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A technology of cycloidal gear and cycloidal wheel, which is applied to gear teeth, components with teeth, belts/chains/gears, etc. It can solve the problems of designing the modification curve and achieving the optimal modification target, etc., and achieves strong practicability Effect
Inactive Publication Date: 2015-09-16
盐城国卓科技有限公司
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However, the above combined modification methods cannot optimize the modification targ
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Embodiment 1
[0053] For modifications aimed at minimizing elastic deformation at the meshing points:
[0054] In formula (1), take Δl=0, θ 1 =10,θ 2 = 150, t = 0.02, The gap curve when figure 1 As shown, the incremental value of the arc radius of the modified grinding wheel can be calculated according to formula (6). At each meshing point, the incremental value of the arc radius of the grinding wheel is different, which is a curve similar to the clearance curve. Substituting the incremental value of the arc radius of the modified grinding wheel into the cycloid tooth profile equation, as shown in formula (7), the modified cycloid tooth profile can be obtained; Write the trimming program of the shaped grinding wheel on the machine, trim the shaped grinding wheel, and then grind and process the teeth of the cycloidal wheel.
[0055]
[0056] In formula (7), r p is the radius of the center circle of the pin tooth; r rp is the pin tooth (roller) radius; Δr rpi Incremental value of t...
Embodiment 2
[0060] For the modification aiming at the minimum transfer error:
[0061] In formula (3), take θ 1 =10,θ 3 =20,θ 4 =145,θ 2 =155, T=1000NM, The gap curve when figure 2 shown, where:
[0062]
[0063] r c 'is the radius of the pitch circle of the cycloid wheel.
Embodiment 3
[0065] For modifications aimed at minimizing contact stress:
[0066] In formula (5), take a=1.04, b=0.75, θ 1 =15, θ 2 =150, t=0.02, k=0.4, n=4, The gap curve when image 3 shown.
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Abstract
The invention discloses a method for shaping cycloidal gear tooth profile, which comprises the following steps: 1 a shaping target of a cycloidal gear tooth profile is obtained, a gap curve is obtained according to the shaping target of the cycloidal gear tooth profile, and the shaping target of the is cycloidal gear tooth profile is a shaping which uses the minimum elastic deformation in an engaged point as a target, a shaping which transmits the minimum error as a target and a shaping which uses the minimum contact stress as a target or uses the minimum contact force as a target; and 2 a shaping pin-teeth radius delta value delta residential rental price index (Delta rrpi) is obtained according to the gap curve, a cycloidal gear tooth profile shape after being shaped is obtained according to the shaping pin-teeth radius delta value Delta rrpi, the profile of grinding wheels is obtained according to the cycloidal gear tooth profile shape after being shaped, and a cycloidal gear is processed on a computer numerical control gear profile grinder according to the profile of the grinding wheel. The method for shaping the cycloidal gear tooth profile can shape the cycloidal gear tooth profile according the shaping target, and enables the shaping target to be the best.
Description
technical field [0001] The invention belongs to the field of gear manufacturing and relates to a method for modifying the tooth profile of a cycloidal gear. Background technique [0002] The application of cycloid tooth profile is even earlier than that of involute tooth profile. Cycloid tooth profile transmission appeared in the early clocks and watches, but it can only be used in the field of light load and measurement indexing. It was not until the 1930s that the German Rowlands Platz first proved that when the arc and cycloid tooth profiles are used as conjugate curves for transmission, the constant transmission ratio conditions stipulated by the basic theorem of tooth profile meshing are fully satisfied, which is the cycloid tooth profile. Pin wheel planetary transmission (hereinafter referred to as needle pendulum transmission). Later, after the Japanese purchased the German patent in the late 1950s, they effectively solved the problems existing in the pendulum drive ...
Claims
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