JPH012998A - A lifting device that combines an indirect drive arm member and a nesting member that is attached to a car. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a lifting device mounted on a motor vehicle. The lifting device is supported by the vehicle structure and includes a lifting portion for raising a nacelle suitable for carrying personnel and/or objects. Said lifting device is used for carrying objects and, in particular, personnel for working in places that are difficult to reach by other means.

[Description of prior art]

Lifting devices of the aforementioned type are known and are provided with a nacelle or platform supported by a system of mechanically actuated longitudinal telescoping members. However, known lifting devices of this type have a very limited range. That is, the nacelle or platform is only raised substantially longitudinally with respect to the vehicle.

However, when equipped with a lifting device, arbitrary horizontal movements may have to be performed by the same vehicle.

Furthermore, the heights reached by known structures are extremely limited;
Otherwise, a motor vehicle equipped with a lifting device would not be able to drive on the road due to its size and shape, even with the device lowered.

Lifting devices of the general type in which the nacelle is supported by a system of reciprocating pivoting arm members and driven by a hydraulic cylinder are also known. This lifting device not only has a wide working radius but also has a very high lifting height. This is because the nacelle can also be moved horizontally by means of an indirectly driven arm system. Said system can be installed in the middle of a rotating thrust block driven by a suitable prime mover of the motor vehicle. However, such horizontal movement is rather limited since the system must remain stable with its center of gravity always within the range of ground support. This range is increased in motor vehicles with support systems equipped with hydraulic jacks, but is relatively limited with respect to the range of support inherent in the motor vehicle. When moving the nacelle in the horizontal direction, the center of gravity is affected due to the fact that the end elements of the system of arm members for supporting the nacelle are very heavy or because the entire system of arms has to be moved in the direction of the orientation of the nacelle. Large movements limit the possibility of using the nacelle in accordance with proper safety limits.

[Object of the Invention] The main object of the present invention is to provide a nacelle that can reach very high working heights while maintaining safety limits when mounted on a motor vehicle, and that allows the nacelle to be moved significantly horizontally, thereby increasing the reach. On the other hand, it is an object of the present invention to provide an automobile equipped with a lifting device that has all the dimensions and shapes that allow it to drive on the road with the system completely lowered.

This objective is achieved by a lifting device according to the invention. The device includes a system of arm members mounted on a motor vehicle and pivotable back and forth by means of a hydraulic cylinder, and a nacelle coupled to the upper end of the system and raised and moved by it, the system being moved by another hydraulic cylinder. It is characterized in that an additional system of driven telescoping members is rotatably inserted between the upper end of the system of arm members and the nacelle.

[Summary and Effects of the Invention] According to the present invention, a system comprising an arm member mounted on an automobile and reciprocatingly pivoted by a hydraulic cylinder, and a nacelle coupled to an upper end of the system and capable of being raised by the system are provided. A lifting device is provided, characterized in that an additional system consisting of telescoping elements and driven by a hydraulic cylinder is inserted between the system of arm elements and the nacelle.

With said configuration, the lifting device can raise the nacelle by vertically directing the latter system to a very high position that can be reached by the system of arm members and the additional system of telescoping members, or if If the nacelle is raised to a height that it can reach by the system of arm members alone, it is possible to move the nacelle horizontally to a large extent by orienting the telescoping members horizontally. Even when the nacelle is moved horizontally over considerable distances in this way, it does not compromise its stability, since only the end elements of the system of telescoping members are laterally distracted with the nacelle, whereas more This is because the system of heavy arm members is maintained in equilibrium or, if necessary, can be moved significantly to the opposite side in order to maintain stability. Furthermore, by tilting the system of nested members, an intermediate situation between the two extreme situations described above can be obtained. Thus, a wide range of selective working regimes of the nacelle, which could not be achieved with known systems, are covered by the lifting device of the invention.

On the other hand, when the lifting device is lowered into the rest position of the motor vehicle carrying it, a system consisting of an arm member in the lowered position and a nesting member is used to reduce its height to a dimension compatible with traffic regulations. The system can be oriented horizontally above the cab of the vehicle using the length of the vehicle itself.

[Description of Examples] Number 1 exemplifies the floor portion of an automobile. The car is shown as a truck with a driver's seat 2 and wheels 3;
Trailer, rail road vehicle, etc. are also suitable. A thrust block 4 for receiving the lifting device is suitably mounted on the floor section 1, and a structure 5 comprising a telescopic arm 6 is furthermore provided to ensure safe support to the ground during operation of the lifting device. provided. Said arm 6 has a longitudinal jack 7 suitable for providing support to extend the range of support as required, as shown in FIG.

The thrust block 4 is provided with a turret 8 forming the base element of the lifting device. The thrust block 4 may be rotated with respect to the vehicle by any known means, preferably by a suitable motor, together with the turret 8 to orient the lifting device. Two connecting rods 9, l○ are indirectly connected to the turret 8 and the arm member or first lifting arm 11 to form a parallelogram. The first lifting arm 11 is a hydraulic cylinder 12
The ends of the hydraulic cylinder 12 are indirectly connected to the first lifting arm 11 and the base of the turret 8, respectively. The elements described herein are referenced to one side of the lifting device. However, in some embodiments and embodiments to be described hereinafter, they are of dual configuration and are provided on the other side of the lifting device as well, as shown in FIG.

A cradle 13 is indirectly coupled to the end of the first lifting arm 11 . Said cradle 13 is also connected to connecting rods 9 and 10 by tie rod struts 14. The shape of these members maintains the cradle 13 in substantially parallel motion with respect to the various configurations of the system. If the hydraulic cylinder 12 is not actuated, these parts are brought to the rest position illustrated in FIGS. 1 and 4, where they interdigitate and the overall size is very low. When using the lifting device, the hydraulic cylinder 12
is actuated so that the member is raised either partially as shown in FIG. 5 or completely as shown in FIG. 6, as required for lifting.

A second lifting arm 15 driven by a hydraulic cylinder 18 is indirectly coupled to the cradle 13 . The hydraulic cylinder 18 is indirectly connected to one end of the cradle 13 . A counter cradle 16 is indirectly coupled to the other end of the second lifting arm 15 . Counter cradle 16 is further coupled to cradle 13 by tie rods 17. These elements are shaped such that the counter cradle 16 maintains itself substantially parallel with respect to various configurations of the system.

If the hydraulic cylinder 18 is not actuated, the parts can be brought to the rest position shown in FIG.
is lowered onto the lifting arm 11 of the motor vehicle, and the counter cradle 16 covers the driver's seat 2 of the motor vehicle with the minimum overall dimensions. When the lifting device is in use, the hydraulic cylinder 18 is actuated, thereby raising the member to the position illustrated, for example, in FIGS. 14 and 16.

An elongate or first element 19 of the system of telescoping members is indirectly connected to the countercradle 16 .

One of the elements can be oriented with respect to the countercradle 16 by means of a hydraulic cylinder 20, so that the element 19 can be oriented between a horizontal position (see FIGS. 15 and 16) and a vertical position (see FIGS. 14 and 16). can be selectively placed at any position.

Inside the first element 19 the second element 22 is inserted and guided by its own rolls 23, 23' and the rolls 21 of the first element 19. Said rolls allow the second element 22 to slide telescopically with respect to the first element 19. In a similar manner, the third element 25 is inserted into the second element 22 and guided by its own rolls 26,26' and the rolls 24 of the second element 22. Said roll allows the third element 25 to slide telescopically with respect to the second element 22. The three elements 19.22 and 25 are provided in pairs on each side of the lifting device, thereby
Hydraulic cylinders 27 arranged between paired elements form a telescoping system of telescoping members.

The ends of the system are connected to the first element 19 and the third element 25 as shown in FIGS. 8-12. The system of telescoping members can be lowered by means of a hydraulic cylinder 27, as shown in the canister 1, or extended as required, as shown in FIGS. 14-16.

The tip of the third element 25 has a bracket 28 that is indirectly connected to the nacelle 30. The angle of the nacelle 30 with respect to the bracket 28 is regulated by the hydraulic cylinder 2o. If necessary, the hydraulic cylinder 27 (which regulates the angle of the first element 19 and thus the angle of the system of nested elements) and the hydraulic cylinder 29 (which eventually regulates the already existing angle with respect to the bracket 28) , thus regulating the angle of the system of nested members) can be constrained in the reciprocating direction in the most suitable manner so that the nacelle 30 maintains itself substantially parallel for various configurations of the system.

The lifting device described has a wide variety of uses. This is because the nacelle 30 can be vertically and horizontally displaced within wide limits by combining the various possible movements of its components. Thus, for example cylinder 12.
20 and 27, but not cylinder 18, the situation shown in FIG. 13 results, with nacelle 30 being raised very high vertically above the vehicle carrying it. On the other hand, when the hydraulic cylinder 18 is extended, the situation shown in FIG. 14 is provided, and the nacelle 30 is raised to its maximum extent vertically above the vehicle carrying it.

On the other hand, if the hydraulic cylinder 2o is not extended, the element 19
25 is arranged horizontally. When the system is extended, the nacelle 30 will remain as shown in FIGS.
With respect to two different heights as shown in Figure 6, it is possible to extend it to a large extent in the lateral direction relative to the vehicle carrying it.

As best shown in FIGS. 15 and 16, nacelle 3
0 is laterally biased with respect to the vehicle carrying it, the majority of the members of the lifting device unit are located near the vehicle vertical line.

From this, by arranging the lifting device of the present invention in a specific manner, it is possible to greatly deflect the nacelle in the lateral direction without shifting the center of gravity out of the range of support relative to the ground. In certain configurations, such as that shown in FIG. 15, the second lifting arm 15 is positioned in the opposite direction from the nacelle.
A strong counterweight is created. Thus, by using these arrangements, large lateral excursions of the nacelle under heavy loads can be achieved.

If the lifting device is particularly
When the arrangement illustrated in Figures 19 and 14 is reached, and alternatively when it is necessary to maximize the extension of the nested member system consisting of elements 19 to 25, movement of said nested member system with respect to each other is prevented. Braking means, not shown, are provided for this purpose and for blocking one telescoping element against the other. This device prevents swinging of the arms and thereby avoids pendulum movements of the nacelle 30.

Of course, the invention is not limited to only the illustrated arrangement; many arrangements are possible by only partially elongating the various hydraulic cylinders. FIG. 17 shows all the possible excursions of the lifting device, illustrating in two dimensions the range of positions covered by the nacelle. 17, the turret is mounted on a rotatable turret block and is therefore mounted on a rotatable turret block by rotating a rotating solid body located coaxially with the thrust block and in the two-dimensional range shown in FIG. , it should be appreciated that the nacelle is moved in three dimensions.

As best shown in FIG. 1, in the rest position the nacelle 3o is located at a very low height relative to the ground at the rear of the vehicle. This facilitates access prior to boarding the nacelle.

Although the invention has been described with reference to specific examples, it should be remembered that many modifications may be made thereto.

[Brief explanation of the drawing]

FIG. 1 is a side view of an automobile equipped with a lifting device of the present invention, showing a state in which the lifting device is lowered for driving on the road. FIG. 2 is a front view of the vehicle shown in FIG. 1. FIG. 3 is a plan view of the support leg of a motor vehicle shown in an extended state in phantom lines. No lifting device is shown here. FIG. 4 is a side view illustrating a state in which the indirectly driven arm is completely lowered. FIG. 5 is a side view illustrating a state in which the indirectly driven arm is partially raised. FIG. 6 is a side view illustrating the indirectly driven arm in a fully raised state. FIG. 7 is a front view showing the lifting device in its fully extended state, with each lifting device being separated from the vehicle. FIG. 8 is an enlarged side view of the arm end of the system of telescoping members. FIG. 9 is an enlarged side view of the other end of the arm of the system of telescoping members. FIG. 10 is a front view of the arm end of the system of telescoping members. FIG. 11 is a partially cutaway front view similar to FIG. 10 showing the end and intermediate portions of the system of nested members. FIG. 12 is an enlarged cross-sectional view of FIG. 10 taken along the line ■--■. FIG. 13 to FIG. 16 are front views showing the movement status of the lifting device. FIG. 17 is a schematic representation of the working range that can be reached by the lifting device. The names of the main parts in the figure are as follows. 1. Floor part 4, Thrust block 6 Gorm 7, Vertical jack 8, Turret 9.10: Connecting rod 11: First lifting arm 12.18, 20.27.29: Hydraulic cylinder 13, Cradle 14: Tie rod Pillar 15; Second lifting arm 16; Counter cradle 17, tie rod 28, bracket 30; Nacelle agent's name Motohiro Kurauchi,' \ Same as Hiroshi KazamaFig, 16 Procedural amendment (method) July 6, 1985 1986 Patent Application No. 74849 Person making amendment

Claims (1)

[Claims] 1. A hydraulic cylinder (12) attached to an automobile (1 to 3)
, 18), the arm member (11,
15), the arm member (11
, 15), comprising a nacelle (30) connected to the upper end of the system and raised and biased thereby, an additional system consisting of telescoping members driven by hydraulic cylinders (20, 27). , the arm member (11
, 15) and said nacelle (30
) A lifting device characterized in that it is rotatably interposed between. 2. The additional system of nested members comprises at least two elongated elements (19, 25) nested one into the other.
) and guide rollers (21, 26) for reciprocating motion.
is provided, one of said elongate elements (19) being indirectly coupled to a system of arm members (11, 15), and said one elongate element (19) having an inclination of an additional system of said telescoping members. Hydraulic cylinder for adjustment (2
0) is coupled, the other elongate element (25) is indirectly coupled to the nacelle (30), and the other elongate element (25) is indirectly coupled to the nacelle (30).
5) has a hydraulic cylinder (2) for adjusting the inclination of the nacelle.
0) is coupled to the lifting device according to claim 1. 3. Lifting device according to claim 2, wherein the additional system of telescoping members is composed of three elongated elements (19, 22, 25). 4. One of the elongate elements (25) constituting the additional system of telescoping elements comprises a bracket (28) offset in the axial direction of said system for supporting the nacelle (30). Lifting device according to scope 2. 5. The sides of the bracket (28) have three elongated elements (19, 22, 25 5. The lifting device according to claim 4, wherein the lifting device is bent downwardly with respect to the axis of the lifting device. 6. The system consisting of the arm members (11, 15) includes a turret (8) to which the arm member (11) is indirectly coupled by a pair of coupling rods (9, 10) and is actuated. A hydraulic cylinder (12) is coupled to the arm member (11), and a cradle (13) is coupled to the arm member (11).
are indirectly connected to each other, the cradle (13) is guided by a rod strut (14), and the other arm member (15) is indirectly connected to the cradle (13), and the other arm member (15) has an actuating member. A hydraulic cylinder (18) is coupled and a counter cradle (16) is coupled indirectly, the counter cradle (16) being connected to the rod (17).
Claim 1, wherein the countercradle (16) forms an element of the system of arm members (11, 15) to which an additional system of nested members is indirectly connected. Lifting device as described. 7. Between the three elongate elements (19, 22, 25) constituting an additional system of telescoping elements, in order to achieve a suitable operating condition of said telescoping elements when used in a lifting device, there are 2. A lifting device according to claim 1, further comprising braking means for mutually preventing movement of two nested members. 8. Lifting device according to claim 6, wherein the turret (8) is mounted on a thrust block (4) carried by the floor part (1) of the motor vehicle. 9. A system that is attached to a car and consists of arm members (11, 15) is attached to the floor part of the car (
1) is lowered below the driver's seat (2), the counter cradle (16) is positioned above the driver's seat (2), and said three elongated elements (19, 22, 25) are connected to said arm member ( 11, 15) and the nacelle (30) is located at the rear end of the vehicle at a low height from the ground.
The lifting device according to any one of Items 8 to 9.