A rotary riveting mechanism

Abstract

The utility model discloses a rotary riveting mechanism, comprising a machine base, and a lifting module and a rotating module arranged on the machine base, the lifting module comprising a nut, a first gear, a second gear, a first motor and a screw rod, the nut is rotatably connected to the machine base, the first gear is installed on the nut, the screw rod is threadedly connected to the nut, the screw rod is movably connected to the machine base up and down, the second gear is transmission-connected to the first gear, the first motor can drive the nut to rotate, so that the nut drives the screw rod to move up and down, the rotating module is arranged on the screw rod, the screw rod can drive the rotating module to move up and down, the rotating module comprises a rotary riveting head, a rotating shaft and a second motor, an axial hole extending up and down is provided in the screw rod, the rotating shaft can be rotatably penetrated in the axial hole, the lower end of the rotating shaft is connected to the rotary riveting head, and the upper end of the rotating shaft is connected to the main shaft of the second motor, the utility model adopts a lifting module of a screw rod + a motor, the screw rod can drive the rotating module to move downward steadily and at a uniform speed, so that the rivet is deformed evenly and the rotary riveting effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of riveting equipment, in particular to a rotary riveting mechanism. Background Art

[0002] Riveting is a process of connecting and fixing two workpieces by squeezing rivets to deform them. Rotary riveting is one of the riveting processes and is usually implemented using a rotary riveting mechanism. The traditional rotary riveting mechanism mainly includes a machine base and a lifting module and a rotating module arranged on the machine base. The lifting module mainly uses an air cylinder or an oil cylinder. The rotating module mainly includes a rotary rivet head, a pressure rod and a motor. The pressure rod is installed on the rotary rivet head, and the rotary rivet head is driven by the motor to rotate. The rotary rivet head drives the pressure rod to rotate, and under the drive of the air cylinder / oil cylinder, the pressure rod makes a conical movement around the rivet and presses down the rivet, thereby flattening the rivet to complete the rotary riveting operation.

[0003] However, since the air cylinder / oil cylinder drives the rotating module to move downward at a too fast speed, the impact force of the riveting head on the rivet is too large in a short period of time, resulting in uneven deformation of the rivet and poor riveting effect. Utility Model Content

[0004] The utility model aims at the deficiencies in the prior art and provides a rotary riveting mechanism, which adopts a lifting module of a screw rod + a motor. The screw rod can drive the rotating module to move downward steadily and at a uniform speed, thereby avoiding excessive impact force of the rotary riveting head on the rivet in a short period of time, making the rivet deform evenly and achieving better rotary riveting effect.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A riveting mechanism comprises a machine base, and a lifting module and a rotating module arranged on the machine base, the lifting module comprising a nut, a first gear, a second gear, a first motor and a screw rod, the nut is rotatably connected to the machine base, the first gear is installed on the nut, the second gear is installed on the main shaft of the first motor, the screw rod is threadedly connected to the nut, the screw rod can be movably connected to the machine base up and down along its own axial direction, the second gear is transmission connected to the first gear, so that the first motor can drive the nut to rotate, and the nut drives the screw rod to move up and down, the rotating module is arranged on the screw rod, the screw rod can drive the rotating module to move up and down, the rotating module comprises a riveting head, a rotating shaft and a second motor, the screw rod is provided with an axial hole extending up and down, the rotating shaft can be rotatably penetrated in the axial hole, the lower end of the rotating shaft is connected to the riveting head, and the upper end of the rotating shaft is connected to the main shaft of the second motor.

[0007] By setting a lifting module composed of a nut, a first gear, a second gear, a first motor and a screw rod, the nut is rotatably connected to the machine base, the first gear is installed on the nut, the second gear is installed on the main shaft of the first motor, the screw rod is threadedly connected to the nut, the screw rod can be movably connected to the machine base up and down along its own axial direction, the rotating module is arranged on the screw rod and can be driven by the screw rod to move up and down, the rotating shaft on the rotating module rotates and penetrates the shaft hole on the screw rod, when working, the second motor can drive the rotating shaft to rotate in the shaft hole, and the rotating shaft drives the rivet head to rotate; the first motor is connected to the first motor through the second gear. The cooperation of gears drives the nut to rotate, and the nut drives the screw rod to move downward, so that the screw rod drives the rotating module to move downward to realize the rotary riveting work. The lifting module of screw rod + motor is adopted. The screw rod can drive the rotating module to move downward smoothly and at a uniform speed, so as to avoid excessive impact force of the rotary riveting head on the rivet in a short time, so that the rivet is deformed evenly and the rotary riveting effect is better. In addition, a rotating shaft is arranged to rotate and pass through the axial hole of the screw rod, so that the screw rod and the rotating shaft are arranged coaxially, and the downward pressure output by the screw rod is concentrated on the axis of the rotating shaft, so that the pressure rod on the rotary riveting head is more even when pressing the rivet, further improving the rotary riveting effect.

[0008] As a preferred solution, a guide assembly is also provided on the machine base, and the guide assembly includes a guide seat and a plurality of guide rods, the guide rods are connected to the machine base, the guide seat is slid up and down on the guide rods, the upper end of the screw rod is connected to the guide seat, and the second motor is arranged on the guide seat.

[0009] As a preferred solution, the guide seat is provided with a connecting arm corresponding to the guide rod one by one, the connecting arm is provided with a guide sleeve, and the guide sleeve is connected to the guide rod in an up-and-down sliding manner.

[0010] As a preferred solution, a long hole is provided on the connecting arm, the length direction of the long hole is the same as the radial direction of the guide rod, and a connecting hole is provided on the guide seat. The bolt passes through the long hole and the connecting hole in sequence to install the connecting arm on the guide seat.

[0011] As a preferred solution, an outer sleeve is provided on the machine base, and an inner sleeve is provided at the lower end of the screw rod. The inner sleeve can be slid up and down in the outer sleeve, and the inner sleeve can move up and down with the screw rod, and the rotating shaft can be rotatably passed through the inner sleeve.

[0012] As a preferred solution, a connecting protrusion is provided at the lower end of the screw rod, and a first connecting groove is provided at the upper end of the inner sleeve, and the connecting protrusion is embedded in the first connecting groove to connect the screw rod to the inner sleeve.

[0013] As a preferred solution, a first bearing is provided in the first connecting groove, a second connecting groove is provided at the lower end of the inner sleeve, a second bearing is provided in the second connecting groove, and the rotating shaft is rotatably connected to the first bearing and the second bearing.

[0014] As a preferred solution, a second gear is connected to the main shaft of the first motor, and the second gear is transmission-connected to the first gear via a transmission member.

[0015] As a preferred solution, the first gear and the second gear are both synchronous pulleys, and the transmission member is a synchronous belt.

[0016] As a preferred solution, a connecting ring is provided between the nut and the first gear, the first gear is mounted on the upper end of the connecting ring, the first gear has an avoidance hole for the screw rod to pass through, and the nut is mounted on the lower end of the connecting ring.

[0017] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, by providing a lifting module composed of a nut, a first gear, a second gear, a first motor and a screw rod, the nut is rotatably connected to the machine base, the first gear is installed on the nut, the second gear is installed on the main shaft of the first motor, the screw rod is threadedly connected to the nut, the screw rod can be movably connected to the machine base up and down along its own axial direction, the rotating module is arranged on the screw rod and can be driven by the screw rod to move up and down, the rotating shaft on the rotating module rotates and penetrates into the shaft hole on the screw rod, and when working, the second motor can drive the rotating shaft to rotate in the shaft hole, and the rotating shaft drives the rivet head to rotate The first motor drives the nut to rotate through the cooperation of the second gear and the first gear, and the nut drives the screw rod to move downward, so that the screw rod drives the rotating module to move downward to realize the riveting work. The lifting module of the screw rod + motor is adopted. The screw rod can drive the rotating module to move downward steadily and at a uniform speed, so as to avoid excessive impact force of the riveting head on the rivet in a short time, so that the rivet is deformed evenly and the riveting effect is better. In addition, a rotating shaft is arranged to rotate and pass through the shaft hole of the screw rod, so that the screw rod and the rotating shaft are coaxially arranged, and the downward pressure output by the screw rod is concentrated on the axis of the rotating shaft, so that the pressure rod on the riveting head is more even when pressing the rivet, and the riveting effect is further improved.

[0018] In order to more clearly illustrate the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the assembly structure of an embodiment of the utility model;

[0020] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the utility model;

[0021] Figure 3 It is an exploded schematic diagram of an embodiment of the utility model without the first motor and the transmission member;

[0022] Figure 4It is a schematic diagram of the assembly of the base and guide components of an embodiment of the utility model.

[0023] Description of the accompanying drawings:

[0024] 10-base; 11-accommodating groove; 12-third bearing; 13-outer sleeve; 20-lifting module; 21-nut; 22-first gear; 221-avoidance hole; 23-first motor; 24-screw; 241-shaft hole; 242-connecting protrusion; 25-second gear; 26-transmission member; 27-connecting ring; 28-inner sleeve; 281-first connecting groove; 282-first bearing; 283-second connecting groove; 284-second bearing; 30-rotating module; 31-spindle head; 311-pressure rod; 32-rotating shaft; 33-second motor; 40-guide assembly; 41-guide seat; 411-connecting hole; 42-guide rod; 43-connecting arm; 44-guide sleeve. DETAILED DESCRIPTION

[0025] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0027] like Figure 1-4As shown, the utility model discloses a rotary riveting mechanism, including a machine base 10, and a lifting module 20 and a rotating module 30 arranged on the machine base 10, the lifting module 20 includes a nut 21, a first gear 22, a second gear 25, a first motor 23 and a screw rod 24, the first motor 23 can be a servo motor, the nut 21 is rotatably connected to the machine base 10, specifically, the machine base 10 is provided with a receiving groove 11, the nut 21 is rotatably arranged in the receiving groove 11 through a third bearing 12, the first gear 22 is installed on the nut 21, the second gear 25 is installed on the main shaft of the first motor 23, the screw rod 24 is threadedly connected to the nut 21, the screw rod 24 can be movably connected to the machine base 10 up and down along its own axial direction, the first motor 23 is installed on the machine base 10, and the second gear 25 is transmission-connected with the first gear 22, so that the first motor 23 can drive the nut 21 to rotate, and the nut 21 drives the screw rod 24 to move up and down.

[0028] The rotating module 30 is arranged on the screw rod 24, and the screw rod 24 can drive the rotating module 30 to move up and down. The rotating module 30 includes a rivet head 31, a rotating shaft 32 and a second motor 33. The second motor 33 can be a servo motor. The screw rod 24 is provided with an axial hole 241 extending up and down. The rotating shaft 32 can be rotatably penetrated in the axial hole 241. The lower end of the rotating shaft 32 is connected to the rivet head 31, and the upper end of the rotating shaft 32 is connected to the main shaft of the second motor 33. Among them, the rivet head 31 is an existing Changshu technology, so it is not repeated here.

[0029] The second gear 25 is connected to the first gear 22 via a transmission member 26. Specifically, the first gear 22 and the second gear 25 are both synchronous pulleys, and the transmission member 26 is a synchronous belt. It can be understood that the first gear 22 and the second gear 25 can also be bevel gears, and the transmission member 26 can be a transmission shaft.

[0030] A connecting ring 27 is provided between the nut 21 and the first gear 22. The first gear 22 is mounted on the upper end of the connecting ring 27. The first gear 22 has an avoidance hole 221 for the screw rod 24 to pass through. The nut 21 is mounted on the lower end of the connecting ring 27. By providing the connecting ring 27, the first gear 22 and the nut 21 are respectively installed on the upper and lower ends of the connecting ring 27, so as to realize the connection between the first gear 22 and the nut 21. The nut 21 and the connecting ring 27 can adopt an interference fit or a spline clamping or clamping method. The first gear 22 and the connecting ring 27 can be fixedly connected by screws, which is convenient for assembly.

[0031] An outer sleeve 13 is provided on the machine base 10, and an inner sleeve 28 is provided at the lower end of the screw rod 24. The inner sleeve 28 can be slidably sleeved in the outer sleeve 13 up and down, and the inner sleeve 28 can move up and down with the screw rod 24, and the rotating shaft 32 can be rotatably penetrated in the inner sleeve 28; by arranging the inner sleeve 28 at the lower end of the screw rod 24, the inner sleeve 28 can be slidably sleeved in the outer sleeve 13 on the machine base 10 up and down, and the rotating shaft 32 can be rotatably penetrated in the inner sleeve 28, and the guiding effect between the inner sleeve 28 and the outer sleeve 13 is utilized to make the screw rod 24 more stable and smooth when moving up and down, thereby improving the rotary riveting effect.

[0032] The lower end of the screw rod 24 is provided with a connecting protrusion 242, and the upper end of the inner sleeve 28 is provided with a first connecting groove 281. The connecting protrusion 242 is embedded in the first connecting groove 281 to connect the screw rod 24 with the inner sleeve 28. Specifically, the connecting protrusion 242 and the inner sleeve 28 can be connected by interference fit or by screws. By providing the connecting protrusion 242 and the first connecting groove 281, the connecting protrusion 242 is embedded in the first connecting groove 281, so that the connection between the screw rod 24 and the inner sleeve 28 is more compact.

[0033] A first bearing 282 is provided in the first connecting groove 281, a second connecting groove 283 is provided at the lower end of the inner sleeve 28, a second bearing 284 is provided in the second connecting groove 283, and the rotating shaft 32 is rotatably connected with the first bearing 282 and the second bearing 284; by respectively arranging the first bearing 282 and the second shaft hole 241 at the upper and lower ends of the inner sleeve 28, the rotating shaft 32 is rotatably connected with the first bearing 282 and the second bearing 284, so that the rotating shaft 32 has two supporting points, and the rotating shaft 32 rotates more stably to prevent shaking.

[0034] The machine base 10 is also provided with a guide assembly 40, which includes a guide seat 41 and a plurality of guide rods 42. The guide rods 42 are connected to the machine base 10, and the guide seat 41 is slidably arranged on the guide rods 42 up and down. The upper end of the screw rod 24 is connected to the guide seat 41, and the second motor 33 is arranged on the guide seat 41; by setting the guide assembly 40 composed of the guide seat 41 and the plurality of guide rods 42, the screw rod 24 and the second motor 33 are both connected to the guide seat 41, and the cooperation between the guide seat 41 and the guide rod 42 is utilized to realize the up and down movement of the screw rod 24 relative to the machine base 10, and limit the rotation of the screw rod 24, and when the nut 21 rotates, the screw rod 24 can be driven to move up and down, thereby making the screw rod 24 drive the rotating module 30 to move up and down. The structure of the guide assembly 40 is reasonably arranged, and the screw rod 24 and the second motor 33 are connected to the guide seat 41, so that the screw rod 24 and the rotating module 30 can move up and down synchronously.

[0035] The guide seat 41 is provided with a connecting arm 43 corresponding to the guide rod 42 one by one, and the connecting arm 43 is provided with a guide sleeve 44, and the guide sleeve 44 is slidably connected to the guide rod 42 up and down; by arranging the connecting arm 43 on the guide seat 41, the connecting arm 43 is slidably connected to the guide rod 42 through the guide sleeve 44. During assembly, the guide seat 41 can be first connected and fixed to the screw rod 24, and then the guide sleeve 44 can be installed on the connecting arm 43, and then the guide sleeve 44 can be sleeved on the guide rod 42, and finally the connecting arm 43 can be connected to the guide seat 41, which is convenient for assembly.

[0036] The connecting arm 43 is provided with a long hole (not shown), and the length direction of the long hole is the same as the radial direction of the guide rod 42. The guide seat 41 is provided with a connecting hole 411, and the bolts pass through the long hole and the connecting hole 411 in sequence to install the connecting arm 43 on the guide seat 41; when the guide seat 41 is connected to the screw rod 24 and the guide sleeve 44 is connected to the guide rod 42, the relative position of the connecting arm 43 and the guide seat 41 is fixed. By setting the long hole and the connecting hole 411, it is ensured that the long hole corresponds to the connecting hole 411, and then the connecting arm 43 can be connected and fixed to the guide seat 41 by bolts.

[0037] The working principle of the utility model is as follows: the second motor 33 drives the rotating shaft 32 to rotate, the rotating shaft 32 drives the rivet head 31 to rotate, the rivet head 31 drives the pressure rod 311 to rotate (the axis of the pressure rod 311 is not parallel to the axis of the rotating shaft 32), the first motor 23 drives the second gear 25 to rotate, the second gear 25 drives the first gear 22 to rotate through the transmission member 26, the first gear 22 drives the connecting ring 27 and the nut 21 to rotate synchronously, the nut 21 drives the screw rod 24 to move downward, the screw rod 24 drives the guide seat 41, the inner sleeve 28, the rotating shaft 32, the rivet head 31 and the second motor 33 to move downward synchronously, the pressure rod 311 presses the rivet downward, during the rotation of the rivet head 31, the pressure rod 311 makes a conical motion, and the pressure rod 311 crushes and deforms the rivet to rivet the workpiece.

[0038] In summary, the utility model is provided with a lifting module 20 consisting of a nut 21, a first gear 22, a second gear 25, a first motor 23 and a screw rod 24. The nut 21 is rotatably connected to the base 10, the first gear 22 is mounted on the nut 21, the second gear 25 is mounted on the main shaft of the first motor 23, the screw rod 24 is threadedly connected to the nut 21, the screw rod 24 can be movably connected to the base 10 up and down along its own axial direction, the rotating module 30 is arranged on the screw rod 24 and can be driven by the screw rod 24 to move up and down, the rotating shaft 32 on the rotating module 30 is rotatably penetrated into the shaft hole 241 on the screw rod 24, when working, the second motor 33 can drive the rotating shaft 32 to rotate in the shaft hole 241, and the rotating shaft 32 drives the rivet head 31 to rotate; the first motor The machine 23 drives the nut 21 to rotate through the cooperation of the second gear 25 and the first gear 22, and the nut 21 drives the screw rod 24 to move downward, so that the screw rod 24 drives the rotating module 30 to move downward to realize the riveting work. The lifting module 20 of the screw rod 24 + motor is adopted. The screw rod 24 can drive the rotating module 30 to move downward steadily and at a uniform speed, so as to avoid excessive impact force of the riveting head 31 on the rivet in a short time, so that the rivet is deformed evenly and the riveting effect is better; in addition, the rotating shaft 32 is arranged to rotate and penetrate the shaft hole 241 of the screw rod 24, so that the screw rod 24 and the rotating shaft 32 are coaxially arranged, and the downward pressure output by the screw rod 24 is concentrated on the axis of the rotating shaft 32, so that the pressure rod 311 on the riveting head 31 is more uniform when pressing the rivet, and the riveting effect is further improved.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made to the above embodiment based on the technical practice of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A rotary riveting mechanism, comprising a base, and a lifting module and a rotating module arranged on the base, characterized in that: The lifting module includes a nut, a first gear, a second gear, a first motor and a screw rod, the nut is rotatably connected to the base, the first gear is mounted on the nut, the second gear is mounted on the main shaft of the first motor, the screw rod is threadedly connected to the nut, the screw rod can be movably connected to the base up and down along its own axial direction, and the second gear is transmission-connected to the first gear, so that the first motor can drive the nut to rotate, and the nut drives the screw rod to move up and down; The rotating module is arranged on the screw rod, and the screw rod can drive the rotating module to move up and down. The rotating module includes a rotary rivet head, a rotating shaft and a second motor. The screw rod is provided with an axial hole extending up and down. The rotating shaft can be rotatably passed through the axial hole. The lower end of the rotating shaft is connected to the rotary rivet head, and the upper end of the rotating shaft is connected to the main shaft of the second motor.

2. The riveting mechanism according to claim 1, characterized in that: The machine base is also provided with a guide assembly, which includes a guide seat and a plurality of guide rods. The guide rods are connected to the machine base, the guide seat is slidably arranged on the guide rods, the upper end of the screw rod is connected to the guide seat, and the second motor is arranged on the guide seat.

3. The riveting mechanism according to claim 2, characterized in that: The guide seat is provided with a connecting arm corresponding to the guide rod one by one, the connecting arm is provided with a guide sleeve, and the guide sleeve is connected to the guide rod in an up-and-down sliding manner.

4. The riveting mechanism according to claim 3, characterized in that: The connecting arm is provided with a long hole, the length direction of the long hole is the same as the radial direction of the guide rod, the guide seat is provided with a connecting hole, and the bolt passes through the long hole and the connecting hole in sequence so that the connecting arm is installed on the guide seat.

5. The riveting mechanism according to claim 1, characterized in that: An outer sleeve is arranged on the machine base, an inner sleeve is arranged at the lower end of the screw rod, the inner sleeve can be slidably sleeved in the outer sleeve up and down, and the inner sleeve can move up and down with the screw rod, and the rotating shaft can be rotatably inserted into the inner sleeve.

6. The riveting mechanism according to claim 5, characterized in that: The lower end of the screw rod is provided with a connecting protrusion, and the upper end of the inner sleeve is provided with a first connecting groove, and the connecting protrusion is embedded in the first connecting groove to connect the screw rod with the inner sleeve.

7. The riveting mechanism according to claim 6, characterized in that: A first bearing is disposed in the first connecting groove, a second connecting groove is disposed at the lower end of the inner sleeve, a second bearing is disposed in the second connecting groove, and the rotating shaft is rotatably connected to the first bearing and the second bearing.

8. The riveting mechanism according to claim 1, characterized in that: The second gear is transmission-connected to the first gear via a transmission member.

9. The riveting mechanism according to claim 8, characterized in that: The first gear and the second gear are both synchronous pulleys, and the transmission member is a synchronous belt.

10. The riveting mechanism according to any one of claims 1 to 9, characterized in that: A connecting ring is provided between the nut and the first gear, the first gear is mounted on the upper end of the connecting ring, the first gear has an avoidance hole for the screw rod to pass through, and the nut is mounted on the lower end of the connecting ring.

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