CN222845953U

CN222845953U - Battery posture change device

Info

Publication number: CN222845953U
Application number: CN202420667309.5U
Authority: CN
Inventors: 周晓煌; 龙琦; 梁长江
Original assignee: Hymson Laser Technology Group Co Ltd
Current assignee: Hymson Laser Technology Group Co Ltd
Priority date: 2024-03-29
Filing date: 2024-03-29
Publication date: 2025-05-09
Anticipated expiration: 2034-03-29

Abstract

The application discloses a battery posture changing device which comprises a turnover module, a distance changing module and a driving device, wherein the turnover module comprises a turnover frame, a clamp assembly and a first driving assembly which are rotatably arranged, the driving device is in transmission connection with the turnover frame, the clamp assembly is movably arranged on the turnover frame, at least two clamping parts are arranged at intervals along the rotating axis of the turnover frame, the first driving assembly is in transmission connection with the clamp assembly, the distance changing module comprises at least two fixing pieces and a second driving assembly, the at least two fixing pieces are movably arranged on the turnover frame respectively and are arranged at intervals along the rotating axis of the turnover frame, the at least two fixing pieces are also in one-to-one correspondence with the at least two clamping parts, and the second driving assembly is in transmission connection with the at least two fixing pieces respectively. According to the technical scheme, the battery overturning and distance changing device has the advantages that the overturning and distance changing functions of the battery are achieved, meanwhile, the transferring device and transferring time are saved, and therefore the battery processing efficiency is indirectly improved.

Description

Battery posture changing device

Technical Field

The application relates to the technical field of automatic equipment, in particular to a battery attitude conversion device.

Background

The automatic production technology is widely applied due to high labor cost and low efficiency in the manufacturing industry, and in the process of automatic production of batteries, the battery posture changing device is generally required to adjust the posture of the batteries so as to adapt to different battery processing devices.

The battery posture changing device generally only turns the battery from a horizontal placement state to a vertical placement state, namely, turns by 90 degrees, so as to meet the requirements of the battery processing device on the battery posture, but part of the battery processing devices also have requirements on the spacing between the batteries, so that after the battery posture changing device adjusts the battery posture, the battery distance changing device is also required to be added to change the distance of a plurality of batteries.

In the prior art, in order to meet the requirements of part of battery processing devices, the battery attitude transformation device and the battery pitch-changing device are required to adjust the attitude of the battery, so that the battery attitude transformation device and the battery pitch-changing device need to occupy a larger space, and meanwhile, a transfer device is required to be additionally arranged between the battery attitude transformation device and the battery pitch-changing device, so that the battery processing device not only needs to occupy a larger space, but also increases the time for transferring the battery, and reduces the battery processing efficiency.

Disclosure of utility model

The application aims to provide a battery posture conversion device, which aims to solve the problem that in the existing battery posture conversion device, after a battery is overturned, the battery cannot be subjected to a distance-changing operation, and the battery is required to be matched with the battery distance-changing device for use, so that a large space is required to be occupied.

In order to achieve the above purpose, the application provides a battery posture changing device, which comprises a turnover module, a pitch changing module and a driving device, wherein,

The turnover module comprises a turnover frame, a clamp assembly and a first driving assembly, wherein the turnover frame is rotatably arranged, the driving assembly is in transmission connection with the turnover frame, the clamp assembly is movably installed on the turnover frame, at least two clamping parts are arranged at intervals along the rotating axis of the turnover frame, and the first driving assembly is in transmission connection with the clamp assembly;

The pitch-changing module comprises at least two fixing pieces and a second driving assembly, wherein the at least two fixing pieces are respectively movably installed on the roll-over stand and are arranged at intervals along the axis of rotation of the roll-over stand, the at least two fixing pieces are also arranged in one-to-one correspondence with the at least two clamping parts, and the second driving assembly is respectively in transmission connection with the at least two fixing pieces;

The first driving assembly drives the turnover frame to rotate, then drives the clamp assembly to move towards the direction close to the at least two fixing pieces, and transfers the battery clamped by each clamping part to the corresponding fixing piece, and the second driving assembly drives the at least two fixing pieces to change the distance.

In some embodiments of the present application, the clamp assembly includes two clamping structures slidably mounted on opposite sides of the roll-over stand, and the first driving assembly includes two first driving units, which are respectively connected with the corresponding clamping structures in a transmission manner, so that the two clamping structures can respectively move in directions approaching or separating from the at least two fixing members;

At least two clamping grooves are formed in one side, facing the other clamping structure, of each clamping structure, and the at least two clamping grooves of one clamping structure are matched with the at least two clamping grooves of the other clamping structure in a one-to-one correspondence mode, so that at least two clamping parts are formed.

In some embodiments of the present application, first guide rails are respectively disposed on two opposite sides of the roll-over stand, and the two clamping structures are respectively slidably mounted on the corresponding first guide rails.

In some embodiments of the present application, the first driving unit is disposed at one end of the first rail, and the other end of the first rail is provided with a stopper to limit the clamping structure from being separated from the first rail.

In some embodiments of the present application, each of the clamping structures includes a mounting plate slidably mounted on the roll-over stand, a clamping member movably mounted on the mounting plate, and a driving member fixedly mounted on the mounting plate and in driving connection with the clamping member to drive the clamping member to move in a direction approaching or separating from the other clamping structure, wherein the clamping groove is formed on a side of the clamping member facing the other clamping structure.

In some embodiments of the present application, each of the clamping structures further includes a guide post, one end of the guide post is fixedly connected to a side of the clamping piece away from the clamping groove, the other end of the guide post penetrates through the mounting plate, and a peripheral wall of the guide post is in sliding fit with the mounting plate.

In some embodiments of the present application, the at least two fixing members are slidably mounted on the roll-over stand, and the second driving assembly drives the at least two fixing members to slide relative to the roll-over stand, so that the at least two fixing members can be respectively close to or far away from each other along an axis of rotation of the roll-over stand, so as to drive the battery to change the distance.

In some embodiments of the present application, the roll-over stand is further provided with a second guide rail, the second guide rail and the axis of rotation of the roll-over stand are arranged in parallel, the at least two fixing pieces are respectively slidably mounted on the second guide rail, and the at least two fixing pieces are each provided with a sliding part;

The second driving assembly comprises a second driving unit and a driving plate, at least two variable-pitch guide grooves with preset tracks are arranged on the driving plate, sliding parts of the at least two fixing pieces are respectively in sliding fit with the corresponding variable-pitch guide grooves, the second driving unit is in transmission connection with the driving plate, and the driving plate is driven to move along the direction perpendicular to the rotating axis of the roll-over stand, so that the at least two fixing pieces are respectively close to or far away from each other along the rotating axis of the roll-over stand under the action of the driving plate.

In some embodiments of the present application, the roll-over stand is further provided with a third guide rail perpendicular to the axis of rotation of the roll-over stand, the driving plate is slidably mounted on the third guide rail, the second driving unit is fixedly mounted on the roll-over stand, and the driving end of the second driving unit is fixedly connected with the driving plate.

In some embodiments of the present application, each sliding portion includes a positioning post protruding from the fixing member and a bearing, the bearing is sleeved on a peripheral side of the positioning post, and the peripheral side of the bearing is in rolling contact with a side wall of the variable-pitch guide groove.

According to the technical scheme, the turnover frame is driven to rotate through the driving device, the clamp assembly on the turnover frame is driven to rotate so as to synchronously drive the battery clamped by the clamp assembly to rotate, and the turnover of the battery is realized. Therefore, compared with the prior art, the battery attitude conversion device disclosed by the application has the advantages that the turnover frame is driven to rotate by the driving device to realize the turnover of the battery, and the second driving component is used for driving the at least two fixing pieces to change the distance to realize the change of the distance of the battery, so that the battery has the functions of realizing the turnover and the change of the distance of the battery, and meanwhile, the turnover and the change of the distance of the battery do not need to be transferred between different devices, so that the transfer device and the transfer time are saved, and the processing efficiency of the battery is indirectly improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a battery attitude transformation device according to an embodiment of the present application;

FIG. 2 is a schematic view of a partial structure of the battery posture changing apparatus of FIG. 1;

FIG. 3 is a schematic view of a clamping structure of the battery attitude changing device in FIG. 1;

FIG. 4 is a schematic diagram of a pitch module of the battery attitude transformation device of FIG. 1;

Fig. 5 is another view of the pitch structure of fig. 4.

Reference numerals illustrate:

100. Battery attitude conversion device 10, turnover module 11, turnover frame 111, first guide rail 112, second guide rail 113, third guide rail 114, stop piece 12, clamp assembly 121, clamping structure 1211, mounting plate 1212, clamping piece 1213, driving piece 1214, guide post 1215, clamping groove 13, first driving assembly 20, distance changing module 21, fixing piece 211, positioning post 212, bearing 213, fixing part 22, second driving assembly 221, second driving unit 222, driving plate 223, distance changing guide slot 30 and driving device.

The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the present application, unless explicitly specified and limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, and for example, "fixed" may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.

The application provides a battery posture changing device 100, wherein the battery posture changing device 100 is used for adjusting the posture of a battery so as to adapt to the requirements of a battery processing device on the posture of the battery, and the automatic production of the battery is realized. Referring to fig. 1 to 5 in combination, in an embodiment of the present application, a battery posture changing device 100 includes a flipping module 10, a pitch changing module 20, and a driving device 30.

The turnover module 10 comprises a turnover frame 11, a clamp assembly 12 and a first driving assembly 13, wherein the turnover frame 11 is rotatably arranged, the driving device 30 is in transmission connection with the turnover frame 11, the clamp assembly 12 is movably arranged on the turnover frame 11, at least two clamping parts are arranged at intervals along the axis of rotation of the turnover frame 11, and the first driving assembly 13 is in transmission connection with the clamp assembly 12.

In an example, the battery posture changing apparatus 100 may further include a fixing frame on which the roll-over stand 11 is rotatably mounted. In another example, the battery posture changing apparatus 100 may further include a housing, and the roll-over stand 11 is rotatably installed inside the housing. In yet another example, the roll-over stand 11 is mounted on a battery automation line.

The main function of the clamp assembly 12 is to clamp the battery, so that the battery can be kept stable when the turnover frame 11 drives the battery to turn over, and the battery is prevented from falling off, therefore, the type of the clamp assembly 12 is various and is not particularly limited. It will be appreciated that one clamping portion of the clamp assembly 12 corresponds to clamping one battery, and at least two clamping portions can clamp at least two batteries, which are spaced apart along the axis of rotation of the roll-over stand 11.

The pitch-changing module 20 comprises at least two fixing pieces 21 and a second driving assembly 22, wherein the at least two fixing pieces 21 are respectively movably installed on the roll-over stand 11 and are arranged at intervals along the axis of rotation of the roll-over stand 11, the at least two fixing pieces 21 are also arranged in one-to-one correspondence with the at least two clamping parts, and the second driving assembly 22 is respectively in transmission connection with the at least two fixing pieces 21.

The at least two fixing members 21 may be movably mounted on the roll-over stand 11 in various manners, and the fixing members 21 may be swingably mounted on the roll-over stand 11, or the fixing members 21 may be slidably mounted on the roll-over stand 11. The fixing member 21 is mainly used for carrying the battery transferred by the clamp assembly 12 and is driven by the second driving assembly 22 to change the distance so as to drive the battery on the fixing member 21 to change the distance.

After the driving device 30 drives the roll-over stand 11 to rotate, the first driving assembly 13 drives the clamp assembly 12 to move towards a direction approaching to the at least two fixing pieces 21, and transfers the battery clamped by each clamping portion to the corresponding fixing piece 21, and the second driving assembly 22 drives the at least two fixing pieces 21 to change the distance.

It should be emphasized that the battery posture changing apparatus 100 generally turns the battery from the horizontally placed state to the vertically placed state, that is, 90 °, and therefore, the driving apparatus 30 may drive the roll-over stand 11 to rotate 90 °. The preferred power source for the drive means 30 is a servo motor to improve the accuracy of driving the roll-over stand 11 to rotate 90 deg..

According to the technical scheme, the turnover frame 11 can be driven to rotate through the driving device 30, the clamp assembly 12 on the turnover frame 11 is driven to rotate, so that batteries clamped by the clamp assembly 12 are synchronously driven to rotate, and the battery can be turned over. Thus, compared with the prior art, the battery posture changing device 100 of the application realizes the overturning of the battery by driving the overturning frame 11 to rotate through the driving device 30, and realizes the changing of the battery by driving the changing of the distance of at least two fixing pieces 21 through the second driving component 22, so that the battery has the overturning and changing functions of the battery, and meanwhile, the overturning and changing operations of the battery do not need to be transferred between different devices, thereby saving the transferring device and the transferring time, and indirectly improving the processing efficiency of the battery.

In some examples, as shown in fig. 1 to 3, the clamp assembly 12 includes two clamping structures 121, the two clamping structures 121 are slidably mounted on opposite sides of the roll-over stand 11, the first driving assembly 13 includes two first driving units, and the two first driving units are respectively in transmission connection with the corresponding clamping structures 121, so that the two clamping structures 121 can move in directions approaching or separating from the at least two fixing members 21, at least two clamping grooves 1215 are disposed on a side, facing the other clamping structure 121, of each clamping structure 121, and the at least two clamping grooves 1215 of one clamping structure 121 are in one-to-one correspondence with the at least two clamping grooves 1215 of the other clamping structure 121 to form at least two clamping portions.

In this embodiment, a clamping portion is formed by two opposite clamping grooves 1215, so that a gap can be left between the battery and the clamping grooves 1215, and the clamp assembly 12 can be adapted to various types of batteries. Each of the clamping slots 1215 may be provided with a resilient member, including but not limited to silicone, plastic, etc., on the slot wall away from the slot to provide a cushioning effect when clamping the battery to avoid damaging the battery.

So set up, the first drive unit that is located the upside drives the clamp structure 121 motion, make two clamp structure 121 dislocation set each other, the battery is transported to the clamp groove 1215 that is located clamp structure 121 of downside through mechanisms such as manipulator, clamping jaw, then the first drive unit that is located the upside drives clamp structure 121 motion, make two clamp structure 121 set up relatively, in order to press from both sides tight battery through two clamp structure 121, at this moment, drive arrangement 30 drives roll-over stand 11 again and rotates, overturn 90 with the battery, after the battery upset, two first drive units drive the clamp structure 121 motion that corresponds respectively, in order to transport the battery to corresponding mounting 21.

In some examples, as shown in fig. 1 and 2, opposite sides of the roll-over stand 11 are provided with first guide rails 111, respectively, and two clamping structures 121 are slidably mounted to the corresponding first guide rails 111, respectively. In the present embodiment, the first guide 111 is perpendicular to the axis of rotation of the roll-over stand 11.

The number of the first guide rails 111 may be one or two or more, and when the number of the first guide rails 111 is two or more, at least two first guide rails 111 are disposed at intervals on the axis of rotation of the roll-over stand 11. The clamping structure 121 may be slidably mounted on the first rail 111 in various manners, and the clamping structure 121 may be indirectly slidably mounted on the first rail 111 through a slider, or the clamping structure 121 may be directly slidably mounted on the first rail 111.

So configured, when the first driving unit drives the clamping structure 121 to slide, the clamping structure 121 can slide along the first guide rail 111 in a direction approaching or separating from the at least two fixing pieces 21, so that the movement of the clamping structure 121 is smoother, and the reliability of clamping the battery by the clamp assembly 12 is improved.

In some examples, as shown in fig. 1, the first driving unit is disposed at one end of the first rail 111, and the other end of the first rail 111 is provided with a stopper 114 to limit the clamping structure 121 from being separated from the first rail 111. The stop 114 includes, but is not limited to, a hydraulic damper, a stop block, a damper cylinder, and the like. With this arrangement, the problem of the first driving unit driving the clamping structure 121 away from the first rail 111, resulting in a battery falling, can be avoided.

In some examples, as shown in fig. 1 to 3, each clamping structure 121 includes a mounting plate 1211, a clamping member 1212 and a driving member 1213, the mounting plate 1211 is slidably mounted on the roll-over stand 11, the clamping member 1212 is movably mounted on the mounting plate 1211, and the driving member 1213 is fixedly mounted on the mounting plate 1211 and is in driving connection with the clamping member 1212 to drive the clamping member 1212 to move in a direction approaching or moving away from the other clamping structure 121, wherein a clamping groove 1215 is formed on a side of the clamping member 1212 facing the other clamping structure 121.

So configured, when the two clamping structures 121 are disposed opposite one another, the driving member 1213 of each clamping structure 121 can drive the clamping member 1212 in a direction toward or away from the other clamping structure 121 to clamp or release the battery.

In some examples, as shown in fig. 2 and 3, each clamping structure 121 further includes a guide post 1214, one end of the guide post 1214 is fixedly connected to a side of the clamping piece 1212 facing away from the clamping groove 1215, the other end of the guide post 1214 passes through the mounting plate 1211, and the peripheral wall of the guide post 1214 is in sliding fit with the mounting plate 1211.

The number of the guide posts 1214 may be one or two or more, and when the number of the guide posts 1214 is two or more, at least two guide posts 1214 are disposed at intervals along the length direction of the mounting plate 1211. In this embodiment, the mounting plate 1211 is provided with a sliding hole for the guide post 1214 to pass through, and the sliding hole is provided with a sleeve, so as to improve the stability of sliding fit between the guide post 1214 and the mounting plate 1211.

So configured, the driving member 1213 drives the clamping members 1212 to move closer to or farther from the other clamping structure 121 more smoothly, so that the clamping grooves 1215 of the two clamping members 1212 can rapidly clamp or release the battery.

In some examples, as shown in fig. 1 to 5, at least two fixing members 21 are slidably mounted on the roll-over stand 11, and the second driving assembly 22 drives the at least two fixing members 21 to slide relative to the roll-over stand 11, so that the at least two fixing members 21 can be respectively moved closer to or away from each other along the axis of rotation of the roll-over stand 11 to drive the battery to change the distance.

So set up, after the anchor clamps subassembly 12 transports the battery of every clamping part centre gripping to corresponding mounting 21, the second drive assembly 22 can drive at least two mounting 21 respectively and slide for roll-over stand 11, and when at least two mounting 21 was in the slip for roll-over stand 11, can adjust the interval each other between two adjacent mounting 21 to drive the battery displacement on the mounting 21.

In some examples, as shown in fig. 1 to 5, the roll-over stand 11 is further provided with a second guide rail 112, the second guide rail 112 and the axis of rotation of the roll-over stand 11 are parallel to each other, at least two fixing pieces 21 are respectively slidably mounted on the second guide rail 112, and at least two fixing pieces 21 are provided with sliding parts;

The second driving assembly 22 comprises a second driving unit 221 and a driving plate 222, at least two variable-pitch guide grooves 223 with preset tracks are arranged on the driving plate 222, sliding parts of at least two fixing pieces 21 are respectively in sliding fit with the corresponding variable-pitch guide grooves 223, the second driving unit 221 is in transmission connection with the driving plate 222 so as to drive the driving plate 222 to move along the direction perpendicular to the rotating axis of the roll-over stand 11, and the at least two fixing pieces 21 are respectively close to or far away from each other along the rotating axis of the roll-over stand 11 under the action of the driving plate 222.

The arrangement of the second guide rail 112 is similar to that of the first guide rail 111, and the specific content of the first guide rail 111 may be specifically referred to herein.

So configured, the at least two fixing members 21 can be driven by the at least two distance-varying guide grooves 223 on the driving plate 222 to move to realize distance variation, and it can be understood that the cooperation of the distance-varying guide grooves 223 and the sliding parts can realize stepless distance variation of the at least two fixing members 21, so that the battery posture changing device 100 can be suitable for different types of batteries or distance-varying operations with different distances.

In some examples, as shown in fig. 1 to 5, the roll-over stand 11 is further provided with a third guide rail 113, the third guide rail 113 is perpendicular to the axis of rotation of the roll-over stand 11, a driving plate 222 is slidably mounted on the third guide rail 113, a second driving unit 221 is fixedly mounted on the roll-over stand 11, and the driving end of the second driving unit 221 is fixedly connected with the driving plate 222.

Similarly, the third rail 113 is similar to the first rail 111, and the specific content of the first rail 111 may be specifically referred to herein.

So arranged, when the second driving unit 221 drives the driving plate 222 to slide, the driving plate 222 can move along the third guide rail 113, so that the movement of the driving plate 222 is smoother, and the efficiency and reliability of the second driving unit 221 for driving at least two fixing pieces 21 to move through the driving plate 222 are improved.

In some examples, as shown in fig. 5, each sliding portion includes a positioning column 211 protruding from the fixing member 21 and a bearing 212, the bearing 212 is sleeved on a peripheral side of the positioning column 211, and the peripheral side of the bearing 212 is in rolling contact with a side wall of the variable-pitch guide groove 223.

In this way, the friction force between the driving plate 222 and the sliding portion can be reduced, so that the smoothness of the movement of the second driving unit 221 driving at least two fixing members 21 through the driving plate 222 is improved.

In some examples, the fixing member 21 is further provided with a fixing portion 213 for carrying a battery, and the fixing portion 213 has a plurality of arrangements, the fixing portion 213 may include a plurality of U-shaped plates, when the fixing member 21 carries the battery, the battery is placed at an opening of the U-shaped plate, and the fixing portion 213 further includes two stop plates, which are respectively disposed at two ends of the fixing member 21 in the length direction.

The foregoing description is only of the optional embodiments of the present application, and is not intended to limit the scope of the application, and all the equivalent structural changes made by the description of the present application and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the application.

Claims

1. A battery posture changing device is characterized by comprising a turnover module, a distance changing module and a driving device, wherein,

2. The battery posture changing device according to claim 1, wherein the clamp assembly comprises two clamping structures which are respectively slidably mounted on two opposite sides of the roll-over stand, and the first driving assembly comprises two first driving units which are respectively in transmission connection with the corresponding clamping structures, so that the two clamping structures can respectively move towards a direction approaching or away from the at least two fixing pieces;

3. The battery posture changing device according to claim 2, wherein the opposite sides of the roll-over stand are respectively provided with first guide rails, and the two clamping structures are respectively slidably mounted on the corresponding first guide rails.

4. The battery posture changing apparatus of claim 3, wherein the first driving unit is disposed at one end of the first rail, and the other end of the first rail is provided with a stopper to restrict the clamping structure from being separated from the first rail.

5. The battery posture changing apparatus of claim 2, wherein each of the holding structures includes a mounting plate slidably mounted to the roll-over stand, a holding member movably mounted to the mounting plate, and a driving member fixedly mounted to the mounting plate and in driving connection with the holding member to drive the holding member to move in a direction approaching or moving away from the other holding structure, wherein the holding groove is formed in a side of the holding member facing the other holding structure.

6. The battery posture changing device according to claim 5, wherein each of the clamping structures further comprises a guide post, one end of the guide post is fixedly connected with one side of the clamping piece, which is away from the clamping groove, the other end of the guide post penetrates through the mounting plate, and the peripheral wall of the guide post is in sliding fit with the mounting plate.

7. The battery attitude transformation device according to claim 1, wherein the at least two fixing members are slidably mounted to the roll-over stand, respectively, and the second driving assembly drives the at least two fixing members to slide relative to the roll-over stand, respectively, so that the at least two fixing members can be respectively moved closer to or farther from each other along an axis of rotation of the roll-over stand, so as to drive the battery to change the distance.

8. The battery posture changing device according to claim 7, wherein the roll-over stand is further provided with a second guide rail, the second guide rail and the axis of rotation of the roll-over stand are arranged in parallel with each other, the at least two fixing pieces are respectively slidably mounted on the second guide rail, and the at least two fixing pieces are each provided with a sliding part;

9. The battery posture changing device according to claim 8, wherein the roll-over stand is further provided with a third guide rail perpendicular to an axis of rotation of the roll-over stand, the driving plate is slidably mounted on the third guide rail, the second driving unit is fixedly mounted on the roll-over stand, and the driving end of the second driving unit is fixedly connected with the driving plate.

10. The battery posture changing apparatus of claim 8, wherein each of the sliding portions includes a positioning post protruding from the fixing member and a bearing fitted around a peripheral side of the positioning post, the peripheral side of the bearing being in rolling contact with a side wall of the variable-pitch guide groove.