JPS6215557Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a gear shift operation mechanism for gear transmissions such as automobiles, which remotely changes the gear position of the transmission by selecting and shifting the gear lever. be.

[Conventional technology]

This type of remotely operated transmission mechanism
As shown in the figure, the control shaft 12, which is axially slidably and rotatably supported on the transmission case wall 39, is selected in the axial direction to shift the shift rods 7, 8, and 9 arranged parallel to each other. The shift lever 10 is engaged with one of the blocks 4, 5, 6, and one of the shift rods 7, 8, 9 is shifted in the axial direction by rotation of the control shaft 12.
It is designed to obtain gear meshing at a predetermined gear position. The control shaft 12 is reciprocally driven by a remote control cable 13 latched to this end, and is also rotated reciprocally by a remote control cable 3 latched to the lever 2.

The shift pattern of this type of transmission, in the case of five forward speeds, has three select positions, as shown in Figure 2, and two of these select positions are selected from the first forward speed. A fourth gear is arranged, and a fifth forward gear and a reverse gear are arranged at the remaining select positions. Therefore, when attempting to downshift from 5th gear to another gear while the vehicle is running,
When returning the gear shift lever from 5th gear to the neutral position, you may unintentionally overshift to reverse gear R. In this case, the gears may be damaged due to noise, or sudden braking force may be applied due to reversing gears. , very dangerous.

The device disclosed in Japanese Patent Application Laid-Open No. 48-64627 has the advantage that the gear shift lever can be mounted in a location where there is not much room because the device is flat.
The mechanism that holds the cam member in the neutral position tends to be somewhat unstable.

[Problem that the invention attempts to solve]

Therefore, the purpose of the present invention is to improve the shift operation mechanism for remotely operating the shift mechanism from the driver's seat, as shown in Figure 1, to prevent misshifts from a predetermined gear to reverse gear. It is an object of the present invention to provide a gear change operation mechanism for a gear transmission.

[Means to solve the problem]

In order to achieve the above object, the structure of the present invention is such that a protrusion that protrudes from the neutral position toward the predetermined gear position is provided on the bottom wall of the case within the shift operation path between the predetermined gear position and reverse gear of the gear change lever. The shaft is disposed at the end of the gear shift lever so as to be tiltable within a predetermined range, and is normally protruded downward by a spring. However, for the return operation to the neutral position, a control member is provided which abuts against the protrusion and prevents the protrusion from overstepping.

[Effect]

The control member 25, which is axially supported by the gear shift lever, can freely tilt in one direction, but its tilting range in the other direction is limited. The control member 25 passes over the protrusion 26 in the moving path, but when returned to the neutral position, the control member 25 hits the protrusion 26, preventing the gear shift lever from moving too far (misshifting to the reverse gear).

The engagement between the control member 25 and the protrusion 26 is released when the gear shift lever is selected to another gear stage.

[Example of idea]

As shown in FIGS. 3 and 4, the ball portion 21 provided at the intermediate portion of the gear shift lever 22 is supported by a known spherical seat provided on the vehicle body side so as to be able to swing back and forth and left and right, and this operation will be described later. Two systems of remote control cables cause the control shaft 12 shown in FIG. 1 to move in the axial direction and rotate.

As shown in FIG. 3, the lower end of the speed change lever 22 is flat and has a groove 40 formed therein, in which a control member 25 is rotatably supported with a pin 23. A spring 28 is wound around the pin 23, and is locked at one end to the shift lever 22 and at the other end to the control member 25. In the free state of the spring 28, the control member 25 moves as shown by the solid line in FIG. It is set in a position that protrudes downward. and,
A protrusion 26 is disposed on the case bottom wall 27 within the fifth speed/reverse shift path of the gear change lever 22, being biased toward the fifth speed side from the neutral position.

A remote control cable 3 is coupled to the pin 23 in order to transmit a shift operation of the speed change lever 22 . Further, in order to transmit the selection operation of the gear shift lever 22, an arm 31 is connected to the ball portion 21, and one end of the lever 29 is connected to this end portion with a pin 32. The lever 29 has its central portion facing the support shaft 3 toward the vehicle body.
0 and is rotatably supported, and the other end is locked to the remote control cable 13.

Next, the operation of the device of the present invention will be explained. When shifting to the fifth gear, the shift lever 22 is moved from the neutral position shown by the solid line in FIG.
When the lower end of the lever 29 is tilted to the left, the lever 29
0, the control shaft 12 shown in FIG. 1 moves to the left, and the shift lever 10 is selected into the groove of the shift block 4. Here, when the lower end of the gear change lever 22 is shifted to the right in FIG. 4, the gear is shifted to the fifth gear. In this case, the control member 25 hits the protrusion 26,
It climbs over the protrusion 26 while leaning to the left against the spring 28. The position indicated by the broken line 24A in FIG. 4 is the shift position to the fifth gear.

When downshifting from the fifth gear, the lower end of the gear shift lever 22 is returned to the left in FIG. 4, but if the shift lever 22 attempts to go beyond the neutral position at this time, the control member 25 hits the protrusion 26. In this case, the control member 25 resists the force of the spring 28 and the fourth
In the figure, the gear shift lever 22 rotates counterclockwise.
It hits the stop wall 24a and cannot get over the protrusion 26. In this way, a misshift to the reverse gear due to the shift lever 22 being moved too far is prevented.

From this state, the shift lever 22 can be selected to the neutral position N (FIG. 2). That is,
When the spring 28 is returned to the neutral position shown by the solid line in FIG.
The force causes the control member 25 to rotate and move away from the stop wall 24a, as shown by the solid line in FIG. Therefore, from this neutral position N, the position 5 shown in FIG.
When the reverse gear is selected, the control member 25 is positioned on the reverse gear side of the protrusion 26, so if the lower end of the gear shift lever 22 is shifted to the left in FIG. 4, the gear is shifted to the reverse gear. Ru.

The protrusion 26 acts as a stopper to prevent the shift lever 22 from moving too far from the fifth gear to the reverse gear, and the control member 25 rides over the protrusion 26 when shifting to the fifth gear. When shifting down from a gear, the gear hits the protrusion 26 and serves to prevent the gear from shifting too far into the reverse gear.

[Effect of idea]

As described above, the present invention includes a control member that is rotatable within a predetermined range at the lower end of the gear shift lever, and a protrusion that engages with the control member is arranged in the shift path between a predetermined gear and a reverse gear. Because it is a thing,
The structure is simple, the operation is reliable, and the fifth
It is possible to prevent a misshift from a gear to a reverse gear, and eliminate the problem described at the beginning.

In this invention, the control member is axially supported at the end of the gear shift lever so that it can tilt within a predetermined range, so that the engagement with and overcoming of the protrusion on the bottom wall of the case is smooth and reliable, and the control member is attached downward. Excellent durability as no unreasonable force is applied to the spring.

[Brief explanation of the drawing]

FIG. 1 is a side cross-sectional view of a remotely operated gear shift operation mechanism that is integrated with a transmission;
FIG. 2 is an explanatory diagram of the operation of the device, FIG. 3 is a front view of the speed change operation mechanism according to the present invention, and FIG. 4 is a left side view of the same. 3, 13: remote control cable, 4-6: shift block, 7-9: shift rod, 22: gear shift lever, 23: pin, 25: control member, 26: protrusion, 27: case bottom wall, 28: spring.

Claims (1)

[Scope of utility model registration request] A protrusion that projects from the neutral position toward the predetermined gear is arranged in the shift operation path between the predetermined gear and reverse gear of the gear shift lever on the bottom wall of the case. It is supported by a shaft so that it can tilt within a range, and is usually projected downward by a spring, and it tilts and overcomes the protrusion in response to a shift operation to a predetermined gear stage, but it does not respond to an operation to return to a neutral position. A speed change operation mechanism for a gear transmission, comprising a control member that comes into contact with the protrusion to prevent overshooting.