JPS6116231Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention includes a pair of left and right tapered roller bearings interposed between the guide wheel body and a support shaft therefor, and a pair of attachments for connecting the support shaft to the truck frame. The present invention relates to a mounting structure for a guide wheel for a crawler, in which members are disposed on both left and right sides of the guide wheel body and fitted onto the support shaft.

In general, a crawler type traveling device is subjected to a large stress in the lateral direction perpendicular to the direction of travel, and a load in the thrust direction is applied to the guide wheel shaft support. Therefore, in order to cope with this problem, taper roller bearings have traditionally been used. Since tapered roller bearings allow for much smoother high-speed running than bushings, there is a strong desire to use tapered roller bearings, and there are even examples of them being used in actual crawler-type traveling equipment.

However, compared to bushings, tapered roller bearings require the bearing to be pressed against the guide ring body side with an appropriate force in order to prevent slips between the guide ring body and the outer ring of the bearing, and to fully utilize the bearing's function. It is necessary to keep it. Therefore, conventionally, as shown in FIG. 5, a tightening screw 1 is attached to a support shaft 4 between a bearing 2 and a mounting member 3 to position the mounting member 3 with respect to the support shaft 4. Therefore, it has become necessary to form a stepped portion 5 on the support shaft 4 with which the end surface of the mounting member 3 comes into contact, and as a result, the support shaft 4 is likely to break due to stress concentration at the step portion 5.

The purpose of the present invention is to enable the bearing to be pressed appropriately while also allowing the mounting member to be positioned without requiring the step, thereby forming the support shaft advantageously in terms of strength. do.

Next, embodiments of the present invention will be described based on the drawings.

A driving wheel 7 is attached to one front and rear end of the truck frame 6, and a tensioning wheel 8 is attached to the other end, and a guiding wheel is attached to the upper and lower sides of the frame 6 between the two wheels 7 and 8, respectively. The wheel 9 is attached, and the crawler 10 is wound around the entire wheel body, thereby forming a crawler traveling device that is installed in construction vehicles such as backhoes and dozers, as well as agricultural vehicles such as combines. There is.

The guide ring 9 is constructed as shown in FIGS. 2 to 4.

That is, the guide ring main body 11 is rotatably attached to the support shaft 4 via a pair of left and right tapered roller bearings 2, 2, and a pair of mounting members 3, 3
are arranged on the left and right sides of the guide wheel main body 11 and fitted onto the support shaft 4, and a floating seal 12 that prevents muddy water from entering the bearing 2 is attached to the guide ring main body 11. It is interposed between the guide wheel body 11 and the mounting member 3 to connect the mounting members 3 to the track frame 6, and to prevent malfunction of the guide wheel body 11 due to muddy water.

The end face of each of the mounting members 3 is connected to the bearing 2.
Each of the mounting members 3 is brought into contact with the inner ring separately, and one mounting member 3 is mounted on the spindle 4 with a lock pin 13 so as not to be slidable or relatively rotatable, and the other mounting member 3 is mounted on the spindle 4 so as to be slidable. At the same time, a shim 18 is interposed between the slidable mounting member 3 and a mounting member retaining member 17 which is removably attached to the support shaft 4 by a bolt 14 screwed onto the end face thereof. Each of the bearings 2 is pressed against the guide ring body 11 by a mounting member 3. In other words, the mounting member 3
Press the bearing 2 against the guide ring body 1 by
In addition to preventing slips from occurring between the guide ring main body 11 and the outer ring of the bearing 2, the structure is configured such that the pressing force for this purpose is adjusted by adjusting the thickness and number of the shims 18, and furthermore, the sliding The mounting member 3 can freely position the mounting member 3 with respect to the support shaft 4.
This is performed by contact with the bearing 2 and the retaining member 17.

The pair of lock pins 16 inserted between the retaining member 17 and the support shaft 4 lock the retaining member 1.
7 is prevented from rotating with respect to the spindle 4, and
The bolt 14 is prevented from rotating by the retaining member 17 and the plate 15 which is engaged with the bolt 14, thereby preventing the bolt 14 from loosening.

Both of the mounting members 3 are slidably mounted on the support shaft 4, and members 17 for preventing the mounting members from coming off are mounted on both ends of the support shaft 4.
The shim 18 may be interposed on both sides so that the bearing pressing force can be adjusted on both sides of the mounting member 3.

In summary, the present invention provides the above-mentioned crawler guide ring mounting structure in which the end faces of the mounting members 3 are brought into contact with the bearing 2 separately, and at least one of the mounting members 3 is slidably mounted. The slidable mounting member 3 and a bolt 14 screwed onto the end face of the support shaft 4 are attached to the support shaft 4 and the bearings 2 are pressed against the guide ring body 11 by the mounting member 3. It is characterized in that a shim 18 is interposed between the mounting member and the member 17 for preventing the mounting member from coming off.

In other words, by adjusting the thickness and number of shims 18, the pressing force of the mounting member 3 against the bearing 2 changes, so the bearing 2 can be pressed appropriately.
Since positioning with respect to the support shaft 4 is performed by applying the support shaft 4 to the support shaft 4, there is no need to make the support shaft 4 into a shape with a stepped portion which is disadvantageous in terms of strength as in the conventional case, and it is possible to firmly support the guide ring body 11. Summer. Therefore, compared to bushings, it is possible to adequately support the guide wheel by supporting loads in the thrust direction, and a mounting structure that can withstand high-speed running is obtained, thereby realizing the full true value of tapered roller bearings. It has now been possible to utilize this technology.

[Brief explanation of the drawing]

The drawings show an embodiment of the mounting structure for a guide wheel for a crawler according to the present invention, FIG. 1 is a side view of the crawler traveling device, FIG. 2 is a longitudinal sectional view showing the guide wheel structure, and FIG. 3 is a side view of the same. , FIG. 4 is a cross-sectional view along the - arrow in FIG. 3, and FIG. 5 is a conventional structural diagram corresponding to FIG. 2. 2... Bearing, 3... Mounting member, 4... Support shaft, 6... Track frame, 11... Guide wheel body, 14... Bolt, 17... Removal prevention member, 18
...Sim.

Claims (1)

[Scope of utility model claims] A pair of left and right tapered roller bearings 2, 2 are interposed between the guide wheel body 11 and a support shaft 4 therefor, and a pair of mounting members 3, 3 for connecting the support shaft 4 to the track frame 6. This is a mounting structure for a crawler guide wheel which is fitted onto the support shaft 4 in a state where the guide wheels are arranged on both the right and left sides of the guide ring main body 11, and the end surfaces of each of the mounting members 3 are connected to the bearing 2 separately. At the same time, at least one of the mounting members 3 is slidably mounted on the support shaft 4, and each of the bearings 2 is pressed against the guide ring main body 11 by the mounting member 3,
A shim 18 is interposed between the slidable mounting member 3 and a mounting member retaining member 17 attached to the support shaft 4 by a bolt 14 screwed onto the end face thereof. Mounting structure for guide wheels for crawlers.