Hardness testing equipment for badminton racket rod

Abstract

The invention relates to the technical field of hardness testing, and particularly discloses a badminton racket shaft hardness testing device which comprises a supporting table, a vertical plate, a detection unit, a loading mechanism and a clamping mechanism. The vertical plate is fixed on one side of the support table and is embedded with the detection unit, the top of the vertical plate locks the loading mechanism, and the clamping mechanism is mounted on the other side of the support table. The loading mechanism is used for converting rotary motion into stable and vertical linear loading motion of a pressure head through a transmission system consisting of a motor, a cam piece, an L-shaped pressure rod, a connecting rod and a precise guide pair; the clamping mechanism drives connecting rod amplifying mechanisms which are symmetrically arranged through an air cylinder, so that an upper pressing frame and a lower pressing frame synchronously move to stably clamp the racket handle. A displacement and force sensing module integrated in the detection unit collects data in real time, and an internal data processing module automatically draws a force-displacement curve and calculates a hardness value or an elastic modulus. The device realizes high precision and high efficiency of the hardness test of the racket rod, and has the advantages of high universality, convenience in operation and objective and reliable result.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hardness testing, in particular to a hardness testing device for a badminton racket handle. BACKGROUND

[0002] A badminton racket generally comprises a racket head, a racket handle, a racket grip, and a joint between the racket frame and the racket handle. The length of a racket does not exceed 68 cm, wherein the length of the racket handle and the racket handle does not exceed 42 cm, the length of the racket frame does not exceed 25 cm, and the width is 20 cm. With the development of science and technology, the development of rackets is towards lighter weight, harder frame, better elastic handle, and smaller air resistance.

[0003] At present, the Chinese patent application No. CN201820304165.1 discloses a hardness testing device for a badminton racket handle, which comprises a fixed base, a test main body frame is welded on the top of the fixed base, a deformation drawing board is embedded in the test main body frame, a limiting block is slidably connected to the fixed base on one side of the test main body frame through a sliding limiting block, a racket body is placed in the test main body frame through a racket placing sleeve, a pressure rod is embedded in the center of the top of the test main body frame through a ring sleeve, the pressure rod is connected with the racket body through a ring clamping frame, and a weight frame is welded on the top end of the pressure rod. The deformation curve of the racket can be drawn on the deformation drawing board, and then compared with the original line, so that the hardness of the racket can be tested conveniently, the hardness testing device for the badminton racket handle is more convenient to use, and the quality is improved.

[0004] However, the prior art adopts a static weight loading and manual recording mode of the deformation drawing board, the loading process is not easy to accurately control and is low in efficiency, the clamping mechanism is insufficiently constrained to the racket handle, which easily introduces test errors, and the whole data acquisition and result interpretation process highly depends on manual work, resulting in strong subjectivity of the test results, insufficient accuracy and objectivity. SUMMARY

[0005] The present application aims to provide a hardness testing device for a badminton racket handle to solve the problems in the background art.

[0006] In order to achieve the above object, the present application adopts the following technical scheme: A hardness testing equipment for badminton racket handle, comprising a support, a foot pad, a vertical plate, a detection unit, a loading mechanism and a clamping mechanism, the bottom of the support is fixed with a foot pad at four ends, the top left rear side of the support is fixedly connected with a vertical plate, and the inside of the vertical plate is embedded with a detection unit, the detection unit is built-in with a displacement sensing module, which is used for real-time detection of the deflection deformation of the badminton racket handle under pressure, the top of the vertical plate is locked and fixed with a loading mechanism, the top right front side of the support is provided with a clamping mechanism, the loading mechanism comprises a carrier fastened to the vertical plate at the bottom rear side, the top rear side of the carrier is locked and fixed with a driving structure, the front side of the driving structure is slidably connected with a roller, the roller is rotatably connected to the inside of the top of a pressure rod, and the rear side of the bottom of the pressure rod is rotatably connected to the inside of a pad seat, the bottom of the pad seat is fastened to the carrier, the front of the pressure rod is rotatably connected with a connecting rod, and the bottom of the connecting rod is rotatably connected with a sliding column, the sliding column is slidably arranged in a groove seat, and the bottom end of the sliding column is locked and fixed with a pressure head, the rear of the groove seat is fixed to the carrier, the middle side of the bottom of the pressure rod is connected with a spring, and the bottom end of the spring is connected with the carrier, and the inside of the connection between the pressure head and the sliding column is provided with a force sensing module, which is used for real-time detection of the pressure value applied by the pressure head to the badminton racket handle.

[0007] Preferably, the pressure rod is in L-shaped structure, the two sides of the corner of the L-shaped structure are inserted into the pad seat, and a reinforcing rib is arranged between the two rods of the L-shaped structure, and an arc-shaped groove is formed in the bottom of the pressure head.

[0008] Preferably, the top front side of the carrier is provided with a rectangular slot, the spring is arranged in the rectangular slot, the left and right sides of the sliding column are triangular, and the two triangular shapes are respectively slidably connected with the two V-shaped grooves in the groove seat.

[0009] Preferably, the driving structure comprises a first vertical column and a second vertical column locked and fixed on the top left and right sides of the carrier respectively, the left side of the first vertical column is locked and fixed with a first motor, the right side of the second vertical column is locked and fixed with a second motor, the left output end of the second motor is connected with a lead screw, the outer surface of the lead screw is provided with a thread groove on the left half, the thread groove is threadedly connected with an internal thread sleeve outside, the internal thread sleeve is fixedly wrapped with a displacement block, the inside of the displacement block is rotatably provided with a rotating sleeve at the bottom side, the rotating sleeve is installed with a cam piece at the right side, and the inside of the rotating sleeve and the cam piece is rotatably provided with a shaft, the lead screw is rotatably connected to the inside of the top of the first vertical column and the second vertical column, the shaft is rotatably connected to the inside of the middle of the first vertical column and the second vertical column, the left part of the shaft is connected with the right output end of the first motor, and the front part of the cam piece is in contact with the roller.

[0010] Preferably, the cam member is composed of three disc-shaped cams and connecting components connected between the three disc-shaped cams to form an integral whole, and the roller can be in contact with the three disc-shaped cams in turn by changing the position of the displacement block.

[0011] Preferably, the outer surface of the shaft is transversely provided with a sliding key, the sliding key is inserted into the inside of the rotating sleeve and the cam member, the rear end of the three disc-shaped cams and the connecting components of the cam member are flush, and the connecting components are provided with two connecting components, the front sides of the two connecting components are inclined, and the three disc-shaped cams are matched to smoothly transition the roller between the three disc-shaped cams.

[0012] Preferably, the clamping mechanism comprises a sliding frame fastened to the base, an internally threaded seat is arranged on the top right side of the sliding frame, a screw rod is threadedly connected in the internally threaded seat, the right end of the screw rod is fastened to a hand wheel, the left end of the screw rod is connected to a displacement plate, a supporting block is fixedly connected to the top of the displacement plate, positioning units are arranged on the left and right sides of the supporting block to clamp and position the two sides of the badminton racket handle, the positioning units comprise a first pressing structure fastened to the front side of the supporting block and a second pressing structure correspondingly arranged on the rear side of the supporting block, the first pressing structure and the second pressing structure are the same in structure and size and are arranged in front-rear reverse symmetry.

[0013] Preferably, the second pressing structure comprises a supporting plate frame fixedly connected to the rear side of the supporting block, a gas cylinder is locked and fixed to the inside middle rear side of the supporting plate frame, a one-bar is connected to the front output shaft of the gas cylinder, slide sleeves are slidably connected to the upper and lower sides of the outer surface of the one-bar, first supporting rods and second supporting rods are rotatably connected to the left and right sides of the slide sleeves, respectively, the other end of the first supporting rod is rotatably connected to the side surface of the supporting plate frame, the other end of the second supporting rod is rotatably connected to a pressing frame, and the pressing frame longitudinally penetrates and slides on the front side of the inside of the supporting plate frame.

[0014] Preferably, the slide sleeves, the first supporting rods, the second supporting rods and the pressing frame are provided with two groups and are arranged in upper-lower symmetry in the middle of the supporting plate frame, and the connection between the second supporting rod and the pressing frame is located outside the sliding position of the pressing frame and the supporting plate frame.

[0015] Preferably, the detection unit is further provided with a data processing module electrically connected with the force sensing module and the displacement sensing module, and the data processing module is configured to:

[0016] receive and record the pressure value and the corresponding deflection deformation, and real-time draw a force-displacement curve;

[0017] based on the slope of the linear segment of the force-displacement curve, automatically calculate and output the hardness value or the elastic modulus of the racket handle.

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] The application effectively shields external interference and potential collision by embedding the detection unit in the vertical plate, provides a stable working environment for the precision sensor, and ensures the accuracy of the data acquisition source; the loading mechanism is locked and fixed on the top of the vertical plate, ensuring its position stability and centration during frequent test force application, and fundamentally reducing the test error caused by mechanism shaking; at the same time, the clamping mechanism is independently arranged in the front area of the support table, leaving sufficient and barrier-free operation space for the operator, making the clamping and taking and placing process of the rod smoother and more efficient; the overall layout takes into account the internal precision requirement and external human-machine interaction experience of the equipment.

[0020] The application adopts an integrated multi-cam driving structure, and can be axially switched by motor driving, so that one device can quickly provide multiple test strokes and load ranges, without the need to replace hardware to adapt to various rods from low hardness to high hardness, greatly enhancing the versatility of the device; at the same time, the driving is amplified and transmitted by the L-shaped pressure rod lever mechanism, and combined with the high-rigidity precision guide pair composed of the slide and the V-shaped groove, finally converting the rotary motion into pure and stable vertical linear motion of the pressure head; not only the micron-level accurate loading control is realized, but also the eccentric load and shaking are effectively inhibited, ensuring the consistency of the test conditions.

[0021] The clamping mechanism of the application adopts a composite structure of front-back symmetry and up-down linkage, when the cylinder acts, through the unique connecting rod amplification mechanism, it can drive the two sets of pressing frames to move synchronously and uniformly towards the center, simultaneously constrain the rod from multiple directions, and form a self-centering stable clamping effect, effectively preventing the rod from twisting, slipping or loosening during the test; in addition, the integrated intelligent detection and data processing system can collect pressure and displacement data in real time and synchronously, automatically draw the force-displacement curve, and calculate the final hardness value or elastic modulus according to the preset algorithm, which maximizes the subjective error introduced by human operation, reading and calculation, and makes the test results have high repeatability and authority. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the application;

[0023] Figure 2 It is a structural schematic diagram of the loading mechanism of the application;

[0024] Figure 3 It is a structural schematic diagram of the driving structure of the application;

[0025] Figure 4 It is a structural schematic diagram of the clamping mechanism of the application;

[0026] Figure 5 It is a structural schematic diagram of the internal thread seat and screw rod connection of the application;

[0027] Figure 6 Structure diagram of the second pressure position structure of the present application;

[0028] Figure 7 Structure diagram of the second pressure position structure of the present application; Figure 6 Left view of the second pressure position structure in the present application.

[0029] In the figure: support table-1, foot pad-2, vertical plate-3, detection unit-4, loading mechanism-5, clamping mechanism-6, carrier-51, driving structure-52, roller-53, pressure rod-54, pad-55, connecting rod-56, slide column-57, groove base-58, pressure head-59, spring-510, first vertical column-521, second vertical column-522, first motor-523, second motor-524, lead screw-525, internal threaded sleeve-526, displacement block-527, rotating sleeve-528, cam member-529, shaft-5210, sliding carriage-61, internal threaded seat-62, screw-63, hand wheel-64, displacement plate-65, support block-66, first pressure position structure-67, second pressure position structure-68, support plate frame-681, air cylinder-682, linear bar-683, sliding sleeve-684, first support rod-685, second support rod-686, pressure frame-687. DETAILED DESCRIPTION

[0030] In order to further explain the technical solutions of the present application, specific embodiments are described in detail below.

[0031] Please refer to Figure 1 The present application provides a hardness testing equipment for badminton racket handle, which comprises a support table 1, a foot pad 2, a vertical plate 3, a detection unit 4, a loading mechanism 5 and a clamping mechanism 6. The four ends of the bottom of the support table 1 are fixed with the foot pad 2. The top left rear side of the support table 1 is fixedly connected with the vertical plate 3, and the detection unit 4 is embedded in the vertical plate 3. The detection unit 4 is embedded in the vertical plate 3, which not only protects the precision sensor from external interference and collision, but also makes the equipment structure compact and beautiful. The detection unit 4 is built-in with a displacement sensing module, which is used for real-time detection of the deflection deformation of the badminton racket handle under pressure, and provides core deformation data for subsequent hardness calculation. The top of the vertical plate 3 is locked and fixed with the loading mechanism 5, so as to apply test force downward, and the position stability of the loading mechanism 5 under frequent action can be ensured. The top right front side of the support table 1 is provided with the clamping mechanism 6, which is independently arranged in front of the support table 1, so as to facilitate the operator to clamp and take and place the handle, and optimize the man-machine operation process.

[0032] The detection unit 4 is further provided with a data processing module inside, which is electrically connected with the force sensing module and the displacement sensing module, and is configured as:

[0033] The pressure value and corresponding deflection deformation are received and recorded, and a force-displacement curve is drawn in real time, so that automatic data acquisition is realized, and the force-displacement curve can intuitively reflect the elastic properties of the racket pole, thereby providing a graphical basis for analysis.

[0034] Based on the slope of the linear segment of the force-displacement curve, the hardness value or elastic modulus of the racket pole is automatically calculated and output, the conversion from original data to physical parameters is completed, the quantitative result is directly given, the human calculation error is eliminated, and the test efficiency and objectivity are improved.

[0035] Referring to Figures 1-3 The application provides a hardness testing device for a badminton racket pole, and the loading mechanism 5 comprises a carrier 51 fastened to the rear side of the bottom of the vertical plate 3, the driving structure 52 is locked and fixed to the top rear side of the carrier 51, the front side of the driving structure 52 is in sliding contact with the roller 53, so that the roller 53 converts the rotary motion into low-friction rolling contact through the contact cooperation between the driving structure 52 and the roller 53, thereby effectively reducing the wear and energy loss of the moving parts.

[0036] The roller 53 is rotationally connected to the top inner side of the pressing rod 54, the bottom rear side of the pressing rod 54 is rotationally connected to the inside of the pad seat 55, and the bottom of the pad seat 55 is fastened to the carrier 51 to form the fulcrum of the lever structure, so that the pressing rod 54 can swing in a seesaw manner around the pad seat 55 and convert the downward pressure at the rear into the downward stroke at the front.

[0037] The pressure rod 54 is in L-shaped structure, and the two sides of the corner of the L-shaped structure are inserted into the inside of the pad seat 55 and rotate. By using the principle of lever, a longer force arm is used to amplify the displacement of the driving end, so as to obtain a precise and controllable micro-displacement at the end of the pressure head 59, so as to adapt to the scene of fine loading required by the test. The reinforcing ribs are arranged between the two rods of the L-shaped structure, which improves the overall structural rigidity and ensures that the deformation is very small when the load is borne, thereby ensuring the accuracy of force transmission.

[0038] The bottom of the pressure head 59 is provided with an arc-shaped groove, which increases the contact area of the pressure head 59 and the cylindrical rod, makes the load distribution more uniform, prevents the pressure head 59 from slipping off the rod during the test, and improves the safety and accuracy of the test. The top of the carrier 51 is provided with a rectangular slot, and the spring 510 is arranged in the rectangular slot. The spring 510 provides space for the movement of the spring 510 and plays a certain guiding role. The left and right sides of the slide column 57 are triangular, and the two triangular shapes are respectively connected with the two V-shaped grooves in the groove seat 58. The triangular shape and the V-shaped groove constitute a precise sliding pair, which has the effect of automatic centering and centering, can effectively eliminate the gap, and ensure the high precision and high rigidity of the movement of the slide column 57, thereby avoiding radial shaking.

[0039] The driving structure 52 includes the first column 521 and the second column 522 which are respectively locked and fixed on the left and right sides of the top of the carrier 51, and provides firm and symmetrical support for the driving component 52, so as to ensure the stable operation of the whole driving system. The first motor 523 is locked and fixed on the left side of the first column 521, and the second motor 524 is locked and fixed on the right side of the second column 522. The outer surface of the lead screw 525 is provided with a threaded groove, and the threaded groove is threadedly connected with the inner threaded sleeve 526. The second motor 524 is used as a power source, so that the lead screw 525 converts the rotary motion of the second motor 524 into linear motion through the cooperation of the lead screw 525 and the inner threaded sleeve 526. The outer surface of the inner threaded sleeve 526 is wrapped and fixed with the displacement block 527, so as to accurately position and keep the displacement block 527 at the specified position.

[0040] A rotating sleeve 528 is arranged through the inside bottom of the displacement block 527, a cam member 529 is arranged on the right side of the rotating sleeve 528, the rotating sleeve 528 allows the cam member 529 to rotate freely in the displacement block 527, and the cam member 529 moves transversely together with the displacement block 527, so as to realize the composite motion of rotation and movement; the rotating sleeve 528 and the cam member 529 are both arranged through the inside, and the shaft rod 5210 is arranged on the left part of the rotating sleeve 528 and the cam member 529 and connected with the right side output end of the first motor 523, the shaft rod 5210 is a core transmission shaft, and is responsible for transmitting the power of the first motor 523 to the cam member 529; the screw rod 525 is rotatably connected to the inside upper side of the first column 521 and the second column 522, and the shaft rod 5210 is rotatably connected to the inside middle side of the first column 521 and the second column 522, so as to provide support through the two columns and maintain the position accuracy; the front part of the cam member 529 is in contact with the roller 53 to rotate, so as to transmit the power of the driving structure 52 to the roller 53, which is a key interface of the subsequent lever mechanism.

[0041] The cam member 529 is composed of three disc-shaped cams and connecting components connected between the three disc-shaped cams to form an integral whole, the position of the displacement block 527 is changed to enable the roller 53 to be in contact with the three disc-shaped cams in turn, so as to realize the integration of multiple stroke specifications on one component, and the appropriate cam can be selected by axial movement, so that the test is performed within the optimal range, and the test efficiency and flexibility are improved; the outer surface of the shaft rod 5210 is transversely provided with a sliding key, and the sliding key is inserted and slides in the rotating sleeve 528 and the cam member 529, so that the cam member 529 can rotate synchronously with the shaft rod 5210 to transmit torque, and can slide on the shaft rod 5210 to switch the position, so as to realize the decoupling of the functions of power transmission and position adjustment; the rear ends of the three disc-shaped cams and the connecting components of the cam member 529 are flush, and the connecting components are provided with two, the front sides of the two connecting components are inclined, and the three disc-shaped cams are matched to smoothly transition the roller 53 between the three disc-shaped cams, so that the roller 53 can smoothly slide in and out when switching between different cams, and the rigidity impact and jamming phenomenon are avoided, and the smoothness and reliability of the mechanism switching are ensured.

[0042] Please refer to Figure 1 、 Figures 4-7 The present application provides a kind of hardness test equipment of badminton racket handle, clamping mechanism 6 includes the sliding frame 61 of bottom and the fastening of support 1, sliding frame 61 top right side is provided with internal thread seat 62, and internal thread seat 62 is threadedly connected with screw rod 63, screw rod 63 right end is fastened with hand wheel 64, and screw rod 63 left end is connected with shift plate 65, to convert the rotation of hand wheel 64 into the linear movement of shift plate 65 by screw pair;

[0043] The top of the moving plate 65 is fixedly connected with a supporting block 66, and the left and right sides of the supporting block 66 are both provided with positioning units to clamp and position the two sides of the racket handle, so that the symmetric clamping of the racket handle is realized, and the twisting or turning of the racket during testing is effectively prevented; the positioning unit comprises a first pressing structure 67 fixed on the front side of the supporting block 66 and a second pressing structure 68 correspondingly arranged on the rear side of the supporting block 66, the first pressing structure 67 and the second pressing structure 68 are the same in structure and size and are arranged in front-rear reverse symmetry, so that the balanced distribution of the clamping force is ensured, the force on the racket is centered, the additional bending moment caused by eccentric clamping is avoided, and the accuracy of the test data is ensured.

[0044] The second pressing structure 68 comprises a supporting plate frame 681 fixedly connected to the rear side of the supporting block 66, and a cylinder 682 as a clamping force power source is locked and fixed in the middle rear side of the supporting plate frame 681, which provides stable and controllable linear driving force; the front output shaft of the cylinder 682 is connected with a one-bar 683, the outer surface of the one-bar 683 is slidably connected with a sleeve 684 on the upper and lower sides, the left and right sides of the sleeve 684 are rotatably connected with a first supporting rod 685 and a second supporting rod 686, the other end of the first supporting rod 685 is rotatably connected with the side surface of the supporting plate frame 681, and the other end of the second supporting rod 686 is rotatably connected with a pressing frame 687, the first supporting rod 685 and the second supporting rod 686 and the sleeve 684 together constitute an amplification mechanism, which amplifies the smaller stroke of the cylinder 682 to a larger clamping stroke of the pressing frame 687.

[0045] The sleeve 684, the first supporting rod 685, the second supporting rod 686 and the pressing frame 687 are all provided with two groups and are arranged in an upper-lower symmetry manner in the middle part of the supporting plate frame 681, so that clamping force can be applied from the upper and lower directions at the same time, forming a self-centering clamping point, effectively restraining the up-down and left-right degrees of freedom of the racket handle, and the clamping is more stable and reliable; the pressing frame 687 longitudinally penetrates and slides in the front side of the supporting plate frame 681, and the connection between the second supporting rod 686 and the pressing frame 687 is located outside the sliding part of the pressing frame 687 and the supporting plate frame 681, further optimizing the stroke and force amplification ratio, so that the cylinder 682 can drive the pressing frame 687 to generate a larger clamping stroke and sufficient clamping force with smaller thrust and stroke, realizing labor-saving and efficient power transmission.

[0046] The working principle of the hardness testing equipment for the racket rod of the badminton racket is as follows:

[0047] First, during operation, the device is prepared and the racket is clamped, the racket handle is placed in the first and second pressure structures 67 and 68 above the support block 66, and the air cylinder 682 is started, the air cylinder 682 drives the straight rod 683 to move away from the air cylinder 682, the upper and lower slide bushings 684 slide on the straight rod 683 under the action of the first support rod 685, and the two second support rods 686 transmit the linear thrust of the air cylinder 682 to the two pressure frames 687 on the upper and lower sides, so that the four pressure frames 687 are synchronously closed from the upper and lower directions, thereby stably and reliably clamping the racket handle.

[0048] Second, the driving structure 52 starts to work and performs precise loading, the first motor 523 is started, and the shaft rod 5210 and the cam member 529 mounted thereon rotate at a constant speed; when the test stroke needs to be adjusted, the second motor 524 is started, the displacement block 527 is driven to move transversely along the shaft rod 5210 together with the cam member 529 through the cooperation of the screw rod 525 and the internal thread sleeve 526, so that the roller 53 contacts one of the three different sizes of cams, thereby achieving stepless switching of the test stroke; during the rotation of the cam member 529, the profile thereof pushes the roller 53 to convert the rotary motion into a periodic reciprocating downward pressing motion.

[0049] Third, the downward pressing force of the roller 53 acts on the rear end of the L-shaped pressing rod 54, the pressing rod 54 takes the connecting point thereof with the pad seat 55 as a fulcrum, amplifies and converts the movement of the rear end like a lever, and then pushes the slide column 57 through the connecting rod 56 at the front end; the slide column 57 performs strict vertical linear motion under the precise guidance of the V-shaped groove in the groove seat 58, overcomes the resistance of the spring 510, and finally makes the pressing head 59 fixed at the tail end thereof accurately press the racket rod with a set stroke; at the same time, the force sensing module embedded in the connection between the pressing head 59 and the slide column 57 detects and feeds back the pressure value applied to the racket rod in real time.

[0050] Fourth, the detection unit 4 and the data processing system are synchronously operated to complete data acquisition, analysis and result output, the displacement sensing module in the detection unit 4 continuously monitors the deflection deformation of the racket rod during the pressing process of the pressing head 59; the data processing module synchronously receives the pressure data from the force sensing module and the displacement data from the displacement sensing module, and real-time draws a force-displacement curve; finally, the system automatically analyzes the slope of the linear segment of the curve, calculates the hardness value or the elastic modulus of the racket rod according to a preset algorithm, and directly displays or outputs the quantitative result.

[0051] Fifth, after the subsequent test ends, the driving structure 52 is unloaded, under the action of the restoring force of the spring 510, the entire lever mechanism and the pressure head 59 are quickly reset, ready for the next test; after performing a test, the operator can rotate the hand wheel 64, drive the entire clamping mechanism 6 to move along the slide 61 through the screw rod 63, so as to change the lateral position of the badminton racket, change the contact position of the racket and the pressure head 59, and realize the test of different parts of the racket.

[0052] The above only describes the preferred examples of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A device for testing the hardness of a badminton racket shaft, comprising a support (1), wherein pads (2) are fixed at all four ends of the bottom of the support (1), and a vertical plate (3) is fixedly connected to the top left rear side of the support (1), and a detection unit (4) is embedded inside the vertical plate (3), wherein the detection unit (4) has a built-in displacement sensing module for real-time detection of the deflection deformation of the badminton racket shaft under pressure, characterized in that: The top of the vertical plate (3) is locked and fixed with a loading mechanism (5), the top of the right front side of the support table (1) is installed with a clamping mechanism (6), the loading mechanism (5) comprises a carrier (51) which is fastened with the vertical plate (3) at the bottom rear side, the top rear side of the carrier (51) is locked and fixed with a driving structure (52), the front side of the driving structure (52) is slidably contacted with a roller (53), the roller (53) is rotatably connected to the inner side of the top of a pressing rod (54), the bottom rear side of the pressing rod (54) is rotatably connected to the inside of a pad seat (55), the bottom of the pad seat (55) is fastened with the carrier (51), the front part of the pressing rod (54) is rotatably connected with a connecting rod (56), and the bottom of the connecting rod (56) is rotatably connected with a sliding column (57), the sliding column (57) is slidably arranged in the inside of a groove seat (58), and the bottom end of the sliding column (57) is locked and fixed with a pressure head (59), the rear part of the groove seat (58) is fixed with the carrier (51), the bottom middle side of the pressing rod (54) is connected with a spring (510), and the bottom end of the spring (510) is connected with the carrier (51), the inside of the connecting place of the pressure head (59) and the sliding column (57) is provided with a force sensing module, which is used for detecting the pressure value applied to the badminton racket rod by the pressure head (59) in real time.

2. A hardness testing apparatus for a badminton racket handle according to claim 1, wherein: The pressing rod (54) is in L-shaped structure, the both sides of the corner of the L-shaped structure are inserted and rotated in the inside of the pad seat (55), and the two rods of the L-shaped structure are provided with reinforcing ribs, and the bottom of the pressure head (59) is provided with an arc-shaped groove.

3. A hardness testing apparatus for a badminton racket handle according to claim 1, wherein: The top front side of the carrier (51) is provided with a rectangular through slot, the spring (510) is arranged in the inside of the rectangular through slot, the left and right sides of the sliding column (57) are both triangular, and the two triangular places are respectively slidably connected with two V-shaped grooves in the inside of the groove seat (58).

4. A hardness testing apparatus for a badminton racket handle according to claim 1, wherein: The driving structure (52) comprises a first vertical column (521) and a second vertical column (522) which are respectively locked and fixed at the top left and right sides of the carrier (51), the left side of the first vertical column (521) is locked and fixed with a first motor (523), the right side of the second vertical column (522) is locked and fixed with a second motor (524), the left output end of the second motor (524) is connected with a lead screw (525), the outer surface of the left half of the lead screw (525) is provided with a threaded groove, the outer side of the threaded groove is threadedly connected with an internal thread sleeve (526), the outer surface of the internal thread sleeve (526) is wrapped and fixed with a displacement block (527), the inside of the bottom side of the displacement block (527) is rotatably penetrated with a rotating sleeve (528), the right side of the rotating sleeve (528) is installed with a cam part (529), and the inside of the rotating sleeve (528) and the cam part (529) is both penetrated with a shaft (5210), the lead screw (525) is rotatably connected to the inside of the upper side of the first vertical column (521) and the second vertical column (522), the shaft (5210) is rotatably connected to the inside of the middle side of the first vertical column (521) and the second vertical column (522), and the left part of the shaft (5210) is connected with the right output end of the first motor (523), the front part of the cam part (529) is contacted and rotated with the roller (53).

5. A hardness testing apparatus for a badminton racket handle according to claim 4, wherein: The cam member (529) is composed of three disc-shaped cams and connecting components connected between them to form a whole, and the roller (53) can be in contact with the three disc-shaped cams in turn by changing the position of the displacement block (527).

6. A hardness testing apparatus for a badminton racket handle according to claim 5, wherein: The outer surface of the shaft (5210) is transversely provided with a sliding key, which is inserted into the inside of the rotating sleeve (528) and the cam member (529). The rear ends of the three disc-shaped cams and the connecting components of the cam member (529) are flush, and the connecting components are provided with two, the front sides of the two connecting components are inclined, and the three disc-shaped cams are matched to smoothly transition the roller (53) between the three disc-shaped cams.

7. A hardness testing apparatus for a badminton racket handle according to claim 1, wherein: The clamping mechanism (6) includes a sliding frame (61) fastened to the support (1) at the bottom, an internally threaded seat (62) is arranged at the top right side of the sliding frame (61), and a screw rod (63) is threadedly connected inside the internally threaded seat (62), the right end of the screw rod (63) is fastened to a hand wheel (64), and the left end of the screw rod (63) is connected to a displacement plate (65), the top of the displacement plate (65) is fixedly connected to a support block (66), the left and right sides of the support block (66) are provided with positioning units to clamp and position the two sides of the badminton racket handle, the positioning units include a first pressing structure (67) fastened to the front side of the support block (66) and a second pressing structure (68) correspondingly arranged on the rear side of the support block (66), the first pressing structure (67) and the second pressing structure (68) are the same in structure and size and are arranged in front-to-back reverse symmetry.

8. A hardness testing apparatus for a badminton racket handle according to claim 7, wherein: The second pressing structure (68) includes a support frame (681) fixedly connected to the rear side of the support block (66), a gas cylinder (682) is locked and fixed inside the middle rear side of the support frame (681), a one-bar (683) is connected to the front output shaft of the gas cylinder (682), slide sleeves (684) are slidably connected to the upper and lower sides of the outer surface of the one-bar (683), first and second supporting rods (685) and (686) are rotatably connected to the left and right sides of the slide sleeves (684), respectively, the other end of the first supporting rod (685) is rotatably connected to the side of the support frame (681), the other end of the second supporting rod (686) is rotatably connected to a pressing frame (687), and the pressing frame (687) longitudinally penetrates and slides inside the front side of the support frame (681).

9. A hardness testing apparatus for a badminton racket handle according to claim 8, wherein: The slide sleeves (684), the first and second supporting rods (685) and (686), and the pressing frame (687) are all provided with two groups and are arranged in up-down symmetry in the middle of the support frame (681), and the connection between the second supporting rod (686) and the pressing frame (687) is located outside the sliding position of the pressing frame (687) and the support frame (681).

10. A hardness testing apparatus for a badminton racket handle according to claim 1, wherein: The detection unit (4) is also provided with a data processing module electrically connected with the force sensing module and the displacement sensing module, which is configured to: receive and record the pressure value and the corresponding deflection deformation, and real-time draw the force-displacement curve; based on the linear segment slope of the force-displacement curve, automatically calculate and output the hardness value or the elastic modulus of the racket.

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