Positioning device and welding apparatus

Abstract

This application discloses a positioning device and welding equipment, including a base, a clamping module, and a third clamping member. The base has a set distance between its second axis and the base. The clamping module includes a first clamping member and a second clamping member, both mounted on the base. The first and second clamping members are located below the second axis and on opposite sides of it. Both the first and second clamping members support the cylindrical surface of the product. The minimum distances between the first and second clamping members and the second axis are adjustable to ensure the first and second axes of the cylindrical surface coincide. The third clamping member is mounted on the base, located above the second axis, and its minimum distance is also adjustable. The third clamping member is used to clamp the cylindrical surface of the product. This positioning device effectively improves compatibility with cylindrical batteries of different diameters.

Description

Technical Field

[0001] This application relates to the field of cylindrical battery welding technology, and in particular to a positioning device and welding equipment. Background Technology

[0002] With the rapid development of new energy vehicles, reducing production costs has become a development trend. Cylindrical batteries, relying on innovative cell structures and optimized system integration, have effectively reduced battery manufacturing costs. Among them, the 4680 battery has become one of the focal points of market attention since its launch.

[0003] Currently, the end caps and bodies of cylindrical batteries are mostly welded using laser welding. Before welding, the cylindrical battery needs to be positioned so that the first axis of the cylindrical battery coincides with the second axis (the second axis is the rotation axis of the rotating device; when the first axis coincides with the second axis, the radial runout of the cylindrical battery is smaller).

[0004] In related technologies, positioning devices use rollers to support cylindrical batteries, thereby locating the first axis of the cylindrical battery. However, due to unreasonable structural design, the size of the cylindrical batteries that the positioning device can accommodate is relatively limited, resulting in poor compatibility. Utility Model Content

[0005] Therefore, this application proposes a positioning device that has stronger compatibility with cylindrical batteries of different diameters.

[0006] This application also proposes a welding device having the above-mentioned positioning device.

[0007] A positioning device according to a first aspect embodiment of this application is used to position a cylindrical surface of a product, wherein the axis of the cylindrical surface is designated as a first axis, and the positioning device includes:

[0008] The base is provided with a predetermined distance between the second axis and the base.

[0009] The clamping module includes a first clamping member, a second clamping member, and a third clamping member, all of which are mounted on the base. The first, second, and third clamping members are used to clamp or release the cylindrical surface. The triangle formed by the first contact point between the first clamping member and the cylindrical surface, the second contact point between the second clamping member and the cylindrical surface, and the third contact point between the third clamping member and the cylindrical surface is an acute triangle. The minimum distance between the first clamping member and the second axis, the minimum distance between the second clamping member and the second axis, and the minimum distance between the third clamping member and the second axis are all adjustable to ensure that the first axis of the cylindrical surface coincides with the second axis.

[0010] The positioning device according to the embodiments of this application has at least the following beneficial effects: the triangle formed by the first contact point between the first clamping member and the cylindrical surface, the second contact point between the second clamping member and the cylindrical surface, and the third contact point between the third clamping member and the cylindrical surface is an acute triangle, so the cylindrical surface will not be separated from the constraints of the first clamping member, the second clamping member, and the third clamping member, and the first clamping member, the second clamping member, and the third clamping member can complete the positioning of the first axis of the cylindrical surface; the minimum distance between the first clamping member and the second axis, the minimum distance between the second clamping member and the second axis, and the minimum distance between the third clamping member and the second axis are all adjustable, which is beneficial to adjust the first axis to a position that coincides with the second axis; when the diameter of the cylindrical battery changes, by adjusting the minimum distance between the first clamping member and the second axis, the minimum distance between the second clamping member and the second axis, and the minimum distance between the third clamping member and the second axis, the first axis can be made to coincide with the second axis again, so the positioning device has stronger compatibility with cylindrical batteries of different diameters.

[0011] According to some embodiments of this application, the clamping module further includes:

[0012] Mounting bracket, connected to the base;

[0013] A first mounting block is slidably connected to the mounting base, and the sliding direction of the first mounting block relative to the mounting base is defined as a first direction; the first clamping member is mounted on the first mounting block;

[0014] A first screw is threadedly connected to the first mounting block, and the length direction of the first screw is parallel to the first direction. The first screw is rotatably connected to the mounting base.

[0015] According to some embodiments of this application, the clamping module further includes:

[0016] The second mounting block is slidably connected to the mounting base, and the sliding direction of the second mounting block relative to the mounting base is defined as the second direction; the second clamping member is mounted on the second mounting block;

[0017] The second screw is threadedly connected to the second mounting block, and the length direction of the second screw is parallel to the second direction. The second screw is rotatably connected to the mounting base.

[0018] According to some embodiments of this application, the mounting base is slidably connected to the base, and the sliding direction of the mounting base relative to the base is a third direction, which is parallel to the second axis.

[0019] According to some embodiments of this application, a buffer component is also included, the buffer component comprising:

[0020] The first connecting seat is connected to the base;

[0021] The second connecting seat is located on the side of the first connecting seat away from the second axis, and the minimum distance between the second connecting seat and the first connecting seat is adjustable; the third clamping member is installed on the second connecting seat;

[0022] An elastic element is connected to the first connecting seat and the second connecting seat respectively. The elastic element, when deformed, enables the second connecting seat to have a tendency to move closer to the first connecting seat.

[0023] According to some embodiments of this application, the buffer component further includes:

[0024] The third screw is threadedly engaged with the second connecting seat, and one end of the third screw can abut against the first connecting seat to restrict the movement of the second connecting seat toward the first connecting seat;

[0025] Alternatively, the third screw is threaded into the first connecting seat, and one end of the third screw can abut against the second connecting seat to restrict the movement of the second connecting seat toward the first connecting seat.

[0026] According to some embodiments of this application, the elastic element is compressible, and the buffer assembly further includes:

[0027] A guide rod is slidably connected to the first connecting seat, and one end of the guide rod is connected to the second connecting seat; an elastic element is sleeved on the guide rod, and one end of the elastic element abuts against the first connecting seat;

[0028] The first connecting block is connected to the other end of the guide rod, and the other end of the elastic member abuts against the first connecting block; the third clamping member is installed on the first connecting block.

[0029] According to some embodiments of this application, the first clamping member includes a first roller, the second clamping member includes a second roller, and the third clamping member includes a third roller.

[0030] According to some embodiments of this application, it also includes:

[0031] A drive assembly is used to drive the third clamping member closer to the second axis so that the third clamping member presses against the cylindrical surface; the drive assembly is also used to drive the third clamping member away from the second axis.

[0032] The welding apparatus according to a second aspect embodiment of this application includes:

[0033] The aforementioned positioning device;

[0034] A welding device for welding the product in which the first shaft center and the second shaft center coincide.

[0035] The welding equipment according to the embodiments of this application has at least the following beneficial effects: by using the above-described positioning device, the positioning device has a stronger compatibility with cylindrical batteries of different diameters, thereby making the welding equipment more compatible.

[0036] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0037] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0038] Figure 1 A perspective view of a positioning device according to an embodiment of this application;

[0039] Figure 2 This is a schematic diagram of the first clamping element, the second clamping element, and the third clamping element clamping the cylindrical surface;

[0040] Figure 3 This is a schematic diagram of the first clamping component, the third clamping component, and the cylindrical battery.

[0041] Figure 4 for Figure 1 Exploded view of the clamping module of the positioning device;

[0042] Figure 5 for Figure 1 A perspective view of the buffer assembly of the positioning device;

[0043] Figure 6 This is a schematic diagram of the buffer assembly of the positioning device according to another embodiment of this application;

[0044] Figure 7 A schematic diagram of the buffer assembly of the positioning device according to another embodiment of this application;

[0045] Figure 8 This is a schematic diagram of a welding apparatus according to an embodiment of this application.

[0046] Reference numeral: Third clamping element 110;

[0047] Buffer assembly 300, first connecting block 310, elastic element 330, guide rod 340, second connecting seat 350, third screw 360, first linear bearing 370, first connecting seat 380, tension spring 391, first bolt 392;

[0048] Product 410, cylindrical surface 411, first axis 412, cylindrical battery 413, welding device 420;

[0049] Base 510, second shaft 520, drive assembly 530, plane 540;

[0050] Clamping module 600, sliding assembly 610, guide rail 611, slider 612, mounting base 620, first screw 631, first limiting block 632, first mounting block 633, first clamping member 634, limiting groove 635, limiting ring 636, second screw 641, second mounting block 642, second clamping member 643. Detailed Implementation

[0051] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0052] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0053] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number, and "above," "below," "within," etc., are understood to exclude the stated number. If "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0054] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0055] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] It should be noted that in the embodiments of this application, product 410 is specifically a cylindrical battery 413. However, product 410 is not limited to this; for example, product 410 can also be a connector, a cylindrical container, etc.

[0057] Reference Figures 1 to 3 According to a first aspect embodiment of this application, a positioning device is used to position the cylindrical surface 411 of a cylindrical battery 413. The axis of the cylindrical surface 411 is designated as a first axis 412. The positioning device includes a base 510 and a clamping module 600. The distance between a second axis 520 and the base 510 is designated as a set distance. The clamping module 600 includes a first clamping member 634, a second clamping member 643, and a third clamping member 110, all of which are mounted on the base 510. The first clamping member 634, the second clamping member 643, and the third clamping member 110 are used to clamp or release the cylindrical surface 411. The triangle formed by the first contact point 651 between the first clamping member 634 and the cylindrical surface 411, the second contact point 652 between the second clamping member 643 and the cylindrical surface 411, and the third contact point 653 between the third clamping member 110 and the cylindrical surface 411 is an acute triangle. The minimum distance between the first clamping member 634 and the second axis 520, the minimum distance between the second clamping member 643 and the second axis 520, and the minimum distance between the third clamping member 110 and the second axis 520 are all adjustable so that the first axis 412 of the cylindrical surface 411 coincides with the second axis 520.

[0058] The positioning device according to the embodiments of this application has at least the following beneficial effects: the triangle formed by the first contact point 651 between the first clamping member 634 and the cylindrical surface 411, the second contact point 652 between the second clamping member 643 and the cylindrical surface 411, and the third contact point 653 between the third clamping member 110 and the cylindrical surface 411 is an acute triangle, thereby the cylindrical surface 411 will not be separated from the constraints of the first clamping member 634, the second clamping member 643, and the third clamping member 110, and the first clamping member 634, the second clamping member 643, and the third clamping member 110 can complete the positioning of the first axis 412 of the cylindrical surface 411; the minimum distance between the first clamping member 634 and the second axis 520 The minimum distance between the second clamping member 643 and the second axis 520, and the minimum distance between the third clamping member 110 and the second axis 520 are all adjustable, which helps to adjust the first axis 412 to a position that coincides with the second axis 520. When the diameter of the cylindrical battery 413 changes, by adjusting the minimum distance between the first clamping member 634 and the second axis 520, the minimum distance between the second clamping member 643 and the second axis 520, and the minimum distance between the third clamping member 110 and the second axis 520, the first axis 412 can be realigned with the second axis 520. Therefore, the positioning device has a stronger compatibility with cylindrical batteries 413 of different diameters.

[0059] It should be noted that the cylindrical battery 413 needs to be rotated when welding the end cap to the cylinder body to form a circular weld. The rotating device drives the cylindrical battery 413 to rotate, and the second axis 520 is the rotation axis of the rotating device. The distance between the second axis 520 and the base 510 is usually fixed. The positioning device needs to cooperate with the rotating device to assist in completing the welding of the cylindrical battery 413.

[0060] It should be noted that when the triangle formed by the first contact point 651, the second contact point 652, and the third contact point 653 is a right-angled triangle or an obtuse-angled triangle, the cylindrical battery 413 can detach from the first clamping member 634, the second clamping member 643, and the third clamping member 110, and the first clamping member 634, the second clamping member 643, and the third clamping member 110 will not have a clamping effect.

[0061] Specifically, to ensure that the triangle formed by the first contact point 651, the second contact point 652, and the third contact point 653 is an acute triangle, the first clamping member 634 and the second clamping member 643 can be located below the second axis 520, and the first clamping member 634 and the second clamping member 643 are respectively located on opposite sides of the second axis 520 (see reference). Figure 1 For example, the first clamping member 634 is located on the right side of the second shaft 520, the second clamping member 643 is located on the left side of the second shaft 520, and the third clamping member 110 is located above the second shaft 520.

[0062] It should be noted that the minimum distance between the first clamping member 634 and the second axis 520 is adjustable. This minimum distance is because there is a possibility that the first clamping member 634 releases the cylindrical battery 413. In this case, certain driving devices (such as linear motors or cylinders) will drive the first clamping member 634 away from the second axis 520, and when the first clamping member 634 moves back towards the second axis 520, the distance between the first clamping member 634 and the second axis 520 is at its minimum. The minimum distances between the second clamping member 643 and the second axis 520, and between the third clamping member 110 and the second axis 520, are similar.

[0063] Reference Figure 4 In some embodiments of this application, the clamping module 600 further includes a mounting base 620, a first mounting block 633, and a first screw 631. The mounting base 620 is connected to the base 510. The first mounting block 633 is slidably connected to the mounting base 620, and the sliding direction of the first mounting block 633 relative to the mounting base 620 is defined as a first direction. A first clamping member 634 is mounted on the first mounting block 633. The first screw 631 is threadedly connected to the first mounting block 633, and the length direction of the first screw 631 is parallel to the first direction. The first screw 631 is rotatably connected to the mounting base 620.

[0064] Therefore, by rotating the first screw 631, the minimum distance between the first clamping member 634 and the second shaft 520 can be adjusted.

[0065] It should be noted that after the position of the first clamping member 634 is adjusted into place, the first clamping member 634 can be fixed to the mounting base 620 by fasteners, thereby reducing the probability that the first clamping member 634 will slide relative to the mounting base 620 during operation.

[0066] Specifically, the clamping module 600 also includes a first limiting block 632, which is fixed to the mounting base 620 by fasteners (bolts, studs, etc.). The first limiting block 632 has a limiting groove 635, and the first screw 631 has a limiting ring 636. The first screw 631 is placed in the limiting groove 635, with the head of the first screw 631 and the limiting ring 636 located on opposite sides of the first limiting block 632. Thus, the first screw 631 can be rotatably connected to the mounting base 620.

[0067] Specifically, the angle between the first direction and the horizontal plane can be 0 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, or other angles.

[0068] In another embodiment, the first mounting block 633 remains slidably connected to the mounting base 620. The mounting base 620 has a plurality of first threaded holes spaced apart along a first direction, while the first mounting block 633 has a first oblong hole. After the first bolt passes through the first oblong hole, it engages with a certain first threaded hole.

[0069] When it is necessary to adjust the minimum distance between the first clamping member 634 and the second shaft 520, the first mounting block 633 is moved to the target position by loosening the first bolt, and then the first bolt is threaded into another first threaded hole, so that the minimum distance between the first clamping member 634 and the second shaft 520 can be adjusted.

[0070] Reference Figure 4 In some embodiments of this application, the clamping module 600 further includes a second screw 641 and a second mounting block 642. The second mounting block 642 is slidably connected to the mounting base 620, and the sliding direction of the second mounting block 642 relative to the mounting base 620 is defined as a second direction. A second clamping member 643 is mounted on the second mounting block 642. The second screw 641 is threadedly connected to the second mounting block 642, and the length direction of the second screw 641 is parallel to the second direction. The second screw 641 is rotatably connected to the mounting base 620.

[0071] Therefore, by rotating the second screw 641, the minimum distance between the second clamping member 643 and the second shaft 520 can be adjusted.

[0072] Specifically, the structure in which the second screw 641 is rotatably connected to the mounting base 620 can be referred to the structure in which the first screw 631 is rotatably connected to the mounting base 620, and will not be described again here.

[0073] Specifically, the angle between the second direction and the horizontal plane can be 0 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees or other angles.

[0074] In another embodiment, the second mounting block 642 remains slidably connected to the mounting base 620. The mounting base 620 has a plurality of second threaded holes spaced apart along the second direction, while the second mounting block 642 has a second oblong hole. The second bolt passes through the second oblong hole and engages with a threaded connection to one of the second threaded holes.

[0075] When it is necessary to adjust the minimum distance between the second clamping member 643 and the second shaft 520, the second mounting block 642 is moved to the target position by loosening the second bolt, and then the second bolt is threaded into another second threaded hole to achieve the minimum distance adjustment between the second clamping member 643 and the second shaft 520.

[0076] Reference Figure 4In some embodiments of this application, the mounting base 620 is slidably connected to the base 510, and the sliding direction of the mounting base 620 relative to the base 510 is a third direction, which is parallel to the second axis 520.

[0077] By sliding the mounting base 620 relative to the base 510, the positions of the first clamping member 634 and the second clamping member 643 can be adjusted, thereby supporting the cylindrical battery 413 at different axial positions. Thus, the positioning device can provide good positioning support for the cylindrical battery 413.

[0078] Specifically, the clamping module 600 also includes a sliding assembly 610, which includes a guide rail 611 and a slider 612, which are slidably connected. The guide rail 611 is positioned along a third direction along its length and is fixed to the base 510 by fasteners. The slider 612 is fixed to the mounting base 620 by fasteners. Thus, the mounting base 620 and the base 510 can be slidably connected.

[0079] Reference Figure 5 In some embodiments of this application, the positioning device further includes a buffer assembly 300, which includes a first connecting seat 380, a second connecting seat 350, and an elastic member 330. The first connecting seat 380 is connected to the base 510. The second connecting seat 350 is located on the side of the first connecting seat 380 away from the second axis 520, and the minimum distance between the second connecting seat 350 and the first connecting seat 380 is adjustable. A third clamping member 110 is mounted on the second connecting seat 350.

[0080] The elastic element 330 is connected to the first connecting seat 380 and the second connecting seat 350 respectively. The deformed elastic element 330 can make the second connecting seat 350 have a tendency to move closer to the first connecting seat 380.

[0081] The minimum distance between the second connecting seat 350 and the first connecting seat 380 can be adjusted, and the deformable elastic element 330 can make the second connecting seat 350 tend to move closer to the first connecting seat 380, thereby the distance between the second connecting seat 350 and the first connecting seat 380 can be adjusted.

[0082] The first connecting seat 380 is connected to the base 510, and the third clamping member 110 is installed on the second connecting seat 350, thereby adjusting the minimum distance between the third clamping member 110 and the second shaft 520.

[0083] Furthermore, when the third clamping member 110 clamps the cylindrical battery 413, the third clamping member 110 is lifted up, and the elastic member 330 undergoes elastic deformation. The elastically deformed elastic member 330 drives the second connecting seat 350 to be close to the first connecting seat 380. The second connecting seat 350 is located on the side of the first connecting seat 380 away from the second axis 520. The third clamping member 110 is installed on the second connecting seat 350, thereby bringing the third clamping member 110 closer to the second axis 520. The third clamping member 110 can continuously clamp the cylindrical battery 413.

[0084] Reference Figure 5 In some embodiments of this application, the buffer assembly 300 further includes a third screw 360, which is threadedly engaged with the second connecting seat 350. One end of the third screw 360 (refer to...) Figure 5 (For example, the lower end) can abut against the first connecting seat 380 to restrict the movement of the second connecting seat 350 toward the first connecting seat 380.

[0085] Therefore, by rotating the third screw 360 relative to the second connecting seat 350, the minimum distance between the first connecting seat 380 and the second connecting seat 350 can be adjusted. The structure is simple and easy to use.

[0086] Reference Figure 6 In another embodiment, the third screw 360 is threadedly engaged with the first connecting seat 380, and one end of the third screw 360 can abut against the second connecting seat 350 to restrict the movement of the second connecting seat 350 toward the first connecting seat 380.

[0087] Therefore, by rotating the third screw 360 relative to the first connecting seat 380, the minimum distance between the first connecting seat 380 and the second connecting seat 350 can be adjusted. The structure is simple and easy to use.

[0088] Reference Figure 5 In the improved embodiment described above, the elastic element 330 is compressible, and the buffer assembly 300 further includes a first connecting block 310 and a guide rod 340. The guide rod 340 is slidably connected to the first connecting seat 380, and one end of the guide rod 340 (refer to...) Figure 5 (e.g., the upper end) is connected to the second connecting seat 350. The elastic element 330 is sleeved on the guide rod 340, and one end of the elastic element 330 (refer to...) Figure 5 (e.g., the upper end) abuts against the first connecting seat 380.

[0089] The first connecting block 310 and the other end of the guide rod 340 (refer to) Figure 5 (e.g., the lower end) is connected, and the other end of the elastic element 330 (refer to) Figure 5 (e.g., the lower end) abuts against the first connecting block 310. The third clamping member 110 is installed on the first connecting block 310.

[0090] Therefore, when the elastic element 330 is compressed, it can push the second connecting seat 350 closer to the first connecting block 310. The structure is simple, easy to use, and reliable.

[0091] Specifically, the elastic element 330 can be selected from one of the following: a compression spring, a bellows, or a rubber ring.

[0092] Specifically, refer to Figure 5 The buffer assembly 300 also includes a first linear bearing 370, which is fixed to the first connecting seat 380 by fasteners. A guide rod 340 is inserted into the first linear bearing 370, thereby realizing a sliding connection between the guide rod 340 and the first connecting seat 380.

[0093] The lower end of the guide rod 340 is fixed to the first connecting block 310 by fasteners, and the upper end of the guide rod 340 is fixedly connected to the second connecting seat 350 by fasteners.

[0094] To ensure force balance in the second connecting seat 350, two elastic elements 330, two guide rods 340, and two first linear bearings 370 are provided. The two guide rods 340 are respectively inserted into the two first linear bearings 370. The upper ends of the two guide rods 340 are fixed to the second connecting seat 350, and the lower ends of the two guide rods 340 are fixed to the first connecting block 310. One elastic element 330 is fitted onto each guide rod 340.

[0095] In another embodiment, refer to Figure 8 Alternatively, the elastic element 330 can be a tension spring 391, with its upper end attached to the second connecting seat 350 and its lower end attached to the first connecting seat 380. Initially, the tension spring 391 is in a stretched state. Thus, the deformed elastic element 330 allows the second connecting seat 350 to tend to move closer to the first connecting seat 380.

[0096] Furthermore, to adjust the initial deformation of the tension spring 391, a first bolt 392 can be added. The first bolt 392 is threaded into the second connecting seat 350, and the upper end of the tension spring 391 is hung on the first bolt 392. The initial deformation of the tension spring 391 can be adjusted by rotating the first bolt 392.

[0097] Reference Figure 1 In some embodiments of this application, the first clamping member 634 includes a first roller, the second clamping member 643 includes a second roller, and the third clamping member 110 includes a third roller.

[0098] When the first roller contacts the cylindrical battery 413, it will rotate with the cylindrical battery 413. The friction between the first roller and the cylindrical battery 413 is rolling friction, which is small and thus helps to protect the cylindrical surface 411 of the cylindrical battery 413. The second and third rollers work in the same way.

[0099] In another embodiment, the first clamping member may also be a support block or an arc-shaped rubber pad, the second clamping member may also be a support block or an arc-shaped rubber pad, and the third clamping member 110 may also be a pressure block or an arc-shaped rubber pad.

[0100] Reference Figure 1 In some embodiments of this application, the positioning device further includes a drive assembly 530, which is used to drive the third clamping member 110 closer to the second axis 520 so that the third clamping member 110 presses against the cylindrical surface 411. The drive assembly 530 is also used to drive the third clamping member 110 away from the second axis 520.

[0101] By setting the drive component 530, the third clamping member 110 can avoid the cylindrical battery 413 when it is being fed, making the feeding process safer and more convenient.

[0102] Specifically, the drive assembly 530 may be one of the following: a cylinder, a linear motor, a hydraulic cylinder, an electric cylinder, a motor-driven gear and rack mechanism, a motor-driven sprocket and chain mechanism, a motor-driven synchronous pulley and synchronous belt mechanism, and a motor-driven crank and slider mechanism.

[0103] Reference Figure 8 The welding apparatus according to the second aspect of this application includes a positioning device and a welding device 420, the welding device 420 being used to weld a cylindrical battery 413 whose first axis 412 coincides with a second axis 520.

[0104] The welding equipment according to the embodiments of this application has at least the following beneficial effects: by using the above-described positioning device, the positioning device has a stronger compatibility with cylindrical batteries 413 of different diameters, thereby making the welding equipment more compatible.

[0105] Specifically, the welding device 420 can be a laser welding device, a plasma welding device, or a laser welding device, etc.

[0106] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A positioning device for positioning a cylindrical surface of a product, provided with a first axis of the cylindrical surface, characterized in that, The positioning device includes: The base is provided with a predetermined distance between the second axis and the base. The clamping module includes a first clamping member, a second clamping member, and a third clamping member, all of which are mounted on the base. The first, second, and third clamping members are used to clamp or release the cylindrical surface. The triangle formed by the first contact point between the first clamping member and the cylindrical surface, the second contact point between the second clamping member and the cylindrical surface, and the third contact point between the third clamping member and the cylindrical surface is an acute triangle. The minimum distance between the first clamping member and the second axis, the minimum distance between the second clamping member and the second axis, and the minimum distance between the third clamping member and the second axis are all adjustable to ensure that the first axis of the cylindrical surface coincides with the second axis.

2. The positioning device of claim 1, wherein, The clamping module also includes: Mounting bracket, connected to the base; A first mounting block is slidably connected to the mounting base, and the sliding direction of the first mounting block relative to the mounting base is defined as a first direction; the first clamping member is mounted on the first mounting block; A first screw is threadedly connected to the first mounting block, and the length direction of the first screw is parallel to the first direction. The first screw is rotatably connected to the mounting base.

3. The positioning device of claim 2, wherein, The clamping module also includes: The second mounting block is slidably connected to the mounting base, and the sliding direction of the second mounting block relative to the mounting base is defined as the second direction; the second clamping member is mounted on the second mounting block; The second screw is threadedly connected to the second mounting block, and the length direction of the second screw is parallel to the second direction. The second screw is rotatably connected to the mounting base.

4. The positioning device of claim 2, wherein, The mounting base is slidably connected to the base. The sliding direction of the mounting base relative to the base is a third direction, which is parallel to the second axis.

5. The positioning device of claim 1, wherein, It also includes a buffer component, the buffer component comprising: The first connecting seat is connected to the base; The second connecting seat is located on the side of the first connecting seat away from the second axis, and the minimum distance between the second connecting seat and the first connecting seat is adjustable; the third clamping member is installed on the second connecting seat; An elastic element is connected to the first connecting seat and the second connecting seat respectively. The elastic element, when deformed, enables the second connecting seat to have a tendency to move closer to the first connecting seat.

6. The positioning device of claim 5, wherein, The buffer component also includes: The third screw is threadedly engaged with the second connecting seat, and one end of the third screw can abut against the first connecting seat to restrict the movement of the second connecting seat toward the first connecting seat; Alternatively, the third screw is threaded into the first connecting seat, and one end of the third screw can abut against the second connecting seat to restrict the movement of the second connecting seat toward the first connecting seat.

7. The positioning device of claim 5, wherein, The elastic element is compressible, and the buffer assembly further includes: A guide rod is slidably connected to the first connecting seat, and one end of the guide rod is connected to the second connecting seat; an elastic element is sleeved on the guide rod, and one end of the elastic element abuts against the first connecting seat; The first connecting block is connected to the other end of the guide rod, and the other end of the elastic member abuts against the first connecting block; the third clamping member is installed on the first connecting block.

8. The positioning device of claim 1, wherein, The first clamping member includes a first roller, the second clamping member includes a second roller, and the third clamping member includes a third roller.

9. The positioning device of claim 1, wherein, Also includes: A drive assembly is used to drive the third clamping member closer to the second axis so that the third clamping member presses against the cylindrical surface; the drive assembly is also used to drive the third clamping member away from the second axis.

10. Welding apparatus, characterized in that include: The positioning device according to any one of claims 1 to 9; A welding device for welding the product in which the first shaft center and the second shaft center coincide.

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