CN210070887U

CN210070887U - Non-rigid connection quick-drive high-precision displacement measuring device

Info

Publication number: CN210070887U
Application number: CN201921325539.9U
Authority: CN
Inventors: 黄郑平; 杜军
Original assignee: Chengdu Hualiang Sensor Co Ltd
Current assignee: Chengdu Hualiang Sensor Co Ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2020-02-14
Anticipated expiration: 2029-08-15

Abstract

The utility model discloses a non-rigid connection's high accuracy displacement measurement device of quick drive, which comprises a bracket, the screwed pipe, the screw thread post, the anvil measurement, screwed pipe and screw thread post cooperation, be equipped with the axle of surveying in the support, elastic element, a measuring element for measuring the axle displacement, the one end of axle of surveying is the gauge head, gauge head and anvil measurement cooperation, axle of surveying and screw thread post connection, the screw thread post only has the degree of freedom in the axial under guiding mechanism's effect, the axle of surveying passes through linear guide and leg joint, elastic element's one end links to each other with the support, the other end links to each other with the axle of surveying, elastic element applys the restoring force towards measured point direction to the axle of surveying. The utility model discloses the survey axle adopts non-rigid connection with the drive structure, and the measuring staff only provides invariable dynamometry by the spring in same deformation position, has improved repeatability precision, prevents that too big exogenic action from influencing measuring tool precision, damage on the measuring staff and being surveyed the piece, adopts rotatory, the mode of stirring, satisfies the demand of fast switch over size, and measurement of efficiency is high.

Description

Non-rigid connection quick-drive high-precision displacement measuring device

Technical Field

The utility model relates to a displacement measurement device especially relates to a non-rigid connection's high accuracy displacement measurement device of quick drive.

Background

The displacement measuring device, such as a micrometer, can measure the length to 0.01 mm. The existing micrometer has the following defects:

1. a common micrometer adopts a ratchet wheel device, the force measurement is stable when the ratchet wheel device is in constant speed, but the rotation speed of the ratchet wheel is easy to fluctuate due to the influence of external factors, the finally generated measuring force is not stable enough, and the measurement of the size of the same part can generate larger errors, so the measurement repeatability precision is lower. The lever type micrometer is relatively stable in force measurement, but is limited in an extremely small stroke range, high-precision measurement of the lever type micrometer is required, a standard measuring block is required to be used for zero adjustment before measurement, namely, relative measurement is carried out, the measurement process is relatively complicated, and an ordinary micrometer adopts absolute measurement, so that the measurement process is relatively simple.

2. The measuring shaft and the driving structure of the traditional measuring tool are rigidly connected, a gap must exist between the driving part and the measuring tool when the driving part can move, and the gap can transmit the external force of the measuring tool to the measuring shaft through rigid connection, so that the measuring rod is skewed after being subjected to lateral force, the original parallel precision between the measuring rod and the measuring anvil is lost, and a parallelism error is generated, so that the influence degree is caused to the measuring precision, the force is not constant due to the axial force, and the measuring precision is also influenced;

3. the common micrometer adopts a screw-in structure, the screw-in structure can cause the surface of a measured part to be scratched and damage the measured part, a measuring rod can generate parallelism error after being subjected to lateral force and influence the measurement precision, the measuring rod and a threaded pipe are in threaded fit, the measuring rod and the threaded pipe can be mutually fixed when not rotating, no degree of freedom exists in the axial direction, when the threaded pipe is rotated too fast during manual operation, a measuring rod measuring head collides with the measured part to damage the measured part, the surface of the measured part is subjected to micro deformation due to collision, the original size is not changed, the measurement precision is influenced, meanwhile, pressure is applied between the measuring head and an anvil, the bow-shaped support is subjected to micro deformation, the measurement precision is also influenced, the caliper adopts a gear type, the defects of the rotary micrometer are overcome, but because the caliper is usually adopted, the stress of the measuring rod is also inconstant, repeatability errors are easy to occur;

4. in the measurement of big batch and wide-range, need artifical rotatory screwed pipe constantly so that gauge head and testing anvil are fit for the part of different size, different ranges, and the range switching cycle is long, measurement inefficiency, and the measurement personnel operation wastes time and energy.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a quick displacement measurement device that the dynamometry is invariable, measurement of efficiency is high, measurement accuracy is high, measurement is convenient.

The purpose of the utility model is realized through the following technical scheme:

the non-rigid connection rapid driving high-precision displacement measuring device comprises a support, a threaded pipe, a threaded column and a measuring anvil, wherein threads are arranged in the threaded pipe and are matched with threads arranged outside the threaded column, a measuring shaft, an elastic element and a measuring element for measuring the displacement of the measuring shaft are arranged in the support, one end of the measuring shaft is a measuring head, the measuring head is matched with the measuring anvil, the measuring shaft is connected with the threaded column, the threaded column only has freedom degree in the axial direction under the action of a guide mechanism, the measuring shaft is connected with the support through a linear guide rail, one end of the elastic element is connected with the support, the other end of the elastic element is connected with the measuring shaft, and the elastic element applies restoring force to the measuring shaft towards the direction.

Preferably, the measuring shaft comprises a measuring rod and an anti-rotation rod, the measuring rod is connected with the threaded column through the anti-rotation rod, the anti-rotation rod is connected with the support through a linear guide rail, the non-measuring head end of the measuring rod is connected with one end of the anti-rotation rod through a non-rigid connecting portion, and after the non-rigid connecting portion is connected, the measuring rod and the anti-rotation rod have mutual degrees of freedom in the radial direction and the axial direction.

Preferably, the measuring staff is equipped with the breach with the joint end of preventing the bull stick, prevent the bull stick with the link of measuring staff be equipped with breach complex lug, non-rigid connection portion include lug and breach, the lug include with prevent the connecting portion that the bull stick is connected and with the block portion that connecting portion are connected, the orthographic projection area of block portion is greater than the orthographic projection area of connecting portion, when the lug is coincided with the geometric centre of breach, the outer wall and the breach inner wall contactless of lug.

Preferably, the non-rigid connecting part is made of flexible materials.

Preferably, the support on be equipped with the pin of preventing changeing No. one, be equipped with the pin of preventing changeing No. two on the screw thread post, be equipped with the spout along preventing changeing the pole axis direction on preventing changeing the pole, prevent changeing the pin and prevent for one number two the pin with the spout cooperation, just prevent changeing the equal perpendicular to axis of changeing the pole of the axis of pin and preventing changeing the pin for one number two.

Preferably, the support inside fixed be provided with the guide block, the fixed block that is provided with on the spindle is equipped with the guide bar on the fixed block, the axis of guide bar is perpendicular with the axis of spindle, be equipped with on the guide block with guide bar complex guide way, the guide way is parallel with the spindle axis.

Preferably, the elastic element is a tension spring, the guide block is provided with a tension spring column, the support is internally provided with a pulley, the tension spring is matched with the pulley, one end of the tension spring is fixed on the tension spring column, the other end of the tension spring penetrates through the pulley and then is fixed on the guide rod, one end of the tension spring is connected with the support through the tension spring column, and the other end of the tension spring is connected with the measuring shaft through the guide rod.

Preferably, the threaded column is provided with a shaft hole, the non-measuring head end of the measuring shaft is matched with the shaft hole and penetrates through the shaft hole, the non-measuring head end of the measuring shaft is provided with a limiting part, the cross section area of the limiting part is larger than that of the shaft hole, and the limiting part is used for preventing the measuring shaft from coming out of the shaft hole towards one end of the measured point but can freely move towards the axial direction far away from the measured point.

Preferably, the measuring element is a coding grating, and the coding grating comprises a fixed grating which is relatively static with the support and a movable grating which synchronously acts with the measuring shaft.

Preferably, the support on be equipped with coaxial axle cover and rotating-proof sleeve, the one end and the support threaded connection of axle cover, the other end and the rotating-proof sleeve threaded connection of axle cover, the anti-rotation rod is established in the inside of axle cover and rotating-proof sleeve, the axle cover is established in the inside of screwed pipe with the rotating-proof sleeve, the screwed pipe inner wall is equipped with the stopper No. one, the rotating-proof sleeve outer wall is equipped with No. two stoppers with stopper complex No. one, still is equipped with the spanner seat on the support, the articulated spanner that is equipped with on the spanner seat, the spanner cooperates with the edge of screwed pipe, the spanner is used for promoting the screwed pipe to the direction motion of keeping away from the support.

The utility model has the advantages that:

(1) one end of the tension spring is connected with the support, the other end of the tension spring is connected with the measuring rod, the tension spring provides unique restoring force for the measuring rod, and the tension force applied to the measuring rod at any one same moving position is a constant value according to Hooke's law, so that the force applied to the measuring rod is constant, and the repeatability precision of the measuring tool is remarkably improved.

(2) One end of the rotation preventing rod is non-rigidly connected with the measuring rod, the other end of the rotation preventing rod is non-rigidly connected with the threaded column, external force applied to the measuring rod by manual driving is avoided, the rotation preventing rod is driven only by the threaded pipe to provide axial one-way driving force for the measuring rod, the force measurement is not influenced by the one-way driving force all the time, and therefore the measuring accuracy is improved.

(3) Screwed pipe and screw thread post use self-locking screw-thread fit to drive and prevent the bull stick and provide the quick displacement drive for the measuring staff, and can the auto-lock in the stroke optional position, spanner and screwed pipe non-rigid connection, spanner drive screwed pipe axial displacement drive prevent the bull stick can provide the quick drive of fixed little stroke at the auto-lock position, improved batch measurement's measurement of efficiency.

(4) The advantages of absolute measurement of a common micrometer, the advantages of self-adaption of the lever micrometer to the size of a part to be measured and the advantages of straight-in and straight-out of a caliper gauge are integrated, the problems that a ratchet wheel of a traditional micrometer is rigidly connected with a measuring rod, a ratchet wheel is manually driven, axial force measurement is not constant, measurement errors are caused are solved, and the problems that the lever micrometer can only measure force constantly at a minimum stroke and needs to calibrate a zero position are solved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a structure of a notch and a bump;

FIG. 3 is a schematic view of a structure of a measuring rod matched with a fixed block and a guide block;

FIG. 4 is a schematic view of the internal structure of a threaded pipe;

FIG. 5 is a schematic view of a wrench and a threaded pipe;

in the figure, 1-bracket, 2-anvil, 3-bowl-shaped rubber, 4-fixed shaft sleeve, 5-measuring rod, 6-fixed grid, 7-tension spring, 8-movable grid, 9-guide rod, 10-tail end shaft sleeve, 11-shaft cover, 12-anti-rotation rod, 13-anti-rotation sleeve, 14-first anti-rotation pin, 15-threaded column, 16-screw, 17-end cover, 18-threaded pipe, 19-second anti-rotation pin, 20-wrench, 21-wrench shaft, 22-wrench seat, 23-guide block, 24-tension spring column, 25-battery, 26-pulley, 27-notch, 28-lug, 29-connecting part, 30-clamping part, 31-fixed block, 32-gasket and 33-first limiting block.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution:

the non-rigid connection rapid driving high-precision displacement measuring device comprises a support 1, a threaded pipe 18, a threaded column 15 and an anvil 2, wherein a measuring shaft, an elastic element and a measuring element for measuring the displacement of the measuring shaft are arranged in the support 1, and threads are arranged in the threaded pipe 18 and are matched with threads arranged outside the threaded column 15. The support 1 on be equipped with coaxial shaft lid 11 and preventing swivel 13, the one end and the support 1 threaded connection of shaft lid 11, the other end and the preventing swivel 13 threaded connection of shaft lid 11, prevent that the commentaries on classics pole 12 is established in the inside of shaft lid 11 and preventing swivel 13, the inside at screwed pipe 18 is established to shaft lid 11 and preventing swivel 13.

The measuring shaft is connected with the support 1 through a linear guide rail, one end of the elastic element is connected with the support 1, the other end of the elastic element is connected with the measuring shaft, and the elastic element applies restoring force towards the direction of a measured point to the measuring shaft.

Further, the measuring shaft comprises a measuring rod 5 and an anti-rotation rod 12, the measuring rod 5 is connected with a threaded column 15 through the anti-rotation rod 12, the anti-rotation rod 12 is connected with the support 1 through a linear guide rail, the non-measuring head end of the measuring rod 5 is connected with one end of the anti-rotation rod 12 through a non-rigid connecting portion, and after the non-rigid connecting portion is connected, the measuring rod 5 and the anti-rotation rod 12 have mutual degrees of freedom in the radial direction and the axial direction.

The threaded column 15 is provided with a shaft hole, a non-measuring end (the end of the anti-rotation rod 12 far away from the measuring rod 5) of the measuring shaft is matched with the shaft hole and penetrates through the shaft hole, a limiting part is arranged at the non-measuring end (the end of the anti-rotation rod 12 far away from the measuring rod 5) of the measuring shaft, the cross-sectional area of the limiting part is larger than that of the shaft hole, and the limiting part is used for preventing the measuring shaft from being separated from the shaft hole towards one end of the measured point, but has freedom degree in the axial direction far away from the measured point. Specifically, the one end of the anti-rotation rod 12 far away from the non-rigid connection part is provided with a screw 16 through threaded connection, the screw 16 is coaxial with the anti-rotation rod 12, a gasket 32 is arranged between the screw 16 and the anti-rotation rod 12, and the limiting part is the gasket 32. The washer 32 is end-fitted to the threaded post 15.

Be equipped with in the support 1 with 5 complex fixed axle sleeve 4 of measuring staff and tail end axle sleeve 10, for measuring staff 5 provides removal direction and support, be equipped with calathiform rubber 3 on the fixed axle sleeve 4, for whole measuring device provides good leakproofness, waterproof dustproof, fixed axle sleeve 4 can adopt dense pearl bearing, closely cooperate with measuring staff 5, do not have the clearance, prevent that measuring staff 5 from taking place to incline a little, the swing, improve measurement accuracy, simultaneously, dense pearl bearing has longer life.

Further, the non-rigid connecting portion may be made of a flexible material, such as a rope, a belt, a flexible plastic product, etc., or, the connecting end of the measuring bar 5 and the rotation-proof bar 12 is provided with a gap 27, the connecting end of the rotation-proof bar 12 and the measuring bar 5 is provided with a convex block 28 matched with the gap 27, the non-rigid connecting part comprises a lug 28 and a notch 27, the lug 28 comprises a connecting part 29 connected with the anti-rotation rod 12 and a clamping part 30 connected with the connecting part 29, the orthographic projection area of the clamping part 30 is larger than that of the connecting part 29, when the clamping part 30 cannot be disengaged from the notch 27 and the lug 28 is overlapped with the geometric center of the notch 27, the outer wall of the projection 28 is not in contact with the inner wall of the notch 27, so that the measuring rod 5 and the anti-rotation rod 12 have mutual degrees of freedom in the radial direction and the axial direction within a certain range (the T-shaped notch and the T-shaped projection are adopted in the embodiment).

The measuring rod 5 and the rotation preventing rod 12 are connected with the support 1 through linear guide rails, the traditional rotating in-out mode is replaced, the straight-in straight-out mode is adopted, and the parallel precision is improved. The inside fixed guide block 23 that is provided with of support 1, the fixed block 31 that is provided with on the measuring staff 5, be equipped with the guide bar 9 on the fixed block 31, the axis of guide bar 9 is perpendicular with the 5 axes of measuring staff, be equipped with on the guide block 23 with guide bar 9 complex guide way, the guide way is parallel with 5 axes of measuring staff. Support 1 on be equipped with one number and prevent changeing pin 14, further, prevent changeing pin 14 and fix on preventing changeing 13, be equipped with No. two on the screw post 15 and prevent changeing pin 19, be equipped with the spout along preventing changeing 12 axis directions on preventing changeing pole 12, prevent changeing pin 14 and No. two prevent changeing pin 19 with the spout cooperation, and prevent changeing 14 and No. two equal perpendicular to of axis of changeing pole 12 of the equal axis of changeing pin 19 of commentaries on classics pin 19. First prevent that rotation pin 14 card advances in preventing the spout of bull stick 12, the restriction is prevented that bull stick 12 is rotatory, but guarantee to prevent bull stick 12 axial displacement only, No. two prevent that rotation pin 19 card advances in preventing the spout of bull stick 12 by the restriction is rotatory, be connected with screw post 15 again, restriction screw post 15 is rotatory, but guarantee screw post 15 axial displacement only, adopt the straight advancing type structure, possess the quick efficient characteristics of straight advancing type measuring tool, possess the straight advancing type structure simultaneously when measuring, do not take place the characteristics of looks mutual friction after contacting with the work piece, the protection is measured the face and is surveyed the piece.

Furthermore, one end of the elastic element is connected with the support 1, the other end of the elastic element is connected with the measuring rod 5, and the elastic element applies restoring force to the measuring rod 5 in the direction away from the anti-rotation rod 12. Furthermore, the elastic element is a tension spring 7, a tension spring column 24 is arranged on the guide block 23, a pulley 26 is arranged in the support 1, the tension spring 7 is matched with the pulley 26, one end of the tension spring 7 is fixed on the tension spring column 24, the other end of the tension spring 7 passes through the pulley 26 and then is fixed on the guide rod 9, one end of the tension spring 7 is connected with the support 1 through the tension spring column 24, the other end of the tension spring 7 is connected with the measuring rod 5 through the guide rod 9, because support 1 inner space is less, has lengthened the length of extension spring 7 through the mode of pulley 26 (if extension spring 7 length is shorter, when the displacement of measuring staff 5 exceeded the ultimate deformation volume of extension spring 7, made extension spring 7 elastic coefficient change, and then made extension spring 7 become unstable to the pulling force of measuring staff 5, measuring staff 5 gauge head and the part that is surveyed can not well cooperate, influence measuring effect), provide stable pulling force for measuring staff 5.

Furthermore, the measuring element is a coding grating, the battery 25 provides electric quantity support for the coding grating, the coding grating comprises a fixed grating 6 which is relatively static with the support 1 and a movable grating 8 which moves synchronously with the measuring shaft, the displacement generated when the measuring rod 5 moves is the displacement between the fixed grating 6 and the movable grating 8, the displacement generated when the measuring rod 5 moves is measured through the displacement between the fixed grating 6 and the movable grating 8, an electronic measuring mode is adopted, the measurement is convenient and rapid, and the measuring efficiency is improved. Further, the fixed grid 6 is fixed on the inner wall of the bracket 1, and the movable grid 8 is arranged on the fixed block 31.

The inner wall of the threaded pipe 18 is provided with a first limiting block 33, the outer wall of the anti-rotation sleeve 13 is provided with a second limiting block 34 matched with the first limiting block 33, and the first limiting block 33 and the second limiting block 34 are used for preventing the threaded pipe 18 from being separated from the support 1, namely preventing the movable fence 8 from exceeding the stroke and being damaged due to excessive displacement of the measuring rod 5. The support 1 is further provided with a wrench seat 22, the wrench seat 22 is hinged with a wrench 20 through a wrench shaft 21, the wrench 20 is matched with the edge of the threaded pipe 18, the wrench 20 is used for pushing the threaded pipe 18 to move in a direction away from the support 1, and meanwhile the longest displacement of the wrench 20 for pushing the threaded pipe 18 is the distance between the first limiting block 33 and the second limiting block 34. As shown in fig. 5, since the wrench 20 is hinged to perform arc displacement, considering that if only the end of the wrench 20 is engaged with the edge of the threaded pipe 18, when the arc displacement is large and the length of the wrench 20 is limited, the wrench 20 may be disengaged from the edge of the threaded pipe 18, as shown in fig. 5, the wrench 20 is designed into a semicircular shape, so as to increase the contact area between the wrench 20 and the threaded pipe 18, and prevent the above situation, the contact surface between the wrench 20 and the threaded pipe 18 is set into an arc shape, so that the contact point trajectory between the wrench 20 and the threaded pipe 18 is adapted to the movement trajectory of the wrench 20, so that the wrench 20 and the threaded pipe 18 are in contact more smoothly, and the phenomena of seizing and scratch are prevented, which is in accordance with ergonomics and comfortable in.

The end of the threaded pipe 18 is provided with an end cap 17 for sealing the support 1 and limiting the displacement of the measuring bar 5, preventing the moving grid 8 from exceeding the stroke and being damaged.

The utility model discloses a use and principle are as follows (take fig. 1 as an example):

in a non-measuring state (a preset rest position and the action of stretching the measuring rod 5), the gasket 32 is kept in contact with the end face of the threaded column 15, and provides a counterforce for overcoming the combined force of the tension spring 7 and the gravity of the measuring rod 5, so that static balance or dynamic balance is achieved. In the measuring state (the measuring end of the measuring rod 5 and the measuring anvil 2 are firstly contacted with the measured piece at the same time, or the measuring end is directly contacted with the measuring anvil 2 in the zero position), the threaded column 15 moves towards the measured piece, so that the end face of the threaded column 15 is separated from the end face gasket 32. The measuring rod 5 is only axially influenced by the pulling force of the spring and the counterforce provided by the measured piece and is not influenced by other forces, so that the force measurement is constant at any one same measuring position.

During measurement, the threaded pipe 18 is rotated by estimating the approximate length of the part to be measured, because the first anti-rotation pin 14 is fixed on the anti-rotation sleeve 13, namely fixed relative to the bracket 1, the second anti-rotation pin 19 is arranged on the threaded column 15, namely fixed relative to the threaded column 15, and the first anti-rotation pin 14 and the second anti-rotation pin 19 are simultaneously limited by the sliding grooves on the anti-rotation rod 12, when the threaded pipe 18 is rotated, the threaded column 15 advances relative to the threaded pipe 18, even if the measuring rod 5 is far away from the measuring anvil 2, and when the wrench 20 is wrenched, because the threaded column 15 and the threaded pipe 18 are fixed through threads, the anti-rotation rod 12 and the measuring rod 5 are continuously far away from the measuring anvil 2 through the limiting part, during large-batch detection of parts with small size difference, the threaded pipe 18 is rotated in advance to enable the distance between the measuring rod 5 and the measuring anvil 2 to be approximately suitable for the part to be measured, and the wrench 20 is self-locked at the position, and only the wrench 20 is, the same applies to pulling the threaded tube 18 directly outwards) to make the spindle 5 readjusted so that the spindle 5 finally fits the part size. Make things convenient for like this fast with the optional position transform of measuring tool at the wide-range, satisfy the demand of fast switch-over size, it constantly rotates the screwed pipe so that measuring head and test anvil 2 complex trouble to have removed the manual work in the past from, measurement efficiency is greatly improved, the screw post 15 and the screwed pipe 18 of being restricted to rotate are with big footpath self-locking screw thread cooperation, screwed pipe 18 is rotatory to provide the quick axial drive of full stroke for screwed post 15, and can auto-lock in the stroke optional position, can be applied to not unidimensional short-term test, spanner 20 and screwed pipe 18 non-rigid connection drive screwed pipe 18 axial displacement drive prevent that the bull stick 12 provides the quick drive of fixed stroke (the stroke distance is the distance between No. one stopper 33 and No. two stoppers 34) in the auto-lock position, can be applied to quick batch detection.

When the threaded pipe 18 is rotated, because the threaded column 15 is only matched with the rotation-preventing rod 12, the lateral force generated during rotation only affects the rotation-preventing rod 12, and because the rotation-preventing rod 12 is connected with the measuring rod 5 by a non-rigid connecting part, the lateral force is not transmitted to the measuring rod 5, the measuring rod 5 only pulls the tension of the tension spring 7, when the measuring head and the measuring anvil 2 are matched and simultaneously contact with a part to be measured, the threaded column 15 continues to move towards the part to be measured, the end surface of the threaded column 15 and the gasket 32 are separated from or in a balanced state of mutual contact but not applying an action force, the external force is not transmitted to the measuring rod 5 and a workpiece, the measuring rod 5 is axially subjected to the tension of the spring and a reaction force provided by the part to be measured and is not influenced by other forces, the measuring rod 5 always provides a constant force measurement at the same deformation position by the tension spring 7 (according to hooke's law F = kx, the same position, f is constant), the repeatability accuracy of the gauge is significantly improved.

Because the rotation preventing rod 12 is matched with the shaft hole of the threaded column 15, the measuring rod 5 is not fixed with the threaded pipe 18 like a traditional micrometer, so that the situation that the measuring head of the measuring rod 5 slightly deforms the surface of a part to be measured is avoided (the measuring rod 5 has freedom degree in the axial direction and is self-adaptive to the size of the part to be measured).

Therefore, during measurement, the displacement of the measuring rod 5 is completely equal to the size of the measured part and is not influenced by other factors, and a specific numerical value is measured through the relative displacement of the fixed grid 6 and the movable grid 8.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. Non-rigid connection's high accuracy displacement measurement device of quick drive, including support (1), its characterized in that: the measuring device is characterized by further comprising a threaded pipe (18), a threaded column (15) and a measuring anvil (2), wherein threads are arranged in the threaded pipe (18) and are matched with the threads arranged outside the threaded column (15), a measuring shaft, an elastic element and a measuring element used for measuring displacement of the measuring shaft are arranged in the support (1), one end of the measuring shaft is a measuring head, the measuring head is matched with the measuring anvil (2), the measuring shaft is connected with the threaded column (15), the threaded column (15) only has freedom degree in the axial direction under the action of a guide mechanism, the measuring shaft is connected with the support (1) through a linear guide rail, one end of the elastic element is connected with the support (1), the other end of the elastic element is connected with the measuring shaft, and the elastic element applies restoring force to the measuring shaft in the.

2. The non-rigidly connected fast-actuation high-precision displacement measuring device of claim 1, wherein: the measuring shaft comprises a measuring rod (5) and an anti-rotation rod (12), the measuring rod (5) is connected with a threaded column (15) through the anti-rotation rod (12), the anti-rotation rod (12) is connected with a support (1) through a linear guide rail, the non-measuring head end of the measuring rod (5) is connected with one end of the anti-rotation rod (12) through a non-rigid connecting portion, and after the non-rigid connecting portion is connected, the measuring rod (5) and the anti-rotation rod (12) have mutual degrees of freedom in the radial direction and the axial direction.

3. The non-rigidly connected fast-actuation high-precision displacement measuring device of claim 2, wherein: measuring staff (5) and the link of preventing commentaries on classics pole (12) are equipped with breach (27), prevent changeing the link of pole (12) and measuring staff (5) be equipped with breach (27) complex lug (28), non-rigid connecting portion include lug (28) and breach (27), lug (28) include with prevent connecting portion (29) that commentaries on classics pole (12) are connected and block portion (30) of being connected with connecting portion (29), the orthographic projection area of block portion (30) is greater than the orthographic projection area of connecting portion (29), when lug (28) and the geometric centre coincidence of breach (27), the outer wall and breach (27) inner wall of lug (28) all do not contact.

4. The non-rigidly connected fast-actuation high-precision displacement measuring device of claim 2, wherein: the non-rigid connecting part is made of flexible materials.

5. The non-rigidly connected fast-actuation high-precision displacement measuring device of claim 2, wherein: support (1) on be equipped with one number and prevent changeing pin (14), be equipped with No. two on screw thread post (15) and prevent changeing pin (19), be equipped with the spout along preventing commentaries on classics pole (12) axis direction on preventing commentaries on classics pole (12), prevent changeing pin (14) and No. two prevent changeing pin (19) with the spout cooperation, and prevent changeing pin (14) and No. two axis equal perpendicular to that prevents changeing pole (12) of preventing changeing pin (19).

6. The non-rigidly connected fast-actuation high-precision displacement measuring device of claim 1, wherein: support (1) inside fixed guide block (23) that is provided with, fixed block (31) that is provided with on the spindle is equipped with guide bar (9) on fixed block (31), the axis of guide bar (9) is perpendicular with the axis of spindle, be equipped with on guide block (23) with guide bar (9) complex guide way, the guide way is parallel with spindle (5) axis.

7. The non-rigidly connected fast-actuation high-precision displacement measuring device of claim 6, wherein: elastic element be extension spring (7), be equipped with extension spring post (24) on guide block (23), be equipped with pulley (26) in support (1), extension spring (7) and pulley (26) cooperation, the one end of extension spring (7) is fixed on extension spring post (24), the other end of extension spring (7) passes pulley (26) after-fixing on guide bar (9), the one end of extension spring (7) is passed through extension spring post (24) and is linked to each other with support (1), the other end of extension spring (7) passes through guide bar (9) and links to each other with the survey axle.

8. The non-rigidly connected fast-actuation high-precision displacement measuring device of claim 1, wherein: the thread column (15) is provided with a shaft hole, the non-measuring head end of the measuring shaft is matched with the shaft hole and penetrates through the shaft hole, the non-measuring head end of the measuring shaft is provided with a limiting part, the cross section area of the limiting part is larger than that of the shaft hole, and the limiting part is used for preventing the measuring shaft from being separated from the shaft hole towards one end of the measured point but can freely move towards the axial direction far away from the measured point.

9. The non-rigidly connected fast-actuation high-precision displacement measuring device of claim 1, wherein: the measuring element is a coding grating which comprises a fixed grating (6) which is relatively static with the support (1) and a movable grating (8) which synchronously acts with the measuring shaft.

10. The non-rigidly connected fast-actuation high-precision displacement measuring device of claim 1, wherein: the anti-rotation device is characterized in that a coaxial shaft cover (11) and an anti-rotation sleeve (13) are arranged on the support (1), one end of the shaft cover (11) is in threaded connection with the support (1), the other end of the shaft cover (11) is in threaded connection with the anti-rotation sleeve (13), the anti-rotation rod (12) is arranged inside the shaft cover (11) and the anti-rotation sleeve (13), the shaft cover (11) and the anti-rotation sleeve (13) are arranged inside the threaded pipe (18), a first limiting block (33) is arranged on the inner wall of the threaded pipe (18), a second limiting block (34) matched with the first limiting block (33) is arranged on the outer wall of the anti-rotation sleeve (13), a wrench seat (22) is further arranged on the support (1), a wrench (20) is hinged to the wrench seat (22), the wrench (20) is matched with the edge of the threaded pipe (18), and the wrench (20) is used for pushing the threaded pipe (18) to.