Screw hitting tool for iron-shell direct-current brushless motor

Abstract

The utility model, which relates to the technical field of the screw driving tool, discloses a screw driving tool for an iron-casing direct-current brushless motor, the screw driving tool comprises a base, a slide bar and a casing with a hollow structure, the casing is internally provided with a clamping mechanism, the clamping mechanism comprises a worm gear horizontally and coaxially arranged in the casing, the inner side wall of the worm gear is coaxially and fixedly provided with an inner gear ring, and the outer side wall of the worm gear is coaxially and fixedly provided with an outer gear ring. A gear I is meshed with the inner side of the inner gear ring; according to the utility model, the clamping mechanism can be used for clamping motors with different sizes, the applicability is wide, the cost is reduced, in addition, different clamping modes can be flexibly selected according to different assembly directions of the motors, the universality and the practicability of the tool are improved, meanwhile, the different clamping directions are easy to display and operate, and the working efficiency is improved. When teaching is carried out, various clamping modes and operation skills can be clearly demonstrated to green hands, and the green hands can understand and simulate the clamping modes and the operation skills more easily, so that the green hands can quickly master related skills, and the teaching effect and the learning efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of screw-driving tooling technology, specifically a screw-driving tooling for iron-cased DC brushless motors. Background Technology

[0002] In the field of motor manufacturing, screw installation is a key process to ensure that the various components of the motor are tightly connected and that the motor operates normally. Screw-driving fixtures are tools and devices specially designed to assist in screw installation during motor assembly.

[0003] In the field of motor assembly, screw driving is a basic and important task. However, traditional screw driving methods often have many inconveniences. For beginners, due to a lack of experience and skills, it is difficult to accurately select the appropriate clamping method when faced with motors of different sizes and assembly positions, resulting in inaccurate screw installation or even damage to the motor. Moreover, because traditional tooling clamping methods are limited, it is difficult for instructors to clearly demonstrate various operational points and techniques when demonstrating screw driving to beginners. Beginners also find it difficult to intuitively understand and imitate, resulting in poor teaching effectiveness and difficulty for beginners to get started.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this invention is to provide a screw-driving fixture for a metal-cased DC brushless motor, in order to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides a screw-driving fixture for a steel-cased DC brushless motor, comprising a base, a slide rod, and a hollow housing. The housing is provided with a clamping mechanism, which includes a worm gear horizontally and coaxially disposed within the housing. An internal gear ring is coaxially fixed on the inner side wall of the worm gear. A gear one meshes with the inner side of the internal gear ring. The axial height of the gear one is higher than the axial height of the internal gear ring. A rack plate meshes with one side of the top of the gear one. A push rod is fixed to one end of the rack plate near the axis of the internal gear ring. A limit plate is rotatably connected to the end of the push rod away from the rack plate. A worm is meshed with one side of the worm gear, and one end of the worm penetrates the housing to the outside of the housing.

[0007] Furthermore, a vertically penetrating channel is provided at the center of the top of the housing. The end of the push rod away from the rack plate penetrates the housing into the channel. The vertical cross-section of the limiting plate along its width direction is curved and the notch faces the axis of the internal gear ring. The push rod is rotatably connected to the side wall of the limiting plate away from the axis of the internal gear ring. A fixed lug is rotatably connected to the middle of the limiting plate along its length direction. The fixed lug is fixed to the inner side wall of the channel. The worm gear is hollow along its axial direction. The internal gear ring is coaxially fixed to the inner arc wall of the worm gear. Four gears are meshed on the inner side of the internal gear ring in a circular array about the axis of the internal gear ring. The bottom end of the gear is rotatably connected to the inner wall of the bottom of the housing. The two ends of the limiting plate near the axis of the internal gear ring along the vertical direction are curved towards the axis of the internal gear ring. A crank is fixed to the end of the worm that penetrates the housing.

[0008] Furthermore, the housing has at least three vertically penetrating channels 2 along the outer edge of its vertical sidewall. The channels 2 are positioned to avoid the clamping mechanism. A vertically arranged slide rod slides within the channel 2, and the bottom of the slide rod is fixed to the base. A groove 1 is vertically formed on the sidewall of one of the slide rods away from the housing axis. A rack rod is fixed within the groove 1. A gear 2 meshes with the side of the rack rod away from the slide rod. The axial direction of the gear 2 is tangent to the circumferential direction of the housing. A fixed shaft 1 is coaxially fixed to one end of the gear 2 along its own axial direction. A locking mechanism is fixed to the end of the fixed shaft 1 away from the gear 2. A fixed shaft 2 is fixed to the end of the locking mechanism away from the fixed shaft 1. The end of the fixed shaft 2 away from the locking mechanism penetrates the housing to the outside of the housing. A crank 2 is fixed to the end of the fixed shaft 2 away from the locking mechanism.

[0009] Furthermore, the locking mechanism provided at the end of the fixed shaft fixed to the gear two includes a limiting block one coaxially fixed to the side wall of the fixed shaft two near the fixed shaft one. The limiting block two is fixed at the outer edge of the side wall of the fixed shaft one near the fixed shaft two. A coil spring is sleeved on the outside of the limiting block one. A groove two is provided on the outer wall of the limiting block one along its circumference. The length direction of the limiting block two is consistent with the axial direction of the limiting block one. The end of the limiting block two away from the fixed shaft one extends into the groove two. Both ends of the coil spring are fixed with elbows. The length direction of the elbows is parallel to the radial direction of the limiting block one and both are set towards the inside of the coil spring. The elbows at both ends of the coil spring extend into the groove two respectively. The two elbows are respectively located between the two inner side walls of the groove two along the circumference of the limiting block and the two outer side walls of the limiting block two along the circumference of the limiting block.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. The clamping mechanism enables the clamping of motors of different sizes, making it widely applicable. It eliminates the need to change tooling for different motor sizes, reducing costs. Furthermore, different clamping methods can be flexibly selected based on the motor's assembly orientation, improving the tooling's versatility and practicality. Different clamping orientations are easy to demonstrate and operate, allowing for clear demonstrations of various clamping methods and operating techniques to beginners during teaching. This makes it easier for beginners to understand and imitate, helping them quickly master the relevant skills and improving teaching effectiveness and learning efficiency.

[0012] 2. The locking mechanism design allows users to adjust the height of the tooling according to their own habits. By cranking the second crank, the second gear rotates, and the housing moves vertically along the slide rod, thereby adjusting the height of the tooling. This manual operation method is simple and easy to learn, requiring no complicated tools or professional skills, thus reducing the requirements for operators. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the clamping mechanism in a screw-driving fixture used for a metal-cased DC brushless motor.

[0014] Figure 2 A schematic diagram of the overall structure of a screw-driving fixture used for a metal-cased DC brushless motor.

[0015] Figure 3 This is a partial structural cross-sectional view of the connection between the housing and the slide rod in a screw-driving fixture used for a metal-cased brushless DC motor.

[0016] Figure 4 This is a schematic diagram showing the positional relationship between the locking mechanism, gear 2, and crank 2 in a screw-driving fixture used for a metal-cased DC brushless motor.

[0017] Figure 5 This is a schematic diagram of the locking mechanism in a screw-driving fixture used for a metal-cased DC brushless motor.

[0018] In the picture:

[0019] 10. Base; 11. Slide rod; 12. Housing; 13. Crank handle one; 14. Crank handle two;

[0020] 20. Worm gear; 21. Worm wheel; 22. Internal gear ring; 23. Gear 1; 24. Rack plate; 25. Push rod; 26. Limiting plate;

[0021] 30. Rack and pinion; 31. Gear II; 32. Limiting block I; 33. Coil spring; 34. Limiting block II. Detailed Implementation

[0022] 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.

[0023] Please see the appendix Figure 1 To be continued Figure 5 The present invention provides a screw-driving fixture for a brushless DC motor with an iron shell: including a base 10, a slide rod 11, and a hollow housing 12. The housing 12 is provided with a clamping mechanism, which includes a worm gear 21 horizontally and coaxially arranged in the housing 12. An internal gear ring 22 is coaxially fixed on the inner side wall of the worm gear 21. A gear 23 meshes with the inner side of the internal gear ring 22. The axial height of the gear 23 is higher than the axial height of the internal gear ring 22. A rack plate 24 meshes with one side of the top of the gear 23. A push rod 25 is fixed at one end of the rack plate 24 near the axis of the internal gear ring 22. A limit plate 26 is rotatably connected to the end of the push rod 25 away from the rack plate 24. A worm 20 is meshed with one side of the worm gear 21. One end of the worm 20 passes through the housing 12 and is disposed outside the housing 12.

[0024] A vertical through-passage is provided at the center of the top of the housing 12. The end of the push rod 25 away from the rack plate 24 passes through the housing 12 into the through-passage. The vertical cross section of the limiting plate 26 along its width direction is a curved arc with the notch facing the axis of the inner toothed ring 22. The push rod 25 is rotatably connected to the side wall of the limiting plate 26 away from the axis of the inner toothed ring 22. A fixed ear is rotatably connected to the middle of the limiting plate 26 along its length direction. The fixed ear is fixed to the inner side wall of the through-passage.

[0025] The worm gear 21 is hollow along its axial direction. The internal gear ring 22 is coaxially fixed on the inner arc wall of the worm gear 21. Four gears 23 are meshed on the inner side of the internal gear ring 22 in a ring array about the axial direction of the internal gear ring 22. The bottom end of the gears 23 is rotatably connected to the bottom inner wall of the housing 12. The two ends of the limiting plate 26 near the axis of the internal gear ring 22 in the vertical direction are bent toward the axis of the internal gear ring 22. The worm 20 is fixed with a crank handle 13 at one end that passes through the housing 12.

[0026] The housing 12 has at least three vertically penetrating channels 2 along the outer edge of its vertical sidewall. The channels 2 are arranged to avoid the clamping mechanism. A vertically arranged slide rod 11 slides in the channel 2. The bottom of the slide rod 11 is fixed to the base 10. A groove 1 is vertically opened on the sidewall of one of the slide rods 11 away from the axis of the housing 12. A rack rod 30 is fixed in the groove 1.

[0027] It should be noted that the limiting plate 26 includes two clamping ends, which are fixedly connected to each other at their close ends. The angle between the two clamping ends on the vertical plane is an obtuse angle, and the length of the limiting plate 26 in the vertical direction is greater than the axial length of the channel one. The two clamping ends can be respectively set through the channel one, so that the motor to be assembled can be clamped above or below the housing 12, which is convenient for the installation of screws in different positions of the motor to be assembled. At the same time, the clamping method can be changed according to teaching needs.

[0028] The length direction of the rack plate 24 is parallel to the radial direction of the internal gear ring 22. When the crank handle 13 is turned, the worm 20 is driven to rotate. The worm 20 meshes with the worm wheel 21, thereby driving the worm wheel 21 to rotate. The internal gear ring 22 on the inner side wall of the worm wheel 21 rotates accordingly. The internal gear ring 22 meshes with the gear 23, driving the gear 23 to rotate. One side of the top of the gear 23 meshes with the rack plate 24. The rack plate 24 moves linearly under the drive of the gear 23, thereby pushing the push rod 25 to move. The push rod 25 rotates and connects to the limit plate 26, thereby pushing the limit plate 26 to "converge" and clamp the motor to be assembled.

[0029] In one specific embodiment, the push rod 25 is rotatably connected to the top of the side wall of the limiting plate 26 away from the axis of the internal gear ring 22. When the rack plate 24 moves radially along the internal gear ring 22, it will pull or push the limiting plate 26. For example, when the rack plate 24 moves centripetally to push the limiting plate 26, the clamping end of the limiting plate 26 above the housing 12 will "converge" towards the axis of the internal gear ring 22, and the clamping end below the housing 12 will "spread" away from the axis of the internal gear ring 22.

[0030] Please see the appendix Figure 1 To be continued Figure 5 The present invention provides a technical solution: a second gear 31 is engaged on the side of the rack rod 30 away from the slide rod 11. The second gear 31 is tangent to the circumferential direction of the housing 12 in the axial direction. A fixed shaft is fixed to one end of the second gear 31 along its own axial direction. A locking mechanism is fixed to the end of the fixed shaft 31 away from the second gear 31. A fixed shaft is fixed to the end of the locking mechanism away from the fixed shaft 1. The end of the fixed shaft 31 away from the locking mechanism passes through the housing 12 to the outside of the housing 12. A crank handle 14 is fixed to the end of the fixed shaft 31 away from the locking mechanism.

[0031] The locking mechanism provided at the end of the fixed shaft fixed to the gear 2 31 includes a limiting block 32 coaxially fixed to the side wall of the fixed shaft 2 near the fixed shaft 1, a limiting block 34 fixed at the outer edge of the side wall of the fixed shaft 1 near the fixed shaft 2, a coil spring 33 sleeved on the outside of the limiting block 32, a groove 2 is provided on the outer wall of the limiting block 32 along its circumference, the length direction of the limiting block 2 34 is consistent with the axial direction of the limiting block 32, and the end of the limiting block 2 34 away from the fixed shaft 1 extends into the groove 2.

[0032] Both ends of the coil spring 33 are fixed with bends. The length direction of the bends is parallel to the radial direction of the limiting block 32 and both are set towards the inside of the coil spring 33. The bends at both ends of the coil spring 33 extend into the groove 2. The two bends are respectively located between the two inner sidewalls of the groove 2 along the circumference of the limiting block 32 and the two outer sidewalls of the limiting block 34 along the circumference of the limiting block 32.

[0033] It should be noted that: a rotating groove is provided inside the housing 12 at the position corresponding to the fixed shaft one and fixed shaft two, and both fixed column one and fixed column two rotate within the rotating groove.

[0034] The limiting block 32 is cylindrical in shape. The groove 2 can be regarded as a groove dug out circumferentially on its outer arc wall. The bends at both ends of the coil spring 33 extend inward and the extension direction of the bends is perpendicular to the axis of the coil spring 33. Since the sides of the bends at both ends of the coil spring 33 that are far apart from each other abut against the inner sidewalls of the two ends of the groove 2, when the limiting block 32 rotates actively, the groove 2 on the limiting block 32 will abut against the bend and thus push the coil spring 33 to move. During this period, since the groove 2 abuts from the side of the bend that is close to the coil spring 33, that is, the inner curved surface of the bend, the coil spring 33 will be in a "contracted" state when it is subjected to the force of the inner curved surface, that is, the coil spring 33 has a tendency to contract inward. As a result, the radius of the coil spring 33 will be slightly reduced, reducing the friction between the coil spring 33 and the inner arc wall of the rotating groove, thus allowing the gear 2 31 to rotate normally.

[0035] The longitudinal section of the limiting block 34 is a fan-shaped ring. The cross-sectional size of the limiting block 34 is smaller than that of the groove 2, thus providing space for the coil spring 33 to move. Since the sides of the bends at both ends of the coil spring 33 that are close to each other abut against the outer walls of the limiting block 34, when the gear 2 31 drives the limiting block 34 to rotate actively, the limiting block 34 will abut against the bend and thus push the coil spring 33 to move. During this period, since the groove 2 abuts against the outer curved surface of the bend from the side away from the coil spring 33, the coil spring 33 will be in a "stretched" state when subjected to the force of the outer curved surface, that is, the coil spring 33 has a tendency to expand outward. As a result, the radius of the coil spring 33 will increase slightly, thereby increasing the contact area and contact force with the inner arc wall of the rotating groove, increasing the friction, and making it difficult or even impossible for the gear 2 31 to rotate, thus achieving a self-locking effect.

[0036] Working principle:

[0037] Turning the crank handle 13 drives the worm gear 20 to rotate. The worm gear 20 meshes with the worm wheel 21, driving the worm wheel 21 to rotate. The internal gear ring 22 rotates accordingly and meshes with the gear 1 23, causing the gear 1 23 to rotate. The gear 1 23 pushes the rack plate 24 to move linearly. The rack plate 24 pushes the push rod 25. The push rod 25 rotates and connects to the limiting plate 26, realizing the "convergence" or "dispersion" of the limiting plate 26 to clamp the motor to be assembled. Turning the crank handle 24 drives the fixed shaft 2 to rotate. The fixed shaft 2 causes the gear 2 31 to rotate. The gear 2 31 meshes with the rack rod 30, realizing the tooling to slide up and down along the slide rod 11 to adjust its height. During this period, the locking mechanism ensures that the housing 12 will not slip.

Claims

1. A screw-driving fixture for a brushless DC motor with an iron casing, comprising a base (10), a slide rod (11), and a hollow housing (12), characterized in that: The housing (12) is provided with a clamping mechanism, which includes a worm gear (21) horizontally and coaxially arranged in the housing (12). An internal gear ring (22) is coaxially fixed on the inner side wall of the worm gear (21). A gear (23) meshes with the inner side of the internal gear ring (22). The axial height of the gear (23) is higher than the axial height of the internal gear ring (22). A rack plate (24) meshes with one side of the top of the gear (23). A push rod (25) is fixed at one end of the rack plate (24) near the axis of the internal gear ring (22). A limit plate (26) is rotatably connected to the end of the push rod (25) away from the rack plate (24). A worm (20) is meshed with one side of the worm gear (21). One end of the worm (20) passes through the housing (12) and is arranged outside the housing (12).

2. The screw-driving fixture for a metal-cased brushless DC motor as described in claim 1, characterized in that: The top center of the housing (12) has a vertical through-channel. The end of the push rod (25) away from the rack plate (24) passes through the housing (12) into the channel. The vertical section of the limiting plate (26) along its width direction is curved and the notch is set towards the axis of the inner toothed ring (22). The push rod (25) is rotatably connected to the side wall of the limiting plate (26) away from the axis of the inner toothed ring (22). The middle part of the limiting plate (26) along its length direction is rotatably connected to a fixed ear seat, which is fixed to the inner side wall of the channel.

3. The screw-driving fixture for a metal-cased brushless DC motor as described in claim 1, characterized in that: The worm gear (21) is hollow along its axial direction. The internal gear ring (22) is coaxially fixed on the inner arc wall of the worm gear (21). Four gears (23) are meshed on the inner side of the internal gear ring (22) in a ring array about the axial direction of the internal gear ring (22). The bottom end of the gears (23) is rotatably connected to the bottom inner wall of the housing (12). The two ends of the limiting plate (26) near the axis of the internal gear ring (22) in the vertical direction are bent toward the axis of the internal gear ring (22). The worm (20) is fixed with a crank handle (13) at one end that passes through the housing (12).

4. The screw-driving fixture for a metal-cased brushless DC motor as described in claim 1, characterized in that: The housing (12) has at least three vertically penetrating channels 2 along the outer edge of the side wall in the vertical direction. The channels 2 are arranged to avoid the clamping mechanism. A vertically arranged slide rod (11) slides in the channel 2. The bottom of the slide rod (11) is fixed on the base (10). One of the slide rods (11) has a vertically arranged groove 1 on the side wall away from the axis of the housing (12). A rack rod (30) is fixed in the groove 1.

5. The screw-driving fixture for a metal-cased brushless DC motor as described in claim 4, characterized in that: The rack rod (30) is engaged with a gear two (31) on the side away from the slide rod (11). The gear two (31) is axially tangent to the circumferential direction of the housing (12). One end of the gear two (31) is coaxially fixed with a fixed shaft one. The end of the fixed shaft one away from the gear two (31) is fixed with a locking mechanism. The end of the locking mechanism away from the fixed shaft one is fixed with a fixed shaft two. The end of the fixed shaft two away from the locking mechanism passes through the housing (12) to the outside of the housing (12). The end of the fixed shaft two away from the locking mechanism is fixed with a crank two (14).

6. The screw-driving fixture for a metal-cased brushless DC motor as described in claim 5, characterized in that: The locking mechanism provided at the end of the fixed shaft fixed to the gear 2 (31) includes a limiting block 1 (32) coaxially fixed to the side wall of the fixed shaft 2 near the fixed shaft 1, the limiting block 2 (34) is fixed at the outer edge of the side wall of the fixed shaft 1 near the fixed shaft 2, and a coil spring (33) is sleeved on the outside of the limiting block 1 (32).

7. The screw-driving fixture for a metal-cased brushless DC motor as described in claim 6, characterized in that: The outer wall of the limiting block 1 (32) is provided with a groove 2 along its circumference. The length direction of the limiting block 2 (34) is consistent with the axial direction of the limiting block 1 (32). The end of the limiting block 2 (34) away from the fixed shaft 1 extends into the groove 2.

8. The screw-driving fixture for a metal-cased brushless DC motor as described in claim 6, characterized in that: Both ends of the coil spring (33) are fixed with bends. The length direction of the bends is parallel to the radial direction of the limiting block one (32) and both are set towards the inside of the coil spring (33). The bends at both ends of the coil spring (33) extend into the groove two. The two bends are respectively located between the two inner sidewalls of the groove two along the circumference of the limiting block one (32) and the two outer sidewalls of the limiting block two (34) along the circumference of the limiting block one (32).

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