JPH0239076Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is capable of variable speed in any direction, for example, forward or backward. an elastic ring that is fitted and fixed on the outer peripheral surface of the disk from one side, and a cover that comes into contact with the side surface of the elastic ring to prevent the elastic ring from being pulled out laterally. This invention relates to the disk structure of a type transmission device.

[Conventional technology]

In the disk structure of this type of disk-type transmission, conventionally, the sixth ring was used to form the elastic ring.
As shown in the figure, engagement pins 25 that protrude laterally outward are formed at a plurality of locations in the circumferential direction on the side surface of the elastic ring 21, and when the engagement pins 25 are assembled, the engagement pins 25 are attached to the disk body 23. The elastic ring 21 was configured to rotate together with the disk body 23 by fitting into the engagement hole 23B provided on the outer peripheral surface.

[Problem that the invention attempts to solve]

When using the above configuration, you can either use a mold to mold the elastic ring to produce one item, or use a multi-cavity mold to simultaneously produce at most multiple items. However, there was still room for improvement in terms of production.

The purpose of this invention is to improve productivity and improve the attachment of the elastic ring to the disk body by simply changing the fitting part between the disk body and the elastic ring. It is in.

[Means for solving problems]

The characteristic configuration according to the present invention is that, among the engaging uneven portions provided at the fitting portion between the outer circumferential surface of the disk body and the inner circumferential surface of the elastic ring, the axial engagement length of the convex portion is determined by the engagement length of the convex portion. The point is that it is set to be shorter than the combined length, and its effects are as follows.

[Effect]

In other words, since the fitting portion of the elastic ring with the disk body is formed on the inner circumferential surface, the third
As shown in the figure, in order to perform a molding process in which a prototype product 22 corresponding to a plurality of elastic rings 21 is made, a product of the usable width is cut out from the original product, and a finishing process is applied to the cut product, the above-mentioned process is performed. If the molding length of the original product 22 is made sufficiently long each time, more products can be produced from one original product than in conventional molding processes that use multiple molds. It's a monkey.

[Effect of idea]

As a result, although finishing work is required after cutting out the original product, by using the original product in the middle of the process, it has become possible to improve the efficiency of the entire process. In addition, since the convex portion of both engagement concave portions is formed so that the convex portion is shorter, when the elastic ring is tightened with the cover, the elastic ring is Since the shrinkage can be alleviated, even if the elastic ring is slightly larger in the relative width of the fitting part between the disk body and the elastic link, there will be no problem of insufficient tightening with the cover, and the elasticity during operation will be reduced. Since the expansion and contraction caused by heat generation of the ring can be absorbed by the space, the stable attachment state of the elastic ring can be maintained.

〔Example〕

FIG. 5 is a side view showing the entire walk-behind lawn mower, which includes a vertical engine 1, a bevel gear 4 that drives a cutting blade 3 in a housing 16 via a cutter clutch 2, a universal joint 5, A rear wheel 12 is configured to be driven via a shaft transmission mechanism 8 consisting of a telescopic spline shaft 7, a disc-type continuously variable transmission 9, a V-belt 10 as a transmission device, and a differential device 11. There is.

The cutter clutch 2 and the continuously variable transmission 9 are configured to be operated by a cutter clutch operating lever 14 and a speed change operating lever 15 provided on a steering handle 13, respectively.

In addition, the housing 1
Exhaust duct 17 provided on one side of the upper part of 6
A grass collection container 18 is detachably provided for collecting the cut grass discharged through the container.

The continuously variable transmission 9 is disposed in a high position space A on the side of the discharge duct 17, and as shown in FIGS. 4 and 5, the driven disk 9B is disposed relative to the drive disk 9A. is frictionally transmitted, and the driven disk 9B is connected to the driving disk 9A.
By locating it radially inward, low-speed transmission is performed, and by locating it radially outward, high-speed transmission is performed. It is configured so that it can be switched between forward and reverse by moving it to the left, that is, it is also possible to switch between forward and backward.

The driving disk 9A is always pressed against the driven disk 9B by a spring 19, and is configured to be separated from the driven disk 9B against the biasing force of the spring 19, thereby cutting off the power transmission.
It is configured to be turned on and off by operating a traveling clutch lever 20 provided at 3.

Next, the structure of the passive disk 9B will be explained in detail. As shown in FIG. 3, an unfinished original product 22 of the elastic ring 21 is formed into a pipe shape, and a keyway-shaped engagement recess 21 is formed on the inner peripheral surface of the original product 22.
A is provided. The elastic ring 21 is the original product 2
After cutting out, the outer peripheral surface is finished (chamfered). On the other hand, a fitting part B for the elastic ring 21 provided on the outer circumferential surface of the disk body 23 to which the elastic ring 21 is attached has a protrusion 23A that is fitted into the engagement recess 21A of the elastic ring 21 and has a length in the axial direction. It is provided in a shortened state. Therefore, as shown in FIG. 2, the elastic ring 21 is fitted into the fitting portion B of the disk body 23 from the lateral side, and is prevented from being pulled out laterally by the cover 24 that comes into contact with the lateral side. has been done.

[Another example]

B. The objects to be formed with the engaging uneven portions 21A and 23A may be exchanged.

○B The above configuration may be applied to other agricultural vehicles and general vehicles.

[Brief explanation of the drawing]

The drawings show an embodiment of the disk structure of the disk type transmission device according to the present invention, FIG. 1 is a longitudinal sectional view of the elastic ring, FIG. 2 is a longitudinal sectional side view of the passive disk,
FIG. 3 is a perspective view showing the cutout state of the elastic ring;
FIG. 4 is a side view of a disc-type transmission device, FIG. 5 is a side view of a walk-behind lawn mower, and FIG. 6 is a longitudinal sectional side view of a conventional passive disc. 9B... Disc, 21... Elastic ring, 23
... Disk body, 21A ... Recess, 23A ...
Convex portion, 24...Cover, B...Fitting portion.

Claims (1)

[Scope of utility model registration request] One disk 9B is attached to a disk body 23, an elastic ring 21 that is fitted and fixed to the outer peripheral surface of the disk body 23 from one side, and an elastic ring 21 that prevents the elastic ring 21 from being pulled out laterally. In the disk structure of the disk type transmission device, the cover 24 is provided in a fitting portion B between the outer peripheral surface of the disk body 23 and the inner peripheral surface of the elastic ring 21, respectively. Among the engagement uneven parts 21A and 23A, the protrusion 2
A disc structure of a disc type transmission device in which the axial engagement length of 3A is set to be shorter than the engagement length of recess 21A.