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. According to the flexible gear, 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] This utility model belongs to the field of harmonic reducer transmission technology, and particularly relates to a split flexible wheel. Background Technology

[0002] As a component that transmits torque, the flexible wheel of a harmonic reducer is prone to fatigue fracture when the wall is thin, and not easily deformed when the wall is thick. Therefore, it has high requirements for the strength and toughness of the metal material and the processing technology.

[0003] Existing harmonic reducer flexures are manufactured using a one-piece metal forming method, such as forging or turning, which is complex, costly, and difficult to process.

[0004] When the flexible wheel of an existing harmonic reducer is subjected to an instantaneous impact load, the stress concentrates at the thin wall, making it susceptible to damage.

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

[0006] The technical problem to be solved by this utility model is to overcome the above-mentioned defects of the prior art and provide a split flexible wheel for a harmonic reducer, so as to solve the problem that the flexible wheel is not easy to process.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0008] A split-type flex wheel for a harmonic reducer includes a flex wheel tooth profile and an end cap. The flex wheel tooth profile is cylindrical and made of metal alloy material, while the end cap is made of elastic material. The flex wheel tooth profile and the end cap are machined together.

[0009] More specifically, the end cap material is nylon or ABS.

[0010] Even better, the extension portion of the flexible gear tooth and the end cap material are formed in an injection mold.

[0011] Even better, the thin-walled end of the flexible gear tooth is provided with a fixing hole.

[0012] Even better, incorporating reinforcing fibers into the end cap material can effectively improve the strength of the material.

[0013] Even better, the end cap is provided with an arc-shaped groove.

[0014] Even better, a stress relief groove is provided at the corner of the end cap.

[0015] Compared with the prior art, the advantages of this utility model are: this utility model adopts separate flexible gear toothed parts and end caps combined together, which is simple to process and solves the problems of complex processing and high manufacturing cost of flexible gears.

[0016] Furthermore, since the flexible gear teeth are made of metal and the end caps are made of nylon or ABS, they can be manufactured more conveniently and quickly without additional machining, through molding and other methods.

[0017] The fusion of the extended portion of the toothed part and the end cap in this invention allows the toothed part to be reused. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the split flexible wheel structure of the cup-shaped harmonic reducer in Embodiment 1 of this utility model.

[0019] Figure 2 This is another structural schematic diagram of the split flexible wheel of the cup-shaped harmonic reducer in Embodiment 1 of this utility model.

[0020] Figure 3 A three-dimensional schematic diagram of the cup-shaped harmonic reducer split flexible wheel of Embodiment 1 of this utility model.

[0021] Figure 4 This utility model's embodiment 2 is a schematic diagram of the split flexible wheel structure of the hat-shaped harmonic reducer.

[0022] Figure 5 Another structural diagram of the split flexible wheel of the hat-shaped harmonic reducer in Embodiment 2 of this utility model. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0024] like Figure 1 As shown, a cup-shaped harmonic reducer with a split flexure includes a flexure gear tooth 1 and an end cap 2, which are machined together. The material is a metal alloy.

[0025] The flexible gear tooth 1 is cylindrical, with a flexible harmonic tooth on one side and a flexible thin wall on the other. This thin wall needs to withstand the deformation of the harmonic reducer during operation. The thin wall of the flexible gear tooth 1 is embedded in the end cap, and the end of the flexible thin wall has a fixing hole. The hole can be of various shapes, such as round, semi-circular, square, or triangular. It is connected to the end cap, which can provide better torque output and is not easy to fall off. The extension of the flexible gear tooth 1 and the end cap 2 are formed in the injection mold using molding and other manufacturing processes, so that the two are combined together.

[0026] The end cap 2 is generally made of nylon or ABS, which is characterized by high strength, outstanding fatigue resistance, and easy molding, and is suitable for injection molding, extrusion and other molding processes.

[0027] If the end cap 2 is made of nylon, it requires post-treatment, such as heat treatment or moisture conditioning, to prevent and eliminate residual stress in the product or dimensional changes caused by moisture absorption.

[0028] The end cap 2 is provided with an arc-shaped groove 21, which can reduce the thickness and allow the flexible wheel to deform better, thereby improving the service life of the parts.

[0029] like Figure 2 As shown, the cylindrical outer circumference of the flexible gear tooth 11 is made of uniformly sized harmonic teeth, which are embedded in another type of end cap 22. It is not easy for the end cap to fall off or crack. The thin-walled deformation part of the flexible gear is in the end cap 22, which provides torque transmission. The flexible gear tooth 11 and the end cap 22 are joined together using a molding die.

[0030] The end cap is another type of end cap 22, without the arc-shaped groove 21.

[0031] like Figure 3 As shown, a stress relief groove 221 is provided at the corner of the end cover 22, which can reduce stress concentration and improve fatigue life during the operation of the harmonic reducer.

[0032] The addition of reinforcing fibers to the end cap material can effectively improve the strength of the material. Example 2

[0033] like Figure 4 , 5 As shown, two types of split flexible wheels for harmonic reducers with top hats are disclosed. The only difference between them and the split flexible wheels for harmonic reducers in Embodiment 1 is the shape of the end cap. This embodiment uses a top hat-shaped end cap. Other technical features are the same as in Embodiment 1 and will not be repeated here.

[0034] like Figure 4 As shown, the split flexible wheel of the top hat type harmonic reducer includes a flexible wheel toothed part 1 and a top hat type end cap 23, wherein the top hat type end cap 23 is provided with an arc-shaped groove 231.

[0035] like Figure 5 As shown, the split flexible wheel of the top hat type harmonic reducer includes a flexible wheel tooth 11 and a top hat type end cap 24 of another shape.

Claims

1. A split flexspline for a harmonic reducer, characterized by: The invention relates to a flexible gear wheel and a cover, wherein the flexible gear wheel is a straight cylinder and made of metal alloy, and the cover is made of elastic material, and the flexible gear wheel and the cover are processed together.

2. The split flexspline of a harmonic reducer of claim 1, wherein: The cover is made of nylon or ABS.

3. The split flexspline of a harmonic reducer of claim 1 or 2, characterized in that: The extension of the flexible gear wheel and the cover material are formed in an injection mold.

4. The split flexspline of a harmonic reducer of claim 1 or 2, wherein: The thin wall end of the flexible gear wheel is provided with a fixing hole.

5. The split flexspline of a harmonic reducer of claim 1 or 2, wherein: The cover material is mixed with reinforcing fibers.

6. The split flexspline of a harmonic reducer of claim 1 or 2, wherein: The cover is provided with an arc-shaped groove.

7. The split flexspline of a harmonic reducer of claim 1 or 2, wherein: The corner of the cover is provided with a stress release groove.

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