JPS6121300Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a transmission control device used in a tail-cab type automobile.

Conventionally, large trucks, crane trucks, and various large-sized transport vehicles, etc. have had their cabs installed in low positions, close to the road surface, in consideration of visibility from the driver. The structure is designed to minimize blind spots caused by accidents and ensure safe driving.

When installing the cab in a low position like this,
It is necessary to position the cab floor as low as possible, and for this purpose a conventional construction is used, namely a shift section attached to one end of the control rod by a yoke at the lower end of the change lever. With a structure in which the lever is directly operated, a considerable amount of space is required between the chassis and the cab floor, making it difficult to position the cab floor downward.

Also, especially if the cab is a tailed type,
The cab side where the change lever is attached,
Since the control rod and shift selection lever are attached to the chassis side, the structure is such that they are separated when tilted, so the space necessary for this structure is provided between the cab floor and the chassis. Therefore, it tended to be extremely difficult to position the cab floor downward.

The purpose of this invention was to lower the cab floor and allow the driver's seat to be placed at a lower position without complicating the structure. To provide a transmission control device used in a tail cab type automobile, which can surely connect a change lever on the side and a shift selection lever on the chassis side.

With these issues in mind, the transmission control device used in the tail-cab type vehicle of this invention has a bearing placed on the cab floor in the front position, and a transmission control device that penetrates through the bearing. A change lever is fitted and held in a change lever, an idle lever is swingably attached to the back of the cab floor at a position rearward of the change lever, and an idle lever is rotatably attached to the lower end of the idle lever. The sub-change lever is fixed to the control rod located on the seat side below the cab. A shift selection lever connected to the sub-change lever, a connecting ball attached to one of the lower end of the sub-change lever and the upper end of the shift selection lever, and a connecting ball that receives the connecting ball when the cab is in normal condition. A flared socket is attached to the lower end of the sub-change lever and the upper end of the shift selection lever, and a flared socket is disposed on the chassis side of the shift selection lever so as to release the connection ball when the cab is in the tilted state. , control rod shift
The device includes a lift device that lifts the selection lever side above the chassis and elastically holds it.

Hereinafter, preferred specific examples of the transmission control device for use in a tail-cab type automobile according to this invention will be described with reference to the drawings.

1 to 3 show a tenth example in which the transmission control device of this invention for use in a tail-cab type automobile is applied to a cab-over type truck.

The transmission control device 10 used in this tail-cab type automobile is fitted into a bearing 11 disposed on a cab floor 60 and passing through the bearing 11 at the front position. The change lever 13 is held together, and the idle lever 21 is swingably attached to the back surface of the cab floor 60 at a position rearward of the change lever 13 and its bearing 11. A sub-change lever 24 that can be mounted, and an interlocking rod 1 that connects the lower end of the change lever 13 and the upper end of the sub-change lever 24.
4, a shift selection lever 32 fixedly connected to a control rod 31 disposed on the side of the chassis 61 below the cab, and a lower end of the sub-change lever 24 and its shift selection lever - A connecting ball 30 attached to one of the upper ends of the lever 32;
Accept the connected ball 30 in the normal condition of the cab,
And, when the cab is tilted, the connected ball 3
Just as you remove 0, the sub change lever 2
4 and the other of the upper ends of its shift selection lever 32; A lift device 80 that lifts and elastically holds the chassis 61 above.
It is composed of

That is, the cab floor 60 is positioned low so that the front thereof is as close to the seat 61 as possible, and the rear thereof is a seat (not shown).
and is arranged at an angle so as to form a space necessary for operating the shift selection lever 32 on the inside thereof, and the rear side to which the change lever 13 is attached, and the shift selection lever 32 It is connected to the space formed on the side through a small gap.

The bearing 11 is fitted with a housing 15 that is fitted into the cab floor 60 with an opening at a lower forward position, and a ball seat 17 that is fitted into the bearing bore 16 of the housing 15.
Therefore, the bearing bore 16 has a lower inner circumferential surface formed into a spherical surface, and the ball seat 17 also has inner and outer circumferential surfaces formed of partially spherical surfaces.

The change lever 13 passes through the bearing 11 and has its lower end extending slightly below the cab floor 60 to form a barrel portion 18 for being fitted and held in the bearing 11, and further has a lower end extending slightly below the cab floor 60. A clevis 12 is screwed to and fixed with a nut 19.

The barrel portion 18 has a spherical outer peripheral surface to enable rotational movement relative to the bearing 11;
When fitted into the bearing bore 16, that is, the ball seat 17, it is stopped by a snap spring (not shown) through a washer (not shown) so as to be retained within the ball seat 17. ing.

Of course, this barrel part 18 is the cab floor 6.
A vertical groove (not shown) is formed on the outer circumferential surface for a set screw (not shown) for regulating the attachment position to zero.

A substantially T-shaped idle lever 21 is rotatably attached to the upper end of the cab floor 60 at a position rearward of the bearing 11 with a bracket 20, and the lower end of the idle lever 21 is rotatably attached to the lower end of the idle lever 21. The upper end of a sub-change lever 24 having a flared socket 23 at its lower end is connected by a ball joint.

Changes placed at intervals like that
The lever 13 and the sub-change lever 24 are configured such that one end of the interlocking rod 14 is connected to the clevis 12 provided at the lower end of the change lever 13 with the bolt 7.
0 and nut 71, and connect the other end of this interlocking rod 14 to the sub-change lever 24.
The upper end is connected to a portion connected to the lower end of the idle lever 21 by a ball joint, so that the operating force applied to the change lever 13 is transmitted to the sub change lever 24.

The shift selection lever 32 has a connecting ball 30 at its upper end and is welded to a control rod 31 at its lower end.

The connecting ball 30 provided at the upper end of the shift selection lever 32 is fitted into the flare type socket 23 provided on the sub-change lever 24 when the cab is in the normal state, and when the cab is in the tilted state. , its flare type socket 23
It is placed so that it deviates from the

Also, this shift selection lever 32
The control rod 31 that is attached to the
One of them is held by a lift device 80, and the other is connected to a transmission (not shown) via an equalizer bar (not shown).

The lift device 80 lifts the chassis 6 during driving.
1 and the flare type socket 2 of the sub-change lever 24 under the vibration of the cab etc.
3 and the connection ball 30 of its shift selection lever 32 are maintained in a fitted state,
Change lever 1 on the cab floor 60 side
3, the operating force applied to the shaft 61 is shifted and
It enables reliable transmission to the selection lever 32, and includes a chassis side bracket 81, a lift arm 82, a hook arm 83 welded upward from approximately the center of the lift arm 82, and a ball seat 84 at the lower end. Lift rod with 8
5, a ball portion 86 attached to the control rod 31, and a spring 87.

That is, the chassis side bracket 8 is attached to the chassis 61.
1 is fixed, one end of a lift arm 82 is attached to this bracket 81 by a pin 88, and the other end of this lift arm 82 is
The upper end of a lift rod 85 with a ball seat 84 at its lower end is attached by a pin 89, while the control rod 31 is fitted with a ball portion 84.
The control rod 31 is connected to the ball seat 84 of the lift rod 85 by a ball joint so that the ball portion 86 of the control rod 31 is accommodated therein.

The hook welded to this lift arm 82
Hook one end of the spring 87 to the tip of the arm 83, attach the other end of the spring 87 to the chassis 61 side, and lift the lift arm 8 around the pin 88 attached to the chassis side bracket 81.
2 and holds the control rod 31 via the lift rod 85.

Of course, when this cab is tilted, the connecting ball 30 of the shift selection lever 32 attached to the control rod 31
The sub-change lever 24, which includes the change lever 13, the interlocking rod 14, the idle lever 21 and the flared socket 23, is detached from the flared socket 23 provided on the sub-change lever 24.・Floor 6
They are placed on the back side of 0 and are tailed together.

Since the transmission control device 10 is configured in this way, the cab is normally
That is, when the change lever 13 is operated in the lowered state, the operating force applied to the change lever 13 is reliably transmitted to the sub change lever 24 via the interlocking rod 14, and the flare type socket 23 and the shift lever are - communicated to the transmission (not shown) via the selection lever 32 and control rod 31, as well as an equalizer bar (not shown).

According to this invention, the cab side and chassis side link mechanisms, which are connected to each other when the cab is in a normal state and are separated from each other when the cab is tilted, are placed on the cab floor in a forward position. The bearing is fitted with a chain bearing that passes through the bearing and is held by the bearing.
At the position behind the lever and its bearing,
An idle lever that is swingably attached to the back of the cab floor, a sub-change lever that is rotatably attached to the lower end of the idle lever, and a sub-change lever that is rotatably attached to the lower end of the idle lever. - An interlocking rod that connects the upper end of the lever, a shift selection lever that is fixedly connected to a control rod located on the chassis side below the cab, and a lower end of the sub-change lever and its The connecting ball attached to one of the upper ends of the shift selection lever and its sub
a flared socket attached to the lower end of the change lever and the other of the upper end of the shift selection lever;
It also includes a lift device that lifts the shift selection lever side of the control rod above the chassis and elastically holds it, so when the tail-cab type vehicle is running, the shift selection lever side of the control rod is Under vibrations such as
The flared socket of the sub-change lever and the connection ball of the shift selection lever are securely maintained in a mated state, and the operating force applied to the change lever on the cab side is applied to the shift selection lever on the chassis side.・It is sufficient that the transmission is transmitted to the lever reliably, the gear shift operation of the transmission is performed reliably, and the space necessary for the back side of the change lever to connect to the interlocking rod attached to its lower end is sufficient. In addition, the spacing between the cab floor and the chassis between the change lever and the sub-change lever is such that a small gap is sufficient for the movement of the interlocking rod; The cab floor can be placed as low as possible, narrowing the driver's blind spot caused by the car's body, and the tail
This is very advantageous and practical for cab-type vehicles.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing a specific example of the transmission control device used in a tail-cab type vehicle of this invention applied to a cab-over type truck, and Figure 2 is a connection between a change lever and an interlocking rod. FIG. 3 is a front view showing the state in which the idle lever, sub-change lever, and shift selection lever are connected. 10... Transmission control device used in tail-cabin type automobiles, 11...
... Bearing, 12... Clevis, 13... Change...
Lever, 14...Interlocking rod, 20...Bracket, 21...Idle lever, 22...Socket, 23...Flare type socket, 24...Sub...
Change lever, 31... Control rod, 32... Shift selection lever, 6
0...Kiyab floor, 61...Shayashi.

Claims (1)

[Scope of Claim for Utility Model Registration] A bearing disposed on the cab floor in a forward position, a change lever penetrating the bearing and being fitted and held in the bearing, and rearward of the bearing. , an idle lever swingably mounted on the back of the cab floor, a sub-change lever rotatably mounted on the lower end of the idle lever, and an interlocking rod that connects the upper end of the sub-change lever; a shift selection lever that is fixedly connected to a control rod located below the cab on the chassis side; A connecting ball attached to one of the lower end of the lever and the upper end of the shift selection lever, and the cab normally receives the connecting ball,
and a floor-type socket attached to the lower end of the sub-change lever and the other upper end of the shift selection lever, and a floor-type socket located on the chassis side so that the connection ball can be removed when the cab is in the tilted state. , and a lift device for lifting and elastically holding the shift selection lever side of the control rod above the chassis.