CN103353269A - Measurement apparatus used to measure gear diameter and measurement method thereof - Google Patents

Abstract

The invention discloses a measurement apparatus used to measure a gear diameter and a measurement method thereof. The measurement apparatus comprises a main scale component and a measurement component. The main scale component comprises a first measurement terminal. The measurement component comprises a second measurement terminal and a third measurement terminal. An end portion of the second measurement terminal is an arc. The end portion of the third measurement terminal is the arc which has an equal diameter with the diameter of a circle where the arc of the end portion of the second measurement terminal is located. By using the apparatus of the invention, a rapid measurement problem of the odd number of the gear with various kinds of types, large and small diameters of a spline on a production field can be solved. The apparatus and the method of the invention possess advantages that production cost is low, convenient and fast and so on. The apparatus and the method are very suitable for production and applications.

Description

Measurement mechanism and the measuring method in a kind of prototype gear footpath

Technical field

The present invention relates to a kind of measuring method and corresponding measurement mechanism thereof be used to measuring odd number gear to be measured or the large path of spline.

Background technology

Three-dimensional is three coordinate measuring machine, refer in the spatial dimension that three-dimensional can be surveyed, the point data that can return according to the gauge head system are calculated the instrument of the measurement capabilities such as all kinds of geometric configuratioies, size by the software systems of three-dimensional, be called again three-coordinates measuring machine or three-dimensional amount bed.

Now in the every profession and trade to the measurement of the large path of odd number gear, owing to can't use general measurer such as vernier caliper, outside micrometer etc. to measure, generally need to adopt three dimension coordinate measurement, and three coordinates need in special place, and measurement efficient is low, cost is higher, thereby has directly affected on-the-spot production.

Summary of the invention

Problem in view of above-mentioned prior art exists has proposed the present invention.

Therefore, the technical matters of one of them that the present invention will solve is how existing survey instrument to be improved, to reach at the scene the rapidly purpose in prototype gear footpath.

For solving the problems of the technologies described above, the invention provides following technical scheme:

The measurement mechanism in a kind of prototype gear footpath, comprise main scale parts and measurement component, described hosting parts comprise the first measuring junction, described measurement component comprises the second measuring junction and the 3rd measuring junction, the end of described the second measuring junction is circular arc, and the end of described the 3rd measuring junction is the circular arc isometrical with the circular arc place circle of the end of described the second measuring junction.

As a kind of preferred version of measurement mechanism of the present invention, wherein: described measurement component also comprises synchronizing linkage, and described the second measuring junction and the 3rd measuring junction are arranged on the mobile jib of described synchronizing linkage.

As a kind of preferred version of measurement mechanism of the present invention, wherein: be provided with screw thread on the described mobile jib, described the second measuring junction and the 3rd measuring junction end all are provided with the knob that matches with described screw thread, and described the second measuring junction and the 3rd measuring junction can move by the engagement of described knob and described screw thread.

As a kind of preferred version of measurement mechanism of the present invention, wherein: the second measuring junction in the described measurement component and the 3rd being integral of measuring junction structure, and keep at a certain distance away between described the second measuring junction and the 3rd measuring junction.

As a kind of preferred version of measurement mechanism of the present invention, wherein: described main scale parts are the vernier caliper structure.

As a kind of preferred version of measurement mechanism of the present invention, wherein: described vernier caliper structure is the digital display calliper structure.

In addition, the technical matters that the present invention further will solve is, how the method for prototype gear in the prior art improved, and can realize the Quick Measurement of production scene.

For solving the problems of the technologies described above, the invention provides following technical scheme: a kind of use is the measuring method in measurement device gear footpath as claimed in claim 1, measure its gear footpath according to following computing formula, i.e. the R value:

$R=\frac{a}{2\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="HDA0000337189570000011.png,HDA0000337189570000012.png"\; state="\{\{state\}\}">sin</figure-callout>}2\mathrm{\&alpha;}}-r;$

Wherein, α=Arctan (a/2b), a is the distance between described the second measuring junction and the 3rd measuring junction both ends, b is the distance between the round heart in circular arc place, the end horizontal line of living in of the round heart in circular arc place, the end horizontal line of living in of described the second measuring junction and described the first measuring junction, and r is circular arc place, the end radius of a circle of described the second measuring junction and the 3rd measuring junction.

As a kind of preferred version of measuring method of the present invention, wherein: measure the R value and must satisfy following pacing items:

Must satisfy static equilibrium condition dynamic balance and equalising torque on the mechanics during static lower the measurement.

The present invention utilizes the trigonometric function relation to solve the method for the direct measurement of the large path of gear, utilize the method can be in conjunction with the outside micrometer structure, thereby can directly measure, this external diameter milscale structure can be but be not limited to this structure, can also be the digital display structure.The present invention can solve the large path of all size odd number gear, spline in the problem of the Quick Measurement of production scene, has the advantages such as production cost is low, convenient and swift, extremely is suitable for production application.

Description of drawings

Fig. 1 is an embodiment synoptic diagram of the measurement mechanism in prototype gear of the present invention footpath.

Fig. 2 be embodiment illustrated in fig. 1 described in the detailed schematic of measurement component.

Fig. 3 is the synoptic diagram of prototype gear path embodiment illustrated in fig. 1.

Fig. 4 is another embodiment synoptic diagram of the measurement mechanism in prototype gear of the present invention footpath.

Fig. 5 be embodiment illustrated in fig. 4 described in the detailed schematic of measurement component.

Fig. 6 is the synoptic diagram in the large footpath of middle prototype gear embodiment illustrated in fig. 4.

Fig. 7 is the measuring method synoptic diagram.

Embodiment

The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein identical or similar label represents identical or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.

Among the figure, main scale parts 1, the first measuring junction 1a, measurement component 2, the second measuring junction 2a, the 3rd measuring junction 2b, mobile jib 2c.

As shown in Figure 1, in this embodiment, the measurement mechanism in this prototype gear footpath, it comprises main scale parts 1 and measurement component 2, and wherein, main scale parts 1 are the milscale structure, and this milscale structure is provided with the first measuring junction 1a; Referring to Fig. 2, Fig. 2 be embodiment illustrated in fig. 1 described in the detailed schematic of measurement component 2, wherein, described measurement component 2 integral body are analog-U shaped structure, described measurement component 2 comprises the second measuring junction 2a and the 3rd measuring junction 2b, the end of described the second measuring junction 2a is circular arc, and the end of described the 3rd measuring junction 2b is the circular arc isometrical with the circular arc place circle of the end of described the second measuring junction 2a.As shown in FIG., the second measuring junction 2a and the 3rd measuring junction 2b all dwindle from left to right gradually, and straight top section is circular-arc, so that measure.

In this embodiment, the second measuring junction 2a in the described measurement component 2 and the 3rd being integral of measuring junction 2b structure, and keep at a certain distance away between described the second measuring junction 2a and the 3rd measuring junction 2b, this measurement component 2 directly is set to different measuring value a, be to keep at a certain distance away between described the second measuring junction 2a and the 3rd measuring junction 2b, fixed sturcture.

As shown in Figure 3, Fig. 3 is the synoptic diagram of prototype gear path embodiment illustrated in fig. 1, in this embodiment, because measurement component 2 directly is set to the fixed sturcture of particular measurement value a, so can directly apply mechanically the size that measuring method obtains gear path R to be measured; Perhaps, in this embodiment, can come subsidiary by vernier caliper.

Such as Fig. 4～shown in Figure 6, in this embodiment, described measurement component 2 is improved, be provided with synchronizing linkage at described measurement component 2, described the second measuring junction 2a and the 3rd measuring junction 2b are arranged on the mobile jib 2c of described synchronizing linkage, and be provided with screw thread on the described mobile jib 2c, described the second measuring junction 2a and the 3rd measuring junction 2b end all are provided with the knob that matches with described screw thread, and described the second measuring junction 2a and the 3rd measuring junction 2b can move by the engagement of described knob and described screw thread.Like this, can regulate according to the size of the gear of required measurement the testing distance of then determining by the vernier caliper subsidiary.

Certainly, in this embodiment, described synchronizing linkage can directly be incorporated into vernier caliper, namely are provided with measurement component 2 on the described synchronizing linkage, so, and just can be at the measured value of directly reading gear to be measured.

Shown in Fig. 1～7, use the measurement mechanism in described prototype gear footpath, it is to utilize the trigonometric function relation that odd number tooth or the large path of spline are carried out three point measurements, physical relationship is as follows:

According to measured value a and b, can calculate tan α=a/2b, i.e. α=Arctan (a/2b)

sin2α=a/2(R+r)

Be R=a/2sin2 α-r

Can find that according to above-mentioned relation can determine a diameter of a circle at 3, i.e. known measurements a, b and r, thus can calculate the numerical value of the large path of different odd tooth.

Because the difference of modulus and modification coefficient makes different gear tooth thickness variant in the gear parameter, so measured value a changes with the variation that differs from transverse tooth thickness.So, use the servicing unit that above-mentioned relation is made above-mentioned measurement a value.In Fig. 5, the two ends screw thread is respectively and is rotated in the forward living derotation, thereby can obtain measured value a when rotary screw, and these synchronizing linkage can be independent also can be processed into one with vernier caliper or milscale.Thereby calculate the large footpath of gear or path according to above-mentioned relation.The electronic product of above-mentioned relation design specialized directly can also be inputted a, b, r, obtain the product diameter.The present invention can solve the production scene of odd number gear or the large path of odd number spline and quick and precisely measure.Measure its gear footpath according to following computing formula, i.e. the R value:

$R=\frac{a}{2\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="HDA0000337189570000011.png,HDA0000337189570000012.png"\; state="\{\{state\}\}">sin</figure-callout>}2\mathrm{\&alpha;}}-r;$

Wherein, α=Arctan (a/2b), a is the distance between described the second measuring junction 2a and the 3rd measuring junction 2b both ends, b is the distance between the round heart in circular arc place, the end horizontal line of living in of the round heart in circular arc place, the end horizontal line of living in of described the second measuring junction 2a and described the first measuring junction 1a, and r is circular arc place, the end radius of a circle of described the second measuring junction 2a and the 3rd measuring junction 2b.

When measuring, measure the R value and must satisfy following pacing items:

Must satisfy static equilibrium condition dynamic balance and equalising torque on the mechanics during static lower the measurement.

It should be noted that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (8)

1. the measurement mechanism in prototype gear footpath, comprise main scale parts (1) and measurement component (2), described main scale parts (1) comprise the first measuring junction (1a), it is characterized in that: described measurement component (2) comprises the second measuring junction (2a) and the 3rd measuring junction (2b), the end of described the second measuring junction (2a) is circular arc, and the end of described the 3rd measuring junction (2b) is the circular arc isometrical with the circular arc place circle of the end of described the second measuring junction (2a).

2. measurement mechanism as claimed in claim 1, it is characterized in that: described measurement component (2) also comprises synchronizing linkage, described the second measuring junction (2a) and the 3rd measuring junction (2b) are arranged on the mobile jib (2c) of described synchronizing linkage.

3. measurement mechanism as claimed in claim 2, it is characterized in that: be provided with screw thread on the described mobile jib (2c), described the second measuring junction (2a) and the 3rd measuring junction (2b) are terminal all to be provided with the knob that matches with described screw thread, and described the second measuring junction (2a) and the 3rd measuring junction (2b) can move by the engagement of described knob and described screw thread.

4. measurement mechanism as claimed in claim 1, it is characterized in that: the second measuring junction (2a) in the described measurement component (2) and being integral of the 3rd measuring junction (2b) structure, and keep at a certain distance away between described the second measuring junction (2a) and the 3rd measuring junction (2b).

5. measurement mechanism as claimed in claim 1 is characterized in that: described main scale parts (1) are the milscale structure.

6. measurement mechanism as claimed in claim 5, it is characterized in that: described milscale structure is the digimatic micrometer structure.

7. measuring method of using the footpath of measurement device gear as claimed in claim 1 is characterized in that: measure its gear footpath according to following computing formula, i.e. the R value:

$R=\frac{a}{2\sin 2\mathrm{\&alpha;}}-r;$

Wherein, α=Arctan (a/2b), a is the distance between described the second measuring junction (2a) and the 3rd measuring junction (2b) both ends, b is the distance between the round heart in circular arc place, the end horizontal line of living in of the round heart in circular arc place, the end horizontal line of living in of described the second measuring junction (2a) and described the first measuring junction (1a), and r is circular arc place, the end radius of a circle of described the second measuring junction (2a) and the 3rd measuring junction (2b).

8. the measuring method in gear as claimed in claim 7 footpath is characterized in that: measure the R value and must satisfy following pacing items:

Must satisfy static equilibrium condition dynamic balance and equalising torque on the mechanics during static lower the measurement.

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