JPS60249703A - Remote control hydraulic emitter with flow rate increaser - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a remote control hydraulic emitter equipped with a flow rate amplification device. Used as a circuit.

(Prior Art) Conventionally, with regard to remote control hydraulic circuits, the user operates a lever or key, which is first activated by a receiver device. A type is mentioned which is arranged to initiate the desired switching within the operating hydraulic circuit. These devices often consist of a hydraulic vise or hydraulic morph that can be more or less remote from the control post.

Most of the above devices known today have various drawbacks, including:

Since zero equipment requires too long a response time, the hydraulic flow delivered to the utilization equipment is relatively small.

0 Adjustment flow rate has a large effect on heat generation C.

This results in excessive heating.

〇 Even if the adjusted flow rate is large, the response time of the equipment cannot be shortened sufficiently.

(Problems to be Solved by the Invention) It is an object of the present invention to provide a remotely controlled hydraulic emitter with a flow amplifier which can eliminate all of the above-mentioned drawbacks. The purpose is to be highly evaluated as a hydraulic circuit used for vehicle control.

(Means for solving all the problems) The remote control hydraulic emitter according to the present invention has at least two stages, namely, an oil field potentiometer (POTENT
A control stage with sliding pistons operating according to the known principles of IOMETER) and a control stage with sliding pistons operating according to the known principles of
A further feature of the invention is characterized in that the distribution piston, which is connected to the device in use and which ensures flow communication, includes a power stage or an amplification stage with a slider. Each piston of the potentiomake stage has a cylindrical shape with extraction type at both ends, and its tapered center part has a di7bolo (DIA)
It has the general shape of BOLO). That is, the central narrow diameter section is connected to the inner cylindrical end of the piston via a frustoconical transition region. Another feature of the present invention is that the central narrow cross section of the piston A narrow diameter section with a longitudinal passage provided inside the piston and directed towards the corresponding piston of the power stage or amplification stage for opening at one of its ends l/(& It is equipped with an opening that communicates with the

(Example) An example of the present invention will be explained below based on the attached drawings.
The present EA is not limited to this example.

The embodiment diagram shows a control box of the type that is installed in a prime mover used, for example, in civil engineering work.A swinging control lever 1 is placed on top of the box, and the base of the lever l is placed on top of the box. is equipped with a push plate 2. The push plate 2 is pressed when the lever l swings.

One or more movable control pistons (3) disposed below the piston (3) are configured to be pressed down appropriately against a spring (4).

In this embodiment, the control piston 3 slides inside a block forming a control stage 5, while below the control stage an output stage (amplification stage) 6 is provided. Furthermore, each piston 3 is configured to operate according to the known principles of hydraulic potentiometer making. That is, each piston 3
has two cylindrical ends 8, 9 of both t@VC extraction type, and also.

Each piston 3 has three throats of the stator, namely a central throat 11 for control, a pressure supply throat 12 connected to the hydraulic source center 13vc, and a return throat connected to the hydraulic crotch return circuit 15vc. The T/C is assembled so as to move in front of the section 14 and slide in the direction of the arrow 10.

The piston 3 has two frustoconical transition regions 16, 17.
is provided between the narrow diameter part 7 and the cylindrical end part 8.9,
Is this a major advance in the operation of hydraulic potentiometers?
bring.

The narrow diameter portion 7 also communicates with an axial passage 19 of the piston 3 by an opening 18, which passage 19 communicates with the corresponding part of the output stage (also the amplification stage) 6, especially the output piston 21. It opens into a chamber 20 which acts on the head.
Each output piston 21 slides within the stake of the output stage 6, which output stage includes:

A throat section 22 connected to a return circuit 23 for 0 oil pressure; an output supply throat section 24 connected to a hydraulic source center 25 for an O output;
0 end chamber 26° directly connected to the utilization circuit, i.e. the receiver device (prime mover or vise) of the installation; each output piston 21 slides along a sealed cylindrical bearing inner surface; A narrow diameter portion 27 is provided in the middle of each piston 21. This narrow diameter portion 27 is provided with an opening 28,
The entire opening 28 communicates with the chamber 26 through its narrow diameter portion 27' (continuing with the passage 4 penetrating in the i-axis direction).

Next, the entire operation will be explained based on the above configuration.

Control lever 1t - swings, spring 4 via push plate 2
When the piston 3 is moved against the action of.

The pressure supply throat 12 of the piston is connected to the control central throat 11 and the return throat 14. Throat 12
The communication between the throat 11 and the throat 11 is made by a constriction with a variable cross-section formed by the frustoconical transition region 16 on the one hand, and the communication between the throat 11 and the throat 14 on the other hand is formed by a frustoconical transition region 16. This is accomplished by a variable cross-section gold biased constriction formed by the transition region portion 17 of the .

Thus, an injection member 30, such as an inlet injection valve with a variable cross section, is provided between the pressure supply throat 12 and the chamber 20;
Further, an injection member 31 such as an outlet injection valve with a variable cross section is provided between the chamber addition and return throat portions 14.

As described above, the hydraulic potentiometer is realized, and a simple explanatory diagram of the eighth drawing is shown.

Thus, the pressure supply throat section 12 is a supply source with a constant pressure. Starting from the hydraulic source center 13, a control pressure PC is thus obtained which lies between zero and the rated value of the throat 12, which is the pressure source. The variation of this control pressure PC as a function of the control piston 3 (or angle α of the lever 1) is shown in FIG.

For the graph of FIG. 9, a truncated cone-shaped transition region 16.
By determining the shape and dimensions of the generatrix 17, a desired contour shape can be obtained.

A chamber 2 in which the control stage 5 is provided in the head of the output piston 21
0, the piston 21 moves and establishes a full communication between the power supply throat U and the chamber 26, this communication being such that the control pressure PCPu in the chamber 20
is maintained as long as it is higher than the control pressure Pc within.

When the utilization pressure Pu becomes higher than the control pressure Pc, the piston 21 moves and completely cuts off the communication between the chambers 24 and 26. If this utilization pressure Pu continues to rise.

Piston 21 continues to move until both pressures PI and Pc are again in equilibrium, establishing communication between chamber 26 and return throat 22.

When the control stage 5 is deactivated, the piston 3 again assumes its rest position and the control pressure in the chamber 20 becomes zero. In this way, the corresponding utilization piston 21 is again in the rest position (FIG. 7) 9, in which position the utilization pressure in the chamber 26 is zero (!- by !-) in the chamber 26.
Become.

(Effects of the Invention) As is clear from the above detailed description, the remote control hydraulic emitter equipped with a flow rate amplifier according to the present invention can achieve the following effects.1. It is something that can be cleaned.

(1) Control of output stage (amplification stage)? This can be done with a small oil rEf:, flow rate, without disturbing the regulation curve, and therefore the regulation flow #? in the control stage. Excessive heat generation by keeping it small? It can be suppressed.

(2) Since the output stage (amplification stage) is not limited in terms of hydraulic pressure/7iil by the constriction provided on its piston, the hydraulic flow rate sent to the utilization equipment can be kept tight, and the response time is It can be significantly shortened.

[Brief explanation of drawings]

The drawings show all the embodiments of the present invention; FIG. 1 is a schematic cross-sectional view of the entire control post with two hydraulic stage metals stacked one above the other, and FIGS. Fig. 5 to 7 are explanatory diagrams showing the operation of the piston in the output stage (flow amplification stage) VC, Fig. 8 is a diagram of the operation principle of the control stage, and Fig. 9 is an explanatory diagram showing the operation of the piston. FIG. 3 is a curve diagram illustrating the characteristics provided by the stages; ]... Control lever, 2... Push plate, 3 - Piston. 4... Spring, 5... Control stage, 6... Output stage (amplification stage), 7... Small diameter portion, 8 and 9... Cylindrical end portion. DESCRIPTION OF SYMBOLS 10...Arrow, 11...Central throat, 12...Pressure supply throat, 13...Hydraulic power source center, 14 Return throat, 15 Return circuit, 16, 17...Truncated cone-shaped Transition region section, 18 opening, 19 passage, 20... chamber, 21... piston, 22... throat, 23...
Return circuit, 24... Output supply throat, 25... Oil field source center, 26... Chamber, 27... Small diameter part, 28... Opening, 29... Passage, 30, 31 Injection valve, etc. injection member,
Pc...control pressure. Pu... Usage pressure. Patent Applicant Punes Marel

Claims (3)

[Claims] (1) At least two stages, i.e. cylindrical ends (8), (9), on which a piston (3), operating according to the known principles of hydraulic potentiometers, slides, with extractable ends (8), (9); It has a shape, and the narrow center part is DIABOL.
O), the central narrow diameter part (7) is connected to the truncated conical transition region (A), and the two-way cylindrical end (3) of the biton (3) through Q71'e. 8), (9) A control stage (5) connected to VC and a power stage or amplification stage (6) on which a piston Qη slides, which is connected to the device of use, which ensures communication of the output and hydraulic flow of use. A remotely controlled hydraulic emitter comprising a flow amplifier. (2) Thinner cross section of piston (3)? The central narrow diameter part (7) with which the internal VC of the piston (3) is provided. and the corresponding piston (2) of the output stage or amplification stage (6).
A remote-controlled hydraulic emitter with a flow amplification device according to claim 1, characterized in that the opening communicates with the longitudinal passageway oriented towards )). . (3) Each piston (3) of the control stage (5) is connected to the output stage (6)
block arranged in the extension of the piston (c) of the block so that the output stage (6) is mounted opposite the block of the control stage (5) on the side opposite to the overall control lever (1). A remote control hydraulic emitter equipped with a flow amplifier according to claim 2, characterized in that it has the shape of: