Servo spin riveting motorized spindle

Abstract

The servo spin riveting motorized spindle comprises a shell, and a front cavity and a rear cavity are formed in the shell; the lead screw motor is mounted in the rear cavity; the main shaft sleeve is arranged in the front cavity, a servo motor and a spin riveting assembly are arranged in the main shaft sleeve, the servo motor is connected with the input end of the rear side of the spin riveting assembly through a connecting shaft, and the front end of the spin riveting assembly extends out of the main shaft sleeve; the screw rod motor drives the main shaft sleeve to move back and forth in the shell so as to drive the spin riveting assembly to move back and forth; and the servo motor drives the spin riveting assembly to do spin riveting action. The lead screw motor and the servo motor are integrally installed in the shell and located in the same axial direction, output is stable, the structure is compact, frequent replacement of quick-wear parts is avoided, the application scene is wider, the device can be used on equipment such as robots and truss manipulators, and the fixing modes are flexible and diversified; the service life of the riveting structure is prolonged, the production efficiency is improved, the processing cost is reduced, the operation is convenient, and the comprehensive performance is improved.

Description

Technical Field

[0001] This invention relates to the field of riveting technology, and more specifically to a servo-driven riveting electric spindle. Background Technology

[0002] Riveting, as a special joining technology, currently mainly includes pneumatic riveting and hydraulic riveting. However, with the continuous development of market demand, servo riveting has emerged. But the current structure has significant limitations, severely restricting its application. The main disadvantages of existing servo riveting are: During the riveting process, the force output by the servo motor and the point where the workpiece receives the riveting force are not on the same center, which means that the servo motor needs to be selected with a large power and the lead screw of the transmission component needs to be increased in size; see prior patents CN222725395U an improved riveting machine and CN222710736U a riveting mechanism.

[0003] Traditional servo riveting structures cannot be installed on promising robots and space-constrained equipment because the force is not concentrated at the center point, resulting in frequent replacement of vulnerable parts, high production downtime and maintenance costs, and affecting riveting quality. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a servo riveting electric spindle that solves the technical problems of large size, easy damage and high maintenance cost of previous servo riveting structures.

[0005] The technical solution adopted by this invention to solve its technical problem is: Provides a servo riveting electric spindle, including An outer casing, wherein a front cavity and a rear cavity are formed within the outer casing; A lead screw motor, which is installed in the rear cavity; A main spindle sleeve is disposed in the front cavity. A servo motor and a riveting assembly are disposed in the main spindle sleeve. The servo motor is connected to the rear input end of the riveting assembly via a connecting shaft. The front end of the riveting assembly extends out from the main spindle sleeve. The lead screw motor drives the spindle sleeve to move back and forth inside the housing, thereby driving the riveting assembly to move back and forth; the servo motor drives the riveting assembly to perform riveting action.

[0006] Furthermore, the spindle sleeve includes T-shaped sleeve, wherein the riveting assembly and the connecting shaft are located inside the T-shaped sleeve; A circular sleeve, the front end of which is connected to the rear end of a T-shaped sleeve, and the servo motor is disposed inside the circular sleeve; A cylinder cover is located at the rear end of the circular sleeve, and the cylinder cover is connected to the lead screw motor.

[0007] Furthermore, a pressure sensor is installed between the lead screw motor and the main shaft sleeve.

[0008] Furthermore, the housing includes Large-diameter cylinder, small-diameter cylinder, and inner guide cylinder; The main shaft sleeve is located inside the small-diameter cylinder, the lead screw motor is located inside the large-diameter cylinder, and the inner guide cylinder is located at the front end of the small-diameter cylinder.

[0009] Furthermore, an outer sleeve is provided on the outside of the small-diameter cylinder.

[0010] Furthermore, the riveting assembly includes an eccentric bushing, an eccentric gear shaft, a gear ring, a semi-circular copper sleeve, a collet sleeve, a rivet head, and a safety cover. The gear ring and the semi-circular copper sleeve are fixed inside the main shaft sleeve, the safety cover is fixed at the front end of the main shaft sleeve, and the semi-circular copper sleeve is located on the outside. The rear end of the eccentric bushing is fixedly connected to the connecting shaft so that the connecting shaft drives the eccentric bushing to rotate. The rear end of the eccentric gear shaft is inserted into the eccentric hole of the eccentric bushing, and its gear part is located inside the gear ring. Its front end is inserted into the chuck sleeve. The front end of the chuck sleeve is connected to a rivet head, which passes through the safety cover. A spring is provided between the safety cover and the chuck sleeve, so that the spherical surface of the rear end of the chuck sleeve abuts against the spherical surface of the semi-circular copper sleeve.

[0011] The beneficial effects of this invention are: The servo riveting electric spindle of this invention integrates the lead screw motor and the servo motor into a single housing. The two motors are aligned on the same axis, resulting in stable output, a compact structure, and no frequent replacement of easily damaged parts. This allows for a wider range of applications, including robots, gantry manipulators, and other equipment with strict space requirements. The fixing methods are flexible and diverse. It also improves the service life of the riveting structure, increases production efficiency, reduces processing costs, is easy to operate, and enhances overall performance. Attached Figure Description

[0012] The invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the servo riveting electric spindle of the present invention; Figure 2 This is a schematic diagram of the lead screw motor inside the housing; Figure 3 This is a structural diagram of the lead screw motor and the main shaft sleeve; Figure 4 This is a cross-sectional view of the spindle sleeve; Among them, 1. outer shell, 11. large diameter cylinder, 12. small diameter cylinder, 13. inner guide cylinder; 2. Main shaft sleeve; 21. T-shaped sleeve; 22. Round sleeve; 23. Sleeve cover; 3, spin rivet assembly, 31, eccentric shaft sleeve, 32, eccentric gear shaft, 33, gear ring, 34, half-round copper sleeve, 35, chuck sleeve, 36, rivet head, 37, safety cover; 4, lead screw motor, 5, servo motor, 6, outer sleeve, 7, connecting shaft. DETAILED DESCRIPTION

[0014] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined object of the application, the specific embodiments, structures, features and effects according to the present application will be described in detail below in combination with the drawings and preferred embodiments.

[0015] The present application provides a kind of servo spin riveting electric spindle, the following are described in detail respectively.It needs to be explained that the description order of the following embodiment is not as the preferred order of the embodiment of the present application is limited.And in the following embodiment, the description of each embodiment has its own emphasis, the part that is not described in detail in a certain embodiment, can refer to the relevant description of other embodiments.

[0016] To solve the technical problems of large volume, easy to damage and high maintenance cost of the servo spin riveting structure in the prior art, an embodiment of the present application provides a kind of servo spin riveting electric spindle. Details are described below.

[0017] As shown in Figures 1 to 4 A kind of servo spin riveting electric spindle, comprising housing 1, the front cavity and rear cavity are opened in the housing 1; lead screw motor 4, which is installed in the rear cavity; spindle sleeve 2, which is arranged in the front cavity, servo motor 5 and spin rivet assembly 3 are arranged in the spindle sleeve 2, the servo motor 5 is connected with the rear side input end of spin rivet assembly 3 through connecting shaft 7, and the front end of spin rivet assembly 3 extends from spindle sleeve 2; The lead screw motor 4 drives the spindle sleeve 2 to move forward and backward in the housing 1, thereby driving the spin rivet assembly 3 to move forward and backward;The servo motor 5 drives the spin rivet assembly 3 to make spin riveting action.

[0018] Specifically, as an optional embodiment in the present embodiment, as shown in Figure 3 The spindle sleeve 2 comprises T-shaped sleeve 21, the spin rivet assembly 3 and the connecting shaft 7 are located in the T-shaped sleeve 21; round sleeve 22, the front end of which is bolted with the rear end of the T-shaped sleeve 21, and the servo motor 5 is arranged in the round sleeve 22; sleeve cover 23, which is arranged at the rear end of the round sleeve 22, and the sleeve cover 23 is connected with the lead screw motor 4.

[0019] Specifically, the front end of the servo motor 5 is bolted with the rear end of the T-shaped sleeve 21.

[0020] The cap 23 and the sleeve 22 are fastened together by multiple bolts.

[0021] During operation, when the lead screw motor 4 drives the main shaft sleeve 2 to move back and forth, the entire cylindrical sleeve 22 slides against the inner wall of the front cavity, making the movement of the entire main shaft sleeve 2 more stable.

[0022] In this embodiment, the lead screw motor 4 is a hole-type lead screw motor 4.

[0023] Specifically, as an optional implementation in this embodiment, a pressure sensor (not shown in the figure) is provided between the lead screw motor 4 and the main shaft sleeve 2.

[0024] The pressure sensor can detect the force applied by the riveting assembly 3 during riveting, ensuring the quality of the riveting.

[0025] Specifically, as an optional implementation method in this embodiment, such as Figure 2 As shown, the outer shell 1 includes a large-diameter cylindrical body 11, a small-diameter cylindrical body 12, and an inner guide cylinder 13; The main shaft sleeve 2 is located inside the small-diameter cylinder 12, the lead screw motor 4 is located inside the large-diameter cylinder 11, and the inner guide cylinder 13 is located at the front end inside the small-diameter cylinder 12.

[0026] Specifically, the small-diameter cylinder 12 has a T-shaped structure, and the large-diameter cylinder 11 and the small-diameter cylinder 12 are fastened together by bolts. The screw motor 4 is fixed to the rear end of the small-diameter cylinder 12 by bolts.

[0027] Specifically, as an optional implementation method in this embodiment, such as Figure 1 As shown, an outer sleeve 6 is provided on the outside of the small-diameter cylindrical body 12.

[0028] The outer sleeve 6 is mainly used to mount the electric spindle onto the robotic arm, preventing the robotic arm from directly contacting the outer casing 1.

[0029] Specifically, as an optional implementation method in this embodiment, such as Figure 4 As shown, the riveting assembly 3 includes an eccentric bushing 31, an eccentric gear shaft 32, a gear ring 33, a semi-circular copper sleeve 34, a chuck sleeve 35, a rivet head 36, and a safety cover 37. The gear ring 33 and the semi-circular copper sleeve 34 are fixed inside the main shaft sleeve 2, the safety cover 37 is fixed at the front end of the main shaft sleeve 2, and the semi-circular copper sleeve 34 is located on the outer side. The rear end of the eccentric bushing 31 is fixedly connected to the connecting shaft 7 so that the connecting shaft 7 drives the eccentric bushing 31 to rotate. The rear end of the eccentric gear shaft 32 is inserted into the eccentric hole of the eccentric bushing 31, and its gear part is located in the gear ring 33. Its front end is inserted into the chuck sleeve 35. A universal bearing is provided between the eccentric gear shaft 32 and the chuck sleeve 35. The front end of the chuck sleeve 35 is connected to the rivet head 36. The rivet head 36 passes through the safety cover 37. A spring is provided between the safety cover 37 and the chuck sleeve 35, so that the spherical surface of the rear end of the chuck sleeve 35 abuts against the spherical surface of the semi-circular copper sleeve 34.

[0030] Working principle of riveting assembly 3: Servo motor 5 drives connecting shaft 7 to rotate, and connecting shaft 7 synchronously drives eccentric bushing 31 to rotate. Eccentric bushing 31 drives eccentric gear shaft 32 to rotate eccentrically, thereby driving the gear part on eccentric gear shaft 32 to revolve in gear ring 33. At the same time, the gear part cooperates with gear ring 33 to realize the rotation of eccentric gear shaft 32. Eccentric gear shaft 32 and chuck sleeve 35 are connected by universal bearing, thereby driving eccentric gear shaft 32 to drive chuck sleeve 35 and riveting head 36 to rotate. Since chuck sleeve 35 and semi-circular copper sleeve 34 are spherically connected, they rotate around the center origin of semi-circular copper sleeve 34, and cooperate to drive riveting head 36 to rotate in a plum blossom trajectory.

[0031] Working process of the servo riveting electric spindle of this invention: The lead screw motor 4 drives the riveting assembly 3 to move back and forth via the main shaft sleeve 2, while the servo motor 5 drives the riveting head 36 of the riveting assembly 3 to perform the riveting action. The lead screw motor 4 and the servo motor 5 are located in the same housing 1 and are aligned on the same axis, resulting in stable output, a compact structure, and no frequent replacement of easily damaged parts. This broadens the application scenarios, allowing for use on equipment such as robots and gantry manipulators, and providing flexible and diverse fixing methods. It also improves the service life of the riveting structure, increases production efficiency, reduces processing costs, facilitates operation, and enhances overall performance.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A servo riveting electric spindle, characterized in that, include The outer shell (1) has a front cavity and a rear cavity inside; A lead screw motor (4) is installed in the rear cavity; A main shaft sleeve (2) is set in the front cavity. A servo motor (5) and a riveting assembly (3) are set in the main shaft sleeve (2). The servo motor (5) is connected to the rear input end of the riveting assembly (3) via a connecting shaft (7). The front end of the riveting assembly (3) extends out from the main shaft sleeve (2). The lead screw motor (4) drives the main shaft sleeve (2) to move back and forth inside the outer shell (1), thereby driving the riveting assembly (3) to move back and forth; the servo motor (5) drives the riveting assembly (3) to perform riveting action.

2. The servo riveting electric spindle according to claim 1, characterized in that, The main shaft sleeve (2) includes T-shaped sleeve (21), the riveting assembly (3) and the connecting shaft (7) are located inside the T-shaped sleeve (21); A circular sleeve (22) has its front end connected to the rear end of a T-shaped sleeve (21), and the servo motor (5) is installed inside the circular sleeve (22); A cylinder cover (23) is located at the rear end of the cylindrical sleeve (22), and the cylinder cover (23) is connected to the lead screw motor (4).

3. The servo riveting electric spindle according to claim 1, characterized in that, A pressure sensor is installed between the lead screw motor (4) and the main shaft sleeve (2).

4. The servo riveting electric spindle according to claim 1, characterized in that, The outer casing (1) includes Large-diameter cylinder (11), small-diameter cylinder (12), and inner guide cylinder (13); The main shaft sleeve (2) is located inside the small diameter cylinder (12), the lead screw motor (4) is located inside the large diameter cylinder (11), and the inner guide cylinder (13) is located at the front end inside the small diameter cylinder (12).

5. The servo riveting electric spindle according to claim 1, characterized in that, The small-diameter cylinder (12) is provided with an outer sleeve (6).

6. The servo riveting electric spindle according to claim 1, characterized in that, The riveting assembly (3) includes an eccentric bushing (31), an eccentric gear shaft (32), a gear ring (33), a semi-circular copper sleeve (34), a chuck sleeve (35), a rivet head (36), and a safety cover (37). The gear ring (33) and the semi-circular copper sleeve (34) are fixed inside the main shaft sleeve (2), the safety cover (37) is fixed at the front end of the main shaft sleeve (2), and the semi-circular copper sleeve (34) is located on the outside. The rear end of the eccentric bushing (31) is fixedly connected to the connecting shaft (7) so that the connecting shaft (7) drives the eccentric bushing (31) to rotate. The rear end of the eccentric gear shaft (32) is inserted into the eccentric hole of the eccentric bushing (31), and its gear part is located in the gear ring (33). Its front end is inserted into the chuck sleeve (35). The front end of the chuck sleeve (35) is connected to the rivet head (36). The rivet head (36) passes through the safety cover (37). A spring is provided between the safety cover (37) and the chuck sleeve (35) so that the spherical surface of the rear end of the chuck sleeve (35) abuts against the spherical surface of the semi-circular copper sleeve (34).

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