Elastic running board for running machine

A technology of running boards and treadmills, applied in the field of treadmills, can solve problems such as sports injuries, unfavorable bones and joints, and annoying

Inactive Publication Date: 2011-12-14
吴小凤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The elastic modulus of MDF is relatively high, generally in the range of 2000-3000Mpa. The impact force generated by people when running is different for running belts (generally thinner, mostly 1.6-2.0mm thick) and running boards. There is almost no cushioning and absorption effect, and it will produce a reaction force on the human body, which is not good for the bones of the feet, especially the joints, and may cause sports injuries
The most direct feeling for treadmill users is that it is hard and not comfortable enough
[0006] (2) After the impact force of running acts on the running board, it will produce a loud "bang, bang" sound, and the friction between the running belt and the running board will also produce a "pow, bang" sound. Whether the user or other people nearby (such as neighbors) are very annoying

Method used

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  • Elastic running board for running machine
  • Elastic running board for running machine

Examples

Experimental program
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Effect test

Embodiment 1

[0019] see figure 1 As shown, an elastic running board for a treadmill is successively bonded by a base plate 1, an elastic layer 2 and a friction layer 3. The material of the elastic layer 2 adopts foam, such as PU foam or EVA foam, and the friction The material of layer 3 is glass fiber reinforced flexible unsaturated polyester resin S-465 or S-628, or epoxy resin toughened and modified by hydroxyl-terminated liquid nitrile rubber CTBN or thermoplastic polyurethane rubber TPU.

[0020] Taking the elastic running board for 18mm home electric treadmill as an example, the explanation is as follows:

[0021] ①. Bottom plate 1 is MDF with a thickness of 12mm, a static bending strength of 50Mpa, an elastic modulus of 2800 Mpa, and a moisture content of 4%.

[0022] ②. The elastic layer 2 is made of EVA foam: the density is 200kg / m3, the hardness is 40°Shore B, and the thickness is 5.8mm.

[0023] ③. Friction layer 3: use glass fiber canvas 220g / ㎡ flexible unsaturated polyest...

Embodiment 2

[0025] Taking the elastic running board for 25mm commercial electric treadmill as an example, the explanation is as follows:

[0026] ①. The bottom plate is made of MDF with a thickness of 18mm, a static bending strength of 45Mpa, an elastic modulus of 2650Mpa, and a moisture content of 4%.

[0027] ②. The elastic layer 2 is made of PU foam: the density is 480kg / m3, the tensile strength is 6.20Mpa, the elongation at break is 330%, the compression deformation of 10% is 1033KPa, the tear strength is 850KN / M, and the thickness is 6.5mm .

[0028] ③. Friction layer 3: use glass fiber canvas 450g / ㎡, epoxy resin E-44 100, (parts by weight, the same below), polyurethane TPU 20, gas phase SiO2120, polyamide 60 (curing agent): the thickness is controlled at 0.5mm .

[0029] The temperature rise of the prepared running board is less than 40°C and the noise is less than 65dB when the running board is continuously operated under a load of 70kg.

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Abstract

The invention discloses an elastic running board for a running machine. The elastic running board is formed by adhering an elastic layer on a bottom plate surface which is manufactured by a medium density fiberboard or a plywood board and then adhering a friction layer on the outer surface of the elastic layer. The elastic running board can buffer and absorb impact force and vibration force which are generated by running, has high intensity, toughness and heat resistance, and greatly reduces noise emitted during running.

Description

technical field [0001] The invention relates to the technical field of treadmills, in particular to an elastic running board for a treadmill. Background technique [0002] When using a treadmill for running or walking exercises, people step on the running belt of the treadmill to walk forward (run), and the running belt runs backward. The weight of the human body and the impact force produced by running are borne by the running plate at the bottom of the running belt. [0003] The base material of the running board is currently medium-density fiberboard (MDF), and a layer of melamine-formaldehyde resin-impregnated paper is pasted on the surface of the MDF. After the melamine formaldehyde resin is cured, it is flat, smooth, hard, wear-resistant, and has a low coefficient of friction (relative to the cloth base at the bottom of the running belt, and its friction coefficient is about 0.20), so it is widely used. [0004] Serious and in-depth analysis and research on the use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06A63B22/02
Inventor 吴小凤
Owner 吴小凤
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