1. Field of Invention
The present invention relates to rubber bushings and, more particularly, to a universal tool for extracting rubber bushings of different sizes.
2. Related Prior Art
A typical rubber bushing includes an internal ring rotationally located in an external ring. A tool is used to locate the internal ring in the external ring or remove the internal ring from the external ring.
The tool includes a threaded bolt, a first ring and a second ring. Each of the first and second rings includes a screw aperture for receiving the threaded bolt. In use, the threaded bolt is inserted through the internal ring of the rubber bushing. The first and second rings are engaged with the threaded bolt, with the rubber bushing located between the first and second rings. The first and second rings are rotated around and moved along the threaded bolt in different directions so that the first ring abuts the internal ring and that the second ring abuts the external ring. The rotation and movement of the first and second rings on the threaded bolt is continued so that the first and second rings move the internal and external rings in opposite directions to remove the internal ring from the external ring.
However, rubber bushings of different sizes are used in different positions of a vehicle for example. Rubber bushings of different sizes include internal rings of different sizes and external rings of different sizes. Therefore, the tool must include first rings of different sizes and second rings of different sizes. The first rings and the second rings are heavy and bulky. Hence, it is difficult to carry the tool including all of the first rings and the second rings. Moreover, the first rings and the second rings are expensive. Therefore, the cost of the tool including all of the first rings and the second rings is high.
The present invention is therefore intended to obviate or at least alleviate the problems encountered in prior art.
It is the objective of the present invention to provide a universal tool for extracting rubber bushings of different sizes.
To achieve the foregoing objective, the universal tool includes a threaded rod and two pushing units. Each of the pushing units includes a nut, a mount, a bearing and two pushers. The nut is engaged with the threaded rod. The mount includes at least two slots defined therein. The bearing bears the mount on the nut. Each of the pushers is movably located in a related one of the slots. The pushers of one of the pushing units push an internal ring of a rubber bushing and the pushers of the other pushing unit push an external ring of the rubber bushing.
Other objectives, advantages and features of the present invention will be apparent from the following description referring to the attached drawings.
The present invention will be described via detailed illustration of the preferred embodiment referring to the drawings wherein:
Referring to
Referring to
The mount 23 includes a ring 231 and a pusher support 232. The ring 231 includes an aperture 233 centrally defined therein.
The bearing 22 is located on the circular section 212 of the nut 21 and located in the aperture 233 of the ring 231. Thus, the bearing 22 is located between the nut 21 and the ring 231 so that the nut 21 can be rotated while the ring 231 is not. A portion of the bearing 22 is located against the annular rib of the nut 21.
The pusher support 232 includes an aperture centrally defined therein and three slots 234 defined therein in a radial manner. The slots 234 are evenly located in the pusher support 232. That is, each of the slots 234 is 180 degrees from another slot 234.
Each of the pushers 24 includes teeth 241 formed at an end thereof and a slide 242 formed at an opposite end thereof. Each of the slides 242 is movably located in a related one of the slots 234. A screw 243 is driven in each of the slides 242. Thus, each of the slides 242 is retained movable in the related slot 243.
Screws 235 are driven in screw apertures defined in the pusher support 232 through apertures defined in the ring 231. Thus, the pusher support 232 is retained connected to the ring 231.
Each of the positioning elements 25, regardless of the size, includes an aperture centrally defined therein and three slots 251 defined therein. Each of the pushers 24 is inserted through a related one of the slots 251. Thus, the pushers 24 are positioned by a selected one of the positioning elements 25.
Referring to
The mount 33 includes a ring 331 and a pusher support 332. The ring 331 includes an aperture 333 centrally defined therein.
The bearing 32 is located on the circular section 312 of the nut 31 and located in the aperture 333 of the ring 331. Thus, the bearing 32 is located between the nut 31 and the ring 331 so that the nut 31 can be rotated while the ring 331 is not. A portion of the bearing 32 is located against the annular rib of the nut 31.
The pusher support 332 includes an aperture centrally defined therein and three slots 334 defined therein in a radial manner. The slots 334 are evenly located in the pusher support 332. That is, each of the slots 334 is 180 degrees from another slot 334.
Each of the pushers 34 includes teeth 341 formed at an end thereof and a slide 342 formed at an opposite end thereof. Each of the slides 342 is movably located in a related one of the slots 334. A screw 343 is driven in each of the slides 342. Thus, each of the slides 342 is retained movable in the related slot 343.
Screws 335 are driven in screw apertures defined in the mount 332 through apertures defined in the ring 331. Thus, the mount 332 is retained connected to the ring 331.
Each of the positioning elements 35, regardless of the size, includes an aperture centrally defined therein and three slots 351 defined therein. Each of the pushers 34 is inserted through a related one of the slots 351. Thus, the pushers 34 are positioned by a selected one of the positioning elements 35.
Referring to
Referring to
Referring to
A proper one of the positioning elements 25 is selected so that the diameter of a circle defined by the slots 251 is smaller but close to the external diameter of the internal ring 99. Thus, the selected element 25 retains the pushers 24 in a proper position so that the pushers 24 can effectively push the internal ring 99. A proper one of the positioning elements 35 is selected so that the diameter of a circle defined by the slots 351 is larger but close to the external diameter of the external ring 98. Thus, the selected positioning element 35 retains the pushers 24 in a proper position so that the pushers 34 can effectively push the external ring 98.
Advantageously, the universal tool 100 is light and compact for including the positioning elements 25 and 35 that are light and thin. Moreover, the universal tool 100 is inexpensive for including the positioning elements 25 and 35 that inexpensive.
The present invention has been described via the detailed illustration of the preferred embodiment. Those skilled in the art can derive variations from the preferred embodiment without departing from the scope of the present invention. Therefore, the preferred embodiment shall not limit the scope of the present invention defined in the claims.
Number | Name | Date | Kind |
---|---|---|---|
3216098 | Ratz | Nov 1965 | A |
4492014 | Alexander | Jan 1985 | A |
4864709 | Klucz et al. | Sep 1989 | A |
6389668 | Hwang | May 2002 | B1 |
7770277 | Wridt | Aug 2010 | B2 |
7918003 | Acciardo, Jr. | Apr 2011 | B2 |
8042244 | Lai | Oct 2011 | B2 |
20080313888 | Mueller | Dec 2008 | A1 |
20120151728 | Shen | Jun 2012 | A1 |
Number | Date | Country | |
---|---|---|---|
20110302754 A1 | Dec 2011 | US |