CN212297514U - Inclined plastic gear box structure of dental handpiece - Google Patents
Inclined plastic gear box structure of dental handpiece Download PDFInfo
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- CN212297514U CN212297514U CN202020903163.1U CN202020903163U CN212297514U CN 212297514 U CN212297514 U CN 212297514U CN 202020903163 U CN202020903163 U CN 202020903163U CN 212297514 U CN212297514 U CN 212297514U
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Abstract
The utility model provides an oblique plastic gear box structure of a dental handpiece, which comprises a box body, wherein the box body comprises a straight internal gear part and a smooth inserting part, an oblique internal gear is arranged in the smooth inserting part, and a clamping lug is integrally formed on the oblique internal gear; a first planet carrier is arranged in the helical inner gear, a first input shaft is arranged on one surface of the first planet carrier, a first output end is arranged on the other surface of the first planet carrier, a planetary helical gear is arranged on the first input shaft, and the planetary helical gear is connected with a motor helical gear; one end of the inclined inner gear is provided with a bottom plate, and one end of the bottom plate is provided with a clamping groove; the straight internal gear thread portion is internally provided with a second planet carrier, one side of the second planet carrier is provided with a second input shaft, the other side of the second planet carrier is provided with a second output end, the second input shaft is provided with a straight planet gear, the straight planet gear is connected with a straight sun gear, the straight sun gear is fixed with the first output end, and the second output end is fixed with an output shaft. The utility model discloses inner structure is compact stable, and the assembly precision is high, and job stabilization is smooth-going.
Description
Technical Field
The utility model relates to a gear box specifically discloses a dental handpiece's oblique plastic gear case structure.
Background
The dental handpiece is a short term dental high-speed turbine handpiece, and the interior of the dental handpiece contains a gear box structure to adjust the final output rotating speed. The gearbox is generally referred to as a speed change gearbox, and the rotating speed of the output end is adjusted through a plurality of gear combinations.
In the prior art, a gear box of a dental handpiece usually comprises a straight internal gear and a planetary straight gear set, so that the gear box has insufficient transmission stability and low matching precision, and is easy to generate large vibration when running at a high rotating speed, thereby forming large noise.
SUMMERY OF THE UTILITY MODEL
Therefore, the inclined plastic gearbox structure of the dental handpiece is needed to be provided aiming at the problems in the prior art, the internal structure is compact and stable, the transmission is stable, and the vibration formed during the work is small.
In order to solve the prior art problem, the utility model discloses an oblique plastic gear box structure of dental handpiece, including the box, the box includes integrated into one piece straight internal tooth line portion and smooth joint portion, is equipped with oblique internal gear in the smooth joint portion, and the inner radius of smooth joint portion is R, and the outer radius of oblique internal gear is R, and R ═ R is equipped with spacing hole on the smooth joint portion, and the oblique internal gear keeps away from the one end integrated into one piece of straight internal tooth line portion and has the screens lug;
a first planet carrier is arranged in the helical gear, n first input shafts are fixed on one surface of the first planet carrier, which is far away from the straight internal gear pattern part, n is an integer larger than 2, all the first input shafts are rotationally symmetrical about the circle center of the first planet carrier, a first output end is arranged at the circle center of the other surface of the first planet carrier, a planetary helical gear is sleeved on each first input shaft and is in meshed connection with the helical gear, motor helical gears are meshed and connected among all the planetary helical gears, and the helical gear and/or the planetary helical gears are plastic parts;
a bottom plate is arranged at one end of the inclined inner gear, which is far away from the straight inner gear pattern part, a motor abdicating hole is arranged in the bottom plate, a clamping groove is arranged at one end of the bottom plate, which is close to the inclined inner gear, a clamping lug is in clamping connection with the clamping groove, a screw hole is arranged on the bottom plate, and a screw passes through the limiting hole and is in threaded connection with the screw hole;
a second planet carrier is arranged in the straight internal gear thread part, m second input shafts are fixed on one surface, close to the oblique internal gear, of the second planet carrier, m is an integer larger than 2, all the second input shafts are rotationally symmetrical relative to the circle center of the second planet carrier, a second output end is arranged at the circle center of the other surface of the second planet carrier, a planet straight gear is sleeved on each second input shaft and is meshed with the straight internal gear thread part, a sun straight gear is meshed and connected among all the planet straight gears, the sun straight gear is fixedly connected with the first output end, and the second output end is fixedly connected with an output shaft;
and a cover plate is arranged at one end of the second planet carrier, which is far away from the first planet carrier, and the cover plate is sleeved outside the output shaft.
Furthermore, the limiting holes are p, p is an integer larger than 2, and the screw holes are also p.
Furthermore, the screens lug is equipped with q, and q is for being greater than 1 integer, and the screens recess also is equipped with q.
Furthermore, an annular first gasket is arranged between the planetary bevel gear and the bottom plate.
Furthermore, an annular second gasket is arranged between the sun straight gear and the first planet carrier.
Furthermore, a circular third gasket is arranged between the second planet carrier and the cover plate, and the third gasket is sleeved outside the output shaft.
Furthermore, one side of the cover plate, which is far away from the box body, is provided with a fixed sleeve.
The utility model has the advantages that: the utility model discloses an oblique plastic gear box structure of a dental handpiece, which is provided with a two-stage planetary gear set structure, has compact and stable internal structure and can effectively avoid the gear box from shaking greatly; the bevel gear set is connected with the output end of the motor, the matching precision is high, the transmission stability is high, the working stability can be effectively improved, and the vibration and the noise formed during working are small; the split inclined internal gear and the straight internal gear can be processed separately, the processing difficulty is low, the inclined internal gear is tightly attached to the smooth inserting part, the concentricity between the straight internal gear and the inclined internal gear can be effectively ensured, the assembly precision is high, and the work is stable and smooth; in addition, the oblique inner gear is connected with the bottom plate in a clamping manner, so that the torque borne by the oblique inner gear can be effectively transmitted, the stability of the whole structure is ensured, and the assembly is convenient.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic sectional view of the present invention.
Fig. 3 is a schematic view of the exploded structure of the present invention.
Fig. 4 is an exploded view of another view angle of the present invention.
The reference signs are: the gear box comprises a box body 10, a straight internal thread part 11, a smooth plug part 12, a limiting hole 121, a helical gear 20, a clamping convex block 21, a first planet carrier 30, a first input shaft 31, a first output end 32, a planetary helical gear 33, a motor helical gear 34, a bottom plate 40, a motor abdicating hole 41, a clamping groove 42, a screw hole 43, a screw 44, a first gasket 45, a second planet carrier 50, a second input shaft 51, a second output end 52, a planetary straight gear 53, a sun straight gear 54, an output shaft 55, a second gasket 56, a cover plate 60, a third gasket 61 and a fixing sleeve 62.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Refer to fig. 1 to 4.
The embodiment of the utility model discloses dental handpiece's oblique plastic gear case structure, including being the box 10 that leads to the cylinder in, box 10 includes integrated into one piece's straight internal tooth line portion 11 and smooth joint portion 12 that set up with the axle center, straight internal tooth line portion 11 is straight internal gear structure, smooth joint portion 12 is the smooth circular sleeve structure of inner wall, be equipped with oblique internal gear 20 in the smooth joint portion 12, the inner radius of smooth joint portion 12 is R, the outer radius of oblique internal gear 20 is R, R ═ R, can ensure to hug closely between oblique internal gear 20 and the smooth joint portion 12 and be connected, thereby ensure the concentric precision of oblique internal gear 20 and straight tooth line portion, be equipped with spacing hole 121 on the smooth joint portion 12, one end integrated into one piece that oblique internal gear 20 keeps away from straight internal tooth line portion 11 has screens lug 21;
a first disk-shaped planet carrier 30 is arranged in the helical internal gear 20, one surface of the first planet carrier 30, which is far away from the straight internal gear 11, is fixed with n first input shafts 31, n is an integer greater than 2, preferably, n is 3 or 4, all the first input shafts 31 are rotationally symmetrical about the center of the first planet carrier 30, the center of the other surface of the first planet carrier 30 is provided with a first output end 32, namely the first output end 32 is positioned at one side of the first planet carrier 30, which is close to the straight internal gear 11, each first input shaft 31 is sleeved with a planet helical gear 33, all the planet helical gears 33 are meshed with the helical internal gear 20, the motor helical gears 34 are meshed and connected among all the planet helical gears 33, namely, each planet helical gear 33 surrounds and is meshed with the motor helical gear 34, the helical gear 20 and/or the planet helical gears 33 are plastic parts, and the meshing transmission stability can be improved, meanwhile, vibration and noise formed during meshing transmission can be further reduced, the noise can be reduced from 60-65 dB to 45-50 dB, the noise reduction performance is good, and preferably, the box body 10 is a metal piece, so that the impact resistance of the whole structure can be effectively improved, and the service life of the box body can be effectively prolonged;
a bottom plate 40 is arranged at one end of the helical gear 20 far away from the straight internal thread part 11, a motor abdicating hole 41 is arranged in the bottom plate 40 and used for abdicating the output end of the motor so as to ensure that the output end of the motor can be smoothly connected with the motor helical gear 34, a clamping groove 42 is arranged at one end of the bottom plate 40 close to the helical gear 20, a clamping lug 21 is clamped in the clamping groove 42, a screw hole 43 is arranged on the bottom plate 40, and a screw 44 penetrates through the limiting hole 121 and is in threaded connection with the screw hole 43;
a circular plate-shaped second planet carrier 50 is arranged in the straight internal gear portion 11, one surface, close to the helical internal gear 20, of the second planet carrier 50 is fixedly provided with m second input shafts 51, m is an integer greater than 2, preferably, m is 3 or 4, all the second input shafts 51 are rotationally symmetrical about the circle center of the second planet carrier 50, a second output end 52 is arranged at the circle center of the other surface of the second planet carrier 50, namely, the second output end 52 is positioned on one side, away from the helical internal gear 20, of the second planet carrier 50, each second input shaft 51 is sleeved with a straight gear 53, all the straight gears 53 are meshed with the straight internal gear portion 11, a sun straight gear 54 is meshed between all the straight gears 53, the sun straight gear 54 is fixedly connected with the first output end 32, and an output shaft 55 is fixedly connected with the second output end 52;
a cover plate 60 is arranged at one end of the second planet carrier 50 far away from the first planet carrier 30, the cover plate 60 is sleeved outside the output shaft 55, the cover plate 60 is connected to one end of the box body 10, and a bearing is integrally formed in the cover plate 60.
The inclined inner gear 20 is sleeved in the smooth inserting part 12 of the box body 10, the inclined inner gear 20 and the straight inner thread part 11 can be processed separately, the processing difficulty can be effectively reduced, the processing precision can be ensured, the inclined inner gear 20 is tightly attached to the smooth inserting part 12, the concentricity between the straight inner thread part 11 and the inclined inner gear 20 can be effectively ensured, the assembling precision is high, the performance is good, and the working structure is stable; in addition, the inclined inner gear 20 is connected with the bottom plate 40 in a clamping manner through the clamping convex blocks 21 and the clamping grooves 42, so that the torque borne by the inclined inner gear 20 can be effectively transmitted, the structural stability is further improved, the bottom plate 40 is stably fixed in the box body 10 through the screws 44, and the whole structure is firm and reliable; in addition, the planetary bevel gears 33 and the helical internal gear 20 are compactly engaged with each other, and vibration and noise generated during operation can be effectively reduced.
The utility model discloses a core effect is: the bevel internal gear 20 and/or the planetary bevel gear 33 which are arranged as plastic parts are matched to form a transmission structure, so that the noise and vibration generated when the gearbox works can be effectively reduced. The utility model discloses a predominant use is: the method is applied to the medical fields of dental handpieces, dental care, radiotherapy instruments, precision instruments, medical equipment and the like.
In this embodiment, the number of the limiting holes 121 is p, p is an integer greater than 2, the number of the screw holes 43 is p, and the bottom plate 40 and the box body 10 are fixedly connected through at least 3 screws 44, so that the firmness of the connecting structure between the two can be effectively improved.
In this embodiment, the screens lug 21 is equipped with q, and q is for being greater than 1 integer, and screens recess 42 also is equipped with q, through at least two screens lugs 21 cooperation screens recess 42, can effectively improve the fastness of screens connection structure between bottom plate 40 and oblique internal gear 20 to effectively improve during operation connection structure's stability.
In the present embodiment, the annular first spacer 45 is provided between the planetary helical gear 33 and the bottom plate 40, and the first spacer 45 can effectively improve the stability of the position of the planetary helical gear 33 and improve the service life.
Based on the above embodiment, the annular second gasket 56 is provided between the sun spur gear 54 and the first carrier 30, and the second gasket 56 can effectively improve the structural stability between the sun spur gear 54 and the first carrier 30, and prolong the service life.
Based on above-mentioned embodiment, be equipped with annular third gasket 61 between second planet carrier 50 and the apron 60, third gasket 61 cover is established outside output shaft 55, can effectively improve the stability of structure between apron 60 and the second planet carrier 50 through third gasket 61, improves life.
Based on the above embodiment, the cover plate 60 is provided with the fixing sleeve 62 at a side away from the case 10, and the fixing sleeve 62 is used for limiting the position of the output shaft 55, thereby improving the stability of the whole structure.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (7)
1. The utility model provides a dental handpiece's oblique plastic gear case structure, its characterized in that includes box (10), box (10) are including integrated into one piece's straight internal tooth thread portion (11) and smooth joint portion (12), be equipped with oblique internal gear (20) in smooth joint portion (12), the inner radius of smooth joint portion (12) is R, the outer radius of oblique internal gear (20) is R, R ═ R, be equipped with spacing hole (121) on smooth joint portion (12), the one end integrated into one piece that the straight internal tooth thread portion (11) was kept away from to oblique internal gear (20) has screens lug (21);
a first planet carrier (30) is arranged in the helical internal gear (20), n first input shafts (31) are fixed on one surface, away from the straight internal thread portion (11), of the first planet carrier (30), n is an integer greater than 2, all the first input shafts (31) are rotationally symmetrical about the circle center of the first planet carrier (30), a first output end (32) is arranged at the circle center of the other surface of the first planet carrier (30), each first input shaft (31) is sleeved with a planetary helical gear (33), the planetary helical gears (33) are in meshed connection with the helical internal gear (20), helical gears (34) are in meshed connection between all the planetary helical gears (33), and the helical internal gear (20) and/or the planetary helical gears (33) are plastic parts;
one end, far away from the straight inner thread part (11), of the inclined inner gear (20) is provided with a bottom plate (40), a motor abdicating hole (41) is formed in the bottom plate (40), one end, close to the inclined inner gear (20), of the bottom plate (40) is provided with a clamping groove (42), the clamping projection (21) is in clamping connection with the clamping groove (42), a screw hole (43) is formed in the bottom plate (40), and a screw (44) penetrates through the limiting hole (121) and is in threaded connection with the screw hole (43);
a second planet carrier (50) is arranged in the straight internal thread part (11), m second input shafts (51) are fixed on one surface, close to the oblique internal gear (20), of the second planet carrier (50), m is an integer larger than 2, all the second input shafts (51) are rotationally symmetrical about the circle center of the second planet carrier (50), a second output end (52) is arranged at the circle center of the other surface of the second planet carrier (50), a straight planet gear (53) is sleeved on each second input shaft (51), the straight planetary gears (53) are meshed with the straight internal thread parts (11), all the straight planetary gears (53) are meshed with a straight sun gear (54), the sun straight gear (54) is fixedly connected with the first output end (32), and the second output end (52) is fixedly connected with an output shaft (55);
and a cover plate (60) is arranged at one end, far away from the first planet carrier (30), of the second planet carrier (50), and the cover plate (60) is sleeved outside the output shaft (55).
2. The bevel plastic gearbox structure for dental handpiece according to claim 1, wherein the number of the limiting holes (121) is p, p is an integer greater than 2, and the number of the screw holes (43) is p.
3. The bevel plastic gearbox structure for dental handpiece according to claim 1, wherein the number of the locking projections (21) is q, q is an integer greater than 1, and the number of the locking grooves (42) is q.
4. The bevel gear box structure for dental handpiece according to claim 1, wherein an annular first spacer (45) is provided between the planetary bevel gear (33) and the base plate (40).
5. The oblique plastic gearbox structure for dental handpiece according to claim 4, wherein a second washer (56) having a circular ring shape is provided between the sun spur gear (54) and the first carrier (30).
6. The bevel plastic gearbox structure for dental handpiece according to claim 5, wherein an annular third gasket (61) is disposed between the second planet carrier (50) and the cover plate (60), and the third gasket (61) is sleeved on the output shaft (55).
7. The bevel plastic gearbox structure for dental handpiece according to claim 6, wherein the cover plate (60) is provided with a fixing sleeve (62) at a side thereof remote from the housing (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020903163.1U CN212297514U (en) | 2020-05-25 | 2020-05-25 | Inclined plastic gear box structure of dental handpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020903163.1U CN212297514U (en) | 2020-05-25 | 2020-05-25 | Inclined plastic gear box structure of dental handpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212297514U true CN212297514U (en) | 2021-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020903163.1U Active CN212297514U (en) | 2020-05-25 | 2020-05-25 | Inclined plastic gear box structure of dental handpiece |
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| Country | Link |
|---|---|
| CN (1) | CN212297514U (en) |
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2020
- 2020-05-25 CN CN202020903163.1U patent/CN212297514U/en active Active
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