CN201321816Y - Air-leg type high-speed rock drill - Google Patents

Abstract

The utility model relates to an air-leg type high-speed rock drill which comprises a grab handle, a cylinder body and a machine head. A grab handle sleeve is sheathed on the grab handle; a valve bank, a piston and a spiral rod are arranged in the cylinder body; a silencing cover is arranged at the position of an air outlet on the cylinder body, and a bit shank sleeve is arranged in the machine head. The rock drill is characterized in that the grab handle sleeve comprises an outer sleeve and an inner sleeve which are sheathed together, a strip-shaped bulge or a cylinder-shaped bulge is arranged on the outer surface of the outer sleeve, and a plurality of connecting ribs which are arrayed in radiation shape are arranged between the outer wall of the inner sleeve and the inner wall of the outer sleeve. The air-leg type high-speed rock drill has the characteristics of good effects of shock-absorbing and silencing, long service life, low failure rate, high utilization air pressure and high rock drilling speed; the rock drilling speed of the air-leg type high-speed rock drill is 50% higher than that of the conventional rock drill; therefore, the air-leg type high-speed rock drill is a regeneration product of the present rock drill.

Description

Gas leg type high speed rock drill

Technical field

The utility model relates to a kind of gas leg type high speed rock drill.

Background technology

Hammer drill be a kind of on rock the machine in Drilling hole, its groundwork principle is with calming the anger as power, move back and forth by the passive valve control piston, piston impact drilling tool cutter crushed rocks during stroke; During backhaul, piston drives the certain angle of drilling tool revolution, and continuous impact, revolution make drilling tool dig out circular big gun hole on rock.High speed rock drill because the vibrations that periodic impact and rotation produce strengthen, though most of vibrations can be absorbed by machine, still has the part vibrations to pass to the operator by handle in work, makes the operator be difficult to stand.In addition, high speed rock drill periodically with the compressed air discharging, has just produced noise in work, and along with the lifting of compressed air pressure, exhaust frequency and intensity also increase, and work the mischief for environment and operator.The moving component of hammer drill is very easy to wearing and tearing in the process of running up, form fault.

Summary of the invention

The purpose of this utility model provides that a kind of cutting rate is fast, damping, excellent noise reduction effect, the gas leg type high speed rock drill that the life-span is long.

For achieving the above object, the utility model is by the following technical solutions:

Gas leg type high speed rock drill described in the utility model comprises lever, cylinder body and head, be set with the lever cover on the lever, be provided with valve group, piston and rifle bar in the cylinder body, exhaust ports on cylinder body is equipped with silencer cover, be provided with the bit shank cover in the head, it is characterized in that: described lever cover comprises overcoat and the interior cover that is sleeved on together, the projection that has strip or column on the external surface of overcoat, have the connection rib of a plurality of radial arrangements between the outer wall of interior cover and the inwall of overcoat, be convenient to damping.

Described silencer cover comprises cover body, and cover body is a cavity structure, and its lower end has the interface that is connected with the hammer drill exhaust opening, has a flat stack in the side of cover body, has a plurality of pores that are communicated to mask body intracavity in the stack; In the sidewall of cover body and stack, all have canvas layer, reduced noise.

The external surface of described valve group, piston and rifle bar all has the high hardness wear-resisting layer, improves 30% than the conventional products abrasion resistance.

This gas leg type high speed rock drill damping, excellent noise reduction effect, long service life, fault rate are low, and cutting rate is fast, and this product uses air pressure than conventional products air pressure height, and cutter speed improves 50% than conventional products, and abrasion resistance improves 30% than conventional products.It is the renewal product of existing hammer drill., abrasion resistance improves 30% than conventional products.

Description of drawings

Fig. 1 is the longitudinal sectional view of a kind of embodiment of the utility model;

Fig. 2 is the longitudinal sectional view of lever cover;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is the silencer cover sectional view;

Fig. 5 is the structural representation of stack;

Fig. 6 is the vertical view of Fig. 4.

The specific embodiment

The utility model will be further described below in conjunction with the drawings and specific embodiments.

As shown in Figure 1, gas leg type high speed rock drill described in the utility model comprises lever 7, cylinder body 8 and head 9, is set with lever cover 1 on the lever 7, is provided with valve group 2, piston 4 and rifle bar 5 in the cylinder body 8, exhaust ports on cylinder body 8 is equipped with silencer cover 3, is provided with bit shank cover 6 in the head 9.The external surface of described valve group 2, piston 4 and rifle bar 5 all has wearing layer.Specifically: the wearing layer of the external surface of valve group 2 is ionic nitriding layers; The wearing layer of the external surface of piston 4 is that deep-hardening layer, high case depth reach 2.5mm, and carbide morphology is in the 1-2 level; The wearing layer of the external surface of rifle bar 5 is ionic nitriding layers; These wearing layers can protect parts not worn and torn too early well, effectively improve the application life of complete machine.

As Fig. 2, shown in Figure 3, lever cover 1 comprises overcoat 11 and the interior cover 13 that is sleeved on together, has the projection 12 of strip or column on the external surface of overcoat 11, has the connection rib 14 of a plurality of radial arrangements between the inwall of the outer wall of interior cover 13 and overcoat 11.Cover 13 floats by connection rib 14 with overcoat 11 and is connected the vibrations that produce in the time of can well absorbing hammer drill work like this.As shown in Figure 3, if connection rib 14 is arranged to axis with lever cover 1 certain angle that tilts, can play the effect of damping better.

As Fig. 4---shown in Figure 6, silencer cover 3 adopts the rubber of folder canvas layer to make, and can improve its mechanical strength on the basis that keeps the soft noise reduction of rubber, helps reducing volume, reduces height.This silencer cover 3 comprises the cover body 31 of circular cavity structure, and its lower end has the interface 32 that is connected with the hammer drill exhaust opening, has a flat stack 33 in the side of cover body 31, has a plurality of pores 34 that are communicated to cover body 31 inner chambers in the stack 33; Pore 4 horizontally becomes a row.The structure of this a plurality of spileholes can reduce noise to greatest extent when guaranteeing extraction flow.

The structure of other parts of the utility model is a known technology, and this repeats no more again.

Claims (3)

1, gas leg type high speed rock drill, comprise lever (7), cylinder body (8) and head (9), be set with lever cover (1) on the lever (7), be provided with valve group (2) in the cylinder body (8), piston (4) and rifle bar (5), exhaust ports on cylinder body (8) is equipped with silencer cover (3), be provided with bit shank cover (6) in the head (9), it is characterized in that: described lever cover (1) comprises overcoat (11) and the interior cover (13) that is sleeved on together, the projection (12) that has strip or column on the external surface of overcoat (11) has the connection rib (14) of a plurality of radial arrangements between the inwall of the outer wall of interior cover (13) and overcoat (11).

2, gas leg type high speed rock drill according to claim 1, it is characterized in that: described silencer cover (3) comprises cover body (31), cover body (31) is a cavity structure, its lower end has the interface (32) that is connected with the hammer drill exhaust opening, have a flat stack (33) in the side of cover body (31), have a plurality of pores (34) that are communicated to cover body (31) inner chamber in the stack (33); In the sidewall of cover body (31) and stack (33), all have canvas layer (35).

3, gas leg type high speed rock drill according to claim 1 and 2 is characterized in that: the external surface of described valve group (2), piston (4) and rifle bar (5) all has wearing layer.

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