CN212210724U

CN212210724U - Built-in driven small-tooth-difference speed reduction all-in-one machine

Info

Publication number: CN212210724U
Application number: CN202020516581.5U
Authority: CN
Inventors: 李汉江
Original assignee: Shenzhen Qichilong Technology Co ltd
Current assignee: Shenzhen Qichilong Technology Co ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-12-22
Anticipated expiration: 2030-04-09

Abstract

The utility model discloses a built-in driven small tooth difference speed reduction integrated machine, which comprises a support shaft, a stator, a rotor, a rolling friction piece, a flexible gear and a rigid gear; the rotor is provided with a circular hole, the supporting shaft and the stator are positioned in the circular hole of the rotor, and the supporting shaft, the stator and the rotor form an outer rotor motor; a rolling friction piece is arranged between the rotor and the flexible gear, the flexible gear is meshed with the rigid gear, and a small-tooth-difference transmission system is formed among the rotor, the rolling friction piece, the flexible gear and the rigid gear. The utility model discloses a built-in driven few tooth difference speed reduction all-in-one, its integrated level is high, can effectually reduce the equipment volume.

Description

Built-in driven small-tooth-difference speed reduction all-in-one machine

Technical Field

The utility model relates to a speed reducer technical field especially relates to a built-in driven few tooth difference speed reduction all-in-one.

Background

The harmonic reducer is a high-precision speed reducer and is widely applied to precision transmission machinery. The flexible vibration motor mainly comprises four basic components, namely a shock wave device, a flexible gear, a flexible bearing and a rigid gear, wherein a rotor is generally elliptic. The harmonic reducer is a gear transmission mechanism which uses a shock wave device to assemble a flexible bearing to make a flexible gear generate controllable elastic deformation and is meshed with a rigid gear to transmit motion and power.

At present, the harmonic reducer is generally used for being connected with a motor, so that the effect of reducing the speed of the motor and improving the torque of the motor is achieved, but the overall size of equipment is larger due to the fact that the harmonic reducer and the motor are two different parts. How to reduce the volume of the equipment is a problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a few tooth difference speed reduction all-in-one machine of built-in drive, its integrated level is high, can effectually reduce the equipment volume.

The purpose of the utility model is realized by adopting the following technical scheme:

a built-in drive small tooth difference speed reduction all-in-one machine comprises: the device comprises a support shaft, a stator, a rotor, a rolling friction piece, a flexible gear and a rigid gear; the rotor is provided with a round hole, the supporting shaft and the stator are positioned in the round hole of the rotor, and the supporting shaft, the stator and the rotor form an outer rotor motor; the rolling friction piece is arranged between the rotor and the flexible gear, the flexible gear is meshed with the rigid gear, and a small-tooth-difference transmission system is formed among the rotor, the rolling friction piece, the flexible gear and the rigid gear.

Preferably, the inner wall of the round hole formed in the rotor is provided with at least one permanent magnetic pole, and the stator comprises a coil winding and an iron core.

Further, the stator, the rotor, the rolling friction member, the flexible gear and the rigid gear are located in the same plane, and the plane is parallel to the radial direction of the support shaft.

Furthermore, the periphery of the rotor is circular, and the periphery of the rotor and the circular hole of the rotor are eccentrically arranged; the flexible gear is provided with an inner ring and outer teeth, and the rigid gear is provided with inner teeth; the flexible gear inner ring is sleeved on the periphery of the rotor; the outer teeth of the flexible gear are meshed with the inner teeth of the rigid gear on one side far away from the center of the circular hole.

Further, the rolling friction piece is a bearing.

Further, the rolling friction piece is a roller pin or a ball; and two sides of the rotor in the thickness direction are respectively provided with a baffle plate, and the baffle plates are used for limiting the rolling friction piece.

Furthermore, the periphery of the rotor is oval, and the center of the round hole of the rotor is superposed with the center of the periphery of the rotor; the flexible gear is provided with an inner ring and outer teeth, and the rigid gear is provided with inner teeth; the flexible gear inner ring is sleeved on the periphery of the rotor; accommodating parts are arranged at two ends of a long shaft on the periphery of the rotor, and the rolling friction piece is only arranged in the accommodating parts; the outer teeth of the flexspline mesh with the inner teeth of the rigid spline at both ends of the long shaft near the outer periphery of the rotor.

Furthermore, the periphery of the rotor is oval, and the center of the round hole is superposed with the center of the periphery of the rotor; and the flexible gear and the rigid gear form movable tooth two-tooth difference transmission.

Furthermore, the periphery of the rotor is in a shape of a rounded triangle, and the center of the round hole is superposed with the center of the periphery of the rotor; the flexible gear is provided with an inner ring and outer teeth, and the rigid gear is provided with inner teeth; the flexible gear inner ring is sleeved on the periphery of the rotor; an accommodating part is arranged at the round corner end of the periphery of the rotor, and the rolling friction piece is only arranged in the accommodating part; the outer teeth of the flexspline mesh with the inner teeth of the rigid spline near the fillets of the rotor.

Further, the rigid gear sets up to two, is first rigid gear and second rigid gear respectively, the flexbile gear is two external teeth flexbile gear, and it has first flexbile gear external tooth and second flexbile gear external tooth, the internal tooth of first rigid gear with first flexbile gear external tooth meshing, the internal tooth of second rigid gear with second flexbile gear external tooth meshing.

Compared with the prior art, the beneficial effects of the utility model reside in that: the rotor sets the shock wave ware into, and the outside is the poor transmission of few tooth, and inside is the electric drive, promptly the utility model discloses compound the integrated inside of rotor with the external rotor electric machine, the integrated level is high, so has just effectually reduced the utility model discloses the volume of built-in driven few tooth difference speed reduction all-in-one.

Drawings

Fig. 1 is a schematic diagram of a first embodiment of the built-in driving small-tooth-difference speed reduction all-in-one machine of the present invention;

FIG. 2 is a schematic diagram of a second embodiment of the built-in driving small tooth difference speed reduction all-in-one machine of the present invention;

FIG. 3 is a schematic diagram of a third embodiment of the built-in driving small tooth difference speed reduction all-in-one machine of the present invention;

FIG. 4 is a schematic diagram of a fourth embodiment of the built-in driving small tooth difference speed reduction all-in-one machine of the present invention;

fig. 5 is a schematic diagram of the NGWN type transmission of the built-in driven small tooth difference speed reduction all-in-one machine of the present invention.

Fig. 6 is a schematic diagram of the flexible gear and the rigid gear supported at both ends of the support shaft of the small tooth difference speed reduction integrated machine with built-in drive of the present invention.

In the figure: 1. a rotor; 11. a rolling friction member; 12. a circular hole; 13. an accommodating portion; 21. a flexible gear; 211. a rolling groove; 212. a first flexspline outer tooth; 213. a second flexspline outer tooth; 22. a rigid wheel; 221. a first rigid wheel; 222. a second rigid wheel; 31. a support shaft; 32. an iron core; 33. a coil winding; 34. and a permanent magnet.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model discloses a built-in driven few tooth difference speed reduction all-in-one machine, it includes back shaft 31, stator, rotor 1, rolling friction piece 11, flexbile gear 21 and rigid wheel 22 at least; the rotor 1 is provided with a round hole 12, the supporting shaft 31 and the stator are positioned in the round hole 12 of the rotor 1, and the supporting shaft 31, the stator and the rotor 1 form an outer rotor 1 motor; a rolling friction piece 11 is arranged between the rotor 1 and the flexible gear 21, the flexible gear 21 is meshed with the rigid gear 22, and a small-tooth-difference transmission system is formed among the rotor 1, the rolling friction piece 11, the flexible gear 21 and the rigid gear 22. In the present invention, the rotor 1 may be regarded as a shock wave generator. At least one permanent magnetic pole is arranged on the inner wall of a round hole 12 formed in the rotor 1. In particular, the permanent magnet pole may be selected to be a permanent magnet 34. The stator includes a coil winding 33 and a core 32. In addition, the support shaft 31 may be hollow, and the hollow support shaft 31 may facilitate routing.

The utility model discloses in, rotor 1 sets the shock wave ware to, and the outside is the poor transmission of few tooth, and inside is the electric drive, promptly the utility model discloses compound the integrated inside of rotor 1 with external rotor 1 motor, the integrated level is high, so just effectually dwindles the utility model discloses the volume of built-in driven few tooth difference speed reduction all-in-one makes it have more extensive using value. Preferably, the stator, the rotor 1, the rolling friction members 11, the flexspline 21, and the circular spline 22 are located in the same plane, and the plane is parallel to the radial direction of the support shaft 31. Through such an arrangement, the occupation of the axial space can be further reduced.

Preferably, referring to fig. 1, the outer circumference of the rotor 1 is circular, and the outer circumference of the rotor 1 is eccentrically arranged with respect to the circular hole 12 of the rotor 1; the flexible gear 21 has an inner ring and an outer tooth, and the rigid gear 22 has an inner tooth; the inner ring of the flexible gear 21 is sleeved on the periphery of the rotor 1; the outer teeth of the flexspline 21 mesh with the inner teeth of the circular spline 22 on the side away from the center of the circular hole 12. The rotor 1 having the above arrangement has a wave number of one. Specifically, the rolling friction member 11 is a bearing (not shown). Namely, the inner ring of the flexible gear 21 is sleeved on the outer periphery of the rotor 1 through a bearing. Of course, the rolling friction member 11 may be a roller pin or a ball, and when the roller pin or the ball is used, in order to avoid the roller pin or the ball falling off, the present invention adopts a conventional limiting manner in which a baffle (not shown) is disposed on both sides of the thickness direction of the rotor 1 for limiting.

Preferably, referring to fig. 2, the outer circumference of the rotor 1 is oval, and the center of the circular hole 12 of the rotor 1 coincides with the center of the outer circumference of the rotor 1; the flexible gear 21 has an inner ring and an outer tooth, and the rigid gear 22 has an inner tooth; the inner ring of the flexible gear 21 is sleeved on the periphery of the rotor 1; both ends of the long shaft of the periphery of the rotor 1 are provided with accommodating parts 13, and only the accommodating parts 13 are provided with rolling friction pieces 11; the outer teeth of the flexspline 21 mesh with the inner teeth of the ring spline 22 at both ends of the long axis near the outer periphery of the rotor 1. The rotor 1 having the above arrangement has a wave number of two. In the above arrangement, the rolling friction member 11 is only arranged in the accommodating portion 13, so that the inner space of the rotor 1 can be saved, the assembly difficulty of the outer rotor 1 motor is reduced, and the motor has great economic value.

Preferably, referring to fig. 3, the outer circumference of the rotor 1 is oval, and the center of the circular hole 12 coincides with the center of the outer circumference of the rotor 1; the flexible gear 21 and the rigid gear 22 form oscillating tooth two-tooth difference transmission. The rotor 1 having the above arrangement has the same wave number of two. Specifically, rolling grooves 211 are formed in the flexible gear 21, the rolling grooves 211 are circumferentially and uniformly distributed on the flexible gear 21, the length directions of the rolling grooves 211 point to the center of the rotor 1, a rolling friction piece 11 is arranged in each rolling groove 211, the outer side of the flexible gear 21 is in contact with the rolling friction piece 11, and a wavy surface meshed with the rolling friction piece 11 is arranged on the inner side of the rigid gear 22.

Preferably, referring to fig. 4, the outer periphery of the rotor 1 is in a shape of a rounded triangle, and the center of the circular hole 12 coincides with the center of the outer periphery of the rotor 1; the flexible gear 21 has an inner ring and an outer tooth, and the rigid gear 22 has an inner tooth; the inner ring of the flexible gear 21 is sleeved on the periphery of the rotor 1; an accommodating part 13 is arranged at the round corner end of the periphery of the rotor 1, and a rolling friction piece 11 is arranged in the accommodating part 13; the outer teeth of the flexspline 21 mesh with the inner teeth of the circular spline 22 at a rounded corner near the rotor 1. The rotor 1 having the above arrangement has a wave number of three. Also, in this arrangement, since the rolling friction member 11 is disposed only in the accommodating portion 13, the inner space of the rotor 1 can be saved, thereby reducing the difficulty of assembling the motor of the outer rotor 1 and having a great economic value.

Preferably, as shown in fig. 5, the rigid gears 22 are provided in two, that is, a first rigid gear 221 and a second rigid gear 222, and the flexible gear 21 is a double-outer-tooth flexible gear having a first flexible gear outer tooth 212 and a second flexible gear outer tooth 213, wherein the inner tooth of the first rigid gear 221 is engaged with the first flexible gear outer tooth 212, and the inner tooth of the second rigid gear 222 is engaged with the second flexible gear outer tooth 213. Such a compound approach can achieve extremely large gear ratios.

Preferably, referring to fig. 6, when the flexible gear 21 is fixed to the supporting shaft 31 and the rigid gear 22 is supported at both ends of the supporting shaft 31, the small tooth difference speed reduction integrated machine with built-in drive of the present invention becomes a brushless harmonic speed reduction hub motor. Overrunning clutches can be arranged between the support shaft 31 and the rigid wheel 22 (hub), between the support shaft 31 and the flexible wheel 21 and between the flexible wheel 21 and the rigid wheel 22 (hub) according to requirements, so that the purposes of braking self-locking and accelerating are achieved, and the brake device has extremely high economic value particularly in the fields of electric automobiles, electric bicycles and the like.

The above is only the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.

Claims

1. The utility model provides a little tooth of built-in drive is poor slows down all-in-one which characterized in that includes: the device comprises a support shaft, a stator, a rotor, a rolling friction piece, a flexible gear and a rigid gear; the rotor is provided with a round hole, the supporting shaft and the stator are positioned in the round hole of the rotor, and the supporting shaft, the stator and the rotor form an outer rotor motor; the rolling friction piece is arranged between the rotor and the flexible gear, the flexible gear is meshed with the rigid gear, and a small-tooth-difference transmission system is formed among the rotor, the rolling friction piece, the flexible gear and the rigid gear.

2. The internal-drive small-tooth-difference speed reduction all-in-one machine as claimed in claim 1, wherein the inner wall of a round hole formed in the rotor is provided with at least one permanent magnetic pole, and the stator comprises a coil winding and an iron core.

3. The integrated machine of claim 1, wherein the stator, the rotor, the rolling friction member, the flexible gear and the rigid gear are located in a same plane, and the plane is parallel to a radial direction of the support shaft.

4. The built-in driving integrated machine with small tooth difference and speed reduction as set forth in claim 1, wherein the outer periphery of the rotor is circular and is eccentrically arranged with the circular hole of the rotor; the flexible gear is provided with an inner ring and outer teeth, and the rigid gear is provided with inner teeth; the flexible gear inner ring is sleeved on the periphery of the rotor; the outer teeth of the flexible gear are meshed with the inner teeth of the rigid gear on one side far away from the center of the circular hole.

5. The integrated machine of claim 4, wherein the rolling friction member is a bearing.

6. The built-in driving integrated machine with small tooth difference and speed reduction as claimed in claim 1, wherein the rolling friction piece is a roller pin or a ball; and two sides of the rotor in the thickness direction are respectively provided with a baffle plate, and the baffle plates are used for limiting the rolling friction piece.

7. The built-in driving integrated machine with small tooth difference and speed reduction as claimed in claim 1, wherein the periphery of the rotor is elliptical, and the center of the circular hole of the rotor coincides with the center of the periphery of the rotor; the flexible gear is provided with an inner ring and outer teeth, and the rigid gear is provided with inner teeth; the flexible gear inner ring is sleeved on the periphery of the rotor; accommodating parts are arranged at two ends of a long shaft on the periphery of the rotor, and the rolling friction piece is only arranged in the accommodating parts; the outer teeth of the flexspline mesh with the inner teeth of the rigid spline at both ends of the long shaft near the outer periphery of the rotor.

8. The built-in driving integrated machine with small tooth difference and speed reduction as claimed in claim 1, wherein the periphery of the rotor is elliptical, and the center of the circular hole coincides with the center of the periphery of the rotor; and the flexible gear and the rigid gear form movable tooth two-tooth difference transmission.

9. The built-in driving integrated machine with small tooth difference and speed reduction as claimed in claim 1, wherein the periphery of the rotor is in a shape of a rounded triangle, and the center of the round hole is coincident with the center of the periphery of the rotor; the flexible gear is provided with an inner ring and outer teeth, and the rigid gear is provided with inner teeth; the flexible gear inner ring is sleeved on the periphery of the rotor; an accommodating part is arranged at the round corner end of the periphery of the rotor, and the rolling friction piece is only arranged in the accommodating part; the outer teeth of the flexspline mesh with the inner teeth of the rigid spline near the fillets of the rotor.

10. The internal-drive small-tooth-difference speed reduction all-in-one machine according to any one of claims 4 to 7, wherein the rigid gears are arranged in two, namely a first rigid gear and a second rigid gear, the flexible gear is a double-external-tooth flexible gear which is provided with a first flexible gear external tooth and a second flexible gear external tooth, the first rigid gear internal tooth is meshed with the first flexible gear external tooth, and the second rigid gear internal tooth is meshed with the second flexible gear external tooth.