Buffer type riveting mechanism

Abstract

The invention discloses a buffering type riveting mechanism which comprises a riveting rod arranged on a rack in a sliding mode through a sleeve and a driving device driving the riveting rod to stretch out and draw back, and an ejector rod connected between the driving device and the riveting rod and a buffering sleeve arranged on the ejector rod in a sliding and sleeving mode are arranged in the sleeve in a sliding mode. The end, close to the riveting rod, of the buffering sleeve protrudes out of the sleeve and is connected with a feeding device, the ejector rod is of a T-shaped shaft structure and comprises a sliding shaft and a first connecting shaft which are sequentially arranged, the first connecting shaft slidably penetrates through the buffering sleeve, and an elastic piece is arranged between the sliding shaft and the buffering sleeve. The buffering type riveting mechanism is compact in structure, the buffering sleeve connected to the feeding device abuts against the sliding shaft of the ejector rod through the elastic piece, namely, the buffering sleeve elastically abuts against the sliding shaft, the feeding device can be driven to be pre-pressed on a workpiece to be riveted before riveting, and the riveting precision is improved.

Description

Technical Field

[0001] The invention relates to the field of automated machinery, and in particular to a buffer type riveting mechanism. Background Art

[0002] The pressure riveting machine (also known as the riveting machine, rotary riveting machine, riveting machine, rolling riveting machine, etc.) is a new type of riveting equipment developed based on the principle of cold rolling, which refers to mechanical equipment that can rivet objects together with rivets. The existing riveting mechanism cannot pre-press the plate, causing the plate to deform, causing the rivet to deform in advance, and direct pressure will also damage the riveted workpiece. Summary of the invention

[0003] The object of the present invention is to provide a buffer type riveting mechanism to overcome the deficiencies in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An embodiment of the present invention discloses a buffered riveting mechanism, comprising a rivet rod slidably arranged on a frame through a sleeve and a driving device for driving the rivet rod to extend and retract, a push rod connected between the driving device and the rivet rod and a buffer sleeve slidably sleeved on the push rod are slidably arranged in the sleeve, one end of the buffer sleeve close to the rivet rod protrudes from the sleeve and is connected to a feeding device, the push rod is a hollow T-shaped shaft structure, comprising a sliding shaft and a first connecting shaft arranged in sequence, the first connecting shaft slides through the buffer sleeve, and an elastic member is arranged between the sliding shaft and the buffer sleeve.

[0006] Furthermore, in the above-mentioned buffer riveting mechanism, the elastic member is a plurality of disc springs slidably sleeved on the first connecting shaft.

[0007] Furthermore, in the above-mentioned buffer riveting mechanism, the buffer sleeve is a hollow T-shaped shaft structure, including an abutment shaft arranged close to the elastic member and a second connecting shaft arranged close to the rivet rod, and an abutment groove is arranged on the inner wall of one end of the abutment shaft close to the elastic member and is connected to the abutment sleeve.

[0008] Furthermore, in the above-mentioned buffer riveting mechanism, the inner wall of the abutment sleeve is slidably sleeved on the first connecting shaft, one end of the abutment sleeve is slidably disposed in the abutment groove, and the other end abuts against the elastic member through an abutment cap.

[0009] Furthermore, in the above-mentioned buffer riveting mechanism, the abutment cap is a cylindrical structure, and a stepped hole is provided at the center thereof, which is slidably sleeved on the first connecting shaft and the abutment sleeve respectively.

[0010] Furthermore, in the above-mentioned buffer riveting mechanism, the feeding device includes a feeding head connected to the buffer sleeve through a connecting head and an elbow connected to the feeding head, the feeding head is provided with a feeding channel and a riveting channel perpendicular to each other, the elbow is provided with a turning channel connected to the feeding channel, the rivet rod slides through the connecting head and the riveting channel, and the end of the elbow facing away from the feeding head is connected to the material pipe through a quick connector.

[0011] Furthermore, in the above-mentioned buffer riveting mechanism, a stop block is hinged on the top of the feeding channel, and clamping blocks are hinged on both sides of the feeding channel.

[0012] Furthermore, in the above-mentioned buffer riveting mechanism, a guiding inclined surface is provided on the side of the clamping block close to the stop block.

[0013] Furthermore, in the above-mentioned buffer riveting mechanism, the elbow includes a bottom plate processed with the turning channel and a cover plate sealed on the turning channel, and is plugged into the loading head through a connecting ring, and a locking ring is provided on the outer wall of the connecting ring.

[0014] Furthermore, in the above-mentioned buffer riveting mechanism, a guide tube is provided at one end of the feeding head away from the connecting head, and two oppositely arranged guide plates are provided in the guide tube. The distance between the adjacent side surfaces of the two guide plates gradually increases as they gradually move away from the feeding head, and an elastic ring is provided on the outer wall of the two guide plates away from the feeding head.

[0015] Compared with the prior art, the advantages of the present invention are: the buffer riveting mechanism described in the present invention has a compact structure, and the buffer sleeve connected to the feeding device is abutted against the sliding shaft of the push rod through an elastic member, that is, it is elastically abutted against the sliding shaft, which can drive the feeding device to pre-press the workpiece to be riveted before riveting, thereby improving the riveting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 Shown is a schematic structural diagram of a buffer riveting mechanism in a specific embodiment of the present invention.

[0018] Figure 2 The figure shows a schematic diagram of the connection among a driving device, a push rod, a buffer sleeve and a rivet rod in a specific embodiment of the present invention.

[0019] Figure 3 Shown is a cross-sectional view of a feeding device in a specific embodiment of the present invention.

[0020] Figure 4 Shown is an exploded schematic diagram of a connecting head and a feeding head in a specific embodiment of the present invention.

[0021] Figure 5 Shown is a schematic diagram of an exploded view of an elbow and a feeding head in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will describe the technical solutions in the embodiments of the present invention in detail in conjunction with the drawings 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.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Ginseng Figures 1 to 5 As shown, a buffered riveting mechanism includes a rivet rod 2 slidably set on a frame through a sleeve 1 and a driving device 3 for driving the rivet rod 2 to extend and retract. A push rod 4 connected between the driving device 3 and the rivet rod 2 and a buffer sleeve 5 slidably sleeved on the push rod 4 are slidably set in the sleeve 1. One end of the buffer sleeve 5 close to the rivet rod 2 protrudes from the sleeve 1 and is connected to a feeding device 6. The push rod 4 is a hollow T-axis structure, including a sliding shaft and a first connecting shaft arranged in sequence. The first connecting shaft slides through the buffer sleeve 5, and an elastic member 7 is arranged between the sliding shaft and the buffer sleeve 5.

[0026] In this technical solution, the frame is a C-shaped mounting frame formed by splicing or processing plates, etc., and is connected to a connecting plate for connecting an external manipulator and other devices to install the riveting mechanism as a whole. A concave die facing the rivet rod is also provided in the frame. After the sleeve passes through the corresponding position of the frame, it is fixed to the frame through the limiting boss and nut on its outer wall. The driving device uses a conventional servo electric cylinder or hydraulic cylinder, etc. The push rod is connected to the rivet rod through an adapter. A threaded hole is processed in the top end face of the sliding shaft close to the driving device, and is connected to the piston rod of the driving device. A conventional guide key is provided on the side of the sliding shaft, and cooperates with the guide groove on the inner wall of the sleeve to improve the accuracy of the movement of the push rod. The buffer sleeve is slidably arranged on the sleeve The cylinder is in contact with the bottom surface of the sliding shaft of the push rod through an elastic member. When the driving device drives the push rod and the rivet rod to extend, it drives the buffer sleeve and the feeding device to move together. After the feeding device abuts against the surface of the workpiece to be riveted, the buffer sleeve and the feeding device stop moving, and the push rod and the rivet rod continue to extend, and apply pressure to the workpiece to be riveted through the elastic member to pre-tighten the workpiece to be riveted to avoid riveting errors caused by displacement during the riveting process. The buffer riveting mechanism described in the present invention has a compact structure. The buffer sleeve connected to the feeding device abuts against the sliding shaft of the push rod through an elastic member, that is, it elastically abuts against the sliding shaft, which can drive the feeding device to pre-press the workpiece to be riveted before riveting, thereby improving the riveting accuracy.

[0027] For example, see Figure 1 and Figure 2 As shown, the elastic member 7 is a plurality of disc springs slidably sleeved on the first connecting shaft.

[0028] In this technical solution, the disc spring has excellent buffering and shock absorption capabilities, reducing problems such as matching errors between the rivet rod and the rivet that may be caused by vibration. In addition, the pre-tightening pressure value is adjusted by changing the number of disc springs to expand the scope of application.

[0029] For example, see Figure 2 As shown, the buffer sleeve 5 is a hollow T-shaped shaft structure, including an abutment shaft arranged close to the elastic member 7 and a second connecting shaft arranged close to the rivet rod 2. An abutment groove is arranged on the inner wall of one end of the abutment shaft close to the elastic member 7 and is connected to the abutment sleeve 8.

[0030] In this technical solution, a sleeve corresponding to the second connecting shaft is embedded in the inner wall of one end of the sleeve close to the rivet rod to improve the movement accuracy of the preload sleeve. The abutment sleeve is a tubular structure, one end of which is slidably set in the abutment groove and the other end abuts against the disc spring. Its length is set according to the number of disc springs to ensure the elastic connection between the push rod and the buffer sleeve.

[0031] For example, see Figure 2As shown, the inner wall of the abutting sleeve 8 is slidably sleeved on the first connecting shaft, one end of the abutting sleeve 8 is slidably set in the abutting groove, and the other end abuts against the elastic member 7 through the abutting cap 9.

[0032] In this technical solution, the outer diameter of the abutment cap is larger than the outer diameter of the disc spring, which increases the contact area between the abutment sleeve and the disc spring and ensures full utilization of the disc spring.

[0033] For example, see Figure 2 As shown, the abutment cap 9 is a cylindrical structure, and a stepped hole is provided at the center thereof, which is slidably sleeved on the first connecting shaft and the abutment sleeve 8 respectively.

[0034] In this technical solution, the two ends of the abutment sleeve are respectively arranged in the abutment groove and the step hole, and the coaxiality between the abutment sleeve and the push rod is improved by cooperating with the inner wall and the step hole of the buffer sleeve with the first connecting shaft, thereby avoiding friction between the abutment sleeve and the push rod caused by inclination of the abutment sleeve.

[0035] For example, see Figures 3 to 5 As shown, the feeding device 6 includes a feeding head 62 connected to the buffer sleeve 5 through a connecting head 61 and an elbow 63 connected to the feeding head 62. The feeding head 62 is provided with a feeding channel and a riveting channel perpendicular to each other. The elbow 63 is provided with a turning channel connected to the feeding channel. The rivet rod 2 slides through the connecting head 61 and the riveting channel. The end of the elbow 63 facing away from the feeding head 62 is connected to the material pipe 65 through a quick connector 64.

[0036] In this technical solution, the connector is fixed to the corresponding end of the buffer sleeve by conventional screws, etc., and a through hole connected to the riveting material channel is processed in the center. The feeding head includes a top cover and a bottom cover fixed to each other by screws, etc. The connector is plugged into the top cover and fixed by a positioning pin and a top screw perpendicular to its axial direction. The material pipe is an existing structure and is connected to an external vibration plate and a blowing device, etc. Rivets are provided for the feeding device. The rivets enter the elbow along the material pipe and are rotated at the elbow to the angle required for riveting. After entering the feeding head, they are pushed out by the rivet rod and riveted. One end of the elbow close to the quick connector is provided with a material pipe that can accommodate the material pipe. The base of the quick connector is connected to the connecting block by a threaded connection. The base is slidably connected with a release ring. A wedge ring is arranged inside the release ring. A through hole corresponding to the outer contour of the material tube is arranged inside the wedge ring, and a plurality of locking grooves are provided. The release ring and the wedge ring are in contact with each other through the conical surfaces. The wedge ring is released or squeezed by sliding the release ring to realize the rapid disassembly and assembly of the material tube. To ensure the strength of the material tube, the outer sleeve is arranged on the reinforcement tube, and the reinforcement tube is clamped on the release ring through the connecting joint. The side wall of the reinforcement tube is provided with an avoidance groove, and a proximity sensor is installed to sense the rivets in the material tube.

[0037] For example, see Figures 3 to 5As shown, a stop block 621 is hinged at the top of the feeding channel, and clamping blocks 622 are hinged at both sides of the feeding channel.

[0038] In this technical solution, the backstop block is hinged to the top cover by a conventional hinge pin, and a spring abutting against the backstop block is arranged in the top cover. When the rivet slides toward the riveting channel through the feeding channel, the backstop block is pushed open. After the rivet passes through, the backstop block is reset under the action of the spring to prevent the rivet from retreating; the end of the clamping block close to the elbow is hinged to the top cover and the bottom cover by a conventional hinge pin, and elastic materials such as rubber blocks and rubber pins are arranged between the side of the clamping block facing away from the feeding channel and the inner wall corresponding to the bottom cover; a positioning groove corresponding to the rivet is arranged on the inner wall of one end of the clamping block close to the riveting channel, and when the rivet enters the riveting channel, it is clamped by the two clamping blocks to prevent it from falling. During riveting, the rivet rod drives the rivet to push open the clamping block and complete the riveting. After the rivet rod is reset, the clamping block is reset under the action of the elastic material.

[0039] For example, see Figures 3 to 5 As shown, a guiding inclined surface is provided on the side of the clamping block 622 close to the stop block 621 .

[0040] In this technical solution, the rivet slides along the guiding inclined surface and pushes the stop block upward obliquely, thereby reducing the thrust required to push the stop block open and ensuring normal sliding and feeding of the rivet.

[0041] For example, see Figures 3 to 5 As shown, the elbow 63 includes a bottom plate processed with a turning channel and a cover plate covering the turning channel, and is plugged into the loading head 62 through a connecting ring 66 , and a locking ring 67 is sleeved on the outer wall of the connecting ring 66 .

[0042] In this technical solution, the outer contour of one end of the elbow close to the feeding head is a cylindrical structure, and a clamping boss is protruding. After the elbow is inserted into the connecting ring and the feeding head, the corresponding end of the connecting ring is clamped into the outer wall of the clamping boss to prevent it from rotating. After the connecting ring is inserted into the feeding head, it is fixed by a positioning pin perpendicular to its axial direction. The locking ring is connected to the outer wall of the connecting ring by means of threaded connection, etc., and is arranged in a clamping part that is clamped into the clamping boss. A steel ball seat is provided in the end face of the locking ring close to the feeding head, and a V-groove corresponding to the steel ball seat is provided in the corresponding side face of the feeding head. After the locking ring fixes the connecting ring and the elbow to the feeding head, the spring of the steel ball seat supports the steel ball and is clamped in the V-groove to prevent the locking ring from loosening, thereby improving the stability of the overall installation.

[0043] For example, see Figures 3 to 5 As shown, a guide cylinder 68 is provided at one end of the loading head 62 away from the connecting head 61, and two oppositely arranged guide plates 681 are provided in the guide cylinder 68. The distance between the adjacent side surfaces of the two guide plates 681 gradually increases as they gradually move away from the loading head 62, and an elastic ring 682 is provided on the outer wall of the two guide plates 681 away from the loading head 62.

[0044] In this technical solution, the guide tube is connected to the bottom cover of the loading head by means of a threaded connection, and is provided with a top screw to prevent loosening, and the top of the guide tube is spaced apart from the loading head to form an annular groove for accommodating the guide plate shoulder. The gap between the two guide plates gradually increases as they move away from the loading head. Before the rivet enters the guide tube, under the action of the elastic ring, the two guide plates are fitted together at one end away from the loading head, forming a through hole of a truncated cone structure inside. Even if the rivet falls off from the rivet rod, it will not fall out of the guide tube. When the rivet rod drives the rivet rod to move, it will gradually squeeze the inner wall of the guide plate, and the inner wall of the guide plate guides the rivet to prevent it from tilting. After the riveting is completed, the guide plate is reset under the action of the elastic ring.

[0045] To sum up, the buffer riveting mechanism described in the present invention has a compact structure. The buffer sleeve connected to the feeding device abuts against the sliding shaft of the push rod through an elastic member, that is, it elastically abuts against the sliding shaft, which can drive the feeding device to pre-press the workpiece to be riveted before riveting, thereby improving the riveting accuracy.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0047] The above description is only a specific implementation of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A buffer riveting mechanism, characterized in that: It includes a rivet rod slidably arranged on a frame through a sleeve and a driving device for driving the rivet rod to extend and retract. A push rod connected between the driving device and the rivet rod and a buffer sleeve slidably sleeved on the push rod are slidably arranged in the sleeve. One end of the buffer sleeve close to the rivet rod protrudes from the sleeve and is connected to a feeding device. The push rod is a hollow T-shaped shaft structure, including a sliding shaft and a first connecting shaft arranged in sequence. The first connecting shaft slides through the buffer sleeve, and an elastic member is arranged between the sliding shaft and the buffer sleeve.

2. The buffer riveting mechanism according to claim 1, characterized in that: The elastic members are a plurality of disc springs slidably sleeved on the first connecting shaft.

3. The buffer riveting mechanism according to claim 1, characterized in that: The buffer sleeve is a hollow T-shaped shaft structure, including an abutment shaft arranged close to the elastic member and a second connecting shaft arranged close to the rivet rod. An abutment groove is arranged on the inner wall of one end of the abutment shaft close to the elastic member and is connected to the abutment sleeve.

4. The buffer riveting mechanism according to claim 3, characterized in that: The inner wall of the abutting sleeve is slidably sleeved on the first connecting shaft, one end of the abutting sleeve is slidably arranged in the abutting groove, and the other end abuts against the elastic member through an abutting cap.

5. The buffer riveting mechanism according to claim 3, characterized in that: The abutment cap is a cylindrical structure, and a stepped hole is arranged at the center thereof, which is slidably sleeved on the first connecting shaft and the abutment sleeve respectively.

6. The buffer riveting mechanism according to claim 1, characterized in that: The feeding device includes a feeding head connected to the buffer sleeve through a connecting head and an elbow connected to the feeding head, the feeding head is provided with a feeding channel and a riveting channel perpendicular to each other, the elbow is provided with a turning channel connected to the feeding channel, the rivet rod slides through the connecting head and the riveting channel, and the end of the elbow facing away from the feeding head is connected to the material pipe through a quick connector.

7. The buffer riveting mechanism according to claim 6, characterized in that: The top end of the feeding channel is hinged with a stop block, and both sides of the feeding channel are hinged with clamping blocks.

8. The buffer riveting mechanism according to claim 7, characterized in that: A guiding inclined surface is arranged on the side of the clamping block close to the stop block.

9. The buffer riveting mechanism according to claim 6, characterized in that: The elbow comprises a bottom plate processed with the diverting channel and a cover plate sealed on the diverting channel, and is plugged into the loading head via a connecting ring, and a locking ring is sleeved on the outer wall of the connecting ring.

10. The buffer riveting mechanism according to claim 6, characterized in that: A guide cylinder is provided at one end of the feeding head away from the connecting head, and two oppositely arranged guide plates are provided in the guide cylinder. The distance between the adjacent side surfaces of the two guide plates gradually increases as they move away from the feeding head, and elastic rings are provided on the outer walls of the two guide plates away from the feeding head.

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