JPH0625422Y2 - Body suspension system for tracked vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a vehicle body suspension device of a tracked vehicle such as a bulldozer.

(Prior Art) Conventionally, a tracked vehicle such as a bulldozer is provided with a vehicle body suspension device using an equalizer bar as shown in FIG. 3 between the suspension and the vehicle body.

The vehicle body suspension device has a structure in which a crossbar e on the vehicle body d side is rotatably pivotally attached to the center of an equalizer bar c that is laterally suspended between the track frames b around the suspension a. The track frame b and the equalizer bar c A spherical bearing g as shown in FIG. 4 is used for the pivotal attachment portion of the pin f for pivotally attaching. (For example, Japanese Utility Model Application No. 58-7218) In the conventional spherical bearing g, the journal h of the spherical bearing g is provided on the pin f supported on the track frame b side, and the spherical surface of the journal h is provided on the equalizer bar c side. And a slidable annular bearing i is provided on the side of the equalizer bar b, and it is slid between the journal h and the annular bearing i to allow swinging of the undercarriage a with respect to the vehicle body. There is.

(Problems to be solved by the invention) However, in the conventional suspension device, since the journal h cannot be press-fitted into the pin f due to assembly, relative rotation may occur between the operating pin f and the journal h. As a result, the twist seal j provided between the journal h and the equalizer bar c may be excessively twisted and damaged early.

(Means and Actions for Solving Problems) The present invention has been made for the purpose of improving the above-mentioned inconvenience, and an equalizer bar is horizontally installed between spherical track bearings between track frames forming a suspension. In the vehicle body suspension system in which the intermediate portion of the equalizer bar and the vehicle body are connected by a pin, the spherical bearing includes a journal fitted to the pin side and an annular bearing slidably supported by the spherical portion of the journal. , The annular bearing is fitted into the fitting hole provided in the equalizer bar and then locked by the locking rings, and the cylindrical parts provided at both ends of the journal and the fitting hole opening part of the equalizer bar A torsion seal is interposed between the stepped portions provided on the shaft, and pressing members are inserted into both ends of the pin inserted into the journal of the spherical bearing, and the flap of the pressing member is inserted. By pressing the end surface of the journal with the lunge, the other end side of the pressing member reaches the end surface of the pin, abuts the pressing plate attached to the end surface of the pin by the pressing bolt through the shim, and tightens the pressing bolt. By fixing the journal to the pin by pinching the journal between the pressing members, it is possible to prevent relative rotation between the pin and the journal and prevent the torsion seal from being damaged early. It is intended to provide a vehicle body suspension device.

(Embodiment) This invention will be described in detail with reference to an embodiment shown in the drawings.

In the figure, 1 is a vehicle body of a tracked vehicle, and suspensions 2 are provided on both sides.

The undercarriage 2 has a structure in which an idler and a sprocket are provided in the front and rear portions of a track frame 3 provided in the front-rear direction of the vehicle body 1, and an endless track (both not shown) is wound between the idler and the sprocket. Then, the pin 4 is supported by the bracket 3a having slits projectingly provided on the track frame 3 around each foot 2 so as to be parallel to the track frame 3.

Both ends of an equalizer bar 5 which is laterally bridged between the track frames 3 are swingably supported via spherical bearings 6 at the intermediate portions of the pins 4 and the intermediate portion of the equalizer bar 5 is pinned. It is pivotally attached to the crossbar 1b of the vehicle body 1 by 13.

The spherical bearing 6 is a journal 6 fitted on the pin 4 side.
a and an annular bearing 6c slidably supported on the spherical portion 6b of the journal 6a. The annular bearing 6c is engaged with a fitting hole 5a provided in the equalizer bar 5 and engaged by a rear locking ring 7. Stopped and journal 6
a cylindrical portion 6d provided at both ends of a and the equalizer bar 5
A twist seal 8 is provided between the step portion 5b provided at the opening of the fitting hole 5a to prevent dust and the like from entering the sliding surface.

On the other hand, the journal 6a fitted into the pin 4 is prevented from rotating and moving in the axial direction with respect to the pin 4 by the pressing members 9 fitted to both ends of the pin 4.

The pressing member 9 has a tubular shape and has a slit,
A flange 9a that is interposed between the pin hole 2b of the bracket 3a and the outer peripheral surface of the pin 4 and that presses the end surface of the journal 6a is formed at the end portion on the journal 6a side.

The other end of the pressing member 9 reaches the end surface of the pin 4, and the pressing bolt 11 is attached to the end surface of the pin 4 via the shim 10.
Is pressed against the pressing plate 12, and the pressing bolts 11 are tightened, and the pressing members 9 and the pins 4 are fixed to the bracket 3a by fixing bolts (not shown) in a direction perpendicular to the pressing bolts 11. Journal 6 between
By pinching a, the rotation of the journal 6a can be fixed with respect to the pin 4.

Moreover, since the method of press-fitting the pressing member 9 and the pin 4 is not used, the disassembling and assembling property is good, and the bracket 3a has an advantage that complicated processing such as tap holes and surface processing is not necessary.

By adjusting the thickness of the shim 10, the journal 6
The fixing position of a and the clamping force can be adjusted.

(Effects of the Invention) As described in detail above, the present invention clamps the journal of the spherical bearing by the pressing members fitted to both ends of the pin to fix the journal to the pin, so that the journal is not operated during operation. Since sliding occurs between the annular bearings and relative rotation does not occur between the pin and the journal, it is possible to eliminate problems such as early breakage of the twist seal due to twisting force.

Further, when the sliding surface is worn, the spherical bearing can be easily removed by removing the holding bolt and the fixing bolt and pulling out the pin, so that the worn spherical bearing can be easily replaced.

As described above, this device does not use the method of press-fitting the pressing member and the pin, so the disassembling and assembling property is good, and the bracket has an advantage that complicated processing such as tap hole and surface processing is not necessary. .

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a front view of the vicinity of an equalizer bar, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIGS. 3 and 4 are conventional explanatory views. Is. 1 ... Vehicle body 2 ... Suspension 3 ... Track frame 4 ... Pin 5 ... Equalizer bar 5a ... Fitting hole 5b ... Step portion 6 ... Spherical bearing 6a ... Journal 6b ... Spherical portion 6c ... ... Annular bearing 6d ... Cylindrical part 8 ... Twist seal 9 ... Holding member 9a ... Flange 10 ... Shim 11 ... Holding bolt 12 ... Holding plate 13 ... Pin

Claims (1)

[Scope of utility model registration request] 1. A track frame 3 constituting a suspension 2
In the vehicle body suspension device in which the equalizer bar 5 is laterally mounted via the spherical bearing 6 and the intermediate portion of the equalizer bar 5 and the vehicle body 1 are coupled by the pin 13, the spherical bearing 6 is located on the pin 4 side. The journal 6a is inserted and the annular bearing 6c is slidably supported by the spherical surface portion 6b of the journal 6a. A twist seal 8 is provided between the tubular portion 6d provided at both ends of the journal 6a and the step portion 5b provided at the opening of the fitting hole 5a of the equalizer bar 5 while being retained by the retaining ring 7. And the journal 6 of the spherical bearing 6
The pressing member 9 is inserted into both ends of the pin 4 inserted into the a, and the flange 6 a of the pressing member 9 allows the journal 6 to be inserted.
The end face of a is pressed, the other end of the pressing member 9 reaches the end face of the pin 4, and the end face of the pin 4 is abutted against the holding plate 12 attached by the holding bolt 11 via the shim 10 to press the holding bolt. A body suspension system for a tracked vehicle, in which the journal 6a is fixed to the pin 4 by clamping the journal 6a between the pressing members 9 by tightening 11.