CN214978622U

CN214978622U - Prewelding clamp

Info

Publication number: CN214978622U
Application number: CN202120677252.3U
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuxi Lead Intelligent Equipment Co Ltd
Current assignee: Wuxi Lead Intelligent Equipment Co Ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-12-03
Anticipated expiration: 2031-04-02

Abstract

The utility model relates to a pre-welding fixture, which comprises a base, a top cover and a shell, wherein the base is provided with a through hole for the shell and the top cover to pass in and out; the welding base is arranged on one side of the base and is opposite to the through hole, and the welding base can be abutted against the shell and the top cover along a first direction; the positioning assembly is positioned between the base and the welding base and arranged around the through hole, and the positioning assembly can be abutted against the shell and the top cover in a first plane vertical to the first direction; the welding base is provided with a hole part, and the hole part is used for exposing the position of a part of welding line between the shell and the top cover. The utility model provides a prewelding anchor clamps, cooperation through locating component and welding pedestal can realize the location to casing and top cap to avoid the welding seam between casing and the top cap to open, and the hole portion only shows partial welding seam position, has avoided other non-welding seam positions of laser welding equipment harm.

Description

Prewelding clamp

Technical Field

The utility model relates to a battery manufacture equipment technical field especially relates to a prewelding anchor clamps.

Background

The battery component mainly comprises a battery core, a shell and a top cover, wherein the battery core is placed into the shell firstly during assembly, then the top cover seals the opening of the shell, and then the circular seam between the shell and the top cover is welded to realize the sealing between the shell and the top cover.

The existing welding mode is generally laser welding, laser moves along a circular seam to weld the circular seam of the shell and the top cover, but in the welding process, the movement path of the laser or a battery is easy to deviate, and further the top cover is damaged.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a pre-welding fixture for avoiding damage to the top cover during laser welding, aiming at the problem that the movement path of laser or the battery is easy to deviate during laser welding of the shell and the top cover of the existing battery, and further the top cover is damaged.

The application provides a prewelding anchor clamps for centre gripping casing and top cap, prewelding anchor clamps include:

the base is provided with a through hole for the shell and the top cover to pass in and out;

the welding base is arranged on one side of the base and is opposite to the through hole, and the welding base can be abutted against the shell and the top cover along a first direction; and

the positioning assembly is positioned between the base and the welding base and arranged around the through hole, and the positioning assembly can be abutted against the shell and the top cover in a first plane vertical to the first direction;

the welding base is provided with a hole part, and the hole part is used for exposing the position of a part of welding line between the shell and the top cover.

In one embodiment, the positioning assembly includes at least two first positioning parts and at least two second positioning parts, the at least two first positioning parts are oppositely arranged along a second direction, the at least two second positioning parts are oppositely arranged along a third direction, and the at least two first positioning parts and the at least two second positioning parts enclose a fixing space for fixing the housing and the top cover;

wherein the second direction is perpendicular to the third direction and both lie in the first plane.

In one embodiment, the positioning assembly further comprises a first positioning driving assembly and a second positioning driving assembly, wherein the first positioning driving assembly is used for driving the at least two first positioning pieces to move towards or away from each other along the second direction;

the second positioning driving assembly is used for driving the at least two second positioning parts to approach or move away from each other along the third direction.

In one embodiment, the positioning assembly further comprises a regulating valve, the regulating valve is connected with the first positioning driving assembly and the second positioning driving assembly, and the regulating valve is used for regulating the output quantity of the first positioning driving assembly and the second positioning driving assembly.

In one embodiment, the pre-welding fixture further comprises a first guide part and a second guide part, the first guide part and the second guide part are both mounted on the base, the welding base is matched with the first guide part, the first guide part can guide the welding base to move along the second direction under the action of external force, the welding base is matched with the second guide part, and the second guide part can guide the welding base to move along the third direction under the action of external force.

In one embodiment, the pre-welding fixture further comprises a first resetting structure and a second resetting structure, the first resetting structure is arranged between the base and the welding base, and the first resetting structure is used for providing restoring force for the welding base to move to a first initial position along the second direction;

the second resetting structure is arranged between the base and the welding base and used for providing restoring force for the welding base to move to a second initial position along the third direction.

In one embodiment, the pre-welding fixture further comprises a first reference part and a second reference part, the first reference part is arranged between the base and the welding base and is opposite to the first resetting structure along the second direction, and the first reference part can be abutted against the welding base along the second direction to limit the movement of the welding base;

the second reference part is arranged between the base and the welding base and is opposite to the second resetting structure along the third direction, and the second reference part can abut against the welding base along the third direction so as to limit the movement of the welding base.

In one embodiment, a positioning concave part is arranged on one side of the welding base facing the base and can be matched with a matching convex part on the top of the top cover to position the top cover; and/or

One side of the welding base facing the base is provided with a positioning convex part, and the positioning convex part can be matched with the matching concave part at the top of the top cover so as to position the top cover.

In one embodiment, the hole portion includes a plurality of sub-hole portions arranged in a ring shape to expose a plurality of weld positions in a circumferential direction of the housing and the top cover.

In one embodiment, the pre-welding fixture is further provided with a heat conducting member, the heat conducting member is arranged on the positioning assembly, and the heat conducting member is used for being in contact with the shell or the top cover so as to conduct heat of the shell or the top cover.

According to the pre-welding fixture, the shell and the top cover move towards the welding base from the through hole of the base, the top cover is abutted to the welding base, the positioning assembly is used for positioning the periphery of the shell and the top cover, and then the laser welding equipment acts on the welding seam position of the shell and the top cover through the hole part. The utility model provides a prewelding anchor clamps, through locating component and welding pedestal's cooperation, can realize the location to casing and top cap to avoid the welding seam between casing and the top cap to open, and the hole portion only shows partial welding seam position, has avoided other non-welding seam positions of laser welding equipment harm.

Drawings

Fig. 1 is a schematic structural view of a pre-welding fixture for removing a welding base according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the pre-welding fixture shown in FIG. 1;

fig. 3 is a schematic structural diagram of a welding base according to an embodiment of the present invention;

FIG. 4 is a front view of the pre-welding fixture of FIG. 2;

fig. 5 is a schematic side view of the pre-welding jig shown in fig. 2.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.

Fig. 1 shows a schematic structural diagram of a pre-welding fixture for removing a welding base in an embodiment of the present invention, and fig. 2 shows a schematic structural diagram of the pre-welding fixture shown in fig. 1. For the purpose of illustration, the drawings show only the structures associated with embodiments of the invention.

Referring to the drawings, an embodiment of the present invention provides a pre-welding fixture 100 for clamping a housing 200 and a top cap 300, the pre-welding fixture 100 including a base 10, a welding base 20, and a positioning assembly 30. In the embodiments of the present application, the pre-welding fixture 100 is applied to a battery, and particularly to a case and a top cover for clamping the battery, and in other embodiments, the pre-welding fixture 100 may be applied to other structures that can be applied to the pre-welding fixture, and is not limited herein.

The base 10 is provided with a through hole for the housing 200 and the top cover 300 to enter and exit, the welding base 20 is disposed on one side of the base 10 and is disposed opposite to the through hole, the welding base 20 can abut against the housing 200 and the top cover 300 along a first direction, the positioning assembly 30 is disposed between the base 10 and the welding base 20 and is disposed around the through hole, the positioning assembly 30 can abut against the housing 200 and the top cover 300 in a first plane perpendicular to the first direction, wherein the welding base 20 is provided with a hole portion 21, and the hole portion 21 is used for exposing a part of a welding seam position between the housing 200 and the top cover 300. Specifically, the welding base 20 may abut against the top cover 300 and the case 200 in a vertical direction to position the top cover 300 and the case 200 in the vertical direction, and the positioning member 30 may abut against the case 200 and the top cover 300 in a horizontal plane to position the case 200 and the top cover 300 in the horizontal plane.

In this way, the housing 200 and the top cover 300 are moved from the through hole of the base 10 toward the welding base 20, the top cover 300 is abutted against the welding base 20, and the positioning assembly 30 is used to position the periphery of the housing 200 and the top cover 300, at this time, the position of the weld between the housing 200 and the top cover 300 is aligned with the hole portion 21, and then the laser welding device acts on the position of the weld between the housing 200 and the top cover 300 through the hole portion 21. The prewelding fixture 100 of the application can realize the positioning of the shell 200 and the top cover 300 through the matching of the positioning component 30 and the welding base 20, so that the welding seam between the shell 200 and the top cover 300 is prevented from being opened, the hole part 21 only exposes part of the welding seam position, and other non-welding seam positions of the laser welding equipment are prevented from being damaged.

In the embodiment of the present application, the base 10 supports the welding base 20 and the positioning assembly 30, and specifically, the base 10 may have a plate shape, and a through hole is formed in the middle of the base 10.

As shown in fig. 3, in some embodiments, the welding base 20 is provided with a positioning portion 22 on a side facing the base 10, and the positioning portion 22 can be matched with a matching portion on the top of the top cover 300 to position the top cover, so as to ensure that the welding seam between the housing 200 and the top cover 300 is accurately exposed in the hole portion 21. Specifically, the engagement of the positioning portion 22 with the engagement portion can position the top cover 300 in the second direction and the third direction. More specifically, the second direction and the third direction are perpendicular and both lie within the first plane.

In one embodiment, the positioning portion 22 includes a positioning concave portion 221, and the engaging portion includes an engaging convex portion engaged with the positioning concave portion 221. In other embodiments, the positioning portion 22 includes a positioning protrusion 222, and the mating portion includes a mating recess that mates with the positioning protrusion 222. In other embodiments, the positioning portion 22 of the welding base 20 may be a combination of the above two ways, which is not limited herein. The positioning concave portion 221 and the positioning convex portion 222 are simple in structure, and the structural features of the top cover 300 can be sufficiently utilized. Specifically, the positioning concave portion 221 and the mating convex portion can be engaged with each other, and the positioning convex portion 222 and the mating concave portion can be engaged with each other.

In some embodiments, the hole portion 21 is provided around the positioning portion 22. Thus, the positions of the hole portions 21 and the weld positions do not interfere with each other.

In some embodiments, the hole portion 21 includes a plurality of sub-hole portions 211, and the plurality of sub-hole portions 211 are annularly arranged to expose a plurality of weld locations along the circumferential direction of the housing 200 and the top cover 300. Providing a plurality of sub-hole portions 211 enables the housing 200 and the top cover 300 to be pre-welded reliably. Specifically, the sub-hole parts 211 include at least four, wherein at least two sub-hole parts 211 are provided at opposite sides of the case 200 and the top cover 300 in a width direction thereof, and wherein at least two sub-hole parts 211 are provided at opposite sides of the case 200 and the top cover 300 in a length direction thereof.

It should be noted that, according to the requirements of the machining precision and the welding precision, each sub-hole portion 211 may expose one weld joint position, or may expose a plurality of weld joint positions, which is not limited herein.

Referring to fig. 1 again, in some embodiments, the positioning assembly 30 includes at least two first positioning members 31 and at least two second positioning members 32, the at least two first positioning members 31 are disposed oppositely along the second direction, the at least two second positioning members 32 are disposed oppositely along the third direction, and the at least two first positioning members 31 and the at least two second positioning members 32 enclose a positioning space of the positioning housing 200 and the top cover 300, and the positioning space faces the through hole. Thus, the positioning assembly 30 can act on four sides of the housing 200 and the top cover 300, so that the peripheral forces of the housing 200 and the top cover 300 can be uniformly applied, the positioning is reliable, and the weld seam between the housing 200 and the top cover 300 can be ensured to be small. Specifically, the first direction and the second direction are both parallel to the horizontal plane. More specifically, after the housing 200 and the top cover 300 are positioned, the second direction is a width direction of the housing 200 and the top cover 300, and the third direction is a length direction of the housing 200 and the top cover 300. In some embodiments, the first positioning members 31 located at each side of the housing 200 and the top cover 300 along the third direction include at least two, so that when the housing 200 and the top cover 300 are large in size along the third direction, that is, the length direction, it is avoided that only one first positioning member 31 is used to apply force to the housing 200 and the top cover 300, and other positions far away from the force application point cannot be guaranteed to abut against the housing 200 and the top cover 300 due to lack of external force, thereby ensuring the welding effect.

Further, the positioning assembly 30 further includes a first positioning driving assembly and a second positioning driving assembly, the first positioning driving assembly is configured to drive the at least two first positioning members 31 to approach or move away from each other along the second direction, and the second positioning driving assembly is configured to drive the at least two second positioning members 32 to approach or move away from each other along the third direction. Specifically, the first positioning driving assembly includes at least two first positioning driving members 33, each first positioning driving member 33 can drive a corresponding first positioning member 31, the second positioning driving assembly includes at least two second positioning driving members 34, each second positioning driving member 34 can drive a corresponding second positioning member 32, in other embodiments, one first positioning driving member 33 can also drive at least two first positioning members 31, and one second positioning driving member 34 can also drive at least two second positioning members 32, which is not limited herein.

In some embodiments, the positioning assembly 30 further comprises a regulating valve 35, the regulating valve 35 is connected to the first positioning driving assembly and the second positioning driving assembly, and the regulating valve 35 is used for regulating the output of the first positioning driving assembly and the second positioning driving assembly. So, can make first location drive assembly and second location drive assembly's drive precision higher to, can send warning information through governing valve 35 when output fluctuation appears in first location drive assembly and second location drive assembly, so that the staff in time adjusts.

The first positioning driving member 33 and the second positioning driving member 34 may be air cylinders, and the regulating valve 35 may be a pressure regulating valve.

As shown in fig. 4 and 5, in some embodiments, the pre-welding jig 100 further includes a first guide 40 and a second guide 50, the first guide 40 and the second guide 50 are both mounted on the base 10, the welding base 20 is engaged with the first guide 40, the first guide 40 can guide the welding base 20 to move in the second direction under an external force, the welding base 20 is engaged with the second guide 50, and the second guide 50 can guide the welding base 20 to move in the third direction under an external force. Specifically, the welding base 20 is slidably fitted with the first guide 40, and the welding base 20 is slidably fitted with the second guide 50.

Thus, when the first positioning element 31 abuts against the housing 200 and the top cover 300 along the second direction under the action of the first positioning driving element 33, if the positions of the housing 200 and the top cover 300 deviate from the first preset position, because the top cover 300 is limited by the welding base 20 at this time, the first positioning element 31 will push the top cover 300 and drive the welding base 20 to move to the first preset position along the second direction, at this time, the welding base 20 can move relative to the base 10 under the guidance of the first guiding element 40, and similarly, when the second positioning element 32 abuts against the housing 200 and the top cover 300 along the third direction under the action of the second positioning driving element 34, if the positions of the housing 200 and the top cover 300 deviate from the second preset position, because the top cover 300 is limited by the welding base 20 at this time, the second positioning element 32 will push the top cover 300 and drive the welding base 20 to move to the second preset position along the third direction, at this time, the welding base 20 can move relative to the base 10 under the guidance of the second guiding member 50, so that it can be avoided that the first positioning member 31 and the second positioning member 32 cannot clamp the housing 200 and the top cover 300 when the housing 200 and the top cover 300 have a deviation in the external form and specification, or the first positioning member 31 and the second positioning member 32 cannot push the housing 200 and the top cover 300 to the corresponding first preset position and second preset position when the housing 200 and the top cover 300 have a deviation in the feeding position. It should be noted that the first preset position and the second preset position refer to positions where, after the battery is positioned with the welding base 20, the first positioning member 31 and the second positioning member 32 clamp the periphery of the battery, which may cause the welding base 20 to move in a horizontal plane along with the battery, and finally the battery reaches an accurate welding station.

Referring to fig. 1 again, the pre-welding fixture 100 further includes a first restoring structure 60 and a second restoring structure 70, the first restoring structure 60 is disposed between the base 10 and the welding base 20, the first restoring structure 60 is configured to provide a restoring force to the welding base 20 to move along the second direction to the first initial position, the second restoring structure 70 is disposed between the base 10 and the welding base 20, and the second restoring structure 70 is configured to provide a restoring force to the welding base 20 to move along the third direction to the second initial position. In this way, after the welding of the housing 200 and the top cover 300 is finished and the housing 200 and the top cover 300 are released by the first positioning member 31 and the second positioning member 32, the welding base 20 can be restored to the initial position by the restoring force of the first restoring structure 60 and the second restoring structure 70, so as to weld the next housing 200 and the top cover 300. It should be noted that the initial position referred to herein is the initial position of the welding base 20 when the battery is not positioned by the pre-welding jig 100. Specifically, the first reduction structures 60 include at least two, at least two first reduction structures 60 are located on the same side of the welding base 20 along the second direction, and the second reduction structures 70 include at least two, at least two second reduction structures 70 are located on the same side of the welding base 20 along the third direction. Thus, the resetting of the welding base 20 is stable and reliable.

In particular to the embodiment of the present application, the first return structure 60 comprises a first elastic return element 61, and the second return structure 70 comprises a second elastic return element 71. Specifically, the first elastic restoring member 61 and the second elastic restoring member 71 may be springs or other elastic structures, which are not limited herein.

Further, the first reset structure 60 includes a first guiding rod 62 extending along the second direction, the first elastic reset piece 61 is sleeved on the first guiding rod 62, the second reset structure 70 includes a second guiding rod 72 extending along the third direction, and the second elastic reset piece 62 is sleeved on the second guiding rod 72. The guide rod can ensure the reliable reset direction of the elastic reset piece.

Furthermore, the first reset structure 60 includes a first abutting portion 63, the first abutting portion 63 is located on one side of the first guiding rod 62 away from the welding base 20 along the second direction, and is connected to the first guiding rod 62, and two ends of the first elastic reset piece 61 along the second direction abut against the first abutting portion 63 and the welding base 20, respectively. The second reset structure 70 includes a second abutting portion 73, the second abutting portion 73 is located on one side of the second guide rod 72 away from the welding base 20 along the third direction, and is connected to the second guide rod 72, and two ends of the second elastic reset piece 71 along the third direction abut against the second abutting portion 73 and the welding base 20 respectively.

In some embodiments, the pre-welding fixture 100 further includes a first reference member 80 and a second reference member 90, the first reference member 80 is disposed between the base 10 and the welding base 20 and is opposite to the first resetting structure 60 along the second direction, the first reference member 80 can abut against the welding base 20 along the second direction to limit the movement of the welding base 20, the second reference member 90 is disposed between the base 10 and the welding base 20 and is opposite to the second resetting structure 70 along the third direction, and the second reference member 90 can abut against the welding base 20 along the third direction to limit the movement of the welding base 20. Thus, the limit position of one side of the welding base 20 is limited by the first reference part 80, and when the shell 200 and the top cover 300 interact with the first positioning part 31, the welding base 20 can only be driven to move along the second direction to the direction away from the first reference part 80, so that the adjustment requirement is simplified, and the welding base 20 is prevented from deviating from the first preset position when being reset. Similarly, the limit position of one side of the welding base 20 is limited by the second reference member 90, and when the housing 200 and the top cover 300 interact with the second positioning member 32, the welding base 20 can only be driven to move in the direction away from the second reference member 90 along the third direction, so that the adjustment requirement is simplified, and the welding base 20 is prevented from deviating from the second preset position when being reset.

In some embodiments, the first positioning element 31 located at one side in the second direction may be fixedly disposed, the first positioning element 31 located at the other side in the second direction may be moved in the second direction, the first reference element 80 may be disposed opposite to the fixedly disposed first positioning element 31 in the second direction, the second positioning element 32 located at one side in the third direction may be fixedly disposed, the second positioning element 32 located at the other side in the third direction may be moved in the third direction, and the second reference element 90 may be disposed opposite to the fixedly disposed second positioning element 32 in the third direction. Specifically, the fixed positioning member is used as a reference positioning member, and when the movable positioning member pushes the battery, the battery moves toward the fixed positioning member and naturally moves away from the reference member, so that the reference member and the fixed positioning member are arranged opposite to each other.

In some embodiments, the pre-welding fixture 100 further includes a heat conducting member 95, the heat conducting member 95 is disposed on the positioning assembly 30, and the heat conducting member 95 is configured to contact the housing 200 or the top cover 300 to conduct heat of the housing 200 or the top cover 300. Specifically, the heat conductive member 95 includes a copper block. In one embodiment, the heat-conducting members 95 include a plurality of heat-conducting members 95, and the plurality of heat-conducting members 95 are respectively disposed at the ends of the first positioning member 31 and the second positioning member 32.

The embodiment of the utility model provides a prewelding anchor clamps 100 compares in prior art, has following beneficial effect:

the housing 200 and the top cover 300 are moved from the through hole of the base 10 toward the welding base 20, the top cover 300 is pressed against the welding base 20, and the positioning assembly 30 is used to position the housing 200 and the top cover 300, and then the laser welding apparatus acts on the welding position of the housing 200 and the top cover 300 through the hole portion 21. The prewelding fixture 100 of the application can realize the positioning of the shell 200 and the top cover 300 through the matching of the positioning component 30 and the welding base 20, so that the welding seam between the shell 200 and the top cover 300 is prevented from being opened, the hole part 21 only exposes part of the welding seam position, and other non-welding seam positions of the laser welding equipment are prevented from being damaged.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A pre-welding fixture for clamping a housing and a top cover, the pre-welding fixture comprising:

2. The pre-welding fixture according to claim 1, wherein the positioning assembly comprises at least two first positioning members and at least two second positioning members, the at least two first positioning members are oppositely arranged along a second direction, the at least two second positioning members are oppositely arranged along a third direction, and the at least two first positioning members and the at least two second positioning members enclose a fixing space for fixing the housing and the top cover;

3. The pre-welding jig of claim 2, wherein the positioning assembly further comprises a first positioning driving assembly and a second positioning driving assembly, the first positioning driving assembly being configured to drive the at least two first positioning members toward or away from each other along the second direction;

4. The pre-welding jig of claim 3, wherein the positioning assembly further comprises a regulating valve, the regulating valve is connected with the first positioning driving assembly and the second positioning driving assembly, and the regulating valve is used for regulating the output quantity of the first positioning driving assembly and the second positioning driving assembly.

5. The pre-welding fixture of claim 3, further comprising a first guide and a second guide, wherein the first guide and the second guide are both mounted to the base, the welding base is engaged with the first guide, the first guide is capable of guiding the welding base to move along the second direction under the action of an external force, the welding base is engaged with the second guide, and the second guide is capable of guiding the welding base to move along the third direction under the action of an external force.

6. The pre-welding fixture of claim 5, further comprising a first restoring structure and a second restoring structure, the first restoring structure being disposed between the base and the welding base, the first restoring structure being configured to provide a restoring force to the welding base to move in the second direction to a first initial position;

7. The pre-welding fixture of claim 6, further comprising a first reference member and a second reference member, wherein the first reference member is disposed between the base and the welding base and is opposite to the first reset structure along the second direction, and the first reference member can abut against the welding base along the second direction to limit the movement of the welding base;

8. The pre-welding fixture according to any one of claims 1 to 7, wherein a positioning concave part is arranged on one side of the welding base facing the base, and the positioning concave part can be matched with a matching convex part on the top of the top cover to position the top cover; and/or

9. The pre-welding jig of any one of claims 1 to 7, wherein the hole portion comprises a plurality of sub-hole portions arranged in a ring shape to expose a plurality of weld positions in a circumferential direction of the housing and the top cover.

10. The pre-welding jig of any one of claims 1 to 7, further comprising a heat conducting member disposed on the positioning assembly, the heat conducting member being configured to contact the housing or the top cover to conduct heat of the housing or the top cover.