阅读说明：本技术 一种超轻量型滚子交叉轴承 (ultra-light roller crossed bearing ) 是由 周清泉 杨立群 肖凤才 于 2019-10-08 设计创作，主要内容包括：本发明公开了一种超轻量型滚子交叉轴承,包括轴承内圈32,所述轴承内圈32外仅安装有一个轴承外圈31；轴承内圈32与轴承外圈31之间安装有滚子交叉圆柱43；轴承外圈31上成形有与柔轮5的第一螺栓孔33；轴承内圈32上成形有与输出法兰42相连的第二螺栓孔34；所述滚子交叉轴承为负游隙；轴承外圈31和轴承内圈32之间安装有骨架油封35。本发明将交叉滚子轴承所占空间缩减了10％以上,且通过轴承盖固定骨架油封,保证其密封性的同时基本没有扩大交叉滚子轴的体积；最外侧的宽度尺寸由18mm变为9.4mm,而滚道半径尺寸不变,使得其重量与体积大大的减少。(The invention discloses an ultra-light roller crossed bearing, which comprises a bearing inner ring 32, wherein only one bearing outer ring 31 is arranged outside the bearing inner ring 32; a roller cross cylinder 43 is arranged between the bearing inner ring 32 and the bearing outer ring 31; a first bolt hole 33 corresponding to the flexible gear 5 is formed on the bearing outer ring 31; a second bolt hole 34 connected with the output flange 42 is formed on the bearing inner ring 32; the roller cross bearing is a negative clearance; and a framework oil seal 35 is arranged between the bearing outer ring 31 and the bearing inner ring 32. The invention reduces the occupied space of the crossed roller bearing by more than 10%, and fixes the framework oil seal through the bearing cover, thereby ensuring the sealing performance without enlarging the volume of the crossed roller shaft; the width dimension of the outermost side is changed from 18mm to 9.4mm, while the radius dimension of the roller path is unchanged, so that the weight and the volume of the roller path are greatly reduced.)

1. The ultra-light roller crossed bearing comprises a bearing inner ring (32), and is characterized in that only one bearing outer ring (31) is mounted outside the bearing inner ring (32); a roller crossed cylinder (43) is arranged between the bearing inner ring (32) and the bearing outer ring (31); a first bolt hole (33) which is matched with the flexible gear (5) is formed on the bearing outer ring (31); a second bolt hole (34) connected with the output flange (42) is formed in the bearing inner ring (32); the roller cross bearing is a negative clearance; and a framework oil seal (35) is arranged between the bearing outer ring (31) and the bearing inner ring (32).

2. The ultra lightweight roller cross bearing of claim 1, wherein said skeleton oil seal (35) is secured by a bearing cap (36).

3. Ultra lightweight roller cross bearing according to claim 1, characterized in that the width of the inner bearing ring (32) is larger than the width of the outer bearing ring (31).

4. Ultra lightweight roller cross bearing according to claim 4, characterized in that the width of the inner bearing ring (32) is 16.5 ± 0.5mm and the width of the outer bearing ring (31) is 9.4 mm.

5. Ultra lightweight roller cross bearing according to claim 4, characterized in that the width of the inner bearing ring (32) is larger than the width of the outer bearing ring (31) and each is formed with a V-groove for engagement with a roller cross cylinder (43).

The technical field is as follows:

The invention relates to the technical field of harmonic reducers, in particular to an ultra-light harmonic reducer.

background art:

The harmonic reducer is a gear drive which utilizes the wave generator to make the flexible gear generate controllable elastic deformation and is meshed with the rigid gear to transfer motion and power. The harmonic reducer has the unique advantages of high bearing capacity, large transmission ratio, small volume, stable transmission, high transmission precision and the like, and is widely applied to the industries of electronics, aerospace, aviation, robots and the like based on the advantages.

However, the existing harmonic reducer is too heavy and the flexspline is too loaded, so the company invented a harmonic reducer with lighter weight, in which a cross roller bearing is used, but the existing cross roller bearing is usually provided with two outer rings, and the volume and the weight of the existing cross roller bearing are both larger.

The invention content is as follows:

The invention aims to provide an ultra-light harmonic reducer, which reduces the occupied space of a crossed roller bearing by more than 10%, and a framework oil seal is fixed through a bearing cover, so that the sealing performance is ensured, and the volume of a crossed roller shaft is not basically enlarged; the width dimension of the outermost side is changed from 18mm to 9.4mm, while the radius dimension of the roller path is unchanged, so that the weight and the volume of the roller path are greatly reduced.

in order to solve the problems, the technical scheme of the invention is as follows:

An ultra-light roller cross bearing comprises a bearing inner ring 32, wherein only one bearing outer ring 31 is arranged outside the bearing inner ring 32; a roller cross cylinder 43 is arranged between the bearing inner ring 32 and the bearing outer ring 31; a first bolt hole 33 corresponding to the flexible gear 5 is formed on the bearing outer ring 31; a second bolt hole 34 connected with the output flange 42 is formed on the bearing inner ring 32; the roller cross bearing is a negative clearance; and a framework oil seal 35 is arranged between the bearing outer ring 31 and the bearing inner ring 32.

In a further improvement, the framework oil seal 35 is fixed by a bearing cover 36.

in a further improvement, the width of the bearing inner ring 32 is larger than that of the bearing outer ring 31.

In a further improvement, the width of the bearing inner ring 32 is 16.5 +/-0.5 mm, and the width of the bearing outer ring 31 is 9.4 mm.

in a further improvement, the bearing inner race 32 is wider than the bearing outer race 31 and is formed with V-shaped grooves that mate with the roller cross cylinders 43.

The invention has the advantages that:

The invention reduces the occupied space of the crossed roller bearing by more than 10%, and fixes the framework oil seal through the bearing cover, thereby ensuring the sealing performance without enlarging the volume of the crossed roller shaft; the width dimension of the outermost side is changed from 18mm to 9.4mm, while the radius dimension of the roller path is unchanged, so that the weight and the volume of the roller path are greatly reduced.

Description of the drawings:

FIG. 1 is a schematic diagram of the overall structure of an ultra-lightweight harmonic reducer;

Fig. 2 is a schematic view of the overall structure of the roller cross bearing.

The specific implementation mode is as follows:

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.