Rivet nut assembling mechanism

Abstract

The utility model relates to the technical field of rivet nut assembling machinery, in particular to a rivet nut assembling mechanism which comprises a shell, a round connecting port is formed in the position, close to the lower end of the center, of the front face of the shell, and a connecting bearing is arranged on the inner side of the round connecting port. And the connecting bearing is located on the inner side of the cylindrical groove in the inner wall of the circular connecting opening, a driving piece is slidably connected to the inner side of the connecting bearing, one end of the driving piece is located on the inner side of the shell, and a gear ring is welded to the left side of the driving piece. The rivet nut is pushed into the horn driving groove by abutting the bolt against an internal thread of the rivet nut, then the servo motor drives the driving piece and the rubber pad to rotate, and the rivet nut is driven by the friction force between the rubber pad and the rivet nut to be rapidly and rotatably connected to the outer side of the bolt to complete connection. And the rivet nuts in the material guide rail fall into the inner side of the material outlet downwards again, so that the assembling efficiency can be improved by repeating the actions.

Description

Technical Field

[0001] The utility model relates to the technical field of rivet nut assembly machinery, in particular to a rivet nut assembly mechanism. Background Art

[0002] Pull rivet nuts, pull caps, instant pull caps, in the field of fastening, are widely used in the assembly of electromechanical and light industrial products such as automobiles, aviation, instruments, furniture, decoration, etc. It is developed to solve the shortcomings of easy melting of welding nuts on metal sheets and thin tubes, and easy slipping of tapping internal threads. It does not require tapping internal threads, does not require welding nuts, has strong riveting efficiency, and is easy to use. There are flat head, small head, hexagonal stainless steel rivet nuts with through holes, and flat head, small head, hexagonal stainless steel rivet nuts with blind holes.

[0003] Rivet Nuts If the nut of a product needs to be installed outside, and the space inside is too small to allow the pressure head of the riveting machine to enter for riveting, and the methods such as budding cannot meet the strength requirements, then both pressure riveting and expansion riveting are not feasible. Pull riveting must be used. It is suitable for the fastening of plates and pipes of various thicknesses (0.5MM-6MM). Using a pneumatic or manual pull riveting gun can rivet once, which is convenient and firm; it replaces the traditional welded nuts and makes up for the shortcomings of thin metal plates and thin pipes that are easy to melt and welded nuts that are not smooth.

[0004] Rivet nuts are used in conjunction with bolts. When leaving the factory, they need to be connected together with the bolts and then packaged for sale as a whole. When the bolts and rivet nuts are connected, they are generally connected by manual hand-tightening, which has poor work efficiency and affects productivity.

[0005] To this end, we propose a rivet nut assembly mechanism to solve the above-mentioned problems Utility Model Content

[0006] The utility model aims to solve the above-mentioned shortcomings in the prior art and proposes a rivet nut assembly mechanism.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A rivet nut assembly mechanism is designed, comprising a shell, a circular connecting port is arranged at a position near the central lower end of the front side of the shell, a connecting bearing is arranged on the inner side of the circular connecting port, the connecting bearing is located on the inner side of a cylindrical groove on the inner wall of the circular connecting port, a driving member is slidably connected to the inner side of the connecting bearing, one end of the driving member is located on the inner side of the shell, a gear ring is welded on the left side of the driving member, and a U-shaped mounting frame is fixed to the inner side of the shell by bolts.

[0009] Furthermore, a servo motor is installed at the upper end position on the right side of the U-shaped mounting frame, a gear is installed on the rotating shaft of the servo motor, and the gear is meshed and connected with the gear ring.

[0010] Furthermore, a locating bearing is installed on the left end face of the driving member, and the locating bearing is installed on the inner side of the central circular groove on the left side face of the driving member. A speaker driving groove is arranged inside the driving member, and a rubber pad is arranged on the inner wall of the speaker driving groove.

[0011] Furthermore, a pressure sensor mounting end is fixed to the center position of the U-shaped mounting frame by bolts, and the force-bearing end on which the pressure sensor is fixed is rotatably mounted on the inner side of the positioning bearing.

[0012] Furthermore, a spring is fixed on the U-shaped mounting frame, the spring is located outside the pressure sensor, and one end of the spring is in contact with the driving member.

[0013] Furthermore, a material guide track is fixed on the surface of the shell, a discharge port is arranged at the lower end of the material guide track, an inner wall of the discharge port is aligned with a side surface of the driving member, a hopper is connected to the upper end of the material guide track, a reserved opening is arranged on the material guide track, and the reserved opening is arranged parallel to the direction of the material guide track.

[0014] Furthermore, the housing is fixed with a control panel by bolts.

[0015] The utility model proposes a rivet nut assembly mechanism, which has the beneficial effects that: when the inner thread of the rivet nut is abutted by the bolt, the rivet nut is pushed into the inner side of the speaker driving groove, and the rivet nut abuts against the inner wall of the speaker driving groove after being inserted into the inner side of the speaker driving groove, so that the pressure sensor senses the pressure, and the servo motor is controlled by the control panel to drive the gear drive gear ring to drive the driving part to rotate, and when the driving part rotates, the friction between the rubber pad and the rivet nut can drive the rivet nut to rotate, and as the hand-pinched bolt is pushed inward, the rivet nut thread can be quickly connected to the outer side of the bolt, and then the bolt can be pulled out to bring out the rivet nut on its surface to complete the connection, and after the rivet nut is pulled out of the discharge port, the rivet nut in the guide track falls downward into the inner side of the discharge port again, and the above movement is repeated to quickly assemble the rivet nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a side cross-sectional view of the overall structure of the utility model;

[0018] Figure 3 It is a front view of the overall structure of the utility model;

[0019] Figure 4 This is a front view of the U-shaped mounting frame of the utility model;

[0020] Figure 5 It is a schematic diagram of the driving member of the utility model;

[0021] Figure 6 This is a schematic diagram of the material guide track of the utility model;

[0022] In the figure: 1. Shell; 11. Circular connecting port; 12. Connecting bearing; 13. U-shaped mounting bracket; 14. Servo motor; 15. Spring; 16. Pressure sensor; 17. Gear; 18. Control panel; 2. Driving part; 21. Speaker driving slot; 22. Rubber pad; 23. Gear ring; 24. Positioning bearing; 3. Material guide track; 31. Reserved port; 32. Discharge port; 4. Hopper. DETAILED DESCRIPTION

[0023] 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 of the embodiments.

[0024] Reference Figure 1-6 A rivet nut assembly mechanism includes a shell 1, a circular connecting port 11 is arranged at a position near the central lower end of the front side of the shell 1, a connecting bearing 12 is arranged on the inner side of the circular connecting port 11, and the connecting bearing 12 is located on the inner side of the cylindrical groove of the inner wall of the circular connecting port 11. A driving member 2 is slidably connected to the inner side of the connecting bearing 12. The driving member 2 is installed on the inner side of the connecting bearing 12 to reduce the friction between the driving member 2 and the circular connecting port 11, and can move slightly inward along the connecting bearing 12 when the driving member 2 is subjected to force. One end of the driving member 2 is located on the inner side of the shell 1, and a gear ring 23 is welded on the left side of the driving member 2. A U-shaped mounting frame 13 is fixed to the inner side of the shell 1 by bolts.

[0025] In detail, a servo motor 14 is installed at the upper end position on the right side of the U-shaped mounting frame 13, and a gear 17 is installed on the rotating shaft of the servo motor 14. When the rivet nut is inserted into the inner side of the speaker driving groove 21 and abuts against the driving member 2 to be forced inward, the gear ring 23 will move slightly along the gear 17. The gear 17 is meshed and connected with the gear ring 23. After the rivet nut is inserted into the inner side of the speaker driving groove 21, the servo motor 14 drives the gear 17 to rotate, and the gear 17 meshing with the gear ring 23 can drive the driving member 2 to rotate.

[0026] Furthermore, a locating bearing 24 is installed on the left end face of the driving member 2, and the locating bearing 24 is installed on the inner side of the central circular groove on the left side of the driving member 2. A speaker driving groove 21 is arranged inside the driving member 2. The arrangement of the speaker driving groove 21 can drive the rivet nut to rotate through the friction between the rubber pad 22 and the rivet nut after the rivet nut is inserted, so that the hand-pinched bolt can be quickly threadedly connected to the inner side of the rivet nut. The inner wall of the speaker driving groove 21 is provided with a rubber pad 22, and the rubber pad 22 can increase the friction between the speaker driving groove 21 and the rivet nut.

[0027] Furthermore, the center position of the U-shaped mounting frame 13 is fixed with a mounting end of the pressure sensor 16 by bolts, and the force-bearing end of the pressure sensor 16 is rotatably mounted on the inner side of the positioning bearing 24. The force-bearing end of the pressure sensor 16 is connected to the driving member 2 through the positioning bearing 24, and when the driving member 2 rotates, it will not drive the pressure sensor 16 to rotate.

[0028] In more detail, a spring 15 is fixed on the U-shaped mounting frame 13. The spring 15 is located on the outside of the pressure sensor 16. One end of the spring 15 abuts against the driving member 2. Because one end of the spring 15 abuts against the driving member 2, after the driving member 2 loses the abutment of the rivet nut, the outward elastic force of the spring 15 will push the driving member 2 to reset. After the driving member 2 is reset, the pressure sensor 16 is restored, and the control panel 18 loses the electrical signal to control the servo motor 14 to stop rotating.

[0029] In general, a material guide track 3 is fixed to the surface of the shell 1, and a discharge port 32 is arranged at the lower end of the material guide track 3. The inner wall of the discharge port 32 is aligned with the side surface of the driving member 2. The inner wall of the discharge port 32 is aligned with the side surface of the driving member 2, so that the rivet nut can be pushed into the inner side of the horn driving groove 21 when the inner thread of the rivet nut is abutted by the bolt. The upper end of the material guide track 3 is connected to a hopper 4, and the rivet nuts in the hopper 4 will be connected downward along the material guide track 3 in sequence. A reserved opening 31 is arranged on the material guide track 3, and the reserved opening 31 is arranged parallel to the direction of the material guide track 3. The number of rivet nuts in the material guide track 3 can be observed through the reserved opening 31, so that it is convenient to add rivet nuts to the hopper 4 in time.

[0030] Finally, the housing 1 is fixed with a control panel 18 by bolts. After the rivet nut is inserted into the inner side of the speaker driving groove 21, it abuts against the inner wall of the speaker driving groove 21, so that the driving member 2 moves slightly inward along the connecting bearing 12 to abut against the pressure sensor 16. When the pressure sensor 16 senses the pressure, it transmits a signal to the control panel 18. Through the control panel 18, the servo motor 14 is controlled to drive the gear 17 to rotate, which can drive the gear ring 23 to drive the driving member 2 to rotate.

[0031] Working method: When the rivet nut is connected with the bolt, the rivet nut is first placed in the hopper 4, and the rivet nut will move downward along the guide track 3 to the inside of the discharge port 32, and then the rivet nut will be pushed inward along the discharge port 32 into the inside of the speaker drive groove 21 when the bolt abuts against the inner thread of the rivet nut. After the rivet nut is inserted into the inside of the speaker drive groove 21, it abuts against the inner wall of the speaker drive groove 21, so that the driving member 2 moves slightly inward along the connecting bearing 12 to abut against the pressure sensor 16. When the pressure sensor 16 senses the pressure, it will transmit a signal to the control panel 18. The control panel 18 controls the servo motor 14 to drive the gear 17 to rotate, which can drive the gear ring 23 to drive the driving member 2 to rotate. When the driving member 2 rotates, it will contact with the rubber pad 22. The friction between the rivet nuts can drive the rivet nuts to rotate. As the hand-pinched bolt is pushed inward, the rivet nut thread can be quickly connected to the outside of the bolt. Then the bolt can be pulled out to bring out the rivet nut on its surface to complete the connection. After the rivet nut is pulled out of the speaker drive groove 21, the driving member 2 loses the abutment of the rivet nut and the outward elastic force of the spring 15 will push the driving member 2 to reset. After the driving member 2 is reset, the pressure sensor 16 is restored, and the control panel 18 loses the electrical signal to control the servo motor 14 to stop rotating. At the same time, after the rivet nut is pulled out of the discharge port 32, the rivet nut in the guide track 3 falls down into the inside of the discharge port 32 again. Repeating the above actions can quickly assemble the rivet nut.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rivet nut assembly mechanism, comprising a housing (1), characterized in that: A circular connection opening (11) is provided at a position near the central lower end of the front side of the shell (1), a connecting bearing (12) is provided on the inner side of the circular connection opening (11), the connecting bearing (12) is located on the inner side of a cylindrical groove on the inner wall of the circular connection opening (11), a driving member (2) is slidably connected to the inner side of the connecting bearing (12), one end of the driving member (2) is located on the inner side of the shell (1), a gear ring (23) is welded on the left side of the driving member (2), and a U-shaped mounting frame (13) is fixed to the inner side of the shell (1) by bolts.

2. A rivet nut assembly mechanism according to claim 1, characterized in that: A servo motor (14) is installed at the upper right end of the U-shaped mounting frame (13), a gear (17) is installed on the rotating shaft of the servo motor (14), and the gear (17) is meshedly connected with a gear ring (23).

3. The rivet nut assembly mechanism according to claim 1, characterized in that: A positioning bearing (24) is installed on the left end surface of the driving member (2), and the positioning bearing (24) is installed on the inner side of the central circular groove on the left side surface of the driving member (2). A speaker driving groove (21) is arranged inside the driving member (2), and a rubber pad (22) is arranged on the inner wall of the speaker driving groove (21).

4. The rivet nut assembly mechanism according to claim 1, characterized in that: The center position of the U-shaped mounting frame (13) is fixed with a mounting end of a pressure sensor (16) by means of bolts, and the force-bearing end on which the pressure sensor (16) is fixed is rotatably mounted on the inner side of a positioning bearing (24).

5. The rivet nut assembly mechanism according to claim 1, characterized in that: A spring (15) is fixed on the U-shaped mounting frame (13), the spring (15) is located outside the pressure sensor (16), and one end of the spring (15) is in contact with the driving member (2).

6. The rivet nut assembly mechanism according to claim 1, characterized in that: A material guide track (3) is fixed on the surface of the shell (1); a discharge port (32) is arranged at the lower end of the material guide track (3); an inner wall of the discharge port (32) is aligned with a side surface of the driving member (2); a hopper (4) is connected to the upper end of the material guide track (3); a reserved opening (31) is arranged on the material guide track (3); and the reserved opening (31) is arranged parallel to the direction of the material guide track (3).

7. The rivet nut assembly mechanism according to claim 1, characterized in that: The housing (1) is fixed with a control panel (18) by means of bolts.

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