CN209927032U - Flexible shaft measuring instrument - Google Patents

Abstract

The utility model discloses a flexible shaft measuring instrument, including base framework, basic installation framework, driven top part, measurement component, top subassembly, blotter and cantilever display subassembly down, be equipped with basic installation framework on the base framework, be equipped with driven top part on the basic installation framework, still install measurement component on the basic installation framework, still be equipped with top subassembly down on the base framework, be equipped with the blotter between basic installation framework and the top subassembly down, the outside top of base framework is equipped with cantilever display subassembly. Adopt above-mentioned technical scheme to make a high and efficient flexible axle volume appearance of precision. The flexible shaft measuring instrument is suitable for measuring various irregular shaft parts, such as crankshafts, camshafts and other various irregular shafts. The measuring accuracy is high, the speed is high, and the efficiency and the accuracy are greatly improved.

Description

Flexible shaft measuring instrument

Technical Field

The utility model relates to a detection device field, in particular to flexible axle volume appearance.

Background

The shaft parts are very important parts in the automobile industry and other mechanical industries, and have high precision requirements, high coaxial requirements and high phase angle requirements. The detection method of the shaft parts in the current market mainly comprises the following steps:

1, a universal detection method of three coordinates: can solve the problems of diameter, coaxiality and roundness of shaft parts,

cylindricity, phase angle, etc. The advantages are good flexibility and general precision (unless very good high precision three-coordinate); the defect is that the speed is slow, and a common factory can only use three coordinates as a sampling inspection.

2, detection method of American ADCOLE shaft type measuring instrument or Germany HOMEL shaft type measuring instrument:

the measuring method of the measuring instrument is that the tip holes of the workpiece are positioned by the tips at two ends, and a measuring head measures the size of each shaft neck along the radial direction. The advantages are that: accurate measurement of roundness, cylindricity and phase angle, but expensive. The disadvantages are that: the diameter measurement precision is not enough (single measuring head), the requirement on the mechanical precision of the tip is very high (the jump amount of 0.001mm must be reached), and the tip can only be used in a detection chamber, and the price is high. At least between 20 and 100 million dollars. For decades, there was no price reduction. The domestic market for such meters is basically monopolized by the united states and germany.

The special detection method comprises the following steps: such measurement is an on-line measurement method that is independently designed from a single piece of a workpiece. Its advantages are high beat speed and zero calibration. The disadvantages are that: the flexibility is poor, and each product is replaced, so that a great deal of time and money are required to be invested for modification before the product can be used. Only a large number of individual products can be used.

Therefore, a flexible shaft measuring instrument with high precision and high efficiency is urgently needed. The method can accurately measure key parameters of the shafts such as diameter, roundness, cylindricity, phase angle, coaxiality, eccentricity and the like, and can also realize on-line measurement when the shaft moves to a workshop.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a high and efficient flexible axle volume appearance of precision has especially solved the more accurate problem of diameter measurement.

The utility model provides a flexible shaft measurement appearance, including base framework, basic installation framework, driven top part, measurement element, lower top subassembly, blotter and cantilever display subassembly, be equipped with basic installation framework on the base framework, be equipped with driven top part on the basic installation framework, still install measurement element on the basic installation framework, still be equipped with down top subassembly on the base framework, be equipped with the blotter between basic installation framework and the lower top subassembly, the outside top of base framework is equipped with cantilever display subassembly.

In the above scheme, the base framework comprises an external frame, a caster adjusting block and an electric cabinet, the caster adjusting block is arranged below the external frame, and the electric cabinet is arranged behind the basic installation framework.

In the above scheme, basic installation framework includes main erection support, lead screw undersetting mounting panel, sprocket part, goes up counter weight component, lower counter weight component, shell, tow chain support, tow chain, servo motor, shaft coupling, motor mount pad, first sensor and first guide rail, be equipped with lead screw undersetting mounting panel on the main erection support, be equipped with sprocket part on the lead screw undersetting mounting panel, be equipped with counter weight component and lower counter weight component on the sprocket part, be equipped with the shell on the main erection support, even there is the tow chain support on the shell, tow chain leg joint tow chain, still be equipped with servo motor in the basic installation framework, servo motor connects the shaft coupling, servo motor locates on the motor mount pad, servo motor still is connected with first sensor, be equipped with first guide rail on the shell.

In the scheme, the driven centre part comprises a driven centre body, a pressure spring, an elbow clamp gasket, an elbow clamp assembly, an elbow clamp pulling plate, an upper centre handle, a clamping assembly, a sliding plate, a handle mounting plate, a handle connecting piece and a limiting assembly, the driven centre body is connected with a pressure spring, the pressure spring is connected with an elbow clamp, an elbow clamp gasket is arranged between the pressure spring and the elbow clamp, an elbow clamp assembly is arranged in the pressure spring, an elbow clamp pulling plate is arranged between the elbow clamp assembly and the pressure spring, upper centre handles are arranged on two sides of the driven centre body, the upper part of the driven centre part is also provided with a clamping component, the interior of the driven centre part is provided with a sliding plate, the sliding plate is connected with the handle mounting plate, a handle connecting piece is arranged on the handle mounting plate, the handle connecting piece is connected with an upper tip handle, and the handle mounting plate is connected with the limiting assembly.

In the scheme, the driven centre body comprises an adjusting base, a second guide rail, a mounting plate, an upper centre, a first centre seat, a first pressing sleeve, a first centripetal ball bearing and a first gasket, the second guide rail is arranged on the adjusting base, the mounting plate is arranged on the second guide rail, the upper centre is arranged on the mounting plate, the first centre is arranged in the upper centre, the first centre seat is arranged outside the upper centre, the first pressing sleeve is arranged between the upper centre and the first centre seat, the first centripetal ball bearing is arranged at the tail of the first centre seat, and the first centripetal ball bearing is connected with the first gasket.

In the above scheme, the measuring part comprises a mounting base, a measuring component cover, a mounting bracket, a placing plate, a stay wire guide wheel component, a sensing block, a measuring head, a scale, a measuring motor component, a second sensor, a right-angle joint, a sensor bracket, a measuring position mounting plate, a tow chain mounting plate, a measuring station counterweight cover and a measuring counterweight guide, wherein the mounting base is provided with two measuring components, the measuring components comprise a left measuring component and a right measuring component, the measuring component is provided with a measuring component cover, the measuring component is connected with the mounting base through the mounting bracket, the mounting bracket is provided with the placing plate, the placing plate is provided with the stay wire guide wheel component and the sensing block, the mounting bracket is also provided with the measuring head, the measuring head is provided with the scale, the measuring head is connected with the measuring motor component, and the measuring motor component is provided with the second, the measuring device is characterized in that a right-angle joint is arranged on the second sensor, a sensor support is arranged on the mounting seat, the second sensor is arranged on the sensor support, a measuring position mounting plate and a drag chain mounting plate are further arranged on the mounting seat, a measuring station counterweight housing is arranged in the measuring component housing, and a measuring counterweight guide is arranged in the measuring station counterweight housing.

In the scheme, the lower center assembly comprises a lower center support, a second center seat, a lower center, a second pressing sleeve, a second center ball bearing, a second gasket, an encoder mounting seat, a rotary encoder, a synchronous belt wheel, a synchronous belt, a driving assembly and a lower center driving adjusting block, the lower center support is provided with the second center seat, the second center seat is internally provided with the lower center, the second pressing sleeve is arranged between the lower center and the second center seat, the lower center is internally provided with the second center, the second center ball bearing is arranged below the lower center support, the second center ball bearing is connected with the second gasket, the lower center support is connected with the encoder mounting seat, the encoder mounting seat is connected with the rotary encoder, the encoder mounting seat is internally provided with the synchronous belt wheel, the synchronous belt wheel is connected with the synchronous belt, and the synchronous belt is connected with the driving assembly, the driving assembly is connected with the lower tip driving adjusting block.

In the above scheme, cantilever display subassembly includes display shell, display screen, button, keyboard support, keyboard layer board, keyboard, hinge seat and filter screen, be equipped with the display screen on the display shell, the display screen has the button, the display shell has keyboard support, be equipped with the keyboard layer board in the keyboard support, be equipped with the keyboard in the keyboard layer board, still be equipped with the hinge seat on the display shell, the hinge seat is connected with the base framework, the back of display shell is equipped with the filter screen.

The utility model has the advantages and the beneficial effects that: the utility model provides a high and efficient flexible axle appearance of precision. The flexible shaft measuring instrument is suitable for measuring various irregular shaft parts, such as crankshafts, camshafts and other various irregular shafts. The measuring accuracy is high, the speed is high, and the efficiency and the accuracy are greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a first schematic structural diagram of the present invention;

FIG. 2 is a second schematic structural view of the present invention;

FIG. 3 is a first schematic structural view of a base mounting frame;

FIG. 4 is a second schematic structural view of the base mounting frame;

FIG. 5 is a third schematic structural view of the basic mounting frame;

figure 6 is a schematic view of the construction of the driven tip part;

FIG. 7 is a cross-sectional view taken along plane A-A of FIG. 6;

fig. 8 is a schematic structural view of the driven center body;

FIG. 9 is a cross-sectional view taken along plane A-A of FIG. 8;

FIG. 10 is a first schematic structural view of a measurement component;

FIG. 11 is a second schematic structural view of a measurement component;

fig. 12 is a schematic structural view of the lower tip assembly;

FIG. 13 is a cross-sectional view taken along plane A-A of FIG. 12;

FIG. 14 is a first schematic view of a cantilever display assembly;

FIG. 15 is a second schematic structural diagram of a cantilever display assembly.

In the figure: 1. the device comprises a base framework 2, a base mounting framework 3, a driven centre part 4, a measuring part 5, a lower centre assembly 6, a buffer pad 7, a cantilever display assembly 101, an outer framework 102, a caster adjusting block 103, a motor cabinet 201, a main mounting support 202, a lead screw lower support mounting plate 203, a chain wheel part 204, an upper counterweight assembly 205, a lower counterweight assembly 206, a shell 207, a drag chain support 208, a drag chain 209, a servo motor 210, a coupler 211, a motor mounting support 212, a first sensor 213, a first guide rail 301, a driven centre body 302, a pressure spring 303, an elbow clamp 304, an elbow clamp pad 305, an elbow clamp assembly 306, an elbow clamp pull plate 307, an upper centre handle 308, a clamping assembly 309, a sliding plate 310, a handle mounting plate 311, a handle connecting part 312, a limiting assembly 3011, an adjusting base 3012, A second guide rail 3013, a mounting plate 3014, an upper tip 3015, a first tip 3016, a first tip seat 3017, a first hold-down sleeve 3018, a first centripetal ball bearing 3019, a first spacer 401, a mounting plate 402, a measurement component 403, a measurement component housing 404, a mounting bracket 405, a placement plate 406, a wire guide wheel assembly 407, a sensing block 408, a gauge head 409, a scale 410, a measurement motor assembly 411, a second sensor 412, a right angle joint 413, a sensor bracket 414, a measurement position mounting plate 415, a tow chain mounting plate 416, a measurement station counterweight housing 417, a measurement counterweight guide 501, a lower tip seat 502, a second tip seat 503, a lower tip 504, a second hold-down sleeve 505, a second tip 506, a second centripetal ball bearing 507, a second spacer 508, an encoder mounting seat 509, a rotary encoder 510, a rotary encoder, and a computer program, Synchronous pulley 511, synchronous belt 512, driving component 513, lower tip driving adjusting block 701, display housing 702, display screen 703, button 704, keyboard support 705, keyboard supporting plate 706, keyboard 707, hinge base 708, filter screen

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 and 2, the utility model relates to a flexible shaft measurement appearance, including base framework 1, basic installation framework 2, driven top part 3, measuring unit 4, lower top subassembly 5, blotter 6 and cantilever display subassembly 7, be equipped with basic installation framework 2 on the base framework 1, be equipped with driven top part 3 on the basic installation framework 2, still install measuring unit 4 on the basic installation framework 2, still be equipped with lower top subassembly 5 on the base framework 1, be equipped with blotter 6 between basic installation framework 2 and the lower top subassembly 5, the outside top of base framework 1 is equipped with cantilever display subassembly 7.

The base frame 1 comprises an external frame 101, a caster adjusting block 102 and a motor cabinet 103, wherein the caster adjusting block 102 is arranged below the external frame 101, and the motor cabinet 103 is arranged behind the base installation frame 2. A computer processor and a motor are provided in the outer frame 101, and are connected to the moving parts of the flexible axis measuring instrument to control the movements of the parts. The entire flexible axle gauge is balanced by adjusting the caster adjustment block 102.

As shown in fig. 3, 4 and 5, the base mounting frame 2 includes a main mounting support 201, a lower screw support mounting plate 202, a sprocket component 203, an upper counterweight component 204, a lower counterweight component 205, a housing 206, a drag chain bracket 207, a drag chain 208, a servo motor 209, a coupler 210, a motor mounting seat 211, a first sensor 212 and a first guide rail 213, the lower screw support mounting plate 202 is disposed on the main mounting support 201, the sprocket component 203 is disposed on the lower screw support mounting plate 202, the upper counterweight component 204 and the lower counterweight component 205 are disposed on the sprocket component 203, the housing 206 is disposed on the main mounting support 201, the drag chain bracket 207 is connected to the housing 206, the drag chain bracket 207 is connected to the drag chain 208, the servo motor 209 is further disposed in the base mounting frame 2, the servo motor 209 is connected to the coupler 210, the servo motor 209 is disposed on the motor mounting seat 211, the servo motor 209 is further connected to the first sensor 212, the housing 206 is provided with a first guide 213. The basic mounting framework 2 is connected with the driven centre part 3 and the lower centre part 5, the driven centre part 3 and the lower centre part 5 are moved through the movement of the drag chain 208, and the shaft workpiece to be measured is tightly and reasonably controlled within the measuring range of the measuring part 4.

As shown in fig. 6 and 7, the driven centre part 3 includes a driven centre body 301, a pressure spring 302, an elbow clamp 303, an elbow clamp pad 304, an elbow clamp assembly 305, an elbow clamp pulling plate 306, an upper centre handle 307, a clamping assembly 308, a sliding plate 309, a handle mounting plate 310, a handle connecting piece 311 and a limiting assembly 312, the driven centre body 301 is connected with the pressure spring 302, the pressure spring 302 is connected with the elbow clamp 303, the elbow clamp pad 304 is arranged between the pressure spring 302 and the elbow clamp 303, the elbow clamp assembly 305 is arranged in the pressure spring 302, the elbow clamp pulling plate 306 is arranged between the elbow clamp assembly 305 and the pressure spring 302, the upper centre handles 307 are arranged on both sides of the driven centre body 301, the clamping assembly 308 is further arranged on the upper part of the driven centre part 3, the sliding plate 309 is arranged inside the driven centre part 3, the sliding plate 309 is connected with the handle mounting plate 310, a handle connecting piece 311 is arranged on the handle mounting plate 310, the, the handle mounting plate 311 is connected to a stop assembly 312. The upper part of the shaft workpiece to be measured can be better fixed by the upper center through the matching of the elbow clamp 303 and the pressure spring 302.

As shown in fig. 8 and 9, the driven center body 301 includes an adjustment base 3011, a second guide rail 3012, a mounting plate 3013, an upper center 3014, a first center 3015, a first center seat 3016, a first pressing sleeve 3017, a first center ball bearing 3018 and a first spacer 3019, the adjustment base 3011 is provided with the second guide rail 3012, the second guide rail 3012 is provided with the mounting plate 3013, the mounting plate 3013 is provided with the upper center 3014, the upper center 3014 is provided with the first center 3015, the upper center 3014 is provided with the first center seat 3016, a first pressing sleeve 3017 is provided between the upper center 3014 and the first center seat 3016, the tail of the first center seat 3016 is provided with the first center ball bearing 3018, and the first center ball bearing 3018 is connected to the first spacer 3019.

As shown in fig. 10 and 11, the measuring part 4 includes a mounting base 401, a measuring component 402, a measuring component cover 403, a mounting bracket 404, a placing plate 405, a guy wire guide wheel component 406, a sensing block 407, a measuring head 408, a scale 409, a measuring motor component 410, a second sensor 411, a right-angle joint 412, a sensor bracket 413, a measuring position mounting plate 414, a drag chain mounting plate 415, a measuring station counterweight cover 416 and a measuring counterweight guide 417, two measuring components 402, namely a left measuring component and a right measuring component, are arranged on the mounting base 401, the measuring component cover 403 is arranged on the measuring component 402, the measuring component 402 is connected with the mounting base 401 through the mounting bracket 404, the placing plate 405 is arranged on the mounting bracket 404, the guy wire guide wheel component 406 and the sensing block 407 are arranged on the placing plate 405, the measuring head 408 is further arranged on the mounting bracket 404, the scale 409 is arranged on the measuring head 408, the measuring head 408, the measuring motor component 410 is provided with a second sensor 411, the second sensor 411 is provided with a right-angle joint 412, the mounting seat 401 is provided with a sensor support 413, the sensor support 413 is provided with a second sensor 411, the mounting seat 401 is further provided with a measuring position mounting plate 414 and a drag chain mounting plate 415, the measuring component housing 403 is internally provided with a measuring station counterweight housing 416, and the measuring station counterweight housing 416 is internally provided with a measuring counterweight guide 417. The measuring unit 4 is the most core precision unit, the measuring head 408 is used to measure various items of data, and the sensing block 407 is used to sense operations and determine where the measuring head 408 measures. The measurement weight guide 417 serves to balance the force of the probe 408.

As shown in fig. 12 and 13, the lower center assembly 5 includes a lower center support 501, a second center seat 502, a lower center 503, a second pressing sleeve 504, a second center 505, a second center ball bearing 506, a second gasket 507, an encoder mounting seat 508, a rotary encoder 509, a synchronous pulley 510, a synchronous belt 511, a driving assembly 512 and a lower center driving adjusting block 513, the second center seat 502 is disposed on the lower center support 501, the lower center 503 is disposed in the second center seat 502, the second pressing sleeve 504 is disposed between the lower center 503 and the second center seat 502, the second center 505 is disposed in the lower center 503, the second center ball bearing 506 is disposed below the lower center support 501, the second center ball bearing 506 is connected with the second gasket 507, the lower support 501 is connected with the encoder mounting seat 508, the encoder mounting seat 508 is connected with the rotary encoder 509, the synchronous pulley 510 is disposed in the encoder mounting seat 508, the synchronous pulley 510 is connected with the synchronous belt 511, the synchronous belt 511 is connected with a driving assembly 512, and the driving assembly 512 is connected with a lower tip driving adjusting block 513. The lower center 503 is used for better fixing the lower part of the shaft workpiece to be measured, and the shaft workpiece to be measured is clamped by matching with the driven center part 3 and can be driven to rotate. The rotary encoder 509 is used for rotational positioning, and is a kind of angular positioning of the grating ruler.

As shown in fig. 14 and 15, the cantilever display assembly 7 includes a display housing 701, a display screen 702, a button 703, a keyboard support 704, a keyboard support plate 705, a keyboard 706, a hinge seat 707 and a filter screen 708, the display housing 701 is provided with the display screen 702, the button 703 is arranged under the display screen 702, the keyboard support 704 is arranged under the display housing 701, the keyboard support plate 705 is arranged in the keyboard support 704, the keyboard 706 is arranged in the keyboard support plate 705, the display housing 701 is further provided with the hinge seat 707, the hinge seat 707 is connected with the base frame 1, and the filter screen 708 is arranged on the back of the display housing 701. The cantilever display component 7 is connected with the computer processor, and is arranged at a height equal to that of a person, so that the operation is convenient.

The basic principle is as follows: the workpiece is positioned by the center holes at two ends, the high-precision turntable is used for driving the grating ruler sensor, and the large-range grating ruler measurement sliding table is radially symmetrical left and right. And then, the diameter, the roundness, the cylindricity, the coaxiality, the phase angle, the eccentricity (such as crankshaft stroke), the parameters of the cam lift molded line and the like of each journal are measured in a numerical control manner.

The problem to be solved is as follows: because 2 or so wide-range measuring sensors are adopted, the problem that the diameter measuring precision is not high in the existing market is solved, and the problem of precision loss caused by the jumping of the center hole is solved. And the left and right sensors can be simultaneously superposed with more sensors, thereby solving the problem that the measuring beat of the existing market axial flow meter is too slow.

When the measuring device is used, a shaft workpiece to be measured is arranged between the driven tip part and the lower tip part, the driven tip part and the lower tip part are automatically adjusted, aligned and fixed, the measuring part is driven through display screen operation, the left measuring head and the right measuring head are placed on the shaft workpiece to be measured from top to bottom for detection, and after one point is measured, the basic mounting framework drives the two measuring heads to move to the next point to be measured for measurement. The points to be measured and detected can be set in advance, and the result obtained by the automatic measurement of the measuring head can be displayed on a display screen through a computer processor. And (5) returning the machine after all the detection is finished.

The parameters that can be measured are: diameter, roundness, cylindricity, coaxiality, and run out, stroke, angle. The radial range of the parameters can reach 0-200mm, the length direction is 0-600mm, the resolution can reach 0.0001mm, and the measurement precision is 1+0.8/100 mm.

The manufacturing cost is reduced: from the effect of research and development at present, the price of the device to be put on the market is expected to be about half of the price of the similar device imported at present.

The market prospect is as follows: the domestic automobile industry has huge market, and in addition to the large demand of the aftermarket, the measuring instrument provided by the invention has the market demand of 30-50 meters every year. The method can accurately measure key parameters of the shafts such as diameter, roundness, cylindricity, phase angle, coaxiality, eccentricity and the like, and can also realize moving to a workshop to realize an online measuring method. Meanwhile, the monopoly of foreign shaft detection equipment in our domestic market can be broken, and the domestic blank is filled. The flexible measuring equipment with high efficiency and high precision is provided for customers, and simultaneously, a large amount of capital investment can be saved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The flexible shaft measuring instrument is characterized by comprising a base framework, a basic mounting framework, a driven tip part, a measuring part, a lower tip component, a cushion pad and a cantilever display component, wherein the basic mounting framework is arranged on the base framework, the driven tip part is arranged on the basic mounting framework, the measuring part is further arranged on the basic mounting framework, the lower tip component is further arranged on the base framework, the cushion pad is arranged between the basic mounting framework and the lower tip component, and the cantilever display component is arranged above the outer side of the base framework.

2. The flexible axis meter of claim 1, wherein the base frame comprises an outer frame, a caster adjustment block, and an electrical cabinet, the caster adjustment block being disposed below the outer frame, the electrical cabinet being disposed behind the base mounting frame.

3. The flexible axis measuring instrument according to claim 1, wherein the basic mounting frame comprises a main mounting support, a lower screw support mounting plate, a chain wheel component, an upper counterweight component, a lower counterweight component, a housing, a drag chain support, a drag chain, a servo motor, a coupling, a motor mounting seat, a first sensor and a first guide rail, the lower screw support mounting plate is arranged on the main mounting support, the chain wheel component is arranged on the lower screw support mounting plate, the upper counterweight component and the lower counterweight component are arranged on the chain wheel component, the housing is arranged on the main mounting support, the drag chain support is connected with the drag chain, the servo motor is further arranged in the basic mounting frame and connected with the coupling, the servo motor is arranged on the motor mounting seat, and the servo motor is further connected with the first sensor, the shell is provided with a first guide rail.

4. The flexible axis measuring instrument according to claim 1, wherein the driven center part comprises a driven center body, a pressure spring, an elbow clamp gasket, an elbow clamp assembly, an elbow clamp pulling plate, an upper center handle, a clamping assembly, a sliding plate, a handle mounting plate, a handle connecting piece and a limiting assembly, the driven center body is connected with the pressure spring, the pressure spring is connected with the elbow clamp, the elbow clamp gasket is arranged between the pressure spring and the elbow clamp, the elbow clamp assembly is arranged in the pressure spring, the elbow clamp pulling plate is arranged between the elbow clamp assembly and the pressure spring, the upper center handle is arranged on two sides of the driven center body, the clamping assembly is further arranged on the upper portion of the driven center part, the sliding plate is arranged inside the driven center part and connected with the handle mounting plate, the handle mounting plate is provided with a handle connecting piece, the handle connecting piece is connected with the upper center, the handle mounting plate is connected with the limiting assembly.

5. The flexible shaft measuring instrument according to claim 4, wherein the driven center body comprises an adjusting base, a second guide rail, a mounting plate, an upper center, a first center seat, a first pressing sleeve, a first center ball bearing and a first gasket, the second guide rail is arranged on the adjusting base, the mounting plate is arranged on the second guide rail, the upper center is arranged on the mounting plate, the first center is arranged in the upper center, the first center seat is arranged outside the upper center, the first pressing sleeve is arranged between the upper center and the first center seat, the first center ball bearing is arranged at the tail part of the first center seat, and the first center ball bearing is connected with the first gasket.

6. The flexible axis measuring instrument according to claim 1, wherein the measuring unit includes a mounting base, a measuring unit cover, a mounting bracket, a placement plate, a wire guide wheel unit, a sensing block, a measuring head, a scale, a measuring motor unit, a second sensor, a right angle joint, a sensor bracket, a measuring position mounting plate, a tow chain mounting plate, a measuring station counterweight cover and a measuring counterweight guide, two measuring units are disposed on the mounting base, the measuring units are a left measuring unit and a right measuring unit, the measuring unit cover is disposed on the measuring unit, the measuring unit is connected to the mounting base through the mounting bracket, the placement plate is disposed on the mounting bracket, the wire guide wheel unit and the sensing block are disposed on the placement plate, the measuring head is further disposed on the mounting bracket, and the scale is disposed on the measuring head, the measuring head is connected with the measuring motor assembly, the measuring motor assembly is provided with a second sensor, the second sensor is provided with a right-angle joint, the mounting seat is provided with a sensor support, the sensor support is provided with a second sensor, the mounting seat is further provided with a measuring position mounting plate and a drag chain mounting plate, the measuring assembly housing is internally provided with a measuring station counterweight housing, and the measuring station counterweight housing is internally provided with a measuring counterweight guide.

7. The flexible shaft measuring instrument according to claim 1, wherein the lower center assembly comprises a lower center support, a second center seat, a lower center, a second pressing sleeve, a second center ball bearing, a second gasket, an encoder mounting seat, a rotary encoder, a synchronous pulley, a synchronous belt, a driving assembly and a lower center driving adjusting block, the second center seat is arranged on the lower center support, the lower center is arranged in the second center seat, the second pressing sleeve is arranged between the lower center and the second center seat, the second center is arranged in the lower center, the second center ball bearing is arranged below the lower center support, the second center ball bearing is connected with the second gasket, the lower center support is connected with the encoder mounting seat, the encoder mounting seat is connected with the rotary encoder, the synchronous pulley is arranged in the encoder mounting seat, the synchronous belt wheel is connected with a synchronous belt, the synchronous belt is connected with a driving assembly, and the driving assembly is connected with a lower tip driving adjusting block.

8. The flexible shaft measuring instrument according to claim 1, wherein the cantilever display assembly comprises a display housing, a display screen, buttons, a keyboard support plate, a keyboard, a hinge base and a filter screen, the display screen is arranged on the display housing, the buttons are arranged below the display screen, the keyboard support is arranged below the display housing, the keyboard support plate is arranged in the keyboard support, the keyboard is arranged in the keyboard support plate, the hinge base is further arranged on the display housing, the hinge base is connected with the base framework, and the filter screen is arranged on the back of the display housing.

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