JPH0133856Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a clutch structure in which a clutch body sliding on a shaft can smoothly slide.

BACKGROUND ART Conventionally, direction changes in simple self-propelled vehicles are often performed by appropriately intermittent power being applied to the left and right axles.

Although various clutch structures are incorporated as such a power intermittent mechanism, the most commonly adopted form is that the clutch body slides on the shaft and engages and disengages from a meshing protrusion formed on the drive side member to interrupt the power.

However, the width of the transmission is generally subject to various restrictions, and the clutch body must be slid over a very small span, and the width of the clutch body itself must be reduced accordingly. However, it is common knowledge that a normal slider cannot slide smoothly unless the width is at least a predetermined width relative to the diameter.

By applying special innovations to the clutch structure, this idea not only made it possible to secure a sufficient width of the clutch body even with a limited span, but also provided a clutch structure that was able to strengthen the strength of the main components. It is something.

Hereinafter, a specific embodiment of this invention will be described with reference to the drawings while comparing it with a conventional example.

Figure 1 is a partial cross-sectional view of the power system of a conventional forestry transport vehicle.
The speed is suitably reduced within the internal gear and transmitted to the drive wheel body 2, which is a central gear. The power transmitted to the drive wheel body 2 is further transmitted to the driven shafts 3, 3 connected to the left and right axles, which are fitted loosely inside the drive wheel body 2, and the configuration thereof is as follows. It's summery.

That is, the bushes 4, 4 are loosely fitted between the driving wheel body 2 and the driven shafts 3, 3, and the side clutches 5, 5 are loosely fitted onto the bushes 4, 4 so as to be slidable left and right. On the other hand, gears 6, 6 are tightly fitted to the driven shafts 3, 3 near the side walls of the mission 1, and the outer sides of the side clutches 5, 5 are always meshed with the gears 6, 6 (even if they slide). Form the tooth surface etc. Further, on both sides of the drive wheel body 2 and on the drive wheel body 2 side of the side clutches 5, 5, meshing protrusions 2a, 2a, which engage with each other, are provided.
5a, 5a are formed, and the side clutches 5,
5 with a fork or the like to engage and disengage the interlocking protrusions 2a, 2a, 5a, and 5a to intermittent power. And in Figure 1,
Span is L, width of gear 6 is W, side clutch 5
The width S of the part where the side clutch 5 slides on the surface of the bush 4 while contacting it is calculated as follows: Top, S=
Since L-(w+p+2l), the occupation ratio of this width S to the span L is small,
In this case, it is difficult to provide a sufficient width for the diameter, and the width W of the gears 6, 6 must also be made smaller, resulting in the above-mentioned drawbacks.

Therefore, in this invention, these structures were changed as shown in the sectional view of FIG. 2.

That is, the driven shafts 3, 3 are located inside the gears 6, 6.
The side clutches 5, 7 are fitted with release collars 7, 7 to which the rotation is transmitted, and are slidable onto the release collars 7, 7, and the side clutches 5,
5 is fitted over the entire width.

As a result, the width allowed for the side clutches 5, 5 is the span L minus the width W of the gears 6, 6 and the slide width l, and compared to the above configuration,
Not only can the width be increased, but also the width W of the gears 6, 6 can be increased.

In FIG. 2, 8 and 8 are metal bushes, and 9 and 9 are oil grooves that supply oil to these metal bushes 8 and 8.

As described above, since this invention operates with the above-described configuration, the following effects can be expected.

First, the release collar 7 is provided, and the entire width of the side clutch 5 is fitted onto this.
The minimum engagement width between the side clutch and the gear and the sliding width, which were necessary in the conventional example, are no longer required, and as a result, the width of the side clutch 5 can be increased, allowing for extra width in relation to the diameter. This allows for smooth operation without any stiffness when sliding.

On the other hand, this also allows the width W of the gears 6, 6 to be increased, and since the gears 6, 6 are pinions, the strength is inferior in meshing with the large gears 10, 10 on the downstream side. can be corrected.

Furthermore, these also mean that the span L of the transmission 1 can be reduced, resulting in various effects such as weight reduction, cost reduction, and design leeway.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of the power system of a conventional forestry transport vehicle, and FIG. 2 is a sectional view of the main part to which this invention is applied. Code, 2... Drive wheel body, 2a... Engagement protrusion of drive wheel body, 3... Driven shaft, 5... Side clutch, 5a... Engagement protrusion of side clutch, 6
...Gear, 7...Release collar.

Claims (1)

[Scope of utility model registration request] In a clutch structure for intermittently transmitting power between a driving wheel body 2 and a driven shaft 3 loosely fitted on one side and having a gear 6 firmly fitted on the other side, the gear 6 and the driving shaft 3 are connected to each other. A release collar 7 that rotates together with the driven shaft 3 between the driven shaft 3 and the wheel body 2 is fitted onto the outside, and the entire width of the side clutch 5 is fitted onto the release collar 7 so that it rotates together with the driven shaft 3. Insert the side clutch 5 into this release collar 7.
A clutch structure characterized in that the upper part of the clutch is slid to engage and disengage engagement protrusions 2a and 5a formed on opposing sides of a drive wheel body 2 and a side clutch 5, thereby intermittent power.