CN2174593Y

CN2174593Y - Compound oscillating small teeth difference drive

Info

Publication number: CN2174593Y
Application number: CN 93244454
Authority: CN
Inventors: 董申
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-11-10
Filing date: 1993-11-10
Publication date: 1994-08-17
Anticipated expiration: 2003-11-10

Abstract

The utility model belongs to a compound oscillating small teeth difference transmission device using four connecting rods in mechanical transmission devices. At least two eccentric shafts are arranged on a planetary wheel which is engaged with an annular gear by small teeth difference to drive the planetary wheel to swing in uniform speed for enabling the mechanism to achieve aim of speed change. Simultaneously, ly, the project of using a balance wheel and adding the eccentric shafts enables the motion of the mechanism to achieve reasonableness and stability. The input and output shafts of the mechanism can be completely concentric, and the utility model has the advantages of large speed ratio, small size, reasonable structure, etc.; the transmission of the mechanism is reversible type.

Description

Compound oscillating small teeth difference drive

The utility model belongs to the compound swing gearing with small teeth differenc of using in the mechanical transmission of parallel four connecting rods.

In mechanical transmission, for boundary dimension and weight that reduces device and the velocity ratio that increases its reducing gear, the topmost method of employing is exactly that the common transmission that will have the dead axle line gear changes Gear Planet Transmission into.And the principal mode of involute planetary gear transmission is the Gear Planet Transmission of K-H-V type.This mechanism has compact structure, in light weight, characteristics such as efficient is high, bearing capacity is big.Because planet wheel and output shaft generally all adopt the W output mechanism not on same center line.All adopt sliding friction and the major defect of W output mechanism is a transmission part, requirement on machining accuracy is higher, assembles also more complicated.In order to improve the precision of transmission, need the pair of corresponding planet wheel and work simultaneously in addition, this has just increased the difficulty of processing and assembling.China Patent No. is to use a ring gear of at the uniform velocity swinging to be meshed with output shaft gear for 92220731.3 utility model patent provides a kind of " monodentate circle speed changer ", realizes few tooth difference transmission.But because the volume of this driving mechanism is relatively big, input and output axle decentraction is so applying of this technology is subjected to certain restriction.

The utility model is a kind of simple in structure, easily manufactured, the compound swing gearing with small teeth differenc of parallel four connecting rods that input and output shaft is concentric for overcoming that the deficiencies in the prior art design.

The utility model is realized by following measure.The utility model is that a casing that studs with ring gear is arranged, on the central axis of ring gear, there is one planetary eccentric shaft is housed, this planetary pinion and ring gear are by the transmission that is meshed of few tooth difference, second eccentric shaft that parallels with first eccentric shaft is housed on the planet gear mass, the throw of eccentric of this eccentric shaft equates that with first eccentric shaft the eccentric direction during assembling is identical with first.The bearing of two eccentric shafts is fixed on the same securing supports, forms a parallel four-bar linkage jointly.When first eccentric shaft rotated by certain direction, second eccentric shaft was with same angular velocity rotation.The planet wheel center line then rotates with unequal angular velocity, and the planet wheel body is then at the uniform velocity swung around the ring gear center line, promptly rotates to identical direction with the angular velocity of few tooth difference with its ring gear that is meshed.In order to consider structure and stressed factor such as rationally, two or more eccentric shafts that parallel with first eccentric shaft can be installed on planet wheel, its position can be arranged arbitrarily as required, but throw of eccentric must equate.First eccentric shaft can be not concentric with ring gear.In order to overcome the dead point of mechanism, on the basis of second eccentric shaft, increase at least one eccentric shaft, the setting of this eccentric shaft is with the optimum scheme that is arranged as of symmetry.Also can be arranged to a rare balance plate parallel with planet wheel, balance plate motion make a concerted effort all the time should with the opposite sign but equal magnitude of the planet wheel motoricity of swing.The transmission of this mechanism is a reversible.

Be applied to a embodiment on the electric wire hoist below in conjunction with description of drawings the utility model.

Accompanying drawing is a structure principle chart of the present utility model.(1) is ring gear among the figure; (2) be eccentric shaft; (3) be stabilizer; (4) be eccentric shaft; (5) be eccentric shaft; (6) be planet wheel; (7) be electric wire hoist roller (casing).

In electric wire hoist roller (casing) (7), stud with ring gear (1); On the center line of ring gear (1), an eccentric shaft (4) is arranged; Planetary pinion (6) is contained on the eccentric shaft (4), and is meshed with ring gear (1).Eccentric shaft (5) is contained on the planetary pinion (6), and is parallel with eccentric shaft (4) and certain distance arranged, and its throw of eccentric equates.For the balance in guaranteeing to move with overcome the dead point of kinematic pair, increase a stabilizer (3) and eccentric shaft (2).Stabilizer (3) supports by eccentric shaft (2) and eccentric shaft (5).The fulcrum of eccentric shaft (2), (4), (5) is installed on the fixture.The eccentric direction of the throw of eccentric of three eccentric shafts on planet wheel (6) and stabilizer (3) is 180 ° angle.According to the needs of mechanism and motion state, the quantity of stabilizer and eccentric shaft can be set suitably.

The utility model has the advantages that power shaft and output shaft can be arranged on the same center line, have the characteristics such as gearratio is big, rational in infrastructure, simple, easily manufactured. Can be widely used in the gear of various mechanical devices.

Claims

1, a kind of compound swing gearing with small teeth differenc, form by ring gear, planet wheel, eccentric shaft, balance plate etc., it is characterized in that: with planet wheel that ring gear is meshed with few tooth difference on, at least by the motion mode of two eccentric shafts with parallel four connecting rods, drive is at the uniform velocity swung it, and one of them eccentric shaft and ring gear are on same center line.

2, compound swing gearing with small teeth differenc according to claim 1, it is characterized in that: the eccentric shaft on the said planet wheel is not concentric with ring gear, and arranges arbitrarily as required.

3, compound swing gearing with small teeth differenc according to claim 1 is characterized in that: have a balance plate parallel with planet wheel at least, the setting of balance plate should make the opposite with equal and opposite in direction, the direction of swinging the planet wheel motoricity all the time with joint efforts of its motion.

4, compound swing gearing with small teeth differenc according to claim 1 is characterized in that: for overcoming the dead point of mechanism, on the basis of original two eccentric shafts of planet wheel, increase at least one eccentric shaft, the setting of eccentric shaft is with the optimum scheme that is arranged as of symmetry.