JPH10131975A - Wear-preventing sleeve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wear-preventing sleeve whose automatic mounting can be made in a casting mold by being molded insertingly to the cast member in a condition surely performing coming off stop and turn lock relating to a support hole. SOLUTION: When a cast member 18a provided with a support hole 42, which must support a rotary member 44a, is molded, a wear preventing sleeve 70, is inserted in a position formed with the support hole 42 while slidably supports the rotary member 44a to prevent wear in the support hole 42. This wear preventing sleeve is formed as a cylindrical shape having an equal external/internal diametric dimension from one opening part 70a to the other opening part 70b. In this wear preventing sleeve, a first groove 74 extended from a peripheral end part to a peripheral middle part in one opening part side and a second groove 76 extended from a peripheral end part to the peripheral center part in the other opening part side are formed with a prescribed space apart in the peripheral direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of molding a cast member having a support hole for supporting a rotating member, by sliding the loosely fitted rotary member into a position where the support hole is to be formed. The present invention relates to a wear prevention sleeve that is movably supported to prevent wear of the casting member.

[0002]

2. Description of the Related Art As a bearing structure of a power transmission device, there is known a structure described in, for example, an automatic transmission for vehicles disclosed in Japanese Patent Application Laid-Open No. 58-207552.

FIG. 10 shows a main part of the structure. An output gear 4 is coaxially fixed to the outer periphery of a power transmission shaft indicated by reference numeral 2 in the figure, and a bearing 6 is attached to the shaft of the output gear 4.
Inner race 6a is fitted on the outside. The outer race 6b of the bearing 6 is loosely mounted in a bearing hole 10 formed in the inner wall of the device case 8, so that the power transmission shaft 2 can rotate while the outer race 6b rotates in the bearing hole 10. I support it.

Here, the device case 8 is a cast member made of an aluminum alloy. A sleeve 12 made of cast iron is inserted into the bearing hole 10, and a reduced diameter portion 12b is provided at one end of a cylindrical portion 12a. It is shaped. When the apparatus case 8 is formed by a pressure die casting method or the like, the cast iron sleeve 12 is attached to the position where the bearing hole 10 is formed in the mold, and the outer peripheral portion of the cast iron sleeve 12 is immersed in molten aluminum alloy. It is cast-in by welding. Thereby, the outer race 6 of the bearing 6
Since a slides on the inner peripheral surface of the cast iron sleeve 12, wear of the bearing hole 10 is prevented.

[0005]

However, since the device case 8 made of an aluminum alloy casting and the cast iron sleeve 12 have different coefficients of linear expansion, when the temperature near the bearing hole 10 becomes high, the cast iron sleeve 12 is loose. May occur. If the power transmission shaft 2 is supported in a state in which rattling occurs in the cast iron sleeve 12, the cast iron sleeve 12 rotates together with the outer race 6b of the bearing 6, and the cast iron sleeve 12 functions to prevent wear. Can not.

The reduced diameter portion 12b provided only at one end of the cast iron sleeve 12 has a bearing 6 and a bearing hole 1b.
0 and has a function of preventing the cast iron sleeve 12 from falling off. However, the cast iron sleeve 1
When the insert 2 is inserted, the reduced diameter portion 12b is
The mounting direction of the cast iron sleeve 12 in the mold must always be checked so as to be located inside the inside of the mold. For this reason, it is difficult to automatically mount the cast iron sleeve 12 in the mold in a high-temperature atmosphere state, and there is a problem in productivity of the device case 8.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is possible to insert a cast member into a cast member in a state where the support hole is securely prevented from coming off and detented, and the cast member is formed. It is an object of the present invention to provide an abrasion prevention sleeve which can be automatically mounted in a mold at the time.

[0008]

According to a first aspect of the present invention, there is provided a wear-resistant sleeve according to the first aspect of the present invention, wherein a casting member having a support hole for supporting a rotating member is formed at a position where the support hole is formed. An abrasion-resistant sleeve which is slidably supported to slidably support the rotating member to prevent abrasion of the casting member, and having the same outer diameter and inner diameter from one opening to the other. A first groove or protrusion extending from the outer peripheral end on one opening side to the outer peripheral center, and extending from the outer peripheral end on the other opening side to the outer peripheral center while being formed as a shape. The second groove or convex portion,
They were formed at predetermined intervals in the circumferential direction.

According to a second aspect of the present invention, there is provided the wear prevention sleeve according to the first aspect, wherein the outer peripheral center portion is connected to the first groove or the convex portion and the second groove or the convex portion. A circumferential groove or ridge extending in the direction was formed.

Further, according to the present invention, when a cast member having a support hole for supporting a rotating member is formed,
A wear-preventing sleeve that is insert-filled at a position where the support hole is formed and slidably supports the rotating member to prevent wear of the casting member, and is the same from one opening to the other opening. It was formed into a cylindrical shape having an outer diameter dimension and an inner diameter dimension, and a plurality of concave portions or convex portions were formed at predetermined intervals in the circumferential direction of the outer peripheral central portion.

According to a fourth aspect of the present invention, when a cast member having a support hole for supporting a rotating member is formed, the casting member is inserted into a position where the support hole is formed, and the rotating member is slidable. A wear prevention sleeve for supporting the casting member to prevent abrasion of the casting member. The sleeve has a cylindrical shape having the same outer diameter and inner diameter from one opening to the other, and has one opening. A first notch portion cut out from the side toward the center of the tube and a second notch portion formed from the other opening side toward the center of the tube are formed at predetermined intervals in the circumferential direction. .

The wear prevention sleeve according to claim 5 is formed of the same material as the cast member in the invention according to any one of claims 1 to 4. Further, the wear prevention sleeve according to claim 6 is the wear prevention sleeve according to claim 5, wherein the content of Si is set in a range of 14.0 to 17.5% by weight%.

[0013]

According to the wear prevention sleeve of the first aspect of the present invention, the support hole is formed as a cylindrical shape having the same outer diameter and inner diameter from one opening to the other opening. When casting in the position to form the
It can be mounted in the mold from either the opening side or the other opening side. As described above, since the mounting direction of the sleeve is lost, the sleeve can be automatically mounted. Therefore, the productivity of the cast member in which the sleeve is inserted can be improved.

The wear prevention sleeve according to the present invention has a first extension extending from the outer peripheral end on one opening side to the outer peripheral center.
And a second groove or convex portion extending from the outer peripheral end on the other opening side to the outer peripheral center portion is formed at a predetermined interval in the circumferential direction. The first groove or the convex portion and the second groove or the convex portion can reliably prevent the sleeve from coming off and the rotation.

That is, when a sleeve provided with a first groove and a second groove is used and the sleeve is inserted so that the first groove is located on the bottom side of the support hole, the sleeve is inserted into the first groove. The solidified portion of the cast member that has entered restricts axial movement of the sleeve. When the sleeve is cast so that the second groove is located on the bottom side of the support hole, the solidified portion of the cast member that has entered the second groove restricts the axial movement of the sleeve. Further, the solidified portion of the cast member that has entered the first groove and the second groove regulates the rotation of the sleeve. For this reason, it is possible to reliably prevent the sleeve from coming off and rotating.

Further, when a sleeve having a first convex portion and a second convex portion is used and the sleeve is cast so that the first convex portion is located on the bottom side of the support hole, the first convex portion is formed. The solidified portion of the cast member located closer to the opening of the support hole regulates the axial movement of the sleeve. When the sleeve is cast so that the second convex portion is located on the bottom side of the support hole, the second
The solidified portion of the casting member located closer to the opening of the support hole than the convex portion restricts the axial movement of the sleeve. Then, the solidified portion of the casting member located around the first convex portion and the second convex portion regulates the rotation of the sleeve.

According to the wear prevention sleeve of the present invention, the circumferential groove or the ridge extending in the circumferential direction at the central portion of the outer periphery is formed, and the solidified portion of the cast member that has entered the circumferential groove. Alternatively, since the solidified portion of the casting member located on the side in the circumferential direction of the ridge restricts the movement of the sleeve in the axial direction, the sleeve can be more reliably prevented from coming off.

According to a third aspect of the present invention, a plurality of recesses or protrusions are formed at predetermined intervals in a circumferential direction of a central portion of the outer periphery, and a solidified cast member that has entered the recesses. The portion or the solidified portion of the casting member located around the ridge regulates the axial movement and rotation of the sleeve, and can reliably prevent the sleeve from coming off and rotating.

According to the wear prevention sleeve of the present invention, the first notch portion cut out from one opening side of the cylindrical sleeve toward the center of the cylinder and the other opening side. From the second notch toward the center of the cylinder,
Formed at a predetermined interval in the circumferential direction, the solidified portion of the cast member that has entered the first notch and the second notch regulates the axial movement and rotation of the sleeve, and the sleeve comes off. Stopping and rotation stopping can be reliably performed.

According to a fifth aspect of the present invention, the sleeve of the present invention is formed of an aluminum alloy having the same coefficient of linear expansion as that of the cast member, so that even if the periphery of the support hole is in a high temperature state, No rattling occurs, and the rotating member can be reliably supported.

Here, Si is an important element for improving the wear resistance of the aluminum alloy. And Si
If the content is less than 14.0% by weight, the wear resistance tends to be insufficient, and if the Si content exceeds 17.5% by weight, the liquidus line of the alloy rises and the solubility and castability tend to deteriorate. In view of this, the wear prevention sleeve according to claim 6 has a content of Si in the range of 14.0 to 17.5% by weight, so that the sleeve has excellent wear resistance and castability. Thereby, the rotating member slides and rotates on the inner peripheral surface of the sleeve having excellent wear resistance, so that the wear of the support hole can be more reliably prevented.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a wear prevention sleeve according to the present invention.

FIG. 1 shows a continuously variable transmission according to the present invention.
A forward / reverse switching mechanism 22, a V-belt type continuously variable transmission mechanism 24, and a differential device 26 are provided, and the rotation of an output shaft 28 of the engine is changed to a predetermined speed ratio and a rotation direction to change the differential device 2
6 can be transmitted to the drive shaft.

The torque converter 20 has a lock-up mechanism. By controlling the oil pressure in the lock-up oil chamber, the input side pump impeller and the output side turbine liner can be mechanically connected or disconnected. And The output shaft of the torque converter 20 is connected to the forward / reverse switching mechanism 22 via the rotary shaft 30.

The forward / reverse switching mechanism 22 includes a planetary gear mechanism 22a, a forward clutch 22b, and a reverse brake 22c. The planetary gear mechanism 22a includes a sun gear, a pinion carrier, and an internal gear. Have been. The sun gear is connected so as to rotate integrally with the rotating shaft 30, and the pinion carrier is connected to the forward clutch 22b.
Can be connected to the rotating shaft 30. The internal gear can be fixed to a stationary portion by a reverse brake 22c. The pinion carrier is connected to a drive shaft 32 disposed on the outer periphery of the rotation shaft 30.

The V-belt type continuously variable transmission mechanism 24 includes a drive pulley 34 provided coaxially with the drive shaft 32 and a drive shaft 32.
A driven pulley 38 is provided coaxially with a driven shaft 36 disposed in parallel with the driven pulley 34, and a V-belt 40 is connected between the driving pulley 34 and the driven pulley 38 so as to be able to transmit.

That is, the drive shaft 32 is rotatably supported by bearings 44 and 48 mounted in the casing 18, and the driven shaft 36 is
The bearing 8 is rotatably supported by bearings 52 and 56 mounted in the housing 8.

The drive pulley 34 includes a movable cone member 34b which rotates integrally with the drive shaft 32 and which is disposed opposite to the fixed cone member 34a to form a V-shaped pulley groove. The chamber can be moved in the axial direction of the drive shaft 32 by hydraulic pressure acting on the chamber. Further, the driven pulley 38 is configured such that a fixed cone member 38a rotates integrally with the driven shaft 36, and a movable cone member 38b which is disposed opposite to the fixed cone member 38a to form a V-shaped pulley groove acts on the driven pulley cylinder chamber. The driven shaft 36 can be moved in the axial direction by the applied hydraulic pressure. The V-belt 40 is communicatively coupled to the pulley grooves of the driving pulley 34 and the driven pulley 38, so that the V
A belt-type continuously variable transmission mechanism 24 is configured.

Further, in the differential gear 26, a drive gear 58 coaxially connected to the driven shaft 36 has an idler gear 62 coaxially connected to an idler shaft 60 arranged parallel to the driven shaft 36.
And a pinion 64 provided on the idler shaft 60 meshes with the final gear 66. The final gear 66 is provided with a pair of pinions and side gears that mesh with each other, and the left and right drive shafts are respectively connected to the pair of side gears.

Incidentally, the casing 18 described above is made of S
1. An aluminum alloy cast member having an i content of about 12% by weight, as shown in FIG. 1, a side cover 18a arranged on the left side in the figure, a first case 18b arranged on the right side in the figure, and a side cover A second case 18c is integrated between the flange 18a and the second case 18b by connecting flanges with fastening bolts.

The bearings 44 and 52 described above
Are bearing holes 42 provided in the inner wall of the side cover 18a,
The bearings 48 and 56 are loosely mounted in the bearing holes 46 and 54 provided in the second case 18c.

That is, FIG. 2 shows the bearing 44 mounted in the bearing hole 42 of the side cover 18a in an enlarged view. When casting the side cover 18a, the bearing 44 is located at a position where the bearing hole 42 is formed. A sleeve 70 is cast.

The sleeve 70 is made of Si: 1 by weight%.
4.5-16.5%, Fe: 0.75-1.20%, C
u: 3.00 to 4.00%, Mg: 0.55 to 0.90
%, Mn: 0.40 to 0.60%, Cr: 0.15 to
An aluminum alloy member containing 0.30% and Ti: 0.05 to 0.15%, the Zn content is regulated to less than 1.00%, and the balance is substantially Al.

As shown in FIG. 3, the sleeve 70 is formed as a cylindrical member having the same outer diameter and inner diameter from one opening 70a to the other opening 70b. the D _1, set with a dimension than the outer diameter of the outer race 44b of the bearing 44.

On the outer periphery of the sleeve 70, a _first extending from the outer peripheral end on the side of the one opening 70a to the outer peripheral center (indicated by the broken line 72) along the axial direction P1.
Grooves 74 are formed. Also, the other opening 70b
The second groove 76 extending to the outer peripheral central portion 72 along the outer edge of the side in the axial direction P ₁ is formed. The first groove 74 and the second groove 76 are formed at predetermined intervals in the circumferential direction.

When the side cover 18a is formed by a pressure die casting method or the like, the above-described sleeve 70 is disposed in a mold for forming the bearing hole 42, and the outer periphery of the sleeve 70 is welded to a molten aluminum alloy. It is cast-in. At this time, the molten aluminum alloy of the side cover 18a poured near the outer periphery of the sleeve 70 flows into the first groove 74 and the second groove 76 and solidifies.

Then, as shown in FIG.
The outer race 44b is loosely mounted in the bearing hole 42, and the outer race 44b supports the drive shaft 32 while sliding on the inner peripheral surface of the sleeve 70.

According to the present embodiment, even when an axial external force is applied to push the sleeve 70 out of the bearing hole 42, the plurality of first grooves located on the opening side of the bearing hole 42. since solidified portion of the side cover 18a that has entered into the 74 (indicated by the letter S ₁ designates shown in FIG. 2) is to regulate the axial movement of the sleeve 70, to ensure the sleeve 70 from coming out the bearing hole 42 Can be prevented.

Even if a rotating force acts on the sleeve 70 from the rotating outer race 44b, the first groove 74
A solidified portion S ₁ that enters within, since the solidified portion S ₂ that enters into the second groove 76 to restrict the rotation of the sleeve 70, it is possible to reliably prevent rotation of the sleeve 70.

Further, the side cover 18a and the sleeve 7
Since 0 is formed of an aluminum alloy having substantially the same linear expansion coefficient, the sleeve 70 does not rattle even when the bearing 42 is in a high temperature state.

Since the sleeve 70 is formed in a cylindrical shape, the one opening 70a or the other opening 70b
Either of them may be located inside the formation position of the bearing hole 42 in the mold, and the mounting direction of the sleeve 70 is lost, so that the mounting property in the mold is improved and the sleeve 70 can be automatically mounted. Become. Therefore, the side cover 18a
Can be improved in productivity.

Here, Si is an important element for improving the wear resistance of the aluminum alloy. And Si
If the content is less than 14.0% by weight, the wear resistance tends to be insufficient, and if the Si content exceeds 17.5% by weight, the liquidus line of the alloy rises and the solubility and castability tend to deteriorate. Therefore, in the sleeve 70 of the present embodiment, the content of Si is set to 14.5 to 16.5% by weight of Si.
A sleeve with excellent wear resistance and castability. As a result, the inside of the sleeve 70 having excellent wear resistance is placed inside the bearing 44.
Outer race 44b slides and rotates.
2 can be reliably prevented.

In the above embodiment, the side cover 1
Although the structure in which the sleeve 70 is cast into the bearing hole 42 of the side cover 8a is shown, the bearing hole 50 of the side cover 18a, the second
Even if the sleeve 70 having the above structure is cast into the bearing holes 46 and 54 of the case 18c, the same operation and effect as the above embodiment can be obtained.

FIG. 4 shows a sleeve 80 of a second embodiment having a different shape from the sleeve 70 of the first embodiment shown in FIG. 1 to 3
The same reference numerals are given to the same components as those shown in FIG.

The sleeve 80 is a member made of an aluminum alloy having the same material composition as the sleeve 70 of the first embodiment. Also, its external shape, with which a cylindrical member which has the same outer diameter and inner diameter from one opening 80a to the other opening 80b, also the inner diameter D _1, an outer race 44b of the bearing 44 The size is set to be larger than the outside diameter of.

[0046] Further, the outer periphery of the sleeve 80, a first groove 82 extending from the outer peripheral edge of one opening 80a side to the outer peripheral central portion along the axial direction P ₁ is given in the circumferential direction spacing spaced formed in plurality, a second groove 84 extending to the outer peripheral central portion from the outer circumferential edge of the other opening 80b side along the axial direction P ₁ is, are formed at a given interval in the circumferential direction ing.

Here, the sleeve 80 of the present embodiment includes
A peripheral groove 86 is formed so as to extend in the circumferential direction at the outer peripheral center portion, and all the first grooves 82 and the second grooves 84 are connected to the peripheral groove 86.

When the side cover 18a is molded by a pressure die casting method or the like, the sleeve 80
Is disposed in a mold forming the bearing hole 42, and the sleeve 8
When the outer periphery of No. 0 is welded to the molten aluminum alloy and cast, the molten aluminum alloy of the side cover 18a poured near the outer periphery of the sleeve 80 has all the first and second grooves 82 and 84, It flows into the circumferential groove 86 and solidifies.

Therefore, when the sleeve 80 of the present embodiment is inserted into the bearing hole 42, the same operation and effect as those of the first embodiment can be obtained, and the shaft 80 for pushing the sleeve 80 out of the bearing hole 42 can be obtained. The side cover 18a that has entered the circumferential groove 86 even when an external force in the
The solidified portion restricts the movement of the sleeve 80 in the axial direction, so that the sleeve 80 can be reliably prevented from falling out of the bearing hole 42.

Also, even if a rotational force acts on the sleeve 80 from the rotating outer race 44b, the first groove 82
The solidified portion that has entered the inside and the solidified portion that has entered the second groove 84 regulate the rotation of the sleeve 70 and reliably prevent the rotation.

The bearing hole 5 of the side cover 18a
Even if the sleeve 80 having the above structure is inserted into the bearing holes 46 and 54 of the second case 18c, the same operation and effect as the above embodiment can be obtained.

FIG. 5 shows a sleeve 88 according to the third embodiment. This sleeve 88 also
This is a member made of an aluminum alloy containing a material having the same composition as the sleeve 70 of the first embodiment. Also, its external shape, with which a cylindrical member which has the same outer diameter and inner diameter from one opening 88a to the other opening 88b, also the inner diameter D _1, the bearing 44
Of the outer race 44b is larger than the outer diameter of the outer race 44b.

A plurality of recesses 90 are formed in the center of the outer periphery of the sleeve 88 at predetermined intervals in the circumferential direction. When the side cover 18a is formed by a pressure die casting method or the like, if the sleeve 88 is disposed in a mold that forms the bearing hole 42 and is cast-in, the side cover poured around the outer periphery of the sleeve 88 is formed. The molten aluminum alloy 18a flows into all the recesses 90 and solidifies.

Therefore, when the sleeve 88 of the present embodiment is cast into the bearing hole 42, the same operation and effect as those of the first embodiment can be obtained, and the shaft 88 for pushing the sleeve 88 out of the bearing hole 42 can be obtained. Direction, or a rotational force acts on the sleeve 80 from the rotating outer race 44b, the solidified portion of the side cover 18a that has entered the recess 90 forms the sleeve 88.
Axial movement and rotation are regulated. Therefore, it is possible to reliably prevent the sleeve 88 from falling out of the bearing hole 42 or to prevent the sleeve 88 from rotating.

FIG. 6 shows a sleeve 92 according to a fourth embodiment. This sleeve 92 also
This is a member made of an aluminum alloy having the same material composition as the sleeve 70 of the first embodiment. Also, its external shape, with which a cylindrical member which has the same outer diameter and inner diameter from one opening 92a to the other opening 92b, also the inner diameter D _1, an outer race 44b of the bearing 44 The size is set to be larger than the outside diameter of.

A plurality of slots 94 are formed in the center of the outer periphery of the sleeve 92 at predetermined intervals in the circumferential direction. When the side cover 18a is formed by a pressure die casting method or the like, the sleeve 92 is disposed at a mold position where the bearing hole 42 is formed, and the sleeve 92 is cast. The aluminum alloy melt 18a flows into all the slots 94 and solidifies.

Therefore, when the sleeve 92 of the present embodiment is cast into the bearing hole 42, the same operation and effect as those of the first embodiment can be obtained, and the shaft 92 which pushes the sleeve 92 out of the bearing hole 42 can be obtained. Direction, or a rotating force acts on the sleeve 92 from the rotating outer race 44b, the solidified portion of the side cover 18a that has entered the slot 94 causes the axial movement of the sleeve 92 to move. And restrict rotation. Therefore,
It is possible to reliably prevent the sleeve 92 from falling out of the bearing hole 42 or to prevent the sleeve 92 from rotating.

FIG. 7 shows a first modification of the sleeve 70 of the first embodiment. This sleeve 96
Is an aluminum alloy member containing a material having the same composition as the sleeve 70 of the first embodiment. In addition, the external shape is changed from one opening 96a to the other opening 96b.
The inner diameter D ₁ is set to be larger than the outer diameter of the outer race 44 b of the bearing 44.

[0059] Here, the outer periphery of the sleeve 96, the first protrusion 100 extending from the outer peripheral edge of one opening 96a side to the outer peripheral central portion 98 along the axial direction P _1, the circumferential direction Are formed at predetermined intervals. The second protrusion 102 extending from the outer periphery of the other opening portion 96b side to the outer peripheral central portion 98 along the axial direction P ₁ also in the circumferential direction at predetermined intervals formed with a plurality.

When the side cover 18a is molded by a pressure die casting method or the like, the sleeve 96
8 is inserted into the mold position where the bearing hole 42 is formed, and FIG.
As shown in the figure, when the second convex portion 102 is located on the bottom side of the bearing hole 42, even if an external force in the axial direction that pushes the sleeve 96 out of the bearing hole 42 is applied, the second convex portion 102 is formed. solidified portion of the solidified side cover 18a at the opening side of the bearing hole 42 from the section 102 (indicated by symbol S ₃ shown in FIG. 2)
Restricts the axial movement of the sleeve 96.

The outer race 44b and the sleeve 9
6, the solidified portion of the side cover 18a solidified on the side surface 100a in the circumferential direction of the first convex portion 100 and the circumferential side surface 102a of the second convex portion 102 forms the sleeve 96. Regulate the rotation of Therefore, the sleeve 9
6 is removed from the bearing hole 42 or the sleeve 96
Can be reliably prevented from rotating.

When the sleeve 80 shown in FIG. 4 is changed to the structure of the above-described embodiment, that is, although not shown, the first groove 82 is changed to a convex portion, and the second groove 84 is changed to a convex portion. Further, even if the circumferential groove 86 is changed to a ridge that is continuous in the circumferential direction, the same operation and effect as the above-described embodiment can be obtained.

The recess 9 of the sleeve 88 shown in FIG.
0 may be changed to a convex portion, and the slot 94 of the sleeve 92 shown in FIG.
The same operation and effect as in the above-described embodiment can be obtained.

FIG. 9 shows a second modification of the sleeve 70 of the first embodiment. This sleeve 10
4 is also a member made of an aluminum alloy having the same material composition as the sleeve 70 of the first embodiment. Also, its external shape, with which a cylindrical member which has the same outer diameter and inner diameter from one opening 104a to the other opening 104b, also the inner diameter D _1, the bearing 4
The outer diameter of the outer race 44b is larger than the outer diameter of the outer race 44b.

The sleeve 104 has one opening 9
A first notch 106 is formed in the outer peripheral edge of 6a, and a plurality of first notches 106 are provided at predetermined intervals in the circumferential direction of the outer peripheral edge.
A second notch 108 is also formed at the outer peripheral edge of the other opening 96b, and a plurality of second notches 108 are formed at predetermined intervals in the circumferential direction.

When the side cover 18a is formed by a pressure die casting method or the like, the sleeve 10
4 is inserted into the mold position where the bearing hole 42 is formed, and the second notch 108 is located at the bottom side of the bearing hole 42. Acts, the side cover 18 solidified on the opening side of the bearing hole 42 from the second notch 108
The solidified portion a restricts the movement of the sleeve 104 in the axial direction.

The outer race 44b is connected to the sleeve 1
04, the first notch 106
The solidified portion of the side cover 18a that has flowed into the second cutout 108 and solidified regulates the rotation of the sleeve 104. Therefore, it is possible to reliably prevent the sleeve 104 from falling out of the bearing hole 42 or to prevent the sleeve 104 from rotating.

The sleeve 88 shown in FIG. 5 and FIG.
Is changed to a hole penetrating to the inner peripheral surface of the sleeve 88, and the slot 94 of the sleeve 92 shown in FIG.
Even if it changes to a long hole penetrating to the inner peripheral surface of the sleeve 92,
The same operation and effect as in the above-described embodiment can be obtained.

Here, the rotating member described in the claims of the present invention corresponds to the outer race of the bearings 44, 48, 52, 56, and the supporting holes are the bearing holes 42, 46, 5
0, 54, the cast member corresponds to the side cover 18a, the second case 18c, and the wear prevention sleeve corresponds to the sleeves 70, 80, 88, 92, 96, 104.

Each sleeve 70, 80, 88, 9
Reference numerals 2, 96 and 104 are not limited to aluminum alloy members having the above-described material composition. For example, Japanese Patent Application No. 7-176381 (a sliding member made of a wear-resistant aluminum alloy) previously filed by the present applicant. As described, Si: 14.0% by weight.
１７17.5%, Cu: 2.0-5.0%, Mg: 0.1
1.0%, Mn: 0.3-0.8%, Cr: 0.1-
0.3%, Ti: 0.05 to 0.25%, P: 0.00
3 to 0.050%, Fe: 1.5% or less, Ca content is regulated to less than 0.005%, and the balance is substantially Al and primary crystal S having an average particle size of 8 to 30 μm.
i, Al-Si-Fe-based intermetallic compound and Al-Si-
Among the Fe-Mn-Cr intermetallic compounds, a particle size of 5 to 40 µm
m are dispersed in the alloy in an area ratio of 5 to 10%, the surface roughness is Ra: 0.3 to 3.0, and even if the surface roughness of the member is larger than that of the mating material, wear resistance is high. Since the material has excellent properties, the same operation and effect as those of the above embodiments can be obtained.

Further, the number of the first groove 74 and the second groove 76 of the sleeve 70 shown in FIG. 3 is not limited to the number shown, but may be appropriately determined according to the magnitude of the external force applied to the sleeve 70. The number may be changed. Further, the number of the first grooves 82 and the second grooves 84 of the sleeve 80 shown in FIG. 4 is not limited to this.

The recess 9 of the sleeve 88 shown in FIG.
The number of slots 94 in the sleeve 92 shown in FIG. 6 is not limited to the number shown in the figure, and may be changed as appropriate according to the magnitude of external force applied to the sleeves 88 and 92.

Further, the number of the convex portions 100 and 102 of the sleeve 96 shown in FIG. 7 may be appropriately changed according to the magnitude of the external force applied to the sleeve 96, and the notch of the sleeve 104 shown in FIG. The number of parts 106 and 108
It may be changed as appropriate in accordance with the magnitude of the external force applied to the part 04.

[Brief description of the drawings]

FIG. 1 is a diagram showing an internal structure of a continuously variable transmission according to the present invention.

FIG. 2 is a view showing a bearing hole for supporting a rotating member in the continuously variable transmission of FIG. 1;

FIG. 3 is a perspective view showing a wear prevention sleeve having a first groove and a second groove according to claim 1 of the present invention.

FIG. 4 is a perspective view showing a wear prevention sleeve having a circumferential groove according to claim 2 of the present invention.

FIG. 5 is a perspective view showing a wear prevention sleeve having a concave portion formed in a central portion of an outer periphery according to a third embodiment of the present invention.

FIG. 6 is a perspective view showing a wear prevention sleeve in which a slot is formed in a central portion of an outer periphery according to a third embodiment of the present invention.

FIG. 7 shows a first projection and a second projection according to claim 1 of the present invention.
It is a perspective view which shows the wear prevention sleeve which formed the convex part of FIG.

8 is a view showing a structure in which the wear prevention sleeve shown in FIG. 7 is cast in a position where a bearing hole is formed.

FIG. 9 is a perspective view showing a wear prevention sleeve in which a first cutout and a second cutout are formed according to claim 4 of the present invention.

FIG. 10 is a view showing a bearing hole supporting a conventional rotating member.

[Explanation of symbols]

Reference Signs List 18 casing 18a side cover (cast member) 18c second case (cast member) 32 drive shaft 42, 46, 50, 54 bearing hole (support hole) 44, 48, 52, 56 bearing 44b outer race (rotating member) 70, 80 , 88, 92, 96, 104 Sleeve (anti-wear sleeve) 70a, 80a, 88a, 92a, 96a, 104a
One opening 70b, 80b, 88b, 92b, 96b, 104b
Openings 74, 82 First groove 76, 84 Second groove 86 Peripheral groove 90 Recess 94 Slot 100, 102 Convex 106, 108 Notch

Claims (6)

[Claims] When forming a cast member having a support hole for supporting a rotary member, the support member is slid to a position where the support hole is to be formed and slidably supports the rotary member. A wear-preventing sleeve for preventing abrasion of the outer peripheral portion, wherein the outer peripheral portion is formed in a cylindrical shape having the same outer diameter and inner diameter from one opening to the other opening, and is formed from the outer peripheral end on one opening side to the outer periphery. First extending to the center
And a second groove or convex portion extending from the outer peripheral end on the other opening side to the outer peripheral center portion is formed at a predetermined interval in the circumferential direction. Wear-resistant sleeve. 2. A peripheral groove or a ridge connected to the first groove or the convex part and the second groove or the convex part and extending in the circumferential direction is formed at the central part of the outer periphery. The wear prevention sleeve according to claim 1, wherein 3. When forming a cast member having a support hole for supporting a rotary member, the support member is slid into a position where the support hole is to be formed and slidably supports the rotary member. A wear-preventing sleeve for preventing abrasion of the outer peripheral portion, wherein the outer peripheral portion is formed in a cylindrical shape having the same outer diameter and inner diameter from one opening to the other opening, and is provided at a predetermined interval in a circumferential direction of the outer peripheral central portion. A plurality of concave portions or convex portions formed by opening the sleeve. 4. When forming a cast member having a support hole for supporting a rotating member, it is inserted into a position where the support hole is to be formed, and slidably supports the rotary member to form the support hole. A wear prevention sleeve for preventing abrasion, wherein the sleeve is formed as a cylindrical shape having the same outer diameter and inner diameter from one opening to the other opening, and from one opening side toward the center of the cylinder. A wear-preventing sleeve, wherein a first cut-out portion cut out and a second cut-out portion from the other opening side toward the center of the cylinder are formed at a predetermined interval in a circumferential direction. . 5. The wear prevention sleeve according to claim 1, wherein the wear prevention sleeve is formed of an aluminum alloy of the same material as the cast member. 6. The Si content is 14.0 to 1% by weight.
6. The wear prevention sleeve according to claim 5, wherein the sleeve is set in a range of 7.5%.