TWM577079U - Speed-reduction transmission bearing - Google Patents

Abstract

A reduction transmission bearing, in particular to a composite bearing design with a reduction transmission function, comprising a flexible inner bearing and a rigid outer bearing; the outer annular surface of the flexible inner bearing is formed with a ring of external teeth and in the axial direction of the outer ring The extension portion is provided with a plurality of elastic slots and a radial flange, and the inner ring of the flexible inner bearing provides a harmonic cam assembly for power input; the inner annular surface of the rigid outer bearing is formed with a ring of internal teeth and internal teeth Actuating with the external teeth of the flexible inner bearing; thereby, the rigid outer bearing can be selected for the outer ring for decelerating force engagement, and the flexible inner bearing and the rigid inner bearing are rigid under the rotation of the power input harmonic cam The outer bearings act to reduce the transmission between each other.

Description

Reducer drive bearing

The present invention relates to a reduction transmission bearing, in particular to a reduction mechanism of a composite bearing arrangement, which directly forms a transmission state of the tooth difference engagement by the flexible inner bearing and the rigid outer bearing of the reduction transmission bearing, so that the reduction transmission bearing has a simpler structure.

The conventional harmonic reduction reducer (harmonic reducer) is composed of a rigid outer ring gear, a flexible inner ring gear and a harmonic cam. The inner ring surface of the rigid outer ring gear is provided with internal teeth and a flexible inner ring gear. The outer ring surface is provided with external teeth, the flexible inner ring gear is disposed in the rigid outer ring gear, and the harmonic cam is disposed in the flexible inner ring gear, so that the harmonic cam abuts against the flexible inner ring gear, so that the flexible inner ring gear A portion of the external teeth engage the internal teeth of the rigid outer ring gear. When it is installed and used, the motor output power shaft is connected to the harmonic cam, and the flexible inner tooth ring is driven to rotate in the rigid outer ring gear through the rotating action of the harmonic cam, so that the flexible inner ring gear is converted into a low-speed power output. In this way, the harmonic reduction reducer can be applied to the field of high load and low speed demand, such as the shaft joints of the robot arm.

However, the power transmission mode in which the motor and the harmonic reduction reducer are connected in series with the shaft portion tends to cause the overall axial length to be too long, so that the installation space of the motor and the harmonic reduction reducer needs to be accommodated in a large size, and the disadvantageous mechanism planning. For this reason, there is a case of a rotary actuator proposed in Taiwan Patent Publication No. 201626696, and it is desirable to accommodate a motor with a hollow type harmonic gear device in order to achieve the purpose of reducing the axial size of the rotary actuator. However, the tooth width of the toothed transmission of the harmonic gear device disclosed in the above-mentioned case, the structural component of the limited flexible detuning driving tooth structure, can not have better power transmission, and the torque output value of the rotary actuator is also not available. Better performance, less load capacity.

The creator is adhering to the spirit of research and development, and expects harmonic reduction bearings to have excellent performance in torque output under the condition of reducing axial size, so that the overall application of harmonic reduction bearings is more extensive. The technology that the creation should actively expose.

The purpose of the present invention is to provide a reduction drive bearing, which is composed of a simple composite bearing meshing by a reduction drive bearing, which achieves more complete meshing transmission of internal and external teeth, and is capable of direct power transmission and a more compact overall structure.

In order to achieve the above object, the reduced speed transmission bearing of the present invention comprises: a flexible inner bearing and a rigid outer bearing which are rotatably axially sleeved together, the flexible inner bearing and the rigid outer bearing respectively have an outer ring , an inner ring, and a plurality of rollers disposed between each of the outer ring and the inner ring; the outer ring of the outer ring of the flexible inner bearing has a ring of external teeth, and one end of the outer ring of the flexible inner bearing An axially extending ring, and a radial flange extending radially from the axially extending ring end, the axially extending ring is provided with a plurality of slots, each of the slots forming a connection between the flexible inner bearings And an elastic deformation portion of the radial flange; the inner ring of the inner ring of the rigid outer bearing has a ring of internal teeth that mesh with external teeth of the flexible inner bearing; and an inner ring of the flexible inner bearing A harmonic cam is embedded in the middle set, and the harmonic cam rotation causes the flexible inner bearing and the rigid outer bearing to generate a decelerating transmission function with each other.

In the above reduction drive bearing, the number of teeth of the external teeth of the flexible inner bearing is smaller than the number of teeth of the inner teeth of the rigid outer bearing.

In the above reduction drive bearing, the slit is a strip-shaped slit extending along the circumferential direction of the axially extending ring, and the two ends of the strip-shaped slit respectively form a hole.

In the above reduction drive bearing, the outer ring of the rigid outer bearing and the radial flange are respectively provided with perforations capable of piercing the fixing member.

In the above reduction drive bearing, the roller of the flexible inner bearing is a ball.

In the above reduction drive bearing, the roller of the rigid outer bearing is a roller, and the outer diameters of the outer rollers are arranged at a vertical angle.

The decelerating transmission bearing of the present invention is composed of a simple composite bearing meshing by a reduction drive bearing, and the internal and external teeth are more fully meshed and transmitted, and the direct power transmission and the overall structure are more streamlined.

In order to fully understand the purpose, characteristics and efficacy of this creation, the structural features and other functions and purposes of this creation are described in detail in the following examples:

Referring to FIG. 1 , FIG. 2 and FIG. 3 , the reduced speed transmission bearing of the present invention is a reduction transmission bearing having a reduction transmission and a bearing function supporting a power input shaft or a power output shaft, and preferred embodiments thereof mainly include a flexible inner bearing 10 and a rigid outer bearing 20, the flexible inner bearing 10 and the rigid outer bearing 20 respectively have an outer ring 11, 21, an inner ring 12, 22, and each of the outer ring 11, 21 and a plurality of rollers 13, 23 between the inner rings 12, 22, the outer ring 11 of the flexible inner bearing 10 has a smaller diameter than the inner ring 22 of the rigid outer bearing 20, such that the flexible inner bearing 10 and the The rigid outer bearings 20 are rotatably axially nested with each other.

Referring to FIG. 2 to FIG. 4, the flexible inner bearing 10 is made of a flexible material, and has an outer ring 11 and an inner ring 12. The outer ring surface of the outer ring 11 of the flexible inner bearing 10 is specially formed with a ring outer tooth. 14. One end of the flexible inner bearing 10 and an axially extending ring 15 and a radial flange 16 extending radially from the end of the axially extending ring 15; the portion of the axially extending ring 15 is provided a plurality of slits 17, which are strip-shaped slits 171 extending in the circumferential direction of the axially extending ring 15, and the ends of the strip-shaped slits 171 are respectively formed with a hole 172, whereby an elastic deformation portion 18 connecting the outer ring 11 and the radial flange 16 is formed between the slits 17.

Referring to FIGS. 2 to 4, the rigid outer bearing 20 is made of a rigid material having an outer ring 21 and an inner ring 22, and the inner ring surface of the inner ring 22 has a larger diameter than the outer ring of the outer ring 11 of the flexible inner bearing 10. The diameter of the surface is such that the rigid outer bearing 20 is axially fitted to the outer annular surface of the flexible inner bearing 10, and the inner annular surface of the rigid outer bearing 20 is formed with a ring of inner teeth 24 corresponding to the outer teeth 14, thereby passing through Driving of a harmonic cam (not shown) disposed in the flexible inner bearing 10 causes the outer teeth 14 of the flexible inner bearing 10 to mesh with the inner teeth 24 of the rigid outer bearing 20 (as shown in FIG. 5 The number of teeth of the external teeth 14 of the flexible inner bearing 10 is smaller than the number of teeth of the inner teeth 24 of the rigid outer bearing 20, thereby achieving the function of the reduction transmission.

Referring to FIG. 2 to FIG. 4, the outer ring 21 of the rigid outer bearing 20 and the radial flange 16 of the flexible inner bearing 10 are respectively provided with through holes 211 and 161 capable of piercing a fixing member (screw or the like). Fixed to each other. The rollers 13 of the flexible inner bearing 10 are spherical balls, and may be implemented as rollers or needles arranged in parallel. The roller 23 of the rigid outer bearing 20 is preferably embodied as a roller, and the axial centers of the rollers 23 (rollers) are arranged at a vertical angle, so that the outer ring 21 and the inner ring of the rigid outer bearing 20 are arranged. 22 will not detach axially.

The flexible inner bearing 10 is used as a power input element, and the rigid outer bearing 20 serves as a power output element after deceleration. When it is used, as shown in FIG. 4 and FIG. 5, the power input shaft drives the harmonic cam (not shown) to rotate, and the structure of the slit 17 and the elastic deformation portion 18 of the flexible inner bearing 10 allows the flexible inner portion. The bearing 10 is more easily distracted by the harmonic cam, thereby causing its outer teeth 14 to fully engage the inner teeth 24 of the rigid outer bearing 20. Moreover, the number of teeth of the external teeth 14 of the flexible inner bearing 10 is smaller than the number of teeth of the inner teeth 24 of the rigid outer bearing 20, so that the rigid outer bearing 20 can be decelerated to output power, and the effect of high reduction ratio and direct transmission can be achieved. Moreover, the overall structure of the creation is more streamlined, which is more conducive to the convenience of manufacturing and assembly.

In summary, the rotary actuator of this creation has been practical and creative, and its technical means are also novel and undoubted, and the effect and design purpose are in line with the fact that it has been reasonably improved. To this end, a new type of patent application is filed in accordance with the law, but the bureau is requested to give a detailed examination and grant the patent as a prayer.

10‧‧‧Flexible inner bearing

11‧‧‧Outer Ring

12‧‧‧ Inner Ring

13‧‧‧Roller

14‧‧‧ external teeth

15‧‧‧ axial extension ring

16‧‧‧radial flange

161‧‧‧Perforation

17‧‧‧ slotting

171‧‧‧ strip grooving

172‧‧‧ hole

18‧‧‧Elastic deformation

20‧‧‧Rigid outer bearing

21‧‧‧ outer ring

211‧‧‧Perforation

22‧‧‧ Inner Ring

23‧‧‧Roller

24‧‧‧ internal teeth

Fig. 1 is a perspective view showing the combined structure of the reduced speed transmission bearing of the present invention. Fig. 2 is a perspective view showing the exploded structure of the reduced speed transmission bearing of the present invention. Fig. 3 is a perspective view showing another exploded structure of the reduced speed transmission bearing of the present invention. Fig. 4 is a schematic cross-sectional view showing the combined structure of the reduced speed transmission bearing of the present invention. Fig. 5 is a front view showing the combined structure of the reduced speed transmission bearing of the present invention.

Claims (6)

A reduction transmission bearing includes: a flexible inner bearing and a rigid outer bearing rotatably axially coupled to each other, the flexible inner bearing and the rigid outer bearing respectively have an outer ring, an inner ring, and a plurality of rollers disposed between each of the outer ring and the inner ring; the outer ring of the outer ring of the flexible inner bearing has a ring of external teeth, and one end of the outer ring of the flexible inner bearing has an axially extending ring And a radial flange extending from the axially extending end of the axially extending ring, the axially extending ring is provided with a plurality of slots, each of the slots forming a connection between the flexible inner bearing and the radial flange An elastic deformation portion; the inner ring of the inner ring of the rigid outer bearing has a ring inner tooth that meshes with the outer tooth of the flexible inner bearing; and a harmonic is embedded in the inner ring of the flexible inner bearing The cam, the harmonic cam rotation causes the flexible inner bearing and the rigid outer bearing to produce a decelerating transmission effect with each other. The reduction drive bearing of claim 1, wherein the number of teeth of the outer teeth of the flexible inner bearing is smaller than the number of teeth of the inner teeth of the rigid outer bearing. The reduction transmission bearing of claim 1, wherein the slit is a strip-shaped slit extending along a circumferential direction of the axially extending ring, and the two ends of the strip-shaped slit respectively form a hole. The reduction transmission bearing of claim 1, wherein the outer ring of the rigid outer bearing and the radial flange are respectively provided with perforations capable of piercing the fixing member. A reduction transmission bearing according to claim 1, wherein the roller of the flexible inner bearing is a ball. The reduction transmission bearing of claim 1, wherein the roller of the rigid outer bearing is a roller, and the outer roller cores are arranged at a vertical angle.