JPH0361703A - Collaboration position selecting type double cylinder - Google Patents

Abstract

PURPOSE:To realize a large output regardless of the positions of the reciprocating stroke by penetrating and coupling the rod of a main piston into the center hole of the rod of an auxiliary piston protruded to the outside of a cylinder, and providing a coupling means with the main rod on the rod tip side of the auxiliary piston. CONSTITUTION:A through hole is provided on the rod 8 of an auxiliary piston 7 penetrated to the outside of an auxiliary cylinder 2, the rod 11 of a main piston 10 is coupled and penetrated into it, and the auxiliary cylinder 2 and a main cylinder 1 are connected in series. An eccentric hole 14 to the rod 11 is provided in a case 13 fixed at the tip of the rod 8, an eccentric ring 15 is inserted into it, two levers 16 are connected to the upper section, a cylinder 19 is fixed on one lever 16, the rod 21 of a piston 30 is fixed on the other lever 16, and the main and auxiliary rods 8 and 11 are coupled or released. A large output is obtained at the time of starting by the collaboration of the main and auxiliary pistons 10 and 7 regardless of the positions of the advance and retreat, and a heavy object can be easily and quickly driven.

Description

Detailed Description of the Invention A1 Objective of the Invention (Field of Industrial Application) The present invention is a cooperative position-selectable double cylinder used in the fluid pressure actuated equipment industry. This invention relates to a double cylinder that allows main and sub pistons to work together to obtain a large operating force and easily and quickly reciprocate a heavy driven object.

<Prior Art> Conventionally, as shown in Figure 3 of the drawings, two main and sub cylinders 24 and 25 each having pistons 22 and 23 installed therein were arranged in series.
A double cylinder is known in which a rod 26 extending out of the cylinder 24 is attached to the piston 22 on the main cylinder 24 side, and a rod 27 whose tip is in contact with the piston 22 of the main cylinder 24 is attached to the piston 23 of the sub-cylinder 25. It is.

<Problem to be solved by the invention> The conventional double cylinder described above has two cylinders in the forward stroke.
When two pistons 22, 23 are oscillated, both forces are transmitted to the rod 26, so that in the range of the stroke of the secondary cylinder 25 twice the power is obtained at the same pressure, and in the remaining strokes half the power is obtained. It has the characteristic of being an output.

However, the above-mentioned characteristics cannot be obtained at all positions during the movement stroke of the piston 22, 23, so even in the backward stroke, a large starting force is required at the beginning, and thereafter it is sufficient to continue the movement with a small force. There was a problem that it could not be used for reciprocating operation of a heavy driven object.

The present invention was made in accordance with this current situation, and includes providing a center hole in a double rod-shaped sub-piston fitted into a sub-cylinder.
The rod of the main piston fitted into the main cylinder is passed through this center hole, and the engaging/disengaging means provided at the tip of the sub-piston is engaged and disengaged with this rod, thereby adjusting its position during the reciprocating stroke. The main and sub-pistons work together to obtain a large output and ensure reliable operation of the driven object, and the cooperative position can be freely set to any position during the stroke to reduce the load on the driven object. It is an object of the present invention to provide a cooperative position selection type double cylinder that can stably and reliably reciprocate the body.

1. Structure of the Invention (Means for Solving the Problems) The means of the present invention for achieving the above object is to arrange a main cylinder with a long stroke and a sub cylinder with a short stroke in series. A sub-piston with a rod that extends out of the cylinder is fitted into the main cylinder, and a main piston having a rod that passes through a center hole provided in the sub-piston and the rod and extends out is fitted into the main cylinder. The cylinder has a cooperative position selection type double cylinder structure with a means for engaging and disengaging with the main rod attached to the distal end of the rod.

(Function) The cooperative position selection type double cylinder configured as described above can be operated by removing the locking and disengaging means provided at the tip of the rod of the sub-piston from the rod of the main piston, and inserting the cylinder into the chamber behind or in front of the main cylinder. When fluid is supplied to the auxiliary piston, the main piston moves and its rod moves the driven object.However, if the main piston rod is applied with a locking/disengaging means, the main piston rod and the sub piston rod are coupled and stopped together by the brake. If fluid is supplied to the main and sub cylinders in this state, the main and sub pistons will work together to generate a large operating force, which will cause the driven object to move. Now you can move it.

Therefore, only when a large operating force is required, such as when moving a stationary and heavy driven object by overcoming inertia, or when the load on a moving driven object increases, the main/secondary The required operating force is obtained by the cooperation of the main piston and sub-piston, and when a large operating force is not required, the rods are uncoupled by the locking/disengaging means and only the main cylinder is operated. By doing so, the motive power can always be used effectively without loss, and the reciprocating operation of the driven body can be performed reliably and with high efficiency.

(Example) Hereinafter, an example of a cooperative position selection type double cylinder according to the present invention will be described based on the drawings.

In Figure 1 of the drawings, 1 and 2 are main and sub cylinders, and the main cylinder 1 has a length that provides the required stroke to the driven body, and is formed in a cross-sectional area that provides an output that matches the rated load of the driven body. The sub cylinder 2 has a length that matches the stroke at the starting end which requires a large starting force during the stroke, and has a cross-sectional area (smaller than the main cylinder) that can obtain the force necessary to compensate for the lack of output at the time of starting the main cylinder ■. The cylinders 1 and 2 are arranged concentrically in series, and the fluid inlets and outlets 3 and 4 are provided before and after the main cylinder 2, and the sub cylinder 2 is
Fluid inlets and outlets 5 and 6 are provided at the front and rear of the tube, respectively.

Reference numeral 7 denotes a sub-piston that fits into the above-described sub-cylinder 2 and hermetically divides the inside into two chambers, one of which is connected to the cylinder 2.
A rod 8 extending to the outside is provided, and a center hole 9 is provided through the center of the piston 7 and rod 8, into which a rod of a main piston, which will be described later, is inserted.

Reference numeral 10 denotes a main piston that is fitted into the main cylinder 1 and whose interior is airtightly divided into two chambers, front and rear. and a rod 11 whose tip protrudes beyond the rod 8.
A screw 12 is provided at the tip of the rod 11 to connect a driven body (not shown).

a is the rod 8 of the sub-piston 7 and the rod 11 of the main piston
A hole 14 eccentric to the other rods 11 is provided in the case 13 fixed to the tip of the rod 8, and a hole 14 is provided in the chain hole 14 to serve as a means for engaging and disengaging the rod 8. Two eccentric rings 15 and 15 are fitted, levers 1B and IE) are connected to the top of each ring, and a cylinder 19 with fluid inlets and outlets 17° and 18 on the outside and inside is fixed to one of the levers 16. , the piston 20 is fitted into this cylinder 19, and the rod 21 is connected to the other lever 1.
6, when fluid is sent to the cylinder 19 from the outer inlet/outlet 17, the eccentric ring 15.15 inserts between the rod 11 and the case 13 and tightens the rod 11, so that the rods 8 and 11 play. %a, the main and sub pistons 7.10 are made to cooperate, and when the fluid is released from the inner inlet/outlet 18, the eccentric ring 15.15 returns to the opening/end 11. In order to release the tightening, the port 11 is configured to be detached from the port 8 to allow the main piston 10 to operate independently.

In the cooperative position selection type double cylinder shown in the above embodiment, when the main and sub pistons 10 and 7 are stopped at the end of the backward stroke, the outer inlet/outlet 17 is opened to the cylinder 19 of the brake a as the engagement/disengagement means. Fluid was sent from Then, the eccentric ring 15.15 operates to tighten the opening/end 11, causing the rods 11 and 8 to play. -a, the main and sub pistons 10 and 7 are in a state of cooperation. Therefore, when fluid is supplied to the main and sub cylinders 1 and 2, the main and sub pistons 10 and 7 work together to move the driven object, so the driven object overcomes the inertial force and begins to move easily.
At this time, fluid is sent from the inlet/outlet port 18 to the cylinder 19 of the brake a, the eccentric ring 15.15 is operated in the opposite direction to that described above, and the rod 11 is released from the rod 8. When the supply of the auxiliary piston 7 was stopped, only the main piston 10 moved, moving the driven body to the end of its stroke.This operation was performed in the same way during the backward stroke of the driven body.

In addition, although the starting force at the beginning of the driven body's stroke is not large, the load increases during the stroke and it becomes difficult to operate with the main piston 10 alone.
, the rods 11 and 8 are connected to create a cooperating posture between the main and sub pistons 10 and 7, and both main and sub cylinders 1°2
The driven body is operated by the cooperation of the piston 10.7, and when the load is reduced, the brake a is released, the sub-piston 7 is stopped, and the driven body is operated by the main piston 10 alone. As a result, it was possible to reciprocate the driven body reliably without wasting power.

C.9 Effects of the Invention The cooperative position selection type double cylinder according to the present invention can be adjusted to a position where the main and sub pistons are moved together in both the forward and backward strokes of the pistons by adjusting the operating timing of the engaging and disengaging means.
(Time)> (E) to obtain a large output at startup to easily move a heavy driven object by overcoming inertia, or to respond to a driven object whose load increases in the middle of the stroke. If suitable performance is demonstrated to apply a force to ensure stable movement, and if the driven object starts or the load is reduced so that a small force is sufficient, then only the main piston can be used. Since the robot can be operated at an increased moving speed, reciprocation of the driven object and similar operations can be performed easily and quickly.

By adjusting the brake activation timing, it is possible to change the position where the main and sub pistons cooperate and the position where they release the cooperation, so it can be used universally in applications requiring two-stage output.

It has the following unique effects.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of a cooperative position selection type double cylinder according to the present invention. FIG. 2 is a longitudinal sectional front view of the brake device in the same as above. FIG. 3 is a longitudinal sectional front view of a conventional double cylinder. 1: Main cylinder 2: Sub-cylinder 7: Sub-piston 8: Rod 10: Main piston 11: Lot a: Engagement/disengagement means dispatch pin 1) Water supply 0 Ward procedure amendment agent) September 8, 1999 Heisei Patent Application No. 196386, Title of Invention, Cooperative Position Selection Type Double Cylinder, Relationship with Amendment Case Patent Applicant Postal Code
424 Address Name: Nobuaki Sugimura, No. 3-27, Umasashi Kita, Shimizu City, Shizuoka Prefecture 61 Drawing 3

Claims (1)

[Claims] A main cylinder with a long stroke and a sub-cylinder with a short stroke are arranged in series, a sub-piston whose rod extends outside the cylinder is fitted into the sub-cylinder, and the above-mentioned sub-piston and its rod are provided in the main cylinder. Cooperative position selection characterized in that a main piston is fitted with a rod provided with a rod passing through a center hole and extending out, and a means for engaging and disengaging from the main rod is attached to the tip side of the rod of the sub-piston. double cylinder shape.