CN2275031Y - Pneumatic chisel - Google Patents

Abstract

The utility model relates to a pneumatic chisel which is used for carving the stone. The utility model belongs to a pneumatic tool. An air nozzle is arranged on the tail part of an outer sleeve. The radial direction small hole of the air nozzle is communicated with the outer sleeve, the air nozzle and ring grooves between the walls of air cylinders, and an air admission passage is formed. The air cylinder depends on the interference fit, and the air cylinder is installed in the outer sleeve. Four groups of air passages are regularly distributed on the air cylinder. Each group of air passage has corresponding small holes, and the corresponding small holes are communicated with the inner part of the air cylinder. The air cylinder is a cylinder body as well as performs reversing valve function. The air cylinder and a piston constitute a valveless air distribution mechanism. A drill is installed on the front part of the outer sleeve through the clearance fit. The drill depends on the impact of the piston to go on with reciprocating movement. The purpose of carving is achieved. The utility model uses the compressed air as the force source. So long as a hand holds the pneumatic chisel to move along a carving surface, the purpose of carving can be achieved. Not only the utility model saves labor, but also the utility model has high efficiency. The utility model is an ideal tool for carrying out carving for fragile materials.

Description

Pneumatic chisel

The utility model relates to a kind of Pneumatic chisel that is used for engraved stone, belongs to pneumatic tool.

When stone material and other fragile material are carved, be instrument just since ancient times with hammer and chisel, time-consuming, effort, engraving artist labour intensity is very big.

The purpose of this utility model is in order to overcome above-mentioned weak point of the prior art, is the Pneumatic chisel of power source with compressed air and provide a kind of.

The purpose of this utility model be achieved in that it by overcoat, gas chew, cylinder, piston, hammer drill, gland etc. constitute.The overcoat afterbody has gas to chew by screw-internal thread fit, and this gas is chewed aperture radially is set, this aperture and overcoat be gentle chew and cylinder wall between cannelure be connected, gas is chewed the front portion and is the boss shape; There is cylinder at the overcoat middle part by interference fit, four groups of air flues are regularly distributing on this cylinder outer wall, every group of air flue all has corresponding aperture to be communicated with cylinder interior, wherein one group of air flue and overcoat external communications constitute the exhaust passage, cannelure is set in the piston, anterior and valve rod is fixed, and this piston and cylinder constitute no valve distributing mechanism; Hammer drill is equipped with by matched in clearance in the overcoat front portion, and the front portion of hammer drill is passed the gland central through hole and extended forward, and gland is connected with the overcoat front end by its internal thread.

The utility model compared with prior art, because adopting compressed air is power source, therefore greatly reduce engraving artist's labour intensity, as long as the hand-held pneumatic chisel moves the purpose that just reaches engraving along sculptured surface, both laborsaving, efficient is high again, is the ideal tools of new generation of carrying out the fragile material engraving.

The explanation of accompanying drawing drawing:

Accompanying drawing is this reality and novel structural representation.

Below in conjunction with drawings and Examples in detail the utility model is described in detail.

The utility model is chewed (1), cylinder (2), piston (3), overcoat (4), hammer drill (5), bead (6), gland (7), valve rod (11) formation by gas.Gas is chewed (1) connector for chisel and source of the gas, it is tightened in the overcoat (4) by the internal thread of overcoat (4) afterbody, gas is chewed (1) aperture (19) radially is set, this aperture (19) is communicated with cannelure (18) between gentle chewing of overcoat (4) (1) and cylinder (2) wall, the radial hole (19) that compressed air is chewed on (1) by gas enters this cannelure (18), gas is chewed (1) front portion and is the boss shape, this boss limited piston (3) backhaul extreme position, prevent to occur when piston from moving to leftmost position the dead point, gas is chewed the right step end face of (1) and cylinder (2) left side and is compressed and make cylinder rear gas chamber (17) obtain sealing.At overcoat (4) middle part, it is cylinder block in this structure to cylinder (2) by interference fit, plays the commutation valve body again.The four groups of air flues that distributing regularly on this cylinder (2) wall, every group of air flue all has corresponding aperture to be communicated with cylinder (2), and each aperture opens or closes with the axial location difference of piston in cylinder (2).Piston (3) middle part is provided with annular groove (14), and anterior fixing with valve rod (11), this piston (3) constitutes no valve distributing mechanism with cylinder (2).The gases at high pressure that first group of air flue (15) chewed gas (1) feeding flow in the middle part of the pistons (3) and the annular groove (14) between cylinder (2) wall; Second group of air flue (16) imports the high pressure gas in the annular groove (14) rear gas chamber (17) of piston (3) left end in piston (3) axial location certain limit, high pressure gas promotes piston (3) and moves right; The 3rd group of air flue (13) gone into annular groove (14) inner high voltage conductance the preceding air chamber (12) of piston (3) right-hand member in piston axial location certain limit, high pressure gas promotes piston (3) and moves to left; In the physical dimension design, second group of air flue (16) is a watt lock with the 3rd group of air flue (13), i.e. during second group of air flue (16) conducting, the 3rd group of air flue (13) closed, and vice versa; The 4th group of air flue (5) is the exhaust duct of forward and backward air chamber (12) (17), its other end is that atmosphere is communicated with formation exhaust passage (6) with overcoat (4) outside, fall so that will not feed the interior toxic emission of air chamber of high pressure gas, reduce the pressure in this air chamber, help the piston motion.Acting on all over the body of piston (3) collection piston, valve rod (11) and hammer.Piston (3) is a matched in clearance with cylinder (2), piston (3) can move freely in cylinder (2) vertically, in the course of work, and the diverse location of piston (3) in cylinder (2), open or close pores different on the cylinder wall, the distribution and the exhaust of air chamber (12) (17) before and after finishing.Under compressed air promoted, piston (3) can produce axial double vibrations, and when moving right, piston (3) bump clock caudal peduncle portion (7) impacts hammer drill forward, finishes incised work.Overcoat (4) is the housing of this instrument, is the supporting part of each part.Hammer drill is the cutter of engraved stone, and its head grinds cutting edge, and the caudal peduncle portion of hammer drill is contained in overcoat (4) front portion by matched in clearance, and the front portion is passed gland (9) central through hole and extended forward, and gland (9) is connected with overcoat (4) front end by internal thread.Under the promotion of valve rod (11), hammer drill can move freely vertically, finishes processing of stone.The utility model has axial straight trough (10) in the garden of steel shank shank (7) on week, this straight trough (10) afterbody is communicated with exhaust passage (6), the front portion is communicated with gland (9) central through hole, the waste gas of discharging in the cylinder can be arranged to the chisel right-hand member by this straight trough (10), blow away chip ballast and the dust inscribed, be convenient to engraving and proceed.One of them embeds bead (8) described straight trough (10), in order to the rotation of restriction hammer drill.

Claims (2)

1, a kind of Pneumatic chisel comprises that overcoat, gas are chewed, cylinder, piston, hammer drill, gland, it is characterized in that:

A, overcoat afterbody have gas to chew by screw-internal thread fit, and this gas is chewed aperture radially is set, this aperture and overcoat be gentle chew and cylinder wall between cannelure be connected; Gas is chewed the front portion and is the boss shape;

There is cylinder at b, overcoat middle part by interference fit, four groups of air flues are regularly distributing on this cylinder wall, every group of air flue all has corresponding aperture to be communicated with cylinder interior, wherein one group of air flue and overcoat external communications constitute the exhaust passage, the piston middle part is provided with cannelure, anterior and valve rod is fixed, and this piston and cylinder constitute no valve distributing mechanism;

Hammer drill is equipped with by matched in clearance in c, overcoat front portion, and through hole extended forward in the middle part of gland was passed in the hammer drill front portion, and gland is connected with the overcoat front end by internal thread.

2, Pneumatic chisel according to claim 1 is characterized in that the garden of steel shank shank has axial straight trough on week, this straight trough afterbody and exhaust passage UNICOM, and the front portion is communicated with the gland central through hole, and one of them straight trough embeds bead.