Workpiece positioning mechanism, workpiece positioning method and welding device

Abstract

The invention discloses a workpiece positioning mechanism, a workpiece positioning method and a welding device, and belongs to the field of welding equipment. The workpiece positioning mechanism comprises a supporting assembly, a clamping assembly, a bearing assembly and a limiting piece, the bearing assembly is connected with the supporting assembly and can do lifting motion on the supporting assembly, the bearing assembly comprises a bearing piece, the bearing piece is used for bearing a workpiece, the clamping assembly is connected with the supporting assembly, and the limiting piece is used for limiting the clamping assembly. The clamping assembly is arranged above the bearing assembly and used for clamping the workpiece; the limiting piece can be static relative to the supporting assembly, and when the bearing assembly drives the workpiece to ascend by a preset distance, the workpiece abuts against the limiting piece. The workpiece positioning mechanism can eliminate the tolerance of different workpieces in height.

Description

Technical Field

[0001] The invention belongs to the field of welding equipment, and in particular relates to a workpiece positioning mechanism, a positioning method of the positioning mechanism and a welding device provided with the positioning mechanism. Background Art

[0002] Due to the limitations of conventional energy and the increasing prominence of environmental problems, people are gradually inclined to use new energy technologies. In the automotive industry, people are gradually turning from gasoline power to electric power. This shift has led to the rapid development of new energy technologies, and new energy batteries have also emerged.

[0003] In the manufacturing process of new energy batteries, it is usually necessary to weld the battery cell to the collector plate, or the battery cell to the shell. In the process of welding the collector plate to the battery cell, or the battery cell to the shell, it is necessary to position the collector plate and the battery cell, or the battery cell and the shell.

[0004] However, traditional welding devices use complex mechanical devices to align the battery cells, which makes alignment accuracy difficult, resulting in unsatisfactory welding results, which in turn affects the quality of the resulting new energy batteries. Summary of the invention

[0005] The present application provides a workpiece positioning mechanism, a workpiece positioning method and a welding device, which can eliminate the height tolerance of different workpieces.

[0006] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, the present application provides a workpiece positioning mechanism, comprising

[0008] A support assembly, a clamping assembly, a bearing assembly and a limiting member, wherein the bearing assembly is connected to the support assembly and can perform lifting and lowering movements on the support assembly, the bearing assembly includes a bearing member, and the bearing member is used to bear a workpiece, the clamping assembly is connected to the support assembly and is arranged above the bearing assembly, and the clamping assembly is used to clamp the workpiece;

[0009] The limiting member can be relatively still with respect to the supporting assembly, and when the bearing assembly drives the workpiece to rise a preset distance, the workpiece abuts against the limiting member.

[0010] According to some embodiments of the present application, the limiting member is fixed on the clamping assembly, and when the supporting assembly drives the workpiece to rise, the clamping assembly releases the workpiece to facilitate the workpiece to rise.

[0011] According to some embodiments of the present application, the clamping assembly includes a pair of jaws and a jaw power member, the jaw power member is connected to the pair of jaws, and is used to drive the pair of jaws to move relatively close to and relatively away from each other, the pair of jaws are relatively close to each other to clamp the workpiece, and the limit member is fixed on the opposite surfaces of the jaws, and the limit member can abut against the workpiece.

[0012] According to some embodiments of the present application, the limiting member includes a pressure cover, which is fixed on the pair of clamping jaws, and the pressure cover has a protrusion protruding from the edges of the opposite surfaces of the pair of clamping jaws, and the protrusion can abut against the workpiece.

[0013] According to some embodiments of the present application, a clamping assembly is further included, wherein the clamping assembly includes a pressing block, and the pressing block is movably arranged on the supporting assembly. The pressing block can perform lifting and lowering movements on the supporting assembly and be fixed at a preset position of the supporting assembly.

[0014] According to some embodiments of the present application, the clamping assembly also includes a pressure block fixing seat, a slider mounting seat, a guide rail and a pressure block cylinder, the guide rail is fixed on the support assembly, the slider mounting seat is movably arranged on the guide rail, the pressure block fixing seat is arranged on the slider mounting seat, the pressure block is fixed on the pressure block fixing seat, and the pressure block cylinder is connected to the pressure block fixing seat to drive the pressure block fixing seat to move along the guide rail, thereby driving the pressure block to perform lifting and lowering movements on the support assembly.

[0015] According to some embodiments of the present application, the bearing assembly includes a support cup, a fixed platform and a lifting assembly, the fixed platform is arranged on the support assembly, the support cup is placed on the fixed platform for positioning the workpiece, the lifting assembly is arranged at the bottom of the fixed platform, and the lifting assembly can drive the fixed platform to perform lifting movements; the lifting assembly includes a lifting cylinder, a guide shaft and a lifting bearing, the lifting bearing and the lifting cylinder are fixed on both sides of the fixed platform, the guide shaft is arranged in the lifting bearing, and the lifting cylinder drives the fixed platform to perform lifting movements.

[0016] According to some embodiments of the present application, the bearing assembly also includes a height compensation assembly, which is fixed on a fixed platform, and the height compensation assembly includes a height compensation bearing, a height compensation bearing mounting seat, an elastic member and a fixed shaft; one end of the fixed shaft is fixedly connected to the fixed platform, the elastic member is sleeved on the fixed shaft and is together arranged in the height compensation bearing, the height compensation bearing is fixed on the height compensation bearing mounting seat, and the height compensation bearing mounting seat is fixed to the guide shaft.

[0017] In a second aspect, the present application provides a workpiece positioning method, which is implemented using the workpiece positioning mechanism described in any one of the first aspects, and is characterized by comprising:

[0018] The workpiece is manually placed on the carrier, and the clamping assembly clamps and centers the workpiece;

[0019] The limiting member is fixed at a preset position;

[0020] The bearing assembly lifts the workpiece to a predetermined height and then abuts against the limiting member.

[0021] In a third aspect, the present application provides a welding device, comprising a workpiece positioning mechanism, a frame and a welding mechanism as described in any one of the first aspects, wherein the workpiece positioning mechanism is arranged on the frame, and the welding mechanism is connected to the frame for welding the workpiece.

[0022] The beneficial effects of the present invention compared with the prior art are:

[0023] The workpiece positioning mechanism provided by the present invention adopts a clamping assembly and a bearing assembly that move relative to the supporting assembly and a limiting member that can be stationary relative to the supporting assembly. The limiting member limits the rising height of the workpiece, thereby eliminating the height tolerance of workpieces of different heights.

[0024] The workpiece positioning method provided by the present invention fixes the clamping assembly on the supporting assembly and uses the fixed clamping assembly as a limiter to limit the rising height of the workpiece, and the operation method is simple;

[0025] Manual loading is adopted, and mechanical and electrical control is used to ensure the welding process and accuracy of the collector plate and the battery cell, and the battery cell and the shell, thus realizing welding automation;

[0026] Through the integration of multiple workstations, the welding functions of positive and negative collector plates and battery cells, as well as shell and battery cells are integrated;

[0027] The integrated design of the welding device is simple and adjustable, compatible with different cell sizes and heights, and can also perform precision compensation for cells of different heights;

[0028] The cup is used for rough positioning, and the positioning claws are used to achieve fine positioning of the battery cell, ensuring the positioning accuracy of the battery cell. The guide grooves on the fixing plate of the collector plate ensure the accurate positioning of the collector plate. The mechanism is adjustable, the parts are universally designed, and the compatibility is high. The concentricity between the collector plate and the battery cell, and the concentricity between the shell and the battery cell are also guaranteed.

[0029] The battery cell is lifted and lowered on the support assembly by a predetermined distance, and then a limiter fixed relatively to the support assembly is used to realize the vertical positioning of the battery cell, eliminating the tolerance of battery cells at different heights. The limiter can be set on the clamping jaw to control the rise of the battery cell by forming a protrusion with the edge of the clamping jaw, or the pressure block that can be freely lifted and lowered on the support assembly can be used as a limiter;

[0030] The lifting cylinder lifts the battery cell and the pressing block presses down to ensure that there is a certain welding pre-tightening force between the collector plate and the battery cell, and between the shell and the battery cell, to ensure the reliability and stability of the subsequent welding between the collector plate and the battery cell, and between the battery cell and the shell. A height compensation component is provided at the bottom of the battery cell. The height compensation component includes a spring buffer mechanism, which has a high precision compensation effect for different battery cell heights;

[0031] Furthermore, the welding device provided by the present invention also includes a universal curved tube and a nitrogen blowing block. The universal curved tube can be used for blowing and dust removal, and the nitrogen blowing block can receive nitrogen as a welding shielding gas. Its main function in welding is to remove oxygen during the welding process, increase weldability, and prevent re-oxidation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0033] Figure 1 Schematic diagram of the welding device provided for this application;

[0034] Figure 2 A schematic diagram of the first state of three welding stations provided for this application;

[0035] Figure 3 A schematic diagram of the second state of three welding stations provided for this application;

[0036] Figure 4 Front view of the three welding stations provided for this application;

[0037] Figure 5 A front view of a single welding station provided for this application;

[0038] Figure 6 A schematic diagram of the structure of a single welding station provided for this application;

[0039] Figure 7 A schematic diagram of the back structure of a single welding station provided for this application;

[0040] Figure 8 A partial structural front view of a single welding station provided for this application;

[0041] Fig. 9 A schematic diagram of the structure of the clamping jaw assembly of the collector plate welding station provided in this application;

[0042] Fig.10 A front view of the clamping jaw assembly of the collector plate welding station provided in the present application;

[0043] Fig.11 A schematic diagram of the structure of the clamping jaw assembly of the shell welding station provided in the present application;

[0044] Fig.12 A front view of the clamping jaw assembly of the shell welding station provided for this application;

[0045] Fig.13 A schematic diagram of the height compensation component structure provided for this application;

[0046] Fig.14 A front view of the height compensation assembly provided for this application;

[0047] Fig.15 Schematic diagram of the rack assembly provided for this application;

[0048] Fig.16 Schematic diagram of the welding mechanism provided for this application;

[0049] Fig.17 Schematic diagram of the optical fiber fixing seat assembly provided in this application.

[0050] The reference numerals in the figures are:

[0051] 100, rack assembly; 101, rack; 102, laser; 103, chiller; 104, CNC system; 105, storage box; 106, pedal; 107, button;

[0052] 110. Positioning mechanism;

[0053] 111. Negative electrode collector and battery core welding station;

[0054] 1. Support assembly; 11. Bottom plate; 12. Vertical plate; 13. Bottom plate adjustment seat;

[0055] 2. Clamping assembly;

[0056] 22. Clamping jaw assembly; 221. Left clamping jaw; 222. Right clamping jaw; 223. Clamping jaw bearing; 224. Clamping jaw bearing guide shaft; 225. Clamping jaw bearing guide shaft fixing seat; 226. Fixing bolt; 227. Adjusting bolt; 228. Limiting member; 229. Guide slideway;

[0057] 23. Gripper adjustment assembly; 231. Gripper cylinder; 232. Gripper cylinder adjustment seat; 233. Gripper cylinder fixing seat; 234. Gripper adjustment bolt; 235. Gripper fixing seat;

[0058] 3. Load-bearing assembly; 31. Fixed platform; 32. Load-bearing member;

[0059] 33. Lifting assembly; 331. Lifting cylinder; 332. Guide shaft; 333. Lifting bearing; 334. Lifting limiter;

[0060] 4. Clamping assembly; 40. Pressing block; 41. Pressing block fixing seat; 42. Slider mounting seat; 43. Guide rail; 44. Pressing block cylinder; 45. Lower pressing plate limiter; 46. Floating joint; 47. Stopper;

[0061] 5. Height compensation component; 51. Height compensation bearing; 52. Height compensation bearing mounting seat; 53. Elastic member; 54. Fixed shaft; 55. Limiting disc; 56. Gasket;

[0062] 112. Positive electrode collector and battery core welding station;

[0063] 113. Shell bottom and battery core welding station;

[0064] 120. Welding mechanism;

[0065] 121, optical fiber fixing seat assembly; 1211, optical fiber line guide sleeve; 1212, fixing seat; 1213, fixing plate; 1214, supporting rod; 1215, optical fiber fixing shaft; 1216, optical fiber rotating shaft; 1217, bearing with seat; 1218, second fixing clamp; 1219, second fixing clamp; 1210, locking nut;

[0066] 122. X-axis screw motion platform; 123. Z-axis screw motion platform; 124. galvanometer; 125. wind knife assembly; 126. support frame; 127. X-axis servo motor; 128. Z-axis servo motor.

[0067] 61. Universal curved pipe; 62. Nitrogen blowing block; 63. Universal curved pipe mounting seat; 64. Pipe joint. DETAILED DESCRIPTION

[0068] The following description provides specific application scenarios and requirements of this specification, with the purpose of enabling those skilled in the art to make and use the contents of this specification. Various local modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but to the widest scope consistent with the claims.

[0069] The terms used herein are only used for the purpose of describing specific example embodiments and are not restrictive. For example, unless the context clearly indicates otherwise, as used herein, the singular forms "a", "an" and "the" may also include plural forms. When used in this specification, the terms "include", "comprise" and / or "contain" mean that the associated integers, steps, operations, elements and / or components exist, but do not exclude the existence of one or more other features, integers, steps, operations, elements, components and / or groups or that other features, integers, steps, operations, elements, components and / or groups may be added in the system / method.

[0070] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0071] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0072] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0073] In view of the following description, these and other features of the present specification, as well as the operation and function of the related elements of the structure, and the economy of the combination and manufacture of the parts can be significantly improved. Reference is made to the accompanying drawings, all of which form a part of this specification. However, it should be clearly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0074] Due to the limitations of conventional energy and the increasing prominence of environmental problems, people are gradually inclined to use new energy technologies. In the automotive industry, people are gradually turning from gasoline power to electric power. This shift has led to the rapid development of new energy technologies, and new energy batteries have also emerged.

[0075] In the manufacturing process of new energy batteries, it is usually necessary to weld the battery cell to the collector plate, or the battery cell to the shell. In the process of welding the collector plate to the battery cell, or the battery cell to the shell, it is necessary to position the collector plate and the battery cell, or the battery cell and the shell.

[0076] However, traditional welding devices use complex mechanical devices to align the battery cells, which makes alignment accuracy difficult, resulting in unsatisfactory welding results, which in turn affects the quality of the resulting new energy batteries.

[0077] Example 1

[0078] like Figure 1 As shown, it is a schematic diagram of the welding device of the present application, which includes a frame assembly 100, a positioning mechanism 110 and a welding mechanism 120. The positioning mechanism 110 and the welding mechanism 120 are arranged on the frame assembly 100. The positioning mechanism 110 can position the battery cell and the collector plate or the shell, and the welding mechanism 120 can weld and fix the positioned battery cell to the collector plate or the shell.

[0079] In the positioning mechanism 110 of this embodiment, three welding stations are provided, namely, the negative collector plate and the battery core welding station 111, the positive collector plate and the battery core welding station 112, and the shell bottom and the battery core welding station 113. These three stations independently perform the positioning welding operations of the negative collector plate and the battery core, the positive collector plate and the battery core, and the shell and the battery core. The welding mechanism 120 welds the battery core workpieces that have been positioned at the three welding stations.

[0080] It should be noted that the present embodiment is explained by taking the example of setting three welding stations, and the positioning welding objects of the three welding stations are different. In other embodiments, a welding device can be provided with one welding station, two welding stations, four welding stations, five welding stations, etc., and the battery cells can be precisely positioned and welded at their respective stations. Similarly, the positioning welding objects of the welding stations can also be adjusted to meet different production requirements. For example, in other embodiments, the positioning welding objects of the welding stations can be selected to perform positioning welding on the battery cells and the negative electrode collector plates in order to control the welding quality and improve production efficiency, or different positioning welding objects can be selected to improve production flexibility.

[0081] like Figure 2 and Figure 3As shown, it is a schematic diagram of the change between the first state and the second state of the three welding stations. The negative electrode collector plate and the battery cell welding station 111 is taken as an example for explanation below. The negative electrode collector plate and the battery cell welding station 111 includes a support assembly 1, a clamping assembly 2 and a bearing assembly 3. The support assembly 1 includes a bottom plate 11 and a vertical plate 12, and the vertical plate 12 is vertically arranged on the bottom plate 11, and one side of the bottom plate 11 and the vertical plate 12 are fixedly connected. Bottom plate adjustment seats 13 are provided at the four corners of the bottom plate 11, which can adjust the position of the vertical plate 12 on the bottom plate 11, so as to facilitate adaptive adjustment according to the thickness of different battery cells.

[0082] The clamping assembly 2 is arranged on the vertical plate 12, and the bearing assembly 3 is arranged on the bottom plate 11. The clamping assembly 2 and the bearing assembly 3 are arranged relative to each other in the vertical direction, so that when the battery cell is placed on the bearing assembly 3, the clamping assembly 2 can clamp the battery cell. The limiter 228 is arranged on the clamping assembly 2, and when the clamping assembly 2 is fixed, the limiter 228 can be relatively still with the support assembly 1. When the bearing assembly 3 drives the battery cell to rise a preset distance, the limiter 228 can abut against the battery cell to realize the vertical positioning of the battery cell.

[0083] It should be noted that the preset height described in this embodiment is determined according to the height of the battery cell itself and the height of the welding head.

[0084] like Figure 4 As shown, it is a front view of three welding stations. In order to facilitate the subsequent welding operation, a clamping assembly 4 is also provided on the negative electrode current collector and the battery cell welding station 111. After the battery cell is positioned, the current collector is manually placed, and the clamping assembly 4 is driven to press down and clamp the current collector and the battery cell, and then the two are welded. The clamping assembly 4 can ensure that the positioned battery cell will not deviate.

[0085] like Figure 6 As shown, the clamping assembly 4 includes a clamp 40, a clamp fixing seat 41, a slider mounting seat 42, a guide rail 43, and a clamp cylinder 44. The guide rail 43 is fixed on the vertical plate 12, the slider mounting seat 42 is movably arranged on the guide rail 43, the clamp fixing seat 41 is arranged on the slider mounting seat 42, the clamp 40 is fixed on the clamp fixing seat 41, and the clamp cylinder 44 is connected to the clamp fixing seat 41 to drive the clamp fixing seat 41 to move along the guide rail 43, thereby driving the clamp 40 to move up and down on the vertical plate 12. In order to prevent the clamp 40 from pressing down too long, a lower clamping plate limiter 45 is also fixed on the vertical plate 12 to limit the pressing distance of the clamp 40.

[0086] The pressure block fixing seat 41 is also provided with a nitrogen blowing block 62, which can receive nitrogen and remove oxygen during welding, increase weldability, and prevent reoxidation. The vertical plate 12 is also fixed with a stopper 47 to limit the position of the guide rail 43 to prevent the guide rail 43 from deflecting.

[0087] It should be noted that, in order to achieve the contact between the stopper 228 and the battery cell, the stopper 228 fixed on the clamping assembly 2 should be located on the ascending path of the battery cell. At the same time, in order to facilitate the ascending movement of the battery cell and avoid damage to the surface of the battery cell, the clamping assembly 2 should maintain the clamping state but release the battery cell when the battery cell rises.

[0088] like Figure 7 As shown, the floating joint is fixed to the top of the vertical plate 12 and is threadedly connected to the pressing block fixing seat 41 to minimize displacement and deformation between the pressing block 40 and the pressing block cylinder 44. The universal curved pipe mounting seat 63 is fixed to the vertical plate 12 and connected to the universal curved pipe 61. The universal curved pipe 61 is used for blowing and dust removal. The pipe joint 64 can blow the gas transmitted by the universal curved pipe 61 onto the battery cell.

[0089] There are many structures of the clamping assembly 2. For example, a mechanical claw structure can be selected to clamp and position the battery cell through the mechanical claw. In this case, the limiter 228 can be arranged on the inner wall of a single mechanical claw to ensure that the battery cell abuts against the limiter 228 when it rises along the mechanical claw. Figure 2 , Figure 5 , Figure 9-12 As shown, the clamping assembly 2 includes a pair of jaws and a jaw power member. The pair of jaws includes a left jaw 221 and a right jaw 222, and the jaw power member is connected to the left jaw 221 and the right jaw 222, and can drive the left jaw 221 and the right jaw 222 to move relatively close to or relatively away from each other to achieve clamping and loosening of the battery cell.

[0090] When the left clamp 221 and the right clamp 222 are close to each other, the shape of the opposing surfaces of the left clamp 221 and the right clamp 222 is adapted to the shape of the battery cell, so as to facilitate centering of the battery cell. In this embodiment, the battery cell is a cylindrical battery cell, so the shape surrounded by the opposing surfaces of the left clamp 221 and the right clamp 222 is a circle. It can be understood that the shape of the battery cell is different, and the shape of the opposing surfaces of the left clamp 221 and the right clamp 222 will also be changed accordingly.

[0091] At this time, the opposing surfaces of the left clamping jaw 221 and the right clamping jaw 222 define an ascending path of the battery cell. In order to achieve the abutment of the limiting member 228 against the ascending battery cell, the limiting member 228 can be fixed on the opposing surfaces of the battery cell.

[0092] like Fig. 9 and Fig.10 As shown, it is a structural schematic diagram and a front view of the clamping jaw assembly 22 of the collector plate welding station. At this time, the limiter 228 is a pressure cover fixedly covered on the clamping jaw. The pressure cover has a protrusion 241 protruding from the edge of the opposite surface of a pair of clamping jaws, so that the protrusion 241 is located on the ascending path of the battery cell and can abut against the battery cell after it rises to a certain height.

[0093] It should be noted that, in this embodiment, both the left clamping jaw 221 and the right clamping jaw 222 are provided with a pressure cover. In another embodiment, a pressure cover may be provided on either the left clamping jaw 221 or the right clamping jaw 222. Fig.11 , Fig.12 As shown, at the bottom of the shell and the battery core welding station 113, a pressure cover may not be provided on the clamping jaw assembly 22.

[0094] In order to realize the relative movement of a pair of jaws, the jaw assembly 22 includes a jaw bearing 223, a jaw bearing guide shaft 224, a jaw bearing guide shaft fixing seat 225, a fixing bolt 226 and an adjusting bolt 227. The jaw bearing guide shaft 224 is fixedly provided through the left jaw 221 and the right jaw 222. The jaw bearing 223 is located on the left jaw 221 and the right jaw 222 and is fixed on the left jaw 221 and the right jaw 222 by the fixing bolt 226, and the jaw bearing 223 is sleeved on the jaw bearing guide shaft 224. The jaw bearing guide shaft fixing seat 225 is provided between the left jaw 221 and the right jaw 222 and is fixed on the jaw bearing guide shaft 224, so that the left jaw 221 and the right jaw 222 can realize relative movement along the jaw bearing guide shaft 224. The adjusting bolt 227 is disposed on the left clamping jaw 221 , and the opening and closing distance between the left clamping jaw 221 and the right clamping jaw 222 is adjusted by screwing the adjusting bolt 227 , so as to be compatible with current collecting plates and battery cells of different sizes.

[0095] In order to adapt to the different heights of the battery cells, the height of the clamping assembly 2 can also be adjusted. There are many ways to adjust the height of the clamping assembly 2. For example, a driving rail that can be raised and lowered is provided on the bottom plate 11 and the clamping assembly 2 is arranged on the driving rail to achieve the lifting and lowering of the clamping assembly 2. For another example, Figure 7 As shown, it is a schematic diagram of the back structure of the welding station. The clamping assembly 2 adjusts the height of the clamping assembly 2 through the clamping jaw adjusting assembly 23. The clamping jaw adjusting assembly 23 includes a clamping jaw cylinder 231, a clamping jaw cylinder adjusting seat 232, a clamping jaw cylinder fixing seat 233, a clamping jaw adjusting bolt 234, and a clamping jaw fixing seat 235. The clamping jaw cylinder fixing seat 233 is fixed to the vertical plate 12 through a long slot hole, the clamping jaw fixing seat 235 is fixed to the vertical plate 12, the clamping jaw cylinder 231 is fixed to the clamping jaw cylinder fixing seat 233, the clamping jaw cylinder adjusting seat 232 is installed on the clamping jaw cylinder fixing seat 233, and the clamping jaw cylinder adjusting seat 232 and the clamping jaw fixing seat 235 are connected by the clamping jaw adjusting bolt 234. Turning the clamping jaw adjusting bolt 234 can adjust the up and down front and back positions of the clamping jaw cylinder 231, so as to be compatible with batteries of different heights and sizes.

[0096] The bearing assembly 3 is Figure 4The structure shown realizes the lifting movement of the carrying battery cell. The carrying assembly 3 includes a fixed platform 31, a carrying member 32 and a lifting assembly 33. The fixed platform 31 is arranged on the bottom plate 11, the carrying member 32 is placed on the fixed platform 31, and the lifting assembly 33 is arranged at the bottom of the fixed platform 31. The lifting assembly 33 can drive the fixed platform 31 to perform lifting and lowering movements. The carrying member 32 is a support cup with a cylindrical depression formed inside, and the shape of the depression is suitable for positioning the battery cell.

[0097] like Figure 6 and Figure 8 As shown, the lifting assembly 33 includes a lifting cylinder 331, a guide shaft 332 and a lifting bearing 333. The lifting bearing 333 and the lifting cylinder 331 are fixed on both sides of the fixed platform 31. The guide shaft 332 is arranged in the lifting bearing 333. The lifting cylinder 331 drives the fixed platform 31 to perform lifting and lowering movements. In order to prevent the lifting assembly 33 from rising too high, a lifting limiter 334 is fixed on the vertical plate 12 to limit the rising height of the lifting assembly 33.

[0098] In order to eliminate the tolerance caused by the different heights of the battery cells, a height compensation component 5 is also provided on the carrier component 3. Fig.13 and 14 As shown, the height compensation component 5 is fixedly arranged between the fixed platform 31 and the bearing member 32, and the height compensation component 5 includes a height compensation bearing 51, a height compensation bearing mounting seat 52, an elastic member 53, a fixed shaft 54, a limiting disc 55 and a gasket 56. One end of the fixed shaft 54 ​​is fixedly connected to the fixed platform 31, the elastic member 53 is sleeved on the fixed shaft 54 ​​and is arranged together in the height compensation bearing 51, the height compensation bearing 51 is fixed on the height compensation bearing mounting seat 52, and the height compensation bearing mounting seat 52 is fixed on the guide shaft 332. A gasket 56 is arranged between the fixed shaft 54 ​​and the height compensation bearing mounting seat 52 for buffering, and a limiting disc 55 is arranged at the bottom of the height compensation bearing 51 to limit the lifting and lowering of the height compensation bearing 51.

[0099] It should be noted that there are four elastic members 53 located at the four corners of the fixed platform 31. The arrangement of the four elastic members 53 can reduce the tilt of the battery cell when it is placed in the cup or lifted. When the pressing assembly presses the battery cell, the elastic member 53 can not only provide a buffer to prevent the battery cell from being crushed, but also cooperate with the pressing assembly to keep the battery cell upright.

[0100] This embodiment also discloses a positioning method of the positioning mechanism 110, including:

[0101] The battery cell is manually placed on the carrier 32, and the clamping jaw assembly 22 clamps the battery cell and centers it;

[0102] The pressure relief of the clamping cylinder 231 causes the clamping assembly 22 to release the battery cell but maintain the clamping state;

[0103] The supporting assembly 3 lifts the battery cell to a preset height until it contacts the limiting member 228 .

[0104] After the height of the battery cell is positioned, the cylinder drives the clamping jaw assembly 22 to clamp the battery cell again and keep it clamped. The collector plate is placed manually through the guide slot 229, and the pressing block 40 is pressed down to make the collector plate contact with the battery cell, waiting for laser welding.

[0105] like Fig.15 As shown, it is a schematic diagram of the rack assembly 100. The rack assembly 100 includes a rack 101, a laser 102, a chiller 103, a numerical control system 104, a storage box 105, a pedal 106, and a button 107. The rack 101 is connected to the welding mechanism 120. The numerical control system 104 is arranged on the rack 101, connected to the laser 102 to control the laser 102 to emit laser light and control the output power, and is connected to each component and controls the movement of each component. The pedal 106 and the button 107 are fixed to the rack 101 to control the operation of the entire welding device and the start and stop of the laser 102. The chiller 103 is connected to the laser 102 to cool the laser 102 so as to control the temperature of the laser 102. The storage box 105 is used to place workpieces such as battery cells.

[0106] like Fig.16 As shown, it is a schematic diagram of the welding mechanism 120. The welding mechanism 120 includes an optical fiber fixing seat assembly 121, an X-axis screw motion platform 122, a Z-axis screw motion platform 123, a galvanometer 124, an air knife assembly 125, a support frame 126, an X-axis servo motor 127, and a Z-axis servo motor 128. The X-axis screw motion platform 122 and the Z-axis screw motion platform 123 are arranged on the support frame 126, and the galvanometer 124 is movably connected to the X-axis screw motion platform 122 and the Z-axis screw motion platform 123. The air knife assembly 125 is arranged adjacent to the galvanometer 124, and is used to blow away impurities and keep the processing area clean. The X-axis servo motor 127 and the Z-axis servo motor 128 drive the galvanometer 124 to move on the X-axis screw motion platform 122 and the Z-axis screw motion platform 123 respectively. The optical fiber fixing seat assembly 121 is fixed to the support frame 126, and is used to fix and position the optical fiber.

[0107] like Fig.17The figure shows a schematic diagram of an optical fiber fixing seat assembly 121. The optical fiber fixing seat assembly 121 includes an optical fiber line guide sleeve 1211, a fixing seat 1212, a fixing plate 1213, a support rod 1214, an optical fiber fixing shaft 1215, an optical fiber rotating shaft 1216, a seat bearing 1217, a first fixing clamp 1218, a second fixing clamp 1219 and a locking nut 1210. One end of the two support rods 1214 are connected to the support frame 126 through the fixing seat 1212, the two support rods 1214 are connected through the optical fiber fixing shaft 1215, and the two support rods 1214 and the optical fiber fixing shaft 1215 are fixed by the first fixing clamp 1218. A fixing plate 1213 is provided on the optical fiber fixing shaft 1215, and the fixing plate 1213 is fixed to the optical fiber fixing shaft 1215 by a locking nut 1210 and a second fixing clamp 1219. A seat bearing 1217 is provided on the fixing plate 1213, and an optical fiber rotating shaft 1216 is disposed in the seat bearing 1217. An optical fiber line guide sleeve 1211 is provided at the other end of the optical fiber rotating shaft 1216, and the optical fiber line guide sleeve 1211 is used to guide the optical fiber.

[0108] Example 2

[0109] The difference between this embodiment and embodiment 1 is that in this embodiment, the pressing block is driven to be pressed down to a preset height, and at this time, the pressing block has the same function as the limiting member in embodiment 1.

[0110] The positioning method of the positioning mechanism in Example 2 is also different from the positioning method in Example 1, and specifically includes:

[0111] The battery cell is placed manually on the support cup, and the clamping jaw assembly clamps the workpiece and centers it;

[0112] The pressing block is lowered to a preset position on the vertical plate and then remains there;

[0113] The pressure relief of the clamping jaw cylinder causes the clamping jaw to release the battery cell but maintain the clamping state, and the carrying assembly lifts the battery cell to abut against the pressure block.

[0114] Among them, after completing the positioning of the battery cell height, the cylinder clamp clamps the battery cell again and keeps it clamped, the pressure block is lifted to facilitate manual placement of the collector plate, and the pressure block is pressed down again to make the collector plate contact with the battery cell, waiting for laser welding.

[0115] The above is a description of a specific embodiment of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require a specific order or a continuous order to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0116] In summary, after reading this detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure may be presented only by way of example and may not be limiting. Although not explicitly stated herein, those skilled in the art will appreciate that this specification requires various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by this specification and are within the spirit and scope of the exemplary embodiments of this specification.

[0117] In addition, certain terms in this specification have been used to describe embodiments of this specification. For example, "one embodiment", "an embodiment" and / or "some embodiments" mean that a particular feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of this specification. Therefore, it can be emphasized and should be understood that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various parts of this specification do not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics may be appropriately combined in one or more embodiments of this specification.

[0118] It should be understood that in the foregoing description of the embodiments of this specification, in order to help understand a feature and for the purpose of simplifying this specification, this specification combines various features in a single embodiment, drawing or its description. However, this does not mean that the combination of these features is necessary. When reading this specification, it is entirely possible for a person skilled in the art to extract some of the features and understand them as separate embodiments. In other words, the embodiments in this specification can also be understood as the integration of multiple secondary embodiments. This is also true when the content of each secondary embodiment is less than all the features of a single aforementioned disclosed embodiment.

[0119] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, documents, articles, etc., cited herein may be incorporated herein by reference in its entirety for all purposes, except for any prosecution document history related thereto, any equivalent that may be inconsistent or conflicting with this document, or any equivalent prosecution document history that may have a limiting effect on the broadest scope of the claims now or later associated with this document. For example, if there is any inconsistency or conflict between the description, definition, and / or use of a term associated with any of the incorporated materials and the term, description, definition, and / or use associated with this document, the term in this document shall control.

[0120] Finally, it should be understood that the embodiments of the application disclosed herein are explanations of the principles of the embodiments of this specification. Other modified embodiments are also within the scope of this specification. Therefore, the embodiments disclosed in this specification are only used as examples and not as limitations. Those skilled in the art can adopt alternative configurations according to the embodiments in this specification to implement the applications in this specification. Therefore, the embodiments of this specification are not limited to the embodiments accurately described in the application.

Claims

1. A workpiece positioning mechanism, characterized in that: include A support assembly, a clamping assembly, a bearing assembly and a limiting member, wherein the bearing assembly is connected to the support assembly and can perform lifting and lowering movements on the support assembly, the bearing assembly includes a bearing member, and the bearing member is used to bear a workpiece, the clamping assembly is connected to the support assembly and is arranged above the bearing assembly, and the clamping assembly is used to clamp the workpiece; The limiting member can be relatively still with respect to the supporting assembly, and when the bearing assembly drives the workpiece to rise a preset distance, the workpiece abuts against the limiting member.

2. The workpiece positioning mechanism according to claim 1, characterized in that: The limiting member is fixed on the clamping assembly, and when the bearing assembly drives the workpiece to rise, the clamping assembly releases the workpiece to facilitate the workpiece to rise.

3. The workpiece positioning mechanism according to claim 2, characterized in that: The clamping assembly includes a pair of jaws and a jaw power member, the jaw power member is connected to the pair of jaws and is used to drive the pair of jaws to move relatively closer and farther away, the pair of jaws are relatively close to clamp the workpiece, the limit member is fixed on the opposite surface of the jaws, and the limit member can abut against the workpiece.

4. The workpiece positioning mechanism according to claim 3, characterized in that: The limiting member comprises a pressure cover, which is fixed on the pair of clamping jaws. The pressure cover has a protrusion protruding from the edges of the opposite surfaces of the pair of clamping jaws, and the protrusion can abut against the workpiece.

5. The workpiece positioning mechanism according to claim 1, characterized in that: It also includes a clamping assembly, which includes a clamping block. The clamping block is movably arranged on the bearing assembly, and the clamping block can perform lifting movement on the bearing assembly and be fixed at a preset position of the bearing assembly.

6. The workpiece positioning mechanism according to claim 5, characterized in that: The clamping assembly also includes a pressure block fixing seat, a slider mounting seat, a guide rail and a pressure block cylinder, the guide rail is fixed on the support assembly, the slider mounting seat is movably arranged on the guide rail, the pressure block fixing seat is arranged on the slider mounting seat, the pressure block is fixed on the pressure block fixing seat, and the pressure block cylinder is connected to the pressure block fixing seat to drive the pressure block fixing seat to move along the guide rail, thereby driving the pressure block to perform lifting movement on the support assembly.

7. The workpiece positioning mechanism according to any one of claims 1 to 6, characterized in that: The bearing assembly includes a support cup, a fixed platform and a lifting assembly. The fixed platform is arranged on the supporting assembly. The support cup is placed on the fixed platform to position the workpiece. The lifting assembly is arranged at the bottom of the fixed platform. The lifting assembly can drive the fixed platform to perform lifting movements. The lifting assembly includes a lifting cylinder, a guide shaft and a lifting bearing. The lifting bearing and the lifting cylinder are fixed on both sides of the fixed platform. The guide shaft is arranged in the lifting bearing. The lifting cylinder drives the fixed platform to perform lifting movements.

8. The workpiece positioning mechanism according to claim 7, characterized in that: The bearing assembly also includes a height compensation assembly, which is fixed on a fixed platform. The height compensation assembly includes a height compensation bearing, a height compensation bearing mounting seat, an elastic member and a fixed shaft; one end of the fixed shaft is fixedly connected to the fixed platform, the elastic member is sleeved on the fixed shaft and is together arranged in the height compensation bearing, the height compensation bearing is fixed on the height compensation bearing mounting seat, and the height compensation bearing mounting seat is fixed to the guide shaft.

9. A workpiece positioning method, implemented by using the workpiece positioning mechanism according to any one of claims 1 to 8, characterized in that: include: The workpiece is manually placed on the carrier, and the clamping assembly clamps and centers the workpiece; The limiting member is fixed at a preset position; The bearing assembly lifts the workpiece to a predetermined height and then abuts against the limiting member.

10. A welding device, characterized in that: It comprises a workpiece positioning mechanism, a frame and a welding mechanism as described in any one of claims 1 to 8, wherein the workpiece positioning mechanism is arranged on the frame, and the welding mechanism is connected to the frame for welding the workpiece.

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