CN112406619B - Lightweight battery release mechanism assembly - Google Patents

Abstract

The invention relates to a light-weight battery unlocking mechanism assembly, and belongs to the technical field of mechanical lock equipment. The device comprises an unlocking frame, wherein the frame comprises a left longitudinal beam and a right longitudinal beam which are parallel to each other, and the front end and the rear end of the left longitudinal beam and the rear end of the right longitudinal beam are respectively connected and fixed by a front beam and a rear beam; the inner side surfaces of the left longitudinal beam or/and the right longitudinal beam are/is provided with a locking frame, and the locking frame is used for fixing and bearing the battery assembly; the locking frame comprises a hook-shaped frame and an F lock; the hook frame comprises a main back beam; one end of the main back beam is bent downwards for a certain distance and then bent reversely for a certain distance, so that a strut bearing groove is formed below the main back beam; the other end of the main back beam bends downwards to form the other side wall of the supporting column bearing groove. The invention adopts the movable locking structure embedded in the main back beam, thereby skillfully integrating all structures on the premise of occupying the smallest transverse space, and reserving the space for the battery assembly as much as possible in the reserved space fixed by the automobile chassis so as to improve the electric storage capacity.

Description

Lightweight battery release mechanism assembly

Technical Field

The invention relates to the technical field of mechanical lock equipment, in particular to a lightweight battery unlocking mechanism assembly.

Background

The traditional energy is exhausted day by day, and pure electric vehicles gradually become the mainstream in the field of locomotives. When the pure electric vehicle is popularized, the biggest problem is that the charging time is too long, and the use experience of a driver is seriously influenced. In order to solve the problem, many new energy automobile enterprises adopt a quick battery replacement technology, namely a battery assembly convenient to detach is mounted on a locomotive, and the requirement of continuous driving of a user is met by replacing an electrified battery at a specific battery replacement station.

In the process of realizing quick battery replacement, the most important problem lies in how to ensure that the battery assembly can be conveniently and flexibly mounted on an automobile or disassembled from the automobile, and the battery assembly after being mounted can be reliably fixed and is subjected to severe driving environments such as bumping and shaking of the automobile.

Application number is 2019212252482, the utility model discloses an electric automobile locking mechanism is disclosed for 2020 month 05 12 days of grant announcement day, including two side boards, front panel and back handle, two parallel and symmetrical settings in side board, the medial surface of side board is equipped with a plurality of latch segments that are located same straight line, the medial surface of side board is equipped with the connecting rod, the connecting rod is parallel with side board, the bottom of connecting rod is equipped with the spacer pin, the spacer pin can insert first latch segment, the spacer pin can remove at vertical direction along with the connecting rod, the spacer pin is used for blocking the breach of latch segment, form the locking space, the bottom of connecting rod still is equipped with the guide pillar that the cover has the spring, the guide pillar is fixed with side board, the connecting rod cover is located on the guide pillar, the connecting rod can be followed the guide pillar and removed at vertical direction. This device adopts cuboid bayonet lock to lock the battery, but this device has the following problem, and first of all, the battery assembly mounting bracket of vehicle is not in the horizontal gesture, and the vehicle is at the beginning of the design, or after installing the battery, or has the low automobile body gesture of front side after using, leads to battery lift platform to appear inclining. At the beginning of the design of above-mentioned equipment, what considered is to jack up the connecting rod simultaneously under horizontal gesture, but in the in-service use in case the connecting rod appears inclining, with the connecting rod complex horizontal installation's jacking equipment will not effectively with connecting rod horizontal migration unblock, the dead situation of card appears more easily, reduces and trades the electric success rate. Secondly, a plurality of locking mechanisms and a plurality of spring supporting mechanisms are simultaneously operated by the long connecting rod, and the arrangement mode can provide higher requirements for the action synchronism of each locking mechanism, namely higher requirements for the processing precision and the installation precision of parts, so that the processing cost is higher, and the popularization cost is increased.

Disclosure of Invention

1. Problems to be solved

Aiming at the problem that a long connecting rod structure in the prior art is difficult to keep high-precision matching with an unlocking mechanism for a long time, so that the unlocking process is easy to block, the invention provides a lightweight battery unlocking mechanism assembly.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A light-weight battery unlocking mechanism assembly comprises an unlocking frame, wherein the frame comprises a left longitudinal beam and a right longitudinal beam which are parallel to each other, and the front end and the rear end of the left longitudinal beam and the rear end of the right longitudinal beam are respectively connected and fixed by a front beam and a rear beam;

the inner side surfaces of the left longitudinal beam or/and the right longitudinal beam are/is provided with a locking frame, and the locking frame is used for fixing and bearing a battery assembly;

the locking frame comprises a hook-shaped frame and an F lock;

the hook frame comprises a main back beam;

one end of the main back beam is bent downwards for a certain distance and then bent reversely for a certain distance, so that a strut bearing groove is formed below the main back beam; the other end of the main back beam is bent downwards to form the other side wall of the strut bearing groove;

the F lock comprises a main hook positioned above the hook-shaped frame and an auxiliary hook positioned in the middle of the F lock;

the auxiliary hook extends towards the hook-shaped frame and forms a movable buckle capable of plugging the supporting groove of the support; the auxiliary hook enables the F lock to move or rotate relative to the hook-shaped frame by virtue of an elastic piece between the hook-shaped frame and the F lock, so that the auxiliary hook can block or open the supporting column bearing groove;

preferably, the F-lock is mounted on the hook frame in a hinged manner.

Preferably, the auxiliary hook is mounted on the hook-shaped frame in a hinged manner, and the other part of the auxiliary hook extends into the strut bearing groove; the end of the main hook protrudes relative to the main back beam for engaging an unlocking mechanism.

Preferably, a compression spring is arranged between one end of the main hook, which is far away from the strut bearing groove, and the main back beam.

Preferably, a tension spring is arranged between one end of the main hook close to the strut bearing groove and the main back beam.

Preferably, one side of the main hook, which is close to the pillar bearing groove, is hinged to the main back beam, the other end of the main hook protrudes relative to the main back beam and is used for being matched with the unlocking mechanism, and a tension spring is arranged between one end of the main hook, which is far away from the pillar bearing groove, and the main back beam.

Preferably, one side of the main hook, which is far away from the strut bearing groove, is hinged with the main back beam, and a tension spring is arranged between one side of the main hook, which is near to the strut bearing groove, and the main back beam.

Preferably, the F lock and the hook-shaped frame move in a relative translation mode, and the F lock and the hook-shaped frame are reset to be in a close state by a spring; the protruding portion of the F-lock relative to the hook-shaped frame is used for matching with an unlocking mechanism.

Preferably, the middle part of the main back beam is provided with a vertical groove for the auxiliary hook to pass through, the auxiliary hook is pressed down along with the main hook, and the auxiliary hook passes through the vertical groove and then plugs the opening of the supporting column bearing groove.

Preferably, the upper part of the strut bearing groove is further provided with an avoidance groove;

the auxiliary hook bypasses one side of the main back beam in an encircling mode and extends into the strut bearing groove; when the F lock is pushed upwards by force, the auxiliary hook rises back to the avoiding groove, and the position is the limit position of the rising of the auxiliary hook.

3. Advantageous effects

Compared with the prior art, the invention has the beneficial effects that:

(1) the invention adopts the movable lock catch structure embedded in the main back beam, thereby skillfully integrating all the structures on the premise of occupying the smallest transverse space as possible. By adopting the scheme of reducing the transverse size of the equipment, the space can be reserved for the battery assembly as much as possible in the reserved space fixed by the automobile chassis so as to improve the electric storage capacity and meet the actual market demand of long-term endurance of the automobile, which is one of the cores of the sale and sale points of pure electric automobiles.

(2) The invention adopts the matching structure that the auxiliary hook is sleeved on the solid main back beam in a surrounding way, so that the hook-shaped frame can be used as a hook-shaped auxiliary frame universally, and the universality of parts is improved.

(3) The invention can change the distance between the sliding plate and the sensor (displacement sensor) relative to the hook-shaped auxiliary frame by rotating the adjusting sleeve to move relative to the inner shell sleeve, thereby realizing the change of the extension length of the probe rod in the supporting column bearing groove, adapting to the transverse dimension of the supporting column bearing groove, not only adapting to the requirements of different types of battery assemblies with different splicing depths, but also being convenient for realizing hardware compensation on assembly errors and improving the use effect of the displacement sensor.

(4) The collision avoidance block made of elastic materials and arranged on the side part of the battery assembly is adopted, so that the collision between the battery assembly and the unlocking frame is reduced, and meanwhile, the inclined plane structure on the collision avoidance block can play a guiding role, so that the battery assembly is smoothly arranged, and the collision impact is reduced. Furthermore, the coil spring is adopted to buffer the lateral movement of the collision avoidance block, so that the side impact caused by radial component force generated when the inclined surface structure contacts the unlocking frame can be protected.

Drawings

FIG. 1 is a schematic diagram of a battery assembly at a front upper right view;

FIG. 2 is a schematic diagram of a battery assembly at a rear, upper left side view;

FIG. 3 is a schematic view of a battery assembly at a rear left lower viewing angle;

FIG. 4 is a structural diagram of the unlocking frame at the upper right view of the front part;

FIG. 5 is a structural diagram of the unlocking frame at the left lower side view of the rear part;

FIG. 6 is a schematic view of the front portion of the unlocking frame at an upper right view angle in cooperation with the battery assembly;

FIG. 7 is a schematic view of the rear left lower side view of the release bracket in cooperation with the battery assembly;

FIG. 8 is a schematic view of a locking frame according to an embodiment;

FIG. 9 is a schematic view showing the locking bracket of an embodiment with the hook type bracket removed;

FIG. 10 is a schematic view of a first perspective of a hook frame in one embodiment;

FIG. 11 is a second perspective view of an embodiment of a hook frame;

FIG. 12 is a schematic view of a third perspective of a hook frame in one embodiment;

FIG. 13 is a schematic view of a first perspective of the shock post/adjuster bolt;

FIG. 14 is a second perspective view of the shock post/adjuster bolt;

FIG. 15 is a schematic view of the sensor and hook-type auxiliary frame;

FIG. 16 is a schematic view of a sensor holder;

FIG. 17 is a schematic view of a protective mounting plate construction;

FIG. 18 is a schematic view of an impact pad configuration;

FIG. 19 is a schematic view of the shield structure;

FIG. 20 is a schematic view of the overall structure of the guide block;

FIG. 21 is a schematic view of a first view angle of the positioning sleeve fixedly connected to the inverted V-shaped guide frame;

FIG. 22 is a schematic view of a second perspective of the positioning sleeve fixedly connected to the inverted V-shaped guide frame;

FIG. 23 is a schematic view of a 6-degree-of-freedom full constraint applied to a fixing seat of an unlocking frame;

FIG. 24 is a view of modal data and characterization for the unlocking frame of order 1 under the constraint of FIG. 23;

FIG. 25 is a 2 nd order modal data and characterization plot of the unlocking frame under the constraint of FIG. 23;

FIG. 26 is a graph of modal data and characterization for the unlocking frame 3 order under the constraint of FIG. 23;

FIG. 27 is a graph of modal data and characterization for the unlocking frame at 4 th order under the constraint of FIG. 23;

FIG. 28 is a representation of modal data of 5 th order of the unlocking frame under the constraint of FIG. 23;

FIG. 29 is a representation of modal data for the unlocking frame of order 6 under the constraint of FIG. 23;

FIG. 30 is a schematic view of the locking frame and the hook-type auxiliary frame being forced to apply a load to the battery assembly 5250N;

FIG. 31 is an enlarged 50 times deformation effect diagram of the unlocking frame in FIG. 30;

FIG. 32 is a force-bearing effect diagram of the unlocking frame in FIG. 30;

FIG. 33 is an enlarged view of a portion A of the maximum force portion in FIG. 32;

FIG. 34 is a schematic view of the bolt hole constraint in the locking bracket and 1000N force applied to the secondary hook;

FIG. 35 is a force-receiving effect diagram of the locking bracket of FIG. 34;

FIG. 36 is an enlarged view of portion B (rear leg pivot support sleeve) of FIG. 35;

FIG. 37 is a schematic view of the displacement of the locking bracket of FIG. 34;

FIG. 38 is a simplified diagram of a guide block digital model;

FIG. 39 is a schematic view of the guide block 1000N load application;

FIG. 40 is a force effect diagram of the guide block under the force condition of FIG. 39;

FIG. 41 is a graph showing the effect of guide block displacement under the force applied in FIG. 39;

FIG. 42 is a graph illustrating the effect of the force applied to the bolt in the force applying condition of FIG. 39;

FIG. 43 is a graph showing the effect of bolt displacement under the force applied in FIG. 39;

in the figure:

1. an unlocking frame;

2. a left stringer; 21. triangular plates; 22. lightening holes; 23. a fixed seat;

3. a right stringer;

4. a front beam; 41. a lower wing plate;

5. a rear beam;

6. a battery assembly; 61. a support pillar; 62. a positioning column;

7. a locking frame; 71. a hook-shaped frame; 72. a primary back beam; 73. a strut bearing groove; 74. a vertical slot; 75. f, locking; 76. a main hook; 77. an auxiliary hook; 77a, a front leg; 77b, posterior lateral legs; 78. a base station; 79. a pressure spring; 710. cushion blocks; 711. a shock-absorbing through hole; 712. a shock-absorbing post; 713. adjusting the bolt; 714. a forearm; 715. a rear arm;

8. a hook-type auxiliary frame;

9. a sensor; 91. a probe; 92. a sensor mount; 93. a front end plate; 94. a rear end plate; 95. a sensor return spring; 96. an end hole; 97. an inner shell sleeve; 98. an adjusting sleeve; 99. a sliding plate;

10. a guide block; 101. a protective mounting plate; 102. an impact-resistant pad; 103. a collision avoidance block; 104. a protective cover; 105. a first bolt; 106. a coil spring;

11. inserting an electrical interface assembly;

12. a positioning sleeve; 121. an inverted V-shaped guide frame.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the embodiment.

As shown in fig. 1 to 7, a lightweight battery unlocking mechanism assembly includes an unlocking frame 1. The unlocking frame 1 comprises a left longitudinal beam 2 and a right longitudinal beam 3 which are parallel to each other. The front and rear ends of the left longitudinal beam 2 and the right longitudinal beam 3 are respectively connected and fixed by a front beam 4 and a rear beam 5, so that a quadrilateral frame structure is integrally formed. In use, the battery assembly 6 is mounted within the quadrilateral frame structure, whereby the quadrilateral frame structure is utilized to surround and secure the battery assembly 6.

Since the frame structure is formed to fittingly surround the battery assembly 6, in some embodiments, one end of the battery assembly 6 is narrowed relative to the rest, but the thickness is increased to accommodate system structures other than the battery in the battery assembly 6, so that in this embodiment, in order to enhance the support of this portion, the rear end portions of the left and right side members 2, 3 are bent inward to form an inward-contracting structure fitting the shape of the battery assembly 6, and a hook-type auxiliary frame 8 is additionally provided on the inner side of this portion, and the support of this portion is done in cooperation with a locking mechanism.

The locking mechanism for supporting the battery assembly 6 in this embodiment is a plurality of locking brackets 7 mounted on the inner side surfaces of the left longitudinal beam 2 and the right longitudinal beam 3. The quantity and the position of locking frame 7 set up according to battery assembly 6's specific model and size, and in this embodiment, battery assembly 6 is compact car adaptation model, therefore only need three locking frame 7 to lock on every side. Besides the hook-shaped auxiliary frames 8 arranged at the rear end parts of the left longitudinal beam 2 and the right longitudinal beam 3, two hook-shaped auxiliary frames 8 are also arranged at the inner side surfaces of the front ends of the left longitudinal beam 2 and the right longitudinal beam 3, so that the two sides of the battery assembly 6 are uniformly and completely supported.

As shown in fig. 7 to 14, the specific structure of the locking frame 7 is as follows:

the locking frame 7 comprises a hook frame 71, and the main body structure of the hook frame 71 is a main back beam 72. The front arms 714 of the primary back beam 72 are bent downward a distance and then bent back a distance. The rear arm 715 of the main back beam 72 is also bent downward to form the other side wall of the post receiving slot 73, and finally an L-shaped post receiving slot 73 is formed below the main back beam 72 for receiving and supporting the support post 61 at the side of the battery assembly 6.

The main back beam 72 is provided with a vertical slot 74. An F-lock 75 is hinged in the vertical slot 74. Specifically, the F-lock 75 includes a main L-shaped hook 76 fastened above the hook frame 71, and a secondary hook 77 located in the middle of the F-lock 75 and extending downward, in this embodiment, the lower end of the secondary hook 77 extends to the front and rear sides to form a front leg 77a and a rear leg 77 b. The front leg 77a extends through the vertical slot 74 into the support post receiving slot 73 to form a movable catch for blocking the support post receiving slot 73, thereby locking the support post 61 at the side of the battery assembly 6 in the support post receiving slot 73. The forward-inclined configuration of the lower end of the front leg 77a prevents the support post 61 from being pushed out of the gap between the post bearing groove 73 and the lower end of the front leg 77a, improving the locking reliability of the front leg 77 a. The rear side leg 77b is hinged in the vertical slot 74 of the main back beam 72. In order to reset the front end of the main hook 76, in this embodiment, the rear end of the main back beam 72 extends backward out of the base 78, and the rear end of the main hook 76 also extends above the base 78, and a compression spring 79 accommodating space is formed between the base 78 and the rear end of the main back beam.

When the device is used, the rear end of the main hook 76 is lifted by the pressure spring 79, the front end of the main hook 76 is pressed and buckled on the main back beam 72 by taking the hinge pivot as a rotation center, the auxiliary hook 77 is pressed into the vertical groove 74, and the normally closed blocking of the auxiliary hook 77 on the strut bearing groove 73 is realized. When it is necessary to quickly mount the battery assembly 6 in the lock frame 7, the support post 61 is moved up to the front side branch 77a along the post bearing groove 73 and the front side branch 77a is lifted up, at which time the compression spring 79 is compressed. After the front leg 77a moves up to the corner position of the support bearing groove 73, the front leg 77a moves forward and enters the foremost end of the support bearing groove 73, at this time, the support post 61 has released the jacking of the front leg 77a, the front leg 77a returns under the action of the compression spring 79, and the exit path of the support post 61 is blocked, so that the support post 61 and the battery assembly 6 are locked. When the locking frame 7 needs to be unlocked, the main hook 76 is jacked up by using a jacking mechanism on the battery lifting platform, so that the auxiliary hook 77 is pushed out of the support bearing groove 73, the battery assembly 6 is pushed backwards, the support column 61 can be moved to the corner of the support bearing groove 73, and then the battery assembly 6 can be dismounted by downwards taking off the battery assembly 6.

In the above embodiment, since the movable locking structure embedded in the main back beam 72 is adopted, all the structures are skillfully integrated on the premise of occupying the smallest lateral space as possible. By adopting the scheme of reducing the transverse size of the equipment, the space can be reserved for the battery assembly 6 as much as possible in the reserved space fixed by the automobile chassis so as to improve the electric storage capacity and meet the actual market demand of long-term endurance of the automobile, which is one of the cores of the sale and sale points of pure electric automobiles.

Further, in order to better realize the complete support of the battery assembly 6 by the unlocking frame 1, the following supplementary technical scheme is also needed.

In order to realize the movement of moving the support post 61 upward to the uppermost part of the post receiving groove 73 forward or retreating backward when unlocked, in the present embodiment, a U-shaped catch is provided on the battery lifting platform, and the hook-shaped auxiliary frame 8 is configured to match the U-shaped catch. During the use, the U type card holds in the palm and follows battery lift platform and shifts up to the card is in the hook-shaped auxiliary frame 8 outside, and support column 61 moves up from pillar bearing groove 73 opening part this moment, then the U type card holds in the palm and drives support column 61 and remove to foremost from pillar bearing groove 73 corner, and the shutoff is reset by the auxiliary hook 77 that lifts this moment. When unlocking, the U-shaped clamp support moves towards the hook-shaped auxiliary frame 8 to realize clamping, and at the moment, the jacking mechanism on the battery lifting platform moves to the position of the main hook 76 to jack up the main hook 76. When the U-shaped clip holder is completely engaged with the hook-shaped auxiliary frame 8, the auxiliary hook 77 is just completely withdrawn from the supporting column bearing groove 73, a backward moving path of the supporting column 61 is reserved, then the U-shaped clip holder drives the hook-shaped auxiliary frame 8 and the whole battery assembly 6 to move backward, then the U-shaped clip holder moves downward, so that the supporting column 61 moves backward to the corner of the supporting column bearing groove 73, and then the U-shaped clip holder moves downward to separate from the supporting column bearing groove 73. In this process, the jack mechanism always supports the main hook 76 until the support post 61 moves below the auxiliary hook 77.

In order to realize that the jacking mechanism always supports the main hook 76 in the backward movement process of the battery assembly 6, in the embodiment, the forward extension of the main hook 76 relative to the main back beam 72 is set to be greater than the transverse movement distance of the support column 61 in the support column bearing groove 73, so that the jacking mechanism can still always support the main hook 76 even if the jacking mechanism and the U-shaped clamping support move backward under the support of the same fixed platform.

A cushion block 710 is fixed at the foremost end inside the strut bearing groove 73, and a shock absorption through hole 711 extending to the front part of the main back beam 72 is arranged in the cushion block 710. And a damping column 712 is installed in the damping through hole 711 and used for limiting and damping the movement of the supporting column 61. The shock absorbing posts 712 extend slightly beyond the pad 710 to provide shock absorption. The limit of movement of the support post 61 can be adjusted simply and efficiently by replacing a different type of spacer 710.

In another possible embodiment, the damping columns 712 are replaced by adjusting bolts 713 and are installed in the front end downward bending portions of the cushion blocks 710 and the main back beam 72 in a threaded manner, one end of each adjusting bolt 713 extends out of the front end downward bending portion of the main back beam 72 and is provided with a cross groove, and the position of the cushion blocks 710 in the column bearing grooves 73 can be adjusted by rotating the adjusting bolts 713, so that the moving limit of the supporting columns 61 can also be adjusted.

In order to facilitate the battery assembly 6 to better enter the unlocking frame 1 from the lower part and avoid the rigid impact between the locking frame 7 and the battery assembly 6, in the embodiment, a chamfer avoiding structure is arranged on the edge of the lower end of the locking frame 7 close to the inner side surface.

In another possible embodiment, a tension spring is provided below the primary hook 76 at a position on the front side of the secondary hook 77. One end of the tension spring is connected with the main hook 76, and the other end of the tension spring is connected with the main back beam 72, so that the front end of the main hook 76 is pulled downwards, and the auxiliary hook 77 is pulled into the strut bearing groove 73 under the normal state.

In another possible embodiment, the front end of the main hook 76 may be hinged to the main back beam 72, and the rear end of the main hook 76 extends a distance relative to the main back beam 72 for engaging with a jacking mechanism to jack up the rear end of the main hook 76, so as to achieve the purpose of flexibly withdrawing the auxiliary hook 77 from the pillar carrying groove 73. Accordingly, a return tension spring is provided between the middle rear portion of the main hook 76 and the main back beam 72, and the tension spring pulls the sub-hook 77 into the stay bearing groove 73 in a natural state.

In another possible embodiment, the rear end of the main hook 76 is hinged to the main back beam 72, and a return tension spring is provided between the front or middle portion of the main hook 76 and the main back beam 72, and naturally pulls the auxiliary hook 77 into the strut receiving groove 73.

In another possible embodiment, the auxiliary hook 77 extends into the supporting post carrying groove 73 by looping around one side of the main back beam 72, and in order to avoid the auxiliary hook 77 moving upward to the extreme position to block the exit path of the supporting post 61, in this embodiment, an avoiding groove is formed upward at the corner of the supporting post carrying groove 73. In use, when the F-lock 75 is pushed upward by a force, the auxiliary hook 77 is lifted back into the escape groove, which is the maximum position where the auxiliary hook 77 is lifted, and then the support post 61 can be smoothly withdrawn along the post bearing groove 73. Although the transverse size of the locking frame 7 needs to be slightly sacrificed due to the arrangement of the structure, the structural strength of the main back beam 72 can be ensured, and the locking frame 7 formed by assembling the solid main back beam 72 and other parts can reduce the processing difficulty and save the material cost.

With respect to the foregoing embodiment, it should be further explained that the overall structure of the hook type auxiliary frame 8 used in cooperation with the locking frame 7 is substantially the same as that of the main back beam 72, except that the F-lock 75 is omitted, and the matching structural design for assembling the F-lock 75 is adopted. Because the hook-type auxiliary frame 8 does not need to be matched with the F lock 75, the hook-type auxiliary frame does not need to be processed into a hollow structure, and the processing cost can be obviously saved. In the above, in the case of such a demand, the solid main back beam 72 in this embodiment can be used as the hook-type auxiliary frame 8 in general, and the versatility of parts is further improved.

In another possible embodiment, there is a relative translational movement between the F-lock 75 and the hook-shaped frame 71. The main hook 76 of the F-lock 75 is connected to the main back beam 72 by a tension spring, the main hook 76 is attached to the main back beam 72 in a normal state, and the auxiliary hook 77 is located in the strut bearing groove 73. The main hook 76 protrudes with respect to the hook frame 71 by a length for cooperating with the lifting operation of the unlocking mechanism. When the lifting device is used, the lifting mechanism lifts the main hook 76, the auxiliary hook 77 stably moves upwards along a guide structure such as the vertical groove 74 and the like, and retreats from the support bearing groove 73 so as to release the locking of the support post 61.

Referring to fig. 15 and 16, in order to sense whether the movement of the supporting post 61 reaches the target position, in the present embodiment, the shock absorbing post 712 or the adjusting bolt in the shock absorbing through hole 711 of one of the hook type auxiliary frames 8 is removed to accommodate the probe 91 of the position sensor 9. In this embodiment, in order to facilitate the lead-out of the sensor 9, it is preferable that the hook-shaped auxiliary frame 8 at the forefront is used as a structure for cooperating with the sensor 9. Specifically, a sensor holder 92 is mounted on the front end of the hook type sub-frame 8, and the sensor holder 92 includes a front end plate 93 and a rear end plate 94. A sensor return spring 95 is mounted on the rear end surface of the front end plate 93. The rear end plate 94 is provided with an end hole 96 for the probe 91 to pass through, and an inner casing 97 is fixedly installed in the end hole 96. The rear end of the inner casing 97 is in threaded fit with an adjusting sleeve 98, and the outer surface of the adjusting sleeve 98 is provided with anti-skid threads. The rear end plate 94 is fixedly connected to a slide plate 99. The sliding plate 99 is provided with a dovetail groove, and the sliding plate 99 is slidably fitted to the dovetail rails on the inner side surfaces of the left longitudinal beam 2 and the right longitudinal beam 3 based on the dovetail groove. The front end plate 93 is fixedly mounted on the left and right longitudinal beams 2, 3 and fixed relative to the dovetail rail.

During use, the other end of the adjusting sleeve 98 is abutted against the hook-shaped auxiliary frame 8, the sensor 9 is installed between the front end plate 93 and the rear end plate 94, and the probe 91 of the sensor sequentially penetrates through the end hole 96, the inner casing sleeve 97, the adjusting sleeve 98 and the damping through hole 711. Based on the difference to the detection demand, need to change the length that probe 91 stretches through shock attenuation through-hole 711, at this moment, through rotation regulation cover 98, can promote back end plate 94 forward with the help of inner housing cover 97, and then drive sliding plate 99, sensor 9 and probe 91 move a section distance forward, and utilize sensor reset spring 95 to support and reset, with this change that realizes probe 91 extension length, the horizontal size of adaptation pillar bearing groove 73, also be convenient for realize carrying out hardware compensation to different model sensor 9 service errors. In addition, the elastic coefficient of the sensor return spring 95 is smaller than that of the elastic member for supporting the probe 91 by contraction, so that the influence of the contraction of the sensor return spring 95 on the reading of the sensor 9 during the normal use of the probe 91 is avoided.

In this embodiment, in order to avoid hard impact between the battery assembly 6 and the unlocking frame 1 due to the non-corresponding matching position when the battery assembly 6 is lifted into the unlocking frame 1, besides the chamfer avoiding structure provided at the lower end of the inner side surface of the locking frame 7, the guide block 10 is further provided on the battery assembly 6, as shown in fig. 17 to 20. Guide block 10 is including being used for installing protection mounting panel 101 on the battery assembly 6 support body, install protecting against shock pad 102 on the protection mounting panel 101, protecting against shock pad 102's the outside protrusion in middle part forms and avoids bumping block 103. The impact-proof pad 102 is covered with a protective cover 104, the middle of the protective cover 104 is provided with a hole structure for protruding the impact-proof block 103, and the protective cover 104 can cover the bolt head and other structures for fixing the impact-proof pad 102, so that the bolt head or the bolt head and other structures are prevented from being scraped with parts in the unlocking frame 1. The upper inner edge of the collision avoidance block 103 is set to be a large inclined plane for guiding the battery assembly 6 into the unlocking frame 1 more smoothly.

In another possible embodiment, bumper 103 is made of a rubber material. Further, in order to increase the shock absorbing performance of the impact block 103 at the time of impact, a coil spring 106 is fitted around the outside of the first bolt 105 to which the impact block 103 is attached, and the coil spring 106 is fitted in a bolt hole provided in the impact block 103. During the use, when avoiding colliding piece 103 collision unblock frame 1, avoid colliding piece 103 itself and adopt wear-resisting rubber material, have the shock attenuation concurrently, can provide fine side protection for battery assembly 6 in the actual service environment who frequently changes battery assembly 6. Meanwhile, a coil spring 106 is arranged between the collision avoidance block 103 and a first bolt 105 screwed on the battery assembly 6 at an interval, and the collision avoidance block 103 can have certain displacement and deformation relative to the battery assembly 6 by utilizing the buffering action of the coil spring 106, so that the heavy battery assembly 6 can be better and safely guided into the unlocking frame 1. Accordingly, a gap of less than 3mm may be left between the hole structure in the middle of the shield 104 and the protruding portion in the middle of the bump stop 103, so that the bump stop 103 is displaced appropriately.

In this embodiment, the middle of the front beam 4 is provided with the electrical plug interface assembly 11, and during assembly, in order to quickly and accurately match the plug socket of the battery assembly 6 with the electrical plug interface assembly 11 in the middle of the front beam 4, the front beam 4 needs to be provided with the positioning sleeve 12 matched with the hole shaft of the battery assembly 6. The outer end of the positioning sleeve 12 is provided with a chamfer for receiving the positioning column 62, and the positioning column 62 is fixedly arranged on the front end surface of the battery assembly 6. In practical use, the right longitudinal beam 3 and the locking frame 7 on the inner side surface of the left longitudinal beam 2 always block and limit the upward moving limit of the supporting column 61, so that the battery assembly 6 usually has no movement error in the vertical direction, but in the transverse direction, the battery assembly 6 may have assembly errors, because a certain gap is reserved between the right longitudinal beam 3 and the left longitudinal beam 2 for the battery assembly 6 to be smoothly placed into the unlocking frame 1, on the other hand, the volume of the battery assembly 6 needs to be considered in the use process, and due to the expansion and contraction effect and other factors, the change to a certain degree occurs. Due to the above-mentioned clearance, the battery assembly 6 may be more biased to the left or right at the beginning of the installation, so that the positioning post 62 on the battery assembly 6 cannot enter the chamfer of the positioning sleeve 12 at the initial position, which will cause the positioning sleeve 12 to become an obstacle during the forward installation of the battery assembly 6 and not play a role in positioning. In order to solve the above problem, in the present embodiment, an inverted V-shaped guide frame 121 is attached to an end portion of the positioning sleeve 12. When in use, the two side arms of the inverted V-shaped guide frame 121 extend downwards and are gradually opened. The positioning column 62 completely falls into the two side arms of the inverted-V-shaped guide frame 121 in the upward moving process and is gradually guided to the position opposite to the positioning sleeve 12, then the battery assembly 6 is pushed by the U-shaped clamping support to move forward, the positioning sleeve 12 is accurately guided with the positioning column 62, the socket on the battery assembly 6 is accurately matched with the plug-in interface assembly 11 in the middle of the front beam 4, and the rapid and safe loading of the battery assembly 6 is realized.

In this embodiment, the left longitudinal beam 2 and the right longitudinal beam 3 are both stamped into an L shape by using steel plates, and a plurality of sets of triangular plates 21 are welded at corners to be used as reinforcing rib plates. The locking frame 7, the hook-shaped auxiliary frame 8, the sensor fixing frame 92 and the like are all arranged on the vertical plates of the L-shaped left longitudinal beam 2 and the L-shaped right longitudinal beam 3. In order to reduce the weight of the unlocking frame 1, lightening holes 22 are formed in the horizontal plate, and the lightening holes 22 are positioned between the reinforcing rib plates at intervals.

Further, since the back beam 5 only plays a role of connection and is not a bearing member, the cross-sectional size of the back beam 5 is smaller than that of the left longitudinal beam 2 and the right longitudinal beam 3, and meanwhile, in order to ensure the structural strength of the back beam 5, the back beam 5 adopts an i-shaped cross section. Similarly, the front beam 4 has an i-shaped cross section. Furthermore, because the middle part of the front beam 4 needs to be provided with the plug-in interface assembly, the area of the middle part is large, and the plug-in interface assembly is easily deformed by the pressure of the battery assembly 6 during use, so that the matching of the connectors in the plug-in interface is influenced. Therefore, the lower wing plate 41 of the front beam 4 is a square tube, so as to further enhance the structural strength of the front beam 4, avoid the deformation of the front beam 4 and ensure the accurate assembly of the plug-in connector of the battery assembly 6.

In the first embodiment, a finite element analysis software is further adopted to perform modal analysis and static analysis on the data model structure of the unlocking frame 1, as shown in table 1:

materials: HC420 Unit System: mm is

TABLE 1 HC420 Material Performance parameters

The left longitudinal beam 2, the right longitudinal beam 3, the front beam 4 and the rear beam 5 of the unlocking frame 1 are made of the materials with the mechanical properties.

And the left longitudinal beam 2 and the right longitudinal beam 3 are 1400mm long, 140mm wide, 60mm high and 2.5mm thick according to the actual use condition. The back beam is 777mm long, 60mm high, and the plate thickness is 16 mm. The length of the front beam is 1045mm, the thickness of the plate is 16mm, the highest position of the middle part is 110mm, and the two sides are gradually reduced to 60 mm.

In order to comprehensively consider the accuracy of the model and save the calculation cost, the model is simplified by a small amount: a process round hole with a smaller diameter and a transition fillet are deleted, so that stress concentration is prevented; while important wells were retained for further analysis.

The whole model adopts hexahedron grids and tetrahedral grids. With the mesh sizes being 3mm and 5mm respectively.

1. Modal analysis

Boundary conditions: a plurality of fixing seats 23 fixedly mounted with the vehicle body are arranged above the left longitudinal beam 2 and the right longitudinal beam 3, two fixing seats 23 are also arranged on the front beam 4, and 6-degree-of-freedom full constraint is arranged on the fixing seats 23.

The first 6 modal data and characterization are shown in fig. 24-29.

When a vehicle runs, the excitation frequency from the road surface is generally 0-20 Hz, and the main vibration excitation frequency generally received by considering other excitation effects such as vibration of a transmission system, a vehicle body and a vehicle axle is less than 30 Hz. In practice, the low order modes are easily excited by the outside world, so that the excitation frequency is prevented from being close to or coincident with the low order natural frequency. The first 6 order modal results were selected in this example. Meanwhile, to ensure that the mechanical parts have resonance, the following conditions are generally ensured:

0.85f＞f_p

in the formula, f: the natural frequency of the part; f. of_p: the frequency of the excitation source.

TABLE 2 relationship between the natural frequency of the parts and the displacement of the unlocking frame under different constraint orders

The experimental data in table 2 were substituted into the formula: 0.85 × 51.183 ═ 43.5 > 30. No resonance occurs. Meanwhile, as shown in fig. 24 to 29, in the first 6 th-order mode, the displacement is about 1mm, so that the stability of the entire unlocking frame 1 is better.

2. Static analysis

The battery mass is 350kg in general, and the battery finally takes 1.5 times of load, namely the actual load is 5250N in consideration of certain safety. In this embodiment, there are three locking frames 7 on each side, five hook-shaped auxiliary frames 8, two hook-shaped auxiliary frames 8 are located on the front side of the left longitudinal beam 2 or the right longitudinal beam 3, two hook-shaped auxiliary frames 8 are located on the rear side of the left longitudinal beam 2 or the right longitudinal beam 3, and the remaining one configuration auxiliary frame is located on the corresponding side of the front beam 4. The load of 5250N is evenly distributed by a total of 16 frames on the two sides. While giving full restraint with 6 degrees of freedom to the fixed mounts 23 above the left and right longitudinal beams 2, 3. Specifically, as shown in fig. 30, the final displacement and force results are shown in fig. 30 to 32. As shown in the figure, the maximum stress of the unlocking frame 1 is 286.3MPa, which is far less than the yield strength of HC420 steel; meanwhile, the maximum deformation of the locking frame is only 2.781mm, and the deformation amount is small. Therefore, the stability and strength of the locking frame can be satisfied.

Second, stress analysis of the locking frame 7

Unit system: mm is

Steel material parameters of Table 345

The locking frame 7 adopts the materials in the table 3, and in order to comprehensively consider the accuracy of the model and save the calculation cost, the model is simplified by a small amount: parts that do not have a large impact on model stress are eliminated while preserving vital components for analysis.

The thickness of the main back beam of the hook-shaped frame is 15mm, the downward bending height of two ends of the main back beam is 50mm, and the length of the main part of the main back beam is 75 mm. The width of the strut bearing groove is 15mm, the length of the horizontal part is 40mm, and the vertical length is 30 mm. The pivot aperture for hinging the secondary hook, which is opened on the main back beam, is 10mm, and keeps a proper distance with the boundary of the main body. The vertical groove is 55mm long and 8mm wide.

The whole model adopts tetrahedral meshes. The mesh size is 2 mm.

Boundary conditions: and 6-degree-of-freedom full constraint is carried out on the bolt hole for fixing the locking frame 7.

Loading: a concentrated force of 1000N is applied to the locking frame 7, pointing inwards. The specific location is shown in fig. 34.

The resulting stress and deformation is shown in fig. 35 and 37.

As shown in the figure, the maximum stress of the locking frame 7 is 178.8MPa, which is smaller than the yield strength of HC 420; meanwhile, the maximum deformation is about 0.243mm, and the deformation is small. The strength requirement of the locking frame 7 can be met.

Thirdly, analyzing the stress of the guide block 10

HC420LA was used. The height of the protective cover 104 and the protective mounting plate 101 is 70mm, the width of the protective cover is 80mm, the material thickness of the protective cover is 2mm, and the hole for accommodating the collision avoidance block 103 in the middle is 35 mm multiplied by 45 mm. 4 sets of M4 bolts were used.

Model simplification and grid setting: since the bolt of the guide block 10 plays a role in moving and positioning, it is necessary to prevent the bolt from being broken by shearing force, so that the stress of the bolt is mainly analyzed.

1. In order to comprehensively consider the accuracy of the model and save the calculation cost, the model is simplified by a small amount: the part which can not generate larger influence on the stress of the model is deleted, the model is simplified, and meanwhile, the locking frame is simplified into a plate.

2. The whole model adopts tetrahedral mesh. The grid density of the bolts is 0.8mm, and the grid density of other parts is 4 mm. As shown in detail in fig. 38.

Boundary conditions: a full 6 degree of freedom constraint is imposed on the back of the guide block 10.

Loading: firstly, 1000N of leftward concentrated force is given to the guide block 10; then 1000N of concentrated force is given to the transmission member to the right. Specifically, as shown in fig. 39, the final force and displacement are shown in fig. 40 and 41.

From the above figure, the maximum stress of the entire guide shoe 10 is 9.576MPa, and the maximum displacement is less than 0.1 mm. Can realize that the damage does not occur in the process of bearing the force.

Meanwhile, based on the bolt stress and displacement cloud charts 42 and 43 on the guide block 10, the maximum stress of the bolt is 2.883MPa, the maximum displacement is less than 0.1mm, and the stability and the strength of the guide block 10 can be ensured.

In another possible embodiment, in order to reduce the total weight of the unlocking frame 1, realize lightweight support and meet the energy-saving and emission-reduction requirements of operating vehicles, the left longitudinal beam 2, the right longitudinal beam 3 and the front beam 4 are all replaced by rectangular tube structures, the embodiment is subjected to the similar experiments, the obtained experimental data verifies that the material thickness in the original embodiment is uniformly reduced, the left longitudinal beam and the right longitudinal beam of 2.5mm are changed into square tubes with the material thickness of 2mm, the rear beam and the front beam of 16mm are changed into square tubes with the material thickness of 2mm, and lightening holes are still formed, so that the total weight of the equipment is smaller than the weight of the unlocking frame 1 in the original embodiment, and the mechanical property can still meet the use requirements.

In the description of this patent, it is to be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "front", "rear", and the like, are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships shown in the drawings, and are used for convenience of description and simplicity of description only, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the patent.

In this patent, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which shall fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (1)

1. A light-weight battery unlocking mechanism assembly comprises an unlocking frame (1), wherein the unlocking frame comprises a left longitudinal beam (2) and a right longitudinal beam (3) which are parallel to each other, and the front end and the rear end of the left longitudinal beam (2) and the front end and the rear end of the right longitudinal beam (3) are respectively connected and fixed with a front beam (4) and a rear beam (5); the method is characterized in that:

the inner side surfaces of the left longitudinal beam (2) or/and the right longitudinal beam (3) are/is provided with a locking frame (7), and the locking frame (7) is used for fixing and bearing a battery assembly;

the locking frame (7) comprises a hook-shaped frame (71) and an F lock (75); the hook frame (71) comprises a main back beam (72); one end of the main back beam (72) is bent downwards for a certain distance and then bent reversely for a certain distance, so that a strut bearing groove (73) is formed below the main back beam (72); the other end of the main back beam (72) is bent downwards to form the other side wall of the strut bearing groove (73); an avoidance groove is formed in the upper part of the strut bearing groove (73); the F lock (75) comprises a main hook (76) positioned above the hook-shaped frame (71) and an auxiliary hook (77) positioned in the middle of the F lock (75); the end of the main hook (76) protrudes with respect to the main back beam (72) for engaging an unlocking mechanism; one side of the main hook (76) far away from the reverse bending section of the main back beam (72) is hinged with the main back beam (72), and a tension spring is arranged between one side of the main hook (76) close to the reverse bending section of the main back beam (72) and the main back beam (72); the auxiliary hook (77) bypasses one side of the main back beam (72) and extends into the support column bearing groove (73) in an encircling mode to form a movable buckle capable of plugging the support column bearing groove (73); the auxiliary hook (77) enables the F lock (75) to rotate relative to the hook-shaped frame (71) by virtue of a tension spring between the hook-shaped frame (71) and the F lock (75), so that the auxiliary hook (77) blocks or opens the strut bearing groove (73); when the F lock (75) is pushed upwards by force, the auxiliary hook (77) rises back to the avoiding groove, and the position is the limit position of the rising of the auxiliary hook (77).

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