JP2004076811A - Synchronous joining device of transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of part items of a synchronous joining device of a transmission. <P>SOLUTION: When moving a sleeve 13 slidingly supported by a hub 12 fixed to a transmission shaft 11 in the leftward direction, a projecting part 16b formed on an inner peripheral spline tooth 16 of the sleeve 13 presses a synchronous spring 25b in the leftward direction, and a tapered surface 25a of a blocking ring 25 is pressed to a tapered surface 24a of a tapered cone 24 fixed to a transmission case so that a retreat shift stage can be smoothly established by braking the transmission shaft 11 for rotating by inertia. Since the synchronous spring 25b for smoothly establishing the retreat shift stage is integrally formed with the blocking ring 24, the number of part items and installation manhours can be reduced more than when constituting these members of a separate member. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a synchronous coupling device for a transmission that brakes the rotation of a transmission shaft due to inertia via a sleeve that is movable in an axial direction so as to smoothly establish a reverse gear.
[0002]
[Prior art]
Such a synchronous coupling device for a transmission moves a sleeve slidably supported on a hub fixed to a transmission shaft in one axial direction, so that a gear relatively rotatably supported on the transmission shaft is fixed to a blocking ring and a synchro spring. The tapered cone fixed to the transmission case is synchronized with the blocking ring and the synchro spring by connecting the sleeve to the sleeve while establishing the synchronizing action and establishing a predetermined forward gear, and moving the sleeve in the other axial direction. The transmission shaft, which is coupled to the sleeve while exerting the power, brakes the transmission shaft that rotates by inertia, and in the meantime, the reverse gear supported by the transmission shaft meshes with the reverse idle gear to establish the forward gear.
[0003]
Conventionally, the blocking ring and the synchro spring for establishing the reverse gear are formed of separate members, and this has caused an increase in the number of parts and an increase in the number of assembling steps.
[0004]
[Problems to be solved by the invention]
By the way, it is desired to simplify the structure in order to reduce the production cost of the synchronous coupling device, and as a means to reduce the number of parts by integrating a plurality of parts for establishing the reverse gear into one part. It is possible to make it.
[0005]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to reduce the number of components of a synchronous coupling device of a transmission and to prevent a noise at the time of establishing a reverse gear.
[0006]
[Means for Solving the Problems]
To achieve the above object, according to the first aspect of the present invention, a gear having dog teeth on an outer periphery and rotatably supported on a transmission shaft and being disposed coaxially with the transmission shaft. The taper cone fixed to the case, the hub connected to the transmission shaft at the position between the taper cone and the gear, the sleeve spline-coupled to the hub so that it can move in the axial direction, and the spline teeth on the inner circumference of the sleeve can mesh And a first blocking ring arranged between the hub and the gear by frictional engagement with the gear, and transmitting the axial movement of the sleeve to the first blocking ring. A first synchro spring is disposed between the hub and the tapered cone to allow frictional engagement with the tapered cone. A second blocking ring; and a second synchro spring for transmitting the movement of the sleeve in the other axial direction to the second blocking ring. When the forward shift speed is established, the sleeve is moved in one of the axial directions. By pressing the first synchro spring to one side in the axial direction with the spline teeth on the inner circumference, the first blocking ring is pressed against the gear by the first synchro spring to frictionally engage with the spline teeth on the inner circumference of the sleeve. Is engaged with the dog teeth on the outer periphery of the first blocking ring and the dog teeth on the outer periphery of the gear to couple the gear to the transmission shaft, and when the reverse gear is established, the inside of the sleeve is moved with the movement of the sleeve in the other axial direction. By pressing the second synchro spring toward the other side in the axial direction with the peripheral spline teeth, the second synchro spring is pressed. In a transmission synchronous coupling device for braking a transmission shaft rotating by inertia by pressing a second blocking ring against a tapered cone with a frictional engagement, a second synchro spring is formed integrally with the second blocking ring. Is proposed.
[0007]
According to the above configuration, the sleeve supported by the hub coupled to the transmission shaft is moved in one axial direction, so that the first blocking ring is pressed against the gear via the first synchro spring to exert a synchronizing action. The gear is connected to the transmission shaft to smoothly establish the forward gear, and the sleeve is moved to the other side in the axial direction, so that the second blocking ring is pressed against the tapered cone via the second synchro spring to synchronize. While exerting the rotation, the rotation due to the inertia of the transmission shaft is braked by the tapered cone, so that the reverse gear can be smoothly established and the noise can be prevented. Since the second synchro spring for smoothly establishing the reverse gear is integrally formed with the second blocking ring, the number of parts and the number of assembling steps can be reduced as compared with the case where they are formed by separate members.
[0008]
According to the second aspect of the present invention, in addition to the configuration of the first aspect, the second synchro spring is formed by cutting and raising a plurality of circumferential portions of an outer peripheral portion of the second blocking ring radially outward. A synchronous coupling device for a transmission is proposed.
[0009]
According to the above configuration, a plurality of circumferential portions of the outer peripheral portion of the second blocking ring are cut and raised outward in the radial direction to form the second synchro spring, so that the second synchro spring can be formed by simple processing. .
[0010]
According to a third aspect of the present invention, in addition to the configuration of the first aspect, the first synchronous spring and the second synchronous spring are formed integrally with the second blocking ring. An apparatus is proposed.
[0011]
According to the above configuration, since the first synchro spring and the second synchro spring are formed integrally with the second blocking ring, the number of parts can be further reduced as compared with the case where the first synchro spring is formed as a separate member.
[0012]
According to the fourth aspect of the present invention, in addition to the configuration of the third aspect, the second synchro spring is pivoted toward the first blocking ring from a plurality of circumferential positions on the outer peripheral portion of the second blocking ring. A cam formed on spline teeth on the inner periphery of the sleeve by extending the first synchro spring further in the axial direction through a cam ridge projecting radially outward from the tip of the second synchro spring. A synchronous coupling device for a transmission, characterized in that a groove is engaged with the cam ridge, is proposed.
[0013]
According to the above configuration, the second synchro spring, the cam ridge, and the first synchro spring extend in one axial direction toward the first blocking ring from a plurality of circumferential positions on the outer peripheral portion of the second blocking ring. , The second synchro spring, the cam ridge and the first synchro spring can be formed compactly. Moreover, since the cam grooves formed in the spline teeth on the inner periphery of the sleeve are engaged with the cam ridges, the first and second synchro springs can be axially moved only by changing the shape of the cam ridges and the shape of the cam grooves. The timing and strength of pressing can be set arbitrarily to exert an optimal synchronizing action.
[0014]
According to a fifth aspect of the present invention, in addition to the configuration of the fourth aspect, the transmission of the present invention is characterized in that the spline teeth on the inner periphery of the sleeve have a constant height in the circumferential direction and the axial direction. A coupling device is proposed.
[0015]
According to the above configuration, since the tooth height of the spline teeth on the inner circumference of the sleeve is constant in the circumferential direction and the axial direction, not only the processing cost of the sleeve can be reduced, but also the quality control of the sleeve becomes easy.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings.
[0017]
1 to 5 show a first embodiment of the present invention. FIG. 1 is a longitudinal sectional view (corresponding to a sectional view taken along line 1-1 in FIG. 3) showing a synchronous coupling device of a manual transmission, and FIG. FIG. 3 is a longitudinal sectional view showing a synchronous coupling device of the transmission (corresponding to a sectional view taken along line 2-2 in FIG. 3), FIG. 3 is a front view of a second blocking ring, and FIG. FIG. 5 is an operation explanatory view showing a state in which the reverse gear is established.
[0018]
FIGS. 1 and 2 show a fifth-reverse synchronous coupling device S of a manual transmission for a vehicle. The synchronous coupling device S is for selectively establishing a fifth speed and a reverse speed, and is provided with a spline slidably in the axial direction on an outer periphery of an annular hub 12 spline-coupled to a transmission shaft (main shaft) 11. It has a coupled sleeve 13. The sleeve 13 is driven left and right from a neutral position shown by a shift fork 14, and establishes a fifth gear by moving to the fifth gear position on the right, and establishes a reverse gear by moving to the reverse position on the left.
[0019]
Spline teeth 15 are formed on the outer periphery of the hub 12, and spline teeth 16 formed on the inner periphery of the sleeve 13 and meshing with the spline teeth 15 of the hub 12 have the following two types of shapes. That is, the majority of the spline teeth 16 of the sleeve 13 have a linear top surface (see FIG. 2), but two spline teeth 16 are arranged at three places separated by 120 ° about the axis of the transmission shaft 11. The total of six spline teeth 16 provided with protrusions 16a and 16b projecting radially inward at both ends in the axial direction (see FIG. 1).
[0020]
On the right side of the hub 12, a gear 19 is rotatably supported on the outer periphery of the transmission shaft 11 via a collar 17 and a needle bearing 18, and a first blocking ring is formed in an annular concave portion 12a formed on the right side surface of the hub 12. 20 are arranged. The first blocking ring 20 has a tapered surface 20 a formed radially inward and faces the gear 19 so as to be able to contact a tapered surface 19 a formed radially outward. Dog teeth 19b, 20b are formed on the outer peripheral surface of the gear 19 and the outer peripheral surface of the first blocking ring 20, respectively, and an annular ring is formed between the spline teeth 15 of the hub 12 and the dog teeth 20b of the first blocking ring 20. The first synchro spring 21 is arranged.
[0021]
The transmission shaft 11 is rotatably supported by a transmission case (not shown) via a ball bearing 22. By disposing a collar 23 between the inner race 22 a of the ball bearing 22 and the hub 12, the transmission shaft 11 The axial position of the hub 12 is regulated. The right end of a tapered cone 24 fixed between the transmission case and the outer race 22b of the ball bearing 22 extends into a concave portion 12b formed on the left side surface of the hub 12, and is formed in an annular second blocking shape so as to surround the outer periphery thereof. A ring 25 is arranged.
[0022]
3, the annular second blocking ring 25 is formed by pressing a metal plate into a U-shaped cross section and heat-treating the metal plate. The tapered surface 25a formed inward in the radial direction has a tapered surface 25a. The tapered cone 24 is opposed to a tapered surface 24a formed radially outward on a right end outer peripheral surface of the tapered cone 24. Three second synchro springs 25b are radially outwardly protruded at three locations spaced apart by 120 ° in the circumferential direction of the second blocking ring 25. The plurality of positioning step portions 25c protrude radially outward.
[0023]
The three second synchro springs 25b are opposed to the protrusions 16b on the left side of the spline teeth 16 of the sleeve 13 so as to be engageable (see FIG. 1), and the three positioning step portions 24c are the teeth of the spline teeth 15 of the hub 12. The groove engages with the concave portion 12c in which the groove is cut inward in the radial direction to restrict the rotation of the second blocking ring 25 (see FIG. 2).
[0024]
Next, the operation of the first embodiment of the present invention having the above configuration will be described.
[0025]
As shown in FIG. 1, when the sleeve 13 is in the neutral position, the right convex portion 16 a of the spline teeth 16 on the inner circumference of the sleeve 13 does not contact the first synchro spring 21 and the tapered surface of the first blocking ring 20. 20a and the tapered surface 19a of the gear 19 can freely rotate relative to each other without being in close contact with each other, and no synchronizing action occurs. The left convex portion 16b of the spline teeth 16 on the inner periphery of the sleeve 13 does not contact the second synchro spring 25b, and the tapered surface 25a of the second blocking ring 25 and the tapered surface 24a of the tapered cone 24 do not adhere to each other. It is freely rotatable relative to each other and no synchronizing action occurs.
[0026]
When the sleeve 13 is moved rightward with respect to the hub 12 to establish the fifth speed from this state, the right-side convex portion 16 a of the spline teeth 16 on the inner periphery of the sleeve 13 Press three places in the radial direction inward. Then, the synchro spring 21 receives an axial rightward load due to the frictional force between the convex portion 16 a and the rightward biasing of the first blocking ring 20 toward the gear 19, so that the tapered surface of the first blocking ring 20. 20a and the tapered surface 19a of the gear 19 come into close contact with each other to generate a frictional force. As a result, the first blocking ring 20 is integrated with the gear 19 by the frictional force, and the rotation of the gear 19 is synchronized with the rotation of the hub 12 and the sleeve 13. Therefore, when the sleeve 13 is moved rightward, the spline teeth 16 are formed. When the dog 13 meshes with the dog teeth 20b of the first blocking ring 20 and complete synchronization is completed, and when the sleeve 13 is further moved rightward, the spline teeth 16 smoothly mesh with the dog teeth 19b of the gear 19 to establish the fifth speed. I do.
[0027]
The synchronizing operation of the first synchro spring 21 in establishing the fifth speed is conventionally well known.
[0028]
As shown in FIG. 4, when the sleeve 13 is moved leftward with respect to the hub 12 to establish the reverse gear, the left convex portion 16 b of the spline teeth 16 on the inner periphery of the sleeve 13 is moved to the second blocking ring 25. And presses the three second synchro springs 25b formed integrally. Then, the second synchro spring 25b pressed by the convex portion 16b receives a load leftward in the axial direction and urges the second blocking ring 25 leftward toward the tapered cone 24, so that the tapered surface of the second blocking ring 25 is formed. 25a and the tapered surface 24a of the tapered cone 24 come into close contact with each other to generate a frictional force. As a result, the transmission shaft 11 that is about to rotate by inertia is integrated with the transmission case via the hub 12, the second blocking ring 25, and the tapered cone 24 and braked, and the reverse gear provided on the transmission shaft 11 is driven in reverse idle. The reverse gear is established without engaging the gears and generating a noise.
[0029]
As shown in FIG. 5, when the sleeve 13 moves further rightward and the reverse gear is completely established, the left convex portion 16b of the spline teeth 16 on the inner periphery of the sleeve 13 rides over the second synchro spring 25b. Therefore, the close contact between the tapered surface 25a of the second blocking ring 25 and the tapered surface 24a of the tapered cone 24 is released, the frictional force disappears, and the rotation of the transmission shaft 11 during establishment of the reverse gear can be performed without any trouble. it can.
[0030]
As described above, according to the first embodiment, since the second blocking ring 25 and the second synchro spring 25b for smoothly establishing the reverse gear are integrally formed as the same member, they are formed as separate members. This can contribute to a reduction in the number of parts as compared with the case. Moreover, since the second blocking ring 25 and the second synchro spring 25b can be easily produced only by press-forming and heat-treating a sheet metal, production costs can be reduced. In particular, since the outer peripheral portion of the second blocking ring 25 is cut and raised to form the second synchronization spring 25b, the second synchronization spring 25b can be easily formed.
[0031]
6 to 11 show a second embodiment of the present invention. FIG. 6 is a longitudinal sectional view showing a synchronous coupling device of a manual transmission, FIG. 7 is a front view of a second blocking ring, and FIG. FIG. 9 is an operation explanatory view showing a state in which a fifth speed is established, FIG. 10 is an operation explanatory view showing a process in which a reverse gear is established, and FIG. 11 is a state in which a reverse gear is established. FIG. In the second embodiment, members corresponding to those of the above-described first embodiment are denoted by the same reference numerals as those in the first embodiment, and redundant description will be omitted.
[0032]
As shown in FIGS. 6 to 8, the synchronous coupling device S of the second embodiment does not include the separate first synchro spring 21 of the first embodiment. The synchro spring 25e and the second synchro spring 25b are formed integrally. That is, positioning step portions 25c projecting outward in the radial direction are formed at two locations 180 ° apart in the circumferential direction of the second blocking ring 25, and these positioning step portions 25c are cut out to form a plate-shaped second step. Two synchro springs 25b are formed integrally. Further, a mountain-shaped (triangular) cam ridge 25d projecting outward in the radial direction is formed integrally with the right end of the second synchro spring 25b, and a first synchro spring 25e projecting rightward is integrally formed with the right end of the cam ridge 25d. Formed.
[0033]
The rotation of the second blocking ring 25 is regulated by engaging the positioning step 25 c with the recess 12 c of the hub 12. The height of the spline teeth 16 on the inner periphery of the sleeve 13 is uniform in the circumferential direction and the axial direction, and does not include the convex portions 16a and 16b of the first embodiment. An intermediate (triangular) cam groove 16c into which the cam ridge 25d is fitted is formed in the middle. The first synchro spring 25e bent inward in the radial direction faces the left side surface of the first blocking ring 20 so as to be able to abut.
[0034]
Next, the operation of the second embodiment of the present invention having the above configuration will be described.
[0035]
As shown in FIG. 6, when the sleeve 13 is in the neutral position, the first and second synchro springs 25e and 25b in which the cam ridges 25d are engaged with the cam grooves 16c of the spline teeth 16 on the inner periphery of the sleeve 13 are also in neutral. In position. Therefore, the first blocking ring 20 to which the load from the first synchro spring 25e does not act is freely rotatable relative to the gear 19, and the synchronizing action of the sleeve 13 and the gear 19 does not occur. Further, the second blocking ring 25 to which the load from the second synchro spring 25b does not act is freely rotatable relative to the tapered cone 24, and no synchronizing action of the sleeve 13 and the tapered cone 24 occurs.
[0036]
When the sleeve 13 is moved rightward with respect to the hub 12 in order to establish the fifth speed, the cam groove 16c of the spline teeth 16 on the inner periphery of the sleeve 13 presses the cam ridge 25d and receives a rightward load. Since the first synchro spring 25e urges the first blocking ring 20 rightward, the tapered surface 20a of the first blocking ring 20 comes into close contact with the tapered surface 19a of the gear 19 to generate a frictional force. Is synchronized with the rotation of the sleeve 13. When the sleeve 13 further moves rightward while the rotation of the gear 19 is synchronized with the rotation of the sleeve 13, the spline teeth 16 of the sleeve 13 become the dog teeth 20 b of the first blocking ring 20 and the dog teeth of the gear 19. The fifth gear is established by smoothly meshing with the gear 19b (see FIG. 9).
[0037]
When the sleeve 13 is moved leftward with respect to the hub 12 to establish the reverse gear, as shown in FIG. 10, the cam groove 16c of the spline teeth 16 on the inner periphery of the sleeve 13 presses the cam ridge 25d, Since the second synchro spring 25b receiving the leftward load urges the second blocking ring 25 leftward, the tapered surface 25a of the second blocking ring 25 comes into close contact with the tapered surface 24a of the tapered cone 24, and the frictional force is reduced. As a result, the transmission shaft 11 is coupled to the fixed taper cone 24 and the rotation due to inertia is braked. The gear stage is established.
[0038]
As shown in FIG. 11, when the sleeve 13 further moves to the left and the reverse gear is completely established, the cam groove 16c of the spline teeth 16 on the inner periphery of the sleeve 13 goes over the cam ridge 25d. 25d is not pushed to the left only by being pushed inward in the radial direction, the taper surface 25a of the second blocking ring 25 and the taper surface 24a of the taper cone 24 are released from close contact, frictional force disappears, and the reverse gear The rotation of the transmission shaft 11 during the establishment can be performed without any trouble.
[0039]
As described above, according to the second embodiment, the cam ridge 25d and the first synchro spring 25e for the fifth speed are integrally provided on the right side of the second synchro spring 25b for the reverse speed, so that they are compact. And contribute to further reduction of the number of parts. Moreover, the second blocking ring 25 including the first and second synchro springs 25e and 25b and the cam ridges 25d can be easily produced only by press-forming and heat-treating the sheet metal, so that the production cost can be reduced.
[0040]
Further, the sleeve 13 of the first embodiment needs to form convex portions 16a and 16b projecting radially inward at both ends in the axial direction of the specific spline teeth 16, so that there is a problem that the processing cost increases. The spline teeth 16 of the sleeve 13 of the second embodiment have uniform tooth heights in the circumferential and axial directions, and the machining of the cam grooves 16c is much easier than the machining of the convex portions 16a and 16b. Therefore, not only quality control is easy, but also it can contribute to reduction of production cost.
[0041]
Also, the first and second synchro springs 25e and 25b can be changed only by changing the thickness, width, height, angle, and the like of the cam ridge 25d, or the depth, angle, and the like of the cam groove 16c of the spline teeth 16 of the sleeve 13. The timing and strength of pressing in the axial direction can be set arbitrarily, and a stable synchronizing action against vibration and the like can be exhibited.
[0042]
The embodiments of the present invention have been described above. However, various design changes can be made in the present invention without departing from the gist thereof.
[0043]
For example, the second blocking ring 25 is not limited to a press-formed product, but may be a sintered product or a cast product, and its material may be any of iron, copper, and aluminum.
[0044]
【The invention's effect】
As described above, according to the first aspect of the invention, by moving the sleeve supported by the hub coupled to the transmission shaft in one axial direction, the first blocking ring is connected to the gear via the first synchronization spring. The gear is connected to the transmission shaft by the sleeve while pressing and exerting the synchronizing action to smoothly establish the forward gear, and the sleeve is moved to the other side in the axial direction, so that the second blocking is performed via the second synchro spring. While the ring is pressed against the tapered cone to exert a synchronizing action, the rotation due to the inertia of the transmission shaft is braked by the tapered cone, so that the reverse gear can be smoothly established and noise can be prevented. Since the second synchro spring for smoothly establishing the reverse gear is integrally formed with the second blocking ring, the number of parts and the number of assembling steps can be reduced as compared with the case where they are formed by separate members.
[0045]
According to the second aspect of the present invention, since a plurality of circumferential portions of the outer peripheral portion of the second blocking ring are cut and raised outward in the radial direction, the second synchro spring is formed. It can be formed by processing.
[0046]
According to the third aspect of the present invention, since the first synchro spring and the second synchro spring are formed integrally with the second blocking ring, the number of parts is reduced as compared with the case where the first synchro spring is formed as a separate member. Further reductions can be made.
[0047]
Further, according to the invention described in claim 4, the second synchro spring, the cam ridge and the first synchro spring are axially moved toward the first blocking ring from a plurality of circumferential positions on the outer peripheral portion of the second blocking ring. Since it is extended to one side, the second synchro spring, the cam ridge and the first synchro spring can be formed compactly. Moreover, since the cam grooves formed in the spline teeth on the inner periphery of the sleeve are engaged with the cam ridges, the first and second synchro springs can be axially moved only by changing the shape of the cam ridges and the shape of the cam grooves. The timing and strength of pressing can be set arbitrarily to exert an optimal synchronizing action.
[0048]
According to the fifth aspect of the present invention, the spline teeth on the inner circumference of the sleeve have a constant height in the circumferential direction and the axial direction, so that not only the processing cost of the sleeve can be reduced, but also the sleeve can be reduced. Quality control becomes easier.
[Brief description of the drawings]
1 is a longitudinal sectional view showing a synchronous coupling device of a manual transmission (corresponding to a sectional view taken along line 1-1 in FIG. 3);
FIG. 2 is a longitudinal sectional view showing a synchronous coupling device of a manual transmission (corresponding to a sectional view taken along line 2-2 in FIG. 3);
FIG. 3 is a front view of a second blocking ring; FIG. 4 is an operation explanatory view showing a process of establishing a reverse gear; FIG. 5 is an operational explanatory view showing a state where a reverse gear is established; FIG. FIG. 7 is a longitudinal sectional view showing a synchronous coupling device of a manual transmission according to an example. FIG. 7 is a front view of a second blocking ring. FIG. FIG. 10 is an operation explanatory diagram showing a process of establishing a reverse gear. FIG. 11 is an operational explanatory diagram showing a state where a reverse gear is established.
11 transmission shaft 12 hub 13 sleeve 16 spline teeth 16c cam groove 19 gear 19b dog tooth 20 first blocking ring 20b dog tooth 21 first synchro spring 24 taper cone 25 second blocking ring 25b second synchro spring 25d cam ridge 25e first Synchro spring

Claims (5)

A gear (19) having dog teeth (19b) on its outer periphery and rotatably supported on the transmission shaft (11);
A tapered cone (24) arranged coaxially with the transmission shaft (11) and fixed to the transmission case;
A hub (12) coupled to the transmission shaft (11) at a position sandwiched between the tapered cone (24) and the gear (19);
A sleeve (13) spline-connected to the hub (12) so as to be axially movable;
The hub (12) and the gear (19) are provided with dog teeth (20b) on the outer periphery capable of meshing with spline teeth (16) on the inner periphery of the sleeve (13) and enabling frictional engagement with the gear (19). A first blocking ring (20) disposed therebetween;
A first synchro spring (21, 25e) for transmitting the axial movement of the sleeve (13) to the first blocking ring (20);
A second blocking ring (25) positioned between the hub (12) and the tapered cone (24) to enable frictional engagement with the tapered cone (24);
A second synchro spring (25b) for transmitting the axial movement of the sleeve (13) to the second blocking ring (25);
With
When the forward gear is established, the first synchro springs (21, 25e) are moved in the axial direction by the spline teeth (16) on the inner periphery of the sleeve (13) as the sleeve (13) moves in one axial direction. By pressing, the first blocking ring (20) is pressed against the gear (19) by the first synchro springs (21, 25e) so as to frictionally engage with the spline teeth (16) on the inner circumference of the sleeve (13). ) Is engaged with dog teeth (20b) on the outer periphery of the first blocking ring (20) and dog teeth (19b) on the outer periphery of the gear (19) to couple the gear (19) to the transmission shaft (11), and When the step is established, the second synchro spring (25b) is moved by the spline teeth (16) on the inner periphery of the sleeve (13) as the sleeve (13) moves in the other axial direction. By pressing in the other direction, the second blocking ring (25) is pressed against the tapered cone (24) by the second synchro spring (25b) to frictionally engage, and the transmission shaft (11) rotating by inertia is braked. In the synchronous coupling device of the transmission,
A synchronous coupling device for a transmission, wherein the second synchro spring (25b) is formed integrally with the second blocking ring (25). The transmission synchronization according to claim 1, wherein the second synchro spring (25b) is formed by cutting and raising a plurality of circumferential portions of an outer peripheral portion of the second blocking ring (25) radially outward. Coupling device. The transmission synchronous coupling device according to claim 1, wherein the first synchronization spring (25e) and the second synchronization spring (25b) are formed integrally with the second blocking ring (25). A second synchro spring (25b) is extended in one axial direction toward the first blocking ring (20) from a plurality of circumferential positions on the outer peripheral portion of the second blocking ring (25). The first synchro spring (25e) is further extended in one axial direction through a cam ridge (25d) projecting radially outward from the tip of 25b) to form a spline tooth (16) on the inner periphery of the sleeve (13). The synchronous coupling device according to claim 3, wherein the cam groove (16c) is engaged with the cam ridge (25d). 5. The synchronous coupling device according to claim 4, wherein the tooth height of the spline teeth on the inner circumference of the sleeve is constant in the circumferential direction and the axial direction.

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