JPH0446A - Transmission and set speed variable device - Google Patents

Abstract

PURPOSE:To accelerate and decelerate quickly with the air by supplying and exhausting the air of air cylinders of an input side and an output side mutually with an outside command so as to accelerate up to a cylinder end in the high speed side and so as to decelerate up to a slide end of an input side movable conical plate in the low speed side. CONSTITUTION:At the time of acceleration, a solenoid valve 12 of an input side air cylinder 6 is opened to feed the air till the set speed, and a solenoid valve 26 of the other output side air cylinder 24 is closed to open an air chamber, and a piston 7 of the input side air cylinder 6 is moved until the piston 7 abuts on a cylinder end, and a movable conical plate 1 is moved to a fixed conical plate 2 side to get the set speed. At this stage, a movable conical plate 17 of the output side is separated from a fixed conical plate 18 by the tension force of a speed changing belt 28, resisting a spring 22 with a predetermined pressure for transmitting the rotation, to change the speed instantly. Next, at the time of instant deceleration to the lowest speed, the solenoid valve 26 is opened and the solenoid valve 24 is closed, and the output side movable conical plate 17 is pushed to the fixed side conical plate 18 forcedly by the work of the output side piston 23 and the spring 22.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is capable of automatically and instantaneously increasing or decreasing the manually or automatically set rotation speed and the minimum rotation speed of the transmission in accordance with an external command in a belt type transmission. The present invention relates to a transmission whose set rotation speed can be varied and a set rotation speed variable device.

[Conventional technology]

Conventional automatic control of belt-type continuously variable transmissions was performed using a pilot motor or hydraulic pressure. Some are movable.

[Problem to be solved by the invention]

Conventional systems that automatically control transmissions using hydraulics make instantaneous gear changes difficult because it takes time to supply and drain oil, and unnecessary lateral pressure is applied to the transmission belt due to front pressure during gear changes, so a belt with strong lateral pressure rigidity is required. Belts with high lateral pressure rigidity increase costs, produce high levels of noise and vibration, and cannot be used in industrial machinery, machine tools, etc. that require rapid acceleration/deceleration on a regular basis.

Conventionally, when automatically controlling a transmission using air, it is difficult to set and control the rotation speed, and if the rotation speed is used continuously at a constant speed, air leakage occurs, and the constant position is maintained using an air cylinder. Therefore, it was considered impossible to rapidly increase or decrease speed using air.

Furthermore, if the output movable conical plate is simply pressed by a spring as in the conventional belt-type continuously variable transmission, the pressing force is weak, so deceleration time is long, and the speed cannot be changed instantly.

Furthermore, when controlling the rotation speed using a comparator circuit or the like, if a control device is installed that automatically increases the rotation speed to the set rotation speed, the speed change time is short, so it takes time to settle down to the set rotation speed, and chattering occurs. There were many problems such as the setting rotation speed could not be determined due to the occurrence of this problem.

[Means to solve the problem]

In order to achieve the above object, the transmission according to the present invention is capable of shifting the input side of a belt-type transmission.■ It is possible to move across the entire speed change range by supplying and discharging air between the movable conical plate of the pulley and the speed change operation device by opening and closing a solenoid valve, etc. An air cylinder equipped with an air cylinder with a piston inserted therein, and capable of turning on and off the pressing force on the fixed conical plate by supplying and discharging air by opening and closing a solenoid valve to the bearing of the movable conical plate of the output side variable speed V-pulley. The air cylinders on the input and output sides are alternately supplied and discharged according to an external command, so that the high speed side accelerates to the cylinder end, and the low speed side decelerates to the sliding end of the movable conical plate. This relates to a technical means that makes it possible to increase and decelerate the speed.

Further, the set rotation speed variable device of the transmission is a technical means that allows adjustment of the axial movement position of an air cylinder connected to a movable conical plate by a speed change operation device, thereby making it possible to set the set rotation speed. It is.

[For production]

According to the transmission of the present invention, when speeding up to a set rotation speed, air is sent by opening the solenoid valve of the input side air cylinder, and air is sent into the air chamber by closing the solenoid valve of the other output side air cylinder. ! ! 1. a, the piston of the input side air cylinder is moved toward the fixed conical plate until it hits the cylinder end, and the movable conical plate is moved toward the fixed conical plate to reach the set rotation speed. At this time, the movable conical plate on the output side opposes the upward movement of the fixed conical plate on the output side due to the tension of the speed change belt. At this time, the air chamber of the output side air cylinder is open and there is no resistance to the movement of the output side movable conical plate. Also, a spring with a predetermined pressure that can transmit rotation is used on the output side movable conical plate, but since the pressing force is considerably weaker than that of the input air cylinder, the speed can be changed instantaneously.

Next, when instantaneously decelerating to the lowest speed, open the solenoid valve of the output side air cylinder to feed air into the output side air cylinder, and by the action of the output side piston and spring, the output side movable conical plate is moved to the fixed side conical plate. Press emphatically. At this time, the solenoid/valve of the input end air cylinder is closed to open the air chamber, and the input side movable conical plate is separated from the fixed conical plate by the tension of the speed change belt and opens to the low speed side stopper of the movable Fll root plate, and the rotation speed is the lowest speed.

In addition, by adjusting the position of the air cylinder in the axial direction using the speed change operation device and varying the minimum speed of the transmission and the set rotation speed, the speed can be instantly increased to the set rotation speed when increasing speed, and when decelerating. You can slow down to the lowest speed.

〔Example〕

Examples will be described with reference to the drawings.

In Figures 1 to 4, Vl is the input side V pulley, 2
is a fixed conical plate on the input side, and is formed integrally with the rotating shaft 3 fixed to the shaft of the drive motor. Reference numeral 1 denotes an input movable conical plate facing the fixed conical plate 1, which is fitted onto the rotating shaft 3 so as to be able to freely slide in the axial direction. Reference numeral 4 designates a low-speed stopper provided at the sliding end of the rotary shaft 3 so that the boss portion of the movable conical plate 1 slides and is received at the lowest speed position.

Reference numeral 6 denotes an input side air cylinder in which a piston 7 is inserted through a seal so as to form an input air chamber 8, and a protruding shaft 7a of the piston is slidably inserted. The movable conical plate 2 is fitted between the side movable conical plate 2 and the disguise operation device A so as to be movable, the piston 7 is connected to the movable conical plate 1 via the bearing 5, and the piston 7 and the movable conical plate 1 are moved in the axial direction. It is fixed and interlocks with a free relationship in the direction of rotation. Reference numeral 9 denotes a speed-increasing stopper provided at the end of the protruding shaft 7a of the piston 7 so that the piston 7 is pressed by air and stops when it hits the cylinder end at a set rotational speed.

Reference numeral 12 designates an input-side solenoid valve, which is provided in connection with an air road leading to the air chamber 8 of the input-side air cylinder 6;
2 is turned ON, air is sent into the air chamber 8 of the air cylinder 6, and the input side piston 7 is moved through the bearing 5 to move the input end movable conical plate 1 toward the input side fixed conical plate 2, and By turning off the solenoid valve 12, the air chamber 8 is opened and the air is released to the outside, so that no air remains in the air chamber 8. 13 is a flow rate adjustment spindle facing the air passage.

Reference numeral A denotes a speed change operation device, in which a speed change operation rod 15 is screwed into a body 14 provided in an opening 11a bored in the upper surface of the rear part of the cylinder body 11 so as to be able to be raised and lowered manually or automatically. The triangular shape If! has an inclined surface 16a between the lower end of the speed change operation lever 15 and the rear inclined surface 6a of the air cylinder 6. ! ! 16, the gear 16 is moved up and down by raising and lowering the speed change operating rod 15, thereby displacing the position of the air cylinder 6 in the axial direction and setting the desired rotation speed.

(2) - is an output side V pulley, and 18 is an output side fixed conical plate, which is integrally formed with a rotating shaft 19 that is fixed to the shaft of various machines. Reference numeral 17 denotes an output side movable conical plate facing the fixed conical plate 18, and is fitted onto the rotating shaft 19 so that it can freely slide in the axial direction. 24 is an air cylinder in which a piston 23 is inserted so as to form an output air chamber 25;
The piston 23 is mounted on a bearing fixed to the bearing 20.
The piston 23 and the movable conical plate 17 are connected to the movable conical plate 17 via the movable conical plate 17 so that the piston 23 and the movable conical plate 17 are fixed in the axial direction and interlock with each other while maintaining a free relationship in the rotational direction. Reference numeral 21 denotes a pressing spring, which is interposed between the spring receiver 22 at the end of the rotating shaft 19 and the boss portion of the movable conical plate 17 to press the output movable conical plate 17.
is pressed toward the fixed conical plate 18 side. The spring 21
A spring with a predetermined pressure that can transmit rotation is used, which is considerably weaker than the pressing force of the input air cylinder.

Reference numeral 26 is a magnetic valve on the output side; it is provided in connection with the air passage leading to the air chamber 25 of the air cylinder 24 on the output side, and when the solenoid valve 26 is turned on, air is sent into the air chamber 25 of the air cylinder 24 and output. The side E' stone 23 is configured to move the output side movable conical plate 17 to the fixed conical plate 18 side via the bearing 20, and the solenoid valve 26 is moved to the OF position.
By setting it to F, the air chamber 25 is opened and air is released to the outside, so that no air remains in the air chamber 25.

Note that 27 is a flow rate adjustment spindle facing the air passage. Reference numeral 28 denotes a speed change belt that is applied to the input side and output side V-pulleys v1 and v2.

In the above configuration, when speeding up to a set rotational speed, the solenoid valve 12 of the input end air cylinder 6 is turned on by an external command, thereby feeding air into the input air chamber 8 and moving the input side piston 7 into the fixed conical cone Fi, 2. The cylinder moves towards the end of the cylinder and reaches the set maximum rotation speed. On the output side, the 1m valve 26 is turned OFF to release air, and the output side movable conical plate 17 is separated from the output side fixed conical plate 18 by the tension of the speed change belt 28. At this time, the output air chamber 25 is open, and there is no resistance to the movement of the output side movable conical plate 17.

Furthermore, since the spring 21 is made to have a considerably weaker pressing force than the input side air cylinder 6, the side pressure applied to the speed change belt 28 does not increase even if the speed is changed instantaneously.

Therefore, even if the input ':4 magnetic valve 12 is turned on and the gear is changed instantaneously, the output rotational speed will not vary and an accurate rotational speed will be obtained.

Next, when decelerating to the lowest speed, an external command is applied to the output solenoid valve 26.
is turned on, air enters the output air chamber 25, and together with the action of the pressing spring 21, the output side piston 23 forcibly presses the output side movable conical plate 17 toward the fixed conical plate 18. At this time, the input solenoid valve 12 is turned OFF, the input air chamber 8 is opened, and the input movable conical plate 1 is separated from the fixed conical plate 2 by the tension of the speed change belt due to the pressure of the output side movable conical plate 17, and the input movable conical plate 1 is moved away from the fixed conical plate 2. It opens instantly until it hits the low-speed stopper 4, and the rotational speed becomes the lowest speed. In this case as well, since the input movable conical plate 1 is not pressed toward the fixed conical plate, no unnecessary lateral pressure is applied to the speed change belt 28 even during instantaneous deceleration.

In addition, when converting the set rotational speed to high speed or medium speed, etc., raise and lower the speed change operation rod 15 to raise and lower 11116, and adjust the axial position of the air cylinder 6 with the inclined surface 16a of the wedge. , the set rotation speed is set by increasing or decreasing the stroke of the piston 7 to the cylinder end.

That is, in FIGS. 1 and 2, the gear change operation lever 15 is rotated and lowered to #I! 16 is pressed to move the air cylinder 6 to the left and set it to the high speed rotation position. In FIG. In FIG. 2, the stopper 9 of the piston 7 hits the cylinder end and the belt 28 is at the maximum rotation speed set at high speed. Furthermore, FIGS. 3 and 4 show the case where the gear shift operating rod 15 is rotated in the opposite direction and raised to slightly raise the draft 16, and the air cylinder 6 is moved to the right to set it at a medium speed rotation position. In Fig. 3, the movable conical plate l hits the stopper 4 of the rotating shaft 3 and the belt 2
8 is at the lowest speed position, and in FIG. 4, when the stopper 9 of the piston 7 hits the cylinder end, the belt 28 is at the maximum rotation speed set at a medium speed.

By setting the position of the air cylinder to the desired set rotation speed using the speed change operating device 2, the speed can be instantly increased to the set rotation speed when increasing speed, and the lowest speed of the transmission can be achieved when decelerating. It is something that can be slowed down.

〔Effect of the invention〕

According to this invention, air is alternately supplied and discharged from the air cylinder by opening and closing the input side and output side solenoid valves in response to an external command, so that when increasing speed, the input side piston is instantly moved to the cylinder end to reduce the rotation speed. The speed can be increased to the correct set rotation speed without causing any variation, and when decelerating, the speed can be set to the lowest speed by instantaneously moving to the sliding end of the movable conical plate on the input side, and the set rotation speed can be easily adjusted using the speed change operation device. It can be set to the desired maximum rotation speed.

Therefore, according to the present invention, it can be used to adjust the start and stop of machines that require rapid deceleration on a regular basis, such as flaw detectors, inspection machines, and complex processing machines, and machines with large inertia. This system instantly decelerates the transmission using external commands such as a computer, controls clutch OFF and brake ON, and performs quantitative filling, fixed position stop control, etc. with high precision and high frequency, which is unprecedented. It is possible to provide new functionality in areas where it was previously possible.

[Brief explanation of drawings]

1 to 4 show an embodiment of the transmission according to the present invention, and FIGS. 1 and 2 show the case where the transmission is set at a high speed rotation position, and FIG. The figure is a cross-sectional view at the set rotation speed, Figures 3 and 4 are at the medium speed rotation position, Figure 3 is a cross-sectional view at the lowest speed, and Figure 4 is at the set rotation speed. FIG. ■1... Input side variable speed V pulley, V,... Output side variable speed V pulley, l... Movable conical plate, 2... Fixed conical plate,
4...Low speed side stopper 6...Input side air cylinder, 7...Piston, 8...Air chamber, 9-...
Speed-increasing side stopper, 12... Solenoid valve, 17... Movable conical plate, 18... Fixed conical plate, 23... Piston,
24... Output side air cylinder, 26... Solenoid valve,
A...speed change operation device. Patent applicant Sakai Seisakusho Co., Ltd. Figure 1 Figure 3 Figure 2 Figure 4

Claims (2)

[Claims] (1) Input side speed change V pulley (V
An air cylinder with a piston (7) inserted between the movable conical plate (1) of _1) and the speed change operating device (A), which can be moved throughout the speed change range by supplying and discharging air by opening and closing a solenoid valve (12), etc. (6) and output side variable speed V pulley (V_2)
The bearing of the movable conical plate (17) is equipped with an air cylinder (23) that can turn on and off the pressing force on the fixed conical plate by supplying and discharging air by opening and closing a solenoid valve (26), etc., and can input and output according to external commands. By alternately supplying and discharging air from the side air cylinders, the speed on the high speed side is increased to the cylinder end, and the speed on the low speed side is decelerated to the sliding end of the movable conical plate on the input side, making it possible to increase and decelerate instantly. A transmission featuring: (2) The set rotation speed of the transmission is adjustable by adjusting the axial movement position of the air cylinder (6) connected to the movable conical plate by the speed change operation device (A), and the set rotation speed can be set. Device.