JP3173282B2 - Shift pattern change mechanism - Google Patents

Abstract

PURPOSE:To change a shift pattern by only additionally providing a reverse shift yoke, reverse shaft and a link mechanism CONSTITUTION:In this constitution, a reverse shaft 60 is arranged in almost parallel relating to a 1st/2nd speed shift shaft 48 in a one end side location of a shift and select shaft 12 from the 1st/2nd speed shift shaft 48 of a transmission, also to provide a reverse shift yoke 62 in the reverse shaft 60 and to provide a link mechanism connecting the reverse shaft 60 to a 5th-speed/reverse shift shaft 52, and a shift pattern to the reverse by a shift lever is changed to a reverse direction in a select direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift pattern changing mechanism, and more particularly to a shift pattern changing mechanism capable of changing a shift pattern without changing the entire layout of a transmission mechanism of a transmission.

[0002]

2. Description of the Related Art A vehicle is provided with a manual or automatic transmission in order to convert the power of an internal combustion engine as required according to running conditions and to extract the power. Such transmissions include a gear-type transmission and a belt-type transmission, and a gear-type transmission with small power transmission loss is frequently used.

[0003] The gear type manual transmission has a plurality of speed change gear trains, and the power train of the internal combustion engine is changed in accordance with the running conditions by switching the gear trains with a shift lever to mesh the gears of each stage. And convert it to the required one.

As the shift pattern changing mechanism, there is one disclosed in Japanese Patent Application Laid-Open No. 5-280640.
In the shift mechanism of the transmission disclosed in this publication, a shift and select lever is provided with a first- to fifth-speed lever portion and a reverse lever portion.
A reverse shift arm in which the reverse lever is engaged by a select operation to the reverse position opposite to the speed position is provided, and the fifth speed / reverse shift shaft is moved in the axial direction via the reverse shift arm. The reverse gear train is switched to the meshing state to prevent a misshift between the fifth speed position and the reverse position.

There is one disclosed in Japanese Utility Model Publication No. 2-2119. The shift device for a gear transmission disclosed in this publication can be used without changing the basic mechanism of a general-purpose gear transmission.
Further, it is possible to provide a transmission gear mechanism at a higher speed step, which is small, has a regular shift pattern, is easy to operate, and has a simple structure.

[0006] There is one disclosed in Japanese Utility Model Publication No. 4-3863. The shift mechanism of the vehicular power distribution device disclosed in this publication is characterized in that the shift mechanism moves the first shift rod from a high-speed position to a low-speed position and the second shift rod from a four-wheel position to a two-wheel position. Is the same as
And one end of the swing arm and the first end from the swing center of the swing arm.
The length from the swing center of the swing arm to the engagement position with the second recess is shorter than the length from the swing center of the swing arm to the engagement position with the second recess. The operation amount of the transfer lever required to move the two-shift rod from the four-wheel position to the two-wheel position is made smaller than the operation amount of the transfer lever required to move the first shift rod from the high-speed position to the low-speed position. And improved operability.

[0007]

By the way, in the conventional transmission, as shown in FIG. 8, there is a first speed position at the upper left, a second speed position at the lower left, a third speed position at the upper middle, and a lower middle position. The shift pattern has a fourth speed position, a fifth speed position at the upper right, and a reverse (R) position at the lower right. This shift pattern is Japanese style.

[0008] Here, as shown in FIG.
When changing the position from the lower right to the European shift pattern located on the left side of the upper left position from the first speed position, it is necessary to change the entire layout of the transmission mechanism of the transmission, which is disadvantageous in practical use. In addition, it is necessary to manufacture a transmission corresponding to each shift pattern, which is disadvantageous in that it is difficult to manufacture, increases the cost, and is economically disadvantageous.

For reference, a conventional transmission using a Japanese shift pattern will be described. A driving force from an internal combustion engine (not shown) is supplied to a clutch (not shown) in a transmission case (not shown). Main shaft 104, which is an input shaft intermittently connected by
And a reverse idler shaft 108 are disposed in a longitudinal direction and substantially parallel to a transmission (not shown) which is a selective sliding type manual transmission.

The main shaft 104 includes a first main shaft bearing (not shown) held on a light wall (not shown) of a light case (not shown) of the transmission case, and a transmission case case (not shown). It is rotatably supported by a second main shaft bearing (not shown) held on a left wall (not shown) of a left case (not shown).

The countershaft 106 includes a first countershaft bearing (not shown) held on the right wall of the right case and a second countershaft bearing held on the left wall of the left case. (Not shown)
And are rotatably supported by.

Further, a reverse idler shaft 108
Is rotatably supported by the right wall portion and the left wall portion.

As shown in FIG. 10, the shift operation section 102 is provided with a shift and select shaft 112 held by a shaft support section 110 of a transmission case. The shift and select shaft 112 is moved in the axial direction at the time of selection and is rotated around the axis at the time of shift via a control shaft (not shown) according to the operation state of a shift lever (not shown). Things.

This shift and select shaft 112
Is provided with an interlock plate 114 for preventing malfunction.

This interlock plate 114 is provided in FIG.
As shown in FIG. 1 and FIG. 12, the first side portion 116 is formed in a C shape, and the second side portion 11 facing the first side portion 116 is formed.
8, a back 120 connecting one end of each of the first side 116 and the second side 118, a first guide 122 bent at the other end of the first side 116, and a second The second guide portion 124 is bent at the other end of the side portion 118.

A lever groove 126 is formed between the first guide portion 122 and the second guide portion 124.
The first and second guides on the first and second guide portions 122 and 124 side.
First and second recessed end surfaces 128 and 130 are formed on the side portions 116 and 118 to reduce the width. Further, a first shaft hole 132 and a second shaft hole 134 through which the shift and select shaft 112 is inserted are formed in the first side portion 116 and the second side portion 118, and a long hole shape is formed in the back portion 120. A bolt insertion hole 136 is formed.

In the interlock plate 114, the shift and select shaft 112 is inserted into the first and second shaft holes 132 and 134, and the distal end side of the plate holding bolt 138 attached to the transmission case has a long hole-shaped bolt insertion hole. 136 is supported by being inserted.

The shift and select shaft 112
Is provided with one end of a shift-and-select lever 140 in an interlock plate 114, and the other end of the shift-and-select lever 140 is provided with a first-speed / second-speed shift yoke 142, a third-speed / fourth-speed shift yoke 144, It selectively engages with the fifth speed / reverse shift yoke 146.

The first-speed / second-speed shift yoke 142 is a first-speed / second-speed shift yoke.
While being provided on the second speed shift shaft 148,
The third / fourth yoke 144 is provided on the third / fourth shift shaft 150, and the fifth / reverse yoke 146 is provided with a five
The speed / reverse shift shaft 152 is provided.

The first-speed / second-speed shift shaft 148 is provided with a first-speed / second-speed fork 154 that engages with the first-speed / second-speed sleeve. Is provided with a third-speed / fourth-speed fork 156 that engages with the third-speed / fourth-speed sleeve, and a fifth-speed / reverse shift shaft 152 is provided with a fifth-speed fork 158 that engages with the fifth-speed sleeve. I have.

Further, a first speed / second speed shift shaft 148, a third speed / fourth speed shift shaft 150, and a fifth speed / reverse shift shaft 152 are substantially parallel to the main shaft 4 and one end of the shift and select shaft 112. 11, that is, from the right side in FIG. 11 to the other end side, that is, from the left side in FIG. 11.

As the shift-and-select lever 112, as shown in FIG. 13, a shift-and-select lever 112 having a groove 166 conforming to a Japanese shift pattern is used.

[0023]

SUMMARY OF THE INVENTION To solve the above-mentioned problems, the present invention provides a transmission case in which a main shaft, a counter shaft and a reverse idler shaft are disposed substantially in parallel, and a shift lever is operated. A shift-and-select shaft that is rotated during shift and is moved in the axial direction during select, an interlock plate for preventing malfunction is provided on the shift-and-select shaft, and a first-speed / second-speed shift yoke is provided.
A 3-speed / 4-speed shift shaft provided with a 3-speed / 4-speed shift yoke,
A fifth speed / reverse shift shaft provided with a fifth speed / reverse shift yoke is provided, and a first speed / second speed shift shaft, a third speed / fourth speed shift shaft,
In a transmission in which a first-speed / reverse shift shaft is arranged substantially in parallel and sequentially from one end of the shift-and-select shaft to the other end, one end of the shift-and-select shaft is shifted more than the first-speed / second-speed shift shaft. A reverse shaft is disposed substantially parallel to the first-speed / second-speed shift shaft at a side portion, and a reverse shift yoke is provided on the reverse shaft to link the reverse shaft with the fifth-speed / reverse shift shaft. And the shift pattern to reverse by the shift lever is changed in the reverse direction in the select direction.

[0024]

According to the invention described above, when the shift lever selects the reverse position changed in the reverse direction in the select direction, the operation of the reverse shaft is communicated to the fifth speed / reverse shift shaft via the link mechanism. , And the shift pattern is changed.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

1 to 6 show an embodiment of the present invention. In FIGS. 1 and 2, reference numeral 2 denotes a shift operation unit of a selective sliding type manual transmission (hereinafter simply referred to as "transmission") not shown.

In a transmission case (not shown), a main shaft 4, which is an input shaft to which a driving force from an internal combustion engine (not shown) is interrupted by a clutch (not shown), a counter shaft 6, and a reverse idler. The shaft 8 and the shaft 8 are disposed in the longitudinal direction of the transmission and substantially in parallel.

The main shaft 4 includes a first main shaft bearing (not shown) held on a light wall (not shown) of a light case (not shown) of the transmission case and a left case of the transmission case. It is rotatably supported by a second main shaft bearing (not shown) held on a left wall (not shown) of a case (not shown).

The countershaft 6 has a first countershaft bearing (not shown) held on the right wall of the right case and a second countershaft bearing (not shown) held on the left wall of the left case. (Not shown).

Further, the reverse idler shaft 8 is rotatably supported by the right wall and the left wall.

On the main shaft 4, a first speed main gear (not shown), a reverse main gear (not shown), and a second speed main gear (not shown) are fixedly provided in order from the internal combustion engine side. And a third-speed main gear (not shown), a fourth-speed main gear (not shown), and a fifth-speed main gear (not shown) provided rotatably in a side case (not shown) of the transmission case. I have.

A final drive gear (not shown) constituting a final reduction mechanism is fixed to the counter shaft 6 sequentially from the internal combustion engine side, and a first speed counter gear (not shown) meshed with a first speed main gear. ) And a second-speed counter gear (not shown) meshing with a second-speed main gear are rotatably provided, and a third-speed counter gear (not shown) meshing with a third-speed main gear meshes with a fourth-speed main gear. Speed counter gear (not shown) and 5 in the side case
5th-speed counter gear with which the 1st-speed main gear meshes (not shown)
Are fixedly provided.

The reverse idler shaft 8
Is provided with a reverse sleeve (not shown) and a reverse idler gear (not shown) that can mesh with the reverse main gear.

The final drive gear meshes with a final driven gear (not shown) provided in a differential section (not shown).

In the counter shaft 6 between the first-speed counter gear and the second-speed counter gear, a first-speed / second-speed sleeve (not shown) is provided on the first-speed counter gear side, and a second-speed counter gear side is provided. A sleeve gear (not shown) is provided integrally with the first-speed / second-speed sleeve. This sleeve gear can mesh with the reverse idler gear.

A first speed synchronization mechanism (not shown) is provided on the counter shaft 6 between the first speed / second speed sleeve and the first speed counter gear.
Is provided. The counter shaft 6 between the sleeve gear and the second-speed counter gear is provided with a second-speed synchronization mechanism (not shown).

The main shaft 4 between the third speed main gear (not shown) and the fourth speed main gear (not shown) has a third speed / 4
A speed sleeve (not shown) is provided.

A third speed synchronizing mechanism (not shown) is provided on the main shaft 4 between the third speed / fourth speed sleeve (not shown) and the third speed main gear. The main shaft 4 between the third-speed / fourth-speed sleeve and the fourth-speed main gear is provided with a fourth-speed synchronization mechanism (not shown).

The main shaft 4 is provided with a fifth speed sleeve (not shown) in the vicinity of a fifth speed main gear (not shown). The main shaft 4 between the fifth speed sleeve and the fifth speed main gear is provided with a fifth speed synchronization mechanism (not shown).

As shown in FIG. 1, the shift operation section 2 is provided with a shift and select shaft 12 held by a shaft support section 10 of a transmission case.
The shift and select shaft 12 is moved in an axial direction at the time of selection and is rotated around an axis at the time of shift via a control shaft (not shown) according to an operation state of a shift lever (not shown). Things.

The shift and select shaft 12 is provided with an interlock plate 14 for preventing malfunction.

The interlock plate 14 is formed in a C-shape as shown in FIGS.
A second side portion 18 facing the first side portion 16, a back portion 20 connecting one end side of each of the first side portion 16 and the second side portion 18, and the other end of the first side portion 16 The first guide portion 22 is bent at the side, and the second guide portion 24 is bent at the other end of the second side portion 18. The ends of the first and second guide portions 22 and 24, which are the open ends of the interlock plate 14, are again bent outwardly and in a U-shaped cross section, as shown in FIG.

A lever groove 26 is formed between the first guide portion 22 and the second guide portion 24. First and second recessed end surfaces 28 and 30 are formed on the first and second side portions 16 and 18 on the side of the first and second guide portions 22 and 24 to reduce the width. Further, the first side portion 16 and the second side portion 18 have first shaft holes 3 through which the shift and select shaft 12 is inserted.
2 and a second shaft hole 34 are formed. Also, the back 20
A long hole-shaped bolt insertion hole 36 is formed in the hole.

The interlock plate 14 has a first
The shift and select shaft 1 is inserted into the second shaft holes 32 and 34.
2 is inserted, and the distal end side of the plate holding bolt 38 attached to the transmission case is inserted into the elongated bolt insertion hole 36 to be supported.

On one side of the interlock plate 14, that is, on the left side of FIG.
2 is provided with a first spring support member separated from the interlock plate 14. One end of a first return spring, which is a positioning spring loosely fitted to the shift and select shaft 12, is locked to the first spring support.

A second spring support is provided on the other side of the interlock plate 14, that is, on the right side of FIG. One end of a second return spring loosely fitted to the shift and select shaft 12 is locked to the second spring support.

The shift and select shaft 12 is provided with one end of a shift and select lever 40 in the interlock plate 14. The other end of the shift and select lever 40 is selectively engaged with a first-speed / second-speed shift yoke 42, a third-speed / fourth-speed shift yoke 44, and a fifth-speed / reverse shift yoke 46.

The first-speed / second-speed shift yoke 42 is a first-speed / second-speed shift yoke.
The speed shift shaft 48 is provided. The third / fourth speed yoke 44 is provided on the third / fourth speed shift shaft 50. The fifth speed / reverse yoke 46 is provided on the fifth speed / reverse shift shaft 52.

The first-speed / second-speed shift shaft 48 has a first-speed / second-speed fork 54 engaged with the first-speed / second-speed sleeve.
Is provided. The third-speed / fourth-speed shift shaft 50 is provided with a third-speed / fourth-speed fork 56 engaged with the third-speed / fourth-speed sleeve. The fifth speed / reverse shift shaft 52 is provided with a fifth speed fork 58 that engages with the fifth speed sleeve.

A first-speed / second-speed shift shaft 48, a third-speed / fourth-speed shift shaft 50, and a fifth-speed / reverse shift shaft 52 are substantially parallel to the main shaft 4 and one end of the shift-and-select shaft 12. 2, that is, from the right side in FIG. 2 to the other end side, that is, from the left side in FIG. 2.

The first-speed / second-speed shift shaft 4
8, a reverse shaft 60 is disposed at a position on one end side of the shift and select shaft 12 substantially in parallel with the first-speed / second-speed shift shaft 48, and a reverse shift yoke 62 is provided on the reverse shaft 60;
A link mechanism 64 for connecting the reverse shaft 60 and the fifth speed / reverse shift shaft 52 is provided to change the reverse shift pattern by a shift lever (not shown) in the select direction in the reverse direction.

More specifically, as shown in FIG. 1, the link mechanism 64 is provided so as to be swingable about a point G. The reverse shift shaft 52 is lowered to enter a reverse state.

As shown in FIG. 6, a shift and select lever 12 having a groove 66 corresponding to the shift pattern is used.

Next, the operation will be described.

When the shift lever (not shown) is shifted and selected to the reverse position, the interlock plate 14 is moved to the reverse shaft 60 side as shown in FIG. 3, and the shift and select lever 40 communicates with the reverse shift yoke 62.

Then, the reverse shaft 60 is lifted about the point G, and the fifth speed
When the reverse shift shaft 52 is lowered, the reverse shift shaft 52 is in contact with the reverse idler shaft 8 to enter a reverse state.

Also, a shift lever (not shown)
When shifting and selecting from the high speed to the fifth speed position, the operation is the same as the conventional one. (FIG. 5 discloses a select state to the fifth speed position.)

Thus, the shift pattern can be changed only by adding the reverse shift yoke 62, the reverse shaft 60, and the link mechanism 64, and there is no fear that the configuration is unnecessarily complicated, and the manufacture is easy. Yes, the cost can be kept low and it is economically advantageous.

The reverse shaft 60 and the fifth speed / reverse shift shaft 52 are connected by the link mechanism 64, so that the vertical movement of the reverse shaft 60 is caused by the swinging operation of the link mechanism 64. 52 can be reliably transmitted to the reverse state, and the operation reliability is improved, which is practically advantageous.

Further, since the open end of the interlock plate 14 is bent into a U-shaped cross section at the outer portion, the shape of the interlock plate 14 is not complicated, the molding is easy, and the cost is reduced. It can contribute to reduction.

Furthermore, if the shift and select lever 12 that matches the shift pattern is used, the shift pattern can be easily changed without changing the transmission mechanism of the transmission.

It should be noted that the present invention is not limited to the above-described embodiment, and various application modifications are possible.

For example, in the embodiment of the present invention, the interlock plate 14 is formed in a C shape, and
A side portion 16 and a second side portion 18 facing the first side portion 16
A back portion 20 connecting one end of each of the first side portion 16 and the second side portion 18, a first guide portion 22 bent at the other end of the first side portion 16, and a second side portion. A second guide portion 24 bent at the other end of the portion 18, and end portions of the first and second guide portions 22 and 24 are again bent outwardly and in a U-shaped cross section, respectively. However, as shown in FIG. 7, the width of the open side of the interlock plate 70, that is, the first side portion 72 and the second side portion 74 facing the first side portion 72 on the lever groove 76 side are changed. And the first guide part 7
8 and the second guide portion 80 may be shaped so that their respective ends face each other. Then, the interlock plate 7
The shape of 0 can be deformed, and the shape can be changed according to the arrangement space, which is practically advantageous.

[0064]

As described above in detail, according to the present invention, the first and second speed shift shafts of the transmission are arranged at one end side of the shift and select shaft substantially parallel to the first and second speed shift shafts. And a reverse shift yoke on the reverse shaft, a link mechanism connecting the reverse shaft and the fifth speed / reverse shift shaft, and the shift pattern to the reverse by the shift lever in the reverse direction in the select direction. Since only the reverse shift yoke, reverse shaft, and link mechanism are added,
The shift pattern can be changed, the configuration is not likely to be complicated, the production is easy, the cost can be kept low, and it is economically advantageous. In addition, by connecting the reverse shaft and the fifth speed / reverse shift shaft by the link mechanism, the movement of the reverse shaft can be transmitted to the fifth speed / reverse shift shaft by this link mechanism, and the reverse state can be reliably established. Therefore, the operation reliability is improved, which is practically advantageous. Furthermore,
By using a shift and select lever that matches the shift pattern, you can change the transmission mechanism without changing
The shift pattern can be easily changed, and the usability can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a speed change operation portion showing an embodiment of the present invention.

FIG. 2 is a schematic front view of a shift operation unit.

FIG. 3 is a schematic front view of a shift operation unit when a shift lever is in a reverse state.

FIG. 4 is a schematic front view of a shift operation unit when a shift lever is set to a fifth speed state.

FIG. 5 is a perspective view of an interlock plate.

FIG. 6 is a perspective view of a shift and select lever.

FIG. 7 is a plan view of an interlock plate showing another embodiment of the present invention.

FIG. 8 is a schematic diagram of a Japanese shift pattern showing the prior art of the present invention.

FIG. 9 is a schematic diagram of a European shift pattern.

FIG. 10 is a schematic plan view of a shift operation unit.

FIG. 11 is a schematic front view of a shift operation unit.

FIG. 12 is a perspective view of an interlock plate.

FIG. 13 is a perspective view of a shift and select lever.

[Explanation of symbols]

 2 speed change operation part 4 main shaft 6 counter shaft 8 reverse idler shaft 10 shaft support part 12 shift and select shaft 14 interlock plate 26 lever groove 32 first shaft hole 34 second shaft hole 36 bolt insertion hole 38 plate holding bolt 40 Shift and select lever 42 1st / 2nd shift yoke 44 3rd / 4th shift yoke 46 5th / reverse shift yoke 48 1st / 2nd shift shaft 50 3rd / 4th shift shaft 52 5th speed / reverse shift shaft 54 1st speed / 2nd speed fork 56 3rd speed / 4th speed fork 58 5th speed fork 60 Reverse shaft 62 Reverse shift yoke 64 Link mechanism 66 Groove

Claims (1)

(57) [Claims] 1. A shift case in which a main shaft, a counter shaft, and a reverse idler shaft are disposed substantially in parallel in a transmission case, and the shift shaft is rotated by a shift lever operation during a shift operation and is moved in an axial direction during a select operation. A select shaft is provided, an interlock plate for preventing malfunction is provided on the shift-and-select shaft, a first-speed / second-speed shift shaft having a first-speed / second-speed shift yoke is provided, and a third-speed / four-speed shift yoke is provided. A third-speed / fourth-speed shift shaft, a fifth-speed / reverse-shift shaft provided with a fifth-speed / reverse-shift yoke, and a first-speed / second-speed shift shaft and a third-speed / four-speed shift shaft with respect to the main shaft. And the fifth speed / reverse shift shaft are substantially parallel to one end of the shift and select shaft. And a transmission shaft sequentially arranged from the first gear to the other gear, a reverse shaft substantially parallel to the first-gear and second-gear shift shafts at one end of the shift-and-select shaft with respect to the first-gear and second-gear shift shafts. And a reverse shift yoke is provided on the reverse shaft, a link mechanism for connecting the reverse shaft with the fifth speed / reverse shift shaft is provided, and a shift pattern to reverse by the shift lever is reversed in a select direction. A shift pattern changing mechanism, characterized in that the shift pattern changing mechanism is changed.