JP5058101B2 - Split pulley - Google Patents

Description

  The present invention relates to a split pulley, and more particularly, to a split pulley attached to a shaft of a device.

  Conventionally, a pulley for hanging a V-belt has a V-shaped groove to prevent the V-belt from coming off. Therefore, when replacing the V-belt, the mechanism that adjusts the tension of the V-belt is disassembled, or a jig for extending the V-belt is used, and the V-belt is pulled out of the groove. It took time and effort to send it in.

  Therefore, in Patent Document 1 below, it is possible to easily rotate the pulley and feed it into the groove of the belt with a single jig so that the belt can be secured safely without requiring a high level of skill from the worker. And a lever for rotating the pulley so that the belt fitting is detachably attached to the pulley at a position close to one end side so that the belt fitting is orthogonal to the rotation center of the pulley. A belt fitting comprising grips provided at both ends of the lever and a belt hook for positioning the belt start portion corresponding to the pulley groove when the lever is attached to the pulley. A tool is disclosed.

In addition, in Patent Document 2 below, a pulley outer frame body, a spacer, and a screw are configured so as to be surely fixed even when the shaft to be attached is short. Consists of two pieces that are evenly divided in the radial direction. The spacer has a cylindrical shape. The upper and lower ends of the spacer are integrally formed with a flange that protrudes radially outward. The flange portion abuts against the upper end surface of the pulley outer frame body and the step portion provided on a part of the inner wall, so that a part of the pulley outer frame body in the thickness direction is interposed between the flange portions. Split so that when the pulley outer frame body is fastened with screws, the gap provided between the pulley outer frame inner peripheral surface and the spacer outer peripheral surface acts as a tightening allowance. A mold pulley is disclosed.
JP 2001-323977 A JP 2008-082902 A

However, in the belt fitting disclosed in the above-mentioned Patent Document 1, a jig is attached to the shaft of the pulley, a part of the jig is inserted inside the belt, and then the jig is rotated to rotate the belt. Since it is inserted into the groove of the pulley while extending, there is a problem that it is difficult to mount and operate the jig in a narrow place.
Further, when a belt having low stretchability is fitted in the groove of the pulley, too much tension is applied, and there is a problem that the belt may be damaged.

  An object of the present invention is to provide a split pulley that can easily perform belt attaching / detaching work even in a narrow place and can perform belt attaching / detaching work without damaging the belt.

The split pulley according to the present invention is a split pulley (50) attached to the shaft of a device, and includes a left block (50 _L ), a middle block (50 _C ), and a right block (50 _R ). The block includes a cylindrical left belt hanging portion (51 _L ) and a left side hook portion (52 _L ) formed integrally with the left belt hanging portion on the side surface of the left belt hanging portion on the device side, The middle block includes a cylindrical right belt hanging portion (51 _R ) and a middle collar portion (52 _C ) formed integrally with the right belt hanging portion on the side surface of the right belt hanging portion on the device side, The right block includes a starboard part (52 _R ), the left belt hanging part and the left staring part of the left block, the right belt hanging part and the middle collar part of the middle block, and the right block of the right block. Multiple fixed bolts on the outer periphery of the starboard (55 _to 554 ₄₎ and a plurality of screw holes formed for attaching the in block and the right block in the left block by the in blocks, the center of the device side surface in said flange portion The first and second intermediate protrusions (53 _C1 , 53 _C2 ) formed integrally with the middle collar portion so as to face each other are further provided, and the right block includes the starboard portion on the device side The left belt hooking portion of the left block further includes first and second right protrusions (53 _R1 , 53 _R2 ) formed integrally with the starboard portion so as to face each other on the center side of the side surface of the left block. The first and second left insertion holes (54 _L1 , 54 _L2 ) into which the first and second middle protrusions of the middle block are respectively inserted are formed on the side surface opposite to the device. Of the right belt hook of the middle block The side opposite to the serial device, said first and second inside insertion hole the right blocks first and second right protrusions are respectively inserted (54 _C1, 54 _C2) is formed Features.

The split pulley according to the present invention has the following effects.
(1) Since the entire second hook part or a part of the outer peripheral part formed on the side surface opposite to the device of the belt hanging part can be removed from the belt hanging part, Since the belt can be easily attached / detached by removing all of the collar part or a part of the outer peripheral part from the belt hanging part, the belt attaching / detaching work can be easily performed even in a narrow place.
(2) Since the belt attaching / detaching operation can be performed without applying an unnecessary tension to the belt itself, the belt attaching / detaching operation can be performed without damaging the belt.
(3) Even with a pulley of a type that uses a plurality of belts for the same purpose, the effects (1) and (2) can be obtained by making it possible to remove the hooks other than the hooks on the device side.
(4) The torque can be varied by preparing a plurality of blocks with different diameters of the belt hooks.

  The above object has been achieved by enabling the removable part including the part that constitutes the whole of the collar part opposite to the device of the split pulley together with the second collar part to be removed from the belt hook part.

Embodiments of the split pulley according to the present invention will be described below with reference to the drawings.
First, a split pulley 10 according to a first embodiment of the present invention will be described with reference to FIGS.
In the following, the center side, outer periphery side, radial direction and circumferential direction of the split pulley 10 when the split pulley 10 is viewed in the direction perpendicular to the plane of FIG. They are referred to as “radial direction” and “circumferential direction”, respectively. In addition, the direction perpendicular to the paper surface of FIG. 1A is referred to as an “axial direction”.

  The split pulley 10 according to the present embodiment is characterized in that a half of the outer peripheral portion of the collar portion on the side opposite to a device such as a motor is formed to be removable from the belt hanging portion.

That is, as shown in FIGS. 1A and 1B, the split pulley 10 is formed integrally with the belt-hanging portion 11 on the cylindrical belt-hanging portion 11 and the side surface of the belt-hanging portion 11 on the device side. has been, and split first the flange portion 12 ₁ that constitutes the whole of the flange portion of the device side of the pulley 10, the device opposite side to the belt hook portion 11 integrally formed with the belt hook 11 And a second flange portion 12 ₂ constituting a part of the flange portion on the opposite side to the device of the split pulley 10, and the second pulley portion 12 ₂ on the opposite side of the device of the split pulley 10. A detachable part 13 having a part constituting the entire collar part and removable from the belt hanging part 11, and first to third fixing bolts 14 ₁ for attaching the removable part 13 to the belt hanging part 11 -14 ₃ and the belt hook 11 of the _second flange 12 ₂ A second flange portion 12 ₂ and the shaft fixing portion 15 which is integrally formed on the opposite side, comprises a shaft fixing bolt 16.

Here, as shown by a broken line in FIG. 1B, the belt hooking portion 11, the first and second flange portions 12 ₁ and 12 _{2 and the} shaft fixing portion 15 are centered on the shaft of the device (the motor shaft). A shaft through hole for penetrating the output shaft or the like is formed.
Also, split-type pulley 10, the first flange portion 12 ₁ of the shaft through-hole of the instrument shaft, the shaft through-hole of the belt receiving portion 11, the second shaft through-hole and the shaft fixing portion 15 of the flange 12 ₂ After passing through the shaft through holes in order, the shaft fixing bolt 16 is screwed into the screw hole formed in the shaft fixing portion 15, and the tip of the shaft fixing bolt 16 is engaged with the key groove formed on the shaft of the device. By joining, it is attached to the shaft of the device.

On the side surface of the belt hook 11 opposite to the device, a recess is formed for fitting the removable portion 13 when the removable portion 13 is attached to the belt hook 11 (see FIG. 1B). .
Further, the flange portion 12 ₁ recess formed portion and the first of the belt receiving portion 11, mounting the removable part 13 to the belt receiving portion 11 by the first through third fixing bolt 14 _{1-14 3} First to third screw holes are formed (see FIG. 1B).

The first flange portion 12 ₁ has a disk shape, and the diameter of the _first flange portion 121 is larger than the diameter of the belt hook portion 11. Also, run-off portions than the first flange portion 12 ₁ of the belt receiving portion 11 of the side surface belt receiving portion 11 is a slope so as to form a groove for applying a V-belt.

The second flange portion 12 ₂ has a shape obtained by cutting the outer peripheral portion of the disk in half, and the diameter of the _second flange portion 12 ₂ is the same as the diameter of the first flange portion 12 ₁ . Further, it protruded portions of the belt hook portion 11 of the belt receiving portion 11 side of the side surface of the second outer circumferential portion of the flange 12 _2, like the first flange portion 12 _1, a groove for applying a V-belt It is considered as a slope to form.

The removable portion 13 includes a first portion that fits into the recess of the belt hanging portion 11, and a second flange when the removable portion 13 is fitted into the recess of the belt hanging portion 11 and attached to the belt hanging portion 11. 12 ₂ and a second portion (a half portion of the outer peripheral portion of the disk cut off) constituting the flange portion on the side opposite to the device of the split pulley 10. The portion of the second portion of the removable portion 13 that protrudes beyond the belt hooking portion 11 on the side of the belt hooking portion 11 hangs the V-belt in the same manner as the first and second flange portions 12 ₁ and 12 _2. It is made into a slope so as to form a groove for.

Incidentally, detachable unit 13 is attached to the belt receiving portion 11 so that both end faces are in contact in the second flange portion 12 both end faces of the _second outer peripheral portion and a removable portion 13, rotates the split type pulley 10 In order to prevent the detachable portion 13 from detaching due to the centrifugal force sometimes, a hook is provided at the joint between the _second flange portion 122 and the detachable portion 13.
That is, as shown in FIG. 1A, the end surface on the center side of the removable portion 13 protrudes from the end surface on the outer peripheral side of the removable portion 13 and the end on the outer peripheral side of the end surface on the central side of the removable portion 13 is removable portion 13 the outer peripheral side of the end surface of the center side of the step 13a which is formed so as the outer circumferential side than the end of both end faces of the both end surfaces of the second outer circumferential portion of the flange portion 12 ₂ and the removable portion 13 Is provided at the center in the radial direction.

Next, as shown in FIGS. 2A and 2B, the procedure for removing the V belt 20 hung between the drive-side split pulley 10 and the load-side pulley 21 will be described with reference to FIGS. This will be described with reference to FIG.
FIG. 2B is a top view as viewed from the paper surface of FIG. 2A, but the snap roller 22 is omitted. The same applies to FIGS. 3B to 9B.

  After the operator stops the device with the split pulley 10 attached to the shaft, the worker manually rotates the split pulley 10 to the right as shown by the arrow in FIG. As shown in (b), the removable part 13 is placed on the upper side.

Subsequently, the worker removes the _{first to} third fixing bolts 14 _{1 to} 14 ₃ and removes the removable portion 13 from the belt hook portion 11 as shown in FIGS. 4 (a) and 4 (b). Thereafter, the operator pulls the V belt 20 located at the removed removable portion 13 toward the front (opposite side of the device) as shown by an arrow in FIG. As shown, the split pulley 10 is manually rotated to the left to remove the V-belt 20 from the split pulley 10.

  As a result, the V belt 20 can be removed from the split pulley 10 as shown in FIGS. 5A and 5B, and the V belt 20 can be removed without applying excessive tension to the V belt 20 itself. Can do.

  Next, a procedure for attaching a new V-belt 20 ′ between the split pulley 10 and the pulley 21 instead of the V-belt 20 removed as described above will be described with reference to FIGS. 6 to 9. To do.

  As shown in FIGS. 6 (a) and 6 (b), the worker makes the position where the removable portion 13 is attached to the upper left and hangs a new V-belt 20 ′ on the pulley 21.

  Subsequently, the worker puts a new V-belt 20 ′ in the lower groove of the split pulley 10 as shown in FIGS. 7A and 7B, and is indicated by an arrow in FIG. 7A. In this way, the split pulley 10 is manually rotated rightward so that a new V-belt 20 ′ is hung on the split pulley 10.

When the new V-belt 20 'is completely hung on the split pulley 10 as shown in FIGS. 8 (a) and 8 (b) in this manner, the worker will be shown in FIGS. 9 (a) and 9 (b). After the detachable portion 13 is fitted into the recess of the belt hook portion 11 as described above, the detachable portion 13 is fixed to the belt hook portion 11 by the _{first to third} fixing bolts 14 _{1 to} 14 ₃ .

  As a result, the new V-belt 20 ′ can be easily attached to the split pulley 10, and the new V-belt 20 ′ can be attached without applying unnecessary tension to the new V-belt 20 ′ itself. .

In the above description, half of the outer peripheral portion of the second flange portion 12 ₂ is the removable portion 13, but the removable portion 13 is 1/4 or more and less than 1/2 of the outer peripheral portion of the _second flange portion 12 _2. It is good.
Moreover, although the removable part 13 was provided with the 1st and 2nd part, the 1st part does not need to be. In this case, it is not necessary to form a recess in the belt hook portion 11.

Next, a split pulley 50 according to a second embodiment of the present invention will be described with reference to FIGS.
In the following, the center side, the outer periphery side, the radial direction and the circumferential direction of the split pulley 50 when the split pulley 50 is viewed in the direction perpendicular to the plane of FIG. 10 are “center side”, “outer side”, “radial direction”. And “circumferential direction”, respectively. Also, the direction perpendicular to the plane of FIG. 10 is referred to as the “axial direction”.

The split pulley 50 according to the present embodiment is used when two V-belts are used for the same purpose, and has a collar portion (middle) other than the collar portion (left collar portion 52 _L ) on the device side such as a motor. The flange portion 52 _C and the right flange portion 52 _R ) are formed so as to be removable.

That is, as shown in FIG. 10 and FIGS. 11A to 11C, the split pulley 50 includes a left block 50 _L , a middle block 50 _C , a right block 50 _R , a middle block 50 _C and a right block. First to fourth fixing bolts 55 _{1 to} 55 ₄ (sewing bolts) for attaching 50 _R to the left block 50 _L , a shaft fixing portion 56, and a shaft fixing bolt 57 are provided.

Here, as shown in FIG. 11 (a), the left block _50L has a cylindrical left belt hook _51L and a left side of the left belt hook _{51L on} the device side (the left side). and a is belt receiving portion 51 _L integrally formed Hidaritsuba section 52 _L.
Medium Block 50 _C, as shown in FIG. 11 (b), the cylindrical right and belt receiving portion 51 _R, right belt receiving portion 51 _R integrally formed on the side surface of the device side of the right belt receiving portion 51 _R The middle collar portion 52 _C formed and the first and second middle protrusions 53 _C1 formed integrally with the middle collar portion 52 _C so as to face each other on the center side of the side surface of the middle collar portion 52 _{C on} the device side. , 53 _C2 .
Right block 50 _R, as shown in FIG. 11 (c), Migitsubabu 52 _R and, Migitsuba portion 52 _R and integrally so as to face each other toward the center of the device side of the side surface of the Migitsubabu 52 _R The first and second right protrusions 53 _{R 1} and 53 _{R 2} (see FIG. 10) are formed.
Note that the same as the diameters of the right belt receiving portion 51 _R of the left belt receiving portion 51 _L.

Hidaritsuba portion 52 _L of the left block 50 _L has a disc shape, the diameter of Hidaritsuba portion 52 _L is larger than the diameter of the left belt receiving portion 51 _L. Also, run-off portions than the left belt receiving portion 51 _L of the side surface of the left belt receiving portion 51 _L side of Hidaritsuba portion 52 _L is a slope so as to form a groove for applying a left V-belt.
First and second middle protrusions 53 _C1 and 53 _C2 of the middle block 50 _C are respectively fitted on the side of the left block 50 _L opposite to the device of the left belt hook 51 _L. Left insertion holes 54 _L1 and 54 _L2 are formed.
The shaft fixing portion 56 is Hidaritsuba portion 52 _L and integrally formed on the device side surface of the Hidaritsuba portion 52 _L of the left block 50 _L.

Intermediate flange section 52 _C of the middle block 50 _C has a disc shape, the diameter of the intermediate flange section 52 _C is larger than the diameter of the right belt receiving portion 51 _R. The right belt receiving portion 51 run-off portions than _R of the device side surface of the intermediate flange section 52 _C is a slope so as to form a groove for applying a left V-belt. Similarly, device opposite the right belt receiving portion 51 run-off portions than _R side of the intermediate flange section 52 _C is a slope so as to form a groove for applying a right V-belt.
First and second right protrusions 53 _R1 and 53 _R2 of the right block 50 _R are respectively fitted on the side of the middle block 50 _C opposite to the device of the right belt hook 51 _R. Middle fitting holes 54 _C1 and 54 _C2 are formed.

Left belt hanging part 51 _L and port part 52 _{L of} left block 50 _L , right belt hanging part 51 _R and middle part 52 _{C of} middle block 50 _C , starboard part 52 _R of right block 50 _R and shaft fixing part As shown by broken lines in FIGS. 11A to 11C, a shaft through-hole for penetrating a device shaft (such as an output shaft of a motor) is formed in the central portion of 56.
Also, split pulley 50, the shaft through-hole of the shaft fixing portion 56 of the instrument shaft, the shaft through-hole of the Hidaritsuba portion 52 _L, the left belt receiving portion 51 _L axis through hole of the shaft through the intermediate flange section 52 _C After passing through the hole, the shaft through hole of the right belt hook portion 51 _{R and} the shaft through hole of the starboard portion 52 _R in this order, the shaft fixing bolt 57 is screwed into the screw hole formed in the shaft fixing portion 56. The shaft fixing bolt 57 is attached to the device shaft by engaging the tip of the shaft fixing bolt 57 with a key groove formed on the device shaft.

Left belt hanging part 51 _L and port part 52 _{L of} left block 50 _L , right belt hanging part 51 _R and middle part 52 _{C of} middle block 50 _C , starboard part 52 _R of right block 50 _R and shaft fixing part As shown by broken lines in FIGS. 11A to 11C, the middle block 50 _C and the right block 50 _R are moved to the left block 50 by the _{first to fourth} fixing bolts 55 _{1 to} 554. First to fourth screw holes for attachment to _L are formed (see FIG. 10).

Next, a procedure for removing the left V belt and the right V belt from the split pulley 50 will be described.
The worker removes the _{first to fourth} fixing bolts 55 _{1 to} 554 after stopping the device having the split pulley 50 attached to the shaft.
Subsequently, the worker removes the right block 50 _R from the middle block 50 _C, and then pulls the right V belt forward (opposite to the device) to remove the right V belt from the split pulley 50.
Subsequently, the worker removes the middle block 50 _C from the left block 50 _L, and then pulls the left V-belt forward (opposite to the device) to remove the left V-belt from the split pulley 50.
As a result, the left V belt and the right V belt can be easily detached from the split pulley 50, and the left V belt and the right V belt are removed without applying unnecessary tension to the left V belt and the right V belt. be able to.

Next, a procedure for attaching a new left V belt and a new right V belt to the split pulley 50 instead of the left V belt and the right V belt removed as described above will be described.
The worker hangs the new left V belt on the left belt hook 51 _L of the left block 50 _L , and then attaches the first and second middle protrusions 53 _C1 and 53 _C2 of the middle block 50 _C to the left block 50 _L. The middle block 50 _C is attached to the left block 50 _L by fitting into the first and second left insertion holes 54 _L1 and 54 _L2 respectively.
Subsequently, workers, after subjected to the right belt receiving portion 51 _R of the middle blocks 50 _C a new right V-belt, the middle and the right block 50 first and second right protrusions 53 of the _{R R1,} 53 _R2 block and respectively inserted in the 50 first and second inside insertion hole 54 _C1 of _C, 54 _C2, attaching the right block 50 _R in the middle block 50 _C.
In this way, the first and second middle protrusions 53 _C1 and 53 _C2 are inserted into the first and second left insertion holes 54 _L1 and 54 _L2 , respectively, and the first and second right protrusions 53 _{R 1} and 53 are inserted. _{When R 2} is inserted into the first and second intermediate insertion holes 54 _C1 and 54 _C2 and the middle block 50 _C and the right block 50 _R are attached to the left block 50 _L , the split pulley 50 is rotated. The idle rotation of the middle block 50 _C and the right block 50 _R can be prevented.
Subsequently, the worker fixes the middle block 50 _C and a right block 50 _R to the left block 50 _L with first to fourth fastening bolt 55 _to 554 _4.
As a result, the new left V belt and the new right V belt can be easily attached to the split pulley 50, and the new left V belt and the new right V belt themselves can be renewed without applying unnecessary tension. A new left V-belt and a new right V-belt can be installed.

In the above, an example in which the diameters of the belt hooking portions (the left belt hooking portion 51 _L and the right belt hooking portion 51 _R ) are the same has been described, but a plurality of blocks with different belt hooking portion diameters should be prepared. Thus, the torque can be varied.

It is a figure which shows the structure of the split-type pulley 10 by 1st Example of this invention, (a) is a front view, (b) is a left view. It is a figure for demonstrating the procedure when removing the V belt 20 hung between the split pulley 10 on the drive side and the pulley 21 on the load side, (a) is a front view, (b) is It is a top view. It is a figure for demonstrating the procedure when removing the V belt 20 hung between the split pulley 10 on the drive side and the pulley 21 on the load side, (a) is a front view, (b) is It is a top view. It is a figure for demonstrating the procedure when removing the V belt 20 hung between the split pulley 10 on the drive side and the pulley 21 on the load side, (a) is a front view, (b) is It is a top view. It is a figure for demonstrating the procedure when removing the V belt 20 hung between the split pulley 10 on the drive side and the pulley 21 on the load side, (a) is a front view, (b) is It is a top view. It is a figure for demonstrating the procedure when attaching new V belt 20 'between the split-type pulley 10 and the pulley 21, (a) is a front view, (b) is a top view. It is a figure for demonstrating the procedure when attaching new V belt 20 'between the split-type pulley 10 and the pulley 21, (a) is a front view, (b) is a top view. It is a figure for demonstrating the procedure when attaching new V belt 20 'between the split-type pulley 10 and the pulley 21, (a) is a front view, (b) is a top view. It is a figure for demonstrating the procedure when attaching new V belt 20 'between the split-type pulley 10 and the pulley 21, (a) is a front view, (b) is a top view. It is a front view which shows the structure of the split-type pulley 50 by the 2nd Example of this invention. Left block 50 _L of split pulley 50 shown in FIG. 10 comprises a left side view showing the structure of the middle block 50 _C and a right block 50 _R.

Explanation of symbols

10,50 split pulley 11 belt receiving portion 12 _1, 12 ₂ first and second flange portions 13 detachable portion 13a stepped 14 _{1-14 3} first to third fixing bolts 15,56 axial lock 16, 57 Axle fixing bolt 20, 20 ′ V belt 21 Pulley 22 Snap roller 50 _L Left block 50 _C Middle block 50 _R Right block 51 _L Left belt hook 51 _R Right belt hook 52 _L Left hook 52 _C Middle hook 52 _R starboard portion 53 _C1 , 53 _C2 first and second middle projections 53 _R1 , 53 _R2 first and second right projections 54 _L1 , 54 _L2 first and second left insertion holes 54 _C1 , 54 _C2 first First and second intermediate fitting holes 55 _{1 to} 55 ₄ First to fourth fixing bolts

Claims (1)

A split pulley (50) attached to the shaft of the device,
A left block (50 _L ), a middle block (50 _C ) and a right block (50 _R );
The left block includes a cylindrical left belt hanging portion (51 _L ) and a left collar portion (52 _L ) formed integrally with the left belt hanging portion on a side surface of the left belt hanging portion on the device side. ,
The middle block includes a cylindrical right belt hanging portion (51 _R ) and a middle collar portion (52 _C ) formed integrally with the right belt hanging portion on a side surface of the right belt hanging portion on the device side. ,
The right block comprises a starboard (52 _R );
A plurality of fixing bolts (55 ₁₎ are provided on an outer peripheral side of the left belt hanging part and the left side of the left block, the right belt hanging part and the middle side of the middle block, and the right side of the right block. To 55 ₄ ), a plurality of screw holes for attaching the middle block and the right block to the left block are formed,
First and second middle protrusions (53 _C1 , 53 _C2 ) formed integrally with the middle collar so that the middle block faces the center side of the side surface of the middle collar on the device side Further comprising
First and second right protrusions (53 _R1 , 53 _R2 ) formed integrally with the starboard portion so that the right block faces the center side of the side surface of the starboard portion on the device side Further comprising
First and second left insertion holes (54 _L1 ,...) In which the first and second middle protrusions of the middle block are respectively fitted on the side of the left belt of the left block opposite to the device. 54 _L2 ) is formed,
First and second intermediate fitting holes (54 _C1 ,...) In which the first and second right protrusions of the right block are respectively fitted on the side of the middle block opposite to the device of the right belt hanging portion. 54 _C2 ) is formed,
This is a split pulley.