CN215525991U

CN215525991U - Measuring device

Info

Publication number: CN215525991U
Application number: CN202121874508.6U
Authority: CN
Inventors: 袁辉; 姜杨杨; 李悦; 夏元平; 孙福庆
Original assignee: CRRC Qingdao Sifang Co Ltd
Current assignee: CRRC Qingdao Sifang Co Ltd
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2022-01-14
Anticipated expiration: 2031-08-11

Abstract

The utility model provides a measuring device. The measuring device comprises a base, wherein the base is provided with an accommodating cavity; the detection assembly is arranged on the base; the transmission assembly is arranged in the accommodating cavity, the detection assembly is in driving connection with the transmission assembly, and the transmission assembly is provided with a trigger structure; the sensing assembly is installed in the accommodating cavity and comprises a controller and a counting sensor which are electrically connected, and the counting sensor is in induction fit with the trigger structure to detect the movement amount of the transmission assembly. The measuring device provided by the utility model can solve the problem of poor measuring precision of the measuring device in the prior art.

Description

Measuring device

Technical Field

The utility model relates to the related technical field of measuring equipment, in particular to a measuring device.

Background

At present, with the continuous development of the mechanical field, the manufacturing industry is also developing towards precision, and after a plurality of mechanical structural components are manufactured, team operators are generally required to randomly select whether the distance of the pipeline cutting edge after press mounting meets the production requirement according to the requirements of process files so as to ensure that the structural components produced in the same batch have stronger universality.

At present, many installation pipelines comprise stainless steel pipes and cutting sleeves, namely the cutting sleeves are sleeved at the tops of the stainless steel pipes, and the common measuring tools adopted in the current production process are measuring tools such as rulers and vernier calipers.

However, the measurement precision of the existing measurement tool is poor, and the detection efficiency is low due to different proficiency of operators, so that a measurement tool needs to be designed urgently to reduce the artificial measurement deviation, improve the measurement normalization and improve the detection efficiency.

As can be seen from the above, the conventional measuring apparatus has a problem of poor measurement accuracy.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a measuring device to solve the problem that the measuring device in the prior art is poor in measuring accuracy.

In order to achieve the above object, according to one aspect of the present invention, there is provided a measuring apparatus. The measuring device comprises a base, wherein the base is provided with an accommodating cavity; the detection assembly is arranged on the base; the transmission assembly is arranged in the accommodating cavity, the detection assembly is in driving connection with the transmission assembly, and the transmission assembly is provided with a trigger structure; the sensing assembly is installed in the accommodating cavity and comprises a controller and a counting sensor which are electrically connected, and the counting sensor is in induction fit with the trigger structure to detect the movement amount of the transmission assembly.

Furthermore, the base is also provided with a mounting hole communicated with the accommodating cavity, and the detection assembly comprises a clamping cylinder which is mounted on the base; at least one part of the moving piece is accommodated in the clamping cylinder and can move along the axial direction of the clamping cylinder, and at least another part of the moving piece extends into the accommodating cavity through the mounting hole and is in driving connection with the transmission assembly; the elastic part, elastic part telescopically set up in the inside of a calorie section of thick bamboo, and the one end and the moving member of elastic part are connected, and the other end and the calorie section of thick bamboo of elastic part are connected, and the moving member drives the elastic part when moving and stretches out or retract.

Furthermore, the moving part comprises a first moving part which is movably accommodated in the clamping cylinder, the surface of one end, facing the base, of the first moving part is connected with one end of the elastic part, and the other end of the elastic part extends towards the base and is connected with the inner surface of the clamping cylinder; and the first end of the second moving part is connected with the surface of the first moving part facing the base, and the second end of the second moving part extends into the accommodating cavity and is in driving connection with the transmission assembly.

Further, the measuring device further comprises a limiting assembly, the limiting assembly comprises a limiting protrusion and a limiting seat in limiting fit with the limiting protrusion, one of the limiting protrusion and the limiting seat is arranged at the second end of the second moving portion, and the other of the limiting protrusion and the limiting seat is arranged inside the accommodating cavity.

Furthermore, the limiting seat is provided with a limiting groove for accommodating the limiting protrusion and a limiting switch, the limiting switch is installed inside the limiting groove, the limiting switch is electrically connected with the controller, and when the limiting protrusion slides into the limiting groove and contacts with the limiting switch, the limiting switch sends an electric signal to the controller.

Further, a mounting seat is arranged on the base, the mounting seat is accommodated in the accommodating cavity and provided with an installation channel, and the transmission assembly and the sensing assembly are arranged in the installation channel.

Furthermore, the transmission assembly comprises a driving gear, the driving gear is rotatably arranged inside the installation channel, and the driving gear is rotatably connected with the detection assembly; driven gear assembly, driven gear assembly rotationally installs in the inside of installation passageway, and driven gear assembly rotates with the driving gear to be connected, and trigger structure sets up and follows driven gear assembly and rotate on driven gear assembly.

Further, the driven gear assembly comprises a first gear, and the first gear is meshed with the driving gear; the second gear and the first gear are coaxially arranged, the first gear and the second gear synchronously rotate, and the diameter of the second gear is larger than that of the first gear; and the metering gear is meshed with the second gear, and the trigger structure is arranged on the metering gear.

Furthermore, the triggering structure comprises a rotating wheel, the rotating wheel is arranged on the metering gear, and the rotating wheel and the metering gear are coaxially arranged; the trigger block is fixedly installed on the rotating wheel, and the trigger block extends towards the direction far away from the axis of the rotating wheel.

Further, the measuring device also comprises a display assembly, the display assembly is installed on the base, and the display assembly is electrically connected with the controller.

Furthermore, an alarm is arranged on the display component and electrically connected with the controller.

By applying the technical scheme of the utility model, the base is provided with the detection assembly and the transmission assembly which are in driving connection, so that when the detection assembly detects the size of the object to be detected, the object to be detected drives the detection assembly to move, the detection assembly can drive the transmission assembly to move to convert the movement amount of the detection assembly into the movement amount of the transmission assembly, the transmission assembly drives the trigger structure to move in the movement process, the trigger structure can be in induction fit with the induction assembly on the base, and the induction assembly can judge the movement amount of the detection assembly through the movement amount of the trigger structure, so that the size detection of the object to be detected is realized. In the operation process of measuring the size of the object to be measured, the object to be measured only needs to be pressed against the detection assembly, the detection assembly acts and drives the transmission assembly to act, the sensing assembly can judge the size of the object to be measured through the movement amount of the trigger structure, and then the size of the object to be measured is obtained, and the operation is simple; meanwhile, the problem of inaccurate measurement caused by errors of manual operation is avoided, and the detection precision is effectively improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 shows a schematic perspective view of a measuring device according to the utility model; and

FIG. 2 shows a cross-sectional view of a measuring device of the present invention;

FIG. 3 is a schematic perspective view of a base of the present invention without a cover plate thereon;

FIG. 4 shows a perspective view of the mount of the present invention;

FIG. 5 shows a front view of the cartridge of the present invention;

FIG. 6 is a schematic view showing the mounting structure of the first and second gears of the present invention;

FIG. 7 shows a schematic view of the mounting arrangement of the metering gear and trigger arrangement of the present invention.

Wherein the figures include the following reference numerals:

100. a base; 101. an accommodating cavity; 102. mounting holes; 103. an installation port; 104. a charging port; 200. a cover plate; 300. a detection component; 301. clamping the cylinder; 302. a first moving part; 303. a second moving part; 304. an elastic member; 401. a limiting bulge; 402. a limiting seat; 500. a transmission assembly; 501. a driving gear; 502. a first gear; 503. a second gear; 504. a metering gear; 600. a trigger structure; 601. a rotating wheel; 602. a trigger block; 700. a controller; 800. a power source; 900. a counting sensor; 1010. a display component; 1020. and (7) mounting a seat.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the utility model.

The utility model provides a measuring device, aiming at solving the problem that the measuring device in the prior art is poor in measuring precision. The measuring device can be used both in the domestic and industrial sectors.

Specifically, the measuring device is a measuring device for measuring the distance between the press fitting clamping sleeve and the tail end of the pipeline, and the size of the pipeline section can be measured by pressing the pipeline section against the measuring device.

Furthermore, the measuring device can also be used for measuring other objects to be measured which can push the measuring device to move.

As shown in fig. 1, 2 and 3, the measuring device includes a base 100, a detecting component 300, a transmission component 500 and a sensing component, the base 100 has a receiving cavity 101, the detecting component 300 is installed on the base 100, the transmission component 500 is installed inside the receiving cavity 101, the detecting component 300 is in driving connection with the transmission component 500, the transmission component 500 has a triggering structure 600 thereon, the sensing component is installed inside the receiving cavity 101, the sensing component includes a controller 700 and a counting sensor 900 which are electrically connected, and the counting sensor 900 is in sensing cooperation with the triggering structure 600 to detect the moving amount of the transmission component 500.

Specifically, the base 100 is provided with the detection assembly 300 and the transmission assembly 500 which are connected in a driving manner, so that when the detection assembly 300 detects the size of an object to be detected, the object to be detected drives the detection assembly 300 to move, the detection assembly 300 can drive the transmission assembly 500 to move, so that the movement amount of the detection assembly 300 is converted into the movement amount of the transmission assembly 500, the transmission assembly 500 drives the trigger structure 600 to move in the movement engineering, the trigger structure 600 can be in induction fit with the sensing assembly on the base 100, so that the sensing assembly can judge the movement amount of the detection assembly 300 through the movement amount of the trigger structure 600, and the size detection of the object to be detected is realized. In the operation process of measuring the size of the object to be measured, the object to be measured only needs to be pressed against the detection assembly 300, the detection assembly 300 acts and drives the transmission assembly 500 to act, the sensing assembly can judge the size of the object to be measured through the movement amount of the trigger structure 600, and then the size of the object to be measured is obtained, and the operation is simple; meanwhile, the problem of inaccurate measurement caused by errors of manual operation is avoided, and the detection precision is effectively improved.

Further, the base 100 is further provided with an installation opening 103 communicated with the accommodating cavity 101, and the cover plate 200 is detachably installed on the installation opening 103, so that when the transmission assembly 500 and the sensing assembly in the accommodating cavity 101 need to be disassembled and assembled, the cover plate 200 can be detached for operation. Of course, the cover 200 is not limited to be detachably connected, but may also be movably connected to the base 100, for example, the cover 200 is hinged to the base 100, when the inside of the accommodating cavity 101 needs to be operated, the cover 200 is rotated to avoid the installation opening 103, and after the operation is completed, the cover 200 is rotated to block the installation opening 103; the cover plate 200 can also be connected with the base 100 in a sliding manner, when the interior of the accommodating cavity 101 needs to be operated, the cover plate 200 avoids the mounting opening 103 through sliding, and after the operation is completed, the cover plate 200 blocks the mounting opening 103 through sliding.

It should be noted that, a power supply 800 is installed inside the accommodating cavity 101, the power supply 800 is used for supplying power, and a charging port 104 electrically connected with the power supply 800 is further installed on the base 100. The charging port 104 may be a USB charging port, or may be another type of charging port, so as to charge the power supply 800.

In this embodiment, the counter sensor 900 is a correlation type photoelectric sensor, the controller 700 is a single chip microcomputer, and the model of the single chip microcomputer is STM32F103ZET 6.

As shown in fig. 2, the base 100 is further provided with an installation hole 102 communicated with the accommodating cavity 101, the detection assembly 300 includes a card cylinder 301, a moving member and an elastic member 304, the card cylinder 301 is installed on the base 100 to facilitate detection of an object to be detected, at least one part of the moving member is accommodated inside the card cylinder 301, the moving member can move along the axial direction of the card cylinder 301, at least another part of the moving member extends into the accommodating cavity 101 through the installation hole 102 and is in driving connection with the transmission assembly 500, the elastic member 304 is telescopically arranged inside the accommodating cavity 101, one end of the elastic member 304 is connected with the moving member, the other end of the elastic member 304 is connected with the card cylinder 301, and the moving member drives the elastic member 304 to extend or retract when moving.

Specifically, when the object to be measured is measured, the measuring end of the object to be measured pushes against the moving member to move, the moving member pushes against the elastic member 304 to generate displacement, the moving member moves and drives the transmission assembly 500 to move, the transmission assembly 500 drives the trigger structure 600 to move, so that the counting sensor 900 sends a position signal to the controller 700 according to the induction matching with the trigger structure 600, and the controller 700 calculates the size of the object to be measured by judging the movement of the trigger structure 600.

As shown in fig. 2 and 5, the moving member includes a first moving portion 302 and a second moving portion 303, the first moving portion 302 is movably accommodated inside the accommodating cavity 101, a surface of one end of the first moving portion 302 facing the base 100 is connected to one end of the elastic member 304, and another end of the elastic member 304 extends toward the base 100 and is connected to an inner surface of the card cylinder 301; a first end of the second moving portion 303 is connected to a surface of the first moving portion 302 facing the base 100, and a second end of the second moving portion 303 extends into the accommodating cavity 101 and is drivingly connected to the transmission assembly 500.

Specifically, the card cylinder 301 has a sliding channel, the sliding channel is communicated with the mounting hole 102, the first moving portion 302 includes a sliding block, the sliding block is slidably mounted in the sliding channel of the card cylinder 301, and when an object to be measured is measured, the object to be measured pushes the sliding block to slide in the sliding channel; the second moving portion 303 includes a rack, the rack and the slider move synchronously, when the slider slides under the pressure of the object to be tested, the rack follows the slider to move towards the base 100, and the rack can drive the transmission assembly 500 to move.

Further, the first moving portion 302 is not limited to the slider but may be other structures that can slide inside the slide passage, such as a slide plate and the like; similarly, the second moving portion 303 is not limited to a rack, and may be other structures capable of driving the transmission assembly 500 to move.

It should be noted that, a stopping structure is arranged inside the sliding channel, and the stopping structure limits the first moving portion 302, so as to prevent the first moving portion 302 from moving out of the card cylinder 301 from the top opening of the card cylinder 301.

In this embodiment, the elastic element 304 is sleeved on the outer periphery of the second moving portion 303 and is not in contact with the second moving portion 303, so as to prevent the second moving portion 303 from being obstructed from moving when the first moving portion 302 drives the second moving portion 303 to move; meanwhile, the elastic member 304 is spaced from the inner wall surface of the card cylinder 301, so as to prevent the card cylinder 301 from influencing the elastic action of the elastic member 304.

Further, the elastic member 304 includes a spring, and the elastic member 304 may also be an elastic rib.

It should be noted that, when the elastic member 304 is provided in plural, the plural elastic members 304 are not limited to the structure that the plural elastic members are all sleeved on the second moving portion 303, and the plural elastic members 304 may also be the structure that is provided at intervals along the circumferential direction of the second moving portion 303.

In the present embodiment, the elastic member 304 is not limited to being installed between the surface of the first moving portion 302 facing the base 100 and the card cylinder 301 as described above, and the elastic member 304 may also be installed between the surface of the first moving portion 302 facing away from the base 100 and the card cylinder 301.

Specifically, one end of the elastic member 304 is connected to the surface of the first moving portion 302 away from the base 100, and the other end of the elastic member 304 is connected to the card cylinder 301. When the object to be measured performs measurement, the object to be measured presses the first moving portion 302 and drives the first moving portion 302 to move in the sliding channel, and at this time, the first moving portion 302 stretches the elastic member 304.

As shown in fig. 2 and 3, the measuring device further includes a limiting assembly, the limiting assembly includes a limiting protrusion 401 and a limiting seat 402 in limiting fit with the limiting protrusion 401, one of the limiting protrusion 401 and the limiting seat 402 is disposed at the second end of the second moving portion 303, and the other of the limiting protrusion 401 and the limiting seat 402 is disposed inside the accommodating cavity 101.

Specifically, the limiting seat 402 has a limiting groove for accommodating the limiting protrusion 401 and a limiting switch, the limiting switch is installed inside the limiting groove, the limiting switch is electrically connected with the controller 700, and when the limiting protrusion 401 slides into the limiting groove and contacts with the limiting switch, the limiting switch sends an electric signal to the controller 700.

Further, the measuring device is further provided with an alarm, and after the limit switch sends a signal to the controller 700, the controller 700 controls the alarm to alarm so as to remind the first moving part 302 to reach the bottom end of the accommodating cavity 101.

It should be noted that the limit switch is a sensing device, and the model of the limit switch is EE-SX 670.

As shown in fig. 4, a mounting seat 1020 is disposed on the base 100, the mounting seat 1020 is accommodated in the accommodating cavity 101, the mounting seat 1020 has a mounting channel, and the transmission assembly 500 and the sensing assembly are mounted in the mounting channel.

Specifically, the transmission assembly 500 is rotatably installed inside the installation channel, the sensing assembly is installed at the bottom position of the installation seat 1020, and the sensing assembly is in real-time sensing cooperation with the trigger structure 600 to detect the movement amount of the trigger structure 600.

As shown in fig. 2, 6 and 7, the transmission assembly 500 includes a driving gear 501 and a driven gear assembly, the driving gear 501 is rotatably installed inside the installation channel, the driving gear 501 is rotatably connected with the detection assembly 300, the driven gear assembly is rotatably installed inside the installation channel, the driven gear assembly is rotatably connected with the driving gear 501, and the trigger structure 600 is disposed on the driven gear assembly and rotates along with the driven gear assembly.

Specifically, the second removes portion 303 and is connected with the drive gear 501 drive, and the removal of second removal portion 303 can drive the drive gear 501 and rotate, and the drive gear 501 meshes with the driven gear subassembly and drives the driven gear subassembly and rotate, and the driven gear subassembly includes a plurality of gear structure, through setting up drive gear 501 and driven gear subassembly in order to carry out the conversion of drive ratio, improves detection efficiency.

Further, the driven gear assembly comprises a first gear 502, a second gear 503 and a metering gear 504, the first gear 502 is meshed with the driving gear 501, the second gear 503 is coaxially arranged with the first gear 502, the first gear 502 and the second gear 503 rotate synchronously, the diameter of the second gear 503 is larger than that of the first gear 502, the metering gear 504 is meshed with the second gear 503, and the trigger structure 600 is arranged on the metering gear 504.

It should be noted that the gear ratio can be effectively adjusted by arranging the large gear and the small gear with different diameters, and the two gears are respectively meshed with the driving gear 501 and the metering gear 504, so that the concentrated stress can be reduced, and the stability of transmission can be enhanced. Wherein, the diameter and the number of teeth etc. of gear wheel and pinion can purchase the installation according to actual drive ratio demand.

As shown in fig. 7, the trigger structure 600 includes a rotating wheel 601 and a trigger block 602, the rotating wheel 601 is mounted on the metering gear 504, the rotating wheel 601 is coaxially disposed with the metering gear 504, the trigger block 602 is fixedly mounted on the rotating wheel 601, and the trigger block 602 extends toward a direction away from the axial center of the rotating wheel 601.

Specifically, the rotating wheel 601 is mounted on the metering gear 504, the metering gear 504 is meshed with the second gear 503, and the concentrated stress between the metering gear 504 and the second gear 503 can be reduced by meshing the metering gear 504 with the second gear 503, so that the stability of connection is enhanced.

It should be noted that, in the process that the trigger block 602 rotates along with the rotating wheel 601, every time the trigger block 602 passes through the counting sensor 900, the counting sensor 900 sends a voltage trigger signal to the controller 700, and a trigger time represents a rotation of the rotating wheel 601. At this time, the amount of movement of the first moving portion 302 is the product of the circumferential length of the rotating wheel 601 and the number of revolutions.

In this embodiment, the diameter of the driving gear 501 is larger than the diameter of the metering gear 504, so that the driving gear 501 can drive the metering gear 504 to rotate for several circles, thereby avoiding the problem that the metering gear 504 is too large, which causes the moving amount of the first moving portion 302 not to support the metering gear 504 to rotate for an integer number of turns, and the metering is not good.

As shown in fig. 1 and 2, the measuring apparatus further includes a display assembly 1010, the display assembly 1010 is mounted on the base 100, and the display assembly 1010 is electrically connected to the controller 700.

Specifically, the size of the object to be measured can be directly observed through the display assembly 1010 by arranging the display assembly 1010, and the alarm is installed on the display assembly 1010 to facilitate observation.

Further, the display module 1010 includes a display screen and a key, and the display screen reflects the state of the measuring apparatus in real time and displays the size information of the object to be measured.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

1. through being connected detection subassembly 300 with drive assembly 500 drive to make the displacement volume of detection subassembly 300 become drive assembly 500's rotation volume, only need carry out size measurement with determinand roof pressure driving medium when needing to measure, simple structure, convenient operation.

2. The detection function of the counting sensor 900 is used for feeding back and recording the movement amount of the transmission assembly 500, so that the measurement precision is improved.

3. Be provided with display module 1010, display module 1010 can show the dimensional information of determinand in real time, conveniently observes, improves user experience and feels.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A measuring device, comprising:

a base (100), said base (100) having a housing cavity (101);

a detection assembly (300), the detection assembly (300) being mounted on the base (100);

the transmission assembly (500), the transmission assembly (500) is installed inside the accommodating cavity (101), the detection assembly (300) is in driving connection with the transmission assembly (500), and the transmission assembly (500) is provided with a trigger structure (600);

the sensing assembly is installed inside the accommodating cavity (101), the sensing assembly comprises a controller (700) and a counting sensor (900) which are electrically connected, and the counting sensor (900) is in sensing fit with the trigger structure (600) to detect the movement amount of the transmission assembly (500).

2. The measuring device according to claim 1, characterized in that the base (100) is further provided with a mounting hole (102) arranged in communication with the housing cavity (101), and the detecting assembly (300) comprises:

a cartridge (301), the cartridge (301) being mounted on the base (100);

at least one part of the moving part is accommodated in the inner part of the clamping cylinder (301), the moving part can move along the axial direction of the clamping cylinder (301), and at least another part of the moving part extends into the inner part of the accommodating cavity (101) through the mounting hole (102) and is in driving connection with the transmission assembly (500);

the elastic piece (304), the elastic piece (304) is arranged in the clamping cylinder (301) in a telescopic mode, one end of the elastic piece (304) is connected with the moving piece, the other end of the elastic piece (304) is connected with the clamping cylinder (301), and the moving piece drives the elastic piece (304) to stretch out or retract when moving.

3. The measurement device of claim 2, wherein the moving member comprises:

a first moving part (302), wherein the first moving part (302) is movably accommodated in the interior of the card cylinder (301), the surface of the first moving part (302) facing one end of the base (100) is connected with one end of the elastic piece (304), and the other end of the elastic piece (304) extends towards the base (100) and is connected with the inner surface of the card cylinder (301);

a second moving part (303), wherein a first end of the second moving part (303) is connected with the surface of the first moving part (302) facing the base (100), and a second end of the second moving part (303) extends into the accommodating cavity (101) and is in driving connection with the transmission assembly (500).

4. The measuring device according to claim 3, further comprising a limiting assembly, wherein the limiting assembly comprises a limiting protrusion (401) and a limiting seat (402) in limiting fit with the limiting protrusion (401), one of the limiting protrusion (401) and the limiting seat (402) is arranged at the second end of the second moving part (303), and the other of the limiting protrusion (401) and the limiting seat (402) is arranged inside the accommodating cavity (101).

5. The measuring device according to claim 4, wherein the limit seat (402) has a limit groove for receiving the limit protrusion (401) and a limit switch mounted inside the limit groove, the limit switch being electrically connected to the controller (700), the limit switch sending an electrical signal to the controller (700) when the limit protrusion (401) slides inside the limit groove and contacts the limit switch.

6. The measuring device according to claim 1, characterized in that a mounting seat (1020) is provided on the base (100), the mounting seat (1020) being housed inside the housing cavity (101), the mounting seat (1020) having a mounting channel inside which the transmission assembly (500) and the sensing assembly are mounted.

7. The measuring device according to claim 6, wherein the transmission assembly (500) comprises:

the driving gear (501) is rotatably installed inside the installation channel, and the driving gear (501) is rotatably connected with the detection assembly (300);

the driven gear assembly is rotatably installed inside the installation channel and is rotationally connected with the driving gear (501), and the trigger structure (600) is arranged on the driven gear assembly and rotates along with the driven gear assembly.

8. The measuring device of claim 7, wherein the driven gear assembly comprises:

a first gear (502), the first gear (502) meshing with the drive gear (501);

a second gear (503), wherein the second gear (503) is coaxially arranged with the first gear (502), the first gear (502) and the second gear (503) rotate synchronously, and the diameter of the second gear (503) is larger than that of the first gear (502);

a metering gear (504), the metering gear (504) meshing with the second gear (503), the trigger structure (600) being disposed on the metering gear (504).

9. The measurement arrangement according to claim 8, wherein the trigger structure (600) comprises:

the rotating wheel (601), the rotating wheel (601) is installed on the metering gear (504), and the rotating wheel (601) and the metering gear (504) are arranged coaxially;

the trigger block (602), the trigger block (602) is fixed mounting in the directive wheel (601), trigger block (602) towards keep away from the direction extension of directive wheel (601) axle center.

10. The measurement device according to any one of claims 1 to 9, further comprising a display assembly (1010), the display assembly (1010) being mounted on the base (100), and the display assembly (1010) being electrically connected with the controller (700).

11. The measuring device according to claim 10, wherein an alarm is provided on the display assembly (1010), the alarm being electrically connected to the controller (700).