JPS622176B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a select check mechanism to be used in a shift operating device for a transmission.

The transmission can change the power train by shifting the control rod in the axial direction after selecting the rotation direction.
A select check mechanism is required to intuitively inform which select position is at the time of select operation. Conventionally, this select check mechanism
The select check member shown in Japanese Utility Model Application Publication No. 55-86153, or a select check member in which a cam surface is set on the control rod itself or the gear shift operation parts linked thereto, and is biased by a spring toward this cam surface. It was common for the transmission to be constructed by being provided in the housing of the transmission.

However, with this configuration, the mounting portion of the select check member and the spring acting thereon must be machined into the transmission housing, and this machining is extremely difficult in part because the transmission housing is a large component. In addition, it is difficult to achieve accurate positioning of the mounting portion with respect to the cam surface, and the position of the select check member must be adjusted after it is mounted, resulting in poor workability for mounting the angle.

On the other hand, in the transmission of a transverse front engine front drive vehicle or a transverse rear engine rear drive vehicle, the control rod extends laterally to the forkshaft, so the shift operation force from the control rod is transferred to the forkshaft. It is necessary to change the direction so that it is parallel to the shift fork, and for this purpose a shift lever for changing the direction is inserted between the control rod and the shift fork, but even in such a transmission, the select check mechanism is The conventional configuration was adopted, which caused the above-mentioned problems.

In the case of such a transmission, the present invention provides that each of the shift levers is pivotally connected to a common support member, that the support member is attached to the transmission housing, and that the interlock plate is fixed in the shift operation direction by the support member. However, it is possible to configure a select check mechanism by providing a cam surface for a select check on one of these support members or the interlock plate, and providing a select check member biased by a spring toward the cam surface on the other side. The present invention is intended to provide a select check mechanism for a transmission that embodies this idea from the viewpoint that the problems of the conventional structure described above can be solved by this configuration.

Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

1 to 3 show a transaxle for a transverse front engine front drive vehicle having a transmission T equipped with a select check mechanism according to the present invention,
This transaxle forms a transmission T and a differential gear D into a single unit.

Drawings 1 and 2 show the housing portions of the transaxle, and the gear train of the transmission T is housed in the housing that combines these housing portions 1 and 2, and the differential gear D is rotatably supported. However, the housing part 2 also serves as a housing for the clutch 3.

Inside the housing part 1 is an input shaft 4.
and a main shaft 5 are disposed parallel to each other and supported rotatably, and the input shaft 4 has a 1st speed input gear 6, a 2nd speed input gear 7, a 3rd speed input gear 8, a 4th speed input gear 9 and a reverse input gear 10. In addition to providing integrally, 5
A high speed input gear 11 is rotatably supported, and the main shaft 5 is rotatably provided with main gears 12 to 15 that are in constant mesh with the first speed input gear 6, the second speed input gear 7, the third speed input gear 8 and the fourth speed input gear 9, respectively. At the same time, a main gear 16 that is always in mesh with the 5-speed input gear 11 is provided by spline fitting.

The main shaft 5 further has a main gear 12 or 13 drive-coupled to the main shaft 5 as appropriate.
- Synchronous mesh mechanism 17 for 2-speed shifting
A reverse main gear 19 is formed around the outer periphery of the coupling sleeve 18. This main gear 19 and the reverse input gear 10
A reverse idler gear 20 is rotatably and slidably fitted onto a fixed shaft 21 horizontally suspended within the housing 1 so as to be movable in the axial direction so as to be able to mesh appropriately with the housing 1 .

The main shaft 5 is also provided with a synchro-mesh mechanism 22 for 3-4 speed change, and this synchro-mesh mechanism 22 drives and connects the main gear 14 to the main shaft 5 by moving the coupling sleeve 23 to the right in FIG. Conversely, by moving the coupling sleeve 23 to the left, the main gear 15 can be drivingly coupled to the main shaft 5. Furthermore, the input shaft 4 is provided with a synchronized mesh mechanism 24 for selecting the fifth speed, and this synchronized mesh mechanism 24 is connected to the coupling sleeve 25.
By moving to the right in FIG. 1, the 5-speed input gear 11 can be drivingly connected to the input shaft 4.

A drive pinion 26 is integrally provided at one end of the main shaft 5, and is meshed with a ring gear 28 bound to a case 27 of a differential gear D, so that the drive pinion 26 and the ring gear 28 constitute a final drive. and,
Differential gear D is its gear case 27
Thrust bearings 29 and 30 are attached to both ends of the
The differential gear case 27 is sandwiched between the housing parts 1 and 2 and supported rotatably.
Both wheel drive shafts are inserted from the above-mentioned both ends, and these wheel drive shafts are coupled to both side gears (not shown) of differential gear D.

In the above configuration, the engine power input from the engine crankshaft 31 to the input shaft 4 via the clutch 3 is transmitted to the corresponding main gear via the 1st speed input gear 6, the 2nd speed input gear 7, the 3rd speed input gear 8 and the 4th speed input gear 9. 12, 13, 14 and 15 are rotated, but the coupling sleeves 18, 23, 25
As long as the reverse idler gear 20 and reverse idler gear 20 are in the positions shown in FIG. 1, engine power is not transmitted to the main shaft 5, and the transmission T is in a neutral state.

When the coupling sleeve 18 is moved to the right in FIG. The signal is then transmitted to the drive wheels, and the first forward speed is selected. Similarly, when the coupling sleeve 18 is moved to the left in FIG. 1, the second forward speed is achieved, and when the coupling sleeve 23 is moved to the right in FIG.
When the coupling sleeve 23 is moved to the left in FIG. 1, the fourth forward speed is selected. or,
When the coupling sleeve 25 is moved to the right in FIG.
is transmitted to the main shaft 5 via the main gear 16, and the fifth forward speed is selected. Furthermore, when the reverse idler gear 20 is moved to the left in FIG. transmission becomes possible and retreat is selected.

In order to be able to perform each of the above gear shifts,
Aluminum shift forks 32 to 3 that engage with outer circumferential grooves 18a, 23a, 25a (see Fig. 1) of each coupling sleeve 18, 23, 25
4 are provided as shown in FIG. 2, and these shift forks 32 to 34 are slidably fitted on a common shaft 35 parallel to the shafts 4 and 5. Notches 32b, 33b, 34b are formed in the operating ends 32a, 33a, 34a of the shift forks 32-34, respectively, and one ends of the direction-changing shift levers 36-38 are engaged with these. 70 is a cap made of sintered metal or resin. Reverse idler gear 20
As shown in FIG. 3, another shift lever 39 having a forked end 39a is provided so as to sandwich it from both sides, and these shift levers 36 to 39 are pivotally connected to a common pin 40.

The pin 40 is attached to the bracket 4, which is a single support member.
1 and extend in a direction perpendicular to the shaft 35, thereby moving the shift levers 36 to 39 to the pins 4.
For this purpose, the bracket 41 has a pair of prongs 41b and 41b on a base plate 41a, as shown in FIGS. 6 and 7, respectively.
41c is provided protrudingly, and a through hole 4 aligned with the protrusion is provided.
1d and insert pins 40 into these through holes 41d to pivotally support the shift levers 36 to 39 inserted between the prongs 41b and 41c on the bracket 41. The substrate 41a is provided with three holes for passing through the bolts 47, a circular projection 41e projecting from the lower surface thereof, and a positioning hole 41f.

As shown in Figures 2 and 3, the shafts 4 and 5
control rod 4 extending in a direction perpendicular to
2 is inserted into the housing part 2 and supported so as to be slidable and rotatable, and one end of the control rod 42 is projected from the housing part 2 to the outside so that selection (rotation) and shift (sliding) operations can be performed from the outside. do. Three notches 42a, 42b, 42c are formed adjacent to each other in the axial direction in the control rod 42, and a shift check ball 43 that can be inserted into these notches is inserted into a sleeve 44 inserted into the housing part 2. Along with guiding the spring 4
5 to bias the control rod 42.

As shown in FIGS. 2 and 3, the bracket 41 has a protrusion 41e inserted into a guide hole of the shift check ball 43, that is, a sleeve 44, and
The hole 41f is fitted into a positioning pin 46 implanted in the housing portion 2 for positioning, and then fastened to the housing portion 2 with a plurality of (three in the illustrated example) bolts 47.

Each of the shift levers 36 to 39 is a bell crank lever as shown in FIG.
38b and 39b are formed. A fan-shaped interlock plate 48 is engaged in these alignment shift grooves 36b, 37b, 38b, and 39b, and the interlock plate 48 is slidably fitted to the control rod 42, as shown in FIG. and a prong 41g provided on the bracket 41 as shown in FIG.
For 41 hours, the axial position is fixed by clamping as shown in FIGS. 4 and 5.

Interlock plate 48 as a whole
The boss portion 48 is constructed as shown in FIGS.
A is slidably fitted onto the control rod 42 and supported as shown in FIGS. 3 to 5, and
A notch 48b and a blind hole 48c are formed by opening at the arcuate free end surface. Inside the notch 48b is a tip 50a of a shift arm 50 connected to the control rod 42 by a pin 49 as shown in FIGS. 2 and 3.
As shown in FIGS. 3 to 5, the shift arm 50 is engaged with the interlock plate 4.
8 in the axial direction, but can rotate together in the rotational direction. A select check ball 51 as a select check member is housed in the blind hole 48c of the interlock plate 48, as shown in FIG.
The select check plate 41 provided on the bracket 41 as shown in FIGS. 6 and 7 is biased by
Press it on i. As shown in FIG. 7, the select check plate 41i is provided with a notch 41j into which the check ball 51 is inserted and a stepped portion 41k on which the check ball 51 rides, as shown in FIGS. 4 and 5. A cam surface for checking is formed, and the cam surface and the check ball 51
This constitutes the select check mechanism of the present invention.

Further, as shown in FIG. 8, the interlock plate 48 is provided with a projection 48e on its arcuate free end surface, which functions as a selection stopper as will be described later.

As shown in FIGS. 2, 3, and 5, the shift arm 50 is integrally provided with a select return arm 53 for fifth forward speed and reverse, and a roller 54 is rotatably supported at the tip of the arm 50. A select return unit 55 is provided opposite to the unit. This select return unit 55 is attached by inserting a holder 56 as shown in FIGS. 2 and 5 into the housing part 2, and a select return sleeve 57 is slidably fitted into the holder 56.
This select return sleeve 57 is urged toward the roller 54 by a spring 58, and a pin 59 driven into the holder 56 prevents the select return sleeve 57 from coming off. A vertical groove 57a is formed in the select return sleeve 57, and the reverse select check ball 60, which is recessed into the vertical groove, is slidably fitted into the horizontal hole 56a of the holder 56 and inserted into the hole 2a of the housing 2. A spring 62 accommodated therein and seated on a spring seat 61 biases the sleeve 57 through a ball 63, thereby forming a reverse select check mechanism which functions as described below.

The operation of the transmission equipped with the mechanism of the present invention as described above will now be described.

2 to 5 show the state when the control rod 42 is in the neutral position in both the select direction and the shift direction, and at this time the select check ball 51 is moved as shown in FIGS. 4 and 5. The select return arm 53 is recessed into the notch 41j to provide a neutral check in the select direction of the control rod 42, and the roller 54 contacts the sleeve 57 at the protrusion limit position as shown by the solid line in FIG. Tip 5 of arm 50
Similarly, as shown in FIGS. 4 and 5, the shift check ball 43 is engaged with the shift groove 37b of the shift lever 37, and the shift check ball 43 is recessed into the notch 42a as shown in FIG. Also, at this time, the coupling sleeves 18, 23, 25 and the reverse idler gear 20 are in the positions shown in FIG. 1, so the power from the engine crankshaft 31 is not transmitted to the differential gear D, and the vehicle is stopped. are doing.

Here, when the control rod 42 is selectively operated in the counterclockwise direction in FIGS. 4 and 5, the shift arm 5 rotates integrally with the control rod.
0 goes around the interlock plate 48,
The select check ball 51 is brought from the α line to the β line in FIG. 4, and at this time, the ball 51 is pushed against the spring 52, thereby providing a sense of moderation during the selection operation. During this operation, when the shift arm tip 50a reaches the imaginary line position in FIG. It is possible to know that the shift lever 36 is engaged with the shift groove 36b. In this state, when the control rod 42 is shifted to the right in FIGS. 2 and 3, the shift lever 36 is rotated in the counterclockwise direction in FIG. By moving the lever to the right in Figure 1, the first forward speed can be selected as described above. At the same select position, reverse the control rod 42 and set it to the second position.
When the shift operation is performed to the left in FIGS. 3 and 3, the shift lever 36 is rotated in the direction of the hour hand in FIG.
is moved to the left in FIG. 1 to select the second forward speed as described above.

During these shift operations, the shift check ball 43 moves from notch 42a to notch 42c in FIG.
Alternatively, the recessed position can be switched to 42b, and the resistance at the time of this switching can provide a sense of moderation during both of the above-mentioned shift operations.

When the control rod 42 is shifted to the right in FIGS. 2 and 3 at the neutral position in the selection direction, the shift lever 37 is rotated counterclockwise in FIG. By moving the ring sleeve 23 to the right in FIG. 1, the third forward speed can be selected as described above.
At the same select position, when the control rod 42 is reversely shifted to the left in FIGS. 2 and 3, the shift lever 37 is rotated in the direction of the hour hand in FIG. 23 to the left in FIG. 1, the fourth forward speed can be selected as described above.

A sense of moderation during these shift operations is also obtained by the check ball 43 in the same manner as during the shift operation to the first or second speed described above.

When the control rod 42 is selectively operated from the neutral position shown in FIGS. 2 to 5 in the direction of the hour hand in FIGS. Select check ball 5
1 is brought from the alpha line to the gamma line in FIG.
A sense of moderation can be obtained during the selection operation. At the same time, the return arm 53 is rotated integrally with the shift arm 50 in the direction of the hour hand in FIG.
Push the sleeve 57 through the roller 54 against the spring 58 so that the end 57b of the vertical groove 57a is aligned with the ball 60.
By colliding with , a sense of moderation can be obtained during the selection operation. When this feeling of moderation is obtained and the above selection operation of the control rod 42 is interrupted, the shift arm tip 50a is moved to the shift lever 38.
When the control rod 42 is shifted to the right in FIGS. 2 and 3 at this select position, the shift lever 38 shifts to the third shift groove 38b.
In the figure, the shift fork 34 is rotated in the counterclockwise direction.
The fifth forward speed can be selected as described above by moving the coupling sleeve 25 to the right in FIG.

A sense of moderation during this shift operation is obtained by switching the recessed position of the check ball 43 from the notch 42a to the notch 42c in FIG. 3.

Further, when the control rod 42 is operated from the neutral position in the direction of the hour hand in FIGS. 4 and 5 to a position higher than the 5th speed selection select position, the check ball 51 crosses the stepped portion 41k as shown in FIG. 5, the select return arm 53 pushes the select return sleeve 57 through the roller 54 to a greater extent than when the speed is selected, and the check ball 60 overcomes the longitudinal groove end 57b. Obtaining a sense of moderation during select operation in the reverse select direction 5
You can know that you have passed the speed selection select position. When the control rod 42 is further selected in the same direction, the protrusion 48l of the interlock plate 48 collides with the bracket 41 as shown by the imaginary line in FIG. It can be seen that the shift arm tip 50a has engaged with the shift groove 39b of the shift lever 39.
In this state, when the control rod 42 is shifted to the left in FIGS. 2 and 3, the shift lever 39 is rotated in the direction of the hour hand in FIG. 3, and the reverse idler gear 20 is moved from the solid line position in FIG. By moving it to the imaginary line position, that is, to the left in FIG. 1, it is possible to select the backward movement as described above.

A sense of moderation during this shift operation can be obtained by switching the recessed position of the check ball 43 from the notch 42a to the notch 42b in FIG. 3.

Incidentally, when the driver attempts to perform a shift operation between the above-mentioned select positions, the notch 48b of the interlock plate 48, which is held between the ears 41g and 41h of the bracket 41 to fix the position in the axial direction, Which shift groove 36b, 37
b, 38b, and 39b are not aligned, all shift levers 36 to 39 are prevented from rotating, and two adjacent shift levers are rotated at the same time during the above shift operation, so that two types of gear changes are performed simultaneously. Danger can be prevented.

Further, each shift operation amount of the control rod 42 causes the shoulder 42d of the control rod 42 to collide with the sleeve 44 on the one hand, or the shift arm 50 collides with the bracket 4 as shown in FIG.
1 and the end flange 42e of the control rod 42 against the sleeve 44, thereby providing a shift stopper. be. Furthermore, in this embodiment, the selection operation is performed by moving the control rod 42 in the rotational direction, and the shift operation is performed by moving it in the axial direction. Good too. In this case, the bracket 41 is arranged perpendicularly to the control rod 42.

Thus, as described above, the select check mechanism of the present invention has a cam surface on either the common support member that pivotally supports each shift lever to the transmission housing, or the interlock plate whose position in the shift operation direction is fixed by this, and the cam surface on the other. Since the select check member and the spring that urges the select check member toward the cam surface are provided in the transmission housing, there is no need to process the mounting part of the select check mechanism in the transmission housing, which is a large component and difficult to process. Work becomes easier. Furthermore, since the support member and the interlock plate on which the cam surface and select check member are respectively provided are positioned relative to each other in the shift operation direction by the cooperation of the two, the interlock plate is not interlocked with respect to the support member fixed to the transmission housing during assembly. By simply displacing the plate relatively in the select operation direction, the cam surface and the select check member can be brought to a predetermined relative position, which makes it easy to achieve positional accuracy between the cam surface and the select check member, and also makes it possible to It has various features such as no need for any position adjustment work. Furthermore, since each shift lever is pivotally supported by a single support member, the shift levers can be accurately positioned.

[Brief explanation of the drawing]

Fig. 1 is a developed cross-sectional view of a transaxle equipped with a select check mechanism according to the present invention, Fig. 2 is a front view showing the main parts thereof cut away, and Fig. 3 is an A-A in Fig. 2. 4 is a sectional view taken along line B-B in Figure 2, and Figure 5 is a sectional view taken along line C-C in Figure 2.
Figure 6 is a side view of the shift lever pivot bracket;
FIG. 7 is a partially cutaway front view thereof, FIG. 8 is a front view of the interlock plate, and FIG. 9 is a sectional view taken along line EE in FIG. 8. T...Transmission, D...Differential gear, 1, 2...Housing part, 18, 23, 2
5...Cut spring sleeve, 20...Reverse idler gear, 32-34...Shift fork,
35...Shift fork shaft, 36-39...Shift lever, 40...Shift lever pivot pin, 41
...Bracket (supporting member), 41j, 41k...
...Cam surface for select check, 42...Control rod, 43...Shift check ball, 4
8... Interlock plate, 50... Shift arm, 51... Select check member (ball), 52... Spring, 53... Select return arm, 54... Roller, 55... Select return unit.

Claims (1)

[Claims] 1. By rotating the control rod or by selecting one of the axial directions, the tip of the shift arm fixed to the control rod is moved to one direction-changing shift lever selected from a plurality of direction-changing shift levers. After engagement, when the control rod is shifted to the other side, it moves integrally with the shift arm in the select operation direction, but the position in the shift operation direction is fixed by an interlock plate that moves two or more of the aforementioned control rods. In a transmission capable of switching the power train by rotating the selected one direction changing shift lever while preventing the direction changing shift levers from being rotated at the same time, each of the direction changing shift levers is rotated. The levers are pivotally connected to a common support member, this support member is attached to the transmission housing, the interlock plate is fixed in the shift operation direction by the support member, and a select check is attached to one of the support member or the interlock plate. 1. A select check mechanism for a transmission, characterized in that a select check member is provided on the other side, and a select check member biased by a spring toward the cam surface.