Flexible gear connecting mechanism of harmonic speed reducer

Abstract

A flexible gear connecting mechanism of a harmonic speed reducer comprises a flexible gear, an output flange, a spring, a connecting shaft and a nut. Flexible gear end face teeth are arranged on a bottom flange of the flexible gear, output flange end face teeth are arranged on the output flange, and the flexible gear end face teeth on the flexible gear can be meshed with the output flange end face teeth on the output flange. A flexible gear through hole is further formed in the center of the bottom flange, a flange through hole is correspondingly formed in the center of the output flange, the connecting shaft is T-shaped and penetrates through the flexible gear through hole and the flange through hole, the head end of the connecting shaft is limited by the output flange, and the other end of the connecting shaft is in threaded connection and screwed through a nut. The method has the advantages that the precision adjusting procedure of the flexible gear in the assembling process can be greatly simplified, meanwhile, the torque protection effect is achieved, and therefore the service life of the harmonic reducer is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of harmonic reducer flexspline mechanism, specifically to a kind of harmonic reducer flexspline connecting mechanism. BACKGROUND

[0002] Harmonic reducer belongs to a kind of speed reducer, which includes three basic components: fixed inner tooth rigid wheel, flexspline and wave generator that makes flexspline radial deformation, with small volume, light weight, transmission stable, no impact, no noise, high motion precision and other advantages, therefore, has become a kind of widely used speed reducer.

[0003] The installation of the flexspline of the existing harmonic reducer needs to consider the installation precision and the ability of torque transmission, often needs to be matched with the processing of pin hole, low efficiency and inconvenient to disassemble and assemble;The flexspline of harmonic reducer is easy to fail under impact load due to the adoption of thin-walled structure, which greatly reduces the service life of harmonic reducer. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the above-mentioned deficiencies of the prior art and provide a kind of harmonic reducer flexspline connecting mechanism, which makes the installation of the flexspline of the harmonic reducer convenient and can play the role of torque protection.

[0005] The technical scheme adopted by the present application to solve the above problems is: A kind of harmonic reducer flexspline connecting mechanism, including flexspline, output flange, spring, connecting shaft, nut;The bottom flange of the flexspline has flexspline end face tooth, the output flange has output flange end face tooth, the flexspline end face tooth on the flexspline can be engaged together with the output flange end face tooth on the output flange;The center of the bottom flange is further provided with flexspline through hole, and the center of the output flange is correspondingly provided with flange through hole, the connecting shaft is T-shaped, which passes through the flexspline through hole and the flange through hole, the head end of the connecting shaft is limited by the output flange, and the other end of the connecting shaft is connected by the nut and screwed tightly.

[0006] Better, the bottom center of the output flange is provided with a groove, a through hole is arranged in the groove, and the head end of the connecting shaft is placed in the groove, so that the connecting shaft can better connect the output flange and the bottom flange of the flexspline.

[0007] More specifically, the spring is a butterfly spring or a wave spring.

[0008] Compared with the prior art, the advantages of the present application are that the flexible gear connecting mechanism of the harmonic reducer can greatly simplify the precision adjustment process of the flexible gear during assembly through the cooperation of the flexible gear end face teeth and the flexible gear end face teeth; at the same time, when the harmonic reducer is working normally, the spring presses the flexible gear and the output flange, and the torque is transmitted from the flexible gear to the output flange through the end face teeth; when the torque of the harmonic reducer exceeds the maximum allowable torque, the flexible gear compresses the spring under the action of the meshing surface of the end face teeth, until the meshing surface of the flexible gear and the output flange is disengaged and slips, which can play a torque protection role, thereby improving the service life of the harmonic reducer. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a front view of a flexible gear connecting mechanism of a harmonic reducer according to an embodiment of the present application.

[0010] Figure 2 is Figure 1 A-A sectional view of the flexible gear connecting mechanism of the harmonic reducer.

[0011] Figure 3 is a flexible gear end face view of a flexible gear connecting mechanism of a harmonic reducer according to an embodiment of the present application.

[0012] Figure 4 is an output flange end face view of a flexible gear connecting mechanism of a harmonic reducer according to an embodiment of the present application. DETAILED DESCRIPTION

[0013] The present application will be further described below in conjunction with the drawings and embodiments.

[0014] As Figures 1-4 shown, a flexible gear connecting mechanism of a harmonic reducer includes a flexible gear 1, an output flange 2, a butterfly spring 3, a connecting shaft 4, and a nut 5.

[0015] The bottom flange 11 of the flexible gear 1 has flexible gear end face teeth 111, and the output flange 2 has output flange end face teeth 21, and the flexible gear end face teeth 111 on the flexible gear can mesh together with the output flange end face teeth 21 on the output flange.

[0016] The center of the bottom flange 11 is further provided with a flexible gear through hole 112, and the center of the output flange 2 is correspondingly provided with a flange through hole 21, the connecting shaft 4 is T-shaped, passes through the flexible gear through hole 112 and the flange through hole 21, the head end 41 of the connecting shaft 4 is limited by the output flange 2, and the other end 42 of the connecting shaft 4 is threadedly connected and tightened by the nut 5.

[0017] The bottom center of the output flange 2 is provided with a groove 22, the groove 22 is provided with a through hole 23, and the head end 41 of the connecting shaft 4 is placed in the groove 22, so that the connecting shaft 4 can better connect the output flange 2 and the bottom flange 11 of the flexible gear 1.

[0018] The butterfly spring 3 is sleeved on the connecting shaft 4, one end of the butterfly spring 3 is limited by the bottom flange 11 of the flexspline 1, and the other end is tightened by the nut 5, so that the output flange 2 and the bottom of the flexspline 1 are adjustably pressed by the butterfly spring and the nut.

[0019] When the harmonic reducer works normally, the butterfly spring 3 presses the bottom flange 11 of the flexspline and the output flange 2, the torque is transmitted from the flexspline to the output flange through the face gear, and the flexspline can work normally; when the torque exceeds the maximum allowable torque, the flexspline compresses the butterfly spring under the action of the meshing surface of the face gear, until the meshing surfaces of the flexspline and the output flange are disengaged and slip, thereby playing a torque protection role.

[0020] The torque protection range of different sizes can also be realized by adjusting the pressing degree of the nut 5 relative to the butterfly spring 3.

Claims

1. A flexural gear connection mechanism for a harmonic reducer, characterized in that: The assembly includes a flexible wheel, an output flange, a spring, a connecting shaft, and a nut. The bottom flange of the flexible wheel has flexible wheel end face teeth, and the output flange has output flange end face teeth. The flexible wheel end face teeth on the flexible wheel and the output flange end face teeth on the output flange can mesh together. The bottom flange also has a flexible wheel through hole at its center, and the output flange has a corresponding flange through hole at its center. The connecting shaft is T-shaped and passes through the flexible wheel through hole and the flange through hole. The head end of the connecting shaft is limited by the output flange, and the other end of the connecting shaft is threadedly connected to and tightened by a nut.

2. The harmonic reducer flexural gear connection mechanism according to claim 1, characterized in that: The bottom center of the output flange is provided with a groove, and a through hole is provided in the groove. The end of the connecting shaft is placed in the groove.

3. The harmonic reducer flexural gear connection mechanism according to claim 1 or 2, characterized in that: The spring is a disc spring or a wave spring.

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