CN206419450U - Ultra-thin harmonic reducer - Google Patents

Abstract

The utility model discloses an ultra-thin harmonic reducer, it includes rigid gear, flexbile gear, harmonic bearing, oval cam and cross roller bearing, oval cam sets up on the inner circle of harmonic bearing, and the fixed part of flexbile gear passes through the fix with screw on the inner circle of cross roller bearing, and the deformation part cover of this flexbile gear is established on the outer lane of harmonic bearing, and the rigid gear passes through the fix with screw on the outer lane of cross roller bearing, and the internal tooth on this rigid gear and the external tooth looks adaptation on the deformation part of flexbile gear; the utility model discloses structural design is ingenious, rationally circles the elliptical cam setting at the inner race of harmonic bearing, and the harmonic bearing is located the deformation part of flexbile gear, realizes overlapping the assembly with a plurality of parts on coplanar space, effective make full use of space for overall structure is more compact, and then simplifies overall structure, and reduce cost and weight reduction make holistic volume also corresponding dwindle, reduces installation occupation space, does benefit to the lightweight and the miniaturization of equipment.

Description

Ultra-thin harmonic reducer

technical field

The utility model relates to the technical field of harmonic reducers, in particular to an ultra-thin harmonic reducer.

Background technique

The harmonic reducer is mainly composed of three basic components: a wave generator, a flexible gear and a rigid gear. Gear transmission that transmits motion and power. Harmonic reducers have unique advantages such as high load capacity, large transmission ratio, small size, stable transmission and high transmission precision. Based on these advantages, harmonic reducers are widely used in electronics, aerospace, robotics and other industries.

However, for the existing harmonic reducer to be applied to projects that require mass and volume space, such as lunar vehicles, artificial satellites, missiles, rockets, and space manipulators, it is necessary to further improve the structure of the existing harmonic reducer. Optimized for size reduction. Compared with the original harmonic reducer, the total volume of the simple harmonic reducer designed by the inventor is greatly reduced, which is of great significance.

Utility model content

In view of the above shortcomings, the purpose of this utility model is to provide an ultra-thin harmonic reducer with ingenious and reasonable structural design, small volume and less space.

In order to achieve the above object, the technical solution provided by the utility model is:

An ultra-thin harmonic reducer, which includes a rigid spline, a flexspline, a harmonic bearing, an elliptical cam and a crossed roller bearing, the elliptical cam is arranged on the inner ring of the harmonic bearing, and the fixing of the flexspline The part is fixed on the inner ring of the crossed roller bearing by screws, the deformed part of the flexible spline is sleeved on the outer ring of the harmonic bearing, and the rigid wheel is fixed on the outer ring of the crossed roller bearing by screws, and the The internal teeth on the rigid spline match the external teeth on the deformable part of the flexible spline.

As an improvement of the utility model, an O-ring is provided between the rigid wheel and the outer ring of the crossed roller bearing.

As an improvement of the utility model, the outer position between the outer ring and the inner ring of the crossed roller bearing is provided with a skeleton oil seal.

The beneficial effects of the utility model are: the utility model has an ingenious structural design, and the elliptical cam is reasonably arranged on the inner ring of the harmonic bearing, and the harmonic bearing is located in the deformation part of the flexspline, so that multiple components can be placed in the same plane space Overlapping assembly is carried out on the top, effectively and fully utilizing the space, making the overall structure more compact, thereby simplifying the overall structure, reducing cost and weight, reducing the overall volume accordingly, reducing the installation space, and facilitating the lightweight and miniaturization of equipment. It is conducive to wide popularization and application, and is especially suitable for technical fields such as aerospace and aviation.

Below in conjunction with accompanying drawing and embodiment, the utility model is further described.

Description of drawings

Fig. 1 is a front structural schematic view of the utility model.

Fig. 2 is a schematic cross-sectional structure diagram of the utility model.

detailed description

Referring to Fig. 1 and Fig. 2, an ultra-thin harmonic reducer provided by this embodiment includes a rigid spline 1, a flexible spline 2, a harmonic bearing 3, an elliptical cam 4 and a crossed roller bearing 5, and the elliptical The cam 4 is set on the inner ring 31 of the harmonic bearing 3, the fixed part 21 of the flexspline 2 is fixed on the inner ring 51 of the crossed roller bearing 5 by screws, and the deformable part 22 of the flexspline 2 is sleeved on the harmonic On the outer ring 32 of the wave bearing 3, the rigid wheel 1 is fixed on the outer ring 52 of the cross roller bearing 5 by screws, and the inner teeth on the rigid wheel 1 and the outer teeth on the deformed part 22 of the flexible wheel 2 match. Preferably, the elliptical cam 4 is provided with an assembly shaft. The inner ring 51 of the crossed roller bearing 5 is a solid structure. One surface of the inner ring 51 facing the elliptical cam 4 is provided with an inner fitting recess, and the opposite surface is provided with an outer fitting recess. The purpose of setting the inner assembly recess is to bring convenience to the installation and avoid interference with the installation shaft located on the assembly shaft. There are external assembly recesses. On the basis of ensuring the overall structural strength, it can effectively reduce materials, weight and cost, and at the same time bring convenience to installation.

Preferably, an O-ring 6 is provided between the rigid wheel 1 and the outer ring 52 of the crossed roller bearing 5 to effectively improve the tightness of the fit. A skeleton oil seal 53 is provided at the outer position between the outer ring 52 and the inner ring 51 of the crossed roller bearing 5 to prevent foreign matter from entering between the outer ring 52 and the inner ring 51, and at the same time make the lubricating oil loss, effectively extending the The service life of the crossed roller bearing 5.

When in use, since the ultra-thin harmonic reducer of the utility model reasonably arranges the elliptical cam 4 on the inner ring 31 of the harmonic bearing 3, and the harmonic bearing 3 is located in the deformation part 22 of the flexspline 2, realizing multiple components Overlapping assembly is carried out on the same plane space, thereby reducing the occupied thickness space, realizing the purpose of ultra-thin structure design, effectively making full use of space, making the overall structure more compact, thereby simplifying the overall structure, reducing cost and weight, and making the overall structure The volume is also reduced accordingly, reducing the installation space, which is conducive to the lightweight and miniaturization of equipment, and is especially suitable for aerospace, aviation and other technical fields.

According to the disclosure and teaching of the above specification, those skilled in the art to which the present utility model belongs can also change and modify the above embodiment. Therefore, the utility model is not limited to the specific implementation manners disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description, and do not constitute any limitation to the present invention. Reducers with other structures that are the same or similar to them are within the protection scope of the present invention. .

Claims (3)

1. a kind of ultrathin harmonic speed reducer, it is characterised in that it includes firm gear, flexbile gear, harmonic rolling beering, elliptic cam and intersection Roller bearing, the elliptic cam is arranged on the inner ring of harmonic rolling beering, and the fixed part of the flexbile gear is fixed by screws in On the inner ring of crossed roller bearing, the deformation part of the flexbile gear is set on the outer ring of harmonic rolling beering, and the firm gear passes through screw It is fixed on the outer ring of crossed roller bearing, and the internal tooth in the firm gear is adapted with the external tooth on the deformation part of flexbile gear.

2. ultrathin harmonic speed reducer according to claim 1, it is characterised in that：The firm gear and crossed roller bearing O-ring is provided between outer ring.

3. ultrathin harmonic speed reducer according to claim 1 or 2, it is characterised in that：Outside the crossed roller bearing Outer fix between circle and inner ring is provided with outside framework oil seal.