JPH10297300A - Manual change gear device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the feeling of the shift operation by newly constituting a mechanism of an over select stopper in a change mechanism in which a shift piece and a lock plate are used together. SOLUTION: A shift piece 15 is fixed to a shift and select shaft 14 so that it turns at the time of select in the interlocking relationship with a change gear lever 11 and slides at the time of shift. A regulation plate 17 has an opening which specifies a scope of travel on a shift and select shaft side and can move and regulates the turn of a turn support point part 15b of the shift piece 15 directly by specifying the scope of travel on the shift and select shaft side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual transmission for an automobile, an industrial vehicle, and the like, and more particularly to a shift lever having a good shift feeling.

[0002]

2. Description of the Related Art Various types of mechanisms for preventing double meshing (interlock) of a manual transmission have been conventionally proposed, and FIG. 4 shows one type thereof. In FIG. 4, reference numeral 1 denotes a shift-and-select shaft which rotates around a shaft center at the time of selection in conjunction with a speed change lever (not shown) supported on the housing 2 and slides in the shaft center direction at the time of shifting. A shift and select lever 3 (hereinafter referred to as a shift piece) is fixed to the shift and select shaft 1. The shift piece 3 has a fitting claw 3a protruding in a radial direction from a ring-shaped rotation fulcrum 3b fitted to the shift and select shaft 1. The fitting claw 3a is adapted to selectively fit into a shift groove formed in a shaft (not shown) for shifting (also referred to as a shift arm). A lock plate 4 for an interlock function is arranged on the outer periphery of the rotation fulcrum 3b of the shift piece 3. The lock plate 4 is provided with a concave portion 5 in which a predetermined angular range of the outer peripheral edge is cut out, and a bolt 6 installed in the housing 2 is connected to the concave portion 5.
, The rotation range of the shift piece 3 is adjusted. The lock plate 4 extends in the radial direction parallel to the fitting claw 3a of the shift piece 3, and has two lock claws 4a that sandwich the fitting claw 3a when the shift lever is in the neutral position.

In the manual transmission described above, when the shift lever is at the neutral position, the shift piece 3 engages with the lock pawl 4a.
In the state of being pinched. When the manual operation lever is operated in the select direction in order to fit the fitting claw 3a of the shift piece 3 into a desired shift groove, the lock plate 4 rotates together with the shift piece 3 so that the other gears mesh with each other. The shift piece 3 is prevented from being fitted into the proper shift groove.
This prevents a double fitting operation (double meshing).
Only the shift piece 3 slides the fork by the subsequent operation of the shift lever in the shift direction, and the fork that slides with the slide of the shift piece 3 meshes with desired gears to perform a shift. is there.
The lock plate 4 regulates the rotation range of the shift piece 3 when the bolt 6 comes into contact with the circumferential stop wall of the recess 5.

[0004]

However, the conventional manual transmission has the following problems. FIG. 5 shows a state in which the manual operation lever is operated in one select direction. Shift piece 3 in this state
, The select load F is still applied, and a moment is generated in the shift piece 3 by the load F having the center B of the shift and select shaft 1 as a fulcrum. At this time, the rotation of the lock plate 4 is stopped by the bolt 6, and the load F is applied to the lock claw 4 holding the shift piece 3.
Acts on the contact surface of a. Load F acting on this contact surface
Is increased by this principle because the distance from the rotation axis (fulcrum B) of the shift piece 3 to the contact point A is smaller than the length of the shift lever, and is increased by this principle.
When the manual operation lever is shifted, a sliding resistance or a frictional resistance such as a stiff feeling is generated, thereby deteriorating the shift feeling.

When the shift is performed with the select load applied as described above, the load applied to the manually operated lever is increased by the lever ratio, and an extremely large load is applied to the contact surface of the lock plate 4. Due to this large load, the lock plate 4 is deformed, so that the select amount cannot be regulated accurately. In order to prevent this deformation, the rigidity of the lock plate 4 must be increased,
A significant increase in wall thickness is required, resulting in an increase in weight.

Therefore, the problem to be solved by the present invention is as follows:
An object of the present invention is to prevent a load from being applied to a lock plate even when a shift is performed with a select load applied.

[0007]

In the manual transmission according to the present invention, a shift piece is fixed to a shift-and-select shaft which rotates at the time of selection and slides at the time of shift in conjunction with a shift lever, and which is used at the time of shifting. Are selectively fitted into the shift grooves of the plurality of shift arms, and a lock plate is fitted into the shift piece. When the shift piece is fitted into one shift groove, the lock plate is fitted into the remaining shift grooves. In a manual transmission that locks together
It is characterized in that a regulating plate having a movable opening for defining a moving range of the shift lever on the shift and select shaft side is provided.

In the manual transmission according to the present invention, the rotation range of the shift and select shaft, which is the rotation fulcrum of the shift piece, is defined by the rotatable opening of the regulating plate. The select load on the piece is almost insignificant on the lock plate. Therefore, even if the shift lever is shifted while a select load is applied, no inclination or the like occurs in the gap between the shift piece and the lock plate, and the sliding resistance and frictional resistance such as a twisting feeling are dramatically reduced. The shift piece slides the lock plate smoothly.

In the manual transmission according to the present invention, the stopper surface when the shift lever is selected is the rotatable opening end surface of the restricting plate as the rotation restricting member. The shift feeling is not impaired by ensuring the slidability with the member on the side of the shift and select shaft that comes into contact. In the restriction plate of the manual transmission according to the present invention, since a load in one direction is applied to the opening end surface when the shift lever is selected, the restriction plate can be brought into contact with one side, and the shift cannot be performed without occurrence of twisting or the like. Nor.

[0010] The regulating plate of the manual transmission according to the present invention comprises:
It can be interposed at the joint between the upper part of the housing supporting the transmission lever and the lower part of the housing that houses the transmission gear mechanism and the like.

[0011]

In the manual transmission according to the present invention,
The rotation range is not restricted by providing a concave portion in the lock plate, but by restricting the rotation range on the rotation fulcrum side (shift and select shaft side) of the shift piece which is rotated by the selection operation of the shift lever. As a result, there is almost no select load applied to the lock plate from the shift piece, and the shift piece is prevented from sliding against the lock plate.

Further, since the select load of the speed change lever is directly applied to the contact surface (opening end surface of the regulating plate) for regulating the pivot range on the pivot point side, the feeling of rigidity is high and the shift feeling is dramatically improved. Is obtained.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 shows an example of a manual transmission according to the present invention. This manual transmission has a shift lever 1
1, an upper housing 12 having a control retainer 12a that supports the shift lever 11 so as to swing in a shift direction and a select direction, a lower housing 13 in which the upper housing 12 is fitted, and a lower housing 13 Shift and select shaft 14 disposed rotatably in the shaft
A shift piece 15 fixed to the shift and select shaft 14, a lock plate 18 fitted to the outside of the shift piece 15,
A connecting member 16 connecting a rotation fulcrum 15b of the shift piece 15 and a spherical end 11a in which the speed change lever 11 extends into the lower housing; an upper housing 12 and a lower housing 13; And a regulating plate 17 interposed in the fitting portion.

The shift piece 15 is a ring-shaped rotation fulcrum 15b fitted to the shift and select shaft 14.
And a fitting claw 15a extending in a radial direction from the rotation fulcrum 15b. The regulating plate 17 is shown in FIG. 3 and has an opening 17a at the center which covers the swing range of the connecting member 16. The opening 17a serves as each stopper surface when the shift lever 11 swings in the select direction C, and has an end surface 17b along the shift direction S. The end face 17
b has a smooth surface. The regulating plate 17 is attached such that the outer edge is sandwiched between the lower end surface of the upper housing 12 and the upper end surface of the lower housing 13 by bolts inserted into four bolt holes formed in the outer edge portion.

The connecting member 16 has one end connected to the pivotal support 15b of the shift piece 15 and the other end into which the spherical end 11a of the transmission lever 11 is inserted.
have a. The housing part 16a transmits the free movement of the spherical end part 11a to the rotation fulcrum part 15b of the shift piece 15 as sliding and rotation in the axial direction. The housing part 16a has convex parts 16a1 and 16a2 corresponding to the end face 17b of the regulating plate 17, respectively. Each convex part 16a
The end surfaces of 1 and 16a2 are flattened, and the end surfaces make flat contact with the end surface 17b of the regulating plate 17 when the shift lever 11 is tilted in the select direction.

In the manual transmission according to one embodiment of the present invention, the lock plate 18 is disposed outside the shift piece 15, but the recess formed in the lock plate 18 does not receive a load during shifting. . In the manual transmission having such a configuration, when the shift lever 11 is operated in one select direction (leftward in the figure) as shown in FIG.
The spherical end 11a of the speed change lever 11 moves in an arc shape rightward. The housing portion 16a of the connecting member 16 absorbs the arc-shaped movement of the spherical end portion 11a and transmits the movement to the rotation fulcrum portion 15b of the shift piece 15 as a rotation motion.
This causes the shift piece 15 to rotate about the shift and select shaft 14. At this time, when the selecting operation is further performed, the distal end surface of the right convex portion 16a2 of the housing portion 16a comes into contact with the flat surface on the opening end surface 17b of the regulating plate 17. The shift piece 15 selects a desired shift groove when the surface is hit.

When the shift lever 11 is operated in the shifting direction in a state where the opening end face 17b of the regulating plate 17 and the tip end face of the convex portion 16a2 of the housing portion 16a are in contact with each other, the contact surface becomes a smooth flat surface. Therefore, the contact surface is always stable and the smooth shift is possible in a state where the frictional resistance and the sliding resistance are constant, without contact at a point or occurrence of a tilt in a gap between the contact surfaces.
In addition, there is no occurrence of twisting due to single-sided contact, and no shifting is impossible.

On the other hand, when the shift lever is shifted, the shift piece 15 slides in the direction of the shift and select shaft 14. Even during this sliding, the fitting claw portion 15a sandwiched between the lock claw portions of the lock plate can move smoothly without substantially applying a load to the lock claw portion. In the present embodiment, an example in which the shift piece is integrated with the other end of the connecting member, one end of which is connected to the end of the shift lever, has been described. Applied. That is, the connecting member is rotatably supported in the vicinity of the central portion thereof so as to be rotatable and movable in the axial direction, and a concave portion is provided on the other end side. One end spherical portion of the shift piece fixed to the select shaft may be connected.
In this case, a lock plate is fitted outside the shift piece.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a manual transmission according to the present invention.

FIG. 2 is an explanatory diagram showing an operation state of the present invention.

FIG. 3 is a plan view showing the arrangement of a regulating plate and a housing according to the present invention.

FIG. 4 is a sectional view showing a conventional manual transmission.

FIG. 5 is an explanatory diagram showing a conventional operation state.

[Explanation of symbols]

11: transmission lever, 12: upper housing, 13: lower housing, 14: shift and select shaft, 15: shift piece, 16: connecting member, 17: regulating plate, 1
7a: movable opening.

Claims (1)

[Claims] A first lever which rotates in conjunction with a shift lever at the time of selection;
A shift piece is fixed to a shift and select shaft that slides at the time of shifting, and at the time of shifting, the shift piece is selectively fitted into shift grooves of a plurality of shift arms, and a lock plate is fitted to the shift piece. In a manual transmission in which a lock plate is fitted and locked in the remaining shift grooves while a piece is fitted in one shift groove, a movement range of the shift lever on the shift and select shaft side is defined. A manual transmission comprising a regulating plate having a movable opening.