A hub riveting device for synchronously riveting two flower discs

Abstract

The present invention relates to the technical field of hub manufacturing, and specifically relates to a hub riveting device for synchronously riveting two flanges. The device includes a machine base and a switching mechanism arranged on the machine base. The switching mechanism includes three docking stations, and clamping mechanisms are arranged on all three docking stations. The clamping mechanism includes two clamping structures, a riveting balance structure, and a synchronous driving structure; the two clamping structures are parallel to each other, and the clamping structure is used to clamp the middle part of the connecting shaft; the riveting balance structure is connected to the two clamping structures. When the two flanges are simultaneously riveted to the connecting shaft, the riveting balance structure applies forces along the axis of the connecting shaft and towards the two ends of the connecting shaft to the two clamping structures respectively; the synchronous driving structure is used to drive the two clamping structures to clamp simultaneously; the present invention is provided with a switching mechanism and a clamping mechanism, thereby reducing the resultant force received by the middle part of the connecting shaft when two flanges are riveted simultaneously and avoiding deformation of the connecting shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of hub manufacturing, and particularly to a hub riveting device for synchronously riveting two flanges. Background Art

[0002] In the hub manufacturing industry, the riveting process of hubs is a crucial link. A hub mainly consists of a connecting shaft and two flanges. The middle part of the connecting shaft has a smaller diameter, while the end part used for riveting with the flanges has a larger diameter. Most traditional hub riveting devices adopt the method of riveting the two flanges one by one. This riveting method not only has low efficiency but also is difficult to ensure the synchronism and consistency between the two flanges and the connecting shaft, thus affecting the overall quality and performance of the hub.

[0003] However, when riveting the two flanges to the connecting shaft simultaneously, the flanges will exert a large force towards the middle of the connecting shaft during riveting. Therefore, during the process of simultaneously riveting the two flanges to the connecting shaft, the middle part of the connecting shaft will be simultaneously subjected to extrusion forces from both ends, which may cause the middle part of the connecting shaft to be deformed due to excessive extrusion force, thus affecting the forming quality of the hub and subsequent use. Summary of the Invention

[0004] In view of the above problems, a hub riveting device for synchronously riveting two flanges is provided. By setting a switching mechanism, a clamping structure, a riveting balance structure, and a synchronous driving structure, the resultant force on the middle part of the connecting shaft during simultaneous riveting of the two flanges is reduced, the deformation of the connecting shaft is avoided, and the quality of the formed hub is improved.

[0005] To solve the problems of the prior art, the present invention provides a hub riveting device for synchronously riveting two flanges, which includes a machine base and a switching mechanism arranged on the machine base. The switching mechanism includes three docking stations, which respectively correspond to a loading station, a riveting station, and an unloading station, and clamping mechanisms are arranged on all three docking stations. The clamping mechanism includes two clamping structures, a riveting balance structure, and a synchronous driving structure; the two clamping structures are parallel to each other, and the clamping structure is used to clamp the middle part of the connecting shaft; the riveting balance structure is connected to the two clamping structures. When the two flanges are simultaneously riveted to the connecting shaft, the riveting balance structure respectively exerts forces along the axis of the connecting shaft and towards the two ends of the connecting shaft on the two clamping structures; the synchronous driving structure is used to drive the two clamping structures to clamp simultaneously.

[0006] Preferably, the clamping structure includes two symmetrically arranged clamping components. The clamping component includes a clamping cover and a clamping arm; the clamping cover has a first end and a second end, and the transition section between the first end and the second end is in a trumpet shape; one end of the clamping arm is connected to the clamping cover, and the other end of the clamping arm is connected to the synchronous driving structure.

[0007] Preferably, the clamping assembly further includes a plurality of rolling docking components, which are arranged at equal intervals on the inner side of the first end of the clamping cover.

[0008] Preferably, the clamping assembly further includes a flexible inner lining, which is attached to the inner side of the second end of the clamping cover.

[0009] Preferably, the rolling docking component includes a wheel frame and a plurality of rollers; the wheel frame is fixed on the clamping cover; the plurality of rollers are all installed on the wheel frame, and the plurality of rollers are linearly arranged along the axis direction of the connecting shaft, and the rolling direction of the rollers is parallel to the axis of the connecting shaft.

[0010] Preferably, the riveting balance structure includes two first guiding components and a first driving structure; the two first guiding components are arranged in parallel with each other, and the two first guiding components respectively correspond to the two clamping components in the clamping structure; the first driving structure is used to drive the two clamping structures to move away from each other along the guiding direction of the first guiding component.

[0011] Preferably, the first guiding component includes at least two first guide rods parallel to each other and two first connecting blocks, the first connecting blocks are simultaneously slidably connected to the two first guide rods, and the two first connecting blocks are respectively connected to the clamping components in the two clamping structures.

[0012] Preferably, both ends of each first guide rod are sleeved with first return springs, and the two ends of the first return spring are respectively connected to the first connecting block and the end of the first guide rod.

[0013] Preferably, the synchronous driving structure includes two second guiding components and a second driving structure; the two second guiding components are parallel to each other, and the second guiding component is connected to the two first guiding components; the second driving structure is connected to the two first guiding components and drives the two first guiding components to move along the second guiding component.

[0014] Preferably, the second driving structure includes a second double-headed lead screw and two transmission components; the axis direction of the second double-headed lead screw is parallel to the guiding direction of the first guiding component; the two transmission components are respectively arranged on the two threaded parts of the second double-headed lead screw, and the transmission components are respectively connected to the two first guiding components.

[0015] The beneficial effects of the present invention compared with the prior art are:

[0016] 1. The present invention is provided with a switching mechanism and three clamping mechanisms. The automatic switching among the feeding, riveting, and discharging stations is realized through the switching mechanism, greatly improving the production efficiency. The cooperation between the two clamping structures and the synchronous driving structure in the clamping mechanism ensures the stable clamping and releasing of the connecting shaft in the two clamping structures. The two clamping structures are arranged in parallel to clamp the middle part of the connecting shaft, maintaining the horizontal state of the connecting shaft during the riveting process, ensuring the alignment between the flower disc and the connecting shaft. The riveting balance structure applies a force towards the end of the connecting shaft to the two clamping structures during the riveting process, effectively offsetting the force applied by the flower disc to the connecting shaft, thereby reducing the resultant force received by the middle part of the connecting shaft when riveting two flower discs simultaneously, avoiding deformation of the connecting shaft, and improving the quality of the formed flower drum.

[0017] 2. The present invention is provided with a clamping assembly. When the clamping cover in the clamping assembly initially clamps the connecting shaft, the clamping cover clamps the middle part of the connecting shaft. During riveting, the riveting balance structure applies a force to the clamping structure, and the clamping cover moves towards the end of the connecting shaft. When the clamping cover moves to the transition area between the middle and the end of the connecting shaft, the trumpet-shaped transition section forms a resistance point, preventing further movement of the clamping cover. At this time, the force applied by the riveting balance structure to the clamping cover is effectively transmitted to the connecting shaft, balancing the force of the flower disc on the connecting shaft, preventing deformation of the connecting shaft, thus ensuring both the application of the force of the riveting balance structure to the connecting shaft and avoiding surface damage caused by excessive extrusion of the connecting shaft by the clamping structure.

[0018] 3. The present invention is provided with a plurality of rolling docking assemblies. When the clamping cover clamps the connecting shaft, the plurality of rolling docking assemblies are distributed around the connecting shaft in a circular array and form rolling contact with the surface of the connecting shaft, transforming the original sliding friction into rolling friction between the rolling docking assemblies and the connecting shaft, greatly reducing the friction coefficient, thereby effectively reducing scratches and wear on the surface of the connecting shaft and ensuring the smoothness and integrity of the connecting shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a perspective view of a flower drum riveting device for synchronous riveting of two flower discs according to the present invention.

[0020] Figure 2 is a perspective view of the clamping mechanism in a flower drum riveting device for synchronous riveting of two flower discs according to the present invention.

[0021] Figure 3 is a perspective view of the two clamping structures in a flower drum riveting device for synchronous riveting of two flower discs according to the present invention.

[0022] Figure 4 is a top view of the two clamping structures in a flower drum riveting device for synchronous riveting of two flower discs according to the present invention.

[0023] Figure 5 is Figure 4 The three-dimensional sectional view at A-A in the figure.

[0024] Figure 6 is Figure 5 The partially enlarged view at B in the figure.

[0025] Figure 7 is the three-dimensional view of the clamping assembly and the riveting balance structure in a hub riveting device for synchronously riveting two flanges according to the present invention.

[0026] Figure 8 is the three-dimensional view of the first guiding assembly and the first driving inner structure in a hub riveting device for synchronously riveting two flanges according to the present invention.

[0027] Figure 9 is the three-dimensional view of the first guiding assembly, the second guiding assembly and the second driving structure in a hub riveting device for synchronously riveting two flanges according to the present invention.

[0028] Figure 10 is the three-dimensional view of the first guide rod and the second guiding assembly in a hub riveting device for synchronously riveting two flanges according to the present invention.

[0029] Figure 11 is the three-dimensional view of the first guide rod, the second guide rod and the second driving structure in a hub riveting device for synchronously riveting two flanges according to the present invention.

[0030] The reference numerals in the figure are: 1, machine base; 2, switching mechanism; 3, clamping structure; 31, clamping assembly; 311, clamping cover; 312, clamping arm; 313, rolling docking assembly; 3131, wheel frame; 3132, roller; 314, flexible inner lining; 4, riveting balance structure; 41, first guiding assembly; 411, first guide rod; 412, first connecting block; 413, first return spring; 42, first driving structure; 421, first double-headed screw rod; 422, first driving plate; 5, synchronous driving structure; 51, second guiding assembly; 511, mounting plate; 512, second guide rod; 513, second return spring; 52, second driving structure; 521, second double-headed screw rod; 522, transmission assembly; 5221, moving block; 5222, second connecting block; 5223, second driving plate. Detailed implementation manners

[0031] To further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0032] Refer to Figures 1 to 11Shown: A hub riveting device for synchronously riveting two flower discs, including a machine base 1 and a switching mechanism 2 arranged on the machine base 1. The switching mechanism 2 includes three docking stations, which respectively correspond to the feeding station, the riveting station, and the discharging station, and clamping mechanisms are arranged on all three docking stations. The clamping mechanism includes two clamping structures 3, a riveting balance structure 4, and a synchronous driving structure 5; the two clamping structures 3 are parallel to each other, and the clamping structure 3 is used to clamp the middle part of the connecting shaft; the riveting balance structure 4 is connected to the two clamping structures 3. When the two flower discs are simultaneously riveted to the connecting shaft, the riveting balance structure 4 applies forces along the axis of the connecting shaft and towards the two ends of the connecting shaft to the two clamping structures 3 respectively; the synchronous driving structure 5 is used to drive the two clamping structures 3 to clamp simultaneously.

[0033] The hub is composed of a connecting shaft and two flower discs. The diameter of the middle part of the connecting shaft is smaller, while the diameters of the ends of the connecting shaft riveted to the two flower discs are larger. When the clamping mechanism is at the feeding station, the synchronous driving structure 5 operates the two clamping structures 3 to be in the open state. After the connecting shaft is horizontal and enters the middle parts of the two clamping structures 3 simultaneously, the synchronous driving structure 5 operates the two clamping structures 3 to clamp the connecting shaft, keeping the connecting shaft in a horizontal state. At this time, both clamping structures 3 clamp the middle part of the connecting shaft. When the switching mechanism 2 rotates the clamping mechanism to the riveting station, the two flower discs move towards the connecting shaft simultaneously to realize the riveting of the flower disc and the connecting shaft. Finally, the switching mechanism 2 transfers the processed hub to the discharging station, and the synchronous driving structure 5 operates the two clamping structures 3 to open, so that the clamping structures 3 release the clamping of the connecting shaft. However, during the riveting process, the flower disc will apply a first force towards the middle of the connecting shaft to the connecting shaft, resulting in a relatively large extrusion force on the connecting shaft. Therefore, during the riveting, the riveting balance structure 4 applies a second force towards the end of the connecting shaft to the clamping structure 3. Since the second force is collinear and opposite to the first force, the second force can offset part of the first force, thereby reducing the resultant force on the middle part of the connecting shaft when riveting two flower discs simultaneously, avoiding deformation of the connecting shaft, and improving the quality of the hub after forming.

[0034] Refer to Figure 3 、 Figure 4 、 Figure 5 and Figure 6 : The clamping structure 3 includes two symmetrically arranged clamping components 31, and the clamping component 31 includes a clamping cover 311 and a clamping arm 312; the clamping cover 311 has a first end and a second end, and the transition section between the first end and the second end is in a trumpet shape; one end of the clamping arm 312 is connected to the clamping cover 311, and the other end of the clamping arm 312 is connected to the synchronous driving structure 5.

[0035] When the riveting balance structure 4 applies a second force towards the end of the connecting shaft through the clamping structure 3, if it is only achieved by the static friction between the clamping structure 3 and the connecting shaft, when the static friction is large, although the second force can be applied to the connecting shaft, the force exerted by the clamping structure 3 perpendicular to the connecting shaft is large, and the surface of the connecting shaft is also prone to extrusion marks due to the extrusion of the clamping structure 3. When the static friction is small, although there will be no extrusion marks on the surface of the connecting shaft, the clamping structure 3 cannot apply the second force to the connecting shaft. Therefore, the clamping cover 311 is set in a horn shape. When clamping the connecting shaft, the synchronous driving structure 5 drives the first end of the clamping cover 311 to contact the connecting shaft through the clamping arm 312, and the extrusion force at the initial contact is relatively small, which helps to reduce the damage to the surface of the connecting shaft. As the riveting balance structure 4 applies a force to the clamping structure 3, the end of the clamping cover 311 moves towards the connecting shaft. When the clamping cover 311 moves to the transition area between the middle and the end of the connecting shaft, since this area also presents a horn shape, a resistance point is formed, effectively preventing the further movement of the clamping cover 311. At this time, the force applied by the riveting balance structure 4 to the clamping cover 311 is transmitted to the connecting shaft, thus ensuring the application of the second force and avoiding surface damage caused by excessive extrusion of the clamping structure 3.

[0036] Refer to Figure 5 and Figure 6 As shown: The clamping assembly 31 further includes a plurality of rolling docking assemblies 313, and the plurality of rolling docking assemblies 313 are arranged at equal intervals on the inner side of the first end of the clamping cover 311.

[0037] Under the action of the riveting balance structure 4, the clamping cover 311 is driven to move towards the end of the connecting shaft, and during this process, the clamping cover 311 maintains the clamping state of the connecting shaft. The direct sliding contact between the clamping cover 311 and the connecting shaft may cause scratches due to friction. Therefore, a plurality of rolling docking assemblies 313 are arranged at equal intervals on the inner side of the clamping cover 311. When the clamping covers 311 of the two clamping assemblies 31 clamp the connecting shaft at the same time, the plurality of rolling docking assemblies 313 on the two clamping covers 311 are distributed around the connecting shaft in an annular array and form contact with the surface of the connecting shaft. As the riveting balance structure 4 continues to drive the clamping cover 311 to move, rolling friction occurs between the rolling docking assemblies 313 and the connecting shaft, thereby effectively reducing the scratches and wear on the surface of the connecting shaft.

[0038] Refer to Figure 5 and Figure 6 As shown: The clamping assembly 31 further includes a flexible lining 314, and the flexible lining 314 is attached to the inner side of the second end of the clamping cover 311.

[0039] When the clamping cover 311 applies a force to the end of the connecting shaft under the action of the riveting balance structure 4, the clamping cover 311 will simultaneously receive a reaction force from the connecting shaft that is equal in magnitude and opposite in direction. Being in this stress state for a long time, the clamping cover 311 may deform, resulting in a change in the contact area between the clamping cover 311 and the connecting shaft, and further causing uneven force distribution on the connecting shaft. Therefore, a flexible inner lining 314 is added inside the second end of the clamping cover 311. The flexible inner lining 314 is made of a material with elastic recovery ability such as a rubber pad. It can deform when subjected to an external force and quickly return to its original state after the external force is removed. When the clamping cover 311 moves to the end of the connecting shaft, the flexible inner lining 314 can tightly fill the small gap between the inner wall of the clamping cover 311 and the outer wall of the connecting shaft, and adaptively deform according to the shape of the connecting shaft to ensure close fitting with the outer wall of the connecting shaft. The force received by the clamping cover 311 can be transmitted to the connecting shaft in a more uniform manner through the flexible inner lining 314, thus effectively avoiding the problem of uneven force on the surface of the connecting shaft caused by the deformation of the clamping cover 311.

[0040] Refer to Figure 5 and Figure 6 As shown: The rolling docking assembly 313 includes a wheel frame 3131 and a plurality of rollers 3132; the wheel frame 3131 is fixed on the clamping cover 311; a plurality of rollers 3132 are all installed on the wheel frame 3131, and the plurality of rollers 3132 are linearly arranged along the axial direction of the connecting shaft, and the rolling direction of the rollers 3132 is parallel to the axis of the connecting shaft.

[0041] When the clamping cover 311 acts vertically on the connecting shaft through the rolling docking assembly 313, in order to keep the connecting shaft fixed, the force applied by the rolling docking assembly 313 to the connecting shaft is relatively large. Although the rolling friction coefficient between the rolling docking assembly 313 and the connecting shaft is small, the movement resistance of the rolling docking assembly 313 is still relatively large. Therefore, a plurality of rollers 3132 are provided in the rolling docking assembly 313. When the clamping cover 311 clamps the connecting shaft, the plurality of rollers 3132 are in contact with the surface of the connecting shaft at the same time. The plurality of rollers 3132 increase the contact points between the clamping cover 311 and the connecting shaft, reduce the extrusion force between the rollers 3132 and the connecting shaft, and thus reduce the frictional resistance for the rolling docking assembly 313 to start.

[0042] Refer to Figure 2 , Figure 7 and Figure 8 As shown: The riveting balance structure 4 includes two first guiding components 41 and a first driving structure 42; the two first guiding components 41 are arranged in parallel with each other, and the two first guiding components 41 respectively correspond to two clamping components 31 in the clamping structure 3; the first driving structure 42 is used to drive the two clamping structures 3 to move away from each other along the guiding direction of the first guiding components 41.

[0043] Specifically, the first driving structure 42 includes a first double-headed lead screw 421 and two first driving plates 422. The axial direction of the first double-headed lead screw 421 is parallel to the guiding direction of the first guiding assembly 41, and the first double-headed lead screw 421 is arranged between the two first guiding assemblies 41. The middle parts of the two first driving plates 422 are respectively connected to the two threaded parts of the first double-headed lead screw 421, and the two ends of the first driving plate 422 are respectively connected to the two clamping assemblies 31 in the clamping structure 3.

[0044] The two first guiding assemblies 41 are connected to the synchronous driving structure 5. When the two clamping structures 3 need to clamp the connecting shaft, the synchronous driving structure 5 is activated to drive the two first guiding assemblies 41 and the clamping assemblies 31 thereon to approach each other until the two clamping assemblies 31 clamp the connecting shaft. During the riveting process, the first driving structure 42 starts to work. The first double-headed lead screw 421 in the first driving structure 42 rotates, causing the two first driving plates 422 to move away from each other under the drive of the first double-headed lead screw 421. The two first driving plates 422 respectively push the clamping structures 3 connected to them to move along the guiding direction of the first guiding assembly 41 until the clamping structure 3 forms a tight connection with the end of the connecting shaft. At this time, the first double-headed lead screw 421 stops rotating. Due to the self-locking characteristic of the threaded connection, the first driving plate 422 can maintain its fixed position after stopping moving, ensuring that the clamping structure 3 will not move accidentally during the riveting process. During the riveting operation, the connecting shaft is subjected to the force applied by the chuck. These forces are transmitted to the first driving plate 422 through the clamping structure 3. Since the position of the first driving plate 422 is fixed, it is ensured that the connecting shaft remains stable during the riveting process, avoiding unnecessary offset or deformation.

[0045] Refer to Figure 7 and Figure 8 As shown: The first guiding assembly 41 includes at least two mutually parallel first guide rods 411 and two first connection blocks 412. The first connection blocks 412 are simultaneously slidably connected to the two first guide rods 411, and the two first connection blocks 412 are respectively connected to the clamping assemblies 31 in the two clamping structures 3.

[0046] The first connecting block 412 is slidably connected to the two first guide rods 411 simultaneously, enabling the first connecting block 412 to maintain balance. The first connecting block 412 can only move along the first guide rods 411. The two clamping components 31 in the same clamping structure 3 are respectively connected to two opposite first connecting blocks 412 in the two first guiding components 41, and both ends of the first driving plate 422 are connected to the two first connecting blocks 412. When the first driving plate 422 moves, both ends of the first driving plate 422 simultaneously push the two first connecting blocks 412 to move. The two first connecting blocks 412 drive the two clamping components 31 in the same clamping structure 3 to move synchronously along the two first guide rods 411, and the connecting shaft is always under the clamping action of the two clamping components 31, making the connecting shaft parallel to the first guide rods 411, thus effectively preventing the connecting shaft from being unable to accurately dock with the two face plates due to shaking.

[0047] Refer to Figure 8 and Figure 9 As shown: A first return spring 413 is sleeved on both ends of each first guide rod 411, and both ends of the first return spring 413 are respectively connected to the first connecting block 412 and the end of the first guide rod 411.

[0048] Since the first guiding component 41 will move in a direction perpendicular to the first guide rods 411 following the clamping component 31, the first driving plate 422 and the first connecting block 412 cannot be fixedly connected. The first driving plate 422 can push the first connecting block 412 to move towards the end of the first guide rod 411, but cannot pull the first connecting block 412 to move towards the middle of the first guide rod 411. By sleeving the first return spring 413 on the end of the first guide rod 411, when the first driving plate 422 applies a force to make the first connecting block 412 move towards the end of the first guide rod 411, the first return spring 413 is gradually compressed and accumulates elastic potential energy to prepare for the subsequent reset action. After the riveting process is completed, the first double-headed lead screw 421 is activated to drive the two first driving plates 422 to move closer to each other. At this time, the previously compressed first return spring 413 releases its accumulated elastic potential energy, pushing the first connecting block 412 to move towards the middle of the first guide rod 411. And during this process, the first driving plate 422 plays a limiting role to ensure that the two first connecting blocks 412 always remain in contact with the first driving plate 422 and move synchronously during the reset, so as to achieve the complete reset of the clamping component 31.

[0049] Refer to Figure 2 、 Figure 9 and Figure 10As shown: The synchronous drive structure 5 includes two second guiding components 51 and a second driving structure 52; the two second guiding components 51 are parallel to each other, and the second guiding component 51 is connected to the two first guiding components 41; the second driving structure 52 is connected to the two first guiding components 41 and drives the two first guiding components 41 to move along the second guiding component 51.

[0050] Specifically, the second guiding component 51 includes a mounting plate 511, at least two sliding grooves are formed on the mounting plate 511, two second guide rods 512 are arranged in the two sliding grooves respectively, the two second guide rods 512 are respectively slidably connected to the two first guide rods 411, a second return spring 513 is sleeved on the second guide rod 512, and two ends of the second return spring 513 are respectively abutted against the middle parts of the first guide rod 411 and the mounting plate 511.

[0051] In the working process, when the clamping mechanism is at the loading station, the two clamping components 31 in the clamping structure 3 will be in an open state. At this time, the connecting shaft can be placed between the two clamping components 31. Subsequently, the second driving structure 52 is started, so that the two first guiding components 41 drive the clamping components 31 connected to each other to approach each other. During this process, the first guiding component 41 will slide smoothly along the second guide rod 512 in the second guiding component 51. Since the first guide rod 411 is guided and restricted by the two second guide rods 512, it is ensured that both ends of the first guide rod 411 can move synchronously. Therefore, the two clamping components 31 connected to the same first guiding component 41 can contact the connecting shaft synchronously, so as to ensure that the two clamping structures 3 clamp the connecting shaft synchronously, and the connecting shaft is kept parallel to the first guide rod 411 after being clamped.

[0052] Refer to Figure 9 and Figure 11 As shown: The second driving structure 52 includes a second double-headed lead screw 521 and two transmission components 522; the axial direction of the second double-headed lead screw 521 is parallel to the guiding direction of the first guiding component 41; the two transmission components 522 are respectively arranged on the two threaded parts of the second double-headed lead screw 521, and the transmission component 522 is respectively connected to the two first guiding components 41.

[0053] Specifically, the transmission component 522 includes a moving block 5221, two second connecting blocks 5222 and two second driving plates 5223. The moving block 5221 is arranged on the threaded part of the second double-headed lead screw 521. The two second connecting blocks 5222 are respectively connected to the two second guiding components 51. The two second driving plates 5223 are respectively arranged on both sides of the moving block 5221. Both ends of the second driving plate 5223 are axially connected to the moving block 5221 and the second connecting block 5222 respectively.

[0054] During the process of the driving and clamping structure 3 clamping the connecting shaft, the second double-headed lead screw 521 starts to rotate, and the moving block 5221 in the transmission component 522 will move towards the middle of the second double-headed lead screw 521. As the moving block 5221 moves, the two second driving plates 5223 start to apply a force towards each other to the two second connecting blocks 5222. The two second connecting blocks 5222 respectively transmit the force to the same end of the two first guiding components 41, generating the same pulling force on the two first guiding components 41. Moreover, since the two transmission components 522 work simultaneously and are both controlled by the second double-headed lead screw 521, the two ends of the two first guiding components 41 will be simultaneously subjected to the same pulling force, ensuring that the two first guiding components 41 can move at the same speed and in the same direction, thereby realizing the synchronous driving of the two clamping components 31.

[0055] The above embodiments only represent one or several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A hub riveting device for synchronously riveting two flower plates, characterized in that, It includes a machine base (1) and a switching mechanism (2) arranged on the machine base (1). The switching mechanism (2) includes three docking stations, which respectively correspond to a feeding station, a riveting station, and a discharging station. Clamping mechanisms are provided on all three docking stations. The clamping mechanism includes two clamping structures (3), a riveting balance structure (4), and a synchronous driving structure (5). The two clamping structures (3) are parallel to each other, and the clamping structure (3) is used to clamp the middle part of the connecting shaft. The riveting balance structure (4) is connected to the two clamping structures (3). When two flower discs are simultaneously riveted to the connecting shaft, the riveting balance structure (4) applies forces along the axis of the connecting shaft and towards the two ends of the connecting shaft to the two clamping structures (3) respectively. The synchronous driving structure (5) is used to drive the two clamping structures (3) to clamp and connect simultaneously. The clamping structure (3) includes two symmetrically arranged clamping components (31). The riveting balance structure (4) includes two first guiding components (41) and a first driving structure (42). The two first guiding components (41) are arranged parallel to each other, and the two first guiding components (41) respectively correspond to the two clamping components (31) in the clamping structure (3). The first driving structure (42) is used to drive the two clamping structures (3) to move away from each other along the guiding direction of the first guiding component (41).

2. The hub riveting device for synchronously riveting two flower discs according to claim 1, characterized in that, The clamping component (31) includes a clamping cover (311) and a clamping arm (312). The clamping cover (311) has a first end and a second end, and the transition section between the first end and the second end is trumpet-shaped. One end of the clamping arm (312) is connected to the clamping cover (311), and the other end of the clamping arm (312) is connected to the synchronous driving structure (5).

3. A hub riveting device for synchronously riveting two flower discs according to claim 2, characterized in that, The clamping component (31) further includes a plurality of rolling docking components (313), and the plurality of rolling docking components (313) are arranged at equal intervals on the inner side of the first end of the clamping cover (311).

4. A hub riveting device for synchronously riveting two flower discs according to claim 3, characterized in that, The clamping component (31) further includes a flexible inner lining (314), and the flexible inner lining (314) is attached to the inner side of the second end of the clamping cover (311).

5. A hub riveting device for synchronously riveting two flower discs according to claim 3, characterized in that, The rolling docking component (313) includes a wheel frame (3131) and a plurality of rollers (3132). The wheel frame (3131) is fixed on the clamping cover (311). The plurality of rollers (3132) are all installed on the wheel frame (3131), and the plurality of rollers (3132) are linearly arranged along the axis direction of the connecting shaft, and the rolling direction of the rollers (3132) is parallel to the axis of the connecting shaft.

6. A hub riveting device for synchronously riveting two flower discs according to claim 1, characterized in that The first guiding component (41) includes at least two mutually parallel first guide rods (411) and two first connection blocks (412). The first connection blocks (412) are simultaneously slidably connected to the two first guide rods (411), and the two first connection blocks (412) are respectively connected to the clamping components (31) in the two clamping structures (3).

7. A hub riveting device for synchronously riveting two flower discs according to claim 6, characterized in that, A first return spring (413) is sleeved at both ends of each first guide rod (411), and the two ends of the first return spring (413) are respectively connected to the first connection block (412) and the end of the first guide rod (411).

8. A hub riveting device for synchronously riveting two flower discs according to claim 1, characterized in that, The synchronous drive structure (5) includes two second guiding components (51) and a second drive structure (52); The two second guiding components (51) are parallel to each other, and the second guiding component (51) is connected to the two first guiding components (41); The second drive structure (52) is connected to the two first guiding components (41) and drives the two first guiding components (41) to move along the second guiding component (51).

9. A hub riveting device for synchronously riveting two flower plates according to claim 8, characterized in that, The second drive structure (52) includes a second double-headed lead screw (521) and two transmission components (522); The axial direction of the second double-headed lead screw (521) is parallel to the guiding direction of the first guiding component (41); The two transmission components (522) are respectively arranged on the two threaded portions of the second double-headed lead screw (521), and the transmission component (522) is respectively connected to the two first guiding components (41).

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