KR100789887B1 - Vibrator for concrete pavement - Google Patents

Abstract

A vibrator for removing air bubbles in concrete is provided to increase sealing capacity not to let alkali-containing substances of concrete, water and air through by outputting stable oscillation frequency with a vibrating cable and to prevent overload of a motor by reducing the rotational frequency provided from the motor and thereby redoubling torque. A vibrator(100) for removing air bubbles in concrete comprises a driving unit(110) having a DC brush motor(112) built-in to impart high torque to a vibrator to increase efficiency at air bubble removal work with low noise, a speed reducing unit(120) having a through hole(121c) and a housing space(121b) engaged with an electronic gear(113) and a reduction gear(122) to reduce the rotational frequency of driving force provided by the motor and to output the torque increased by a driven shaft(122a) fixed to the center of the reduction gear, and a vibrating cable installed to the speed reducing unit to set up vibrations and converting the torque of a cable into repeated vibration force by combining a coupling(131) to the front of a coupling flange(121a) to make the driven shaft located in the coupling and connected with one side of a flexible cable, and combining a vibrating rod to the other side of the cable, wherein a body formed by coupling the driving unit and the speed reducing unit is installed at a mounting bracket(140) to maximize portability of the vibrator.

Description

Vibrator for Concrete Bubble Removal {Vibrator for concrete pavement}

1 is a partial cross-sectional view showing a brush motor applied to the concrete bubble removing vibrator according to the present invention.

Figure 2 is a side view showing a brush motor applied to the concrete bubble removing vibrator according to the present invention.

Figure 3 is a perspective view showing a concrete bubble removing vibrator according to the present invention.

Figure 4 is an exploded perspective view showing a concrete bubble removing vibrator according to the present invention.

Figure 5 is a side cross-sectional view showing a concrete bubble removing vibrator according to the present invention. Perspective view.

<Description of the symbols for the main parts of the drawings>

      100: vibrator 100a: body portion

110: drive unit 111: case

111a: internal space 111b: fixed hole

112: motor 113: electric gear

120: reduction unit 121: cover

121a: combined flange 121b: storage space

121c: through hole 121d: coupling hole

122: reduction gear 122a: driven shaft

130: vibration cable 131: coupling

132 cable 133: vibration rod

140: mounting bracket 141: bottom surface

142: fixing plate 142a: aeration hole

143: handle

The present invention relates to a vibrator for removing concrete bubbles, and more particularly, by mounting a speed reducer on a motor generating a driving force, by reducing a rotational speed and increasing or decreasing a rotational force, by vibrating load generated by penetrating a vibrating cable into concrete. It relates to a concrete bubble removal vibrator to minimize the load of the motor to maintain the stability of the motor, improve the portability to improve the work efficiency of the concrete bubble removal.

In general, concrete vibrator refers to a machine that vibrates concrete packed in formwork and removes gaps or stains and solidifies it. It is used for compacting to increase adhesion strength of poured concrete and to eliminate voids.

The concrete vibrator is composed of a motor that rotates at high speed, a flexible shaft fixed to the motor shaft of the motor by a coupling, a flexible hose for accommodating the flexible shaft, and a vibration rod fixed to the tip of the flexible shaft. The rotating shaft in the vibrating rod in which the power of the rotating motor is fixed to the tip of the flexible shaft rotates to act as a vibrator.

This concrete vibrator increases the adhesion strength of the concrete that is poured when the user works while holding the flexible hose of the concrete vibrator and moves the vibrating rod to the required place when concrete placement is required.

In other words, the composition of the concrete mortar before curing, sand, gravel, cement, liquid water, and air bubbles are nothing but a mixture, and each material forms one form by each frictional force. Yarns resist each other to mix with different materials.

At this time, if the concrete is mixed immediately after the vibration through the concrete vibrator, the motion of the aggregate (sand aggregates like sand and gravel like aggregates) is proportional to the vibration acceleration given and inversely proportional to the mass. Large aggregates have less movement, and smaller aggregates move larger.

This is due to the high frequency oscillation provided by the vibrator, which causes the oscillation frequency to hardly change, but the amplitude decreases with distance. The cement paste and fine aggregate are liquefied around the point where the vibration is applied, and the gap between the coarse aggregate is filled, and the upper part is pushed up to convert the voids into a closed room to densify the concrete mortar structure, thereby improving the strength of the concrete mortar after curing. Let's do it.

The concrete vibrator according to the prior art is a small motor (1), as shown in the Republic of Korea Utility Model Publication No. 1999-002499, and a vibration shaft (2) extending from the shaft of the motor supported by the bearing (4) And a vibrating case 3 surrounding the motor and the vibrating shaft, and a handle bar 5 extending from an end of the motor side of the vibrating case and passing through a power supply line 11 of the motor.

In this concrete pouring vibrator, the driving force provided from the motor is transmitted to the handle bar through the vibration shaft to vibrate the vibrator, but as the rotational force of the motor providing the high-speed rotational force is transmitted to the vibrator without being decelerated, by the high-speed rotational speed. There is a problem that the output torque is relatively reduced.

As a result, when the vibrator penetrates into the concrete having a viscous viscosity, a vibration load is generated to hinder the rotational force of the motor, thereby causing an overload of the motor.

This causes the internal damage of the motor, shortens the life of the motor and stably does not output the rotational force to generate even vibration, there was a problem that the air bubbles in the concrete can not be effectively removed.

 In addition, as described above, by applying a motor of a large capacity in order to ensure the rotational force of the power as high as the high speed rotation, the operator can not easily carry or move the vibrator through a separate moving means equipped with a caster There was nothing but a problem.

As a result, there was a problem in that the efficiency of the concrete bubble removal operation falls.

Therefore, the main object of the present invention is to enable the output of a stable frequency with a vibrating cable through the vibrator maximized the rotational force (torque) by the reducer to improve the tightness that does not pass the alkali component of the concrete, water, air, etc. There is to help.

In addition, another object of the present invention is to reduce the number of revolutions provided by the motor to double the rotational force to prevent the overload of the motor.

Another object of the present invention is to reduce the rotational speed and to increase the portability of the vibrator can be applied to a small motor capable of ensuring a high output by the reducer to double the rotational force.

In addition, another object of the present invention is to mount the body portion consisting of a combination of the drive unit and the reduction unit further includes a mounting bracket for the operator to grip and carry separately to maximize the portability of the vibrator.

Furthermore, another object of the present invention is to minimize the overload and damage of the motor by effectively discharging the heat of the motor from the case in which the motor is built.

In order to achieve the object of the present invention, the concrete mortar vibrator of the present invention includes a drive unit in which a motor is mounted on a rotating shaft of the motor, in which a motor is built in a case in which one side inner space is opened, The cover is coupled to the end of the space, the cover is formed in such a way that the one side is opened so as to partially communicate the receiving space for mounting the through-hole and the reduction gear in which the electric gear is coupled to the front of the coupling flange for partitioning the internal space. A reduction unit for outputting the increased or decreased rotational force to the driven shaft fixed in the center of the reduction gear by decelerating the rotational speed of the driving force provided by the motor by the engagement, and coupling the coupling to the front of the coupling flange. So that the driven shaft is centered inside the coupling and then the cable It is installed so as to connect with the side, and the other side of the cable is characterized in that the vibration cable is configured to convert the rotational force of the cable to the repetitive vibration force by coupling the vibration rod.

According to the present invention, a fixing hole is formed at the front edge portion of the inner space of the case, and the coupling hole is connected to the cover coupled to communicate with the fixing hole so that the cover is integrally fixed to the front of the case by the fastening means and the cover. It is characterized in that the heat generated from the motor is easily discharged to the outside by puncturing the space except for the coupling flange partially formed in the interior of the case to communicate with.

According to the present invention, the mounting bracket further includes a mounting bracket for easily carrying the body portion formed by the coupling of the case of the driving unit and the cover of the reduction unit, wherein the mounting bracket is formed in a plate shape capable of plastic deformation so that both ends are upright. Forming the bending plate so as to correspond to each other to position the body portion on the bottom surface of the mounting bracket located between the fixing plate and then through the fastening means to the fixing plate to fix the body portion and to cross the handle on the top of the fixing plate in the transverse direction Characterized in that configured to connect.

According to the present invention, a plurality of ventilation holes are formed in the fixed plate located at the front of the body portion mounted to the mounting bracket to be fixed to the reduction unit so that heat generated from the motor mounted inside the case can be discharged to the outside. It is done.

According to the invention, the electric gear and the reduction gear is characterized by consisting of a spur gear.

 According to the invention, the electric gear and the reduction gear is characterized by consisting of a bevel gear.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, in the drawings, the same components or parts are to be noted that the same reference numerals as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

1 is a partial cross-sectional view showing a brush motor applied to the concrete bubble removing vibrator according to the present invention, Figure 2 is a side view showing a brush motor applied to the concrete bubble removing vibrator according to the present invention, Figure 3 is a present invention 4 is a perspective view showing a concrete bubble removing vibrator according to the present invention, Figure 4 is an exploded perspective view showing a concrete bubble removing vibrator according to the present invention, Figure 5 is a side cross-sectional view showing a concrete bubble removing vibrator according to the present invention. Perspective view.

As shown in Figures 1 to 5, the concrete bubble removing vibrator of the present invention to increase the rotational force by reducing the rotational speed provided by the drive unit 110, the motor 112, and the drive unit 110 is built in It consists of a reduction unit 120 and the vibration cable 130 is installed in the reduction unit 120 to generate a vibration.

The driving unit 110 includes a motor 112 inside the case 111 in which one side inner space 111a is opened, and mounts the electric gear 113 on the rotation shaft of the motor 112.

In addition, the motor 112 is configured by using a permanent magnet as a stator by applying a DC brush motor and using a coil as a rotor, and by changing the direction of the current flowing through the rotor, As a motor that generates rotational force by repulsion and pulling, almost all DC brush motors use commutator and brush to change the direction of this current.

That is, as shown in FIG. 1 or FIG. 2, the DC brush motor fixes the permanent magnets 22 and 23 having arc-shaped cross sections to the inner circumferential wall of the cylindrical case 21 to fix the N pole. This creates magnetic flux through the alternating S and S poles.

The inner hollow portion of the permanent magnets 22 and 23 includes a rotor 25 wrapped with an armature coil 24 and a commutator 26 for applying power to the armature coil 24 from an external power line. It is stocked in 25).

The commutator 26 is made of copper or copper containing silver, and a high quality miter plate is used as the insulating material between the commutator pieces.

The disc-shaped sheet 27 installed orthogonally to the commutator is fastened to the outer circumferential surface of the commutator 26, and the brush-shaped brush holder 28 is integrally formed on the sheet 27 to form the brush 29 in the commutator 26. Resilient to the side is fastened to the bottom cover 30 is formed with a bearing groove (30a) in the center. Such a motor supplies power to the commutator 26 through the brush 29 electrically connected to an external power line, thereby rotating the rotor while current flows in the same direction in the armature coil 24.

The brush 29 generally uses a carbon brush made of carbon, which uses soft carbon crystals to increase durability by friction with the commutator 26.

In the DC motor having the above-described configuration, when an external power source is applied to the commutator 26 through the brush 29, the commutator 26 causes current to flow in the armature coil 24 of the armature in one direction, at which time the permanent magnet 22 Magnetic field is generated in the space between the magnetic pole surface of the permanent magnets 22 and 23 and the surface of the electric magnetic core due to the magnetic flux generated by the (23). Therefore, the current flowing to the armature coil installed in the air gap generates a rotational force on the rotor as a force acts on the charged particles as in Fleming's left hand law.

It is possible to generate a high torque in the concrete bubble removing vibrator 100 of the present invention through a DC brush motor configured and operated as described above, and thus has high efficiency and low noise. To improve efficiency.

In addition, the reduction unit 120 is coupled to the cover 121 to the end of the open inner space 111a of the case 111, the cover 121 is coupled to the coupling flange 121a which one side is opened to partition the inner space. ) Is formed so as to partially communicate the receiving space 121b for mounting the through-hole 121c and the reduction gear 122 to which the electric gear 113 is coupled to the front, and meshes the electric gear 113 and the reduction gear 122. By reducing the rotational speed of the driving force provided by the motor 112 by increasing the rotational force to output the increased or decreased rotational force to the driven shaft (122a) fixed in the center of the reduction gear (122).

In other words, as shown in the following equation, the rotational force, that is, the torque, increases with the deceleration of the rotational speed.

 P = T1 x N1 = T2 x N2

 P: power, T1, T2: torque (torque), N1, N2: speed

Here, T1 and N1 are rotational speeds and rotational forces output to the reduction gear 122, and T2 and N2 are rotational speeds and rotational forces passing through the final reduction gear 122.

As such, by reducing the rotation speed through the reduction gear 122, it is possible to output N2 < N1 values, and the electric force of the electric gear 113 corresponding to T1 and N1 is the reduction gear 122 corresponding to T2 and N2. It is possible to output the rotating force (torque) doubled to the driven shaft (122a) of.

As a result, the overload of the motor 112 can be prevented, and the portability of the vibrator 100 can be improved by applying the motor 112 having a small volume with a small capacity.

Here, the electric gear 113 and the reduction gear 122 is composed of a spur gear and / or bevel gear.

Further, the coupling of the cover of the drive unit 110 and the reduction unit 120 of the drive 110 is made as follows.

The fixing hole 111b is formed in the front edge portion of the inner space 111a of the case 111, and the coupling hole 121d passes through the fixing hole 111b so as to communicate with the fixing hole 111b. The cover 121 is integrally fixed to the front of the case 111, and the inner space 111a of the case 111 is drilled by drilling a space except for the coupling flange 121a formed partially inside the cover 121. The heat generated from the motor 112 can be easily discharged to the outside by being able to communicate with.

In addition, the vibration cable 130 is coupled to the coupling flange (121a) in front of the coupling shaft 131 so that the driven shaft (122a) is disposed in the center of the coupling 131 and then the free bendable cable 132 It is installed so as to connect with one side, the other side of the cable 132 is coupled to the vibration bar 133 so that the rotational force of the cable 132 can be converted into a repetitive vibration force.

As described above, the vibrator 100 is configured to maximize the portability of the vibrator 100 by separately installing the body portion (100a) consisting of the drive unit 110 and the reduction unit 120 to the mounting bracket 140. .

Here, the mounting bracket 140 is made of a plate shape capable of plastic deformation to form a fixing plate 142 bent to the upper end upright to correspond to each other and the bottom of the mounting bracket 140 located between the fixing plate 142 Position the body portion 100a on the surface 141 and then fasten the fastening means to the fixing plate 142 to fix the body portion 100a and cross the handle 143 on the upper portion of the fixing plate 142 in the transverse direction. By installing the connection so that the worker grasps the handle 143 to easily carry the mounting bracket 140 mounted with the body portion (100a).

In addition, a plurality of vent holes 142a are formed in the fixed plate 142 located at the front of the body portion 100a mounted on the mounting bracket 140 to which the reduction unit 120 is fixed, and then mounted inside the case 111. The heat generated from the motor 112 can be discharged to the outside.

This allows the perforation space of the cover 121, which is coupled to communicate with the internal space 111a of the case 111, to communicate with the vent hole 142a to facilitate external discharge of heat generated from the motor 112.

Looking at the operation of the present invention as follows.

First, when driving the motor 112 is supplied with external power, the driving force is output to the electric gear 113 coupled to the rotating shaft of the motor 112.

The electric gear 113 coupled to the through hole 121c of the cover 121 is engaged with the reduction gear 122 which is rotatably coupled to the coupling flange 121a of the cover 121 and the receiving space 121b. The rotational force of the motor 112 is transmitted to the reduction gear 122 side.

The reduction gear 122 provided with the rotational force of the electric gear 113 slows down the rotational speed (rpm) of the motor 112 and, conversely, improves the rotational force (torque).

As described above, the reduction gear 122 of the present invention transmits the rotational force doubled to the driven shaft 122a to the vibration cable 130 and penetrates the vibration rod 133 of the vibration cable 130 into the poured concrete. Large aggregates have less movement because the motion of aggregates (such as sand is called aggregate, and gravel like aggregates) is proportional to the vibration acceleration given and inversely proportional to the mass. The smaller the aggregate, the bigger the exercise.

The propagation process is caused by the high frequency vibration provided by the vibrator 100, but the vibration frequency hardly changes, whereas the amplitude causes a decrease by distance. The cement paste and fine aggregate are liquefied around the point where the vibration is applied, and the gap between the coarse aggregate is filled, and the upper part is pushed up to convert the voids into a closed room to densify the concrete mortar structure, thereby improving the strength of the concrete mortar after curing. Let's do it.

In addition, a high torque can be obtained even by applying a small output motor 112 to prevent overload of the motor 112 and a small volume motor 112 can be applied to the portability of the vibrator 100. Can be improved.

As described above, the concrete bubble removing vibrator of the present invention can output a stable frequency with a vibrating cable through the vibrator maximized the rotational force (torque) by the reducer to pass the alkali component of the concrete, water, air, etc. It is effective to improve the strength of concrete mortar after curing by converting it into a closed room.

In addition, the concrete bubble removing vibrator of the present invention has the effect of extending the life of the motor by preventing the overload of the motor by reducing the number of revolutions provided by the motor and at the same time double the rotational force.

In addition, the vibrator for removing concrete bubbles of the present invention has an effect of improving the portability of the vibrator by applying a small-sized motor capable of ensuring a high output by a reducer that reduces the rotational speed and doubles the rotational force. .

In addition, the concrete bubble removal vibrator of the present invention further includes a mounting bracket that allows the operator to grip and carry separately by mounting a body consisting of a combination of the drive unit and the reduction unit to maximize the portability of the vibrator concrete There is an effect that can smoothly perform the bubble removal operation.

Furthermore, the concrete bubble removing vibrator of the present invention effectively discharges the heat of the motor from the case in which the motor is built to minimize the heat accumulation, thereby extending the operating time and life of the motor and minimizing the internal damage of the motor. It works.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

Claims (6)

Built-in motor inside the case in which one side inner space is open, the drive unit is equipped with an electric gear on the rotating shaft of the motor, and the cover is coupled to the open inner space end of the case, The cover is provided in the motor by engaging the electric gear and the reduction gear to form a partial communication between the through-hole and the reduction gear to which the electric gear is coupled to the front of the coupling flange to define the inner space is opened on one side. Reduction unit for reducing the rotational speed of the driving force to increase or decrease the rotational force to output the increased or reduced rotational force to the driven shaft fixed to the center of the reduction gear, and coupling the coupling in front of the coupling flange to the driven shaft is the inner center of the coupling After installation, the cable can be freely bent and connected to one side, and the other side of the cable is coupled to the vibration rod to remove the concrete bubble consisting of a vibration cable to convert the rotational force of the cable into a repetitive vibration force In the vibrator for A fixing hole is formed at the front edge of the inner space of the case, and the coupling hole is connected to the cover coupled to communicate with the fixing hole so that the cover is integrally fixed to the front of the case by a fastening means and partially formed in the inside of the cover. Vibrator for removing concrete bubbles, characterized in that the heat generated from the motor to be easily discharged to the outside by puncturing the space except the coupling flange made to communicate with the inner space of the case. delete The method of claim 1, Further comprising a mounting bracket for easily carrying the body portion consisting of a combination of the case and the cover of the drive unit, The mounting bracket is formed of a plate shape capable of plastic deformation to form a fixed plate bent upright to both ends up to correspond to each other to position the body portion on the bottom surface of the mounting bracket located between the fixed plate and then through the fastening means to the fixed plate Vibrator for removing concrete bubbles, characterized in that configured to be fixed to the body portion and installed across the handle in the transverse direction on top of the fixing plate. The method of claim 3, wherein The fixed plate located in the front of the body portion mounted to the mounting bracket is fixed to the deceleration portion formed by forming a plurality of ventilation holes to remove the concrete bubbles, characterized in that configured to discharge the heat generated from the motor mounted inside the case to the outside For vibrator. delete delete

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