Hub riveting equipment capable of synchronously riveting two faceplates

Abstract

The invention relates to the technical field of hub manufacturing, in particular to hub riveting equipment capable of synchronously riveting two faceplates, which comprises a base and a switching mechanism arranged on the base, the switching mechanism comprises three butt-joint stations, and clamping mechanisms are arranged on the three butt-joint stations. The clamping mechanism comprises two clamping structures, a riveting balance structure and a synchronous driving structure; the two clamping structures are parallel to each other and are used for clamping the middle part of the connecting shaft; the riveting balance structure is connected with the two clamping structures, and when the two disc chucks are riveted with the connecting shaft at the same time, the riveting balance structure applies acting force to the two clamping structures along the axis of the connecting shaft and facing the two ends of the connecting shaft; the synchronous driving structure is used for driving the two clamping structures to be in clamping connection at the same time. The switching mechanism and the clamping mechanism are arranged, so that the resultant force borne by the middle of the connecting shaft when the two disc chucks are riveted at the same time is reduced, and deformation of the connecting shaft is avoided.

Description

Technical Field

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

[0002] In the hub manufacturing industry, the hub riveting process is a crucial link. The hub is mainly composed of a connecting shaft and two faceplates, where the middle diameter of the connecting shaft is small, while the end diameter used for riveting with the faceplates is large. Traditional hub riveting equipment mostly uses a method of riveting single faceplates one by one. This riveting method is not only inefficient, but also difficult to ensure the synchronization and consistency between the two faceplates and the connecting shaft, thus affecting the overall quality and performance of the hub.

[0003] However, when the two faceplates are riveted to the connecting shaft at the same time, the faceplates will exert a relatively large force on the connecting shaft toward the middle of the connecting shaft during riveting. Therefore, in the process of riveting the two faceplates to the connecting shaft at the same time, the middle of the connecting shaft will be subjected to extrusion pressure from both ends at the same time, which may cause the middle of the connecting shaft to be subjected to excessive extrusion pressure and deform, thereby affecting the molding quality and subsequent use of the hub. Summary of the invention

[0004] In view of the above problems, a hub riveting device for synchronously riveting two faceplates is provided. By arranging 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 when riveting two faceplates at the same time is reduced, deformation of the connecting shaft is avoided, and the quality of the hub after forming is improved.

[0005] In order to solve the problems of the prior art, the present invention provides a hub riveting device for synchronously riveting two faceplates, comprising a machine base and a switching mechanism arranged on the machine base, the switching mechanism comprising three docking stations, the three docking stations respectively corresponding to a loading station, a riveting station and a unloading station, and the three docking stations are all provided with a clamping mechanism, the clamping mechanism comprising two clamping structures, a riveting balance structure and a synchronous drive structure; the two clamping structures are parallel to each other, and the clamping structures are used to clamp the middle part of the connecting shaft; the riveting balance structure is connected to the two clamping structures, and when the two faceplates are riveted with the connecting shaft at the same time, the riveting balance structure applies a force along the axis of the connecting shaft and toward the two ends of the connecting shaft to the two clamping structures respectively; the synchronous drive structure is used to drive the two clamping structures to clamp the connection at the same time.

[0006] Preferably, the clamping structure includes two symmetrically arranged clamping assemblies, the clamping assemblies including 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 trumpet-shaped; 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 drive structure.

[0007] Preferably, the clamping assembly further comprises a plurality of rolling docking assemblies, and the plurality of rolling docking assemblies are arranged at equal intervals on the inner side of the first end portion of the clamping cover.

[0008] Preferably, the clamping assembly further comprises a flexible liner, which is fitted on the inner side of the second end portion of the clamping cover.

[0009] Preferably, the rolling docking assembly includes a wheel frame and multiple rollers; the wheel frame is fixed on the clamping cover; the multiple rollers are installed on the wheel frame, and the multiple rollers are arranged in a straight line along the axial 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 guide components and a first driving structure; the two first guide components are arranged parallel to each other, and the two first guide components respectively correspond to two clamping components in the clamping structure; the first driving structure is used to drive the two clamping structures away from each other along the guiding direction of the first guide components.

[0011] Preferably, the first guide assembly includes at least two mutually parallel first guide rods and two first connecting blocks, the first connecting block is slidably connected to the two first guide rods at the same time, and the two first connecting blocks are respectively connected to the clamping assemblies in the two clamping structures.

[0012] Preferably, both ends of each first guide rod are sleeved with a first return spring, and both 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 drive structure includes two second guide assemblies and a second drive structure; the two second guide assemblies are parallel to each other, and the second guide assemblies are connected to the two first guide assemblies; the second drive structure is connected to the two first guide assemblies and drives the two first guide assemblies to move along the second guide assemblies.

[0014] Preferably, the second driving structure includes a second double-ended screw and two transmission assemblies; the axial direction of the second double-ended screw is parallel to the guide direction of the first guide assembly; the two transmission assemblies are respectively arranged on the two threaded parts of the second double-ended screw, and the transmission assemblies are respectively connected to the two first guide assemblies.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is provided with a switching mechanism and three clamping mechanisms, and the switching mechanism is used to realize the automatic switching of the three workstations of loading, riveting and unloading, thereby greatly improving the production efficiency. The cooperation of the two clamping structures and the synchronous driving structure in the clamping mechanism ensures the stable clamping and release 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, so as to keep the connecting shaft in a horizontal state during the riveting process and ensure the alignment of the faceplate and the connecting shaft. The riveting balance structure applies a force toward the end of the connecting shaft to the two clamping structures during the riveting process, which effectively offsets the force applied by the faceplate to the connecting shaft, thereby reducing the resultant force on the middle part of the connecting shaft when the two faceplates are riveted at the same time, avoiding deformation of the connecting shaft and improving the quality of the hub after forming.

[0016] 2. The present invention provides a clamping assembly. When the clamping cover in the clamping assembly initially clamps the connecting shaft, the clamping cover is clamped in the middle of the connecting shaft. When riveting is performed, the riveting balance structure applies a force to the clamping structure, and the clamping cover moves toward 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, which prevents the clamping cover from further moving. 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 faceplate on the connecting shaft and preventing deformation of the connecting shaft, thereby ensuring the application of the force of the riveting balance structure on the connecting shaft and avoiding surface damage caused by excessive squeezing of the connecting shaft by the clamping structure.

[0017] 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, thereby converting 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

[0018] Figure 1 It is a stereoscopic diagram of a hub riveting device for synchronously riveting two faceplates of the present invention.

[0019] Figure 2 It is a stereoscopic diagram of a clamping mechanism in a hub riveting device for synchronously riveting two faceplates of the present invention.

[0020] Figure 3 It is a stereoscopic diagram of two clamping structures in a hub riveting device for synchronously riveting two faceplates of the present invention.

[0021] Figure 4 It is a top view of two clamping structures in a hub riveting device for synchronously riveting two faceplates of the present invention.

[0022] Figure 5 yes Figure 4 Stereoscopic cross-sectional view at AA in the middle.

[0023] Figure 6 yes Figure 5 A magnified partial view of point B in the middle.

[0024] Figure 7 It is a stereoscopic diagram of a clamping assembly and a riveting balance structure in a hub riveting device for synchronously riveting two faceplates of the present invention.

[0025] Figure 8 It is a stereoscopic diagram of a first guide assembly and a first driving inner structure in a hub riveting device for synchronously riveting two faceplates of the present invention.

[0026] Fig. 9 It is a stereoscopic diagram of a first guide assembly, a second guide assembly and a second driving structure in a hub riveting device for synchronously riveting two faceplates of the present invention.

[0027] Fig.10 It is a stereoscopic diagram of a first guide rod and a second guide assembly in a hub riveting device for synchronously riveting two faceplates of the present invention.

[0028] Fig.11 It is a stereoscopic diagram of a first guide rod, a second guide rod and a second driving structure in a hub riveting device for synchronously riveting two faceplates of the present invention.

[0029] The numbers 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 lining; 4, riveted balance structure; 41, first guide assembly; 411, first guide rod; 412, first connecting block; 413, first return spring; 42, first driving structure; 421, first double-headed screw; 422, first driving plate; 5, synchronous driving structure; 51, second guide assembly; 511, mounting plate; 512, second guide rod; 513, second return spring; 52, second driving structure; 521, second double-headed screw; 522, transmission assembly; 5221, moving block; 5222, second connecting block; 5223, second driving plate. DETAILED DESCRIPTION

[0030] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Reference Figures 1 to 11As shown: a hub riveting device for synchronously riveting two faceplates, comprising a machine base 1 and a switching mechanism 2 arranged on the machine base 1, the switching mechanism 2 comprising three docking stations, the three docking stations respectively corresponding to a loading station, a riveting station and a unloading station, and the three docking stations are all provided with a clamping mechanism, the clamping mechanism comprising 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 structures 3 are used to clamp the middle part of the connecting shaft; the riveting balance structure 4 is connected to the two clamping structures 3, and when the two faceplates are riveted with the connecting shaft at the same time, the riveting balance structure 4 applies a force along the axis of the connecting shaft and toward 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 at the same time.

[0032] The hub is composed of a connecting shaft and two faceplates. The middle diameter of the connecting shaft is smaller, while the end diameters of the connecting shaft and the two faceplates that are riveted are larger. When the clamping mechanism is in the loading station, the synchronous drive structure 5 operates the two clamping structures 3 to be in an open state. After the connecting shaft is horizontal and enters the middle of the two clamping structures 3 at the same time, the synchronous drive structure 5 operates the two clamping structures 3 to clamp the connecting shaft to keep the connecting shaft in a horizontal state. At this time, the two clamping structures 3 are clamped in the middle of the connecting shaft. When the switching mechanism 2 rotates the clamping mechanism to the riveting station, the two faceplates move toward the connecting shaft at the same time to achieve riveting of the faceplates and the connecting shaft. Finally, the switching mechanism 2 is added The completed hub is transferred to the unloading station, and the synchronous driving structure 5 operates the two clamping structures 3 to open, so that the clamping structures 3 loosen the clamping of the connecting shaft. However, during the riveting process, the faceplate will apply a first force toward the middle of the connection to the connecting shaft, resulting in a larger extrusion force on the connecting shaft. Therefore, during the riveting, the riveting balance structure 4 applies a second force toward the end of the connecting shaft to the clamping structure 3. Since the second force is colinear and opposite to the first force, the second force can offset part of the first force, thereby reducing the resultant force on the middle of the connecting shaft when the two faceplates are riveted at the same time, avoiding deformation of the connecting shaft, and improving the quality of the hub after forming.

[0033] Reference 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 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 drive structure 5.

[0034] When the riveted balancing structure 4 applies the second force toward 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 of the clamping structure 3 acting vertically on the connecting shaft is large, and the connecting shaft is also prone to have extrusion marks on the surface 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 to a trumpet shape. When clamping the connecting shaft, the synchronous drive structure 5 drives the clamping cover through the clamping arm 312 The first end of 311 contacts the connecting shaft, and the extrusion force during the initial contact is relatively small, which helps to reduce damage to the surface of the connecting shaft. As the riveted balancing structure 4 applies force to the clamping structure 3, the clamping cover 311 moves toward the end of 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 is also trumpet-shaped, a resistance point is formed, which effectively prevents the clamping cover 311 from moving further. At this time, the force applied by the riveted balancing structure 4 to the clamping cover 311 is transmitted to the connecting shaft, thereby ensuring the application of the second force and avoiding surface damage caused by excessive extrusion of the clamping structure 3.

[0035] Reference 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 portion of the clamping cover 311 .

[0036] Under the action of the riveted balancing structure 4, the clamping cover 311 is driven to move toward the end of the connecting shaft, and in this process the clamping cover 311 maintains a clamping state on 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 a circular array and form contact with the surface of the connecting shaft. As the riveted balancing structure 4 continues to drive the clamping cover 311 to move, rolling friction occurs between the rolling docking assembly 313 and the connecting shaft, thereby effectively reducing scratches and wear on the surface of the connecting shaft.

[0037] Reference Figure 5 and Figure 6 As shown, the clamping assembly 31 further includes a flexible liner 314 , which is attached to the inner side of the second end of the clamping cover 311 .

[0038] When the clamping cover 311 applies a force to the end of the connecting shaft under the action of the riveted balance structure 4, the clamping cover 311 will simultaneously receive a reaction force of equal magnitude and opposite direction from the connecting shaft. If the clamping cover 311 is in this force state for a long time, it may be deformed, resulting in a change in the contact area between the clamping cover 311 and the connecting shaft, thereby causing uneven force distribution on the connecting shaft. Therefore, a flexible lining 314 is added to the inner side of the second end of the clamping cover 311. The flexible lining 314 is made of a material with elastic recovery ability such as a rubber pad. It is made so that it can deform when subjected to external force and quickly return to its original shape after the external force is removed. When the clamping cover 311 moves to the end of the connecting shaft, the flexible lining 314 can tightly fill the tiny 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 the fit with the outer wall of the connecting shaft. The force applied to the clamping cover 311 can be transmitted to the connecting shaft in a more uniform manner through the flexible lining 314, thereby effectively avoiding the problem of uneven force on the surface of the connecting shaft caused by the deformation of the clamping cover 311.

[0039] Reference Figure 5 and Figure 6 As shown: the rolling docking assembly 313 includes a wheel frame 3131 and multiple rollers 3132; the wheel frame 3131 is fixed on the clamping cover 311; the multiple rollers 3132 are all installed on the wheel frame 3131, and the multiple rollers 3132 are arranged in a straight line 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.

[0040] 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 rolling docking assembly 313 applies a large force on the connecting shaft. 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 large. Therefore, multiple rollers 3132 are arranged in the rolling docking assembly 313. When the clamping cover 311 clamps the connecting shaft, the multiple rollers 3132 contact the surface of the connecting shaft at the same time. The multiple 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 friction resistance of the rolling docking assembly 313 when starting.

[0041] Reference Figure 2 , Figure 7 and Figure 8 As shown: the riveting balance structure 4 includes two first guide components 41 and a first driving structure 42; the two first guide components 41 are arranged parallel to each other, and the two first guide 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 guide components 41.

[0042] Specifically, the first driving structure 42 includes a first double-headed screw rod 421 and two first driving plates 422. The axial direction of the first double-headed screw rod 421 is parallel to the guide direction of the first guide assembly 41, and the first double-headed screw rod 421 is arranged between the two first guide 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 screw rod 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.

[0043] The two first guide components 41 are connected to the synchronous drive structure 5. When the two clamping structures 3 need to clamp the connecting shaft, the synchronous drive structure 5 starts to drive the two first guide components 41 and the clamping components 31 thereon to approach each other until the two clamping components 31 clamp the connecting shaft. During the riveting process, the first drive structure 42 starts to work, and the first double-headed screw 421 in the first drive structure 42 rotates, causing the two first drive plates 422 to move away from each other under the drive of the first double-headed screw 421. The two first drive plates 422 respectively push the clamping structures 3 connected to them along the first guide components 4 1 until the clamping structure 3 is tightly connected with the end of the connecting shaft. At this time, the first double-headed screw 421 stops rotating. Due to the self-locking characteristics of the threaded connection, the first driving plate 422 can keep its position fixed 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 exerted by the faceplate, and 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 to avoid unnecessary deviation or deformation.

[0044] Reference Figure 7 and Figure 8 As shown: the first guide assembly 41 includes at least two mutually parallel first guide rods 411 and two first connecting blocks 412, the first connecting block 412 is slidably connected to the two first guide rods 411 at the same time, and the two first connecting blocks 412 are respectively connected to the clamping assemblies 31 in the two clamping structures 3.

[0045] The first connecting block 412 is slidably connected to the two first guide rods 411 at the same time, so that the first connecting block 412 can maintain balance, and the first connecting block 412 can only move along the first guide rod 411. The two clamping components 31 in the same clamping structure 3 are respectively connected to the two opposite first connecting blocks 412 in the two first guide components 41, and the two ends of the first driving plate 422 are connected to the two first connecting blocks 412. When the first driving plate 422 moves, the two ends of the first driving plate 422 simultaneously push the two first connecting blocks 412 to move, and the two first connecting blocks 412 drive the two clamping components 31 in the same clamping structure 3 to move synchronously and along the two first guide rods 411, and the connecting shaft is always under the clamping action of the two clamping components 31, so that the connecting shaft and the first guide rod 411 remain parallel, thereby effectively preventing the connecting shaft from being unable to accurately dock with the two discs due to shaking.

[0046] Reference Figure 8 and Fig. 9 As shown, both ends of each first guide rod 411 are sleeved with a first return spring 413 , and both 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 .

[0047] Because the first guide assembly 41 will follow the clamping assembly 31 to move in a direction perpendicular to the first guide rod 411, the first driving plate 422 and the first connecting block 412 cannot be fixedly connected, and the first driving plate 422 can push the first connecting block 412 to move toward the end of the first guide rod 411, but cannot pull the first connecting block 412 to move toward the middle of the first guide rod 411. By sleeved with the first return spring 413 at the end of the first guide rod 411, when the first driving plate 422 applies force to make the first connecting block 412 move toward the end of the first guide rod 411, the first return spring 413 is 13 gradually compresses and accumulates elastic potential energy to prepare for the subsequent resetting action. After the riveting process is completed, the first double-headed screw 421 is started to drive the two first driving plates 422 to approach 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 toward the middle of the first guide rod 411, and in this process, the first driving plate 422 plays a limiting role, ensuring that the two first connecting blocks 412 always keep in contact with the first driving plate 422 and move synchronously when resetting, thereby achieving complete resetting of the clamping assembly 31.

[0048] Reference Figure 2 , Fig. 9 and Fig.10As shown: the synchronous drive structure 5 includes two second guide components 51 and a second drive structure 52; the two second guide components 51 are parallel to each other, and the second guide components 51 are connected to the two first guide components 41; the second drive structure 52 is connected to the two first guide components 41, and drives the two first guide components 41 to move along the second guide components 51.

[0049] Specifically, the second guide assembly 51 includes a mounting plate 511, which is provided with at least two sliding grooves, and second guide rods 512 are arranged in the two sliding grooves. The two second guide rods 512 are respectively slidably connected to the two first guide rods 411, and a second return spring 513 is sleeved on the second guide rod 512. The two ends of the second return spring 513 are respectively abutted against the first guide rod 411 and the middle part of the mounting plate 511.

[0050] In the working process, when the clamping mechanism is in 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 guide components 41 drive the clamping components 31 connected to each other to approach each other. During this process, the first guide component 41 will slide smoothly along the second guide rod 512 in the second guide component 51. Since the first guide rod 411 is guided and restricted by the two second guide rods 512, it is ensured that the two ends of the first guide rod 411 can move synchronously. Therefore, the two clamping components 31 connected to the same first guide component 41 can contact the connecting shaft synchronously, thereby ensuring that the two clamping structures 3 clamp the connecting shaft synchronously, so that the connecting shaft remains parallel to the first guide rod 411 after being clamped.

[0051] Reference Fig. 9 and Fig.11 As shown: the second driving structure 52 includes a second double-headed screw 521 and two transmission assemblies 522; the axial direction of the second double-headed screw 521 is parallel to the guide direction of the first guide assembly 41; the two transmission assemblies 522 are respectively arranged on the two threaded parts of the second double-headed screw 521, and the transmission assemblies 522 are respectively connected to the two first guide assemblies 41.

[0052] Specifically, the transmission assembly 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 portion of the second double-headed screw 521, the two second connecting blocks 5222 are respectively connected to the two second guide assemblies 51, and the two second driving plates 5223 are respectively arranged on both sides of the moving block 5221, and the two ends of the second driving plate 5223 are respectively connected to the moving block 5221 and the second connecting block 5222.

[0053] In the process of driving the clamping structure 3 to clamp the connecting shaft, the second double-headed screw 521 begins to rotate, and the moving block 5221 in the transmission assembly 522 moves toward the middle of the second double-headed screw 521. As the moving block 5221 moves, the two second driving plates 5223 begin to apply opposite forces to the two second connecting blocks 5222. The two second connecting blocks 5222 transmit the forces to the same end of the two first guide assemblies 41, respectively, to generate the same pulling force on the two first guide assemblies 41. Moreover, since the two transmission assemblies 522 work at the same time and are both controlled by the second double-headed screw 521, the two ends of the two first guide assemblies 41 will be subjected to the same pulling force at the same time, ensuring that the two first guide assemblies 41 can move at the same speed and direction, thereby realizing the synchronous driving of the two clamping assemblies 31.

[0054] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A hub riveting device for synchronously riveting two faceplates, characterized in that: It comprises a machine base (1) and a switching mechanism (2) arranged on the machine base (1), the switching mechanism (2) comprising three docking stations, the three docking stations respectively corresponding to a loading station, a riveting station and a unloading station, and the three docking stations are all provided with a clamping mechanism, the clamping mechanism comprising two clamping structures (3), a riveting balance structure (4) and a synchronous drive structure (5); The two clamping structures (3) are parallel to each other, and the clamping structures (3) are used to clamp the middle part of the connecting shaft; The riveting balance structure (4) is connected to the two clamping structures (3), and when the two faceplates are riveted to the connecting shaft at the same time, the riveting balance structure (4) applies forces along the axis of the connecting shaft and toward 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 them simultaneously.

2. A hub riveting device for synchronously riveting two faceplates according to claim 1, characterized in that: The clamping structure (3) comprises two symmetrically arranged clamping assemblies (31), wherein the clamping assembly (31) comprises a clamping cover (311) and a clamping arm (312); The clamping cover (311) has a first end and a second end, and a 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 drive structure (5).

3. A hub riveting device for synchronously riveting two faceplates according to claim 2, characterized in that: The clamping assembly (31) further comprises a plurality of rolling docking assemblies (313), wherein the plurality of rolling docking assemblies (313) are arranged at equal intervals on the inner side of the first end portion of the clamping cover (311).

4. A hub riveting device for synchronously riveting two faceplates according to claim 3, characterized in that: The clamping assembly (31) further comprises a flexible liner (314), which is fitted on the inner side of the second end of the clamping cover (311).

5. The hub riveting device for synchronously riveting two faceplates according to claim 3, characterized in that: The rolling docking assembly (313) comprises 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 mounted on the wheel frame (3131), and the plurality of rollers (3132) are arranged in a straight line 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. The hub riveting device for synchronously riveting two faceplates according to claim 1, characterized in that: The riveting balance structure (4) comprises two first guide assemblies (41) and a first driving structure (42); The two first guide assemblies (41) are arranged parallel to each other, and the two first guide assemblies (41) respectively correspond to the two clamping assemblies (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).

7. A hub riveting device for synchronously riveting two faceplates according to claim 6, characterized in that: The first guide assembly (41) comprises at least two mutually parallel first guide rods (411) and two first connection blocks (412); the first connection blocks (412) are slidably connected to the two first guide rods (411) at the same time, and the two first connection blocks (412) are respectively connected to the clamping assemblies (31) in the two clamping structures (3).

8. The hub riveting device for synchronously riveting two faceplates according to claim 7, characterized in that: 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 connection block (412) and the end of the first guide rod (411).

9. The hub riveting device for synchronously riveting two faceplates according to claim 1, characterized in that: The synchronous drive structure (5) comprises two second guide assemblies (51) and a second drive structure (52); The two second guide assemblies (51) are parallel to each other, and the second guide assemblies (51) are connected to the two first guide assemblies (41); The second driving structure (52) is connected to the two first guide assemblies (41), and drives the two first guide assemblies (41) to move along the second guide assembly (51).

10. The hub riveting device for synchronously riveting two faceplates according to claim 9, characterized in that: The second driving structure (52) comprises a second double-ended screw rod (521) and two transmission assemblies (522); The axial direction of the second double-ended screw rod (521) is parallel to the guiding direction of the first guiding assembly (41); The two transmission assemblies (522) are respectively arranged on the two threaded parts of the second double-ended screw rod (521), and the transmission assemblies (522) are respectively connected to the two first guide assemblies (41).

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