This disclosure relates to mechanical automotive service tools, and specifically universal ball joint press tools.
Ball joints are spherical bearings that typically connect control arms to steering knuckles allowing wheels to pivot relative the suspension of an automobile. They are today almost universally used in the front suspension, having replaced the kingpin/linkpin or kingpin/trunnion arrangement, but can also be found in the rear suspension of some higher-performance vehicles.
Many modern manufactured automobiles use MacPherson strut suspension, which utilizes one ball joint per side located between the lower end of the strut and the control arm. In non-MacPherson strut automobile suspension, there are typically two ball joints per side, one generally referred to as the upper ball joint and the other generally referred to as the lower ball joint. Ball joints may wear out due to fore and aft loads, primarily due to braking, lateral cornering loads, or, depending on the suspension design, vertical loads from the suspension spring. In any event, ball joints may wear out and require service.
In simplest form, a ball joint typically consists of a bearing stud having a ball substantially disposed in a socket defined by a casing; typically these parts are made of steel. One end of the bearing stud, opposite the ball, is usually tapered and threaded into a tapered receiving hole in the steering knuckle. The casing is typically connected to a control arm of the steering system, although the ball joint may be inverted with the casing connected to the knuckle and the bearing stud connected to the control arm. A protective rubber-like boot is sometimes disposed around at least a portion of the ball and socket to prevent dirt from getting into the joint assembly. The rubber-like boot may also be used to help retain lubrication within the socket. The opening of the socket may have an inner-diameter substantially similar in size, yet slightly smaller, than the outer diameter of the ball. This creates a press-fit for the ball to pop into the socket, although other retaining mechanisms may be used. To service the ball joint, it may be desirable to separate the ball from the socket, and in this scenario a ball joint press tool may be utilized to pop the ball back out of the socket.
Current universal ball joint press tools utilize adapters to fit many different sizes and shapes of ball joints. An example of this is the OTC 6559 Ball Joint Master Service Kit. These universal ball joint press tools require the adapters to be stacked requiring one hand to hold at least one of the adapters and another hand to hold the press tool. This then can cause some difficulty when yet another hand is needed to actuate a screw to manually operate the press aspect of the tool. Therefore it would be advantageous to have a universal press tool having removably coupleable (and thusly decoupleable and exchangeable) adaptors that may be used with a single hand while positioning the tool.
One aspect of this disclosure is directed to a ball joint press tool with releasably coupleable adapters utilizing spring plungers. In this aspect, the tool has a frame which defines an adapter-receiving aperture and a press-assembly aperture. In this aspect, both the adapter-receiving aperture and the press-assembly aperture have centroids, or center points of each opening, and the centroids (a first and second centroid, respectively) define a press axis. Also in this aspect, the frame defines a spring-plunger aperture. The spring-plunger aperture has an intersecting-end which intersects a portion of the adapter-receiving aperture.
In this same aspect, a spring-plunger is disposed in the spring-plunger aperture. The spring-plunger is made up of at least a spring adjacent to an adapter-engagement head. The spring is disposed in the spring-plunger aperture and the adapter-engagement head is at least partially disposed within the spring-plunger aperture and at least partially extendable into the adapter-receiving aperture.
In this aspect, a portion of a press assembly is disposed in and extends through the press-assembly aperture. The press assembly is configured to actuate substantially along the press axis toward and away from the adapter-receiving aperture. The press assembly may be a screw, but other linear actuation mechanisms may be used.
In this aspect, an adapter is utilized that has connecting projection which may be partially disposed within the adapter-receiving aperture. The connecting projection has a spring-plunger engaging detent, or detent. As said, the connecting projection is designed to be at least partially disposable within the adapter-receiving aperture, and when it is, the adapter-engagement head of the spring-plunger can become at least partially engaged with the spring-plunger engaging detent. This engagement helps to couple the adapter, while at the same time allows the adapter to be de-coupled with enough force to overcome a threshold is applied.
With this aspect, there may be multiple spring-plunger apertures, each having an intersecting-end intersecting a portion of the adapter-receiving aperture. Thusly, there may be multiple spring plungers in the spring-plunger apertures, and they may be regularly spaced around a perimeter-wall of the adapter-receiving aperture. This regular spacing can provide more stability of the adapter before a press occurs. The frame may also have an adapter shelf disposed adjacent to the adapter-receiving aperture. This adapter shelf may be orthogonal to the press axis, and the adapter may ‘sit’ on the adapter shelf when the ball joint press tool is used to press a ball joint
Additionally in this aspect, there may also be a second adapter-receiving aperture as part of the press assembly. The second adapter-receiving aperture may be defined by an adapter-receiving segment of the press assembly that is disposed substantially along the press axis between the first adapter-receiving aperture and the press-assembly aperture. When there is a second adapter-receiving aperture on the press assembly, it faces the first adapter-receiving aperture.
Accordingly, if there is a second adapter-receiving aperture, then there may also be a second spring-plunger as part of the adapter-receiving segment of similar configurations to that described above. And similarly to that described above, there may be a number of second spring-plunger apertures, each having a second intersecting-end of each of the second spring-plunger apertures intersecting a portion of the second adapter-receiving aperture.
Another aspect of this disclosure is directed to a ball joint press tool having a C-shaped frame with a first and second end. In this aspect, the first end defines a first adapter-receiving aperture, and the second end defines a press-assembly aperture. The center points of these two apertures define a press axis for the tool. The C-shaped frame further defines a first spring-plunger aperture having a first intersecting-end intersecting a portion of the first adapter-receiving aperture. In this aspect, a first spring-plunger is disposed in the first spring-plunger aperture, the first spring-plunger having a first spring and a first ball. The first ball is spring biased by the first spring to extend at least partially into the first adapter-receiving aperture.
In this aspect, a press assembly is disposed in and extends through the press-assembly aperture having an adapter-receiving segment between the first adapter-receiving aperture and the press-assembly aperture. The adapter-receiving segment defines a second adapter-receiving aperture, an intersecting second spring-plunger aperture, and a second spring-plunger disposed in the second spring-plunger aperture, similar to the firsts. Accordingly, a second ball is spring biased to extend into the second adapter-receiving aperture.
In this aspect, there are also two adapters; a first adapter and a second adapter. Each adapter has a respective first and second connecting projection defining first and second spring-plunger engaging detents. The first and second connecting projections are insertable within the first and second adapter-receiving apertures, and when this occurs, the first and second balls engage with the adapters to releasably couple them to the ball joint press tool during use.
The above aspects of this disclosure and other aspects will be explained in greater detail below with reference to the attached drawings.
The illustrated embodiments are disclosed with reference to the drawings. However, it is to be understood that the disclosed embodiments are intended to be merely examples that may be embodied in various and alternative forms. The figures are not necessarily to scale and some features may be exaggerated or minimized to show details of particular components. The specific structural and functional details disclosed are not to be interpreted as limiting, but as a representative basis for teaching one skilled in the art how to practice the disclosed concepts.
Returning back to
The press assembly 14 is configured to actuate the adapter-receiving segment 40 toward and away from the adapter-receiving aperture 24 on the first end 20 of the frame 12. The frame 12 shall be configured to support actuation of the adapter-receiving segment 40 toward the adapter-receiving aperture 24 substantially along the press axis 36 (see
In this embodiment, the outer tube 46 is secured within the press-assembly aperture 26, which may be accomplished by press fit, a weld bead, adhesive, a securing screw (not shown), or other known fixing methods. In an alternate embodiment, the second end of the frame defines threads along a portion of a wall of the press-assembly aperture 26, and the threaded shaft 50 engages directly with the frame 12. The adapter-receiving segment 40 may be a unitary part of the threaded shaft 50 or may be separate from the threaded shaft 50 and permanently or releasably connectable thereto. The distal end 52 may be a hexagon design configured to accept a wrench.
The releasable coupling of the adapters 16, 18 is provided by first and second spring-plungers 70, 72 interacting with the adapters 16, 18, respectively. Frame 12 defines a first spring-plunger aperture 74 having a first intersecting-end 76 intersecting a portion of the first adapter-receiving aperture 24 (see also
The adapter-receiving segment 40 of the press assembly 14 defines a second spring-plunger aperture 78 having a second intersecting-end 80 intersecting a portion of the second adapter-receiving aperture 44 (see
Referring now to
Referring to now to
Referring to both
The second spring-plunger 72 has a second housing 108, which may be threaded, a second spring 110, and a second adapter-engagement head 112. The second adapter-engagement head 112 may be a ball 112, a pin-head 112, or any other known spring-plunger engagement mechanism. The second spring 110 is disposed within the second spring-plunger aperture 78. The second adapter-engagement head 112 is at least partially disposed within the second spring-plunger aperture 78 and spring biased by the second spring 110 to extend at least partially into the second adapter-receiving aperture 44.
Referring now to
The first spring-plunger aperture 74 may be a number of first spring plunger apertures 74, each having a first intersecting-end 76 intersecting the first inner-diameter perimeter wall 86. Accordingly, a number of first spring-plungers 70 may be partially disposed in the number of first spring plunger apertures 74. The number of first spring-plunger apertures 74 may be regularly spaced around the inner-diameter perimeter wall 86 of the first adapter-receiving aperture 24. In
In
Although adapter 18 is not shown at least partially disposed in the second adapter-receiving aperture 44 in
To aid in the stability of an adapter 16, 18, an adapter shelf 120, 122 may be utilized. The adapter shelf 120 is defined by the first end 20 of the frame 12 and is adjacent to the first adapter-receiving aperture 24 on a first adapter entry side 124 of the first adapter-receiving aperture 24. The adapter shelf 120 is defined by the adapter-receiving segment 40 of the press assembly 14 and is adjacent to the second adapter-receiving aperture 44 on a second adapter entry side 126 of the second adapter-receiving aperture 44. Adapter shelves 120, 122 are substantially orthogonal to the press axis 36 (see
Spring-plungers 70, 72 engaging in spring-plunger detents 62, 66 are an advantage over previous designs allowing for adapters 16, 18 to be coupled to the tool 10 so that holding the adapters in place while position the tool is unnecessary. Previous tools all have components that at some level can slide apart or fall out depending on the orientation of the tool. Additionally, providing female adapter-receiving apertures 24, 44 (along with adapter shelves 120, 122) and male connecting projections 60, 64 provides a more robust arrangement than previous designs. Furthermore, having a female receiving first adapter-receiving aperture 24 reduces the need for additional componentry to be fixed into the frame 12 to provide a male connecting surface. Combining this concept with a threaded press-assembly aperture 26 reduces componentry even further. However, having an outer tube 46 design can keep the threads cleaner in a very dirty and grimy environment.
While exemplary embodiments are described above, it is not intended that these embodiments describe all possible forms of the disclosed apparatus and method. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the disclosure as claimed. The features of various implementing embodiments may be combined to form further embodiments of the disclosed concepts.
Number | Name | Date | Kind |
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5857252 | Jansen | Jan 1999 | A |
7669305 | Lionberg | Mar 2010 | B1 |
7895723 | Wridt | Mar 2011 | B2 |
10744627 | Andrews | Aug 2020 | B2 |
Number | Date | Country | |
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20200346330 A1 | Nov 2020 | US |
Number | Date | Country | |
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62840729 | Apr 2019 | US |