CN112155772B - Electric toothbrush drive shaft - Google Patents
Electric toothbrush drive shaft Download PDFInfo
- Publication number
- CN112155772B CN112155772B CN202011161135.8A CN202011161135A CN112155772B CN 112155772 B CN112155772 B CN 112155772B CN 202011161135 A CN202011161135 A CN 202011161135A CN 112155772 B CN112155772 B CN 112155772B
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- mounting
- block
- shaft
- shaft body
- groove
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
- A61C17/16—Power-driven cleaning or polishing devices
- A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
- A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
- A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
- H02K7/075—Means for converting reciprocating motion into rotary motion or vice versa using crankshafts or eccentrics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Brushes (AREA)
Abstract
The application relates to an electric toothbrush driving shaft, which comprises a shaft body and a connecting body arranged between the shaft body and an eccentric wheel, wherein the shaft body is hollow, and one end of the shaft body, which is close to the connecting body, is provided with a mounting hole for mounting the connecting body; the connecting body comprises a mounting sleeve body penetrating through the mounting port and a mounting block fixedly connected with the mounting sleeve body, and a connecting block is fixed in the mounting sleeve body; a fastening bolt penetrates through the shaft body, and the end part of the fastening bolt penetrates through the mounting sleeve body and is in threaded connection with the connecting block; the number of the fastening bolts is two, and the two fastening bolts are symmetrically arranged on two sides of the connecting block; a straight groove used for matching with the eccentric wheel is formed in the side wall, far away from the mounting sleeve body, of the mounting block. This application has the effect that prevents eccentric wheel and drive shaft and break away from.
Description
Technical Field
The present application relates to the field of electric toothbrushes, and in particular to an electric toothbrush drive shaft.
Background
Currently, in the related art, a driving motor and a driving shaft are provided inside a vibration type electric toothbrush, the driving motor and the driving shaft are connected together through an eccentric wheel, and one end of the driving shaft is provided with a linear groove for fitting the eccentric wheel. When the electric toothbrush is used, the driving motor drives the eccentric wheel to rotate, the driving shaft vibrates by utilizing eccentric motion, and the other end of the driving shaft is connected with the toothbrush head, so that the effect of high-frequency swinging of the toothbrush head of the electric toothbrush is achieved.
For example, the utility model with the publication number of CN209808609U discloses a driving shaft for an electric toothbrush, which comprises a shaft body, wherein one end of the shaft body is provided with a straight groove, and the shaft body is of a hollow structure; one end of the shaft body is detachably provided with a connecting buckle, and the straight groove penetrates through the connecting buckle along the radial direction of the shaft body; one end of the shaft body is of an opening structure; the connecting buckle comprises an inserting part which is inserted in the opening at the end part of the shaft body; the plug part is of a U-shaped structure, and the straight groove is formed on the inner side of the plug part.
In view of the above-mentioned related art, the inventors consider that the connection between the connecting buckle and the shaft body is weak, and the eccentric wheel is easily separated from the driving shaft.
Disclosure of Invention
To prevent the eccentric and the drive shaft from disengaging, the present application provides a drive shaft for a power toothbrush.
The application provides an electric toothbrush drive shaft adopts following technical scheme:
a driving shaft of an electric toothbrush comprises a shaft body and a connecting body arranged between the shaft body and an eccentric wheel, wherein the shaft body is hollow, and one end of the shaft body, close to the connecting body, is provided with a mounting hole for mounting the connecting body; the connecting body comprises a mounting sleeve body penetrating through the mounting port and a mounting block fixedly connected with the mounting sleeve body, and a connecting block is fixed in the mounting sleeve body; a fastening bolt penetrates through the shaft body, and the end part of the fastening bolt penetrates through the mounting sleeve body and is in threaded connection with the connecting block; the number of the fastening bolts is two, and the two fastening bolts are symmetrically arranged on two sides of the connecting block; a straight groove used for matching with the eccentric wheel is formed in the side wall, far away from the mounting sleeve body, of the mounting block.
Through adopting above-mentioned technical scheme, the installation piece of connector is used for cooperating with the eccentric wheel, and the fastening bolt who wears to establish on the axis body wears to locate the installation on the connector cover in vivo and with the internal connecting block threaded connection of installation cover to make fastening bolt not only restrict the removal along the axis body axis of connector, still have the tie point of the connector of injecing in many places, so strengthened being connected between connector and the axis body, be favorable to preventing to break away from the drive shaft with connector complex eccentric wheel.
Preferably, a plurality of adjusting holes arranged along the axis of the shaft body are formed in the shaft body, and the fastening bolts penetrate through the adjusting holes.
By adopting the technical scheme, when the fastening bolt is connected with the connecting body by penetrating different adjusting holes, the connecting body is different in the shaft body along the mounting position in the shaft body direction, so that the connecting position of the driving shaft and the eccentric wheel is adjusted, and the matching size of the driving shaft and the eccentric wheel is convenient to adjust.
Preferably, a limiting groove with a dovetail-shaped cross section is formed in the inner wall of the shaft body, the limiting groove is communicated with the end face of the mounting opening, and a limiting block in plug-in fit with the limiting groove is fixed on the outer wall of the mounting sleeve body.
Through adopting above-mentioned technical scheme, the setting of stopper and spacing groove for the installation cover body can be aligned with the regulation hole on the axis body after taking one's place in the axis body installation, thereby be convenient for fastening bolt wear to establish the installation.
Preferably, two long through grooves which are aligned with the two sides of the straight groove are symmetrically formed in the outer wall of the shaft body, and the inner side walls of the two sides of each long through groove are respectively flush with the inner side walls of the two sides of the straight groove.
Through adopting above-mentioned technical scheme, the setting of long logical groove for can with the axis body cooperation after eccentric wheel and the connection body cooperation, thereby make the load dispersion on the eccentric wheel to the axis body, reduce the load on the connection body, prevent that the connection body damage from breaking away from.
Preferably, the extension length of the long through groove is greater than the depth of the straight groove.
Through adopting above-mentioned technical scheme, the extension length in long logical groove is greater than the degree of depth in a word groove, and the connector of being convenient for is adjusted to different positions and all can be cooperated the eccentric wheel.
Preferably, the connecting block is made of elastic metal, and a compression elastic block is embedded in the connecting block; the end part of the fastening bolt is propped against the pressing elastic block.
Through adopting above-mentioned technical scheme, when fastening bolt screwed, fastening bolt supported tightly with compressing tightly the elastic block for compress tightly the elastic block by compressive deformation, thereby make and compress tightly the expansion of elastic block roof pressure connecting block, make the internal wall of the installation cover receive effort outwards, thereby make the installation cover body support tightly with the axis body inner wall, strengthened the joint strength of connector with the axis body.
Preferably, the axial direction of the fastening bolt is parallel to the inner side wall of the straight groove.
By adopting the technical scheme, when the fastening bolt is screwed, the mounting sleeve body is pressed by the internal top pressure, and the straight groove is tightened under the lever action, so that the mounting block is more tightly connected with the eccentric wheel.
Preferably, the depth of the straight groove on the mounting block is three-quarters of the length of the side of the mounting block parallel to the depth direction of the straight groove.
Through adopting above-mentioned technical scheme, the degree of depth setting of a word groove for a word groove can warp when fastening bolt screws and compresses tightly the eccentric wheel.
In summary, the present application includes at least one of the following beneficial technical effects:
the mounting block of the connecting body is used for matching with the eccentric wheel, and the fastening bolt penetrating through the shaft body is arranged in the mounting sleeve body on the connecting body and is in threaded connection with the connecting block in the mounting sleeve body, so that the fastening bolt not only limits the movement of the connecting body along the axis of the shaft body, but also has a plurality of connecting points for limiting the connecting body, thereby strengthening the connection between the connecting body and the shaft body and being beneficial to preventing the eccentric wheel matched with the connecting body from being separated from the driving shaft;
when the fastening bolt penetrates through different adjusting holes to be connected with the connecting body, the connecting body is arranged at different mounting positions in the shaft body along the shaft body direction, so that the connecting position of the driving shaft and the eccentric wheel is adjusted, and the matching size of the driving shaft and the eccentric wheel is convenient to adjust;
when the fastening bolt is screwed, the mounting sleeve body is pressed by the inner part, and the linear groove is tightened under the action of the lever, so that the mounting block is more tightly connected with the eccentric wheel.
Drawings
Fig. 1 is a schematic view showing the construction of a drive shaft of an electric toothbrush according to an embodiment of the present invention.
Fig. 2 is a schematic view showing an internal structure of a drive shaft of the electric toothbrush according to the embodiment of the present application.
Fig. 3 is a schematic view of the internal structure of the connection block.
Description of reference numerals: 1. a shaft body; 11. an installation port; 12. a long through groove; 13. a limiting groove; 14. an adjustment hole; 2. a linker; 21. mounting a sleeve body; 211. a communicating hole; 22. mounting blocks; 221. a straight slot; 3. fastening a bolt; 4. connecting blocks; 41. a threaded hole; 42. an accommodating chamber; 43. compressing the elastic block.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a drive shaft of an electric toothbrush. Referring to fig. 1, the driving shaft of the electric toothbrush includes a shaft body 1, a connection body 2, and a fastening bolt 3. Referring to fig. 2, the shaft body 1 is hollow cylindrical, and a mounting opening 11 is formed in an end surface of the shaft body adjacent to one end of the eccentric wheel, so that the end surface of the shaft body 1 is annular. The connecting body 2 includes a mounting sleeve 21 and a mounting block 22, the mounting sleeve 21 is a sleeve-shaped structure with a circular opening, the mounting block 22 is a circular block, and the mounting block 22 and the mounting sleeve 21 are sequentially arranged along the axis direction of the shaft body 1. The circular terminal surface of one end of the installation piece 22 coincides with and is fixed to the circular terminal surface of the installation cover body 21, and when the connector 2 is installed, the installation cover body 21 penetrates into the shaft body 1 through the installation opening 11, and the outer side wall of the installation cover body 21 is in sliding fit with the inner side wall of the shaft body 1.
Referring to fig. 1 and 2, a straight groove 221 is formed in the end surface of the mounting block 22 away from the mounting sleeve body 21, the depth of the straight groove 221 is three-fourths of the axial length of the mounting block 22, and two ends of the straight groove 221 are both communicated with the cylindrical surface of the mounting block 22. Seted up long logical groove 12 on the outer wall of axis body 1, long logical groove 12 extends along the length direction of axis body 1, and long logical groove 12 and the 11 terminal surfaces of installing port of axis body 1 intercommunication. The two side inner walls of the long through groove 12 are flush with the two side inner walls of the straight groove 221 respectively, the long through groove 12 is provided with two positions on the shaft body 1, and the two long through grooves 12 are arranged on two sides of the mounting block 22 respectively. The provision of the slotted groove 221 and the elongated through-groove 12 allows the mounting block 22 and thus the shaft body 1 to be fitted to the eccentric. Limiting groove 13 has been seted up to axis body 1 inner wall, and limiting groove 13 extends along the length direction of axis body 1, and limiting groove 13 perpendicular to its self extending direction's cross-section is the dovetail. The limiting groove 13 is provided with two positions, the two limiting grooves 13 are respectively arranged on two sides of the mounting sleeve body 21 in the shaft body 1, and the limiting groove 13 is communicated with the end face where the mounting opening 11 of the shaft body 1 is located. A limiting block is fixed on the outer wall of the mounting sleeve body 21 and is in a dovetail shape, the limiting block is embedded in the limiting groove 13 and is matched with the inner wall of the limiting groove 13 in a sliding manner, so that the mounting sleeve body 21 can be slidably mounted on the inner wall of the shaft body 1, and after the mounting sleeve body 21 is mounted in place, the straight groove 221 in the mounting block 22 can be aligned with the long through groove 12.
Referring to fig. 1 and 2, the outer wall of the shaft body 1 is further provided with two groups of adjusting holes 14, the adjusting holes 14 of each group are uniformly arranged along the axis direction of the shaft body 1, the two groups of adjusting holes 14 are respectively arranged on two sides of the shaft body 1, and the axes of the two groups of corresponding adjusting holes 14 coincide. The opening of the adjusting hole 14 is circular, the outer wall of the mounting sleeve 21 is provided with a communicating hole 211, the opening of the communicating hole 211 is circular, and the communicating hole 211 is provided with two positions and is respectively positioned at two sides of the mounting sleeve 21. After the mounting sleeve 21 is mounted in place, the communication hole 211 on the mounting sleeve 21 is aligned with the two adjustment holes 14 with the axes coinciding, at this time, the end of the fastening bolt 3 sequentially passes through the adjustment holes 14 and the communication hole 211 and extends into the mounting sleeve 21, and in addition, the fastening bolt 3 is abutted against the inner walls of the communication hole 211 and the adjustment holes 14.
Referring to fig. 2, the mounting sleeve 21 is internally provided with a connecting block 4, the connecting block 4 is rectangular, the length direction of the connecting block is perpendicular to the axis of the mounting sleeve 21, and two ends of the connecting block 4 are fixed to the arc-shaped inner wall of the mounting sleeve 21. Referring to fig. 3, a threaded hole 41 is formed in the upper surface of the mounting block 22, the threaded hole 41 penetrates through the mounting block 22, and the connecting block 4 is made of a copper block. The connecting block 4 is internally provided with a containing cavity 42, the containing cavity 42 is cylindrical, the axis of the containing cavity 42 coincides with the axis of the threaded hole 41, and the threaded hole 41 penetrates through the containing cavity 42. The containing cavity 42 is internally provided with a pressing elastic block 43, the pressing elastic block 43 is in a circular block shape, the pressing elastic block 43 is attached to and abutted against the inner wall of the containing cavity 42, and in addition, the pressing elastic block 43 is made of rubber. The two fastening bolts 3 are arranged, the axes of the two fastening bolts 3 are overlapped, and the two fastening bolts 3 penetrate into the mounting sleeve body 21 through the two adjusting holes 14 on the two sides of the shaft body 1 respectively. The end parts of the fastening bolts 3 penetrate into the threaded holes 41 of the connecting block 4 and are in threaded fit with the threaded holes 41, when the fastening bolts 3 are screwed tightly, the end parts of the two fastening bolts 3 extrude and press the elastic blocks 43, so that the connecting block 4 expands and presses the mounting sleeve body 21, and the mounting sleeve body 21 is tightly pressed against the inner wall of the shaft body 1.
The implementation principle of the electric toothbrush driving shaft in the embodiment of the application is as follows: the installation piece 22 of connector 2 is used for cooperating with the eccentric wheel, and the fastening bolt 3 of wearing to establish on the axis body 1 wears to locate in the installation cover body 21 on the connector 2 and with the 4 threaded connection of the connecting block in the installation cover body 21, thereby make fastening bolt 3 not only restrict the removal of connector 2 along the axis body 1, still have the tie point of many places limited connector 2, so strengthened the connection between connector 2 and the axis body 1, be favorable to preventing to break away from the drive shaft with connector 2 complex eccentric wheel.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. An electric toothbrush drive shaft characterized by: the eccentric wheel connecting shaft comprises a shaft body (1) and a connecting body (2) arranged between the shaft body (1) and an eccentric wheel, wherein the shaft body (1) is hollow, and one end, close to the connecting body (2), of the shaft body (1) is provided with a mounting hole (11) for mounting the connecting body (2); the connecting body (2) comprises a mounting sleeve body (21) penetrating through the mounting opening (11) and a mounting block (22) fixedly connected with the mounting sleeve body (21), and a connecting block (4) is fixed in the mounting sleeve body (21); a fastening bolt (3) penetrates through the shaft body (1), and the end part of the fastening bolt (3) penetrates through the mounting sleeve body (21) and is in threaded connection with the connecting block (4); the number of the fastening bolts (3) is two, and the two fastening bolts (3) are symmetrically arranged on two sides of the connecting block (4); a straight groove (221) used for matching with an eccentric wheel is formed in the side wall, away from the mounting sleeve body (21), of the mounting block (22); the connecting block (4) is made of elastic metal, and a compression elastic block (43) is embedded in the connecting block (4); the end part of the fastening bolt (3) is propped against the pressing elastic block (43).
2. A power toothbrush drive shaft according to claim 1, wherein: the shaft body (1) is provided with a plurality of adjusting holes (14) arranged along the axis of the shaft body (1), and the fastening bolt (3) penetrates through the shaft body (1) through the adjusting holes (14).
3. A power toothbrush drive shaft according to claim 1, wherein: the shaft body (1) is provided with a limiting groove (13) with a dovetail-shaped cross section on the inner wall, the limiting groove (13) is communicated with the end face of the mounting opening (11), and a limiting block which is in splicing fit with the limiting groove (13) is fixed on the outer wall of the mounting sleeve body (21).
4. A power toothbrush drive shaft according to claim 1, wherein: two long through grooves (12) which are aligned with the two sides of the straight groove (221) are symmetrically formed in the outer wall of the shaft body (1), and the inner side walls of the two sides of each long through groove (12) are flush with the inner side walls of the two sides of the straight groove (221) respectively.
5. An electric toothbrush drive shaft according to claim 4, wherein: the extending length of the long through groove (12) is larger than the depth of the straight groove (221).
6. A power toothbrush drive shaft according to claim 1, wherein: the axial direction of the fastening bolt (3) is parallel to the inner side wall of the straight groove (221).
7. A power toothbrush drive shaft according to claim 1, wherein: the depth of the straight groove (221) on the mounting block (22) is three quarters of the length of the side of the mounting block (22) parallel to the depth direction of the straight groove (221).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011161135.8A CN112155772B (en) | 2020-10-27 | 2020-10-27 | Electric toothbrush drive shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011161135.8A CN112155772B (en) | 2020-10-27 | 2020-10-27 | Electric toothbrush drive shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112155772A CN112155772A (en) | 2021-01-01 |
| CN112155772B true CN112155772B (en) | 2022-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011161135.8A Active CN112155772B (en) | 2020-10-27 | 2020-10-27 | Electric toothbrush drive shaft |
Country Status (1)
| Country | Link |
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| CN (1) | CN112155772B (en) |
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| CN112155772A (en) | 2021-01-01 |
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