CN2410478Y

CN2410478Y - Gear ratio fixed gear speed reducer

Info

Publication number: CN2410478Y
Application number: CN 00219223
Authority: CN
Inventors: 胡志良
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-20
Filing date: 2000-01-20
Publication date: 2000-12-13
Anticipated expiration: 2010-01-20

Abstract

The utility model relates to a speed ratio fixed gear speed reducer which is provided with a big case body, a bearing, an input shaft and an output shaft; a first and a second driving gears are fixed on the input shaft, a transmission shaft is supported and is arranged in the big case body, a transmission gear and a differential gear are fixed on the transmission shaft, and a frame of a planet gear correspondingly is rotated, supported through the bearing and is arranged in the big case body; a speed ratio fixed gear which can be engaged with a differential gear is fixed on one side of the frame of the planet gear, the other side of the frame of the planet gear is provided with a planet gear which is engaged with the second driving gear, and an inner gear which is engaged with the planet gear is fixed at the inner end of the output shaft. The utility model has the advantages of simple fabrication, easy assembly, small size, etc.

Description

Speed ratio fixed gear speed reducer

The utility model relates to a kind of speed reducer, particularly a kind of speed ratio fixed gear speed reducer.

The large speed ratio speed reducer of usefulness mainly is a cycloidal planetary gear speed reducer in the market, but cycloidal planetary gear speed reducer has following shortcoming: processed complex, and the assembling difficulty, volume is big, and pendulum is than the easy damage of bearing.

The purpose of this utility model provides a kind of speed ratio fixed gear speed reducer simple, that assembling is easy, volume is little of processing.

The technological scheme that realizes above-mentioned purpose is: a kind of speed ratio fixed gear speed reducer, and have big casing and bearing, and be bearing in input shaft and output shaft on the big casing, be fixed with first driving gear and second driving gear on the input shaft; Also be supported with transmission shaft in the big casing, be fixed with driving gear and differential gear on the transmission shaft; Also supporting relatively turnable planetary carrier in the big casing by bearing, one side of planetary carrier is fixed with the speed ratio fixed gear that can be meshed with differential gear, the opposite side of planetary carrier is supported with the planetary pinion that can be meshed with second driving gear, and planetary pinion and planetary carrier are rotationally connected; The inner of output shaft is fixed with the internal gear that can be meshed with planetary pinion; Planetary carrier is passed in the stage casing of input shaft, and is bearing on the planetary carrier by bearing.

After adopting technique scheme, the gear in the big casing is straight-tooth gear, thereby processing is very simple, and assembling also is easy to.With the situation of the same speed ratio of cycloidal planetary gear speed reducer under, the internal gear of this speed reducer is littler than the internal gear facewidth of cycloidal planetary gear speed reducer, the number of teeth is few, thereby the volume of internal gear is much smaller, thereby makes the volume of whole speed reducer much smaller.Simultaneously, owing to all be rigid transmission between gear and the gear, so can obtain stable output power.

The embodiment who provides below in conjunction with accompanying drawing is described in further detail the utility model.

Fig. 1 is the structural representation of the utility model speed ratio fixed gear speed reducer.

As shown in Figure 1, a kind of speed ratio fixed gear speed reducer has big casing 3 and bearing 13, and is bearing in input shaft 6 and output shaft 1 on the big casing 3, is fixed with first driving gear 7 and second driving gear 2 on the input shaft 6; Also be supported with transmission shaft 9 in the big casing 3, be fixed with driving gear 8 and differential gear 10 on the transmission shaft 9; Also supporting relatively turnable planetary carrier 11 in the big casing 3 by bearing 13, one side of planetary carrier 11 is fixed with the speed ratio fixed gear 5 that can be meshed with differential gear 10, the opposite side of planetary carrier 11 is supported with the planetary pinion 4 that can be meshed with second driving gear 2, the planet pin 4-1 of planetary pinion 4 is bearing on the planetary carrier 11 by bearing 13, and the planetary pinion 4 here can be 2 or many; The axle head of output shaft 1 is fixed with the internal gear 12 that can be meshed with planetary pinion 4; Planetary carrier 11 is passed in the stage casing of input shaft 6, and is bearing on 11 of the planetary pinions by bearing 13.First driving gear 7 has Z1 tooth, and driving gear 8 has Z2 tooth, and second driving gear 2 has Z5 tooth, and internal gear 12 has Z6 tooth, and Z2/Z1-Z6/Z5=1, differential gear 10 have Z3 tooth, and speed ratio fixed gear 5 has Z4 tooth, and Z3 and Z4 differ 1 tooth or number tooth.

As shown in Figure 1, the inner of the inner of input shaft 6 and output shaft 1 is rotationally connected, and make input shaft 6 stressed even, thereby running steadily.

Opposite side at input shaft 6, the symmetrical position of transmission shaft 9 also can increase a transmission shaft 9 again, and on this transmission shaft 9 fixedly connected driving gear 8 and differential gear 10, driving gear 8 and 7 engagements of first driving gear,

differential gear

10 and 5 engagements of speed ratio fixed wheel gear, can make the input shaft 6 and first driving gear 7 stressed even like this, guarantee the steady of running.

The deceleration principle is described as follows: when differential gear 10 is identical with speed ratio fixed gear 5 numbers of teeth, if input shaft 6 rotations, planetary pinion 4 moves in a circle around internal gear 12, at this moment output shaft 1 is motionless, being zero changes, when differential gear 10 is more multiple tooth than speed ratio fixed gear 5, for multiple tooth poor, this moment output shaft 1 turn to input shaft 6 turn to identical, for clockwise; When differential gear 10 lacked tooth than speed ratio fixed gear 5, poor for few tooth, this moment, output shaft 1 turned to and input shaft 6 switched in opposite, was counter-rotating.

The speed ratio formula of speed reducer is as follows:

i＝[(Z2/Z1)·Z4/(Z3-Z4)]/2

For example: be Z1=15, Z2=60, Z3=38, during Z4=37,

i＝[(60/15)·37/(38-37)]/2＝74

The utility model speed ratio fixed gear speed reducer job step is as follows:

Input shaft 6 is by the power driven rotary, first driving gear 7 on the input shaft 6 and second driving gear 2 are followed input shaft 6 rotations, be divided into two tunnel transmissions then, first via transmission is rotated by the driving gear 8 that first driving gear 7 drives on the transmission shaft 9, driving gear 8 drives transmission shaft 9 rotations, so the differential gear 10 on the transmission shaft 9 is followed transmission shaft 9 rotations, differential gear 10 drives speed ratio fixed gear 5 rotations that are meshed with it again, speed ratio fixed gear 5 drives 11 rotations of fixedly connected with it planetary carrier again, and planetary carrier 11 drives planet pin 4-1 and planetary pinion 4 moves in a circle around internal gear 12; The second tunnel transmission drives the planetary pinion 4 that is meshed with it by second driving gear 2 and rotates; The two-way transmission converges, and forms differential drive, thereby makes internal gear 12 obtain very little rotating speed, just makes the output shaft 1 of fixedlying connected with internal gear 12 obtain very little rotating speed, and can obtain very big output torque.

Claims

1, a kind of speed ratio fixed gear speed reducer has big casing (3) and bearing (13), and is bearing in input shaft (6) and output shaft (1) on the big casing (3), it is characterized in that:

Be fixed with first driving gear (7) and second driving gear (2) on a, the input shaft (6);

Also be supported with transmission shaft (9) in b, the big casing (3), be fixed with driving gear (8) and differential gear (10) on the transmission shaft (9);

Also supporting relatively turnable planetary carrier (11) in c, the big casing (3) by bearing (13), one side of planetary carrier (11) is fixed with the speed ratio fixed gear (5) that can be meshed with differential gear (10), the opposite side of planetary carrier (11) is supported with the planetary pinion (4) that can be meshed with second driving gear (2), and planetary pinion (4) and planetary carrier (11) are rotationally connected;

The inner of d, output shaft (1) is fixed with the internal gear (12) that can be meshed with planetary pinion (4);

Planetary carrier (11) is passed in the stage casing of e, input shaft (6), and is bearing on the planetary carrier (11) by bearing (13).

2, speed ratio fixed gear speed reducer according to claim 1 is characterized in that: the inner of the inner of input shaft (6) and output shaft (1) is rotationally connected.