CN217277415U - Chin strap toughness testing arrangement under safety helmet - Google Patents

Abstract

The utility model relates to a chin strap toughness testing arrangement under safety helmet, including the pedestal frame, the operation base platform, the support frame, the head mould, disc on the side direction rigidity, chin strap intensity anchor clamps down, disc under the side direction rigidity, sensor and lift lead screw, there is the operation base platform at the top of pedestal frame through bolt fixed mounting, operation base platform top one end center department welded fastening has the support frame, support frame top center department welded fastening has the fixed column, there is the head mould at the top of fixed column through bolt fixed mounting, there is the lift lead screw at one side center department that lies in the support frame on the operation base platform top through bolt fixed mounting. Has the advantages that: adopt 45HRC material stainless steel metal appearance to press from both sides, the measuring cell is the special pressure sensor that draws of high accuracy, but real-time display measuring force value, the biggest force value of automatic latch-up is used with the artificial chin combination of simulation, realizes lower chin strap intensity and the side direction rigidity performance of test safety helmet and helmet, simple structure, convenient to use, practical value is high.

Description

Chin strap toughness testing arrangement under safety helmet

Technical Field

The utility model relates to a safety helmet correlation technique field particularly, relates to chin strap toughness testing arrangement under the safety helmet.

Background

After a finished safety helmet is produced by a safety helmet manufacturer, various parameters of the safety helmet are detected according to the requirements of GB/T2812-2006 safety helmet testing method, wherein two parameters of chin strap strength testing and lateral rigidity testing are provided, a plurality of instruments factory domestic 2 instruments on the market detect the two parameters, a small number of instruments capable of detecting the two parameters simultaneously generally have the phenomena of unscientific operation, unstable stress application and the like, are influenced by the personal operation level of operators, have poor test repeatability, are easy to fatigue the testers in the operation process, influence the work efficiency, and provide the safety helmet chin strap toughness testing device.

Disclosure of Invention

An object of the utility model is to provide a chin strap toughness testing arrangement under safety helmet to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the testing device for the toughness of the chin strap of the safety helmet comprises a base frame, an operating base table, a supporting frame, a head die, a lateral rigid upper disc, a chin strap strength lower clamp, a lateral rigid lower disc, a sensor and a lifting screw rod, the top of the base frame is fixedly provided with the operating base table through bolts, the supporting frame is fixedly welded at the center of one end of the top of the operating base table, a fixed column is welded and fixed at the center of the top of the supporting frame, the top of the fixed column is fixedly provided with the head die through a bolt, a lifting screw rod is fixedly arranged at the center of one side of the support frame on the top of the operation base table through a bolt, the top of the lifting screw rod is fixedly provided with the lateral rigid lower disc, the top of the lateral rigid lower disc is provided with the chin strap strength lower clamp, and the top of the chin strap strength lower clamp is fixedly provided with the lateral rigid upper disc.

Furthermore, the head die is of an arc-shaped structure, and the size of the head die is matched with the size of the interior of the safety helmet.

Furthermore, fixed shafts are fixedly welded at two ends of the top of the lateral rigid upper disc.

Further, one side of the sensor is fixedly provided with a wire through a bolt, and the other end of the wire is connected to one side of the operation base table.

Furthermore, there is a power wire in one side of the inside of the operation base table through a bolt, and a plug is fixedly installed at the other end of the power wire.

Further, bottom one side of operation base platform is equipped with a plurality of display screen, just the display screen is including power value, displacement, time and speed governing, bottom one side of operation base platform is equipped with a plurality of button.

Compared with the prior art, the utility model discloses following beneficial effect has: adopt 45HRC material stainless steel metal appearance to press from both sides, electronic stress application control system, and convenient operation, data are accurate, and the measuring element is the special pull pressure sensor of high accuracy, but real-time display measuring force value, the biggest power value of automatic latch, can show the displacement value that appearance pressed from both sides and remove in real time, and displacement zero point location is convenient, accords with the head mould of standard, has stable support, uses with artificial chin combination of simulation, realizes lower chin strap intensity and the side direction rigidity performance of test safety helmet and helmet, and simple structure, convenient to use, practical value is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a safety helmet chin strap toughness testing device implemented according to the present invention;

reference numerals are as follows:

1. a base frame; 2. operating a base table; 21. a power supply lead; 22. a plug; 23. a display screen; 24. pressing a key; 3. a support frame; 31. fixing a column; 4. a head die; 5. a laterally rigid upper disk; 6. a chin strap strength lower clamp; 7. a lateral rigid lower disc; 8. a sensor; 81. a wire; 9. and a lifting screw rod.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art without creative work belong to the scope of protection of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, 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; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; 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, the device for testing the flexibility of the chin strap of a safety helmet according to the present invention comprises a base frame 1, an operation base table 2, a support frame 3, a head mold 4, a lateral rigid upper disk 5, a chin strap strength lower clamp 6, a lateral rigid lower disk 7, a sensor 8 and a lifting screw 9, wherein the top of the base frame 1 is fixedly installed with the operation base table 2 through a bolt, the support frame 3 is fixedly welded at the center of one end of the top of the operation base table 2, a fixed column 31 is fixedly welded at the center of the top of the support frame 3, the head mold 4 is fixedly installed at the top of the fixed column 31 through a bolt, the lifting screw 9 is fixedly installed at the center of one side of the support frame 3 on the top of the operation base table 2, the lateral rigid lower disk 7 is fixedly installed at the top of the lifting screw 9, the chin strap strength lower clamp 6 is installed at the top of the lateral rigid lower disk 7, and a lateral rigid upper disc 5 is fixedly arranged at the top of the lower chin strap strength clamp 6.

Wherein, head die 4 is the arc structure, and the size of head die 4 is identical with the inside size of safety helmet, realizes supporting fixedly.

Wherein, the fixed shaft 51 is welded and fixed at the two ends of the top of the lateral rigid upper disc 5, so that the head die 4 is attached to the helmet.

Wherein, there is wire 81 one side of sensor 8 through bolt fixed mounting, and the other end of wire 81 is connected to one side of operation base platform 2, realizes the transmission of data.

Wherein, a power wire 21 is fixedly arranged at one side inside the operation base table 2 through a bolt, and a plug 22 is fixedly arranged at the other end of the power wire 21 to switch on the power supply.

Wherein, bottom one side of operation base platform 2 is equipped with a plurality of display screen 23, and display screen 23 is equipped with a plurality of button 24, convenient operation simple including power value, displacement, time and speed governing, bottom one side of operation base platform 2.

Principle of operation

Through the above technical scheme of the utility model, chin strap toughness test device is including chin strap intensity test under the safety helmet in the use:

1. installing a chin strap test clamp;

2. checking that a power switch of the speed regulator is turned on, setting a test timing device for 30min, turning on a power switch of the instrument, and shifting a rocker switch to a chin strap strength gear;

3. the artificial chin support is slid to a proper position by utilizing a rising and falling crank switch, a safety helmet which is tested by puncture is normally worn on the head model, the chin strap passes through two shafts of the artificial chin, and the chin strap is completely contacted with the two fixed shafts of the artificial chin to be in a tight state by adjusting the length of the chin strap of the safety helmet;

4. rotating a speed regulator knob to a position of 20, pressing a 'timing start' button, starting timing test time, observing a corresponding relation between a force value and time, finely adjusting the speed regulator knob, enabling an artificial chin to move downwards at a speed of 150N/mint 10N/min until the loading is 150N, and then continuously applying the load at a speed of 20N/mint 2N/min until a chin strap is disconnected or relaxed (when the separation displacement of an upper bracket and a lower bracket exceeds the wearing height of the safety helmet, the safety helmet is considered to be relaxed);

5. and pressing a 'timing stop' button to clear the timer, and finishing the test.

Lateral rigidity test:

1. detaching the lower chin strap strength clamp;

2. checking that a power switch of the speed regulator is turned on, setting a test timing device for 30min, turning on a power switch of the instrument, and shifting a rocker switch to a lateral rigid gear;

3. lowering the lower flat plate to a proper position according to the height of the side surface of the hat, and placing the side of the safety helmet prepared in advance between the two flat plates;

4. rotating a speed regulator knob to a position of 20, pressing a 'timing start' button, starting the test time, applying a force of 30N in the vertical direction of a flat plate, keeping the force for 30S, and resetting a key on a long-press displacement instrument;

5. observing the corresponding relation between the force value and the time, finely adjusting a knob of the speed regulator, loading the force regulator to 430N at the speed of 100N/min, and keeping the force regulator for 30S, wherein the value on the displacement instrument is the maximum deformation value of the helmet;

6. and (3) reducing the load to 25N at the speed of 100N/min, immediately increasing the load to 30N at the speed of 100N/min, keeping the load for 30s, recording the possible damage phenomenon, pressing a timing stop button, resetting the timer, and completing the test.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. The safety helmet chin strap toughness testing device comprises a base frame (1), an operating base table (2), a support frame (3), a head die (4), a lateral rigidity upper disc (5), a chin strap strength lower clamp (6), a lateral rigidity lower disc (7), a sensor (8) and a lifting screw rod (9), and is characterized in that the operating base table (2) is fixedly installed at the top of the base frame (1) through bolts, the support frame (3) is fixedly welded at the center of one end of the top of the operating base table (2), a fixing column (31) is fixedly welded at the center of the top of the support frame (3), the head die (4) is fixedly installed at the top of the fixing column (31) through bolts, and the lifting screw rod (9) is fixedly installed at the center of one side of the support frame (3) on the top of the operating base table (2) through bolts, the top of the lifting screw rod (9) is fixedly provided with the lateral rigid lower disc (7), the top of the lateral rigid lower disc (7) is provided with the chin strap strength lower clamp (6), and the top of the chin strap strength lower clamp (6) is fixedly provided with the lateral rigid upper disc (5).

2. The safety helmet chin strap toughness testing arrangement of claim 1, characterized in that, the head mould (4) is the arc structure, and the size of the head mould (4) is identical with the inside size of safety helmet.

3. The helmet chin strap toughness testing device of claim 1, wherein the top two ends of the lateral rigid upper disk (5) are welded and fixed with fixed shafts (51).

4. The headgear chin strap toughness testing device according to claim 1, wherein a lead (81) is fixedly mounted to one side of the sensor (8) through a bolt, and the other end of the lead (81) is connected to one side of the operating base table (2).

5. The headgear chin strap toughness testing apparatus according to claim 1, wherein a power supply lead (21) is fixedly mounted on one side inside the operating base table (2) through a bolt, and a plug (22) is fixedly mounted on the other end of the power supply lead (21).

6. The headgear chin strap toughness testing apparatus of claim 1, wherein a plurality of display screens (23) are provided at one side of the bottom of the operation base table (2), and the display screens (23) include force values, displacement, time and speed regulation, and a plurality of keys (24) are provided at one side of the bottom of the operation base table (2).

Images