CN215059213U - Speed-increasing dental hand bender - Google Patents
Speed-increasing dental hand bender Download PDFInfo
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- CN215059213U CN215059213U CN202120401664.4U CN202120401664U CN215059213U CN 215059213 U CN215059213 U CN 215059213U CN 202120401664 U CN202120401664 U CN 202120401664U CN 215059213 U CN215059213 U CN 215059213U
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Abstract
The utility model relates to an acceleration rate dental hand bender, which comprises a housin, the inboard at casing rear portion is equipped with accelerator, accelerator includes input, play axle, through parallel shaft gear drive cooperation between input, the play axle, the rear end of input shaft is used for connecting the motor output shaft, the inboard of casing neck is equipped with the transmission shaft that is located the place ahead of output shaft, cooperate through the transmission of intersecting shaft gear drive between the rear end of transmission shaft and the front end of output shaft, or connect through flexible coupling, the transmission ratio of intersecting shaft gear drive is close to or equals 1; the utility model discloses a gear train noise of dental hand bender is little and long service life.
Description
Technical Field
The utility model relates to an oral medical equipment technical field, concretely relates to acceleration rate dental handpiece.
Background
The dental bender is used for the root canal therapy operation, and common acceleration rate dental bender includes casing 1 on the market, the inboard of 1 rear portion 10 of casing is equipped with speed increase gear 12, speed increase gear 12 is including input, play axle 13, 14, the front end of input shaft 13 is equipped with dish tooth 20, the rear end of output shaft 14 is equipped with and meshes driven cylinder helical gear 21 with dish tooth 20, the rear end of input shaft 13 is used for connecting the motor output shaft, the inboard of 1 head 8 of casing is equipped with the rotatory chuck 19 that is located the place ahead of output shaft 14, rotatory chuck 19 is the column and supports rotatoryly through the bearing, rotatory chuck 19 passes through 90 crossing bevel gear drive cooperation with the front end of output shaft 14, the bottom of rotatory chuck 19 is used for the centre gripping working head.
The common speed-increasing dental elbow machine on the market has the following problems: the disc teeth 20 and the cylindrical helical gears 21 are in meshing transmission to form crossed angle disc tooth transmission, the structural design of the crossed angle disc tooth transmission is constrained by the inner space of the shell, the number of the disc teeth 20 is greater than that of the cylindrical helical gears 21 to realize speed-up transmission, and the thickness of the disc teeth 20 with multiple teeth is thinner, so that the phenomenon of tooth breakage is easily caused when the disc teeth 20 are subjected to a large load; the disc teeth 20 are generally processed by a profiling method, the gear precision of the processed disc teeth is not high, and the disc teeth 20 and the cylindrical helical gear 21 have large relative sliding between the working surfaces due to a large speed increasing ratio in the high-speed transmission process, so that the gear is easy to wear, the transmission noise is increased, and the service life of the gear is low.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an acceleration rate dental handpiece, this acceleration rate dental handpiece's train noise of operation is little and long service life.
For solving the technical problem, the utility model provides a pair of acceleration rate dental hand bender, which comprises a housin, the inboard at casing rear portion is equipped with accelerator, accelerator includes input, play axle, through parallel shaft gear drive cooperation between input, the play axle, the rear end of input shaft is used for connecting the motor output shaft, the inboard of casing neck is equipped with the transmission shaft that is located the place ahead of output shaft, through the cooperation of looks transaxle gear drive between the rear end of transmission shaft and the front end of output shaft, or through flexible coupling connection, the transmission ratio of crossing shaft gear drive is close or equals 1.
Further, the parallel shaft gear transmission is parallel shaft cylindrical straight gear transmission; the spur gear can be processed by a generating method, the processed gear has high precision, low cost and low noise during transmission, the tooth thickness of the spur gear is relatively thick, and the phenomenon of tooth breakage is not easy to generate when the load is large.
Further, the parallel shaft gear transmission is a planetary gear transmission.
Further, a cylindrical straight gear is sleeved on the input shaft, the output shaft is a cylindrical straight gear shaft, and the cylindrical straight gear is in meshing transmission with the cylindrical straight gear shaft; the cylindrical straight gear and the cylindrical straight gear shaft can be processed by a generating method, the processed gear has high precision and low cost, the noise is low during transmission, the tooth thickness of the cylindrical straight gear and the cylindrical straight gear shaft is relatively thick, and the phenomenon of tooth breakage is not easy to generate when the load is large.
Further, the intersecting axis gear drive is an intersecting cylindrical helical gear drive.
Furthermore, a first cylindrical helical gear is arranged at the rear end of the transmission shaft, and a second cylindrical helical gear in meshing transmission with the first cylindrical helical gear is arranged at the front end of the output shaft; the first cylindrical helical gear and the second cylindrical helical gear are in meshing transmission to form intersecting cylindrical helical gear transmission, and the transmission ratio of the intersecting shaft gear transmission is close to or equal to 1, so that a speed increasing ratio or a speed reducing ratio hardly exists between the first cylindrical helical gear and the second cylindrical helical gear, the relative sliding between working surfaces of the two gears is small, the tooth surface abrasion is less, and the noise is low; because there is almost no speed increasing ratio or speed reducing ratio between the first cylindrical helical gear and the second cylindrical helical gear, the number of teeth of the two gears can be designed to be less, and the tooth thickness and the tooth width can be designed to be thicker, so that the strength of the gears is improved, and the phenomenon of tooth breakage in the transmission process is effectively avoided.
Further, a rotary chuck located in front of the transmission shaft is arranged on the inner side of the head of the shell, the rotary chuck is columnar and supported to rotate through a bearing, the rotary chuck is in transmission fit with the front end of the transmission shaft through 90-degree crossed bevel gears or crown gears, and the bottom end of the rotary chuck is used for clamping the working head.
Further, the flexible coupling is a universal joint cross coupling.
Further, the input shaft, the output shaft and the transmission shaft are supported for rotation by bearings.
The utility model has the advantages that: all the gears forming the parallel shaft gear transmission can be processed by adopting a generating method, the processed gears are high in precision and low in cost, the noise is low during transmission, and the tooth thickness of each gear is not restricted by the internal space of the shell, so that the tooth thickness of each gear can be designed to be thicker to improve the gear strength, and the high-strength gears are not easy to generate the tooth breakage phenomenon when being subjected to a large load; the transmission ratio of the transmission of the intersecting shaft gear is close to or equal to 1, so that a speed increasing ratio or a speed reducing ratio hardly exists between the driving gear and the driven gear which form the transmission of the intersecting shaft gear, and the relative sliding between the working surfaces of the driving gear and the driven gear is small, the tooth surface abrasion is less, and the noise is low; because the transmission ratio of the intersecting shaft gear transmission is close to or equal to 1, the number of teeth of a driving gear and a driven gear which form the intersecting shaft gear transmission can be designed to be less, the tooth thickness and the tooth width can be designed to be thicker, so that the gear strength is improved, and the tooth breakage phenomenon is not easy to occur in the transmission process; therefore, the gear train of the speed-increasing dental hand bender has low working noise and long service life.
Drawings
In order to clarify the explanation of the innovative principles of the present invention and its technical advantages compared with the prior art curved handsets, a possible embodiment is illustrated below by way of non-limiting example applying said principles, with the aid of the annexed drawings. In the figure:
fig. 1 is a schematic view of an accelerating dental handpiece according to an embodiment of the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a front view of the housing;
fig. 4 is a schematic view of a commercially available speed-increasing dental bender.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
Example 1
As shown in fig. 1-3, an acceleration rate dental handpiece includes a housing 1, the inboard at casing 1 rear portion 10 is equipped with accelerator 2, accelerator 2 includes input, play axle 3, 4, through parallel shaft gear drive cooperation between input, play axle 3, 4, the rear end of input shaft 3 is used for connecting the motor output shaft, the inboard of casing 1 neck 5 is equipped with the transmission shaft 6 that is located the place ahead of output shaft 4, through crossing shaft gear drive cooperation between the rear end of transmission shaft 6 and the front end of output shaft 4, or through flexible coupling connection, crossing shaft gear drive's drive ratio is close to or equals 1.
Preferably, the parallel shaft gear transmission is a parallel shaft spur gear transmission; the parallel shaft gear transmission is also parallel shaft herringbone gear transmission, planetary gear transmission or parallel shaft helical gear transmission.
The input shaft 3 is sleeved with a cylindrical straight gear 7, the output shaft 4 is a cylindrical straight gear shaft, and the cylindrical straight gear 7 is in meshing transmission with the cylindrical straight gear shaft.
Preferably, the intersecting axis gear drive is an intersecting cylindrical helical gear drive; the intersecting shaft gear transmission can also be an intersecting straight bevel gear transmission, an intersecting helical bevel gear transmission or an intersecting curved bevel gear transmission.
Preferably, the rear end of the transmission shaft 6 is provided with a first cylindrical helical gear 30, and the front end of the output shaft 4 is provided with a second cylindrical helical gear 31 which is engaged with the first cylindrical helical gear 30 for transmission.
The inside of the head 8 of the shell 1 is provided with a rotary chuck 9 positioned in front of the transmission shaft 6, the rotary chuck 9 is columnar and is supported by a bearing to rotate, the front ends of the rotary chuck 9 and the transmission shaft 6 are in transmission fit through 90-degree crossed bevel gears or crown gears, and the bottom end of the rotary chuck 9 is used for clamping a working head.
The flexible coupling is a cross-axle type universal coupling; the flexible coupling can also be a crowned tooth coupling, an Oldham coupling, an elastomeric pin coupling, or an elastomeric sleeve pin coupling.
The input and output shafts 3, 4 and the transmission shaft 6 are supported for rotation by bearings.
The profiling method is a processing method for directly cutting off tooth grooves on a machine tool to process tooth profiles by utilizing a forming cutter with the same tooth profile curve, a disc-shaped or finger-shaped milling cutter is usually used on a common milling machine, a dividing head is used for processing, the tooth milling is processed tooth by tooth, after one tooth groove is milled, the dividing head needs to be rotated to rotate a tooth blank by one tooth, the production efficiency is low, the accumulated error of division is large, the precision of the processed gear is not high, and therefore, the tooth milling processing is mainly used for single-piece repairing and matching.
The generating method is a method for processing a gear by using the meshing principle of the gear, and common processing methods include hobbing, gear shaping, gear shaving, gear honing, gear grinding and the like. The gear hob is a rack-shaped cutter, the shape of the tooth profile of the shaft plane of the gear hob is the same as that of the rack, the gear hob and the processed tooth blank are in meshing transmission of the gear and the rack, and the hob is fed along the axial direction of the tooth blank, so that the tooth profile is cut. The generating method for processing the gear by the gear hobbing machine has high gear processing precision and production efficiency, and is mainly used for batch and mass production.
All the gears forming the parallel shaft gear transmission can be processed by adopting a generating method, the processed gears are high in precision and low in cost, the noise is low during transmission, and the tooth thickness of each gear is not restricted by the internal space of the shell, so that the tooth thickness of each gear can be designed to be thicker to improve the gear strength, and the high-strength gears are not easy to generate the tooth breakage phenomenon when being subjected to a large load; the transmission ratio of the transmission of the intersecting shaft gear is close to or equal to 1, so that a speed increasing ratio or a speed reducing ratio hardly exists between the driving gear and the driven gear which form the transmission of the intersecting shaft gear, and the relative sliding between the working surfaces of the driving gear and the driven gear is small, the tooth surface abrasion is less, and the noise is low; because the transmission ratio of the intersecting shaft gear transmission is close to or equal to 1, the number of teeth of a driving gear and a driven gear which form the intersecting shaft gear transmission can be designed to be less, the tooth thickness and the tooth width can be designed to be thicker, so that the gear strength is improved, and the tooth breakage phenomenon is not easy to occur in the transmission process; therefore, the gear train of the speed-increasing dental hand bender has low working noise and long service life.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides an acceleration rate dental handpiece, includes casing (1), its characterized in that: the inboard of casing (1) rear portion (10) is equipped with speed increase gear (2), speed increase gear (2) include input shaft (3), output shaft (4), through parallel shaft gear drive cooperation between input shaft (3), output shaft (4), the rear end of input shaft (3) is used for connecting the motor output shaft, the inboard of casing (1) neck (5) is equipped with transmission shaft (6) that are located the place ahead of output shaft (4), through intersecting shaft gear drive cooperation between the rear end of transmission shaft (6) and the front end of output shaft (4), or through flexible coupling connection, intersecting shaft gear drive's drive ratio is close to or equals 1.
2. The speed increasing dental bender according to claim 1, wherein: the parallel shaft gear transmission is parallel shaft cylindrical straight gear transmission.
3. The speed increasing dental bender according to claim 1, wherein: the parallel shaft gear transmission is a planetary gear transmission.
4. The speed increasing dental bender according to claim 1, wherein: the cylindrical straight gear (7) is sleeved on the input shaft (3), the output shaft (4) is a cylindrical straight gear shaft, and the cylindrical straight gear (7) is in meshing transmission with the cylindrical straight gear shaft.
5. The speed increasing dental bender according to claim 1, wherein: the intersecting axis gear drive is an intersecting cylindrical helical gear drive.
6. The speed increasing dental bender according to claim 1, wherein: the rear end of the transmission shaft (6) is provided with a first cylindrical helical gear (30), and the front end of the output shaft (4) is provided with a second cylindrical helical gear (31) which is in meshing transmission with the first cylindrical helical gear (30).
7. The speed increasing dental bender according to claim 1, wherein: the inside of casing (1) head (8) is equipped with rotatory chuck (9) that are located the place ahead of transmission shaft (6), rotatory chuck (9) are the column and support rotatoryly through the bearing, rotatory chuck (9) and the front end of transmission shaft (6) are through the transmission cooperation of 90 crossing bevel gears or crown gear transmission cooperation, the bottom of rotatory chuck (9) is used for the centre gripping work head.
8. The speed increasing dental bender according to claim 1, wherein: the flexible coupling is a cross-pin universal coupling.
9. A speed increasing dental bender according to any of claims 1 to 8, wherein: the input shaft (3), the output shaft (4) and the transmission shaft (6) are supported by bearings to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120401664.4U CN215059213U (en) | 2021-02-23 | 2021-02-23 | Speed-increasing dental hand bender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120401664.4U CN215059213U (en) | 2021-02-23 | 2021-02-23 | Speed-increasing dental hand bender |
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| Publication Number | Publication Date |
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| CN215059213U true CN215059213U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120401664.4U Active CN215059213U (en) | 2021-02-23 | 2021-02-23 | Speed-increasing dental hand bender |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007280A (en) * | 2021-02-23 | 2021-06-22 | 常州赛乐医疗技术有限公司 | Speed-increasing dental hand bender |
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2021
- 2021-02-23 CN CN202120401664.4U patent/CN215059213U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007280A (en) * | 2021-02-23 | 2021-06-22 | 常州赛乐医疗技术有限公司 | Speed-increasing dental hand bender |
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