CN217303820U - Harmonic gear transmission double-arc tooth profile detection tool - Google Patents

Abstract

The harmonic gear transmission double-arc tooth profile detection tool comprises an anti-deformation supporting tool consisting of a mandrel and a gland; the mandrel is used for clamping, and the gland is coaxially, rotatably and adaptively mounted on the mandrel body; the gland coaxially compresses and fixes the internal tooth steel gear or the external tooth flexible gear in the axial direction and prevents the internal tooth steel gear or the external tooth flexible gear from deforming; the device also comprises an external micrometer and a three-jaw internal micrometer; measuring heads of the outside micrometer and the three-jaw inside micrometer are respectively provided with a tooth-spanning arc measuring sheet; the tooth-crossing arc measuring sheet is provided with a measuring arc surface; measuring a circular arc surface spanning a plurality of teeth; and the arc surface is measured to fit with the tooth crest arc. The utility model adopts the cross-tooth arc measuring piece, combines with the anti-deformation supporting tool, and solves the technical problems that the inner and outer double-arc tooth profile detection of the inner tooth steel gear and the outer tooth flexible gear in the harmonic gear transmission has errors, is easy to deform, and takes much labor and time for detection; simple structure, economical and practical, high detection efficiency and high precision.

Description

Harmonic gear transmission double-arc tooth profile detection tool

Technical Field

The utility model belongs to the technical field of the physical diameter measuring device, concretely relates to harmonic gear drive biarc profile of tooth detects frock.

Background

As the involute tooth profile can not meet the high precision requirement, the novel tooth profile double-arc tooth profile is more and more widely applied. However, because the tooth space edge of the double-arc tooth profile is an arc, it is difficult to find a stopper pin which is exactly tangent to the tooth space edge, which causes instability of the detection result. Especially, when the detection is carried out on a machine tool, the plugging needle and the arc edge are easy to generate inclined sliding displacement, so that the detection result is inaccurate. In addition, the size of the plug needle is a number of thousands of digits, so that the manufacturing is difficult, and the machining precision and the consistency of the precision of the double-arc tooth form are difficult to control.

In the prior art, the main difference between the double-arc tooth form and the involute tooth form is that when the double-arc tooth form is displaced, the tooth form cannot widen or narrow; the teeth and the tooth grooves are not equal, when the displacement occurs, the tooth part is not changed, and only the tooth groove is changed. In this case, when detecting the double-arc tooth profile, the original method of detecting the insertion of the plug needle into the tooth space should be abandoned, and the addendum circle of the gear is used as a key parameter for detection, that is, the addendum circle diameter of the double-arc tooth profile can be used as an action equivalent to the M value in the involute tooth profile.

However, when the diameter of the addendum circle of the double-circular-arc tooth profile is used as a measurement parameter, problems still exist: referring to fig. 1, when the double-arc tooth profile of the inner steel gear 4 is detected, when the three-jaw inside micrometer 8 is used for detection, the phenomenon that (as shown in fig. 2) one jaw leans against the tooth crest circle and the other two jaws lean against the tooth socket easily occurs. The result of this is: theoretically, the vertex of a measuring head 9 of the three-jaw inside micrometer 8 is in contact with the addendum circular arc 1201 of the double circular arc tooth 12 of the internal tooth steel wheel 4, and the measured addendum circular arc is a real addendum circular arc; in fact, the vertex of the three-jaw measuring head 9 is in contact with the top edge 1202 of the double-arc tooth 12 of the internal-tooth steel wheel 4, so that the actual measured value is larger. I.e. the measured tip circle size is caused to be

And the actual addendum circle diameter is

The diameter of the two is in error

It can be seen that the tooling needs to be designed to ensure that the measured result is indeed the addendum circle diameter.

Moreover, because the internal tooth steel gear 4 and the external tooth flexible gear 5 of the harmonic gear transmission double-arc tooth form are thin-walled parts, when in measurement, the internal tooth steel gear 4 and the external tooth flexible gear 5 have deformation error influence, so that the tooth form measurement can be carried out on the premise of ensuring the roundness of the internal tooth steel gear 4 and the external tooth flexible gear 5, and an accurate detection result is obtained. For this reason, the following technical solutions are proposed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem: the utility model provides a harmonic gear drive biarc circular arc profile of tooth detects frock adopts and strides tooth arc shape quantity piece, combines to prevent the deformation support frock, solves in the harmonic gear drive that the internal tooth steel wheel and external tooth flexbile gear inside and outside biarc profile of tooth detect to have the error, detects the technical problem that takes a lot of work and trouble hard.

The utility model adopts the technical proposal that: the harmonic gear transmission double-circular-arc tooth profile detection tool comprises an anti-deformation supporting tool; the anti-deformation supporting tool consists of a mandrel and a gland; the shaft end of the mandrel is used for clamping, and the gland is coaxially, rotatably and adaptively mounted on the shaft body of the mandrel; the gland is used for axially and coaxially compressing and fixing the internal tooth steel gear or the external tooth flexible gear at the supporting and positioning position of the spindle body; the shape of the supporting and positioning part of the shaft body is matched with the shape of the position, easy to deform and roundness, of the internal tooth steel gear or the external tooth flexible gear in a fitting manner, and the position, easy to deform and roundness, of the supporting and positioning part of the shaft body is supported so as to prevent the internal tooth steel gear or the external tooth flexible gear from deforming; the device also comprises an external micrometer and a three-jaw internal micrometer; measuring heads of the outside micrometer and the three-jaw inside micrometer are respectively provided with a tooth-spanning arc measuring sheet; the tooth-crossing arc measuring sheet is provided with a measuring arc surface; measuring double circular arc teeth of which circular arc surfaces cross a plurality of internal tooth steel gears or external tooth flexible gears; and the circular arc surface is measured to be attached and matched with the tooth crest circular arc of the double circular arc teeth.

In the above technical solution, further: the middle part of the mandrel body of the external gear flexible gear is provided with an expansion mandrel 1 which is a supporting and positioning part of the mandrel body; the position of the external tooth flexible gear, which is easy to deform and has roundness, is an inner hole of the cylinder; the inner cylindrical surface of the inner hole of the cylinder body is fit and matched with the outer cylindrical surface of the shaft body of the expansion mandrel; the anti-deformation supporting tool for the external gear flexible gear further comprises a gasket; the gland of the external gear flexible gear is a nut piece; the nut piece compresses the end surface of the shaft outside the gasket; the gasket inner side shaft end face is pressed and attached to the outer side shaft end face of the solid expansion mandrel and the outer tooth flexible gear step shaft end face.

In the above technical solution, further: the center of the end face of the mandrel of the external gear flexible gear is provided with a central hole; the center hole is a conical hole with a vertex angle of 110-125 degrees.

In the above technical solution, further: the outside micrometer and the three-jaw inside micrometer are respectively provided with a knob for adjusting the measuring head and a display screen for displaying the detection value.

In the above technical solution, further: the center of the end face of a mandrel of the internal tooth steel wheel is provided with an inward concave counter bore; the concave counter bore is a shaft body supporting and positioning part of the mandrel; the inner teeth of the inner-tooth steel wheel are provided with positioning bosses extending axially; the positioning boss is the position of the easy-deformation roundness of the internal tooth steel wheel; the outer cylindrical surface of the positioning boss is fitted and matched with the inner cylindrical surface of the concave counter bore; an external thread is formed on the outer cylindrical surface of a mandrel 1 of the internal tooth steel wheel; the gland of the internal tooth steel wheel is provided with internal threads; the internal thread of the gland is screwed with the external thread of the mandrel so as to axially compress the internal gear steel wheel.

In the above technical solution, further: the tooth-crossing arc measuring piece is provided with a handheld part which is vertically connected with the measuring arc surface into a whole.

In the above technical solution, preferably: measuring the tooth pitch of the double circular arc teeth with the circular arc surface span ten times; the thickness of the arc measuring sheet of the tooth-crossing arc measuring sheet where the arc surface is measured is 0.5 mm.

In the above technical solution, preferably: the excircle runout of the mandrel is less than or equal to 0.005 mm.

The utility model has the advantages compared with the prior art:

1. the utility model discloses a harmonic gear transmission double-arc tooth profile detection tool comprises an anti-deformation support tool, a tooth-crossing arc measuring piece and a micrometer; wherein the shape of preapring for an unfavorable turn of events supports frock, strides tooth arc volume piece simple structure, and processing is convenient, and more stopper needle, profile of tooth measuring piece processing say, the utility model discloses frock simple structure, economy, practicality, easy realization.

2. The utility model discloses it compresses tightly to prevent that the deformation supports the frock and adopts the axial, and the mode that the circularity supported prevents to be surveyed the work piece and warp, eliminates the error influence that the work piece warp and brings, guarantees that the thin wall part is the degree of accuracy of harmonic gear transmission biarc tooth profile detection measurement size.

3. The utility model discloses clamping of dabber is once adjusted the dabber and is beated the control with the dabber excircle at the requirement within range, and the dabber will be fixed dead, and during processing a batch internal tooth rigid wheel, only need change the internal tooth rigid wheel, need not repeated alignment, the control tooth machining dimension's of being convenient for uniformity.

4. The tooth-crossing arc measuring piece of the utility model is provided with the hand-held part, which is convenient for filling the measuring piece; the size of the measuring sheet is controlled, so that the measuring sheet is prevented from bending and tilting to sink into a tooth socket, and the measuring precision is ensured; guarantee simultaneously that gauge piece elastic deformation volume control is at 0.3mm, to the external tooth flexible gear of same specification, because the gear modulus requires differently, the interval that the addendum circle differs is about 0.3mm, so just can measure the external tooth flexible gear of same specification with a pair of gauge piece, frock quantity is retrencied, convenient preparation, economical and practical.

5. The utility model discloses the numerical value that the display screen shows, through simple addition and subtraction calculation, just can obtain harmonic gear drive double circular arc tooth addendum circle diameter, size detection is accurate, simple, high-efficient.

6. The utility model discloses the detection frock is mainly measured with the help of present commonly used inside micrometer and outside micrometer, and measuring method is convenient, is fit for machine tool operator witnessed inspections.

Drawings

FIG. 1 is a diagram of the present detection state of the internal tooth steel wheel of the present invention;

FIG. 2 is an enlarged detail view of section I of FIG. 1;

FIG. 3 is a schematic structural view of the anti-deformation supporting tool for the external gear flexible gear of the present invention;

FIG. 4 is a diagram of a detection state of the external tooth flexible gear when an external micrometer and a tooth-crossing arc measuring plate are used;

FIG. 5 is a front view of the mid-span tooth arc blade of FIG. 4;

FIG. 6 is a cross-sectional view A-A of the cross-toothed arcuate blade of FIG. 5;

FIG. 7 is a detection state diagram of the internal gear steel wheel and the deformation-preventing support tool when the tooth-crossing arc amount and the three-jaw inside micrometer are used;

FIG. 8 is a schematic structural view of a mandrel in the anti-deformation supporting tool for the internal tooth steel wheel in FIG. 7;

FIG. 9 is a top view of the inner-tooth steel wheel and the cross-tooth arc gauge of FIG. 7 in a testing state;

FIG. 10 is a schematic drawing of the cross-tooth arc measuring tab size in FIG. 9;

FIG. 11 is a cross-sectional view taken through the mid-span tooth arc of FIG. 10;

in the figure: 1-mandrel, 2-gland, 3-shaft body supporting and positioning part, 4-internal gear steel wheel, 401-concave counter bore; 402-a positioning boss; 403-external threads; 404-internal thread; 5-an external gear flexible gear; 501-expansion mandrel, 502-cylinder inner hole; 503-a gasket; 504-compliant wheel step shaft end face; 505-a central hole; 6-easily deformed roundness position; 7-outside micrometer, 8-three-jaw inside micrometer; 9-measuring head; 901-knob, 902-display screen; 10-a cross-tooth arc measuring sheet; 11-measuring a circular arc surface; 1101-a hand-held portion; 12-double circular arc teeth; 1201-addendum arc; 1202-top flank edge.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to fig. 1 to 11 of the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

(as shown in fig. 3 and 7) the harmonic gear transmission double-arc tooth profile detection tool comprises an anti-deformation support tool.

The anti-deformation supporting tool comprises an anti-deformation supporting tool (figure 7) of the internal gear steel wheel 4 and an anti-deformation supporting tool (figure 3) of the external gear flexible wheel 5.

It should be noted that: therefore, the anti-deformation support tool is included, and the outer flexible gear is taken as an example, because when the tooth form parameter of the outer flexible gear 5 is measured, the wall thickness of the outer flexible gear 5 is thin and is oval in a natural state, an inner hole of the outer flexible gear 5 needs to be rounded by the mandrel 1, and the anti-deformation support tool needs to be used when the tooth form parameter of the outer flexible gear 5 is detected.

No matter be the deformation support frock of preapring for an unfavorable turn of events of internal tooth steel wheel 4, still the deformation support frock of preapring for an unfavorable turn of events of external tooth flexbile gear 5. The deformation-preventing supporting tool is composed of a mandrel 1 and a gland 2.

The shaft end of the mandrel 1 is used for coaxially fixing and clamping an anti-deformation supporting tool and a workpiece to be detected.

The shaft body of the mandrel 1 is coaxially screwed with the gland 2 in a matching manner; the gland 2 is used for coaxially pressing and fixing the internal tooth steel gear 4 or the external tooth flexible gear 5 at the axial supporting and positioning part 3 of the mandrel 1. The axial compression, support and fixation and deformation prevention support of the easily-deformed thin-wall part are realized. So as to ensure the detection precision of the tooth form of the workpiece to be detected.

To avoid deformation of the internally toothed steel wheel 4 and the externally toothed flexible wheel 5: the shape of axis body support location 3 and internal tooth steel wheel 4 or the yielding circularity position 6 shape laminating adaptation of external tooth flexible gear 5 department, and through axis body support location 3 supports yielding circularity position 6 prevents internal tooth steel wheel 4 or external tooth flexible gear 5 from warping.

Except that the deformation of preapring for an unfavorable turn of events supports the frock (as figure 4 and figure 7) the harmonic gear transmission biarc profile of tooth detects frock still includes external micrometer 7 and three-jaw internal micrometer 8.

The external micrometer 7 is used for detecting the double-arc tooth profile of the external flexible gear 5; the three-jaw inside micrometer 8 is used for detecting the double-arc tooth form of the internal tooth steel wheel 4.

In order to solve the problem that when the existing micrometer detects the double-arc tooth profile, the measuring head 9 is easy to fall on the tooth socket or the top edge of the tooth as shown in fig. 1 and fig. 2: and measuring heads 9 of the outside micrometer 7 and the three-jaw inside micrometer 8 are respectively provided with a tooth-spanning arc measuring sheet 10. Literally, the cross-teeth arc gauge 10 is used to span a plurality of double circular-arc teeth 12.

(as shown in fig. 5, 6, 10 and 11) the cross-tooth arc measuring sheet 10 is provided with a measuring arc surface 11; the measurement circular arc surface 11 spans the double circular arc teeth 12 of the internal tooth steel gears 4 or the external tooth flexible gear 5, and the measurement circular arc surface 11 is attached to and adapted to tooth crest circular arcs 1201 of the double circular arc teeth 12 (refer to fig. 4 and 9).

In the above embodiment, preferably: the span of the measuring arc surface 11 is ten times of the pitch of the double arc teeth 12; the thickness of the arc measuring sheet of the tooth-spanning arc measuring sheet 10 where the measuring arc surface 11 is located is 0.5 mm.

By adopting the size control of the measuring sheet, the bending and upwarping of the cross-tooth arc measuring sheet 10 are prevented from falling into the tooth socket, so that the measuring precision is ensured; meanwhile, the elastic deformation of the measuring sheet is controlled to be 0.3 mm.

External-tooth flexible gear 5 is taken as an example: for the external tooth flexible gear 5 with the same specification, because the gear modulus requirements are different, and the distance of addendum circle difference is about 0.3mm, the external tooth flexible gear 5 with the same specification can be measured by using a pair of measuring sheets, so that the number of the cross-tooth arc measuring sheets 10 is simplified, the tooling cost is greatly reduced, and the implementation is convenient.

In the above embodiment, further: the cross-tooth arc gauge 10 has a hand-held portion 1101 vertically connected to a measurement arc surface 11. The utility model discloses handheld portion 1101, the gauge head is filled up into to the convenience with crossing tooth arc shape gauge piece 10.

For the cross-tooth arc gauge 10 of the external gear flexspline 5: the outside micrometer (as shown in fig. 4) is used for constant force measurement, the force measurement is small, and the maximum measurement error is 0.002 mm-0.003 mm.

For the external-tooth flexible gear 5, the hand-held portion 1101 of the over-tooth arc gauge 10 is used for inserting the over-tooth arc gauge 10 between the gauge head 9 and the addendum circle of the external-tooth flexible gear 5, and making the right-angled position inside the hand-held portion 1101 fit with the root of the gauge head 9.

Before measurement, the knob 901 is adjusted, the measuring head 9 is moved to move until the measuring head 9 cannot move, at this time, the inner arc surface of the measuring arc surface 11 is tightly attached to the outer tooth top and the outer circle of the external tooth flexible gear 5, and the display screen reads out the measured value at this time as

The thickness Lr of the tooth-crossing arc measuring piece of the external gear flexible gear 5 is measured to be 0.5mm, and the span Br is ten times of tooth pitch. The design size ensures that the measuring sheet has a deformable range and is suitable for multi-size measurement. Thus, the size of the gauge pieces is designed, the radius of the circular arc of the gauge pieces can be guaranteed to have a deformation of about 0.3mm, and therefore for the external-tooth flexible gears 5 of the same specification, due to different gear module requirements, the distance between addendum circles is about 0.3mm, and therefore batch external-tooth flexible gears 5 of the same specification can be measured by using a pair of gauge pieces.

It should be noted that the deformation of the over-teeth arc-shaped gauge 10 herein refers to elastic deformation, and if plastic deformation of the over-teeth arc-shaped gauge 10 is caused, the new gauge is replaced. Within the effective elastic deformation range of the cross-tooth arc gauge 10, the detection precision is not affected.

Addendum circle of key parameter of the external tooth flexible gear 5

The addendum circle of the required external tooth flexible gear 5 can be obtained through simple calculation

The value is obtained.

In the same way: for the cross-tooth arc gauge 10 of the internally toothed steel wheel 4: the three-jaw inside micrometer 8 used (as shown in fig. 7 and 9) is a pistol digital display standard three-jaw inside micrometer, and the maximum measurement error is 0.002 mm-0.003 mm.

When the gear shaping of the internal tooth steel wheel 4 is finished and the three-jaw inside micrometer 8 is used for detection, the cross-tooth arc measuring piece 10 is also required to be inserted between the internal tooth of the internal tooth steel wheel 4 and the measuring head 9 of the three-jaw inside micrometer 8, the measuring head 9 is enabled to move outwards from the center by adjusting the knob of the three-jaw inside micrometer, and when the measuring head 9 cannot continue to move outwards, the display screen 902 of the three-jaw inside micrometer 8 displays that the measured value is measured value

The thickness Lg of the measuring sheet where the measuring arc surface 11 is located of the tooth-crossing arc-shaped measuring sheet 10 of the internal gear 4 is 0.5mm, the span Bg is 10 times of tooth pitch, and the design size is suitable for multi-size measurement in order to ensure that the measuring sheet has a deformable range.

The equivalent addendum circle size measured by the three-jaw inside micrometer 8 (combined with the figure 6) by adopting the scheme is

And a true equivalent addendum circle diameter of

The problem of errors set forth in the background art is solved by coincidence. Therefore, the addendum circle of the key parameters of the internal teeth of the internal-tooth steel gear 4 is required

Namely, the required addendum circle can be obtained through simple calculation

The value is obtained.

On the basis of the above embodiment, when the external flexible gear 5 is detected, in order to prevent the external flexible gear 5 from deforming:

(as shown in fig. 3) in the above embodiment, further: and an expansion mandrel 501 is arranged in the middle of the mandrel 1 of the external gear flexible gear 5. And the shaft end of the mandrel 1 of the external gear flexible gear 5 is used for clamping a tool and parts on a processing machine tool.

The expansion mandrel 501 is used for supporting and positioning the shaft body 3 of the mandrel 1. The position 6 of the external flexible gear 5, which is easy to deform and roundness, is a cylinder inner hole 502. The inner cylindrical surface of the cylinder inner hole 502 is matched with the outer cylindrical surface of the expansion mandrel 501 in a fitting mode, so that the inner support of the hollow thin-wall cylinder of the outer gear flexible gear 5 is achieved, and the weak position is prevented from deforming during detection.

The anti-deformation supporting tool for the external flexible gear 5 further comprises a gasket 503; the gland 2 of the external gear flexible gear 5 is a nut piece; the nut member presses the outer axial end surface of the gasket 503; the inner side shaft end face of the gasket 503 is tightly pressed against the outer side shaft end face of the expansion mandrel 501 and the flexible gear step shaft end face 504 of the external flexible gear 5.

Moreover, the inner hole 502 of the cylinder body of the external flexible gear 5 is installed in a small interference fit with the expansion mandrel 501, and the deformation-preventing support tool composed of the mandrel 1, the gland 2 and the gasket 503 can be used for deformation-preventing machining of hobbing of the external flexible gear 5. During gear hobbing, the external gear 5 part is fixed on a gear hobbing machine tool by the anti-deformation supporting tool and then is machined.

In the above embodiment, further: a central hole 505 is formed in the center of the end face of the mandrel 1 of the external gear flexible gear 5; the central hole 505 is a conical hole with a vertex angle of 110-125 degrees.

A central hole 505 is formed in the shaft end of the mandrel 1 of the external flexible gear 5, the central hole 505 enables the center of the expansion mandrel to be well positioned, and the central hole 505 is matched with the tip of a machine tool to be used, so that the coaxiality of external teeth machining of the external flexible gear 5 is guaranteed.

After the hobbing of the external flexible gear 5 is finished, when the hobbing precision needs to be detected, referring to the attached drawing 4, the deformation-preventing supporting tool does not need to be disassembled, the tooth-crossing arc measuring sheet 10 is directly padded between the measuring head 9 of the external micrometer 7 and the external teeth of the external flexible gear 5, and the hobbing precision of the external flexible gear 5 can be detected by using the external micrometer 7.

In the same way: when detecting the internal gear steel wheel 4, for avoiding the internal gear steel wheel 4 to warp:

in the above embodiment, further: the center of the end face of the mandrel 1 of the internal tooth steel wheel 4 is provided with an inward concave counter bore 401; the inner concave counter bore 401 is a shaft body supporting and positioning part 3 of the mandrel 1. The inner teeth of the internally toothed steel wheel 4 have axially extending locating bosses 402. The positioning boss 402 is a position 6 of the internal tooth steel wheel 4, which is easy to deform and roundness. The outer cylindrical surface of the positioning boss 402 is matched with the inner cylindrical surface of the concave counter bore 401 in an attaching mode, and deformation is prevented.

(as shown in FIG. 8) is axial compression: an external thread 403 is formed on the outer cylindrical surface of the mandrel 1 of the internal-tooth steel wheel 4; the gland 2 of the internal gear steel wheel 4 is provided with an internal thread 404; the internal thread 404 of the gland 2 is screwed with the external thread 403 of the mandrel 1 to axially press the internal gear 4.

In the above embodiment, preferably: the excircle runout of the mandrel 1 is less than or equal to 0.005 mm. It can be seen that, the utility model discloses the clamping of 1 a dabber is once adjusted dabber 1 and is beated the control with the dabber excircle and at the requirement within range, and dabber 1 will be fixed dead, and during a processing batch internal tooth rigid gear 4, only need change different internal tooth rigid gear 4, need not repeated alignment, the control tooth machining dimension's of being convenient for uniformity.

In the above embodiment, further: the outside micrometer 7 and the three-jaw inside micrometer 8 are respectively provided with a knob 901 for adjusting the measuring head 9 and a display screen 902 for displaying the detected value.

Wherein, as the aforesaid describes, the utility model discloses the numerical value that display screen 902 shows through simple calculation, just can obtain harmonic gear drive double circular arc tooth addendum circle diameter, and the size detects the structure accuracy, simply, high-efficient.

Through the above description, it can be found that: the utility model discloses detect the frock and mainly measure with the help of present commonly used three-jaw inside micrometer 8 and outside micrometer 7, measuring method is convenient, is fit for the lathe operator witnessed inspections. The designed span size of the cross-tooth arc measuring piece 10 ensures that a plurality of addendum circles can be surrounded during measurement, so that the measured diameter size of the addendum circle is closer to the real design size, and a more meaningful numerical reference is provided for the improvement of the design.

Furthermore, the utility model discloses shape support frock of preapring for an unfavorable turn of events adopts the axial to compress tightly, and the mode that the circularity supported prevents to be surveyed thin-walled part and warp, eliminates the error influence that is surveyed thin-walled part and warp and bring, guarantees that the thin-walled part is the degree of accuracy that harmonic gear drive biarc tooth profile detected the measurement size promptly.

Furthermore, if a method for measuring the precision of a common gear is used, measuring bars are used for measurement, and six groups of measuring bars are needed for measurement when six tooth shapes exist in the same size series; and adopt the utility model discloses frock technical scheme to same size series profile of tooth in the harmonic speed reducer ware, can only use a set of volume piece just can the precision measurement.

To sum up, the utility model is used for detect the processing precision of biarc dentiform in the harmonic gear transmission, the detection biarc dentiform that can be accurate fast controls the uniformity of processing precision. The harmonic gear transmission double-arc tooth profile detection tool of the utility model consists of an anti-deformation support tool, a tooth-crossing arc measuring piece 10 and a micrometer; the anti-deformation supporting tool and the cross-tooth arc measuring piece 10 are simple in structure and convenient to process; compared with the processing of a stopper needle and a tooth profile measuring sheet, the utility model discloses frock simple structure, economy, practicality, easy realization.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (8)

1. Harmonic gear drive biarc profile of tooth detects frock, its characterized in that: comprises an anti-deformation supporting tool; the deformation-preventing supporting tool consists of a mandrel (1) and a gland (2); the shaft end of the mandrel (1) is used for clamping, and a gland (2) is coaxially, rotatably and fittingly installed on the shaft body of the mandrel (1); the gland (2) is used for axially and coaxially compressing and fixing the internal tooth steel gear (4) or the external tooth flexible gear (5) at a shaft body supporting and positioning part (3) of the mandrel (1); the shape of the shaft body supporting and positioning part (3) is fitted and matched with the shape of an easily deformed roundness position (6) of the internal gear (4) or the external gear (5), and the easily deformed roundness position (6) is supported by the shaft body supporting and positioning part (3) so as to prevent the internal gear (4) or the external gear (5) from deforming; the device also comprises an external micrometer (7) and a three-jaw internal micrometer (8); the measuring heads (9) of the external micrometer (7) and the three-jaw internal micrometer (8) are respectively provided with a tooth-crossing arc measuring sheet (10); the tooth-crossing arc measuring sheet (10) is provided with a measuring arc surface (11); the measuring circular arc surface (11) spans the double circular arc teeth (12) of the internal tooth steel gears (4) or the external tooth flexible gears (5); and the measuring arc surface (11) is fitted and matched with the tooth crest arc (1201) of the double-arc tooth (12).

2. The harmonic gear transmission double-circular-arc tooth profile detection tool according to claim 1, characterized in that: an expansion mandrel (501) is arranged in the middle of the shaft body of the mandrel (1) of the external gear flexible gear (5), and the expansion mandrel (501) is used for supporting and positioning the shaft body (3) of the mandrel (1); the position (6) of the external gear flexible gear (5) at which the roundness is easy to deform is an inner hole (502) of the cylinder; the inner cylindrical surface of the inner hole (502) of the cylinder body is fit and matched with the outer cylindrical surface of the shaft body of the expansion mandrel (501); the anti-deformation supporting tool of the external flexible gear (5) further comprises a gasket (503); the gland (2) of the external gear flexible gear (5) is a nut piece; the nut member presses the outer side shaft end surface of the gasket (503); and the inner side shaft end surface of the gasket (503) is tightly pressed and attached to the outer side shaft end surface of the expansion mandrel (501) and the flexible wheel step shaft end surface (504) of the external flexible wheel (5).

3. The harmonic gear transmission double-circular-arc tooth profile detection tool according to claim 2, characterized in that: the center of the shaft end face of the mandrel (1) of the external gear flexible gear (5) is provided with a central hole (505); the center hole (505) is a conical hole with a vertex angle of 110-125 degrees.

4. The harmonic gear transmission double-circular-arc tooth profile detection tool according to claim 1, characterized in that: the outside micrometer (7) and the three-jaw inside micrometer (8) are respectively provided with a knob (901) for adjusting a measuring head (9) and a display screen (902) for displaying a detection value.

5. The harmonic gear transmission double-circular-arc tooth profile detection tool according to claim 1, characterized in that: the center of the end face of the mandrel (1) of the internal-tooth steel wheel (4) is provided with an inward concave counter bore (401); the concave counter bore (401) is a shaft body supporting and positioning part (3) of the mandrel (1); the inner teeth of the inner-tooth steel wheel (4) are provided with positioning bosses (402) extending axially; the positioning boss (402) is a position (6) at which the internal tooth steel wheel (4) is easy to deform and roundness; the outer cylindrical surface of the positioning boss (402) is fitted and matched with the inner cylindrical surface of the concave counter bore (401); an external thread (403) is formed on the outer cylindrical surface of the mandrel (1) of the internal-tooth steel wheel (4); the gland (2) of the internal tooth steel wheel (4) is provided with internal threads (404); the gland (2) is internally threaded (404) and is screwed with the mandrel (1) externally threaded (403) to axially compress the internal gear (4).

6. The harmonic gear transmission double-circular-arc tooth profile detection tool according to claim 1, characterized in that: the tooth-crossing arc-shaped measuring piece (10) is provided with a handheld part (1101) which is vertically connected with the measuring arc surface (11) into a whole.

7. The harmonic gear transmission double-circular-arc tooth profile detection tool according to claim 1 or 6, characterized in that: the span of the measuring arc surface (11) is ten times of the pitch of the double arc teeth (12); the thickness of the arc measuring piece of the tooth-crossing arc measuring piece (10) where the measuring arc surface (11) is located is 0.5 mm.

8. The harmonic gear transmission double-circular-arc tooth profile detection tool according to claim 1, 2, 3 or 5, characterized in that: the excircle runout of the mandrel (1) is less than or equal to 0.005 mm.

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