JP6736970B2 - Rolling bearing and combination of rolling bearing and coating cap - Google Patents

Description

The present invention relates to a rolling bearing. And a combination of a rolling bearing and a coating cap. In particular, the present invention relates to a rolling bearing that can be suitably used for a main roller of a sliding door of a vehicle such as an automobile.

A rolling bearing is used as a main roller that receives a radial load of a sliding door of a vehicle such as an automobile (see Patent Document 1 below). The main roller has an inner ring fixed to a support shaft attached to a slide door, and an outer ring rolling on a rail formed on the vehicle side. Since the main roller receives the load in the radial direction, a single row deep groove ball bearing is used.

As shown in FIG. 9, the rolling bearing 150 is composed of an inner ring 166, an outer ring 164, and a plurality of rolling elements 168 such as balls that are rollably arranged between the inner ring 166 and the outer ring 164. .. Then, in order to prevent or suppress the intrusion of foreign matter such as water into the inside of the rolling bearing 150, and to hold the grease filled in the bearing, seal members 180 are arranged at both sides of the rolling bearing 150. Is set up. The seal member 180 is usually fixedly attached to the inner diameter surface of the outer ring 164 and is arranged so as to be in sliding contact with the outer peripheral surface of the inner ring 166 to define an inner space in which the rolling element 168 exists from the outer space. .. The seal member 180 may be attached to the inner ring 166 and the outer ring 164 in reverse.

By the way, the rolling bearing 150, which is equipped as a main roller of a slide door, may be coated with rust or the like in a state where it is assembled to the slide door in a vehicle painting process. This coating is usually electrodeposition coating.

The outer ring 164 of the rolling bearing 150 is usually made of steel or stainless steel. Therefore, in the above coating, the outer peripheral surface of the outer ring 164 is coated. Since the outer peripheral surface of the outer ring 164 is a rolling surface, when paint adheres to the outer peripheral surface, when rolling on the rails of the rolling bearing 150, a step difference (unevenness) of the paint adhered to the outer ring 164 causes abnormal noise or noise. Vibration may occur. For this reason, measures have conventionally been taken to prevent the paint from adhering to the outer peripheral surface of the outer ring 164 during painting.

As a countermeasure against this, a coating cap 170 as shown in FIG. 9 is attached to the rolling bearing 150 during coating to prevent the coating material from adhering to the outer peripheral surface of the outer ring 164. The coating cap 170 is formed in a shape that encloses the seal member 180 on one side (one side) from the outer peripheral surface of the outer ring 164 of the rolling bearing 150 when viewed in the sectional shape shown in FIG. 9. And it is formed in a ring shape.

Accordingly, at the time of coating, the outer peripheral surface of the outer ring 164 can be closely adhered and covered by the coating cap 170, and the coating material can be prevented from adhering to the outer peripheral surface of the outer ring 164. As a result, the rolling bearing 150 rolls without generating abnormal noise or vibration, and the sliding door can be opened and closed smoothly.

Japanese Patent Laid-Open No. 2000-18266 JP, 2007-263265, A

The above-mentioned measure for preventing the coating cap 170 from adhering the coating material to the outer peripheral surface of the outer ring 164 does not cause any particular problem when the coating cap 170 is accurately applied during coating. However, when the coating is not performed accurately and the coating cap 170 is deposited in an incomplete state in a so-called floating state from the outer peripheral surface of the outer ring 164, the floating portion may be attached to the floating portion as shown in FIG. As shown by the arrow in FIG. 10, the paint may infiltrate, causing a problem that the paint adheres to the outer peripheral surface of the outer ring 164 at the portion indicated by the thick line.

The reason why the coating cap 170 is attached in a so-called floating state is considered to be as follows. First, the air and oil remaining inside the coating cap 170 are expanded by the heat of the coating drying furnace, and the coating cap 170 is extruded rightward as viewed in FIG. Further, the coating cap 170 is displaced due to contact with other adjacent components when the coating cap 170 is attached to the rolling bearing 150. Furthermore, it is possible that the coating cap 170 has not been attached since it has been pushed in from the beginning. It is difficult to solve all of these factors.

As shown in FIGS. 9 and 10, on the outer peripheral surface of the outer ring 164, the range that functions as a rolling surface is only the range of the central portion of the outer peripheral surface that is an outwardly convex arc shape. That is, the ranges at both ends do not function as rolling surfaces. Therefore, even if paint is attached, the rolling of the rolling bearing 150 is not affected.

Further, the coating cap 170 is not formed so as to cover the seal member 180 side on the left side in FIG. 9. This is because of the mounting reason for mounting the coating cap 170 on the rolling bearing 150, but even in such a case, the coating is configured as follows so that the coating does not enter. That is, even if the paint may adhere to the end surface portion by interference-fitting the opening end surface of the coating cap 170 within a range that does not affect the rolling of the end surface of the outer peripheral surface of the outer ring 164 described above, It is designed to prevent the infiltration of paint into the central area that affects rolling.

Thus, the present invention was devised to solve the above-mentioned problems, and the problem to be solved by the present invention is. Prevents or suppresses paint from sticking to the area that affects rolling on the outer peripheral surface of the outer ring of the rolling bearing, even if the coating cap cannot be reliably applied by blocking the paint infiltration route. It is in.

In order to solve the above problems, the present invention takes the following means.

In the rolling bearing according to the present invention, first, an inner ring, an outer ring, a plurality of rolling elements rotatably provided between the inner ring and the outer ring, and a space in which the rolling elements exist are defined as the outside. And a seal member disposed on both sides of the.

The seal member of the rolling bearing is fixed to either one of the inner ring and the outer ring and is arranged so as to be in sliding contact with the other, and at least the outer side in the axial direction of the seal member on one side. The end surface on one side is provided with an annular projecting portion that projects outward in the axial direction, and the projecting portion of the seal member is the seal member on one side from the outer peripheral surface of the outer ring of the rolling bearing. In a state in which the coating cap formed so as to surround is covered, the coating cap is prevented or suppressed from infiltrating in the outer peripheral surface direction of the outer ring in a state of elastic contact with the coating cap.

According to the above invention, the protruding portion is formed on the seal member on the side to which the coating cap is attached. The projecting portion blocks the paint infiltration path formed between the coating cap and the seal member at the time of painting, so that infiltration of the paint is prevented or suppressed. As a result, it is possible to prevent or suppress the adhesion of the paint to the range (see FIGS. 9 and 10) that functions as the rolling surface on the outer peripheral surface of the outer ring of the rolling bearing.

Particularly, according to the above invention, the protruding portion formed on the seal member is disposed in elastic contact with the coating cap. For this reason, even if the coating cap is not firmly attached to the rolling bearing, that is, even if it is incompletely attached, it can be brought into contact by elastic contact, and the paint infiltration can be prevented. Block the route. As a result, even when the adhered state is not surely performed, the paint infiltration route during coating is blocked, and the infiltration of the paint is prevented or suppressed.

The above-described present invention preferably has the following modes.

First, it is preferable that the outer diameter shape of the annular protruding portion is a shape that decreases toward the outer side in the axial direction. According to this aspect, when the air in the sealed space inside the coating cap expands, the pressure easily escapes.

Next, the seal member includes a seal head that is locked to a radially inner surface of the outer ring, and a seal lip that is in sliding contact with a radially outer surface of the inner ring, and the protruding portion is the seal lip. More preferably, it is provided at a position closer to the seal head. According to this aspect, it is possible to reduce the amount of air accumulated in the sealed space inside the coating cap. Further, when the vehicle is used, the water adhering to the protruding portion is located away from the position of the seal lip of the seal member, and therefore does not flow from the position of the seal lip.

The present invention can also be configured as a combination of a rolling bearing and a coating cap. The structure is such that an inner ring, an outer ring, a plurality of rolling elements provided so as to be able to roll between the inner ring and the outer ring, and a space in which the rolling elements are present are defined on both sides to the outside. And a coating cap formed to surround the seal member on the one side from the outer peripheral surface of the outer ring of the rolling bearing, and the one side of the rolling bearing. Between the sealing member and the coating cap disposed facing the sealing member on the one side, one of the sealing member on the one side and the coating cap protrudes from the other toward the other. Is formed so that the protruding portion is in elastic contact with the other. Also in the combination structure, the same operation as the invention described first as the means of the present invention works.

According to the present invention of the above-mentioned means, by covering the infiltration route of the paint, even if the coating cap cannot be reliably applied, the range that affects the rolling on the outer peripheral surface of the outer ring of the rolling bearing is painted. It can be prevented or suppressed.

It is a figure which shows a part of external appearance of the motor vehicle provided with the sliding door. It is a figure which shows the combination structure of a center roller unit and a center guide rail. FIG. 5 is a perspective view showing an arrangement configuration of rolling bearings of a center roller unit. It is sectional drawing which shows the combination structure of the rolling bearing and coating cap which concern on this embodiment. It is sectional drawing which shows the case where the combination structure of the rolling bearing and the coating cap shown in FIG. 4 is incomplete. It is sectional drawing which shows the 1st example of the protrusion part provided in a seal member. It is sectional drawing which shows the 2nd example of the protrusion part provided in a seal member. It is sectional drawing which shows the 3rd example of the protrusion part provided in a seal member. It is sectional drawing (state which the coating cap is not correctly adhered) which shows the combination structure of the conventional rolling bearing and the coating cap. It is an enlarged view which shows the location where the coating cap was attached to the outer ring in FIG.

Embodiments of the present invention will be described below with reference to the drawings. In addition, this embodiment is a rolling bearing and a coating cap when a coating cap is attached to a rolling bearing used for a sliding door of an automobile and coating is performed.

FIG. 1 shows the rear part of a vehicle 10 equipped with a sliding door 12. The slide door 12 is arranged so as to be opened and closed by sliding movement with respect to an opening/closing opening 16 formed in a vehicle body 14 of the automobile 10. The slide door 12 is equipped with a center roller unit 18, an upper roller unit 20, and a lower roller unit 22 for smooth sliding movement.

The units 18, 20, 22 move in the front-rear direction along the guide rails 24, 26, 28 provided for the respective units. The center roller unit 18 is provided with a center guide rail 24 on the side surface of the vehicle body 14 behind the opening 16. An upper guide rail 26 is arranged on the vehicle body 14 above the opening 16. A lower guide rail 28 is arranged on the vehicle body 14 below the opening 16. The slide door 12 is guided by these three guide rails 24, 26, 28 and slides open/close in the front-rear direction. At that time, the rolling bearings mounted on the units 18, 20, 22 roll on the guide rails 24, 26, 28.

FIG. 2 is a schematic view showing the center guide rail 24 and the center roller unit 18.

A main arm 30 fixed to the slide door 12 is provided inside the slide door 12 (on the side facing the center guide rail 24 ). A sub arm 34 is connected to the main arm 30 by a fastener 36.

A shaft-shaped first stay 38 protruding toward the vehicle body 14 side is fixed to the sub arm 34 by, for example, press fitting. The sub-arm 34 and the first stay 38 are conductive members made of a metal material such as carbon steel. The sub-arm 34 and the first stay 38 form a first support member 46 that supports a rolling bearing 50 described later.

Further, a pair of second stays 40 (one of which is shown in FIG. 2) protruding upward of the automobile 10 are fixed to the sub-arm 34. The pair of second stays 40 respectively support rolling bearings 52 (only one of which is shown in FIG. 2) as a pair of sub-rollers having a diameter smaller than that of the rolling bearing 50 or a single roller. The sub-arm 34 and the pair of second stays 40 described above are also conductive members made of a metal material such as carbon steel, and form a second support member 48 that supports the pair of sub-rollers 52.

The center guide rail 24 is provided in a recess formed on the left side surface of the vehicle body 14. The center guide rail 24 has a first rail 42 for rolling a rolling bearing 50 as a main roller and a second rail 44 for rolling a pair of sub-rollers 52. The upper surface 42A of the first rail 42 is formed as a rolling surface that guides the rolling bearing 50 of the main roller. The first rail 42 is formed to extend in the front-rear direction of the vehicle 10 so that the first rail 42 can slide while supporting the weight of the slide door 12.

The second rail 44 is formed in a concave shape that opens downwardly of the automobile 10, regulates movement of the slide door 12 in the door thickness direction (left and right direction in FIG. 2), and keeps the slide door 12 and the vehicle body 14 at an appropriate distance. It is configured to slide.

The center guide rail 24 is fixed to the vehicle body 14 by fasteners 54 such as bolts. A cover member 56 that covers a part of the center guide rail 24 is provided at the opening of the recess of the vehicle body 14 in which the center guide rail 24 is housed.

FIG. 3 is a perspective view showing the arrangement of the rolling bearing 50 as the main roller and the sub roller 52. As can be seen from this figure, two sub-rollers 52 are arranged on both sides of the rolling bearing 50 as the main roller. The transfer plane directions of are different by 90 degrees. The rolling bearing 50 as the main roller and the transfer surface direction of the sub roller 52 are different by 90 degrees. Note that the detailed configurations of the first support member 46 and the second support member 48 in FIGS. 3 and 2 are illustrated differently for convenience of illustration.

As can be seen from the above arrangement, the main roller rolling bearing 50 provided in the center roller unit 18 is arranged to roll on the first rail 42 of the center guide rail 24 under the weight of the slide door 12. It is configured. That is, the rolling bearing 50 of the main roller is configured to roll while receiving a load in the radial direction. Therefore, if there is a foreign substance during the rolling, an obstacle occurs during the rolling of the sliding movement, and vibration or the like occurs.

The sub-roller 52 mounted on the center roller unit 18 is not configured to roll under a radial load unlike the rolling bearing 50 of the main roller, and therefore does not have the problem of the main roller.

Although illustration is omitted, the configuration of the lower roller unit 22 arranged with respect to the lower guide rail 28 is basically the same as the configuration of the center roller unit 18 described above. That is, the rolling bearing 50 as the main roller is provided. Therefore, the load of the slide door 12 is received by the rolling bearings 50 of the main rollers of both the center roller unit 18 and the lower roller unit 22.

Although not shown, the configuration of the upper roller unit 20 arranged on the upper guide rail 26 is different from the configurations of the center roller unit 18 and the lower roller unit 22 described above, and the rolling bearing of the main roller. This is a configuration in which 50 is omitted. Other basic configurations are the same.

Each of the units 18, 20, and 22 in the above is assembled on the slide door 12 and is painted on a painting line of an automobile. At the time of this coating, a coating cap 70 is applied to prevent the coating from adhering to the surface of the rolling bearing 50 as the main roller rolling on the rail.

FIG. 4 shows the configuration of the rolling bearing 50 serving as the main roller of the present embodiment in which the coating cap 70 is attached, and shows the state of being coated on the coating line.

First, the detailed configuration of the rolling bearing 50 will be described with reference to FIG. The rolling bearing 50 of the present embodiment is a single row deep groove ball bearing because it is a bearing to which a radial load acts as described above. The rolling bearing 50 includes an outer ring 64, an inner ring 66, and rolling elements 68. The outer ring 64 is arranged at the radially outer position, and the inner ring 66 is arranged at the radially inner position. The rolling element 68 is a ball (sphere) in the present embodiment, is arranged between the outer ring 64 and the inner ring 66, and rolls. The balls 68 are fitted into the ball rolling grooves 64A and 66A formed in the outer ring 64 and the inner ring 66 to roll. In this embodiment, the ball rolling grooves 64A and 66A are formed in a deep groove in a single row arrangement. The balls 68 as rolling elements are held by a retainer 69.

Sealing members 80 are provided as sealing devices at both sides between the outer ring 64 and the inner ring 66. The seal member 80 has a known structure. In the present embodiment, the seal member 80 is fixedly attached to the inner peripheral surface side of the outer ring 64, and the seal lip 86 of the seal member 80 is slidably contacted with the outer peripheral surface of the inner ring 66. It is arranged. This prevents foreign matter such as water from entering the internal space of the rolling bearing 50 (the space where the balls 68 are located). Further, grease for lubrication is sealed inside the rolling bearing 50, and the seal member 80 prevents leakage to the outside. Therefore, the infiltration of the paint is prevented even during the painting.

The seal member 80 includes a cored bar 82 made of metal and a seal forming body 84 made of rubber or resin. The cored bar 82 forms the skeleton of the seal member 80, and the seal forming body 84 is integrally formed on the cored bar 82. The seal lip 86 is formed integrally with the seal forming body 84. Therefore, generally, the seal lip 86 and the seal forming body 84 are made of the same material.

The outer ring 64 of the rolling bearing 50 is usually a steel material such as carbon steel or stainless steel. That is, it is a conductive member capable of electrodeposition coating. Therefore, the outer peripheral surface of the outer ring 64 can be painted. Therefore, when the units 18, 20, and 22 are assembled to the sliding door 12 and coated, the rolling bearing 50 as the main roller is coated with the coating cap 70 as shown in FIG. ..

By the way, as described in the explanation of the problem, in the rolling bearing 50 as the main roller, the adhesion of the paint is a problem in the outer peripheral surface which the outer ring 64 contacts when rolling the guide rails 24 and 28. is there. The outer peripheral surface of the outer ring 64 is formed in an arc shape with a central portion protruding when viewed in a sectional shape in the axial direction. Of these, the surface that functions as a rolling surface is the central area, and the areas on both sides (ranges of about 2 mm from both ends) do not function as rolling surfaces. So there is no problem in rolling. Therefore, the coating cap 70 is attached to prevent the coating material from adhering to the central portion of the outer peripheral surface of the outer ring 64 during coating.

Next, the coating cap 70 shown in FIG. 4 will be described. The coating cap 70 is made of resin and is integrally formed as an annular member having an L-shaped cross section. One piece portion having an L-shaped cross section is an outer peripheral surface portion 72 that covers the outer peripheral surface of the outer ring 64 of the rolling bearing 50. The other side portion of the L-shaped cross section is a side surface portion 74 that covers the seal member 80 on one side of the rolling bearing 50 and the right side seal member 80 in FIG.

The inner surface shape of the outer peripheral surface portion 72 of the coating cap 70 which comes into surface contact with the outer ring 64 is formed as a shape corresponding to the outer peripheral surface shape of the outer ring 64. That is, it is formed as a shape that is in close contact with the outer peripheral surface shape of the outer ring 64. The open end side 72A of the outer peripheral surface portion 72, that is, the left end side in FIG. 4, is formed as an interference fit shape. As a result, even if the outer peripheral surface portion 72 is not completely fitted into the outer ring 64, the open end side 72A of the outer peripheral surface portion 72 is in contact with the outer peripheral surface of the outer ring 64 as shown in FIG. It can be secured.

When the above-mentioned coating cap 70 is adhered to the rolling bearing 50, as shown in FIG. 4, a path R through which the coating material enters during coating is formed. That is, a paint infiltration route R is formed between the side of the rolling bearing 50 on which the seal member 80 is disposed and the side surface portion 74 of the coating cap 70. Therefore, in the present embodiment, the protruding portion 90 is provided in the paint infiltration route R in order to prevent the infiltration of the paint from the paint infiltration route R to the outer peripheral surface of the outer ring 64.

In this embodiment, the protruding portion 90 is provided on the seal member 80. A first example of the protruding portion 90 shown in FIG. 4 is shown as an enlarged view in FIG. As shown in FIG. 6, the protruding portion 90 is provided above the seal member 80. That is, the protruding portion 90 is provided at a position closer to the seal head that fixes the seal member 80 to the outer ring 64 than the position where the seal lip 86 is provided. The protruding portion 90 of the first example is formed in a shape in which the tip is inclined downward as viewed in FIG. That is, the outer diameter of the protruding portion 90 is formed in a shape that decreases toward the outer side in the axial direction. The protruding portion 90 is formed in an annular shape.

FIG. 7 shows a second example of the protruding portion 90, and FIG. 8 shows a third example of the protruding portion 90. The setting position of any of the protruding portions 90 is the upper position as viewed in each drawing, as in the case of the first example. In the case of the second example shown in FIG. 7, the projecting portion 90 has a semicircular cross-sectional shape, and in the case of the third example shown in FIG. 8, it has a triangular cross-sectional shape. The protruding portions 90 of any of the first to third examples are made of an elastic material that forms the seal forming body 84 of the seal member 80, and are integrally formed with the seal forming body 84. Therefore, in the case of the protruding portion 90 of the present embodiment, it is possible to form the protruding portion 90 only by changing the mold of the seal member 80. Therefore, it is possible to deal with the cost increase with almost no increase.

As shown in FIG. 4, the protruding portion 90 integrally formed with the seal member 80 is arranged so as to be in contact with the inner surface of the side surface portion 74 of the coating cap 70. The contact state between the tip of the protruding portion 90 and the inner surface of the side surface portion 74 is arranged as an elastic contact state having a tightening margin. As a result, even when the coating cap 70 is in the incompletely adhered state as shown in FIG. 5, the tip of the protruding portion 90 can maintain the contact state with the inner surface of the side surface portion 74. Therefore, the size of the interference in the contact state is set to a size in which the contact can be established even when the coating cap 70 may be normally incompletely adhered.

Next, a case will be described in which the sliding door 12 having the above-described rolling bearing 50 assembled therein is painted on a painting line of an automobile. First, the coating cap 70 is attached to the rolling bearing 50 prior to coating. With the coating cap 70 attached, the rolling bearing 50 is placed in a coating tank in which the coating liquid for electrodeposition coating is present, and coating is performed on the slide door 12 at the required locations.

When the paint is applied on the paint line, as shown by the arrow in FIG. 4, the paint enters through the paint entrance route R, but the projection portion 90 prevents the paint from entering. That is, the coating material enters through the coating material entering path R formed between the side surface portion 74 of the coating cap 70 and the seal member 80. However, since the protruding portion 90 formed integrally with the seal member 80 is disposed in the paint infiltration route R to block the paint infiltration route R, the paint in the outer peripheral surface direction of the outer ring 64 is prevented from flowing. Intrusion is blocked. Therefore, the outer peripheral surface of the outer ring 64, which is the rolling surface of the rolling bearing 50, is not painted.

Since the open end side 72A of the outer peripheral surface portion 72 of the coating cap 70 is an interference fit with the outer peripheral surface of the outer ring 64 of the rolling bearing 50, the paint does not enter from the open end side 72A. That is, in the present embodiment, the coating of the outer peripheral surface of the outer ring 64 is prevented by coating the outer peripheral surface of the outer ring 64 with the coating cap 70 on one side by the protruding portion 90 and the other on the open end side 72A of the coating cap 70. It is carried out in a hermetically sealed manner by an interference fit.

In this embodiment, the outer peripheral surface of the outer ring is prevented from being coated due to the above-described sealing action. Therefore, as shown in FIG. 5, even if the coating cap 70 is incompletely attached to the rolling bearing 50, the sealing can be maintained and the outer peripheral surface serving as the rolling surface of the outer ring 64 can be maintained. Can be prevented from painting. FIG. 5 shows a case where the coating cap 70 is incompletely fitted into the rolling bearing 50 due to the reasons explained in the above-mentioned problems, and the coating cap 70 is attached in a so-called floating state. Even in such a case, in this embodiment, since the protruding portion 90 is in contact with the side surface portion 74 of the coating cap 70 by elastic contact, the protruding state 90 can be brought into a contact state and can be in a sealed state. Further, since the open end side 72A of the outer peripheral surface portion 72 of the coating cap 70 is also tightly fitted to the outer peripheral surface of the outer ring 64, the sealed state can be maintained.

In the present embodiment, the following effects can be obtained when the projecting portion 90 is arranged as in the first example shown in FIG. First, in the case where the tip end side of the annular protruding portion 90 is inclined inward in the radial direction, when the air in the sealed space inside the coating cap 70 expands, the pressure can easily escape. ..

Next, when the projecting portion 90 is provided at a position closer to the seal head to which the seal member 80 is fixed than the seal lip 86, the amount of air accumulated in the sealed space inside the coating cap 70 is reduced. There is an effect that can be. Further, since the water and the paint adhering to the protruding portion 90 are located away from the position of the seal lip 86 of the seal member 80, they do not flow from the position of the seal lip 86. Furthermore, by providing the projecting portion 90 at a position close to the fixed side of the seal member 80, the projecting portion 90 moves the seal member 80 caused by contact with the side surface portion 74 of the coating cap 70 inward in the axial direction. The influence of trying to deform is reduced.

The present invention has been described above with reference to specific embodiments, but the present invention can be implemented in various other modes.

For example, although the rolling bearing 50 is applied to the sliding door of an automobile in the above-described embodiment, the rolling bearing 50 may be applied to a sliding door of various industrial machines, machine tools, and other structures.

Further, in the above-described embodiment, the protruding portion 90 is provided on the seal member 80, but it may be provided on the coating cap 70. In this case, the tip of the projecting portion 90 elastically contacts the seal member 80 with an interference. With this configuration, the seal member 80 has an advantage that an existing product can be used as it is.

Further, in the above-described embodiment, the protruding portion 90 is provided only on the seal member 80 on one side of the rolling bearing 50. That is, although it is provided only on the side where the side surface portion 74 of the coating cap 70 is provided, it may also be provided on the seal member 80 on the opposite side as shown by the broken line in FIG. In this case, the left and right seal members 80 can be shared, and the directionality of the rolling bearing 50 can be eliminated.

Further, the position where the projecting portion 90 is provided is not limited to the position of the above-described embodiment as long as the paint penetration route R can be closed.

10 Automotive 12 Slide Door 14 Vehicle Body 16 Opening 18 Center Roller Unit 20 Upper Roller Unit 22 Lower Roller Unit 24 Center Guide Rail 26 Upper Guide Rail 28 Lower Guide Rail 30 Main Arm 34 Sub Arm 36 Fastener 38 1st Stay 40 2nd Stay 42 first rail 42A upper surface 44 second rail 46 first support member 48 second support member 50 rolling bearing (main roller)
52 Rolling bearing (sub roller)
54 fasteners 56 cover member 64 outer ring 64A ball rolling groove 66 inner ring 66A ball rolling groove 68 rolling element (ball)
69 Retainer 70 Coating cap 72 Outer peripheral surface portion 72A Open end side 74 Side surface portion 80 Seal member 82 Core metal 84 Seal forming body 86 Seal lip 90 Protruding portion R Paint entry path

Claims (3)

An inner ring, an outer ring, a plurality of rolling elements rotatably provided between the inner ring and the outer ring, and seal members arranged on both sides to define a space in which the rolling element exists from the outside. With a rolling bearing ,
A coating cap formed so as to surround the seal member on the one side from the outer peripheral surface of the outer ring of the rolling bearing,
One of the one side seal member and the painting cap is provided between the one side seal member of the rolling bearing and the painting cap disposed facing the one side seal member. A combination of a rolling bearing and a coating cap, in which an annular projecting portion that protrudes from the other side is formed, and the annular projecting portion elastically contacts the other . A combination of the rolling bearing according to claim 1 and a coating cap ,
A combination of a rolling bearing and a coating cap, wherein the outer diameter of the annular projecting portion has a shape that decreases toward the outer side in the axial direction. A combination of the rolling bearing according to claim 1 or 2 and a coating cap ,
The seal member includes a seal head that is locked to the radially inner surface of the outer ring, and a seal lip that slidably contacts the radially outer surface of the inner ring,
A combination of a rolling bearing and a coating cap, wherein the annular projecting portion is provided closer to the seal head than the seal lip.

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