CN2195006Y

CN2195006Y - Face engaging circle-arc tooth speed reducer

Info

Publication number: CN2195006Y
Application number: CN 94207933
Authority: CN
Inventors: 肖有义; 肖剑琴
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-03-30
Filing date: 1994-03-30
Publication date: 1995-04-19
Anticipated expiration: 2004-03-30

Abstract

The utility model belongs to a universal mechanical drive device which is mainly composed of a wheel spider, an oscillating tooth disk, an input shaft, an eccentric sleeve and an output mechanism of a bell crank type or a zero teeth difference type. The speed reducer adopts multi-tooth meshing engagement and surface contact driving, and relative slip does not exist between engaging surfaces after the speed reducer is stressed. Therefore, the utility model has the advantages of high carrying capacity, small friction loss and high efficiency, and major parts can be made of common materials. The range of drive ratio is large, with a single-stage optimum drive ratio i=8-225. Besides, the power range is large, thus the utility model is particularly suitable for speed reducers with large and middle power. The device has a simple structure and is easy to manufacture without the need of special processing devices.

Description

Face engaging circle-arc tooth speed reducer

The utility model belongs to the universal machine transmission device.

The used speed reducer of mechanical transmission has involute gear, worm and gear, cycloidal-pin wheel and teeth-adjustable reducer etc. at present.Wherein cycloidal planetary gear speed reducer is a kind of high performance speed reducer, and it is a major character with multiple tooth engagement, and other speed reducer has advantages such as the high volume of bearing capacity is little relatively; But its cycloid wheel needs special processing equipment, and to material and requirement on machining accuracy height, the flank of tooth is easy to occur gummed when high-power.Chinese patent 91201002.9 disclosed a kind of teeth-adjustable reducers have the advantage of multiple tooth engagement, good manufacturability simple in structure; But still exist the material requirements height, the flank of tooth is prone to the problem of gummed when high-power.

The purpose of this utility model is that a kind of speed reducer with multiple tooth engagement, face Contact Transmission will be provided, and to improve its bearing capacity, reduces the requirement to material, and avoids flank of tooth gummed.

Basic principle of the present utility model is as shown in Figure 1: it is by forming with wheel spider 1, oscillating tooth dish 2, input shaft 3, eccentric bushing 4 and three kind of different output mechanism of casing one.

Be fixed with gear pin 5 on the wheel spider 1, be with pin gear sleeve 6 on it.The pin gear sleeve profile is the interior garden cambered surface of the quartering, pays with the outer garden formation face engagement of oscillating tooth cover 7.

Oscillating tooth cover 7 is housed on the oscillating tooth dish 2.Oscillating tooth cover is the shell-like part, with hole on the oscillating tooth dish movingly.

Eccentric bushing 4 is housed on input shaft 3, and is integral with key connecting.Rolling bearing 8 is housed on the eccentric bushing 4, oscillating tooth dish 2 is installed on the bearing outer ring.

When input shaft 3 rotates, drive 2 motions of oscillating tooth dishes by bearing 8, when oscillating tooth cover 7 it on during with pin gear sleeve 6 engagements, promptly oscillating tooth puts outer garden cylinder and contacts with interior garden cambered surface on the pin gear sleeve, there is not slide relative between two surface of contact of stressed back, and 5 rotations of pin gear sleeve 6 cast-over alligators.Because the reaction force of 6 pairs of oscillating tooth covers 7 of pin gear sleeve impels oscillating tooth cover 7 to drive oscillating tooth dish 2 and rotates, this rotates the switched in opposite with input shaft 3, is the output speed of speed reducer.Because the difference of output mechanism is formed three kinds of patterns of the present utility model:

1, crank throw formula output mechanism pattern

Shown in Fig. 2 a: wheel spider 1, oscillating tooth dish 2, input shaft 3, eccentric bushing 4, gear pin 5, pin gear sleeve 6, oscillating tooth cover 7, rolling bearing 8.Output shaft is 9, and crank throw 10 and 2 moving connections of oscillating tooth dish are housed on it, and output shaft 9 is passed in the rotation of oscillating tooth dish 2.The quantity of crank throw is generally got 3-6.In order to reach the balance of mechanism, equilibrium block 11 is housed simultaneously on input shaft 3.；

2, zero tooth differential output mechanism pattern

As Fig. 2 _bShown in: except that output mechanism, other all is same as crank throw formula output mechanism pattern.Its output mechanism is, processes ring gear on oscillating tooth dish 2, and at output shaft 9 ends processing external gear, both mesh the composition zero teeth difference type output mechanism, and output shaft 9 is passed in the rotation of oscillating tooth dish 2.

The pin gear sleeve 6 of above-mentioned two kinds of patterns with the quantitative relation and the velocity ratio formula of oscillating tooth cover 7 is:

If the pin gear sleeve number is Z _b, the oscillating tooth tricks is Z _c, Z is then arranged _b=Z _c+ 1

The velocity ratio formula is i=-Zc

3, differential structure pattern

As shown in Figure 3: it is to be formed by two groups of pin teeth (comprising pin gear sleeve, gear pin) oscillating tooth (comprising oscillating tooth cover, oscillating tooth dish) system in combination shown in Figure 2: wherein one group of gear pin, pin gear sleeve (Z _B1) connect with wheel spider 1; Another group gear pin, pin gear sleeve (Z _B2) connect with output shaft 9.Two groups of oscillating tooth dishes are enclosed within respectively on the capacity eccentric bearing of 180 ° of phase differences, and two oscillating tooth dishes connect with some crank throws are movable, form the differential structure pattern.

The pin gear sleeve of two systems is counted Z _B1And Z _B2With oscillating tooth tricks Z _C1And Z _C2Following relation: Z is arranged _B1=Z _C1+ 1, Z _B2=Z _C2+ 1.

The velocity ratio formula is i=(Z _C1Z _B2)/(Z _C1-Z _B2+ 1)

The utility model compared with prior art has following advantage:

1, can realize multiple tooth engagement, can reach the face Contact Transmission again, thereby reduce Contact Stress of Gear widely, corresponding bearing capacity and the impact resistance of having improved; The speed reducer major part can be made with general material (as cast iron middle-carbon steel), has reduced cost.

2, profile of tooth is simple, for outer garden cylinder and interior garden cambered surface, is convenient to manufacturing.Oscillating tooth cover and pin gear sleeve do not have slide relative between outer engagement surface in the stressed back in transmission process, so frictional loss is little, and the efficient height, the life-span is long.

3, gear range is big: the best velocity ratio i=8-225 of single-stage also can reach more than 2000.

4, power range is big, can from several kilowatts to hundreds of kilowatt, be particularly suitable for the speed reducer of high and medium power.

5, complete machine structure is simple, compact, and is easily manufactured, do not need special process equipment.

Accompanying drawing 1 is basic principle figure of the present utility model.

Accompanying drawing 2a is the schematic diagram of first kind of pattern of the utility model.

Accompanying drawing 2 _bIt is the schematic diagram of second kind of pattern of the utility model.

Accompanying drawing 3 is schematic diagrams of the third pattern of the utility model.

Accompanying drawing 4 is structural drawing of first kind of pattern of the utility model, and Fig. 5 is the left view of Fig. 4.

Claims

1, a kind of engagement garden curved tooth speed reducer, comprise wheel spider (1), oscillating tooth dish (2), input shaft (3), eccentric bushing (4) and crank throw formula or zero tooth differential output mechanism, it is characterized in that being fixed with on the wheel spider (1) gear pin (5), be with pin gear sleeve (6) on it, oscillating tooth cover (7) is housed on oscillating tooth dish (2), oscillating tooth cover (7) is gone up the hole movingly with oscillating tooth dish (2), eccentric bushing (4) is housed on input shaft (3) and uses key connecting, rolling bearing (8) is housed on the eccentric bushing (4), and bearing (8) outer ring is equipped with oscillating tooth dish (2).

2, speed reducer according to claim 1 is characterized in that pin gear sleeve (6) profile is the interior garden cambered surface of the quartering.

3, speed reducer according to claim 1 is characterized in that oscillating tooth cover (7) is for having the shell-like part of outer garden cylinder.

4, speed reducer according to claim 1 is characterized in that pin gear sleeve (6) number Duos 1 than oscillating tooth cover (7) number.

5, speed reducer according to claim 1 when it is characterized in that adopting crank throw formula output mechanism, is promptly linked up output shaft (9) and oscillating tooth dish (2) by some crank throws (10); When adopting zero teeth difference type output mechanism, promptly form transmission and pay by the last internal tooth of external tooth on the output shaft (9) and oscillating tooth dish (2).

6, speed reducer according to claim 1 is characterized in that also can being formed by two groups of pin tooth-oscillating tooth system in combination: one group of pin tooth (Z _B1) connect another group pin tooth (Z with wheel spider (1) _B2) connect with output shaft (9), two groups of oscillating tooth dishes are linked up by some crank throws (10).