Buffer type safety hammer
Technical Field
The invention relates to the field of hardware tools, in particular to a safety hammer.
Background
At present at the in-process of nailing, generally adopt the hammer to strike, and strike the in-process, generally need hold the nail with the hand, if strike inaccurate, then probably strike the finger, make the finger receive great injury.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a buffer type safety hammer, which has a rigid hammering action only when a nail cap is hammered during a process of hammering a nail, and can greatly buffer hammering force when a hand is hammered, so as to significantly reduce damage to the hand.
The technical scheme adopted by the invention for solving the technical problems is as follows: the buffer type safety hammer comprises a hammer head and a grab handle orthogonally fixed with the hammer head; the hammer head comprises a metal column block; an axial slideway is arranged in the metal column block along the axis; an axial sliding column is arranged in the axial sliding way, and the axial sliding way is in airtight fit with the axial sliding column; the lower end of the axial sliding column extends to the lower part of the metal column block and is fixedly connected with the hard round block; a supporting pressure spring is connected between the metal column block and the hard round block; the lower bottom surface of the hard round block is equidistantly distributed with metal stripes which are parallel to each other; the upper end of the axial slideway is provided with an electromagnetic valve; a battery is arranged in the metal column block; the battery and the electromagnetic valve form an electrical series circuit, and each adjacent metal stripe is electrically connected to different electrical ends of the electrical series circuit, so that after any adjacent metal stripe is electrically lapped, the battery and the electromagnetic valve form a series circuit, and at the moment, the electromagnetic valve is closed; otherwise, when the series circuit is disconnected, the electromagnetic valve is opened.
Preferably, the width of the metal stripes is 0.25mm-0.5mm, and the width between adjacent metal stripes is 0.25mm-0.5 mm; so that the nail head of the common nail is at least overlapped to a pair of adjacent metal stripes when contacting the lower bottom surface of the hard round block.
Preferably, a fit clearance is reserved between the axial sliding column and the axial slideway, and the upper end of the axial sliding column is provided with a sliding plug; the axial sliding column is in airtight fit with the axial slideway through the sliding plug.
Preferably, the axial strut is formed from an aluminum tube; the hard round block comprises a metal round block and an insulating hard block paved on the bottom surface of the metal round block, and the metal stripes are embedded in the insulating hard block so that the bottom surface of the whole hard round block forms a flat surface.
Preferably, a sliding plug cylinder is further arranged above the metal column block; the lower end of the sliding plug cylinder is connected with the axial slideway through the electromagnetic valve, the upper end of the sliding plug cylinder is communicated with the outside, and a sliding plug is arranged in the sliding plug cylinder; hydraulic oil is filled between the sliding plug and the axial sliding column, and the hydraulic oil can migrate between the sliding plug cylinder and the axial slideway through the electromagnetic valve.
The invention has the beneficial effects that: when the buffer type safety hammer works, if the nail cap is hammered downwards, a pair of adjacent metal stripes are overlapped at the moment that the nail cap contacts the lower surface of the hard round block, so that the electromagnetic valve is closed, fluid in the axial slide way and between the axial sliding column and the electromagnetic valve cannot be discharged outwards, the buffer is difficult to buffer the axial displacement of the axial sliding column, the whole hammer head keeps stronger rigidity, and the nail cap is hammered rigidly; when the hard round block strikes the hand, the electromagnetic valve is not electrified and keeps an open state, so that air in the axial slideway can be discharged outwards, the hard round block can be quickly withdrawn backwards along with the axial sliding column, the hammering impulse is buffered by the supporting pressure spring, the damage to the hand is reduced to a greater extent, and the safety is good.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the buffer type safety hammer.
Fig. 2 is a schematic structural diagram of a second embodiment of the buffer type safety hammer.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
the first embodiment is as follows:
in the first embodiment shown in fig. 1, the buffer type safety hammer comprises a hammer head 1 and a handle 2 orthogonally fixed to the hammer head; the hammer head 1 comprises a metal column block 11; an axial slideway 110 is arranged in the metal column block 11 along the axis; an axial sliding column 111 is arranged in the axial sliding way 110, the axial sliding way 110 is in airtight fit with the axial sliding column 111, specifically, a fit gap is reserved between the axial sliding column 111 and the axial sliding way 110, and a sliding plug 112 is arranged at the upper end of the axial sliding column 111; the axial spool is in air tight engagement with the axial slide 110 via the spool 112.
The lower end of the axial sliding column 111 extends to the lower part of the metal column block 11 and is fixedly connected with the hard round block 12; a supporting pressure spring 13 is also connected between the metal column block 11 and the hard round block 12; the lower bottom surface of the hard round block 12 is equidistantly distributed with metal stripes 121 which are parallel to each other; the upper end of the axial slideway 110 is provided with an electromagnetic valve 14; a battery 15 is arranged in the metal column block 11; the battery 15 and the electromagnetic valve 14 form an electrical series circuit, and each adjacent metal stripe 121 is electrically connected to different electrical ends of the electrical series circuit, so that after any adjacent metal stripe is electrically overlapped, the battery 15 and the electromagnetic valve 14 form a series loop, and at this time, the electromagnetic valve 14 is closed; otherwise, when the series circuit is disconnected, the solenoid valve 14 is opened.
In the buffer type safety hammer, the width of the metal stripes 121 is 0.25mm to 0.5mm, and the width between adjacent metal stripes is 0.25mm to 0.5 mm; so that the head of the common nail is at least overlapped to a pair of adjacent metal stripes when contacting the lower bottom surface of the hard round block 12.
In the buffer type safety hammer, the axial sliding column 111 is made of an aluminum pipe, so that the axial sliding column has a small weight; the hard round block 12 comprises a metal round block and an insulating hard block laid on the bottom surface of the metal round block, and the metal stripe 121 is embedded in the insulating hard block so that the bottom surface of the whole hard round block 12 forms a flat surface.
When the buffer type safety hammer works, if the nail head is hammered downwards, a pair of adjacent metal stripes 121 are overlapped at the moment that the nail head contacts the lower surface of the hard round block 12, so that the electromagnetic valve 14 is closed, air in the axial slide way 110 and between the axial slide column 111 and the electromagnetic valve 14 cannot be discharged outwards, and the buffer type safety hammer is difficult to buffer axial displacement of the axial slide column 111, so that the whole hammer head 1 keeps strong rigidity, and the nail head is hammered rigidly. It is worth pointing out that although the air between the solenoid valve 14 and the axial sliding column 111 can be compressed to a certain degree, the force required for compressing the air is huge, and the influence on the overall rigidity of the hammer head is small; particularly when, in a natural state, the air section between the solenoid valve 14 and the sliding plug 112 of the axial sliding column 111 is small, such as 4 mm; the air pressure will increase to 2 standard atmospheres as soon as the air section is compressed axially a little distance, e.g. 2mm, which is basically difficult to achieve during manual hammering, i.e. the axial strut 111 cannot be retracted a distance of more than 2mm during manual hammering, i.e. the hammer head 1 has good rigidity.
When the hard round block 12 of the safety hammer strikes a hand, the electromagnetic valve 14 is not electrified and keeps an open state, so that air in the axial slideway 110 can be discharged outwards, the hard round block 12 is quickly withdrawn backwards along with the axial sliding column 111, the hammering impulse is buffered by the supporting pressure spring 13, the damage to the hand is reduced to a greater extent, and the safety hammer has good safety.
Example two:
for the second embodiment shown in fig. 2, it is different from the first embodiment in that a sliding plug cylinder 16 is further provided above the metal column block 11; the lower end of the sliding plug cylinder 16 is connected with the axial slideway 110 through the electromagnetic valve 14, the upper end of the sliding plug cylinder 16 is communicated with the outside, and a sliding plug 161 is arranged in the sliding plug cylinder 16; hydraulic oil is filled between the sliding plug 161 and the axial sliding column 111, and the hydraulic oil can migrate between the sliding plug cylinder 16 and the axial slideway 110 through the electromagnetic valve 14. For the second embodiment, the hydraulic oil is completely incompressible, so that when the electromagnetic valve 14 is closed, the entire hammer head 1 maintains absolute rigidity because the axial sliding column 111 cannot be displaced in the axial direction; when the electromagnetic valve 14 is opened, the axial sliding column 111 can push the hydraulic oil in the axial slideway 110 to flow through the electromagnetic valve 14 and push the sliding plug 161 to retreat, thereby forming an obvious buffering effect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is intended to cover all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.