CN220672641U - Shell positioning device - Google Patents

Abstract

The utility model relates to the technical field of battery production equipment, in particular to a shell positioning device. The shell positioning device comprises a mounting piece and a shell positioning mechanism, wherein the mounting piece is provided with an avoidance opening for the shell to pass through; the shell positioning mechanisms comprise shell positioning drivers, fixing frames and shell positioning plates, and the shell positioning mechanisms are arranged on the periphery of the avoidance opening in a surrounding mode and drive the fixing frames to drive the shell positioning plates to position the periphery of the shell by using the shell positioning drivers; the shell locating plate is installed on the fixing frame in a lifting mode, so that when the shell moves downwards, the shell locating plate can move downwards along with the shell, hard friction between the shell and the shell locating plate is avoided, and the probability of damage to the shell caused by movement of the shell relative to the shell locating plate is reduced.

Description

Shell positioning device

Technical Field

The utility model relates to the technical field of battery production equipment, in particular to a shell positioning device.

Background

In the battery assembly process, the following steps are generally included: 1) And fixing the battery cell cover plate: the battery cell and the cover plate are welded and fixed through a connecting sheet to form a battery cell assembly; 2) The cell is pre-housed: filling a part of the battery core assembly into a shell to form a battery core pre-filling shell assembly; 3) The battery cell is completely put into the shell: completely pressing the battery cell in the battery cell pre-casing assembly into the casing to form a battery cell completely casing assembly; 4) And fixing a shell cover plate: and (3) positioning and welding the shell body and the cover plate in the shell assembly completely to complete the assembly of the battery.

In the step of pre-housing the battery cells in the inverted press-housing mode and the step of completely housing the battery cells, a positioning mechanism is generally required to clamp and position the housing, and then a pressing mechanism is used to drive the housing to press down to be matched with the cover plate in a sleeved mode. Because the positioning mechanism is always required to clamp and position the shell in the press fitting process, the alignment precision of the shell and the cover plate is ensured. When the shell moves, the clamping force of the clamping plate of the positioning mechanism is resisted, so that the shell cannot be pressed into the shell, and the outer wall of the shell is deformed and worn due to the friction force between the outer wall of the shell and the positioning mechanism, so that the appearance of the shell is influenced, and even the quality problem of the shell is possibly caused.

Therefore, there is a need for a housing positioning device to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a shell positioning device which solves the problems that the shell cannot be pressed into a shell due to the blocking of clamping force in the process of pressing and transporting the shell and the shell is damaged due to friction force in the process of pressing and transporting the shell.

In order to achieve the above object, the following technical scheme is provided:

a housing positioning device for positioning a housing, the housing positioning device comprising:

the mounting piece is provided with an avoidance port for the shell to pass through;

the shell positioning mechanisms are arranged on the periphery of the avoidance opening in a surrounding mode and are used for positioning at least two opposite sides of the shell; the shell positioning mechanism comprises a shell positioning driver, a fixing frame and a shell positioning plate, wherein the fixing frame is movably arranged on the mounting piece in the horizontal direction, and the shell positioning driver is arranged on the mounting piece and is used for driving the fixing frame to drive the shell positioning plate to move in the direction approaching to or far from the shell; the shell positioning plate is arranged on the fixing frame in a lifting manner, so that when the shell moves downwards, the shell positioning plate can move downwards along with the shell.

As an alternative of the housing positioning device, the housing positioning plate includes a first positioning plate and a second positioning plate, the first positioning plate is installed on the fixing frame in a liftable manner, the second positioning plate is detachably connected to the first positioning plate, and the second positioning plate can be abutted to the housing.

As an alternative to the housing positioning device, the housing positioning plate further includes a plurality of clamping elastic members, and the plurality of clamping elastic members are arranged between the first positioning plate and the second positioning plate at intervals.

As an alternative scheme of the shell positioning device, the shell positioning plate further comprises a plurality of linear guide bearings, the plurality of linear guide bearings are connected between the first positioning plate and the second positioning plate, and the extending direction of the linear guide bearings is the same as the deformation direction of the clamping elastic piece.

As an alternative of the housing positioning device, the housing positioning mechanism includes a translation guiding assembly, the translation guiding assembly includes a fourth guide rail and a fourth guide block, the fourth guide rail is disposed on the mounting member, the fourth guide block is slidably connected to the fourth guide rail, and the fourth guide block is connected to the fixing frame.

As an alternative to the housing positioning device, the second positioning plate is an insulating plate.

As an alternative scheme of the shell positioning device, the shell positioning mechanism further comprises a downward movement guiding assembly, the downward movement guiding assembly comprises a third guide rail and a third guide block which are in sliding fit, the third guide rail is fixed on the fixing frame, and the third guide block is fixedly connected with the shell positioning plate.

As an alternative to the housing positioning device, the housing positioning mechanism further includes a reset assembly for restoring the housing positioning plate to a home position.

As an alternative scheme of the shell positioning device, the reset component comprises a fixing piece, a connecting piece and an elastic reset piece, wherein a limiting groove extending along the height direction is formed in the fixing frame, and the fixing piece is fixed at any end of the limiting groove in the height direction; the first end of the connecting piece is slidably inserted into the limiting groove, and the second end of the connecting piece is fixedly connected with the shell positioning plate; one end of the elastic resetting piece is connected to the fixing piece, and the other end of the elastic resetting piece is connected to the connecting piece.

As an alternative to the housing positioning device, the housing positioning device further includes a lifting driving mechanism connected to the mounting member for driving the mounting member to lift in the height direction.

As an alternative scheme of the shell positioning device, the lifting driving mechanism comprises a lifting driver and a limiting piece, wherein the lifting driver is arranged on the workbench, and the output end of the lifting driver is connected with the mounting piece and is used for driving the mounting piece to lift along the height direction; one end of the limiting piece is installed on the workbench, and the other end of the limiting piece can be abutted with the installation piece.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model provides a shell positioning device, which comprises a mounting piece and a shell positioning mechanism, wherein the mounting piece is provided with an avoidance opening for a shell to pass through; the shell positioning mechanisms comprise shell positioning drivers, fixing frames and shell positioning plates, and the shell positioning mechanisms are arranged on the periphery of the avoidance opening in a surrounding mode and drive the fixing frames to drive the shell positioning plates to position the periphery of the shell by using the shell positioning drivers; the shell locating plate is installed on the fixing frame in a lifting mode, so that when the shell moves downwards, the shell locating plate can move downwards along with the shell, hard friction between the shell and the shell locating plate is avoided, and the probability of damage to the shell caused by movement of the shell relative to the shell locating plate is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural diagram of a battery cell pre-casing assembly according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a press-loading shell device according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a positioning device for a housing according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a housing positioning mechanism according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of another direction of the housing positioning mechanism according to the embodiment of the present utility model.

Reference numerals:

100. a cover plate; 200. a battery cell; 300. a housing;

1. a work table; 11. a bottom plate; 12. a guide post; 13. a top plate;

2. a cover plate positioning module;

3. a housing positioning device; 31. a mounting member; 311. an avoidance port; 32. a lifting driving mechanism; 321. a lifting driver; 322. a limiting piece; 33. a housing positioning mechanism; 331. a housing positioning driver; 332. a fixing frame; 3321. a limit groove; 333. a housing positioning plate; 3331. a first positioning plate; 3332. a second positioning plate; 3333. a linear guide bearing; 3334. clamping the elastic piece; 334. a reset assembly; 3341. a fixing member; 3342. a connecting piece; 3343. an elastic reset piece; 3351. a third guide rail; 3352. a third guide block; 336. a fourth guide rail;

4. and pressing down the press-fit module.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; 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. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, the terms "upper," "lower," "left," "right," and the like are used for convenience of description and simplicity of operation based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Fig. 1 shows a schematic structural diagram of a battery cell pre-housing assembly provided in this embodiment. As shown in fig. 1, the battery cell pre-casing assembly comprises a cover plate 100, a battery cell 200 and a casing 300, wherein one end of the battery cell 200 is fixedly connected with the cover plate 100, and the other end of the battery cell 200 is pressed into the casing 300. In the battery assembly process, the following steps are generally included: 1) And fixing the battery cell cover plate: the battery cell 200 and the cover plate 100 are welded and fixed through a connecting sheet to form a battery cell assembly; 2) The cell is pre-housed: filling a portion of the cell 200 of the cell assembly into the housing 300 to form a cell pre-housing assembly; 3) The battery cell is completely put into the shell: the battery cell 200 with the battery cell pre-embedded in the shell assembly is completely pressed into the shell 300 to form a battery cell completely embedded shell assembly, namely, the battery cell 200 with the battery cell completely embedded in the shell assembly is completely positioned in the shell 300, and the shell 300 is enclosed on the periphery side of the cover plate 100; 4) And fixing a shell cover plate: and (3) positioning and welding the shell 300 with the cover plate 100 in which the battery core is completely put into the shell assembly, so as to complete the assembly of the battery.

In the prior art, the step of pre-housing the battery cell and the step of completely housing the battery cell mostly adopt the vertical housing or the lateral housing, no matter whether the housing is vertically or laterally housed, the cover plate 100 and the housing 300 cannot be precisely positioned, and in the press-fitting process, the housing 300 is easily deformed, so that the precise positioning of the housing 300 and the cover plate 100 is further affected, and the welding fixation of the housing 300 and the cover plate 100 is not facilitated.

The embodiment provides a press-mounting device for positioning press-mounting of a battery cell pre-mounting shell assembly in a complete battery cell mounting step, in the press-mounting process, deformation of a shell 300 can be reduced, so that a cover plate 100 of the battery cell pre-mounting shell assembly is completely pressed into the shell 300 and is accurately matched with the shell 300, welding and fixing between a subsequent shell 300 and the cover plate 100 are facilitated, and welding quality between the shell 300 and the cover plate 100 is improved.

For convenience of description, in the present embodiment, a first direction is defined as a width direction of the battery, and a second direction is defined as a length direction of the battery, the second direction being perpendicular to the first direction. It will be appreciated that in other embodiments, the first direction may also be the length direction of the battery and the second direction the width direction of the battery.

Fig. 2 shows a schematic structural view of the press-fit case apparatus provided in the present embodiment. As shown in fig. 2, the press-fitting shell device comprises a workbench 1, a cover plate positioning module 2, a shell positioning device 3, a press-fitting pressing module 4 and a control system, wherein the cover plate positioning module 2, the shell positioning device 3 and the press-fitting pressing module 4 are all arranged on the workbench 1, and the cover plate positioning module 2 is used for bearing a battery cell pre-fitting shell assembly and positioning a cover plate 100 of the battery cell pre-fitting shell assembly; the shell positioning device 3 is used for positioning the shell 300 of the cell pre-casing assembly; the pressing-down press-fitting module 4 is used for driving the shell 300 to move downwards so as to enable the cover plate 100 to be accurately put into the shell, thereby facilitating the welding and fixing of the subsequent shell 300 and the cover plate 100 and improving the welding quality of the shell 300 and the cover plate 100; the control system is in communication connection with the cover plate positioning module 2, the shell positioning device 3 and the pressing-down press-fitting module 4, so that automatic press-fitting operation is realized, and the battery assembly efficiency is improved.

In the press-fitting process, the battery cell pre-casing assembly is placed on the cover plate positioning module 2 in a downward posture of the cover plate 100, the cover plate positioning module 2 positions the cover plate 100, the casing positioning device 3 positions the casing 300, and the press-fitting module 4 is used for driving the casing 300 to move downwards until the casing 300 is completely sleeved on the battery cell 200 and is accurately matched with the cover plate 100 to form the battery cell complete casing assembly. Finally, the battery cell is completely put into the shell assembly by a manual or mechanical arm, taken out and transferred to a welding station, and the shell 300 and the cover plate 100 are welded and fixed.

In this embodiment, the workbench 1 includes a bottom plate 11, a guide pillar 12 and a top plate 13, where the bottom plate 11 and the top plate 13 are arranged in parallel at intervals, a space between the bottom plate 11 and the top plate 13 is a press-fit space, and the guide pillar 12 is used for connecting the bottom plate 11 and the top plate 13. So set up, can enough guarantee the structural strength of workstation 1, can be convenient for the installation of apron positioning module 2, casing positioner 3 and push-fit module 4 on workstation 1 again. In other embodiments, the bottom plate 11 and the top plate 13 may be disposed in a non-parallel manner, and may be specifically designed according to the needs, which is not limited herein.

Fig. 3 shows a schematic structural view of the case positioning device 3 provided in the present embodiment. As shown in fig. 3 in combination with fig. 2, the housing positioning device 3 includes a mounting member 31, a lifting driving mechanism 32 and a plurality of housing positioning mechanisms 33, where the mounting member 31 is installed on the guide post 12 of the workbench 1 in a lifting manner and located above the cover positioning module 2, and the lifting driving mechanism 32 is used to drive the mounting member 31 to lift along the height direction, so that the mounting member 31 has a press-fit lower limit surrounding the periphery of the housing 300 and avoidance positions avoiding the housing 300. The mounting member 31 is provided with an avoidance hole 311 through which the housing 300 passes, and four housing positioning mechanisms 33 are arranged around the avoidance hole 311 for positioning the periphery of the housing 300. When the battery core is pre-loaded on the shell assembly, the lifting driving mechanism 32 drives the mounting piece 31 to ascend to avoid avoiding the yielding position of the shell 300, the cover plate positioning module 2 stretches out to the upper material level along the first direction, after the battery core is pre-loaded on the cover plate positioning module 2, the cover plate positioning module 2 retracts to the press-fit position along the first direction, then the lifting driving mechanism 32 drives the mounting piece 31 to descend to the press-fit lower limit, and the shell positioning mechanism 33 is arranged on the periphery of the shell 300 in a surrounding mode and positions the shell 300. Of course, in other embodiments, in order to facilitate the feeding of the battery cell pre-feeding housing assembly, the bottom plate 11 of the workbench 1 may be lifted relative to the top plate 13, which also can achieve the above effects, and will not be described herein. Of course, in other embodiments, the housing positioning mechanism 33 is any number of two or more, and is not limited herein.

The lifting driving mechanism 32 comprises a lifting driver 321, the lifting driver 321 is mounted on the bottom plate 11 of the workbench 1, and an output end of the lifting driver 321 is connected with the mounting piece 31 and is used for driving the mounting piece 31 to lift along the guide post 12. Illustratively, the lift actuator 321 is a linear cylinder or a linear hydraulic cylinder.

To limit the press-fit lower limit of the mounting member 31, the lift driving mechanism 32 includes a limit member 322 (see fig. 2), one end of the limit member 322 is mounted on the bottom plate 11 of the table 1, and the other end of the limit member 322 can abut against the mounting member 31. In other embodiments, the height of the limiting member 322 is adjustable, so that the limiting member 322 can be used for the press-fitting operation of batteries with different heights. Of course, in other embodiments, the press-fit lower limit of the mounting member 31 is defined, and other manners may be adopted, which are not limited herein.

With continued reference to fig. 3, the four housing positioning mechanisms 33 correspond to four sides of the housing 300, respectively, that is, two housing positioning mechanisms 33 are symmetrically disposed at intervals along the first direction, and two housing positioning mechanisms 33 are symmetrically disposed at intervals along the second direction. The four housing positioning mechanisms 33 may have the same or different structures, as long as the four sides of the housing 300 can be positioned. In the present embodiment, the structural operation principle of the four housing positioning mechanisms 33 is the same, and the difference is only that the structural dimensions of the four housing positioning mechanisms 33 are different. For the sake of easy understanding, the case positioning mechanism 33 corresponding to the side surface of the case 300 where the long side is located will be described as an example.

Fig. 4 shows a schematic structural view of the housing positioning mechanism 33 provided in this embodiment in one direction. As shown in fig. 4 in combination with fig. 3, the case positioning mechanism 33 includes a case positioning driver 331, a fixing frame 332, and a case positioning plate 333, the case positioning driver 331 is mounted on the mounting member 31, the fixing frame 332 is movably mounted on the mounting member 31 in the first direction, and the case positioning plate 333 is mounted on the fixing frame 332. When the housing 300 is positioned, the housing positioning driver 331 drives the fixing frame 332 to move in a direction approaching the housing 300 in the first direction, so that the housing positioning plate 333 clamps the positioning housing 300.

Further, the housing positioning plate 333 includes a first positioning plate 3331 and a second positioning plate 3332, the first positioning plate 3331 is installed on the fixing frame 332 in a height direction in a liftable manner, and the second positioning plate 3332 is detachably and fixedly connected with the first positioning plate 3331. Thus, when the second positioning plate 3332 is worn, the second positioning plate 3332 can be removed and replaced to avoid uneven scratch or abrasion on the surface of the second positioning plate 3332. Further, in order to ensure that the first positioning plate 3331 can stably lift, the first positioning plate 3331 is matched with the fixing frame 332 through a linear guide rail.

In this embodiment, the first positioning plate 3331 is made of a metal plate, which has good structural strength and can increase the service life of the first positioning plate 3331. The second positioning plate 3332 is an insulating plate, preferably a PEEK plate (polyetheretherketone plate), which is a high-performance, high-temperature resistant, semi-crystalline thermoplastic with excellent wear resistance and very good mechanical properties. The PEEK plates can both extend service life and reduce wear to the housing 300.

In order to avoid the casing positioning plate 333 from damaging the casing 300, the casing positioning plate 333 further includes a plurality of clamping elastic members 3334, and six clamping elastic members 3334 are disposed between the first positioning plate 3331 and the second positioning plate 3332 to avoid damaging the casing 300 due to hard collision between the casing positioning plate 333 and the casing 300 or deformation of the casing 300 caused by excessive clamping of the casing 300 by the casing positioning plate 333. Further, the housing locating plate 333 further includes a plurality of linear guide bearings 3333, four linear guide bearings 3333 are further disposed between the first locating plate 3331 and the second locating plate 3332, and the four linear guide bearings 3333 are disposed at four corners of the first locating plate 3331 respectively, so that the housing locating plate 333 can be clamped and located linearly to the housing 300 by matching the clamping elastic member with the linear guide bearings 3333, so as to avoid damage to the housing 300 caused by hard collision between the housing locating plate 333 and the housing 300, and maintain stability of telescopic movement of the second locating plate 3332 relative to the first locating plate 3331 and stability of the position of the second locating plate 3332 relative to the first locating plate 3331. Of course, in other embodiments, the number of clamping springs 3334 may be any other number, and the number of linear guide bearings 3333 may be any other number, without limitation.

In order to avoid the case being blocked by the clamping force of the case positioning plate 333 during the pressing process, the case positioning plate 333 is installed on the fixing frame 332 in a height direction in a liftable manner. The housing positioning mechanism 33 further includes a downward moving guide assembly, where the downward moving guide assembly includes a third guide rail 3351 and a third guide block 3352 that are in sliding fit, the third guide rail 3351 is fixed on the fixing frame 332, and the third guide block 3352 is fixedly connected with the housing positioning plate 333. So set up, when casing 300 is prepared to push down casing 300 after the location all around, casing locating plate 333 is along with casing 300 rectilinear motion down, realizes the synchronous motion of casing locating plate 333 and casing 300 to can avoid the casing to push down the in-process and receive the frustration of casing locating plate 333 clamping force and lead to unable completion to press into the shell, can reduce the frictional force between casing 300 and the casing positioning mechanism 33, avoid casing 300 to take place to warp because of the frictional force, and improve the income shell precision of press into the in-process casing.

Fig. 5 shows a schematic structural view of the housing positioning mechanism 33 provided in this embodiment in another direction. As shown in fig. 5 in combination with fig. 3, the housing positioning mechanism 33 further includes a reset component 334, where the reset component 334 includes a fixing component 3341, a connecting component 3342 and an elastic reset component 3343, a limiting groove 3321 extending along the height direction is provided on the fixing component 332, the fixing component 3341 is fixed on the fixing component 332 and located above the limiting groove 3321, a first end of the connecting component 3342 is slidably inserted into the limiting groove 3321, a second end of the connecting component 3342 is fixedly connected with the housing positioning plate 333, one end of the elastic reset component 3343 is connected to the fixing component 3341, and the other end is connected to the connecting component 3342, so as to ensure that the housing positioning plate 333 can automatically reset after being pushed down along with the housing 300. When the lower press-fit module 4 drives the housing 300 to move downwards, the housing positioning plate 333 can move downwards along with the housing 300 linearly, the connecting piece 3342 moves in the limiting groove 3321, and then the elastic restoring piece 3343 is pulled to stretch through the connecting piece 3342, and when the pressure of the lower press-fit module 4 is removed, the housing positioning plate 333 can be restored to the original position under the elastic force of the elastic restoring piece 3343. So through the cooperation of reset subassembly 334 downshifting guide assembly can make casing locating plate 333 take place flexible straight line along with casing 300 and push down the motion, can prevent to take place hard friction between casing 300 and the casing positioning mechanism 33, avoid casing 300 to take place to warp because of hard friction, can also improve the income shell precision of press-in shell in-process casing 300, can also improve the accuracy nature that casing locating plate 333 reset.

Further, the housing positioning mechanism 33 includes a translation guiding assembly, the translation guiding assembly includes a fourth guide rail 336 and a fourth guide block, the fourth guide rail 336 is disposed on the mounting member 31, the fourth guide block is slidably connected to the fourth guide rail 336, and the fourth guide block is connected to the fixing frame 332, so that the guiding function is performed in the process that the fixing frame 332 is driven by the housing positioning driver 331 to move along the first direction towards the direction close to or far from the housing 300, and the movement stability and accuracy are improved.

Note that in the description of this specification, a description referring to the terms "one embodiment," "in other embodiments," and the like 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 utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing description is only of the preferred embodiments of the utility model and the technical principles employed. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (10)

1. A housing positioning device for positioning a housing (300), the housing positioning device comprising:

the mounting piece (31), the mounting piece (31) is provided with an avoidance port (311) for the shell (300) to pass through;

the shell positioning mechanisms (33) are arranged on the periphery of the avoidance opening (311) in a surrounding mode, and are used for positioning at least two opposite sides of the shell (300); the shell positioning mechanism (33) comprises a shell positioning driver (331), a fixing frame (332) and a shell positioning plate (333), wherein the fixing frame (332) is movably arranged on the mounting piece (31) along the horizontal direction, the shell positioning driver (331) is arranged on the mounting piece (31) and is used for driving the fixing frame (332) to drive the shell positioning plate (333) to move towards or away from the shell (300); the housing positioning plate (333) is liftably mounted on the fixing frame (332) so that the housing positioning plate (333) can move downward together with the housing (300) when the housing (300) moves downward.

2. The housing positioning device according to claim 1, wherein the housing positioning plate (333) comprises a first positioning plate (3331) and a second positioning plate (3332), the first positioning plate (3331) is liftably mounted on the fixing frame (332), the second positioning plate (3332) is detachably connected to the first positioning plate (3331), and the second positioning plate (3332) can be abutted with the housing (300).

3. The housing positioning device according to claim 2, wherein the housing positioning plate (333) further comprises a number of clamping springs, the number of clamping springs being arranged spaced between the first positioning plate (3331) and the second positioning plate (3332).

4. A housing positioning device according to claim 3, wherein the housing positioning plate (333) further comprises a plurality of linear guide bearings (3333), wherein the plurality of linear guide bearings (3333) are connected between the first positioning plate (3331) and the second positioning plate (3332), and wherein the linear guide bearings (3333) extend in the same direction as the deformation direction of the clamping elastic member.

5. The housing positioning device according to claim 1, wherein the housing positioning mechanism (33) comprises a translational guide assembly comprising a fourth guide rail (336) and a fourth guide block, the fourth guide rail (336) being provided on the mounting member (31), the fourth guide block being slidably connected to the fourth guide rail (336) and the fourth guide block being connected to the fixing frame (332).

6. The housing positioning device according to any one of claims 1-5, wherein the housing positioning mechanism (33) further comprises a downward movement guiding assembly comprising a third guide rail (3351) and a third guide block (3352) in sliding fit, the third guide rail (3351) being fixed on the fixing frame (332), the third guide block (3352) being fixedly connected with the housing positioning plate (333).

7. The housing positioning device according to any one of claims 1-5, wherein the housing positioning mechanism (33) further comprises a reset assembly (334), the reset assembly (334) being adapted to restore the housing positioning plate (333) to its original position.

8. The positioning device according to claim 7, wherein the reset assembly (334) comprises a fixing member (3341), a connecting member (3342) and an elastic reset member (3343), the fixing frame (332) is provided with a limiting groove (3321) extending along the height direction, and the fixing member (3341) is fixed on the fixing frame (332) and is positioned above the limiting groove (3321); the first end of the connecting piece (3342) is slidably inserted into the limit groove (3321), and the second end of the connecting piece (3342) is fixedly connected with the shell positioning plate (333); one end of the elastic resetting piece (3343) is connected to the fixing piece (3341), and the other end of the elastic resetting piece is connected to the connecting piece (3342).

9. The housing positioning device according to any one of claims 1-5, further comprising a lifting drive mechanism (32), the lifting drive mechanism (32) being connected to the mounting member (31) for driving the mounting member (31) to lift in a height direction.

10. The housing positioning device according to claim 9, wherein the lifting drive mechanism (32) comprises a lifting drive (321) and a limiting member (322), the lifting drive (321) is mounted on the workbench (1), and an output end of the lifting drive (321) is connected with the mounting member (31) and is used for driving the mounting member (31) to lift in the height direction; one end of the limiting piece (322) is installed on the workbench (1), and the other end of the limiting piece (322) can be abutted with the installation piece (31).