CN207583967U - Flexbile gear and harmonic speed reducer - Google Patents

Abstract

The utility model discloses a kind of flexbile gear and harmonic speed reducers.Flexbile gear, including ontology, the ontology is cylindrical in shape, the ontology has nozzle end and cylinder bottom end, it is provided on the outer wall at the nozzle end for the external tooth of the interior tooth engagement with firm gear, from the position away from nozzle end certain distance to the cylinder bottom end, the thickness of the barrel of the ontology constantly increases, and the outer wall of the ontology remains cylindrical surface.When wave producer is rotated so that flexbile gear to be driven to rotate, power and deformation are transferred to a bottom end by flexbile gear from nozzle end, since the barrel that the utility model will be close to one end ontology of a bottom end is arranged to the constantly increased structure of thickness, so as to enhance the rigidity of this section, reduce the deformation extent for being transferred to a bottom end, it is particular enable to alleviate irregular deformation to being connected to the load of a bottom end and the impact in interconnection hole, fastener, make stable drive between flexbile gear and load, extend the service life of the associated components of flexbile gear and load input terminal.

Description

Flexbile gear and harmonic speed reducer

Technical field

The utility model relates to the flexbile gear of technical field of mechanical transmission more particularly to a kind of harmonic speed reducer and with this is soft The harmonic speed reducer of wheel.

Background technology

Harmonic speed reducer with very large transmission ratio because being widely used in mechanical transmission fields, in general, harmonic speed reducer packet Include firm gear, flexbile gear and wave producer.Wherein, firm gear is actually a very big ring gear of rigidity；Flexbile gear is cylindrical in shape, and by The smaller material of rigidity is made, and external tooth is formed on the outer wall at the nozzle end of flexbile gear, the nozzle end of flexbile gear is stretched into firm gear, external tooth For the interior tooth engagement with firm gear；Wave producer is elliptic cylindrical shape, stretches to the nozzle end of flexbile gear, when wave producer is by power When mechanism drives and rotates, the external tooth of flexbile gear corresponding with the long axis of wave producer constantly with the interior tooth engagement of firm gear by making Wave producer driving flexbile gear rotation.

Applicant has found harmonic reduction of the prior art during manufacture, assembling and using harmonic speed reducer The flexbile gear of device at least has as a drawback that：

Since the length of flexbile gear in the axial direction is much larger than firm gear, and the rigidity of flexbile gear is relatively low, this causes when by engine During the larger torsion of structure, after torsion is transferred to the cylinder bottom end of flexbile gear, a bottom end can be made to generate a moderate finite deformation, when torsion is in higher water During flat variation, the deformation of cylinder bottom end can become very irregular, and this irregular deformation meeting serious impact is connected to it negative It carries and for connecting the connecting hole of load, fastener.

Utility model content

For the above-mentioned technical problems in the prior art, the embodiment of the utility model provides a kind of flexbile gear and humorous Wave retarder.

In order to solve the above technical problems, the embodiment of the utility model the technical solution adopted is that：

A kind of flexbile gear, including ontology, the ontology is cylindrical in shape, and the ontology has nozzle end and cylinder bottom end, the nozzle It is provided on the outer wall at end for the external tooth of the interior tooth engagement with firm gear, from the position away from nozzle end certain distance to described Cylinder bottom end, the thickness of the barrel of the ontology constantly increases, and the outer wall of the ontology remains cylindrical surface.

Preferably, the flexbile gear further includes taper core, the taper core from the nozzle end stretch to the cylinder bottom end with Support is close to one section of ontology of the cylinder bottom end.

Preferably, a plurality of axially extending fin is provided on the hole wall of one section of endoporus of the cylinder bottom end, it is a plurality of Fin is circumferentially uniformly distributed；It is offered on the circumferential surface of the taper core a plurality of for the corresponding a plurality of elongated slot for being embedded the fin.

Preferably, the flexbile gear further includes terminal pad, and the side of the terminal pad is provided with sheath, and the sheath is sheathed on The cylinder bottom end is simultaneously fitted close with the outer wall of the cylinder bottom end, by wearing the terminal pad, the cylinder bottom end and described The bolt of taper core and be fixedly connected with the terminal pad, the cylinder bottom end and the taper core.

Preferably, the end face of the taper core has preset clearance with the cylinder bottom end.

The invention also discloses a kind of harmonic speed reducers, and including firm gear, wave producer, the harmonic speed reducer also wraps Include above-mentioned flexbile gear.

Compared with prior art, the flexbile gear of the utility model and the advantageous effect of harmonic speed reducer are：When wave producer turns It is dynamic with when driving the flexbile gear to rotate, power and deformation are transferred to a bottom end by flexbile gear from nozzle end, since the utility model will be close to The barrel of one end ontology of cylinder bottom end is arranged to the constantly increased structure of thickness, so as to enhance the rigidity of this section, reduces biography The deformation extent of a bottom end is handed to, is particular enable to alleviate load and interconnection of the irregular deformation to being connected to a bottom end Hole, the impact of fastener make stable drive between flexbile gear and load, extend the associated components of flexbile gear and load input terminal Service life.

Description of the drawings

Fig. 1 is the structure diagram of flexbile gear that the utility model one embodiment provides.

Fig. 2 is the sectional view along A-A of Fig. 1.

In figure：

10- ontologies；11- nozzles end；12- bottom ends；13- external tooths；14- elongated slots；20- taper cores；21- fins；30- connections Disk；31- sheaths；32- mounting holes；40- bolts；50- preset clearances.

Specific embodiment

It is below in conjunction with the accompanying drawings and specific real for those skilled in the art is made to be better understood from the technical solution of the utility model Mode is applied to elaborate to the utility model.

As depicted in figs. 1 and 2, the embodiment of the utility model provides a kind of flexbile gear, and including ontology 10, ontology 10 is in cylinder Shape, ontology 10 have nozzle end 11 and cylinder bottom end 12, are provided on the outer wall at nozzle end 11 for the interior tooth engagement with firm gear External tooth 13, from the position away from 11 certain distance of nozzle end to cylinder bottom end 12, the thickness of the barrel of ontology 10 constantly increases, and ontology 10 outer wall remains cylindrical surface.

As described above, when wave producer is rotated so that flexbile gear to be driven to rotate, flexbile gear is by power and deforms from nozzle end 11 are transferred to a bottom end 12, and since the utility model will be close to the barrel of one end ontology 10 of a bottom end 12, to be arranged to thickness continuous Increased structure so as to enhance the rigidity of this section, reduces the deformation extent for being transferred to a bottom end 12, is particular enable to alleviate not Rule deformation makes to pass between flexbile gear and load to being connected to the load of a bottom end 12 and the impact in interconnection hole, fastener It is dynamic steady, extend the service life of the associated components of flexbile gear and load input terminal.

To further prevent displacement transfer to cylinder bottom end 12, flexbile gear further includes taper core 20, and taper core 20 is from nozzle end 11 A bottom end 12 is stretched to support one section of ontology 10 close to cylinder bottom end 12.Specifically, make the inner wall of taper core 20 and ontology 10 It is fitted close.In this way, taper core 20 has preferable supporting role to ontology 10, it is therefore prevented that ontology 10 is at it perpendicular to axial direction It deforms on section.

To prevent one end ontology 10 close to cylinder bottom end 12 from twisting deformation, one section of endoporus in close cylinder bottom end 12 A plurality of axially extending fin 21 is provided on hole wall, a plurality of fin 21 is circumferential uniformly distributed；It is offered on the circumferential surface of taper core 20 more Item is for the corresponding a plurality of elongated slot 14 for being embedded fin 21；Flexbile gear further include terminal pad 30 (terminal pad 30 offer for load The mounting hole 32 of connection), the side of terminal pad 30 is provided with sheath 31, sheath 31 be sheathed on a bottom end 12 and with cylinder bottom end 12 Outer wall is fitted close, and makes terminal pad 30, cylinder bottom end by wearing the bolt 40 of terminal pad 30, cylinder bottom end 12 and taper core 20 12 and taper core 20 be fixedly connected.In this way, the elongated slot 14 on taper core 20 moves in the circumferential for limiting fin 21, so as to Limit torsion of the ontology 10 in this section.

For that can adjust the tight ness rating of taper core 20 and the inner wall of ontology 10, end face and the cylinder bottom end 12 of taper core 20 have Preset clearance 50, after being used for multiple times, by rotating bolt 40 to reduce preset clearance 50, so as to increase taper core 20 with The tight ness rating of the inner wall of ontology 10.

The invention also discloses a kind of harmonic speed reducer, the harmonic speed reducer include firm gear, wave producer and on The flexbile gear stated.

Above example is only the exemplary embodiment of the utility model, is not used in limitation the utility model, this practicality is new The protection domain of type is defined by the claims.Those skilled in the art can be in the essence and protection domain of the utility model It is interior, various modifications or equivalent replacements are made to the utility model, this modification or equivalent replacement also should be regarded as falling new in this practicality In the protection domain of type.

Claims (6)

1. a kind of flexbile gear, including ontology, the ontology is cylindrical in shape, the ontology has nozzle end and cylinder bottom end, the nozzle end Outer wall on be provided with for the external tooth of the interior tooth engagement with firm gear, which is characterized in that from away from nozzle end certain distance Position to the cylinder bottom end, the thickness of the barrel of the ontology constantly increases, and the outer wall of the ontology remains cylindrical surface.

2. flexbile gear according to claim 1, which is characterized in that the flexbile gear further includes taper core, and the taper core is from institute It states nozzle end and stretches to the cylinder bottom end to support one section of ontology close to the cylinder bottom end.

3. flexbile gear according to claim 2, which is characterized in that set on the hole wall of one section of endoporus of the cylinder bottom end There is a plurality of axially extending fin, a plurality of fin is circumferentially uniformly distributed；It is offered on the circumferential surface of the taper core a plurality of embedding for corresponding to If a plurality of elongated slot of the fin.

4. flexbile gear according to claim 3, which is characterized in that the flexbile gear further includes terminal pad, and the one of the terminal pad Side is provided with sheath, and the sheath is sheathed on the cylinder bottom end and is fitted close with the outer wall of the cylinder bottom end, by wearing State terminal pad, the cylinder bottom end and the taper core bolt and make the terminal pad, the cylinder bottom end and the taper Core is fixedly connected.

5. flexbile gear according to claim 3, which is characterized in that the end face of the taper core has reserved with the cylinder bottom end Gap.

6. a kind of harmonic speed reducer, including firm gear, wave producer, which is characterized in that the harmonic speed reducer is further included such as right It is required that the flexbile gear in 1 to 5 described in any one.