CN213035688U - Power battery quick-change mechanism - Google Patents

Abstract

The utility model discloses a power battery quick change mechanism belongs to the electric automobile field, the utility model discloses a quick change mechanism includes the battery installation frame, be equipped with the chamber of placing the battery in the battery installation frame, the inboard top of placing the chamber is equipped with and is connected and blocks the inboard spacing mount of power battery with the car bottom plate, the outside of placing the chamber is equipped with the spacing pipe of prescribing a limit to the battery in placing the intracavity, the front end of battery installation frame is equipped with and drives spacing pipe lift pivoted drive transmission subassembly, the rear end of battery installation frame is equipped with supplementary spacing pipe lift pivoted driven rotating assembly, this battery quick change mechanism quality is lighter, moreover, the steam generator is simple in structure, and convenient for operation, good stability, it is more efficient fast.

Description

Power battery quick-change mechanism

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electric automobile field, concretely relates to power battery quick change mechanism.

[ background of the invention ]

The automobile is a common travel tool in life, the traditional automobile uses gasoline or diesel oil as a power source, the strength is durable, but a large amount of tail gas is discharged, so that the serious pollution is caused, along with the attention of people on environmental problems, the finding of a green and environment-friendly power system for the automobile becomes the most concerned problem in the automobile research field, an electric automobile which uses a vehicle-mounted power supply as power and runs by using motor-driven wheels is favored due to small influence on the environment, along with the market popularization and the increase of production scale of new energy electric automobiles, the quality requirements and the performance requirements on the electric automobile are higher and higher, the speed and the endurance are mainly focused, the endurance of the electric automobile is determined by a power battery, the power battery is traditionally fixed on a chassis of the electric automobile by bolts and the like, when the battery is replaced when damaged or insufficient in endurance, the battery can be replaced after all the fixing bolts are dismantled, the disassembly and assembly process is complicated, the replacement difficulty is high, the required time is long, the replacement efficiency is low, and the electric automobile is inconvenient to use, so that the design and development of the quick-change device for the automobile power battery are very necessary.

The invention patent with the application number of 201810908182.0 discloses a device for quickly disassembling a battery pack of an automobile, which comprises a lower frame and an upper frame connected with a bottom plate of the whole automobile, wherein a placing cavity for placing the battery pack is arranged in the lower frame, a fixed rod and a movable shaft sleeve are arranged on the lower frame, a limiting rod capable of limiting the battery pack in the placing cavity is arranged on the upper frame, the movable shaft sleeve is sleeved on the fixed rod and can slide and be positioned on the fixed rod, one end of the movable shaft sleeve is fixedly connected with the upper frame, one end of the fixed rod is connected with the lower frame, the lower frame is driven to move downwards relative to the upper frame by downwards moving the shaft sleeve, and then the limiting rod is matched with the movement, so that the battery pack is replaced, the longitudinal displacement of the upper frame is realized by moving the relative position between the shaft sleeve and the fixed rod, the quick disassembly of the battery pack is realized, and, however, the quick-release device comprises an upper frame and a lower frame, the structure is complex, the number of parts is large, the weight of the whole electric automobile is increased, repeated lifting is needed in the process of replacing and installing the battery pack, the process is still complicated, the weight of the battery pack and the lower frame is large, the lifting process can be completed only by providing large power, more energy is consumed, the battery pack is frequently lifted or placed at the bottom of the electric automobile for a long time and only pulled by a fixed rod and a movable shaft sleeve, the matching strength of the fixed rod and the movable shaft sleeve is limited, the battery pack is easy to damage and clamp, the quick replacement of the battery pack cannot be completed, the whole quick-release device needs to be replaced, the replacement efficiency is seriously influenced.

In order to overcome the defects of the invention patents, the company develops and uses a quick-change mechanism of the automobile power battery,

[ summary of the invention ]

The utility model aims to solve the technical problem that overcome not enough among the prior art, provide a quality is lighter, simple structure, convenient operation's power battery quick change mechanism.

Solve above-mentioned technical problem, utility model adopts following technical scheme:

the utility model provides a power battery quick change mechanism, includes the battery installation frame, be equipped with the chamber of placing the battery in the battery installation frame, the inboard top of placing the chamber is equipped with and is connected and block the inboard spacing mount of power battery with the car bottom plate, the outside of placing the chamber is equipped with and prescribes a limit to the battery in placing the spacing pipe of intracavity, the front end of battery installation frame is equipped with and drives spacing pipe lift pivoted drive transmission assembly, the rear end of battery installation frame is equipped with supplementary spacing pipe lift pivoted driven rotating assembly.

Adopt utility model's beneficial effect:

1. when the battery needs to be replaced, the old battery is firstly disassembled, the driving transmission assembly is started to drive the limiting pipe to rotate and rise, limitation on the outer side of the battery is removed, the power battery is pulled out by hands, when a new battery needs to be installed, the new battery is pushed into the battery installation frame, the driving transmission assembly is started to reversely drive the limiting pipe to rotate and fall to the lowest point, the outer side of the battery is clamped to limit the battery, compared with a quick-release device of an automobile battery pack in the prior art, the battery installation frame does not need to be driven to ascend and descend, the position of the battery installation frame does not need to be changed, battery replacement can be completed only by rotating the limiting pipe, energy consumption is reduced, operation is convenient, and replacement efficiency is improved.

2. Compared with the prior art, the quick-change mechanism in the scheme has a simpler structure, the limiting fixing frame is only arranged above the inner side of the placing cavity, the size is reduced, and the mass of the whole quick-change mechanism is reduced, so that the gravity of the whole vehicle is reduced, the energy consumption is reduced, and the battery heat dissipation is facilitated.

3. Spacing mount in this scheme can enough realize well that fix battery installation frame is whole firmly on the vehicle floor, can block the battery inboard again, makes the battery install for a long time in the car bottom, also can not be because of jolting and luffing motion or drop of car, has increased the stability of battery, also prevents that the battery from striking vehicle floor.

4. Be equipped with runner assembly at the front end and the rear end of spacing pipe, guarantee that the rotation of spacing pipe is more smooth, prevent that both ends from rotating asynchronous, take place torsional deformation, improved quick change mechanism's stability, increased the life of spacing pipe.

Preferably, the driving transmission assembly comprises a push rod motor and a transmission rod connected with a push rod of the push rod motor, one end, far away from the push rod motor, of the transmission rod is hinged to the front turning hinge, a front rotating shaft perpendicular to the front turning hinge is fixedly arranged on the front turning hinge, a first gear is arranged at one end, far away from the front turning hinge, of the front rotating shaft, and a first toothed sector meshed with the first gear is arranged at the front end of the limiting pipe.

The push rod motor is used as a driver, when a battery is replaced, the push rod motor is started to rotate, the push rod drives the push rod to stretch and push the push-pull transmission rod, the front turning hinge rotates to drive the first gear on the front rotating shaft to rotate, and the first gear sector meshed with the first gear is driven to rotate, so that the limiting pipe is driven to rotate and lift.

Preferably, battery installation frame front end is equipped with preceding mounting bracket, the preceding pivot is kept away from the one end of preceding upset hinge and is connected in the front on the mounting bracket to mounting bracket rotates before relative, be equipped with first round pin axle on the preceding mounting bracket, first round pin epaxial is equipped with first axle sleeve, first axle sleeve is connected with spacing pipe front end through preceding fixed connection board, first sector fixed connection is on first axle sleeve.

Through preceding mounting bracket, have the effect of better firm support to drive transmission assembly, adopt above-mentioned structure simultaneously, make the cooperation rotation that first gear and first sector can be better.

As preferred, driven rotating assembly establishes at the installation frame rear side, driven rotating assembly is including back upset hinge, fixed being equipped with on the back upset hinge with back upset hinge vertically back rotation axis, the one end that back upset hinge was kept away from to the back rotation axis is equipped with the second gear, battery installation frame rear end is equipped with the back mounting bracket, the one end that back upset hinge was kept away from to the back rotation axis is connected on the mounting bracket of back to relative back mounting bracket rotates, be equipped with the second round pin axle on the back mounting bracket, the epaxial second shaft cover that is equipped with of second round pin, the second shaft cover is connected with spacing pipe rear end through back fixed connection board, second gear fan fixed connection is on the second shaft cover.

Adopt above-mentioned structure, when fixing on the vehicle floor, spacing pipe carries out limiting displacement to the battery outside, when needing the dismouting, spacing pipe plays driven effect again, preceding upset hinge is with torque conduction to spacing pipe, use the gear train the same with the front end in the rear side, it is preceding to have guaranteed, the synchronous rotation of rear end, spacing pipe rigidity is great simultaneously, make torque conduction to the upset hinge after better, make the lift of spacing pipe more target in place, it is faster more quick, reduce the deflection that the moment of torsion conduction produced to the rear end, the life of battery quick change mechanism has been prolonged, the cooperation of second gear and second sector, mechanical stability is better.

As preferred, driven rotating assembly establishes at the installation frame rear side, driven rotating assembly is including back upset hinge, fixed being equipped with on the back upset hinge with back upset hinge vertically back rotation axis, the rear end of spacing pipe is equipped with the back fixed connection board, back rotation axis passes back fixed connection board and the internal rotation of back fixed connection board, the cover has the torsional spring on the back rotation axis, the one end of torsional spring is fixed and is close to the one end of back upset hinge at the back rotation axis, the other end of torsional spring is fixed on the back fixed connection board.

The rear end of spacing pipe sets up the torsional spring, has the cushioning effect to the driven rotation of spacing pipe, reduces the torsion difference at spacing pipe both ends, reduces the deflection that the moment of torsion conduction produced to the rear end, and the torsional spring structure is simpler, and the cost is lower.

As preferred, place the chamber for placing of two symmetries settings, two are placed and are equipped with the gangbar between the chamber, be equipped with the driving plate on the push rod of push rod motor, the transfer line articulates on the driving plate, the antetheca that the battery installation frame was passed to the front end of gangbar is connected with the driving plate is perpendicular, the rear end of gangbar is connected with the driven plate with the back wall of wearing out the battery installation frame, it has the driven lever to articulate on the driven plate, the one end that the driven plate was kept away from to the driven lever is articulated with the back hinge that overturns.

Utilize the push rod motor to drive the removal of initiative board, drive the transfer line and remove, drive the gangbar rotation that is located the rotation center simultaneously to drive the transfer line and remove, through the transfer line removal drive back rotation hinge's rotation again, the effect through gear train or torsional spring drives the lift of spacing pipe rear end, through the transmission of gangbar, makes the preceding, the back both ends of spacing pipe receive initiative torsion effect simultaneously, and synchronization action, it is easier to go up and down, and difficult emergence is out of shape.

Preferably, the limiting pipe is provided with a turning plate, the turning plate is lifted and opened along with the lifting and rotating of the limiting pipe, and the turning plate is fallen and closed along with the falling and rotating of the limiting pipe.

The turnover plate has larger blocking area to the battery, plays a further limiting blocking role, and prevents the battery from sliding down from the limiting pipe in the normal use process.

Preferably, the limiting fixing frame comprises a longitudinal connecting pipe connected with the front end and the rear end of the battery mounting frame, and two or more transverse connecting pipes are arranged between the longitudinal connecting pipe and the inner side wall of the placing cavity.

Adopt above-mentioned setting to make the gravity of battery and battery installation frame pass through before spacing mount and the battery installation frame, the tie point of rear end passes to vertical connecting pipe and disperses on vertical connecting pipe, horizontal connecting pipe is given with horizontal connecting pipe's tie point dispersion to the vertical connecting pipe of rethread, make whole spacing mount atress more even, be favorable to stress dispersion, prevent stress concentration, the bearing effect is better, hollow out construction is favorable to the heat dissipation of battery simultaneously.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The utility model is further described with the following drawings:

fig. 1 is a schematic perspective view of a battery mounting frame with front and rear walls removed according to an embodiment of the present invention.

Fig. 2 is a schematic view of another perspective structure of the first embodiment of the present invention, which is used to remove the front and rear walls of the battery mounting frame.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an enlarged view of fig. 2 at B.

Fig. 5 is a partial schematic view of a driven rotation assembly according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of a three-dimensional structure according to an embodiment of the present invention.

Fig. 7 is a schematic perspective view of another perspective view according to an embodiment of the present invention.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, those skilled in the art can obtain other embodiments without creative efforts, and all of them belong to the protection scope of the utility model.

In the following description, the terms such as "inner", "outer", "upper", "lower", "left", "right", etc., which indicate orientations or positional relationships, are used for convenience in describing embodiments and simplifying descriptions, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

The first embodiment is as follows:

as shown in fig. 1 to 4, a power battery quick-change mechanism, including battery installation frame 1, be equipped with the chamber 2 of placing the battery in the battery installation frame 1, the inboard top of placing chamber 2 is equipped with and is connected and blocks the inboard spacing mount 3 of power battery with the car bottom plate, the outside of placing chamber 2 is equipped with and prescribes a limit to the battery in placing chamber 2 spacing pipe 4, the front end of battery installation frame 1 is equipped with drives spacing pipe 4 lift pivoted drive assembly 5, the rear end of battery installation frame 1 is equipped with supplementary spacing pipe 4 lift pivoted driven rotating assembly 6.

The working principle of the power battery quick-changing mechanism in the embodiment is as follows: when the battery needs to be replaced, the old battery is detached firstly, the driving transmission assembly 5 is started to drive the limiting pipe 4 to rotate and rise, the limitation on the outer side of the battery is removed, the power battery is pulled out by hands, and when a new battery needs to be installed, the new battery is pushed into the battery installation frame 1, the driving transmission assembly 5 is started to reversely drive the limiting pipe 4 to rotate and fall to the lowest point, and the outer side of the battery is clamped to limit the battery. This battery quick change mechanism need not change the position of battery installation frame 1, only needs to rotate spacing pipe 4 and can accomplish the battery and change, reduces energy consumption, and convenient operation has improved change efficiency. The front end and the rear end of the limiting pipe 4 are provided with rotating assemblies, so that the rotation of the limiting pipe 4 is ensured to be smoother, the rotation of the two ends is kept synchronous, and the torsional deformation is prevented; spacing mount 3 structure is simpler, and spacing mount 3 only is established in the inboard top of placing chamber 2, and the volume reduces, has alleviateed the quality of whole quick change mechanism, can enough realize well fixing battery installation frame 1 wholly firmly on the vehicle floor, can block the battery inboard again, when making the battery install in the vehicle floor for a long time, also can not be because of jolting and the luffing motion of car or droing, has increased the stability of battery, also prevents that the battery from striking vehicle floor.

When spacing mount 3 played the connection effect, still need bear the weight of battery, in order to prevent stress concentration, as shown in fig. 1, spacing mount 3 is before connecting battery installation frame 1, the longitudinal joint pipe 31 of rear end, longitudinal joint pipe 31 and place and be equipped with two and above transverse joint pipe 32 between the inside wall in chamber 2, the gravity of battery and battery installation frame 1 passes through spacing mount 3 and battery installation frame 1 before, the tie point of rear end passes to longitudinal joint pipe 31 and disperses on longitudinal joint pipe 31, the tie point dispersion of rethread longitudinal joint pipe 31 and transverse joint pipe 32 gives transverse joint pipe 32, make whole spacing mount 3 atress more even, be favorable to the stress dispersion, the bearing effect is better, hollow out construction is favorable to the heat dissipation of battery simultaneously.

As shown in fig. 2 and fig. 3, in the present embodiment, the driving transmission assembly 5 includes a push rod motor 51 and a transmission rod 52 connected to a push rod of the push rod motor 51, one end of the transmission rod 52 far away from the push rod motor 51 is hinged to a front turning hinge 53, a front rotation shaft 54 perpendicular to the front turning hinge 53 is fixedly disposed on the front turning hinge 53, one end of the front rotation shaft 54 far away from the front turning hinge 53 is provided with a first gear 55, a front end of the limiting tube 4 is provided with a first toothed sector 41 engaged with the first gear 55, in order to have a better effect of stably supporting the driving transmission assembly 5, the front end of the battery mounting frame 1 is provided with a front mounting frame 7, one end of the front rotation shaft 54 far away from the front turning hinge 53 is connected to the front mounting frame 7 and rotates relative to the front mounting frame 7, the front mounting frame 7 is provided with a first pin 8, the first pin 8 is provided with a first bushing 9, the first bushing 9 is connected to the front end, the first sector gear 41 is fixedly connected to the first sleeve 9, and the first gear 55 and the first sector gear 41 can rotate in a better matching manner by adopting the structure.

When the battery is replaced, the push rod motor 51 is started, the push rod motor 51 rotates, the push rod pushes and pulls the transmission rod 52 in a telescopic mode, the front overturning hinge 53 rotates to drive the first gear 55 on the front rotating shaft 54 to rotate, the first gear sector 41 meshed with the first gear 55 is driven to rotate, and therefore the limiting pipe 4 is driven to rotate and lift.

As shown in fig. 2 and 4, the driven rotating assembly 6 is arranged at the rear side of the mounting frame, the driven rotating assembly 6 includes a rear turning hinge 61, a rear rotating shaft 62 perpendicular to the rear turning hinge 61 is fixedly arranged on the rear turning hinge 61, a second gear 63 is arranged at one end of the rear rotating shaft 62 far away from the rear turning hinge 61, the rear mounting frame 10 is arranged at the rear end of the battery mounting frame 1, one end of the rear rotating shaft 62 far away from the rear turning hinge 61 is connected to the rear mounting frame 10 and rotates relative to the rear mounting frame 10, a second pin shaft 8a is arranged on the rear mounting frame 10, a second shaft sleeve 9a is arranged on the second pin shaft 8a, the second shaft sleeve 9a is connected with the rear end of the limiting pipe 4 through a rear fixing connecting plate 44, and the second gear 43 is fixedly connected.

When fixing on the vehicle floor, spacing pipe 4 carries out limiting displacement to the battery outside, when needing the dismouting, spacing pipe 4 plays driven effect again, preceding upset hinge 53 is with torque conduction to spacing pipe 4, use the gear train the same with the front end in the rear side, guaranteed preceding, the synchronous rotation of rear end, spacing pipe 4 rigidity is great simultaneously, make torque conduction to back upset hinge 61 better, make the lift of spacing pipe 4 more target in place, it is faster more quick, reduce the deflection that torque conduction produced to the rear end, the life of battery quick change mechanism has been prolonged, the cooperation of second gear 63 and second gear sector 43, mechanical stability is better.

It should be noted that, in other embodiments, the gear assembly is not limited to the matching manner of the gear and the sector gear, and may also be a gear and a gear matching manner, and the like, as long as the gear meshing transmission can be realized, all fall within the protection scope of the utility model.

In order to increase the blocking area of the battery, the turning plate 11 is arranged on the limiting pipe 4, the turning plate 11 is lifted and opened along with the lifting and rotating of the limiting pipe 4, the turning plate 11 is descended and closed along with the descending and rotating of the limiting pipe 4, the turning plate 11 plays a further limiting and blocking role, and the battery is prevented from sliding down from the limiting pipe 4 in the normal use process.

Example two

As shown in fig. 5, the present embodiment is different from the first embodiment in that the driven rotating assembly 6 includes a rear flipping hinge 61, a rear rotating shaft 62 perpendicular to the rear flipping hinge 61 is fixedly disposed on the rear flipping hinge 61, a rear fixing connection plate 44 is disposed at the rear end of the limiting tube 4, the rear rotating shaft 62 passes through the rear fixing connection plate 44 and rotates in the rear fixing connection plate 44, a torsion spring 12 is sleeved on the rear rotating shaft 62, one end of the torsion spring 12 is fixed at one end of the rear rotating shaft 62 close to the rear flipping hinge 61, and the other end of the torsion spring 12 is fixed on the rear fixing connection plate 44.

The torsion spring 12 is used for replacing a gear assembly in the driven rotating assembly 6, the torsion spring 12 is simpler in structure and lower in cost, the torsion spring 12 has a buffering effect on the driven rotation of the limiting pipe 4, the torsion difference at two ends of the limiting pipe 4 is reduced, and the deformation generated when the torque is transmitted to the rear end is reduced.

EXAMPLE III

As shown in fig. 6 and 7, the difference between the present embodiment and the first and second embodiments is that the placing cavities 2 are two symmetrically disposed placing cavities 2, a linkage rod 13 is disposed between the two placing cavities 2, a driving plate 14 is disposed on a push rod of a push rod motor 51, a transmission rod 52 is hinged on the driving plate 14, a front end of the linkage rod 13 penetrates through a front wall of the battery mounting frame 1 and is vertically connected with the driving plate 14, a driven plate 15 is connected to a rear end of the linkage rod 13 and a rear wall penetrating through the battery mounting frame 1, a driven rod 16 is hinged on the driven plate 15, and one end of the driven rod 16, which is far away from the driven plate 15, is hinged with a rear turning hinge 61.

The working principle of the structure is as follows: the push rod motor 51 is used for driving the driving plate 14 to move, driving the transmission rod 52 to move, and simultaneously driving the linkage rod 13 positioned at the rotation center to rotate, so as to drive the transmission rod 52 to move, drive the rear turnover hinge 61 to rotate through the movement of the transmission rod 52, and drive the lifting of the rear end of the limiting pipe 4 through the action of the gear set or the torsion spring 12. The front end and the rear end of the limiting pipe 4 are simultaneously under the action of active torque force through the transmission of the linkage rod 13, and the limiting pipe is synchronous in action, easier to lift and not easy to deform.

The above description is only for the embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the description in the above embodiments and the accompanying drawings. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the claims.

Claims (8)

1. The utility model provides a power battery quick change mechanism, includes the battery installation frame, be equipped with the chamber of placing the battery in the battery installation frame, its characterized in that, the inboard top of placing the chamber is equipped with and is connected and blocks the inboard spacing mount of power battery with the car bottom plate, the outside of placing the chamber is equipped with and prescribes a limit to the spacing pipe of placing the intracavity with the battery, the front end of battery installation frame is equipped with and drives spacing pipe lift pivoted drive transmission assembly, the rear end of battery installation frame is equipped with supplementary spacing pipe lift pivoted driven rotating assembly.

2. The power battery quick-change mechanism according to claim 1, wherein the driving transmission assembly comprises a push rod motor and a transmission rod connected with a push rod of the push rod motor, one end of the transmission rod, which is far away from the push rod motor, is hinged with a front turning hinge, a front rotating shaft perpendicular to the front turning hinge is fixedly arranged on the front turning hinge, one end of the front rotating shaft, which is far away from the front turning hinge, is provided with a first gear, and the front end of the limiting pipe is provided with a first sector meshed with the first gear.

3. The power battery quick-changing mechanism according to claim 2, wherein a front mounting frame is arranged at the front end of the battery mounting frame, one end, far away from a front overturning hinge, of the front rotating shaft is connected to the front mounting frame and rotates relative to the front mounting frame, a first pin shaft is arranged on the front mounting frame, a first shaft sleeve is arranged on the first pin shaft and connected with the front end of the limiting pipe through a front fixing connecting plate, and the first sector gear is fixedly connected to the first shaft sleeve.

4. The power battery quick-change mechanism according to claim 3, wherein the driven rotating assembly is arranged at the rear side of the installation frame and comprises a rear overturning hinge, a rear rotating shaft perpendicular to the rear overturning hinge is fixedly arranged on the rear overturning hinge, a second gear is arranged at one end, away from the rear overturning hinge, of the rear rotating shaft, a rear installation frame is arranged at the rear end of the battery installation frame, one end, away from the rear overturning hinge, of the rear rotating shaft is connected to the rear installation frame and rotates relative to the rear installation frame, a second pin shaft is arranged on the rear installation frame, a second shaft sleeve is arranged on the second pin shaft and connected with the rear end of the limiting pipe through a rear fixed connection plate, and the second gear fan is fixedly connected to the second shaft sleeve.

5. The power battery quick-change mechanism according to claim 3, wherein the driven rotating assembly is arranged at the rear side of the mounting frame and comprises a rear turnover hinge, a rear rotating shaft perpendicular to the rear turnover hinge is fixedly arranged on the rear turnover hinge, a rear fixed connecting plate is arranged at the rear end of the limiting pipe, the rear rotating shaft penetrates through the rear fixed connecting plate and rotates in the rear fixed connecting plate, a torsion spring is sleeved on the rear rotating shaft, one end of the torsion spring is fixed at one end of the rear rotating shaft close to the rear turnover hinge, and the other end of the torsion spring is fixed on the rear fixed connecting plate.

6. The power battery quick-changing mechanism according to claim 4 or 5, wherein the placing cavities are two symmetrically arranged placing cavities, a linkage rod is arranged between the two placing cavities, a driving plate is arranged on a push rod of the push rod motor, the transmission rod is hinged to the driving plate, the front end of the linkage rod penetrates through the front wall of the battery mounting frame and is vertically connected with the driving plate, a driven plate is connected to the rear end of the linkage rod and the rear wall penetrating through the battery mounting frame, a driven rod is hinged to the driven plate, and one end, away from the driven plate, of the driven rod is hinged to the rear overturning hinge.

7. The power battery quick-change mechanism according to claim 1, wherein a turning plate is arranged on the limiting pipe, the turning plate is lifted and opened along with the lifting and rotating of the limiting pipe, and the turning plate is lowered and closed along with the lowering and rotating of the limiting pipe.

8. The power battery quick-changing mechanism according to claim 1, wherein the limiting fixing frame comprises a longitudinal connecting pipe connected with the front end and the rear end of the battery mounting frame, and two or more transverse connecting pipes are arranged between the longitudinal connecting pipe and the inner side wall of the placing cavity.

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