CN216200211U - Planetary reducer - Google Patents

Abstract

The utility model relates to a planetary reducer which comprises a shell, a planetary reduction set, an input gear, a bearing, a retainer ring, an output shaft, a tightening piece and a connecting plate, wherein the input gear is arranged on the shell; the bearing is arranged in the bearing chamber, is equipped with the viscose layer that bonds in the periphery wall of outer lane, the inner wall of bearing chamber simultaneously between the periphery wall of its outer lane and the inner wall of bearing chamber, the viscose layer can guarantee that the planet reducing gear box uses the back for a long time, and the bearing is still firm. The retaining ring is fixed in the bearing chamber, be equipped with the viscose layer that bonds simultaneously in the terminal surface of retaining ring, the terminal surface of bearing inner race between the terminal surface of retaining ring and the bearing inner race, further prescribe a limit to the bearing, make the bearing installation more firm.

Description

Planetary reducer

Technical Field

The utility model relates to a speed reducer, in particular to a planetary speed reducer.

Background

The planetary reduction gearbox (planetary reducer) is an industrial product with wide application, and can reduce the rotating speed of a motor and increase the output torque. The planetary gear set generally comprises an inner gear ring, a planet carrier, a planetary gear, a gasket, an output shaft, a bearing and other structures. The bearing is arranged in the bearing chamber, and after the planetary reduction gearbox runs for a certain time, the bearing is easy to loosen, so that the service life of the planetary reduction gearbox is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention has been developed to provide a planetary reducer that overcomes or at least partially solves the above-mentioned problems.

The planetary reduction gear includes:

the bearing device comprises a shell, a bearing seat and a bearing seat, wherein internal teeth are formed on the inner peripheral wall of a cylindrical space in the shell, a bearing chamber is formed at the front end of the shell, and an opening is formed at the rear end of the shell;

a planetary reduction set disposed within the cylindrical space of the housing; the planetary gear is meshed with internal teeth of the inner peripheral wall of the cylindrical space;

an input gear meshed with the planetary gear near the rear end of the housing;

the bearing is arranged in the bearing chamber, and an adhesive layer which is simultaneously bonded to the outer peripheral wall of the outer ring and the inner wall of the bearing chamber is arranged between the outer peripheral wall of the outer ring and the inner wall of the bearing chamber;

the check ring is fixed in the bearing chamber and used for blocking the bearing from moving, and an adhesive layer which is simultaneously bonded on the end face of the check ring and the end face of the bearing outer ring is arranged between the end face of the check ring and the end face of the bearing outer ring;

the output shaft is supported by a bearing, and the input end of the output shaft is inserted into a mounting hole in the center of the planet carrier close to the bearing chamber;

the tightening piece is provided with a through hole, is tightly sleeved on the output shaft through the through hole and comprises a blocking part and a pressing part; the blocking part is positioned outside the shell and can be abutted against the end face of the shell to limit the axial movement of the output shaft; the pressing part presses against the end face of the inner ring of the bearing;

the connecting plate is fixedly arranged at the opening of the shell.

Optionally, the blocking portion is generally annular and is tightly fitted over the output shaft.

Optionally, the pressing part is generally annular and tightly sleeved on the output shaft.

Optionally, the number of the bearings is two, and the bearings are adjacently arranged in the bearing chamber.

Optionally, the input gear comprises a gear portion, the gears of the gear portion meshing with the planet gears near the rear end of the housing; the input gear further comprises a disc-shaped end table portion, the end table portion is located on one side, close to the rear end of the shell, of the input gear, the gear portion and the end table portion are arranged coaxially, and the diameter of the end table portion is larger than the diameter of an addendum circle of the gear portion.

Optionally, both the connecting plate and the housing are connected by screws.

In the embodiment of the utility model, the adhesive layer which is simultaneously bonded on the outer peripheral wall of the outer ring and the inner wall of the bearing chamber is arranged between the outer peripheral wall of the outer ring of the planetary speed reducer and the inner wall of the bearing chamber, and the adhesive layer can ensure that the bearing is still stable after the planetary speed reducer is used for a long time. Be equipped with the viscose layer that bonds simultaneously in the terminal surface of retaining ring, the terminal surface of bearing inner race between the terminal surface of planetary reducer's retaining ring and the terminal surface of bearing inner race, further prescribe a limit to the bearing, make the bearing installation more firm.

In one embodiment, the shell of the planetary reducer is processed by a heat treatment process before assembly, and the planetary gears, the planet carrier and the input gear of the planetary reducer are all formed by injection molding of stainless steel powder and subjected to heat treatment to enhance the rigidity and the wear resistance.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a perspective view of an exemplary embodiment of a planetary reducer of the present invention;

FIG. 2 is a cross-sectional view of the planetary transmission shown in FIG. 1;

FIG. 3 is an exploded view of the planetary reducer of FIG. 1;

FIG. 4 is a perspective view of the take up member of FIG. 1;

fig. 5 is a perspective view of the end platform portion shown in fig. 3.

Description of reference numerals: 1. a housing; 2. an input gear; 3. a bearing; 4. a retainer ring; 5. an output shaft; 6. a tightener; 7. a connecting plate; 8. a planet carrier; 9. positioning pins; 10. a planetary gear; 11. a blocking portion; 12. a pressing part; 13. a gear portion; 14. an end table portion.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below are exemplary embodiments for explaining the present invention with reference to the drawings and should not be construed as limiting the present invention, and those skilled in the art can make various changes, modifications, substitutions and alterations to the embodiments without departing from the principle and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

The terms "central," "longitudinal," "lateral," "length," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like, referred to or as may be referred to in the description of the utility model, are used in the indicated orientation or positional relationship indicated in the drawings for convenience in describing the utility model and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, the terms "comprises," "comprising," and any variations thereof, are intended to cover non-exclusive inclusions.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A planetary reducer according to an embodiment of the present invention is described below with reference to the accompanying drawings.

Referring to fig. 1 to 3, a planetary reducer according to an embodiment of the present invention includes a housing 1, a planetary reduction set, an input gear 2, a bearing 3, a retainer ring 4, an output shaft 5, a tightening member 6, and a connecting plate 7.

Internal teeth are formed on the inner peripheral wall of the cylindrical space inside the housing 1, a bearing chamber is formed at the front end of the housing 1, and an opening is formed at the rear end of the housing 1. Corresponding to the view of fig. 2, the upper end of the housing 1 is formed with a bearing chamber, and the lower end of the housing 1 is formed with an opening.

The planetary reduction set is arranged in the cylindrical space of the housing 1 and comprises N planetary carriers 8, N being a positive number, and planetary gears 10 rotatably mounted to the positioning pins 9 of the planetary carriers 8. The planetary gear 10 is engaged with the internal teeth of the inner circumferential wall of the cylindrical space.

In this embodiment, N is 3, that is, the planetary reduction set is a three-stage planetary reduction set, which is a first-stage planetary reduction set, a second-stage planetary reduction set, and a third-stage planetary reduction set, and each of the three-stage planetary reduction sets includes a carrier 8 and a plurality of planetary gears 10 rotatably mounted on the carrier 8. The input gear 2 meshes with the planetary gears 10 near the rear end of the housing 1, i.e., with the planetary gears 10 of the first stage planetary reduction set. It should be understood that N may be selected from other positive numbers, which are not listed here.

The bearing 3 is arranged in the bearing chamber, and an adhesive layer which is bonded to the outer peripheral wall of the outer ring and the inner wall of the bearing chamber at the same time is arranged between the outer peripheral wall of the outer ring and the inner wall of the bearing chamber.

During actual assembly, can paint mightiness glue in the periphery wall of bearing 3, arrange bearing 3 in the bearing room afterwards, after the mightiness glue solidification, form the viscose layer promptly, fix bearing 3. The viscose layer is additionally arranged, so that the bearing 3 can still be stable after the planetary reduction gearbox is used for a long time.

In this embodiment, the number of the bearings 3 is two, and the bearings are adjacently arranged in the bearing chamber.

The retaining ring 4 is fixed in the bearing chamber and used for blocking the bearing 3 from moving, and an adhesive layer which is simultaneously bonded on the end face of the retaining ring 4 and the end face of the outer ring of the bearing 3 is arranged between the end face of the retaining ring 4 and the end face of the outer ring of the bearing 3.

During actual assembly, arrange in the bearing chamber at bearing 3 after, can paint mightiness glue in an end face of retaining ring 4, the end face that will paint mightiness glue is towards bearing 3 and is close to bearing 3, after the mightiness glue solidification, forms the viscose layer promptly, further prescribes a limit to bearing 3 through retaining ring 4, makes the installation of bearing 3 more firm.

The retainer ring 4 and the bearing chamber can be fixed in an interference fit mode, and can also be fixed in a mode that a viscose glue is coated on the periphery of the retainer ring 4 to form an adhesive layer between the periphery of the retainer ring 4 and the inner wall of the bearing chamber, or fixed in other suitable modes.

The output shaft 5 is supported by the bearing 3, and the input end of the output shaft is inserted into a mounting hole at the center of the planet carrier 8 close to the bearing chamber.

In the present embodiment, the input end of the output shaft 5 is inserted into a mounting hole at the center of the planet carrier 8 of the third-stage planetary reduction set.

The tightening piece 6 is formed with a through hole, and is tightly sleeved on the output shaft 5 through the through hole, and comprises a blocking part 11 and a pressing part 12. The blocking portion 11 is located outside the housing 1 and can abut against an end surface of the housing 1, corresponding to the view point of fig. 2, that is, the blocking portion 11 can abut against an upper end surface of the housing 1, and is used for limiting the axial movement of the output shaft 5. The pressing part 12 presses against the end face of the inner ring of the bearing 3.

Referring now to fig. 4, in the present embodiment, the blocking portion 11 is generally annular, and the pressing portion 12 is generally annular, both of which are tightly fitted on the output shaft 5. Preferably, the tightener 6 is manufactured in an integral molding process.

Returning now to fig. 1 to 3, the connecting plate 7 is fixedly mounted at the opening of the housing 1.

In this embodiment, the connecting plate 7 and the casing 1 are detachably connected by screws, and when the planetary reducer is assembled with the motor, the connecting plate 7 may be fixed to the motor housing by a connecting member, such as a screw, and then the input gear 2 is sleeved on the rotating shaft of the motor, and finally the connecting plate 7 is fixed to the casing 1 (the rest of the parts of the planetary reducer installed in the casing 1) by screws. Of course, the input gear 2 may be sleeved on the rotating shaft of the motor, and then the connecting plate 7 may be fixed to the motor housing through the connecting member.

In one embodiment, the housing 1 is processed by a heat treatment process before assembly, and the planetary gears 10, the planet carrier 8 and the input gear 2 are all formed by injection molding of stainless steel powder and heat treatment is performed to enhance the rigidity and the wear resistance.

The input gear 2 includes a gear portion 13, and gears of the gear portion 13 are engaged with the planetary gears 10 near the rear end of the housing 1, that is, with the planetary gears 10 of the first stage planetary reduction set. The input gear 2 further includes a disk-shaped end table portion 14, the end table portion 14 is located on a side of the input gear 2 near the rear end of the housing 1, the gear portion 13 is arranged coaxially with the end table portion 14, and a diameter of the end table portion 14 is larger than a tip circle diameter of the gear portion 13. When the input gear 2 is injection molded using stainless steel powder, the end land portion 14 can be used for gate placement.

Claims (6)

1. A planetary reducer, comprising:

the bearing device comprises a shell, a bearing seat and a bearing seat, wherein internal teeth are formed on the inner peripheral wall of a cylindrical space in the shell, a bearing chamber is formed at the front end of the shell, and an opening is formed at the rear end of the shell;

a planetary reduction set disposed within the cylindrical space of the housing; the planetary gear is meshed with internal teeth of the inner peripheral wall of the cylindrical space;

an input gear meshed with the planetary gear near the rear end of the housing;

the bearing is arranged in the bearing chamber, and an adhesive layer which is simultaneously bonded to the outer peripheral wall of the outer ring and the inner wall of the bearing chamber is arranged between the outer peripheral wall of the outer ring and the inner wall of the bearing chamber;

the check ring is fixed in the bearing chamber and used for blocking the bearing from moving, and an adhesive layer which is simultaneously bonded on the end face of the check ring and the end face of the bearing outer ring is arranged between the end face of the check ring and the end face of the bearing outer ring;

the output shaft is supported by a bearing, and the input end of the output shaft is inserted into a mounting hole in the center of the planet carrier close to the bearing chamber;

the tightening piece is provided with a through hole, is tightly sleeved on the output shaft through the through hole and comprises a blocking part and a pressing part; the blocking part is positioned outside the shell and can be abutted against the end face of the shell to limit the axial movement of the output shaft; the pressing part presses against the end face of the inner ring of the bearing;

the connecting plate is fixedly arranged at the opening of the shell.

2. The planetary reducer according to claim 1, wherein: the blocking part is generally annular and tightly sleeved on the output shaft.

3. The planetary reducer according to claim 2, wherein: the pressing part is generally annular and is tightly sleeved on the output shaft.

4. The planetary reducer according to claim 1, wherein: the number of the bearings is two, and the bearings are adjacently arranged in the bearing chamber.

5. The planetary reducer according to claim 1, wherein: the input gear includes a gear portion, a gear of the gear portion being engaged with the planetary gear near the rear end of the housing; the input gear further comprises a disc-shaped end table portion, the end table portion is located on one side, close to the rear end of the shell, of the input gear, the gear portion and the end table portion are arranged coaxially, and the diameter of the end table portion is larger than the diameter of an addendum circle of the gear portion.

6. The planetary reducer according to any one of claims 1 to 5, wherein: the connecting plate is connected with the shell through screws.

Images