High-precision gear drive pair

A gear transmission, high-precision technology, used in belts/chains/gears, components with teeth, portable lifting devices, etc., can solve the problem of gear transmission backlash, complex structure and assembly, and troublesome precision machining, etc. problems, to achieve the effect of simple structure, reducing vibration and noise, and prolonging service life

CN102734430AInactive Publication Date: 2012-10-17TIANJIN QIXING PRECISION MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2012-10-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a high-precision gear drive pair, and is characterized in that a gear adopts gradient tangential deflection, tangential deflection coefficients are changed along an axis direction of a toothed disc from small to large according to a certain rule, so that a certain inclined angle is formed between two teeth surfaces of gear teeth, and an engagement backlash is adjusted through regulating an axial relative position of the mutually engaged gears; a screw thread or cam transmission is adopted, and the axial force generated in the transmission process is utilized, so that two gears are moved timely relatively, the gear backlash and the return difference can be eliminated or reduced, the vibration and the noise are reduced, and the service life is prolonged; in comparison with the other backlash regulating manner in the prior art, the backlash is directly eliminated by utilizing the driving force, and the high-precision gear drive pair has the advantages of simple structure, small volume and the like; by utilizing the radial deflection form, the influence of the tangential deflation on the tooth thickness can be compensated, the intensity of the wheel tooth of the gear is ensured, the contact ratio of engagement is increased, the bearing capacity is high, and the high-precision gear drive pair is suitable for high-speed input in precise transmission.
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Description

technical field

[0001] The invention relates to a transmission device, in particular to a transmission device with high precision requirements. Background technique

[0002] Gear transmission is used to transmit motion and power between two shafts. Compared with other mechanical transmissions, gears have the advantages of compact structure, stable operation, and low noise, so they are widely used in various machines and instruments.

[0003] With the development of production technology and the demand for high-quality products, especially the development of precision heavy-duty transmission, higher requirements are put forward for the control of transmission accuracy and backlash.

[0004] Existing technology In precision gear transmission, in order to achieve anti-backlash transmission or adjust meshing backlash, commonly used technical solutions include: eccentric bushing adjustment center distance method, double-piece thin gear staggered tooth adjustment method, spring fo...

Examples

Embodiment Construction

[0017] figure 1 It is the gear tooth shape structure diagram of the present invention, figure 2 It is a schematic diagram of the gear meshing structure (thread transmission) of the present invention, image 3 It is a schematic diagram of the gear meshing structure of the present invention (the second structure of screw transmission). As shown in the figure, the high-precision gear transmission pair of the present invention includes a driving gear 1 and a driven gear 2 meshing with it. The driving gear 2 adopts the form of tangential displacement, and the tangential displacement coefficient changes from small to large along the axial direction to form a gear with variable tooth thickness. The teeth of the driving gear 1 and the teeth of the driven gear 2 The direction of the tangential deformation coefficient of the tooth surface is the same from small to large. As shown in the figure, the tooth thickness of the gear teeth gradually becomes thinner along the axial direction; ...