JP3529131B2 - Bearing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing device which is easy to mold, easy to manufacture and low in manufacturing cost.

[0002]

2. Description of the Related Art Conventionally, various bearings have been commercialized. An example of the bearing is, for example, a retainer mounted on the outer periphery of the guide shaft so as to be relatively movable, and a cylindrical outer cylinder that supports the retainer from the outer periphery, and the retainer has a large number of rolling elements. A holding hole is formed to incorporate rolling elements (steel balls, cylindrical rollers).

[0003]

However, the rolling element holding hole in the cage is formed on the integral cage, machined according to the size and shape of the rolling element, and the rolling element is fixed by caulking or the like. Since the process of holding the rolling element in the hole is adopted, it takes time to process. The present invention has been proposed from such a background, and is a bearing device that is easy to mold, is easy to manufacture, and can suppress the manufacturing cost.
The purpose is to provide storage .

[0004]

In order to solve the above-mentioned problems, according to the present invention, in claim 1, an outer cylinder is moved relatively to a guide shaft via a cage incorporating a large number of roller members. Mounted so that the roller member is
During portion has a shape swelled, said cage moving direction
It is composed of multiple pieces divided in the axial direction parallel to the
It is to form a segmentation hole, the center line the mating surface
And a holding hole for rotatably holding the roller member
The direction of the piece's right place, perpendicular to the piece's longitudinal direction
Engagement groove is formed in the
Affixing by means of a fixing means and wire in the engaging groove.
Wrap a strip of material to connect multiple pieces together to create a circle
Bearing device configured to be assembled as a cylindrical retainer
To propose . In the present invention, in claim 2, via a retainer incorporating a number of roller members, it was mounted relatively movably the outer cylinder to the guide shaft, the roller unit
The material has a shape in which the middle portion is bulged, and the cage is
It is composed of a plurality of pieces divided in an axial direction parallel to the moving direction, and one of the plurality of pieces is a pair of pieces.
As a set, form separate holes on the mating surfaces of the pieces.
The roller member with the mating surface as the center line.
A holding hole for rotatably holding the
Adjacent to each other by forming an engagement groove in the direction orthogonal to the longitudinal direction
The mating surfaces of the pieces are fixed to each other by fixing means.
At the same time, wrap a linear member around the engaging groove to
The cages are connected to each other and assembled as a cylindrical cage.
We propose a bearing device with a structure . Further, in the present invention, in claim 3, a large number of roller members are incorporated.
The outer cylinder can be moved relative to the guide shaft via the cage.
The roller member is mounted and has a bulged middle part.
The retainer has a shape and is formed by stacking a plurality of ring-shaped pieces into a cylindrical shape.
By forming a split hole on each mating surface,
Rotatably holding the roller member with the surface as the center line
As a holding hole, and the pieces are fixed to each other by fixing means.
Put on and put the pieces together
Holding by inserting the connecting means in the direction orthogonal to the bearing surface
We propose a bearing device that is integrated as a container .
It Moreover, in this invention, in Claim 4, said piece
Is a combination of the divided holes that make up the holding holes at regular intervals.
The split face with the mating face and the face facing the mating face as the joining faces
As a unit, the connecting surface of these divided pieces
A bearing device that is configured by integrally combining with each other
Suggest In the present invention, in claim 5, wherein the binding
The joining means engraves a groove in the longitudinal direction on the outer surface of the piece.
Along with this groove, fit the pieces between the pieces on both ends.
By the connecting rod that is inserted in the direction orthogonal to the bearing surface,
We propose a bearing device configured as follows . Further, in the present invention, in claim 6, the coupling means is a piece,
Insert a through hole in the axial direction and use this through hole.
Perpendicular to the mating surface of the piece between the pieces on both ends
Bearing composed of connecting rods inserted in the direction
Suggest a device . According to the present invention, in claim 7,
The fixing means bonds the mating surfaces of the pieces together by adhesion.
Therefore, we propose a bearing device that is fixed . Further, in the present invention, in claim 8, the fixing means is
A bearing device is proposed in which the pieces are fixed to each other by fusion .

According to the first aspect, the roller member is held.
The holding hole is designed for each piece to keep the shape of the roller member.
Divide the holding hole with the mating surface of adjacent pieces as the center line
Since it may be processed as a hole, it is easy to process . Na
The cage is an appropriate fixing means for the mating surfaces of the pieces.
And then formed on the top and bottom of the piece and in the middle.
The linear member is wound around the engaging groove to reinforce and assemble.
You can

According to claim 2, a set of pieces is held.
Place the split holes that make up the holes so that they face each other, and
Hold the roller member in the dividing hole and
The mating surfaces are integrated by the fixing means. Each integrated group
The pieces of the
Reinforce by winding a linear member through the engagement groove in the
Therefore, the assembly process of the cage can be completed .

According to claim 3, on the mating surface between the pieces
With the roller member arranged in the formed holding hole,
Several pieces are laminated and integrated into a cylindrical shape by a connecting means.
By doing so, the cage can be formed. The holding hole
Are holding holes on the mating surface of the piece at specified intervals.
It is only necessary to machine the split holes that make up the
It is easier than the working process.

According to the fourth aspect, the division which constitutes the holding hole
Mating surface with holes formed at regular intervals and facing the mating surface
As a unit, a split piece with the surface to be joined as a connecting surface,
Integrate the connecting surfaces of these divided pieces into one piece
If it is formed, only one molding die is required .

According to claim 5, the mating surface between the pieces is
With the roller member arranged in the formed holding hole,
A number of pieces are stacked and both ends are aligned along the groove on the outer surface of the piece.
It is possible to assemble the cage by inserting the connecting rod between the pieces.
it can.

According to claim 6, on the mating surface between the pieces
With the roller member arranged in the formed holding hole,
Stack a number of pieces, and insert both pieces through the insertion holes on the mating surface.
Assemble the cage by inserting the connecting rod between the end pieces.
You can

According to claim 7, the pieces are adhered to each other by adhesion.
Can be fixed and the cage can be easily assembled.
It

According to claim 8, the pieces are fused together.
Can be fixed and the cage can be easily assembled.
It

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the bearing according to the present invention.
One embodiment of the device is shown and described with reference to the accompanying drawings. Figure 1 shows a bearing arrangement 1, the bearing device 1 includes a retainer 3 that is fitted mounting the outer tube 2 of cylindrical shape to the outer tube 2 an inner wall, a number of rolling elements in the cage 3 4 (Hereinafter, the roller member 4) is incorporated so as to be relatively movable around the outer periphery of the guide shaft 5. In this case, the roller member 4 has a shape in which the intermediate portion is swollen. A plurality of splines (not shown) can be formed in the longitudinal direction of the outer peripheral surface of the guide shaft 5 in order to improve the followability with the guide shaft 5 via the roller member 4.

The cage 3 is a thin-walled cylindrical body composed of a plurality of axially divided pieces 6, and has an inner diameter larger than the outer diameter of the guide shaft 5 and an outer diameter of the outer cylinder 2. It is smaller than the inner diameter. The piece 6 is made of a known engineering plastic. Further, in the piece 6, among the holding holes 7 corresponding to the shape of the roller member 4 and having the mating surface P of the adjacent pieces 6 as the center line, the division holes 7s are arranged in rows (FIG. 2). reference). In this case, the division holes 7s on both mating surfaces P of the respective pieces 6 are arranged in a row in a state of being displaced in the longitudinal direction of the pieces 6. The piece 6 has a smaller thickness than the diameter of the roller member 4, and is held so that the roller member 4 is exposed on both the side facing the guide shaft 5 and the side facing the outer cylinder 2. is doing.

The holding hole 7 has its longitudinal direction in the outer peripheral direction of the cage 3, that is, in the direction orthogonal to the mating surface P of the piece 6. Further, the holding hole 7 is formed so as to hold the roller member 4 in a rotatable state from the inner and outer diameter sides of the piece 6 in the holding hole 7. The holding hole 7
Can be formed such that the inner diameter side of the piece 6 is slightly larger than the outer shape of the roller member 4 and the outer diameter side thereof is smaller than the outer shape of the roller member 4, depending on the purpose. The outer diameter side can be formed large.

In order to assemble the retainer 3 into a cylindrical shape by a plurality of pieces 6, the mating surfaces P of the pieces 6 are adhered to each other with an appropriate adhesive, and then the pieces 6 are attached to the upper and lower sides of the piece 6 and the middle portion. By forming the engagement groove 8 in the direction orthogonal to the longitudinal direction, that is, in the outer peripheral direction of the cage 3,
A linear member 9 is wound around these engaging grooves 8 to reinforce them (see FIGS. 3 and 4). Since the plurality of pieces 6 are assembled into a cylindrical shape, the mating surfaces P may be fixed to each other by heat fusion depending on the engineering plastic used for the pieces 6.

According to the retainer 3 in the bearing device 1 as described above, the retainer 3 adheres the mating surfaces P of the pieces 6 to each other with an appropriate adhesive, and then the upper and lower sides of the piece 6 and the intermediate portion thereof. The engaging groove 8 is formed in a direction orthogonal to the longitudinal direction of the piece 6, that is, in the outer peripheral direction of the cage 3,
A linear member 9 can be wound around these engaging grooves 8 to reinforce them. At this time, the holding hole 7 for holding the roller member 4
Since it suffices to machine the dividing hole 7s for each piece 6,
The holding hole 7 with the mating surface P of the adjacent pieces 6 as the center line can be easily processed, and the holding hole is integrally formed and caulked to hold the roller member 4 as before. This is easier than the above process and the manufacturing cost can be suppressed.

During operation of the device , in the bearing device 1, the holding holes 7 provided in the cage 3 are set so that the adjacent holding holes 7 are displaced in the axial direction of the cage 3 by a certain rule, so that the guides are guided. When the cage 3 moves relative to the shaft 5, the roller member 4 of the cage 3 is attached to the outer periphery of the guide shaft 5.
The impact at the time of contact can be averaged to be softened, and by suppressing the microvibration, the durability of the contact portion such as the roller member 4 can be improved.

Further, the cage 3 in the bearing device 1 according to the present invention can be constructed as follows. That is, as shown in FIG. 5, the retainer 3 is composed of a plurality of axially divided pieces 6, and two adjacent pieces 6 of the pieces 6 form a set, and the mating surface P of the piece 6 is formed. The holding holes 7 of the roller member 4 are lined up with the center line as the center line (see FIGS. 6 and 7). It should be noted that the holding holes 7 arranged in rows in the two pairs of pieces 6 adjacent to each other.
Are formed so as to be deviated by a constant distance in the three axial directions of the cage.

In the pair of pieces 6 and 6, split holes 7s, which form holding holes 7 for holding the roller member 4, are formed on the end faces of the pieces 6 and 6 facing each other on the longitudinal sides.
7s are arranged in a row so as to face each other. The piece 6 is
Can be configured by appropriate engineering,
The mating surface P in which the divided holes 7s of the holding hole 7 are formed is integrated with an adhesive, and the joining surface C facing the mating surface P is joined with the adjacent piece 6 by the adhesive. The piece 6 is provided with engagement grooves 8 in the direction perpendicular to the longitudinal direction of the piece 6, that is, in the outer peripheral direction of the cage 3, in the upper, lower, and middle portions of the piece 6. Depending on the material of the piece 6, it may be integrated with the adjacent piece 6 by heat fusion.

Next, a process of assembling the cage 3 as described above will be described. First, a set of pieces 6 and 6 is arranged so that the division holes 7s and 7s forming the holding hole 7 face each other, and the roller member 4 is held in one of the division holes 7s and the pieces 6 and 6 are The mating surfaces P are bonded together by an appropriate adhesive to be integrated (see FIG. 7). Next, when arranging and assembling the integrated pieces 6 and 6, the pieces 6 and 6 in which the forming positions of the holding holes 7 are axially displaced are adjacent to the holding holes 7 in the set of pieces 6 and 6. (See FIG. 8). In such an arrangement manner, the pieces 6 and 6 of each set are joined by an adhesive through the joining surface C (see FIG. 9), and the upper and lower sides of the piece 6 and the engaging groove 8 in the middle portion. The linear member 9 can be wound and reinforced (see FIG. 10) to complete the assembly process of the cage 3.

As described above, in the retainer 3, one set of pieces 6 is combined and the mating surface P of the pieces 6 is combined.
To form the holding hole 7 whose center line is
Since it is only necessary to process s and 7s, it is possible to further rationalize the manufacturing process and ensure the assembly accuracy.

Further, the retainer 3 in the bearing device 1 according to the present invention can be configured as follows. In the bearing device 1 shown in FIGS. 11 and 12, the cage 3 is configured by laminating a plurality of ring-shaped pieces 6, and the inner diameter is made larger than the outer diameter of the guide shaft 5 and Is smaller than the inner diameter of the outer cylinder 2. These pieces 6 are provided with dividing holes 7s that form holding holes 7 corresponding to the shape of the roller member 4 at predetermined intervals on the mating surface between the pieces 6 (see FIG. 13). The piece 6 may be further subdivided and molded as shown by the chain line. A groove 10 is formed on the outer surface of the piece 6 in the longitudinal axis direction, and the piece 6 is fitted between the pieces 6 at both ends along the groove 10 to serve as a connecting means for integrally forming a cage. A connecting rod 11 is provided. this
In this case, the connecting rod 11 is orthogonal to the mating surface of the piece 6.
It is a setting that is inserted in the direction. Also, the piece 6 is
The wall thickness is smaller than the diameter of the roller member 4, and the roller member 4 is held so as to be exposed on both the side facing the guide shaft 5 side and the side facing the outer cylinder 2. It should be noted that the holding holes 7 can be formed with divided holes 7s in each piece 6 so that the holding holes 7 adjacent to each other are displaced in the axial direction of the cage 3.

The groove 10 on the outer surface of the piece 6 has the width dimension of the connecting rod 11 and has a wide bottom cross section so as to hold the connecting rod 11 inside the piece 6 (see FIG. 14). . The connecting rod 11 has a pair of locking pieces 11f, 11f at both ends so that it can be locked in the step holes 6h in the end pieces 6E located at both longitudinal ends of the retainer 3.
Is formed. These locking pieces 11f, 11f are separated by a split portion 11d formed in the axial direction of the connecting rod 11. That is, when the locking pieces 11f, 11f are press-fitted into the stepped holes 6h in the end piece 6E, the splitting portion 11d promotes the deformation of the locking pieces 11f, 11f to enable locking (see FIG. 13). The connecting rods 11 are mounted by forming grooves 10 at every other place between the holding holes 7 of the piece 6. Further, it may be provided at a position between all the holding holes 7.

When the holding hole 7 is machined in the cage 3 of the bearing device 1 as described above, the division holes 7s may be machined in the mating surface P of each piece 6 at predetermined intervals. The holding hole is integrally formed,
This is easier than the step of holding the roller member 4 by crimping, and the manufacturing cost can be suppressed. In addition, when forming the piece 6 itself, if it is formed as a divided piece further divided into two as shown by the dashed line in FIG.
Since only one molding die is required, the manufacturing cost can be further reduced.

When assembling the retainer 3, first, the locking pieces 11f, 11f at the tips of all the connecting rods 11 are press-fitted into the stepped holes 6h of the end piece 6E to be positioned on the upper end side, and then the stacking is performed. With the roller member 4 arranged in the dividing hole 7s forming the holding hole 7 formed on the mating surface P of the piece 6 to be inserted, the piece 6 is inserted through the coupling rod 11 along the groove 10 on the outer surface. And the layers are sequentially laminated until the piece 6 on the lower end side is reached (see FIG. 13). Then, the engaging pieces 11f and 11f of the connecting rod 11 are press-fitted into the stepped holes 6h of the end piece 6E on the lower end side to complete the assembly. In addition,
If the holding holes 7 provided in the cage 3 are set so that the adjacent holding holes 7 are displaced in the axial direction of the cage 3 by a certain rule, the cage 3 moves relative to the guide shaft 5. At this time, the impact when the roller member 4 of the retainer 3 comes into contact with the outer periphery of the guide shaft 5 can be averaged and softened. By suppressing microvibration, the durability of the contact portion of the roller member 4 etc. is also improved. Can be made.

Further, the retainer 3 in the bearing device 1 according to the present invention can be constructed as follows. That is, as shown in FIG. 15, in this cage 3,
As a connecting means for the laminated pieces 6, an insertion hole 12 is formed in the piece 6 in the longitudinal axis direction, and the insertion hole 1 is formed.
2 to the mating surface P of the piece 6 between the pieces 6 at both ends.
The connecting rod 13 is formed so as to be inserted in a direction orthogonal to the connecting rod 13. The connecting rod 13 is a long screw shaft, has a head portion 13a formed on the upper end side, and is screwed on the end side. In order to connect the pieces 6 stacked by the connecting rod 13, the head 1 of the connecting rod 13 is attached to the piece 6 on the upper end side.
A head hole 14 for accommodating 3a is formed, and a screw hole 15 is formed in the piece 6 on the lower end side. The head hole 14 in the upper end side piece 6 and the screw hole 1 in the lower end side piece 6
5, the insertion holes 12 in the intermediate piece 6 are formed at all positions between the holding holes 7 of the piece 6 (see FIG. 16).

Also in the retainer 3 as described above, at the time of assembly, first, the end piece 6E to be positioned on the upper end side.
The connecting rod 13 is inserted through the head hole 14 of the connecting rod 13 so that the head 13a of the connecting rod 13 is housed therein, and the holding hole 7 formed on the mating surface P of the pieces 6 to be laminated next is formed into the dividing holes 7s. With the member 4 arranged, the piece 6 is held in the holding hole 7
The connecting rod 13 is inserted into the insertion hole 12 between the layers and laminated,
The layers are sequentially stacked up to the end piece 6E on the lower end side. At that time, the assembly is completed by screwing the end side of the connecting rod 13 into the screw hole 15 of the end piece 6E on the lower end side. In such an assembly structure, since the insertion holes 12 are provided at all positions between the holding holes 7 of the piece 6 and are joined by the connecting rods 13, the connecting rods 13 are held sufficiently at the completion of the assembly. It is not exposed to the outside of the container 3 and is preferable in appearance.

[0029]

According to the present invention, 1. The cage can be formed by processing each piece and combining them. At this time, the holding hole <br/> for holding the roller member, when forming each piece, it is sufficient to process the split holes in the holding hole, a center line of the mating surfaces of adjacent pieces, the holding hole Can be easily processed, and the manufacturing cost can be suppressed. 2. A pair of adjacent pieces may be combined to form a holding hole with the mating surface of these pieces as the center line. 3. If the ring-shaped piece with the holding hole divided into the mating surface is formed from the two divided pieces, the number of molds for the piece is one, and the manufacturing cost can be further suppressed. . 4. Each piece can be easily integrated by adhesion or fusion,
It can be reinforced by a linear body, a connecting means, or the like.

[0030]

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of a bearing device according to the present invention.

2 is a perspective view of one piece that is a component of the cage shown in FIG. 1. FIG.

FIG. 3 is a perspective view showing a pair of pieces shown in FIG.

FIG. 4 is a perspective view of a main part showing an assembled configuration of a cage according to the present invention.

FIG. 5 is an external perspective view showing another embodiment of the bearing device according to the present invention.

6 is an exploded perspective view of a pair of pieces and a roller member for forming a holding hole in the cage shown in FIG.

7 is an exploded perspective view showing how the roller member is assembled in the holding holes of the set of pieces shown in FIG.

FIG. 8 is an exploded perspective view of two sets of pieces holding roller members.

FIG. 9 is a perspective view showing a state in which three pieces constituting the cage are combined.

FIG. 10 shows an assembled structure of a cage according to the present invention,
FIG.

FIG. 11 is an external perspective view showing another example of the cage in the bearing device according to the present invention.

12 is a side view of a cage in the bearing device shown in FIG. 11. FIG.

FIG. 13 is an exploded view showing an assembled configuration of the cage shown in FIG.

14 is a cross-sectional view of the cage shown in FIG.

FIG. 15 is an exploded view showing another embodiment of the retainer of the bearing device according to the present invention.

16 is a cross-sectional view of the cage shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Bearing device 2 Outer cylinder 3 Cage 4 Roller member 5 Guide shaft 6 Piece 6E End piece 6h Step hole 7 Holding hole 7s Dividing hole 8 Engagement groove 9 Linear member 10 Groove 11 Coupling rod 11f Locking piece 11d Split section 12 insertion hole 13 connecting rod 13a head 14 head hole 15 screw hole P mating surface C coupling surface

Continuation of the front page (56) Reference JP 48-17042 (JP, A) JP 50-112643 (JP, A) JP 2000-320551 (JP, A) Actual development JP 60-94332 (JP, U) Actual development 51-50136 (JP, U) Actual development 58-40620 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16C 29/04 F16C 33/38-33 / 56

Claims (8)

(57) [Claims] 1. An outer cylinder is mounted movably relative to a guide shaft through a cage incorporating a large number of roller members, and the roller member has a shape in which an intermediate portion is bulged.
And has the cage divided in the axial direction parallel to the moving direction.
It consists of multiple pieces, and these multiple pieces
Dividing holes are formed in the mating surfaces adjacent to each other, and the roller member is rotated about the mating surface as a center line.
A holding hole for rotatably holding the
Adjacent to each other by forming an engagement groove in the direction orthogonal to the longitudinal direction
The mating surfaces of the pieces are fixed to each other by fixing means.
At the same time, wrap a linear member around the engaging groove to
The cages are connected to each other and assembled as a cylindrical cage.
Bearing device characterized by having a structure . 2. An outer cylinder is movably mounted on a guide shaft through a retainer incorporating a large number of roller members, and the roller members have a shape in which an intermediate portion is bulged.
And has the cage divided in the axial direction parallel to the moving direction.
Were composed of a plurality of pieces, the plurality of pieces
Then, set a pair of pieces as a set and place them on the mating surface of the pieces.
Divide each hole into holes and use the mating surface as the center line.
A holding hole for rotatably holding the roller member,
Engage in the proper place of the piece in the direction orthogonal to the longitudinal direction of the piece.
A mating groove is formed so that the mating surfaces of adjacent pieces
It is fixed by the fixing means and the linear portion is formed in the engaging groove.
Cylindrical shape by wrapping material and connecting multiple pieces together
A bearing device characterized by being configured to be assembled as a retainer . 3. A cage incorporating a large number of roller members.
Mount the outer cylinder so that it can move relative to the guide shaft.
The roller member has a shape with a bulged middle portion.
The retainer has a structure in which a plurality of ring-shaped pieces are laminated to form a cylindrical shape.
Forming dividing holes on each mating surface to center the mating surface.
Holding that holds the roller member rotatably, which is the core wire
A hole, and the pieces are fixed to each other by fixing means
Together with the piece mating surface between each of the pieces
By inserting the connecting means in the direction orthogonal to the holder,
Bearing device characterized by the integrated structure
Place 4. The piece is divided to form a holding hole.
Mating surface with holes formed at regular intervals and facing the mating surface
As a unit, a split piece with the surface to be joined as a connecting surface,
Integrally connecting the connecting surfaces of these divided pieces to each other
The bearing according to claim 3, characterized in that
Equipment . 5. The connecting means has a long surface on the outer surface of the piece.
A groove is engraved in the hand axis direction, and both ends are
Fit between pieces in a direction orthogonal to the mating surface of the pieces
The bearing device according to claim 3 or 4, wherein the bearing device is configured by a connecting rod that is inserted . 6. The connecting means is provided on the piece in a longitudinal direction.
Insert a through hole in the same direction and insert both ends through this through hole.
Between the pieces in the direction orthogonal to the mating surface of the pieces
The bearing device according to claim 3 or 4, wherein the bearing device is configured by a connecting rod that is inserted . 7. The fixing means is used for aligning the pieces.
The bearing device according to any one of claims 1 to 3, wherein the surfaces are fixed to each other by adhesion . 8. The fixing means melts the pieces together.
The bearing device according to any one of claims 1 to 3, wherein the bearing device is fixed by adhesion.
Place