CN2058219U

CN2058219U - Wave differential gear transmission mechanism

Info

Publication number: CN2058219U
Application number: CN 89208754
Authority: CN
Inventors: 陈凌峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-06-27
Filing date: 1989-06-27
Publication date: 1990-06-13

Abstract

The utility model relates to a novel variable-speed transmission mechanism which is designed according to a wave curve differential principle, belonging to rigid engaged transmission. The utility model comprises an exciter, a damper, a servomotor, an input shaft, an output shaft, and a machine body. Moving teeth are uniformly distributed on the reference circle of the servomotor. The reference circle of the exciter and the reference circle of the damper are provided with axial waveform teeth, and the transmission is realized through the engagement between the moving teeth and the waveform teeth. Compared with the existing transmission mechanism, the utility model has the advantages of small weight factor, easy fabrication, favorable transmission precision, and wide transmission ratio range.

Description

Wave differential gear transmission mechanism

The utility model is a kind of variable transmission mechanism of rigid engagement.

Defectives such as existing variable transmission mechanism as harmonic driving, planet cycloid transmission etc., all exists engaging member complex-shaped in varying degrees, makes difficulty, and mechanism's weight coefficient is big, and gear range is wide are subjected to various condition restriction in the application.

The utility model is a kind of brand-new driving mechanism, and it makes transmission pass through axial gear motion and realize according to ripple curve differential principle.Compare with existing variable transmission mechanism, its engaging member simple shape, weight coefficient is little, is easy to make, and mechanism's combination is flexible, and gear range is wide.

Realization of the present utility model is: be made up of six parts such as actuator, follower, damper, input shaft, output shaft, bodies according to the driving mechanism that requires to design.Actuator, follower, damper all place on the same axis.With the oscillating tooth of the uniform Zs of a tooth pitch Ls sphere or cross section rule, it can be axially free movable on the standard pitch circle of follower.The waveform tooth that axial uniform Zj, a Zb tooth depth equate on actuator and the damper standard pitch circle, tooth pitch is respectively Lj, Lb.The waveform tooth is that oscillating tooth is gone up the envelope that motion forms at ripple curve (pyramidal wave, trapezoidal wave, simple harmonic wave, trochoidal wave etc.), and follower is chien shih oscillating tooth and the engagement of waveform tooth in actuator, damper.The design primary condition is:

Zs（kLb－Ls）＝Lb

kZs－Zb＝Zj

In the formula: k=2 when k=1 during Ls＜Lb, Lb＜Ls＜2Lb

If with " J " expression actuator, " S " represents follower, " B " represents damper, and then the connection of this driving mechanism can have " JS ", " BS " (slowing down in the same way), " JB " (oppositely slowing down), " SJ ", " SB " (speedup in the same way), " BJ " six kinds of structures such as (oppositely speedups).With " JS " structure is example, and actuator is made driving link, and follower is made Passive part, and damper maintains static, and when input shaft drive actuator rotated with angular velocity Wj, the oscillating tooth that the waveform tooth on the actuator orders about on the follower axially moved.Damper then limits the axial motion of oscillating tooth and forces oscillating tooth to involve follower in contrast, and drive output shaft and rotate with angular velocity Ws, because Wj ≠ Ws, thereby finished the speed change transmission.

Manufacture cost of the present utility model significantly is lower than existing driving mechanism, waits the error that produces because mechanism self can remedy to make, and then has guaranteed transmission accuracy, the corresponding raising of its life-span.

Be example with " JS " structure below, the present invention will be further described.

Fig. 1 is the longitudinal sectional view of " JS " structure.

Fig. 2 is Figure 1A-A sectional drawing (circumference expansion).

Fig. 3 is the differential transmission principle figure of ripple curve.

Fig. 1 middle (center) bearing gland ［ 5 ］, ［ 16 ］, ［ 13 ］, bearing housing ［ 1 ］, ［ 17 ］ same support ［ 10 ］ join together.Damper ［ 12 ］ is fixed on the bearing housing ［ 17 ］, actuator ［ 8 ］ is fixed on the input shaft ［ 4 ］ by key ［ 3 ］, follower ［ 9 ］ is fixed on output shaft ［ 14 ］ by key ［ 2 ］, and input, output shaft are respectively charged into bearing housing ［ 1 ］, ［ 17 ］ by bearing ［ 6 ］, ［ 7 ］, ［ 15 ］.Oscillating tooth ［ 11 ］ can move freely on follower ［ 9 ］, and follower ［ 9 ］ is between actuator ［ 8 ］ and damper ［ 12 ］.

With reference to Fig. 3, oscillating tooth is distributed on curve b with tooth pitch Ls and goes up (this curve is a pyramidal wave), Ls also is the wavelength of curve b, oscillating tooth is respectively the envelope that moves and form on curve a, the c of Lj, Lb at wavelength, be the axial waveform tooth on actuator ［ 8 ］, damper ［ 12 ］ standard pitch circle, tooth pitch is Lj, Lb.Oscillating tooth is positioned on the intersection point of curve a, c all the time.

With reference to Fig. 2, when actuator rotates with angular velocity Wj, its waveform tooth orders about oscillating tooth ［ 11 ］ and axially moves, and the waveform tooth of damper ［ 12 ］ limits the axial motion of oscillating tooth ［ 11 ］, forcing oscillating tooth ［ 11 ］ to involve follower ［ 9 ］ rotates with angular velocity Ws, because of Wj ≠ Ws, and realized the speed change transmission.

Claims

1, a kind of variable transmission mechanism of rigid engagement, by actuator [8], follower [9], damper [12], input shaft [4] output shaft [14], body (comprising bearing gland) [5], [16], [13], bearing housing [1], [17], support six parts such as [10] are formed, it is characterized in that: actuator, follower, damper have the identical graduation circle, place side by side on the same axis, and follower are placed in the middle.

2, by the described variable transmission mechanism of claim 1, it is characterized in that:

A., the cylinder oscillating tooth ［ 11 ］ that Zs sphere or cross section rule are arranged on the standard pitch circle of follower ［ 9 ］.Tooth pitch is Ls.

B. oscillating tooth ［ 11 ］ envelope that forms that moves on the ripple curve is actuator ［ 8 ］, axial waveform tooth on damper ［ 12 ］ standard pitch circle, and the number of teeth is respectively Zj, Zb, and tooth pitch is Lj, Lb.

C. parameters such as the number of teeth of oscillating tooth on actuator, follower, the damper and waveform tooth, tooth pitch need meet following formula:

Zs（kLb－Ls）＝Lb

kZs－Zb＝Zj

In the formula: k=2 when k=1 during Ls＜Lb, Lb＜Ls＜2Lb

3, by claim 1,2 described variable transmission mechanisms, it is characterized in that if represent actuator with " J ", " S " represents follower, " B " represents damper, and then the connection of this driving mechanism can have " JS ", " BS " (slowing down in the same way), " JB " (oppositely slowing down), " SJ ", " SB " (speedup in the same way), " BJ " six kinds of structures such as (oppositely speedups).