JP2009085419A - Sealing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing device, constructed by combining a lip seal and an annulus member, prevents a sealed object from leaking from a fit section of the annulus member, and products from adhering each other when a plurality of products are stacked. <P>SOLUTION: The sealing device is provided with a seal lip 19 at the inside of the product as well as a seal lip 16 sliding to an annulus member 21. Furthermore, the seal lip 19 at the inside of the product slidablly and closely contacts the other member (bearing inner ring 62) at a product inner side A more inner side than the annulus member 21, and projects into the product inner side A more inner side than an attaching annulus 12 and the annulus member 21 by making a direction of the lip face toward the outside of the product B, therefore when a plurality of products are stacked, it functions as a spacer to prevent the products from adhering each other caused by a contact between adjacent products. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sealing device, and more particularly to a sealing device comprising a combination of a lip seal member and a ring member. The sealing device of the present invention is used, for example, as a hub bearing seal in an automobile-related field, or used in each related field such as a home appliance, an industrial machine, or a bicycle.

  Conventionally, a sealing device 51 shown in FIG. 10 is known. This sealing device 51 is used as a hub bearing seal in a bearing portion of an automobile wheel suspension device, and is a lip attached to a bearing outer ring 61. The seal member 52 and the ring member 57 mounted on the bearing inner ring 62 are combined.

  The lip seal member 52 is obtained by attaching a rubber-like elastic body 54 to a mounting ring 53 fitted to the inner peripheral surface of the bearing outer ring 61, and a plurality of seal lips 56 are integrated by the rubber-like elastic body 54. It is molded into. On the other hand, the ring member 57 is formed by integrally forming a flange-shaped flat portion 57b at the machine-side end of the cylindrical mounting portion 57a fitted to the outer peripheral surface of the bearing inner ring 62, and the outer periphery of the mounting portion 57a. The seal lip 56 is slidably in close contact with the inner surface of the plane and the flat portion 57b. A magnetic encoder 58 is attached to the end surface of the flange-shaped flat portion 57b.

  However, the above prior art has the following disadvantages.

  That is, in the sealing device 51, the ring member 57, which is a metal ring, is fitted to the bearing inner ring 62, and only the ring member 57 is in contact with the bearing inner ring 62. The rubber-like elastic body 54 and the magnetic encoder 58 are configured not to contact the bearing inner ring 62 at all. Therefore, there is a concern that leakage of a sealing object such as muddy water may occur between the ring member 57 and the bearing inner ring 62 which are fitting portions between metals, and countermeasures are desired.

  Further, since the sealing device 51 is an assembly-type seal, it has a specification in which grease (not shown) is filled inside, and in order to fill the inside with grease, the rubber-like elastic body 54 is built up. Grease may adhere to the tip end surface 55a of the protrusion 55 and the outer end surface (also referred to as encoder surface) 58a of the magnetic encoder 58. As a result, when a plurality of products are stacked and shipped as shown in FIG. 11 at the time of product shipment, the protrusion front end surface 55a of one product (the upper product in the product adjacent in the vertical direction) and the adjacent product (lower The encoder surface 58a of the product on the side) may be pressure-bonded and the products may stick to each other. Since this adhesive further increases in adhesive strength over time, when the user uses the product, it is difficult to separate (separate) the products (cannot be removed). Further, as described above, when the product includes the magnetic encoder 58, the products may be attracted to each other by the magnetic force.

JP 2001-141069 A

  In view of the above points, the present invention can suppress the leakage of the sealing object from the fitting portion of the ring member, and can also prevent the products from sticking to each other when a plurality of products are stacked. An object is to provide a sealing device.

  In order to achieve the above object, a sealing device according to claim 1 of the present invention is a combination of a lip seal member attached to one member of two relatively rotating members and a ring member attached to the other member. The ring member has a cylindrical mounting portion that is fitted to the other member, and a flange-shaped flat portion that is integrally formed at the outer end of the mounting portion. The lip seal member includes a mounting ring fitted to the one member, and a seal lip formed by a rubber-like elastic body attached to the mounting ring and slidably in close contact with the ring member. In addition to the seal lip, the lip seal member has an in-machine seal lip, and the in-machine seal lip is slidable to the other member on the inside of the machine than the ring member. Close to Directing toward the outside of the machine, protruding from the mounting ring and ring member toward the machine inside, and functioning as a spacer that prevents sticking between products by contacting multiple adjacent products when multiple products are stacked It is characterized by being.

  The sealing device according to claim 2 of the present invention is the sealing device according to claim 1, wherein the in-machine seal lip is slid against the peripheral surface of the other member or the axial end surface provided on the other member. It is characterized by close movement.

  According to a third aspect of the present invention, there is provided a sealing device according to the first or second aspect, wherein a magnetic encoder is attached to the outer end surface of the flat surface portion of the ring member, and the inner seal lip includes a plurality of inner sealing lips. It is characterized by contacting with the magnetic encoder in the next product when the product is stacked.

  Furthermore, the sealing device according to claim 4 of the present invention is the sealing device according to claim 1 or 2, wherein the in-machine seal lip is a flat portion of an annular member in an adjacent product when a plurality of products are stacked. It is characterized by contacting with.

  In the sealing device of the present invention having the above-described configuration, the lip seal member is provided with an in-machine seal lip, and this in-machine seal lip is slidably in close contact with the other member on the inside of the apparatus than the ring member, It is said that the lip is directed to the outside of the aircraft. Therefore, if there is an object to be sealed such as muddy water passing through the fitting portion of the ring member, it can be sealed by this in-machine seal lip. At this time, the in-machine seal lip is slidably in close contact with the peripheral surface of the other member, but the other member may be provided with an axial end surface to be in close contact with the end surface. ). When the sealing device of the present invention is used as a hub bearing seal in a bearing portion of an automobile wheel suspension device, the inside of the machine means the inside of the bearing, and the outside of the machine means the outside of the bearing.

  In addition, the machine inner seal lip protrudes more inside the machine than the mounting ring and the ring member, and functions as a spacer that prevents adhesion between products by contacting a neighboring product when a plurality of products are stacked. Has been. Therefore, when the plurality of products are stacked, the in-machine seal lip functions as a spacer, so that other parts of the product do not contact each other. Since the in-machine seal lip itself is easily elastically deformed, it is difficult to adhere even if grease adheres to the surface. Therefore, it is possible to effectively prevent the products from sticking to each other when a plurality of products are stacked.

  The sealing device of the present invention comprises a combination of a lip seal member and a ring member as described above, and this type of sealing device includes a flange-like plane in the ring member as described in the background section above. There are a type in which a magnetic encoder is attached to the outer end face of the machine (type with an encoder) and a type without such a magnetic encoder (type without an encoder). Therefore, in the former type with an encoder, when a plurality of products are stacked, the in-machine seal lip of one product comes into contact with the magnetic encoder in the next product (Claim 3), but in the latter type without an encoder, The in-machine seal lip comes into contact with the flat portion of the ring member in the adjacent product (Claim 4), and in any case, sticking between products is prevented by the spacer function of the in-machine seal lip.

  As described above, according to the sealing device of the present invention, it is possible to effectively suppress leakage of the sealing object from the fitting portion of the ring member by the sealing function of the inner seal lip. The spacer function of the lip can effectively suppress sticking of products when a plurality of products are stacked.

  The present invention includes the following embodiments.

(1) As Embodiment 1 (shape example 1), a lip is further added to the bearing side with respect to the conventional specification, this lip is brought into contact with the mating member (inner ring) side, and the direction of the lip is set to the outside side. It is aimed at. Thereby, the sealing target which leaks from the site | part made to fit can be sealed. In addition, since this lip protrudes beyond the sleeve and the seal width, it overlaps at this part when the seals are stacked, so that not only adhesion and adsorption prevention can be achieved, but also the encoder surface is scratched due to rubber contact. Can be prevented. The shape is the same as that of the present plan as long as it is a specification that can be expected to have the same effect other than the present shape. It can be set arbitrarily in terms of space and built-in.

(2) As Embodiment 2 (shape example 2), the grease lip that has hitherto been applied to the outer peripheral surface of the ring member (sleeve) is brought into contact with the mating member (inner ring) side, and the lip is directed outward. It is characterized by that. Thereby, the sealing target which leaks from the site | part made to fit can be sealed. In addition, since this lip protrudes beyond the sleeve and the seal width, it overlaps at this part when the seals are stacked, so that not only adhesion and adsorption prevention can be achieved, but also the encoder surface is scratched due to rubber contact. Can be prevented. The shape is the same as that of the present plan as long as it is a specification that can be expected to have the same effect other than the present shape. It can be set arbitrarily in terms of space and built-in.

(3) As Embodiment 3 (shape example 3), the structure of the mating member (inner ring) fitted to the seal member (ring member) is changed, and the lip is brought into contact with the changed portion. Thereby, the sealing target which leaks from the site | part made to fit can be sealed. The mating member is extended in the radial direction, and by narrowing the gap between the housing (outer ring) and the seal, a labyrinth effect can be aimed at and an improvement in sealing performance can be expected. In addition, by setting the lip, it overlaps at this portion when the seals are stacked, so that not only adhesion and adsorption can be prevented, but also the scratches on the encoder surface can be prevented due to the rubber contact. In this example, the inner ring side structure is changed, but the same effect can be expected by changing the outer ring side. Therefore, the inner ring and the outer ring are included in the present invention. The shape is the same as that of the present plan as long as it is a specification that can be expected to have the same effect other than the present shape. It can be set arbitrarily in terms of space and built-in.

  Next, embodiments of the present invention will be described with reference to the drawings.

First embodiment ...
FIG. 1 shows a cross section of a main part of a sealing device 1 according to a first embodiment of the present invention. The sealing device 1 according to the embodiment is used as a hub bearing seal in a bearing portion of an automobile wheel suspension device, and is configured as follows. The lower side in the figure is the machine inner side (inside the bearing) A, and the upper side is the machine outer side (outside the bearing) B.

  That is, first, the sealing device 1 includes a combination of a lip seal member 11 mounted on the inner peripheral side of the bearing outer ring 61 and a ring member (also referred to as a slinger or sleeve) 21 mounted on the outer peripheral side of the bearing inner ring 62. It is configured.

  The lip seal member 11 is obtained by attaching (vulcanizing and bonding) a rubber-like elastic body 13 to a metal mounting ring 12 fitted to the inner peripheral surface of the bearing outer ring 61. Thus, a plurality of seal lips, that is, a side lip 16, a first radial lip 17, and a second radial lip (grease lip) 18 are integrally formed together with the outer peripheral seal portion 14 and the end surface covering portion 15. Each of the side lip 16 and the first radial lip 17 seals foreign matter such as muddy water and dust outside the machine so as not to enter the machine. For this reason, the lip end faces the outside B of the machine ( Since the side lip 16 is an end face lip, its lip end is directed radially outward).

  On the other hand, the ring member 21 is a metal ring having a substantially L-shaped cross section as shown in the drawing, and is radially directed to the outer end of the cylindrical mounting portion 21a fitted to the outer peripheral surface of the bearing inner ring 62. A flange-shaped flat portion 21b is integrally formed outward. The side lip 16 is slidably in close contact with the end surface of the plane portion 21b and the first and second radial lips 17 and 18 are slidably in close contact with the outer peripheral surface of the mounting portion 21a. A magnetic encoder 22 is attached to the outer end surface of the plane portion 21b. The magnetic encoder 22 is formed in a ring shape by a rubber-like elastic body mixed with magnetic powder and is formed into a multi-pole in the circumferential direction, and reads a pulse signal by a sensor unit (not shown) during rotation. Is used for detecting the number of rotations and the rotation angle.

  In addition to the above configuration, in the sealing device 1, the lip seal member 11 is provided with an in-machine seal lip 19 as a part of the rubber-like elastic body 13, and the in-machine seal lip 19 is an annular member. It is slidably in close contact with the outer peripheral surface of the bearing inner ring 62 at the machine inner side A than 21, the lip end is directed toward the machine outer side B, and protrudes from the mounting ring 12 and the ring member 21 to the machine inner side A. As shown in FIG. 2, when a plurality of products are stacked on the same axis, the product contacts with the magnetic encoder 22 in the adjacent product, thereby functioning as a spacer that prevents the products from sticking to each other. The base end portion of the seal lip 19 is held by the mounting ring 12.

  The sealing device 1 having the above configuration is used as a hub bearing seal as described above, and seals foreign matter such as muddy water and dust outside the bearing from entering the inside of the bearing. It has a feature in that there are operational effects.

  That is, in the sealing device 1, the machine-side seal lip 19 is provided on the lip seal member 11, and this machine-side seal lip 19 is directly on the outer peripheral surface of the bearing inner ring 62 at the machine inside A rather than the ring member 21. It is slidably in close contact, and the lip end is directed to the outboard side B. Therefore, if there is muddy water or the like passing between the bearing inner ring 62 and the ring member 21 fitted to the bearing inner ring 62, it can be sealed by the in-machine seal lip 19, so that the ring member 21 is fitted. It is possible to effectively suppress leakage of a sealing object such as muddy water from the portion.

  Further, the inner seal lip 19 protrudes further toward the inner side A than the mounting ring 12 and the ring member 21, and comes into contact with the magnetic encoder 22 in the adjacent product when a plurality of products are stacked as shown in FIG. Therefore, it functions as a spacer for preventing sticking between products. Accordingly, when the plurality of products are stacked, the in-machine seal lip 19 functions as a spacer, so other parts of the product do not contact each other, and a predetermined axial gap c is set between the products. The in-machine seal lip 19 itself is a lip and is easily elastically deformed. Therefore, even if grease adheres to its surface, it is difficult to adhere. Therefore, it is possible to effectively prevent the products from sticking to each other when a plurality of products are stacked. Further, since the magnetic force of the magnetic encoder 22 does not reach by setting the gap c, it is possible to prevent the products from adsorbing each other. Further, since the machine-side seal lip 19 made of a rubber-like elastic body comes into contact with the magnetic encoder 22 when the products are stacked, the surface of the magnetic encoder 22 is hardly scratched.

Second embodiment ...
The sealing device 1 according to the first embodiment is a type in which a magnetic encoder 22 is attached to the machine-side end surface of the flange-shaped flat portion 21b of the ring member 21 (a type with an encoder). As shown in FIG. 3, there is a type without a magnetic encoder (a type without an encoder), and the in-machine seal lip 19 having the above-described configuration may be provided in the sealing device 1 without the encoder. In this case, when a plurality of products are stacked, the in-machine seal lip 19 in one product comes into contact with the flat portion 21b of the ring member 21 in the next product, but the same effect as in the first embodiment. (Except for those related to the magnetic encoder 22).

Third embodiment ...
FIG. 4 shows a cross section of the main part of the sealing device 1 according to the third embodiment of the present invention. The sealing device 1 according to the embodiment is used as a hub bearing seal in a bearing portion of an automobile wheel suspension device, and is configured as follows. The lower side in the figure is the machine inner side (inside the bearing) A, and the upper side is the machine outer side (outside the bearing) B.

  That is, first, the sealing device 1 includes a combination of a lip seal member 11 mounted on the inner peripheral side of the bearing outer ring 61 and a ring member (also referred to as a slinger or sleeve) 21 mounted on the outer peripheral side of the bearing inner ring 62. It is configured.

  The lip seal member 11 is obtained by attaching (vulcanizing and bonding) a rubber-like elastic body 13 to a metal mounting ring 12 fitted to the inner peripheral surface of the bearing outer ring 61. Thus, a plurality of seal lips, that is, a side lip 16 and a radial lip 17 are integrally formed together with the outer peripheral seal portion 14 and the end surface covering portion 15. In comparison with the first embodiment, the second radial lip (grease lip) 18 is omitted. Each of the side lip 16 and the first radial lip 17 seals foreign matter such as muddy water and dust outside the machine so as not to enter the machine. For this reason, the lip end faces the outside B of the machine ( Since the side lip 16 is an end face lip, its lip end is directed radially outward).

  On the other hand, the ring member 21 is a metal ring having a substantially L-shaped cross section as shown in the drawing, and is radially directed to the outer end of the cylindrical mounting portion 21a fitted to the outer peripheral surface of the bearing inner ring 62. A flange-shaped flat portion 21b is integrally formed outward. The side lip 16 is slidably in close contact with the inner surface of the plane portion 21b, and the radial lip 17 is slidably in close contact with the outer peripheral surface of the mounting portion 21a. A magnetic encoder 22 is attached to the outer end surface of the plane portion 21b.

  In addition to the above configuration, in the sealing device 1, the lip seal member 11 is provided with an in-machine seal lip 19 as a part of the rubber-like elastic body 13, and the in-machine seal lip 19 is an annular member. It is slidably in close contact with the outer peripheral surface of the bearing inner ring 62 at the machine inner side A than 21, the lip end is directed toward the machine outer side B, and protrudes from the mounting ring 12 and the ring member 21 to the machine inner side A. As shown in FIG. 5, when a plurality of products are stacked on the same axis, the product contacts the magnetic encoder 22 in the adjacent product, thereby functioning as a spacer that prevents the products from sticking to each other. The base end portion of the seal lip 19 is held by the mounting ring 12.

  The sealing device 1 having the above configuration is used as a hub bearing seal as described above, and seals foreign matter such as muddy water and dust outside the bearing from entering the inside of the bearing. It has a feature in that there are operational effects.

  That is, in the sealing device 1, the machine-side seal lip 19 is provided on the lip seal member 11, and this machine-side seal lip 19 is directly on the outer peripheral surface of the bearing inner ring 62 at the machine inside A rather than the ring member 21. It is slidably in close contact, and the lip end is directed to the outboard side B. Therefore, if there is muddy water or the like passing between the bearing inner ring 62 and the ring member 21 fitted to the bearing inner ring 62, it can be sealed by the in-machine seal lip 19, so that the ring member 21 is fitted. It is possible to effectively suppress leakage of a sealing object such as muddy water from the portion.

  Further, the machine-side seal lip 19 protrudes to the machine-side A from the mounting ring 12 and the ring member 21, and comes into contact with the magnetic encoder 22 in the adjacent product when a plurality of products are stacked as shown in FIG. Therefore, it functions as a spacer for preventing sticking between products. Therefore, when the plurality of products are stacked, the in-machine seal lip 19 functions as a spacer, so other parts of the product do not contact each other, and a predetermined axial gap c is set between the products. The in-machine seal lip 19 itself is a lip and is easily elastically deformed. Therefore, even if grease adheres to its surface, it is difficult to adhere. Therefore, it is possible to effectively prevent the products from sticking to each other when a plurality of products are stacked. Further, since the magnetic force of the magnetic encoder 22 does not reach due to the setting of the gap c, it is possible to prevent the products from adsorbing each other. Further, since the machine-side seal lip 19 made of a rubber-like elastic body comes into contact with the magnetic encoder 22 when the products are stacked, the surface of the magnetic encoder 22 is hardly scratched.

  Further, in the sealing device 1 according to this embodiment, since the grease lip 18 in the first embodiment is omitted, the in-machine seal lip 19 also functions as a grease lip.

Fourth embodiment ...
The sealing device 1 of the third embodiment is a type in which a magnetic encoder 22 is attached to the outer end surface of the flange-shaped flat portion 21b of the ring member 21 (a type with an encoder). As shown in FIG. 6, there is a type that does not include a magnetic encoder (a type without an encoder), and the in-machine seal lip 19 having the above-described configuration may be provided in the sealing device 1 without the encoder. In this case, when a plurality of products are stacked, the in-machine seal lip 19 in one product comes into contact with the flat portion 21b of the ring member 21 in the next product, but the same effect as the third embodiment. (Except for those related to the magnetic encoder 22).

Fifth Example ...
FIG. 7 shows a cross section of the main part of the sealing device 1 according to the fifth embodiment of the present invention. The sealing device 1 according to the embodiment is used as a hub bearing seal in a bearing portion of an automobile wheel suspension device, and is configured as follows. The lower side in the figure is the machine inner side (inside the bearing) A, and the upper side is the machine outer side (outside the bearing) B.

  That is, first, the sealing device 1 includes a combination of a lip seal member 11 mounted on the inner peripheral side of the bearing outer ring 61 and a ring member (also referred to as a slinger or sleeve) 21 mounted on the outer peripheral side of the bearing inner ring 62. It is configured.

  The lip seal member 11 is obtained by attaching (vulcanizing and bonding) a rubber-like elastic body 13 to a metal mounting ring 12 fitted to the inner peripheral surface of the bearing outer ring 61. Thus, a plurality of seal lips, that is, a side lip 16, a first radial lip 17, and a second radial lip (grease lip) 18 are integrally formed together with the outer peripheral seal portion 14 and the end surface covering portion 15. Each of the side lip 16 and the first radial lip 17 seals foreign matter such as muddy water and dust outside the machine so as not to enter the machine. For this reason, the lip end faces the outside B of the machine ( Since the side lip 16 is an end face lip, its lip end is directed radially outward).

  On the other hand, the ring member 21 is a metal ring having a substantially L-shaped cross section as shown in the drawing, and is radially directed to the outer end of the cylindrical mounting portion 21a fitted to the outer peripheral surface of the bearing inner ring 62. A flange-shaped flat portion 21b is integrally formed outward. The side lip 16 is slidably in close contact with the end surface of the plane portion 21b and the first and second radial lips 17 and 18 are slidably in close contact with the outer peripheral surface of the mounting portion 21a. A magnetic encoder 22 is attached to the outer end surface of the plane portion 21b.

  In addition to the above configuration, in the sealing device 1, the lip seal member 11 is provided with an in-machine seal lip 19 as a part of the rubber-like elastic body 13, and the in-machine seal lip 19 is an annular member. 21 is closer to the inner side A than 21 and is slidably in close contact with the axial end surface 63a of a flange (also referred to as a protrusion) 63 provided on the outer periphery of the bearing inner ring 62, and the direction of the lip end toward the outer side B. And projecting from the mounting ring 12 and the ring member 21 toward the inner side A, and when a plurality of products are coaxially stacked as shown in FIG. It is supposed to function as a spacer to prevent the adhesion of the material. The base end portion of the seal lip 19 is held by the mounting ring 12. The flange 63 is annular, and the lip end of the seal lip 19 that is in close contact with the end surface 63a of the flange 63 faces inward in the radial direction. The flange 63 is integrally formed with the bearing inner ring 62, but it may be manufactured separately and attached to the bearing inner ring 62.

  The sealing device 1 having the above configuration is used as a hub bearing seal as described above, and seals foreign matter such as muddy water and dust outside the bearing from entering the inside of the bearing. It has a feature in that there are operational effects.

  That is, first, in the sealing device 1, the machine-inside seal lip 19 is provided on the lip seal member 11, and this machine-inside seal lip 19 is arranged on the outer periphery of the bearing inner ring 62 at the machine inside A rather than the ring member 21. It is in close contact with the end face of the provided collar 63 so as to be slidable, and the direction of the lip end is directed toward the outboard side B. Therefore, if there is muddy water or the like passing between the bearing inner ring 62 and the ring member 21 fitted to the bearing inner ring 62, it can be sealed by the in-machine seal lip 19, so that the ring member 21 is fitted. It is possible to effectively suppress leakage of a sealing object such as muddy water from the portion.

  Further, the machine inner side seal lip 19 protrudes to the machine inner side A from the mounting ring 12 and the ring member 21, and comes into contact with the magnetic encoder 22 in the adjacent product when a plurality of products are stacked as shown in FIG. Therefore, it functions as a spacer for preventing sticking between products. Therefore, when the plurality of products are stacked, the in-machine seal lip 19 functions as a spacer, so other parts of the product do not contact each other, and a predetermined axial gap c is set between the products. The in-machine seal lip 19 itself is a lip and is easily elastically deformed. Therefore, even if grease adheres to its surface, it is difficult to adhere. Therefore, it is possible to effectively prevent the products from sticking to each other when a plurality of products are stacked. Further, since the magnetic force of the magnetic encoder 22 does not reach due to the setting of the gap c, it is possible to prevent the products from adsorbing each other. Further, since the machine-side seal lip 19 made of a rubber-like elastic body comes into contact with the magnetic encoder 22 when the products are stacked, the surface of the magnetic encoder 22 is hardly scratched.

Sixth Example ...
The sealing device 1 of the fifth embodiment is a type (a type with an encoder) in which a magnetic encoder 22 is attached to the outer end surface of the flange-shaped flat portion 21b of the ring member 21, but the product specifications are shown in FIG. As shown in FIG. 9, there is a type without a magnetic encoder (a type without an encoder), and the in-machine seal lip 19 having the above-described configuration may be provided in the sealing device 1 without the encoder. In this case, when a plurality of products are stacked, the in-machine seal lip 19 in one product comes into contact with the flat portion 21b of the ring member 21 in the next product, but the same effect as the fifth embodiment. (Except for those related to the magnetic encoder 22).

Moreover, about the said 5th, 6th Example, it can also consider adding and changing the structure further as follows.
(1) As in the third and fourth embodiments, the grease lip 18 is omitted.
(2) In the fifth and sixth embodiments, the axial end surface 63a is set by providing the flange portion 63 on the outer peripheral portion of the bearing inner ring 62, but instead, an annular end surface is formed on the outer peripheral portion of the bearing inner ring 62. A structure in which the end face in the axial direction is set by providing a stepped portion.

Sectional drawing which shows the principal part which shows the mounting state of the sealing device which concerns on 1st Example of this invention. Cross-sectional view of the main part showing a state in which a plurality of the sealing devices are stacked Sectional drawing which shows the principal part which shows the mounting state of the sealing device which concerns on 2nd Example of this invention. Sectional drawing of the principal part which shows the mounting state of the sealing device which concerns on 3rd Example of this invention. Cross-sectional view of the main part showing a state in which a plurality of the sealing devices are stacked Sectional drawing which shows the principal part which shows the mounting state of the sealing device which concerns on 4th Example of this invention. Sectional drawing which shows the principal part which shows the mounting state of the sealing device which concerns on 5th Example of this invention. Cross-sectional view of the main part showing a state in which a plurality of the sealing devices are stacked Sectional drawing which shows the principal part which shows the mounting state of the sealing device which concerns on 6th Example of this invention. Sectional drawing of the principal part showing the mounting state of the sealing device according to the conventional example Cross-sectional view of the main part showing a state in which a plurality of the sealing devices are stacked

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sealing device 11 Lip seal member 12 Mounting ring 13 Rubber-like elastic body 14 Outer periphery seal part 15 End surface covering part 16 Side lip (seal lip)
17,18 Radial lip (seal lip)
19 Machine inner side seal lip 21 Ring member 21a Mounting part 21b Plane part 22 Magnetic encoder 61 Bearing outer ring (one member)
62 Bearing inner ring (other member)
63 Ridge part 63a Axial end face A Machine inside B Machine outside

Claims (4)

A sealing device comprising a combination of a lip seal member mounted on one member of two relatively rotating members and a ring member mounted on the other member,
The ring member has a cylindrical mounting portion that is fitted to the other member, and a flange-shaped flat portion that is integrally formed with an outer end portion of the mounting portion.
The lip seal member has an attachment ring fitted to the one member, and a seal lip formed by a rubber-like elastic body attached to the attachment ring and slidably in close contact with the ring member. In the sealing device,
The lip seal member has an in-machine seal lip in addition to the seal lip,
The inner seal lip is slidably in close contact with the other member on the inner side of the ring member, and the direction of the lip is directed to the outer side, and protrudes to the inner side of the mounting ring and ring member. A sealing device that functions as a spacer that prevents adhesion between products by contacting a neighboring product when a plurality of products are stacked. The sealing device according to claim 1.
An in-machine seal lip is slidably in close contact with a peripheral surface of the other member or an axial end surface provided on the other member. The sealing device according to claim 1 or 2,
A sealing device characterized in that a magnetic encoder is attached to an outer end face of the plane portion of the ring member, and the inner seal lip contacts a magnetic encoder in an adjacent product when a plurality of products are stacked. The sealing device according to claim 1 or 2,
An in-machine seal lip is in contact with a flat portion of an annular member in an adjacent product when a plurality of products are stacked.

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