1. The utility model provides a harmonic speed reducer machine flexbile gear structure which characterized in that: a cylindrical surrounding structure is formed by a bottom cover (11) and a vertical wall (22) vertically extending from the circumferential direction of the bottom cover; deformation ribs (3) distributed circumferentially are arranged in the area, close to the vertical wall (22), of the bottom cover (11); in the enclosing range of the deformed ribs (3), a central positioning hole (4) and a fixing hole (5) at the periphery of the positioning hole are arranged on the bottom cover (11); the tooth profile (1) meshed with the steel wheel is circumferentially arranged on the outer wall of the vertical wall (22), and a circle of flexible bearing limiting step (2) is arranged on the inner wall of the vertical wall (22) and is lower than the top edge of the vertical wall.

2. The flexspline structure of a harmonic reducer according to claim 1, characterized in that: the deformed ribs (3) are uniformly distributed on the flexible gear bottom cover (11) in a spiral shape.

3. The flexspline structure of a harmonic reducer according to claim 1, characterized in that: the fixing holes (5) are uniformly spaced and circumferentially distributed on the periphery of the positioning hole (4).

4. The flexspline structure of a harmonic reducer according to claim 1, characterized in that: the outer surface of the bottom cover (11) is in a stepped boss shape, and the radial inner area provided with the positioning hole (4) and the fixing hole (5) protrudes out of the radial outer area.

5. The flexspline structure of a harmonic reducer according to claim 1, characterized in that: the inner surface of the bottom cover (11) is a plane, and the deformation ribs (3) protrude from the inner surface.

6. The flexspline structure of a harmonic reducer according to claim 1, characterized in that: the tooth profile (1) is arranged at least in the outer wall of the vertical wall (22) in a height region from the top downwards.

7. The flexspline structure of a harmonic reducer according to claim 1, characterized in that: the flexible gear is formed by injection molding of engineering plastics.

8. The flexspline structure of a harmonic reducer according to claim 1, characterized in that: the base material of the engineering plastic is at least one of nylon, POM, PAI and PEEK, and at least one of carbon fiber, glass fiber, graphite, PTFE and molybdenum disulfide is added as an auxiliary material.

9. The flexspline structure of a harmonic reducer according to claim 1, characterized in that: one of nylon, POM, PAI and PEEK is used as a base material, 5-35% of carbon fiber or glass fiber is added, 2-10% of graphite or PTFE and 5-15% of molybdenum disulfide are added at the same time.

Technical Field

The harmonic reducer has the advantages of compact structure, small volume, light weight, large bearing capacity, small back clearance, high transmission precision and the like, and is widely applied to the fields of industrial robots, aerospace and precision machine tools. The harmonic speed reducer comprises a steel wheel, a flexible wheel and a wave generator, wherein the wave generator with elliptic deformation is arranged in the flexible wheel with elasticity, and the wave generator rotates to force the flexible wheel tooth form and the steel wheel tooth form to be periodically meshed and separated, so that the effect of staggered tooth difference speed reduction is realized.

The flexible gear of the traditional harmonic speed reducer is made of metal materials, is formed by precise machining and is subjected to multiple heat treatments and surface process treatments, so that the high elasticity and strength of the flexible gear are realized, and the flexible gear has fatigue resistance and wear resistance of a tooth surface. Therefore, the harmonic flexible gear has high cost and is difficult to manufacture.

Disclosure of Invention

The invention aims to provide a flexible gear structure of a harmonic speed reducer, which has the advantages of easiness in production, low cost, light weight, high consistency, compact structure and the like.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a harmonic speed reducer machine flexbile gear structure which characterized in that: a cylindrical surrounding structure is formed by a bottom cover (11) and a vertical wall (22) vertically extending from the circumferential direction of the bottom cover; deformation ribs (3) distributed circumferentially are arranged in the area, close to the vertical wall (22), of the bottom cover (11); in the enclosing range of the deformed ribs (3), a central positioning hole (4) and a fixing hole (5) at the periphery of the positioning hole are arranged on the bottom cover (11); the outer wall of the vertical wall (22) is circumferentially provided with a tooth profile (1) meshed with the steel wheel, and the inner wall of the vertical wall, which is lower than the top edge of the vertical wall, is provided with a circle of flexible bearing limiting steps (2).

In the technical scheme, the deformed ribs (3) are uniformly distributed on the flexible gear bottom cover (11) in a spiral shape.

In the technical scheme, the fixing holes (5) are uniformly spaced and circumferentially distributed on the periphery of the positioning hole (4).

In the technical scheme, the outer surface of the bottom cover (11) is in a stepped boss shape, and the radial inner side area provided with the positioning hole (4) and the fixing hole (5) protrudes out of the radial outer side area.

In the technical scheme, the inner surface of the bottom cover (11) is a plane, and the deformation ribs (3) protrude from the inner surface.

In the technical scheme, the tooth profile (1) is at least arranged in a section of height area from the top to the bottom on the outer wall of the vertical wall (22).

In the technical scheme, the flexible gear is formed by injection molding of engineering plastics.

In the technical scheme, the base material of the engineering plastic is at least one of nylon, POM, PAI and PEEK, and at least one of carbon fiber, glass fiber, graphite, PTFE and molybdenum disulfide is added as an auxiliary material.

Therefore, the flexible gear of the harmonic speed reducer adopts a unique flexible gear structure, and realizes the functions of the traditional flexible gear: the tooth profile is meshed with the tooth profile of the steel wheel to transmit torque, the flexible bearing limiting step can prevent the flexible bearing from axially moving, the deformation ribs are in a spiral shape and evenly distributed at the bottom of the flexible wheel, radial elastic deformation of the flexible wheel can be achieved, the coaxiality of the flexible wheel and the steel wheel is guaranteed by the positioning holes, and the fixing holes can transmit torque of harmonic waves.

In addition, the flexible gear is creatively formed by injection molding of special engineering plastics, the function of the traditional flexible gear is realized, and meanwhile, a complex metal treatment process is not needed, so that the flexible gear has the advantages of easiness in production, low cost, light weight, high consistency, compact structure and the like.

Drawings

Fig. 1 is a schematic diagram of a flexspline of a harmonic reducer according to the present invention.

Fig. 2 is a front view of a flexible gear structure of the harmonic reducer of the present invention.

Fig. 3 is a top view of a flexible gear structure of the harmonic reducer of the present invention.

The reference numerals in figures 1-3 correspond to the following:

1. tooth profile; 2. a flexible bearing limit step; 3. deforming the ribs; 4. positioning holes; 5. a fixing hole; 11. a bottom cover; 12. a vertical wall.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The invention is described in further detail with reference to the accompanying figures 1-3.

As shown in the attached drawing 1, a flexible gear of the harmonic speed reducer is provided with a tooth profile 1, a flexible bearing limiting step 2, a deformation rib 3, a positioning hole 4 and a fixing hole 5; the flexible gear is a cylindrical surrounding structure consisting of a bottom cover 11 and a vertical wall 22 vertically extending from the circumferential direction of the bottom cover; the bottom cover 11 is provided with deformation ribs 3 distributed circumferentially in the area close to the vertical wall 22; in the enclosing range of the deformed ribs 3, a central positioning hole 4 and a fixing hole 5 at the periphery of the positioning hole are arranged on the bottom cover 11; the outer wall of the vertical wall 22 is circumferentially provided with a tooth profile 1 used for being meshed with a steel wheel, and the inner wall of the vertical wall, which is lower than the top edge of the vertical wall, is provided with a circle of flexible bearing limiting steps 2.

Tooth profile 1 transmits the moment of torsion with the tooth profile meshing of steel wheel, and flexible bearing's axial cluster can be prevented to flexible bearing spacing step 2, and deformation rib 3 becomes the spiral shape, and evenly distributed can realize the radial elastic deformation of flexbile gear in flexbile gear bottom, and the axiality of flexbile gear and steel wheel is guaranteed to locating hole 4, and the moment of torsion of harmonic can be transmitted to fixed orifices 5.

The outer surface of the bottom cover 11 is in a stepped boss shape, and the radial inner area provided with the positioning hole 4 and the fixing hole (5) is protruded from the radial outer area.

The inner surface of the bottom cover 11 is a plane, and the deformation ribs 3 are arranged by protruding from the inner surface.

The tooth profile 1 is arranged at least in a height area from the top to the bottom of the outer wall of the vertical wall 22, and the tooth profile 1 can also be arranged on the outer wall of the whole vertical wall 22.

The flexible gear is formed by injection molding of engineering plastics. Preferably, the flexible gear is injection molded by high-temperature-resistant and high-strength engineering plastics, the engineering plastics can be nylon, POM, PAI and PEEK, and at least one of carbon fiber, glass fiber, graphite, PTFE and molybdenum disulfide is added.

For example, one of nylon, POM, PAI and PEEK is taken as a base material, 5 to 35 weight percent of carbon fiber or glass fiber is added to increase the rigidity and the wear resistance of the part, 2 to 10 weight percent of graphite or PTFE is added to improve the self-lubricating property and the wear resistance of the flexible gear, and 5 to 15 weight percent of molybdenum disulfide is added to improve the wear resistance.

It should be noted that, according to the implementation requirement, each step/component described in the present application can be divided into more steps/components, and two or more steps/components or partial operations of the steps/components can be combined into new steps/components to achieve the purpose of the present invention.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.