JPH09242783A - Synchronizer ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a weight and to prevent a hitting sound and hitting friction by forming a synchronizer ring main body of an aluminum alloy, subjecting the full surface or a part of its surface to a hard alumite treatment and fixing an annular body having a thermal expansion factor smaller than that of the aluminum alloy and a strength higher than that of the same in an outer periphery. SOLUTION: A synchronizer ring 13 is composed of a synchronizer main body 7 and an outer side annular body 12. The shape of the synchronizer ring main body 7 is formed to be a rotary body and since an aluminum alloy having low specific gravity is used, a weight is reduced, and since its outer surface is subjected to a hard alumite treatment, a wear resistance is increased. Further, since the synchronizer ring main body 7 is backed up by fitting a metal annular body 12 having a thermal expansion factor smaller than that of the main body 7 and a strength higher than that of the same in the outer peripheral part of the synchronizer ring 7, the synchronizer ring light in weight, having a high strength and little heat deformation and easily manufactured is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronizer ring used for a synchronous meshing device of an automobile transmission.

[0002]

2. Description of the Related Art In a so-called BorgWarner-type synchronous meshing device for a transmission for an automobile, a synchronizer ring is provided on an outer peripheral portion of the synchronous meshing device so as to form a pair with a clutch gear and face in the axial direction. As a material of the synchronizer ring, a cast or forged product of high-strength brass or aluminum bronze has conventionally been used.

[0003]

However, the synchronizer ring made of high-strength brass or aluminum bronze satisfies the required strength, but when the mass and the moment of inertia are large and the torque fluctuation is large at the time of idling, the outer peripheral portion of the synchronizer ring is required. Is hit at the engagement portion between the key groove and the shift key provided at the end of the shift key, which causes abrasion and abrasion. As a countermeasure, for example, Japanese Utility Model Publication No.
No. 32, JP-A-7-113427, JP-A-7-113
No. 428 proposes a lightweight synchronizer ring made of an aluminum alloy. However, this still has disadvantages in terms of strength, rotational balance, and manufacturing depending on the use conditions, and is still not sufficiently satisfactory.

That is, Japanese Utility Model Application Laid-Open No. 57-105432 and Japanese Patent Application Laid-Open No. Hei 7-113427 propose a structure in which alumite is applied to the entire circumference or a structure in which the strength is improved by using a hypereutectic aluminum alloy material. However, there are matters that have not yet been fully elucidated, such as deformation due to heat. Japanese Unexamined Patent Publication (Kokai) No. 7-113428 proposes a method in which a steel reinforcing material is buried inside as a countermeasure. However, this also has disadvantages in terms of manufacturing or rotational balance depending on use conditions. There is.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The present invention has been made to reduce the weight, to prevent the hitting sound and the wear due to the hitting, and as a synchronizer ring for various use conditions. An object of the present invention is to provide a synchronizer ring which has necessary strength and heat-resistant deformation properties and is easy to manufacture.

[0006]

In order to achieve the above object, a synchronizer ring according to the invention of claim 1 is a synchronizer ring used for a synchronous meshing device of an automobile transmission, wherein a synchronizer ring main body is provided. Along with molding with an aluminum alloy, the entire surface or a part of the surface is subjected to hard alumite treatment, and a metal ring having a smaller coefficient of thermal expansion and a higher strength than the aluminum alloy is fitted around the synchronizer ring body. It is characterized by doing. According to such a configuration, the outer periphery of the synchronizer ring body formed of an aluminum alloy having a low specific gravity can be backed up by a metal annular body having a small coefficient of thermal expansion and high strength, thereby suppressing thermal deformation of the synchronizer ring body. As a result, an advantageous synchronizer ring can be obtained for various use conditions.

In order to achieve the above object, the synchronizer ring according to the invention of claim 2 has, in addition to the structure of claim 1, a lining on a tapered inner diameter surface facing a cone portion of a clutch gear to be synchronized. It is characterized in that it is attached. According to this configuration, it is possible to obtain a synchronizer ring capable of performing synchronization with a small pressing force by further increasing the friction transmitting force.

According to a third aspect of the present invention, there is provided a synchronizer ring for use in a synchronous meshing device of an automobile transmission, wherein a synchronizer ring main body is formed of an aluminum alloy. At the same time, the entire surface or a part of the surface is subjected to hard alumite treatment, a metal ring having a strength higher than that of the aluminum alloy is fixed to the inner periphery of the synchronizer ring main body, and should be synchronized with the inner diameter of the ring. A tapered surface facing the cone portion of the clutch gear is provided, and a lining is attached to the tapered surface. According to such a configuration, a high-strength metal annular body is fixed to the inner peripheral portion of the synchronizer ring main body formed of an aluminum alloy having a small specific gravity, so that the strength and rigidity of the tapered surface are high and various usage conditions are satisfied. Advantageously, since the lining is attached to the tapered inner diameter surface of the annular body, it is possible to obtain a synchronizer ring capable of increasing the friction transmission force and performing synchronization with a small pressing force.

In order to achieve the above-mentioned object, the synchronizer ring according to the invention of "Claim 4" is a synchronizer ring used in a synchronous meshing device of a transmission for an automobile, wherein the synchronizer ring body is molded from synthetic resin. ,
A metal ring having a smaller coefficient of thermal expansion and a higher strength than the synthetic resin is fitted around the outer periphery of the synchronizer ring main body, and a taper facing the cone portion of the clutch gear to be synchronized with the inner diameter of the synchronizer ring main body. A surface,
A lining is attached to the tapered surface.
According to this configuration, the synchronizer ring main body is formed from a synthetic resin having a lower specific gravity than the aluminum alloy, so that the weight can be further reduced, and the outer periphery is formed of a metal ring having a small thermal expansion coefficient and high strength. Because it is backed up, thermal deformation is suppressed and it is advantageous for various use conditions.Furthermore, lining is affixed to the inner diameter tapered surface, so that friction transmission force is increased and synchronization is performed with a small pressing force Synchronizer ring that can be obtained.

According to a fifth aspect of the present invention, there is provided a synchronizer ring for use in a synchronous meshing device of an automobile transmission, wherein the synchronizer ring body is formed of synthetic resin. ,
A metal annular body having higher strength than the synthetic resin is fixed to the inner periphery of the synchronizer ring main body, and a tapered surface facing the cone portion of the clutch gear to be synchronized is provided on the inner diameter of the annular body. Characterized by affixing a lining. According to this configuration, the synchronizer ring main body is formed from a synthetic resin having a lower specific gravity than the aluminum alloy, so that the weight can be further reduced, and a high-strength metal annular body is fixed to the inner peripheral portion. From
The strength and rigidity of the tapered surface are high, which is advantageous for various use conditions. In addition, since the lining is attached to the inner diameter tapered surface of the annular body, synchronization is performed with a small pressing force by increasing the friction transmitting force. Synchronizer ring can be obtained.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 6 shows the structure of a synchronous meshing device for a transmission using the synchronizer ring of the present invention. FIG.
As shown in FIG. 1, this synchronous meshing mechanism is of a so-called BorgWarner type, in which a gear 2
And the gear 3 are rotatably mounted, respectively.
The clutch hub 4 is spline-fitted to an intermediate spline 4a, and between each gear 2.3 and the clutch hub 4, a clutch gear 5.6, a synchronizer ring 13
15, a sleeve 9 and a key 10 are provided as shown in FIG.

The clutch gears 5 and 6 are respectively connected to the gears 2 and 3 by splines, and synchronizer rings 13 and 15 are arranged on the outer periphery of the cone portions 5a and 6a (tapered surfaces). The sleeve 9 is attached to the outer periphery of the clutch hub 4 via a spline 9a so as to slide in the axial direction by the selector 11. The key 10 is formed so that the convex portion on the outer periphery thereof fits into the concave portion on the inner peripheral portion of the sleeve 9, and is provided with two springs 20 for urging inside, and between the clutch hub 4 and the sleeve 9. A plurality (generally three) are mounted at intervals in the circumferential direction. The key 10 has both ends engaged with the key grooves 12 a and 14 a of the synchronizer rings 13 and 15, respectively.
Fifteen rotation ranges are limited.

When the sleeve 9 is shifted by the selector 11 to change the gear for transmitting power to the output shaft 1, the synchronous meshing mechanism shown in FIG.
The sleeve 9 (always rotating integrally with the gear 2 or 3) and the sleeve 9 (always rotating integrally with the output shaft 1) are brought into synchronism with each other by the following action. Here, a case where the sleeve 9 is operated to the left in FIG. 6 will be described as an example.

(1) In the initial stage when the sleeve 9 is shifted in the axial direction (to the left in FIG. 6), first, the key 10
Moves together with the sleeve 9 in the same direction, and presses the synchronizer ring 13 against the cone portion 5a of the clutch gear 5 to start a synchronizing action (initial action) by friction.
At this time, torque transmission between the key groove 12a of the synchronizer ring 13 and the sleeve 9 is performed via the key 10.

(2) When the sleeve 9 is further moved, the tip of the spline 9a of the sleeve 9 comes into contact with the tip of the tooth 7b of the synchronizer ring body 7, and the sleeve 9 directly presses the synchronizer ring 13 against the clutch gear 5. To enhance synchronization. At this time, the key 10 is disengaged from the concave portion on the inner periphery of the sleeve 9 against the force of the spring 20 and is displaced in the axial direction from the sleeve 9.

(3) If the rotational speed difference between the sleeve 9 and the clutch gear 5 is eliminated by the synchronizing action of (1) and (2), the synchronizer ring 13 does not hinder the axial movement of the sleeve 9 and the sleeve 9 moves. The spline 9a smoothly meshes with the teeth 5b of the clutch gear 5,
Power is transmitted from the gear 2 to the output shaft 1.

FIG. 1 is an enlarged sectional view showing a first embodiment of a synchronizer ring according to the present invention. The synchronizer rings 13 and 15 are arranged on the left and right, respectively, as shown in FIG. 6, but are substantially the same on the left and right, and therefore only the left side will be described below. The synchronizer ring 13 includes the synchronizer ring main body 7 and the outer annular body 12. The shape of the synchronizer ring body 7 is a rotating body, and its outer peripheral portion is composed of a spline tooth 7b provided at one end and a boss 16 having a diameter smaller than the root of the spline tooth 7b. One end of the boss 16 opposite to the spline teeth 7b is provided with a recess 7 into which a keyway 12a (FIG. 3) of an outer annular body 12 described later is engaged.
a is provided at a plurality of positions equally dividing the circumference.

The inner periphery of the synchronizer ring main body 7 forming a rotating body is provided with a cone portion 5a of the clutch gear 5 (FIG. 6).
It is formed from a tapered surface 7g facing the (tapered surface). The synchronizer ring body 7 is formed from an aluminum alloy, and the entire surface of the synchronizer ring 7 is hard anodized. The synchronizer ring body 7 does not have a hard alumite treatment and has a silicon content of 13% to 30%.
% Hypereutectic aluminum alloy material may be used.

FIG. 3 is a partial perspective view of the outer annular body 12. In addition to the simple annular shape, the outer annular body 12 has a pocket-shaped key groove 12a at a position corresponding to the recess 7a so as to cover and protect the surface of the recess 7a, as shown in FIG. It has an added shape. This keyway 12a
Is provided to protect the surface of the concave portion 7a from being hit and worn, and is formed so as to fit into the concave portion 7a and to contact the circumferential wall surfaces 7c and 7d (FIG. 2) of the concave portion 7a. . The key groove 12a may be provided only when it is necessary to protect the surface of the concave portion 7a from being hit and worn, and is not necessarily essential. Therefore, the outer annular body 12
May be a simple ring fitted only to the L portion of FIG. 1 in a range that does not cover the concave portion 7a. The material used for the outer annular body 12 is steel (alloy steel, carbon steel, stainless steel),
Titanium alloys are suitable.

The outer annular body 12 is fitted to the boss portion 16 of the synchronizer ring body 7 by press-fitting. By applying a compressive residual stress to the synchronizer ring body 7 in advance, the apparent strength and rigidity of the synchronizer ring body 7 are obtained. And has the effect of withstanding the tensile stress generated during the gear shifting operation and at the same time suppressing deformation.
The method of fitting the outer annular body 12 may be any method, such as press-fitting, shrink fitting, cold fitting, etc., as long as the metal outer annular body 12 does not easily fall off.

Side wall surface 1 of keyway 12a of outer annular body 12
2c and 12d (FIG. 2) are hit by the key 10 due to the rotation speed fluctuation during idling of the engine (not shown) to which the transmission is mounted and the transmission of torque from the key 10 to the synchronizer ring 13 during shifting operation. However, since a material having higher strength than the synchronizer ring main body 7 is used for the outer annular body 12, there is little possibility of abrasion. Further, the annular body 12 can be formed with a uniform thickness, and the rotation center of the synchronizer ring main body 7 and the annular body 1 can be formed.
Since the rotation center coincides with the rotation center 2, the rotation balance is also excellent.

FIG. 4 is an enlarged sectional view showing a second embodiment of the synchronizer ring according to the present invention. The taper surface 7 on the inner periphery of the synchronizer ring main body 7 of the first embodiment is shown.
A lining 18 is attached to g to increase the coefficient of friction and enhance the synchronizing action. The lining 18 is made of a porous paper friction material.

According to the first and second embodiments described above, since the synchronizer ring body 7 is made of an aluminum alloy having a small specific gravity, the weight can be reduced.
In addition, since the outer surface is subjected to a hard alumite treatment, wear resistance can be enhanced. Further, since the metal ring body 12 having a smaller thermal expansion coefficient and higher strength than the main body of the synchronizer ring body 7 is fitted into the outer peripheral portion of the synchronizer ring body 7 to back up the synchronizer ring body 7, the weight is high while being lightweight. It is possible to obtain a synchronizer ring with less heat deformation and easy to manufacture. In the second embodiment, in addition to the above, the tapered surface 7 g
Since the lining 18 is attached to the, the friction transmission force is increased, and the synchronization can be performed with a small pressing force. Therefore, the stress of each part is reduced, and a more advantageous synchronizer ring can be obtained for various use conditions.

FIG. 5 is an enlarged sectional view showing a third embodiment of the synchronizer ring according to the present invention. The same reference numerals as those in the first embodiment denote the same parts. The synchronizer ring 13 is a synchronizer ring body 7.
And an inner annular body 17 and a lining 18. The shape of the synchronizer ring main body 7 is a rotating body, and its outer peripheral portion has a spline tooth 7b provided at one end.
And a boss 16 having a diameter smaller than the root of the spline teeth 7b. At one end of the boss 16 on the side opposite to the spline teeth 7b, a plurality of recesses 7e with which the key 10 is engaged are provided equally dividing the circumference. The synchronizer ring 13 is provided on the inner peripheral portion 7 of the synchronizer ring main body 7.
An inner cylindrical body 17 having a substantially cylindrical shape is fixed to f, a tapered surface 7g is formed on the inner periphery thereof, and the lining 18 is attached to the tapered surface 7g.

Although the synchronizer ring body 7 uses an aluminum alloy subjected to hard alumite treatment, a hypereutectic aluminum alloy having a high silicon content may be used. In the present embodiment, the inner annular body 17 is fixed by casting, but fitting by splines, screwing, press fitting, and the like can be appropriately selected and used. When using casting, a rotation stopper 1 such as a protrusion is provided on the outer circumference of the inner annular body 17.
It is effective to provide 7a. Steel (alloy steel, carbon steel, stainless steel) or titanium alloy is suitable for the material of the inner annular body 17.

As described above, the synchronizer ring main body 7 is made of an aluminum alloy and the surface is subjected to hard alumite treatment in the same manner as in the previous embodiment, but the inner peripheral portion of the synchronizer ring main body 7 is made of aluminum alloy. An annular body 17 made of a metal having high strength is fixed to the annular body 1.
Tapered surface 7 for synchronizing with clutch gear 5 on the inner diameter of 7
g, the tapered surface 7 due to heat and external force
The deformation of g was prevented. Further, by affixing the lining 18 to the inner diameter tapered surface 7g, the friction transmission force is increased,
Synchronization can be performed with a small pressing force. Therefore, the stress of each part is reduced, which is more advantageous for various use conditions. As described above, while being lightweight,
A synchronizer ring that can stably transmit the frictional force required for synchronous meshing can be obtained.

The synchronizer ring 13 of the fourth embodiment
In the second embodiment of FIG. 4, the material of the main body 7 is changed from aluminum alloy to synthetic resin. Next, a fourth embodiment will be described with reference to FIG. The synchronizer ring main body 7 is formed of a synthetic resin. Metal outer annular body 1 having a smaller thermal expansion coefficient and a higher strength than the synthetic resin on the outer peripheral portion of synchronizer ring body 7
2 by fitting the synchronizer ring body 7
Is backed up from the outer peripheral portion to prevent deformation of the synchronizer ring body 7 due to heat and reinforce the tensile stress at the time of engagement, and to further increase the frictional transmission force by attaching a lining 18 to the inner diameter tapered surface 7g. Synchronization can be performed with a small pressing force, thereby reducing the stress of each part generated in the synchronizer ring main body 7. As described above, the use of the synthetic resin is enabled, and a lighter synchronizer ring is obtained. Furthermore, since the synchronizer ring body 7 is made of a synthetic resin, the synchronizer ring 7 has a large damping ability, which is more effective as a measure against noise.

Synchronizer ring 13 of the fifth embodiment
In the third embodiment shown in FIG. 5, the material of the main body 7 is changed from an aluminum alloy to a synthetic resin. Next, a fifth embodiment will be described with reference to FIG. In this embodiment, an inner peripheral portion 7 of a synchronizer ring body 7 made of synthetic resin is used.
f, a metal inner annular body 1 having higher strength than the synthetic resin
7 is fixed by an insert (a method of embedding a material different from the resin material of the main body into the main body at the time of injection molding). By providing a tapered surface 7g for synchronizing with the clutch gear 5 on the inner periphery of the inner annular body 17, deformation of the tapered surface 7g due to heat and external force was prevented. Further, by adhering the lining 18 to the inner diameter tapered surface 7g, the frictional transmission force is increased so that synchronization can be performed with a small pressing force. Therefore, the stress of each part is reduced, which is advantageous for various use conditions. As described above, it is possible to obtain the synchronizer ring which is lighter in weight and can stably transmit the frictional force required for the synchronous engagement. Furthermore, since the synchronizer ring body 7 is made of synthetic resin,
It has a large damping capacity and is more effective as a noise countermeasure.

As a method for fixing the inner annular body 17 to the synchronizer ring body 7, in addition to the above-mentioned insert, fitting by spline, screwing, press fitting, etc. can be appropriately selected and used. When using an insert, it is effective to provide a rotation stopper 17a such as a protrusion on the outer circumference of the inner annular body 17. Steel (alloy steel, carbon steel, stainless steel) or titanium alloy is suitable for the material of the inner annular body 17.

The inner ring 17 (FIG. 5) can be provided on the synchronizer ring body 7 having the outer ring 12 (FIGS. 1 and 4), and a lining 18 can be attached. When the synchronizer ring main body 7 is formed by molding a synthetic resin, the outer ring 12
And it is also possible to abolish the inner annular body 17 and stick only the lining 18.

According to the various embodiments described above,
The following actions and effects can be achieved. That is, as in the first, second, and fourth embodiments, the outer annular body 1
According to the configuration in which the synchronizer 2 is fitted, even when a relatively soft and lightweight material such as aluminum or synthetic resin is used for the synchronizer ring main body, there is little deformation due to load and thermal expansion, and the mating taper surface of the inner diameter taper surface. A synchronizer ring that hardly causes a change in hit is obtained. Furthermore, since the outer annular body 12 is provided with an integral keyway 12a, the keyway (recess) of the synchronizer ring main body 7 made of a relatively soft material such as an aluminum alloy or a synthetic resin by the key 10 (FIG. 6). 7a wall surfaces 7c, 7d
Can be avoided from being hit.

According to the structure in which the inner annular body 17 is fixed as in the third and fifth embodiments, since the outer diameter is reduced, the mass and the moment of inertia can be reduced.
Synchronizer ring more advantageous for noise prevention can be obtained. Further, since the high-rigidity material is provided directly on the lining 18, the deformation due to the load and the thermal expansion is further suppressed, and the change in the contact between the inner taper surface and the mating taper surface is also suppressed. Further, according to the configuration in which the lining 18 is attached to the inner peripheral tapered surface 7g, it is possible to perform synchronization with a small pressing force by increasing the friction transmitting force, and to reduce the tensile stress generated in the synchronizer ring body 7 of the same size. Can be reduced.

The synergistic effect of the above-mentioned effects is that the synchronizer ring is lightweight, has low noise, hardly causes abrasion and deformation, has a large frictional transmission force at the time of synchronous meshing, and is easy to manufacture.

[0034]

As is apparent from the above description, according to the first aspect of the present invention, there is provided a synchronizer ring for use in a synchronous meshing device of an automobile transmission, wherein a synchronizer ring main body is formed of an aluminum alloy. In addition, the entire surface or a part of the surface is subjected to hard alumite treatment, and a metal ring having a smaller thermal expansion coefficient and a higher strength than the aluminum alloy is fitted to the outer periphery of the synchronizer ring main body. Even when molding with an aluminum alloy having a low specific gravity, the outer periphery can be backed up by a metal annular body having a small coefficient of thermal expansion and high strength, and thermal deformation of the synchronizer ring body is suppressed, and various usage conditions Synchronizer ring is provided.

According to the second aspect of the invention, in addition to the configuration of the first aspect, the lining is attached to the inner diameter tapered surface facing the cone portion of the clutch gear to be synchronized. In addition to the above, there is provided a synchronizer ring capable of performing synchronization with a small pressing force by increasing a friction transmitting force.

According to the third aspect of the present invention, there is provided a synchronizer ring for use in a synchronous meshing device of an automobile transmission, wherein a synchronizer ring main body is formed from an aluminum alloy, and the entire surface or a part of the surface is formed. A hard alumite treatment is applied to the inner periphery of the synchronizer ring body, and a metal ring having higher strength than the aluminum alloy is fixed to the inner periphery of the synchronizer ring body. Since a surface is provided and a lining is attached to the tapered surface, even when molding with an aluminum alloy having a small specific gravity, a metal ring having high strength is fixed to the inner peripheral portion, so that the tapered surface is formed. High strength and rigidity are advantageous for various use conditions, and moreover, it is necessary to attach a lining to the tapered inner diameter surface of the annular body. , Synchronizer rings are provided which can perform synchronization with a small pressing force by increasing the frictional transmission force.

According to a fourth aspect of the present invention, there is provided a synchronizer ring for use in a synchronous meshing device of an automobile transmission, wherein a synchronizer ring main body is formed by molding a synthetic resin, and the synchronizer ring main body is formed on an outer periphery of the synchronizer ring main body. A metal ring having a smaller coefficient of thermal expansion and higher strength than the synthetic resin is fitted, and a tapered surface facing the cone portion of the clutch gear to be synchronized is provided on the inner diameter of the synchronizer ring main body. Since the lining is attached, even if the weight is further reduced by molding with a synthetic resin having a lower specific gravity than the aluminum alloy, the outer periphery is backed up by a metal ring with a small thermal expansion coefficient and high strength. Therefore, thermal deformation is suppressed, which is advantageous for various use conditions, and since the lining is attached to the inner diameter tapered surface, Synchronizer ring which can perform synchronization with a small pressing force by increasing the friction transmission force is provided.

According to a fifth aspect of the present invention, there is provided a synchronizer ring used for a synchronous meshing device of an automobile transmission, wherein a synchronizer ring main body is formed by molding a synthetic resin, and an inner periphery of the synchronizer ring main body is formed. A metal annular body having strength higher than that of the synthetic resin is fixed, a tapered surface facing a cone portion of a clutch gear to be synchronized is provided on the inner diameter of the annular body, and a lining is attached to the tapered surface. Therefore, even if it is intended to further reduce the weight by molding with a synthetic resin having a lower specific gravity than an aluminum alloy, since a metal ring having high strength is fixed to the inner peripheral portion,
The strength and rigidity of the tapered surface are high, which is advantageous for various use conditions. In addition, since the lining is attached to the inner diameter tapered surface of the annular body, synchronization is performed with a small pressing force by increasing the friction transmitting force. A synchronizer ring is provided.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view showing a first embodiment of a synchronizer ring of the present invention.

FIG. 2 is a partial front view as viewed from an arrow A in FIG.

FIG. 3 is a partial perspective view of the outer annular body 12 alone in FIG. 1;

FIG. 4 is an enlarged sectional view showing a second embodiment and a fourth embodiment of the synchronizer ring of the present invention.

FIG. 5 is an enlarged sectional view showing a third embodiment and a fifth embodiment of the synchronizer ring of the present invention.

FIG. 6 is a sectional view of a synchronous meshing device of a transmission to which the synchronizer ring of the present invention is applied.

[Explanation of symbols]

 Reference Signs List 7 Synchronizer ring main body 7a Recess 7b Spline teeth 12 Outer annular body 12a Keyway 13 Synchronizer ring 17 Inner annular body 18 Lining

Claims (5)

[Claims] 1. A synchronizer ring used for a synchronous meshing device of an automobile transmission, wherein a synchronizer ring main body is formed from an aluminum alloy.
Hard anodized on the whole or part of its surface,
A synchronizer ring, wherein a metal ring having a smaller coefficient of thermal expansion and a higher strength than the aluminum alloy is fitted to an outer periphery of the synchronizer ring main body. 2. The synchronizer ring according to claim 1, wherein a lining is attached to a tapered inner diameter surface facing a cone portion of the clutch gear to be synchronized. 3. A synchronizer ring used for a synchronous meshing device of an automobile transmission, wherein a synchronizer ring main body is formed from an aluminum alloy.
Hard anodized on the whole or part of its surface,
A metal annular body having strength higher than that of the aluminum alloy is fixed to the inner periphery of the synchronizer ring main body, and a tapered surface facing the cone portion of the clutch gear to be synchronized is provided on the inner diameter of the annular body. A synchronizer ring characterized by attaching a lining to the synchronizer. 4. A synchronizer ring used for a synchronous meshing device of an automobile transmission, wherein a synchronizer ring main body is formed of a synthetic resin, and has a smaller coefficient of thermal expansion on the outer periphery of the synchronizer ring main body than the synthetic resin. A high-strength metal annular body is fitted, a tapered surface facing the cone of the clutch gear to be synchronized is provided on the inner diameter of the synchronizer ring main body, and a lining is attached to the tapered surface. Synchronizer ring. 5. A synchronizer ring used for a synchronous meshing device of an automobile transmission, wherein a synchronizer ring main body is formed of a synthetic resin, and a metal made of metal having higher strength than the synthetic resin is formed on an inner periphery of the synchronizer ring main body. A synchronizer ring, wherein a tapered surface facing a cone portion of a clutch gear to be synchronized is provided on an inner diameter of the annular body, and a lining is attached to the tapered surface.