JPH0672662B2 - Transmission operating device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is rotatably attached to a shift piston rod, and its tip can be selectively engaged with engagement grooves of a plurality of shifters juxtaposed in the select direction. The present invention relates to a transmission operating device including a striker and a yoke attached to a select piston rod and having a tip end engaged with the striker.

[0002]

2. Description of the Related Art A remote control type speed control device is generally employed in medium and large size automobiles. As shown in FIG. 5, this device is arranged on the upper surface of the transmission 1 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 (the horizontal direction in FIG. 6). The shift grooves 6a to 8a of the shifters 6 to 8 are selectively engageable with each other.

On the other hand, the piston rod 9 of the selection cylinder 3 has a yoke 10 forming a rectangular frame as shown in FIG.
And 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 the engaging grooves 6a of the predetermined shifters 6-8. 8a, the piston rod 4 is moved in the front-back direction (direction perpendicular to the paper surface) in FIG. 6 to shift the shifters 6-8,
The shift rods 11 to 13 and the shift fork 14 are integrally shift-moved so that a desired gear shift is performed.

[0004]

Although the conventional transmission operating device is constructed as described above, the following problems have been pointed out in this device. That is, the optimum shift direction stroke length of the synchro sleeve in the synchro mechanism of the transmission (this length is referred to as "optimal shift stroke length" in the present specification) is determined at each shift stage and also for the type of transmission. It depends on the situation. Therefore, if the stroke length of the shift cylinder 2 is set to the shorter optimum shift stroke length, an unreasonable force is not applied to the synchro mechanism, but there is a possibility that the gear may unexpectedly come off. Further, if the stroke length of the shift cylinder 2 is set to the longer optimum shift stroke length, there is no risk of the gear coming off, but an unreasonable force acts on the synchro mechanism. Therefore, conventionally, the latter situation has been adopted in the prior art by prioritizing prevention of gear disengagement.

The present invention has been devised in view of such circumstances, and an object thereof is to make the stroke amount (length) of the striker 5 at each shift stage match the optimum shift stroke length. It is an object of the present invention to provide a transmission operating device having a structure capable of performing the above.

[0006]

In order to achieve the above object, according to the present invention, a shift piston rod is rotatably attached, and its tip portion is provided with a plurality of shifters arranged in parallel in the select direction. The striker is inserted in a transmission operating device including a striker that is selectively engageable with the engagement groove and a yoke that is attached to the select piston rod and has a tip end engaged with the striker. In the opening of the transmission housing that is provided, an abutting portion that abuts when the striker shifts is provided for each gear, and each abutting portion has a predetermined length toward the center of the opening. By projecting, the shift stroke of the striker is regulated to a predetermined optimum shift stroke length at each shift speed.

[0007]

In the transmission operating device constructed as described above, when the striker is shifted, the striker comes into contact with the abutment portion and is regulated at each predetermined stroke position.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

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,
4, the striker 5 is inserted into the opening 50a of the transmission housing 50, and the plate 18 clearly shown in FIG. 4 is horizontally arranged on the side of the yoke 10 in the opening 50a. . More specifically, the plate 18 is formed in a rectangular frame shape, and the striker 5 and the lower end extension portion 10 a 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 and project toward the center of the opening 50a by a predetermined length. These abutting portions 20 to 25 are formed at predetermined distances from the axis line x of the select piston rod 9, for example, the abutting portion 20 is a distance from the axis line x to LR, and the abutting portion 21 is L1. Are formed at different distances.

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 abutment portion 20 of the plate 18. It comes into contact with one of .about.25. More specifically, when it shifts to R, it contacts the contact portion 20, when it shifts to the first speed, it contacts the contact portion 21 when it shifts to the second speed, and when it shifts to the third speed, it contacts the contact portion 22. When the gear shifts to the contact portion 23 to the fourth speed, the contact portion 24
In addition, the projections 28 of the striker 5 come into contact with the abutting portions 25 when shifting to the fifth speed.
Therefore, the stroke length of the striker 5 in the shift direction is determined by the contact portions 20 to 25 of the plate 18 at each shift speed.
Therefore, each is regulated to a predetermined size (optimum shift stroke length).

The distance L from the axis x to the abutting portions 20 to 25 is made equal to the required shift stroke length required for the striker 5 at each shift stage. As a result, it is possible to completely prevent problems such as an unreasonable force acting on the synchro mechanism on the transmission side or an accidental gear disengagement. That is, according to the present invention, since the stroke length of the striker 5 at each shift speed can be matched with the optimum shift stroke, there is no fear of gear disengagement and an ideal force without exerting an excessive force on the synchronizing mechanism. Gear shifting operation is possible.

On the other hand, the striker 5 is inserted into the hole 31 of the yoke 10 as shown in FIGS. 1 and 2, and when the yoke 10 moves in the left-right direction in the figure, the striker 5 rotates about the shift piston rod 4. The tip portion 5a thereof is moved to a predetermined select position.

A pair of guided parts 32 are formed on both sides of the yoke 10 as shown in FIG. 3, and the guided parts 32 are in sliding contact with the upper guide surface 18a of the plate 18. Therefore, the rotation or swing of the yoke 10 around the select piston rod 9 is restricted by the guide surface 18a of the plate 18. Further, a pair of claw portions 33 are formed at the tips of the pair of lower end extensions 10a of the yoke 10, and the pair of claw portions 33 are adapted to engage with a shifter adjacent to the shifter with which the striker 5 is engaged. ing.

The transmission operating device is constructed as described above. When the shift piston rod 4 is driven after the select piston rod 9 is driven to move the striker 5 to a predetermined select position in the neutral state,
The tip portion 5a of the striker 5 has an engaging groove 6a for the shifters 6-8.
To 8a are selectively engaged to move the shift rods 11 to 13 in the front-rear direction (direction perpendicular to the paper surface) in FIG. 1, whereby a desired gear shift is performed. 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 amount of the striker 5 is restricted to the optimum shift stroke length 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.

When the select piston rod 9 is driven to move the yoke 10 to select, the yoke 1 is moved.
The pair of guided portions 32 formed on both sides of 0 are slidably guided by the guide surface 18a of the plate 18. Therefore, the yoke 10 does not rock at all even when the vehicle is vibrated, 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.

The fact that the rotation of the yoke 10 can be prevented as described above has the following advantages in addition to the advantages described above. That is, when the transmission 1 is operated very 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. In the step, the inertial movement of the shift rod 11 is caused by the claw portion 33 of the yoke 10.
This prevents the so-called erroneous inertial input, which is prevented by the above and the R gear is accidentally input. Claw portion 3 of the yoke 10
Although 3 was provided even in the conventional device, the one in which the rotation of the yoke 10 is restricted does not yet exist. Therefore, in the conventional device, due to the inertia of movement 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 therefore, the engaging grooves 6a of the shifters 6 to 8 are caused. There is a risk that a so-called non-uniformity phenomenon may occur in which .about.8a are not aligned in a straight line even when neutral. When 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 engaging grooves 6a to 8a during the select operation, and in some cases, the tip 5a of the striker 5 and the engaging groove 6a to 8a. 8a may be twisted and damaged. However, according to this embodiment, since the rotation of the yoke 10 is completely restricted by the guide surface 18a of the plate 18, the inertial movement of the shift rods 11 to 13 can be reliably prevented,
The uneven phenomenon of the shifters 6 to 8 can be prevented.

As described above, one embodiment of the present invention has been described.
The present invention is not limited to these embodiments, and various modifications and changes can be made based on the technical idea of the present invention. For example, the arrangement structure of the contact portions 20 to 25 can be changed as necessary. Further, the striker is attached to the contact portion 2
You may make it contact | abut directly to 0-25.

[0018]

As described above, according to the present invention, the shift stroke of the striker is regulated to the predetermined optimum shift stroke length at each shift stage, so that the synchro mechanism on the transmission side is impossible. It is possible to completely prevent a problem that a force acts or a gear is accidentally pulled out. That is, in the present invention, since the stroke amount of the striker at each shift speed can be made to match the optimum shift stroke length, there is no fear of gear disengagement and an ideal force without exerting an excessive force on the synchro mechanism. Gear shifting operation is possible. In addition, by preparing several types of plates 18, it is not necessary to change the stroke length of the shift cylinder 2 according to the type of transmission, and the cost is greatly reduced by the standardization of the transmission operating device and the effect of mass production. Is possible.

[Brief description of drawings]

FIG. 1 is a vertical cross section of a transmission operating device according to the present invention.

FIG. 2 is a plan view of the same device as seen from above a yoke.

FIG. 3 is a side view taken along the line AA of FIG.

FIG. 4 is a plan view of a plate.

FIG. 5 is a plan view of a conventional transmission operating device.

6 is a cross-sectional view taken along the line BB of FIG.

7 is a cross-sectional view taken along the line CC of FIG.

[Explanation of symbols]

 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 20-25 abutment portion 28 projection portion 32 guided portion 33 claw portion 50 transmission housing 50a opening

Claims (1)

[Claims] 1. A striker which is rotatably attached to a shift piston rod and whose tip portion can selectively engage with engagement grooves of a plurality of shifters arranged in parallel in the select direction. In a transmission operating device having a yoke attached to a piston rod and having a tip end engaged with the striker, when the striker shifts into an opening of a transmission housing in which the striker is inserted. The shift stroke of the striker is set to a predetermined value at each shift speed by providing a contact portion that comes into contact with the gear at each shift speed and projecting each of the contact portions toward the center of the opening by a predetermined length. The transmission operation device is characterized in that the optimum shift stroke length is regulated.