Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1982-09-23
1985-01-01
Rosenbaum, Mark
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29227, 2940208, 294265, 254 105, 280668, B23P 1904
Patent
active
044908970
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a method for replacing front suspension components in a vehicle and a device to perform the method.
When there is damage to a front suspension traverse of a vehicle, the single front suspension components are taken from the damaged traverse and mounted on an intact front suspension traverse. Especially the spiral spring of the vehicle causes problems during such a dismantling as this spring has to be compressed before dismantling and be retained compressed when the components of the front suspension are moved to the intact front suspension traverse and mounted thereto.
SUMMARY OF THE INVENTION
The practical difficulties connected with the dismantling and fitting of those components to front suspension traverses, are overcome by the method and device according to the invention. Hereby a compression of the spring is effectuated in a safe manner by locking the spring and the dismantling and mounting respectively to the front suspension traverses are performed in a safe and accurate manner.
With the method according to the invention a damaged and an intact front suspension traverse are placed in parallel on a front suspension work bench, whereafter a mounting plate of a lifting arm is secured to the wheel hub of the damaged traverse, and a hydraulic or pneumatic cylinder is activated to lift the mounting plate of the lifting arm to force the wheel hub against the spiral spring of the traverse and to compress this, whereafter the spring is locked in a compressed condition, thereafter the front suspension components with the spring and the hub are dismantled from the traverse, the cylinder thereafter being deactuated, and the lifting arm with the components is moved to the intact front suspension traverse whereafter the components are mounted to the intact traverse and the locking of the spring is released.
The device according to the invention comprises a lifting arm protruding from each side of the front suspension working bench, being displaceably secured to a longitudinal shaft of the bench and comprising a lower arm and an upper arm being which are pivoted to each other. The upper arm is capable of turning out from and in towards the bench for fitting to different front suspension traverses, and the upper arm has a mounting plate which is adjustable in the hight for mounting to a wheel hub belonging to a front suspension traverse mounted in the bench. A hydraulic or pneumatic cylinder is provided in the bench, which upon activation is pressed against the lifting arm so that the mounting plate is lifted and compresses the spring of the front suspension components so much that dismantling and succesive mounting is simplified.
The subject matter of the invention provides a significant time reduction compared to known embodiments, such as disclosed in U.S. Pat. No. 3,067,500. The most wide spread method of today is based on the principles of this patent. Compared with the mentioned known device, the subject matter according to the present invention has the advantage of arranging the bench underneath the car, as the bench runs on wheels, the car thereby may be arranged on a double shafted lift in such a way that the complete front suspension may be dropped from the car directly in place on the front suspension bench and after the springs have been secured it may be transferred to another working place. Corresponding by the mounting after the repair is performed in the same way, without the need for physical strength which up until now very often has required two men's work.
As the front suspension bench may be moved a more convenient working position, there is accomplished what is looked upon as a considerable improvement. Additionally the hydraulic lifting arms perform the heaviest work.
BRIEF DESCRIPTION OF THE DRAWINGS
The device according to the invention is disclosed in the drawings, where FIG. 1 discloses a perspective view from the front of the front suspension bench with one intact and one damaged front suspension traverse mounted, and FIG. 2 d
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Rosenbaum Mark
Wallace Ronald S.
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