JPS62237148A - Drive control device for speed change gear for vehicle - Google Patents

Abstract

PURPOSE:To reduce the number of position switches so as to improve reliability of the control device in the caption, by constituting an interlocking mechanism which makes a predetermined output when all of rods provided with shift forks fixed thereto are in their neutral positions, and detecting said output by a position switch. CONSTITUTION:If, for an example, a rod 2b is shifted to switch a shift fork 12b from the neutral position to 1st speed, balls 50, 48 of a displacement member 41 will come in contact with the side wall of said rod 2b, and at the same time, a ball 46 fits in the recess 38a of a rod 2a and another ball 52 in the recess 39 of a rod 2c both becoming unable to come off easily, thus said rods 2a, 2c being fixed in the respective neutral positions. At this time, the displacement of said ball 48, the amount shown as beta, is transmitted to a ball 43 through a pin 47, said ball 46, and another pin 45, displacing it upward against the force of a spring 44. This upward displacement causes a position switch 16 to output a signal which is reverse to the signal outputted when all of said rods are in their neutral positions. Due to the above construction, the number of position switches to detect the neutral positions can be decreased, while the reliability of the operation being increased.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a drive device for changing gears in an automobile transmission.

(Prior Art) This type of automobile transmission has two hydraulic cylinders that move internal levers in two directions perpendicular to each other, the shift direction and the select direction, and an electromagnetic cylinder that switches the direction of the hydraulic pressure of the hydraulic cylinders. It is already known to have an operable directional switching valve and to automatically control the directional switching valve via a control circuit.

As the direction in which the internal lever is operated in the select direction and the shift direction, for example, the patent application filed by the applicant in 1973
No. 7-59078 (Japanese Unexamined Patent Publication No. 177725/1983)
However, in this case, the select direction is fixed to the rod of the select actuator and is moved, but the shift direction is performed by rotating the internal lever with the center of the internal lever using the select actuator rod as a fulcrum. method is adopted.

Therefore, since the rod of the select actuator is used as a fulcrum during shifting, a large force is applied to the rod, causing a problem in durability.

In order to solve this problem, the applicant subsequently applied for
No. 116559 was proposed. This device has a plurality of differential shift cylinders arranged in parallel, each output lot of shift 1 to cylinder is provided with an engagement lever, and each engagement lever is connected to the case of an automobile transmission. They were inserted through holes and engaged with the shift hawks, and these operating devices were installed on the top of the transmission case.

However, with this method, the operating device is installed on the top surface of the transmission case, and this part must be located inside the vehicle interior, which causes the interior of the vehicle to become narrow.

Therefore, in this invention, the applicant proposed Japanese Patent Application No. 60-273998 in order to eliminate the problem of the transmission case being protruded from the upper surface of the transmission case and to reduce the size of the transmission case.

In this case, a plurality of rods are slidably arranged in the case of the transmission, and the rods are moved by nine shift cylinders provided in the case, and the sliding rods of the transmission are moved by the rods. It has a structure with a shift hawk that moves the gears. That is.

A rod that is slidably installed in the transmission case is moved by a shift cylinder installed at the end of the rod, and the shift fork is moved accordingly to change the speed.The shift cylinder is installed inside the case. Therefore, it does not protrude as compared to a case provided on the upper surface of the transmission case and can contribute to miniaturization.

(Problems to be Solved by the Invention) However, each rod is provided with two sets of position detectors such as switches for detecting a neutral position and a predetermined position. ! 61 after 5 steps
In the case of a variable speed, six gears are provided.

The large number of position detectors such as switches increases the probability of failure and impedes the reliability of the operation of the switch 1.

Therefore, it is an object of the present invention to reduce the number of position detectors for detecting the neutral position to improve operational reliability.

(Means for Solving Problems) The gist of the present invention is that a plurality of rods are slidably arranged in a case of a transmission, and the rods are moved to a neutral position by a shift cylinder provided in the case. In a drive control device for a vehicle transmission, the rod is moved to a predetermined position and a shift hawk for moving a sliding gear of a transmission is attached to the rod. , an interlocking mechanism is configured to output a predetermined output and output the opposite at other times,
These surface outputs are detected by a position detector.

(Function) Therefore, when all the rods to which the shift fork is attached are in the neutral position, the information is transmitted to one position detector via the interlocking mechanism, and the number of position detectors can be reduced. This can contribute to operational reliability.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

1 to 3, an upper case 1 constituting the case of an automobile transmission is shown, and three rods 2a, 2b are disposed in the longitudinal direction of the case 1.

2c are slidably arranged in parallel. That is, the rod 2a is a rib 3a formed in the lateral direction of the case 1.

The rod 2b has ribs 3a in the holes 4a and 5a of the rod 2b.

The rod 2C has ribs 3a in the holes 4b and 5b of the rod 3b.

3b are inserted into holes 4c and 5c, respectively.

These rods 2a, 2b, 2c have pistons 7a, 7 of shift cylinders 6a, 6b, 6c at one end (left end) thereof.
b, 7c. In this example, the shift cylinders 6a, 6b, 6c are composed of three-position double-acting hydraulic cylinders, and the cylinder bores 8a, 8b formed in the case 1,
8c, and pistons 7a, 7b, and 7c fitted therein, and hydraulic pressure is appropriately supplied to the respective piston head side chambers 9 and piston rod chambers 10 formed by sandwiching the pistons 7a, 7b, and 7c, The shift cylinder 6a.

6b and 6c are moved to three positions. The oil pressure is supplied to the shift cylinders 6a, 6b, and 6c in the following manner.

The shift hawks 12a, 12b, and 12c are fixed to the rods 2a, 2b, and 2c, respectively, and are engaged with and displaced by a sliding gear of an automobile transmission (not shown).

The shift fork 12a is for 4th and 5th gears, the shift fork 12b is for 1st and reverse, and the shift fork 12c is for 3rd gear.
It controls both speed and second gear.

Position switch 15a, 16, 15b, 15c
is a position detector that detects the positions of the lots 2a, 2b, and 2c. As shown in FIG. 4, for example, the position switch 15a has a ball 30 that abuts a long notch 13a formed in the rod 2a, a spring 31 that presses the ball, and a displacement amount of the ball 30. The transmission rod 32 transmits the information, and the transmission rod 32 turns ON.

It consists of a switch 33 that is turned off.

The position switches 15a and 16 are provided on the rod 2a, the position switch 15b is provided on the rod 2b, and the position switch 15c is provided on the rod 2c.
Long notches 13a, 13b, 13c formed in 2b, 2c
This detects conditions other than neutral.

That is, in this example, when the rods 2a, 2b, 2c change to one side, the ball 30 becomes the long notch 13a.

13b and 13c, the ball 30 is attached to the spring 31
This is transmitted to the switch 33 via the transmission rod 32, and the switch 33 is switched from the ON state to the OFF state. The position switch 15a detects 4th gear or 5th gear, the position switch 15b detects 1st gear or reverse gear, and the position switch 15c detects 3rd gear or 2nd gear.

The position switch 16 is the rod 2a.

Only when both 2b and 2c are in neutral position,
For example, it is turned ON and a neutral position signal is detected. This position switch 16 has the same structure as the city record position switches 15 a, 15 b + 15 c, and consists of a push rod 34 and a switch 35 . The push rod 34 is provided with an interlocking mechanism 37, which will be described below.

The interlocking mechanism 37 includes the hole 5a in the rib 3b.

A sliding hole 40a formed perpendicular to 5b and 5c
, 40b, 40c, holes 38a formed in Orad 2a, 2b
, 38b, a recess 39 formed in the rod 2c, the single motion holes 40a, 40b, 40c, the hole 38a,
The displacement member 41 is slidably inserted into the recess 38b and abuts against the recess 39.

The holes 38a, 38b formed in the rods 2a, 2b are tapered holes at both ends, and the sliding holes 40a are closed when the rods 2a, 2b are in neutral.

40b and 40c, and the recess 39 of the rod 2c is also formed.

It is configured to align with the sliding hole 40c when in neutral.

The displacement member 41 includes a pin 42 having a spring receiver that is inserted into the sliding hole 40a from the sliding hole 40a side and one side of which comes into contact with the push rod 34 of the position switch 16.

A ball 43 that contacts this pin 42 and a spring 44 that presses the pin 42 toward the side opposite to the position switch 16 are arranged. Therefore, the ball 43 is
When the rod 2a is in neutral, the hole 3
8a to create an engaged state.

A pin 45 shorter by β than the length of the chain hole 38a is disposed within the hole 38a, and one of the pins 45 abuts the ball 43 when the rod 2a is in neutral.

A ball 46, a pin 47, and a ball 48 are provided in the sliding hole 40b.
and is longer than the length of this champion by β. Therefore, one of the balls 46 and 48 at both ends is always fitted into the hole 38a or the hole 38b described below.

A pin 49 shorter by β than the length of the chain hole 38b is disposed in the hole 38b, and when the rod 2b is in neutral, one of the pins 49 abuts the ball 48, and the other abuts the ball 5o described below.

A ball 50, a pin 51, and a ball 52 are provided in the sliding hole 40c.
and is longer than the length of these three by β. Therefore, one of the balls 50, 52 at both ends always fits into the hole 38b or the recess 39 having a depth of β.

In the neutral position shown in FIG. 2, the above-mentioned displacement member 41 has the pin 42, the ball 43, the pin 45 . Ball 46, pin 47, ball 48
, pin 49. Ball 50, pin 51. What is ball 52?
-Line in a straight line.

In this state, the ball 43 is fitted into the hole 38a, and the position switch 16 is connected to all the rods 2a, 2b.
, 2c are in the neutral position.

The detent devices 55a, 55b, 55c are provided on the respective rods 2a, 2b, 2c, and have two engaging recesses 56a, 57a formed on the rond side.

5Gb, 57b, 56c, and 57c, and a ball 58 that engages with these (the detent devices 55a and 55b are not shown).

An example of a circuit for moving the shift cylinders 6a, 6b, and 6c described above is shown in FIG. 3, in which two electromagnetic valves (three-bottom, two-position switching valves) are arranged for each shift cylinder. This solenoid valve 61a.

61bt 61cx, shift cylinder 6a.

The piston head side chambers 9 of 6 b and -6 c are connected to the hydraulic power source 6
0 and the tank 63, and the solenoid valve 62
Shift cylinder 6a by a, 62b, 62c.

The piston rod side chambers 10 of 6b and 6c are piped to selectively connect the hydraulic power source 60 and the tank 63. The electromagnetic valves 61 a * 61 b t 61 c and 62 a , 62 b , and 62 c are provided integrally with the case 1 .

In the above configuration, an example of the operation of the shift cylinder will be described. In FIGS. 2 and 3, the shift cylinder is in the N (neutral) position. In this N position.

All rods 2a, 2b, 2c are movable. For example, when switching to 1st speed, the solenoid valve 62
energize b and switch to the offset position. As a result, the valve 62b connects the hydraulic pressure [60] and the piston rod side chamber 10, so that the pressure oil flows into the piston rod side chamber 10 of the shift cylinder 6b, presses the piston 7b, and displaces the rod 2b to the left. At this time, the pressure oil in the piston head side chamber 10 is discharged to the tongue 63 because the solenoid valve 61b is connected to the tank 63 side. Then, as shown in FIG. 5, the rod 2b is displaced, and the position switch 15
When it is detected that the predetermined position has been reached from a, 16, it is fed back to a control circuit (not shown), the energization to the solenoid valve 62b is stopped, and the solenoid valve 62b is returned to the normal position. As a result, the supply of pressure oil to the chamber 10 is stopped, and the drive of the shift cylinder 6b is stopped. Then, the position of the shift cylinder 6b is determined by the detent device 5.
It is fixed at 5b.

In this way, when the rod 2b is displaced and switched to first speed,
The ball 5o of the displacement member 41 comes into contact with the side surface of the rod 2b, and the ball 52 cannot disengage from the recess 39. Therefore, even if an external force is applied, the rod 2C is fixed in its neutral position. At the same time, the ball 48 also hits the side surface of the rod 2b, so that the ball 46 fits into the hole 38a and cannot be released from the fit. Therefore, even if an external force is applied, the rod 2a is fixed in its neutral position. In addition, in this first speed, the ball 43 is moved by the displacement β of the ball 48 through the pin 47, the ball 46, and the pin 45, and the ball 43 is displaced upward against the spring 44. There is. As a result, the position switch 16 outputs the opposite output. Such a situation is shown in FIG.

Also, when switching from the current 1st speed to 2nd speed.

First, the solenoid valve 61b is energized and switched to the offset position. As a result, pressure oil flows from the hydraulic pressure source 60 into the piston head side chamber 9, presses the piston 7b, and displaces the rod 2b to the right. Then, the pressure oil in the piston rod side chamber 10 at that time is discharged to the tank 63. When the rod 2b is returned to the neutral position, the displacement member 41 becomes continuous, and since the ball 48 is fitted into the hole 38b, the displacement β is transmitted to the ball 43.
The ball 43 is displaced downward. As a result, it is determined that the output of the position switch 16 has been reversed and the position switch 16 has reached the neutral position. Once this neutral position is confirmed, the solenoid valve 61c is energized to switch to the offset position in order to switch to second speed. As a result, pressure oil flows from the hydraulic source 60 into the piston head side chamber 9, and the rod 2c
Displace to the right. Then, the pressure oil in the piston rod side chamber 10 at that time is discharged to the tank 63, and when it is confirmed by the position switch 15b that it has reached a predetermined position, it is fed back to the control circuit (not shown), and the solenoid valve 61c is fed back to the control circuit (not shown). is returned to its normal position. As a result, the supply of pressure oil to the chamber 9 is stopped, and the driving of the shift cylinder 6C is stopped. Then, at the detent device 55c,
Its position is fixed.

In addition, in the case of 1st speed, for example, 4th speed, as shown in FIG. 6, the rod 2a moves to the left and the ball 43 comes out of the hole 38a and comes into contact with the side of the rod 2a. The switch 16 outputs the opposite output.

When the output of the position switch 15a is reversed, the rod 2a is stopped.

In this way, the shift cylinder 6C is controlled.

Control of the shift cylinders 6a, 6b, 6c of this device is as follows:
This is performed by control signals from a microcomputer (not shown). In other words, the position of the car's accelerator pedal,
A microcomputer calculates the optimal shift position using the engine speed, etc. as an input source, and the solenoid valve 6
This is done by exciting 1a to 61c and 62a to 62c.

For example, when starting a car, the solenoid valve 62b is energized and switched to the offset position, and the shift fork 12b is switched to the offset position.
is displaced and switched to first speed, and the solenoid valve 62b is deenergized.

Then, the car starts moving and speeds up to several kII/h.

The solenoid valve 61b is energized and switched to the offset position,
The shift fork 1.2b is returned to the N position, and the solenoid valve 61c is switched to the offset position, and the shift fork 1.2b is returned to the N position.
2c is displaced and switched to 2nd speed.

Therefore, the solenoid valve 61c is deenergized.

When the speed of the car further increases, the solenoid valve 62c is energized and switched to the offset position, and the shifter cross 2c returns to the N position, and is then displaced from the N position to the 3rd gear side.
The solenoid valve 62c is then deenergized.

In this way, the operation is performed sequentially from the first gear to the second gear and then to the third gear. These instructions are used by a microcomputer to perform optimal shifts from 1st gear to 5th gear.

Note that the displacement member 41 of this embodiment is not limited to this example, and may include a pin 40a and a ball 43, a pin 47 and a ball 4, etc.
Rod 2a with 6.48 and three pins integrating pin 51 and ball 50°52.

It may also be combined with pins 45 and 49 in 2b.

(Effects of the Invention) As described above, according to the present invention, since the position switch for detecting the neutral position can be integrated into one, the number of switches can be reduced and the operation can be stabilized. It is something.

Also, because it has an interlocking mechanism, when a given rod is in a position other than neutral, the other rods are locked.
This ensures stability in mechanical operation.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a hydraulic circuit diagram of the present invention.
FIG. 4 is a sectional view of the vicinity of the position switch, and FIGS. 5 and 6 are sectional views illustrating an example of operation. 1... Case, 2a, 2b, 2c... Rod, 6a
, 6b, 6c...shift cylinder, 12a. 12b, 12c...Shift fork, 16...Position switch, 37...Interlocking mechanism. Figure 3 1, G3 @5 Figure #f 6 Figure '55c

Claims (3)

[Claims] 1. A plurality of rods are slidably arranged in the case of the transmission, and the rods are moved between the neutral position and a predetermined position by a shift cylinder provided in the case. In a drive control device for a vehicle transmission equipped with a shift fork that moves a sliding gear, when all of the plurality of rods are in the neutral position, a predetermined output is produced, and at other times, the opposite output is produced. 1. A drive control device for a vehicle transmission, characterized in that an interlocking mechanism is configured as shown in FIG. 2. The interlocking mechanism includes forming holes diametrically in the rods except for the rod furthest from the position detector, and a recess in the rod furthest from the position detector, and inserting a displacement member slidably into the hole, and adjusting the displacement of the rod. 2. The drive control device for a vehicle transmission according to claim 1, wherein the member can be fitted into the furthest recess. 3. 2. The drive control device for a vehicle transmission according to claim 1, wherein the position detector is a switch that is turned on and off in accordance with a change in position.