CN2716544Y - Piston connecting rod structure of oil-free compressor - Google Patents

Abstract

The utility model discloses a piston connecting rod structure of oil-free compressor, mainly provided with a central fixing hole on the flat plane of the piston head of a piston connecting rod. A plurality through holes are arranged on the edge of the fixing hole. A wafer back valve is locked through a screw; the wafer back valve is completely sealed with the fixing hole of the piston head without any groove clearance; when the piston head is compressed, the wafer back valve forms a smooth closed state without any groove clearance; when the piston head is released, the wafer back valve forms an opening state to form a main air inlet of a cylinder and to improve the defect that the traditional piston head is easy to generate residue air pressure in the groove clearance, because the back valve of is arranged at the groove.

Description

The structure of oil free type air compressor piston rod

Technical field

The utility model relates to a kind of structure of oil free type air compressor piston rod, particularly a kind ofly opens and closes smooth and easy and can avoid producing residual pneumatics, influences the piston connecting rod structure of inlet, outlet.

Background technique

The structure of traditional oil free type air compressor, as Fig. 1, shown in Figure 2, be provided with a motor 11, make motor 11 by idle pulley 12 and bearing 13 transferring power to piston rod 14, make piston rod 14 in crankcase 15, do rotation motion, and then make its piston head 16 in cylinder 17, do reciprocatory motion, and dispose a check valve 18, release when piston head 16 and to return when action, ambient air is entered in the crankcase 15 by suction port 19, enters in the cylinder 17 through piston head 16 again, when piston head upwards compresses, gas in the cylinder 17 is compressed, and is discharged by relief opening 21 via check valve 18 earlier again, and enters in the gas receiver that is connected.

The piston head 16 of aforesaid piston rod 14 is provided with elongated groove 161,161 central authorities are provided with fixed hole 162 in groove, for a sealed check valve 22, fixed hole 162 both sides are respectively equipped with two perforation 163, wherein, this check valve 22 is elongated tinsels, it is locked in prevents behind the elongated groove 161 traversingly, and breaks away from closed perforation 163, produce the gas leakage of up compression stroke, when piston head 16 upwards compressed, check valve 22 closely was pressed on perforation 163, formed blocking, air in the cylinder 17 can not released by check valve 22, and release when returning when piston head 16,22 of check valves break away from perforation 163 and are opening state, pass for air.

Above-mentioned known piston connecting rod structure, because check valve 22 is placed in the groove of piston head 16 161, when piston head 16 upwards compressed, the clearance space of groove 161 produced residual pneumatics, influenced air inlet, the effect of giving vent to anger.

Summary of the invention

The purpose of this utility model provides a kind of structure of oil free type air compressor piston rod, makes air compressor air intake smooth and easy, prevents to influence because of pneumatics is residual the inlet, outlet effect.

Above-mentioned purpose of the present utility model is to realize like this, a kind of structure of oil free type air compressor piston rod is provided with the piston rod that an end is connected in motor in air compressor, makes the to-and-fro motion in cylinder of its piston head, the formation air pressure contracts and is stored in gas receiver, it is characterized in that:

The plane of this piston head is provided with a center fixation hole, periphery in fixed hole is provided with a plurality of open-works, the thin shape check valve of circle that is provided with through hole for a center passes the fixed hole that is locked on piston head behind the through hole with screw, when piston head in compression or release when returning, this check valve is close to open-work or is the unlatching shape.

The utility model is elaborated with instantiation below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is traditional air compressor structural drawing;

Fig. 2 is traditional piston rod three-dimensional exploded view;

Fig. 3 is the utility model piston rod three-dimensional exploded view;

Fig. 4 is that the utility model is assembled in the air compressor structural drawing;

Fig. 5 is that illustration is implemented in the action of the utility model.

Description of reference numerals: 11 motors; 12 idle pulleys; 13 bearings; 14 piston rods; 15 crankcases; 16 piston heads; 161 grooves; 162 perforation; 163 perforation; 17 cylinders; 18 check valves; 19 suction ports; 21 relief openings; 22 check valves; 164 fixed holes; 165 open-works; 23 check valves; 231 through holes; 232 screws.

Embodiment

Please consult Fig. 2, Fig. 3 simultaneously, the utility model is provided with motor 11, idle pulley 12, bearing 13 and piston rod 14, make piston rod 14 in crankcase 15, turn round action, release in piston head 16 and to return when action, ambient air is entered in the crankcase 15 by suction port 19, enters in the cylinder 17 via piston head 16 again, and when piston head 16 upwards compresses, gas in the cylinder 17 is compressed, and is discharged by relief opening 21 via check valve again, enters the gas receiver that is connected;

The planar central of the piston head 16 of this piston rod 14 is provided with a fixed hole 164, fixing for a check valve 23, and be provided with a plurality of open-works 165 in the periphery of fixed hole 164, wherein, this check valve 23 is round sheets, its center is provided with through hole 231, make a screw 232 pass the fixed hole 164 that is locked on piston head 16 behind the through hole 231, behind the piston head 16 sealed fixedly check valves 23, the flat state that still presents smooth no groove gap, when piston head 16 upwards compressed, the gas of cylinder 17 was compressed, discharge by relief opening 21 again via check valve 18, and in compression process, check valve 23 closely is affixed on the open-work 165 of piston head 16, forms smooth no groove gap blocking, can prevent to commonly use the generation of the residual pneumatics in gap, and make pressurized gas smooth and easy, and to release when returning in addition when piston head 16, air inlet is open shape via pushing away check valve 23 on the open-work 165, open to form, pass through for air.

As shown in Figure 5, the utility model can become flexible shape when piston head 16 returns when action in releasing because the screw 232 of check valve 23 is, and therefore this check valve 23 is able to the open shape that is come-up because of pushing away in the air inlet, and then make open-work 165 be the ventilation opening state, be beneficial to passing through of air.

Claims (1)

1, a kind of structure of oil free type air compressor piston rod is provided with the piston rod that an end is connected in motor in air compressor, makes the to-and-fro motion in cylinder of its piston head, and the formation air pressure contracts and is stored in gas receiver, it is characterized in that:

The plane of this piston head is provided with a center fixation hole, periphery in fixed hole is provided with a plurality of open-works, the thin shape check valve of circle that is provided with through hole for a center passes the fixed hole that is locked on piston head behind the through hole with screw, when piston head in compression or release when returning, this check valve is close to open-work or is the unlatching shape.

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