Fatigue testing machine for racket force of racket

Abstract

The invention discloses a racket force fatigue testing machine, and relates to the technical field of racket detection. The device comprises a base, a machine body is fixed to the upper portion of the base, a power switch and an emergency stop button are arranged on the upper side of one end of the machine body, a rotating disc is rotationally matched with one side in the machine body, and a release limiting block and a return limiting block are symmetrically arranged on the peripheral side of the rotating disc. Through the arrangement of the front-back sliding seat and the fixing block, the positions of the front-back sliding seat and the fixing block can be adjusted according to the beating position of the racket, so that the beating head sensor can be better in vertical contact with the racket at 90 degrees after the racket is raised and released, and the test effect is improved; the racket can be quickly disassembled and assembled, the trouble of screw installation is reduced, in addition, the positions of the adjusted front and back sliding seats can be fixed through the sliding seat fixing plate, the stability of the beating head sensor is further ensured, and the final test result is improved.

Description

Technical Field

[0001] The invention belongs to the field of racket detection, and in particular relates to a racket force fatigue testing machine. Background Art

[0002] The racket in this application is a badminton racket or a tennis racket. A badminton racket is generally composed of a racket head, a racket shaft, a racket handle, and a joint between a racket frame and a racket shaft. The length of a racket does not exceed 68 cm, wherein the racket handle and the racket shaft are no longer than 42 cm, the racket frame is no longer than 25 cm, and the width is 20 cm. A tennis racket is composed of a racket head, a racket throat, and a racket handle, and when used, it is also necessary to use accessories such as tennis strings and shock-absorbing knots. Different tennis rackets are suitable for different groups of people. Badminton rackets and tennis rackets need to be tested for racket fatigue before they are sold out of the factory.

[0003] The Chinese patent with publication number CN102980699A discloses a badminton racket force fatigue testing machine, including a first frame and a second frame arranged relatively, a racket handle fixing fixture is arranged between the first frame and the second frame, an angle dial is also arranged between the racket handle fixing fixture and the second frame, and a racket striking head is also arranged between the first frame and the second frame, and the racket striking head is respectively connected to a control system, a driving motor, a return motor, a driving clutch and a return clutch. Compared with the prior art, the testing machine provided by the present invention can swing the badminton racket multiple times, and can ensure that the speed, angle, hitting point position and swing interval time difference of each swing are the same, so as to measure the strength of each swing, and after reaching the set number of times, the change of its strength decay can be observed, so as to accurately measure the racket force fatigue performance of the badminton racket.

[0004] Since the rackets tested each time are not exactly the same, the above application cannot ensure the vertical angle between the racket and the striking head, and it is easy to cause the hitting to not be in place, thereby reducing the final racket force fatigue test performance and greatly reducing the accuracy of the test data. In addition, the racket detection and disassembly type requires the use of screws for installation, which is troublesome and not convenient to use.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a racket force fatigue testing machine to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] A racket force fatigue testing machine, comprising: a base, a body fixed on the top of the base, a power switch and an emergency stop button installed on the upper side of one end of the body, a turntable rotatably matched on one side of the body, a release limit block and a return limit block symmetrically installed on the circumference of the turntable, and a release induction sensor and a return induction sensor corresponding to the release limit block and the return limit block installed on one side of the body;

[0009] A rotating shaft is fixed in the middle of one side of the turntable, a racket fixing clamp is fixed on the circumference of the rotating shaft, a clamp fixing component is installed on the circumference of the racket fixing clamp, a front and rear sliding seat is slidably matched with the middle of the upper side of the base, a fixing block is slidably matched with the front side of the front and rear sliding seat, a striking head sensor is installed on the front side of the fixing block, the racket fixing clamp is located just above the front side of the striking head sensor, two sliding seat fixing plates are installed on the upper side of the base, and the two sliding seat fixing plates are located on opposite sides of the front and rear sliding seats.

[0010] Optionally, a rotating motor is installed inside the machine body, and an output end of the rotating motor is fixed to the axis of the turntable.

[0011] By adopting the above technical solution, the rotating motor is used to drive the turntable to rotate, so as to drive the racket to rise and fall back and forth, thereby achieving the hitting effect on the racket.

[0012] Optionally, the turntable is a double-layer turntable, which includes a left turntable and a right turntable, the release limit block and the return limit block are respectively fixed to the circumference of the left turntable and the right turntable, and one end of the rotating shaft is rotatably matched with the other side of the body.

[0013] By adopting the above technical solution, the starting point of the racket being raised can be determined by setting a release limit block, and the distance between the return limit block and the return sensing sensor can be used to change the hitting angle and force of the racket, thereby better performing a racket force test on the racket.

[0014] Optionally, the racket fixing fixture includes a rear fixture fixed to the circumference of the rotating shaft, a front fixture slidably fitted to the front side of the rear fixture, and a through hole opened on the inner sides of the rear fixture and the front fixture relative to each other.

[0015] By adopting the above technical solution, the racket can be placed in the through hole for installation by setting the rear clamp and the front clamp, so as to prepare for the next racket test.

[0016] Optionally, the clamp fixing assembly includes four rear L-shaped blocks fixed to the circumferential sides of the four diagonal positions of the rear clamp, a front L-shaped block slidingly fitted to the middle of the front end of the four rear L-shaped blocks, a fixing rod fixed to the middle of the rear end of the front L-shaped block, a plate body fixed to the rear ends of the four fixing rods, a screw rod threadedly fitted to the middle of the plate body, and a motor fixed to the rear end of the screw rod.

[0017] By adopting the above technical solution, through the screw arranged in the middle of the plate body and the four fixing rods arranged on the front side of the plate body, the four front L-shaped blocks can be driven to slide and fit in the four rear L-shaped blocks, so that pressure can be applied to the four diagonal points of the rear clamp and the front clamp, so that the rear clamp and the front clamp can clamp the racket more stably, and the racket can be easily and quickly disassembled.

[0018] Optionally, the inner sides of the front ends of the four front L-shaped blocks are fixedly connected to the four diagonal parts of the front clamp, the rear ends of the front L-shaped blocks are slidingly fitted in the middle part of the front end of the rear L-shaped blocks, the rear end of the fixing rod passes through the middle part of the rear L-shaped block, and the front end of the screw rod is rotationally fitted in the middle part of the rear clamp.

[0019] By adopting the above technical solution, the front L-shaped block and the rear L-shaped block are combined to form a U-shaped structure, which can better apply pressure to the front and rear sides of the rear clamp and the front clamp, thereby making the racket installation more stable.

[0020] Optionally, a slide rail is provided in the middle of the upper side of the base, and the front and rear sliding seats are slidably fitted on top of the slide rail, and the front and rear sliding seats are located in the middle of the body.

[0021] By adopting the above technical solution, the slide rail can be used to drive the front and rear sliding seats to adjust the front and rear positions, so that after the racket is raised and released, it will vertically contact the striking head sensor at a right angle of 90 degrees, thereby better testing the racket force fatigue strength.

[0022] Optionally, an electric slide rail is provided on the front side of the front and rear sliding seats, and the fixed block is slidably fitted on one side of the electric slide rail.

[0023] By adopting the above technical solution, the electric slide rail can be used to drive the fixed block to adjust the upper and lower positions, so that the striking head sensor is better located at the position of the racket that needs to be tested.

[0024] Optionally, a groove is provided in the middle of the base, and a clamping assembly drivingly connected to the two sliding seat fixing plates is installed in the groove.

[0025] By adopting the above technical solution, the clamping assembly can be used to drive the two sliding seat fixing plates to fix the positions of the adjusted front and rear sliding seats, thereby ensuring the stability of the racket when it hits the head sensor.

[0026] Optionally, the clamping assembly includes a rotating motor fixed to the bottom of the groove, a gear fixed to the output end of the rotating motor, and two tooth plates slidingly fitted to the bottom of the groove, the two tooth plates are arranged opposite to each other, the gear is located between the two tooth plates and meshed with them, and the opposite ends of the two tooth plates are respectively fixed to the lower sides of the two sliding seat fixing plates.

[0027] By adopting the above technical solution, the gear is engaged with the two tooth plates, so that the two sliding seat fixing plates can be synchronously driven to move relatively closer or farther away, thereby achieving the clamping and fixing of the front and rear sliding seats by the two sliding seat fixing plates.

[0028] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all the advantages described below at the same time:

[0029] 1. By installing the release limit block and return limit block on the side of the turntable, and the release sensing sensor and return sensing sensor on one side of the body, the turntable can drive the racket to lift up and release the contact and strike the head sensor to a 90-degree vertical state, and the racket striking fatigue force value can be set according to the rotation speed of the turntable, so as to further better test and detect the racket's hitting fatigue force value.

[0030] 2. By setting the front and rear sliding seats and fixed blocks, the positions of the front and rear sliding seats and fixed blocks can be adjusted according to the hitting position of the racket, so that the striking head sensor can better make vertical contact with the racket at 90 degrees after it is raised and released, thereby improving the test effect. By setting the clamp fixing components around the fixing fixture, the racket can be quickly disassembled and assembled, reducing the trouble of screw installation. In addition, the sliding seat fixing plate can be used to fix the adjusted front and rear sliding seat positions, further ensuring the stability of the striking head sensor and improving the final test results.

[0031] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0033] In the figure:

[0034] Figure 1 It is a schematic diagram of the body structure;

[0035] Figure 2 This is a schematic diagram of the racket fixing fixture structure;

[0036] Figure 3 is a schematic diagram of the base structure;

[0037] Figure 4 It is a schematic diagram of the front and rear sliding seat structure;

[0038] Figure 5 for Figure 4 Schematic diagram of the structure at A in the middle;

[0039] Figure 6 Schematic diagram of the tooth plate structure;

[0040] Figure 7 This is a diagram of the racket hitting fatigue strength chart;

[0041] Figure 8 This is a schematic diagram of a racket hitting fatigue strength test chart;

[0042] Fig. 9 A schematic diagram for recording the bat hitting history data;

[0043] Fig.10 This is a schematic diagram of real-time recording of data during the test;

[0044] Fig.11 Set up a schematic diagram for the function;

[0045] Fig.12 This is a test report diagram.

[0046] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0047] Base 1, body 2, power switch 3, emergency stop button 4, turntable 5, release limit block 6, release induction sensor 7, return induction sensor 8, return limit block 9, shaft 10, racket fixing fixture 11, through hole 110, rear L-shaped block 111, front L-shaped block 112, fixing rod 113, plate body 114, motor 115, screw 116, fixture fixing assembly 12, front and rear sliding seats 13, fixing block 14, striking head sensor 15, sliding seat fixing plate 16, electric slide rail 17, clamping assembly 18, rotating motor 181, gear 182, tooth plate 183, groove 19.

[0048] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0049] The present invention will now be described in further detail with reference to the accompanying drawings.

[0050] See also Figure 1-12As shown, in this embodiment, a racket force fatigue testing machine is provided, comprising a base 1, a body 2 fixed on the top of the base 1, a power switch 3 and an emergency stop button 4 are installed on the upper side of one end of the body 2, a turntable 5 is rotatably arranged on one side of the body 2, a release limit block 6 and a return limit block 9 are symmetrically arranged on the circumference of the turntable 5, a release sensing sensor 7 and a return sensing sensor 8 corresponding to the release limit block 6 and the return limit block 9 are installed on one side of the body 2, the turntable 5 can drive the racket to lift up and release the contact hitting head sensor 15 to be in a 90-degree vertical state, and the racket hitting fatigue force value can be set according to the rotation speed of the turntable 5, so as to further better test and detect the racket force fatigue force value;

[0051] A rotating shaft 10 is fixed in the middle of one side of the rotating disk 5, a racket fixing fixture 11 is fixed on the peripheral side of the rotating shaft 10, and a fixture fixing component 12 is installed on the peripheral side of the racket fixing fixture 11, so that the racket can be quickly disassembled and assembled, reducing the trouble of screw installation. A front and rear sliding seat 13 is slidably matched in the middle of the upper side of the base 1, and a fixing block 14 is slidably matched on the front side of the front and rear sliding seat 13. A striking head sensor 15 is installed on the front side of the fixing block 14, and the front and rear sliding seat 13 and the fixing block 14 can be adjusted according to the striking position of the racket. The position allows the striking head sensor 15 to better make vertical contact with the racket at 90 degrees after it is raised and released, thereby improving the test effect. The racket fixing fixture 11 is located just above the front side of the striking head sensor 15. Two sliding seat fixing plates 16 are installed on the upper side of the base 1. The two sliding seat fixing plates 16 are located on the opposite sides of the front and rear sliding seats 13. The sliding seat fixing plates 16 can be used to fix the positions of the front and rear sliding seats 13 after adjustment, thereby further ensuring the stability of the striking head sensor 15 and improving the final test results.

[0052] The application of one aspect of this embodiment is as follows: first, connect the power supply of the testing machine normally, connect the computer data cable, turn on the power switch 3 of the machine body 2 after the inspection is completed, then install the racket to the middle of the racket fixing fixture 11, and fix it with the fixture fixing component 12, then adjust the position of the front and rear sliding seats 13 and the fixing block 14, so that the racket is lifted and released and vertically contacts the striking head sensor 15 at a right angle of 90 degrees, and finally start the turntable 5 to rotate, so that the turntable 5 drives the release limit block 6 and the return limit block 9 to move synchronously, and then the release limit block 6 and the return limit block 9 are sensed by the release sensing sensor 7 and the return sensing sensor 8 respectively, so as to realize the reciprocating return rotation of the turntable 5, and at the same time, the shaft 10 drives the racket fixing fixture 11 and the racket to be lifted and released for striking, wherein the farther the return limit block 9 is from the return sensing sensor 8, the greater the striking angle and the greater the force, and vice versa. It should be noted that all electrical equipment involved in this application can be powered by batteries or external power supplies.

[0053] like Figure 1As shown, a rotating motor is installed inside the machine body 2 of this embodiment, and the output end of the rotating motor is fixed to the axis of the turntable 5. Starting the rotating motor can drive the turntable 5 to rotate, and the starting rotating motor is electrically connected to the release sensing sensor 7 and the return sensing sensor 8, and the rotating motor is started to rotate forward and then reverse by receiving signals from the release sensing sensor 7 and the return sensing sensor 8.

[0054] like Figure 1 As shown, the turntable 5 of this embodiment is a double-layer turntable, which includes a left turntable and a right turntable. The release limit block 6 and the return limit block 9 are respectively fixed to the circumference of the left turntable and the right turntable, and one end of the rotating shaft 10 is rotatably matched with the other side in the machine body 2. The left turntable and the right turntable rotate synchronously. When the release limit block 6 contacts the release sensing sensor 7, the distance between the return limit block 9 and the return sensing sensor 8 becomes larger, and vice versa, thereby realizing the lifting and release of the racket. And the position of the return limit block 9 can be adjusted according to the different conditions of the test badminton racket or tennis racket.

[0055] like Figure 4-5 As shown, the racket fixing fixture 11 of this embodiment includes a rear fixture fixed to the circumference of the rotating shaft 10, a front fixture slidably fitted to the front side of the rear fixture, and a through hole 110 opened on the inner side of the rear fixture and the front fixture. The racket to be tested is placed in the through hole 110 and clamped and fixed by the rear fixture and the front fixture.

[0056] like Figure 4-5 As shown, specifically, the specific structure of the clamp fixing assembly 12 includes as follows: the clamp fixing assembly 12 includes four rear L-shaped blocks 111 fixed to the sides of the four diagonal positions of the rear clamp, a front L-shaped block 112 slidingly fitted in the middle of the front end of the four rear L-shaped blocks 111, a fixing rod 113 fixed in the middle of the rear end of the front L-shaped block 112, a plate body 114 fixed to the rear ends of the four fixing rods 113, a screw rod 116 threadedly fitted in the middle of the plate body 114, and a motor 115 fixed to the rear end of the screw rod 116. When the racket is located in the through hole 110 and needs to be installed, the motor 115 is started, and the output end of the motor 115 drives the screw 116 to rotate, and then the screw 116 and the plate body 114 are threadedly matched to drive the plate body 114 to move to the side away from the rear clamp, so that the plate body 114 synchronously drives the four fixing rods 113 to extend out of the middle part of the rear L-shaped block 111, so that the four fixing rods 113 synchronously drive the rear ends of the four front L-shaped blocks 112 to retract into the middle part of the front end of the rear L-shaped block 111, thereby shortening the distance between the rear L-shaped block 111 and the front L-shaped block 112, so that the rear L-shaped block 111 and the front L-shaped block 112 apply pressure to the outer sides of the rear clamp and the front clamp, thereby completing the stable clamping of the rear clamp and the front clamp, and completing the rapid installation of the racket.

[0057] like Figure 4-5As shown, the front inner sides of the four front L-shaped blocks 112 of this embodiment are fixedly connected to the four diagonal parts of the front clamp, the rear end of the front L-shaped block 112 is slidably matched with the middle part of the front end of the rear L-shaped block 111, the rear end of the fixing rod 113 passes through the middle part of the rear L-shaped block 111, and the front end of the screw rod 116 is rotationally matched with the middle part of the rear clamp. When the rear end of the front L-shaped block 112 extends out of the middle part of the front end of the rear L-shaped block 111, the distance between the front L-shaped block 112 and the rear L-shaped block 111 becomes longer, and at the same time, the front end of the front L-shaped block 112 synchronously drives the front clamp to move to the side away from the rear clamp, thereby realizing the rapid disassembly of the racket.

[0058] like Figure 4 As shown, a slide rail is provided in the middle of the upper side of the base 1 of this embodiment, and the front and rear sliding seats 13 are slidably matched on the upper side of the slide rail, and the front and rear sliding seats 13 are located in the middle of the body 2. The slide rail is located at the rear side of the groove 19, and the slide rail can be used to drive the front and rear sliding seats 13 to adjust the front and rear positions, so as to better complete the subsequent experiments.

[0059] like Figure 1 As shown, in this embodiment, the front side of the front and rear sliding seat 13 is provided with an electric slide rail 17, and the fixed block 14 is slidably matched with one side of the electric slide rail 17. Starting the electric slide rail 17 can drive the fixed block 14 to adjust the up and down position, so that the fixed block 14 drives the striking head sensor 15 to be better located at the striking surface of the racket.

[0060] like Figure 4 As shown, a groove 19 is formed in the middle of the base 1 of this embodiment, and a clamping assembly 18 drivingly connected to the two sliding seat fixing plates 16 is installed in the groove 19 .

[0061] like Figure 6 As shown, specifically, the specific structure of the clamping assembly 18 includes the following: the clamping assembly 18 includes a rotary motor 181 fixed to the inner bottom of the groove 19, a gear 182 fixed to the output end of the rotary motor 181, and two tooth plates 183 slidably matched to the inner bottom of the groove 19. The two tooth plates 183 are arranged opposite to each other, the gear 182 is located between the two tooth plates 183 and meshes with them, and the opposite ends of the two tooth plates 183 are respectively fixed to the lower sides of the two sliding seat fixing plates 16. When the position adjustment of the front and rear sliding seats 13 is completed, the rotary motor 181 is started, and the output end of the rotary motor 181 drives the gear 182 to rotate, so that the gear 182 meshes with the two tooth plates 183, and then the tooth plates 183 drive the two sliding seat fixing plates 16 to be relatively close, so that the two sliding seat fixing plates 16 complete the clamping and fixing of the opposite sides of the front and rear sliding seats 13.

[0062] like Figure 7-12As shown, specifically, the testing machine is connected to the computer end, the striking head sensor 15 is connected to the control system, the force sensor, the speed sensor, the control circuit board and the data acquisition card, the release sensing sensor 7 and the return sensing sensor 8 can be set as an electromagnet clutch, which is convenient for attraction and release. After the testing machine power supply is normally connected and the computer data cable is connected, after the inspection is completed, turn on the power switch 3 of the body 2, and after the computer starts normally, open the test software, the racket hitting fatigue strength chart, and set the corresponding racket number, number of hits, test speed and other debugging test speed force values. After the above parameters are set, use your hand to adjust the racket to a 90-degree vertical state, click the mouse to release the sensing sensor 7 and the release limit block 6 to attract. After the attraction is completed, the data is cleared and the test button is clicked to start the test. The test data is collected and transmitted to the computer end via the data acquisition card. After the test is completed, visually observe the racket to see if it is broken or deformed, and judge whether the racket is qualified according to the standard requirements.

[0063] The present invention is not limited to the above-mentioned embodiments. Anyone should be aware that any structural changes made under the enlightenment of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the protection scope of the present invention. The technology, shape, and structural parts not described in detail in the present invention are all well-known technologies.

Claims

1. A racket force fatigue testing machine, It is characterized in that include: A base (1), a body (2) is fixed above the base (1), a power switch (3) and an emergency stop button (4) are installed on the upper side of one end of the body (2), a turntable (5) is rotatably mounted on one side of the body (2), a release limit block (6) and a return limit block (9) are symmetrically mounted on the circumference of the turntable (5), and a release induction sensor (7) and a return induction sensor (8) corresponding to the release limit block (6) and the return limit block (9) are installed on one side of the body (2); A rotating shaft (10) is fixed in the middle of one side of the rotating disk (5), a racket fixing clamp (11) is fixed around the rotating shaft (10), a clamp fixing assembly (12) is installed around the racket fixing clamp (11), a front and rear sliding seat (13) is slidably matched in the middle of the upper side of the base (1), a fixing block (14) is slidably matched on the front side of the front and rear sliding seat (13), a striking head sensor (15) is installed on the front side of the fixing block (14), the racket fixing clamp (11) is located directly above the front side of the striking head sensor (15), and two sliding seat fixing plates (16) are installed on the upper side of the base (1), and the two sliding seat fixing plates (16) are located on opposite sides of the front and rear sliding seats (13).

2. A racket force fatigue testing machine according to claim 1, It is characterized in that A rotating motor is installed inside the machine body (2), and the output end of the rotating motor is fixed to the axial center of the turntable (5).

3. A racket force fatigue testing machine according to claim 1, It is characterized in that The turntable (5) is a double-layer turntable, comprising a left turntable and a right turntable, the release limit block (6) and the return limit block (9) are respectively fixed to the circumference of the left turntable and the right turntable, and one end of the rotating shaft (10) is rotatably matched with the other side in the machine body (2).

4. A racket force fatigue testing machine according to claim 1, It is characterized in that The racket fixing fixture (11) comprises a rear fixture fixed to the peripheral side of the rotating shaft (10), a front fixture slidably matched to the front side of the rear fixture, and a through hole (110) provided on the inner sides of the rear fixture and the front fixture relative to each other.

5. A racket force fatigue testing machine according to claim 4, It is characterized in that The clamp fixing assembly (12) comprises four rear L-shaped blocks (111) fixed to the circumferential sides of the four diagonal positions of the rear clamp, a front L-shaped block (112) slidably fitted to the middle of the front ends of the four rear L-shaped blocks (111), a fixing rod (113) fixed to the middle of the rear ends of the front L-shaped blocks (112), a plate body (114) fixed to the rear ends of the four fixing rods (113), a screw rod (116) threadedly fitted to the middle of the plate body (114), and a motor (115) fixed to the rear end of the screw rod (116).

6. A racket force fatigue testing machine according to claim 5, It is characterized in that The inner sides of the front ends of the four front L-shaped blocks (112) are fixedly connected to the four diagonal parts of the front clamp, the rear ends of the front L-shaped blocks (112) are slidably fitted in the middle of the front end of the rear L-shaped blocks (111), the rear end of the fixing rod (113) passes through the middle of the rear L-shaped blocks (111), and the front end of the screw rod (116) is rotationally fitted in the middle of the rear clamp.

7. The racket force fatigue testing machine according to claim 1, It is characterized in that A slide rail is provided in the middle of the upper side of the base (1), and the front and rear sliding seats (13) are slidably fitted on the upper side of the slide rail. The front and rear sliding seats (13) are located in the middle of the machine body (2).

8. The racket force fatigue testing machine according to claim 1, It is characterized in that An electric slide rail (17) is provided on the front side of the front and rear sliding seats (13), and the fixing block (14) is slidably matched with one side of the electric slide rail (17).

9. The racket force fatigue testing machine according to claim 1, It is characterized in that A groove (19) is provided in the middle of the base (1), and a clamping assembly (18) drivingly connected to the two sliding seat fixing plates (16) is installed in the groove (19).

10. A racket force fatigue testing machine according to claim 9, It is characterized in that The clamping assembly (18) includes a rotary motor (181) fixed to the inner bottom of the groove (19), a gear (182) fixed to the output end of the rotary motor (181), and two tooth plates (183) slidably fitted to the inner bottom of the groove (19), the two tooth plates (183) being arranged opposite to each other, the gear (182) being located between the two tooth plates (183) and meshing with them, and the opposite ends of the two tooth plates (183) are respectively fixed to the lower sides of the two sliding seat fixing plates (16).

Images