JPH041398Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a synchronizer ring for a synchronizer having a plurality of spline teeth and a plurality of key grooves into which shifting keys are fitted on the outer periphery.

(Prior art) In general, a synchronizer, as shown in Japanese Utility Model Application Publication No. 58-30032, supports gears for height and low speed changes on a shaft in an opposed manner, and gear splines are installed on the opposing surface of each of these gears. and a clutch cone, a clutch hub is provided on the shaft between the two gears, and a clutch sleeve is spline-fitted to the outer periphery of the clutch hub so as to be movable in the axial direction. A synchronizer ring is installed.

Further, a shifting key is interposed between a groove formed on the outer circumference of the clutch hub and a groove formed on the inner circumference of the clutch sleeve.

(Problems to be Solved by the Invention) By the way, the synchronizer ring of the synchronizer having the above-mentioned configuration has a large number of spline teeth B formed on the outer peripheral surface of the synchronizer ring A, as schematically shown in FIG. , a key groove C is formed on the surface facing the shifting key to receive one longitudinal end of the shifting key, but when the synchronizer is operated, that is, between the gear and the sleeve. Until the rotation difference disappears, the corner D of the key groove C into which the shifting key fits
It is conceivable that a large load will be applied to the portion, and cracks will occur from the corner D toward the thinner spline groove F, as shown by arrow E in FIG.

This invention was developed in view of the above circumstances.
It is an object of the present invention to provide a synchronizer ring that can prevent cracks from forming at the corner portions of the keyway even after long-term use of the synchronizer.

(Means for Solving the Problems) The present invention provides a synchronizer ring for a synchronizer having a plurality of spline teeth and a plurality of key grooves into which shifting keys are fitted on the outer periphery. The spline tooth facing the spline tooth and the spline tooth adjacent to the spline tooth are connected to each other, and a spline groove between these spline teeth is embedded.

(Function) According to the present invention, since the spline groove near the corner of the keyway is buried and has a thick wall, a large load is applied to the corner part of the keyway where the shifting key fits. However, no cracks occur near the corners.

(Example) An example of the synchronizer ring structure of the synchronizer according to the present invention will be described below with reference to the drawings.

Fig. 3 shows a Borgwana type synchronizer incorporating the synchronizer ring according to the present invention. In the figure, 1 is an output shaft, and 2 and 3 are gears for high and low speed change freely supported on the shaft 1. Gear spline teeth 21, 31 and clutch cones 22, 23 are integrally formed on opposing surfaces of each of these gears 2, 3, respectively.

4 is a clutch hub interposed between the gears 2 and 3 on the shaft 1; 5 is the clutch hub 4;
The clutch sleeve 5 is spline-fitted to the outer periphery of the clutch sleeve 5 so as to be movable in the axial direction.
A large number of spline teeth 5 extending in the axial direction on the inner peripheral surface of the
1 and a plurality of concave grooves 52, and the concave groove 52 of the clutch sleeve 5 and the clutch hub 4
A shifting key 6 is interposed between the concave groove 41 formed on the outer periphery of the shifting key 6.

S represents the clutch sleeve 5 and each gear 2,
The synchronizer ring according to the present invention is interposed between the synchronizer ring S and the synchronizer ring S.
has a large number of spline teeth 7 and a spline groove 70 extending in the axial direction on its outer circumferential surface, and has a 3 in its end face facing the gears 2 and 3 for receiving one end in the length direction of the shifting key 6. key grooves 8 are formed.

In the embodiment shown in the figure in the above synchronizer ring S, the spline tooth 7a facing one corner C1 of the keyway 8 and the spline tooth 7b adjacent to one side of the spline tooth 7a.
and embed the spline groove 70 between the spline teeth 7a and 7b, and also the spline tooth 7c facing the other corner C2 of the keyway 8 and the spline tooth 7c adjacent to one side of the spline tooth 7c. The spline teeth 7d are connected to each other, and the spline groove 70 between these spline teeth 7c and 7d is also buried.

In the case of a synchronizer incorporating the synchronizer ring S described above, among the spline teeth 51 of the clutch sleeve 5, the splines embedded by connecting the spline teeth 7a, 7c and the spline teeth 7b, 7d of the synchronizer ring S are used. Spline tooth 51 in a portion corresponding to groove 70
Needless to say, it is necessary to delete it.

The present invention has the above-mentioned structure, and when the synchronizer is activated, that is, until there is no difference in rotation between the gear 2 or 3 and the clutch sleeve 5, the key groove 8 into which the shifting key 6 fits is A large load acts on the corner portion C1 or C2 of the spline tooth 7a or 7c facing the corner portion C1 or C2 and the spline tooth 7a or 7c.
By connecting the spline teeth 7b or 7c adjacent to the spline teeth 7a, 7b or 7c,
Since the spline groove 70 between 7d is buried and the wall thickness is sufficiently thick, the corner C of the key groove 8
No cracks occur from 1 or C2.

In the above embodiments, the spline tooth 7a or 7c facing the corner C1 or C2 portion is connected to the spline tooth 7b or 7d adjacent to one side of the spline tooth 7a or 7c, but the corner portion C1 or A total of three spline teeth, including the spline tooth facing C2 and the spline teeth adjacent to each side of the spline tooth, may be connected.

(Effects of the Invention) As described above, the present invention provides a synchronizer ring for a synchronizer in which a plurality of spline teeth and a plurality of key grooves into which shifting keys are fitted are formed on the outer periphery. By connecting the spline tooth and the spline tooth adjacent to the spline tooth and embedding the spline groove between these spline teeth, the wall thickness near the corner of the key groove is thicker, so that the synchronizer can operate easily. Accordingly, even if a large load is applied to the corner portion of the key groove into which the shifting key fits, it is possible to reliably prevent cracks from forming near the corner.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted front view showing an embodiment of the synchronizer ring according to the present invention, Fig. 2 is an explanatory view of the main parts, and Fig. 3 is a synchronizer equipped with the synchronizer ring according to the present invention. Cross-sectional view of main parts,
FIG. 4 is an explanatory diagram of the main parts of a conventional synchronizer ring. 6...Shifting key, S...Synchronizer ring, 7...Spline tooth, 70...Spline groove, 8...Key groove, C1, C2...Corner.

Claims (1)

[Scope of utility model registration request] In a synchronizer ring of a synchronizer having a plurality of spline teeth and a plurality of key grooves into which a shifting key fits on the outer periphery, the spline teeth facing the corners of the key grooves and the spline teeth adjacent to the spline teeth. A synchronizer ring structure of a synchronizer, characterized in that the spline teeth are connected together and a spline groove between these spline teeth is buried.