BACKGROUND
Control arms have been are an important component of a vehicle's suspension since the advent of multi-component suspensions. Control arms allow up and down movement of the suspension while securing the steering knuckles, spindles, and axles to the vehicle and in proper alignment. Control arms have undergone many changes as a result of automotive design and manufacturing technology
Most modern control arms are designed to permit adjustments to the vertical alignment or camber of the vehicle's wheels. Camber can be negative, the top of the wheel is tilted in, or positive, the top of the wheel is tilted out. Proper adjustment of camber can be major concern in damage repairs, racing, and the lowering or lifting a vehicle from a stock position.
When one of these conditions arises, the issue is often addressed by installing adjustable control arms to correct the vehicle's camber. However, many of these solutions require the purchase of a particular control arm that addresses the specific, identified problem. This results in there being multiple replacement control arms, which can create supply and inventory problems.
SUMMARY
The disclosed control arm assembly has a control arm frame that mounts to a vehicle and includes an aperture that receives a ball joint assembly. The ball joint assembly has a carrier with a ball joint stud on one vertical axis and a housing with a dependent threaded shaft that is on a second vertical axis. The ball joint assembly is rotatable in the frame aperture for 360 degrees about the second vertical axis. The ball joint assembly is fixed in a desired position by tightening the assembly against the control arm frame.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of an adjustable control arm assembly with a ball joint assembly;
FIG. 2 is a perspective view of just the ball joint assembly;
FIG. 3 is an exploded view of the adjustable control arm assembly with a ball joint assembly in FIG. 1;
FIG. 4 is a top plan view of the adjustable control arm assembly with a ball joint assembly in FIG. 1;
FIG. 5 is bottom plan view of the adjustable control arm assembly with a ball joint assembly in FIG. 1;
FIG. 6 is a left-side elevation of the adjustable control arm assembly with a ball joint assembly in FIG. 1;
FIG. 7 is a right-side elevation of the adjustable control arm assembly with a ball joint assembly in FIG. 1;
FIG. 8 is a front elevation of the adjustable control arm assembly with a ball joint assembly in FIG. 1;
FIG. 9 is a rear elevation of the adjustable control arm assembly with a ball joint assembly in FIG. 1;
FIG. 10 is a section along the line 10-10 in FIG. 4; and,
FIGS. 11 through 14 illustrate various positions achievable by rotation of the ball joint assembly within the control arm.
DETAILED DESCRIPTION
The control arm assembly will be described in more detail with reference to the drawing figures wherein the same numeral identifies the same or similar element throughout.
With reference to FIG. 1, the control arm assembly 10 has a frame member 12, which is illustrated in a general sense with the understanding that the frame member 12 will be configured to the particular vehicle. The free ends 14 and 16 of the fame 12 will have bearing 18 for mounting the control arm 10 to the particular vehicle. The fame 12 will have an aperture, see FIG. 3, for locating a ball joint assembly 20.
With reference to FIG. 2, The ball joint assembly includes a ball and stud 22, a ball cup 24, an extended base 26 to the ball cup 24, a first washer 26, a mount 30 for insertion in the frame aperture, a threaded stud 32, a second washer 34, and a fastener 36.
With reference to FIGS. 3, 4, and 10, it can be seen that the mount 30 depends from the cup base 26. The mount 30 has a diameter that is selected to be less than the diameter of the aperture 18 so that the base 30 fits within the diameter of the aperture 18 and be rotatable. The washer 28 has an inner diameter that fits around the mount 30 and an outer diameter that abuts the extended base 26 to the ball cup 24. When the mount 30 is inserted in the aperture 18, the stud 32 extends beyond the frame 12 to receive a second washer 24 and the fastener.
FIGS. 10 through 14 illustrate rotation of the ball and stud 22 with respect to the aperture 18 in the frame 12. As illustrated in FIG. 10, the ball and stud 22 are centered about the center line 40 and the mount 30 is centered about the centerline 42, which is a common centerline with the aperture 18 in frame 12. As illustrated in FIG. 11 through 14, the position of the ball and stud 30 can be varied until the desired location is achieved and locked in place by tightening the fastener 36. The position of the ball and stud 22 can be varied through 360 degrees by rotating the mount 30 about the centerline 42 within the aperture 18 and it is not limited to the positions illustrated in FIGS. 11 through 14. Once the ball and stud 22 are located in the desired position for connection to an associated frame member, the fastener 36 is tightened to fit the ball joint assembly in position. As illustrated, the washer 28 and 34 have irregular surfaces, such as redial grooves, that enhance their grip with the extended base 26 and frame 12 when the fastener 36 is tightened to fix the position of ball and stud 22.
Patent Application
20250135820
