JPH0148561B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel mission chaining device. More specifically, the present invention relates to a mission change device that employs a push/pull control cable as a means of transmitting operating force.

Conventional front engine front drive cars (FF cars) and rear engine rear drive cars (RR cars)
A link rod type transmission change device is generally used as a method for remotely controlling transmissions such as the following. However, recently, with the aim of reducing weight, simplifying the mechanism, and providing anti-vibration cables, cable-type transmission transmission systems have been used that replace link rods with two push/pull control cables as a means of transmitting operating force. It's starting to happen.

When changing from such a link rod system to a control cable system, the twisting operation of the rod is changed to a push/pull operation of the cable, so it is necessary to particularly consider the wiring layout. Therefore, in addition to changing the transmission device itself, it usually involves major changes to the components of the vehicle body, such as the front panel.

In addition, two push/pull control cables are routed in a narrow engine room, resulting in a complicated routing situation and an increase in the total bending angle of the cables.
The radius of curvature of the wiring also tends to become smaller. Therefore, there is a problem that the force transmission efficiency of the push/pull control cable is reduced, the backlash is increased, and the durability is reduced.

In order to transmit power smoothly under such harsh conditions, it is possible to use a push/pull control cable with high transmission efficiency and less play, but this is expensive and requires precise installation work. Therefore, it cannot actually be used.

In order to alleviate this drawback, as shown in FIG. It has been proposed that they are connected via complicated link mechanisms 54 and 55. This is done by keeping the cable conduit mounting bracket, terminal fitting, and lever as far apart as possible from each other, and removing any push/pull control cables 52, 5.
This is intended to increase the radius of curvature of No. 3.
However, in this case, the center line of the transmission change shaft is far apart from the center line of the vehicle body. Therefore, changing from the conventional link rod system requires major modifications to the vehicle body or major changes to the transmission. Another disadvantage is that the bending angle of the push/pull control cable is large.

In addition, as shown in Figure 1 of Japanese Patent Application Laid-Open No. 58-192118, a shift push/pull control cable is concentrically connected to the transmission change shaft, and an arm extending laterally from the shaft and a bell crank are connected. It is also known that the lever is directly connected to the lever through a pin-slot, and a select push/pull control cable is connected to the bell crank.

This device has the advantage of having a control cable system with a smaller curvature and a more compact structure than the device shown in Figure 5, but the connection between the arm and the bellcrank has a large amount of play, and moreover, after the select operation. When performing a shift operation, there is a problem that the movement is not smooth.

As a result of intensive research to solve the above problems, the inventor of the present invention has developed a shaft that performs a shift operation by moving in the axial direction and a select operation by rotating around the axis. a shift push/pull drive member provided substantially concentrically with the shaft and movable in the axial direction, one end of which is connected to one end of the shaft so as to be rotatable around the axis; and substantially parallel to the shaft. a push/pull drive member for selection, which is provided to be movable in the axial direction, and an arm extending radially outward from the shaft; a first lever rotatably connected to one end of the selection push/pull drive member; and a second lever rotatably connected to one end of the selection push/pull drive member. , an L-shaped bell crank that is substantially parallel to the arm and rotatably provided around an axis spaced apart from the shaft by the length of the connecting rod; The conventional link rod type device can be easily converted to a push/pull control cable type without major changes to components such as the front panel or the transmission. The present invention was completed based on the discovery of the novel fact that selection operations can be performed without being influenced by each other.

Next, the mission change device of the present invention will be explained with reference to the drawings.

FIG. 1 is a front view showing an embodiment of the mission changing device of the present invention, FIG. 2 is a partially sectional plan view of the mission changing device shown in FIG. 1,
FIG. 3 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 4 is a perspective view of essential parts showing another embodiment of a state in which the shift rod and shaft are connected in the mission change device of the present invention.

In Fig. 1, reference numeral 1 denotes a shaft for operating the fork of an automobile transmission, and a shift operation is performed by moving it in the axial direction, that is, in the direction of arrow A or arrow B, and around the axis 2, that is, in the direction of arrow C or arrow B. A selection operation is performed by rotating it in the D direction.

A shift cable 3, which is a push/pull control cable, is arranged substantially concentrically with respect to the shaft 1. A select cable 4, which is a push/pull control cable, is arranged substantially parallel to the shift cable 3. Outer casings 5 and 6 of the shift cable 3 and the select cable 4 are locked to a fixing member 9 by cable end members 7 and 8, respectively.

One end of the inner cable 10 of the shift cable 3 is connected to a shift rod 11 which is a shift push/pull drive member.
It is inserted into one end of the body and secured by caulking from the outside. Shift rod 11
is slidably inserted into a shift sleeve 12 extending from the cable end member 7 in the axial direction. The other end 13 of the shift rod 11 is connected to one end of the shaft 1 so as to be rotatable about the axis 2.

As shown in FIG. 2, one end of the inner cable 14 of the selection cable 4 is fixed to one end of a selection rod 15, which is a selection push-pull drive member. The selection rod 15 is slidably inserted into a selection sleeve 16 whose one end is swingably connected to the cable end member 8.

The other end of the selection rod 15 is the bell crank 1
It is rotatably connected to the first lever 18 of No.7. The bell crank 17 is pivotally supported by a pin 19 to a fixed member (not shown) such as a transmission cover so as to be rotatable in the directions of arrows E and F. The center of rotation of the bell crank 17 is located at a relatively distant position with respect to the shaft 1, and the bell crank 17, which creates a space in which a connecting rod 22 (to be described later) is interposed,
It has a second lever 20 extending substantially perpendicular to the lever 18.

An arm 21 is fixed to the shaft 1 and extends in substantially the same direction as the pin 19. Second lever 2
0 and the arm 21 are connected by a connecting rod 22. As clearly shown in FIG. 3, the connecting rod 22 is connected substantially perpendicularly to the arm 21 and the second lever 20 by ball joints 23 and 24 so as to be swingable.
The bell crank 17 and the pin 19 constitute a drive direction conversion mechanism for converting the axial push/pull reciprocating motion of the selection rod 15 into the axial reciprocating motion of the connecting rod 22.

Next, the operation of the transmission change device constructed as described above will be explained.

In FIG. 1, the inner cable 10 of the shift cable 3
When the shaft 1 is pushed and pulled in the directions of arrows A and B, the shaft 1 also moves in the directions of arrows A and B, and a shift operation is performed. At that time, arm 21 is also connected to shaft 1.
However, since the connecting rod 22 swings around the ball joint 23, the bell crank 17 and the selection rod 1
No. 5 is hardly affected by the shift operation.

Next, when the inner cable 14 of the selection cable 4 is pushed and pulled in the directions of arrows A and B, the bell crank 17 rotates in the directions of arrows E and F about the pin 19. As a result, the connecting rod 22 moves in the directions of arrows G and H, and the shaft 1 is rotated in the directions of arrows C and D via the arm 21. A selection operation is thereby performed. At this time, since the shift rod 11 and the shaft 1 are rotatably connected around the axis 2, the shaft 1 is not affected by the selection operation.

Also, when performing a shift operation after the select operation, the arrow E- of the bell crank 17 is
Ball joint 23 depending on the direction of rotation in the F direction.
and arms 21 are moving up and down, respectively, but the connecting rod 22 is at its ball joint 23.
It swings around the position of , and does not impede the movement of the shaft 1 in the axial direction. Therefore, even when the shaft 1 is rotated in the direction of the arrow C or the direction of the arrow D by the selection operation, the shift operation is smoothly performed. Furthermore, in the device of the present invention, between the shaft and the rod 11 and between the arm 2
1, the connecting rod 22, and the bell crank 17 are all rotatably or swingably connected, which has the advantage that there is little wear due to sliding friction, etc., and smooth movement can be maintained.

Since the shift cable 3 and the selection cable 4 are both concentric or parallel to the shaft 1, the transmission cable 3 and the selection cable 4 of the present invention can be installed, for example, in a tunnel section for passing the link rod in a conventional link rod type transmission engine transmission device. can be searched. Therefore, it has the excellent advantage that it can be changed to a cable-type transmission change device without changing the vehicle body, especially the front panel or transmission. Moreover, since the length of the cable is short and the cable is routed in a shape with little curvature, the force transmission efficiency of the push/pull control cable is high and there is little play (backlash).

Furthermore, since the shift cable 3 and the shaft 1 are arranged substantially concentrically, they can be connected very easily by the shift rod 11. For example, as shown in FIG. 4, a bush 31 extending perpendicularly to the rod 11 is fitted onto the outer periphery of the spherical other end 13 of the shift rod 11 so as to be swingable, and the bush 31 is fitted around the outer circumference of the other spherical end 13 of the shift rod 11 so that it can swing freely. When a hole 32 extending radially to the axis of the shaft 1 is bored and a notch 33 is formed from the hole 32 to the end face of the shaft 1 through which the shift rod 11 can be inserted, By inserting the bush 31 into the hole, the shift rod 11 and the shaft 1 can be connected very easily.

Also, as shown in FIG. 2, waterproof boots 25,
26 can be easily installed. Furthermore, the second
As shown in the figure, the selection sleeve 16 is made of a metal outer cylinder 28 having a spherical end 27 formed therein.
and an inner cylinder 30 made of synthetic resin having an annular protrusion 29 at one end that can engage with the inner surface of the spherical end 27, the sliding friction resistance between the selection rod 15 and the sleeve 16 is reduced. sleeve 1
6 strength is improved.

As described above, the transmission change device of the present invention can be easily applied to automobiles and the like that use conventional link rod type devices without significantly changing parts or the like. Moreover, it has many advantages, such as the overall structure, especially the wiring state, being simple, and the operation of one side having almost no effect on the operation of the other, so its practical value is extremely great.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the mission changing device of the present invention, FIG. 2 is a partially sectional plan view of the mission changing device shown in FIG. 1,
FIG. 3 is a sectional view taken along the line -- in FIG. 1, FIG. 4 is a perspective view of a main part showing another embodiment of the connection state of the shift rod and shaft in the mission change device of the present invention, and FIG. 5 is a conventional one. FIG. 2 is a perspective view showing an example of a mission change device. (Main symbols in the drawing), 1: Shaft, 2: Axial center,
3: Shift cable, 4: Select cable, 11: Shift rod, 12: Shift sleeve, 15: Select rod, 16: Select sleeve, 17: Bell crank, 19: Pin,
21: Arm, 22: Conrod, 23, 24:
ball joint.

Claims (1)

[Claims] 1. A shaft for performing a shift operation by moving in the axial direction and performing a select operation by rotating around the axis, and a shaft that can be moved approximately concentrically with the shaft and in the axial direction. a shift push/pull drive member, which is provided at the shaft and whose one end is rotatably connected to one end of the shaft, and which is provided so as to be movable in the axial direction substantially parallel to the shaft; a selection push/pull drive member; an arm extending radially outward from the shaft; a connecting rod, one end of which is swingably connected to the arm and substantially perpendicular to the arm; and the selection push/pull. The lever has a first lever rotatably connected to one end of the driving member, and a second lever rotatably connected to one end of the connecting rod, the lever being substantially parallel to the arm and extending the length of the connecting rod from the shaft. A transmission change device having an L-shaped bell crank that is rotatably provided around an axis separated by a distance. 2. The shift push/pull drive member and the select push/pull drive member are each fixed to an inner cable of a push/pull control cable and one end of the inner cable, and are held slidably in the axial direction by a sleeve. 2. A transmission changing device according to claim 1, comprising a cable end rod.