JPS6337529Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a clutch device that is installed between an engine and a transmission and transmits and interrupts power.In particular, the present invention relates to a clutch device that is installed between an engine and a transmission and transmits and interrupts power. The present invention relates to a clutch device equipped with a buffer mechanism that alleviates fluctuations.

In such a conventional clutch device, a driven gear that meshes with a driving gear connected to an engine is attached to one side of the clutch outer by a side plate disposed on the side opposite to the clutch outer of the driven gear, and a damper spring provided on this driven gear is attached to one side of the clutch outer. The damper spring is placed between the window of the side plate and the recess of the clutch outer, and a cut-and-raised stopper is formed on the inner periphery of the window of the side plate to prevent the damper spring from falling off. A transmission spring is inserted to urge the driven gear toward the side plate to prevent vibration, and the clutch outer and the clutch inner connected to the transmission are detachably connected via a clutch plate.

In such devices, the damper spring is disposed circumferentially around the driven gear, but its operating capacity is determined by the radial distance from the center, so in order to secure a predetermined capacity, the damper spring must be moved from the center. If the distance in the radial direction is short, the spring load cannot be increased or there is not enough play, so it is necessary to make the distance in the radial direction long.

By the way, if the diameter of the driven gear is made small, the damper spring must be moved radially inward due to problems such as the strength of the side plate that receives the thrust load, and it is difficult to ensure the predetermined operating capacity of the damper spring. becomes difficult. Further, it is necessary to form a retaining portion in the window portion of the side plate to prevent the damper spring from falling off, and a friction spring for vibration isolation is also required.

The present invention was devised in view of these points, and its purpose is to reduce the diameter of the driven gear, improve the capacity of the damper spring, and process the inner periphery of the window of the side plate. To provide a clutch device which simplifies the process and reduces the number of parts of a vibration isolating spring.

In order to achieve the above object, the present invention provides that in the clutch device, the edge of the side plate is overlapped with the base of the gear portion of the driven gear with a predetermined gap, and the retaining portion of the damper spring and the The present invention is characterized in that a cover plate having a spring portion that biases the driven gear toward the clutch outer side is attached to the side plate on the side opposite to the driven gear, and a damper spring is disposed close to the gear portion of the driven gear.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

A drive gear 2 is provided on the crankshaft 1 of the engine A, and the drive gear 2 meshes with a driven gear 3 to reduce speed and transmit power to the clutch device B. And the clutch outer 4 of the clutch device B
can be connected and disconnected via a clutch inner 5 connected to the transmission C and a clutch plate 6.

The clutch outer 4 of this clutch device B has a cylindrical shape with one end open and the other end a closed side wall 4a. A side plate 8 is placed on the side of the driven gear 3 opposite to the clutch outer 4, and a cover plate 9 is placed on the side of the side plate 8 opposite to the driven gear. 4 together with a side plate 8 and a cover plate 9.

Further, the disk portion 3a of the driven gear 3 is the gear portion 3.
The disk portion 3a is formed with a substantially rectangular window portion 12 extending in the circumferential direction, and the same number of recesses 13 are provided at the same positions as these window portions 12 to close the clutch outer 4. Side wall 4a
The side plate 8 is provided with the same number of windows 14 on one side thereof and at the same position. A coiled damper spring 15 is installed in the windows 12, 14 and the recess 13 that communicate with each other.
They are housed with their axes facing the circumferential direction of the driven gear 3.

The diameter of the driven gear 3 is formed to be small so as to be close to the diameter of the clutch outer 4, and the distance between the gear portion 3b and the window portion 12 is also set to be small. A notch peripheral edge 16a is formed at the outer peripheral end 16 of the closed side wall 4a of the clutch outer 4 facing the gear part 3b, and the notch peripheral edge 16a faces the base of the gear part 3b at a predetermined interval with a tooth width _l1 . are superimposed on each other.

Further, the diameter of the side plate 8 is the same as that of the clutch outer 4.
The outer periphery is formed to have approximately the same diameter as the gear part 3.
The edge portion 8a is bent to match the base portion of the gear portion 3b, and the edge portion 8a is overlapped with the tooth width _l2 of the gear portion 3b with a predetermined gap S therebetween. Although this side plate 8 receives a thrust load during operation, sufficient strength is ensured by the overlapping edges 8a. Further, since the damper spring 15 can be disposed close to the gear portion 3b of the driven gear 3, it can be disposed at a position away from the center of the driven gear 3, and the operating capacity is improved.

The cover plate 9 has a damper spring 15 on its outer periphery.
A curved retaining portion 9a is formed at a position corresponding to the damper spring 15, and is disposed to cover the damper spring 15, thereby preventing the damper spring from falling off. Therefore, there is no need to process a stopper part for preventing the damper spring 15 from falling off on the inner peripheral edge of the window part 14 of the side plate 8, and the side plate 8 can receive only the thrust load. Further, a U-shaped spring portion 9b is bent on the inner periphery of the cover plate 9, and the spring portion 9b biases the driven gear 3 toward the closed side wall 4a of the clutch outer 4 to prevent vibration. Although a predetermined gap S is set between the side plate 8 and the gear portion 3b of the driven gear 3, the action of the spring portion 9b is performed within a flat surface inside the damper spring 15 of the driven gear 3. Since it is closed, the edge 8a and the notch peripheral edge 16a
It is not necessary to increase the machining accuracy of the overlapping portion between the gear portion 3b and the gear portion 3b.

The drive gear 2 provided on the crankshaft 1 of the engine A has a larger diameter due to the smaller diameter of the driven gear 3, and the clutch outer 4 of the clutch device B is connected to the starter gear 17 of the crankshaft 1. are located close together.

That is, if high-speed torque is transmitted to clutch device B without changing the clutch capacity due to the increased horsepower of engine A, the clutch will slip due to insufficient friction and will not be able to transmit sufficient torque. Therefore, it is necessary to increase the capacity of the clutch device B, but if the clutch diameter is increased, the starter gear 17 is included and the clutch cannot be moved closer to the crankshaft 1 direction. The portion of the case 18 that accommodates B protrudes outward, which is inconvenient in terms of the compactness of the engine.

Therefore, as mentioned above, by making the drive gear 2 large in diameter and the driven gear 3 small in diameter, the rotational torque can be reduced, and since there is no need to enlarge the clutch device B, the engine can be made smaller.
In addition, a retaining portion 9a for preventing the damper spring from falling off is formed on the cover plate, and a spring portion 9a is formed on the cover plate to prevent the damper spring from falling off.
Since b is formed, the processing of the inner peripheral edge of the window portion of the side plate can be simplified and the vibration-proofing spring member can be omitted.

Next, the embodiment shown in FIG. 3 will be explained.
The driven gear 3 is overlapped so as to be relatively rotatable, and the disc portion 3
It is composed of first and second gears 31 and 32 in which the gear parts 1a and 32a are formed thinner than the gear parts 31b and 32b. The first gear 31 and the second gear 32 have circumferential overlapping surfaces 31c and 32c on opposite surfaces of the window portion 1.
2a, 12b, both gears 31,
The contact area between 32 is reduced to facilitate relative rotation between the two.

Both gears 31 and 32 are connected to disk portions 31a and 3
Long holes 41 and 42 extending in the circumferential direction formed in 2a
is inserted into the boss 7 and fixed, and the damper spring 15 exerts an elastic force on both the gears 31 and 32 to shift the phase of their teeth, thereby causing the meshing portion of the driving and driven gears 2 and 3 to The teeth of the first and second gears 31 and 32 sandwich the teeth of the drive gear 2 to eliminate backlash.

The gear portion 32b of the second gear 32 faces the notch peripheral portion 16a formed in the closed side wall 4a of the clutch outer 4, and is overlapped with a predetermined gap at the tooth width _l1 . On the other hand, the side plate 8 has its outer periphery connected to the first gear 3.
It is bent to match the gear part 31b of No. 1, and the tooth width l ₂
Edges 8a are continuously formed to overlap with each other with a predetermined gap between them.

The cover plate 9 is fixed by rivets 10, and a bent portion 9a on its outer circumference prevents the damper spring 15 from falling off, while a spring portion 9b formed by folding back into a U-shape on the inner circumference prevents the first gear 31 from falling off. The clutch outer is biased in four directions. In this way, the cover plate 9 has the functions of preventing the damper spring 15 from coming off and urging the first gear 31.

As described above, according to the present invention, the edge of the side plate is overlapped with the base of the gear portion of the driven gear with a predetermined gap, and the spring that biases the retaining portion of the damper spring and the driven gear toward the clutch outer side is provided. Attach a cover plate with a section to the side plate opposite to the driven gear,
Since the damper spring is placed close to the gear part of the driven gear, the damper spring is placed radially away from the center of the driven gear, which increases the capacity of the damper spring and reduces the diameter of the driven gear, making it easier for the engine. Even if the horsepower of the engine is increased, the rotational torque transmitted to the clutch device becomes smaller, so there is no need to make the clutch device larger, and the engine can be made more compact.In addition, a stopper part is installed in the window on the side plate to prevent the damper spring from falling off. Although machining is required, the machining of the inner peripheral edge of the window can be simplified, and by forming the vibration-proofing spring part on the cover plate, the number of vibration-proofing spring parts can be reduced.

[Brief explanation of the drawing]

1 and 2 show one embodiment of the present invention, in which FIG. 1 is a sectional front view, FIG. 2 is a partially sectional side view of a clutch device, and FIG. 3 is another embodiment of the present invention. It is a cross-sectional front view showing an example. 2 is a driving gear, 3 is a driven gear, 4 is a clutch outer, 8 is a side plate, 8a is an edge, 9 is a cover plate, 9a is a retaining part, 9b is a spring part, 12 and 14 are windows, 13 is a recessed part , 15 is a damper spring, 1
6 is the outer peripheral end.

Claims (1)

[Scope of utility model registration request] A driven gear that meshes with a driving gear connected to the engine is attached to one side of the clutch outer by a side plate disposed on the side opposite to the clutch outer of the driven gear,
In the clutch device, the damper spring provided on the driven gear is disposed between the window of the side plate and the recess of the clutch outer, and the clutch outer and the clutch inner connected to the transmission are connectably and disconnectably connected via a clutch plate. The edge of the side plate is overlapped with the base of the gear portion of the driven gear, and a cover plate having a retaining portion of the damper spring and a spring portion that biases the driven gear toward the clutch outer side is placed on the opposite driven gear side of the side plate. A clutch device characterized in that the damper spring is mounted on the clutch and the damper spring is located close to the gear part of the driven gear.