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Rigid gear and flexible gear which are used for short-tube flexible-gear harmonic speed reducer and machining process thereof

A harmonic reducer, processing technology, applied in the direction of gear transmission, components with teeth, belt/chain/gear, etc., can solve the problem of reduced transmission stiffness, reduced coincidence, flexible gear teeth and rigid gear The reduction of the area of ​​the tooth meshing area can achieve the effect of improving the transmission rigidity, reducing the maximum stress and simplifying the processing.

Active Publication Date: 2015-04-15
DONGGUAN RICHTEK ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a rigid spline and a flexspline for a short-tube flexible spline harmonic reducer and its processing technology to solve the problem of the flexspline caused by the reduction of the axial size of the short-tube flexible spline harmonic reducer. The deflection of the teeth reduces the meshing area of ​​the flexible spline and the rigid spline, resulting in a decrease in the coincidence degree and a decrease in transmission stiffness.

Method used

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  • Rigid gear and flexible gear which are used for short-tube flexible-gear harmonic speed reducer and machining process thereof
  • Rigid gear and flexible gear which are used for short-tube flexible-gear harmonic speed reducer and machining process thereof
  • Rigid gear and flexible gear which are used for short-tube flexible-gear harmonic speed reducer and machining process thereof

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specific Embodiment approach 1

[0036] Specific implementation mode one: as Figure 10 and Figure 11 As shown, the internal teeth of the rigid wheels 6 and 9 of the short-tube flexspline harmonic reducer described in this embodiment are gear teeth with an inclination angle α, and the inclination direction of the inclination angle α is different from the opening angle of the flexspline at the long axis Direction θ 2 Consistent, the inclination angle α is 0.1°~2°.

specific Embodiment approach 2

[0037] Specific implementation mode 2: The calculation formula of the inner tooth inclination angle α of the rigid wheel of the short-tube flexible spline harmonic reducer described in this embodiment is: α = Σ j = 1 n c j ( b j 1 α j 1 + b j 2 α j 2 ) ;

[0038] where n is the number of meshing teeth in the meshing area near the major axis, c i is the weighting coefficient of the jth tooth, b j1 , b j2 is a weighting factor determined by the position of the pole radi...

specific Embodiment approach 3

[0039] Specific implementation mode three: as Figure 4 , 6 , 11 and Figure 12 As shown, the flexspline of the short-tube flexspline harmonic reducer described in this embodiment, the external tooth profile of the flexspline 5 and 8 consists of two tooth profile curve segments and a tooth top straight segment l d Composition, the tops of the two tooth profile curves pass through the tooth top straight line l d connected together, each tooth profile curve segment is defined by the upper arc radius ρ a and the lower arc radius ρ f Connected with smooth transitions.

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Abstract

Provided are a rigid gear and flexible gear which are used for short-tube flexible-gear harmonic speed reducer and a machining process thereof. Inner teeth of the rigid gear are gear teeth with an inclination angle alpha, the inclination direction of the inclination angle alpha is consistent with the field angle theta2 at the position of a long shaft of the flexible gear, and the inclination angle alpha is 0.1 degree to 2 degrees. Top ends of two tooth profile curve line sections of the outer tooth profile of the flexible gear are connected through a tooth top straight line section. Each tooth profile curve line section is formed by connecting upper circular radius and lower circular radius in smooth transition mode. The harmonic speed reducer comprises the rigid gear, the flexible gear and a wave generator. The ratio of the length and the inner diameter of the flexible gear is smaller than 1. The flexible gear and the rigid gear in the short-tube flexible-wheel harmonic speed reducer are both machined through a slow-feeding wire cutting off machine. The gear teeth of the flexible gear and the gear teeth of the rigid gear are meshed in the certain inclination angle. The total contact area of the meshing teeth pair is increased by 15% compared with the condition where no inclination angle exists. Overlapping ratio of the harmonic gears is improved, and harmonic transmission rigidity is improved.

Description

technical field [0001] The invention relates to a rigid spline and a flexible spline of a short tube flexible spline harmonic reducer and a processing technology thereof. Background technique [0002] Harmonic gear transmission is a reducer that relies on the elastic deformation of flexible gears to achieve force and motion transmission. The cylindrical harmonic reducer is composed of three components: a wave generator, a rigid wheel and a flexible wheel. Usually, the rigid spline is fixed, and the wave generator is an elliptical component, which is installed inside the flexspline, forcing the flexspline to deform radially at the end of the long axis into an ellipse according to certain rules. When the wave generator rotates under the drive of the prime mover, the flexible spline is continuously deformed, and the teeth of the flexible spline gradually enter the space between the teeth of the rigid spline during the deformation process, mesh with the teeth of the rigid splin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/17F16H55/08F16H1/28B23H9/00B23H7/02
Inventor 吴伟国于鹏飞
Owner DONGGUAN RICHTEK ELECTRONICS CO LTD
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