JPH02146371A - Speed shift operator for transmission - Google Patents

Abstract

PURPOSE:To improve the quality of a speed shift operation, by making a constitution so that a lock pin may be put into/out of guide grooves at a shifter rod in linkage with a clutch operation, and forming a chamber at the tip portion of the lock pin and inclination surfaces at guide grooves. CONSTITUTION:When a clutch pedal 14 is stepped on and a clutch 6 is cut off, a lock pin 16 is lifted up from a guide groove 51 at a shifter rod 41 through a link mechanism 18, an arm 17, and the turning and movement of the shifter rod 41 become free. After a shifter arm 42 has been engaged with a predetermined shifter rail by means of a shift lever 40, the shifter rod 41 is made to move and then, shifting to a predetermined speed shift step is made. After the completion of a shift operation, the lock pin 16 is pushed down by the release of the stepping on of the clutch pedal 14, and insertion into a guide groove 52 or 53 is made. Accordingly, a premature shift operation before the cutting off of the clutch 6 does not occur. The operational force of the shift lever 40 is lightened due to a chamfer at the tip of the lock pin and the inclination surfaces 52a, 53a of grooves 52, 53.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shift operation device for a transmission, and more specifically, in a manual transmission for a vehicle, it is possible to reduce the shift operation force of each gear, and to prevent erroneous operation and gear shift operation. Regarding something that prevents it from coming off.

[Conventional technology]

Generally, a shift operating device for a manual transmission having multiple gears is provided with a plurality of parallel shift rails extending to the speed change gear device side, and an interlock mechanism is provided between each of the shift rails. In addition to preventing unselected shift rails from moving together, each shift rail is provided with a positioning mechanism in the shift direction to prevent erroneous operation.It also ensures that forward and reverse gears are on the same shift operation line. The misshift prevention mechanism of the transmission installed in the 1980-6
This is disclosed in Japanese Patent Publication No. 7549, and it is also disclosed in U.S. Pat.
It is shown in the publication No.

[Problem to be solved by the invention]

By the way, in the former prior art mentioned above, although it is possible to prevent misshifts between forward gear and reverse gear, it is possible to prevent erroneous operation due to premature shift operation before the clutch is completely disengaged, and erroneous clutch operation during gear change operation. If this continues, problems may occur such as damage to the clutch, damage to the synchronizer mechanism, and gear noise during reverse shifting.

In addition, the fork shaft in the latter prior art (
In this positioning mechanism, a check ball pressed by a spring fits into a check groove formed on the shift rail to prevent the shifter rail from shifting. Since it is necessary to be able to shift smoothly, it is not possible to hold the gear firmly fixed, and for this reason, it cannot be expected to be very effective in preventing gear slippage.

The present invention has been proposed to address the above-mentioned problems, and includes a lock pin that is inserted into and removed from a guide groove formed in a shifter rod from a shift lever in conjunction with clutch operation during a gear shift operation of a manual transmission. This configuration prevents erroneous clutch and shift operations such as premature shift operation before the clutch is completely disengaged, and
The object of the present invention is to provide a shift operation device for a transmission that improves shift operability by reducing shift operation force, preventing gear slippage, and gear noise during reverse shifting.

[Means to solve the problem]

To achieve the above object, the present invention provides a manual transmission in which a sleeve of a synchronizing mechanism is shifted to a predetermined gear for shifting via a corresponding shifter rail by moving a shifter rod from a shift lever in the axial direction. In the shift operation device, the shifter rod has three guide grooves perpendicular to the axial direction formed in a row at a predetermined interval, and a lock pin that is selectively inserted into and removed from the guide grooves for shifting the gear. The lock pin is slidably supported on the rear cover of the machine, and the rear end of the lock pin is connected to the release fork of the clutch via a link mechanism. The lock pin is configured to be inserted into and removed from the guide groove, and a chamfer is formed at the tip of the lock pin, and the center groove of the three guide grooves is placed in the neutral position of the shift lever, and the grooves on both sides of the center groove are placed in the neutral position of the shift lever. It is characterized in that the central groove side of the both side grooves is formed with an inclined surface corresponding to the gear position of the shift lever.

[For production]

Based on such a configuration, according to the present invention, the lock pin is inserted into and removed from the guide groove formed in the shifter rod of the speed change operation mechanism in conjunction with clutch operation, so that the clutch is When connected, the lock pin is inserted into the guide groove of the shifter rod, making it impossible to shift. Therefore, it is not possible to shift too quickly before the clutch is completely disengaged during gear shifting, and there is no risk of erroneous operation, which improves gear shifting operability by preventing gear slippage and gear noise during reverse shifting. can.

In addition, a chamfer is formed at the tip of the lock pin that is inserted and removed in conjunction with the clutch operation, and an inclined surface is formed on the neutral position side of the guide groove corresponding to each gear position of the shifter rod. When the clutch is connected after operation, the movement of the shifter rod is assisted by the distal end of the lock pin which is pushed back by the reaction force of the disc spring of the clutch, thereby reducing the operating force during gear shifting.

〔Example〕

Hereinafter, one embodiment of the present invention will be specifically described based on the drawings.

Referring to FIG. 1, the overall configuration of a vertical transaxle manual transmission will be described. A rear cover 2 is coupled to the rear of a transmission case l. The transmission case l has a split structure with left and right halves, and is partitioned into three chambers 3 to 5, with the front chamber 3 containing the clutch B having a disc spring 6a, and the middle chamber 4 containing the front differential device IO. , rear chamber 5 and rear cover 2
- A transmission 20 is provided inside, a crankshaft 7 from the engine is connected to an input shaft 8 of the transmission 20 via a clutch B, and an output shaft 9 thereof is connected to a front differential device 10.
is connected to.

The front differential device 10 includes a drive pinion 11 formed at the front end of the output shaft 9.
meshes with the crown gear 12 to constitute a final reduction gear, and a differential device 13 integrally provided at the center of the crown gear 12 is connected to the front wheel side.

The transmission 20 is a forward gear 5 with a constant mesh type overdrive.
It has one reverse gear, and the output shaft 9 is arranged parallel to the input shaft 8 below, and the transmission case l
A first speed gear 21.22, a second speed gear 23.24, a third speed gear 25.2B, and a fourth speed gear 27.28 are provided between the shafts 8 and 9 on the side. Here, the driven side gears 22, 24 for the first speed and second speed are rotatably fitted to the output shaft 9, and a synchronization mechanism 29 is provided between these three, and the driven side gears 22, 24 for the third speed and fourth speed Then drive side gear 25.2
7 is rotatable on the input shaft 8, and a synchronization mechanism 30 is provided between these three. Further, for reversing, the idler gear 3B is adapted to move and mesh with the drive gear 31 of the input shaft 8 and the driven gear 32 on the sleeve side of the synchronizer mechanism 29. Further, the rear portions of the input shaft 8 and the output shaft 9 protrude into the rear cover 2, and a rotatable drive gear is provided on the cover 2 side with a fifth speed gear H, 34 between both shafts 8, 9. A synchronizing mechanism 35 is provided between the input shaft 33 and the input shaft 8.

In this way, by selectively engaging the three sets of synchronizing mechanisms 29, 30, and 85 with the transmission gear side or meshing the idler gear 3B, the transmission power for five forward speeds and one reverse speed is taken out to the output shaft 9.

Therefore, the shift mechanism in the above transmission will be explained.

First, the shifter arm 42 is integrally attached to the shifter rod 41 from the shift lever 40. Also, inside the transmission case l, the shifter arm 4
2 includes first and second gear shifter rails 43.2 extending from the bottom of the transmission case 1 upward. A shifter rail 44 for third and fourth gears and a shifter rail 45 for fifth gear and reverse gear are sequentially arranged in parallel, and these shifter rails 41, 44° 45 are movably supported via the partition wall of the transmission case 1. . Connecting arms (not shown) extend from the rear of each of the shifter rails 43, 44, 45 to the vicinity of the lower end of the shifter arm 42, and are selectively engaged with the ends of these arms at each select position by rotation of the shifter arm 42. The four parts are formed as follows.

Note that an interlock mechanism (not shown) is provided between each of the shifter rails 43, 44, and 45 for speed change to prevent multiple rails from moving at the same time.
A lock ball mechanism (not shown) is also provided to provide a sense of moderation during operation.

On the other hand, by moving the shifter rod 41 in the axial direction, the synchronizing mechanism 2
The sleeve of 9.30.35 is shifted to a predetermined gear, and the shifter rod 41 is provided with a locking mechanism 50 to ensure the shifting operation.

The locking mechanism 50 has three guide grooves 5 bored perpendicularly to the shifter rod 41 as shown in FIG.
1,52,53, and a lock pin 16 slidably supported by the boss portion 2a of the rear cover 2 so as to be selectively inserted into and removed from the guide groove 51, 52, 53.

That is, the guide grooves 51° 52 of the shifter rod 41
, Fd are provided in a line along the axial direction of the shifter rod 41, and when the center guide groove 51 is set to the neutral (N) position of the shift pattern, the guide groove 52 in front of it is set to the first gear and the first gear. Each guide groove 51, 52, 5 is set to the shift position for 3rd gear and 5th gear, and the rear guide groove 53 is set to the shift position for 2nd gear, 4th gear, and reverse.
3 axial spacing 11. J2 is determined in accordance with the shift amount of the shift lever 40, and as shown in FIG. 3, grooves are cut out in the circumferential direction corresponding to the select and rotate angles of the shift lever 40.

Further, as shown in FIG. 4, a chamfer lea is formed at the tip of the lock pin 1B that is inserted into and removed from the guide groove 51, 52, 53, as shown in FIG.
It is connected to the release fork 15 via an arm 17 rotatably supported by a bracket 2b fixed to the rear cover 2 and a link mechanism 18. Then, when the clutch pedal 14 is depressed and the clutch B is disengaged by the release fork 15 during a gear shift operation, the lock pin 16 is lifted and separated from the guide groove 51, 52, 53 of the shifter rod 41, as shown in FIG. Therefore, the shifter rod 41 can freely rotate and move in the axial direction, making it possible to perform a predetermined speed change operation.

Further, after a predetermined speed change operation is completed by the shift lever 40 via the shifter rod 41, the clutch pedal I
When the pedal 4 is released, the disc spring 8 of the clutch 6
The release fork 15 is returned by the reaction force caused by a, and the lock pin 1B is pushed down via the link mechanism 1g and the arm 17 interlocked with this, and is inserted into a predetermined guide groove 51, 52, 53 of the shifter rod 41.

Next, the operation of the shift operating device configured as described above will be described.

First, when operating the shift lever 40 to change gears, the clutch 6 must be disengaged.
When the clutch pedal 14 is depressed and the clutch 6 is disengaged,
a link mechanism Ill connected to the release fork 15;
The lock pin 16 is lifted via the arm I7, and the shifter rod 41 becomes freely rotatable and axially movable.

Therefore, after selectively operating the shift lever 40 left and right to engage the shifter arm 42 with a predetermined shifter rail,
When the shifter rod 41 is moved forward or backward, the sleeve of the corresponding synchronizing mechanism 29, 30, 85 meshes with a predetermined gear, thereby shifting to a predetermined gear.

Further, after the above shift operation is completed, by releasing the clutch pedal 14, the clutch B is connected and the engine power from the crankshaft 7 is transferred to the transmission 2.
At the same time, the release fork 15 is returned by the reaction force of the disc spring 6a of the clutch B, and the lock pin 18 is pushed down and inserted into the guide groove 52 or 53 of the shifter rod 41.

Therefore, the clutch 6 is completely disengaged.

In other words, since a shift operation cannot be performed unless the lock pin 16 is disengaged from the guide groove 51, 52, 58 of the shifter rod 41, erroneous operations such as premature shift operation before the clutch 6 is completely disengaged will not occur, and the synchronization mechanism will In addition to preventing damage to the clutch and gear noise during reverse shifting, the shifter rod 41 cannot be returned to neutral unless the clutch is released after a shift operation, so it is possible to prevent the gear from slipping out. can.

6 and 7 are cross-sectional views of main parts showing another embodiment of the present invention, in which the lock pin 16 is inserted and removed in conjunction with clutch operation, and the guide groove 51 of the shifter rod 41.
52.5 out of 52.53, the guide grooves 52.5 correspond to each gear position except for the guide groove 51 at the central neutral position.
On the neutral position side of No. 3, an inclined surface 52a,
53a.

Guide groove 52 of shifter rod 41 configured in this way
．． According to No. 53, the shift operation cannot be performed unless the clutch 6 is completely disengaged, which is similar to the embodiment of the present invention. Furthermore, when the clutch pedal 14 is released from the clutch pedal 14 after the shift operation, the lock pin [6] can be easily inserted, and the lock pin 1B is forcibly pushed down by the reaction force of the disc spring 8a of the clutch B, so that the lock pin 1B can be locked. The tip chamfer 16a of the pin 1B is pressed against the inclined surfaces 52a and 53a of the guide groove 52, 53 of the shifter rod 41, and a component of the pushing force of the lock pin 16 is applied to the inclined surface 52.
a, 53a, the shifter rod 41 moves in the axial direction, so the shift operation force of the shift lever 40 is reduced.

In the embodiment according to the present invention, each of the guide grooves 51, 52, 53 of the shifter rod 41 is formed with grooves in the circumferential direction corresponding to the select rotation angle of the shift lever 40. Lockpi in response.

It is also possible to use a pin hole into which the pin 16 is inserted and removed.

〔Effect of the invention〕

As described above, according to the present invention, the lock pin is inserted into and removed from the guide groove formed in the shifter rod in conjunction with the clutch operation during the gear shifting operation of the manual transmission, so that the clutch is completely shifted. Since the shift operation cannot be performed unless the clutch is disengaged, there is no possibility of incorrectly shifting the gear too quickly before the clutch is completely disengaged, which can prevent damage to the synchronizer mechanism or clutch, and gear noise during reverse shifting. This problem has been resolved, and the gear will not slip out unless the clutch is completely disengaged.

In addition, the neutral side of the guide groove corresponding to each gear position where the lock pin is inserted and removed is made into an inclined surface.
The reaction force of the disc spring of the clutch acts on the lock pin, and a component of the push-down force of the lock pin acts on the inclined surface of the guide groove, allowing the shifter rod to move smoothly and reducing the shift operation force. It is possible to improve operability, such as by being able to

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of a transmission to which the present invention is applied, Fig. 2 is an enlarged sectional view showing the main part of Fig. 1, and Fig. 3 is a sectional view taken along 4 is a side view showing the lock pin of FIG. 2, FIG. 5 is an operation diagram showing the shift operation according to the present invention, and FIGS. 6 and 7 are cross sections of main parts showing other embodiments according to the present invention. It is a diagram. 6...clutch, 8...input shaft, 14...clutch pedal, 15...release fork, lock pin, tea...chamfer, 17...arm,
18...Link mechanism, 20...Transmission, 40...
Shift lever 141...Shifter rod, 42...Shifter arm, 50...Lock mechanism, 51.52°53
... Guide groove, 52a, 53a... Slanted surface.

Claims (2)

[Claims] (1) A shift operating device for a manual transmission in which a sleeve of a synchronizing mechanism is shifted to a predetermined shift gear side via a corresponding shifter rail by moving a shifter rod from a shift lever in the axial direction. In this system, three guide grooves perpendicular to the axial direction are bored in a line at a predetermined interval, and a lock pin that is selectively inserted into and removed from the guide groove is slidably attached to the rear cover of the transmission. The rear end of the lock pin is connected to the release fork of the clutch via a link mechanism, and the lock pin is configured to be inserted into and removed from the guide groove of the shifter rod in conjunction with clutch operation during gear shift operation. A speed change operation mechanism for a transmission characterized by: (2) A chamfer is formed at the tip of the lock pin, and the central groove of the three guide grooves corresponds to the neutral position of the shift lever, and the grooves on both sides of the central groove correspond to the gear position of the shift lever. Claim (1) characterized in that the central groove side of the both-side grooves is formed with an inclined surface.
A speed change operation device for the transmission described above.