JP2007247814A - Split type rolling bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a split type rolling bearing to be assembled without restricting its assembling efficiency, while reducing its dragging resistance during the operation of the bearing and suppressing the vibration, noises and breakage of split portions of a cage due to the collision of their circumferential end faces with each other during the operation of the bearing. <P>SOLUTION: Fitted shape portions 22a, 22b fitted to each other via the split portions 21 of the cage 20 are integrally connected to each other by axially fitting a connection pin 23 into a fitting-in hole 24 formed in the fitted shape portions 22a, 22b along the axial direction. In the state that the connection pin 23 is not axially fitted into the fitted shape portions 22a, 22b, one split portion 21 of the cage 20 can be opened/closed between the fitted shape portions 22a, 22b with the connection pin 23 of the other split portion 21 as a supporting point. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a split rolling bearing for rotatably supporting a crankshaft of an automobile engine, for example, in which a raceway and a cage of a rolling element are divided at least in the circumferential direction.

  In general, a sliding bearing is used as a bearing that rotatably supports a crankshaft and a camshaft of an internal combustion engine such as an automobile engine. However, in recent years, more fuel-saving internal combustion engines have attracted attention from the viewpoint of effective use of resources and reduction of carbon dioxide.

  Therefore, there is an attempt to reduce power loss in the internal combustion engine by using a rolling bearing having a smaller drag resistance instead of the sliding bearing (see Patent Document 1). In particular, in DOHC type and V type automobile engines, the number of camshafts increases due to the structure. Therefore, by changing the bearing supporting the camshaft from a slide bearing to a rolling bearing, an improvement in fuel efficiency is expected. .

By the way, the camshaft of the internal combustion engine is usually formed with a pair of cam lobes for each cylinder, and the journal portion supported by the rolling bearing is disposed between the cam lobes or between the cam lobe and the end large diameter portion. . For this reason, a normal rolling bearing has a problem that it cannot be attached to the journal portion through a cam lobe or the like that protrudes to the outer diameter side.
Therefore, it is considered to divide the cage of the rolling bearing in the circumferential direction and incorporate it into the journal portion from the outer diameter side without passing a cam lobe or the like as in the case of a conventionally used sliding bearing (patent) Reference 2).

Conventionally, split-type rolling bearings are known (see, for example, Patent Document 3).
Referring to FIG. 8, for example, a roller bearing 100 disclosed in Patent Document 3 includes a plurality of rollers 101, approximately semi-cylindrical cages 102 and 103 that are divided in the circumferential direction, a cylinder head 104, and a cap 105. And the outer races 106 and 107 having a substantially semi-cylindrical shape that is divided in the circumferential direction. The inner peripheral surface of the outer race 106 becomes a raceway surface of the roller 101.
Both ends in the circumferential direction of the cage 102 are formed in a waveform (unevenness) similar to a sine curve, and both ends in the circumferential direction of the cage 103 facing this are formed in a complementary waveform (unevenness). ing. One end in the circumferential direction of the outer race 106 has a wedge shape and the other end has a valley shape. One end in the circumferential direction of the outer race 107 facing the outer race 106 has a complementary valley shape, and the other end has a complementary wedge shape. .

  FIG. 8 is an exploded perspective view of a main part showing the periphery of a cam shaft of a cylinder head to which the roller bearing disclosed in Patent Document 3 is applied.

  As in the roller bearing 100 described in Patent Document 3 described above, in the split roller bearing in which the race ring and the cage are divided into two parts, due to the collision between the circumferential end surfaces at the time of bearing operation in each divided part of the cage. Vibration, noise, damage, etc. are problems.

  As a countermeasure, referring to FIG. 9, for example, as disclosed in Patent Document 4, in each divided portion 111 of the roller bearing split cage 110 constituted by a pair of semi-annular holding members 110a and 110b. By applying coating materials 112a and 112b having a predetermined thickness on the circumferential end faces, the gaps between the circumferential end faces of the divided portions 111 are reduced, and the impact due to the collision is absorbed.

  FIG. 9 is a partially cutaway front view showing the roller bearing split cage disclosed in Patent Document 4. As shown in FIG.

  Referring to FIG. 10, for example, as disclosed in Patent Document 5, the split type rolling bearing retainer 120 divided into two in the circumferential direction is formed in the split portion 121 a of the retainer divided body 121. The bolts 124 are inserted into the through holes 123 formed, and the bolts 124 are screwed into the female screw holes 125 formed in the split part 122a of the cage divided body 122, whereby the split parts 121a and 122a are connected. There are things that are combined. Each bolt 124 is disposed along the tangential direction of the outer peripheral surface of the split type rolling bearing retainer 120.

  In such a split-type rolling bearing retainer 120, the split part 121a, 122a is coupled by the bolt 124, so that vibration, noise, breakage, etc. caused by the collision of the split part 121a, 122a during the bearing operation. Is prevented.

10A and 10B are diagrams showing a split type rolling bearing cage disclosed in Patent Document 5, wherein FIG. 10A is a perspective view, and FIG.
JP-A-8-128306 JP 2001-12214 A Japanese Patent Laying-Open No. 2005-90696 (page 6, FIG. 2) Japanese Utility Model Publication No. 6-6746 (pages 2 and 3, Fig. 1) JP 2000-320557 A (page 3, FIG. 1)

  However, even in the conventional split roller cage 110 for roller bearings shown in FIG. 9 described in Patent Document 4 described above, the impact caused by the collision between the circumferential end surfaces of the divided portions 111 is reduced by the coating materials 112a and 112b. There is a problem that it cannot be reduced to a level that does not adversely affect the performance.

Further, in the conventional split type rolling bearing retainer 120 shown in FIG. 10 described in Patent Document 5 described above, the slit portions 121 a and 122 a are coupled by bolts 124. As a result, vibration, noise, breakage, and the like due to the collision between the slit portions 121a and 122a during the bearing operation can be prevented.
However, since each bolt 124 is arranged along the tangential direction of the outer peripheral surface of the split type rolling bearing retainer 120, even if one of the two bolts 124 is not assembled, The gaps 121a and 122a of the split type rolling bearing retainer 120 cannot be opened. Therefore, when incorporated as a bearing for a crankshaft or a camshaft, there is a problem that a great restriction is imposed on the assemblability.

  The present invention can be incorporated, for example, as a bearing for supporting a crankshaft or a camshaft of an automobile engine without any restriction on assembling ability, and can reduce drag resistance during operation of the bearing. However, an object of the present invention is to provide a split type rolling bearing that can suppress vibration, noise, breakage, and the like due to collision between circumferential end faces during bearing operation in each split portion of the cage.

The above object of the present invention is achieved by the following configurations.
(1) In a split type rolling bearing in which the raceway and the cage of the rolling element are divided at least in the circumferential direction,
A fitting shape part that connects the corresponding divided parts by being formed in each of the divided parts of the cage divided into at least two in the circumferential direction and being fitted to each other;
A fitting insertion hole drilled along the axial direction in the fitting shape part fitted to each other in each divided part of the cage;
It is inserted from the axial direction into the fitting insertion hole, and includes a connecting material for connecting the fitting shape parts to each other,
In a state where the connecting material is not inserted into each fitting shape portion from the axial direction in at least one divided portion in the cage, the fitting shape in which the connecting material is not inserted using at least one other connecting material as a fulcrum. A split type rolling bearing characterized in that it can be opened and closed between parts.

  In the split-type rolling bearing described in (1) above, when the split-type rolling bearing is mounted on the shaft, the cage is at least in a state in which the connecting material is not inserted into the fitting insertion hole of at least one fitting shape portion. With the connecting material at one place as a fulcrum, the fitting shape portions where the connecting material is not inserted are opened, and the fitting material is attached to the shaft through the opened fitting shape portions. After the mounting to the shaft, the cage is closed between the fitting shape portions where the connecting material is not inserted, with at least one connecting material as a fulcrum, and the connecting material is inserted into each closed fitting shape portion. .

As a result, the cage is quickly and surely attached to the shaft without any restrictions on assemblability, and then the corresponding divided parts are integrally connected with each other by a connecting material, so that the bearing operation in each divided part is achieved. Vibration, noise, breakage, and the like due to collision between circumferential end faces at the time are suppressed.
In addition, as for the fitting shape part of a cage | basket and a connection material, it is desirable to consider respectively mass balance. Moreover, as a material of the connecting material, ceramic, metal, resin, or the like is preferably used.

  (2) In each divided portion of the cage, one of the fitting shape portions to be fitted to each other is formed into a convex shape protruding substantially in the center in the axial direction, and the other of the fitting shape portions is The split type rolling bearing according to (1), wherein the split rolling bearing is formed in a concave shape corresponding to one convex shape of the fitting shape portion.

  In the split type rolling bearing described in (2) above, the convex shape protruding from the approximate center of one axial direction of the fitting shape portion is fitted into the other concave shape of the fitting shape portion. Thereby, one side and the other of the fitting shape part are reliably fitted, and corresponding division parts are connected.

  (3) In each divided portion of the cage, one of the fitting shape portions fitted to each other is formed in a triangular shape having the substantially center in the axial direction as a vertex, and the other of the fitting shape portions is The split type rolling bearing according to (1), wherein the split type rolling bearing is formed in an inverted triangular shape corresponding to one triangular shape of the fitting shape portion.

  In the split rolling bearing described in (3) above, the triangular shape having the apex at the approximate center of one axial direction of the fitting shape portion is fitted to the other inverted triangle shape of the fitting shape portion. Thereby, one side and the other of the fitting shape part are reliably fitted, and corresponding division parts are connected. Moreover, positioning of the insertion hole of the connecting material inserted in the fitting shape portion is easily performed.

  (4) In each divided portion of the cage, one of the fitting shape portions to be fitted with each other is formed in a hook shape, and the other of the fitting shape portions is in one hook shape of the fitting shape portion. The split type rolling bearing according to (1), wherein the split type rolling bearing is formed in a corresponding shape.

  In the split type rolling bearing described in (4) above, one fitting shape portion formed in a hook shape and the other fitting shape portion formed in a shape corresponding to the hook shape are fitted, and the key is engaged. Since it locks with a shape part, a holder does not shift to the peripheral direction at the time of connecting material insertion. Moreover, if a mutual fitting shape part is the structure latched by a hook-shaped part, a division | segmentation part can also be connected without using a connection material.

  (5) The split type rolling bearing according to any one of (1) to (4), wherein the cage is split into two in the circumferential direction by a split portion.

  In the split type rolling bearing described in (5) above, when the split type rolling bearing is mounted on the shaft, the cage is in a state in which the connecting material is not inserted into one of the fitting shape portions of the two split portions. The connecting material inserted into the fitting shape portion of the other divided portion is used as a fulcrum, and the gap between the fitting shape portions of the one divided portion is opened, and the gap between the fitting shape portions of the one divided portion is opened. Is attached to the shaft. After the mounting to the shaft, the cage is closed again between the fitting shape portions of one split portion, with the connecting material inserted into the fitting shape portion of the other split portion as a fulcrum. A connecting material is inserted into each fitting shape portion of the divided portion.

  As a result, the cage is quickly and surely attached to the shaft without any restrictions on assemblability, and then the corresponding divided parts are integrally connected with each other by a connecting material, so that the bearing operation in each divided part is achieved. Vibration, noise, breakage, and the like due to collision between circumferential end faces at the time are suppressed.

(6) The method for assembling the split type rolling bearing according to any one of (1) to (4),
In the state where the connecting material is not inserted into the fitting shape portion by at least one divided portion, the cage is opened between the fitting shape portions where the connecting material is not inserted using at least one connecting material as a fulcrum. In addition, it is attached to the shaft through the opened fitting shape portion, and after being attached to the shaft, the fitting shape portion where the connecting material is not inserted is closed with at least one connecting material as a fulcrum, A method of assembling a split type rolling bearing, wherein a connecting material is inserted into each closed fitting shape portion.

  In the assembling method of the split type rolling bearing described in the above (6), the cage is quickly and surely attached to the shaft without any restrictions on the assemblability, and then the corresponding split portions are integrated with a connecting material. By being connected to, vibration, noise, breakage, and the like due to the collision between the circumferential end faces during the bearing operation in each divided portion are suppressed.

(7) The method of assembling the split type rolling bearing according to any one of (1) to (4),
In the state where the connecting material is not inserted into the fitting shape portion by at least one divided portion, the cage is opened between the fitting shape portions where the connecting material is not inserted using at least one connecting material as a fulcrum. In addition, it is attached to the shaft through the opened fitting shape portion, and after being attached to the shaft, the fitting shape portion where the connecting material is not inserted is closed with at least one connecting material as a fulcrum, A method for assembling a split-type rolling bearing, characterized by being coupled.

  In the assembling method of the split type rolling bearing described in the above (7), the cage is quickly and surely attached to the shaft without any restrictions on assembling properties, and the corresponding split portions are not connected to each other using a connecting material. By being connected to each other only by fitting, vibration, noise, breakage, and the like due to collision between circumferential end surfaces during bearing operation in each divided portion are suppressed. By being connected only by fitting, the assembling work can be simplified as compared with the case of using a connecting material.

(8) The method for assembling the split type rolling bearing according to (5),
The retainer is in a state in which the connecting material is not inserted into one fitting shape portion of the two divided portions, and the connecting material inserted into the fitting shape portion of the other divided portion is used as a fulcrum. The fitting part of the split part is opened and attached to the shaft through the open fitting part of one split part, and after fitting to the shaft, the other split part is fitted again The connecting material inserted into the shape part is used as a fulcrum, the fitting shape parts of one divided part are closed, and the connecting material is inserted into each fitting shape part of one closed divided part. Assembling method of split type rolling bearing.

  In the assembling method of the split type rolling bearing described in the above (8), the cage is quickly and surely attached to the shaft without any restrictions on the assemblability, and then the corresponding split portions are integrated with a connecting material. By being connected to, vibration, noise, breakage, and the like due to the collision between the circumferential end faces during the bearing operation in each divided portion are suppressed.

According to the split type rolling bearing of the present invention, for example, as a bearing for supporting a crankshaft or a camshaft of an automobile engine, it can be incorporated without any restrictions on assembling performance, and the drag resistance during the operation of the bearing can be reduced. Although it can be achieved, it is possible to suppress vibration, noise, breakage, and the like due to the collision between the circumferential end faces at the time of bearing operation in each divided portion of the cage.
The split type rolling bearing obtained by the present invention is suitably used for supporting a crankshaft of an automobile engine when low vibration, low torque, high load resistance, and high durability are required.

Hereinafter, the present invention will be described with reference to illustrated embodiments.
FIG. 1 is an enlarged perspective view of a main part showing a state before connection of a split portion of a cage of a split type rolling bearing according to a first embodiment of the present invention, and FIG. 2 is a view of the split type rolling bearing of FIG. The principal part top view which shows the state at the time of the connection of the division | segmentation part of a holder | retainer, FIG. 3 is a schematic side view which shows the state before mounting | wearing to the axis | shaft of the holder | retainer of the division | segmentation type rolling bearing of FIG.

  Referring to FIGS. 1 to 3, a split type rolling bearing 10 includes a plurality of rollers (not shown) arranged in the circumferential direction and an annular outer ring (tracking ring, illustrated) having a raceway surface of each roller on the inner circumference. And a retainer 20 that is disposed on the inner peripheral side of the outer ring and holds each roller in a rollable manner, and is used as a bearing that supports a crankshaft (not shown) of an automobile engine. The split roller bearing 10 includes an outer ring and a cage 20 that are equally divided into two in the circumferential direction. Each divided portion 21 of the cage 20 has a fitting shape portion 22 that connects the corresponding divided portions 21 to each other. Is provided.

  That is, in each divided portion 21 of the cage 20, one of the fitting shape portions 22 to be fitted to each other (on the right side in FIGS. 1 and 2) has a convex shape protruding substantially in the center in the axial direction. While being formed, the other 22 b (left side in FIGS. 1 and 2) of the fitting shape portion 22 is formed in a concave shape corresponding to the convex shape of the one 22 a of the fitting shape portion 22. The convex shape of one side 22a of the fitting shape portion 22 is fitted into the concave shape of the other shape 22b of the fitting shape portion 22, and the one 22a and the other 22b of the fitting shape portion 22 are securely fitted. Thereby, corresponding division parts 21 are connected.

  A connecting pin 23 made of ceramic, metal, resin, or the like is fitted to each fitting shape portion 22a, 22b in the axial direction (see FIG. 2, the fitting shape holes 22 a and 22 b are integrally connected to the fitting insertion hole 24 formed along the vertical direction in FIG. 2 from the axial direction (vertical direction in FIG. 2). Here, in one state (upper side in FIG. 3) of the retainer 20, in the state shown in FIG. 3 in which the connecting pin 23 is not inserted into the fitting shape portions 22a and 22b from the other side (FIG. 3). 3, with the connecting pin 23 of the divided portion 21 on the lower side as a fulcrum, the fitting shape portions 22 a and 22 b of one divided portion 21 can be opened and closed in the left-right direction in FIG. 3. FIG. 3 shows a state where the upper divided portion 21 is slightly opened with the lower divided portion 21 as a fulcrum.

  In order for the fitting shape portions 22a and 22b to turn around the connecting pin 23, the tip of one convex fitting shape portion 22a does not interfere with the other concave fitting shape portion 22b. It is a curved surface. Conversely, the tip of the concave fitting shape portion 22b may be a curved surface, and the tips of the mutual fitting shape portions 22a and 22b may be curved.

The operation of this embodiment will be described.
When the split type rolling bearing 10 is mounted on a shaft (not shown), the cage 20 is in a state in which the connecting pin 23 is not inserted into the fitting shape portions 22a and 22b of the one split portion 21 (upper side in FIG. 3). Thus, between the fitting shape portions 22a and 22b of one divided portion 21, with the connecting pin 23 fitted and inserted into the fitting shape portions 22a and 22b of the other divided portion 21 (lower side in FIG. 3) as a fulcrum. It opens in the left-right direction in FIG. In this state, the retainer 20 is attached to the shaft via the fitting shape portions 22a and 22b of the one divided portion 21 that is opened.

After mounting on the shaft, the retainer 20 is again fitted to the fitting shape portions 22a and 22b of the one split portion 21 with the connecting pin 23 inserted into the fitting shape portions 22a and 22b of the other split portion 21 as fulcrums. It ’s closed. And the connection pin 23 is inserted by the fitting shape parts 22a and 22b of one division part 21 closed.
As a result, the retainer 20 is quickly and surely attached to the shaft without any restrictions on assemblability, and then the corresponding divided portions 21 are integrally connected to each other by the connecting pins 23, whereby each divided portion is The vibration, noise, breakage, and the like due to the collision between the circumferential end faces during the bearing operation in 21 are suppressed.

FIG. 4 is a cross-sectional view of an essential part showing a state at the time of connecting the split portions of the cage of the split rolling bearing according to the second embodiment of the present invention.
Referring to FIG. 4, in each divided portion 31 of the cage 30 of the split type rolling bearing, a fitting shape portion 32 to be fitted to each other is formed in a wedge shape. That is, one side 32a (the left side in FIG. 4) of the fitting shape portion 32 is formed in a triangular shape having the apex at substantially the center in the axial direction, and the other 32b (the right side in FIG. 4) of the fitting shape portion 32. Is formed in an inverted triangle shape corresponding to the triangular shape of one side 32 a of the fitting shape portion 32.
In addition, the connecting pin 33 is axially (in the vertical direction in FIG. 4) in the fitting insertion hole 34 formed in each fitting shape portion 32a, 32b along the axial direction (in the vertical direction in FIG. 4). The fitting shape portions 32a and 32b are integrally connected to each other.

  By fitting the triangular shape of one side 32a of the fitting shape portion 32 into the inverted triangular shape of the other side 32b of the fitting shape portion 32, the one 32a and the other 32b of the fitting shape portion 32 are reliably fitted. The Accordingly, the corresponding divided portions 31 are connected to each other, and the fitting holes 34 of the connecting pin 33 to be fitted and inserted into the fitting shape portions 32a and 32b from the axial direction (vertical direction in FIG. 4) are shown in FIG. Positioning along the left-right direction is easily performed.

In addition, the tip of one triangular fitting shape portion 32a is connected to the other inverted triangular fitting shape portion 32b so that the fitting shape portions 32a and 32b can rotate about the connecting pin 33. It is curved so as not to interfere. Conversely, the tip of the inverted triangular fitting shape 32b may be a curved surface, and the tips of the mutual fitting shapes 32a and 32b may be curved.
Other configurations and operations are the same as those in the first embodiment.

  FIG. 5: is principal part sectional drawing which shows the state at the time of the connection of the division | segmentation part 41 of the holder | retainer 40 of the division | segmentation type rolling bearing which is 3rd Embodiment of this invention. This embodiment is a modification of the first embodiment, in which one convex fitting shape portion 42a is formed in a key shape, and the other concave fitting shape portion 42b is a key of the one fitting shape portion 42a. It is formed in a shape corresponding to the shape. The coupling shape portions 42a and 42b are locked to each other so that the coupling is fixed. When the coupling pin 43 is inserted, the coupling holes 44 are not displaced in the circumferential direction, and the coupling pin 43 can be easily moved. Can be inserted into the insertion hole 44.

  FIG. 6 is a cross-sectional view of a principal part showing a state at the time of connection of the split portion 51 of the cage 50 of the split type rolling bearing according to the fourth embodiment of the present invention. This embodiment is a modification of the first embodiment, in which one concave fitting shape portion 52b is formed in a hook shape, and the other convex fitting shape portion 52a is one of the fitting shape portions 52a. It is formed in a shape corresponding to a hook shape. Then, the coupling shape portions 52a and 52b are locked to each other so that the coupling is fixed. When the coupling pin 53 is inserted, the coupling holes 54 are not displaced in the circumferential direction, and the coupling pin 53 can be easily operated. Can be inserted into the insertion hole 54.

  In the third embodiment shown in FIG. 5 and the fourth embodiment shown in FIG. 6, the mutual fitting shape portions 42a, 42b, 52a, 52b are locked and fixed by the hook-like fitting shape portions 42a, 52b. The fitting shape portions 42a, 42b, 52a, 52b can be connected without using the connecting pins 43, 53. Therefore, as shown in FIG. 7, hook-shaped fitting portions 42a, 42b, 52a, 52b shown in FIGS. 5 and 6 are adopted for the upper connecting portions 41, 51 that do not serve as opening / closing fulcrums. , 53 may not be used. In addition, the lower connection portions 41 and 51 serving as pivot points in FIG. 7 do not employ the hook-shaped fitting shape portions 42a, 42b, 52a, and 52b shown in FIGS. , 53 may be used for connection. FIG. 7 shows a state in which the upper divided portions 41 and 51 are slightly opened with the lower divided portions 41 and 51 as fulcrums.

  As described above, according to each of the above-described embodiments, the fitting shape portions 22, 32, 42, 52 that are fitted to each other at the divided portions 21, 31, 41, 51 of the cage 20, 30, 40, 50 are provided. The connecting pins 23, 33, 43, 53 are formed in the fitting shape portions 22 a, 22 b, 32 a, 32 b, 42 a, 42 b, 52 a, 52 b along the axial direction (vertical direction in FIG. 2). The fitting holes 22, 22 b, 32 a, 32 b, 42 a, 42 b, 52 a, 52 b are inserted into the fitted holes 24, 34, 44, 54 from the axial direction (vertical direction in FIG. 2). Connect together. Here, in one of the split portions 21, 31, 41, 51 in the cage 20, 30, 40, 50 (upper side in FIGS. 3 and 7), the fitting shape portions 22a, 22b, 32a, 32b, 42a, In the state shown in FIGS. 3 and 7 in which the connecting pins 23, 33, 43, and 53 are not inserted into the axial direction from the connecting pins 23b, 52a, and 52b, the other divided parts 21 and 31 (lower side in FIGS. 3 and 7). 3 between the fitting shape portions 22a, 22b, 32a, 32b, 42a, 42b, 52a, 52b of one of the divided portions 21, 31, 41, 51 with the connecting pins 23, 33, 43, 53 of FIG. And it can open and close in the left-right direction in FIG.

  Therefore, for example, as a bearing that rotatably supports a crankshaft or camshaft of an automobile engine or the like, it can be incorporated without any restriction on assemblability, and can reduce drag resistance during operation of the bearing. However, it is possible to suppress vibration, noise, breakage, and the like due to the collision between the circumferential end faces during the bearing operation in the divided portions 21, 31, 41, 51 of the cages 20, 30, 40, 50.

  In each of the above-described embodiments, when the split type rolling bearing 10 is mounted on the shaft, the fitting shape portions 22a, 22b of the one split portions 21, 31, 41, 51 of the cages 20, 30, 40, 50 are provided. 32a, 32b, 42a, 42b, 52a, 52b, with the connecting pins 23, 33, 43, 53 not being inserted, the fitting shape portions 22a, 22b, 32a, With the connecting pins 23, 33, 43, and 53 inserted into the 32 b, 42 a, 42 b, 52 a, and 52 b as fulcrums, the fitting shape portions 22 a, 22 b, 32 a, and 32 b of the one divided portion 21, 31, 41, 51 are used. , 42a, 42b, 52a, 52b are opened, and between the fitting shape portions 22a, 22b, 32a, 32b, 42a, 42b, 52a, 52b of one of the opened divided portions 21, 31, 41, 51 are interposed. Te, the retainer 20, 30, 40 and 50 configured to mount the shaft is not limited to this.

  That is, when there is a restriction on the assembly location such as assembly to the crankshaft of an automobile engine, the cage 20, 30, 40, 50 is attached to the shaft by the procedure as described above. If there is no restriction on the location, the fitting shape portions 22a, 22b, 32a, 32b, 42a, 42b, 52a, 52b of the divided portions 21, 31, 41, 51 of the cages 20, 30, 40, 50 The connecting pins 23, 33, 43, and 53 are respectively inserted, and the divided parts 21, 31, 41, and 51 are integrally connected to the shaft in advance with the connecting pins 23, 33, 43, and 53 being integrally connected thereto. You can also.

  Moreover, in each said embodiment, the example which applied the integral connection structure via the connection pins 23, 33, 43, 53 to the holder | retainer 20, 30, 40, 50 equally divided into two in the circumferential direction. However, the same connection structure can also be applied to the outer ring that is equally divided into two in the circumferential direction of the split type rolling bearing.

It is a principal part expansion perspective view which shows the state before the connection of the division part of the holder | retainer of the division | segmentation type rolling bearing which is 1st Embodiment of this invention. It is a principal part top view which shows the state at the time of the connection of the division part of the holder | retainer of the division | segmentation type rolling bearing of FIG. It is a schematic side view which shows the state before mounting to the axis | shaft of the holder | retainer of the division | segmentation type rolling bearing of FIG. It is principal part sectional drawing which shows the state at the time of the connection of the division part of the holder | retainer of the division | segmentation type rolling bearing which is 2nd Embodiment of this invention. It is principal part sectional drawing which shows the state at the time of the connection of the division | segmentation part of the holder | retainer of the division | segmentation type rolling bearing which is 3rd Embodiment of this invention. It is principal part sectional drawing which shows the state at the time of the connection of the division part of the holder | retainer of the division | segmentation type rolling bearing which is 4th Embodiment of this invention. It is a schematic side view which shows the state before mounting | wearing the axis | shaft of the holder | retainer of the division | segmentation type rolling bearing of FIG.5 and FIG.6. It is a principal part disassembled perspective view which shows the surroundings of the cam shaft of the cylinder head to which the roller bearing currently disclosed by patent document 3 is applied. FIG. 6 is a partially cutaway front view showing a roller bearing split cage disclosed in Patent Document 4. It is a figure which shows the division | segmentation type rolling bearing retainer currently disclosed by patent document 5, (a) is a perspective view, (b) is principal part sectional drawing.

Explanation of symbols

10 Split type rolling bearing (split type roller bearing)
20, 30, 40, 50 Cage 21, 31, 41, 51 Dividing part 22, 32, 42, 52 Fitting shape part 22a, 32a, 42a, 52a One of the fitting shape parts 22b, 32b, 42b, 52b The other of the shaped part 23, 33, 43, 53 connecting material (connecting pin)
24, 34, 44, 54 Insertion hole

Claims (8)

In the split type rolling bearing in which the raceway and the cage of the rolling element are divided at least in the circumferential direction,
A fitting shape part that connects the corresponding divided parts by being formed in each of the divided parts of the cage divided into at least two in the circumferential direction and being fitted to each other;
A fitting insertion hole drilled along the axial direction in the fitting shape part fitted to each other in each divided part of the cage;
It is inserted from the axial direction into the fitting insertion hole, and includes a connecting material for connecting the fitting shape parts to each other,
In a state where the connecting material is not inserted into each fitting shape portion from the axial direction in at least one divided portion in the cage, the fitting shape in which the connecting material is not inserted using at least one other connecting material as a fulcrum. A split type rolling bearing characterized in that it can be opened and closed between parts.   In each divided portion of the cage, one of the fitting shape portions to be fitted to each other is formed in a convex shape protruding from the substantially center in the axial direction, and the other of the fitting shape portions is a fitting shape. 2. The split type rolling bearing according to claim 1, wherein the split type rolling bearing is formed in a concave shape corresponding to one convex shape of the portion.   In each divided portion of the cage, one of the fitting shape portions to be fitted to each other is formed in a triangular shape having the apex at substantially the center in the axial direction, and the other of the fitting shape portions is a fitting shape. The split type rolling bearing according to claim 1, wherein the split type rolling bearing is formed in an inverted triangular shape corresponding to one triangular shape of the portion.   In each divided portion of the cage, one of the fitting shape portions to be fitted to each other is formed in a hook shape, and the other of the fitting shape portions corresponds to one hook shape of the fitting shape portion. The split type rolling bearing according to claim 1, wherein the split type rolling bearing is formed as follows.   The split type rolling bearing according to any one of claims 1 to 4, wherein the cage is divided into two in the circumferential direction by a split portion. A method of assembling the split type rolling bearing according to any one of claims 1 to 4,
In the state where the connecting material is not inserted into the fitting shape portion by at least one divided portion, the cage is opened between the fitting shape portions where the connecting material is not inserted using at least one connecting material as a fulcrum. In addition, it is attached to the shaft through the opened fitting shape portion, and after being attached to the shaft, the fitting shape portion where the connecting material is not inserted is closed with at least one connecting material as a fulcrum, A method of assembling a split type rolling bearing, wherein a connecting material is inserted into each closed fitting shape portion. A method of assembling the split type rolling bearing according to any one of claims 1 to 4,
In the state where the connecting material is not inserted into the fitting shape portion by at least one divided portion, the cage is opened between the fitting shape portions where the connecting material is not inserted using at least one connecting material as a fulcrum. In addition, it is attached to the shaft through the opened fitting shape portion, and after being attached to the shaft, the fitting shape portion where the connecting material is not inserted is closed with at least one connecting material as a fulcrum, A method for assembling a split-type rolling bearing, characterized by being coupled. A method for assembling a split type rolling bearing according to claim 5,
The retainer is in a state in which the connecting material is not inserted into one fitting shape portion of the two divided portions, and the connecting material inserted into the fitting shape portion of the other divided portion is used as a fulcrum. The fitting part of the split part is opened and attached to the shaft through the open fitting part of one split part, and after fitting to the shaft, the other split part is fitted again The connecting material inserted into the shape part is used as a fulcrum, the fitting shape parts of one divided part are closed, and the connecting material is inserted into each fitting shape part of one closed divided part. Assembling method of split type rolling bearing.

Images