JPS5865346A - Power transmission mechanism for automobile - Google Patents

Abstract

PURPOSE:To smoothly increase transmitted torque, by interposing torsional spring mechanisms in two places of a transmission system, while constituting at least one set of the mechanisms in such a manner that a plural number of elastic members are arranged in series through a retainer. CONSTITUTION:A flange 13, supporting the first torsional spring mechanism 12, is integrally provided to a spline hub 11 of a main driving shaft 9, and a rubber element 12a, a constitutional member of the first torsional spring mechanism 12, is fitted through retainers 12b in both sides to window holes 14 formed in the flange 13. While a transfer plate 19 supports the second torsional spring mechanism 20, and the latter comprises rubber elements 20a and retainers 20b, arranged in series to the direction of rotation, and is arranged to a window hole 19c of the transfer plate 19. In this way, a change of torque in a crankshaft 1 is absorbed by rubber element 20a, and a rise-up of transmitted torque can be smoothed. Further the first torsional spring mechanism 12 performs similar action in torque transmission to the main driving shaft 9.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a power transmission mechanism for an automobile that transmits power from an internal combustion transverse crankshaft to a main drive shaft of a transmission.

Generally, the crankshaft of an automobile internal combustion engine is subjected to three layers of vibration: torsional vibration, bending vibration, and longitudinal vibration.

Among these vibrations, in order to particularly reduce torsional vibration 1III and obtain smooth rotation, a rigid flywheel has conventionally been fixed to the crankshaft. cannot be reduced to Therefore, for example, a torsion spring made of a regular coil spring or the like so as to form an elastic action tube in the torsion direction, such as a tone spring interposed between a clutch disc and a clutch hub.
It is placed in the transmission system from the crankshaft to the main drive shaft of the transmission with the aim of reducing torsion and force, but it is not possible to reduce torsional vibrations with just the damping of the compression coil spring. Wh cannot be reduced sufficiently.

Therefore, a swing mechanism corresponding to the normal torque range and a vA spring mechanism corresponding to the high torque range are arranged in parallel to each other. A clutch mechanism equipped with a coil spring has been proposed because it has low spring stiffness and can absorb vibrations with high responsiveness.

Here, we will change the spring stiffness by changing the number of jobs of the same spring stiffness, or we will change the spring stiffness by changing the number of springs with the same spring stiffness, or
Divide into two sets, one set with high spring rigidity t and the other set with low spring rigidity, and arrange them in parallel. While the torsion spring mechanism is acting, there is a relief s corresponding to the torsion angle, and vibration t in the normal torque range is generated in the part where the spring stiffness is low.
- K is used to absorb iron. Therefore, when the transmission torque increases at a constant Wt, the torsional spring mechanism of the coil acts, and then when the gate is crossed, the above-mentioned runaway disappears and the copper i!
Since the torsion spring mechanism loses its plow, the spring stiffness white layer indicating the torsion angle OwA relative to the torque becomes steep here due to the difference in spring stiffness. A gap due to one discontinuity occurs during the increase in torque.

The advantage is that since the torsion spring mechanisms are arranged in parallel, the space for installing the coil spring is not large.
Therefore, if the rotation angle is large, the torsion angle is not large relative to the torque, so the spring stiffness decreases.

Therefore, this invention has developed a power transmission mechanism [torsion springs are separated into low and high stiffness regions, and are arranged in multiple rows of low regions (m rows), and are connected to low and high castles and rvs in one row. In order to maintain a relatively large torsion angle while maintaining the spring rigidity required for torque transmission, we are trying to provide an automotive power transmission mechanism that can achieve a smooth increase in transmitted torque. However, it is O.

Hereinafter, a different explanation will be given based on an actual example of this invention tube illustrated. On the 11i1 surface of the crankshaft 1 of an internal combustion engine for an automobile, a flywheel 3 is fixed by bolts 2, as shown in a second WIJK view in the axial direction OII. Outside sIi of the above flywheel 3
The end IK is secured by bolts or other means such that the clutch cover 4 is
ji! The clutch cover 4Ka and the diamond 7 ram spring 5 are supported by spring set bolts 6. And the above diaphragm spring sF
The outer circumferential edge presses the protruding edge of the brake chambray 70, and the brake plate 7 presses the clutch disk 8 against the end surface of the dry wheel 3, releasing the clutch engagement.

The nine main drive shafts are coaxially supported with the crankshaft 1, and each has a spline shaft portion 10 at its end, and a spline hub 11 is fitted to the spline shaft portion 10. . The above spline hub 11
Ktjllll's torsion spring mechanism 12t-supporting flange 13 is integrally provided, and the flange 13 has a plurality of screws as shown in FIG. ' window holes 14 are formed. Then, #i the structure M of the torsion spring machine 11112 is inserted into the window hole 14.
Rubber pieces 12 &, which are L members, have retainers 1 on both sides! bt-
It is inserted through. There are also 14 m of sleeves at the junctions between the window holes 14, and between the slots, the 7
A stopper pin tSa provided along one end surface of the lunge 13 or provided on the tening plate 15 and the transfer plate 16 is located. In addition, the above 7 ranks are 130
A transformer 7 upplate 16 is arranged along the opposite 1m surface, and the transformer 7 upplate 16 and the connecting plates IS and K are provided with a window hole 111m and ISb for receiving the torsion spring mechanism 12t. There is. ,
In addition, the above transformer 7 apley) 16 (f) boss part K
F! .

Dog clutch teeth 17 are provided, and a transfer rate 19 provided on the end face of the dog clutch teeth 111Yr boss that engages with fLK supports the torsion spring mechanism 201 of l112. And both the above transformer 7 up plates 16
and 19 are arranged in series in the supporting rotation direction so as to be freely rotatable with respect to the spout-in-happe IIK via a ball bearing 21. ing. In addition, the 20 m of the rubber pieces are attached to the retainer 20 by centrifugal force.
In order to prevent the retainer 20bK from coming off from the rivet head, the retainer 20bK is provided with a convex portion of the rivet head, and a concave portion into which the rubber pieces 20aKti and n1 are inserted. jl! In this case, the retainers 20b at both ends are locked outside the jaws of the contact 519m formed on the transfer plate 19.

Ota. Middle retainer 20b Fi threaded arm part 20
c) The boss l520dK is continuous through.

Another l1llll19b is formed on the transfer plate 19 in the opposite direction to the impact portion 19m.

Retaining plates 22 and 23 are arranged on both sides of the transfer plate 19, and the clutch disk 8 is provided with a torque stopper that also serves as a rivet on the holding plates 22 and 23. 2
Fixed at 4 and 2S. Torque stopper 2 above
4 and 2s are opposed to each other with the respective Ij connections 19m and 19b of the transformer 7 plate 19 facing in one direction KIIIa.

Window holes 26 and 27 are provided in the retaining plates 22 and 23 for torsionally receiving the holes 26 and 27, respectively.

When the flywheel 3 is rotated K, the flywheel 3 is rotated as a unit.
Ru. Then, the protruding edge of the rusher plate 7 is suppressed by the diaphragm spring 5, and the tarlatch desk 8
In the dry state where is frictionally engaged with flywheel 3,! K IJ tening plate 2 as shown in R4 diagram.
2% 23 Torque stopper 2B (D) One side rotates in the direction that the am!R119mK of the transfer plate 19 is rotated, and
and 270. On the other hand, rotate the rtfe retainer 20b, which is placed in one place with Ol&, so as to press the retainer 20b.
and a retainer 20b disposed at the other end, suppressing the rubber piece 20m interposed therebetween. When this rubber piece 201 is compressed, the spring force increases, and for normal torque transmission*, this spring force and the pressing force of the chewing plates 22 and 23 are balanced and the rubber piece 20 m is in a good value. The compressive deformation is stopped and the torque of the crankshaft 7) is absorbed by the pressure of the rubber piece 20 above.

Since power is distributed in series in the rotational direction via the rubber piece 20it'i retainer 20blr, the twist n of the rubber piece 2a
The corners can be quite large. For this reason, the Tortotsuha value is 24
The retaining plates 22 and 23 are rotated 1J relative to the transfer plate 19 to a degree corresponding to the torque force until they collide with each other. The above transfer rate 19 and another transfer plate 16 and dog clutch structure (dog clutch teeth 17 and] 8
) are arranged in series with respect to the transmission system, so
A first torsion spring mechanism 12 also acts for torque transmission to the main drive shaft 9. That is, the torque applied to the transfer plate 16 is transferred to the retainer 12.
K presses the J-C rubber piece 12m through b and transmits force to the flange 13 through its deflection. During torque transmission, the rubber piece 12ati hardly receives the compression action pipe, but the relative rotation between the transfer plate 19 and the rubber plate 2123, which generates high torque such as sudden acceleration, stops, and from this point, the first Torsion spring mechanism 1
2 works and the torque change of crankshaft 1 II? It is absorbed by compressive deformation of 12 m of rubber pieces.

If the torque fluctuation occurs in a portion extending from the torsion spring mechanism 20 of the second torsion spring mechanism 12, the spring stiffness of the OII torsion spring mechanism 20 is made smaller than that of the first torsion spring mechanism 12, If the w420 torsion spring mechanism 20 is selected in consideration of the spring stiffness at the maximum load state 11 and the initial spring stiffness of the first torsion and spring machine 12, the benefits obtained by both the 411 torsion spring mechanisms 12 and 20 are The spring stiffness curve is smooth with no knots, and since they are arranged in series with each other and each has a sufficient twist angle, the effect is that the rise of the transmitted torque becomes gradual. It will be done.

Further, during engine braking, that is, when power is transmitted from the main drive shaft 9 to the crankshaft 1, KFi is transmitted along a path opposite to that in the upper drive state. That is, the torque applied to the flange 13 is transmitted to the retaining plate 15 and the transfer plate 16 through the ill's torsion mechanism 121, and is brought from the transfer plate 16 to the transformer 7 upplate 19 through the dog clutch mechanism. % is further transmitted to the retaining plates 22 and 23 via the torsion spring mechanism 2, O of the string 2. According to the gradual decrease of torque, 1111 torsion spring 4! l! 12, 20 torsion spring mechanism 20c) Because the torsion angle decreases with Jll.

In this case too, torque is transmitted along a smooth stiffness curve.

In this embodiment, Fi, each torsion spring mechanism 12 and 2
(Transfer play as an intermediate drive member that supports 0)
16 and 19 are used, and these are supported on the spline hub llK11 through the ball bearing 21t, so centering of each transfer plate is easy, and one fall 25 retains the clutch disk 8. Since it also has the function of fixing it to the plates 22 and 23, its parts can be omitted, resulting in a simplified tube structure.

As described in detail above, the present invention includes a torsion spring mechanism that exerts an elastic force in one torsional direction at at least two locations in the transmission system from the crankshaft of the internal combustion engine to the main drive shaft of the transmission, and At least one set of torsion spring mechanisms 7fi in the torque transmission direction KIlr and a plurality of elastic bodies [arranged in series via the retainer 1, so a relatively large torsion angle and a gradual change with respect to the rise of the tortor O can be achieved. The advantage is that the stiffness of the shaft can be made relatively small. Further, by arranging the torsion spring mechanisms in series with each other in the transmission system, there is an effect that a sufficient torsion angle can be obtained.

[Brief explanation of the drawing]

@let! ! 11ft) is a sectional view of line A in Fig. 2 (between the sliding tening plate located on the crankshaft side and the 7 langes), and is a sectional view showing the first tensioning mechanism. ) is a cross-sectional view of line B (between the crankshaft side and the transfer plate and 0) of FIG. 11 Second torsion spring mechanism 'im*
3 is a front view and a sectional view showing the transfer plate, and FIG. 4 is a schematic view showing the operation of the torsion spring mechanism of 1R2. 1... Crankshaft % 9... Main drive shaft 7) h 15... Retaining plate, 16... Transfer plate, 17, 1N old.・Dog clutch tooth% 12%2o
...Torsion mechanism. 19...transfer play), 22, 23.
...Retaining plate, 24.25, 15a
・Old stopper pin. Handle 1 Figure (B) (B line #R view) η 245- Helmet 2 Figure vJ3 Figure vJ4 Figure procedure amendment (method) % formula % 1 Indication of incident 1982 Patent Application No. 164733 2 Title of invention Automobile Power transmission mechanism for use 3 Relationship with the case of the person making the amendment Patent applicant address No. 8 Homare, 5-33, Shiba, Minato-ku, Tokyo 6 Number of inventions increased by the amendment 7 Subject of the amendment

Claims (1)

[Scope of Claims] (1) A torsion spring imitation system that exerts an elastic action in one torsional direction at at least 12 locations in the transmission system from the crankshaft of the internal combustion engine to the main drive shaft of the transmission. 1. A power transmission mechanism for an automobile, characterized in that the at least one set of torsion spring mechanisms are arranged in one row via several elastic body retainers in the torque transmission direction. (Rose) In what is stated in Claim S, Paragraph 1. An automobile power transmission mechanism in which the series-arranged elastic bodies are made of rubber. The retaining plate is a torque stopper that prevents rotation relative to the retaining plate. The mounting for attaching the disc pad to the rivet also serves as a rivet.
Power transmission mechanism for automobiles. (4) In what is stated in claim 1,
The torsion gene mechanism that acts elastically in the torsional direction is arranged in series in the transmission system, and is connected via a clutch mechanism and is installed on the n7+s material in an automobile power transmission system. (5) Claim 1 or! F! The force transmission mechanism for an automobile according to item 4, wherein intermediate drive members supporting each torsion spring mechanism are mutually supported via ball bearings.