A multi-station rotary riveting machine

Abstract

The present invention relates to the technical field of riveting machines, and discloses a multi-station rotary riveting machine, comprising an operating table, a mounting base being mounted on the operating table, a lifting arm being slidably mounted on the mounting base, a base being mounted on the lifting arm, and the bottom of the base being connected to a riveting head via a hydraulic cylinder; further comprising a material tray for placing a plurality of materials; a loading assembly for cyclically conveying the material tray to the riveting station; a unloading assembly for automatically unloading the material; and a clamping assembly for clamping the material tray. By setting the loading assembly, the two gaskets are automatically separated when the support plate moves to the bottom, causing a material tray to fall onto the support plate. After the support plate leaves, the two gaskets automatically approach to lift the remaining material trays. The four support plates convey the material trays in turn to the bottom of the riveting head for riveting operations in a cyclic rotation manner, thereby achieving the effect of automatic cyclic feeding and improving work efficiency and safety.

Description

Technical Field

[0001] The present invention relates to the technical field of riveting machines, in particular to a multi-station rotary riveting machine. Background Art

[0002] Riveting machine, also known as riveting machine, rotary riveting machine, riveting machine, rolling riveting machine, etc., is a riveting equipment made based on the principle of cold rolling. It can use rivets to connect objects. It has a compact structure, stable performance, and convenient and safe operation. It mainly relies on rotation and pressure to complete assembly. Common types include pneumatic, hydraulic, electric, and single-head and double-head specifications.

[0003] Chinese patent CN206731962U discloses a "riveting machine", which includes a machine body, an electrically controlled rivet head device, a support block, and a support column. A fixed block 1 is provided on one side of the machine body, a cylindrical shaft body is provided on the fixed block 1, a metal shell is provided on the cylindrical shaft body, a connector is provided on the metal shell, a plate 1 is provided on the connector, a plate 2 is provided on the plate 1, and a first groove is provided on the plate 2. The riveting machine can ensure that the larger plates to be riveted will not shake at will during the riveting process, and the center of gravity is on the horizontal line, thereby ensuring a smooth and accurate riveting process.

[0004] However, the existing technology has the following problems:

[0005] In actual use, existing riveting machines usually require workers to manually place materials under the riveting machine. After riveting is completed, they manually replace the next material to continue the operation. Manual loading and unloading wastes a lot of time, the overall work efficiency is low, and there is a risk of pinching the hands during operation. Summary of the Invention

[0006] The purpose of the present invention is to provide a multi-station rotary riveting machine in order to solve the above problems and overcome the defects of the prior art, as described in detail below.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] The present invention provides a multi-station rotary riveting machine, which includes an operating table, a mounting base is installed on the operating table, a lifting arm is slidably installed on the mounting base, a machine base is installed on the lifting arm, and the bottom of the machine base is connected to a rivet head through a hydraulic cylinder; it also includes a material tray for placing multiple materials; a loading assembly for cyclically conveying the material tray to the riveting station; a unloading assembly for automatically unloading the material; a clamping assembly for clamping the material tray; the loading assembly includes a cross bar, which is connected to the lifting arm, and the end of the cross bar away from the lifting arm is hinged to a connecting rod, a sliding rod is slidably connected to the operating table, the sliding rod is hinged to the end of the connecting rod away from the lifting arm, and the end of the sliding rod away from the connecting rod is hinged to a driving rod, a rotating shaft is rotatably connected to the operating table, the top of the rotating shaft is connected to four support plates, and the bottom of the rotating shaft is connected to a windmill wheel.

[0009] Preferably, the four support plates are all located above the operating table, and the four support plates are arranged in a circular array. The windmill wheel is located below the operating table, and four arc corners are provided on the windmill wheel. The shift rod contacts one of the arc corners during movement, and a limit rod is provided between the shift rod and the slide rod, and a spring is provided between the shift rod and the slide rod.

[0010] Preferably, a mounting frame is installed on the operating table, a material rack is installed on the mounting frame, a plurality of material trays are stacked in the material rack, a side of the mounting frame close to the rotating shaft is connected to a door-type frame through a spring, a side of the door-type frame close to the rotating shaft is connected to an arc block, the top of the support plate is connected to a shift shaft, the shift shaft contacts the arc block during movement, the front and rear sides of the mounting frame are respectively connected to side plates, the bottom of the side plate is slidably connected to a gasket, a rebound frame is connected to the side plate, and a plurality of springs are arranged between the rebound frame and the gasket.

[0011] Preferably, the two gaskets respectively pass through the front and rear sides of the mounting frame, the bottom surface of the gasket and the bottom surface of the mounting frame are located in the same plane, the ends of the two gaskets close to each other are set to be chamfered, and the support plate passes under the mounting frame when moving.

[0012] Preferably, the gasket is provided with an inclined surface, the two gaskets are arranged in a mirror image, and both ends of the portal frame are respectively provided with inclined surfaces, and the two inclined surfaces of the portal frame are in sliding contact with the inclined surfaces of the two gaskets respectively.

[0013] Preferably, the unloading assembly includes a material box, which is connected to the operating table, and the outer wall of the material box close to the mounting frame is connected to a baffle, the inner wall of the material box is provided with a slide, and the inner wall of the material box is slidably connected to a movable plate.

[0014] Preferably, the support plate passes under the blocking rod when moving, the movable plate is located under the slide, and a plurality of constant force springs are provided between the movable plate and the bottom inner wall of the material box.

[0015] Preferably, the clamping assembly includes four connecting blocks, which are respectively installed on the bottom of four support plates through springs, four through slots are provided on the support plates, the top surface of the connecting block is connected to four clamping blocks, the four clamping blocks are respectively slidably connected to the four through slots of the support plates, the side of the connecting block close to the rotating shaft is connected to a sliding shaft, the outer wall of the rotating shaft is connected to an arc ring, and the four sliding shafts are in sliding contact with the top surface of the arc ring.

[0016] Preferably, a right-angle frame is installed on the operating table, and two pressure blocks are installed on the right-angle frame through springs. The support plate passes under the pressure blocks when moving, and the top of the clamping block is set to be chamfered.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This multi-station rotary riveting machine, through the cooperation of the material tray and the riveting head, realizes the riveting of multiple materials at one time, thus improving work efficiency; through the setting of the loading component, the staff can place multiple material trays into the material rack at one time, and the two gaskets automatically separate when the pallet moves to the bottom, allowing one material tray to fall onto the pallet. After the pallet leaves, the two gaskets automatically move closer to lift the remaining material trays. The four pallets transport the material trays in turn to the bottom of the riveting head for riveting operations through cyclic rotation, achieving the effect of automatic cyclic feeding, reducing the steps of manual operation, and further improving work efficiency and safety.

[0019] 2. The multi-station rotary riveting machine, through the setting of the unloading component, allows the riveted material tray to be pushed off by the baffle rod and then slide into the material box for collection through the slide, achieving the effect of automatic unloading; through the setting of the movable plate, the movable plate can automatically move down as the number of material trays above it increases, so that the landing point of the material tray sliding down the slide is always maintained at a higher position, shortening the falling distance of the material tray, and preventing the material tray from being damaged due to excessive falling distance.

[0020] 3. The multi-station rotary riveting machine, through the setting of the clamping assembly, enables the four clamping blocks to automatically rise before the riveting operation is about to begin, clamping the material tray on the pallet stably and maintaining stability during the riveting operation. After the riveting operation is completed, the four clamping blocks automatically move down to release the material tray from the clamping, so that the material tray can be unloaded smoothly without affecting the next material tray being placed on the pallet; through the cooperation of the four clamping blocks and the two pressing blocks, the four clamping blocks can center the material tray through their own chamfers when moving up, and also play a role in centering while clamping, avoiding affecting the operation quality due to the displacement of the material tray during the riveting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic structural diagram of the feeding assembly of the present invention;

[0024] Figure 3 It is a schematic diagram of the wind wheel structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the support plate structure of the present invention;

[0026] Figure 5 It is a schematic diagram of the material rack structure of the present invention;

[0027] Figure 6 It is a schematic diagram of the portal frame structure of the present invention;

[0028] Figure 7 It is a schematic diagram of the gasket structure of the present invention;

[0029] Figure 8 It is a schematic structural diagram of the blanking assembly of the present invention;

[0030] Figure 9 It is a schematic diagram of the structure of the material box of the present invention;

[0031] Figure 10 It is a schematic structural diagram of the clamping assembly of the present invention;

[0032] Figure 11 It is a schematic diagram of the arc surface ring structure of the present invention;

[0033] Figure 12It is a schematic diagram of the clamping block structure of the present invention.

[0034] The accompanying drawings are marked as follows: 1. Operating table; 2. Mounting base; 3. Lifting arm; 4. Machine base; 5. Riveted joint; 6. Loading assembly; 61. Cross bar; 62. Connecting rod; 63. Sliding rod; 64. Rotating shaft; 65. Wind wheel; 66. Driving rod; 67. Support plate; 68. Mounting frame; 69. Material rack; 610. Driving shaft; 611. Door frame; 612. Arc block; 613. Side plate; 614. Gasket; 615. Rebound frame; 7. Unloading assembly; 71. Stop rod; 72. Material box; 73. Slide; 74. Movable plate; 8. Clamping assembly; 81. Connecting block; 82. Clamping block; 83. Sliding shaft; 84. Arc ring; 85. Right-angle frame; 86. Pressing block; 9. Material tray. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other implementations obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention. Example

[0036] See also Figure 1 - Figure 12 The lifting arm 3 is provided with a plurality of lifting arms 3, and a base 4 is installed on the lifting arm 3. The bottom of the base 4 is connected to a riveting head 5 through a hydraulic cylinder; it also includes a material tray 9 for placing multiple materials; a driving device is provided between the mounting seat 2 and the lifting arm 3, and the driving device controls the lifting arm 3 to move up and down on the mounting seat 2, and the hydraulic cylinder between the base 4 and the riveting head 5 controls the riveting head 5 to move up and down. During operation, the lifting arm 3 moves downward so that the base 4 reaches a specified height, and the riveting head 5 is impacted downward by the hydraulic cylinder to complete the riveting operation. A plurality of material troughs are provided on the material tray 9, and the material troughs match the materials. Before processing, the staff puts a plurality of materials side by side in the material tray 9, and the riveting head 5 matches the material tray 9. Multiple materials in the material tray 9 can be riveted at one time, which improves work efficiency.

[0037] Furthermore, the feeding assembly 6 is used to circulate the material tray 9 to the riveting station; the feeding assembly 6 includes a cross bar 61, which is connected to the lifting arm 3, and the end of the cross bar 61 away from the lifting arm 3 is hinged with a connecting rod 62, and a sliding rod 63 is slidably connected on the operating table 1. The sliding rod 63 is hinged to the end of the connecting rod 62 away from the lifting arm 3. When the cross bar 61 moves downward, the sliding rod 63 is driven to move backward through the connecting rod 62. When the cross bar 61 moves upward, the sliding rod 63 is driven to move forward through the connecting rod 62. The end of the sliding rod 63 away from the connecting rod 62 is hinged with a dial rod 66, and a rotating shaft 64 is rotatably connected to the operating table 1. The top of the rotating shaft 64 is connected to four supporting plates 67, and the bottom of the rotating shaft 64 is connected to a windmill wheel 65. The four supporting plates 6 7 are all located above the operating table 1, and the four supporting plates 67 are arranged in a circular array. The windmill wheel 65 is located below the operating table 1. Four arc corners are set on the windmill wheel 65. The driving rod 66 contacts one of the arc corners during the movement. A limit rod is set between the driving rod 66 and the slide bar 63. The limit rod between the driving rod 66 and the slide bar 63 limits the driving rod 66 so that the driving rod 66 can only swing backward and cannot swing forward. A spring is set between the driving rod 66 and the slide bar 63. During a back and forth reciprocating motion, the driving rod 66 can drive the rotating shaft 64 to rotate ninety degrees counterclockwise through the windmill wheel 65. The rotating shaft 64 drives multiple supporting plates 67 to rotate ninety degrees, so that the four supporting plates 67 cyclically exchange positions to achieve the effect of automatic feeding.

[0038] Furthermore, a mounting frame 68 is installed on the operating table 1, and a material rack 69 is installed on the mounting frame 68. A plurality of material trays 9 are stacked in the material rack 69. The side of the mounting frame 68 close to the rotating shaft 64 is connected to a door-shaped frame 611 through a spring. The side of the door-shaped frame 611 close to the rotating shaft 64 is connected to an arc block 612. The top of the support plate 67 is connected to a dial shaft 610. The dial shaft 610 contacts the arc block 612 during movement. The front and rear sides of the mounting frame 68 are respectively connected to side plates 613. The bottom of the side plate 613 is slidably connected to a gasket 614. The side plate 613 is connected to a rebound frame 6 15. A plurality of springs are provided between the rebound frame 615 and the gasket 614. The two gaskets 614 respectively pass through the front and rear sides of the mounting frame 68. The bottom surface of the gasket 614 and the bottom surface of the mounting frame 68 are located in the same plane. The ends of the two gaskets 614 close to each other are both chamfered. When the support plate 67 moves, it passes under the mounting frame 68. The distance between the top surface of the support plate 67 and the bottom surface of the mounting frame 68 is equal to the thickness of the material tray 9. The gasket 614 is provided with an inclined surface. The two gaskets 614 are mirrored. The two ends of the door frame 611 are respectively provided with inclined surfaces. The two inclined surfaces of the door frame 611 The two gaskets 614 are in sliding contact with the inclined surfaces of the two gaskets 614 respectively. The dial shaft 610 drives the door frame 611 to move to the left through the arc block 612 during the movement. When the inclined surfaces at both ends of the door frame 611 move to the left, they slide against the inclined surfaces of the two gaskets 614, causing the two gaskets 614 to move away from each other. Whenever a support plate 67 moves below the mounting frame 68, the two gaskets 614 can separate, allowing a material tray 9 to fall onto the support plate 67. When the support plate 67 leaves the range below the mounting frame 68, the two gaskets 614 approach each other, which presses the material in the mounting frame 68 and the material rack 69. The tray 9 is lifted to temporarily prevent the tray 9 from falling; through the setting of the loading component 6, the staff can place multiple trays 9 into the material rack 69 at a time, and the two gaskets 614 automatically separate when the support plate 67 moves to the bottom, so that one tray 9 falls onto the support plate 67. After the support plate 67 leaves, the two gaskets 614 automatically approach to lift the remaining trays 9. The four support plates 67 transport the trays 9 in turn to the bottom of the riveting head 5 for riveting operations through cyclic rotation, achieving the effect of automatic cyclic feeding, reducing the steps of manual operation, and improving work efficiency and safety.

[0039] In addition, the unloading component 7 is used for automatic unloading. The unloading component 7 includes a material box 72, which is connected to the operating table 1. The outer wall of the material box 72 near the mounting frame 68 is connected to a stop rod 71, and the inner wall of the material box 72 is provided with a slide 73. The inner wall of the material box 72 is slidably connected to a movable plate 74. The support plate 67 passes under the stop rod 71 when moving, and the movable plate 74 is located under the slide 73. The material tray 9 falls into the slide 73, and the material tray 9 slides along the slide 73 onto the movable plate 74. A plurality of constant force springs are provided between the movable plate 74 and the bottom inner wall of the material box 72. The material tray 9 falls into the material box 72 in turn and stacks up layer by layer. The movable plate 7 As the weight above it increases, the multiple constant force springs below it contract accordingly, causing the movable plate 74 to automatically move downward as the number of material trays 9 above it increases, so that the landing point of the material trays 9 always remains close to the bottom of the slide 73, preventing the material trays 9 from being damaged. The rear side of the material box 72 can be opened, and after opening, the staff can take out the stacked material trays 9. The setting of the movable plate 74 allows the movable plate 74 to automatically move downward as the number of material trays 9 above it increases, so that the landing point of the material trays 9 sliding down the slide 73 always remains at a higher position, shortening the falling distance of the material trays 9 and preventing the material trays 9 from being damaged due to excessive falling distance.

[0040] It is worth noting that the clamping assembly 8 is used to clamp the material tray 9. The clamping assembly 8 includes four connecting blocks 81, which are respectively mounted on the bottom of the four supporting plates 67 through springs. The supporting plates 67 are provided with four through slots. The top surface of the connecting block 81 is connected to four clamping blocks 82. The four clamping blocks 82 are respectively slidably connected to the four through slots of the supporting plates 67. The side of the connecting block 81 close to the rotating shaft 64 is connected to a sliding shaft 83. The outer wall of the rotating shaft 64 is connected to a curved ring 84. The four sliding shafts 83 are in sliding contact with the top surface of the curved ring 84. Two planes and two arc surfaces are provided on the ring 84. The two arc surfaces are located between the two planes. The two planes are set as one high and one low. The higher plane is close to the right-angle frame 85 and the mounting seat 2, and the lower plane is close to the mounting frame 68 and the material box 72. A right-angle frame 85 is installed on the operating table 1. Two pressure blocks 86 are installed on the right-angle frame 85 through a spring. The support plate 67 passes under the pressure block 86 during movement. The top of the clamping block 82 is set to be chamfered. The chamfered upward movement of the four clamping blocks 82 can straighten the material tray 9, and the pressure of the two pressure blocks 86 can avoid The free material tray 9 is separated from the surface of the support plate 67. When the four clamping blocks 82 are raised into position, the four clamping blocks 82 are close to the four sides of the material tray 9 to achieve stable clamping of the material tray 9. When the support plate 67 moves under the right-angle frame 85 and the riveting head 5, the four clamping blocks 82 maintain the clamping state of the material tray 9. When the support plate 67 moves under the stop bar 71 and the mounting bracket 68, the four clamping blocks 82 move down and shrink, and do not clamp the material tray 9. Through the setting of the clamping assembly 8, the four clamping blocks 82 can be automatically raised before the riveting operation is about to begin, and the support plate 67 can be automatically clamped. The material tray 9 on the plate 67 is clamped stably to maintain stability during the riveting operation. After the riveting operation is completed, the four clamping blocks 82 automatically move down to disengage the material tray 9 from the clamping, so that the material tray 9 can be unloaded smoothly without affecting the next material tray 9 being placed on the support plate 67; through the cooperation of the four clamping blocks 82 and the two pressing blocks 86, the four clamping blocks 82 can center the material tray 9 through their own chamfers when moving up, and also play a role in centering while clamping, avoiding affecting the operation quality due to the displacement of the material tray 9 during the riveting operation.

[0041] With the above structure, the working principle of this case is that a driving device is provided between the mounting base 2 and the lifting arm 3, the driving device controls the lifting arm 3 to move up and down on the mounting base 2, and the hydraulic cylinder between the machine base 4 and the riveting head 5 controls the riveting head 5 to move up and down. During operation, the lifting arm 3 moves down, so that the machine base 4 reaches the specified height, and the riveting head 5 is impacted downward by the hydraulic cylinder to complete the riveting operation. A plurality of material troughs are provided on the material tray 9, and the material troughs match the materials. Before processing, the staff puts a plurality of materials side by side in the material tray 9, and the riveting head 5 matches the material tray 9, so that a plurality of materials in the material tray 9 can be riveted at one time, which improves work efficiency. The material tray 9 is stacked in the material rack 69 and the mounting rack 68, and the lowest material tray 9 falls on the pallet 6 below the mounting rack 68. 7, before the first riveting, the staff manually placed a material tray 9 on the support plate 67 under the pressure block 86, so that the material tray 9 is clamped between the four clamping blocks 82, and then the lifting arm 3 moves down. When the lifting arm 3 moves up and down, it drives the cross bar 61 to move up and down synchronously. When the cross bar 61 moves down, it drives the slide bar 63 to move backward through the connecting rod 62. When the cross bar 61 moves upward, it drives the slide bar 63 to move forward through the connecting rod 62. When the slide bar 63 moves back and forth, it drives the lever 66 to move back and forth synchronously. When the lever 66 moves backward, it contacts one of the arc angles of the windmill wheel 65. Because the limit rod between the lever 66 and the slide bar 63 limits the lever 66, the lever 66 can only swing backward and cannot swing forward. Therefore, when the lever 66 moves backward and contacts the arc angle, The lever 66 cannot swing, so that the lever 66 drives the windmill wheel 65 to rotate counterclockwise through the arc angle. When the windmill wheel 65 rotates to ninety degrees, the arc angle is out of contact with the lever 66. When the lever 66 moves forward, the lever 66 contacts the next arc angle. At this time, the lever 66 is subjected to the reverse thrust of the arc angle and swings backward. At this time, the windmill wheel 65 does not rotate. After the lever 66 is out of contact with the arc angle, the lever 66 is reset by the elastic force of the spring, and the lever 66 repeats the above steps during the next backward movement. Therefore, the lever 66 can drive the rotating shaft 64 to rotate ninety degrees counterclockwise through the windmill wheel 65 during a back and forth motion. The rotating shaft 64 drives multiple supporting plates 67 to rotate ninety degrees, so that the four supporting plates 67 cycle After exchanging positions, the support plate 67 just located under the pressure block 86 moves to the bottom of the riveting head 5. After the riveting head 5 reaches the specified height, it impacts downward to perform the riveting operation. After the riveting is completed, the lifting arm 3 performs an up and down reciprocating movement, and the four support plates 67 rotate ninety degrees again. The next support plate 67 moves to the bottom of the riveting head 5 to perform the riveting operation. The riveted material tray 9 follows the support plate 67 to move to the top of the slide 73. At this time, the left side of the material tray 9 is against the baffle 71. When the support plate 67 moves next time, the baffle 71 blocks the movement of the material tray 9, and the support plate 67 continues to move. When the support plate 67 is separated from the bottom of the material tray 9, the material tray 9 falls into the slide 73, and the material tray 9 slides along the slide 73 to the movable plate 74. The material trays 9 fall into the material box 72 layer by layer.The cam 73 is pressed against the bottom of the chute 73 to release the loaded material from the chute 72, and the cam 73 is pressed against the bottom of the chute 73 to release the loaded material from the chute 72.

[0042] When there is no support plate 67 below the mounting frame 68, the two gaskets 614 are located at the bottom of the lowest material tray 9 in the mounting frame 68. The two gaskets 614 lift the mounting frame 68 and the stack of material trays 9 in the material rack 69 to prevent the material trays 9 from falling. When the support plate 67 moves to the range below the mounting frame 68, the dial shaft 610 on the support plate 67 contacts the arc block 612. The dial shaft 610 slides on the surface of the arc block 612 during the movement and drives the door frame 611 to move to the left through the arc block 612. When the inclined surfaces at both ends of the door frame 611 move to the left, they slide against the inclined surfaces of the two gaskets 614, so that the two inclined surfaces of the door frame 611 respectively drive the two inclined surfaces of the door frame 611 through the inclined surfaces of the two gaskets 614. The two gaskets 614 move in the direction away from each other, and the side plate 613 plays a role in installing and limiting the gasket 614. When the support plate 67 moves to the bottom of the material rack 69, the door frame 611 moves to the left and the two gaskets 614 are also separated and in place. The two gaskets 614 do not contact the bottom of the material tray 9. A stack of material trays 9 falls by gravity, and the bottom material tray 9 falls on the support plate 67. The distance between the top surface of the support plate 67 and the bottom surface of the mounting frame 68 is equal to the thickness of the material tray 9. There is a large friction between the support plate 67 and the material tray 9. The support plate 67 drives the material tray 9 to rotate synchronously when it rotates next time. At the same time, the dial shaft 610 gradually disengages from the arc block 612, and the door frame 611 is elastic through the spring When the two gaskets 614 are reset, they are reset by the elastic force of multiple springs on the two rebound frames 615. At this time, the two gaskets 614 are located between the two material trays 9. When the two gaskets 614 are close to each other, they are inserted between the two material trays 9 through chamfering, and the material trays 9 in the mounting frame 68 and the material rack 69 are lifted again. When the support plate 67 carries the material tray 9 above it and leaves the range below the mounting frame 68, the two gaskets 614 remain in the lifting state. When the next support plate 67 enters the range below the mounting frame 68, the above steps are repeated. Therefore, every time a support plate 67 moves to the bottom of the mounting frame 68, the two gaskets 614 can be separated, so that a material tray 9 falls onto the support plate 67. When the support plate 67 leaves the mounting frame When the tray 9 is in the range below the rack 68, the two gaskets 614 approach each other, lift the material tray 9 in the mounting frame 68 and the material rack 69, and temporarily prevent the material tray 9 from falling; through the setting of the loading assembly 6, the staff can place multiple material trays 9 into the material rack 69 at a time, and the two gaskets 614 automatically separate when the support plate 67 moves to the bottom, so that one material tray 9 falls onto the support plate 67. After the support plate 67 leaves, the two gaskets 614 automatically approach to lift the remaining material trays 9, and the four support plates 67 transport the material trays 9 in turn to the bottom of the riveting head 5 for riveting operations through a cyclic rotation, thereby achieving the effect of automatic cyclic feeding, reducing the steps of manual operation, and improving work efficiency and safety.

[0043] When the support plate 67 moves, it drives the four clamping blocks 82 and the connecting block 81 connected thereto to move synchronously, and the connecting block 81 drives the sliding shaft 83 to move synchronously. Therefore, the four sliding shafts 83 roll on the arc ring 84 at the same time. The arc ring 84 is provided with two planes and two arc surfaces. The two arc surfaces are located between the two planes. The two planes are set as one high and one low. The higher plane is close to the right-angle frame 85 and the mounting seat 2, and the lower plane is close to the mounting frame 68 and the material box 72. When the connecting block 81 is about to move to the bottom of the right-angle frame 85, the sliding shaft 83 rolls from the lower plane on the arc ring 84 through the arc surface to the higher plane. In this process, the sliding shaft 83 drives the connecting block 81 to move upward, and the connecting block 81 drives the four clamping blocks 82 to move upward. The clamping blocks 82 themselves have a certain elasticity. After the four clamping blocks 82 move up, they fit the four sides of the material tray 9 and play a role in positioning and clamping the material tray 9. After the material tray 9 is riveted, when the support plate 67 is about to move under the stop rod 71, the sliding shaft 83 rolls from the higher plane of the arc ring 84 through the arc surface to the lower plane. In this process, the sliding shaft 83 drives the connecting block 81 and the four clamping blocks 82 to move down, and the four clamping blocks 82 shrink into the four through grooves of the support plate 67. When the support plate 67 passes under the stop rod 71 and the mounting bracket 68, the four clamping blocks 82 do not hinder the movement of the material tray 9. Therefore, when the support plate 67 moves under the right-angle bracket 85 and the riveted head 5, the four clamping blocks 82 maintain the clamping state of the material tray 9. When the support plate 67 is When the blocking rod 71 and the bottom of the mounting bracket 68 move, the four clamping blocks 82 move down and shrink, and no longer clamp the material tray 9. When the support plate 67 moves to the bottom of the right-angle bracket 85, the two pressing blocks 86 contact the material tray 9 and apply pressure to the material tray 9 through the elastic force of the spring. During this process, the four clamping blocks 82 move up, and the four chamfers of the four clamping blocks 82 slide in contact with the four sides of the material tray 9, and the two pressing blocks 86 apply downward pressure to the material tray 9. When the material tray 9 shifts during the previous movement, the chamfers of the four clamping blocks 82 can straighten the material tray 9 during the upward movement, and the pressure of the two pressing blocks 86 can prevent the material tray 9 from separating from the surface of the support plate 67. When the four clamping blocks 82 are raised into place, the four clamping blocks 82 are close to the four sides of the material tray 9, thereby achieving the material tray 9. Stable clamping, the four clamping blocks 82 do not contact the two pressing blocks 86 when they move; through the setting of the clamping assembly 8, the four clamping blocks 82 can automatically rise before the riveting operation is about to begin, clamp the material tray 9 on the support plate 67 stably, and maintain stability during the riveting operation. After the riveting operation is completed, the four clamping blocks 82 automatically move down to disengage the material tray 9 from the clamping, so that the material tray 9 can be unloaded smoothly without affecting the next material tray 9 being placed on the support plate 67; through the cooperation of the four clamping blocks 82 and the two pressing blocks 86, the four clamping blocks 82 can center the material tray 9 through their own chamfers when moving up, and while clamping, they also play a centering role, avoiding the displacement of the material tray 9 during the riveting operation and affecting the operation quality.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A multi-station rotary riveting machine, comprising an operating table (1), characterized in that: The operating table (1) is provided with a mounting seat (2), a lifting arm (3) is slidably mounted on the mounting seat (2), a machine base (4) is mounted on the lifting arm (3), and the bottom of the machine base (4) is connected to a rivet joint (5) via a hydraulic cylinder; Also included is a material tray (9) for placing a plurality of materials; A feeding assembly (6) for cyclically conveying the material tray (9) to the riveting station; A blanking component (7) for automatic blanking; A clamping assembly (8) for clamping the material tray (9); The loading assembly (6) includes a cross bar (61), the cross bar (61) is connected to the lifting arm (3), the end of the cross bar (61) away from the lifting arm (3) is hinged to a connecting rod (62), the operating platform (1) is slidably connected with a slide bar (63), the slide bar (63) is hinged to the end of the connecting rod (62) away from the lifting arm (3), the end of the slide bar (63) away from the connecting rod (62) is hinged to a shifting rod (66), the operating platform (1) is rotatably connected with a rotating shaft (64), the top of the rotating shaft (64) is connected to four supporting plates (67), and the bottom of the rotating shaft (64) is connected to a windmill wheel (65); The operating table (1) is provided with a mounting frame (68), a material rack (69) is provided on the mounting frame (68), a plurality of material trays (9) are stacked in the material rack (69), a side of the mounting frame (68) close to the rotating shaft (64) is connected to a door-shaped frame (611) through a spring, a side of the door-shaped frame (611) close to the rotating shaft (64) is connected to an arc surface block (612), a top of the support plate (67) is connected to a shifting shaft (610), the shifting shaft (610) contacts the arc surface block (612) during movement, the front and rear sides of the mounting frame (68) are respectively connected to side plates (613), the bottom of the side plates (613) is slidably connected to a gasket (614), a rebound frame (615) is connected to the side plates (613), and a plurality of springs are provided between the rebound frame (615) and the gasket (614); The gasket (614) is provided with an inclined surface, and the two gaskets (614) are arranged in a mirror image. Both ends of the door frame (611) are respectively provided with inclined surfaces, and the two inclined surfaces of the door frame (611) are in sliding contact with the inclined surfaces of the two gaskets (614).

2. The multi-station rotary riveting machine according to claim 1, characterized in that: The four supporting plates (67) are all located above the operating table (1), and the four supporting plates (67) are arranged in a circular array. The windmill wheel (65) is located below the operating table (1). Four arc corners are provided on the windmill wheel (65). The shifting rod (66) contacts one of the arc corners during movement. A limit rod is provided between the shifting rod (66) and the slide rod (63), and a spring is provided between the shifting rod (66) and the slide rod (63).

3. The multi-station rotary riveting machine according to claim 2, characterized in that: The two gaskets (614) respectively pass through the front and rear sides of the mounting frame (68), the bottom surface of the gasket (614) and the bottom surface of the mounting frame (68) are located in the same plane, and the ends of the two gaskets (614) close to each other are both chamfered, and the support plate (67) passes under the mounting frame (68) when moving.

4. The multi-station rotary riveting machine according to claim 3, characterized in that: The unloading assembly (7) includes a material box (72), which is connected to the operating table (1) through the outer wall of the material box (72) close to the mounting frame (68), and is connected to a blocking rod (71). The inner wall of the material box (72) is provided with a slideway (73), and the inner wall of the material box (72) is slidably connected to a movable plate (74).

5. The multi-station rotary riveting machine according to claim 4, characterized in that: The support plate (67) passes under the blocking rod (71) when moving, and the movable plate (74) is located under the slideway (73). A plurality of constant force springs are provided between the movable plate (74) and the bottom inner wall of the material box (72).

6. The multi-station rotary riveting machine according to claim 5, characterized in that: The clamping assembly (8) includes four connecting blocks (81), and the four connecting blocks (81) are respectively installed on the bottom of four supporting plates (67) through springs. Four through slots are provided on the supporting plates (67). The top surface of the connecting block (81) is connected to four clamping blocks (82), and the four clamping blocks (82) are respectively slidably connected to the four through slots of the supporting plates (67). The side of the connecting block (81) close to the rotating shaft (64) is connected to a sliding shaft (83), and the outer wall of the rotating shaft (64) is connected to an arc surface ring (84), and the four sliding shafts (83) are all in sliding contact with the top surface of the arc surface ring (84).

7. The multi-station rotary riveting machine according to claim 6, characterized in that: A right-angle frame (85) is installed on the operating table (1), and two pressure blocks (86) are installed on the right-angle frame (85) through springs. The support plate (67) passes under the pressure blocks (86) when moving, and the top of the clamping block (82) is set to be chamfered.

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