KR101487656B1 - Synchronizing gear for transmission - Google Patents

Abstract

A synchronizing gear for a transmission is disclosed. The synchronizing gear for a transmission includes: an inner ring formed in a ring shape, and having a first friction portion formed along the inner circumference; a middle ring formed in a ring shape outside the inner ring, having a second friction portion on the inside facing the outer surface of the inner ring, and having a third friction portion formed along the outer circumference; and a synchroring formed in a ring shape outside the middle ring, and provided with an outer gear engaging with a moving sleeve.

Description

[0001] SYNCHRONIZING GEAR FOR TRANSMISSION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronous gear for a transmission, and more particularly, to a synchronous gear for a transmission having improved mechanical properties and durability by coupling of a clad metal.

Generally, a manual transmission includes a selection gear type that is configured so that the gears selected by the operation of the shift lever are engaged with each other, and a continuously-engaging type in which the gears on the main shaft and the gears on the subsidiary shaft are always engaged.

The normally engaged type is classified into a dog clutch type using a clutch gear according to a power transmission system and a synchromesh type in which a sleeve is used instead of a clutch to facilitate engagement between the gears.

1 shows a synchronizing apparatus having a triple type synchronizing ring configuration having three friction surfaces as a normally-engaged manual transmission.

The illustrated synchronizing device comprises a sleeve 2 coupled with a key 3 on a hub 1 and a synchronizing gear 4 positioned on the sleeve 2 side from the clutch gear 5 side coupled to the power gear 6. [ It is an example of a synchronizing device.

The synchronizing gear 4 is constituted by an inner ring 4a, a middle ring 4b and a synchronizing ring 4c which are sequentially positioned with respect to the clutch gear 5 and the number of friction surfaces formed by the synchronizing ring 4c It is divided into single, double and triple type. The triple type means that there are three friction surfaces.

The synchronizing device is provided with a detent ball 10 further between the key 3 and the sleeve 2. The detent ball 10 has a function of preventing the tilting of the key 3 in the synchronization function according to the shift, It improves the situation and serves to achieve a more stable synchronization than when it is not applied.

The sleeve 2 is moved toward the synchronizing gear 4 which applies a frictional force to the clutch gear 5 with the pre-synchronizing action of the key 3, The gear 4 and the clutch gear 5 are synchronized to transmit the power to the power gear 6 side.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 2011-0109588 (published on October 10, 2011, entitled Synchronous Coupling Mechanism of Transmission).

Conventionally, since the middle ring used for the synchronous gear is formed by using copper, the thickness of the middle ring is thickened and the mechanical properties such as strength are lowered. Therefore, there is a need for improvement.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a synchronizing gear for a transmission having an improved mechanical property and durability by bonding a clad metal.

A synchronizing gear for a transmission according to the present invention comprises: an inner ring formed in a ring shape and having a first frictional portion formed along an inner circumference thereof; an inner ring formed in a ring shape on the outer side of the inner ring, And a synchronizing ring having a second friction portion formed along the outer circumference thereof and a third gear formed with a third friction portion and a ring gear formed outside the middle ring and having an external gear meshed with the moved sleeve.

The inner ring preferably includes an inner ring body formed in a ring shape and a plurality of first protrusions protruding from one side of the inner ring body and coupled to the synchro main body.

Preferably, the first frictional portion includes a first clad metal fixed along the inner circumference of the inner ring body.

It is preferable that the first clad metal is fixed by press-pressing in a state of being in contact with the inner side of the inner ring body.

The first rubbing portion may further include a first oil guide portion for forming a plurality of first oil grooves on a surface of the first clad metal.

The middle ring preferably includes a middle ring body formed in a ring shape and a second protrusion protruded from the middle ring body and coupled to the speed change gear.

The second frictional portion may include a second clad metal fixed along the inner circumference of the middle ring body and the third frictional portion may include a third clad metal fixed along the outer circumference of the middle ring body.

Preferably, the second clad metal is fixed by press-pressing in a state of being in contact with the inner side of the middle ring body, and the third clad metal is fixed by press-pressing in contact with the outer side of the middle ring body.

It is preferable that the second clad metal and the third clad metal have a plate shape in which copper is bonded to both sides of the stainless steel used as a base material.

The second friction portion further includes a second oil guide portion forming a plurality of second oil grooves on the surface of the second clad metal, and the third friction portion forms a plurality of third oil grooves on the surface of the third clad metal And a third oil guide portion.

Preferably, the synchronizing ring includes a ring-shaped synchronizing ring body and an inner ring-shaped protrusion protruding inward from the first ring-shaped protrusion.

Since the second friction portion and the third friction portion using the clad metal are provided on both sides of the middle ring body according to the present invention, the mechanical properties and durability of the middle ring are improved, and the frictional force is increased, Synchronization of gears can be done quickly.

1 is a view showing a state where a synchronizing device of a conventional manual transmission is installed.
2 is a schematic view illustrating a state in which a synchronizing gear for a transmission is installed according to an embodiment of the present invention.
3 is a perspective view schematically showing a synchronizing gear for a transmission according to an embodiment of the present invention.
4 is a perspective view schematically showing a state in which an inner ring and a middle ring are separated from each other in a synchronizing ring according to an embodiment of the present invention.
5 is an exploded perspective view of a synchronizing gear for a transmission according to an embodiment of the present invention.
6 is a schematic cross-sectional view of a second clad metal according to an embodiment of the present invention.

Hereinafter, a synchronizing gear for a transmission according to an embodiment of the present invention will be described with reference to the accompanying drawings. For convenience of explanation, a synchronous gear for a transmission provided in a manual transmission will be described as an example. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

Further, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 2 is a schematic view showing a state in which a synchronizing gear for a transmission according to an embodiment of the present invention is installed, FIG. 3 is a perspective view schematically showing a synchronizing gear for a transmission according to an embodiment of the present invention, 4 is a perspective view schematically showing a state in which an inner ring and a middle ring are separated from each other in a synchronizing ring according to an embodiment of the present invention, FIG. 5 is an exploded perspective view of a synchronizing gear for a transmission according to an embodiment of the present invention, 6 is a schematic cross-sectional view of a second clad metal according to an embodiment of the present invention.

2 to 5, a synchronizing gear 20 for a transmission according to an embodiment of the present invention is formed in a ring shape, and has a first friction portion 37 formed along an inner circumference thereof, A second frictional portion 44 formed on the outer side of the inner ring 30 in a ring shape and facing the outer surface of the inner ring 30 and a third frictional portion 44 formed along the outer circumference, And a synchro ring 60 having an intermediate gear 40 on which the intermediate gear 50 is formed and an external gear 68 formed on the outside of the intermediate ring 40 in the form of a ring and meshing with a sleeve to be moved.

The transmission shaft 74 provided in the synchronizing device in which the synchronization gear 20 for the transmission is installed rotates at a different rotation speed than the first speed change stage gear 82 and the second speed change stage gear 84. [

The synchro main body 72 and the engaging portion 73 rotate together with the transmission shaft 74 and the spring 78 is wound in the groove provided in the upper side of the synchro main body 72 (76) is inserted.

A slide ring 80 is connected to the upper side of the pin 76 and a slide sleeve 70 is provided on the upper side of the slide ring 80 to be movable left and right.

A synchronizing gear 20 for the transmission is provided on both sides of the pin 76 and the synchronizing gear 20 for the transmission is operated by the movement of the slide sleeve 70.

When the slide sleeve 70 is moved in the direction in which the first speed change stage gear 82 is installed the synchronizing gear 20 for the transmission is operated to change the rotation speed of the first speed change stage gear 82 and the transmission shaft 74 The same.

When the slide sleeve 70 is moved in the direction in which the first speed change stage gear 84 or the second speed change stage gear 84 is installed, the synchronizing gear 20 for the transmission is operated to rotate the second speed change stage gear 84 and the rotation shaft 74 .

The synchronizing gear 20 for a transmission according to one embodiment includes an inner ring 30, a middle ring 40, and a synchronizing ring 60.

The inner ring 30 is formed in a ring shape and can be formed into various shapes and materials within a technical concept in which the first rubbing portion 37 is formed along the inner periphery.

The inner ring 30 according to one embodiment includes an inner ring body 32, an outer inclined surface 33, a first protrusion 35, a first groove 36, and a first friction portion 37.

The inner ring body 32 forming the body of the inner ring 30 is formed in a ring shape. The inner ring body 32 is formed of a metal material and formed into a pipe shape.

The first projection 35 protrudes from one side of the inner ring body 32 (refer to FIG. 5 as a reference lower side) and is coupled to the synchro main body 72. A plurality of first projections 35 are provided along the lower periphery of the inner ring body 32 and are engaged with both sides of the inner projection 64 provided in the synchronizing ring 60 and rotated together with the synchronizing ring 60 .

The first grooves 36 are formed on both sides of the inner protrusion 64 so that the movement of oil moving on the inner and outer sides of the inner ring 30 through the first grooves 36 can be performed more smoothly.

The first friction portion 37 includes the first oil guide portion 31 and the first clad metal 38 and is fixed along the inner circumference of the inner ring body 32.

The first clad metal 38 is fixed by press-pressing in a state in contact with the inner side of the inner ring body 32.

The first clad metal 38 includes a material of a friction component, and the material of the friction component is pressed on both sides of the base material.

The first clad metal 38 is pressed in the form of a thin plate and the first clad metal 38 presses under pressure in contact with the inner surface of the inner ring body 32, And is fixed in contact with the ring body (32).

The first oil guide portion 31 forms a plurality of first oil grooves 39 on the surface of the first clad metal 38 so that the oil can smoothly move along the first oil groove 39 .

Since the first oil groove 39 is formed in the height direction of the inner ring body 32 (the upper and lower directions in FIG. 5), it is easy to move the oil flowing in the inner ring body 32 up and down .

The outer inclined surface (33) of the inner ring (30) is inclined downward toward the center of the inner ring (30).

The intermediate ring 40 is formed on the outer side of the inner ring 30 in a ring shape and is rotated at a rotation speed different from that of the inner ring 30 in a state where the intermediate ring 40 is spaced apart from the inner ring 30.

The middle ring 40 has a second frictional portion 44 formed on the inner side facing the outer surface of the inner ring 30 and a third frictional portion 50 formed along the outer perimeter And may be formed in various shapes.

The middle ring 40 according to one embodiment includes a middle ring body 41 and a second projection 42 and a second groove 43 and a second friction portion 44 and a third friction portion 50 .

The intermediate ring body 41 forming the body of the intermediate ring 40 is formed in a ring shape. The intermediate ring body 41 is formed of a metal material and formed into a pipe shape.

The first protrusions 35 of the inner ring 30 and the second protrusions 42 of the intermediate ring 40 are protruded in directions opposite to each other It is the opposite.

When the clutch body 90 is fixed to the first speed change stage gear 82, the second protrusion 42 of the middle ring 40 is inserted and fixed to the inside of the clutch body 90, The second projection 42 is rotated together with the second projection 82.

The second protrusion 42 protruding toward the second speed change stage gear 84 is also inserted into the clutch body 90 rotating together with the second speed change stage gear 84, And the second speed change stage gear 84 rotate together.

The second protrusion 42 may be formed in various shapes within a technical concept that protrudes from the middle ring body 41 and is coupled to the first speed change stage gear 82 or the second speed change stage gear 84.

The second grooves 43 are formed on both sides of the second protrusions 42 so that the oil moved to the inside and the outside of the middle ring 40 is moved through the second grooves 43.

The second friction portion 44 is fixed along the inner circumference of the middle ring body 41 and includes a second clad metal 45 and a second oil guide portion 49.

The second clad metal (45) is pressed and pressed in contact with the inside of the intermediate ring body (41).

The second clad metal 45 includes a material of a friction component, and a material of a friction component is pressed on both sides of the base material.

As shown in FIG. 6, the second clad metal 45 according to one embodiment is formed in a plate shape in which the copper 47 is bonded to both sides of the stainless steel 46 used as a base material.

Copper may be used instead of copper 47 on both sides of the stainless steel 46 used as a base material and various materials may be bonded to both sides of the stainless steel 46 in order to increase frictional force.

The third clad metal 52 has the same structure as the second clad metal 45 and is fixed to the outside of the middle ring body 41.

2 to 5, the second clad metal 45 is compressed in the form of a thin plate. When the second clad metal 45 is in contact with the inner surface of the middle ring body 41, So that the second clad metal 45 is fixed in contact with the middle ring body 41.

The second oil guide portion 49 forms a plurality of second oil grooves 48 on the surface of the second clad metal 45 so that the oil can smoothly move along the second oil groove 48 .

Since the second oil groove 48 is formed in the height direction of the middle ring body 41 in the vertical direction in FIG. 5, it is easy to move the oil flowing inside the middle ring body 41 up and down .

The intermediate ring body 41 is also formed so as to be inclined at an angle corresponding to the outer inclined surface 33 of the inner ring 30. [ The middle ring body 41 is formed in a shape extending outward from the lower side toward the upper side and the second clad metal 45 is provided in contact with the outer inclined surface 33 of the inner ring 30.

The third friction portion 50 provided along the outer circumference of the middle ring body 41 includes a third clad metal 52 and a third oil guide portion 56.

The third clad metal 52 is fixed along the outer periphery of the inner ring body 32 and is fixed by press-pressing in a state of being in contact with the outer side of the inner ring body 32.

Since the third oil guide 56 has a plurality of third oil grooves 54 on the surface of the third clad metal 52, the oil moving along the outer side of the middle ring 40 can be easily moved have.

The first clad metal 38, the second clad metal 45, and the third clad metal 52 according to an embodiment of the present invention use the same clad metal, and thus a detailed description thereof will be omitted.

The synchro ring 60 may be formed in a ring shape on the outer side of the middle ring 40 and may be formed in various shapes within the technical idea in which the outer gear 68 engaged with the moving sleeve is provided.

The synchro ring 60 according to one embodiment includes a synchro body 62, an inner inclined surface 63, an inner protrusion 64, a protrusion protrusion 66, and an outer gear 68.

The synchro body 62 formed of a metal is formed in a ring shape and an inner inclined surface 63 is formed inside the synchro body 62.

The inner inclined surface (63) forms an inclined surface having a shape gradually expanding outward from the lower side toward the upper side.

The inner inclined face 33 and the inner inclined face 63 are hardened to have a smooth surface and the inner protrusion 64 and the protrusion protrusion 66 are connected to the inside of the synchro body 62. [

Since the first protrusion 35 of the inner ring 30 is located on both sides of the inner protrusion 64 protruding from the lower side of the synchro body 62 toward the center of the synchro body 62, The first projection 35 is also rotated.

A protrusion protrusion 66 having a short length protruding from the inner protrusion 64 is provided between the inner protrusions 64.

An outer gear 68 is provided along the outer periphery of the body of the synchronizing ring 60 and the outer gear 68 is gear connected to the lower side of the slide sleeve 70 when the slide sleeve 70 is moved.

It is preferable that the synchro ring 60 includes a ring-shaped synchro ring body 60 and an inner protrusion 64 protruding inward from the body of the synchro ring 60 and positioned between the first protrusions 35 Do.

Hereinafter, the operating state of the synchronizing gear 20 for a transmission according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The slide sleeve 70 is moved by operating the shift lever of the manual transmission. Assuming that the slide sleeve 70 is moved in the direction toward the first speed change gear 82, the slide ring 80 is also moved by the movement of the slide sleeve 70 to press the synchro ring 60.

The synchro ring 60 and the inner ring 30 are rotated together with the transmission shaft 74 and the intermediate ring 40 is rotated together with the first speed change stage gear 82, So that the synchro ring 60 and the intermediate ring 40 abut against each other to generate frictional force.

The third frictional portion 50 of the middle ring 40 contacts the inner inclined surface 63 of the synchro ring 60 to generate a frictional force and the second frictional portion 44 of the intermediate ring 40 contacts the inner inclined surface 63 of the inner ring 30 to contact the outer inclined surface 33, thereby generating a frictional force.

The synchro ring 60 and the intermediate ring 40 are rotated together by the frictional force generated by the intermediate ring 40 so that the transmission shaft 74 and the first speed change gear 82 are also rotated.

The synchronization of the transmission shaft 74 and the first speed change stage gear 82 is completed because the slide sleeve 70 is further moved and connected to the clutch body 90 rotating together with the first speed change stage gear 82 do.

As described above, according to the present invention, since the second friction portion 44 and the third friction portion 50 using clad metal are provided on both sides of the middle ring body 41, the mechanical properties of the intermediate ring 40 Durability can be improved.

In addition, since the thickness of the intermediate ring 40 is reduced by forming the intermediate ring body 41 into a metal material having excellent mechanical properties, the size of the synchronizer gear 20 for the transmission can be reduced.

Further, since the clad metal including the copper 47 or copper is attached to the inside and outside of the middle ring body 41 to form the friction portion, the synchronization of the transmission shaft 74 and the speed change gear can be performed quickly by increasing the frictional force .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined by the appended claims. will be. In addition, although a synchronous gear for a transmission provided in a manual transmission has been described as an example, the present invention is merely an example, and a synchronous gear for a transmission according to the present invention can be applied to other devices in which power is shifted. Accordingly, the true scope of the present invention should be determined by the following claims.

20: Synchronous gear for transmission
30: Inner ring 31: First oil guide
32: inner ring body 33: outer inclined surface
35: first projection 36: first groove
37: first friction portion 38: first clad metal
39: first oil groove 40: middle ring
41: Middle ring body 42: Second projection
43: second groove 44: second friction portion
45: second clad metal 46: stainless steel
47: copper 48: second oil groove
49: second oil guide portion 50: third friction portion
52: third clad metal 54: third oil groove
60: Synchro ring 62: Synchro body
63: inner inclined surface 64: inner projection
66: projecting projection 68: outer gear
70: slide sleeve 72: synchro main body
73: engaging portion 74:
76: pin 78: spring
80: Slide ring 82: First speed change gear
84: Second speed change gear 90: Clutch body

Claims (11)

An inner ring formed in a ring shape and having a first friction portion formed along an inner circumference thereof;
A middle ring formed on the outer side of the inner ring and having a second frictional portion formed on the inner side facing the outer side surface of the inner ring and having a third frictional portion along the outer perimeter; And
And a synchro ring formed in a ring shape on the outside of the middle ring and having an external gear meshing with a moving sleeve,
The inner ring includes an inner ring body formed in a ring shape; And
And a plurality of first projections protruding from one side of the inner ring body and coupled to the synchro main body,
The middle ring includes: a middle ring body formed in a ring shape; And
And a second projection projecting from the intermediate ring body and coupled to the speed change gear,
The second friction portion includes a second clad metal fixed along an inner circumference of the middle ring body,
And the third friction portion includes a third clad metal fixed along an outer circumference of the middle ring body.
delete The method according to claim 1,
Wherein the first friction portion includes a first clad metal fixed along the inner circumference of the inner ring body.
The method of claim 3,
Wherein the first clad metal is fixed by press-pressing in a state of being in contact with the inner side of the inner ring body.
The method of claim 3,
Wherein the first friction portion further comprises a first oil guide portion forming a plurality of first oil grooves on the surface of the first clad metal.
delete delete The method according to claim 1,
The second clad metal is fixed by press-pressing in a state of being in contact with the inside of the middle ring body,
And the third clad metal is fixed by press-pressing in a state of being in contact with the outer side of the middle ring body.
9. The method of claim 8,
Wherein the second clad metal and the third clad metal are plate-shaped in which copper is bonded to both sides of stainless steel used as a base material.
The method according to claim 1,
The second friction portion further includes a second oil guide portion forming a plurality of second oil grooves on a surface of the second clad metal,
Wherein the third friction portion further comprises a third oil guide portion for forming a plurality of third oil grooves on the surface of the third clad metal.
The method according to claim 1,
The synchronizing ring includes: a synchronizing body formed in a ring shape; And
And an inner protrusion protruding inwardly of the synchronizing body and positioned between the first protrusions.

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