JPS5924606Y2 - Track belt slippage prevention device in tracked traveling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a device for preventing a track belt from coming off in a tracked traveling device.

Harvesting machines such as combines and harvesters employ tracked traveling devices having endless track bands.

Compared to wheeled types, tracked running systems have lower ground pressure and are suitable for driving in wet fields, and also have excellent running performance, such as the fact that the belly of the aircraft does not support you when crossing field ridges or when there are ups and downs. This is because it has excellent aspects.

However, when a tracked traveling device is running on a highly uneven road surface, the ground surface of the endless track belt that the track wheels are stepping on climbs up on stones, etc., and is pushed to the side as shown in Figure 3. However, in the previous model, the track rollers could not slide in the axial direction, so the endless track belt was pushed out to the side against the track retaining action of the track rollers, as shown in Figure 5. I end up.

In this case, the endless track belt is bent back and forth as shown in Fig. 5 (a), and when it is further turned from this state, once it has left the track, the endless track belt automatically returns to its normal position. Because it is unable to return to the track, the running side is gradually pushed out, and it is often seen that the entire thing is shifted to the side and comes off.

The present invention has devised a device for preventing the track belt from coming off in a tracked traveling system, which eliminates the above-mentioned drawbacks of the tracked traveling system with a simple configuration.
And in one equipped with a tracked traveling device A in which a track belt d is suspended between idle wheels 6b in left and right double rows, the drive wheel 4 is slid in the axial direction on the drive shaft 3 installed on the chassis a. The idle wheel 6b is rotatably mounted on the idle shaft 5b, and the endless track belt d is stepped between the drive wheel 4 and the idle wheel 6b. track roller 6a
Track roller shaft 5a that supports...
... is non-rotatably fixed to the chassis a via its engaging portion 5', and has a straight shaft-shaped support portion 5'' formed on the other side, and the support portion 5'' supports the track roller 6a. Cylindrical fitting part 6
In addition to the axial fitting length of ``, the center of the fitting portion 6'' is 50 minutes from the center of the tooth width of the meshing teeth of the drive wheel 4, which is not slidable in the axial direction, of 50 minutes of the contact length of the track belt d. The track roller shaft 5a...
A tracked traveling system characterized in that a fitting part 6'' of the track roller 6a is slidably and rotatably fitted in the supporting part 5'' of the track roller 6a in the axial direction. This is a device to prevent the track belt from coming off in the equipment.

The present invention will be described in more detail with reference to embodiments illustrated in the drawings.

FIG. 1 shows a state in which a tracked traveling device A according to the present invention is adopted as a mobile threshing machine, and B is a threshing machine mounted and fixed on a chassis a.

The tracked traveling device A has a chassis a, a pair of drive wheel devices b protruding from the left and right sides of the chassis a, and a track roller device C1 and a track belt d.

e is a control device, and f is a prime mover.

The chassis a is formed by connecting vertical rods 2, 2 to the left and right sides of a horizontal rod 1.

The drive wheel device has a drive wheel 4 with meshing teeth attached to a drive shaft 3 installed on the longitudinal rods 2, 2 so as to protrude from the left and right sides of the chassis ACR) so as to be unable to slide in the axial direction and to rotate coaxially. Pivotally attached (not shown).

The orbital wheel device C has various types of support shafts 5 arranged in different numbers on the vertical rods 2, 2 of the chassis a so as to protrude to the left and right sides thereof, and orbital wheels 6 supported by the respective shafts.

The various support shafts 5 include track roller shafts 5a... and idle shafts 5b, and the orbital wheels 6 include track rollers 6a... and idle wheels 6b that are pivotally supported on the support shafts 5. include.

An idle shaft 5b is further fixed to the vertical rods 2, 2 in a non-rotatable manner on the front and rear sides opposite to the drive shaft 3, and the idle wheel 6b is rotatably mounted on the idle shaft 5b. .

The endless track band d is made of rubber, and has meshing holes 7, 7 in which the meshing teeth of the drive wheel 4 mesh at a predetermined pitch in the circumferential direction.
. . . are bored, and anti-explosion protrusions 8, 8 are provided in the circumferential direction on the inner peripheral surface side on both the left and right sides of the engaging holes 7, 7, .
...... is established.

The control device e has left and right turning levers 9 and 10.

The prime mover f transmits power to the drive wheel system and to the input section of the threshing machine B via a suitable transmission (not shown).

The track roller 6a has a cylindrical circumferential surface with a concave shape in the center, and the contact portion 6' with the inner circumferential surface on the grounding side of the endless track belt d and the retaining protrusion 8 are secured. It has a fitting portion 6'' and a cylindrical fitting portion 6'' that fits into the track roller shaft 5a.

In addition, 11 is a bearing metal driven into the fitting part 6'' of the track roller 6a, and is designed to avoid fitting the fitting part 61 directly to the track roller shaft 5a and to obtain smooth free rotation. This was adopted above.

The track roller shaft 5a, which supports the track roller 6a, which steps on the endless track band d between the drive wheel 4 and the idle wheel 6b, is arranged in the longitudinal direction of the chassis a. A supporting part 5'' is formed to support the engaging part 5' with the rod 2 and the fitting part 6'' of the track roller 6a, and is fixedly engaged with the engaging part 5' in a non-rotatable manner. do.

The other supporting part 5'' on the opposite side to the engaging part 5' of the track roller shaft 5a... is on the vertical axis, and the supporting part 5''
"The length is the cylindrical fitting part 6 of the track roller 6a.
In addition to the axial fitting length of ``'', the center of the fitting part 6'' is 50 times the ground contact length of the track band d with respect to the tooth width center of the meshing teeth of the drive wheel 4 which cannot be slid in the axial direction. The length shall be such that it has a sliding allowable portion that allows sliding in the left and right directions by more than 1/2.

In addition, the contact length of the endless track band d is the distance between the axes of the drive shaft 3 and the idle shaft 5b in the illustrated example.

Then, a fitting part 61 of the track roller 6a... is fitted to the support part 5'' of the track roller shaft 5a...
'' is fitted so as to be slidable and rotatable in the axial direction, and an endless track belt d is suspended around the drive wheel 4 and the track roller 6.

According to the tracked traveling device A of the present invention having such a configuration,
When the ground surface of the endless track band d, which is the part that the track roller 6 steps on during running, rides on a stone or the like, it is pressed laterally as shown in FIG. 3.

At this time, the track roller 6 is also subjected to this pressure, but due to the track holding structure with the endless track belt d, the track roller 6 responds to the sideward movement of the endless track belt d as shown in the opening diagram of FIG. It is slid toward one side of the shaft 5a in the axial direction.

In this state, after the endless track belt d runs around and overcomes stones, etc., the restoring force due to the track holding action of the endless track belt d, the driving wheel 4, and the idle wheel 6b causes the endless track belt d to move up and down. ~Ratsu roller 6 is track roller shaft 5
It is quickly slid to the other side in the axial direction of a and returned to the normal orbit.

Therefore, the entire endless track belt d is not displaced laterally and removed from the drive wheel device or the track roller device C.

As described above, the present invention has a simple structure in which the track roller that steps on the endless track belt is fitted onto the track roller shaft so that it can slide in the axial direction and has an axial sliding portion. This provides an excellent effect of effectively preventing the endless track belt from coming off the drive wheel device or track roller device.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a mobile threshing machine that employs a tracked traveling device according to the present invention, Fig. 2 is a side sectional view of the main parts of the device of the present invention, and Fig. 3 is an explanation of the operation of the device of the present invention. Figures A and 0 of FIG. 4 are schematic diagrams for explaining the operation of the device of the present invention, and diagrams A and 0 of FIG. 5 are schematic diagrams for explaining the operation of the conventional device. Explanation of the main symbols in the drawings, A...Track type traveling device, a.
... Chassis, d... Track belt, 3... Drive shaft, 4
... Drive wheel, 5... Support shaft, 6... Orbit roller.

Claims (1)

[Scope of utility model registration request] In a vehicle equipped with a tracked traveling device A in which a track belt d is suspended between the front and rear drive wheels 4 and an idle wheel 6b in left and right double rows, the drive shaft 3 installed on the chassis a has the drive wheels 4 The idle wheel 6b is rotatably supported on the idle shaft 5b, and the endless wheel 6b is mounted on the idle shaft 5b so as to be able to freely rotate. The track roller shafts 5a, which support the track rollers 6a, which step on the track belt d, are fixed to the chassis a through their engaging portions 5' so as not to rotate. , on the other side there is a straight shaft bearing part 5''
In addition to the axially fitting length of the cylindrical fitting part 6'' of the track roller 6a, the supporting part 5'' has a width centering on the tooth width of the meshing teeth of the driving wheel 4 which cannot be slid in the axial direction. On the other hand, the fitting part 6
The center of the track roller shaft 5 is arranged so that the center of the track roller shaft 5 is allowed to slide to the left and right at least 1/50 of the contact length of the endless track belt d.
The track roller 6a is attached to the support portion 5'' of a...
A device for preventing disengagement of a track belt in a tracked traveling device, in which a fitting portion 5 /// is slidably and rotatably fitted in the axial direction.