CN220850588U - A planetary gear structure for planetary reducer - Google Patents

Abstract

A planetary gear structure for a planetary reducer comprises a primary planet carrier, a plurality of columns are fixed on the primary planet carrier, a plurality of primary planetary gears are rotatably connected to the columns, a primary sun gear shaft is passed through the center of the primary planet carrier, a primary sun gear meshing with the plurality of primary planetary gears is fixed at one end of the primary sun gear shaft, a primary gear ring is meshingly connected to the outer edges of the plurality of primary planetary gears, and a sealing end cover is installed at the edge of the primary gear ring; the planetary reducer drives the primary sun gear shaft to rotate, and at the same time, the primary sun gear on the primary sun gear shaft drives the plurality of primary planetary gears to rotate, and the primary planetary gears rotate around the inner teeth of the primary gear ring to achieve the purpose of speed reduction; the utility model has the advantages of simple structure, good reliability, good safety and low maintenance cost.

Description

A planetary gear structure for planetary reducer

Technical Field

The utility model relates to the technical field of planetary gears, in particular to a planetary gear structure used for a planetary reducer.

Background technique

The existing planetary reducer of the pitch mechanism of the dome silo has an unreasonable design of high-speed shaft load, which causes continuous wear of the first-stage sun gear during use, resulting in a large amount of iron filings inside the planetary reducer. The iron filings cause bearing damage during operation along with the lubricating oil, which in turn causes continuous damage to the first-stage planetary carrier. During the operation of the planetary reducer, the first-stage sun gear teeth break or cannot be normally engaged with the second-stage planetary gear for transmission. The stacker-reclaimer's reclaiming scraper directly falls onto the coal pile, damaging the reclaiming scraper arm, scraper and other equipment, which will have a major impact on production and may even cause dangerous accidents such as spontaneous combustion of stored coal in the silo. The existing solution is only to replace the internally damaged first-stage sun gear and planetary carrier, which cannot fundamentally solve the problem.

Summary of the invention

In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide a planetary gear structure for a planetary reducer, by increasing the shaft diameter of the first-stage sun gear shaft, increasing the tooth width of the first-stage sun gear and the first-stage planetary gear, and increasing the cross-sectional diameter of the column, adding a shaft shoulder to the first-stage sun gear to connect it with the center of the end cover, and opening a drainage groove on the first-stage sun gear shaft to drip in lubricating oil and facilitate the discharge of iron chips, so that the utility model has the advantages of simple structure, good reliability, good safety and low maintenance cost.

In order to achieve the above purpose, the technical solution adopted by the utility model is:

A planetary gear structure for a planetary reducer, comprising a primary planet carrier 2, a plurality of columns 7 are fixed on the primary planet carrier 2, a plurality of primary planetary gears 1 are rotatably connected to the columns 7, a primary sun gear shaft 3 is passed through the center of the primary planet carrier 2, a primary sun gear 6 meshing with the plurality of primary planetary gears 1 is fixed at one end of the primary sun gear shaft 3, a primary gear ring 4 is meshed and connected at the outer edges of the plurality of primary planetary gears 1, and a sealing end cover 5 is installed at the edge of one end of the primary gear ring 4.

One end of the primary sun gear shaft 3 on which the primary sun gear 6 is fixed is provided with a shaft shoulder 8 , and a shaft shoulder mounting hole 12 is opened at the center of the sealing end cover 5 , and the shaft shoulder mounting hole 12 is rotatably connected to the shaft shoulder 8 .

The primary sun gear shaft 3 includes a shaft body 9, and one end of the shaft body 9 close to the primary sun gear 3 is provided with a guide groove 10 for dripping lubricating oil or discharging worn iron chips, and the other end of the shaft body 9 is provided with a spline 11 for connecting to the power output end of the planetary reducer.

The shaft diameter of the shaft body 9 is 1.01-1.15 times that of the industry standard JB/T13605-2018.

The tooth width of the primary sun gear 6 is 1.1-1.8 times that of the national standard GB/T33923-2017.

The tooth width of the first-stage planetary gear 1 is 1.1-1.5 times that of the national standard GB/T33923-2017.

The cross-sectional diameter of the column 7 is 1.01-1.85 times that of the national standard GB/T33923-2017.

A plurality of bolt holes 13 for fixing the sealing end cover 5 are provided at the edge of the primary gear ring 4 .

Compared with the prior art, the beneficial effects of the present invention are:

1. By installing multiple primary planetary gears 1 on the primary planetary carrier 2, and inserting the primary sun gear shaft 3 into the center of the primary planetary carrier 2, the primary sun gear 6 is meshed with the primary planetary gear 1 to form a planetary gear structure, and finally the primary ring gear 4 is installed outside the primary planetary gear 1. Therefore, the structure of the utility model is simple.

2. By adding a shaft shoulder 8 to the primary sun gear shaft 3 and rotatably connecting it to the shaft shoulder mounting hole 12 at the center of the sealing cover 5, the problem of unstable operation of the load shaft in the prior art due to one end not being fixed is solved. Therefore, the utility model has the advantage of good reliability.

3. A guide groove 10 is provided on the shaft body 9 of the primary sun gear shaft 3 for dripping lubricating oil and facilitating the discharge of debris generated by the wear of the primary sun gear 6, thereby preventing the debris from damaging other structures, and thus making the utility model have the advantage of good safety.

4. By increasing the shaft diameter of the shaft body 9, the tooth width of the first-stage sun gear 6, the tooth width of the first-stage planetary gear 1 and the cross-sectional diameter of the column 7, the overall structural strength of the utility model is improved, the service life is increased, and the maintenance cost is saved.

In summary, the utility model adds a shoulder 8 on the first-stage sun gear shaft 3 in the planetary gear structure to cooperate with the shoulder mounting hole 12 in the center of the sealing cover 5, and opens a guide groove 10 on the shaft body 9 of the first-stage sun gear shaft 3 for dripping lubricating oil and facilitating the discharge of debris from the wear of the first-stage sun gear 6, thereby increasing the shaft diameter of the shaft body 9, the tooth width of the first-stage sun gear 6, the tooth width of the first-stage planetary gear 1 and the cross-sectional diameter of the column 7, and has the advantages of simple structure, good reliability, good safety and low maintenance cost.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the three-dimensional structure of the utility model without the sealing cover 5 .

FIG. 2 is a schematic diagram of the three-dimensional structure of the sealing cover 5 and the primary gear ring 4 of the utility model.

FIG3 is a schematic structural diagram of a primary sun gear shaft 3 of the present invention.

In the figure, 1. a first-stage planetary gear, 2. a first-stage planetary carrier, 3. a first-stage sun gear shaft, 4. a first-stage ring gear, 5. a sealing cover, 6. a first-stage sun gear, 7. a column, 8. a shoulder, 9. a shaft body, 10. a guide groove, 11. a spline, 12. a shoulder mounting hole, and 13. a bolt hole.

Detailed ways

The structural principle and working principle of the utility model are described in detail below in conjunction with the accompanying drawings.

Referring to Figure 1, a planetary gear structure for a planetary reducer includes a primary planet carrier 2, a plurality of columns 7 are fixed on the primary planet carrier 2, and the columns 7 are rotatably connected to a plurality of primary planetary gears 1 through bearings. A primary sun gear shaft 3 is passed through the center of the primary planet carrier 2, and a primary sun gear 6 meshing with a plurality of primary planetary gears 1 is fixed at one end of the primary sun gear shaft 3. A primary gear ring 4 is meshed and connected at the outer edges of the plurality of primary planetary gears 1, and a sealing end cover 5 is installed at the edge of one end of the primary gear ring 4.

Referring to Figures 2 and 3, one end of the first-stage sun gear shaft 3 on which the first-stage sun gear 6 is fixed is provided with a shoulder 8, and a shoulder mounting hole 12 is opened at the center of the sealing end cover 5. By installing a bearing in the shoulder mounting hole 12, the shoulder 8 is rotatably connected to the shoulder mounting hole 12. In this embodiment, the shaft diameter of the shoulder 8 is 25 mm, and GB/T276-94 deep groove ball bearing 6205-2Z is used to complete the cooperation with the reducer sealing end cover.

The first-stage sun gear shaft 3 includes a shaft body 9, and a shoulder 8 is provided on one end of the shaft body 9 close to the first-stage sun gear 3. A guide groove 10 is provided on the shaft body 9 near the shoulder 8 for dripping lubricating oil or discharging iron filings generated by the wear of the sun gear. A spline 11 for connecting to the power output end of the planetary reducer is provided at the other end of the shaft body 9. The shaft diameter of the shaft body 9 is 1.01-1.15 times that of the industry standard JB/T13605-2018. In this embodiment, the diameter of the shaft body 9 is increased from 30 mm to 46 mm to improve the shaft strength of the first-stage sun gear shaft 3.

The tooth width of the first-stage sun gear 6 is 1.1-1.8 times that of the national standard GB/T33923-2017. In this embodiment, the tooth width of the first-stage sun gear 6 is increased from 25 mm to 45 mm to reduce the contact stress on the first-stage sun gear 6, thereby extending its service life.

The tooth width of the first-stage planetary gear 1 is 1.1-1.5 times that of the national standard GB/T33923-2017, and the cross-sectional diameter of the column 7 is 1.01-1.85 times that of the national standard GB/T33923-2017. In this embodiment, the tooth width of the first-stage planetary gear 1 is increased from 30 mm to 45 mm. In order to reduce the mass of the first-stage planetary gear 1 after the transformation, the inner diameter of the first-stage planetary gear 1 is enlarged to 90 mm, and a 65-90 cylindrical roller bearing is selected. According to the selection of the bearing, the cross-sectional diameter of the column 7 on the first-stage planetary carrier 2 is increased from 35 mm to 65 mm. In order to improve the overall strength of the planetary carrier, the chassis of the first-stage planetary carrier 2 is thickened.

A plurality of bolt holes 13 for fixing the sealing end cover 5 are provided at the edge of the primary gear ring 4 , and bolts are passed through the bolt holes 13 to connect the primary gear ring 4 and the sealing end cover 5 , so as to improve the sealing performance of the utility model.

The working principle of the utility model is:

Install the primary planetary gear 1 on the column 7 on the primary planetary carrier 2, then insert the primary sun gear shaft 3 into the center of the primary planetary carrier 2, install the primary sun gear 6 on the primary sun gear shaft 3 and make it mesh with each primary planetary gear 1, then put the primary ring gear 4 on the outer periphery of multiple primary planetary gears 1, make the internal teeth of the primary ring gear 4 mesh with the external teeth of the primary planetary gear 1, then install the sealing end cover 5 on the primary ring gear 4, make the shoulder 8 on the primary sun gear shaft 3 penetrate into the bearing of the shoulder mounting hole 12 on the sealing end cover 5, finally use bolts to pass through the bolt holes 13 to fix the sealing end cover 5 and the primary ring gear 4, and finally install the spline 11 of the primary sun gear shaft 3 into the planetary reducer.

The planetary reducer drives the primary sun gear shaft 3 to rotate, and at the same time, the primary sun gear 6 on the primary sun gear shaft 3 drives multiple primary planetary gears 1 to rotate. The primary planetary gear 1 rotates around the inner teeth of the primary gear ring 4 to achieve the purpose of deceleration. The other end of the primary sun gear shaft 3 is fixed by inserting the shoulder 8 on the primary sun gear shaft 3 into the shoulder mounting hole 12 to prevent the primary sun gear shaft 3 from shaking during rotation and causing wear of the primary sun gear 6.

Claims (8)

1. A planetary gear structure for a planetary reducer, comprising a primary planet carrier (2), characterized in that a plurality of columns (7) are fixed on the primary planet carrier (2), the columns (7) are rotatably connected with a plurality of primary planetary gears (1), a primary sun gear shaft (3) is passed through the center of the primary planet carrier (2), a primary sun gear (6) meshing with the plurality of primary planetary gears (1) is fixed at one end of the primary sun gear shaft (3), a primary gear ring (4) is meshed and connected with the outer edges of the plurality of primary planetary gears (1), and a sealing end cover (5) is installed at the edge of one end of the primary gear ring (4). 2. A planetary gear structure for a planetary reducer according to claim 1, characterized in that one end of the first-stage sun gear shaft (3) on which the first-stage sun gear (6) is fixed is provided with a shoulder (8), and a shoulder mounting hole (12) is opened at the center of the sealing end cover (5), and the shoulder mounting hole (12) is rotatably connected to the shoulder (8). 3. A planetary gear structure for a planetary reducer according to claim 1 or 2, characterized in that the first-stage sun gear shaft (3) includes a shaft body (9), and a guide groove (10) for dripping lubricating oil or discharging worn iron chips is provided on one end of the shaft body (9) close to the first-stage sun gear (6), and a spline (11) for connecting to the power output end of the planetary reducer is provided on the other end of the shaft body (9). 4. A planetary gear structure for a planetary reducer according to claim 3, characterized in that the shaft diameter of the shaft body (9) is 1.01-1.15 times that of the industry standard JB/T13605-2018. 5. A planetary gear structure for a planetary reducer according to claim 1 or 2, characterized in that the tooth width of the primary sun gear (6) is 1.1-1.8 times that of the national standard GB/T33923-2017. 6. A planetary gear structure for a planetary reducer according to claim 1, characterized in that the tooth width of the first-stage planetary gear (1) is 1.1-1.5 times that of the national standard GB/T33923-2017. 7. A planetary gear structure for a planetary reducer according to claim 1, characterized in that the cross-sectional diameter of the column (7) is 1.01-1.85 times that of the national standard GB/T33923-2017. 8. A planetary gear structure for a planetary reducer according to claim 1, characterized in that a plurality of bolt holes (13) for fixing the sealing end cover (5) are provided at the edge of the primary gear ring (4).