JPH0125784Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a synchronizing device for a gear transmission, and is particularly applicable to automobiles and the like. The first rotating member and the second rotating member
The present invention relates to a synchronization device applied to a gear transmission that synchronously engages and disengages from a rotating member to complete a predetermined gear train.

(Prior Art) Such a synchronizing device generally includes a hub member that rotates integrally with a first rotating member, and two rotating shafts concentrically with the first rotating member adjacent to both sides of the hub member in the axial direction. The members are arranged. Engagement devices that are integrally rotatable are disposed on these rotating members. Further, a switching member is disposed on the hub member so as to be displaceable only in the axial direction, and is provided with teeth that mesh with the engagement device. This switching member has an appropriate number of pushers disposed in a suitable manner, and one end thereof is connected to the synchronizing means of the engaging device, so that the switching member acts synchronously with the synchronizing means in response to displacement of the switching member toward the engaging device. Press as hard as possible.

(Problems to be Solved by the Invention) In the above conventional technology, two rotating members are disposed on both sides of a hub member, and an engagement device that rotates integrally is disposed. Therefore, when the switching member is displaced in the axial direction to perform a synchronizing action, the presser does not fall off from the hub member. However, when the engagement device is disposed only on either side of the hub member in the axial direction, the switching member is displaced in the axial direction to perform a synchronizing action, and the meshing teeth of the switching member are connected to the engagement device. There is no problem when the pusher is engaged with the meshing teeth of the synchronizer, but when the pusher is disengaged from the hub member, the pusher may fall off from the hub member, impairing the function of the synchronizer.

In order to solve the problems of the prior art, the technical problem of the present invention is to prevent the pusher of the synchronizer from falling off the hub member.

[Structure of the idea]

(Means for Solving the Problems) The technical measures taken to solve these technical problems include an axial groove that extends in the axial direction on the outer circumferential surface of the hub member and an axial groove that intersects with the axial groove. A circumferential groove is formed therein, and a protrusion is formed that projects inward in the radial direction of the locking ring, and the protrusion is engaged with the axial groove.

(Example) Hereinafter, an example in which the technical means of the present invention are implemented will be described with reference to the drawings.

Referring to FIGS. 1 to 4, an intermediate shaft or output shaft 10 serving as a first rotating member is supported by a case 1 via a bearing 1a. A hub, which is a hub member 11, adjacent to the bearing 1a has an inner spline 1.
The outer spline 10a is fitted into the outer spline 10a at the portion 1a, and relative movement is restricted by a retaining ring 13. On the hub member 11, an internal spline 15a, which serves as the meshing teeth of a sleeve 15, which is a switching member that is shifted in the axial direction by a fork 16 linked to an operating rod (not shown) on its outer periphery, is slidable. A fitting outer spline 11b is formed. Axial grooves 11c (see FIG. 2) are formed at three locations on the outer spline tooth 11b, dividing the circumference approximately equally. As shown in the second figure, the outer diameter of the hub member 11 decreases from one end 11e to the other end 11f. That is, outer spline 1
When the outer diameter of the shoulder portion 1b is D1, the outer diameter D2 of the shoulder portion 11g, and the outer diameter of the other end portion 11f is d, D1>D2>d. A circumferential groove 11 is exposed to the axial groove 11c at the boundary between the outer spline 11b and the shoulder 11g.
d is formed. A locking ring 12 having the shape shown in FIG. 4 is attached, and a protrusion 12c formed on the inner periphery of the approximately C-shaped base 12a engages with the axial groove 11c to prevent rotation. fulfill a function. The protrusion 12c can engage with any of the plurality of axial grooves 11c of the hub 11,
In addition, a plurality of protrusions 12c may be formed as necessary.

A shifting key 17, which functions as a pusher, is fitted into each of the axial grooves 11c so as to be relatively slidable in the axial direction, and is elastically loaded with a pushing force applied to the inside in the radial direction. The stepped portion 17a is pressed against the inner spline 15a of the sleeve 15 by a substantially C-shaped resilient means 18. Thereby, the shifting key 17 is operatively connected to the switching member. The shifting key 17 is restricted from moving rightward in FIG. 1 by a locking ring 12. As shown in FIG.

On the left side of the hub member 11 in FIG.
A second rotating member 20 (input member) is supported concentrically with the rotating member 10 by a housing 2 connected to the case 1 via a connecting plate 3 via a bearing 2a, and an engagement device 24 is provided so that the second rotating member 20 (input member) can rotate together. is installed. The engagement device 24 includes a spline piece 22 that serves as an engagement member that is integrally connected to the input gear 21 portion.
and a synchronizer ring 23 serving as a synchronizing means to which one end of the shifting key 17 is connected.

Both of these have outer splines 22a and 23a, which serve as meshing teeth with which the inner spline 15a of the sleeve 15 meshes, on the outer periphery, and a conical engagement surface 22b,
Synchronization is performed at 23b.

The input gear 21 meshes with a gear 31 of a third rotating member 30 (countershaft) supported by the housing 2 via a bearing 2b. Another hub member 32 is integrally disposed on this third rotating member 30, and like the hub member 11 described above, the hub member 32
A further shifting key 45 is slidably fitted only in the axial direction and is operatively engaged with a further sleeve 33 which is slidably fitted to the sleeve 2 .

Case 1 is located on the right side of the sleeve 33 in the first drawing.
A fourth rotating member 40 supported via a bearing 1b
is arranged concentrically with the third rotating member 30.
Another spline pin 41 serving as an engaging member is integrally spline-fitted to the shaft portion 40a of the fourth rotating member 40, and another synchronizer ring 43 serving as synchronizing means is disposed. The spline piece 41 is prevented from coming off by a retaining ring 42.
Note that the gear 40b of the fourth rotating member 40 meshes with the gear 10b of the first rotating member 10.

The operation of the embodiment described above will be explained with reference to FIG.

Since the inner spline 15a of the sleeve 15 is not engaged with the outer splines 22a and 23a, the first rotating member 10 and the first rotating member 20 are in an uncoupled state.

On the other hand, another sleeve 41 is connected to the spline piece 4.
1, and the third rotating member 30 and the fourth rotating member 40 are in a connected state. Therefore, the power transmitted to the second rotating member 20 is transferred to the gear 21 and the gear 3.
1 Third rotating member 30 Hub member 32 Sleeve 33 Spline piece 41 Fourth rotating member 40
Gear 40b Gear 10b (first rotating member 10)
is communicated.

Next, when the fork 16 is pressed to the left in this state, the sleeve 15 and the sleeve 33 are displaced, and the shifting key 17 presses the synchronizer ring 23 against the spline piece 22 to perform a synchronizing action. . Then, the rotations of the first rotating member 10 and the second rotating member 20 coincide, and the inner spline 15a of the sleeve 33 meshes with the outer spline 22a of the spline piece 22, and at the same time, the sleeve 33 comes off from the spline piece 41. Become. Then, the first rotating member 10 and the second rotating member
The rotating member 20 is in a connected state, and the third rotating member 30 and the fourth rotating member 40 are in a disconnected state.
Therefore, the power transmitted to the second rotating member 20 is
Gear 21 Spline piece 22 Sleeve 15
Hub member 11 first rotating member 10 (further, for example, gear 10b gear 40b fourth rotating member 4
0) is transmitted.

Subsequently, when the fork 16 is pressed in the right direction in the figure from this state, the sleeve 15 and the sleeve 33 are displaced and the shifting key 17 is returned in a direction away from the synchronizer ring 23.
The sleeve 15 is disengaged from the spline piece 22 and returned to the illustrated position.
disengages from the spline piece 22 and returns to the illustrated position. At this time, even if the sleeve 15 is significantly displaced to the right in the figure, the other end 17c of the shifting key 17 will not come into contact with the locking ring 12 and come off from the axial groove 11c of the hub member 11. At the same time, the sleeve 33 is pressed and the shifting key 45 presses the synchronizer ring 43 against the spline piece 41 to perform a synchronizing action, so that the rotation speeds of the third rotating member 30 and the fourth rotating member 40 match, and the sleeve 33 meshes with the spline piece 41. With this operation, the state returns to the illustrated state, and the power transmitted to the second rotating member 20 is transmitted to the gear 21 gear 31 third rotating member 30 hub member 32 sleeve 33 spline piece 4
1 Fourth rotating member 40 Gear 40b Gear 10b
(first rotating member).

[Effect of idea]

A hub member 11 that rotates integrally with the first rotating member 10 , and a second rotating member 20 that is adjacent to either side of the hub member 11 in the axial direction and is arranged concentrically with the first rotating member 10 . Engagement device 2 that can rotate
4. A switching member disposed on the hub member 11 so as to be displaceable only in the axial direction, and provided with meshing teeth (inner spline 15a) that mesh with the meshing teeth (inner spline 22a, outer spline 23a) of the engagement device 24. (sleeve 15), is operatively connected to this switching member (sleeve 15), is disposed on the hub member 11 so as to be displaceable only in the axial direction, and has one end connected to the synchronizing means (synchronizer ring) of the engagement device (249). 2
2) is connected to the switching member (sleeve 15)
A pusher (shifting key 17) that presses the synchronizing means (synchronizer ring 22) to synchronize in response to displacement in the direction of the engagement device, and the other end 17c of the pusher (shifting key 17). When it comes into contact, the presser (shifting key 17)
By using a gear transmission having a locking ring 12 attached to the hub member 11 to prevent movement in the opposite direction to the engagement device 24, the pusher (shifting key 17) can be moved in the opposite direction. It becomes possible to provide the unique effect of being able to prevent the hub member shell from falling off and at the same time not impairing the synchronization effect.

Furthermore, in the present invention, the locking ring 12 is formed with a protrusion 12c that protrudes radially inward, and this projection 12c restricts the rotation of the locking ring 12 itself. This prevents wear from occurring on the contact surface of the hub member 11 of the retaining ring 12.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
3 is a right side view of FIG. 2, and FIG. 4 is a front view of a locking ring, which is a main part of the invention. First rotating member...10, Hub member...11, Second rotating member...20, Engagement device...24, Sleeve...15, Synchronizer ring...23,
Presser...17, Retaining ring...12, Axial groove...
11c, circumferential groove...11d, protrusion...12
c.

Claims (1)

[Scope of utility model registration request] a hub member that rotates integrally with the first rotating member;
a second rotating member disposed concentrically with the first rotating member adjacent to either side of the hub member in the axial direction; and an engagement for engaging and disengaging the first rotating member and the second rotating member. a sleeve having meshing teeth disposed on the hub member so as to be displaceable only in the axial direction and engaging and disengaging from the meshing teeth of the engagement device; and a sleeve operatively connected to the sleeve and the hub. The member is disposed so as to be displaceable only in the axial direction, one end thereof is connected to the synchronizer ring of the engagement device, and the synchronizer ring is actuated synchronously in response to the displacement of the sleeve in the direction of the engagement device. a lock attached to the hub member to prevent movement of the presser in a direction opposite to the engagement device when the other end of the presser is abutted and engaged with the pusher that presses the pusher; In the synchronizer, an axial groove extending in the axial direction and a circumferential groove intersecting the axial groove are formed on the outer peripheral surface of the hub member, and a radial direction of the locking ring is formed. A synchronizing device for a gear transmission, characterized in that a protrusion projecting inward is formed and the protrusion is engaged with the axial groove.