SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a tensile testing machine for foam board building materials.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a tensile testing machine for foam board building materials comprises a testing platform, wherein two clamps are arranged at the upper end of the testing platform, one clamp is fixed at the upper end of the testing platform, the other clamp is in sliding fit with the testing platform, one end of the clamp which is arranged in a sliding mode is fixedly connected with a pull rope, a winding wheel is arranged inside the testing platform, and the other end of the pull rope is wound on the winding wheel;
a first gear and a ratchet wheel are arranged on one side of the winding wheel, the first gear and the ratchet wheel are fixed on the same rotating shaft, a plurality of speed reducing mechanisms are arranged on one side of the winding wheel, a second gear and a fifth gear are arranged in the speed reducing mechanisms, the first gear is meshed with the second gear in the adjacent speed reducing mechanisms, the adjacent two speed reducing mechanisms are meshed with the fifth gear through the second gear, and the number of teeth of the second gear is less than that of the fifth gear;
the upper end of the test platform is provided with a retaining column, the lower end of the retaining column extends into the test platform, and the lower end of the retaining column is in a straight shape and abuts against the tooth surface of the ratchet wheel.
As a further description of the above technical solution:
the speed reducing mechanism comprises a shell, a first shaft and a second shaft are arranged in the shell in a rotating mode side by side, the second gear is fixed to the first shaft, and the fifth gear is fixed to the second shaft.
As a further description of the above technical solution:
the first shaft is fixedly connected with a third gear, the second shaft is fixedly connected with a fourth gear, and the third gear is meshed with the fourth gear.
As a further description of the above technical solution:
the fixture comprises a base, a pressing plate is arranged at the upper end of the base, and a fixing bolt penetrates through the pressing plate and is in threaded connection with the base.
As a further description of the above technical solution:
be provided with the dynamometer on the stay cord, the dynamometer is located test platform's top.
As a further description of the above technical solution:
the testing platform is provided with a plurality of pulleys, and the pull rope is wound on the pulleys.
As a further description of the above technical solution:
one side of the upper end of the test platform is provided with a spring, one end of the spring is fixedly connected to the test platform, and the other end of the spring is opposite to the clamp in a sliding mode.
As a further description of the above technical solution:
and a clamping groove is formed at one end of the second shaft and is a regular hexagon notch.
The utility model discloses following beneficial effect has:
1. the utility model discloses, adopt a plurality of reduction gears, and every reduction gear can all act on the input of power, so can be so that testing arrangement miniaturization conveniently carries.
2. The utility model discloses, be provided with ratchet and bumping post, it is simple structurally to realized the unidirectional rotation control of rolling wheel, avoided in the testing process, the test interruption problem takes place.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-4, the present invention provides an embodiment: the utility model provides a tensile testing machine for cystosepiment building materials, including test platform 1, test platform 1's upper end is provided with two anchor clamps 2, when testing, carry out the centre gripping with anchor clamps 2 for the sample, one of them anchor clamps 2 is fixed in test platform 1's upper end, another anchor clamps 2 and test platform 1 sliding fit, 2 one end fixedly connected with stay cords of anchor clamps 5 that slide to set up, test platform 1's inside is provided with wind-up pulley 8, the other end rolling of stay cord 5 is on wind-up pulley 8, rotate wind-up pulley 8, realize the rolling of stay cord 5, test the sample.
One side of the winding wheel 8 is provided with a first gear 9 and a ratchet 10, the winding wheel 8, the first gear 9 and the ratchet 10 are fixed on the same rotating shaft, namely, the winding wheel 8, the first gear 9 and the ratchet 10 synchronously rotate, one side of the winding wheel 8 is provided with a plurality of speed reducing mechanisms 4 for increasing input torque, a second gear 14 and a fifth gear 19 are arranged inside the speed reducing mechanisms 4, the first gear 9 is meshed with a second gear 14 in the adjacent speed reducing mechanisms 4, the adjacent two speed reducing mechanisms 4 are meshed through the second gear 14 and the fifth gear 19, the number of teeth of the second gear 14 is less than that of the fifth gear 19, and the effect of speed reducing output is realized.
The upper end of the testing platform 1 is provided with a stop pillar 3, the lower end of the stop pillar 3 extends into the testing platform 1, the lower end of the stop pillar 3 is in a straight shape and abuts against the tooth surface of the ratchet 10, the lower end of the stop pillar 3 abuts against the ratchet 10 and is used for controlling the rotation of the winding wheel 8 in a one-way mode, and the stop pillar 3 is lifted up to cancel the limitation on the ratchet 10.
The speed reducing mechanism 4 comprises a shell 13, a first shaft 16 and a second shaft 18 are arranged in parallel in the shell 13 in a rotating mode, a second gear 14 is fixed on the first shaft 16, a fifth gear 19 is fixed on the second shaft 18, a third gear 15 is fixedly connected on the first shaft 16, a fourth gear 17 is fixedly connected on the second shaft 18, the third gear 15 is meshed with the fourth gear 17, power of the second shaft 18 is transmitted to the first shaft 16 through the third gear 15 and the fourth gear 17, the second shaft 18 is an input shaft of the power, and the first shaft 16 is a power output shaft.
The clamp 2 comprises a base 20, a pressing plate 21 is arranged at the upper end of the base 20, a fixing bolt 22 is arranged at the upper end of the pressing plate 21, the fixing bolt 22 penetrates through the pressing plate 21 and is in threaded connection with the base 20, the fixing bolt 22 is dismounted, the pressing plate 21 is taken down, a sample is placed on the base 20, then the pressing plate 21 is mounted again, the sample is fixed, and according to the clamping requirement and the tested sample, an adhesive can be used between the sample and the clamp 2 for further fixing, so that the measuring accuracy is improved.
Be provided with dynamometer 6 on stay cord 5 for show the pulling force value, can will adopt electronic type according to the demand, perhaps equipment replacement dynamometer 6 such as pressure sensor, read the number by the computer and preserve, dynamometer 6 is located test platform 1's top, is provided with a plurality of pulleys 12 on test platform 1, and stay cord 5 is around on pulley 12, and pulley 12 is used for changing the direction of stay cord 5, through setting up pulley 12, realizes the final rolling of stay cord on wind-up wheel 8.
One side of the upper end of the testing platform 1 is provided with a spring 7, one end of the spring 7 is fixedly connected to the testing platform 1, the other end of the spring 7 is opposite to the sliding clamp 2, and when a sample is stretched off, the spring 7 is used for buffering the impact of the clamp 2.
One end of the second shaft 18 is provided with a clamping groove 11, the clamping groove 11 is a regular hexagon notch, a related tool is used, the clamping groove 11 is inserted and rotated, the second shaft 18 rotates, namely, power is input into the speed reducing mechanisms 4, the speed reducing mechanisms 4 are mutually meshed, namely, the power is input into the speed reducing mechanisms 4 which are different, the torque finally transmitted to the winding wheel 8 is different, and the fact that enough torque is available for testing samples is guaranteed.
The working principle is as follows: during the use, on being fixed in anchor clamps 2 with the sample, use the instrument to insert in draw-in groove 11 after that to the second shaft 18 of rotation, realize the tensile test to the sample, if can't further rotate second shaft 18, can insert the instrument and keep away from among the reduction gears 4 of rolling wheel 8, when extracting the instrument simultaneously, owing to be provided with ratchet 10 and bumping post 3, can prevent that rolling wheel 8 from rotating, avoid the test to break.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.