JPH10267123A - Shift operation device for transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the rotation of a shift rod and particularly regulate the rotation of the shift rod for operating a synchronizer through an inverting mechanism without deteriorating a productivity, raising a cost or lowering a layout property. SOLUTION: In order to regulate the rotation of shift rods 7, 8 and 9 for operating a synchronizer through an inverted shift fork, overlaying part 32e1, 32e2; 33e; and 34e are provided in, for example, the mutually adjacent side surface parts of engaging members 32, 33 and 34 fixed to the rear end parts of the shift rods 7, 8 and 9 and pairs of rotation regulating surfaces 32f1, 32f; and 32f2, 34f substantially perpendicular to a plane including the respective axes of the shift rods 7, 8 and 9 for regulating the rotation mutually are formed respectively on the mutually adjacent overlaying parts. Otherwise, rotation regulating members are fixed to the intermediate parts of the shift rods 7, 8 and 9 so as to set similar rotation regulating surfaces, separately from the engaging members 32, 33 and 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift operating device for a transmission mounted on a vehicle, and more particularly, to a manual type, in which a plurality of shift rods for operating a plurality of synchronizing devices are arranged in parallel with each other, and at least one shift rod is provided. The present invention relates to a shift operation device of a transmission configured such that a shift rod operates a synchronization device via a reversing mechanism.

[0002]

2. Description of the Related Art A manual type gear type transmission mounted on a vehicle includes, for example, an input shaft and an output shaft, and a counter shaft arranged in parallel with both of these shafts in a case of an engine vertically mounted FR vehicle. A plurality of transmission gear pairs provided in pairs with the input shaft, the output shaft, and the counter shaft corresponding to each speed position and meshing with each other, and a reverse gear pair disposed in parallel with the input shaft and the output shaft. A reverse idle shaft that supports a reverse idle gear provided between the drive gear and the drive gear; and a predetermined shift gear pair corresponding to the selected shift speed, the output shaft from the input shaft via the counter shaft or directly. So that power is transmitted to And a power transmission switching mechanism for switching the transmission path, is configured to operate the sync device for a power transmission switching mechanism via a shift rod by the shift lever.

[0003] In such a transmission, the synchronizer connects one of the front and rear idler gears rotatable relative to the shaft so as to selectively rotate integrally therewith.
A synchronizer hub fitted and fixed to the shaft, a synchronizer key provided on the outer periphery of the synchronizer hub, and a pair of front and rear synchronizer rings;
A gear-side ring member arranged opposite to each synchronizer ring, and a synchronizer sleeve located outside the synchronizer key and movable by a shift fork linked to each shift rod arranged in parallel with each other, comprising a synchronizer sleeve. In general, any one of the idler gears is connected and integrally rotated according to the movement.

A shift operation system of such a gear type transmission has a structure in which a shift fork is fixedly incorporated in a shift rod and the movement of the shift rod is transmitted as it is. Arms are supported by a pair of reversing fulcrums at the intermediate portion where they are coaxial with each other, and a reversing type shift fork that reverses and transmits the movement of the shift rod is used. There is known an arrangement for achieving this.

When the shift fork is fixedly incorporated into the shift rod, the rotation of the shift rod is restricted by the shift fork. However, when the inversion type shift fork is used, the shift rod is fixed by the shift fork. Since the rotation is not restricted, the shift rod is rotated by the operation of the shift lever or the vibration of the transmission as it is, and the shift rod and the shift lever or the shift rod and the shift fork do not normally mesh with each other. There is a risk that the shifting operation cannot be performed. In view of the above, measures have conventionally been considered. For example, as shown in Japanese Patent Application Laid-Open No. 62-62042, another shift rod adjacent to a specific shift rod that operates a synchronizer via a reversing mechanism is used. There is known a structure in which a rotation restricting member for restricting the rotation of a specific shift rod by slidably holding the rod is provided. In addition, it has been considered to provide a rotation restricting portion on the casing side of the transmission.

[0006]

As described above, the technology for regulating the rotation of the shift rod that operates the synchronization device via the reversing mechanism includes a specific shift rod that operates the synchronization device via the reversing mechanism. Some include a rotation restricting member that restricts the rotation of the specific shift rod by slidably engaging with another adjacent shift rod,
In some cases, a rotation restricting portion is provided on the casing side. However, if the rotation restricting portion is provided on the casing of the transmission, the productivity is inevitably deteriorated. In the provision of the rotation regulating member that regulates the rotation of the shift rod, if there is not one shift rod that must regulate the rotation, a separate rotation regulating member will be provided for each shift rod, As the number of parts increases and the configuration becomes complicated,
This increases the cost and worsens the layout.

Therefore, the productivity is not deteriorated,
It is an object to reduce the rotation of the shift rod without increasing the cost or deteriorating the layout, and in particular, to be able to regulate the rotation of the shift rod that operates the synchronization device via the reversing mechanism.

[0008]

According to a first aspect of the present invention, there is provided a shift operation device for a transmission, wherein a plurality of shift rods for operating a synchronization device are arranged in parallel with each other, and at least one shift rod and the shift rod operate. In a shift operation device of a transmission having a reversing mechanism interposed between the synchronizer and a shift rod that operates the synchronizer via the reversing mechanism,
Rotation restricting means is provided between adjacent shift rods to set a pair of rotation restriction surfaces substantially orthogonal to a plane including the axes of both shift rods.

According to the above construction, the shift rod for operating the synchronization device via the reversing mechanism and the adjacent shift rod mutually rotate in the direction of rotation by the rotation regulating surface substantially perpendicular to the plane including the axes of both shift rods. , The rotation of the shift rod that operates the synchronization device via the reversing mechanism is restricted. In addition, the rotation restricting means in this case sets a rotation restricting surface that is substantially perpendicular to the plane including the axes of the two shift rods, and has a configuration different from the conventional one that clamps adjacent shift rods. It is simple, and when the shift rods operating the synchronizer via the reversing mechanism are adjacent to each other, the rotation of both shift rods can be restricted by one rotation restricting means, thus reducing the number of parts and the configuration Can be simplified, the cost can be reduced, and the layout can be improved. Further, the productivity can be improved as compared with the case where the rotation regulating portion is provided on the casing side.

According to a second aspect of the present invention, there is provided a speed change operation device for a transmission, wherein the rotation restricting means is constituted by a member different from the shift rod in the above-described first aspect. The rotation restricting means can be made of a member different from the shift rod as described above, and in that case, processing for forming a rotation restricting surface on the shift rod is unnecessary, and productivity is increased.

According to a third aspect of the present invention, there is provided a speed change operating device for a transmission, wherein
The shift rod is integrally formed with an engagement member on the shift rod side for engaging the shift lever with the shift lever. In this way, the rotation restricting means can be integrally formed with the shift rod side engaging member for engaging the shift rod with the shift lever. In this case, the rotation restricting means does not need to be formed as a separate member, Points can be reduced.

Further, a transmission operation device for a transmission according to claim 4 applies the configuration according to claim 1 to a case where all the shift rods operate the synchronization device via the reversing mechanism. is there. In this case, the rotation restricting means may set the number of rotation restriction surfaces one less than the number of shift rods. For example, when the number of shift rods is three, the number of pairs of rotation regulating surfaces may be two.

According to a fifth aspect of the present invention, there is provided a transmission operating device for a transmission, wherein an engaging member provided on a shift rod side for engaging the shift rod with the shift lever is provided with a resilient force when the shift lever is not operated. A shift operating device of a transmission integrally provided with a select return mechanism for holding a lever position at a neutral position in a select direction, wherein the select return mechanism is set so that the direction of resilient force passes through the center of the shift rod. It is. In this case, when the shift lever is not operated, the resilient force of the select return mechanism that holds the lever position at the neutral position in the select direction passes through the center of the shift rod, thereby preventing the select return mechanism from generating a rotational moment on the shift rod. In addition, the rotation of the shift rod can be reduced.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a partial longitudinal section of an upper half of a transmission according to an embodiment of the present invention. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. 1, and FIG.
-C section, FIG. 5 shows the same DD section, FIG. 6 shows the same EE section, FIG. 7 shows the same FF section, and FIG. 8 shows the same GG section.

In FIG. 1, reference numeral 1 denotes a transmission case;
Is a clutch housing connected to the front end side of the transmission case 1. Reference numeral 3 denotes an extension housing connected to the rear end of the transmission case 1, and 4 denotes a case cover. Reference numeral 5 denotes an input shaft.

This transmission is mounted, for example, on a so-called FR-type automobile in which the engine is mounted vertically.
The shift speed is constituted by a first gear and a reverse gear.

The input shaft 5 has an input side (front end side: left end side in FIG. 1) connected to an engine output shaft (not shown) via a clutch, and an output side (rear end side: right end side in FIG. 1). ) Is combined with the input side end (front end) of the output shaft on the same axis rearward. The output side (rear end side: right end side in FIG. 1) of the output shaft is connected to a propeller shaft (not shown) that transmits driving force to the rear wheel side. The rear end of the clutch housing 2 adjacent to the input side end (front end) of the transmission case 1 forms a shaft support wall 6 of the input side end on the front inside with respect to the connection surface with the transmission case 1. Each shaft is supported by the pivot wall 6, and the front ends of three shift rods 7, 8, and 9 arranged in parallel to each other are supported to be able to move back and forth.

The above-mentioned transmission has six pairs of transmission gears between the shafts corresponding to the respective gears, and a predetermined gear pair corresponding to the selected gear is transmitted from the input shaft 4 via the counter shaft. Or directly transmitting power to the output shaft.
The power transmission switching mechanism for switching the power transmission path includes a plurality of power transmission switching mechanisms that can selectively connect one of the front and rear idler gears rotatable relative to the shaft so as to rotate integrally with the shaft. A synchronizing device is provided, and the synchronizing device is configured to be operated by the shift lever 10 via the shift rods 7, 8, and 9.

The synchronizing device for the transmission is, for example, a 1-2 speed switching synchronizing device for switching between 1st speed and 2nd speed, and a 5th speed-R switching synchronizing device for switching between 5th speed and reverse speed (reverse). And a 3-4 speed switching synchronizer for switching between 3rd speed and 4th speed.

Each of the synchronizers connects one of the front and rear idler gears rotatable relative to the shaft so as to selectively rotate integrally therewith. The synchronizer hub fitted and fixed to the shaft. A synchronizer key provided on the outer periphery of the synchronizer hub, a pair of front and rear synchronizer rings, a gear-side ring member disposed opposite to each synchronizer ring, and a synchronizer sleeve disposed outside the synchronizer key. The synchronizer sleeve of each synchronizing device is shifted by shift forks 11, 12, 13 to shift rods 7, 8,
9 and is configured to move in the axial direction by operation of the shift lever 10 to connect and rotate one of the idler gears together.

The shift rod 7 and shift fork 11 at the position shown in the cross section (cross section CC in FIG. 1) in FIG.
The shift rod 8 and the shift fork 12, which are used to operate the speed-R switching synchronizing device, are positioned at a position shown in FIG. 5 (cross section D-D in FIG. 1). And FIG. 6 is a sectional view (FIG. 1).
The shift rod 9 and the shift fork 13 at the positions shown by (EE section) are for operating the 3-4 speed changeover synchronizing device. 4 to 6, 14, 15
And 16 show the synchronizer sleeve of each synchronizer.

Shift fork 11 for 5-speed-R switching
The shift fork 12 for 1-2 speed switching and the shift fork 13 for 3-4 speed switching are so-called reversing shift forks.

For example, the shift fork 11 for 5-speed / R switching is composed of a pair of arms 11a and 11b, is substantially U-shaped, and has a shift rod 7 for 5-speed / R switching at the upper end.
Engaging portion 18 provided with a groove for engaging pin 17 projecting from
The front ends of both arms 11a, 11b are provided with pads 19a, 19 which engage with the synchronizer sleeve 14.
b is attached. Also, this shift fork 1
The two arm portions 11a and 11b are rotatably supported by pins 21a and 21b, which are mounted at the intermediate portions on the same coaxial line, for example, through the transmission case 1. The shift fork 11 has a pair of pins 21.
The movement of the shift rod 7 is transmitted to the synchronizer sleeve 14 in the opposite direction at a predetermined lever ratio (reversal transmission) with a and 21b as the reversal fulcrum.

Similarly, the shift fork 12 for 1-2 speed switching is composed of a pair of arms 12a and 12b, is substantially U-shaped, and has a shift rod 8 for 1-2 speed switching at the upper end.
Engaging portion 23 having a groove for engaging with pin 22 protruding from
And pads 24a, 24b which engage with the synchronizer sleeve 15 at the tips of both arms 12a, 12b.
Is mounted at an intermediate portion of the two arm portions 12a and 12b on the same axis as each other, and is rotatably supported by, for example, pins 25a and 25b mounted through the transmission case 1. The shift fork 12 transmits the movement of the shift rod 8 to the synchronizer sleeve 15 in the opposite direction at a predetermined lever ratio (reversal transmission) with the pair of pins 25a and 25b as the reversal fulcrum.

Shift fork 1 for 3-4 speed switching
3 comprises a pair of arm portions 13a and 13b,
An engagement portion 27 having a groove for engaging with a pin 26 protruding from the shift rod 9 for 3-4 speed switching is provided at the upper end portion, and is provided at the tip of both arms 13a, 13b. Pads 28a and 28b which are engaged with the synchronizer sleeve 16 are mounted, and are rotated by pins 29a and 29b which are mounted through the transmission case 1 at intermediate portions of the two arm portions 13a and 13b which are coaxial with each other. It is movably supported. The shift fork 13 uses the pair of pins 29a and 29b as reversing fulcrums,
Is transmitted to the synchronizer sleeve 16 in the opposite direction at a predetermined lever ratio (reverse transmission).

The three shift rods 7, 8, 9 are arranged in the upper part of the transmission case 1 in parallel with the input shaft 4, and the front ends of the shift rods 7, 8, 9 are respectively provided at the rear ends of the clutch housing 2 as described above. , The rear end portion penetrates through the shaft support wall 30 at the rear end of the transmission case 1, and further supports the support wall 31 at the front end side of the extension housing 3 connected to the rear end side of the transmission case 1. The transmission case 1 is supported so as to be able to move back and forth by the support wall 30 at the rear end of the transmission case 1 and the support wall 31 at the front end of the extension housing 3. Then, the shift lever 10 is mounted on the upper part of the extension housing 3 via the case cover 4,
An engagement pin 10 connected to the lower end of the shift lever 10
a first engagement member (shift rod end) immediately below
The first engaging member is fixed to the rear end of the shift rod 9 for 3-4 speed switching, which is located at the center of the three shift rods 7, 8, and 9. I have. Second and third engagement members (shift rod ends) 33 and 34 are disposed adjacent to both sides of the first engagement member 32, and these are the shift rods 7 and 5 for switching the fifth speed-R. It is fixed to the shift rod 8 for 1-2 speed switching.

The shift operation is a well-known operation, and the shift direction of the shift lever 10 (the left and right direction in FIG. 8).
By the operation in the shift direction (the front-rear direction in FIG. 8), the engagement pin 10a at the lower end of the shift lever 10 is turned into the notch 32 of the first to third engagement members 32, 33, 34.
a, 33a, and 34a are selectively engaged, and one of the three shift rods 7, 8, 9 is selectively driven forward or backward, and one of the synchronizers is operated.

When the shift lever 10 is not operated, the lever 1
The first and second engagement members 33 and 34 are firstly attached to the first and second engagement members 33 and 34 by springs 33b and 34b so that the zero engagement pin 10a is held at the neutral position where the first engagement member 10a engages with the first engagement member 32.
Holding members 33c and 34c which are respectively urged toward the side of the engaging member 32 to sandwich the engaging pin 10a from both sides, and the second engaging member 33 is provided with the shift lever 10 There is provided a positioning mechanism 33d including a ball and a spring for correctly positioning at the neutral position. The holding members 33c, 34c urged by the springs 33b, 34b and the positioning mechanism 33
“d” corresponds to the select return mechanism having the configuration according to claim 5. The direction of the resilient force of the springs 33b, 34b acting on each of the holding members 33c, 34c is such that the shift rods 7, 8 to which the respective engaging members 33, 34 are fixed do not generate a rotational moment. ,
8 is set to pass through the center.

At the top of the front end of each shift rod 7, 8, 9, three grooves 7a, 7c, 7d; 8a,
8b, 8c; 9a, 9b, 9c are continuously provided, and these grooves 7a, 7 are formed in the shaft support wall 6 at the rear end of the clutch housing 2.
c, 7d; 8a, 8b, 8c; balls and springs for selectively engaging with 9a, 9b, 9c to position the shift rods 7, 8, 9 at the neutral position and the front-rear shift position, respectively. Positioning mechanisms 7e, 8e, 9e are provided. Also, a shift rod 7 for 5 speed-R switching.
A reverse detection switch 35 for detecting a reverse (R) is disposed at a position at the front end of the switch.

The transmission operates a shift fork 11 for operating a 5-speed R synchronizing device, a shift fork 12 for operating a 1-2 speed synchronizing device, and a shift fork 12 for operating a 3-4 speed synchronizing device. The shift forks 13 are all reversing shift forks, and therefore, for 5 speed-R switching, 1
Each of the shift rods 7, 8, 9 for the -2 speed switching and the 3-4 speed switching is a shift fork 11, 12, 1
3, the rotation is not regulated. So, in this example,
First to third engaging members (shift rod ends) 3 fixed to the rear ends of the shift rods 7, 8, 9 in order to regulate the rotation of the three shift rods 7, 8, 9 respectively.
2, 33, 34 adjacent side portions (the adjacent side portions of the first engagement member 32 and the second engagement member 33, the first engagement member 32 and the third engagement member 34). At the side portions adjacent to each other, the overlay portions 32e ₁ , 32
e _2; 33e; 34e to provided, adjacent cladding portion (32e ₁
And 33e, 32e ₂ and 34e), the shift rod 7,
A pair of rotation regulating surfaces 32f ₁ , 33f; 32f ₂ , 34 which are substantially perpendicular to the planes including the respective axes 8 and 9 and mutually regulate the rotation.
By forming f, three shift rods 7, 8,
9 is restricted.

FIG. 9 shows another example of the rotation restricting means for restricting the rotation of each of the three shift rods 7, 8, and 9. In this example, the shift rods 7, 8, 9 are separated from the engagement members 32, 33, 34 at the rear end.
The rotation restricting member 4 is located adjacent to the intermediate portion
1, 42, 43, and their rotation regulating members 41, 4
2 and 43 adjacent side portions (center side portions of the first member 41 and the second member 42 adjacent to each other and side portions of the first member 41 and the third member 43 adjacent to each other) The rotation restricting portions 41a ₁ , 41a ₂ ; 42a each having a pair of rotation restricting surfaces which are substantially perpendicular to the planes including the respective axes of the shift rods 7, 8, 9 and which restrict the rotation of each other.
43a is provided.

In the above example, the case where all the shift forks are inverted shift forks has been described. However, the present invention can be applied to the case where some of the shift forks are inverted shift forks. . When some of the shift forks are reversible shift forks, a rotation restricting surface is set between the shift rod that operates the synchronization device via the reversible shift fork and the shift rod adjacent thereto. The rotation restricting means is configured as described above. In this case, the adjacent shift rod may or may not operate the synchronization device via the reversing mechanism.

The present invention is not limited to the above-described transmission, but can be widely applied to manual transmissions in general.

[0035]

According to the present invention, the productivity is not deteriorated,
Further, it is possible to reduce the rotation of the shift rod without increasing the cost or deteriorating the layout, and in particular, to restrict the rotation of the shift rod that operates the synchronization device via the reversing mechanism.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view of an upper half portion of a transmission according to an example of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view taken along the line CC of FIG. 1;

FIG. 5 is a sectional view taken along line DD of FIG. 1;

FIG. 6 is a sectional view taken along the line EE of FIG. 1;

FIG. 7 is a sectional view taken along line FF of FIG. 1;

FIG. 8 is a sectional view taken along the line GG of FIG. 1;

FIG. 9 is a sectional view similar to FIG. 2, showing a rotation restricting unit according to another example of the embodiment of the present invention.

[Explanation of symbols]

7,8,9 shift rod 10 shift lever 11, 12, 13 shift forks 21a, 21b, 25a, 25b, 29a, 29b pin (inverting fulcrum) 32 the first engagement member 32f _1, 32f ₂ rotation restricting surface 33 a No. 2 engaging member 33b Spring 33c Holding member 33d Positioning mechanism 33f Rotation regulating surface 34 Third engaging member 34b Spring 34c Holding member 34f Rotation regulating surface 41, 42, 43 Rotation regulating member

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Michinori Shizuma 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Inside Mazda Engineering Co., Ltd.

Claims (5)

[Claims] 1. A transmission of a transmission in which a plurality of shift rods for operating a synchronizer are arranged in parallel with each other, and a reversing mechanism is interposed between at least one shift rod and the synchronizer operated by the shift rod. In the operating device, for a shift rod that operates a synchronization device via the reversing mechanism, between a shift rod adjacent thereto, a pair of rotation restricting surfaces that are substantially perpendicular to a plane including the axes of both shift rods are set. A shift operating device for a transmission, comprising a regulating means. 2. The speed change operation device for a transmission according to claim 1, wherein the rotation restricting means is constituted by a member different from the shift rod. 3. The speed change operation device for a transmission according to claim 1, wherein the rotation restricting means is formed integrally with an engagement member on the shift rod side for engaging the shift rod with the shift lever. 4. A shift device according to claim 1, wherein all of the shift rods operate the synchronizer via a reversing mechanism, and the rotation restricting means sets a number of rotation restriction surfaces one less than the number of the shift rods. The speed change operation device for a transmission according to claim 1. 5. A select return, wherein an engaging member provided on the shift rod side for engaging the shift rod with the shift lever holds the lever position at a neutral position in the select direction by a resilient force when the shift lever is not operated. A shift operating device for a transmission, wherein a mechanism is integrally provided, wherein the select return mechanism is set so that a direction of a resilient force passes through a center of the shift rod.