JP2007002922A - Alignment adjusting mechanism, alignment adjusting method, and alignment adjustment assisting tool for pulley - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adjust the alignment of a pulley by merely performing a simple operation. <P>SOLUTION: This alignment adjusting mechanism 42 is supported on an non-rotatably installed pivot shaft 21 through a roller bearing 22 to adjust the alignment of the idler pulley 23 around which a transmission belt is wrapped. The mechanism 42 comprises a pair of washers 43 and 44 disposed on both sides of the idler pulley 23 on the pivot shaft 21, a pair of auxiliary washers 48 and 49 disposed between the idler pulley 23 and the washers 43 and 44 on the pivot shaft 21, and a bolt 54 functioning as the pivot shaft 21 and fastening the inner ring of the roller bearing 22, both washers 43 and 44, and both auxiliary washers 48 and 49 to a cylinder block 16. Further, a recessed part 47 having a paraboloid of revolution is formed in each of the washers 43 and 44, and a projected part 52 having a paraboloid of revolution and engaged with the recessed part 47 is formed on each of the auxiliary washers 48 and 49. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mechanism for adjusting the alignment of a pulley around which a transmission belt is wound, a method for adjusting, and an adjustment aid suitable for use in the adjustment.

  For example, various on-board engines are attached to an in-vehicle engine, and pulleys are respectively attached to a rotation shaft of these auxiliary machines and a crankshaft that is an output shaft of the engine. An endless transmission belt is wound around these pulleys. The rotation of the crankshaft is transmitted to each auxiliary machine via the pulley and the transmission belt, and the auxiliary machine is driven. Furthermore, an idler pulley, a tensioner, etc. are attached to the engine. The idler pulley guides the transmission belt so as to ensure a sufficient winding angle of the transmission belt with respect to the pulley such as the auxiliary machine and to ensure transmission of the driving force. The tensioner includes a pulley, and the tension of the transmission belt is adjusted through the pulley.

  In such an engine, if there is a pulley that is not properly aligned, that is, if there is a pulley whose center line is not parallel (inclined) to the center line of other pulleys, the transmission belt will be inclined with respect to that pulley. Wrapped. If the transmission belt circulates in this state, there is a risk that abnormal noise may be generated due to friction between the transmission belt and the inclined pulley, or the transmission belt may be unevenly worn.

Therefore, various techniques for adjusting the alignment of the pulley so that the center line of the inclined pulley is parallel to the center line of another pulley have been proposed. For example, in Patent Document 1, in the case where the auxiliary machine is arranged in parallel and relatively movable with respect to the engine, when adjusting the alignment of the pulley of the auxiliary machine, the center line of the pulley of the auxiliary machine is the crank pulley of the engine. The auxiliary machine is moved using a dedicated alignment adjustment jig so as to be parallel to the center line.
JP-A-8-285052

  However, the technique described in the above-mentioned Patent Document 1 moves the auxiliary machine with the pulley attached to the rotating shaft relative to the engine using the alignment adjustment jig, so that the pulley of the auxiliary machine is moved. The alignment is adjusted, and the adjustment work becomes large and troublesome. In this respect, if the alignment can be adjusted by changing the inclination of only the pulley or the vicinity thereof, the above-described large-scale adjustment work performed by relatively moving the entire auxiliary machine becomes unnecessary, and the troublesome work can be simplified. I can expect.

  The present invention has been made in view of such circumstances, and an object of the present invention is to make it possible to adjust the alignment of the pulleys only by performing a simple operation.

In the following, means for achieving the above object and its effects are described.
The invention according to claim 1 is a mechanism for adjusting the alignment of a pulley that is supported via a bearing on a support shaft that is non-rotatable on a fixed member, and on which a transmission belt is wound. A pair of washers disposed on both sides of the pulley on the support shaft, and a fastening means for fastening the inner ring of the bearing and the washers to the fixing member, and one of the washers and the inner ring of the bearing It is assumed that a concave portion having a rotational paraboloid is provided, and a projection having a rotational paraboloid and engaging with the concave portion is provided on the other side.

  In a second aspect of the present invention, there is provided a mechanism for adjusting the alignment of a pulley that is supported via a bearing on a support shaft that is non-rotatable on a fixed member, and on which a transmission belt is wound. A pair of washers disposed on both sides of the pulley on the support shaft, a pair of auxiliary washers disposed between the pulley and the washers on the support shaft, an inner ring of the bearing, the washers, and the Fastening means for fastening both auxiliary washers to the fixing member, one of each of the washers and each of the auxiliary washers is provided with a recess having a rotary paraboloid, and the other has a rotary paraboloid, Further, it is assumed that a protrusion that engages with the recess is provided.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the fastening means is constituted by a bolt that functions as the support shaft and is screwed into the fixing member.

  In the alignment adjusting mechanism having the configuration described in claim 1, each washer and the inner ring of the bearing are engaged with each other on the rotary paraboloids of the recess and the protrusion. The degree of engagement (engagement force) between the recess and the protrusion changes according to the state of fastening by the fastening means.

  In a state where the inner ring and both washers of the bearing are not fastened to the fixing member by the fastening means, the engagement force between the recess and the protrusion is weak. Therefore, it becomes possible to adjust the alignment of the pulley by tilting the inner ring along the rotating paraboloid of the washer. On the other hand, in a state where the inner ring and both washers are fastened to the fixing member by the fastening means, the engaging force between the recess and the protrusion is strong. Therefore, it becomes impossible to adjust the alignment of the pulley by tilting the inner ring along the rotating paraboloid of the washer.

  Therefore, by operating the alignment adjusting mechanism, it is possible to adjust the pulley alignment as follows. First, the inner ring of the bearing and both washers are not fastened to the fixing member by the fastening means. By doing so, the engaging force between the recess and the protrusion is weakened. The pulley is adjusted by tilting the inner ring along the paraboloid of the washer. After this adjustment, the inner ring and both washers are fastened to the fixing member by fastening means. By this fastening, the engagement force between the recess and the protrusion is strengthened, and it becomes impossible to tilt the inner ring along the paraboloid of revolution.

  Therefore, the pulley alignment can be appropriately adjusted by appropriately tilting the inner ring before the fastening by the fastening means. Then, by performing the fastening by the fastening means, the pulley can be held in the above state in which the alignment is appropriately adjusted.

Thus, according to the first aspect of the invention, the pulley alignment can be adjusted by simply performing a simple operation on the alignment adjusting mechanism.
When the auxiliary washer is arranged between the pulley on the spindle and each washer as in the second aspect of the invention, the auxiliary washer is the same as the inner ring of the bearing in the first aspect of the invention. Demonstrate the effect. For this reason, the same effect as that of the first aspect of the invention can be obtained by the second aspect of the invention.

  In this case, in the alignment adjusting mechanism, each washer and an auxiliary washer that replaces the inner ring of the bearing are engaged with each other on the rotary paraboloids of the recess and the protrusion. When the fastening means is not fastened and the engaging force between the recess and the projection is weak, the alignment of the pulley is adjusted by tilting the auxiliary washer along the paraboloid of the washer. .

Moreover, the said fastening means may be comprised with the volt | bolt which functions as the said spindle and is screwed into the said fixing member, according to the invention of Claim 3.
According to the third aspect of the present invention, when the bolt is loosened, the inner ring and both washers of the bearing are not fastened to the fixing member, and the engaging force between the recess and the protrusion is weak. Therefore, it is possible to adjust the alignment of the pulley by tilting the bearing along the rotary paraboloid of the washer. On the other hand, in a state where the bolt is tightened, the inner ring and both washers are fastened to the fixing member, and the engaging force between the recess and the protrusion is strong. Therefore, it is impossible to adjust the pulley alignment by tilting the bearing along the rotating paraboloid of the washer.

  Therefore, when adjusting the alignment of the pulley, the engagement force between the recess and the projection is weakened by the state before the bolt is tightened, that is, the state where the inner ring and both washers of the bearing are not fastened to the fixing member. The pulley is adjusted by tilting the inner ring along the paraboloid of the washer. After this adjustment, the bolt is tightened, and the inner ring of the bearing and both washers are fastened to the fixing member. By this fastening, the engaging force between the recess and the protrusion is strengthened, and it becomes impossible to tilt the inner ring along the paraboloid of revolution, and the pulley is held in the state where the alignment is adjusted.

  Therefore, if the inner ring is tilted properly and the pulley alignment is adjusted properly when the bolt is loosened, the pulley is brought into the above-mentioned state where the alignment is adjusted properly by tightening the bolt. Can be held.

  According to a fourth aspect of the present invention, there is provided a mechanism for adjusting the alignment of a pulley that is supported on a support shaft provided to be rotatable integrally with a rotary shaft and on which a transmission belt is wound. A recess having a paraboloid on one of the washers and the pulley, and a pair of washers disposed on both sides of the pulley, and fastening means for fastening the pulley and both washers to the rotating shaft. , And the other has a paraboloid and a protrusion that engages with the recess.

  According to a fifth aspect of the present invention, there is provided a mechanism for adjusting the alignment of a pulley that is supported on a support shaft provided so as to be integrally rotatable with a rotation shaft and on which a transmission belt is wound. A pair of washers disposed on both sides of the pulley, a pair of auxiliary washers disposed between the pulley and the washers on the support shaft, and the pulley, the washers, and the auxiliary washers that rotate. A fastening means for fastening to the shaft, and one of each of the washers and each of the auxiliary washers is provided with a recess having a rotational paraboloid, and the other has a rotation paraboloid and is engaged with the recess. It is assumed that a protruding portion is provided.

  In the invention described in claim 6, in the invention described in claim 4 or 5, it is assumed that the fastening means is constituted by a bolt that functions as the support shaft and is screwed into the rotating shaft.

  In the alignment adjusting mechanism having the configuration described in claim 4, the washers and the pulleys are engaged with each other on the rotary paraboloids of the recess and the protrusion. The degree of engagement (engagement force) between the recess and the protrusion changes according to the state of fastening by the fastening means.

  When the pulley and both washers are not fastened to the rotating shaft by the fastening means, the engagement force between the rotating paraboloid of the recess and the rotating paraboloid of the protrusion is weak. Therefore, it is possible to adjust the alignment by tilting the pulley along the rotating paraboloid of the washer. On the other hand, in a state where the pulley and both washers are fastened to the rotating shaft by the fastening means, the engaging force between the recess and the protrusion is strong. For this reason, it is impossible to adjust the alignment by tilting the pulley along the rotating paraboloid of the washer.

  Therefore, by operating the alignment adjusting mechanism, it is possible to adjust the pulley alignment as follows. First, the pulley and both washers are not fastened to the rotating shaft by the fastening means. By doing so, the engaging force between the recess and the protrusion is weakened. By adjusting the pulley along the paraboloid of the washer, the alignment of the pulley is adjusted. After this adjustment, the pulley and both washers are fastened to the rotating shaft by fastening means. By this fastening, the engaging force between the recess and the protrusion is strengthened, and it becomes impossible to tilt the pulley along the rotary paraboloid.

  Therefore, by appropriately tilting the pulley before fastening by the fastening means, the pulley can be held in a state in which the alignment is properly adjusted after fastening by the fastening means.

Thus, according to the fourth aspect of the present invention, the pulley alignment can be adjusted only by performing a simple operation.
When the auxiliary washer is arranged between the pulley on the support shaft and each washer as in the invention described in claim 5, the auxiliary washer has the same function as the pulley in the invention described in claim 4. Demonstrate. For this reason, the same effect as that of the invention according to claim 4 can be obtained by the invention of claim 5.

  In this case, in the alignment adjustment mechanism, each washer and an auxiliary washer that replaces the pulley are engaged with each other on the paraboloids of the recess and the protrusion. When the fastening means is not fastened and the engaging force between the recess and the projection is weak, the alignment of the pulley is adjusted by tilting the auxiliary washer along the paraboloid of the washer. .

Moreover, the said fastening means may be comprised with the volt | bolt which functions as the said spindle and is screwed in to the said rotating shaft like the invention of Claim 6.
In the state where the bolt is loosened, the pulley and both washers are not fastened to the rotating shaft, and the engaging force between the rotating paraboloid of the recess and the rotating paraboloid of the protrusion is weak. Therefore, it is possible to adjust the alignment by tilting the pulley along the rotating paraboloid of the washer. On the other hand, in the state where the bolt is tightened, the pulley and both washers are fastened to the rotating shaft, and the engaging force between the recess and the protrusion is strong. For this reason, it is impossible to adjust the alignment by tilting the pulley along the rotating paraboloid of the washer.

  Therefore, when adjusting the alignment of the pulley, the engagement force between the concave portion and the protrusion is weakened in a state before the bolt is tightened, that is, in a state where the pulley and both washers are not fastened to the rotating shaft. The pulley is tilted along the rotating paraboloid of the washer to adjust the alignment. After this adjustment, the bolt is tightened, and the pulley and both washers are fastened to the rotating shaft. By this fastening, the engaging force between the concave portion and the protruding portion is increased, and the pulley cannot be tilted along the paraboloid of revolution, and the pulley is held in an adjusted alignment state.

  Therefore, if the pulley is properly tilted and the alignment is adjusted properly when the bolt is loosened, the bolt is held in the above-described state in which the alignment is properly adjusted by tightening the bolt. be able to.

  In invention of Claim 7, it is the method of adjusting the alignment of the pulley using the alignment adjustment mechanism of the pulley as described in any one of Claims 1-6, Comprising: Before fastening by the said fastening means, An alignment adjustment assisting tool having a flat adjustment surface is arranged so that the adjustment surface is orthogonal to the support shaft, and the alignment of the pulley is adjusted so that the side surface of the pulley is in surface contact with the adjustment surface, In this state, the fastening by the fastening means is performed.

  When adjusting the alignment of the pulley using the alignment adjusting mechanism according to any one of claims 1 to 6, before engaging with the fastening means, that is, the engaging force between the recess and the protrusion is weak. When the pulley can be tilted, the alignment adjustment assisting tool is arranged so that its planar adjustment surface is orthogonal to the pulley support shaft. Then, the pulley is tilted so that the side surface of the pulley is in surface contact with the adjustment surface. When the pulley tilts and its side surface comes into surface contact with the adjustment surface, the pulley alignment is properly adjusted.

  Fastening is performed by fastening means after the alignment is adjusted. By this fastening, the engaging force between the recess and the protrusion is strengthened, and the pulley is held in the above-described state in which the alignment is properly adjusted. Thus, according to the adjustment method of the invention described in claim 7, the alignment of the pulley can be adjusted only by performing a simple operation.

Then, by performing the above-described alignment adjustment operation for a plurality of pulleys, the center lines of the plurality of pulleys become parallel to each other, and there is no misalignment.
According to an eighth aspect of the present invention, there is provided an alignment adjustment assisting tool used in the pulley alignment adjustment method according to the seventh aspect, wherein the support shaft is brought into contact with a predetermined reference surface at one end surface. And an adjustment assisting member attached to the shaft portion and having an adjustment surface orthogonal to the coaxial portion.

  When adjusting the alignment of the pulley according to the adjustment method of the invention described in claim 7, before the fastening by the fastening means, that is, when the engagement force between the recess and the projection is weak and the pulley can be tilted. The alignment adjustment aid of the invention described in claim 8 is used as follows. By bringing one end face of the shaft portion into contact with a predetermined reference surface, the shaft portion is made parallel to the support shaft of the pulley. In this state, the adjustment surface of the adjustment auxiliary member attached to the shaft portion is in a state orthogonal to the pulley support shaft. Next, the adjustment surface of the adjustment auxiliary member is positioned in the vicinity of the side surface of the pulley, and the pulley is tilted so that the side surface of the pulley is in surface contact with the adjustment surface. When the side surface of the pulley comes into surface contact with the adjustment surface, the side surface is orthogonal to the support shaft. Further, the center line of the pulley coincides with or is parallel to the support shaft. In this way, the alignment of the pulley is adjusted. And if the said operation | work is performed about a some pulley, the centerline of those pulleys will become mutually parallel, and it will be in the state without an alignment shift | offset | difference.

According to a ninth aspect of the present invention, in the eighth aspect of the invention, the adjustment assisting member is rotatably attached to the shaft portion.
According to the above configuration, after the one end surface of the shaft portion is brought into contact with the reference surface, the adjustment assisting member is rotated around the shaft portion, so that the adjustment surface is reliably located near the side surface of the pulley. Will be able to be located.

  According to a tenth aspect of the present invention, in the invention according to the eighth or ninth aspect, a plurality of the adjustment auxiliary members are provided on the shaft portion, and the adjustment surface of each adjustment auxiliary member is relative to the shaft portion. It is assumed that they are formed on a common plane orthogonal to each other.

  According to said structure, since the adjustment auxiliary member is provided with two or more on the axial part, the adjustment surface of an adjustment auxiliary member can be arrange | positioned at once at the vicinity of the side surface of a some pulley. By tilting the plurality of pulleys so that their side surfaces come into surface contact with the corresponding adjustment surfaces, the alignment of the plurality of pulleys can be adjusted efficiently. In addition, about the some adjustment auxiliary member, since those adjustment surfaces are formed on the common plane orthogonal to an axial part, after the said alignment is adjusted, the side surface of several pulleys is the said common And their centerlines are parallel to each other.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment in which the present invention is embodied in an engine winding transmission device will be described with reference to FIGS.
The cylinder block of the engine is provided with a crankshaft as its output shaft. The engine is also equipped with auxiliary equipment such as an alternator, a water pump, and an air conditioner compressor. A winding transmission is provided to transmit the rotation of the crankshaft to each auxiliary machine for driving.

  1, 2, and 4 show a part of the winding transmission device 11. The winding transmission device 11 includes a crank pulley (not shown), a pulley 13 of an auxiliary machine 12, a pulley 14 and a transmission belt 15 of another auxiliary machine (not shown). The crank pulley is attached to the front end portion of the crankshaft protruding from the front surface (the left side surface in FIG. 4) of the cylinder block 16 so as to be integrally rotatable. The pulley 13 is attached to a support shaft 17 disposed in parallel to the crankshaft so as to be integrally rotatable. This mounting structure will be described later. The support shaft 17 is fastened to the rotating shaft 18 of the auxiliary machine 12 at one end thereof, and rotates together with the rotating shaft 18 (see FIG. 2). Reference numeral 19 in FIG. 2 denotes a bearing that supports the rotary shaft 18 on the case of the auxiliary machine 12. Although not shown, the pulley 14 is also attached to a support shaft that rotates integrally with the rotation shaft of the auxiliary machine, like the pulley 13.

  The transmission belt 15 is wound around the crank pulley and the pulleys 13 and 14 described above. Here, a V-ribbed belt is used as the transmission belt 15. 2 and 4, the core wire in the transmission belt 15 is not shown.

  Further, on the front surface of the cylinder block 16, a support shaft 21 is disposed in parallel with the crank pulley. The support shaft 21 is fixed to a cylinder block 16 as a fixing member at one end thereof, and is not rotatable unlike the support shaft 17 of the auxiliary machine 12 (see FIG. 4). An idler pulley 23 is rotatably supported on the support shaft 21 by a rolling bearing 22. The rolling bearing 22 includes an inner ring 24 and an outer ring 25 arranged concentrically with each other, and a rolling element 26 formed of a spherical body interposed between the inner and outer rings 24 and 25. The outer ring 25 is fitted and fixed to the idler pulley 23. The idler pulley 23 is for ensuring a sufficient winding angle of the transmission belt 15 with respect to the pulley 13 and the like of the auxiliary machine 12 to ensure transmission of the driving force.

  In the winding transmission device 11 having such a configuration, when the crankshaft rotates as the engine is operated, the rotation of the rotation shaft 18 of each auxiliary machine 12 is transmitted via the crank pulley, the transmission belt 15, the idler pulley 23, and the pulleys 13 and 14. Is transmitted to. In this transmission process, the transmission belt 15 circulates in the clockwise direction as indicated by an arrow in FIG.

  In the winding transmission device 11, if there is a pulley that is not properly aligned, that is, if there is a pulley whose center line is not parallel (inclined) to the center line of another pulley, the transmission belt 15 is inclined with respect to the pulley. It is wound in the state. If the transmission belt 15 circulates in this state, there is a possibility that abnormal noise is generated due to friction between the transmission belt 15 and the inclined pulley, or the transmission belt 15 is unevenly worn.

  Therefore, in this embodiment, a mechanism for adjusting the alignment of each pulley is provided for each pulley. Here, the alignment adjustment mechanism 27 of the pulley 13 of the auxiliary machine 12 and the alignment adjustment mechanism 42 of the idler pulley 23 will be described.

As shown in FIGS. 2 and 3, the former alignment adjusting mechanism 27 includes a pair of washers 28 and 29, a pair of auxiliary washers 34 and 35, and fastening means.
Both washers 28 and 29 are arranged on both sides of the pulley 13 on the support shaft 17 and have through holes 31 into which the support shaft 17 can be inserted. The surface 32 of each washer 28, 29 opposite to the pulley 13 is orthogonal to the through hole 31. The washer 29 on the auxiliary machine 12 side can be engaged with the end surface of the rotating shaft 18 at the surface 32 thereof. A recess 33 having a paraboloid of revolution is provided on the surface of each washer 28, 29 on the pulley 13 side.

  Each auxiliary washer 34, 35 is disposed on the support shaft 17 and between the pulley 13 and the washer 28, and has a through hole 36 through which the support shaft 17 can be inserted. On the opposite side of each auxiliary washer 34, 35 from the pulley 13, a protrusion 37 having a paraboloid of revolution is provided. The auxiliary washers 34 and 35 can be engaged with the recesses 33 of the washers 28 and 29 at the protrusion 37. Further, the surface 38 on the pulley 13 side of each auxiliary washer 34, 35 is orthogonal to the through hole 36, and the surface 38 can be engaged with the side surface of the central portion of the pulley 13.

  Further, the fastening means is constituted by a bolt 39. The bolt 39 includes a shaft portion 39A that functions as the support shaft 17 and a head portion 39B provided at one end of the shaft portion 39A. The shaft portion 39A is inserted through the through-hole 31 of the washer 28, the through-hole 36 of the auxiliary washer 34, the pulley 13, the through-hole 36 of the auxiliary washer 35, and the through-hole 31 of the washer 29 in this order. It is screwed into the provided bolt hole 41. The head 39 </ b> B can be engaged with the surface 32 of the washer 28.

  In the alignment adjusting mechanism 27 configured as described above, in a state before the bolt 39 is tightened, that is, in a loosened state, the pulley 13, both washers 28 and 29, and the auxiliary washers 34 and 35 are fastened to the rotary shaft 18. Therefore, the engagement force between the rotary paraboloid of the recess 33 and the rotary paraboloid of the protrusion 37 is weak. Therefore, the auxiliary washers 34 and 35 and the pulley 13 can be tilted along the paraboloids of the washers 28 and 29 to adjust the alignment of the pulley 13.

  On the other hand, in the state where the bolt 39 is tightened, the pulley 13, both washers 28, 29 and both auxiliary washers 34, 35 are fastened to the rotary shaft 18, and the engagement force between each recess 33 and each projection 37 is strong. . Therefore, it becomes impossible to adjust the alignment by tilting the auxiliary washers 34 and 35 and the pulley 13 along the paraboloids of the washers 28 and 29. The pulley 13 is integrated with the bolt 39, both washers 28 and 29, and both auxiliary washers 34 and 35, and rotates together with the rotary shaft 18 of the auxiliary machine 12.

As shown in FIGS. 4 and 5, the latter alignment adjusting mechanism 42 includes a pair of washers 43, 44, a pair of auxiliary washers 48, 49, and fastening means.
Both washers 43 and 44 are disposed on both sides of the idler pulley 23 on the support shaft 21 and have through holes 45 through which the support shaft 21 can be inserted. The surface 46 of each washer 43, 44 opposite to the idler pulley 23 is orthogonal to the through hole 45. The washer 44 on the cylinder block 16 side can be engaged with the front surface of the cylinder block 16 at the surface 46. Further, a recess 47 having a paraboloid of revolution is provided on the surface of each washer 43, 44 on the idler pulley 23 side.

  Each of the auxiliary washers 48 and 49 is disposed on the support shaft 21 and between the idler pulley 23 and the washers 43 and 44, and has a through hole 51 into which the support shaft 21 can be inserted. On the opposite side of each auxiliary washer 48, 49 from the idler pulley 23, a protrusion 52 having a paraboloid of revolution is provided. The auxiliary washers 48 and 49 can be engaged with the recesses 47 of the washers 43 and 44 at the projection 52. Further, the surface 53 on the idler pulley 23 side of each auxiliary washer 48, 49 is orthogonal to the through hole 51, and the surface 53 can be engaged with the side surface of the inner ring 24 of the rolling bearing 22. However, the surface 53 does not engage with the side surface of the outer ring 25.

  Further, the fastening means is constituted by a bolt 54. The bolt 54 includes a shaft portion 54A that functions as the support shaft 21 and a head portion 54B provided at one end of the shaft portion 54A. The shaft portion 54A is inserted through the cylinder block 16 in the order of the through hole 45 of the washer 43, the through hole 51 of the auxiliary washer 48, the inner ring 24 of the rolling bearing 22, the through hole 51 of the auxiliary washer 49, and the through hole 45 of the washer 44. It is screwed into the provided bolt hole 55. The head 54 </ b> B can engage with the surface 46 of the washer 43.

  In the alignment adjusting mechanism 42 configured as described above, in a state before the bolt 54 is tightened, that is, in a loosened state, the inner ring 24, both washers 43 and 44, and both auxiliary washers 48 and 49 of the rolling bearing 22 are cylinders. The engagement force between the rotation paraboloid of each recess 47 and the rotation paraboloid of each protrusion 52 is weak without being fastened to the block 16. Therefore, it is possible to adjust the alignment of the idler pulley 23 by tilting the auxiliary washers 48 and 49 and the rolling bearing 22 along the paraboloids of the washers 43 and 44.

  On the other hand, when the bolt 54 is tightened, the inner ring 24, both washers 43 and 44, and both auxiliary washers 48 and 49 of the rolling bearing 22 are fastened to the cylinder block 16 and cannot rotate. Further, in this state, the engaging force between each recess 47 and each protrusion 52 is strong. Therefore, it becomes impossible to adjust the alignment of the idler pulley 23 by tilting the auxiliary washers 48 and 49 and the rolling bearing 22 along the paraboloids of the washers 43 and 44. The idler pulley 23 can rotate around the shaft portion 54 </ b> A of the bolt 54 together with the outer ring 25.

Next, an alignment adjustment auxiliary tool 61 suitable for use in adjusting the alignment of the idler pulley 23 and the pulley 13 will be described with reference to FIGS.
The alignment adjustment assisting tool 61 includes a plurality of (here, two) shaft portions 62 and 63, a connecting member 64, and a plurality of (here, three) adjustment assisting members 67 to 69. Both shaft portions 62 and 63 are arranged in parallel with a predetermined distance from each other. End surfaces 62A and 63A of one of the shaft portions 62 and 63 (downward in FIG. 6B) are orthogonal to the shaft portions 62 and 63. These end surfaces 62A and 63A are surfaces that come into contact with the reference surface 66 of the cylinder block 16 during alignment adjustment. More specifically, adjustment bosses 65 are integrally provided at a plurality of locations (two locations in the figure) on the front surface of the cylinder block 16, and the support shafts are formed at the front ends thereof by a machining method such as cutting or grinding. The reference surface 66 orthogonal to the lines 17 and 21 is formed.

  The connecting member 64 has a long shape, and is fixed to the shaft portions 62 and 63 at both ends thereof. The adjustment auxiliary member 67 has a long shape and is rotatably attached to the shaft portion 62 at one end thereof. Each of the adjustment auxiliary members 68 and 69 has a long shape, and is rotatably attached to the shaft portion 63 at each one end portion. In each of the adjustment auxiliary members 67 to 69, an adjustment surface 71 is formed on at least a part of the surface on the cylinder block 16 side. These adjustment surfaces 71 are both located on a common plane P 1 orthogonal to the shaft portions 62 and 63. In order to employ such a configuration, the predetermined adjustment assisting member 69 is bent at an intermediate position 69A in the length direction.

  Next, a method for adjusting the alignment of each pulley using the alignment adjustment auxiliary tool 61 configured as described above will be described by taking the pulley 13 and the idler pulley 23 as an example.

  FIG. 8 shows a state before the alignment of the pulley 13 is adjusted. In this state, the center line L1 of the pulley 13 is slightly inclined with respect to the support shaft 17 (the shaft portion 39A of the bolt 39) due to dimensional tolerances of the pulley 13 and the components of the alignment adjusting mechanism 27. The dimensional tolerance here is mainly due to the fact that the recess 33 in each of the washers 28 and 29 is processed at a location slightly decentered with respect to the through hole 31.

  FIG. 9 shows a state before the alignment of the idler pulley 23 is adjusted. In this state, the center line L2 of the idler pulley 23 is slightly inclined with respect to the support shaft 21 (the shaft portion 54A of the bolt 54) due to dimensional tolerances of the idler pulley 23 and the components of the alignment adjusting mechanism 42 and the like. The dimensional tolerance here is mainly due to the fact that the recess 47 in each of the washers 43 and 44 is processed at a location slightly decentered with respect to the through hole 45.

  When adjusting the alignment of the pulley 13, the state before tightening the bolt 39, that is, the state in which the pulley 13, both washers 28 and 29, and both auxiliary washers 34 and 35 are not fastened to the rotary shaft 18, isher 28. 29 and the auxiliary washers 34, 35 are weakened in the engagement force between the recess 33 and the projection 37. In this state, the auxiliary washers 34 and 35 can be tilted along the paraboloid of the recess 33 in each of the washers 28 and 29.

  Further, when adjusting the alignment of the idler pulley 23, the state before the bolt 54 is tightened, that is, the inner ring 24, both washers 43, 44 and both auxiliary washers 48, 49 of the rolling bearing 22 are not fastened to the cylinder block 16. In this state, the engaging force between the recess 47 and the protrusion 52 in each washer 43, 44 and each auxiliary washer 48, 49 is weakened. In this state, the auxiliary washers 48 and 49 can be tilted along the paraboloid of the recess 47 in each of the washers 43 and 44.

  Next, as shown in FIGS. 6B and 7A, the end surfaces 62A and 63A of the shaft portions 62 and 63 of the alignment adjustment auxiliary tool 61 are brought into close contact with the reference surface 66 of the corresponding adjustment boss 65. Let Since the reference surface 66 is orthogonal to the support shafts 17 and 21 and the end surfaces 62A and 63A are orthogonal to the shaft portions 62 and 63, these end surfaces 62A and 63A are brought into close contact with the reference surface 66. The shaft portions 62 and 63 are parallel to the support shafts 17 and 21. Further, a planar adjustment surface 71 is formed on the adjustment auxiliary members 67 and 68 attached to the shaft portions 62 and 63, and these adjustment surfaces 71 are common planes orthogonal to the shaft portions 62 and 63. Located on P1. Therefore, as described above, when the end surfaces 62A and 63A are in close contact with the reference surface 66, the respective adjustment surfaces 71 are in a state orthogonal to the support shafts 17 and 21.

  Subsequently, as indicated by an arrow in FIG. 7A, the adjustment auxiliary member 68 is moved around the shaft portion 63 so that the adjustment surface 71 of the adjustment auxiliary member 68 is positioned in front of the side surface 13A of the pulley 13. Turn in the turning direction. Further, the adjustment assisting member 67 is rotated clockwise about the shaft portion 62 so that the adjustment surface 71 of the adjustment assisting member 67 is positioned in the vicinity of the front side of the side surface 23A of the idler pulley 23 (FIG. 7B). reference).

  8 and 9, the adjustment surfaces 71 of the adjustment auxiliary members 68 and 67 indicated by the two-dot chain lines are orthogonal to the support shafts 17 and 21, whereas the center line L <b> 1 of the pulley 13 and the idler pulley. The center line L2 of 23 is inclined with respect to the support shafts 17 and 21. Therefore, at this stage, the side surface 13 A of the pulley 13 does not come into surface contact with the adjustment surface 71 of the adjustment auxiliary member 68, and the side surface 23 A of the idler pulley 23 does not come into surface contact with the adjustment surface 71 of the adjustment auxiliary member 67.

  Furthermore, as described above, the engaging force between the recess 33 and the protrusion 37 is weak, and the auxiliary washers 34 and 35 can be tilted along the paraboloids of the washers 28 and 29. Further, since the engaging force between the recess 47 and the protrusion 52 is weak, the auxiliary washers 48 and 49 can be tilted along the paraboloids of the washers 43 and 44.

  Therefore, the alignment of the pulley 13 is adjusted such that the side surface 13A of the pulley 13 is in surface contact with the adjustment surface 71. This adjustment is realized by tilting the auxiliary washers 34 and 35 along the paraboloids of the washers 28 and 29. When the side surface 13A is in surface contact with the adjustment surface 71, the center line L1 of the pulley 13 is parallel to the support shaft 17 (including a match) (see FIG. 2). In this way, the alignment of the pulley 13 is adjusted appropriately.

  Further, the alignment of the idler pulley 23 is adjusted so that the side surface 23 </ b> A of the idler pulley 23 comes into surface contact with the adjustment surface 71. This adjustment is realized by tilting the auxiliary washers 48 and 49 along the paraboloids of the washers 43 and 44. When the side surface 23A is in surface contact with the adjustment surface 71, the center line L2 of the idler pulley 23 is parallel to the support shaft 21 (including a match) (see FIG. 4). In this way, the alignment of the idler pulley 23 is properly adjusted.

  After adjusting the alignment of the pulley 13 and the idler pulley 23, the bolt 39 is tightened, and the pulley 13, both washers 28, 29 and both auxiliary washers 34, 35 are fastened to the rotary shaft 18. As a result of this fastening, the engagement force between the recess 33 and the projection 37 is increased, and the auxiliary washers 34 and 35 cannot be tilted along the paraboloids of the washers 28 and 29, and the pulley 13 is adjusted for alignment. Is kept in the state. Further, the bolt 54 is tightened to fasten the inner ring 24, both washers 43, 44 and both auxiliary washers 48, 49 of the rolling bearing 22 to the cylinder block 16. As a result of this fastening, the engagement force between the recesses 47 and the protrusions 52 is strengthened, making it impossible to tilt the auxiliary washers 48 and 49 along the rotational paraboloids of the washers 43 and 44, and the idler pulley 23 is aligned. Is maintained in an adjusted state.

  As a result, the side surface 13A of the pulley 13 and the side surface 23A of the idler pulley 23 are located on a common plane P1, and the center line L1 of the pulley 13 and the center line L2 of the idler pulley 23 are parallel to each other. The transmission belt 15 is wound around the pulley 13 and the idler pulley 23 after the alignment is adjusted, and the transmission belt 15 is inclined with respect to the pulley 13 and the idler pulley 23. It is never wrapped.

  When the transmission belt 15 is circulated, the lap is transmitted to the pulley 13, the idler pulley 23, and the like. By this transmission, the pulley 13, the bolt 39, both washers 28, 29 and both auxiliary washers 34, 35 rotate integrally with the rotary shaft 18, and the auxiliary machine 12 is driven. Further, the idler pulley 23 rotates about the support shaft 21. At this time, since the transmission belt 15 is not wound in an inclined state with respect to the idler pulley 23 and the pulley 13 as described above, abnormal noise due to friction between the transmission belt 15 and the idler pulley 23, Phenomenon in which abnormal noise due to rubbing with the pulley 13 or uneven transmission of the transmission belt 15 does not occur easily.

According to the embodiment described in detail above, the following effects can be obtained.
(1) A pair of washers 28 and 29 are arranged on both sides of the pulley 13 on the support shaft 17 as the alignment adjusting mechanism 27 of the pulley 13 that transmits the rotational force to the auxiliary machine 12, and each washer 28 and 29 and the pulley 13 Auxiliary washers 34, 35 are arranged between the two. A concave portion 33 having a parabolic surface is provided on each of the washers 28 and 29, while a protrusion 37 having a rotary parabolic surface and engaging with the concave portion 33 is provided on each of the auxiliary washers 34 and 35. Further, the pulley 13, both washers 28 and 29, and both auxiliary washers 34 and 35 are fastened to the rotary shaft 18 by bolts 39.

  Therefore, by loosening the bolt 39 and weakening the engagement force between the recess 33 and the protrusion 37, the alignment adjusting mechanism 27 can tilt the auxiliary washers 34, 35 along the paraboloids of the washers 28, 29. The pulley 13 can be adjusted in alignment.

  Further, by tightening the bolt 39 to increase the engagement force between the recess 33 and the protrusion 37, the alignment adjustment mechanism 27 can tilt the auxiliary washers 34 and 35 along the paraboloids of the washers 28 and 29. Is not possible, and the adjustment of the alignment of the pulley 13 is impossible.

  (2) As an alignment adjusting mechanism 42 for the idler pulley 23, a pair of washers 43, 44 are arranged on both sides of the idler pulley 23 on the support shaft 21, and auxiliary washers are provided between the washers 43, 44 and the idler pulley 23. 48 and 49 are arranged. A recess 47 having a paraboloid is provided on each washer 43, 44, while a protrusion 52 having a paraboloid and engaging with the recess 47 is provided on each auxiliary washer 48, 49. Further, the inner ring 24, both washers 43, 44 and both auxiliary washers 48, 49 of the rolling bearing 22 are fastened to the cylinder block 16 by bolts 54.

  Therefore, by loosening the bolt 54 and weakening the engagement force between the recess 47 and the protrusion 52, the alignment adjustment mechanism 42 can tilt the auxiliary washers 48, 49 along the paraboloid of the washers 43, 44. The idler pulley 23 can be adjusted in alignment.

  Further, by tightening the bolt 54 and strengthening the engagement force between the recess 47 and the protrusion 52, the alignment adjusting mechanism 42 can tilt the auxiliary washers 48 and 49 along the paraboloids of the washers 43 and 44. It is impossible to adjust the alignment of the idler pulley 23.

  (3) When adjusting the alignment of the pulley 13 and the idler pulley 23, the alignment adjusting mechanisms 27 and 42 are in a state in which the above-described auxiliary washers 34, 35, 48, 49, etc. can be tilted to assist the alignment adjustment. The tool 61 is arranged so that its adjustment surface 71 is orthogonal to the support shaft 17 of the pulley 13 and the support shaft 21 of the idler pulley 23. The alignment of the pulley 13 is adjusted so that the side surface 13A is in surface contact with the adjustment surface 71, and the alignment of the idler pulley 23 is adjusted so that the side surface 23A is in surface contact with the adjustment surface 71. Therefore, by bringing the side surface 13 </ b> A into surface contact with the adjustment surface 71, the center line L <b> 1 of the pulley 13 can be parallel to the support shaft 17 (including a match), and the alignment can be adjusted appropriately. Further, by bringing the side surface 23 </ b> A into surface contact with the adjustment surface 71, the center line L <b> 2 of the idler pulley 23 can be parallel to the support shaft 21 (including a match) and the alignment can be adjusted appropriately. The center lines L1 and L2 can be parallel to each other to eliminate misalignment.

  (4) After adjusting the alignment in (3) above, the bolt 39 is tightened, and the pulley 13, both washers 28, 29 and both auxiliary washers 34, 35 are fastened to the rotary shaft 18. This fastening increases the engagement force between the recess 33 and the protrusion 37, disables the tilting of the auxiliary washers 34 and 35 along the paraboloid of revolution, and holds the pulley 13 in a state in which the alignment is properly adjusted. Can do.

  Further, after the alignment is adjusted in the above (3), the bolt 54 is tightened, and the inner ring 24, both washers 43, 44 and both auxiliary washers 48, 49 are fastened to the cylinder block 16. This fastening increases the engagement force between the recess 47 and the protrusion 52, disables the tilting of the auxiliary washers 48 and 49 along the paraboloid of revolution, and holds the idler pulley 23 in a state in which the alignment is properly adjusted. be able to.

  (5) As the alignment adjustment auxiliary tool 61, shaft portions 62 and 63 arranged in parallel to the support shafts 17 and 21 by being brought into contact with the reference surface 66 of the adjustment boss 65 at the end surfaces 62A and 63A; What is provided with the adjustment auxiliary members 67-69 which are attached to the axial parts 62 and 63 and have the adjustment surface 71 orthogonal to the coaxial parts 62 and 63 is used.

  Therefore, the side surface 13A of the pulley 13 is brought into surface contact with the adjustment surface 71 of the adjustment auxiliary member 68, and the side surface 23A of the idler pulley 23 is brought into surface contact with the adjustment surface 71 of the adjustment auxiliary member 67, whereby the both side surfaces 13A, 23A are brought into contact with each other. It can be located on a common plane P1 orthogonal to the support shafts 17 and 21.

  (6) In the alignment adjustment auxiliary tool 61, the adjustment auxiliary member 67 is rotatably attached to the shaft portion 62, and the adjustment auxiliary members 68 and 69 are rotatably attached to the shaft portion 63. Therefore, after adjusting the end surfaces 62A and 63A of the shaft portions 62 and 63 to the reference surface 66, the adjustment auxiliary members 67 to 69 are rotated around the shaft portions 62 and 63, thereby adjusting the adjustment surface 71. Can be reliably positioned near the front side of the side surface 13A of the pulley 13 or near the front side of the side surface 23A of the idler pulley 23.

  (7) A plurality of adjustment assisting members 68 and 69 are mounted on the shaft portion 63. Therefore, the alignment of the plurality of pulleys 13 and 14 can be efficiently adjusted by the plurality of adjustment assisting members 68 and 69.

Note that the present invention can be embodied in another embodiment described below.
In the alignment adjustment mechanism 27, the concave portion 33 having a rotation paraboloid may be provided in the auxiliary washers 34 and 35, and the protrusion 37 having the rotation paraboloid may be provided in the washers 28 and 29.

  Similarly, in the alignment adjusting mechanism 42, the recess 47 having a paraboloid of revolution may be provided in the auxiliary washers 48 and 49, and the protrusion 52 having the paraboloid of revolution may be provided in the washers 43 and 44.

  In the above embodiment, the auxiliary washers 34 and 35 in the alignment adjustment mechanism 27 are configured by a member different from the pulley 13, but they may be provided integrally. In this case, for example, a protrusion having a paraboloid of revolution is integrally formed on the side surface of the pulley 13.

  Similarly, in the above-described embodiment, the auxiliary washers 48 and 49 in the alignment adjusting mechanism 42 are configured by members different from the inner ring 24 of the rolling bearing 22, but they may be provided integrally. In this case, for example, a protrusion having a paraboloid of revolution is integrally formed on the side surface of the inner ring 24.

  The auxiliary washers 34 and 35 in the alignment adjustment mechanism 27 may be omitted. In this case, for example, as shown in FIG. 10, concave portions 33 having a paraboloid of revolution are provided on both side surfaces of the pulley 13, and protrusions 37 having a paraboloid of revolution and engaging with the respective concave portions 33 are provided. The washers 28 and 29 may be provided. Contrary to this, although not shown, a recess 33 having a rotational paraboloid is provided in each of the washers 28 and 29, and a protrusion 37 having a rotational paraboloid and engaging with the recess 33 is provided in the pulley 13. It may be provided on both side surfaces. In these cases, the same operations and effects as those of the above embodiment can be obtained with a small number of parts. In FIG. 10, members similar to those in the above embodiment are given the same reference numerals.

  Similarly, the auxiliary washers 48 and 49 in the alignment adjustment mechanism 42 may be omitted. In this case, for example, as shown in FIG. 11, recesses 47 having a paraboloid of revolution are provided on both side surfaces of the inner ring 24 of the rolling bearing 22, and a projection having a paraboloid of revolution and engaging with the recess 47. 52 may be provided in each washer 43,44. Contrary to this, although not shown, a recess 47 having a paraboloid is provided in each washer 43, 44, and a protrusion 52 having a paraboloid and engaging with the recess 47 is provided on the inner ring 24. It may be provided on both side surfaces. In these cases, the same operations and effects as those of the above embodiment can be obtained with a small number of parts. In addition, in FIG. 11, the same code | symbol is attached | subjected about the member similar to the said embodiment.

-In the said embodiment, you may comprise a fastening means by the combination of a stud bolt and a nut.
In the above embodiment, the reference surface 66 may be formed at a location different from the cylinder block 16, for example, a cylinder head, a chain cover, or the like.

The present invention can also be applied to a pulley that uses a member different from the cylinder block 16 as a fixed member, and is supported via a bearing on a support shaft that is non-rotatably provided on the fixed member.
-In the alignment adjustment auxiliary tool 61, you may use a different number of axial parts and adjustment auxiliary members from the said embodiment.

  -You may make it adjust alignment of the pulley 13, the idler pulley 23, etc. using the alignment adjustment auxiliary tool of the form different from the alignment adjustment auxiliary tool 61 in the said embodiment. In short, the alignment adjustment auxiliary tool only needs to have an adjustment surface orthogonal to the support shafts 17 and 21.

The front view which shows a part of winding power transmission device in one Embodiment which actualized this invention. FIG. 2 is an enlarged sectional view taken along line 2-2 in FIG. 1. Sectional drawing which shows the state before attaching the alignment adjustment mechanism of the pulley in FIG. FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. Sectional drawing which shows the state before attaching the alignment adjustment mechanism of the idler pulley in FIG. (A) is a front view showing a part of the alignment adjustment aid omitted, (B) is a cross-sectional view taken along line bb in (A). (A), (B) is a front view which shows the state which adjusts each alignment of a pulley and an idler pulley using an alignment adjustment auxiliary tool. Sectional drawing which shows the state before adjusting the alignment of a pulley in the alignment adjustment mechanism of FIG. FIG. 5 is a cross-sectional view showing a state before adjusting the alignment of an idler pulley in the alignment adjustment mechanism of FIG. 4. Sectional drawing which shows another embodiment of an alignment adjustment mechanism. Sectional drawing which shows another embodiment of an alignment adjustment mechanism.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 12 ... Auxiliary machine, 13 ... Pulley, 13A, 23A ... Side surface, 15 ... Transmission belt, 16 ... Cylinder block (fixing member), 17, 21 ... Support shaft, 18 ... Rotary shaft, 22 ... Rolling bearing, 23 ... Idler pulley , 24 ... Inner ring, 27, 42 ... Alignment adjustment mechanism, 28, 29, 43, 44 ... Washer, 33, 47 ... Recess, 34, 35, 48, 49 ... Auxiliary washer, 37, 52 ... Projection, 39, 54 DESCRIPTION OF SYMBOLS ... Bolt (fastening means), 61 ... Alignment adjustment auxiliary tool, 62, 63 ... Shaft part, 62A, 63A ... End face, 66 ... Reference plane, 67-69 ... Adjustment auxiliary member, 71 ... Adjustment surface, P1 ... Plane.

Claims (10)

A mechanism for adjusting the alignment of a pulley supported by a bearing on a support shaft provided in a non-rotatable manner on a fixed member and on which a transmission belt is wound;
A pair of washers disposed on both sides of the pulley on the spindle;
A fastening means for fastening the inner ring of the bearing and the washers to the fixing member;
One of each of the washers and the inner ring of the bearing is provided with a recess having a rotational paraboloid, and the other is provided with a protrusion having a rotational paraboloid and engaging with the recess. A featured pulley alignment adjustment mechanism. A mechanism for adjusting the alignment of a pulley supported by a bearing on a support shaft provided in a non-rotatable manner on a fixed member and on which a transmission belt is wound;
A pair of washers disposed on both sides of the pulley on the spindle;
A pair of auxiliary washers respectively disposed between the pulleys on the spindle and the washers;
A fastening means for fastening the inner ring of the bearing, the both washers and the auxiliary washers to the fixing member;
One of each of the washers and each of the auxiliary washers is provided with a recess having a rotation paraboloid, and the other is provided with a protrusion having a rotation paraboloid and engaging with the recess. A featured pulley alignment adjustment mechanism. 3. The pulley alignment adjusting mechanism according to claim 1, wherein the fastening means functions as the support shaft and is configured by a bolt screwed into the fixing member. 4. A mechanism for adjusting the alignment of a pulley supported on a support shaft provided so as to be integrally rotatable with a rotation shaft and on which a transmission belt is wound;
A pair of washers disposed on both sides of the pulley on the spindle;
Fastening means for fastening the pulley and both washers to the rotary shaft;
One of each of the washers and the pulley is provided with a recess having a rotation paraboloid, and the other is provided with a protrusion having a rotation paraboloid and engaging with the recess. Pulley alignment adjustment mechanism. A mechanism for adjusting the alignment of a pulley supported on a support shaft provided so as to be integrally rotatable with a rotation shaft and on which a transmission belt is wound;
A pair of washers disposed on both sides of the pulley on the spindle;
A pair of auxiliary washers respectively disposed between the pulleys on the spindle and the washers;
Fastening means for fastening the pulley, the both washers and the auxiliary washer to the rotating shaft,
One of each of the washers and each of the auxiliary washers is provided with a recess having a rotation paraboloid, and the other is provided with a protrusion having a rotation paraboloid and engaging with the recess. A featured pulley alignment adjustment mechanism. 6. The pulley alignment adjusting mechanism according to claim 4, wherein the fastening means functions as the support shaft and is configured by a bolt screwed into the rotating shaft. A method of adjusting the alignment of the pulley using the pulley alignment adjusting mechanism according to any one of claims 1 to 6,
Prior to fastening by the fastening means, an alignment adjustment assisting tool having a planar adjustment surface is arranged so that the adjustment surface is orthogonal to the support shaft, and the side surface of the pulley is in surface contact with the adjustment surface. A pulley alignment adjustment method comprising adjusting the alignment of the pulley and performing fastening by the fastening means in this state. An alignment adjustment aid used in the pulley alignment adjustment method according to claim 7,
A shaft portion arranged in parallel to the support shaft by being brought into contact with a predetermined reference surface at one end surface;
A pulley alignment adjustment assisting device, comprising: an adjustment assisting member attached to the shaft portion and having an adjustment surface orthogonal to the coaxial portion. The pulley alignment adjustment assisting tool according to claim 8, wherein the adjustment assisting member is rotatably attached to the shaft portion. The pulley according to claim 8 or 9, wherein a plurality of the adjustment auxiliary members are provided on the shaft portion, and the adjustment surface of each adjustment auxiliary member is formed on a common plane orthogonal to the shaft portion. Alignment adjustment aids.

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