JPS599993Y2 - Rolling wheel mounting structure of crawler type traveling device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting structure for simply and reliably mounting a plurality of rolling wheels that slidingly support crawler tracks of a crawler-type traveling device.

Conventionally, in the work of attaching the above-mentioned rolling wheels to the frame body of a crawler-type traveling device, the rolling wheel shaft, which rotatably supports the rolling wheels with a key plate, and the shaft mounting bracket attached to the lower part of the frame body are attached. were connected as one.

However, when using a key plate, a manufacturing process is required in which the shaft end of the rolling wheel shaft is cut into a shape using a milling cutter, etc., and when the key plate is attached to the frame body or mounting bracket with bolts, the key plate is Since it was exposed to the outside, there was a risk of damage from gravel, pebbles, etc.

The present invention was devised in consideration of the current situation, and its purpose is to integrally connect the above-mentioned rolling wheel shaft and shaft mounting bracket with a headed pin and a snap ring instead of a key plate. We have created a mounting structure for rolling wheels that fully fulfills the original mission of preventing the thrust of the rolling wheel shaft and preventing rotation of the coaxial shaft mounting bracket, and also enables inexpensive production and easy installation of the coaxial. This is what we intend to provide.

The present invention provides a rolling wheel mounting structure for a crawler-type traveling device in which the crawler track is guided and supported by the rolling wheels between the drive wheel and the induction wheel provided at both ends of the endless track frame. A shaft mounting bracket having a shaft hole in the center is removably attached to the shaft, and both ends of a rolling wheel shaft that rotatably supports the rolling wheel are fitted into the shaft hole of the bracket, and the shaft is mounted on the peripheral wall of the bracket. The shaft mounting bracket and the rolling wheel shaft are integrated by inserting the headed pin loosely into the pin mounting hole and the pin insertion hole provided at the end of the rolling wheel shaft at right angles to the shaft center. A crawler type characterized in that both shaft ends of the rolling wheel shaft are fixed to the outer end surface of the shaft mounting bracket with snap rings in order to prevent the rolling wheel shaft from thrusting. This relates to a rolling wheel mounting structure of a traveling device.

The mounting structure for the rolling wheels will be described in detail with reference to FIGS. 1 to 3.

FIG. 1 is an overall view of a crawler-type traveling device (a drag shovel is exemplified in the present invention) equipped with the mounting structure according to the present invention, and the device generally consists of an upper distribution body 1 and a lower part. It consists of a rotating body 2, and the upper rotating body is composed of a driver's seat 3, a rotating mechanism 4, an excavating shovel 5, and first and second arms 6 and 7 for driving the shovel. In addition, the lower drive groove 2 has a structure of a crawler belt 8, drive wheels and induction wheels 9, 10 that drive the crawler belt in a stretched state, and upper rolling wheels 11 and lower rolling wheels 12 that stabilize the stretched state. have.

The mounting structure of the rolling wheel according to the present invention is exclusively related to the mounting structure of the lower rolling wheel 12 described above, and the structure is similar to that of the second rolling wheel.
This is shown in detail in FIGS.

In the figure, reference numeral 13 denotes a rolling wheel shaft that rotatably supports the lower rolling wheel 12 on which the crawler belt 8 and connecting pin 8' slide, via a floating mechanism 14, and 15 denotes a frame body 16 of the traveling device. This is a shaft mounting bracket that is fixed to a required lower part of the shaft with a mounting bolt 17 and pivotally supports both wheel ends of the rolling wheel shaft 13.

Further, 18 is a headed pin that integrally connects the rolling wheel shaft 13 and the shaft mounting bracket 15, and its head is recessed in the mounting surface of the shaft mounting bracket 15 that contacts the bottom end surface of the frame body 16. The shaft body connects the base end of the shaft mounting bracket 15, the shaft end of the rolling wheel shaft 13, and the top of the shaft mounting bracket 15 through the shaft. At this time, the pin insertion hole 4 drilled at the end of the shaft perpendicular to the shaft center has the necessary backlash (
clearance).

Furthermore, the rolling wheel shaft 13 has snap rings 21 at both ends thereof.
This is to reliably prevent the rolling wheel shaft 13 from moving in the axial direction due to play between the pin insertion hole 20 and the headed pin 18.

With the above structure, even if the load applied to the crawler track is transmitted as a thrust to the rolling wheel shaft via the rolling wheels when the traveling device is running, the snap ring and headed pin will essentially ensure coaxial alignment. Axis movement can be prevented, and the headed pin can also prevent coaxial rotation.

As described above, the present invention has the following effects.

(1) Since the rolling wheel shaft and the shaft mounting bracket can be integrally connected by a head pin and a snap ring, the coaxial movement due to the thrust transmitted from the crawler track to the rolling wheel shaft via the rolling wheel when the traveling gear is running is possible. Axial movement can be completely prevented, and coaxial rotation can also be completely prevented using the headed pin.

(2) Since cutting of the shaft end of the rolling wheel shaft, which is necessary when using the key plate, can be omitted, the manufacturing process can be simplified and manufacturing costs can be reduced.

(3) The structure is simpler than when using a key plate, and since the headed pin is completely surrounded by the rolling wheel shaft and mounting bracket, damage caused by gravel, pebbles, etc. can be reduced.

(4) Since the shaft through hole drilled on at least one side of the rolling wheel has play, the shaft installation work is simplified, and the processing cost for drilling the same hole can be reduced, and the rolling wheel due to the play The axial movement of the shaft is reliably prevented by the snap non-lock,
This eliminates the inconvenience caused by the presence of rattles.

[Brief explanation of drawings]

Fig. 1 is an overall view of a crawler-type traveling device equipped with a mounting structure for rolling wheels according to the present invention, Fig. 2 is a detailed sectional view of the mounting structure, and Fig. 3 is a sectional view taken along the line I-I in Fig. 2. It is.

Claims (1)

[Scope of utility model registration request] In a rolling wheel mounting structure for a crawler-type traveling device, which is configured to guide and support a crawler track by rolling wheels between a drive wheel and a guide wheel provided at both ends of a track frame, a shaft is provided at the center of the lower edge of the track frame. A shaft mounting bracket having a hole is removably mounted, both ends of a rolling wheel shaft that rotatably supports a rolling wheel are fitted into the shaft hole of the bracket, and a pin mounting hole is provided on the peripheral wall of the bracket. and a shaft mounting bracket for integrally connecting the rolling wheel shaft by inserting a headed pin loosely into a pin insertion hole provided at the shaft end of the rolling wheel shaft and perpendicular to the shaft center, Moreover, a recess is provided in the peripheral wall of the shaft mounting bracket at the upper end of the pin mounting hole, and the head of the headed pin is buried in the recess, and between the pin insertion hole and the headed pin. In order to create the required backlash and to prevent the rolling wheel shaft from thrusting, both shaft ends of the rolling wheel shaft are secured to the outer end surface of the shaft mounting bracket with snap pulls, and the pin insertion holes and A rolling wheel mounting structure for a crawler type traveling device configured to prevent the rolling wheel shaft from sliding due to play between the head pin and the rolling wheel shaft.