JPS59206918A - Speed selecting mechanism of automatic transmission - Google Patents

Abstract

PURPOSE:To increase the force required for making D-2 shift to an extent which is equal to or less than a specific % from the force required for making N-D shift, by setting the inclination of the section from the D (drive) position of a detent lever to the 2 position more steeply than the inclination of the section from the N (neutral) position to the D position. CONSTITUTION:A detent mechanism 3 has a plate-like shape which is fixed to one end of a shift lever shaft 21 and makes rotation around the shaft 21, and, at the outer periphery which is the acting margin of the mechanism 3, notches p, r, n, d, s, and l corresponding to the setting position P, R, N, D, S, and L of a shift lever are continuously installed. The inclination 37 of the section at the notch (d) side between the notches (d) and (s) of a detent lever 31 is set more steeply than the inclined line 39 of the section at the notch (n) side between the notches (n) and (d) and, therefore, force which is 15-50% stronger than the force required for shifting the shift lever from the N position to the D position, is required when the shift lever is moved from the D position to the S position. As a result, wrong shifting of the shift lever from the N position to the S position through the D position can be prevented, because a considerable reaction can be felt before the shift lever moves from the D position to the S position.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmission mechanism for selecting a transmission range by operating a manual shift lever in an automatic transmission for a vehicle.

In a vehicle equipped with an automatic transmission, a floor type or column shift lever is provided. For example, in the case of a transmission with 3 forward speeds or 4 forward speeds, the shift 1 lever has the setting positions P, R, N, D12mat=S1L or 1
The gear shift range is selected as shown in Table 1.

Table 1 The shift lever also has a stopper mechanism to avoid erroneous operation, and shifting from N to D can be done by a single operation such as pulling the shift lever in the =h direction, but from N to P, R, 2 or When shifting to 1-, a floor type requires a push-in button or lever, while a column type requires a so-called redundant operation, in which the shifter is pulled up while pulling the shift lever towards you, which improves safety. I'm here. In addition, the shift lever can be shifted from D to 62 with a single operation, which improves the operability of the shift lever when it is necessary to frequently switch from D to 2 ranges, such as when driving on a hill with many ups and downs. Automatic transmissions with a dual-type system are also manufactured. However, in the former case, it becomes troublesome to shift from D to 2, and in the latter case, when the N-D shift is 1, there is too much momentum and the shift is N-D.
-2 shift is likely to occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide a speed selection mechanism for an automatic transmission that allows a D-2 shift with a single operation and prevents an N-+D→2 shift during an N-D shift.

The speed selection mechanism of the automatic transmission of the present invention includes a shift lever mechanism that allows shifting to N, D, and 2 shift positions with a single operation of the shift lever, and a shift lever mechanism that is linked to the operations of shift 1 to shift levers. A detent lever is connected to a notch for rotationally driven and stably stopped corresponding to each shift position, and a pressing force is applied to the detent lever in the direction of the notch to move the detent lever to each notch. In the speed selection mechanism of an automatic transmission equipped with a detent mechanism having a detent spring for stably stopping the detent lever at the position, the slope between the notch at the D position and the notch at the 2nd position of the detent lever is set at the N position. The slope is steeper than the slope between the notch at the D position and the notch at the D position, so that the force required to operate the shift lever in the D-2 shift is 15 times lower than the force required to operate the shift lever in the N-D shift. %
An increase of 50% or less is called a configuration.

Next, the present invention will be explained based on embodiments shown in the drawings.

The figure shows the configuration of the floor shift two speed selection mechanism, where 1 is the shift lever mechanism, 2 is the shift lever shaft 5-mechanism, 3 is the detent mechanism, 4 is the parking mechanism, and 5 (
The hydraulic control device 6 for the automatic transmission is a push cable, which is a rolled wire, connected to the control 1 to link the shift lever mechanism 1 and the shift lever shaft mechanism.

The shift 1 to lever mechanism 1 is pivotally connected to the vehicle body at an intermediate portion 110, a T-shaped handshake 111 is provided at the head, and a shift lever 11 connected to one end 61 of the push-pull cable 6 is provided at the lower end 112. , a display board 12 for clearly indicating the set positions of the shift levers 1 to 1, and a stopper mechanism 13 for stopping the shift lever 11 at a predetermined position.

The stopper mechanism 13 is disposed parallel to the working surface of the shift lever 11, and is located at the N and D sides of the shift lever 1.

Smooth arc-shaped intermediate continuous portion 1 corresponding to each position of S
31△, front glasses of the intermediate continuous portion 131A (cloth side shown)
8 parts 131B are connected via a step 131a to correspond to the R position of the shift lever 1, and in front thereof are connected to each other via a step 131b and correspond to the P position of the shift lever 1. 8 portion 131C, and the intermediate connecting portion 1
An operating edge 1 consisting of a portion 131D that is connected to the rear of 31A via a step 131d and corresponds to the 1st position of the shift lever.
31, and a guide plate 132 provided on the shift lever 12 so as to be in sliding contact with the working edge 131.
1, and a locking pawl 135 that is disposed above the intermediate fulcrum 110 of the shift lever and moves upward when a button 115 provided on the handshake 111 of the shift lever is pressed.

The shift lever shaft mechanism 2 includes an automatic transmission case 10
The shift lever shaft 21 is rotatably supported by the shift lever shaft 21, its tip end is connected to the other end 62 of the cable 6, and its rear end has an outer lever 22 fastened to one end of the shift lever shaft 21.

The detent mechanism 3 has a plate shape that is fixed to the other end of the shift lever shaft 21 and rotates integrally around the shift lever shaft 21. The detent mechanism 3 has a plate shape that is fixed to the other end of the shift lever shaft 21 and rotates integrally around the shift lever shaft 21. ,D.

2. Notches p, r, n, d, s corresponding to each of L.

a detent spring 35 having one end 32 fixed to the automatic transmission case and a roller 33 attached to the other end, the roller 33 being pressed against the working edge of the detent lever. Become.

The parking mechanism 4 includes a rod 4 whose one end is connected to the detent lever 31 and is displaced in conjunction with the rotation of a shift lever shaft, which is a support shaft of the detent lever 31.
1. A cam 4 provided at the other end (tip) of the rod 41
2. A hub with a bracket, in which a cylindrical part that supports the tip of the rod when the tip of the rod is inserted between the cam and a parking pole to be described later is connected and extended from the cam surface. 43, a parking pole 45 equipped with a pawl 44 that meshes with the parking gear; a spring 4 that biases the parking pole 44 toward release from parking;
6. Parking gear 4 fixed to the output shaft of the automatic transmission
It consists of 7.

The hydraulic control device 5 includes a manual valve 51 connected to the detent lever and the rod 36, and a valve body 50 provided with a hydraulic control circuit consisting of other valves.

In the present invention, the detent lever 3 of the detent mechanism 3
1, as shown in FIG. 2, the sloped edge 37 along the notch d between the notches d and S is compared to the sloped edge 39 along the notch 0 between the notches n and d. It is said to have a steep slope,
Therefore, operating the shift lever requires a force that is 15% stronger than the operating force required for an N-D shift. For this reason, when an ND shift is performed, there is a considerable response before the D-2 shift, and an ND-2 shift is prevented.

In addition, when operating the shift lever, the operating force for D-2 shift is 15% more than N-D shift because if it is less than this, the response will be too little and there will be many cases where N-D-2 shift will be performed. Therefore, the reason why the increase is set to be less than 50% is because if it is more than this, the operating force of the D-2 shift becomes too large and the shift touring 9- deteriorates.

As described above, the speed selection mechanism of the automatic transmission of the present invention has N, D,
The shift lever mechanism allows shifting to each shift position in 2 by a single operation of the shift lever, and when the shift lever is rotated in conjunction with the operation of the shift lever, it becomes stable corresponding to each shift position. A detent mechanism includes a detent lever connected with a notch for stopping the detent lever, and a detent spring for applying a pressing force in the direction of the notch to the detent lever to stably stop the detent lever at each notch position. In the speed selection mechanism of an automatic transmission equipped with The slope is steep, which reduces the force required to operate the shift 1 lever in the D-2 shift to N-D.
15 from the force required to operate the shift lever during shifting
% or more and 50% or less, it is possible to perform a D-2 shift by 10% in a single operation, and prevent N→D→2 sea nodes during an N-D shift. Furthermore, since the N-D-2 shift 1~ is prevented by changing the shape of the notch of the Deten 1~ lever, the increase in cost is extremely small.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the configuration of a speed selection mechanism of an automatic transmission according to the present invention, FIG. 2 is a plan view of a detent I mechanism and a parking mechanism, and FIG. 3 is a side view of the parking mechanism. In the figure 1... Shift lever mechanism 3 River Teten 1 machine 1 31... Deten 1 - Lever 32... Deten 1 - Spring l, S, d, n, r, p... Notch = 11 - Figure 1 Figure 2 3 33 35 Figure 3 5

Claims (1)

[Scope of Claims] 1) A shift lever mechanism that allows shifting to each of the NSD and 2 shift positions by a single operation of the shift lever; A detent lever to which notches are connected in order to stably stop the detent lever in accordance with the position, and a pressing force applied to the detent lever in the direction of the notch to stably stop the detent lever at each notch position. In the speed selection mechanism of an automatic transmission equipped with a detent mechanism having detent 1 to spring, the inclination from the notch at the D position of the detent lever to the notch at the 2nd position is determined from the notch at the N position to the D position. The slope is steeper than the slope between the two notches, thereby reducing the force required to operate the shift lever in the D-2 shift by 15% of the force required to operate the shift lever in the N-D shift.
A speed selection mechanism for an automatic transmission, characterized in that the speed is increased by 50% or less.