MXPA97007055A - Dire impulsion apparatus - Google Patents

Abstract

A rear gate assembly for lifting heavy weights includes a main structure (1) that connects directly to the vehicle in which the lift is to be used. A rotating, hydraulic, double output actuator (31) is supported within the main structure (1) and is connected by means of bar (33A, 33B) at either end to a set of articulated arms (35A, 35B) which is they connect to the platform in turn to lift heavy weights (87). The bars (33A, 33B) protrude from either end of the rotary actuator (31), thus allowing the lifting torque to be applied substantially and equally to both sides of the lifting platform (87) and thereby providing a compact system capable of being completely located within the structure princip

Description

DIRECT DRIVE APPARATUS BACKGROUND OF THE INVENTION This invention relates in general to an apparatus for lifting heavy weights, hydraulic and in particular to a back gate apparatus, for lifting heavy weights, for vehicles, hydraulically operated.

Description of Related Art The tailgate assemblies for lifting heavy weights, for vehicles are used in a variety of products such as large trucks, cargo vans and, in particular, delivery vans. While these assemblies have generally been successful, their use is still problematic for a number of reasons. Many of the systems are very complex, using a series of pulleys and cables to raise the tailgate, as in the US patents Nos. 4,813,842 and 3,887,092. The complexity of these systems can create problems with the system's maintenance and reliability service.

REF: 025667 Other systems use hydraulic cylinders to elevate the platform, as in the North American patent No. 3,688,649; however, these systems require two cylinders, which must be coordinated to ensure even the lift, or they rely on a cylinder that can create problems with the stability of the platform to lift heavy weights. This instability of the platform can limit the ability to place loads on one side or corner of the platform for lifting. Systems that use a centrally located cylinder can resolve imbalances to lift heavy weights, but they require more space and expose many of the moving parts to the elements. This creates maintenance problems due to contamination, as well as security problems due to the exposed machinery. Accordingly, it is an object of this invention to provide a tailgate assembly for lifting large weights that directly apply lifting forces, equal on both sides of the platform to lift heavy weights, simultaneously.

Another objective of this invention is to reduce the complexity and cost typically associated with the assemblies of the tailgate to lift heavy weights. Still another object of the invention is to provide a rear gate assembly for lifting large weights that is easy to use and maintain. A further objective of this invention is to provide a mounting of the tailgate, for lifting large weights that is compact and unobtrusive. Another objective of this invention is to provide a mounting of the tailgate, for lifting heavy weights where the mechanism for lifting heavy weights is not exposed to the environment. These and other objects of the invention are achieved in a mounting of the rear hatch, for lifting heavy weights, for vehicles according to the invention.

BRIEF SUMMARY OF THE INVENTION A mounting of the tailgate for lifting heavy weights according to the invention includes a main structure that is directly connected to the vehicle. in which the lifting of large weights will be used. A rotary, hydraulic, double-outlet actuator is supported within the main structure and connected by means of rods at either end to a set of articulated arms which are in turn connected to the platform to lift heavy weights. These rods preferentially protrude from either end of the rotary actuator, thus allowing the lifting force to be applied substantially and equally on both sides of the platform to lift heavy weights. When the actuator is operated, it rotates the bars in the desired direction, which in turn rotate the articulated arms to either lift or lower the platform to lift heavy weights. Because only one actuator is used, and because it is connected directly to the mechanism for lifting heavy weights, the complexity of the system is significantly reduced. In addition, the system is very compact and in this way is able to be located or placed completely within the main structure. This protects the mechanism from environmental contamination and improves safety by covering most moving parts.

Brief Description of the Drawings The present invention will be better understood from a reading of the following detailed description taken in conjunction with the accompanying drawings in which similar reference designations indicate similar elements and in which: FIGURE 1 is a perspective view, schematic with the separate parts of the back gate apparatus showing the component parts; FIGURE 2 is a cross-section of the double vane rotary actuator of the apparatus of Figure 1; FIGURE 3 is a cross section of the individual vane rotary actuator that can be used in the apparatus of Figure 1; FIGURE 4 is a perspective view of the apparatus for lifting heavy weights, such as assembly, with the cover plate removed; the FTGURAS 5A, 5B, 5C are perspective views of the apparatus of Figure 1 in position in a delivery truck in three positions; and FIGURE 6 is a perspective view of the apparatus of Figure 1 in its stored mode.

Detailed description With reference to FIGURE 1, the door for lifting large weights, of direct drive includes a main structure 1 which is made of two vertical brackets 3A, 3B which are joined by the transverse members 5A, 5B. The main structure 1 is constructed of a metal such as steel or aluminum, or any other rigid, suitable material. The transverse members 5A, 5B are mounted horizontally between the vertical brackets 3A, 3B and parallel to each other, with sufficient vertical space between the two to accommodate the rotary actuator 31 and the hardware of the mechanically driven train. In another embodiment (not shown) a U-shaped channel of a piece can be replaced by the transverse members 5A, 5B. This can increase the stiffness of the main structure and reduce the total parts count, simplifying with the (ii .. i lii'o ???? li? Iicciuii of the < ii; .f > oilio.) The vertical bracket 3A it is made of two vertical rigid plates 2A, 2B which are kept parallel to each other and spaced sufficiently apart so that the upper articulated arms 35A, 35B can be rotatably supported between the two vertical plates 2A, 2B.The vertical plates 2A, 2B are attached by soldering or screwing them to a spacing plate 17A which holds the vertical plates 2A, 2B in their respective orientation In another other mode (not shown), a U-shaped channel, in one piece can be replaced by the vertical brackets 3A, 3B.This can increase the stiffness of the main structure and reduce the total count of parts, simplifying the construction of the device.The vertical bracket 3B is a mirror image of the bracket see tical 3A. The inner vertical plates 2 ?, 6A of the vertical brackets 3A, 3B have holes located between the transverse members 5A, 5B, through which the bars 33A, 33B are articulated. The supports 8A, 8B are mounted in the holes 4A (not visible), 4B to allow the free rotation of the bars 33A, 33B. The vertical brackets 3A, 3B are permanently attached to the transverse members 5A, 5B by means of a weld, or other mechanical joining means that ensures a proper, rigid connection. Two vertical actuator mounting plates 9A, 9B are interposed between the transverse members 5A, 5B. Mounts of the vertical motor 9A, 9b support the rotary actuator 31. In the illustrative embodiment, the assemblies of the actuator 9A, 9B are welded to the transverse members 5A, 5B, or can be secured with latches or pins or other conventional means. The actuator assemblies 9A, 9B are generally rectangular in shape and have slots 10A, 10B respectively cut completely to allow the rotary actuator 31 to be installed or removed without requiring the removal of the actuator assemblies 9A, 9B. The rotary actuator 31 is maintained for the actuator 9A assemblies, 9B by screws or other fastening means. The assemblies of the actuator 9A, 9B can be made of metal such as aluminum or steel, or some other rigid, suitable material that will serve to fix or hold the rotary actuator 31 to allow energy to be transmitted from the rotary actuator 31 to the door for lift heavy weights 87. United a. the upper portion of the vertical brackets 3A, 3B are the mounting brackets 7A, 7B that allow the complete main structure 1 to be joined by conventional means to the rear of a vehicle as shown in FIGS. 5A, 5B and 5C in which the door to lift heavy weights must be fixed. A cover plate 11 is attached to the cross members 5A, 5B enclosing the mechanically driven train including the rotary actuator 31, and the bars 33A, 33B. Referring again to FIGURE 1, the lifting force for the door for lifting large weights is provided by a gating actuator 31 which, in the preferred embodiment, is hydraulically actuated. Hydraulic power can be provided through conventional means. In the illustrative embodiment, the hydraulic pressure is provided by a hydraulic pump 43 which extracts fluid from a hydraulic reservoir 45 and supplies hydraulic fluid under pressure through a fluid transfer line 47 to the rotary actuator 31. The fluid is returned to the reservoir 45 through a second fluid transfer line 49. The flow of the hydraulic fluid is controlled in the reservoir 45 by a solenoid 46 and in the rotary actuator 31 by a flow regulator 44. The increase or decrease in the pressure delivered by the pump 43 is controlled by a switch or control switch 51. Also, the lifting of heavy weights can be disconnected from a remote location, typically the truck cabin by means of a cut-off switch 52. With reference to FIGURE 2, in the illustrative embodiment, the hydraulic rotary actuator 31 is a hydraulic actuator, of the double vane type of a type such as those produced by, and commercially from Reuter / Sollami Company. The actuator 31 is a fluid operated actuator made of a hollow body 100 with header assemblies (not shown) mounted on both ends, which create a chamber 101 therein. A bar 102 extends through the chamber 101 and through the header assemblies. Two longitudinal, radially placed stators 103, 104 are mounted in the body between the header assemblies. The annular supports (not shown) are fixed in the first and second header assemblies and the bar 102 is articulated in the supports. Two radially disposed longitudinal vanes 105, 10b are moved to bar 102 and extend from the first header assembly to the second header assembly. The seals or shutters 107, 108 are mounted on the stators 103, 104 to seal the stators 103, 104 to the bar 102 and to the header assemblies. The second seals or shutters 109, 110 are mounted on the vanes 105, 106 to seal the vanes 105, 106 to the body 100 and to the header assemblies. The holes (not shown) are provided to selectively admit fluid under pressure in the chamber 101 to one side of the stators 103, 104. As the pressurized fluid is admitted into the chamber 101 on the selected and opposite sides of the vanes 105, 106, a torque is created which rotates the bar 102 in the selected direction. Other embodiments may use a rotary, hydraulic, single blade actuator as shown in FIGURE 3 and as described in U.S. Patent No. 4,495,856, which is incorporated herein by reference. Other forms of rotary actuators that may be known in the art, such as electromechanical actuators or other forms of hydraulic actuators may also be used, rotating. If an electromechanical actuator is used, the energy can be extracted directly from the vehicle's electrical system or from an independent power system such as a battery. Referring again to FIGURE 1, the rotary actuator 31 has portions of the exit bars 80, 81 that extend on either side (which are extensions of the bar 102), which are connected to the bars 33A, 33B by means of coupling rods 39A, 39B. The coupling rods 39A, 39B are mounted around the ends of the output rods 80, 81 and the rods 33A, 33B. A plurality of locking pins 82 are mounted axially within the coupling rods 39A, 39B at the interface between the coupling rods 39A, 3913 and the output rods 80, 81 and the rods 33A, 33B. The locking pins 82 are held in place by the locking screws 87. In an alternative embodiment (not shown), the output bars 80, 81 are joined to the bars 33A, 33B by grooves or grooves. Other conventional means may also be used to join the bars as may be known in the art. The bars 33A, 44B are rigidly connected to the upper articulated arms 35A, 35B in a similar manner, except that the coupling rods 36A, 36B are welded directly to the upper articulated arms 35A, 35B. The bars 33A, 33B are articulated through the inner vertical plates 2A, 6A of the vertical brackets 3A, 3B by means of the roller supports 41A, 41B which allows the bars 33 ?, 33B to rotate freely. Other forms of supports may also be used as may be known in the art, provided that the bars 33A, 33B are allowed to rotate freely. The upper articulated arms 35A, 35B are rotatably attached to the structure for lifting large weights 81. The rotatable joint can be made from a spindle or bolt 90, a guide or bushing 91 and a clamping ring 92 which keeps the spindle in its place, or other conventional pivots can be used. The lower articulated arms 37A, 37B are rotatably joined by means or similar to the vertical brackets 3A, 3B and the structure for lifting large weights 81. The platform for lifting large weights consists of a structure for lifting large weights 81 which is can articulably attach to a door for lifting large weights 87. The heavy lift structure 81 includes a transverse member 83 which is a substantially rigid unit that can be made of metals such as aluminum, steel, iron, or other rigid material , suitable. Attached to the transverse member 83 are the vertical mounts 85A, 85B. Mounts 85A, 85B are metal "U" shaped pieces and are welded to cross member 83 or otherwise joined in a substantially permanent and rigid manner. The vertical mounts 85A, 85B are mounted in such a way that the open end of the "U" faces the main structure 1 so that the upper and lower articulated arms 35A, 35B, 37A, 37B can be fixed in the opening of the "U" when the heavy lifting is in the raised position. In addition, the width of the vertical mounts 85 ?, 85B is sufficiently narrow that when the door for lifting large weights 87 rises to its vertical position, the vertical mounts 85A, 85B will be fixed within the space formed between the vertical plates 2A, 2B , 6A, 6B making the vertical brackets 3A, 3B. This allows the heavy lift gate 87 to be pulled to the same level as the main structure 1 when in the raised position so that there is no gap between the door 87 and the main structure 1. The heavy lift door 87 provides the lifting surface for the device. This comprises a rectangular platform of the general dimensions of a rear hatch of the delivery truck, conventional. This is comprised of a rigid material, suitable such as steel or aluminum and can be solid or reinforced. The heavy lift door 87 can also be sized larger than a conventional hinged tailgate to allow storage with conventional dimensions as shown in FIGURE 4. The extension of the tailgate 120 is rotatably mounted on the end free of the door 87. The door for lifting heavy weights 87 joins the structure to lift heavy weights 81 by means of a joint. The hinge is formed by inserting a hinge shaft 91 through the holes 92A, 92B drilled in the bases or bottoms of the vertical mounts 85A, 85B and inserted through a tube 94 that is attached to the vehicle side of the vehicle. the door for lifting heavy weights 87. Other conventional forms of rotatable joints can be used. When opened, the heavy lift door 87 is maintained in a horizontal position by means of two heavy lift cables 89A, 89B which are each attached to one end of the upper part of the vertical mounts 85A, 85B and in the other ends of the outer edge of the door to lift heavy weights 87. Chains or other flexible material can be used as cables to lift heavy weights. FIGURE 4 illustrates the apparatus in its assembled or assembled state. The plate 11 is not shown so that the internal components can be observed. To operate the door for lifting heavy weights, the rotary actuator is activated to provide a torque to the bars 33A, 33B. When the bars are turned in the upward direction, they rotate the upper articulated arms 35A, 35B, thereby pulling the structure to lift large weights 81 in the upward direction. As seen in FIGURE 5A, when the lifting of heavy weights is completely lowered the door for lifting heavy weights 87 rests against the ground. As in FIGURE 5C, when fully raised, the heavy lift door 87 is on the same level as the main structure 1 and "therefore, at the same level with the truck platform." As seen in FIGURE 6, in the raised position, the heavy lift door 87 can be bent up and locked or locked in the closed position by means of the fasteners or latches 96A, 96B In accordance with the principles of the invention, the large lift assembly Weights provides a lifting force on both the left and right side of the platform to lift large weights simultaneously through a simple and direct mechanical means, by centering the power source in relation to the structure and removing the pulleys or In order to transmit the energy, the application of force on both sides is ensured.The maintenance is also reduced due to the reduced complexity of the device. Torsion preferably that direct force [.To lift the platform, the mechanism is much more compact. As can be seen in Figure 4, the complete lifting mechanism can be located within the main structure 1. This allows the mechanism to be hermetically sealed from the environment by the cover plate 11 (not shown), which prevents pollution and also reduces maintenance. Safety also improves by virtue of the enclosed drive train. The apparatus shown is designated for use with delivery vans, however, the apparatus can be scaled up or down for use in different applications. For example, lifting heavy weights can be used on a jetty, or increased in scale for use on large trucks. Although certain preferred embodiments and methods have been described herein, it will be apparent from the foregoing description for those skilled in the art that variations and modifications of such embodiments and methods can be made without departing from the true spirit and scope of the invention. . Therefore, it is proposed that the invention should be limited only to the extent required by the appended claims and the rules and principles of the applicable law.

It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates.

Having described the invention as above, property is claimed as contained in the following:

Claims (20)

1. An apparatus of the rear hatch, for lifting heavy weights, for vehicles, characterized in that it comprises: a mounting structure adapted to be coupled to a vehicle; a rotating actuator having a body and a first exit bar, wherein the body is attached to the mounting structure; a first articulated arm having a first end and a second end, wherein the first end of the first articulated arm is coupled to the first exit bar; a structure for lifting large weights having an upper part, a bottom or base, a first side and a second side wherein the first side is rotatably joined to the second end of the first articulated arm; and a door rotatably connected to the bottom of the structure to lift heavy weights.

2 . The apparatus according to claim 1, characterized in that the rotary actuator has a second exit bar, the apparatus is further characterized in that it comprises; a second torsion bar having a first end and a second end, wherein the first end of the second torsion bar is joined to the second exit bar; a second articulated arm having a first end and a second end, wherein the first end of the second articulated arm is joined to the second end of the second torsion bar; and the second side of the structure for lifting large weights joins rotatably to the second end of the articulated arm.

3. The apparatus according to claim 2, characterized in that the rotary actuator is placed in the center of the mounting structure.

4. The apparatus according to claim 2, characterized in that the rotary actuator is an electromechanical actuator.

5. The apparatus according to claim 2, characterized in that the rotary actuator is an individual paddle hydraulic actuator.

6. The apparatus according to claim 2, characterized in that the rotary actuator is a double vane hydraulic actuator.

7. The apparatus according to claim 2, characterized in that it also comprises at least one fastening or fixing of the flexible door with two ends where one end is joined to the upper part of the structure to lift heavy weights and the other end is joined to the Free end of the door.

8. The apparatus according to claim 2, characterized in that it further comprises: a third articulated arm having first and second ends wherein the first ex-emo of the tereo-: articulated arm is connected in a rotatable manner to the mounting structure and the second end of the third articulated arm is rotatably connected to the structure for lifting heavy weights; and a fourth articulated arm having first and second ends wherein the first end of the fourth articulated arm is rotatably connected to the mounting structure and the second end of the fourth articulated arm is rotatably connected to the structure for lifting big weights

9. An apparatus for the tailgate, for vehicles, characterized in that it comprises: a mounting structure adapted to be coupled to a vehicle; a rotary actuator having a body and a first exit bar, and a second exit bar, wherein the body is joined to the mounting structure; a first torsion bar having a first end and a second end, wherein the first end of the first torsion bar is joined to the first exit bar; a second torsion bar having a first end and a second end, wherein the first end of the second torsion bar is attached to the second exit bar; a first articulated arm having a first end and a second end, wherein the first end of the first articulated arm is joined to the second end of the first torsion bar; a second articulated arm having a first end and a second end, wherein the first end of the second articulated arm is joined to the second end of the second torsion bar; a structure for lifting large weights having an upper part, a bottom, a first side and a second side wherein the first side is rotatably joined to the second end of the first articulated arm and the second side is rotatably joined to the second side end of the second articulated arm; and a door having an articulated end and a free end, where the articulated end joins rotatably to the structure to lift heavy weights.

10. The apparatus according to claim 10, characterized in that it further comprises: a third articulated arm having first and second ends wherein the first end of the third articulated arm is rotatably connected to the mounting structure and the second end of the third articulated arm is rotatably connected to the structure to lift large weights; and a fourth articulated arm having first and second ends wherein the first end of the fourth articulated arm is rotatably connected to the mounting structure and the second end of the fourth articulated arm is rotatably connected to the structure for lifting big weights

11. The apparatus according to claim 10, characterized in that the rotary actuator is placed in the center of the mounting structure.

12. The apparatus according to claim 10, characterized in that the rotary actuator is an electromechanical actuator.

13. The apparatus according to claim 10, characterized in that the rotary actuator is an individual paddle hydraulic actuator.

14. The apparatus according to claim 10, characterized in that the rotary actuator is a double vane hydraulic actuator.

15. The apparatus according to claim 10, further characterized in that it comprises at least one fastening or fixing of the flexible door with two ends where one end is attached to the upper part of the structure for lifting heavy weights and the other end is joined to the Free end of the door.

16. An apparatus for the tailgate for vehicles, characterized in that it comprises: a mounting structure adapted to be coupled to a vehicle; a rotary actuator having a body and a first exit bar and a second exit bar, wherein the body is attached to the mounting means; a beauty! b t t twist having a first end and a second end, wherein the first end of the first torsion bar is attached to the first exit bar; a second torsion bar having a first end and a second end, wherein the first end of the second torsion bar is joined to the second exit bar; a first articulated arm having a first end and a second end, wherein the first end of the first articulated arm is joined to the second end of the first torsion bar; a second articulated arm having a first end and a second end, wherein the first end of the second articulated arm is joined to the second end of the second torsion bar; and, a door having an articulated end and a free end and a first side and a second side wherein the articulated end on the first side joins rotatably to the second end of the first articulated arm and the articulated end and in the second side is rotatably joined to the second end of the second articulated arm.

17. The apparatus according to claim 16, characterized in that the rotary actuator is placed in the center of the mounting structure.

18. The apparatus according to claim 16, characterized in that the rotary actuator is an electromechanical actuator.

19. The apparatus according to claim 16, characterized in that the rotary actuator is a single paddle hydraulic actuator.

20. The apparatus according to claim 16, characterized in that the rotary actuator is a double-vane hydraulic actuator.