CN201326695Y

CN201326695Y - Single-crank translation fully-balanced reducer

Info

Publication number: CN201326695Y
Application number: CNU2008202099331U
Authority: CN
Inventors: 黄溧震
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-08
Filing date: 2008-10-08
Publication date: 2009-10-14
Anticipated expiration: 2018-10-08

Abstract

The utility model relates to an efficient gear reducer or accelerator device with a large transmission ratio, belonging to the field of few-teeth-difference translation planetary mechanism. The structure is characterized in that three external gears [8] with the same parameters and turning to a certain angle, a crankshaft formed through installing three eccentric sleeves [5] on a shaft [3], a plurality of dowel pins [6] and a case cover [2] form three groups of virtual parallelogram mechanisms to realize translation; speed exchange is realized through few-teeth-difference engagement between the three external gears [8] and an output internal gear shaft [1]; a balancer [10] is arranged on an input shaft and can effectively eliminate the inertia moments of the three groups of mechanisms. The utility model has the advantages that the single-crank internal-parallel-moving fully-balanced reducer is provided with all advantages of three-ring reducers, the structure and the size are decreased by one third compared with three-ring reducers, and the vibration and noise properties are greatly superior to the vibration and noise properties of three-ring reducers.

Description

The full balance retarder of translation in the single crank

Technical field

The utility model relates to the retarder of transmitting movement and power in a kind of machinery, relates in particular to the full balance retarder of translation in a kind of single crank.

Background technique

At present, known little gear difference planetary driving mechanism has number of different types, and volume is big, efficient is low or mechanism is complicated, bearing capacity is low but all exist basically, and vibrates defectives such as big, that noise is big.As " three ring deceleration (or speedup) transmission devices " (patent No. 85106692), though the efficient height, the periodicity moment of inertia that is caused by eccentric motion does not balance, and causes bigger vibration and noise." positive three-ring speed reducer " (patent No. 98245414.7) though changed compound mode, simplified manufacturing process greatly; Increase Equilibrator, obviously reduced vibration and noise, but failed fundamentally to change " three rings " excessive structural type, ugly profile and inconvenient bind mode." master control formula internal parallel gear retarder " (patent No. 99255939.1) and " interior three ring gear retarders " (patent No. 96204914.X), though structure is " three rings " and " positive three rings " compactness, the periodicity moment of inertia that is caused by eccentric motion on eccentric shaft is not still overcome.

The model utility content

The purpose of this utility model provides the full balance retarder of translation in a kind of single crank, and its gear range is big, simple in structure, volume is little, stable drive, transmission efficiency height, makes simple.

The technological scheme that realizes the utility model purpose is the full balance retarder of translation in a kind of single crank, it mainly is made up of output internal tooth axle, casing, input shaft, support plate, eccentric bushing, pin, guide, external gear, key, balace weight and case lid etc., and input shaft is in 120 ° of eccentric bushings by key and three eccentric directions and forms three crankshafts; Three on all four external gears of parameter are on the Bearing Installation crankshaft; N pin is that fulcrum forms simple beam structure with case lid and support plate respectively, is with guide on the pin, as virtual crank, forms parallel-crank mechanism with crankshaft, external gear, case lid; Three identical external gears of parameter, the gear teeth turn over certain angle relatively and mesh simultaneously with in the work of exporting the internal tooth axle, form three internal tooths of forming 120 ° of distributions and lack tooth difference engagement driving; A pair of balace weight is installed on the input shaft, the outside of three external gears, and the setting-up eccentricity direction becomes clockwise 90 ° of angles and counterclockwise 90 ° of angles with the eccentric direction of a middle eccentric bushing, and becomes 150 ° of angles with the eccentric direction of adjacent eccentric bushing.

The utlity model has following beneficial effect: input form of the present utility model is a single crank, has simplified internal structure; Axle in the structure (pin) all becomes the simply supported beam form, has improved the rigidity of mechanism greatly; Considered the problem of stress balance comprehensively, made its balance quality and noise index be not less than all types of universal speed reducers.Therefore, the utility model not only has all advantages of " three rings " and " positive three rings " class retarder on performance; And vibration and noise index are much better than all kinds of planetary drive with small teeth difference retarders; Simultaneously, on the monnolithic case size with the power type, can reduce about 1/3rd than " three rings " and " positive three rings ".

Description of drawings

For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment also in conjunction with the accompanying drawings, the utility model is described in further detail below, wherein:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the schematic representation of eccentric bushing and equilibrium block location arrangements on the input shaft.

Fig. 3 is the schematic representation of A position balance piece eccentric direction.

Fig. 4 is the schematic representation of B position eccentric bushing eccentric direction.

Fig. 5 is the schematic representation of C position eccentric bushing eccentric direction.

Fig. 6 is the schematic representation of D position eccentric bushing eccentric direction.

Fig. 7 is the schematic representation of E position balance piece eccentric direction.

Embodiment

Fig. 1 is a structural representation of the present utility model, also is an example of the present utility model.Major part of the present utility model has by output internal tooth axle [1], casing [2], input shaft [3], support plate [4], eccentric bushing [5], pin [6], guide [7], external gear [8], key [9], balace weight [10] and case lid [11] etc. to be formed.Input shaft [3] is in 120 ° eccentric bushing [5] by key [9] and three eccentric directions and forms three crankshafts; Three identical external gears of parameter [8], are connected with input shaft [3] on crankshaft by Bearing Installation; N pin-and-hole arranged on the external gear [8], and its diameter is: guide diameter+2 offsets; Pin [6] is that fulcrum forms simple beam structure with case lid [11] and support plate respectively; Then crankshaft, external gear [8], pin [6], case lid [11] and support plate [4] just constitute three groups of phase differences and are 120 ° of pseudo-parallelogrammechanism mechanism.When being rotatablely moved by one of input shaft [3] input, then three external gears [8] are that radius is done the circle translation round the crankshaft shaft axis with the offset.Three identical external gears of parameter [8], the gear teeth turn over certain angle relatively and mesh with the internal tooth of exporting internal tooth axle [1] simultaneously, form three internal tooths of forming 120 ° of distributions and lack tooth difference engagement driving, round translation with external gear [8] converts rotatablely moving of internal tooth axle [1] to again, realizes the rotating speed exchange.

Among Fig. 1, pin [6] is bearing in support plate [4] respectively and case lid [11] is gone up the setting type that forms simply supported beam, has improved the rigidity and the bearing capacity of pin [6] greatly.Guide [7] is to convert rolling friction to for sliding friction.The quantity of pin is decided by the power that transmits and the needs of structure.

Among Fig. 1, the angle that three external gears [8] turn over when processing or installation relatively should meet the gear engagement rule, and concrete rule can be with reference to " three rings " and " positive three rings " related technical know-how.

Among Fig. 1, go up at input shaft [3], the outside of three external gears [8], a pair of balace weight that calculates according to spatial balance power system is housed, effectively the periodicity moment of inertia (vibration) that causes by three groups of eccentric motions of balance.

Fig. 2 to Fig. 7 is that eccentric bushing of the present utility model [5] is arranged schematic representation with balace weight [10].Concrete arrangement is as follows: the eccentric direction of (1) three eccentric bushing [5] is arranged by clockwise or 120 ° of angles of the adjacent one-tenth of counter clockwise direction; (2) a pair of balace weight [10] is installed in that input shaft [3] is gone up, the outside of three external gears [8], the setting-up eccentricity direction becomes clockwise 90 ° of angles and counterclockwise 90 ° of angles with the eccentric direction of a middle eccentric bushing [5], and becomes 150 ° of angles with the eccentric direction of adjacent eccentric bushing [5].In actual production, in order to reduce parts peculiar, balace weight is made adjustable, so just can be general in same seat No..

Claims

1, the full balance retarder of translation in a kind of single crank, it mainly is made up of output internal tooth axle [1], casing [2], input shaft [3], support plate [4], eccentric bushing [5], pin [6], guide [7], external gear [8], key [9], balace weight [10] and case lid [11] etc., it is characterized in that:

(1), input shaft [3] is in 120 ° eccentric bushing [5] by key [9] and three eccentric directions and forms three crankshafts;

(2), three on all four external gears of parameter [8], by Bearing Installation on crankshaft;

(3), a N pin [6] is that fulcrum forms simple beam structure with case lid [11] and support plate [4] respectively, is with guide [7] on the pin [6], as virtual crank, forms parallel-crank mechanism with crankshaft, external gear [8], case lid [11];

(4), three identical external gears of parameter [8], the gear teeth turn over certain angle simultaneously and engagement in the work of output internal tooth axle [1] relatively, form the three few tooth difference engagement driving of internal tooths of forming 120 ° of distributions;

(5), a pair of balace weight [10] is installed in that input shaft [3] is gone up, the outside of three external gears [8], the setting-up eccentricity direction becomes clockwise 90 ° of angles and counterclockwise 90 ° of angles with the eccentric direction of a middle eccentric bushing [5], and becomes 150 ° of angles with the eccentric direction of adjacent eccentric bushing [5].