JP2016044705A - Chain-type cage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chain-type cage capable of reducing assembly work man-hours to solve problems in the chain-type cage in which pins penetrating through rolling elements are connected by a plate, tips of the pins are threaded to be fixed by nuts so that the plate does not fall, and further in a large-scaled rolling bearing, the number of rolling elements is large, so that the number of times of screwing work is increased, and the assembly is very troublesome.SOLUTION: In a chain-type cage 49, supporting members 40, 46 are penetrated through cylindrical rollers 4, and connecting members 42 have the flat shape and are provided with connection holes 44. Both shaft end portions of the supporting members 40 respectively have a cylindrical retaining portion 47 and a cylindrical locking portion 48. An outer diameter dimension of the retaining portion 47 is larger than an inner diameter dimension of the connection hole 44, a width in an axial direction of the locking portion 48 is larger than a thickness of the connecting member 42, and an outer diameter dimension of the locking portion 48 is smaller than the outer diameter dimension of the retaining portion 47. The connecting members 42 are fitted to the locking portions 48.SELECTED DRAWING: Figure 2

Description

  The present invention is a pin type cage that is preferably used for a large-sized rolling bearing that rotatably supports a main shaft of a wind turbine generator, and is a chain type in which pins penetrating rolling elements are connected in a chain shape by a link plate Related to cage.

Since the diameter of the rolling bearing that rotatably supports the main shaft of the wind turbine generator is large, the cage incorporated in the rolling bearing becomes large. Since a large cage is thinner than its diameter, it is easy to bend when it is manufactured as a single piece, making it difficult to incorporate it into a rolling bearing. Therefore, by providing pins that penetrate the rolling elements in the axial direction and sequentially connecting the pins adjacent in the circumferential direction in a chain with a plate, the type of holding that holds the rolling elements at a predetermined interval on the circumference A device (hereinafter referred to as “chain type cage”) has been devised (Patent Document 1).
In this chain type cage, after connecting pins adjacent in the circumferential direction with a plate, as a method to prevent the plate from coming off the pin and falling off, the tip of the pin is threaded to the tip of the pin. A method of attaching a nut is used.

JP2012-237431A

  In a large-sized rolling bearing, the number of rolling elements incorporated is large, and the number of pins constituting the chain type cage is increased. As described above, the assembly method in which the nut is fastened to the tip of the pin requires many fixing parts such as a nut. When tightening a nut, the process of attaching the nut to the screw at the tip of the pin one by one and tightening the nut with a predetermined torque must be repeated many times. For this reason, enormous man-hours were required to assemble the chain type cage.

  In view of these circumstances, an object of the present invention is to reduce the man-hour required for the assembly work of the chain type cage.

  The chain type retainer according to one aspect of the present invention has an axis, a support member that penetrates the rolling element and rotatably supports the rolling element around the axis, and the axial direction of the rolling element In both outer sides, the chain-type cage has a connecting member for connecting adjacent support members to each other, and the connecting member is arranged over the entire circumference in the circumferential direction. The supporting member has a retaining portion and a locking portion at both shaft end portions, respectively, and the retaining member has a circular connecting hole penetrating in the thickness direction. The portion has a cylindrical shape, and an outer diameter dimension thereof is larger than an inner diameter dimension of the connection hole, and the locking portion has a cylindrical shape, and has a width in the axial direction inwardly in the axial direction from the retaining portion. Is formed larger than the thickness of the connecting member, Outer diameter of Kigakaritome portion is smaller than the outer diameter of the retaining portion, the connecting member is fitted into the locking portion.

  The chain type cage of another embodiment of the present invention includes an axis, a support member that passes through the rolling element and rotatably supports the rolling element around the axis, and the axial direction of the rolling element In the chain type retainer having a connecting member for connecting the adjacent supporting members to each other on both outer sides, and the connecting member is arranged over the entire circumference in the circumferential direction, the supporting member is coaxial. And the connecting member has a flat plate shape and has a circular connecting hole penetrating in the thickness direction. The inner shaft has a retaining portion and a locking portion at both shaft end portions, respectively, and the retaining portion is cylindrical and has an outer diameter larger than an inner diameter of the connecting hole. The locking portion has a cylindrical shape, and is from the retaining portion. In the axial direction inward, the width in the axial direction is formed larger than the thickness of the connecting member, and the outer diameter of the locking portion is smaller than the outer diameter of the retaining portion, and the support member is Among a pair of the connecting members adjacent to each other in the circumferential direction, one connecting member is locked to the outer cylinder, and the other connecting member is more outward in the axial direction than the one connecting member. It is fitted to the locking part.

  The chain type retainer according to still another embodiment of the present invention includes an axis, a support member that passes through the rolling element and rotatably supports the rolling element around the axis, and the axis of the rolling element In a chain type cage in which the connecting members that connect adjacent support members to each other on both outer sides in the direction are arranged over the entire circumference in the circumferential direction, the connecting member is And a flat connecting hole having a circular connecting hole penetrating in the thickness direction, and the supporting member has a retaining part and a locking part at both shaft end parts, The retaining portion has a cylindrical shape, and an outer diameter dimension thereof is larger than an inner diameter dimension of the connection hole, and the locking portion has a cylindrical shape, and is axially inward of the retaining portion, and the axial direction. The width of the connecting member is larger than the thickness of the connecting member. And the outer diameter of the locking portion is smaller than the outer diameter of the retaining portion, and one of the pair of connecting members adjacent to each other in the circumferential direction with the support member interposed therebetween, The other connecting member is locked to the support member, and the other connecting member is fitted to the locking portion on the outer side in the axial direction than the one connecting member.

  By comprising as mentioned above, the man-hour required for the assembly operation | work of a chain type holder | retainer can be reduced.

It is a principal part enlarged view of the chain type holder | retainer of 1st Embodiment. It is the expanded view which looked at the chain type holder | retainer of 1st Embodiment from the circumferential direction outer side. It is a principal part enlarged view of the chain type holder | retainer of 2nd Embodiment. It is the expanded view which looked at the chain type holder | retainer of 2nd Embodiment from the circumferential direction outer side. It is an enlarged view of the pin shape of a 3rd embodiment. It is a figure explaining the fitting state of the outer side plate and pin in 3rd Embodiment. It is sectional drawing of the axial direction of the cylindrical roller bearing 1 which is 1st Embodiment of this invention.

(First embodiment)
A first embodiment of the invention will be described with reference to FIGS. 1, 2 and 7. FIG. FIG. 1 is an enlarged view of a main part of a chain type retainer 49 according to the first embodiment. FIG. 2 is a development view developed on a plane as viewed from the outside in the radial direction in order to explain the structure of the chain type retainer 49 of the first embodiment. In FIG. 2, the upper side from the cylindrical roller 4 is in a state before assembly, and the lower side is in a state after assembly. FIG. 7 is a sectional view in the axial direction of the cylindrical roller bearing 1 incorporating the chain type retainer 49 of the first embodiment.

The cylindrical roller bearing 1 of FIG. 7 is used for the purpose of rotating and supporting the main shaft of the wind power generator, and its diameter dimension is about 1 m.
The cylindrical roller bearing 1 includes an outer ring 2, an inner ring 3, a plurality of cylindrical rollers 4 that are rolling elements inserted between the outer ring 2 and the inner ring 3, and a chain type retainer 49. Has been.

The outer race 2 has an outer raceway surface 6 formed over the entire inner circumference.
The inner ring 3 is arranged coaxially with the outer ring 2, and an inner raceway surface 7 is formed over the entire outer circumference.
The cylindrical roller 4 has an outer peripheral surface 5 having a cylindrical shape, and end surfaces 8 are formed on both outer sides in the axial direction of the outer peripheral surface 5. Both end faces 8, 8 are planes orthogonal to the axis. The outer peripheral surface 5 and both end surfaces 8 and 8 are finished by grinding. The cylindrical roller 4 is in contact with the outer raceway surface 6 and the inner raceway surface 7, and the cylindrical roller 4 rolls on each raceway surface 6, 7 when the cylindrical roller bearing 1 rotates.
The cylindrical roller 4 is provided with a guide hole 9 coaxially with the axis of the cylindrical roller 4.

The chain type retainer 49 of the first embodiment will be described with reference to FIG.
The chain type retainer 49 is formed by alternately connecting a plurality of first subunits 45 and a plurality of second subunits 55 in the circumferential direction of the cylindrical roller bearing 1. The “support member” is formed by coaxially combining the roller support member 46 that is an “outer cylinder” and the pin 40 that is an “inner shaft”. This “support member” penetrates the cylindrical roller 4 and rotatably supports the cylindrical roller 4. Hereinafter, the “circumferential direction” refers to the circumferential direction of the cylindrical roller bearing 1.

The first subunit 45 will be described taking the first subunit incorporated at the positions (d) and (e) in FIG. 2 as an example.
The first subunit 45 includes two roller support members 46, 46 and a pair of inner plates 41, 41 that are connecting members that connect the shaft ends of the roller support members 46, 46.

The roller support member 46 is made of a carbon steel pipe and has a hollow cylindrical shape.
In the roller support member 46, the outer diameter dimension is slightly smaller than the inner diameter dimension of the guide hole 9 provided in the cylindrical roller 4, and the inner diameter dimension is slightly larger than the outer diameter dimension of the pin 40.
The roller support member 46 is inserted into the guide hole 9 of the cylindrical roller 4 so as to rotatably support the cylindrical roller 4 around the roller support member 46. While the cylindrical roller bearing 1 is rotating, the outer peripheral surface of the roller support member 46 is in sliding contact with the inner peripheral surface of the guide hole 9 of the cylindrical roller 4. In order to prevent wear of the roller support member 46, the entire surface of the roller support member 46 is hardened and hardened to a hardness of about 50 HRC.

  The inner plate 41 is manufactured by punching with a press using a carbon steel plate such as SPCC. The inner plate 41 has a substantially rectangular shape in front view, and two inner connecting holes 43 penetrating in the thickness direction are formed at positions separated from each other in the longitudinal direction. The dimension between the centers of the inner connecting holes 43 is larger than the diameter dimension of the cylindrical roller 4. The inner connecting hole 43 has a circular shape when viewed in the thickness direction of the inner plate 41 and is formed by stamping with a press. The inner diameter of the inner connecting hole 43 is slightly smaller than the outer diameter of the roller support member 46.

The first subunit 45 is assembled as follows.
First, roller support members 46 and 46 are inserted into the guide holes 9 and 9 of two adjacent cylindrical rollers 4 and 4 among the cylindrical rollers 4 incorporated between the inner ring 3 and the outer ring 2. Next, the inner connection holes 43 and 43 of the inner plates 41 and 41 are simultaneously press-fitted into the shaft ends of the roller support members 46 and 46 from both sides in the axial direction of the roller support members 46 and 46, so that the inner plates 41 and 41 are It is assembled.
Since the cylindrical rollers 4 are incorporated so as to have a slight gap between the end face 8 and the inner plate 41 on both sides in the axial direction, the cylindrical rollers 4 and 4 can freely move around the roller support portion 46. Can be rotated.

  After the first subunit 45 is assembled at the positions (d) and (e), the other two rollers adjacent to each other (for example, the rollers at the positions (b) and (c)) are similarly set to the first The subunit 45 is assembled. By sequentially performing this assembly operation, the plurality of first subunits 45 are assembled on the circumference of the cylindrical roller bearing 1.

The second subunit 55 will be described by taking the second subunit incorporated at positions (c) and (d) in FIG. 2 as an example.
The second subunit 55 includes two pins 40 and 40 and outer plates 42 and 42 that are connecting members that connect the shaft ends of the pins 40 and 40.

The pin 40 has a substantially cylindrical shape, and is manufactured by turning a carbon steel material, and then is hardened and hardened to a hardness of about 50 HRC.
As shown in FIG. 1, both axial ends of the pin 40 are axially inward from the axial end (the direction from the center of the pin 40 toward the axial end is called “axially outward”, and the opposite direction is A diameter stop portion 48 having a concave axial cross section is formed at a position close to “inward in the axial direction”. A portion sandwiched in the axial direction between the shaft end of the pin 40 and the diameter stop portion 48 is a retaining portion 47.
Since the shape of the shaft end portion of the pin 40 is the same on both sides in the axial direction, the shape of one shaft end portion will be described below.

  The locking portion 48 is formed of a bottom surface 48a, an outer surface 48b, and an inner surface 48c. The bottom surface 48 a is a cylindrical surface parallel to the axis of the pin 40. The outer side surface 48 b is formed radially outward from the axially outer end of the bottom surface 48 a at a right angle to the axis of the pin 40. The inner side surface 48 c is formed radially outward from the axially inner end of the bottom surface 48 a at a right angle to the axis of the pin 40. The axial length W1 of the locking portion 48 is larger than the thickness W0 of the outer plate 42.

The retaining portion 47 has a cylindrical shape formed coaxially with the axis of the pin, and is formed by an outer peripheral surface 47 a, a chamfered portion 56, and an end surface 52. The radially outer end of the outer side surface 48 b is connected to the outer peripheral surface 47 a of the retaining portion 47. The outer peripheral surface 47 a is a cylindrical surface that is coaxial with the axis of the pin 40. Thus, the outer diameter D0 of the outer peripheral surface 47a is larger than the outer diameter D2 of the bottom surface 48a of the locking portion 48.
The outer diameter D0 of the outer peripheral surface 47a is slightly larger than the inner diameter D1 on the small diameter side of the outer connecting hole 44. The size of the interference (D0-D1) is preferably about 1/1000 of the outer diameter D0 of the retaining portion 47 so that the outer connecting hole 44 can be easily press-fitted into the outer peripheral surface 47a of the pin 40. is there.

  The portion sandwiched in the axial direction by the diameter stop portions 48, 48 formed at both ends in the axial direction forms a column portion 51. The outer peripheral surface 51 a of the column part 51 has a cylindrical shape, and its outer diameter is slightly smaller than the inner diameter of the roller support member 46. As a result, the column portion 51 and the roller support member 46 are combined so as to be swingable with respect to each other. The axial length of the column portion 51 is equal to the axial length of the roller support member 46.

The outer plate 42 is manufactured by punching with a press using a carbon steel plate such as SPCC. The outer plate 42 has a substantially rectangular shape when viewed from the front, and two outer connecting holes 44 penetrating in the thickness direction are formed at positions separated from each other in the longitudinal direction. The outer connecting hole 44 has a circular shape when viewed in the thickness direction of the inner plate 41 and is formed by stamping with a press.
The inner periphery of the outer connecting hole 44 is punched with a press and then further pressed with a tapered die. Thereby, the inner peripheral surface of the outer connecting hole 44 has a tapered shape in which the inner diameter dimension gradually increases from one opening end toward the other opening end (see FIG. 1).

Next, the assembly procedure of the second subunit 55 will be described.
The assembly of the second subunit 55 is performed by first inserting the pins 40 and 40 into the inner diameter of the roller support members 46 and 46 of the first subunit 45. Next, the outer connecting holes 44, 44 of the outer plates 42, 42 are simultaneously press-fitted into the shaft ends of the pins 40, 40 from both axial sides of the pins 40, 40, whereby the outer plates 42, 42 are assembled. ing.

When the outer plate 42 is assembled to the shaft end of the pin 40, the large diameter opening side of the outer connecting hole 44 is disposed so as to face the retaining portion 47 of the pin 40. By doing so, since the outer connecting hole 44 is guided at the tip of the pin 40, the axis of the outer connecting hole 44 and the pin 40 can be easily aligned.
Further, a chamfered portion 56 whose diameter decreases toward the end surface 52 is provided at a portion where the outer peripheral surface 47 a and the end surface 52 of the pin 40 are connected. When the outer plate 42 is assembled to the shaft end of the pin 40, the outer connecting hole 44 is guided by the chamfered portion 56, so that the axial centers of the outer plate 42 and the pin 40 can be more easily aligned. it can.

  Next, the outer plate 42 is pushed in the axial direction, and the outer connecting hole 44 is fitted into the locking portion 48. Since the interference of the fitting portion between the outer connecting hole 44 (minimum inner diameter dimension D1) and the outer peripheral surface 47a (outer diameter dimension D0) of the retaining portion 47 is small, the outer plate 42 can be easily attached to the retaining portion 47. Can be press-fitted into. Therefore, a large press-fitting device is not required, and the outer plate 42 can be easily assembled to the locking portion 48 of the pin 40 using a simple manual press device or the like.

Further, the axial length of the retaining portion 47 is about 5 mm, and its axial length is short. For this reason, the work of press-fitting the outer plate 42 to the diameter stop portion 48 can be completed instantaneously. Therefore, the outer plate 42 can be easily assembled to the pin 40.

  The axial dimension W1 of the locking portion 48 (the dimension between the inner side surface 48c and the outer side surface 48b) is set to be larger than the thickness W0 of the outer plate 42. For this reason, since the outer plate 42 does not interfere with the inner side surface 48 c and the outer side surface 48 b, the outer connecting hole 44 can be securely fitted to the diameter stop portion 48.

  When the outer plate 42 is press-fitted into the diameter stop portion 48, the outer connection hole 44 is instantaneously changed from the state in which the outer plate 42 is engaged with the retaining portion 47 to the state in which the outer plate 42 is engaged with the locking portion 48. The interference between the pin 40 and the outer peripheral surface of the pin 40 is reduced. When the interference is reduced, the force for press-fitting the outer plate 42 into the pin 40 changes abruptly, so that the press-fitting of the outer plate 42 can be easily detected. As a result, problems such as insufficient press-fitting amount can be reliably prevented.

In the second subunit 55, the outer plate 42 is disposed inward in the axial direction of the retaining portion 47. Since the outer diameter dimension of the retaining portion 47 is larger than the inner diameter dimension of the outer connecting hole 44, it is possible to effectively prevent the outer plate 42 from slipping out of the pin 40.
In addition, since the chamfered portion is not provided at the portion where the outer surface 48b and the outer peripheral surface 47a are continuous, the guide portion for aligning the outer connecting hole 44 and the outer peripheral surface 47a is not formed. For this reason, the outer plate 42 is more difficult to come off.

  The second subunit 55 is assembled by the method described above. By repeating the above operation for the other subunits 45, 45 in the circumferential direction, it is possible to assemble a chain type retainer 49 that is annularly integrated.

In FIG. 3, the auxiliary plate 20 is used to connect the pins 40 at the positions (a) and (b).
The auxiliary plate 20 has a shape in which the plate 25 and the plate 26 whose positions are shifted in the thickness direction are joined together. The shape seen from the direction of the arrow P is substantially rectangular. The surface 25a where the plate 25 faces the outer plate 42 and the surface 26a where the plate 26 faces the inner plate 41 are formed so as to exist on the same plane (a plane imaginary in space).

Two auxiliary connecting holes 21 and 22 are formed in the auxiliary plate 20 at positions separated from each other in the longitudinal direction. The auxiliary connecting hole 21 formed in the plate 25 has the same shape as the inner connecting hole 43 formed in the inner plate 41, and the auxiliary connecting hole 22 formed in the plate 26 is formed on the outer plate 42. It has the same shape as the connecting hole 44.
The fitting of the auxiliary connecting hole 21, the support member 46, and the auxiliary connecting hole 22 with the retaining portion 47 and the locking portion 48 is the same as in the case of the inner plate 41 or the outer plate 42, respectively, and description thereof is omitted. To do.
The auxiliary plate 20 is used when the number of cylindrical rollers 4 incorporated in the cylindrical roller bearing 1 is an odd number. When the number of cylindrical rollers 4 is an even number, the outer connecting hole 44 at the position (a) may be engaged with the pin 40 at the position (b), so the auxiliary plate 20 is not necessary.

Thus, in the chain type retainer 49 of the first embodiment, the pin 40 and the outer plate 42 are simply fitted into the locking portion 48 after the outer plate 42 is press-fitted into the retaining portion 47 formed at the shaft end of the pin 40. Can be connected. For this reason, since the outer plate 42 can be mounted in a shorter time compared with a method in which the tip of the pin is threaded and a nut is mounted, the number of man-hours required for the assembly work can be reduced. The effect of reducing the number of man-hours is particularly great when the above assembling work must be repeated many times because of the large number of rolling elements, such as a large rolling bearing.
Furthermore, by making the inner peripheral surface of the outer connecting hole 44 into a tapered shape, the number of man-hours required for the assembly work can be further reduced. This is because the outer connecting hole 44 and the pin 40 can be easily positioned by the inner peripheral surface on the taper.
After the outer plate 42 is once fitted into the locking portion 48, the retaining portion 47 having a large diameter is provided on the outer side in the axial direction from the locking portion 48, so that the outer plate 42 can be effectively removed. Can be prevented.

(Second Embodiment)
A chain type retainer 19 according to the second embodiment will be described with reference to FIGS. FIG. 3 is an enlarged view of a main part of the chain type retainer 19. FIG. 4 is a development view developed on a plane as viewed from the outside in the radial direction in order to explain the structure of the chain type retainer 19. In FIG. 4, the upper side from the cylindrical roller 4 is in a state before assembly, and the lower side is in a state after assembly.
The chain type retainer 49 of the first embodiment is formed by alternately connecting the first subunit 45 and the second subunit 55 in the circumferential direction. On the other hand, the chain type retainer 19 of the second embodiment is different from the first embodiment in that the “support member” is formed only by the pins 10, and the adjacent third subunit 15 is replaced only by the outer plate 12. It is formed by connecting directly. The cylindrical roller 4 is supported by a pin 10 as a support member so as to be able to roll.

The third subunit 15 will be described by taking the third subunit incorporated at the positions (d) and (e) in FIG. 4 as an example.
The third subunit 15 includes two pins 10 and 10 and a pair of inner plates 11 and 11 that are connecting members that connect the shaft ends of the pins 10 and 10.

The pin 10 has a substantially cylindrical shape, and is manufactured by turning a carbon steel material, and then is hardened and hardened to a hardness of about 50 HRC.
As shown in FIG. 3, at both shaft end portions of the pin 10, a diameter stop portion 18 having a concave axial cross section is formed at a position inward in the axial direction from the shaft end. A portion sandwiched in the axial direction between the shaft end of the pin 10 and the diameter stop portion 18 is a retaining portion 17.
Since the shape of the shaft end portion of the pin 10 is the same on both sides in the axial direction, the shape of one shaft end portion will be described below.

  The locking portion 18 is formed of a bottom surface 18a, an outer surface 18b, and an inner surface 18c. The bottom surface 18 a is a cylindrical surface parallel to the axis of the pin 10. The outer side surface 18b is formed radially outward from the axially outer end of the bottom surface 18a at a right angle to the axis of the pin 10. The inner side surface 18 c is formed radially outward from the axially inner end of the bottom surface 18 a at a right angle to the axis of the pin 10. The axial length W1 of the locking portion 18 is larger than the thickness W0 of the outer plate 12.

The retaining portion 17 is formed by an outer peripheral surface 17 a, a chamfered portion 29, and an end surface 28. The radially outer end of the outer side surface 18 b is continuous with the outer peripheral surface 17 a of the retaining portion 17. The outer peripheral surface 17 a is a cylindrical surface that is coaxial with the axis of the pin 10. Thus, the outer diameter D0 of the outer peripheral surface 17a is larger than the outer diameter D2 of the bottom surface 18a of the locking portion 18.
The outer diameter of the bottom surface 18 a is smaller than the inner diameter of the outer connecting hole 14. This is because the outer plate 12 is incorporated so as to be rotatable around the pin 10.
The outer diameter D0 of the outer peripheral surface 17a is slightly larger than the inner diameter D1 on the small diameter side of the outer connecting hole 14. The size of the interference (D0-D1) is preferably about 1/1000 of the outer diameter D0 of the retaining portion 17 so that the outer connecting hole 14 can be easily press-fitted into the outer peripheral surface 17a of the pin 10. is there.

The portion sandwiched in the axial direction by the diameter stop portions 18, 18 formed at both axial end portions forms a column portion 27. The outer peripheral surface 27 a of the column part 27 has a cylindrical shape, and its outer diameter is slightly smaller than the inner diameter of the guide hole 9 of the cylindrical roller 4.
The axial length of the column part 27 is set to be slightly larger than the dimension of the axial length of the cylindrical roller 4 and the thickness of the two inner plates 11. A gap can be provided between the cylindrical roller 4 and the inner plate 11 on both axial sides.
Thus, the cylindrical roller 4 is held rotatably with respect to the pin 10.

When the cylindrical roller bearing 1 rotates, the outer peripheral surface 27 a of the column portion 27 is in sliding contact with the guide hole 9 of the cylindrical roller 4. In order to prevent wear of the sliding contact portion, the outer peripheral surface 27a is finished to a surface having a small roughness by grinding.

  The inner plate 11 and the outer plate 12 differ from the inner plate 41 and the outer plate 42 of the first embodiment only in the inner diameter dimensions of the inner connecting hole 13 and the outer connecting hole 14, respectively.

Next, the assembly procedure of the third subunit 15 will be described.
The third subunit 15 is assembled as follows. First, of the cylindrical rollers 4 incorporated between the inner ring 3 and the outer ring 2, the pins 10 and 10 are inserted into the guide holes 9 and 9 of the two adjacent cylindrical rollers 4 and 4. Next, the inner plate 11 is assembled from both axial sides of the pins 10 and 10. At this time, the inner connecting holes 13 and 13 are simultaneously press-fitted into the column portions 27 and 27. The inner plate 11 is press-fitted until the outer surface 11a is flush with the inner surface 18c of the locking portion 18 (see FIG. 3).
At this time, the inner side surface 11b of the inner plate 11 is incorporated so as to have a slight gap between the inner surface 11b and the end surface 8 of the cylindrical roller 4, so that the cylindrical rollers 4 and 4 can freely rotate around the pin 10. Can do.

  Thus, the third subunit 15 is assembled at the positions (d) and (e). Thereafter, the next third subunit 15 is assembled in the same manner for the other two adjacent rollers (for example, the rollers at the positions (b) and (c)). By sequentially performing this assembling operation, the plurality of third subunits 15 are assembled on the circumference of the cylindrical roller bearing 1.

  Next, a procedure for connecting the third subunit 15 and assembling the annular chain type retainer 19 will be described.

  At the positions (c) and (d), the outer connecting holes 14 and 14 of the outer plates 12 and 12 are simultaneously press-fitted into the shaft ends of the pins 10 and 10 from both ends of the pins 10 and 10 in the axial direction. 12 and 12 are assembled.

When the outer plate 12 is assembled to the shaft end of the pin 10, the outer plate 12 is arranged so that the large diameter opening side of the outer connecting hole 14 faces the retaining portion 17 of the pin 10. By doing so, the outer connecting hole 14 is guided at the tip of the pin 10, so that the axis of the outer connecting hole 14 and the pin 10 can be easily aligned.
Further, a chamfered portion 29 whose diameter decreases toward the end surface 52 is provided at a portion where the outer peripheral surface 17 a and the end surface 52 of the pin 10 are continuous. When the outer plate 12 is assembled to the shaft end of the pin 10, the outer connecting hole 14 is guided by the chamfered portion 29, so that the respective shaft centers of the outer plate 12 and the pin 10 can be more easily aligned. it can.

  Next, the outer plate 12 is pushed in the axial direction, and the outer connecting hole 14 is fitted to the locking portion 18. Since the interference between the outer connecting hole 14 (minimum inner diameter dimension D1) and the outer peripheral surface 17a (outer diameter dimension D0) of the retaining portion 17 is small, the outer plate 12 can be easily press-fitted into the retaining portion 17. I can do it. Therefore, a large press-fitting device is not required, and the outer plate 12 can be easily assembled to the locking portion 18 of the pin 10 using a simple manual press device or the like.

Moreover, the axial direction length of the retaining part 17 is about 5 mm, and the axial direction length is short. For this reason, the operation | work which press-fits the outer side plate 12 to the diameter stop part 18 can be completed instantaneously. Therefore, the outer plate 12 can be easily assembled to the pin 10.

  The axial dimension W1 of the locking portion 18 (the dimension between the inner side surface 18c and the outer side surface 18b) is set to be larger than the thickness W0 of the outer plate 12. For this reason, since the outer plate 12 does not interfere with the inner side surface 18 c and the outer side surface 18 b, the outer connecting hole 14 can be securely fitted to the diameter stop portion 18.

  In the chain type retainer 19 of the second embodiment, the outer diameter of the locking portion 18 is smaller than the inner diameter of the outer connecting hole 14. Therefore, the outer plate 12 and the pin 10 are bent with respect to each other about the axis of the pin 10.

  When the outer plate 12 is press-fitted into the diameter stop portion 18, the outer connection is performed at the moment when the outer plate 12 changes from being engaged with the retaining portion 17 to being engaged with the locking portion 18. The interference between the hole 14 and the outer peripheral surface of the pin 10 is reduced. When the interference is reduced, the force for press-fitting the outer plate 12 into the pin 10 changes abruptly, so that the press-fitting of the outer plate 12 can be easily detected. As a result, problems such as insufficient press-fitting amount can be reliably prevented.

Thus, the outer plate 12 is disposed inward in the axial direction of the retaining portion 17. Since the outer diameter dimension of the retaining portion 17 is larger than the inner diameter dimension of the outer connecting hole 14, it is possible to effectively prevent the outer plate 12 from slipping out of the pin 10.
In addition, since the chamfered portion is not provided at a portion where the outer surface 18b and the outer peripheral surface 17a are continuous, a guide portion for alignment between the outer connecting hole 14 and the outer peripheral surface 17a is not formed. For this reason, the outer plate 12 is more difficult to come off.

  By the procedure as described above, the outer connecting hole 14 is fitted with the locking portion 18, and the mounting of the outer plate 12 is completed. Thus, the adjacent third subunits 15 and 15 are connected by the outer plate 12. By repeating the above operation for the other subunits 15 and 15 in the circumferential direction, it is possible to assemble the chain type retainer 19 that is integrally formed in an annular shape.

Thus, in the chain type retainer 19 of the second embodiment, the outer plate 12 is press-fitted into the retaining portion 17 formed at the shaft end of the pin 10 and then fitted into the locking portion 18, so that the pin 10 and the outer plate 12 are fitted. Can be connected. For this reason, as in the case of the chain type retainer 49 of the first embodiment, the outer plate 12 can be mounted in a shorter time compared to the method of threading the tip of the pin and mounting the nut. The number of man-hours required for this can be reduced.
Furthermore, the chain type retainer 19 of the second embodiment is configured only by connecting the third subunit 15 with the outer plate 12. For this reason, since the 2nd subunit 55 in 1st Embodiment is not required, a number of parts can be reduced and the manufacturing cost of a chain type holder | retainer can be made low.

(Third embodiment)
Next, the chain type retainer 59 of the third embodiment will be described.
The developed view of the chain type retainer 59 of the third embodiment viewed from the outside in the radial direction is different from the developed view of the first embodiment (FIG. 2) only in the shape of the pin 50. It is common. The assembly procedure of the chain type cage 59 is the same as that of the chain type cage 49 of the first embodiment.
For this reason, about 3rd Embodiment, the same number is attached | subjected about the same component and only the coupling | bond part of the pin 50 which is a supporting member, and the outer side plate 42 which is a connection member is demonstrated.

FIG. 5 is a perspective view of the shaft end portion of the pin 50. FIG. 6 is a cross-sectional view when the pin 50 is cut at a position of the locking portion 58 in a direction perpendicular to the axis.
The chain type cage 59 of the third embodiment is different from the pin 40 of the first embodiment in that the locking portion 58 is formed on a part of the outer periphery of the pin 50.

The pin 50 has a substantially cylindrical shape. On the outer peripheral surface of the pin 50, a locking portion 58 is provided at a target position with respect to the axis.
The locking portion 58 has a shape in which a cross-sectional shape in a direction perpendicular to the shaft is recessed in a substantially half moon shape. The cross-sectional shape perpendicular to the axis of the pin 50 at the position of the locking portion 58 is formed by arcs 68a and 68a and strings 69a and 69a. The bottom surface 69 of the locking portion 58 includes a string 69 a and is a surface parallel to the axis of the pin 50.

  At both ends of the bottom surface 69 in the axial direction, an inner surface 53 and an outer surface 54 are formed in a direction perpendicular to the axis of the pin 50. A portion of the pin 50 closer to the shaft end than the outer side surface 54 is a retaining portion 57. The axial positions of the inner side surface 53 and the outer side surface 54 are the same as the inner side surface 48c and the outer side surface 48b of the first embodiment, respectively.

The procedure for assembling the outer plate 42 will be described with reference to FIG.
The outer plate 42 is inserted in the axial direction along the retaining portion 57. The shape of the retaining portion 57 of the third embodiment and the retaining portion 47 of the first embodiment are the same. Therefore, the outer plate 42 can be easily press-fitted into the pin 50. Furthermore, the outer plate 42 can be inserted into the locking portion 58 by inserting the outer plate 42 in the axial direction of the pin 50.

When the outer plate 42 is engaged with the locking portion 58, the portion of the inner peripheral surface of the outer connecting hole 44 that is fitted with the string 69a is reduced in diameter by elastic deformation. In FIG. 6, the radial displacement is shown enlarged for the sake of explanation. The shape of the outer connecting hole 44 when fitted to the locking portion 58 is indicated by a solid line, and the outer shape of the retaining portion 57 is indicated by a broken line.
Thus, the outer connecting hole 44 and the retaining portion 57 overlap each other at the cross-hatched portion Q, so that the outer plate 42 can be effectively prevented from slipping out of the pin 50.

And the latching | locking part 58 can prevent the intensity | strength fall of the pin 50 by arrange | positioning in the radial direction of the cylindrical roller bearing 1. FIG. This is because the cylindrical roller 4 is advanced and delayed when the cylindrical roller bearing 1 is rotating. That is, due to the advance and delay of the cylindrical roller 4, the inner plate 41 and the outer plate 42 approach or separate from each other in the circumferential direction of the cylindrical roller bearing 1. At this time, a bending force in the circumferential direction is generated in the locking portion 58.
By installing the locking portion 58 in the radial direction, the size of the locking portion 58 in the circumferential direction can be increased, so that a reduction in the strength of the pin 50 can be prevented.

As described above, the chain type retainer 59 of the third embodiment can be obtained by simply fitting the outer plate 42 into the retaining portion 57 formed at the shaft end of the pin 50 and then fitting it into the retaining portion 58. And the outer plate 42 can be connected. For this reason, as in the case of the chain type retainer 49 of the first embodiment, the outer plate 42 can be attached in a shorter time compared to the method of attaching the nut by threading the tip of the pin. The number of man-hours required can be reduced.
Furthermore, the chain type cage 59 of the third embodiment secures the diameter dimension of the pin 50 in the circumferential direction of the cylindrical roller bearing 1 by forming the locking portions 58 at two locations on the outer peripheral surface of the pin 50. ing. As a result, the strength of the pin 50 can be increased.

  Although this invention demonstrated the cylindrical roller bearing, it is not limited to this. For example, it can be applied to a tapered roller bearing. At this time, the size of the plates arranged on both sides in the axial direction of the tapered rollers is changed and combined in an annular shape. The interval between the connecting holes formed on the plate arranged on the large end side of the tapered roller is the interval between the connecting holes formed on the plate arranged on the small end side of the tapered roller according to the distance between the rollers on the large end side of the tapered roller. Can be easily achieved by adjusting the distance between the rollers on the small end side of the tapered roller.

1: cylindrical roller bearing, 2: outer ring, 3: inner ring, 4: cylindrical roller, 6: outer raceway surface, 7: inner raceway surface, 8: end face, 9: guide hole,
(First Embodiment) 40: Pin (inner shaft), 41: Inner plate, 42: Outer plate, 43: Inner connecting hole, 44: Outer connecting hole, 45: First subunit, 46: Roller support member (outer Cylinder), 47: retaining part, 48: locking part, 49: chain type retainer, 51: pillar part, 55: second subunit,
(2nd Embodiment) 10: Pin, 11: Inner plate, 12: Outer plate, 13: Inner connecting hole, 14: Outer connecting hole, 15: Third subunit, 17: Stopping part, 18: Locking part , 19: Chain type retainer, 20: Auxiliary plate, 21, 22: Auxiliary connection hole, 25, 26: Plate, 27: Column, 28: End face (third embodiment) 50: Pin, 52: End face, 57 : Stopping part, 58: Locking part, 59: Chain type cage

Claims (5)

A support member having an axis and penetrating through the rolling element and rotatably supporting the rolling element around the axis;
In both outer sides of the rolling element in the axial direction, it has a connecting member that connects the supporting members adjacent to each other,
In the chain type cage in which the connecting member is disposed over the entire circumference in the circumferential direction,
The connecting member has a flat plate shape and has a circular connecting hole penetrating in the thickness direction,
The support member has a retaining portion and a locking portion at both shaft end portions,
The retaining portion has a cylindrical shape, and an outer diameter thereof is larger than an inner diameter of the connection hole.
The locking portion has a cylindrical shape, and the axial width is formed to be larger than the thickness of the connecting member inwardly in the axial direction from the retaining portion.
The outer diameter of the locking part is smaller than the outer diameter of the retaining part,
The connecting member is a chain type cage that is fitted to the locking portion. A support member having an axis and penetrating through the rolling element and rotatably supporting the rolling element around the axis;
In a chain type retainer having a connecting member for connecting adjacent support members to each other on both outer sides of the rolling element in the axial direction, and the connecting member is disposed over the entire circumference in the circumferential direction. ,
The support member has an outer cylinder and an inner shaft that are fitted coaxially and are rotatable around the axis.
The connecting member has a flat plate shape and has a circular connecting hole penetrating in the thickness direction,
The inner shaft has a retaining portion and a locking portion at both shaft end portions,
The retaining portion has a cylindrical shape, and an outer diameter thereof is larger than an inner diameter of the connection hole.
The locking portion has a cylindrical shape, and the axial width is formed to be larger than the thickness of the connecting member inwardly in the axial direction from the retaining portion.
The outer diameter of the locking part is smaller than the outer diameter of the retaining part,
Of the pair of connecting members adjacent in the circumferential direction across the support member,
One connecting member is locked to the outer cylinder,
A chain type retainer in which the other connecting member is fitted to the locking portion on the outer side in the axial direction than the one connecting member. A support member having an axis and penetrating through the rolling element and rotatably supporting the rolling element around the axis;
In both outer sides of the rolling element in the axial direction, it has a connecting member that connects the supporting members adjacent to each other,
In the chain type cage in which the connecting member is disposed over the entire circumference in the circumferential direction,
The connecting member has a flat plate shape and has a circular connecting hole penetrating in the thickness direction,
The support member is
Each shaft end has a retaining part and a locking part,
The retaining portion has a cylindrical shape, and an outer diameter thereof is larger than an inner diameter of the connection hole.
The locking portion has a cylindrical shape, and the axial width is formed to be larger than the thickness of the connecting member inwardly in the axial direction from the retaining portion.
The outer diameter of the locking part is smaller than the outer diameter of the retaining part,
Of the pair of connecting members adjacent in the circumferential direction across the support member,
One connecting member is locked to the support member,
A chain type cage in which the other connecting member is fitted to the locking portion on the outer side in the axial direction than the one connecting member. The chain type retainer according to any one of claims 1 to 3, wherein an outer diameter of the engaging portion is smaller than an inner diameter of the connecting hole of the connecting member fitted to the engaging portion. The chain according to any one of claims 1 to 4, wherein an inner diameter dimension of the connection hole is sequentially enlarged in a thickness direction of the connection member, and a large-diameter opening is directed inward in the axial direction. Mold holder.

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