CN219535779U - Hollow cup motor for dentistry - Google Patents

Abstract

The utility model discloses a dental hollow cup motor, which comprises a shell, a stator assembly and a rotor assembly which are positioned in the shell, a circuit board positioned at one end of the stator assembly, a front cover and a rear cover which are fixed at two ends of the shell, and an outer connector which is fixed at the forefront end of the shell, wherein the front cover and the rear cover are arranged at the front end of the shell; the shell is of a cylindrical structure with two open ends and hollow inside; an LED chamber for accommodating an LED lamp is formed between the front cover and the outer connector; the stator assembly comprises a stator punching assembly and a stator coil; the LED lamp is electrically connected with the circuit board through a lamp wire with an insulating layer, and the lamp wire and the stator coil I are wound in parallel. The lamp wire of the LED lamp is routed in the motor, the lamp wire is wound into the stator coil together during winding, the lamp wire is shaped together with the stator coil, the volume is almost consistent with that of the original coil, the operation is simple and convenient, no extra cost is generated, and the stator punching sheet assembly can be round and cannot influence the performance of the motor.

Description

Hollow cup motor for dentistry

Technical Field

The utility model relates to the technical field of dental treatment, in particular to a hollow cup motor for dentistry.

Background

The existing dental cup motor needs a lighting system when working, and the lighting system is often arranged outside the motor, and then an outer shell is added for protecting a lighting system circuit. This results in a larger space, and the lighting system requires additional protection and is more costly. The illumination system is arranged inside the motor, so that the cost can be saved.

In the prior art, when the lighting system is arranged inside the hollow cup motor, a wiring space is a design key point, a slot is generally formed in the stator core to avoid the wiring, the shape of the stator core needs to be changed, a notch is reserved on the core to supply the wiring, and the disadvantage is that the stator core is not round any more, so that the motor performance can be influenced.

If the shape of the stator core is not changed, the stator core can be grooved on the shell for wiring, and the performance of the motor is not affected. The slotting position is shown in the figure, and is the gap between the shell and the iron core. The disadvantage of this solution is that the thickness of the casing, if too thin, cannot be machined, and even if not thin, the difficulty of machining is great and the cost is too high.

Therefore, how to design a dental hollow cup motor which does not affect the performance of the motor and is convenient to process is a technical problem which needs to be solved at present.

Disclosure of Invention

The utility model provides a dental hollow cup motor for solving the technical problems that the performance of the motor is affected or the processing difficulty is high and the cost is too high when the dental hollow cup motor is internally wired in the prior art.

The technical scheme adopted for solving the technical problems is as follows: a hollow cup motor for dentistry comprises a shell, a stator assembly and a rotor assembly which are positioned in the shell, a circuit board positioned at one end of the stator assembly, a front cover and a rear cover which are fixed at two ends of the shell, and an outer connector which is fixed at the foremost end of the shell; the shell is of a cylindrical structure with two open ends and hollow inside; an LED chamber for accommodating an LED lamp is formed between the front cover and the outer connector; the stator assembly comprises a stator punching assembly and a stator coil; the LED lamp is electrically connected with the circuit board through a lamp wire with an insulating layer, and the lamp wire and the stator coil I are wound in parallel.

Further, the lamp wire is an enameled wire.

Further, the outer connector comprises a sleeve sleeved at one end of the rotating shaft in the rotor assembly and an end cover which is positioned on the periphery of the sleeve and fixedly connected with the casing, and the front end of the sleeve is provided with an inner threaded hole connected with the client.

Further, the LED chamber is located between the end cover and the front cover, a first screw hole and a first sealing glue hole for transmitting light are formed in the end cover, and transparent glue is filled in the first sealing glue hole.

Further, the inner peripheral surface of the front end of the shell is provided with a second sealing hole for fixing the lamp holder of the LED lamp.

Further, the inside of casing has the collar that is located the front cover rear end face, have on the collar with the cooperation of first screw hole use second screw hole and with the fixed third screw hole of front cover, the second seal glue hole is located on the collar.

Further, the rear end of the casing is provided with a fourth threaded hole connected with a pre-tightening nut so that the pre-tightening nut is fixed with the rear cover.

Further, three contact pins connected with the three-phase wiring of the stator assembly and two contact pins connected with the lamp wires of the LED lamps are arranged on the circuit board.

Further, the inner peripheral surface of the shell is provided with a limiting ring positioned on the front end surface of the stator assembly, and the mounting ring is positioned between the limiting ring and the front cover.

Further, bearing chambers for accommodating bearings are formed in the inner circumferences of the front cover and the rear cover, and the bearings connected with the front cover are axially limited between the springs and limiting shoulders of the front cover; the bearing connected with the rear cover is axially limited between the limiting sleeve and the limiting shoulder of the rear cover; the spring and the limit sleeve are positioned at two axial ends of the magnetic steel in the rotor assembly.

The beneficial effects of the utility model are as follows:

(1) According to the dental hollow cup motor, the lamp wires of the LED lamps are wired in the motor, the lamp wires are wound into the stator coil together during winding, the lamp wires are shaped together with the stator coil, the size is almost consistent with that of the original coil, the operation is simple and convenient, no extra cost is caused, and the stator punching sheet assembly can be round and cannot influence the performance of the motor.

(2) According to the dental hollow cup motor, the enameled wire has the insulation characteristic, the current intensity of the lamp wire is low, and the enameled wire can be used as the lamp wire of the LED lamp for wiring.

(3) According to the dental hollow cup motor, only the front lamp wire and the rear lamp wire are added to the stator assembly, and the structure of the stator punching sheet assembly is not required to be changed, so that the performance of the whole motor is not affected.

(4) According to the dental hollow cup motor, the LED lamp is positioned between the outer connector and the front cover, and the outer connector is provided with the first glue sealing hole for transmitting light, so that the LED lamp can be protected and the luminous effect is not influenced.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is an exploded view of a particular embodiment of a dental cup motor according to the present utility model (stator assembly within housing);

FIG. 2 is an axial cross-sectional view of an embodiment of a dental cup motor according to the present utility model;

FIG. 3 is an assembly view of a stator assembly and a housing;

FIG. 4 is a schematic diagram of the routing of a light wire;

fig. 5 is a schematic view of the stator coil as seen from the front end;

FIG. 6 is a schematic view of the stator coil as viewed from the rear end;

FIG. 7 is a schematic view of a rotor assembly of the present utility model;

fig. 8 is a cross-sectional view of the outer joint head of the present utility model;

fig. 9 is a side view of the outer joint head of the present utility model;

FIG. 10 is a cross-sectional view of the housing of the present utility model;

FIG. 11 is a side view of the housing of the present utility model;

FIG. 12 is a side view of the front cover of the present utility model;

FIG. 13 is a cross-sectional view of the front cover of the present utility model;

fig. 14 is a perspective view of a wiring board in the present utility model.

In the figure, 1, a housing, 101, a mounting ring, 102, a second threaded hole, 103, a third threaded hole, 104, a limiting ring, 105, a fourth threaded hole, 2, a stator assembly, 201, a stator punching assembly, 202, a stator coil, 3, a rotor assembly, 301, an inner connector, 302, a rotating shaft, 303, a balance block, 304, magnetic steel, 305, a copper sleeve, 306, an induction magnetic ring, 4, a circuit board, 401, a contact pin, 5, a front cover, 6, a rear cover, 7, an outer connector, 701, a sleeve, 702, an end cover, 703, an inner threaded hole, 8, an LED lamp, 801, a lamp holder, 9, an LED chamber, 10, a lamp wire, 11, a first screw hole, 12, a first sealing hole, 13, a second sealing hole, 14, a mounting hole, 15, a threading hole, 16, a pre-tightening nut, 17, a spring, 18, a limiting shoulder, 19, a limiting sleeve, 20, a bearing, 21 and a bearing chamber.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The utility model takes one end which is close to the client in the axial direction as the front, and takes one end which is far away from the client in the axial direction as the rear.

As shown in fig. 1 to 4, a hollow cup motor for dentistry comprises a casing 1, a stator assembly 2 and a rotor assembly 3 which are positioned in the casing 1, a circuit board 4 positioned at one end of the stator assembly 2, a front cover 5 and a rear cover 6 which are fixed at two ends of the casing 1, and an outer connector 7 which is fixed at the foremost end of the casing 1; the shell 1 is of a cylindrical structure with two open ends and hollow inside; the shell 1, the front cover 5 and the rear cover 6 enclose a cavity for accommodating the stator assembly 2, the rotor assembly 3 and the circuit board 4, and an LED chamber 9 for accommodating an LED lamp 8 is formed between the front cover 5 and the outer connector 7; the stator assembly 2 includes a stator lamination assembly 201 and a stator coil 202; the LED lamp 8 is electrically connected to the circuit board 4 via a lamp wire 10 with an insulating layer, and the lamp wire 10 is wound together with the stator coil 202. The outer connector 7 is used for being connected with the customer end, and stator module 2 passes through circuit board 4 and is connected with the power electricity, and when the power was circular telegram, stator module 2 produced rotating magnetic field, and rotor assembly 3 is rotatory under rotating magnetic field effect to drive the customer end motion.

The hollow cup motor is characterized in that the stator assembly 2 has no framework, the stator punching assembly 201 is formed by stacking a plurality of stator punching sheets, the stator punching assembly 201 has no slotted circular ring shape, the stator coil 202 has self-adhesion, and the stator coil 202 is adhered inside the stator punching assembly 201.

Because the lamp wire 10 is provided with the insulating layer, when the stator coil 202 is manufactured, the lamp wire 10 can be wound into the stator coil 202 together during winding, and is shaped together with the stator coil 202, so that the operation is simple and convenient, and no extra cost is generated.

Preferably, the lamp wire 10 is an enameled wire. The enameled wire has insulating property, and the lamp wire 10 has low current intensity and can be replaced. Also, the light wire 10 may be shaped with the stator coil 202 to have a volume nearly identical to the original stator coil 202.

The LED lamp 8 is axially located in front of the stator assembly 2, and the lamp wire 10 is LED in from the front end of the stator coil 202 and LED out from the rear end of the stator coil 202, as shown in fig. 4, the lamp wire 10 is LED in on the left side, and the lamp wire 10 and the motor three-phase wire are LED out on the right side. As shown in fig. 5 and 6, two positive and negative electrode wires 10 extend from the front end of the stator coil 202, and two positive and negative electrode wires 10 and three-phase outgoing wires of V-phase, U-phase and W-phase of the motor extend from the rear end of the stator coil 202.

The circuit board 4 is connected with the three phase line of the motor and the lamp wire 10 of the LED lamp 8, so as shown in fig. 14, five pins 401 are provided on the circuit board 4, wherein three pins 401 are connected with the three-phase wiring of the stator assembly 2, and the other two pins 401 are connected with the lamp wire 10 of the LED lamp 8. The same circuit board 4 is used for the three-phase line of the motor and the lamp line 10, so that space can be saved, and interference between the three-phase line and the lamp line is avoided.

As shown in fig. 7, the rotor assembly 3 generally includes an inner connector 301, a rotating shaft 302, a balance block 303 and a magnetic steel 304, wherein the inner connector 301 and the rotating shaft 302 are fixed by pins, and the rest parts are bonded by glue. Preferably, the rear end of the rotating shaft 302 is further provided with a copper sleeve 305 and an induction magnetic ring 306, and the induction magnetic ring 306 is a feedback device and can be used for adjusting the rotating speed. Copper sleeve 305 protects inductive magnetic loop 306.

Outer joint 7:

as shown in fig. 8 and 9, the outer connector 7 includes a sleeve 701 sleeved at one end of the rotating shaft 302 in the rotor assembly 3, and an end cover 702 located at the outer periphery of the sleeve 701 and fixedly connected to the casing 1, and the front end of the sleeve 701 has an internal threaded hole 703 connected to the client. The sleeve 701 wraps the front end of the rotating shaft 302, is used for connecting the rotating shaft 302 with a moving part of a client, protects the front end of the rotating shaft 302, is fixed at the position of the internal threaded hole 703, has the outer diameter of the end cover 702 larger than that of the sleeve 701, can be fixed with the casing 1, and plays a role in stabilizing the external connector 7.

The LED chamber 9 is located between the end cover 702 and the front cover 5, at this time, the LED lamp 8 may be disposed near the inner wall of the casing 1, the end cover 702 has a first screw hole 11 and a first sealing hole 12 for light transmission, and a transparent adhesive is encapsulated at the first sealing hole 12. The sealing glue hole is a hole in front of the LED lamp 8, and the light of the LED lamp 8 shines out through the hole and is encapsulated by transparent glue. The first screw hole 11 is preferably a stepped hole for assembly, and the outer joint 7 may be fixed to the casing 1 with a pan head screw.

The LED lamp 8 may be fixed to the cabinet 1, and as shown in fig. 10, the inner circumferential surface of the front end of the cabinet 1 has a second sealing hole 13 for fixing a lamp holder 801 of the LED lamp 8. The lamp holder 801 of the LED lamp 8 can be fixed by the sealing glue at the second sealing glue hole 13, the lamp holder 801 of the LED lamp 8 is positioned at the rear part of the LED lamp 8, the front part of the LED lamp 8 is a luminous part, and the LED lamp is positioned in the LED chamber 9.

The inside of the casing 1 is provided with a mounting ring 101 positioned on the rear end face of the front cover 5, the mounting ring 101 is provided with a second threaded hole 102 matched with the first threaded hole 11 for use and a third threaded hole 103 fixed with the front cover 5, and the second sealing glue hole 13 is positioned on the mounting ring 101. As shown in fig. 11, the second screw holes 102 are provided in three, and the pan head screws are assembled with the outer joint 7, and the third screw holes 103 are provided in two, and the pan head screws are assembled with the front cover 5. Correspondingly, as shown in fig. 12 and 13, two mounting holes 14 for mounting flat head screws are formed on the front cover 5, and a threading hole 15 for passing the lamp wire 10 is formed on the front cover 5. Preferably, the inner peripheral surface of the casing 1 has a stop ring 104 located at the front end surface of the stator assembly 2, and the mounting ring 101 is located between the stop ring 104 and the front cover 5. The limiting ring 104 plays an axial limiting role on the stator assembly 2, and simultaneously separates the stator assembly 2 from the front cover 5 and the outer connector 7, so that the stator assembly 2 is prevented from being damaged during installation.

The rear cover 6 may be fixed to the housing 1 by screws similar to the front cover 5, and in the preferred embodiment of the present utility model, the rear end of the housing 1 has a fourth screw hole 105 to which the pretensioning nut 16 is connected, so that the pretensioning nut 16 is fixed to the rear cover 6. The pre-tightening nut 16 can be abutted against the rear end of the rear cover 6 after being fixed with the machine shell 1, and the rear cover 6 is limited and fixed through the machine shell 1 and the pre-tightening nut 16.

The shaft 302 is rotatably connected with the casing 1 through the bearing 20, and the bearing chamber 21 for mounting the bearing 20 is usually located on the front cover 5 and the rear cover 6, and in the preferred embodiment of the present utility model, the bearing 20 connected with the front cover 5 is axially limited between the spring 17 and the limiting shoulder 18 of the front cover 5; the bearing 20 connected with the rear cover 6 is axially limited between the limit sleeve 19 and the limit shoulder 18 of the rear cover 6; the spring 17 and the stop collar 19 are positioned at two axial ends of the magnetic steel 304 in the rotor assembly 3. Compared with the prior structure of the axial limit bearing 20 through the shoulder, the arrangement of the spring 17 can reduce the installation difficulty of the bearing 20, reduce the precision requirement of the limit structure of the bearing 20, and avoid the shaking of the bearing 20 caused by insufficient precision.

In the description of the present utility model, it should be understood that the terms "front", "rear", "left", "right", "inner", "outer", "axial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the term "connected" should be interpreted broadly, and for example, it may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In this specification, a schematic representation of the terms does not necessarily refer to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (10)

1. A hollow cup motor for dentistry, which is characterized in that: the motor comprises a machine shell (1), a stator assembly (2) and a rotor assembly (3) which are arranged in the machine shell (1), a circuit board (4) which is arranged at one end of the stator assembly (2), a front cover (5) and a rear cover (6) which are fixed at two ends of the machine shell (1) and an outer connector (7) which is fixed at the foremost end of the machine shell (1);

the shell (1) is of a cylindrical structure with two open ends and a hollow interior; an LED chamber (9) for accommodating an LED lamp (8) is formed between the front cover (5) and the outer connector (7); the stator assembly (2) comprises a stator lamination assembly (201) and a stator coil (202); the LED lamp (8) is electrically connected with the circuit board (4) through a lamp wire (10) with an insulating layer, and the lamp wire (10) and the stator coil (202) are wound together.

2. The dental cup motor of claim 1, wherein: the lamp wire (10) is an enameled wire.

3. The dental cup motor of claim 1, wherein: the outer connector (7) comprises a sleeve (701) sleeved at one end of the rotating shaft (302) of the rotor assembly (3) and an end cover (702) which is positioned on the periphery of the sleeve (701) and fixedly connected with the shell (1), and the front end of the sleeve (701) is provided with an inner threaded hole (703) connected with the client.

4. A dental cup motor according to claim 3, wherein: the LED lamp is characterized in that the LED chamber (9) is located between the end cover (702) and the front cover (5), a first screw hole (11) and a first sealing glue hole (12) for transmitting light are formed in the end cover (702), and transparent glue is filled in the first sealing glue hole (12).

5. The dental cup motor of claim 4 wherein: the inner peripheral surface of the front end of the shell (1) is provided with a second sealing glue hole (13) for fixing a lamp holder (801) of the LED lamp (8).

6. The dental cup motor of claim 5 wherein: the inside of casing (1) has collar (101) that are located preceding lid (5) rear end face, have on collar (101) with first screw hole cooperation second screw hole (102) and with preceding lid (5) fixed third screw hole (103), second seal glue hole (13) are located on collar (101).

7. The dental cup motor of claim 5 wherein: the rear end of the housing (1) is provided with a fourth threaded hole (105) connected with a pre-tightening nut (16) so as to fix the pre-tightening nut (16) with the rear cover (6).

8. The dental cup motor of claim 1, wherein: three contact pins (401) connected with the three-phase wiring of the stator assembly (2) and two contact pins (401) connected with the lamp wires (10) of the LED lamps (8) are arranged on the circuit board (4).

9. The dental cup motor of claim 6 wherein: the inner peripheral surface of the shell (1) is provided with a limiting ring (104) positioned on the front end surface of the stator assembly (2), and the mounting ring (101) is positioned between the limiting ring (104) and the front cover (5).

10. The dental cup motor of claim 1, wherein: the inner circumferences of the front cover (5) and the rear cover (6) are provided with bearing chambers (21) for accommodating bearings (20), and the bearings (20) connected with the front cover (5) are axially limited between the springs (17) and limit shoulders (18) of the front cover (5); the bearing (20) connected with the rear cover (6) is axially limited between the limit sleeve (19) and the limit shoulder (18) of the rear cover (6); the spring (17) and the limit sleeve (19) are positioned at two axial ends of the magnetic steel in the rotor assembly (3).