JPS625948Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a remote control device for a transmission of a tail-cab type automobile.

In a tail-cab type automobile, it is necessary to releasably connect a shift lever mounted on the floor of the cab and a shift select rod leading to a transmission via a ball bearing. For this purpose, conventionally, the lower end of the shift lever and the front end of the shift select rod have been connected via a coupling.

However, in the past, the shift actuation point and the select actuation point were located at the same portion of the lower end of the shift lever, so the lever ratios in the shift direction and the select direction of the shift lever were the same. For this reason, when the number of gears increases, for example, 6 forward speeds and 1 reverse speed, there is a possibility that the desired speed change operation cannot be performed unless the shift lever is operated to select a large amount. On the other hand, if the lever ratio of the shift lever is made small and the select operation amount is set to a level that provides good operability, the amount of operation in the shift direction becomes too small, and the shift operation force increases, resulting in poor shift lever operability. There are aggravating drawbacks.

This invention was made in view of the above, and
The object of this invention is to improve the operability of the shift lever even in a multi-stage transmission by changing the lever ratio between the shift direction and the select direction even though the shift lever is the same.

The present invention will be described in detail below based on an illustrated embodiment.

A shift lever 3 is inserted and held through a ball bearing 2 through a floor 1 of a cab which is tiltably mounted on a frame (not shown). A bracket 5 is welded and fixed to the upper surface of the front end of a shift select rod 4 leading to a transmission (not shown), and a connector 7 is pivotally connected to the bracket 5 via a pin 6 extending along the axial direction of the rod 4.

A pair of left and right select plates 8, 8, which are substantially parallel to the axial direction of the shift select rod 4, are fixed to approximately the center of the connector 7, and above the select plates 8, 8, a shift select rod is fixed. A pair of front and rear shift plates 9, 9, which are substantially orthogonal to the axial direction of 4, are fixed. Then, by inserting and fitting the lower end of the shift lever 3 between the shift plates 9, 9 and between the select plates 8, 8 from above in a freely engaging and detachable manner, both plates 8, 8, 9, 9
The lower end of the shift lever 3 and the front end of the shift select rod 4 are removably engaged with each other via a connector 7 having a connector 7. 10 is a spring that elastically holds the connector 7 in an upright state, 11 is a shift knob attached to the upper end of the shift lever 3, and 12 is a first engagement that forms a contact portion between the shift plates 9, 9 and the shift lever 3. part, 13 is the select plate 8,
8 and the shift lever 3, and the shift select rod 4 is supported so as to be rotatable and movable in the axial direction as in the conventional case.

In the above configuration, when the shift lever 3 is operated to shift, the lever 3 is operated to swing in the left-right direction in FIG. 1 about the ball bearing 2. When the shift lever 3 is shifted in this way, the first engaging portion 12 formed on the lever 3 and the shift plates 9, 9
Since the connector 7 reciprocates in the left-right direction in FIG. 1 due to the engagement with the bracket 5, the shift select rod 4 is controlled to slide in the axial direction, that is, in the shift direction. Incidentally, during such a shift operation, the second engaging portion 13 formed at the lower end of the shift lever 3 only slides between the select plates 8, 8 in the front-rear direction.

Further, when the shift lever 3 is operated to select, the shift lever 3 is operated to swing in the left-right direction in FIG. 2 about the ball bearing 2. Then, the second engaging portion 1
3 and the select plates 8, 8, the coupling member 7 reciprocates in the left-right direction in FIG. For this purpose, a pressing force is applied to the bracket 5 in the left-right direction through the pin 6, so that the shift select rod 4 reciprocates in the left-right direction to select and operate a transmission (not shown). Note that during such a selection operation, the first engaging portion 12 slides between the shift plates 9 in the left-right direction, so the shift select rod 4 does not move in the shift direction (axial direction). .

On the other hand, when the cab is tipped up, the shift lever 3 moves upward.
Then, the first and second engaging portions 12, 13 engage between the shift plates 9, 9 and the select plates 8, 8.
Since the connector 7 is pulled out from the gap, the connector 7 is held vertically by the tension of the spring 10. Therefore, when the cab is tilted down, the engaging parts 12, 13 at the lower end of the shift lever 3 can be inserted and fitted between the shift plates 9, 9 and between the select plates 8, 8 without requiring any special positioning operation. Can be combined.

Further, when the shift lever 3 is operated as described above, the first engagement portion 12 of the lever 3 becomes the point of action, and when the shift lever 3 is operated, the second engagement portion 13 becomes the point of action. Therefore, since the lever ratio during select operation can be made smaller than the lever ratio during shift operation,
Even if the amount of operation in the selection direction is made small, the amount of movement (rotation angle) of the shift select rod 4 in the selection direction can be made sufficiently large. For this reason, even if the number of select gears becomes large, such as 6 forward gears and 1 reverse gear, the select operation amount can be reduced without causing the amount of shift operation of the shift lever 3 to be too small, and the operability of the shift lever 3 can be improved. You can improve.

In the embodiment, the coupling device is held upright by a spring when the shift lever is disengaged due to tail-up of the cab, but it is not necessarily necessary to provide a spring.
The connector may be held upright by rotational resistance between the bracket and the connector. Further, in the embodiment, the upper ends of the shift plate and the select plate are respectively inclined outward in order to improve the positioning of the shift lever and the coupling device when the cab is tilted down, but this is not necessarily limited to the embodiment. In addition, the shape of the engaging portion can be changed as necessary. Furthermore, in the embodiment, the select plate is disposed below the shift plate to increase the lever ratio on the select side, but depending on the shift pattern, the vertical relationship between the shift plate and the select plate may be reversed, or ,
The lever ratio may be changed by changing the distance between the two.

As explained above, according to the present invention, while using the same shift lever, the point of action of the lever during shifting and the point of action of the lever during selection are separated to obtain independent lever ratios. Therefore, the shift operation amount and select operation amount of the shift lever installed in the cab can be maintained at the optimum value without making any special changes to the interlocking part between the shift select rod and the transmission, which is subject to space constraints. . For this reason, there is no need to secure a large space for operation around the shift lever as in the past, so the space inside the cab can be used effectively and the operability of the shift lever can be improved. In addition, by increasing the vertical width of each plate, the relative movement between the shift lever and the connector due to the relative vertical movement between the cab and frame can be absorbed by the sliding movement of both, allowing the cab to fully float. A transmission with excellent operability, reliability, and durability, with no risk of the remote control device of the transmission becoming inadvertently disengaged even if the transmission is changed, and no risk of excessive stress being applied to the shift select rod, etc. remote control device can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of a main part showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. 1... Floor, 2... Ball bearing, 3... Shift lever, 4... Shift select rod, 5... Bracket, 6... Pin, 7... Connector, 8... Select plate, 9... Shift plate, 12...
1st engaging part, 13...2nd engaging part.

Claims (1)

[Scope of utility model registration request] In a tail cab type automobile, in which the lower end of a shift lever attached to the cab and the front end of a shift select rod leading to a transmission are removably connected via a ball bearing, a bracket is fixed to the front end of the shift select rod. A connector is pivotally connected to the bracket via a pin extending in the axial direction of the shift select rod, and a pair of front and rear shift plates substantially perpendicular to the axial direction of the shift select rod are connected to the bracket via a pin extending in the axial direction of the shift select rod. A pair of parallel left and right select plates are vertically separated and fixed to a connecting tool, and the lower end of the shift lever is removably inserted and fitted from above between the shift plates and the select plate. A remote control device for tail cab type automobile transmissions.