JPH08324279A - Select device of automatic transmission - Google Patents

Abstract

PURPOSE: To provide a select device of an automatic transmission by which a desired range position can be easily selected. CONSTITUTION: When a select lever integrally formed with an engaging piece to engage with a recess-projection part to regulate a prescribed movement between range positions is moved to a D3 range from a D4 range still in a condition of being moved in the direction for releasing its engaging condition, D4 can be easily recognized at shift time from the P range side by increasing a load to its movement. In the case where it is switched to the D3 range from the P range side, it works well, for example, when the select lever is released in a butted position by moving it in the range changing direction without moving a movable member in the direction for releasing engagement between the engaging piece and the recess-projection part of a fixing member. Therefore, even if range positions are not operated while visually confirming them by an instrument panel or the like, the respective range positions can be selected while sensitively recognizing D4 or D3 according to a desire.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a selector device for an automatic transmission, and more particularly, in an automatic transmission having a plurality of drive ranges with different number of gear stages, the operation of selecting the drive range from the parking range side is improved. It also relates to a selector device for an automatic transmission.

[0002]

2. Description of the Related Art The select position of a select lever for performing a shift operation of a vehicle with an automatic transmission is, for example, a parking range (hereinafter abbreviated as P), a reverse range (hereinafter abbreviated as R), a neutral range (hereinafter referred to as a neutral range). Abbreviated as N) ・ 4
Between 7 ranges: high speed drive range (hereinafter abbreviated as D4), third speed drive range (hereinafter abbreviated as D3), second speed fixed range (hereinafter abbreviated as 2), first speed fixed range (hereinafter abbreviated as 1) There are some that can be switched with. Of these, D4 shifts between 1st and 4th gears at an appropriate time from low speed to high speed.
The range is suitable for beginners, as it enables high fuel efficiency when traveling from general roads to highways.

When such an automatic transmission is of a type in which the select lever is provided on the steering column, generally, an engaging element provided on a movable member integrated with the select lever is provided with an uneven portion corresponding to each range position. The checker (fixing member) provided is engaged by the biasing force of the spring, and the select lever can be freely moved between the N and D4 to D3 ranges, but between the R and P ranges, the N to R range, and the D3 to 2 range.
The range 2 → 1 range is a direction (eg, front) orthogonal to the range changing direction (eg, up / down) against the biasing force of the spring.
The selector lever cannot be moved unless the engagement between the engaging element and the concave-convex portion is released in the state of being moved to.

[0004]

By the way, in the above-mentioned column shift type automatic transmission, a corrugated depression is formed on the circumferential surface, for example, in order to generate a moderation when moving between range positions. A detent mechanism including a detent cam integrally coupled to a movable member and a roller elastically engaged with a corrugated recess of the detent cam is provided. As described above, for example, the P range to the R and N ranges are provided. When moving to the D4 or D3 range via the selector lever, if the selector lever is moved in the range changing direction while the engagement between the engaging element and the uneven portion is released against the biasing force of the spring, It is difficult to intuitively determine which position is in the D4 or D3 range only by the moderation, and in some cases, the position is continuously moved to select the 2 or 1 range. Further, when the range is moved from the P range to the R range, the engaging element and the uneven portion may be engaged to move the select lever in the range changing direction.
Although it surely stops in the range, it can not be stopped easily in the D4 range, so the D3 range is selected with the intention of selecting the D4 range, and there is a problem that the fuel consumption decreases if you drive at high speed without noticing it. there were.
Especially, it is more difficult to notice in a vehicle in which the engine tachometer is not provided on the instrument panel.

The present invention has been devised in order to eliminate such disadvantages of the prior art, and its main purpose is to:
An object of the present invention is to provide a selection device for an automatic transmission that can easily select a desired range position.

[0006]

According to the present invention, there is provided a parking range, a reverse range, a neutral range, a first drive range having a large number of shiftable steps, and a small number of shiftable steps. A fixed member provided with an uneven portion, and a movable member provided with an engaging element that engages with the uneven portion, in order to restrict a predetermined movement between the range positions having the second drive range in this order, A means for elastically urging the engaging member in the uneven portion, and a direction for releasing the engagement between the engaging member and the uneven portion against the urging force of the urging means. A manual operation means for moving the movable member, and in order to move from at least the parking position to another range position, the manual operation means is used to move the movable member in the releasing direction. A selector device for an automatic transmission, which increases the load when the movable member is moved from the first drive range to the second drive range while the movable member is moved in the releasing direction. It is achieved by providing a selector device for an automatic transmission characterized by having:

[0007]

With this structure, when the P range side is switched to the D4 range, the select lever is
It suffices to move the movable member in the range changing direction while moving the movable member in the direction to release the engagement between the engaging element and the concave and convex portion of the fixed member, and separate the movable member at the abutting position.
When switching to the range, the select lever may be moved in the range changing direction without moving the movable member in the direction for releasing the engagement between the engaging element and the concave-convex portion of the fixed member, and released at the position where it abuts.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in detail below with reference to specific embodiments shown in the accompanying drawings.

1 to 4 show the essential parts of a column type selector for an automatic transmission according to a first embodiment of the present invention. This select device is used for the base bracket 2 fixed to the steering column 1.
A select direction rotating member 4 pivotally supported by a support shaft 3 extending parallel to the axis of the steering column, and the rotating member 4
On the other hand, the support shaft 12 orthogonal to the support shaft 3 of the rotating member 4
It has a fork member 5 as a movable member which is rotatably pivoted around and a select lever 6 fixed to the fork member 5. The ball stud 7 provided upright on the rotating member 4 transmits the movement of the select lever 6 to a manual valve (not shown) of the torque converter via a connecting mechanism 8 such as a bell crank.

A checker cam 9 as a fixing member having an unevenness formed on one end surface of the base bracket 2 in the axial direction for restricting the movement of the select lever 6 between ranges.
Has been fixed. The fork member 5 is provided with a pair of claws 10 and 11 as bifurcated engaging elements so as to sandwich the checker cam 9 so as to serve as spring means mounted around the support shaft 12 of the fork member 5. Due to the torsion coil spring 13, the one engaging claw 10 is moved to the checker cam 9
It is always elastically urged in the direction of coming into contact with the uneven surface of. The other engaging claw 11 projects into an opening 2 a provided in the base bracket 2.

A guide groove 14 is provided in a portion of the base bracket 2 adjacent to the checker cam 9 so as to be substantially parallel to the support shaft 12 of the fork member 5. The guide groove 14 has a stopper as a slide member. The key 15 is slidably engaged.

A long hole 16 is provided at one end of the stopper key 15 in a direction orthogonal to the sliding direction of the stopper key 15, and the long hole 16 is one of the connecting members 17 having a substantially triangular shape. The apex T1 is engaged. The second apex T2 of the connecting member 17 is pivotally attached to the base bracket 2 and the third apex T3 of the connecting member 17 is connected to a plunger member 19 which is an operating end of a solenoid 18 fixed to the base bracket 2. The solenoid 18 is linked to a brake (not shown). With these, a shift lock mechanism is configured to prevent a shift change unless the brake is depressed at the time of starting.

On the other hand, a detent mechanism 20 is provided on the other end face in the axial direction of the base bracket 2 so as to give a moderation feeling to the range switching operation. The detent mechanism 20 includes a detent cam 21 having a corrugated recess formed on the peripheral surface thereof and integrally coupled to the rotating member 4, and a detent cam 2.
A roller 23 elastically supported by the base bracket 2 via a leaf spring 22 so as to be engaged with the corrugated depression 1 of FIG.

On the cam surface of the checker cam 9 with which the pawl 9 engages, the most concave surface 24 is provided with a portion corresponding to the D4 range, and the portions corresponding to the N range and the N3 range are one step from the surface 24. High steps 25 and 26 are provided. Further, steps corresponding to the R range and steps corresponding to the two ranges are provided with steps 27 and 28 that are one step higher than steps 25 and 26, respectively, and the steps corresponding to the one range and between the R range and the P range are provided. The higher part has a raised part 2
9.30 is provided. Further, the portion corresponding to the P range forms the most concave portion 31 like the surface 24. Here, as also shown in FIG. 5 in which a main part of the checker cam 9 is enlarged, a slope having an angle θ1 (≦ 30 °) is formed between the surface 24 and the step portions 25 and 26.

The opening 2a into which the engaging claw 10 is inserted has such a size that the engaging claw 11 which is integral with the concave claw 10 can move as the claw 10 moves from the concave portion 31 to the convex portion 29. However, the angle θ2 (≦ 7
The stepped portion 2b having a slope of 0 ° is formed, and the select lever 6 is moved in a direction parallel to the axis of the column against the elastic force of the torsion coil spring 13 that biases the fork member 5. When trying to rotate in the selection direction of the range position as it is, it is caught by the engaging claw 11 and the load is rapidly increased at that position. The position corresponds to the D4 range.

As best shown in FIG. 4, which schematically shows the relationship between the checker cam 9 and the pair of claws 10 and 11 of the fork member 5, the select lever 6 includes the fork member 5 as described above. Since the engaging claw 10 is always elastically urged in the direction in which it comes into contact with the uneven surface of the checker cam 9,
The movement of P → R, N → R, D3 → 2, 2 → 1 cannot rotate the select lever 6 as it is because the engaging claw 10 is caught by each of the steps. Therefore, the select lever 6 is pulled up in the direction parallel to the axis of the column, that is, in the direction orthogonal to the selection direction of the range position, that is, the disengagement, against the elastic force of the torsion coil spring 13 that biases the fork member 5. By moving in the direction, the engaging claw 10 can be passed over each step or convex portion,
P → R, N → R, D3 → 2, 2 → 1 can be switched. The select lever 6 can be moved as it is for R → N, N → D4, 1 → 2 → D3 → D4. Also, D4 → D3, D4 → N
Is moved from the surface 24 to the stepped portions 25 and 26, as described above, because there is a sloping step having an angle θ1.
Compared with the movement of N, N → D4, 1 → 2 → D3 → D4, the force to overcome the step is slightly required, and the position of the D4 range can be easily recognized.

On the other hand, if the select lever 6 is pulled up in the direction parallel to the axis of the column and is to be rotated in the D3 range direction from the P range side, the engaging claw 11 is caught by the stepped portion 2b at the D4 range position. , The load increases rapidly. Here, the step portion 2b is set in a range where the D4 detinto suction force is generated in the detent cam 21 of the detent mechanism 20, and at this position, the select lever 6
Is returned in the direction in which the claw 10 engages with the checker cam 9, the D4 range is selected. In addition, the select lever 6 is rotated with an excessive force, or the select lever 6 is clawed.
Is slightly returned in the direction of engaging the checker cam 9, the engaging claw 11 is disengaged from the stepped portion 2b, and the select lever 6 can be rotated in the D3 to 1 range. Therefore, no complicated operation is required. You can easily select D3-1. Therefore, it is possible to select each range position while sensuously recognizing the D4 or D3 range as desired without observing the range position on the instrument panel or the like and operating it. Needless to say, in the present embodiment, the increase of the load due to the stepped portion 2a does not occur during the rotation in the P range direction from the 1st range side.

FIG. 5 is a view similar to FIG. 4, showing a second embodiment to which the present invention is applied. In this embodiment, a publicly known check ball 40 is provided in place of the step portion 2a of the first embodiment. Therefore, the load increases at the D4 range position not only when the select lever is rotated from the P range side but also when the select lever is rotated from the 1 range side. Other structures are the same as those of the first embodiment.

FIG. 6 is a view similar to FIG. 4, showing a second embodiment to which the present invention is applied. In this embodiment, the present invention is applied to a floor type selector for an automatic transmission, and a lock pin 41 provided on a select lever (not shown) is used in place of a fork member having a pair of claws protruding from it. Are engaged with the guide holes 43 provided in the guide plate 42. On one side of the guide hole 43, a stepped portion 43a corresponding to each range position having the same function as the stepped portions 24 to 31 in the first embodiment is formed, and is directed toward this stepped portion 43a. The lock pin 41 is urged. Further, a step portion 43b having a function similar to that of the step portion 2b in the first embodiment is formed on the side of the guide hole 43 facing the stepped portion 43a. The operation and effect are similar to those of the first embodiment.

[0020]

As described above, according to the present invention, the select lever, which is integrated with the engaging element that engages with the uneven portion that regulates the predetermined movement between the range positions, is moved in the direction to release the engaged state. When the D4 range is moved from the D4 range to the D3 range in the above state, D4 can be easily recognized when shifting from the P range side by increasing the load for the movement. Further, when switching from the P range side to the D3 range, for example, the select lever is moved in the range changing direction without moving the movable member in the direction of releasing the engagement between the engaging element and the concave and convex portion of the fixed member. Just release it at the position where it hits. Therefore, each range position can be selected as desired while sensuously recognizing D4 or D3 without operating the range position while visually recognizing the range position on the instrument panel or the like.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a column type selection device for an automatic transmission according to a first embodiment to which the present invention is applied.

FIG. 2 is a cross-sectional view of a main part of the lock mechanism seen from the back side of FIG.

FIG. 3 is a cross-sectional view of a main part of the detent mechanism as viewed from the back side of FIG.

FIG. 4 is a diagram schematically and linearly showing the relationship between the checker cam and the pair of claws of the fork member of FIG.

FIG. 5 is a view similar to FIG. 4 showing a main part of a column type selection device for an automatic transmission according to a second embodiment to which the present invention is applied.

FIG. 6 is a view similar to FIG. 4 showing a main part of a floor type selection device for an automatic transmission according to a second embodiment to which the present invention is applied.

[Explanation of symbols]

 1 Steering Column 2 Base Bracket 2a Opening 2b Step 3 Support Shaft 4 Select Direction Rotating Member 5 Fork Member (Movable Member) 6 Select Lever (Manual Operation Means) 7 Ball Stud 8 Coupling Mechanism 9 Checker Cam (Fixing Member) 10 Engagement Synthetic claw (engager) 11 Lock claw 12 Support shaft 13 Torsion coil spring 14 Guide groove 15 Stopper key 16 Long hole 17 Connecting member 18 Solenoid 19 Plunger member 20 Detent mechanism 21 Detent cam 22 Leaf spring 23 Roller 24 Surface 25-28 steps Part 29, 30 Convex part 31 Recessed part 40 Check ball 41 Lock pin 42 Guide plate 43 Guide hole 43a Stepped part 43b Step part

Claims (3)

[Claims] 1. A predetermined range between range positions having a parking range, a reverse range, a neutral range, a first drive range having a large number of gear steps and a second drive range having a small number of gear steps in this order. In order to regulate the movement of the concave and convex portions, a fixed member provided with an uneven portion, a movable member provided with an engaging element that engages with the uneven portion, and an elastic force in a direction to engage the engaging element with the uneven portion Urging means, and a manual operation means for moving the movable member in a direction to release the engagement between the engaging element and the concave and convex portion against the urging force of the urging means, at least the A selector device for an automatic transmission, which is indispensable to move the movable member in the releasing direction by the manual operation means in order to move from the parking position to another range position, Select device for an automatic transmission, characterized in that it comprises a means for increasing the load during movement of the rotary members from said first drive range in a state of being moved in the release direction to the second drive range. 2. The load increasing means of the movable member contacts the engaging element when moving from the first drive range to the second drive range in a state where the movable member is moved in the releasing direction. The select device for an automatic transmission according to claim 1, wherein the select device comprises a step portion that is in contact with the step portion. 3. A predetermined load is generated when the movable member is moved from the first drive range to the neutral range and when the movable member is moved from the first drive range to the second drive range. Between the first drive range and the neutral range of the uneven portion, and between the first drive range and the second range.
The selection device for an automatic transmission according to claim 1 or 2, further comprising a step portion between the drive range and the drive range.