JP3911050B2 - Transmission speed change device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronically controlled transmission operating device for a transmission.
[0002]
[Prior art]
In order to realize a simple gear shifting operation of a vehicle, an air cylinder (actuator) that performs gear shifting of a transmission is provided, and a gear is optimally electronically controlled by a microcomputer (Japanese Utility Model Publication No. 6-37232). . In such a transmission, a backup circuit is formed in the air circuit of the air cylinder in order to ensure a shifting operation in the event of a failure, such as gear shift control by a microcomputer. A magnet valve is provided to operate.
[0003]
[Problems to be solved by the invention]
However, there is a problem that the actuator cannot be backed up due to the failure of the actuator, and the increase in the number of gears that can be operated in an emergency is minimized because the structure of the gear shifting operation switch and the magnet valve is complicated and the cost is significantly increased. There was a problem that had to be restricted.
[0004]
An object of the present invention is to solve such problems.
[0005]
[Means for Solving the Problems]
In the first invention, when a select actuator that drives the select lever of the transmission, a shift actuator that also drives the shift lever, and a shift request based on the running state of the vehicle or a shift request based on an artificial operation in the cab, In order to shift the gear to the required position, a controller for controlling the selection actuator and the drive of the shift actuator, and for transmitting the manual shift selection operation and shift operation from the cab to the transmission selection lever and shift lever via the linkage. In a shift operation device comprising a mechanical shift operation mechanism and means for stopping the gear shift control of the controller when switching to a mechanical manual shift, a select operation and a shift operation of the mechanical shift operation mechanism Each transmission path is separated into a linkage part on the cab side and a linkage part on the transmission side, and a lever interlocking with the linkage part on the cab side and a lever interlocking with the linkage part on the transmission side are provided between them. Means are provided for connecting the levers when switching to mechanical manual transmission.
[0006]
In the second invention, as a connecting means between the levers in the first invention, a pin that can be advanced and retracted in one of the cab side lever and the transmission side lever, and an engagement hole in which the pin can be inserted in the other are provided. There are provided a lock actuator for moving the pin forward and backward in the insertion direction with respect to the engagement hole, and means for controlling the lock actuator so that the pin is inserted into the engagement hole only at the time of switching to mechanical manual transmission.
[0007]
In 3rd invention, the plane which faces the pin of the lever with the engagement hole in 2nd invention is formed in the area which covers the relative displacement range of the engagement hole with respect to a pin.
[0008]
[Action]
According to the first aspect of the present invention, when the controller is normally performing the gear shift control of the transmission via the shift actuator and the select actuator, the mechanical speed change operation mechanism is connected to each transmission when the connecting means between the levers is removed. The linkage portion on the cab side of the route is separated from the linkage portion on the transmission side, and it is possible to avoid the linkage on the cab side following the shift actuator and the select actuator. Also, when switching to mechanical manual shift, the gear shift control of the controller is stopped, and the shift actuator and select actuator are in a free state. Manual shifting like a car is possible.
[0009]
According to the second aspect of the invention, the connecting means between the levers is not manual, but when the lock actuator is activated when switching to mechanical manual transmission, the pin is inserted into the engagement hole at a predetermined position. The linkage part and the linkage part on the transmission side can be automatically converted to the interlocked state.
[0010]
According to the third aspect of the invention, even when the pin and the engagement hole between the levers do not coincide with each other at the time of switching to the mechanical manual transmission, the pin hits the lever by the operation of the lock actuator. When the mechanism is moved, the pin can be inserted into the engagement hole at a predetermined position between the levers.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1, the main drive shaft 2 of the transmission 1 is connected to the engine side via a clutch housing 3. A main shaft (not shown) of the transmission 1 protrudes to the opposite side of the engine, and a propeller shaft (not shown) is connected to the protruding portion.
[0012]
A shift actuator 4 and a select actuator 5 are disposed in the transmission 1. The shift actuator 4 is connected to one end of the lever 6 via a link rod 7, and further connected to the input shaft of the power shift device 9 from the other end of the lever 6 via a link rod 8. The select actuator 5 is connected to a select lever 10 of the transmission 1 via a link rod 11.
[0013]
As a mechanical manual transmission mechanism for transmitting manual shift select operation and shift operation from the cab to the select lever 10 and shift lever (not shown) of the transmission 1, linkage 12a on the cab side is provided for each transmission path. 13a and transmission-side link rods 12b and 13b, and lever mechanisms 15 and 16 are interposed between them.
[0014]
In the lever mechanism 15 on the shift side, a shaft 17 is rotatably supported on the vehicle body side, and an integral lever 18 and a rotatable lever 19 are provided on the outer periphery of the shaft 17. A cab side linkage 12a is connected to the lever 18, and a known power shift device 9 is connected to the lever 19 via a link rod 12b. As a means for connecting the levers 18 and 19, a pin that can be advanced and retracted via a support 20 formed on the outer periphery of the shaft 17 (on the lever 18 side) is provided, and the pin is inserted into the lever 22 integral with the lever 19. Possible engagement holes 23 are formed.
[0015]
As shown in FIGS. 2 and 3, the shaft 17 is formed of a hollow pipe and is supported by ball joints 24a and 24b on the vehicle body side via bushes 17a and 17b at both ends. A sleeve 19a that can freely rotate on the shaft 17 is provided, and levers 19 and 22 are formed on the outer periphery of the sleeve 19a. A spring 26 that urges the pin 25 in the backward direction to remove the pin 25 from the engagement hole 23 is housed in the support body 20, and operates when switching to mechanical manual transmission to insert the pin 25 into the engagement hole 23. Is provided.
[0016]
The lever mechanism 16 on the select side has a shaft 31 attached to the bracket 30 on the transmission 1 side, and levers 32 and 33 are rotatably supported on the outer periphery of the shaft 31. The cab side linkage 13a is connected to the lever 32, and the select lever 10 of the transmission 1 is connected to the lever 33 via the link rod 13b. As a means for connecting between the levers 32 and 33, a pin 35 that can be advanced and retracted via a support 34 formed on the lever 32 is provided, and an engagement that allows the pin 35 to be inserted into a lever 37 that is integral with the lever 33. A hole 36 is formed.
[0017]
As shown in FIG. 4, sleeves 32 a and 33 a that are rotatable on a fixed shaft 31 are provided on the bracket 30, the lever 32 is formed on the outer periphery of the sleeve 32 a, and the levers 33 and 37 are disposed on the outer periphery of the sleeve 33 a, respectively. Is formed. A return spring 39 that urges the pin 35 in the backward direction to remove the pin 35 from the engagement hole 36 is accommodated in the support body 34 and operates when switching to a mechanical manual shift to insert the pin 35 into the engagement hole 36. 40 is provided.
[0018]
In FIG. 1, when a shift request based on the running state of the vehicle (vehicle speed, engine load, etc.) or a shift request based on a manual operation in the driver's cab occurs, the controller 50 selects the select actuator 5 to shift the transmission 1 to the required position. And the drive of the shift actuator 4 is controlled.
[0019]
Means (not shown) for generating a request for switching to mechanical manual shifting is provided, and when the controller 50 receives the switching request, it stops normal gear shift control. Further, the lock actuators 27 and 40 of the lever mechanisms 15 and 16 receive the pins 25 and 35 between the levers 18 and 19 and between the levers 32 and 33 in the engagement holes 23 and 36 when a request for switching to manual shifting occurs. It is supposed to be inserted.
[0020]
As the lock actuators 27 and 40, a fluid pressure drive type as shown in FIG. 5 or an electromagnetic force drive type as shown in FIG. 6 is adopted. In FIG. 5, when fluid pressure (for example, air pressure) is supplied to the cylinder 60 through the pipe 62, the piston portion 61 formed in a part of the pins 25 and 35 causes the pins 25 and 35 to engage with the engagement holes 23 and 35. When the fluid pressure in the cylinder 60 is released through the pipe 62 while pushing out to the 36 side, the piston 61 is pushed back to the initial position by the springs 26 and 39. In FIG. 6, when the solenoid coil 63 is energized, the plunger 64 pushes the pins 25 and 35 toward the engagement holes 23 and 36 by the exciting force, while when the solenoid coil 63 is deenergized, the plunger 64 is moved to the spring 26. , 39 is pushed back to the initial position.
[0021]
When a request for switching to mechanical manual shift is not generated, the shift actuator 4 and the select actuator 5 are driven based on the gear shift control of the controller 50. The driving force of the shift actuator 4 is transmitted from the link rod 7 to the lever 6, and is further input from the lever 6 to the power shift device 9 via the link rod 8, and the shift lever (not shown) of the transmission 1 is operated by the output. Let The driving force of the select actuator 5 is transmitted to the select lever 10 via the link rod 11.
[0022]
Between the levers 18 and 19 and between the levers 32 and 33, the pins 25 and 35 are retracted and the connection with the engagement holes 23 and 36 is released. Therefore, even if the shift actuator 4 and the select actuator 5 are operated, These driving forces are not transmitted to the linkages 12a and 13a on the cab side. That is, the linkages 12a and 13a are maintained in a stopped state.
[0023]
At the time of failure of automatic shift based on the control of the controller 50, if a request for switching to mechanical manual shift is generated, the gear shift control of the controller 50 is stopped and the lock actuators 27, 40 of the lever mechanisms 15, 16 are operated. . The shift actuator 4 and the select actuator 5 are in a free state, and the lock actuators 27 and 40 insert the pins 25 and 35 into the engagement holes 23 and 36 to perform the connecting operation between the levers 18 and 19 and between the levers 32 and 33. Start.
[0024]
The levers 22 and 37 are arranged as shown in FIG. 7 when the relative positions of the pins 25 and 35 and the engaging holes 23 and 36 between the levers 18 and 19 and between the levers 32 and 33 are shifted depending on the gear position of the transmission 1. When the pins 25, 35 and the engagement holes 23, 36 do not coincide when switching to mechanical manual shifting, the fan 25 is formed in a fan shape that covers the displacement range A (dotted area) of the pins 25, 35. However, when the pins 25 and 35 are pushed against the levers 22 and 37 by being pushed by the lock actuators 27 and 40 and the levers 18 and 32 are moved from the cab, the pins 25 and 35 are inserted into the engagement holes 23 and 36. The connection operation is completed.
[0025]
At the time of this manual shift, when a mechanical shift operation mechanism is operated in the driver's cab, the select operation is transmitted from the linkage 13a to the lever 32, via the pin 35, and further from the lever 33 through the link rod 13b to the select lever 10 of the transmission 1. Is input. The shift operation is transmitted from the linkage 12a to the lever 18, and is further input to the power shift device 9 from the lever 19 via the link rod 12b via the pin 25, and the shift lever of the transmission 1 is operated by the output.
[0026]
As described above, the shift linkage 12a and the select linkage 13a operate only at the time of switching to the mechanical manual shift, and the shift actuator 4 side and the select actuator 5 side are normally operated even when a gear shift based on the control of the controller 50 is performed. Since they are separated from each other and do not operate together with them, it is possible to avoid the occurrence of sliding sounds and impact sounds of the linkages 12a and 13a.
[0027]
Since the linkages 12a and 13a are not subjected to the driving force of the actuators 4 and 5 and are not very frequently used, they do not require a high degree of durability. The linkages of conventional manual vehicles are further reduced in weight and used. It becomes possible. For the actuators 4 and 5, the linkages 12a and 13a do not become a load, so that the same capacity as the conventional one can be used. In addition, as a means for connecting between the levers 18 and 19 and between the levers 32 and 33, it may be manually connected and released using a fastener such as a bolt and nut.
[0028]
【The invention's effect】
According to the first aspect of the present invention, a select actuator that drives the select lever of the transmission, a shift actuator that also drives the shift lever, and a shift request based on the driving state of the vehicle or a shift request based on human operation in the driver's cab are generated Then, in order to shift the transmission to the required position, the selection actuator and the controller for controlling the drive of the shift actuator are transmitted to the transmission select lever and the shift lever from the cab via the linkage, and the manual shift selection operation and the shift operation are transmitted. A shift operation device comprising a mechanical shift operation mechanism for switching and a means for stopping gear shift control of a controller when switching to a mechanical manual shift, and a select operation and a shift of the mechanical shift operation mechanism Each transmission path is separated into a linkage part on the cab side and a linkage part on the transmission side, and a lever linked to the linkage part on the cab side and a lever linked to the linkage part on the transmission side between them. Since there is a means for connecting the levers when switching to mechanical manual shift, the gear shift control of the controller is stopped when switching to mechanical manual shift. If the connecting means between the levers is operated, manual shifting equivalent to a manual vehicle becomes possible. In other words, it is possible to cope with the occurrence of a failure of the controller or the like with a mechanical manual shift, and the driver does not need a special operation in an emergency and can secure a high degree of reliability.
[0029]
According to the second aspect of the present invention, the connecting means between the levers is provided with a pin that can be advanced and retracted on one of the lever on the cab side and the lever on the transmission side, and an engagement hole into which the pin can be inserted on the other side. Since there is a lock actuator that moves forward and backward in the insertion direction with respect to the engagement hole and means for controlling the lock actuator so that the pin is inserted into the engagement hole only when switching to mechanical manual transmission, switching to mechanical manual transmission Sometimes, when the lock actuator is actuated, the pin is inserted into the engagement hole at a predetermined position, so that the linkage portion on the cab side and the linkage portion on the transmission side can be automatically converted into an interlocked state.
[0030]
According to the third invention, the plane facing the pin of the lever having the engagement hole in the second invention is formed to have a width that covers the relative displacement range of the engagement hole with respect to the pin. Even when the pin between the lever and the engagement hole do not match when switching to, the pin hits the guide surface by being pushed by the lock actuator, so if you move the mechanical speed change mechanism from the cab, A pin can be inserted into the engagement hole.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.
FIG. 2 is a partially cutaway plan view of the lever mechanism on the shift side.
FIG. 3 is a front view of the lever mechanism on the shift side.
FIG. 4 is a partially cutaway front view of the lever mechanism on the select side.
FIG. 5 is a cross-sectional view of the lock actuator.
FIG. 6 is a cross-sectional view of the lock actuator.
FIG. 7 is a perspective view of the lever.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Transmission 4 Shift actuator 5 Select actuator 9 Power shift apparatus 10 Select lever 12a Linkage 12b Link rod 13a Linkage 13b Link rod 15, 16 Lever mechanism 17, 31 Lever shaft 18, 19, 22, 37, 32, 33 Lever 23, 36 Engagement hole 25, 35 Pin 26, 39 Spring 27, 40 Lock actuator 50 Controller

Claims (3)

When a shift actuator that drives the select lever of the transmission, a shift actuator that also drives the shift lever, and a shift request based on the running state of the vehicle or a shift operation based on human operation in the cab, the transmission is gear-shifted to the required position. Therefore, a controller for controlling the drive of the select actuator and the shift actuator, and a mechanical shift operation mechanism for transmitting the manual shift select operation and the shift operation from the cab to the transmission select lever and shift lever via the linkage, And a means for stopping the gear shift control of the controller at the time of switching to the mechanical manual shift, each transmission path for the select operation and the shift operation of the mechanical shift operation mechanism is provided. Separately, the linkage part on the cab side and the linkage part on the transmission side are separated, and a lever linked to the linkage part on the cab side and a lever linked to the linkage part on the transmission side are provided between them. A transmission gear shifting operation device comprising means for connecting the levers when switching to gear shifting. As a connecting means between the levers, a pin that can be advanced and retracted on either the cab side lever or the transmission side lever, and an engaging hole into which the pin can be inserted are provided on the other side. The shift operating device according to claim 1, further comprising a lock actuator for controlling the lock actuator so that the pin is inserted into the engagement hole only when switching to the mechanical manual shift. The speed change operation device according to claim 2, wherein the plane facing the pin of the lever having the engagement hole is formed to have a width that covers a relative displacement range of the engagement hole with respect to the pin.

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