Motor shaft knurling mechanism

Abstract

This utility model discloses a knurling mechanism for a motor shaft, including a machine tool. A slide carriage is slidably connected to a slide rail inside the machine tool, and a three-jaw chuck is installed on the left wall of the machine tool. The knurling mechanism includes a support frame, an annular seat, threaded cylinders, studs, a synchronous seat, knurling wheels, and a drive assembly. The annular seat is mounted on the upper side of the slide carriage via two support frames. Three evenly distributed threaded cylinders are rotatably connected inside the annular seat via bearings. This motor shaft knurling mechanism employs a three-set knurling wheel design to accelerate the knurling speed of the motor shaft. Simultaneously, the three sets of knurling wheels are distributed in an equilateral triangle around the outer side of the motor shaft. The three sets of knurling wheels move the same distance through a transmission element, allowing the knurling pressure applied to the motor shaft by each knurling wheel to cancel each other out, preventing axial wobbling of the motor shaft due to knurling compression, and effectively improving the rotational stability of the motor shaft during the knurling process.

Description

Technical Field

[0001] This utility model relates to the field of motor shaft processing technology, specifically to a motor shaft knurling mechanism. Background Technology

[0002] The motor shaft refers to the central axis of the motor rotor, which connects the motor rotor to the motor load. Extending from the central axis of the motor rotor, the motor shaft can be made of materials such as steel and aluminum alloy. The quality and material of the motor shaft directly affect the performance and lifespan of the motor. The motor shaft undergoes a knurling process, which makes it easier to position and fix during assembly, ensuring more precise fit between components. (Existing technology: Authorization Publication No. CN210413329) U's patent discloses a knurling device for machining motor shafts, comprising a base, a fixing mechanism, and a moving mechanism. An adjusting mechanism is located inside the left side of the base, comprising a slide rail, a slider, and a return spring. A buffer mechanism is installed on the right side of the adjusting mechanism, comprising a shock-absorbing spring, a limiting plate, and a support plate. The fixing mechanism is symmetrically mounted above the adjusting mechanism and the base, comprising a base, fixing bolts, and bearings. The moving mechanism is mounted above a support, comprising a lead screw, a second motor, and ball bearings. An air pump is fixed to the lower surface of the ball bearings, and the lower part of the air pump is connected to a cylinder. A piston rod is installed inside the cylinder, and a knurling wheel is installed at the lower end of the piston rod. The knurling device for motor shaft processing can perform knurling operations on motor shafts of different lengths and facilitates the replacement of knurling wheels, making it convenient to perform knurling at different positions on the motor shaft. However, the device uses a single knurling wheel, which limits the knurling efficiency. At the same time, the motor shaft is subjected to knurling pressure from the single knurling wheel during the knurling process, which may cause the shaft center to wobble during the rotation of the motor shaft due to the unidirectional pressure. The buffering effect of the buffering mechanism is limited. Therefore, we propose a motor shaft knurling mechanism. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a motor shaft knurling mechanism. This device adopts a three-set knurling wheel design to accelerate the knurling speed of the motor shaft. At the same time, the three sets of knurling wheels are distributed in an equilateral triangle around the outer side of the motor shaft. The three sets of knurling wheels move the same distance through the transmission element, so that the knurling pressure applied by each knurling wheel to the motor shaft can cancel each other out, avoiding axial shaking of the motor shaft due to knurling extrusion, effectively improving the rotational stability of the motor shaft during the knurling process, and effectively solving the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a motor shaft knurling mechanism, including a machine tool, a slide rail slidably connected to the slide rail inside the machine tool, a three-jaw chuck installed on the left wall of the machine tool, and also including a knurling mechanism;

[0005] Knurling mechanism: It includes a support frame, an annular seat, threaded cylinders, studs, a synchronizing seat, knurling wheels, and a drive assembly. The annular seat is mounted on the upper side of the slide via two support frames. Inside the annular seat, three evenly distributed threaded cylinders are rotatably connected via bearing one. Each threaded cylinder is threaded with a stud. The end of each stud near the center of the annular seat is rotatably connected to a synchronizing seat via bearing two. Inside each synchronizing seat, a knurling wheel is rotatably connected via a sealed bearing. A drive assembly is located between the threaded cylinders and the annular seat. This device uses a three-set knurling wheel design to accelerate the knurling speed of the motor shaft. At the same time, the three sets of knurling wheels are distributed in an equilateral triangle around the outer side of the motor shaft. The three sets of knurling wheels move the same distance through the transmission element, so that the knurling pressure applied by each knurling wheel to the motor shaft can cancel each other out, avoiding axial wobbling of the motor shaft due to knurling compression, and effectively improving the rotational stability of the motor shaft during the knurling process.

[0006] Furthermore, a microcontroller is provided on the front side of the machine tool, and the input terminal of the microcontroller is electrically connected to an external power supply, which facilitates the control of the electrical components inside the device.

[0007] Furthermore, the drive assembly includes a first bevel gear, a bevel ring, a second bevel gear, and a brake motor. The first bevel gear is respectively disposed on the outer side of the threaded cylinder. The inner wall of the annular seat is rotatably connected to the bevel ring through a large-diameter bearing. The outer side of the annular seat is provided with a brake motor. The input end of the brake motor is electrically connected to the output end of the microcontroller. The output shaft of the brake motor passes through the wall of the annular seat and is provided with a second bevel gear. Both the second bevel gear and the first bevel gear are meshed with the bevel ring, so that the three sets of knurling wheels in the motor shaft knurling mechanism move synchronously.

[0008] Furthermore, the knurling mechanism also includes fixed seats and guide rods. The guide rods are respectively located on the side of the synchronous seat away from the center of the annular seat. Three evenly distributed fixed seats are provided on the right side of the annular seat. The guide rods are slidably connected to the circular holes opened on the adjacent fixed seats to prevent the synchronous seat from rotating during the movement of the motor shaft knurling mechanism.

[0009] Furthermore, the outer side of the annular seat is provided with three evenly distributed protective covers, which are installed in conjunction with studs. The inside of the annular seat is provided with an annular protective shell, and bevel gear one, bevel gear ring and bevel gear two are all located inside the annular protective shell. The studs all pass through the through holes opened in the wall of the annular protective shell to protect the transmission components of the knurled part in the motor shaft knurling mechanism from dust.

[0010] Furthermore, the machine tool is internally connected to a lead screw via a bearing, which is threaded to the slide. A servo motor is located on the right side of the machine tool. The input end of the servo motor is electrically connected to the output end of the microcontroller. The output shaft of the servo motor is fixedly connected to the right end of the lead screw, which adjusts the position of the knurled part in the knurling mechanism of the motor shaft.

[0011] Furthermore, a first corrugated tube is provided between the synchronous seat and the annular protective shell. The first corrugated tube is movably sleeved on the outer end of the adjacent stud. A second corrugated tube is provided between the left and right walls of the machine tool and the slide. The second corrugated tube is movably sleeved on the outer end of the lead screw, thus providing dust protection for the exposed parts of the stud and lead screw in the knurling mechanism of the motor shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This motor shaft knurling mechanism has the following advantages:

[0013] 1. During the knurling operation of the motor shaft, the device adopts a three-set knurling wheel design to accelerate the knurling speed of the motor shaft. At the same time, the three sets of knurling wheels are distributed in an equilateral triangle around the outer side of the motor shaft. The three sets of knurling wheels move synchronously through a threaded cylinder, stud, synchronous seat and drive assembly, so that the knurling pressure applied by each knurling wheel to the motor shaft can cancel each other out, avoiding axial shaking of the motor shaft due to knurling extrusion, and effectively improving the rotational stability of the motor shaft during the knurling process.

[0014] 2. A knurling device is used on the motor shaft. The transmission components inside the device are wrapped and protected by a protective cover, annular protective shell, bellows one and bellows two to prevent dust and other impurities from interfering with the transmission of the components. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the protective cover structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the annular protective shell structure of this utility model;

[0019] Figure 5 This is an enlarged structural diagram of point A in this utility model.

[0020] In the diagram: 1 Machine tool, 2 Microcontroller, 3 Three-jaw chuck, 4 Slide rail, 5 Carriage, 6 Knurling mechanism, 61 Support frame, 62 Ring seat, 63 Threaded cylinder, 64 Stud, 65 Synchronous seat, 66 Knurled wheel, 67 Drive assembly, 671 Bevel gear one, 672 Bevel gear ring, 673 Bevel gear two, 674 Brake motor, 68 Fixed seat, 69 Guide rod, 7 Protective cover, 8 Ring protective shell, 9 Bellows one, 10 Lead screw, 11 Servo motor, 12 Bellows two. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This embodiment provides a technical solution: a motor shaft knurling mechanism, including a machine tool 1, a slide rail 4 inside the machine tool 1 is slidably connected to a slide carriage 5, a three-jaw chuck 3 is installed on the left wall of the machine tool 1, a microcontroller 2 is provided on the front side of the machine tool 1, and the input end of the microcontroller 2 is electrically connected to an external power supply. When the device is used to perform knurling on the motor shaft, the motor shaft is first fixed by the three-jaw chuck 3 (the three-jaw chuck 3 realizes the synchronous radial movement of the three jaws through the internal gear transmission and planar thread mechanism, thereby automatically centering and clamping the workpiece. Its core structure includes a chuck body, a bevel gear set and a jaw drive mechanism with a planar thread), and also includes a knurling mechanism 6;

[0023] Knurling mechanism 6: It includes a support frame 61, an annular seat 62, threaded cylinders 63, studs 64, a synchronizing seat 65, a knurling wheel 66, and a drive assembly 67. The annular seat 62 is mounted on the upper side of the slide 5 via two support frames 61. Inside the annular seat 62, three evenly distributed threaded cylinders 63 are rotatably connected via bearing one. Each threaded cylinder 63 is threaded with a stud 64. The end of each stud 64 near the center of the annular seat 62 is rotatably connected to a synchronizing seat 65 via bearing two. Inside each synchronizing seat 65, a knurling wheel 66 is rotatably connected via a sealed bearing. A drive assembly 67 is provided between the threaded cylinders 63 and the annular seat 62. The drive assembly 67 includes a bevel gear one 671, a bevel gear ring 672, a bevel gear two 673, and a brake motor 674. Gear 671 is respectively disposed on the outer side of the threaded cylinder 63. A bevel gear ring 672 is rotatably connected to the inner wall of the annular seat 62 via a large-diameter bearing. A brake motor 674 is disposed on the outer side of the annular seat 62. The input end of the brake motor 674 is electrically connected to the output end of the microcontroller 2. The output shaft of the brake motor 674 passes through the wall of the annular seat 62 and is provided with a bevel gear 673. Both the bevel gear 673 and bevel gear 671 mesh with the bevel gear ring 672. The knurling mechanism 6 also includes a fixed seat 68 and guide rods 69. The guide rods 69 are respectively disposed on the side of the synchronous seat 65 away from the center of the annular seat 62. Three evenly distributed fixed seats 68 are disposed on the right side of the annular seat 62. The guide rods 69 are slidably connected to the circular holes opened on the adjacent fixed seats 68. Three evenly distributed protective covers 7 are provided on the outer side of the seat 62. The protective covers 7 are installed in conjunction with the studs 64. An annular protective shell 8 is provided inside the annular seat 62. The first bevel gear 671, the bevel gear ring 672, and the second bevel gear 673 are all located inside the annular protective shell 8. The studs 64 all pass through the through holes opened in the wall of the annular protective shell 8. The machine tool 1 is rotatably connected to the lead screw 10 through the bearing 3. The lead screw 10 is threadedly connected to the slide 5. A servo motor 11 is provided on the right side of the machine tool 1. The input end of the servo motor 11 is electrically connected to the output end of the microcontroller 2. The output shaft of the servo motor 11 is fixedly connected to the right end of the lead screw 10. A bellows 9 is provided between the synchronous seat 65 and the annular protective shell 8. The bellows 9 are movably sleeved on the outer ends of the adjacent studs 64. The machine tool 1 Bellows 12 are provided on both the left and right walls and between the slide 5. Bellows 12 are movably sleeved on the outer end of the lead screw 10. The brake motor 674 is started by the microcontroller 2, causing its output shaft to drive the bevel gear 673 to rotate. (When the brake motor 674 is energized, the armature inside the brake motor 674 is electromagnetically attracted, making the brake disc rotatable and allowing the brake motor 674 to rotate freely. When the brake motor 674 is de-energized, the electromagnet is de-energized, and the armature is immediately pressed by the spring, causing the brake disc to press against the rear end cover of the motor, stopping the rotation. Therefore, the output shaft of the brake motor 674 has a self-locking function.) The bevel gear 673 is connected to the bevel gear ring 672, and the bevel gear ring 672 is connected to the bevel gear 671, thereby causing the threaded cylinder 63 to rotate.During the rotation of the threaded cylinder 63, the threaded connection with the stud 64 drives the corresponding synchronizing seat 65 to move synchronously towards the axis of the annular seat 62 (the annular center of the annular seat 62 coincides with the chuck center of the three-jaw chuck 3). The synchronizing seat 65 drives the knurling wheels 66 to move synchronously (during this process, the synchronizing seat 65 drives the corresponding guide rod 69 to slide adaptively along the circular hole on the corresponding fixed seat 68). Through the three knurling wheels 66, the motor shaft is knurled and extruded synchronously. Since the three knurling wheels 66 move the same distance, the knurling pressure applied to the motor shaft is the same, ensuring that the motor shaft is subjected to uniform pressure during the knurling process and preventing damage due to uneven knurling. The axial wobble phenomenon affects the knurling effect. To address this, the device employs three knurling wheels 66 working in tandem to accelerate the knurling speed on the motor shaft. Bevel gear 1 671, bevel gear ring 672, and bevel gear 2 673 are all located within the annular housing 8. The ends of studs 64 furthest from the center of the annular seat 62 are located within corresponding protective covers 7. The middle portion of studs 64 is located within the annular housing 8, and the end of studs 64 closest to the center of the annular seat 62 is located within corresponding bellows 9. Through the cooperation of the protective covers 7, the annular housing 8, and the bellows 9, the knurling effect on bevel gear 1 671, bevel gear ring 672, bevel gear 2 673, studs 64, and other components within the device is achieved. The knurling tube 63 is wrapped to prevent external dust and other impurities from interfering with its transmission. A drive motor is installed inside the left side wall of the machine tool 1. The output shaft of the drive motor is fixed to the three-jaw chuck 3. The rotation of the output shaft of the drive motor causes the three-jaw chuck 3 to drive the fixed motor shaft to rotate, thereby realizing the knurling operation. The microcontroller 2 starts the servo motor 11, causing its output shaft to drive the lead screw 10 to rotate. During the rotation of the lead screw 10, the slide 5 moves along the slide rail 4 through the threaded connection, thereby adjusting the position of the knurling point of the knurling mechanism 6 of the device. The exposed parts of the lead screw 10 are wrapped by the corrugated tube 12 to prevent external dust from interfering with its transmission. Dust and other impurities can enter and interfere with its transmission. A bellows is a corrugated structure made of multiple layers of stacked metal sheets. Its working principle is to achieve self-adaptive sealing through elastic deformation to maintain good sealing performance. This device uses a three-set knurling wheel design 66 to accelerate the knurling speed of the motor shaft. Simultaneously, the three sets of knurling wheels 66 are distributed in an equilateral triangle around the outer side of the motor shaft. The three sets of knurling wheels 66 move the same distance through the transmission element, allowing the knurling pressure applied to the motor shaft by each knurling wheel 66 to cancel each other out, preventing axial wobble of the motor shaft due to knurling compression, and effectively improving the rotational stability of the motor shaft during the knurling process.

[0024] The working principle of the motor shaft knurling mechanism provided by this utility model is as follows: When using the device to knurl the motor shaft, the motor shaft is first fixed by a three-jaw chuck 3 (the three-jaw chuck 3 achieves synchronous radial movement of the three jaws through internal gear transmission and a planar thread mechanism, thereby automatically centering and clamping the workpiece; its core structure includes a chuck body, a bevel gear set, and a jaw drive mechanism with a planar thread). Then, the microcontroller 2 starts the brake motor 674, causing its output shaft to drive the bevel gear 673 to rotate (after the brake motor 674 is energized, the armature inside the brake motor 674 is electromagnetically attracted, making the brake disc rotatable and allowing the brake motor 674 to rotate freely; when the brake motor 674 is de-energized, the electromagnet is de-energized, and the armature is immediately pushed by the spring). The brake disc is pressed against the rear end cover of the motor, stopping rotation. Therefore, the output shaft of the brake motor 674 has a self-locking function. The second bevel gear 673 meshes with the bevel gear ring 672, and the bevel gear ring 672 meshes with the first bevel gear 671, causing the threaded cylinder 63 to rotate. During the rotation of the threaded cylinder 63, through the threaded connection between it and the stud 64, it drives the corresponding synchronous seat 65 to move synchronously towards the axis of the ring seat 62 (the ring center of the ring seat 62 coincides with the chuck center of the three-jaw chuck 3). The synchronous seat 65 drives the knurling wheels 66 to move synchronously (during this process, the synchronous seat 65 drives the corresponding guide rod 69 to slide adaptively along the circular hole on the corresponding fixed seat 68). Through the three knurling wheels 66, the motor shaft is knurled synchronously. In the extrusion operation, the three knurling wheels 66 travel the same distance, thus applying the same knurling pressure to the motor shaft. This ensures uniform pressure on the motor shaft during rotational knurling, preventing axial wobble from affecting the knurling effect. Simultaneously, the device uses three knurling wheels 66 working in coordination to accelerate the knurling speed on the motor shaft. Bevel gear 671, bevel ring 672, and bevel gear 673 are all located within the annular housing 8. The ends of studs 64 furthest from the center of the annular seat 62 are all located within the corresponding protective covers 7, the middle portions of studs 64 are all located within the annular housing 8, and the ends of studs 64 closest to the center of the annular seat 62 are all located within the corresponding bellows 9. Through the cooperation of the protective covers 7, the annular housing 8, and the bellows 9, the knurling pressure on bevel gear 671 within the device is increased. The bevel ring 672, bevel gear 673, stud 64, and threaded cylinder 63 are wrapped to prevent external dust and other impurities from interfering with their transmission. A drive motor is installed inside the left side wall of the machine tool 1. The output shaft of the drive motor is fixed to the three-jaw chuck 3. The rotation of the output shaft of the drive motor causes the three-jaw chuck 3 to drive the fixed motor shaft to rotate, thereby realizing the knurling operation. The microcontroller 2 starts the servo motor 11, causing its output shaft to drive the lead screw 10 to rotate. During the rotation of the lead screw 10, the slide 5 moves along the slide rail 4 through the threaded connection, thereby adjusting the position of the knurling point of the knurling mechanism 6 of the device. The exposed parts of the lead screw 10 are wrapped by the bellows 12 to prevent external dust and other impurities from entering and interfering with its transmission.A bellows is a corrugated structure made of multiple layers of laminated metal sheets. Its working principle involves achieving self-adaptive sealing through elastic deformation to maintain good sealing performance.

[0025] It is worth noting that the microcontroller 2 disclosed in the above embodiments can be MCS-51, the brake motor 674 can be YEJ6324, and the servo motor 11 can be DT-D02. The microcontroller 2 controls the brake motor 674 and the servo motor 11 using methods commonly used in the prior art.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A motor shaft knurling mechanism, comprising a machine tool (1), a sliding rail (4) inside the machine tool (1), a sliding frame (5) slidingly connected to the sliding rail (4), and a three-jaw chuck (3) installed on the left wall of the machine tool (1), characterized in that: It also includes a knurling mechanism (6); Knurling mechanism (6): It includes a support frame (61), an annular seat (62), threaded cylinder (63), stud (64), synchronizing seat (65), knurling wheel (66) and drive assembly (67). The annular seat (62) is set on the upper side of the slide (5) through two support frames (61). The interior of the annular seat (62) is rotatably connected to three evenly distributed threaded cylinders (63) through a bearing. The interior of each threaded cylinder (63) is threadedly connected to a stud (64). The end of each stud (64) near the center of the annular seat (62) is rotatably connected to a synchronizing seat (65) through a bearing. The interior of each synchronizing seat (65) is rotatably connected to a knurling wheel (66) through a sealed bearing. A drive assembly (67) is provided between the threaded cylinder (63) and the annular seat (62).

2. An electric machine shaft knurling mechanism according to claim 1, characterized in that: The machine tool (1) is equipped with a microcontroller (2) on the front side, and the input terminal of the microcontroller (2) is electrically connected to an external power supply.

3. An electric machine shaft knurling mechanism according to claim 2, characterized in that: The drive assembly (67) includes a first bevel gear (671), a bevel ring (672), a second bevel gear (673), and a brake motor (674). The first bevel gear (671) is respectively disposed on the outer side of the threaded cylinder (63). The inner wall of the annular seat (62) is rotatably connected to the bevel ring (672) through a large-diameter bearing. The outer side of the annular seat (62) is provided with a brake motor (674). The input end of the brake motor (674) is electrically connected to the output end of the microcontroller (2). The output shaft of the brake motor (674) passes through the wall of the annular seat (62) and is provided with a second bevel gear (673). Both the second bevel gear (673) and the first bevel gear (671) are meshed with the bevel ring (672).

4. The motor shaft knurling mechanism of claim 1, wherein: The knurling mechanism (6) also includes a fixed seat (68) and a guide rod (69). The guide rod (69) is respectively located on the side of the synchronous seat (65) away from the center of the annular seat (62). Three evenly distributed fixed seats (68) are provided on the right side of the annular seat (62). The guide rod (69) is slidably connected to the circular holes opened on the adjacent fixed seats (68).

5. The motor shaft knurling mechanism of claim 3, wherein: The outer side of the annular seat (62) is provided with three evenly distributed protective covers (7), which are installed in conjunction with studs (64). The annular seat (62) is provided with an annular protective shell (8). The first bevel gear (671), the bevel gear ring (672) and the second bevel gear (673) are all located inside the annular protective shell (8). The studs (64) all pass through the through holes opened in the wall of the annular protective shell (8).

6. An electric machine shaft knurling mechanism according to claim 5, characterized in that: The machine tool (1) is internally connected to a lead screw (10) via a bearing. The lead screw (10) is threadedly connected to the slide (5). A servo motor (11) is provided on the right side of the machine tool (1). The input end of the servo motor (11) is electrically connected to the output end of the microcontroller (2). The output shaft of the servo motor (11) is fixedly connected to the right end of the lead screw (10).

7. An electric machine shaft knurling mechanism according to claim 6, characterized in that: A corrugated pipe (9) is provided between the synchronous seat (65) and the annular protective shell (8). The corrugated pipe (9) is movably sleeved on the outer end of the adjacent stud (64). A corrugated pipe (12) is provided between the left and right walls of the machine tool (1) and the slide (5). The corrugated pipe (12) is movably sleeved on the outer end of the lead screw (10).

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