KR980010031A - Synchronization device of a manual transmission for a vehicle - Google Patents

Abstract

When the shift lever is operated during shifting, the sleeve pushes the synchronizer key according to the direction of operation of the shift lever and selectively pushes the synchronizer ring disposed on both sides of the shift lever so that the inner surface of the synchronizer ring is closely contacted with the nose portion of the clutch gear And the inner surface of the sleeve is engaged with the gear portion of the synchronizer ring and the clutch gear to engage with the gear portion of the sleeve so as to perform shifting. A protrusion inserted into the groove formed on the inner surface of the sleeve and a protrusion formed on the inner side are formed on the outer side in order to facilitate the interaction between the sleeve and the key, A plurality of keys holding the grooves and the circular grooves of the keys are inserted into the grooves A hub having a plurality of grooves formed at equal intervals and having index-fixing grooves formed on both sides thereof, and an index-amount fixing protrusion And a synchronizer ring in which the synchronizer ring is formed.

Description

Synchronization device of a manual transmission for a vehicle

FIG. 1 is a half sectional view of a synchronizing apparatus according to the present invention. FIG.

FIG. 2 is a perspective view of a hub applied to the present invention. FIG.

FIG. 3 is a perspective view of a key and a spring applied to the present invention; FIG.

Fig. 4 is a view for explaining the operation of the present invention, in which (a) or (b) shows a synchronizer ring synchronizing a clutch gear, and (b) a synchronized clutch gear and a sleeve engaged.

FIG. 5 is a half sectional view of a conventional synchronizing device. FIG.

6 is a cross-sectional view taken along line A-A of FIG. 5;

[Industrial Applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a synchronizing apparatus for a manual transmission for a vehicle, and more particularly, to a synchronizing apparatus for a manual transmission for a vehicle which enables uniform pressure action on an outer circumference of a hub at regular intervals, To a synchronizing device for a manual transmission for a vehicle.

[0003]

BACKGROUND ART [0002] A transmission of a vehicle is a device for changing the output rotational speed with respect to the input rotational speed in transmitting the rotational power of the engine to the wheel, and mainly includes an automatic transmission and a manual transmission.

In the present invention, a manual transmission is used. In this manual transmission, there is a perturbation gear type, a constant bite type, and a synchronous type in accordance with the gear engagement method. Generally, in synchronization with the operation of the shift lever, The physical equation is mainly used.

As shown in FIGS. 5 and 6, the hub 106 is engaged with the spline 104 of the main spindle 102 so that the spindle 102 can rotate together with the hub 106 A plurality of grooves 108 are radially formed on the outer periphery of the hub 106 so that the synchronizer key 110 is disposed and the sleeve 112 is coupled to the outer side of the hub 112 so as to move in the axial direction.

The synchronizer key 110 is resiliently urged by the resilient member 114 and held in contact with the inner surface of the sleeve 112.

The elastic member 114 is formed as a ring having one opening, and is generally a ring spring.

The speed gears 116 and 118 disposed independently of the main shaft 102 on both sides of the sleeve 112 are integrally formed with the clutch gears 124 and 126 whose outer circumferential surfaces are formed by the coils 120 and 122 And the synchronizer rings 128 and 130 are disposed in the coaxial portions 120 and 122 thereof to cause friction by mutual contact during shifting.

The synchronizer rings 128 and 130 have a threaded portion formed on an inner circumferential surface thereof to increase the frictional force acting on the coil portions 120 and 122. In the slots 132 and 134 formed radially outwardly, The distal end portion of one synchronizer key 110 is positioned.

When the shift lever (not shown) is operated, the sleeve 112 is moved in accordance with the operating direction of the shift lever. At this time, the sleeve 112 The right end of the synchronizer key 110 is pushed to the side wall of the groove 134 of the synchronizer ring 130 by pushing the synchronizer key 110 hooked on the inner groove of the synchronizer key 110 to the right, .

In this state, as the sleeve 112 continues to move, the inner thread portion of the synchronizer ring 130 is closely contacted with the coil portion 122, so that the speed gear 118 is started to receive the rotational force due to the friction action. When the gear ring 130 and the speed gear 118 are synchronized, the gear portion of the synchronizer ring 130 and the clutch gear 126 is engaged with the inner gear portion of the sleeve 112 to transmit power.

[Problems to be solved by the present invention]

However, in the conventional manual transmission synchronizing apparatus, since the spring supporting the key interposed between the sleeve and the hub forms the opening, the transmission force is deteriorated at the time of shifting because each key can not support the uniform elastic force. Further, since the frictional area between the sleeve and the key is large, there is a disadvantage in that the transmission feeling is lowered during shifting.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus and a method for controlling the same, To thereby improve the shifting feeling during shifting.

[MEANS FOR SOLVING THE PROBLEM]

In order to achieve the above-mentioned object, the synchronizing apparatus of the present invention is characterized in that, when the shift lever is operated at the time of shifting, the sleeve pushes the synchronizer key according to the operating direction of the shift lever and the synchronizer ring disposed on both sides thereof So that the inner surface of the synchronizer ring is brought into close contact with the nose portion of the clutch gear to perform synchronous action by friction action and the inner surface portion of the sleeve is engaged with the gear portion of the synchronizer ring and the clutch gear with the synchronous action thereof, A plurality of keys each having a protrusion inserted into a groove formed on an inner surface of a sleeve and a circular groove formed on an inner side of the sleeve, a plurality of coil springs inserted and protruded into the circular groove of the key, A plurality of grooves in which the key and the coil spring are interposed are formed at equal intervals, By including the ring index amount fixing protrusion is formed to be mounted on the outer peripheral portion and the hub is indexed amount of fixing grooves is formed on the indexed amount of the fixing groove of the hub and provides a synchronization device for a vehicle comprising a manual transmission.

The projection of the key is formed in a hemispherical shape.

[Action]

As described above, when the sleeve is moved due to the movement of the shift lever, the force acts in the lateral direction and the radial direction on the inner surface of the sleeve and the contact portion of the key, And the synchronizer ring and the clutch gear are synchronized with each other at the same time.

When the sleeve is subsequently moved, the clutch gear is synchronized with the synchronized clutch gear. Since the key is interposed between the sleeve and the hub at equal intervals, the respective keys are supported by independent elastic members. .

Example

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a manual transmission synchronizing apparatus according to the present embodiment. The reference numeral 1 is connected to a clutch (not shown) for interrupting transmission of a driving force of an engine (not shown) to a transmission, And is referred to as a main shaft 2.

A spline 40 is formed on one side of the main shaft 2 and a hub 6 is mounted on the spline 4. An elastic member 10 interposed in a groove 8 formed on the outer periphery of the hub 6 The sleeve 12 can be slid in the axial direction while the synchronizer key 14 (hereinafter referred to as key) is operated.

Speed gears 16 and 18 are mounted on the main shaft 2 on both sides of the hub 6 on which the sleeve 12 is mounted together with the bearings 20 and 22 so as to be freely rotatable ).

A clutch gear 24 is provided between the speed gear 16 and the hub 6. The clutch gear 24 may be formed integrally with the speed gear 16 but is welded in this embodiment .

The clutch gear 24 forms a coil portion 26. The coil portion 26 is rotatable together with the synchronizer ring 28 so that the key gear 14 is rotated by a synchronizer Since the key portion 14 is spaced apart or closely attached to the friction portion 30 of the synchronizer ring 28 that receives the pushing force at a small interval, Is selectively separated or synchronized with the friction portion (30) of the ring (28).

The key 14 for synchronizing the synchronizer ring 28 and the clutch gear 24 has a groove 8 formed at equal intervals on the outer periphery of the hub 6 as shown in Figs. 1 and 2, The protruding portion inserted into the groove formed on the inner surface of the sleeve 12 is formed on the outer side.

The hub 6 is formed with an index amount fixing groove 32 in which both sides of a portion where the groove 8 is formed are opened wider than the groove 8 in order to facilitate mounting of the key 14 do.

3, coil springs having the same elastic force are used, and one end of the elastic member 10 is formed on one side of the key 14 Is inserted into the groove.

The protrusion of the hemisphere is formed to further reduce the area of the surface of the key (14) that contacts the sleeve (12).

The synchronizer ring 28 is formed with an index amount fixing protrusion 34 that can be inserted into the index amount fixing groove 32 at the outer periphery thereof.

4, when the operation force of the shift lever of the driver is transmitted to the sleeve 12, the sleeve 12 is rotated in the direction of the rotation of the elastic member 10 While pushing the key 14, the slide advances in the axial direction while overcoming the intellectual force.

At this time, the elastic member 10 elastically supporting each key 14 supports the key 14 with an equal elastic force. The key 14 has a small friction between the sleeve 12 and the key 14 It easily acts in the axial direction and the radial direction when coming out of the groove formed in the inner surface of the sleeve 12 regardless of the area.

The friction portion 30 of the synchronizer ring 28 and the coil portion 26 of the clutch gear 24 are synchronized with each other.

Subsequently, as shown in FIG. 4 (B), the sleeve 12 passes through the synchronizer ring 28 and engages with the clutch gear 24.

The power transmitted to the main shaft 2 is transmitted to the other speed gear meshed with the output shaft through the hub 6 → the sleeve 12 → the clutch gear 24 → the speed gear 16.

[Effects of the Invention]

In the manual transmission synchronizer according to the present invention, since the keys interposed between the sleeve and the hub are supported by independent elastic members, and the respective keys are elastically supported and supported at a uniform pressure, So that the transmission feeling can be improved.

In addition, since the projecting portion of the key is hemispherical and the area of contact with the inner surface of the sleeve is reduced, the shift feeling is improved while performing the function of the key during shifting.

Claims (2)

A plurality of keys each having a protrusion inserted into a groove formed on the inner surface of the sleeve, a plurality of keys having a circular groove formed in the inner side, and a plurality of coil springs inserted into the circular groove of the key, And an index amount fixing protrusion attached to the index fixing groove of the hub at an outer periphery of the hub, wherein a plurality of grooves having the key and the coil spring are formed at equal intervals and the index amount fixing grooves are formed on both sides, And a synchronizer ring which is formed on the outer circumferential surface of the synchronizer ring. The automatic transmission synchronization apparatus for an automobile according to claim 1, wherein the projection of the key is hemispherical. ※ Note: It is disclosed by the contents of the first application.