CN214465578U

CN214465578U - Crossed roller bearing with toothed inner ring

Info

Publication number: CN214465578U
Application number: CN202120369143.5U
Authority: CN
Inventors: 吴洪德; 杨奇能; 欧学国; 陈志广; 苏潮; 邵立伟; 黄德皇; 陈庆武
Original assignee: Zhongshan Research Institute Beijing Institute Of Technology; Zhongshan Waseda Technology Co ltd
Current assignee: Zhongshan Research Institute Beijing Institute Of Technology; Zhongshan Waseda Technology Co ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-10-22
Anticipated expiration: 2031-02-09

Abstract

The utility model discloses a crossed roller bearing with teeth on an inner ring, which comprises an outer ring, an inner ring and a plurality of rollers, wherein a raceway is arranged between the outer ring and the inner ring, and the rollers are sequentially arranged in the raceway in a mutually vertical and crossed way; the inner wall of the inner ring is divided into an upper part inner wall and a lower part inner wall which are respectively marked as an upper part inner wall and a lower part inner wall, the upper part inner wall is provided with inner teeth, the inner teeth are shifting teeth, and the tooth height of the shifting teeth is smaller than the tooth width. When the device works, the crossed roller bearing is arranged on the harmonic speed reducer, and the internal teeth are meshed with flexible gear teeth on the harmonic speed reducer to carry out transmission output. The crossed roller bearing and the steel wheel are integrated together, one part is reduced, the structure of the harmonic speed reducer is more compact, the rigidity is increased, and the size and the weight are reduced. Meanwhile, the tooth profile of the inner teeth adopts the modified teeth, the tooth profile is optimized, the risk of tooth breakage is reduced, larger load can be borne, and the running noise is smaller.

Description

Crossed roller bearing with toothed inner ring

Technical Field

The utility model relates to a cross roller bearing technical field especially relates to a cross roller bearing with tooth of inner circle.

Background

The harmonic speed reducer is widely applied to robots due to small volume, light weight and high precision. The existing harmonic speed reducer mainly comprises the following components: the device comprises a crossed roller bearing, a steel wheel, an output flange, a flexible gear and a wave generator. Wherein, the output flange and the steel wheel are connected with the inner ring of the crossed roller bearing through screws. However, the existing structure has the following defects:

(1) the number of superposed parts is large, so that the rigidity is easy to be insufficient, the installation is not concentric, and the length in the axial direction is relatively long, so that the volume is large;

(2) at present, the tooth profile on the steel wheel is high, so that fracture failure is easily caused, and the noise is also high.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a crossed roller bearing with teeth on the inner ring, which integrates the functions of a steel wheel, reduces the number of the mounted parts, increases the rigidity and has compact structure; and the tooth profile of the inner ring teeth is optimized, so that the bearing capacity is high, the teeth are not easy to break, and the noise is low.

The purpose of the utility model is realized by adopting the following technical scheme:

a crossed roller bearing with a toothed inner ring comprises an outer ring, an inner ring and a plurality of rollers, wherein a roller path is arranged between the outer ring and the inner ring, and the rollers are sequentially arranged in the roller path in a mutually vertical crossed manner; the inner wall of inner circle divide into upper and lower two parts, marks as upper portion inner wall and lower part inner wall respectively, the upper portion inner wall is provided with the internal tooth, the internal tooth is the tooth that shifts, the tooth height of the tooth that shifts is less than the tooth width.

Further, the rollers are cylindrical rollers, and the diameter and the height of the cylindrical rollers are equal.

Furthermore, for the inner ring, the end face close to the inner wall of the upper part is marked as the upper end face of the inner ring, and the upper end face of the inner ring longitudinally extends downwards and is provided with a flange mounting hole; and an outer ring mounting hole is formed in the outer ring.

Further, the height of the flange mounting hole is not less than the tooth height of the deflection tooth; the outer ring mounting hole longitudinally penetrates through the upper end face and the lower end face of the outer ring.

Furthermore, for the inner ring, the end face close to the inner wall of the lower part is recorded as the end face of the lower part of the inner ring, a roller mounting hole is formed in the end face of the lower part of the inner ring, and a hole plug is detachably arranged on the roller mounting hole.

Furthermore, the roller path structure further comprises a sealing ring, wherein the sealing ring is arranged above the roller path and between the outer ring and the inner ring, and the sealing ring is close to one side of the end face of the upper part of the inner ring.

Further, the axis of the outer ring and the axis of the inner ring are overlapped; the outer ring is of an integrally formed structure; the inner ring is of an integrally formed structure.

Further, the outer ring is a high-carbon chromium bearing steel outer ring; the inner ring is a high-carbon chromium bearing steel inner ring.

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

(1) the utility model provides a cross roller bearing with tooth of inner circle, during operation, cross roller bearing dress on the harmonic speed reducer, the meshing of the flexible gear tooth on the internal tooth of circle and the harmonic speed reducer carries out transmission output. The inner ring inner wall of the crossed roller bearing is toothed, which is equivalent to the function of integrating a steel wheel, the crossed roller bearing and the steel wheel are integrated together, one part is reduced, the structure of the harmonic speed reducer is more compact, the rigidity is increased, and the volume and the weight are reduced.

(2) The utility model provides a cross roller bearing that inner circle took tooth circles in and is provided with the internal tooth, and the profile of tooth of internal tooth has adopted the tooth that shifts, and the tooth height is less than the tooth width, has reduced the risk of disconnected tooth, can bear bigger load, and moving noise is littleer.

(3) The utility model provides a cross roller bearing with tooth of inner circle is applicable to the robot cooperation robot field, is particularly suitable for being used for small, the occasion of high rigidity.

Drawings

Fig. 1 is a cross-sectional view of a crossed roller bearing provided by an embodiment of the present invention;

fig. 2 is a schematic perspective view of a cross roller bearing according to an embodiment of the present invention;

fig. 3 is another schematic perspective view of a crossed roller bearing according to an embodiment of the present invention;

fig. 4 is a top view of a crossed roller bearing according to an embodiment of the present invention.

In the figure: 10. an inner ring; 11. internal teeth; 12. the end surface of the upper part of the inner ring; 13. a flange mounting hole; 14. the lower end face of the inner ring; 15. a roller mounting hole; 20. an outer ring; 21. an outer ring mounting hole; 30. a raceway; 40. a roller; 50. a seal ring; 60. and (4) plugging the hole.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

As shown in fig. 1-4, a crossed roller bearing with toothed inner ring comprises an outer ring 20, an inner ring 10 and a plurality of rollers 40, wherein a raceway 30 is arranged between the outer ring 20 and the inner ring 10, and the plurality of rollers 40 are sequentially arranged in the raceway 30 in a mutually perpendicular and crossed manner; the inner wall of the inner ring 10 is divided into an upper part inner wall and a lower part inner wall which are respectively marked as an upper part inner wall and a lower part inner wall, the upper part inner wall is provided with inner teeth 11, the inner teeth 11 are shifting teeth, and the tooth height of the shifting teeth is smaller than the tooth width.

When the device works, the crossed roller bearing is arranged on the harmonic speed reducer, and the internal teeth 11 are meshed with flexible gear teeth on the harmonic speed reducer to carry out transmission output. The crossed roller bearing and the steel wheel are integrated together, one part is reduced, the structure of the harmonic speed reducer is more compact, the rigidity is increased, and the size and the weight are reduced. Meanwhile, the tooth profile of the inner teeth 11 adopts the modified teeth, the tooth profile is optimized, the risk of tooth breakage is reduced, larger load can be borne, and the running noise is smaller.

In a preferred embodiment, the tooth height of the displaced teeth is shorter than that of the standard teeth, so that the risk of tooth breakage is further reduced, and the meshing capability is higher.

In a preferred embodiment, the rollers 40 are cylindrical rollers having a diameter and height equal to each other, ensuring rotational accuracy. Of course, the roller 40 may be provided as a tapered roller 40.

In a preferred embodiment, for the inner ring 10, an end surface close to the upper inner wall is referred to as an inner ring upper end surface 12, and the inner ring upper end surface 12 is longitudinally extended and provided with a flange mounting hole 13 downwards; the outer ring 20 is provided with an outer ring mounting hole 21. When the bearing is installed, the flange installation holes 13 are used for connecting and fixing the bearing inner ring 10 and the flange, and the outer ring installation holes 21 are used for installing and connecting the outer ring 20.

As a preferred embodiment, the height of the flange mounting hole 13 is not less than the tooth height of the shifted tooth; the outer ring mounting hole 21 penetrates the upper and lower end faces of the outer ring 20 in the longitudinal direction. By adopting the arrangement mode, the precision and the stability of the bearing installation are ensured.

In a preferred embodiment, an end surface of the inner ring 10 adjacent to the lower inner wall is referred to as an inner ring lower end surface 14, a roller mounting hole 15 is provided in the inner ring lower end surface 14, and a hole plug 60 is detachably provided in the roller mounting hole 15. The roller mounting hole 15 is used for loading the roller 40, and after the roller 40 is loaded, the roller mounting hole 15 is blocked by the hole plug 60 to prevent the roller 40 from falling out.

In a preferred embodiment, the bearing further comprises a seal ring 50, the seal ring 50 is arranged above the raceway 30 and between the outer ring 20 and the inner ring 10, and the seal ring 50 is close to the side of the upper end surface 12 of the inner ring. After the sealing ring 50 is pressed, the sealing ring 50 is firmly matched with the outer ring 20 and the inner ring 10 and cannot rotate along with the outer ring 20, and the friction torque between the inner lip of the sealing ring 50 and the inner ring 10 does not obviously fluctuate when the bearing rotates.

In a preferred embodiment, the axial center of the outer ring 20 and the axial center of the inner ring 10 overlap; the outer ring 20 is an integrally formed structure; the inner ring 10 is of an integrally formed structure. The inner ring 10 and the outer ring 20 are both integrated, so that the precision and the rigidity of the bearing are improved, and the defects of a split structure are overcome.

In a preferred embodiment, the outer ring 20 is a high carbon chromium bearing steel outer ring 20; the inner ring 10 is made of high-carbon chromium bearing steel 10, the GCr15 bearing steel has high hardness, uniform structure, good wear resistance and high contact fatigue performance, the guide roller 40 runs at high precision, and the bearing has long service life.

The embodiment of the utility model provides a cross roller bearing that tooth was taken to inner circle, during operation, cross roller bearing dress is on the harmonic speed reducer machine, and the internal tooth 11 on the inner circle 10 carries out transmission output with the meshing of flexbile gear tooth on the harmonic speed reducer machine. The inner wall of the inner ring 10 of the crossed roller bearing is provided with teeth, which is equivalent to the function of integrating a steel wheel, the crossed roller bearing and the steel wheel are integrated together, one part is reduced, the structure of the harmonic speed reducer is more compact, the rigidity is increased, and the volume and the weight are reduced. Meanwhile, the inner ring 10 of the crossed roller bearing is provided with the inner teeth 11, the tooth profile of the inner teeth 11 adopts the shifted teeth, the tooth height is smaller than the tooth width, the risk of tooth breakage is reduced, larger load can be borne, and the running noise is smaller.

The embodiment of the utility model provides a cross roller bearing that tooth was taken to inner circle is applicable to the robot cooperation robot field, is particularly suitable for being used for small, the occasion of high rigidity.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. A crossed roller bearing with a toothed inner ring comprises an outer ring, an inner ring and a plurality of rollers, wherein a roller path is arranged between the outer ring and the inner ring, and the rollers are sequentially arranged in the roller path in a mutually vertical crossed manner; the inner wall of the inner ring is divided into an upper part and a lower part which are respectively marked as an upper inner wall and a lower inner wall, the upper inner wall is provided with inner teeth, the inner teeth are shifting teeth, and the tooth height of the shifting teeth is smaller than the tooth width.

2. The inner race toothed cross roller bearing of claim 1 wherein said rollers are cylindrical rollers, said cylindrical rollers being of equal diameter and height.

3. The crossed roller bearing with teeth on the inner ring as claimed in claim 1, wherein, for the inner ring, the end surface close to the upper inner wall is marked as the upper end surface of the inner ring, and the upper end surface of the inner ring is provided with a flange mounting hole extending downwards in the longitudinal direction; and an outer ring mounting hole is formed in the outer ring.

4. The inner race toothed cross roller bearing of claim 3 wherein said flange mounting holes are threaded holes; the outer ring mounting hole is a through hole with a smooth wall surface.

5. The inner race toothed cross roller bearing of claim 3 wherein said flange mounting bore has a height no less than the tooth height of said indexing teeth; the outer ring mounting hole longitudinally penetrates through the upper end face and the lower end face of the outer ring.

6. The crossed roller bearing with teeth on the inner ring as claimed in claim 1, wherein, for the inner ring, an end surface close to the lower inner wall is referred to as inner ring lower end surface, the inner ring lower end surface is provided with roller mounting holes, and the roller mounting holes are detachably provided with hole plugs.

7. The crossed roller bearing with teeth on the inner ring as claimed in claim 3, further comprising a seal ring disposed above the raceway and between the outer ring and the inner ring, the seal ring being disposed adjacent to a side of an upper end surface of the inner ring.

8. The inner ring toothed cross roller bearing of claim 1, wherein the axial center of said outer ring and the axial center of said inner ring overlap; the outer ring is of an integrally formed structure; the inner ring is of an integrally formed structure.

9. The inner ring toothed cross roller bearing of claim 1, wherein said outer ring is a high carbon chromium bearing steel outer ring; the inner ring is a high-carbon chromium bearing steel inner ring.