US 6,681,903 B2 · Wheel hub for vehicles

Abstract

A wheel hub for vehicles has a built-in brake assembly for stopping and parking the vehicle. A parking piston and a spring assembly of the parking brake are arranged within the ring gear support member, and impact on the brake piston of the multi-plate friction type wet brake, and the ring gear support member. The parking brake has a device for manually de-activating the parking brake from outside the hub. The device includes a screw that overrides spring pressure to move the parking piston away from the brake piston to manually release the parking brake.

Drawings

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Drawings

Claims9

Dependent claims

A wheel hub for a vehicle having a built-in brake assembly for stopping and parking the vehicle, the hub comprising:

a hollow axle casing;
a hollow axle housing rotatably mounted on the axle casing;
a planetary gearing and a multi-plate friction wet brake that are coupled to a drive shaft of the vehicle, the multi-plate friction wet brake having inner brake plates, outer brake plates, an annular thrust plate, and a brake piston displaceable in an axial direction that are arranged in their entirety within a ring gear support member splined on a periphery of said axle casing without rotation;
and
a parking brake with a second piston and a spring assembly,
wherein the second piston and the spring assembly are arranged within the ring gear support member, impact on the brake piston, and on the ring gear support member,
wherein the parking brake has means for manually de-activating said parking brake from outside said hub, and
wherein the second piston is an annular piston moveably arranged on an outer periphery of a disk holding the ring gear support member against the axle casing, the disk being fixed to the axle casing.

5 more elements

Dependencies are inferred from the claim text.

Description3,421 words

Summary1,408 words

#1. Field of the Invention

#The invention relates to a wheel hub for vehicles having a built-in brake assembly for stopping and parking the vehicle. For this, the wheel hub comprises a hollow axle casing fixed to a vehicle frame, a hollow axle housing rotatably mounted on the axle casing and carrying a vehicle wheel rim, a planetary gearing and a multi-plate friction type wet brake both being coupled to a drive shaft driven by a wheel hub of the vehicle, wherein the multi-plate friction type wet brake having inner brake plates, outer brake plates and a brake piston displaceable in axial direction is arranged in its entirety within a ring gear support member splined on the periphery of said axle casing without rotation, and the brake for parking the vehicle has a piston and a spring assembly.

#2. Description of the Related Art

Brief description of the drawings5 figures

#Embodiments of this invention will now be described by way of example with reference to the accompanying drawings, in which

#FIG. 1 illustrates a preferred embodiment of the wheel hub as in this invention in cross sectional view;

#FIG. 2 is a side elevational view of a part of the embodiment as in FIG. 1: the helical springs and the piston of the parking brake;

Detailed description1,907 words

#U.S. Pat. No. 5,088,967 describes a driven axle assembly of heavy duty vehicles with planetary gearing and a multi-plate friction type wet brake. This description serves as a basis for this discussion of preferred embodiments in this invention. In the drawings, a wheel hub unit and the portions adjoined to it are shown; the same assembly is on the other end of the driven axle of the vehicle.

#FIG. 1 shows a wheel hub 2 providing the rotational movement for moving the vehicle and being coupled to an axle casing 1 of the vehicle. To the axle casing 1, a hollow spindle 3 is stationarily fixed, in the hollow inside of which a drive shaft 4 connected to the main drive of the vehicle is let through. The wheel hub 2 has an axle housing 5 rotatably arranged on the hollow spindle 3. Onto a flange 6 of the axle housing 5, a wheel rim of the wheel of the vehicle is detachably connected at a bore 7. The axle housing 5 is rotatable due to roller bearings 8, 9, with conical rollers, in this example. The inside of the wheel hub unit is sealed against the environment by a seal 10.

#On an outer toothed surface 12 of hollow spindle 3, a ring gear support member 11 is engaged without rotation. Ring gear support member 11 is held in place by a disk 13 detachably fixed to hollow spindle 3 by screws 14.

Facts

Application

09/799,734Filed 7 Mar 2001

Priority

HU 00010568 Mar 2000

Published

US 2001/0025749 A14 Oct 2001

Granted

27 Jan 2004

Term ended

27 Nov 2021

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment, including 265 days of adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification3 codes

B60T 1/065
Acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels: employing disc
B60T 1/062
Acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels: acting on transmission parts
B60T
Vehicle brake control systems or parts thereof

Timeline

8 Mar 2000Priority claimedHU 0001056
7 Mar 2001Application filedUS 09/799,734
15 May 2001Assigned to Raba-Futomu Gyarto Es Kereskedelmi Kft.assignment of assignor's interest
4 Oct 2001PublishedUS 2001/0025749 A1
27 Jan 2004GrantedUS 6,681,903 B2
27 Nov 2021Term endedEstimated, includes 265 days of adjustment

Wheel hub for vehicles

Life of this patent

Wheel hub for vehicles

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims9

Description3,421 words

Drawings

Classification3 codes

Life of this patent

Description3,421 words