RU2019782C1 - Appliance for gear wheel run-out gauge - Google Patents

Abstract

FIELD: checking gear wheels. SUBSTANCE: appliance is installed on movable carriage of run-out gauge. It has two linear displacement transducers linked with two double-arm levers, third rigid lever seated between double arm levers. Spherical ends of levers are engaged respectively with three adjacent profiles of gear wheel. In the course of gear wheel check, appliance moves in radial direction of gear wheel to stop available on run-out gauge housing. Gear wheel turns through one pitch after every cycle of gear wheel check. Appliance makes it possible to check tangential displacements of those points of gear wheel teeth profile, which are located on one circumference and to additionally exclude influence of tooth height error onto results of measurements performed with the aid of run-out gauge. EFFECT: improved accuracy of measurements. 2 cl

Description

 The invention relates to mechanical engineering and can find application in controlling the accuracy of gears in laboratory and industrial conditions, as well as in the training of specialists in gear cutting.

 To control the tangential displacements of adjacent profiles, edge gauges are used. Edge toothometers make it possible to measure tangential displacements with the base from the diameters of tooth protrusions or from a stationary stationary base. With this measurement, the accuracy of measuring the tangential displacements of the profiles of the gear teeth is reduced. Therefore, the disadvantage of such devices is their low measurement accuracy.

 Closest to the invention is a biomeasure device for monitoring gears. The device consists of a housing, two linear displacement transducers and associated measuring levers with spherical tips. The disadvantage of this device is that during the radial movement of the measuring arm in contact with two profiles of the same cavity, the contact points along the ring gear are shifted in the radial direction, due to the presence of radial runout of the ring gear. Therefore, when controlling the gear wheel, the points at which the tangential displacements of the profiles are determined will not lie on the same circle. The readings of both linear displacement transducers will be affected by errors, tooth profiles in height, i.e. in the measured values will be introduced errors depending on the nature of changes in the error profiles. All this will not allow to control with high accuracy the values of the tangential displacements of the points of the profiles lying on one circle relative to the working axis of the wheel.

 The aim of the invention is to increase the accuracy of determining the values of the tangential displacements of the points of the profiles lying on the circumference of the concentric working axis of the wheel relative to their theoretical position. This goal is achieved by the fact that it is equipped with an additional third lever, the first and third levers are spring-loaded relative to the second located between them, and all three levers are made with spherical tips designed to interact with three adjacent profiles at points lying on the same circle.

 In FIG. 1 shows a structural diagram of a device; figure 2 - arrangement of the profiles of the teeth of the actual wheel relative to their theoretical positions.

 The device comprises a housing 1, a dial indicator 2, a two-arm lever 3, a spring 4, a spring 5, a dial indicator 6, a two-arm lever 7, an emphasis 8, and a lever 9.

 The device consists of a housing 1, which is mounted on a movable carriage beater. Two-arm levers 3 and 7 and a lever 9 with spherical tips on the working end in contact with the tooth profiles are installed on the device case 1. Sentinel indicators 2 and 6 are in contact with the other ends of the two-arm levers 3 and 7. The springs 4 and 5 draw on the two-arm levers 3 and 7, while ensuring that the spherical tips 3, 7 and 9 are in contact with the profiles of the wheel being monitored.

 Before operation, the device must be adjusted depending on the number of teeth and the module of the controlled wheel so that the contact points of the levers 3, 7 and 9 with the tooth profiles lie on one circle concentric with the working axis of the wheel.

Figure 2 shows the intersection points of the actual and theoretical profiles with the circle along which the control of errors of the ring gear is carried out. Points A ₁ , B ₁ , B ₁ , G ₁ and D ₁ lie on the theoretical profiles; points A ₂ , B ₂ , B ₂ , G ₂ and D ₂ lie on real profiles.

 A device for biomemer for monitoring gears works as follows.

, ^Ftrл2⁼

^. (1)
При втором измерении, когда с тремя сферическими наконечниками рычагов 3, 7 и 9 войдут в контакт профили зуба 2 и правый профиль зуба 3, то индикатор часового типа 6 покажет величину И₁, равную сумме величин отрезков Г₁Г₂ и В₁В₂, т.е.The casing of the device 1 on the biomeasurer moves in the radial direction in the direction of the arrow A. In this case, the entire device is radially fed until the stop 8 on the casing of the device 1 contacts with the focus on the stationary casing of the biomeasureer. The spherical tips of the two-arm levers 3 and 7, as well as the lever 9, come in contact with three adjacent profiles on the gear wheel. For example, as shown in figure 1 with the left and right tooth profiles 1 and with the right tooth profile 2. Continuous contact of the levers 3 and 7 with the tooth profiles is provided by the springs 4 and 5. Moreover, the stiffness of the spring 5 should be greater than the stiffness of the spring 4. After implementation full contact of the spherical tips of the levers 3, 7 and 9 with the tooth profiles, the values of the tangential displacements of the two tooth profiles relative to the third middle profile are fixed. During the control, the initial condition is selected, when during the first measurement the points A ₁ and A _{2 are} combined. In this position of the monitored wheels, the measurement base will be both point A ₁ and point A ₂ . During the first measurement at points B ₂ and B _2, tangential displacements are fixed depending on the values of the segments B ₁ B ₂ and B ₁ B ₂ and calculated by the formulas
F _trn1 =

, ^F trl2 ⁼

^. (1)
In the second measurement, when the tooth profiles 2 and the right tooth profile 3 come into contact with the three spherical tips of the levers 3, 7 and 9, the dial gauge 6 will show the value And ₁ , equal to the sum of the values of the segments G ₁ G ₂ and B ₁ V ₂ , i.e.

AND ₁ = В ₁ В ₂ + Г ₁ Г ₂ , (2) and the linear displacement transducer 2 will show the value And ₂ equal to the difference between the segments Д ₁ Д ₂ and Г ₁ Г ₂ , i.e.

_-

_. (4)
Из формулы (3) определяется тангенциальное смещение правого профиля зуба 3 от его теоретического положения по формуле
F_trn3=

+F_trл2 . (5)
Таким образом, проводя последовательные измерения по зубчатому венцу, определяют тангенциальные смещения действительных положений профилей от их теоретических положений для всех зубьев зубчатого венца колеса.And ₂ = D ₁ D ₂ - G ₁ G ₂ . (3)
From the formula (2), the tangential displacement of the left profile 2 from its theoretical position is determined by the formula

_-

_. (4)
From the formula (3), the tangential displacement of the right profile of tooth 3 from its theoretical position is determined by the formula
F _trn3 =

+ F _trl2 . (5)
Thus, by conducting sequential measurements along the ring gear, the tangential displacements of the actual positions of the profiles from their theoretical positions for all the teeth of the ring gear are determined.

 Applying the device to a biomeasure for monitoring gears will allow you to realize the following advantages: replace the use of expensive stationary universal gear measuring instruments; use controllers of lower qualifications.

Claims (1)

 DEVICE FOR BEATMETER FOR CONTROL OF GEAR WHEELS, containing two linear displacement transducers kinematically connected with corresponding levers, characterized in that, in order to increase the accuracy of determining the values of tooth profile displacements in the tangential direction, it is equipped with an additional third lever, the first and third levers are spring loaded relative to the second, located between them, and all three levers are made with spherical tips designed to interact with three adjacent profiles in points lying on one circle.

Images