CN2089996U

CN2089996U - Few perimeter differential planetary reducing machine

Info

Publication number: CN2089996U
Application number: CN 90226964
Authority: CN
Inventors: 梁蕃焕
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-12-27
Filing date: 1990-12-27
Publication date: 1991-12-04

Abstract

The utility model discloses a few perimeter differential planetary reducing machine, which belongs to the art of braking. The utility model mainly solves the problems that the input eccentric axis of the less teeth differential reducing machine is easily damaged and is unable to be repaired after abrasion. The few perimeter differential planetary reducing machine comprises a planet rim, an external rim, an input shaft, a cross shaft coupler, an output shaft and a mechanism which can automatically govern eccentricity. The planet rim is matched with the external rim by adopting a slot slope, and a square hrough hole is arranged on the bearing central axis of the planet rim. The input shaft is a square shaft, which is embedded in the square through hole. One side of the square shaft is provided with a deep borehole which can automatically govern eccentricity, and springs and steel balls are embedded in the deep borehole for strengthening the positive pressure and the slide fitting at the direction of the centrifugal effort. The few perimeter differential planetary reducing machine can adjust the parallel distance and can be used by repeated maintenance.

Description

Few perimeter differential planetary reducing machine

The utility model belongs to mechanically operated braking technique, more specifically says so to a kind of improvement of planetary speed reducer.

In the prior art, though few tooth difference speed reducer has a lot of advantages, but it is very high that processing technology and assembly precision require, under the influence that is subjected to centrifugal force and torsion, the input eccentric shaft very easily damages simultaneously, and this is the insoluble problem of few tooth difference speed reducer, so that can not apply to the occasion of input at a high speed, involute gear or cycloidal profile can not keep in repair after wearing and tearing in addition, and manufacture cost is also very high.

The purpose of this utility model mainly is to overcome the deficiency of above-mentioned speed reducer, provide a kind of simple in structure, the input speed scope is wide, and weares and teares after repair few girth difference planet speed-reducer that can normally use at planet wheel circle and outer rim, cost is low simultaneously, applied range.

The utility model is realized by following structural design, it comprises planet wheel rim (2), outer rim (3), input shaft (1), cross coupler (4), output shaft (5) and automatically regulate throw of eccentric mechanism etc. and partly form, on the bearing spindles (6) of planet wheel circle (2), establish a square through hole, its input shaft (1) is a square shaft, and be embedded in the square through hole, be provided with automatic adjusting throw of eccentric deep hole (7) in square shaft one side, be embedded with spring (8) and steel ball (9) in the deep hole (7), with the positive pressure of strengthening the centrifugal force direction be slidingly matched, leave simultaneously a compensate for clearance voluntarily in the lower end of deep hole (7), after the wearing and tearing that are subjected between action of centrifugal force and planet wheel rim (2) and the outer rim (3), the throw of eccentric of planet wheel rim (2) can obtain adjusting under action of centrifugal force automatically, planet wheel rim (2) can be remained be close to outer rim (3) to do the rolling revolving motion, planet wheel rim (2) adopts the groove inclined-plane to cooperate with outer rim (3), in outer rim (3) employing, following two wheel rims are by being bolted on the body fuselage, this structure helps processing and assembling, again can be by adjusting on the outer rim (3), parallel distance between following two wheel rims, can obtain different velocity ratios, if after planet wheel rim (2) and outer rim (3) wearing and tearing, changed gear ratio, only need the pad between the attenuate outer rim (3) slightly this moment, can normally use again.

Superiority of the present utility model is, can adjust the parallel distance of outer rim and planet wheel rim easily, be convenient to maintenance and repair use, the harmful effect that the while input shaft does not bear centrifugal force, thereby improve the working life of input shaft, and this mechanism causes this only to be 30% of few tooth difference speed reducer, and can develop and be used for mini motor vehicle and make automatic electrodeless variable-speed.

Below further combined with description of drawings theory structure of the present utility model and embodiment, accompanying drawing 1 is the utility model overall structure sectional view, accompanying drawing 2 is that accompanying drawing 1A-A is to input shaft throw of eccentric structure sectional view, the transmission principle of this speed reducer is when input shaft (1) high speed rotating, in the groove of outer rim (3), rolled by centrifugal action lower planet wheel rim (2), because girth difference principle makes output shaft (5) obtain the low speed transhipment opposite with input shaft (1) through cross coupler (4).Speed reducer is worked reliably.The most important thing is: planet wheel rim (2) contacts between outer rim (3) can not produce slip.Use the mechanics principle analysis, be subjected to centrifugal action (m * ω ²* γ) planet wheel rim (2) is done plane planet rotation motion in the groove of outer rim (3).Two normal reactions that produced are when output shaft (5) produces bigger groove face frictional force under load condition.(be convenient to calculate to adopt equivalent coefficient of friction 1/ (sim β) f, if adopt the groove inclined-plane of β=15 ° when example, sim β=2.2588 produce groove face frictional force and approximately be 4 times of planar friction power so) makes frictional force (m * ω when design with when making ²* γ * 1/ (sim β) f) greater than load torsion, (design also needs to calculate according to factors such as torques certainly) makes planet wheel rim (2) keep rolling in the outer rim skewed slot.Just guarantee the speed reducer proper functioning.According to the ripe theory of centrifugal force and groove face friction, its application example, in the extensive use of mechanical industry, (as centrifugal clutch, steel band and v belt transmission etc.) just is not difficult to design and manufacture practical few girth difference planet speed-reducer.

Claims

1, a kind of few girth difference planet speed-reducer, comprise the planet wheel rim, outer rim, input shaft, cross coupler, output shaft and automatically regulate throw of eccentric mechanism etc. and partly form, the bearing spindles that it is characterized in that the planet wheel rim is provided with a square through hole, input shaft is a square shaft, and is embedded in the square through hole, is provided with automatic adjusting throw of eccentric deep hole in square shaft one side, be embedded with spring and steel ball in the deep hole, leave simultaneously a compensate for clearance voluntarily in the lower end of deep hole, the planet wheel rim cooperates its groove angle of tilt β=10 ° of-45 ° of scopes with outer rim employing groove inclined-plane.

2, few girth difference planet speed-reducer according to claim 1 is characterized in that outer rim adopts upper and lower two wheel rims to form, and upper and lower two wheel rims are by being bolted on the body fuselage.