KR101629024B1

KR101629024B1 - Oil lubrication structure of synchronizing device for manual transmission

Info

Publication number: KR101629024B1
Application number: KR1020100029377A
Authority: KR
Inventors: 유현수
Original assignee: 현대다이모스(주)
Priority date: 2010-03-31
Filing date: 2010-03-31
Publication date: 2016-06-09
Also published as: KR20110109588A

Abstract

The present invention is characterized in that the clutch gear 5 coupled to the power gear 6 forms a wide oil groove 20 in the circumferential direction on the cone side surface portion 5a located toward the hub 1, The oil from the side of the needle bearing 7 flows toward the synchro-gear 4 side by the oil groove 6a and the oil groove 6b formed in the circumferential direction on the power gear 6, It forms a smooth oil flow.
Therefore, the smooth oil film formation between the hub 1 side and the clutch gear 5 can be continued so that the frictional resistance can be reduced even if the unidirectional movement occurs due to thrust during driving.
The drag torque is lowered by the oil film formation as described above, thereby minimizing the increase of the operating force and the deterioration of operation feeling (double sticking feeling) during shifting, and the shift feeling and durability are greatly enhanced.

Description

Technical Field [0001] The present invention relates to an oil lubrication structure for a manual transmission,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual transmission synchronizer, and more particularly, to an oil lubrication structure of a manual transmission synchronizer capable of inducing smooth oil flow on a clutch gear side located in an oil supply path.

Generally, a manual transmission has 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 synchronous gear 4 located on the side of the sleeve 2 on the side of the clutch gear 5 coupled to the power gear 6 Is an example of a configured synchronization device.

The synchro-gear 4 is composed of an inner ring 4a, a middle ring 4b and a synchro ring 4c sequentially positioned with respect to the clutch gear 5, and the friction surface formed by the synchro ring 4c The number is divided into single, double and triple types.

The triple type means that there are three friction surfaces.

The synchronizing device is provided with a detent ball 10 between the key 3 and the sleeve 2. The detent ball 10 is used to prevent the key 3 from tilting during the synchronization function according to the shift, It improves the jamming situation and functions to realize a stable synchronization function as compared with the case where it is not applied.

The sleeve 2 is moved toward the synchro-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.

In particular, the hub 1 and the clutch gear 5 have a drag torque which is a force in the opposite direction of the rotational force due to the friction force due to the relative movement, I can not help it.

The drag torque as described above in the manual transmission causes frictional heat and power loss as well as an increase in the operating force during the shifting operation and a deterioration in the operability (doubling feeling).

Various methods can be applied to solve this problem. For example, when the friction occurring at the side of the synchro ring 4c is minimized, shift feeling and durability can be increased.

Generally, the lubricating structure of the synchronizing device has a structure in which oil flows into the synchro-gear 4 from the needle bearing 7 side after the oil flows through the power gear 6.

However, the above-described lubrication structure has a side in which the oil supply path leading to the synchro-gear 4 due to the clutch gear 5 is not formed smoothly.

For example, even if the endplay value is applied to the clutch gear 5, it is possible to increase the frictional resistance of the hub 1 to the side of the clutch gear 5, It may not be possible to form a smooth oil flow in the path K.

If oil flow is not smooth on the side of the clutch gear 5 as described above, oil film formation between the clutch gear 5 and the hub 1 can not be smoothly performed and the frictional resistance is increased, The supply will not be smooth.

Such a state is inevitably accompanied by an increase in drag torque which causes an increase in the operating force and a drop in the operability (double gripping feeling) in shifting, as well as shift feeling and durability.

Accordingly, it is an object of the present invention to provide an oil groove formed in a clutch gear disposed in an oil supply path extending from a needle bearing of a power gear to a synchromesh, So that the oil flow to the clutch gear can be smoothly maintained even if the one-sided movement is caused by the thrust during driving.

In order to achieve the above object, according to the present invention, there is provided a synchronization device for a manual interlocking type manual transmission having a synchro-gear for synchronizing a clutch gear with a frictional force,

And the clutch gear further includes a wide oil groove formed at a position coinciding with the oil groove of the power gear through which the oil from the needle bearing side flows.

The oil groove and the wide oil groove are formed in a circumferential direction.

The oil groove has a pair of spaced apart widths, and the wide oil groove has a width size including a width of the oil groove.

The oil groove and the wide oil groove are formed toward the hub.

According to the present invention, since the oil groove formed on the clutch gear side of the power gear coincides with the power gear side to maintain smooth oil flow, the formation of the oil film smoothly with the hub side is maintained and the oil supply to the synchro- .

Since drag torque is lowered due to a reduction in frictional resistance between the clutch gear and the hub due to the formation of a smooth oil film, it is possible to minimize the phenomenon of increase in operation force and deterioration in operation feeling (double sticking feeling) And the durability can be greatly enhanced.

FIG. 1 is a configuration diagram of a conventional manual gearbox synchronizing apparatus. FIG. 2 (a) and FIG. 2 (b) are views of a clutch gear and a power gear side to which an oil lubrication structure according to the present invention is applied, 3 is a functional diagram of a synchronizing apparatus to which an oil lubricating structure according to the present invention is applied.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which illustrate exemplary embodiments of the present invention. The present invention is not limited to these embodiments.

1, which shows a conventional structure, a sleeve 2 coupled with a key 3 to a hub 1 in a normally-engaged manual transmission, a clutch gear 5 coupled to a power gear 6, And a synchronous gear 4 positioned on the side of the sleeve 2 on the side of the sleeve 3 and a detent ball 10 between the key 3 and the sleeve 2.

The power gear 6 is coupled to the main shaft via a needle bearing 7 and the needle bearing 7 functions to supply the oil supplied from the main shaft to the gear 4 via the synchromesh.

In the present embodiment, an oil lubrication structure capable of smoothly forming and maintaining the oil flow path of the synchronizing device is applied, and the oil lubrication structure is implemented using the clutch gear 5 side.

2 (A) shows a clutch gear and a power gear side configuration to which the oil lubrication structure according to the embodiment is applied.

As shown, the clutch gear 5 and the power gear 6 are coupled to each other in a gear, and the power gear 6 is provided with a pair of oil grooves (not shown) spaced apart from each other 6a and 6b are formed in the circumferential direction.

The pair of oil grooves 6a and 6b are formed on the upper and lower sides with respect to the axial center, respectively.

In addition, the clutch gear 5 according to the present embodiment forms a wide oil groove 20 in the circumferential direction on the cone side surface portion 5a positioned toward the hub 1, and the wide oil groove 20 has a cone- (5a) is cut to a predetermined depth.

The wide oil grooves 20 are also formed on the upper and lower portions with respect to the shaft center.

In this embodiment, as shown in Fig. 2 (B), the width size A of the wide oil groove 20 is made to coincide with the width of the pair of oil grooves 6a, 6b of the power gear 6 , Or a width interval.

Fig. 3 shows a functional diagram of a synchronizing apparatus to which an oil lubrication structure according to the present invention is applied.

As shown in the figure, when the synchronization according to the shift is performed, the synchronization of the key 3 and the synchronization of the sleeve 2 together with the synchro- The synchronous gear 4 and the clutch gear 5 are synchronized with each other and the power is transmitted to the power gear 6 side.

The detent ball 10 provided between the key 3 and the sleeve 2 serves to prevent the key 3 from tilting and to improve the locking condition at the time of synchronization.

The above synchronization operation is the same as that of the conventional synchronization device described in the present invention.

In addition, in this embodiment, the action of greatly reducing the drag torque due to the frictional force between the hub 1 and the clutch gear 5 is realized, which is caused by the lubricating structure applied to the clutch gear 5. [

The oil flowing from the side of the needle bearing 7 toward the power gear 6 flows into the circumferential oil grooves 6a and 6b of the power gear 6, (20) and supplied to the synchro-gear (4).

In the present embodiment, the oil flow remains unclogged on the clutch gear 5 side, and even if one side movement is caused by the thrust during driving, the oil flow can be stably maintained between the hub 1 and the clutch gear 5 .

This is because the wide oil groove 20 forming the oil flow K on the side of the clutch gear 5 coincides with the pair of oil grooves 6a and 6b on the side of the power gear 6, Has a width size A that accommodates the pair of oil grooves 6a and 6b.

This stable oil film formation reduces the drag torque by drastically reducing the drag torque, which minimizes the increase of the operating force and deterioration of operation feeling (double sticking feeling) during shifting, and the shift feel and durability are greatly increased .

1: hub 2: sleeve
3: Key 4: Synchro Gear
4a: Inner ring 4b: Middle ring
4c: outer ring 5: clutch gear
5a: cone side portion 6: power gear
6a, 6b: Oil groove 10: Detent ball
20: Wide oil groove

Claims

In a synchronizer of a continuously-engaging manual transmission having a synchro-gear for synchronizing with a clutch gear,
Wherein the clutch gear further includes a wide oil groove formed at a position coinciding with an oil groove of a power gear through which oil from the needle bearing side flows,
Wherein the oil groove is formed in the power gear so that the oil forms an oil film between the clutch gear and the hub, and the wide oil groove is formed by cutting out a cone side portion of the clutch gear
Wherein the oil lubricating structure of the manual transmission synchronizer is characterized in that the oil lubricating structure of the manual transmission synchronizer is provided.

The oil lubricating structure of claim 1, wherein the oil groove and the wide oil groove are formed in a circumferential direction.

The oil lubrication structure of claim 2, wherein the oil grooves are a pair of spaced apart from one another at a wide interval, and the wide oil groove has a width size including a width interval of the oil groove.

4. The oil lubricating structure of claim 3, wherein the oil groove and the wide oil groove are formed so as to face the hub.