JPH068669B2 - Transmission operating device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission operating device, and more particularly to a remote control type transmission operating device having two pistons for shifting and selecting, and a piston rod for selecting. A guide surface along the select direction is formed on the side of the yoke rotatably attached to the yoke, and the yoke is slidably contacted with the guide surface to restrict the rotation of the yoke, and thus to escape around the yoke. The present invention relates to a transmission operating device that does not require a space and enables downsizing of a housing.

b. Conventional technology In medium-sized and large-sized vehicles, a remote-controlled transmission operating device is generally adopted. This device is arranged on the upper surface of the transmission 1 as shown in FIG. 5, and is composed of a shift cylinder 2 and a select cylinder 3 which are orthogonal to each other. A striker 5 is rotatably attached to the piston rod 4 of the shift cylinder 2 as shown in FIG. 6, and the lower end tip portion 5a of the striker 5 is juxtaposed in the select direction (left and right direction in FIG. 6). Multiple shifters 6-8
The engaging grooves 6a to 8a are selectively engageable with each other.
On the other hand, a yoke 10 forming a rectangular frame is connected to the piston rod 9 of the select cylinder 3 as shown in FIG.
The striker 5 is inserted into the yoke 10. When the piston rod 9 moves in the left-right direction in FIG. 6, the striker 5 rotates in the left-right direction in FIG. 6 about the piston rod 4, and the tip 5a of the striker 5 engages with the engaging groove of the predetermined shifter 6-8. 6a to 8a are engaged, and then the piston rod 4 moves in the front-back direction (direction perpendicular to the paper surface) in FIG. 6, whereby the shifters 6 to 8, the shift rods 11 to 13, and the shift fork 14 are integrated. The shift movement is performed so that a desired gear shift is performed.

c. Problems to be Solved by the Invention Although the conventional transmission operating device is configured as described above,
The following problems have been pointed out for this device. That is, as shown in FIG. 7, a predetermined gap c is formed between the striker 5 and the yoke 10 in the shift direction (vertical direction in FIG. 7) so that the striker 5 does not interfere with the yoke 10 when shifting. Has been Since the yoke 10 is rotatably attached to the piston rod 9, if there is the above-mentioned gap c, the yoke 10 will be vibrated by the vehicle vibration or the like.
10 rocks. In the conventional device, the housing is designed to be slightly larger in consideration of the swing amount of the yoke, and the interference between the yoke 10 and the housing is prevented.
However, such a large design of the housing is not preferable from the viewpoint of the material cost of the housing and the space factor around the transmission.

The present invention has been devised in view of such circumstances, and an object thereof is to enable downsizing of the housing by restricting the rotation of the yoke.

d. Means for Solving the Problems In order to solve the above problems, the present invention is directed to a shift piston rod so as to be rotatable, and the tip end portion of a plurality of shifters juxtaposed in the select direction. A transmission operating device comprising a striker that is selectively engageable with an engagement groove and a yoke that is attached to a select piston rod and has a tip end engaged with the striker. Further, a guide surface is formed along the select direction, and the yoke is slidably contacted with the guide surface to restrict the rotation of the yoke.

e. Action In the transmission operating device configured as described above, since the yoke is in sliding contact with the guide surface along the select direction, even if the yoke tries to rotate due to vibration of the vehicle, this rotation is It is regulated by the guide surface. Therefore, even if the housing is downsized, there is no possibility that the yoke and the housing will interfere with each other.

f. Example One example of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 shows a vertical cross section in the select direction of a transmission operating device according to the present invention. The same parts as those in FIG. 6 are designated by the same reference numerals. In this device, the plate 18 shown in FIG. 4 is horizontally arranged on the side of the yoke. More specifically, the plate 18 is formed in the shape of a rectangular frame, and the striker 5 and the lower end extension 10a of the yoke 10 are inserted into the hole 19 inside thereof.

A total of six abutting portions 20 to 25 are formed on a pair of side portions of the inner edge of the hole 19 which face each other. These contact parts 20-25
Are formed at a predetermined distance from the axis x of the select piston rod 9, for example, the contact portion 20 is formed at a distance L _R from the axis x, and the contact portion 21 is formed at a distance L _1. ing. On the other hand, a pair of protrusions 28 are formed on both side surfaces of the striker 5 as shown in FIGS. 1 to 3, and when the striker 5 shifts, the protrusions 28 contact the plate 18 with the abutting portions 20 to 20. It comes in contact with one of the 25. Specifically, when the gear is shifted to R, the contact portion 20 is provided, when the first gear is shifted, the contact portion 21 is provided, when the second gear is shifted, the contact portion 22 is provided, and when the third gear is provided, the contact portion 21 is provided. The projection 28 of the striker 5 comes into contact with the contact portion 24 when shifting to 23, and the contact portion 25 when shifting to fourth gear, and to the contact portion 25 when shifting to fifth gear. Therefore, the stroke length of the striker 5 in the shift direction is regulated to a predetermined size by the contact portions 20 to 25 of the plate 18 at each shift speed.

It should be noted that the distance L from the axis x to the abutment portions 20 to 25 is exactly matched with the required stroke length required for the striker 5 at each shift stage, whereby the synchro mechanism on the transmission side is provided. It is designed to completely prevent problems such as excessive force being applied to the gears or accidental gear disengagement. That is, the optimum shift direction stroke length of the synchro sleeve in the synchro mechanism of the transmission (hereinafter referred to as "optimum shift stroke").
Varies depending on the gear and type of transmission. Therefore, if the stroke length of the shift cylinder 2 is set to the shorter optimum shift stroke,
The synchro mechanism does not apply excessive force, but there is a risk that the gear may unexpectedly come off. Further, if the stroke length of the shift cylinder 2 is set to the longer one of the optimum shift strokes, there is no risk of the gear coming off, but an unreasonable force acts on the synchro mechanism. In the conventional transmission operating device, the latter countermeasure is adopted by giving priority to the prevention of gear disengagement. However, in the present invention, the stroke length of the striker 5 at each gear can be matched with the optimum shift stroke. Therefore, it is possible to eliminate the above-mentioned inconvenience and perform an ideal gear shift operation. In addition, if several types of plates 18 are prepared, it is not necessary to change the stroke length of the shift cylinder 2 according to the type of transmission, and it is possible to greatly reduce costs by standardizing the transmission operating device and mass production. is there.

The striker 5 has a yoke 10 as shown in FIGS.
When the yoke 10 is inserted through the hole 31 and moves in the left-right direction in the figure, the striker 5 rotates about the shift piston rod 4 and its tip 5a moves to a predetermined select position. . As shown in FIG. 3, a pair of guided parts 32 are formed on both sides of the yoke 10, and the guided parts 32 are in sliding contact with the upper guide surface 18a of the plate 18. Therefore, the rotation or swinging of the yoke 10 about the select piston rod 9 causes the guide surface 18a of the plate 18 to move.
It is regulated by. Further, a pair of claw portions 33 are formed at the tips of the pair of lower end extension portions 10a of the yoke 10, and the pair of claw portions 33 are engaged with the shifter adjacent to the shifter with which the striker 5 is engaged. Has become.

The transmission operating device is configured as described above, and in the neutral state, after driving the select piston rod 9 to move the striker 5 to a predetermined select position,
When the shift piston rod 4 is driven, the striker 5
The front end portion 5a of the shift lever engages with the engaging grooves 6a to 8a of the shifters 6 to 8 to move the shift rods 11 to 13 in the front-back direction (direction perpendicular to the paper surface) in FIG. Done. At this time, since the protrusion 28 of the striker 5 contacts the contact portions 20 to 25 of the plate 18, the shift stroke of the striker 5 is restricted to the optimum shift stroke at each shift speed. Therefore, it is possible to completely eliminate the problem that the shift sleeve of the synchro mechanism of the transmission shifts without excess or deficiency, and the synchro mechanism receives an excessive force or the gear is accidentally pulled out.

Also, by driving the select piston rod 9, the yoke 10
During the selective movement of the pair, the pair of guided portions 32 formed on both sides of the yoke 10 are guided by slidingly contacting the guide surface 18a of the plate 18. Therefore, even if the vehicle is vibrated, the yoke 10 does not swing at all, and even if the housing is made compact, there is no risk of the yoke 10 and the housing interfering with each other, and smooth selection operation is possible.

In this way, the rotation of the yoke 10 can be prevented,
In addition to the advantages described above, the following advantages also occur. That is, when the transmission 1 is operated extremely quickly, for example, when gear shifting is almost instantaneously performed from the first speed to the second speed, the first gear is made neutral and the tip of the striker 5 is inserted into the engagement groove 7a of the shifter 7. Shift rod in stages
The inertial movement of 11 is blocked by the claw portion 33 of the yoke 10, and so-called erroneous inertial insertion such as accidental engagement of the R gear is prevented. Some of the claw portions 33 of the yoke 10 are provided in the conventional device, but none of them have the rotation of the yoke 10 restricted. Therefore, in the conventional device, due to the movement inertia of the shift rod 11, the other shift rod 13 with which the claw portion 33 of the yoke 10 is engaged also integrally moves, and as a result, the engagement grooves 6a of the shifters 6-8 are formed. There was a risk of causing a so-called non-uniformity phenomenon in which ~ 8a did not line up even when in neutral. If this non-uniform phenomenon occurs, the claw portion 33 of the yoke 10 or the tip of the striker 5 cannot be smoothly inserted into the engagement grooves 6a to 8a during the select operation, and in some cases, the tip 5a of the striker 5 and the engagement groove 6a to 6a. 8a and a twist,
There is also a risk of damaging them.

However, according to the present invention, since the rotation of the yoke 10 is completely restricted by the guide surface 18a of the plate 18, it is possible to reliably prevent the inertial movement of the shift rods 11 to 13, and to prevent the shifters 6 to 8 from becoming uneven. Can be prevented.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and various modifications can be made.
For example, in the above-described embodiment, the guide surface 18a that blocks the rotation of the yoke 10 is formed on the plate 18. However, the guide surface does not necessarily have to be provided on the plate, and may be formed on another portion other than the frates 18. Of course. Further, since it is sufficient for the guide surface 18a to substantially prevent the rotation of the yoke 10, a guide rod parallel to the select piston rod 9 is provided in some cases, and the guide rod is slidably inserted into the yoke. May be

Further, in the above-mentioned embodiment, the claw portion 33 of the yoke 10 prevents the transmission gear from being erroneously input, but the pair of solenoid valves for supplying and discharging compressed air to and from the shift cylinder is neutralized for a predetermined short time. Both of them may be turned on to temporarily stop the shift movement of the striker, thereby preventing the above-mentioned false inertia input. In this case, the claw portion 33 of the yoke 10
Is not always necessary.

g. Effect of the Invention As described above, according to the present invention, the yoke is slidably contacted with the guide surface along the select direction to restrict the rotation of the yoke. Therefore, in order to prevent interference with the yoke, the yoke swings. It is not necessary to design the housing to be large in view of the amount of movement, so that the housing can be made compact, lightweight, and the material cost can be reduced. In a device that prevents the so-called erroneous insertion of inertia by engaging the claw portion of the yoke with the engagement groove of the shifter, it is possible to reliably prevent the shifter from being misaligned. There is no risk of accidental twisting, and you can always achieve smooth select operations.

[Brief description of drawings]

1 is a longitudinal sectional view of a transmission operating device according to the present invention, FIG.
The drawing is a plan view of the same device as seen from above the yoke, FIG. 3 is a side view taken along the line III-III of FIG. 1, and FIG. 4 is a plan view of a plate. FIG. 5 is a plan view of a conventional transmission operating device,
6 is a sectional view taken along the line VI-VI of FIG. 5, and FIG. 7 is a sectional view taken along the line VII-VII of FIG. 4 ... shift piston rod, 5 ... striker, 6-8 ... shifter, 6a ... 8a ... engaging groove, 9 ... select piston rod, 10 ... yoke, 11-13 ... shift rod, 18 ... plate, 18a ... guide Surface, 20 to 25 ... Abutting portion, 28 ... Projection portion, 32 ... Guided portion, 33 ... Claw portion.

Claims (1)

[Claims] 1. A striker rotatably attached to a shift piston rod, the tip of which can be selectively engaged with engagement grooves of a plurality of shifters arranged in the select direction.
In a transmission operating device having a yoke attached to a select piston rod and having a tip end engaged with the striker, a guide surface is formed laterally of the yoke along the select direction, and the guide surface is formed. A transmission operating device characterized in that the yoke is slidably contacted with a surface to restrict the rotation of the yoke.