CN212085992U

CN212085992U - Pneumatic speed reducing motor for dental handpiece

Info

Publication number: CN212085992U
Application number: CN202020350376.6U
Authority: CN
Inventors: 岳波; 朱卫国; 孙祖录
Original assignee: SUZHOU PAC-DENT TECHNOLOGY CO LTD
Current assignee: SUZHOU PAC-DENT TECHNOLOGY CO LTD
Priority date: 2020-03-19
Filing date: 2020-03-19
Publication date: 2020-12-04
Anticipated expiration: 2030-03-19

Abstract

A pneumatic reducing motor for a dental handpiece comprises a pneumatic motor and a planetary reducing gear set; the pneumatic motor comprises an air inlet, an air outlet, a stator structure and a pneumatic rotor; an eccentric through hole is formed in the stator structure, and the eccentric through hole is communicated with the air inlet and the air outlet to form an air flow channel; the pneumatic rotor is rotatably arranged in the eccentric through hole and is driven to rotate by high-pressure airflow in the gas flow channel. The planetary reduction gear set comprises an output shaft, an outer gear ring, a sun gear and a planet gear; each planet wheel is meshed with the sun wheel in the circumferential direction; the inner ring of the outer gear ring is meshed with each planet wheel; the output shaft is fixed on the axis of the outer gear ring and is in transmission connection with the machine head; the rotating shaft of the sun gear is positioned on the axis of the outer gear ring and is in transmission connection with the rotating shaft of the pneumatic rotor. The utility model discloses realize that the rotational speed is 2000~5000 rpm's low-speed polishing, guarantee that output torque is greater than 15mN.m, improve patient's treatment when guaranteeing treatment effect and experience the sense, avoid injuring patient's gum.

Description

Pneumatic speed reducing motor for dental handpiece

Technical Field

The utility model relates to a dental treatment apparatus field, concretely relates to pneumatic gear motor for dental handpiece.

Background

The tooth polishing machine is mainly applied to the prevention and treatment of dental diseases and the cleaning and polishing of tooth surfaces (matched with special polishing paste). It is mainly composed of two parts of a tooth protecting corner piece (Prophy Angle) and a hand-held power part (dental handpiece).

After scaling or other treatment of the gums of the teeth, the surfaces are rough or scratched, prone to deposit tartar and accumulate plaque, and must be polished. The existing pneumatic motor in the market has the rotating speed of 15000-20000 rpm (air pressure of about 30 psi), belongs to high rotating speed, is easy to cause discomfort or pain of patients, and is easy to damage gum. If the rotation speed is reduced by reducing the air pressure, the output torque is reduced sharply, and the treatment requirement of tooth surface polishing is difficult to achieve. If an electric motor is used, its size is generally large, and some of them are connected to the controller portion by wires, resulting in inconvenience in operation and use.

Therefore, how to solve the above-mentioned deficiencies of the prior art is a problem to be solved by the present invention.

Disclosure of Invention

The utility model aims at providing a dental handpiece uses pneumatic gear motor.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

a kind of dental hand-set uses the pneumatic deceleration motor, including locating the pneumatic motor and planetary reduction gear set in the shell of the said hand-set;

the pneumatic motor comprises an air inlet, an air outlet, a stator structure and a pneumatic rotor; the stator structure is fixed relative to the mobile phone shell, an eccentric through hole is formed in the stator structure along the length direction of the mobile phone, and the eccentric through hole is communicated with the air inlet and the air outlet to form an air flow channel; the pneumatic rotor is rotationally arranged in the eccentric through hole and is driven to rotate by high-pressure airflow in the gas flow channel, and the rotating shaft of the pneumatic rotor is arranged along the length direction of the mobile phone and is positioned at the radial center of the mobile phone;

the planetary reduction gear set comprises an output shaft, an outer gear ring, a sun gear and at least three planet gears; the sun wheel is positioned at the radial center of the planetary reduction gear set, and the planetary wheels are uniformly distributed on the periphery of the sun wheel in the circumferential direction and are meshed with the sun wheel; the sun gear and the planet gears are positioned in the outer gear ring, and the inner ring of the outer gear ring is meshed with the planet gears; the output shaft is positioned on the axis of the outer gear ring, is fixed relative to the outer gear ring and is in transmission connection with a handpiece of the dental handpiece; and the rotating shaft of the sun gear is positioned on the axis of the outer gear ring and is in transmission connection with the rotating shaft of the pneumatic rotor.

The relevant content in the above technical solution is explained as follows:

1. in the scheme, the rotating speed of an output shaft of the planetary reduction gear set is 2000-5000 rpm, and the output torque is more than 15 mN.m.

2. In the scheme, the reduction ratio of the planetary reduction gear set is 2: 1-20: 1, and the output torque is larger than 15 mN.m.

The utility model discloses a theory of operation and advantage as follows:

the utility model relates to a pneumatic reducing motor for a dental handpiece, which comprises a pneumatic motor and a planetary reducing gear set; the pneumatic motor comprises an air inlet, an air outlet, a stator structure and a pneumatic rotor; an eccentric through hole is formed in the stator structure, and the eccentric through hole is communicated with the air inlet and the air outlet to form an air flow channel; the pneumatic rotor is rotatably arranged in the eccentric through hole and is driven to rotate by high-pressure airflow in the gas flow channel. The planetary reduction gear set comprises an output shaft, an outer gear ring, a sun gear and a planet gear; each planet wheel is meshed with the sun wheel in the circumferential direction; the inner ring of the outer gear ring is meshed with each planet wheel; the output shaft is fixed on the axis of the outer gear ring and is in transmission connection with the handpiece of the dental handpiece; the rotating shaft of the sun gear is positioned on the axis of the outer gear ring and is in transmission connection with the rotating shaft of the pneumatic rotor.

Compared with the prior art, the utility model discloses compact can realize that the rotational speed is 2000~5000 rpm's low-speed polishing to guarantee that output torque is greater than 15mN.m, can improve patient's treatment when guaranteeing treatment effect and experience the sense, avoid injuring patient's gum.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention;

FIG. 2 is an exploded perspective view of an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of an air motor according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a planetary reduction gear set in accordance with an embodiment of the present invention.

In the above drawings: 1. a handset housing; 2. a pneumatic motor; 3. a planetary reduction gear set; 4. a stator structure; 5. an output shaft; 6. an outer ring gear; 7. a sun gear; 8. a planet wheel; 9. a machine head; 10. an air inlet; 11. an air outlet; 12. a pneumatic rotor; 13. an eccentric through hole; 14. and rotating the shaft.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

example (b): the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure may be shown and described, and which, when modified and varied by the techniques taught herein, can be made by those skilled in the art without departing from the spirit and scope of the disclosure.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms "a", "an", "the" and "the", as used herein, also include the plural forms.

As used herein, "connected" or "positioned" refers to two or more elements or devices being in direct physical contact with each other or in indirect physical contact with each other, and may also refer to two or more elements or devices being in operation or acting on each other.

As used herein, the terms "comprising," "including," "having," and the like are open-ended terms that mean including, but not limited to.

As used herein, the term (terms), unless otherwise indicated, shall generally have the ordinary meaning as commonly understood by one of ordinary skill in the art, in this written description and in the claims. Certain words used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the disclosure.

Referring to fig. 1 to 4, an air motor for a dental handpiece includes an air motor 2 and a planetary reduction gear set 3 disposed in a handpiece housing 1.

The pneumatic motor 2 comprises an air inlet 10, an air outlet 11, a stator structure 4 and a pneumatic rotor 12; the stator structure 4 is fixed relative to the mobile phone shell 1, an eccentric through hole 13 is formed in the stator structure 4 along the length direction of the mobile phone, and the eccentric through hole 13 is communicated with the air inlet 10 and the air outlet 11 to form an air flow channel; the pneumatic rotor 12 is rotatably arranged in the eccentric through hole 13 and is driven to rotate by high-pressure airflow in the gas flow channel, and the rotating shaft 14 of the pneumatic rotor 12 is arranged along the length direction of the mobile phone and is positioned at the radial center of the mobile phone. Through the design of the eccentric through hole 13 in the stator structure 4, after the gas is introduced, the gas pressure difference can be generated on the blades of the pneumatic rotor 12, so that the pneumatic rotor 12 is driven to rotate, and the pneumatic rotor 12 cannot rotate if concentric.

The planetary reduction gear set 3 comprises an output shaft 5, an outer gear ring 6, a sun gear 7 and at least three planet gears 8; the sun gear 7 is positioned at the radial center of the planetary reduction gear set 3, and the planet gears 8 are uniformly distributed on the periphery of the sun gear 7 in the circumferential direction and are meshed with the sun gear 7; the sun gear 7 and the planet gears 8 are positioned in the outer gear ring 6, and the inner ring of the outer gear ring 6 is meshed with the planet gears 8; the output shaft 5 is positioned on the axis of the outer gear ring 6 and is fixed relative to the outer gear ring 6, the output shaft 5 is in transmission connection with a handpiece 9 of the dental handpiece, and the handpiece 9 is used for transmission connection with a tooth protecting bend (namely, a treatment head); the rotating shaft of the sun gear 7 is positioned on the axis of the outer gear ring 6 and is in transmission connection with the rotating shaft 14 of the pneumatic rotor 12.

The rotating speed of an output shaft 5 of the planetary reduction gear set 3 is 2000-5000 rpm, or the reduction ratio of the planetary reduction gear set 3 is 2: 1-20: 1, so that the output torque is controlled to be larger than 15 mN.m.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A kind of dental handpiece uses the air deceleration motor, characterized by that:

the device comprises a pneumatic motor and a planetary reduction gear set which are arranged in a mobile phone shell;

2. The pneumatic deceleration motor for dental handpiece according to claim 1, characterized in that: the speed of an output shaft of the planetary reduction gear set is 2000-5000 rpm, and the output torque is larger than 15 mN.m.

3. The pneumatic deceleration motor for dental handpiece according to claim 1, characterized in that: the reduction ratio of the planetary reduction gear set is 2: 1-20: 1, and the output torque is larger than 15 mN.m.