阅读说明：本技术 一种大直径密封圈内外径精密测量仪器 (A kind of major diameter sealing ring internal-and external diameter fine measuring instrument ) 是由 王晓伟 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种大直径密封圈内外径精密测量仪器,包括精密测量台,所述精密测量台为空心式结构,所述固定放置板的内部开设有第一限位滑槽,且固定放置板的上表面靠近第一限位滑槽一侧位置处设置有第二刻度线,所述第一限位滑槽的内部设置有第一测量组件,所述第二限位滑槽和第三限位滑槽的内部均设置有第二测量组件。本发明通过第一测量组件可以方便使用者对密封圈的外径进行快速测量,提高了密封圈外径的测量精准度,便于用户对密封圈的外径数值进行记录,通过第二测量组件可以方便使用者对密封圈的内径进行快速测量,节省了密封圈内径的测量时间,同时保障了密封圈内径的测量精准度。(The invention discloses a kind of major diameter sealing ring internal-and external diameter fine measuring instruments, including precision measuring stage, the precision measuring stage is hollow-type structure, the inside of the fixed placement plate offers the first limit sliding chutes, and the upper surface of fixed placement plate is provided with the second graduation mark at one side position of the first limit sliding chutes, first limit sliding chutes are internally provided with the first measurement component, and the inside of second limit sliding chutes and third limit sliding chutes is provided with the second measurement component.The present invention can be convenient user by the first measurement component and carry out rapid survey to the outer diameter of sealing ring, improve the measurement precision of sealing ring outer diameter, it is recorded convenient for outer diameter numerical value of the user to sealing ring, it can be convenient user by the second measurement component and rapid survey carried out to the internal diameter of sealing ring, the time of measuring of internal diameter of the seal ring is saved, while having ensured the measurement precision of internal diameter of the seal ring.)

1. a kind of major diameter sealing ring internal-and external diameter fine measuring instrument, including precision measuring stage (17), which is characterized in that the essence The top surface edge of close test desk (17), which is bolted, to be equipped with the first fixed plate (1), and precision measuring stage (17) is upper Marginal surface is bolted at the first fixed plate (1) rearward position and is equipped with the second fixed plate (10), and described first The junction of fixed plate (1) and the second fixed plate (10) is welded with fixed placement plate (6), the upper table of the precision measuring stage (17) Face offers third limit sliding chutes (14) close to fixed placement plate (6) lower position, and the upper surface of precision measuring stage (17) It is fixedly installed with clamp assemblies (19) at third limit sliding chutes (14) rearward position, the upper table of the precision measuring stage (17) Face offers the second limit sliding chutes (11) at clamp assemblies (19) rearward position, and the upper surface of precision measuring stage (17) is leaned on The first graduation mark is provided at nearly second limit sliding chutes (11) rearward position, the precision measuring stage (17) is hollow-type structure, The inside of the fixed placement plate (6) offers the first limit sliding chutes (9), and the upper surface of fixed placement plate (6) is close to first The second graduation mark is provided at (9) one side position of limit sliding chutes, first limit sliding chutes (9) are internally provided with the first measurement The inside of component (4), second limit sliding chutes (11) and third limit sliding chutes (14) is provided with the second measurement component (12).

2. a kind of major diameter sealing ring internal-and external diameter fine measuring instrument according to claim 1, which is characterized in that described One measurement component (4) include first contact bar (16), the first movable block (2), the first cylindrical sleeves (3), the first threaded rod (5), Second cylindrical sleeves (7), the second contact bar (13) and the second movable block (8), the threaded one end socket of first threaded rod (5) Have the second cylindrical sleeves (7), and the other end screw thread of the first threaded rod (5) is socketed with the first cylindrical sleeves (3), first circle It is fixedly installed on front side of column sleeve cylinder (3) the first movable block (2), is fixedly installed on rear side of second cylindrical sleeves (7) Two movable blocks (8), the bottom of first movable block (2) are fixedly installed with the first contact bar (16), second movable block (8) Bottom be fixedly installed with the second contact bar (13), first contact bar (16) and the second contact bar (13) are limited with first Sliding slot (9) is slidably connected.

3. a kind of major diameter sealing ring internal-and external diameter fine measuring instrument according to claim 2, which is characterized in that described The inner wall of one cylindrical sleeves (3) offers forward screw thread slot, and the first cylindrical sleeves (3) design for open-core type, second circle The inner wall of column sleeve cylinder (7) offers reverse thread slot, and the second cylindrical sleeves (7) design for open-core type.

4. a kind of major diameter sealing ring internal-and external diameter fine measuring instrument according to claim 1, which is characterized in that described Two measurements component (12) include the first slide bar (15), first connecting rod (20), the second slide bar (18), the first limited block (26), the One limit spring (27), third slide bar (22), the second connecting rod (23), the second limit spring (28), the second limited block (29), branch Strut (21), the 4th limit sliding chutes (24) and the 4th slide bar (25), the upper surface of the support rod (21) offer the 4th limit The internal slide of sliding slot (24), the 4th limit sliding chutes (24) is connected with third slide bar (22), and the 4th limit sliding chutes (24) Inside the 4th slide bar (25), the front side of the 4th slide bar (25) are slidably connected at (22) one side position of third slide bar It is provided with the second slide bar (18), and the junction of the 4th slide bar (25) and the second slide bar (18) is welded with the second connecting rod (23), It is provided with the first slide bar (15) on front side of the third slide bar (22), and the junction of third slide bar (22) and the first slide bar (15) It is welded with first connecting rod (20), is provided with the second limited block (29) on the outside of the 4th slide bar (25), and the 4th slide bar (25) it is provided with the second limit spring (28) with the junction of the second limited block (29), the outside setting of the third slide bar (22) Have the first limited block (26), and the junction of third slide bar (22) and the first limited block (26) is provided with the first limit spring (27).

5. a kind of major diameter sealing ring internal-and external diameter fine measuring instrument according to claim 4, which is characterized in that described One limited block (26) and the second limited block (29) are bolted to connection with the 4th limit sliding chutes (24), and the first limited block (26) and the second limited block (29) is cylindrical structure, and first limited block (26) and the second limited block (29) are solid wood The component of material.

6. a kind of major diameter sealing ring internal-and external diameter fine measuring instrument according to claim 4, which is characterized in that described One slide bar (15), the second slide bar (18), third slide bar (22) and the 4th slide bar (25) size be equal, and the first slide bar (15), the second slide bar (18), third slide bar (22) and the 4th slide bar (25) are the component of alloy steel, the third slide bar (22) it is slidably connected with the second limit sliding chutes (11) with the 4th slide bar (25), first slide bar (15) and the second slide bar (18) It is slidably connected respectively with third limit sliding chutes (14).

7. a kind of major diameter sealing ring internal-and external diameter fine measuring instrument according to claim 4, which is characterized in that described Equal in magnitude, and the 4th limit sliding chutes (24) and the second limit sliding chutes of four limit sliding chutes (24) and the second limit sliding chutes (11) (11) on same vertical line.

8. a kind of major diameter sealing ring internal-and external diameter fine measuring instrument according to claim 1, which is characterized in that the folder Holding component (19) includes turntable (30), the second threaded rod (31), briquetting (32) and support pad (33), and clamp assemblies (19) Quantity is four, and being internally embedded for the support pad (33) is equipped with the second threaded rod (31), and support pad (33) and essence Close test desk (17) is bolted to connection, and the top of second threaded rod (31) is fixedly installed with turntable (30), and the The bottom end of two threaded rods (31) is connected with briquetting (32), and second threaded rod (31) and support pad (33) pass through screw thread Connection.

9. a kind of major diameter sealing ring internal-and external diameter fine measuring instrument according to claim 4, which is characterized in that described One limited block (26), the first limit spring (27), the second limit spring (28) and the second limited block (29) are respectively positioned on the 4th limit The inside of sliding slot (24).

Technical field

The present invention relates to sealing ring internal-and external diameter technical field of measuring equipment, specifically a kind of major diameter sealing ring internal-and external diameter essence Close measuring instrument.

Background technique

The selection of sealing ring material directly affects its sealing performance and service life important in inhibiting, the performance of material The service performance of sealing ring, major diameter sealing ring are widely used in machine-building, industrial production and workshop processing and other fields, and big Diametric seal circle needs effectively to detect the internal-and external diameter of finished product in the process of production and processing, guarantees the production of product with this Quality.

Chinese patent discloses a kind of rubber seal measurement tooling and its measurement method (Authorization Notice No. CN 104567608 A), the rubber seal of the patented technology measures tooling, passes through the internal diameter stick and cylindrical structure of circular cone structure Outer diameter stick, the measurement method of rubber seal can be optimized, the precision of measurement can be confirmed, to guarantee the quality of product, In addition, Chinese patent also discloses a kind of major diameter sealing ring internal-and external diameter precision measuring instrument (Authorization Notice No. CN 207439384 U), the major diameter sealing ring internal-and external diameter precision measuring instrument of the patented technology, measurement accuracy is high, and measurement efficiency is high, at low cost, measurement Convenient, eccentricity issues caused by being suitable for because of artificial place, the internal-and external diameter precision which is suitable for other ring shape parts is surveyed Amount, but although the patented technology can solve the measurement problem of sealing ring internal-and external diameter, but cost is relatively high, need by More equipment and instrument come assist complete measurement work, it is more time-consuming and laborious.Therefore, those skilled in the art provide a kind of big Diametric seal circle internal-and external diameter fine measuring instrument, to solve the problems mentioned in the above background technology.

Summary of the invention

The purpose of the present invention is to provide a kind of major diameter sealing ring internal-and external diameter fine measuring instruments, to solve above-mentioned background The problem of being proposed in technology.

To achieve the above object, the invention provides the following technical scheme:

A kind of major diameter sealing ring internal-and external diameter fine measuring instrument, including precision measuring stage, the upper surface of the precision measuring stage Edge, which is bolted, is equipped with the first fixed plate, and the top surface edge of precision measuring stage is close to position on rear side of the first fixed plate The place of setting, which is bolted, is equipped with the second fixed plate, and the junction of first fixed plate and the second fixed plate is welded with fixation The upper surface of placement plate, the precision measuring stage offers third limit sliding chutes, and essence close to fixed placement plate lower position The upper surface of close test desk is fixedly installed with clamp assemblies at third limit sliding chutes rearward position, the precision measuring stage Upper surface offers the second limit sliding chutes at clamp assemblies rearward position, and the upper surface of precision measuring stage is close to the second limit The first graduation mark is provided at the sliding slot rearward position of position, the precision measuring stage is hollow-type structure, the fixed placement plate Inside offers the first limit sliding chutes, and the upper surface of fixed placement plate is provided at one side position of the first limit sliding chutes Two graduation marks, first limit sliding chutes are internally provided with the first measurement component, second limit sliding chutes and third limit The inside of sliding slot is provided with the second measurement component.

As a further solution of the present invention: the first measurement component includes the first contact bar, the first movable block, first Cylindrical sleeves, the first threaded rod, the second cylindrical sleeves, the second contact bar and the second movable block, one end of first threaded rod Screw thread is socketed with the second cylindrical sleeves, and the other end screw thread of the first threaded rod is socketed with the first cylindrical sleeves, first circle It is fixedly installed with the first movable block on front side of column sleeve cylinder, is fixedly installed with the second movable block on rear side of second cylindrical sleeves, The bottom of first movable block is fixedly installed with the first contact bar, and the bottom of second movable block is fixedly installed with second and connects Feeler lever, the first contact bar and the second contact bar are slidably connected with the first limit sliding chutes.

As the present invention further scheme: the inner wall of first cylindrical sleeves offers forward screw thread slot, and the One cylindrical sleeves design for open-core type, and the inner wall of second cylindrical sleeves offers reverse thread slot, and the second cylindrical sleeves It is designed for open-core type.

As further scheme of the invention: the second measurement component includes the first slide bar, first connecting rod, second Slide bar, the first limited block, the first limit spring, third slide bar, the second connecting rod, the second limit spring, the second limited block, support Bar, the 4th limit sliding chutes and the 4th slide bar, the upper surface of the support rod offer the 4th limit sliding chutes, and the 4th limit is slided The internal slide of slot is connected with third slide bar, and the inside of the 4th limit sliding chutes is slidably connected at one side position of third slide bar There is the 4th slide bar, the second slide bar is provided on front side of the 4th slide bar, and the junction of the 4th slide bar and the second slide bar is welded There is the second connecting rod, the first slide bar is provided on front side of the third slide bar, and the junction of third slide bar and the first slide bar is welded It is connected to first connecting rod, the second limited block, and the company of the 4th slide bar and the second limited block are provided on the outside of the 4th slide bar The place of connecing is provided with the second limit spring, and the first limited block, and third slide bar and the first limit are provided on the outside of the third slide bar The junction of position block is provided with the first limit spring.

As further scheme of the invention: the first limit block and the second limit block are logical with the 4th limit sliding chutes It crosses bolt to be fixedly connected, and the first limit block and the second limit block are cylindrical structure, first limited block and the second limit Position block is the component of solid wood material.

As the present invention further scheme: first slide bar, the second slide bar, third slide bar and the 4th slide bar it is big It is small to be equal, and the first slide bar, the second slide bar, third slide bar and the 4th slide bar are the component of alloy steel, the third Slide bar and the 4th slide bar are slidably connected with the second limit sliding chutes, and first slide bar and the second slide bar limit with third slide respectively Slot is slidably connected.

As the present invention further scheme: the 4th limit sliding chutes and the second limit sliding chutes it is equal in magnitude, and 4th limit sliding chutes and the second limit sliding chutes are on same vertical line.

As further scheme of the invention: the clamp assemblies include turntable, the second threaded rod, briquetting and supporting pad Piece, and the quantity of clamp assemblies be four, being internally embedded for the support pad is equipped with the second threaded rod, and support pad with Precision measuring stage is bolted to connection, and the top of second threaded rod is fixedly installed with turntable, and the second threaded rod Bottom end is connected with briquetting, and second threaded rod is connected through a screw thread with support pad.

As the present invention further scheme: first limited block, the first limit spring, the second limit spring and the Two limited blocks are respectively positioned on the inside of the 4th limit sliding chutes.

Compared with prior art, the beneficial effects of the present invention are:

1, the present invention can be convenient user by the first measurement component and carry out rapid survey to the outer diameter of sealing ring, improve close The measurement precision of seal outer diameter records convenient for outer diameter numerical value of the user to sealing ring；

2, user can be convenient by the second measurement component and rapid survey is carried out to the internal diameter of sealing ring, save in sealing ring The time of measuring of diameter, while having ensured the measurement precision of internal diameter of the seal ring, the design separately measures the internal-and external diameter of sealing ring, Not only measurement precision improves, but also cost is relatively low, reduce needed when measurement by relevant device quantity, when measurement Between greatly shorten, have a vast market foreground.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of major diameter sealing ring internal-and external diameter fine measuring instrument；

Fig. 2 is the enlarged drawing of part A in Fig. 1；

Fig. 3 is a kind of structural schematic diagram of the second measurement component in major diameter sealing ring internal-and external diameter fine measuring instrument；

Fig. 4 is a kind of explosive view of the second measurement component in major diameter sealing ring internal-and external diameter fine measuring instrument；

Fig. 5 is a kind of structural schematic diagram of the first measurement component in major diameter sealing ring internal-and external diameter fine measuring instrument；

Fig. 6 is a kind of structural schematic diagram of clamp assemblies in major diameter sealing ring internal-and external diameter fine measuring instrument.

In figure: 1, the first fixed plate；2, the first movable block；3, the first cylindrical sleeves；4, the first measurement component；5, the first spiral shell Rasp bar；6, fixed placement plate；7, the second cylindrical sleeves；8, the second movable block；9, the first limit sliding chutes；10, the second fixed plate； 11, the second limit sliding chutes；12, the second measurement component；13, the second contact bar；14, third limit sliding chutes；15, the first slide bar；16, First contact bar；17, precision measuring stage；18, the second slide bar；19, clamp assemblies；20, first connecting rod；21, support rod；22, Third slide bar；23, the second connecting rod；24, the 4th limit sliding chutes；25, the 4th slide bar；26, the first limited block；27, the first limit Spring；28, the second limit spring；29, the second limited block；30, turntable；31, the second threaded rod；32, briquetting；33, support pad.

Specific embodiment

Please refer to Fig. 1~6, in the embodiment of the present invention, a kind of major diameter sealing ring internal-and external diameter fine measuring instrument, including essence Close test desk 17, the top surface edge of precision measuring stage 17, which is bolted, is equipped with the first fixed plate 1, and precision measuring stage 17 top surface edge is bolted at 1 rearward position of the first fixed plate is equipped with the second fixed plate 10, and first is solid The junction of fixed board 1 and the second fixed plate 10 is welded with fixed placement plate 6, and the upper surface of precision measuring stage 17 is close to fixed placement 6 lower position of plate offers third limit sliding chutes 14, and the upper surface of precision measuring stage 17 is after third limit sliding chutes 14 Clamp assemblies 19 are fixedly installed at side position, clamp assemblies 19 include turntable 30, the second threaded rod 31, briquetting 32 and supporting pad Piece 33, and the quantity of clamp assemblies 19 is four, being internally embedded for support pad 33 is equipped with the second threaded rod 31, and supporting pad Piece 33 is bolted to connection with precision measuring stage 17, and the top of the second threaded rod 31 is fixedly installed with turntable 30, and second The bottom end of threaded rod 31 is connected with briquetting 32, and the second threaded rod 31 is connected through a screw thread with support pad 33, passes through clamping Component 19 can be convenient user and be clamped processing to sealing ring, so that it is not susceptible to deformation in measurement process, reduces Error improves the accuracy of measurement.

The upper surface of precision measuring stage 17 offers the second limit sliding chutes 11, and essence at 19 rearward position of clamp assemblies The upper surface of close test desk 17 is provided with the first graduation mark at 11 rearward position of the second limit sliding chutes, and precision measuring stage 17 is Hollow-type structure, the inside of fixed placement plate 6 offers the first limit sliding chutes 9, and the upper surface of fixed placement plate 6 is close to first It is provided with the second graduation mark at 9 one side position of limit sliding chutes, the first limit sliding chutes 9 are internally provided with the first measurement component 4, and One measurement component 4 includes the first contact bar 16, the first movable block 2, the first cylindrical sleeves 3, the first threaded rod 5, the second cylindrical sleeve Cylinder 7, second contacts bar 13 and the second movable block 8, the threaded one end of the first threaded rod 5 are socketed with the second cylindrical sleeves 7, and first The other end screw thread of threaded rod 5 is socketed with the first cylindrical sleeves 3, and the front side of the first cylindrical sleeves 3 is fixedly installed with the first activity Block 2, the rear side of the second cylindrical sleeves 7 are fixedly installed with the second movable block 8, and the bottom of the first movable block 2 is fixedly installed with first Bar 16 is contacted, the bottom of the second movable block 8 is fixedly installed with the second contact bar 13, and the first contact bar 16 and the second contact bar 13 are equal It is slidably connected with the first limit sliding chutes 9, the inner wall of the first cylindrical sleeves 3 offers forward screw thread slot, and the first cylindrical sleeves 3 are Open-core type design, the inner wall of the second cylindrical sleeves 7 offers reverse thread slot, and the second cylindrical sleeves 7 design for open-core type, leads to The outer diameter progress rapid survey that the first measurement component 4 can be convenient user to sealing ring is crossed, the survey of sealing ring outer diameter is improved Precision is measured, is recorded convenient for outer diameter numerical value of the user to sealing ring.

The inside of second limit sliding chutes 11 and third limit sliding chutes 14 is provided with the second measurement component 12, the second measurement group Part 12 is sliding including the first slide bar 15, first connecting rod 20, the second slide bar 18, the first limited block 26, the first limit spring 27, third Bar 22, the second connecting rod 23, the second limit spring 28, the second limited block 29, support rod 21, the 4th limit sliding chutes 24 and the 4th are sliding Bar 25, the upper surface of support rod 21 offer the 4th limit sliding chutes 24, and the internal slide of the 4th limit sliding chutes 24 is connected with third Slide bar 22, and the inside of the 4th limit sliding chutes 24 slidably connects the 4th slide bar 25 at 22 1 side position of third slide bar, the The front side of four slide bars 25 is provided with the second slide bar 18, and the junction of the 4th slide bar 25 and the second slide bar 18 is welded with the second connection Bar 23, the front side of third slide bar 22 is provided with the first slide bar 15, and third slide bar 22 and the junction of the first slide bar 15 are welded with First connecting rod 20, the outside of the 4th slide bar 25 are provided with the second limited block 29, and the 4th slide bar 25 and the second limited block 29 Junction is provided with the second limit spring 28, and the outside of third slide bar 22 is provided with the first limited block 26, and third slide bar 22 with The junction of first limited block 26 is provided with the first limit spring 27, and the first limited block 26 and the second limited block 29 are limited with the 4th Position sliding slot 24 is bolted to connection, and the first limited block 26 and the second limited block 29 are cylindrical structure, the first limit Block 26 and the second limited block 29 are the component of solid wood material, and the first slide bar 15, the second slide bar 18, third slide bar 22 and the 4th are sliding The size of bar 25 is equal, and the first slide bar 15, the second slide bar 18, third slide bar 22 and the 4th slide bar 25 are alloy steel Component, third slide bar 22 and the 4th slide bar 25 be slidably connected with the second limit sliding chutes 11, the first slide bar 15 and the second slide bar 18 are slidably connected with third limit sliding chutes 14 respectively, the 4th limit sliding chutes 24 and the second limit sliding chutes 11 it is equal in magnitude, and Four limit sliding chutes 24 and the second limit sliding chutes 11 are on same vertical line, the first limited block 26, the first limit spring 27, second Limit spring 28 and the second limited block 29 are respectively positioned on the inside of the 4th limit sliding chutes 24, can be convenient by the second measurement component 12 User carries out rapid survey to the internal diameter of sealing ring, saves the time of measuring of internal diameter of the seal ring, while having ensured sealing ring The measurement precision of internal diameter.

The working principle of the invention is: user drives first by third slide bar 22 and the opposite pulling of the 4th slide bar 25 First slide bar 15 and the relative movement of the second slide bar 18, sealing ring is placed on the top of third limit sliding chutes 14 by user at this time, into And sealing ring wraps up the first slide bar 15 and the second slide bar 18, user is again by rotating clockwise turntable 30 at this time, this When drive the second threaded rod 31 to rotate clockwise, and then briquetting 32 is driven to move down, to carry out to a turning of sealing ring tight Gu due to there are four clamp assemblies 19 altogether setting, so can be carried out to four turnings of sealing ring by clamp assemblies 19 tight Gu sealing ring is less prone to loose phenomenon in transverse and longitudinal direction at this time, then user unclamps third slide bar 22 and the 4th slide bar 25, Under the action of the first limit spring 27 and the second limit spring 28,25 reverse motions of third slide bar 22 and the 4th slide bar at this time, And then the first slide bar 15 and 18 reverse motions of the second slide bar are driven, when the first slide bar 15 and the second slide bar 18 are moved in sealing ring Stop movement when on the quadrantal points of diameter, the distance between third slide bar 22 and the 4th slide bar 25 are the internal diameter of the sealing ring at this time Value, and the distance between third slide bar 22 and the 4th slide bar 25 can be checked by the first graduation mark of rear side, pass through second Measurement component 12 can be convenient user and carry out rapid survey to the internal diameter of sealing ring, when saving the measurement of internal diameter of the seal ring Between, while having ensured the measurement precision of internal diameter of the seal ring, then user rotates clockwise the first threaded rod 5, drives at this time 7 relative motion of first cylindrical sleeves 3 and the second cylindrical sleeves, since the first contact bar 16 and the second contact bar 13 are respectively with first Limit sliding chutes 9 are slidably connected, and then drive the first movable block 2 and 8 relative motion of the second movable block, at this time the first contact 16 He of bar Second contact 13 relative motion of bar, since the quadrantal points of the first contact bar 16 and the second contact bar 13 and sealing ring is in same water On horizontal line, so with the continuous movement of the first contact bar 16 and the second contact bar 13, when the first contact bar 16 and the second contact Bar 13 respectively quadrant point contact with sealing ring when, stop operating the first threaded rod 5 at this time, due to 2 He of the first movable block First contact bar 16 it is of same size, the second movable block 8 and the second contact bar 13 it is of same size, so stop it is mobile after the The distance between one movable block 2 and the second movable block 8 value are the outer diameter value of the sealing ring, the first movable block 2 and the second activity The distance between block 8 can be checked by the second graduation mark, and when user rotates counterclockwise the first threaded rod 5, at this time Drive the first contact bar 16 and the second contact bar 13 mobile on the contrary, to carry out convenient for users to the outer diameter to next sealing ring Measurement can be convenient user by the first measurement component 4 and carry out rapid survey to the outer diameter of sealing ring, improves outside sealing ring The measurement precision of diameter records convenient for outer diameter numerical value of the user to sealing ring, and the design separates the internal-and external diameter of sealing ring Measurement not only measures precision and improves, but also cost is relatively low, reduce needed when measurement by relevant device quantity, Time of measuring greatly shortens, and has a vast market foreground.

It is above-described, it is merely preferred embodiments of the present invention, but protection scope of the present invention is not limited to This, anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention And its inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.