JPS6210852B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a transmission control device used in a tail-cab type motor vehicle.

Conventionally, the transmission control device for this type of tail cab type vehicle is
Regardless of whether or not the cab is tilted, the gear shift and select lever is connected to the control rod via a linkage mechanism, and when the cab is tilted, the gear shift and select lever is
Some devices disconnect the shift and select lever from the control rod.

The former has a structure in which the link mechanism passes through the tail center, and the latter is based on British Patent No.
1374391 and U.S. Pat. No. 4,220,217, ball and flared ball socket means or arm pin and yoke means for coupling the gear shift and select lever to the control rod. However, in order to fully accommodate the cab suspension, both had complicated structures, which could result in rattling or reduced rigidity.

The purpose of this invention is to connect the gear shift and select lever and the control rod regardless of whether the cab is tilted or not, without complicating the structure, and to prevent rattling and , prevents a decrease in rigidity, ensures reliable and smooth transmission gear shifting, and improves the cab.
It is fully compatible with suspension, and furthermore,
An object of the present invention is to provide a transmission control device used in a tail-cab type automobile, which is capable of handling gear change operations of a multi-stage transmission equipped with a main gear transmission and an auxiliary gear transmission.

To solve such problems, the transmission control device used in the tailed cab type vehicle of the present invention first consists of a gear shift and select lever located on the floor of the cab and a transmission control device. A plurality of sliding tubes with different diameters are sequentially connected telescopically to the control rod on the shift fork shaft side of the gear shifter, and the sliding tube located at the top is connected to the gear shifter.・At the lower end of the AND SELECT LEVER, there is a telescope-type main link rod in which the lowest sliding tube is pivotally connected to the chassis, and the lower end is pivotally connected below the main link rod. , a sub-link rod placed behind the main link rod, and a selector with one end fixed to the tip of the control rod and the other end pivoted to the upper end of the sub-link rod.・When the arm and its cab are in the riding position, its sub-
When the link rod is locked to its main link rod and the cab is tipped beyond the travel range of the cab suspension,
It includes means with a sub-link rod locking mechanism for releasing the sub-link rod from its main link rod, and also makes the selection operation of the gear shift and select lever more reliable. The means includes means for a control rod support having a lower end pivotally connected to the chassis and an upper end pivotally connected to the distal side of the control rod; In order to make the gear shifting operation more reliable and smooth, these means include means for a gear slippage prevention mechanism disposed between the control rod and the shift fork shaft side of the transmission. It is configured.

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

Figures 1 to 5 show the transmission of the present invention applied to a tail-cab type truck.
A tenth specific example of the control device is shown.

The transmission control device 1
0 is arranged on the floor of the cab and has a bearing 11 fixed to the floor 101 by bolt-nut means (not shown), and the lower end thereof is passed through the lower surface of the floor 101, that is, the side of the chassis 100. The gear shift and select lever 12 is fitted into the bearing 11 and held pivotably;
A telescoping main link rod 13 is pivotally connected to the lower end of the lever 12 and to the chassis.
and a sub-link rod 14 whose lower end is pivotally connected to the lower part of the main link rod 13, and which is disposed behind the main link rod 13 in the longitudinal direction of the track. A control rod 15 is disposed on the chassis 100 with its rear end extending toward the link rod 14 side and toward the transmission 90 side.
, a select arm 16 having one end connected to the tip of the control rod 15 and the other end connected to the sub link rod 14, and a control rod support 17 supporting the tip of the control rod 15. , a sub-link rod locking mechanism 18 for its sub-link rod 14, and a gear release disposed between its control rod 15 and a transmission shift fork shaft (not shown). It is composed of a prevention mechanism 19.

The bearing 11 is installed in an opening (not shown) in the floor 101.
It consists of a housing 20 that is fitted into the floor 101 and fixed to the floor 101 by bolt-nut means with a washer (not shown) interposed therebetween, and a ball seat 21 that is fitted into the bearing bore of the housing 20. , the bearing bore has a lower inner circumferential surface formed as a partially spherical surface, and the ball seat 21 also has inner and outer circumferential surfaces consisting of partially spherical surfaces.

Gear shift and select lever 12
passes through the bearing 11 and connects the lower end side to the floor 10
A pivot ball 22 is formed near the lower end of the pivot ball 22 to extend downward from the bearing 11 and to be fitted and held in the bearing 11, and a knob 23 is screwed to the upper end.

The pivot ball 22 is connected to the bearing bore of the bearing 11, i.e. the ball seat 2
1 and held within the ball seat 21 by a snap ring (not shown) with a washer (not shown) interposed therebetween;
It is rotated within its bearing 11. As a result, the gear shift and select lever 12 performs gear shift and select operations using the bearing 11 as a fulcrum.

Telescope type main link rod 13
The three sliding tubes 24, 25, 26 of different diameters are sequentially connected telescopically, and the lower end of the sliding tube 24 located at the lowest position among the sliding tubes 24, 25, 26 is It consists of a welded ball joint 27 and a capped ball joint 28 welded to the upper end of the sliding pipe 26 located at the top of the sliding pipes 24, 25, 26. A joint 28 is connected to the chassis bracket, and a ball joint 27 is connected to the lower end of the gear shift and select lever 12.

As understood from FIG. 3, the sliding pipe 24 is
At the upper end, a hooking protrusion 29 is formed on the inner surface. The hooking protrusion 29 is connected to the sliding tube 24
It consists of an annular stepped portion formed on the inner surface of the Further, the sliding tube 24 has a ball joint 27 welded to its lower end.

The sliding pipes 25 are intermediate sliding pipes, the number of which is determined depending on the height between the cab floor 101 and the chassis 100.
A hooking protrusion 30 is formed on the inner surface, and a drawer protrusion 31 is formed on the outer surface at the lower end side.

Similar to the hooking projection 29 of the sliding tube 24, the hooking projection 30 is formed on the inner surface of the sliding tube 25, and is configured as an annular stepped portion. , a ring fitted onto the outer surface of the sliding tube 25 and welded to the sliding tube 25 at a predetermined position. Of course, the pull-out protrusion 31 allows the sliding tube 24 to be pulled out when the sliding tube 25 is telescopically, that is, slidably fitted into the sliding tube 24 and pulled out from the sliding tube 24. Hook the hooking protrusion 29.

The sliding tube 26 has a capped ball joint 28 welded to its upper end, and a capped ball joint 28 welded to its lower end.
A pull-out projection 32 is formed on the outer surface. The drawer protrusion 32 is the drawer protrusion 31 of the sliding tube 25.
As in the case of , the sliding tube 26 is fitted onto the outer surface of the sliding tube 26 at a predetermined position.
It consists of a ring welded to 6. Similarly to the case of the pull-out protrusion 31 of the sliding tube 25, the pull-out protrusion 32 also
5 telescopically, that is, slidably fitted, and when pulled out from the sliding tube 25, the hooking protrusion 30 of the sliding tube 25 is hooked.

When the sliding tube 26 is formed to have a narrow outer diameter, it is constructed from a solid round rod.

In this way, those sliding tubes 24, 25, 2
6 are sequentially telescopically connected and expanded and contracted.

The ball joint 27 is connected at its threaded portion 33 to the bracket of the chassis 100, and the capped ball joint 28 is connected at its threaded portion 33 to the bracket of the chassis 100.
4 to gear shift and select lever 1
It is connected to the lower end of 2.

Further, the cap 35 of the ball joint 28 closes the upper end opening of the slide tube 24 when the slide tubes 25, 26 are retracted into the slide tubes 24, 25.

Sub link rod 14 is a control
Rod 15 side to its main link Rod 13
The main link rod 13 is located behind the main link rod 13 in the longitudinal direction of the track.

The sub-link rod 14 is connected to the sliding tube 24.
a shorter rod 36, and a yoke-type link arm 37 welded to the lower end of the rod 36;
The yoke end of the link arm 37 is pivotally connected to the ball joint 27 via a pin 39, and the yoke end of the link arm 37 is pivotally connected to the ball joint 27 via a pin 39. ing. Further, the sub-link rod 14 has a bearing hole 40 in which a pin 51 for connecting the select arm 16 is fitted, formed in the rod 36 adjacent to the jaw receiver 38.

The control rod 15 is located on the chassis, and the main link rod 1
The leading end is offset above the axis so that it is located above the lower end of 3, extending the leading end toward its main and sub link rods 13, 14, and Mission 90
It extends to the side.

The select arm 16 has one end fixed to the distal end of the control rod 15 and the other end pivotally connected to the sub link rod 14.
The gear shift and select lever 1
2 can be transmitted to the control rod 15 side.

The select arm 16 is connected to the root side boss 42.
and an arm body 41 with a tip side boss 43
and a yoke 44 held by the distal end side boss 43.
It is composed of.

The arm body 41 has a bearing hole (not shown) of a base boss 42 fitted into the tip of the control rod 15, and the base boss 42 is fixed to the control rod 15. Further, the arm body 41 has a yoke spindle 46 fitted into the bearing hole 45 of the distal end boss 43 with a bush 47 interposed therebetween, and a threaded portion 48 of the yoke spindle 46.
A nut 49 is screwed into the yoke 44 to hold the yoke 44 on the distal end side boss 43.

The yoke 44 has a bearing hole 50 that shares a common axis.
, align the bearing hole 49 with the bearing hole 40 of the sub-link rod 14, and
It is pivotally connected to the rod 36 by fitting the pin 51 into the pins 0,50. In that way,
Select arm 16 is sub link rod 1
Pivotally connected to 4.

Further, when the yoke 44 is connected to the rod 36 via the pin 51, the main link rod 1
3, that is, the fork portions 52 located on both sides of the sliding tube 24 extend integrally to the tip.

The control rod support 17 includes a support cylinder 53, a plunger 54 with a ball fitted to the support cylinder 53 so as to be able to slide back and forth, and a ball 56 of the plunger 54.
The ball socket 57 is fitted into the control rod 15 and fixed to the tip of the control rod 15.

The support cylinder 53 is provided with a boss 58 at its lower end, and is swingable only in the longitudinal direction of the truck on a bracket (not shown) of the chassis 100 via a pin 60 fitted into a bearing hole 59 of the boss 58. is pivotally connected to. Further, a cap 61 is screwed onto the upper end of the cylinder 53 to prevent the plunger 54 from coming off.

The plunger 54 extends its ball side to the outside of its cylinder 53, that is, the cap 61, and controls the control rod support 17 by fitting a ball 56 into a ball socket 57 fixed to the control rod 15. - Pivotally connected to the control rod 15, thus supporting the distal end of the control rod 15, which is offset above the axis, above the lower end of its main link rod 13. Of course, the ball 56 is fitted into a ball seat 62 located within the bearing bore of the ball socket 57.

The sub-link rod locking mechanism 18 is
A pair of lock bars 64 and 65 are pivotally connected to a bracket 63 welded to the sliding tube 24 at a predetermined height so as to be able to engage with the jaw receiver 38 of the link rod 14;
A swinging hook 66 is swingably attached between the tips of rods 4 and 65, and its main link rod 1.
A lifting hook 67 is welded to the cap 35 of the ball joint 28 so as to hook the swinging hook 66 as the ball joint 3 extends, and a pull-up hook 67 for removing the swinging hook 66 from the lifting hook 67. The main link rod 13 has a release cam 68, and its main link rod 13 has a predetermined expansion and contraction stroke range, that is, 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).
stroke range L), the sub link rod 14 is connected to its main link rod 14.
when the main link rod 13 is extended beyond its predetermined telescopic stroke range, i.e. from the riding position to the tilted position, the cab suspension stroke range When tailed beyond L, the sub link rod 14 is released from its main link rod 13.

The pair of lock bars 64, 65 sandwich the sliding tube 24, and the pair of arms 69, 7 of the bracket 63 are welded to the sliding tube 24.
one end is rotatably connected to 0 via a pin 71,
A lock jaw 72 is formed at the other end to enable engagement with the jaw receiver 38 of the sub-link rod 14 when the cab is in the riding position.

Also, the lock bars 64 and 65 have one end fixed to the bar and the other end fixed to the bracket, respectively.
A return spring 73 wrapped around the pin 71 causes the lock 7
2 is always applied in the direction of meshing with the retainer 38.

Further, the locking bars 64, 65 form a cam surface 74 at the other end, which is cooperated with the return spring 73 to form a cam surface 74 when the cab is lowered from the tilted position to the riding position. The lock jaw 72 can be guided to the jaw receiver 38 while sliding on the jaw receiver 38.

The swinging hook 66 is pivotally connected between the ends of the lock bars 64 and 65, and one end of a return spring 75 is hooked to the swinging hook 66. A force directed toward the release cam 68 is always applied to the release cam 68.

The lifting hook 67 is activated when the cab is tipped from the riding position to the tilted position beyond its cab suspension stroke range L, i.e. when the main link rod 13
When extended telescopically, the lock bar 64, 65 is lifted by hooking the swing hook 66, and the pair of lock bars 64, 65 are lifted up against the return spring 73. 64 and 65 are rotated upward around pin 71, and the locking jaw 72 is removed from the jaw receiver 38.
and releases the sub-link rod 14 from its main link rod 13, allowing the main link rod 13 to extend telescopically in response to the tilt of the cab.

A release cam 68 is welded to the sliding tube 24, and when the cab is tilted to position B, the release cam 68 removes the swinging hook 66, which has been lifted up by the lifting hook 67, from the lifting hook 67, and removes the cab from the lifting hook 67. While the vehicle is being lowered into the riding position, the lock bars 64, 65 are maintained in a waiting state so that the lock jaw 72 can engage the jaw receiver 38.

Of course, the arrangement of the swinging hook 66, the lifting hook 67, and the release cam 68 is such that the locking and unlocking operations of the locking bars 64 and 65 shown in FIGS. 4 and 5 are possible. It is.

The gear slippage prevention mechanism 19 includes an equalizer bar using a ball joint, and prevents gear slippage of the transmission 90 due to engine vibration.
and the tip of the auxiliary control rod 15a. Of course, the auxiliary control rod 15a is the transmission 90.
A gear shift housing 91 is connected to a control shaft 92 having a select lever (not shown), and a gear shift and
Gear shift and select lever 1 on select shaft, shift fork shaft
2 movements are transmitted sequentially.

The gear slippage prevention mechanism 19 includes a link lever 76 whose base is pivotally connected to the chassis side fulcrum 77 and whose tip is connected to the rear end of the control rod 15 via a ball joint. Fit the splinted shaft 80 into the splinted sleeve 78 of the lever 76, and attach the tip to the auxiliary control rod 15.
a, a link lever 79 connected to the link lever 79 via a ball joint, a link lever 81 with its base connected to the transmission side and its tip connected to the link lever 79 by a pivot, its control rod 15, and its auxiliary link lever 79. The select link rod 82 is pivotally connected between the control rods 15a. Of course,
The select link rod 82 is connected to a ball joint link lever 83 that connects the link lever 76 to the control rod 15.
and a ball joint link lever 83 connecting link lever 79 to its auxiliary control rod 15a.

Next, referring to the gear shifting operation of the transmission control device 10 configured as described above, when the cab is in the riding position, the movement of the gear shift and select lever 12 is controlled by the sub link. - The main rod 14 is locked by the sub-link rod locking mechanism 18.
Since it is locked to link rod 13, main link rod 13 and sub link rod
The signal is transmitted via the rod 14 to the select arm 16, control rod 15, and then to the shift fork shaft of the transmission 9.

On the other hand, when the cab is tilted from the riding position to the tilted position, as the cab tilts,
First, the sliding tube 26 is pulled out and when it reaches point A (release start point) in FIG. 4, the lifting hook 67 starts lifting while hooking the swinging hook 66. Accordingly, lock bars 64, 65 are rotated upwardly around pin 71 against return spring 73 and begin to disengage lock jaw 72 from jaw receiver 38, causing main link rod 13 and sub The lock with Link Rod 14 begins to break. Furthermore, when the cab is tilted and the sliding tube 26 is pulled out to point B in FIG. Unraveled.

As a result, the main link rod 13 is pivotally connected to the gear shift and select lever 12 and extends telescopically in response to the tilt of the cab. Also, due to the action of the release cam 68, the swinging hook 66 is pulled up and released from the hook 67, and the lock lever 64,
65 enters a lock wait state. In this case, control rod 15 is pivotally connected to sub-link rod 14 via select arm 16.

Furthermore, when the cab is lowered from the tilted position toward the riding position, the main link rod 13 is also retracted along with the cab, and the fourth
Near point A in the figure, as shown in FIG.
While pushing back against the force of the spring 75, it lowers below the swinging hook 66, and both hooks are in a state where they can be engaged, that is, due to the extension of the main link rod 13, the main link rod 13 and the sub-link The state returns to a state where the lock with the link rod 14 can be released. Furthermore, if the cab is lowered, the lock bars 64, 6 will move as the main link rod 13 is further retracted.
The cam surface 74 of No. 5 is pressed against the jaw receiver 38 by the return spring 73.
When the cab is returned to the riding position by sliding on the jaw holder 38, the lock jaw 72 is reengaged with the jowl holder 38, and the lock bars 64, 65 are moved as shown in FIG. Sub link
The rod 14 is locked to the main link rod 13, and the movement of the gear shift and select lever 12 is transferred to the transmission 9 via the select arm 16, control rod 15, etc.
0 shift/fork/shaft reliably, and
Make it possible to communicate accurately. Therefore, the transmission 90 can be operated to change gears.

According to the above invention, a gear shift and select lever, a telescopic main link rod in which a plurality of sliding tubes with different diameters are sequentially connected in a telescopic manner, and the main link rod. A sub-link rod whose lower end is pivotally connected to the lower part of the rod, a control rod, a select arm that connects the sub-link rod to its control rod, and a select arm that connects the sub-link rod to its main rod. Lock to a link rod and also release its sub link rods from its main link rod. It is composed of a sub-link rod locking mechanism, and is also equipped with a control rod support and a gear slip-out prevention mechanism, so the structure is extremely simplified compared to conventional devices, and the cab is Regardless of whether it is tilted or not, the gear shift and select lever remains connected to the control rod, reducing rattling and improving rigidity. It becomes possible to fully correspond to the stroke, and the gear shift from the chassis is possible.
Vibration and noise transmitted to the select lever are absorbed and alleviated by the telescopic telescoping action of the main link rod, and the gear shifting operation of the transmission is accurate, reliable, and smooth. Furthermore, it can be handled by changing speeds of a multi-stage transmission including a main gear transmission and an auxiliary gear transmission.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a specific example of a transmission control device of the present invention applied to a transmission of a tilted cab type truck;
2 is a partial side view of the transmission control device shown in FIG. 1; FIG. 3 is an exploded sectional view of the telescopic main link rod of the transmission control device shown in FIG. 1; 4 and 5 are partial side views of the telescoping main link rod of the transmission control device shown in FIG. 1; 10...Transmission control device, 11...Bearing, 12...Gear shift and...
Select lever, 13...Telescope type main link rod, 14...Sub link rod, 15...Control rod, 15a...Auxiliary control rod, 16...Select arm, 17...Control rod support, 1
8...Sub link rod locking mechanism, 19...Gear dropout prevention mechanism, 24, 25, 26...Sliding pipe, 27
...Ball joint, 28...Ball joint with cap, 29,30...Hook protrusion, 3
1, 32...Drawer projection, 41...Arm body, 44
... Yoke, 53 ... Support cylinder, 54 ... Plunger with ball, 64, 65 ... Lock bar, 66 ... Swinging hook, 67 ... Pulling hook, 6
8...Release cam, 90...Transmission.

Claims (1)

[Claims] 1. A gear shift and select lever that passes through a bearing disposed on the floor of the cab and is pivotally held by the bearing, and a plurality of sliding tubes of different diameters are sequentially connected to the gear shift and select lever. The telescope is connected in a telescopic manner, with the sliding tube located at the top being pivotally connected to the lower end of the gear shift and select lever, and the sliding tube located at the bottom being pivotally connected to the chassis. A scope-type main link rod, a sub-link rod whose lower end is pivotally connected below the main link rod, and a sub-link rod located behind the main link rod; Extends to the link rod side, connects the rear end to the shift fork shaft side of the transmission, and fixes one end to the control rod placed on the shaft, and one end to the tip side of the control rod. and a select arm whose other end is pivotally connected to the upper end of its sub-link rod, and when its cab is in the riding position, its sub-link rod
When the link rod is locked to its main link rod and the cab is tipped beyond the travel range of the cab suspension,
A transmission control device used in a tail cab type vehicle including a sub-link rod locking mechanism for releasing the sub-link rod from its main link rod. 2. The gear shift and select lever, which is pivotally held by a bearing placed on the floor of the cab, is connected to the gear shift and select lever, which passes through a bearing placed on the floor of the cab, and multiple sliding tubes of different diameters are sequentially connected in a telescopic manner. The main link is a telescoping type in which the sliding tube located at the highest level is pivoted to the lower end of the gear shift and select lever, and the sliding tube located at the lowest position is pivotally connected to the chassis. a sub-link rod whose lower end is pivoted below the main link rod, a sub-link rod located behind the main link rod, and whose tips extend toward the main and sub-link rods; and the rear end is extended to the shift fork shaft side of the transmission, and the control rod disposed on the shaft is fixed to the front end of the control rod, and the other end is fixed to the control rod disposed on the shaft. The select arm is pivotally connected to the upper end of the sub-link rod, and when the cab is in the riding position, the sub-link
When the link rod is locked to its main link rod and the cab is tipped beyond the travel range of the cab suspension,
a sub-link rod locking mechanism for releasing the sub-link rod from its main link rod; and a sub-link rod locking mechanism disposed between the rear end of the control rod and the shift fork shaft side of the transmission. A transmission control device used in tail-cab type automobiles, which includes a gear slippage prevention mechanism. 3 The gear shift and select lever, which is pivotally held by a bearing placed on the floor of the cab, is connected to the gear shift and select lever, which passes through a bearing placed on the floor of the cab, and multiple sliding tubes of different diameters are sequentially telescopically connected. The main link is a telescoping type in which the sliding tube located at the highest level is pivoted to the lower end of the gear shift and select lever, and the sliding tube located at the lowest position is pivotally connected to the chassis. a sub-link rod whose lower end is pivoted below the main link rod and is located rearward of the main link rod; and a sub-link rod located above the lower end of the main link rod. The leading end is extended to the main and sub link rod sides, and the rear end is connected to the shift fork shaft side of the transmission so that the control rod located on that shaft can be connected to the transmission. , a select arm with one end fixed to the distal end of its control rod and the other end pivoted to the upper end of its sub-link rod; its lower end fixed to its chassis and its upper end fixed to the distal end of its control rod; control rod supports that are each pivotally connected to the
When the link rod is locked to its main link rod and the cab is tipped beyond the travel range of the cab suspension,
A transmission control device used in a tail cab type vehicle including a sub-link rod locking mechanism for releasing the sub-link rod from its main link rod. 4 The gear shift and select lever, which is pivotally held by a bearing placed on the cab floor, is connected to the gear shift and select lever, which passes through a bearing placed on the floor of the cab, and multiple sliding tubes of different diameters are sequentially connected in a telescopic manner. The main link is a telescoping type in which the topmost sliding tube is pivoted to the lower end of the gear shift and select lever, and the topmost sliding tube is pivoted to the chassis. a sub-link rod whose lower end is pivoted below the main link rod and is located rearward of the main link rod; and a sub-link rod located above the lower end of the main link rod. The leading end extends toward the main and sub-link rods, and the rear end extends toward the transmission, so that the control rod is located in the chassis, and one end extends toward the control rod. A select arm is fixed to the tip of the rod and the other end is pivotally connected to the upper end of the sub-link rod, the lower end is pivoted to the chassis, and the upper end is pivoted to the tip of the control rod. control rod support and its sub-mount when the cab is in the riding position.
When the link rod is locked to its main link rod and the cab is tipped beyond the travel range of the cab suspension,
a sub-link rod locking mechanism for releasing the sub-link rod from its main link rod; and a sub-link rod locking mechanism disposed between the rear end of the control rod and the shift fork shaft side of the transmission. A transmission control device used in tail-cab type automobiles, which includes a gear slippage prevention mechanism.