JP2008215450A - Synchronizer of transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synchronizer of a transmission for improving mass productivity, by reducing the number of part items. <P>SOLUTION: This synchronizer of the transmission has a gear stage having a coupling sleeve, an insert key, a clutch gear, a balk ring and a sybchrohub, and a support synchronous force generating mechanism for converting force in the peripheral direction by relative rotation into support synchronous force in the axial direction for pressing the balk ring to the clutch gear, when the relative rotation is generated between the synchrohub and the balk ring, by generating frictional torque between a balk ring tapered cone surface and a clutch gear tapered cone surface in shifting, and is provided with a spring for energizing the insert key in the outer diameter direction, and energizing the balk ring to the initial position side in the axial direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a transmission synchronization device that is applied to a vehicle gear transmission and the like and includes a coupling sleeve, a synchro hub, baux ring, and a clutch gear.

Conventionally, in a transmission synchronizer, when a driver moves a coupling sleeve by operating a shift lever during gear shifting, the chamfers of the coupling sleeve and the baux ring come into contact with each other to prevent movement of the coupling sleeve. The baux ring taper cone surface pushes the clutch gear taper cone surface to generate a friction torque (synchronous force), thereby performing the rotation synchronization action between the boke ring and the synchro hub. Further, a return spring for returning the baux ring to the initial position and a spread spring for generating the lock force of the insert key are provided (see, for example, Patent Document 1).
JP 2006-1332739 A

  However, in the above prior art, since the return spring and the spread spring are assembled, there is a problem that the assembly takes time and the mass productivity deteriorates.

  The present invention has been made paying attention to the above-mentioned problems, and an object of the present invention is to provide a transmission synchronizer in which the number of parts is reduced and mass productivity is improved.

  In order to achieve the above object, in the present invention, a spring for urging the insert key in the outer diameter direction and urging the baux ring toward the axial initial position side is provided.

  Therefore, it is possible to provide a transmission synchronization apparatus in which the number of parts is reduced and mass productivity is improved.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for realizing a transmission synchronization apparatus according to the present invention will be described below based on an embodiment shown in the drawings.

[Synchronizer configuration]
1 is a cross-sectional view taken along line AA (see FIG. 2) of the transmission synchronizer in the neutral state, and FIG. 2 is an axial cross-sectional view (x-axis negative direction side). 3 is a radial front view, and FIG. 4 is an axial front view (x-axis positive direction side). The axial direction of the synchronizer is the x axis, and the direction from the coupling sleeve 1 to the main gear 2 is the positive direction.

  The transmission synchronizer includes a coupling sleeve 1, a main gear 2, a clutch gear 3, and a baux ring 4. Further, a sync hub 5, an insert key 6, a spring 100, and a main shaft 8 are provided.

  The coupling sleeve 1 is an input member for shifting operation load (manual operation force or actuator driving force), and is splined to the sync hub 5. The coupling sleeve 1 is provided so as to rotate integrally with the sync hub 5 and move in the x-axis direction.

  A shift fork is fitted in the groove on the outer surface of the coupling sleeve 1, and two coupling chamfers are formed on the circumferential surface for each gear position. Thereafter, the two chamfers are designated as the first and second chamfers 11 and 12 regardless of the gear position.

  The first-stage chamfer 11 and the second-stage chamfer 12 are alternately provided so that their radial positions do not overlap each other, and the length in the x-axis direction is short for the first-stage chamfer 11 and the second-stage chamfer 12 is long. ing. The first-stage chamfer 11 is provided on both sides of the second-stage chamfer 12, and the first-stage chamfer 11 comes into contact with the baux ring 4 first when the coupling sleeve 1 is fitted to the boke ring 4. It has become.

  The main gear 2 is rotatably provided with respect to the main shaft 8 and rotates integrally with the main shaft 8 when the speed change operation is completed.

  The clutch gear 3 is a synchronizing member that synchronizes the rotation of the main gear 2 and the rotation of the synchro hub 5 and is integrally fixed to the main gear 2 by press-fitting or the like. A clutch gear taper cone surface 31 is formed on the clutch gear 3, and the clutch gear 3 is taper-fitted to the bokeling taper cone surface 41 of the baux ring 4.

  The baux ring 4 is a synchronizing member that synchronizes the rotation of the main gear 2 and the rotation of the sync hub 5, and is movable in the axial direction and relatively rotatable in the circumferential direction by a predetermined amount with respect to the sync hub 5. The predetermined amount is a chamfer alignment movement amount of the spline teeth.

  A bokeling tapered cone surface 41 and a bokeling chamfer 43 are formed on the bokeling 4. Further, a cam 40 protruding in a trapezoidal shape in the negative x-axis direction is provided on the outer peripheral portion of the bake ring 4. On the side surface of the cam 40, a bokeling cam surface 42 directed in the negative x-axis direction is provided (see FIG. 3).

  The synchro hub 5 is a synchronizing member that is splined to the main shaft 8. The sync hub 5 is provided with a concave cam 50 for accommodating the cam 40 of the boke ring 4, and a sync hub cam surface 52 that abuts the boke ring cam surface 42 is provided on both sides of the cam 50. Yes.

  As a result, when the cam surfaces 42 and 52 come into contact with each other due to the relative rotation of the bokeling 4 and the synchro hub 5 at the time of shifting, the radial force that the bokeling 4 receives from the synchro hub 5 is decomposed, and the x-axis support Synchronous force is generated. On the other hand, when the relative rotation is not generated and when the cam surfaces 42 and 52 are separated (such as when neutral), the baux ring 4 does not receive a force from the synchro hub 5, and thus no support synchronizing force is generated.

  The insert key 6 is a synchronizing member disposed on the outer periphery of the synchro hub 5. The insert key 6 is supported by the synchro hub 5, the coupling sleeve 1, and the spring 100.

  The key projection provided on the outer periphery of the insert key 6 and the key groove of the coupling sleeve 1 are positioned in a locked state, rotate together with the synchro hub 5 and move in the axial direction in conjunction with the coupling sleeve 1. It is movable.

  The spring 100 is an annular line member provided on the inner peripheral side of the boke ring 4, and is formed from a pair of springs 100, 100 that intersect each other. The spring 100 is engaged with the baux ring 4 at an attachment portion 410 provided on the boke ring 4 to urge the boke ring 4 in the axial direction (neutral direction) and urge the insert key 6 in the outer diameter direction. To do.

  When the coupling sleeve 1 is in the neutral position and when the chamfers 11 and 12 of the coupling sleeve 1 and the chamfer 32 of the clutch gear 3 are engaged with each other, the baux ring 4 is returned to the neutral position and the support synchronization force is generated. By using the same spring 100 as the spring for preventing the squeezing and the spring for urging the insert key 6 in the outer diameter direction, the number of parts can be reduced as compared with the case where separate springs are used.

[Spring details]
FIG. 5 is a perspective view of one of the pair of springs 100. The spring 100 has an insert key push-up portion 110, an engagement portion 140 (curved portion), and a fulcrum portion 150.

  The pair of springs 100, 100 are provided on the x-axis direction amount side of the sync hub 5, and are different in diameter from each other by a predetermined amount a (see FIG. 1). The different diameters prevent the pair of springs from interfering with each other.

  The predetermined amount a is set to be larger than an amount b in which the spring 100 is deformed in the radial direction by the movement of the insert key 6 (a> b: see FIG. 1). As a result, when a locking force is applied to the insert key 6, the interference between the pair of opposed springs 100 is prevented, and the locking force load of the insert key 6 is stabilized.

  In addition, one end of the end of the spring 100 that is a wire member is an insert key push-up portion 120 and the other end is a rotation stopper 130. Further, the insert key push-up portion 110 and the engaging portion 140 are provided at three places in the circumferential direction.

  The insert key push-up portion 110 is formed by bending the wire member of the spring 100 into an M shape in the outer diameter direction, and biases the insert key 6 in the outer diameter direction in the M-shaped recess (see FIG. 7). The insert key push-up portion 120 at the end extends as it is in the circumferential direction of the spring 100 and biases the insert key 6 in the outer diameter direction (see FIG. 8).

  The rotation stopper 130 is formed by bending the end portion of the spring 100 in the axial direction, and is engaged with the key groove portion 51 of the synchro hub 5, so that the spring 100 is moved when the bokeling 4 moves in a direction to be pressed against the clutch gear 3. Is prevented from rotating in the circumferential direction, and the spring 100 reliably generates a return force with respect to the baux ring 4 (see FIG. 8).

  The engaging portion 140 is formed by bending and projecting the linear member of the spring 100 in the axial direction, and is hooked on the attachment portion 410 of the baux ring 4 to lock the spring 100 to the boke ring 4 (see FIG. 7). .

  The fulcrum portion 150 bends and protrudes the linear member of the spring 100 in the same direction as the engaging portion 140 and abuts against the synchro hub 5 to support the spring 100 when the spring 100 is displaced in the x-axis direction (FIG. 10). reference).

  By providing a fulcrum, the spring 100 as a whole is prevented from moving in the axial direction when the bokeling 4 is moved in the direction in which it is pressed against the clutch gear 3 (x-axis direction). Return to the initial position. Further, the shape of the spring 100 is simplified by curving the spring 100 as a fulcrum.

[Details of bowling]
FIG. 6 is a partial perspective view of the bowling 4. A chamfer 43 is provided at the end of the bokeh ring 4 in the positive x-axis direction, and a spring mounting portion 410 is provided at the end of the x-axis negative direction. The spring mounting portion 410 protrudes in the outer diameter direction, and the side opposite to the chamfer 43 (x-axis negative direction side) is chamfered to form a chamfered slope 420.

  In addition, the circumferential direction position of the spring attachment part 410 and the chamfer 43 does not correspond, and the spring attachment part 410 is provided in the location where the chamfer 43 is not provided in the circumferential direction.

[Assembly state]
7 to 10 are partial perspective views of the baux ring 4 and the synchro hub 5 in the assembled state of the spring 100. FIG.

(Insert key press)
FIG. 7 shows the vicinity of the insert key push-up portion 110 of the spring 100, and FIG. 8 shows the vicinity of the insert key push-up portion 120 and the rotation stopper 130 that are the end portions of the spring 100. The insert key 6 is urged in the outer diameter direction by the elastic force of the wire member of the spring 100, and the rotation of the spring 100 is prevented by the rotation stopper 130.

(Bowling neutral position bias)
9 shows the vicinity of the engaging portion 140 of the spring 100, and FIG. 10 shows a partial cross section of FIG. The spring 100 is assembled from both sides of the sync hub 5 in the x-axis direction, and is engaged with the spring mounting portion 410 of the boke ring 4 to urge the boke ring 4 to the neutral position in the x-axis direction.

  Further, when the engaging portion 140 is engaged with the spring mounting portion 410, the fulcrum portion 150 abuts on the synchro hub 5 and the spring 100 is supported.

[Assembly procedure-1]
11 is a coupling sleeve 1 alone, and FIG. 12 is an axial sectional view and an axial front view when the synchro hub 5 is assembled. The synchro hub 5 is assembled to the inner peripheral side of the coupling sleeve 1.

[Assembly procedure-2]
FIG. 13 is a view in which the insert key 6 and the spring 100 are assembled. A pair of springs 100, 100 are assembled from both sides of the x-axis. At that time, the rotation stopper 130 of the spring 100 is engaged with the key groove portion 51 of the synchro hub 5 and assembled.

[Assembly procedure-3]
FIG. 14 is a view in which one baux ring 4 is assembled from the x-axis positive direction side. When assembling the baux ring 4, the attachment portion 410 on the boke ring 4 side is engaged with the engagement portion 140 on the spring 100 side.

  At the time of engagement, first, the chamfered slope 420 of the attachment portion 410 of the baux ring 4 abuts on the engagement portion 140 of the spring 100, and the spring 100 moves along the chamfer portion 410 and gets over the attachment portion 410.

  Thus, the spring 100 gets over the attachment part 410 on the boke ring 4 side without pulling the engaging part 140 on the spring 100 side to the outer diameter side. Therefore, the engaging part 140,410 of the spring 100 and the baux ring 4 is smoothly engaged only by pushing in the boke ring 4 from the x-axis positive direction side, and the assembling property is improved.

  In addition, since the chamfered slope 420 is chamfered at a position where it comes into contact with the spring 100, the assemblability is further improved.

[Assembly procedure-4]
FIG. 15 is a view in which the other baux ring 4 is assembled from the x-axis negative direction side. The engagement between the engaging portions 140 and 410 of the spring 100 and the boke ring 4 is the same as that in FIG.

[Effect of Example 1]
(1) A gear stage having a coupling sleeve, an insert key 6, a clutch gear 3, a baux ring 4, and a sync hub 5, and a bokeling taper cone surface 41 and a clutch gear taper cone surface 31 at the time of shifting. When a relative rotation occurs between the sync hub 5 and the boke ring 4 due to the friction torque generated between them, the circumferential force due to the relative rotation is applied in the axial direction that presses the boke ring 4 against the clutch gear 3. In a transmission synchronizer including a support synchronization force generating mechanism that converts to a support synchronization force, a spring 100 that urges the insert key 6 in the outer diameter direction and urges the bokeling 4 toward the axial initial position side is provided. We decided to provide it.

  Accordingly, when the coupling sleeve 1 is in the neutral position and when the chamfers 11 and 12 of the coupling sleeve 1 and the chamfer 32 of the clutch gear 3 are engaged with each other, the baux ring 4 is returned to the neutral position to support synchronization. By combining the spring for preventing the generation of force and the spring for urging the insert key 6 in the outer diameter direction with the same spring 100, the number of parts can be reduced as compared with the case where separate springs are used.

  (2) A coupling sleeve, an insert key 6, a spring 100 that urges the insert key 6 in the outer diameter direction, a clutch gear 3, a baux ring 4, and a sync hub 5; When a relative rotation occurs between the synchro hub 5 and the baux ring 4 due to a friction torque generated between the bokeling taper cone surface 41 and the clutch gear taper cone surface 31 sometimes, the circumferential direction due to the relative rotation. In a transmission synchronization device including a support synchronization force generation mechanism that converts the force of the above to a support synchronization force in the axial direction that presses the boke ring 4 against the clutch gear 3. When the bokeling 4 moves in a direction in which it is pressed against the clutch gear 3 Spring 100 has a providing a mounting portion 410 for mounting the engaging portion 140 to deform.

  Thereby, the same effect as said (1) can be acquired.

  (3) The mounting portion 410 is provided with a chamfered slope 420 at a position overlapping with the spring 100 in the axial direction and on the side of the bokering 4 assembly direction.

  Thereby, it becomes possible to easily engage with the spring 100 simply by pushing the baux ring 4 from the x-axis direction, and the assembling property can be improved.

  (4) The chamfered inclined surface 420 is chamfered at a location where the spring 100 abuts. Thereby, assembly | attachment property can further be improved.

  (5) The spring 100 is provided with a fulcrum part 150 that is curved in the axial direction and abuts against the end face of the synchro hub 5, and the fulcrum part 150 becomes a fulcrum when the spring 100 is displaced in the x-axis direction.

  By providing a fulcrum, the entire spring 100 is prevented from moving in the axial direction when the bokeling 4 is moved in the direction in which it is pressed against the clutch gear 3, and the bokeling 4 is reliably placed in the neutral position (axial initial position). Can be returned to. Moreover, the shape of the spring 100 can be simplified by curving the spring 100 as a fulcrum.

  (7) The baux ring 4 is a pair of opposed boke rings 4, and the spring 100 is provided with the synchro hub 5 interposed therebetween and is sandwiched between the pair of boke rings 4. Only the fixed amount a was different. Thereby, it can be avoided that the pair of springs interfere with each other.

  (8) The predetermined amount a is set larger than the amount b in which the spring 100 is deformed in the radial direction by the movement of the insert key 6 (a> b). As a result, when a locking force is applied to the insert key 6, it is possible to prevent interference between the pair of opposed springs 100 and stabilize the locking force load of the insert key 6.

  (9) The spring 100 is provided with a rotation stopper 130 (stopper) that restricts circumferential movement. Accordingly, it is possible to avoid the spring 100 from rotating in the circumferential direction when the bokeling 4 moves in the direction in which the bokeling 4 is pressed against the clutch gear 3, and to reliably generate a return force with respect to the bokeling 4.

  As mentioned above, although the synchronizing device of the transmission of this invention has been demonstrated based on the Example, it is not restricted to these Examples about a concrete structure, The invention which concerns on each claim of a Claim Design changes and additions are allowed without departing from the gist.

  (6) As shown in FIG. 16, for example, the synchro hub 5 is provided with a synchro hub fulcrum 53 that protrudes in the axial direction and abuts against the spring 100. The synchro hub fulcrum 53 is formed when the spring 100 is displaced in the axial direction. It may be a fulcrum.

Thereby, the same effect as said (5) can be acquired. Further, since no fulcrum is provided on the spring 100 side, the shape of the spring 100 can be simplified.

It is an axial sectional view in the neutral state of the synchronizing device of the transmission of the present application. It is an axial front view in the neutral state of the synchronizing device of the transmission of the present application. It is a radial front view in the neutral state of the synchronizing device of the transmission of the present application. It is a radial front view in the neutral state of the synchronizing device of the transmission of the present application. 2 is a perspective view of one of a pair of springs 100. FIG. FIG. 3 is a partial perspective view of the bake ring 4. It is a fragmentary perspective view of the boke ring 4 and the synchro hub 5 in the assembled state (in the vicinity of the insert key push-up portion 110). FIG. 4 is a partial perspective view of the vicinity of an insert key push-up portion 120 and a rotation stopper 130 that are ends of a spring 100. 4 is a partial perspective view of the vicinity of an engaging portion 140 of a spring 100. FIG. FIG. 10 is a partial cross-sectional view of FIG. 9. FIG. 2 is an axial sectional view and an axial front view of a coupling sleeve 1 alone. It is an axial sectional view and an axial front view when the synchro hub 5 is assembled. It is the figure which assembled | attached the insert key 6 and the spring 100. FIG. It is the figure which assembled | attached one baux ring 4 from the x-axis positive direction side. It is the figure which assembled | attached the other baux ring 4 from the x-axis negative direction side. It is a figure which shows another Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coupling sleeve 2 Main gear 3 Clutch gear 4 Bokeh ring 5 Synchro hub 6 Insert key 8 Main shaft 11, 12 First stage chamfer 31 Clutch gear taper cone surface 32 Chamfer 40 Cam 41 Bokeh taper cone surface 42 Bokeh ring cam Surface 43 Bokeh chamfer 50 Cam 51 Key groove portion 52 Synchro hub cam surface 53 Synchro hub fulcrum portion 100 Spring 110 Insert key push-up portion 120 Insert key push-up portion 130 Rotation stopper 140 Engagement portion 150 Support point portion 410 Mounting portion 420 Chamfered slope

Claims (9)

A gear stage having a coupling sleeve, an insert key, a clutch gear, baux ring, and a sync hub;
When a relative rotation occurs between the synchro hub and the bokeh ring due to a friction torque generated between the bokeling taper cone surface and the clutch gear taper cone surface at the time of shifting, the circumferential direction due to the relative rotation A synchronizer for a transmission comprising: a support synchronizing force generating mechanism that converts the force of the above into a support synchronizing force in an axial direction that presses the baux ring against the clutch gear;
A transmission synchronizer comprising a spring for urging the insert key in an outer diameter direction and urging the baux ring toward an axial initial position. A gear stage having a coupling sleeve, an insert key, a spring that urges the insert key in the outer diameter direction, a clutch gear, baux ring, and a synchro hub;
When a relative rotation occurs between the synchro hub and the bokeh ring due to a friction torque generated between the bokeling taper cone surface and the clutch gear taper cone surface at the time of shifting, the circumferential direction due to the relative rotation A synchronizer for a transmission comprising: a support synchronizing force generating mechanism that converts the force of the above into a support synchronizing force in an axial direction that presses the baux ring against the clutch gear;
A bending portion that is curved in the axial direction is provided in the spring,
The transmission synchronizer is characterized in that the baux ring is provided with an attachment portion for attaching the curved portion so that the spring is deformed when the boke ring moves in a direction in which the boke ring is pressed against the clutch gear. The transmission synchronizer according to claim 2,
A synchronizer for a transmission, characterized in that a chamfered slope is provided on the attachment portion at a position overlapping with the spring in the axial direction and on the side of the assembly direction. The transmission synchronizer according to claim 3,
The transmission synchronizer is characterized in that the chamfered chamfer chamfers a portion in contact with the spring. The transmission synchronizer according to any one of claims 1 to 4,
The spring is provided with a spring fulcrum that curves in the axial direction and abuts against the end face of the synchro hub,
The transmission fulcrum portion serves as a fulcrum when the spring is displaced in the axial direction. The transmission synchronizer according to any one of claims 1 to 4,
The synchro hub is provided with a synchro hub fulcrum that protrudes in the axial direction and abuts against the spring.
The synchro fulcrum portion serves as a fulcrum when the spring is displaced in the axial direction.
The transmission synchronizer according to any one of claims 1 to 6,
The bowling is a pair of opposing bowling,
The spring is provided across the sync hub, and is sandwiched between the pair of baux rings from both axial sides.
The transmission synchronization device, wherein the pair of spring diameters are different from each other by a predetermined amount. The transmission synchronizer according to claim 7,
The transmission synchronization device, wherein the predetermined amount is set to be larger than an amount of deformation of the spring in a radial direction by movement of the insert key. The transmission synchronizer according to any one of claims 1 to 8,
A transmission synchronization device, wherein the spring is provided with a stopper for restricting circumferential movement.

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