JPH058052U - Synchro device - Google Patents

Abstract

(57) [Abstract] [Purpose] The main feature of the present invention is to prevent the occurrence of the inclination of the synchro key due to the sliding of the synchro cross. [Structure] A holder 20 in which the sync key portion 6 is accommodated in a key accommodating groove 7, a sync key 23 which is provided so as to be capable of projecting and retracting in the holder 20, and a sync key 23 which is provided in the holder 20 are synchronized with each other. The spring 24 for urging the hook 5, the projections 21 and 21 provided on both sides of the key receiving groove 7 of the holder 20 in the width direction, and the projections 21 and 21.
The holder receiving portions 22 and 22 are provided at both opening edge portions of the key receiving groove 7 corresponding to 21 and receive the projections 21 and 21 to support the holder 20. By this, even if the sync-reeve 5 is slid, the synchro key 23 does not tilt in the sliding direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a synchronizing device used for a speed change mechanism such as a transmission of an automobile.

[0002]

[Prior Art]

 In automobile transmissions, generally, a warner type synchronizing device is used to change gears in accordance with rotational speeds.

This synchronizer is generally provided with synchronizer rings 2 and 3 on both sides of the synchronizer hub 1 as shown in FIGS. 5 and 6, and the center of the synchronizer hub 1 with a selector-4 on the outer peripheral side. A synchro cross sleeve 5 that can be operated in the same direction is provided, and a key receiving groove 7 extending along the axial direction is provided in the outer peripheral portion 1 of the synchro hub 1, and the synchro key portion 6 is received in this key receiving groove 7. The structure is used.

By the way, conventionally, in the synchro key portion 6 of this synchro device, as shown in FIGS. 5 and 6, a synchro key 8 is projected and retracted in a key receiving groove 7 toward the inner surface of the synchro hub 1. The synchro key 8 is accommodated as much as possible, and the synchro key 8 is urged by a fixed spring 9 on the inner bottom of the key receiving groove 7 so that the projection 8a on the upper portion of the synchro key 8 is a recess provided on the inner peripheral surface of the synchro hub 1. 8b is engaged.

In such a synchronizer, the synchronizer sleeve 5 is slid in the axial direction so that either one of the synchronizer rings 2 and 3 is provided in a mating gear (not shown). It is pressed against the cone portion 10a of the and starts the synchronous operation. Then, through this synchronizing action, the tooth 5a (shown only in FIG. 6) of the sync cross sleeve 5 passes through the tooth 2a (or the tooth 3a) of the synchronizer ring 2 (or the synchronizer ring 3) and the synchronizing clutch 10 It meshes with tooth 10b.

[0006]

[Problems to be solved by the device]

 By the way, according to the above synchronizing apparatus, the end portion of the spring 9 on the base side is fixed to the synchronizing hub 1 and is supported in the key receiving groove 7, so that the synchronizing key 8 can be operated during the selector operation. May tilt along the sliding direction.

That is, as shown in FIG. 7, when the sync cross sleeve 5 is slid, for example, in the right direction (the direction of the arrow), the synchronizing key 8 receives the force at that time and the synchronizing key 8 and the key. The gap with the accommodation groove 7 may tilt around the contact point A as indicated by the chain double-dashed line.

When such an inclination occurs, the synchronizer 8 pushes the synchronizer rings 2 and 3 and the synchronizer rings 2 and 3 are abraded even though the truss mission of the vehicle is neutral. ..

As described above, in the structure in which the base portion of the spring 9 is fixed to the synchro hub 1, the synchro key 8 is assembled into the synchro hub 1 together with the spring 9, and then the synchro sleeve 5 is fitted. The synchro key 8 may tilt due to the sliding of the Synchrobe 5 and the assembling work was troublesome in order to avoid it.

The present invention has been made in view of such circumstances, and an object thereof is to provide a synchronizing device capable of preventing the occurrence of the inclination of the synchro key due to the sliding of the synchro cross sleeve. To do.

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the synchronizer of the present invention has a holder in which a synchronizer portion is housed in a key receiving groove, and a synchronizer provided in the holder so as to be capable of projecting and retracting with respect to the inner surface of the synchronizer hub. -, An elastic member provided in the holder for urging the synchro key toward the synchronous sleeve, and a long length of the key receiving groove on both sides of the holder in the width direction of the key receiving groove. And projections provided along the depth direction, and corresponding to these projections, provided at both opening edge portions of the key receiving groove along the edges thereof to support the holder by receiving the projections. It is composed of a holder receiving part that operates.

[0012]

[Action]

 According to the synchronizing device of the present invention, the holder provided with the synchronizing key is supported by the synchronizing hub by the structure of the projection and the holder receiving portion so as not to be inclined with respect to the sliding direction of the synchronizing cloth. In addition, since the synchro key is pressed against the inner peripheral surface of the syncrebe by an elastic member that is fixed to the holder against this inclination, even if the syncreve slides, the synchro key does not slide in the sliding direction. There is no inclination.

Moreover, since the holder, the synchro key, and the elastic member are one unit that can be inserted into and removed from the key receiving groove, after assembling, the key is inserted after the synchro hub is fitted to the synchro hub. It suffices to insert the unit into the accommodation groove, and the sync key can be mounted without causing tilting.

[0014]

【Example】

 The invention will be described below with reference to an embodiment shown in FIGS. However, in the drawings, the description of the same parts as those described in the above-mentioned “Prior art” will be omitted, and different parts (main parts of the invention) will be described in this section. To The present embodiment is different in the accommodation structure of the synchro key.

That is, 20 is a holder. The holder 20 has an outer shape (block shape) corresponding to the size of the key receiving groove 7. The holder 20 is slidably housed in the key housing groove 7. Further, protrusions 21 and 21 are provided along the groove direction of the key receiving groove 7 on both sides of the end of the holder 20 on the opening side of the key receiving groove 7 in the groove direction of the key receiving groove 7. .. Then, these protrusions 21 and 21 are placed on the holder receiving portions 22 and 22 formed by the entire opening edge of the key receiving groove 7, and the holder 20 is placed at a predetermined position as shown in FIG. There is.

A pin-shaped synchro key 23, for example, is housed in the upper surface of the holder 20 corresponding to the position of the concave portion of the sync cloth sleeve 5 so as to project toward and retract from the inner peripheral surface of the sync cloth sleeve 5. Has been done. A spring 24 (elastic member) is provided in the accommodating recess 20a of the holder 20 that accommodates the synchronizer 23, and biases the accommodated synchronizer 23 toward the recess 8b.

According to the synchronizing device thus configured, the holder 20 is synchronized by the projections 21 and 21 and the holder receiving portions 23 and 23 extending along the entire length of the key receiving groove 7 as clearly shown in FIG. It becomes difficult for the sleeve 5 to tilt with respect to the sliding direction. The synchronizer 23 is pressed against the inner peripheral surface of the sync cloth sleeve 5 by a spring 24 fixed to the holder 20 which is hard to tilt. Therefore, even if the sync cross sleeve 5 slides (slides), the synchro key 23 does not tilt in the sliding direction (sliding direction). Therefore, abrasion of the synchronizer rings 2 and 3 due to the inclination of the synchronizer key 5 can be prevented.

Moreover, the holder 20, the synchro key 23, and the spring 24 are one unit that can be inserted into and removed from the key receiving groove 7 as shown in FIG. 3. Therefore, when assembling the synchro device, the synchro hub is used. It is sufficient to fit the sync cloth sleeve 5 in 1 and then insert the unit into the key receiving groove 7, and the sync key 23 can be easily mounted without causing an inclination.

[0019]

As described above, according to the present invention, even if the sync cross sleeve slides, the synchro key does not tilt in the sliding direction. Therefore, abrasion of the synchronizer ring due to the inclination of the synchronizer can be prevented.

Moreover, when assembling the synchronizing device, after inserting the synchronizing cloth into the synchronizing hub, it is sufficient to insert the unit including the synchronizing key, the holder and the elastic member into the key receiving groove. It is also possible to easily attach the sync key without tilting.

[Brief description of drawings]

FIG. 1 is a sectional view showing a synchronizing device according to an embodiment of the present invention.

FIG. 2 is a front view of a sync hub having a built-in sync cross and key unit shown in FIG.

FIG. 3 is a perspective view showing the key unit composed of the synchronizer, the holder, and the spring shown in FIG. 2 together with a state of being housed in a key housing groove.

FIG. 4 is a view showing a mounted state of a holder.

FIG. 5 is a sectional view showing a conventional synchronizing device.

FIG. 6 is a front view of a synchro hub having the synchro cross and synchro key shown in FIG.

FIG. 7 is a view for explaining that the synchro key is tilted in the sliding direction of the synchro cloth.

[Explanation of symbols]

1 ... Synchro hub, 2 ... Synchronizer ring, 5 ...
Synchronous sleeve, 6 ... Synchro key part, 10 ... Synchro clutch, 20 ... Holder, 21 ... Projection part, 22 ... Holder receiving part, 23 ... Synchro key, 24 ... Spring (elastic member).

Claims (1)

[Claims for utility model registration] [Claim 1] A synchronizer hub having a key receiving groove formed along the axial direction is provided on the outer peripheral portion, and synchronizer rings are provided on both sides of the synchronizer hub. In a synchro device provided with a sync sleeve on the outer peripheral side and having a synchro key portion housed in the key housing groove, the synchro key portion includes a holder housed in the key housing groove, and A synchro key provided on the holder so as to be capable of projecting and retracting with respect to the inner surface of the synchro hub, an elastic member provided on the holder for urging the synchro key toward the sync cross sleeve, and the key of the holder. -Protrusions provided along both sides of the accommodation groove in the width direction and along the length direction of the key accommodation groove, and those on both opening edge portions of the key accommodation groove corresponding to these protrusions. of Provided along, synchronizer, characterized in that consisted a holder receiving portion for supporting the holder receiving said projection.