JPH0444931Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The invention relates to a lubricating device for a synchronizer mechanism that quickly matches the peripheral speeds of teeth meshing in a transmission, and improves the lubrication of the mechanism. It is used in technical fields to enable smoother and quieter operation.

BACKGROUND OF THE INVENTION Automobile transmissions are provided with synchronizing mechanisms to enable smooth gear shifting operations. In this synchronizer mechanism, when a shift fork that is linked to the operation of a shift lever slides a synchronizer sleeve that engages with the shift fork, the synchronizer ring is pressed against a cone-shaped clutch gear (synchronizer cone) by the movement of the sleeve. The structure is such that the difference in rotational speed is reduced by the frictional force generated between the two. In this synchronized state, the teeth of the synchro sleeve can mesh smoothly with the teeth of the clutch gear, allowing smooth gear switching (shifting).

In the conventional synchronizer mechanism, especially the synchro sleeve part, the synchro sleeve scoops up lubricant oil stored at the bottom of the transmission case in the direction of rotation, and the lubricant oil thus supplied is used for lubrication. Ta.

Problems to be Solved by the Invention Incidentally, synchronizer mechanisms that are frequently used require a large amount of lubricant to be supplied, rather than being supplied with too much lubricant. However, the conventional lubricating device for the synchro sleeve portion has only a structure in which the sleeve scrapes up the lubricating oil, and no other means have been provided.

Therefore, in order to fully utilize the lubricating oil that has been raked up by the synchro sleeve, the present invention has developed a device that can shift the flow of the raked up lubricating oil midway through the process, supply it to the desired position, and reuse it. The purpose is to obtain.

Means for Solving the Problems The present invention solves the above-mentioned problems by disposing the engagement between the synchro sleeve that is slid by the shift fork and the clutch gear formed on the transmission gear side between the two. In a synchronizing mechanism using a synchronizer ring, the shift fork is provided with a vane portion that receives the flow of lubricating oil scooped up by the synchro sleeve, and the curvature of the vane portion is adjusted to the upstream side in the rotational direction of the synchro sleeve. The lubricating device for a synchronizing mechanism is characterized in that the blade portion gradually increases in size toward the downstream, and the downstream end of the blade portion is bent in a direction intersecting the rotational direction of the synchronizing sleeve.

Effect: According to the above-described means, the lubricating oil scooped up by the synchronizing sleeve has its flow direction changed along the blade portion, and is forcibly supplied to the synchronizing sleeve and the synchronizing ring.

Embodiment An embodiment of the present invention will be described based on the drawings. As shown in FIGS. 1 and 3, in a synchro mechanism, lubricant stored in a transmission case is moved by a synchro sleeve 2 shifted by a shift fork 1. The oil 3 is scraped up, and in order to receive the scraped up lubricating oil and change the direction of the flow halfway, a blade 4 is installed on the upper inner peripheral surface of the shift fork 1.
Place a. The shape of the blade 4a is such that the curvature gradually increases from the upstream side to the downstream side in the rotational direction of the synchro sleeve 2, and the downstream end is arranged in a direction crossing the rotation direction of the synchro sleeve 2, that is, a direction that crosses the rotation direction of the synchro sleeve 2. It is bent towards the side.

By providing the above-mentioned blade portion, the lubricating oil 3 scraped up on the synchro sleeve 2 is transferred to the blade 4.
When it hits a, it changes its flow direction. Since the lower end is directed toward the side of the synchronizer sleeve 2, the lubricating oil 3 flowing along the blades 4a is forcibly supplied especially toward the synchronizer ring. Lubrication performance is significantly improved.

Further, FIGS. 2 and 4 show another embodiment, in which a blade 4b is arranged on the side surface of the shift fork 1. The shape of the blade 4b is such that the curvature gradually increases from the upstream side to the downstream side in the rotation direction of the synchro sleeve 2, and the downstream end is arranged in a direction crossing the rotation direction of the synchro sleeve 2, that is, a direction that intersects the rotation direction of the synchro sleeve 2. It is bent inward in the radial direction. Even if such a blade section is provided, the flow direction of the scraped up lubricating oil 3 can be changed. In this case, since the lower end is directed inward in the radial direction of the synchro sleeve 2, Lubrication performance is significantly improved.

Effects of the invention According to the invention described above, the shift fork is provided with a vane to change the flow of the lubricating oil scooped up by the synchro sleeve, so that it is forcibly supplied to the synchro sleeve or synchronizer ring. By ensuring a sufficient amount of lubricating oil to be supplied to the parts, the lubricating performance of each part is improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the blade, FIG. 2 is a perspective view showing another embodiment of the blade, and FIG. 3 is a perspective view showing one embodiment of the blade.
FIG. 4 is a front view showing the operating state of the blades in FIG. 2; FIG. 4 is a front view showing the operating state of the blades in FIG. 1... Shift fork, 2... Synchro sleeve, 3... Lubricating oil, 4a, 4b... Vane.

Claims (1)

[Scope of utility model registration request] In a synchronizer mechanism in which a synchronizer sleeve slid by a shift fork engages with a clutch gear formed on a transmission gear side via a synchronizer ring disposed between the two, the synchro sleeve is attached to the shift fork. A vane portion is provided to receive the flow of the scraped up lubricating oil, and the curvature of the vane portion is gradually increased from upstream to downstream in the rotational direction of the synchro sleeve, and the downstream end of the vane portion is connected to the synchro sleeve. A synchronized mechanism lubricating device characterized by being bent in a direction intersecting the rotational direction of the synchronized mechanism.