Spring stiffness coefficient measuring device

Abstract

The utility model relates to the technical field of spring stiffness coefficient detection, in particular to a spring stiffness coefficient measuring device. Comprising a mounting seat, a first suspension part, a harmonic oscillator, a first sliding seat in sliding connection with the mounting seat, an amplitude calibration block fixedly mounted on the first sliding seat, a sensing frame in sliding connection with the amplitude calibration block and a sensor mounted on the sensing frame, the first suspension part is fixedly mounted at the top of the mounting seat, and first scales are arranged on the mounting seat; the first sliding seat is provided with first vernier scales, the sensor is connected with the sensing frame in a sliding mode, the sensor is provided with a sensor sensing opening, and the top face of the amplitude calibration block can abut against the bottom face of the harmonic oscillator. According to the spring stiffness coefficient measuring device, the position of the sensor is moved upwards, so that the sensor can still detect the passing of the harmonic oscillator after the vibration amplitude of the spring is reduced, the measurement error of the vibration period is further reduced, and the calculation precision of the spring stiffness coefficient is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of spring stiffness coefficient detection, more particularly to a spring stiffness coefficient measuring device. BACKGROUND

[0002] Spring stiffness coefficient K value is an important knowledge point in physics, and in physical experiments, the vibration period or elongation of a spring is usually measured by using simple harmonic vibration method or elongation method, and then relevant formula is substituted to calculate the specific value. The process of measuring the spring stiffness coefficient by using simple harmonic vibration method is as follows: one end of the spring is fixed, and the other end is hung with an object with a known mass; the object is made to do simple harmonic vibration, and the vibration period is measured by using a Hall piece; the angular frequency is calculated according to the vibration period; and the spring stiffness coefficient is calculated according to the angular frequency and the mass of the object. The process of measuring the spring stiffness coefficient by using elongation method is as follows: the spring is hung and loaded with a mass; the elongation of the spring is measured; and the stiffness coefficient of the spring is calculated according to the loaded mass and the elongation of the spring.

[0003] However, in actual measurement, it is found that in the process of measuring the stiffness coefficient of the spring by using simple harmonic vibration method, the vibration period of the spring is measured, and since the spring needs to vibrate a large number of times to accurately measure the vibration period of the spring, the elastic force of the spring decreases after a large number of vibrations, so that the vibration amplitude of the spring becomes small. When the vibration amplitude of the spring becomes small, the Hall piece is difficult to sense a number of vibrations in the second half of the spring vibration process when measuring the vibration period of the spring, so that the measured vibration period has a large error, which affects the calculation accuracy of the spring stiffness coefficient. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the deficiency that when the stiffness coefficient is calculated by using simple harmonic vibration method in the prior art, the elastic force of the spring decreases after a large number of vibrations, so that the vibration amplitude of the spring becomes small, and a number of vibrations in the second half of the spring vibration process are difficult to measure, thereby affecting the calculation accuracy of the spring stiffness coefficient, and provides a spring stiffness coefficient measuring device. The spring stiffness coefficient measuring device in the scheme can solve the problem that the elastic force of the spring decreases after a large number of vibrations, so that the measured vibration period has a large error, and improve the measurement accuracy of the spring stiffness coefficient measured by using simple harmonic vibration method.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of:

[0006] The application provides a spring stiffness coefficient measuring device, which comprises a mounting seat, a first suspension part for suspending a spring, a resonator for being suspended at the bottom of the spring, a first sliding seat in sliding connection with the mounting seat, an amplitude calibration block fixedly installed on the first sliding seat, a sensing frame in sliding connection with the amplitude calibration block, and a sensor installed on the sensing frame, wherein the first suspension part is fixedly installed on the top of the mounting seat, the mounting seat is provided with a first scale, the first sliding seat is provided with a first vernier scale, the sensor is in sliding connection with the sensing frame, the sensor is provided with a sensor sensing port, and the top surface of the amplitude calibration block is in abutment with the bottom surface of the resonator.

[0007] When the device is in operation, the spring to be measured is hung on the first suspension part, and then the resonator is hung at the bottom of the spring to be measured. After the spring is fixed on the device, the position of the first sliding seat is adjusted so that the amplitude calibration block on the first sliding seat is in abutment with the resonator, at this time, the top surface of the amplitude calibration block is in abutment with the bottom surface of the resonator, then the position of the sensor on the sensing frame is adjusted so that the sensor sensing port of the sensor is flush with the top surface of the amplitude calibration block, and the position at this time is read according to the first scale and the first vernier scale. Then, the first sliding seat is slid downward by 40 mm according to the experimental requirements, and the sensing frame is slid on the amplitude calibration block according to actual needs, so that the sensor on the sensing frame moves to a suitable position away from the amplitude calibration block, and when the sensing frame and the amplitude calibration block reach a suitable distance, the sensing frame is fixed on the amplitude calibration block. At this time, the sensor is slid upward on the sensing frame to a certain distance, generally 15 mm-25 mm, and the sensor is fixed after being slid upward to the specified position. After the sensor is fixed, the resonator is pulled downward so that the spring is in a stretched state, until the bottom surface of the resonator is again in abutment with the top surface of the amplitude calibration block, and then the resonator is released, and the resonator makes a simple harmonic motion under the driving of the spring. The sensor can measure the time difference between the adjacent two times when the resonator passes through the sensor according to the change of the signal generated by the resonator, and record the total time within the target vibration frequency, and then calculate the average period of each vibration. The sensor can detect whether the resonator passes through by using an optical signal or a laser signal.

[0008] When the spring stiffness coefficient measuring device is used to measure the spring stiffness coefficient by using the simple harmonic vibration method, the position of the sensor is moved upward by the sensing frame, so that when the spring elastic force decreases and the vibration amplitude of the spring decreases, the sensor can still detect the passing of the resonator, the simple harmonic motion of the resonator in the later stage of movement is avoided, the measurement error of the vibration period is reduced, and the calculation accuracy of the spring stiffness coefficient is improved.

[0009] Further, the sensing frame is L-shaped, the amplitude calibration block is in sliding connection with the bottom edge of the sensing frame, and the sensor is in sliding connection with the side edge of the sensing frame. The sensing frame is L-shaped, the sensing frame and the amplitude calibration block form an open upward U-shaped structure, and the sensor is located in the inner cavity of the U-shaped structure.

[0010] Further, the bottom edge of the sensing frame is provided with a first sliding groove, the amplitude calibration block is provided with a first bolt, the first bolt is in threaded connection with the amplitude calibration block through the first sliding groove, and the first bolt is in sliding connection with the first sliding groove; the side edge of the sensing frame is provided with a second sliding groove, the sensor is provided with a second bolt, the second bolt is in threaded connection with the sensor through the second sliding groove, and the second bolt is in sliding connection with the second sliding groove. The connection mode of the bolt facilitates the fixation of the sensing frame on the amplitude calibration block and the fixation of the sensor on the sensing frame.

[0011] Further, the bottom edge of the sensing frame is provided with a first sliding groove, the amplitude calibration block is provided with a first bolt, the first bolt is in threaded connection with the amplitude calibration block through the first sliding groove, and the first bolt is in sliding connection with the first sliding groove;

[0012] Further, the bottom edge of the sensing frame is provided with a first sliding groove, the amplitude calibration block is provided with a first bolt, the first bolt is in threaded connection with the amplitude calibration block through the first sliding groove, and the first bolt is in sliding connection with the first sliding groove;

[0013] The driving part can be a gas cylinder, an electric cylinder, a telescopic rod or a ball screw type structure. When the sensor slides in the second sliding groove under the driving of the driving part, the sensor can be driven upward by the driving part, so that each vibration of the resonator can be monitored by the sensor. The driving part can quickly raise the sensor to a specified position, or can gradually raise the position of the sensor as the amplitude of the resonator decreases.

[0014] Further, the side edge of the sensing frame is further provided with a second scale. When the sensor sensing port of the sensor is flush with the top surface of the amplitude calibration block, the reading of the sensor on the second scale is 0. When the sensor moves upward, the moving distance of the sensor can be quickly judged through the second scale.

[0015] Further, the length of the resonator is 35-40 mm, the resonator is internally provided with a weight-reducing cavity, the bottom of the weight-reducing cavity is in communication with the outside of the resonator, and the top of the resonator is provided with a communication hole in communication with the weight-reducing cavity and the outside of the resonator. Normally, the length of the resonator is about 18 mm and the resonator is a solid workpiece. In the present scheme, the length of the resonator is extended, so that when the sensor monitors whether the resonator is in simple harmonic motion and moves to the position, it can have more sufficient time to obtain the signal, so that the detection result is more accurate. At the same time, on the basis of extending the length of the resonator, the resonator is internally hollow in the present scheme, which can not increase the weight of the resonator, and in addition, the setting of the communication hole on the surface of the resonator can flow out the air flow when the resonator is lowered from the weight-reducing hole, which can reduce the air resistance when the resonator is lowered.

[0016] Further, the first connecting piece is further provided on the top of the mounting seat, the connecting groove is arranged on the first connecting piece, the third bolt and the fourth bolt are slidably connected in the connecting groove, the screw rod of the third bolt is screwed with the top of the mounting seat, and the screw rod of the fourth bolt is screwed with the first hanging part.

[0017] Further, the second hanging part, the tension meter, the pulling part and the vernier are further provided, the second hanging part is fixedly installed on the top of the mounting seat, the pulling part can slide on the mounting seat, and the vernier is aligned with the first scale.

[0018] The spring hung on the second hanging part can measure the stiffness coefficient of the spring by elongation method. When measuring, first, the spring is hung on the second hanging part, and then the tension meter is hung on the bottom of the spring. After the tension meter is hung on the spring, the position of the pulling part is recorded by the first scale and the vernier, the position is recorded, the pulling part pulls the tension meter to move downward, so that the spring is elongated, and the tension displayed on the tension meter at this time is the tension received by the spring when elongated. The tension meter can display the tension, so that the tension of the tension meter can be read in real time. At the same time, the position of the pulling part is recorded by the first scale and the vernier. The stiffness coefficient of the spring is calculated according to the tension and the position change.

[0019] The device of the present scheme can also measure the stiffness coefficient of the spring by the elongation method, and the measurement precision of the spring stiffness coefficient is further improved by using the elongation method again after the spring stiffness coefficient is measured by the simple harmonic vibration method, and the device integrating the simple harmonic vibration method and the elongation method for measuring the spring stiffness coefficient can better meet the needs of teaching experiments for schools and other places with teaching needs. And the tension meter is used instead of the weight, which avoids the corrosion of the weight when holding it by hand and the loss of the weight due to improper storage, thereby affecting the accuracy of the measurement results.

[0020] Further, the pulling part comprises a guide column, a bearing seat, a bearing, a pull rod, a tension nut and a vernier connecting piece, the guide column is fixedly installed on the mounting seat, the bearing seat is installed on the guide column, the bearing is installed in the interior of the bearing seat, the tension nut is fixedly installed on the bearing, one end of the pull rod is threadedly connected with the tension nut through the bearing seat and the bearing, the other end is connected with the tension meter, the vernier connecting piece is fixedly installed on the pull rod, the guide column passes through the vernier connecting piece and is slidably connected with the vernier connecting piece, and the vernier connecting piece is also connected with the vernier scale.

[0021] Before the tension meter is subjected to the tension, it is first zeroed, and after the zeroing of the tension meter is completed, the tension can be applied to the tension meter. When the tension is applied to the tension meter, the tension nut is rotated to enable the pull rod to move downward along the thread, and the downward moving pull rod applies the tension to the tension meter while driving the vernier connecting piece to move downward, and the downward movement of the vernier connecting piece on the guide column drives the vernier scale to slide downward on the mounting seat.

[0022] The rotation of the tension nut is converted into the linear motion of the pull rod through a structure similar to the ball screw, the motion is simple and easy to control, the guide column can further limit the movement direction of the vernier connecting piece, avoid the spring from shaking during the stretching of the spring, and affect the accuracy of the spring stretching length reading, and also avoid the vernier connecting piece from deflecting on the pull rod.

[0023] Further, the guide column has two, two guide columns are respectively located on the two sides of the pull rod, and a second connecting piece fixedly installed on the top of the mounting seat is further included, the second hanging part is fixedly installed on the second connecting piece, one end of the guide column is fixedly connected with the base of the mounting seat, and the other end is fixedly connected with the second connecting piece. The two guide columns not only have a better limiting effect on the vernier connecting piece, but also have a better supporting effect on the second connecting piece, so that the device is more firm as a whole.

[0024] Further, the position of the bearing seat on the guide column is adjustable, the bearing seat is provided with two clamping holes, the two guide columns pass through the two clamping holes respectively, the side wall of the clamping hole is provided with a gap, and the bearing seat is provided with a clamping bolt capable of adjusting the size of the gap. The position of the bearing seat on the guide column is adjustable, and the position of the bearing seat on the guide column can be adjusted according to the actual situation such as the length of the spring.

[0025] Compared with the prior art, the utility model has the advantages that:

[0026] The spring stiffness coefficient measuring device uses the simple harmonic vibration method to measure the spring stiffness coefficient, the position of the sensor is moved upward through the sensing frame, the sensor can still detect the passing of the harmonic oscillator when the spring elastic force decreases and the spring vibration amplitude decreases, the late detection of the simple harmonic motion of the harmonic oscillator is avoided, the measurement error of the vibration period is reduced, and the calculation accuracy of the spring stiffness coefficient is improved.

[0027] The device can also measure the stiffness coefficient of the spring by using the elongation method through the tension meter and the pulling part, and the tension meter is used instead of the weight, so that the corrosion of the weight and the improper storage of the weight are avoided, the weight is not lost, and the accuracy of the measurement result is affected. In addition, the guide column is also used to limit the movement direction of the spring in the scheme, so that the shaking of the spring during the stretching of the spring is avoided, and the accuracy of the reading is affected. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structural schematic view of a spring stiffness coefficient measuring device;

[0029] Figure 2 It is a structural schematic view of a spring stiffness coefficient measuring device Figure 1 It is an enlarged view of A part in the spring stiffness coefficient measuring device;

[0030] Figure 3 It is a connection state schematic view of the amplitude calibration block, the sensing frame and the sensor of the spring stiffness coefficient measuring device;

[0031] Figure 4 It is a connection state schematic view of the amplitude calibration block, the sensing frame and the sensor of the spring stiffness coefficient measuring device from another angle;

[0032] Figure 5 It is a structural schematic view of a harmonic oscillator of a spring stiffness coefficient measuring device;

[0033] Figure 6 It is a structural schematic view of a harmonic oscillator of a spring stiffness coefficient measuring device from another angle;

[0034] Figure 7It is a schematic view of the connection state of the amplitude calibration block, the sensing frame, the driving part and the sensor in the second embodiment of the spring stiffness coefficient measuring device;

[0035] Figure 8 It is a schematic view of the structure of another angle of the spring stiffness coefficient measuring device.

[0036] In the drawings: 1, mounting seat; 2, first suspension part; 3, resonator; 4, first sliding seat; 5, amplitude calibration block; 6, sensing frame; 7, sensor; 701, sensor sensing port; 601, first sliding groove; 602, second sliding groove; 501, first bolt; 702, second bolt; 301, weight reduction cavity; 302, communication hole; 8, first connecting piece; 801, connecting groove; 811, third bolt; 812, fourth bolt; 9, second suspension part; 10, tension meter; 11, vernier; 12, guide column; 13, bearing seat; 14, pull rod; 15, tension nut; 16, vernier connecting piece; 17, second connecting piece; 18, spring; 19, driving part. DETAILED DESCRIPTION

[0037] The utility model will be further described in connection with specific implementation. Among them, the drawings are only for example description, and the representation is only schematic diagram, and cannot be understood as the limitation of the patent; in order to better illustrate the embodiment of the utility model, some components of the drawings will be omitted, enlarged or reduced, and the size of actual product is not represented; for those skilled in the art, some well-known structures and their description in the drawings can be omitted and understood.

[0038] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore the position relationship description in the drawings is only for example description, and cannot be understood as the limitation of the patent, for the ordinary skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0039] Embodiment one

[0040] The embodiment is the first embodiment of the spring stiffness coefficient measuring device, as shown in the drawings, Figures 1-6As shown, it comprises a mounting base 1, a first suspension part 2 with a suspending spring 18, a resonator 3 suspended at the bottom of the spring 18, a first sliding seat 4 in sliding connection with the mounting base 1, an amplitude calibration block 5 fixedly installed on the first sliding seat 4, a sensing frame 6 in sliding connection with the amplitude calibration block 5, and a sensor 7 installed on the sensing frame 6. The first suspension part 2 is fixedly installed on the top of the mounting base 1. The mounting base 1 is provided with a first scale. The first sliding seat 4 is provided with a first vernier scale. The sensor 7 is in sliding connection with the sensing frame 6. The sensor 7 is provided with a sensor sensing port 701. The top surface of the amplitude calibration block 5 can abut against the bottom surface of the resonator 3.

[0041] Specifically, as shown in Figure 3 The sensing frame 6 is L-shaped. The amplitude calibration block 5 is in sliding connection with the bottom edge of the sensing frame 6. The sensor 7 is in sliding connection with the side edge of the sensing frame 6. The bottom edge of the sensing frame 6 is provided with a first sliding groove 601. The amplitude calibration block 5 is provided with a first bolt 501. The first bolt 501 is in threaded connection with the amplitude calibration block 5 through the first sliding groove 601. The first bolt 501 is in sliding connection with the first sliding groove 601. The side edge of the sensing frame 6 is provided with a second sliding groove 602. The sensor 7 is provided with a second bolt 702. The second bolt 702 is in threaded connection with the sensor 7 through the second sliding groove 602. The second bolt 702 is in sliding connection with the second sliding groove 602.

[0042] Specifically, the side edge of the sensing frame 6 is further provided with a second scale.

[0043] Specifically, as shown in Figure 5 and Figure 6 The resonator 3 has a length of 35-40 mm. The resonator 3 is internally provided with a weight-reducing cavity 301. The bottom of the weight-reducing cavity 301 is in communication with the outside of the resonator 3. The top of the resonator 3 is provided with a communication hole 302 in communication with the weight-reducing cavity 301 and the outside of the resonator 3.

[0044] Specifically, it further comprises a first connecting piece 8 located at the top of the mounting base 1. The first connecting piece 8 is provided with a connecting groove 801. A third bolt 811 and a fourth bolt 812 are in sliding connection within the connecting groove 801. The screw rod of the third bolt 811 is in threaded connection with the top of the mounting base 1 through the connecting groove 801. The screw rod of the fourth bolt 812 is in threaded connection with the first suspension part 2 through the connecting groove 801.

[0045] The working principle of the embodiment is as follows:

[0046] The device is used for measuring the spring stiffness coefficient. When the device is in operation, the spring 18 to be measured is hung on the first hanging part 2, and then the resonator 3 is hung on the bottom of the spring 18 to be measured. After the spring 18 is fixed on the device, the position of the first sliding seat 4 is adjusted so that the amplitude calibration block 5 on the first sliding seat 4 is in abutment with the resonator 3, at this time, the top surface of the amplitude calibration block 5 is in abutment with the bottom surface of the resonator 3, and then the position of the sensor 7 on the sensing frame 6 is adjusted so that the sensor sensing port 701 of the sensor 7 is flush with the top surface of the amplitude calibration block 5, and the position at this time is read according to the first scale and the first vernier scale. Then, the first sliding seat 4 is slid downward by 40 mm according to the experimental requirements, and the sensing frame 6 is slid on the amplitude calibration block 5 according to the actual requirements, so that the sensor 7 on the sensing frame 6 moves to a suitable position away from the amplitude calibration block 5, and when the suitable distance between the sensor 7 and the amplitude calibration block 5 is reached, the sensing frame 6 is fixed on the amplitude calibration block 5. At this time, the sensor 7 on the sensing frame 6 is slid upward to a certain distance, and the sliding distance of the sensor 7 is generally 15 mm-25 mm, and the sensor 7 is fixed after being slid upward to the specified position. After the sensor 7 is fixed, the resonator 3 is pulled to move downward, so that the spring 18 is in a stretched state, until the bottom surface of the resonator 3 is in abutment with the top surface of the amplitude calibration block 5 again, and then the resonator 3 is released, and the resonator 3 performs simple harmonic motion under the driving of the spring 18.

[0047] The beneficial effects of the embodiment are as follows:

[0048] When the spring stiffness coefficient measuring device of the embodiment is used to measure the spring stiffness coefficient by using the simple harmonic vibration method, the position of the sensor 7 is moved upward by the sensing frame 6, so that the sensor 7 can still detect the passing of the resonator 3 when the spring elastic force is reduced and the spring vibration amplitude is small, the simple harmonic motion of the resonator 3 in the later stage of movement is avoided, the measurement error of the vibration period is reduced, and the calculation accuracy of the spring stiffness coefficient is improved.

[0049] The sensor 7 and the sensing frame 6 are fixed by the first bolt 501 and the second bolt 702, which is convenient to operate and has high connection strength. The moving distance of the sensor 7 can be quickly judged by the second scale. The first connecting piece 8 can adjust the mounting position of the spring on the mounting seat 1, the mounting angle of the first connecting piece 8 on the mounting seat 1 can be adjusted when the tightness of the bolt is loosened, and the position of the first hanging part 2 on the connecting groove 801 can also be adjusted.

[0050] Embodiment two

[0051] The embodiment is a second embodiment of a spring stiffness coefficient measuring device, which is similar to the first embodiment, and the difference lies in that the driving part 19 for driving the sensor 7 to move is further included.

[0052] Specifically, as Figure 7As shown, the side of the sensing frame 6 is provided with a second sliding groove 602, the sensor 7 is in sliding connection with the second sliding groove 602, the driving end of the driving part 19 is in fixed connection with the sensor 7, and the driving part 19 can drive the sensor 7 to slide in the second sliding groove 602. The driving part 19 is an electric cylinder.

[0053] The working principle of the embodiment is as follows:

[0054] When the sensor 7 can slide in the second sliding groove 602 under the driving of the driving part 19, with the increase of the movement time of the resonator 3, the sensor 7 can be driven by the driving part 19 to gradually move upward, with the decrease of the amplitude of the resonator 3, the sensor 7 is driven by the driving part 19 to move upward, and when the position of the sensor 7 is raised, each vibration of the resonator 3 can be monitored by the sensor 7.

[0055] The other technical features and beneficial effects of the embodiment are the same as those of the first embodiment.

[0056] Embodiment three

[0057] The third embodiment of the spring stiffness coefficient measuring device is shown in the figure, and the third embodiment can also measure the stiffness coefficient of the spring 18 using the tensile method on the basis of the first embodiment and the second embodiment. Figure 8

[0058] Specifically, it further includes a second suspension part 9 capable of suspending the spring 18, a tension meter 10 capable of being suspended at the bottom of the spring 18, a pulling part for pulling the tension meter 10, and a vernier 11 installed on the pulling part, the second suspension part 9 is fixedly installed on the top of the mounting seat 1, the pulling part can slide on the mounting seat 1, and the vernier 11 is aligned with the first scale.

[0059] Specifically, the pulling part includes a guide column 12, a bearing seat 13, a bearing, a pull rod 14, a tension nut 15, and a vernier connecting piece 16, the guide column 12 is fixedly installed on the mounting seat 1, the bearing seat 13 is installed on the guide column 12, the bearing is installed in the interior of the bearing seat 13, the tension nut 15 is fixedly installed on the bearing, one end of the pull rod 14 is in threaded connection with the tension nut 15 through the bearing seat 13 and the bearing, the other end is connected with the tension meter 10, the vernier connecting piece 16 is fixedly installed on the pull rod 14, the guide column 12 passes through the vernier connecting piece 16 and is in sliding connection with the vernier connecting piece 16, the vernier connecting piece 16 is further connected with the vernier 11, and the vernier connecting piece 16 is in the shape of a rod.

[0060] Specifically, the guide column 12 has two, the two guide columns 12 are respectively located on the two sides of the pull rod 14, and the second suspension part 9 is fixedly installed on the second connecting piece fixedly installed on the top of the mounting seat 1, one end of the guide column 12 is in fixed connection with the base of the mounting seat 1, and the other end is in fixed connection with the second connecting piece.

[0061] ​Specifically, the position of the bearing seat 13 on the guide column 12 is adjustable, the bearing seat 13 is provided with two clamping holes, the two guide columns 12 pass through the two clamping holes respectively, the side wall of the clamping hole is provided with a gap, and the bearing seat 13 is provided with a clamping bolt capable of adjusting the size of the gap.

[0062] The working principle or working process of the embodiment is as follows:

[0063] When measuring, first, the spring 18 is hung on the second hanging part 9, and then the tension meter 10 is hung on the bottom of the spring 18. After the tension meter 10 is hung on the spring 18, the position of the pulling part at this time is recorded by the first scale and the vernier 11, the position recording is completed, the pulling part pulls the tension meter 10 to move downward, so that the spring 18 is elongated, and the tension displayed on the tension meter 10 at this time is the tension that the spring 18 is subjected to when elongated. The tension meter 10 capable of displaying the tension can be selected, so as to facilitate real-time reading of the tension of the tension meter 10. At the same time, the position of the pulling part at this time is recorded by the first scale and the vernier 11. The stiffness coefficient of the spring 18 is calculated according to the tension and the position change. When the pulling part applies tension to the tension meter 10, the tension nut 15 is rotated. Since the tension nut 15 is fixed on the bearing, when the tension nut 15 is rotated, the tension nut 15 does not move in the vertical direction, and the tension rod 14 connected with the tension nut 15 by screw threads moves downward along the vertical direction with the rotation of the tension nut. The tension rod 14 moving downward applies tension to the tension meter 10, and also drives the vernier connecting piece 16 to move downward. The downward movement of the vernier connecting piece 16 on the guide column 12 drives the vernier 11 to slide downward on the mounting seat 1.

[0064] The beneficial effects of the embodiment are as follows:

[0065] The embodiment uses the elongation method to measure the stiffness coefficient of the spring 18 through the tension meter 10 and the pulling part, and then uses the simple harmonic vibration method to measure the stiffness coefficient of the spring 18, and then uses the elongation method to measure again, so as to further improve the measurement accuracy of the stiffness coefficient of the spring 18. At the same time, for schools and other places with teaching needs, the device integrating the simple harmonic vibration method and the elongation method to measure the stiffness coefficient of the spring 18 can better meet the needs of teaching experiments. Moreover, the tension meter 10 is used instead of the weight, so as to avoid corrosion of the weight when the weight is held by hand, improper storage of the weight, loss of the weight, and influence on the accuracy of the measurement result. In addition, the guide column 12 is also used to limit the movement direction of the spring in the present scheme, so as to avoid shaking of the spring during stretching of the spring, and to avoid influence on the accuracy of the reading. At the same time, the position of the bearing seat 13 on the guide column 12 is adjustable, and the position of the bearing seat 13 on the guide column 12 can be adjusted according to the actual situation such as the length of the spring 18.

[0066] In the specific contents of the foregoing specific embodiments, each technical feature can be combined arbitrarily without contradiction, and to make the description brief, all possible combinations of the foregoing technical features are not described, however, as long as the combinations of the technical features do not exist contradiction, it should be considered that it is within the scope of the present disclosure.

[0067] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application claims.

Claims

1. A spring rate measuring device, characterized by, The utility model provides a kind of vibration sensor, including mounting seat (1), first suspension (2) of suspending spring (18), resonator (3) can be suspended in the bottom of spring (18), first slide (4) with the mounting seat (1) sliding connection, amplitude calibration block (5) fixedly installed on the first slide (4), sensing frame (6) with the amplitude calibration block (5) sliding connection and sensor (7) installed on the sensing frame (6), the first suspension (2) is fixedly installed on the top of the mounting seat (1), the mounting seat (1) is equipped with first scale, the first slide (4) is equipped with first vernier scale, the sensor (7) is slidably connected with the sensing frame (6), the sensor (7) is equipped with sensor sensing port (701), the top surface of the amplitude calibration block (5) can be abutted with the bottom surface of the resonator (3).

2. A spring rate measuring device according to claim 1, wherein The sensing frame (6) is L-shaped, the amplitude calibration block (5) is slidably connected with the bottom edge of the sensing frame (6), and the sensor (7) is slidably connected with the side edge of the sensing frame (6).

3. A spring rate measuring device according to claim 2, wherein The bottom edge of the sensing frame (6) is provided with a first sliding groove (601), the amplitude calibration block (5) is provided with a first bolt (501), the first bolt (501) is threadedly connected with the amplitude calibration block (5) through the first sliding groove (601), and the first bolt (501) is slidably connected with the first sliding groove (601); the side edge of the sensing frame (6) is provided with a second sliding groove (602), the sensor (7) is provided with a second bolt (702), the second bolt (702) is threadedly connected with the sensor (7) through the second sliding groove (602), and the second bolt (702) is slidably connected with the second sliding groove (602).

4. A spring rate measuring device according to claim 2, wherein The bottom edge of the sensing frame (6) is provided with a first sliding groove (601), the amplitude calibration block (5) is provided with a first bolt (501), the first bolt (501) is threadedly connected with the amplitude calibration block (5) through the first sliding groove (601), and the first bolt (501) is slidably connected with the first sliding groove (601); Further comprising a driving portion (19) mounted on the sensing frame (6), the side edge of the sensing frame (6) is provided with a second sliding groove (602), the sensor (7) is slidably connected with the second sliding groove (602), the driving end of the driving portion (19) is fixedly connected with the sensor (7), and the driving portion (19) can drive the sensor (7) to slide in the second sliding groove (602).

5. A spring rate measuring device according to claim 3 or 4, wherein The side edge of the sensing frame (6) is further provided with a second scale.

6. The spring rate measuring device of claim 1, wherein, The length of the resonator (3) is 35mm-40mm, the resonator (3) is provided with a weight-reducing cavity (301) in the inside, the bottom of the weight-reducing cavity (301) is communicated with the outside of the resonator (3), and the top of the resonator (3) is provided with a communication hole (302) communicating the weight-reducing cavity (301) and the outside of the resonator (3).

7. The spring rate measuring device of claim 1, wherein, The first connecting piece (8) is provided with a connecting groove (801), and a third bolt (811) and a fourth bolt (812) are slidably connected in the connecting groove (801).

8. The spring rate measuring device of claim 1, wherein, The second suspension part (9) is provided with a suspensible spring (18), a tensile meter (10) is suspended at the bottom of the spring (18), a pulling part is used to pull the tensile meter (10), and a vernier scale (11) is installed on the pulling part.

9. A spring rate measuring device according to claim 8, wherein, The pulling part comprises a guide column (12), a bearing seat (13), a bearing, a pulling rod (14), a tensile nut (15) and a vernier connecting piece (16), the guide column (12) is fixedly installed on the mounting seat (1), the bearing seat (13) is installed on the guide column (12), the bearing is installed in the bearing seat (13), the tensile nut (15) is fixedly installed on the bearing, one end of the pulling rod (14) is threadedly connected with the tensile nut (15) through the bearing seat (13) and the bearing, the other end of the pulling rod (14) is connected with the tensile meter (10), the vernier connecting piece (16) is fixedly installed on the pulling rod (14), the guide column (12) passes through the vernier connecting piece (16) and is slidably connected with the vernier connecting piece (16), and the vernier connecting piece (16) is connected with the vernier scale (11).

10. A spring rate measuring device according to claim 9, wherein The guide column (12) has two guide columns (12) which are respectively located on the two sides of the pulling rod (14), a second connecting piece (17) is fixedly installed on the top of the mounting seat (1), the second suspension part (9) is fixedly installed on the second connecting piece (17), one end of the guide column (12) is fixedly connected with the base of the mounting seat (1), and the other end of the guide column (12) is fixedly connected with the second connecting piece (17).

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