Gear component, gear mechanism and production method of gear component
A manufacturing method and technology of gear parts, applied to components with teeth, belts/chains/gears, mechanical equipment, etc., can solve the problems of reduced inner diameter, inability to connect firmly, and inability to eliminate smooth rotation of gear parts, etc., To achieve the effect of reducing manufacturing costs
Inactive Publication Date: 2009-02-11
NIDEC SANKYO CORP
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Problems solved by technology
[0006] However, the gear component described in Patent Document 1 has a problem that it takes a lot of time to form the internal teeth in the connecting hole of the large-diameter gear.
In addition, in the structure in which the grooves formed on the outer peripheral surface of the coupling portion of the small-diameter gear fit with the internal teeth of the large-diameter gear, there was a problem that the connection could not be securely coupled in the axial direction due to machining accuracy.
[0007] In addition, in the structure where the grooves formed on the outer peripheral surface of the connecting portion of the small-diameter gear are fitted with the internal teeth of the large-diameter gear, if the press-fit allowance increases due to machining accuracy, the inner diameter of the small-diameter gear will decrease. Small, so that the problem that the gear part does not rotate smoothly in the state where the support shaft is passed through the gear part cannot be solved
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[0037] Hereinafter, a gear component to which the present invention is applied, a gear mechanism including the gear component, and a method of manufacturing the gear component will be described with reference to the drawings.
[0038] (The overall structure of the gear mechanism)
[0039] figure 1 (a), figure 1 (b) are respectively a plan view and a structural view of the gear mechanism to which the present invention is applied. Such as figure 1 (a), figure 1 As shown in (b), the gear mechanism 100 of this embodiment constitutes a reduction mechanism for reducing and transmitting the rotation of the prime mover shaft 51 to the output shaft 56 between the pair of end plates 101 and 102 . exist figure 1 (a), figure 1 In (b), the example in which the drive shaft 51 and the output shaft 56 are coaxially arrange|positioned, and four support shafts 52-55 are arrange|positioned around the output shaft 56 is illustrated. Although in figure 1 The situation represented in (b) is...
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The invention provides a gear component with high torque intensity and invariable size of internal diameter even when connecting two components by pressing, a gear mechanism having the gear component and a manufacturing method of the gear component, characterized in that the gear component (1) has a structure of pressing a connection part (11c) of a small-diameter gear (11) into a connection hole (12b) of a large-diameter gear (12); inner peripheral surface of the connection hole (12b) is a flat surface, but slots (11b) are formed on outer peripheral surface of the connection part (11c), thus, inner peripheral surface of the connection hole (12b) may generate a plastic deformation so as to be introduced between the slots (11b) when the connection part (11c) of the small-diameter gear (11) is pressed into the connection hole (12b) of the large-diameter gear (12), therefore, the small-diameter gear (11) and large-diameter gear (12) are connected with each other by high torque intensity. Moreover, heavy load may not be generated on the connection part (11c) when the connection part (11c) is pressed into the connection hole (12b), thus, size of inner diameter of the connection part (11c) cannot be reduced.
Description
technical field [0001] The present invention relates to a gear member configured by connecting a plurality of members, a gear mechanism including the gear member, and a method of manufacturing the gear member. Background technique [0002] In a speed reducer for reducing the rotational speed of a motor or the like, due to space constraints, for example, a structure using a stepped gear member having two coaxial gears with different diameters is known. However, it is difficult to manufacture two gears integrally by cutting a gear part of such a structure. [0003] Therefore, the following technical proposal has been proposed, that is, after the small-diameter gear and the large-diameter gear are respectively produced by cutting, the connecting part of the small-diameter gear is pressed into the connecting hole of the large-diameter gear, so that the small-diameter gear and the large-diameter gear form a One. However, when the connecting portion of the small-diameter gear is...
Claims
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Inventor 山崎宽范
Owner NIDEC SANKYO CORP