Novel helical tooth type planetary reducer

Abstract

The novel helical tooth type planetary reducer comprises a small end cover, a front end cover, a sun gear, three planet gears, an inner gear and a rear end cover, a rotating frame is arranged on the inner side of the front end cover, the rotating frame comprises a rotating disc and an output shaft connected with the rotating disc, the front end cover comprises a front cover and a bearing sleeve, and the bearing sleeve is connected with the front cover. The output shaft is sleeved with an oil seal A installed in an inner cavity of the small end cover, the sun gear is provided with a coupler connected with the motor, and a second bearing is arranged between the coupler and the rear end cover. The output shaft is provided with more than one first bearing A, a first bearing B and an oil seal B, wherein the first bearing A, the first bearing B and the oil seal B are sequentially arranged outwards from the side close to the rotating disc, the first bearing B is located at the end, away from the front cover, of the bearing sleeve, and the oil seal B is located on the inner side of the first bearing B. The speed reducer has the advantages that the speed reducer is suitable for use working conditions of low rotating speed and large load; the service life is effectively prolonged, the overall maintenance cost is reduced, and the requirements of customers for the planetary reducer can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of planetary reducers, in particular to a novel helical-tooth planetary reducer. Background Art

[0002] Planetary reducers are widely used in industrial products due to their small size, light weight, high load-bearing capacity, long service life, stable operation, low noise, large output torque, large speed ratio, high efficiency, and safe performance. At present, some of the reducers used in fish pond aerators are planetary reducers. Since fish pond aerators require a low speed but a large load, most of the planetary gears of planetary reducers are currently installed through bearings. After a period of use, due to the wear of the bearings, gaps are easily generated between the gears, which will deflect and reduce the accuracy, thereby shortening the service life.

[0003] The applicant applied for a patent on July 7, 2021, application number: 202121539694.8, patent name: A helical planetary reducer. During the use of this product, it was found that impurities such as mud, sand or fishing line occasionally broke through the oil seal on the small end cover during the transmission of the output shaft and were twisted into the bearing along the output shaft. Some impurities even entered the planetary gears, causing fatal wear on the bearings and planetary gears, greatly reducing the service life of the product; and during use, the radial force of the output shaft is large, and the bearings are severely worn after long-term use, and debris in the bearings will also enter the planetary gears along the output shaft. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a novel helical-tooth planetary reducer with high precision and improved service life.

[0005] The technical solution to achieve the purpose of the utility model is: a new type of helical planetary reducer, including a small end cover, a front end cover, a sun gear, three planetary gears, an internal gear and a rear end cover, a rotating frame is provided on the inner side of the front end cover, the rotating frame includes a rotating disk and an output shaft connected to the rotating disk, the front end cover includes a front cover and a bearing sleeve, the output shaft sleeve is provided with an oil seal A installed in the inner cavity of the small end cover, the planetary gear is provided on the rotating disk through a planetary pin, the sun gear is provided with a coupling connected to the motor, the rear end cover is sleeved on the coupling, a second bearing is provided between the coupling and the rear end cover, and a shaft sleeve is provided between the planetary gear and the planetary pin, characterized in that: the output shaft is provided with more than one first bearing A arranged in sequence outward from the side close to the rotating disk, a first bearing B located at the end of the bearing sleeve away from the front cover, and an oil seal B located on the inner side of the first bearing B.

[0006] The oil seal B is adjacent to the first bearing B, and the number of the first bearings A is equal to that which can cover the area from the output shaft close to the rotating disk to the oil seal B.

[0007] When the number of the first bearings A is more than two, a first snap ring for position limitation and arranged on the hole wall of the bearing sleeve is provided between two adjacent first bearings A.

[0008] The first bearing B adopts a deep groove ball bearing.

[0009] The bushing and the planet gear are in interference fit, and the bushing and the planet pin are in clearance fit.

[0010] A gasket located between the planet gear and the rotating disc is sleeved on the planet pin.

[0011] There are more than two second bearings.

[0012] An oil seal C located between the second bearing and the sun gear is sleeved on the coupling.

[0013] The sun gear and the coupling are integrally formed.

[0014] The helical planetary reducer of the utility model has the following beneficial effects: the output shaft is provided with two oil seals and the first bearing B, which greatly improves the probability of preventing external impurities from entering the planet gear and reduces the oil leakage. The first bearing B adopts a deep groove ball bearing, and impurities can be ground during the rotation process, and most of the ground impurities are thrown to the oil seal A. At the same time, the oil seal B can block most of the ground impurities, reducing the chance of wear of the first bearing A and the planet gear caused by external impurities; the output shaft is covered with the first bearings A, which can increase its rigidity and reduce the chance of damage of the first bearings A; increasing the number of the second bearings and the oil seal C can improve the stability of the coupling during the transmission process and reduce the oil leakage; the easily worn parts in the planet gear assembly are the bushing, the planet pin, the gasket, etc., reducing the maintenance cost; it is applicable to the working conditions of low speed and large load, effectively improving the service life and reducing the overall maintenance cost, and can improve the customer's demand for the planetary reducer. Description of the Drawings

[0015] The following combines the drawings and embodiments to make a detailed description of the utility model;

[0016] Figure 1 is the structural schematic diagram of the utility model;

[0017] Figure 2 is the left side schematic diagram of the utility model;

[0018] Figure 3 is the exploded structural schematic diagram of the utility model;

[0019] Figure 4 is Figure 2 the sectional structural schematic diagram of A-A in

[0020] Figure 5 Yes Figure 4 It is a schematic enlarged view of the structure at position I in the figure. Specific implementation manner

[0021] As Figures 1 to 5 As shown in the figure, the new type of helical planetary reducer includes a small end cover 1, a front end cover 2, a sun gear 3, three planetary gears 4, an internal gear 5 and a rear end cover 6. A rotating frame 7 is provided inside the front end cover 2. The rotating frame 7 includes a rotating disk 7.1 and an output shaft 7.2 connected to the rotating disk 7.1. One end of the output shaft 7.2 away from the rotating disk 7.1 passes through the end of the small end cover 1. The front end cover 2 includes a front cover 2.1 and a bearing sleeve 2.2. The output shaft 7.2 is sleeved with two oil seals A 8 installed in the inner cavity of the small end cover 1. The planetary gears 4 are arranged on the rotating disk 7.1 through planetary pins 9. The sun gear 3 is provided with a coupling 10 connected to the motor. The rear end cover 6 is sleeved on the coupling 10. A second bearing 11 is provided between the coupling 10 and the rear end cover 6. A bushing 12 is provided between the planetary gear 4 and the planetary pin 9. The output shaft 7.2 is provided with more than 1 first bearing A 13 arranged in sequence outward from the side close to the rotating disk 7.1, a first bearing B 14 located at the end of the bearing sleeve 2.2 away from the front cover 2.1, and an oil seal B 15 located inside the first bearing B 14.

[0022] The oil seal B 15 is next to the first bearing B 14. The number of the first bearings A 13 is equal to the number that can fill the space between the side of the output shaft 7.2 close to the rotating disk 7.1 and the oil seal B 15. The first bearing A 13 can be a deep groove ball bearing or a roller bearing or a mixture of the two types of bearings. In this embodiment, the preferred number is five, and deep groove ball bearings are used.

[0023] When the number of the first bearings A 13 is more than two, a first circlip 16 for position limitation and arranged on the inner wall of the hole of the bearing sleeve 2.2 is provided between two adjacent first bearings A 13.

[0024] The first bearing B 14 is a deep groove ball bearing.

[0025] The bushing 12 and the planetary gear 4 are in interference fit, and the bushing 12 and the planetary pin 9 are in clearance fit. This can reduce the wear chance of the planetary gear 4 and lower the later maintenance cost.

[0026] The planetary pin 9 is sleeved with a gasket 17 located between the planetary gear 4 and the rotating disk 7.1. This can reduce the wear between the planetary gear 4 and the rotating disk 7.1 and lower the later maintenance cost.

[0027] More than two of the second bearings 11 are provided, and a second circlip 18 for position limitation and arranged on the hole wall of the rear end cover 6 is provided between two adjacent second bearings 11.

[0028] An oil seal C 19 located between the second bearing 11 and the sun gear 3 is sleeved on the coupling 10, and a third circlip 20 arranged on the hole wall of the rear end cover 6 is provided on one side of the oil seal close to the sun gear.

[0029] The sun gear 3 and the coupling 10 are integrally formed.

[0030] The rear end cover 6 is provided with a flange 21 fixedly connected to the motor and detachable.

[0031] A fixed seat 5.1 is provided on the outside of the internal gear 5.

Claims

1. A novel helical gear planetary reducer, comprising a small end cover, a front end cover, a sun gear, three planetary gears, an internal gear and a rear end cover, wherein a rotating frame is arranged inside the front end cover, the rotating frame comprises a rotating disk and an output shaft connected to the rotating disk, the front end cover comprises a front cover and a bearing sleeve, the output shaft sleeve is provided with an oil seal A installed in the inner cavity of the small end cover, the planetary gear is arranged on the rotating disk through a planetary pin, the sun gear is provided with a coupling connected to the motor, the rear end cover is sleeved on the coupling, a second bearing is arranged between the coupling and the rear end cover, and a shaft sleeve is arranged between the planetary gear and the planetary pin, characterized in that: The output shaft is provided with one or more first bearings A arranged outward in sequence from the side close to the rotating disk, a first bearing B located at the end of the bearing sleeve away from the front cover, and an oil seal B located inside the first bearing B.

2. The novel helical gear planetary reducer according to claim 1 is characterized in that: The oil seal B is adjacent to the first bearing B, and the number of the first bearings A is equal to that which can cover the area from the output shaft close to the rotating disk to the oil seal B.

3. The novel helical-tooth planetary reducer according to claim 1 or 2, characterized in that: When the number of the first bearings A is more than two, a first retaining spring for limiting the position and arranged on the wall of the bearing sleeve hole is provided between two adjacent first bearings A.

4. The novel helical gear planetary reducer according to claim 1 is characterized in that: The first bearing B is a deep groove ball bearing.

5. The novel helical gear planetary reducer according to claim 1 is characterized in that: The shaft sleeve and the planetary gear are in interference fit, and the shaft sleeve and the planetary pin are in clearance fit.

6. The novel helical gear planetary reducer according to claim 1 is characterized in that: The planetary pin sleeve is provided with a gasket located between the planetary wheel and the rotating disk.

7. The novel helical gear planetary reducer according to claim 1 is characterized in that: There are two or more second bearings.

8. The novel helical gear planetary reducer according to claim 1 is characterized in that: The coupling sleeve is provided with an oil seal C located between the second bearing and the sun gear.

9. The novel helical gear planetary reducer according to claim 1 is characterized in that: The sun gear and the coupling are integrally formed.

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