CN117227431A - Cam-driven locking mechanism and bottom power conversion method of power conversion vehicle - Google Patents

Abstract

The application discloses a cam-driven locking mechanism and a bottom power exchanging method of a power exchanging vehicle. The application adopts the locking mechanism with the matched locking pin and pin hole, and the locking mechanism is realized by the plug-in matching of the locking pin and the pin hole, so that the application has simple structure and convenient operation, and is beneficial to the quick change of the battery pack; the rotary cam is simple in structure and flexible in driving, and can realize quick rotation driving on the premise of meeting the requirement of outputting proper driving force, so that the power conversion efficiency is further improved. In addition, for the power exchange trolley, the driving power required for rotating the cam is small, so that the configuration of a power source is simplified, the cost is reduced, and the like.

Description

Cam-driven locking mechanism and bottom power conversion method of power conversion vehicle

Technical Field

The application relates to the field of electric vehicle battery replacement, in particular to a cam driving locking mechanism and a bottom battery replacement method of a battery replacement vehicle.

Background

The current power supply mode of the electric automobile mainly comprises two modes of direct charging type charging and quick-change type power conversion, and because of the limitation of charging time and place, many new energy electric automobiles currently gradually adopt a mode of quickly changing batteries for energy supply.

In the prior art, large-sized vehicles such as heavy trucks and the like of new energy series are fixed on a girder of the vehicle in a top hanging mode, and the battery container is arranged close to a cab, so that a large potential safety hazard is brought to a driver and the vehicle in the driving process and the top hanging power-exchanging process; if the battery fails, the driver is directly injured. In addition, the lifting mode has high requirements on the place of the power exchange station, and the power exchange station is required to have a large enough area to execute the battery transferring and the battery storing of the lifting equipment, so that the station building cost is high.

Therefore, for large vehicles, there is a strong need for a safer and more reliable power conversion mode that is easy to popularize. For example, a chassis-type power conversion mode of a passenger car is adopted. In the chassis-type power conversion mode, a power conversion device (or a power conversion trolley) needs to travel below a vehicle so as to take off an original battery pack on the chassis of the vehicle, and then a new battery pack is mounted on the chassis of the vehicle. In order to ensure the stable installation of the battery pack, the battery pack is usually required to be locked, a locking structure for locking the battery pack in the prior art is relatively complex, the operation is inconvenient, the locking or unlocking efficiency of the battery pack is low, and the quick replacement of the battery pack is influenced; and for the battery replacement equipment, the operation requirement is high, for example, the battery replacement equipment needs to carry a new battery pack to move in multiple directions to enable the battery pack to reach the expected battery replacement position to be locked by matching with a locking structure, so that a power driving system of the battery replacement equipment needs higher configuration, the action of the battery replacement equipment is complex and needs high-precision control, the control difficulty is high, and the improvement of the battery replacement efficiency and the saving of the cost are not facilitated.

Disclosure of Invention

In order to solve the problems in the prior art, the application provides a cam-driven locking mechanism and a bottom power conversion method of a power conversion vehicle, and the composition, the use and the like of the locking mechanism for locking a battery pack are optimized to at least improve the power conversion efficiency of the battery pack and simplify the power conversion operation flow.

According to a first aspect of the application, the application provides a cam-driven locking mechanism applied to bottom power conversion of a power conversion vehicle, comprising a pin hole arranged on one of the power conversion vehicle and a battery pack and a locking pin arranged on the other of the power conversion vehicle and the battery pack, wherein the locking pin and the pin hole are in driving insertion fit through a rotating cam to lock the battery pack to the power conversion vehicle.

The application adopts the locking mechanism with the matched locking pin and pin hole, and the locking mechanism is realized by the plug-in matching of the locking pin and the pin hole, so that the application has simple structure and convenient operation, and is beneficial to the quick change of the battery pack; the rotary cam is simple in structure and flexible in driving, and can realize quick rotation driving on the premise of meeting the requirement of outputting proper driving force, so that the power conversion efficiency is further improved. In addition, for the power exchange trolley, the driving power required for rotating the cam is small, so that the configuration of a power source is simplified, the cost is reduced, and the like.

Preferably, the locking mechanism is provided with a plurality of rotating cams and a plurality of locking pins, the number of the rotating cams is smaller than that of the locking pins, the locking pins are formed into an integral piece through the connecting rod, the rotating cams rotate along a preset direction to push the connecting rod to drive the locking pins to be inserted into the pin holes, and the rotating cams reset to enable the locking pins to be separated from the pin holes.

In the scheme, more lock pins can be driven by fewer rotating cams, so that on one hand, the structural configuration can be simplified, the number of the rotating cams is reduced, meanwhile, the driving of the rotating cams is saved, and on the other hand, under the condition that a plurality of lock pins are connected, the synchronous movement of the lock pins can be realized, and the locking or unlocking efficiency can be greatly improved; the rotating cam can push the lock pin to be inserted into the pin hole to lock the rotating cam along the preset direction, otherwise, when the rotating cam resets, the lock pin can be released from the pin hole to unlock the rotating cam after losing stress, and the plugging matching structure is quite convenient, has higher reliability, can not generate the phenomenon of clamping stagnation/blocking in the locking process, and can avoid locking failure and ensure the smoothness of locking.

Preferably, the locking mechanism is provided with a plurality of rotating cams and a plurality of locking pins, the rotating cams and the locking pins are arranged in one-to-one correspondence, the rotating cams rotate along a preset direction to push the locking pins to be inserted into the pin holes, and the rotating cams reset to enable the locking pins to be separated from the pin holes.

In the scheme, the rotating cams and the lock pins are arranged in one-to-one correspondence, namely, each rotating cam can drive one lock pin, so that the reliability of movement of each lock pin can be improved, each rotating cam only needs to provide thrust required by a corresponding single lock pin, the power driven by each rotating cam is small, the energy consumption of a power source can be saved, and the quick rotation of the rotating cams is facilitated.

Preferably, a plurality of the locking pins are provided in a longitudinal direction or a height direction of the battery-change vehicle.

The application does not limit the arrangement mode of a plurality of lock pins, and can improve the flexibility of the arrangement of the lock pins so as to adapt to vehicles or battery packs with different structures.

Preferably, the pin holes are round or kidney-shaped; the locking mechanism is provided with a plurality of pin holes, at least one of the pin holes is circular, the rest of the pin holes are kidney-shaped, and the kidney-shaped pin holes limit the movement of the lock pin along the vertical direction so as to lock the lock pin.

The application does not limit the shape of the pin hole, when the pin hole is round, the circumferential limit of the lock pin can be enhanced, and the lock pin can be prevented from larger up-down left-right floating along with the vibration of the vehicle, thereby affecting the locking effect of the battery pack; when the locking pin is waist-shaped, the alignment precision of the locking pin can be reduced, namely the locking pin is easier to insert into the pin hole, and the phenomenon that the power conversion efficiency is influenced by repeatedly adjusting to align the locking pin with the pin hole can be avoided. In the scheme of a plurality of pin holes, at least one of the pin holes is designed to be round, the locking effect of the battery pack is guaranteed, other pin holes are designed to be waist-shaped, the alignment precision of the lock pin can be effectively reduced, and the locking efficiency is improved, wherein the waist-shaped pin holes can limit the lock pin to move along the vertical direction, namely, the lock pin can not float up and down along the pin holes in the locking state, so that the whole battery pack can be prevented from shaking up and down due to vehicle vibration, meanwhile, the waist-shaped pin holes allow the lock pin to have tiny floating allowance in the horizontal direction, under the working conditions of turning, sudden stop and the like of the vehicle, the lock pin can be prevented from being subjected to instantaneous larger impact when the lock pin is completely limited by the pin holes, the lock pin is easy to break, and the service life of the lock pin is prolonged.

Preferably, the locking mechanism includes a locking limit structure by which the rotating cam is restricted from being held in the locked position when the rotating cam is rotated into position.

In the scheme, through setting up locking limit structure, can increase the locking limit to rotating the cam, and then increase the locking limit to the lockpin, can prevent that vehicle vibration from leading to rotating the cam and rotating along the direction that resets and being difficult to keep the thrust to the lockpin, influence the cooperation locking effect of lockpin and pinhole, be favorable to promoting the locking stability and the reliability of battery package promptly.

Preferably, the lock pins are formed into an integral piece through a connecting rod, one side of the connecting rod is connected with the lock pins, the other side of the connecting rod is in contact fit with the rotating cam, the locking limiting structure comprises a limiting protrusion arranged on one of the connecting rod and the rotating cam and a limiting groove arranged on the other of the connecting rod and the rotating cam, and the rotating cam rotates until the limiting protrusion is clamped into the limiting groove when the lock pins are in plug fit with the pin holes.

In the scheme, through setting up simple spacing arch and spacing groove in rotating cam and connecting rod complex region, spacing arch and spacing groove lock when rotating cam rotates the locking position of lockpin and pinhole, and the operation can realize locking pin locking and rotating cam locking promptly, can simplify the flow, improve locking efficiency.

Preferably, the rotating cam comprises a cam head, a rotating shaft fixedly connected with the cam head and a sleeve sleeved on the outer side of the rotating shaft, the rotating shaft rotates relative to the sleeve, the cam head can be lifted relative to the sleeve, the locking limiting structure comprises a limiting groove arranged on the sleeve and a limiting protrusion arranged on the cam head, and when the rotating cam rotates in place, the cam head descends relative to the sleeve so that the limiting protrusion is clamped into the limiting groove.

In the scheme, the locking limiting structure can be directly arranged on the rotating cam, the cam head is capable of rotating under the action of the rotating shaft to provide thrust for the lock pin by utilizing the characteristic that the cam head can be lifted up and down relative to the sleeve, and the cam head has a rotating freedom when lifted up to a certain height relative to the sleeve.

Preferably, the locking limiting structure comprises a limiting rod arranged on the rotating cam, the battery replacing vehicle or the battery pack is provided with a limiting hole, and the limiting rod is inserted into the limiting hole when the rotating cam rotates in place.

In the scheme, the cooperation structure of the limiting rod and the limiting hole is adopted, the structure is simple, the use is reliable, the setting positions of the limiting rod and the limiting hole are not limited, and the rotating cam can be conveniently locked when the rotating cam rotates to the locking position of the lock pin and the pin hole.

Preferably, the inner side wall of the sleeve is provided with an axially extending stop slot, the outer side wall of the rotating shaft is provided with a convex column, the convex column slides along the stop slot, and the stop slot limits the stroke of the rotating shaft along the vertical direction.

In the above scheme, the stop groove can be used for limiting the stroke of the rotating shaft along the vertical direction, namely limiting the ascending or descending distance of the cam head relative to the sleeve, so that excessive movement of the rotating shaft is avoided, for example, after the rotating cam is unlocked from a locking state, the situation that the cam head is difficult to return to a proper corresponding position with the lock pin when the ascending distance of the cam head is too large can be avoided by limiting the ascending distance of the cam head relative to the sleeve, and the next pushing of the lock pin is influenced.

Preferably, the locking mechanism is provided with a locking pin seat, the locking pin seat is provided with a guide hole, one end of the locking pin is connected with the connecting rod, the other end of the locking pin is supported in the guide hole, and the locking pin slides along the guide hole under the action of driving force.

In the scheme, through setting up the lock pin seat, can provide the support for the lockpin, the lockpin can be close to or keep away from the pinhole motion along the guiding hole towards the one end of pinhole, can avoid the lockpin to be used for pegging graft complex one end perk or sagging, influences and pinhole alignment to guarantee the reliability of lockpin locking.

Preferably, a spring is sleeved on the lock pin, one end of the spring abuts against the connecting rod, the other end of the spring abuts against the lock pin seat, and the spring provides elastic force for driving the connecting rod to be far away from the pin hole when the rotating cam is reset.

In the scheme, the spring is arranged, and the elastic force of the spring can assist the rotating cam to reset rapidly, so that unlocking of the battery pack can be accelerated.

Preferably, a first connector is installed at one end of a rotating shaft of the rotating cam, a first motor is arranged on the level changing platform, a second connector is installed at one end of a motor shaft of the first motor, and the first connector and the second connector are in plug-in fit so that the first motor is in transmission connection with the rotating shaft.

In the scheme, through setting up first connector and second connector, help realizing that first motor and rotating cam are reliably connected fast to first motor provides rotation power for rotating the cam, the grafting cooperation structure of first connector and second connector makes things convenient for the staff to operate, helps saving user's energy, reduces the operation degree of difficulty.

Preferably, a first installation flat position is formed at one end of the motor shaft, a first installation groove for receiving the first installation flat position is formed in the second connector, and the first installation flat position is in plug-in fit with the first installation groove.

In the scheme, the first installation flat position of the motor shaft is utilized to form a rotation stopping structure in cooperation with the first installation groove, the first motor can drive the rotating cam in a positive and negative rotation mode, compared with the scheme that the first motor can only drive in a one-way mode, the flexibility of driving the rotating cam can be improved, and the rotating cam can be driven to push the lock pin to be inserted into the pin hole and reset to unlock by only depending on positive and negative rotation of the first motor, so that the operation is more convenient.

The pivot is kept away from the one end of cam head forms the second and installs flat position, first connector is equipped with the receipt the second mounting groove of second installation flat position, the second installation flat position with second mounting groove grafting cooperation.

In the scheme, the second installation flat position of the rotating shaft is utilized to form a rotation stopping structure in cooperation with the second installation groove, so that the rotating shaft can be driven by both forward and reverse rotation of the first motor, and compared with the scheme that the first motor can only drive in one direction, the flexibility of driving the rotating cam can be improved.

Preferably, the lock pin is arranged on the battery pack, the pin hole is arranged on the battery replacing vehicle, the battery replacing vehicle is provided with a vehicle beam, and a plurality of pin holes are arranged at intervals along the side wall of the vehicle beam.

In the scheme, the pin hole is formed in the battery-powered vehicle, the transformation requirement on the vehicle end is low, no matter which vehicle type is, the pin hole is easy to machine, the battery-powered requirement of various vehicle types can be met, other accessories are not required, and the transformation cost of the battery-powered vehicle cannot be increased.

According to a second aspect of the present application, there is provided a bottom power exchanging method of a power exchanging vehicle, one of the power exchanging vehicle and a battery pack being provided with a pin hole, the other of the power exchanging vehicle and the battery pack being provided with a lock pin, the lock pin and the pin hole being engaged by a rotary cam-driven plug-in, the battery pack performing a removal or installation operation of the battery pack from the bottom of the power exchanging vehicle by a power exchanging trolley, the bottom power exchanging method comprising: controlling the power changing trolley to drive the battery pack to be installed to move to a power changing position at the bottom of the power changing trolley; the battery pack is lifted by a level changing platform of the power changing trolley, so that the battery pack reaches the height position of the locking pin aligned with the pin hole; and controlling the rotating cam to drive the lock pin to be inserted into the pin hole so as to execute the locking operation of the battery pack.

The configuration of the locking mechanism is beneficial to simplifying the battery pack power conversion flow and improving the power conversion efficiency, and particularly, the battery pack only needs to move vertically, so that the action of the power conversion trolley can be simplified for the power conversion trolley, namely, the power conversion trolley only needs to lift the battery pack to a proper height, in the prior art, the power conversion trolley also needs to drive the battery pack to move horizontally or rotate in addition to controlling the battery pack to lift, and particularly when the weight of the battery pack is large, the control difficulty of the power conversion trolley is certainly increased, so that the structural configuration of the power conversion trolley is more complex, and the cost is increased.

Preferably, the level changing platform is provided with a first motor and a second motor, and the level changing platform for controlling the power changing trolley lifts the battery pack, specifically: controlling the second motor to drive the power conversion platform to ascend so as to drive the battery pack to ascend; the control of the rotating cam drives the lock pin to be inserted into the pin hole is specifically as follows: controlling the first motor to drive the rotating cam to rotate so as to push the lock pin to be inserted into the pin hole; wherein the power of the first motor is less than the power of the second motor.

In the above scheme, the motor for lifting the battery pack and the motor for driving the rotary cam can be respectively arranged, and the two motors are different in configuration, and because the power required by the rotation of the cam to push the lock pin to be inserted into the pin hole is smaller, the configuration of the first motor can be relatively simple, the power of the first motor can be relatively smaller, and the configuration of the first motor is beneficial to simplifying the structural configuration and saving the cost.

Preferably, the first motor is controlled to drive the rotating cam to rotate so as to push the lock pin to be inserted into the pin hole, specifically: controlling the first motor to rotate positively, and enabling the rotating cam to rotate along a preset direction so as to push the lock pin to be inserted into the pin hole; the bottom power conversion method further comprises the following steps: and controlling the first motor to rotate reversely, and resetting the rotating cam to enable the lock pin to be separated from the pin hole so as to execute unlocking operation of the battery pack.

In the scheme, the rotating cam can rotate in different directions by utilizing the forward and reverse rotation of the first motor, so that the battery pack is locked and unlocked, the operation is convenient, and the power conversion efficiency is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

Fig. 1 is a schematic diagram showing an assembled structure of a battery-powered vehicle (heavy truck) according to an embodiment of the present application.

Fig. 2 is a schematic view of the battery pack removed from the battery change vehicle of fig. 1.

Fig. 3 is a schematic structural view of a vehicle beam according to an embodiment of the present application.

Fig. 4 is a schematic view illustrating a structure of a battery pack according to an embodiment of the present application.

Fig. 5 is an enlarged schematic view of the structure at a in fig. 4.

Fig. 6 is an enlarged schematic view of the structure at B in fig. 4.

Fig. 7 is a schematic view of a rotating cam according to an embodiment of the present application.

Fig. 8 is a schematic flow chart of a bottom power conversion method of a power conversion vehicle according to an embodiment of the application.

Reference numerals:

10-pin holes, 11-lock pins, 12-rotating cams, 13-connecting rods, 121-pushing ends, 122-cam heads, 123-rotating shafts, 124-sleeves, 14-lock pin seats, 141-guide holes, 100-battery changing vehicles, 101-vehicle beams and 200-battery packs.

Detailed Description

In order to more clearly illustrate the general inventive concept, reference will be made in the following detailed description, by way of example, to the accompanying drawings.

In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than as described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. However, it is noted that direct connection indicates that two connected bodies are not connected through a transition structure, but are connected through a connection structure to form a whole. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Example 1:

the cam-driven locking mechanism of the embodiment can be applied to a chassis type power conversion structure of a power conversion vehicle, wherein the power conversion vehicle comprises but is not limited to a truck vehicle, such as a heavy truck, and the like, and the power conversion vehicle has huge weight and strong cargo carrying capacity and can be divided into two parts: the large-scale independent container comprises a head part and a carriage part, wherein the carriage part is mainly a large-scale independent container which can be hung on the head part. In addition, a beam body extending in the longitudinal direction of the vehicle body, that is, a vehicle beam structure is provided on the mechanism of the vehicle head portion.

Illustratively, as shown in FIG. 1, the battery-powered vehicle 100 is the head portion of a heavy truck, which may be later articulated to a large container or like compartment portion (not shown in FIG. 1) to provide high cargo capacity for the heavy truck. As shown in fig. 1 and 2, the battery replacement vehicle 100 has a beam body, specifically, two vehicle beams 101 extending in the vehicle body length direction, for locking the quick-change battery pack 200.

Based on the battery exchange vehicle 100 described above, the present embodiment provides a cam-driven locking mechanism including a pin hole 10 provided on one of the battery exchange vehicle 100 and the battery pack 200 and a lock pin 11 provided on the other of the battery exchange vehicle 100 and the battery pack 200, the lock pin 11 and the pin hole 10 driving a plug-in fit by rotating the cam 12 to lock the battery pack 200 to the battery exchange vehicle 100.

Specifically, the present application is not limited to the arrangement positions of the pin hole 10 and the lock pin 11, that is, both may be alternatively arranged at appropriate positions on the battery pack 200 and the replacement vehicle 100, but for the replacement vehicle 100, the above-described structure of the vehicle body 101 may be used to provide an installation position to make full use of the structure and space of the vehicle body 101. Illustratively, as shown in fig. 3, the pin hole 10 is provided on the battery-changing vehicle 100, specifically, may be provided on the vehicle beam 101, and accordingly, the lock pin 11 and the like are provided on the battery pack 200. Through setting up pinhole 10 on trading electric vehicle 100, the transformation requirement to the car end is low, is applicable to multiple motorcycle type, and need not to add other accessories, can not increase trading electric vehicle 100's transformation cost. Further, the rotating cam 12 acts on the lock pin 11 to push the lock pin 11 to be inserted into the pin hole 10 to realize locking, the rotating cam 12 is simple in structure and flexible in rotation, power required by rotation is small, and the power conversion efficiency is improved.

Further, as shown in fig. 4, the locking mechanism is provided with a plurality of rotating cams 12 and a plurality of locking pins 11, the number of the rotating cams 12 is smaller than that of the locking pins 11, the locking pins 11 are formed into a whole through the connecting rod 13, the rotating cams 12 rotate along a preset direction to push the connecting rod 13 to drive the locking pins 11 to be inserted into the pin holes 10, and the rotating cams 12 reset to enable the locking pins 11 to be separated from the pin holes 10.

By connecting the plurality of locking pins 11 into one piece, synchronous movement of the plurality of locking pins 11 can be achieved, and the situation that one or some of the locking pins 11 forget to insert into the pin holes 10 can be avoided, so that the locking effect of the battery pack 200 can be ensured. The number of the rotating cams 12 can be reduced on the premise that the connecting rod 13 can be pushed to push the plurality of lock pins 11, and proper driving force is provided. Fig. 4 shows an example (in terms of single side) in which seven locking pins 11 are arranged in a matching manner with three rotating cams 12, that is, three rotating cams 12 act simultaneously to push the connecting rod 13 to drive seven locking pins 11 to act, so that the structure configuration is simple, and the overall shape of the battery pack 200 is simplified. When the rotating cam 12 rotates along the preset direction, the rotating cam 12 can push the connecting rod 13 to advance to push one end of the lock pin 11 to be inserted into the pin hole 10, otherwise, when the acting force of the rotating cam 12 on the connecting rod 13 is withdrawn, the rotating cam 12 resets, and the lock pin 11 is separated from the pin hole 10 to be unlocked. When the rotating cam 12 is reset, it may be rotated in the direction opposite to the predetermined direction or in the same direction as the predetermined direction, for example, as shown in fig. 5, the pushing end 121 of the rotating cam 12 may be inclined to one side from the opposite side to the connecting rod 13.

In the present embodiment, when the pin holes 10 are provided on the vehicle body frame 101, in particular, a plurality of pin holes 10 may be arranged at intervals along the side walls of the vehicle body frame 101, and when the battery pack 200 is lifted up to an appropriate height from the bottom of the vehicle, a plurality of locking pins 11 reach the outside of the plurality of pin holes 10 in the horizontal direction, and then the locking pins 11 may be driven to be inserted into the pin holes 10 when the rotating cam 12 is driven.

It should be noted that, although the plurality of pin holes 10/the plurality of locking pins 11 are arranged along the length direction of the battery changing vehicle 100, in other examples, the plurality of pin holes 10/the plurality of locking pins 11 may be arranged along the height direction of the battery changing vehicle 100, depending on the specific configuration of the battery changing vehicle 100 and the battery pack 200.

The shape of the pin hole 10 is not limited, for example, the pin hole 10 can be circular, so that the circumferential limit of the lock pin 11 is enhanced, and the lock pin 11 can be prevented from floating up and down and left and right greatly along with the vibration of a vehicle, and the locking effect of the battery pack 200 is prevented from being influenced; or the pin hole 10 may be formed in a waist shape, which helps to reduce the alignment accuracy of the lock pin 11, i.e., the lock pin 11 is easier to be inserted into the pin hole 10, so that repeated adjustment to align the lock pin 11 with the pin hole 10 can be avoided to affect the power conversion efficiency.

Preferably, the locking mechanism is provided with a plurality of pin holes 10, at least one of the plurality of pin holes 10 is circular, the remaining pin holes 10 are kidney-shaped, and the kidney-shaped pin holes 10 restrict movement of the locking pin 11 in the vertical direction to lock the locking pin 11.

In one example, only one circular pin hole 10 is provided, and the circular pin hole 10 may be provided at a middle position to secure locking force to the entire battery pack 200 in a locked state.

In another example, two circular pin holes 10 are provided, and the two circular pin holes 10 are provided at both ends, respectively, so that the overall locking effect of the battery pack 200 in the locked state can be improved as compared to the scheme of a single circular pin hole 10. In the case of providing fewer round pin holes 10, only fewer locking pins 11 need to be aligned strictly, and the allowable locking pins 11 for the kidney-shaped pin holes 10 have low alignment accuracy, so that the locking operation difficulty of the battery pack 200 can be reduced. The kidney-shaped pin hole 10 can limit the movement of the lock pin 11 along the vertical direction, namely, the lock pin 11 cannot float up and down along the pin hole in the locking state, so that the whole battery pack 200 can be prevented from shaking up and down due to vehicle vibration, meanwhile, the kidney-shaped pin hole 10 allows the lock pin 11 to have a tiny floating allowance in the horizontal direction, and under the working conditions of vehicle turning, sudden stop and the like, the lock pin 11 can be prevented from being subjected to instantaneous larger impact when the lock pin 11 is completely limited by the pin hole 10 due to the fact that the lock pin 11 is easy to break, namely, the service life of the lock pin 11 is prolonged.

As shown in fig. 5, the locking pin 11 is inserted into the pin hole 10 when the rotating cam 12 is rotated to the pushing end 121 thereof facing the connecting rod 13, which is not only the locking position of the battery pack 200, but also the locking position of the rotating cam 12, in order to prevent the locking pin 11 from coming out of the pin hole 10 (or the tendency of the locking pin 11 to come out of the pin hole 10) from being caused by the return of the rotating cam 12 from affecting the locking stability and reliability of the battery pack 200, the present embodiment is also provided with a locking limit structure capable of restricting the rotating cam 12 to remain in the locking position when the rotating cam 12 is rotated to the locking position, thereby continuously applying a force to the locking pin 11 to keep the locking pin 11 in the locked state.

The specific form of the locking limiting structure is not specifically required in this embodiment, and for example, any one of the following structures may be adopted.

Example 1:

the lock pins 11 are formed into an integral piece through the connecting rod 13, one side of the connecting rod 13 is connected with the lock pins 11, the other side of the connecting rod 13 is in contact fit with the rotating cam 12, the locking limiting structure comprises a limiting protrusion arranged on one of the connecting rod 13 and the rotating cam 12 and a limiting groove arranged on the other of the connecting rod 13 and the rotating cam 12, and the rotating cam 12 rotates until the lock pins 11 are in plug fit with the pin holes 10, and the limiting protrusion is clamped into the limiting groove.

For example, as shown in fig. 5, a limit groove (not shown) is formed on one of the side walls of the pushing end 121, and a limit protrusion extending outwards is formed on the connecting rod 13, when the rotating cam 12 rotates until the pushing end 121 faces the connecting rod 13, the limit protrusion can be blocked into the limit groove to lock the rotating cam 12, so that the locking effect of the battery pack 200 is prevented from being affected due to the rotation deviation of the vibrating rotating cam 12 during the running process of the vehicle. It will be appreciated that the positions of the above-mentioned limit protrusions and limit grooves may be replaced, i.e. the limit protrusions may be provided on the rotating cam 12 and the limit grooves may be provided on the connecting rod 13.

Example 2:

the rotating cam 12 comprises a cam head 122, a rotating shaft 123 fixedly connected with the cam head 122 and a sleeve 124 sleeved on the outer side of the rotating shaft 123, the rotating shaft 123 rotates relative to the sleeve 124, the cam head 122 can lift relative to the sleeve 124, and the locking limiting structure comprises a limiting groove (not shown in the figure) arranged on the sleeve 124 and a limiting protrusion (not shown in the figure) arranged on the cam head 122, and when the rotating cam 12 rotates in place, the cam head 122 descends relative to the sleeve 124 so that the limiting protrusion is clamped into the limiting groove.

As shown in fig. 5 and 7, the cam head 122 is fixedly connected to the upper end of the rotating shaft 123, and when the lower end of the rotating shaft 123 is driven, it can drive the cam head 122 to rotate. The lower end of the sleeve 124 may be fixed to the battery pack 200 so that the sleeve 124 does not rotate. Specifically, when the cam head 122 needs to be rotated, the rotating shaft 123 can be controlled to be lifted a certain distance relative to the sleeve 124, at this time, a gap is formed between the bottom of the cam head 122 and the top of the sleeve 124, the cam head 122 has a rotation freedom, and when the cam head 122 rotates to the locking position, the rotating shaft 123 needs to be controlled to be lowered relative to the sleeve 124 in order to lock the rotating cam 12, and the lowering distance is required to be enough to enable the limit protrusion on the cam head 122 to be blocked into the limit groove on the sleeve 124.

Example 3:

the locking limit structure comprises a limit rod arranged on the rotary cam 12, a limit hole is formed in the battery changing vehicle 100 or the battery pack 200, and the limit rod is inserted into the limit hole when the rotary cam 12 rotates in place.

In this example, the cooperation structure of the limit lever and the limit hole is adopted, the structure is simple, the use is reliable, and the setting positions of the limit lever and the limit hole are not limited, so long as the requirement that the rotary cam is conveniently locked when the rotary cam 12 rotates to the locking position of the lock pin 11 and the pin hole 10 can be satisfied.

Further, on the basis of the above example 2, a spring may be provided between the rotation shaft 123 and the sleeve 124, wherein an upper end of the spring is coupled to a lower surface of the cam head 122, and a lower end of the spring is fixed to the battery pack 200, whereby the spring is stretched when the cam head 122 is lifted with respect to the sleeve 124, and the cam head 122 may be lowered by a pulling force of the spring after the cam head 122 is rotated in place, so as to be restrained with the sleeve 124.

Further, on the basis of the above example 2, the inner side wall of the sleeve 124 is provided with an axially extending stop groove, the outer side wall of the rotating shaft 123 is provided with a boss, the boss slides along the stop groove, and the stop groove defines the stroke of the rotating shaft 123 along the vertical direction.

In order to meet the requirement that the rotating shaft 123 rotates relative to the sleeve 124 and can lift relative to the sleeve 124, specifically, the inner side wall of the sleeve 124 is provided with at least two vertical stop slots, and the upper ends of the two stop slots are communicated through an arc slot. When the cam head 122 needs to be rotated, the protruding column on the rotating shaft 123 firstly ascends along the first stop groove so that the cam head 122 is lifted, and when the protruding column ascends to the top end of the first stop groove, the protruding column can enter the arc groove in a homeopathic manner so that the protruding column can be guided along the arc groove in the rotation process of the cam head 122. Further, when the cam 122 rotates to the locking position, the protruding pillar can reach the second stop slot and enter the second stop slot along the second stop slot, and the protruding pillar descends along the second stop slot to enable the cam 122 to descend relative to the sleeve 124, so that the limit protrusion on the cam 122 can be blocked into the limit slot on the sleeve 124. By setting the positions of the top and bottom of the two stopper grooves, the stroke of the rotation shaft 123 in the vertical direction can be defined, and the control accuracy can be improved.

Further, the locking mechanism is provided with a locking pin seat 14, the locking pin seat 14 is provided with a guide hole 141, one end of the locking pin 11 is connected to the connecting rod 13, the other end is supported on the guide hole 141, and the locking pin 11 slides along the guide hole 141 under the action of driving force.

As shown in fig. 4 and 6, the latch boss 14 is secured to the battery pack 200 to provide support for the latch 11. In order to further optimize the alignment effect of the locking pin 11, preferably, the locking pin 11 is provided with a variable diameter, and the locking pin 11 passes through the guide hole 141 and has a larger size toward one end of the pin hole 10 than the aperture of the guide hole 141, so that the locking pin 11 can be always supported in the guide hole 141, the need of realignment installation after the locking pin 11 is separated from the guide hole 141 can be avoided, and meanwhile, the locking pin seat 14 can keep the orientation of the locking pin 11 stable, so that the difficulty of aligning the locking pin 11 with the pin hole 10 can be reduced.

Further, a spring is sleeved on the lock pin 11, one end of the spring abuts against the connecting rod 13, the other end of the spring abuts against the lock pin seat 14, and the spring provides elastic force for driving the connecting rod 13 to be far away from the pin hole 10 when the rotating cam 12 is reset. By providing a spring, the spring force of the spring can assist the rotating cam 12 to quickly return, thereby accelerating unlocking of the battery pack 200.

On the basis of the above scheme, for realizing the rotation drive of the rotating cam 12, the first connector is installed at one end of the rotating shaft of the rotating cam 12 in this embodiment, the level-changing table is provided with a first motor, the motor shaft end of the first motor is provided with a second connector, and the first connector and the second connector are in plug-in fit to enable the first motor to be in transmission connection with the rotating shaft.

In the configuration of fig. 7, the rotary cam 12 includes a cam head 122 and a rotary shaft 123, and the lower end of the rotary shaft 123 may pass through the battery pack 200 and then be connected to an underlying driving mechanism. In general, the rotating shaft 123 and the motor shaft are both of a thinner shaft structure, so that the two are aligned and connected conveniently, and the application is provided with a first connector and a second connector, which have a certain radial dimension compared with the rotating shaft 123 and the motor shaft, and are easier to be connected in a plugging manner. For example, the first connector is provided with a connecting tooth, the second connector is provided with a transmission groove, and the connecting tooth is inserted into the transmission groove to realize transmission connection, so that the first motor can output power to the rotating shaft 123 via the motor shaft to realize rotation of the cam head 122. Further, a soft rubber head can be arranged between the first connector and the second connector to absorb vibration and achieve the effect of noise reduction.

The first motor drives the rotating cam 12, for example, in such a manner that the first motor can drive the rotating cam 12 to rotate in a predetermined direction (i.e., a locking direction) when the first motor rotates forward, and the rotating cam 12 is reset when the first motor rotates backward. Or, the first motor rotates the rotating cam 12 in a preset direction (i.e. the locking direction) when rotating positively, the rotating cam 12 rotates a first angle to reach the locking position, and then the first motor rotates positively by a second angle based on the first angle to reset the rotating cam 12. In the forward and reverse rotation scheme of the motor, the rotation angle of the motor is easy to control, the locking and unlocking switching of the lock pin 11 is facilitated, and the use is reliable.

Further, a first installation flat position is formed at one end of the motor shaft, a first installation groove for receiving the first installation flat position is formed in the second connector, and the first installation flat position is in plug-in fit with the first installation groove.

In the prior art, the motor shaft and the second connector are in threaded connection, so that the first motor can only drive in one direction (namely, the first motor can only rotate along the direction of threaded locking, and the threaded connection becomes loose during reverse rotation), and the locking and unlocking of the lock pin 11 can be realized only by precisely controlling the rotation angle, which is relatively complex. In this embodiment, the first installation flat position of the motor shaft is utilized, and the first installation flat position and the first installation groove are matched to form a rotation stopping structure, so that the first motor can rotate positively and negatively to drive the rotating cam 12, compared with the scheme that the first motor can only drive unidirectionally, the flexibility of driving the rotating cam 12 can be improved, and the rotating cam 12 can be driven to push the lock pin 11 to be inserted into the pin hole 10 and reset the rotating cam 12 to unlock, so that the operation is more convenient.

The first installation flat position is in a D shape or a waist shape, and is arranged according to actual requirements. Or, the anti-rotation structure between the motor shaft and the second connector can also adopt a spline structure, and the application does not require any specific requirement.

The assembly structure of the rotating shaft 123 and the first connector is similar to the assembly structure of the motor shaft and the second connector, for example, one end of the rotating shaft 123 away from the cam head 122 forms a second installation flat position, the first connector is provided with a second installation groove for receiving the second installation flat position, and the second installation flat position is in plug-in fit with the second installation groove.

Utilize the second installation flat position of pivot 123, it forms the structure of stopping changeing with the cooperation of second mounting groove for first motor just reverses rotation and all can drive pivot 123, compares in the scheme that first motor can only unidirectional drive, can improve the flexibility of rotating cam drive 12.

Example 2:

the present embodiment provides a cam-driven lock mechanism differing from embodiment 1 only in the correspondence between the rotary cam 12 and the lock pin 11, specifically, the lock mechanism is provided with a plurality of rotary cams 12 and a plurality of lock pins 11, the plurality of rotary cams 12 are disposed in one-to-one correspondence with the plurality of lock pins 11, the rotary cams 12 are rotated in a preset direction to push the lock pins 11 into the pin holes 10, and the rotary cams 12 are reset to release the lock pins 11 from the pin holes 10.

In this embodiment, the plurality of lock pins 11 are independently arranged, and each lock pin 11 is provided with a rotating cam 12, so that the reliability of the movement of each lock pin 11 can be improved, and each rotating cam 12 only needs to provide the thrust required by the corresponding single lock pin 11, so that the power driven by each rotating cam 12 is small, the power source and the energy consumption can be saved, and the quick rotation of the rotating cam 12 can be facilitated.

Example 3:

on the basis of the cam-driven locking mechanism of the above embodiment 1 or embodiment 2, the present embodiment provides a bottom power exchanging method of a power exchanging vehicle, in which a battery pack 200 performs a disassembling or assembling operation of the battery pack 200 from the bottom of the power exchanging vehicle 100 by a power exchanging trolley, as shown in fig. 8, the bottom power exchanging method includes the steps of:

and 20, controlling the power changing trolley to drive the battery pack to be installed to move to a power changing position at the bottom of the power changing trolley.

Specifically, according to the specific structure of the battery changing vehicle 100 shown in fig. 1, when the battery changing vehicle 100 needs to be mounted, the battery changing vehicle 100 needs to be parked in a designated battery changing area, and then the battery changing vehicle moves to a battery changing position in the battery changing area with a new battery pack 200 to perform a battery mounting operation. For example, in the case where the battery pack 200 is locked to the vehicle beam 101, the power-change position may refer to a position where the battery pack 200 is facing the vehicle beam 101 so that the next step aligns the battery pack 200 with the locking pin 11, pin hole 10 structure on the vehicle beam 101.

And 30, controlling a level changing platform of the power changing trolley to lift the battery pack, so that the battery pack reaches the height position of the lock pin alignment pin hole.

Specifically, compared with the prior art, the present application only requires the lifting operation of the battery pack 200, in the previous step, the battery pack 200 is aligned to the vehicle beam 101, when the battery pack 200 is lifted to a height such that the locking pins 11 and the pin holes 10 are in one-to-one correspondence, the battery pack 200 is moved in place, and thereafter the battery change trolley is not operated any more, so that the control procedure of the battery change trolley can be simplified, and the battery change efficiency can be improved. When the pin hole 10 is provided at the side wall of the vehicle beam 101 and the battery pack 200 is lifted up in place, the locking pin 11 on the battery pack is positioned outside the pin hole 10 in the horizontal direction so that the next step performs locking of the battery pack 200.

Step 40, controlling the rotating cam to drive the lock pin to be inserted into the pin hole so as to execute the locking operation of the battery pack.

Specifically, as shown in fig. 5, the rotating cam 12 can push the lock pin 11 to be inserted into the pin hole 10 when rotating along the preset direction, thereby realizing the locking of the battery pack 200, and the operation is simple and quick.

Further, the level changing platform is provided with a first motor and a second motor,

step 30 specifically includes step 301, controlling a second motor to drive a power conversion platform to rise so as to drive a battery pack to rise;

step 40 specifically includes step 401, controlling the first motor to drive the rotating cam to rotate so as to push the lock pin to be inserted into the pin hole;

wherein the power of the first motor is less than the power of the second motor.

Thus, the motor for lifting the battery pack 200 and the motor for driving the rotary cam 12 may be separately provided, and the two motors may be differently configured, and since the power required for the cam to rotate to push the locking pin 11 into the pin hole 10 is small, the configuration of the first motor may be relatively simple, the power thereof may be relatively small, which is advantageous in simplifying the structural configuration and saving the cost.

The driving structure for lifting the battery pack 200 is not limited to the second motor, and may be a cylinder or a hydraulic cylinder, etc., and may be configured according to actual needs.

Further, step 401 specifically includes step 4011 of controlling the first motor to rotate forward, and rotating the rotating cam along a preset direction to push the lock pin to insert into the pin hole.

Specifically, the first motor is in driving connection with the rotating cam 12, and the first motor provides rotating power for the rotating cam 12. The first motor drives the rotating cam 12, for example, in such a manner that the rotating cam 12 is driven to rotate in a predetermined direction (i.e., a locking direction) when the first motor rotates forward, and the rotating cam 12 is reset when the first motor rotates backward. Or, the first motor rotates the rotating cam 12 in a preset direction (i.e. the locking direction) when rotating positively, the rotating cam 12 rotates a first angle to reach the locking position, and then the first motor rotates positively by a second angle based on the first angle to reset the rotating cam 12.

It will be appreciated that in step 4011, insertion of the locking pin 11 into the pin bore 10 may also be accomplished by controlling the first motor to rotate in reverse.

Further, the bottom power exchanging method further includes a step 4012 of controlling the first motor to rotate reversely, and rotating the cam to reset to release the lock pin from the pin hole, so as to perform the unlocking operation of the battery pack.

Specifically, when the first motor is reversed, the pushing force of the rotating cam 12 to the connecting rod 13 is weakened, and at this time, the locking pin 11 can be separated from the pin hole 10 under the assistance of the elastic force of the spring on the locking pin 11, or under the action of other external forces, so that the unlocking of the battery pack 200 is realized.

It will be appreciated that in step 4012, the unlocking of the corresponding battery pack 200 may be performed by the first motor being driven in forward rotation, and the driving may be selected according to the configuration of the first motor and the initial orientation of the rotating cam 12.

The technical solution protected by the present invention is not limited to the above embodiments, and it should be noted that, the combination of the technical solution of any one embodiment with the technical solution of the other embodiment or embodiments is within the scope of the present invention. While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.

Claims (10)

1. The cam-driven locking mechanism is applied to bottom battery replacement of a battery replacement vehicle and is characterized by comprising a pin hole arranged on one of the battery replacement vehicle and a battery pack and a lock pin arranged on the other of the battery replacement vehicle and the battery pack, wherein the lock pin and the pin hole are matched in a driving inserting way through a rotating cam to lock the battery pack to the battery replacement vehicle.

2. A cam driven locking mechanism as defined in claim 1, wherein,

the locking mechanism is provided with a plurality of rotating cams and a plurality of locking pins, the number of the rotating cams is smaller than that of the locking pins, the locking pins form an integral piece through a connecting rod, the rotating cams rotate along a preset direction to push the connecting rod to drive the locking pins to be inserted into the pin holes, and the rotating cams reset to enable the locking pins to be separated from the pin holes;

or the locking mechanism is provided with a plurality of rotating cams and a plurality of locking pins, the rotating cams and the locking pins are arranged in one-to-one correspondence, the rotating cams rotate along a preset direction to push the locking pins to be inserted into the pin holes, and the rotating cams reset to enable the locking pins to be separated from the pin holes;

alternatively, a plurality of the locking pins are provided along the longitudinal direction or the height direction of the battery-change vehicle.

3. A cam driven locking mechanism as defined in claim 1, wherein,

the pin holes are round or waist-shaped;

the locking mechanism is provided with a plurality of pin holes, at least one of the pin holes is circular, the rest of the pin holes are kidney-shaped, and the kidney-shaped pin holes limit the movement of the lock pin along the vertical direction so as to lock the lock pin.

4. A cam driven locking mechanism as defined in claim 1, wherein,

the locking mechanism comprises a locking limit structure, and the rotating cam is limited to be kept at a locking position through the locking limit structure when rotating to the position.

5. A cam driven locking mechanism as defined in claim 4, wherein,

the locking limiting structure comprises a limiting protrusion arranged on one of the connecting rod and the rotating cam and a limiting groove arranged on the other of the connecting rod and the rotating cam, and the rotating cam rotates to enable the limiting protrusion to be clamped into the limiting groove when the locking pin is in plug-in fit with the pin hole;

or, the locking limit structure comprises a limit rod arranged on the rotating cam, the battery changing vehicle or the battery pack is provided with a limit hole, and the limit rod is inserted into the limit hole when the rotating cam rotates in place.

6. A cam driven locking mechanism as defined in claim 4, wherein,

The rotating cam comprises a cam head, a rotating shaft fixedly connected with the cam head and a sleeve sleeved on the outer side of the rotating shaft, the rotating shaft rotates relative to the sleeve, the cam head can lift relative to the sleeve, the locking limiting structure comprises a limiting groove arranged on the sleeve and a limiting protrusion arranged on the cam head, and when the rotating cam rotates in place, the cam head descends relative to the sleeve so that the limiting protrusion is clamped into the limiting groove;

preferably, the inner side wall of the sleeve is provided with an axially extending stop slot, the outer side wall of the rotating shaft is provided with a convex column, the convex column slides along the stop slot, and the stop slot limits the stroke of the rotating shaft along the vertical direction.

7. A cam driven locking mechanism as defined in claim 2, wherein,

the locking mechanism is provided with a locking pin seat, the locking pin seat is provided with a guide hole, one end of the locking pin is connected with the connecting rod, the other end of the locking pin is supported by the guide hole, and the locking pin slides along the guide hole under the action of driving force;

preferably, a spring is sleeved on the lock pin, one end of the spring abuts against the connecting rod, the other end of the spring abuts against the lock pin seat, and the spring provides elastic force for driving the connecting rod to be far away from the pin hole when the rotating cam is reset.

8. A cam driven locking mechanism as defined in claim 1, wherein,

the rotating cam comprises a rotating cam body, wherein a rotating shaft is arranged on the rotating cam body, a rotating cam is arranged on the rotating shaft, a rotating shaft is arranged on the rotating cam body, a rotating shaft is arranged on the rotating cam, a rotating shaft is arranged on the rotating shaft, a first connecting head is arranged at one end of the rotating shaft, a first motor is arranged on the rotating shaft, a second connecting head is arranged at one end of a motor shaft of the first motor, and the first connecting head and the second connecting head are in plug-in fit with the rotating shaft, so that the first motor is in transmission connection with the rotating shaft.

9. A cam driven locking mechanism as defined in claim 1, wherein,

the locking pin is arranged on the battery pack, the pin holes are formed in the battery replacing vehicle, the battery replacing vehicle is provided with a vehicle beam, and a plurality of pin holes are formed in the side wall of the vehicle beam at intervals.

10. A bottom power exchanging method of a power exchanging vehicle, characterized in that one of the power exchanging vehicle and a battery pack is provided with a pin hole, the other of the power exchanging vehicle and the battery pack is provided with a lock pin, the lock pin and the pin hole are in driving insertion fit through a rotating cam, the battery pack performs a disassembling or assembling operation of the battery pack from the bottom of the power exchanging vehicle through a power exchanging trolley, the bottom power exchanging method comprises:

controlling the power changing trolley to drive the battery pack to be installed to move to a power changing position at the bottom of the power changing trolley;

The battery pack is lifted by a level changing platform of the power changing trolley, so that the battery pack reaches the height position of the locking pin aligned with the pin hole;

and controlling the rotating cam to drive the lock pin to be inserted into the pin hole so as to execute the locking operation of the battery pack.