Measuring tool

Abstract

The invention relates to a measuring tool, which comprises a clamp, one end of the clamp is used for being in contact with a shaft to be detected, and the clamp is provided with a first showing piece; the sleeve sleeves and is elastically connected to the other end of the fixture, and the sleeve is provided with a second showing piece; the guide rod penetrates through the sleeve and is connected with the fixture; the sliding block is connected with the end, away from the clamp, of the sleeve and elastically connected with the guide rod, and the sliding block is used for sliding parallel to the axial direction. One end of the clamp is used for contacting with a to-be-detected shaft, and the movement amount of the clamp is fed back through the first display sheet. The sleeve is provided with a second showing piece, the theoretical dimension value between the first showing piece of the clamp and the second showing piece of the sleeve is determined according to the design requirement of the shaft, the actual dimension value between the theoretical dimension value and the actual dimension value is measured, and the difference value between the theoretical dimension value and the actual dimension value is the deviation value. The measuring tool can quickly and accurately measure the axial deviation size, and can accurately measure and improve the measuring efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor product measurement, and particularly to a measuring tool. Background Art

[0002] When the shaft of a rotor-type casting product is long, it is prone to bending deformation of different degrees. For circular rotating castings composed of different cylinders with large differences in diameter and length, during the casting process, since casting itself cannot ensure that all axial dimensions do not deviate from the shaft diameter at all, it is necessary to accurately measure the axial deviation dimension of the shaft and take corrective measures to avoid quality problems in subsequent processing. The common detection method is for workers to use tools for measurement, but due to behavioral differences, the measurement accuracy is often poor. Summary of the Invention

[0003] Based on this, in view of the problem of poor measurement accuracy of the axial deviation dimension of the long shaft of rotor-type castings, it is necessary to provide a measuring tool that can accurately measure, is easy to operate, and has strong adaptability.

[0004] A measuring tool provided by the present invention includes:

[0005] A fixture, one end of the fixture is used to contact the shaft to be detected, and the fixture is provided with a first indicating piece;

[0006] A sleeve, sleeved and elastically connected to the other end of the fixture, and the sleeve is provided with a second indicating piece;

[0007] A guide rod, passing through the sleeve and connected to the fixture;

[0008] A slider, connected to the end of the sleeve away from the fixture and elastically connected to the guide rod, and the slider is used for sliding parallel to the axial direction.

[0009] In one embodiment, the measuring tool further includes a guide rail, the guide rail is provided with a chute, the guide rail is arranged along the axial direction parallel to the shaft to be detected, and the slider is connected to the chute.

[0010] In one embodiment, the cross-section of the chute has a vacancy close to a T shape, and the slider includes a mating portion that matches the chute.

[0011] In one embodiment, the measuring tool further includes a mounting member, the mounting member includes a sliding connection portion and an annular structure, the sliding connection portion is connected to the chute, and the annular structure is used to connect the shaft to be detected.

[0012] In one embodiment, the fixture further includes a contact portion and a connecting rod. The contact portion is provided with an arc surface for contacting the shaft to be detected. The first indicating piece is connected to the side of the contact portion facing away from the shaft to be detected. One end of the connecting rod is connected to the contact portion, and the other end of the connecting rod passes through the sleeve and is connected to the guide rod.

[0013] In one embodiment, the guide rod includes a first rod section, a limiting portion, and a second rod section. The first rod section is connected to the fixture. The limiting portion is arranged between the first rod section and the second rod section. The second rod section passes through the slider. The measuring tool further includes a first spring, and the first spring is sleeved on the connecting portion of the first rod section and the fixture.

[0014] In one embodiment, the slider further includes an engaging portion. The engaging portion is provided with a stepped hole. The guide rod passes through the stepped hole. The measuring device further includes a second spring. The second spring is sleeved on the guide rod and abuts against the stepped hole. The stepped hole is provided with a moving space for the guide rod to move linearly.

[0015] For the above-mentioned measuring tool, one end of the fixture is used to contact the shaft to be detected, and the movement amount of the fixture is fed back through the first indicating piece. By sleeving and elastically connecting the sleeve to the other end of the fixture, and passing the guide rod through the sleeve and connecting it to the fixture, an elastic connection between the fixture and the guide rod and the sleeve is achieved. By connecting the slider to the end of the sleeve away from the fixture and elastically connecting it to the guide rod, an elastic connection between the guide rod and the fixture and the slider is achieved. The sleeve is provided with a second indicating piece. According to the design requirements of the shaft, the theoretical dimension value between the first indicating piece of the fixture and the second indicating piece of the sleeve is determined, and the actual dimension value between the two is measured. The difference between the theoretical dimension value and the actual dimension value is the offset value. If the offset value is greater than 0, the shaft is upwardly offset; if the offset value is less than 0, the shaft is downwardly offset. The slider is used to slide parallel to the axial direction. By driving the guide rod, the sleeve, and the fixture to slide along the axial direction of the shaft to be detected together through the slider, the axial deviation dimensions at different positions of the shaft section can be detected. With this measuring tool, the axial shaft deviation dimensions can be measured quickly and accurately, and the measurement accuracy can be improved and the measurement efficiency can be increased. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the measuring tool in one embodiment;

[0017] Figure 2 It is a first sectional view of the measuring tool in one embodiment;

[0018] Figure 3 It is a second sectional view of the measuring tool in one embodiment;

[0019] Figure 4Schematic diagram of the working state of a measuring tool in an embodiment;

[0020] Figure 5 Structure diagram of the fixture of a measuring tool in an embodiment;

[0021] Figure 6 Structure diagram of the sleeve of a measuring tool in an embodiment;

[0022] Figure 7 Structure diagram of the guide rod of a measuring tool in an embodiment;

[0023] Figure 8 Structure diagram of the slider of a measuring tool in an embodiment;

[0024] Figure 9 Cross-sectional view of the slider of a measuring tool in an embodiment;

[0025] Figure 10 Structure diagram of the guide rail of a measuring tool in an embodiment;

[0026] Figure 11 Structure diagram of the mounting part of a measuring tool in an embodiment.

[0027] Label description:

[0028] 100, measuring tool; 200, guide rail; 300, mounting part; A, shaft;

[0029] 1, fixture; 2, sleeve; 3, guide rod; 4, first spring; 5, second spring; 6, slider;

[0030] 11, contact part; 12, connecting rod; 13, pin hole; 14, first indicating piece;

[0031] 21, cylinder body; 22, second indicating piece;

[0032] 31, first rod segment; 32, limiting part; 33, second rod segment;

[0033] 61, connecting part; 62, mating part. Specific embodiments

[0034] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the specific embodiments of the present invention in detail with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0037] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0039] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0040] Referring to Figures 1-6 , a measuring tool provided by an embodiment of the present invention includes a fixture, a sleeve, a guide rod and a slider. One end of the fixture is used to contact the shaft to be detected, and the fixture is provided with a first indicating piece; the sleeve is sleeved and elastically connected to the other end of the fixture, and the sleeve is provided with a second indicating piece; the guide rod is inserted through the sleeve and connected to the fixture; the slider is connected to the end of the sleeve away from the fixture and elastically connected to the guide rod, and the slider is used for sliding parallel to the axial direction. For this measuring tool 100, one end of the fixture 1 is used to contact the shaft A to be detected, and the movement amount of the fixture 1 is fed back through the first indicating piece 14. By sleeving and elastically connecting the sleeve 2 to the other end of the fixture 1 and inserting the guide rod 3 through the sleeve 2 and connecting it to the fixture 1, the elastic connection between the fixture 1 and the guide rod 3 and the sleeve 2 is realized. By connecting the slider 6 to the end of the sleeve 2 away from the fixture 1 and elastically connecting it to the guide rod 3, the elastic connection between the guide rod 3 and the fixture 1 and the slider 6 is realized. The sleeve 2 is provided with a second indicating piece 22. According to the design requirements of the shaft, the theoretical dimension value between the first indicating piece 14 of the fixture 1 and the second indicating piece 22 of the sleeve 2 is determined. By measuring the actual dimension value between the two, the difference between the theoretical dimension value and the actual dimension value is the offset value. If the offset value is greater than 0, the shaft is upwardly offset; if the offset value is less than 0, the shaft is downwardly offset. After one measurement, the shaft A can be rotated by a certain angle in place for re-measurement. The slider 6 is used for sliding parallel to the axial direction. By driving the guide rod 3, the sleeve 2 and the fixture 1 to slide along the axial direction of the shaft A to be detected together through the slider 6, the axial deviation dimensions at different positions of the shaft section can be detected. Through this measuring tool, the axial shaft deviation dimension can be measured quickly and accurately, and the measurement can be accurately carried out and the measurement efficiency can be improved.

[0041] As Figure 1 , Figure 3 , Figure 5 and Figure 6 shown, optionally, the second indicating piece 22 is arranged on the side of the cylinder body 21 of the sleeve 2 and is opposite to the position of the first indicating piece 14 of the fixture 1 for easy measurement.

[0042] As Figure 1 , Figure 4 , Figure 10As shown, optionally, in order to facilitate the measurement of the axial deviation dimensions at different positions on the same axis, in one embodiment, the measuring tool 100 further includes a guide rail 200. The guide rail 200 is provided with a chute, and the guide rail 200 is arranged along the axial direction parallel to the axis A to be detected. The slider 6 is connected to the chute. The cooperation between the guide rail 200 and the slider 6 enables the measuring tool 100 to slide along the axial direction of the axis A to be detected, so as to quickly detect the axial deviation dimensions at different positions of the shaft section, improve the detection efficiency, and shorten the detection process.

[0043] As Figure 4 , Figure 9 and Figure 10 As shown, optionally, in order to ensure the smoothness and stability of the sliding, in one embodiment, the cross-section of the chute has a vacancy close to a T-shape, and the slider 6 includes a mating portion 62, and the mating portion 62 matches the chute.

[0044] As Figure 4 , Figure 11 As shown, optionally, in order to facilitate the installation and rotation of the axis A to be detected, in one embodiment, the measuring tool 100 further includes a mounting member 300. The mounting member 300 includes a sliding connection portion and an annular structure. The sliding connection portion is connected to the chute, and the annular structure is used to connect the axis A to be detected, so as to connect the axis A to be detected on the guide rail 200. Optionally, there is a clearance fit between the annular structure and the shaft, which enables the shaft to rotate relative to the mounting member 300, so that after one measurement, the axis A can be rotated by a certain angle in place for re-measurement, improving the detection accuracy.

[0045] As Figures 1-3 , Figure 4 , Figure 5 As shown, optionally, in one embodiment, the fixture 1 further includes a contact portion 11 and a connecting rod 12. The contact portion 11 is provided with an arc surface for contacting the axis A to be detected. The first indicating piece 14 is connected to the side of the contact portion 11 facing away from the axis A to be detected. One end of the connecting rod 12 is connected to the contact portion 11, and the other end of the connecting rod 12 passes through the sleeve 2 and is connected to the guide rod 3, realizing the elastic connection between the guide rod 3 and the fixture 1 and the sleeve 2. The axial offset amount is magnified and displayed by the first indicating piece 14, and at the same time, enough operating space is provided for easy measurement.

[0046] As Figures 1-7As shown, optionally, in order to facilitate the installation and connection between the fixture 1, the guide rod 3 and the sleeve 2, in one embodiment, the guide rod 3 includes a first rod segment 31, a limiting portion 32 and a second rod segment 33, the first rod segment 31 is connected to the fixture 1, the limiting portion 32 is arranged between the first rod segment 31 and the second rod segment 33, and the limiting portion 32 is used to prevent the guide rod 3 and the fixture 1 from being separated from the cylinder 21 of the sleeve 2. The second rod segment 33 is penetrated by the slider 6, and the measuring tool 100 also includes a first spring 4, which is sleeved on the connecting part of the first rod segment 31 and the fixture 1 to realize the elastic connection between the guide rod 3 and the fixture 1 and the sleeve 2.

[0047] Furthermore, a pin hole 13 is provided on the connecting rod 12 of the clamp 1 , and the connecting rod 12 is connected to the first rod section 31 of the guide rod 3 via a connecting pin.

[0048] Furthermore, if Figures 1-9 As shown, in one embodiment, the slider 6 also includes a connecting portion 61, the connecting portion 61 is provided with a step hole, the guide rod 3 is passed through the step hole, and the measuring device also includes a second spring 5, the second spring 5 is sleeved on the guide rod 3 and abuts against the step hole, and the step hole is provided with a movable space for the guide rod 3 to move linearly, thereby realizing an elastic connection between the guide rod 3, the fixture 1 and the slider 6.

[0049] In the above-mentioned measuring tool 100, one end of the fixture 1 is used to contact the shaft A to be tested, and the movement amount of the fixture 1 is fed back through the first indicator piece 14. By sleeve-mounting and elastically connecting the sleeve 2 to the other end of the fixture 1, and passing the guide rod 3 through the sleeve 2 and connecting it to the fixture 1, an elastic connection between the fixture 1 and the guide rod 3 and the sleeve 2 is achieved. By connecting the slider 6 to the end of the sleeve 2 away from the fixture 1 and elastically connecting it to the guide rod 3, an elastic connection between the guide rod 3 and the fixture 1 and the slider 6 is achieved. The sleeve 2 is provided with a second indicator piece 22. The theoretical size value between the first indicator piece 14 of the fixture 1 and the second indicator piece 22 of the sleeve 2 is determined according to the design requirements of the shaft, and the actual size value between the two is measured. The difference between the theoretical size value and the actual size value is the offset value. If the offset value is greater than 0, the axis is deflected upward, and if the offset value is less than 0, the axis is deflected downward. The slider 6 is used to slide parallel to the axial direction, and the slider 6 drives the guide rod 3, the sleeve 2 and the fixture 1 to slide axially along the axis A to be detected, so as to detect the axial deviation dimensions at different positions of the axis segment. The measuring tool 100 can quickly and accurately measure the axial axis deviation dimension, and can accurately measure and improve the measurement efficiency.

[0050] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0051] The above-described embodiments only express several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A measuring tool, characterized in that: The measuring tools include: A fixture, one end of which is used to contact the shaft to be tested, and the fixture is provided with a first indicator sheet; A sleeve, which is sleeved and elastically connected to the other end of the fixture, and the sleeve is provided with a second indicator sheet; A guide rod, passing through the sleeve and connected to the fixture; A sliding block is connected to an end of the sleeve away from the clamp and is elastically connected to the guide rod. The sliding block is used for sliding parallel to the axial direction.

2. The measuring tool according to claim 1, characterized in that: It also includes a guide rail, which is provided with a slide groove. The guide rail is arranged along an axial direction parallel to the axis to be detected, and the sliding block is connected to the slide groove.

3. The measuring tool according to claim 2, characterized in that: The cross section of the slide groove has a nearly T-shaped gap, and the sliding block includes a matching portion, which matches the slide groove.

4. The measuring tool according to claim 2, characterized in that: It also includes a mounting piece, which includes a sliding connection part and an annular structure. The sliding connection part is connected to the sliding groove, and the annular structure is used to connect the shaft to be detected.

5. The measuring tool according to claim 1, characterized in that: The fixture also includes a contact portion and a connecting rod, the contact portion is provided with an arc surface for contacting the axis to be detected, the first indicator piece is connected to the side of the contact portion away from the axis to be detected, one end of the connecting rod is connected to the contact portion, and the other end of the connecting rod is passed through the sleeve and connected to the guide rod.

6. The measuring tool according to claim 1, characterized in that: The guide rod includes a first rod segment, a limiting portion and a second rod segment, the first rod segment is connected to the fixture, the limiting portion is arranged between the first rod segment and the second rod segment, the second rod segment is passed through the slider, and the measuring tool also includes a first spring, and the first spring is sleeved on the connecting part of the first rod segment and the fixture.

7. The measuring tool according to claim 1, characterized in that: The slider also includes a connecting portion, which is provided with a step hole, and the guide rod is inserted into the step hole. The measuring device also includes a second spring, which is sleeved on the guide rod and abuts against the step hole. The step hole is provided with a movable space for the guide rod to move linearly.

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