 3 is driven to rotate one circle. This makes full use of the control characteristics of the elliptical structure on a pair of lock tongues 2 located in the same row in the technical solution, and improves the mechanical use efficiency and control efficiency.

[0069] When the first position lock 204 cooperates with the second position lock 301, the trigger member 3 drives the lock tongue 2 to be located at the unlocking or locking position. In this technical solution, the rotation node of the trigger member 3 is mechanically hard-limited by the first position lock 204 and the second position lock 301. Under the protection of the mechanical hard limit, the control accuracy requirements of the electrical control system including the motor can be effectively reduced, thereby reducing the equipment use cost and control complexity.

[0070] It should be noted that, in this embodiment, the midpoint positions of the lock limit cooperation of the first position lock 204 and the second position lock 301 are respectively located on the longitudinal and transverse midlines of the trigger member 3. In other words, the first position lock 204 is offset relative to the midline of the lock tongue 2, and the second position lock 301 is also offset relative to the longitudinal and transverse midlines of the elliptical trigger member 3, but the offset directions of the first position lock 204 and the corresponding second position lock 301 are opposite, so that when the elliptical trigger member 3 is perpendicular to the side of the lock tongue 2 with the long axis or the short axis, the first position lock 204 and the second position lock 301 are arranged on both sides of the vertical foot with the vertical foot as the rotational symmetry center. The design of this technical solution makes the second position lock 301 avoid the corresponding midline, so as to prevent the second position lock 301 from blocking the far end of the trigger member 3 from rotating to the limit position to fully push the lock tongue 2 to unlock, and to prevent the second position lock 301 from being fully reset to the normally locked position.

[0071] In another possible implementation, the second position lock 301 may be set at the extreme point or near point of the trigger member 3, and the first position lock 204 may be further offset to accommodate the need for the elliptical trigger member 3 to rotate to the extreme position or reset to the normally locked position. However, this will cause the first position lock 204 to be over-biased, and also require the lock tongue 2 to have a greater thickness to sufficiently set such an offset first position lock 204, which is not easy to achieve in the space of the vehicle chassis 302 where the space is already limited. Therefore, this solution is not the best choice.

[0072] It is also necessary to explain that: since the elliptical trigger member 3 is used to realize the triggering action on both sides within 360°, the first position lock 204 and the second position lock 301 cannot be completely locked, so that the trigger member 3 can be continuously rotated in one direction and the continuous unlocking and locking triggering can be realized. Therefore, in this embodiment, the side surface of the second position lock 301 close to the rotation forward direction cooperates with the first position lock 204 in the form of an inclined surface or an arc surface to avoid the first position lock 204 and the second position lock 301 from being completely locked, so as to realize the generation of an unlocking threshold between the first position lock 204 and the second position lock 301, and the unlocking threshold will not be too high.

[0073] In order to accommodate the first position lock 204 disposed in the notch 203, in this embodiment, the second position lock 301 is disposed at a protruding position on the side of the trigger member 3. Specifically, the bottom surface of the trigger member 3 extends radially to form a larger chassis 302. The second position lock 301 protrudes between the upper end surface of the chassis 302 and the inclined surface 303, and does not exceed the peripheral side surface of the chassis 302. This technical solution has two beneficial effects: first, the second position lock 301 is sandwiched between the chassis 302 and the inclined surface 303, which effectively improves the mechanical impact resistance of the second position lock 301, can reduce the damage rate of the second position lock 301, and extend its service life; second, in machining, the chassis 302 is used as the reference plane to machine the second position lock 301 and the inclined surface 303 on the chassis 302, which reduces the number of changes in the machining reference plane and is beneficial to improving the machining accuracy; compared with the technical solution in which the second position lock 301 protrudes radially from the side of the trigger member 3 and protrudes from the chassis 302 or even the chassis 302 is not set, the excess material on the second position lock 301 and the inclined surface 303 is cut and milled under the condition that the chassis 302 is the reference plane, which compresses the size of the blank mold as much as possible and reduces the workload of excess material cutting, thereby realizing a scientific and reasonable structural design and saving costs.

[0074] Example 2

[0075] When the oval trigger 3 is rotated to drive the lock tongues 2 on both sides to rotate and unlock, the elastic member always presses against the lock tongue 2. If the oval trigger 3 does not correspond to the side of the lock tongue 2 perpendicularly at the far point A, an effective dead point cannot be formed. The oval trigger 3 is easy to reversely rotate under pressure to retract the lock tongue 2 and form a locked state again. In order to solve the above problem, this embodiment adopts the following technical solution on the basis that other technical solutions of embodiment 1 remain basically unchanged: See Figure 11-13 A cavity 105 is provided in the center of the frame 1. The cavity 105 is connected to the outside through three arranged hole structures, wherein two of the three hole structures on both sides are positioning holes (not shown). A rod 304 is inserted into the cavity 105 through the hole structure in the middle at the upper end of the trigger member 3; the end of the rod 304 is connected to the end piece 305, and two positioning columns 306 are protruding from the end piece 305, which are used to be inserted and positioned correspondingly with the positioning holes. After positioning, the trigger member 3 is in the far-point working position.

[0076] The following technical solution is used to form tension on the rod 304: a second compression spring 5 is provided between the rod 304 and the side wall of the cavity 105 or / and between the end surface of the cavity 105 close to the trigger member 3 and the trigger member 3, and the second compression spring 5 is used to form an elastic force on the rod 304 so that the rod 304 has a tendency to move toward the positioning hole, so that the positioning column 306 and the positioning hole can be kept in the plugged state. The rod 304 and the trigger member 3 are fixedly connected, so they are locked by the locking restriction of the positioning column 306, and the positions of the end piece 305, the rod 304 and the trigger member 3 are also locked.

[0077] A hexagon socket bolt hole 6 is provided in the center of the bottom end surface of the trigger member 3. When in use, the lifting platform in the electric car battery swap station lifts the vehicle, and uses the hexagonal bolt head of the battery swap platform to rise and dock with the hexagonal bolt hole 6 of the trigger member 3. By rotating the hexagonal bolt head 90°, the trigger member 3 is driven to unlock the lock tongue 2, and then the battery swap platform is lowered, so that the vehicle and the power supply assembly follow the battery swap platform under the action of gravity to complete the disassembly action.

[0078] When installing electricity, the vehicle-mounted power supply assembly is pushed up into the chassis of the electric car, and a pair of lock tongues 2 are inserted upward between a pair of vehicle-end lock hooks 4 facing opposite each other. Under the action of the guiding inclined surfaces of the vehicle-end lock hooks 4, the lower ends of the two lock tongues 2 overcome the pressure of the elastic members, so that the upper ends of the two lock tongues 2 are close to each other. After entering the locked position, the elastic members are reset, and the lock hooks 202 at the tongue ends are respectively inserted into the corresponding vehicle-end lock hooks 4.

[0079] It should be further explained that the telescopic stroke of the rod 304 is greater than the insertion stroke of the positioning column 306, so as to ensure that the positioning column 306 can be completely disengaged from the positioning hole when the trigger member 3 is pressed and moves toward the frame 1.

[0080] Example 3

[0081] Different from the first embodiment, an independent locking tongue can be used for locking instead of using in pairs. For example, the trigger member 3 used in this embodiment is a typical cam structure, having a far point A and a near point B. The far point A and the near point B are located on the same straight line passing through the center of the circle, and correspondingly, the two second position locks 301 are also located on both sides of the straight line passing through the center of the circle. The cam rotates 180° to complete a lift or return stroke.

[0082] In this embodiment, the frame 1 for mounting the lock tongue 2 is only provided with a through hole 101 and an expanded hole 102, and the trigger member 3 is not formed between the two expanded holes 102 as in the first embodiment, but is formed outside the frame 1. The beneficial effect of this is to avoid the concentration of numerous small parts in a narrow space, avoid the accumulation of impurities and wear of the equipment, and facilitate troubleshooting.

[0083] The protection scope of the present invention is limited only by the claims. With the help of the teachings of the present invention, those skilled in the art will easily recognize that alternative structures of the structures disclosed in the present invention can be used as feasible alternative embodiments, and the embodiments disclosed in the present invention can be combined to generate new embodiments, which also fall within the scope of the appended claims.

Claims

1. An axial double-buckle locking mechanism, comprising a locking tongue hingedly mounted in a frame; one side of the locking tongue is abutted by an elastic member so that the locking tongue is reset, characterized in that: Also includes: The trigger member overcomes the elastic force of the elastic member by pressing the side of the lock tongue, so that one end of the lock tongue rotates, and the other end of the lock tongue rotates to release the lock by lever cooperation formed by the hinge connection between the lock tongue and the frame; The locking tongues are at least a pair and are symmetrically arranged, and the unlocking action is triggered by the same triggering member; A protruding first position lock is provided on the side wall of the lock tongue; A protruding second position lock is provided on the side wall of the trigger member; When the first position lock cooperates with the second position lock, the trigger member drives the lock tongue to be in the unlocking or locking position; The bottom surface of the trigger member extends radially to form a chassis, and the peripheral side surface of the trigger member is an inclined curved surface; The second position lock is located between the upper end surface of the chassis and the inclined surface, and does not exceed the peripheral side surface of the chassis; The triggering member is an elliptical cam; There are four second position locks, which are symmetrically distributed at the four end positions of the trigger member; The locking limit cooperation midpoints of the first position lock and the second position lock are respectively located on the longitudinal and transverse midlines of the trigger member.

2. The axial double-buckle locking mechanism according to claim 1, characterized in that: The triggering member is a cam; The elastic member is a first compression spring; The trigger member abuts against a side surface of the lock tongue away from the elastic member, so that the two lock tongues rotate symmetrically and differently.

3. The axial double-buckle locking mechanism according to claim 2, characterized in that: When the trigger member pushes the lock tongue against the top and tilts it, the contact between the trigger member and the lock tongue is line contact.

4. The axial double-buckle locking mechanism according to claim 1, characterized in that: A side surface of the second position lock close to the rotational forward direction cooperates with the first position lock in the form of an inclined surface to prevent the first position lock and the second position lock from being completely locked.

5. The axial double-buckle locking mechanism according to claim 1, characterized in that: A bolt hole is provided in the center of the bottom end surface of the trigger member to cooperate with an external unlocking bolt to realize rotation locking and unlocking of the trigger member; The frame is a rectangular frame, and a through hole is provided on each side of the long side of the frame; two locking tongues pass through the corresponding through holes respectively, and the lower ends of the locking tongues are cooperated by elastic members and trigger members to realize swinging and resetting around the hinge pivot; the upper ends of the locking tongues are provided with locking hooks extending away from each other to hook and lock the external vehicle end; The lower end surface of the frame is provided with an expanded hole; the expanded hole is communicated with the through hole; the elastic member is installed in the expanded hole, one end of which is inserted and fixed by a positioning bolt penetrating the frame, and the other end is clamped in the clamping groove of the locking tongue.

6. The axial double-buckle locking mechanism according to claim 1, characterized in that: A cavity is provided in the center of the frame; the cavity is connected to the outside through three arranged hole structures; two of the three hole structures on both sides are positioning holes; A rod is inserted into the cavity through a hole structure in the middle at the upper end of the trigger member; the end of the rod is connected to an end piece, and two positioning columns are protruding from the end piece, which are used to respectively engage and position with the positioning holes to place the trigger member in a remote working state.

7. The axial double-buckle locking mechanism according to claim 6, characterized in that: A second compression spring is provided between the rod and the side wall of the cavity or / and between the end surface of the cavity close to the trigger member and the trigger member; the second compression spring forms an elastic force on the rod to move the rod toward the positioning hole.

8. The axial double-buckle locking mechanism according to claim 6, characterized in that: The telescopic stroke of the rod is greater than the insertion stroke of the positioning column.

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