CN219045548U

CN219045548U - High-reduction-ratio two-stage cycloidal pin gear speed reducer

Info

Publication number: CN219045548U
Application number: CN202222276657.3U
Authority: CN
Inventors: 王洋; 闫文辉; 孙晓锋; 赵桓桢
Original assignee: Xian Shiyou University
Current assignee: Xian Shiyou University
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2023-05-19
Anticipated expiration: 2032-08-29

Abstract

A high-reduction-ratio two-stage cycloidal pin gear speed reducer comprises a power input shaft, a first reduction mechanism, an intermediate shaft, a second reduction mechanism and a power output shaft which are sequentially connected; the first speed reducing mechanism and the second speed reducing mechanism are arranged to meet the formula: output torque = input torque x gear ratio x gear efficiency; when the power input shaft rotates for one circle with the eccentric sleeve, the cycloidal gear has revolution and autorotation plane motion due to the characteristic of the tooth profile curve on the cycloidal gear and the limiting effect of the needle teeth on the needle gear, and rotates one tooth in the opposite direction to obtain speed reduction, and is transmitted to the intermediate shaft through the pin shaft to obtain lower rotating speed, and the intermediate shaft decelerates according to the same principle and outputs lower speed from the power output shaft; the device has the advantages of high transmission efficiency, small volume, good energy-saving effect, low energy consumption, large transmission torque and the like.

Description

High-reduction-ratio two-stage cycloidal pin gear speed reducer

Technical Field

The utility model relates to a speed reducer, in particular to a high-speed reduction ratio two-stage cycloidal pin gear speed reducer.

Background

In modern machines, speed reducers are used very widely, and serve to match the rotational speed and transmit torque between a prime mover and a working machine or an actuator. At present, in the petroleum field of China, the Erdos basin is provided with a large amount of oil and gas reservoir resources, but most of the oil and gas reservoir resources have low natural productivity, the oil reservoir burial depth is different from 200m to 2000m, the geographical environment of an oil field is complex, the climate condition is bad, in order to meet the production requirement of crude oil, almost all oil extraction equipment adopts a beam pumping unit which has strong adaptability and durability, the pumping unit generally adopts a cylindrical conical gear reducer to reduce the speed, the reducer is generally mainly composed of a parallel shaft gear, a cylindrical gear, a transmission shaft and a box body, and the reduction ratio is too small because the reduction ratio of the gear transmission is relatively low, the stroke frequency is relatively high, the system efficiency is reduced, and the electric power is wasted.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide the secondary cycloidal pin gear reducer with high reduction ratio, and the secondary cycloidal pin gear reducer is used for converting high-speed motion of a motor into low-speed and high-torque motion of a crank, so that the stroke frequency of a conventional pumping unit can be reduced to 1 time/min, the reduction ratio of the pumping unit reducer is greatly improved, and the secondary cycloidal pin gear reducer has the advantages of high transmission efficiency, small volume, good energy-saving effect, low energy consumption, large transmission torque and the like.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a high-reduction-ratio two-stage cycloidal pin gear speed reducer comprises a power input shaft 1, a first reduction mechanism, an intermediate shaft 10, a second reduction mechanism and a power output shaft 16 which are sequentially connected; the first speed reducing mechanism and the second speed reducing mechanism are arranged to meet the formula: output torque=input torque×gear ratio×gear efficiency.

The first speed reducing mechanism comprises a first pin gear shell 4, a first double eccentric sleeve 7, a first roller bearing 8, a first cycloidal gear 6 and a first pin gear 5 are sleeved between the first pin gear shell 4 and the power input shaft 1 from inside to outside in sequence, wherein the first pin gear 5 is meshed and connected between the first pin gear shell 4 and the first cycloidal gear 6. The second speed reducing mechanism comprises a second pin gear housing 15, a second double eccentric sleeve 11, a second roller bearing 12, a second cycloidal gear 13 and a second pin gear 14 are sleeved between the first pin gear housing 15 and the intermediate shaft 10 from inside to outside in sequence, wherein the second pin gear 14 is in meshed connection between the second pin gear housing 15 and the second cycloidal gear 13.

Two first roller bearings 8 are arranged on the first double eccentric sleeve 7, and two first cycloid gears 6 are arranged on the two first roller bearings 8; two second roller bearings 12 are mounted on the second double eccentric sleeve 11, and two second cycloid gears 13 are mounted on the two second roller bearings 12.

The first cycloidal gear 6 is meshed with the pin teeth on the first pin gear 5, and the tooth difference is one tooth; the second cycloidal gear 13 and the needle teeth on the second needle gear 14 are engaged with each other, and the tooth difference is one tooth.

The circumference of the first cycloid gear 6 is provided with a plurality of first pin holes 21, and the first pin holes 21 are correspondingly connected with a plurality of first pins 22 arranged at the input end of the intermediate shaft 10.

The circumference of the second cycloid gear 13 is provided with a plurality of second pin holes 23, and the second pin holes 23 are correspondingly connected with a plurality of second pins 24 arranged at the input end of the power output shaft 16.

The power input shaft 1 is connected with a left end cover 2 through a left end cover bearing 3; the output end of the power output shaft 16 is connected with a support bearing 17, the support bearing 17 is connected with a speed reducer box 18, and the speed reducer box 18 is connected with a right end cover 20 through a right end cover bearing 19.

The first needle gear housing 4 is connected to the second needle gear housing 15 by a needle gear housing connecting plate 9.

The utility model has the beneficial effects that:

1. by adopting the cycloidal pin gear speed reducer, when in transmission, half of teeth participate in meshing, and low-speed and high-torque can be realized. 2. Because the cycloidal pin gear speed reducer has smaller volume, the speed reduction ratio of two pairs of teeth can reach 289, and the transmission efficiency is high, so that the structure is simplified, the cost is reduced, and the energy-saving effect is good. 3. Because the power input shaft and the power output shaft are on the same line, and the structure is compact, compared with a conical cylindrical gear reducer, the power input shaft is smaller in size and more convenient to transport. 4. The unique pin gear meshing and cycloidal gear transmission are adopted, the two-stage reduction ratio is the product of the number of teeth of two cycloidal gears, the reduction ratio is large, and the stroke frequency can be reduced to a great extent.

When the two-stage cycloidal pin gear speed reducer is applied to a pumping unit, compared with a conventional pumping unit speed reducer, the two-stage cycloidal pin gear speed reducer is small in size and convenient to transport, and when the two-stage cycloidal pin gear speed reducer works, half of teeth are in a meshed or half-meshed state, so that the two-stage cycloidal pin gear speed reducer can bear larger force.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic diagram of the structure of the present utility model.

Fig. 3 is a schematic diagram of an input port structure connection, wherein: fig. 3 (a) is a right side view, and fig. 3 (b) is a front cross-sectional view.

Fig. 4 is a schematic diagram of an end face structure of the first reduction mechanism during movement.

Fig. 5 is a schematic structural view of the intermediate shaft 10.

Fig. 6 is a connection diagram of the intermediate shaft 10 and the second cycloid gear 13, in which: fig. 6 (a) is a front cross-sectional view, and fig. 6 (b) is a right side view.

Fig. 7 is a schematic diagram of an end face structure when the second reduction mechanism moves.

Fig. 8 is a schematic view of the structure of the power take-off shaft 16, in which: fig. 8 (a) is a front view thereof, and fig. 8 (b) is a right side view thereof.

Fig. 9 is a schematic diagram of the assembly of the second needle gear 14 with the second needle gear housing 15.

FIG. 10 is a diagram of a model of the transmission of the K-H-V type of this reducer, in which: fig. 10 (a) is a front view thereof, and fig. 10 (b) is a right side view thereof.

Fig. 11 is a schematic diagram of a cycloidal pin gear reducer applied to a high-transmission-ratio split-flow pumping unit.

In the figure, 1-input shaft, 2-left end cover, 3-left end cover bearing, 4-first pin gear housing, 5-first pin gear, 6-first cycloidal gear, 7-first double eccentric sleeve, 8-first roller bearing, 9-size pin gear housing connecting plate, 10-intermediate shaft, 11-second double eccentric sleeve, 12-second roller bearing, 13-second cycloidal gear, 14-second pin gear, 15-second pin gear housing, 16-output shaft, 17-support bearing, 18-box, 19-right end cover bearing, 20-right end cover, 21-first pin hole, 22-first pin, 23-second pin hole, 24-second pin, 25-motor, 26-belt pulley, 27-second cycloidal pin gear reducer, 28-crank, 29-balance block, 30-connecting rod, 31-walking beam, 32-bracket, 33-donkey head.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

Referring to fig. 1 and 2, a high reduction ratio two-stage cycloidal pin gear speed reducer comprises a power input shaft 1, a first reduction mechanism, an intermediate shaft 10, a second reduction mechanism and a power output shaft 16 which are sequentially connected; the first speed reducing mechanism bears small torque, the second speed reducing mechanism bears large torque, and the first speed reducing mechanism and the second speed reducing mechanism meet the formula: output torque=input torque×gear ratio×gear efficiency.

Referring to fig. 1, 3 and 4, the first speed reducing mechanism includes a first pin gear housing 4, a first double eccentric sleeve 7, a first roller bearing 8, a first cycloidal gear 6 and a first pin gear 5 are sleeved between the first pin gear housing 4 and the power input shaft 1 from inside to outside in sequence, wherein the first pin gear 5 is in meshed connection between the first pin gear housing 4 and the first cycloidal gear 6.

Referring to fig. 1, 5 to 9, the second speed reducing mechanism includes a second pin gear housing 15, a second double eccentric sleeve 11, a second roller bearing 12, a second cycloidal gear 13 and a second pin gear 14 are sleeved between the first pin gear housing 15 and the intermediate shaft 10 from inside to outside in sequence, wherein the second pin gear 14 is in meshed connection between the second pin gear housing 15 and the second cycloidal gear 13.

The power input shaft 1 is connected with the first double eccentric sleeve 7 through a key; the intermediate shaft 10 is connected with the second double eccentric sleeve 11 through a key.

Referring to fig. 10, the first cycloidal gear 6 and the pin teeth on the first pin gear 5 are meshed with each other, and the tooth difference is one tooth; the second cycloidal gear 13 and the needle teeth on the second needle gear 14 are engaged with each other, and the tooth difference is one tooth.

The two first cycloidal gears 6 do autorotation and cycloidal motion between the first roller bearing 8 and the first needle gear 5, and the direction of the two first cycloidal gears is opposite to the motion direction of the power transmission shaft 1; the two second cycloid gears 13 perform rotation and cycloid movements between the second roller bearing 12 and the second pin gear 14 in the opposite direction to the movement direction of the power transmission shaft 1.

The working principle of the utility model is as follows:

the utility model applies the planetary transmission principle and adopts cycloidal pin gear meshing transmission.

The power input shaft 1 drives the double eccentric sleeve 7 of the first speed reducing mechanism, and then drives the first roller bearings 8 on the first double eccentric sleeve 7 to rotate, the first cycloidal gears 6 are installed on the two first roller bearings 8, and drive the first cycloidal gears 6 to rotate, and the first cycloidal gears 6 and the first pin gears 5 are meshed with each other to form an internal meshing speed reducing mechanism with a tooth difference of one tooth, so that the friction resistance is effectively reduced, and the first pin gears 5 sleeved on the pin teeth of the speed reducer can do rotary motion, as shown in fig. 9. In this case, the first pin gear 5 is used as the center gear K, the first roller bearing 8 is used as the tie rod H, the first cycloid gear 6 is used as the planetary gear P, and the intermediate shaft 10 is used as the output mechanism V, which corresponds to a K-H-V type planetary transmission, as shown in fig. 10. When the first speed reducing mechanism moves, due to the limitation of a cycloid tooth profile curve, the rotation of the power input shaft 1 can be converted into cycloid motion and autorotation of the first cycloid gear 6, when the power input shaft 1 rotates for one circle, the first double eccentric sleeve 7 rotates for one circle, the first cycloid gear 6 rotates for one tooth along the opposite direction, so that speed reduction is obtained, the low-speed autorotation motion of the first cycloid gear 6 is transmitted to the intermediate shaft 10 through the first pin hole 21 and the first pin shaft 22, so that lower rotating speed is obtained, the intermediate shaft 10 further applies the same principle to carry out second speed reduction mechanism speed reduction, and lower speed is output by the power output shaft 16, and the second-stage cycloid pin gear speed reducer with high speed reduction ratio is formed.

The utility model can be widely applied to the mechanical field, is particularly suitable for the pumping unit of low-yield oil wells, has small volume and convenient transportation compared with the conventional pumping unit reducer, has half of teeth in meshed or half-meshed state during working, can bear larger force, has a special movement structure, has a great reduction ratio, can be used with very low stroke frequency in some low-yield oil wells, reduces energy consumption and improves system efficiency.

Claims

1. A two-stage cycloidal pin gear speed reducer with high speed reduction ratio comprises a power input shaft (1), a first speed reduction mechanism, an intermediate shaft (10), a second speed reduction mechanism and a power output shaft (16) which are connected in sequence; the method is characterized in that: the first speed reducing mechanism and the second speed reducing mechanism are arranged to meet the formula: output torque = input torque x gear ratio x gear efficiency;

the first speed reducing mechanism comprises a first pin gear shell (4), a first double eccentric sleeve (7), a first roller bearing (8), a first cycloidal gear (6) and a first pin gear (5) are sleeved between the first pin gear shell (4) and the power input shaft (1) from inside to outside in sequence, wherein the first pin gear (5) is meshed and connected between the first pin gear shell (4) and the first cycloidal gear (6);

the second speed reducing mechanism comprises a second pin gear shell (15), a second double eccentric sleeve (11), a second roller bearing (12), a second cycloidal gear (13) and a second pin gear (14) are sequentially sleeved between the second pin gear shell (15) and the intermediate shaft (10) from inside to outside, and the second pin gear (14) is meshed and connected between the second pin gear shell (15) and the second cycloidal gear (13).

2. The high reduction ratio two-stage cycloidal pin gear speed reducer of claim 1, wherein: two first roller bearings (8) are arranged on the first double eccentric sleeve (7), and two first cycloidal gears (6) are arranged on the two first roller bearings (8); two second roller bearings (12) are arranged on the second double eccentric sleeve (11), and two second cycloid gears (13) are arranged on the two second roller bearings (12).

3. The high reduction ratio two-stage cycloidal pin gear speed reducer according to claim 1 or 2, characterized in that: the first cycloidal gear (6) is meshed with the needle teeth on the first needle gear (5), and the tooth difference is one tooth; the second cycloidal gear (13) and the needle teeth on the second needle gear (14) are meshed with each other, and the tooth difference is one tooth.

4. A high reduction ratio two-stage cycloidal pin gear speed reducer according to claim 3, characterized in that: a plurality of first pin holes (21) are formed in the circumference of the first cycloid gear (6), and the first pin holes (21) are correspondingly connected with a plurality of first pins (22) arranged at the input end of the intermediate shaft (10).

5. A high reduction ratio two-stage cycloidal pin gear speed reducer according to claim 3, characterized in that: the circumference of the second cycloid gear (13) is provided with a plurality of second pin holes (23), and the second pin holes (23) are correspondingly connected with a plurality of second pins (24) arranged at the input end of the power output shaft (16).

6. The high reduction ratio two-stage cycloidal pin gear speed reducer of claim 1, wherein: the power input shaft (1) is connected with a left end cover (2) through a left end cover bearing (3); the output end of the power output shaft (16) is connected with a support bearing (17), the support bearing (17) is connected with a speed reducer box body (18), and the speed reducer box body (18) is connected with a right end cover (20) through a right end cover bearing (19).

7. The high reduction ratio two-stage cycloidal pin gear speed reducer of claim 1, wherein: the first needle gear shell (4) is connected with the second needle gear shell (15) through a needle gear shell connecting plate (9).