Split type flexible gear of harmonic reducer

Abstract

A split type flexible gear of a harmonic reducer comprises a flexible gear tooth-shaped piece and an end cover, the flexible gear tooth-shaped piece is in a straight cylinder shape and is made of metal alloy materials, the end cover is made of elastic materials, and the flexible gear tooth-shaped piece and the end cover are machined together. The flexible gear tooth-shaped piece and the end cover which are separated are combined together, machining is easy, and the problems that a flexible gear is complex in machining and high in manufacturing cost are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of harmonic reducer transmission, and particularly relates to a split flexible gear. Background Art

[0002] As a component for transmitting torque, the flexible gear of a harmonic reducer has a thin wall and is prone to fatigue fracture, while a thick wall is not easily deformed. Therefore, there are high requirements for the strength and toughness of metal materials and the processing technology.

[0003] The existing flexible gears of harmonic reducers are manufactured by the method of integral forming of metal materials, such as using processes like forging and turning. Their production is complex, the cost is high, and the processing difficulty is great.

[0004] When the existing flexible gear of a harmonic reducer is instantaneously subjected to an impact load, stress concentration occurs at the thin-walled part and it is easily damaged.

[0005] In summary, the existing flexible gears of harmonic reducers need to be improved to meet the usage requirements. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a split flexible gear for a harmonic reducer to solve the problem of difficult processing of the flexible gear.

[0007] The technical solution adopted by the present invention to solve the above technical problem is as follows:[[]] A split flexible gear for a harmonic reducer includes a flexible gear tooth-shaped part and an end cover. The flexible gear tooth-shaped part is a straight cylinder type and is made of a metal alloy material, and the end cover is made of an elastic material. The flexible gear tooth-shaped part and the end cover are processed together.

[0008] More specifically, the material of the end cover is nylon or ABS.

[0009] Preferably, the extended part of the flexible gear tooth-shaped part and the end cover material are formed in an injection mold.

[0010] Preferably, the thin-walled end of the flexible gear tooth-shaped part is provided with a fixing hole.

[0011] Preferably, reinforcing fibers are incorporated into the end cover material, which can effectively improve the strength of the material.

[0012] Preferably, the end cover is provided with an arc-shaped groove.

[0013] Preferably, a stress relief groove is opened at the corner of the end cover.

[0014] Compared with the prior art, the advantages of the present invention are as follows: The present invention combines the separate flexible gear tooth-shaped part and the end cover together. Its processing is simple, and it solves the problems of complex processing and high production cost of the flexible gear.

[0015] Also, since the flexible gear-shaped part is made of metal material and the end cover is made of nylon or ABS, the two can be made by means of molding, etc., and can be made more conveniently and quickly without additional machining.

[0016] The melting of the extension part of the gear-shaped part of the present invention and the end cover enables the gear-shaped part to be reused. Brief Description of the Drawings

[0017] Figure 1 It is a schematic structural view of the split flexible gear of the cup-shaped harmonic reducer in Embodiment 1 of the present invention.

[0018] Figure 2 It is another schematic structural view of the split flexible gear of the cup-shaped harmonic reducer in Embodiment 1 of the present invention.

[0019] Figure 3 It is a three-dimensional schematic view of the split flexible gear of the cup-shaped harmonic reducer in Embodiment 1 of the present invention.

[0020] Figure 4 It is a schematic structural view of the split flexible gear of the top hat-shaped harmonic reducer in Embodiment 2 of the present invention.

[0021] Figure 5 It is another schematic structural view of the split flexible gear of the top hat-shaped harmonic reducer in Embodiment 2 of the present invention. Detailed Description of the Invention

[0022] The present invention will be further described below in conjunction with the drawings and embodiments. Embodiment 1

[0023] As Figure 1 shown, a split flexible gear of a cup-shaped harmonic reducer includes a flexible gear-shaped part 1 and an end cover 2, and the flexible gear-shaped part 1 and the end cover 2 are processed together. The material is metal alloy. The flexible gear-shaped part 1 is in a straight cylinder shape, with flexible harmonic teeth on one side and a thin wall of the flexible gear on the other side. This thin wall needs to bear the deformation during the operation of the harmonic reducer; the thin wall of the flexible gear-shaped part 1 is embedded in the end cover, and fixing holes are opened at the thin wall end of the flexible gear. The forms of the holes are diverse, such as circular, semi-circular, square, triangular, etc. Its connection with the end cover can provide better torque output and is not easy to fall off. The extension part of the flexible gear-shaped part 1 and the material of the end cover 2 are formed in an injection mold by using manufacturing processes such as a forming mold, and the two are combined together.

[0024] The material of the end cover 2 is generally nylon or ABS, and its characteristics are high strength, outstanding fatigue resistance, and easy molding, and it is suitable for molding processes such as injection molding and extrusion.

[0025] If the end cover 2 uses nylon, post-treatment is required, including heat treatment method and moisture conditioning method, to prevent and eliminate the residual stress in the product or the dimensional change caused by the moisture absorption effect.

[0026] The end cap 2 is provided with an arc-shaped groove 21, which can reduce the thickness and enable the flexspline to deform better, thereby improving the service life of the part.

[0027] As Figure 2 shown, the outer peripheral surface of the cylinder of the flexspline tooth profile part 11 adopts harmonic teeth with uniform sizes. The harmonic teeth are embedded in another type of end cap 22. It is not easy to fall off and crack from the end cap. The deformed part of the thin wall of the flexspline is at the end cap 22, which provides torque transmission. The flexspline tooth profile part 11 and the end cap 22 are combined together using a forming die.

[0028] The end cap is another type of end cap 22, and the arc-shaped groove 21 is not provided.

[0029] As Figure 3 shown, a stress relief groove 221 is opened at the corner of the end cap 22, which can reduce stress concentration and improve the fatigue life during the operation of the harmonic reducer.

[0030] Reinforcing fibers are incorporated into the end cap material, which can effectively improve the strength of the material. Embodiment 2

[0031] As Figure 4 、 5 shown, two split flexspline of top hat type harmonic reducers are disclosed. Compared with the split flexspline of the harmonic reducer in Embodiment 1, the difference lies only in the shape of the end cap. In this embodiment, a top hat type end cap is adopted, and other technical features are the same as those in Embodiment 1 and will not be repeated here.

[0032] As Figure 4 shown, the split flexspline of the top hat type harmonic reducer includes a flexspline tooth profile part 1 and a top hat type end cap 23, and the top hat type end cap 23 is provided with an arc-shaped groove 231.

[0033] As Figure 5 shown, the split flexspline of the top hat type harmonic reducer includes a flexspline tooth profile part 11 and a top hat type end cap 24 of another shape.

Claims

1. A split-type flexible wheel of a harmonic reducer, characterized in that: The utility model comprises a flexible wheel toothed part and an end cover. The flexible wheel toothed part is a straight cylinder type and is made of a metal alloy material. The end cover is made of an elastic material. The flexible wheel toothed part and the end cover are processed together.

2. The split-type flexible wheel of the harmonic reducer according to claim 1 is characterized in that: The end cap material is nylon or ABS.

3. The split-type flexible wheel of the harmonic reducer according to claim 1 or 2, characterized in that: The extended portion of the flex spline toothed part and the end cover material are formed in an injection mold.

4. The split flexible wheel of the harmonic reducer according to claim 1 or 2, characterized in that: A fixing hole is provided at the thin-wall end of the flexible wheel toothed part.

5. The split flexible wheel of the harmonic reducer according to claim 1 or 2, characterized in that: The end cap material is mixed with reinforcing fibers.

6. The split flexible wheel of the harmonic reducer according to claim 1 or 2, characterized in that: The end cover is provided with an arc-shaped groove.

7. The split-type flexible wheel of the harmonic reducer according to claim 1 or 2, characterized in that: A stress release groove is provided at the corner of the end cover.

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