JPH0442088Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention particularly relates to a waterproof cover device for a cutting machine equipped with a blade for cutting concrete, asphalt, etc.

(Prior art) When cutting concrete, etc. while pouring water into the blade, a cutting machine is designed to prevent a muddy solid-liquid mixture of powdered cutting waste and water from entering the housing. Near the intake port of the housing,
The area around the exhaust port was covered with a cover.

(Problem to be solved by the invention) In the above cover, the suction port opened in the cover on the suction side that covers the vicinity of the suction port of the housing is close to the suction port where air easily flows from this suction port to the suction port. Because the solid-liquid mixture is disposed in such a position, the solid-liquid mixture easily enters the housing, and there is a problem that each member in the housing is damaged by the solid-liquid mixture and there is a risk of electric leakage.

An object of the present invention is to provide a cover device for a cutting machine that can accurately prevent a solid-liquid mixture from entering the housing.

(Means for solving the problem) The present invention is an intake side cover attached to the rear end of the motor housing to cover the vicinity of the intake port for motor cooling air opened in the rear end wall of the motor housing. The interior has a lower piece connected to the lower edge of the suction port opened in the rear wall of the intake side cover, and an upright piece connected to the front edge of this lower piece, and the mist is passed through the suction port. The air and the solid-liquid mixture collide with the upright piece through a separation plate that covers the suction port in a pocket shape across an air flow path that changes the flow direction of the air flowing in with the solid-liquid mixture upward. A suitable number of ribs are provided on the rear side of the upright piece to prevent the solid-liquid mixture from scattering upward. The wall surface and the inner wall surface of the inner wall section erected in front of the rear wall section have ribs projecting thereon to collect the solid-liquid mixture that has passed through the air flow path.

(Function) Air and solid-liquid mixture flowing into the intake side cover through the suction port of the suction side cover attached to the rear end of the motor housing of the cutting machine are directed to the suction side cover opposite to the suction port. The air flow direction is changed upward by colliding with an upright piece of a separation plate which is installed in the interior and covers the suction port in a pocket shape across the air flow path, and prevents the solid-liquid mixture from scattering upward. The solid-liquid mixture that has passed through the air flow path is blocked by ribs protruding from the rear side of the upright piece, and ribs protruding from the inner wall surfaces of the rear wall and inner wall of the intake side cover, respectively. The solid-liquid mixture is collected by the ribs and prevented from entering the motor housing in two stages.

(Example) Next, an example of the present invention will be described with reference to the drawings.

In a cutting machine S used for cutting concrete, asphalt, etc., a motor 2 is housed horizontally in a front-open motor housing 1, and a rear end wall 1 of the motor housing 1 is housed horizontally.
A suitable number of intake ports 3 are opened in the lower part of the motor shaft 2a in a horizontally oblong shape to suck in motor cooling air generated by a fan 4 fitted to the front part of the motor shaft 2a and flowing around the motor 2. There is.

A gear housing 5 connected to the front of the motor housing 1 is fastened to the front end surface of the motor housing 1, and there is a space between the rear end of the gear housing 5 and the front end of the motor housing 1 to direct motor cooling air upward. Exhaust ports 6 to 6 are opened for discharging to both sides, and a protrusion 7 is provided on the outer circumferential surface of the gear housing 5, extending from near the lower end of one side of the outer circumferential surface to near the center of the other side. It is installed protrudingly.

A spindle 8 is rotatably supported laterally with respect to a gear housing 5 and a bearing box 9, and a gear 10 rotatably driven by a motor 2 is fitted to the rear of the spindle 8.

A blade 11 having a cutting edge in which diamond grains are embedded is fitted to the front end of the spindle 8, and
The blade case 12 is attached to the front end of the gear housing 5.

The base 24 is attached to the lower end of the blade case 12 and supported horizontally, and has an insertion hole 24 in its front portion for inserting the blade 11 therethrough.

A seal rod 13 formed in a round rod shape from an elastic material such as a rubber material is connected to the front end surface of the lower end of the motor housing 1;
Joint interface 1 with the rear end surface of the lower end of the gear housing 5
The gear housing 5 seals the gear housing 5 to prevent a muddy solid-liquid mixture of powdery chips cut by the blade 11 and water that cools the blade 11 from passing through the joint interface 14. The motor housing 1 is fitted into an oblong fitting groove 5a recessed in the rear end surface of the lower end of the motor housing 1, and is brought into close contact with the front end surface of the lower end of the motor housing 1.

The exhaust side cover 15 made of synthetic resin seals the vicinity of each exhaust port 6 to prevent the solid-liquid mixture, rainwater, etc. from entering through each exhaust port 6, and to discharge motor cooling air. It is attached to the outer peripheral surface near the front end of the motor housing and the rear outer peripheral surface of the gear housing 5 from near the lower end of one side to near the center of the other side to form a flow path, and to flow air. The front edge 15b of the base 15a, which is formed into a substantially bowl-shaped cross section, is connected to the protrusion 7.
At the rear of the base 15a, a base 15 is provided in order to make the motor housing 1 come into close contact with the outer peripheral surface of the motor housing 1 in a liquid-tight manner.
A flange portion 15c extends rearward over the entire length of the base portion 15c and has a lower end portion formed into a substantially semicircular shape in plan view. Mounting hole 1 for
5d and 15d are formed.

A cylindrical intake side cover 16 made of synthetic resin covers the vicinity of the intake port 3 and the rear end wall 1a of the motor housing 1 to prevent the solid-liquid mixture from entering through the intake port 3. Its front end is fastened to the outer circumferential surface of the motor housing 1 with a tightening band 17 and attached to the rear end of the motor housing 1, and a suction port 18 is provided in the center of the rear wall 16a of the rear end in a horizontally elongated shape. The rear wall portion 16a is opened, and an inner wall portion 16b is provided with ribs 20, 20 projecting vertically in parallel from the inside of the rear wall portion 16a and attached to the rear end wall 1a of the motor housing 1. A rib 23 is horizontally protruded on the inner surface near the lower end of the rear wall portion 16a, and a rib 23 is provided at the lower end of the front end of the intake side cover 16 to prevent air discharged from the exhaust port 6 from moving toward the intake port 18 side. A plate piece 16c is suspended to prevent water from scattering.

A separation plate 21 having a substantially L-shaped cross section separates the atomized solid-liquid mixture that flows into the intake side cover 16 through the suction port 18 along with air.
In order to separate the solid-liquid mixture from the air by colliding with and collecting the air and converting the flow direction of the air horizontally flowing into the suction port 18 from the rear upwards, The rear end is integrally hung horizontally between the both side walls 16d facing the suction port 18,
The horizontally formed lower piece 21a is connected to the lower edge of the suction port 18, while the upright piece 21 is provided at the front end of the lower piece 21a and is opposed to the inside of the suction port 18.
On the rear side surface of b, a pair of ribs 22, 22 extending laterally to the rear in order to prevent the solid-liquid mixture from scattering upward is provided so as to protrude vertically in parallel over the entire length of the separation plate 21. ing.

The atomized solid-liquid mixture that has flowed in from the rear with air through the suction port 18 collides with the upright piece 21b of the separation plate 21 and is collected on the lower piece 21a, while the air for cooling the motor is absorbed into the upright piece. 21b and separates from the solid-liquid mixture and flows upward, and then passes between the upright piece 21b and the inner wall 16b in a folded manner and flows downward.
is introduced into the motor housing 1 through. Note that a portion of the mist solid-liquid mixture that is not collected by the separation plate 21 is collected by the ribs 20 of the inner wall portion 16b and the ribs 23 of the rear wall portion 16a.

Next, the operation and effects of the embodiment having the above configuration will be explained.

In this example, an intake side cover 16 is installed near the rear end of the motor housing 1 to cover the vicinity of the intake port 3 for motor cooling air opened in the rear end wall 1a of the motor housing 1. It has a lower piece 21a connected to the lower edge of the suction port 3 opened in the rear wall portion 16a of the intake side cover 16, and an upright piece 21b connected to the front edge of this lower piece 21a. A separation plate 21 that covers the suction port 3 in a pocket shape across an air flow path that changes the flow direction of air flowing in together with the atomized solid-liquid mixture upward.
is installed facing the suction port 3 so that the air and the solid-liquid mixture collide with the upright piece 21b, and a pair is provided on the rear side of the upright piece 21b to prevent the solid-liquid mixture from scattering upward. Along with protruding ribs 22,
Ribs 20 for collecting the solid-liquid mixture that has passed through the air flow path are protrudingly provided on the inner wall surface of the rear wall portion 16a and the inner wall surface of the inner wall portion 16b standing upright in front of the rear wall portion 16a. There is.

For this reason, the separation plate 21 catches the atomized solid-liquid mixture generated during cutting of concrete, etc., accurately separates the solid-liquid mixture from the air, and only the air for cooling the motor is sent to the intake port 3. can be introduced,
Accurately prevents the solid-liquid mixture from entering from the intake port 3 and prevents the solid-liquid mixture from entering the motor housing 1 and the gear housing 5.
This has the effect of preventing the motor 2, the rotation transmission mechanism, the bearing member, etc., from being damaged by the solid-liquid mixture, as well as the risk of electrical leakage.

Furthermore, on the exhaust side, the front edge 1 of the exhaust side cover 15 is
5b is hermetically engaged with the outer circumferential surface of the gear housing 5 via the protrusion 7, and the flange portion 15c of the exhaust side cover 15 is brought into close contact with the outer circumferential surface of the motor housing 1. The space between the outer peripheral surface and the exhaust side cover 15 and the space between the outer peripheral surface of the motor housing 1 and the exhaust side cover 15 are sealed to prevent solid-liquid mixtures, rainwater, etc. from entering from the front and rear of the exhaust port 6. It can definitely be prevented.

Further, a joint interface 1 between the front end surface of the lower end of the motor housing 1 and the rear end surface of the lower end of the gear housing 5 is provided.
4 is hermetically sealed with the seal rod 13, it is possible to reliably prevent the solid-liquid mixture stored in the gap between the motor housing 1 and the base 24 from passing through the joint interface 14.

In addition, in the case of a relatively small-sized cutting machine, instead of the separating plate 21 of the above embodiment, as shown in FIG.
Separation plate 2 with stepped portion 25 on exhaust side cover 15A
1A may be formed.

(Effects of the invention) Since the present invention is constructed as described above, the air and solid-liquid mixture flowing from the outside air into the intake side cover through the intake port collide with the upright piece of the separation plate. The air is diverted upward and introduced accurately into the intake side cover to ensure an air cooling effect on the motor, and the upright piece prevents the solid-liquid mixture that collides with the upright piece from scattering upward. The solid-liquid mixture is collected in the first stage by a rib protruding from the suction port, and the solid-liquid mixture that has passed through the air flow path between the suction port and the separation plate is collected in the suction air. The solid-liquid mixture, especially solids, which has been collected by the ribs on the rear wall and the inner wall of the side cover and flowed into the intake side cover can be collected in two stages, so that the solid-liquid mixture can be collected in two stages. The collection effect can be synergistically enhanced.

When the solid-liquid mixture flows with air, the solid-liquid mixture flows along the inner wall surface of the flow channel due to the difference in specific gravity with the air and comes into contact with the inner wall surface, so that the solid-liquid mixture that has passed through the air flow channel To accurately prevent solid-liquid mixtures, especially solids, from entering the motor housing by collecting solids, especially solids, without leaking by the ribs on the inner wall surface of the rear wall and inner wall of the intake side cover. I can do it.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view of a cutting machine, and Fig. 2 is a cross-sectional view taken along line X1-X in Fig. 1.
1-line sectional view, Figure 3 is a plan view of the exhaust side cover, Figure 4 is also a rear view, and Figure 5 is the X2-X in Figure 1.
6 is a view taken along the line X3-X3, and FIG. 7 is a longitudinal sectional view showing another example of the exhaust side cover. 1...Motor housing, 3...Intake port, 5...
... Gear housing, 6 ... Exhaust port, 15 ... Exhaust side cover, 16 ... Intake side cover, 18 ... Suction port, 21 ... Separation plate.

Claims (1)

[Scope of utility model registration request] Inside the intake side cover installed near the rear end of the motor housing to cover the vicinity of the intake port for motor cooling air opened on the rear end wall of the motor housing, there is a It has a lower piece connected to the lower end edge of the opened suction port, and an upright piece connected to the front end edge of this lower piece, and the flow direction of the air flowing together with the atomized solid-liquid mixture through the suction port. A separation plate that covers the suction port in a pocket shape across an air flow path that diverts the air upward is installed opposite to the suction port so that the air and the solid-liquid mixture collide with the upright piece. An appropriate number of ribs are provided on the rear side of the upright piece to prevent the solid-liquid mixture from scattering upward, and ribs are provided on the inner wall surface of the rear wall and in front of the rear wall. 1. A cover device for a cutting machine, wherein ribs are provided on the inner wall surface of the inner wall portion to collect the solid-liquid mixture that has passed through the air flow path.