JP2004060701A - Crown cage for ball bearing and ball bearing incorporating the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crown cage whose displacement can be suppressed in both radial and axial directions without causing deterioration of a lubricating condition between a ball and a raceway groove of each of inner and outer rings and possible wear and seizure, and a ball bearing using the same. <P>SOLUTION: The crown cage having a plurality of pockets whose inner faces partially open comprises means A for suppressing the displacement of the cage in the radial direction and means B for suppressing the displacement of the cage in the axial direction, each of which is applied to at least one pocket. The means for the suppressing the displacement of the cage in the radial direction is protrusions 7b formed on one or both of an inner diameter side edge portion and an outer diameter side edge portion of the pocket 6 in opposition to an axial line segment of the pocket. The means for suppressing the displacement of the cage in the axial direction is formed as a pocket surface consisting of single or two or more curved faces where an axial gap La of the pocket 6 is set smaller than a circumferential gap Lr. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a crown-type cage for holding a plurality of balls equally and rolling freely between inner and outer rings, and a ball bearing using the cage.
[0002]
[Prior art]
BACKGROUND ART Rolling bearings, particularly deep groove ball bearings using balls as rolling elements (hereinafter, also referred to as ball bearings), have been widely used as mechanical elements for rotating and supporting a rotating body.
The balls of the ball bearings are arranged equally between the inner and outer raceway grooves by cages, and there are various types of cages from steel to resin.
In particular, a crown-type cage using a plastic (thermoplastic resin) as shown in FIG. 2 has a greater degree of freedom in shape design, lower cost, and lower torque (low friction and low wear) than a steel cage. ), There are advantages such as light weight, etc.
In recent years, the demand for quietness of these ball bearings has become more severe each day.
33 and 34, these retainers 100 have pockets 104 for disposing and holding a plurality of balls 102 at equal intervals between the inner and outer raceway grooves. The pocket diameter D1 is slightly larger than the ball diameter D2. It is designed to have a diameter, and a gap (pocket gap) Ps or Ms2 exists between the ball 102 and the inner surface of the pocket 104.
Therefore, when the ball bearing is rotating or stationary, the cage 100 can freely move by the pocket gap Ps or Ms2 (cage movement amount).
In particular, as shown in FIG. 35, the retainer 100 moves in the radial direction S2 or the axial direction S1, but if the amount of movement of the retainer 100 is large, abnormal noise called retainer sound may occur during the rotation of the bearing. This is particularly likely to occur when grease is sealed in the ball bearing (110 in the figure, inner ring; 112, outer ring). Therefore, the present applicant has previously filed an application for a crown-type cage provided with a means for suppressing the amount of movement of the cage (Japanese Patent Application Laid-Open No. 9-158951 and Japanese Patent Application Laid-Open No. 2000-337387).
In Japanese Patent Application Laid-Open No. Hei 9-158951, as shown in FIG. 36, in the crown-shaped retainer 100 including a plurality of pockets 104 each having an opening on one side, the pockets 104 Are formed in a straight hole having a peripheral wall along the inner surface, and at one or both of the inner diameter edge 105 and the outer diameter edge 106 of the hole, a projection holding the rolling element 102 on the respective edge side. 107 are formed so as to face each other in the axial direction of the straight hole. "A crown type cage for a rolling bearing is provided.
According to the cage of the present invention, it is possible to control the amount of radial movement of the cage.
On the other hand, in Japanese Patent Application Laid-Open No. 2000-337387, as shown in FIG. 37, "a whole is formed in an annular shape, and pockets 104 for accommodating and holding the rolling elements 102 are formed at a plurality of positions in the circumferential direction on the pocket surface. In a cage for a rolling bearing, in which an opening 108 having an opening width smaller than the diameter of the rolling element 102 is provided on one side of the pocket 104 in the axial direction, the rolling surface of the rolling element 102 and the pocket surface in the axial direction are provided. The relationship between the axial gap δ provided therebetween and the rotation diameter Da of the rolling element 102 is set in the range of δ / Da = −0.01 to 0.02, and the pocket surface is A pair of first pocket surfaces 109, 109 provided on the inner side, and a second pocket surface 110 provided between the first pocket surfaces 109, 109; The center of the radius of curvature Ra of the cutting surface 109 with respect to the center of the radius of curvature R of the second pocket surface 110 substantially coinciding with the center of rotation of the rolling element 102 in the axial direction or the circumferential direction. A hage-localized rolling bearing cage is provided.
According to the cage of the present invention, it is possible to control the amount of axial movement of the cage.
[0003]
[Problems to be solved by the invention]
According to each of the prior arts described above, it is possible to suppress the movement of the retainer in the radial direction or the axial direction as described above, and effectively suppress each retainer sound generated by the movement of the retainer.
However, there are two types of cage sound, as described above, in which the cage is moved in the radial direction, and in which the cage is moved in the axial direction. , Generation conditions (speed, load, temperature, grease, etc.) are different.
Ball bearings are widely used in various applications such as automobile parts, home appliances, information equipment, and precision equipment because of their good balance of torque, quietness, rotational accuracy, load-bearing capacity, and handleability. Furthermore, the operating conditions (load, rotation speed, temperature, grease, etc.) of the ball bearings incorporated in these products are wide-ranging. For example, they are used outdoors such as ball bearings mounted on automobiles and outdoor units of air conditioners. In such a case, operation in a wide temperature range (for example, about -40 ° to 120 °) is required. Further, from the viewpoint of the efficiency of the device, the change in the number of rotations may be controlled in a wide range.
Therefore, a ball bearing incorporated in a certain device generates a cage noise generated when the cage moves in a radial direction under a certain operating condition, and also generates a cage noise in an axial direction under a certain operating condition. Movement may cause a retainer sound.
That is, the above-described conventional technique is effective in suppressing any of the retainer sounds, but may be difficult in a situation in which both of them are suppressed. .
It is theoretically possible to suppress the radial and axial movements of the cage by setting the clearance between the ball holding the ball and the ball to “substantially zero”. However, it is difficult to put the pockets to practical use because they may scrape lubricant such as grease, degrade the lubrication state between the balls and the inner and outer raceway grooves, and cause wear and seizure.
The present invention has been made in view of such problems of the prior art, and does not deteriorate the lubrication state between the balls and the inner and outer raceway grooves, does not cause wear or seizure, and reduces It is an object of the present invention to provide a crown-shaped cage capable of suppressing both the amount of movement in the radial direction and the amount of movement in the axial direction, and a ball bearing using the cage.
[0004]
[Means for Solving the Problems]
Technical means achieved by the present invention to achieve the above object is a crown type retainer having a plurality of pockets and a part of the inner surface of the pocket being open, and holding the pocket in at least one or more pockets. A ball bearing crown type retainer provided with a vessel radial direction movement amount suppressing means and a retainer axial direction movement amount suppressing means. In this case, the retainer radial movement amount suppressing means is provided on one or both of the inner diameter side edge portion and the outer diameter side edge portion of the pocket so as to be opposed to the axial line segment of the pocket. The retainer axial movement amount suppressing means has a pocket surface having a single or a plurality of curved surfaces in which an axial gap of the pocket is set smaller than a circumferential gap.
Further, a crown-shaped retainer having a plurality of pockets and a part of the inner surface of the pocket being open, wherein at least the plurality of pockets is provided with retainer radial movement amount suppressing means, and at least one of the pockets other than the pocket is provided. It is also possible to provide a crown type cage for a ball bearing in which a plurality of pockets are provided with retainer axial movement amount suppressing means. In this case, the retainer radial movement amount suppressing means is provided on one or both of the inner diameter side edge portion and the outer diameter side edge portion of the plurality of pockets so as to be opposed to the axial line segment of the pocket. The retainer axial movement amount suppressing means has an axial gap between at least a plurality of pockets other than the pocket, and a single or a plurality of curved surfaces set to be smaller than the circumferential gap. A pocket surface.
In configuring a ball bearing, any of the above-described ball bearing crown retainers is used.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the rolling bearing of the present invention will be described with reference to the drawings.
Note that the present embodiment is merely an embodiment of the present invention, and is not to be construed as being limited to the embodiment. The design can be appropriately changed within the scope of the present invention.
[0006]
FIG. 1 shows an embodiment of the rolling bearing of the present invention using the cage of the present invention.
The rolling bearing includes a pair of bearing races including an outer ring 1 and an inner ring 2, a plurality of rolling elements (balls) 3 incorporated between the outer ring 1 and the inner ring 2 via a crown type retainer 4, and an outer ring 1. And a sealing plate (contact or non-contact seal or shield) 5 provided between the inner ring 2 as necessary and sealing the inside of the bearing.
Further, in the present embodiment, the configuration other than the crown type retainer 4, for example, the outer ring 1, the inner ring 2, and the sealing plate 5 can be arbitrarily changed in design without being limited to the illustrated form. 3) Assume that a desired number of the same size (same diameter) are incorporated. Grease and lubricating oil are put in the bearing as needed.
Since the present invention has a characteristic configuration of the crown type cage 4 in the above bearing configuration, the following description will focus on the description of the crown type cage.
[0007]
For example, as shown in FIG. 2 as a typical example, the crown-shaped retainer 4 has an annular holding shape in which a plurality of pockets 6 each having a desired diameter and a part of which is open in the inner surface of the pocket are provided at equal intervals in the circumferential direction. It is a vessel.
In the present invention, a technical means A for suppressing the amount of radial movement of the cage and a technical means B for suppressing the amount of axial movement described below are provided in the pocket 6 of this type of crown type cage 4. Specific technical means consisting of:
[0008]
Next, an embodiment of the technical means A for suppressing the amount of radial movement of the retainer and an embodiment of the technical means B for suppressing the amount of axial movement will be described separately. The positions of the pockets of the retainer provided with are described with reference to the drawings.
[0009]
"Technical means A for suppressing the amount of movement of the cage in the radial direction"
3 to 8 show an example of the means A for suppressing the amount of movement of the crown type cage 4 in the radial direction.
[0010]
3 to 5 show that the pocket 6 is provided on one or both of the inner diameter side edge portion 6a and the outer diameter side edge portion 6b so as to be opposed to the axial line segment of the pocket 6 of the retainer 4, and the projections 7, 7 is an example of an embodiment in which 7 is formed.
FIG. 3 shows an embodiment in which the pockets 6 are formed on the inner diameter side edge portion 6a so as to face the axial line of the pockets 6 of the retainer 4 so as to form projections 7,7.
FIG. 4 shows an embodiment in which projections 7, 7 are formed at the pocket outer diameter side edge portion 6b so as to face the axial line segment of the pocket 6 of the retainer 4.
FIG. 5 shows an embodiment in which the projections 7, 7 are formed on both the inner diameter side edge portion 6a and the outer diameter side edge portion 6b of the pocket 4 of the retainer 4 so as to face each other with respect to the axial line segment. .
3 to 5, the edge of the projection 7 contacts the ball 3 to suppress the amount of movement of the retainer 4 in the radial direction, and the lubricant adheres and accumulates on the other pocket surfaces. When it is applied to the ball surface, it contributes to lubrication between the ball 3 and the outer and inner raceway grooves.
3 to 5 are merely an embodiment of the technical means A for suppressing the amount of movement of the cage in the radial direction. Any form can be used as long as it can be suppressed, and the design can be appropriately changed within the scope of the present invention.
[0011]
6 to 8 show that the pocket 6 is provided on one or both of the inner diameter side edge portion 6a and the outer diameter side edge portion 6b so as to be opposed to the axial line segment of the pocket 6 of the retainer 4. , 7 are formed.
FIG. 6 shows a form in which the projections 7, 7 are opposed to the axial line segment of the pocket 6 and each have a continuous shape.
FIG. 7 shows a form in which the projections 7, 7 are each divided into a plurality of parts facing each other in the axial direction of the pocket 6.
FIG. 8 is an improved type of FIG. 7, in which the projections 7, 7 are formed in a semicircular shape when viewed from the inner diameter side or the outer diameter side of the cage.
6 to 8, the edge of the projection 7 contacts the ball 3 to suppress the amount of movement of the retainer 4 in the radial direction, and the lubricant adheres and accumulates on the other pocket surfaces. When it is applied to the ball surface, it contributes to lubrication between the ball 3 and the outer and inner raceway grooves.
6 to 8 are merely an embodiment of the technical means A for suppressing the amount of movement of the cage in the radial direction, and the size and shape of the projections 7 indicate the amount of movement of the cage in the radial direction. Any form can be used as long as it can be suppressed, and the design can be appropriately changed within the scope of the present invention.
[0012]
FIG. 9 is another example of the technical means A for suppressing the amount of movement of the cage in the radial direction, which means that the PCD (pitch circle diameter) of the pocket 6 is unevenly distributed with respect to the PCD of the ball 3. The center of the pocket 6 is unevenly distributed with respect to the center of the ball 3 when the ball 3 is incorporated between the outer and inner rings 1 and 2.
In FIG. 9, the center of the pocket 6 is taken radially outward with respect to the center of the ball 3, but may be reversed (the center of the pocket 6 is radially inside with respect to the center of the ball 3). In FIG. 9, the inner diameter side edge 6 a or the outer diameter side edge 6 b of the pocket 6 comes into contact with the ball 3, and a clearance between the ball 3 and the pocket 6 exists in a region reaching the edge in the opposite direction, respectively. The lubricant is deposited and deposited, and is applied to the ball surface, thereby contributing to the lubrication between the ball 3 and the outer and inner raceway grooves.
[0013]
"Means B for suppressing the amount of axial movement of the cage"
11 to 17 show an example of the means B for suppressing the amount of axial movement of the retainer 4, and as shown in FIG. 10, the axial gap La of the pocket 6 is larger than the circumferential gap Lr. Is an example in which the pocket surface 6c is configured to have a small or single curved surface.
FIG. 11 shows that the pocket surface 6c is composed of composite surfaces 6d, 6d and 6e composed of two radii of curvature and a center of curvature.
In FIG. 12, the pocket surface 6c is composed of a composite surface 6d, 6d, and 6f composed of a curved surface 6d having one radius of curvature and a center of curvature, and a flat surface 6f.
In FIG. 13, the pocket surface 6c is composed of composite surfaces (ellipses) 6d, 6d and 6g each having two radii of curvature and one center of curvature.
FIG. 14 shows a composite surface in which the pocket bottom surface 6h is provided with one projection 6i protruding toward the retainer opening side.
FIG. 15 shows a composite surface in which the pocket bottom surface 6h is provided with two projections 6i projecting toward the cage opening side.
FIG. 16 shows a composite surface in which two projections 6i projecting toward the pocket bottom surface 6h are provided on the pocket opening side surface 6j.
FIG. 17 shows a form in which a line segment passing through the center (single curved surface) of each pocket 6 is unevenly distributed in the axial direction with respect to a line segment passing through the center of the ball 3.
3 to 9, the pocket 6 in the form shown in FIGS. 11 to 17 has a gap between the ball 3 and the pocket 6, and a lubricant is deposited and deposited on the surface of the ball. The application contributes to lubrication between the balls 3 and the outer and inner raceway grooves.
11 to 17 are merely an embodiment of the means B for suppressing the amount of axial movement of the cage, and are not limited in any way. Any design is possible, and the design can be changed as appropriate within the scope of the present invention.
[0014]
Therefore, by adapting the form (means) shown in FIGS. 3 to 17 described above to the pocket positions shown in FIGS. 18 to 32 described below, the radial movement amount and the axial movement amount of the retainer can be reduced. Both can be suppressed.
Combinations of these means are not limited to the following embodiments, but can be freely changed within the scope of the present invention and can be appropriately changed in design.
[0015]
“Example of pocket position adaptation of retainer radial movement amount suppression means A and axial movement amount suppression means B”
FIG. 18 shows that, in the crown type cage 4 having six pockets, the means A for suppressing the amount of radial movement of the cage and the means B for suppressing the amount of axial movement are provided in each of the three pockets 6. It shows the positional relationship of the set form (that is, each of the three pockets 6 has an A + B configuration).
In the present embodiment, these three pockets 6 are located at equal intervals of 120 °. The other pockets 6 "are formed in pockets of a known shape, and preferably, the radial gap and the axial gap with the ball are set larger, so that the pocket restrains the ball or the ball rotates the pocket. Set to not drive.
The means A for suppressing the amount of movement of the retainer in the radial direction and the means B for suppressing the amount of movement in the axial direction are arbitrarily selected from the above-described embodiments and applied.
FIG. 19 shows that in the crown type cage 4 having seven pockets, means A for suppressing the amount of radial movement of the cage and means B for suppressing the amount of axial movement are provided in each of the three pockets 6. It shows the positional relationship of the set form (that is, each of the three pockets 6 has an A + B configuration).
In the present embodiment, since the total number of pockets is seven, these three pockets 6 are not located at equal positions at 120 °. Therefore, the position is set to be as even as possible 120 °. The other pockets 6 "are formed in pockets of a known shape, and preferably, the radial gap and the axial gap with the ball are set to be larger, and the pocket 6" restrains the ball, or the ball is 6 "is set so as not to be driven to rotate.
FIG. 20 shows that in the crown type cage 4 having eight pockets, means A for suppressing the amount of radial movement of the cage and means B for suppressing the amount of axial movement are provided in each of the three pockets 6. It shows the positional relationship of the set form (that is, each of the three pockets 6 has an A + B configuration).
In the present embodiment, since the total number of pockets is eight, these three pockets 6 are not located at equal positions at 120 °. Therefore, the position is set to be as even as possible 120 °. The other pockets 6 "are formed in pockets of a known shape, and preferably, the radial gap and the axial gap with the ball are set to be larger, and the pocket 6" restrains the ball, or the ball is 6 "is set so as not to be driven to rotate.
[0016]
FIG. 21 shows a crown type retainer 4 having six pockets, in which three pockets 6 are provided with means A for suppressing the amount of movement of the retainer in the radial direction, and the other three pockets 6 'are provided with: It shows a positional relationship in a mode in which means B for suppressing the amount of axial movement is set.
The pockets shown in FIG. 21 are provided with different restraining means, so that the pocket 6 in which the means A for suppressing the amount of movement of the retainer in the radial direction is set and the pocket 6 in which the means B for suppressing the amount of axial movement are set. 'Are arranged alternately.
Therefore, in the case of the present embodiment, the pocket 6 in which the means A for suppressing the amount of movement of the cage in the radial direction is set and the pocket 6 'in which the means B for suppressing the amount of movement in the axial direction are set are equally distributed at 120 °. positioned.
In FIG. 21, when the means A for suppressing the amount of movement of the cage in the radial direction is set in the black-painted pockets 6, the means for suppressing the amount of movement in the axial direction is set for the hatched pocket 6 '. .
FIG. 22 shows a crown type retainer 4 having seven pockets, in which three pockets 6 are provided with means A for suppressing the amount of movement of the retainer in the radial direction, and the other three pockets 6 'are provided with: It shows a positional relationship in a mode in which means B for suppressing the amount of axial movement is set.
In the case of FIG. 22, the pocket 6 in which the means A for suppressing the amount of movement of the cage in the radial direction is set and the pocket 6 'in which the means B for suppressing the amount of movement in the axial direction are set are not equally distributed at 120 °. Are set so as to be as even as possible 120 °. In the present embodiment, since different suppression means are set for each pocket, the pocket 6 in which the means A for suppressing the amount of movement of the retainer in the radial direction is set and the means B for suppressing the amount of movement in the axial direction are set. The pockets 6 'are arranged alternately.
In FIG. 22, when the black-painted pocket 6 sets the means A for suppressing the radial movement amount of the retainer, the hatched pocket 6 'sets the means B for suppressing the axial movement amount.
In FIG. 22, when the means A for suppressing the amount of movement of the retainer 4 in the radial direction is set in three places, and the means B for suppressing the amount of movement in the axial direction are set in the other three places, the remaining one pocket 6 "Is set to a pocket having a known shape, preferably, the radial gap and the axial gap with the ball 3 are set to be larger. The pocket 6" restrains the ball 3, or the ball 3 Is set so that it does not rotate. However, depending on various conditions such as operating conditions of the bearing, machining of the cage, etc., means A for suppressing the amount of movement in the radial direction of the cage, or suppressing the amount of movement in the axial direction. It is also possible to set means B or both.
FIG. 23 shows a crown type retainer 4 having eight pockets, in which three pockets 6 are provided with means A for suppressing the amount of radial movement of the retainer, and the other three pockets 6 'are provided with axial movements. It shows a positional relationship in a mode in which the means B for suppressing the amount is set.
In the case of FIG. 23, the pocket 6 in which the means A for suppressing the amount of movement of the retainer in the radial direction is set and the pocket 6 'in which the means B for suppressing the amount of movement in the axial direction are set are not equally distributed at 120 °. Are set so as to be as even as possible 120 °.
The pockets shown in FIG. 23 have different restraining means, so that the pocket 6 in which means A for suppressing the amount of movement of the retainer in the radial direction is set and the pocket 6 in which means B for suppressing the amount of movement in the axial direction are set. 'Are arranged alternately.
In FIG. 23, when the black-painted pocket 6 sets the means A for suppressing the amount of movement of the retainer in the radial direction, the hatched pocket 6 'sets the means B for suppressing the amount of movement in the axial direction.
In FIG. 23, when the means A for suppressing the amount of movement in the radial direction of the retainer 4 is set at three places, and the means B for suppressing the amount of movement in the axial direction are set at the other three places, the remaining two pockets 6 ″ Is set to a well-known pocket, preferably, the radial gap and the axial gap with the ball 3 are set to be larger, and the pocket 6 "restrains the ball 3, or the ball 3 is the pocket 6". Is set so as not to rotate. However, depending on various conditions such as operating conditions of the bearing, machining of the cage, etc., means A for suppressing the amount of movement of the cage in the radial direction or suppressing the amount of movement of the cage in the axial direction. It is also possible to set means B or both.
[0017]
FIGS. 18 to 23 are examples in which means A for suppressing the amount of movement in the radial direction of the retainer, means B for suppressing the amount of movement in the axial direction, or both are set for three pockets. The total number of pockets is applicable to cages other than 6, 7, and 8, and may be set so as to be evenly distributed at 120 ° or as evenly as possible at 120 °.
The remaining pockets 6 "are set to pockets of a known shape. Preferably, the radial gap and the axial gap with the ball 3 are set to be larger, and the pocket 6" restrains the ball 3, Alternatively, it is also possible to set so that the ball 3 does not rotationally drive the pocket 6 ″, or to suppress the amount of movement of the retainer 4 in the radial direction.
[0018]
FIG. 24 shows a crown type cage having eight pockets, in which all of the four pockets 6 are provided with a means A for suppressing the amount of radial movement of the retainer and a means B for suppressing the amount of axial movement. 3 shows the positional relationship of the form set in advance (that is, each pocket 6 has an A + B configuration).
The four pockets 6 in FIG. 24 are located at 90 ° equidistant. The other pockets 6 ″ in FIG. 24 are set to well-known pockets, and preferably, the radial gap and the axial gap with the ball 3 are set larger, and the pocket 6 ″ restrains the ball 3. Alternatively, the setting is made so that the ball 3 does not rotate the pocket 6 ″.
FIG. 25 shows that in a crown type cage having nine pockets, means A for suppressing the amount of movement in the radial direction and means B for suppressing the amount of movement in the axial direction are respectively set in all four pockets 6. (I.e., each pocket 6 has an A + B configuration).
In FIG. 25, since there are nine pockets, the above-mentioned A + B pockets 6 are not positioned at 90 ° equidistant positions. In such a case, the pockets 6 are set so as to be at 90 ° equidistant positions as much as possible. .
The other pockets 6 ″ are set to well-known pockets, and preferably, the radial gap and the axial gap with the ball 3 are set to be larger, and the pocket 6 ″ restrains the ball 3 or The pocket 6 "is set so that the ball 3 is not restrained or the ball 3 does not rotationally drive the pocket 6".
FIG. 26 shows that, in the crown type cage 4 having ten pockets, the means A for suppressing the amount of radial movement of the cage and the means B for suppressing the amount of axial movement are provided in each of the four pockets. This shows the positional relationship of each set form (that is, each pocket 6 has an A + B configuration).
In FIG. 26, since there are ten pockets, the above-mentioned A + B pockets 6 are not positioned at 90 ° equidistant positions. In such a case, the pockets 6 are set so as to be at 90 ° equidistant positions as much as possible. .
The other pockets 6 ″ are set to pockets of a known shape, preferably, the radial gap and the axial gap with the ball are set to be larger, and the pocket restrains the ball, or the ball is The ball is restrained or set so that the ball does not rotate the pocket.
[0019]
FIG. 27 shows that in a crown type cage having eight pockets, means A for suppressing the amount of radial movement of the cage are set in four pockets 6, and axial movement in the other four pockets 6 ′. It shows a positional relationship in a mode in which the means B for suppressing the amount is set.
Each of the pockets in FIG. 27 has different restraining means, so that the pocket 6 in which the means A for suppressing the amount of movement of the retainer in the radial direction is set and the pocket 6 in which the means B for suppressing the amount of axial movement are set. 'Are arranged alternately.
In the case of FIG. 27, the pocket 6 in which the means A for suppressing the amount of movement of the retainer in the radial direction is set and the pocket 6 'in which the means B for suppressing the amount of movement in the axial direction are set are equidistant from each other. I have.
In FIG. 27, when the black-painted pocket 6 sets the means A for suppressing the amount of movement of the cage in the radial direction, the hatched pocket 6 'sets the means B for suppressing the amount of movement in the axial direction.
FIG. 28 shows a crown type cage having nine pockets, in which four pockets 6 are provided with means A for suppressing the amount of radial movement of the cage, and the other four pockets 6 'are provided with axial movements. It shows a positional relationship in a mode in which the means B for suppressing the amount is set.
In the case of FIG. 28, the pocket 6 in which the means A for suppressing the amount of movement of the retainer in the radial direction and the pocket 6 'in which the means B for suppressing the amount of movement in the axial direction are not equally distributed at 90 °, respectively. The position is set so as to be as evenly distributed as possible by 90 °.
In the pocket of FIG. 28, different restraining means are set respectively, so that the pocket 6 in which means A for suppressing the amount of movement of the retainer in the radial direction is set and the pocket 6 in which means B for suppressing the amount of axial movement are set. 'Are arranged alternately.
In FIG. 28, when the black-painted pocket 6 sets the means A for suppressing the radial movement amount of the cage, the hatched pocket 6 'sets the means B for suppressing the axial movement amount.
In FIG. 28, when the means A for suppressing the amount of movement of the cage in the radial direction is set at four positions, and the means B for suppressing the amount of movement in the axial direction are set at the other four positions, the remaining one pocket 6 ″ Is set in a well-known pocket, preferably, the radial gap with the ball and the axial gap are set larger, so that the pocket does not restrain the ball, or the ball does not rotate the pocket. Set as follows.
However, depending on various conditions such as the operating conditions of the bearing, machining of the cage, etc., it is possible to set the means A for suppressing the amount of radial movement of the cage, the means B for suppressing the amount of axial movement, or both. It is.
FIG. 29 shows that in a crown type cage having ten pockets, means A for suppressing the amount of movement of the cage in the radial direction are set in four pockets 6, and an axis is set in the other four pockets 6 '. It shows a positional relationship in a mode in which means B for suppressing the amount of directional movement is set.
In the case of FIG. 29, the pocket 6 in which the means A for suppressing the amount of movement of the retainer in the radial direction and the pocket 6 'in which the means B for suppressing the amount of movement in the axial direction are not equally distributed at 90 °, respectively. The position is set so as to be as evenly distributed as possible by 90 °.
Since the pockets in FIG. 29 each have different restraining means, the pocket 6 in which means A for restraining the amount of movement of the retainer in the radial direction is set and the pocket 6 in which means B for suppressing the amount of axial movement are set. 'Are arranged alternately.
In FIG. 29, when the black pocket 6 sets the means A for suppressing the amount of movement of the retainer in the radial direction, the hatched pocket 6 'sets the means B for suppressing the amount of movement in the axial direction.
In FIG. 29, when means A for suppressing the amount of movement in the radial direction of the retainer are set at four places, and means B for suppressing the amount of movement in the axial direction are set at the other four places, the remaining two pockets 6 ″ Is set in a well-known pocket, preferably, the radial gap with the ball and the axial gap are set larger, so that the pocket does not restrain the ball, or the ball does not rotate the pocket. Set as follows.
However, depending on various conditions such as the operating conditions of the bearing, machining of the cage, etc., it is possible to set the means A for suppressing the amount of radial movement of the cage, the means B for suppressing the amount of axial movement, or both. It is.
[0020]
FIGS. 24 to 29 are examples in which the means A for suppressing the amount of movement in the radial direction of the retainer, the means B for suppressing the amount of movement in the axial direction, or both are set for the four pockets. The total number of pockets is also applicable to cages other than 8, 9, and 10, and may be set so as to be evenly distributed at 90 ° or as evenly as possible.
However, when three locations (120 ° equidistant) can be set, the embodiments shown in FIGS. 18 to 23 can be applied.
The remaining pocket 6 "is set to a well-known pocket, and preferably, the radial gap and the axial gap between the ball and the ball are set to be larger, so that the pocket restrains the ball or the ball holds the ball. It is also possible to set so that the pocket is not driven to rotate, or to set the means A for suppressing the amount of radial movement of the retainer, the means B for suppressing the amount of axial movement, or both.
FIGS. 18 to 29 show an example in which means A for suppressing the amount of movement in the radial direction of the retainer, means B for suppressing the amount of movement in the axial direction, or both are set for three or four pockets. Although shown, it is also possible to set means A for suppressing the amount of movement of the retainer in the radial direction and / or means B for suppressing the amount of movement in the axial direction in all the pockets.
[0021]
FIGS. 30 to 32 show an example in which means A for suppressing the amount of movement in the radial direction of the retainer, means B for suppressing the amount of movement in the axial direction, or both are set for two pockets. However, as shown in FIGS. 30 and 32, it is preferable that the set pockets 6 are located at symmetric positions. However, when the pockets 6 are not located at the symmetric positions, the two pockets which are located at the symmetric positions as much as possible are provided. Set for
In the figure, when the means A for suppressing the radial movement amount of the cage is set for one of the pockets 6 at the blacked position, the pocket 6 at the other blacked position becomes the axial movement amount. Is set.
When one of the pockets 6 in the blackened position sets both the means A for suppressing the amount of movement of the retainer in the radial direction and the means B for suppressing the amount of movement in the axial direction, the other blackened position is used. The position pocket sets the means A for suppressing the amount of movement in the radial direction, the means B for suppressing the amount of movement in the axial direction, or both.
[0022]
【The invention's effect】
The present invention has a configuration as described above, so that the lubrication state of the balls and the inner and outer raceway grooves is not deteriorated, there is no possibility of occurrence of wear and seizure, and the radial movement amount of the retainer and the axial direction It is possible to provide a crown type cage capable of suppressing both the amount of movement and a ball bearing using the cage.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing one embodiment of a ball bearing using a crown type cage of the present invention.
FIG. 2 is a perspective view showing an embodiment of a crown type retainer.
FIG. 3 is an enlarged schematic cross-sectional view illustrating an embodiment of a retainer radial movement amount suppressing unit.
FIG. 4 is an enlarged schematic cross-sectional view showing one embodiment of a retainer radial movement amount suppressing means.
FIG. 5 is an enlarged schematic cross-sectional view illustrating an embodiment of a retainer radial movement amount suppressing unit.
FIG. 6 is an enlarged schematic cross-sectional view showing one embodiment of a retainer radial movement amount suppressing means.
FIG. 7 is an enlarged schematic cross-sectional view showing one embodiment of a retainer radial movement amount suppressing unit.
FIG. 8 is an enlarged schematic cross-sectional view illustrating an embodiment of a retainer radial movement amount suppressing unit.
FIG. 9 is an enlarged schematic cross-sectional view illustrating an embodiment of a retainer radial movement amount suppressing unit.
FIGS. 10A and 10B show an embodiment in which the axial gap of the cage pocket is set to be smaller than the circumferential gap. FIG. 10A shows the circumferential gap of the pocket, and FIG. 10B shows the axial gap. Show.
FIG. 11 is an enlarged schematic cross-sectional view showing an embodiment of a retainer radial movement amount suppressing means.
FIG. 12 is an enlarged schematic cross-sectional view illustrating an embodiment of a retainer axial movement amount suppressing unit.
FIG. 13 is an enlarged schematic cross-sectional view showing an embodiment of a retainer axial movement amount suppressing unit.
FIG. 14 is an enlarged schematic cross-sectional view showing one embodiment of a retainer axial movement amount suppressing unit.
FIG. 15 is an enlarged schematic cross-sectional view illustrating an embodiment of a retainer axial movement amount suppressing unit.
FIG. 16 is an enlarged schematic cross-sectional view showing one embodiment of a retainer axial movement amount suppressing unit.
FIG. 17 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 18 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 19 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 20 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 21 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 22 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 23 is a schematic view showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 24 is a schematic diagram showing an example of a pocket position to which the cage radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 25 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 26 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 27 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 28 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 29 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 30 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 31 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppressing means and the axial movement amount suppressing means are applied.
FIG. 32 is a schematic diagram showing an example of a pocket position to which the retainer radial movement amount suppression means and the axial movement amount suppression means are applied.
FIG. 33 is a schematic cross-sectional view showing a gap between the ball and the inner surface of the cage pocket.
FIG. 34 is a schematic sectional view showing a gap between the ball and the inner surface of the cage pocket.
FIG. 35 is a schematic sectional view showing the amount of movement of the cage in the radial and axial directions.
FIG. 36 is an enlarged sectional view showing the prior art.
FIG. 37 is an enlarged sectional view showing the prior art.
[Explanation of symbols]
1: Outer ring
2: Inner ring
3: Ball
4: Crown type cage
6: Pocket
7: protrusion
Lr: circumferential gap
La: axial gap
A: Cage radial movement suppression means
B: Cage axial movement suppression means

Claims (5)

A crown type retainer having a plurality of pockets and a part of the inner surface of the pocket being open,
A crown type cage for a ball bearing, wherein at least one or more pockets are provided with a cage radial movement amount suppressing means and a cage axial movement amount suppressing means. The retainer radial movement amount suppressing means has a protrusion provided on one or both of the inner diameter side edge portion and the outer diameter side edge portion of the pocket so as to face the axial line segment of the pocket. 2. The holder according to claim 1, wherein the retainer axial movement amount suppressing means has a pocket surface formed of a single or a plurality of curved surfaces in which an axial gap of the pocket is set smaller than a circumferential gap. Ball cage for ball bearings. A crown type retainer having a plurality of pockets and a part of the inner surface of the pocket being open,
A ball bearing crown mold wherein at least a plurality of pockets are provided with a cage radial movement amount suppressing means, and at least a plurality of pockets other than the pockets are provided with a cage axial movement amount suppressing means. Retainer. The retainer radial movement amount suppressing means includes a protrusion provided on one or both of the inner diameter side edge portion and the outer diameter side edge portion of the plurality of pockets so as to be opposed to the axial line segment of the pocket. The retainer axial movement amount suppressing means has a pocket surface formed of a single or a plurality of curved surfaces in which an axial gap of at least a plurality of pockets other than the pocket is set smaller than a circumferential gap. The crown type retainer for a ball bearing according to claim 3, wherein the retainer has a crown. A ball bearing comprising the ball bearing crown retainer according to claim 1.

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