JP3298245B2 - Bearing structure of electric motor for glass sheet processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing structure for an electric motor used in a glass sheet processing apparatus for grinding and polishing a glass sheet.

[0002]

2. Description of the Related Art In general, as a bearing for holding a shaft that rotates and slides in an axial direction, a slide bearing or a stroke bearing whose rolling element is a ball is used.

[0003]

If the rolling element receiving the load is a ball, the ball comes into point contact with the inner ring or the outer ring. As a result, the allowable load is small, and the inner or outer ring with which the ball is in rolling contact. May easily cause abrasion scratches on the rolling surface of the bearing, which may cause damage to the bearing.

[0004] The present invention has been made in view of the above-mentioned points, and an object of the present invention is to increase the allowable load and reduce the occurrence of abrasions on the rolling surface. An object of the present invention is to provide a bearing structure of an electric motor used in a glass sheet processing apparatus in which the possibility of bearing damage is small.

[0005]

SUMMARY OF THE INVENTION According to the present invention, the object is to fix a case and a case fixed to the case within the case.
And the stator is free to rotate with respect to this stator.
The rotor arranged inside the case and this rotor
Rotor with a grinding wheel attached to the tip
Of an electric motor for a glass sheet processing apparatus having a shaft
A bearing structure, which is achieved by a bearing structure of an electric motor for a glass sheet processing apparatus, which holds a rotor shaft rotatably and slidably in an axial direction.

An electric motor for a glass sheet processing apparatus according to the present invention.
One example of the bearing structure of
The rotor of the motor is attached and a grindstone is
Bearing that holds the attached rotor shaft rotatably
Is composed of needle bearings.
The needle roller can be relatively slid in the axial direction.
In another example, the rolling surface of the needle roller on the outer ring of the needle bearing and the rolling surface of the needle roller on the inner ring of the needle bearing form a space in which the needle roller can slide in the axial direction. Has formed. In the present invention, the needle roller may be slidable in the axial direction with respect to one of the outer ring and the inner ring, or the needle roller may be slidable in the axial direction with respect to both. In yet another embodiment of the present invention, the rotor shaft is biased to the air resiliently axially.

[0007]

[Action] rotor shaft of the electric motor according to the present invention,
Preferably, it is rotatably and axially slidably supported by a needle bearing. During rotation and axial movement of the rotor shaft, the needle rollers in the needle bearing make line contact with members supporting the needle rollers, for example, the outer and inner rings of the needle bearing.

Next, the present invention will be described in more detail based on preferred embodiments shown in the drawings. The present invention is not limited to these specific examples.

[0009]

1 and 2, a glass plate processing apparatus 1 of the present embodiment includes a transfer device 3 for transferring a glass plate 2 in a direction perpendicular to the plane of the drawing and a lower end of the glass plate 2 transferred by the transfer device 3. And a grinding head 4 for performing chamfer grinding.

The conveying device 3 has a pair of endless belts 11 and 12 arranged opposite to each other, and the endless belts 11 and 12 are hung and connected to a driving source, respectively, and the endless belts 11 and 12 run by their rotation. Support frames 17 and 18 for supporting driving drums 13 and 14 (a driven drum is not shown) and pressing plates 15 and 16 for pressing portions of endless belts 11 and 12 sandwiching the glass plate 2 from behind.
And a slider device 19 for moving the support frame 18 in the direction A in order to obtain a proper holding of the glass plate 2. Fixed support frame 17 and slider device 19
Are supported by the base frame 20. Since such a transport device 3 is known, a detailed description thereof will be omitted.

The grinding head 4 has an electric motor 31, a grinding wheel 33 attached to the tip of a rotor shaft 32 of the electric motor 31, and an electric motor 31 mounted thereon. A slider 34 for adjusting the position, and a piston rod 36 abutting on a sphere 35 partially rotatably embedded at the rear end of the rotor shaft 32.
And an air cylinder device 37 having By turning the knob 42 of the slider 34 supported on the base frame 20 via the support member 41, the electric motor 31 can be moved in the axial direction B, whereby the grinding wheel 33 moves with respect to the lower end of the glass plate 2. The cutting amount of the annular whetstone 45 can be set. The air cylinder device 37 connected to and attached to the base of the electric motor 31 via the support member 46 causes the rotor shaft 32 to move in the axial direction B via the piston rod 36 and the sphere 35 by the high-pressure air supplied thereto. Aeroelastic,
In other words, it is supported as an air float.

[0012] electric motor 31, as shown in detail in FIG. 2, a stator 52 fixed to the case 51, the stator 52
Is arranged in the case 51 so as to be rotatable with respect to
And a rotor 53 mounted in the stator 52, a rotor shaft 32 to which the rotor 53 is attached, and one end of the rotor shaft (motor spindle) 32 rotatably and relatively to the case 51. And the other end of the rotor shaft 32 is slidably rotatable relative to the case 51 in the axial direction B. And a thrust bearing device 56 for holding the rotor shaft 32 so as to be rotatable with respect to the case 51 and relatively movable in the axial direction B. Is provided. 57 is an oil seal, 58 is a cooling fan attached to the rotor shaft 32, and 59 is a rear cover.

The needle bearing 54 includes an inner ring 61 fixed to the outer peripheral surface of the rotor shaft 32 and a cylindrical member 62.
Outer ring 63 fixed to the inner peripheral surface of the inner ring, inner ring 61 and outer ring 6
3, a plurality of needle rollers 64 rotatably and slidably disposed in the axial direction B. In this example, the needle rollers 6 in each of the inner ring 61 and the outer ring 63 are provided.
The rolling surfaces 65 and 66 of 4 form a space 67 in which the needle roller 64 can slide in the axial direction B. In this example, the needle rollers 64 are slidably disposed in the annular space 67 in both the inner ring 61 and the outer ring 63 in the axial direction B.
Alternatively, it may be arranged slidably in the axial direction B only with respect to the outer ring 63. The cylindrical member 62 is supported and fixed to the case 51 via a support member 68.

The needle bearing 55 is formed substantially in the same manner as the needle bearing 54, and includes an inner ring 71 fixed to the outer peripheral surface of the rotor shaft 32, and a cylindrical member 72.
Outer ring 73 fixed to the inner peripheral surface of the inner ring 71, inner ring 71 and outer ring 7
3 and a large number of needle rollers 74 arranged rotatably and slidably in the axial direction B. The rolling surfaces 75 and 76 of the needle rollers 74 in the inner ring 71 and the outer ring 73, respectively, are provided. The needle roller 74 forms an annular space 77 in which the needle roller 74 can slide in the axial direction B. In the needle bearing 55 as well, the needle roller 74 is slidably disposed in the axial direction B with respect to both the inner ring 71 and the outer ring 73, but instead of this, only the inner ring 71 or the outer ring 73 It may be arranged slidably only in the axial direction B. The cylindrical member 72 is supported and fixed to the case 51.

The thrust bearing device 56 has a cylindrical body 81 attached to the rotor shaft 32, a coil spring 82 mounted in the cylindrical body 81, one end of which is in contact with the coil spring 82, and the other end of the case. 51, a rolling ball bearing 84 fixed to an annular receiving plate 83 supported and fixed to the thrust bearing device 56. The thrust bearing device 56 controls the thrust force of the rotor shaft 32, It is receiving force in direction B.

In the above-described glass sheet processing apparatus 1, when the rotor shaft 32 is rotated by the operation of the electric motor 31, the annular grindstone 45 of the grinding wheel 33 is also rotated. The lower end of the glass plate 2 is chamfered by an annular grindstone 45 in contact with the lower end. In the glass plate processing apparatus 1, the rotor shaft 32 is supported by the air cylinder device 37 in an air float manner in the axial direction B, so that a minute vibration of the grinding wheel 33 in the axial direction B can be absorbed.
Thus, the possibility that the lower end of the glass plate 2 is chipped or broken due to the rigid contact of the annular grindstone 45 with the lower end of the glass plate 2 during grinding can be reduced. And since the bearing which holds the rotor shaft 32 rotatably and relatively slidably in the axial direction is constituted by the needle bearings 54 and 55, the contact of the needle roller with the rolling surface becomes a line contact, Thus, the allowable load can be increased, and the occurrence of abrasion damage on the rolling surface can be reduced, and the risk of bearing damage can be reduced.

[0017]

According to the present invention , the case and the case
The stator fixed to the case within
A turn arranged in the case so that it can rotate freely with respect to the child.
Trochanter and this rotor is attached and at the tip
Glass having a rotor shaft to which a grinding wheel is attached
Since the bearing structure of the electric motor for the plate processing device is such that the rotor shaft is rotatably and slidably held in the axial direction, the electric motor
In over data itself, it is possible to avoid a rigid contact to the glass plate of the grinding wheel can absorb a small vibration in the axial direction of the grinding wheel, the teeth
Therefore, a shaft for rotating the grindstone separately from the electric motor, etc.
Need not be provided, and the output of the electric motor
Provide a transmission mechanism such as a belt that transmits the rotation of the force rotation shaft
It is not necessary, and it is not
Slip and vibration caused by providing a transmission mechanism
Inconvenience such as life can be eliminated. In addition, since the bearing for holding the rotor shaft rotatably and relatively slidably in the axial direction is constituted by a needle bearing, the contact of the needle roller with the rolling surface becomes linear contact, and as a result, the allowable load Can be increased, the occurrence of wear scars on the rolling surface can be reduced, and the risk of bearing damage can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one preferred embodiment of the present invention.

FIG. 2 is an explanatory diagram of a glass sheet processing apparatus to which the specific example shown in FIG. 1 is applied.

[Explanation of symbols]

 31 Electric motor 32 Rotor shaft 53 Rotor 54, 55 Needle bearing 64, 74 Needle roller

Claims (4)

(57) [Claims] 1. A case and the case within the case.
The stator fixed to the base and the rotating
The rotor arranged in the case so that it is
Child is attached and a whetstone is attached to the tip.
For a glass sheet processing apparatus having a rotor shaft
A bearing structure of an electric motor for a glass sheet processing apparatus, wherein the bearing structure of a dynamic motor is such that a rotor shaft is rotatably and slidably held in an axial direction. 2. A bearing for rotatably holding a rotor shaft to which a rotor of an electric motor for a glass sheet processing apparatus is attached and to which a grindstone is attached at a tip is constituted by a needle bearing. The bearing structure of an electric motor for a glass sheet processing apparatus according to claim 1, wherein the bearing structure is relatively slidable in the axial direction. 3. The rolling surface of the needle roller on the outer race of the needle bearing and the rolling surface of the needle roller on the inner race of the needle bearing form a space in which the needle roller can slide in the axial direction. 3. The bearing structure of an electric motor for a glass sheet processing apparatus according to claim 1. 4. The bearing structure of an electric motor for a glass sheet processing apparatus according to claim 1, wherein the rotor shaft is urged in an axial direction by air elasticity.