JP2008144793A - Transmission synchronizer and return spring assembly method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synchronizer for a transmission that can be easily assembled and an assembling method thereof.
A coupling sleeve, a synchro hub, a pair of opposing baux rings, a clutch gear, a support synchronization force generating mechanism, a return spring, and a pair of the opposing pair provided at both ends of the return spring. A pair of engaging members configured to sandwich a bokeh ring from the outside, an engaging convex portion provided on the engaging member and engaged with a claw engaging protrusion provided on the baux ring, and the coupling In a synchronizing device of a transmission, the coupling sleeve comprising: an engaging member temporary fixing groove provided on the sleeve and temporarily engaging the engaging member by engaging a radial engaging claw of the engaging member; Thus, a notch is provided at a position overlapping with the claw engaging protrusion in the radial direction.
[Selection] Figure 3

Description

  The present invention is applied to a gear transmission for a vehicle and the like, and relates to a synchronizer for a transmission including at least a coupling sleeve, a synchro hub, baux ring, and a clutch gear, and a method for assembling a return spring.

2. Description of the Related Art Conventionally, in a transmission synchronization device, a structure has been disclosed in which a return spring is provided to return bokeling to an initial position when neutral, and a pair of assembly plates that indicate both ends of the return spring are temporarily fixed to a coupling sleeve. (For example, refer to Patent Document 1).
JP 2006-1332739 A

  However, in the above prior art, since the temporarily fixed assembly plate is assembled to the baux ring by the following procedure, the assembly is difficult.

  That is, (a) The temporarily fixed plate is pulled up in the measuring direction and removed from the groove of the coupling sleeve. (B) The assembly plate is moved between the coupling sleeve and the baux ring (while releasing in the axial direction). In the three steps of (c) engaging the assembly plate with the boke ring, the coupling sleeve blocks the engagement part between the boke ring and the assembly plate during the steps (b) and (c). This makes it difficult to see and makes assembly difficult.

  The present invention has been made paying attention to the above problems, and the object of the present invention is to synchronize a transmission that can be easily assembled by making the engaging portion of the bokeh ring and the assembly plate visible. An object is to provide an apparatus and a method for assembling the apparatus.

  In order to achieve the above object, according to the present invention, a coupling sleeve, a sync hub, a pair of opposing baux rings, a clutch gear, and a bokeling taper cone surface and a clutch gear taper cone surface during shifting are generated. When the synchro hub and the baux ring rotate relative to each other due to a small synchronous torque, the circumferential force that receives the relative rotation is converted, and this circumferential force is applied in the axial direction that presses the boke ring against the clutch gear. When the coupling sleeve is in a neutral position, and when the coupling sleeve and the clutch gear are meshed with each other, the support synchronizing force generating mechanism serving as a support synchronizing force is interposed between the pair of opposing baux rings. In addition, the baux ring is returned to the initial position while suppressing the support synchronization force, and the front A return spring that separates the bokeling taper cone surface and the clutch gear taper cone surface; and a pair of engagement members that are provided at both ends of the return spring so as to sandwich the opposing pair of baux rings from the outside; An engagement projection provided on the engagement member and engaged with a claw engagement projection provided on the baux ring, and a radial engagement claw provided on the coupling sleeve. In a transmission synchronization device including an engagement member temporary fixing groove for temporarily fixing the engagement member by engaging, the coupling sleeve is in a position overlapping with the claw engagement protrusion in the radial direction. A notch was provided.

  Accordingly, it is possible to provide a transmission synchronizer and an assembling method thereof that can be easily assembled.

  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 of FIG. 2 showing a neutral state of the synchronizing device of the first embodiment and a detailed view of a portion B. FIG. 2 is an axial front view showing a coupling sleeve and a sync hub of the synchronizing device of the first embodiment. FIG.

  The transmission synchronizer of the first embodiment includes a coupling sleeve 1, main gears 2 and 2 ', clutch gears 3 and 3', and baux rings 4 and 4 '. Moreover, the synchro hub 5, the insert key 6, the spread spring 7, the main shaft 8, the return spring 9 (return spring), and the assembly plates 10 and 10 ′ (engagement members) are provided.

  The coupling sleeve 1 is an input member for shifting operation load (manual operation force or actuator driving force), and is spline-fitted with the synchro hub 5, and rotates together with the synchro hub 5 and is movable in the axial direction. is there. A coupling chamfer (not shown) is formed on the sleeve inner surface of the coupling sleeve 1, and a shift fork is fitted in the groove on the sleeve outer surface.

  Further, coupling notches 1c (notches) for engaging the assembly plates 10 and 10 'are provided at both ends of the coupling sleeve 1 in the axial direction of the synchronizer. The coupling cutout portion 1c is a groove provided by cutting out the inner peripheral side of the coupling sleeve 1, and the assembly plates 10 and 10 ′ are engaged from the axial direction.

  The main gears 2 and 2 ′ are rotatably provided with respect to the main shaft 8, and rotate integrally with the main shaft 8 when the speed change operation is completed.

  The clutch gears 3 and 3 ′ are synchronizing members that synchronize the rotation of the main gears 2 and 2 ′ and the rotation of the synchro hub 5, and are integrally fixed to the main gears 2 and 2 ′ by press fitting or the like.

  Clutch gear taper cone surfaces 31, 31 'and clutch gear chamfers 32, 32' are formed on the clutch gears 3, 3 '. Clutch gear taper cone surfaces 31 and 31 ′ are taper-fitted with baux ring taper cone surfaces 41 and 41 ′ of baux ring 4.

  The baux rings 4, 4 ′ are synchronizing members that synchronize the rotation of the main gears 2, 2 ′ and the rotation of the synchro hub 5, are movable in the axial direction, and are relative to the synchro hub 5 in the circumferential direction by a predetermined amount. It can be rotated. The predetermined amount is a chamfer alignment movement amount of the spline teeth.

  The baux rings 4, 4 'are formed with boke ring taper cone surfaces 41, 41' taper-fitted to the clutch gear taper cone surfaces 31, 31 "and boke ring chamfers 42, 42 '. The sync hub 5 is a synchronizing member that is splined to the main shaft 8.

  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 spread springs 7 and 7 '.

  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.

  When the coupling sleeve 1 is in the neutral position and when the spline teeth of the coupling sleeve 1 and the clutch gears 3 and 3 ′ are meshed with each other, the return spring 9 is This is a return mechanism for returning the rings 4 and 4 ′ to the initial position and separating the baux ring tapered cone surfaces 41 and 41 ′ from the clutch gear tapered cone surfaces 31 and 31 ′.

  The return spring 9 is interposed between a pair of opposed bokerings 4 and 4 ′, and is formed on the outer periphery of the sync hub 5 at three positions (not shown) between spring groove portions (not shown). It is arranged at an intermediate position in the circumferential direction) and has assembly plates 10 and 10 'at both ends.

[Details of coupling cutout]
3 and 4 are perspective views of the coupling cutout portion 1c. 3 shows the assembly plate 10 before assembly, and FIG. 4 after assembly.

  The coupling sleeve 1 has a plate engaging groove 1a (engaging member temporary fixing groove) which is a circumferential groove on the inner diameter side, and the radial engaging claw 10c provided on the assembly plate 10 is connected to the plate engaging groove. Engage with la. Thus, the assembly plate 10 is engaged with the plate hooking groove 1a so as to be movable in the circumferential direction.

  A pair of assembling plates 10 and 10 'are provided at both ends of the spring of the return spring 9, and are configured to sandwich a pair of opposing baux rings 4 from the outside. 3 and 4, only one assembly plate 10 and baux ring 4 will be described.

  Convex portions protruding in the radial direction are provided at both ends of the assembly plate 10 in the axial direction of the synchronizer. One is an engaging convex portion 10 a that engages with the baux ring 4, and the other is a radial engaging claw 10 c that engages with the plate hooking groove 1 a of the coupling sleeve 1.

  As described above, the coupling notch 1c that is recessed on the outer peripheral side of the plate hooking groove 1a is located on the inner peripheral side of the coupling sleeve 1 and in a position overlapping the plate claw engaging protrusion 4f in the radial direction. Is provided. The assembly plate 10 is assembled to the coupling sleeve 1 and the baux ring 4 at the coupling notch 1c.

  The assembly plate 10 is provided with a return spring mounting elongated hole 10b and an engaging convex portion 10a. The return spring mounting elongated hole 10b opens long in the axial direction of the transmission on the inner diameter side of the assembly plate 10. On the other hand, the engaging convex portion 10 a is a convex portion having an arc shape (curved surface shape) and engages with a plate engaging convex portion fitting groove 4 d provided on the inner peripheral side of the baux ring 4.

  On the inner diameter side of the bokeh ring 4, an engagement member mounting groove 4 b (engagement member temporary fixing groove) that is recessed in the outer diameter direction is provided. On the opposite side of the sleeve 1 to the engaging member attaching groove 4b, an engaging member attaching groove 4b that is further recessed radially outward is provided, and the engaging convex portion 10a of the assembly plate 10 is engaged.

  Further, a plate claw engagement protrusion 4f (claw engagement protrusion) protruding in the axial direction of the synchronization device is provided on the opposite side of the engagement member mounting groove 4b, and the tip portion is notched in the synchronization device axial direction. Thus, the return spring insertion groove 4a is formed.

  At the time of assembly, the mounting plate 10 is moved in the circumferential direction, and the plate is engaged with the engaging member mounting groove 4b of the baux ring 4 by covering the plate claw engaging projection 4f, and is attached by the elastic force of the return spring 9. Rush.

  By providing a coupling notch 1c that is recessed on the outer peripheral side of the plate hooking groove 1a, a plate claw engaging protrusion 4f that is an engaging portion between the balk ring and the assembly plate from the coupling notch 1c. Is visible. Thereby, the assembling property when the assembling plate 10 is engaged is improved.

[Assembly procedure]
(Assembly plate temporarily fixed)
FIG. 5 is a view showing a procedure for temporarily fixing the assembly plate (temporarily fixing the assembly plate 10 to the coupling sleeve 1). FIG. 5A is a radial sectional view (AA cross section) of the synchronization device, and FIG. 5B is an axial front view. Note that (c) is a side view in the outer direction in the vicinity of the coupling notch 1c.

  The assembly plate 10 is attached to both ends of the return spring 9 and temporarily fixed to the coupling sleeve 1. The depth of the coupling notch 1c in the synchronizer axial direction is L. In the present application, the coupling cutout portion 1c communicates with the plate hooking groove 1a (assembly plate temporary fixing groove) and is provided wider than the width L of the assembly plates 10, 10 ′.

(Synchro hub assembly procedure)
FIG. 6 is a diagram showing a procedure for assembling the synchro hub 5. Like FIG. 5, (a) is radial direction sectional drawing (AA cross section), (b) shows an axial front view. In the second procedure, the synchro hub 5 is assembled to the inner periphery of the coupling sleeve 1 while the assembly plate 10 is temporarily fixed to the return spring 9 and the coupling sleeve 1.

(Insert key, spread spring assembly procedure)
FIG. 7 is a view showing a procedure for assembling the insert key 6 and the spread spring 7. (A) is radial direction sectional drawing (AA cross section), (b) shows an axial front view. The insert key 6 is inserted between the coupling sleeve 1 and the sync hub 5 from the axial direction of the synchronizer and is urged and locked by the spread spring 7.

(First and second positioning procedures: bake ring positioning)
FIG. 8 is a diagram showing a first positioning procedure (positioning of bake ring 4). (A) is radial direction sectional drawing (AA cross section), (b) shows an axial front view. FIG. 9 shows a second positioning procedure, which is the opposite procedure of FIG.

  The baux ring 4 is mounted on the inner periphery of the coupling sleeve 1 from the axial direction of the synchronizer. Simultaneously with the mounting, the coupling sleeve 10 is positioned on the outer diameter side of the boke ring 4 and overlaps with the circumferential direction. Positioning is performed by sliding 1 in the circumferential direction. As a result, the assembly plate 10 is engaged with the coupling notch 1 c of the coupling sleeve 1.

(First and second engagement procedures: assembly plate engagement)
FIG. 10 is a diagram showing a first engagement procedure (engagement of the assembly plate 10). (A) is radial direction sectional drawing (AA cross section), (b) shows an axial front view. FIG. 11 shows a second engagement procedure, which is the opposite side of FIG.

  In the fifth procedure, the assembly plate 10 is moved in the inner diameter direction and engaged with the engagement member mounting groove 4b of the boke ring 4 and assembled. This completes the assembly.

  As described above, in the present application, the coupling notch portion 1c communicates with the plate hooking groove 1a (assembly plate temporary fixing groove) and is provided wider than the width L of the assembly plates 10 and 10 ′. .

  On the other hand, in the conventional example, since the assembly plate (engagement member) needs to be released in the axial direction once, the return spring is pulled in the axial direction and an extra spring load is applied, which deteriorates the assemblability.

  As shown in the present application, the coupling notch portion 1c is communicated with the plate hooking groove 1a (assembly plate temporary fixing groove), and the assembly is temporarily fixed by providing it wider than the width L of the assembly plates 10 and 10 '. The attachment plates 10 and 10 'are moved in the circumferential direction by sliding the plate hooking groove 1a to the coupling notch 1c, and are further slid in the inner diameter direction (first and second engagement procedures).

  As a result, the assembly plates 10 and 10 ′ can be assembled to the baux rings 4 and 4 ′, and the assembly plates 10 and 10 ′ can be assembled without pulling the return spring 9 in the axial direction. Improve assembly.

[Effect of the embodiment of the present application]
(1) a coupling sleeve 1, a sync hub 5, a pair of opposing baux rings 4, a clutch gear 3,
When the synchro hub 5 and the baux ring 4 rotate relative to each other due to a minute synchronous torque generated between the bokeling tapered cone surfaces 41 and 41 'and the clutch gear tapered cone surfaces 31 and 31' during shifting, the relative rotation is reduced. A support synchronizing force generating mechanism that converts a circumferential force to be received, and uses the circumferential force as an axial support synchronizing force that presses the baux ring 4 against the clutch gear 3;
When the coupling sleeve 1 is in the neutral position and the coupling sleeve 1 and the clutch gear 3 are engaged with each other, the bokeling 4 is suppressed while suppressing the support synchronization force. A return spring 9 (return spring) that separates the bokeling taper cone surfaces 41 and 41 ′ from the clutch gear taper cone surfaces 31 and 31 ′,
A pair of assembling plates 10 and 10 '(engaging members) provided at both ends of the return spring 9 and configured to sandwich a pair of opposing baux rings 4 from the outside, and provided on the assembling plates 10 and 10'. , An engaging convex portion 10a that engages with a plate claw engaging protrusion 4f provided on the baux ring 4,
A plate hooking groove 1a (temporarily fixed to the assembly plate) that is provided on the coupling sleeve 1 and that temporarily fixes the assembly plates 10 and 10 'by engaging the radial engagement claws 10c of the assembly plates 10 and 10'. A transmission synchronizer comprising:
In the coupling sleeve 1, a coupling notch 1 c (notch) is provided at a position overlapping the plate claw engagement protrusion 4 f in the radial direction.

  As a result, the plate claw engagement protrusion 4f, which is the engagement portion between the bokeh ring and the assembly plate, can be viewed from the coupling notch 1c. Therefore, the assembling property when the assembling plate 10 is engaged can be improved.

  (2) The coupling notch 1c communicates with the plate hooking groove 1a (assembly plate temporary fixing groove) and is provided wider than the width L of the assembly plates 10 and 10 ′.

  In the conventional example, the assembly plate (engagement member) needs to be released in the axial direction once, so that the return spring is pulled in the axial direction and an extra spring load is applied, which deteriorates the assemblability.

  As shown in the present application, the coupling notch portion 1c is communicated with the plate hooking groove 1a (assembly plate temporary fixing groove), and the assembly is temporarily fixed by providing it wider than the width L of the assembly plates 10 and 10 '. The mounting plates 10 and 10 'are slid in the circumferential direction of the plate hooking groove 1a, moved to the coupling notch 1c, and further slid in the inner diameter direction, so that the mounting plates 10 and 10' 4 'can be assembled.

  As a result, it is possible to assemble the assembling plates 10 and 10 'without pulling the return spring 9 in the axial direction, and the assembling property can be improved.

(3) A synchro hub assembling procedure for assembling the synchro hub 5 to the coupling sleeve 1 while maintaining the state where the assembling plates 10 and 10 'are temporarily fixed to the coupling sleeve 1;
A key for attaching the insert key 6 and the spread spring 7 from the assembled state of the synchro hub 5 and a spring attaching procedure;
The first baux ring 4 is mounted with the insert key 6 and the spread spring 7 attached, and the first coupling notch portion 1c of the coupling sleeve 1 and the first plate claw engaging projection portion 4f are circumferential. A first positioning procedure for positioning so as to overlap with
With the assembly plates 10 and 10 ′ positioned in the first positioning procedure, the assembly plates 10 and 10 ′ are slid in the circumferential direction on the first plate hooking groove 1 a of the coupling sleeve 1 to the first coupling notch 1 c. A first engagement procedure in which, after being moved, the assembly plates 10, 10 ′ are slid in the inner diameter direction to engage the first assembly plate 10, 10 ′ with the first baux ring 4;
With the insert key 6 and the spread spring 7 attached, the second baux ring 4 'is mounted, and the second coupling notch portion 1c of the coupling sleeve 1 and the second plate claw engaging projection 4f A second positioning procedure for positioning so as to overlap the direction;
In the state of being positioned by the second positioning procedure, the assembly plates 10 and 10 'are slid in the circumferential direction on the second plate hooking groove 1a of the coupling sleeve 1 to the second coupling notch 1c. A second engagement procedure for sliding the assembly plates 10 and 10 ′ in the inner diameter direction after the movement and engaging the second assembly plates 10 and 10 ′ with the second baux ring 4 ′. It was decided.

  Thereby, the same effect as said (2) can be acquired.

  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.

The synchronization device of the present invention can be applied to a manual transmission that shifts a shift lever by a manual operation by a driver, and has a control type clutch with an engine, and the control type clutch is disconnected at the time of shifting. The present invention can also be applied to a so-called automatic MT transmission that changes speed by a motor actuator or the like.

It is the sectional view on the AA line of FIG. 2 which shows the neutral state of a synchronizer, and B section detail drawing. It is an axial front view which shows the coupling sleeve and synchro hub of a synchronizer. It is a perspective view of the coupling notch 1c (before the assembly plate 10 is assembled). It is a perspective view of the coupling notch 1c (after assembling the assembling plate 10). It is a figure which shows an assembly plate temporary fixing procedure. It is a figure which shows the synchro hub 5 assembly | attachment procedure. It is a figure which shows the insert key 6 and the spread spring 7 assembly | attachment procedure. It is a figure which shows a 1st positioning procedure (bowling 4 positioning). It is a figure which shows a 2nd positioning procedure (bowling 4 'positioning) (surface on the opposite side of FIG. 8). It is a figure which shows a 1st engagement procedure (assembly plate 10 engagement). It is a figure which shows a 1st engagement procedure (assembly plate 10 'engagement) (surface on the opposite side of FIG. 10).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coupling sleeve 1a Groove 1c Coupling notch 2, 2 Main gear 3, 3 Clutch gear 4, 4 'Bake ring 4a Return spring insertion groove 4b Engagement member installation groove 4d Plate engagement convex part fitting groove 4f Plate claw Engaging projection 5 Synchro hub 6 Insert key 7 Spread spring 8 Main shaft 9 Return spring 10, 10 'Assembly plate 10a Engaging projection 10b Long hole 10c Radial engagement pawl 31, 31' Clutch gear taper cone surface 32 , 32 'Clutch gear chamfer 41, 41' Baux ring taper cone surface 42, 42 'Boke ring chamfer

Claims (3)

A coupling sleeve,
Synchro hub,
A pair of opposing bowling rings,
Clutch gear,
When the synchro hub and the bokeh ring rotate relative to each other due to the minute synchronous torque generated between the bokeling taper cone surface and the clutch gear taper cone surface during shifting, the circumferential force that receives this relative rotation is converted. A support synchronization force generating mechanism that uses this circumferential force as an axial support synchronization force that presses the baux ring against the clutch gear;
The baux is interposed between the pair of opposed baux rings and suppresses the support synchronization force when the coupling sleeve is in a neutral position and when the coupling sleeve and the clutch gear are engaged with each other. A return spring for returning the ring to the initial position and separating the baux ring taper cone surface and the clutch gear taper cone surface;
A pair of engaging members provided at both ends of the return spring and configured to sandwich the opposing pair of baux rings from the outside;
An engagement projection provided on the engagement member and engaged with a claw engagement projection provided on the baux ring;
In the synchronization device of the transmission, comprising: an engagement member temporary fixing groove provided on the coupling sleeve and temporarily engaging the engagement member by engaging a radial engagement claw of the engagement member;
The transmission synchronization device, wherein the coupling sleeve is provided with a notch at a position that overlaps the claw engagement protrusion in the radial direction. The transmission synchronizer according to claim 1.
The transmission synchronizer is characterized in that the notch communicates with the engaging member temporary fixing groove and is wider than the engaging member. The transmission synchronizer according to claim 2,
Synchro hub assembly procedure for assembling the synchro hub to the coupling sleeve while maintaining the state where the engagement member is temporarily fixed to the coupling sleeve;
A key for attaching an insert key and a spread spring from the assembled state of the synchro hub and a spring attaching procedure;
The first baux ring is mounted with the insert key and the spread spring attached, and the first notch of the coupling sleeve is positioned so as to overlap with the first claw engaging protrusion. A first positioning procedure to:
After the engagement member is slid in the circumferential direction on the first engagement member temporary fixing groove of the coupling sleeve and moved to the first notch in the state of being positioned by the first positioning procedure, A first engagement procedure for sliding the engagement member in an inner diameter direction to engage the first engagement member with the first baux ring;
The second baux ring is mounted with the insert key and the spread spring attached, and the second notch of the coupling sleeve is positioned so as to overlap the second claw engaging protrusion. A second positioning procedure to:
After the engagement member is slid in the circumferential direction on the second engagement member temporary fixing groove of the coupling sleeve and moved to the second notch in the state of being positioned by the second positioning procedure, A second engagement procedure in which an engagement member is slid in an inner diameter direction to engage the second engagement member with the second baux ring;
A return spring assembling method characterized by comprising:

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