JP2013241991A - Sealing device of rolling bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing device of a rolling bearing, the device integrated with a magnetized member and allowing a smooth extraction work when the sealing device in a stack is to be extracted by sliding in a horizontal direction.SOLUTION: A sealing device includes a core metal 2, a slinger 3 facing the core metal 2, a sealing member 4 fixed to the core metal 2, and a pulser ring 5 disposed on an outer surface of a slinger disk part 32, in which the sealing member 4 has a projection 45 that radially overlaps the pulser ring 5 in a positional relation, protrudes axially outward from an outer surface of a core metal disk part 22 and is continuously or intermittently formed in a circumferential direction. When the sealing devices 1 are stacked, a top end 21a of a core metal cylindrical part 21 is abutted on the core metal disk part 22 in an upper stage in an axial cross section; and an inclined part 45c formed from the abutting position 22a of the core metal disk part 22 to a top 45b of the projection 45 via a projection start position 45a of the projection 45 shows a gentle inclination at a gentle angle.

Description

  The present invention relates to a rolling bearing sealing device.

  A conventional example is shown in FIG. FIG. 6 is a partial cross-sectional view showing a state in which sealing devices 110 mounted on a rolling bearing that rotatably supports a vehicle wheel with respect to a suspension device are stacked.

  The sealing device 110 is a pack seal with a magnetizing member for detecting rotation, and includes an annular cored bar 120, an annular slinger 130, a seal member 140, and a pulsar ring 150 made of a magnetized member. The sealing device 110 is configured by a cored bar 120 and a slinger 130, both of which have an L-shaped cross section, which are coupled to each other with their cylindrical portions and disk portions facing each other. A sealing member 140 is vulcanized and bonded to the metal core 120, and the sealing member 140 is in sliding contact with the inner surface of the slinger 130 with a margin. A pulsar ring 150 is bonded to the outer surface of the disc portion of the slinger 130. The sealing device 110 is press-fitted into an annular space between the outer ring and the inner ring of the rolling bearing in a coupled state.

  The sealing device 110 is stacked and stored in a packed box for delivery or transportation. As shown in FIG. 6, also in the process of press-fitting into a rolling bearing, the sealing device 110 is stacked and placed on the mounting table 11 and is conveyed one by one by a press-fitting machine handling device. Is done.

  The stacked sealing device 110 prevents the cored bar 120 of the sealing device 110 stacked thereon from being attracted by the magnetic force of the pulsar ring 150. As a preventive measure, the sealing device 110 forms an annular protrusion 141 on the outer side in the axial direction of the seal member 140 to ensure a predetermined interval between the pulsar ring 150 and the cored bar 120. (For example, see Patent Document 1)

JP 2001-141069 A

  However, as shown in FIG. 6, a downward force F is applied to each of the stacked sealing devices 110 due to the weight of the sealing devices 110 stacked on the upper stage. When a downward force F is applied to each sealing device 110, the slinger 130 is pushed downward and moved downward until the core metal 120 of the upper sealing device 110 abuts the axial tip 121 of the metal core 120. As a result, the protrusion 141 enters inside from the axial end of the lower cored bar 120.

  When the sealing device 110 is taken out of the box and transported by the handling device of the press-fitting machine, the uppermost sealing device 110 of the stacked sealing devices 110 is slid in the horizontal direction and extracted. When the uppermost sealing device 110 is slid in the horizontal direction, the protrusion 141 of the uppermost sealing device 110 is caught on the tip 121 of the core metal 120 of the lower sealing device 110. Therefore, the sealing device 110 cannot perform a smooth extraction operation, and the cored bar 120 and the slinger 130 may be separated. In view of this, the rolling bearing sealing device in which the magnetized members are integrated has a problem that when the stacked sealing devices are slid in the horizontal direction and extracted, the extraction operation can be performed smoothly.

  The present invention has been made to solve such a problem, and in a sealing device in which magnetized members are integrated, when the stacked sealing devices are slid horizontally and extracted, the extraction operation is smoothly performed. An object of the present invention is to provide a sealing device for a rolling bearing that can be carried out.

  In order to solve the above-mentioned problem, a structural feature of the rolling bearing sealing device according to claim 1 is that a cored bar cylindrical portion fitted to the inner peripheral surface of the outer ring that is a stationary raceway and the cored bar cylinder On the outer peripheral surface of the inner ring, which is a rotation side raceway ring, facing the cored bar cylindrical part, and a cored bar made of a cored bar disk part extending radially inward from the end of the part A slinger formed of a slinger cylindrical portion to be fitted and a slinger disc portion extending radially outward from an end of the slinger cylindrical portion and formed in an L-shaped cross section, and an elastic body integrally with the cored bar In a sealing device for a rolling bearing, comprising: an annular seal member fixedly attached in sliding contact with the slinger; and an annular magnetized member provided on an outer surface of the slinger disc portion, wherein the seal member is the magnetized member In the radial direction, the cored bar disk The cored bar cylindrical portion in the axial cross section when the sealing devices are stacked, having a protruding portion that protrudes outward in the axial direction from the outer surface of the sealing member and is continuous or intermittent in the circumferential direction. A slanted portion that is formed from the contact position of the core metal disc portion to the top of the projection portion through the projection start position of the projection portion. It is inclined at an angle.

  According to the rolling bearing sealing device of claim 1, when the stacked sealing devices are pulled out by sliding in the horizontal direction, the inclined portion that contacts the tip of the lower core metal cylindrical portion is inclined at a gentle angle. As a result, the catch becomes small and the projection can be smoothly moved over, and the extraction operation can be performed smoothly.

  ADVANTAGE OF THE INVENTION According to this invention, in the sealing device which integrated the magnetizing member, when sliding the stacked sealing device to a horizontal direction and extracting it, the sealing device of a rolling bearing which can perform extraction work smoothly can be provided.

It is sectional drawing of the sealing device which is one Embodiment of this invention. It is a fragmentary sectional view which shows the use condition of the sealing device of FIG. It is sectional drawing which shows the stacking state of the sealing device of FIG. It is a fragmentary sectional view which shows the modification of FIG. It is a fragmentary sectional view which shows the modification of FIG. It is sectional drawing which shows the stacked state of the sealing device of a prior art example.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment in which a rolling bearing sealing device of the invention is embodied will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a sealing device 1 according to an embodiment of the present invention.

  The sealing device 1 is a pack seal with a magnetizing member for detecting rotation, and includes a core metal 2, a slinger 3, a seal member 4, and a pulsar ring 5 (magnetizing member).

  The cored bar 2 includes a cylindrical cored bar cylindrical part 21 and a cored bar disk part 22 extending radially inward from the end of the cored bar cylindrical part 21, and has a L-shaped cross section. As a material of the cored bar 2, for example, SPCC of a cold-rolled steel sheet that is a rust-proofing treatment that is a magnetic material is used.

  The slinger 3 includes a cylindrical slinger cylindrical portion 31 and a slinger disc portion 32 extending radially outward from an end portion of the slinger cylindrical portion 31 and has an L-shaped cross section. The slinger 3 is preferably formed of a magnetic material so that the magnetic field strength of the pulsar ring 5 is increased and rotation can be easily detected. As the magnetic material, for example, ferritic stainless steel (JIS standard SUS430, etc.) is used.

  The core metal 2 and the slinger 3 are configured by combining the core metal cylindrical portion 21 and the slinger cylindrical portion 31 with the core metal disc portion 22 and the slinger disc portion 32 facing each other, and a configuration called a pack seal is obtained. ing.

  An annular seal member 4 made of an elastic body is vulcanized and integrated with the core metal 2. The seal member 4 includes a fitting part 41, a cylindrical part 42, a base part 43, a lip part 44, and a protruding part 45. The fitting part 41 is formed at the end of the cored bar cylindrical part 21. The cylindrical part 42 extends from the fitting part 41 along the inner peripheral surface of the cored bar cylindrical part 21. The base portion 43 extends radially inward from the cylindrical portion 42 along the core metal disc portion 22. The lip portion 44 extends from the base portion 43 and has an axial lip 44a that slides in contact with the inner surface of the slinger disc portion 32 with a tightening margin, and two radial lips 44b that slide in contact with the outer peripheral surface of the slinger cylindrical portion 31 with a tightening margin. 44c, and is in sliding contact with the entire circumference of the slinger 3.

  The protrusion 45 extends from the base 43 toward the outer diameter side along the outer surface of the cored bar part 22 and protrudes outward in the axial direction. The projecting portion 45 is formed in a mountain shape in cross section, has a positional relationship overlapping with a pulsar ring 5 described later in the radial direction, and projects in an annular shape continuously in the circumferential direction.

  The pulsar ring 5 is provided on the outer surface of the slinger disc portion 32 of the slinger 3 as a magnetized member. The magnetic powder is mixed with rubber and vulcanized, and the N and S poles are alternately arranged in the circumferential direction. Are bonded to the outer surface of the slinger disc portion 32.

  FIG. 2 is a partial cross-sectional view showing a use state of the sealing device 1 of FIG. The sealing device 1 is attached to an end portion in the axial direction of a wheel rolling bearing for inner ring rotation, and seals the inside of the rolling bearing.

  This rolling bearing includes an outer ring 6 fixed to a vehicle body (not shown), an inner ring 7 in which an axle (not shown) is fitted, and a plurality of balls 8 interposed between the outer ring 6 and the inner ring 7. An angular contact ball bearing for rotating the inner ring. The metal core 2 of the sealing device 1 is press-fitted and fixed to the inner peripheral surface of the outer ring 6 of the rolling bearing, and the slinger 3 is press-fitted and fixed to the outer peripheral surface of the inner ring 7. The magnetic sensor 9 which comprises a rotation detection apparatus with the pulsar ring 5 arrange | positioned at the axial direction outer surface of a rolling bearing is opposingly arranged.

  In such a rolling bearing, when the pulsar ring 5 rotates together with the inner ring 7, the N pole and the S pole alternately pass in the vicinity of the detection surface of the magnetic sensor 9, and the direction of the magnetic flux flowing in the magnetic sensor 9 changes. Due to the change of the magnetic flux, the signal of the magnetic detection element such as the Hall element incorporated in the magnetic sensor 9 changes. The frequency at which this signal changes is proportional to the rotational speed of the axle, and the signal is transmitted to the controller to detect the rotational speed and to control the antilock brake system (ABS) and the like.

  3 is a cross-sectional view showing a stacked state of the sealing device 1 of FIG. As shown in FIG. 3, when the sealing device 1 is stacked in a plurality of stages on the mounting table 11 in the process of press-fitting into the rolling bearing, each of the stacked sealing devices 1 is stacked on the upper stage. A downward force F is applied depending on the weight of. When a downward force F is applied to each sealing device 1, the slinger 3 is moved until the axial tip 21 a of the core metal cylindrical portion 21 covered by the fitting portion 41 comes into contact with the core metal 2 of the upper sealing device 1. It is pushed downward and moves downward. As a result, the protrusion 45 enters the inner side from the axial end of the lower cored bar 2. Here, in the sealing device 1, the protrusion 45 is formed so as to overlap the pulsar ring 5 in the radial direction, so that the protrusion 45 is between the pulsar ring 5 and the core metal 2 of the sealing device 1 stacked on the upper stage. These adsorptions are prevented by intervening and securing a predetermined interval.

  In this state, the tip 21a of the cored bar cylindrical part 21 abuts on the abutting position 22a of the end part on the radially outer diameter side of the upper cored bar part 22. The protrusion 45 is a gentle angle, for example, a line orthogonal to the axis, from the protrusion start position 45a that is slightly inward in the radial direction from the contact position 22a of the cored bar part 22 and starts a protrusion having a cross-sectional mountain shape. Is formed at an angle of about 20 degrees to the top 45b of the protrusion.

  Accordingly, in the sealing device 1, when the stacked sealing devices 1 are slid and pulled out in the horizontal direction, the inclined portion 45c that contacts the tip 21a of the lower core metal cylindrical portion 21 protrudes from the contact position 22a. After the start position 45a, it reaches the top 45b. Since the inclined portion 45c is formed to be inclined at a gentle angle, the component force in the radial direction of the load received when the inclined portion 45c contacts the tip 21a is greatly reduced. As a result, in the sealing device 1, the cored bar 2 can smoothly get over the protrusion 45, and the extraction operation can be performed smoothly.

  As described above, according to the rolling bearing sealing device 1 according to the present embodiment, in the sealing device 1 in which the pulsar ring 5 is integrated, when the stacked sealing devices 1 are slid in the horizontal direction and extracted, the extraction operation is performed. Can be performed smoothly.

In the above-described embodiment, the inclined portion 45c is formed from the contact position 22a to the top 45b via the protrusion start position 45a. However, the present invention is not limited to this. For example, as shown in FIG. You may apply to the structure in which the easy inclination part 450c is formed. This will be specifically described below.
FIG. 4 is a partial cross-sectional view showing a modification of FIG. In the sealing device 10 shown in FIG. 4, the protrusion 450 has a contact position 22a and a protrusion start position 450a of the protrusion at the same position, and a gentle angle therefrom, for example, an angle with respect to a line orthogonal to the axis is about 15 degrees. Inclined and formed up to the top 450b of the protrusion. That is, the inclined portion 450c extends from the protrusion start position 450a to the top 450b.
Thus, even if the position where the tip 21a of the cored bar cylindrical portion 21 abuts on the upper sealing device 10 is the projection start position 450a, the sealing device 10 allows the cored bar 2 to smoothly get over the projection 450. And the extraction work can be performed smoothly.
Here, although the inclination angle of the inclined portion depends on the height of the protruding portion, the angle with respect to a line orthogonal to the axis is preferably about 30 degrees or less.

Moreover, in the said embodiment, although the front-end | tip 21a of the cored bar cylindrical part 21 was set as the structure which the edge part orthogonally crossed to the axis line, it is not restricted to it, For example, as shown in FIG. You may apply to the structure currently made. This will be specifically described below.
FIG. 5 is a partial sectional view showing a modification of FIG. In the sealing device 11 shown in FIG. 5, the axial end 210 a of the cored bar cylindrical part 210 of the cored bar 20 covered with the fitting part 401 of the seal member 400 is chamfered on the inner peripheral side of the edge part.
As a result, the sealing device 10 can smoothly move the cored bar 20 over the protrusion 402 and can smoothly perform the extraction operation.

  Moreover, in the said embodiment, although it was set as the structure which the protrusion parts 45,402,450 protruded cyclically | annularly continuously in the circumferential direction, it is not restricted to it, For example, it protrudes cyclically | annularly. You may apply to a structure.

DESCRIPTION OF SYMBOLS 1,10: Sealing device, 2,20: Core metal, 21,210: Core metal cylinder part, 21a, 210a: The tip of a metal core cylinder part, 22,220: Core metal disk part, 22a: Core metal disk 3: Slinger, 31: Slinger cylindrical part, 32: Slinger disc part, 4, 40, 400: Seal member, 41, 401: Fitting part, 42: Cylindrical part, 43: Base part, 44 : Lip, 44a: Axial lip, 44b, 44c: Radial lip, 45, 402, 450: Projection, 45a, 450a: Projection start position, 45b, 450b: Top, 45c, 450c: Slope, 5: Pulsar ring Magnetic member), 6: outer ring, 7: inner ring

Claims (1)

A cored bar cylindrical part fitted on the inner peripheral surface of the outer ring which is a fixed side raceway ring and a cored bar disk part extending radially inward from the end of the cored bar cylindrical part are formed in an L-shaped cross section. A slinger cylinder that is fitted to the outer peripheral surface of the inner ring that is the rotating raceway, and a slinger disc that extends radially outward from the end of the slinger cylinder. A slinger having an L-shaped cross section, an annular sealing member that is integrally fixed to the core bar and is in sliding contact with the slinger, and an annular provided on the outer surface of the slinger disc In a sealing device for a rolling bearing comprising:
The seal member has a positional relationship overlapping with the magnetized member in the radial direction, and protrudes outward in the axial direction from the outer surface of the cored bar part, and is formed continuously or intermittently in the circumferential direction. Having a protrusion
When the sealing devices are stacked, in a cross section in the axial direction, the tip of the cored bar cylindrical part abuts on the cored bar disk part in the upper stage, and the protrusion of the projection part from the abutting position of the cored bar disk part A rolling bearing sealing device, wherein an inclined portion formed from a protrusion start position to the top of the protrusion is inclined at a gentle angle.

Images