RU2765183C1 - Hydraulic lifting device with vertical lifting movement for cars and similar vehicles - Google Patents

Abstract

FIELD: lifting devices.

SUBSTANCE: invention relates to lifting devices for vehicles. The hydraulic lifting device (10) with vertical lifting motion contains two load-bearing platforms (11, 12) located parallel to each other, lifting means (13) made with the possibility of moving the load-bearing platforms (11, 12) in the vertical direction. The lifting means (13) contain, for each load-bearing platform (11, 12), one pair of opposite articulated levers (14, 15), each of which is located under the end part of the load-bearing platform (11, 12), supporting elements (16, 17) for attaching these articulated levers (14, 15) to the floor. In each pair of articulated levers (14, 15), the first articulated lever (14) contains: the first element (20), and the first element (20) is pivotally connected by the first end (21) to the corresponding support element (16), in its central part (22) is pivotally connected to the second element (23), and its opposite second end (24) is pivotally connected to the slider (25), which passes under the corresponding load-bearing platform (11, 12); the second element (23), with its first end 27 pivotally connected to the central part (22) of the specified element (20), and with its opposite second end (28) pivotally connected to the corresponding load-bearing platform (11, 12).

EFFECT: improvement of the lifting device is achieved.

8 cl, 16 dwg

Description

The field of technology to which the invention belongs

The invention relates to a hydraulic lift with vertical lifting movement for cars and similar vehicles.

State of the art

Hydraulic lifts, currently known and widely used in garages, are designed to lift a vehicle off the floor so that a technician can easily access the underside and underside of said vehicle.

Said known hydraulic lifts generally comprise two carrier platforms which extend longitudinally and are arranged parallel to each other, each of which is moved in the vertical direction by means of respective lifting means, said lifting means being fixed to the floor by means of respective support elements.

Said lifting means are usually a central scissors or a pantograph system.

Such a central lifting system, even if it is well known and recognized, has a significant limitation due to the fact that the hinge of the scissor system or the hinges of the pantograph system are located under the central area of the carrier platforms.

Said central position of the hinges of the central lifting systems does not allow the technician to pass under the central sections of the platforms or remain under them to perform any operation, which, as a result, leads to inconvenience and increases work time.

In order to overcome the above drawback, hydraulic lifts have been developed in which the lifting means for each longitudinal carrier platform consist of one pair of opposed articulated arms each located under one end of the longitudinal carrier platform.

Said articulated arms are of the type with two elements pivotally connected to each other by means of a central swivel joint.

Each articulated arm contains:

- the first bottom element, hinged at the first end to the corresponding support element, and at the opposite second end - to the second top element,

- the second top element, hinged by the first end to the second end of the first element, and by the opposite second end - to the corresponding longitudinal platform.

Each of said articulated arms is moved by respective hydraulic actuators, configured to rotate the two articulated arm elements relative to each other, thereby obtaining

- either spreading the articulated arms and, consequently, lifting the two longitudinal platforms in the vertical direction,

- either folding the articulated arms and consequently lowering the two longitudinal platforms to the floor in the same vertical direction.

This hydraulic jack lift system with side articulated arms frees up the central area under the longitudinal platforms, which benefits the operator who needs to walk or be under the platforms to perform work.

Solutions of the type discussed above are disclosed, for example, in patent documents WO 2007/148960 A1, US 6059263 A, CN 203255924 U, CN 103232009 A and WO 2013/062215 A1.

Said side-articulated hydraulic lifts, while solving the problem of space occupied in the central area under the platforms, have a significant disadvantage due to the fact that the platforms are supported only at their ends, so that when a vehicle is placed on them, they may be subjected to unwanted bend in the central region.

Disclosure of the essence of the invention

It is an object of the present invention to provide a vertical lifting hydraulic lifting device, in particular for automobiles and similar vehicles, which is capable of overcoming the above disadvantages and limitations of the prior art.

More specifically, one object of the invention is to provide a hydraulic lifting device in which the central part of the platforms is supported in a stable and safe manner, and in which, at the same time, there are no obstacles under these central parts of the platforms that can interfere with the passage of the operator.

Another object of the invention is to provide a hydraulic lifting device which is stable, safe and efficient in the same way as prior art hydraulic hoists.

The implementation of the task and objects described above is provided by a hydraulic lifting device with a vertical lifting movement, in particular for cars and similar vehicles, according to paragraph 1 of the claims.

Additional features of the hydraulic lifting device according to claim 1 are disclosed in the dependent claims.

Brief description of the drawings

The objective and the above objects, together with the advantages to be discussed below, are highlighted in the description of an embodiment of the invention, which is presented by a non-limiting example with reference to the accompanying drawings, in which:

- in Fig. 1 is a perspective view from above of a hydraulic lifting device according to the invention;

- in Fig. 2 is a perspective view from below of a hydraulic lifting device according to the invention;

- in Fig. 3 shows a side sectional view of a hydraulic lifting device according to the invention;

- in Fig. 4 is a front view of a hydraulic lifting device according to the invention;

- in Fig. 5 shows a fragment of a section of a longitudinal carrier platform of a hydraulic lifting device according to the invention;

- in Fig. 6 is a perspective view of a fragment of a hydraulic lifting device according to the invention;

- in Fig. 7 is a side view of the fragment shown in FIG. 6;

- in Fig. 8 is a plan view of the detail shown in FIG. 6;

- in Fig. 9 is a sectional view of FIG. 7 taken along the line IX-IX;

- in Fig. 10 is a sectional view of FIG. 7 along the line X-X;

- in Fig. 11 is a sectional view of FIG. 8 taken along the line XI-XI;

- in Fig. Fig. 12 is a side view of the fragment shown in Fig. 6 in the first use configuration;

- in Fig. 13 shows the same side view as in FIG. 12 with the same fragment in the second usage configuration;

- in Fig. 14 shows the same side view as in FIG. 12 with the same fragment in the third use configuration;

- in Fig. 15 shows a side sectional view of another fragment of the hydraulic lifting device according to the present invention.

- in Fig. 16 shows a fragment of FIG. 15.

Implementation of the invention

In the above drawings, the hydraulic lifting device with vertical lifting movement according to the invention is generally indicated by the reference position 10.

The specified hydraulic lifting device 10 with vertical lifting movement, in particular for cars and similar vehicles, is of the type containing:

- two carrier platforms 11 and 12, located parallel to each other,

- lifting means 13, made with the possibility of moving the carrier platforms 11 and 12 in the vertical direction; wherein said lifting means 13 comprise, for each carrier platform 11 and 12, one pair of opposing articulated arms 14 and 15, each of which is located under the end portion of the carrier platform 11 and 12,

- supporting elements 16 and 17 for fastening the hinged arms 14 and 15 to the floor (base).

A specific feature of the hydraulic lifting device 10 according to the invention, which is clearly visible in figure 3, is that in each pair of articulated arms 14 and 15, the first articulated arm 14 contains:

- the first element 20, and the specified first element 20 by the first end 21 is hinged to the corresponding support element 16, in its central part 22 is hinged to the second element 23, and its opposite second end 24 is hinged to the slider 25, which passes under the corresponding carrier platform 11 and 12 by means of 26 sliding,

- the second element 23, wherein said second element 23 is pivotally connected by its first end 27 to the central part 22 of the first element 20, and by its opposite second end 28 is pivotally connected to the corresponding carrier platform 11 or 12.

In each pair of articulated arms 14 and 15, the second articulated arm 15 comprises:

a first element 30, wherein said first element 30 is pivotally connected by its first end 31 to the corresponding support element 17 and its opposite second end 34 is pivotally connected to the second element 33,

- the second element 33, wherein said second element 33 is pivotally connected by its first end 37 to the second end 34 of the first element 30, and by its opposite second end 38 is pivotally connected to the corresponding carrier platform 11 or 12.

In one embodiment, not shown here for simplicity, both the first and second articulated arms for lifting a single carrier platform are similar to the first element 20, i.e., hinged at the first end 21 to the corresponding support element. 16 are hinged at their central part 22 to a second element 23 and at their opposite second end 24 are hinged to a slider 25 which passes under the respective carrier platform 11 and 12 via sliding means 26.

Of course, the lifting means 13 comprise hydraulic actuators 40 for driving the articulated arms 14 and 15.

Each of the two carrier platforms 11 and 12, such as the platform indicated by 11 in FIG. 3 comprises a plate 11a made of metallic material and extending generally in the longitudinal direction, which is reinforced from below by a plurality of longitudinal elements 11b and transverse elements 11c, alternating in such a way as to form a reinforcing frame.

Each of the support elements 16 and 17, which serve to fasten the articulated arms 14 and 15 to the floor (base), includes, for example, a metal plate suitable for fastening to the floor.

In addition, the support members 16 and 17 are connected by connecting rods 41, allowing faster, more accurate and more stable installation of the hydraulic lifting device 10.

In the embodiment of the invention disclosed herein as a non-limiting example of the invention itself, each of the elements 20, 23, 30, 33 of the first articulated arm 14 and the second articulated arm 15 contains two symmetrical rods, for example, 20a and 20b for the first element 20 and 23a and 23b for the second member 23 of the first pivot arm 14, as can be clearly seen in FIG. 4.

These two symmetrical rods 20a and 20b are connected by means of reinforcing intermediate elements 20c, shown as an example in FIG. 1 and FIG. 3.

Symmetric rods 23a and 23b of the second element 23 of the first articulated arm 14, as well as symmetric rods of the second element 33 of the second articulated arm 15 are connected by a bracket, respectively 23c and 33c.

Obviously, it is assumed that each of the elements 20, 23, 30, 33 can be formed by a single rigid part, or a group of parts connected to each other in such a way as to form a single rigid assembly, as disclosed in this example embodiment of the invention.

The first element 20 is pivotally connected by the first end 21 to the corresponding support element 16 by means of two lower coaxial pins 50.

Said first element 20 is pivotally connected in its central part 22 to the second element 23 by means of two central coaxial pins 51, one for each symmetrical rod.

The specified first element 20 is pivotally connected by the second end 24, opposite to the slider 25, with the slider 25 using a movable upper pin 52.

The second element 23 is pivotally connected by its opposite second end 28 to the carrier platform 11 or 12 using the upper fixed pin 53.

It is assumed that the first element 30 and the second element 33 of the second pivot arm 15 are to be pivotally connected to each other in the same manner.

It is assumed that the axes of rotation of the above pins should be parallel to each other and horizontal.

The first articulated arm 14 and the second articulated arm 15 expand and fold in such a way that the central coaxial pins 51 always remain under the carrier platforms 11 and 12.

The hydraulic lifting device 10 according to the invention makes it possible to provide a space in which one can stay and move, similar to the space provided in hydraulic lifts of the known type, under each carrier platform 11 and 12, when said carrier platforms 11 and 12 are raised in working configuration, and at the same time the same time allows to provide a reinforcing column, which in each carrier platform 11 and 12 is formed by the corresponding first lever 14.

When the carrier platforms 11 and 12 are in the raised configuration, the first arm 14 acts as a strut, transferring the forces concentrated in the central region of the carrier platforms 11 and 12 to the floor.

In this exemplary embodiment, the hydraulic actuators 40 comprise two paired hydraulic cylinders 40a and 40b for each articulated arm 14 and 15, each of said hydraulic cylinders being pivotally connected at one end to the first respective element 20 or 30 by means of an intermediate sleeve 40c, which is visible in fig. 4, and at the opposite end with the bracket 23c or 33c of the second corresponding element 23 or 33.

The slider 25, which passes under the respective carrier platform 11 and 12 on the sliding means 26, comprises two side slide blocks 60 and an upper movable pin 52, each end of which is defined by one of said side slide blocks 60, as can be clearly seen in FIG. 5.

The sliding means 26 comprises, as a non-limiting example of the invention, two opposite longitudinal guide sections 61 and 62, respectively, located under the plate 11a of each platform 11 and 12.

An important detail of the invention are the side sliding blocks 60.

Each side sliding block 60 includes means for adjusting its height H.

The side sliding block 60 is clearly visible in FIG. 6-11.

The side sliding block 60 comprises an upper part 63 and a lower part 64 which slide relative to each other in the direction determined by the height H.

An opening 65 is provided at the bottom 64 to receive one end of the movable top pin 52.

The lower part 64 is located between two vertical guide flanges 66 of the upper part 63.

The means for adjusting the height Η comprise one or more manipulation pins 67, for example two manipulation pins 67 located in two corresponding counter-threaded through holes 68 made in the lower part 64.

The manipulation pins 67 are oriented in such a way that the upper part 63 can be separated from the lower part 64 by screwing them.

More specifically, the manipulation pins 67 are positioned so as to act in a vertical direction with respect to the operating configuration of the hydraulic lifting device 10 according to the invention, i.e. in the same direction as determined by the height Η of the lift Η of the side sliding block 60 itself.

At the level of the through holes 68, between the upper part 63 and the lower part 64, corresponding stop plates 69 are located, while said stop plates protect the integrity of the upper part 63 from any contact with the corresponding manipulation pin 67.

Each side slide block 60 also includes stabilization means to stabilize the relative position of the upper part 63 and the lower part 64.

Said means of stabilizing the position consist of locking pins 70 adapted to be brought into contact with manipulation pins 67 and prevent their movement.

More specifically, in this exemplary embodiment, said locking pins 70 are inserted into respective transverse threaded holes 71 made in the lower part 64 and extending to the through holes 68 of the manipulation pins 67.

At the level of the outer entrances of the transverse threaded holes 71 on the stops 66 of the upper part 63 there are corresponding access openings 72, providing access to the locking pins 70 of the screwing tools.

In FIG. 12 shows the side slide block 60 in a configuration in which the bottom portion 64 does not protrude below the upper portion 63 and the side slide block 60 has a minimum height H1.

In FIG. 13 shows the side slide block 60 in an intermediate configuration.

In FIG. 14 shows the side slide block 60 in a configuration in which the lower part 64 protrudes from below the boundaries of the upper part 63 and the side slide block 60 has a maximum height H2.

The height H2 is determined by the distance between the upper surface 63a of the upper part 63 of the sliding block 60 and the lower surface 64b of the lower part 64.

The adjustable side slide blocks 60 optimize the lifting and lowering movements of the carrier platforms 11 and 12 by eliminating play between these side slide blocks and the guide sections 61 and 62 in which they are placed.

Thus, said side slide blocks 60 also contribute to the elimination of downward deflection of the carrier platform 11 or 12 with which they are associated.

The lifting means 13 also comprise, for each of the articulated arms 14 and 15, a safety lock 80 shown in FIG. 15 and 16, ensuring the stability of holding the carrier platforms 11 and 12 in the same plane, that is, holding the support platforms 11 and 12 at the same height and in a horizontal position; wherein said safety interlock 80 has the secondary function of mechanically preventing undesired lowering of platforms 11 and 12 in the event of a failure of the hydraulic actuators 40.

More specifically, in this exemplary embodiment of the invention, said safety interlock device 80 comprises

- a toothed rod 81 with sawtooth teeth 82, which is integral with at least one rod of the rods of the hydraulic cylinders 40a and 40b and is able to translate along with said at least one rod relative to the sleeve of this hydraulic cylinder 40a. and 40b,

- a movable insert 83, which prevents translational movement, controlled by the drive 84 and configured to take either a locked configuration in which it is located between two sawtooth teeth 82, or a released configuration, in which it is located behind the space between the sawtooth teeth 82.

The specified insert 83, preventing translational movement, for example, is pivotally connected to the pin 85 between the paired hydraulic cylinders 40a and 40b and is rotated by a linear actuator 86.

Said linear actuator 86 is, for example, hydraulic, or may be of a pneumatic or other similar and equivalent type.

The sliding insert 83 and the sawtooth teeth 82 are geometrically shaped to allow the toothed rod 81 to slide in the extension direction of the hydraulic cylinders 40a and 40b while preventing it in the opposite direction.

It is practically shown that the invention fulfills its task and achieves its goals.

More specifically, the invention provides a hydraulic lifting device which, by means of first arms directly connected between the floor and the central portions of the respective carrier platforms, makes it possible to compensate for the torsional action of the carrier platforms that occurs when a vehicle is placed on these carrier platforms with unbalanced loads that are greater on the right side. sides of each platform or more to the left of the ideal central loading position.

Thus, the invention provides a hydraulic lifting device in which the central part of the platforms is supported in a stable and safe manner, and at the same time there are no obstacles under these central parts of the platforms that impede the passage of the operator.

In addition to the above, the invention provides a hydraulic lifting device in which, thanks to height-adjustable side sliding blocks, the sliding system of the ends of the first arms, which are fixed under the respective platforms, ensures optimal movement and at the same time optimal transfer of loads from the platforms to the floor (base).

The invention, thus formulated, can be modified and create options that will all be covered by the inventive idea disclosed in this document; in addition, all parts can be replaced by other technically equivalent elements.

In practice, any components and any materials may be used, provided they are compatible with the intended use, and any shape and size may be chosen according to need and the state of the art.

If the features and methods mentioned in any of the claims are accompanied by reference characters, it should be understood that these reference characters are used only for the purpose of facilitating the understanding of the claims, therefore, these reference characters do not have any restrictive effect for the interpretation of any element, as an example, designated by these reference positions.

Claims (17)

1. Hydraulic lifting device (10) with vertical lifting movement, in particular for cars and similar vehicles, containing - two carrier platforms (11, 12) arranged parallel to each other; - lifting means (13) configured to move said carrier platforms (11, 12) in the vertical direction, wherein said lifting means (13) comprise, for each carrier platform (11, 12), one pair of opposite hinged arms (14, 15), each of which is located under the end part of the carrier platform (11, 12), - supporting elements (16, 17) for fastening said hinged arms (14, 15) to the floor; wherein in each pair of articulated arms (14, 15) at least one first articulated arm (14) contains: - the first element (20), wherein the said first element (20) is pivotally connected by the first end (21) to the corresponding support element (16), in its central part (22) is pivotally connected to the second element (23), and by its opposite second end (24) is pivotally connected to a slider (25) which passes under the respective carrier platform (11, 12) by slide means (26), said slider (25) comprising two side sliding blocks (60) and a movable top pin (52) , and each end of the specified movable top pin (52) is associated with one of the specified side sliding blocks (60); - a second element (23), wherein said second element (23) is pivotally connected with its first end (27) to said central part (22) of said first element (20), and its opposite second end (28) is pivotally connected to the corresponding carrier platform (11, 12) characterized in that each side sliding block (60) contains means for adjusting its height (H). 2. Hydraulic lifting device according to claim 1, characterized in that in each pair of articulated arms (14, 15) the second articulated arm (15) contains: - the first element (30), wherein said first element (30) is pivotally connected by its first end (31) to the corresponding support element (17), and its opposite second end (34) is pivotally connected to the second element (33), - the second element (33), wherein said second element (33) is pivotally connected by its first end (37) to the second end (34) of said first element (30), and by its opposite second end (38) is pivotally connected to the corresponding carrier platform ( 11, 12). 3. A hydraulic lifting device according to any one of the preceding claims, characterized in that said lifting means (13) comprise hydraulic actuators (40) for driving said articulated arms (14, 15). 4. Hydraulic lifting device according to any of the preceding claims, characterized in that each of the elements (20, 23, 30, 33) of the first articulated arm (14) and the second articulated arm (15) contains two symmetrical rods (20a, 20b, 23a , 23b). 5. Hydraulic lifting device according to claim. 4, characterized in that the specified first element (20) by the first end (21) is pivotally connected to the corresponding support element (16) using two lower coaxial pins (50), in its central part (22 ) is pivotally connected to the second element (23) by means of two central coaxial pins (51), one for each symmetrical rod, and its opposite second end (24) is pivotally connected to the said slider (25) by means of a movable upper pin (52) . 6. Hydraulic lifting device according to claim 3, characterized in that said hydraulic actuators (40) contain for each articulated arm (14, 15) two paired hydraulic cylinders (40a, 40b), each of which is pivotally connected at one end to the first corresponding element (20, 30) using an intermediate sleeve (40c), and the opposite end with the bracket (23c, 33c) of the specified second corresponding element (23, 33). 7. Hydraulic lifting device according to any one of the preceding claims, characterized in that said side sliding block (60) comprises an upper part (63) and a lower part (64) slidable relative to each other in the direction determined by the height (H) . 8. Hydraulic lifting device according to any one of the preceding claims, characterized in that said height adjustment means (H) comprise one or more manipulation pins (67) located in two respective counter-threaded through holes (68) made in said lower part (64).

Images