JP2546052Y2 - Exhaust cover device for driving machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an exhaust cover device provided at an exhaust port of a driving machine using compressed air as a power source.

[Conventional technology]

 FIG. 6 shows a conventional driving machine having an exhaust cover.

In the drawing, 1 is an exhaust cover, 2 is a body, 3 is an exhaust cover, 4 is a bolt for fixing the exhaust cover 1 to the exhaust cover 3, 5 is a main body, and 8 is an exhaust port.

A driving machine that reciprocates a striking piston (not shown) using compressed air as a power source generally needs to discharge the compressed air flowing into the upper part of the striking piston to the atmosphere during the returning process of the striking piston. An exhaust port 8 which is an outlet of the exhaust cover 3 is provided above the exhaust cover 3.

Conventionally, the exhaust cover 1 is generally configured to exhaust in one direction. In addition, since the exhaust cover 1 is made of a steel plate, the exhaust cover easily resonates with the exhaust cover 3 due to the vibration of the exhaust, and the exhaust sound is increased. There is also a problem that the bolt 4 is easily damaged from the vicinity of the tightened portion. Further, depending on the working method of the driving machine, there is a problem that the exhaust gas hits the operator's face or winds up dust. In order to solve such a problem, as shown in FIGS. 7 and 8, the exhaust direction from the exhaust cover is changed.

[Problems to be solved by the invention]

In the case of the exhaust cover 1A shown in FIG. 7, by rotating the exhaust cover 1A while pressing the spring 9,
In the case of the exhaust cover 1 shown in the drawing, the exhaust direction of the compressed air discharged from the exhaust port 8 is changed to an arbitrary direction by rotating the exhaust cover 1 while loosening the bolts 4.

That is, the exhaust cover 1A shown in FIG. 7 is attached to the exhaust port 8 from the inside of the exhaust cover 3 to prevent the exhaust cover 1A from jumping out due to the pressure of the exhaust gas. Exhaust leakage is prevented. Therefore, in order to attach and disassemble the exhaust cover 1A, it is necessary to disassemble and assemble the exhaust cover 3 which is originally unnecessary.

In addition, the exhaust cover 1 shown in FIG. 8 needs to be screwed with bolts 4 and provided with an O-ring 6 between the exhaust cover 1 and the exhaust cover 3 so that the exhaust does not leak in other directions. is there. Therefore, there are disadvantages that the number of parts is increased, the cost is increased, and the overall weight is increased. The exhaust cover 1 resonates with the exhaust cover 3 and the exhaust noise is increased. There is a problem similar to that in FIG. 6 that the bolt 4 is easily damaged from the vicinity of the screwed portion.

An object of the present invention is to improve disassembly and assembly of this kind of exhaust cover, and to minimize the number of parts and reduce the weight to improve operability.

[Means for solving the problem]

In order to achieve the above object, the exhaust cover device of the present invention uses compressed air as a power source and discharges compressed air consumed for driving into the atmosphere through an exhaust port provided on an upper part of the exhaust cover. In the exhaust cover device of a driving machine, a ring-shaped locking groove provided on the outer periphery of the projecting portion of the exhaust cover, and a lip portion is engaged with a peripheral end of the locking groove, and an opening is formed on a part of the outer periphery. And an exhaust cover made of an elastic body provided with the above.

[Action]

The present invention is characterized in that, for example, the lower lip portion of the exhaust cover made of an elastic material such as rubber is elastically deformed into a locking groove projecting near the exhaust port of the exhaust cover so as to be press-fitted and attached. Therefore, the exhaust cover can be attached and detached from the outside, the number of parts can be minimized, the weight can be reduced, and the operability can be improved.

〔Example〕

1 to 5 show an embodiment of the driving machine equipped with the exhaust cover device of the present invention.

In the drawing, 1 is an exhaust cover, 2 is a body, 3 is an exhaust cover, 5 is a main body, 7 is a piston, 8 is an exhaust port, 9 is a spring, 10 is a convex portion having a flat upper surface of the exhaust cover 3, 11 and 12, Are the lip and opening of the exhaust cover 1, 31 and 32 are the wall and locking groove of the exhaust cover 3, 100 is the cylinder head, 101 is the cylinder head 10
It is an exhaust passage provided in 0.

The exhaust cover 1 is provided with an opening 12 obliquely downward,
In the upper part on the opposite side, there are a plurality of notches as shown in FIG.
13 are provided. The spring 9 is connected to the exhaust passage.
It is installed in 101.

A plurality of the exhaust ports 8 are provided above the exhaust cover 3 and are provided below the convex portions 10 so as to open radially outward, and the exhaust cover 3 near the exhaust port 8 is entirely provided with a locking groove 32. It is formed in a ring shape over the circumference. The exhaust cover 1 is integrally formed of an elastic material such as rubber, and has therein a lip portion 11 which engages with a peripheral end of the locking groove portion 32.
Are formed all around except for the opening 12. Exhaust cover 1
Since the inner diameter D of the lip portion 11 is elastically deformed and press-fitted into the locking groove portion 32, the lip portion 11 does not fly out due to the pressure of the exhaust gas even without screwing with the bolt 4. Further, the inner diameter D of the lip 11 of the exhaust cover 1 is equal to the outer diameter d of the locking groove 32.
Since no gap is formed due to the elasticity of the elastic material, the leakage of exhaust gas to portions other than the opening 12 is also prevented. As described above, a plurality of exhaust ports 8 of the exhaust cover 3 are provided, and most of the compressed air is discharged from the exhaust port 8 near the opening 12 through the opening 12 and is separated from the opening 12. The compressed air from the exhaust port 8 passes through the gap between the exhaust cover 3 and the exhaust
, The pressure of the exhaust gas that causes the exhaust cover 1 to fly out of the exhaust cover 3 decreases, and the possibility that the exhaust cover 1 jumps out due to the exhaust pressure is further reduced.

Since the exhaust cover 1 is stopped by the sliding resistance of only the elasticity of the elastic material in the radial direction, as shown in FIG.
0 ° can be changed in any direction with one touch.

In order to remove the exhaust cover 1, it is only necessary to elastically deform the lip portion 11 by putting a finger on the notch portion 13, expand the lip portion 11, and remove the lip portion 11 from the locking groove portion 32.

[Effect of the invention]

As described above, according to the present invention, since the exhaust cover is made of an elastic material such as rubber, the exhaust cover can be engaged with the exhaust cover by utilizing elastic deformation, and can be attached and detached from the outside without screws such as bolts. And the exhaust cover can be easily rotated, so that the exhaust direction can be arbitrarily changed. In addition, since a plurality of exhaust ports of the exhaust cover are provided to reduce the exhaust pressure acting on the exhaust cover, the possibility that the exhaust cover jumps out of the exhaust cover is reduced. Further, the number of parts is minimized, the weight of the driving machine body is reduced, and the operability of the driving machine is improved.

[Brief description of the drawings]

1 is a side view showing an embodiment of the driving machine equipped with the exhaust cover device of the present invention, FIG. 2 is a partial sectional view showing a main part of FIG. 1, and FIG. 3 is an exhaust cover of FIG. , FIG. 4 is a cross-sectional view showing a main part before the exhaust cover is mounted, FIG. 5 is a plan view, FIG. 6 is a perspective view showing a conventional driving machine, and FIGS. It is a sectional view showing an example of the conventional exhaust cover device. In the figure, 1 is an exhaust cover, 3 is an exhaust cover, 8 is an exhaust port, 11 is a lip, and 32 is a locking groove.

Claims (1)

(57) [Scope of request for utility model registration] 1. A driving machine body having a built-in cylinder and piston, a plurality of exhaust ports provided below the projections and the projections, and opened outward in the radial direction, and a ring-shaped one provided on the outer periphery of the exhaust ports. An exhaust cover having a locking groove, mounted above the driving machine body; a lip having an inner diameter smaller than the outer diameter of the locking groove of the exhaust cover; an opening provided in a part of the outer circumference; An exhaust cover made of an elastic body having a notch, wherein the lip portion of the exhaust cover is engaged with a locking groove of the exhaust cover, and compressed air from the exhaust port of the exhaust cover is passed through the opening of the exhaust cover. An exhaust cover device for a driving machine characterized by discharging to the atmosphere.