Running shoe testing machine and running shoe stability testing method

Abstract

The invention provides a running shoe testing machine, and belongs to the technical field of running shoe testing. The running shoe testing machine comprises a base, a seat plate, a support frame, a lifting rod, a foot model and a driving device, wherein the seat plate is arranged on the base, the bottom of the supporting frame is connected with the base, and the lifting rod is in sliding connection with the supporting frame and can move upwards under the action of the driving device; and the foot model is arranged at the bottom of the lifting rod. A running shoe to be tested is arranged on the foot model in a sleeving mode, after the driving device drives the lifting rod to move upwards to the preset height, the lifting rod can drive the foot model to fall together, the foot model falls on the seat plate, and therefore the process that the foot falls on the ground during running is simulated. The performance of the running test shoe can be evaluated by collecting various data of the foot model when the shoe falls to the ground. According to the running shoe stability testing method provided by the invention, the running shoe testing machine is adopted, and the stability of the running shoes can be accurately evaluated by using the method; therefore, data reference is provided for improved design.

Description

Technical Field

[0001] The present invention relates to the field of running shoe testing, and in particular to a running shoe testing machine and a running shoe stability testing method. Background Art

[0002] Running shoes are essential equipment for runners. A good pair of running shoes can directly improve the running performance of runners and reduce sports injuries. After the running shoes are designed, their performance needs to be tested. If real people are used for testing, it may cause damage to the tester's feet. Therefore, it is necessary to design a test machine specifically for testing the performance of running shoes. Summary of the invention

[0003] The object of the present invention is to provide a running shoe testing machine and a running shoe stability testing method, which can be used to test the performance of running shoes.

[0004] The present invention is achieved in that:

[0005] A running shoe testing machine, comprising:

[0006] Base;

[0007] A support frame, the support frame is connected to the base and is located above the base;

[0008] A lifting rod, the lifting rod is slidably connected to the support frame and can move up and down;

[0009] A foot model, the foot model is arranged at the lower end of the lifting rod, and the running shoes to be tested can be put on the foot model;

[0010] A driving device, the driving device is connected to the support frame and can drive the lifting rod to a preset height;

[0011] A seat plate is connected to the base and is located below the foot model. When the lifting rod descends, the foot model can fall onto the seat plate.

[0012] Furthermore, it also includes a counterweight part and an armature, and the counterweight part and the armature are both connected to the lifting rod; the driving device includes a telescopic rod, and an electromagnet is arranged at the lower end of the telescopic rod; the electromagnet can be attracted or separated from the armature.

[0013] Furthermore, it also includes a locking device, which includes a strip plate, a lifting seat and a locking plate;

[0014] The strip plate is vertically arranged and fixedly connected to the support frame, and a plurality of locking grooves are arranged at intervals on the strip plate;

[0015] The lifting seat is fixedly connected to the lifting rod, one end of the locking plate is rotatably connected to the lifting seat, and the free end of the locking plate can swing up and down;

[0016] A limit block and a spring are arranged on the lifting seat, wherein the limit block is arranged above the locking plate, and the spring makes the free end of the locking plate have a tendency to swing upwards, and makes the locking plate abut against the limit block;

[0017] When the locking plate abuts against the limiting block, the free end of the locking plate is inserted into the corresponding locking groove, so that the lifting rod cannot move downward;

[0018] When the free end of the locking plate is rotated downward, the free end of the locking plate can be disengaged from the corresponding locking groove, so that the lifting rod can move downward freely.

[0019] Further, the locking plate is rotatably connected to the lifting seat via a rotating shaft, a handle is provided at the end of the rotating shaft, a middle part of the handle is fixedly connected to the rotating shaft, a first connecting part is provided at the first end of the handle, and a second connecting part is provided on the lifting seat, when the handle is rotated to the unlocking position, the first connecting part and the second connecting part are attracted, and the free end of the locking plate is disengaged from the locking groove;

[0020] One of the first connecting part and the second connecting part is a magnet, and the other is a magnet or an armature;

[0021] A push rod is provided on the base. When the lifting rod moves downward to the lower limit position, the push rod can touch the second end of the handle, so that the first connecting part and the second connecting part are disengaged; the handle returns to the locking position under the action of the spring, and the free end of the locking plate is stuck in the locking groove.

[0022] Furthermore, a vertical guide rod is provided on the support frame, a linear bearing is sleeved on the guide rod, and the lifting rod is fixedly connected to the outer ring of the linear bearing.

[0023] Furthermore, the bottom of the support frame is hinged to the base; a flip plate is also provided at the end of the base, the flip plate is a strip plate extending along the width direction of the base, and the flip plate is rotatably connected to the base through a horizontal axis;

[0024] The flip plate is provided with a push rod structure, one end of the push rod structure is hinged to the support frame, and the other end is connected to the flip plate.

[0025] Furthermore, a lifting structure is provided on the base, and the seat plate is connected to the base through the lifting structure.

[0026] Furthermore, the lifting rod is also provided with a circular connecting plate, and a plurality of connecting rods are arranged on the connecting plate. The plurality of connecting rods surround the lifting rod and are arranged vertically; the connecting rods can move up and down and be fixed at a preset position;

[0027] The foot model is connected to the lower end of the lifting rod through a ball joint. A plurality of connection parts are arranged on the upper end of the foot model. The plurality of connection parts surround the lifting rod. The plurality of connection parts correspond to the plurality of connection rods one by one and are connected through tension springs.

[0028] Furthermore, a plurality of sensors are arranged on the inner side of the foot model for detecting the bottom contact angle, the maximum rear foot angle and the peak angular velocity of the foot model.

[0029] A running shoe stability testing method, using the running shoe testing machine, comprises the following steps:

[0030] Collect the data of the first t milliseconds during the foot model contacting the ground, the data including the contact angle T A , maximum hindfoot angle M RA , reaching M RA Time T MRA , total hindfoot motion T RM , peak angular velocity V PEAK ;

[0031] Define the stability index as W;

[0032]

[0033] The values ​​of n, m, p, q, and r are 0.8-1.2.

[0034] The beneficial effects of the present invention are:

[0035] The running shoe tester obtained by the above design of the present invention, when in use, after the running shoe to be tested is set on the foot model, the lifting rod is lifted to a preset height by a driving device, and then the lifting rod is lowered, and the lifting rod and the foot model fall to the seat plate together, thereby simulating the process of the foot landing when running. By collecting various data of the foot model when landing, the performance of the running test shoe can be evaluated; or, by repeatedly simulating the running process, the anti-fatigue performance and service life of the running shoe can also be tested.

[0036] The running shoe stability testing method provided in the present application adopts the above-mentioned running shoe testing machine. The method can accurately evaluate the stability of the running shoe, thereby providing data reference for improving the design. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 is a three-dimensional diagram from a first angle of a running shoe testing machine provided by an embodiment of the present invention;

[0039] Figure 2 It is a stereoscopic view of the running shoe testing machine provided by the embodiment of the present invention at a second angle (the strip plate is disassembled from the assembly).

[0040] Figure 3 It is a schematic diagram of the angle between the median vertical line of the leg and the median vertical line of the sole when the runner's foot lands on the ground;

[0041] Figure 4 This is a graph showing the change in rear foot angle over time from the moment the runner’s foot strikes the ground;

[0042] Figure 5 This is a graph showing the change in rear foot angular velocity over time from the moment a runner's foot strikes the ground.

[0043] Icons: 1-base; 12-flip plate; 13-lifting structure; 131-lifter; 132-connecting shaft; 2-support frame; 21-vertical rod; 22-connecting rod; 23-guide rod; 24-linear bearing; 3-lifting rod; 31-counterweight; 32-armature; 4-driving device; 41-telescopic rod; 411-electromagnet; 42-mounting frame; 5-foot model; 6-seat plate; 7-locking device; 71-strip plate; 711-locking groove; 72-lifting seat; 721-first connecting part; 73-locking plate; 74-handle; 741-first end; 742-second end; 8-top rod; 9-push rod structure. DETAILED DESCRIPTION

[0044] Embodiment 1:

[0045] like Figure 1 and Figure 2, this embodiment provides a running shoe tester, which is used to test the performance of running shoes. The above-mentioned running shoe tester includes a base 1, a seat plate 6, a support frame 2, a lifting rod 3, a foot model 5 and a driving device 4; wherein, the seat plate 6 is arranged on the base 1, the bottom of the support frame 2 is connected to the base 1, the lifting rod 3 is slidably connected to the support frame 2, and can move upward under the action of the driving device 4; the foot model 5 is arranged at the bottom of the lifting rod 3. The running shoe cover to be tested is arranged on the foot model 5, and after the driving device 4 drives the lifting rod 3 to move upward to a preset height, the lifting rod 3 can fall with the foot model 5, and the foot model 5 falls on the seat plate 6, thereby simulating the process of the foot landing when running.

[0046] The base 1 is a rectangular parallelepiped frame structure formed by welding profiles, which includes four supporting legs, and the seat plate 6 is a rectangular plate, which is arranged on the base 1. In order to facilitate the adjustment of the height of the seat plate 6 relative to the base 1, a lifting structure 13 is arranged below the seat plate 6, and the seat plate 6 is arranged on the lifting structure 13, and the lifting structure 13 drives the seat plate 6 to move up and down.

[0047] Specifically, the lifting structure 13 includes four lifters 131, and all of the four lifters 131 are worm gear structures. Two mounting plates are provided in the middle of the base 1, and the mounting plates are rectangular strip plates 71, which extend along the width direction of the base 1; the two mounting plates are arranged at intervals. The lifter 131 includes a shell, a lifting rod 3 and a driving rod, and the shell of the lifter 131 is fixedly arranged on the mounting plate; the lifting rod 3 is arranged vertically, and the upper end of each lifting rod 3 is connected to the seat plate 6, so that the lifting rod 3 can drive the seat plate 6 to move up and down. The four lifters 131 are divided into two groups, and the driving rods of each group of lifters 131 are connected by a connecting shaft 132, and then the two connecting shafts 132 are connected by a synchronous belt, so that the lifting rods 3 of the four lifters 131 can be lifted and lowered synchronously.

[0048] The support frame 2 includes two vertical rods 21 and a connecting rod 22 , wherein the bottoms of the two vertical rods 21 are respectively connected to the base 1 , and the upper ends of the two vertical rods 21 are fixedly connected via the connecting rod 22 .

[0049] The driving device 4 includes a mounting frame 42 and two telescopic rods 41, wherein the mounting frame 42 is an inverted U-shaped structure, and the bottom of the mounting frame 42 is connected to the upper part of the two vertical rods 21; the upper ends of the two telescopic rods 41 are connected to the upper part of the mounting frame 42, and the lower ends are provided with electromagnets 411.

[0050] The lifting rod 3 is vertically arranged below the driving device 4, and vertical guide rods 23 are arranged on both sides thereof, and the guide rods 23 are fixedly connected to the support frame 2; the lifting rod 3 is slidably connected to the guide rods 23 through linear bearings 24. A counterweight support plate is arranged on the lifting rod 3, and a plurality of counterweight blocks 31 are arranged on the counterweight support plate. Two armatures 32 are also arranged on the upper part of the lifting rod 3, and the two armatures 32 are respectively located below the two electromagnets 411. When the telescopic rod 41 is extended, the electromagnet 411 moves downward to the position of the armature 32, and the electromagnet 411 is energized to adsorb the armature 32; at this time, when the telescopic rod 41 is retracted upward, the telescopic rod 41 drives the lifting rod 3 and the counterweight part to move upward together. After moving to the preset position, the electromagnet 411 is powered off, and under the action of gravity, the counterweight part and the lifting rod 3 fall freely, thereby simulating the process of the leg falling.

[0051] When the lifting rod 3 and the counterweight are pulled to the upper position by the driving device 4, if there is an unexpected power outage or someone accidentally touches the switch button, it may cause the lifting rod 3 and the counterweight to fall accidentally; at this time, if the hand is at the bottom, it may cause a serious safety accident. Therefore, the running shoe testing machine is also provided with a locking device 7. After the locking device 7 locks the lifting rod 3, even if the electromagnet 411 is accidentally powered off, the lifting rod 3 and the counterweight will not fall; and the locking device 7 does not affect the upward movement of the lifting rod 3.

[0052] Specifically, the locking device 7 includes a strip plate 71, a lifting seat 72 and a locking plate 73, wherein the strip plate 71 is vertically arranged on one side of the lifting rod 3 and is fixedly connected to the support frame 2, and a plurality of locking grooves 711 are evenly spaced on the strip plate 71. The lifting seat 72 is fixedly connected to the lifting rod 3, one end of the locking plate 73 is rotatably connected to the lifting seat 72 through a horizontally arranged rotating shaft, and the other end is a free end that can swing up and down.

[0053] A limit block and a spring are also provided on the lifting seat 72, and the limit block is provided above the locking plate 73. The spring makes the free end of the locking plate 73 have a tendency to swing upward, and makes the locking plate 73 abut against the limit block; when the locking plate 73 abuts against the limit block, the free end of the locking plate 73 tilts downward. When the locking plate 73 abuts against the limit block, it is in a locked position, and at this time, the free end of the locking plate 73 is stuck in the corresponding locking groove 711. Since the limit block prevents the locking plate 73 from swinging upward, the lifting rod 3 and the lifting seat 72 cannot move downward at this time; in addition, since the locking plate 73 can swing downward, the lifting rod 3 and the lifting seat 72 can move upward.

[0054] When the lifting rod 3 and the counterweight part need to be lowered, the locking device 7 needs to be unlocked first, that is, the locking plate 73 needs to be removed from the locking groove 711. To this end, a handle 74 is provided at the end of the rotating shaft of the locking plate 73, the middle part of the handle 74 is fixedly connected to the rotating shaft, the first end 741 of the handle 74 is provided with a first connecting part 721, and the lifting seat 72 is provided with a second connecting part. When the handle 74 is rotated to the unlocking position, the upper part of the first connecting part 721 is attracted to the lower part of the second connecting part, and at this time, the locking plate 73 rotates with the rotating shaft, and its free end is removed from the locking groove 711. In this embodiment, the first connecting part 721 is a magnet, and the second connecting part is the armature 32; and the adsorption force of the first connecting part 721 and the second connecting part is greater than the elastic force of the spring.

[0055] In order to make the locking device 7 automatically reset to the locked position after the lifting rod 3 is lowered, a push rod 8 is provided on the base 1. When the lifting rod 3 moves downward to the lower limit position, the push rod 8 can touch the second end 742 of the handle 74. The thrust of the push rod 8 causes the first connecting part 721 to disengage from the second connecting part. Under the action of the spring, the rotating shaft drives the handle 74 and the locking plate 73 to reset to the locked position. At this time, the free end of the locking plate 73 is inserted into the corresponding locking groove 711, thereby realizing automatic locking.

[0056] Furthermore, the bottom of the support frame 2 is hinged to the base 1, so that the angle of the support frame 2 relative to the base 1 can be adjusted. Specifically, the bottoms of the two vertical rods 21 of the support frame 2 are connected to the base 1 through bearings. In addition, a flip plate 12 is provided at the end of the base 1; the flip plate 12 is a strip plate 71, which extends along the width direction of the base 1 and is rotatably connected to the base 1 through a horizontal axis. A push rod structure 9 is provided on the flip plate 12, one end of the push rod structure 9 is connected to the support frame 2, and the other end is connected to the flip plate 12; the push rod structure 9 can adopt a worm gear lifter 131.

[0057] In addition, the lower part of the mounting frame 42 of the driving device 4 and the upper part of the vertical rod 21 of the support frame 2 are also hinged through a rotating shaft; an adjusting rod is set at the end of the rotating shaft, and the angle of the mounting frame 42 can be adjusted by rotating the adjusting rod; after adjusting to the preset angle, the adjusting rod is fixed to the support frame 2.

[0058] Furthermore, a circular connecting plate is sleeved on the lifting rod 3, and a plurality of connecting rods 22 are arranged on the connecting plate, and the plurality of connecting rods 22 surround the lifting rod 3 and are arranged vertically; the connecting rods 22 can move up and down and be fixed at a preset position. The foot model 5 is connected to the lower end of the lifting rod 3 through a ball joint, and a plurality of connecting parts are arranged on the upper end of the foot model 5, and the plurality of connecting parts surround the lifting rod 3, and the plurality of connecting parts correspond to the plurality of connecting rods 22 one by one, and are connected through a tension spring.

[0059] By adjusting the position of the connecting rod 22, the preload force of the tension spring can be adjusted, thereby simulating the running state of runners with different muscle strengths.

[0060] In addition, the entire running shoe testing machine is also provided with a controller, and a plurality of sensors are provided on the foot model 5 and the lifting rod 3, which are used to detect the bottom contact angle, maximum rear foot angle, peak angular velocity and impact force of the foot model 5 in real time. Figure 3 Schematic diagram of the angle between the median vertical line of the leg and the median vertical line of the sole when the runner's foot lands.

[0061] The controller is connected to each sensor to collect the detection data of the sensor; the controller draws two graphs based on the collected data. The first is a graph of the change of the rear foot angle over time from the moment the runner's foot lands (corresponding to Figure 4 ). The second is the curve of the rear foot angular velocity changing with time when the runner's foot lands (corresponding to Figure 5 ).

[0062] Embodiment 2:

[0063] This embodiment provides a running shoe stability testing method, which uses the running shoe testing machine provided in Embodiment 1; the method comprises the following steps:

[0064] Collect the data of the first t milliseconds during the foot model contacting the ground, the data including the contact angle T A , maximum hindfoot angle M RA , reaching M RA Time T MRA , total hindfoot motion T RM , peak angular velocity V PEAK ;

[0065] Define the stability index as W;

[0066]

[0067] The values ​​of n, m, p, q, and r are 0.8-1.2; for example, 0.8, 1, or 1.2

[0068] The larger the W value is, the better the stability is.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A running shoe testing machine, characterized in that: include: Base; A support frame, the support frame is connected to the base and is located above the base; A lifting rod, the lifting rod is slidably connected to the support frame and can move up and down; A foot model, the foot model is arranged at the lower end of the lifting rod, and the running shoes to be tested can be put on the foot model; A driving device, the driving device is connected to the support frame and can drive the lifting rod to a preset height; A seat plate is connected to the base and is located below the foot model. When the lifting rod descends, the foot model can fall onto the seat plate.

2. The running shoe testing machine according to claim 1, characterized in that: It also includes a counterweight part and an armature, both of which are connected to the lifting rod; the driving device includes a telescopic rod, and an electromagnet is arranged at the lower end of the telescopic rod; the electromagnet can be attracted or separated from the armature.

3. The running shoe testing machine according to claim 2, characterized in that: Also included is a locking device, the locking device comprising a strip plate, a lifting seat and a locking plate; The strip plate is vertically arranged and fixedly connected to the support frame, and a plurality of locking grooves are arranged at intervals on the strip plate; The lifting seat is fixedly connected to the lifting rod, one end of the locking plate is rotatably connected to the lifting seat, and the free end of the locking plate can swing up and down; A limit block and a spring are arranged on the lifting seat, wherein the limit block is arranged above the locking plate, and the spring makes the free end of the locking plate have a tendency to swing upwards, and makes the locking plate abut against the limit block; When the locking plate abuts against the limiting block, the free end of the locking plate is inserted into the corresponding locking groove, so that the lifting rod cannot move downward; When the free end of the locking plate is rotated downward, the free end of the locking plate can be disengaged from the corresponding locking groove, so that the lifting rod can move downward freely.

4. The running shoe testing machine according to claim 3, characterized in that: The locking plate is rotatably connected to the lifting seat via a rotating shaft, a handle is provided at the end of the rotating shaft, a middle part of the handle is fixedly connected to the rotating shaft, a first connecting part is provided at the first end of the handle, and a second connecting part is provided on the lifting seat, when the handle is rotated to an unlocking position, the first connecting part and the second connecting part are attracted, and the free end of the locking plate is disengaged from the locking groove; One of the first connecting part and the second connecting part is a magnet, and the other is a magnet or an armature; A push rod is provided on the base. When the lifting rod moves downward to the lower limit position, the push rod can touch the second end of the handle, so that the first connecting part and the second connecting part are disengaged; the handle returns to the locking position under the action of the spring, and the free end of the locking plate is stuck in the locking groove.

5. The running shoe testing machine according to claim 2, characterized in that: A vertical guide rod is arranged on the support frame, a linear bearing is sleeved on the guide rod, and the lifting rod is fixedly connected to the outer ring of the linear bearing.

6. The running shoe testing machine according to claim 1, characterized in that: The bottom of the support frame is hinged to the base; a flip plate is also provided at the end of the base, the flip plate is a strip plate extending along the width direction of the base, and the flip plate is rotatably connected to the base through a horizontal axis; The flip plate is provided with a push rod structure, one end of the push rod structure is hinged to the support frame, and the other end is connected to the flip plate.

7. The running shoe testing machine according to claim 1, characterized in that: The base is provided with a lifting structure, and the seat plate is connected to the base through the lifting structure.

8. The running shoe testing machine according to claim 1, characterized in that: The lifting rod is also sleeved with a circular connecting plate, on which a plurality of connecting rods are arranged, the plurality of connecting rods surround the lifting rod and are arranged vertically; the connecting rods can move up and down and be fixed at a preset position; The foot model is connected to the lower end of the lifting rod through a ball joint. A plurality of connection parts are arranged on the upper end of the foot model. The plurality of connection parts surround the lifting rod. The plurality of connection parts correspond to the plurality of connection rods one by one and are connected through tension springs.

9. The running shoe testing machine according to claim 8, characterized in that: A plurality of sensors are arranged on the inner side of the foot model for detecting the bottom contact angle, the maximum rear foot angle and the peak angular velocity of the foot model.

10. A running shoe stability testing method, using the running shoe testing machine according to claim 9, comprising the following steps: Collect the data of the first t milliseconds during the foot model contacting the ground, the data including the contact angle T A , maximum hindfoot angle M RA , reaching M RA Time T MRA , total hindfoot motion T RM , peak angular velocity V PEAK ; Define the stability index as W; The values ​​of n, m, p, q, and r are 0.8-1.2.

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