JPS5837109B2 - Grinding wheel cover - Google Patents

Description

[Detailed Description of the Invention] The present invention involves attaching a wide grindstone or several grindstones side by side to a single shaft, supporting both ends of the shaft and rotating the grindstone to perform grinding. This invention relates to a grinding wheel cover for a grinding machine that is removed from the machine along with its shaft member.

Conventional whetstone covers of this kind cover the entire whetstone with a welded steel plate structure or an integral structure made of cast metal, but when the whetstone is replaced, the entire whetstone cover is removed using a lifting device or the like and moved to an empty space around the machine.

After that, the grindstone shaft member was removed, which required time and a place to place the grindstone cover.

In addition, in the case where the whetstone cover is divided into upper and lower halves as shown in Fig. 1, the lower side is fixed and the upper side is rotated upwards around an axis diagonally above the rear side of the whetstone, the upper part of the whetstone is rotated in order to rotate the cover. Space is needed.

In addition, since the position for turning and waiting is diagonally behind the grinding wheel, it affects the mounting method of each device such as a dressing device that is normally placed behind the grinding wheel at the time of design, making it difficult to operate each device. Ta.

Therefore, the present invention uses a method in which the cover is rotated without removing it from the grinding machine when replacing the grinding wheel, so that the space required by the rotation of the cover is almost the same as in the grinding state. A fixed cover that fixes a covering member to a whetstone head, a member that covers the upper side of the whetstone, and a notch that allows the whetstone shaft member to pass upward when the upper side is rotated to the lower side. It is composed of a member that covers both sides of the installed whetstone and a rotating cover that supports the whetstone so that it can rotate around the axis of the whetstone.

When replacing the whetstone, rotate the rotating cover in the same direction as the whetstone until the cover on the top of the outer periphery is lower than the horizontal height of the whetstone axis, and remove some of the cooling water piping and other various equipment to remove the whetstone cover from the machine. The grindstone can be replaced by removing the grindstone and the grindstone shaft member without having to remove it.

An embodiment of the present invention will be described with reference to FIGS. 2 to 6. A plurality of grindstones 1 are fixed to a sleeve 4 with a nut 3 via a distance collar 2.

The sleeve 4 passes through the through hole and is supported at both ends by the left and right support parts 40, 40' of the grindstone head 5, and is supported by presser feet 6, 6'.
The shaft 7 is supported by bearings 8 and 8' fitted inside the left and right support portions of the shaft 7, which is detachably held in the shaft 7.

A pulley 9 fixed to the right end of the sleeve 4 transmits the rotation of a motor (not shown) disposed behind the grindstone to rotate the grindstone 1.

In such a grinding machine, a fixed cover 10 that covers the lower and rear sides of the grinding wheel 10 is fixed to the inside of the shaft support portions 40, 40' of the grinding wheel head 5 with bolts, and the sleeve 4 is mounted vertically upward on both side plates of the fixed cover 10. There is a notch wide enough to pass through.

A guide ring 1 having a notch with the same width and the same phase position as the notch is provided on the inside of both sides of the fixed cover 10.
1 and 11' are coaxially fixed to the sleeve 4 with bolts.

By devising the shape of the fixed cover and the guide ring, this notch is not absolutely necessary.

Inside the fixed cover 10, there is also a
A rotary cover 13 consisting of a top plate covering the upper side with a width of
Rotating ring 1 4 fitted on the outer periphery of 1 , 1 1'
.
1 is provided.

When the rotary cover 13 rotates and the top plate comes down, the notch 41 can match the position of the notch in the fixed cover 10.

Furthermore, a notch 41 is provided on the outer periphery of the left side 14 of the rotating ring.
A tooth profile is engraved approximately halfway around the upper rear.

An operating shaft 15 having a gear 42 that meshes with the tooth profile is supported on the fixed cover 10 diagonally above the front of the grindstone shaft.

At the rear of the whetstone is a rotary dresser 16 that corrects each whetstone.
is provided and cut toward the axis of the grindstone by a cutting device (not shown).

On the upper surface of the fixed cover 10, an upper lid 17 for fixing the rotating cover 13 is fixed to the fixed cover 10 with bolts and has the same width as the rotating cover 13.

A shaft 1 provided horizontally at the top of the front edge of the top plate of the rotating cover 13
Grindstone front cover 1 with triangular side plates 20 pivotally supported at 8
9 is provided to shield the front upper part of the grindstone 1 and to regulate the flow around the outer circumference of the grindstone 1.

Sprockets 23 and 24 are keyed to both ends of a shaft 22 that is supported by a bracket 21 fixed to the rear side of the right-hand grindstone shaft support 40' of the grindstone head 5.

A chain 25 that transmits the movement of a cutting device (not shown) of the dresser 16 is stretched around the sprocket 23 .

A box-shaped member 27 is fixed to the right side of the fixed cover 10 above the bracket 21 with bolts.

A sprocket 2 that can rotate in the direction of the grinding wheel axis is disposed within the member 27.
8 and a screw gear 29 are integrally supported.

The sprocket 28 is connected to the sprocket 24 by a chain 26.

A screw gear 43 carved on the shaft 30 is located above the screw gear 29 so that its axis is orthogonal and meshes with the screw gear 29.
It is supported by the box-shaped member 27, and a helical gear 31 is keyed to the front end of the shaft 30.

A helical gear 33 that meshes with the helical gear 31 and has a female thread at the center is supported at the same horizontal height as the helical gear 31 by a bracket 32 fixed to the upper center of the right side of the rotating cover 12.

The helical gear 33 is restricted from moving in the axial direction with respect to the bearing member 32 by the nut 34 .

The direction of the tooth trace at the meshing point of both of the helical gears 31 and 33 coincides with the tangential direction of a circle centered on the grindstone axis and passing through the meshing point.

The front end corner 35 of the screw 44 which is screwed into the female thread of the helical gear 33 is connected by a pin 36 to a fork 46 of a connecting rod 38 which is pivotally supported on the side plate 20 of the grindstone front cover 19 at one end 37. .

As a result, the screw 44 becomes unrotatable and the helical gear 330
The rotational movement is converted into an axial movement, and the grindstone front cover 19 is rotated via the connecting rod 38.

Next, the effect will be explained.

To replace the grindstone, remove the top cover 17 that is on the top surface of the fixed cover 10 and fixes the rotating cover 13, and also remove equipment such as cooling water pipes on the top of the grindstone cover.

Next, when the operating shaft 15 supported on the left side of the fixed cover 10 is turned counterclockwise, the gear 42 becomes integral with the operating shaft 15.
The rotating ring 14 that meshes with the guide rings 11, 11 is rotated.
Turn 'l' The cover 13 is turned in the direction of rotation of the grindstone.

Then, the rear edge 12 of the top plate of the rotating cover 13 is rotated to a position approximately equal to the horizontal height of the grinding wheel axis. Then, the notch 41 provided in the side plate of the rotating cover 13 is located perpendicularly on the grindstone axis, which corresponds to the position of the notch in the fixed cover 10.

Next, by removing the presser feet 6, 6' at both ends of the grinding wheel shaft, the upper surfaces of the grinding wheel 1, sleeve 4, and shaft 7 are no longer shielded, and the entire structure can be lifted vertically upward.

On the other hand, when the cutting device of the dresser 16 is driven to correct the grindstone during grinding work, the dresser 16 corrects the outer periphery of the grindstone 1 and reduces the diameter of the grindstone 1.

At this time, the cutting device cuts into the dresser 16 and at the same time transmits a movement corresponding to the amount of cutting to the chain 25.

This amount of movement corresponds to the sprockets 23, 24 and chain 26.
, sprocket 28 screw gear 29, screw gear 43, shaft 3
0, which is transmitted to the helical gears 31 and 33 as a rotation amount.

...The rotation of the ring gear 33 causes the screw 44 that engages with the female thread of the gear 33 to move rearward.

The axial movement of the screw 44 causes the grindstone front cover 19 to pivot via the lever 38 so as to correspond to the decrease in the diameter of the grindstone 1 and maintain a substantially constant gap with the outer periphery of the grindstone.

Since the tooth trace direction of the helical gears 31, 33 at the meshing point of the helical gears 31, 33 is the same as the tangential direction of the rotation of the meshing point when the rotating cover 13 rotates, the helical gears 31, 33 move as the rotating cover 13 moves. The gears 31 and 33 are disengaged without rotational interference.

Also, when rotating the rotary cover 13 back to its original position after the grindstone has been replaced, the positions of the teeth of both gears 31 and 33 remain unchanged, so the meshing is smooth, and the grindstone front cover 19 before the grindstone is replaced. The relative positional relationship between the dresser 16 and the dresser 16 is restored as is.

As explained above, the present invention provides a fixed cover that covers the lower and rear sides of the grinding wheel, and a rotary cover that is centered around the axis of the grinding wheel, which consists of an upper cover on the outer periphery of the grinding wheel and a side cover of the grinding wheel that has a notch through which the grinding wheel sleeve passes. Since the grindstone is configured to be rotatable, the grindstone and the grindstone shaft member can be easily removed by simply rotating the rotary cover when replacing the grindstone.

Therefore, there is no longer a need for a place to store the grinding wheel cover near the grinder.

The space required by the rotation of the rotary cover is almost the same as in the grinding state, making it easier to arrange various equipment behind the grinding wheel head, and also making it easier to operate the dresser etc. after removing the grinding wheel.

Furthermore, the grinding wheel front cover, which is pivotally supported on the rotating cover, is connected to the fixed cover and the rotating cover by a drive mechanism that is linked to the notch of the dresser. Since a pair of helical ring gears are used in the same direction as the tangential direction of the circle, the gears can be smoothly disengaged and engaged without changing the positional relationship between the grindstone front cover and the dresser.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the prior art, FIG. 2 is a sectional view of the embodiment of the present invention in the direction of the grinding wheel axis indicated by BB in FIG. 3, and FIG. 3 is a sectional view taken along the line AA in FIG. Fig. 4 is a right side view showing a part in cross section, Fig. 5 is an enlarged view of a part of the C-C view in Fig. 4, and Fig. 6 is a diagram showing D in Fig. 3. It is a diagram showing an enlarged view of the -D cross section. 1...Whetstone, 4...Sleaf, 5...
...Whetstone head, 7...Axis, 10...
Fixed cover 13...Rotating cover 16...
... Dresser, 19 ... Grindstone front cover 3L33
...Helical gear, 41, curve, notch.

Claims (1)

[Scope of Claims] 1. A fixed cover in which a grinding wheel shaft is supported by a grinding wheel head at both ends and is removed together with the shaft member to which the grinding wheel is attached when replacing the grinding wheel, in which a member that covers at least the rear side of the grinding wheel is fixed to the grinding wheel head. Then, a member covering the upper side of the whetstone and a member covering both sides of the whetstone having a cutout through which the whetstone shaft member can pass upward when the upper side member rotates to the lower side are attached around the whetstone shaft. A grindstone cover characterized in that it is configured in combination with a rotating cover supported so as to be rotated. 2. In a grinding machine where the whetstone shaft is supported by the whetstone head at both ends and the shaft member to which the whetstone is attached is removed when replacing the whetstone, a fixed cover consisting of a member that covers at least the rear side of the whetstone is fixed to the whetstone head, and a fixed cover that covers the upper side of the whetstone. The covering member and the member covering both sides of the grinding wheel having cutouts through which the grinding wheel member can pass upward when the upper covering member rotates to the lower side are rotated around the grinding wheel axis. a rotating cover supported on the rotating cover, a grindstone front cover pivotally mounted on the front advancing part of the rotating cover, and a drive for rotating the grindstone front cover in conjunction with a cutting device of the dresser to adjust the grindstone gap. The middle part of the drive mechanism is installed on the fixed cover side, and the chain gear and the rotating cover side are connected by a chain gear, and the tooth thread direction at the meshing point is centered on the grinding wheel axis at that point. A whetstone cover characterized by a tangential direction to a circle.