JPS6214449Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotation prevention device for an interlock plate in a shift operation mechanism of a manual transmission for a vehicle.

First, an example of a conventional speed change operation mechanism will be described with reference to FIGS. 1 and 2. In FIG. 1, which shows the speed change operation mechanism in cross section, a shift and select lever shaft 1 is slid in the axial direction by a select operation of a shift lever (not shown), and an inner lever 2 on the lever shaft 1 is moved to one of the shift heads 3 to 3. 5 and is rotated by the shift operation of the shift lever to move the selected shift head (upward or downward in FIG. 2), thereby shifting multiple forward and reverse gears. It is becoming possible to obtain it. The interlock device installed in this shift operation mechanism has an interlock plate 6 attached to the shift and select lever shaft 1 so as to be relatively rotatable, and lock pieces 7 and 7 formed oppositely at the bottom of the lock plate 6. is shift head 3~5
Of these, it engages with the two shift heads that are not selected by the inner lever 2, holds both shift heads in an immovable state, and prevents simultaneous shifting to two gears (double shift). (See Figure 2). Thus, the lock pin 11 at the tip of the lock bolt 10 screwed into the bolt hole 9a in the upper part of the transmission case 9 is inserted into the elongated long hole 8 on the upper surface of the interlock plate 6, and the interlock plate 6 is closed. The shaft is movable along with the shift and select lever shaft and is prevented from rotating. The transmission mechanism includes a shift and select lever shaft 1, an inner lever 2, an interlock plate 6, a fixed lever 12,
13, boots 14, spring seat 15,1
6, springs 17, 18, snap spring 1
9, 20, slotted spring pin 21-2
3. After arranging control system members such as the oil seal 24 and the control shaft cover 25 forming a part of the transmission case 9 to form a control assembly, this assembly is assembled into the transmission case 9. After this assembly, the lock bolt 10 was screwed into the bolt hole 9a of the transmission case 9 so that the lock pin 11 was engaged with the elongated hole 8 of the interlock plate 6.
For this reason, there is a risk of oil leaking from the screwed portion between the lock bolt 10 and the bolt hole 9a of the transmission case 9, and it is necessary to take measures to prevent oil leakage. Furthermore, since the interlock plate 6 in the control assembly when assembled to the transmission case 9 is in a state where it can freely rotate relative to the shift and select lever shaft 1, the interlock plate 6 for the shift heads 3 to 5 when assembled is 6 is difficult to position, resulting in a decrease in assembly work efficiency and the occurrence of incorrect assembly.

Therefore, the purpose of this invention is to eliminate oil leakage, which is a drawback of the conventional method in which the interlock plate is prevented from rotating with a lock bolt, and to improve the workability of assembling the control assembly to the transmission case. It is an object of the present invention to provide a rotation prevention device for an interlock plate that can prevent incorrect assembly.

In order to achieve the above-mentioned object, this invention includes a protruding piece protruding from the inner wall of the control shaft cover included in the control assembly, and an interlock plate and control which are arranged to be relatively rotatable on the shift and select lever shaft. The protruding piece of the shaft cover is connected to the protruding piece of the shaft cover by the engagement means of the elongated hole and the engagement protrusion, thereby eliminating the conventional locking bolt and preventing the interlock plate from rotating in the assembled state and after assembly.

An example of this invention is shown below in Figures 3 and 4.
This will be explained according to the diagram. In addition, since this example is a partial improvement of the above-mentioned conventional example, the same parts as the conventional example are given the same reference numerals, and the explanation thereof will be omitted.
Different configurations will be detailed. A projecting piece 27 is provided on the upper part of the inner wall 26 of the control shaft cover 25 so as to be located above the interlock plate 6. A pin-shaped engagement protrusion 28 is protruded from the lower surface of the tip of the protrusion piece 27 . This engaging protrusion 28 is engaged with the elongated hole 8 of the interlock plate 6, so that the lock plate 6 is able to move axially together with the shift and select lever shaft 1 and is prevented from rotating. Note that, unlike the conventional case, no lock bolt is screwed into the transmission case 9, and no bolt hole is formed.

According to the above configuration, the shift and select lever shaft 1 includes the inner lever 2, the interlock plate 6, the control system members 12 to
24 and the control shaft cover 25 to form a control assembly, the engagement protrusion 28 of the protruding piece 27 of the control shaft cover 25 is engaged with the elongated hole 8 of the interlock plate 6, so that the interlock plate 6 is prevented from rotating. By assembling this control assembly to the transmission case 9, the same transmission function as the conventional one can be obtained.

As shown in FIG. 5, the means for engaging the elongated hole 8 of the interlock plate 6 in the above embodiment with the engaging protrusion 28 of the projecting piece 27 of the control shaft cover 25 is such that the elongated hole 8 is connected to the control shaft cover. 25 on the protruding piece 27 and the engaging protrusion 28
It is also possible to protrude from the upper surface of the interlock plate 6 and engage in the elongated hole 8 thereof.

That is, this invention includes a protruding piece that protrudes from the inner wall of a control shaft cover included in a control assembly, and an interlock plate and a protruding piece of the control shaft cover that are arranged to be relatively rotatable on the shift and select lever shaft. are connected by the engagement means of the elongated hole and the engagement protrusion, thereby preventing the interlock plate from rotating.This eliminates the need for a conventional lock bolt, and also prevents the interlock plate from rotating in the assembled state and after assembly. By stopping the control assembly, it is possible to eliminate oil leakage compared to the conventional case, improve the workability of assembling the control assembly to the transmission case, and prevent incorrect assembly.

[Brief explanation of drawings]

1 and 2 show a conventional example. FIG. 1 is a cross-sectional view of a gear shifting mechanism of a manual transmission, and FIG.
The figure is a schematic plan view showing the relationship between the interlock plate and the shift head, and Figures 3 and 4 show one embodiment of this invention, where Figure 3 is a cross-sectional view of the gear shift mechanism, Figure 4 is a side view showing the relationship between the interlock plate and the control shaft cover, and Figure 5 is a side view showing a modified embodiment of this invention. 1...Shift and select lever shaft,
2...inner lever, 3-5...shift head,
6: Interlock plate; 8: Long hole; 9:
... transmission case, 12 to 24 ... control system members, 25 ... control shaft cover,
26: inner wall; 27: protruding piece; 28: engaging projection; 8, 28: engaging means.

Claims (1)

[Scope of utility model registration request] This is a type of manual transmission in which the gear position of a manual transmission is changed by the shift head selected by the sliding movement of the select lever shaft being shifted by the rotation of the same lever shaft. In a transmission operation mechanism equipped with an interlock device mainly consisting of an interlock plate to keep the transmission in an immovable state, the control shaft is disposed on the shift and select lever shaft and forms part of the transmission case. A protruding piece is provided on the inner wall of the cover, and the interlock plate, which is arranged to be relatively rotatable on the shift and select lever shaft, and the protruding piece of the control shaft cover are connected to the elongated elongated hole and the engagement protrusion. 1. An interlock plate rotation prevention device characterized in that the interlock plate is interlocked with the shift and select lever shaft by an engagement means, and the interlock plate is prevented from rotating while being movable along the shaft with the shift and select lever shaft.