A linear motion output motor and implementation method thereof

Abstract

The present invention discloses a linear motion output motor, including a housing, an end cover connected to the bottom of the housing, a lower bracket provided above the end cover, an iron core connected above the lower bracket, a skeleton provided inside the iron core, a magnet provided above the iron core, a counterweight provided above the magnet, an output shaft provided above the counterweight, spring assemblies connected to both sides of the counterweight, the other end of the spring assembly connected to the lower bracket, the spring assembly including a plurality of superimposed springs, and a plurality of through slots provided at equal intervals on the springs; the present invention also discloses a method for realizing a linear motion output motor. The spring assembly of the present invention can ensure that in the case of a large motion stroke, the motion components in directions other than the output motion direction are almost zero, ensuring that the air gap between the magnet and the iron core changes little during the operation of the motor, and at the same time ensuring that the motion gap in the non-motion direction does not change to cause noise and collision problems.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and in particular relates to a linear motion output motor and an implementation method thereof. Background Art

[0002] In recent years, as motor applications in consumer electronics continue to expand, such as in electric shavers, electric toothbrushes, and facial cleansers, motor technology solutions have gradually evolved to meet increasing consumer demand, enhancing the user experience in each application area. Based on the type of motion output, motors can be categorized as rotary, oscillating, and linear, respectively, outputting full-circle rotation, reciprocating rotation within a certain angle, and linear motion.

[0003] When linear motion is required on the product side, rotary and linear motion output motors are available. The former requires the addition of a new guide structure to project the rotary motion in a certain direction to achieve linear motion. This results in complex application scenarios, multiple structures, and high costs. Furthermore, clearances between the structures can lead to louder noise and greater noise risks. Linear motion output motors, because the actuator motion is inherently linear, can easily output linear motion and are gradually finding their way into high-end applications across various fields.

[0004] However, the linear motion output motor in the prior art is subjected to large stress on the spring during operation, resulting in a short service life of the motor. In addition, due to size limitations, the motor has a short motion stroke. Summary of the Invention

[0005] The present invention aims to provide a linear motion output motor to solve the problems mentioned in the background art. The linear motion output motor provided by the present invention has the characteristics of stable and fast motion, long life and long travel.

[0006] Another object of the present invention is to provide a method for realizing a linear motion output motor.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a linear motion output motor, comprising a casing, an end cover connected to the bottom of the casing, a lower bracket provided above the end cover, an iron core connected above the lower bracket, a skeleton provided inside the iron core, a coil wound on the skeleton, a magnet provided above the iron core, a counterweight provided above the magnet, an output shaft provided above the counterweight, the upper end of the output shaft passes through the casing, spring assemblies are connected on both sides of the counterweight, the other end of the spring assembly is connected to the lower bracket, the spring assembly comprises a plurality of superimposed spring sheets, and a plurality of through slots are provided on the spring sheets at equal intervals.

[0008] In order to effectively avoid mutual interference between the shrapnel, and at the same time, collide with the casing during mechanical impact, protect important components such as the spring assembly, and prevent product failure, gaskets are further provided at the upper and lower ends of the shrapnel away from the iron core.

[0009] In order to facilitate the winding of the wire ends in and out of the coil, further, conductive sheets are respectively provided on both sides of one end of the skeleton close to the end cover, and the conductive sheets are provided with wire winding ends.

[0010] In order to accommodate the frame and facilitate the installation of the frame, two accommodating grooves corresponding to the frame are further provided inside the iron core.

[0011] In order to provide space for the movement of the spring assembly and improve the compactness of the structure and the space utilization, further, an end of the iron core away from the end cover and on both sides of the movement direction are respectively provided with inclined surfaces.

[0012] In order to provide an escape space for the movement of the output shaft, an escape hole is further provided at the upper end of the casing.

[0013] In order to facilitate the rapid positioning of the lower bracket and the housing, further, a positioning groove is provided at the bottom of the housing, and a positioning block corresponding to the positioning groove is provided on the lower bracket.

[0014] In order to provide a welding surface for the spring assembly and to provide positioning for the installation of the iron core, the lower bracket is further provided with upward folded edges on two sides other than the positioning block.

[0015] In order to ensure that the internal structure of the motor does not affect the position or angle of the pins and provide better scalability for motor applications, the lower bracket is further provided with a through slot corresponding to the conductive sheet, and the end cover is provided with a contact slot corresponding to the through slot, and the end cover is provided with pins, and the contact ends of the pins and the conductive sheet are located in the contact slots.

[0016] Furthermore, in the present invention, the method for realizing a linear motion output motor comprises the following steps:

[0017] (1) The housing and the end cover form a closed cavity;

[0018] (2) The magnet provides the driving magnetic field for the motor;

[0019] (3) When the coil is energized, the electric field and magnetic field interact to drive the output shaft to swing;

[0020] (4) The spring assembly connects the counterweight and the lower bracket to provide elastic force for the swing of the output shaft, so that the output shaft swings left and right.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention comprises two spring plates stacked together to form a spring assembly, and a plurality of through slots are provided on the spring plates at equal intervals. The arrangement of the slots allows a single spring plate to be evenly divided into multiple independent moving parts in stress states when deformed in the spring assembly, thereby greatly reducing the stress on the spring assembly and extending the service life of the spring assembly.

[0023] 2. The spring clip of the present invention is provided with gaskets at both ends of the side away from the iron core. The gasket between the two spring clips can effectively prevent mutual interference between the spring clips. At the same time, the gasket located on the outermost side can collide with the casing during mechanical impact, protecting important components such as the spring assembly and preventing product failure.

[0024] 3. The spring assembly of the present invention can ensure that the motion components in directions other than the output motion direction are almost zero even in the case of a large motion stroke. This ensures that the air gap between the magnet and the core changes little during motor operation, ensuring stable performance. At the same time, it ensures that the motion gap in the non-moving direction does not change, causing noise and collision problems.

[0025] 4. The end cap of the present invention is embedded with pins. The position of the pin lead-out end can be adjusted by changing the pin structure, so that the internal structure of the motor does not affect the position or angle of the pin, providing better scalability for motor applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the explosion of the structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 3 It is a schematic cross-sectional structural diagram of the present invention in the direction of motion;

[0029] Figure 4 It is a schematic cross-sectional view of the present invention in the vertical motion direction;

[0030] Figure 5 It is a structural schematic diagram of the spring assembly of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the shrapnel of the present invention;

[0032] Figure 7 Schematic diagram of the structure of the skeleton of the present invention;

[0033] Figure 8 Schematic diagram of the structure of the iron core of the present invention;

[0034] Figure 9 It is a schematic diagram of the casing structure of the present invention;

[0035] Figure 10It is a structural schematic diagram of the lower bracket of the present invention;

[0036] Figure 11 It is a structural schematic diagram of the end cover of the present invention;

[0037] Figure 12 Schematic diagram of the magnetic circuit of the magnetic steel of the present invention;

[0038] In the figure: 1. output shaft; 2. housing; 21. avoidance hole; 22. positioning slot; 3. counterweight; 4. spring assembly; 41. spring piece; 42. gasket; 43. through slot; 5. iron core; 51. receiving slot; 52. inclined surface; 6. lower bracket; 61. folded edge; 62. through slot; 63. positioning block; 7. end cover; 71. embedded block; 72. contact slot; 8. skeleton; 81. conductive sheet; 82. wire winding end; 9. magnet; 10. coil; 11. pin. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] Example 1

[0041] See also Figure 1-12 The present invention provides the following technical solutions: a linear motion output motor, comprising a casing 2, an end cover 7 bonded to the bottom of the casing 2 by glue, a lower bracket 6 provided above the end cover 7, the lower bracket 6 is welded and fixed to the casing 2, an iron core 5 is welded above the lower bracket 6, a skeleton 8 is bonded to the inside of the iron core 5 by glue, a coil 10 is wound on the skeleton 8, a magnetic steel 9 is provided above the iron core 5, a counterweight 3 is bonded to the top of the magnetic steel 9 by glue, an output shaft 1 is connected above the counterweight 3 by welding, gluing, threaded engagement or riveting, and this embodiment is preferably welded, the upper end of the output shaft 1 passes through the casing 2, spring assemblies 4 are welded on both sides of the counterweight 3, the other end of the spring assembly 4 is welded to the lower bracket 6, the spring assembly 4 comprises two superimposed spring pieces 41, and a plurality of through slots 43 are provided on the spring piece 41 at equal intervals.

[0042] By adopting the above technical solution, two spring pieces 41 are stacked together to form a spring assembly 4, and a number of through grooves 43 are provided on the spring piece 41 at equal intervals. The arrangement of the barrel grooves 43 allows a single spring piece 41 to be evenly divided into multiple independent moving parts in stress states when deformed in the spring assembly 4, thereby greatly reducing the stress on the spring assembly 4 and extending the service life of the spring assembly 4.

[0043] Specifically, gaskets 42 are provided at the upper and lower ends of the spring piece 41 away from the iron core 5 .

[0044] By adopting the above technical solution, the gasket 42 between the two spring pieces 41 can effectively avoid mutual interference between the spring pieces 41. At the same time, the gasket 42 located on the outermost side can collide with the housing 2 during mechanical impact, protecting important components such as the spring assembly 4 and preventing product failure.

[0045] Specifically, conductive sheets 81 are respectively provided on both sides of one end of the skeleton 8 close to the end cover 7 , and the conductive sheets 81 are provided with wire winding ends 82 .

[0046] By adopting the above technical solution, the arrangement of the wire winding end 82 facilitates the winding of the wire in and out of the coil 10. In order to ensure the stability of the electrical performance after winding, tin immersion treatment can be performed after winding.

[0047] Specifically, two receiving slots 51 corresponding to the frame 8 are provided inside the iron core 5 .

[0048] By adopting the above technical solution, the skeleton 8 is accommodated, which facilitates the installation of the skeleton 8.

[0049] Specifically, an escape hole 21 is provided at the upper end of the housing 2 .

[0050] By adopting the above technical solution, an avoidance space is provided for the movement of the output shaft 1.

[0051] Specifically, a positioning groove 22 is provided on the bottom of the housing 2 , and a positioning block 63 corresponding to the positioning groove 22 is provided on the lower bracket 6 .

[0052] By adopting the above technical solution, the lower bracket 6 and the housing 2 can be quickly positioned.

[0053] Specifically, the end cover 7 is provided with embedded blocks 71 on two sides other than the contact groove 72 .

[0054] By adopting the above technical solution, quick positioning is provided for the assembly of the end cover 7 and the housing 2.

[0055] Example 2

[0056] The difference between this embodiment and the first embodiment is that, specifically, an end of the iron core 5 away from the end cover 7 and on both sides of the moving direction are respectively provided with inclined surfaces 52 .

[0057] By adopting the above technical solution, space is provided for the movement of the spring assembly 4, thereby improving the structural compactness and space utilization.

[0058] Example 3

[0059] The difference between this embodiment and the first embodiment is that: specifically, the lower bracket 6 is provided with upward folding edges 61 on the two sides where the positioning blocks 63 are located.

[0060] By adopting the above technical solution, a welding surface is provided for the spring assembly 4 and positioning can be provided for the installation of the iron core 5.

[0061] Example 4

[0062] The difference between this embodiment and embodiment 1 is that: specifically, a through groove 62 corresponding to the conductive sheet 81 is provided on the lower bracket 6, and a contact groove 72 corresponding to the through groove 62 is provided on the end cover 7, and a pin 11 is embedded on the end cover 7, and the contact end of the pin 11 and the conductive sheet 81 is located in the contact groove 72, and the contact end of the pin 11 and the conductive sheet 81 is connected by soldering.

[0063] By adopting the above technical solution, the position of the lead end of pin 11 can be adjusted by changing the structure of pin 11, so that the internal structure of the motor does not affect the position or angle of the pin, providing better scalability for motor applications.

[0064] Example 5

[0065] The difference between this embodiment and embodiment 1 is that: specifically, the end cover 7 and the frame 8 are both made of insulating materials, and in this embodiment, engineering plastics are preferably used.

[0066] By adopting the above technical solution, when the pin 11 is energized, there will be no leakage in the coil 10 and the conductive sheet 81, ensuring that the product has reliable insulation resistance in addition to the effective circuit.

[0067] Example 6

[0068] The difference between this embodiment and embodiment 1 is that: specifically, the magnetic steel 9 is magnetized with both N pole and S pole.

[0069] By adopting the above technical solution, the trend of the motion displacement and frequency relationship curve can be adjusted by adjusting the magnetization gap, thereby achieving adjustment of the output response.

[0070] Furthermore, the method for realizing a linear motion output motor according to the present invention comprises the following steps:

[0071] (1) The housing 2 and the end cover 7 form a closed cavity;

[0072] (2) The magnet 9 provides a driving magnetic field for the motor;

[0073] (3) When the coil 10 is energized, the electric field and magnetic field interact to drive the output shaft 1 to swing;

[0074] (IV) The spring assembly 4 connects the counterweight 3 and the lower bracket 6, providing elastic force for the swing of the output shaft 1, so that the output shaft 1 swings left and right.

[0075] In summary, the present invention comprises two spring pieces 41 stacked together to form a spring assembly 4, and a plurality of through slots 43 are provided on the spring piece 41 at equal intervals. The arrangement of the barrel slots 43 allows a single spring piece 41 to be evenly divided into a plurality of independent moving parts in stress states when deformed in the spring assembly 4, thereby greatly reducing the stress on the spring assembly 4 and extending the service life of the spring assembly 4. The spring piece 41 of the present invention is provided with gaskets 42 at both ends of the upper and lower ends away from the iron core 5. The gasket 42 between the two spring pieces 41 can effectively avoid mutual interference between the spring pieces 41. At the same time, the gasket 42 located on the outermost side can be released from the housing 2 during mechanical impact. Collision can be prevented, and important components such as the spring assembly 4 can be protected to prevent product failure. The spring assembly 4 of the present invention can ensure that in the case of a large motion stroke, the motion components in directions other than the output motion direction are almost zero, thereby ensuring that the air gap between the magnet 9 and the iron core 5 changes little during the operation of the motor, and the performance is stable. At the same time, it ensures that the motion gap in the non-motion direction does not change, causing noise and collision problems. The end cover 7 of the present invention is embedded with a pin 11, and the position of the lead end of the pin 11 can be adjusted by changing the structure of the pin 11, so that the internal structure of the motor does not affect the position or angle of the pin, providing better scalability for motor applications.

[0076] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A linear motion output motor, comprising a housing, characterized in that: An end cover is connected to the bottom of the casing, a lower bracket is provided above the end cover, an iron core is connected above the lower bracket, a frame is provided inside the iron core, a coil is wound on the frame, a magnet is provided above the iron core, a counterweight is provided above the magnet, an output shaft is provided above the counterweight, the upper end of the output shaft passes through the casing, both sides of the counterweight are connected to one end of the spring assembly, the other end of the spring assembly is connected to the lower bracket, the spring assembly includes a number of superimposed spring sheets, and a number of through grooves are provided on the spring sheets at equal intervals.

2. The linear motion output motor according to claim 1, characterized in that: Gaskets are arranged at the upper and lower ends of the spring sheet away from the iron core.

3. The linear motion output motor according to claim 1, characterized in that: Conductive sheets are respectively arranged on both sides of one end of the frame close to the end cover, and wire winding ends are arranged on the conductive sheets.

4. The linear motion output motor according to claim 1, characterized in that: The iron core is provided with two accommodating grooves corresponding to the frame.

5. The linear motion output motor according to claim 1, characterized in that: The iron core has inclined surfaces on both sides of one end away from the end cover and located in the moving direction.

6. The linear motion output motor according to claim 1, characterized in that: The upper end of the casing is provided with an avoidance hole.

7. The linear motion output motor according to claim 1, characterized in that: The bottom of the housing is provided with a positioning groove, and the lower bracket is provided with a positioning block corresponding to the positioning groove.

8. The linear motion output motor according to claim 7, characterized in that: The lower bracket is provided with upward folded edges on two sides different from the positioning block.

9. The linear motion output motor according to claim 1, characterized in that: The lower bracket is provided with a through slot corresponding to the conductive sheet, and the end cover is provided with a contact slot corresponding to the through slot. The end cover is provided with a pin, and the contact end of the pin and the conductive sheet is located in the contact slot.

10. A method for realizing a linear motion output motor according to any one of claims 1 to 9, characterized in that: The following steps are involved: (a) The casing and the end cover form a closed cavity; (2) The magnet provides a driving magnetic field for the motor; (iii) When the coil is energized, the electric field and magnetic field interact to drive the output shaft to swing; (iv) The spring assembly connects the counterweight block and the lower bracket to provide elastic force for the swing of the output shaft, so that the output shaft swings left and right.

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