CN202152830U - Planetary reducer - Google Patents

Abstract

The utility model discloses a planetary reducer comprising a shell, an input shaft and a transmission shaft, wherein the right end of the transmission shaft extends into the shell; a cavity is arranged at the right end of the transmission shaft; a planetary gear is arranged between the left side wall and the right side wall of the cavity; a first through hole is arranged in the right side wall of the cavity; a sun gear is arranged at the left end of the input shaft, then penetrates through the first through hole and is meshed with the planetary gear; a cylindrical connecting part is fixedly arranged on the right end surface of the transmission shaft; a rolling bearing is arranged between the connecting part and the shell; and a second through hole is arranged in the center of the connecting part. The planetary reducer has the advantages that as the connecting part is supported by the right end of the transmission shaft, and the size of the connecting part can be smaller than that of the transmission shaft, a smaller rolling bearing can be used, and the machining difficulty is reduced; and simultaneously, as the connecting part is not limited by materials of the transmission shaft, the production cost can be reduced.

Description

Planetary reducer

technical field

The utility model relates to a planetary reducer.

Background technique

The existing planetary reducer includes a casing, an input shaft, and a transmission shaft. The right end of the transmission shaft extends into the casing, and a cavity is opened at the right end of the transmission shaft. For the gear, the right side wall of the cavity has a first through hole, the left end of the input shaft is provided with a sun gear, the sun gear passes through the first through hole and meshes with the planetary gear, and the middle and right parts of the transmission shaft are provided with rolling bearings, but Because there is a cavity in the right part of the transmission shaft, and a planetary gear is arranged in the cavity, the size of the right part of the transmission shaft is relatively large, which makes the size of the rolling bearing also large, which increases the production cost, and the installation of the planetary gear is relatively large. difficulty.

Utility model content

The purpose of the utility model is to provide a planetary reducer, which can effectively solve the problem that the size of the rolling bearing used at the right end of the transmission shaft of the existing planetary reducer is too large, which increases the production cost.

In order to solve the above-mentioned technical problems, the utility model is realized through the following technical solutions: the planetary reducer includes a casing, an input shaft, and a transmission shaft. The right end of the transmission shaft extends into the casing, and the right end of the transmission shaft is opened. There is a cavity, at least one planetary gear is arranged between the left side wall and the right side wall of the cavity, a first through hole is opened on the right side wall of the cavity, and a sun gear is arranged at the left end of the input shaft , the sun gear meshes with the planetary gear through the first through hole, the casing is provided with an inner ring gear, the planetary gear meshes with the inner ring gear, and the right end surface of the transmission shaft is fixed with a cylindrical connecting block , A rolling bearing is provided between the connection block and the casing, and a second through hole is opened in the center of the connection block.

Preferably, the connection block is fixedly connected to the transmission shaft through bolts; the connection method is reliable and the operation is simple.

Preferably, a rolling bearing is also provided between the input shaft and the casing; so that the input shaft is well supported and can rotate well.

Preferably, there are three planetary gears, and the three planetary gears are evenly distributed; more stable transmission.

Preferably, both the left side wall and the right side wall of the cavity are provided with shaft through holes for setting planetary gear shafts; this facilitates the installation of the planetary gears and simplifies the installation steps.

Compared with the prior art, the utility model has the advantages that the right end of the transmission shaft is supported by the connection block, so that the size of the connection block can be made smaller than that of the transmission shaft, so that smaller rolling bearings can be used to reduce processing difficulty, and at the same time The connection block is not limited by the material of the transmission shaft, which can reduce the production cost.

Description of drawings

Fig. 1 is the structural representation of the utility model planetary reducer;

Fig. 2 is a sectional view of the transmission shaft in the planetary reducer of the present invention;

Fig. 3 is a schematic diagram of the connection of the transmission shaft, the planetary gear and the connecting block in the planetary reducer of the present invention.

Detailed ways

Referring to Fig. 1, Fig. 2 and Fig. 3 are embodiments of the planetary reducer of the present invention. The planetary reducer includes a casing 1, an input shaft 2, and a transmission shaft 3. The right end of the transmission shaft 3 extends into the casing 1 , the right end of the transmission shaft 3 has a cavity 4, three planetary gears 5 are evenly distributed between the left side wall and the right side wall of the cavity 4, and the right side wall of the cavity 4 has a first A through hole 42, the left end of the input shaft 2 is provided with a sun gear 6, and the sun gear 6 passes through the first through hole 42 to mesh with the planetary gear 5, and the casing 1 is provided with an inner ring gear 11, the The planetary gear 5 meshes with the ring gear 11, and the right end surface of the transmission shaft 3 is fixed with a cylindrical connection block 7, and a rolling bearing 8 is arranged between the connection block 7 and the casing 1, and the center of the connection block 7 has a The second through hole, the connecting block 7 is fixedly connected with the transmission shaft 3 through the bolt 9, a rolling bearing 8 is also arranged between the input shaft 2 and the casing 1, the left side wall and the right side wall of the cavity 4 There are through shaft holes 41 for setting planetary gear shafts 51 on them.

The input shaft 2 drives the sun gear 6 to rotate, drives the transmission shaft 3 to output power by meshing with the planetary gear 5, and supports the right end of the transmission shaft 3 through the connecting block 7, so that the size of the connecting block 7 can be made smaller than the transmission shaft 3, so that Smaller rolling bearings 8 can be used to reduce processing difficulty, and at the same time, the connection block 7 is not limited by the material of the transmission shaft 3, which can reduce production costs.

The above is only a specific embodiment of the utility model, but the technical characteristics of the utility model are not limited thereto, and any changes or modifications made by those skilled in the art within the scope of the utility model are all covered by the utility model. In the scope of the new patent.

Claims (5)

1. planetary speed reducer comprises casing (1), input shaft (2), transmission shaft (3), and the right-hand member of said transmission shaft (3) stretches in the casing (1); The right-hand member of said transmission shaft (3) has cavity (4); Be provided with at least one planetary pinion (5) between the left side wall of said cavity (4) and the right side wall, the right side wall of said cavity (4) has first through hole (42), and the left end of said input shaft (2) is provided with sun gear (6); Said sun gear (6) passes first through hole (42) and planetary pinion (5) engagement; Said casing (1) is provided with ring gear (11), said planetary pinion (5) and ring gear (11) engagement, and it is characterized in that: the right side of said transmission shaft (3) is fixed with cylindrical contiguous block (7); Be provided with rolling bearing (8) between said contiguous block (7) and the casing (1), said contiguous block (7) center has second through hole (71).

2. planetary speed reducer as claimed in claim 1 is characterized in that: said contiguous block (7) is fixedly connected with transmission shaft (3) through bolt (9).

3. planetary speed reducer as claimed in claim 1 is characterized in that: also be provided with rolling bearing (8) between said input shaft (2) and the casing (1).

4. planetary speed reducer as claimed in claim 1 is characterized in that: said planetary pinion (5) has three, and said three planetary pinions (5) evenly distribute.

5. planetary speed reducer as claimed in claim 1 is characterized in that: all have the axis hole (41) that planet pin (51) is set on the left side wall of said cavity (4) and the right side wall.

Images