JPS5831711Y2 - Tail cab type automobile transmission remote control device - Google Patents

Description

[Detailed description of the invention] This invention is a tilt-cab type automobile in which the cab is freely tilted and pivoted to the front end of the chassis frame via a tilt hinge. This invention relates to a transmission remote control device that transmits information to a lever.

Generally, in a tilt cab type automobile, an operating lever is attached to either the cab or the chassis frame side.

However, when the operating lever is attached to the chassis frame, it is necessary to provide a large cutout in the cab floor to prevent interference between the operating lever and the cab floor when the cab is tilted.

Furthermore, it becomes necessary to perform treatments such as reinforcement, soundproofing, heatproofing, and dustproofing on the notch in order to avoid deteriorating the driving environment for the driver inside the cab.

For this reason, in tilt cab type vehicles, it is generally advantageous to provide the operating lever on the cab side.

However, when the control lever of the transmission remote control device is installed on the cab side, it is necessary to ensure that the link mechanism that makes up the control device does not interfere with the tilting of the cab. come.

In order to satisfy this condition, conventionally, the center of motion of the link mechanism is placed at or near the center of tilting of the cab.

However, in this case, the force applied to the operating lever must be transmitted in a detour to the vicinity of the tilting center of the cab in front of the lever, and then mechanically transmitted to the gear shift lever.

Therefore, not only does the force transmission efficiency deteriorate due to the clearance between the links or the frictional force between the links, but also the link structure becomes unnecessarily complicated, which tends to cause problems.

In addition, there is also a device in which the link mechanism of the remote control device does not pass through the vicinity of the center of cab tilting.

Instead, the link mechanism is configured such that at least one link is freely telescopic, since the operating lever separates from the transmission when the cab is tilted.

However, in this case, the link mechanism is lifted to the side or upward of the engine room when the cab is tilted, which poses a major problem in engine inspection and maintenance.

In order to eliminate such drawbacks of the conventional technology, the present invention provides a first link mechanism connected to the operating lever on the cab side and a second link mechanism connected to the transmission shift lever on the chassis side. These pair of link mechanisms are connected to interlock the operation lever and the gear shift lever, and when the cab is tilted, the pair of link mechanisms are disconnected, allowing the cab to tilt, and the first link mechanism is locked in the operation lever position when disconnected. The present invention provides a transmission remote control device for a tilt cab type automobile, which is configured to smoothly connect a pair of link mechanisms when the cab returns to a horizontal position.

Embodiments of the transmission remote control device according to the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 2A, in a tilt cab type automobile, a tilt hinge 13 is supported by a bracket 12 fixed to both left and right sides of the front end of a chassis frame 11, and the lower edge of the front end of a cab 14 is rotatably mounted on the tilt hinge 13. It is pivoted on.

The lower surface of the rear end of the cab 14 can be placed on the upper surface of a cab mounting 15 of the chassis frame 11 via a buffer member 16 in the horizontal cab normal position.

When inspecting and servicing the engine, the cab 14 is rotated counterclockwise around the tilt hinge 13 to open the engine compartment 17, as shown in FIG. 2B.

Next, the constituent parts of the transmission remote control device according to the present invention will be explained.

As shown in FIG. 1, the transmission remote control device according to the present invention includes a first link mechanism A mechanism connected to an operating lever 20 disposed in a cab 14, and a second link mechanism connected to a transmission 21. B, a linking means C that connects these two mechanisms in a freely attachable and detachable manner, and a locking means for the first link mechanism A.

As shown in FIGS. 1 and 3, the operating lever 20 has an intermediate tubular portion 20a that rotates around a laterally long support pin 22 and is free to tilt in the longitudinal shift direction XX. A center pin 23 that passes through the tubular portion 20a and the support pin 22 at right angles to the axis of the support pin 22.
The operating lever 2 is pivoted freely around the
0 is free to tilt horizontally, that is, in the select direction YY.

The center pin 23 is attached to the bottom of the cab floor 24 with a bolt 25.
The bolts 23a are inserted into a pair of support brackets 27 extending downward from the support bases 26 defined by the brackets 25 and 25b, and tightened by the brackets 23b, thereby being substantially fixedly supported on the cab floor 24.

The tubular portion 20a of the operating lever 20 is connected to this center pin 2.
A slit 28 through which the number 3 passes is cut long in the circumferential direction on both opposing sides, making it possible for the operating lever 20 to tilt in the X--X direction and its lower end 20b to transmit a shift operation.

The upper boot 29a and the lower boot 29b are placed on the operating lever 20 to prevent external dust from entering the cab from the engine room 17 even though the operating lever 20 penetrates the cab floor 24. It is.

One end of the support pin 22 has a ball 31a forming part of a ball joint 31.

The ball 31a is an end portion that transmits the selection operation of the operating lever 20.

The first link mechanism A is divided into a shift system and a select system, and is linked to the operating lever means of the above configuration.

The shift system first link mechanism consists of two front and rear rods 32, 33A, 33B extending in the longitudinal direction and a lever 34, and the select system first link mechanism consists of a bell crank 35, a rod 36, a crank lever 37, and a lever 34. rod 3
It consists of 8A and 38B.

The front end of the rod 32 is rotatably supported by the lower end 20b of the operating lever, and the rear end is connected to one end of the lever 34 by a ball joint 39.

A select system crank lever 37 (shirt)-40 is substantially rotatably supported on the cab floor 24, and has levers 37a at both ends thereof.

37b is pivoted.

The shift lever 34 has an intermediate portion that is connected to the shaft 4.
It is pivoted to freely rotate around 0.

The front end of the rod 33A is freely connected to the other end of the lever 34 by a ball joint 41, and the other end is freely connected to the front end of the rod 33B via a ball joint 47.

The rear end portion of the rod 33B is supported by freely sliding in the longitudinal direction through a rod guide 43b formed on a support frame 42 fixed to the cab floor 24 and the cab floor 24.

On the other hand, in the select system, pin 4 is attached to the cab floor 24.
A bell crank 35 is rotatably supported via a bell crank 35, and a ball bearing 31b at the front end of the bell crank 35 forms a ball joint 31 together with a ball 31a of the support pin 22, and the other end is rotatably supported at the front end of a rod 36. It is pivoted on.

Lever 37a is freely connected to the rear end of rod 36 by a ball joint 45, and lever 37b is connected to rod 38A.
is freely connected to the front end by a ball joint 46.

The rear end of the rod 38A is freely connected to the front end of the rod 38B via a ball joint 48, and the rear end of the rod 38B is connected to the rod guide 43 of the support frame 42 similarly to the shift system.
a and the cab floor 24 so as to freely slide in the front and rear directions.

The rear end portion of the first link mechanism A is detachably connected to the second link mechanism B by a connecting means C.

This will be explained in detail based on FIGS. 1 to 7.

Now, only the select system will be described, but the same applies to the shift system, so the components of the shift system will be given the same numbers as those of the select system with the suffix b, and the explanation will be omitted.

The upper end of the coupler 51a is pivotally attached to the rod 38B.

The coupler 51a hangs down from the rod 38B, and its lower end opens in a substantially bell mouth shape to form a coupling recess 53.
a, and a cylindrical bushing 5 is formed on the inner wall of the recess 53a.
4a is press-fitted.

(See FIG. 5) On the other hand, a bell crank 56, which is the front end of a second link mechanism of the selection system to be described later, is rotatably supported by a pin 58 at the tip of a bracket 57 extending from the upper end of the cab mounting 15. A ball portion 55 formed at the upper end of the finger 528 fixed to one end of the bell crank 56 by a pole donut 59a.
can be fitted into the coupling recess 53a in a steady state with the cab horizontal.

Cab 14 - Tilt hinge 1 as shown in Figure 2B
When the finger 52a is rotated three times in the counterclockwise direction, the coupling means C, that is, the coupler 51a is disengaged from the finger 52a and can be raised.

As shown in FIG. 4A and FIG. 5, the coupler 51 a
In the fitted state with the finger 52a, the rod 38
Due to the axial movement of B, the coupler 51a is also moved in the front-rear direction, and due to the ball joint mechanism between the coupler 51a and the finger 52a, the finger 528 rotates around the pin 58 together with the bell crank 56, and the second select system Can operate the link mechanism.

In addition, in FIGS. 5 and 6, a pin 60a is implanted at the upper end of the coupler 51a, protrudes laterally outward, and is freely inserted longitudinally into a slit 62a formed at the upper end of the lock lever 61a. It is.

The lower end of the lock lever 61a is rotatably supported by a pin 63a extending inward from both side walls of the support frame 42, and its arc-shaped lower surface forms a tooth surface 64a.

The lock arm 65a, which has a tip claw 66a that can freely engage with the tooth surface 64a, is rotatably supported at its center by a pin 67a extending inward from the side wall of the support frame 42.

The locking arm 65a further includes a lock release arm 68a extending in a direction opposite to the pawl 66a and an upwardly extending arm 69a.

One end of the tension coil spring 70a is locked in a locking hole at the tip of the arm 69a, and the other end of the spring 70a is locked in a pin 71a extending inwardly from the side wall of the support frame 42. The elastic action of the lock arm 65a constantly urges the lock arm 65a around the pin 67a in the direction in which the tip claw 66a engages with the tooth surface 64a of the lock lever 61a, thereby regulating the movement of the rod 38B.

The lower surface of the lock release arm 68a comes into contact with the upper surface of the cab mounting 15 when the cab 14 is in a horizontal steady position, and the lock arm 65a rotates around the pin 67a against the elasticity of the spring 70a, and the tip Claw 66
a and the tooth surface 64a of the lock lever.

The lock lever 61a is connected to the pin 6 by the pin 60a of the coupler 51a, which moves with the axial movement of the rod 38B.
3 It is possible to swing around a.

Therefore, the rotation angle of the lock lever 61a is determined by the axial movement of the rod 38B, and the locking of the lock lever 61a by the lock arm 65a also locks the axial movement of the rod 38B.

In this way, the coupling means C includes the couplers 51a, 51b of the select system and the shift system, and the fingers 52a,
52b, and the locking means mainly consists of lock levers 61a, 61b and a lock arm 65.
a, 65b, and springs 70a, 70b.

Each of the second link mechanisms B includes a shift system and a select system, and the select system includes a rod 7 that connects the bell crank 56 and the select lever 72 of the transmission 21.
3. The shift system is composed of a crank lever 74 and a rod 75, and a shift rod 78, a crank lever 79, and a rod 80 linking the bell crank 76 connected to the shift system finger 52b and the shift lever 77 of the transmission 21. It consists of

The rod 73 extends in the vertical direction, and its upper end is freely connected to the free end of the bell crank 56 via a ball joint 81, and its lower end is freely connected to one end of the crank lever 74 via a ball joint 82.

The rod 75 extends in the horizontal direction, and one end thereof is freely connected to the other end of the crank lever 74 via a ball joint 83, and the other end is freely connected to one end of the select lever 72 via a ball joint 84. be done.

The same applies to the shift system, where the rod 78 is connected to the free end of the bell crank 76 and one end of the crank lever 79, and the rod 80 is connected to the other end of the crank lever 79 and one end of the shift lever 77 through ball joints 85 to 88, respectively. Concatenated.

Although the crankshafts of the crank levers 74 and 79 are not shown, they are substantially rotatably supported by either the chassis frame 11 or the engine, clutch, or transmission 21.

Next, the operation of the transmission remote control device having the above configuration will be explained.

As shown in FIG. 2A, when the cab 14 is in a horizontal steady state, the select system coupler 51a and the finger 52
a and shift coupler 51 b and finger 52
b are in a fitted state.

1st and 4th A. The same applies to Figure 5.6.

In this state, when the operating lever 20 is selectively operated, that is, rotated in the Y-Y direction in FIG. 1, the support pin 22 rotates around the center pin 23 and the bell crank 35 rotates around the pin 44.

The bell crank 35 moves the rod 36 in the front and back direction,
The crank lever 37 is rotated about the shaft 40 to move the rods 38A and 38B in the front and back direction.

At this time, the ball joint 48 is. Even if the front end of the rod 38A slightly moves up and down due to the rotation of the rod 37b, this movement is prevented from being transmitted to the rod 38B.

The longitudinal movement of the rod 38B moves the coupler 51a in the longitudinal direction, causing the finger 522 to swing around the pin 58 via the ball 55a fitted with the coupler 51a.

The swinging motion moves the rod 73 up and down, swings the crank lever 74 around its axis, moves the rod 75 in the axial direction, and rotates the select lever 72.

The rotational movement of the select lever 72 is controlled by the transmission 2.
1, a fork shaft that can be connected to a gear (not shown) to be meshed for transmitting engine power is selected.

Next, operate the operating lever 20 by operating the shaft, that is, X-X in FIG.
When the tubular portion 20 a is rotated in the direction, the support pin 22
The lower end portion 20b of the lever swings back and forth.

The swing moves the rod 32 in its axial direction, rotates the lever 34 around the shaft 40, and moves the rods 33A and 33B.
move in the front-rear axis direction.

This movement moves the coupler 51b in the front-back direction, and the finger 52b that engages the coupler 51b swings around the pin 58.

Therefore, the rod 78 is moved up and down, and the crank lever 7
9 about its axis to move the rod 80 in the longitudinal axial direction, and rotate the shift lever 77 to engage the sleeve fitted with the fork pivoted on the selected fork shaft (not shown). The power is transmitted to the wheels by moving it toward the power gear.

Next, as shown in FIG. 2B, when the cab 14 is tilted for engine inspection and maintenance, the two pairs of select system and shift system couplers 51a, 51b and the finger 5
28.52 b The coupling means C consisting of the coupler 51
a and 51b are lifted together with the cab 14 and separated, and are separated into the first link mechanism A on the cab 14 side and the second link system on the chassis side.

Therefore, since only the rear second link mechanism B from the vicinity of the cab mounting 15 is left behind on the chassis side, the engine room 17 is wide open and does not interfere with inspection and maintenance.

Also, at the same time as the cab is tilted, the lock 1 of the locking mechanism, 'bars 61a, 61b (7) 0'7 release arms 68a, 68b are connected to the cab mounting 1, respectively.
5 apart from each other, coil springs 70a, 70
With the elastic force b, for example, in the select system, the lock arm 65a rotates clockwise around the pin 67a in FIG.
A is engaged with the tooth surface 64a of the lock lever 61a, thereby locking the select system first link mechanism including the rod 38.

Shift system lock arm 65b and lock lever 61b
The same is true for .

Locking by such a locking means has the following effect.

That is, the amount of selection and shift operation of the operating lever 20 when the cab is horizontal displaces the couplers 51a, 51b and fingers 52a, 52b as described above via the first link mechanism of the selection system and shift system.

At this time, a lock l, = bar 61a, is attached around the pins 63a, 63b via the pins 60a, 60b.
, 61 b.

The locking means thus locks the lock levers 61a and 61b at a rotation angle corresponding to the amount of operation of the operating lever 20, and the positions of the couplers 51a and 51b at this time, and thus the operating lever 20 and the first link mechanism A on the cab side. lock.

Therefore, even when the cab is tilted, the state immediately before the cab is tilted is maintained, so when the cab is returned to a horizontal steady state, the separated couplers 51a and 51b are smoothly fitted into the fingers 523 and 52b on the chassis side. There is no such thing as failure.

The substantially bell-mouth shape of the lower ends of the couplers 51 a, 51 b is shaped like the balls of the fingers 55 a, 55 b.
These form guide surfaces that fit into the four coupling parts 53a and 53b, making the fitting even smoother.

When the cab 14 is returned to the horizontal position shown in FIG. 2 again, the lock release arms 68 a , 68 b of the lock arms 65 a , 65 b abut against the upper surface of the cab mounting 15 , and the elasticity of the coil springs 70 a , 70 b is released. The claw 6 at the opposite end rotates counterclockwise against the force.
6 a , 66 b as Rockkurehano tooth surface 64 a ,
64 Release from b to unlock.

After that, shift and selection operations can be freely performed using the operation lever 20 described above.

Although the present invention is as described above, since the center of motion of the link mechanism when the cab is horizontal does not need to be placed at the center of tilting of the cab, the link mechanism is only attached to the rear of the operation lever, and the point of force and the point of application are close to each other and the force is reduced. Transmission efficiency is improved.

Further, since the link that transmits the signal from the operating lever to the vicinity of the center of tilting in front of the lever can be omitted, the link configuration is simplified, and the occurrence of problems is also reduced.

Furthermore, the operating levers can be arranged widely and the individual links can be set short, which improves rigidity and reduces the weight of the entire device.

Although the above embodiment describes a 20-rod system in which the shift system and select system are separated into two systems, the same applies to a single rod system in which the shift system and select system are guided to the vicinity of the transmission using one rod. It is obvious that it can be applied to

Further, the coupling means C and the locking means are not limited to this embodiment, but the scope of the present claims includes modifications that are suitable for the purpose of the present invention.

[Brief explanation of drawings]

Fig. 1 is a perspective explanatory diagram showing a schematic system of a transmission remote control device according to the present invention, Fig. 2 A and B are schematic side views to explain the functions of the device, and A is a stationary state where the cab is horizontal. In position B, the cab is rotated around the tilt hinge and is in a tilted state. FIG. 3 is a longitudinal cross-sectional view showing an embodiment of the operating lever means of the same device, and FIGS. 4A and 4B show an embodiment of the connecting means of the same device; A is a side view; B is a bottom view; Fig. 5 is a partially cutaway side view showing how the first select link mechanism and the second select link mechanism of the device are freely connected and detached, and is taken along the line x-x in Fig. 4B.
' This is a cutaway view taken in the direction of arrows, and the first and second link mechanisms of the shift system are omitted. Figure 6 is a partially cutaway side view showing the locking device of the first link mechanism of the select system of the same device, and is a cross-sectional view taken along the Y-Y' line in Figure 4B, with the shift system mechanism omitted. . FIG. 7 is a rear view showing part of the connecting means and part of the second link mechanism of the device. 11... Chassis frame, 13... Tilt hinge, 14... Cab, 20...
・・Control lever, 21・・Curve transmission, 31・・・・
Ball joint, 32, 33 A, 33 B...
...Rod (first link mechanism shift system), 34...
... Lever 35 ... Bell crank, 36,3
8 A, 38 B... Rod (first link mechanism selection system), 37... Crank lever, 4
0...Shaft, 43a, b...Rod guide, 51a, b...Coupler, 52a,
b...Finger-153a, b...
Coupling recess, 54a, b...button,
56... Bell crank, 61 a, b...
...Lock lever 165a, b...Lock arm, 68a, b...Lock release arm, 7
2...Select lever, 73.75...
・Rod (second link mechanism selection system), 74...
... Crank lever, 76 ... Bell crank,
77...Shift lever-178, 80...
・Rod (second link mechanism shift system), 79...
・Crank lever 81-88...Ball joint.

Claims (6)

[Scope of utility model registration request] (1) In a tilt cab type automobile in which the cab is tiltably supported on a tilt hinge at one end of the chassis frame, an operating lever means disposed in the cab and a first link connected to the lever means are provided. a transmission lever means of a transmission installed on the chassis frame; a second link mechanism connected to the lever means; and a second link mechanism connected to the first link mechanism and the second link mechanism, both of which are connected to the first link mechanism and the second link mechanism. At least a pair of connecting means that are connected when the cab is in a stable horizontal state and separated when the cab is tilted, and a locking means that substantially locks the first link mechanism to the cab when the cab is tilted and releases the lock when the cab is horizontal. and when the connecting means is connected, the operation lever and the speed change lever means are interlocked via a connected first link mechanism and a second link mechanism,
When the cab is tilted, the connecting means is disengaged, the first link mechanism and the second link mechanism are separated, and the cab can be tilted, and the first link mechanism is substantially engaged and locked with the cab. Transmission remote control device. (2) The gear shift lever means consists of two systems consisting of a shift lever and a select lever, and the first link mechanism is a shift system first link mechanism that is connected to the operating lever and transmits the shift operation of the operating lever, and the operating lever a select system first link mechanism connected to the shift lever and transmitting the select operation of the operating lever; a pair of shift system connecting means for freely connecting the two link mechanisms; and the first select system.
and a pair of select system connecting means for freely connecting the second link mechanism, the transmission remote control device according to claim 1, which is a registered utility model. (3) One member of the connecting means is slidably supported on a part of the cab and a bracket fixed thereto, and the upper end is pivoted on the rearmost link of the first link mechanism that is movable in the front and rear direction. The bracket 1 is a ball bearing portion extending inward from the lower end formed in the shape of a bell mouth, and one side is fixed to the cab mounting that supports the rear end of the cab.
Utility model registration claim 1, characterized in that the spherical part is fixed to the upper end of a bell crank of a second link mechanism that is pivotally supported in . 2. The transmission remote control device for a tilt cab type automobile according to item 2. (4) The transmission remote control device according to claim 3, wherein the ball bearing has a cylindrical bush attached to the inner wall of the recess. (5) The locking means includes a lock lever that interlocks with the first link mechanism, and a lock arm that engages with the lock lever when the cab is tilted and separates from the lock lever when the cab is in a horizontal position. - The transmission remote control device according to any one of Items 4 to 4. (6) The lock lever has a slit and a tooth surface that engages with a pin provided on one side of the connecting means fixed to the first link mechanism, and substantially rotates around the pin fixed to the cab. The lock arm is always urged by a spring force in the direction of engaging the tooth surface, and when the cab is horizontal, it comes into contact with the cab mounting and rotates around the fixing pin against the spring force. Claim 5 for utility model registration, characterized in that the lock is released
Transmission remote control device as described in .