Riveting transmission mechanism and electric rivet nut gun

Abstract

The present invention relates to the technical field of riveting devices, and provides a riveting transmission mechanism and an electric rivet nut gun, wherein the riveting transmission mechanism includes a rear bearing seat, a front bearing seat, a screw assembly, a spiral transmission connecting sleeve, a riveting assembly, a driving motor and a transmission mechanism, and the screw assembly includes a transmission nut and a screw. The driving motor is started, and the spiral transmission connecting sleeve is driven to rotate around the axis through the transmission mechanism, and at the same time, the riveting assembly is driven to rotate around the axis. At this time, the riveting assembly drives the rivet nut to rotate and screws it into the threaded hole of the object to be riveted; at the same time, the driving motor drives the transmission nut of the screw assembly to rotate around the axis, and the screw performs linear motion in the axial direction, thereby pulling the riveting assembly to realize the riveting action of the riveted nut. The riveting transmission mechanism of the present application has a small number of parts, a compact overall structure and a smaller volume, and at the same time, a simple transmission process.

Description

Technical Field

[0001] The present invention relates to the technical field of riveting devices, and in particular provides a riveting transmission mechanism and an electric rivet nut gun having the riveting transmission mechanism. Background Art

[0002] Rivet nut guns are common riveting tools that are widely used in production fields such as construction, automobiles, ships, and electrical appliances.

[0003] The core mechanism of a rivet nut gun is the riveting drive mechanism. This mechanism performs two actions during operation: first, it drives the rivet nut into the object to be riveted; second, it pulls the rivet nut into place, securing it to the object. The need to perform these two installation actions results in the bulk and complexity of existing riveting drive mechanisms. Summary of the Invention

[0004] The object of the present invention is to provide a riveting transmission mechanism, aiming to solve the problem that the existing riveting transmission mechanism is bulky and has a complex structure.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a riveting transmission mechanism, including a rear bearing seat, a front bearing seat sleeved on the outside of the rear bearing seat, a screw assembly arranged in the rear bearing seat and rotating around the central axis of the rear bearing seat, a spiral transmission connecting sleeve placed in the rear bearing seat and extending to the front bearing seat, a riveting assembly sleeved in the spiral transmission connecting sleeve and used for a rivet nut, a driving motor for driving the screw assembly and the spiral connecting sleeve to rotate around the axis, and a transmission mechanism for connecting the driving motor and the spiral transmission connecting sleeve, the screw assembly including a transmission nut connected to the output end of the driving motor and a screw passing through the transmission nut and adapted to the transmission nut, one end of the screw being connected to the riveting assembly.

[0006] Specifically, the transmission mechanism is the transmission nut, which has a bearing portion placed in the rear bearing seat and a transmission portion formed by the bearing portion protruding radially outward and used to connect to the output end of the drive motor. The spiral transmission connecting sleeve is arranged in the bearing portion and rotates around the axis with the bearing portion.

[0007] Specifically, the riveting transmission mechanism further includes a first bearing and a second bearing, the first bearing being arranged between the rear bearing seat and the bearing portion, and the second bearing being arranged between an end portion of the front bearing seat and an end portion of the bearing portion.

[0008] Alternatively, the transmission mechanism is a gear sleeved on the output end of the drive motor, and the spiral transmission connecting sleeve includes a main body with a hollow structure and a toothed portion formed by the main body protruding radially outward, and the toothed portion is meshedly connected to the gear.

[0009] Furthermore, an intermediate transmission mechanism for adjusting the rotational speed is provided between the gear and the tooth connection portion.

[0010] Specifically, the riveting transmission mechanism further includes a third bearing provided between the front bearing seat and the toothed portion, and a fourth bearing provided between the toothed portion and the end side of the transmission nut.

[0011] Specifically, the riveting assembly includes a sleeve sleeved in the spiral transmission connecting sleeve, a connecting rotating shaft installed at the end of the sleeve, and a drawing screw fixed to an end of the connecting rotating shaft away from the sleeve.

[0012] Specifically, a guide groove is provided on the side wall of the spiral transmission connecting sleeve along the axial direction, and a connecting pin passing through the guide groove is provided on the connecting rotating shaft.

[0013] Beneficial effects of the present invention: The riveting transmission mechanism of the present application has a small number of parts, a compact overall structure and a smaller volume, and at the same time, the transmission process is simple.

[0014] The present invention also provides an electric rivet nut gun, comprising an induction switch assembly and the above-mentioned riveting transmission mechanism, wherein the induction switch assembly comprises a first switch induction member and a second switch induction member arranged at intervals along the axial direction of the screw rod of the riveting transmission mechanism, and a first induction switch and a second induction switch respectively arranged directly above the first switch induction member and directly above the second switch induction member.

[0015] Beneficial effects of the present invention: The electric rivet nut gun provided by the present invention, based on the above-mentioned riveting transmission mechanism, has a small overall volume, a compact structure, and is more convenient to assemble.

[0016] Specifically, the electric rivet nut gun also includes a pulling adjustment mechanism arranged along the axial direction of the screw rod of the riveting transmission mechanism, the pulling adjustment mechanism includes an adjusting nut, a rod body inserted into the adjusting nut and movable relative to the adjusting nut along the axial direction of the screw rod of the riveting transmission mechanism, and a third induction switch provided on the rod body, the induction switch assembly includes a third switch induction component arranged side by side with the second switch induction component and used for mutual induction with the third induction switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A cross-sectional view of the riveting transmission mechanism provided in the first embodiment of the present invention;

[0019] Figure 2 A cross-sectional view of the spiral transmission connecting sleeve and the transmission mechanism of the riveting transmission mechanism provided in the first embodiment of the present invention;

[0020] Figure 3 A schematic structural diagram of a riveting assembly of a riveting transmission mechanism provided in the first embodiment of the present invention;

[0021] Figure 4 A cross-sectional view of a riveting transmission mechanism provided in a second embodiment of the present invention;

[0022] Figure 5 A schematic structural diagram of a spiral transmission connecting sleeve of a riveting transmission mechanism provided in a second embodiment of the present invention;

[0023] Figure 6 A cross-sectional view of an electric nut gun provided in an embodiment of the present invention.

[0024] Among them, the reference numerals in the figures are:

[0025] Riveting transmission mechanism 100, rear bearing seat 10, front bearing seat 20, screw assembly 30, spiral transmission connecting sleeve 40, riveting assembly 50, drive motor 60, transmission mechanism 70, transmission nut 31, screw 32, bearing part 311, transmission part 312, mounting step 313, first bearing 81, second bearing 82, sleeve 51, connecting rotating shaft 52, drawing screw 53, guide groove 40a, connecting pin 521, main body 41, toothed part 42, mounting hole 10a, third bearing 83, fourth bearing 84, induction switch assembly 200, first switch induction member 201, second switch induction member 202, first induction switch 203, second induction switch 204, drawing adjustment mechanism 300, adjusting nut 301, rod body 302, third induction switch 303, third switch induction member 205. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals 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 are not to be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying 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.

[0028] 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 identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0029] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] Please refer to Figure 1 and Figure 2The riveting transmission mechanism 100 provided by an embodiment of the present invention includes a rear bearing seat 10, a front bearing seat 20 sleeved on the outside of the rear bearing seat 10, a screw assembly 30 provided in the rear bearing seat 10 and rotating around the central axis of the rear bearing seat 10, a spiral transmission connecting sleeve 40 placed in the rear bearing seat 10 and extending to the front bearing seat 20, a riveting assembly 50 sleeved in the spiral transmission connecting sleeve 40 and used for riveting nuts, a drive motor 60 for driving the screw assembly 30 and the spiral transmission connecting sleeve 40 to rotate around the axis, and a transmission mechanism 70 for connecting the drive motor 60 and the spiral transmission connecting sleeve 40, the screw assembly 30 includes a transmission nut 31 connected to the output end of the drive motor 60 and a screw 32 penetrated through the transmission nut 31 and adapted to the transmission nut 31, one end of the screw 32 is connected to the riveting assembly 50.

[0031] The riveting transmission mechanism 100 of the present application has a small number of parts, a compact overall structure and a smaller volume, and a simple transmission process.

[0032] Example 1

[0033] Specifically, please refer to Figure 1 and Figure 2 In this embodiment, the transmission mechanism 70 is a transmission nut 31. The transmission nut 31 has a bearing portion 311 positioned within the rear bearing seat 10 and a transmission portion 312 formed by radially outwardly extending from the bearing portion 311 and configured to connect to the output end of the drive motor 60. The spiral transmission connecting sleeve 40 is disposed within the bearing portion 311 and rotates along with the bearing portion 311 about the axis. The bearing portion 311 is a tubular structure, its inner wall being provided with a mounting step 313. The spiral transmission connecting sleeve 40 is directly secured to the mounting step 313 of the bearing portion 311, and the two are interference-fitted to prevent relative rotation. Thus, the output end of the drive motor 60 merely engages and connects with the transmission portion 312 of the transmission nut 31 to drive the spiral transmission connecting sleeve 40 to rotate about the axis. This results in a compact overall structure and a simple transmission relationship.

[0034] Specifically, please refer to Figure 1 The riveting transmission mechanism 100 further includes a first bearing 81 and a second bearing 82. The first bearing 81 is disposed between the rear bearing seat 10 and the bearing portion 311, and the second bearing 82 is disposed between the end of the front bearing seat 10 and the end of the bearing portion 311. It can be understood that the first bearing 81 and the second bearing 82 enable relative rotation between the bearing portion 311 of the transmission nut 31 and the rear bearing seat 10.

[0035] Specifically, please refer to Figure 1 and Figure 3The riveting assembly 50 includes a sleeve 51 sleeved within the helical drive coupling sleeve 40, a connecting shaft 52 mounted at the end of the sleeve 51, and a drawing screw 53 fixed to the end of the connecting shaft 52 away from the sleeve. It can be understood that the transmission sequence is as follows: the helical drive coupling sleeve 40 drives the sleeve 51, the sleeve 51 drives the connecting shaft 52, and the connecting shaft 52 drives the drawing screw 53, ultimately achieving rotation of the drawing screw 53 around its axis.

[0036] Specifically, please refer to Figure 1 and Figure 3 The sidewall of the helical drive coupling sleeve 40 defines a guide groove 40a in the axial direction, and a connecting pin 521 is provided on the connecting rotating shaft 52, which passes through the guide groove. It can be understood that when the connecting pin 521 is inserted into the corresponding guide groove 40a, the rotational force of the helical drive coupling sleeve 40 driving the connecting rotating shaft 52 to rotate about the axis is further increased.

[0037] Example 2

[0038] Please refer to Figure 4 and Figure 5 , which is different from the above-mentioned embodiment, is that the transmission mechanism 70 is a gear mounted on the output end of the drive motor 60, and the helical transmission connecting sleeve 40 includes a main body 41 with a hollow structure and a toothed portion 42 formed by the main body 41 protruding radially outward, and the toothed portion 42 is meshedly connected to the gear. It can be understood that there is no connection between the transmission nut 31 and the helical transmission connecting sleeve 40, but rather the transmission nut 31 is driven to rotate by the gear located at the output end of the drive motor 60. Specifically, a mounting hole 10a is provided on the rear bearing seat 10, and the gear extends into the rear bearing seat 10 through the mounting hole 10a and meshes with the toothed portion 42 of the helical transmission connecting sleeve 40 to drive the main body 41 to rotate about the axis. Similarly, this transmission method does not change the installation position of the helical transmission connecting sleeve 40 in the rear bearing seat 10, but only provides a gear on the outside of the rear bearing seat 10, making the overall structure of the riveted transmission mechanism 100 of the present application equally compact and smaller in size. Furthermore, in terms of transmission mode, the drive nut 31 is separated from the screw assembly 30 and is not affected by it, but is directly driven by the drive motor 60, so that a more suitable speed can be obtained when riveting the nut. For example, the transmission ratio between the gear and the toothed portion 42 can be changed according to actual use requirements.

[0039] Furthermore, although not shown, an intermediate transmission mechanism (not shown) is provided between the gear and the toothed portion 42 for adjusting the rotational speed. It is understood that by adding an intermediate mechanism between the gear and the toothed portion 42, the transmission ratio between the two can also be varied. For example, the intermediate transmission mechanism can be a toothed column pivotally connected to the rear bearing seat 10, whereby the gear meshes with the toothed portion 42 via the toothed column. Of course, the intermediate transmission mechanism can also be other types of transmission mechanisms, which will not be discussed here.

[0040] Specifically, please refer to Figure 4 To ensure that the spiral transmission sleeve 40 rotates around the axis in the rear bearing seat 10, the riveting transmission mechanism 100 further includes a third bearing 83 provided between the front bearing seat 20 and the toothed portion 42, and a fourth bearing 84 provided between the toothed portion 42 and the end side of the transmission nut 31.

[0041] Please refer to Figure 6 The present invention also provides an electric rivet nut gun, including a sensing switch assembly 200 and the above-mentioned riveting transmission mechanism 100, the sensing switch assembly 200 including a first switch sensing member 201 and a second switch sensing member 202 spaced apart along the axial direction of the screw rod 32 of the riveting transmission mechanism 100, and a first sensing switch 203 and a second sensing switch 204 respectively provided directly above the first switch sensing member 201 and directly above the second switch sensing member 202.

[0042] The electric rivet nut gun provided by an embodiment of the present invention has the following process: when the second induction switch 204 and the second switch induction member 202 sense each other, the drive motor 60 of the riveting transmission mechanism 100 is powered on and started, wherein the spiral transmission connecting sleeve 40 drives the riveting assembly 50 to rotate around the axis, and the screw assembly 30 realizes the pulling action of the riveting assembly 50; as the screw 32 of the screw assembly 30 moves backward in the pulling direction, when the first switch induction member 201 and the second induction switch 204 sense each other, the drive motor 60 is powered off and stopped, that is, the riveting action of the screw assembly 30 is completed, that is, the rivet nut installation is completed.

[0043] Specifically, please refer to Figure 6 In this embodiment, in order to meet the requirements of pulling rivet nuts of different specifications, the electric rivet nut gun also includes a pulling adjustment mechanism 300 arranged along the axial direction of the screw 32 of the riveting transmission mechanism 100. The pulling adjustment mechanism 300 includes an adjusting nut 301, a rod 302 that passes through the adjusting nut 301 and can move relative to the adjusting nut 301 along the axial direction of the screw 32 of the riveting transmission mechanism 100, and a third sensor switch 303 provided on the rod 302. The sensor switch assembly 200 includes a third switch sensor 205 that is arranged side by side with the second switch sensor 202 and is used for mutual induction with the third sensor switch 303. It can be understood that a scale is provided on the rod 302, and the relative position of the rod 302 and the adjusting nut 301 in the pulling direction is selected according to the scale, that is, the distance between the third sensor switch 303 and the third switch sensor 205 is adjusted. When the drive motor 60 is started, the axial movement distance of the screw rod 32 of the screw rod assembly 30 is the pulling depth of the rivet nut by the rivet assembly 50. When the third switch sensing component 205 moves with the screw rod 32 and senses the third sensing switch 303, the drive motor 60 stops and the screw rod 32 suspends the pulling action.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A riveting transmission mechanism, characterized in that: The invention comprises a rear bearing seat, a front bearing seat sleeved on the outside of the rear bearing seat, a screw assembly arranged in the rear bearing seat and rotating around the central axis of the rear bearing seat, a spiral transmission connecting sleeve placed in the rear bearing seat and extending to the front bearing seat, a riveting assembly sleeved in the spiral transmission connecting sleeve and used for a rivet nut, a driving motor for driving the screw assembly and the spiral transmission connecting sleeve to rotate around the axis, and a transmission mechanism for connecting the driving motor and the spiral transmission connecting sleeve, the screw assembly comprising a transmission nut connected to the output end of the driving motor and a screw rod passing through the transmission nut and adapted to the transmission nut, one end of the screw rod being connected to the riveting assembly; The transmission mechanism is the transmission nut, which has a bearing portion placed in the rear bearing seat and a transmission portion formed by the bearing portion protruding radially outward and used to connect to the output end of the drive motor. The spiral transmission connecting sleeve is arranged in the bearing portion and rotates around the axis with the bearing portion.

2. The riveting transmission mechanism according to claim 1, characterized in that: The riveting transmission mechanism further includes a first bearing and a second bearing, wherein the first bearing is arranged between the rear bearing seat and the bearing portion, and the second bearing is arranged between an end portion of the front bearing seat and an end portion of the bearing portion.

3. A riveting transmission mechanism, characterized in that: The invention comprises a rear bearing seat, a front bearing seat sleeved on the outside of the rear bearing seat, a screw assembly arranged in the rear bearing seat and rotating around the central axis of the rear bearing seat, a spiral transmission connecting sleeve placed in the rear bearing seat and extending to the front bearing seat, a riveting assembly sleeved in the spiral transmission connecting sleeve and used for a rivet nut, a driving motor for driving the screw assembly and the spiral transmission connecting sleeve to rotate around the axis, and a transmission mechanism for connecting the driving motor and the spiral transmission connecting sleeve, the screw assembly comprising a transmission nut connected to the output end of the driving motor and a screw rod passing through the transmission nut and adapted to the transmission nut, one end of the screw rod being connected to the riveting assembly; The transmission mechanism is a gear sleeved on the output end of the drive motor. The spiral transmission connecting sleeve includes a main body with a hollow structure and a toothed portion formed by the main body protruding radially outward. The toothed portion is meshed and connected to the gear.

4. The riveting transmission mechanism according to claim 3, characterized in that: An intermediate transmission mechanism for adjusting the rotational speed is also provided between the gear and the tooth connection portion.

5. The riveting transmission mechanism according to claim 3, characterized in that: The riveting transmission mechanism further includes a third bearing provided between the front bearing seat and the toothed portion, and a fourth bearing provided between the toothed portion and the end side of the transmission nut.

6. The riveting transmission mechanism according to claim 1 or 3, characterized in that: The riveting assembly includes a sleeve sleeved in the spiral transmission connecting sleeve, a connecting rotating shaft installed at the end of the sleeve, and a drawing screw fixed to an end of the connecting rotating shaft away from the sleeve.

7. The riveting transmission mechanism according to claim 6, characterized in that: A guide groove is provided on the side wall of the spiral transmission connecting sleeve along the axial direction, and a connecting pin which passes through the guide groove is provided on the connecting rotating shaft.

8. An electric rivet nut gun, characterized by: The invention comprises an inductive switch assembly and a riveting transmission mechanism according to any one of claims 1 to 7, wherein the inductive switch assembly comprises a first switch inductive member and a second switch inductive member spaced apart in the axial direction of a screw rod of the riveting transmission mechanism, and a first inductive switch and a second inductive switch respectively arranged directly above the first switch inductive member and directly above the second switch inductive member.

9. The electric rivet nut gun according to claim 8, characterized in that: The electric rivet nut gun also includes a pulling adjustment mechanism arranged along the axial direction of the screw rod of the riveting transmission mechanism, the pulling adjustment mechanism includes an adjusting nut, a rod body inserted into the adjusting nut and movable relative to the adjusting nut along the axial direction of the screw rod of the riveting transmission mechanism, and a third induction switch provided on the rod body, the induction switch assembly includes a third switch induction member arranged side by side with the second switch induction member and used for mutual induction with the third induction switch.

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