JPS63111344A - Method of controlling shift of vehicle automatic transmission - Google Patents

Abstract

PURPOSE:To aim at making a balance correcting device compact, by engaging movable weights threadely with a pair of feed screws which are arranged orthogonal to each other in a casing member, and by associating the feed screws with motors through the intermediary of speed reduction devices. CONSTITUTION:A pair of movable weights 11, 12 for correcting unbalance between a grindstone 5 and a spindle 6 are disposed in a main body casing 2. Feed screws 18, 19 are rotatably supported by bearings 20 on the lower side of one end part of the movable weights 11, 12. The feed screws 18, 19 are associated with motors 27, 28 through the intermediary of reduction devices. Accordingly, it is possible to constitute a mechanism for driving movable weights with a less number of parts.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a device for correcting unbalance of a rotating body such as a grinding wheel.

(Prior Art) In general, in grinding machines, vibrations that adversely affect grinding hardness occur due to various factors such as unbalance of the grinding wheel or the main shaft. The position was manually adjusted to remove the vibration.

(Problem to be solved by the invention) However, according to this method, in order to obtain a satisfactory result, not only is it troublesome to repeat manual adjustment work multiple times, but also the rotation of the grindstone must be stopped for each work. There was a waste of time in having to do so. Therefore, in order to make the work easier, a device is required to automatically adjust and control each balance piece on the grinding wheel, but in this case, the device has a mechanism including a drive means for driving the balance piece. In order to install this in the limited space of a grindstone that rotates at high speed, a new problem arises in that the entire device must be made lightweight and compact.

Structure of the Invention (Means for Solving the Problems) The present invention has been made by paying attention to the above-mentioned problems. A movable weight was screwed into each, and the feed screw was interlocked with a motor via a speed reduction device.

Further, in addition to the configuration of the first invention, the second invention further includes at least one balance piece provided on the outer periphery of the case member so that the position thereof can be adjusted.

(Function) According to the first invention, the movement of the pair of movable weights is automatically controlled as the motor rotates, and the unbalance can be easily corrected and removed while the rotating body is rotating. The mechanism for driving the weight can be easily constructed with a small number of parts, making the entire device lightweight and compact.

Further, according to the second invention, the unbalance of the rotating body is corrected internally by changing the position of the balance piece located 620 degrees around the outer circumference of the case member, and subsequently, each of the pair of movable weights is automatically adjusted. By controlling the movement, the unbalance of the rotating body can be corrected with high precision.

(Example) Hereinafter, an example in which the present invention is embodied in a balance correction device for a grinding wheel will be described based on the drawings.

As shown in FIGS. 1 and 2, the case member 1 of the balance correction device includes a circular bowl-shaped main body case 2, and the main body case 2.
It consists of a lid 3 that covers the open surface of the holder. The main body case 2 is attached to the front surface of a flange 7 for attaching the grinding wheel 5 to the main shaft 6 of the grinding machine via a plurality of screws 4, so that the case member 1 is integrated with the grinding wheel 5 as the main shaft 6 rotates. It is designed to be rotated. A plurality of balance pieces 9 are accommodated in an annular groove 8 formed on the outer periphery of the main body case 2 so that their positions can be adjusted by operating setscrews 10 .

A pair of movable weights 11 and 12 for correcting the imbalance between the grindstone 5 and the main shaft 6 are formed of metal plates into a rectangular shape, and are disposed overlappingly in the center of the main body case 2 so as to be orthogonal to each other.

A pair of slide leg pieces 14.15 fixed to the back surface of both ends of each movable weight 11.12 are slidably fitted into guide grooves 13 formed on the bottom surface of the main body case 2.
Each of the movable weights 11 and 12 is capable of reciprocating in a plane parallel to the grinding wheel 5 in directions perpendicular to each other. Note that one end of each movable weight 11, 12 is prevented from steadying by a pair of regulating pieces 41 arranged and fixed on both sides thereof.

Further, a recess 16.17 having a length corresponding to the movement range of the movable weight 11.12 is formed in each joint surface of both movable weights 11.12.

On the lower side of one end of each movable weight 11.12, the main body case 2 has a movable weight of 1°1. A feed dog 18, 19 extending in the moving direction of the gear 12 is rotatably supported at both ends thereof by a pair of inner and outer bearings 20. Each of the feed screws 18 and 19 is screwed into a screw hole 21 formed in the negative slide leg piece 14, and as the feed screws 18 and 19 rotate forward and backward, each of the movable weights 11 and 12 is moved separately. Moved back and forth.

A drive shaft 23.24 is rotatably supported in the main body case 2 via a pair of bearing plates 22 so as to extend orthogonally to each feed screw 18.
．． A first worm 26 that meshes with a first worm wheel 25 attached to the outer end of the worm 19 is fixed. The combination of the first worm wheel 25 and the first worm 26 allows the rotation of each drive shaft 23, 24 to be controlled by each feed screw 18, 1.
9.

The main body case 2 has a small DC motor 2 capable of forward and reverse rotation at an inner position corresponding to one end of each drive shaft 23,24.
7 and 28 are installed parallel to the moving direction of the movable weights 11 and 12, and a motor shaft 29 has a second worm wheel 30 that meshes with a second worm wheel 30 attached to one end of the drive shaft 23 and 24. 2 worms 31 are fixed.

In this embodiment, the feed screws 18, 19, the drive shaft 23,
24, a motor shaft 29, worm wheels 25 and 30, and worms 26 and 31 constitute a speed reduction device.

Then, each motor 27, 28 is started at a predetermined rotation speed based on a signal from a balance detection and display device (to be described later), so that the drive shaft 23° 24, the first worm wheel 25, the first worm 26, and the feed screw Each of the movable weights 11, 12 is separately driven by a predetermined movement amount via 18, 19.

In addition, the main body case 2 is provided with a limit switch 3 for detecting the movement limit position of one of the movable weights 11 and 12.
7.38 are fixedly arranged, and each movable weight 1
A limit switch 39.4 is provided on the side surface of the slide leg piece 15 of 1.12 for detecting the other movement limit position of the movable weight 11.12 by contact with another movable weight.
0 is attached. Moreover, three concentric slip rings 32 connected to each of the motors 27 and 28 are provided on the front surface of the central portion of the lid 3 of the case member 1. A switch member 34 is attached to the outer surface of the protective cover 33 of the grinding wheel 5 at a position corresponding to this slip ring 32, and by sliding the knob 36 (movement in the left-right direction in FIG. 2) and rotating it, three movable contact 35
By contacting and disengaging each slip ring 32, the supply of power to each of the motors 27 and 28 can be switched.

Next, a system and method for correcting the imbalance between the grindstone 5 and the main shaft 6 using the balance correction device configured as described above will be described.

As shown in FIG. 3, the balance correction device 51 is attached to the main shaft 6 of the grinding machine 48 together with the grindstone 5. An origin detection sensor 53 for detecting the origin position of the grinding wheel 5 is connected to the main shaft 6.
Built into the rotating system. A vibration detection sensor 55 consisting of an acceleration pickup or the like for detecting vibrations caused by an imbalance between the grinding wheel 5 and the main shaft 6 is attached to a suitable position of the grinding wheel head 56 of the grinding machine 48 or the like.

The balance detection display device 57 used together with the balance correction device 51 includes a digital display section 58 for digitally displaying the maximum amount of runout of the grinding wheel 5, and a 10 degree display section 58 for displaying the unbalance position corresponding to the maximum amount of runout. 36 index position indicators 59 arranged in a ring shape at an angle of . The balance detection display device 57 also includes a mode changeover switch 60 for selecting whether to control the pair of motors 27 and 28 installed in the balance correction device 51 manually or automatically; And when the manual control mode is selected by this switch 60, the pair of motors 27 and 28
A pair of push switches 6 for driving each separately.
1.

When the main shaft 6 is first rotated during the balance correction work, as shown in FIG. The origin position of the grinding wheel 5 is detected based on the vibration detection sensor 55, and the runout amount is calculated for each of the 36 index positions based on the origin position based on the signal from the vibration detection sensor 55, and the data is stored in the RAM 63. 0 then,
In order to specify the unbalance vector of the grinding wheel 5 and the main spindle 6, the CPU 62 selects the maximum runout amount from the collected runout amount data, selects the index position corresponding to the maximum runout amount, and calculates the maximum runout amount. This is displayed on the digital display section 58, and the indexed position indicator 59 at the position where the maximum imbalance occurs is displayed by lighting.

Next, the operator temporarily stops the rotation of the main shaft 6, moves and adjusts each balance piece 9 of the balance correction device 51 appropriately by hand in accordance with the above-mentioned displays, and moves the grindstone 5 and the main shaft 6.
Preliminarily correct the imbalance. Subsequently, when the main shaft 6 is restarted, the unbalance vector after preliminary correction is specified on the digital display section 58 and the index position display 59 in the same manner as described above. Here, when the manual control mode is selected by the mode changeover switch 60, each motor 2 is operated in response to the operation of each press switch 61.
7.28 is driven at a predetermined rotation speed, and the drive shaft 23
, 24, first worm 26, first worm wheel 25
and each movable weight 1 via the feed dog 18, 19.
1.12 are each moved separately. As a result, a correction vector for canceling the unbalance vector acts on the grindstone 5, and the imbalance between the grindstone 5 and the main shaft 6 is accurately eliminated. At this time, the operator simply checks each display on the pre-tal display section 58 and the index position display section 59 and operates the press switch 61 for the required time, and then
Balance correction work can be done quickly and accurately without stopping the rotation of the machine.

In addition, in this embodiment, drive shafts 23.24 are disposed perpendicularly to the feed screws 18.19, and each drive shaft 23.
．． Since the motor shaft 29, the worm wheel 25.30, and the worm 26.31 arranged perpendicularly to the motor shaft 24 constitute a speed reduction device, the movable weight 11 is
．． 12 can be prevented from shifting from the adjusted position.

On the other hand, when the automatic control mode is selected by the mode changeover switch 60, the CPU 62 generates a correction vector for canceling the unbalance vector of the grinding wheel 5 based on the maximum runout amount data and the corresponding index position data. The signal is converted into a signal, and each motor 27 is controlled by the signal.
．． 28. Therefore, in this automatic control mode, all steps in the balance correction work of the grindstone 5 can be automated and can be performed quickly and accurately.

Note that the balance correction device, balance correction method, and system of the present invention are not only applicable to the above-mentioned grinding wheel, but can also be applied to balance correction of various rotating bodies.

Effects of the Invention As detailed above, according to the first invention, each of the pair of movable weights is automatically controlled to move as the motor rotates, and the unbalance of the rotating body can be quickly and easily corrected. In addition to being able to accurately correct and remove the movable weight, the mechanism for driving the movable weight can be easily configured with a small number of parts, and the entire device can be made lightweight and compact.

Further, according to the second invention, at least one
Since two balance pieces are provided so that their positions can be adjusted, the first
In addition to the effects of the invention, there is an effect that the unbalance of the rotating body can be corrected with high precision.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the inside of a grinding wheel balance correcting device embodying the present invention with the lid removed, Fig. 2 is a sectional view showing the grinding wheel balance correcting device attached to the grinding wheel, and Fig. 3 is a front view showing the inside of the grinding wheel balance correcting device embodying the present invention. FIG. 4 is a schematic diagram showing a balance correction system for a grinding machine that combines a balance correction device and a balance detection display device. FIG. 4 is a block diagram showing an electric control circuit of the balance correction system of FIG. 3. A case member 1, a grindstone 5 as a rotating body, a main shaft 6, a balance piece 9, a movable weight 11, a feed screw 18, 19 that constitutes a 12.2ffl speed device, and a drive shaft 23, 2.
4. Same worm wheel 25° 30, same (worms 26, 31, motor shaft 29, motors 27, 28, balance correction device 51, balance detection display device 57°

Claims (1)

[Claims] 1. The movable weights (11, 12) are respectively screwed into a pair of feed screws (18, 19) installed in the case member (1) in directions intersecting with each other; The feed screws (18, 19) are connected to the motor (27) via the reduction gear.
, 28). 2. The speed reducer has a drive shaft (23, 24) arranged to intersect with each feed screw (18, 19), and a motor (also arranged to intersect with each drive shaft (23, 24)). 2
7, 28), each of the feed screws (18, 19) and the drive shaft (23, 24) and the drive shaft (23, 24) and the motor shaft (29) are each connected to a worm. Wheels (25, 30) and worms (26, 3)
1. A rotating body balance correction device according to claim 1, wherein the speed is reduced by each of the combinations of 1). 3. The drive shaft (23, 24) is located at the shaft end of the feed screw (18, 19), and the motor shaft (29) is located at the shaft end of the feed screw (18, 19).
2. The rotating body balance correction device according to claim 1, wherein the shaft ends of the shafts 8 and 19) are arranged perpendicularly to each other, and the three shafts as a whole form a U-shape. 4. The rotating body balance correction device according to claim 1, wherein the feed screws (18, 19) are perpendicular to each other at the center of the case member (1). 5. Screw the movable weights (11, 12) respectively to a pair of feed screws (18, 19) installed in the case member (1) in directions intersecting with each other, and ) is connected to the motor (27
, 28), at least one balance piece (9) is provided on the outer periphery of the case member (1) so that its position can be adjusted.