US1802840A - Vehicle lifting jack - Google Patents

Description

April 28, l931- A. scHNExDER 1,802,840

VEHICLE LIFTING JACK Filed Nov. 27, 1928 2 SheetSSheetl ffy. 7 H92 l In 5 April 28, 1931- A. scHNElDl-:R 1,802,840

VEHICLE LIFTING JACK Filed Nov. 27, 1928 2 Sheets-Sheet 2 Patented Apr. 2s,- 1931.1

UNif-ED STAT-Es PATENT vOFFICll VEHICLE LIFTING' JACK Application filed November 27, 1928, Serial No. 322,280, and in Germany February 18, 1928.

The application relates to vehicle jacks for self-propelled vehicles, fixed to parts of the frame, for example to the axles, by means of brackets, and working in tubular casings. With these vehicle jacks the disadvantage has been experienced, that by reasonof the dif' ferent heights of the axles mechanical operation by the car engine was in many cases impracticable, and for each type of vehicle axle o a ack of different design was required. My

invention remedies this disadvantage in a simple manner the gear housing of the jack being made of two separate casings capable of independent fitting. `The spindle of the '15 jack proper is driven .by a worm wheel and worm, the worm being 'disposed on a shaft which is connected by a bevel wheel connecting gear to the driving axleofthe gear extending in the longitudinal direction.

If the spindle is rigidly connected to the tubular member, the distortion which occurs in use is liable to produce fracture or binding.

To remove or reduce this risk I. conn-ect the spindle to the tubular member in such a man- '25 ner that it is capable of limited rotation in relation thereto. I may make the connection by means of a Cardan joint.

An example of apparatus according to the invention is illustrated on the accompanying so drawings.

Fig. 1 shows a side view, partly in section through the gear of the jack, adapted to an axle of thelowest height normally encountered in-pyactice. p

Fig. 2 is a similar view showing the apparatus adapted for higher axles.

Fig. 3 is a plan view of Figs. 1 and 2, and

Fig. 4 a view showing the arrangement for very low axles.

Fig. 'shows the gearing for the rear wheel, with the axle very high above the worm shaft, and

Fig. 6 shows the gearing applied to laterally inclined axles.

Fig. 7 is a side view in section 'of the lifting ]ack.

Fig. 8 is a plan view.

The movable tube 1 of the jack is screwed out of the fixed tubular casing 3 by means of the worm wheel 2.

The worm wheel2 keyed to the movable tube 1 but capable of sliding movement there-v on, by reason of its key 2' being in engagement with a longitudinal slot 3 formed on said tube is driven by the worm 4 mountedji on the worm shaft 5. The worm 4 and worm wheel 2 are disposed in the common casing 16. On the worm shaft 5 there is also disposed If the axle 14 is sufliciently high above the ground, the gearing may be arranged as illustrated in Figs. 1, 2 and 3 in a simple manner beneath the axle. Fig. 2 shows how with a higher axle 14 the vertical shaft 8 between the gear case 11 and the worm casing 6 is extended in a'simple manner, so that in this case the worm casing 6 may still be fixed to the lug 12. If the laxle 4 is too low to fix the device below it, the gearing can be arranged above the axle, as shown in Fig. 4 in accordance-with the subject ofthe present application. Then the driving shaft 10 and the casing 11 is disposed in a simple manner above the axle and it is connected from above'by means of its vertical shaft 8 with the worm casing 6. If none of these methods is possible, as for example in the case of the older type of vehicles having bent axles, the casing 11 is turned in a. simple manner through 90o and the shaft of one wheel of thepair of bevel wheels 9, which previously formed the vertical shaft 8, is dispensed with, i. e. it also forms the shaft 5 for the worm 4. If the device is to be fitted to the rear axle of the vehicle, then as the rear axle is alwa s considerably hi her as it is not bent, the tubular casing 3 is xed to the round axle casing V threaded.

drive transmission casing 11 from the gear case 6 it is possible to use the same construction for all types of vehicles.

The jack is connected by brackets 16 and 17 to each of the car springs 18, the said brackets supporting a fixed vertical tube or tubular'casing 3, in which there is a movable tube 1, whose upper part 19 -is'internally screw The tube 1 is rotated by means of a worm wheel 2 driven by the engine, this wheel being engaged with the tube by means of a spline, so that the tube can move vertically. Within the tube 1 there is ascrew spindle 20 engaged with the part 19.\ The head 21 of the spindle is pivoted by means ofa pin 22 to a shackle 23, which has at the top a boss 24 pivoted by a. pin 25 to a collar 26 seated upon a shoulder in the tube 3 and 3. -The shackle forms aCardan joint allowing of limited rocking movement of the spindle 20 withinthe ltube 3. The pin. 25 engages into the wall of the tube 3 to prevent rotation of the spindle about its axis.

The tube 1 has a foot 28 resting on the ground when the jack is in operation, the lift being imparted by screwing spindle upwards in the tube 1. The upward thrust of the spindle is taken in part bythe spindle 20 and in art by the cap 27.

The molbilitybf the spindle 20 within the tube 3 enables it tol accommodate itself to minor distortions, and this reduces the liability to fracture, enabling a comparatively Weak spindleto be used.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare thatwhat I claim is 1. A vehicle j ack comprising an louter casthreaded spindle, means pivotally suspending said spindle from and within the outer casing, an inner casing freely received within said outer casing and having threads in engagement with the screw threaded spindle, and means for rotating the inner casing causing the latter to move on the spindle and reciprocate within the outer casing.

4. A vehicle jack comprising anl outer casing vertically fixed to portions of a vehicle, a cap closing the upper end of the vertically fixed outer casing, a screw threaded spindle pivotally connectedv to said cap and non-rotatably suspended thereby from and within the outer casing, an inner casing freely received within said outer casing` and having threads in engagement with the screw threaded spindle, and means for rotating the inner casing causing the latter to move on the spindle and. reciprocate within the outer casing.

5. A vehicle 'ack comprising an outer casing vertically xed to portions of a vehicle, a cap closing the upper end of the vertically fixed. outer casing, a screw threaded spindle,

suspending lsaid screw threaded spindle from and within the outer casing and connecting said spindle to the cap, an inner casing freely received w1th1n sald outer casing and having threads in engagement withthe screw nature.

ALFONS SCHNEIDER.

ing fixed toportions of a vehicle, a non-rotatable screw threaded spindle suspended from and within said outer casing, an inner casing having threads in engagement with said screw threaded spindle and free to reciprocate within the outer casing, and means for rotating said inner casing causing the latter to reciprocate within the Outer casing on the non-rotatable spindle.

2. A vehicle jack comprising an outer casing fixed 'co-portions of a vehcile, a non-rotatable screw threaded spindle suspended from and within said outer casing, an inner casing having threads. in engagement with said screw threaded spindle and free to reciprocate within the outer casing, means for rotating the inner casing causing the latter to reciprocate within the outer casing on `the non-rotatable spindle, said means including a gear rotatable with the inner casing and having sliding engagement therewith, and driving gearings connecting said gear to the engine of the vehicle.

3. A vehicle jack comprising an outer casing fixed to portions of a vehicle,a screw

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