CN205271927U - Electric pickaxe - Google Patents

Abstract

The utility model provides an electric pickaxe, includes quick -witted case, the cylinder, and the eccentric wheel, the connecting rod, first piston, the second piston, the piston rod communicates the air flue of quick -witted case and cylinder, first check valve, second check valve, eccentric wheel pass through the connecting rod with first piston and are connected. The utility model discloses under the prerequisite that does not influence normal practicality, when piston reciprocating motion, through each chamber variation in pressure in the cylinder, electric pickaxe's radiating effect has been improved greatly to automatic the completion and external admitting air, exhaust.

Description

Electric pick

Technical field

The utility model relates to a kind of hand electric instrument, in particular to a kind of electric pick.

Background technology

Electric pick often needs to carry out long-time non-stop run, and its internal temperature can continue to rise, and not only self hot impact operation, also can accelerate the senile abrasion of bearing, gear, sealing member, and then increases maintenance nurse fees use. Heat in electric pick is not only produced by friction between mechanical part, and the supercharging of cylinder air and friction can produce a large amount of heats equally, and existing electric pick, its cylinder interior mostly is semi-closed structure, and inner air does not contact with outside substantially, it is difficult to heat radiation.

Summary of the invention

For the deficiencies in the prior art, the utility model provides a kind of electric pick that electric pick cylinder air is operationally circulated with outside.

The technical solution adopted in the utility model is: a kind of electric pick, comprise cabinet, cylinder, eccentric wheel is installed in described cabinet, installing first piston and the 2nd piston in described cylinder, described first piston is connected with eccentric wheel, and described cabinet is connected by air flue with described cylinder, it is characterized in that: described cabinet wall is provided with the first check valve, described first piston is provided with the 2nd check valve.

The utility model, under the prerequisite not affecting normal use, when piston reciprocating moves, by the change of cavity pressure each in cylinder, automatically completes the air inlet with the external world, exhaust, substantially increases the radiating effect of electric pick.

Accompanying drawing explanation

Fig. 1 is that the utility model outwards promotes status architecture schematic diagram;

Fig. 2 is the inside driving status structural representation of the utility model;

In figure: 1-cabinet, 2-cylinder, 3-connecting rod, 4-first piston, 5-the 2nd piston, 6-piston rod, 7-pore, 8-air flue, 9-eccentric wheel chamber, 10-pressure chamber, 11-first check valve, 12-the 2nd check valve, 13-eccentric wheel.

Embodiment

Such as Fig. 1,2, arranging eccentric wheel 13 in cabinet 1, install cylinder 2 before cabinet 1, cylinder 2 cylinder body is bilayer structure, is air flue 8 between two layers, and air flue 8 one end connects cabinet 1, and cylinder 2 internal layer arranges pore 7 near cylinder mouth position. First piston 4 and the 2nd piston 5 are set in cylinder 2, it is connected by connecting rod 3 between eccentric wheel 13 with first piston 4, connecting rod 3 two ends are hinged with eccentric wheel 13 and first piston 4 respectively, 2nd piston outer setting piston rod 6, it is eccentric wheel chamber 9 in first piston 4 to cabinet 1, it is pressure chamber 10 between first piston 4 and the 2nd piston 5. Arranging the first check valve 11 on the wall of cabinet 1 and be connected outside, eccentric wheel chamber 9, the first check valve 11 is eccentric wheel chamber 9 externally one-way gas exhaust; Arranging the 2nd check valve 12 on first piston, to be connected eccentric wheel chamber 9 with pressure chamber the 10, two check valve 12 be that eccentric wheel chamber 9 is to pressure chamber 10 one-way air inlet structure.

In use, eccentric wheel 13 drives first piston 4 to do push-pull reciprocating motion by connecting rod 3 to electric pick. Such as Fig. 1, when first piston 4 is extrapolated, eccentric wheel chamber 9 produces negative pressure, and outside air enters eccentric wheel chamber 9 by pore 7 and air flue 8, pressure chamber 10 pressure increase, promotes the 2nd piston 5 forward impact, is hit by piston rod 6 and makes pick. Such as Fig. 2, when the 2nd piston 5 moves forward to limit position, pressure chamber 10 mesohigh gas by pore 7 and air flue 8 pressure release to eccentric wheel chamber 9, meanwhile, draw after first piston 4 so that eccentric wheel chamber 9 pressure raises, first check valve 11 and the 2nd check valve 12 are opened, it is external that part gas discharges cylinder, and another part gas enters pressure chamber 10, prepares to impact next time. When above-mentioned action constantly repeats, the gas in cylinder is constantly sucked by pore 7, is discharged by the first check valve 11, considerably increases the air circulation in cylinder, thus reaches good radiating effect. First check valve 11 in use also can be unloaded by the utility model, eccentric wheel chamber is directly in communication with the outside, thus reaches better radiating effect.

Claims (1)

1. an electric pick, comprise cabinet (1), cylinder (2), eccentric wheel (13) is installed in described cabinet, installing first piston (4) and the 2nd piston (5) in described cylinder, described first piston is connected with eccentric wheel (13), and described cabinet is connected by air flue with described cylinder, it is characterized in that: described cabinet wall is provided with the first check valve (11), described first piston is provided with the 2nd check valve (12).