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The flexible bearing is the key component of the harmonic reducer
Flexible bearing which causes controlled elastic deformation of the flexible wheel. Its performance and lifetime will significantly affect the normal operation of the harmonic reducer. In order to improve the life and operating performance of the flexible bearing, its load distribution needs to be calculated. Based on the thin-walled ring theory, the relationship between the radial deformation of the triple force ring and the load is derived. Then a three-force ring superposition model is established for fast calculation of the load distribution of elliptical cam flexible bearings in harmonic reducers. The validity of the proposed model is demonstrated by comparison with the static analysis model. In this paper, the effects of ball number and external load on load distribution are investigated, and the three-force ring superposition method is used to study the radial deformation and bending normal stress of the external ring. Based on the deformation of the three-force ring, the deformation characteristics and bending normal stress distribution of the outer ring of the flexible bearing are analyzed, and several regular results are found.
Harmonic gear reducers are widely used in industrial robots, aerospace, optics and other high-end fields
The failure of harmonic gear reducers is mainly caused by the damage of flexible bearings and flexible wheels of thin-walled wear parts. In order to study the contact mechanics characteristics of flexible parts such as flexible bearings and flexible wheels in harmonic gear reducers, the contact mechanics model of flexible bearings in harmonic gear reducers, the differential equation of vibration of flexible wheels and the finite element model of each part are established. Based on the established harmonic gear reducer model, the effects of the flexure wheel cylinder length and cylinder bottom thickness on the stress of the flexure wheel are discussed respectively, and the motion characteristics of the flexure bearing are studied. Meanwhile, the spatial distribution of the flexure wheel displacement and the axial vibration response of the flexure wheel are studied. The correctness of the model established in this paper is verified by experiments. The results show that the increase of cylinder length can improve the stress of the flexure wheel of the harmonic gear reducer; the wall thickness of the cylinder bottom mainly affects the stress of the bottom of the flexure wheel, while it has little effect on the stress of the tooth ring and the glossy cylinder. Along the direction of the flexure wheel axis, the radial displacement, circumferential displacement and angular displacement increase linearly with the increase of the axial distance between the cylinder and the bottom. When the excitation frequency is high, the vibration mode of the flexure wheel shell is mainly axial vibration.
Flexible bearings are an alternative to conventional mechanical bearings.
In the latter case, motion is obtained by sliding or rolling motion between two (or more) entities and the resulting mechanical nonlinearity (friction, front sliding displacement ……), whereas flexible bearings depend on the elastic properties of the substance and therefore have several advantages:
-high precision
-No friction
-No hysteresis
-No need for lubrication
-No risk of interference
-No bounce
-Possibility of monolithic manufacturing, thus “designed for no assembly”
-Cost reduction.
Common types of flexible bearings
About LKPB Bearing Company
Luoyang LIKE Precision Machinery Co., Ltd – LKPB®, Located in Luoyang, China, Established in 2013 with a registered capital of 5 million, We are a professional bearing manufacturer.
LKPB strictly follows the ISO9001 quality system requirements for product quality control, we have a strong technical team to accept processing of non-standard precision bearings of P5, P4, P2 and VSP level of accuracy. The products inner diameter size range is φ20mm-φ2000mm.
We have established long term co-operation with a number of the world’s leading machine tool and robotics companies, the products can completely replace of INA/IKO/THK/FAG/SKF/KAYDON and other brands. We believe that cooperating with us will exceed your expectations.
- Rotary Table Bearings ( YRT, YRTC, YRTS, YRTM, ZKLDF Series) ;
- Cross Roller Bearings ( RA/RA-C, RAU, RB, RU, RW, RE, SX, XU, XV, XSU, XR/JXR, CRB/CRBC, CRBF/CRBFV, CRBH/CRBHV, CRBS/CRBSV, CRBT/CRBTF Series);
- Thin Section Bearings ( KAA, KA, KB, KC, KD, KF, KG, JHA, JA, JB, JG, JU Series);
- Robot Reducer Bearings (CSF/CSG, SHF/SHG, CSD Series, RV Reducer Bearings and Flexible Bearings F, 3E Series);
- Angular Contact Ball Bearings ( 718, 719, 70, 72, 2344/2347 Series);
- Ball Screw Support Bearings ( ZKLF/ZKLN, ZARF/ZARN Series);
- Slewing Ring ( Cross Roller, Four-Point Contact, Eight-Point Contact Same Path, Eight-Point Contact Different Path, Three-row roller and Flanged Series);
- Hollow Rotary Platform Bearings ( ZK Series).
For expert guidance in meeting your specific requirements, reach out to our knowledgeable team. Experience firsthand how our precision solutions can elevate your machinery’s efficiency and durability. Contact us today!
LKPB With more than 10 years of production experience
Supporting OEM service; 50 days return service; 7*24 hours technical support; Accept non-standard customization; Maximum 24 months product warranty
