CN115257337A - Axial double-fastener type locking mechanism - Google Patents

Abstract

The invention belongs to the field of vehicle-mounted battery mounting equipment, and particularly relates to an axial double-buckle type locking mechanism which comprises a lock tongue mounted in a frame in a hinged manner; one side of the lock tongue is abutted by an elastic part so that the lock tongue is reset, and the lock tongue further comprises a trigger part which overcomes the elasticity of the elastic part in a mode of abutting against the side surface of the lock tongue so as to enable one end of the lock tongue to rotate, and enables the other end of the lock tongue to rotate and unlock by means of a lever matching mode formed by hinging the lock tongue and the frame; the lock tongues are at least one pair and are symmetrically arranged, and the unlocking action is triggered by the same trigger piece. According to the technical scheme, the Z-direction locking between the vehicle-mounted power supply assembly and the vehicle end is realized by utilizing a lever principle, and the problem that a locking mechanism set is easy to unlock in the acceleration and deceleration process is solved by means of a symmetrical interlocking scheme, so that the X-direction shaking of the vehicle-mounted power supply assembly cannot cause the uncontrolled unlocking with the vehicle end.

Description

Axial double-fastener type locking mechanism

Technical Field

The invention belongs to the technical field of vehicle-mounted battery mounting equipment. And in particular to an axial double snap-lock type locking mechanism.

Background

Electric cars are becoming the mainstream of the automotive market. The automobile battery replacement industry born for solving the problem of endurance anxiety develops rapidly.

For example, the electric power exchanging technology adopted by the applicant before is mainly characterized in that a plurality of shaft locks are arranged on a chassis frame, an L-shaped locking channel is formed in a lock body of each shaft lock, and a bolt controlled by an elastic piece is arranged on the locking channel. When the vehicle-mounted power supply assembly slides into the L-shaped locking channel by utilizing the shaft structure at the side part of the vehicle-mounted power supply assembly, the lock tongue is triggered to act to form locking of the shaft structure along the vehicle advancing direction (X direction), and the aim of locking the vehicle-mounted power supply assembly along the X direction is fulfilled. Because the L-shaped locking channel has the function of limiting the height of the vehicle in the height direction (Z direction), the purpose of three-dimensionally fixing the vehicle-mounted power supply assembly (the vehicle is limited by the chassis frame in the width direction, namely the Y direction) is comprehensively realized.

However, the locking scheme is directed to an electric car with a horizontal plug-in interface, so that a stroke needs to be reserved for the vehicle-mounted power supply assembly along the X direction, and the male plug-in connector part of the vehicle-mounted power supply assembly is plugged into the female plug-in connector part of the chassis frame along the X direction.

On another part of mainstream automobile models, vertical plug-in connectors are adopted more, namely, a male plug-in connector of the vehicle-mounted power supply assembly needs to be plugged in a female plug-in connector of the automobile end along the Z direction, for example, the power exchange scheme is mainly adopted by a yulai automobile.

In the related technical scheme, a screw rotation fastening mode is adopted, and the vehicle-mounted power supply assembly is connected and fastened with a vehicle end. However, the following disadvantages exist in the technology: (1) When the power is removed and replaced, the power needs to be loosened and locked once, and the thread hole need to bear certain load, so that the damage to the thread and the thread hole is large, namely the service life of equipment for screwing the screw is obviously influenced; (2) The threaded connection mode has high requirement on the Z-direction concentricity of the lock cylinder, and the machining and assembling precision of the whole electricity changing equipment, particularly the vehicle-end equipment, is difficult to ensure, so that the equipment machining cost is high, the equipment maintenance cost is high, and the electricity changing cost is high; (3) The vehicle driving environment has a great influence on the use safety and the plugging stability of the vehicle-mounted power supply assembly, and the vehicle-mounted power supply assembly is easy to loosen after the vehicle runs to generate vibration on a road section with a poor driving environment.

Disclosure of Invention

Aiming at the problems that the locking of a Z-direction lock in a bolt form is not fastened and the service life of equipment is short due to obvious abrasion of the equipment in the prior art, the invention aims to provide the Z-direction lock in a hook form, and the firm connection between a vehicle-mounted power supply assembly and a vehicle end is realized by adopting a double-lock symmetrical matching mode, so that the influence of the vehicle acceleration and deceleration on the locking state is avoided.

An axial double-buckle type locking mechanism comprises a lock tongue which is arranged in a frame in a hinged mode; one side of the bolt is abutted by the elastic piece so that the bolt is reset. The trigger part drives the lock tongue to lock and unlock. The trigger piece overcomes the elasticity of the elastic piece in a mode of abutting against the side face of the lock tongue to enable one end of the lock tongue to rotate, and enables the other end of the lock tongue to rotate and unlock in a lever matching mode formed by hinging the lock tongue and the frame.

The upper end of the lock tongue is in the shape of a hook bent along the vehicle advancing direction, and the lock structure of the vehicle end matched with the lock tongue is also in the shape of a hook along the vehicle advancing direction, namely the hooking direction of the lock tongue and the lock tongue is the vehicle advancing direction. However, due to the limitation of the size of the hook lock, the matching size of the hook lock and the hook lock cannot be set too long, when the vehicle accelerates or decelerates, the matching of the vehicle-end lock hook and the lock structure at the upper end of the lock tongue is influenced by the inertia of the equipment, so that the two hook lock mechanisms are mutually separated or excessively compressed, and particularly, when the X-direction shaking gap of the vehicle-mounted power supply assembly basically exceeds the matching size of the two hook locks, the two hook lock mechanisms are mutually separated, so that the connection between the vehicle end and the vehicle-mounted power supply assembly is separated, the power failure and stall of the vehicle are caused, and even the disassembly accident during the running of the vehicle is serious. In order to solve the technical problem, the lock tongues in the embodiment are at least one pair and are symmetrically arranged, and the unlocking action is triggered by the same trigger piece.

The technical scheme has the beneficial effects that: the locking success rate can be effectively improved by adopting the simple hook-shaped locking structure, the requirements on equipment processing and assembling precision are lower, the fault tolerance rate is high, the battery replacement can be realized by adopting lower equipment use and maintenance cost, and the development of a market main body on related markets and the popularization of a battery replacement technology are greatly facilitated. On the basis of the Z-direction hook-shaped locking scheme, the symmetrically arranged locking structures can form interlocking, the natural defects of the hook-shaped locking scheme are overcome, particularly, in the embodiment, the pair of lock tongues are synchronously and symmetrically controlled by the same trigger piece, the cooperative locking of the lock tongue groups is conveniently and reliably realized, and the problems that one lock tongue in the lock tongue groups is locked completely and the other lock tongue is not locked yet can be solved.

In a preferred embodiment, the trigger is a cam. The far point and the near point of the cam are used for respectively driving and triggering unlocking of the lock tongue by using the lift and resetting of the lock tongue under the tension of the elastic piece by using the return stroke. When the locking is reset, the lock tongue is in a normally locked state.

The elastic piece is a first pressure spring. When the spring bolt locking mechanism is used, the trigger piece is abutted against one side face, far away from the elastic piece, of the spring bolt, so that the two spring bolts rotate symmetrically and differently.

As a preferred embodiment, the peripheral side surface of the trigger is an inclined curved surface, and the trigger always makes line contact with the lock tongue in the process that the lock tongue is propped against the inclined surface by the trigger. In other words, when the lock tongue is changed from a vertical normal locking state to an inclined unlocking state, the peripheral side surface of the trigger piece is always in line contact with the side surface of the lock tongue in a changed curved surface form, so that the pressure loss of the surface of the lock tongue and the trigger piece caused by point contact is avoided, and the condition that the action smoothness of the trigger mechanism is seriously damaged is avoided.

In a preferred embodiment, a convex first position lock is arranged on the side wall of the lock tongue. And a convex second position lock is arranged on the side wall of the trigger piece. When the first position lock is matched with the second position lock, the trigger piece drives the lock tongue to be located at an unlocking or locking position. In the technical scheme, the rotation node of the trigger piece is mechanically and firmly limited through the first position lock and the second position lock. Under the protection of mechanical hard limit, the control precision requirements of electrical control systems including motors and the like can be effectively reduced, so that the use cost and the control complexity of equipment are reduced.

As a preferred embodiment, more specifically, the bottom surface of the trigger extends radially to form a bottom plate. The second position lock is positioned between the upper end surface of the chassis and the inclined curved surface and does not exceed the peripheral side surface of the chassis. The technical scheme has the beneficial effects that: firstly, a second position lock is clamped between the chassis and the inclined curved surface, so that the mechanical impact strength of the second position lock is effectively improved, the damage rate of the second position lock can be reduced, and the service life of the second position lock is prolonged; secondly, in the machining process, the base plate is used as a reference surface, and a second position lock and an inclined curved surface on the base plate are machined, so that the transformation frequency of the machining reference surface is reduced, and the machining precision is improved; compared with the technical scheme that the second position lock protrudes out of the peripheral side face of the trigger part along the radial direction and protrudes out of the chassis or even is not provided with the chassis, the second position lock and the excess material on the inclined curved surface are cut and milled under the condition that the chassis is a reference surface, the size of a blank die is compressed as much as possible, the excess material cutting workload is reduced, therefore, scientific and reasonable structural design is realized, and the cost is saved.

The trigger is an elliptical cam. The ellipse shape is a central symmetry structure and has symmetrical far points and near points, so that synchronous symmetrical unlocking and locking actions of a pair of lock tongues can be better met.

The second position lock is arranged at four positions in total, and the centers of the second position lock are symmetrically distributed on the four end positions of the trigger piece. Two pairs of position locks are arranged on the four end points, and two groups of trigger control mechanisms can be formed in a 360-degree annular angle, namely, two times of unlocking and locking control are realized when the drive trigger piece rotates for a circle. The control characteristics of the oval structure to the pair of lock tongues in the same row in the technical scheme are fully utilized, and the mechanical use efficiency and the control efficiency are improved.

The lock limiting matching midpoint positions of the first position lock and the second position lock are respectively and correspondingly positioned on the longitudinal and transverse center lines of the trigger piece. In other words, the first position lock is offset relative to the midline of the bolt, the second position lock is offset relative to both the longitudinal and transverse central axes of the oval trigger piece, but the first position lock is offset in the opposite direction relative to the corresponding second position lock. The design of this technical scheme makes the second position lock all avoid corresponding axis, avoids the second position lock to block the distal end that triggers and can not rotate to extreme position and fully promote the spring bolt unblock to and avoid the second position lock can not fully reset to the normal lock position.

In a preferred embodiment, a side of the second position lock close to the rotational advance direction is in a form of an inclined surface cooperating with the first position lock to prevent the first position lock from being completely locked with the second position lock. Because the two-side triggering action within 360 degrees is realized by the elliptical triggering piece, the first position lock and the second position lock cannot be completely locked, the one-way continuous rotation of the triggering piece can be realized, and the continuous unlocking and locking triggering can be realized. In the embodiment, the first position lock and the second position lock are matched by the inclined plane, namely, the unlocking threshold value is generated between the first position lock and the second position lock, and the unlocking threshold value is not too high.

As a preferred embodiment, a bolt hole is formed in the center of the bottom end face of the trigger part, so that the trigger part can be rotationally locked and unlocked by matching with an external unlocking bolt. In this embodiment, more specifically, the frame is a rectangular frame, and two sides of the long side of the frame are respectively provided with a through hole. The two lock tongues pass through the corresponding through holes respectively, and the lower ends of the lock tongues are matched by an elastic piece and a trigger piece to realize swinging and resetting around a hinge pivot; the upper end of the lock tongue is provided with lock hooks which deviate from each other and extend, and the lock hooks are externally connected with the car end, so that the locking mechanism assembly and the electric car are reliably fixed.

And a reaming hole is formed in the lower end face of the frame. On one hand, the arrangement of the reaming provides sufficient space for the arrangement of the elastic piece and the lock tongue; on the other hand, the weight of the equipment is reduced, namely, the vehicle is lightened. Specifically, the counterbore is in communication with the through bore. The elastic piece is installed in the reaming, one end of the elastic piece is inserted and fixed by a positioning bolt penetrating through the frame, and the other end of the elastic piece is clamped in a clamping groove of the lock tongue. The important reasons why counterboring must be provided in this embodiment are also: if the installation space undersize of elastic component, the elastic component size is shorter, then can't provide sufficient elastic deformation buffer volume for the spring bolt rotates, also can not fully alleviate elastic component deformation pressure, this leads to the elastic component to receive the effect of spring bolt turning moment and the side collapses very easily.

In a preferred embodiment, the frame is provided with a cavity in the center, and the cavity is communicated with the outside through three hole structures arranged in parallel, wherein two holes on two sides of the three hole structures are positioning holes. The center of the upper end of the trigger piece penetrates through the hole structure in the middle part by a rod and is inserted into the cavity; the end part of the rod is connected with an end piece, two positioning columns are arranged on the end piece in a protruding mode and used for being correspondingly inserted into and positioned with the positioning holes respectively, and the trigger piece is in a far point working state. If the remote positioning mechanism provided by the technical scheme is lacked, the trigger piece is difficult to be stably positioned at the remote position, and once the trigger piece is rotationally retracted under the pressure of the elastic piece, the lock tongue cannot be kept in an unlocking state.

In a preferred embodiment, a second compression spring is arranged between the rod and the side wall of the cavity or/and between the end face of the cavity close to the trigger member and the trigger member. The second pressure spring forms elasticity on the rod to enable the rod to move towards one side of the positioning hole, and the positioning column and the positioning hole can possibly keep an insertion state.

As a preferred embodiment, the telescopic stroke of the rod is greater than the inserting stroke of the positioning column, so that the positioning column can be completely separated from the positioning hole in the process that the trigger part is pressed to move towards one side of the frame.

It will be apparent that elements or features described in a single embodiment above may be used alone or in combination in other embodiments.

The invention has the beneficial effects that:

(1) According to the technical scheme, the Z-direction locking of the vehicle-mounted power supply assembly and the vehicle end is realized by utilizing a lever principle, and the problem that a locking mechanism set is easy to unlock in the acceleration and deceleration process is solved by means of a symmetrical interlocking scheme. Therefore, the X-direction shaking of the vehicle-mounted power supply assembly cannot cause uncontrolled unlocking with the vehicle end.

(2) A trigger part synchronously controls the interlocking of the pair of lock tongues, the control stability is good, and a complex motor coordination synchronous control scheme is replaced by a smart mechanical structure, so that the control cost is lower.

(3) In order to solve the problem that the posture of the oval trigger piece at the far end is not easy to keep, the technical scheme provides a horizontal plane locking positioning column and positioning hole matching mechanism, so that the defect that the oval mechanism is solid is overcome. On the other hand, the arrangement can also realize the integration of the trigger piece and the frame and other structures, namely, the trigger piece is not required to be arranged at the battery replacement station end and is integrated with the vehicle-mounted power supply assembly end, so that only a hexagonal bolt head or other mechanisms for driving the trigger piece to rotate are required to be arranged on the battery replacement platform at the station end, the complexity of the battery replacement platform equipment at the station end is further reduced, the equipment damage risk is transferred to the replaceable vehicle-mounted power supply assembly end, and the influence of the damage of the battery replacement equipment at the station end on all battery replacement processes is favorably avoided.

Drawings

In the drawings, the size and the proportion do not represent the size and the proportion of an actual product. The figures are merely illustrative and certain unnecessary elements or features have been omitted for clarity.

Fig. 1 is a first perspective view of embodiment 1;

FIG. 2 is a perspective view from a second perspective of embodiment 1;

FIG. 3 is a perspective assembly view of embodiment 1;

FIG. 4 is a front view showing a locked state of embodiment 1;

FIG. 5 is a front view of the locking process of embodiment 1;

fig. 6 is an unlocked state front view of embodiment 1;

fig. 7 is a schematic view of the engagement of the latch bolt and the trigger of embodiment 1;

fig. 8 is a perspective view of the locking bolt;

FIG. 9 is a perspective view of the trigger of embodiment 1;

FIG. 10 is a top view of the trigger of embodiment 1;

FIG. 11 is a front view showing a locked state of the embodiment 2;

FIG. 12 is an enlarged view of portion C of FIG. 11;

fig. 13 is a perspective view showing a locked state of embodiment 2.

Description of the reference numerals

1. A frame;

101. a through hole; 102. reaming; 103. positioning the bolt; 104. a first pressure spring; 105. a cavity; 106. positioning holes;

2. a latch bolt;

201. a card slot; 202. a latch hook at the tongue end; 203. a notch; 204. a first position lock;

3. a trigger;

301. a second position lock; 302. a chassis; 303. an oblique curved surface; 304. a rod; 305. an end piece; 306. a positioning column;

4. a vehicle end lock hook;

5. a second pressure spring;

6. inner hexagon bolt holes;

A. a far point;

B. and (4) a near point.

Detailed Description

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment in accordance with the present invention and other ways of practicing the invention will occur to those skilled in the art and are within the scope of the invention.

Example 1

As shown in fig. 1 to 10, an axial double-snap type locking mechanism includes a rectangular frame 1. The frame 1 is respectively vertically penetrated and provided with a through hole 101 along the two sides of the length direction, the two lock tongues 2 are respectively vertically inserted into the corresponding through holes 101, and the middle parts of the corresponding lock tongues 2 are penetrated through by the horizontal hinged pivot shaft, so that the lock tongues 2 rotate around the width direction of the frame 1.

The lower end face of the frame 1 is provided with a counterbore 102. The counterbore 102 is larger in size than the through hole 101 and communicates with the through hole 101 on the corresponding side. Two end faces of the frame 1 along the length direction are respectively provided with a positioning bolt 103 in a penetrating way, and the positioning bolts 103 penetrate through the side wall of the frame 1 in a screwing way and then extend into the counterbores 102. A first pressure spring 104 is horizontally arranged in the reaming hole 102, one end of the first pressure spring 104 is tightly sleeved on the corresponding positioning bolt 103, and the other end of the first pressure spring is inserted into a clamping groove 201 reserved on the surface of the bolt 2. When the bolt 2 is driven to compress the first pressure spring 104 and rotate, although the first pressure spring 104 is subjected to the torque of the bolt 2, the two ends of the first pressure spring 104 are limited to be locked, so that the side-tipping phenomenon can not occur, and the elastic support stability and the safety of the bolt 2 are guaranteed.

The arrangement of the reaming hole 102 provides a sufficient space for the arrangement of the elastic elements such as the first pressure spring 104 and the bolt 2, and reduces the weight of the equipment, namely, is beneficial to the light weight of the vehicle. The important reasons why the counterbore 102 must be provided in this embodiment are also: if the installation space undersize of elastic component leads to the elastic component size shorter, then first pressure spring 104 can't provide sufficient elastic deformation buffer volume for spring bolt 2 rotates, also can not fully disperse and alleviate elastic component deformation pressure, promptly, the rotation of spring bolt 2 will produce bigger bending angle on the first pressure spring 104 of undersize, this leads to the elastic component to receive the effect of spring bolt 2 turning moment and the side collapses very easily.

One side of the bolt 2 is abutted by an elastic part (a first pressure spring in the embodiment) so that the bolt 2 resets, and the other side of the bolt 2 is driven by the trigger part 3 to rotate the bolt 2, so that the upper end of the bolt 2 rotates in the same direction under the action of a lever principle to lock and unlock. The specific form of spring bolt 2 does: the upper end of the bolt 2 is in the shape of a hook bent along the vehicle traveling direction (X direction), and the lock structure of the vehicle end matched with the bolt 2 is also in the shape of a hook along the vehicle traveling direction, i.e. the hooking direction of the two is the vehicle traveling direction. It is difficult to set the hooking direction along the vehicle width direction (Y direction) because of the restriction of the narrower dimension in the vehicle width direction. Even if the dimension in the X direction for the tongue-end lock hook 202 to be fitted with the car-end lock hook 4 is relatively more tolerant, the fitting dimension of the lock hook cannot be too long due to the dimension limitation of the tongue-end lock hook 202. Therefore, when the vehicle accelerates or decelerates, the matching between the vehicle-end locking hook 4 and the tongue-end locking hook 202 is affected by the inertia of the device, which easily causes the mutual separation or excessive compression of the two, especially when the X-direction shaking gap of the vehicle-mounted power supply assembly basically exceeds the matching size of the two hook locks, the two hook-shaped locking mechanisms will be separated from each other, which further causes the separation of the connection between the vehicle-end and the vehicle-mounted power supply assembly, resulting in the power failure and stalling of the vehicle, and even the occurrence of the disassembly accident during the vehicle running. In order to solve the above technical problem, the lock tongues 2 in this embodiment are at least a pair, and are symmetrically arranged, and the same trigger piece 3 triggers the unlocking action. The tongue end lock hooks 202 extending away from each other at the upper end of the lock tongue 2 form an interlocking structure, and are used for locking the car end lock hook 4 by a synchronous anisotropic hook, so that the locking mechanism assembly is reliably fixed with the electric car.

The technical scheme has the beneficial effects that: the hook-shaped locking structure with a simple locking and unlocking mode can effectively improve the locking success rate, has lower requirements on equipment processing and assembling precision, realizes high size deviation fault tolerance rate (the fault tolerance in the plane floating direction is more than or equal to 0 and less than or equal to 8 mm) of quick power replacement, can realize power replacement by adopting lower equipment use and maintenance cost, and is very favorable for the development of market main bodies on related markets and the popularization of power replacement technology. On the basis of the Z-direction (vehicle height direction) hook-shaped locking scheme, the symmetrically arranged locking structures form interlocking, so that the natural defects of the hook-shaped locking scheme are overcome, particularly, in the embodiment, the pair of lock tongues 2 are synchronously and symmetrically controlled by the same trigger piece 3, the cooperative locking of the lock tongue 2 groups is conveniently and reliably realized, and the problem that the locking of one lock tongue 2 in the lock tongue 2 groups is finished and the locking of the other lock tongue 2 is not stable is solved.

Further, the dimension of the vehicle-end locking hook 4 in the Z direction is substantially the same as the distance between the tongue-end locking hook 202 and the surface of the frame 1, and the matching between the vehicle-end locking hook 4 and the tongue-end locking hook 202 is an inclined plane matching, and the matching between the vehicle-end locking hook 4 and the surface of the frame 1 is a plane matching. The inclined direction of the inclined plane is reduced from the direction of the lock tongue 2 to the direction far away from the lock tongue 2, so that the vehicle end lock hook 4 can horizontally self-lock the lock tongue end lock hook 202, namely, under the condition that the lock tongue is moved only in the horizontal direction, the lock tongue 2 cannot be separated from the vehicle end lock hook 4 due to the blocking of the inner buckled inclined plane. The structure matching with the self-locking function is tight, so that the tongue end locking hook 202 cannot be driven to rotate by the vehicle end locking hook 4 passively in the process that the tongue 2 and the vehicle end shake relatively in the X direction, and can only be driven by the trigger 3 to disengage from the vehicle end locking hook 4 actively in a rotating mode.

The specific scheme of synchronously and symmetrically controlling the pair of lock tongues 2 by adopting the same trigger piece 3 is as follows:

the trigger piece 3 is a cam structure with an oval shape and the like, and particularly, the oval cam structure adopted in the embodiment can better meet the requirement of synchronous symmetrical unlocking and locking actions of the pair of lock tongues 2. Specifically, the lift can be used for driving, triggering and unlocking the bolt 2 and weakening and supporting the bolt 2 through the return stroke by utilizing the far point A and the near point B of the cam respectively, and the bolt 2 can be reset under the tension of the elastic piece. When resetting, the bolt 2 is in a vertical state, and the two lock hooks 202 on the bolt 2 deviate from each other and are respectively matched with the two lock hooks 202 at the vehicle end to form a normally locked state. During unlocking, the trigger 3 is abutted against one side of the lock tongue 2 far away from the elastic element, so that the two lock tongues 2 actively rotate symmetrically and differently, namely the lock hook 202 at the end of the lock tongue synchronously rotates and disengages from the lock hook 4 at the end of the vehicle.

In this embodiment, the peripheral side surface of the oval trigger 3 is set as an inclined curved surface 303, so that the trigger 3 abuts against the bolt 2 and the contact between the trigger 3 and the bolt 2 is always line contact in the process of inclining. In other words, when the bolt 2 is changed from the vertical normally-locked state to the inclined unlocked state, the peripheral side surface of the trigger 3 is always in line contact with the side surface of the bolt 2 in the changed curved surface form, so that the pressure loss of the bolt 2 and the surface of the trigger 3 due to point contact is avoided. The indentation caused by point contact will seriously damage the driving smoothness of the trigger mechanism, and obviously increase the clamping stagnation phenomenon in the locking and unlocking process.

In this embodiment, in order to define the rotation node of the oval cam, so that the far point a and the near point B can be matched with the lower part of the bolt 2 relatively clearly during the rotation process, the side wall of the bolt 2 is provided with a convex first position lock 204, and the side wall of the trigger 3 is provided with a convex second position lock 301 in a matching manner. Specifically, a notch 203 is formed in a side surface of the latch 2 that is engaged with the trigger 3, and the first position lock 204 is disposed in the notch 203, and the first position lock 204 does not exceed a boundary of the notch 203. In this way, the first position lock 204 can be milled directly in the regular strip-shaped blank without presetting the first position lock 204 in the preform, which not only saves material, but also facilitates machining.

The second position lock 301 has four positions, and the centers of the four positions are symmetrically distributed on the four end positions of the oval trigger 3, namely, the positions of two opposite far points a and two opposite near points B. In this way, two pairs of position locks are arranged on four end points to form two groups of trigger control mechanisms in a 360-degree annular angle, namely, two times of unlocking and locking control are realized when the trigger piece 3 is driven to rotate for one circle. The control characteristics of the oval structure to the pair of lock tongues 2 positioned in the same row in the technical scheme are fully utilized, and the mechanical use efficiency and the control efficiency are improved.

When the first position lock 204 is matched with the second position lock 301, the trigger 3 drives the bolt 2 to be located at an unlocking or locking position. In this embodiment, the rotation node of the trigger 3 is mechanically hard-limited by the first position lock 204 and the second position lock 301. Under the protection of mechanical hard limit, the control precision requirements of electrical control systems including motors and the like can be effectively reduced, so that the use cost and the control complexity of equipment are reduced.

It should be noted that, in the present embodiment, the lock-limiting engagement midpoint positions of the first position lock 204 and the second position lock 301 are located on the longitudinal and transverse middle lines of the trigger 3, respectively. In other words, the first position lock 204 is offset relative to the median line of the lock tongue 2, and the second position lock 301 is offset relative to both the longitudinal and transverse central axes of the oval trigger 3, but the offset direction of the first position lock 204 is opposite to that of the corresponding second position lock 301, so that when the oval trigger 3 vertically corresponds to the side of the lock tongue 2 with the major axis or the minor 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 scheme makes second position lock 301 all avoid corresponding axis, avoids second position lock 301 to block that the distal end of trigger 3 can not rotate to extreme position and fully promotes the unblock of spring bolt 2, and avoids second position lock 301 can not fully reset to the normal lock position.

In another possible embodiment, the second position lock 301 could be located at the forward or near position of the trigger 3 and the first position lock 204 could be more biased to accommodate the need for the elliptical trigger 3 to rotate to the extreme position or return to the normal lock position, but this would result in over-biasing the first position lock 204, and would also require a greater thickness of the bolt 2 to be sufficient to locate the so biased first position lock 204, which is not easily possible in a vehicle chassis 302 space where space is limited, and is therefore not the best option.

Also specifically noted are: because the elliptical trigger 3 is used for realizing two-side triggering within 360 degrees, the first position lock 204 and the second position lock 301 cannot be completely locked, so that the one-way continuous rotation of the trigger 3 can be realized, and the continuous unlocking and locking triggering can be realized. Therefore, in this embodiment, a side surface of the second position lock 301 close to the rotational advancing direction is matched with the first position lock 204 in an inclined plane or an arc surface manner, so as to prevent the first position lock 204 and the second position lock 301 from being completely locked, and thus, a lock releasing threshold value is generated between the first position lock 204 and the second position lock 301, and the lock releasing threshold value is not too high.

In order to accommodate the first position lock 204 arranged in the notch 203, the second position lock 301 is arranged in this embodiment in a laterally protruding position of the trigger 3. Specifically, the bottom surface of the trigger 3 extends in the radial direction to form a bottom plate 302 having a larger size. The second position lock 301 protrudes between the upper end surface of the chassis 302 and the inclined curved surface 303 and does not exceed the peripheral side surface of the chassis 302. The technical scheme has the beneficial effects that: firstly, the second position lock 301 is clamped between the chassis 302 and the inclined curved surface 303, so that the mechanical impact strength of the second position lock 301 is effectively improved, the damage rate of the second position lock 301 can be reduced, and the service life of the second position lock is prolonged; secondly, in machining, the base plate 302 is used as a reference surface, and the second position lock 301 and the inclined curved surface 303 on the base plate 302 are machined, so that the number of times of changing the machining reference surface is reduced, and the machining precision is improved; compared with the technical scheme that the second position lock 301 protrudes out of the 3-circumference side face of the trigger part along the radial direction and protrudes out of the chassis 302 or even is not provided with the chassis 302, the excess materials on the second position lock 301 and the inclined curved surface 303 are cut and milled under the condition that the chassis 302 is a reference surface, the size of a blank die is compressed as much as possible, the excess material cutting workload is reduced, and therefore scientific and reasonable structural design is achieved, and cost is saved.

Example 2

When the oval trigger piece 3 rotates to drive the lock tongues 2 on the two sides to rotate and unlock, the elastic piece always presses against the lock tongues 2. If the oval trigger 3 does not vertically correspond to the side surface of the bolt 2 by the far point a, an effective dead point cannot be formed, and the oval trigger 3 is easy to rotate reversely under pressure to retract the bolt 2, so that the locking state is formed again. In order to solve the above problem, the present embodiment adopts the following technical solutions on the basis that other technical solutions of embodiment 1 are basically unchanged: referring to fig. 11-13, a cavity 105 is formed in the center of the frame 1, and the cavity 105 is communicated with the outside through three hole structures arranged, wherein two holes on two sides of the three hole structures are positioning holes 106. The center of the upper end of the trigger piece 3 is inserted into the cavity 105 through a hole structure in the middle by a rod 304; the end of the rod 304 is connected to an end plate 305, two positioning posts 306 are protruded from the end plate 305, and are used for corresponding inserting and positioning with the positioning holes 106, respectively, and after positioning, the trigger 3 is located at a far point working position.

And the following technical scheme is adopted to form the tension of the rod 304: a second pressure spring 5 is arranged between the rod 304 and the side wall of the cavity 105 or/and between the end face of the cavity 105 close to the trigger 3 and the trigger 3, and the rod 304 has a tendency to move towards one side of the positioning hole 106 by utilizing the elastic force formed on the rod 304 by the second pressure spring 5, so that the positioning column 306 and the positioning hole 106 can possibly keep an inserted state. The rod 304 is fixed to the trigger 3, so that the position of the end piece 305, the rod 304 and the trigger 3 is locked by the locking restriction of the positioning post 306.

The center of the bottom end surface of the trigger 3 is provided with an inner hexagon bolt hole 6. When the electric car battery replacing station is used, the lifting platform in the electric car battery replacing station lifts a car, the hexagonal bolt head of the battery replacing platform is lifted to be butted with the inner hexagonal bolt hole 6 of the trigger piece 3, the trigger piece 3 is driven to unlock the lock tongue 2 by rotating the hexagonal bolt head for 90 degrees, the battery replacing platform is lowered, the car moves downwards along with the battery replacing platform under the action of gravity, and the disassembling action is completed.

When the electric car is electrified, the vehicle-mounted power supply assembly is pushed up to the chassis of the electric car, the pair of lock tongues 2 is upwards inserted between the pair of car end lock hooks 4 facing opposite, under the action of the guide inclined planes of the car end lock hooks 4, the lower ends of the two lock tongues 2 overcome the pressure of the elastic element to enable the upper ends of the two lock tongues 2 to be close to each other, after the car end lock hooks enter the locking position, the elastic element resets, and the lock tongues 202 are respectively clamped into the corresponding car end lock hooks 4.

It should be additionally noted that: the telescopic stroke of the rod 304 is larger than the inserting stroke of the positioning column 306, so that the positioning column 306 can be completely separated from the positioning hole 106 in the process that the trigger 3 is pressed to move towards one side of the frame 1.

Example 3

Unlike embodiment 1, a separate latch bolt lock may be used instead of a pair. For example, the trigger 3 used in the present 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 two sides of the straight line passing through the center of the circle. The cam rotates 180 ° to complete one lift or return stroke.

In this embodiment, the frame 1 for installing the bolt 2 is only provided with one through hole 101 and one counterbore 102, and the trigger 3 is formed outside the frame 1 instead of being formed between the two counterbores 102 as in embodiment 1, so that the beneficial effects of avoiding the concentration of fine and various parts in a narrow space, avoiding the accumulation of impurities and the wear of equipment and facilitating the troubleshooting are achieved.

The scope of the invention is limited only by the claims. Persons of ordinary skill in the art, having benefit of the teachings of the present disclosure, will readily appreciate that alternative structures to the disclosed structures can be substituted for the possible embodiments and that the disclosed embodiments can be combined to create new embodiments that also fall within the scope of the appended claims.

Claims (10)

1. An axial double-buckle type locking mechanism comprises a lock tongue which is arranged in a frame in a hinged mode; one side of spring bolt is so that the spring bolt resets by the elastic component butt, its characterized in that still includes:

the trigger piece overcomes the elasticity of the elastic piece in a mode of abutting against the side surface of the lock tongue to enable one end of the lock tongue to rotate, and enables the other end of the lock tongue to rotate and unlock in a lever matching mode formed by hinging the lock tongue and the frame;

the lock tongues are at least one pair and are symmetrically arranged, and the unlocking action is triggered by the same trigger piece.

2. The axial double-snap locking mechanism according to claim 1, characterized in that:

the trigger is a cam;

the elastic piece is a first pressure spring;

the trigger part is abutted against one side face of the lock tongue far away from the elastic part, so that the two lock tongues rotate symmetrically and differently.

3. The axial double-snap locking mechanism according to claim 2, characterized in that:

the peripheral side surface of the trigger piece is an inclined curved surface, and the trigger piece is in line contact with the spring bolt in the process that the spring bolt is abutted against the inclined surface by the trigger piece.

4. The axial double-snap locking mechanism according to claim 1, characterized in that:

a convex first position lock is arranged on the side wall of the lock tongue;

a convex second position lock is arranged on the side wall of the trigger piece;

when the first position lock is matched with the second position lock, the trigger piece drives the lock tongue to be located at an unlocking or locking position.

5. The axial double-snap locking mechanism according to claim 4, wherein:

the bottom surface of the trigger piece extends radially to form a chassis;

the second position lock is positioned between the upper end surface of the chassis and the inclined curved surface and does not exceed the peripheral side surface of the chassis;

the trigger piece is an oval cam;

the second position lock is provided with four positions, and the centers of the second position locks are symmetrically distributed on four end points of the trigger piece;

the lock limiting matching midpoint positions of the first position lock and the second position lock are respectively and correspondingly positioned on the longitudinal and transverse center lines of the trigger piece.

6. The axial double-snap locking mechanism according to claim 4, wherein:

one side surface of the second position lock close to the rotating advancing direction is matched with the first position lock in an inclined plane mode so as to prevent the first position lock and the second position lock from being completely locked.

7. The axial double-snap locking mechanism according to claim 1, characterized in that:

a bolt hole is formed in the center of the bottom end face of the trigger piece so as to be matched with an external unlocking bolt to realize rotation locking and unlocking of the trigger piece;

the frame is a rectangular frame, and two through holes are respectively formed in two sides of the long side of the frame; the two lock tongues pass through the corresponding through holes respectively, and the lower ends of the lock tongues are matched by an elastic piece and a trigger piece to realize swinging and resetting around a hinge pivot; the upper end of the lock tongue is provided with lock hooks which deviate from each other and extend, and the lock hooks are externally connected with the vehicle end;

a hole is formed in the lower end face of the frame; the counterbores are communicated with the through holes; the elastic piece is installed in the reaming, one end of the elastic piece is inserted and fixed by a positioning bolt penetrating through the frame, and the other end of the elastic piece is clamped in the clamping groove of the spring bolt.

8. The axial double-snap locking mechanism according to claim 1, characterized in that:

a cavity is arranged in the center of the frame; the cavity is communicated with the outside through three arranged hole structures; two of the two sides of the three hole structures are positioning holes;

the center of the upper end of the trigger piece is inserted into the cavity through a hole structure in the middle by a rod; the end part of the rod is connected with an end piece, two positioning columns are arranged on the end piece in a protruding mode and used for being correspondingly inserted into and positioned with the positioning holes respectively, and the trigger piece is in a far point working state.

9. The axial double-snap locking mechanism according to claim 8, wherein:

a second pressure spring is arranged between the rod and the side wall of the cavity or/and between the end surface of the cavity close to the trigger part and the trigger part; the second pressure spring forms elasticity on the rod to enable the rod to move towards one side of the positioning hole.

10. The axial double-snap locking mechanism according to claim 8, wherein:

the telescopic stroke of the rod is larger than the inserting stroke of the positioning column.

Images