A device for testing the multidirectional grip characteristics of a shoe sole

Abstract

The application discloses a kind of sole multidirectional ground gripping characteristic testing devices, the device includes rack, X-axis translation mechanism, Y-axis translation mechanism, rolling piece, Z-axis loading mechanism, sole model and multi-axis force sensor.Y-axis guide seat is vertically arranged relative to X-axis guide seat, Y-axis guide seat is equipped with Y-axis guide block with X-axis guide seat sliding cooperation, and X-axis drive assembly drives Y-axis guide block reciprocating movement.Rolling piece is arranged between Y-axis guide block and X-axis guide seat, and sliding friction is converted into rolling friction.Z-axis loading mechanism is arranged in Y-axis guide seat, and its driving end is connected with sole model.Multi-axis force sensor is arranged between the driving end of Z-axis loading mechanism and sole model, for detecting the three-dimensional force suffered by sole model.The application realizes omnidirectional vector ground gripping force test by double-axis linkage, eliminates mechanical transmission interference by setting sensor at power end, reduces moving resistance by cooperating with rolling piece, effectively improves test precision and repeatability.

Description

Technical Field

[0001] This invention relates to the field of shoe sole testing technology, and more specifically to a shoe sole multi-directional grip characteristic testing device. Background Technology

[0002] Grip characteristics are a key indicator for measuring the performance of the interface between athletic shoes and sports fields. Currently, industry testing procedures mainly include linear translation grip tests and vertical axis rotation grip tests.

[0003] Current grip testing devices primarily consist of a test head, a guiding device, a drive unit, and a measurement system. However, during operation, the sensors are positioned at the front of the drive actuator or guide rail, resulting in the acquisition signal being contaminated with a significant amount of frictional resistance from the mechanical transmission components such as the lead screw, slider, and guide rail. This leads to a low proportion of effective frictional force signal, poor signal-to-noise ratio in the raw data, and the sensor's inability to accurately separate the true interface force of the shoe sole, severely impacting test accuracy.

[0004] Meanwhile, the existing device uses a surface contact sliding fit between the sliding block and the guide seat. When horizontal traction is performed under a large vertical normal force, the sliding friction increases significantly, which consumes the effective drive output and is prone to causing system vibration and speed fluctuations, interfering with data acquisition and resulting in poor test repeatability. Therefore, it needs to be improved. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a multi-directional grip characteristic testing device for shoe soles.

[0006] To achieve the above objectives, the present invention provides the following technical solution: 1. A device for testing the multi-directional grip characteristics of shoe soles, comprising: frame; The X-axis translation mechanism includes an X-axis guide seat and an X-axis drive assembly. The Y-axis translation mechanism includes a Y-axis guide seat and a Y-axis drive assembly. The Y-axis guide seat is vertically arranged relative to the X-axis guide seat. The Y-axis guide seat is provided with a Y-axis guide block that slides and engages with the X-axis guide seat. The X-axis drive assembly is connected to the Y-axis guide seat and drives the Y-axis guide block to reciprocate. A rolling element is disposed between the Y-axis guide block and the X-axis guide seat. The Y-axis guide block abuts against the X-axis guide seat through the rolling element. When the X-axis drive assembly drives the Y-axis guide block to reciprocate, the rolling element rolls along the surface of the X-axis guide seat. A Z-axis loading mechanism is disposed on a Y-axis guide seat and connected to a Y-axis drive assembly. The Z-axis loading mechanism includes a drive end, which is used to output load along the Z-axis direction. A foot model, which is connected to a drive end, has a bottom surface that forms an mounting surface for mounting the sole of the shoe to be tested. A multi-axis force sensor is disposed between the drive end and the foot model, and the multi-axis force sensor is used to detect the forces acting on the foot model in the X-axis, Y-axis and Z-axis directions.

[0007] As a further improvement of the present invention, the rolling element is a plurality of balls embedded in the bottom of the Y-axis guide block, and the balls make rolling contact with the bottom surface of the inner wall of the X-axis guide seat.

[0008] As a further improvement of the present invention, the X-axis drive assembly includes a first motor and a first threaded post. The first motor is fixedly installed at one end of the X-axis guide seat, the first threaded post is fixedly connected to the output end of the first motor, and the first threaded post is threadedly engaged with the Y-axis guide block. The Y-axis drive assembly includes a second motor and a second threaded post. The second motor is fixedly mounted on one end of the Y-axis guide seat, and the second threaded post is fixedly connected to the output end of the second motor, and the second threaded post is threadedly engaged with the Y-axis guide seat.

[0009] As a further improvement of the present invention, the Z-axis loading mechanism is a drive cylinder or an electric cylinder.

[0010] As a further improvement of the present invention, an anti-slip pad is fixedly connected to the bottom of the foot model.

[0011] As a further improvement of the present invention, a movable component disposed on the side of the frame is also included, the movable component comprising: A limiting sleeve is fixedly connected to the side of the frame; A lifting column, wherein the lifting column is movably sleeved within the limiting sleeve, and a sliding wheel is installed at the bottom end of the lifting column; A locking structure is provided between the limiting sleeve and the lifting column. The locking structure is used to lock the lifting column in the extended position where the sliding wheel contacts the ground, or in the retracted position where the sliding wheel is suspended in the air.

[0012] As a further improvement of the present invention, the locking structure includes: A retaining plate, which is fixedly connected to the inner wall of the limiting sleeve; A locking block, which is movably disposed on the inner side of the lifting column; A conical block, wherein the conical block is disposed inside the lifting column and cooperates with the locking block; A reset spring is disposed inside the lifting column and is used to drive the locking block to reset.

[0013] As a further improvement of the present invention, it also includes a control host and a display screen, wherein the signal input terminal of the control host is connected to the signal output terminal of the multi-axis force sensor, and the signal output terminal of the control host is connected to the signal input terminal of the display screen.

[0014] As a further improvement of the present invention, the bottom of the frame is fixedly connected with anti-slip feet.

[0015] The beneficial effects of this invention are: 1. Through the X-axis translation mechanism, Y-axis translation mechanism, and Z-axis loading mechanism, a composite displacement vector at any angle in three-dimensional space can be simulated, realistically reproducing the lateral slip state of athletes during actions such as sudden stops, side cuts, and changes of direction. Combined with multi-axis force sensors for simultaneous acquisition of forces in the X, Y, and Z axes, a comprehensive evaluation of the multi-directional grip characteristics of the shoe sole is achieved. 2. By placing a multi-axis force sensor between the drive end and the foot model, the sensor is positioned close to the contact interface between the sole and the ground, directly acquiring vertical pressure, horizontal X-axis force, and horizontal Y-axis force. This arrangement ensures that the original signal originates directly from the sole interface, completely eliminating interference from the frictional resistance of the mechanical transmission components. Combined with a friction-reducing design that converts sliding friction into rolling friction using rolling elements, the influence of parasitic forces on sensor data is further eliminated, significantly improving the accuracy and repeatability of test results. 3. By installing rolling elements between the Y-axis guide block and the X-axis guide seat, the Y-axis guide block abuts against the X-axis guide seat through the rolling elements. When the X-axis drive assembly drives the Y-axis guide block to reciprocate, the rolling elements roll along the surface of the X-axis guide seat, transforming the original surface contact sliding friction into point contact rolling friction. This greatly reduces the resistance during the overall movement of the Y-axis guide block and the Y-axis guide seat fixed to it, reduces internal mechanical noise, avoids interference from friction-induced vibrations to the high-sensitivity sensor, and further improves the accuracy of friction force test results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall installation of the present invention; Figure 2 This is a schematic diagram of the installation of the rolling element of the present invention; Figure 3 This is a schematic cross-sectional view of the installation of the multi-axis force sensor of the present invention; Figure 4 This is a schematic diagram of the mobile component of the present invention.

[0017] Reference numerals: 1. Frame; 2. Anti-slip foot; 3. X-axis guide seat; 4. Y-axis guide block; 5. First motor; 6. First threaded column; 7. Y-axis guide seat; 8. Second motor; 9. Second threaded column; 10. Y-axis sliding block; 11. Drive cylinder; 12. Foot model; 13. Multi-axis force sensor; 14. Rolling element; 15. Anti-slip pad; 16. Limit sleeve; 17. Lifting column; 18. Sliding wheel; 19. Clamping plate; 20. Clamping block; 21. Conical block; 22. Return spring; 23. Handle; 24. Control block; 25. Pressing plate; 26. Lifting rod; 27. Control host; 28. Display screen. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals.

[0019] See Figure 1-4 This embodiment provides a multi-directional grip characteristic testing device for shoe soles, including a frame 1, an X-axis translation mechanism, a Y-axis translation mechanism, a rolling element 14, a Z-axis loading mechanism, a foot model 12, and a multi-axis force sensor 13.

[0020] The bottom of the frame 1 is fixedly connected to anti-slip feet 2. The anti-slip feet 2 are used to make rigid contact with the ground during testing, providing a stable support base and preventing displacement or vibration of the device during testing.

[0021] The X-axis translation mechanism includes an X-axis guide seat 3 and an X-axis drive assembly. The X-axis guide seat 3 is fixedly mounted on the frame 1, and there are two X-axis guide seats 3 arranged parallel to each other. The X-axis drive assembly includes a first motor 5 and a first threaded post 6. The first motor 5 is fixedly mounted on one end of the X-axis guide seat 3, and the first threaded post 6 is fixedly connected to the output shaft of the first motor 5.

[0022] The Y-axis translation mechanism includes a Y-axis guide seat 7 and a Y-axis drive assembly. The Y-axis guide seat 7 is vertically positioned relative to the X-axis guide seat 3. A Y-axis guide block 4 is mounted on the Y-axis guide seat 7, and the Y-axis guide block 4 is movably disposed within the X-axis guide seat 3, with the Y-axis guide block 4 slidingly engaging with the X-axis guide seat 3. The Y-axis guide block 4 is threadedly engaged with a first threaded post 6. When the first motor 5 drives the first threaded post 6 to rotate, the Y-axis guide block 4 reciprocates along the X-axis direction, thereby driving the entire Y-axis guide seat 7 and all components mounted on it to move synchronously along the X-axis direction.

[0023] The Y-axis drive assembly includes a second motor 8 and a second threaded post 9. The second motor 8 is fixedly mounted on one end of the Y-axis guide seat 7, and the second threaded post 9 is fixedly connected to the output shaft of the second motor 8. A Y-axis sliding block 10 is movably disposed inside the Y-axis guide seat 7. The Y-axis sliding block 10 is threadedly engaged with the second threaded post 9. When the second motor 8 drives the second threaded post 9 to rotate, the Y-axis sliding block 10 reciprocates along the Y-axis direction.

[0024] Rolling elements 14 are disposed between the Y-axis guide block 4 and the X-axis guide seat 3. Specifically, the rolling elements 14 are multiple balls embedded in the bottom of the Y-axis guide block 4, and the balls make rolling contact with the bottom inner wall of the X-axis guide seat 3. The Y-axis guide block 4 abuts against the X-axis guide seat 3 through the rolling elements 14. When the X-axis drive assembly drives the Y-axis guide block 4 to reciprocate along the X-axis direction, the rolling elements 14 roll along the bottom inner wall of the X-axis guide seat 3, converting the surface contact sliding friction between the Y-axis guide block 4 and the X-axis guide seat 3 into point contact rolling friction.

[0025] The Z-axis loading mechanism is mounted on the Y-axis guide seat 7 and connected to the Y-axis drive assembly. Specifically, the Z-axis loading mechanism is a drive cylinder 11, which is fixedly mounted on the top of the Y-axis sliding block 10 and moves synchronously with the Y-axis sliding block 10 along the Y-axis direction. The drive cylinder 11 has a drive end that outputs load along the Z-axis direction.

[0026] The foot model 12 is fixedly connected to the drive end of the drive cylinder 11, and the bottom surface of the foot model 12 forms an mounting surface for mounting the sole of the shoe to be tested. An anti-slip pad 15 is fixedly connected to the bottom of the foot model 12. The anti-slip pad 15 is made of silicone material and is located directly below the foot model 12. It is used to increase the friction between the sole of the shoe to be tested and the foot model 12, and to ensure the stability of the shoe position during the test.

[0027] A multi-axis force sensor 13 is disposed between the drive end of the drive cylinder 11 and the foot model 12. Specifically, the multi-axis force sensor 13 is fixedly installed between the bottom of the output end of the drive cylinder 11 and the foot model 12, that is, it is connected in series between the drive end of the drive cylinder 11 and the foot model 12. The multi-axis force sensor 13 is used to detect the forces acting on the foot model 12 in the X-axis, Y-axis and Z-axis directions.

[0028] A movable component is also provided on the side of the frame 1. The movable component includes a limiting sleeve 16, a lifting column 17, a sliding wheel 18, and a locking structure. The limiting sleeve 16 is fixedly connected to the side of the frame 1, and a locking plate 19 is fixedly connected to the inner wall of the limiting sleeve 16. The lifting column 17 is movably sleeved inside the limiting sleeve 16, and a sliding wheel 18 is installed at the bottom end of the lifting column 17. A handle 23 is fixedly connected to the top of the lifting column 17, a control block 24 is movably sleeved on the top of the handle 23, a pressing plate 25 is movably sleeved inside the handle 23, and a lifting rod 26 is movably sleeved at one end of the pressing plate 25. The locking structure is provided between the limiting sleeve 16 and the lifting column 17, and is used to lock the lifting column 17 in the extended position where the sliding wheel 18 contacts the ground, or in the retracted position where the sliding wheel 18 is suspended in the air. The locking structure includes a locking plate 19, a locking block 20, a conical block 21, and a return spring 22. The conical block 21 is fixedly connected to the bottom of the lifting rod 26, the locking block 20 is movably sleeved on the side of the lifting column 17, the conical block 21 is set inside the lifting column 17 and cooperates with the locking block 20, and the reset spring 22 is set inside the lifting column 17 and is used to drive the locking block 20 to reset.

[0029] A control host 27 is fixedly mounted on the front of the frame 1, and a display screen 28 is fixedly mounted on the front of the control host 27. The signal input terminal of the control host 27 is connected to the signal output terminal of the multi-axis force sensor 13, and the signal output terminal of the control host 27 is connected to the signal input terminal of the display screen 28. The control output terminal of the control host 27 is connected to the control input terminals of the first motor 5, the second motor 8, and the drive cylinder 11, respectively, for controlling the operation of the X-axis translation mechanism, the Y-axis translation mechanism, and the Z-axis loading mechanism.

[0030] This embodiment provides a device for testing the multi-directional grip characteristics of shoe soles, and its usage is as follows: During the sole grip characteristic test, the sole or the entire shoe to be tested is first fixed to the outside of the foot model 12. The anti-slip pad 15 increases the friction between the shoe and the foot model 12, ensuring the stability of the shoe position. Then, the drive cylinder 11 is activated, which drives the sole to be tested to make close contact with the ground through the foot model 12, applying a vertical normal load that meets the test requirements.

[0031] While maintaining a vertical load, the first motor 5 and / or the second motor 8 are controlled by the main control unit 27. The first motor 5 drives the Y-axis guide block 4 to move along the X-axis direction through the first threaded post 6, thereby driving the entire Y-axis guide seat 7 and the entire test assembly to move along the X-axis direction; the second motor 8 drives the Y-axis sliding block 10 to move along the Y-axis direction through the second threaded post 9, thereby driving the drive cylinder 11 and the foot model 12 to move along the Y-axis direction. When the two motors operate at different speeds simultaneously, the foot model 12 synthesizes vector motion in any direction in the horizontal plane, realistically simulating the lateral slip state of an athlete during sudden stops, side cuts, and changes of direction.

[0032] During the above process, the multi-axis force sensor 13 detects the forces acting on the foot model 12 in the X, Y, and Z axes in real time and transmits the detection signals to the control host 27. Since the multi-axis force sensor 13 is located at the very end between the drive end of the drive cylinder 11 and the foot model 12, the force it detects originates directly from the sole-ground contact interface, completely eliminating interference from the frictional resistance of the mechanical transmission components such as the upper threaded post and guide seat. Simultaneously, the rolling element 14 converts the sliding friction between the Y-axis guide block 4 and the X-axis guide seat 3 into rolling friction, further reducing the internal resistance of the system and ensuring the authenticity and accuracy of the detection data.

[0033] After receiving the detection signal from the multi-axis force sensor 13, the control host 27 processes and analyzes the data, calculates the friction coefficient under different motion directions, and displays it intuitively on the display screen 28 so that testers can evaluate the grip characteristics of the shoe sole under multi-directional force.

[0034] When the device needs to be moved between different test sites, the operator holds the handle 23 and presses the control block 24. The lifting rod 26 moves the conical block 21, which presses against the locking block 20 to extend it. The locking block 20 cooperates with the locking plate 19 to lock the lifting column 17 in the extended position. At this time, the sliding wheel 18 at the bottom of the lifting column 17 contacts the ground and protrudes from the bottom surface of the anti-slip foot 2, allowing the operator to push the device to move flexibly. When it is necessary to switch to the test state, the lifting rod 26 is driven to move in the opposite direction by pressing the plate 25. The conical block 21 disengages from the locking block 20, which retracts under the action of the return spring 22. The lifting column 17 can then freely retract into the limiting sleeve 16, suspending the sliding wheel 18 and contacting the anti-slip foot 2 with the ground, thus switching the device to a stable test state.

[0035] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A device for testing the multi-directional grip characteristics of shoe soles, characterized in that, include: Rack (1); The X-axis translation mechanism includes an X-axis guide seat (3) and an X-axis drive assembly. The Y-axis translation mechanism includes a Y-axis guide seat (7) and a Y-axis drive assembly. The Y-axis guide seat (7) is vertically arranged relative to the X-axis guide seat (3). The Y-axis guide seat (7) is provided with a Y-axis guide block (4) that slides and engages with the X-axis guide seat (3). The X-axis drive assembly is connected to the Y-axis guide seat (7) and drives the Y-axis guide block (4) to reciprocate. A rolling element (14) is disposed between the Y-axis guide block (4) and the X-axis guide seat (3). The Y-axis guide block (4) abuts against the X-axis guide seat (3) through the rolling element (14). When the X-axis drive assembly drives the Y-axis guide block (4) to reciprocate, the rolling element (14) rolls along the surface of the X-axis guide seat (3). Z-axis loading mechanism, the Z-axis loading mechanism is disposed on Y-axis guide seat (7) and connected to Y-axis drive assembly, the Z-axis loading mechanism includes a drive end, the drive end is used to output load along Z-axis direction; Foot model (12), the foot model (12) is connected to the drive end, and the bottom surface of the foot model (12) forms an mounting surface for mounting the sole of the shoe to be tested; A multi-axis force sensor (13) is disposed between the drive end and the foot model (12). The multi-axis force sensor (13) is used to detect the forces in the X-axis direction, Y-axis direction and Z-axis direction on the foot model (12).

2. The multi-directional grip characteristic testing device for shoe soles according to claim 1, characterized in that, The rolling element (14) consists of multiple balls embedded in the bottom of the Y-axis guide block (4), and the balls are in rolling contact with the bottom surface of the inner wall of the X-axis guide seat (3).

3. The multi-directional grip characteristic testing device for shoe soles according to claim 1, characterized in that, The X-axis drive assembly includes a first motor (5) and a first threaded post (6). The first motor (5) is fixedly installed at one end of the X-axis guide seat (3). The first threaded post (6) is fixedly connected to the output end of the first motor (5), and the first threaded post (6) is threadedly engaged with the Y-axis guide block (4). The Y-axis drive assembly includes a second motor (8) and a second threaded post (9). The second motor (8) is fixedly installed at one end of the Y-axis guide seat (7). The second threaded post (9) is fixedly connected to the output end of the second motor (8), and the second threaded post (9) is threadedly engaged with the Y-axis guide seat (7).

4. The multi-directional grip characteristic testing device for shoe soles according to claim 1, characterized in that, The Z-axis loading mechanism is a drive cylinder (11) or an electric cylinder.

5. The multi-directional grip characteristic testing device for shoe soles according to claim 1, characterized in that, The bottom of the foot model (12) is fixedly connected to an anti-slip pad (15).

6. The multi-directional grip characteristic testing device for shoe soles according to claim 1, characterized in that, It also includes a movable assembly disposed on the side of the frame (1), the movable assembly comprising: Limiting sleeve (16), the limiting sleeve (16) is fixedly connected to the side of the frame (1); A lifting column (17) is movably sleeved inside the limiting sleeve (16), and a sliding wheel (18) is installed at the bottom end of the lifting column (17). A locking structure is provided between the limiting sleeve (16) and the lifting column (17). The locking structure is used to lock the lifting column (17) in the extended position where the sliding wheel (18) contacts the ground, or in the retracted position where the sliding wheel (18) is suspended in the air.

7. The multi-directional grip characteristic testing device for shoe soles according to claim 6, characterized in that, The locking structure includes: A retaining plate (19) is fixedly connected to the inner wall of the limiting sleeve (16); A locking block (20) is movably disposed on the inner side of the lifting column (17); A conical block (21) is disposed inside the lifting column (17) and cooperates with the locking block (20); A reset spring (22) is disposed inside the lifting column (17) and is used to drive the locking block (20) to reset.

8. The multi-directional grip characteristic testing device for shoe soles according to claim 1, characterized in that, It also includes a control host (27) and a display screen (28). The signal input terminal of the control host (27) is connected to the signal output terminal of the multi-axis force sensor (13), and the signal output terminal of the control host (27) is connected to the signal input terminal of the display screen (28).

9. The multi-directional grip characteristic testing device for shoe soles according to claim 1, characterized in that, The bottom of the frame (1) is fixedly connected with anti-slip feet (2).

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