JPH11287325A - Reverse interlock device for manual transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve positioning accuracy in an interlock device of a manual transmission while arranging all the components on a shift and select shaft, and to reduce processing and assembling processes while simplifying a structure. SOLUTION: An interlock plate 70 is arranged on a shift and select shaft 22. The interlock plate 70 has a plate regulating hole for the penetration of a plate regulating tool which regulates axial movement of the shift and select shaft 22 and unrotatably supports it. The plate 70 also has a cam regulating hole with which an interlock cam 44 is engaged for regulating the movement of the interlock cam 44 caused by the operation of a shift lever.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reverse interlock device for a manual transmission, and more particularly, to a manual transmission for temporarily returning to a neutral position when shifting from fifth speed to reverse to prevent erroneous reverse operation. The present invention relates to a reverse interlock device.

[0002]

2. Description of the Related Art A vehicle is provided with a manual or automatic transmission in order to convert a driving force of an engine into a required one according to a traveling condition and to extract the required driving force. Such transmissions include a gear-type transmission and a belt-type transmission, and a gear-type transmission with a small transmission loss of driving force is frequently used.

[0003] The gear type manual transmission has a plurality of speed change gear trains. The gear train is switched by operating a shift lever to mesh the gears of each speed, so that the driving force of the engine is controlled by running conditions. It is converted as required and taken out.

In such a manual transmission, a shift-and-select shaft which is axially moved at the time of selection and rotated at the time of shift by operating a shift lever is provided. A shift and select lever selectively engaged with one of the yokes is provided, and an interlock cam whose operation is restricted when the shift lever is operated is provided. When the interlock cam is operated, the interlock cam is operated. Some devices include a reverse interlock device in which a return spring having an urging force is provided on a shift and select shaft.

That is, in the case of a manual transmission, FIGS.
Shift lever (not shown) according to each speed as shown in FIG.
Is operated in the select direction and the shift direction in a predetermined manner.

As shown in FIGS. 21 to 23, the manual transmission is provided with an interlock device 206 through a cover insertion hole 204 of the transmission case 202. This lid insertion hole 204
Is mounted on the transmission case 20 by mounting bolts (not shown).
2 is closed by a lid 208 attached to the cover 2.

The cover 208 has a cover-side shaft hole 210 formed therein. Further, a case-side shaft hole 212 is formed in the transmission case 202 so as to correspond to the lid-side shaft hole 210. A shift-and-select shaft 214 is provided in the cover-side shaft hole 210 and the case-side shaft hole 212 so as to be movable in the axial direction and rotatable.

The cover 2 of the shift and select shaft 214
The end portion on the 08 side protrudes outward from the lid 208.

A shaft connector 216 for connecting a control cable (not shown) connected to the shift lever is fixed to an end portion of the shift and select shaft 208 by a first fixing tool 218. At the end of the shift and select shaft 214, the sealing material 22 is placed between the inner peripheral surface of the lid 208 and the outer peripheral surface of the shift and select shaft 214.
0, the lid 208 and the shaft connector 21
A protective device 222 is provided between the six.

The shift and select shaft 214 has
A shift and select lever 224 that engages with each speed shift yoke (not shown) is fixed by a second fixture 226, and the shift and select lever 224 is fixed.
Interlock plate 228 having a substantially square shape so as to surround
Is provided.

The interlock plate 228 has a lever groove 230 through which the shift and select lever 224 is inserted, and a bolt slot 232 serving as a plate regulating hole.
Are formed. The distal end side of a plate bolt 236 serving as a plate restricting tool screwed into the first screw hole 234 of the transmission case 202 is inserted into the bolt long hole 232. The plate bolt 236 supports the interlock plate 228 so that it can move in the axial direction and cannot rotate. This interlock plate 228
Is a return spring holding member 23 whose side part on the transmission case 202 side is fixed to the shift and select shaft 214.
8 supported. This return spring holder 2
38 is fixed to the shift and select shaft 214 by a third fixing member 240.

Further, the shift and select shaft 214 is provided between the interlock plate 228 and the lid 208.
An interlock cam 242 is provided. The interlock cam 242 is provided by a cam holding pin 246 that penetrates a through hole 244 of the shift and select shaft 214. The interlock cam 242 is formed with a pin engagement groove 248 for loosely fitting both end portions of the cam holding pin 246.

The second threaded portion 250 of the transmission case 202 where the interlock cam 242 is located is provided with the interlock cam 242 so as to restrict the operation of the interlock cam 242 when the shift lever is operated. Cam bolt 25 serving as a cam restricting tool for abutting cam locking portion 252
4 is screwed.

A first return spring 256 is loosely fitted to the shift and select shaft 214 between the interlock cam 242 and the lid 208. The first return spring 256 contacts the inner surface of the lid 8 and allows the shift and select shaft 214 to pass therethrough.
58 and the first provided on the shift and select shaft 214.
It is supported by the other spring support 260.
A first one-side spring support 258 is provided on the inner surface of the lid 208.
A lid-side groove 262 having a predetermined depth is formed in the axial direction at the portion. Inside the lid-side groove 262, a first one-side shaft restricting tool 264 fixed to the shift and select shaft 214 is provided. Further, the first other-side spring support member 260 is supported in contact with an intermediate-side shaft restricting member 266 fixed to the shift and select shaft 214.

The shift and select shaft 214 between the interlock cam 242 and the interlock plate 228
, A second return spring 268 is loosely fitted. One end of the second return spring 268 is engaged with the interlock cam 242, and the other end is engaged with the return spring holder 238.

A third return spring 270 is loosely fitted to the shift and select shaft 214 between the interlock plate 228 and the inner surface of the transmission case 202. One end of the third return spring 270 is supported in contact with the interlock plate 228, and the other end is supported by a third spring support 272 provided on the shift and select shaft 214. This third
The spring support 272 is provided on the shift and select shaft 2.
14 and is supported in contact with the other-side shaft restricting tool 274 fixed to the base 14. The other shaft restricting tool 274 is provided in a case-side groove 276 formed on the inner surface of the transmission case 202.

Accordingly, the interlock device 206
In the case of selecting from the neutral position shown in FIGS. 21 to 23 to the fifth speed / reverse side (direction a in FIG. 19), the axial movement of the interlock cam 242 is performed as shown in FIGS. The second return spring 268 is compressed while being restricted by the side surface of the bolt 254.

At the time of shifting to the fifth speed (direction c in FIG. 19), the interlock cam 242 rotates, and the repulsive force of the second return spring 268 causes the position of the interlock cam 242 and the cam bolt 254 to move. Relationship
As shown in FIGS. 27 to 29, the cam locking portion 252 of the interlock cam 242 and the cam bolt 254 are separated.

At this time, when the gear is to be shifted directly from the fifth speed to the reverse (continuous operation in the directions d and f in FIG. 19), the movement of the interlock cam 242 in the rotational direction is caused by the lower surface of the cam bolt 254. It will be regulated and it will not be possible to shift to reverse.

However, as shown in FIG.
The operation amount AA when the operation is performed in the direction c is the clearance C between the interlock cam 242 and the cam holding pin 246.
C and the clearance BB between the interlock cam 242 and the cam bolt 254 are equal to the sum of
Since the operation in the direction d of FIG. 9 is possible, it is possible to temporarily return to the neutral position as shown in FIGS.

As described above, once returning to the neutral position, the operation shown in FIGS. 24 to 26 becomes possible.

In the operating state shown in FIGS. 24 to 26, as shown in FIGS.
Since the movement in the rotation direction is not restricted, the shift to the reverse (the direction f in FIG. 19) is possible.

Further, such an interlock device is disclosed in, for example, Japanese Patent Application Laid-Open No. 9-229190,
-42824. JP-A-9-22
No. 9190 discloses a first stopper surface for preventing the shift head from rotating in a direction opposite to the direction of engagement with the reverse shift arm, and a second stopper surface for restricting shift movement of the shift head in the fifth speed direction. Is provided on a fixed portion such as a transmission case, so that a detent mechanism for the shift shaft and a stopper mechanism for the shift shaft can be easily configured, and the five-speed transmission can be easily changed to a four-speed transmission. To change. Japanese Unexamined Utility Model Publication No. Hei 5-42824 discloses an interlock plate which is arranged with a slight gap above a plurality of jaws sequentially arranged in the select direction and which can reciprocate in the select direction. Of the plurality of jaws at any shift position of the interlock plate, so that the interlock faces at least a part of the outer jaws. It improves the ring.

[0024]

However, in the conventional reverse interlock device, the positional relationship between the interlock cam and the cam bolt is important, but the interlock cam is provided on the shift and select shaft. On the other hand, since the cam bolt is provided on the transmission case, the above positional relationship is affected by all the dimensional accuracy of the interlock cam, the shift and select shaft, the cam bolt, and the transmission case. As a result, the overall positional accuracy is reduced, the number of parts is increased, and the number of processing and assembling steps is increased.

[0025]

Therefore, in order to eliminate the above-mentioned inconvenience, the present invention provides a shift-and-select shaft which is axially moved at the time of selection and rotated at the time of shift by operating a shift lever. The shift and select shaft is provided with a shift and select lever which is engaged with each speed shift yoke, and an interlock cam whose operation is regulated when the shift lever is operated. In a reverse interlock device of a manual transmission in which a return spring having an urging force for urging the interlock cam is provided on the shift and select shaft, an interlock plate is provided on the shift and select shaft, and the interlock plate is provided on the interlock plate. Moves the shift and select shaft in the axial direction. A cam for engaging the interlock cam so as to form a plate regulating hole through which a plate regulating tool for restricting and non-rotatably supporting is inserted, and for regulating the operation of the interlock cam by operating the shift lever. A regulating hole is formed.

[0026]

According to the present invention, all the components of the interlock device can be provided on the shift and select shaft, so that the influence of the dimensional accuracy of each component is eliminated.
In addition to improving the overall position accuracy, the need for a separate cam restrictor is eliminated, and the number of parts is reduced, and the number of machining and assembly steps can be reduced.

[0027]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 to 17 show an embodiment of the present invention. In FIG. 17, reference numeral 2 denotes an engine mounted on a vehicle, 4 denotes a manual transmission connected to the engine 2, and 6 denotes a transmission case.

In the transmission case 6, the manual transmission 2 is provided.
The low-speed side, the high-speed side, and the fifth-speed / reverse-shift shafts 8-1, 8-2, and 8-3 are arranged side by side in the longitudinal direction.

Further, the manual transmission 4 is provided with a reverse interlock device 10 for temporarily returning to the neutral position when shifting from the fifth speed to the reverse to prevent an erroneous reverse operation.

In this reverse interlock device 10, as shown in FIGS. 1 and 17, a lid insertion hole 12 is formed in the side portion of the transmission case 6 from the width direction of the manual transmission 4.
A cover 14 for closing the cover insertion hole 12 is attached to the transmission case 6 with a plurality of attachment bolts 16.

The cover 14 has a cover-side shaft hole 18 formed therein. A case-side shaft hole 20 is formed in the transmission case 6 at a position corresponding to the lid-side shaft hole 18.

A shift-and-select shaft 22 is provided in the cover-side shaft hole 18 and the case-side shaft hole 20 so as to be movable in the axial direction at the time of selection and rotatable at the time of shift.

The cover 14 of the shift and select shaft 22
The side end portion is provided so as to protrude outward from the lid 14. At the end of the shift and select shaft 22,
A shaft connector 24 for connecting a control cable (not shown) connected to the shift lever is fixedly provided by a first fixture 26. Further, at the end of the shift and select shaft 22, the cover 14 and the shift and select shaft 2
A seal material 30 is provided in a seal material groove 28 formed on the inner peripheral surface of the lid 14 between the two, and a protector 32 is provided between the lid 14 and the shaft connector 24.

A shift and select lever 34 selectively engaged with one of the shift yokes (not shown) of each shift shaft 8 is fixed to the shift and select shaft 22 with a second fixing member 36. Is done. The shift and select lever 34 is formed by integrally forming a lever base 38 fixed to the shift and select shaft 22 with a second fixing member 36 and a lever engaging portion 40 that engages with each shift yoke. I have.

The shift-and-select shaft 22 is provided with an interlock cam 44 between the shift-and-select lever 34 and the lid-side contact portion 42 on the inner surface of the lid 14. The interlock cam 44 has a cam locking portion 46 and is attached to the shift and select shaft 22 by a cam holding pin 50 that penetrates a through hole 48 of the shift and select shaft 22. The interlock cam 44 is formed with a shaft insertion hole 52 through which the shift and select shaft 22 is inserted, and a pin engagement groove 54 communicating with the shaft insertion hole 52 and loosely fitting both end portions of the cam holding pin 50. I have.

The lid-side contact portion 42 of the lid 14 is formed with a lid-side groove 58 having an annular one-side shaft stopper surface 56 having a predetermined depth. In the cover side groove 58, when the shift and select shaft 22 is selected to the 5th speed / reverse side,
A one-side shaft restricting tool 60 fixed to the shift and select shaft 22 is provided so as to contact the one-side shaft stopper surface 58.

On the other hand, the case-side abutment portion 62 on the inner surface of the transmission case 6 has a ring-shaped other-side shaft stopper surface 64 having a predetermined depth.
Is formed. In this case side groove 66, the shift and select shaft 22 is
The other-side shaft restricting tool 68 fixed to the shift-and-select shaft 22 is provided so as to come into contact with the other-side shaft stopper surface 64 when the second-speed side is selected.

The shift and select shaft 22 includes
An interlock plate 70 is provided. The interlock plate 70 has a U-shaped cross section, and includes one side portion 72, another side portion 74 facing the one side portion 72, and a connecting portion 76. The one side portion 74 is directed in a direction substantially perpendicular to the shift and select shaft 22 and is brought into contact with the lid side contact portion 42 of the lid 14 to position the interlock plate 70 in the axial direction. The other side portion 74 is oriented in a direction substantially perpendicular to the shift and select shaft 22 and is in contact with the side surface of the shift and select lever 34 at the other end of the shift and select shaft 22. The connecting portion 76 is provided along the shift and select shaft 22. The connection portion 76 is a plate regulating hole for inserting a distal end of a plate bolt 80 which is a plate regulating tool screwed into a screw hole 78 of the transmission case 6 at the position of the shift and select lever 34. A long hole 82 and an L-shaped cam engagement hole 84 as a cam restricting tool are formed at the position of the interlock cam 44. The bolt elongated holes 82 cooperate with the plate bolts 80 to form the interlock plate 7.
The shift and select shaft 22 is formed to have a predetermined length in the axial direction so that 0 can be set in the axial direction and the interlock plate 70 cannot be rotated. Cam engagement hole 84
The first engagement hole 84a formed in a rectangular shape that is long in a direction orthogonal to the axial direction of the shift and select shaft 22 and the rotation direction of the shift and select shaft 22 and the first speed, third speed,
A second communication with the first engagement hole 84a in the fifth gear shift direction
An attempt is made to shift directly from the 5th speed directly to the reverse from the first cam regulating inner surface portion 86, which is formed by the engagement hole 86b and engages with the cam lock portion 46 of the interlock cam 44 when the 5th speed / reverse side is selected. In this case, the interlock cam 44 is formed by the second cam regulating inner surface portion 88 which engages the cam locking portion 46.

The shift and select shaft 22 between the interlock cam 44 and the lid 14 has a first return spring 9
0 is loosely fitted. This first return spring 90
The one end side is supported directly in contact with the one side 72 of the interlock plate 70, and the other end side is a one side spring support 92 provided on the shift and select shaft 22.
It is supported by. This one-side spring support 92 is
It is supported in contact with an intermediate shaft restricting tool 94 fixed to the shift and select shaft 22.

The shift and select shaft 22 between the interlock cam 44 and the shift and select lever 34
, A second return spring 96 is loosely fitted.
The second return spring 96 has one end directly engaged with the interlock cam 44 and the other end directly engaged with the shift and select lever 34, and biases the interlock cam 44 in the axial direction and the rotational direction. Is what you do.

Further, the shift and select shaft 22 between the shift and select lever 34 and the transmission case 6 has
The third return spring 98 is loosely fitted. One end of the third return spring 98 is directly in contact with and supported by the other end of the interlock plate 70.
The other end is supported by the other spring support 100. The other-side spring support 100 is supported in contact with another-side shaft restricting member 68 fixed to the shift and select shaft 22. When the shift and select shaft 22 is selected to the first speed or the second speed, the other shaft restricting tool 68
It comes into contact with the other shaft stopper surface 64.

Next, the operation of this embodiment will be described.

When the shift lever is in the middle position (neutral)
In the case of, as shown in FIGS.
4 is the first engagement hole 8 of the cam engagement hole 84.
It is in contact with the first cam regulating surface portion 86 within 4a.

When the shift lever is selected to the 5th speed / reverse side, the shift and select shaft 22 moves in the axial direction as shown in FIGS. Is restricted by the engagement of the cam locking portion 46 with the first cam restriction surface portion 86,
The second return spring 96 is compressed.

Next, when the shift lever is shifted to the fifth speed, the cam locking portion 46 of the interlock cam 44 is disengaged from the first cam regulating surface portion 86 as shown in FIGS. It comes into contact with the two cam regulating surface portion 88.

As a result, as shown in FIGS.
When shifting from the high speed to the reverse directly, the movement of the interlock cam 44 in the rotation direction (shift direction) is
Since the operation is regulated by the second cam regulating surface portion 88, the shift operation to the reverse operation becomes impossible. However, at this time, as shown in FIG. 13, the interlock cam 44 can return to the neutral position as in FIG. Thus, once the interlock cam 44 returns to the neutral position, the operations shown in FIGS.

Thereafter, when shifting to reverse, as shown in FIGS. 14 to 16, the cam locking portion 46 of the interlock cam 44 is returned, and shifting to reverse is performed.

As a result, since all the components of the interlock device 10 are provided on the shift and select shaft 22, the overall positional accuracy can be improved without being affected by the dimensional accuracy of each component. it can.

Further, since the conventional regulating member for the cam of the interlock cam 44 is not required separately, the number of parts is reduced, the structure is simplified, and the processing and assembling steps are reduced, and the cost is reduced. Can be.

Further, since the one side 72 of the interlock plate 70 is in contact with the lid-side abutting portion 42, the axial positioning of the interlock plate 70 can be performed with a simple configuration without providing any additional parts. And it can be easily performed.

In this embodiment, as shown in FIG. 18, the connecting portion 76 of the interlock plate 70 can be formed in a curved shape following the rotation locus of the interlock cam 44 (SG1). . Accordingly, at the time of the shift in which the interlock cam 44 rotates, the cam locking portion 46 can be firmly engaged with the second cam regulating surface portion 88 in the second engagement hole 84b.

[0052]

As is apparent from the above description, according to the present invention, the interlock plate is provided on the shift and select shaft, and the interlock plate restricts the movement of the shift and select shaft in the axial direction. And a plate regulating hole through which a plate regulating member which is supported so as not to rotate is inserted, and a cam regulating hole with which the interlock cam is engaged so as to regulate the operation of the interlock cam by operating a shift lever. By forming, all the components of the interlock device are provided on the shift-and-select shaft, so that the influence of the dimensional accuracy of each component is eliminated, the overall positional accuracy is improved, and the cam regulating member is provided. Can be eliminated separately, the number of parts can be reduced, and the number of processing and assembling steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of an interlock device in a neutral position.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a plan view of the interlock device of FIG. 1;

FIG. 4 is a cross-sectional view of the interlock device at the time of selecting the fifth speed / reverse side.

FIG. 5 is a cross-sectional view taken along line II-II of FIG.

FIG. 6 is a plan view of the interlock device of FIG.

FIG. 7 is a sectional view of the interlock device at the time of shifting to fifth speed.

FIG. 8 is a cross-sectional view taken along the line II-II of FIG.

FIG. 9 is a plan view of the interlock device of FIG. 7;

FIG. 10 is a cross-sectional view of the interlock device when directly shifting from the fifth speed to the reverse.

FIG. 11 is a cross-sectional view taken along line 〓〓-〓〓 of FIG. 10;

FIG. 12 is a plan view of the interlock device of FIG. 10;

FIG. 13 is a diagram illustrating each clearance.

FIG. 14 is a cross-sectional view of the interlock device when shifting to reverse.

FIG. 15 is a cross-sectional view taken along line 〓〓-〓〓 of FIG. 14;

FIG. 16 is a cross-sectional view of the interlock device of FIG.

FIG. 17 is a sectional view of a manual transmission.

FIG. 18 is a view showing a modification of the present invention.

FIG. 19 is a diagram illustrating an operation direction of a shift lever.

FIG. 20 is a diagram illustrating a select direction and a shift direction of a shift lever.

FIG. 21 is a cross-sectional view of an interlock device in a conventional neutral position.

FIG. 22 is a cross-sectional view taken along line II-II of FIG.

FIG. 23 is a plan view of the interlock device of FIG. 21.

FIG. 24 is a cross-sectional view of a conventional interlock device at the time of selection on the fifth speed / reverse side.

FIG. 25 is a sectional view taken along line 〓〓〓-〓〓〓 of FIG. 24;

FIG. 26 is a plan view of the interlock device of FIG. 25.

FIG. 27 is a cross-sectional view of a conventional interlock device at the time of shifting to fifth speed.

FIG. 28 is a cross-sectional view taken along the line VII-VII of FIG.

FIG. 29 is a plan view of the interlock device of FIG. 28.

FIG. 30 is a diagram illustrating each clearance.

FIG. 31 is a cross-sectional view of an interlock device when shifting from fifth speed to direct reverse in the related art.

FIG. 32 is a sectional view taken along line 〓〓〓〓-〓〓〓〓 of FIG. 31.

FIG. 33 is a plan view of the interlock device of FIG. 31.

FIG. 34 is a cross-sectional view of an interlock device at the time of shifting to reverse in the related art.

FIG. 35 is a cross-sectional view taken along the line 〓〓〓〓-〓〓〓〓 of FIG. 34.

FIG. 36 is a sectional view of the interlock device of FIG. 34.

[Explanation of symbols]

 Reference Signs List 2 engine 4 manual transmission 6 transmission case 10 interlock device 22 shift and select shaft 34 shift and select lever 44 interlock cam 70 interlock plate 82 long hole 84 cam engagement hole 86 first cam regulating surface portion 88 second Cam control surface

Claims (3)

[Claims] 1. A shift and select shaft which is axially moved at the time of selection and rotated at the time of shift by operating a shift lever, and which is engaged with each speed shift yoke. A lever is provided and an interlock cam whose operation is restricted when the shift lever is operated is provided, and a return spring having an urging force for urging the interlock cam when the interlock cam operates is used for the shift and select. In a reverse interlock device for a manual transmission provided on a shaft, an interlock plate is provided on the shift and select shaft, and the interlock plate restricts movement of the shift and select shaft in the axial direction and prevents rotation of the shift and select shaft. Plate regulation that inserts a plate regulation tool that supports as much as possible A reverse interlock for a manual transmission, wherein a cam control hole is formed in which a hole is formed and the interlock cam is engaged so as to restrict the operation of the interlock cam by operating the shift lever. apparatus. 2. The manual transmission according to claim 1, wherein the interlock cam is urged in an axial direction and a rotational direction by an urging force of the return spring with respect to the shift and select shaft. Reverse interlock device. 3. The manual transmission according to claim 1, wherein the interlock plate is positioned in an axial direction by contacting an inner surface of a cover attached to a cover insertion hole of the transmission case. Reverse interlock device.