JPS6258406B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a Warner type synchronizing mesh device used in an automobile transmission, and in particular, to simplify the device by integrating an insert and a spread spring that presses the insert in the radial direction. The present invention relates to a Warner type synchronized meshing device.

Conventionally, a warner type synchronizing mesh device used in a transmission of a small vehicle such as a passenger car has a synchro hub 2 fixed to a main shaft 1 by spline fitting, as shown in FIG. A coupling sleeve 4, which is moved in the axial direction by a shift fork 3, is fitted to the cut spline. Three notches are formed in the synchro hub 2 parallel to the main shaft 1, and a spread spring 5 is inserted into the notches. The insert member 6 is pressed in the radial direction by the insert member 6, and the insert member 6 is normally pressed by the spread spring 5 and engaged with the inner circumferential groove of the coupling sleeve 4. In addition, the synchro hub 2 and the transmission gears 7 on both sides rotatably inserted into the main shaft 1,
There is a balk ring (synchronized ring) between 8
9 and 10 are interposed, and when the coupling sleeve 4 is moved, for example, to the left by the shift fork 3, the insert member 6 receiving the tension of the spread spring 5 moves all the way, and the end face of the insert member 6 is bent. 9 toward the transmission gear 7 side, the conical sliding surface 15 of the balk ring 9 comes into contact with the cone sliding surface 13 of the clutch gear 11, which is formed integrally with the transmission gear 7, and friction torque is generated, causing the transmission gear 7 and The rotation of the Bork ring 9 is synchronized, and furthermore,
As the splines of the coupling sleeve 4 engage with the clutch gear 9a of the balk ring 9, synchronization between the transmission gear 7 and the coupling sleeve progresses through the balk ring 9, and the balk ring 9 is further pushed to achieve complete synchronization. Then, the insert member 6 is pushed down, the coupling sleeve 4 is engaged with the clutch gear 11, and the power of the main shaft 1 is transmitted to the transmission gear 7.

However, the conventional warner type synchronous meshing device has a synchro hub 2, a coupling sleeve 4,
Balk ring 9, 10, spread spring 5
and an insert member 6, which has the advantage that it is easy to change gears and does not cause shifting noise or damage to the gears, but it has fewer parts compared to, for example, pin-type synchronizers used in large vehicles. There were many, and the structure was complicated.

The present invention has been made in view of the above, and in order to reduce the number of parts and simplify the structure of a warner type synchronized meshing device, the insert member is formed with a sleeve engagement portion at the top and balk abutment on both sides. The purpose of the present invention is to solve the above-mentioned problems by eliminating the need for a spread spring by constructing a plate spring member having a bent shape with a hub abutting part formed at the lower part and which can be deformed by pressing in the radial direction. There is.

Hereinafter, the present invention will be explained based on the drawings.

FIG. 2 is an explanatory diagram showing an embodiment of the present invention in a half section in the axial direction.

First, to explain the configuration, 1 is a main shaft that fixes the synchro hub 2 by spline fitting.
The synchro hub 2 also has a spline cut on its outer periphery, and a coupling sleeve 4 is engaged with the outer periphery spline so as to be movable in the axial direction through a spline 4a formed on the inner periphery. In addition, the outer circumference of the synchro hub 2 is provided with three notches parallel to the axis, and in the three notches, there is a bent shape of a spring plate, which will be explained later. An insert member 20 is fitted therein, and in the illustrated state, the insert member 20 is engaged in the central groove of the spline 4a of the coupling sleeve 4.

Transmission gears 7 and 8 are rotatably inserted into the main shaft 1 on both sides of the synchro hub 2, and the transmission gears 7 and 8 are connected to the clutch gear 1 on the synchro hub 2 side.
1 and 12 are integrally formed, and a cone sliding surface 14 is formed on the end face of the clutch gears 11 and 12. Between each of the clutch gears 11 and 12 and the synchro hub 2, there is a conical sliding surface 1 that fits into the conical sliding surfaces 13 and 14 on the clutch gear side.
Balk rings (synchronized rings) 9 and 10 integrally equipped with 5 and 16 are interposed, and the balk rings 9 and 10 have clutch gears 11 and 12 on their outer peripheries.
Clutch gears 9a and 10a of the same pitch are integrally formed. In addition, there are three notches on the sides of the balk rings 9 and 10 into which the insert member 20 is fitted.
The insert member 20 is fitted into the balk rings 9 and 10 to restrict the movement of the balk rings 9 and 10 in the rotational direction. The relationship between the clutch gears 11 and 12 on the transmission gears 7 and 8 side, the balk rings 9 and 10, and the insert member 20 interposed between the synchro hub 2 and the coupling sleeve 4 is shown in a plan view on the transmission gear 8 side. As shown in FIG. 3, the end of the insert member 20 interposed between the synchro hub 2 and the coupling sleeve 4 fits into a notch 10b formed in the end surface of the balk ring 10. A notch 10 formed in the balk ring 10 restricts movement in the rotational direction.
The width of b is somewhat wider than the width of the insert member 20,
For this reason, the balk ring 10 can move left and right in the direction of rotation by an angle slightly smaller than a half-pitch of the spline 4a of the coupling sleeve 4 shown by diagonal lines.

Referring again to FIG. 2, a fork groove 18 is formed on the outer peripheral surface of the coupling sleeve 4, and the shift fork 3 fixed to the fork rod 17 is fitted into this fork groove 18, and the shift fork is moved by operating the shift lever. 3 moves the coupling sleeve 4 toward the transmission gear 8 or 7.

Note that the balk rings 9 and 10 are made of copper alloy in order to obtain wear resistance.
The conical sliding surfaces 15 and 16 of the gears 7 and 8 are provided with chevron-shaped threaded grooves so that appropriate frictional torque can be obtained when they come into contact with the conical sliding surfaces 13 and 14 on the transmission gears 7 and 8 side.

FIG. 4 shows the insert member 20 taken out from the embodiment of FIG. 2, and FIG. 5 shows a side view thereof.

That is, the insert member 20 has a thickness of 0.5 to 0.8
As shown in FIG. 4, a steel plate of 1.5 mm in diameter is provided with a sleeve engaging part 22 in contact with the upper part, a balk contact part 24 on the left and right sides, and a hub contact part 26 formed by bending the end of the spring plate in the lower part. It is made of a spring plate member integrally formed with the spring plate member, and after being bent into the shape shown in the figure, it is given the rigidity as a spring plate member by heat treatment, and maintains the shape shown in the figure against the left and right loads on the balk contact portion 24. , sleeve engaging portion 22 and hub abutting portion 2
6, the configuration is such that deformation occurs using the balk contact portion 24 side as a fulcrum.

Next, the action will be explained.

As is clear from the embodiment shown in FIG. 2, in the synchro meshing device of the present invention, an insert member 20 made as a spring plate member shown in FIGS. The elastic force of the insert member 20 itself pushes the upper sleeve engaging portion 22 into the groove at the center of the inner circumference of the coupling sleeve 4. Therefore, the spread spring that presses the insert member 20 in the radial direction Not used.

In this state, when the coupling sleeve 4 is moved toward the transmission gear 8 by, for example, the shift fork 3 due to the shift operation of the shift lever, the insert member 20 is fitted into the coupling sleeve 4 due to its spring action, so The ring sleeve 4 moves together with the balk contact surface 2 of the insert member 20 as shown in FIG.
4 pushes the balk ring 10, so that the conical sliding surface 16 of the balk ring 10 contacts the conical sliding surface 14 of the clutch gear 12. At this time, since the rotations of the clutch gear 12 and the balk ring 10 are not synchronized, the balk ring 10 rotates due to the rotation of the clutch gear 12, and the side end surface of the notch 10b of the balk ring 10 is brought into contact with the side surface of the insert member 20. The clutch gear 10a of the balk ring 10 and the spline 4a of the coupling sleeve 4 face each other, and they begin to come into contact with the inclined surfaces of the edges formed at the tooth ends of the clutch gear 10a and the spline 4a of the coupling sleeve 4. For this reason, the balk ring 10 also has a clutch gear 12.
The conical sliding surface 16 is pressed against the side.
A frictional torque is generated due to the contact between the clutch gear 12 and the cone sliding surface 14, and the clutch gear 12 and the coupling sleeve 4 rotate synchronously through the contact friction of the balk ring 10.

That is, the transmission gear 8 that integrally forms the clutch gear 12 starts to rotate synchronously with the coupling sleeve 4, and when the two are completely synchronized, the coupling sleeve 4 rotates with the insert member 2.
0 is pushed down to completely fit into the clutch gear 12 of the transmission gear 8 via the clutch gear 10a of the balk ring 10, and the power of the main shaft 1 is transmitted to the transmission gear 8. When the transmission gear 8 and the coupling sleeve 4 are completely synchronized, the insert member 20 can be pushed down when the clutch gear 12 is engaged because the insert member 20 has a spring structure that can be deformed in the radial direction. As the coupling sleeve 4 moves, the upper sleeve engaging portion 22 is pushed down, so that the coupling sleeve 4 can be easily engaged with the clutch gear 12 of the transmission gear 8.

Of course, when the coupling sleeve 4 that has been engaged with the clutch gear 12 of the transmission gear 8 is returned to the position shown in FIG. 2, the insert member 20 is pushed back to its original shape by the repulsive force of the insert member 20, and the upper The sleeve engaging portion 22 is fitted into the groove at the center of the inner circumference of the coupling sleeve 4.

FIG. 6 shows another embodiment of the insert member used in the present invention, and FIG. 7 shows a side view thereof.

In FIGS. 6 and 7, the insert member 30 has the end portion of the spring plate member formed with balk contact portions 34 on the left and right sides around the lower hub contact portion 36, and a sleeve engagement portion 32 on the upper portion. The insert member 20 has the same basic shape as the insert member 20 shown in the embodiment shown in FIG. This has the advantage that it is easy to deform when pressed down due to movement of the coupling sleeve during gear shifting.

FIG. 8 shows another embodiment of the insert member used in the synchronized meshing device of the present invention, and FIG. 9 shows a side view thereof.

In this embodiment, the leaf spring member is attached to the lower hub contact portion 4.
6 is bent upward to form a sleeve engaging portion 42 divided into left and right parts, and extending from this sleeve engaging portion 42 on both sides, a boke abutting portion 44 is integrally bent. Characteristics, 4th and 6th
The length of the leaf spring member forming the insert member 40 can be made shorter than in the illustrated embodiment.

In addition, the insert member 2 shown in FIGS. 4, 6, and 8
Among 0, 30, and 40, the insert member 20 shown in FIG. 4 has the best strength, but the insert members 30 and 40 having the shapes shown in FIGS. 6 and 8 also have a small transmitted torque. It is fully applicable to synchronous meshing devices of transmissions.

As described above, according to the present invention, an insert member whose structure is used in a warner type synchronized meshing device has a sleeve engaging part formed in the upper part, a balk contact part formed on both sides, and a hub part in the lower part. Since the insert member itself is made of a spring plate member that has a bent shape and is deformable in the radial direction and has a bending shape that forms a contact portion, it acts as a spread spring. The structure of the synchronous meshing device can be simplified by eliminating the need for the spread springs that were previously used.Also, by eliminating the need for spread springs and using an insert member made of a bent shape of a leaf spring member, the structure of the synchronizer can be significantly reduced. It is possible to achieve significant weight reduction, and also to reduce costs.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional explanatory diagram of a conventional device, Fig. 2 is a half-sectional view in the axial direction showing an embodiment of the present invention, and Fig. 3 is a partially extracted view of the synchronous meshing part of Fig. 2. A plan view, FIG. 4 is an explanatory diagram showing one embodiment of the insert member used in the present invention, FIG. 5 is a side view of FIG. 4, and FIG. 6 is an explanatory diagram showing another embodiment of the insert member. , FIG. 7 is a side view of FIG. 6, FIG. 8 is an explanatory diagram showing another embodiment of the insert member,
FIG. 9 is a side view of FIG. 8. 1... Main shaft, 2... Synchro hub,
3... Shift fork, 4... Coupling sleeve, 7, 8... Speed change gear, 9, 10... Balk ring, 11, 12... Clutch gear, 13, 1
4... Cone sliding surface, 15, 16... Cone sliding surface, 17... Fork rod, 18... Fork groove, 20, 30, 40... Insert member, 2
2, 32, 42... Sleeve engaging portion, 24, 3
4, 44... Balk contact portion, 26, 36, 46...
...Hub contact part.

Claims (1)

[Scope of Claims] 1. A coupling sleeve spline-fitted to the outer peripheral side of a synchronizing hub fixed to a main shaft so as to be movable in the axial direction; and a coupling sleeve interposed between the coupling sleeve and the synchronizing hub, an insert member that engages with the inner circumferential groove of the coupling sleeve and is movable in the central and axial directions when pressed, and between the transmission gear rotatably inserted into the main shaft and the synchro hub. A synchronous meshing device comprising a balk ring interposed therebetween and having a conical sliding surface that slides into sliding contact with a conical sliding surface of a clutch gear formed integrally with the transmission gear via the insert member when the coupling sleeve is moved by a shift fork. In the insert member, a sleeve engaging portion is formed in the upper part and a balk abutting portion is formed on both sides,
1. A synchronized meshing device comprising a plate spring member having a bent shape with a hub abutting portion formed at the lower part and deformable by pressing in the radial direction.