JB/T 10419-2005 PDF English
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| JB/T 10419-2005 | English | 225 |
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Accuracy of cycloidal gear and pin wheel for cycloidal drives
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JB/T 10419-2005: Accuracy of cycloidal gear and pin wheel for cycloidal drives---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JBT10419-2005
JB
MACHINERY INDUSTRY STANDARD
ICS 21.200
J 17
File No.. 15640-2005
Accuracy of cycloidal gear and pin wheel for cycloidal drives
Issued on: MARCH 19, 2005
Implemented on: SEPTEMBER 01, 2005
Issued by. National Development and Reform Commission of the People's
Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Accuracy levels, tolerances and limit deviations... 8
5 Inspection items... 15
Annex A (informative) Gear blank tolerance... 16
Table 1 -- Limit deviation of single pitch deviation of cycloidal gears ±fpt... 9
Table 2 -- Tolerance of cumulative total deviation of cycloidal gear pitch Fp... 10
Table 3 -- Cycloidal gear tooth profile deviation tolerance Fα and cycloidal gear -- tooth
section comprehensive deviation tolerance fn... 10
Table 4 -- Cycloidal gear ring radial circular runout tolerance Fr and pinion radial
circular runout tolerance Fr'... 11
Table 5 -- Tolerance of the combined deviation of the cross section of the cycloidal gear
Fn... 12
Table 6 -- Cycloidal gear tooth deviation tolerance peak and pinion gear tooth deviation
tolerance Fβ'... 13
Table 7 -- Limit deviation of top-root distance M... 13
Table 8 -- Limit deviation of pin wheel single tooth pitch deviation ±fpt'... 14
Table 9 -- Tolerance of cumulative total deviation of pin wheel pitch Fp'... 15
Table 10 -- Inspection items for cycloidal gears and pin wheels... 15
Accuracy of cycloidal gear and pin wheel for cycloidal drives
1 Scope
This Standard specifies the terms and definitions, symbols, accuracy grades, tolerances
and limit deviations, and inspection items for the accuracy of cycloidal gears and pin
wheels in cycloidal pin wheel planetary transmissions.
This Standard applies to cycloidal gears and pin wheels in cycloidal pin wheel planetary
transmission reducers.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments (excluding
corrigendum) or revisions do not apply to this Standard, however, parties who reach an
agreement based on this Standard are encouraged to study if the latest versions of these
documents are applicable. For undated references, the latest edition of the referenced
document applies.
GB/T 1184-1996, Geometrical tolerancing. Geometrical tolerance for features
without individual tolerance indications (eqv ISO 2768-2.1989)
GB/T 1800.4-1999, Limits and fits Tables of standard tolerance grades and limit
deviations for holes and shafts (eqv ISO 286-2.1988)
GB/T 10107.1-1988, Basic terminology of cycloidal drives
GB/T 10107.3-1988, Symbols of geometrical data for cycloidal drives
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 10107.1
and GB/T 10107.3 as well as the following terms, definitions and symbols apply.
3.1 Single pitch deviation of cycloidal gears (fpt)
The algebraic difference between the actual tooth pitch and the theoretical tooth pitch
on the end plane, on a circle concentric with the axis of the cycloidal gear close to the
middle of the tooth height (see Figure 1).
3.2 Cumulative pitch deviation of cycloidal gears (Fpk)
The algebraic difference between the actual arc length and the theoretical arc length of
any K pitches (see Figure 1). Theoretically, it is equal to the algebraic sum of the
individual pitch deviations of these K pitches.
The tooth pitch number K is given by design.
3.3 Cumulative total deviation of cycloidal gear pitch (Fp)
The maximum cumulative pitch deviation within any arc segment (K=1 to K=Zc, Zc is
the number of teeth of the cycloidal gear) on the same side of the tooth surface of the
cycloidal gear. It is expressed as the total amplitude of the cumulative pitch deviation
curve.
3.4 Cycloidal gear tooth profile deviation (Fα)
The amount by which the actual tooth profile deviates from the designed tooth profile
within a complete tooth profile on the end plane. This amount is measured in the normal
direction of the designed tooth profile.
The complete tooth profile refers to the tooth profile corresponding to a theoretical pitch
angle between the roots of any two adjacent teeth of the cycloidal gear. The designed
tooth profile refers to the tooth profile that meets the design requirements.
3.5 Cycloidal gear tooth deviation (Fβ)
The end face distance between two theoretical tooth lines that encompass the actual
tooth line on a cylindrical surface coaxial with the cycloidal gear axis near the middle
of the tooth height, in the working part of the tooth width.
3.6 Cycloidal gear top-root distance deviation (M)
The difference between the actual distance and the theoretical distance between the top
of any tooth of a cycloidal gear and a tooth root at a 180° central angle relative to it.
NOTE. Pin tooth diameter is the diameter of the pointer tooth pin, and the outer diameter of the
tooth sleeve for pin tooth pointers with pin tooth sleeves.
3.13.2 Pin tooth roundness (fdy')
The roundness of the pin teeth on the end plane.
NOTE. The pin tooth roundness is the roundness of the pointer tooth pin. For pin teeth with pin
tooth sleeves, it refers to the roundness of the pin tooth sleeve.
3.14 Pin wheel tooth deviation (Fβ')
In the working part of the tooth width, the pin wheel tooth deviation Fβ' is composed of
the pin wheel tangential tooth deviation Fβt' and the pin wheel radial tooth deviation Fβr'.
The maximum value of the two is taken as the pin wheel tooth deviation.
3.14.1 Tangential tooth deviation of pin wheel (Fβt')
The tangential distance between the two theoretical tooth lines on the center cylindrical
surface of the pin tooth, which contains a generatrix on the cylindrical surface of the
pin tooth.
3.14.2 Radial tooth deviation of pin wheel (Fβr')
Relative to the axis of the pin wheel mounting hole, the end face radial distance between
the two theoretical tooth direction lines that encompass the inner generatrix of the
pinion teeth.
The axis of the pin wheel mounting hole refers to the straight line passing through the
center of the pin wheel mounting hole and perpendicular to the plane of the pin wheel
end. The inner busbar of the pin tooth refers to the busbar closest to the axis of the pin
wheel mounting hole.
3.15 Pin tooth center circle diameter deviation (Fd')
The difference between the actual diameter of the center circle of the pin teeth and the
theoretical diameter.
3.16 Pin tooth radial runout (Fr')
The maximum change in the probe position relative to the axis of the pin wheel
mounting hole when the probe radially contacts the inner generatrix of each pinion tooth
within one rotation of the pin wheel.
4 Accuracy levels, tolerances and limit deviations
4.1 The precision of cycloidal gears and pin wheels is divided into levels 5, 6, 7, 8 and
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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