JPH03194267A - Transmission operating device - Google Patents

Abstract

PURPOSE:To impede a select rod from being displaced from its preset position due to its own weight and vibration of a vehicle by providing a turn-stop means between a shift rod, which is turned by each select position, and the housing of an operating device. CONSTITUTION:Since a select rod 5 on a select operation side orthogonally intersecting with the axial line of a shift rod 7 in an operating device 21, mounted to an upper surface, is tilted at an angle theta from a horizontal surface II-II, a turn-stop mechanism 22 is provided between the side of the shift rod 7, associated with a select position, and a housing 16 so as to prevent the select rod 5 from being displaced from the preset select position of the rod 5 due to its own weight and vibration of a vehicle, in a transmission 10 mounted to a rear part of the large vehicle. This turn-stop mechanism 22 prevents a turn by providing grooves 23, 24 in a shift lever 13 in a side of the shift rod 7 and mounting stop members 25, 26, formed of a leaf spring having a width, to a side of the housing to fit the stop member to any of the grooves 23, 24. Thus, the select rod can be prevented from being displaced from its preset position.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a transmission operating device that is attached to a vehicle such as a city bus as the floors become lower. In particular, the present invention relates to a transmission operating device that is attached to a vehicle such as a city bus that is installed at an angle from a horizontal plane. related to things.

b. Conventional technology Traditionally, in city buses and trucks with large transmissions, operating devices with actuators, etc. are attached to the transmission, allowing smooth selection and shift operations with light force. ing. In the transmission operating device and electronically controlled automatic transmission that remotely control the transmission of such a vehicle using an actuator or the like,
A gear position sensor is provided to check the gear position of the transmission and to control the actuator and the like.

FIG. 5 shows an explanatory diagram of a conventional transmission operating device, in which two contact or non-contact type gear position sensors 2 and 3 are used (in this figure, A contact sensor is shown for clarity). One gear position sensor 2 is disposed near the end of the select rod 5 of the select actuator 4, and the other gear position sensor 3 is disposed near the end of the shift rod 7 of the shift actuator 6. Each gear position sensor 2゜3 has three limit switches 2a, 2b, 2c and 3
a.

3b, 3c, and when the selector, cutrosod 5, or shift rod 7 moves to a predetermined position by operating the change lever 8, the limit switches 2a, 2b, 2c, and 3
a, 3b, 3c is pressed by the flange-like ends 5a, 7a of the rod 5.7 to turn on, this signal is input to the controller 9, and the transmission 10 moves the change lever 8. It is designed to be operated according to its position. Note that TI [is an air tank, MVll, MVb.

! 'IVc, MV, solenoid valve, PL, display device, sp
is an abnormality alarm.

Now, in the same figure, the operation of the actuators 4 and 6 is as follows.
The selection actuator 4 will be briefly explained as an example.

The actuator 4 includes a power piston 5h slidably disposed within the cylinder 4a, and the power piston 5.
It consists of a pair of auxiliary pistons 5c and 5d arranged on both sides of the piston. Note that the power piston 5b shown in the same figure
The position is the neutral position.

The power piston 5b is integrated into the select rod 5, but the pair of auxiliary pistons 5c and 5d are connected to the cylinder 4.
It is slidably fitted between the inner circumferential surface of the power piston 5a and the outer circumferential surface of the power piston 5b. When compressed air is supplied and discharged to and from the pair of pressure chambers 11a and llb formed on both sides of the power piston 5b via the solenoid valves MV, MV, the power screw 5b is moved by the arrow a by this pressure. It is designed to slide in the direction indicated by the arrow.

When the select rod 5 slides as described above by the select operation of the change lever 8, the select lever 12 directly connected to the rod 5 moves to the right (direction a) or to the left (direction a) in FIG. b direction) and is fixed to the shift rod 7.
a, 14 of the shift forks 14 of the transmission 10,
, 14□, I43.

A positioning mechanism 15 is provided at the other end 5e of the select rod 5, and the shift lever 13 is connected to the shift fork 14. ．． Determine the position to connect to either 14□ or 143. This positioning mechanism 15 is biased toward the wand 5 by a plurality of hemispherical holes 15a provided on the other end 5e side of the select rod 5 and a spring 15b from the housing 16 side of the operating device 1. It consists of a ball 15c.

Regarding the shift rod door side, a conventional positioning mechanism similar to the conventional one is usually provided on the transmission side.

C1 Problems to be Solved by the Invention By the way, the above-mentioned transmission with an operating device is often combined with a large engine and installed at the rear of a large vehicle such as a city bus, as shown in FIG.

In the figure, 1 is the transmission operating device, 10 is the transmission, 17 is the bus, 18 is the engine, 19 is the driver's seat,
Elements that are the same as those in FIG. 5 are given the same reference numerals and their explanations will be omitted. In recent years, as city buses have become larger, the engines have also become larger, so the floor surface at the rear of the passenger compartment of the city bus inevitably has to be higher than the floor surface at the front. Therefore, in order to lower the floor of the city bus, it is necessary to install the so-called power plant including the engine, transmission, etc. at an angle. For this reason, the transmission operating device 1 is also mounted tilted.

However, when the operation device 1 completes the selection or shift operation, the compressed air of the actuator 4.6 is exhausted from the pressure chambers 11a and 11b.

In this case, the shift direction does not deviate from the set position (operation completion position) due to the weight of the shift rod or vehicle vibration due to the mechanism of the transmission, but there is a problem in that the select direction deviates from the set position.

That is, in the selection direction, at least the end 13a of the shift lever 13 of the operating device 1 as shown in FIG.
The select rod 5 moves by an amount of play λ due to assembly with another shift fork of the transmission 10, for example 143. When the select rod 5 moves, it is pressed by the flange-shaped end 5a of the rod 5, and the limit switch of the gear position sensor 2, which is turned ON, is turned OFF, and the display device PL disappears and displays an incorrect message. However, the operating device 1 has a problem in that the controller 9 is forced to perform repeated correction operations (operation of returning to the set position), resulting in a shortened lifespan.

On the other hand, if the positioning mechanism 15 is provided at the other end 5e of the select rod 5, the bearing portion of the rod 5 must be extended by that amount. For this reason, the operating device 1 becomes long in the direction of the rod 5, and there are problems in terms of space, such as contacting the floor when tilted and mounted on a vehicle.

The present invention has been made in view of the above, and its purpose is to solve the above-mentioned problems.As the floors of large vehicles, especially city buses, become lower, the operating device is tilted, especially the select rod is tilted from the horizontal plane. It is an object of the present invention to provide a transmission operating device in which the rod does not easily shift from a set position even when attached, due to its own weight or vibrations when the vehicle is running.

d. Means for Solving the Problems The present invention has a structure in which a solenoid valve is actuated by an electric signal system to supply and discharge compressed air, thereby driving a speed change operating rod. In a machine operating device, when a select rod that is perpendicular to the axis of the shift rod of the operating device is installed at an angle from the horizontal plane, the select rod should not be deviated from its set position due to its own weight or vibrations of the vehicle. The present invention is characterized in that a rotation preventing means is provided between the shift rod side, which is interlocked with the select rod, that is, rotates depending on the select position, and the housing side of the operating device.

e. Function: The transmission operating device configured as described above is provided with one or more grooves along the axis of the shift rod as the rotation stopping mechanism, and a groove of the shift rod is provided on the housing side. A stop member biased toward the center and having a width along the axis is fitted into or fitted into one of the grooves to prevent rotation of the shift rod.

f. Examples Hereinafter, preferred embodiments of the present invention will be described in detail by way of example based on the drawings.

Figures 1 to 3 (A) and 3 (B) show an embodiment of the transmission operating device of the present invention, and Figure 1 shows the device mounted on the upper surface of a transmission directly connected to the engine. 2 is an enlarged sectional view of the main parts of the select operation side of this device in FIG. FIG. In this figure, the same members as those in FIGS. 5 to 7 are designated by the same reference numerals, and their explanations will be omitted.

In Figure 1, due to the lower floor of vehicles such as city buses,
Centering on the main shaft 10a of the transmission 1110, the power plant, that is, the engine 18 and the entire transmission 10, are tilted by an angle θ from the vertical axis 1-1.

Now, assuming that the height of the engine 18 from the center of the transmission main shaft 10a is [■]], the height of the engine 1B is lowered by H (1-cos θ) due to the inclination of the power plant.

Therefore, the operating device 2 mounted on the upper surface of the transmission 10
The select rod 5 on the select operation side, which is perpendicular to the axis of the first shift rod 7, is inclined at an angle θ from the horizontal plane ■−■. Therefore, in order to prevent the select rod 5 from shifting from the operated position, that is, the set select position, due to its own weight or vibrations while the vehicle is running, there is a rotation stopper mechanism on the shift rod 7 side that is interlocked with the select position. 22 is provided.

In FIG. 2, the rotation prevention mechanism 22 includes two grooves 23 and 24 provided along the axis of the shift I lever 13 fixed to the shift rod 7 on the circumferential surface thereof, and an operating device housing. 16 mounting plates 16a and axially wide leaf spring members 25 and 26 biased toward the center of the shift rod 7. When the shift lever 13 is connected to the shift forks 14 + and 14 □, the tips of the leaf spring members 25 and 26 fit into the right ends 23 a and 24 a of the grooves 23 and 24 in the figure, respectively. ing. Note that the shift lever 13 is connected to the shift fork 14. When connected to the select rod 5, the rotation stopper mechanism 22 is omitted because the select rod 5 will not be further displaced due to its internal stopper mechanism.

3(8), FIG. 2 and FIG. 3(B), the shift lever 13 is connected to the shift forks 141, 14□, 143.
The rotation stop mechanism 22 when connected to the grooves 23, 24 and the leaf spring members 25, 2, respectively.
6 shows the relative position.

In this embodiment, the grooves 23 and 24 are provided on the peripheral surface of the shift lever 13, but the grooves 23 and 24 are provided on the peripheral surface of the shift lever 13.
By fixing the shift lever 13 in the rotating direction, the peripheral surface of the shift rod door may be used, and the leaf spring member 25 may be fixed.
．． The mounting position of 26 may be shifted along the axis of the shift rod 7.

FIG. 4 shows another embodiment of the present invention, in which the rotation stopping mechanism 30 of the shift rod 7 is the m23.
and a stop member 33, 34 which is biased toward the center of the shift rod door by a spring 32 from the operating device housing 16 side and has a hemispherical tip, and its function is the same as in the previous embodiment. .

According to the second embodiment, the rotation stopping mechanism for the shift rod 7 can be easily provided without expanding the installation space.

It should be noted that the technology of the present invention is not limited to the technology in the above-mentioned embodiments, and means of other modes that perform the same function may be used, and the technology of the present invention can be modified in various ways within the scope of the above-mentioned configuration. It is possible to add.

g. Effects of the Invention As is clear from the above description, according to the transmission operating device of the present invention, a rotation preventing means is provided between the shift rod that rotates depending on each select position and the housing of the operating device. Even if the select rod, which is orthogonal to the axis of the shift rod of the operating device, is arranged at an angle from the horizontal plane, the select rod will not easily shift from its set position due to its own weight or vibrations of the vehicle. do not have.

Therefore, there will be no erroneous display on the display device, and the operation device will not be forced to perform repeated correction operations by the controller due to the shift of the select rod, so that its original lifespan can be maintained.

Furthermore, it is possible to promote lower floors of large vehicles, especially city buses.

Furthermore, the rotation stopper can be added without changing the size of the conventional device, and in terms of space, the device of the present invention can be mounted on a vehicle.

[Brief explanation of drawings]

Figures 1 to 3 (A) and 3 (B) show an embodiment of the transmission operating device of the present invention, and Figure 1 shows the device mounted on the upper surface of a transmission directly connected to the engine. 2 is an enlarged sectional view of the main parts of the select operation side of this device in FIG. 4 is a sectional view of the main part of the select operation side of this device showing another embodiment of the present invention, FIG. 5 is an explanatory diagram of a conventional transmission operating device, and FIG. FIG. 7 is a sectional view of the main parts of the conventional device on the selection operation side, and is a layout diagram when the conventional device is installed on a bus. 1.21... Transmission operating device, 5... Select rod, 7... Shift rod, 16... Housing, 16a... Mounting plate, 22.30... Rotation stop mechanism, 25 .26... Leaf spring member, 33.34... Stopping member. 23.24...Groove, 31,. 32...Spring,

Claims (1)

[Scope of Claims] 1) A transmission operating device in which a solenoid valve is actuated by an electric signal system to supply and discharge compressed air to drive a shift operating rod, in which: On the other hand, when orthogonal select rods are arranged inclined from the horizontal plane, in order to prevent the select rod from shifting from the set position due to its own weight or vibration of the vehicle, the shift rod side that rotates according to the select position and the above-mentioned operation are required. A transmission operating device characterized in that a rotation preventing means is provided between the device and a housing side. 2) The rotation stopper is provided with one or more grooves along the axis of the shift rod, and a stop member biased toward the center of the shift rod is inserted into the groove on the housing side. The transmission operating device according to claim (1), which is adapted to be fitted into any one of the following.