JPS6136507A - Output generator - Google Patents

Abstract

PURPOSE:To reduce the dimension of the captioned apparatus by fitting the top edge parts of a pair of free pistons in slidable ways each other. CONSTITUTION:As for a pair of free pistons 13 and 14, the top edges 13a and 14a opposed each other are fitted in slidable ways, and a piston rod 12 is inserted into the free pistons 13 and 14. The free pistons 13 and 14 are constituted of annular basic edge parts 13b and 14b onto which a piston ring 15 is fitted and the cylindrical top edge parts 13a and 14a, and the top edge part 13a of the free piston 13 is installed onto the outer peripheral side of the basic edge part 13b, and a press-feeding piece 13c engaged with a fixed piston 17 is installed onto the inner peripheral surface. The top edge part 14a of the free piston 14 is installed onto the inner peripheral side of the basic edge part 14b. Since, with such constitution, the dimension in the axial direction can be reduced, the dimension of the output apparatus can be reduced furthermore.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to an output generating device. More specifically, it is a fluid pressure cylinder type output generating device comprising a cylinder, a piston and a piston rod, the piston having three
It relates to something that can be made to take a position.

Mainly in large vehicles, for example, the driver operates a change lever located at the front of the vehicle to operate a transmission operating device located at the rear of the vehicle, and this operating device remotely controls the transmission located at the rear of the vehicle. A transmission system is used.

The above-mentioned transmission operating device is normally attached to the upper part of the transmission, and the shift ta operating lever in the operating device is projected downward from the opening of the transmission into the transmission, and the FXFM operating lever is moved to enter the transmission. Perform gear switching operations.

For example, when the transmission is a 5-speed transmission, the above operation lever is
As shown in Fig. 3, a total of 99 positions can be taken, including R, 1st to 5th speeds, and neutral N1 to Ni, that is, 3 positions can be taken by moving in the shift direction (direction of arrow A), and the shift It is constructed so that it can move in the direction of shift perpendicular to direction A (direction of arrow B) and assume three positions.

Therefore, the above-mentioned transmission V & operating device uses a shift direction output generating device and a select direction output generating device that can each move in a linear direction to take three positions, and these are arranged at right angles to move the transmission operating lever to the first position. It is moved as shown in Figure 3.

b. Prior art FIG. 4 shows the output destination and raw equipment in the conventional shift direction;
This device consists of a cylinder 1, a piston rod 2 inserted into the cylinder 1, an inner fixed piston 3 provided on the rod 2, and a structure that can be slid left and right between the piston 3 and the cylinder 1. The cylinder 1 has two outer free pistons 4, 5 arranged therein, and a stopper 6, which the front end surfaces of the left and right outer free pistons 4.5 come into contact with, is provided at approximately the center of the inner surface of the cylinder 1, and the left and right outer free pistons 4.5 When the free piston moves forward (in the direction of arrow F) and comes into contact with the stopper 6, it engages with the inner fixed piston 3 and pushes the piston 3 in the same direction (in the forward direction shown by arrow F). It is provided with pushing pieces 4a and 5a which are used for pushing.

In addition, pressure chambers g and h are provided on the left and right sides of the piston assembly consisting of the pistons 3.4.5, and the pressure chambers g and h
Solenoid valves G and H are connected to each.

゛ Note that the piston rod 2 of the shift direction output generating device is equipped with a shift i operating lever 7 rotatable and a rod 2.
A yoke 8 is engaged with the operating lever 7, and the yoke 8 is connected to a select direction output generator disposed perpendicularly to the shift direction output generator as shown in FIG. It is fixed to the piston rod 9 of. Therefore, the operating lever 7 is moved by the piston rod 2 in the shift direction to, for example, 2nd, N, and 3rd gear positions, and the piston rod 9 is moved in the select direction to, for example, N1°N,
and move to the N8 position to change gears in the transmission IO.

The operation of this power generating device will be described with reference to FIG. 4. This device can assume three positions, for example 2nd gear, N, and 3rd gear. First, in the case of the second speed position, pressure fluid is supplied from the solenoid valve H to the pressure chamber. Then, the right outer free piston 5 is positioned with its front end surface contacting the stopper 6 as shown in the figure, and the inner fixed piston 3 moves to the left while pushing the piston 4 via the pushing piece 4a of the left outer free piston. Then, the rear end surface of the piston 4 comes into contact with the left side wall of the cylinder 1, and the piston rod 2 (
The operating lever 7) is in the second gear position. In the case of 3rd gear position,
Pressure fluid is supplied from the solenoid valve G to the pressure chamber g. Then, the left outer free piston 4 is positioned with its front end surface in contact with the stopper 6, and the inner fixed piston 3 moves to the right side while pushing the piston 5 through the pushing piece 5a of the right outer free piston. The rear end surface of the piston 5 comes into contact with the right side wall of the cylinder 1, and the piston rod 2 is in the third speed position. In the case of the N1 position, pressure fluid is supplied from the solenoid valves G and H to the front pressure chambers g and h. Then, for example, when only the inner fixed piston 3 is used, the piston 3 is not necessarily positioned at the center, but in the case of this device, fluid pressure acts on the rear end surfaces of the left and right outer free pistons 4.5Φ,
Since no fluid pressure acts on the front end surface of the piston 4.5, the outer free pistons 4, 5 are pushed forward (in the direction of arrow F), thereby moving the inner fixed piston 3 to the <N position as shown in the figure. For example, when the inner fixed piston 3 stops at a position shifted to the right from the center, the left outer free piston 4 stops with its front end surface contacting the stopper 6 as shown in the figure, and the right outer free piston 4 stops. 5 pushes the inner fixed piston 3 to the left via the pushing piece 5a, and the leftward pressing force acting on the inner fixed piston 3 becomes larger than the rightward pressing force. Therefore, the inner fixed piston 3 moves to the left, and the right outer free piston 5
When the front end surface of the front end contacts the stopper 6, the state shown in the figure is reached, and the N2 position is reached.

C1 Problems to be Solved by the Invention However, according to the conventional output generator, the pressure chamber H
, h as the axial length excluding outer free piston 4.
5 and the width of the stopper 6 are required.

In order to solve the above-mentioned problems, the present invention shortens the axial dimension by arranging a pair of free pistons so that they face each other and their tips are slidably fitted, resulting in a more compact design. The purpose of the present invention is to provide an output derivation device that can achieve the following.

Means for solving the d1 problem The present invention will be described in detail below with reference to the illustrated embodiments.

FIG. 1 is a conceptual cross-sectional view showing an output generation device according to the present invention applied to a shift direction output generation device in a shift i operating device.

In the same figure, 11 is a cylinder, 12 is the cylinder ll
This is the piston rod inserted inside. 13 and 14 are distal end portions 13a facing each other within the cylinder.

A pair of free pistons 14a are arranged to be slidably fitted together, and the piston rod 12 is inserted through these free pistons 13 and 14 on their axes. These free pistons 13, 14 are composed of annular proximal ends 13b, 14b on which piston rings 15 are attached, and cylindrical distal ends 13a, 14a. A pushing piece 13 is provided on the outer circumferential side of the portion 13b and engages with a fixed piston, which will be described later, on the inner circumferential surface.
c, and the free piston 14 has a distal end 14a disposed on the inner peripheral side of a proximal end 14b, and a distal end 13a, respectively.

14a are slidably fitted into each other. 16 is a piston ring provided on the outer periphery of the tip 14a of the inner free piston 14.

Reference numeral 17 denotes a fixed piston provided on the piston rod 12, which is disposed facing each other between the tip end face of the inner free piston 14 and the base end face of the outer free piston 13, and has an outer circumferential surface. The tip 13a of the free piston 13 via the attached piston ring 18
It is in sliding contact with the inner peripheral surface. 19 is a snap ring for fixing the fixed piston 17 to the piston rod 12.

Reference numeral 20 denotes a stopper provided at a predetermined position on the inner surface of the cylinder 11, facing the end face of the distal end of the outer free piston 13 and the end face of the proximal end of the inner free piston 14. The position of this stopper 20 is
The fixed piston 17 is set to be in the neutral position when the distal end surface of the inner free piston 14 and the proximal end surface of the inner free piston 14 are in contact with the stopper 20.

g and h are each piston 13゜14 in the cylinder 11
, IT are pressure chambers formed on the left and right sides of the piston assembly, and the pressure chambers g and h are equipped with solenoid valves G, G and H, respectively.
H is connected, and pressure fluid is supplied to the pressure chambers g and h by actuation of the solenoid valves G and H. 21 is a transmission operating lever provided on the piston rod 12.

60 Operation Next, the operation of the output generating device having the above configuration will be explained.

The device can assume three positions, for example 2nd, N, and 3rd. First, in the case of the second speed position, pressure fluid is supplied from the solenoid valve H to the pressure chamber. Then, as shown in FIG. 2+a+, the inner free piston 14 moves to the left while pushing the defining piston 17 via the end surface of the tip portion 14a. Then, the end surface of the base end portion 14b comes into contact with the stopper 20,
The inner free piston 14 is positioned. Subsequently, the fixed piston 17 is further moved by the fluid pressure acting through the gap between the free pistons 14 and stops at a position where the base end 13b of the free piston 13 comes into contact with the inner wall surface of the cylinder 11. In this way, the fixed piston 17 converts the piston rod 12 (operating lever 21) to the second speed position.

Next, in the case of the third speed position, pressure fluid is supplied from the solenoid valve G to the pressure chamber g. Then, as shown in FIG.
move to the right while pushing the fixed piston 17 via c. Then, the end surface of the tip portion 13a comes into contact with the stopper 20, and the outer piston becomes free! 3 is positioned. M
The fixed piston 17 is connected to the base end 1 of the free piston 13.
The free piston 14 is moved further while being pushed by the fluid pressure acting through the gap 3b, and the free piston 1
4 stops at the position where it comes into contact with the inner wall surface of the cylinder 11. As a result, the fixed piston 17 converts the piston rod (operating lever 21) to the third speed position.

In the case of N2 position, both pressure chambers g,
Supply pressure fluid to h.

As a result, as shown in FIG. 1, the free piston 13.
14 are each pushed forward, and the end face of the tip part 13a of the free piston 13 and the base end part 14b of the free piston 14
The end face is locked and positioned by the stopper 20. At this time, the fixed piston 17 is positioned by the pushing piece 13c of the free piston 13 and the end surface of the tip 14a of the free piston 14, and becomes the N1 position.

f1 Effects of the Invention As described above, according to the output generating device of the present invention, since a pair of free pistons are used with their tips slidably fitted together, it is further miniaturized compared to conventional devices. can be achieved.

It goes without saying that the present invention can also be used for purposes other than the gear shift taI11 control device for automobiles.

4. Fl! WI small explanation of J side Fig. 1 is a cross-sectional conceptual diagram of a transmission operating device equipped with an output generating device according to the present invention, and Fig. 2 (a value) is a conceptual diagram showing the operation of the output generating device of Fig. 1. Cross-sectional view, Figure 3 shows the movement of the transmission control lever! FIG. 4 is a cross-sectional conceptual diagram of a conventional output generating device, and FIG. 5 is a cross-sectional conceptual diagram taken along the line ■--■ in FIG. 4.

ll...Cylinder, 12...Piston Rondo 13.14...Free piston, 17...Fixed piston, 20...S) 7 par, 13a,
14a... Tip part! 3b, 14b... base end portion, 13c... pushing piece.

Figure 1 Figure 3 Figure 4 -N2- 1V,j Figure 5 Procedural amendment (self-restraint) November 9, 1982 Mr. Manabu Shiga, Commissioner of the Patent Office 1.Display of the incident 1981 Patent Application No. 156771 2. Name of the invention output generator 3. Person who makes corrections Relationship to the case Patent applicant Name Jidosha Fat Equipment Co., Ltd. 4. Agent〒107 (2 others)

Claims (1)

[Claims] a cylinder, a piston rod inserted into the cylinder, and a pair of free piston rods disposed in the cylinder with mutually opposing ends slidably fitted, and loosely inserted into the piston rod on the axis. a fixed piston, which is provided on the piston rod, faces the end face of the distal end of the free piston fitted inside, and slides on the inner circumferential surface of the free piston fitted on the outside;
A stopper is provided at a predetermined position on the inner surface of the cylinder and faces the end surface of the distal end of the outer free piston and the end surface of the proximal end of the inner free piston, and the stopper is provided on the inner circumferential surface of the proximal end of the outer free piston. engage and
An output generating device characterized in that a pushing piece for pushing the fixed piston is provided, and a position where the tip of the outer free piston and the base end of the inner free piston abut against a stopper is set at a neutral position of the fixed piston. .