CN220772067U - Gauge - Google Patents

Abstract

The utility model belongs to the technical field of size detection, and discloses a gauge. The gauge is used for detecting a first size and a second size of the static contact. The base is provided with a positioning table and two positioning pins arranged on the positioning table, the positioning pins are used for being inserted into holes to be measured, and the positioning table is used for being attached to the first end face; the first positioning block is arranged on the base and is inserted with a first positioning rod, the first positioning rod comprises a first stop end and a first through end connected with the first stop end, the first through end is used for keeping a preset distance with the second end face, and the first stop end is used for abutting against the fixed contact; the second locating block is opposite to the first locating block and is arranged on the base, the second locating block is inserted with a second locating rod, the second locating rod comprises a second stop end and a second through end connected with the second stop end, the second through end is used for keeping a preset distance with the third end face, and the second stop end is used for being abutted against the fixed contact. By the method and the device, the critical dimension of the static contact can be detected, and the efficiency and accuracy of dimension detection are improved.

Description

Gauge

Technical Field

The utility model relates to the technical field of size detection, in particular to a gauge.

Background

The size of the part accords with the basic requirement of the part processing process, and only if the processing size of the part is in a qualified range, the assembled product can obtain good service performance and normal service life.

The static contact is a key part in a circuit breaker product, the quality and the size of parts of the static contact directly influence the service performance of the circuit breaker product, the existing size detection is carried out by adopting an image measuring instrument, the image measuring instrument consists of a camera, a workbench, a software computer and the like, and the working principle is that a measured workpiece is illuminated by contour light and then is shot into images through a zoom lens, and aiming measurement is carried out on the measured workpiece through special software.

The size of the fixed contact is complex, the conventional vernier caliper cannot detect, but the detection and measurement efficiency is low by adopting an image measuring instrument, and different detection personnel have different skill levels and operation habits; the detection has a difference, and a certain dispute exists on the detection data.

Disclosure of Invention

The utility model aims to provide a gauge which is used for detecting the key size of a fixed contact and improving the efficiency and accuracy of size detection.

To achieve the purpose, the utility model adopts the following technical scheme:

the gauge is used for detecting a first size and a second size of the fixed contact, the first size is a space distance between a first end face and a second end face of the fixed contact, the second size is a space distance between a center of a hole to be detected of the fixed contact and a third end face, and the gauge comprises:

the base is provided with a positioning table and two positioning pins arranged on the positioning table, the positioning pins are used for being inserted into the holes to be tested, and the positioning table is used for being attached to the first end face;

the first positioning block is arranged on the base and is inserted with a first positioning rod, the first positioning rod comprises a first stop end and a first through end connected with the first stop end, the first through end is used for keeping a preset distance with the second end face, and the first stop end is used for abutting against the fixed contact;

the second locating block is opposite to the first locating block and arranged on the base, a second locating rod is inserted into the second locating block, the second locating rod comprises a second stop end and a second through end connected with the second stop end, the second through end is used for keeping a preset distance with the third end face, and the second stop end is used for being abutted to the fixed contact.

As an alternative of the gauge, the first stop end includes a first abutment surface, the first abutment surface is configured to abut against the fixed contact, the second stop end includes a second abutment surface, the second abutment surface is configured to abut against the fixed contact, the first abutment surface is perpendicular to the second end surface, and the second abutment surface is perpendicular to the third end surface.

As an alternative scheme of examining tool, be equipped with the locating hole on the locating bench and dodge the hole, the locating pin inserts and locates the locating hole, the locating pin wears to locate dodge the hole, dodge the hole with be connected with each other between the locating hole in order to form the shoulder hole.

As an alternative scheme of examining tool, the stationary contact is including the bud flange, be equipped with the spacing groove on the locating bench, the shape of spacing groove with the shape of bud flange suits, the bud flange can be placed in the spacing inslot.

As an alternative scheme of examining tool, first end is equipped with first lug for one side of first end, be equipped with first introduction hole on the first locating piece, first end inserts and locates first introduction hole, the size of first lug is greater than the size of first introduction hole.

As an alternative of the gauge, the first introduction hole is a rectangular hole, and first grooves are formed in four top corners of the rectangular hole, and extend along the direction in which the first positioning rod is inserted.

As an alternative scheme of examining tool, the second end stop is equipped with the second lug for one side of second through-going end, be equipped with the second introduction hole on the second locating piece, the second end stop inserts and locates the second introduction hole, the size of second lug is greater than the size of second introduction hole.

As an alternative of the gauge, the second introduction hole is a rectangular hole, and the four top corners of the rectangular hole are provided with second grooves, and the second grooves extend along the direction in which the second positioning rod is inserted.

As an alternative scheme of the gauge, two limiting blocks which are oppositely arranged are arranged on the base, and the connecting plate of the fixed contact is clamped between the two limiting blocks.

As an alternative scheme of examining tool, be equipped with on the base and dodge the groove, the striking angle of static contact is located keeping away from the one end of the contact of static contact and stretches out the part of link plate is arranged in dodge the groove.

The beneficial effects are that:

in the utility model, the base is used for supporting other parts on the gauge, and the positioning table is a cuboid which is convexly arranged on the top surface of the base. The positioning table is convexly provided with two positioning pins for positioning a hole shaft with a hole to be detected of the fixed contact, when the detection tool detects the first size and the second size of the fixed contact, the hole to be detected of the fixed contact is matched with the two positioning pins in a hole shaft positioning way, and at the moment, the first end face is attached to the positioning table to finish positioning of the first end face; then the first positioning rod passes through the first positioning block, in the penetrating process, the first through end and the second end face keep a preset distance, the first size detected is smaller than the upper limit value, the first stop end is abutted against the fixed contact, the first size detected is larger than the lower limit value, the first size is in a qualified range, the detection is qualified, and otherwise, the detection result is unqualified; similarly, the second positioning rod penetrates into the second positioning block, in the penetrating process, the second through end and the third end face keep a preset distance, the second size detected is larger than the lower limit value, the second stop end abuts against the fixed contact, the second size detected is smaller than the upper limit value, the second size is in a qualified range, the detection is qualified, and otherwise, the detection result is unqualified; in this gauge, through the size of accurate control and accurate processing out the locating pin to and the relative spatial position size of locating pin and second locating lever, guarantee to examine the gauge and to the accurate measurement of second size, through the size of accurate control and accurate processing out the locating bench and the relative spatial position size of locating bench for first locating lever, guarantee to examine the gauge and to the accurate measurement of first size, this gauge has effectively promoted the detection efficiency and the accuracy to two critical dimensions of static contact.

Drawings

Fig. 1 is a schematic structural diagram of a stationary contact according to an embodiment of the present utility model;

fig. 2 is a front view of a stationary contact provided in an embodiment of the present utility model;

fig. 3 is a top view of a stationary contact provided by an embodiment of the present utility model;

FIG. 4 is a schematic structural diagram of a gauge according to an embodiment of the present utility model;

FIG. 5 is a schematic structural diagram of a tool for hiding a positioning pin according to an embodiment of the present utility model;

FIG. 6 is a schematic structural view of a first positioning rod according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a second positioning rod according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a first positioning block according to an embodiment of the present utility model;

fig. 9 is a schematic structural view of a second positioning block according to an embodiment of the present utility model;

FIG. 10 is a schematic view of a base according to an embodiment of the present utility model;

fig. 11 is a schematic structural view of a positioning pin according to an embodiment of the present utility model.

In the figure:

A. a first dimension; B. a second dimension;

1. a stationary contact; 101. a coupling plate; 102. a contact; 103. arc striking angles; 11. a first end face; 12. a second end face; 13. a hole to be measured; 14. a third end face; 15. a bud extraction flange;

100. a base; 110. a first positioning groove; 120. a second positioning groove; 130. a limiting block; 140. an avoidance groove;

200. a positioning table; 210. positioning holes; 220. avoidance holes; 230. a limit groove;

300. a positioning pin;

400. a first positioning block; 410. a first positioning rod; 411. a first end stop; 4110. a first abutment surface; 412. a first end; 413. a first bump; 420. a first introduction hole; 421. a first groove;

500. a second positioning block; 510. a second positioning rod; 511. a second end stop; 5110. a second abutment surface; 512. a second end; 513. a second bump; 520. a second introduction hole; 521. a second groove.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Referring to fig. 1-3, in the present embodiment, a first dimension a and a second dimension B are critical dimensions of the stationary contact 1, where the first dimension a is a spatial distance between the first end face 11 and the second end face 12, and the second dimension B is a spatial distance between a center of the hole 13 to be measured and the third end face 14. Because the two dimensions above the fixed contact 1 are relative dimensions in space, the conventional vernier caliper cannot detect the fixed contact; however, when the image measuring instrument is used for detection, the detection efficiency is low, and different detection personnel have different skill levels and operation habits, and the detection accuracy is different.

The gauge according to the embodiment can perform qualification detection of a first size a and a second size B for a fixed contact 1 shown in fig. 1-3, wherein the fixed contact 1 comprises a connecting plate 101, a contact 102 and an arc striking angle 103; in order to ensure the performance of the low-voltage electrical apparatus, it is necessary to ensure that the first dimension a and the second dimension B of the fixed contact 1 are acceptable, in some embodiments, the first dimension a is a spatial distance between a lower end face (the second end face 12) of one end of the connection plate 101 of the fixed contact 1 and a lower end face (the first end face 11) of the other end of the connection plate 101, and the second dimension B is a spatial distance between a center of the hole 13 to be measured of the fixed contact 1 and one side end face (the third end face 14) of the connection plate 101, which is close to the contact 102.

The gauge of the embodiment can detect the first dimension A and the second dimension B at the same time, and the static contact 1 which is detected by the gauge and is qualified by the first dimension A and the second dimension B is judged to be a qualified component; and if any one of the detected first dimension A and the detected second dimension B fails to pass the fixed contact 1, judging that the fixed contact is a failed component, and removing or repairing again.

Referring to fig. 4, the gauge includes a base 100, a first positioning block 400 and a second positioning block 500. The base 100 is provided with a positioning table 200 and two positioning pins 300 arranged on the positioning table 200, wherein the positioning pins 300 are used for being inserted into holes 13 to be measured, and the positioning table 200 is used for being attached to the first end face 11; the first positioning block 400 is arranged on the base 100, the first positioning block 400 is inserted with a first positioning rod 410, the first positioning rod 410 comprises a first stop end 411 and a first through end 412 connected with the first stop end 411, the first through end 412 is used for keeping a preset distance with the second end face 12, and the first stop end 411 is used for abutting against the fixed contact 1; the second positioning block 500 is opposite to the first positioning block 400 and is arranged on the base 100, the second positioning block 500 is inserted with a second positioning rod 510, the second positioning rod 510 comprises a second stop end 511 and a second through end 512 connected with the second stop end 511, the second through end 512 is used for keeping a preset distance with the third end surface 14, and the second stop end 511 is used for abutting against the fixed contact 1.

In some embodiments, the base 100 is a cuboid metal piece for supporting other parts on the testing tool, the positioning table 200 is a cuboid protruding on the top surface of the base 100, and the positioning table 200 may be integrally formed with the base 100 or may be connected by welding or other manners. The positioning table 200 is convexly provided with two positioning pins 300 for positioning the hole shaft with the hole 13 to be measured of the fixed contact 1.

The gauge can detect the first dimension A of the fixed contact 1, and the standard dimension A is (5.5+/-0.2) mm, the lower limit value is 5.3mm and the upper limit value is 5.7mm. During operation, firstly, the hole 13 to be detected of the fixed contact 1 is matched with the two positioning pins 300 in a hole shaft positioning way, and at the moment, the first end face 11 is attached to the positioning table 200, so that the positioning of the first end face 11 is completed; the first positioning rod 410 is then passed through the first positioning block 400, and during the passing, when the first through end 412 is maintained at a preset distance from the second end face 12, it is indicated that the detected first dimension a is less than the upper limit value of 5.7mm. The preset distance here includes two cases, that is, the preset distance is greater than 0 and equal to 0, and when the preset distance is greater than 0, a certain gap is maintained between the first through end 412 and the second end face 12; when the preset distance is equal to 0, the first through end 412 is attached to the second end face 12; in the penetrating process, when the first stop end 411 abuts against the fixed contact 1, the first size A detected is larger than the lower limit value by 5.3mm, and the detection result of the first size A is qualified. When the first through end 412 is abutted with the fixed contact 1, the first size a is smaller than the lower limit value of 5.3mm, the first size a is out of tolerance, the detection result is failed, or the first end 411 and the second end face 12 keep a preset distance, the first size a is larger than the upper limit value of 5.7mm, the first size a is out of tolerance, and the detection result is also failed.

The gauge can detect the second dimension B of the stationary contact 1, and the standard dimension B is (21±0.2) mm, the lower limit value is 20.8mm, and the upper limit value is 21.2mm, for example. In operation, the second positioning rod 510 is inserted into the second positioning block 500, and when the second through end 512 and the third end face 14 keep a preset distance (the two preset distances are the same as above, and are not described in detail), the second dimension B is larger than the lower limit value 20.8mm; during the continuous penetration process, when the second stop end 511 abuts against the fixed contact 1, the second dimension B is smaller than the upper limit value of 21.2mm; and the detection result of the second dimension B is qualified. Similarly, when the second through end 512 abuts against the fixed contact 1, the second dimension B is smaller than the lower limit value of 20.8mm, the second dimension B is out of tolerance, and the detection result is not qualified; or when the second end 511 and the third end surface 14 keep a preset distance, the second dimension B is larger than the upper limit value of 21.2mm, the second dimension B is out of tolerance, and the detection result is not qualified.

In the present gauge, the accurate detection of the second dimension B by the gauge is ensured by accurately controlling and accurately machining the dimension of the positioning pin 300 and the relative spatial position dimension of the positioning pin 300 and the second positioning rod 510, and the accurate detection of the first dimension a by accurately controlling and accurately machining the dimension of the positioning table 200 and the relative spatial position dimension of the positioning table 200 with respect to the first positioning rod 410.

Referring to fig. 5, optionally, a positioning hole 210 and a avoiding hole 220 are provided on the positioning table 200, the positioning pin 300 is inserted into the positioning hole 210, the positioning pin 300 is inserted into the avoiding hole 220, and the avoiding hole 220 and the positioning hole 210 are connected to each other to form a stepped hole.

In some embodiments, two positioning holes 210 are provided on the positioning table 200, and two positioning pins 300 are respectively fixed in the two positioning holes 210. The two positioning pins 300 are respectively inserted into the two positioning holes 210 and are in interference fit with the positioning holes 210, in order to ensure the accuracy of detection, the positions of the positioning holes 210 need to ensure higher design accuracy and manufacturing accuracy, and the accurate positional relationship of the positioning pins 300 relative to the second positioning rod 510 can be ensured by accurately designing and processing the structure of the positioning holes 210 and accurately ensuring the relative positions of the positioning holes 210, so that the accurate detection of the second dimension B by the detection tool is ensured.

Further, the size of the avoidance hole 220 should be larger than the size of the hole 13 to be measured, so as to accommodate burrs around the hole 13 to be measured of the fixed contact 1, and prevent the first end face 11 from being unable to be completely attached to the top surface of the positioning table 200 due to the burrs, thereby realizing accurate attachment and limitation of the first end face 11.

Optionally, the static contact 1 further includes a sprouting flange 15, the positioning table 200 is provided with a limiting groove 230, the shape of the limiting groove 230 is adapted to the shape of the sprouting flange 15, and the sprouting flange 15 is disposed in the limiting groove 230.

In fact, the fixed contact 1 is further provided with a downwardly extending sprouting flange 15 at a position close to the hole 13 to be measured, the sprouting flange 15 is formed by punching a through hole in the connecting plate 101 and by a sprouting process, and after the sprouting flange 15 is processed, an internal thread is processed on the inner wall for screwing the connecting plate 101 on other parts. In some embodiments, when the hole 13 to be tested is matched with the positioning pin 300, the sprouting flange 15 is just buried in the limiting groove 230, the limiting groove 230 effectively avoids the sprouting flange 15, so that the positioning table 200 is completely attached to the first end face 11, the shape of the limiting groove 230 is adapted to the shape of the sprouting flange 15 of the fixed contact 1, and if the sprouting flange 15 is cylindrical, the limiting groove 230 should also be a cylindrical groove.

Referring to fig. 6 and 8, alternatively, the first end 411 and the first end 412 are rectangular, and the first end 411 and the first end 412 form a step structure. The first end 411 is provided with a first bump 413 on one side opposite to the first end 412, the first positioning block 400 is provided with a first insertion hole 420, the first end 411 is inserted into the first insertion hole 420, and the size of the first bump 413 is larger than that of the first insertion hole 420.

In some embodiments, the first end 411 and the first end 412 are rectangular, and both form a step structure, and the first end 411 is provided with a first bump 413 opposite to one side of the first end 412, the detection surface of the first end 412 is a plane, and when the gauge detects, an operator holds the first bump 413 by hand, inserts the first introduction hole 420 from the outside of the first positioning block 400, and makes the first end 412 fit or opposite to the second end 12. The first protrusion 413 has a cross-sectional area larger than that of the first stop 411 in a cross-section perpendicular to the insertion direction, so that an operator can be prevented from operating the first positioning rod 410 completely inserted into the first introduction hole 420.

Optionally, the first stop end 411 includes a first abutment surface 4110, where the first abutment surface 4110 is configured to abut against the stationary contact 1, and the first abutment surface 4110 is perpendicular to the second end surface 12.

In some embodiments, the surface of the first abutting surface 4110 is planar, the first end 411 and the first end 412 are in a step structure, one side of the first end 411 is connected to the first end 411, the other side of the first end 412 is connected to the first abutting surface 4110, and the first abutting surface 4110 is perpendicular to the second end 12, and when detecting, the first abutting surface 4110 can completely abut against the side wall of the connecting plate 101, so that it can be verified that the first dimension a is greater than the lower limit value.

Referring to fig. 7 and 9, optionally, the second end 511 and the second end 512 are rectangular, and the second end 511 and the second end 512 form a stepped structure. The second end 511 is provided with a second bump 513 on a side opposite to the second through end 512, the second positioning block 500 is provided with a second insertion hole 520, the second end 511 is inserted into the second insertion hole 520, and the size of the second bump 513 is larger than that of the second insertion hole 520.

In some embodiments, the second stop end 511 and the second bump 513 are both rectangular, and form a stepped structure, the second stop end 511 is provided with the second bump 513 on one side opposite to the second through end 512, the detection surface of the second through end 512 is also a plane, and when the detection tool detects, an operator holds the second bump 513 by hand, inserts the second introduction hole 520 from the outside of the second positioning block 500, and makes the second through end 512 fit or opposite to the third end surface 14. The second projection 513 has an area larger than that of the second stopper 511 on a cross section perpendicular to the insertion direction, so that the second positioning rod 510 can be prevented from being erroneously operated by the operator, thereby causing the second positioning rod 510 to be completely inserted into the second introduction hole 520.

Optionally, the second stop end 511 includes a second abutment surface 5110, where the second abutment surface 5110 is configured to abut against the stationary contact 1, and the second abutment surface 5110 is perpendicular to the third end surface 14.

In some embodiments, the surface of the second abutment surface 5110 is planar, one side of the second abutment surface 5110 is connected to the second end 511, and the other side of the second abutment surface 5110 is connected to the second end 512, and when the second abutment surface 5110 is perpendicular to the third end 14 during detection, the second abutment surface 5110 can abut against the sidewall of the connecting plate 101 during detection, so that it can be verified that the second dimension B is greater than the lower limit value.

Referring to fig. 8, alternatively, the first introduction hole 420 is a rectangular hole, and four corners of the rectangular hole are provided with first grooves 421, and the first grooves 421 extend along the direction in which the first positioning rod 410 is inserted.

Referring to fig. 9, alternatively, the second introduction hole 520 is a rectangular hole, and four corners of the rectangular hole are provided with second grooves 521, the second grooves 521 extending along the direction in which the second positioning rod 510 is inserted.

In some embodiments, the first groove 421 and the second groove 521 are arc-shaped grooves, which can effectively avoid stress concentration of the first positioning block 400 and the second positioning block 500, and reduce the service lives of the first positioning block 400 and the second positioning block 500 when frequent inspection is used.

Referring to fig. 10, a base 100 is provided with a first positioning slot 110 and a second positioning slot 120; the first positioning block 400 and the second positioning block 500 are respectively disposed in the first positioning groove 110 and the second positioning groove 120, and are respectively screwed with the base 100.

Optionally, two limiting blocks 130 are arranged on the base 100 in an opposite manner, and the connecting plate 101 of the fixed contact 1 is clamped between the two limiting blocks 130. The stationary contact 1 is restrained in the width direction of the coupling plate 101 by two stoppers 130.

Further, the base 100 is provided with a dodging groove 140, and a portion of the arc striking angle 103 of the fixed contact 1, which is located at one end far away from the contact 102 of the fixed contact 1 and extends out of the connecting plate 101, is placed in the dodging groove 140. The arc striking angle 103 is riveted on the connecting plate 101, one end of the arc striking angle 103 extends out of the connecting plate 101 on the bottom surface of the connecting plate 101, and the part is arranged in the avoidance groove 140, so that the connecting plate 101 can be completely attached to the surface of the base 100, and the whole static contact 1 can complete alignment of a reference surface before measurement.

Referring to fig. 11, in some embodiments, the top of the positioning pin 300 is provided with a conical surface, so that the hole 13 to be detected is conveniently introduced during detection, and the detection tool is more accurate in detecting the size of the fixed contact 1.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The detection tool is used for detecting a first size (A) and a second size (B) of a fixed contact (1), wherein the first size (A) is a space distance between a first end face (11) and a second end face (12) of the fixed contact (1), and the second size (B) is a space distance between the center of a hole (13) to be detected of the fixed contact (1) and a third end face (14), and is characterized in that the detection tool comprises:

the base (100), the base (100) is provided with a positioning table (200) and two positioning pins (300) arranged on the positioning table (200), the positioning pins (300) are used for being inserted into the holes (13) to be tested, and the positioning table (200) is used for being attached to the first end face (11);

the first positioning block (400) is arranged on the base (100), a first positioning rod (410) is inserted into the first positioning block (400), the first positioning rod (410) comprises a first stop end (411) and a first through end (412) connected with the first stop end (411), the first through end (412) is used for keeping a preset distance from the second end face (12), and the first stop end (411) is used for abutting against the fixed contact (1);

the second locating block (500) is opposite to the first locating block (400) and is arranged on the base (100), a second locating rod (510) is inserted into the second locating block (500), the second locating rod (510) comprises a second stop end (511) and a second through end (512) connected with the second stop end (511), the second through end (512) is used for keeping a preset distance with the third end face (14), and the second stop end (511) is used for being abutted to the fixed contact (1).

2. The gauge according to claim 1, wherein the first stop end (411) comprises a first abutment surface (4110), the first abutment surface (4110) is configured to abut against the stationary contact (1), the second stop end (511) comprises a second abutment surface (5110), the second abutment surface (5110) is configured to abut against the stationary contact (1), the first abutment surface (4110) is perpendicular to the second end surface (12), and the second abutment surface (5110) is perpendicular to the third end surface (14).

3. The gauge according to claim 1, wherein the positioning table (200) is provided with a positioning hole (210) and an avoidance hole (220), the positioning pin (300) is inserted into the positioning hole (210), the positioning pin (300) is inserted into the avoidance hole (220), and the avoidance hole (220) and the positioning hole (210) are connected to each other to form a stepped hole.

4. The gauge according to claim 1, wherein the stationary contact (1) comprises a sprouting flange (15), the positioning table (200) is provided with a limiting groove (230), the shape of the limiting groove (230) is adapted to the shape of the sprouting flange (15), and the sprouting flange (15) can be placed in the limiting groove (230).

5. The gauge according to claim 1, wherein a first bump (413) is disposed on a side of the first end stop (411) opposite to the first end stop (412), a first insertion hole (420) is disposed on the first positioning block (400), the first end stop (411) is inserted into the first insertion hole (420), and a size of the first bump (413) is larger than a size of the first insertion hole (420).

6. The gauge according to claim 5, wherein the first introduction hole (420) is a rectangular hole, and four top corners of the rectangular hole are provided with first grooves (421), and the first grooves (421) extend along a direction in which the first positioning rod (410) is inserted.

7. The gauge according to claim 1, wherein a second bump (513) is disposed on a side of the second end stop (511) opposite to the second end stop (512), a second insertion hole (520) is disposed on the second positioning block (500), the second end stop (511) is inserted into the second insertion hole (520), and a size of the second bump (513) is larger than a size of the second insertion hole (520).

8. The gauge according to claim 7, wherein the second introduction hole (520) is a rectangular hole, and four corners of the rectangular hole are provided with second grooves (521), and the second grooves (521) extend along a direction in which the second positioning rod (510) is inserted.

9. The gauge according to any one of claims 1-8, wherein two limiting blocks (130) are arranged on the base (100) in an opposite manner, and the connecting plate (101) of the stationary contact (1) is clamped between the two limiting blocks (130).

10. The gauge according to claim 9, wherein the base (100) is provided with a avoidance groove (140), and the arc striking angle (103) of the fixed contact (1) is located at one end of the contact (102) far away from the fixed contact (1) and the part extending out of the connecting plate (101) is disposed in the avoidance groove (140).