CN105698647A - Rapid measurement apparatus for tooth thickness of involute gear - Google Patents

Rapid measurement apparatus for tooth thickness of involute gear Download PDF

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Publication number
CN105698647A
CN105698647A CN201610171715.2A CN201610171715A CN105698647A CN 105698647 A CN105698647 A CN 105698647A CN 201610171715 A CN201610171715 A CN 201610171715A CN 105698647 A CN105698647 A CN 105698647A
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China
Prior art keywords
gear
tooth thickness
bar
transverse tooth
housing
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CN201610171715.2A
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CN105698647B (en
Inventor
徐瀚
王战强
符嘉靖
陆堰龙
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CRRC Qishuyan Institute Co Ltd
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CRRC Qishuyan Institute Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical means
    • G01B5/02Measuring arrangements characterised by the use of mechanical means for measuring length, width or thickness
    • G01B5/06Measuring arrangements characterised by the use of mechanical means for measuring length, width or thickness for measuring thickness

Abstract

The invention, which belongs to the technical field of mechanical processing detection, relates to a rapid measurement apparatus for the tooth thickness of an involute gear. A driving gear and an angle sensing gear that are in a gear driving connection mode are supported on a housing of the measurement apparatus; the driving wheel is fixedly connected with a movable measuring rod having an outer end with a measuring head; a reference measuring rod having an outer end with a measuring head is installed at one side of the movable measuring rod correspondingly; and the reference measuring rod and the housing are fixedly connected. Besides, an angle sensing gear rotation angle collection unit is installed on the housing; and a signal output terminal of the collection unit is connected with an intelligent measuring module. When the housing is controlled and thus the measuring head at the outer ends of the two measuring rods are embedded into corresponding tooth grooves of a to-be-measured gear and a rotation angle change relative to an initial position is obtained; and thus with conversion of an intelligent device, a needed tooth thickness parameter can be obtained conveniently, rapidly, and accurately.

Description

A kind of involute gear transverse tooth thickness rapid measurement device
Technical field
The present invention relates to the measurement apparatus of a kind of gear tooth thickness, especially a kind of involute gear transverse tooth thickness rapid measurement device, belong to machining detection technique field。
Background technology
The transverse tooth thickness value of involute gear is always up in design of gears, processing and mapping one of of paramount importance gear parameter, how to measure the transverse tooth thickness value of gear accurately, is directly connected to the quality of the stable of Gearmaking Technology and end product quality。In the operations such as the such as gear hobbing, gear shaping of gear volume manufacturing process, mill teeth, roll flute, if transverse tooth thickness value accurately can not quickly effectively be measured, production efficiency and quality all can certainly will be produced harmful effect。
According to the applicant understood, for a long time, the tooth thickness measuring that medium accuracy gear is the most frequently used is that common normal is measured and across rod (ball) from measurement。The advantage of both approaches is that measuring principle is precise geometrical model and is absent from theoretical error, and certainty of measurement is high, and corresponding survey tool is also fairly simple convenient, is therefore generally used。But it is found that, common normal and across rod (ball) from measuring all certain limitation: 1. common normal is measured because the restriction of measuring principle cannot be used for the measurement of internal gear, the helical gear short for the big facewidth of helical angle can not be suitable for, additionally encounter large modulus or and the gear of short tooth depth, more cannot measuring owing to cannot obtain suitable measurement point, above-mentioned situation can only use across rod (ball) from measurement;2. require that operator manually fix the length bar (ball) placed in two opposition teeth groove across rod (ball) when measuring from measuring, simultaneously use length micrometer measure its across rod (ball) from, often a people is difficult to operation, and need two people's cooperations just can complete, in addition operator have also needed accurately " feel ", can with feel to find across rod (ball) from extreme value, so layman is difficult to ensure that measurement result is accurate。For the ring gear that reference circle is very big, measure across rod (ball) from needs by large-scale internal diameter length micrometer, generally require many people and assist just can complete to measure, extremely inconvenience, it does not have the micrometer of appropriate length just cannot complete measurement。
For above-mentioned across rod (ball) from measuring the limitation existed, be currently mainly made by auxiliary device and special survey tool overcome, mainly by mechanism's fixed amount ball and measure across excellent (ball) from device。Such device is no longer necessary to artificial righting length bar (ball), with carrying micrometer on timer, it is possible to easily and fast the gear of particular size is measured。But facts have proved, these devices still suffer from some shortcomings part, first in view of across rod (ball) from measuring principle, when gear compound graduation circle increases, required measurement apparatus equally also to increase, and manufacturing cost is huge, hence it is evident that uneconomical, so being only used for the little gear of reference circle across rod (ball) from measurement, next to that measurement scope has limitation and the inside and outside tooth can not be general;Additionally these devices are typically only capable to use in stationary applica-tions, need to move tested gear and could measure operation to specified measurement position, for batch production, it is clear that time and effort consuming, it is impossible to as producing the survey tool patrolled and examined with self-inspection。
Summary of the invention
It is an object of the invention to: the weak point existed for above-mentioned prior art, propose a kind of being suitable to and include the involute gear transverse tooth thickness rapid measurement device that all kinds of special involute gear transverse tooth thickness such as large modulus, large helix angle, the short facewidth, short tooth depth, large-scale ring gear are measured, also relate to corresponding measuring method。
Mathematics geometrical relationship according to involute gear can derive following transverse tooth thickness and any teeth groove span rod (ball) from mathematical relationship:
1) length bar (ball) and gear centre from functional relationship derive (illustrating, internal gear in like manner can push away) with external gear
As it is shown in figure 1, length bar (ball) is placed on diagram tooth slot position when measuring, and distribution is tangent with left and right face, according to geometrical relationship now, is not difficult to draw that length bar (ball) center length bar (ball) and gear centre are from ryComputing formula:
ry=rb/cos(αy) can obtain:
αy=arccos (rb/ry)(1)
In formula, rbFor rolling circle radius, αyFor gear at ryThe pressure angle at place。
α can also be derived simultaneouslyyComputing formula:
invαy=μ+θc+ψ-π/z
=dk/db+s/d+invα-π/z(2)
=inv α+2*x*tan (α)/z+dk/db-π/(2*z)(3)
In above formula, μ was involute and basic circle intersection point, gear centre, length bar (ball) and right flank of tooth point of contact, the angle of line at length bar (ball) center;θcFor the right flank of tooth involute involuted angle at length bar (ball) Yu right flank of tooth point of contact place;ψ is length bar (ball) and right flank of tooth point of contact, gear centre, tooth center line, the angle of line;Z is number of gear teeth;DkFor length bar (ball) diameter;DbFor rolling circle diameter;S is reference circle transverse tooth thickness;D is reference diameter;α is gear compound graduation circle pressure angle;Infolute function inv α=tan (α)-α;X is Modification Coefficient of Gear。
Again formula (1) is substituted into formula (2) can obtain:
inv(arccos(rb/ry))=dk/db+s/d+invα-π/z(4)
2) length bar (ball) and gear centre from measuring and design
Actual measure, only r in formula (4)yIt is unknown with transverse tooth thickness s, it can be seen that ryIt is function of a single variable relation with transverse tooth thickness s, say, that as long as r can accurately be recordedyValue can determine transverse tooth thickness s according to this functional relationship, therefore as in figure 2 it is shown, place two length bars (ball) (in figure for convenience of set forth across 3 teeth, in reality can across optional tooth number i), according to geometrical principle in figure it follows that
ry=L/ (2*sin (α 1/2)) (5)
L=2*L1*sin (α 2/2) (6)
Simultaneous (5), (6) two formulas can obtain
ry=L1*sin (α 2/2)/sin (α 1/2) (7)
In formula, L is two length bars (ball) centre-to-centre spacing, α 1 is the angle at two length bars (ball) center and gear centre line, α 1=2*i* π/z (i be between two length bars (ball) institute across the number of teeth), L1 is the length that measurement apparatus two measures bar, and α 2 is the angle between two measurement bars。Being not difficult to find out by formula (7), as long as α 2 can measure, according to above-mentioned formula relationship, transverse tooth thickness value also can be determined completely, so finally determining that α 2 measures object to be accurately obtained the transverse tooth thickness value of required measurement conveniently by conversion。
Deriving based on above geometrical relationship, in order to reach object above, the involute gear transverse tooth thickness rapid measurement device basic technical scheme that applicant proposes is: include housing, and described housing supports driving gear and angle sensor gear that gear drive connects;Described driving gear has with outer end to be measured head movable and measures that bar is fixing to be connected, and the side of described movable measurement bar disposes outer end to have the reference measure bar measuring head accordingly, and described reference measure bar is connected with housing;Being also equipped with angle sensor gear corner collecting unit on described housing, the signal output part of described collecting unit connects intelligent detecting module。
When manipulation housing make two measurement bar outer ends measure head be respectively embedded in the corresponding teeth groove of gear under test, it is thus achieved that it changes relative to the corner of initial position, can by the conversion of intelligent device, convenient quickly and accurately obtain required transverse tooth thickness parameter。
It is that described shell also supports the volume bar gear engaging and having return trend with angle sensor gear that the present invention further improves。Therefore, it can keep movably measuring bar and there is the trend drawing close reference measure bar, automatically eliminate back lash that may be present, it is ensured that certainty of measurement。
Further, described housing inner support is in transmission connection by driven gear transition driving gear and angle sensor gear;Described driving gear is all higher than 1 with the gear ratio of driven gear and the gear ratio of described driven gear and angle sensor gear。
Further, described angle sensor gear and angular transducer are coaxially fixed。
Further, described angle sensor gear engages with volume bar gear, and described volume bar gear face is equipped with volume bar spring。
Further, the housing of described angular transducer side is built with the capture card as corner collecting unit。
Further, described capture card side is installed and is had an input key and panel that LED shows。
Further, between the measurement bar that described capture card is got by angular transducer, corner voltage signal is converted to digital signal by A/D modular converter, and output is to as in the PLC of intelligent detecting module。
Further, described housing is the box-like of lower openings, and top has handle。
Further, described measurement head is measuring stick or measures ball。
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated。
Fig. 1 be length bar (ball) with gear centre from geometrical relationship schematic diagram。
Fig. 2 is transverse tooth thickness and the geometrical relationship schematic diagram measuring angle。
Fig. 3 is the structural representation of one embodiment of the invention。
Fig. 4 is the structural representation at another visual angle of Fig. 1 embodiment。
Fig. 5 is the schematic block circuit diagram of Fig. 1 embodiment。
Fig. 6 is the schematic diagram that Fig. 1 embodiment is applied to that external gear transverse tooth thickness is measured。
Fig. 7 is the schematic diagram that Fig. 1 embodiment is applied to that internal gear transverse tooth thickness is measured。
Detailed description of the invention
Embodiment one
As shown in Figure 3 and Figure 4, box-like housing 13 top of lower openings has handle 12 to the involute gear transverse tooth thickness rapid measurement device of the present embodiment。Driving gear 4 that housing 13 inner support is in transmission connection by driven gear 5 transition and angle sensor gear 6, driving gear 4 engages with the little sideshake of driven gear 5 and gear ratio is i1, driven gear 5 engages with the little sideshake of angle sensor gear 6 with end plate and gear ratio is i2, angle sensor gear 6 and angular transducer 9 are coaxially fixed, and therefore the rotational angle of driving gear 4 is exaggerated i when being delivered to angular transducer 9 by gear drive1*i2Again (the present embodiment is 2*2 times)。
Driving gear 4 and outer end have the movable bar 3 of measuring of measuring stick (or ball) 1 and are fixedly and coaxially connected, the movable arrangement outer end, side measuring bar 3 has the reference measure bar 2 of measuring stick (or ball) 1 ', two measuring sticks (or ball) are isometrical, two measurement bars are isometric, movable bar 3 of measuring can rotate relative to the reference measure bar 2 being fixed on housing 13 around the wheel shaft of driving gear 4, during actual measurement, two angles measured between bar are above-mentioned α 2 jiaos, in Fig. 3, dotted line position is measure initial dead-center position, and now two angles measuring bar are definite value。Owing to driving gear 4 is fixedly and coaxially connected with movable bar 3 of measuring, Gu movably measurement bar 3 and its angle when dotted line position are the rotational angle of driving gear 4。
In addition, angle sensor gear 6 also engages with volume bar gear 7, this volume bar gear 7 end face is equipped with a volume bar spring 8, this volume bar spring 8 is micro-tighten up state movable measurement when bar 3 is in the zero-bit of Fig. 3 dotted line, when movable measurement bar 3 is measured and is rotated, volume bar gear 7 also will rotate simultaneously, volume bar spring 8 tightens up further, the reactive torque acted on volume bar gear 7 is also gradually increased, so that all gears all obtain reactive torque, guarantee unilateral flank engagement each other, eliminate gear backlash, ensure that the stability of measurement and accuracy, the existence of reactive torque simultaneously also makes movably to measure bar 3 and has the return trend drawn close to reference measure bar 2 all the time, realize the Automatic-clamping of measuring stick (ball) in measurement process, convenient operation, and further ensure stablizing of measurement, accurately。
The housing 13 of angular transducer 9 side is built with capture card 10, thus constituting the corner collecting unit of angle sensor gear 6。Capture card 10 side is also installed has an input key and panel 11 that LED shows。The present embodiment selects the bright M4500 angular transducer of rice, and its effective travel is 0-355 °, linear precision ± 0.075%, repeatable accuracy 0.007 °。It is set as 100mm owing to measuring the long L1 of lever arm, deduces the transverse tooth thickness measurement error that causes of known angular transducer repeatable accuracy less than 0.002mm according to geometric formula, certainty of measurement requirement can be met completely。
As it is shown in figure 5, corner voltage signal is converted to digital signal by A/D modular converter between the measurement bar that got by angular transducer 9 of capture card 10, export as in the PLC of intelligent detecting module, the key-press input of PLC and show output port junction plate 11。
During measurement, first draw close movably measuring bar 3 with reference measure bar 2, after two measuring sticks (or ball) contact with each other, press the zero-bit key on lower panel 11。Now LED show value zero on panel 11, after being inputted the basic parameter of tested gear by digital keys and pressed acknowledgement key, PLC obtains the initializaing variable value of gear。With reference to Fig. 6 or Fig. 7, take the circumstances into consideration to be respectively placed in corresponding teeth groove in across the number of teeth by two length bars (ball) according to what input, and hold handle 12 to teeth groove direction gentle force, two length bars (ball) all can (helical gear to ensure that the maintenance of Liang Liang ball center line and increment face is vertical) with after the left and right face of teeth groove。In the process, the movable angle measuring bar 3 and reference measure bar 2 is transmitted by gear drive and is amplified in angular transducer 9, angular transducer 9 is converted to the signal of telecommunication after the voltage force value of angle being obtained by capture card 10 and passes to PLC, PLC then calculates the measurement results such as gear tooth thickness value, common normal according to this angle value and preset calculating function, is shown in real time by the light-emitting diode display on panel 11。
Practice have shown that, the transverse tooth thickness measurement apparatus adopting the present embodiment can easily realize gear tooth thickness and quick and precisely measure, and measurement apparatus is with self-centering function, (distance over bar measurement etc.) rigors to operator's feel is measured without tradition transverse tooth thickness, it is absent from theoretical error, transverse tooth thickness suitable in all kinds of internal tooths and external tooth is measured, it is particularly well suited to the measurement of large-scale ring gear, additionally can passing through to change length bar and the amount ball of different size, the spur gear and the helical gear transverse tooth thickness that meet all kinds of modulus are measured。
In addition to the implementation, the present invention can also have other embodiments。All employings are equal to replacement or the technical scheme of equivalent transformation formation, all fall within the protection domain of application claims。

Claims (10)

1. an involute gear transverse tooth thickness rapid measurement device, including housing, it is characterised in that: described housing supports driving gear and angle sensor gear that gear drive connects;Described driving gear has with outer end to be measured head movable and measures that bar is fixing to be connected, and the side of described movable measurement bar disposes outer end to have the reference measure bar measuring head accordingly, and described reference measure bar is connected with housing;Being also equipped with angle sensor gear corner collecting unit on described housing, the signal output part of described collecting unit connects intelligent detecting module。
2. involute gear transverse tooth thickness rapid measurement device according to claim 1, it is characterised in that: described shell also supports the volume bar gear engaging and having return trend with angle sensor gear。
3. involute gear transverse tooth thickness rapid measurement device according to claim 2, it is characterised in that: driving gear that described housing inner support is in transmission connection by driven gear transition and angle sensor gear;Described driving gear is all higher than 1 with the gear ratio of driven gear and the gear ratio of described driven gear and angle sensor gear。
4. involute gear transverse tooth thickness rapid measurement device according to claim 3, it is characterised in that: described angle sensor gear and angular transducer are coaxially fixed。
5. involute gear transverse tooth thickness rapid measurement device according to claim 4, it is characterised in that: described angle sensor gear engages with volume bar gear, and described volume bar gear face is equipped with volume bar spring。
6. involute gear transverse tooth thickness rapid measurement device according to claim 5, it is characterised in that: the housing of described angular transducer side is built with the capture card as corner collecting unit。
7. involute gear transverse tooth thickness rapid measurement device according to claim 6, it is characterised in that: described capture card side is installed has an input key and panel that LED shows。
8. involute gear transverse tooth thickness rapid measurement device according to claim 7, it is characterized in that: between the measurement bar that described capture card is got by angular transducer, corner voltage signal is converted to digital signal by A/D modular converter, and output is to as in the PLC of intelligent detecting module。
9. involute gear transverse tooth thickness rapid measurement device according to claim 8, it is characterised in that: described housing is the box-like of lower openings, and top has handle。
10. involute gear transverse tooth thickness rapid measurement device according to claim 9, it is characterised in that: described measurement head is measuring stick or measures ball。
CN201610171715.2A 2016-03-24 2016-03-24 A kind of involute gear transverse tooth thickness rapid measurement device Active CN105698647B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107631678A (en) * 2017-08-25 2018-01-26 安徽申德精密机械有限公司 A kind of gear distance over bar measurement apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5513442A (en) * 1994-11-22 1996-05-07 Illinois Tool Works Inc. Apparatus for inspecting a gear
CN1504720A (en) * 2002-12-04 2004-06-16 松下电器产业株式会社 Detecting apparatus for angle of rotation
CN202115201U (en) * 2011-05-26 2012-01-18 上海市格致初级中学 Compass capable of display degree of angle
CN202442663U (en) * 2012-02-22 2012-09-19 桂林市晶瑞传感技术有限公司 Digital display angle snap gauge
CN203385390U (en) * 2013-08-16 2014-01-08 李学峰 Transmission monitoring device for rotating shaft
CN205580341U (en) * 2016-03-24 2016-09-14 中车戚墅堰机车车辆工艺研究所有限公司 Quick measuring device of involute gear tooth thickness

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5513442A (en) * 1994-11-22 1996-05-07 Illinois Tool Works Inc. Apparatus for inspecting a gear
CN1504720A (en) * 2002-12-04 2004-06-16 松下电器产业株式会社 Detecting apparatus for angle of rotation
CN202115201U (en) * 2011-05-26 2012-01-18 上海市格致初级中学 Compass capable of display degree of angle
CN202442663U (en) * 2012-02-22 2012-09-19 桂林市晶瑞传感技术有限公司 Digital display angle snap gauge
CN203385390U (en) * 2013-08-16 2014-01-08 李学峰 Transmission monitoring device for rotating shaft
CN205580341U (en) * 2016-03-24 2016-09-14 中车戚墅堰机车车辆工艺研究所有限公司 Quick measuring device of involute gear tooth thickness

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107631678A (en) * 2017-08-25 2018-01-26 安徽申德精密机械有限公司 A kind of gear distance over bar measurement apparatus
CN107631678B (en) * 2017-08-25 2019-07-02 安徽申德精密机械有限公司 A kind of gear distance over bar measuring device

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