Riveting device

Abstract

The application provides a riveting device suitable for riveting workpieces. The riveting device comprises a base frame, a positioning and bearing mechanism, a vertical driving mechanism, a first lifting plate, a pre-pressing positioning mechanism and a riveting head. The positioning and bearing mechanism is arranged on the base frame, and the workpieces to be riveted are positioned and borne on the positioning and bearing mechanism. The first lifting plate is arranged on the base frame and moves vertically, the vertical driving mechanism is vertically arranged on the base frame, and the first lifting plate is fixedly connected to the driving end of the vertical driving mechanism. The pre-pressing positioning mechanism is arranged at the bottom of the first lifting plate, and the riveting head is vertically fixed at the bottom of the first lifting plate. The pre-pressing positioning mechanism and the riveting head are both located above the positioning and bearing mechanism. The riveting device has the advantages of simple structure, simple and fast processing, high efficiency and stable riveting quality.

Description

Technical Field

[0001] This application relates to the technical field of riveting equipment, and more particularly to a riveting device. Background Technology

[0002] As a crucial structural component of lithium batteries, the production volume of lithium battery covers is increasing rapidly with the development of electric vehicles. Consequently, the production efficiency and quality of lithium battery covers directly impact lithium battery production. Among these, riveting equipment, a key automated production line for lithium battery cover assembly, will continue to see rising demand and increasingly widespread application.

[0003] In the existing technology, the lithium battery cover structure is composed of a plain aluminum plate, an explosion-proof sheet, a lower plastic, a plastic-coated aluminum part, a pressure ring, a sealing ring, a positive electrode post, and a negative electrode post. Rivets are inserted into the holes in these parts that mate with them. Pressure is used to force the pointed tip of the rivet into the rivet head until the rivet pressing surface is flush with the pressure plate, making the rivet cylindrical thicker and its head expand, thereby fastening all the parts together.

[0004] However, existing riveting equipment has an extremely complex structure, cumbersome processing, and extremely low efficiency. Furthermore, during the riveting process, gaps, cracks, and weak joints easily appear between the riveted parts in the finished lithium battery cover, leading to electrolyte leakage due to inadequate sealing. This results in unstable overall riveting quality and severely impacts the yield rate of the riveting process. Consequently, it is difficult to meet the demands of high-quality, high-efficiency production.

[0005] Therefore, there is an urgent need for a riveting device to overcome the aforementioned problems. Summary of the Invention

[0006] The purpose of this application is to provide a riveting device that has the advantages of simple structure, simple and quick processing, high efficiency and stable riveting quality.

[0007] To achieve the above objectives, a first aspect of this application provides a riveting device suitable for riveting workpieces, wherein the riveting device includes: a base frame, a positioning and bearing mechanism, a vertical drive mechanism, a first lifting plate, a pre-pressing and positioning mechanism, and a riveting head.

[0008] The positioning and bearing mechanism is mounted on the base frame, and the workpiece to be riveted and pressed is supported and positioned on the positioning and bearing mechanism.

[0009] The first lifting plate is vertically movable on the base frame, the vertical drive mechanism is vertically mounted on the base frame, and the first lifting plate is fixedly connected to the drive end of the vertical drive mechanism;

[0010] The pre-pressure positioning mechanism is located at the bottom of the first lifting plate, and the riveting head is vertically fixed at the bottom of the first lifting plate. Both the pre-pressure positioning mechanism and the riveting head are located above the positioning bearing mechanism.

[0011] Optionally, the positioning and bearing mechanism includes: a mounting frame, a first positioning component, a second positioning component, and a third positioning component. The mounting frame is fixed on the base frame. The first positioning component, the second positioning component, and the third positioning component are all disposed on the mounting frame. The first positioning component is positioned along a horizontal X-axis direction and abuts against one side of the workpiece. The second positioning component is positioned along the X-axis direction and abuts against the side of the workpiece away from the first positioning component. The third positioning component is clamped and positioned along a horizontal Y-axis direction on opposite sides of the workpiece. The X-axis is horizontal and perpendicular to the Y-axis.

[0012] Optionally, the first positioning component includes: a first linear driver, a first lifting seat, a second linear driver, and a first positioning member. The first linear driver is vertically fixed on the mounting frame, and the first lifting seat is vertically movably disposed on the mounting frame. The first lifting seat is fixedly connected to the driving end of the first linear driver. The second linear driver is fixed on the first lifting seat along the X-axis direction, and the first positioning member is fixed to the driving end of the second linear driver. The first positioning member has a first positioning portion formed on the side facing the second positioning component along the X-axis direction.

[0013] Optionally, the second positioning component includes: a third linear actuator and a second positioning member. The third linear actuator is fixed to the mounting bracket along the X-axis direction, and the second positioning member is fixed to the driving end of the third linear actuator. The second positioning member has a second positioning portion formed on one side of the second positioning member along the X-axis direction facing the first positioning member. The first positioning portion and the second positioning portion are positioned relative to each other along the X-axis direction and abut against the opposite sides of the workpiece.

[0014] Optionally, the top of the first positioning member is formed with a first bearing portion for bearing the workpiece, the top of the second positioning member is formed with a second bearing portion for bearing the workpiece, and a third positioning portion is also formed on the second bearing portion.

[0015] Optionally, the third positioning component includes: a fourth linear actuator, an opening / closing actuator, a first positioning clamping arm, and a second positioning clamping arm. The fourth linear actuator is vertically fixed to the mounting bracket, and the opening / closing actuator is horizontally fixed to the driving end of the fourth linear actuator, with the opening / closing direction of the opening / closing actuator arranged along the Y-axis direction. The first positioning clamping arm is fixedly connected to one driving end of the opening / closing actuator, and the second positioning clamping arm is fixedly connected to the other driving end of the opening / closing actuator. The first positioning clamping arm and the second positioning clamping arm are positioned relative to each other along the Y-axis direction, abutting against opposite sides of the workpiece.

[0016] Optionally, the pre-pressing positioning mechanism includes: a second lifting plate, a third positioning member, and a plurality of first elastic members. The second lifting plate is vertically movably disposed at the bottom of the first lifting plate. The first elastic members are all abutted between the first lifting plate and the second lifting plate. The first elastic members constantly drive the second lifting plate to move vertically downward, and the first elastic members are distributed horizontally at intervals. The third positioning member is fixed to the bottom of the second lifting plate, and a fourth positioning part is formed at the bottom of the third positioning member. The fourth positioning part is positioned and abuts against the top of the workpiece.

[0017] Optionally, a first clearance through hole is formed on the second lifting plate, and a second clearance through hole is formed on the third positioning member. The second clearance through hole is vertically connected to the first clearance through hole, and the riveting head passes vertically through the first clearance through hole and the second clearance through hole with gaps.

[0018] Optionally, the pre-compression positioning mechanism further includes: a plurality of limiting blocks, all of which are fixed to the bottom of the first lifting plate, and the second lifting plate is detachably abutting against the bottom of the limiting blocks.

[0019] Optionally, the riveting device further includes: a plurality of first guide posts and a first linear bearing corresponding to each of the first guide posts. The first guide posts are all vertically fixedly connected to the mounting frame. The first linear bearings are fixedly mounted on the first lifting plate. The first linear bearings are slidably sleeved on the corresponding first guide posts.

[0020] The pre-compression positioning mechanism further includes: a plurality of limiting and guiding components, the limiting and guiding components including: a blocking plate, a plurality of second guide posts and a second linear bearing corresponding to each of the second guide posts, the second linear bearings being fixedly mounted on the first lifting plate, the top ends of the second guide posts being fixedly connected to the blocking plate, the lower ends of the second guide posts being fixedly connected to the second lifting plate, and the first lifting plate being located between the blocking plate and the second lifting plate.

[0021] Because the positioning and bearing mechanism of the riveting device in this application is located on the base frame, the workpiece to be riveted is positioned on the positioning and bearing mechanism; the first lifting plate is vertically movable on the base frame, the vertical drive mechanism is vertically mounted on the base frame, and the first lifting plate is fixedly connected to the drive end of the vertical drive mechanism; the pre-pressing positioning mechanism is located at the bottom of the first lifting plate, and the riveting head is vertically fixed at the bottom of the first lifting plate, with both the pre-pressing positioning mechanism and the riveting head located above the positioning and bearing mechanism. Thus, the workpiece to be riveted is positioned on the positioning and bearing mechanism, and then the vertical drive mechanism drives the first lifting plate to move vertically downwards. When the pre-pressing positioning mechanism pre-presses and positions the workpiece at the top, the vertical drive mechanism continues to drive the first lifting plate to move vertically downwards until the riveting head rivets onto the corresponding riveting position on the workpiece, completing the riveting process. This not only simplifies the structure but also makes the processing simpler and faster, greatly improving efficiency. Furthermore, by pre-pressing and positioning the workpiece at the top using a pre-pressing positioning mechanism, and then performing the riveting process by the riveting head, the workpiece is prevented from loosening or shifting during the riveting process. This ensures that there are no gaps, riveting cracks, or weak riveting joints between the riveted parts of the workpiece, and guarantees a tight seal between the various parts of the riveted workpiece to prevent leakage. This results in stable overall riveting quality and significantly improves the pass rate of riveting. It can better meet the needs of high-quality and high-efficiency production and processing. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of one embodiment of the riveting device in this application.

[0023] Figure 2 for Figure 1 The main view.

[0024] Figure 3 This is a three-dimensional schematic diagram of the positioning and bearing mechanism of one embodiment of the riveting device in this application.

[0025] Figure 4 for Figure 3 A schematic diagram from another perspective.

[0026] Figure 5 This is a three-dimensional schematic diagram of the pre-pressure positioning mechanism, the first lifting plate, the first guide column, the first linear bearing, and the second elastic element in one embodiment of the riveting device in this application.

[0027] Figure 6 for Figure 5 The main view. Detailed Implementation

[0028] The present application will be further described below with reference to the accompanying drawings and preferred embodiments, but the implementation of the present application is not limited thereto.

[0029] Please see Figures 1 to 6 The riveting device 100 of this application is suitable for riveting workpieces (not shown in the figure). The riveting device 100 includes: a base frame 10, a positioning and bearing mechanism 20, a vertical drive mechanism 30, a first lifting plate 40, a pre-pressing and positioning mechanism 50, and a riveting head 60. The positioning and bearing mechanism 20 is mounted on the base frame 10, and the workpiece to be riveted is positioned on the positioning and bearing mechanism 20, thus achieving the positioning and bearing of the workpiece to be riveted. The first lifting plate 40 is vertically movable on the base frame 10, and the vertical drive mechanism 30 is vertically mounted on the base frame 10. The first lifting plate 40 is fixedly connected to the drive end of the vertical drive mechanism 30. In this embodiment, the vertical drive mechanism 30 can be selected as a pressure cylinder, but is not limited thereto. The first lifting plate 40 is driven vertically up and down by the vertical drive mechanism 30. A pre-press positioning mechanism 50 is located at the bottom of the first lifting plate 40, and a riveting head 60 is vertically fixed to the bottom of the first lifting plate 40. Both the pre-press positioning mechanism 50 and the riveting head 60 are located above the positioning bearing mechanism 20, allowing them to move up and down synchronously with the first lifting plate 40. The workpiece to be riveted is positioned on the positioning bearing mechanism 20, and then the vertical drive mechanism 30 drives the first lifting plate 40 to move vertically downwards. When the pre-press positioning mechanism 50 is pre-pressed and positioned at the top of the workpiece, the vertical drive mechanism 30 continues to drive the first lifting plate 40 to move vertically downwards until the riveting head 60 rivets onto the corresponding riveting position on the workpiece, completing the riveting process. This not only simplifies the structure but also makes the processing simpler and faster, greatly improving efficiency. Furthermore, the pre-pressing positioning mechanism 50 pre-positions the workpiece at the top before the riveting head 60 performs the riveting process. This prevents the workpiece from loosening or shifting during riveting, ensuring that there are no gaps, riveting cracks, or weak riveting joints between the riveted parts. It also ensures a tight seal between the riveted parts, preventing leakage and resulting in stable overall riveting quality, significantly improving the riveting pass rate. This better meets the demands of high-quality, high-efficiency production. Specifically, as follows:

[0030] Please see Figure 3 and Figure 4The positioning and bearing mechanism 20 includes a mounting frame 21, a first positioning component 22, a second positioning component 23, and a third positioning component 24. The mounting frame 21 is fixed to the base frame 10. The first positioning component 22, the second positioning component 23, and the third positioning component 24 are all mounted on the mounting frame 21. The first positioning component 22 is positioned along a horizontal X-axis direction, contacting one side of the workpiece. The second positioning component 23 is positioned along the X-axis direction, contacting the side of the workpiece away from the first positioning component 22. The third positioning component 24 is clamped and positioned along a horizontal Y-axis direction, on opposite sides of the workpiece. The X-axis is horizontal and perpendicular to the Y-axis. Thus, the first positioning component 22, the second positioning component 23, and the third positioning component 24 can achieve positioning of the workpiece from mutually perpendicular X-axis and Y-axis directions, preventing loosening and displacement of the workpiece during riveting processing, resulting in a more reasonable structure.

[0031] Please continue reading. Figure 3 and Figure 4 The first positioning component 22 includes a first linear actuator 221, a first lifting seat 222, a second linear actuator 223, and a first positioning element 224. In this embodiment, the first linear actuator 221 can be a cylinder, but is not limited thereto. The first linear actuator 221 is vertically fixed on the mounting bracket 21, and the first lifting seat 222 is vertically movably mounted on the mounting bracket 21. The first lifting seat 222 is fixedly connected to the drive end of the first linear actuator 221, so the first linear actuator 221 can drive the first lifting seat 222 to move vertically up and down. In this embodiment, the second linear actuator 223 can be a cylinder, but is not limited thereto. The second linear actuator 223 is fixed to the first lifting seat 222 along the X-axis, and the first positioning element 224 is fixed to the drive end of the second linear actuator 223, so the second linear actuator 223 can drive the first positioning element 224 to reciprocate along the X-axis to move closer to or away from the workpiece. The first positioning member 224 has a first positioning part 2241 formed on the side facing the second positioning assembly 23 along the X-axis direction, and can be matched and positioned with the workpiece through the first positioning part 2241.

[0032] Furthermore, the second positioning component 23 includes a third linear actuator 231 and a second positioning member 232. In this embodiment, the third linear actuator 231 can be selected as a cylinder, but is not limited thereto. The third linear actuator 231 is fixed to the mounting bracket 21 along the X-axis direction, and the second positioning member 232 is fixed to the drive end of the third linear actuator 231. Thus, the third linear actuator 231 can drive the second positioning member 232 to reciprocate along the X-axis direction to approach or move away from the workpiece. A second positioning part 2321 is formed on the side of the second positioning member 232 facing the first positioning member 224 along the X-axis direction. The second positioning part 2321 can match and position with the workpiece. Moreover, the first positioning part 2241 and the second positioning part 2321 are positioned relative to each other along the X-axis direction, abutting against the opposite sides of the workpiece, thereby positioning the workpiece in the X-axis direction through the positioning action of the first positioning part 2241 and the second positioning part 2321. Alternatively, in this embodiment, both the first positioning part 2241 and the second positioning part 2321 can be selected as groove structures that match and position the corresponding positioning part of the workpiece. Of course, in other embodiments, the first positioning part 2241 and the second positioning part 2321 can also be selected as protrusion structures that match and position the corresponding positioning part of the workpiece, depending on the different shapes of the corresponding positioning part of the workpiece. All of these are within the scope of protection of this application, and therefore will not be described in detail here.

[0033] Furthermore, the top of the first positioning member 224 has a first supporting portion 2242 for supporting the workpiece, and the top of the second positioning member 232 has a second supporting portion 2322 for supporting the workpiece. Thus, the workpiece can be supported at its bottom via the first supporting portion 2242 and the second supporting portion 2322. Preferably, in this embodiment, a third positioning portion 2323 is also formed on the second supporting portion 2322, allowing the second supporting portion 2322 to both support the workpiece and horizontally position it, resulting in a more rational structure. Optionally, in this embodiment, the third positioning portion 2323 can be selected as a protrusion structure that matches and positions the corresponding positioning part of the workpiece. Of course, in other embodiments, the third positioning portion 2323 can also be selected as a groove structure that matches and positions the corresponding positioning part of the workpiece, depending on the different shapes of the corresponding positioning parts. All of these are within the scope of protection of this application and will not be described in detail here.

[0034] Please continue reading. Figure 3 and Figure 4The third positioning component 24 includes: a fourth linear actuator 241, an opening / closing actuator 242, a first positioning clamping arm 243, and a second positioning clamping arm 244. In this embodiment, the fourth linear actuator 241 may be a cylinder, but is not limited thereto. The fourth linear actuator 241 is vertically fixed on the mounting bracket 21. In this embodiment, the opening / closing actuator 242 may be a pneumatic finger, but is not limited thereto. The opening / closing actuator 242 is horizontally fixed to the driving end of the fourth linear actuator 241, and the opening / closing direction of the opening / closing actuator 242 is arranged along the Y-axis direction. The first positioning clamping arm 243 is fixedly connected to one driving end of the opening / closing actuator 242, and the second positioning clamping arm 244 is fixedly connected to the other driving end of the opening / closing actuator 242. The first positioning clamping arm 243 and the second positioning clamping arm 244 are positioned and abut against opposite sides of the workpiece along the Y-axis direction. The opening and closing actuator 242 can drive the first positioning clamping arm 243 and the second positioning clamping arm 244 to open and close along the Y-axis, moving them away from or closer to the opposite sides of the workpiece, thereby clamping and positioning the workpiece in the Y-axis direction. Furthermore, the fourth linear actuator 241 of the bucket lid drives the opening and closing actuator 242 to move the first positioning clamping arm 243 and the second positioning clamping arm 244 vertically up and down, allowing them to move in multiple directions to prevent the workpiece from falling into or being removed from the first support portion 2242 and the second support portion 2322, resulting in a safer and more reasonable structure.

[0035] The first positioning part 2241 and the second positioning part 2321 cooperate to position the workpiece along the X-axis, and the first positioning clamping arm 243 and the second positioning clamping arm 244 cooperate to position the workpiece along the Y-axis, so as to prevent the workpiece from loosening or shifting during the riveting process. The structure is safer and more reasonable, and the riveting operation is more stable.

[0036] Please see Figure 5 and Figure 6The pre-pressing positioning mechanism 50 includes a second lifting plate 51, a third positioning member 52, and several first elastic members 53. The second lifting plate 51 is vertically movable at the bottom of the first lifting plate 40. In this embodiment, the first elastic members 53 can be selected as springs, but are not limited thereto. The first elastic members 53 all abut against the first lifting plate 40 and the second lifting plate 51. The first elastic members 53 constantly drive the second lifting plate 51 to move vertically downward, that is, the first elastic members 53 are compressed and abut against the first lifting plate 40 and the second lifting plate 51. The first elastic members 53 are horizontally spaced apart, so the elastic force of the first elastic members 53 can drive the second lifting plate 51 to automatically move downward and reset, making the structure simpler and more reasonable. Furthermore, the third positioning member 52 is fixed to the bottom of the second lifting plate 51, and a fourth positioning part 521 is formed at the bottom of the third positioning member 52. The fourth positioning part 521 is positioned and abuts against the top of the workpiece. Thus, the fourth positioning part 521 can be used to position and abut against the top of the workpiece. Alternatively, in this embodiment, the fourth positioning part 521 can be selected as a positioning step structure that matches and positions with the positioning part corresponding to the workpiece. Of course, in other embodiments, the fourth positioning part 521 can also be selected as other protrusions or grooves that match and position with the positioning part corresponding to the workpiece, depending on the different shapes of the positioning part corresponding to the workpiece. All of these are within the scope of protection of this application, and therefore will not be described in detail here. Furthermore, through the elastic force of the first elastic member 53, the second lifting plate 51 can drive the third positioning member 52 to float elastically. This not only avoids rigid collision with the workpiece to be riveted, but also ensures that the workpiece surface is pressed before riveting, making the structure more reasonable.

[0037] Please see Figure 5 Specifically, a first clearance through hole (not shown in the figure) is formed on the second lifting plate 51, and a second clearance through hole 522 is formed on the third positioning member 52. The second clearance through hole 522 is vertically connected to the first clearance through hole, and the riveting head 60 passes vertically through the first clearance through hole and the second clearance through hole 522 with gaps. Thus, by setting the first clearance through hole and the second clearance through hole 522, the vertical up and down movement of the riveting head 60 can be avoided, preventing obstruction of the riveting head 60, and the structure is more reasonable.

[0038] Please see Figure 5 and Figure 6The pre-compression positioning mechanism 50 also includes several limiting blocks 70, all of which are fixed to the bottom of the first lifting plate 40. The second lifting plate 51 is detachably positioned against the bottom of the limiting blocks 70. When the first lifting plate 40 moves upward, the limiting blocks 70 prevent the first lifting plate 40 from contacting and colliding with the second lifting plate 51, thus preventing damage. Furthermore, the limiting blocks 70 prevent the distance between the first lifting plate 40 and the second lifting plate 51 from becoming too close, which could cause excessive compression of the first elastic element 53 and excessive load. This prevents the stress generated by the load from exceeding the yield strength of the first elastic element 53, thereby ensuring that the first elastic element 53 can return to its original size and shape, resulting in a safer and more reasonable structure.

[0039] Please see Figure 1 , Figure 2 , Figure 5 and Figure 6 The riveting device 100 of this application further includes: a plurality of first guide posts 80a and first linear bearings 80b corresponding to each of the first guide posts 80a. The first guide posts 80a are all vertically fixedly connected to the mounting frame 21. The first linear bearings 80b are fixedly mounted on the first lifting plate 40, and each first linear bearing 80b is slidably sleeved on its corresponding first guide post 80a, thereby realizing the vertical movement of the first lifting plate 40 on the base frame 10. Through the sliding cooperation between the first linear bearings 80b and the first guide posts 80a, the vertical movement accuracy of the first lifting plate 40 is ensured, sliding friction is reduced, and movement is more flexible and stable. In a preferred embodiment, the riveting device 100 of this application further includes a second elastic element 90 corresponding to the first guide post 80a. In this embodiment, the second elastic element 90 can be selected as a spring, but is not limited thereto. The second elastic element 90 abuts against the bottom of the first lifting plate 40 and the base frame 10. The second elastic element 90 constantly drives the first lifting plate 40 to move vertically upward, that is, the second elastic element 90 is compressed and abuts against the bottom of the first lifting plate 40 and the support of the base frame 10. Thus, the elastic force of the second elastic element 90 can assist in driving the first lifting plate 40 to move upward and reset automatically, making the structure simpler and more reasonable. More specifically, in this embodiment, the second elastic element 90 is slidably sleeved on the first guide post 80a, making the installation structure of the second elastic element 90 more stable and reliable.

[0040] Please continue reading. Figure 1 , Figure 2 , Figure 5 and Figure 6In this embodiment, the pre-compression positioning mechanism 50 further includes: a plurality of limiting and guiding components 54, each including: a blocking plate 541, a plurality of second guide posts 542, and a second linear bearing 543 corresponding to each of the second guide posts 542. The second linear bearings 543 are all fixedly mounted on the first lifting plate 40. The top ends of the second guide posts 542 are all fixedly connected to the blocking plate 541, and the lower ends of the second guide posts 542 are all fixedly connected to the second lifting plate 51. The first lifting plate 40 is located between the blocking plate 541 and the second lifting plate 51, thereby achieving a vertically movable installation structure where the second lifting plate 51 is positioned at the bottom of the first lifting plate 40. Furthermore, the limiting effect of the blocking plate 541 prevents excessive movement of the second lifting plate 51, making the structure safer and more reasonable. In a preferred embodiment, the number of first elastic members 53 is the same as the number of second guide posts 542, that is, the first elastic members 53 are slidably sleeved on the second guide posts 542 in a one-to-one correspondence, making the installation structure of the first elastic members 53 more reasonable.

[0041] For example, in this embodiment, the workpiece riveted by the riveting device 100 of this application can be a lithium battery cover plate. After assembling the aluminum plate, explosion-proof sheet, lower plastic, coated aluminum parts, pressure ring, sealing ring, positive terminal, and negative terminal of the lithium battery cover plate, rivets are inserted into the corresponding holes in these parts and positioned on the positioning and bearing mechanism 20. Then, the vertical drive mechanism 30 drives the first lifting plate 40 vertically and the riveting head 60 vertically downward to rivet onto the corresponding riveting position on the lithium battery cover plate. Pressure is used to force the pointed tip of the rivet into the rivet head until the rivet's cylindrical base thickens and its head expands, thereby fastening the various parts of the lithium battery cover plate together. Furthermore, as... Figure 1 and Figure 2 As shown, in this embodiment, two riveting devices 100 of this application are used simultaneously to rivet both ends of the lithium battery cover plate. More specifically, four riveting devices 100 of this application can be used to simultaneously rivet both ends of two lithium battery cover plates to meet different riveting requirements. Of course, the specific type of workpiece riveted by the riveting device 100 of this application is not limited to this. Those skilled in the art can flexibly select other types of workpieces for riveting according to actual usage requirements, all of which are within the protection scope of this application. Therefore, further details are omitted here. The working principle of the riveting device 100 of this application will be described in detail with reference to the accompanying drawings:

[0042] First, the first linear actuator 221 drives the first lifting seat 222 to move vertically upward to a predetermined position, placing the workpiece to be riveted on the first bearing part 2242 and the second bearing part 2322, and the third positioning part 2323 is positioned and fitted at the bottom of the workpiece, making the structure more reasonable. Then, the second linear actuator 223 drives the first positioning member 224 to move along the X-axis direction to position and abut against the workpiece, and the third linear actuator 231 drives the second positioning member 232 to move along the X-axis direction to position and abut against the workpiece, so that the first positioning part 2241 and the second positioning part 2321 position the workpiece in the X-axis direction.

[0043] Then, the fourth linear actuator 241 drives the opening and closing actuator 242 to move the first positioning clamping arm 243 and the second positioning clamping arm 244 upward until the first positioning clamping arm 243 and the second positioning clamping arm 244 are both facing the opposite sides of the workpiece along the Y-axis. Then, the opening and closing actuator 242 drives the first positioning clamping arm 243 and the second positioning clamping arm 244 to close and cooperate along the Y-axis to approach and contact the opposite sides of the workpiece for clamping and positioning in the Y-axis direction.

[0044] Then, the vertical drive mechanism 30 drives the first lifting plate 40 to move vertically downward. When the fourth positioning part 521 on the third positioning member 52 is positioned against the top of the workpiece, the workpiece can be pre-pressed and positioned to prevent the workpiece from loosening or shifting during the riveting process.

[0045] Next, the first lifting plate 40 continues to move downward against the elastic force of the first elastic element 53 until the riveting head 60 rivets onto the corresponding riveting part on the workpiece to complete the riveting process.

[0046] Since the positioning and bearing mechanism 20 of the riveting device 100 of this application is located on the base frame 10, the workpiece to be riveted is positioned on the positioning and bearing mechanism 20; the first lifting plate 40 is vertically movable on the base frame 10, the vertical drive mechanism 30 is vertically located on the base frame 10, and the first lifting plate 40 is fixedly connected to the drive end of the vertical drive mechanism 30; the pre-pressing positioning mechanism 50 is located at the bottom of the first lifting plate 40, and the riveting head 60 is vertically fixed at the bottom of the first lifting plate 40, and both the pre-pressing positioning mechanism 50 and the riveting head 60 are located above the positioning and bearing mechanism 20. Therefore, the workpiece to be riveted is positioned on the positioning and bearing mechanism 20, and then the vertical drive mechanism 30 drives the first lifting plate 40 to move vertically downwards. When the pre-pressing positioning mechanism 50 pre-presses and positions the workpiece at the top, the vertical drive mechanism 30 continues to drive the first lifting plate 40 to move vertically downwards until the riveting head 60 rivets onto the corresponding riveting part on the workpiece to complete the riveting process. Not only is the structure simpler, but the processing is also simpler and faster, greatly improving efficiency. Furthermore, the pre-pressing and positioning mechanism 50 pre-presses and positions the workpiece at the top before the riveting head 60 performs the riveting process. This prevents the workpiece from loosening or shifting during riveting, ensuring that there are no gaps, riveting cracks, or weak riveting joints between the riveted parts. It also ensures a tight seal between the riveted parts, preventing leakage and resulting in stable overall riveting quality and a significantly higher pass rate. This allows it to better meet the demands of high-quality, high-efficiency production.

[0047] The present application has been described above with reference to the embodiments, but the present application is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the nature of the present application.

Claims

1. A riveting device, suitable for riveting workpieces, characterized in that, include: The system includes a base frame, a positioning and bearing mechanism, a vertical drive mechanism, a first lifting plate, a pre-pressing and positioning mechanism, and a riveting head. The positioning and bearing mechanism is mounted on the base frame, and the workpiece to be riveted and pressed is supported and positioned on the positioning and bearing mechanism. The first lifting plate is vertically movable on the base frame, the vertical drive mechanism is vertically mounted on the base frame, and the first lifting plate is fixedly connected to the drive end of the vertical drive mechanism; The pre-pressing positioning mechanism is located at the bottom of the first lifting plate, and the riveting head is vertically fixed at the bottom of the first lifting plate. Both the pre-pressing positioning mechanism and the riveting head are located above the positioning bearing mechanism. The positioning and bearing mechanism includes: a mounting frame, a first positioning component, a second positioning component, and a third positioning component. The mounting frame is fixed on the base frame. The first positioning component, the second positioning component, and the third positioning component are all disposed on the mounting frame. The first positioning component is positioned along a horizontal X-axis direction and abuts against one side of the workpiece. The second positioning component is positioned along the X-axis direction and abuts against the side of the workpiece away from the first positioning component. The third positioning component is clamped and positioned along a horizontal Y-axis direction on opposite sides of the workpiece. The X-axis is horizontal and perpendicular to the Y-axis. The pre-pressing positioning mechanism includes: a second lifting plate, a third positioning member, and a plurality of first elastic members. The second lifting plate is vertically movable at the bottom of the first lifting plate. The first elastic members are all abutted between the first lifting plate and the second lifting plate. The first elastic members constantly drive the second lifting plate to move vertically downward, and the first elastic members are distributed horizontally at intervals. The third positioning member is fixed to the bottom of the second lifting plate, and a fourth positioning part is formed at the bottom of the third positioning member. The fourth positioning part is positioned and abuts against the top of the workpiece. The second lifting plate has a first clearance through hole, the third positioning member has a second clearance through hole, the second clearance through hole is vertically connected to the first clearance through hole, and the riveting head passes vertically through the first clearance through hole and the second clearance through hole with gaps.

2. The riveting device as described in claim 1, characterized in that, The first positioning component includes: a first linear driver, a first lifting seat, a second linear driver, and a first positioning member. The first linear driver is vertically fixed on the mounting frame, and the first lifting seat is vertically movably mounted on the mounting frame. The first lifting seat is fixedly connected to the driving end of the first linear driver. The second linear driver is fixed on the first lifting seat along the X-axis direction, and the first positioning member is fixed to the driving end of the second linear driver. The first positioning member has a first positioning portion formed on the side facing the second positioning component along the X-axis direction.

3. The riveting device as described in claim 2, characterized in that, The second positioning component includes a third linear actuator and a second positioning member. The third linear actuator is fixed to the mounting bracket along the X-axis direction, and the second positioning member is fixed to the driving end of the third linear actuator. The second positioning member has a second positioning portion formed on one side of the second positioning member along the X-axis direction facing the first positioning member. The first positioning portion and the second positioning portion are positioned relative to each other along the X-axis direction and abut against the opposite sides of the workpiece.

4. The riveting device as described in claim 3, characterized in that, The top of the first positioning member has a first supporting portion for supporting the workpiece, the top of the second positioning member has a second supporting portion for supporting the workpiece, and a third positioning portion is also formed on the second supporting portion.

5. The riveting device as described in claim 1, characterized in that, The third positioning component includes: a fourth linear actuator, an opening / closing actuator, a first positioning clamping arm, and a second positioning clamping arm. The fourth linear actuator is vertically fixed to the mounting bracket, and the opening / closing actuator is horizontally fixed to the driving end of the fourth linear actuator, with the opening / closing direction of the opening / closing actuator arranged along the Y-axis. The first positioning clamping arm is fixedly connected to one driving end of the opening / closing actuator, and the second positioning clamping arm is fixedly connected to the other driving end of the opening / closing actuator. The first positioning clamping arm and the second positioning clamping arm are positioned relative to each other along the Y-axis, abutting against opposite sides of the workpiece.

6. The riveting device as described in claim 1, characterized in that, The pre-compression positioning mechanism further includes: a plurality of limiting blocks, all of which are fixed to the bottom of the first lifting plate, and the second lifting plate is detachably abutting against the bottom of the limiting blocks.

7. The riveting device as described in claim 1 or 6, characterized in that, Also includes: A plurality of first guide posts and a first linear bearing corresponding to each of the first guide posts, wherein the first guide posts are all vertically fixedly connected to the mounting frame, the first linear bearings are fixedly mounted on the first lifting plate, and the first linear bearings are slidably sleeved on the corresponding first guide posts. The pre-compression positioning mechanism further includes: a plurality of limiting and guiding components, the limiting and guiding components including: a blocking plate, a plurality of second guide posts and a second linear bearing corresponding to each of the second guide posts, the second linear bearings being fixedly mounted on the first lifting plate, the top ends of the second guide posts being fixedly connected to the blocking plate, the lower ends of the second guide posts being fixedly connected to the second lifting plate, and the first lifting plate being located between the blocking plate and the second lifting plate.

Images