JPS6231659B2 - - Google Patents

Abstract

PURPOSE:To simplify the arrangement of a gear shift control mechanism and to aim at enhancing the controllability thereof, by directly transmitting the select and shift operations of a shift lever to the remote control cables of two systems with a spherical bearing for the spherical bearing being used as a fulcrum point. CONSTITUTION:The select operation of a geared transmission is carried out by performing a shift lever in the direction of the arrow X from its neutral position. That is, when the shift lever 6 is tilted to, for example, the right, the front end of a shaft 8 is pushed up, and therefore, a bellcrank 19 is rotated counterclockwise about a supporting shaft 22, resulting in that a cable 16 is pushed back rightward (rearward), thereby the control rod of the geared transmission is actuated. Meanwhile, in order to shift the transmission to a predetermined shift position, the shift lever 6 is performed in the direction of the arrow Y. That is, when the lever 6 is tilted to, for example, the front (right), the lower end 21 thereof is moved rearward (rightward), and therefore, a cable 14 is pushed back for allowing the control rod to be actuated, thereby the gears are meshed in a predetermined shift position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a speed change operation mechanism for a gear transmission that is primarily disposed on the floor of a vehicle.

[Prior Art] In the speed change operation mechanism disclosed in Japanese Utility Model Publication No. 42-5211, the horizontal shaft extending laterally from the speed change lever and the end of the bell crank are simply connected by a ball-and-socket joint. When the horizontal axis is tilted sideways in response to left and right tilting of the gear shift lever, the end of the horizontal axis traces an arc-shaped trajectory, and a force that twists this is applied to the bell crank, ensuring smooth movement. hinder. In addition, if the mounting position of the horizontal shaft is off the center of the spherical bearing of the gear shift lever, the end of the horizontal shaft will move slightly back and forth and up and down as the gear shift lever tilts back and forth, causing severe damage to the bell crank. Unreasonable movements occur.

[Problems to be Solved by the Invention] An object of the present invention is to provide a gear transmission in which there is no unreasonable movement in the connection between the horizontal shaft and the bell crank, and an error in the mounting position of the horizontal shaft with respect to the gear shift lever is tolerated. The object of the present invention is to provide a speed change operation mechanism.

[Means for Solving the Problems] In order to achieve the above object, the configuration of the present invention includes a ball joint at the tip of a horizontal shaft extending laterally from a spherical bearing portion of a gear shift lever tiltably supported by a bracket. The sliding blocks are connected to each other, and the sliding blocks are slidably engaged with a guide frame extending in the front-rear direction provided at the end of a bell crank rotatably supported on the side wall of the bracket.

[Function] The end of the horizontal shaft 8 traces an arcuate trajectory in response to the left and right tilting of the gear shift lever 6. In contrast, the sliding block 9 moves inside the guide frame 10 as the bell crank 1 moves.
Since the bell crank 19 moves parallel to the support shaft 22 of the bell crank 19, no unreasonable force is applied to the arm of the bell crank 19 to twist it, resulting in smooth operation.

Furthermore, if the mounting position of the horizontal shaft 8 relative to the gear shift lever 6 is off from the center of the spherical bearing 31, the end of the horizontal shaft 8 will move in the front and back direction as the gear shift lever 6 tilts back and forth. Since the sliding block 9 slides in the longitudinal direction inside the guide frame 10, the rotational displacement exerted on the horizontal shaft 8 by the bell crank 19 is very small and does not affect the speed change operation.

[Embodiments of the Invention] As shown in FIG. 1, the speed change operation mechanism according to the present invention includes a base plate 20 fixed to the vehicle body side with bolts inserted into four bolt insertion holes 17, and a base plate 20 fixed to the vehicle body side by welding or the like to the base plate 20. A bracket 7 made of a plate bent into an inverted U-shaped cross section to be joined, and this bracket 7
It consists of a gear shift lever 6 which has a spherical bearing on its upper surface and is supported so as to be tiltable back and forth and left and right, and a bell crank 19 which is supported pivotally on the side wall 2 of the bracket 7.

Openings 2a are provided in both side walls 2 of the bracket 7 to reduce weight. The upper wall 27 of the bracket 7 is provided with a spherical seat as described later, and a hemispherical portion connected to the gear shift lever 6 is engaged with the spherical seat, and the presser plate 4 is fixed to the upper wall 27 from above and supported. be done. A horizontal shaft 8 extending laterally from the hemispherical portion is connected to the speed change lever 6, and a sliding block 9 is connected to this end via a ball joint. That is, a sliding block 9 made of a low-friction material is engaged with the spherical end of the horizontal shaft 8, and this sliding block 9 is slidably engaged with a guide frame 10 that is elongated in the front-rear direction.

This guide frame 10 is fixedly supported at one end of a bell crank 19. The middle portion of the bell crank 19 is rotatably supported on the side wall 2 of the bracket 7 with a shaft 22, and one arm is attached to the upper wall 27 of the bracket 7.
The arm extends horizontally, almost parallel to the arm, and the other arm extends downward. A first remote control cable (more specifically, an inner cable) 16 is connected to the arm extending downward by a pin 18. This remote control cable 16 is connected to a wall portion 1 that projects upward from the board surface of the board 20.
Outer cable 1 is locked to 2 by locking member 15
6a and is connected to a known control rod located in a gear transmission (not shown).

A second remote control cable 14 (more specifically, an inner cable) is connected to a lower end portion 21 of the speed change lever 6 that projects downward from the hemispherical portion by a pin 30 . This remote control cable 14 passes through an outer cable 14a that is locked to the wall portion 12 by a locking member 13, and is connected to the aforementioned control rod.

As shown in FIG. 2, the top wall 27 of the bracket 7
An opening 36 is provided in the opening 36, and a hemispherical spherical seat 32 is connected to the lower surface of the ceiling wall 27 so as to surround the opening 36.
A hemisphere 31 is slidably engaged in this interior.
The sleeve 3 fitted into the center of the hemisphere 31
The gear shift lever 6 is inserted into the gear shift lever 7.
A horizontal axis 8 that crosses the hemisphere 31 and the hemisphere 31 connects the two. A cover 5 is supported on the upper surface of the ceiling wall 27 by a presser plate 4, and a spring 33 surrounding the gear shift lever 6 is interposed between the cover 5 and the hemisphere 31, so that the hemisphere 31 is attached to the spherical seat 32. Forced engagement.

The horizontal shaft 8 projects outwardly through an opening 35 in the side wall 2 of the bracket 7. A sliding block 9 having a spherical cavity is slidably connected to the tip spherical portion 34 of the horizontal shaft 8. As described above, the sliding block 9 is slidably supported along the guide frame 10 connected to the bell crank 19.

Next, the operation of the speed change operation mechanism according to the present invention will be explained. First, the selection operation of the gear transmission is achieved by operating from the neutral position shown in FIG. 1 in the direction of the arrow x. For example, shift lever 6
When tilted to the left, the tip of the horizontal shaft 8 is pushed up, the bell crank 19 is rotated counterclockwise around the support shaft 22, the cable 16 is pushed back to the right (backward), and the gear transmission is Activate the located control rod.

Conversely, when the shift lever 6 is tilted to the left or right, the bell crank 19 is rotated clockwise about the support shaft 22, and the cable 16 is pulled leftward (forward).

Next, when shifting to a predetermined gear,
Move the gear shift lever 6 in the direction of the arrow y, for example, forward (left).
When pushed down, the lower end 21 of the gear shift lever 6 moves rearward (to the right), pushing the cable 14 back and operating the control rod located in the gear transmission, causing the gears to mesh to a predetermined gear. . At this time, since the horizontal shaft 8 is arranged at the center of the hemisphere 31, the horizontal shaft 8 rotates about this axis in response to the operation of the shift lever 6 in the direction of the arrow y, and the tip ball portion 34 moves into the guide frame. Sliding contact is made at the engaging portion with 10. Even if the mounting position of the horizontal shaft 8 is offset from the center of curvature of the hemisphere 31, the sliding block 9 only slightly slides back and forth with respect to the guide frame 10, and the bell crank 19
hardly rotates.

Conversely, when the shift lever 6 is pushed backwards (to the right), the lower end portion 21 moves forward and the cable 14 is pulled.

In the above embodiment, it goes without saying that the end 21 of the speed change lever 6 can be used to select the gear transmission, and the bell crank 19 can be used to perform the shift operation.

[Effects of the Invention] As described above, the present invention connects the sliding block via a ball joint to the tip of the horizontal shaft extending laterally from the spherical bearing portion of the gear shift lever tiltably supported by the bracket. Since the sliding block is slidably engaged with a guide frame extending in the front-rear direction provided at the end of the bell crank which is rotatably supported on the side wall of the bracket, the gear lever remains horizontal with respect to left and right tilting. In response to the arcuate movement of the shaft, the sliding block slides in a direction perpendicular to the longitudinal direction of the groove in the guide frame of the bellcrank, and therefore an unreasonable force is applied to the bellcrank that twists it. Smooth operation can be obtained without any problems. In addition, even if the mounting position of the horizontal shaft is offset from the center of the spherical bearing of the gear shift lever, the sliding block connected to the end of the horizontal shaft will move in the longitudinal direction of the groove of the guide frame against the tilting of the gear shift lever in the longitudinal direction. Since the bell crank slides smoothly, the movement is easy and the rotational movement exerted on the bell crank is minimal, thereby absorbing manufacturing errors.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a gear shift operation mechanism of a gear transmission according to the present invention, and FIG. 2 is a front sectional view thereof. 2: Side wall, 6: Gear shift lever, 7: Bracket,
8: Horizontal axis, 9: Sliding block, 10: Guide frame,
14, 16: remote control cable, 19: bell crank, 20: board, 21: lower end, 31: hemisphere, 32: spherical seat, 34: spherical part.

Claims (1)

[Claims] 1. A bell crank, which is rotatably supported on the side wall of the bracket, with a sliding block connected via a ball joint to the tip of a horizontal shaft extending laterally from a spherical bearing of a gear shift lever tiltably supported on the bracket. A speed change operation mechanism for a gear transmission, characterized in that the sliding block is slidably engaged with a guide frame extending in the front-rear direction provided at an end of the gear transmission.