JPH02570B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to dry clutches.

A dry clutch is normally installed exposed outside the engine, and its conventional structure is shown in FIG.

The dry clutch A shown in FIG. 2' to the main shaft 2'.

Reference numeral 10' denotes a reduction follower gear rotatably fitted to the main shaft 2', and is configured to rotate while meshing with a reduction main gear 12' provided on the crankshaft 1'.

The housing 3' of the clutch A' is fitted and held in the boss portion 11' of the reduction driven gear 10' so as to rotate together with the gear 10'. It is spline fitted to the outer periphery of the portion 11'.

Therefore, the fitting part 3c' in the housing 3' performs two functions: transmitting rotation from the reduction follower gear 10' and holding the housing 3' together with the gear 10' on the main shaft 2'. Considering the function of holding the housing 3' of the user, it is preferable that the fitting length of the fitting portion 3c' is long.

That is, if the fitting length of the fitting portion 3c' is short, there is a risk that the housing 3' will wobble and malfunction of the clutch A'.

However, since the fitting part 3c' is fitted to the outer periphery of the boss part 11' of the reduction gear 10', in order to increase the fitting length, the fitting part 3c' is placed closer to the reduction gear 10' side, that is, to the crankcase. Even if an attempt is made to extend the cover b' inward, the portion between the boss portion 11' and the outer periphery of the gear 10' becomes an obstacle and cannot be extended any further.

On the other hand, it is also possible to extend the fitting part 3c' together with the boss part 11' of the reduction follower gear 10' to the outside of the crankcase cover b', but in this case, the fitting part 3c' and the boss part 11' As the clutch A' is extended, the entire clutch A' protrudes beyond the outside of the crankcase cover B', that is, the outside of the engine.

However, when the amount of protrusion of clutch A' from the engine increases, the width of the engine increases, and especially when clutch A' is installed in a motorcycle engine and protrudes to the side, the width of the engine increases. A problem arises in that the bank angle becomes small.

Therefore, conventionally, the clutch A' is disposed as close to the reduction driven gear 10' as possible, and it is not possible to employ means to increase the amount of protrusion of the clutch A' from the engine as described above.

As described above, it has been difficult to ensure a long fitting length between the housing 3' of the clutch A' and the reduction driven gear 10', that is, the fitting length with the main shaft 2'.

The present invention has been made in view of the above circumstances, and its object is to spline-fit a housing to the inner periphery of a boss portion of a reduction follower gear, and to fit the fitting portion over almost the entire length of the boss portion. By extending the crankcase cover inward to fit, it ensures a long length of engagement with the main shaft of the housing, holds the housing stably without wobbling, and prevents malfunction of the clutch. be.

An example of the embodiment of the present invention will be explained with reference to the drawings. In the drawing, A is a dry clutch, a is a crankcase, b is a crankcase cover that covers the crankcase a from the outside, 1 is a crankshaft, and 2 is adjacent to the crankshaft 1. This is the main axis provided as a.

The clutch A is disposed on the outside of the crankcase cover b, and is interposed between the crankshaft 1 and the main shaft 2 so as to intermittent transmission of rotation from the crankshaft 1 to the main shaft 2.

3 is a housing of the clutch A, and 4 is a boss that fits loosely into the housing 3.

The housing 3 is divided into a base portion 3a and an outer circumferential portion 3b, which are elastically connected via an elastic member 5 made of a rubber material or the like, so that when an impact is applied to the housing 3, the impact can be absorbed. It's becoming like that.

On the other hand, the boss 4 is divided into two inner and outer members 4a and 4b, and the inner member 4a is spline-fitted to the main shaft 2 so as to rotate together with the shaft 2.

The inner member 4a and the outer member 4b are elastically connected by sandwiching an elastic member 8 made of rubber or the like between protrusions 6 and 7 that protrude alternately from their mating surfaces. 4 is designed to be able to absorb the impact when it is applied.

9 is the outer member 4b of the boss 4 and the housing 3
This is a clutch plate provided between the housing 3 and the outer circumferential portion 3b of the housing 3, and rotation transmission between the housing 3 and the boss 4 is interrupted and interrupted via the clutch plate 9.

The clutch A is held by having its housing 3 fitted into the boss portion 11 of the reduction driven gear 10 provided on the main shaft 2.
The fitting portion 3c is formed by extending the base portion 3a of the housing 3 toward the reduction follower gear 10 in a cylindrical shape.

On the other hand, a reduction follower gear 10 fitted into the housing 3 is rotatably fitted onto the outer periphery of the main shaft 2, and rotates while meshing with a reduction main gear 12 provided on the crankshaft 1.

Reference numerals 13 and 14 are side plates provided to sandwich the reduction gear 10 from both the inside and outside sides thereof.

These side plates 13 and 14 are connected to the reduction gear 10 via a pin 15 so as to freely rotate, and are elastically connected to the reduction gear 10 via a spring 16 at a portion other than the connection portion by the pin 15. When an impact is applied to the gear 10, the impact can be absorbed by the spring 16.

Further, the outer side plate 14 has its base 14a fitted into the outer periphery of the base 10a of the reduction driven gear 10 and projects toward the housing 3 side of the clutch A.
The boss portion 11 of the gear 10 is constituted by a.

Thus, the fitting part 3c of the housing 3 of the clutch A is spline-fitted to the inner periphery of the boss part 11 of the reduction gear 10, but the spline-fitting part is the outer side plate of the boss part 11. This is the inner periphery of the base 14a of No. 14.

The fitting portion 3c of the housing 3 is further extended inward from the spline-fitted portion as described above, and enters the inner periphery of the base 10a of the reduction follower gear 10, and the bearing 17 is attached to the outer periphery of the main shaft 2. and is rotatably fitted via a boss portion 18a of a gear 18, which will be described later.

Therefore, the fitting portion 3c of the housing 3 fits over substantially the entire length of the boss portion 11 of the reduction follower gear 10, ensuring a long fitting length with the main shaft 2.

On the other hand, the gear 18 having a boss portion 18a into which the fitting portion 3c of the housing 3 is fitted is for driving auxiliary equipment, and is located inside the crankcase cover b from the reduction follower gear 10 to drive the main shaft. The base portion 10a of the reduction driven gear 10 is fitted and held at the base end of the outer periphery of the boss portion 18a, and rotates together with the gear 10.

Incidentally, the power transmission between the main reduction gear 12 and the follower reduction gear 10 may be performed via an intermediate gear (not shown) supported by an intermediate shaft, and in this case, the intermediate gear is A gear with the same number of teeth as the main reduction gear 12 may be used, or a gear with a larger number of teeth may be used for intermediate reduction.

Since the present invention is configured as described above, the housing base of the clutch is spline-fitted to the inner periphery of the boss portion of the reduction follower gear, and the crankcase cover is fitted so that the fitting portion extends over almost the entire length of the boss portion. Since it is extended inward and rotatably supported on the outer periphery of the main shaft, it is possible to ensure a long length of engagement between the housing and the main shaft, and to hold the housing stably without rattling. malfunction can be prevented.

Thus, the intended purpose can be achieved.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a clutch of the present invention, and FIG. 2 is a sectional view showing a conventional clutch. In the diagram, A, A'...Dry clutch, a, a'...
Crankcase, b, b'...Crankcase cover, 1,1'...Crankshaft, 2,2'...Main shaft, 3,3'...Housing, 3c, 3c'...Fitting part of housing , 10, 10'...reduction follower gear,
12, 12'...Reduction main gear, 11, 11'...Boss portion of reduction gear follower.

Claims (1)

[Claims] 1 For the boss portion of the reduction gear of the main shaft, which is provided at the end of the main shaft parallel to the crankshaft and protrudes outward from the crankcase cover, and which receives power transmission from the reduction main gear of the crankshaft. In the dry clutch in which the base of the housing is fitted and held so as to rotate together with the reduction follower gear, the base of the housing is spline-fitted to the inner periphery of the boss of the reduction follower gear on the main shaft, and the fitting portion is A dry clutch extends inward of the crankcase cover so as to fit over almost the entire length of the boss portion, and is rotatably supported around the outer periphery of the main shaft.