Screw driving mechanism
By designing a screw-pulling mechanism including a servo reducer motor and multi-axis moving assembly, the problem of the gap between the rear end cover and the case in the assembly of the servo motor is solved, and higher assembly accuracy and stability are achieved.
Patent Information
- Application Number
- CN202421029635.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-13
AI Technical Summary
During the assembly process of servo motor, the gap between the rear end cover and the case causes the single-sided force to affect the assembly accuracy when fixing the screws, affecting the assembly quality of the servo motor.
A screw-making mechanism including a workbench, positioning assembly, moving assembly and screw assembly is designed. The servo reducer motor, rotating arm, drive cylinder, X-axis, Y-axis, Z-axis motor and pinch nozzle are used to accurately control the Move the X-axis, Y-axis and Z-axis directions to ensure the position and force of the screws.
It improves the assembly accuracy of the servo motor, ensures a stable connection between the rear end cover and the case, and enhances the accuracy of the assembly process.
Smart Images
Figure CN222327280U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of servo motor processing, in particular to a screw driving mechanism. Background Art
[0002] When the servo motor is produced, after the rotor is installed into the casing, the rear end cover needs to be fixed to the casing with screws. The work of fixing the screws is completed by an automatic screw machine, but the front end of the rotor is supported by a wave spring sheet, so that the rear end cover has a certain gap with the upper end surface of the casing in a free state. In this case, when the first screw is tightened, the rear end cover is subjected to unilateral force, which will affect the assembly accuracy of the servo motor. Therefore, the above problem needs to be solved. Utility Model Content
[0003] The utility model aims to provide a screw driving mechanism to overcome the above-mentioned defects in the prior art.
[0004] A screw-driving mechanism, comprising a workbench, a clamping nozzle and a material bin, wherein the clamping nozzle is connected to the material bin through an air pipe, and further comprising a positioning assembly, a moving assembly and a screw-driving assembly, wherein a positioning seat for placing a casing is provided on the workbench;
[0005] The positioning assembly is arranged on the workbench and is used to position the casing and the rotor and the rear end cover thereon;
[0006] The screw-tightening assembly is arranged on the moving assembly on the workbench, and moves in the X-axis, Y-axis and Z-axis directions under the drive of the moving assembly to drive the screws conveyed into the clamping nozzle into the casing and the rear end cover.
[0007] Preferably, the positioning assembly includes a rotating shaft, a servo reduction motor, a rotating arm and a driving cylinder. The rotating shaft is rotatably connected to the workbench, the servo reduction motor is installed on the motor seat at the bottom of the workbench and its output shaft is connected to the rotating shaft, the rotating arm is mounted on the rotating shaft through the linear bearing sleeve thereon, the driving cylinder is installed at the bottom of the mounting plate on the rotating shaft and the lower end of its piston rod is connected to the rotating arm, and a pressure head is provided at the bottom of the rotating arm.
[0008] Preferably, the moving assembly includes an X-axis moving frame, an X-axis motor, a Y-axis moving frame, a Y-axis motor, a Z-axis moving frame and a Z-axis motor, the two sides of the Y-axis moving frame are respectively slidably connected to the slide rail 1 on the workbench, the Y-axis motor is installed on the workbench and its output shaft is provided with a Y-axis screw that is spirally connected to the Y-axis moving frame through a screw nut, the two sides of the X-axis moving frame are respectively slidably connected to the slide rail 2 on the Y-axis moving frame, the X-axis motor is installed on the Y-axis moving frame and its output shaft is provided with an X-axis screw that is spirally connected to the X-axis moving frame through a screw nut, the two sides of the Z-axis moving frame are respectively slidably connected to the slide rail 3 on the X-axis moving frame, the Z-axis motor is installed on the X-axis moving frame and its output shaft is provided with a Z-axis screw that is spirally connected to the Z-axis moving frame through a screw nut.
[0009] Preferably, the screw tightening assembly includes an electric screwdriver servo motor, a lifting cylinder and a lifting plate, the lifting plate is slidably connected to a slide rail four on the Z-axis moving frame, the lifting cylinder is installed on the Z-axis moving frame and its piston rod is connected to the lifting plate, the electric screwdriver servo motor is installed on the lifting plate and a cutter head is installed on its output shaft, and the nozzle is installed on the fixed plate on the lower side of the Z-axis moving frame and is located directly below the cutter head.
[0010] Preferably, the linear bearing is connected to the rotating arm via a connecting seat.
[0011] The utility model has the following advantages:
[0012] When the utility model is in use, the servo reduction motor on the positioning component drives the rotating arm and the pressing head to press the rear end cover onto the casing, and then the moving component controls the screw tightening component to move in the X-axis, Y-axis and Z-axis directions, and the screw tightening component screws the screws delivered to the clamping nozzle into the screw holes to fix the rear end cover to the casing, thereby improving the assembly accuracy of the servo motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model.
[0014] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.
[0015] Figure 3 This is a schematic diagram of the structure of the servo motor to be processed according to the utility model.
[0016] Among them: 1. Workbench; 11. Positioning seat; 2. Positioning assembly; 21. Rotating shaft; 22. Servo reduction motor; 23. Motor seat; 24. Rotating arm; 25. Linear bearing; 251. Connecting seat; 26. Driving cylinder; 27. Mounting plate; 28. Press head; 3. Moving assembly; 31. Y-axis moving frame; 32. Y-axis motor; 33. Y-axis screw rod; 34. X-axis moving frame; 35. X-axis motor; 36. X-axis screw rod; 37. Z-axis moving frame; 38. Z-axis motor; 39. Z-axis screw rod; 4. Screw tightening assembly; 41. Lifting plate; 42. Lifting cylinder; 43. Electric screwdriver servo motor; 44. Cutter head; 45. Fixed plate; 5. Clamping nozzle; 6. Material bin; 7. Casing; 71. Wave spring sheet; 72. Rotor; 73. Rear end cover. DETAILED DESCRIPTION
[0017] The specific implementation methods of the utility model are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the utility model.
[0018] like Figure 1-3 As shown, the utility model provides a screw-driving mechanism, including a workbench 1, a nozzle 5, a silo 6, a positioning assembly 2, a moving assembly 3 and a screw-driving assembly 4, the nozzle 5 is connected to the silo 6 through an air pipe, a positioning seat 11 for placing a housing 7 is provided on the workbench 1, the positioning assembly 2 is arranged on the workbench 1 and is used to position the housing 7 and the rotor 72 and the rear end cover 73 thereon, the screw-driving assembly 4 is arranged on the moving assembly 3 on the workbench 1, and moves in the X-axis, Y-axis and Z-axis directions under the drive of the moving assembly 3 to drive the screws conveyed to the nozzle 5 into the housing 7 and the rear end cover 73.
[0019] It should be noted that the positioning assembly 2 includes a rotating shaft 21, a servo reduction motor 22, a rotating arm 24 and a driving cylinder 26. The rotating shaft 21 is rotatably connected to the workbench 1. The servo reduction motor 22 is installed on the motor seat 23 at the bottom of the workbench 1 and its output shaft is connected to the rotating shaft 21. The rotating arm 24 is sleeved on the rotating shaft 21 through the linear bearing 25 thereon. The linear bearing 25 is connected to the rotating arm 24 through a connecting seat 251. The driving cylinder 26 is installed at the bottom of the mounting plate 27 on the rotating shaft 21 and the lower end of its piston rod is connected to the rotating arm 24. A pressure head 28 is provided at the bottom of the rotating arm 24.
[0020] In addition, the moving assembly 3 includes an X-axis moving frame 34, an X-axis motor 35, a Y-axis moving frame 31, a Y-axis motor 32, a Z-axis moving frame 37 and a Z-axis motor 38. The two sides of the Y-axis moving frame 31 are respectively slidably connected to the slide rail 1 on the workbench 1. The Y-axis motor 32 is installed on the workbench 1 and a Y-axis screw 33 is provided on its output shaft and is spirally connected to the Y-axis moving frame 31 through a screw nut. The two sides of the X-axis moving frame 34 are respectively slidably connected to the slide rail 2 on the Y-axis moving frame 31. The X-axis motor 35 is installed on the Y-axis moving frame 31 and its output shaft is provided with an X-axis screw 36 which is spirally connected to the X-axis moving frame 34 through a screw nut. The two sides of the Z-axis moving frame 37 are respectively slidably connected to the slide rails three on the X-axis moving frame 34. The Z-axis motor 38 is installed on the X-axis moving frame 34 and its output shaft is provided with a Z-axis screw 39 which is spirally connected to the Z-axis moving frame 37 through a screw nut, driving the screw tightening assembly 4 to move in the X-axis, Y-axis and Z-axis directions, so that the screw tightening assembly 4 can move to the corresponding screw hole position.
[0021] In addition, the screw tightening assembly 4 includes an electric screwdriver servo motor 43, a lifting cylinder 42 and a lifting plate 41. The lifting plate 41 is slidably connected to the slide rail four on the Z-axis moving frame 37. The lifting cylinder 42 is installed on the Z-axis moving frame 37 and its piston rod is connected to the lifting plate 41. The electric screwdriver servo motor 43 is installed on the lifting plate 41 and a cutter head 44 is installed on its output shaft. The nozzle 5 is installed on the fixed plate 45 on the lower side of the Z-axis moving frame 37 and is located directly below the cutter head 44. The screws are transported to the nozzle 5 through the air pipe on the silo 6.
[0022] In actual application, the housing 7 is manually placed in the positioning groove of the positioning seat 11, and the rotor 72 is placed in the housing 7. Due to the elastic effect of the wave spring sheet 71, the rotor 72 is slightly lifted, and the servo reduction motor 22 drives the rotating arm 24 and the pressure head 28 thereon to rotate to above the rear end cover 73, and then controls the piston rod of the driving cylinder 26 to extend. Under the guidance of the linear bearing 25, the piston rod drives the rotating arm 24 and the pressure head 28 thereon to move downward, and the pressure head 28 located at the end of the rotating arm 24 presses the rear end cover 73 tightly, and then controls the X-axis motor 35 and the X-axis screw rod 36, the Y-axis motor 32 and the Y-axis screw rod 33, and the Z-axis motor 38 and the Z-axis screw rod. 39 drives the screw tightening assembly 4 to move in the X-axis, Y-axis and Z-axis directions, so that the cutter head 44 moves to the top of one of the screw holes, and the screw is sent through the hopper 6. The screw is sent to the clamping nozzle 5 at the end of the electric screwdriver kit through the air pipe, and then the electric screwdriver servo motor 43 is driven downward under the control of the piston rod of the lifting cylinder 42, and the screw is driven into the screw hole through the cutter head 44 on the output shaft of the electric screwdriver servo motor 43. After the screws that can be driven are driven, the servo reduction motor 22 drives the arm 24 to rotate to make way for the blocked screw holes, and the screw tightening assembly 4 continues to screw. When the screwing is completed, the X-axis moving frame 34, the Y-axis moving frame 31 and the Z-axis moving frame 37 are controlled to reset, and the work is completed.
[0023] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.
Claims
1. A screw driving mechanism, comprising a workbench (1), a clamping nozzle (5) and a material bin (6), wherein the clamping nozzle (5) is connected to the material bin (6) via an air pipe, and characterized in that: It also includes a positioning assembly (2), a moving assembly (3) and a screw-tightening assembly (4); the workbench (1) is provided with a positioning seat (11) for placing the housing (7); The positioning assembly (2) is arranged on the workbench (1) and is used to position the housing (7) and the rotor (72) and the rear end cover (73) thereon; The screw-tightening assembly (4) is arranged on the moving assembly (3) on the workbench (1), and is driven by the moving assembly (3) to move in the X-axis, Y-axis and Z-axis directions to drive the screws conveyed to the clamping nozzle (5) into the housing (7) and the rear end cover (73).
2. A screw driving mechanism according to claim 1, characterized in that: The positioning assembly (2) comprises a rotating shaft (21), a servo reduction motor (22), a rotating arm (24) and a driving cylinder (26); the rotating shaft (21) is rotatably connected to the workbench (1); the servo reduction motor (22) is mounted on a motor seat (23) at the bottom of the workbench (1) and its output shaft is connected to the rotating shaft (21); the rotating arm (24) is sleeved on the rotating shaft (21) through a linear bearing (25) thereon; the driving cylinder (26) is mounted on the bottom of a mounting plate (27) on the rotating shaft (21) and the lower end of its piston rod is connected to the rotating arm (24); a pressure head (28) is provided at the bottom of the rotating arm (24).
3. A screw driving mechanism according to claim 1, characterized in that: The moving assembly (3) comprises an X-axis moving frame (34), an X-axis motor (35), a Y-axis moving frame (31), a Y-axis motor (32), a Z-axis moving frame (37) and a Z-axis motor (38); both sides of the Y-axis moving frame (31) are respectively slidably connected to a slide rail on the workbench (1); the Y-axis motor (32) is mounted on the workbench (1) and a Y-axis screw rod (33) is provided on its output shaft and is screw-connected to the Y-axis moving frame (31) via a screw rod nut; both sides of the X-axis moving frame (34) are respectively slidably connected to a slide rail on the workbench (1); The X-axis motor (35) is mounted on the Y-axis moving frame (31), and an X-axis screw rod (36) is provided on its output shaft and is screw-connected to the X-axis moving frame (34) through a screw nut. Both sides of the Z-axis moving frame (37) are respectively slidably connected to the slide rails 3 on the X-axis moving frame (34). The Z-axis motor (38) is mounted on the X-axis moving frame (34), and a Z-axis screw rod (39) is provided on its output shaft and is screw-connected to the Z-axis moving frame (37) through a screw nut.
4. A screw driving mechanism according to claim 3, characterized in that: The screw tightening assembly (4) comprises an electric screwdriver servo motor (43), a lifting cylinder (42) and a lifting plate (41); the lifting plate (41) is slidably connected to a slide rail four on a Z-axis moving frame (37); the lifting cylinder (42) is mounted on the Z-axis moving frame (37) and its piston rod is connected to the lifting plate (41); the electric screwdriver servo motor (43) is mounted on the lifting plate (41) and a cutter head (44) is mounted on its output shaft; the nozzle (5) is mounted on a fixed plate (45) on the lower side of the Z-axis moving frame (37) and is located directly below the cutter head (44).
5. A screw driving mechanism according to claim 2, characterized in that: The linear bearing (25) is connected to the rotating arm (24) via a connecting seat (251).