JP2000161366A - Cross roller bearing and retainer for cross roller bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cross roller bearing capable of obtaining various effects that all rollers are stably rotated without generating a skew while being free from noises and so on, and provide a retainer capable of performing the above- mentioned effects. SOLUTION: In this cross roller bearing wherein an inner race over the outer circumferential surface of which a groove in a V-shape in cross section is formed, and an outer race over the inner circumferential surface of which a groove in a V-shape in cross section is formed, are coaxially disposed so as to allow an raceway to be formed between these grooves, and also allow the plural number of rollers 30 to be arranged and housed in while each rotary axis is appropriately made different in direction, a ring shaped retainer 40 made out of resin is housed in the aforesaid raceway, and this retainer comprises each spacer part 41 interposed between adjacent rollers and a connecting part 43 connecting each spacer part with each other, integrally formed up.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cross roller bearing and a retainer used for the same.

[0002]

2. Description of the Related Art Cross roller bearings are known as being capable of simultaneously receiving loads in all directions such as an axial load, a radial load, and a moment load with a single belling, while having a simple structure. Usually, in the cross roller belling, means for aligning each roller is provided. Conventionally, there is a cross roller bearing provided with a metal retainer as means for aligning the rollers. This retainer is formed by forming a thin metal plate into a short cylindrical shape, and windows are provided at equal intervals in a circumferential direction, and a roller is accommodated in each window. Further, as a cross roller bearing having another configuration, a cross roller bearing in which a resin spacer (spacer retainer) is interposed between rollers is known.

[0003]

Since the metal retainer described above has a small contact area with the roller, the holding of the roller is not always stable, so that skew is liable to occur, leading to a reduction in load capacity and an increase in the amount of wear. There is a risk of doing so. In addition, noise may occur due to contact between the metal of the retainer and the roller. It is to be noted that these problems are likely to become significant during high-speed rotation. On the other hand, since the spacer has a large contact area with the roller and is made of resin, the use of the spacer reduces the above problem. However, the clearance between the roller and the spacer (peripheral clearance) constantly changes during rotation, and there is a possibility that the roller at the position where the clearance becomes large causes skew. Also, in order to prevent the spacer itself from falling down, the thickness of the spacer is set to be relatively large, and accordingly the number of rollers is limited, and it is difficult to increase the load capacity. The present invention has been made in view of the above-described drawbacks of the related art, and has various effects such as all rollers rolling stably without causing skew and generating no noise. It is an object of the present invention to provide a cross roller bearing that can be obtained and a retainer that can exhibit the effect.

[0004]

According to a first aspect of the present invention, an inner ring having a V-shaped groove on the outer periphery and an outer ring having a V-shaped groove on the inner periphery are coaxial. A track is formed between the grooves, and a plurality of rollers are arranged on the track in a cross roller bearing in which the directions of the rotation shafts thereof are appropriately changed. The retainer is housed, and this retainer
A spacer interposed between adjacent rollers and a connecting portion connecting the spacers are integrally formed.

According to a second aspect of the present invention, in the cross roller bearing according to the first aspect, the connecting portion extends in a central axis direction of the retainer, and is provided between an outer peripheral surface of the inner race and an inner peripheral surface of the outer race. Characterized in that it is housed in the gap formed in the first position. A third invention is characterized in that, in the cross roller bearing according to the first invention, the connecting portion is housed in a housing groove formed at the bottom of the V-shaped groove of the inner ring and the outer ring. . A fourth invention provides a cross roller ring according to the second or third invention,
The connection portion is provided on one side of each of the spacer portions. A fifth invention is characterized in that, in the cross roller ring according to the second or third invention, the connecting portions are disposed on both sides of each of the spacer portions.

A sixth aspect of the present invention is the cross roller ring according to the first to fifth aspects, wherein the retainer holds a lubricant. According to a seventh aspect, in the cross roller ring according to the first to sixth aspects, the retainer is provided with a lubricant reservoir. An eighth invention is the cross roller ring according to any one of the first to seventh inventions, wherein at least one of the inner ring and the outer ring is configured by connecting a pair of ring members, and the retainer is provided at one position. It is characterized by being cut in a direction intersecting with the circumferential direction and capable of expanding or reducing its diameter by its elasticity. A ninth invention is used for a cross roller bearing in which a plurality of rollers are arranged by appropriately changing the directions of rotation axes, and a retainer for holding the rollers in a state of being equally spaced is formed in an annular shape by resin, It is characterized in that the spacers arranged at intervals in the circumferential direction and a connecting portion connecting the spacers are integrally formed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cross roller bearing according to a first embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 to 3, the cross roller bearing includes an inner ring 10, an outer ring 20, a number of rollers 30 housed between the inner and outer rings 10, 20,
A retainer 40 for holding the rollers 30 in a state of being equally spaced is provided as a basic component.
As shown in FIGS. 1, 3, and 6, the outer peripheral surface of the inner ring 10 forms a cylindrical surface 15, and a groove 16 having a V-shaped cross section is formed at the axial center thereof. The groove 16 includes a pair of conical surfaces 16a facing each other. These conical surfaces 16
a has an inclination of 45 ° with respect to the center axis L of the inner ring 10.

As shown in FIGS. 1, 3, and 6, the outer ring 20 is formed by connecting a pair of ring members 21. Specifically, both ring members 21 have the same shape, and each inner peripheral surface is formed by connecting a cylindrical surface 25 and a conical surface 26a inclined at 45 ° with respect to the central axis L. Is formed. In a state where the pair of ring members 21 are connected to each other, a groove 26 having a V-shaped cross section is formed by the two conical surfaces 26a. The mutually abutting surfaces of the pair of ring members 21 are flat surfaces, and a plurality of grooves 24a extending in the radial direction are formed on the flat surfaces at an angle of, for example, 90 ° in the circumferential direction. These grooves 24a are combined to form a lubricant injection hole 24 communicating with the groove 26.

The inner ring 10 and the outer ring 20 are coaxially arranged on the same plane, and the grooves 16, 26 are opposed to each other to form an annular orbit 50 having a substantially square cross section. ing. The cylindrical surface 15 of the inner ring 10
A gap 55 is formed between the outer ring 20 and the cylindrical surface 25. The inner ring 10 and the outer ring 20 are made of bearing steel (for example, SUJ2) or SUS440C.

Each of the rollers 30 has a cylindrical shape, and is substantially equal in diameter and length in the axial direction (more precisely, slightly larger in diameter), and is housed side by side in the track 50, and its center of rotation is the inner and outer rings. It is inclined by 45 ° with respect to the central axis L of 10, 20. In the case of this embodiment, the rollers 30 are arranged one by one alternately while changing the inclination direction.
When viewed along 0, the rotation axis of the adjacent roller 30 is 90
They cross at an angle of ゜ (FIG. 1, FIG. 4 [C],
[D] and FIG. 5). As a material of the roller 30, steel for bearing (for example, SUJ2) or SUS440C is adopted.

The retainer 40 has an annular shape and is accommodated in a track 50 between the inner ring 10 and the outer ring 20.
It is coaxial with 0 and 20. As shown in FIGS. 4 to 7, the first spacer 41 and the second spacer 42 are alternately arranged at equal intervals in the circumferential direction so as to be interposed between adjacent rollers. And these spacers 41, 4
And a pair of connecting portions 43 connected in series. These components 41, 42, and 43 are integrally formed using a synthetic resin as a material. The material and manufacture of the retainer 40 will be described later in detail.

The pair of connecting portions 43 have the same diameter and form an annular band (short cylindrical shape).
Facing apart in the direction. As shown in FIG. 6, the pair of connecting portions 43 form a gap 5 between the cylindrical surface 15 (outer peripheral surface) of the inner ring 10 and the cylindrical surface 25 (inner peripheral surface) of the outer ring 20.
5 is inserted.

The spacers 41 and 42 are disposed between the pair of connecting portions 43. As shown in FIG. 6, these spacers 41, 42 have a square shape in which the cross-sectional shape along the radial direction of the inner and outer rings 10, 20 is smaller than the cross-section of the track 50. Have been. In this state, the radially inner portions of the spacers 41 and 42 project so as to enter the V-shaped groove 16 of the inner race 10, and the two cones of this portion (a portion forming a right-angled triangle) The surfaces face the conical surface 16a of the groove 16, respectively. Similarly, the radially outer portions of the spacers 41 and 42 project so as to enter the V-shaped groove 26 of the outer race 20, and the two conical surfaces of this portion are
Conical surface 26a.

Both sides of the first spacer 41 (retainer 40)
Are inclined at 45 ° with respect to the central axis L of the retainer 40 and have different inclination directions.
1a and 41b are formed. Similarly, the second spacer 42
The cylindrical surfaces 42a and 42b are also formed on both sides. A notch 43a is formed in the connecting portion 43,
In the notch 43a, the cylindrical surfaces 41a, 41b, 42
a, a cylindrical surface connected to 42b is formed.

One cylindrical surface 41a of the first spacer 41 (a cylindrical surface located in a counterclockwise direction as viewed from the center in the circumferential direction of the first spacer 41) and one cylindrical surface of the second spacer 42 Face 42
a (a cylindrical surface located clockwise as viewed from the center of the second spacer 42 in the circumferential direction), an accommodation space 45a for accommodating the roller 30 is formed. Similarly, the other cylindrical surface 41b of the first spacer 41 and the second spacer 42
An accommodation space 45b for accommodating the roller 30 is formed between the other cylindrical surface 42b.

As shown in FIGS. 4C and 4D, the center axes Ka and Kb of the housing spaces 45a and 45b are inclined by 45 ° with respect to the center axis L of the retainer 40, but the inclination directions are different. Are orthogonal to each other. Therefore, the rollers 30 housed in the housing spaces 45a and 45b are arranged such that the directions of inclination of the rotation centers thereof are alternately changed. Note that the arrangement of the rollers 30 may be such that the rotation centers do not alternate alternately one by one as in the present embodiment but alternately every third or third rotation. Is possible. As shown in FIG. 6, the peripheral surface of the roller 30 accommodated in the one accommodation space 45 a is formed of one conical surface 16 a (the upper conical surface in FIG. 6) of the groove 16 of the inner ring 10 and the groove 26 of the outer ring 20. It is in contact with one conical surface 26a (the lower conical surface in FIG. 6). Similarly, the peripheral surface of the roller 30 housed in the other housing space 45b is
The other (lower) conical surface 16 a of the groove 16 of the outer ring 20 is in contact with the other (upper) conical surface 26 a of the groove 26 of the outer race 20.

As shown in FIGS. 4 (A) and 4 (B), the retainer 40 is cut at one location in a direction crossing the circumferential direction, and in the present embodiment, in a direction (diameter direction) orthogonal to the circumferential direction.
Specifically, a pair of connecting portions 43 corresponding to the accommodation holes 45b are provided.
Is disconnected. This cutting line is indicated by reference numeral 48 in the figure. Since the retainer 40 is made of resin and has elasticity,
As shown by arrows in FIG. 4A, elastic deformation is freely performed so as to increase the diameter (to separate the two ends facing each other along the cutting line 48) and to reduce the diameter in reverse. Can be. Since the spacers 41 and 42 and the pair of connecting portions 43 are located on the virtual cylindrical surface, the elastic deformation is relatively easy.

By cutting the retainer 40 at one place as described above, the cross roller bearing can be assembled using the inner and outer rings that are not split in half in the radial direction. That is, for example, as in the present embodiment, if the outer ring 20 is configured such that the pair of ring members 21 are connected, the bearing can be assembled, and a cut may occur in the middle of the V-shaped groove. And smooth rolling of the rollers is guaranteed. The assembly of the cross roller bearing will be described later. In the present embodiment, the outer ring 20 is constituted by a pair of ring members. However, at least one of the inner and outer rings 10 and 20 may be configured to be split in this way.

As shown in FIGS. 6 and 7, the groove 2 of the outer race 20 is formed in the spacers 41 and 42 of the retainer 40.
A lubricating groove 49 is formed in the conical surface of the portion entering the groove 6 as a lubricating groove that extends in the circumferential direction of the retainer 40. By providing the lubricant reservoir groove 49, the lubricant once supplied / filled, for example, grease or ordinary lubricating oil is retained for a long period of time, and the lubricating state is maintained for a long period without lubrication, so-called maintenance-free. To contribute. As will be described later, when the retainer 40 itself is to be held by immersing the lubricating oil therein, in combination with the lubricant retaining function by the lubricant reservoir groove 49,
Even without the supply of lubricant, lubrication is performed for an extremely long time, and maintenance-free operation is realized. The lubricant reservoir for retaining the lubricant is not limited to the lubricant reservoir groove 49 as described above, and various configurations can be adopted.

Here, the material and manufacturing method of the retainer 40 will be described. First, the material of the retainer 40 is a synthetic resin, for example, a polyamide elastomer or a polyester elastomer. It is manufactured by injection molding using such a material. Specifically, a dummy roller slightly larger in diameter than the roller 30 is appropriately arranged in a molding die, and a molten synthetic resin is injected into the die, cooled, solidified, and then released. The retainer 40 is completed by extracting the dummy ball from the molded body thus obtained. As described above, if the retainer 40 is formed by using a dummy roller having a larger diameter than the actual roller 30 as a core, the cylindrical surfaces 41a, 41b, and 4 of the spacers 41 and 42 described above can be formed.
Since 2a and 42b are formed following the peripheral surface of the dummy roller, they can be easily formed as curved surfaces having a radius of curvature larger than the radius of the roller 30. Instead of the dummy roller, a projection having the same size as the dummy roller may be formed on the molding surface of the molding die, and the projection may be removed from the molded body with release.

On the other hand, instead of using the dummy roller, it is also possible to insert the roller 30 itself as a core into a molding die from the beginning, thereby molding the retainer 40. However, in this case, since the roller 30 and the molded body are in close contact with each other, the molded body taken out of the mold is immersed in a mineral oil-based lubricating oil as it is, and the synthetic resin molded body is swollen with the lubricating oil. Thus, the cylindrical surfaces of the spacers 41 and 42 have curved radii larger than the radius of the roller 30.

In the retainer 40 formed as described above,
A gap is formed between the roller 30 and the spacers 41 and 42, so that the roller 40 can freely rotate with respect to the spacer.

By immersing the molded body in the lubricating oil as described above, the retainer 40 itself impregnates (holds) the lubricating oil.
In addition, the durability is improved, and the lubrication state is maintained for a long time without refueling, so that maintenance-free operation is achieved. The amount of the lubricating oil impregnated in the retainer 40 can be adjusted by appropriately selecting the material of the retainer itself and the type of the lubricating oil impregnated therein. Further, in the present embodiment, the lubricating oil is impregnated after being formed into a predetermined shape with the synthetic resin. In addition, lubricating oil may be mixed with the monomer at the stage of producing a synthetic resin by polymerizing the monomer, and the resulting lubricating oil-containing synthetic resin may be molded into a predetermined shape.

In the above configuration, the roller 30 rolls in the track 50 when the inner and outer rings 10 and 20 are relatively rotated.
At this time, the retainer 40 is also
It rotates along the orbit 50. Since the spacers 41 and 42 of the retainer 40 have a large contact area with the roller 30, the holding of the roller 30 is stable and skew hardly occurs. In addition, since the spacers 41 and 42 are connected to each other by the connecting portion 43, the cylindrical surface 41 of the spacers 41 and 42
The clearance (the circumferential clearance) between the rollers a, 41b, 42a, and 42b and the roller 30 hardly changes, and skew does not occur in some of the rollers due to the clearance. From these facts, all the rollers 30 roll stably, the load capacity is secured, and the amount of wear is reduced. In addition, since the retainer 40 is made of resin, the sound generated by the contact with the roller 30 also has an extremely low level. During high-speed rotation, centrifugal force acts on the spacers 41 and 42, and the contact stress acting between the spacers and the rollers is reduced.

The spacers 41 and 42 are connected to a connecting portion 43.
It is not necessary to set the thicknesses of the spacers 41 and 42 to be large in order to prevent them from falling down. Therefore, the thickness of the spacer, that is, the dimension between the rollers is minimized, and the number of rollers 30 can be increased to increase the load capacity. In addition, each spacer 4
1 and 42 may each form a cylindrical surface only on one side.

The operation of assembling the cross roller bearing will be described. As described above, while expanding the diameter of the annular retainer 40 so that the two ends facing each other at the cutting line 48 are widened, the annular retainer 40 is made to correspond to the groove 16 of the inner ring 10. To restore. Accordingly, the radially and inwardly projecting portions of the spacers 41 and 42 of the retainer 40 fit into the grooves 16. The retainer 40
Since the radially and inwardly protruding portions of the spacers 41 and 42 become an obstacle, they cannot be mounted on the inner race 10 as they are. In the present embodiment, since the diameter can be temporarily increased by cutting the retainer 40 at one location, the retainer 40 can be mounted on the inner race 10.

Next, the one ring member 21 of the outer race 20 is placed on a horizontal installation surface with the conical surface 26a facing upward. Then, the inner ring 10 to which the retainer 40 is attached is mounted on the installation surface so as to be fitted to the outer ring 20. In this state, the roller 30 is fitted into all of the one receiving hole 45a of the retainer 40. Next, the other ring member 21 of the outer race 20
To the one ring member 21 with the conical surface 26a facing down.
Put on. As a result, an assembly including the inner and outer races 10 and 20 and the retainer 40 in which half of the expected number of rollers 30 are incorporated is formed. Next, the above assembly is turned upside down, and the above one ring member 21 on the upper side is removed. In this state, the roller 30 is fitted into the other accommodation hole 45b of the retainer 40. As a result, all the rollers 30
Will be set to. Next, the one ring member 21 is mounted on the other ring member 21 again, and the pair of ring members 2 is
1 is concluded. Thus, the assembly of the cross roller bearing is completed.

In the present embodiment, the outer ring 20 is constituted by a pair of ring members 21, so the above-described assembling process is performed. However, when the inner ring 10 is constituted by a pair of ring members, the retainer 40 is connected with the above-described retainer 40. The two ends facing each other along the cutting line 48 are reduced in diameter so as to overlap each other, are positioned in the groove 26 of the outer ring 20, are restored to the original annular shape in this state, and are mounted on the outer ring 20.

In this embodiment, the connecting portion 43 of the retainer 40 extends in the direction of the central axis of the retainer, and the cylindrical surface 15 (outer peripheral surface) of the inner ring 10 and the cylindrical surface 25 (inner surface) of the outer ring 20 are formed. (Peripheral surface). According to such a configuration, the space occupied by the retainer 40 is:
It is formed without subjecting the inner ring 10 or the outer ring 20 to special processing such as grooves. Therefore, the rigidity of the inner and outer rings 10 and 20 can be ensured, and the cost reduction in machining can be achieved.

Next, a cross roller bearing according to a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, components corresponding to those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The difference from the first embodiment is that the retainer 40A made of resin has a pair of annular connecting portions 43 ′ and 43 ″.
The point is that it is composed of flat flanges having different diameters. These connecting portions 43 ′ and 43 ″ are separated from each other while being coaxially arranged on the same plane.
42 are arranged. The inner ring 10 and the outer ring 20 are provided with the connecting portions 4 at the bottoms of the grooves 16 and 26 having a V-shaped cross section.
The housing grooves 17 and 27 for accommodating 3 ′ and 43 ″ are respectively formed. According to such a configuration, the connecting portion of the retainer 40 does not need to be housed between the inner ring 10 and the outer ring 20. Therefore, it is possible to suppress the leakage of the lubricant from the roller circulation path and to prevent intrusion of dust and the like into the roller circulation path.

The present invention is not limited to the above embodiments, and various modes are possible. For example, in both of the above embodiments, the connecting portion of the retainer 40 is provided on both sides of the ring seat portion, but may be provided on only one side of each of the spacer portions (not shown). According to the configuration in which the connecting portion is provided only on one side of the spacer, the contact area of the retainer with the inner ring 10 or the outer ring 20 is reduced, and the rotational resistance is reduced.
Further, the amount of material of the retainer can be reduced, and the cost can be reduced. However, according to the configuration in which the connecting portion is provided on both sides of the spacer portion as in the above-described embodiments, the connecting strength of the spacer portion by the connecting portion is large, and the rigidity of the entire retainer is increased, and the skew of the roller is increased. Can be effectively regulated.

[0032]

As described above, according to the first aspect of the present invention, since the spacer provided in the retainer has a large contact area with the roller, the holding of the roller is stable and skew hardly occurs. In addition, since the spacers are connected to each other by the connecting portion, the clearance between the spacers and the rollers (the circumferential clearance) hardly changes, and some rollers cause skew due to the clearances. Not even. from these things,
All rollers roll stably, ensuring the load capacity,
The amount of wear is reduced. In addition, since the retainer is made of resin, the sound generated by the contact with the roller also has an extremely low level. Further, since the spacer is supported by the connecting portion and does not fall, it is not necessary to increase the thickness of the spacer in order to prevent the spacer from falling. Therefore, the thickness of the spacer, that is, the dimension between the rollers can be minimized, and the number of rollers can be increased to increase the load capacity. According to the second aspect, the space occupied by the retainer is formed without performing special processing such as a groove on the inner ring or the outer ring. Therefore, the rigidity of the inner and outer rings is ensured, and the cost reduction in machining is achieved. According to the third aspect, since the connecting portion of the retainer does not need to be accommodated between the inner ring and the outer ring, the gap between the inner and outer rings can be reduced to the utmost. Therefore, the leakage of the lubricant from the roller circulation path can be suppressed, and the intrusion of dust and the like into the roller circulation path can be prevented. According to the fourth aspect, the contact area of the retainer with the inner ring or the outer ring is reduced, and the rotational resistance is reduced. Further, the amount of material of the retainer can be reduced, and the cost can be reduced. According to the fifth invention, the connection strength of the spacer portion by the connection portion is large,
Further, the rigidity of the entire retainer increases, and the skew of the roller can be effectively controlled. According to the sixth aspect, durability is improved, and a lubricated state is maintained for a long time without replenishing a lubricant, so-called maintenance-free is achieved. According to the seventh aspect, the provision of the lubricant reservoir allows the once supplied / filled lubricant to be maintained for a long time, the lubrication state to be maintained for a long time, and contributes to maintenance-free operation. In this regard, in combination with the sixth aspect, the lubricating action is performed for an extremely long time even without the supply of the lubricant, thereby realizing maintenance-free operation. According to the eighth aspect, the bearing can be assembled using the inner and outer races that are not split in half in the radial direction. That is, for at least one of the inner and outer rings,
If the pair of ring members are combined, the bearing can be assembled, and no break occurs in the middle of the V-shaped groove, so that the roller can smoothly roll. According to the ninth aspect, the cross roller bearing according to the first aspect contributes to the effect achieved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a cross roller bearing according to a first embodiment of the present invention.

FIG. 2 is a plan view of the cross roller bearing shown in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

4A is a plan view of a retainer of the cross roller bearing, FIG. 4B is a cross-sectional view taken along line BB in FIG. 4A, and FIG. 4C is CC in FIG. 4A. FIG. 4D is a cross-sectional view taken along line DD in FIG. 4A.

FIG. 5 is an enlarged exploded perspective view showing a part of the retainer and a roller held by the retainer.

FIG. 6 is an enlarged sectional view of a main part showing a state in which a roller and a retainer are housed in the cross roller bearing.

FIG. 7 is an enlarged sectional view of the retainer.

FIG. 8 is a cross-sectional view of a cross roller bearing according to a second embodiment of the present invention.

FIG. 9 is an enlarged sectional view of a main part of the cross roller bearing.

10A is a plan view of a retainer of the cross roller bearing, FIG. 10B is a cross-sectional view taken along line BB in FIG. 10A, and FIG. 10C is CC in FIG. 10A. FIG. 10D is a cross-sectional view taken along a line D-D in FIG.

FIG. 11 is an enlarged exploded perspective view showing a part of the retainer and a roller held by the retainer.

[Explanation of symbols]

 Reference Signs List 10 inner ring 16 (inner ring) V-shaped groove 17 receiving groove 20 outer ring 26 (outer ring) V-shaped groove 27 receiving groove 30 roller 40, 40A retainer 41, 42 (retainer) spacer 43, 43 ', 43 "(retainer) connection part 50 track 55 gap

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yumi Fukada 1088 Hirabayashi, Nyuuji-cho, Matsusaka-shi, Mie Prefecture F-term in the Mie Plant of TEK Corporation (reference) 3J101 AA13 AA26 AA33 AA42 AA54 AA62 BA15 BA71 DA14 EA35 EA36 FA02 FA44 FA48

Claims (9)

[Claims] An inner ring having a V-shaped groove formed on the outer circumference and an outer ring having a V-shaped groove formed on the inner circumference are coaxially arranged so that a gap between the inner ring is formed. In a cross roller bearing in which a plurality of rollers are arranged and accommodated in the orbit by appropriately changing the directions of their rotating shafts, an annular resin retainer is accommodated in the orbit, and the retainer is adjacent to the orbit. A cross roller bearing, wherein a spacer portion interposed between matching rollers and a connecting portion connecting the spacer portions are integrally formed. 2. The connector according to claim 1, wherein the connecting portion extends in a central axis direction of the retainer and is accommodated in a gap formed between an outer peripheral surface of the inner race and an inner peripheral surface of the outer race. The cross roller bearing according to claim 1. 3. The connecting portion has a cross section V of the inner ring and the outer ring.
2. The cross roller bearing according to claim 1, wherein the cross roller bearing is housed in a housing groove formed at the bottom of the U-shaped groove. 4. The cross roller bearing according to claim 2, wherein said connecting portion is provided on one side of each of said spacer portions. 5. The cross roller bearing according to claim 2, wherein the connecting portions are disposed on both sides of each of the spacers. 6. The cross roller bearing according to claim 1, wherein the retainer holds a lubricant. 7. The cross roller bearing according to claim 1, wherein a lubricant reservoir is provided on the retainer. 8. At least one of the inner ring and the outer ring is formed by connecting a pair of ring members, and the retainer is cut at one location in a direction intersecting the circumferential direction,
The cross roller bearing according to any one of claims 1 to 7, wherein the diameter can be increased or decreased by its elasticity. 9. A retainer which is used for a cross roller bearing in which a plurality of rollers are arranged by appropriately changing the directions of rotating shafts, and which is formed in a ring shape by a resin in a retainer for holding the rollers in a state where they are equally spaced from each other. A retainer for a cross roller bearing, wherein a spacer portion arranged at intervals in a circumferential direction and a connecting portion connecting the spacer portions are integrally formed.