JPS6121299Y2 - - 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. and a yoke with a pair of sockets.
A change lever, an interlocking rod that connects the lower end of the change lever and the upper end of its sub change lever, and an interlocking rod that connects the lower end of the change lever and the upper end of its sub change lever.
The arm pin, which is fitted into the socket of the yoke provided on the change lever and which is removed from the socket of the yoke when the cab is tilted, is connected to the upper end with a ball joint and placed on the shaft side. a shift selection lever whose lower end is fixedly connected to a control rod that is connected to the control rod; The structure includes a lift device for holding the

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 having a yoke 23 that is removably attached and has a pair of sockets 22, and an interlocking rod 14 connecting the lower end of the change lever 13 and the upper end of the sub-change lever 24. is located below the cab on the side of the chassis 61, and is fitted into the socket 22 of the yoke 23 provided on the sub-change lever 24 when the cab is in its normal state, and when the cab is in the tilted state, the yoke A shift selection lever 32 has an arm pin 30 that is removed from a socket 22 of a shift selection lever 32 connected to an upper end by a ball joint, and a lower end fixedly connected to a control rod 31 disposed on the side of the chassis 61. and a lift device 80 which is disposed on the chassis 61 side and lifts and elastically holds the shift selection lever 32 side of the control rod 31 above the chassis 61.

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 low front 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 sub-change lever 2 has a yoke 23 at its lower end with a pair of sockets 22.
The upper ends of 4 are 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 ball jointed arm pin 30 at its upper end and is welded to a control rod 31 at its lower end.

The arm pin 30 provided at the upper end of the shift selection lever 32 is fitted into the socket 22 of the yoke 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. The yoke 23 is arranged so as to be removed from the socket 22 of the yoke 23.

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 cab, etc., the pair of sockets 22 of its yoke 23 and its arm pin 3
0 in a fitted state, and enables the operating force applied to the change lever 13 on the cab floor 60 side to be reliably transmitted to the shift selection lever 32 on the chassis 61 side. 81, a lift arm 82, a hook arm 83 welded upward from approximately the center of the lift arm 82, a lift rod 85 having a ball seat 84 at its lower end, a ball portion 8 attached to the control rod 31;
6 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 the lift rod 85, which has a ball seat 84 at its lower end, is attached by a pin 89, while the control rod 31 has a ball portion 5.
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 is lifted and held on the control rod 31 via the lift rod 85.

Of course, when this cab is tilted, the arm pin 3 of the shift selection lever 32 attached to the control rod 31
0 is removed from the socket 22 of the yoke 23 provided on the sub-change lever 24, that is, the sub-change lever 13, the interlocking rod 14, the idle lever 21 and the yoke 23 are removed.
The change lever 24 is positioned on the back side of the cab floor 60 and is tilted 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 lift rod 14,
Yoke 23, shift selection lever 32
and control rod 31, which is also connected to the transmission (not shown) via 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 has a yoke with a pair of sockets; An interlocking rod that connects the lower end of the change lever and the upper end of its sub-change lever, and a yoke that is placed on the chassis side below the cab and is provided on the sub-change lever when the cab is in normal condition. The arm pin that is fitted into the yoke socket and removed from the yoke socket when the cab is normally tilted is connected to the upper end with a ball joint, and the control rod placed on the chassis side is fixed at the lower end. the shift selection lever, and a lift device disposed on the chassis side of the control rod for lifting and elastically holding the shift selection lever side of the control rod above the chassis. As a result, when a tail-cab type vehicle is running, the pair of sockets on the yoke and its arm pin are reliably maintained in a fitted state under the vibrations of the chassis and cab, and the change on the cab side is maintained securely.・The operating force applied to the lever is reliably transmitted to the shift selection lever on the chassis side, and the gear shifting operation of the transmission is performed smoothly. All you need to do is create the space necessary to connect to the rod, and also make sure that the distance between the cab floor and the chassis between the change lever and the sub-change lever is necessary for the movement of the interlocking rod. A small air gap is sufficient, and accordingly the cab floor can be placed as low as possible, the blind spot for the driver caused by the body of the car can be narrowed, and the tail It is very useful and practical for cab-type automobiles.

[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...Yoke, 24...Sub change
Lever, 31... Control rod, 32...
...Shift selection lever, 60... Cab floor, 61... Seat.

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. In this position, there is an idle lever swingably mounted on the underside of the cab floor, and a sub-change engine having a yoke rotatably mounted on the lower end of the idle lever and having a pair of sockets. - A lever, an interlocking rod that connects the lower end of the change lever and the upper end of its sub-change lever, and an interlocking rod that is located below the cab on the chassis side and that is connected to the sub-change lever when the cab is in its normal state. An arm pin that is fitted into a socket of the provided yoke and is removed from the socket of the yoke when the cab is tilted is connected to the upper end by a ball joint, and a control pin that is disposed on the chassis side is connected to the upper end of the arm pin. A shift selection lever whose lower end is fixedly connected to a rod, and a lift located on the chassis side of the control rod that lifts and elastically holds the shift selection lever side of the control rod above the chassis. A transmission control device used in a tail-cab type vehicle, including a device.