JPS6214451Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a misshift prevention device for a gear change operation mechanism in a multi-speed transmission, and more specifically, the device works in conjunction with a control rod that operates in the shift direction and the select direction, and selects by operating the rod in the select direction. an engaging member that moves on the line and swings on the shift operation line when operated in the shift direction;
The present invention relates to a misshift prevention device for a speed change operation mechanism in which two forward gears and two reverse gears are arranged on the same shift operation line.

Generally, in the shift operation mechanism of a multi-speed transmission, when one forward gear, for example, the 5th gear and the reverse gear are arranged on the same shift operation line of the shift lever as described above, the state is shifted to the 5th gear. When shifting down from 4th gear to 4th gear, there is a risk of accidentally overshifting beyond the neutral position and into reverse gear, which may result in gear chatter or damage to the gear.

Therefore, conventionally, in order to prevent the misshift to the reverse gear as described above, as shown in Japanese Patent Publication No. 52-2063, a gear shift operation mechanism is connected to a shift lever, and a shift lever is connected to the shift lever, and the shift lever is shifted. a protrusion that is integrally provided on an engaging member that moves on a straight line of operation and swings in a plane perpendicular to the straight line of shift operation when a shift lever is selected, and a shift operation of the forward gear and reverse gear; A pin housing that accommodates a pin that can be retracted and retracted perpendicularly to the straight line, and a first spring that guides the pin in a retractable manner and springs the pin to a projected position, and that is movable on the shift operation straight line. In the above configuration, each of the components is assembled individually. Not only does it take time and effort to assemble, but maintenance and replacement of parts is also extremely troublesome and time consuming.

The present invention was devised in view of the above circumstances, and the object thereof is to provide a misshift prevention device that is mechanically simple and can be easily assembled to the speed change operation mechanism.

That is, in the present invention, a control body is supported on a support that supports the engagement member so as to be movable and rotatable in the same direction as the movement direction of the engagement member, and the control body is disposed between the control body and the support. A regulating means for regulating a rotation range is provided, and the control body is placed in the original position opposite to the direction of movement of the engagement member toward the forward/reverse shift operation line, and in the rotation direction approaching the engagement member. The engaging member is provided with a protrusion, and the control body is engaged with the protrusion to follow the control body when the engagement member is moved to a forward/reverse shift operation line. , characterized in that an engaging protrusion is provided that overlaps the protrusion when the control body returns to its original position when the engaging member swings to the forward gear shift position on the forward/reverse gear shift operation line. It is.

The present invention will be described below based on embodiments shown in the drawings.

First, Fig. 8 shows the shift pattern of the shift lever in the speed change operation mechanism that operates a multi-speed transmission (not shown) with 5 forward speeds and 1 reverse speed, and the shift lever is selected from the N ₀ position to the N ₁ position. The transmission can be shifted to the first or second speed by operating the shift lever from the _N1 position to the _F1 or _F2 position.
3rd or 4th speed can be obtained by shifting from the N ₀ position to the F ₂ or F ₄ position, and when the shift lever is selected from the N ₀ position to the N ₂ position, the N 5th speed or reverse speed can be obtained by shifting from _{the 2} position to the F ₅ position or the R position, and the F ₅ position and the R position are in a straight line with the N ₂ position in between. It is placed.

Next, in FIGS. 1 to 7, reference numeral 1 denotes a control rod rotatably and axially movably supported on the transmission case 10.
is operatively connected to the shift lever (not shown) via a link mechanism (not shown), and is configured to be rotated by a select operation of the shift lever, and to be moved in the axial direction by a shift operation of the shift lever. has been completed.

Reference numeral 2 denotes a support having a substantially U-shaped cross section that is fixed in the transmission case 10 by bolts 11, 11. An engaging member 3 is provided which is a bell crank that moves on the select operation line and swings on the shift operation line when the rod 1 is operated in the shift direction, that is, moved in the axial direction.

Specifically, a pivot 30 extending in a direction perpendicular to the control rod 1 is mounted between the opposing side plates 21 and 22 of the support 2, and the first and second interlocking arms 31 are attached to the pivot 30. , 32, and the spring 3
3 and 34, and a radially extending operating rod 12 is connected to the end of the control rod 1, and the operating rod 12 and the first interlocking arm of the engaging member 3 are connected to each other. 31 and the spherical body 31
a and a cylindrical portion 12a into which the spherical body 31a is loosely fitted.

Further, 4a is a shift fork shaft for 1st speed and 2nd speed, 4b is a shift fork shaft for 3rd speed and 4th speed, and 4c is a shift fork shaft for 5th speed and reverse speed. Shaft 4
Shift heads 40a, 40b, 40c are parallel to each other and are slidably supported on the transmission case 10, and are pin-coupled to each of these shafts 4a, 4b, 4c.
are provided with pawls 42a, 42b, 42c formed with engagement grooves 41a, 41b, 41c that engage with the second interlocking arm 32 of the engagement member 3, and when the shift lever is selected, the The free end of the second interlocking arm 32 is engaged with a predetermined engagement groove via the control rod 1, and the second interlocking arm 32 is moved by a shift operation of the shift lever.
By sliding a predetermined shift fork shaft via the gear shift fork shaft, the transmission is switched to a predetermined gear position.

That is, by selecting the shift lever from the _N0 position to the _N1 position, the control rod 1
When the engaging member 3 is rotated in the _X1 direction in FIG. 1, the engaging member 3 moves by a predetermined stroke downward in FIG. 32 is adapted to engage with an engagement groove 41a of a shift head 40a of the shift fork shaft 4a for the first and second speeds.

When the control rod 1 is moved in the _Y1 direction _{or Y2} direction in FIG. 1 by shifting the shift lever from this position to the F1 position or _F2 position, the engaging member 3 is moved to the third position.
The shift fork shaft 4a for 1st and 2nd speeds slides in the axial direction via the second interlocking arm 32 to shift to the 1st or 2nd speed. It is becoming possible to obtain

Furthermore, by shifting the shift lever from the _N0 position to the _F3 or _F4 position, the control rod 1 is moved in the _Y1 direction in FIG.
When moved in the _Y2 direction, the engagement member 3 swings to the position shown in FIG.
3rd or 4th speed can be obtained by sliding through the .

Furthermore, by selecting the shift lever from the _N0 position to the _N2 position, the control rod 1 is moved to the first position.
When rotated in _{the two} directions in Figure X, the engaging member 3
A predetermined stroke is moved upward in FIG. 2 via the connecting rod 12, and the second
The interlocking arm 32 is adapted to engage with an engagement groove 41c of a shift head 40c of a shift fork shaft 4c for the fifth reverse speed.

And from this position, F ₅ of the said shift lever
By shifting the control rod 1 to the Y1 position or R position, the control rod 1 is moved in the _Y1 direction in Figure 1 or
When moved in the _Y2 direction, the engaging member 3 swings in the clockwise direction or counterclockwise direction in FIG.
Along with this, the shift fork shaft 4c for the fifth speed and reverse speed slides via the second interlocking arm 32, so that the fifth speed or reverse speed can be obtained.

Accordingly, the present invention provides a speed change operation mechanism configured as described above, in which a second interlocking arm 3 is attached to the engaging member 3.
A protrusion 5 extending in the opposite direction to 2 is integrally formed.

On the other hand, a separately formed control body 6 is supported on the support 2 supporting the engagement member 3 so as to be movable and rotatable in the same direction as the movement direction of the engagement member 3. regulating means 7 for regulating the rotation range of the control body 6 between the control body 6 and the support 2;
We will set up the following.

Specifically, both side plates 21, 2 of the support 2
A support shaft 60 is mounted between the two in parallel with the pivot shaft 30 that pivots the engagement member 3, and the cylindrical control body 6 is loosely inserted into the support shaft 60.

Further, a circular hole 7 is formed in one side plate 21 of the support 2.
1, and a regulating piece 7 provided with a rod 72 having a smaller diameter than the circular hole 71 in the control body 6.
3 are connected in series, and the rod 72 is loosely inserted into the circular hole 71, so that the rotation range of the control body 6 is adjusted to the circular hole 7.
This is done to limit the gap S between the rod 72 and the rod 72.

A coil spring 61 is interposed between the control body 6 and the other side plate 22 of the support 2, and by locking one end of the spring 61 to the side plate 22 and the other end to the control body 6, The control body 6 is placed at the original position (solid line position in FIG. 2) opposite to the direction of movement of the engagement member 3 toward the forward/reverse shift operation line (upward direction in FIG. 2), and also at the engagement protrusion 8 to be described later. is biased in the direction in which the engaging member 3 rotates toward the protrusion 5 (counterclockwise direction in FIG. 3).

Further, an engagement protrusion 8 that projects outward in the radial direction and toward the engagement member 3 is integrally provided on the control body 6,
As shown in FIG. 3, only when the engaging member 3 moves to the forward/reverse shift operation line in response to a selection operation from the N ₀ position to the N ₂ position of the shift lever, the engaging protrusion 8 is connected to the engaging protrusion 8 as shown in FIG. 5 is engaged in the axial direction with a predetermined wrap distance R, specifically, a wrap distance R corresponding to the gap S between the circular hole 71 and the rod 72, so that the control body 6 is driven, and the engagement is The protrusion 5 accompanies the swinging of the mating member 3 to the forward gear (5th gear) shift position on the forward/reverse gear shift operation line.
When the engagement protrusion 8 is disengaged in the axial direction, the control body 6 is returned to its original position (solid line position in FIG. 2) by the spring 61, and the protrusion 5 overlaps the engagement protrusion 8 in the swinging direction. It was accomplished as much as possible.

The misshift prevention device of the present invention is constructed as described above, and FIGS. 2 and 3 show a state in which the shift lever is located at the N ₀ position, and from this position the shift lever is selected to the N ₂ position. When operated, the engaging member 3 engages the control rod 1.
and move upward in FIG. 2 via the connecting rod 12,
Accordingly, the engaging protrusion 8 of the control body 6 engages with the protrusion 5 of the engaging member 3 in the axial direction, and the control body 6 is driven upward against the spring 61 as shown in FIG. let

When the shift lever is further shifted to the _F5 position from this state, the engaging member 3 swings a predetermined stroke in the clockwise direction in FIG. 3 and engages with the protrusion 5, as shown in FIG. Since the engagement with the protrusion 8 in the axial direction is released, the control body 6 returns to its original position due to the elastic force of the spring 61, as shown by A in FIG. The mating protrusion 8 overlaps with the engaging member 3 in the swinging direction.

When the shift lever is operated to return from the _F5 position to the _N0 position, or when downshifted from the _F1 to _F4 positions, the shift lever swings in the counterclockwise direction as shown in FIG. The protrusion 5 of the engaging member 3 engages with the engaging protrusion 8 of the control body 6 in its swinging direction, and attempts to rotate the control body 6 in the clockwise rotation direction in FIG. rotates by the gap S between the circular hole 71 and the rod 72, and any further rotation is prevented by the abutment of the rod 72 against the inner circumferential surface of the circular hole 71, as shown by B in FIG. The member 3 does not swing any further in the counterclockwise direction from the position shown in FIG. 7B.

Therefore, overshifting of the shift lever from the _F5 position to the R position beyond the _N2 position is prevented.

On the other hand, when the shift lever is selected from the N ₀ position to the N ₂ position as described above and then further shifted to the R position, the engaging member 3 is moved to the fourth position.
Since the shift lever pivots counterclockwise from the position shown in the figure, the axial engagement between the protrusion 5 and the engagement protrusion 8 is not released, as shown in FIG. When the engaging member 3 is operated to return from the R position to, for example, the _N0 position, the control body 6 prevents the engaging member 3 from swinging back from the position shown by B in FIG. 6 to the position shown by B in FIG. While being able to accurately perform the selection operation of the shift lever from the _N0 position to the _N2 position, and the shift operation from the _N2 position to the _F5 position and R position, the shift lever can be moved from the _F5 position to N Return operation to ₀ position or F ₁ to _{F 4}
This makes it possible to prevent overshifting to the R position during a shift operation to the R position.

As described above, according to the present invention, in the shift operation mechanism of a multi-speed transmission in which one forward gear and one reverse gear are arranged on the same shift operation line, the shift lever can perform a return operation from the forward gear shifting position to, for example, the neutral position. Not only can this eliminate the risk of accidentally overshifting to the reverse gear position, but also because each member constituting the misshift prevention device of the present invention is assembled to the support of the engaging member. The misshift prevention device of the present invention can be incorporated into the speed change operation mechanism by the simple operation of fixing a support with pre-assembled components to a predetermined location of the transmission case, and therefore, the assembly workability is extremely good. It is.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway bottom view, FIG. 2 is a partially cutaway side view showing an enlarged main part, and FIG. 3 is a partially cutaway side view of the main part. Line sectional views and Figures 4 to 7 are explanatory diagrams of the operation of the misshift prevention device of the present invention. Figure 4 shows when the shift lever is selected to the _N2 position, and Figure 5 shows when the shift lever is moved to the _F5 position. When the shift operation is performed, FIG. 6 shows when the shift lever is shifted to the R position, and FIG. 7 shows when the shift lever is shifted from the _F5 position to the _N2 position. FIG. 8 is a shift pattern diagram. 1...Control rod, 2...Support,
3... Engaging member, 5... Protrusion, 6... Control body, 7
...Regulating means, 8...Engaging protrusion.

Claims (1)

[Scope of utility model registration request] An engaging member is provided which is interlocked with a control rod that operates in the shift direction and the select direction, moves on the select operation line when the rod is operated in the select direction, and swings on the shift operation line when the rod is operated in the shift direction, In a shift operation mechanism in which two forward gears and two reverse gears are arranged on the same shift operation line, a control body can be moved and rotated in the same direction as the moving direction of the engaging member on a support that supports the engaging member. A regulating means for supporting and regulating the rotation range of the control body is provided between the control body and the support, and the control body is moved in a direction opposite to the direction of movement of the engagement member toward the forward/reverse gear shift operation line. In the original position on the side,
Further, the engaging member is biased in a rotational direction approaching the engaging member, and the engaging member is provided with a protrusion, and the control body is provided with a projection when the engaging member is moved to a forward/reverse gear shift operation line. engages with the control body to follow the control body, and when the engagement member swings to the forward gear shift position on the forward/reverse gear shift operation line, the control body overlaps the protrusion when the control body returns to its original position. A misshift prevention device for a speed change operation mechanism in a multi-speed transmission, characterized in that it is provided with an engaging protrusion.