JPS62251240A - Driving control device for vehicle transmission - Google Patents

Abstract

PURPOSE:To eliminate the necessity for a neutral position detector and to enhance the safety of operation, by receiving light from a light emitting device by a light receiving device and detecting the neutral position when the all rods, supporting shift forks, are placed in the neutral position. CONSTITUTION:Three rods 2a-2c are provided in a case 1, and the rods, which are connected with pistons 7a-7c in shift cylinders 6a-6c arranged in one end side of the rod, are moved in the axial direction by controlling the supply of oil pressure to each cylinder 6a-6c. Shift forks 12a-12c, which are secured to each rod 2a-2c, are displaced engaging with a sliding gear of a transmission. In the above device, each rod 2a-2c forms holes 22a-22c which are lined on a straight line when these rods are placed in the neutral position. And these holes 22a-22c, when they are lined on the straight line, are detected by receiving light from a light emitting device 16 by a light receiving device 17.

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.

(Conventional technology) As an automatic operating device for this type of automobile transmission.

It has two hydraulic cylinders that move the internal lever in two directions at right angles to the shift direction and the select direction, and an electromagnetically operated directional control valve that switches the direction of the hydraulic pressure of the hydraulic cylinders, and the directional control valve is controlled by a control circuit. It is already known that automatic control is performed via the .

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 moved, but the internal lever is rotated with the rod of the shift actuator at the upper end of the internal lever as a fulcrum in the shift 1 direction. A method of doing so has been 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 is.

A plurality of differential shift cylinders are arranged in parallel, and each output lot of each of the shift cylinders is provided with an engagement lever,
Each of these engagement levers was inserted through a hole in a case of an automobile transmission and engaged with a shift fork, and these operating devices were installed on the top surface 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 a shift cylinder provided in the case, and the sliding gears of the transmission are connected to the rods. It has a structure with a moving shift hawk attached. In other words, a rod slidably installed in the transmission case is moved by a shift cylinder installed at the end of the rod, and a shift fork is moved accordingly to change the speed.The shift cylinder is moved inside the case. Since it is provided on the upper surface of the transmission case, it does not protrude compared to the case provided on the upper surface of the transmission case and can contribute to miniaturization.

(Problem 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. In the case of , six are provided.

The large number of position detectors such as switches increases the probability of failure and impedes operational safety.

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

(Means for solving problems) The first aspect of this invention is the transmission case.

A plurality of rods are arranged in a slidable manner, and these rods are moved between a neutral position and a predetermined position by a shift cylinder provided in the case, and the rods are provided with a shift cylinder that operates a sliding gear of a transmission. In a drive control device for a vehicle transmission equipped with a hawk, holes are formed in each of the rods so as to communicate when all of the rods are in the neutral position, and holes are formed in the ribs in a direction perpendicular to the holes in which the rods slide. A hole is formed in the transmission case, and a light emitting device and a light receiving device are provided at both ends of the hole.The second method is to arrange a plurality of rods in a slidable manner in the case of the transmission, and the rods are attached to the case. In a drive control device for a vehicle transmission, the rod is moved between a neutral position and a predetermined position by a shift cylinder provided therein, and a shift fork for moving a sliding gear of the transmission is attached to the rod. forming holes in the ribs in a direction perpendicular to the hole through which the rod slides,
A light-emitting device and a light-receiving device are provided at both ends of this hole, and an engagement mechanism is arranged in the hole in the rib between the rods at both ends and the hole formed in the rod except for the rods at both ends. This is due to the formation of holes.

(Function) Therefore, when the shift fork is installed and all four rods are in the neutral position, the light emitted by the light emitting device is received by the light receiving device, and the neutral position can be detected. This eliminates the need for a position detector to detect the position of the engine, which reduces the number of parts and contributes to operational safety.

(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.

They are inserted into holes 4Q and 5c of 3b, 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 switches 15a, 15b, 15c are position detectors that detect the positions of the rods 2a, 2b, 2c. For example, as shown in FIG. 4, in the case of the position switch 15a, a ball 30 that abuts a long notch 13a formed in the rod 2a
, a spring 31 that presses this, a transmission rod 32 that transmits the amount of displacement of the ball 30, and a transmission rod 32 that turns ON and OFF.
It consists of a switch 33 that is turned OFF.

The position switch 15a is connected to the rod 2a, the position switch 15b is connected to the rod 2b, and the position switch 1
5c is provided on the rod 2C, and the position switch 1
5a, 15b, 15c are rods 2a, 2b, 2
A long notch 13a formed at c.

13b and 13c are used to detect states 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 whether the vehicle is in 4th or 5th gear, the position switch 15b detects whether the vehicle is in 1st or reverse gear, and the position switch 15c detects whether the vehicle is in 3rd or 2nd gear.

The light emitting device 16 and the light receiving device 17 are connected to the rods 2a and 2.
Only when all of b and 2c are in the neutral position, for example, they are turned ON or OFF and a neutral position signal is output.

The light emitting device 16 and the light receiving device 17 are provided in holes 5a in the rib 36, into which the rods 2a, 2b, and 2c slide.
, 5b, and a hole 20a formed in a direction perpendicular to 5c.
Holes 20a at both ends of 20b, 20c, and 20d
, 20d.

As the light emitting device 16, a light emitting diode or the like is used, and as the light receiving device 17, a phototransistor is used. The light emitting device 16 and the light receiving device 17 are formed by holes 22a, 22b, 22 formed in rods 2a, 2b, 2c as described below.
When the holes 20b, 20c, and 20d are arranged in a straight line in neutral, the light emitted by the light emitting device 16 reaches the receiving device 17. In this embodiment, the holes 20b, 20c, and 20d
Since the following engaging mechanism 24 is provided, the pins 25, 26, and 27 constituting this engaging mechanism 24 pass through vertical holes 25a, 26a, and 27a formed at the center.

The engagement mechanism 24 includes holes 20a, 20c, a hole 22b, and a pin 25. which is slidably disposed within the holes 20b, 20c.
27, a pin 26 slidably disposed in a hole 22b formed in the rod 2a, a recess 28 formed in the rod 2a, and four parts 29 formed in the rod 2c. This engagement mechanism 24 is.

In the neutral position, as shown in FIG. 2, the rods are continuous, and if one of the rods 2a, 2b, and 2c is displaced to a position other than the neutral position, the other two rods are fixed.

Note that the pin 25°26.2 constituting this engagement mechanism 24
7 has a vertical hole 25a formed in the vertical direction thereof.

26a and 27a are perforated.

A detent device 40a, 40b, 40c is provided on each rod 2a, 2b, 2c and maintains three positions.

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 51a.

51b and 51c, the shift cylinder 6a.

The piston head side chambers 9 of 6b and 6c are selectively connected to a hydraulic power source 60 and a tank 63, and are also connected to electromagnetic valves 52a and 5.
Shift cylinder 6a by 2b and 52c.

The piston rod side chambers 10 of 6b and 6c are piped to selectively connect the hydraulic power source 60 and the tank 63. These solenoid valves 51a, 51b, 51c and 52a, 52
b and 52c are provided integrally with the case 1.

In the above configuration, an example of the operation of shift 1 to cylinders is as shown in Figures 2 and 3 (neutral to N).
in position. In this state, light is transmitted from the light emitting device 16 to the light receiving device 17, and it is output that the light receiving device 17 is currently in the neutral position. .

In this N position, all rods 2a, 2b.

2c is designed to be able to be displaced. For example, when switching to 1st speed, the solenoid valve 51b is energized and the offset gear 1-
Switch to position. As a result, the valve 52b connects the hydraulic power source 60 and the piston head side chamber 9, 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 that time, the pressure oil in the piston head side chamber 10 is removed by the solenoid valve 5.
1b is connected to the tank 63 side, so the tank 63
is discharged to. Then, as shown in FIG. 5, the rod 2b is displaced, and the position switch 15a and the light receiving device 17 (light is guided to the light receiving device 17, and a signal opposite to that in the above-mentioned new direction is outputted). When it is detected that the position has been reached, 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 1o is stopped, and the driving of the shifter 1 to the cylinder 6b is stopped. Then, the position of the shift cylinder 6b is fixed to the butene 1 by the device 4-Ob.

In this way, when the rod 2b is displaced and switched to first speed,
The pins 25 and 27 of the displacement member 24 come into contact with the side surfaces of the rod 2b, and the two pins 25 and 27 move into the recesses 28 and 29.
It becomes impossible to disengage from the engagement. therefore,
Even if an external force is applied, the rods 2a and 2c are fixed in their neutral positions.

Further, when switching from the current first speed to the second speed, the solenoid valve 51b is first excited and switched to the offset position. As a result, pressure oil flows into the piston head side chamber 9 from the hydraulic pressure source 6o, presses the piston 7b, and displaces the rod 2b to the right. Then, the pressure oil in the piston rod side chamber lo at that time is discharged to the tank 63. Then, when the rod 2b is returned to the neutral position, the holes 22a, 22b
, 22c become a series, and the light from the light emitting device 16 reaches the light receiving device 17, and as a result, it is determined that the light receiving device 17 has reversed its output and reached the neutral position. Once this neutral position is confirmed, the tii magnetic valve 51c is energized to switch to the offset position in order to switch to second speed. As a result, pressure oil flows from the hydraulic power source 60 into the piston head side chamber 9, displacing the rod 2c to the right. Then, the pressure oil in the screw 1-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 the predetermined position, it is fed back to the control circuit (not shown), and the electromagnetic oil is fed back to the control circuit (not shown). Valve 51c is returned to the normal position. As a result, the supply of pressure oil to the chamber 9 is stopped, and the driving of the shift cylinder 6b is stopped. Then, at the detent device 40c.

Its position is fixed.

In this way, shifts are performed sequentially from 1st speed to 2nd speed and then to 3rd speed, and the appropriate shift is made.

The shift cylinders 6a, 6b, 6c of this device are controlled by 1
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 5
This is done by exciting 1a to 51c and 52a to 52c.

In addition, in this example, rods 2 a, 2 b, 2 c
In contrast, since the engagement mechanism 24 is provided, the hole 20b.

A pin 25, 27 is provided in 2Oc and a pin 26 is provided in the hole 22b, but if the engagement mechanism 24 is not provided, those pins 25, 26, 27 will be in a removed state. .

(Effects of the Invention) As described above, according to the present invention, a set of light emitting device and light receiving device can be used for detecting the neutral position (neutral position), thereby reducing the number of position switches for position detection. This ensures safety in 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 FIG. 5 is a sectional view illustrating an example of operation. 1... Case, 2a, 2b, 2c... Rod, 5a
, 5b, 5e...hole, 6a, 6b, 6c...shift cylinder, 12a, 12b, 12c...shift hawk, 16...light emitting device, 17...light receiving device. 20a, 20b, 20c, 20d"...hole, 22a. 22b, 22c...hole, 24...engaging mechanism. Fig. 3 15a Fig. 5

Claims (1)

[Claims] 1. A plurality of rods are slidably disposed in a case of a transmission, and the rods are moved between a neutral position and a predetermined position by a shift cylinder provided in the case. , in a drive control device for a vehicle transmission in which a shift fork for moving a sliding gear of a transmission is attached to the rod, holes are respectively formed in the rods so as to communicate with each other when all of the rods are in the neutral position; 1. A drive control device for a vehicle transmission, characterized in that a hole is formed in the rib in a direction perpendicular to the sliding hole, and a light emitting device and a light receiving device are provided at both ends of the hole, respectively. 2. A plurality of rods are slidably arranged in the case of the transmission, and the rods are moved between a neutral position and a predetermined position by a shift cylinder provided in the case, and the rods are connected to the transmission. In a drive control device for a vehicle transmission equipped with a shift fork that moves a sliding gear, holes are formed in each of the rods so as to communicate with each other when all of the rods are in a neutral position, and the rods slide into the holes, A hole is formed in the rib in a perpendicular direction, and a light emitting device and a light receiving device are provided at both ends of the hole, respectively.
Drive of a vehicle transmission characterized in that an engagement mechanism is disposed in a hole in a rib between rods at both ends and a hole formed in the rod except for the rods at both ends, and a vertical hole is formed in the engagement mechanism. Control device.