JPS6242846Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an axle device for a construction machine whose running device is a wheel type, and particularly relates to an improvement of an axle device that reduces wear on disc brakes.

A typical axle device has a structure as shown in FIG. That is, in FIG. 1, a sun gear 8 is fixed to the end of the axle shaft 9, and this sun gear 8 engages with the bullet-shaped internal gear 6 via a group of planet gears 7, so that the revolution of the planet gear 7 is directed to the wheel hub 3. The rotation of the wheels 1 and 2 is taken out as the rotation of the wheels 1 and tires 2. Further, the brake disc 4 is connected to the wheel hub 3 on the inner side of the inner end surface of the wheel 1.
It is attached to the wheel 1 and rotates together with the wheel 1. In this case, the spindle 5 does not rotate.

In this way, some conventional brake discs 4 are located inside the wheel to protect the brake discs and brake pads from dust that can wear them out.

However, in the case of a construction machine such as a wheel loader, unlike a general vehicle such as a passenger car or a truck, the body chassis 10 is arranged between the tires 2 on both sides (one side is not shown) as shown by the chain line in the figure. Depending on the working environment of the construction site, muddy water may not only fall from above but also from below.
The muddy water may splash back and splash onto the brake disc 4. It has become clear that this muddy water seeps between the brake pads that sandwich the brake discs, and that applying the brakes in this condition causes more wear on the brake discs and brake pads than normal falling dirt and dust.

In order to solve the above-mentioned problems unique to construction machines, the present invention is characterized in that muddy water that bounces off the vehicle body chassis is prevented from hitting the brake disc.

The details will be explained below using examples shown in the drawings.

FIG. 2 is a view of the main parts of the axle device as seen from above. In the figure, the brake disc 4 is the wheel 1
It is located inside the inner end surface of the wheel hub 3 and is removably attached to the wheel hub 3 with bolts, nuts, etc. Reference numeral 12 denotes brake pads which act as a component within the brake caliper 11 so as to sandwich the brake disc 4 therebetween, and the brake caliper 11 is removably attached to a brake caliper support 13 provided on the spindle 5. Reference numeral 14 denotes a bracket for attaching the covers 15, 15', which is integrally attached to the brake caliper support 13. The covers 15, 15' include a portion 15 that covers the brake disc 4 and a portion 15 that covers the brake pad 1.
The width of the 15' part is widened just like the eaves of a roof, and the 15 part has a side plate 16 only on the outside, as shown in Fig. 3, and the inside is open. It is set as. 4 and 5 are side views showing the positional relationship between the covers 15, 15', the brake disc 4, and the brake pad 12.
And, only the upper part of the brake pad 12 is covered. Further, FIG. 5 shows an arrangement in which the entire exposed portion of the brake disc 4 and the upper and lower portions of the brake pad 12 are covered.

Next, the operation of the apparatus configured as described above will be explained.

Construction machines, such as wheel loaders, are operated under all kinds of work environments at construction sites.
For example, there is a case where a person works under a belt conveyor in a quarry or the like, and muddy water falling from the belt conveyor collides with the vehicle chassis 10 and scatters around. The muddy water thus scattered bounces off the tires 2 or wheels 1, and drops of muddy water travel along the tires 2 or wheels 1 and fall onto the brake pads 12 or the brake discs 4. Furthermore, the muddy water splashed by the collision with the vehicle chassis 10 is directly splashed toward the brake disc 4 or the brake pad 12. In this way, drops of muddy water transmitted through the tires 2 and wheels 1, or muddy water splashed by the shaft chassis 10, hit the covers 15, 15' and do not directly hit the brake disc 4 and brake pads 12. Further, the side plate of the cover 15 of the brake disc 4 is open on one side, and the cover 1 of the brake pad 12 is
5' is shaped like an eave of the roof, and the cover 15,
15' is removably attached to the bracket 14 with bolts, nuts, etc., so when the brake pads 12 are worn out, replacement work can be done by using the covers 15, 1.
This can be easily done by simply removing the wheel 5' without removing the wheel 1.

According to the present invention configured as detailed above,
Since the cover that covers the brake disc and brake pads is attached to the bracket provided on the brake caliper support, it is possible to completely prevent wear of the brake disc and brake pads due to dirt particles and muddy water falling from the inside upper part of the wheel 1. .
Furthermore, one side of the cover for the brake disc portion is open and the cover for the brake pad portion is shaped like an eave, making it easy to replace the brake pads. In addition, brake disc cover 1
Since one side of the brake disc portions 5 and 15' is open, the inside of the cover will not be in a vacuum state due to the airflow generated as the brake disc 4 rotates, and therefore floating dust will be sucked in. This prevents the brake disc 4 and brake pad 12 from accelerating wear. In this way, the wear of brake discs and brake pads from falling dirt particles and muddy water, which is a problem unique to construction machines, can be completely reduced without impairing maintenance workability, and this has a great practical effect.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing the entire axle device, Figs. 2 to 5 show embodiments of the present invention;
The figure is a plan view of the main part, Figure 3 is a reduced perspective view of the cover in Figure 2, Figure 4 is a side view of Figure 2, and Figure 5 is a separate cover covering the upper and lower parts of the brake disc and brake pad, respectively. It is a side view showing an example. 4...brake disc, 5...spindle,
12...Brake pad, 13...Brake caliper support, 14...Bracket, 15,1
5'...Cover, 16...Side plate.

Claims (1)

[Scope of utility model registration request] The components include a brake disc that is removably attached to the wheel hub at a position inside the inner end surface of the wheel, and brake pads that are removably attached to the brake caliper support provided on the spindle and sandwich the brake disc. It consists of a brake caliper with a brake caliper and a brake disc cover removably attached to a bracket provided integrally with the brake caliper support. An axle device characterized by having a brake pad part shaped like an eave.