RU2360138C1 - Remote control mechanism of piston engine - Google Patents

Abstract

FIELD: motors and pumps.

SUBSTANCE: implementation of the disclosed technical solution allows for controlling engine speed in a smooth manner and simplifying structure significantly. The remote control mechanism of piston engine contains housing, control handle installed on rotation axis, and tension rod, which links control handle with a speed governor loaded with recoil spring. The mechanism is provided with a compression spring, which is installed on the tension rod in free contact with the control handle and rests against the housing. The compression spring ensures control handle fastening to the housing by its height and, simultaneously, retains governor in idling positions by proper efforts. The recoil spring is formed by preliminary loading, which securely prevents control handle from rotation; thereby recoil spring effort is less than compression spring effort.

EFFECT: improved easiness of operation and simplified structure.

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Description

The invention relates to the field of mechanical engineering, in particular to small-sized agricultural tillage machines with a remote control system for a piston engine, and can be used in machines such as cultivators, walk-behind tractors, mowers.

The known control mechanism includes a control handle mounted on an axis of rotation, connected by a thrust to the engine lever, a return spring (RF Patent No. 2164611, MKI F02D 9/10, publ. 2001.02.10).

The closest set of essential features is the control mechanism, comprising a housing, a control handle mounted on the axis of rotation, connected by a thrust to the engine speed regulator, spring-loaded with a return spring (Tarpan cultivator, Operating manual 093400000 RE. Tula, p. 4 p .1.5; p. 6 p. 3.4, p. 15 fig. 7; p. 16 fig. 8a, 8b).

A disadvantage of the known control mechanisms is that these structural schemes differ in their complex design due to the need to use additional components, which leads to inconvenience in operation and the cost of the engine itself.

The technical result achieved by this invention is to improve ease of use and simplify the design.

The specified technical result is achieved by the fact that the known remote control mechanism of the piston engine, comprising a housing, a control handle mounted on the axis of rotation, and a thrust connecting the control handle with a spring-loaded return spring, is equipped with a speed controller mounted on the rod in free contact with the control handle and with focusing on the housing by a compression spring, which ensures the fixation of the control handle with its height and at the same time, by the force holding the regulator in the “idle” positions, and preload spring formed guaranteed retention knob from rotating, the force of the return spring is less than the compression spring.

In addition, the technical result is also achieved by the fact that:

- the preload of the return spring is formed by the force providing its reciprocating deformation along the initial height within the working strokes of the controller relative to its idle position,

- the compression spring and the end of the control handle mounted on the axis of rotation are placed inside the housing, the free end of the control handle being brought out through the longitudinal window formed in the housing within the working stroke of the control handle with respect to its idle position.

The invention is illustrated by drawings, where:

Figure 1 shows a kinematic diagram of a mechanism for remote control of a piston engine, the position "idle";

figure 2 is the same, the position of "maximum speed";

figure 3 is the same position "stop".

The control mechanism consists of a housing 1, mounted on the steering wheel 2, a control knob 3, a rod 4, connecting the control knob with the speed regulator 6 mounted on the engine 5.

The control handle is made in the form of a single-arm lever, one end of which, located inside the housing, is mounted for rotation around the axis of rotation 7. The other end of the control handle is free and is located outside. To exit the free end of the control handle in the housing, a longitudinal window 8 is made with a length equal to the full working stroke of the control handle.

The rod is made in the form of a metal bar and is enclosed externally with the possibility of reciprocating movement in a rigid steel shell 9. A compression spring 10 is installed on the rod inside the housing, freely resting against one end of the housing against the end wall of the housing, and the other end into the end of the control handle mounted on the axis of rotation . The height of the compression spring in the free state corresponds to the initial position of the idle control knob. The speed controller, made in the form of a two-arm lever, is mounted to rotate around the axis of rotation mounted on the engine 11. The controller is spring-loaded with a pre-loaded return spring 12, the height of which corresponds to the initial position of the controller at idle. The preliminary force of the return spring provides reciprocating deformation of the return spring along its initial height, equal to the working strokes of the regulator relative to its initial position (position "idle speed"). In addition, the control knob for the force of the return spring is guaranteed to be held on the compression spring in the “idle” position and at the same time is prevented from rotating about its axis of rotation with the condition that the force of the return spring is less than that of the compression spring.

The clutch control mechanism operates as follows.

In the initial position of the control mechanism, which corresponds to the disengaged clutch and the running engine 5, the control knob 3 is in free contact with the compression spring (figure 1, the position "idle").

To engage the clutch after starting the engine 5, the control knob 3 is moved up with its simultaneous rotation on the axis 7 counterclockwise from the "idle" position to the highest position, i.e. all the way to the upper wall of the longitudinal window 8. In this case, the control handle comes out of contact with the compression spring 10. When moving the control handle, the rod 4 is pulled out of the shell 9, entraining the regulator 6, which, rotating around the axis 11 in the direction opposite to the rotation of the handle control, will leave its initial position in the direction of maximum speed, loading the return spring 12 in tension by the magnitude of the stroke of the control handle. The fuel supply increases, respectively, the engine speed rises. 5. The clutch engages (figure 2, the position of "maximum speed").

Having released the control knob 3, under the action of unloading the return spring, the regulator 6 will return to the initial idle position. The fuel supply decreases, the engine rpm 5 decreases accordingly. When the regulator 6 is moved, the rod 4, being pulled back into the shell 9, turns the control knob 3 down, and since the force of the return spring 12 is less than the force of the compression spring 10, the control knob, having reached the contact with the end of the compression spring will be held in this position by the initial setting force of the return spring.

To turn off the engine 5, the control knob 3 is moved from the "idle" position by rotating clockwise around the axis to the lowermost position, i.e. all the way to the bottom wall of the longitudinal window 8. In this case, the control knob 3, loading the compression spring 10, pulls the rod 4 back into the shell 9. The regulator 6 turns counterclockwise to the side, loading the return spring already by compression by the amount of the operating stroke of the control knob.

When moving the regulator, the fuel supply is limited and the engine switch (not shown) trips. In the lowermost position of the regulator, respectively, and the control knob in the window of the housing, the engine stops (Fig.3, stop position).

Having released the free end of the control handle 3, under the action of unloading the compression spring, the control handle returns to the "idle" position. The compression spring 10 will stand in its free state, and the position of the control handle 3 is fixed by the force of the return spring 12.

The implementation of the proposed technical solution will allow you to smoothly adjust the engine speed, greatly simplify the design.

Claims (3)

1. The mechanism for remote control of a piston engine, comprising a housing, a control handle mounted on the axis of rotation, a rod connecting the control handle with a spring-loaded return spring speed regulator, characterized in that it is equipped with a mounted on the rod in free contact with the control handle and with focus the housing by a compression spring, which ensures the fixation of the control handle with its height and at the same time the force holding the regulator in the idle position, and the return spring is formed by preliminary with a load guaranteeing that the control handle is kept from rotation, while the force of the return spring is less than that of the compression spring. 2. The mechanism according to claim 1, characterized in that the preload of the return spring is formed by a force that provides reciprocating deformation along its initial height within the operating strokes of the regulator relative to its idle position. 3. The mechanism according to claim 1, characterized in that the compression spring and the end of the control handle mounted on the axis of rotation are located inside the housing, while the free end of the control handle is brought out through the longitudinal window formed in the housing within the working stroke of the control handle relative to its position single turns.

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