SU1498644A1 - System for clutch - Google Patents

Abstract

This invention relates to friction clutch drives for passenger cars and light trucks. The purpose of the invention is to simplify the design. The friction clutch contains a flywheel 1, a driven disc 2 placed between the flywheel and the pressure disc 3, the lever 4, the measles 5 electromagnet placed on the input shaft 6. The friction clutch allows you to significantly simplify and facilitate driving, in particular, to more fully utilize the possibility of driving car by inertia. 3 hp ff, 2 ill.

Description

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The invention relates to the field of mechanical engineering and can be used in vehicle transmissions to control friction clutches.

The aim of the invention is to simplify the design.

FIG. 1 shows a schematic diagram of a friction clutch with an electromagnetic control drive; in fig. 2 is an electrical schematic diagram of the clutch control system.

The friction clutch contains a flywheel 1, a driven disc 2 placed between the flywheel 1 and the pressure disc 3, the lever 4, the measles 5 electromagnet placed on the primary shaft 6. The anchor 5 in longitudinal section has a T-shape. The anchor 5 is mounted on the primary shaft 6 and can freely move on it. In the disc core 5, two or three holes 7 are machined, covered with valves 8 on the outside. The material of core 5 is low carbon electrical steel.

The magnetic core 9 in longitudinal section resembles a glass with a central hole in the bottom. An end of the core 5 is placed in this hole with a gap of up to "0.1 mm. The magnetic core 9 is installed in the housing 10, which is rigidly connected to the clutch housing and made of a nonmagnetic - HOi o material. The casing overlaps with the visor the end of the disk core 5 and forms an air gap of 11, with the disk core 5 on the outer side having annular channels forming the labyrinth sealing of the gap.

The excitation winding 11 for greater compactness is made of square square copper wire and consists of three to four coils connected in parallel and glued into the inside of the magnetic core 9.

The valves 8 can have a different design and are designed to close the holes 7 made in the disk core 5 when the clutch is engaged. The valves (Fig. 1) of the plate type are installed with respect to the vertical plane of the disc core 5 at an angle φ and weights are carried at the free end.

Plate 12 transmits the pressure of the rod core 5 to the heads of the levers 4. This plate is made of a nonmagnetic material.

The operation of the friction clutch with an electromagnetic drive proceeds in the following sequence.

When transmitting torque from the engine to the gearbox, excitation winding 11 is disconnected - the electromagnetic drive does not work. The pressure disk 3 is pressed against the slave disk 2 by springs (not shown).

A current is supplied to the field winding 11 to disengage the clutch. Originated with

In this case, the magnetic flux, shorting through the bark 5, the magnetic core 9 and the gaps Dj and L2, causes the bark 5 to move from right to left. This movement is transferred to the heads of the levers 4 through the support plate 12. The levers 4, turning around the axes O, move the pressure disk 3, releasing the driven disk 2.

When moving cor 5 from right to left

the air in the cavity of the electromagnetic drive, almost without any outside, exits mainly through the channels and partially through the gaps To and Dz.

To engage the clutch, excitation winding 11 must be de-energized. As a result, the magnetic force applied to the core 5 disappears, which causes the latter to move from left to right. However, this movement is more slow compared to the previous one. This is due to the presence of gap P1 in the cavity of the drive.

The action of the valves 8, which influence the magnitude of the vacuum in the actuator cavity, depends on the number of revolutions of the core 5. The valve 8, mounted at an angle φ to the vertical plane of the core, tends to be affected by

5, the centrifugal force applied to the weights installed at their ends is straightened and this weakens the sealing of the cavity. The smaller the revolutions of the core 5, the slower the engagement occurs. Basic electrical circuit

0 of the control system includes the excitation winding of the electromagnetic clutch actuator: switch 13, normally closed -. Contact 14, associated with the gas pedal, switch 15 with contacts 16 and 17, associated with the clutch pedal, is normal

5 closed contact 18 associated with the brake pedal, contact 19, minimum idling relay, clutch pedal spring 20.

The drive winding 11 is connected to

0 battery in ignition key position. However, the current through the winding 11 is not, because the switch 13 is turned off. To disengage the clutch, it is necessary to press the clutch pedal to start and warm up the engine. This leads to

5 breaking the contacts 16 and to turning on the contacts 17, the current through the winding 11 flows and the clutch disengages.

In the future, all the necessary manipulations are performed in the same way as in the presence of a regular clutch with the only

 the difference that smooth coupling is required is provided automatically.

The electrical circuit, however, also permits a second driving mode, conventionally referred to as automatic. This mode should be used with relatively good road conditions.

A driver wishing to use the second electrical circuit option

after starting and warming up the engine, turn on switch 13. This leads to the supply of current to the excitation winding 11 with a free clutch pedal, which is no longer necessary, and to automatically disengage the clutch. Now, to start off the car, press the gas pedal gently enough: contacts 14 are broken, winding 11 is de-energized and the clutch is smoothly turned on in opposition to spring 20. It is advisable to use this method for relatively short descents.

Claims (4)

1. A clutch control system comprising rigidly associated with a housing .. .... „Electromagnet electrically connected thanks to the damping action through a switch-over battery system installed in the cavity of the electromagnet, movable in axial directional pressure in the cavity of the drive. Continuing disengagement (de-energizing winding II) occurs all the time. when releasing the gas pedal and engaging the measles interacting with the clutch levers, different from that. - when you press this pedal. As a result, 15 h ™ is the purpose of simplifying the design, as mentioned, any possibility of a car rolling forward (by inertia) is automatically used, although there is no overrunning clutch in the transmission of the car. When the car is braked, i.e., when the brake pedal is pressed, the contacts 18 break, the excitation winding 11 is de-energized and the clutch connects the engine to the transmission. Thus car braking always happens. 20 The electromagnet and measles are mounted coaxially to the driven clutch shaft, the measles being mounted on the shaft with axial and angular movement and having a T-shaped cross section, forming a cavity with the electromagnet body connected to the atmosphere through a gap formed between the magnetic casing and the end face of the core. 2. The system of claim 1, wherein Determined by the resistance of the spring 20. In this way it is advisable to use with relatively short descents. Invention Formula measles, interacting with clutch levers, characterized in that. 0 The electromagnet and measles are mounted coaxially to the driven clutch shaft, the measles being mounted on the shaft with axial and angular movement and having a T-shaped cross section, forming a cavity with the electromagnet body connected to the atmosphere through a gap formed between the magnetic casing and the end face of the core. 2. The system of claim 1, wherein with the dvig- 25 disk connected to the transmission box, the holes are made. telem. To prevent the engine from stalling by the end of the braking, the circuit provides a minimum idle relay 19. Its contacts are closed by sealing cavity through the valve with the atmosphere, and along the end of the bore sealing ring grooves are made. 3. The system of PP. 1-2, characterized in that the valves are made in the form of flattening of the minimum allowable rotations with weights that bend when increasing steady idle, through current and plate rotation, we increase the current 11 and the engine shuts off - in the flow area of the holes, with from the transmission. 4. The system of PP. 1-3, different with On steep descents, the large long-term that the free end of an associated with exactly braking a car with a motor battery excitation winding The gate is made by disconnecting 35 the electromagnet is connected to the ground through the gas pedal lock switch. Another way is possible, consisting in weakly pressing the clutch pedal so that one contact opens and the other contacts remain open at the clutch pedal {is for 40 this goal some free play). This method also leads to de-energizing the excitation winding 11, i.e., to enable the coupling. Said intermediate clutch position, the driver may have an easily opalescent electrical circuit, one branch of which contains a switch and contacts that react to the position of the gas, clutch and brake pedals, and the other branch contacts that react to the position of the clutch pedal and the engine crankshaft frequency the clutch-related contacts of both branches are connected to each other on the side of the brake pedal contacts and the engine crankshaft rotation frequency contacts. The electromagnet is connected to the mass through a branching electrical circuit, one branch of which contains a switch and contacts that react to the position of the gas, clutch and brake pedals, and the other branch contains contacts that react to the position of the clutch pedal and the rotational speed of the engine crankshaft, which are connected to the coupling are connected to each other from the side of the brake pedal contact and the frequency of rotation of the engine crankshaft. Pedal linked l Gas pedal Pedal linked Fnopnosa pedal  Rig. 2