Servo-riveting gun

Abstract

The embodiment of the present application discloses a servo rivet gun, which comprises a shell, a bearing seat is installed on the shell, a speed reducer is installed on the bearing seat, a motor is connected with the speed reducer, a gear of the speed reducer is engaged with a nut gear, the nut gear is connected with a lead screw, the nut gear is installed on an end face flange, the end face flange is connected with the bearing seat, a sensor is installed on the other end of the end face flange, an axle sleeve is installed at the end of the lead screw, the end of the waste pipe is located in the axle sleeve, a reset spring is arranged between the end of the lead screw and one end of the waste pipe, one end of the waste pipe is connected with a negative pressure generator, the front end of the axle sleeve is connected with a pull claw base, the front end of the pull claw base is installed in a guide pipe, a clamping claw is arranged in the pull claw base, the rear end of the clamping claw is connected with the waste pipe, a protective sleeve is arranged outside the lead screw on the outside of the sensor, a feeding pipe joint is arranged above the protective sleeve, and the front end of the guide pipe is installed on the claw base. The present application realizes the monitoring and control of the rivet riveting force and position, and guarantees the stability of product quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of riveting tools, in particular to a servo rivet gun. BACKGROUND

[0002] The riveting is a kind of riveting method that special rivets are deformed by special tools to rivet the riveting parts by using manual or compressed air as power, and it belongs to a kind of cold riveting. According to the power type, the rivet gun is divided into several types such as electric, manual and pneumatic. When the hydraulic rivet gun is used, it is difficult to monitor and control the riveting force and its position each time, and the product quality is difficult to control. The space required for installation is also relatively large. With the development of automobiles, electric vehicles are developing rapidly, and the core of electric vehicles, i.e. batteries, are also important parts. The cost of batteries accounts for more than half of the cost of the whole vehicle. At present, the battery pack needs to be riveted during production, and the battery pack is a relatively precise product. The traditional hydraulic rivet gun cannot accurately control it, and a large space is required. When riveting some parts, due to the inconsistent thickness of the parts or the different installation positions of the parts, the surface to be riveted is not a plane, and the traditional rivet gun cannot be finely adjusted. The forward stroke of the rivet gun driven by other mechanisms is fixed, which may cause the rivet gun to be damaged or the riveting effect to be poor. SUMMARY

[0003] The present application provides a kind of servo rivet gun, realize the monitoring and control of rivet riveting force and position, guarantee the stability of product quality.

[0004] To achieve the above object, the present application provides the following technical scheme:

[0005] The servo rivet gun comprises a motor, a speed reducer, a negative pressure generator, a nut gear and a shell. A bearing seat is installed on the shell. The speed reducer is installed on the bearing seat. The motor is connected with the speed reducer. The gear of the speed reducer is engaged with the nut gear. The nut gear is connected with a lead screw. The nut gear is installed on an end face flange. The end face flange is connected with the bearing seat. The other end of the end face flange is installed with a sensor. The lead screw is located at the center of the shell. The end of the lead screw is installed with a shaft sleeve. The end of a waste pipe is located in the shaft sleeve. A return spring is arranged between the end of the lead screw and the end of the waste pipe. The return spring is located in the shaft sleeve. The waste pipe passes through the lead screw. The end of the waste pipe is connected with the negative pressure generator. The front end of the shaft sleeve is connected with a claw holder. The front end of the claw holder is installed in a guide pipe. The inside of the claw holder is provided with a clamping jaw. The rear end of the clamping jaw is connected with the waste pipe. A protective sleeve is arranged outside the lead screw on the side of the sensor. A feeding pipe joint is arranged above the protective sleeve. A feeding pipe is installed on the feeding pipe. The front end of the guide pipe is installed on a jaw holder. The front end of the jaw holder is connected with a rivet holder.

[0006] Preferably, the floating mechanism comprises a flange, a sliding block, a guide rail, a pressing plate and a spring, the guide rail is installed on the shell, the sliding block is in sliding connection with the guide rail, the flange is installed on the sliding block, the pressing plate is installed on one side of the flange, and the spring is arranged between the pressing plate and the bearing seat.

[0007] Preferably, the shell further comprises a cover plate, the cover plate is installed on one side of the shell, and a top surface of the cover plate is located at an end surface of the sliding block.

[0008] Preferably, the shell further comprises a stopper, the stopper is installed on the bearing seat, and the stopper is located on one side of the pressing plate.

[0009] Preferably, the stopper is T-shaped, the stopper comprises an installation part and a blocking part, the installation part is installed on the bearing seat through two bolts, and the blocking part faces the pressing plate.

[0010] Preferably, the negative pressure generator is installed on the cover plate.

[0011] Preferably, the negative pressure generator is installed on the cover plate through a suction pipe joint, an O-shaped ring is arranged on the suction pipe joint, the negative pressure generator is connected with the suction pipe joint through a locking nut, and an air pipe joint is arranged on the negative pressure generator.

[0012] Preferably, the feeding pipe is in an inclined state, and the lead screw is in a horizontal state.

[0013] Compared with the prior art, the application has the following beneficial effects:

[0014] In the process of the rivet, the real-time tension is monitored through the rear sensor, the position is monitored through the servo motor encoder, the force curve and the position curve are drawn on the upper computer, and thus the product quality is controlled; and through the floating mechanism, the riveting problem caused by different workpiece thicknesses is greatly reduced.

[0015] The application realizes integration and miniaturization, greatly improves the product quality and reduces the required installation space. DETAILED DESCRIPTION

[0016] Figure 1 is an embodiment schematic view of the application.

[0017] Figure 2 is another perspective view of the embodiment of the application.

[0018] Figure 3 is a bottom view of the embodiment of the application.

[0019] Figure 4 is Figure 3 is an A-A sectional view of the application.

[0020] Figure 5 is a sectional view when the rivet is fed.

[0021] Figure 6 is a partial view of an embodiment of the application.

[0022] Figure 7 is a partial cross-sectional view of an embodiment of the application.

[0023] Figure 8 is a combined view of a claw seat and rivet seat of an embodiment of the application. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the application will be apparently and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0025] As shown in the figure, the application discloses a servo rivet gun, which comprises a motor 1, a speed reducer 2, a negative pressure generator 3, a nut gear 4 and a shell 5. The shell 5 is provided with a bearing seat 6, the speed reducer 2 is installed on the bearing seat 6, the motor 1 is connected with the speed reducer 2, the gear of the speed reducer 2 is engaged with the nut gear 4, the nut gear 4 is connected with a lead screw 7, the nut gear 4 drives the lead screw 7 to move horizontally, the nut gear 4 is installed on an end face flange 8, the end face flange 8 is connected with the bearing seat 6, the other end of the end face flange 8 is provided with a sensor 9, the lead screw 7 is located at the center of the shell 5, the end of the lead screw 7 is provided with a shaft sleeve 10, the end of a waste pipe 11 is located in the shaft sleeve 10, a return spring 12 is arranged between the end of the lead screw 7 and the end of the waste pipe 11, the return spring 12 is located in the shaft sleeve 10, the lead screw 7 drives the shaft sleeve 10 to move, the waste pipe 11 passes through the lead screw 7, the end of the waste pipe 11 is connected with the negative pressure generator 3, the waste pipe 11 is used for discharging waste, the front end of the shaft sleeve 10 is connected with a claw seat 12, the shaft sleeve 10 drives the claw seat 13 to move, the front end of the claw seat 13 is installed in a guide pipe 14, the inside of the claw seat 12 is provided with a clamping jaw 15, the rear end of the clamping jaw 15 is connected with the waste pipe 11, a protective sleeve 16 is arranged outside the lead screw on the side of the sensor 9, a feeding pipe joint 17 is arranged above the protective sleeve 16, a feeding pipe 18 is installed on the feeding pipe joint 17, the front end of the guide pipe 14 is installed on a claw seat 19, the front end of the claw seat 19 is connected with a rivet seat 20.

[0026] The motor 1 herein is a servo motor.

[0027] The application creatively uses the servo motor 1 to drive the speed reducer 2, the speed reducer 2 drives the nut gear 4 to rotate through the upper gear of the speed reducer, and the nut gear 4 drives the lead screw 7 to realize feeding and contraction.

[0028] In an embodiment of the present application, the floating mechanism comprises the flange 21, the sliding block 22, the guide rail 23, the pressing plate 24 and the spring 25, the guide rail 23 is installed on the shell 5, the sliding block 22 is in sliding connection with the guide rail 23, the flange 21 is installed on the sliding block 22, the pressing plate 24 is installed on one side of the flange 21, and the spring 25 is arranged between the pressing plate 24 and the bearing seat 6.

[0029] The whole structure of the present application is connected with other power mechanisms through the flange 21, and the other power mechanisms drive the flange 21 to move, and then drive the whole structure of the present application to move to the riveting position. In this way, there are multiple workpieces to be riveted, and the outer surfaces of the workpieces are not necessarily in the same plane. For example, the thicknesses of the workpieces are different, and the positions of the workpieces of the same model are different, so that the surfaces to be riveted are not in the same plane. The front end displacement of the riveting gun can be floated to a certain extent due to the presence of the floating mechanism, instead of being directly pressed against the workpieces with different end surfaces. The displacement of the riveting gun driven by other mechanisms is set in advance and will not change due to the changes of the outer surfaces of the workpieces. The present application avoids the changes through the floating mechanism. Of course, the plane difference of the workpieces to be riveted by the present application cannot be too large.

[0030] The shell 5 can slide on the sliding block 22 by a certain distance along the guide rail 23, so as to realize floating. The spring 25 plays a resetting role.

[0031] In an embodiment of the present application, the cover plate 26 is installed on one side of the shell 5, and the top surface of the cover plate 26 is located at the end surface of the sliding block 22. The cover plate 26 plays a limiting role to limit the displacement of the guide rail 23 on the sliding block 22.

[0032] In an embodiment of the present application, the stopper 27 is installed on the bearing seat 6 and located on one side of the pressing plate 24. The stopper 27, like the cover plate 26, plays a limiting role to limit the displacement of the guide rail 23 on the sliding block 22.

[0033] In an embodiment of the present application, the stopper 27 is T-shaped and comprises the mounting portion 271 and the blocking portion 272. The mounting portion 271 is installed on the bearing seat 6 through two bolts, and the blocking portion 272 faces the pressing plate 24.

[0034] In an embodiment of the present application, the negative pressure generator 3 is installed on the cover plate 26.

[0035] In an embodiment of the present application, the negative pressure generator 3 is installed on the cover plate 26 through the suction pipe joint 28, the suction pipe joint 28 is provided with an O-shaped ring, the negative pressure generator 3 is connected with the suction pipe joint 28 through the locking nut 29, and the air pipe joint 30 is arranged on the negative pressure generator 3.

[0036] The present application sucks the rivet 31 at the clamping jaw by the suction force generated by the rear suction pipe joint 28, and pushes the rivet 31 out of the rivet seat 20. The servo motor 1 controls the feeding amount of the lead screw 7, and the reset spring 12 opens the clamping jaw 15. The suction force generated by the suction pipe joint 28 sucks the tail of the rivet 31 into the clamping jaw 15 until the bottom surface of the rivet 31 is in contact with the rivet seat 20. At this time, the motor 1 is reversed, the lead screw 7 is fed in reverse, and the clamping jaw 15 is retracted, completing the pull riveting. The motor 1 is turned on, the clamping jaw 14 is loosened, and the discharge of waste is completed. During the process of pulling the rivet, the real-time pulling force is monitored by the rear sensor 9, the position is monitored by the servo motor encoder, and the force curve and the position curve are drawn on the upper computer, so as to realize the control of the product quality.

[0037] In an embodiment of the present application, the feeding pipe 18 is in an inclined state, and the lead screw 7 is in a horizontal state. The rivet 31 enters from the feeding pipe 18.

[0038] The above is only an example and description of the structure of the present application. Those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace, as long as they do not deviate from the structure of the present application or exceed the scope defined by the present claims, which should belong to the protection scope of the present application.

Claims

1. Servo rivet gun, characterized by: It includes a motor, a reducer, a negative pressure generator, a nut gear and a housing. A bearing seat is installed on the housing, the reducer is installed on the bearing seat, the motor is connected to the reducer, the reducer gear is meshed with the nut gear, the nut gear is connected to the lead screw, the nut gear is installed on the end face flange, the end face flange is connected to the bearing seat, a sensor is installed on the other end of the end face flange, the lead screw is located in the center of the housing, a shaft sleeve is installed at the end of the lead screw, the end of the waste pipe is located in the shaft sleeve, a reset spring is provided between the end of the lead screw and one end of the waste pipe, the reset spring is located in the shaft sleeve, the waste pipe passes through the lead screw, and one end of the waste pipe is connected to the negative pressure generator. The front end of the sleeve is connected to the claw seat, the front end of the claw seat is installed in the guide tube, the interior of the claw seat is provided with a clamping claw, the rear end of the clamping claw is connected to the waste tube, a sheath is provided outside the lead screw located outside the sensor, a feed pipe joint is provided above the sheath, the feed pipe is installed on the feed pipe joint, the front end of the guide tube is installed on the claw seat, the front end of the claw seat is connected to the rivet seat, and also includes a floating mechanism, the floating mechanism includes a flange, a slider, a guide rail, a pressure plate and a spring, the guide rail is installed on the housing, the slider is slidably connected to the guide rail, the flange is installed on the slider, the pressure plate is installed on one side of the flange, and a spring is provided between the pressure plate and the bearing seat.

2. The servo rivet gun according to claim 1, characterized in that: The housing further comprises a cover plate which is mounted on one side of the housing, and a top surface of the cover plate is located at the end surface of the slider.

3. The servo rivet gun according to claim 1, characterized in that: The utility model also comprises a stopper, which is arranged on the bearing seat and is located on one side of the pressure plate.

4. The servo rivet gun according to claim 3, characterized in that: The stopper is T-shaped and includes a mounting portion and a blocking portion. The mounting portion is mounted on the bearing seat by two bolts, and the blocking portion faces the pressure plate.

5. The servo rivet gun according to claim 2, characterized in that: The negative pressure generator is installed on the cover plate.

6. The servo rivet gun according to claim 5, characterized in that: The negative pressure generator is installed on the cover plate through a suction pipe joint, an O-ring is installed on the suction pipe joint, the negative pressure generator and the suction pipe joint are connected through a locking nut, and the air pipe joint is arranged on the negative pressure generator.

7. The servo rivet gun according to claim 1, characterized in that: The feed pipe is in an inclined state and the lead screw is in a horizontal state.

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