Electromagnetic riveting gun based on series excited motor

Abstract

The utility model relates to the technical field of electromagnetic riveting, especially relates to a kind of electromagnetic riveting gun based on series excited motor. Including gun body shell, riveting punch being set in the front end of gun body shell in through, and driving assembly integrated in the inside of gun body shell. Driving assembly includes series excited linear motor, its stator coaxial sleeve is set in the outside of rotor, rotor excitation coil in rotor and stator excitation coil in stator are connected in series between, and the reciprocating linear motion of rotor along axial is made by the excitation magnetic field coupling between the two. The rear end of riveting punch is connected to the front end of rotor, to convert the thrust of rotor into the impact pressure required when riveting. This electromagnetic riveting gun structure is simple, and stability is high, has the power output of high efficiency strong, can satisfy the riveting demand of high strength, simultaneously possess the characteristics of high speed and high accuracy, series excited linear motor is small in size, is integrated in the inside of gun body, need not additional drive electric cabinet, improve the portability of equipment whole, easy to operate and maintain.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic riveting technology, and in particular to an electromagnetic riveting gun based on a series excitation motor. Background Technology

[0002] In modern industrial manufacturing, electromagnetic riveting, as a highly efficient and precise joining process, is widely used in aerospace, automotive manufacturing, machining, and many other fields. However, traditional electromagnetic riveting equipment has certain limitations in power control and operational precision. For example, its power unit typically uses induction electromagnetic principles, resulting in low energy efficiency, insufficient power output, and difficulty in combining high speed with high precision. Furthermore, its large size hinders portable operation. During the riveting process, insufficient precision in controlling the riveting stroke and force can lead to unstable riveting quality, affecting the connection strength and accuracy of the workpiece. Moreover, traditional equipment has a limited power supply options, making it inconvenient to use in scenarios without external power or requiring mobile operation.

[0003] Therefore, there is an urgent need for an electromagnetic riveting gun that has strong power output, high riveting precision, reliable riveting quality, high portability, and is easy to operate. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides an electromagnetic riveting gun based on a series motor, which solves the technical problems of low energy efficiency, insufficient power output and low control precision of traditional electromagnetic riveting equipment.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] This utility model provides an electromagnetic riveting gun based on a series-wound motor, including a gun body shell, a riveting punch extending through the front end of the gun body shell, and a drive assembly integrated inside the gun body shell. The drive assembly includes a series-wound linear motor, which includes a mover and a stator coaxially sleeved outside it. The mover excitation coil in the mover and the stator excitation coil in the stator are connected in series, and the mover reciprocates linearly along the axial direction through the magnetic field coupling between them. The rear end of the riveting punch is connected to the front end of the mover to convert the thrust of the mover into the impact pressure applied by the riveting punch during riveting.

[0009] Optionally, the stator includes a stator housing connected inside the gun body housing for winding the stator excitation coil, and the mover includes a mover core for winding the mover excitation coil. The rear end of the riveting punch is connected to the front end of the mover core via a force transmission rod. The number of mover excitation coils is always one less than the number of stator excitation coils, and both are arranged axially. Each set of mover excitation coils is located at the midpoint of the axial direction of two adjacent sets of stator excitation coils to form an I-shaped arrangement, and the mover excitation coils partially overlap with the stator excitation coils on both sides in the axial direction.

[0010] Optionally, the outer peripheral wall of the mover core is provided with axially arranged mover winding slots that match the number and position of the mover excitation coils, and the mover excitation coils are wound in the mover winding slots. The inner peripheral wall of the stator housing is provided with axially arranged stator winding slots that match the number and position of the stator excitation coils, and the stator excitation coils are wound in the stator winding slots. The number of mover excitation coils is between 2 and 5 sets, and the number of stator excitation coils is between 3 and 6 sets.

[0011] Optionally, the drive assembly also includes a linear guide rail fixed to the inner wall of the gun body housing, and the rear end of the mover is connected to the linear guide rail via a mover connecting seat. The front end of the series-wound linear motor is provided with a linear bearing sleeved on the force transmission rod, and the linear bearing and the linear guide rail together limit the movement of the mover.

[0012] Optionally, an energy-absorbing spring is provided between the mover connecting seat and the inner wall of the gun body shell to buffer the movement of the mover.

[0013] Optionally, a first connecting plate is provided at the top of the inner wall of the gun body shell, and a second connecting plate is provided at the front end of the stator shell. The first and second connecting plates are arranged perpendicularly and fixedly connected at their intersection. The linear guide rail is fixed to the inner wall of the gun body shell via the first connecting plate, and the stator shell is fixed to the inner wall of the gun body shell via the second connecting plate. The first connecting plate, the second connecting plate, the stator shell, and the mover connecting seat together form a frame structure for the drive assembly.

[0014] Optionally, the system also includes a control component integrated inside the gun housing. This control component includes an ARM driver board, and a displacement sensor, an attitude measurement sensor, and a three-dimensional force sensor electrically connected to the ARM driver board. The displacement sensor corresponds to the position of the mover and is fixedly mounted on the inner wall of the gun housing. The three-dimensional force sensor is located at the front end of the gun housing and is fixedly connected to the riveting punch.

[0015] Optionally, the control component also includes a kinetic braking resistor, which is electrically connected to the ARM driver board and is connected in parallel to the DC bus inside the gun body housing.

[0016] Optionally, it also includes a cooling fan, which is integrated inside the gun body shell and located at the rear end of the drive assembly. At the same time, several heat dissipation holes communicating with the outside are provided on the inner wall of the gun body shell, so that the cooling fan can form a circulating heat dissipation inside the gun body shell.

[0017] Optionally, it also includes a power supply assembly that supplies power to the electromagnetic riveting gun via a power interface located at the bottom of the gun housing. The power supply assembly includes a battery module and an external power cord.

[0018] (III) Beneficial Effects

[0019] The beneficial effects of this utility model are:

[0020] This invention relates to an electromagnetic riveting gun based on a series-wound motor. It uses a series-wound linear motor instead of the discharge coil in traditional induction electromagnetic riveting as the main power unit. This fully utilizes the high efficiency and high starting thrust of the series-wound motor, and the ability to control the driving force through current adjustment. The excitation magnetic field coupling between the mover excitation coil in the mover and the stator excitation coil in the stator causes the mover to reciprocate linearly along the axial direction. The riveting punch is directly fixed to the mover to convert the mover's thrust into the required riveting pressure. This direct-drive connection structure has significant advantages: high energy efficiency, efficiently converting electrical energy into power without the need for other force transmission components, a simpler structure, higher stability, and more precise force transmission. It provides efficient and powerful power output to meet high-strength riveting requirements, while also possessing high speed and high precision. Furthermore, the series-wound linear motor is small in size, making it easy to integrate inside the gun body without the need for an additional drive cabinet, improving the overall portability of the equipment and making it easy to operate and maintain. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the appearance of an embodiment 1 of the electromagnetic riveting gun based on a series motor of the present invention;

[0022] Figure 2 for Figure 1 Internal diagram of the electromagnetic riveting gun in the image;

[0023] Figure 3 for Figure 1 A cross-sectional view of the electromagnetic riveting gun in the image;

[0024] Figure 4 This is a schematic diagram showing the connection between an embodiment 2 of the electromagnetic riveting gun based on a series motor and a battery module.

[0025] [Explanation of Labels in the Attached Image]

[0026] 1: Gun body outer shell; 11: First connecting plate; 12: Second connecting plate;

[0027] 2: Riveting punch;

[0028] 3: Drive assembly; 31: Mover excitation coil; 32: Stator excitation coil; 33: Stator housing; 34: Mover core; 35: Force transmission rod; 36: Linear guide rail; 37: Mover connecting seat; 38: Linear bearing; 39: Energy absorbing spring;

[0029] 4: Control components; 41: ARM driver board; 42: Displacement sensor; 43: Three-dimensional force sensor; 44: Kinetic braking resistor;

[0030] 5: Cooling fan; 51: Ventilation holes;

[0031] 6: Power supply components; 61: Battery module;

[0032] 7: Indicator lights;

[0033] 8: Human-computer interface;

[0034] 9: Operation buttons;

[0035] 10: Trigger switch. Detailed Implementation

[0036] To better explain and facilitate understanding of this utility model, a detailed description of its specific embodiments is provided below with reference to the accompanying drawings. In this document, directional terms such as "upper," "lower," "left," and "right" are used interchangeably. Figure 1 The orientation is used as a reference.

[0037] This utility model proposes an electromagnetic riveting gun based on a series-wound motor. It uses a series-wound linear motor instead of a traditional induction motor as the main power unit of the riveting gun. This fully utilizes the high efficiency, high starting thrust, and controllable driving force of the series-wound motor through current adjustment. The excitation magnetic field coupling between the mover excitation coil in the mover and the stator excitation coil in the stator causes the mover to reciprocate linearly along the axial direction. The riveting punch is directly fixed to the mover to convert the mover's thrust into the required riveting pressure. This direct-drive connection structure has significant advantages: high energy efficiency, efficiently converting electrical energy into power without the need for other force transmission components, a simpler structure, higher stability, and more precise force transmission. It provides efficient and powerful power output to meet high-strength riveting requirements, while also possessing high speed and high precision. Furthermore, the series-wound linear motor is small in size, making it easy to integrate inside the gun body without the need for an additional drive cabinet, improving the overall portability of the equipment and making it easy to operate and maintain.

[0038] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0039] Example 1:

[0040] Reference Figures 1 to 3 This embodiment proposes an electromagnetic riveting gun based on a series-wound motor, including a gun body shell 1, a riveting punch 2, and a drive assembly 3. The riveting punch 2 is disposed through the front end of the gun body shell 1 and is used to directly apply force to the rivet. The drive assembly 3 is integrated inside the gun body shell 1 and connected to the riveting punch 2, and is used to provide the impact pressure required during riveting. The drive assembly 3 includes a series-wound linear motor, which includes a mover and a stator coaxially sleeved on its exterior.

[0041] The mover includes a mover excitation coil 31 and a mover core 34 for winding the mover excitation coil 31. On the outer peripheral wall of the mover core 34, axially arranged mover winding slots are provided, matching the number and position of the mover excitation coils 31. The mover excitation coils 31 are wound within these movingr winding slots. The rear end of the riveting punch 2 is connected to the front end of the mover to convert the thrust of the mover into the impact pressure applied by the riveting punch 2 during riveting. In this embodiment, the rear end of the riveting punch 2 is connected to the front end of the mover core 34 via a force transmission rod 35. The movement between the riveting punch 2 and the mover needs to maintain a high degree of consistency; therefore, the force transmission rod 35 and the mover core 34 can be fixed by threaded connection or welding to form a rigid connection. The connection between the force transmission rod 35 and the riveting punch 2 can also be fixed by welding. Of course, it is not limited to this. The force transmission rod 35 and the riveting punch 2 can also be set as an integrated structure. Those skilled in the art can make adjustments according to actual needs, as long as the thrust obtained by the moving core 34 can be completely transmitted to the riveting punch 2.

[0042] The stator includes a stator excitation coil 32 and a stator housing 33 for winding the stator excitation coil 32. On the inner peripheral wall of the stator housing 33, stator winding slots are provided axially, corresponding to the number and position of the stator excitation coils 32, and the stator excitation coils 32 are wound within these slots. The stator housing 33 is connected to the interior of the gun body housing 1.

[0043] The mover excitation coil 31 in the mover and the stator excitation coil 32 in the stator are connected in series. The excitation magnetic field coupling between the two causes the mover to reciprocate linearly along the axial direction, which in turn drives the riveting punch 2 to reciprocate linearly in sync. This structure no longer relies on traditional permanent magnets to generate a magnetic field, effectively reducing the manufacturing cost of the motor and avoiding assembly and failure problems related to permanent magnets. The mover excitation coil 31 and the stator excitation coil 32 form a closed loop through series connection. When current flows through the series coils, magnetic fields are generated on the stator and mover respectively. The interaction (attraction or repulsion) between the two directly drives the mover, forming a direct-drive structure. The movement of the mover is directly driven by electromagnetic force, without the need for intermediate conversion mechanisms such as gears and connecting rods. The series connection method also allows for a larger thrust output under the same current. Therefore, this series-wound linear motor has a simpler structure, higher stability, more precise force transmission, and a smaller size, making it easy to integrate into the gun body without the need for an additional drive cabinet, improving the overall portability of the equipment and making it easy to operate and maintain.

[0044] Furthermore, the number of mover excitation coils 31 is always one less than the number of stator excitation coils 32, and both are arranged axially. Each set of mover excitation coils 31 is positioned at the midpoint of the axial direction of two adjacent sets of stator excitation coils 32, forming an I-shaped arrangement. The mover excitation coils 31 partially overlap with the stator excitation coils 32 on both sides axially, with the overlap distance being 1 / 2 to 1 / 3 of the winding length of the mover excitation coil 31. This ensures that the side of the stator excitation coil 32 closest to the mover excitation coil 31 is within the magnetic field lines of the mover excitation coil 31. This coil arrangement makes the overall structure more compact, achieving a smaller size and greater portability while maintaining the same required thrust. Simultaneously, this coil arrangement also makes the magnetic circuit more compact, not only fully utilizing the magnetic field lines on both sides of the mover excitation coil 31 but also allowing it to operate beyond its limits without being limited by the saturation magnetic induction intensity of the mover core 34. Using this type of series-wound linear motor as the drive unit of a riveting gun provides efficient and powerful output, meeting the demands of high-intensity riveting. To better adapt to the range of impact pressures required by the electromagnetic riveting gun in actual use and to maximize its portability, the number of mover excitation coils 31 on the mover core 34 can be set between 2 and 5, and the number of stator excitation coils 32 on the stator housing 33 can be set between 3 and 6. By adjusting the number of coils and the number of turns, the thrust output of the motor under the same current can be adjusted. In this embodiment, it is preferable to set 2 sets of mover excitation coils 31 and 3 sets of stator excitation coils 32. With this configuration, the maximum output thrust of the series-wound linear motor can reach 40-50kN. The impact pressure required for aluminum rivets (φ4–φ6mm) is generally between 12-36kN, so this series-wound linear motor can easily meet the impact pressure required for aluminum rivets (φ4–φ6mm) and is convenient for manual operation.

[0045] To ensure the smooth movement of the riveting punch 2 during the riveting process and prevent non-linear movements such as rotation and wobbling of the mover, which could affect the normal operation of the riveting punch 2, the drive assembly 3 also includes a linear guide rail 36. The linear guide rail 36 is fixed to the inner wall of the gun body shell 1. The rear end of the mover is connected to the linear guide rail 36 through a mover connecting seat 37. The front end of the series-wound linear motor is provided with a linear bearing 38 sleeved on the force transmission rod 35. The linear bearing 38 and the linear guide rail 36 together limit the movement of the mover, preventing circumferential rotation or unstable linear movement of the mover. This ensures that the riveting punch 2 can perform precise reciprocating linear motion and guarantees the quality of the riveting operation.

[0046] Specifically, a first connecting plate 11 is fixedly connected to the top of the inner wall of the gun body shell 1, and a second connecting plate 12 is fixedly connected to the front end of the stator shell 33. The first connecting plate 11 and the second connecting plate 12 are arranged perpendicularly, and their perpendicular intersection point is fixedly connected. The linear guide rail 36 is then fixed to the inner wall of the gun body shell 1 via the first connecting plate 11, while the stator shell 33 is fixed to the inner wall of the gun body shell 1 via the second connecting plate 12. The first connecting plate 11 and the second connecting plate 12 not only establish a fixed connection structure between the drive assembly 3 and the gun body shell 1, fixing the series-wound linear motor and the linear guide rail 36 to the gun body shell 1, but also, together, the first connecting plate 11, the second connecting plate 12, the stator shell 33, and the mover connecting seat 37 form a stable frame structure for the drive assembly 3. During riveting operations, this effectively reduces the possibility of malfunctions such as abnormal noise, jamming, and wear caused by vibration between components. An energy-absorbing spring 39 is also provided between the mover connecting seat 37 and the inner wall of the gun body shell 1. The energy-absorbing spring 39 can play a certain buffering role for the movement of the mover.

[0047] The electromagnetic riveting gun in this embodiment also includes a control component 4 integrated inside the gun housing 1. The control component 4 includes an ARM driver board 41, a displacement sensor 42, an attitude measurement sensor, a three-dimensional force sensor 43, and a kinetic braking resistor 44. As is known, the ARM driver board 41 is a highly integrated driver and control motherboard with high-speed computing capabilities. Integrating the ARM driver board 41 inside the gun housing 1 eliminates the need for an additional driver cabinet, effectively improving the portability of the electromagnetic riveting gun. In this embodiment, the ARM driver board can adjust the magnitude and direction of the current in the stator excitation coil 32 and the mover excitation coil 31.

[0048] The displacement sensor 42 is electrically connected to the ARM driver board 41. The displacement sensor 42 is positioned to correspond to the position of the mover, and is thus fixed to the inner wall of the gun body housing 1. Preferably, it can be fixed to the first connecting plate 11 above the series-wound linear motor, as long as it is convenient for monitoring the position of the mover. The displacement sensor 42 is preferably a magnetic scale, which can provide high-precision position feedback information, with a positioning accuracy down to the micrometer level. The ARM driver board 41 can receive the information from the displacement sensor 42.

[0049] Both the attitude measurement sensor and the three-dimensional force sensor 43 are electrically connected to the ARM driver board 41. The attitude measurement sensor is installed inside the gun housing 1 to detect the attitude information of the gun body in real time. The three-dimensional force sensor 43 is installed at the front end inside the gun housing 1 and is fixedly connected to the riveting punch 2 to detect the direction of force when the riveting punch 2 contacts the rivet surface. The ARM driver board 41 can receive information from the attitude measurement sensor and the three-dimensional force sensor 43, and prompt the operator to hold the gun correctly through the indicator light 7 on the gun body and the human-machine interface 8, reducing riveting problems caused by gun posture deviation, and further improving the quality and stability of riveting. The attitude measurement sensor preferably adopts a nine-axis IMU (Inertial Measurement Unit), which integrates a gyroscope, accelerometer, and magnetometer, and can detect the angular velocity, acceleration, and electromagnetic field information of the object in real time to obtain the three-dimensional attitude of the object.

[0050] The kinetic energy braking resistor 44 is also electrically connected to the ARM drive control board 41. The kinetic energy braking resistor 44 is connected in parallel to the DC bus of the internal processing circuit of the gun body shell 1. It is used to convert the mechanical energy that generates recoil into the heat energy of the kinetic energy braking resistor 44 and dissipate it, thereby reducing the recoil and greatly improving the safety and comfort of operation, and reducing the labor intensity of the operator.

[0051] The series-wound linear motor shown in this embodiment has the characteristic of controlling the driving force by adjusting the current, and there is also a correlation between the displacement of the mover and the output thrust. Therefore, the magnitude of the thrust output by the mover 413 can be controlled by controlling the current in the stator excitation coil 32 and the mover excitation coil 31 to achieve precise control of the riveting force (i.e., force control requirements). The position information of the mover can also be accurately detected by the displacement sensor 42, thereby achieving precise control of the riveting stroke (i.e., displacement control requirements). For ease of operation, three commonly used modes can be preset for operators to select directly via the operation button 9: force control mode, displacement control mode, and position-force hybrid control mode. Operators can flexibly select the appropriate riveting mode according to different riveting workpieces and process requirements to meet diverse riveting needs.

[0052] The electromagnetic riveting gun shown in this embodiment uses a series-wound linear motor instead of the induction motor in traditional riveting guns as the main drive component. This fully utilizes the high starting thrust and transient response characteristics of the series-wound motor. Through a specific coil arrangement, the series-wound linear motor achieves a small size and high output. Furthermore, the control circuitry of the series-wound linear motor is relatively simple. The direct-drive connection structure not only efficiently converts electrical energy into power but also eliminates the need for other force transmission components. Therefore, the overall structure is simpler and can be fully integrated inside the gun body, eliminating the need for an additional drive cabinet. This improves the overall portability of the equipment and makes it easier to operate and maintain.

[0053] When performing riveting operations, make the riveting punch 2 contact the rivet, adjust the gun position according to the prompts on the human-machine interface 8, and pull the firing switch 10 to complete the operation.

[0054] Example 2:

[0055] This embodiment proposes an electromagnetic riveting gun based on a series motor. The difference between this embodiment and Embodiment 1 is that it also includes a cooling fan 5 and a power supply assembly 6. The remaining parts are the same as in Embodiment 1 and will not be described again here.

[0056] The electromagnetic riveting gun shown in this embodiment integrates a cooling fan 5 inside its gun body shell 1, forming active air cooling. The cooling fan 5 is preferably located at the rear end of the drive assembly 3. Simultaneously, several heat dissipation holes 51 communicating with the outside are provided on the inner wall of the gun body shell 1, forming passive heat dissipation. Under the action of the cooling fan 5, the cooling fan 5 and the heat dissipation holes 51 can jointly form a circulating heat dissipation system inside the gun body shell 1, resulting in better heat dissipation. For easier operation, the cooling fan 5 can be electrically connected to the ARM driver board 41. Then, according to actual needs, the ARM driver board 41 can adjust the speed and start / stop status of the cooling fan 5 through existing processing circuitry to balance heat dissipation efficiency.

[0057] The power supply assembly 6 of the electromagnetic riveting gun includes a battery module 61 and an external power cord, enabling dual-mode power supply of either battery module power or wired power. Operators can flexibly select different power supply modes according to actual needs. Battery module power supply (e.g.) Figure 4 The first power supply mode is suitable for scenarios without external power or requiring mobile operation, ensuring the portability and flexibility of the equipment. The second power supply mode is wired, suitable for fixed work sites, ensuring a stable power supply. To facilitate switching between the two power supply modes, the power supply component 6 can be electrically connected to the ARM driver board 41, allowing the ARM driver board 41 to select the power supply path via a switch in the existing processing circuit according to actual needs.

[0058] In the description of this utility model, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0059] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0060] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0061] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electromagnetic riveting gun based on a series motor, characterized in that, It includes a gun body shell (1), a riveting punch (2) that passes through the front end of the gun body shell (1), and a drive assembly (3) integrated inside the gun body shell (1); The drive assembly (3) includes a series-wound linear motor, which includes a mover and a stator coaxially sleeved outside it. The mover excitation coil (31) in the mover and the stator excitation coil (32) in the stator are connected in series. The mover is reciprocated linearly along the axial direction by the coupling of the excitation magnetic field between the two. The rear end of the riveting punch (2) is connected to the front end of the mover to convert the thrust of the mover into the impact pressure applied by the riveting punch (2) during riveting.

2. The electromagnetic riveting gun based on a series motor as described in claim 1, characterized in that, The stator includes a stator housing (33) connected inside the gun body housing (1) for winding the stator excitation coil (32), and the mover includes a mover core (34) for winding the mover excitation coil (31). The rear end of the riveting punch (2) is connected to the front end of the mover core (34) via a force transmission rod (35). The number of mover excitation coils (31) is always one less than the number of stator excitation coils (32), and both are arranged along the axial direction; Each set of mover excitation coils (31) is located in the middle of the axial direction of two adjacent sets of stator excitation coils (32) to form an I-shaped arrangement, and the mover excitation coils (31) are partially overlapped with the stator excitation coils (32) on both sides in the axial direction.

3. The electromagnetic riveting gun based on a series motor as described in claim 2, characterized in that, On the outer peripheral wall of the mover core (34), there are axially arranged mover winding slots that match the number and position of the mover excitation coils (31), and the mover excitation coils (31) are wound in the mover winding slots; Stator winding slots are provided axially on the inner peripheral wall of the stator housing (33) to match the number and position of the stator excitation coils (32), and the stator excitation coils (32) are wound in the stator winding slots; The number of mover excitation coils (31) is between 2 and 5, and the number of stator excitation coils (32) is between 3 and 6.

4. The electromagnetic riveting gun based on a series motor as described in claim 2, characterized in that, The drive assembly (3) also includes a linear guide rail (36) fixed on the inner wall of the gun body shell (1), and the rear end of the mover is connected to the linear guide rail (36) through the mover connecting seat (37); The front end of the series-wound linear motor is provided with a linear bearing (38) sleeved on the force transmission rod (35). The linear bearing (38) and the linear guide rail (36) together limit the movement of the mover.

5. An electromagnetic riveting gun based on a series motor as described in claim 4, characterized in that, An energy-absorbing spring (39) is provided between the mover connecting seat (37) and the inner wall of the gun body shell (1) to buffer the movement of the mover.

6. An electromagnetic riveting gun based on a series motor as described in claim 4, characterized in that, A first connecting plate (11) is provided at the top of the inner wall of the gun body shell (1), and a second connecting plate (12) is provided at the front end of the stator shell (33). The first connecting plate (11) and the second connecting plate (12) are arranged vertically and are fixedly connected at the intersection. The linear guide rail (36) is fixed to the inner wall of the gun body shell (1) via the first connecting plate (11), and the stator shell (33) is fixed to the inner wall of the gun body shell (1) via the second connecting plate (12); The first connecting plate (11), the second connecting plate (12), the stator housing (33), and the mover connecting seat (37) together form a frame structure for the drive assembly (3).

7. An electromagnetic riveting gun based on a series motor as described in claim 1, characterized in that, It also includes a control component (4) integrated inside the gun body shell (1); The control component (4) includes an ARM driver board (41), and a displacement sensor (42), an attitude measurement sensor and a three-dimensional force sensor (43) electrically connected to the ARM driver board (41); The displacement sensor (42) corresponds to the position of the mover and is fixedly installed on the inner wall of the gun body shell (1). The three-dimensional force sensor (43) is installed at the front end of the gun body shell (1) and is fixedly connected to the riveting punch (2).

8. An electromagnetic riveting gun based on a series motor as described in claim 7, characterized in that, The control component (4) also includes a kinetic braking resistor (44), which is electrically connected to the ARM driver board (41) and is connected in parallel to the DC bus inside the gun body shell (1).

9. An electromagnetic riveting gun based on a series motor as described in claim 1, characterized in that, It also includes a cooling fan (5), which is integrated inside the gun body shell (1) and located at the rear end of the drive assembly (3). At the same time, several heat dissipation holes (51) communicating with the outside are provided on the inner wall of the gun body shell (1). Under the action of the cooling fan (5), a circulating heat dissipation is formed inside the gun body shell (1).

10. An electromagnetic riveting gun based on a series-wound motor as described in claim 1, characterized in that, It also includes a power supply assembly (6), which supplies power to the electromagnetic riveting gun through a power interface at the bottom of the gun body shell (1); The power supply assembly (6) includes a battery module (61) and an external power cord.

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