CN211125890U - Needle pulling assembly and welding needle recovery device - Google Patents

Abstract

The application relates to a needle pulling assembly and a welding needle recovery device, which are used for grabbing and pulling a welding needle at a needle pulling station so as to pull the welding needle out of a battery steel shell. Wherein, the needle pulling assembly comprises a first mounting plate; the grabbing piece is arranged on the first mounting plate in a sliding mode and used for grabbing the welding pins at the pin pulling station; and the first driving piece is arranged on the first mounting plate, is connected with the grabbing piece and is used for driving the grabbing piece to move away from the battery steel shell after the grabbing piece grabs the welding pin so as to pull out the welding pin from the battery steel shell. The needle pulling assembly can improve the needle pulling efficiency in the battery welding process.

Description

Needle pulling assembly and welding needle recovery device

Technical Field

The application relates to the field of lithium battery processing, in particular to a needle pulling assembly and a welding needle recovery device.

Background

In the general cylindrical lithium ion battery structure, the negative electrode end is a battery steel shell, and the positive electrode end is a battery cover plate. The negative pole of the battery cell inside the battery is switched on inside and outside by welding between the negative pole lug and the battery steel shell, and the welding of the negative pole lug and the battery steel shell is realized by resistance welding. The welding of the negative electrode tab is divided into the welding of the tab on the pole piece and the welding between the tab and the steel shell of the battery, which is generally called as bottom welding.

The conventional negative tab welding process can be briefly described as follows: and (3) putting the battery core into a shell, inserting a welding pin, welding and pulling out the welding pin. However, the pulling and inserting of the welding pins all need manual work, and the processing efficiency is low.

In addition, the welding pin is welding the back to the battery steel casing, and the welding pin can inevitably take place the adhesion with the battery steel casing, and the manual work is pulled out the needle and can be time-consuming hard. And the welding needle may be damaged due to excessive force application in the needle pulling process, which results in higher processing cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pull out needle subassembly and welding needle recovery unit can improve the efficiency of pulling out the needle in the battery welding process.

In order to solve the technical problem, the application adopts a technical scheme that:

a needle pulling assembly for grabbing and pulling a welding needle at a needle pulling station to pull the welding needle out of a battery steel shell comprises: a first mounting plate; the grabbing piece is arranged on the first mounting plate in a sliding mode and used for grabbing the welding pins at the pin pulling station; and the first driving piece is arranged on the first mounting plate, is connected with the grabbing piece and is used for driving the grabbing piece to move away from the battery steel shell after the grabbing piece grabs the welding pins so as to pull the welding pins out of the battery steel shell.

In an embodiment of this application, be equipped with first slide rail and the first slider of mutually supporting on the first mounting panel, grab and locate on the first slider, the output of first driving piece with first slider is connected, with the drive grab and follow first slide rail is close to or keeps away from the battery steel casing motion.

In an embodiment of the present application, the method further includes: the second mounting plate is arranged on the first sliding block; the guide shaft penetrates through the second mounting plate, and one end of the guide shaft is connected with the grabbing piece; the limiting plate is arranged at the other end of the guide shaft; the elastic piece is sleeved on the guide shaft and is positioned between the limiting plate and the second mounting plate; after the grabbing piece grabs the welding pins, the first driving piece drives the first sliding block to be away from the battery steel shell to move, the elastic piece is compressed and pushes against the limiting plate, so that the guide shaft and the grabbing piece connected with the guide shaft are kept away from the acting force of the battery steel shell, and the grabbing piece can pull the welding pins out of the battery steel shell.

In an embodiment of this application, still include the detection piece, the detection piece is located the limiting plate and/or on the second mounting panel, be used for detecting the limiting plate with distance between the second mounting panel, with pass through the deformation judgement of elastic component the grabbing piece is exerted and is in whether effort on the welding needle surpasss the default.

In one embodiment of the present application, the detecting member includes a link and a first sensor; the connecting rod is arranged on the limiting plate and can move relative to the second mounting plate along with the limiting plate, and the first sensor is arranged on the second mounting plate and is opposite to the connecting rod; or the connecting rod is arranged on the second mounting plate and can move relative to the limiting plate along with the second mounting plate, and the first sensor is arranged on the limiting plate and is opposite to the connecting rod; after the distance between the limiting plate and the second mounting plate is smaller than the preset distance, the connecting rod can shield the signal transmission path of the first sensor.

In an embodiment of the application, the gripping member includes a second driving member and a clamping jaw, and the second driving member is connected with the clamping jaw and is used for driving the clamping jaw to perform gripping and releasing actions; and a second sensor is arranged on the clamping jaw and used for detecting whether the welding needle is positioned on the clamping jaw.

In an embodiment of the present application, the welding pin has a welding pin body and a welding pin top, and the welding pin top is disposed at one end of the welding pin body; wherein, the clamping jaw is equipped with: the flange part is used for abutting against the welding needle to be close to the end face of the welding needle main body when the clamping jaw grabs the welding needle; and the abutting part is arranged in an arc shape and is attached to the side surface of the welding needle main body when the clamping jaw grabs the welding needle.

In order to solve the above technical problem, another technical solution adopted by the present application is:

a welding pin recovery device comprising: the needle pulling assembly is used for pulling the welding needle at a needle pulling station; the carrying assembly is connected with the needle pulling assembly and is used for driving the needle pulling assembly to move back and forth between the needle pulling station and the transferring station; the conveying assembly is arranged at the transferring station and used for receiving the welding pins pulled out by the pin pulling assembly and conveying the welding pins to the collecting station so that the welding pins can be reused; wherein the needle extracting assembly is the needle extracting assembly as described above.

In an embodiment of the application, the carrying assembly includes a support plate, and a second slide rail and a second slide block that are matched with each other, the second slide rail is disposed on the support plate, and the needle pulling assembly is connected with the second slide block, so that the needle pulling assembly can carry the pulled welding needle from the needle pulling station to the transfer station under the driving of the carrying assembly.

In an embodiment of the application, the transfer assembly comprises a transfer track for transporting the welding pins; wherein, orbital first end of transmission is located transport the station, orbital second end of transmission is located the station of gathering materials, just orbital first end of transmission is higher than orbital second end setting of transmission, so that the welding needle can be under the effect of self gravity, follow transport the station and follow the transmission track shifts to the station of gathering materials.

The beneficial effect of this application is: be different from prior art, this application provides a pull out needle subassembly and welding pin recovery unit, should pull out the needle subassembly and grab piece and first driving piece through setting up, snatch a snatch after the welding pin, first driving piece can drive and snatch a motion, and then will weld the pin and extract from the battery steel casing to battery welded efficiency has been improved. Further, this application is still through setting up elastic component and detection piece to can reduce the risk that the welding needle breaks off at the needle-pulling in-process.

Drawings

FIG. 1 is a schematic view of the construction of the needle assembly of the present application;

FIG. 2 is a partial schematic view of the needle puller assembly of FIG. 1 in another orientation;

FIG. 3 is a schematic structural diagram of a welding pin according to a specific application scenario of the present application;

FIG. 4 is a schematic view of the structure of the jaws of the gripper of FIG. 1;

FIG. 5 is a schematic view of the needle puller assembly and carrier assembly of the needle recovery device of the present application;

FIG. 6 is a schematic view of the structure of the transfer module of the needle recovery device of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

It is noted that directional terms, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," and the like, referred to herein are solely for the purpose of reference to the orientation of the appended drawings and, thus, are used for better and clearer illustration and understanding of the present application, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered limiting of the present application.

Referring to fig. 1, fig. 1 is a schematic structural view of a needle extracting assembly according to the present application. In the present application, the needle pulling assembly 100 is used to sequentially pull out the welding needles from the battery steel shell (not shown) at the needle pulling station after the welding of the welding needles on the negative electrode tabs of the battery core and the battery steel shell is completed. After the bottom welding of the battery steel shell is completed, the end of the welding pin can be exposed out of the opening of the battery steel shell, so that the pin pulling assembly 100 can be pulled to grab and pull.

In an embodiment of the present application, the needle pulling assembly 100 may include a first mounting plate 110, a gripping member 120, and a first driving member 130. The grabbing piece 120 is slidably arranged on the first mounting plate 110 and used for grabbing the welding pins at the pin pulling station; the first driving member 130 is disposed on the first mounting plate 110 and connected to the grabbing member 120, for driving the grabbing member 120 to move away from the battery steel case after the grabbing member 120 grabs the welding pins, so as to pull out the welding pins from the battery steel case.

After the bottom welding is completed, the battery steel shells can sequentially pass through the pin pulling station. Taking the orientation of fig. 1 as an example, the first mounting plate 110 may be vertically disposed at the needle extracting station. When a battery steel shell reaches the needle pulling station, the first driving member 130 drives the grabbing member 120 to be close to the battery steel shell, so that the grabbing member 120 can contact and grab the welding needle; after the grabbing piece 120 grabs the one end of the welding pin, the first driving piece 130 further drives the grabbing piece 120 to move away from the battery steel shell, so that the grabbing piece 120 can apply vertical upward acting force to the welding pin, the welding pin is separated from the battery steel shell, and the pin pulling process is completed.

The application provides a needle pulling assembly 100, through setting up grabbing piece 120 and first driving piece 130, after grabbing piece 120 and snatching the welding needle, first driving piece 130 can drive grabbing piece 120 and move, and then extracts the welding needle from the battery steel casing. Therefore, the technical defect that the needle is pulled out manually in the prior art can be overcome, and the efficiency of pulling out the needle in the battery welding process is improved.

Further, referring to fig. 1, in order to realize that the grabbing element 120 can be slidably disposed on the first mounting plate 110, in an embodiment, the first mounting plate 110 is provided with a first sliding rail 111 and a first sliding block 112, which are engaged with each other. The extending direction of the first slide rail 111 is the same as the plugging direction of the welding pins. The grabbing piece 120 is arranged on the first sliding block 112, and the output end of the first driving piece 130 is connected with the first sliding block 112, so that the grabbing piece 120 can be driven to move close to or far away from the battery steel shell under the action of the first driving piece 130.

Specifically, the first driving element 130 may be a telescopic cylinder, a power output shaft of the telescopic cylinder is connected to the first sliding block 112, and when the telescopic cylinder performs a piston motion, the first sliding block 112 may be driven to move along the first sliding rail 111. Of course, in other embodiments, the first driving member 130 may also be a driving motor, and a power output shaft of the driving motor may be connected to the first sliding block 112 in a screw transmission manner, so as to drive the first sliding block 112 to move along the first sliding rail 111 when the driving motor rotates forward or backward. It is understood that a person skilled in the art can select an implementation manner of the first driving element 130 according to practical situations, and details thereof are not repeated herein.

Further, considering the situation that if the first driving member 130 directly applies a force to the grasping member 120 through the output end, the welding pins may be broken due to sudden increase of the stress on the welding pins, so that part of the welding pins may remain inside the steel case of the battery, thereby affecting the yield of the final battery.

Based on this, please refer to fig. 2 in conjunction with fig. 1, fig. 2 is a schematic view of a portion of the needle extracting assembly 100 of fig. 1 in another direction. In an embodiment of the present application, the needle extracting assembly 100 may further include a second mounting plate 140, a guide shaft 160, a limit plate 150, and an elastic member 180. The second mounting plate 140 is disposed on the first slider 112, the guide shaft 160 is disposed through the second mounting plate 140, and one end of the guide shaft is connected to the grasping member 120; the stopper plate 150 is disposed at the other end of the guide shaft 160, and the elastic member 180 is disposed between the stopper plate 150 and the second mounting plate 140.

After the grasping member 120 grasps the welding pin, the first driving member 130 drives the first slider 112 to move away from the battery steel case. At this time, since the grabbing piece 120 is in the same motion state as the welding pin after grabbing the welding pin, initially, the grabbing piece 120 and the welding pin are stationary together due to the adhesion between the welding pin and the bottom of the battery steel shell. Therefore, when the first driving element 130 drives the first slider 112 to move, the second mounting plate 140 disposed on the first slider 112 can move relative to the limiting plate 150, so that the elastic element 180 disposed between the second mounting plate 140 and the limiting plate 150 is pressed to deform. As the deformation of the elastic member 180 is gradually increased, the elastic member 180 pushes the stopper plate 150, so that the acting force applied to the guide shaft 160 connected to the stopper plate 150 and the grasping member 120 is gradually increased. When the acting force of the elastic piece 180 applied on the welding pin is larger than the adhesion acting force of the welding pin and the bottom of the battery steel shell, the welding pin is separated from the bottom of the battery steel shell, so that the pin pulling operation is realized.

Specifically, the elastic member 180 in this embodiment may be a disc spring. Of course, in other embodiments, the elastic member 180 may also be a rubber spring, and a person skilled in the art may select the type of the elastic member 180 according to actual situations, which is not described herein.

It can be seen that, compare in the mode of direct application of force, can be through changing the self deformation of elastic component 180 in this application to there is a gradual change process to the effort that the welding pin was exerted, consequently can reduce the welding pin and receive the force suddenly and cause cracked risk.

Further, in order to reduce the wear between the guide shaft 160 and the second mounting plate 140, a linear bearing 161 is further disposed between the guide shaft 160 and the second mounting plate 140 for improving the service life of the guide shaft 160 and the second mounting plate 140. Wherein, in order to improve the stability of grabbing piece 120 at the needle in-process motion of pulling out, guiding axle 160 can set up to two sets of, can avoid grabbing piece 120 and appear rocking after grabbing the welding needle. It is understood that the number of the guide shafts 160 can be adjusted by those skilled in the art according to the actual situation, and the detailed description thereof is omitted here.

In some cases, the adhesion condition between the welding pin and the bottom of the battery steel shell is serious, and the pin cannot be pulled out normally. At this time, if the force applied to the welding pins by the first driving member 130 is too large, the welding pins may be broken.

Based on this, referring to fig. 1, in an embodiment of the present application, the needle pulling assembly 100 may further include a detecting element 170, and the detecting element 170 detects a distance between the limiting plate 150 and the second mounting plate 140, so as to determine a deformation amount of the elastic element 180. Therefore, whether the force exerted on the welding pins by the first driving member 130 through the elastic member 180 exceeds the preset value can be known.

Specifically, the detection member 170 may include a link 171 and a first sensor 172. The connecting rod 171 is disposed on the limiting plate 150 and can move relative to the second mounting plate 140 following the limiting plate 150, and the first sensor 172 is disposed on the second mounting plate 140 and opposite to the connecting rod 171. Alternatively, the link 171 is disposed on the second mounting plate 140 and can follow the second mounting plate 140 to move relative to the stopper plate 150, and the first sensor 172 is disposed on the stopper plate 150 and is disposed opposite to the link 171. Wherein, the first sensor 172 is a photoelectric sensor, and after the distance between the limiting plate 150 and the second mounting plate 140 is less than the preset distance, the connecting rod 171 can block the signal transmission path of the first sensor 172.

Therefore, the preset distance can be adjusted by adjusting the length of the connecting rod 171, so that the force applied to the welding wire by the first driving member 130 can be judged by the deformation amount of the elastic member 180.

Of course, in other embodiments, the detection member 170 may be a distance sensor or a pressure sensor. When the detecting member 170 is a distance sensor, it may be disposed on the opposite side of the limiting plate 150 or the mounting plate; when the sensing member 170 is a pressure sensor, it is required to be disposed between the elastic member 180 and the stopper plate 150 or between the elastic member 180 and the second connection plate. It is understood that a person skilled in the art can adjust the type of the detecting member 170 according to actual situations, and the detailed description is omitted here.

Therefore, the deformation amount of the elastic member 180 can be determined by detecting the distance between the limiting plate 150 and the second mounting plate 140 by providing the detecting member 170, so as to deduce the magnitude of the force applied to the welding wire by the first driving member 130. When the distance between the limiting plate 150 and the second mounting plate 140 is smaller than the preset distance, it can be determined that the acting force applied by the first driving member 130 to the welding needle exceeds the preset value. The detection member 170 may send out the determination result and remind the operator to perform manual intervention, so as to avoid the situation that the welding pin is broken due to an excessive acting force applied to the welding pin by the first driving member 130.

Further, with continued reference to fig. 1 and 2, in one embodiment of the present application, the gripping member 120 may include a second driving member 121 and a gripping jaw 122. The second driving member 121 is connected to the clamping jaw 122 for driving the clamping jaw 122 to perform the grabbing and releasing actions.

In particular, the gripping member 120 may be an air gripper, and the second driving member 121 may have two air chambers, one of which may be inflated to drive the gripping jaws 122 to perform corresponding actions. In this embodiment, two clamping jaws 122 may be provided. Of course, in other embodiments, one skilled in the art can select a suitable gripping member 120, which is not described herein.

It is considered that the gripping member 120 may slip when gripping and pulling the welding pin 10, thereby affecting the pin pulling efficiency. Based on this, please refer to fig. 3 and fig. 4, fig. 3 is a schematic structural diagram of the welding pin 10 in a specific usage scenario of the present application, and fig. 4 is a schematic structural diagram of the grasping element 120 in fig. 1.

In order to improve the grabbing effect of the grabbing member 120, the welding pin 10 in the present application may include a welding pin body 11 and a welding pin top 12, the welding pin top 12 is disposed at one end of the welding pin body 11, and the diameter of the welding pin top 12 is greater than the diameter of the welding pin body 11; the other end of the welding pin main body 11 is a welding end 13 which is used for penetrating into the bottom of the battery steel shell and welding the negative electrode lug with the bottom of the battery steel shell. The clamping jaw 122 is provided with a flange 1221 and a holding portion 1222. The flange 1221 is used for abutting against the end face of the welding needle top 12 close to the welding needle body 11 when the clamping jaw 122 grabs the welding needle 10, and the abutting portion 1222 is arranged in an arc shape and matched with the outline of the outer side face of the welding needle body 11, and is used for being attached to the side face of the welding needle body 11 when the clamping jaw 122 grabs the welding needle body 11.

Further, the clamping jaw 122 may further be provided with a second sensor 1223, and the second sensor 1223 is used to detect whether the welding pin 10 is located on the clamping jaw 122, so that the working state of the gripping member 120 may be obtained in real time.

Therefore, when the grabbing piece 120 grabs the welding pin 10, the flange portion 1221 of the clamping jaw 122 in the grabbing piece 120 can abut against the welding pin top 12, so that acting force can be applied to the welding pin top 12, and the welding pin 10 is prevented from being excessively clamped to scratch or damage the welding pin 10; the abutting portion 1222 can stabilize the stress direction of the welding pin body 11, so as to prevent the welding pin 10 from deforming during pulling.

Further, in this application, the welding pin still need be through processes such as transport and recovery after the completion pulls out the needle process to realize the reuse of welding pin. Based on this, please refer to fig. 5 and fig. 6, fig. 5 is a schematic structural diagram of a needle pulling assembly 210 and a carrying assembly 220 in a welding needle recovery device 200 of the present application, and fig. 6 is a schematic structural diagram of a transmission assembly 230 in the welding needle recovery device 200 of the present application. Among other things, the needle recovery device 200 may include a needle extracting assembly 210, a handling assembly 220, and a transfer assembly 230. The needle pulling assembly 210 is used for pulling welding needles at a needle pulling station, the carrying assembly 220 is connected with the needle pulling assembly 210 and used for driving the needle pulling assembly 210 to move back and forth between the needle pulling station and a transfer station, and the transmission assembly 230 is arranged at the rotation station and used for receiving the welding needles pulled out by the needle pulling assembly 210 and transmitting the welding needles to a material collecting station so that the welding needles can be reused. Please refer to any of the above embodiments for the specific structure of the needle pulling assembly 210 in this embodiment, which is not described herein.

To enable the needle extracting assembly 210 to reciprocate between the needle extracting station and the transferring work, in an embodiment, the handling assembly 220 may include a support plate 223 and a second slide rail 221 and a second slide 222 cooperating with each other. The second slide rail 221 is disposed on the support plate 223, and the needle pulling assembly 210 is connected to the second slider 222. Further, in order to improve the stability during transportation, two sets of second slide rails 221 may be provided. It will be appreciated that the carriage assembly 220 may also include a power source (not shown) for driving the movement of the needle assembly 210.

Therefore, after the needle pulling process is completed at the needle pulling station, the needle pulling assembly 210 is driven by the power source of the carrying assembly 220 and moves along the second slide rail 221, so as to carry the welding needles from the needle pulling station to the transfer station, and release the welding needles to the transmission assembly 230 at the transfer station.

Further, the transfer assembly 230 may include a transfer rail 231, and the transfer rail 231 is used to transfer the welding pins. Specifically, the first end of the conveying track 231 is arranged at the transferring station, the second end of the conveying track 231 is arranged at the collecting station, and the first end of the conveying track 231 is higher than the second end of the conveying track 231, so that the welding pins can be transferred from the transferring station to the collecting station along the conveying track 231 under the action of self gravity.

In a particular use scenario, the welding pin may be a welding pin 10 having a welding pin tip 12 as previously described (see fig. 3). In this regard, the transfer rail 231 may be two mutually parallel slide rods, and the spacing between the slide rods is larger than the diameter of the needle body 11 and smaller than the spacing between the needle tips 12. When the welding pins 10 are placed on the ramp bar, the welding pins 10 can be allowed to ride on the transfer rail 231 due to the support of the welding pin tops 12. Therefore, the welding needle 10 can slide to the material collecting station from the transferring station along the slideway rod under the action of self gravity at the rotating station.

Specifically, when the transfer rail 231 is a slide rod, the second end of the transfer rail 231 is further provided with a baffle 2311 to prevent the welding pin 10 from sliding out of the slide rod. And a third sensor (not shown) may also be provided on the slide bar for counting the number of welding pins 10 that slide past; or when the welding pins 10 are piled up on the runway rod, an alarm is given, etc. It is understood that, according to actual situations, a person skilled in the art may set respective electronic components on the conveying track 231 to know the operation conditions of the conveying track 231 in real time. For example, a sensor for detecting whether the welding pin 10 is intact may be disposed on the conveying track 231, so that when the welding pin 10 pulled out by the needle pulling assembly 210 cannot be reused, a worker is reminded to take out the welding pin, and the like, thereby saving the manual screening step.

Of course, in other embodiments, the conveying track 231 may also adopt a conveyor belt to realize the conveying of the welding pins, which is not described herein again.

In order to allow the both ends of the transfer rail 231 to have a certain height difference, the transfer assembly 230 further includes a first support bar 232, a second support bar 233, and a third support bar 234. The heights of the first support bar 232, the second support bar 233, and the third support bar 234 are gradually reduced. The first support rod 232 is connected to the first end of the transfer rail 231 for supporting the first end of the transfer rail 231; a third support bar 234 is connected to the second end of the transfer rail 231 for supporting the second end of the transfer rail 231; the second support bar 233 is disposed between the first support bar 232 and the third support bar 234 along the transfer direction of the transfer rail 231. The first support block 2321, the second support block 2331 and the third support block 2341 are respectively disposed at one end of the first support bar 232, the second support bar 233 and the third support bar 234 away from the conveying rail 231.

Further, the transportation assembly 230 further includes a fourth supporting seat 235, and the third supporting seat 2341 is slidably disposed on the fourth supporting seat 235 for adjusting the conveying direction of the soldering pins. Wherein, can be equipped with the third slide rail 2352 and the third slider 2351 of mutually supporting on the fourth supporting seat 235, third supporting seat 2341 is connected with third slider 2351, can follow third slide rail 2352 and slide on the fourth supporting seat 235 to adjust the direction that sets up of the second end of transmission track 231, thereby can switch between a plurality of stations of gathering materials comparatively conveniently.

In conclusion, this application has provided a pull out needle subassembly and welding pin recovery unit, through setting up grabbing piece and first driving piece, snatch a snatch the welding pin after, first driving piece can drive and snatch a motion, and then extracts the welding pin from the battery steel casing to battery welded efficiency has been improved. Further, this application is through setting up elastic component and detection piece to can reduce the risk that the welding needle breaks off at the needle in-process of pulling out. The welding pin recovery device in the application can pull out the needle, transport and retrieve the step of letter sorting to the welding pin comparatively conveniently, realizes welding pin automatic cycle and reduction in production cost.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (10)

1. A needle pulling assembly for grabbing and pulling a welding needle at a needle pulling station to pull the welding needle out of a battery steel shell is characterized by comprising:

a first mounting plate;

the grabbing piece is arranged on the first mounting plate in a sliding mode and used for grabbing the welding pins at the pin pulling station; and

the first driving piece is arranged on the first mounting plate, is connected with the grabbing piece and is used for driving the grabbing piece to move away from the battery steel shell after the grabbing piece grabs the welding pins so as to pull out the welding pins from the battery steel shell.

2. The needle extracting assembly as claimed in claim 1, wherein the first mounting plate is provided with a first slide rail and a first slide block which are engaged with each other, the grasping member is provided on the first slide block, and an output end of the first driving member is connected to the first slide block to drive the grasping member to move along the first slide rail toward or away from the battery steel case.

3. The needle extraction assembly of claim 2, further comprising:

the second mounting plate is arranged on the first sliding block;

the guide shaft penetrates through the second mounting plate, and one end of the guide shaft is connected with the grabbing piece;

the limiting plate is arranged at the other end of the guide shaft;

and the elastic piece is sleeved on the guide shaft and is positioned between the limiting plate and the second mounting plate.

4. The needle extracting assembly according to claim 3, further comprising a detecting member, wherein the detecting member is disposed on the limiting plate and/or the second mounting plate, and is configured to detect a distance between the limiting plate and the second mounting plate, so as to determine whether the acting force applied by the grasping member on the welding needle exceeds a preset value through deformation of the elastic member.

5. The needle assembly as recited in claim 4, wherein the detecting member includes a linkage and a first sensor; the connecting rod is arranged on the limiting plate and can move relative to the second mounting plate along with the limiting plate, and the first sensor is arranged on the second mounting plate and is opposite to the connecting rod; or

The connecting rod is arranged on the second mounting plate and can follow the second mounting plate to move relative to the limiting plate, and the first sensor is arranged on the limiting plate and is arranged relative to the connecting rod.

6. The needle assembly as recited in claim 1, wherein the grasping element includes a second drive member and a jaw, the second drive member being coupled to the jaw for driving the jaw in grasping and releasing motions;

and a second sensor is arranged on the clamping jaw and used for detecting whether the welding needle is positioned on the clamping jaw.

7. The needle extracting assembly according to claim 6, wherein the welding needle has a welding needle body and a welding needle top, and the welding needle top is arranged at one end of the welding needle body;

wherein, the clamping jaw is equipped with:

the flange part is used for abutting against the welding needle to be close to the end face of the welding needle main body when the clamping jaw grabs the welding needle; and

and the abutting part is arranged in an arc shape and is attached to the side surface of the welding needle main body when the clamping jaw grabs the welding needle.

8. A welding pin recovery device, comprising:

the needle pulling assembly is used for pulling the welding needle at a needle pulling station;

the carrying assembly is connected with the needle pulling assembly and is used for driving the needle pulling assembly to move back and forth between the needle pulling station and the transferring station; and

the conveying assembly is arranged at the transferring station and used for receiving the welding pins pulled out by the pin pulling assembly and conveying the welding pins to the collecting station so that the welding pins can be reused;

wherein the needle extracting assembly is the needle extracting assembly according to any one of claims 1 to 7.

9. The welding needle recovery device according to claim 8, wherein the carrying assembly comprises a support plate, and a second slide rail and a second slide block which are matched with each other, the second slide rail is arranged on the support plate, and the needle pulling assembly is connected with the second slide block.

10. The welding needle recovery device of claim 8 wherein the transport assembly includes a transport track for transporting the welding needle; wherein, orbital first end of transmission is located transport the station, orbital second end of transmission is located the station of gathering materials, just orbital first end of transmission is higher than orbital second end setting of transmission, so that the welding needle can be under the effect of self gravity, follow transport the station and follow the transmission track shifts to the station of gathering materials.

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