CN2081013U

CN2081013U - Harmonic speed reducer

Info

Publication number: CN2081013U
Application number: CN 90219572
Authority: CN
Inventors: 姚传志
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-10-26
Filing date: 1990-10-26
Publication date: 1991-07-17

Abstract

The utility model relates to a scattered tooth harmonic speed reducer which is form by the improvement that a flexible gear in the original harmonic speed reducer is improved into a scattered tooth structure. The ellipsoid edge of the speed reducer, which is along a wave generator is a circle of boss, the boss is used for shifting the scattered tooth sliding in radial direction along a grooved pulley, a flexible bearing is arranged in the scattered tooth and the boss, the scattered tooth is engaged with a circular spline, and the grooved pulley and a casing are fixed. The scattered tooth structure keeps the advantages of smooth transmission, low noise and large transmission ratio of the original flexible gear speed reducer, the scattered tooth structure also overcomes the defects of short service life and unsuitability of large module gears, and accordingly, the utility model can achieve the effects of small volume and large output torque.

Description

Harmonic speed reducer

The utility model relates to a kind of retarder, is a kind of diffusing slot ripples retarder.

The moment of torsion transmission of existing harmonic speed reducer is to circulate and promote to be located at the flexbile gear that ripple is given birth to the device outer ring by being fixed on elliptical wave generator on the input shaft, make tooth on the flexbile gear by the movement locus of wave-generator and the firm gear teeth meshing that is fixed on the output shaft, to reach the purpose of transmitting torque.But, the flexbile gear tooth that not only requires during flexbile gear work to be in ellipse generator major axis place is taken turns the teeth groove engagement fully and just, and the flexbile gear that requires simultaneously to be in the ellipse short shaft place breaks away from firm wheel teeth groove fully, and finish above-mentioned functions fully by the elastic reaction of flexbile gear itself, promptly the flexbile gear wall of fixing tooth is done very thinly.Like this, because the stress of tooth root when being in work concentrates, and the tooth base plate is very thin, when flexbile gear uses not only the life-span low, and output torque also is restricted.

The purpose of this utility model is to provide a kind of diffusing slot ripples retarder, and it is in existing harmonic speed reducer, and the elasticity flexbile gear is improved to the diffusing toothing of rigidity, to reach ability that increases the retarder output torque and the purpose that improves the speed change gear life-span.

The purpose of this utility model is achieved in that still fixing elliptical wave generator of this input shaft of speed reducer end, the output axle head is toothed firm wheel equally, and the characteristics of this structure are: the ellipsoid edge along wave-generator is a circle boss, stirs the diffusing tooth that radially slides along the sheave work with this boss.In order to change the friction mode of boss and diffusing tooth, diffusing tooth be provided with flexible bearing between boss contacts, loose tooth and wheel engagement just, sheave and housing are fixed.

Narrate embodiment of the present utility model according to accompanying drawing below.

Fig. 1 is the retarder sectional view of just having taken turns the band internal tooth.

Fig. 2 is the sectional view along Figure 1A-A line.

Fig. 3 is the sectional view of just having taken turns the band external tooth.

Fig. 4 is the sectional view along Fig. 3 B-B line.

Shown in Fig. 1-2: this diffusing slot ripples retarder comprises housing 1, coupling 2 and 3, centripetal thrust force axle 4 and 5, torque output shaft 6, torque input shaft 7 and is fixed on the firm tube 8 of axle on 6, with the fixing firm wheel 9 that has internal tooth of firm tube 8.For lubricated, at the axle head of axle 7 with just be respectively equipped with oil skipper 10,11 on the cylindrical of wheel 9.Sheave 12 is a ring-type, and its cylindrical can change with hull shape, but interior circle must be round, is provided with several radial radial grooves on sheave 12, and sheave 12 is fixing with housing 1.Wave-generator 13 is still an elliptic wheel, and elliptic wheel is fixed on the axle 7, is the boss of the high out-of-plane of a circle at the ellipsoid edge of elliptic wheel, and the elliptic wheel cylindrical is provided with flexible bearing 14, and the inboard of boss also is provided with flexible bearing 15.The tooth 16 that looses is similar to " T " word of traverses, the outside of diffusing tooth is a crown, it plays and the internal tooth engagement of just taking turns 9, loose at the bottom of the inboard of tooth is tooth, it withstands on the flexible bearing 14, and the side of the tooth that looses is a slide block, and its limits the tooth that looses can only do reciprocatingly sliding radially along sheave 12, and the side lower part of the tooth that looses is a hook, and it hangs on the flexible bearing 15.The working principle of the diffusing toothing of rigidity is: when input shaft 7 drives wave-generators 13 rotations, because the different tracks that elliptic wheel is produced in rotary course, just make that each the diffusing tooth that is in different tracks is in different stresses, the diffusing tooth that for example moves on oval two major axis will be meshed in the internal tooth that propelling has just been taken turns fully, and the diffusing tooth that is in minor axis will be taken back by boss, make it break away from engagement fully, like this, take turns rotation to flexible bearing and by the mode that push away and draw of this bearing by ellipse to the tooth that looses, add the number of teeth amount of loosing and be less than this velocity ratio relation of firm wheel internal tooth quantity, make the tooth that looses gradually continue the transmission of grinding one's teeth under the state that meshes, and then realize the effect of its deceleration and transmitting torque with firm wheel.

Diffusing slot ripples retarder shown in Fig. 3-4 and Fig. 1-2's is basic identical, its difference is: just taken turns 9 external tooths that have, therefore, diffusing toothing is to realize that by the oval rail of wave-generator 13 itself and the gradually continuous of firm wheel mesh along the cylindrical of just taking turns 9, its sheave 12 still has radial groove, correspondence is provided with a diffusing tooth 16 in each chute, the inboard of diffusing tooth is a crown, the middle part has recess, boss on flexible bearing 14,15 and the wave-generator 13 all crouches into and to loose in the recess of tooth 16, and boss is clipped in the middle of the two bearings.Its transmission principle is identical with Fig. 1-2's, the difference of tooth in wheel outer gearing just or engagement in firm wheel of just loosing.For reducing the temperature rise of lubricant oil in the relatively large retarder, in housing 1, also be provided with the water pipe 17 of scurrying interlinked with the outside.

The diffusing toothing of rigidity of the present utility model reaches the big characteristics of gearratio except the stable drive that has kept former flexbile gear harmonic speed reducer, noise hang down, the service life that has overcome again flexbile gear is low, be unsuitable for the shortcoming of large module gear, make it reach little and the effect that output torque is big of volume.

Claims

1, a kind of diffusing slot ripples retarder comprises housing, torque input shaft, output shaft, just takes turns and oval-shaped wave-generator, it is characterized in that: the ellipsoid edge along wave-generator is a circle boss, stir the diffusing tooth that radially slides along the sheave work with this boss, between diffusing tooth and boss, be provided with flexible bearing, the tooth that looses meshes with firm wheel, and sheave and housing are fixed.

2, diffusing slot ripples retarder according to claim 1, it is characterized in that: sheave is a ring-type, and sheave is provided with several radial chutes, and correspondence is provided with a diffusing tooth in the every chute.

3, diffusing slot ripples retarder according to claim 1 and 2 is characterized in that: be band toothing in wheel tyre tooth or the wheel with the firm wheel of diffusing tooth engagement.

4, diffusing slot ripples retarder according to claim 3 is characterized in that: the T font that diffusing tooth is, and its outside is a crown, and the inboard is a tooth root, and sidepiece is slide block and has hook at side lower part, or the inboard of diffusing tooth is crown, and the middle part has recess.