Automatic assembly device for rivets
Patent Information
- Application Number
- CN202522432824.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-17
AI Technical Summary
不过，由于钉杆的杆部直径小于钉套的外径，多数转盘上对钉杆的最小支撑半径不能自适应变化，可能导致顶杆组件出现顶偏的情况，影响钉杆与钉套的装配效率
本实用新型提供的拉铆钉自动装配装置，弹性弧形箍板用于提高钉杆和钉套在钉杆转盘和钉套转盘上的稳定性，弹性夹持爪上的第二支撑槽为钉杆进入钉杆转盘上的直接支撑结构，用于提高钉杆与钉套的对中精准度，降低出现顶偏的概率；顶杆机构将钉杆与钉套装配的最后阶段，弹性夹持爪可让出一定的余量，有利于钉杆与钉套充分组合，有利于提高钉杆与钉套的装配效率。
Smart Images
Figure CN224927384U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of rivet production and processing equipment, and in particular relates to an automatic rivet assembly device. Background Technology
[0002] Blind rivets, also known as pop rivets, are a common type of fastener. A blind rivet mainly consists of two parts: a shank and a sleeve. One end of the shank has a pull ring, and the other end has a slightly larger diameter head. The sleeve is a hollow cylindrical structure. In the production process of blind rivets, the cold-forged shanks and sleeves are independently screened by different vibrating screening machines. Shanks and sleeves that meet the assembly requirements are then fed into an assembly machine, where the automatic assembly function enables automated assembly.
[0003] The basic structure of existing blind screw assembly machines includes a screw rod feeding hopper, a screw sleeve feeding hopper, a main shaft motor, a rotating shaft, a push rod assembly, a turntable system, and a discharge hopper. The main shaft motor drives the turntable system to rotate. The turntable system is equipped with a screw rod turntable and a screw sleeve turntable, which are used to receive materials from the screw rod feeding hopper and the screw sleeve feeding hopper, respectively. During continuous rotation, the push rod assembly loads the corresponding screw rod into the screw sleeve. However, because the diameter of the screw rod is smaller than the outer diameter of the screw sleeve, the minimum support radius for the screw rod on most turntables cannot adapt to change, which may cause the push rod assembly to deviate, affecting the assembly efficiency of the screw rod and screw sleeve. Utility Model Content
[0004] This utility model addresses the technical problems existing in the aforementioned combination machine by proposing a reasonably designed and highly efficient automatic rivet assembly device.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The automatic rivet assembly device provided by this utility model includes a machine body. A main spindle box and a tail box are provided on the top of the machine body. A chuck is provided on the power output side of the main spindle box. A rotating shaft is provided at the center of the chuck. A push rod mechanism and a turntable system are provided on the rotating shaft. The turntable system includes a rivet rod turntable and a rivet sleeve turntable. A rivet rod feed hopper and a rivet sleeve feed hopper are respectively provided above the rivet rod turntable and the rivet sleeve turntable. The rivet rod turntable includes a groove-shaped left disc body. A plurality of first support grooves are provided on the outer circumference of the left disc body in a circular array. A clamping opening is provided along the length direction of the first support groove, communicating with the interior of the left disc body. An elastic [mechanism / mechanism] is provided inside the clamping opening. The clamping claw has a second support groove at one end that corresponds axially to the first support groove, and the other end of the elastic clamping claw is connected to the inner end face of the left disc. The nail sleeve turntable includes a groove-shaped right disc. The outer circumference of the right disc has multiple third support grooves that correspond one-to-one with the first support grooves. The end of each third support groove has a fourth support groove with a diameter larger than that of the third support grooves. The right disc has a baffle at the end away from the left disc, and the baffle has multiple U-shaped openings that correspond one-to-one with the fourth support grooves. Both the nail rod turntable and the nail sleeve turntable have an elastic arc-shaped hoop on their outer sides. The top of the elastic arc-shaped hoop is a free end, and the bottom of the elastic arc-shaped hoop is connected to the machine body.
[0006] Preferably, the elastic gripper includes a first Z-shaped segment that mates with the gripping opening, and a second Z-shaped segment is provided at one end of the first Z-shaped segment facing the interior of the left disc body. The bottom of the second Z-shaped segment is provided with a straight plate segment that connects to the inner end face of the left disc body.
[0007] Preferably, the push rod mechanism includes a push rod turntable that is connected to the rotating shaft for transmission. The push rod turntable is provided with a plurality of stepped grooves arranged in a circular array. Push rod members are provided in the stepped grooves. One end of the push rod member faces the nail rod turntable, and the other end of the push rod member faces the spindle box. A cylindrical cam is provided on the end face of the spindle box. A guide support surface is provided on the cylindrical cam. The guide support surface is in support and cooperation with the other end of the push rod member.
[0008] Preferably, the top rod includes a core rod, one end of which is provided with a core sleeve. The core rod and the core sleeve are connected by screws. A pull rod is provided at the end of the core sleeve facing away from the core rod. A spring is provided on the outside of the pull rod. One end of the spring is in contact with a stepped groove. The other end of the spring is provided with a tail rod connected to the pull rod. A universal ball bearing is provided at the end of the tail rod, and the universal ball bearing is in contact with a guide support surface.
[0009] Preferably, a support base is provided on the outer side of the top rod turntable, and the support base is provided with a support light hole that cooperates with the top rod turntable.
[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows: The automatic rivet assembly device provided by this utility model features an elastic arc-shaped clamp plate to improve the stability of the rivet shank and rivet sleeve on the rivet shank turntable and rivet sleeve turntable. The second support groove on the elastic clamping claw is a direct support structure for the rivet shank entering the rivet shank turntable, which improves the alignment accuracy of the rivet shank and rivet sleeve and reduces the probability of misalignment. In the final stage of assembling the rivet shank and rivet sleeve by the push rod mechanism, the elastic clamping claw can provide a certain margin, which is conducive to the full combination of the rivet shank and rivet sleeve and improves the assembly efficiency of the rivet shank and rivet sleeve. Attached Figure Description
[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 A perspective view of the automatic rivet assembly device provided in the embodiment; Figure 2 A front view of the automatic rivet assembly device provided in the embodiment; Figure 3 A cross-sectional view of the automatic rivet assembly device provided in the embodiment; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 for Figure 4 Enlarged view of point C in the middle; Figure 7 A three-dimensional view of the elastic gripper; In the above figures: 1. Body; 2. Spindle box; 3. Tail box; 4. Chuck; 5. Shaft; 6. Push rod mechanism; 61. Push rod turntable; 62. Stepped groove; 63. Push rod component; 631. Core rod; 632. Core sleeve; 633. Tie rod; 634. Spring; 635. Tail rod; 636. Universal ball bearing; 64. Cylindrical cam; 65. Guide support surface; 7. Turntable system; 71. Pin rod turntable; 711. Left disc body; 712. First support 713. Support groove; 72. Clamping opening; 73. Nail sleeve turntable; 74. Right disc body; 75. Third support groove; 76. Fourth support groove; 77. Baffle; 78. U-shaped opening; 79. Elastic clamping claw; 70. Second support groove; 71. First Z-shaped section; 72. Second Z-shaped section; 73. Straight plate section; 8. Nail rod feed hopper; 9. Nail sleeve feed hopper; 10. Elastic arc-shaped hoop plate; 11. Support seat; 12. Nail rod; 13. Nail sleeve. Detailed Implementation
[0013] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.
[0014] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.
[0015] Examples, such as Figures 1-7As shown, the automatic rivet assembly device provided by this utility model includes a machine body 1. A main spindle box 2 and a tail box 3 are arranged on the top of the machine body 1. A chuck 4 is arranged on the power output side of the main spindle box 2. A rotating shaft 5 is arranged at the center of the chuck 4. A push rod mechanism 6 and a turntable system 7 are arranged on the rotating shaft 5. The turntable system 7 includes a rivet rod turntable 71 and a rivet sleeve turntable 72. A rivet rod feed hopper 8 and a rivet sleeve feed hopper 9 are respectively arranged above the rivet rod turntable 71 and the rivet sleeve turntable 72. The main spindle box 2, tail box 3, chuck 4, and rotating shaft 5 are existing mature technologies and will not be described in detail in this embodiment. The spindle box 2 is equipped with a transmission mechanism and a reduction motor. The transmission mechanism is connected to the chuck 4. The chuck 4 clamps the rotating shaft 5, which can drive the entire turntable system 7 to produce continuous rotation. The cold-forged nail rods 12 and nail sleeves 13 are independently screened from different vibrating screening machines. The nail rods 12 and nail sleeves 13 that meet the assembly posture are screened and enter the nail rod feed hopper 8 and nail sleeve feed hopper 9 of the assembly machine. The nail rod turntable 71 and nail sleeve turntable 72 are used to receive materials from the nail rod 12 feed hopper and the nail sleeve 13 feed hopper.
[0016] Based on this, the nail bar turntable 71 provided by this utility model includes a groove-shaped left disc body 711. Multiple first support grooves 712 arranged in a circular array are provided on the outer circumferential surface of the left disc body 711. A clamping opening 713, communicating with the interior of the left disc body 711, is provided along the length direction of each first support groove 712. An elastic clamping claw 73 is provided inside the clamping opening 713. One end of the elastic clamping claw 73 is provided with a second support groove 731 corresponding axially to the first support groove 712. The other end of the elastic clamping claw 73 is connected to the inner end face of the left disc body 711. The nail sleeve turntable 72 includes a groove-shaped right disc body 721. Multiple third support grooves 722, corresponding one-to-one with the first support grooves 712, are provided on the outer circumferential surface of the right disc body 721. A fourth support groove 723 is provided at the end of each third support groove 722. The diameter of the support groove 723 is larger than the diameter of the third support groove 722. The right disc 721 is provided with a baffle 724 at the end away from the left disc 711. The baffle 724 is provided with multiple U-shaped openings 725 that correspond one-to-one with the fourth support groove 723. An elastic arc-shaped hoop 10 is provided on the outer side of both the nail rod turntable 71 and the nail sleeve turntable 72. The top end of the elastic arc-shaped hoop 10 is a free end, and the bottom end of the elastic arc-shaped hoop 10 is connected to the machine body 1. Locking sleeves connected to the rotating shaft 5 are provided on the left side of the left disc 711 and the right side of the right disc 721. The two locking sleeves are used to limit the axial position of the left disc 711 and the right disc 721 on the rotating shaft 5. The left disc 711 and the right disc 721 can be connected to the rotating shaft 5 synchronously to facilitate the rotating shaft 5 to drive the turntable system 7 to complete continuous rotation operation.
[0017] Specifically, the elastic arc-shaped hoop 10 adopts a C-shaped structure, and the arc length of its C-shape covers the path from contact to complete assembly of the rivet rod 12 and the rivet sleeve 13, which is used to improve the stability of the rivet rod 12 and the rivet sleeve 13 on the rivet rod turntable 71 and the rivet sleeve turntable 72; the end of the C-shaped path is connected to the discharge hopper, which makes it easy for the assembled rivets to slide away from the discharge hopper. For the turntable system 7, the groove structure design of the left disc 711 serves two purposes: firstly, it provides a structural foundation for the elastic clamping claw 73 to be installed inside it; secondly, it provides a first support groove 712 of sufficient length and ensures that the end of the elastic clamping claw 73 does not collide with the end face of the right disc 721 after it is engaged in the clamping opening 713. The diameter of the first support groove 712 is slightly larger than the diameter of the second support groove 731. The first support groove 712 can provide a reasonable moving surface for the head end of the rivet 12 during the final stage of full assembly of the rivet 12 and the rivet sleeve 13. The third support groove 722 engages with the main sleeve part of the rivet sleeve 13. The diameter of the fourth support groove 723 is larger than the diameter of the third support groove 722. The fourth support groove 723 is used to engage with the large end part of the rivet sleeve 13. The baffle 724 is used to prevent the rivet sleeve 13 from falling out of the rivet sleeve turntable when it is empty. The U-shaped opening 725 facilitates the complete removal of the assembled rivet from the turntable system 7. In this way, the second support groove 731 on the elastic clamping claw 73 is a direct support structure for the nail rod 12 to enter the nail rod turntable 71, which is used to ensure the alignment accuracy of the nail rod 12 and the nail sleeve 13 and reduce the probability of misalignment. In the final stage of the assembly of the nail rod 12 and the nail sleeve 13 by the push rod mechanism 6, the elastic clamping claw 73 deforms in the direction of the central axis of the left disk 711, which can give a certain margin, which is conducive to the full combination of the nail rod 12 and the nail sleeve 13 and improves the assembly efficiency of the nail rod 12 and the nail sleeve 13.
[0018] To improve the adaptive performance of the elastic gripper 73, the elastic gripper 73 provided by this utility model includes a first Z-shaped segment 732 that cooperates with the gripping opening 713. The first Z-shaped segment 732 has a second Z-shaped segment 733 at one end facing the interior of the left disc body 711. The bottom of the second Z-shaped segment 733 has a straight plate segment 734 that connects to the inner end face of the left disc body 711. The middle part of the first Z-shaped segment 732 is inclined, which is used to connect the first support groove 712, so that the head of the rivet rod 12 being pushed can apply pressure to the elastic clamping claw 73 along the inclined surface. The straight plate segment 734 is set close to the center of the left disc body 711 and is connected to the left disc body 711 by welding. The straight plate segment 734, the second Z-shaped segment 733 and the first Z-shaped segment 732 provide sufficient radial span for the elastic clamping claw 73 as a whole, which lengthens the deformation radius of the elastic clamping claw 73. This is beneficial to ensure that the elastic clamping claw 73 has enough room to deform in the direction of the central axis of the left disc body 711 to meet the requirements of full assembly of the rivet rod 12 and the rivet sleeve 13. Therefore, the elastic clamping claw 73 has good self-adaptive performance in the automatic assembly action of the push rod mechanism 6, which can ensure the assembly quality of the rivet.
[0019] To improve the efficiency of continuous operation of the push rod mechanism 6, the push rod mechanism 6 provided by this utility model includes a push rod turntable 61 that is connected to the rotating shaft 5 for transmission. The push rod turntable 61 is provided with a plurality of stepped grooves 62 arranged in a circular array. Push rod members 63 are provided in the stepped grooves 62. One end of the push rod member 63 faces the nail rod turntable 71, and the other end of the push rod member 63 faces the main spindle box 2. A cylindrical cam 64 is provided on the end face of the main spindle box 2. A guide support surface 65 is provided on the cylindrical cam 64. The guide support surface 65 supports and cooperates with the other end of the push rod member 63. The top rod 63 rotates continuously with the rotation of the top rod turntable 61 and the rotating shaft 5. The end of the top rod 63 can form a continuous telescopic arc as it passes through the guide support surface 65. As the top rod 63 gradually extends out of the stepped groove 62, its end goes from pressing against the end of the nail rod 12 until it completely pushes the nail rod 12 into the nail sleeve 13, and finally returns to its original position. This telescopic change can complete the automatic combination of the nail rod 12 and the nail sleeve 13, and operate continuously and periodically.
[0020] Furthermore, the top rod 63 provided by this utility model includes a core rod 631, one end of which is provided with a core sleeve 632. The core rod 631 and the core sleeve 632 are connected by screws. The core sleeve 632 is provided with a pull rod 633 at the end facing away from the core rod 631. A spring 634 is provided on the outside of the pull rod 633. One end of the spring 634 is in contact with the stepped groove 62. The other end of the spring 634 is provided with a tail rod 635 connected to the pull rod 633. A universal ball bearing 636 is provided at the end of the tail rod 635. The universal ball bearing 636 is in contact with the guide support surface 65. The spring 634 is dynamically balanced in the center direction of the stepped groove 62 by the compression of the stepped groove 62 and the tail rod 635 at both ends, especially providing the restoring force for the push rod 63 after the ejection operation; the core sleeve 632 is integrally connected with the pull rod 633, and the joint between the core sleeve 632 and the pull rod 633 forms a shoulder, which is used to cooperate with the inner shoulder of the stepped groove 62 to limit the push rod 63 and prevent the push rod 63 from disengaging from the guide support surface 65 on the cylindrical cam 64; the guide support surface 65 includes two parts, one part is a guide plane perpendicular to the central axis of the cylindrical cam 64, and the other part is a guide surface that forms a smooth curve around the circumference of the cylindrical cam 64; the guide surface is used to contact the universal ball bearing 636 to form an extension thrust on the push rod 63, and the guide plane and the guide surface transition smoothly, so that the universal ball bearing 636 can be contacted after the push rod 63 retracts and the push rod 63 can be effectively transitioned to the guide surface afterwards. The universal ball bearing 636 has a self-rotating function, which helps to improve its performance of rotating on the guide support surface 65 as the push rod turntable 61 rotates, thereby ensuring the ejection efficiency of the cylindrical cam 64 on the push rod 63.
[0021] To improve the rotational balance of the top rod turntable 61, a support base 11 is provided on the outer side of the top rod turntable 61 provided by this utility model. The support base 11 is provided with support holes that cooperate with the top rod turntable 61. In this way, the support holes on the support base 11 can act as support bearings, which not only ensures the rotational quality of the top rod turntable 61, but also helps to reduce the shear force on the rotating shaft 5, and improves the continuous operation performance of the rotating shaft 5.
[0022] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.
Claims
1. An automatic rivet assembly device, comprising a machine body, a spindle box and a tail box being provided on the top of the machine body, a chuck being provided on the power output side of the spindle box, a rotating shaft being provided at the center of the chuck, a push rod mechanism and a turntable system being provided on the rotating shaft, the turntable system including a rivet rod turntable and a rivet sleeve turntable, and a rivet rod feed hopper and a rivet sleeve feed hopper being respectively provided above the rivet rod turntable and the rivet sleeve turntable, characterized in that, The nail rod turntable includes a groove-shaped left disc. Multiple first support grooves are arranged in a circular array on the outer circumference of the left disc. A clamping opening, penetrating the interior of the left disc, is provided along the length of each first support groove. An elastic clamping claw is provided inside the clamping opening. One end of the elastic clamping claw has a second support groove corresponding to the axial direction of the first support groove, and the other end of the elastic clamping claw is connected to the inner end face of the left disc. The nail sleeve turntable includes a groove-shaped right disc. Multiple third support grooves, each corresponding to one of the first support grooves, are provided on the outer circumference of the right disc. A fourth support groove, larger in diameter than the third support grooves, is provided at the end of each third support groove. A baffle is provided at the end of the right disc furthest from the left disc. Multiple U-shaped openings, each corresponding to one of the fourth support grooves, are provided on the baffle. An elastic arc-shaped hoop is provided on the outer side of both the nail rod turntable and the nail sleeve turntable. The top of the elastic arc-shaped hoop is a free end, and the bottom end of the elastic arc-shaped hoop is connected to the machine body.
2. The automatic rivet assembly device according to claim 1, characterized in that, The elastic gripper includes a first Z-shaped segment that mates with the gripping opening. The first Z-shaped segment has a second Z-shaped segment at one end facing the interior of the left disc. The bottom of the second Z-shaped segment has a straight plate segment that connects to the inner end face of the left disc.
3. The automatic rivet assembly device according to claim 2, characterized in that, The push rod mechanism includes a push rod turntable that is connected to the rotating shaft for transmission. The push rod turntable is provided with a plurality of stepped grooves arranged in a circular array. Push rod members are arranged in the stepped grooves. One end of the push rod member faces the nail rod turntable, and the other end of the push rod member faces the spindle box. A cylindrical cam is provided on the end face of the spindle box. A guide support surface is provided on the cylindrical cam. The guide support surface is in support and cooperation with the other end of the push rod member.
4. The automatic rivet assembly device according to claim 3, characterized in that, The top rod includes a core rod, one end of which is provided with a core sleeve. The core rod and the core sleeve are connected by screws. A pull rod is provided at the end of the core sleeve facing away from the core rod. A spring is provided on the outside of the pull rod. One end of the spring is in contact with a stepped groove. The other end of the spring is provided with a tail rod connected to the pull rod. A universal ball bearing is provided at the end of the tail rod. The universal ball bearing is in contact with a guide support surface.
5. The automatic rivet assembly device according to claim 4, characterized in that, A support base is provided on the outer side of the top rod turntable, and the support base is provided with a support light hole that cooperates with the top rod turntable.