JPS6210853B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telescopic link rod used in a transmission control device of a tilt cab type automobile, and more specifically, to a gear shift and select lever. pertains to a telescoping link rod located in the chassis below the floor of the cab to transmit the movement of the rod to the control rod.

Traditionally, the transmission control device used in this type of tail-cab type truck was designed to be fully compatible with the cab suspension, or to transmit information from the transmission to the gear shift and select lever. In order to prevent such vibrations, various displacement absorption mechanisms and vibration absorption mechanisms have been provided, but these displacement absorption mechanisms and vibration absorption mechanisms have become structurally complex.
The efficiency of transmitting the movement of the gear shift and select lever to the shift fork shaft of the transmission was low, and it was difficult to increase the rigidity of the transmission mechanism.

The purpose of this invention is to simplify the mechanism that transmits the movement of the gear shift and select lever to the shift fork shaft of the transmission, reduce rattling, and improve rigidity.・Available to fully accommodate the stroke of the suspension, and gears from the transmission
The tail gear prevents vibration and noise from being transmitted to the shift and select lever, ensuring reliable and smooth transmission gear shifting operations.
The present invention provides a telescope-type link rod used in transmission control devices for cab-type automobiles.

To address these issues, this invention's tailed
The telescopic link rod used in the transmission control device of a cab-type automobile consists of a telescopic main link rod consisting of a plurality of sliding tubes of different diameters connected sequentially in a telescopic manner; The lower end of the main link rod is rotatably connected to one end of the sliding tube located on the outermost side, and the sub link rod is located behind the main link rod, and the main link rod is connected to the main link rod.・Lock the sub link rod to the main link rod when the main link rod is in a predetermined telescopic stroke range;
a sub-link rod locking mechanism that releases the sub-link rod from the main link rod when the main link rod is extended beyond a predetermined telescopic stroke range; The sub-link rod locking mechanism is located at the main link rod.
A slide tube located at the outermost position and a jaw receiver located at one of its sub-link rods, and a slider located at the outermost position in the main link rod, which can be engaged with the jaw receiver. a hook rotatably connected to the other of the motion tube and its sub-link rod; a hook release lever for rotating the hook;
A lock and release cam is arranged in the innermost sliding tube of the main link rod to drive the release lever.

Hereinafter, preferred specific examples of the telescopic link rod used in the transmission control device for a tilt cab type automobile according to the present invention will be described with reference to the drawings.

Figures 1 and 2 show a tenth embodiment of the telescoping link rod of the present invention applied to a transmission control device for a tail-cab type truck.

The telescoping link rod 10 is connected to a telescoping main link rod 11, a sub-link rod 12, and a sub-link rod to accommodate the cab suspension stroke and cab tilt of the cab on the track. It is composed of a link rod locking mechanism 13.

The telescopic main link rod 1
1 denotes three sliding tubes 14, 15, 16 of different diameters that are sequentially connected telescopically, and one end of the sliding tube 14 located at the outermost side of the sliding tubes 14, 15, 16. , that is, the universal joint 17 welded to the lower end and the sliding pipes 14, 15,
16, a universal joint 18 with a cap is welded to the other end, that is, the upper end, of the sliding tube 16 located at the innermost position, and is connected to a bearing (not shown) on the floor of the cab (not shown). A pivoted gear shift and select lever (not shown) has its universal joint 18 at its lower end and a bracket (not shown) located on the chassis frame (not shown) below the cab floor. ) and the sub-link rod 1 connected to the sliding pipe 14.
2. Connect the tip of the control rod (not shown) directly to the control rod (not shown), or connect the tip of the control rod to the select arm (not shown) to lock the sub-link rod. 13 to enable the movement of the gear shift and select lever to be transmitted to the shift fork shaft side of the transmission (not shown) via its control rod.

As understood from FIG. 2, the sliding tube 14 is
At the upper end, a hook protrusion 19 is formed on the inner surface. The hooking protrusion 19 is connected to the sliding tube 14
It consists of an annular stepped portion formed on the inner surface of the Further, the sliding tube 14 has a universal joint 17 welded to its lower end.

The sliding pipes 15 are intermediate sliding pipes, the number of which is determined depending on the height between the cab floor and the chassis frame and the suspension stroke. A hooking protrusion 20 is formed on the inner surface, and a drawer protrusion 21 is formed on the outer surface at the lower end side.

Similar to the hooking projection 19 of the sliding tube 14, the hooking projection 20 is formed on the inner surface of the sliding tube 15 and is configured as an annular stepped portion, and
The drawer protrusion 21 is fitted onto the outer surface of the sliding tube 15, and the sliding tube 1
It consists of a ring welded to 5. Of course, the pull-out protrusion 21 allows the sliding tube 15 to be telescoped, that is, slidably fitted into the sliding tube 14 and pulled out from the sliding tube 14. Hook the hooking protrusion 19.

The sliding pipe 16 has a universal joint 1 with a cap at the upper end.
8 is welded, and a pull-out projection 22 is formed on the outer surface at the lower end side.

Similarly to the drawer projection 21 of the sliding tube 15, the pull-out projection 22 is fitted onto the outer surface of the sliding tube 16, and at a predetermined position is inserted into the ring welded to the sliding tube 16. It is configured. Similarly to the case of the drawer projection 21 of the slide tube 15, the pull-out projection 22 also has its slide tube 16 fitted telescopically, that is, slidably, into the slide tube 15, and its slide When pulled out from the tube 15, the hooking protrusion 20 of the sliding tube 15 is hooked.

When the sliding tube 16 is formed with a narrow outer diameter,
Consists of solid rods.

In this way, those sliding pipes 14, 15, 1
6 are sequentially telescopically connected and expanded and contracted.

The universal joint 17 is configured as a ball joint and allows its threaded portion 23 to be connected to a bracket of the chassis frame.

The capped universal joint 18 is also configured as a capped ball joint, and its threaded portion 2
4 can be connected to the lower end of the gear shift and select lever.

The cap 25 closes the opening at the upper end of the sliding tube 14 when the sliding tubes 15, 16 are retracted.

The sub-link rod 12 connects the control rod to its main link rod 11 and is located behind the main link rod 11 in the longitudinal direction of the truck.

The sub-link rod 12 is connected to the sliding tube 14
a shorter rod 26 and a yoke-type link arm 27 welded to the lower end of the rod 26;
A bearing hole 28 formed on the upper end side of the rod 26
The yoke end of the link arm 27 is pivotally connected to the ball joint 17 via a pin 29, and the yoke end of the link arm 27 is connected to the tip of the control rod via a pin 30 fitted in the bearing hole 28. Alternatively, the rod 26 can be connected to a select arm (not shown) fixed to the tip of the control rod.

The sub link rod locking mechanism 13 is a sub link rod locking mechanism 13.
A jaw receiver 31 is arranged at the upper end of the link rod 12, and a pair of hooks 32 are pivotably connected to a bracket 36 welded to the sliding tube 14 at a predetermined height so as to be able to engage with the jaw receiver 31. , 33, a hook release lever 34 for rotating the hooks 32, 33, and a hook release lever 34 for driving the hook release lever 34.
Sliding tube 16, i.e. ball joint 18
It consists of a lock and release cam 35 located in the cap 25 of the main
When the link rod 11 is in a predetermined telescopic stroke range, that is, in the suspension stroke range L of the cab suspension that suspends the cab of the truck (hereinafter referred to as cab suspension stroke range L), the sub- When the link rod 12 is locked to its main link rod 11 and the main link rod 11 is extended beyond its predetermined telescopic stroke range, i.e. when the cab is moved from the riding position to the tilted position. When tipped beyond its cab suspension stroke range L, its sub link rod 12 is released from its main link rod 11.

The jaw receiver 31 extends horizontally in the lateral direction of the track and is welded to the upper end of the sub-link rod 12, ie, the rod 26.

The pair of hooks 32 and 33 are rotatably connected at their front ends to a pair of arms 37 and 38 of a bracket 36 welded to the slide tube 14 via a pin 39 so as to sandwich the slide tube 14 therein. , a lock jaw 40 is formed at the rear end, and the jaw receiver 31 can be engaged when the cab is in the riding position. Of course, the arms 37, 38 project forward of the sliding tube 14 in the longitudinal direction of the track.

Further, the hooks 37 and 38 have one end fixed to the hook and the other end fixed to the hook release lever 34, respectively, and the locking mechanism is secured by a return spring 41 wound around the pin 39. A force is always applied in the direction of meshing the holder 40 with the retainer 31.

Furthermore, the hooks 32 and 33 form a cam surface 42 at the rear end, and when the cab is returned from the tilted position to the riding position, the cam surface 42 is moved to the rear end by the return spring.
The lock jaw 40 can be guided to the jaw receiver 31 while sliding the lock jaw 40.

The hook release lever 34 is integrally formed at the front end of the hooks 32 and 33 so that it is parallel to the sliding tube 14 and stands up when the cab is in the riding position.
2 and 33 are connected to each other.

The hook release lever 34 has a lock-and-release operating surface 43 at its upper end, and a return spring 41 ensures that the force always directed toward the cap 25 of the main link rod 11, i.e., the ball joint 18. granted,
The cab is tilted from the riding position to the tilted position,
Further, when the vehicle is returned from the tilted position to the riding position, the lock and release operating surface 43 is allowed to come into contact with the lock and release cam 35.

Its lock-and-release operating surface 43 is
In cooperation with the cam 35, a release stroke sufficient to remove the locking jaws 40 of the hooks 32, 33 from the jaw receiver 31 is provided.

In addition, the hook release lever 34 is
When the cab is in the riding position, it has sufficient length to fully escape its cab suspension stroke range L and prevent contact between its lock and release operating surface 43 and its cam 35. There is.

The lock and release cam 35 is located at the lower end side of the cap 25 of the ball joint 18.
At the front, the main link rod 11 is welded to the outer peripheral surface of the cap 25 and comes into contact with the lock-and-release operating surface 43 when the main link rod 11 is extended or contracted beyond the cab suspension stroke range L. , return spring 41
, rotate the hooks 32 and 33 together with the hook release lever 34 around the pin 39 against the
The lock holder 40 can be released from the holder 31.

Next, the operation of the telescopic link rod 10 constructed as described above will be described.
If the cab is now in the riding position, as shown in Fig.
0 is engaged with the jaw receiver 31, and the sub-link
Since the rod 12 is locked to the main link rod 11, the movement of the gear shift and select lever for transmission gear shifting is controlled by the main link rod 11 and the sub link rod. 12, it is transmitted to the control rod, and then to the shift fork shaft of the transmission. In this way, the telescoping link rod 10 allows the movement of the gear shift and select lever to be transmitted reliably and accurately to the control rod.

Further, when the cab is tilted from the riding position to the tilted position, the sliding tube 16 is first pulled out as the cab is tilted, and the cab is tilted from the riding position to the tilted position.
When the suspension stroke range L is exceeded,
The cam 35 is the lock-and-release operating surface 43.
Start contacting. Therefore, the hook release lever 34 resists the return spring 41,
The link rod 10 begins to fall forward around the pin 39, and as the hook release lever 34 rotates, the hooks 32, 33
is started to lift upwards around pin 39. Further, as the cab is tipped, the cam 35 pushes the lock and release operating surface 43 further forward, causing the hook release lever 34 to move further around the pin 39 against the return spring 41. When pushed forward and accompanied by the hook release lever 34, the hooks 32, 33 are further lifted upward around the pin 39, and the lock jaw 40 and the jaw receiver 31 are disengaged.

As a result, the main link rod 11, while pivoted to the gear shift and select lever, is extended progressively and telescopically in response to the tilting movement of the cab. Also, as such, when main link rod 11 is telescopically extended, cam 35 moves away from lock and release operating surface 43.

Conversely, if the cab is returned from the tilted position to the riding position, as the cab descends, the main link rod will also be gradually shortened to the cab suspension stroke range L. As it approaches, the cam 35 begins to contact the lock and release operating surface 43 again, and as the hook release lever 34 begins to move forward,
Lift the hooks 32 and 33 upward to the lock waiting position.

Furthermore, when the cab is returned to the riding position,
Main link rod 11 is also returned to the condition shown in FIG.
33 is rotated downwardly around pin 39 by return spring 41 and locked again.
The jaw 40 is engaged with the jaw receiver 31, the main link rod 11 and the sub link rod 12 are locked again by their hooks 32 and 33, and the link rod 10 is used for gear shift and To ensure and accurately transmit the movement of the select lever to the shift fork shaft of the transmission via the control rod. Therefore, the transmission can be operated to change gears.

FIG. 3 shows another embodiment 50 of the telescoping link rod of the present invention applied to a transmission control device for a tail-cab type truck.

The telescope type link rod 50 is the same as the above-mentioned telescope type link rod 10, but the arrangement of the jaw receiver 31 and the hooks 32, 33 of the sub link rod locking mechanism 13 is changed. Link rod 1
Components corresponding to component 0 are given the same reference numerals.

A sub-link rod locking device 51 in this telescopic link rod 50 is passed between a pair of arms 37 and 38 of the bracket 36, and
At the tips of the arms 37 and 38, a jaw support 31 is arranged extending horizontally in the lateral direction of the track,
Further, hooks 32 and 33 are rotatably connected to the upper end of the sub-link rod 12 via a pin 39. Of course, the hooks 32 and 33 each form a locking jaw 40 at their front end, allowing the jaw receiver 31 to engage when the cab is in the riding position. The hooks 32 and 33 also have a sliding pipe 1 at the rear end of the sliding pipe 14 when the cab is in the riding position.
A hook release lever 52 is integrally formed so as to be parallel to 4 and also to stand up, and connects the hooks 32 and 33 to each other.

The hook release lever 52 has a lock-and-release operating surface 53 at its upper end, and a return spring 41 ensures that the force always directed toward the cap 25 of the main link rod 11, i.e., the ball joint 18. granted,
The cab is tilted from the riding position to the tilted position,
Further, when the vehicle is returned from the tilted position to the riding position, the lock and release operating surface 53 is allowed to come into contact with the lock and release cam 35.

Its lock-and-release operating surface 53 is
In cooperation with the cam 35, a release stroke sufficient to disengage the locking jaws 40 of the hooks 32, 33 from the jaw receiver 31 is provided.

In addition, the hook release lever 52 is
When the cab is in the riding position, the cab has sufficient length to fully escape the cab suspension stroke range L and prevent contact between its lock and release operating surface 53 and its cam 35. There is.

The lock and release cam 35 is located at the lower end side of the cap 25 of the ball joint 18.
At the rear, it is welded to the outer peripheral surface of the cap 25 and comes into contact with the lock and release operating surface 53 when the main link rod 11 is expanded or contracted beyond the cab suspension stroke range L. , return spring 41
, rotate the hooks 32 and 33 together with the hook release lever 52 around the pin 39 against the
The lock holder 40 can be released from the holder 31.

The sub-link rod locking mechanism 51 configured in this manner is also operated in the same manner as the sub-link rod locking mechanism 13 in the telescopic link rod 10 described above, and the main link rod locking mechanism 51 is operated in the same manner as the sub-link rod locking mechanism 13 in the telescopic link rod 10 described above. Lock the sub link rod 12 to the link rod 11 and release the sub link rod from its main link rod 11.

According to the above invention, the link rod connected between the gear shift and select lever and the control rod is sequentially connected telescopically to a plurality of sliding tubes having different diameters. It consists of a telescopic main link rod and a sub-link rod located behind the main link rod and rotatably connected to the lower end of the main link rod. A locking mechanism for the link rod is provided on the main link rod with the outermost sliding tube and its sub-links.
The main link rod can be rotated to the outermost sliding tube and the other of its sub-link rods by engaging the jaw receiver located on one side of the rod. A connected hook, a hook release lever for rotating the hook, and a main motor for driving the hook release lever.
The link rod consists of a lock-and-release cam located in the innermost slide tube, which reduces the cab-tailing action compared to devices previously proposed and used. The reliability of the locking and releasing operations of the locking mechanism accompanying the cab-tilt return operation and the reliability of the operation of returning to the lock waiting position are improved.
For transmission control devices, the movement of the gear shift and select lever is controlled by the transmission shift fork.
The mechanism that transmits the transmission to the shaft has been extremely simplified, rattling has been reduced, and rigidity has been improved.Furthermore, it has become possible to fully correspond to the stroke of the cab suspension, and the gear transmission from the drive system and other parts has been made possible.
Vibration and noise transmitted to the shift and select lever are absorbed and alleviated by the telescopic telescoping action of its link rod, and in addition, transmission gear shifting operations are accurate and
It is done reliably and smoothly.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a specific example of the telescopic link rod of the present invention applied to a transmission control device for a tail-cab type truck, and FIG. 1
The exploded sectional view of the telescoping link rod shown in the figure, and FIG. FIG. 2 is a partially cutaway side view. 10,50...Telescope type link rod,
11...Telescope type main link rod,
12...Sub link rod, 13,51...Sub link rod locking mechanism, 14,15,16
...Sliding pipe, 17,18...Universal joint, 19,20...
Hook protrusion, 21, 22...Drawer protrusion, 25...Cap, 26...Rod, 27...Yoke type link.
Arm, 31...Jewel holder, 32, 33...Hook, 34, 52...Hook release lever, 3
5...Lock and release cam, 40...Lock position, 41...Return spring, 4
3,53...Lock and release operation surface.

Claims (1)

[Scope of Claims] 1. A telescopic main link rod consisting of a plurality of sliding tubes with different diameters that are sequentially connected in a telescopic manner, and a sliding tube located at the outermost side of the main link rod. A sub-link rod whose lower end is rotatably connected to one end of the moving pipe and is located behind the main link rod, and a sub-link rod which is placed on the main link rod and whose main link rod is Locks its sub-link rod to its main link rod when it is within a predetermined telescoping stroke range, and when that main link rod is extended beyond its predetermined telescoping stroke range, its sub-link rod a sub-link rod locking mechanism for releasing the rod from its main link rod, the sub-link rod locking mechanism being the outermost sliding member of the main link rod; A sliding tube and its sub-link rod are arranged on one side of the tube and its sub-link rod, and the sliding tube and its sub-link rod are arranged on the outermost side of the main link rod so as to be able to engage with the tube. a hook rotatably connected to the other of the rods; a hook release lever for rotating the hook; and a hook located on the innermost side of the main link rod for driving the hook release lever. A telescopic link rod used in a transmission control device for a tilted cab type automobile, characterized by comprising a lock and release cam disposed in a sliding tube.