JPS6242627Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an elastic endless track belt (hereinafter referred to as a crawler) that is mounted on an agricultural vehicle such as a combine harvester or a similar vehicle.

Generally, such a crawler has lugs arranged in parallel at regular intervals on the ground surface side in order to obtain traction force. When such crawlers travel in wetlands such as wet fields, wet soil may get clogged between the lugs, impeding the function of the lugs and making it impossible to obtain sufficient traction force. A flat part with a wide lug interval is provided between the non-shortened lugs at the forward end of both ends of the shortened lug, so that even if wet soil becomes clogged there, it will easily fall out when it reaches the end pulley and rotates. It is proposed to maintain traction. However, on the other hand, when driving on normal hard roads other than wetlands, the spring constants of both lugs are necessarily different from each other, so the load applied to the wheels when the wheels pass over both lugs is There is a problem in that the amount of deflection is different from each other, which causes vibration of the vehicle body supported by the wheels during running.

An object of the present invention is to minimize the vibrations of the vehicle body caused by the shortened lugs as described above.

In order to solve this problem, we took the following technical measures. In other words, in order to equalize the amount of deflection of both lugs, we focused on making the spring constants of the lugs the same. In a crawler in which horizontal lugs are formed on the outer periphery of the endless body and the length of every other horizontal lug is shortened, the width of the shortened lugs in the circumferential direction of the endless body does not become smaller than the width of the non-shortened lugs over the entire length of the crawler. As a result, the spring constants of both lugs are made equal or similar.

Thus, according to the present invention, by equalizing the spring constant of each lug, the amount of deflection of each lug when passing the wheels is equalized, and therefore the vibration of the aircraft when traveling on a hard road surface is normally reduced. On the other hand, when traveling in a wetland such as a wetland, the difference between adjacent non-shortened lugs at the forward end of the shortened lugs is the same as when using a crawler with uniformly sized lugs. The wide, flat space avoids clogging of wet soil that is eaten into that area, and therefore allows at least a partial traction effect of the lug to continue, resulting in good running without slipping. It is.

The present invention will be explained in more detail below with reference to the accompanying drawings.

1 to 4 are views of a part of the crawler according to the present invention viewed from the outer periphery, and the crawler consists essentially of an endless rubber band 1 and embedded at regular intervals in the circumferential direction. Core bar 2 (see Figure 6)
and a tensile reinforcing material (not shown) such as cord lane buried in the outer circumferential side of the core metal. Sprocket holes 3 are formed in the widthwise central part of the endless rubber band 1 and are arranged in a row in the circumferential direction.The sprocket holes are formed between adjacent core bars 2, and are connected to the vehicle body. The gears are designed to sequentially engage the teeth of a drive sprocket attached to the drive sprocket.

Horizontal lugs are formed on the outer circumferential surface of the endless rubber band 1 that protrudes outward and extends in the width direction of the crawler or in a direction slightly oblique thereto, and these lateral lugs are substantially It is provided corresponding to the buried position of the core bar 2, and its circumferential cross section has a substantially trapezoidal shape. The length (in the crawler width direction) of these lateral lugs is shortened every other time, so that the adjacent non-shortened lugs 4a are located at the front end of the shortened lugs 4a.
A wide flat space 5 is provided between b and 4b. As mentioned above, the function of this space 5 is to make it easier to drain the wet soil that gets into the space when driving in a wetland, and to prevent soil from clogging. It kicks off the dirt to provide traction and provides slip-free running.

In such a crawler, the present invention is such that the shortened lugs 4a are deflected to a greater extent than non-shortened lugs due to the load from the rolling wheels that carry the weight of the machine, causing the rolling wheels rolling circumferentially on the inner peripheral surface of the crawler to move up and down. caused,
The purpose of this invention is to deal with the problem of aircraft vibration caused by this, and the present invention is basically based on the idea that the spring constants of all lugs are made equal in order to equalize the amount of deflection of all lugs. Tozuku. In order to achieve this, the present invention is configured such that the width of the shortening lug 4a in the circumferential direction of the endless strip is not smaller than the width of the non-shortening lug 4b over its entire length.

In FIG. 1, the width of the shortened lug 4a is uniformly expanded as a whole, and the cross-sectional area of the non-shortened lug 4b is increased as shown in FIG.
The figure shows the case where it is increased compared to . In the case of FIG. 2, both sides of the shortened lug 4a are bulged out higher toward the center, and FIG. 3 shows a case where only one side is bulged out greatly. FIG. 4 shows a modification of the embodiment shown in FIG. 1 in which the non-shortened lug is replaced by a diagonal lug 4b.

FIG. 5 shows a modification of the embodiment shown in FIG. As shown in the figure, in these variations, a lug is protruded from the side of the crawler to form a fin-like part 6, and this fin-like part is formed by cutting the part between the lugs on the side of the crawler. It can be formed by chipping. A crawler provided with such fin-like portions is particularly suitable for running in wetlands such as wet fields. In other words, between the fins 6, there is only a small area where the infiltrated soil can be held and retained, and since the fins can be elastically deformed in the circumferential direction of the crawler, the infiltrated soil is extremely easy to fall out. The fins always bite into the wetland surface and kick the soil, providing traction for the crawler. Therefore, this traction force imparting effect is
Together with the effect of improving the traction force due to the provision of the above-mentioned space 5, a large traction effect of the crawler is brought about when traveling in a wetland. When the fin-like portion 6 is provided on one side of the crawler as described above, it is preferable that the fin-like portion 6 is placed on the inside of the vehicle body. The reason for this is that soil infiltrates onto the inner peripheral surface of the crawler from between the fins, accumulates in the direction changing part of the crawler, grows into a large lump, and then falls onto the unharvested rice on the side of the machine. This is to avoid.

However, despite such considerations, it is not possible to completely prevent the clod from falling outward from the crawler. Figures 7 to 16 show devices for preventing such clods from falling.

Generally, the crawler is wound around a driving sprocket at the front direction changing part, and around an idler 7 at the rear direction changing part, as shown in FIG. The soil that has entered the inner circumferential surface of the crawler stays on the side of the idler 7, gradually gathers, becomes a larger lump, and finally rolls down to the side.

7 to 12 show a case where a cylindrical protrusion 8 is formed on the side of an idler 7 attached to the vehicle body in order to prevent the generation of such large lumps of soil. This cylindrical projection 8 projects toward the outside of the crawler and terminates slightly before the outer edge of the crawler. Further, they are arranged at a slight interval with respect to the inner circumferential surface of the crawler. Therefore, the soil that collects on the side of the idler 7 enters the narrow space below the cylindrical projection 8, so even if it collects, it cannot become a large lump of soil, and even if it starts to grow, it is immediately destroyed and falls on the crawler side. flowing down towards

The above-mentioned cylindrical projection 8 may be configured in a cylindrical shape as shown in FIG.
), stepwise (FIG. 11), or spirally (FIG. 12).

Further, as shown in FIG. 8, it is preferable that the cylindrical projection 8 is configured to be detachable from the idler 7. In the example shown in FIG. 8, a rim 9 is provided on the outer side of the idler 7, and the cylindrical projection 8 is fitted onto this rim. Small protrusions 11 provided on the inner circumferential surface of the cylindrical protrusion engage with each other to provide a firm locking condition.

13-16 show other devices for preventing soil from accumulating on the sides of the idler 7. This device consists of two plates 12 that are combined into a mountain shape, and the idler 7 is sandwiched between the two plates 12 with the top of the mountain facing forward in the direction of movement of the crawler 13, in order to actively remove the soil that has settled on the inner circumferential surface of the crawler. It is attached and supported by a support arm 15 that projects laterally from the fuselage 14 at the top of the mountain. As can be easily understood, the soil on the inner peripheral surface of the crawler reaches the plate 12 as the crawler advances, and is discharged from there to the side of the crawler as shown by arrow A.

Although the plate 12 is fixed in the above,
As shown in FIGS. 15 and 16, this may be swung from side to side using the top of the mountain as a fulcrum. This swinging is caused by the tension spring 1 between both plates 12.
6 is attached, and tapered protrusions 17 are provided on both sides of the idler 7, and the tapered protrusions are brought into engagement periodically with protrusions 18 provided on the inside of the plate body 12 when the idler 7 rotates. It will be done. That is, when the tapered protrusion 17 and the protrusion 18 are engaged, the plate body 12 is expanded against the action of the spring 16, and when the engagement is released, the plate body 12 is closed by the action of the spring 16.

[Brief explanation of the drawing]

Figures 1 to 5 are partial views of five embodiments of the crawler according to the present invention viewed from the ground plane, Figure 6 is a sectional view taken along the - line in Figure 1, and Figure 7 is the crawler according to the present invention. 8 is a schematic side view of a part of the crawler, showing a case where a device for preventing soil clods from accumulating and growing is attached to the rear part of the inner peripheral surface of the crawler; FIG. 8 is a schematic side view of a part of the crawler; An example of a growth inhibiting device and an axial cross-sectional view of its attachment part, FIGS. 9 to 12 are perspective views showing other examples of the above device, and FIG. 13 is yet another example of a clod retention growth inhibiting device attached to a crawler. 14 is a schematic plan view of the device shown in FIG. 13, FIG. 15 is a drawing similar to FIG. 14 showing a modification of the device shown in FIGS. 13 and 14, and FIG. The figure is a diagram showing the operating state of the device shown in FIG. 15. The correspondence relationship between the main parts shown and the symbols is as follows. 1...Rubber endless belt-like body, 2...
... Core bar, 4a... Shortened lug, 4b... Non-shortened lug.

Claims (1)

[Scope of utility model registration request] Horizontal lugs are formed on the outer periphery of the endless belt-like body in correspondence with the core metals embedded at regular intervals in the circumferential direction within the rubber endless belt-like body, and the length of the horizontal lugs is shortened every other time. The width of the shortened lug in the circumferential direction of the endless strip is configured such that it is not smaller than the width of the non-shortened lug throughout its length, so that the spring constants of both lugs are equal or approximated. Features an elastic endless track belt.