CN217271753U - Flexible gear for speed reducer and speed reducer with flexible gear - Google Patents

Abstract

The utility model provides a reduction gear is with flexbile gear and be equipped with reduction gear of this flexbile gear, including the flexbile gear wheel body, the flexbile gear wheel body be equipped with steel wheel complex ring gear, the terminal surface of flexbile gear wheel body is equipped with a plurality of cooperation archs, the cooperation arch be used for with driving medium transmission cooperation, transmit rotation moment between cooperation arch and the driving medium. The flexbile gear is established in the reduction gear, and the driving medium in the reduction gear not only can realize axial rotation's transmission through the clearance between the card cooperation arch, still can not add the holistic axial length of device, is showing the length that has shortened the reduction gear, simultaneously with this application flexbile gear complex rotate the piece only need can block the cooperation arch, this driving medium size can not be greater than the flexbile gear size, consequently can reduce the axial height dimension demand of reduction gear to reduce the whole size of reduction gear.

Description

Flexible gear for speed reducer and speed reducer with flexible gear

Technical Field

The utility model relates to a gear drive field especially relates to a reduction gear is with flexbile gear and be equipped with reduction gear of this flexbile gear.

Background

The harmonic reducer is widely applied to the scenes of aerospace, semiconductors, robots and the like which require high-precision transmission parts with compact structures, the current harmonic reducer mainly comprises a wave generator, a rigid gear, a flexible gear and other structural parts, wherein the flexible gear is in a cup shape or a short cylinder shape, the cup-shaped flexible gear needs to deform in the radial direction due to the flexible gear, so that the height of the cup-shaped flexible gear is higher and is difficult to shorten, the axial direction is longer, the axial size of the whole harmonic reducer is larger, the shortening of the flexible gear is always the target of pursuing harmonic reduction, and the reducer with larger size is not suitable for the transmission scenes with higher requirements on the radial size.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art's not enough, the utility model provides a reduction gear is with flexbile gear and be equipped with the reduction gear of this flexbile gear to it is longer to solve current flexbile gear length, leads to the great part of reduction gear axial dimension to require among the higher transmission scene of radial dimension and inapplicable technical problem.

The utility model discloses an one of the purpose adopts following technical scheme to realize: the utility model provides a flexbile gear for speed reducer, includes the flexbile gear wheel body, the flexbile gear wheel body be equipped with steel wheel complex ring gear, the terminal surface of flexbile gear wheel body is equipped with a plurality of cooperation archs, the cooperation arch be used for with driving medium transmission cooperation, the rotatory moment of torsion of transmission between cooperation arch and the driving medium.

Optionally, the flexbile gear be short cylindric, all be equipped with the cooperation arch on the both sides terminal surface of flexbile gear wheel body.

Optionally, the mating protrusion is cylindrical.

Optionally, the side surface of the matching protrusion is an arc surface or a connection extension of multiple arc surfaces.

Optionally, the position of the matching protrusion corresponds to the tooth tip on the gear ring.

Optionally, the end of the mating protrusion is the same shape as the gear teeth on the ring gear.

Optionally, the number of teeth of the gear ring is an integral multiple of the number of the matching protrusions.

Optionally, the matching protrusions are arranged in an even array along the flexible wheel body.

The utility model also provides a reduction gear, the reduction gear includes steel wheel and driving medium.

Optionally, the driving medium includes an output frame, the outer side surface of the output frame is provided with a driving rib, and the driving rib is arranged between the adjacent matching protrusions.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses an establish the flexbile gear in the reduction gear, the driving medium in the reduction gear passes through the card and goes into the clearance between the cooperation arch, not only can realize the transmission of rotation moment of torsion, still can not add the holistic axial length of device, is showing the length that has shortened the reduction gear, simultaneously with this application flexbile gear complex rotate the piece only need can go into the cooperation arch of going into, this driving medium size can not be greater than the flexbile gear size, consequently can reduce the axial height dimension demand of reduction gear to reduce the whole size of reduction gear.

Drawings

Fig. 1 is a schematic diagram of a flexspline in some embodiments of the present invention;

fig. 2 is a schematic diagram of a flexspline in some embodiments of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic view of the engagement of a driving member with a flexible gear according to some embodiments of the present invention;

FIG. 5 is a schematic illustration of a retarder configuration according to some embodiments of the present invention;

in the figure:

1. a flexible wheel body; 11. a mating protrusion; 12. a gap; 13. a ring gear; 131. a tooth tip;

2. a steel wheel;

3. a transmission member; 31. an output frame; 311. and (5) a transmission rib.

Detailed Description

The present invention will be further described with reference to fig. 1 to 5 and the detailed description thereof, and it should be noted that, in the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

The embodiment of the utility model provides a flexbile gear for speed reducer, as shown in figure 1, including flexbile gear wheel body 1, flexbile gear wheel body 1 be equipped with steel wheel 2 complex outer ring gear 13, if use the planet wheel in the reduction gear, then flexbile gear wheel body 1 still be equipped with planet wheel complex ring gear 13, the terminal surface of flexbile gear wheel body 1 is equipped with a plurality of cooperation archs 11, cooperation arch 11 is used for cooperating with 3 transmissions of driving medium, transmits rotatory moment of torsion between cooperation arch 11 and the driving medium 3, is equipped with clearance 12 between the cooperation arch 11, driving medium 3 and clearance 12 joint to support the application of force when rotating, the driving medium output uses the center of steel wheel 2 as the axial rotation moment of torsion of axle center, thereby realizes rotating output. The flexbile gear generally adopts the processing of plastic material to make, the metal flexbile gear is because the rigidity is big, the wall thickness is thin, with this flexbile gear difficult processing, and the plastic can be accomplished very easily by the mould shaping, in the cost-effective time, still have higher elastic modulus, transmission part 3 nevertheless does not influence the harmonic deformation of flexbile gear with clearance 12 joint when rotating, and the thickness of transmission part 3 overlaps or partly overlaps with the bellied thickness of flexbile gear, the whole thickness of device diminishes, thereby make the flexbile gear that this disclosure provided under the prerequisite that satisfies the harmonic reduction gear demand, axial length is less than traditional flexbile gear. Therefore, the length and the weight of the harmonic reducer are reduced, and the possibility of meeting the requirements of more equipment is provided.

In some embodiments, the flexible gear is in a short cylindrical shape, and the end surfaces of the two sides of the flexible gear body 1 are respectively provided with a matching protrusion 11, so that the two sides of the flexible gear can be connected with the transmission part 3, and further more transmission requirements can be met.

In some embodiments, as shown in FIG. 1, the mating protrusion 11 is cylindrical. The cylindrical matching bulge 11 is convenient to manufacture and form, is not easy to have errors, can meet the transmission requirement and can save the manufacturing cost.

In some embodiments, as shown in fig. 2 and 3, the side surface of the fitting protrusion 11 is an arc surface or a connection extension of multiple arc surfaces, and is designed to correspond to the side surface of the fitting protrusion 11 according to the shape of other connecting members, the fitting protrusion 11 is shaped, and the contact stress concentration between the connecting member and the fitting protrusion 11 is processed by a convex arc surface, so as to ensure the fatigue between the fitting protrusion 11 and the flexspline body 1.

As a further optimization, the position of the matching protrusion 11 corresponds to the tooth tip 131 on the gear ring 13, and more specifically, the end of the matching protrusion 11 is the same as the gear tooth shape on the gear ring 13, as shown in fig. 1, the axis of each cylindrical matching protrusion 11 and the straight line formed by the corresponding tooth tip 131 are both directed to the center of the flexible gear, as shown in fig. 2, the end of each shaped matching protrusion 11 is the same as the tooth tip 131 on the gear ring 13, and each matching protrusion 11 is disposed between two adjacent tooth tips 131, so that not only the strength of the tooth tip 131 can be enhanced by the matching protrusion 11 when the flexible gear is in transmission matching with the steel gear 2, but also the deformation resistance of the matching protrusion 11 can be ensured by the tooth tip 131, and the matching protrusion 11 and the tooth tip 131 are maintained fatigue with each other, so that the flexible gear still maintains very good precision after long-time transmission.

As an optimization, in some embodiments, the number of the gear teeth of the gear ring 13 is an integral multiple of the number of the matching protrusions 11, specifically, the matching protrusions 11 are uniformly arranged along the flexible gear body 1 in an array, so that the stress on the flexible gear can be uniformly distributed, the transmission is prevented from being affected by stress concentration, the stability of the flexible gear is improved, the fatigue strength of the flexible gear is improved, and the flexible gear has a longer service life.

The utility model also provides a reduction gear, as shown in figure 4 and as shown in figure 5 the reduction gear includes steel wheel 2 and driving medium 3. Specifically, the transmission member 3 includes an output frame 31, the output frame 31 is a circular disk, the output frame 31 is provided with transmission ribs 311, the pattern of the transmission ribs 311 is similar to that of spoke connection ribs, the transmission ribs 311 are arranged between adjacent matching protrusions 11, and the output frame 31 outputs axial rotation torque under the design. Adopt NGWN shape steel wheel 2 output when the flexbile gear, because steel wheel 2 exports with the meshing of flexbile gear wheel body 1, the axial length of steel wheel 2 is greater than the axial length of flexbile gear wheel body 1, the meshing height of output frame 31 is not higher than the protruding height of the protruding 11 of cooperation, consequently, axial length in this device can not be than the axial length of steel wheel 2 and stretch out too much, consequently, output frame 31 adopts spoke splice bar and the protruding 11 cooperation of cooperation, can also bear great moment of torsion when can not increase device axial length.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (10)

1. The utility model provides a flexbile gear for speed reducer, its characterized in that, includes the flexbile gear wheel body, the flexbile gear wheel body be equipped with steel wheel complex ring gear, the terminal surface of flexbile gear wheel body is equipped with a plurality of cooperation archs, the cooperation arch is used for cooperating with the driving medium transmission, and the rotatory moment of torsion of transmission between cooperation arch and the driving medium.

2. The flexible gear for the speed reducer according to claim 1, wherein the flexible gear is in a short cylindrical shape, and the end surfaces of both sides of the flexible gear body are provided with matching protrusions.

3. The flexspline for a speed reducer of claim 1, wherein the engagement projection is cylindrical.

4. The flexible gear for speed reducer of claim 1, wherein the side of the engaging protrusion is a curved surface or a plurality of curved surface connecting extensions.

5. The flexible gear for a speed reducer according to claim 1, wherein the engaging projection is located to correspond to a tooth tip on the ring gear.

6. The flexible gear for speed reducer according to claim 5, wherein the end of the fitting projection is the same shape as the gear teeth on the ring gear.

7. The flexible gear for a speed reducer according to claim 1, wherein the number of teeth of the ring gear is an integral multiple of the number of the fitting projections.

8. The flexspline for a speed reducer of claim 1, wherein the mating projections are arranged in a uniform array along the body of the flexspline.

9. A speed reducer comprising a flexspline for a speed reducer according to any of claims 1 to 8, the speed reducer comprising steel wheels and a transmission.

10. A decelerator according to claim 9, wherein the driving member includes an output carrier, and the outer side surface of the output carrier is provided with a driving rib, the driving rib being provided between adjacent ones of the engaging protrusions.

Images