Quick self-centering device for rivet

Abstract

Rivets enter a riveting station one by one from a conveying channel, the self-centering device comprises a connecting rod assembly and a driving part connected with the connecting rod assembly, the connecting rod assembly is provided with a plurality of pushing ends distributed around the circumference of the riveting station, a centering area is formed among the pushing ends, and the driving part is connected with the driving part. The center line of the centering area is used as a positioning reference; the driving component is used for driving the multiple pushing end portions to be relatively folded or loosened, along with the relative folding of the multiple pushing end portions, the center line of the rivet located at the riveting station gradually coincides with the center line of the centering area, and the rivet is located among the multiple pushing end portions in the radial direction. According to the utility model, the centering area is formed among the plurality of pushing end parts, and under the transmission and pushing of the connecting rod assembly, rivets entering a riveting station can be riveted under the condition of rapid and automatic centering in the radial direction, so that the riveting position precision of the rivets on the side surface of a workpiece is effectively improved, and the product yield is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of riveting, and particularly relates to a rapid self-centering device for rivets. Background Art

[0002] A rivet is a nail-shaped object used to connect two parts (or components) with through holes and a cap at one end. In riveting, the parts to be riveted are connected by its own deformation or interference fit.

[0003] Currently, existing riveting equipment generally includes a rivet feeding device, a workpiece positioning device, a manipulator, and a stamping device. Among them, the rivet feeding device continuously supplies rivets, the workpiece positioning device positions the workpiece, then the manipulator grabs the rivet and moves it to align with the rivet hole on the workpiece, and finally the manipulator releases the rivet, and the stamping device presses the rivet into the rivet hole on the workpiece to complete the riveting connection of the workpiece.

[0004] However, in the actual production process, when stamping a rivet on the side of the workpiece, due to the lack of radial restraint of the rivet, it is easy to produce position deviation, which cannot meet the production requirements of products with high requirements for riveting position accuracy. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an improved rapid self-centering device for rivets.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A rapid self-centering device for rivets, the rivets enter the riveting station one by one through the self-feeding channel. The self-centering device includes a connecting rod assembly and a driving component connected to the connecting rod assembly. The connecting rod assembly has a plurality of pushing ends circumferentially distributed around the riveting station. A centering area is formed between the plurality of pushing ends, and the center line of the centering area is used as the positioning reference; the driving component is used to drive the plurality of pushing ends to relatively close or loosen. As the plurality of pushing ends relatively close, the center line of the rivet located at the riveting station gradually coincides with the center line of the centering area, and the rivet is positioned radially between the plurality of pushing ends.

[0008] According to a specific implementation and preferred aspect of the utility model, the plurality of pushing ends move relatively close or loosen synchronously, and the movement distances of each pushing end are equal. Here, it is convenient to achieve rapid clamping or loosening.

[0009] According to another specific implementation and preferred aspect of the utility model, there are two pushing ends, which are symmetrically arranged on the opposite sides of the riveting station, and each pushing end is arranged to reciprocate along the radial direction of the rivet.

[0010] Preferably, the end face of each pushing end is an arc surface matching the side wall of the rivet. Here, the deformation of the rivet is avoided to improve the riveting quality.

[0011] According to another specific implementation and preferred aspect of the present invention, the connecting rod assembly includes a first connecting rod group and a second connecting rod group respectively located on opposite sides of the riveting station and each having a pushing end, and a synchronizing rod connected between the first connecting rod group and the second connecting rod group. The driving component drives one of the first connecting rod group and the second connecting rod group, and the synchronizing rod synchronously drives the other one to move. Here, the synchronous movement of the two connecting rod groups is realized through the synchronizing rod, with a simple structure and stable transmission.

[0012] Preferably, the first connecting rod group includes a first connecting rod rotatably arranged around a first axis, a second connecting rod with a pushing end formed at one end, and a third connecting rod rotatably connected between the first connecting rod and the second connecting rod; the second connecting rod group includes a fourth connecting rod rotatably arranged around a second axis, a fifth connecting rod with a pushing end formed at one end, and a sixth connecting rod rotatably connected between the fourth connecting rod and the fifth connecting rod. The two ends of the synchronizing rod are respectively rotatably connected to the first connecting rod and the fourth connecting rod, and the driving component is used to drive the first connecting rod to rotate around the first axis. Here, the structure is simple and reliable, facilitating installation and implementation.

[0013] Preferably, the first connecting rod rotates around the first axis from the middle, and the driving component and the synchronizing rod are respectively connected to the two ends of the first connecting rod; an extension rod extending towards the riveting station is further formed on the first connecting rod, and one end of the third connecting rod is rotatably connected to the extension rod.

[0014] Furthermore, a connection module is fixedly provided at the corresponding end of the first connecting rod; the driving component adopts a cylinder and is located on one side of the first connecting rod, and the telescopic end of the cylinder is fixedly connected to the connection module; a limiting module is further provided on the other side of the first connecting rod. When the cylinder pushes the connection module and abuts against the limiting module, the center line of the rivet at the riveting station coincides with the center line of the centering area. Here, the maximum pushing distance of the cylinder is limited through the limiting module to prevent the pushing end from excessively squeezing the rivet and causing deformation.

[0015] Preferably, the fourth connecting rod is L-shaped, and the fourth connecting rod rotates around the second axis from the corner, and the sixth connecting rod and the synchronizing rod are respectively rotatably connected to the two ends of the fourth connecting rod.

[0016] In addition, the self-centering device further includes two guiding modules arranged on opposite sides of the riveting station. Each guiding module is formed with a guiding channel extending along the radial direction of the rivet, and the second connecting rod and the fifth connecting rod are respectively inserted into the corresponding guiding channels.

[0017] Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0018] When the prior art punches rivets into the side of a workpiece, it is easy to cause position deviation due to the lack of radial constraint on the rivet, and it is unable to meet the production requirements of products with high requirements on riveting position accuracy. The present application designs the structure of a rivet rapid self-centering device as a whole, and ingeniously solves the deficiencies and defects of the prior art. By adopting the self-centering device, in one riveting process, a single rivet enters the riveting station through the feed channel, and then the driving component drives the connecting rod assembly, so that the multiple pushing ends are quickly relatively retracted, thereby driving the center line of the rivet located at the riveting station to gradually coincide with the center line of the centering area formed between the multiple pushing ends, so that the rivet can finally be positioned and constrained between the multiple pushing ends in the radial direction. After the riveting is completed, the driving component drives the multiple pushing ends to be relatively loosened, and the above steps are repeated to perform self-centering and riveting of the next rivet. Therefore, compared with the prior art, the utility model forms a centering area between multiple pushing ends, and under the transmission and pushing of the connecting rod assembly, the rivets entering the riveting station can be quickly and automatically centered in the radial direction to complete the riveting, effectively improving the riveting position accuracy of the rivets on the side of the workpiece, thereby improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the rivet rapid self-centering device of the utility model;

[0021] Figure 2 It is a front view schematic diagram of the rivet rapid self-centering device of the utility model;

[0022] Figure 3 for Figure 2 A schematic front view of the middle connecting rod assembly;

[0023] Wherein: 1, connecting rod assembly; 11, first connecting rod group; 111, first connecting rod; g, extension rod; s 1, first axis; 112, second connecting rod; 113, third connecting rod; 12, second connecting rod group; 124, fourth connecting rod; s 2, second axis; 125, fifth connecting rod; 126, sixth connecting rod; 13, synchronization rod; b, top push end; q, centering area;

[0024] 2. Driving components; k 1. Connection module; k2. Limiting module;

[0025] 3. Guidance module; 30. Guidance channel;

[0026] T, material feeding channel; D, rivet; W, riveting station. DETAILED DESCRIPTION

[0027] To make the above objects, features, and advantages of the present application more apparent and understandable, the following describes the specific embodiments of the present application in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present application.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0030] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0032] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0033] As Figures 1 to 3 shown, the rapid self-centering device for rivets of this embodiment is used for the side surface of a workpiece and includes a connecting rod assembly 1 and a driving component 2 connected to the connecting rod assembly 1.

[0034] Specifically, a feeding channel T is arranged at the rear side of a riveting station W for side surface riveting of the workpiece. When the rivet D moves along the feeding channel T to be aligned with the riveting station W, under the push of a push rod, the rivet D enters the riveting station W one by one from the feeding channel T; the connecting rod assembly 1 includes a first connecting rod group 11 and a second connecting rod group 12 respectively located on opposite sides of the riveting station W and each having a pushing end b, and a synchronizing rod 13 connected between the first connecting rod group 11 and the second connecting rod group 12; the driving component 2 drives one of the first connecting rod group 11 and the second connecting rod group 12, and the synchronizing rod 13 synchronously drives the other one to move, so that the pushing ends b on the first connecting rod group 11 and the second connecting rod group 12 relatively close or loosen.

[0035] In this example, there are two pushing ends b and they are symmetrically arranged on opposite sides of the riveting station W. Among them, with the movement of the first connecting rod group 11 and the second connecting rod group 12, each pushing end b reciprocates along the radial direction of the rivet D; the two pushing ends b synchronously move relatively close or loosen, and the movement distances of each pushing end b are equal; the end face of each pushing end b is an arc surface matching the side wall of the rivet D; a centering area q is formed between the two pushing ends b, and with the center line of the centering area as the positioning reference, as the two pushing ends b relatively close, the center line of the rivet D located at the riveting station W gradually coincides with the center line of the centering area q, and the rivet D is radially positioned between the two pushing ends b; it should be particularly noted that the number of the pushing ends b can also be three or more and they are circumferentially distributed around the riveting station W.

[0036] For the convenience of implementation, an approximately quadrilateral space is formed among the first connecting rod group 11, the second connecting rod group 12 and the synchronizing rod 13, and the riveting station W is on the side edge of the quadrilateral opposite to the synchronizing rod 13.

[0037] In some specific embodiments, the first link group 11 includes a first link 111 rotatably arranged about a first axis s1, a second link 112 with a pushing end b formed at one end, and a third link 113 rotatably connected between the first link 111 and the second link 112; the second link group 12 includes a fourth link 124 rotatably arranged about a second axis s2, a fifth link 125 with a pushing end b formed at one end, and a sixth link 126 rotatably connected between the fourth link 124 and the fifth link 125. The synchronization rod 13 is rotatably connected to the first link 111 and the fourth link 124 at both ends respectively, and the driving component 2 is used to drive the first link 111 to rotate about the first axis s1.

[0038] Meanwhile, the first link 111 rotates about the first axis s1 from the middle, and the driving component 2 and the synchronization rod 13 are respectively connected to both ends of the first link 111; an extension rod g extending towards the riveting station W is also formed on the first link 111, and one end of the third link 113 is rotatably connected to the end of the extension rod g away from the first link 111; the fourth link 124 is L-shaped, and the fourth link 124 rotates about the second axis s2 from the corner, and the sixth link 126 and the synchronization rod 13 are respectively rotatably connected to both ends of the fourth link 124. That is to say, when the self-centering device of the present application is installed on the machine tool, the middle of the first link 111 is rotatably connected to the mold through a pivot with the first axis s1, and the fourth link 124 is rotatably connected to the mold through a pivot with the second axis s2 from the corner, realizing the positioning of the first link 111 and the fourth link 124 on the mold.

[0039] In this example, the driving component 2 uses a conventional cylinder and is located on one side of the first link 111; a connection module k1 is fixedly provided at the corresponding end of the first link 111, and the telescopic end of the cylinder is fixedly connected to the connection module k1; a limit module k2 is also provided on the other side of the first link 111. When the telescopic rod of the cylinder extends and pushes the connection module k1 to abut against the limit module k2, the first link 111 rotates counterclockwise about the first axis s1, and the two pushing ends b are relatively closed, and the center line of the rivet D at the riveting station W coincides with the center line of the centering area q; when the telescopic rod of the cylinder retracts and drives the first link 111 to rotate clockwise about the first axis s1, the two pushing ends b are relatively loosened.

[0040] In addition, the self-centering device of this embodiment further includes two guiding modules 3 arranged on opposite sides of the riveting station W. Each guiding module 3 is formed with a guiding channel 30 extending along the radial direction of the rivet D, and the second link 112 and the fifth link 125 are respectively inserted into the corresponding guiding channels 30 to realize the linear reciprocating motion of the second link 112 and the fifth link 125 along the radial direction of the rivet D.

[0041] In summary, by adopting this self-centering device, within a single riveting process, a single rivet enters the riveting station through the feeding channel, and then the driving component drives the connecting rod assembly, causing the multiple pushing ends to quickly converge relative to each other. As a result, the center line of the rivet located at the riveting station gradually coincides with the center line of the centering area formed between the multiple pushing ends. Finally, the rivet can be radially positioned and constrained between the multiple pushing ends. After the riveting is completed, the driving component drives the multiple pushing ends to loosen relative to each other, and the above steps are repeated to perform self-centering and riveting of the next rivet. Therefore, compared with the prior art, on the one hand, based on the formation of a centering area between the multiple pushing ends, and under the transmission and pushing of the connecting rod assembly, the rivet entering the riveting station can be quickly and automatically centered radially to complete riveting, effectively improving the riveting position accuracy of the rivet on the side of the workpiece, thereby increasing the product qualification rate; on the other hand, the synchronous rod is used to achieve the synchronous movement of the two connecting rod groups, with a simple structure and stable transmission; thirdly, the maximum pushing distance of the cylinder is limited by the limiting module to prevent the pushing ends from excessively squeezing the rivet and causing deformation; fourthly, the structure is simple and reliable, facilitating installation and implementation.

[0042] The above has described the present invention in detail, but the present invention is not limited to the above embodiments. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A rivet rapid self-centering device, in which rivets enter the riveting station one by one from the feeding channel, characterized in that: The self-centering device includes a connecting rod assembly and a driving component connected to the connecting rod assembly, wherein the connecting rod assembly has a plurality of pushing end portions distributed circumferentially around the riveting station, a centering area is formed between the plurality of pushing end portions, and the center line of the centering area is used as a positioning reference; the driving component is used to drive the plurality of pushing end portions to relatively retract or loosen, wherein as the plurality of pushing end portions relatively retract, the center line of the rivet located at the riveting station gradually coincides with the center line of the centering area, and the rivet is radially positioned between the plurality of pushing end portions.

2. The rivet rapid self-centering device according to claim 1, characterized in that: The plurality of pushing end portions move synchronously in a relatively retracted or loosened manner, and the movement distances of the pushing end portions are equal.

3. The rivet rapid self-centering device according to claim 1, characterized in that: There are two pushing end portions which are symmetrically arranged on opposite sides of the riveting station, wherein each of the pushing end portions is arranged to reciprocate along the radial direction of the rivet.

4. The rivet rapid self-centering device according to claim 1 or 3, characterized in that: The end surface of each of the pushing ends is a curved surface matching the side wall of the rivet.

5. The rivet rapid self-centering device according to claim 1, characterized in that: The connecting rod assembly includes a first connecting rod group and a second connecting rod group respectively located on opposite sides of the riveting station and respectively having the pushing end portions, and a synchronization rod connected between the first connecting rod group and the second connecting rod group. The driving component drives one of the first connecting rod group and the second connecting rod group, and the synchronization rod synchronously drives the other of the two to move.

6. The rivet rapid self-centering device according to claim 5, characterized in that: The first connecting rod group includes a first connecting rod rotatably arranged around a first axis, a second connecting rod with one end forming the pushing end, and a third connecting rod rotatably connected between the first connecting rod and the second connecting rod; the second connecting rod group includes a fourth connecting rod rotatably arranged around a second axis, a fifth connecting rod with one end forming the pushing end, and a sixth connecting rod rotatably connected between the fourth connecting rod and the fifth connecting rod, wherein the two ends of the synchronization rod are rotatably connected to the first connecting rod and the fourth connecting rod respectively, and the driving component is used to drive the first connecting rod to rotate around the first axis.

7. The rivet rapid self-centering device according to claim 6, characterized in that: The first connecting rod rotates around the first axis from the middle, and the driving component and the synchronization rod are respectively connected to the two ends of the first connecting rod; an extension rod extending toward the riveting station is also formed on the first connecting rod, and one end of the third connecting rod is rotatably connected to the extension rod.

8. The rivet rapid self-centering device according to claim 7, characterized in that: A connecting module is fixedly provided at the corresponding end of the first connecting rod; the driving component adopts a cylinder and is located on one side of the first connecting rod, wherein the telescopic end of the cylinder is fixedly connected to the connecting module; a limiting module is also provided on the other side of the first connecting rod, and when the cylinder pushes the connecting module and abuts against the limiting module, the center line of the rivet located at the riveting station coincides with the center line of the centering area.

9. The rivet rapid self-centering device according to claim 6 or 7, characterized in that: The fourth connecting rod is L-shaped, wherein the fourth connecting rod rotates around the second axis from the corner, and the sixth connecting rod and the synchronous rod are respectively rotatably connected to the two ends of the fourth connecting rod.

10. The rivet rapid self-centering device according to claim 6, characterized in that: The self-centering device also includes two guide modules arranged on opposite sides of the riveting station, wherein each of the guide modules is formed with a guide channel extending radially along the rivet, and the second connecting rod and the fifth connecting rod are respectively inserted into the corresponding guide channels.

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