Protective device

Abstract

The protection device comprises a box body, a baffle and a driving assembly, the box body comprises a box shell, the box shell is used for installing a welding head, the baffle is rotationally connected to the box shell, the baffle is provided with a welding hole deviating from a rotating shaft of the baffle, the welding hole is used for allowing a light beam of the welding head to penetrate through, and the output end of the driving assembly is connected with the baffle. The driving assembly is used for driving the baffle to rotate. The baffle is located between the workpiece and the welding head, and the welding head is located over the track of the welding hole. The welding head emits a laser, the laser penetrates through the welding hole to weld the workpiece, meanwhile, the baffle rotates by a circle, splashing welding slag generated by welding is attached to the end face, away from the welding head, of the baffle, and therefore the situation that the welding head is damaged by the welding slag is reduced, and the welding slag is collected to the baffle. And then the welding head emits the next laser, the baffle rotates by one circle again, and the steps are repeated till welding is completed.

Description

Technical Field

[0001] The utility model relates to the field of light beam welding, in particular to a protective device. Background Art

[0002] In the lithium-ion battery industry, beam welding technology is widely used due to its high efficiency and precision, particularly in the welding of voltage collection terminals to cylindrical battery cells. To meet the welding requirements of thin-sheet materials and avoid material ablation failure due to excessive heat input, the industry typically uses pulsed laser welding for spot welding. The principle of pulsed laser welding is to apply high-energy pulsed laser light in a short period of time to achieve rapid heating and cooling of the material, thereby reducing the heat-affected zone.

[0003] During pulsed laser welding, noticeable sparks fly during the laser beam's transitions. To prevent slag from damaging delicate optical lenses, the industry generally employs a side-blowing air knife to remove the slag from its path. However, while this approach effectively protects the lens, it also creates the problem of slag splatter, making it difficult to clean and potentially causing safety incidents. This is particularly problematic in the safety-critical lithium battery industry. Utility Model Content

[0004] One purpose of the present utility model is to provide a protective device, which aims to solve the technical problem that the lens is easily damaged by the welding slag caused by the splashing of welding slag during pulse laser welding.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a solution: a protective device, characterized in that it includes:

[0006] The box body includes a box shell, and the box shell is used to install the welding head;

[0007] The baffle is rotatably connected to the box shell, and the baffle is provided with a welding hole deviating from its rotation axis, and the welding hole is for the light beam of the welding head to pass through;

[0008] The driving component has an output end connected to the baffle, and the driving component is used to drive the baffle to rotate.

[0009] Optionally, there are multiple welding holes, and the multiple welding holes are arranged at equal intervals around the rotation axis of the baffle.

[0010] Optionally, the protective device includes a slag collecting bucket and a filter brush. The slag collecting bucket includes a bucket body, which is arranged in the box shell. A slag collecting space is formed inside the bucket body. The filter brush is arranged in the slag collecting space. The filter brush includes bristles, one end of the bristles protrudes from the slag collecting space and abuts against the end face of the baffle away from the welding head.

[0011] Optionally, the slag collecting bucket includes a plurality of card blocks, which are spaced apart inside the slag collecting space and are all connected to the bucket body;

[0012] The filter residue brush comprises a fixing bar which is inserted between a plurality of clamping blocks and abuts against the clamping blocks; and the bristles are connected to the fixing bar and abut against the baffle.

[0013] Optionally, the filter residue brush is arranged along the radial direction of the baffle.

[0014] Optionally, the brush surface of the filter residue brush facing the baffle is arranged at an obtuse angle to the rotation direction of the baffle.

[0015] Optionally, the box body includes a guide portion, the box shell is provided with a through hole, the through hole is used for the bucket body to pass through and out of the box shell, the guide portion is arranged inside the box shell to form a sliding cavity, and the bucket body is slidably arranged in the box shell through the sliding cavity.

[0016] Optionally, the box shell includes a limiting portion, which is arranged in the box shell and is used to support the end of the bucket body away from the through hole.

[0017] Optionally, the driving assembly includes a driving member, a first bevel gear, a second bevel gear, a connecting shaft and a coupling, one end of the connecting shaft is coaxially connected to the first bevel gear, and the other end is connected to the output end of the driving member through a coupling, the first bevel gear and the second bevel gear are meshed and connected, the rotating axes of the first bevel gear and the second bevel gear are perpendicular to each other, the first bevel gear and the output end of the driving member are coaxially connected, and the second bevel gear is coaxially connected to the baffle.

[0018] Optionally, the box body includes a connecting plate and a rib plate, the connecting plate is arranged on the box shell, the connecting plate is used to install the welding head, one end of the rib plate is connected to the box shell, and the other end is connected to the connecting plate.

[0019] The beneficial effects of the present invention are:

[0020] The protective device includes a housing, a baffle, and a drive assembly. The housing includes a housing shell for mounting the welding head. The baffle is rotatably connected to the housing shell. The baffle has a welding hole that deviates from its rotation axis, and the welding hole is used to allow the welding head's light beam to pass through. The drive assembly is disposed in the housing shell, and the output end of the drive assembly is connected to the baffle. The drive assembly is used to drive the baffle to rotate. The baffle is located between the workpiece and the welding head, and the welding head is located directly above the welding hole trajectory. The welding head emits a laser beam, which passes through the welding hole to weld the workpiece. At the same time, the baffle rotates one circle, causing the spattered slag produced by the welding to adhere to the end face of the baffle away from the welding head, thereby reducing the possibility of the slag damaging the welding head and collecting the slag on the baffle. The welding head then emits the next laser beam, and the baffle rotates another circle, repeating the above steps until the welding is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of the protective device and the welding head provided by the embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of the protective device provided by an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of a partial structure of a driving assembly provided by an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of a partial structure of a slag collecting bucket provided in an embodiment of the present utility model;

[0026] Figure 5 This is a schematic cross-sectional view of a filter brush provided in an embodiment of the present invention;

[0027] Figure 6 It is a partial structural schematic diagram provided by an embodiment of the present utility model for showing the angle between the brush surface of the filter residue brush facing the baffle and the rotation direction of the baffle.

[0028] Description of Figure Numbers:

[0029] 20. Box body; 21. Box shell; 211. Through hole; 22. Guide part; 23. Sliding cavity; 24. Connecting plate; 25. Rib; 26. Limiting part; 30. Welding head; 31. Light beam; 40. Baffle; 41. Welding hole; 50. Drive assembly; 51. Drive member; 52. First bevel gear; 53. Second bevel gear; 54. Connecting shaft; 55. Coupling; 60. Slag collecting bucket; 61. Bucket body; 611. Slag collecting space; 62. Block; 70. Filter brush; 71. Bristles; 72. Fixing bar; 80. First direction; 90. Second direction. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the overall structure of the protective device and the welding head 30 provided in the embodiment of the utility model. Figure 2 It is a schematic diagram of the overall structure of the protective device provided by an embodiment of the utility model.

[0032] The present invention provides a protective device, comprising:

[0033] The box body 20 includes a box shell 21, and the box shell 21 is used to install the welding head 30;

[0034] The baffle 40 is rotatably connected to the housing 21. The baffle 40 is provided with a welding hole 41 that is offset from its rotation axis. The welding hole 41 allows the light beam 31 of the welding head 30 to pass through.

[0035] The driving assembly 50 has an output end connected to the baffle 40 , and the driving assembly 50 is used to drive the baffle 40 to rotate.

[0036] In order to enable those skilled in the art to have a further understanding of this solution, the principle of pulse laser welding will be explained in detail below.

[0037] Pulsed laser welding is a welding technology that uses intermittent high-energy laser pulses to precisely heat the material locally. Its characteristic is that the heat input is precisely adjusted by controlling the pulse width, energy, and frequency, thereby achieving rapid melting and solidification of the material, forming a strong weld, while minimizing the heat-affected zone, reducing material deformation and residual stress. It is suitable for precision welding and joining heat-sensitive materials. Compared with continuous-wave laser welding, pulsed laser welding may have a slower welding speed, but the precise control it provides makes it more ideal for applications requiring fine welding.

[0038] In practice, baffle 40 is positioned between the workpiece and welding head 30, with the welding head 30 positioned directly above the trajectory of weld hole 41. The welding head 30 emits a laser beam, which passes through weld hole 41 to weld the workpiece. Simultaneously, baffle 40 rotates one revolution, causing weld slag to adhere to the end face of baffle 40 facing away from the welding head 30. This reduces damage to the welding head 30 and collects the slag on baffle 40. The welding head 30 then emits the next laser beam, and baffle 40 rotates another revolution, repeating the above steps until welding is complete.

[0039] Furthermore, there are multiple welding holes 41 , and the multiple welding holes 41 are arranged at equal intervals around the rotation axis of the baffle 40 .

[0040] In practice, after the welding head 30 emits a laser beam, the baffle 40 rotates until the adjacent welding hole 41 is aligned with the welding head 30, and the above steps are repeated until welding is completed. Multiple welding holes 41 can reduce the angle of each rotation of the baffle 40, thereby reducing the required speed of the output end of the drive assembly 50 and reducing the cost of the protective device.

[0041] Optionally, see Figure 3 and Figure 4 The protective device includes a slag collecting bucket 60 and a slag brush 70. The slag collecting bucket 60 includes a bucket body 61. The bucket body 61 is arranged in the box shell 21. A slag collecting space 611 is formed inside the bucket body 61. The slag brush 70 is arranged in the slag collecting space 611. The slag brush 70 includes bristles 71. One end of the bristles 71 protrudes from the slag collecting space 611 and abuts against the end face of the baffle 40 away from the welding head 30.

[0042] In actual application, the welding slag splashes and adheres to the end face of the baffle 40 away from the welding head 30, and the baffle 40 rotates one circle. Since the bristles 71 abut against the end face of the baffle 40 away from the welding head 30, that is, the bristles 71 abut against the end face of the baffle 40 for adhering the welding slag, during the rotation of the baffle 40, the bristles 71 clean the welding slag attached to the baffle 40 into the slag collecting space 611, thereby transferring the welding slag collected by the baffle 40 to the slag collecting space 611 inside the bucket body 61.

[0043] In the embodiment of the present application, the cross-sectional shape of the bristles 71 is an isosceles trapezoid, with the base of the isosceles trapezoid positioned near one end of the baffle 40. The cross-sectional shape of the bristles 71 may also be a rectangle or other shape. The bristles 71 are made of nylon, but may also be made of PP, PBT, metal wire, or abrasive wire.

[0044] Further, see Figure 4 and Figure 5 The slag collecting bucket 60 includes a plurality of card blocks 62, which are arranged at intervals inside the slag collecting space 611 and are all connected to the bucket body 61;

[0045] The filter residue brush 70 includes a fixing bar 72 , which is inserted between the plurality of blocks 62 and abuts against the blocks 62 . The bristles 71 are connected to the fixing bar 72 and abut against the baffle 40 .

[0046] In actual use, the multiple clamping blocks 62 can fix the filter brush 70, improving the stability of the filter brush 70 when the baffle 40 rotates. When the filter brush 70 needs to be replaced, the operator pulls out the fixing bar 72 and then inserts the fixing bar 72 of the new filter brush 70 between the multiple clamping blocks 62, thereby fixing the new filter brush 70 between the multiple clamping blocks 62. This design facilitates the replacement of the filter brush 70.

[0047] In this embodiment, there are four clamping blocks 62 arranged in a rectangular array. The clamping blocks 62 are rectangular strips, and the fixing bars 72 can be inserted and embedded between the four clamping blocks 62. In other embodiments, the number of clamping blocks 62 can be two long strips that span the slag collecting hopper 60, or multiple clamping blocks 62 can be arranged at intervals.

[0048] Optionally, see Figure 3 and Figure 4 The filter residue brush 70 is arranged along the radial direction of the baffle 40.

[0049] In actual use, the filter brush 70 is arranged along the radial direction of the baffle 40, so that the rotation direction of the baffle 40 is tangential to the length direction of the filter brush 70. When the baffle 40 rotates, the welding slag contacts the bristles 71, and the force applied to the welding slag is perpendicular to the length direction of the filter brush 70, so that the welding slag does not move along the length direction of the filter brush 70, thereby reducing the possibility of welding slag falling out of the slag collection space 611 and improving the welding slag collection effect of the slag collection hopper 60.

[0050] Optionally, refer to Figure 6 The rotation direction of the baffle 40 is represented by a first direction 80, and the brush surface of the filter residue brush 70 facing the baffle 40 is represented by a second direction 90. The angle between the brush surface of the filter residue brush 70 facing the baffle 40 and the rotation direction of the baffle 40 is the angle between the first direction 80 and the second direction 90. The brush surface of the filter residue brush 70 facing the baffle 40 is arranged at an obtuse angle to the rotation direction of the baffle 40. That is, along the first direction 80, the length of the bristles 71 of the filter residue brush 70 gradually increases, so that a gap is formed between one end of the filter residue brush 70 and the baffle 40, and the other end abuts the baffle 40.

[0051] In actual application, welding slag with particle size larger than the gap size is first cleaned into the slag collection space 611 by the bristles 71, and welding slag with particle size smaller than the gap size first enters the gap between the filter slag brush 70 and the baffle 40, and then is cleaned into the slag collection space 611 by the filter slag brush 70, and along the first direction 80, the force applied by the bristles 71 to the welding slag gradually increases, so that the welding slag that is easy to fall off falls into the slag collection space 611 first, and the welding slag that is not easy to fall off falls into the slag collection space 611 later, thereby reducing the accumulation of welding slag.

[0052] Optionally, refer to Figure 2 and Figure 4 The box body 20 includes a guide portion 22, and the box shell 21 is provided with a through hole 211, which is used for the bucket body 61 to pass through and out of the box shell 21. The guide portion 22 is arranged inside the box shell 21 to form a sliding cavity 23, and the bucket body 61 is slidably arranged in the box shell 21 through the sliding cavity 23.

[0053] In actual use, when it is necessary to clean the welding slag in the slag collecting space 611, the operator pulls the bucket 61 out of the box shell 21 through the through hole 211, pours the welding slag out of the slag collecting space 611, and then pushes the bucket 61 into the box shell 21 through the through hole 211. The sliding cavity 23 formed by the guide portion 22 can limit the movement direction of the bucket 61, thereby facilitating the operator to push and pull the bucket 61.

[0054] In this embodiment, there are four guide parts 22, which are arranged at intervals along a rectangular array. A rectangular sliding cavity 23 is formed between the four guide parts 22. When the bucket body 61 slides in the sliding cavity 23, the guide part 22 abuts against the bucket body 61.

[0055] Further, refer to Figure 4 The box shell 21 includes a limiting portion 26 , which is disposed in the box shell 21 . The limiting portion 26 is used to support an end of the bucket body 61 away from the through hole 211 .

[0056] In actual application, the operator pushes the bucket body 61 into the box shell 21 until the bucket body 61 abuts against the limiter 26. The limiter 26 is used to reduce friction and collision between the side wall of the bucket body 61 and the box shell 21, thereby increasing the service life of the bucket body 61.

[0057] Optionally, refer to Figure 3 The driving assembly 50 includes a driving member 51, a first bevel gear 52, a second bevel gear 53, a connecting shaft 54 ​​and a coupling 55. The driving member 51 is a motor. One end of the connecting shaft 54 ​​is coaxially connected to the first bevel gear 52, and the other end is connected to the output end of the driving member 51 through the coupling 55. The first bevel gear 52 and the second bevel gear 53 are meshed and connected. The rotating axes of the first bevel gear 52 and the second bevel gear 53 are perpendicular to each other. The first bevel gear 52 and the output end of the driving member 51 are coaxially connected, and the second bevel gear 53 is coaxially connected to the baffle 40.

[0058] In actual use, the motor drives the first bevel gear 52 via the connecting shaft 54, which in turn drives the second bevel gear 53, which in turn drives the baffle 40. The first bevel gear 52 and the second bevel gear 53 enable the rotation axis of the output end of the driving member 51 to be staggered with the rotation axis of the baffle 40, thereby saving space occupied by the protective device.

[0059] Optionally, refer to Figure 1 and Figure 2 The box body 20 includes a connecting plate 24 and a rib 25. The connecting plate 24 is arranged on the box shell 21. The connecting plate 24 is used to install the welding head 30. One end of the rib 25 is connected to the box shell 21, and the other end is connected to the connecting plate 24.

[0060] In practical applications, the welding head 30 is connected to the connecting plate 24 by bolts, and the ribs 25 can increase the structural strength of the whole formed by the connecting plate 24 and the box shell 21.

[0061] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship and movement status of the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0062] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0063] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0064] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A protective device, characterized in that: include: A box body, comprising a box shell, and the box shell is used to install the welding head; a baffle, the baffle being rotatably connected to the box shell, the baffle being provided with a welding hole deviating from its rotation axis, the welding hole being for a light beam of a welding head to pass through; A driving assembly, wherein the output end of the driving assembly is connected to the baffle, and the driving assembly is used to drive the baffle to rotate.

2. The protective device according to claim 1, characterized in that There are multiple welding holes, and the multiple welding holes are arranged at equal intervals around the rotation axis of the baffle.

3. The protective device according to claim 1, characterized in that The protective device includes a slag collecting bucket and a filter brush. The slag collecting bucket includes a bucket body, which is arranged in the box shell. A slag collecting space is formed inside the bucket body. The filter brush is arranged in the slag collecting space. The filter brush includes bristles, one end of the bristles protrudes from the slag collecting space and abuts against the end face of the baffle away from the welding head.

4. The protective device according to claim 3, characterized in that: The slag collecting bucket includes a plurality of card blocks, which are arranged at intervals inside the slag collecting space and are all connected to the bucket body; The filter residue brush includes a fixing bar, which is inserted between the plurality of clamping blocks and abuts against the clamping blocks. The bristles are connected to the fixing bar and abut against the baffle.

5. The protective device according to claim 3, characterized in that: The filter residue brush is arranged along the radial direction of the baffle.

6. The protective device according to claim 3, characterized in that: The brush surface of the filter residue brush facing the baffle is arranged at an obtuse angle to the rotation direction of the baffle.

7. The protective device according to claim 3, characterized in that: The box body includes a guide portion, the box shell is provided with a through hole, the through hole is used for the bucket body to pass through and out of the box shell, the guide portion is arranged inside the box shell to form a sliding cavity, and the bucket body is slidably arranged in the box shell through the sliding cavity.

8. The protective device according to claim 7, characterized in that: The box shell includes a limiting portion, which is arranged in the box shell and is used to support an end of the bucket body away from the through hole.

9. The protection device according to any one of claims 1 to 8, characterized in that: The driving assembly includes a driving member, a first bevel gear, a second bevel gear, a connecting shaft and a coupling. One end of the connecting shaft is coaxially connected to the first bevel gear, and the other end is connected to the output end of the driving member through the coupling. The first bevel gear and the second bevel gear are meshed and connected. The rotating axes of the first bevel gear and the second bevel gear are perpendicular to each other. The first bevel gear and the output end of the driving member are coaxially connected, and the second bevel gear is coaxially connected to the baffle.

10. The protective device according to any one of claims 1 to 8, characterized in that: The box body includes a connecting plate and a rib plate. The connecting plate is arranged on the box shell and is used to install the welding head. One end of the rib plate is connected to the box shell, and the other end is connected to the connecting plate.

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