A punching and riveting connection device

Abstract

The present invention discloses a punching and riveting connection device, comprising a frame, a lifting and pressurizing device and a punching and riveting head component, wherein the frame is provided with a workpiece positioning seat, and the punching and riveting head component comprises a rivet cutter seat, a rivet cutter, a pressure shaft and an elastic member, wherein a plurality of rivet cutters are distributed on the rivet cutter seat along the circumferential direction and are connected to the rivet cutter seat in an axial direction in a relatively sliding manner, and the pressure shaft is matched with the rivet cutter seat in an axial direction in a sliding manner, and the rivet cutter is located below the pressure shaft, and when the pressure shaft moves downward relative to the rivet cutter seat, the lower end of the pressure shaft can drive the rivet cutter to extend downward from the lower end of the rivet cutter seat, and the two ends of the elastic member act on the rivet cutter seat and the pressure shaft respectively and can apply downward pressure from the pressure shaft to the rivet cutter seat, and the lifting and pressurizing device is connected to the upper end of the pressure shaft and can drive the punching and riveting head component to move up and down along the axial direction of the workpiece positioning seat. The punching and riveting connection device has a compact structure, is easy to install and maintain, has a low manufacturing cost, and can more efficiently perform punching and riveting connection processing of the main reduction flange and the dust cover.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing and manufacturing, and in particular to a punching and riveting connection device. Background Art

[0002] The main reducer is a mechanism installed on the drive axle that can change the torque and speed. Its basic function is to increase the torque from the transmission or universal transmission device, while reducing the speed and changing the direction of torque transmission.

[0003] Punch riveting is a cold connection technology used to connect two or more metal plates. The connection is achieved by causing plastic deformation at the riveting point.

[0004] like Figure 1 As shown in the figure, it is the installation diagram of the main reducer flange and dust cover riveted assembly on the main reducer assembly. The main reducer flange 01 and dust cover 02 riveted assembly is the first barrier of the main reducer assembly. Its function is to receive the power from the engine and prevent large particles of dust or particles and other debris from flying into the main reducer assembly when the vehicle is driving, causing bearing damage and failure. Therefore, the riveting quality of the dust cover 02 on the main reducer flange 01 is relatively important.

[0005] The existing technical solution is to first press the dust cover into the main reducer flange (the dust cover and the main reducer flange are interference fit), then spot weld the three positions of the joint to firmly fix the dust cover on the main reducer flange, and then perform electrophoresis anti-rust treatment. The existing technology has the following disadvantages: more processes, occupying a large space, and using special equipment such as welding equipment, which is costly. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a punching and riveting connection device, which has a simple operation process, a compact structure, is easy to install and maintain, has a low manufacturing cost, and can more efficiently perform the punching and riveting connection processing of the main reducer flange and the dust cover.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A punching and riveting connection device, comprising:

[0009] A frame, wherein the frame is provided with a workpiece positioning seat;

[0010] A lifting and pressurizing device, wherein the lifting and pressurizing device is installed on the frame;

[0011] The rivet head component comprises a rivet cutter seat, a rivet cutter, a pressure shaft and an elastic member, the rivet cutter seat is a cylindrical structure coaxially arranged with the axis of the workpiece positioning seat, the rivet cutter seat is provided with a plurality of rivet cutters distributed along the circumferential direction, the rivet cutters and the rivet cutter seat are relatively slidably connected in the axial direction of the rivet cutter seat, the pressure shaft and the rivet cutter seat are slidably matched in the axial direction, the upper end of the pressure shaft extends out of the upper end of the rivet cutter seat, the rivet cutter is located below the pressure shaft, and when the pressure shaft moves downward relative to the rivet cutter seat, the lower end of the pressure shaft can drive the rivet cutter to move downward relative to the rivet cutter seat and extend out of the lower end of the rivet cutter seat, one end of the elastic member acts on the rivet cutter seat and the other end acts on the pressure shaft, and the elastic member can apply downward pressure from the pressure shaft to the rivet cutter seat, and the lifting and pressing device is connected to the upper end of the pressure shaft and can drive the rivet head component to move up and down along the axial direction of the workpiece positioning seat.

[0012] Preferably, the inner ring of the rivet knife seat is provided with a rivet knife slot extending in the axial direction, the rivet knife is slidably arranged in the rivet knife slot, and the rivet knife seat is further provided with a rotation limiting mechanism for limiting the rotation of the rivet knife.

[0013] Preferably, an elastic member mounting seat is provided at the upper end of the rivet tool seat, and a protective cover that slides with the outer periphery of the elastic member mounting seat is provided at the upper end of the pressure shaft, an annular mounting groove for placing the elastic member is formed between the elastic member mounting seat, the protective cover and the pressure shaft, the lower end of the elastic member acts on the elastic member mounting seat and the upper end of the elastic member acts on the protective cover.

[0014] Preferably, the elastic member is a disc spring sleeved on the outer circumference of the pressure shaft.

[0015] Preferably, the lifting and pressing device is connected to the pressure shaft through a sliding plate, the frame is provided with at least one guide rod arranged parallel to the axis of the workpiece positioning seat, and the sliding plate is provided with a guide hole slidably matched with the guide rod.

[0016] Preferably, a guide sleeve slidably matched with the guide rod is provided in the guide hole.

[0017] Preferably, the lifting and pressurizing device is a gas-liquid booster cylinder.

[0018] Preferably, a proximity switch for detecting the moving position of the pressing shaft is provided on the frame, and the proximity switch is connected to the boosting action valve of the gas-liquid boosting cylinder.

[0019] Preferably, the frame is provided with a limit stop rod located above the workpiece positioning seat, and the limit stop rod limits the workpiece from moving upward.

[0020] Preferably, the rivet cutter seat is provided with three rivet cutters evenly distributed along the circumferential direction.

[0021] The working principle of the present invention is as follows:

[0022] When performing the punching and riveting connection between the main reduction flange and the dust cover, first place the main reduction flange and the dust cover together on the workpiece positioning seat of the frame, then start the lifting and pressurizing device to move the punching and rivet head component downward, and at the same time make the pressure shaft overcome the elastic force of the elastic member, and use the lower end of the rivet cutter seat to press the dust cover on the shaft of the main reduction flange. Then, the lifting and pressurizing device is further pressurized and controls the pressure shaft to descend, so that each rivet cutter is driven downward through the lower end of the pressure shaft to extend downward from the lower end of the rivet cutter seat. At this time, the rivet cutter causes the interference fit between the dust cover and the main reduction flange to produce plastic deformation, that is, the dust cover and the main reduction flange are riveted and fixed. After the punching and riveting process is completed, the lifting and pressurizing device drives the punching and rivet head component to rise, and removes the main reduction flange and dust cover riveting assembly for the next punching and riveting process.

[0023] The present invention has the following beneficial effects:

[0024] 1) The punching and riveting connection device has few control parts, simple operation procedures, easy installation and maintenance, and low manufacturing cost;

[0025] 2) The punching and riveting connection device has a compact structure and occupies little space;

[0026] 3) The punching and riveting connection device does not require special processing equipment such as welding equipment. It only needs to lift and lower the pressurizing device to achieve the punching and riveting connection of the workpiece through the rivet cutter, which has high reliability and low processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is the installation diagram of the main reducer flange and dust cover riveting assembly on the main reducer assembly;

[0029] Figure 2 It is a front view of a punch rivet head component in a specific embodiment of the present invention;

[0030] Figure 3 is a cross-sectional view of a punch rivet head component in a specific embodiment of the present invention;

[0031] Figure 4 It is a top view of a punch rivet head component in a specific embodiment of the present invention;

[0032] Figure 5 It is a three-dimensional diagram of a punch rivet head component in a specific embodiment of the present invention;

[0033] Figure 6 It is a front view of the punching and riveting connection device in a specific embodiment of the present invention;

[0034] Figure 7 It is a side view of the punching and riveting connection device in a specific embodiment of the present invention;

[0035] Figure 8 is a top view of a punching and riveting connection device in a specific embodiment of the present invention;

[0036] Fig. 9 It is a partial cross-sectional view of the gas-liquid booster cylinder, the punching and riveting head components and the frame in a specific embodiment of the present invention;

[0037] Fig.10 It is a stereoscopic diagram of a punching and riveting connection device in a specific embodiment of the present invention.

[0038] Figures 1 to 10 middle:

[0039] 01-main reducing flange, 02-dust cover, 1-first locking nut, 2-pressing shaft, 3-connecting cover, 4-protective cover, 5-disc spring, 6-disc spring mounting seat, 7-nut, 8-screw, 9-rivet knife, 10-rivet knife seat, 11-connecting screw, 12-gas-liquid booster cylinder, 13-gas-liquid booster cylinder mounting plate, 14-pressure cover, 15-guide rod, 16-second locking nut, 17-T-type connector, 18-T-type connector seat, 19-guide sleeve, 20-sliding plate, 21-punch rivet head component, 22-limit stop rod, 23-guide rod lower positioning sleeve, 24-workpiece positioning seat, 25-frame, 26-proximity switch bracket. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Please refer to Figures 1 to 10 , Figure 1 This is the installation diagram of the main reducer flange and dust cover riveting assembly on the main reducer assembly; Figure 2 It is a front view of a punch rivet head component in a specific embodiment of the present invention; Figure 3 is a cross-sectional view of a punch rivet head component in a specific embodiment of the present invention; Figure 4It is a top view of a punch rivet head component in a specific embodiment of the present invention; Figure 5 It is a three-dimensional diagram of a punch rivet head component in a specific embodiment of the present invention; Figure 6 It is a front view of the punching and riveting connection device in a specific embodiment of the present invention; Figure 7 It is a side view of the punching and riveting connection device in a specific embodiment of the present invention; Figure 8 is a top view of a punching and riveting connection device in a specific embodiment of the present invention; Fig. 9 It is a partial cross-sectional view of the gas-liquid booster cylinder, the punching and riveting head components and the frame in a specific embodiment of the present invention; Fig.10 It is a stereoscopic diagram of a punching and riveting connection device in a specific embodiment of the present invention.

[0042] The present invention provides a punching and riveting connection device, comprising: a frame 25, a lifting and pressurizing device and a punching and riveting head component 21, wherein the frame 25 is provided with a workpiece positioning seat 24; the lifting and pressurizing device is installed on the frame 25; the punching and riveting head component 21 comprises a rivet cutter seat 10, a rivet cutter 9, a pressing shaft 2 and an elastic member, the rivet cutter seat 10 is a cylindrical structure and is coaxially arranged with the axis of the workpiece positioning seat 24, a plurality of rivet cutters 9 distributed along the circumferential direction are arranged on the rivet cutter seat 10, the rivet cutters 9 are relatively slidably connected with the rivet cutter seat 10 in the axial direction of the rivet cutter seat 10, and the pressing shaft 2 is connected with the rivet cutter seat 10 along the axial direction. Axial sliding fit, the upper end of the pressing shaft 2 extends out of the upper end of the rivet knife seat 10, and the rivet knife 9 is located below the pressing shaft 2. When the pressing shaft 2 moves downward relative to the rivet knife seat 10, the lower end of the pressing shaft 2 can drive the rivet knife 9 to move downward relative to the rivet knife seat 10 and make the rivet knife 9 extend out of the lower end of the rivet knife seat 10. One end of the elastic member acts on the rivet knife seat 10 and the other end acts on the pressing shaft 2, and the elastic member can apply downward pressure from the pressing shaft 2 to the rivet knife seat 10. The lifting and pressing device is connected to the upper end of the pressing shaft 2 and can drive the punch rivet head component 21 to move up and down along the axial direction of the workpiece positioning seat 24.

[0043] The working principle of the present invention is as follows:

[0044] When performing the punching and riveting connection between the main reduction flange 01 and the dust cover 02, first place the main reduction flange 01 and the dust cover 02 together on the workpiece positioning seat 24 of the frame 25, then start the lifting and pressurizing device to move the punching and rivet head component 21 downward, and at the same time make the pressure shaft 2 overcome the elastic force of the elastic member, and use the lower end of the rivet knife seat 10 to press the dust cover 02 on the axis of the main reduction flange 01, then, make the lifting and pressurizing device further pressurize and control the pressure shaft 2 to descend, so as to drive each rivet knife 9 to extend downward from the lower end of the rivet knife seat 10 through the lower end of the pressure shaft 2, at this time, the rivet knife 9 causes the interference fit between the dust cover 02 and the main reduction flange 01 to produce plastic deformation, that is, the dust cover 02 and the main reduction flange 01 are riveted and fixed. After the punching and riveting process is completed, the lifting and pressurizing device drives the punching and rivet head component 21 to rise, and removes the main reduction flange and the dust cover riveting assembly for the next punching and riveting process.

[0045] In order to improve the production cycle, preferably, the punching and riveting connection device provided by the present solution is divided into two operating stations, left and right. Figure 6 and Fig.10 As shown in the figure, the structure and function of the left and right operating stations are the same, so this article only introduces one of them.

[0046] The rivet cutter 9 and the rivet cutter seat 10 are relatively slidably connected in the axial direction of the rivet cutter seat 10, so that the rivet cutter 9 can be extended from the lower end of the rivet cutter seat 10 under the drive of the pressure shaft 2, and then the workpiece is punched and riveted. The rivet cutter 9 can be relatively slidably connected with the rivet cutter seat 10 through a variety of structural methods, for example, a slot extending in the axial direction is provided on the rivet cutter seat 10 and the rivet cutter 9 is slidably matched with the slot; or a slide groove is provided on the side of the rivet cutter 9 and a block that slides with the slide groove is fixed on the rivet cutter seat 10, etc. These structures can make the rivet cutter 9 slide relative to the rivet cutter seat 10. Preferably, the inner ring of the rivet cutter seat 10 in this scheme is provided with a rivet cutter slot extending in the axial direction, and the rivet cutter 9 is slidably provided in the rivet cutter slot, and the rivet cutter seat 10 is also provided with a rotation limiting mechanism that limits the rotation of the rivet cutter 9. The rotation limiting mechanism can limit the rotation of the rivet cutter 9 around its own axis, ensuring that the blade of the rivet cutter 9 accurately impacts the position required for processing the workpiece, thereby improving the processing quality.

[0047] It should be noted that the above-mentioned rotation limiting mechanism can be designed in a variety of structural forms. For example, a non-circular arc limiting surface such as a plane, a right-angle surface or a V-shaped surface that matches the outer wall of the rivet cutter 9 is designed on the inner side of the rivet cutter slot of the rivet cutter seat 10. These limiting surfaces can limit the rotation of the rivet cutter 9 along its own axis; or a limiting block structure that contacts the outer wall of the rivet cutter 9 is provided on the rivet cutter seat 10. The limiting block structure can limit the rotation of the rivet cutter 9 along its own axis, etc. Preferably, the rotation limiting mechanism in this scheme includes a slide groove provided on the outer wall of the rivet cutter 9, and a screw 8 and a nut 7 provided on the side wall of the rivet cutter seat 10. The screw 8 crosses the side wall of the rivet cutter seat 10 and the end is stuck in the slide groove of the rivet cutter 9. The nut 7 is used to ensure that the screw 8 will not loosen. Since the end of the screw 8 can apply a limiting force along the tangential direction to the rivet cutter 9, the rivet cutter 9 cannot rotate along its own axis. At the same time, the end of the screw 8 can slide relatively in the slide groove along the axial direction of the rivet cutter 9, ensuring that the rivet cutter 9 can move up and down smoothly during the riveting process.

[0048] It should be noted that in this solution, the distribution of the punching and riveting positions required for processing can be determined according to the specific size of the workpiece and the conditions of use, thereby determining the number and arrangement of the rivet cutters 9. Preferably, the rivet cutter seat 10 in this solution is provided with three rivet cutters 9 evenly distributed along the circumferential direction.

[0049] Preferably, an elastic member mounting seat is provided at the upper end of the rivet cutter seat 10, a protective cover 4 is provided at the upper end of the pressure shaft 2 to be slidably matched with the outer periphery of the elastic member mounting seat, an annular mounting groove for placing the elastic member is formed between the elastic member mounting seat, the protective cover 4 and the pressure shaft 2, the lower end of the elastic member acts on the elastic member mounting seat and the upper end of the elastic member acts on the protective cover 4. By providing the elastic member mounting seat and the protective cover 4, a more closed and safe installation space can be provided for the elastic member, and at the same time, it is also convenient for the two ends of the elastic member to apply force to the pressure shaft 2 and the rivet cutter seat 10.

[0050] It should be noted that the elastic member used in the present invention can be selected from springs, elastic pads, metal elastic plates or other elastic elements. These elastic elements can produce tensile and compressive deformations in the axial direction of the rivet seat 10, that is, they can withstand the axial pressure from the pressing shaft 2 to the rivet seat 10. Preferably, a disc spring 5 is used in this solution, and the disc spring 5 is sleeved on the outer periphery of the pressing shaft 2. Figure 3 As shown, at this time, the elastic member mounting seat is specifically a disc spring mounting seat 6, and the disc spring mounting seat 6 is fixed to the upper end of the rivet seat 10 by a connecting screw 11. An annular mounting groove for mounting the disc spring 5 is formed between the disc spring mounting seat 6 and the pressure shaft 2. The lower end of the disc spring 5 acts on the disc spring mounting seat 6 and the upper end acts on the protective cover 4.

[0051] It should be noted that the lifting and pressurizing device can be directly connected to the pressing shaft 2 by using its telescopic end, or the connection and fixation between the telescopic end and the pressing shaft 2 can be achieved through other connecting parts, such as through couplings, T-type connectors or flanges. These connection methods can enable the lifting and pressurizing device to drive the pressing shaft 2 to move up and down, thereby completing the riveting operation. Preferably, the lifting and pressurizing device in this scheme is connected to the pressing shaft 2 through a sliding plate 20. In order to ensure that the rivet head component 21 remains stable during the lifting process, preferably, the frame 25 is also provided with at least one guide rod 15 arranged parallel to the axis of the workpiece positioning seat 24, and the sliding plate 20 is provided with a guide hole that slides with the guide rod 15. Figure 6As shown, the upper end of the guide rod 15 is fixed to the upper fixed plate of the frame 25 by the pressure cover 14, and the lower end of the guide rod 15 is positioned and installed to the lower fixed platform of the frame 25 by the lower positioning sleeve 23 of the guide rod. The guide rod 15 is arranged parallel to the axis of the workpiece positioning seat 24. With this arrangement, when the lifting and pressurizing device drives the rivet head component 21 to lift, the sliding plate 20 that is lifted together can slide with the guide rod 15 through its guide hole, and achieve smooth lifting and lowering under the guidance of the guide rod 15. Here, the sliding cooperation between the sliding plate 20 and the guide rod 15 forms a limiting mechanism that limits the left and right shaking or rotation of the rivet head component 21, thereby ensuring that the rivet head component 21 can only perform lifting and lowering movements, thereby ensuring that the device as a whole has sufficient rigidity and reliability, and improving the workpiece processing accuracy. Further preferably, in order to reduce the surface friction damage between the guide hole and the guide rod 15, the present scheme is provided with a guide sleeve 19 that slides with the guide rod 15 in the guide hole, such as Figure 6 As shown, the guide sleeve 19 can be made of alloy steel, wear-resistant resin and other materials.

[0052] It should be noted that the sliding plate 20 can be connected and fixed to the pressing shaft 2 and the lifting and pressing device in a variety of structural forms, such as a T-shaped connector, a flange seat, or a bolt plus a connecting plate. Preferably, the upper end of the pressing shaft 2 of the punch rivet head component 21 is connected and fixed to the sliding plate 20 through a connecting cover 3. Specifically, the upper end of the pressing shaft 2 passes through the center hole of the connecting cover 3, and the connecting cover 3 is fixed to the step of the pressing shaft 2 by using the first locking nut 1. The connecting cover 3 is provided with a plurality of connecting holes for connecting and fixing to the sliding plate 20, so that the punch rivet head component 21 is connected and fixed to the sliding plate 20 as a whole, such as Figure 4 The telescopic end of the lifting and pressurizing device is connected and fixed to the sliding plate 20 through a T-shaped connector 17 and a T-shaped connector seat 18. Specifically, the T-shaped connector seat 18 is fixed above the sliding plate 20, and the T-shaped connector 17 is fixed with the T-shaped connector seat 18 by snap-fitting, and the T-shaped connector 17 is then fixed to the telescopic end of the lifting and pressurizing device through a second locking nut 16.

[0053] It should be noted that the lifting and pressurizing device in the present invention can be a hydraulic cylinder, an air compressor and other equipment. Preferably, the lifting and pressurizing device in this scheme is a gas-liquid booster cylinder 12, such as Figure 6 As shown, the gas-liquid booster cylinder 12 is fixed to the top mounting plate of the frame 25 through the gas-liquid booster cylinder mounting plate 13. The gas-liquid booster cylinder 12 is generally referred to as a booster cylinder, which is an improved design combining the advantages of a gas cylinder and an oil cylinder. The gas-liquid booster cylinder can achieve the high output of an oil cylinder by using compressed air pressure, and does not require a hydraulic unit, thereby ensuring that the riveted joint of the workpiece is fully deformed during the punching and riveting process.

[0054] Preferably, a proximity switch for detecting the moving position of the pressing shaft 2 is provided on the frame 25, such as Figure 7 and Fig. 9 As shown, a proximity switch bracket 26 for installing a proximity switch is also provided on the frame 25, and the proximity switch is connected to the boosting action valve of the gas-liquid boosting cylinder 12. The height of the proximity switch corresponds to the height position at which the pressing shaft 2 starts to control the rivet cutter 9 to move downward. When the pressing shaft 2 drops to this height position, it means that the lower end of the rivet cutter seat 10 has interference-fitted the workpiece to be processed. At this time, the proximity switch is actuated and controls the boosting action valve to be turned on, and the gas-liquid boosting cylinder starts to further increase the pressure and control the telescopic end together with the pressing shaft 2 to continue to drop.

[0055] Preferably, a limit stop rod 22 is provided on the frame 25 and is located above the workpiece positioning seat 24. The limit stop rod 22 limits the upward movement of the workpiece to prevent the rivet cutter 9 from moving the workpiece upward when the cutter sticks after the punching and riveting process is completed. That is, the workpiece will be restricted and hindered by the limit stop rod 22 during the upward movement, thereby facilitating the separation of the workpiece from the rivet cutter 9 and facilitating the processing of the next workpiece.

[0056] The following describes the working process of the punching and riveting connection device provided by this solution in combination with the punching and riveting process of the automobile main reduction flange 01 and the dust cover 02:

[0057] Manually place the main reduction flange 01 and the dust cover 02 together on the workpiece positioning seat 24, start the gas-liquid booster cylinder 12, and the gas-liquid booster cylinder 12 drives the punch rivet head component 21 to move downward along the guide rod 15. During the downward movement, the punch rivet head component 21, under the action of the internal disc spring 15, transmits the pressure of the gas-liquid booster cylinder 12 from the pressure shaft 2 to the rivet knife seat 10, so that the dust cover 02 is pressed into the shaft of the main reduction flange 01 by the lower end of the rivet knife seat 10. When the pressure shaft 2 moves downward together with the sliding plate 20 to the proximity switch detection position, the proximity switch A switch signal is sent to the gas-liquid booster cylinder 12 and the booster action valve is controlled to be turned on. The gas-liquid booster cylinder 12 starts to increase pressure and controls the telescopic end together with the pressure shaft 2 to continue to descend. The elastic force of the disc spring 5 makes the lower end surface of the rivet knife seat 10 tightly press the dust cover 02 and ensure that the dust cover 02 is pressed into place. At the same time, the pressure shaft 2 further overcomes the elastic force of the disc spring 5 and exerts pressure on the upper end of each rivet knife 9, so that the blade of the rivet knife 9 is riveted to the interference interface position of the main reduction flange 01 and the dust cover 02, resulting in plastic deformation, thereby realizing the riveting connection between the main reduction flange and the dust cover 02.

[0058] The present invention has the following beneficial effects:

[0059] 1) The punching and riveting connection device has few control parts, simple operation procedures, easy installation and maintenance, and low manufacturing cost;

[0060] 2) The punching and riveting connection device has a compact structure and occupies little space;

[0061] 3) The punching and riveting connection device does not require special processing equipment such as welding equipment. It only needs to lift and lower the pressure device to achieve the punching and riveting connection of the workpiece through the rivet cutter. It has high rigidity and reliability and low processing cost.

[0062] 4) The punching and riveting process only uses a gas-liquid booster cylinder as the power source, and under the action of the guide sleeve and guide rod, the force and movement stability are guaranteed.

[0063] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A punching and riveting connection device, characterized in that: include: A frame (25), wherein the frame (25) is provided with a workpiece positioning seat (24); A lifting and pressurizing device, wherein the lifting and pressurizing device is installed on the frame (25); A punch rivet head component (21), the punch rivet head component (21) comprising a rivet cutter seat (10), a rivet cutter (9), a pressure shaft (2) and an elastic member, the rivet cutter seat (10) being a cylindrical structure coaxially arranged with the axis of the workpiece positioning seat (24), the rivet cutter seat (10) being provided with three rivet cutters (9) evenly distributed along the circumferential direction, the rivet cutters (9) being relatively slidably connected with the rivet cutter seat (10) in the axial direction of the rivet cutter seat (10), the pressure shaft (2) being slidably matched with the rivet cutter seat (10) in the axial direction, the upper end of the pressure shaft (2) extending out from the upper end of the rivet cutter seat (10), the rivet cutter (9) being located below the pressure shaft (2), and the pressure shaft (2) being arranged on the rivet cutter seat (10). When the shaft (2) moves downward relative to the rivet cutter seat (10), the lower end of the pressing shaft (2) can drive the rivet cutter (9) to move downward relative to the rivet cutter seat (10) and extend out of the lower end of the rivet cutter seat (10), thereby causing the blade of the rivet cutter to punch the interference interface position of the rivet component and produce plastic deformation. One end of the elastic member acts on the rivet cutter seat (10) and the other end acts on the pressing shaft (2), and the elastic member can apply downward pressure from the pressing shaft (2) to the rivet cutter seat (10). The lifting and pressurizing device is connected to the upper end of the pressing shaft (2) and can drive the punching rivet head component (21) to move upward and downward along the axial direction of the workpiece positioning seat (24); The inner ring of the rivet knife seat (10) is provided with a rivet knife slot extending in the axial direction, the rivet knife (9) is slidably arranged in the rivet knife slot, and the rivet knife seat (10) is also provided with a rotation limiting mechanism for limiting the rotation of the rivet knife (9); The rotation limiting mechanism comprises a sliding groove provided on the outer wall of the rivet cutter (9), and a screw (8) and a nut (7) arranged on the side wall of the rivet cutter seat (10); the screw (8) crosses the side wall of the rivet cutter seat (10) and the end of the screw (8) is stuck in the sliding groove of the rivet cutter (9); the end of the screw (8) applies a limiting force in a tangential direction to the rivet cutter (9); and the end of the screw (8) can slide relatively in the sliding groove along the axial direction of the rivet cutter (9); An elastic member mounting seat is arranged at the upper end of the rivet seat (10), and a protective cover (4) is arranged at the upper end of the pressure shaft (2) to be slidably matched with the outer periphery of the elastic member mounting seat. An annular mounting groove for accommodating the elastic member is formed between the elastic member mounting seat, the protective cover (4) and the pressure shaft (2), and the lower end of the elastic member acts on the elastic member mounting seat and the upper end of the elastic member acts on the protective cover (4).

2. The punch riveting connection device according to claim 1, characterized in that: The elastic member is a disc spring (5) sleeved on the outer circumference of the pressing shaft (2).

3. The punch riveting connection device according to claim 1, characterized in that: The lifting and pressing device is connected to the pressing shaft (2) via a sliding plate (20); the frame (25) is provided with at least one guide rod (15) arranged parallel to the axis of the workpiece positioning seat (24); and the sliding plate (20) is provided with a guide hole slidably matched with the guide rod (15).

4. The punch riveting connection device according to claim 3, characterized in that: A guide sleeve (19) is provided in the guide hole and is slidably matched with the guide rod (15).

5. The punch riveting connection device according to claim 1, characterized in that: The lifting and pressurizing device is a gas-liquid pressurizing cylinder (12).

6. The punch riveting connection device according to claim 5, characterized in that: The frame (25) is provided with a proximity switch for detecting the moving position of the pressing shaft (2), and the proximity switch is connected to the boosting action valve of the gas-liquid boosting cylinder (12).

7. The punch riveting connection device according to claim 1, characterized in that: The frame (25) is provided with a limit stop rod (22) located above the workpiece positioning seat (24), and the limit stop rod (22) limits the upward movement of the workpiece.

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