JP2997711B2 - Liquid type auto balance device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid autobalance apparatus for automatically correcting imbalance of a rotating body such as a grindstone using a liquid.

[Prior Art] Conventionally, in order to automatically correct imbalance of a rotating body such as a grindstone, a liquid ejecting nozzle and an air ejecting nozzle respectively connected to a pressure pump are provided in pockets arranged around an axis of the rotating body. There has been proposed a liquid type auto-balancing device which is disposed to face the liquid type auto-balance device. Then, the liquid ejected by the pressurized air from the liquid ejecting nozzle is selectively injected into a plurality of pockets, or the pressurized air is ejected from the air ejecting nozzle to forcibly eject the liquid injected into the pocket to the outside. It was ejected and the imbalance of the whetstone was corrected automatically.

[Problems to be Solved by the Invention] However, not all the liquid ejected from the liquid ejecting nozzle is injected into the pocket, and some liquid is blown out of the pocket. Also, the liquid is blown out of the pocket to the outside by the air injected from the air injection nozzle. These results cause the liquid to partially adhere to the side surface of the grindstone. Therefore, the balance of the grindstone is broken by the liquid attached to the side surface of the grindstone. Since the liquid is blown off by the centrifugal force of the grindstone, the unbalance position moves or the amount of unbalance fluctuates, so that it is difficult to correct the imbalance of the grindstone, and there is a problem that the correction takes a lot of time.

An object of the present invention is to provide a liquid-type auto-balancing device that can prevent a liquid from adhering to a side surface of a rotating body and disintegration of the rotating body, and can perform balance correction of the rotating body in a short time. It is in.

Means for Solving the Problems In order to achieve the above object, the present invention corrects the rotational imbalance by injecting liquid into a plurality of pockets arranged around an axis of a rotating body. In a liquid type auto balance device, a liquid ejecting unit for injecting liquid into a pocket of a specific phase to correct imbalance of a rotating body, and ejecting air toward the pocket to discharge the liquid in the pocket to the outside. And a suction unit for forcibly sucking the liquid discharged from the pocket to the outside.

[Operation] With the above configuration, the liquid ejected from the liquid ejecting unit is injected into the pocket of a specific phase, or the liquid injected into the pocket is blown out by the air ejected from the air ejecting unit, thereby rotating the rotating body. Fix the imbalance of
The suction unit forcibly sucks the overflowing liquid without being injected into the pocket or forcibly sucks the liquid blown out of the pocket by air.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the grinding wheel head 1 in the grinding machine
A holder 3 is fastened and fixed to the main shaft 2 by a nut 4. A balance ring 6 is attached and fixed to the holder 3 with screws 5. A grindstone 7 as a rotating body is sandwiched and fixed between the balance ring 6 and the holder 3.

The balance ring 6 includes a ring body 6a and a ring body 6a.
And a lid ring 6b attached to the front surface of the cover. A plurality of (in the illustrated example, 24) pockets 8 are arranged at equal intervals on the front surface of the ring main body 6a in a ring, and the lid ring 6b covering all the pockets 8 is attached by screws 9. I have.

The inside opening of each pocket 8 not covered by the lid ring 6b serves as an inlet 10. Further, in the plurality of screw holes 11 arranged in a ring at the position inside the inlet 10, an appropriate number of balance peaks 12 for performing preliminary manual balancing can be selectively screwed. I have.

The grinding wheel head 1 is provided with a grinding wheel cover 13 so as to cover the grinding wheel 7 from above. As shown in FIGS. 1 and 4, a mounting hole 14 is provided substantially at the center of the front surface of the grinding wheel cover 13, and a horizontal elongated hole 15 is provided at an upper portion thereof.

The injector device 16 is located inside the grindstone cover 13.
Are arranged facing each other in a state close to the injection port 10 of the balance ring 6. That is, the injector device 16 is provided with the mounting member 17 in which a male screw is engraved. The mounting member 17 is inserted through the mounting hole 14 of the grindstone cover 13 and is mounted and fixed to the cover 13 by a pair of nuts 18 screwed into the mounting member 17.

As shown in FIG. 3, the injector device 16 is provided with a liquid injection nozzle 19, an air injection nozzle 20, and a suction hole 21 in an arc shape so as to face the injection port 10, and in this embodiment, in order from the left side. The liquid ejection nozzle 19, the air ejection nozzle 20, and the suction hole 21 are provided.

The liquid injection nozzle 19 and the air injection nozzle 20 use an electromagnetic fuel injector for a gasoline engine having a built-in electromagnetic coil and a needle valve which is opened and closed by the electromagnetic coil. It is also possible to use an ultrasonic injector of the type that opens and closes the injection valve by enlarging.

The liquid injection nozzle 19 is connected to a gas-liquid supply tank 23 by a liquid supply pipe 22, and the air injection nozzle 20 is connected to the gas-liquid supply tank 23 by an air supply pipe 24.
The gas-liquid supply tank 23 has a hermetically sealed structure, in which a liquid L such as clean water or grinding fluid is stored, and the liquid L is compressed at a predetermined pressure by pressurized air A from an air source (not shown). I can do it. The suction hole 21 is a suction tube.
25 is connected to a vacuum pump 26 via
The liquid L is sucked by the suction force.

Next, the operation and effects of the liquid type auto-balancing device configured as described above will be described.

As shown in FIG. 5, when starting the balance operation, the air injection nozzle 20 is opened by a command from a control device (not shown) while the grindstone 7 is rotating, and pressurized air A is injected from the air injection nozzle 20 into the injection port. The liquid L, chips, and the like remaining in the pocket 8 are discharged to the outside by the pressure by being injected into all the pockets 8 through 10. Then, the liquid L, chips and the like are forcibly sucked through the suction holes 21 of the injector device 16.

As a result, the balancing operation can be performed accurately without any residue in the pocket 8. Further, since the liquid L is forcibly sucked by the suction hole 21, the liquid L blown out to the outside can be prevented from adhering to the inner surface of the grindstone cover 13, the side surface of the grindstone 7, and the like. Therefore, the balance of the grindstone 7 is not lost due to the adhesion of the liquid L, and stable rotation can be maintained.

On the other hand, during the balance operation, the liquid injection nozzle 19 is opened by a command from the control device, and the liquid injection nozzle 19 is opened.
The liquid L is injected into the specific pocket 8 through the injection port 10 and is held in the pocket 8 by centrifugal force accompanying the rotation of the grindstone 7. As a result, a predetermined amount of mass acts on a specific phase of the grindstone 7, whereby the imbalance of the grindstone 7 is automatically corrected.

Further, the liquid L ejected from the liquid ejecting nozzle 19 is not always injected into the pocket 8 through the injection port 10, and may slightly overflow outside. At this time, the liquid L overflowing to the outside is forcibly sucked into the suction hole 21 by the suction force of the vacuum pump 26. As a result, since the liquid L does not adhere to the side surface of the grindstone 7, the occurrence of imbalance of the grindstone 7 can be prevented, and stable rotation can be maintained.

Furthermore, after using the grinder, the pressurized air A is jetted from the air jet nozzle to blow off the liquid L in the pocket 8 to the outside, and the liquid L is sucked through the suction hole 21 to stop the rotation of the grindstone 7. After that, it is possible to prevent the liquid L in the pocket 8 from flowing out and attaching to the side surface of the grindstone 7. Therefore, when the work is performed while the grindstone 7 is rotated again, no imbalance occurs due to the mass of the liquid L, so that the balance of the grindstone can be corrected in a short time.

Further, since the injector device 16 can be moved by loosening the nut 18 screwed to the mounting member 17, the interval between the injector device 16 and the injection port 10 can be easily adjusted.

It should be noted that the present invention is not limited to the above-described embodiment, and can be modified as follows without departing from the spirit of the present invention.

(1) In the present embodiment, the liquid injection nozzle 19 and the air injection nozzle 20 are provided separately from each other.
Switching between the air supply pipe 22 and the air supply pipe 24 is controlled by a switching valve, and the pressurized air A and the liquid L can be injected into the pocket 8 by one injection nozzle.

[Effects of the Invention] As described above in detail, according to the present invention, it is possible to reliably prevent the liquid from adhering to the side surface of the rotating body and to break the balance of the rotating body, and to correct the balance of the rotating body from the related art. There is an effect that it can be performed in a shorter time.

[Brief description of the drawings]

FIG. 1 is a partially enlarged sectional view showing a state in which a liquid type auto-balancing device is mounted on a grindstone cover of a grinding machine, FIG. 2 is a partial front view showing a configuration of a balance ring, and FIG. FIG. 4 is a front view showing a state in which a liquid type auto-balancing device is mounted on a grindstone cover, and FIG. 5 is a view showing a state in which a liquid in a pocket is sucked by a suction unit. FIG. 7: grinding wheel as rotating body, 8: pocket, 19: liquid jet nozzle, 20: air jet nozzle, 21: suction unit,
A: air, L: liquid.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-83675 (JP, A) JP-A-54-54389 (JP, A) JP-A-64-40268 (JP, A) JP-A-58-58 160058 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01M 1/00-1/38

Claims (1)

(57) [Claims] 1. A liquid autobalance for injecting a liquid (L) into a plurality of pockets (8) arranged around an axis of a rotating body (7) to correct imbalance of the rotating body (7). In the apparatus, a liquid ejecting unit (19) for injecting a liquid (L) into a pocket (8) having a specific phase to correct imbalance of the rotating body (7); and an air ( A) to eject the liquid (L) in the pocket (8) to the outside by injecting the liquid (A), and forcibly apply the liquid (L) discharged to the outside from the pocket (8). And a suction unit (21) for suctioning.