JPH05269662A - Removal assisting device for grinding wheel - Google Patents

Abstract

PURPOSE:To easily achieve high efficiency of removal work of a grinding wheel and to enable effective response to a grinding wheel with small outer diameter without deteriorating rigidity of the grinding wheel. CONSTITUTION:A removal assisting device are provided with a cover member 88 which can be drawn in the axial direction of a rotating shaft 52, a shaft body 98 for rotating the cover member 88 around the axis crossing the axial direction and a locking means 124 which is fitted removably in an engagement hole 114 provided at the cover member 88. The locking means 124 is provided with an oscillating lock piece 142 which is interlocked with an action of this locking means 124 engaging with the engagement hole 114 and is engaged with one of groove parts 74a to 74c formed at a boss part 66 of a grinding wheel 52 so that this grinding wheel can be held.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grindstone attachment / detachment assisting device for attaching / detaching a grindstone constituting a gear grinder to / from a rotary shaft.

[0002]

2. Description of the Related Art For example, a grinding wheel used in a gear grinding machine has a thread-shaped grinding surface formed on the outer periphery thereof.
By being rotationally driven integrally with the rotary shaft that constitutes the spindle unit while being attached to the rotary shaft, the outer peripheral portion of the gear material is subjected to gear grinding through the threaded grinding surface. There is.

When attaching / detaching this type of grindstone to / from the rotary shaft, it is necessary for an operator to hold the grindstone and perform the attaching / detaching work. Therefore, the applicant of the present application has proposed a grindstone attachment / detachment assisting device to improve workability and protect the grindstone and the rotary shaft (see Japanese Utility Model Publication No. 63-31888).

In this attachment / detachment assisting device, the hanger pin is inserted into the lid cover, and the engaging groove portion provided in the hanger pin is engaged with the hole portion formed in the grindstone, so that the lid shaft is integrated with the slide shaft. By moving the cover, the grindstone is separated from the rotary shaft via the hanger pin. Then
The lid cover is pivoted about the axis of rotation and the grindstone is removed from the lid cover. As a result, workability is improved and damage to the grindstone and the rotary shaft can be effectively prevented.

[0005]

By the way, a grinding wheel of various sizes is used in a gear grinding machine according to the application, and in particular, a grinding wheel having a small outer diameter can be detached while maintaining a desired rigidity. It is desired to configure. Further, it is required to make the work of attaching and detaching the grindstone more efficient so as to improve the workability all at once.

The present invention has been made in view of this kind of request, and it is possible to easily improve the efficiency of the attachment / detachment work of the grindstone, and particularly for the grindstone for grinding having a small outer diameter dimension. An object of the present invention is to provide a grinding wheel attachment / detachment assisting device that can effectively cope with the decrease in rigidity of the grindstone.

[0007]

In order to achieve the above-mentioned object, the present invention is an attachment / detachment assisting device for attaching / detaching a grinding wheel to / from a rotationally driven rotary shaft. A cover member that can be pulled out in the axial direction, a shaft body that rotates the cover member around an axis line that intersects the axial direction, and a locking means that is detachable corresponding to an engagement hole provided in the cover member. The locking means is engaged with a groove portion formed in the grindstone in association with the operation of the locking means to engage with the engagement hole of the cover member, and the grindstone serves as the locking means. It is characterized in that it is provided with a swing locking piece that can be held against it.

[0008]

In the grinding wheel attachment / detachment assisting device of the present invention, when the locking means is attached in correspondence with the engaging hole provided in the cover member, it is rocked and locked in conjunction with the attaching operation. The piece engages with the groove of the grindstone. When the cover member is pulled out in the axial direction of the rotary shaft, the grindstone held by the locking means is disengaged from the rotary shaft via the swing locking piece, so that the grindstone can be easily attached and detached. To be done. In that case, if the groove is formed on the outer periphery of the relatively thick cylindrical shaft portion of the grindstone, it is possible to reliably prevent the rigidity of the grindstone even if the outer diameter is small.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A grinding wheel attachment / detachment assisting device according to the present invention will be described in detail below with reference to an embodiment in relation to a gear grinding machine incorporating the same.

In FIG. 1, reference numeral 10 indicates a gear grinding machine, and a cutting table 14 is arranged on the upper surface of a bed 12 constituting the gear grinding machine 10 so as to be movable back and forth in the direction of arrow A. The cutting table 14 is engaged with a ball screw 18 connected to the first motor 16. A traverse table 20 is arranged on the cutting table 14 so as to move back and forth in the direction of arrow B.
It is engaged with a ball screw 24 connected to the second motor 22.

A work holding mechanism 26 is provided on the traverse table 20. The work holding mechanism 26 includes a headstock 28 and a tailstock 30, and the headstock 28 is a work W which is a gear material. And a third motor 32 for rotating the. A work sensor 34 is arranged on the traverse table 20 close to the work W.

A column 36 is erected on the bed 12 in front of the cutting table 14 in the traveling direction, and a swivel table 38 is held by the column 36. The turning table 38 is
A fourth motor 40 is rotatable in the direction of arrow C. A fifth motor 42 is fixed to the upper part of the front surface of the swing table 38. A ball screw 44 connected to the fifth motor 42 and extending in the direction of arrow D shifts the shift table. 46 engages.
A grindstone spindle unit 48 is attached to the shift table 46. This grindstone spindle unit 48
Includes a sixth motor 50 for rotating the grindstone.
The rotating shaft 52 is rotationally driven by the motor 50. As shown in FIG. 2, a taper shaft portion 56 is provided in the axial direction from the tip end portion of the rotary shaft 52, and the taper shaft portion 56 has a tapered shape and has a first screw portion 58a and a second screw portion at the end portion. And 58b are formed coaxially. The first and second screw portions 58
Nuts 60a and 60b are screwed onto the a and 58b to hold the grinding wheel 62 on the rotary shaft 52.

The grindstone 62 has a taper shaft portion 56 of the rotary shaft 52.
A cylindrical boss portion (cylindrical shaft portion) 66 having a tapered hole 64 that is fitted to the boss portion 66, a thin annular plate portion 68 that projects radially outward from the outer peripheral portion of the boss portion 66, and the ring. A cylindrical portion 72 is provided at the outer end of the plate portion 68 concentrically with the boss portion 66 and has a threaded grinding surface 70 on the outer periphery thereof. Grooves 74a to 74c are formed on the tip end side of the outer peripheral portion of the boss portion 66 at predetermined angular intervals and are notched in the circumferential direction (see FIG. 3). The screw holes 76a to 76c are provided at equal angular intervals, and the screw holes 76a to 76c are provided.
A grinding stone removing bolt 78 is fitted to 6c.

The attachment / detachment assisting device 80 according to the present embodiment surrounds the grindstone 62 so as to surround the spindle unit 48.
It is provided in. The attachment / detachment assisting device 80 includes a cylindrical cover 84 fixed to a support base 82 that constitutes the spindle unit 48, and a side portion of the cylindrical cover 84 is for exposing a part of the grindstone 62 to the outside. Cutout 86
Is formed (see FIG. 3), and a cover member 88 is attached to the opening end of the cylindrical cover 84 so as to be pulled out in the axial direction of the rotary shaft 52 via two slide shafts 90.

The slide shaft 90 has a cylindrical cover 84.
Is slidably fitted to a guide cylinder 92 integrally provided on the side of the guide cylinder 92 extending in parallel with the rotary shaft 52, and a set screw 94 screwed to an end of the guide cylinder 92 is used. Fixed. A support member 96 is fixed to the tip end of the slide shaft 90, and a rotary base 100 is supported by a shaft body 98 that is fixed to the support member 96 in the vertical direction. Swivel base 1
00, a stopper pin 102 is screwed in, and the turning base 100 is held by the shaft body 98 by fitting the tip of the stopper pin 102 to the shaft body 98.

A cover member 88 is fixed to the turntable 100, and the cover member 88 is attached to the cylindrical cover 84. A plurality of (four in the figure) screw holes 104 are formed at the end of the cylindrical cover 84, and the cover member 88 is provided with
A plurality of hole portions 10 corresponding to the screw holes 104 and having a diameter larger than the head portion of the bolt 106 screwed into the screw holes 104.
8 is formed. The cover member 88 has a hook member 11 which is proximate to each hole 108 and which is swingable by a bolt 110.
2 is attached, and the hook member 112 is engageable with the bolt 106.

A nut 60 is provided at the center of the cover member 88.
Attaching and detaching a and 60b, and locking means (described later)
An engaging hole 114 for attaching the mounting hole is formed, and two bolts 116 are screwed outside the engaging hole 114 (see FIG. 3). The engagement hole 114 is provided in the gear grinding machine 10.
While it is covered with a window cover (not shown) during the operation, the mounting base 126, which constitutes the locking means 124 corresponding to the engagement hole 114, is attached during the attachment / detachment work of the grindstone 62.
A substantially ring-shaped flange portion 128 provided at an end portion of the mounting base 126 is provided with a hole portion 130 for allowing the head portion of the bolt 116 to pass therethrough, and a hook member 132 engageable with the bolt 116. .. At the end of the flange 128,
A cylindrical bulge portion 134 that can be fitted into the engagement hole 114 is formed. An operator attaches the mount 1 to the flange 128.
The grip 135 for easy handling of the
a and 135b are fixed.

A hole 136 is formed in the central portion of the mounting base 126, and three rectangular groove portions 138 are formed on the inner peripheral wall surface of the hole 136 at equal angular intervals, and each groove portion 13 is formed.
A rocking locking piece 142 is attached to the pin 8 via a pin 140. A protrusion 144 is formed on the inner surface side of the rocking locking piece 142 so as to be directed to the hole 136 side, and three elastic rings (elastic bodies) 146 are formed on the outer surface side of each rocking locking piece 142.
Engage. The elastic ring 146 is made of resin, metal or the like, and the rocking locking piece 142 is formed by its elastic force.
Are pressed toward the center of the hole 136.

Next, the gear grinding machine 1 configured as described above.
The operation of 0 will be described in relation to the attachment / detachment assisting device 80 according to the present embodiment.

Headstock 28 constituting the work holding mechanism 26
The workpiece W is held on the tailstock 30 and the tailstock 30, and the cutting table 1 is driven by the driving action of the first and second motors 16 and 22.
The work holding mechanism 26 is displaced to a predetermined position in the arrow A direction and the arrow B direction via the 4 and the traverse table 20.

On the other hand, on the side of the grindstone 62, first, the fourth motor 4
Under the driving force of 0, the turning table 38 is turned to a predetermined angle in the direction of the arrow C, and the grindstone 62 is tilted at a predetermined angle with respect to the work W integrally with the turning table 38. Then, the shift table 46 provided on the turning table 38 is displaced to a predetermined position via the fifth motor 42. Thereby, the work W and the grindstone 62 are positioned, and after the initial phase alignment between the grindstone 62 and the work W is further performed, the sixth motor 50 of the grindstone spindle unit 48 and the third motor of the work holding mechanism 26. 32 and 32 are synchronously operated. Therefore, the work W is subjected to gear grinding through the threaded grinding surface 70 of the grindstone 62.

When the grindstone 62 is removed from the rotary shaft 52, the rotary table 38 is first rotated under the driving action of the fourth motor 40, and the rotary shaft 52 is horizontally arranged. Then, after the bolt 116 screwed into the cover member 88 is loosened and the window cover (not shown) is removed from the cover member 88, the mounting base 126 that constitutes the locking means 124 corresponding to the engagement hole 114 is removed. Be attached. Here, when the bulging portion 134 of the mounting base 126 is fitted into the engaging hole 114, the protrusion portion 144 of each swing locking piece 142 is formed in the groove portion 74 a formed on the outer peripheral portion of the boss portion 66 of the grindstone 62. To 74c, the protrusion 144 swings into the grooves 74a to 74c under the pressing action of the elastic ring 146. Therefore, the wobbling stone 62 is held by the locking means 124 by the rocking locking piece 142. At that time, mount 1
The head of the bolt 116 projects to the outside through the hole 130 of 26, and the bolt 116 is tightened with the hook member 132 engaged with the head of the bolt 116. As a result, the mount 126 is fixed to the cover member 88.

Further, the first and second nuts 60a and 60b are attached to the rotary shaft 52 through the hole 136 of the mount 126.
Are removed from the first and second screw portions 58a and 58b, and a protective cap or the like is attached to the first and second screw portions 58a and 58b as necessary. Then, the bolt 106 fixing the cover member 88 to the cylindrical cover 84 is loosened, the hook member 112 is removed from the bolt 106, and the set screw 94 fixing the slide shaft 90 is loosened.

In this state, the bolts 78 screwed into the screw holes 76a to 76c of the grindstone 62 are attached to the screw holes 76a to 76c.
When screwed into a to 76c, the tip of the bolt 78 contacts the end surface of the rotary shaft 52. Therefore, bolt 7
The grindstone 62 is released from the close contact state with the rotary shaft 52 under the pressing action of 8, and then the grindstone 62 is held by the locking means 124 and integrally with the cover member 88 in the arrow E direction (the axis of the rotary shaft 52). Direction) to a predetermined position (see FIG. 4).

Next, after the stopper pin 102 screwed into the turntable 100 is loosened to release the fixing action of the turntable 100, the cover member 88 is horizontally moved around the shaft body 98 as a fulcrum. That is, about the axis line intersecting the axial direction of the rotary shaft 52, the grindstone 62 is swung by, for example, 180 °, and is directed to the opposite side of the rotary shaft 52 (FIG. 4).
reference). Therefore, when the operator holds the grindstone 62 and rotates it by a predetermined angle or more, the boss portion 6 of the grindstone 62 is rotated.
The groove portions 74a to 74c formed in 6 are the locking means 124.
Is separated from the protrusion 144 of the swing locking piece 142. Accordingly, when the grindstone 62 is pulled out in the axial direction, the grindstone 62 is detached from the locking means 124. A new grindstone 62 is attached to the rotary shaft 52 by performing the work reverse to the above work.

In this case, in this embodiment, grooves 74a to 74c are formed on the outer peripheral portion of the boss portion 66 of the grindstone 62, and the rocking locking pieces 142 constituting the locking means 124 are formed in the grooves 74a to 74c. The attaching / detaching work of the grindstone 62 is performed by engaging the protrusions 144. Therefore, when using the grindstone 62 having a particularly small outer diameter, it is not necessary to provide a hole in the thin ring plate portion 68 of the grindstone 62, and it is possible to reliably prevent the rigidity of the grindstone 62 itself from being lowered. The effect of being able to do is obtained. The boss portion 66 of the grindstone 62 is considerably thick in the axial direction, and by forming the groove portions 74a to 74c in the outer peripheral portion of the boss portion 66, the rigidity of the whole grindstone 62 is effectively maintained. Is possible.

Moreover, in this embodiment, the mounting base 126 constituting the locking means 124 is provided with the engaging hole 114 of the cover member 88.
And the rocking locking piece 142
The protrusion 144 automatically engages with the grooves 74a to 74c of the grindstone 62 via the elastic force of the elastic ring 146. Therefore, the grindstone 62 can be held via the locking means 124 only by performing the work of attaching the mounting base 126 to the cover member 88, and the work of attaching and detaching the grindstone 62 is simplified and made efficient at once. The effect is obtained.

[0028]

The grinding wheel attachment / detachment assisting device according to the present invention has the following effects.

When the locking means is attached in correspondence with the engaging hole provided in the cover member, the rocking locking piece automatically engages with the groove portion of the grindstone in association with the attaching operation. Therefore, the work of attaching / detaching the grindstone can be performed easily and efficiently. In that case, if the groove is formed on the outer periphery of the relatively thick cylindrical shaft portion of the grindstone, it is possible to reliably prevent the rigidity of the grindstone even if the outer diameter is small.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a gear grinding machine incorporating a grinding wheel attachment / detachment assisting device according to an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of the attachment / detachment assisting device.

FIG. 3 is a front view of the attachment / detachment assisting device.

FIG. 4 is an operation explanatory view of the attachment / detachment assisting device.

[Explanation of symbols]

 10 ... Gear grinding machine 48 ... Whetstone spindle unit 52 ... Rotating shaft 62 ... Whetstone 66 ... Boss portions 74a to 74c ... Groove portion 80 ... Attachment / detachment assisting device 84 ... Cylindrical cover 88 ... Cover member 90 ... Slide shaft 98 ... Shaft body 114 ... Engaging hole 124 ... Locking means 126 ... Mounting base 142 ... Swing locking piece 144 ... Projection 146 ... Elastic ring

Claims (2)

[Claims] 1. A detachment assisting device for attaching and detaching a grindstone to a rotationally driven rotary shaft, comprising: a cover member that can be pulled out in the axial direction of the rotary shaft; A shaft body that is rotated around an axis line that intersects with, and a locking unit that is attachable / detachable corresponding to an engagement hole provided in the cover member, and the locking unit is configured such that the locking unit is the cover. It is characterized by comprising a rocking locking piece capable of engaging with a groove formed in the grindstone and interlocking with the engaging hole of the member to hold the grindstone with respect to the locking means. Auxiliary attachment / detachment device for grinding wheels 2. The attachment / detachment assisting device according to claim 1, wherein the groove is formed on the outer circumference of the cylindrical shaft of the grindstone, and the rocking locking piece is interposed by an elastic body to engage with the groove. A grinding wheel attachment / detachment assisting device that is configured to be swingable in a radial direction of the cylindrical shaft portion.