CN100356089C

CN100356089C - Shock wave speed reducer

Info

Publication number: CN100356089C
Application number: CNB2005100571530A
Authority: CN
Inventors: 梁锡昌; 王家序
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2005-07-04
Filing date: 2005-07-04
Publication date: 2007-12-19
Anticipated expiration: 2025-07-04
Also published as: CN1730979A

Abstract

The present invention relates to a shock wave speed reducer which is composed of a concentric rolling bearing, an eccentric rolling bearing, a few teeth difference gear mechanism and a rolling spline mechanism, wherein inner gears are orderly excited by the eccentric rolling bearing to make a centripetal movement on all phase positions in a radial way, and the inner gears are leached by the rolling spline mechanism to rotate; thereby, a cylindrical gear on a central shaft is driven by the inner gears, and the rotation is outputted finally. The shock wave speed reducer adopts a multiple-wheel nested structure, and the deceleration is completed at one time; therefore, the shock wave speed reducer has the advantages of compact structure, small size, numerous teeth in engagement and large transmission power; furthermore, the speed reducing ratio range can reach hundreds of times from several times.

Description

Shock wave speed reducer

Technical field

The invention belongs to the mechanical transmission in the mechanical engineering field, particularly a kind of speed reducer.

Technical background

Many kinds of retarders have been arranged at present, differ from one another, development along with production technology, need improve constantly the performance of retarder, require to invent out than better retarder such as existing gear reducer, worm reducer, planetary reducer, cycloidal-pin wheel retarder, harmonic speed reducer, three-ring speed reducer.According to uniting " the mechanical design handbook " (Beijing: China Machine Press's publication) as can be known of writing group and writing, existing planetary pinion has NGW type (JB1799-76), NGW-Z type (JB3722-84), NGW-S type (JB3723-84) and four kinds of base types of NGW-L type (JB3724-84), its structure is internal gear and is installed on the frame as fixed gear, drive the mode of planet wheel input by eccentric shaft, and not driving the internal gear input, planet wheel drives the retarder of eccentric shaft output.Chinese patent (ZL93232557.2) discloses a kind of planet wheel decelerator that drives the internal gear input mode that has, but this retarder has the mode that eccentric shaft drives the planet wheel input simultaneously, be double input mechanism, its complex structure and the very difficult motor coordination that realizes dual input shaft.

Summary of the invention

The purpose of this invention is to provide a kind of compact structure, volume is little, and total number of teeth in engagement is many, the retarder that transmission power is big.

Shock wave speed reducer involved in the present invention, comprise concentric rolling bearing, eccentric rolling bearing, gear with small teeth difference mechanism and rolling spline mechanism is characterized by outer raceway and outer separation sleeve 3 that concentric rolling bearing comprises interior raceway on the casing 1, outer roller 2, eccentric bushing 4 (double as input cover and left side lid); Eccentric rolling bearing comprises interior raceway, interior ball 5, internal gear 7 and the interior separation sleeve 6 of eccentric bushing 4; Gear with small teeth difference mechanism comprises internal gear 7 and cylindrical gears 8; Rolling spline mechanism comprises casing 1 and internal gear 7.

The internal surface center line of eccentric bushing 4 is O ₁-O ₁, there is eccentric e in O-O with the retarder center line, and eccentric rolling bearing is the location and the antifriction mechanism of concentric rolling bearing.

Internal gear 7 is that same part and center line are O with the female splined shaft of rolling spline mechanism ₁-O ₁, the number of teeth of female splined shaft is identical with the number of teeth in internal gear hole, but is distributed on the different circle-dividing diameters.

The left side of casing 1 internal surface is the shell of concentric rolling bearing, and right-hand part is the splined hole of rolling spline mechanism.

Shock wave speed reducer involved in the present invention is simple in structure, and is compact, in light weight, velocity ratio is wide and transmitted power is big.

Description of drawings

Fig. 1 is the plan view of shock wave speed reducer, and it also is the A-A sectional drawing of Fig. 2.

Fig. 2 is the side view of shock wave speed reducer; It also is the B-B sectional drawing of Fig. 1.

Fig. 3 is the C-C sectional view of Fig. 2.

Among the figure: 1. casing, 2. outer roller, 3. outer separation sleeve, 4. eccentric bushing, 5. in ball, 6. in separation sleeve, 7. internal gear, 8. cylindrical gears, 9. central shaft, 10. right lid, 11. rolling bearings, 12. keys, 13. oil sealings, 14. check rings.

Embodiment

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

Shown in Fig. 1～3, shock wave speed reducer involved in the present invention comprises concentric rolling bearing, eccentric rolling bearing, gear with small teeth difference mechanism and rolling spline mechanism.With one heart rolling bearing comprises the outer raceway and the outer separation sleeve 3 of interior raceway on the casing 1, outer roller 2, eccentric bushing 4 (double as input cover and left side lid); Eccentric rolling bearing comprises interior raceway, interior ball 5, internal gear 7 and the interior separation sleeve 6 of eccentric bushing 4; Gear with small teeth difference mechanism comprises internal gear 7 and cylindrical gears 8; Rolling spline mechanism comprises casing 1 and internal gear 7.The center line of the dwell of cam of rolling bearing, cylindrical gears 8, right lid 10, central shaft 9, rolling bearing 11, oil sealing 13 and check ring 14 compositions is O-O with one heart; The center line of eccentric rolling bearing is O ₁-O ₁, there is eccentric e in both.The outer raceway of eccentric bushing 4 is concentric with center line O-O, interior raceway and center line O ₁-O ₁With one heart.

As shown in Figure 2, shock wave speed reducer is fixed on the body by screw thread by the hole of casing 1, is maintained fixed motionless.When the input shaft of motor was imported high speed rotating through key by eccentric bushing 4, the outer raceway of eccentric bushing 4 and casing 1, outer roller 2, outer separation sleeve 3 were formed centering machines, guarantee that the outer raceway of eccentric bushing rotates around center line O-O in retarder.And the interior raceway of eccentric bushing 4 be one with eccentric O ₁-O ₁Surface for center line, therefore eccentric bushing 4 is formed the mechanism with filtering and two kinds of functions of shock wave with interior ball 5, interior separation sleeve 6, internal gear 7, it can make not and then eccentric bushing 4 rotations of internal gear 7, and only the radially excitation of eccentric bushing 4 is passed to internal gear 7, make internal gear 7 do radial motion successively along sense of rotation.

As shown in Figure 1, internal gear 7 is in few tooth difference engagement with cylindrical gears 8 on the central shaft 9, and when closely nibbling, both are in engaging-in state, when far nibbling, both are in the drop out of gear state, owing to exist the number of teeth poor, therefore always there is difference in adjacent two flank of tooth, like this, when eccentric bushing 4 promotes internal gear 7 each tooth when engaging-in successively, the lateral tooth flank of internal gear 7 will promote the respective teeth of cylindrical gears 8 successively and rotate, and drive central shaft 9 output slow rotation through key.

The moment of reaction of load is passed to casing 1 through the splined shaft on central shaft 9, key 12, cylindrical gears 8, the internal gear 7, splined hole on the casing 1 and is born.The gear teeth and the spline tooth of internal gear 7 are in concentric position, therefore, internal gear 7 and cylindrical gears 8, splined hole on splined shaft and the casing 1 all is in the engagement all the time, just both contact pointss differ 180 °, Fig. 3 shows internal gear 7 and cylindrical gears 8 in the top engagement, and splined shaft and splined hole mesh in the bottom.

Central shaft 9 two ends constitute the framework of whole retarder through rolling bearing 11 and eccentric bushing 4, right lid 10 and casing 1.Right lid 10 and casing 1 be for drive fit is connected, and be fixed on the central shaft 9 with check ring 14.The retarder oil lubricating is by the oil sealing leakproof.

The entire work process of this retarder is described below: retarder is fixed on the body by the hole or the screw thread of casing 1, the input shaft of motor is imported high speed rotating through key by eccentric bushing 4, produce shock wave by eccentric stiffener, pass motion to internal gear 7, the lateral tooth flank of internal gear 7 will promote the respective teeth of cylindrical gears 8 successively and rotate, cylindrical gears 8 rotated a tooth when internal gear 7 rotated a week, drove central shaft 9 output slow rotation by key, finished needed deceleration.

Claims

1, a kind of shock wave speed reducer, comprise concentric rolling bearing, eccentric rolling bearing, gear with small teeth difference mechanism and rolling spline mechanism, it is characterized in that concentric rolling bearing is made up of the outer raceway of the interior raceway on the casing (1), outer roller (2), eccentric bushing (4) and outer separation sleeve (3), the left side of casing (1) internal surface is the shell of concentric rolling bearing, and right-hand part is the splined hole of rolling spline mechanism, eccentric bushing (4) double as input cover and left side lid; Eccentric rolling bearing comprises the interior raceway of eccentric bushing (4), interior ball (5), internal gear (7) and interior separation sleeve (6), and the internal surface center line of eccentric bushing (4) is O ₁-O ₁, with retarder center line 0-0 throw of eccentric be e, eccentric rolling bearing is the location and the antifriction mechanism of concentric rolling bearing, the female splined shaft of internal gear (7) and rolling spline mechanism is that same part and center line are O ₁-O ₁, the number of teeth of female splined shaft is identical with the number of teeth in internal gear hole, but is distributed on the different circle-dividing diameters; Gear with small teeth difference mechanism comprises internal gear (7) and cylindrical gears (8); Rolling spline mechanism comprises casing (1) and internal gear (7), central shaft (9) two ends constitute the framework of whole retarder through rolling bearing (11) and eccentric bushing (4), right lid (10) and casing (1), right lid (10) and casing (1) be for drive fit is connected, and be fixed on the central shaft (9) with check ring (14).