JPS5865345A - Power transmission mechanism for automobile - Google Patents

Abstract

PURPOSE:To gently increase transmission torque, by interposing a specific torsional spring mechanism between a driving side member and driven side member in a flywheel. CONSTITUTION:A torsional spring mechanism 5, interposed between a main unit 2, used as a driving side member, and a transfer plate 3, used as a driven side member, of a flywheel 1, is constituted in such a manner that plural sets, for instance, two sets of center plates 6 and side plates 13 are symmetrically prepared for the rotary center and fixed to the plate 3 and the main unit 2, then a rubber made elastic material 9 is interposed through a retainer 8 to be arranged in series to the direction of rotation for the center plate 6 and the side plate 13. In this way, turning motion of the main unit 2 causes relative action between the plates 6, 13 to turn the retainer 8 and press the elastic material 9, and its compressive deformation can absorb a change of torque in a side of the main unit 2, further a torsional angle can be also taken to a large degree, thus torque transmission can be gently performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a modification of an automobile power transmission mechanism in which power is transmitted from the crankshaft of an internal heat engine to a transmission via a flywheel and a clutch.

Generally, the crankshaft of an internal heat engine for an automobile is subjected to three types of vibration: torsional vibration, bending vibration, and longitudinal vibration. Conventionally, a rigid flywheel has been fixed to the crankshaft in order to particularly reduce torsional vibration and obtain a smooth turn. cannot be reduced. Therefore, the flywheel is divided into two parts, and a plurality of torsion spring mechanisms such as compression coil springs are arranged in parallel so as to exert an elastic action in the torsional direction between the two parts, thereby reducing the vibration of the screw 11. [Needle was proposed. In this case, it is desirable to prevent the transmission torque from rising too steeply.

For this purpose, use springs with as low stiffness as possible,
Friend, it is necessary to have a large torsion angle, but there is a limit to the reduction in spring stiffness that can be used, and there was a design constraint that the torsion angle could not be made sufficiently large.

In this invention, a swinging spring mechanism configured to be able to maintain a relatively large torsion angle while maintaining the spring rigidity required for torque transmission is arranged between two divided flywheel OII members, This is a power transmission mechanism for an automobile that can achieve a smooth and gradual increase in transmitted torque O''t'' by t4.

Hereinafter, a detailed explanation will be given based on the implementation flJK shown in the diagram. In the figure, flywheel 1#i, body g
Flywheel body 2 as EMS material and transfer plate 3 as driven lIs material - IIIIIIE
The wheel body 2 is fixed in the direction of the crankshaft 4 through bolts 41. A torsion spring mechanism 5 relating to zero division is interposed between the flywheel main body 2 and the transfer plate 3. The upper torsion spring mechanism sFi is provided with a number set, for example, two sets, symmetrically with respect to the center of rotation,
1'llDsen! The plate 6 is provided with a window hole 7 formed in the shape of an arc, and a rubber elastic body 9 is inserted through a retainer 8r so that the window hole 7 is arranged in series with respect to the -turning direction. It becomes *a with . It has an 01J retainer 81 line at both ends and is provided with an arm 8a' extending to the center of rotation of each retainer 8#i, -tft(
The boss 1lIK of the space plate 3 is connected to a rotatably fitted pop-out prevention member 10. The center plate 6 has an arc-shaped slit 11 formed along the upper porthole 7. The stopper pin 12 extending from the flywheel body 2 is inserted through this.

Each retainer 8011 is on both sides of the center plate 60!
[[There is a side plate 13.13 having an arc-shaped eave N15c holding the n and a window hole 134 for inserting the retainer 8 and the elastic body 9t. )13.Clutch part 13 of 13
1% 18m is connected and fixed to the flywheel main body 2 by the stopper bin 12 via the collar 14t. Also, the center plate 6 is as follows.

to the transfer plate 3 by bolts 15;
It is connected and fixed together with the clutch cover 16. A disk 16a of the clutch 16 is pressed against the end Wi of the transfer plate 3. The above rubber elastic body 9Fi is cylindrical and has both ends il! retainer 8
A recess III for engaging the convex part is drilled, and a large damping force can be obtained against the metal spring.Also, if the gold SU spring was not formed in a coil shape, it would not be able to be compressed. On the other hand, since rubber itself has elasticity, the shape can be freely selected.A pool bearing is provided for the flywheel 1 in order to hold it concentrically with respect to the shaft. . In addition, there are 8 retainers with potential on both g#, center plate 6 and side plate 13 in the circumferential direction.
and the elastic body 9, and the direction in which the centrifugal force acts is held by the eaves II 13e of the side plate 13 and the protrusion 6a of the center plate 6, so that it does not protrude like other retainers 8... There is no need to hold it at the center of rotation via the prevention member 10. However, since the retainer 8 presses the center play) 6Klllr and moves (b), it comes into contact with the eaves of the side grate m 13 c, so this [
The window hole 13d of the side plate 13 is
In contrast, the center plate 60 has nine large window holes 7, and if there is no relative movement between the center plate 6 and the side plate 13, there is no relative movement between the O-retainer 8 at both ends and the center plate 6. and n et al. Great 6
．． 1B and when the center plate 6 presses the retainer 8t7 and rotates, the above-mentioned gap disappears and the top of the retainer 8 touches the protrusion of the center plate 6 by the amount of the gap! ! 6" and descends, and the Kl!
I'm trying to create a gap.

However, if the crankshaft 4K) torque is transmitted incorrectly, 1! , the flywheel main body 2 is rotated in the direction of arrow A in Fig. 1. When transmitting torque from the flywheel main body 2 to the transfer plate 3, tLS
As shown in the figure, center plate 6 and side play) 1
3. A relative movement occurs between the player and the player (side play) 13
．． One of the 13 stopper bins 12 is moved in a direction in which it comes into contact with one end of the sleeve 11 of the center plate 6,
Side play) 13.1312) Turn the trap to push the f'L7t retainer 8 arranged in one direction at one edge of the window hole 7, II! It is arranged in a rigid manner (supported by Team 8 (Interpretation) 6), and suppresses the physical abuse of enemy bullets intervening at the threshold. When this bullet column 9 #i is compressed, the spring force increases, and the normal torque transmission 1
1 has this spring force and the side plate 13.131
! The compressive deformation of the elastic body 9 stops at a position where the pressing force D is balanced. Torque fluctuations in the flywheel main body 2111 are absorbed by the compressive deformation of the elastic body 9.

Since the above-mentioned nine elastic bodies are arranged in series, when the spring stiffness of one elastic body 9 is 1, the total spring stiffness is Fi1/n for the number n of elastic bodies arranged in one row. Additionally, unlike the conventional parallel arrangement, the torsion angle appears to be sufficiently large, so torque transmission is performed with gradual changes. The torque transmitted to the center plate 6 is then transmitted to the main drive shaft 17 via the transfer plate 3, the disk 16a, etc.

At this point, when high torque such as sudden acceleration is transmitted from the flywheel body 1 to the side plate 13.13, the compression of the elastic body 9 progresses, causing stress and the rim 1.
Contact with the end surface of 1 (vertical shape, side plate 13%)
The relative rotation between the center plate 13 and the center plate 121 is stopped, and the driving force is transferred to the center plate via the stopper bin 121.
6Ki [directly transmitted.

In addition, the engine brake W# trap, the transfer plate 3, also transmits the flywheel body 2#+[) torque, and at this time, the torsion spring mechanism s#i is also subjected to a compression action. Become.

As described above in detail in this invention 11, in an apparatus for transmitting torque from a crankshaft of an internal heating engine to a main drive shaft of a transmission via a flywheel, the flywheel is connected to a drive hook member and a drive member. 1
The driven member is divided into (b) driven @ members that are visible in the opposite direction, and is arranged in series through a plurality of compression type bullet body retainers in the torque direction. It is necessary for torque transmission because it is interposed between the drive member and the driven member.

By ensuring a relatively large torsion angle tube while maintaining the spring stiffness, it is possible to achieve a smooth and gentle increase in the transmission torque using tAl, which has the effect of attenuating or coupling torsional vibration.

[Brief explanation of the drawing]

Figure 1 shows a cross section of one embodiment of the present invention.
! ! , 11n2rlA/d, Oka longitudinal aS view, 3rd mu
, and as! which shows the operating state of the power transmission machine of the ca invention! This is a clear diagram. 1... flywheel, 2... river/drive side member, 3... driven fllWJ material, 4... crankshaft, 5... torsion spring mechanism , 6...
... Center plate, 7. Old window hole, 8.
...Retainer, '9...Elastic body, 12...River...
Stopper pin, 13...Side plate. Samurai Applicant Hideaki Sato, Patent Attorney, Mitsubishi Motors Corporation

Claims (1)

[Scope of Claims] (1) In a device in which torque is transmitted from an internal heat engine O crankshaft to a main drive shaft of a transmission via seven wheels, the flywheel is connected to a drive side member and the drive side member. A torsion spring mechanism in which a plurality of compressed elastic bodies are arranged in series via a retainer in the torque transmission direction is connected to the driven side and the driven side. A power transmission mechanism for an automobile characterized by intervening between a member and an O-separator. (3) In statement 040 of Claims Collection, Paragraph 1,
A power transmission mechanism for an automobile in which the compression type elastic body is composed of rubber. (2) Patent rust request O range! Summary Section 1 or Section 1 to 2 O
%, the torsion spring mechanisms having the compression type elastic body are arranged in plural sets symmetrically with respect to the center of rotation of the flywheel O1, and each torsion spring mechanism OIJ retainer has a centrifugal force applied to the elastic body. An automobile power transmission mechanism supported by a pop-out stop that can be automatically moved in the direction of rotation so as to be supported against force.