Motor resistant to high-temperature steam sterilization

Abstract

The utility model provides a motor resistant to high-temperature steam sterilization, which belongs to the technical field of motors and comprises a shell. The rear end cover is concentrically arranged in one end of the shell; the sealing cover is arranged outside the rear end cover; the sealing cover and the glue groove in the shell are filled with glue. One end of the coupling is fixed at the other end of the shell; and the disinfection sealing piece is connected with the coupling in a sealing manner. The motor further comprises a stator assembly which is installed on the shell in a limited mode through a supporting arc, and the stator assembly, the supporting arc and the shell are integrally encapsulated through epoxy glue. According to the utility model, the glue is filled in the glue grooves on the sealing cover and the shell, and the coupling is sealed at the other end of the shell by using the disinfection sealing element, so that the integral sealing performance is good, and high-temperature steam disinfection is resistant. And meanwhile, the shell and the stator assembly are integrally encapsulated by epoxy glue, so that an overhead glue layer can be formed between the heating component and the shell, and the low hand feeling temperature can be ensured in the use process.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly to a motor resistant to high-temperature steam sterilization. Background Art

[0002] Dental motors are key components that are held by operators during surgical procedures to complete surgical tasks. Before surgery, dental motors must also be sterilized to meet the disinfection standards of medical devices. Therefore, dental motors also need to have the ability to withstand high-temperature steam sterilization.

[0003] In addition, dental motors are mainly used to drill holes in the jawbone and fix implants in place. Therefore, dental motors are usually required to have a high output torque. At the same time, since the motor is used handheld, it is also required that the dental motor does not generate excessive temperature during operation.

[0004] However, such motors on the market currently usually install standard motors inside the dental handpiece housing. Such a design not only has a relatively complex production process, the product is relatively bulky, but also often fails to meet the sealing requirements for high-temperature steam disinfection. At the same time, it is difficult to optimize the design within the limited diameter range, resulting in relatively high temperatures during use, which affects the use by operators. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the defects of the prior art and provide a motor resistant to high-temperature steam sterilization.

[0006] To achieve the above and other purposes, the utility model is realized by including the following technical solutions: The utility model provides a motor resistant to high-temperature steam sterilization, including a housing; a rear end cover concentrically installed inside one end of the housing; a sealing cover disposed outside the rear end cover; the glue grooves on the sealing cover and the housing are filled with glue; a coupling, one end of which is fixed to the other end of the housing; and a disinfection seal, which is sealingly connected to the coupling.

[0007] In one embodiment, the sealing cover is provided with a through hole for passing a pin, and the gap between the sealing cover and the pin is filled with glue.

[0008] In one embodiment, a sealing gasket is provided between the housing and the coupling.

[0009] In one embodiment, the other end of the coupling is provided with an internal thread, and the disinfection seal is provided with an external thread, and the coupling is threadedly connected to the disinfection seal.

[0010] In one embodiment, the disinfection seal is provided with an annular groove, and an O-ring is disposed in the annular groove.

[0011] In one embodiment, the motor further includes a stator assembly, which is installed on the housing by being limited by a support arc, and the stator assembly, the support arc and the housing are integrally potted with epoxy glue.

[0012] In one embodiment, the motor further includes a flexible wire assembly, and the flexible assembly includes a flexible circuit board and an LED lamp; the flexible circuit board is installed between the housing and the stator assembly, with one end fixed on the PCB board; the other end is fixedly connected to the LED lamp.

[0013] In one embodiment, the PCB board is arranged between the rear end cover and the sealing cover, and the pin and the three-phase lead-out wires of the stator assembly are welded thereon.

[0014] In one embodiment, an insulating gasket is arranged between the three-phase lead-out wires of the stator assembly and the rear end cover.

[0015] In one embodiment, the motor further includes a rotor assembly, and the rotor assembly includes a shaft, a main magnet, a sub-magnet and a bearing; the shaft is rotatably installed in the housing through the bearing; the main magnet is sleeved on the shaft and is located between the two bearings; the sub-magnet is installed in the first end of the shaft, and the first end of the shaft is arranged in the rear end cover; a steel gasket is further arranged between the bearing and the main magnet.

[0016] In one embodiment, a spring is arranged between the bearing and the rear end cover.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. By filling glue in the glue grooves on the sealing cover and the housing, and sealing the coupling with a disinfection seal at the other end of the housing, the overall sealing performance of the present utility model is good, and it can withstand high-temperature steam disinfection;

[0019] 2. The stator assembly of the present utility model is installed on the housing by being limited by a support arc, and the stator assembly, the support arc and the housing are integrally potted with epoxy glue, which can form an air-filled glue layer between the heat-generating components (stator core, coil, etc.) of the motor and the machine shell, so that the hand feeling temperature can be guaranteed to be low during use;

[0020] 3. The whole machine of the present utility model has good temperature rise performance and high short-time output torque of the motor. Description of the Drawings

[0021] Figure 1 Shown is a first sectional view (with epoxy glue) of a motor for high-temperature steam sterilization according to the present utility model.

[0022] Figure 2Shown is a first cross-sectional schematic diagram of a motor for high-temperature steam sterilization according to the present utility model (without epoxy glue).

[0023] Figure 3 Shown is a second cross-sectional schematic diagram of a motor for high-temperature steam sterilization according to the present utility model.

[0024] Figure 4 Shown as Figure 3 an enlarged view of part A in

[0025] Figure 5 Shown is a structural schematic diagram of a disinfection seal in the present utility model. Specific embodiments

[0026] Please refer to Figures 1 - 5 . The following specific examples illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0027] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have any technical substance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.

[0028] Unless otherwise defined, the technical terms or scientific terms used herein should be understood in the general sense by those of ordinary skill in the field to which the present utility model belongs. The terms "a", "one", or "the" and the like used in the present utility model do not indicate a quantity limitation either, but only indicate the existence of at least one. The terms "including" or "comprising" and the like mean that the elements or objects appearing before the term cover the elements or objects listed after the term and their equivalents, without excluding other elements or objects. The serial numbers assigned to the components in this specification itself, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. And the "connection" mentioned in the present invention, unless otherwise specified, includes both direct and indirect connections.

[0029] In order to avoid confusion with the present utility model, some well-known technical features in the art are not described.

[0030] Such as Figures 1 - 3As shown in the figure, this embodiment provides a motor resistant to high-temperature steam sterilization, which includes a housing assembly 10, and a rotor assembly 20, a stator assembly 30, and a flexible wire assembly 40 that are concentrically installed in the housing assembly 10; the rotor assembly 20 is rotatably installed at the center of the housing assembly 10; the stator assembly 30 is arranged outside the rotor assembly 20; the flexible wire assembly 40 is arranged between the housing assembly 10 and the stator assembly 30.

[0031] The housing assembly 10 includes a housing 11, a rear end cover 12, a sealing cover 13, and a coupling 14; the rear end cover 12 is concentrically installed inside one end of the housing 11; the sealing cover 13 is arranged outside the rear end cover 12, and a through hole for passing through the pin 51 is provided thereon; the glue grooves on the sealing cover 13 and the housing 11 are filled with glue, and the gap between the sealing cover 13 and the pin 51 is filled with glue to ensure good sealing at the sealing cover 13 during high-temperature steam disinfection; one end of the coupling 14 is arranged outside the rotor assembly 20 and is fixed to the other end of the housing 11 by a socket head cap screw, and the other end is provided with an internal thread for connecting the disinfection seal 60; a snap ring 141 is arranged on the coupling 14. In order to further improve the good sealing performance at the connection between the coupling 14 and the housing 11, a sealing gasket 15 is arranged between the housing 11 and the coupling 14.

[0032] Please refer to Figure 4 , an external thread 61 is provided on the disinfection seal 60, and the disinfection seal 60 is threadedly connected to the coupling 14. An annular groove 62 is also provided on the disinfection seal 60, and an O-ring 70 is arranged in the annular groove 62 to improve the sealing performance between the disinfection seal 60 and the coupling 14 and ensure that the rotor assembly 20 inside the bearing joint 14 is in a good sealed environment during high-temperature steam disinfection.

[0033] The rotor assembly 20 includes a shaft 21, a main magnet 22, a sub-magnet 23, and a bearing 24; the shaft 21 is rotatably installed in the housing assembly 10 through the bearing 24; the main magnet 22 is sleeved on the shaft 21, and the main magnet 22 is located between the two bearings 24, and the bearing 24 can be a ball bearing; the sub-magnet 23 is installed inside the first end of the shaft 21, and the first end of the shaft 21 is arranged inside the rear end cover 12. A steel gasket 25 is also arranged between the bearing 24 and the main magnet 22; a spring 80, such as a wave spring, is arranged between the bearing 24 and the rear end cover 12.

[0034] The stator assembly 30 is limit-mounted on the housing 11 through the support arc 31. Specifically, the support arc 31 is fixedly installed at one end of the housing 11, and a step 311 is provided on the support arc 31, and the stator assembly 30 is limit-mounted at the step 311; a retaining arc 32 for supporting the stator assembly 30 is also fixedly provided at the other end of the housing 11.

[0035] The flexible wire assembly 40 includes a flexible printed circuit board (FPC) 41 and an LED lamp 42. The flexible printed circuit board 41 is installed between the housing 11 and the stator assembly 30, with one end fixed on the PCB board 52; the other end is fixedly connected to the LED lamp 42. Specifically, the LED lamp 42 can be soldered on the flexible printed circuit board 41.

[0036] The support arc 31, the retaining arc 32, the stator assembly 30, the flexible printed circuit board (FPC) 41 and the housing 11 are integrally potted with epoxy glue 90, and an epoxy glue layer with a certain thickness is formed between the stator assembly 30 and the housing 11.

[0037] Specifically, the PCB board 52 is arranged between the rear end cover 12 and the sealing cover 13, and the pin 51 is soldered thereon to achieve electrical connection with an external device; the three-phase lead-out wires of the stator assembly 30 are soldered on the PCB board 52.

[0038] Furthermore, in order to ensure electrical safety, an insulating gasket 53 is provided between the three-phase lead-out wires of the stator assembly 30 and the rear end cover 12.

[0039] In summary, in the present utility model, glue is filled in the glue grooves on the sealing cover 12 and the housing 11, and the coupling 14 is sealed with the disinfection seal 60 at the other end of the housing 11, so the overall sealing performance is good and it is resistant to high-temperature steam disinfection; at the same time, the stator assembly 30, the flexible wire assembly 40 and the housing assembly 10 of the present utility model are integrally potted with epoxy glue 90, and an overhead glue layer can be formed between the stator core and the coil and other heat-generating components in the stator assembly 30 and the housing assembly 10, thereby ensuring that the motor has a low hand feeling temperature during use.

[0040] Therefore, the present utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value. The above embodiments are only illustrative of the principles and effects of the present utility model and are not used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A motor resistant to high temperature steam sterilization, characterized in that: include case; a rear end cover, concentrically mounted within one end of the housing; A sealing cover is arranged outside the rear end cover; the sealing cover and the glue grooves on the housing are filled with glue; A coupling, one end of which is fixed to the other end of the housing; A sterile sealing member is sealingly connected to the coupling.

2. The motor resistant to high temperature steam sterilization according to claim 1, characterized in that: The sealing cover is provided with a through hole for passing the insertion pin, and the gap between the sealing cover and the insertion pin is filled with glue.

3. The motor resistant to high temperature steam sterilization according to claim 1, characterized in that: A sealing gasket is arranged between the housing and the coupling.

4. The motor resistant to high temperature steam sterilization according to claim 1, characterized in that: The other end of the coupling is provided with an internal thread, the disinfection sealing member is provided with an external thread, and the coupling is threadedly connected with the disinfection sealing member.

5. The motor resistant to high temperature steam sterilization according to claim 1, characterized in that: The disinfection seal is provided with an annular groove, and an O-type sealing ring is provided in the annular groove.

6. The motor resistant to high temperature steam sterilization according to claim 1, characterized in that: It also includes a stator assembly, which is mounted on the shell through a support arc limiter, and the stator assembly, the support arc and the shell are integrally potted with epoxy glue.

7. The motor resistant to high temperature steam sterilization according to claim 6, characterized in that: It also includes a flexible line component, which includes a flexible circuit board and an LED lamp; the flexible circuit board is installed between the shell and the stator assembly, one end of which is fixed on the PCB board; and the other end is fixedly connected to the LED lamp.

8. The motor resistant to high temperature steam sterilization according to claim 7, characterized in that: The PCB board is arranged between the rear end cover and the sealing cover, and pins and three-phase lead wires of the stator assembly are welded on the PCB board.

9. The motor resistant to high temperature steam sterilization according to claim 8, characterized in that: An insulating gasket is arranged between the three-phase lead wires of the stator assembly and the rear end cover.

10. The motor resistant to high temperature steam sterilization according to claim 1, characterized in that: It also includes a rotor assembly, which includes a shaft, a main magnet, a secondary magnet and a bearing; the shaft is rotatably mounted in the housing through the bearing; the main magnet is sleeved on the shaft and is located between the two bearings; the secondary magnet is installed in the first end of the shaft, and the first end of the shaft is arranged in the rear end cover; a steel pad is also arranged between the bearing and the main magnet.

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