A fast displacement measuring device with adjustable measuring force

Abstract

The application belongs to the technical field of measuring devices, and discloses a quick displacement measuring device capable of adjusting measuring force, which comprises a packaging protective shell, a wire control assembly is installed on the front face of the packaging protective shell, a grating ruler is fixedly installed in the packaging protective shell, a grating ruler seat is slidably connected to the front face of the grating ruler, a measuring shaft mechanism is installed on the front face of the grating ruler seat, and a contact probe is connected to the left end of the measuring shaft mechanism. The grating sensor is used for real-time displacement measurement, and has the advantages of high precision, good repeatability and linear stability. The linear motion track of the measuring shaft mechanism and the contact probe can be matched, so that the grating measurement value is the same as the motion track of the probe, the measurement precision is improved, the initial position of the upper end of the reset spring is adjusted by the external top screw, the squeezing degree of the reset spring when the force limiter swings and triggers the mechanical switch is changed, and the effect of adjusting the contact measurement force is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of measuring devices, and particularly relates to a quick displacement measuring device with adjustable measuring force. BACKGROUND

[0002] Displacement testing is a very important link in engineering structure testing, and through testing the displacement of relevant parts of a structure, stress distribution and internal force of the structure under load can be known, so that the performance and bearing capacity of the structure can be known.

[0003] At present, there are two kinds of traditional contact type displacement automatic measuring devices, one is a manual height gauge, and the other is an electric height gauge. The manual height gauge has fast measuring speed, but cannot realize automatic measurement. The principle of the electric height gauge is mainly as follows: a motor drives a gear to rotate, and the gear drives a rotating wheel to rotate, the rotating wheel is in frictional contact with a steel belt, the rotating wheel drives the steel belt to rotate, the steel belt moves together with a displacement measuring head, when the measuring head moves, software judges whether the measuring head contacts a measured object by the displacement change of the measuring head and the speed change of the motor; when both of them change in a certain time, the measuring head does not contact the measured object; when the measuring head contacts the measured object, the displacement does not change in a certain time, and the steel belt is in frictional contact with the rotating wheel; when the measuring head contacts the measured object, the rotating wheel is in a slipping state, the motor is still rotating, and the software can judge that the measuring head has contacted the measured object, and measurement can be performed. Although the electric height gauge in the prior art can achieve the effect of automatic measurement, the measuring speed is slow, the contact measuring force cannot be adjusted, and the electric height gauge can only be used in the metering industry or quality sampling inspection, and it is difficult to achieve the purpose of rapid measurement, and it is difficult to meet the rapid detection of all products in batch production, so that the detection time is increased, and the work efficiency is reduced.

[0004] Therefore, it is necessary to develop a quick displacement measuring device with adjustable measuring force. SUMMARY

[0005] The application aims to provide a quick displacement measuring device with adjustable measuring force to solve the problems in the background art.

[0006] In order to achieve the above-mentioned purpose, the application provides the following technical scheme: a quick displacement measuring device with adjustable measuring force, comprising a packaging protective shell, a wire control assembly is installed on the front surface of the packaging protective shell, a grating ruler is fixedly installed in the packaging protective shell, a grating ruler seat is slidably connected to the front surface of the grating ruler, a shaft measuring mechanism is installed on the front surface of the grating ruler seat, a contact measuring head is connected to the left end of the shaft measuring mechanism and penetrates through the packaging protective shell, a steel wire pay-off seat is installed on the right side of the shaft measuring mechanism and on the front surface of the grating ruler seat, a force limiter assembly is installed in the packaging protective shell and below the grating ruler seat, and a driving mechanism is installed in the packaging protective shell and on the right side of the grating ruler seat.

[0007] Preferably, the grating ruler bottom is provided with a guide pulley on the left side of the inner cavity of the packaging protective shell, and a transmission steel wire is wound between the guide pulley and the steel wire pay-off seat.

[0008] Preferably, the wire control assembly comprises a packaging plate, the middle part of the packaging plate is provided with a positioning connecting plate, the edge of the packaging plate is provided with a fastening bolt hole, and the packaging plate and the positioning connecting plate are integrally installed on the front surface of the packaging protective shell through the fastening bolt hole.

[0009] Preferably, the shaft measuring mechanism comprises a shaft measuring seat, the shaft measuring seat is installed on the front surface of the grating ruler seat, and one side of the shaft measuring seat is provided with a shaft measuring assembly.

[0010] Preferably, the shaft measuring assembly comprises a shaft, one end of the shaft is inserted into the inside of the shaft measuring seat, the other end of the shaft is provided with a probe positioning hole, the probe positioning hole is sleeved with the outside of the contact probe, and the top of the shaft is inserted with a positioning installation shaft in the inside of the shaft measuring seat.

[0011] Preferably, the bottom of the shaft measuring seat is connected with a guide shaft seat, the outside of the guide shaft seat is sleeved with a guide wheel shaft, the front surface of the shaft measuring seat is provided with two traction wires, and the front surface of the shaft measuring seat is provided with a wire seat plate between the two traction wires.

[0012] Preferably, the force limiter assembly comprises a force limiter, one end of the force limiter is hinged with the inner wall of the packaging protective shell through a connecting shaft, the front surface of the force limiter is clamped with a force limiter contact pulley, and the other end of the force limiter is connected with a return spring.

[0013] Preferably, the bottom of the force limiter contact pulley is in contact with the transmission steel wire, one end of the return spring is hinged with the force limiter, and the other end of the return spring is installed in the inside of the packaging protective shell through a jackscrew.

[0014] Preferably, the driving mechanism comprises a driving motor, the driving motor is installed in the inside of the packaging protective shell, the output shaft of the driving motor is connected with a motor transmission shaft, and the surface of the motor transmission shaft is in contact with the transmission steel wire.

[0015] Preferably, a mechanical switch is installed in the inside of the packaging protective shell above the force limiter and right to the return spring, and the force limiter swings around the connecting shaft under the pressing of the transmission steel wire and finally contacts the mechanical switch.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. The present application has the advantages of high precision, good repeatability and linear stability in real-time displacement measurement by grating sensors, which can be adapted to the linear motion trajectory of the measuring shaft mechanism and the contact probe, thereby ensuring that the grating measurement value is the same as the probe motion trajectory, thereby improving the measurement accuracy, and the initial position of the upper end of the reset spring can be adjusted by the external taper pin to change the squeezing force of the reset spring when the force limiter swings and triggers the mechanical switch, thereby achieving the effect of adjusting the contact measurement force, and in rapid movement measurement, the mechanical limiting method is more rapid and sensitive than the transmission software judgment response, which can be applied to rapid measurement of batch products, effectively improving the work efficiency.

[0018] 2. The present application drives the force limiter assembly as a whole by using the change of the tension of the transmission steel wire to trigger the mechanical switch, thereby achieving the effect of rapid triggering measurement, without the need to judge whether it is in contact by displacement change and motor speed change, and the real-time measurement is more timely and stable, which can be applied to the rapid measurement industry, such as rapid measurement of parts in the production workshop.

[0019] 3. The device of the present application adopts modular design as a whole, which can be installed in any plane, so it can be measured in any direction, while the manual height gauge or electric height gauge in the prior art can only be used in the vertical direction, which greatly limits the application range. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the packaging mechanism of the present application;

[0021] Figure 2 It is a front view structure schematic diagram of the inside of the present application;

[0022] Figure 3 It is a schematic diagram of the grating measurement module of the present application; Figure 2

[0023] Figure 4 It is a schematic diagram of the grating measurement module of the present application;

[0024] Figure 5 It is a three-view diagram of the line control assembly of the present application;

[0025] Figure 6 It is a top view of the measuring shaft mechanism of the present application;

[0026] Figure 7 It is a front view of the measuring shaft mechanism of the present application;

[0027] Figure 8 It is a circuit principle diagram of the trigger switch when the present application is running.

[0028] ​In the diagram: 1. Encapsulated protective shell; 2. Wire control assembly; 21. Encapsulation plate; 22. Positioning connecting plate; 23. Fastening bolt hole; 24. Wire control screen; 3. Grating ruler; 4. Grating ruler base; 5. Axis measuring mechanism; 51. Axis measuring base; 52. Axis measuring assembly; 521. Axis measuring; 522. Probe positioning hole; 523. Positioning mounting shaft; 53. Guide shaft base; 54. Guide wheel shaft; 55. Traction line; 56. Wire base plate; 6. Contact probe; 7. Wire release base; 8. Force limiter assembly; 81. Force limiter; 82. Force limiter contact pulley; 83. Return spring; 84. Connecting shaft; 9. Drive mechanism; 91. Drive motor; 92. Motor drive shaft; 10. Guide pulley; 11. Transmission steel wire; 12. Mechanical switch. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1 to 8 As shown, this embodiment of the invention provides a fast displacement measuring device with adjustable measuring force, including a protective housing 1, a wire control assembly 2 installed on the front of the protective housing 1, a grating ruler 3 fixedly installed inside the protective housing 1, a grating ruler base 4 slidably connected to the front of the grating ruler 3, a measuring axis mechanism 5 installed on the front of the grating ruler base 4, a contact probe 6 connected to the left end of the measuring axis mechanism 5 through the protective housing 1, a wire feeding seat 7 located to the right of the measuring axis mechanism 5 installed on the front of the grating ruler base 4, a force limiter assembly 8 located below the grating ruler base 4 installed inside the protective housing 1, and a drive mechanism 9 located to the right of the grating ruler base 4 installed inside the protective housing 1.

[0031] Displacement measurement is performed in real time using a grating sensor, which has the advantages of high accuracy, good repeatability and linear stability. It can be adapted to the linear motion trajectory of the measuring axis mechanism 5 and the contact probe 6, thereby ensuring that the grating measurement value is the same as the probe motion trajectory, thus improving the measurement accuracy. By adjusting the initial position of the upper end of the return spring 83 by the external set screw, the squeezing force of the return spring 83 when the force limiter 81 swings and triggers the mechanical switch 12 can be changed, thereby achieving the effect of adjusting the magnitude of the contact measurement force.

[0032] like Figure 2 As shown, a guide pulley 10 is installed at the bottom of the grating ruler 3 on the left side of the inner cavity of the encapsulation protective shell 1, and a transmission steel wire 11 is wound between the guide pulley 10 and the steel wire feeding seat 7.

[0033] Through the transmission of the transmission steel wire 11, through the use of the change of the tension of the transmission steel wire 11, the whole movement of the force limiter assembly 8 is driven, so that it triggers the mechanical switch 12, achieves the effect of fast triggering measurement, and does not need to judge whether it is in contact through displacement change and motor speed change, real-time measurement is more timely and stable, and can be applied to the fast measurement industry, such as the fast measurement of parts in the production workshop.

[0034] As shown in Figure 5 The wire control assembly 2 includes an encapsulation plate 21, the middle part of the encapsulation plate 21 is provided with a positioning connecting plate 22, the edge of the encapsulation plate 21 is provided with a fastening bolt hole 23, and the encapsulation plate 21 and the positioning connecting plate 22 are integrally installed on the front face of the encapsulation protective shell 1 through the fastening bolt hole 23. The front face of the encapsulation plate 21 is provided with a wire control screen 24.

[0035] Through the cooperation of the wire control assembly 2 and the fastening bolt hole 23, the encapsulation plate 21 and the positioning connecting plate 22 can be installed on the front face of the encapsulation protective shell 1, and the encapsulation protective shell 1 is encapsulated. Meanwhile, the wire control assembly 2 can be accurately clamped with the encapsulation protective shell 1 by the cooperation of the encapsulation plate 21 and the positioning connecting plate 22, so as to facilitate the reinforcement of the plurality of fastening bolt holes 23.

[0036] As shown in Figure 6 The measuring shaft mechanism 5 includes a measuring shaft seat 51, the measuring shaft seat 51 is installed on the front face of the grating ruler seat 4, and the measuring shaft seat 51 is installed on one side of the measuring shaft seat 51.

[0037] Through the measuring shaft seat 51, the installation of the measuring shaft assembly 52 as a whole is facilitated, and the movement of the measuring shaft assembly 52 is associated with the grating ruler 3, so as to ensure that when the measuring shaft mechanism 5 drives the contact probe 6 to move, the contact probe 6 can be measured in real time by the grating ruler 3.

[0038] As shown in Figure 7 The measuring shaft assembly 52 includes a measuring shaft 521, one end of the measuring shaft 521 is inserted into the inside of the measuring shaft seat 51, the other end of the measuring shaft 521 is provided with a probe positioning hole 522, the probe positioning hole 522 is sleeved on the outside of the contact probe 6, and the top of the measuring shaft 521 is inserted with a positioning installation shaft 523 located in the inside of the measuring shaft seat 51.

[0039] Through the probe positioning hole 522, the contact probe 6 can be installed by the worker, and then through the measuring shaft 521, the measuring shaft seat 51 can drive the contact probe 6 to move, so that the contact probe 6 can finally contact the measured surface. Through the positioning installation shaft 523, the worker can fix and clamp the measuring shaft 521 in the inside of the measuring shaft seat 51, and also facilitate the disassembly of the measuring shaft 521, so as to ensure that the movement of the measuring shaft seat 51 can drive the synchronous movement of the measuring shaft assembly 52.

[0040] As shown in Figure 7As shown, the bottom of the measuring shaft seat 51 is connected with a guide shaft seat 53, the outside of the guide shaft seat 53 is sleeved with a guide wheel shaft 54, the front of the measuring shaft seat 51 is installed with two left and right traction lines 55, and the front of the measuring shaft seat 51 is installed with a line seat plate 56 between the two traction lines 55.

[0041] As shown in the figure, Figure 3 The force limiter assembly 8 includes a force limiter 81, one end of the force limiter 81 is hinged with the inner wall of the packaging protective shell 1 through a connecting shaft 84, the front of the force limiter 81 is clamped with a force limiter contact pulley 82, and the other end of the force limiter 81 is connected with a return spring 83.

[0042] Through the force limiter 81, the transmission steel wire 11 can press the force limiter 81 to move under the cooperation of the connecting shaft 84, and the force limiter 81 can swing around the connecting shaft 84 under the limitation of the connecting shaft 84, thereby ensuring that the force limiter 81 can press the return spring 83 and touch the mechanical switch 12 at the same time when moving.

[0043] As shown in the figure, Figure 3 The bottom of the force limiter contact pulley 82 is in contact with the transmission steel wire 11, one end of the return spring 83 is hinged with the force limiter 81, and the other end of the return spring 83 is installed in the inside of the packaging protective shell 1 through a top wire.

[0044] As shown in the figure, Figure 4 The driving mechanism 9 includes a driving motor 91, the driving motor 91 is installed in the inside of the packaging protective shell 1, the output shaft of the driving motor 91 is connected with a motor transmission shaft 92, and the surface of the motor transmission shaft 92 is in contact with the transmission steel wire 11.

[0045] As shown in the figure, Figure 3 The inside of the packaging protective shell 1 is installed with the mechanical switch 12 above the force limiter 81 and right to the return spring 83, and the force limiter 81 swings around the connecting shaft 84 under the pressing of the transmission steel wire 11 and finally contacts the mechanical switch 12.

[0046] Working principle and use process:

[0047] The application adopts grating sensor real-time displacement measurement, the moving part adopts steel wire transmission mode driving, the opening driving motor 91 can drive the transmission steel wire 11 movement through the motor transmission shaft 92, the movement of the transmission steel wire 11 can drive the grating ruler seat 4 movement along the surface of the grating ruler 3, and the movement of the grating ruler seat 4 can drive the measuring shaft mechanism 5 movement, since the movement of the measuring shaft mechanism 5 can drive the contact probe 6 close to the object to be measured, when the contact probe 6 contacts the measured surface, at this time the grating ruler seat 4 stops movement, but since the driving motor 91 continues to move at this time, the transmission steel wire 11 is continuously driven to stretch through the motor transmission shaft 92, under the tensile force of the transmission steel wire 11, the force limiter 81 can be pressed to move through the force limiter contact pulley 82, so that the force limiter 81 swings around the connecting shaft 84, and the movement of the force limiter 81 can extrude the reset spring 83 to increase the elastic recovery performance, at the same time, the swing of the force limiter 81 can touch the mechanical switch 12, since the touch of the mechanical switch 12 once can respond to a corresponding signal, the contact judgment and the start of measurement reading are realized, and the line control screen 24 is displayed, so that the staff can know in time;

[0048] Since the bottom of the reset spring 83 is connected with the end of the force limiter 81, the initial position of the top of the reset spring 83 is adjusted through the top wire, the extrusion force of the reset spring 83 when the force limiter 81 swings and triggers the mechanical switch 12 can be changed, so that the contact measurement force is adjusted;

[0049] The trigger principle of the mechanical switch 12 during measurement is (as shown in Figure 8 MCU-EN single-chip microcomputer IO port and initial low level, MOTO_EN access driving motor 91 enable end, mechanical switch 2, 3 connection, and 3.3V, MOTO_EN is high level, at this time the driving motor 91 can work normally, when the contact probe 6 contacts the measuring object, the mechanical switch 2, 1 connection, at the same time 2, 3 is disconnected, at this time MOTO_EN grounding is 0V, then the driving motor 91 stops working; Press the measurement completion button, MCU_EN is high level, the driving motor 91 direction is opposite direction movement, run a distance, MCU_EN is low level, the mechanical switch restores 2, 3 connection, 1, 2 is disconnected, completes a measurement process.

[0050] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0051] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, and it is intended that the scope of the application be limited solely by the scope of the appended claims and the equivalents thereof.

Claims

1. A quick displacement measuring device with adjustable measuring force, comprising a package protection shell (1), characterized in that: The front of the packaging protective shell (1) is provided with a wire control assembly (2), the inside of the packaging protective shell (1) is fixedly provided with an optical grating ruler (3), the front of the optical grating ruler (3) is slidably connected with an optical grating ruler seat (4), the front of the optical grating ruler seat (4) is provided with an axis measuring mechanism (5), the left end of the axis measuring mechanism (5) penetrates through the packaging protective shell (1) and is connected with a contact probe (6), the front of the optical grating ruler seat (4) is provided with a steel wire pay-off seat (7) which is located at the right side of the axis measuring mechanism (5), the inside of the packaging protective shell (1) is provided with a force limiter assembly (8) which is located below the optical grating ruler seat (4), the inside of the packaging protective shell (1) is provided with a driving mechanism (9) which is located at the right side of the optical grating ruler seat (4). The force limiter assembly (8) comprises a force limiter (81), one end of the force limiter (81) is hinged to the inner wall of the packaging protective shell (1) through a connecting shaft (84), the front of the force limiter (81) is connected with a force limiter contact pulley (82), the other end of the force limiter (81) is connected with a return spring (83). The bottom of the force limiter contact pulley (82) is in contact with a transmission steel wire (11), one end of the return spring (83) is hinged to the force limiter (81), the other end of the return spring (83) is installed in the inside of the packaging protective shell (1) through a jackscrew. The transmission steel wire (11) can press the force limiter (81) to move under the cooperation of the force limiter (81) and the connecting shaft (84), and the force limiter (81) can swing around the connecting shaft (84) under the limitation of the connecting shaft (84), thereby ensuring that the force limiter (81) can press the return spring (83) and touch the mechanical switch (12) at the same time when moving. The inside of the packaging protective shell (1) is provided with a mechanical switch (12) which is located above the force limiter (81) and at the right side of the return spring (83), the force limiter (81) swings around the connecting shaft (84) under the pressing of the transmission steel wire (11) and finally contacts the mechanical switch (12).

2. A rapid displacement measurement device according to claim 1, wherein: The bottom of the optical grating ruler (3) is provided with a guide pulley (10) which is located at the left side of the inner cavity of the packaging protective shell (1), the transmission steel wire (11) is wound between the guide pulley (10) and the steel wire pay-off seat (7).

3. The apparatus of claim 1, wherein: The wire control assembly (2) comprises a packaging plate (21), the middle part of the packaging plate (21) is provided with a positioning connecting plate (22), the edge of the packaging plate (21) is provided with a fastening bolt hole (23), the packaging plate (21) and the positioning connecting plate (22) are installed on the front of the packaging protective shell (1) as a whole through the fastening bolt hole (23), and the front of the packaging plate (21) is provided with a wire control screen (24).

4. The apparatus of claim 1, wherein: The axis measuring mechanism (5) comprises an axis measuring seat (51), the axis measuring seat (51) is installed on the front of the optical grating ruler seat (4), and one side of the axis measuring seat (51) is provided with an axis measuring assembly (52).

5. A quick displacement measuring device of adjustable measuring force according to claim 4, characterized in that: The measuring shaft assembly (52) comprises a measuring shaft (521), one end of the measuring shaft (521) is inserted into the inside of the measuring shaft seat (51), the other end of the measuring shaft (521) is provided with a probe positioning hole (522), the probe positioning hole (522) is sleeved with the outside of the contact probe (6), and the top of the measuring shaft (521) is inserted into the positioning installation shaft (523) in the inside of the measuring shaft seat (51).

6. A quick displacement measuring device of adjustable measuring force according to claim 4, characterized in that: The bottom of the measuring shaft seat (51) is connected with a guide shaft seat (53), the outside of the guide shaft seat (53) is sleeved with a guide wheel shaft (54), the front surface of the measuring shaft seat (51) is provided with two left and right traction lines (55), and the front surface of the measuring shaft seat (51) is provided with a line seat plate (56) between the two traction lines (55).

7. The apparatus of claim 1, wherein: The driving mechanism (9) comprises a driving motor (91), the driving motor (91) is installed in the inside of the packaging protection shell (1), the output shaft of the driving motor (91) is connected with a motor transmission shaft (92), and the surface of the motor transmission shaft (92) is in contact with the transmission steel wire (11).

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