Rivet nut telescopic device

Abstract

A rivet nut telescopic device is used in cooperation with a rivet gun and comprises a pull rod, a lower pull sleeve, an upper pull sleeve, a sliding sleeve, a rivet rod and a spring. One end of the pull rod is connected with the hand riveter; the fixed end of the pull rod is arranged inside the pull-down sleeve, and the pull-down sleeve is clamped with the pull rod; the fixed end of the upper pull sleeve is arranged in the lower pull sleeve, and the interior of the upper pull sleeve communicates with the interior of the lower pull sleeve to form a sliding space; the sliding sleeve sleeves the peripheral side of the connecting end of the upper pull sleeve; the connecting end of the riveting rod is arranged in the sliding sleeve and the upper pulling sleeve; the spring is arranged in the hollow structure of the lower pull sleeve and the hollow structure of the upper pull sleeve, so that torque transmission and pull-up displacement are realized; through the arrangement, the whole structure is compact and simple, the occupied space is small, automatic layout is facilitated, the riveting rod is convenient to replace, the maintenance time is effectively shortened, the production efficiency is improved, and the technical problems that an air cylinder telescopic mode is adopted in a traditional automatic nut pulling and riveting mode, the occupied space of a mechanism is large, and multiple auxiliary parts are adopted are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of automated riveting, in particular to a rivet nut expansion and contraction device. Background Art

[0002] Automatic rivet nuts, also known as self-piercing rivet nuts, are a new type of fastener widely used in a variety of applications, including automotive, railway, marine, aviation, and electronic equipment. They consist of a ring-shaped rivet body and a threaded section. Their unique design automatically tightens the rivet body, securing it securely to the sheet metal. Compared to traditional nuts, automatic rivet nuts require no pre-drilling and utilize a self-piercing design, making installation easier. The operating principle of automatic rivet nuts is based on the interplay of threads and the automatic tightening of the rivet body. During installation, pressure is applied using a tool, such as a rivet gun, causing the rivet body to form a hole in the sheet metal and automatically tighten. Simultaneously, the threaded section engages the sheet metal, achieving a secure connection.

[0003] At present, traditional automatic rivet nuts use a cylinder extension method, which takes up a large space and has many auxiliary parts. Utility Model Content

[0004] In view of this, the present application provides a rivet nut telescopic device, which occupies a small space and is conducive to automated layout.

[0005] According to one aspect of the present application, a rivet nut expansion and contraction device is provided for use with a rivet gun, comprising a pull rod, a lower pull sleeve, an upper pull sleeve, a sliding sleeve, a rivet rod and a spring; the pull rod is a "T"-shaped structure, and one end of the pull rod is connected to the rivet gun; the lower pull sleeve is a hollow structure with openings at both ends, and the interior is an inverted "convex" shape, the fixed end of the pull rod is arranged inside the lower pull sleeve, and the lower pull sleeve is clamped with the pull rod; the upper pull sleeve is a hollow structure with openings at both ends, the fixed end of the upper pull sleeve is arranged inside the lower pull sleeve, the interior of the upper pull sleeve is connected to the interior of the lower pull sleeve, and there is a spring between the upper pull sleeve and the pull rod. A preset distance forms a sliding space; the sliding sleeve is a hollow structure with openings at both ends, the sliding sleeve is arranged on the outer peripheral side of the connecting end of the upper pull sleeve, and a preset distance is provided between the lower end of the sliding sleeve and the upper end of the lower pull sleeve; the rivet rod passes through the sliding sleeve, and the connecting end of the rivet rod is arranged inside the sliding sleeve and inside the upper pull sleeve, and the upper end of the rivet rod is suitable for connection with a nut; the spring is arranged in the hollow structure of the lower pull sleeve and the hollow structure of the upper pull sleeve, one end of the spring is connected to the pull rod, and the other end of the spring is connected to the rivet rod, which can drive the rivet rod to move, thereby realizing torque transmission and pulling displacement.

[0006] In a possible implementation, a groove is provided at the top of the pull rod, and one end of the spring is disposed in the groove.

[0007] In one possible implementation, an annular support member extends from the connecting end of the lower pull sleeve toward the inner circumference, an annular groove is provided on the inner circumference of the connecting end of the lower pull sleeve, the upper pull sleeve arranged inside the lower pull sleeve is arranged in the annular groove, and the outer circumference of the upper pull sleeve arranged inside the lower pull sleeve is connected to the annular groove.

[0008] In a possible implementation, an annular structure is provided at the upper end connection position of the upper pull sleeve and the lower pull sleeve, and the bottom of the annular structure is connected to the top of the annular support member.

[0009] In a possible implementation, a rivet seat is further included, wherein a through hole is formed on the top of the rivet seat, and the position of the through hole corresponds to the position of the upper opening of the sliding sleeve. The rivet seat is arranged above the sliding sleeve, and the lower end of the rivet seat extends downward by a preset distance, and the extended portion is sleeved on the outer peripheral side of the sliding sleeve.

[0010] In a possible implementation, a fixed sleeve is further included. The fixed sleeve is a hollow structure, and the pull rod, the lower pull sleeve, the upper pull sleeve and the sliding sleeve are all arranged inside the fixed sleeve.

[0011] In a possible implementation, an annular groove is also provided on the fixing sleeve, and the connecting end of the rivet seat is provided in the fixing sleeve and in the annular groove of the fixing sleeve.

[0012] In a possible implementation, a limit block is further included, and the limit block is arranged on the rivet rod and inside the sliding sleeve.

[0013] In a possible implementation, the limiting block is an annular structure, and the diameter of the limiting block is larger than the diameter of the upper opening of the sliding sleeve.

[0014] In a possible implementation, the outer circumference of the pull-down sleeve is fixedly connected to the inner circumference of the fixing sleeve.

[0015] The beneficial effects of the present invention are as follows: by setting a pull rod, a lower pull sleeve, and an upper pull sleeve to form a sliding space, and installing a spring and a pull rod inside, torque transmission and pulling displacement can be achieved through such a setting. The bottom of the pull rod is connected to the rivet gun, and the rivet gun provides power to the pull rod. The rivet rod is connected to the upper pull sleeve, and the lower end of the rivet rod is connected to the sleeve, and the spring moves the rivet rod up and down. When riveting, the rivet nut pushes the rivet rod back, the spring is compressed, the rivet gun drives the pull rod to rotate forward, and the spring pushes the rivet rod to screw into the rivet nut; when riveting, the rivet gun drives the pull rod to move backward to complete the riveting action; after riveting is completed, the rivet gun drives the pull rod to rotate in the opposite direction, the spring is compressed, and the rivet rod is unscrewed from the rivet nut; when replacing the rivet rod, the sliding sleeve is manually retracted to unscrew the rivet rod, which is quick and convenient; through the above settings, the present application makes the overall structure compact and simple, and occupies little space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram showing the specific structure of the rivet nut expansion and contraction device according to an embodiment of the present application is shown;

[0017] Figure 2 An overall diagram of the rivet nut expansion and contraction device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below 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, rather than all the embodiments.

[0019] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or 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, and therefore should not be understood as a limitation to the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0022] In this utility model, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," "fixed," "joined," and "hinge" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, or integration; they may refer to mechanical or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0023] like Figures 1 to 2 As shown, the rivet nut telescopic device is used in conjunction with a rivet gun, including a pull rod 100, a lower pull sleeve 200, an upper pull sleeve 300, a sliding sleeve 400, a spring 500 and a rivet rod 600; the pull rod 100 is a "T"-shaped structure, and one end of the pull rod 100 is connected to the rivet gun; the lower pull sleeve 200 is a hollow structure with openings at both ends, and the shape of the hollow structure is an inverted "convex" shape, and the fixed end of the pull rod 100 is arranged inside the lower pull sleeve 200, and the lower pull sleeve 200 is clamped with the pull rod 100; the upper pull sleeve 300 is a hollow structure with openings at both ends, and the fixed end of the upper pull sleeve 300 is arranged inside the lower pull sleeve 200, and the interior of the upper pull sleeve 300 is connected to the interior of the lower pull sleeve 200, and there is a preset space between the upper pull sleeve 300 and the pull rod 100. distance, forming a sliding space; the sliding sleeve 400 is a hollow structure with openings at both ends, the sliding sleeve 400 is sleeved on the outer peripheral side of the connecting end of the upper pull sleeve 300, and there is a preset distance between the lower end of the sliding sleeve 400 and the upper end of the lower pull sleeve 200; the rivet rod 600 passes through the sliding sleeve 400, and the connecting end of the rivet rod 600 is arranged inside the sliding sleeve 400 and inside the upper pull sleeve 300, and the upper end of the rivet rod 600 is suitable for connection with the nut; the spring 500 is arranged in the hollow structure of the lower pull sleeve 200 and the hollow structure of the upper pull sleeve 300, one end of the spring 500 is connected to the top of the pull rod 100, and the other end of the spring 500 is connected to the lower end of the rivet rod 600, which can drive the rivet rod 600 to move, thereby realizing torque transmission and pulling displacement.

[0024] Specifically, the pull rod 100 is a "T"-shaped structure, and the lower pull sleeve 200 is set to an inverted "convex" shape. This setting is to enable the pull rod 100 to be directly clamped with the lower pull sleeve 200. Therefore, the fixed end of the pull rod 100 is set on the inner side of the lower pull sleeve 200 so that the two are clamped and the connection between the two is completed. The lower pull sleeve 200 is set to a hollow structure with two ends open. In order to enable the pull rod 100 to move inside the lower pull sleeve and to be able to connect to the upper pull sleeve 300, the fixed end of the upper pull sleeve 300 is set inside the lower pull sleeve 200 and has a certain preset distance from the pull rod 100. This setting is to enable the pull rod 100 to move inside the lower pull sleeve 200, and the upper pull sleeve 300 is set to a hollow structure so that the rivet rod 60 can be placed. 0, so the connecting end of the rivet rod 600 is arranged inside the upper pulling sleeve 300, and in order to ensure that the rivet rod 600 can move up and down, a spring 500 is arranged at the lower end of the rivet rod 600, the upper end of the spring 500 is connected to the lower end of the rivet rod 600, and the lower end of the spring 500 is connected to the upper end of the pull rod 100. Such an arrangement, after the connection between the rivet gun and the pull rod 100, drives the pull rod 100 to move up and down, and can also drive the rivet rod 600 to move up and down; in order to ensure that the rivet rod 600 does not slip out, a sliding sleeve 400 is provided on the upper pulling sleeve 300. The main purpose of providing the sliding sleeve 400 is to prevent the rivet rod 600 from slipping during work, and to more conveniently replace different types of rivet rods 600, just pull out the sliding sleeve 400 and directly replace the rivet rod 600.

[0025] In a possible implementation, a groove 110 is defined at the top of the pull rod 100 , and one end of the spring 500 is disposed in the groove 110 .

[0026] Specifically, such as Figure 1 As shown, in order to prevent the spring 500 from occupying the space of the lower pull sleeve 200 after compression, a groove 110 is opened on the top of the pull cylinder. The diameter of the groove 100 is larger than the diameter of the spring 500, and the depth of the groove 110 can accommodate the compressed spring 500.

[0027] In one possible implementation, an annular support member extends from the upper end of the lower pull sleeve 200 toward the inner circumference, and an annular groove 210 is provided on the inner circumference of the connecting end of the lower pull sleeve 200. The upper pull sleeve 300 arranged inside the lower pull sleeve 200 is arranged in the annular groove 210, and the outer circumference of the upper pull sleeve 300 arranged in the lower pull sleeve 200 is connected to the annular groove 210.

[0028] Specifically, such as Figure 1As shown, in order to enable the upper pull sleeve 300 to be fixed on the lower pull sleeve 200, an annular support member is extended from the upper end of the lower pull sleeve 200 toward the inner circumference, which plays a certain role in supporting the upper pull sleeve 300. An annular groove 210 is provided on the inner circumference of the connecting end of the lower pull sleeve 200, and the upper pull sleeve 300 arranged in the lower pull sleeve 200 is arranged on the annular groove 210, realizing double-layer fixation and ensuring that the two will not separate during use.

[0029] In a possible implementation, an annular structure 310 is provided at the upper end connecting the upper pull sleeve 300 and the lower pull sleeve 200 , and the bottom of the annular structure 310 is connected to the top of the annular support member.

[0030] Specifically, such as Figure 1 As shown, for better fixation, an annular structure 310 is provided. The annular structure 310 is provided at the upper connection position of the upper pull sleeve 300 and the lower pull sleeve 200 to play a certain supporting role.

[0031] In a possible implementation, it also includes a rivet seat 700, a through hole is opened on the top of the rivet seat 700, the position of the through hole corresponds to the position of the upper opening of the sliding sleeve 400, the rivet seat 700 is arranged above the sliding sleeve 400, and the lower end of the rivet seat 700 extends downward by a preset distance, and the extended part is sleeved on the outer peripheral side of the sliding sleeve 400; it also includes a fixed sleeve 800, the fixed sleeve 800 is a hollow structure, the pull rod 100, the lower pull sleeve 200, the upper pull sleeve 300 and the sliding sleeve 400 are all arranged inside the fixed sleeve 800; the outer peripheral side of the lower pull sleeve 200 is fixedly connected to the inner peripheral side of the fixed sleeve 800.

[0032] Specifically, such as Figure 1 As shown, the rivet seat 700 is mainly provided to prevent the sliding sleeve 400 from falling off, and the rivet seat 700 cooperates with the fixed sleeve 800 so that the pull rod 100, the lower pull sleeve 200, the upper pull sleeve 300 and the sliding sleeve 400 are all arranged inside the fixed sleeve 800, and the lower pull sleeve 200 is fixedly arranged on the inner circumference of the fixed sleeve 800, so that the pull rod 100, the lower pull sleeve 200, the upper pull sleeve 300 and the sliding sleeve 400 are all fixed in the fixed sleeve 800.

[0033] In a possible implementation, the annular groove is also provided on the fixing sleeve 800 , and the connecting end of the rivet seat 700 is provided in the fixing sleeve 800 and in the annular groove 210 of the fixing sleeve 800 .

[0034] Specifically, such as Figure 1 As shown, in order to fix the rivet seat 700 on the fixing sleeve 800, an annular groove 210 is provided on the inner circumference of the upper part of the fixing sleeve 800, so that the connecting end of the rivet seat 700 is provided in the annular groove 210 in the fixing sleeve 800, thereby achieving fixation between the two.

[0035] In a possible implementation, a limit block 610 is further included. The limit block 610 is arranged on the rivet rod 600 and inside the sliding sleeve 500. The limit block 610 is an annular structure, and the diameter of the limit block 610 is larger than the upper opening diameter of the sliding sleeve 500.

[0036] Specifically, such as Figure 1 As shown, in order to better prevent the rivet rod 600 from slipping during the working process, an annular limit block 610 is set on the rivet rod 600, so that the diameter of the limit block 610 is larger than the diameter of the upper opening of the sliding sleeve 400 to avoid falling off, but the diameter of the annular limit block 610 is smaller than the diameter of the upper opening of the upper pull sleeve 300, ensuring that the rivet rod 600 can move up and down in the upper pull sleeve 300 and the lower pull sleeve 200.

[0037] The fixing sleeve 800, the lower pull sleeve 200 and the upper pull sleeve 300 are all cylindrical structures, so as to facilitate use with a rivet gun.

[0038] When using the present application, first connect the rivet gun to the pull rod 100. When riveting, the rivet nut pushes the rivet rod 600 backward, the spring 500 is compressed, the rivet gun drives the pull rod 100 to rotate forward, and the spring 500 pushes the rivet rod 600 to screw into the rivet nut; when riveting, the rivet gun drives the pull rod 100 to move backward to complete the riveting action; after riveting is completed, the rivet gun drives the pull rod 100 to rotate in the opposite direction, the spring 500 is compressed, and the rivet rod 600 is screwed out of the rivet nut; when replacing the rivet rod 600, manually retract the sliding sleeve 400 and screw out the rivet rod 600.

[0039] Through the above settings, this application makes the overall structure compact and simple, occupies little space, is conducive to automated layout, and the rivet rod is easy to replace, effectively reducing maintenance time and improving production efficiency. It solves the technical problems of traditional automatic rivet nuts using cylinder telescopic method, large mechanism space occupation and many auxiliary parts.

[0040] The above description is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and concept of the present invention, should be covered by the protection scope of the present invention.

Claims

1. A rivet nut expansion device, used in conjunction with a rivet gun, characterized in that: It includes a pull rod, a lower pull sleeve, an upper pull sleeve, a sliding sleeve, a rivet rod and a spring; The pull rod is a "T"-shaped structure, and one end of the pull rod is connected to the rivet gun; The lower pull sleeve is a hollow structure with two ends open, and the interior is an inverted "convex" shape. The fixed end of the pull rod is arranged inside the lower pull sleeve, and the lower pull sleeve and the pull rod are clamped together; The upper pull sleeve is a hollow structure with two ends open. The fixed end of the upper pull sleeve is arranged inside the lower pull sleeve. The interior of the upper pull sleeve is connected to the interior of the lower pull sleeve. There is a preset distance between the upper pull sleeve and the pull rod to form a sliding space. The sliding sleeve is a hollow structure with two ends open. The sliding sleeve is arranged on the outer peripheral side of the connecting end of the upper pull sleeve, and a preset distance is set between the lower end of the sliding sleeve and the upper end of the lower pull sleeve. The rivet rod passes through the sliding sleeve, and the connecting end of the rivet rod is arranged inside the sliding sleeve and inside the upper pull sleeve, and the upper end of the rivet rod is suitable for connecting with the nut; The spring is arranged in the hollow structure of the lower pull sleeve and the hollow structure of the upper pull sleeve. One end of the spring is connected to the pull rod, and the other end of the spring is connected to the rivet rod, which can drive the rivet rod to move, thereby transmitting torque and pulling and shifting.

2. The rivet nut expansion device according to claim 1, characterized in that: A groove is provided on the top of the pull rod, and one end of the spring is arranged in the groove.

3. The rivet nut expansion device according to claim 2, characterized in that: An annular support member extends from the connecting end of the lower pull sleeve toward the inner circumference, and an annular groove is provided on the inner circumference of the connecting end of the lower pull sleeve. The upper pull sleeve arranged inside the lower pull sleeve is arranged in the annular groove, and the outer circumference of the upper pull sleeve arranged inside the lower pull sleeve is connected to the annular groove.

4. The rivet nut expansion device according to claim 3, characterized in that: An annular structure is provided at the upper end connection position of the upper pull sleeve and the lower pull sleeve, and the bottom of the annular structure is connected to the top of the annular support member.

5. The rivet nut expansion and contraction device according to any one of claims 1 to 4, characterized in that: It also includes a rivet seat, a top of which is provided with a through hole, the position of which corresponds to the position of the upper opening of the sliding sleeve, the rivet seat is arranged above the sliding sleeve, and the lower end of the rivet seat extends downward by a preset distance, and the extended portion is sleeved on the outer peripheral side of the sliding sleeve.

6. The rivet nut expansion device according to claim 5, characterized in that: It also includes a fixed sleeve, which is a hollow structure. The pull rod, the lower pull sleeve, the upper pull sleeve and the sliding sleeve are all arranged inside the fixed sleeve.

7. The rivet nut expansion device according to claim 6, characterized in that: An annular groove is also provided on the fixing sleeve, and the connecting end of the rivet seat is provided in the fixing sleeve and in the annular groove of the fixing sleeve.

8. The rivet nut expansion and contraction device according to claim 7, characterized in that: It also includes a limiting block, which is arranged on the rivet rod and inside the sliding sleeve.

9. The rivet nut expansion and contraction device according to claim 8, characterized in that: The limiting block is an annular structure, and the diameter of the limiting block is larger than the diameter of the upper opening of the sliding sleeve.

10. The rivet nut expansion and contraction device according to any one of claims 6 to 9, characterized in that: The outer circumference of the pull-down sleeve is fixedly connected to the inner circumference of the fixing sleeve.

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