JPS598016Y2 - Pin type synchronous meshing device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a pin-type synchronous meshing device.

Conventionally, a pin-type synchronizing mesh device, which is one aspect of a vehicle transmission, has a friction characteristic during synchronization on the conical surface of a synchro ring 2 that makes frictional contact with the conical surface of a synchro cone 1, as shown in FIGS. 1 and 2. In consideration of this, an appropriate number of oil cutting grooves 3 are provided along the generatrix direction of the conical surface, and the synchro cone 1 is
The conical surfaces of the synchro ring 2 and the synchro ring 2 were designed to be in a state of boundary friction.

However, since the oil cutting groove 3 is provided on the synchro ring 2 side, even if centrifugal force acts on the synchro ring 2 side, which is the driving node at the beginning of synchronization, the lubricating oil will not flow through the oil cutting groove 3.
This has the disadvantage that it becomes difficult to reach the boundary friction region early.

Furthermore, in the past, the synchro cone 1 was manufactured by cutting a forged material, and the other synchro ring 2 had the oil cutting groove 3 formed by cutting, which also resulted in an increase in cost. Ta.

The present invention was devised for the purpose of solving the above-mentioned problems of the conventional device, and has a conical surface that can come into frictional contact with the conical surface of the synchro ring, and a synchro ring shaped by press working. The cone communicates with both ends of the conical surface of the synchro cone, and has an oil cutting groove shaped by the above-mentioned press processing, so the lubricating oil shaken off by the centrifugal force of the synchro ring during synchronization is transferred to the other synchro cone. Since the lubricating oil enters the press-formed oil cut groove that connects both ends of the conical surface of the holder, and is discharged from the oil cut groove, the boundary friction, which is the optimum lubrication condition during synchronization, can be reduced in a short time during synchronous action. can reach the area and obtain extremely good synchronization effect, and also
Unlike conventional equipment, the synchro cone and oil cutting grooves on the conical surface of the cone are pressed into shape.
There is a benefit of being able to significantly reduce costs.

Next, the present invention will be specifically explained based on examples.
First, in FIGS. 3 and 4, reference numeral 4 is a synchro sleeve that is shaped so that the spline portion of the main shaft 5 can be slid left and right by a shift fork (not shown), and a pin 6 is fitted to the sleeve 4. Several are installed.

Synchro rings 7 are provided at both left and right ends of the pin 6.

Reference numeral 8 denotes a synchro cone provided on the side of the main shaft gear 9. The material of the synchro cone 8 is pressed from a sheet metal member, and is opposed to the conical surface of the synchro ring 7 and comes into frictional contact with the conical surface of the synchro ring 7. An oil cutting groove 1 for lubricating oil is connected to the conical surface of the synchro cone 8, with both ends of the conical surface communicating with each other.
An appropriate number of oil cutting grooves 10 are formed in the generatrix direction of the conical surface of the synchro cone 8 during the pressing process of the synchro cone 8.

Note that the conical surface on the side of the synchro ring 7 is shaped so that there are no uneven parts.

Since this embodiment is configured as described above, during synchronization, the thrust in the predetermined direction transmitted from the synchro sleeve 4 to the synchro ring 7 via the pin 6 is transmitted to the synchro ring 7.
The conical surface of the main shaft gear 9 is driven by frictional contact with the conical surface of the synchro cone 8 side.

In this case, the lubricating oil adhering to the conical surface of the synchro ring 7 tends to scatter outward from the conical surface due to the centrifugal force of the ring 7, but does not try to scatter into the oil groove 10 formed in the synchro cone 8. The lubricating oil enters and is smoothly discharged from between the conical surfaces of the synchro ring and the synchro cone through the oil cutting groove 10.

As described above, according to the above embodiment, it is possible to obtain the boundary friction region which is the optimum lubrication condition at the initial stage of synchronization.

In other words, since a good coefficient of friction can be obtained between both conical surfaces between the synchro ring and the synchro cone, it is possible to obtain a synchronization meshing device having excellent synchronization operation characteristics.

Furthermore, unlike conventional devices, the synchro cone and the oil cutting groove can be formed by press working, which has the practical benefit of reducing costs.

In the above embodiment, the oil cutting groove 10 is formed in the direction of the generatrix of the conical surface, but the shape is not limited to this. Needless to say, it can be shaped so that both end portions communicate with each other.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of the conventional device, and Figure 2 is II of Figure 1.
- An enlarged cross-sectional view of the main part taken along line II, FIG. 3 is a vertical cross-sectional view of one embodiment of the present invention, and FIG.
It is an enlarged cross-sectional view of the main part taken along the line -IV. 7... Synchro ring, 8... Synchro cone, 10... Oil drain groove.

Claims (1)

[Scope of utility model registration request] A synchro cone that has a conical surface that faces the conical surface of a synchro ring and can come into frictional contact and is formed by press working, and an oil that communicates with both ends of the conical surface of the synchro cone and is shaped by the press work. A pin-type synchronous meshing device characterized by having a cut groove.