A dynamic loading test chamber for floor impact and rolling loads

Abstract

This invention discloses a dynamic loading test chamber for floor impact and rolling load testing, belonging to the field of solid material mechanical property testing technology. The invention includes a test chamber body, which is divided into an auxiliary equipment installation area, a testing area, and a spare area from top to bottom. A test box is installed in the center of the testing area. From left to right, the bottom of the test box consists of a rolling ball receiving cavity, an acceleration force-bearing base plate, a sill plate lifting cavity, and a floorboard insertion cavity. A thrust motor and a thrust plate are installed on the chamber body to drive the rolling ball to perform irregular movements. A sill plate lifting cavity contains a sill plate simulation lifting column and a lifting motor to simulate sill impact. A lateral emergency braking test device is also installed on the chamber body to simulate lateral friction of shoe soles. This invention achieves multi-functional integration of rolling load testing, sill impact testing, and lateral braking testing, offering advantages such as comprehensive functionality, realistic simulation, and safety and reliability.

Description

Technical Field

[0001] This invention relates to the field of material mechanical property testing technology, specifically to a device for testing the mechanical properties of flooring materials under dynamic loads, and more particularly to a flooring dynamic loading test box that integrates impact load testing and rolling load testing functions. Background Technology

[0002] Currently, mechanical performance testing of flooring materials (such as sports wood flooring, ceramic flooring, composite flooring, etc.) usually relies on single-function testing equipment.

[0003] The existing technologies mainly have the following problems: First, existing testing equipment can only perform single-item tests and cannot complete impact tests and rolling load tests on the same equipment; Second, rolling tests mostly use rollers to perform simple reciprocating linear motion on a flat floor, which cannot simulate the complex stress state of actual use with angled turning and variable speed motion; Third, impact tests mostly use heavy objects to fall vertically and freely impact the floor surface, which cannot simulate the oblique impact and shear stress generated on the floor when a wheelchair's front wheel crosses a threshold or when an athlete stops and turns suddenly; Fourth, existing testing equipment lacks environmental simulation functions such as temperature and humidity, and cannot simulate the real use environment during the test; Fifth, existing equipment is mostly an exposed and bulk structure, which is inconvenient to transport and poses a safety hazard of test balls flying out and injuring people. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a solution.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a dynamic loading test chamber for floor impact and rolling load, including a test chamber body, wherein the test chamber body is configured from top to bottom as an auxiliary equipment installation area, a test area and a spare area; A test box is installed in the center of the test area. The bottom of the test box is arranged from left to right as follows: a rolling ball receiving cavity, an acceleration force base plate, a threshold strip lifting cavity, and a test floor insertion cavity. A thrust motor is installed on the left end of the acceleration and force-bearing base plate of the box body. The output end of the thrust motor is connected to a thrust plate that extends into the test box to the rolling ball receiving cavity. The rolling ball receiving cavity is connected to the ball material box at the top of the test box through an obliquely arranged channel tube. When the rolling ball falls into the rolling ball receiving cavity through the channel tube, it has an initial lateral movement speed, which makes the overall path of the rolling ball's impact and rebound after the thrust plate applies force to the rolling ball irregular. The threshold lifting cavity is equipped with a threshold simulation lifting column, which is connected to the lifting motor at its bottom. The lifting motor raises the threshold simulation lifting column to protrude from the bottom of the test box to simulate a real threshold, so that the rolling ball accelerates and bounces through the threshold before falling onto the test floor. The test floor is installed in the test floor insertion cavity, and a mesh support plate is provided at the bottom of the test floor insertion cavity. A heating wire heating device is provided at the bottom of the mesh support plate. A lateral emergency braking test device is connected to the test chamber of the housing above the insertion cavity of the floor to be tested via an electric lifting hoist. The lateral emergency braking test device includes a roller box with rollers at the bottom. Both ends of the roller box are connected to lateral brake pads via emergency braking motors. The top of the lateral emergency braking test device is connected to the electric lifting hoist via a strip sprocket frame. The roller box can be moved left and right by manually moving it or by driving the chain on the strip sprocket frame to move the roller box. At the same time, the emergency braking motor pushes the lateral brake pads to extend to simulate the lateral friction of the floor against the rubber sole of a shoe in a motion scenario.

[0006] Furthermore, the test box of the present invention is surrounded by a barrier, and the upper part is an open structure.

[0007] Furthermore, the channel tube of the present invention is rotatably connected to a baffle plate via a rotating shaft, and a handle connected to the rotating shaft is also provided on the outside of the channel tube.

[0008] Furthermore, the threshold simulation lifting column of the present invention has a segmented concave-convex structure on the column head that simulates a threshold, and grooves for mounting rubber sleeves are provided on the left and right sides of the column head. The rubber sleeves cover the entire column head during installation.

[0009] Furthermore, the top of the lateral emergency braking test device of the present invention is connected to the bar sprocket frame via a suspension rod. The top of the bar sprocket frame is connected to a drive box. The drive box has a reserved channel for the upper chain of the bar sprocket frame to pass through. The drive box is equipped with a drive gear and a drive motor for driving the upper chain. The top of the drive box is connected to the electric lifting crane.

[0010] Furthermore, the test box of the present invention is provided with an upwardly arched cover plate above the rightmost end of the insertion cavity of the floor to be tested, and a nozzle is provided on the cover plate. The nozzle is connected to a pump and a water tank located on the box body above it through a water pipe. The arched cover at the tail effectively prevents the rolling ball from hitting and jumping out under excessive force. The spray nozzle can simulate the damp state of the test floor at the tail, and the bottom heating can simulate the simultaneous heat and moisture state.

[0011] Furthermore, a protective net is installed below the nozzle of the present invention to protect the nozzle from impact.

[0012] Furthermore, the spare area described in this invention is provided with a slot box for placing spare test flooring.

[0013] Furthermore, the electric heating wire heating device of the present invention maintains a gap of 10-50mm with the mesh support plate for non-contact heating of the floor to be tested.

[0014] The beneficial effects of this invention are: First, the present invention integrates the rolling ball testing device, the sill simulation device, and the lateral emergency braking testing device into a single device, thus achieving both impact load testing and rolling load testing on a single device, making its functions more comprehensive.

[0015] Secondly, this invention uses a thrust motor to drive a thrust plate to apply force to the rolling ball. Combined with the initial lateral velocity of the rolling ball when it falls, the rolling ball moves along an irregular path. This overcomes the limitation of existing rolling tests that are limited to using rollers to cover linear motion, and can realistically simulate the complex wear and tear on the floor caused by caster steering and speed changes.

[0016] Third, this invention simulates a threshold by using a lifting column and its bottom lifting motor to simulate thresholds of different heights. It enables a test method where a rolling ball accelerates and bounces off the threshold before falling onto the test floor, thus simulating the instantaneous impact loading of a wheelchair crossing a threshold.

[0017] Fourth, by moving the roller box in the lateral emergency braking test device left and right, and cooperating with the emergency braking motor to push the lateral brake pads out, the present invention can simulate the lateral braking impact of the shoe sole rubber in the sports floor scenario, and realize the dynamic loading test of oblique shear stress.

[0018] Fifth, the present invention uses an electric heating wire heating device to heat the floor to be tested in a non-contact manner, which can pre-load the floor to be tested with temperature and simulate the floor's usage state under different temperature environments.

[0019] Sixth, the present invention, through the upward arched cover plate set at the rear of the test box, can effectively prevent the rolling ball from hitting and jumping out of the test box when it is subjected to excessive thrust, which not only protects the test equipment, but also prevents the rolling ball from flying out and injuring people, thus further improving the safety of the test process.

[0020] Seventh, the present invention sprays water mist onto the tail end of the test floor through the nozzle, which can simulate the localized dampness of the test floor; at the same time, the nozzle is used in conjunction with the heating device at the bottom to heat and humidify the test floor at the same time, simulating the complex environment of the floor being damp and heated at the same time in actual use, making the test data closer to the real application scenario. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a top-down view of the invention, illustrating the rolling ball falling obliquely and being pushed, as well as a schematic diagram of one of the motion paths during its subsequent irregular motion. Figure 3 This is a schematic diagram of the lateral emergency braking test device in this invention; Figure 4 This is a schematic diagram of the sill-mounted simulated rising column structure in this invention; Figure 5 This is a schematic diagram of the structure of the threshold simulation lifting column with rubber sleeve installed in this invention; The diagram labels are as follows: 1-Box body; 2-Test box; 21-Rolling ball receiving chamber; 211-Channel tube; 212-Ball material box; 213-Rolling ball; 214-Rotating shaft; 215-Baffle plate. 216-Handle; 22-Acceleration force-bearing base plate; 23-Sill strip lifting cavity; 231-Sill simulated lifting column; 232-Lifting motor; 233-Segmented concave-convex structure; 234-Rubber sleeve; 235-Card slot; 24-Insert cavity for the floor to be tested; 241-Floor to be tested; 242-Heating wire heating device; 25-Enclosure; 3-Electric lifting crane; 4-Lateral emergency braking test device; 41-Roller box; 42-Emergency brake motor; 43-Side brake pad; 44-Hanging rod; 5-Strip sprocket frame; 51-Drive box; 6-Cover plate; 7-Sprayer head; 71-Pump; 72-Water tank; 73-Protective net; 8-Slot box; 9-Thrust motor; 91-Thrust plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1-5The diagram shows a dynamic loading test chamber for floor impact and rolling loads, including a chamber body 1, which is configured from top to bottom as an auxiliary equipment installation area, a test area, and a spare area.

[0025] A test box 2 is installed in the center of the test area. The bottom of the test box 2, from left to right, consists of a rolling ball receiving cavity 21, an acceleration force-bearing base plate 22, a threshold strip lifting cavity 23, and a test floor insertion cavity 24. The test box 2 is surrounded by a barrier 25, and the upper part is open to facilitate observation of the test process.

[0026] A thrust motor 9 is installed on the left end of the acceleration-bearing base plate 22 on the housing 1. The output end of the thrust motor 9 is connected to a thrust plate 91 that extends into the test box 2 to the rolling ball receiving cavity 21. The rolling ball receiving cavity 21 is connected to the ball material box 212 at the top of the test box 2 via an obliquely arranged channel pipe 211. When the rolling ball 213 falls into the rolling ball receiving cavity 21 through the channel pipe 211, it has an initial lateral movement speed, which causes the rolling ball 213 to move along an irregular path after the thrust plate 91 applies force to it, thereby realizing a complex rolling load test simulating the steering and speed change of a caster wheel.

[0027] A baffle plate 215 is rotatably connected inside the channel tube 211 via a rotating shaft 214. A handle 216 connected to the rotating shaft 214 is also provided on the outside of the channel tube 211. The opening and closing of the baffle plate 215 can be controlled by rotating the handle 216, so as to release the rolling balls 213 one by one.

[0028] The threshold lifting cavity 23 contains a threshold simulation lifting column 231, which is connected to a lifting motor 232 at its bottom. The lifting motor 232 raises the threshold simulation lifting column 231 until it protrudes from the bottom of the test box 2 to simulate a real threshold, causing the rolling ball 213 to accelerate, bounce across the threshold, and fall onto the test floor 241. The head of the threshold simulation lifting column 231 has a segmented concave-convex structure 233 simulating a threshold, and slots 235 on the left and right sides of the head for securing rubber sleeves 234. The rubber sleeves 234 cover the entire head during installation. By replacing the rubber sleeves 234 with different materials and structures, they can be used to protect the head or simulate the impact characteristics of different types of thresholds.

[0029] The test floor 241 is installed inside the test floor insertion cavity 24. A mesh support plate is provided at the bottom of the test floor insertion cavity 24, and an electric heating wire heating device 242 is provided at the bottom of the mesh support plate. The electric heating wire heating device 242 maintains a gap of 10-50mm with the mesh support plate, and is used to perform non-contact heating of the test floor 241, which can simulate the floor usage conditions under different temperature environments.

[0030] A lateral emergency braking test device 4 is connected to the housing 1 above the insertion cavity 24 of the floor to be tested via an electric lifting hoist 3. The lateral emergency braking test device 4 includes a roller box 41 with rollers at the bottom. Both ends of the roller box 41 are connected to lateral brake pads 43 via emergency braking motors 42. The top of the lateral emergency braking test device 4 is connected to a strip sprocket frame 5 via a lifting rod 44. The left and right ends of the strip sprocket frame 5 are connected to chains via roller tension. The lifting rod 44 is suspended on the lower chain of the strip sprocket frame 5. The top of the strip sprocket frame 5 is connected to a drive box 51. The drive box 51 has a reserved channel for the upper chain of the strip sprocket frame 5 to pass through. The drive box 51 is equipped with a drive gear and a drive motor to drive the upper chain. The top of the drive box 51 is connected to the electric lifting hoist 3. The roller box 41 can be moved left and right by manually moving it or by driving the chain on the drive bar sprocket frame 5. At the same time, the emergency brake motor 42 pushes the extension of the lateral brake pad 43 to simulate the lateral friction of the floor against the rubber sole of the shoe in the motion scenario.

[0031] The test box 2 has an upwardly arched cover plate 6 located above the rightmost end of the insertion cavity 24 of the test floor. The cover plate 6 prevents the rolling ball 213 from impacting and jumping out of the test box 2 under excessive force. A nozzle 7 is installed on the cover plate 6, connected via a water pipe to a pump 71 and a water tank 72 located on the upper part of the housing 1. The nozzle 7 sprays water mist onto the tail section of the test floor 241 to simulate the damp state of the tail section. A protective net 73 is installed below the nozzle 7 to prevent debris from entering and clogging it.

[0032] In this embodiment, the heating element 242 and the nozzle 7 can be used together to simultaneously heat and humidify the test floor 241 to simulate the combined environment of the test floor 241 being heated and humidified at the same time.

[0033] The spare area is equipped with a slot box 8 for placing spare test floor 241, which facilitates the quick replacement of different models of test floor 241 during the test.

[0034] Working principle The working principle of this invention is as follows: During the rolling load test, the rolling ball 213 falls from the ball box 212 through the channel pipe 211 into the rolling ball receiving chamber 21, generating an initial lateral velocity upon falling. The thrust motor 9 drives the thrust plate 91 to apply force to the rolling ball 213, causing the rolling ball 213 to roll (the overall path of each bounce and impact is irregular), passing sequentially through the acceleration and stress base plate 22 and the threshold simulated lifting column 231, and finally landing on the test floor 241, simulating the complex motion state of the rolling load.

[0035] During the threshold impact test, the lifting motor 232 raises the threshold simulation lifting column 231 to a protruding state. After the rolling ball 213 accelerates, it hits the threshold simulation lifting column 231 and bounces, simulating the instantaneous impact loading of a wheelchair or other object crossing the threshold.

[0036] During the lateral braking test, the electric lifting crane 3 lowers the lateral emergency braking test device 4 to contact the test floor 241. While the roller box 41 moves left and right, the emergency braking motor 42 pushes the lateral brake pad 43 to extend, simulating the lateral friction of the shoe sole rubber.

[0037] When conducting environmental simulation tests, the heating wire heating device 242 heats the floor 241 under test in a non-contact manner, which can simulate a high-temperature environment on its own; the nozzle 7 sprays water mist onto the tail end of the floor 241 under test, which can simulate a localized humid environment on its own; when the heating wire heating device 242 and the nozzle 7 are used together, the floor 241 under test can be heated and humidified at the same time, simulating the combined use of the floor in a humid and high-temperature environment.

[0038] When conducting high-speed rolling tests, when the thrust motor 9 outputs a large thrust to make the rolling ball 213 move at high speed, the upward-arched cover plate 6 can effectively prevent the rolling ball 213 from jumping out of the test box 2 after impact, ensuring the safety of the test process.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dynamic loading test chamber for floor impact and rolling loads, characterized by: The test chamber includes a housing (1), which is divided into an auxiliary equipment installation area, a test area and a spare area from top to bottom. A test box (2) is installed in the center of the test area. The bottom of the test box (2) is arranged from left to right as a rolling ball receiving cavity (21), an acceleration force base plate (22), a threshold strip lifting cavity (23), and a test floor insertion cavity (24). A thrust motor (9) is provided on the left end of the acceleration force-bearing base plate (22) on the box (1). The output end of the thrust motor (9) is connected to a thrust plate (91) that extends into the test box (2) to the rolling ball receiving cavity (21). The rolling ball receiving cavity (21) is connected to the ball material box (212) on the top of the test box (2) through an obliquely arranged channel pipe (211). When the rolling ball (213) falls into the rolling ball receiving cavity (21) through the channel pipe (211), it has an initial lateral movement speed, which makes the overall path of the rolling ball (213) after the thrust plate (91) applies force to the rolling ball (213) to bounce and rebound irregular. The threshold lifting cavity (23) is provided with a threshold simulation lifting column (231), which is connected to the lifting motor (232) at its bottom. The threshold simulation lifting column (231) is raised to protrude from the bottom of the test box (2) by the lifting motor (232) to simulate the real threshold, so that the rolling ball (213) accelerates and bounces through the threshold before falling onto the test floor (241). The test floor (241) is installed in the test floor insertion cavity (24), and a mesh support plate is provided at the bottom of the test floor insertion cavity (24). A heating wire heating device (242) is provided at the bottom of the mesh support plate. The box (1) is connected to the lateral emergency braking test device (4) above the insertion cavity (24) of the floor to be tested via an electric lifting hoist (3). The lateral emergency braking test device (4) includes a roller box (41) with rollers at the bottom. Both ends of the roller box (41) are connected to lateral brake pads (43) via an emergency braking motor (42). The top of the lateral emergency braking test device (4) is connected to the electric lifting hoist (3) via a strip sprocket frame (5). The roller box (41) can be moved left and right by manually moving it or by driving the chain on the strip sprocket frame (5). At the same time, the lateral brake pads (43) are pushed out by the emergency braking motor (42) to simulate the lateral friction of the floor against the rubber sole of the shoe in the motion scene.

2. A dynamic loading test chamber for floor impact and rolling loads as claimed in claim 1, wherein: The test box (2) is surrounded by a barrier (25) and has an open structure at the top.

3. The dynamic loading test chamber for floor impact and rolling load as described in claim 1, characterized in that: Inside the channel tube (211), a baffle plate (215) is rotatably connected via a rotating shaft (214). Outside the channel tube (211), a handle (216) connected to the rotating shaft (214) is also provided.

4. The dynamic loading test chamber for floor impact and rolling load as described in claim 1, characterized in that: The threshold simulation lifting column (231) has a segmented concave-convex structure (233) on its column head that simulates a threshold. The left and right sides of the column head are provided with slots (235) for attaching a rubber sleeve (234). The rubber sleeve (234) covers the entire column head when installed.

5. A dynamic loading test chamber for floor impact and rolling loads as described in claim 1, characterized in that: The top of the lateral emergency braking test device (4) is connected to the bar sprocket frame (5) via a boom (44). The top of the bar sprocket frame (5) is connected to a drive box (51). The drive box (51) has a reserved channel for the upper chain of the bar sprocket frame (5) to pass through. The drive box (51) is equipped with a drive gear and a drive motor for driving the upper chain. The top of the drive box (51) is connected to the electric lifting crane (3).

6. A dynamic loading test chamber for floor impact and rolling loads as described in claim 1, characterized in that: The test box (2) is provided with an upwardly arched cover plate (6) above the rightmost end of the test floor insertion cavity (24). The cover plate (6) is provided with a nozzle (7), which is connected to the pump (71) and water tank (72) located on the box body (1) above it via a water pipe.

7. A dynamic loading test chamber for floor impact and rolling loads as described in claim 6, characterized in that: A protective net (73) is installed below the nozzle (7).

8. A dynamic loading test chamber for floor impact and rolling loads as described in claim 1, characterized in that: The spare area is equipped with a slot box (8) for placing a spare test floor (241).

9. A dynamic loading test chamber for floor impact and rolling loads as described in claim 1, characterized in that: The electric heating wire heating device (242) maintains a gap of 10-50mm with the mesh support plate and is used for non-contact heating of the floor (241) to be tested.

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