CN103016677A

CN103016677A - Bearing-like reducer

Info

Publication number: CN103016677A
Application number: CN2011102878500A
Authority: CN
Inventors: 魏九洲
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-26
Filing date: 2011-09-26
Publication date: 2013-04-03

Abstract

The invention discloses a bearing-like reducer which can be used for reducing speed and can also be used as a bearing. The bearing-like reducer adopts hypocycloid drive and all the hypocycloidal teeth, balls or pin rollers are engaged in pure rolling drive all the time and do not bend or slide like involute teeth. Therefore, the bearing-like reducer can have high speed and bear heavy load, has no noise, high efficiency, long service life and big transmission ratio of above one hundred, and can be used for step-up drive, and the weight and volume of the reducer are not more than one percent of the weight and volume of a conventional reducer. The bearing-like reducer has a similar structure and size with a bearing and the difference is that the outer ring of the bearing is changed to be a hypocycloidal curved surface, the inner ring is changed to be a crankshaft, and two rows of balls which are staggered are installed on a retainer. The bearing-like reducer is low in manufacturing cost, high in profit, long in service life, and wide in application range, can be used in large quantity and is suitable for large-scale production. Therefore, the bearing-like reducer is an ideal new product for a bearing plant.

Description

The bearing speed reducer

Technical field; A kind of speed reducer-bearing speed reducer, it belongs to cycloid speed reducer field and field of bearings simultaneously.

Technical background: involute gear has been dominated mechanical transmission for a long time, but it is in high mechanical efficiency, at a high speed, heavy duty, big speed ratio, ultra-light-weight, the ultra-small volume aspect demonstrates its deficiency significantly.This is that only six or seven tooth is in work for internal gear because involute tooth exists between cog to slide and tooth is crooked, and the degree of overlapping of tooth is too little, and external gear only has 1.2 teeth in work, and other teeth are all having days off by turns.Therefore, people urgently find a kind of new transmission to overcome the deficiency of involute gear, and it is less to produce thus volume, the speed reducer that weight is lighter.

People have at first invented the curtate epicycloid transmission, and people want to realize slowing down by the pure rolling between pin tooth and the curtate epicycloid, cut but the top occurred in practice, and the problems such as interference that is to say, do not have this curtate epicycloid.Simultaneously, the pin tooth of curtate epicycloid transmission is easily crooked, and the pin transmission power is too little, and driving mechanism is unreasonable.

Summary of the invention: the present invention is to locate a kind of top that do not exist and cuts, and interferes, and between cog slides, and tooth is crooked, the half tooth is arranged in work, can direct drive rational mechanism and the speed reducer of curve.And stable drive, noise free.Ultralight extra small again.

I have found this curve, am named as hypocycloid, and it is different from the hypocycloid in the mathematics, but the hypocycloid in the mechanical engagement transmission, the equation of two kinds of curves is fully different.Meanwhile, I have finished the theory of complete hypocycloid transmission, design, and how much calculating, intensity is calculated and processing method.

The example that directly applies to speed reducer of hypocycloid transmission principle is patent-three-ring hypocycloid reducer (number of patent application-2009101487362).Through further research discovery, the mechanism of three-ring hypocycloid reducer can also be simplified to more senior patented product-bearing speed reducer.It is accomplished like this, at first three bent axles with three-ring hypocycloid reducer merge on the middle bent axle, on the bent axle in the middle of again the bearing on three bent axles being merged to, then bearing and needle roller are merged together, become rolling element, rolling element can make ball, also can be cylindrical rollers, rolling element is installed in the eccentric grove of bent axle and in the retainer, outermost is installed outer shroud.The inboard of outer shroud processes the hypocycloid curved surface.Eccentric grove is made pure rolling by rolling element transmission hypocycloid curved surface and is rotated.

Description of drawings: Fig. 1 is the upper general assembly drawing embodiment that snap ring (B) is installed of retainer (2), and Fig. 2 is bent axle, and Fig. 3 is outer shroud, and Fig. 4 is retainer.Fig. 5 is the erection drawing that snap ring (B2) is installed in the outer shroud (3), and Fig. 6 is that snap ring (B2) is installed in the erection drawing on the bent axle (1).

Embodiment: bent axle (1) process two parallel to each other, mutual symmetrical eccentric grove, internal surface at outer shroud (3) processes the hypocycloid curved surface with z+1 tooth, retainer (2) is installed between hypocycloid curved surface and bent axle, retainer processes two rounds on (2), every round has z hole, and ball (B1) is installed in the hole, differs 180 °/z between two rounds.Snap ring (B2) or spring arch clasp are installed in the two ends of retainer, with outer shroud (3) axial restraint.Again inward, sealing cover (B3) can be installed in the spring arch clasp, also can not install.Bent axle processes keyway in (1), is installed together with input shaft, and the outside of outer shroud (3) processes keyway, is connected with output shaft.At this moment, the velocity ratio of input shaft and output shaft is z. velocity ratio more than from 2 to 100.When the bearing speed reducer rotated, every row's rolling element had half at work, bearing load, pure rolling, smooth running, noise free.

Only change a little and can process with existing equipment during processing hypocycloid curved surface.

The volume and weight of bearing speed reducer is equivalent to a double-row bearing, makes one of percentage of general speed reducer.Replace its weight of original speed reducer will descend much with it.Such as, the weight of rice-26 helicopter main gear reducers is 100 times of weight of bearing speed reducer.

Claims

1. a bearing and speed reducer-bearing speed reducer, it is a kind of bearing that can slow down, it is by rolling element (B1), snap ring (B2) and seal ring (B3) form, it is also by outer shroud (3), retainer (2), bent axle (1) forms, it is characterized in that: it can slow down, bent axle (1) is installed in the retainer (2), outer shroud (3) is installed in outside the retainer (2), and snap ring (B2) and seal ring (B3) are with outer shroud (3) axial restraint, and they have consisted of the hypocycloid reducing gear jointly.

2. the outer shroud of bearing speed reducer according to claim 1 (3), it is characterized in that: there is keyway the outside of outer shroud (3), is used for being connected with output shaft, and inside is the hypocycloid curved surface.

3. the bent axle of bearing speed reducer according to claim 1 (1) is characterized in that; Several eccentric groves that hang down mutually with bent axle (1) are arranged on the bent axle (1), rolling element (B1) is installed in the eccentric grove.

4. the retainer of bearing speed reducer according to claim 1 (2), it is characterized in that: on retainer (2), the hole that has several rows to be used for installing rolling element (B1), the same angle that is staggered between two adjacent rounds and the hole, the hole count of every round is less than the number of teeth of hypocycloid curved surface.

5. bearing speed reducer according to claim 1 according to lubricated needs, also can not installed seal ring (B3).

According to claim 3 with several eccentric groves claimed in claim 4 and a few round in several, comprise 1, optimum value is 2.

7. snap ring (B2) can be installed on the bent axle (1), also can be installed on outer shroud (3) and the retainer (2).