JP2001254724A - Rolling spherical bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling spherical bearing simplifying a bearing periphery by connecting various cords for supply and control of fluid through the inside of a bearing for a working means furnished on an oscillating member to be three-dimensionally guided. SOLUTION: An inner ring 2 of the rolling spherical bearing 1 is constituted of a convex spherical surface part 4 and connector parts 15, 15, and through- holes 18 formed on each of the connector parts 15 constitute a passage 20 by being communicated with each other through a hollow part 19 formed inside of the convex spherical surface part 4. An arm as an oscillating member to be connected to each of the connector parts 15 of the inner ring 2 is free to three-dimensionally oscillate by rolling of a rolling body 13 in relation to the outer ring 3 installed on a frame. Various kinds of the cords C for activating a working means provided on the arm are never exposed to outside by passing it through the inside of the passage 20 and never damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling spherical bearing having a number of rolling elements arranged on a spherical surface and applicable to precision instruments, robots, etc. in various fields such as measurement, processing, positioning and the like.

[0002]

2. Description of the Related Art In recent years, robotization has advanced in the fields of precision measurement and processing, and many items such as complicated operation, smooth operation, reduction in weight of element parts, and reduction in size have been required. In these fields, in order to realize smooth movement in spherical bearings, spherical bearings have been devised as multi-degree-of-freedom joints that can freely move in all three dimensions and six axes. In general, a type in which a sliding surface is formed on a spherical surface and which makes relative sliding contact with a mating member has been commercialized. On the other hand, as a multi-degree-of-freedom joint, a rolling spherical bearing in which an inelastic retainer or a ball held by an elastic retainer is a rolling element between a spherical inner ring and an outer ring has been proposed (Japanese Utility Model Application Laid-Open No. 57-57).
No. 182632).

Further, as a rolling spherical bearing, a precision measuring instrument which requires no play and high precision is required by fitting a rod tip and an outer peripheral member without any gap by applying a preload to the outer peripheral member via a number of rolling members. Bearings more suitable for precision machining machines, precision positioning mechanisms, etc. (Patent No. 26)
No. 14430). In this rolling spherical bearing,
The cage has a large number of through holes for holding the rolling elements.Each of the through holes has a smaller opening than the outer diameter of the rolling elements on the outer peripheral surface side of the cage, and the inner peripheral surface of the cage. On the side, the opening is slightly larger than the outer diameter of the rolling element. Inside the through holes on the outer peripheral surface side of the retainer, there is a slope portion freely contacting the rolling element. Each rolling element held in the through hole projects on both the outer peripheral surface side and the inner peripheral surface side of the cage, and sets the opening angle of the cage relative to the center of the rod tip spherical portion with respect to the center of the rod end spherical portion of the outer peripheral member. It is set to approximately twice the opening angle.

By the way, when the two rocking members are rocked relatively three-dimensionally by using a spherical bearing, one rocking member is simply three-dimensionally moved with respect to the other rocking member. It is usual to provide working means for performing some work in the course of the swinging operation or at a position after the swinging operation as well as performing the operation. For such work, for example,
There are processes such as pinching and cutting of articles by a chuck, welding, etc., and performing these operations requires power for operation and control for executing such operations in a predetermined manner. In the case of the chuck, for example, it is necessary to supply a fluid such as air for operating the actuator that drives the chuck to the actuator, and to supply the control signal for controlling the control valve or detect the sensor to operate the actuator. It is necessary to send a detection signal to the controller. Also,
In the case of welding, it is necessary to supply a current to the welding electrode and control the current.

[0005]

As described above, the fluid such as air is directly supplied to the working means provided on the swinging member which is relatively three-dimensionally guided by the spherical bearing, and the fluid is supplied. The connection of the pipe for supplying the electric current for processing and the cord for the control or its control (including detection)
Regardless of the spherical bearing, it is performed directly from the drive source or controller. These pipes and cords need to be arranged so as not to hinder the free movement of the swing member over the entire three-dimensional guide range of the swing member. Therefore, since these pipes and cords are arranged around the outside of the apparatus with a certain margin, the surroundings of the apparatus are not simplified, and there is a possibility that the exposed pipes and cords outside may be damaged. There is a problem that it also hinders maintenance work.

Therefore, a fluid such as air, a flexible pipe for supplying the fluid, and a current for machining are supplied to the working means provided on the swinging member three-dimensionally guided by the spherical bearing. Simplifies the area around the oscillating member that is relatively oscillated by the spherical bearings by connecting the cord to be controlled or the cord for controlling the oscillating member without obstructing the three-dimensional guidance of the oscillating member and without exposing it to the outside. There are issues that need to be resolved in terms of

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and a pipe or a cord connected to a working means provided on a swinging member guided three-dimensionally by a spherical bearing is provided. By allowing it to pass inside, it simplifies the area around the swinging member that is relatively swung by the spherical bearing, prevents piping and cords from being exposed to the outside, prevents damage, and does not hinder maintenance work etc. It is to provide a spherical bearing which can be used.

The present invention provides an inner ring having a convex spherical first raceway surface on the outer circumference, an outer race having a concave spherical second raceway surface on the inner circumference corresponding to the first raceway surface of the inner ring, and A rolling element disposed between the first raceway surface of the inner race and the second raceway surface of the outer race, and capable of rolling on the raceways;
The inner ring includes a convex spherical surface portion having the first raceway surface formed on the outer periphery and a hollow portion formed therein, and connector portions provided on the convex spherical surface portion on both sides of the outer ring. In order to allow pipes and cords to be arranged through the inside of the inner ring and the outer ring, through holes are formed in the hollow portion of the convex spherical portion and communicate with each other through the hollow portion. And a rolling spherical bearing comprising:

According to the thus configured rolling spherical bearing, the inner race and the outer race are disposed between the convex spherical first raceway surface of the inner race and the concave spherical second raceway surface of the outer race. By rolling the rolling element on the raceway surface, the rolling element can swing relatively three-dimensionally. The pipes and cords are provided in such a manner as to extend from a through hole formed in one connector portion of the inner ring to a through hole formed in the other connector portion of the inner ring through a hollow portion formed in the convex spherical portion. Is done. The pipes and cords are connected from one connector to devices such as a supply source and a controller through one swinging member connected to the connector, and are connected to the connector from the other connector. The other swinging member is connected to devices such as actuators, sensors, valves, and electrodes provided in the working means. In addition, since a convex spherical surface part and a connector part are sealed from the outside in the inner ring, it is also possible to flow a fluid directly into the inner ring.

Further, according to the present invention, there is provided a semiconductor device comprising:
An inner race having a raceway surface, an outer race having a concave spherical second raceway surface on an inner periphery corresponding to the first raceway surface of the inner race, and the first raceway surface of the inner race and the second raceway of the outer race And a rolling element disposed between the inner race and the inner race, wherein the inner race has a convex spherical surface portion in which the first raceway surface is formed on the outer periphery and a hollow portion is formed inside. A connector portion provided on the convex spherical surface portion on one side of the outer ring, wherein the outer ring has the second raceway surface formed on an inner periphery thereof, and a housing hollow portion capable of housing the inner ring is formed. The connector has a first through hole that opens into the hollow portion of the convex spherical portion so that piping and cords can be provided through the inside of the inner ring and the outer ring. Formed in the concave spherical portion, and open to the accommodation hollow portion of the concave spherical portion; Serial about housing hollow part and the rolling spherical bearing consists of a second through hole communicating with the first through hole is formed through said hollow portion.

According to the thus configured rolling spherical bearing, the inner race and the outer race are disposed between the first spherical raceway surface of the inner race and the concave spherical second raceway surface of the outer race. By rolling the rolling element on the raceway surface, the rolling element can swing relatively three-dimensionally. The piping and cords pass through the first through hole formed in the connector part of the inner ring, through the hollow part formed in the convex spherical part of the inner ring and the accommodation hollow part formed in the concave spherical part of the outer ring. Are provided in a manner extending to the second through hole formed in the second through hole. Pipes and cords are connected to the connector of the inner ring, through one of the swinging members connected to the connector, through a device such as a supply source or a controller, or an actuator, a sensor, Connected to devices such as valves and electrodes. If the space between the convex spherical surface of the inner race and the concave spherical surface of the outer race is sealed from the outside, it is also possible to flow the fluid directly between the two connector parts.

In each of the above rolling spherical bearings, the inner ring and the outer ring are formed to be thin. By forming the inner and outer rings to be thin, the rolling spherical bearing can be made lightweight and can be easily manufactured by molding from a pipe material.

In each of the above rolling spherical bearings, one of the rocking members is attached to at least one of the two connector portions of the inner race in order to connect the two rockable rocking members so as to be relatively rockable. By attaching the other of the swing members to the outer ring, or by attaching one of the swing members to the connector portion formed on the inner ring, the other of the swing members is formed on the outer ring. By being attached to the attachment portion, the structure is applied between the swing members. The attachment portion of the outer ring is configured by one of a flange portion extending from the concave spherical portion of the outer ring and a connector portion provided in the concave spherical portion and having the second through hole formed therein. ing.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rolling spherical bearing according to the present invention will be described below with reference to the accompanying drawings. FIG.
1 shows an embodiment of a rolling spherical bearing according to the present invention, and is a cross-sectional view taken along the line AOA of FIG. 2, FIG. 2 is a side view of the rolling spherical bearing shown in FIG. 1, and FIG. It is a top view of a spherical bearing.

Referring to FIGS. 1 to 3, a rolling spherical bearing 1 includes an inner ring 2 and an outer ring 3 arranged on the outer peripheral side of the inner ring 2, and the inner ring 2 has a first raceway surface on its outer periphery. And a convex spherical portion 4 on which a convex spherical raceway surface 5 is formed. The outer ring 3 is configured by connecting left and right outer ring halves 3a and 3b. Each of the outer ring halves 3a, 3b has a concave spherical raceway surface 7a, 7b as a second raceway surface (corresponding to the convex spherical surface portion 4 of the inner race 2). 7) are formed, and the flange portions 8a are formed integrally with the concave spherical portions 6a, 6b and extend to the outer peripheral side in the shape of a cross section, and are arranged to face each other. , 8b. Screw holes 9 are formed in the flange portions 8a and 8b so as to be spaced apart in the circumferential direction and penetrate in alignment with each other. The outer ring halves 3a and 3b are joined by screwing the fixing screws 10 into the screw holes 9. Is done.

A rolling element assembly 12 is disposed between the raceway surface 5 of the inner race 2 and the raceway surface 7 of the outer race 3. The rolling element assembly 12 includes a retainer 14 and a rolling element 13 (only a part of which is denoted by a reference numeral) which is rotatably held by the retainer 14 and includes a number of balls rolling on the raceway surfaces 5 and 7. It is composed of Therefore, the outer ring 3 has the convex spherical portion 4 of the inner ring 2 via the plurality of rolling elements 13 between the raceway surfaces 5 and 7. The retainer 14 is formed of a thin-walled spherical shell inserted between the raceway surfaces 5 and 7, and here, the spherical shell is
Divided piece 14 divided into four in the circumferential direction by a dividing surface extending in the axial direction
a to 14d (FIG. 2). The retainer 14 rotatably supports a rolling element 13 that rolls and guides the raceway surfaces 5 and 7 around the entire circumference.

The axial width of the outer ring 3 is, as shown in FIG.
The inner race 2 has a swing angle θ (35 ° in this case) with respect to the inner race 2. The convex spherical raceway surface 5 of the inner race 2 swings from the neutral position shown in FIG. In order to secure the track, the outer ring 3 is formed to extend to the swing angle θ on both sides of the concave spherical track surface 7. The outer ring 3a and the outer ring 3b are obtained by dividing the width of the outer ring into two by a plane passing through the center O of the convex spherical portion 4. Here, the outer ring 3a and the outer ring 3b are formed to have a thin cross-sectional thickness for weight reduction. An attachment hole 11 for attaching to a mating member (one of the relative swing members) such as a frame (not shown) is formed in the coupled flange portions 8a and 8b. In this example, the mounting holes 11 are formed in screw holes that are circumferentially spaced and aligned with each other and pass through. In addition, the flange 8b of the outer ring 3b is fixed in a state of being fitted and positioned in the spigot of the flange 8a of the outer ring 3a.
a and the outer ring 3b form a raceway surface 7 which is flush with the inner peripheral surface. Further, since the cage 14 swings (angle θ / 2) by half with respect to the swing (angle θ) of the inner ring 2 or the outer ring 3, the width of the cage 14 is changed from the width of the outer ring 2 to both ends. It has a width of θ / 2 business trips and covers the entire movable range.

The inner ring 2 includes connector portions 15 and 15 extending from the convex spherical portion 4 to both ends, and having pipe screws 16 and 16 on the outer periphery to which a mating member can be attached. In this embodiment, the connector portions 15, 15 are formed with pipe threads 16, 16, but may be a pipe joint having a concave (convex) shape. In this embodiment, the connector portions 15 and 15 are formed at positions facing each other in the diametrical direction of the convex spherical portion 4 of the inner race 2. The swing members that swing relative to each other are screw-connected to pipe screws 16, 16 of the connector portions 15, 15, respectively.

The inside of the convex spherical portion 4 of the inner ring 2 is
The connector portions 15, 15 are formed with through holes 18, 18 that penetrate in the axial direction and open to the hollow portion 19 and communicate with each other through the hollow portion 19. Therefore, in this embodiment, the two through holes 1
The passages 8 and 18 constitute a single passage 20 that is sealed to the outside via the hollow portion 19. Connector part 15,
15 is formed in the process of forming the inner ring 2 using a pipe material. As a result, the inner ring 2 is formed such that the convex spherical surface portion 4 and the connector portions 15 and 15 are integrally formed to have a thin cross-sectional thickness, so that the weight can be reduced. The inner ring 2 may be made of a metal tube, but may be made of sintered or ceramic.

As an example of use of this embodiment, a frame (not shown), which is one of the rocking members for relatively rocking the outer ring 3.
And an arm (not shown), which is the other swinging member that relatively swings, is connected to the connector portions 15 and 15 of the inner race 2 so that the arm is three-dimensionally movable with respect to the frame. Examples can be given. Code C for transmitting a control signal to a working means such as a chuck unit disposed at the tip of the arm for gripping an article
(Refer to FIG. 1, sensor cord, control cord, power cord, etc.) and pipes may be damaged if exposed to the outside. , 18 and the hollow portion 19, the cord C can be inserted into the inside of the arm, and as a result, the cord C can be protected from damage and can have a compact configuration.

Next, another embodiment of the rolling spherical bearing according to the present invention will be described with reference to FIGS. 4 shows another embodiment of the rolling spherical bearing according to the present invention, and is a cross-sectional view taken along a plane indicated by BOB in FIG. 5, and FIG. 5 is a side view and a view of the rolling spherical bearing shown in FIG. 6 is a plan view of the rolling spherical bearing shown in FIG.

The rolling spherical bearing 21 shown in FIGS.
Compared to the rolling spherical bearing 1 shown in FIGS. 1 to 3, the present embodiment has a structure in which one connector portion is provided on the outer ring instead of the inner ring. As shown in FIG. 4, the rolling spherical bearing 21 includes an inner ring 22 and an outer ring 23 arranged on the outer peripheral side of the inner ring 22. The inner ring 22 includes a convex spherical portion 24 having a convex spherical raceway surface 25 as a first raceway surface formed on the outer periphery. The inner ring 22 is formed to have a generally thin cross section, and a hollow portion 41 is formed inside the convex spherical portion 24.

The outer ring 23 is formed by joining a small split ring 23a and a large split ring 23b divided by a plane passing through the center O of the convex spherical portion 24 of the inner ring 22 (a plane perpendicular to the axial direction). ing. Each of the divided ring bodies 23a, 23b has a concave spherical surface 27a, 27b as a second race surface on the inner periphery corresponding to the convex spherical portion 24 of the inner ring 22 (the reference numeral 27 is used when collectively referred to). Concave spherical part 2 on which is formed
6a and 26b (the reference numeral 26 is used when collectively referred to)
Flanges 28a and 28b are provided integrally with each other and extend from the concave spherical portions 26a and 26b to the outer peripheral side in a U-shape in cross section, and are arranged to face each other. Flange part 28
a and 28b face each other on the plane side passing through the center O when the divided ring bodies 23a and 23b are combined. Screw holes 29 are formed in the flange portions 28a and 28b so as to be circumferentially spaced and aligned with each other, and the fixing screws 30 are screwed into the screw holes 29 to connect the flange portions 28a and 28b to each other. By doing so, small divided wheel 2
3a and the large divided wheel body 23b are connected. Each of the divided ring bodies 23a and 23b of the outer ring 23 is formed to have a thin section.
A part of the inner ring 22 is accommodated in the large split
An accommodation hollow portion 42 connected to the hollow portion 41 is formed.

A rolling element assembly 32 is provided between the raceway surface 25 of the inner race 22 and the raceway surface 27 of the outer race 23.
The rolling element assembly 32 is similar to the rolling element assembly 12 in the rolling spherical bearing 1 shown as the previous embodiment, and has the same structure as the cage 3.
4 and a rolling element 33 (only a part of which is denoted by a reference numeral) which is rotatably held by a retainer 34 and comprises a number of balls which roll on the raceway surfaces 25 and 27.
Therefore, the concave spherical portion 26 of the outer ring 23 is
The convex spherical portion 24 of the inner race 22 via a plurality of rolling elements 33 therebetween
Is holding on. The retainer 34 is formed of a thin spherical shell inserted between the raceway surfaces 25 and 27. In this example, the retainer 34 is a divided surface extending in the axial direction and has a circumferential surface of 4 mm.
It is configured by uniting the divided pieces 34a to 34d. The retainer 34 rotatably supports a rolling element 33 that rolls and guides the raceway surfaces 25 and 27 around the entire circumference.

As shown in FIG. 4, the axial width of the outer ring 23 is such that the swing angle θ (35 ° in this case) with respect to the inner ring 22 can be secured. That is, the raceway surface 27b of the concave spherical surface of the large split wheel body 23b can secure the track even if the inner ring 22 swings at the swing angle θ from the neutral position shown in FIG. As described above, the inner race 22 is formed so as to extend from the convex spherical raceway surface 25 to the swing angle θ (on the left side in FIG. 4), and the convex spherical raceway surface 25 of the inner race 22 is also formed as shown in FIG.
Is formed so as to be wider than the concave spherical track surface 27 of the outer race 23 up to the swing angle θ (on the right side in FIG. 4) so that the track can be secured even when swinging at the swing angle θ from the neutral position shown in FIG. ing.
Mounting holes 31 for mounting to mating members such as frames (not shown) in the coupled flange portions 28a and 28b.
(Screw holes that are circumferentially spaced and aligned with each other and penetrate) are formed alternately with the screw holes 29. Note that the flange 28b of the large split wheel body 23b is fixed in a state of being fitted and positioned in the spigot of the flange 28a of the small split wheel body 23a, and the small split wheel body 23a and the large split wheel body 23b are formed on the inner peripheral surface. A track surface 27 which is flush with the surface is formed. In this embodiment, the small divided wheel body 23a, the large divided wheel body 23b, and the flanges 28a, 28b are formed to have a thin section in thickness for weight reduction. Further, since the retainer 34 has a half swing angle (θ / 2) with respect to the swing angle θ of the inner ring 22 or the outer ring 23, the width of the retainer 34 is small at one end side of the small divided ring body 23.
a / 2 projecting from the end face of a, and the other end is approximately track surface 2
The width is about .theta. / 4 from the end face of the inner ring 22, as shown between 5, 27, and covers the movable range.

The inner race 22 has a connector portion 35 extending integrally from the outer race 23 to the outside on one end side from the convex spherical surface portion 24 and having a pipe screw 36 formed on the outer periphery. A through hole 39 is formed in the connector portion 35 as a first through hole that opens into the hollow portion 41. A mating member, which is one of the swinging members that relatively swings, can be screwed into and attached to the pipe screw 36 of the connector portion 35. Although the pipe thread 36 is formed in the connector portion 35, a concave (convex) pipe joint may be used for attaching the mating member.

The large split wheel body 23b of the outer ring 23 is
On the side facing the connector portion 35, there is provided a connector portion 37 integrally extending to the outside and having a pipe screw 38 formed on the outer periphery. A through hole 40 is formed in the connector portion 37 as a second through hole that opens into the housing hollow portion 42. Regarding the connector portion 37 of the outer ring 23, the pipe screw 3
Instead of 8, a concave (convex) pipe joint may be used. From the connector portion 35 of the inner ring 22 to the connector portion 37 of the outer ring 23,
Even if relative swing occurs between the inner ring 22 and the outer ring 23 of the rolling spherical bearing 21 within the range of the swing angle θ, the through hole 3 of the inner ring 22
9 through the hollow portion 41 and the housing hollow portion 42
A passage 43 reaching the through hole 40 is formed. Inner ring 2
Since the section 2 and the outer ring 23 can be formed into a thin section by molding a pipe material, the weight of the rolling spherical bearing 21 can be reduced. The inner ring 22 and the outer ring 23 may be made of a metal tube, or may be made of a sintered material, ceramic, or the like.

With the above-described structure, as an example of use, an arm (not shown), which is one swinging member, which is relatively swinging, is connected to the connector portion 35 of the inner race 22, and the other swinging member is used. As a member, another arm is fixed to the connector portion 37 of the outer ring 23 or a frame (not shown) is fixed to the flange portions 28a and 28b, so that both arms or the arm can be moved three-dimensionally with respect to the frame. Can be attached. For the code C (sensor code, control code, power cord, etc.) for transmitting control signals to working means such as a chuck unit provided at the tip of the arm for gripping the article, and flexible piping, If the cord C is exposed to the outside, the cord C may be damaged. However, these cords C are passed through the passage 43 including the through hole 39 of the inner race 22, the hollow portion 41, the accommodation hollow portion 42, and the through hole 40 of the outer race 23. The cord C can be inserted inside, and as a result, the cord C can be protected from damage and a compact configuration can be achieved. Even if the inner race 22 swings from the position shown in FIG.
Is secured, so that the spherical bearing 2 can be used for rolling pipes and cords C.
1 can be inserted. In addition, if an appropriate seal is provided between the inner ring 22 and the outer ring 23, the fluid flows directly between the connector portion 35 of the inner ring 22 and the connector portion 37 of the outer ring 23 through the hollow portion 41 and the housing hollow portion 42. You can also.

In this case, the connector portion 37 of the outer race 23 is
Mounting hole 31 to which a swinging counterpart member can be mounted
If is provided on the flange portions 28a and 28b, it is not always necessary to provide them. Further, the retainers 14 and 34 for rotatably holding the rolling elements 13 and 33 are not necessarily required. By forming a retainer portion by bending a part of the inner ring and the outer ring, the rolling elements 13 and 33 are held densely in a region separated by the retainer portion, and the rolling elements 13 and 33 are spilled to both the inner ring side and the outer ring side. It can also be held so that there is no.

[0030]

Since the present invention is configured as described above, it has the following effects. That is, the rolling spherical bearing according to the present invention includes a convex spherical portion formed of each convex spherical surface, and extends to at least one end of the convex spherical portion, and is a mating member of a rocking member that can rock with each other. Is formed, a convex spherical surface portion, an inner ring having a through hole through which a wiring cord or a fluid can pass at an axial center portion passing through the connector portion, and the spherical surface on an inner peripheral surface. An outer ring having a mounting hole or a connector portion on which a raceway surface formed of a concave spherical surface corresponding to the portion is formed and the other counterpart member of the swingable swing member can be mounted on the outer peripheral portion, and , A plurality of balls as rolling elements are rolling. Since two through holes communicating with each other are formed in the inner ring, or a through hole communicating with the through hole on the inner ring side is formed in the outer ring, wiring cords, gas or liquid fluids, etc. are provided through the through holes. The wiring and piping around the rolling spherical bearing can be simplified, and the piping and cords can be prevented from being damaged. Therefore, a complicated operation and a smooth operation of the oscillating member are enabled, and by forming the oscillating member thin, the weight of the element parts can be reduced, and the apparatus can be made compact.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment of a rolling spherical bearing according to the present invention, taken along line AOA in FIG. 2;

FIG. 2 is a side view of the rolling spherical bearing shown in FIG.

FIG. 3 is a plan view of the rolling spherical bearing shown in FIG. 1;

FIG. 4 is a cross-sectional view of another embodiment of the rolling spherical bearing according to the present invention, taken along a plane indicated by BOB in FIG. 5;

FIG. 5 is a side view of the rolling spherical bearing shown in FIG. 4;

FIG. 6 is a plan view of the rolling spherical bearing shown in FIG. 4;

[Explanation of symbols]

 1,21 Rolling spherical bearing 2,22 Inner ring 3,23 Outer ring 4,24 Convex spherical part 5,25 First raceway surface 6,26 Concave spherical surface part 7,27 Second raceway surface 13,33 Rolling element 15 Connector part 18 through Hole 19, 41 Hollow portion 20, 43 Passage 35 Connector portion (inner ring side) 37 Connector portion (outer ring side) 39 Through hole (first through hole) 40 Through hole (second through hole) 42 Housing hollow portion C code

Claims (7)

[Claims] 1. An inner ring having a first raceway surface having a convex spherical surface on an outer periphery, an outer ring having a second raceway surface having a concave spherical surface on an inner circumference corresponding to the first raceway surface of the inner ring, and The first
A rolling element disposed between a raceway surface and the second raceway surface of the outer ring, the rolling element being capable of rolling on the raceway surfaces; the inner race includes the first raceway surface formed on the outer circumference, and A convex spherical portion having a hollow portion formed therein; and a connector portion provided on the convex spherical portion on both sides of the outer ring. Pipes and cords are provided in the two connector portions through the inside of the inner ring and the outer ring. A rolling spherical bearing comprising: a through hole that opens into the hollow portion of the convex spherical portion and communicates with each other through the hollow portion so that the convex spherical portion can be provided. 2. The rolling spherical bearing according to claim 1, wherein the inner ring and the outer ring are formed to be thin. 3. In order to connect the two rocking members so as to be relatively rockable with each other, one of the rocking members is attached to at least one of the two connector portions of the inner ring, and the other of the rocking members is connected to the outer ring. The rolling spherical bearing according to claim 1, wherein the rolling spherical bearing is applied between the oscillating members by being attached to the rolling member. 4. An inner ring having a convex spherical first raceway surface on an outer periphery, an outer ring having a concave spherical second raceway surface on an inner circumference corresponding to the first raceway surface of the inner ring, and The first
A rolling element disposed between a raceway surface and the second raceway surface of the outer ring, the rolling element being capable of rolling on the raceway surfaces; the inner race includes the first raceway surface formed on the outer circumference, and A convex spherical portion having a hollow portion formed therein and a connector portion provided on the convex spherical portion on one side of the outer ring, wherein the outer ring has the second raceway surface formed on an inner periphery thereof and the inner ring has A concave spherical surface portion formed with a housing hollow portion capable of accommodating a pipe and a cord through the inside of the inner ring and the outer ring, so that the connector portion has the convex spherical portion. A first through-hole opening in the hollow portion is formed, and the concave spherical portion is open to the housing hollow portion of the concave spherical portion and communicates with the first through hole through the housing hollow portion and the hollow portion. A rolling spherical bearing comprising a second through hole. 5. The rolling spherical bearing according to claim 4, wherein said inner ring and said outer ring are formed to be thin. 6. In order to connect two relatively swingable swinging members to each other so as to be relatively swingable, one of the swinging members is attached to the connector portion formed on the inner race, and the swinging member is provided. The rolling spherical bearing according to claim 4, wherein the other is attached to the attachment portion formed on the outer ring, so that the other is applied between the swinging members. 7. The mounting portion of the outer ring may be a flange portion extending from the concave spherical portion of the outer ring, or a connector portion provided in the concave spherical portion and having the second through hole formed therein. 7. The rolling spherical bearing according to claim 6, wherein the rolling spherical bearing is constituted by one of the above.