FI116046B - Actuator Arrangement for Drive Bridge - Google Patents

Description

116046

Actuator Arrangement for Drive Bridge

The present invention relates to an actuator arrangement for a drive bridge, which is specifically designed for use with a 5 truck trailer or the like. The actuator arrangement includes a body that is pivotally coupled to the trailer body structure, which is coupled to the end of the inclined surface of the body structure by means of a ni-10 knife, hinge arrangement or the like forming the first pivot point. The frame member is arranged to be moved by actuators, such as one or more hydraulic cylinders or the like, by rotating it relative to the first pivot point, first to the inclined surface of the rear frame and then to the operating position substantially parallel to the inclined surface. The actuator arrangement is further implemented by at least a two-piece articulated link-20 mechanism which is pivotally connected to the body.

. A conventional way of implementing the aforementioned actuators> '(; the arrangement is e.g. as shown in Fig. 1, such that the lower part of the drive bridge 25 is connected by a pivot mechanism from its lower end to the end of the hydraulic ram. In practice, a solution of the type I operates such that, in its ready position, firstly, the so-called longitudinal and secondly below the slanting structures of the trailer:;: 30 the visible hydraulic cylinder pulls the frame into a substantially slanting operating position; The main problem with this type of solution is that the hydraulic roller cylinder is always under the slanting surface of the trailer at all times, since it is also in its stand-by position, so long as it practically has ground clearance. at the lowest point 2 116046 trailers, it is constantly exposed to shocks, bumps and dirt when moving the trailer. As a result, in spite of good maintenance and servicing, especially the hydraulic cylinder 5 drawbar can easily be damaged thereby slowing down or preventing proper use of the drive bridge. On the other hand, the conventional solution implemented in the manner described above is particularly disadvantageous for the power application of the hydraulic cylinder, since the power requirement of the articulation mechanism connected only to the lower end of the movable body part is maximum due to very short torque arms.

Of the solutions disclosed in JP 1 0000 976, SE 403 737, GB 2 049 612 15 and US 6,125,491, it is known per se to utilize at least two-part swivel deck structures for swivel deck structures and two-point swivel arms which are not connected to the frame however, the purpose of the job as such is not satisfactory-. highly exploitable.

• · ·

The purpose of the actuator arrangement of the present invention is to provide a decisive improvement on the above-mentioned problems and thereby substantially increase the state of the art. To accomplish this purpose, the actuator arrangement of the invention is characterized in that the first link arm comprises a fixed support arm, such as a rod or the like, which is pivotally connected to the actuators 1! '. of the hydraulic cylinder or the like, and on the other hand substantially at the end surface of the frame member * '** 3 5, at a distance from the first pivot point, which allows the frame member to be opened into the operating position by the thrust of the hydraulic cylinder.

3, 116046

The main advantages of the actuator arrangement according to the invention are its simplicity of construction and operation and its reliability. Due to the actuator arrangement according to the invention, it is possible to implement the movable body by means of at least a two-part linkage mechanism so that the hydraulic cylinder belonging to the actuators acting on it is in a so-called stand-by position. short, allowing it to be retracted with its working arm 10 protected from environmental conditions. On the other hand, the actuator arrangement according to the invention has the advantage that, thanks to the operating principle described above, the components thereof can be further positioned so that the body part is moved from the ready position to the operating position by a hydraulic cylinder with respect to the first pivot point. pushing from above. Due to the advantageous actuator arrangement of the invention, the at least two-part articulated linkage mechanism also makes it possible to utilize significantly longer torque arms than the present solutions, which enables the hydraulic cylinder. ·, Is clearly smaller than the current ones. A further advantage of the actuator arrangement according to the invention is that it does not require any additional maintenance and servicing, with the components included therein, both in the ready position and in the operating position, completely inside the bevelled surface and the body part *. .. · protected by structures.

Advantageous: The actuator system according to the invention is advantageous: embodiments are disclosed in the dependent claims.

The following description illustrates the invention. 35 detailed in the accompanying drawings; with reference to, where 4 116046 in Figure 1 is a conventionally executed drive bridge with actuator arrangements in a standby and operating position, 5 in Fig. 2 is a motion sequence of operating the actuator assembly of the invention from that standby to operating position, 10 and Figure 3 is a top view of implementation.

The invention relates to an actuator arrangement for a driving bridge, which is intended in particular for use with a truck trailer or the like. The actuator arrangement comprises a body part 1, which is pivotally coupled to the trailer body structure R. . ·. which is connected to the end of the inclined surface V in the frame structure by a ... joint, hinge arrangement or the like forming the first pivot point N. The body member 251 is arranged to be moved by actuators T, such as one or more hydraulic cylinders or the like, by rotating it with respect to the first pivot point N, first to stand-by position I, against the chamfer surface V and ·, · · 30 in the trailer body. -:; as an extension of the bevelled surface V. Furthermore, the actuator arrangement is implemented by means of at least a two-piece articulated link mechanism which is pivotally connected to the frame part 1. The first pivot arm 2 of the actuator arrangement comprises a fixed support arm, such as a rod or the like, pivotally connected to one end of the hydraulic cylinder T1 of the actuators T or the corresponding ram T2 of the actuator T and 5116046, respectively. 1 to the end surface X, at a distance from the first pivot point N, which allows the body 1 to be opened to the operating position II by applying the thrust F of the hydraulic cylinder T1.

The second pivot arm 3 comprises a variable mechanism, such as a telescopic arm or the like, which is pivotally coupled 10 to the end M1 of the hydraulic cylinder push rod T2

15

In particular, according to the first and last views of Fig. 2, actuators T included in the actuator arrangement, such as one or more hydraulic cylinders T1 or the like pivoting on the frame structure R and the frame member 1, and the pivoting linkage mechanism 2, 3 are arranged

, viewed in both standby and operating positions I, II

completely invisible within the structures of the bevelled surface V and the frame part 1.

25

With particular reference to the preferred embodiment shown in Figure 3, the second link arm 3 is implemented as two parallel shock absorbers 3a or the like. Further, with reference to this view, at least:; tension-limiting means 4, such as one or more ropes, chains or the like, for limiting the maximum movement of the second link arm 3.

A further preferred embodiment is an actuator arrangement implemented in a single unit, disposed from above, substantially symmetrically in the center of the bevelled surface V and the body portion 1 of the frame structure 6116046. In addition, through the inclined surface V of the frame structure and the corresponding point of the frame part 1, passages L1, L2 are provided to allow unhindered movement of the parts included in the actuator arrangement 5.

It is to be understood that the invention is not limited to the embodiments described or described above, but that it can be modified in many ways within the scope of the basic idea of the invention. First, it is of course possible to implement the actuator arrangement with two separate units located at opposite edges. On the other hand, the articulation mechanisms may be implemented in a manner different from that shown, e.g., by rotating 15 fixed articulation points or their position relative to another articulation. On the one hand, it is also possible to implement another articulation mechanism in a variety of constructions, whereby its most important feature is that it is first adjustable in length and, on the other hand, in a given situation is nevertheless conveying traction. Still. It is, of course, clear that the * I ·. the actuator arrangement can be utilized in connection with any moveable vehicle bridge.

Claims (7)

1. A driving bridge device, said driving bridge, which is intended to be used in particular in connection with a truck 5 of a truck or the like, belonging to a stem part (1) which is coupled to the rear structure (R) in a reversible manner at an end of a cutting surface (V) in the trunk structure through a first line point (N) forming hinge, threading device 11 or equivalent and which is movably arranged by means (T), such as one or more hydraulic cylinders or the like; by turning (w) the same in relation to the first line point (N), first and foremost to a standby position (I), against the existing structure of the truck! oblique surface (V), and on the other side to an upright position (II) as well as a substantially parallel extension to the oblique surface (V) existing, the device being realized by an at least two-part articulated mechanism which has been interconnected with the stem part (1) at least two , characterized in that a first guide arm (2) of the device belonging to the device comprises a fixed support arm, such as a rod or the like, which is fixed in a rotatable manner on one side at one end (M1) in a shock arm (T2) of a hydraulic cylinder (T1) belonging to the means (T) or the corresponding and, on the other hand, substantially at the end surface (X) of the stem member (1), at a distance from the first line point (N), which allows to open; The stem portion (1) to its position of use (II) by utilizing the supporting force (F) of the hydraulic cylinder (T1). •> i 2. A device according to claim 1, characterized in that a second pivot arm (3) belonging to the same comprises a telescope-structured or corresponding arm mechanism, the length of which can be changed, which is coupled in a reversible manner at one end at the end. (M1) of the hydraulic cylinder thrust arm (T2) and Δ second side substantially in connection (Y) with the upper edge of the stem member (1) (in standby position I), ρΔ opposite side 5 of the first linkage arm's point (X) in relation to the hydraulic cylinder (T1). A device according to claim 1 or 2, characterized in that the means (T) of the device (T), such as one or more, rotate Δ one side in relation to the trunk structure (R) and Δ other side in relation to the trunk part (1). hydraulic cylinders (T1) or equivalent, and the guide arm mechanism (2, 3) are arranged to position themselves, viewed from the side, both under the standby and use position (I, II) completely and invisibly inside the oblique surface (V) and the structures of the stem (1). 4. A device according to claim 2, characterized in that the second guide arm (3) has been realized by two parallel support dampers (3a) or the like. * · J * »· 5. Device device according to claim 4, characterized in that, in conjunction with the second link arm (3), at least traction intermediary limiting means (4), such as one or more wires, chains or the like, are arranged to: limit it. the maximum length of movement of the second guide arm (3). (tl I 6. Device device according to any of the above claims 1-5, characterized in that it has been realized by a unitary unit which is positioned, when viewed from above, substantially in a symmetrical manner in the middle of the frame structure. (R) belonging to the oblique surface (V) and of the stem portion (1). 12 116046 7. Device device according to claim 6, characterized in that in it. The slanting surface (V) of the sarcture structure (V) and at a corresponding location in the stem part (1) are provided passages (Li, L2) to enable the unrestricted movement of the parts belonging to the device. t »t * * * * t 1; · »» T I s 5. t ♦ »l t I t * I»