CN210889935U

CN210889935U - RV speed reducer

Info

Publication number: CN210889935U
Application number: CN201920990508.9U
Authority: CN
Inventors: 尹子栋
Original assignee: Chengdu Aeronautic Polytechnic
Current assignee: Chengdu Aeronautic Polytechnic
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-06-30
Anticipated expiration: 2029-06-26

Abstract

The utility model belongs to the technical field of RV reduction gears, especially be an RV reduction gear, including casing, upper planet carrier dish and lower wall, be provided with first outer lane ball bearing and second outer lane ball bearing in the casing, be provided with the lower wall respectively in first outer lane ball bearing and the second outer lane ball bearing and go up the planet carrier dish, be provided with cylindrical roller bearing on the lower wall; the utility model discloses, through planetary gear, the bent axle, first cycloid gear, the setting of second cycloid gear, first outer lane ball bearing, the combined action of second outer lane ball bearing and main shaft etc, the one-level speed reduction utilizes planetary gear to decelerate, the belt pulley is connected to the motor, input torque transmits for planet wheel through the main shaft, carry out first speed reduction, the second grade speed reduction utilizes the bent axle to decelerate, after planetary gear rotates, transmit the bent axle with torque transmission through the key transmission, the translation is done to bent axle rotation drive first cycloid gear and second cycloid gear, reach the speed reduction purpose.

Description

RV speed reducer

Technical Field

The utility model belongs to the technical field of the RV reduction gear, concretely relates to RV reduction gear.

Background

The RV transmission is a brand new transmission mode, is developed on the basis of the traditional needle pendulum planetary transmission, overcomes the defects of the common needle pendulum transmission, and has a series of advantages of small volume, light weight, large transmission ratio range, long service life, stable precision, high efficiency, stable transmission and the like. The RV reducer is widely applied to the fields of industrial robots, machine tools, medical detection equipment, satellite receiving systems and the like due to the advantages of small size, strong impact resistance, large torque, high positioning accuracy, small vibration, large reduction ratio and the like of the RV reducer, which is formed by a cycloidal pin gear and a planet carrier. Compared with a harmonic reducer, the RV reducer has higher rigidity and rotation precision. In many countries in the world, RV reducers are mostly used for transmission of high-precision equipment, such as industrial robots, numerical control machines, semiconductor equipment, precision packaging equipment, medical instruments, radars and the like.

The reduction gear product that industrial robot used mainly has 3 types, is RV reduction gear, harmonic speed reducer, cycloid pin wheel reduction gear respectively, and wherein, on the RV reduction gear was applicable to heavy load robot, because present stage industrial joint robot demand still uses heavy load as leading, therefore the RV reduction gear occupies most demands, but current RV reduction gear receives too big impact load influence easily, is difficult to guarantee its life-span.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides a RV reduction gear has solved the problem that proposes in the technical background.

In order to achieve the above object, the utility model provides a following technical scheme: an RV reducer comprises a shell, an upper planet carrier disc and a lower disc, wherein a first outer ring ball bearing and a second outer ring ball bearing are arranged in the shell, a lower disc and an upper planet carrier disc are respectively arranged in the first outer ring ball bearing and the second outer ring ball bearing, the lower disc is provided with a cylindrical roller bearing, the upper planet carrier disc is provided with a planet gear in the shell, one end of the planetary gear is fixedly connected with a crankshaft, the other end of the crankshaft is movably arranged in the cylindrical roller bearing in a penetrating way, a first cycloid ball bearing and a second cycloid ball bearing are movably arranged on the outer surface of the crankshaft in a penetrating way, and the outer surfaces of the first and second cycloid ball bearings are fixedly connected with a first cycloid gear and a second cycloid gear, the lower disc, the first cycloid gear, the second cycloid gear and the upper planet carrier disc are fixedly connected with the same spindle.

Preferably, certain spaces are reserved between the first cycloid gear and the lower disc and between the second cycloid gear and the upper planet carrier disc.

Preferably, the crankshaft is a three-crankshaft.

Preferably, the number of the planetary gears is three, and the three planetary gears are uniformly distributed on the upper planet carrier disc.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses, through planetary gear, the bent axle, first cycloid gear, the setting of second cycloid gear, first outer lane ball bearing, the combined action of second outer lane ball bearing and main shaft etc, the one-level speed reduction utilizes planetary gear to decelerate, the belt pulley is connected to the motor, input torque transmits for planet wheel through the main shaft, carry out first speed reduction, the second grade speed reduction utilizes the bent axle to decelerate, after planetary gear rotates, transmit the bent axle with torque transmission through the key transmission, the translation is done to bent axle rotation drive first cycloid gear and second cycloid gear, reach the speed reduction purpose.

2. The utility model discloses, through first cycloid gear and lower wall and second cycloid gear and go upward leave the setting in space between the planet carrier dish, reached radiating purpose, adopt three crankshafts and planet wheel to constitute second grade speed reduction system, compact structure, it is efficient to slow down, convenient assembling reduces to the technological accuracy requirement of last planet carrier dish simultaneously, and production cycle shortens, and processing cost reduces.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a section of an RV reducer of the present invention;

FIG. 2 is a schematic structural diagram of the RV reducer according to the present invention in side view;

in the figure: 1. a bottom wall; 2. a cylindrical roller bearing; 3. a first cycloidal ball bearing; 4. a first outer ring ball bearing; 5. a housing; 6. a second outer race ball bearing; 7. a first cycloid gear; 8. a second cycloid gear; 9. a main shaft; 10. a second cycloidal ball bearing; 11. a crankshaft; 12. a planetary gear; 13. an upper planet carrier disk.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

Referring to fig. 1-2, the present invention provides the following technical solutions: an RV reducer comprises a shell 5, an upper planet carrier disc 13 and a lower disc 1, wherein a first outer ring ball bearing 4 and a second outer ring ball bearing 6 are arranged in the shell 5, the lower disc 1 and the upper planet carrier disc 13 are respectively arranged in the first outer ring ball bearing 4 and the second outer ring ball bearing 6, a cylindrical roller bearing 2 is arranged on the lower disc 1, a planetary gear 12 is arranged on the upper planet carrier disc 13 in the shell 5, the stress condition of the reducer is reduced through small tooth difference, so that the purposes of large transmission ratio and large torque are achieved, one end of the planetary gear 12 is fixedly connected with a crankshaft 11, the other end of the crankshaft 11 is movably arranged in the cylindrical roller bearing 2 in a penetrating manner, a first cycloid ball bearing 3 and a second cycloid ball bearing 10 are movably arranged on the outer surface of the crankshaft 11 in a penetrating manner, and a first cycloid gear 7 and a second cycloid gear 8 are fixedly connected with the outer surfaces of the first cycloid ball bearing 3 and the second cycloid ball bearing 10, the lower disc 1, the first cycloid gear 7, the second cycloid gear 8 and the upper planet carrier disc 13 are fixedly connected with the same spindle 9, the first outer ring ball bearing 4, the second outer ring ball bearing 6, the spindle 9 and the like are arranged through the planet gear 12, the crankshaft 11, the first cycloid gear 7 and the second cycloid gear 8, the first outer ring ball bearing 12 is used for reducing speed, the motor is connected with the belt pulley, input torque is transmitted to the planet gear through the spindle 9 to carry out first speed reduction, the second speed reduction is carried out through the crankshaft 11, after the planet gear 12 rotates, the torque is transmitted to the crankshaft 11 through key transmission, and the crankshaft 11 rotates to drive the first cycloid gear 7 and the second cycloid gear 8 to move horizontally, so that the speed reduction purpose is achieved.

Specifically, certain spaces are reserved between the first cycloid gear 7 and the lower disc 1 and between the second cycloid gear 8 and the upper planet carrier disc 13, so that the heat dissipation effect is good.

Specifically, the crankshaft 11 is a three-crankshaft.

Specifically, there are three in the quantity of planetary gear 12, and three the even distribution of planetary gear 12 is on last planet carrier dish 13, makes output power distribution comparatively even, and the structure is simple high-efficient more.

The utility model discloses a theory of operation and use flow: the utility model discloses, at the process of using, the one-level speed reduction utilizes planetary gear 12 to reduce speed, and the belt pulley is connected to the motor, and input torque transmits for planet wheel through main shaft 9, carries out the first speed reduction, and the second grade speed reduction utilizes bent axle 11 to reduce speed, after planetary gear 12 rotates, transmits torque for bent axle 11 through the key transmission, and bent axle 11 rotates and drives first cycloid gear 7 and second cycloid gear 8 and do the translation, reaches the speed reduction purpose.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a RV reduction gear, includes casing (5), goes up planet carrier dish (13) and lower wall (1), its characterized in that: a first outer ring ball bearing (4) and a second outer ring ball bearing (6) are arranged in the shell (5), a lower disc (1) and an upper planet carrier disc (13) are respectively arranged in the first outer ring ball bearing (4) and the second outer ring ball bearing (6), a cylindrical roller bearing (2) is arranged on the lower disc (1), a planetary gear (12) is arranged on the upper planet carrier disc (13) in the shell (5), one end of the planetary gear (12) is fixedly connected with a crankshaft (11), the other end of the crankshaft (11) is movably arranged in the cylindrical roller bearing (2) in a penetrating manner, a first cycloid ball bearing (3) and a second cycloid ball bearing (10) are movably arranged on the outer surface of the crankshaft (11) in a penetrating manner, and a first cycloid gear (7) and a second cycloid gear (8) are fixedly connected with the outer surfaces of the first cycloid ball bearing (3) and the second cycloid ball bearing (10), the lower disc (1), the first cycloid gear (7), the second cycloid gear (8) and the upper planet carrier disc (13) are fixedly connected with the same main shaft (9).

2. A RV reducer according to claim 1, characterized by: certain spaces are reserved between the first cycloid gear (7) and the lower disc (1) and between the second cycloid gear (8) and the upper planet carrier disc (13).

3. A RV reducer according to claim 1, characterized by: the crankshaft (11) is a three-crankshaft.

4. A RV reducer according to claim 1, characterized by: the number of the planetary gears (12) is three, and the three planetary gears (12) are uniformly distributed on the upper planet carrier disc (13).