KR100852285B1 - A cutting defencing unit of flexible shaft in concrete vibrator - Google Patents

Abstract

A device for preventing the breakage of a flexible shaft of a concrete vibrator is provided to prevent the breakage of a flexible shaft by the vibration transferred from a rotary shaft. A device for preventing the breakage of a flexible shaft of a concrete vibrator comprises a power generation device(100) connected with an output of a motor to rotate correspondingly to the rotation of the motor and provided with a hose holder(110) fitted with an output jack of the motor, a power transmission device(200) transferring the power generated from the power generation device and composed of a bar-shaped flexible shaft(210) and a rubber hose(220) covering the outside of the flexible shaft, and a vibration transmission bar(300) composed of a first shaft joint, a second shaft joint, a rotary shaft connected by a breakage prevention rubber ring and a vibrator(310) coupled to the rotary shaft, wherein the breakage prevention rubber ring is installed between the second shaft joint and the flexible shaft to absorb the vibration transferred from the rotary shaft.

Description

A Cutting Defencing Unit of Flexible Shaft in Concrete Vibrator

The present invention relates to a breakage preventing device of a concrete vibrator flexible shaft, and in particular, by installing a rubber band for preventing breakage in the process of connecting the flexible shaft and the rotary shaft, the vibration according to the vibration shock of the rotary shaft in the process of rotating the flexible shaft The present invention relates to a breakdown preventing device of a concrete vibrator flexible shaft which prevents the flexible shaft from being broken by backing up the heat, torsion, compression and tensile stress of the flexible shaft.

In general, the process of constructing a building using concrete mortar at the construction site will be briefly described as follows.

First, in order to maintain sufficient strength according to the concrete mortar pouring, the various reinforcing rods are appropriately placed on the site of the concrete mortar, tied with thin wires, and then the formwork is wrapped around the formwork.

When the formwork is completed, cement, sand, and gravel of the proper ratio are mixed with water, and concrete mortar mixed evenly is mixed by the ready-mixed concrete vehicle and concrete mortar is poured into the formwork.

As described above, after the concrete mortar is poured between the molds and the mold is removed after a certain period of curing, the skeleton of the building is constructed.

However, before placing the concrete mortar carried by the ready-mixed concrete vehicle between the molds during the pouring work of the concrete mortar, there are numerous bubbles in the concrete mortar, and when it is cured without removing such bubbles, the bubble layer is formed in the concrete layer. Because of the remaining strength of the concrete is significantly lowered, there is a risk of collapse accident, and the surface of the concrete is not smooth and numerous bubble holes remain.

Therefore, when pouring concrete mortar must be removed bubbles, the equipment used is a concrete vibrator (vibrator).

The vibrator serves to make the concrete density uniform and dense so that the concrete density is uniform and dense by maintaining a bubble and an even layer in the mortar so that rapid vibration is applied to the mortar when the concrete mortar is poured.

However, such a conventional vibrator has the following problems.

First, due to the rotation of the rotary shaft fixed to the flexible cable hits the inner circumferential surface of the head cap to cause vibration, so the amount of vibration is small, the bubble removal efficiency contained in the mortar is reduced.

Second, since the flexible cable rotates in the hose part according to the driving of the power part, the life of the hose part is shortened by abrasion due to friction.

Third, the power unit and the vibrating rod are connected to the hose, so when one of the workers moves while holding the vibrating rod every time the casting position is changed during the pouring of concrete mortar, the other worker must move the power unit of the weight body. It was accompanied by inconvenience in use.

Fourth, if the hose portion is formed long to solve the above problems, there is a limit in transmitting power generated from the power unit to the vibration rod due to the twisting of the flexible cable, which is not feasible.

Accordingly, the present applicant has proposed a concrete vibrator hose heat and vibration prevention device to minimize the vibration and heat by the interaction of the wire damper and the pre-damper through Patent Registration No. 10-0679277 to solve the above problems.

However, referring to the conventional structure shown in FIGS. 1 and 2, the power generating unit 100 including the hose holder 110, the power transmission unit including the flexible shaft 210 and the rubber hose 220 ( 200, and a concrete vibrator consisting of a vibration transfer rod 300 including a vibrator 310 and a rotary shaft 320, such a concrete vibrator is a rotary vibrator is not 100% heat exchange due to its structure remaining in the rotary Backing up the shaft 320 acts as a thermal stress that is locally concentrated in the hydraulic crimping portion of the shaft joint 400, causing a problem of breakage of the flexible shaft 210.

That is, the rotary shaft 320 and the flexible shaft 210 are integrally connected (fastened by the shaft joint 400 and compressed by hydraulic pressure) so that all break stresses are hydraulically compressed from the rotary shaft 320 by the flexible shaft 210. Since the shear stress acting point (a) is designed to be transferred back up as it is, the breakage of the flexible shaft 210 occurs considerably at the connection point between the shaft joint 400 and the flexible shaft 210.

The present invention is to solve the above problems,

The object is to provide a structure for preventing breakage of the flexible shaft due to vibrations backed up from the rotary shaft.

As a means for achieving the above object,

The present invention is connected to the output terminal of the motor to rotate in accordance with the rotation of the motor, the power generating unit comprising a hose holder is inserted into the output projection of the motor; A power transmission unit having a function of transmitting power output from the power generation unit, the power transmission unit including a flexible shaft having a bar shape and a hose surrounding the flexible shaft, the flexible shaft being rotated according to the motor output; A vibration transmission rod including a rotary shaft and a vibrator that generate vibration while receiving power of the flexible shaft constituting the power transmission unit; A first shaft joint is coupled to the outer circumference of the rotary shaft, and a second shaft joint is inserted into the inner side of the first shaft joint and simultaneously coupled to the outer circumference of the flexible shaft. It is characterized in that the rubber ring for preventing damage is installed.

In addition, the flexible shaft end is characterized by consisting of a square pillar shape.

In addition, the break prevention rubber ring is characterized in that the inner side is the same square shape as the outer shape of the flexible shaft, the outer side is made of a circular or polygonal cylinder.

In addition, the tolerance between the hose inner diameter and the flexible shaft outer diameter is characterized in that 3.0mm.

As described above, the present invention combines the flexible shaft and the shaft joint by using the anti-break rubber ring, thereby providing an effect of preventing the flexible shaft from being damaged due to the backup vibration of the rotary shaft.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

3 is a block diagram of a concrete vibrator device of the present invention.

4 is an enlarged view of a portion B of FIG. 3;

5 is an enlarged view of the flexible shaft of the present invention;

The present invention largely consists of the power generating unit 100, the power transmission unit 200, and the vibration transmission rod (300).

The power generator 100 is connected to the output terminal of the motor to rotate in accordance with the rotation of the motor, and comprises a hose holder 110 is inserted into the output jack of the motor. For reference, since the motor and the jack for output is a general technology of the concrete vibrator device, illustration and detailed description thereof will be omitted.

The flexible shaft 210 to be joined to the motor may be manufactured in a rectangular shape or a hexagonal shape so that power can be transmitted by directly inserting the motor into the flexible shaft 210 without the need for a motor joint.

The power transmission unit 200 is a function of transmitting the power output from the power generating unit 100, the rubber hose surrounding the outside of the flexible shaft 210 and the flexible shaft 210 of the bar shape consisting of a predetermined length member And 220.

The vibration transmission rod 300 is connected to the first shaft joint 410, the second shaft joint 420, the rotary shaft 320 and the rotary shaft 320, which are connected through the rubber rings 500 to prevent breakage. It consists of a vibrator 310 that is integrally coupled.

In particular, the first shaft joint 410 is connected to the outer periphery of the rotary shaft 320, the second shaft joint 420 is coupled to the inside of the first shaft joint 410 and at the same time of the flexible shaft 210 It is coupled to the outer circumference. The flexible shaft 210 is slidingly coupled to the first shaft joint 410 and the second shaft joint 420 without being pressed. The first shaft joint 410 and the second shaft joint 420 are coupled to each other by screwing.

Accordingly, the rotation of the flexible shaft 210 causes the second shaft joint 420 to rotate, and the first shaft joint 410 engaged with the second shaft joint rotates, and the rotary shaft 320 engaged with the first shaft joint 410. By rotating), the vibrator 310 integrally with the rotary shaft rotates.

In addition, a break prevention rubber ring 500 is installed between the second shaft joint 420 and the flexible shaft 210.

The cut-resistant rubber ring 500 has an inner side of the same shape as the outer shape of the flexible shaft 210, the outer side is made of a circular or polygonal shape of the cylinder serves to absorb the vibration transmitted from the rotary shaft 320.

Hereinafter, the operation and effect of the present invention will be described in more detail.

The biggest difference between the present invention and the prior art is to delete all of the conventional shaft joint 400, which has been hydraulically compressed to the flexible shaft 210, and both ends (vibration transmission rod side, motor side) of the flexible shaft 210 4 Changed to each forged direct connection type to produce a four-pillar column, at the same time inserting a rubber material 500 for preventing damage to the four-corner pillar portion of the vibration transmission rod 300, vibration according to the vibration shock of the rotary shaft 320, Heat, torsion, compression and tensile stress of the wire is to block the breaking stress that is backed up riding the flexible shaft 210 riding the rotary shaft (320).

That is, the break prevention rubber ring 500 of the present invention blocks the break stress caused by vibration, thereby preventing the break of the flexible shaft 210, and the durability becomes much longer.

In particular, in the prior art, the rotary shaft 320 and the flexible shaft 210 are integrally connected to each other (fastened by the shaft joint 400 and hydraulically compressed) so that all the break stresses are hydraulically compressed from the rotary shaft 320 by the flexible shaft. The wire breakage occurred considerably because it was designed to be backed up to the stress point (a) of the shear.

However, the present invention eliminates the hydraulic crimping part, and the rotary shaft 320 and the flexible shaft 210 is designed in the middle of the universal type (structure in which the flexible shaft 210 can be freely moved in the axial direction). Since the shaft is not directly connected to the sliding coupling structure, even if the first vibration, heat, and other stresses cannot be backed up, and there are stresses passed through the first shaft joint 410 and the second shaft joint 420, Due to the blocking of the break prevention rubber ring 500 inserted into the quadrangular pillar of the flexible shaft 210, the flexible shaft 210 can be safely operated continuously without loss, and the durability is much better. .

In addition, when the flexible shaft 210 is pulled from the motor end, the conventional structure is integrally coupled through the shaft joint 400, but did not fall out, but the improved product is a structure in which the flexible shaft 210 is simply completely pulled out (separately) Stopper), and the exchangeability of the flexible shaft 210 is easily ensured.

Thus, when inserting the flexible shaft 210 into the drive motor or engine, the pull shaft is pulled out more easily than before, and then inserted into the motor or the engine, and then moved to the front by the thrust. It is inserted into the second shaft joint 420 to perform a normal vibration rod function.

Another feature is that the maximum tolerance (when the shaft is attached to one side wall) between the inner diameter of the rubber hose 220 and the outer diameter of the flexible shaft 210 is 6.0 mm, so that the flexible shaft 210 is based on the center line of the hose. Due to the large rotation radius, when the flexible shaft 210 rotates, the rotation torque is so large that the rubber hose 220 quickly returns to the inner wall of the inner wall of the rubber hose 220 so that the rubber hose 220 runs at a high speed. And loss occurs, causing heat generation acceleration, torsional moment weighting, abrasion promotion, durability deterioration, and the like, and in particular, these heats have contributed to the problem of breaking the flexible shaft 210 which is a problem of the prior art. do.

Therefore, the present invention reduces the tolerance (t1) between the inner diameter of the rubber hose 220 and the outer diameter of the flexible shaft 210 from conventional 6.0mm to 3.0mm in order to solve the rotation problem of the rubber hose 220, the rubber hose 220 Since the outer radius of the flexible shaft 210 decreases as the rotation radius of the flexible shaft 210 decreases at the center line of the flexible shaft 210, the centrifugal rotational force that rotates while hitting the steel plate of the inner wall of the rubber hose 220 decreases. As the problem was solved to rotate as the rubber hose 220 is to be followed to go back.

Eventually, due to the design to be rotated in the flexible shaft 210 (flexible shaft 210 does not flow while drawing a parabolic, almost rotated in the mid-island) this problem is solved by unnecessary rotation of the rubber hose 220 In addition, problems such as heat generation, early wear, and reduced durability are solved at the same time.

In addition, the flexible shaft 210 does not rotate while drawing a parabolic, but at the center line, the heat generated when the steel hose in the inner diameter of the rubber hose 220 is strongly pressed and rotated is considerably reduced, so that the worker grasps the hose and is comfortable. Workability is that much easier.

In addition, the motor side also forcibly snaps the hexagonal pillar to the flexible shaft 210 by hydraulic compression to form an integral type, and the hexagonal pillar portion is inserted into the motor or the engine, but the present technology is forged in the flexible shaft 210 itself. The quadrangular pillars are directly inserted into the motor or the engine to smoothly transmit power, thereby solving the problem of breaking the flexible shaft 210 of this part, which is a problem due to the conventional hydraulic crimping.

In addition, while the prior art has a lot of loss of unnecessary heat generation, etc., the present invention provides a significantly reduced work process, a very simple structure, and maintainability is much superior to the prior art.

1 is a block diagram of a conventional concrete vibrator device.

FIG. 2 is an enlarged view of portion A of FIG. 1; FIG.

3 is a block diagram of a concrete vibrator device of the present invention.

4 is an enlarged view of a portion B of FIG. 3;

5 is an enlarged view of the flexible shaft of the present invention.

Explanation of symbols on the main parts of the drawings

100: power generating unit

110: hose holder

200: power transmission unit

210: flexible shaft

220: rubber hose

300: vibration transfer rod

310: vibrator

320: rotary shaft

400: shaft joint

410: first shaft joint

420: second shaft joint

500: Rubber band for preventing damage

Claims (4)

A power generator 100 connected to an output end of the motor and rotating in correspondence with the rotation of the motor, the hose generator 110 including an output protrusion of the motor inserted therein; The function of transmitting the power output from the power generating unit 100, consisting of a predetermined length of the material to rotate in response to the motor output of the flexible shaft 210 and the rubber hose 200 surrounding the flexible shaft A power transmission unit 200 comprising a; A vibration transmission rod 300 including a rotary shaft 320 and a vibrator 310 that generate vibration while receiving power from the flexible shaft 210 constituting the power transmission unit 200; A first shaft joint 410 is coupled to the outer circumference of the rotary shaft 320, the second shaft is inserted into the first shaft joint 410 and coupled to the outer circumference of the flexible shaft 210. The joint 420 is installed, and the break prevention device of the concrete vibrator flexible shaft, characterized in that the damage prevention rubber ring 500 is installed between the second shaft joint 420 and the flexible shaft 210. The method of claim 1, End of the flexible shaft 210 is a break prevention device of the concrete vibrator flexible shaft, characterized in that formed in the form of a square pillar. The method of claim 1, The break prevention rubber ring 500 is the inside of the same as the outer shape of the flexible shaft, the outside of the damage prevention device of the concrete vibrator flexible shaft, characterized in that made of a circular or polygonal cylinder. The method of claim 1, Tolerance prevention device of the concrete vibrator flexible shaft, characterized in that the tolerance (t1) between the inner diameter of the rubber hose 220 and the outer diameter of the flexible shaft 210 is 3.0mm.

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