CN112756939B

CN112756939B - Spot welding mechanism for closing cover of cylindrical battery

Info

Publication number: CN112756939B
Application number: CN202110109570.4A
Authority: CN
Inventors: 胡东升; 苑丁丁
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2022-05-24
Anticipated expiration: 2041-01-26
Also published as: CN112756939A

Abstract

The invention discloses a cylindrical battery cover-closing spot welding mechanism which comprises a spot welding device, a cylinder cover aligning device and a cover-closing pushing device, wherein the cylinder cover aligning device is used for adjusting the relative position between a cylinder body and a cover plate so as to align the center of the cylinder body and the center of the cover plate, the cover-closing pushing device is arranged on the side surface of the cylinder body and used for pushing the cover plate into the cylinder body, the spot welding device is arranged on one side of the cylinder cover aligning device, a clearance gap is formed in the cylinder cover aligning device and faces the opening end of the cylinder body, the clearance gap is used for allowing laser emitted by the spot welding device to pass through, and the spot welding device is used for welding the connecting part of the cylinder body and the cover plate. According to the cylindrical battery cover-closing spot-welding mechanism, the cover-closing and spot-welding operations of the battery can be realized on one station by arranging the position-avoiding notch on the cylinder cover aligning device, so that a welding front cover plate is prevented from popping out of the cylinder body, and the welding quality and the automation degree are improved.

Description

Spot welding mechanism for closing cover of cylindrical battery

Technical Field

The invention relates to the field of design of battery production equipment, in particular to a spot welding mechanism for closing a cover of a cylindrical battery.

Background

The power lithium battery is taken as a core component of new energy, the technical development and the improvement of the power lithium battery are concerned, the existing cylindrical battery needs to be successively subjected to cover closing operation and spot welding operation in the production process, the cover closing operation is to align the cover plate and the end part of the cylinder body, then the cover plate is plugged into the cylinder body to seal the opening of the cylinder body, and the spot welding operation is to weld the joint of the cover plate and the cylinder body.

And close among the prior art and cover operation and spot welding operation degree of automation is not high, adopts the manual work to close the lid operation and spot welding operation at two stations respectively usually, because under the restriction of current technology, adopts clearance fit between apron and the barrel, and this can lead to the apron to fill in the barrel after the connection between them is not stable enough. Therefore, in the process of transferring the battery to the welding station after the cover is closed, the cover plate is easy to pop out from the barrel along with the vibration in the moving process, and the battery cannot be normally spot-welded after being moved to the spot welding station, so that a large amount of defects are caused, and the yield is low.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides the cylindrical battery cover-closing spot-welding mechanism which is high in automation degree and can realize cover closing and spot welding operations on the same station so as to improve the welding quality.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a cylinder battery closes and covers spot welding mechanism, includes spot welding device, cover aligning device and closes and cover and push away tight device, cover aligning device is used for adjusting the relative position between barrel and the apron to make the center of barrel align with the center of apron, close the cover and push away tight device and set up in the side of barrel, close the cover and push away tight device and be used for pushing the barrel with the apron, spot welding device set up in one side of cover aligning device, seted up on the cover aligning device and kept away a breach, keep away a breach and set up towards the open end of barrel, it is used for supplying to keep away a breach laser that spot welding device jetted out passes, spot welding device is used for carrying out welding operation to the position of being connected of barrel and apron.

In one embodiment, the barrel cover aligning device includes two oppositely disposed tightening claw assemblies, each tightening claw assembly includes a fixing plate, a tightening driving member and a plurality of claw blocks, the tightening driving member is disposed on the fixing plate, an aligning area is disposed on a side of the tightening driving member away from the fixing plate, the aligning area is used for accommodating the barrel body and the cover plate, the plurality of claw blocks are all connected with the tightening driving member, the plurality of claw blocks are disposed around the aligning area, and the tightening driving member is used for driving each claw block to approach the aligning area so as to abut against a cylindrical surface of the barrel body and a cylindrical surface of the cover plate.

In one embodiment, a groove extending towards the alignment area is formed on the surface of the clamping jaw block away from the alignment area to form the avoiding gap.

In one embodiment, the cylinder cover aligning device further includes two opposite driving assemblies, each opposite driving assembly is connected to one of the tightening claw assemblies, and the two opposite driving assemblies are used for driving the two tightening claw assemblies to move toward or away from each other.

In one embodiment, the cylindrical battery cover spot welding mechanism further comprises a guiding device, the guiding device comprises a top rail support and a ground rail support, the top rail support is arranged above the ground rail support, the fixed plate is slidably arranged on the ground rail support, two ends of the opposite driving assembly are respectively connected with the ground rail support and the fixed plate, two auxiliary plates are slidably arranged on the top rail support, and each auxiliary plate is connected with one fixed plate.

In one embodiment, the guiding device further includes a guiding and correcting rod, the guiding and correcting rod is disposed along a direction parallel to the movement direction of the tightening pawl assembly, the fixing plate is formed with a first correcting hole, the auxiliary plate is formed with a second correcting hole, the first correcting hole and the second correcting hole are disposed on the same center line, and the guiding and correcting rod is disposed through the first correcting hole and the second correcting hole.

In one embodiment, the cover closing and pushing device comprises two cover closing and pushing assemblies, the two cover closing and pushing assemblies are respectively arranged on two sides of the cylinder cover aligning device, the cover closing and pushing assembly comprises a push rod and a cover closing driving piece, the push rod is connected with the cover closing driving piece, a tightening and avoiding hole is formed in the tightening driving piece and communicated with the aligning area, a fixed avoiding hole is formed in the fixing plate and communicated with the tightening and avoiding hole, the push rod penetrates through the tightening and avoiding hole and the fixed avoiding hole, and the push rod is used for abutting against the cover plate and pushing the cover plate into the cylinder.

In one embodiment, an annular bulge is convexly arranged on one surface of the push rod close to the cover plate and used for abutting against the outer ring of the cover plate.

In one embodiment, the cylindrical battery close-cover spot welding mechanism further comprises a length testing assembly, the length testing assembly comprises a distance sensing piece and a sensing piece, the sensing piece is fixedly connected with the push rod, the distance sensing piece is fixedly arranged on the external rack and faces the sensing piece, and the distance sensing piece is used for measuring the distance between the sensing piece and the distance sensing piece.

In one embodiment, the spot welding device comprises a moving module and two welding guns, the moving module is arranged above the cylinder cover aligning device, the two welding guns are connected with the moving module and are arranged towards the cylinder body, and the moving module is used for driving the two welding guns to reciprocate between two ends of the cylinder body.

Compared with the prior art, the invention has at least the following advantages:

1. according to the spot welding mechanism for closing the cover of the cylindrical battery, the spot welding device, the cylinder cover aligning device and the cover closing and pushing device are arranged, so that the cylinder body and the cover plate of the cylindrical battery can be aligned under the driving of the cylinder cover aligning device, the cylinder cover aligning device is provided with the position avoiding notch facing the end part of the cylinder body, after the cylinder body and the cover plate are aligned, the cover closing and pushing device can push the cover plate into the cylinder body, and finally, the part, connected with the cover plate, of the end part of the cylinder body is welded through the spot welding device. So, can realize closing lid and spot welding operation on a station, prevent that the welding front shroud from popping out in the barrel, improved welding quality and degree of automation.

2. In one embodiment, the cylindrical battery cover spot welding mechanism improves the movement precision of the cylindrical battery cover spot welding mechanism by arranging the guide device, and prevents the two groups of tightening claw assemblies from being staggered in the production process, thereby improving the production efficiency and the production benefit.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a spot welding mechanism for closing a cover of a cylindrical battery according to an embodiment of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

fig. 3 is a schematic structural diagram of a cylinder cover aligning device of the spot welding mechanism for closing the cylindrical battery cover in fig. 1;

FIG. 4 is a schematic structural diagram of a cover closing and pushing device of the spot welding mechanism for closing a cover of a cylindrical battery in FIG. 1;

FIG. 5 is a schematic view of the connection of the guide of the spot welding mechanism for closing the cylindrical battery lid of FIG. 1;

fig. 6 is a schematic structural diagram of a length testing assembly of the spot welding mechanism for closing the cylindrical battery cover in fig. 1.

Description of reference numerals:

a cylindrical battery cover spot welding mechanism 10; a spot welding device 100; a moving module 110; a welding torch 120; a cylinder cover aligning device 200; a clearance gap 210; a tightening pawl assembly 220; a fixing plate 221; the first correction hole 221 a; a fixed avoiding hole 221 b; tightening the drive 222; tightening clearance holes 222 a; a jaw block 223; a registration area 224; the facing drive components 230; closing the cover and pushing the device 300 tightly; a cover closing and pushing assembly 310; a push rod 311; the annular projection 311 a; a cover closing drive 312; a guide 400; a head rail bracket 410; an auxiliary plate 411; the second correction hole 411 a; a ground rail bracket 420; a guide correction lever 430; a length test assembly 500; a distance sensor 510; a sensing piece 520; a cover closing motor 313; a cover driving member 314; a ball screw drive 315; a cover closing connecting plate 316; the capping rod set 317.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" 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," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

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 herein in the description of the invention 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.

Referring to fig. 1 and 5, a spot welding mechanism 10 for closing a cylindrical battery cover includes a spot welding device 100, a cover aligning device 200 and a cover pushing device 300, wherein the cover aligning device 200 is used for adjusting a relative position between a cylinder and a cover plate to align a center of the cylinder with a center of the cover plate, the cover pushing device 300 is disposed on a side surface of the cylinder, the cover pushing device 300 is used for pushing the cover plate into the cylinder, the spot welding device 100 is disposed on one side of the cover aligning device 200, the cover aligning device 200 is provided with a clearance gap 210, the clearance gap 210 is disposed toward an opening end of the cylinder, the clearance gap 210 is used for laser emitted by the spot welding device 100 to pass through, and the spot welding device 100 is used for welding a connecting portion between the cylinder and the cover plate.

The cylindrical battery includes a hollow cylindrical body portion in which the winding core is placed, and a lid portion which abuts against an opening portion of the cylindrical body, that is, an end portion of the cylindrical body, to seal the winding core in the cylindrical body.

The purpose of the cover alignment device 200 is to align the centers of the cylinder and the cover plate, i.e. align the outer cylindrical surface of the cover plate with the inner wall of the cylinder, and the cover plate can be smoothly pushed into the cylinder by the cover closing and pushing device 300 only after the alignment. The operation process of the spot welding mechanism 10 for closing the cover of the cylindrical battery is as follows, firstly, the cylinder body and the cover plate are put into the cylinder cover aligning device 200 through manpower or a mechanical arm, the cylinder cover aligning device 200 can be any device capable of adjusting the relative position between the cylinder body and the cover plate, after the cylinder body and the cover plate are adjusted in place by the cylinder cover aligning device 200, the cover closing and pushing device 300 pushes the cover plate towards the direction close to the cylinder body until the cover plate is pushed into the cylinder body, and at the moment, the opening end of the cylinder body is positioned below a position avoiding notch 210 arranged on the cylinder cover aligning device 200, so that the spot welding device 100 is opened and welding operation is carried out on the connecting part of the cylinder body and the cover plate after the cover closing operation is completed. The spot welding apparatus 100 may be a general laser welding machine such as a carbon dioxide laser welding machine or the like.

Referring to fig. 1 and fig. 3, in one embodiment, the barrel cover aligning device 200 includes two oppositely disposed tightening claw assemblies 220, each tightening claw assembly 220 includes a fixing plate 221, a tightening driving member 222 and a plurality of claw blocks 223, the tightening driving member 222 is disposed on the fixing plate 221, an aligning area 224 is disposed on a side of the tightening driving member 222 away from the fixing plate 221, the aligning area 224 is used for accommodating the barrel body and the cover plate, the plurality of claw blocks 223 are all connected to the tightening driving member 222, the plurality of claw blocks 223 are disposed around the aligning area 224, and the tightening driving member 222 is used for driving each claw block 223 to approach the aligning area 224 to abut against a cylindrical surface of the barrel body and a cylindrical surface of the cover plate.

It should be noted that, the tightening driving element 222 can select a three-jaw cylinder, a four-jaw cylinder, etc. according to the number of the jaw blocks 223, and the use process of the cylinder cover aligning device 200 is as follows, in the initial state, two tightening jaw assemblies 220 are both in an open state, a cover plate is respectively placed into the aligning areas 224 in the two tightening jaw assemblies 220 by a manual or a mechanical hand, and then both ends of the cylinder body are respectively placed in the aligning areas 224 of the two tightening jaw assemblies 220, at this time, the cover plates are placed at both ends of the cylinder body. Subsequently, the tightening driving member 222 drives each jaw block 223 to approach the alignment area 224, during the movement of the jaw blocks 223, the cylindrical surfaces of the barrel and the cover plate contact the jaw blocks 223 and are positioned to the center of the alignment area 224 by the jaw blocks 223, finally, the cover plate and the barrel are aligned, and then the cover closing and pushing device 300 pushes the two cover plates into the barrel.

Referring to fig. 2, in one embodiment, the surface of the clamping jaw block 223 away from the alignment area 224 is provided with a groove extending toward the alignment area 224 to form the avoiding gap 210.

It should be noted that the clearance gap 210 may be formed by forming a groove or a hole in the jaw block 223, or may directly use the gap between the jaw blocks 223 in the same tightening jaw assembly 220 as the clearance gap 210.

Referring to fig. 1, in one embodiment, the cover alignment apparatus 200 further includes two opposite driving assemblies 230, each opposite driving assembly 230 is connected to one of the two tightening pawl assemblies 220, and the two opposite driving assemblies 230 are used for driving the two tightening pawl assemblies 220 to move toward or away from each other.

It should be noted that, in order to facilitate the loading and unloading of the cylinder and the cover plate, in this embodiment, two opposite driving assemblies 230 are further provided, the opposite driving assemblies 230 may be a common telescopic cylinder or a common telescopic cylinder, before the loading, the two opposite driving assemblies 230 drive the two tightening claw assemblies 220 to be away from each other, the tightening claw assemblies 220 drive the plurality of claw clamping blocks 223 to be opened mutually, when the cylinder is placed between the two tightening claw assemblies 220 and the cover plate is placed in the tightening claw assemblies 220, the two opposite driving assemblies 230 drive the two tightening claw assemblies 220 to be close to each other until the two ends of the cylinder are respectively accommodated in the alignment areas 224 of the two tightening claw assemblies 220, then the two tightening claw assemblies 220 are folded and clamp the cylinder therein, and finally the cover plate is pushed by the cover closing and pushing device 300 to enter the cylinder.

Referring to fig. 1, 5 and 6, in one embodiment, the spot welding mechanism 10 further includes a guiding device 400, the guiding device 400 includes a top rail bracket 410 and a bottom rail bracket 420, the top rail bracket 410 is disposed above the bottom rail bracket 420, the fixing plate 221 is slidably disposed on the bottom rail bracket 420, two ends of the driving component 230 are respectively connected to the bottom rail bracket 420 and the fixing plate 221, two auxiliary plates 411 are slidably disposed on the top rail bracket 410, and each auxiliary plate 411 is connected to one fixing plate 221.

It should be noted that, in order to ensure the relative movement position precision between the two tightening claw assemblies 220 and prevent the misalignment, the guide device 400 is further provided in the present embodiment, the common rail structures may be provided on the top rail bracket 410 and the ground rail bracket 420, the common rail groove structures may be provided on the fixed plate 221 and the auxiliary plate 411, by the pushing of the two opposite driving assemblies 230, the two fixing plates 221 can move toward or away from each other on the ground rail bracket 420, and the two auxiliary plates 411 are respectively connected with the two fixing plates 221, the two auxiliary plates 411 are moved toward or away from each other by the two fixing plates 221, in the conventional prior art designs, only the lower set of rails is typically designed, but in the present invention, the weight of the two tightening pawl assemblies 220 is relatively large, therefore, in order to prevent the track from being skewed after long-time movement, an upper group of tracks and a lower group of tracks are designed to ensure the movement precision after long-time work.

Referring to fig. 5, in one embodiment, the guiding device 400 further includes a guiding correction rod 430, the guiding correction rod 430 is disposed along a direction parallel to the moving direction of the tightening pawl assembly 220, the fixing plate 221 is formed with a first correction hole 221a, the auxiliary plate 411 is formed with a second correction hole 411a, the first correction hole 221a and the second correction hole 411a are disposed on the same center line, and the guiding correction rod 430 is disposed through the first correction hole 221a and the second correction hole 411 a.

It should be noted that, because the top rail bracket 410 and the ground rail bracket 420 are provided at the same time, there is a high requirement for the relative installation accuracy of the top rail bracket 410 and the ground rail bracket 420, and once the deviation between the two brackets is too large, the two tightening claw assemblies 220 cannot move smoothly under the driving of the facing driving assembly 230. Therefore, in order to facilitate the installation and correction of the relative position between the top rail support 410 and the ground rail support 420, in this embodiment, a guiding and correcting rod 430 is further disposed and arranged along a direction parallel to the movement direction of the tightening pawl assembly 220, a first correcting hole 221a is disposed on the fixing plate 221, a second correcting hole 411a is disposed on the auxiliary plate 411, the first correcting hole 221a and the second correcting hole 411a are disposed on the same center line, and the guiding and correcting rod 430 is disposed through the first correcting hole 221a and the second correcting hole 411 a. Thus, when the top rail bracket 410 and the ground rail bracket 420 are installed, one end of the guiding and correcting rod 430 is inserted into the first correcting hole 221a and the second correcting hole 411a on one side of the cylinder, the other end of the guiding and correcting rod 430 is inserted into the first correcting hole 221a and the second correcting hole 411a on the other side of the cylinder, and then the correcting operation is completed, and finally the top rail bracket 410 and the ground rail bracket 420 are respectively installed and fixed.

Referring to fig. 3 and 4, in one embodiment, the cover closing and pushing device 300 includes two cover closing and pushing assemblies 310, the two cover closing and pushing assemblies 310 are respectively disposed at two sides of the cover aligning device 200, the cover closing and pushing assembly 310 includes a push rod 311 and a cover closing driving member 312, the push rod 311 is connected to the cover closing driving member 312, the cover closing driving member 222 is provided with a tightening and avoiding hole 222a, the tightening and avoiding hole 222a is communicated with the aligning region 224, the fixing plate 221 is provided with a fixing and avoiding hole 221b, the fixing and avoiding hole 221b is communicated with the tightening and avoiding hole 222a, the push rod 311 is disposed in the tightening and avoiding hole 222a and the fixing and avoiding hole 221b, and the push rod 311 is used for abutting against the cover plate and pushing the cover plate into the cylinder.

It should be noted that the cover closing driving member 312 may be a common telescopic cylinder or a telescopic oil cylinder, the push rod 311 is inserted into the tightening avoiding hole 222a and the fixing avoiding hole 221b, before the barrel and the cover plate are loaded, the cover closing driving member 312 is in a contracted state, after the barrel and the cover plate are loaded, the cover plate is aligned with the barrel by the cover aligning device 200, then the cover closing driving member 312 extends and pushes the cover plate into the barrel to complete the cover closing operation, and finally the spot welding device 100 performs the spot welding operation on the connecting portion between the barrel and the cover plate, so that the cover aligning device 200 is still in a tightened state to limit the positions of the barrel and the cover plate after the cover closing operation is completed, thereby preventing the cover plate from bouncing off and improving the welding quality.

Referring to fig. 5, in one embodiment, an annular protrusion 311a is protruded from a surface of the push rod 311 close to the cover plate, and the annular protrusion 311a is configured to abut against an outer ring of the cover plate.

It should be noted that the outer ring of the cover plate is a circle of the cover plate close to the outer side on the side surface close to the push rod 311, the push rod 311 pushing the cover plate in the conventional technology is usually contacted with a whole side surface of the cover plate close to the push rod 311, the cover plate is easily inclined when being pushed into the barrel body due to the design mode, because the contact surface between the push rod 311 and the cover plate is large, when the surface of the cover plate contacted with the push rod 311 is flat, the push rod 311 can push the cover plate to incline in the process of pushing the cover plate, in order to solve the problem, in the embodiment, an annular protrusion 311a is protrudingly arranged on the side of the push rod 311 close to the cover plate, so that only the outer ring of the cover plate is contacted with the push rod 311, and the uneven part in the middle of the cover plate is not contacted with the push rod 311, and thus, the cover plate can be prevented from being inclined in the process of being pushed.

Referring to fig. 6, in one embodiment, the spot welding mechanism 10 for closing a cylindrical battery cover further includes a length testing assembly 500, the length testing assembly 500 includes a distance sensing element 510 and a sensing piece 520, the sensing piece 520 is fixedly connected to the push rod 311, the distance sensing element 510 is fixedly disposed on the external frame, the distance sensing element 510 faces the sensing piece 520, and the distance sensing element 510 is used for measuring a distance between the sensing piece 520 and the distance sensing element 510.

It should be noted that, the distance sensing member 510 may be a common photoelectric sensor or a microwave distance measuring device, the distance sensing member 510 is fixedly disposed on the external rack, the sensing piece 520 is fixedly connected to the push rod 311, so the sensing piece 520 moves along with the movement of the push rod 311, and the distance sensing member 510 is fixed in position, so the distance sensing member 510 can continuously test the motion state of the sensing piece 520 and the distance between the sensing piece 520 and the distance sensing member 510, so the distance can be measured in time after the push rod 311 moves, so as to determine the motion state of the push rod 311, and thus, the intelligent degree of the cylinder battery cover spot welding mechanism 10 can be improved.

Referring to fig. 1, in one embodiment, the spot welding apparatus 100 includes a moving module 110 and two welding guns 120, the moving module 110 is disposed above the cap alignment apparatus 200, the two welding guns 120 are connected to the moving module 110, the two welding guns 120 are disposed toward the barrel, and the moving module 110 is configured to drive the two welding guns 120 to reciprocate between two ends of the barrel.

It should be noted that, in the present embodiment, two welding guns 120 are provided, so that two positions can be spot-welded at the same time, and the moving module 110 is provided, so that the two welding guns 120 can move to the other end of the cylinder for welding after welding one end of the cylinder, thereby saving the number of the welding guns 120, reducing the cost, and improving the welding efficiency.

The cover closing driving part 312 comprises a cover closing motor 313, a cover closing transmission part 314, a ball screw transmission part 315, a cover closing connecting plate 316 and a cover closing rod set 317, the cover closing motor 313 is arranged on the side surface of the push rod 311, the ball screw transmission part 315 is positioned below the cover closing motor 313, two ends of the cover closing transmission part 314 are respectively connected with the cover closing motor 313 and the ball screw transmission part 315, the cover closing connecting plate 316 is arranged on one surface, far away from the cover closing transmission part 314, of the ball screw transmission part 315, the cover closing connecting plate 316 is connected with the ball screw transmission part 315, and two ends of the cover closing rod set 317 are respectively connected with the cover closing connecting plate 316 and the push rod 311.

Referring to fig. 4, the cover closing motor 313 and the ball screw transmission element 315 disposed up and down can save a lateral space, the movement of the cover closing motor 313 can be transmitted to the screw of the ball screw transmission element 315 through the transmission of the cover closing transmission element 314, and the ball nut in the ball screw transmission element 315 moves in a direction away from the cover closing transmission element 314 under the driving of the screw along with the rotation of the cover closing motor 313, so the cover closing connection plate 316 connected with the ball nut also moves in a direction away from the cover closing transmission element 314, and two ends of the cover closing rod set 317 are respectively connected with the cover closing connection plate 316 and the push rod 311, so the push rod 311 exits the alignment area 224 under the driving of the cover closing rod set 317, that is, the push rod 311 moves in a direction away from the cylinder. The rotation direction of the cover closing motor 313 is changed to drive the push rod 311 to move towards the direction close to the cylinder.

Because the stroke of the push rod 311 and the length of the ball screw transmission 315 are relatively long, the transverse space occupied by the cover closing driving part 312 is reduced by designing the connecting structure, and the occupied space is saved.

1. according to the spot welding mechanism 10 for closing the cover of the cylindrical battery, the spot welding device 100, the cylinder cover aligning device 200 and the cover closing and pushing device 300 are arranged, so that the cylinder body and the cover plate of the cylindrical battery can be aligned under the driving of the cylinder cover aligning device 200, the cover aligning device 200 is further provided with the avoiding gap 210 facing the end part of the cylinder body, after the cylinder body and the cover plate are aligned, the cover closing and pushing device 300 can push the cover plate into the cylinder body, and finally, the part, connected with the cover plate, of the end part of the cylinder body is welded through the spot welding device 100. So, can realize closing lid and spot welding operation on a station, prevent that the welding front shroud from popping out in the barrel, improved welding quality and degree of automation.

2. In one embodiment, the cylindrical battery cover spot welding mechanism 10 of the present invention improves the movement precision of the cylindrical battery cover spot welding mechanism 10 by providing the guiding device 400, and prevents the two sets of tightening claw assemblies 220 from being dislocated during the production process, thereby improving the production efficiency and the production benefit.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims

1. The utility model provides a cylinder battery closes and covers spot welding mechanism which characterized in that includes: the spot welding device comprises two oppositely arranged tightening claw assemblies, each tightening claw assembly comprises a fixing plate, a tightening driving piece and a plurality of clamping claw blocks, and the cylindrical battery cover-closing spot welding mechanism further comprises a guiding device, the guide device comprises a top rail support and a ground rail support, the top rail support is arranged above the ground rail support, the fixing plate is arranged on the ground rail support in a sliding manner, the cylinder cover aligning device further comprises two opposite driving components, each opposite driving component is connected with one tightening claw component, the two opposite driving components are used for driving the two tightening claw components to move close to or away from each other, two ends of each opposite driving component are respectively connected with the ground rail support and the fixing plate, two auxiliary plates are arranged on the top rail support in a sliding manner, each auxiliary plate is connected with one fixing plate, the guide device further comprises a guide correcting rod, the guide correcting rod is arranged along a direction parallel to the movement direction of the tightening claw components, a first correcting hole is formed in each fixing plate, and a second correcting hole is formed in each auxiliary plate, the first correction hole and the second correction hole are arranged at the same center line, the guide correction rod is arranged in the first correction hole and the second correction hole in a penetrating manner, the tightening driving piece is arranged on the fixed plate, one side of the tightening driving piece, which is far away from the fixed plate, is provided with an alignment area, the alignment area is used for accommodating a cylinder body and a cover plate, a plurality of clamping jaw blocks are connected with the tightening driving piece and are arranged around the alignment area, the tightening driving piece is used for driving each clamping jaw block to approach the alignment area so as to abut against the cylindrical surface of the cylinder body and the cylindrical surface of the cover plate, the cover closing and pushing device comprises two cover closing and pushing assemblies, the two cover closing and pushing assemblies are respectively arranged at two sides of the cover aligning device, the cover closing and pushing assemblies comprise push rods and cover closing driving pieces, and the push rods are connected with the cover closing driving pieces, the tightening driving piece is provided with a tightening avoiding hole, the tightening avoiding hole is communicated with the alignment area, the fixed avoiding hole is formed in the fixed plate and is communicated with the tightening avoiding hole, the push rod penetrates through the tightening avoiding hole and the fixed avoiding hole, the push rod is used for abutting against the cover plate and pushing the cover plate into the barrel body, one surface, close to the cover plate, of the push rod is provided with an annular bulge in a protruding mode, and the annular bulge is used for abutting against the outer ring of the cover plate.

2. The spot welding mechanism for closing the cover of the cylindrical battery as claimed in claim 1, wherein the surface of the clamping jaw block away from the alignment area is provided with a groove extending towards the alignment area to form the avoiding gap.

3. The cylindrical battery close-cover spot welding mechanism according to claim 1, further comprising a length testing component, wherein the length testing component comprises a distance sensing piece and a sensing piece, the sensing piece is fixedly connected with the push rod, the distance sensing piece is fixedly arranged on an external rack, the distance sensing piece faces the sensing piece, and the distance sensing piece is used for measuring the distance between the sensing piece and the distance sensing piece.

4. The spot welding mechanism for the close cover of the cylindrical battery as claimed in claim 1, wherein the spot welding device comprises a moving module and two welding guns, the moving module is arranged above the alignment device for the cover, the two welding guns are connected with the moving module and are arranged towards the cylinder body, and the moving module is used for driving the two welding guns to reciprocate between two ends of the cylinder body.