Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D13/00—Friction clutches
  • F16D13/22—Friction clutches with axially-movable clutching members
  • F16D13/38—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs
  • F16D13/385—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs double clutches, i.e. comprising two friction disc mounted on one driven shaft

Definitions

• the present invention relates to a friction clutch used for a vehicle such as an automobile, and more particularly to a twin clutch (double disc clutch) having two clutch discs sandwiching an intermediate plate.
• Japanese Utility Model Laid-Open No. 61-89552 describes an example of a twin clutch to which the present invention is directed.
• a pin is attached to the outer peripheral portion of the intermediate plate in order to maintain a proper movement range of the intermediate plate even when the friction disc of the clutch disk is worn.
• the pin is connected to the intermediate plate via a frictional engagement portion, and the range of movement in the clutch axial direction is limited by the flywheel assembly.
• the intermediate plate moves backward only by a distance corresponding to the movement range of the bin, and in the clutch connection operation in which the friction is worn, the intermediate plate is driven by the pin. , And can be advanced to the position where it comes into pressure contact with the facing.
• the intermediate plate advances as described above, sliding resistance is generated at the engaging portion between the pin and the intermediate plate.
• the sliding resistance during forward movement is configured to be as small as possible, but for that purpose, the engaging part must be configured with relatively high precision: As the height increases, the sliding resistance may increase due to processing errors and the like. And if the drag is large, There is a possibility that the pressing force of the intermediate plate against aging (facing located between the intermediate plate and the flywheel) is insufficient, and the transmission torque by the first fusing may be reduced.
• the intermediate plate in the clutch connection operation, the intermediate plate remains stationary until the pressure plate presses the second fusing against the intermediate plate, and is pushed by the second fusing.
• the intermediate plate moves and presses against the first facing.
• the present invention arranges two clutch discs between a flywheel body of a flywheel assembly and a pressure plate, and arranges an intermediate plate between both clutch discs.
• the first and second elastic straps allow the intermediate plate and the press plate to be relatively non-rotatable and axially movable with respect to the flywheel assembly, respectively.
• a compression spring disposed between the intermediate plate and the pressure plate and extending substantially in the clutch axial direction. And location, by the above-described first and ⁇ second elastic strap and the compression spring mechanism, to maintain the pre-Tsu Shah plate and the axial position of the intermediate play Bok in clutch disconnected state to a constant It is characterized by doing so.
• the pressure plate in the clutch disengaged state, the pressure plate always retreats to a predetermined position, regardless of the amount of friction of the clutch disk, and the intermediate plate also moves to the predetermined position. (For example, an intermediate position between the pressure plate and the flywheel body). Therefore, the intermediate plate does not come into contact with the facing of the first or second clutch disc.
• FIG. 1 is a partially cutaway plan view of a twin clutch according to an embodiment of the present invention, as viewed from the outside in the radial direction.
• Fig. 1 two clutch disks 3 and 4 are arranged between the flywheel 1 and the pressure plate 2, and an intermediate plate 5 is arranged between both clutch disks 3 and 4. .
• the clutch disks 3 and 4 are provided with fusings 6 and 7 on the outer periphery, and the inner periphery is connected to the output shaft 8 (only the center line is shown) in a sliding manner only in the axial direction.
• flywheel 1 The outer periphery of flywheel 1 is more radially outward than clutch disk 3
• the flywheel ring 10 is fixed to the rigid Si on the outer periphery.
• the flywheel ring 10 is located radially outward of the clutch discs 3 and 4.
• a clutch cover 11 is fixed to a back surface of the flywheel ring 10 (an end opposite to the flywheel 1) by a bolt 12.
• the portion that comes into instantaneous contact with the clutch cover 11 is annularly continuous, and bosses 13 protrude integrally to the flywheel 1 from a plurality of circumferentially spaced portions of the annular continuous portion. ing.
• the flywheel ring 10 and the clutch cover 11 are rigidly fixed to the flywheel 1. Therefore, in this specification, the flywheel 1, the flywheel ring 10, and the clutch cover 11 are provided. Are collectively referred to as a flywheel assembly.
• bosses 15 are provided on the body to project radially outward between two adjacent bosses 13.
• a boss 16 protruding outward in the radial direction is integrally provided on the outer periphery of the pressure plate 2.
• a rivet 18 extending in the axial direction is attached to the boss 16, and one end of the second elastic strap 20 is fixed to the rear surface of the boss 16 by the rivet 18.
• the strap 20 extends generally in the tangential direction of the clutch, and the other end is fixed to the clutch cover 11 by a rivet 21 at the flywheel ring 1 ° and at the ⁇ of the clutch cover 11.
• the pressure plate 2 is connected to the clutch cover 11 so that it cannot rotate relative to the clutch cover 11 and moves in the axial direction.
• a compression conical coil spring 25 is interposed between boss 15 and boss 16. I have.
• the coil spring 25 has a center line (not shown) extending in the clutch axial direction, and a large-diameter end portion is seated on the front surface of the boss 16 around the head of the rivet 18.
• the small diameter end of the coil spring 25 is seated on the rear surface of the boss 15 around the head of the rivet 26.
• Rivet 26 is fixed to boss 15 in a concentric positional relationship with rivet 18.
• a compression conical coil spring 27 is interposed between the boss 15 and the flywheel 1.
• the coil spring 27 has a small-diameter end seated on the front surface of the boss 15 around the head of the rivet 26, and a large-diameter end seated on the end face of the flywheel 1.
• conical coil springs are used as the coil springs 25 and 27, but other compression springs can be used.
• the boss 15 is provided with an axially extending rivet 30.
• the rivet 30 provides a first elasticity to the front of the boss 15.
• One end of the strap 31 is fixed.
• the strap 31 also extends substantially in the tangential direction of the clutch, and the other end is fixed to the side step of the boss 13 by a bolt 32.
• the intermediate plate 5 is connected to the flywheel 0 by the strap 31 so as to be non-rotatable and movable in the axial direction.
• the pressure plate 2 is connected to a well-known control mechanism, that is, an urging mechanism and a release mechanism.
• a well-known control mechanism that is, an urging mechanism and a release mechanism.
• the press mechanism 2 is retracted to the disengaged position shown in the drawing, that is, a position not pressed against the fusing 7 by operating the release mechanism.
• the release mechanism is deactivated, so that the pressurizing force 2 urged by the urging mechanism ⁇ It advances to the connection position and presses the facing 7 against the intermediate plate 5 so that the intermediate plate 5 presses the facing 6 against the flywheel 1 (flywheel body).
• the elasticity characteristics of the above-mentioned parts, especially the spring mechanism (coil springs 25, 27) and the strap 20.31, are set so that the respective parts operate as follows in response to the connection / disconnection operation described above. I have.
• the pressure plate 2 In the clutch disengaged state, the pressure plate 2 is always retracted to a predetermined position as shown by the elastic repulsion of the coil springs 25 and 27 and the straps 20 and 31. In addition, a backward force is applied to the intermediate plate 5 from the coil spring 27 and the strap 31 and a forward force is applied from the coil spring 25 to a position where both forces are equal, that is, It is held at a predetermined position that does not press against any of the facings 6 and 7.
• the position of the intermediate plate 5 is preferably the width between the flywheel 1 and the pressure plate 2 on a platform using facings 6 and 7 of the same thickness.
• the positions of the pressure plate 2 and the intermediate plate 5 in the clutch disengaged state are always constant because they are determined by the elasticity of the coil springs 25 and 27 and the straps 20 and 31. It does not change even if 6, 7 is worn.
• the pressure plate 2 in the clutch disengagement operation, the pressure plate 2 is retracted by a predetermined distance due to the elasticity of the coil springs 25, 27, the strap 20, and the strap 31, and the intermediate plate 5 is moved to the predetermined position. It is retracted by a distance less than the distance (preferably half). Therefore, in the clutch disengaged state, facings 6 and 7 do not contact any of flywheel 1, pressure plate 2 or intermediate plate 5. No.
• the forward and backward movements of the intermediate plate 5 and the pressure plate 2 are controlled by using springs. Can be returned to the maximum, thereby preventing cutting defects.
• the connection start timings of both the fusings 6 and 7 are made substantially equal, thereby making the wear amount of both the fusings 6 and 7 uniform and improving the durability of the entire fusing. it can.
• pins having a frictional anchor structure as described in the above-mentioned publication are not used, it is not necessary to remarkably increase the dimensional accuracy of each part, and therefore, the manufacturing cost can be reduced.
• the coil spring 27 can be eliminated, and even in such a case, by setting the elasticity characteristics of the strap 31 appropriately, the same operation and effect as those of the illustrated embodiment can be obtained. Can be.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mechanical Operated Clutches (AREA)

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Cited By (1)

Citations (1)

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• 1987
  • 1987-12-28 JP JP20133887U patent/JPH01104436U/ja active Pending
• 1988
  • 1988-12-09 WO PCT/JP1988/001250 patent/WO1989006326A1/ja active Application Filing

Patent Citations (1)

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