JPH0211643Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field The present invention relates to a throttle link device for an automatic transmission.

(B) Prior art The throttle shaft that constitutes the throttle link device of an automatic transmission consists of an outer throttle lever provided outside the automatic transmission and an inner throttle lever provided inside the automatic transmission. It is a member that transmits the rotational force between The outer throttle lever is connected to the throttle of the engine by a linkage or the like, and the inner throttle lever is engaged with the plunger of the throttle valve. The engagement between the inner throttle lever and the plunger is achieved by fitting the inner throttle lever into a groove provided in the plunger, but the positional accuracy of the inner throttle lever must be ensured sufficiently due to the processing method, etc. If this is not possible, a problem will occur in which the inner throttle lever and the groove of the plunger become disengaged. In other words, when trying to specify the position of the inner throttle lever using a relatively imprecise press part in order to reduce the cost,
It becomes difficult to ensure the positional accuracy of the inner throttle lever. If the inner throttle lever and the plunger are disengaged, the automatic transmission will no longer be able to operate normally.

(c) Purpose of the invention The present invention is intended to ensure sufficient positional accuracy of the inner throttle lever when obtaining an inexpensive throttle link device by rotatably attaching the throttle shaft to the valve and valve cover. To provide a throttle link device for an automatic transmission in which an inner throttle lever and a plunger of a throttle valve do not come out of engagement even when the throttle link is not possible.

(d) Structure of the invention The throttle link device for an automatic transmission according to the invention includes a throttle shaft 10 rotatably supported by a case 12 and a valve cover 14 attached to the case, and a throttle shaft 10 rotatably supported by a case 12 and a valve cover 14 attached to the case. An outer throttle lever 26 is fixed to the shaft and interlocks with the engine throttle, and an inner throttle whose tip engages with a throttle valve plunger 34 connected to the throttle shaft and provided on the control valve 13 so as to rotate integrally with the throttle shaft. This is based on a throttle link device of an automatic transmission having a throttle lever 28, and the throttle shaft has a small diameter portion 10b at the tip on the case side.
The throttle shaft also has a large diameter portion 10a adjacent thereto, and the throttle shaft fits the small diameter portion into a hole 12a provided in the case, and also fills the stepped portion between the small diameter portion and the large diameter portion. It is positioned in the axial direction by pressing against the stopper surface of the case,
A spacer 30 is interposed on the outer periphery of the throttle shaft between the valve cover and the inner throttle lever. The control valve is positioned between the spacer and the throttle shaft mounting side of the case, and the engagement between the inner throttle lever and the plunger of the throttle valve is opened toward the case side of the plunger. Groove 34
It is characterized in that it is carried out by fitting the inner throttle lever into the inner throttle lever.

(E) Embodiments Hereinafter, embodiments of the present invention will be described based on FIGS. 1 to 3 of the accompanying drawings.

1 to 3 show a throttle link device for an automatic transmission according to the present invention. Throttle shaft 10
is arranged vertically at the top of the case 12 of the automatic transmission. The small diameter portion 10b at the lower end of the throttle shaft 10 is connected to a hole 12 formed in the case 12.
It is fitted inside a. A valve cover 14 is attached to the case 12 to cover a control valve 13 attached to the upper surface of the case 12. The valve cover 14 is manufactured from a plate material by press working. Valve cover 1
A plug 16 is fixed to the flange portion 14a of 4, and a synthetic resin bushing 18 is attached to the inner diameter of the plug 16. Also, plug 16
An oil seal 20 is attached to the. The throttle shaft 10 is fitted into the inner diameter of the bush 18. Throttle shaft 10 has
A dust cover 22 is attached to cover the top of the plug 16. Also, the throttle shaft 10
An outer throttle lever 26 is secured to the upper end of the throttle lever 26 by a lock nut 24. The outer throttle lever 26 is connected to an engine throttle via a linkage (not shown). An inner throttle lever 28 is provided on the inner side of the valve cover 14 of the throttle shaft 10. The inner throttle lever 28 is connected to the throttle shaft 10 so as to rotate together with the throttle shaft 10. In order to position the inner throttle lever 28 downward in FIG.
This is done by pressing against the stopper surface of No. 2. Also, the first part of the inner throttle lever 28
In the figure, upward positioning is performed by the spacer 30 and the step portion above the large diameter portion 10a. The spacer 30 is connected to the step part above and the plug 1.
6. A torsion spring 32 is provided on the outer periphery of the throttle shaft 10 between the inner throttle lever 28 and the case 12 to apply a return force to the inner throttle lever 28. The lower arm 32a of the torsion spring 32 in FIG. 1 is prevented from rotating by a control valve 13 attached to the case 12, as shown in FIG. The upper arm 32b of the torsion spring 32 in FIG. 1 engages the inner throttle lever 28. As a result, the torsion spring 32 always exerts a counterclockwise force on the inner throttle lever 28 in FIG. The tip of the inner throttle lever 28 engages a groove 34a in a plunger 34 of the throttle valve. The groove 34a is opened downward (ie, toward the case 12) in FIG.

Next, the operation of this embodiment will be explained. The driver's operation of the accelerator pedal is transmitted to the outer throttle lever 26 via a linkage (not shown), and the outer throttle lever 26 rotates about the throttle shaft 10. The rotation of the outer throttle lever 26 is controlled by the throttle shaft 10.
is transmitted to the inner throttle lever 28 via
The inner throttle lever 28 also rotates about the throttle shaft 10. The rotation of the inner throttle lever 28 is transmitted to the plunger 34 of the throttle valve through the groove 34a, and the throttle valve adjusts the throttle pressure according to the amount of movement of the plunger 34. By doing so, a throttle pressure corresponding to the throttle opening of the engine can be obtained. As described above, the positioning of the inner throttle lever 28 in the side direction of the case 12 is performed by the stepped portion on the lower side of the large diameter portion 10a provided on the throttle shaft 10. Since the stepped portion 10a is provided by machining, its positional accuracy in the axial direction is high. Therefore, the positional accuracy of the inner throttle lever 28 in the side direction of the case 12 is high. For this reason, the groove 34a of the plunger 34 is
Even if it is opened laterally, the engagement between the inner throttle lever 28 and the groove 34a will not come off. On the other hand, case 1 of the inner throttle lever 28
Positioning in the direction opposite to 2 is performed by a spacer 30 provided between the large-diameter portion 10a of the inner throttle lever 28 and the upper stepped portion. The positional accuracy of the lower end of the plug 16 is not very good. This is because a press-processed plug 16 is attached to a press-processed valve cover 14. For this reason, the axial dimension of the spacer 30 needs to be slightly shortened to provide some margin. This is because if the axial dimension of the spacer 30 is longer than the dimension between the lower end of the plug 16 and the inner throttle lever 28, the valve cover 14 cannot be reliably attached. Therefore, the spacer 30 has some play in the axial direction. This means that the inner throttle lever 28 also has an upward play in FIG. However, plunger 3
Since the groove 34a of No. 4 is opened downward in FIG. 1, even if the inner throttle lever 28 moves upward, the engagement between them will not be disengaged. That is, the engagement between the inner throttle lever 28 and the groove 34a is always maintained reliably.

(f) Effects of the invention As explained above, the present invention has the above-mentioned configuration, so the device can be made inexpensive by using a press-made valve cover, etc., and the spacer has no play. The inner throttle lever will not disengage from the groove of the plunger even if

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the throttle link device of an automatic transmission according to the present invention, Fig. 2 is a view of the throttle link device of Fig. 1 seen from above, and Fig. 3 is a view taken in the direction of the arrow in Fig. 1. This is a diagram. 10... Throttle shaft, 10a... Large diameter part, 10b... Small diameter part, 12... Case, 13...
...Control valve, 14...Valve cover,
16... Plug, 18... Bush, 20... Oil seal, 22... Dust cover, 24... Lock nut, 26... Outer throttle lever, 2
8...Inner throttle lever, 30...Spacer, 32...Torsion spring, 34...Plunger, 34a...Slot.

Claims (1)

[Scope of Claim for Utility Model Registration] A throttle shaft rotatably supported by a case and a valve cover attached to the case to be rotatable about its axis, and an outer throttle lever fixed to the throttle shaft and interlocked with the engine throttle. and an inner throttle lever whose tip engages a plunger of a throttle valve provided in a control valve and connected to rotate integrally with a throttle shaft. The shaft has a small diameter part at the tip on the case side, and a large diameter part adjacent to this.
The throttle shaft is positioned in the axial direction by fitting the small diameter part into the hole provided in the case and pressing the stepped part between the small diameter part and the large diameter part against the stopper surface of the case. A spacer is interposed on the outer periphery of the throttle shaft between the throttle lever and the inner throttle lever between the spacer and the stepped portion of the large diameter portion of the throttle shaft on the side opposite to the small diameter portion. The control valve is mounted on the throttle shaft mounting side of the case, and the engagement between the inner throttle lever and the plunger of the throttle valve is achieved by inserting the inner throttle lever into a groove that opens toward the case side of the plunger. A throttle link device for an automatic transmission, characterized in that it is operated by fitting a throttle lever.