CN101067442A

CN101067442A - Pure rolling speed reducer

Info

Publication number: CN101067442A
Application number: CNA2007100785967A
Authority: CN
Inventors: 梁锡昌; 潘继生
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2007-06-08
Filing date: 2007-06-08
Publication date: 2007-11-07
Anticipated expiration: 2027-06-08
Also published as: CN100434753C

Abstract

A pure rolling reducer includes the eccentric reducing mechanism, the few tooth difference reducing mechanism and the few tooth difference output mechanism. The inner gear, the duplicate gear and the output gear all have the pressure angle with standard tooth shape and the groove width is 2-6 times than the tooth thickness. The inner gear and the duplicate gear are connected by the gear roller, also the output gear and the duplicate gear which the meshed process are all rolling friction. The two ends of the gear roller are connected by the flexible distance sleeve. The gear roller distance in meshed process is compensated by the flexible distance sleeve. The inner and the out gears mesh by rolling, so they have small friction loss, also every pressure angle of the gear is the standard pressure angle to get over the defects of the big pressure angle of the active tooth reducer, small circle force and low efficiency.

Description

Pure rolling speed reducer

Technical field

The present invention relates to a kind of interior engagement little tooth difference speed reducer.

Technical background

At present, in the existing various interior engagement retarders, there are sliding friction in internal gear and external gear in engagement process, shunted power greatly.Cycloidal pinwheel planetary gear speed reducer is sliding friction between cycloid wheel and the gear pin under the situation that does not have the gear pin cover; Under the situation that the gear pin cover is arranged,, between needle guard and gear pin, be sliding friction though be rolling friction between cycloid wheel and the gear pin cover.And the pressure angle of movable teeth reducer is too big, and circumference component is too small, and transmission efficiency is low.Proposed engagement planetary speed reducer in a kind of anodontia pure rolling in the Chinese patent 94209514.6, but this speed reducer planet wheel outer surface is an elastic material, bearing capacity difference and rigidity are little, are not suitable for the situation of highi degree of accuracy and high-power transmission.

Summary of the invention

The purpose of this invention is to provide high efficiency, general pure rolling speed reducer that a kind of flute profile has the standard pressure angle.

Technology contents of the present invention is: a kind of pure rolling speed reducer, comprise eccentric reducing gear, few tooth difference speed reducing mechanism and few tooth difference output mechanism, wherein eccentric reducing gear is by eccentric input shaft 7, interior roller 5, interior separation sleeve 6 and duplicate gear 4 are formed, few tooth difference speed reducing mechanism is by duplicate gear 4, elastomeric isolation cover 2, gear roller 3 and internal gear 1 are formed, few tooth difference output mechanism is by duplicate gear 4, elastomeric isolation cover 2, gear roller 3 and output gear 10 are formed, it is characterized in that: internal gear 1, it is 2～6 times of transverse tooth thickness that duplicate gear 4 and output gear 10 have standard tooth form pressure angle and groove width, between internal gear 1 and duplicate gear 4 and between output gear 10 and the duplicate gear 4, be connected by gear roller 3, make between internal gear 1 and the duplicate gear 4 and the engagement process of output gear 10 and duplicate gear 4 is rolling friction, gear roller 3 two ends connect by elastomeric isolation cover 2 respectively, and the displacement amount that absorbs 3 generations of engagement process middle gear roller is compensated by elastomeric isolation cover 2.Few tooth difference speed reducing mechanism of the present invention also can be zero teeth difference type output mechanism or axial pin type output mechanism etc.

Advantage of the present invention is that internal gear and external gear mesh by pure rolling, and frictional loss is little, and to have kept each gear flute profile pressure angle be the standard pressure angle, and it is excessive to have overcome the movable teeth reducer pressure angle, and circumference component is too small, inefficient shortcoming.。

Description of drawings

Fig. 1 is the half sectional view of pure rolling speed reducer;

Fig. 2 is that pure rolling speed reducer A-A is to view;

Among the figure: 1. internal gear, 2. elastomeric isolation cover, 3. gear roller, 4. duplicate gear, 5. interior roller, 6. interior separation sleeve, 7. eccentric input shaft, 8. input rolling bearing, 9. input shaft seal ring, 10. output gear, 11. spacer, 12. equilibrium blocks, 13. roller bearings, 14. left cover, 15. right covers, 16. output rolling bearings, 17. the output seal ring, 18. outer separation sleeves, 19. outer rollers.

Embodiment

The invention will be further described below in conjunction with drawings and Examples:

A kind of pure rolling speed reducer involved in the present invention, comprise eccentric reducing gear, few tooth difference speed reducing mechanism and few tooth difference output mechanism, wherein eccentric reducing gear is by eccentric input shaft 7, interior roller 5, interior separation sleeve 6 and duplicate gear 4 are formed, few tooth difference speed reducing mechanism is by duplicate gear 4, elastomeric isolation cover 2, gear roller 3 and internal gear 1 are formed, few tooth difference output mechanism is by duplicate gear 4, elastomeric isolation cover 2, gear roller 3 and output gear 10 are formed eccentric reducing gear, few tooth difference speed reducing mechanism and few tooth difference output mechanism and left cover 14, right cover 15, input rolling bearing 8, input seal ring 9, output rolling bearing 16, output seal ring 17, outer separation sleeve 18, annexes such as outer roller 19 and equilibrium block 12 are formed a retarder of finishing.

When eccentric input shaft 7 when its geometrical center o-o rotates, because roller 5 radially promoted duplicate gear 4 misalignment internal gears 1 center in the off-centre of roller path forced on the eccentric input shaft eccentric shaft cylindrical, roller 5 passes to duplicate gear 4 to the rotation of eccentric input shaft 7 by pure rolling simultaneously, makes the existing rotation around self geometrical center of the motion of duplicate gear 4 that the revolution around internal gear 1 center o-o be arranged again.The number of teeth is Z on duplicate gear 4 ₂The part tooth meshes by gear roller 3 and internal gear 1, in the rolling of overmask process middle gear roller 3 generations to internal gear 1 tooth root direction, give internal gear 1 with transmission of power simultaneously, produce rolling to internal gear 1 tooth top direction nibbling out process middle gear roller 3, (number of teeth is Z with internal gear 1 by above-mentioned motion duplicate gear 4 ₁) realized the part velocity ratio of retarder; (number of teeth is Z to output gear 10 simultaneously ₄) by with duplicate gear 4 numbers of teeth be Z ₃The part tooth carries out similar engagement, realized another part velocity ratio of retarder, be connected with internal gear 1 by outer roller 19 owing to output gear 10 simultaneously, the peripheral force of duplicate gear promotes output gear 10 and rotates, make output gear 10 output of will moving, few tooth difference speed reducing mechanism and few tooth difference output mechanism combine and have realized that velocity ratio is

i = \frac{Z_{4} Z_{2}}{Z_{4} Z_{2} - Z_{3} Z_{1}}

Deceleration.

Because the reverse movement in the motion of gear roller 3 in duplicate gear 4 overmask processes and the process of nibbling out; therefore the track formed of the center of gear roller 3 be not one just round; but constantly changing; therefore fixed gear roller separation sleeve is selected the elastomeric isolation cover 2 with elastic characteristic for use, and making does not have the centrode of meshed gears roller 3 to be returned to the effect of standard pitch circle position.

Claims

1, a kind of pure rolling speed reducer, comprise eccentric reducing gear, few tooth difference speed reducing mechanism and few tooth difference output mechanism, wherein eccentric reducing gear is by eccentric input shaft (7), interior roller (5), interior separation sleeve (6) and duplicate gear (4) are formed, few tooth difference speed reducing mechanism is by duplicate gear (4), elastomeric isolation cover (2), gear roller (3) and internal gear (1) are formed, few tooth difference output mechanism is by duplicate gear (4), elastomeric isolation cover (2), gear roller (3) and output gear (10) are formed, it is characterized in that: internal gear (1), it is 2～6 times of transverse tooth thickness that duplicate gear (4) and output gear (10) have standard tooth form pressure angle and groove width, between internal gear (1) and duplicate gear (4) and between output gear (10) and the duplicate gear (4), be connected by gear roller (3), make between internal gear (1) and the duplicate gear (4) and the engagement process of output gear (10) and duplicate gear (4) is rolling friction, gear roller (3) two ends connect by elastomeric isolation cover (2) respectively, and the displacement amount that engagement process middle gear roller (3) produces is compensated by elastomeric isolation cover (2).