JP2003074647A - Modification method for converting five-speed manual transmission in to six-speed manual transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To modify a five-speed manual transmission in to a six-speed manual transmission. SOLUTION: At end of an input shaft 11 provided with a fifth-speed driving gear 14 is extended, and an additional sixth-speed driving gear 9 is mounted on the end of the input shaft 11. A sixth-speed driven gear 10 is next mounted on an outer surface of a differential case 30 connected to an output shaft 15. The fifth-speed driving gear 14 and the sixth-speed driving gear 9 are switched over by a sleeve hub 25 having been used to switch the fifth-speed driving gear 14 and a reverse driving gear 5. A forward selecting shifter fork 2 and a reverse selecting shifter fork 3 of different mounting angles are mounted on a selector arm 4 rotatable according to the shift position of a shift lever. A reverse engaging shifter fork 35 is provided, to which the reverse selecting shifter fork 3 is connected when the shift lever is shifted into an R (reverse) position. Shifter rods 7 and 9 connected from the reverse engaging shifter fork 35 to a reverse driving shifter fork 6 for operating the reverse driving gear 5 are extended.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a five-speed manual transmission.
(Manual transmission) to a 6-speed manual transmission. 2. Description of the Related Art A transmission in an automobile has a complicated structure in order to change a gear ratio in addition to turning on and off power transmission (for example, see Japanese Patent Application Laid-Open No. 09-096344). In the case of a manual transmission, a gear unit consisting of five forward or six forward gears and one reverse gear is housed in a transmission case, and an operation unit attached to the transmission case is operated to drive a driving gear or a driven gear of each speed. Switch and change gears. As a result of the gear portion and the operating portion being provided between the input shaft from the engine and the output shaft to the drive wheels, the structure of a general manual transmission is complicated, and it is difficult to modify it including increasing the number of steps. For this reason, usually, an automobile having a desired number of gears or a gear ratio is selected and purchased in advance. [0003] Since the appearance, equipment, engine, and the like are used as selection criteria when selecting and purchasing a vehicle, there are many options for the appearance, equipment, engine, and the like. However, transmissions have a relatively narrow selection range, and often employ an average configuration to satisfy more desires. Therefore, many people wish to remodel after purchasing a car. Basically, a modification to replace the transmission itself can be considered, but in most cases, it is usually realized by partially replacing parts. [0004] In such a modification of the transmission by replacing parts, it is important to (a) arrange the number of additional gears when increasing the number of gears, and (b) change the arrangement of other gears and change the operating part according to the number of gears added. Become. In the remodeling, the number of steps is increased without changing the existing gears and operating parts, so that means for realizing the above (a) and (b) is important. So, as easily as possible
We studied to establish a remodeling method to realize (a) and (b). [0005] As a result of the study, as a result of 1-2 speed,
One stage is added to a 5-speed manual transmission having a shift pattern of 3-4 speed, 5-speed-R (reverse), and R (reverse), 1-2
A modification method for changing to a 6-speed manual transmission having a shift pattern of 3rd, 4th, 5th and 6th speeds. First, in the transmission case, the input shaft end provided with the 5th speed drive gear is connected to the input shaft end. A 6-speed drive gear that is extended is attached to the end of the input shaft, and a 6-speed driven gear is attached to the outer surface of a differential case that is connected to the output shaft, which is used for switching between the 5-speed drive gear and the reverse drive gear. The fifth-speed drive gear and the sixth-speed drive gear are switched by the sleeve hub, and a forward selection shifter fork and a reverse selection shifter fork having different mounting angles are attached to a selector arm that rotates according to the shift position of the shift lever outside the transmission case, When the shift lever is shifted to R (reverse), a reverse engagement shifter fork to which the reverse selection shifter fork is connected is provided, A remodeling method has been developed in which a five-speed manual transmission, in which a shifter rod extending from the reverse engagement shifter fork to operate the reverse drive shifter fork to operate the reverse drive gear, is changed to a six-speed manual transmission. Since the configuration of the five-speed manual transmission which is the basis of the modification is various and the shift pattern is also different, the application of the present invention is as follows: (1) 1-2 speed, 3-4 speed, 5 speed-R (reverse ) = Shift pattern of passenger car transmission A five-speed manual transmission having a floor shift type five-stage A-type shift pattern is provided by (2) R (reverse), 1-2 speed, 3-4 speed, 5 speed Speed-6
Shift pattern consisting of high speeds = shift pattern of a transmission for a large vehicle Limited to modification to be changed to a six-speed manual transmission having a six-stage A-type shift pattern. In the remodeling of the present invention, the six-speed driving gear is operated by using the sleeve hub used for switching between the fourth-speed driving gear and the reverse driving gear of the five-speed manual transmission which is the basis of the remodeling. The 6th speed drive gear is mounted on the extended input shaft end. The corresponding six-speed driven gear is attached to the outer surface of a differential case (center differential case) located at the end of the output shaft because there is no room for attachment to the output shaft. At this time, the driving gears or driven gears of the fifth speed or lower may be appropriately replaced from the relationship of the gear ratio. When simply adding the sixth-speed drive gear and the driven gear, the overdrive is added. In addition to adding the sixth-speed drive gear and the driven gear, when exchanging each drive gear or the driven gear of the fifth or lower speed, the gear ratio is changed. The review will improve the continuity of acceleration and fuel efficiency. [0008] The operation of the sixth-speed drive gear is most conveniently performed by using a sleeve hub that switches between the fifth-speed drive gear and the reverse drive gear in the five-speed manual transmission that is the basis of the modification. However, this eliminates the operation section of the reverse drive gear, so that the present invention uses a shift pattern of 1-2.
From the shift pattern for passenger cars consisting of 3rd, 3rd, 4th and 5th-R (reverse), R (reverse), 1st-2nd, 3rd-4th and 5th-6th
Change to a shift pattern for large vehicles consisting of high speeds,
The operation unit for the reverse drive gear is separately provided outside the transmission case. Specifically, a separate reversing selection shifter fork is added to the selector arm that rotates with the shift lever,
Using this shifter fork, a backward drive shifter fork is operated via a backward engagement shifter fork and a shifter rod. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a left side sectional view of a modified six-speed manual transmission to which the present invention is applied, and FIG. 2 is a partial left side view showing connection between a joint rod 1 extending from a shift lever and a modified operation unit. 3 is a partially enlarged view showing a switching relationship of the forward selection shifter fork 2, FIG. 4 is a partially enlarged view showing a switching relationship of the backward selection shifter fork 3, and FIG. 5 is a joint rod 1 extending from the shift lever.
FIG. 6 is a cross-sectional view of the connecting portion between the motor and the selector arm 4 in neutral, FIG. 6 is a cross-sectional view of the connecting portion when the connecting portion is retracted, and FIG. 8 is a cross-sectional view showing the connection relationship between the reversing drive shifter fork 6 for switching the reversing drive gear 5 and the shifter rods 7, 8. As shown in FIG. The modification according to the present invention is basically applied to existing parts by adding a sixth-speed driving gear 9 and a sixth-speed driven gear 10, as shown in FIG. . In this case, the sixth speed is treated as a so-called overdrive. However, actually, to achieve smooth acceleration,
It is desirable that the gear ratio be adjusted by appropriately replacing each speed drive gear or driven gear. In this case, the sixth-speed drive gear 9 is added after the third-speed drive gear 12, the fourth-speed drive gear 13, and the fifth-speed drive gear 14 are replaced with the input shaft 11 that is replaced to extend the end. 3rd speed driven gear 1 provided on output shaft 15
The sixth and fourth speed driven gears 17 and the fifth speed driven gear 18 are not replaced.
In order to prevent the 6th speed drive gear 9 from deviating, a fastening collar 19 may be attached to the end of the input shaft 11. For the output shaft 15, the first-speed driven gear 22 and the second-speed driven gear 23 are exchanged. First speed drive gear 20 and second speed drive gear 21 provided on input shaft 11
Do not exchange. Existing sleeve hubs 24, 25.26 and synchronizers 27, 28 can be used, but a synchronizer 29 for a 6-speed drive gear is added. The sixth-speed driven gear 10 is fixed to the outer surface of the differential case 30. In the present invention, as shown in FIG.
(Reverse) Uses a shift pattern 31 for a large vehicle consisting of 1-2 speed, 3-4 speed, and 5-6 speed. In this example, there is an R (reverse) in front of FIG. 2 and a 5-6 speed in the back,
The movement of the shift lever from left to right (from the front to the back in FIG. 2) results in the swing of the joint rod 1 from the back to the front. The swing of the joint rod 1 causes the selector arm 4 to rotate and rotate, and in the range of 1-6 speeds, the forward selection shifter fork 2 engages with one of the forward engagement shifter forks 32, 33, 34 to change the speed. (FIG. 3). Then, when the shift lever is shifted to the R position, the reverse selection shifter fork 3 is engaged with the reverse engagement shifter fork 35 for the first time, and the reverse drive gear 5 (see FIG. 1) can be operated (FIG. 4). When the shift lever is in the neutral position, the check ball 36 and the check fitting hole at the connection portion between the joint rod 1 and the selector arm 4 are set.
37 is fitted to make it in a stable state (FIG. 5), and the gear fitting gives a sense of moderation as a light resistance when shifting (FIG. 6). Since the operating portion of the existing reverse drive gear 5 is used for shifting to the sixth speed, as shown in FIG.
An operation part for shifting to the transmission case 38 is provided on the outer surface of the transmission case 38. More specifically, when the shift lever is moved to the left end of the shift pattern to enter R, the retreat selection shifter fork 3 provided at one end of the selector arm 4 engages with the retreat engagement shifter fork 35, and then moves toward R. When the shift lever is operated to move forward (reverse operation is also possible), the movement of the reverse engagement shifter fork 35 transmits the shifter rods 7 and 8 to move the reverse drive shifter fork 6 and the shifter complete 42
The reverse drive gear 5 is operated by the swing of (FIG. 8). The present invention is a remodeling method. For example, since the existing shift lever and the reverse drive gear 5 are used, the reverse select shifter fork 3 and the reverse drive shifter fork 6 are not necessarily arranged in a straight line. For this reason, in this example, the shifter rods 7 and 8 are divided and connected by the connecting rod 40, and the shifter rod 8 is supported by the support stay 39 attached to the outer surface of the transmission case 38. Further, the shifter rod 8 is urged by the coil spring 41 in the return direction. Although the present invention is not applicable to all types of vehicles, the number of gears can be increased relatively easily for applicable types of vehicles. This is the challenge
This is an effect of solving (a) the arrangement of the number of additional steps, and (b) changing the arrangement of other gears and changing the operation unit according to the number of added steps.
Also, since many of the existing parts are diverted, the remodeling cost can be reduced. Thus, the present invention can provide a practical retrofitting method for changing a 5-speed manual transmission to a 6-speed manual transmission.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a left side sectional view of a modified six-speed manual transmission to which the present invention is applied. FIG. 2 is a partial left side view showing a connection between a joint rod extending from a shift lever and an operation unit after modification. FIG. 3 is a partially enlarged view showing a switching relationship of a forward selection shifter fork. FIG. 4 is a partially enlarged view showing a switching relationship of a backward selection shifter fork. FIG. 5 is a cross-sectional view of a connection portion between a joint rod extending from a shift lever and a selector arm in a neutral state. FIG. 6 is a cross-sectional view when the connecting portion is retracted. FIG. 7 shows only the operation unit of the reverse drive gear, which is extracted and represented by 6;
It is a left view of a speed manual transmission. FIG. 8 is a cross-sectional view showing a connection relationship between a reverse drive shifter fork for switching a reverse drive gear and a shifter rod. [Description of Signs] 1 Joint rod 2 Forward select shifter fork 3 Reverse select shifter fork 4 Selector arm 5 Reverse drive gear 6 Reverse drive shifter fork 7 Shifter rod 8 Shifter rod 9 6 speed drive gear 10 6 speed driven gear 11 Input shaft 15 Output shaft 25 5-6 Speed Sleeve Hub 30 Differential Case

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Claims (1)

Claims: 1. A 5-speed manual transmission having a shift pattern of 1-2 speed, 3-4 speed, and 5 speed-R (reverse) is added with one step, and R (reverse), A modification method for changing to a 6-speed manual transmission having a shift pattern of 1-2 speed, 3-4 speed, and 5-6 speed, wherein an input shaft provided with a 5-speed drive gear in a transmission case. At the end of the input shaft, an additional 6-speed drive gear is attached, and then a 6-speed driven gear is attached to the outer surface of the differential case connected to the output shaft, for switching between the 5-speed drive gear and the reverse drive gear. A fifth-speed drive gear and a sixth-speed drive gear are switched by the sleeve hub used, and a forward-selection shifter fork and a reverse-selection gear having different mounting angles are attached to a selector arm that rotates according to the shift position of the shift lever outside the transmission case. The mounting Tafoku, the shift lever R (recession)
A five-speed manual transmission, wherein a reverse engagement shifter fork to which the reverse selection shifter fork is connected when shifting is provided, and a shifter rod connected to the reverse drive shifter fork for operating a reverse drive gear from the reverse engagement shifter fork is provided. A modification method to change to a 6-speed manual transmission.