CN101046242A

CN101046242A - Closed planetary gear reducer

Info

Publication number: CN101046242A
Application number: CN 200710068194
Authority: CN
Inventors: 丁开仙; 俞渭江
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-24
Filing date: 2007-04-24
Publication date: 2007-10-03

Abstract

The closed planetary gear reducer consists of input shaft with sun gears, planet shaft, planet carriers, planet gears and ring gear serving as output shaft. The three planet carriers are mounted on shaft sleeve with bearings and bearing seats on the ring gear; the central gears on the first and the second planet carriers are connected to the second and the third sun gears; and the output shaft is connected to the first, the second and the third sun gears and bearings. The ring gear serving as the shell and the output shaft has great diameter, smooth operation, great bearing capacity, use safety and high strength. The present invention has compact structure, small size, less wear, low noise and high transmission efficiency.

Description

Closed planetary gear reducer

Technical field

The present invention relates to a kind of plane table thermoconductivity meter, particularly a kind of closed planetary gear reducer of on Hoisting Machineries such as steel-wire rope type electric block, winch, lift, tractor, installing and using of suiting.

Background technique

The line shaft that is positioned at casing that patent No. CN200520031509.9 " few tooth difference transmission electric wire hoist retarder " is provided is the double-eccentric shaft structure, described eccentric shaft is provided with two planet wheels, and planet wheel respectively be fixed on casing inner wall on ring gear be meshed, link by bearing pin and the pin dish that is fixed on the axle sleeve, though the input shaft of this structure, output shaft are at the homonymy of casing, compact structure, but output torque not quite also is not suitable for installing and using on large scale hoisting machinery.

Patent No. CN200520027733.0 " the built-in cycloidal-pin wheel planetary speed reducer of input shaft ", though also provide a kind of shaft extension end of input shaft to be arranged in the circular hole of output shaft, described supporting member is by before being fixed on pinwheel, before the flange shape at back two ends, rear end cover constitutes, suspension bracket can be installed on front cover, reel is installed on output shaft, be used for both needing to bear transferring power, need to bear the steel-wire rope type electric block of carrying force again, on the Hoisting Machineries such as winch, but the reel of its circumvolution wire rope also is mounted on the outer output shaft of input shaft, make its bearing capacity, shock resistance, the anti-vibration ability is all not enough, output torque is also little, also only can install and use on minor crane tool equipment.

Summary of the invention

Technical problem to be solved by this invention is: a kind of closed planetary gear reducer is provided, its compact structure, volume are little, but bearing capacity, shock resistance, anti-vibration ability are strong, output torque is big, stable working, supporting use especially on large scale hoisting machineries such as steel-wire rope type electric block, winch, tractor suits.

The present invention addresses the above problem the technological scheme that is adopted: closed planetary gear reducer, to be connected with planet axis by the sun gear on the input shaft, planet carrier also connects into integral body with sun gear planet gear meshed at different levels, planetary pinions at different levels and gear ring engagement are formed the multistage planet reducing gear and are constituted, described gear ring is an output shaft, described third-level planetary frame is installed on the axle sleeve and bearing support that tape spool holds, bearing support is fixed on the gear ring, described one, also be provided with one on the secondary planet frame, the secondary center wheel is with two, three grades of sun gears connect, and are connected with one on the described input shaft, two, three grades of sun gears and bearing.

Compared with prior art, the invention has the advantages that: this retarder is directly made output shaft with the gear ring as casing, the reel Wound steel rope can be installed on output shaft, suit especially both bearing transferring power, bear supporting use on the Hoisting Machinery such as steel-wire rope type electric block, winch of carrying force again.Because of gear ring has a plurality of functions, so and the big stable working of diameter, bearing capacity big, safe in utilization, and the ability of shock resistance and anti-vibration is strong.In addition one, the secondary planet frame is provided with one, the secondary center wheel, directly with two, the short tooth that processes on three grades of sun gear terminations cooperates, and fixedly omitted shaft coupling with back-up ring, structure is simpler, compact, two, three grades of sun gears are enclosed within input shaft and do not take the useful space outward, and in gear transmission, play floating action alignment automatically, the planetary pinion middle straight connects in the nothing in succession, the bearing of outer ring, replaced bearing outer ring with gear, so its compact structure, volume is little, noise is low, and the transmission efficiency height can reach 0.92～0.96, and the third-level planetary gear has four, can alleviate the bearing capacity of each gear, thereby make it not fragilely prolong working life.

Description of drawings

Fig. 1, structural representation of the present invention (sectional view).

The G-G sectional view of Fig. 2, Fig. 1 (end cap is taken away in the primary planet pinion transmission).

The E-E sectional view of Fig. 3, Fig. 1 (third-level planetary gear transmission).

The F-F sectional drawing of Fig. 4, Fig. 1 (primary planet carrier is connected with short tooth on the secondary sun gear).

Embodiment

Below in conjunction with accompanying drawing embodiments of the invention are further described.

I and II planet carrier 20,28 structures are identical, and the intermediate throughholes place has uniform three arc boss of arranging with I and II planet axis span on I and II central gear 23,27, one surfaces, in the middle of the boss screw is arranged, as Fig. 1, Fig. 2, shown in Figure 4.

The outer ring of third-level planetary frame 34 1 ends and intermediate throughholes place, drive fit has the axle sleeve 2 that has bearing 3 and on bearing support 33, one end faces that have bearing 4 four uniform third-level planetary axis holes is arranged respectively, as shown in Figure 1.

Two, in the middle of three grades of sun gears 25,32 through hole, an end being arranged is gear, and end is the diameter short tooth 22,26 little than gear in addition, and weak point tooth 22,26 ends also have circlip groove.

The shaft extension end of input shaft 1 is a spline, and the centre is with two, three grades of sun gears 25,32, and other is fixed with one-level sun gear 14 by end and drive fit has bearing 19.

Gear ring 31 is that integral body processes for output shaft, on spaced one, two, three

internal gear

21,24,7 one end faces screw is arranged on the inwall, and an end face is the flange of band through hole, and I and II internal gear 21,24 is identical, as shown in Figure 1.

One, two, three

planetary pinion

15,11,29 structures are identical, all be by the bearing 16,10,6 that connects no inside and outside circle on the

planet axis

13,8,5, directly replace bearing outer ring to use with gear, and add in the both ends of the surface of each bearing 16,10,6 and

planetary pinion

15,11,29 joints that back-up ring is fixing to be constituted, compact structure, volume are little, 16,10 of two bearings also are equipped with bearing spacer 9, as shown in Figure 1.

In the three planet axis holes on primary planet carrier 20, fix three one-level planet axis 13 respectively, on one-level planet axis 13, connect in the nothing, the primary planet pinion 15 of race bearing 16, the screw that passes in three boss with three screws is fixed into one with one-level pressing plate 17 and primary planet carrier 20, being added with back-up ring on one-level planet axis 13 terminations fixes, prevent axial float, secondary sun gear 25 usefulness gear end are enclosed within on the input shaft, taking turns 23 with short tooth 22 ends with the primary centre on the secondary planet frame 20 cooperates, be fixed on the primary planet carrier 20 with back-up ring, as shown in Figure 4, three primary planet pinions 15 mesh with one-level sun gear 14.This one-level planet wheel is the primary planet carrier floating structure.

The secondary planet wheel is identical with the one-level planetary gear structure, is two differential planet gear transmissions.

With above-mentioned needle bearing 10 and the secondary planetary gear 11 that on secondary planet axle 8, connects no inside and outside circle, three grades of sun gear 32 usefulness gear end are enclosed within on the input shaft 1, taking turns 27 with short tooth 26 and the secondary center on the secondary planet frame 28 cooperates with back-up ring and is fixed on the secondary planet frame 28, three secondary planetary gears 11 mesh with secondary sun gear 25, with screw secondary pressing plate 12 and secondary planet frame 28 are fixed into one, be added with back-up ring on secondary planet axle 8 terminations and fix, the structure that this secondary planet wheel floats simultaneously for secondary planet frame, secondary sun gear.

The bearing 6 that does not have inside and outside circle is connected on the third-level planetary axle 5, is pressed in the third-level planetary gear 29, and is fixed on the third-level planetary spindle nose with three grades of pressing plates 30 and back-up ring and prevents axial float.In four third-level planetary gear 29 uniform four blind holes that are fixed on the third-level planetary frame 34, the splined end of input shaft 1 is inserted in the axle sleeve 2, third-level planetary gear 29 and three grades of sun gear 32 engagements constitute the quasi-planet gear transmission, and as shown in Figure 3, this third-level planetary wheel is the structure that three grades of sun gears float.

Gear ring 31 is enclosed within outside the third-level planetary gear that has assembled, and the one-level internal gear 21 on three primary planet pinions 15 and the gear ring 31 is meshed, three secondary planetary gears 11 mesh with secondary internal gear 24, four third-level planetary gears 29 and three grades of internal gear 7 engagements, with screw gear ring 31 1 end faces and bearing support 33 are fixed into one, end cap 18 is screwed in the screw of gear ring 31 other end faces, and bearing 19 cooperates with end cap 18, constitutes a third-level planetary gearing speed-reducer.

During use, motor output shaft is connected by the splined end of shaft coupling with input shaft 1, one-level sun gear 14 on the driven by motor input shaft 1 rotates, rotate by three primary planet pinions 15 of one-level sun gear 14 drives with its engagement, drive again simultaneously with its engagement gear ring 31 on one-level internal gear 21 rotate, and the primary planet carrier 20 that links into an integrated entity with it is rotated by three one-level planet axis 13, driving the short tooth 22 that links into an integrated entity with it by the wheel of the primary centre on it 23 rotates secondary sun gear 25, rotate by the secondary planetary gear 11 of secondary sun gear 25 drives again with its engagement, secondary internal gear 24 on the gear ring 31 also drives secondary planetary gear 11 rotations simultaneously, driving secondary planet frame 28 by differential rotating speed by three secondary planet axles 8 rotates, driving the short tooth 26 that links into an integrated entity with it by the wheel of the secondary center on it 27 rotates three grades of sun gears 32, rotate by four third-level planetary gears 29 of three grades of sun gears, 32 drives with its engagement, at last by four third-level planetary gears 29 by with the gear ring 31 of its engagement on three grades of internal gears 7, drive whole gear ring 31 and rotate.In transmission process, output power P1, P2 are carried out for the first time, shunt for the second time in I and II internal gear 21,24 engagements on I and II planetary pinion 15,11 and gear ring 31, differential planet gear passes to part power quasi-planet gear third-level planetary gear 29 again and makes its transmission simultaneously, power P 1, the P2 of output power P3 and preceding twice direct output after changing, three component converge exports total output P together, and, moment of torsion slack-off through rotating speed after transmission, the speed change increases, gear ring 31 continuous rotation work under force action.

If connect a cylinder gear ring 31 outside, Wound steel rope just can be used as electric wire hoist and directly carries out lifting and used (figure is picture) on the cylinder.

Claims

1, a kind of closed planetary gear reducer, to be connected with planet axis by the sun gear on the input shaft, planet carrier also connects into integral body with sun gear planet gear meshed at different levels, planetary pinions at different levels and gear ring engagement are formed the multistage planet reducing gear and are constituted, it is characterized in that described gear ring (31) is an output shaft, described third-level planetary frame (34) is installed on the bearing support (33) that axle sleeve (2) that tape spool holds (3) and tape spool hold (4), bearing support (33) is fixed on the gear ring (31), described one, secondary planet frame (20), (28) also be provided with one on, secondary center wheel (23), (27) with two, three grades of sun gears (25), (32) connect, input shaft is connected with one on (1), two, three grades of sun gears (14), (25), (32) and bearing (19).

2, closed planetary gear reducer according to claim 1 is characterized in that spaced one, two, three internal gear (21) on gear ring (31) inwall, (24), (7) constitute the third-level planetary gearing speed-reducer.

3, closed planetary gear reducer according to claim 1, it is characterized in that bearing (16), (10), (6) that the no inside and outside circle of connection is gone up by one, two, three planet axis (13), (8), (5) in described one, two, three planetary pinion (15), (11), (27), directly replace bearing outer ring and add the fixing formation of back-up ring in both ends of the surface and planetary pinion (15), (11), (29) joint of each bearing (16), (10), (6) with gear.

4, closed planetary gear reducer according to claim 1, it is characterized in that two, three grades of sun gears (25), through hole is arranged (32), one end is a gear, end is the diameter short tooth (22) little than gear in addition, (26), short increment also has circlip groove, two, three grades of sun gears (25), (32) be enclosed within on the input shaft (1) with gear end, with short tooth (22), (26) with one, on the secondary planet frame one, secondary center wheel (23), (27) cooperate, and be fixed on one with back-up ring, secondary planet frame (20), (28) on, one-level sun gear (14), bearing (19) is fixed on the input shaft (1).

5, closed planetary gear reducer according to claim 1, it is characterized in that I and II planet axis (13), (8) end also are connected with I and II pressing plate (17), (12), pass screw on I and II planet carrier (20), (28) with screw, I and II pressing plate (17), (12) are fixed on I and II planet carrier (20), (28).

6, closed planetary gear reducer according to claim 1 is characterized in that described third-level planetary gear is made up of four planetary pinions (29), fixes three grades of pressing plates (27) with back-up ring on each third-level planetary axle (5) termination.