JPS5927539Y2 - Split cage for rolling bearings - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of a split type cage for a rolling bearing.

Split cages are used for bottom roller bearings in textile machines and the like.

As shown in Fig. 2, this split type cage consists of an annular cage member 1 made of an elastic material such as synthetic resin, which is divided in the axial direction at one point on the circumference. A plurality of cylindrical rollers 2 are arranged so as to be freely transferable.

As shown in FIG. 3, this split type cage is attached to a rotary shaft 4 having a stepped portion on its circumferential surface and has a small diameter shaft portion 3 so as to surround the small diameter shaft portion 3, and is fitted with a plurality of cylindrical rollers. An outer ring 5 or housing is fitted onto the outer circumferential surface on which the rotating shafts 2 are arranged, and is used to rotatably support the rotating shaft 4.

By the way, as shown in FIG. 4, in the conventional split type cage of this type, each of the ends of the cage member 10, which is divided in the axial direction at one point on the circumference, has an axial direction of the cage member 1. Two sloped surfaces 1 whose length dimension is divided into two and whose slope directions are different from each other.
a, Ib are formed, and the two divided ends are arranged such that the opposing inclined surfaces 1a, 1a and 1b, 1b are engaged with each other in opposition.

In addition, the cage member 1 has a window portion 1c into which the cylindrical rollers 2 are fitted.
is formed.

When such a split type cage is fitted to the outer ring 5 or the housing as shown in Fig. 3, the outer peripheral surface of the cage member 1 and the inner peripheral surface of the outer ring 5 or the housing are attached. A slight gap is formed between the opposing faces, so that during rotation of the rotating shaft 40 supported by the outer ring 5 or the housing, as shown in FIG. The cage member 1 rotates while repeating opening and closing within the range of the dimensional difference t between the inner diameter of the retainer member 1 and the outer diameter of the retainer member 1.

Therefore, although the displacement of the retainer member 1 in the axial direction is prevented by the axial locking surface 1d located perpendicular to the axial direction, the displacement in the radial direction is carried out as shown by the broken line, and the displacement in the radial direction is carried out around the divided end surface. There were problems such as abnormal wear and sometimes damage.

Therefore, in order to solve these problems, as shown in FIG. It has a length that bisects the axial length from the surface, and extends in the radial direction of the retainer member 60 from the corner between the inner and outer circumferential surfaces and the end surface of the divided end, parallel to the end surface and the curved surface. Engagement step portions 60b and 60b' are formed by cutting approximately half the length of the thickness dimension, and one of the engagement step portions 60b is located on the outer circumferential side of one side, and the other engagement step portion 60b is notched on the outer peripheral side of one side. ' is located on the inner peripheral side of the other side, and these retaining steps 60 b and 60 b' have an axial lock that prevents the divided end of the retainer member 60 from shifting in the axial direction. A surface 601 and a radial locking surface 602 that prevents displacement in the radial direction are formed, and a circumferential locking surface 603 that restricts movement in the circumferential direction is formed in the notch. The other divided end opposite to the divided end on which the engaging stepped portions 60b and 60b' are formed also has a complementary stepped portion having the same size and shape as the engaging stepped portions 60b and 60b'. The applicant of the present application proposed a structure in which the retaining step portions at the two divided ends fit into each other and engage with each other (Utility Application No. 53-60'02).

According to such a cage member, deviation in the axial direction is temporarily stopped by the axial locking surface 601, and deviation in the radial direction is temporarily stopped by the radial locking surface 602, so that abnormal wear and damage are prevented. Although this is prevented, there is a problem in that sufficient protection cannot be achieved depending on the direction of twisting from abnormal wear and damage caused by twisting with respect to the axis.

In view of the various problems mentioned above, the present invention has a structure in which twist prevention surfaces are also formed on opposing divided end surfaces of the retainer member to prevent twisting about the axis, and both opposing divided end surfaces are engaged. The present invention proposes a split type cage that solves the problems of the conventional type by making each side face each other and further improves the reliability of the split type cage.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The split cage for a rolling bearing according to the present invention will be described in detail below with reference to drawings showing embodiments.

FIG. 1 is a perspective view of a divided end face of a split cage according to the present invention.

In FIG. 1, 10 is a split cage member, and 10a is a window into which a cylindrical roller is inserted.

One divided end of the cage member 10 has the cage member 1
00 having a length that divides the axial length into two from both side surfaces, and extending from the corner between the inner and outer circumferential surfaces and the end surface of the divided end in parallel to the end surface and the circumferential surface. The engaging step portions 10b each have a notch corresponding to approximately 1/3 of the radial thickness of the engaging step portions 10b.
, 10b' are formed.

One of the engaging step portions 10b is located on the outer periphery of one side of the retainer member 10, and the other engaging step portion 10b' is located on the inner periphery of the other side, so that they are diagonally arranged.

In the approximately 1/3 thickness portion in the radial direction remaining between the engagement step portions 10b and 10b' formed at the inner and outer circumferential sides of the retainer member 10 in the radial direction, From the end surface of the divided end portion, a long surface of the cage member 100 is parallel to the end surface,
A retaining groove 10c is formed with a dimension slightly longer than the length dimension in the circumferential direction cut out to form the engagement step portions 10b, 10b' and extending over the entire length in the axial direction.

The engagement step portions 10b and 10b' include an axial locking surface 101 that prevents the divided end portion of the retainer member 10 from deviating in the axial direction, and an axial locking surface 101 that prevents the divided end portion of the retainer member 10 from deviating in the radial direction. A radial locking surface 102 is formed, and a circumferential locking surface 103 that restricts movement in the circumferential direction is formed in the notch.

These engagement step portions 10b, 10b' and engagement groove 1
The end face of the other divided end opposite to the divided end on which 0c is formed is opposite to the engaging stepped portion 10b so as to have a complementary uneven relationship with the end face of the one divided end. An engaging stepped portion 11b is provided on the inner circumferential side portion, a retaining step portion 11b′ is provided on the outer circumferential side portion of the side opposite to the retaining stepped portion 10b′, and the radially central portion, that is, the engaging stepped portion 11b′ Engaging protrusions ties are provided in the portions facing the grooves 10c, respectively, and by joining both the divided ends, the two are joined, and each retaining stepped portion and the facing notch are connected to each other.
Further, the retaining groove and the engaging protrusion are adapted to fit into each other.

Therefore, even when facing the other divided end, the axial locking surface 101 and the radial locking surface 102 are the same as in the one dividing end.
, a circumferential locking surface 103 is formed in the notch.

Furthermore, the engagement groove 10c is recessed more than the notch for forming the engagement steps 10b and 10b', and conversely, the engagement protrusion 11c protrudes more than the engagement steps 11b and 11b'. Both will have twist prevention surfaces on their respective upper and lower surfaces.

Since both of the ribs extend the entire length in the axial direction, any twisting applied to the retainer in either direction will be prevented.

Note that one side of the window portion 10a is cut out at the side located on the outer peripheral side of the retainer member 10 so as to have a substantially trapezoidal shape when viewed from the side.

When this split type cage is assembled into a rotating shaft, first, cylindrical rollers are fitted and held in each window 10a of the cage member 10, and then the space between the divided end faces of the cage member 10 is widened. As a result, the retainer member 100 is fitted onto the rotating shaft by elastic force, and an outer ring or housing is fitted onto the outer peripheral surface of the cylindrical rollers arranged in plurality to complete the assembly.

At the opposing divided ends of the cage member 10 mounted in this way, the notch facing the engagement step 10b etc., and the engagement groove 10c and the engagement protrusion 11c engage with each other, Further, the axial locking surface 101, the radial locking surface 102, the circumferential locking surface 103, and the twist prevention surface 104 of both divided ends are in contact with each other.

Therefore, even if a force such as a force that causes the divided end of the retainer member 10 to deviate in the axial direction or radial direction or a force such as twisting with respect to the axial center line is applied due to the rotation of the rotating shaft, the axial locking surface 101 and the radial The two divided end surfaces are in contact with each other at the direction locking surface 102, so that the divided end does not deviate in the axial and radial directions, and is divided by the torsion prevention surfaces 104 that are in contact with each other over the entire length of the twisted axial direction. The ends cannot be deflected.

As described in detail above, in the split cage according to the present invention, the engagement step and the opposing notch, and the engagement groove and the engagement protrusion formed on the opposing divided ends of the cage member 10 engage with each other. When combined, the axial locking surface 101, the radial locking surface 102, and the torsional locking surface 104
etc. are arranged so that they are in contact with each other, so even if the rotating shaft on which these parts are attached rotates, the two divided ends will not move in any of the axial direction, radial direction, circumferential direction, or twisting direction with respect to the axial center line. There is no deviation, and therefore no abnormal wear occurs around the divided end, and there is no risk of damage.

Further, even when the split cage is used for a long time, the joint state of the divided ends does not change at all, and the reliability and durability of the split cage can be significantly improved.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the divided end of a split cage for a rolling bearing according to the present invention, Fig. 2 is a structural diagram of a general split cage, and Fig. 3
The figure is a schematic cross-sectional view showing the split cage attached to the rotating shaft, Figure 4 is a perspective view showing the divided end of a conventional split cage, and Figure 5 is a conventional split cage. FIG. 6 is a partial side view of the split cage showing a state in which the split end is deviated in the radial direction, and FIG. 6 is a perspective view showing the split end of another split cage. 1...Split cage, 2...Cylindrical roller,
10...Cage member, 10b, 10b'...
...Engagement step portion, 101...Axial direction locking surface, 1
02... Radial locking surface, 105... Circumferential locking surface, 104... Twisted locking surface.

Claims (1)

[Scope of utility model registration request] In a split type cage for a rolling bearing in which an annular cage member is divided at one point on the circumference in the axial direction, one divided end has a portion approximately at the center in the radial direction of the end surface. an engaging groove extending in the axial direction, and a groove that is shallower in the circumferential direction than the engaging groove and shorter than the axial length of the retainer member at the corner of the inner and outer circumferential surfaces of the retainer member and the end face, and opposite to each other. A plurality of engagement steps formed by notches in a corner arrangement are provided, and the other divided end is provided with a groove in the radial direction of the end surface so as to have a complementary uneven relationship with the end surface of the one divided end. an engaging protrusion that extends in the axial direction and engages with the engaging groove at approximately the center of the retainer member; A split retainer for a rolling bearing, characterized in that it is provided with an engaging stepped portion that engages with the engaging stepped portion of the stump.