DE202005005598U1 - Jacking unit for especially motor vehicles has pump unit with drive motor in rotational communication with swashplate connected to pump push rod - Google Patents

Abstract

The jacking unit for the lifting of loads has a piston and cylinder unit, a pump unit, and a hydraulic reservoir for hydraulic medium. The pump unit has a drive motor which is in rotational communication with a swashplate (8) which is connected to a pump push rod (9) which via a suction valve (10) is connected to the hydraulic reservoir (12) and a via a pressure valve (13) is connected to the piston and cylinder unit (14-17). The shaft (7) of the swashplate is located close to and axially parallel to the drive shaft (4) of the motor.

Description

The The invention relates to a lifting unit for lifting loads with a Piston-cylinder unit, a pumping device and a hydraulic reservoir for hydraulic medium.

lifting units for lifting and holding loads are in a variety of configurations known. For example, there are lifting units in the form of jacks, in the context of standard equipment of a motor vehicle usually are formed purely mechanically. These mechanical jacks need a considerable space requirement, have a considerable weight and are not very comfortable to handle.

Known are also hydraulic jack, which are used for example in workshops, However, such jacks are very expensive and because of their Size to carry in not suitable for a motor vehicle.

task The invention is to provide a lifting unit that is easy in Handling and extremely compact is trained.

These Task is with a lifting unit of the type described according to the invention thereby solved, in that the pump device has a drive motor which is provided with a Swashplate is in rotary connection, wherein the swash plate with at least connected to a pump tappet is which over a suction valve with the hydraulic reservoir and a pressure valve with the piston-cylinder unit is connected.

A Such lifting unit can be extremely compact be formed because the manner of a swash plate pump trained pumping device does not require much space. The Handling the lifting unit is extremely easy since only the drive motor must be operated, the pump drives, the user himself must, unlike for example mechanical jacks, do not work with their own muscle power, which is a big one Ease of use offers.

In preferred embodiment, it is provided that the shaft of the swash plate adjacent, arranged axially parallel to the drive shaft of the drive motor is, whereby the lifting unit are made very compact can. The drive motor is then directly adjacent to the swash plate arranged.

Preferably is provided that the wave of the swash plate over a Reduction gear connected to the drive shaft of the drive motor is.

Of the Drive motor is preferably a DC motor, this can if desired operated by a remote control so that the lifting unit, after being under the lift Object has been positioned, conveniently operated remotely at the touch of a button can.

In Another advantageous embodiment is provided that the cylinder chamber the piston-cylinder unit connected to a pressure relief valve is. This ensures that damage to the lifting unit, in particular on the drive motor, be avoided when the piston-cylinder unit itself is already in its maximum Ausfahrlage or by a disorder too high a pressure arises.

Around With a compact design, you can also realize high lifting heights to be able to is provided in a further advantageous embodiment that the Piston cylinder unit has a plurality of telescopic elements. additionally or alternatively, for example, be provided that the Piston-cylinder unit can be equipped on the free end with a rigid rod, for example, if the lifting unit is in the DIY area, e.g. to support from door or door Lintels, is used.

Further can be advantageously provided that the piston-cylinder unit Freiendseitig with lifting tines or the like.

connected is, the lifting unit can then e.g. for easy lifting of furniture or are used.

Especially it is preferably provided that the lifting unit designed as a jack is. Such a jack is extremely compact, in practice can be For example, such a jack with a diameter of about 11 cm and a height of 18 cm, i. e. This jack can be in a motor vehicle stow away easily and can even in a larger (hand) pocket or the like. be transported by the user.

The The invention is explained in more detail below with reference to the drawing by way of example. These shows in:

1 a section through a lifting unit according to the invention and

2 a partial section of the lifting unit in another cutting plane.

A lifting unit in the form of a jack is in the drawing generally with 1 designated. This jack 1 has a housing 2 on, in the lower part of a DC motor 3 is included, which is a drive shaft 4 with a pinion 5 having. This pinion 5 makes with a gear 6 a reduction gear, which is on a shaft 7 is arranged, which is a swash plate 8th wearing. Here is the swash plate 8th with her wave 7 directly adjacent to the DC motor 3 and arranged axially parallel, resulting in a very compact arrangement can be seen. The swash plate 8th is thus on the reduction gear 6, 7 from the DC motor 3 driven.

The swash plate 8th is upper side with at least one, preferably two, pump tappets 9 connected so that the pump plunger 9 within a ram space 10 upon rotation of the swash plate 8th move up and down linearly.

The plunger rooms 10 are via a suction valve 11 hydraulically with a hydraulic reservoir 12 connected, with downward movement of the pump tappets 9 in the sense of the 1 opens the suction valve 11 and hydraulic fluid is removed from the hydraulic reservoir 12 in the ram-room 10 sucked.

The respective ram space 10 is beyond a pressure valve 13 with a piston-cylinder unit in connection, which in the embodiment an outer cylinder tube 14 and three telescopically arranged tubular pistons 15 . 16 . 17 having.

Moves the respective pump plunger 9 in the tappet room 10 due to the rotation of the swash plate 8th upward, the hydraulic medium is closed with the suction valve 11 and by the in the ram space 10 resulting pressure open pressure valve 13 in the cylinder space of the outer cylinder tube 14 pumped, this pumping process is repeated depending on the number of pump tappets 10 with each revolution of the swash plate 8th if necessary several times, so that gradually the pistons 15 . 16 . 17 the piston-cylinder unit are extended upward.

Since the illustrated lifting unit as a jack 1 is formed, is the inner piston 17 the piston-cylinder unit, for example via a in the piston 17 screwed spindle 18 with a top or outside attachment 19 provided, which serves as a bearing surface on the underside of the vehicle to be lifted, this essay 19 is preferably with a rubber insert 20 or the like. provided.

For filling the hydraulic reservoir 12 is in the case 2 a filling opening with a screw plug 21 intended.

To lower the piston-cylinder unit is the pressure chamber or the cylinder chamber thereof via a channel with a drain plug 22 with ball 23 in conjunction with this drain plug 22 outside of the housing via a plug flange 24 accessible or operable. When opening the channel 25 by appropriate release by the ball 23 Then hydraulic fluid from the pressure or cylinder space of the piston-cylinder unit passes through a channel 26 back to the hydraulic reservoir 12 and the piston-cylinder unit lowers.

To avoid that during the stroke movement in case of an overload of the DC motor 3 or other components of the jack 1 damaged, the pressure chamber of the piston-cylinder unit is above a hole 27 with a ball element 28 a pressure relief valve in communication, which is a compression spring 29 having its bias via a threaded pin 30 is adjustable. At a corresponding limit or positive pressure in the cylinder chamber of the piston-cylinder unit opens the ball 28 and hydraulic medium can escape and back into the hydraulic reservoir 12 get to the ball 28 closes again.

Recognizable is an extremely compact jack 1 available, the housing 2 has, for example, a diameter of about 11 cm and a height of about 18 cm.

The housing 2 of the jack 1 is preferably ergonomically designed, it has on the outside handling trays 31 and an upper chamfer 32 on.

The embodiment shows an embodiment of the lifting unit as a jack 1 , When using a differently shaped piston-cylinder unit, however, the lifting unit can also be used in other ways, for example, only a single piston can be used, which is connected to a rigid lifting rod or, for example, with lifting prongs to lift objects and the like. More.

Claims (8)

Lifting unit for lifting loads with a piston cylinder, a pumping device and a hydraulic reservoir for hydraulic medium, characterized in that the pumping device comprises a drive motor ( 3 ), which with a swash plate ( 8th ) is in rotary connection, wherein the swash plate ( 8th ) with at least one pump tappet ( 9 ), which via a suction valve ( 10 ) with the hydraulic reservoir ( 12 ) and a pressure valve ( 13 ) with the piston-cylinder unit ( 14 . 15 . 16 . 17 ) connected is. Lifting unit according to claim 1, characterized in that the shaft ( 7 ) of the swash plate ( 8th ) adjacent, axially parallel to the drive shaft ( 4 ) of the drive motor ( 3 ) is arranged. Lifting unit according to claim 2, characterized in that the shaft ( 7 ) of the swash plate ( 8th ) via a reduction gear ( 5 . 6 ) with the drive shaft ( 4 ) of the drive motor ( 3 ) connected is. Lifting unit according to claim 1, 2 or 3, characterized in that the drive motor is a DC motor ( 3 ). Lifting unit according to one or more of claims 1 to 4, characterized in that the cylinder space of the piston-cylinder unit ( 14 . 15 . 16 . 17 ) with a pressure relief valve ( 28 . 29 ) connected is. Lifting unit according to one or more of claims 1 to 5, characterized in that the piston-cylinder unit a plurality of telescopic elements ( 15 . 16 . 17 ) having. Lifting unit according to one or more of claims 1 to 6, characterized in that the piston-cylinder unit freiendseitig connected with lifting tines or the like. Lifting unit according to one or more of claims 1 to 6, characterized in that it serves as a jack ( 1 ) is trained.