JPS6151697B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmission drive device for a vehicle,
In particular, the present invention relates to a transmission drive device for a vehicle suitable for use in an automatic transmission.

Recently, automatic vehicles have been developed and put into practical use in automobiles, especially passenger cars. In such an automatic vehicle, for example, when the shift lever is shifted from the N range (neutral position) to the D range (drive position) in order to start the vehicle, the clutch is automatically turned off, and then the transmission is turned off. First gear is selected. When the accelerator pedal is depressed from this state, the amount of depression of the accelerator pedal is detected, the clutch is automatically turned on, and the vehicle starts moving. Furthermore, in such an automatic vehicle, gear shifting operations are performed automatically while the vehicle is running. That is, the electronic control unit built into the automatic vehicle stores automatic shift line patterns for the D range, first range, second range, and third range of the shift lever, respectively. The 1st speed and 2nd speed are divided by the automatic shift line pattern.
If an operating point enters each of the speed and third speed ranges from another range, this is detected and a gear change operation is automatically performed. The automatic transmission of this type of automatic vehicle is
It is a combination of an automatic clutch and an automatic transmission, and various types have been developed, but those that combine a torque converter and a planetary gear type transmission are mainly used. However, planetary gear type transmissions are complicated to manufacture and require a lot of effort to assemble. Moreover, the structure of this planetary gear type transmission is different from the conventional manually operated parallel shaft gear type transmission, so conventional production lines cannot be used.
A new production line must be used. Therefore, it has the disadvantage that it is more expensive than a parallel shaft gear type transmission. In addition, some parallel shaft gear type transmissions are controlled using a fluid control system.
This has disadvantages in that it has a complicated structure, is large in size, is expensive, and is not easy to incorporate into a transmission.

Therefore, an object of the present invention is to provide a transmission drive device that can use a widely used parallel shaft gear type transmission in an automatic transmission, has a simple structure, is small in size, and is easy to incorporate into the transmission. There is something to do.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a configuration diagram of an embodiment of the present invention, and FIG. 2 is a sectional view taken along line A-A of the configuration shown in FIG. 3a is a potentiometer that detects and outputs the rotation of the output shaft 3, that is, the rotation of the motor 1; 5 is a motor control circuit that controls the command CD and the potentiometer; The motor 1 is controlled by the output of the meter 3a. Reference numeral 6 denotes a disc-shaped driver whose rotation center is fixed to the output shaft 3, and which drives rollers 7a and 7b with a phase of 180°.
is rotatably mounted, and annular portions 6a and 6b are mounted at an angle of 90° to be symmetrical about the center of rotation. 8 is a wheel, the roller 7 of the driver 6
grooves 9a and 9b that engage with the grooves a and 7b, and the driver 6
Notches 8 for engaging with the annular portions 6a, 6b of
a, 8b, 8c, and the rotation of the wheel 8 is based on the axis 1.
It is taken out by 2. The driver 6 and wheel 8 configured in this manner constitute a Geneva mechanism. Reference numeral 10 denotes a drive shaft, which is supported so as to be movable in the axial direction of the casing 20, and a pair of spring receivers 25 and 26 are fixed thereto. 11 is the drive shaft 10
13 is an arm which is rotatable around a shaft 12, and a fixing pin 14 is provided at a position at a radius LW from the center of rotation. A roller 15 rotatably fitted to 14 is provided. The operating range of the arm 13 is such that it can move 90 degrees left and right with respect to the position perpendicular to the axis of the drive shaft 10, and the roller 15 is engaged with the groove 11.
The movement of the arm 13 causes the drive shaft 10 to move left and right. Reference numeral 21 denotes a slider, which is slidably fitted onto the drive shaft 10, whose rotation in the rotational direction is restricted by a detent 27, and which has an engaging portion 2 at its lower end.
It has 1a. 23 and 24 are springs,
Spring receivers 25 and 26 of drive shaft 10 and slider 21
provided in between. 28 is a rotation stopper for the drive shaft 10.

A swing lever 30 rotates around a shaft 31, one end of which engages with a shift block 41 of a shift rod 40, which will be described later, and the other end of which engages with an engagement groove 21a of the slider 21, thereby controlling the linear movement of the slider 21. is transmitted to the shift rod 40. 4 denotes a transmission, which is equipped with three shift rods 40 having the aforementioned shift blocks 41 arranged in parallel (see Fig. 2);
Each shift rod 40 is provided with three notches 42a, 42b, 42c so as to be fixed in three positions, and a ball 4 engages with each notch 42a-42c.
3 is attached to the transmission case via a spring 44. The distance L between each notch is the arm 1 described above.
It is chosen to be the same as the length of the displacement LW of No. 3.

Next, we will discuss the configuration of the select direction drive mechanism in the second section.
To explain with a diagram, FIG. 2 is a sectional view taken along the line A-A in FIG. Furthermore, a catch seat 31a is provided at the left end. 51 and 52 are solenoids, respectively, and the shaft 3
1, and when an electrical signal is applied to each shaft 3
1 to the left or right. 54 is a spring that is provided between the inner wall of the casing 20 and the seat 31a and presses the seat 31a in the right direction;
5 and 56 are slide rings which are inserted into the shaft 31 and are moved by the spring 53 to the seats 31b and 3, respectively.
It is pressed against 1a. Slide ring 5
5 and 56 are placed apart by a distance γ, and each slide ring 55 and 56 is in contact with the stopper portions 20a and 20b of the casing 20, respectively. Therefore, when the solenoid 51 is energized and the shaft 31 is driven rightward, the slide ring 56 also moves and compresses the spring 53, causing the shaft 31 to move rightward until the slide rings 55 and 56 come into contact. In this position, one end of the swing lever 30 is engaged with the shift block 41c of the shift rod 40c. On the other hand, when the solenoid 52 is energized, the shaft 3
1 is driven to the left, the slide ring 55 moves and compresses the spring 53, and the slide ring 5
The shaft 31 moves to the left until 5 and 56 come into contact. In this position, one end of the swing lever 30 is connected to the shift block 41c of the shift rod 40c.
is engaged in. And each solenoid 51, 52
When the excitation is removed, the compressed spring 53
With the restoring force, the state shown in Figure 2, that is, swing lever 3
0 returns to the state in which one end of the shift rod 40b is engaged with the shift block 41b of the shift rod 40b.

Next, the operation of such a configuration will be explained with reference to the shift pattern diagram in FIG.

In FIG. 3, the left and right direction of the figure is the select direction, the right direction is SEB, the left direction is SEA, the up and down direction of the figure is the shift direction, the upper direction is SHA, and the lower direction is SHB. In the figure, 1, 2, 3,
4 and 5 are forward gear positions, R is reverse gear position,
N ₁ , N, and N ₂ are assumed to be in neutral positions and are normally in the neutral "N" position.

Now, the case of shifting from the neutral "N" position to the forward gear position "1" will be explained. As is clear from FIG. 3, it is sufficient to move it in the selection direction SEA, shift it to the "N ₁ " position, then move it in the shift direction SHA, and shift it to the "1" position.

First, operate the select drive mechanism shown in Figure 2,
Select the "N ₁ " position. For this reason, solenoid 5
When the shaft 3 is energized, the spring 53 is compressed and the shaft 3 is energized.
1 to the left. When the slide ring 56 moves and reaches the moving distance γ, the slide rings 55 and 56 come into contact and all the force of the solenoid 52 is received by the stopper part 20b, so it stops at this position and the "N ₁ " position is reached. selected. That is, one end of the swing lever 30 is engaged with the shift block 41a of the shift rod 40a.

Next, operate the shift drive mechanism shown in Fig. 1,
Select the "1" position. That is, when a setting input corresponding to one step is given as a shift command CD, the motor 1 rotates, and the output shaft 3 of the reduction gear 2 rotates. Here, if the output shaft 3 rotates counterclockwise, the driver 6 is rotated in the same direction. Since the roller 7b of the driver 6 is engaged with the groove 9a of the wheel 8, the counterclockwise rotation of the driver 6 causes the wheel 8 to rotate clockwise. When the driver 6 rotates 90 degrees, the roller 7b of the driver 6 and the groove 9a of the wheel 8 are disengaged. After this, the annular portion 6a of the driver 6 is connected to the notch 8 of the wheel 8.
Since the wheel 8 is fitted into the shaft 12, the wheel 8 will not rotate in the reverse direction even if torque is applied from the shaft 12. For this reason,
When the potentiometer 3a detects that the driver 6 has rotated 90 degrees, the control circuit 5 stops the motor 1, but even if the motor 1 subsequently moves and stops, the shaft 12 maintains its position. Therefore, regardless of the positioning accuracy of motor 1, axis 1
The positioning accuracy of 2 can be guaranteed. In this way, when the shaft 12 rotates 90 degrees clockwise,
Since the arm 13 also rotates 90 degrees clockwise, the roller 15 moves the drive shaft 10 to the right by a distance LW. Due to this movement of the drive shaft 10, the spring 24 that engages with the spring receiver 26 is compressed, the spring 23 is expanded, and the slider 21 receives a force in the right direction, but until the synchromesh mechanism on the transmission side synchronizes. , since a large force is acting on the shift rod 40a, it cannot move and only compresses the spring 24. Shift rod 40 like this
When a large force is applied to a, the synchromesh mechanism eventually synchronizes and the gears mesh, causing the force to suddenly decrease. Therefore, the slider 21 is pushed by the spring 24 and moves rapidly to the right, so the swing lever 30 engaged with the engagement groove 21a of the slider 21 is rotated about the shaft 31, and the shift rod 40a is moved to the left. Make it work. shift rod 4
When the shift rod 0a moves leftward by L from the neutral position, the ball 43 that was engaged with the notch 42b engages with the notch 42c, so that the shift rod 40a is held in position. At this time, the forces of the springs 23 and 24 are balanced, and the force that displaces the slider 21 in the axial direction becomes zero.

In this way, the switching from the "N" position to the "1" position is completed. The switching operation to other positions is also performed in a similar manner, so a description thereof will be omitted.

In this way, the desired shift rods 40a to 40c are selected by the selection direction drive mechanism,
A selected shift rod is moved by the shift direction drive mechanism to perform a speed change operation.

According to this embodiment, since the Geneva mechanism is used as the rotation-linear motion conversion mechanism of the shift direction drive mechanism, the drive shaft can be accurately displaced by the distance L, and the motor does not overshoot after the end of the step. This also does not affect the positioning accuracy of the drive shaft. Therefore, even if the control circuit is simple and inexpensive, highly accurate positioning is possible. Moreover,
The select direction drive mechanism uses a 3-position stop mechanism with a combination of two solenoids and a spring to improve positioning accuracy, reduce the required power, and also to draw a shift pattern within the drive device. This is designed to ensure interlock.

Moreover, according to this embodiment, the installation on the transmission is completed by simply placing the drive device covered with the casing 20 on the transmission 4, making assembly easy, and consideration is given to eliminating the need for adjustment work after assembly. has been done.

As explained above, according to the present invention, a drive mechanism is provided that drives the swing lever that engages with and drives the shift block of the shift rod in the select direction and the shift direction, and the select direction drive mechanism includes the shaft of the swing lever. The shift direction drive mechanism is configured to rotate the swing lever using a Geneva mechanism and an arm mechanism as a motion conversion mechanism that converts the rotational motion of the motor into linear motion. Therefore, in addition to the effect that the parallel shaft gear type transmission can be used in an automatic transmission, there is also an effect that the drive source can be small, and miniaturization is possible. Further, the Geneva mechanism and the arm mechanism provide high positional accuracy, and also have the effect that highly accurate positioning is possible without being affected by the stopping accuracy of the motor.

Furthermore, since the drive device is configured to draw a shift pattern, it is easy to attach the drive device to the transmission, the workability is good, and there is no need for adjustment work after assembly.

Although the present invention has been explained using one example, the present invention is not limited to the above-mentioned example, and various modifications can be made in accordance with the gist of the present invention, and these are excluded from the scope of the present invention. isn't it.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line A-A of the configuration shown in FIG. 1, and FIG. 3 is a shift pattern diagram for explaining the present invention. In the figure, 1...motor, 6...driver, 8...
Wheel, 10... Drive shaft, 11... Drive pin,
12...Cam follower, 21...Slider, 2
3, 24...Spring, 30...Swing lever, 31...Shaft, 40...Shift rod, 51,
52... Solenoid, 55, 56... Slide ring, 53, 54... Spring.

Claims (1)

[Claims] 1. A swing lever that rotates around an axis, a select direction drive mechanism that moves the swing lever in the axial direction, and a shift direction drive mechanism that drives the swing lever in the rotational direction, One end of the swing lever is engaged with a shift rod, the select direction drive mechanism includes a solenoid that drives the shaft of the swing lever in the axial direction, and the shift direction drive mechanism is driven by a motor and the motor. and an arm mechanism provided on the output shaft of the Geneva mechanism to drive a drive shaft in the axial direction, and drive the swing lever in the rotation direction by driving the drive shaft in the axial direction. A transmission drive device characterized by: 2. A spring receiver is fixed to the drive shaft, and a slider that slides using the drive shaft as a guide and engages with the other end of the swing lever, and a spring is provided between the spring receiver and the slider. A transmission drive device according to claim 1. 3. The transmission drive device according to claim 1 or 2, wherein the Geneva mechanism is configured to advance one step at 90 degrees. 4. The transmission drive device according to claim 1, 2, or 3, wherein the shift direction drive mechanism is located above the select direction drive mechanism.