JP6950571B2 - Mounting jig and mounting method - Google Patents

Description

The present invention relates to a mounting jig for holding two members coaxially with a gap, and a mounting method using the mounting jig.

In the one-way clutch, when the inner ring member rotates in one direction with respect to the outer ring member, an engaging element such as a sprag bites into the outer ring member and the inner ring member, and the outer ring member and the inner ring member rotate integrally. This state is the "locked state". On the other hand, when the inner ring member rotates in the other direction with respect to the outer ring member, the biting is released and the inner ring member idles with respect to the outer ring member. This state is the "free state". In order for the one-way clutch to function in this way, the outer ring member and the inner ring member must be arranged coaxially. For this purpose, a configuration in which a rolling bearing is interposed between the outer ring member and the inner ring member is adopted (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2006-322597

Depending on the device in which the one-way clutch is used, as shown in FIG. 10, the outer ring member 91 and the inner ring member 92 are coaxial with each other without directly interposing a rolling bearing between the outer ring member 91 and the inner ring member 92. It may be arranged in a shape. In the device shown in FIG. 10, the outer ring member 91 is supported from the inside in the radial direction via a rolling bearing 99 made of a cage and a roller on the shaft 90. On the other hand, the inner ring member 92 is fixed to the shaft 90 by a fixing means (for example, welding or the like) at a position P1 on one side in the axial direction by providing a gap e between the inner ring member 92 and the shaft 90. This configuration is because, for example, different types of inner ring members 92 are attached to the common shaft 90.

The cylindrical inner ring member 92 is fixed to the shaft 90 at a position P1 on one side in the axial direction. At this time, the inner ring member 92 and the shaft 90 are held coaxially with a gap e, for example, by welding. It is necessary to fix it by means of.

Therefore, a method using the jig 95 shown in FIG. 11 can be considered. This jig 95 is a cylindrical member provided on the outer peripheral side of the shaft 90, and has a smaller inner peripheral surface 96 having an inner diameter slightly larger than the outer peripheral surface 93 of the shaft 90 and an outer peripheral surface 94 of the inner ring member 92. It has a large-diameter inner peripheral surface 97 having a slightly larger inner diameter. The small-diameter inner peripheral surface 96 and the large-diameter inner peripheral surface 97 are manufactured coaxially with high accuracy. By locating the shaft 90 and the inner ring member 92 on the inner peripheral side of the jig 95, the shaft 90 and the inner ring member 92 can be held coaxially with a gap e. In this held state, the shaft 90 and the inner ring member 92 are fixed by welding, for example. That is, the held state is maintained until the welding is completed.

However, the gap f1 between the small-diameter inner peripheral surface 96 of the jig 95 and the outer peripheral surface 93 of the shaft 90 is small, and the gap f2 between the large-diameter inner peripheral surface 97 of the jig 95 and the outer peripheral surface 94 of the inner ring member 92. If is small, it is difficult to fit the jig 95 on the shaft 90, and it is difficult to insert the inner ring member 92 between the jig 95 and the shaft 90. Further, even if the jig 95 is attached to the outer peripheral side of the shaft 90, the jig 95 is tilted with respect to the shaft 90 due to the gap f1. If the jig 95 is tilted even a little in this way, the work of inserting the inner ring member 92 between the jig 95 and the shaft 90 becomes even more difficult. In order to make these operations possible (easy), the gaps f1 and f2 may be increased, but in this case, the coaxiality between the shaft 90 and the inner ring member 92 is lowered.

As in the relationship between the shaft 90 and the inner ring member 92 as described above, the configuration in which the two members are arranged concentrically with a gap e is a rotation having a one-way clutch shown in FIG. It exists not only in equipment but also in other equipment.

Therefore, the present invention provides a mounting jig provided with a new technical means used for holding two members coaxially with a gap, and a mounting method using the jig. With the goal.

The present invention is a mounting jig for holding a cylindrical member coaxially with a gap on the outer peripheral side of an inner member having a circular cross section, and is a roller or a plurality of rollers that roll into contact with the outer peripheral surface of the inner member. A support unit having a plurality of rolling elements composed of rows of balls and an annular cage for holding the plurality of rolling elements, and an inner peripheral surface that fits on the outside of the plurality of rolling elements and brings the rolling elements into rolling contact. A guide cylinder body for guiding and inserting at least a part of the cylindrical member is provided on the inner peripheral side.

According to this mounting jig, the support unit is fitted on the outer peripheral side of the inner member, the guide cylinder is fitted on the outside of the rolling element of the support unit, and the support cylinder is formed between the guide cylinder and the inner member. When at least a part of the cylindrical member is guided and inserted into the annular space, the cylindrical member is held coaxially with a gap on the outer peripheral side of the inner member.

The support unit is easily attached to the inner member by fitting the support unit to the outer peripheral side of the inner member while the rolling element of the support unit rolls and contacts the inner member. Further, when the guide cylinder is fitted to the outside of the support unit, the rolling body rolls into contact with the inner peripheral surface of the guide cylinder, so that the guide cylinder can be easily attached to the support unit. Since the rolling element is composed of rollers or double-row balls, the inclination of the guide cylinder with respect to the inner member is suppressed, so that the inner member and the guide cylinder are coaxial with each other with high accuracy. Therefore, the work of inserting the cylindrical member into the annular space formed between the inner member and the guide cylinder becomes easier than before.

Further, the rolling element preferably has a diameter substantially equal to the difference between the radius of the outer peripheral surface of the cylindrical member and the radius of the outer peripheral surface of the inner member. In this case, the degree of concentricity between the inner member and the cylindrical member can be further increased.

Further, it is preferable that the rolling element is interposed between the guide cylinder and the inner member with a negative gap or a zero gap. In this case, the rigidity of the support unit is ensured. Therefore, the function of suppressing the inclination of the guide cylinder with respect to the inner member is enhanced.

Further, the rolling elements are provided evenly arranged at at least three places along the circumferential direction, and the cage includes a holding portion that holds the rolling elements and the rolling elements along the circumferential direction. It has a non-holding portion that does not exist, and the total circumferential length of the holding portion is preferably shorter than the total circumferential length of the non-holding portion. In this case, the portion of the guide cylinder located outside the non-holding portion in the radial direction is likely to be elastically deformed in the radial direction. Therefore, when the guide cylinder is attached to the outside of the support unit, or when at least a part of the cylindrical member is guided and inserted into the inner peripheral side of the guide cylinder, the work may be further facilitated. ..

Further, the mounting method of the present invention is a method for mounting the cylindrical member on the outer peripheral side of the inner member having a circular cross section with a gap and in a coaxial shape by using the mounting jig. The support unit is fitted on the outer peripheral side of the inner member while the inner member and the support unit are relatively rotated, and the guide cylinder is placed on the outside of the rolling element of the support unit, and the support unit and the guide cylinder are provided. Is fitted while rotating relative to each other, and at least a part of the cylindrical member is guided and inserted into the annular space formed between the guide cylinder and the inner member. According to this mounting method, the cylindrical member is held coaxially with a gap on the outer peripheral side of the inner member.

Further, the present invention is a mounting jig for holding a cylindrical member coaxially with a gap on the inner peripheral side of the outer member, and is around the time when it rolls into contact with the inner peripheral surface of the outer member or. A support unit having a plurality of rolling elements composed of a plurality of rows of balls and an annular cage for holding the plurality of the rolling elements, and an outer peripheral surface fitted inside the plurality of rolling elements to bring the rolling elements into rolling contact. Also provided on the outer peripheral side with a guide cylinder for guiding and fitting at least a part of the cylindrical member.

According to this mounting jig, the support unit is fitted on the inner peripheral side of the outer member, the guide cylinder is fitted inside the rolling element of the support unit, and the guide cylinder is formed between the guide cylinder and the outer member. When at least a part of the cylindrical member is guided and inserted into the annular space to be formed, the cylindrical member is held coaxially with a gap on the inner peripheral side of the outer member.

The support unit is easily attached to the outer member by fitting the support unit to the inner peripheral side of the outer member while the rolling element of the support unit rolls and contacts the outer member. Further, when the guide cylinder is fitted inside the support unit, the rolling element rolls into contact with the outer peripheral surface of the guide cylinder, so that the guide cylinder can be easily attached to the support unit. Since the rolling element is composed of rollers or double-row balls, the inclination of the guide cylinder with respect to the outer member is suppressed, so that the outer member and the guide cylinder are coaxial with each other with high accuracy. Therefore, the work of inserting the cylindrical member into the annular space formed between the outer member and the guide cylinder becomes easier than before.

Further, the mounting method of the present invention is a method for mounting the cylindrical member on the inner peripheral side of the outer member with a gap and in a coaxial shape by using the mounting jig. The support unit is fitted on the inner peripheral side of the support unit while the outer member and the support unit are relatively rotated, and the guide cylinder is placed inside the rolling element of the support unit. Is fitted while rotating relative to each other, and at least a part of the cylindrical member is guided and inserted into the annular space formed between the guide cylinder and the outer member. According to this mounting method, the cylindrical member is held coaxially with a gap on the inner peripheral side of the outer member.

According to the present invention, it is possible to easily hold the cylindrical member on the outer peripheral side (inner peripheral side) of the inner member (outer member) in a coaxial manner with a gap.

FIG. 5 is a cross-sectional view of a rotating device including a one-way clutch assembled using the mounting jig of the present invention. It is sectional drawing explaining the mounting jig. It is sectional drawing of the support unit. It is sectional drawing which shows the modification of the support unit. It is sectional drawing explaining the modification of the mounting jig. It is explanatory drawing of the mounting method using a mounting jig. It is explanatory drawing of the mounting method using a mounting jig. It is sectional drawing explaining the modification of the attachment jig of FIG. It is sectional drawing explaining the attachment jig of another form. It is sectional drawing of the rotating equipment including a one-way clutch. It is sectional drawing explaining the conventional jig.

[About rotating equipment]
FIG. 1 is a cross-sectional view of a rotating device including a one-way clutch 10 assembled using the mounting jig of the present invention. This rotating device includes a shaft 7, a rolling bearing 8, and a one-way clutch 10. The shaft 7 rotates around the central axis C. The one-way clutch 10 includes a sprag 11, a cage 12, a spring 13, an outer ring member 14, and an inner ring member 15. The cage 12 is an annular member and holds a plurality of sprags 11. The spring 13 urges each sprag 11 to maintain a predetermined posture.

The inner ring member 15 is a cylindrical member, and the sprag 11 comes into contact with the outer peripheral surface 27 thereof. The inner ring member 15 is fixed to a part 17 of the shaft 7 at the fixing portion 16 on one side in the axial direction. A gap e is formed along the circumferential direction between the inner peripheral surface 28 of the inner ring member 15 and the outer peripheral surface 29 of the shaft 7. The gap e is constant along the circumferential direction. That is, the shaft 7 and the inner ring member 15 are coaxially connected with a gap e. From the above, the inner ring member 15 is provided around the central axis C of the shaft 7. The fixing portion 16 of the inner ring member 15 and a part 17 of the shaft 7 are fixed by, for example, welding, and these fixing parts 16 and a part 17 are integrated. The fixing portion 16 and the part 17 may be fixed by other means. For example, instead of welding, bolting or bonding may be used.

The outer ring member 14 has an outer cylindrical portion 18, an annular portion 19, and an inner cylindrical portion 20. The outer cylindrical portion 18 has a cylindrical shape. The sprag 11 comes into contact with the inner peripheral surface of the outer cylindrical portion 18. The annulus portion 19 has an annulus shape. The annulus portion 19 is provided so as to extend radially inward from the axial end portion of the outer cylindrical portion 18. The inner cylindrical portion 20 has a cylindrical shape. The inner cylindrical portion 20 is provided so as to extend in the axial direction from the radially inner end portion of the annular portion 19.

A rolling bearing 8 is provided between the shaft 7 and the inner cylindrical portion 20. The rolling bearing 8 is composed of a cage and a roller. That is, the rolling bearing 8 is composed of a plurality of rollers (rollers, needle rollers in the example) 21 and an annular cage 22 that holds these rollers 21 at intervals in the circumferential direction. From the above, the outer ring member 14 is provided around the central axis C.

In the one-way clutch 10 having the above configuration, when the inner ring member 15 rotates in one direction together with the shaft 7 with respect to the outer ring member 14, the sprag 11 engages with the outer ring member 14 and the inner ring member 15, and the outer ring member 14 and the outer ring member 14 It rotates integrally with the inner ring member 15 (relative rotation becomes impossible). This state is the "locked state". On the other hand, when the inner ring member 15 rotates in the other direction with respect to the outer ring member 14, the biting is released, and the inner ring member 15 idles with respect to the outer ring member 14 (relative rotation becomes possible). This state is the "free state". In the one-way clutch 10, the member (engager) that engages with the outer ring member 14 and the inner ring member 15 may be other than the sprag 11.

In the rotating device shown in FIG. 1, the outer ring member 14 is supported by the shaft 7 from the inside in the radial direction via a rolling bearing 8. On the other hand, the inner ring member 15 is not directly supported by the shaft 7 by a bearing or the like. That is, the inner ring member 15 is fixed to the shaft 7 by welding or the like (fixing means) at a position P1 on one side in the axial direction by providing a gap e between the inner ring member 15 and the shaft 7. This configuration is because different types of inner ring members 15 are attached to the common shaft 7.

The cylindrical inner ring member 15 is fixed to the shaft 7 at a position P1 on one side in the axial direction. At this time, welding is performed with the inner ring member 15 and the shaft 7 held coaxially with a gap e. Need to do. That is, the held state is maintained until the welding is completed. Therefore, the mounting jig 30 shown in FIG. 2 is used.

[About mounting jig 30]
FIG. 2 is a cross-sectional view illustrating the mounting jig 30. The mounting jig 30 is a jig for holding the inner ring member (cylindrical member) 15 coaxially with a gap e on the outer peripheral side of the shaft (inner member) 7 having a circular cross section. The shaft 7 may be solid or hollow. The mounting jig 30 includes a support unit 31 and a guide cylinder 32. The support unit 31 has a plurality of rolling elements 33 and an annular cage 34 for holding the rolling elements 33. The rolling element 33 of the present embodiment is a cylindrical roller (needle roller). The support unit 31 consists of a cage and roller (adopted as a rolling bearing). Each rolling element 33 held by the cage 34 rolls into contact with the outer peripheral surface 29 of the shaft 7.

In the rolling element 33 and the cage 34 of the present embodiment, the components used as rolling bearings are diverted for jigs. The cage 34 includes a first annulus portion 35 provided on one side in the axial direction of the rolling element 33, a second annulus portion 36 provided on the other side in the axial direction of the rolling element 33, and a first annulus portion 35. It has a plurality of pillar portions 37 connecting the second ring portion 36. FIG. 3 is a cross-sectional view of the support unit 31. In FIGS. 2 and 3, the space between the first ring portion 35 and the second ring portion 36 and the pillar portions 37 and 37 adjacent to each other in the circumferential direction is the pocket 38 for accommodating the rolling element 33. Become. A minute gap is provided between the pocket 38 and the rolling element 33, and the rolling element 33 can slightly change its posture within the range of the pocket 38.

The rolling elements 33 are provided at a plurality of locations along the circumferential direction. In the form of FIG. 3, the rolling elements 33 are not held in all the pockets 38, and the rolling elements 33 are held in a part of all the pockets 38 (three pockets 38 in the illustrated example). The number of rolling elements 33 must be three or more, and as shown in FIG. 3, these rolling elements 33 are evenly arranged along the circumferential direction. In this way, the rolling elements 33 are equally arranged at at least three locations along the circumferential direction. As shown in FIG. 4, the rolling elements 33 may be housed in all the pockets 38.

In FIG. 3, in the annular cage 12, the portion (pocket 38) holding the rolling element 33 is called the “holding portion 24”, and the portion (pocket 38) in which the rolling element 33 does not exist is “non-pocket 38”. It is called "holding unit 23". The cage 12 of FIG. 3 has a holding portion 24 and a non-holding portion 23 along the circumferential direction. The holding portion 24 is a range constituting the pocket 38 holding the rolling element 33. The circumferential length of one holding portion 24 is defined as the circumferential length of the pocket 38 holding the rolling element 33. In the form of FIG. 3, the three holding portions 24 are evenly arranged along the circumferential direction. The non-holding portion 23 is a range constituting the pocket 38 that does not hold the rolling element 33. The circumferential length of one non-holding portion 23 is defined as the circumferential length of the pocket 38 that does not hold the rolling element 33. In the cage 12 of the present embodiment, a plurality of pockets 38 are provided along the circumferential direction, and the shape of each pocket 38 is the same. In the example of FIG. 3, since the number of the holding portions 24 is "3" and the number of the non-holding portions 23 is "9", the total length of the holding portions 24 in the circumferential direction is not. It is shorter than the total length of the holding portions 23 in the circumferential direction.

The rolling element 33 may be a double-row ball as shown in FIG. 5, other than the rollers (needle rollers) having a cylindrical shape. That is, two sets of a plurality of balls 33 provided along the circumferential direction are arranged side by side in the axial direction. A plurality of balls 33 included in each row (each set) are held by the cage 34 at intervals in the circumferential direction for each row.

The guide cylinder 32 is a cylindrical member. The guide cylinder 32 is sufficiently longer in the axial direction than the support unit 31. The plate thickness of the guide cylinder 32 is smaller (thinner) than its axial length, for example, several millimeters. The guide cylinder 32 has an inner peripheral surface 40 for guidance on one side in the axial direction (left side in FIG. 2) and an inner peripheral surface 39 for the rolling element 33 on the other side in the axial direction (right side in FIG. 2). .. The inner peripheral surface 39 for the rolling elements 33 is a cylindrical surface that fits on the outer side (diameter outer side) of the plurality of rolling elements 33 and brings the rolling elements 33 into rolling contact. The guiding inner peripheral surface 40 is a cylindrical surface for guiding and inserting a part 15a of the inner ring member 15. The inner peripheral surface 40 for guidance may have a diameter slightly larger than the outer peripheral surface 27 of the inner ring member 15, and may have the same diameter as the outer peripheral surface 27 of the inner ring member 15. In the present embodiment, the inner peripheral surface 39 for the rolling element 33 and the inner peripheral surface 40 for guidance have the same inner diameter, and their roundness is considered to be highly accurate. The inner diameter of the inner peripheral surface 39 (40) is the same as the diameter of the circumscribed circles of the plurality of rolling elements 33. The guide cylinder 32 has inner peripheral surfaces 39 and 40 with high dimensional accuracy, and is used repeatedly. Therefore, it is manufactured from a hard material (steel material) that is less likely to be scratched or worn. Specifically, the guide cylinder 32 is made of bearing steel.

The diameter D1 of the rolling element 33 may be slightly larger than the difference (R1-R2) between the radius R1 of the outer peripheral surface 27 of the inner ring member 15 and the radius R2 of the outer peripheral surface 29 of the shaft 7. When the diameter D1 is slightly larger than the difference (R1-R2), the maximum difference between the diameter D1 and the difference (R1-R2) is 0.01 millimeters. The diameter D1 may be the same as the difference (R1-R2). As described above, the diameter D1 of the rolling element 33 is substantially equal to the difference between the radius R1 of the outer peripheral surface 27 of the inner ring member 15 and the radius R2 of the outer peripheral surface 29 of the shaft 7 (D1≈R1-R2). With this configuration, the inner peripheral surface 40 (39) of the guide cylinders 32 fitted to the outside of the plurality of rolling elements 33 is not smaller in the radial direction than the outer peripheral surface 27 of the inner ring member 15, and the inner ring member 15 is formed. An inner peripheral surface 40 for guidance is obtained for guiding (guided) a part of 15a.

In the present embodiment, the diameter D1 of the rolling element 33 is the same as the difference (R3-R2) between the radius R3 of the inner peripheral surface 39 of the guide cylinder 32 and the radius R2 of the outer peripheral surface 29 of the shaft 7. That is, the rolling element 33 is interposed between the guide cylinder 32 and the shaft 7 with a zero gap in the radial direction. Alternatively, the diameter D1 of the rolling element 33 may be slightly larger than the difference (R3-R2). That is, the rolling element 33 may be interposed between the guide cylinder 32 and the shaft 7 as a negative gap in the radial direction. When the diameter D1 is slightly larger than the difference (R3-R2), the maximum difference between the diameter D1 and the difference (R3-R2) is 0.01 mm. The rigidity of the support unit 31 composed of the cage and roller is relatively low, but the rigidity of the support unit 31 is ensured by setting the negative gap or the zero gap as described above.

[Mounting method using mounting jig 30]
A method for mounting the inner ring member 15 (cylindrical member) on the outer peripheral side of the shaft (inner member) 7 having a circular cross section with a gap e and coaxially using the mounting jig 30 having the above configuration will be described. do. Here, the case where the mounting jig 30 of the form shown in FIG. 2 is used will be described, but the same method is used when the mounting jig 30 of the form shown in FIG. 5 is used.

As shown in FIG. 6, the shaft 7 and the support unit 31 are brought close to each other along the axial direction, and the support unit 31 is fitted on the outer peripheral side of the shaft 7. This fitting operation is performed while the shaft 7 and the support unit 31 are relatively rotated. By rotating relative to each other in this way, the support unit 31 is fitted to the outer peripheral side of the shaft 7 while the rolling element 33 of the support unit 31 rolls and contacts the outer peripheral surface 29 of the shaft 7. Since the friction caused by the contact between the support unit 31 and the shaft 7 becomes rolling friction, the resistance is reduced and the support unit 31 can be easily attached to the shaft 7. Further, since the resistance between the support unit 31 and the shaft 7 becomes small, disassembly after the work is completed becomes easy.

When the support unit 31 is attached to the shaft 7, a part 15a of the inner ring member 15 may be fitted to the shaft 7 on the opposite side (right side in FIG. 6) of the shaft 7. However, in this state, the shaft 7 and the inner ring member 15 are misaligned (not coaxial).

As shown in FIG. 7, the guide cylinder 32 is fitted to the outside of the plurality of rolling elements 33 included in the support unit 31. This fitting operation is performed while the support unit 31 and the guide cylinder 32 are relatively rotated. By rotating relative to each other in this way, the rolling element 33 rolls into contact with the inner peripheral surface 39 of the guide cylinder 32, so that the guide cylinder 32 can be easily attached to the support unit 31. That is, since the friction caused by the contact between the support unit 31 and the guide cylinder 32 becomes rolling friction, the resistance becomes small and the work becomes easy. Moreover, since the resistance is small, it is easy to disassemble after the work is completed. Further, at the same time that the guide cylinder 32 is fitted to the outside of the support unit 31, or after the guide cylinder 32 is fitted to the outside of the support unit 31, an annular shape is formed between the guide cylinder 32 and the shaft 7. A part 15a of the inner ring member 15 is guided (guided) into the space K by the inner peripheral surface 40 of the guide cylinder 32 and inserted.

As a result, as shown in FIG. 2, the inner ring member 15 is held coaxially with a gap e (the gap e is constant along the circumferential direction) on the outer peripheral side of the shaft 7. The guide cylinder 32 can rotate around the central axis C by rolling contact of the rolling body 33 of the support unit 31 with the inner peripheral surface 39 thereof. Therefore, when inserting a part 15a of the inner ring member 15 into the annular space K, it is preferable to rotate the guide cylinder 32 with respect to the inner ring member 15. This facilitates the work of insertion.

The rolling element 33 included in the support unit 31 is composed of rollers (or, as shown in FIG. 5, double-row balls). Therefore, in a state where the support unit 31 is externally fitted to the shaft 7, the inclination of the guide cylinder 32 with respect to the shaft 7 is suppressed, so that the shaft 7 and the guide cylinder 32 are coaxial with each other with high accuracy. Therefore, the work of inserting the inner ring member 15 into the annular space K (see FIG. 7) between the shaft 7 and the guide cylinder 32 becomes easier than before.

A minute gap is provided between the pocket 38 of the cage 34 (see FIGS. 3 and 4) of the support unit 31 and each rolling element 33, and the rolling element 33 takes a posture within the range of the pocket 38. It can be changed slightly. Therefore, in each of the above operations (FIGS. 6 and 7) using the support unit 31, each rolling element 33 can rotate (revolve while rotating) in the pocket 38 with a slight change in posture. Therefore, each of the above operations is easy (the resistance is small and smooth).

Further, the rolling element 33 is formed of a cylindrical roller (needle roller) and has a crowning shape on its outer peripheral surface. Therefore, for example, when the support unit 31 (see FIG. 6) is fitted to the shaft 7 from the end of the shaft 7, mutual interference (catch) is suppressed and the work becomes easy.

[About the mounting jig 30 of the above embodiment]
As described above, the mounting jig 30 of the present embodiment includes the support unit 31 and the guide cylinder 32. The support unit 31 has a plurality of rolling elements 33 composed of rollers (or double-row balls) that roll into contact with the outer peripheral surface 29 of the shaft 7, and an annular cage 34 that holds the rolling elements 33. The guide cylinder 32 has an inner peripheral surface 39 that fits on the outer side of the plurality of rolling elements 33 and brings the rolling elements 33 into rolling contact, and at least a part 15a of the inner ring member 15 is guided and inserted into the inner peripheral side. It has an inner peripheral surface 40 for the purpose. According to the mounting jig 30, the support unit 31 is fitted on the outer peripheral side of the shaft 7 (see FIG. 6), and as shown in FIG. 7, a guide cylinder is provided on the outside of the rolling element 33 of the support unit 31. When the body 32 is fitted and at least a part 15a of the inner ring member 15 is guided and inserted into the annular space K formed between the guide cylinder 32 and the shaft 7, the inner ring member 15 is placed on the outer peripheral side of the shaft 7. Is held coaxially with a gap e (see FIGS. 2 and 5).

In the case of the present embodiment (see FIG. 2), each rolling element 33 has a difference (R1-R2) and (omitted) between the radius R1 of the outer peripheral surface 27 of the inner ring member 15 and the radius R2 of the outer peripheral surface 29 of the shaft 7. Have the same diameter D1. Therefore, when the inner ring member 15 is guided and inserted in the axial direction along the guiding inner peripheral surface 40 of the guide cylinder 32, the concentricity between the shaft 7 and the inner ring member 15 is further increased. Is possible.

In the support unit 31 of the present embodiment, each rolling element 33 is interposed between the guide cylinder 32 and the shaft 7 with a negative gap or a zero gap. The rigidity of the support unit 31 composed of the cage and roller is relatively low, but the rigidity of the support unit 31 is ensured by setting the negative gap or the zero gap as described above. Therefore, the function of suppressing the inclination of the guide cylinder 32 with respect to the shaft 7 is enhanced in a state where the guide cylinder 32 is fitted onto the shaft 7 with the support unit 31 sandwiched therein.

As shown in FIG. 3, in the support unit 31, the rolling elements 33 are provided evenly arranged at at least three locations along the circumferential direction. The cage 34 has a holding portion 24 that holds the rolling element 33 and a non-holding portion 23 in which the rolling element 33 does not exist, along the circumferential direction. The total circumferential length of the holding portion 24 is shorter than the total circumferential length of the non-holding portion 23. That is, the rolling elements 33 are not held in all the pockets 38 of the cage 34. For this reason, the portion of the guide cylinder 32 located on the outer side in the radial direction of the non-holding portion 23 is easily elastically deformed, albeit slightly in the radial direction (about several micrometers). Therefore, when the guide cylinder 32 is attached to the outside of the support unit 31, and when a part 15a of the inner ring member 15 is guided and inserted into the inner peripheral side of the guide cylinder 32, the work becomes easier. May become. Even if the guide cylinder 32 is elastically deformed by an external force, the guide cylinder 32 returns to a perfect circle due to the elastic restoration force if the external force is released.

From the above, according to the mounting jig 30, the inner ring member 15 can be held coaxially with a gap e on the outer peripheral side of the shaft 7 more easily than before. As described with reference to FIG. 1, the coaxial state may be maintained until welding is completed between the shaft 7 and the inner ring member 15.

[Modification example of mounting jig 30 in FIG. 2]
FIG. 8 is a cross-sectional view illustrating a modified example of the mounting jig 30 of FIG. This mounting jig 30 is different from the mounting jig 30 of FIG. 2 in that it includes two support units. That is, the mounting jig 30 of FIG. 8 includes a first support unit 31 and a guide cylinder 32, and further includes a second support unit 41. The configuration of the first support unit 31 and the guide cylinder 32 is the same as that of FIG. 2, and the description thereof will be omitted. However, the diameter D1 of the rolling element 33 of the first support unit 31 and the inner diameter of the guide cylinder 32 may differ from the form shown in FIG. The second support unit 41 has a plurality of rolling elements 43 and an annular cage 44 that holds the rolling elements 43. The rolling element 43 is a cylindrical roller (needle roller). Alternatively, it may be a double-row ball. The second support unit 41 also comprises a cage and roller (used as a rolling bearing). Each rolling element 43 held by the cage 44 rolls into contact with the outer peripheral surface 27 of the inner ring member 15 (part 15a) and the inner peripheral surface 40 for guiding the guide cylinder 32.

In the case of this mounting jig 30, the inner ring member 15 is guided and inserted into the annular space formed between the second support unit 41 provided in advance inside the guide cylinder 32 and the shaft 7. .. At this time, the inner ring member 15 and the second support unit 41 may be relatively rotated. As a result, in the work of guiding and inserting the inner ring member 15 into the annular space, the work is not a sliding contact but a rolling contact, so that this work becomes even easier.

[Other form of mounting jig 30]
FIG. 9 is a cross-sectional view illustrating another form of mounting jig. The mounting jig 60 is a jig for holding the outer ring member 58 made of a cylindrical member on the inner peripheral side of the housing (outer member) 56 with a gap e in a coaxial shape. The housing 56 has an inner peripheral surface 57 having a circular cross section centered on the central axis C. The mounting jig 60 provides a state in which the outer ring member 58 is coaxially held on the inner peripheral surface 57 with a gap e.

The mounting jig 60 includes a support unit 61 and a cylindrical guide cylinder 62. The support unit 61 has a plurality of rolling elements 63 that roll and contact the inner peripheral surface 57 of the housing 56, and an annular cage 64 that holds the plurality of rolling elements 63. Similar to the above-described form, the rolling element 63 is formed of a cylindrical roller, but may be a double-row ball (see FIG. 5). The support unit 61 may have a different diameter than the support unit 31 of FIG. 2, but has the same configuration. The guide cylinder 62 has an outer peripheral surface 69 for the rolling element 63 and an outer peripheral surface 70 for guiding. The outer peripheral surface 69 for the rolling elements 63 fits inside the plurality of rolling elements 63 (inside in the radial direction) and brings the rolling elements 63 into rolling contact. The outer peripheral surface 70 for guidance guides the outer ring member 58 to the outer peripheral side of the guide cylinder 62 and fits it outerly.

The method for mounting the outer ring member 58 on the inner peripheral side of the housing 56 with a gap e and in a coaxial shape by using the mounting jig 60 is as follows.
First, the support unit 61 is fitted to the inner peripheral side of the housing 56 while the housing 56 and the support unit 61 are relatively rotated.
Next, the guide cylinder 62 is fitted inside the rolling element 63 of the support unit 61 while the support unit 61 and the guide cylinder 62 are relatively rotated. At the same time as or after this work, the outer ring member 58 is guided and inserted into the annular space formed between the guide cylinder 62 and the housing 56. When guiding and inserting the outer ring member 58, it is preferable to rotate the outer ring member 58 and the guide cylinder 62 relative to each other.

According to this method, the outer ring member 58 is held coaxially on the inner peripheral side of the housing 56 with a gap e (the gap e is constant along the circumferential direction). Since the support unit 61 is fitted to the inner peripheral side of the housing 56 while the rolling element 63 of the support unit 61 rolls into contact with the housing 56, the support unit 61 can be easily attached to the housing 56. Further, when the guide cylinder 62 is fitted inside the support unit 61, the rolling body 63 rolls into contact with the outer peripheral surface 69 of the guide cylinder 62, so that the guide cylinder 62 can be easily attached to the support unit 61. Since the rolling element 63 is composed of rollers (or balls in a double row), the inclination of the guide cylinder 62 with respect to the housing 56 is suppressed. Therefore, the housing 56 and the guide cylinder 62 are coaxial with each other with high accuracy. Therefore, the work of inserting the outer ring member 58 into the annular space formed between the housing 56 and the guide cylinder 62 becomes easier than before.

The mounting jig 60 of FIG. 9 further has the following configurations.
The rolling element 63 is substantially equal to (R5-R4) the difference (R5-R4) between the radius R5 of the inner peripheral surface 57 of the housing 56 and the radius R4 of the inner peripheral surface 59 of the outer ring member 58 (slightly larger or equal to the difference). It has a diameter of D2.
Further, the rolling element 63 is interposed between the guide cylinder body 62 and the housing 56 with a negative gap or a zero gap in the radial direction. Therefore, the rigidity of the support unit 61 composed of the cage and roller is relatively low, but the rigidity of the support unit 61 is ensured by setting the negative gap or the zero gap as described above.

Further, the mounting jig 60 may have the configuration described with reference to FIG. That is, the rolling elements 63 are equally arranged at at least three locations along the circumferential direction. The cage 64 has a holding portion 24 that holds the rolling element 63 and a non-holding portion 23 in which the rolling element 63 does not exist, along the circumferential direction. The total circumferential length of the holding portion 24 is shorter than the total circumferential length of the non-holding portion 23.

From the above, according to the mounting jig 60, the outer ring member 58 can be held coaxially with a gap e on the inner peripheral side of the housing 56 more easily than before. For example, when the housing 56 and the outer ring member 58 are fixed while maintaining the above state, the work for fixing the housing 56 and the outer ring member 58 may be performed while maintaining the coaxial shape by using the attachment jig 60.

Further, similarly to the mounting jig 30 of FIG. 8, as a modification of the mounting jig 60 of FIG. 9, a second support unit may be interposed between the guide cylinder 62 and the outer ring member 58.

[About others]
The embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of rights of the present invention is not limited to the above-described embodiment, and includes all modifications within the scope equivalent to the configuration described in the scope of claims.
In FIG. 3, the number of rolling elements 33 (63) is set to 3, but it may be 5 or the like, and the number can be changed.
The equipment assembled by using the mounting jigs of the respective forms may be other than the rotating equipment having the one-way clutch as shown in FIG.

7: Shaft (inner member) 15: Inner ring member (cylindrical member) 15a: Part 23: Non-holding part 24: Holding part 27: Outer peripheral surface 29: Outer peripheral surface 30: Mounting jig 31: Support unit 32: Guide cylinder 33: Rolling element 34: Cage 39: Inner peripheral surface 56: Housing (outer member) 57: Inner peripheral surface 58: Outer ring member (cylindrical member) 59: Inner peripheral surface 60: Mounting jig 61: Support unit 62: Guide Cylinder 63: Rolling body 64: Cage 69: Outer peripheral surface e: Gap

Claims (7)

A mounting jig for holding a cylindrical member coaxially with a gap on the outer peripheral side of the inner member having a circular cross section.
A support unit having a plurality of rolling elements made of rollers or multiple rows of balls that roll into contact with the outer peripheral surface of the inner member, and an annular cage that holds the plurality of the rolling elements.
A guide cylinder that fits on the outside of the plurality of rolling elements and has an inner peripheral surface that rolls and contacts the rolling elements, and guides and inserts at least a part of the cylindrical member on the inner peripheral side.
A mounting jig. The mounting jig according to claim 1, wherein the rolling element has a diameter substantially equal to the difference between the radius of the outer peripheral surface of the cylindrical member and the radius of the outer peripheral surface of the inner member. The mounting jig according to claim 1 or 2, wherein the rolling element is interposed between the guide cylinder and the inner member with a negative gap or a zero gap. The rolling elements are provided evenly arranged at at least three locations along the circumferential direction.
The cage has a holding portion that holds the rolling element and a non-holding portion in which the rolling element does not exist along the circumferential direction.
The mounting jig according to any one of claims 1 to 3, wherein the total circumferential length of the holding portion is shorter than the total circumferential length of the non-holding portion. A method for mounting the cylindrical member on the outer peripheral side of the inner member having a circular cross section with a gap and in a coaxial shape by using the mounting jig according to any one of claims 1 to 4. There,
The support unit is fitted on the outer peripheral side of the inner member while the inner member and the support unit are relatively rotated.
The guide cylinder is fitted to the outside of the rolling element of the support unit while the support unit and the guide cylinder are rotated relative to each other, and an annular shape is formed between the guide cylinder and the inner member. A mounting method in which at least a part of the cylindrical member is guided and inserted into a space. A mounting jig for holding a cylindrical member coaxially with a gap on the inner peripheral side of the outer member.
A support unit having a plurality of rolling elements made of rollers or multiple rows of balls that roll into contact with the inner peripheral surface of the outer member, and an annular cage that holds the plurality of the rolling elements.
A guide cylinder that fits inside the plurality of rolling elements and has an outer peripheral surface that rolls and contacts the rolling elements, and guides and outerly fits at least a part of the cylindrical member on the outer peripheral side.
A mounting jig. A method for mounting the cylindrical member on the inner peripheral side of the outer member with a gap and in a coaxial shape by using the mounting jig according to claim 6.
The support unit is fitted to the inner peripheral side of the outer member while the outer member and the support unit are relatively rotated.
The guide cylinder is fitted inside the rolling body of the support unit while the support unit and the guide cylinder are relatively rotated, and an annular shape is formed between the guide cylinder and the outer member. A mounting method in which at least a part of the cylindrical member is guided and inserted into a space.

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