Mute gear box for shaver

Abstract

The utility model relates to a mute gear box for a shaver, which comprises a box body and an interface arranged at the bottom of the box body, and is characterized in that a surface platform is arranged at the top of the box body, a mounting circular groove is arranged at the top of the surface platform, a turntable is rotatably arranged in the mounting circular groove, an inner gear ring is embedded at the bottom of the turntable, and an outer gear ring is arranged at the top of the turntable; a plurality of second rotating holes are formed in the edge of the surface table, rotating shafts are rotationally arranged in the second rotating holes, and fine gears are mounted on the rotating shafts. According to the utility model, the inversely buckled turntable is arranged and is completely embedded into the mounting circular groove to form a closed space, so that certain noise reduction control can be carried out on the output shaft part of the motor; by arranging the inner gear ring meshed with the driving gear, the contact area of the inner gear ring and the driving gear is increased, impact force generated during meshing is dispersed, noise is reduced, meanwhile, the slip rate between the inner gear ring and the driving gear is reduced, the meshing action becomes relatively stable, and noise generated by vibration is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of silent gear boxes, and in particular relates to a silent gear box for a shaver. Background Art

[0002] Many electric shavers generate a lot of noise during operation. Users who are in a high-noise environment for a long time will feel irritated and uncomfortable, which seriously affects the comfort of the shaving process. This discomfort not only affects the user, but also causes unnecessary interference to the entire home environment.

[0003] One of the main sources of noise in electric shavers is their internal gear transmission system. After the shaver is started, the motor quickly drives the gears to rotate at high speed, driving the blades to reciprocate or rotate and cut to effectively remove the beard. During this period, the close contact between the gears will inevitably cause friction and collision, and the unstable operating state will also generate noise. In addition, the vibration of the motor itself during operation will also generate noise. Multiple factors together constitute a high-noise environment. Utility Model Content

[0004] The purpose of the present utility model is to provide a silent gear box for a shaver, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a silent gear box for a shaver, comprising a box body, an interface is provided at the bottom of the box body, a surface table is installed on the top of the box body, a mounting circular groove is opened on the top of the surface table, a turntable is rotatably installed in the mounting circular groove, an inner gear ring is embedded in the bottom of the turntable, an outer gear ring is provided on the top of the turntable, a plurality of second rotating holes are opened at the edge of the surface table, a rotating shaft is rotatably provided in each of the second rotating holes, and a fine gear is installed on the rotating shaft.

[0006] Preferably, a first rotating hole is provided in the mounting circular groove, and the output shaft at the top of the box body passes through the first rotating hole and is connected to a driving gear.

[0007] Preferably, the table is a triangular table, and the number of the second rotating holes is 3, which are respectively opened at the angle positions of the triangular table.

[0008] Preferably, baffles are provided on the three sides of the triangular platform, mounting holes are provided on the inner sides of the baffles, and a top plate is installed between the mounting holes.

[0009] Preferably, an expansion hole is opened at the angle of the top plate, and the rotating shaft passes through the expansion hole and protrudes from the top plate.

[0010] Preferably, the inner gear ring, outer gear ring, fine gear and driving gear all have fine and high teeth.

[0011] Preferably, the inner gear ring, outer gear ring, fine gear and driving gear are all made of Hytrel silent material.

[0012] Preferably, a special-shaped plate is provided on the top of the top plate, and three limiting grooves are recessed on the outer side of the special-shaped plate, and limiting plates are provided at the corner edges of the top plate.

[0013] Preferably, side joints are installed at the lateral sides of the top plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides an inverted turntable, which forms a closed space after being fully embedded in the mounting circular groove, and can perform certain noise reduction control on the output shaft of the motor; the present invention provides an inner gear ring that meshes with the driving gear, thereby increasing the contact area between the two, thereby dispersing the impact force generated during meshing, reducing noise, and reducing the slip rate between the two, so that the meshing action becomes relatively smooth, reducing the noise caused by vibration; the present invention also provides the gears with fine and high teeth, increases the overlap between the gears, thereby promoting the continuity and smoothness of the gear transmission, thereby reducing the noise generated by the impact of gear meshing, and at the same time increases the meshing line length of the gears to enhance the meshing stiffness between the gears, which can help reduce the deformation and vibration of the gears during the meshing process, thereby reducing noise; the present invention also uses Hytrel silent material as the gear material, and absorbs and disperses the vibration energy during gear meshing through the elasticity and strength of the material itself, thereby reducing noise during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is an exploded view of the utility model;

[0017] Figure 3 It is a partial exploded view of the utility model;

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the surface table of the utility model;

[0019] Figure 5 It is a partial cross-sectional view of the present utility model.

[0020] Numbers in the figure: 1-box, 2-interface, 3-surface table, 4-mounting circular groove, 5-turntable, 6-inner gear ring, 7-outer gear ring, 8-second rotating hole, 9-rotating shaft, 10-fine gear, 11-first rotating hole, 12-driving gear, 13-triangular table, 14-baffle, 15-mounting hole, 16-top plate, 17-expansion hole, 18-special-shaped plate, 19-limiting groove, 20-limiting plate, 21-side joint. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0022] Example 1

[0023] like Figures 1 to 5 The silent gear box for a shaver shown in the figure comprises a box body 1, an interface 2 is provided at the bottom of the box body 1, a face table 3 is installed on the top of the box body 1, a mounting circular groove 4 is opened on the top of the face table 3, a turntable 5 is rotatably installed in the mounting circular groove 4, an inner gear ring 6 is embedded in the bottom of the turntable 5, an outer gear ring 7 is provided on the top of the turntable 5, a plurality of second rotating holes 8 are opened at the edge of the face table 3, a rotating shaft 9 is rotatably provided in each of the second rotating holes 8, and a fine gear 10 is installed on the rotating shaft 9; a first rotating hole 11 is opened in the mounting circular groove 4, and the output shaft at the top of the box body 1 passes through the first rotating hole 11 and is connected to a driving gear 12; the face table 3 is a triangular table 13, and the number of second rotating holes 8 is 3, which are respectively opened at the included angles of the triangular table 13 The three sides of the triangular table 13 are provided with baffles 14, the inner side of the baffles 14 is provided with mounting holes 15, and a top plate 16 is installed between the mounting holes 15; an expansion hole 17 is opened at the angle of the top plate 16, and the rotating shaft 9 passes through the expansion hole 17 and protrudes from the top plate 16; the inner ring gear 6, the outer ring gear 7, the fine gear 10, and the driving gear 12 are all designed with fine and high teeth; the inner ring gear 6, the outer ring gear 7, the fine gear 10, and the driving gear 12 are all made of Hytrel silent material; a special-shaped plate 18 is provided on the top of the top plate 16, and three limiting grooves 19 are recessed on the outer side of the special-shaped plate 18, and limiting plates 20 are provided at the edges of the angle of the top plate 16; a side joint 21 is installed at the horizontal position of the top plate 16.

[0024] The utility model provides an inverted turntable 5, which forms a closed space after being fully embedded in the mounting circular groove 4, and can perform a certain noise reduction control on the output shaft of the motor; the utility model provides an inner gear ring 6 that meshes with the driving gear 12, thereby increasing the contact area between the two, thereby dispersing the impact force generated during meshing, reducing noise, and at the same time reducing the slip rate between the two, so that the meshing action becomes relatively smooth, reducing the noise caused by vibration; the utility model also designs the gears with fine and high teeth, increases the overlap between the gears, and thus promotes the continuity and stability of the gear transmission, thereby reducing the noise generated by the impact of gear meshing, and at the same time increases the meshing line length of the gears to enhance the meshing stiffness between the gears, which can help reduce the deformation and vibration of the gears during the meshing process, thereby reducing noise; the utility model also uses Hytrel silent material as the gear material, and through the elasticity and strength of the material itself, absorbs and disperses the vibration energy during gear meshing, thereby reducing noise during operation.

[0025] Example 2

[0026] like Figures 1 to 5 A silent gearbox for a shaver is shown, comprising a housing 1. Housing 1 can usually be used as a battery box for the shaver, or as a small motor. The operation of the motor can drive the gear to rotate through the output shaft, thereby indirectly driving the shaver head. Here, the shaver head is directly set to a circular blade, which is not shown in the figure. Compared with the traditional flat blade head, the circular blade head will fit the skin better when shaving, and will become easier and smoother when dealing with complex curved areas such as facial contours, neck, and chin, so as to provide a more comfortable shaving experience. An interface 2 is provided at the bottom of the housing 1, which can be used as a power supply. After the product is installed in the outer shell of the shaver, the motor can be powered through the bottom interface 2.

[0027] A face table 3 is installed on the top of the box body 1. The shape of the face table 3 is set according to the cutter heads to be installed. The two-head shaver can be distributed symmetrically on the left and right, and the shape of the face table 3 can be rectangular; the cutter heads of the three-head shaver are respectively located at the three corners of the face table 3, and the shape of the face table 3 can be triangular; the corresponding shape of the four-head shaver can be inferred to be square, and so on; the angle edges of the face table 3 are all rounded, that is, they are adapted to the rotation arc of the circular cutter heads, and at the same time, it can also avoid the face being scratched due to the sharp edge angle when the face table 3 comes into contact with the human face.

[0028] like Figure 4As shown, in this embodiment, for ease of understanding, the table 3 is set as a common triangular table 13, and its three corners are equipped with circular cutter heads. A mounting circular groove 4 is opened in the triangular table 13, and the radius length of the mounting circular groove 4 is close to the distance between the center point and the side length of the triangular table 13. A first rotating hole 11 is provided in the mounting circular groove 4 at a position away from the center point. The output shaft at the top of the box body 1 passes through the first rotating hole 11 and is connected to the driving gear 12, that is, the box body 1 can drive the driving gear 12 to rotate after being powered on, thereby driving its subsequent circular cutter heads to rotate.

[0029] Furthermore, a turntable 5 is rotatably installed at the center position of the circular groove 4. The turntable 5 is specifically an inverted barrel shape. The inner wall of the bottom of the turntable 5 is provided with an inner ring gear 6. The driving gear 12 is located below the turntable 5 and engages with the inner ring gear 6; that is, the box body 1 can drive the driving gear 12 to rotate after being powered on, and through the engagement of the driving gear 12 with the inner ring gear 6, the inner ring gear 6 is also driven to rotate.

[0030] It's important to note that the motor, as the core component of an electric shaver, is not only the power source that drives the blades to rotate and operate, but also the noise generated by the motor itself during high-speed operation is one of the primary sources of noise in an electric shaver, with the motor's output shaft being the largest source of noise. Therefore, in this embodiment, the inverted turntable 5 is fully embedded in the mounting groove 4, forming a relatively enclosed space that provides some noise reduction control for the motor's output shaft. Furthermore, the internal gear ring 6, which meshes with the drive gear 12, significantly reduces noise in this area. When the drive gear 12 meshes with the internal gear ring 6, the contact area between them is relatively large due to the special tooth profiles. A larger contact area disperses the impact force generated during meshing, thereby reducing noise. Furthermore, compared to external gears, internally meshing gears have a lower relative slip between the gears, resulting in a relatively smoother meshing, which in turn reduces noise generated by vibration.

[0031] Example 3

[0032] like Figures 1 to 5 The silent gearbox for a shaver shown has three cutter heads. Second rotating holes 8 are provided at the three included angles of the triangular platform 13. Rotating shafts 9 are provided in the second rotating holes 8. Fine gears 10 are mounted on the rotating shafts 9, i.e., there are three fine gears 10 in total, corresponding to the three cutter heads. As described in Example 2, the inverted turntable 5 is completely embedded in the mounting groove 4, so the fine gears 10 are higher than the turntable 5. When an outer gear ring 7 is provided on the top of the turntable 5, when the outer gear ring 7 reaches a certain size and number of teeth, it can drive the outer gear ring 7 to rotate when the turntable 5 rotates. Then, through the meshing of the outer gear ring 7 with the three fine gears 10, the fine gears 10 and the cutter heads are indirectly rotated, realizing the basic functions of the electric shaver.

[0033] Specifically, the top surface of the triangular platform 13 is equipped with four gears: an outer ring gear 7 at the center, and three fine gears 10 meshing with and surrounding the outer ring gear 7. A top plate 16 is also provided to cover the gears, protecting the mechanical components and thus extending the life of the shaver. Since the top plate 16 covers the mechanical components below it, it also reduces noise transmission to a certain extent. Each of the three sides of the triangular platform 13 is provided with a baffle 14, with mounting holes 15 defined within the baffle 14. The top plate 16 is mounted between the mounting holes 15. The top plate 16 is triangular in shape, similar to the face plate 3, but is larger than the triangular platform 13 and the edges of the three fine gears 10 at the angle. This prevents the fine gears 10 from protruding from the outside of the top plate 16, which could cause an unpleasant user experience.

[0034] The three angles of the top plate 16 are consistent with the triangular table 13, and an expansion hole 17 is opened at the angle position. The center of the expansion hole 17 is located directly above the rotating shaft 9, and then the rotating shaft 9 extends upward through the expansion hole 17 and protrudes from the top plate 16. Then, it is only necessary to install a circular cutter head on the protruding part of the rotating shaft 9 to form the basic form of the shaver. The specific usage status is: the motor is energized to drive the output shaft to rotate, driving the drive gear 12 to rotate, and the drive gear 12 rotates through the inner ring gear 6 to drive the turntable 5 to rotate, and then drives the outer ring gear 7 on it to rotate and engage with the fine gear 10. Finally, the fine gear 10 rotates through the rotating shaft 9 to drive the circular cutter head on it to rotate synchronously. At this time, the user gently fits the circular cutter head to the face, and then shaves with a gentle circular motion. It is necessary to press the cutter head with force throughout the process to cause skin irritation or cutter head blunting.

[0035] In this embodiment, the central outer ring gear 7 and the three fine gears 10 meshing with and surrounding it are all designed with high-profile teeth, employing a large addendum height coefficient and a small pressure angle to achieve high gear contact. Contact refers to the ratio of the actual meshing line length of the gears to the base circle pitch. A greater contact improves the continuity and smoothness of the gear transmission, thereby reducing noise caused by gear meshing impact. Furthermore, the high-profile design increases the meshing line length of the gears. A longer meshing line increases meshing stiffness, which helps reduce deformation and vibration during gear meshing, thereby reducing noise.

[0036] That is, the fine and high tooth design can effectively reduce the meshing noise of the gears and improve the bending fatigue strength of the gear tooth roots, thereby enhancing the load-bearing capacity of the gears. In another feasible method, this type of design can also be applied to all gears in this product, thereby reducing the overall noise of the electric shaver.

[0037] Example 4

[0038] like Figures 1 to 5A silent gearbox for a razor is shown. In this embodiment, a limiting component is also provided for the installation of a circular cutter head. A special-shaped plate 18 is provided on the top of the top plate 16. Three limiting grooves 19 are recessed on the outer side of the special-shaped plate 18. The limiting grooves 19 respectively surround the inner side surface of the rotating shaft 9, that is, the inner side of the cutter head after the cutter head is installed; at the same time, limiting plates 20 are symmetrically provided at the angle edge of the top plate 16 and on the outer side surface of the rotating shaft 9. Every two limiting plates 20 correspond to one limiting groove 19. The three form the installation area of ​​the circular cutter head, thereby realizing limiting protection for the circular cutter head after installation.

[0039] Moreover, the present embodiment also has a side scraping structure, specifically a side joint 21 and a side scraper blade, which are not shown in the figure. The side joint 21 is protrudingly installed on the horizontal edge of the top plate 16, and a side scraper blade is hinged on the top of the side joint 21. When the razor is not needed, the side scraper blade is folded and retracted to the outside of the horizontal edge of the top plate 16. At this time, the blade of the side scraper blade faces downward to avoid cutting others. When the razor is in use, the user can shave the facial beard with the three circular blade heads, and at the same time, the side scraper blade can be unfolded with the blade facing outward to repair the details such as the sideburns, eyebrows and hairline by pushing and pulling. The two work together to achieve more demanding, high-precision and good trimming effects.

[0040] Example 5

[0041] In a silent gearbox for a razor shown in Examples 1-4, all gears can be made of any shock-absorbing and silent material, specifically Hytrel silent material, that is, TPEE thermoplastic polyester elastomer material. Since TPEE material has the elasticity of rubber and the strength of engineering plastics, it can effectively absorb and disperse vibration energy, thereby reducing the noise during gear operation; and TPEE material has both the softness of rubber and the mechanical strength of thermoplastics, so that the Hytrel silent gears have sufficient strength and durability to withstand large loads and long-term operation; at the same time, compared with ordinary materials, TPEE material is easier to process and shape, and can be easily processed through various processes such as injection molding and extrusion. The gears produced have smaller errors, thereby supporting more stable and precise operation.

[0042] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0043] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A silent gear box for a shaver, comprising a box body (1), wherein an interface (2) is provided at the bottom of the box body (1), characterized in that: A table (3) is installed on the top of the box (1), a mounting circular groove (4) is provided on the top of the table (3), a turntable (5) is rotatably installed in the mounting circular groove (4), an inner gear ring (6) is embedded in the bottom of the turntable (5), an outer gear ring (7) is provided on the top of the turntable (5), a plurality of second rotating holes (8) are provided at the edge of the table (3), a rotating shaft (9) is rotatably provided in each of the second rotating holes (8), and a fine gear (10) is installed on the rotating shaft (9).

2. A silent gearbox for a shaver according to claim 1, characterized in that: A first rotating hole (11) is provided in the mounting circular groove (4), and an output shaft at the top of the box body (1) passes through the first rotating hole (11) and is connected to a driving gear (12).

3. A silent gear box for a shaver according to claim 1, characterized in that: The surface platform (3) is a triangular platform (13), and the number of the second rotating holes (8) is 3, which are respectively opened at the angle positions of the triangular platform (13).

4. A silent gear box for a shaver according to claim 3, characterized in that: Baffles (14) are provided on three sides of the triangular platform (13), mounting holes (15) are provided inside the baffles (14), and a top plate (16) is installed between the mounting holes (15).

5. A silent gear box for a shaver according to claim 4, characterized in that: An expansion hole (17) is provided at an angle of the top plate (16), and the rotating shaft (9) passes through the expansion hole (17) and protrudes from the top plate (16).

6. A silent gear box for a shaver according to claim 2, characterized in that: The inner gear ring (6), outer gear ring (7), fine gear (10) and driving gear (12) all have fine high teeth.

7. A silent gear box for a shaver according to claim 6, characterized in that: The inner gear ring (6), the outer gear ring (7), the fine gear (10), and the driving gear (12) are all made of Hytrel silent material.

8. A silent gear box for a shaver according to claim 4, characterized in that: A special-shaped plate (18) is provided on the top of the top plate (16), and three limiting grooves (19) are recessed on the outer side of the special-shaped plate (18). Limiting plates (20) are provided at the edges of the included angles of the top plate (16).

9. A silent gear box for a shaver according to claim 4, characterized in that: A side joint (21) is installed at the horizontal side of the top plate (16).

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