Gate lifting device for special purpose vehicle

Abstract

The present invention relates to a gate lifting device for special purpose vehicles, and more specifically, to a gate lifting device for special purpose vehicles in which the width of the bracket used in the gate lifting device for special purpose vehicles can be freely adjusted, the possibility of damage from external forces is low, and maintenance is easy. The present invention is technically characterized by a device for lifting a gate coupled to the rear of a cargo box of a special vehicle, comprising: a panel gate; a bridge having an open structure consisting of three sides, wherein the panel gate is hinge-coupled to the closed side; a bracket coupled to the lower rear end of the special vehicle, wherein both ends of the open side of the bridge are hinge-coupled to the bracket; and a plurality of hydraulic cylinders coupled to the bracket to rotate the panel gate and the bridge.

Description

Technology Field

[0001] The present invention relates to a gate lifting device for special purpose vehicles, and more specifically, to a gate lifting device for special purpose vehicles in which the width of the bracket used in the gate lifting device for special purpose vehicles can be freely adjusted, the possibility of damage from external forces is low, and maintenance is easy. Background Technology

[0002] The cargo gate applied to special-purpose vehicles is an essential component in the cargo loading and unloading process; it primarily rotates up and down at the rear end and assists workers by preventing loaded cargo from falling when raised and enabling unloaded cargo to be easily transported to the height of the cargo box.

[0003] For these special-purpose vehicles, the width and length of the cargo box may vary depending on the type of vehicle and the size of various loaded objects; accordingly, the panel gate may also be equipped with various widths.

[0004] Conventionally, a new lifting device had to be designed and manufactured every time according to these various widths, and even when the lifting device alone was to be reused due to vehicle accidents, the width was formed in a limited way, so it could not be applied at all and had to be discarded or disassembled and remade through re-welding, which was cumbersome.

[0005] Furthermore, conventional lifting devices feature a bracket attached to the underside of special-purpose vehicles that is formed as an integrated structure. Since this structure is a hollow frame, it was frequently damaged by external impacts, and chronic breakdowns and noise were caused by significant deformation due to load concentration.

[0006] Despite such damage, malfunction, and noise, the integrated bracket described above was difficult to maintain and custom-made, which resulted in increased manufacturing costs and presented the problem of very difficult maintenance and upkeep. Prior art literature

[0007] (Patent Document 0001) KR 10-1996800 B1(Patent Document 0002) KR 10-2102475 B1 The problem to be solved

[0008] The present invention was developed to resolve the aforementioned problems, and aims to provide a special vehicle gate lifting device that can be universally applied to special vehicle models of various widths, has a low possibility of damage, and is easy to maintain.

[0009] The objectives of the present invention are not limited to those mentioned above, and other unmentioned objectives will be clearly understood from the description below. means of solving the problem

[0010] The present invention, for achieving the above objective, has a special vehicle gate lifting device that is a device for lifting a gate coupled to the rear of a cargo box of a special vehicle, and is characterized by the following technical features: a panel gate; a bridge having an open structure consisting of three sides, wherein the panel gate is hinge-coupled to the closed side; a bracket coupled to the lower rear end of the special vehicle, wherein both ends of the open side of the bridge are hinge-coupled to each other; and a plurality of hydraulic cylinders coupled to the bracket to rotate the panel gate and the bridge.

[0011] In addition, the technical feature of the bracket is that it comprises a support member consisting of a horizontal bar arranged in the width direction of the special vehicle; and a connecting member formed at both ends of the support member, to which both ends of the open side of the bridge are connected.

[0012] In addition, the technical feature of the above-mentioned joint is that it is composed of a plurality of flat assemblies.

[0013] In addition, the technical feature of the above-described joint assembly is that it comprises: a horizontal attachment piece located at the innermost part of the joint and coupled to the support member; a vertical attachment piece located at the outermost part of the joint and coupled to the lower surface of the special vehicle; a stopper formed between the horizontal attachment piece and the vertical attachment piece, which contacts the bridge; a first support piece formed with a hinge hole through which a hinge shaft passes to allow the bridge to be coupled, and a first cylinder hole to which one of the plurality of hydraulic cylinders is coupled; a second support piece formed with a second cylinder hole to which another of the plurality of hydraulic cylinders is coupled; and a plurality of adjustment pieces coupled to allow the width of the joint assembly to be adjusted.

[0014] In addition, the technical feature of the above-mentioned knit assembly is that it can be combined and applied as needed. Effects of the invention

[0015] The present invention based on the above-described configuration can expect the following effects.

[0016] The bracket can be securely fixed to the lower rear end of the special vehicle, and this secure fixation enables smooth rotation of the panel gate and bridge, thereby allowing the loading and unloading to be carried out stably.

[0017] The bracket features a joint made of a flat assembly, allowing for flexible width adjustment and easy application to various models of special-purpose vehicles. Furthermore, from the perspective of the manufacturer supplying the device, standardizing the types of parts enables quality control of the gate lifting device, thereby bringing stability to business operations.

[0018] Each piece of the flat assembly has an individual function, and since the pieces can be combined and applied according to various situations, it can be applied very flexibly depending on the situation, such as when reinforcement of stiffness and strength is required or when width adjustment is needed.

[0019] Since the composition of the composite assembly consists of multiple pieces, maintenance can be managed by replacing some of the pieces, and even in situations such as scrapping a vehicle, the invention can be easily separated and applied universally, thereby increasing recyclability.

[0020] Since the joint is formed by the combination of pieces, manufacturability is improved, and vibration and noise can be reduced through properties that are resistant to breakage or deformation.

[0021] The reduction of such vibration and noise improves workability and stability during the lifting and lowering of loads, and ultimately can reduce the occurrence of safety accidents. Brief explanation of the drawing

[0022] FIG. 1 is a side view of a special vehicle gate lifting device according to a preferred embodiment of the present invention. FIG. 2 is a conceptual diagram showing the opening and closing of a gate lifting device for a special vehicle according to a preferred embodiment of the present invention. FIG. 3 is a diagram showing the configuration of a horizontal attachment piece according to a preferred embodiment of the present invention. FIG. 4 is a diagram showing the configuration of a vertical attachment piece according to a preferred embodiment of the present invention. FIG. 5 is a diagram showing the structure of a blocking piece according to a preferred embodiment of the present invention. FIG. 6 is a diagram showing the configuration of a first support piece according to a preferred embodiment of the present invention. FIG. 7 is a diagram showing the configuration of a second support piece according to a preferred embodiment of the present invention. FIG. 8 is a diagram showing the configuration of an adjustment piece according to a preferred embodiment of the present invention. FIG. 9 is a top view of a bracket according to a preferred embodiment of the present invention. FIG. 10 is a front view of a bracket according to a preferred embodiment of the present invention. FIG. 11 is a schematic diagram of a connecting part of a special vehicle gate lifting device according to a preferred embodiment of the present invention, viewed from an oblique angle. FIG. 12 is a schematic diagram of a joint portion of a special vehicle gate lifting device according to a preferred embodiment of the present invention, viewed from the front. FIG. 13 is a combined diagram of a bridge and a bracket of a special vehicle gate lifting device according to a preferred embodiment of the present invention. FIG. 14 is an exploded view of a coupling part in a special vehicle gate lifting device according to a preferred embodiment of the present invention. Specific details for implementing the invention

[0023] A gate lifting device for a special vehicle according to a preferred embodiment of the present invention will be described in detail below with reference to the attached drawings.

[0024] FIG. 1 is a side view of a special vehicle gate lifting device according to a preferred embodiment of the present invention; FIG. 2 is a conceptual diagram showing the opening and closing of a special vehicle gate lifting device according to a preferred embodiment of the present invention; FIG. 3 is a configuration diagram of a horizontal attachment piece according to a preferred embodiment of the present invention; FIG. 4 is a configuration diagram of a vertical attachment piece according to a preferred embodiment of the present invention; FIG. 5 is a configuration diagram of a blocking piece according to a preferred embodiment of the present invention; FIG. 6 is a configuration diagram of a first support piece according to a preferred embodiment of the present invention; FIG. 7 is a configuration diagram of a second support piece according to a preferred embodiment of the present invention; FIG. 8 is a configuration diagram of an adjustment piece according to a preferred embodiment of the present invention; FIG. 9 is a top view of a bracket according to a preferred embodiment of the present invention; FIG. 10 is a front view of a bracket according to a preferred embodiment of the present invention; FIG. 11 is a diagonal view of a coupling part of a special vehicle gate lifting device according to a preferred embodiment of the present invention. FIG. 12 is a schematic diagram of a joint portion of a special vehicle gate lifting device according to a preferred embodiment of the present invention viewed from the front, FIG. 13 is a joint diagram of a bridge and a bracket of a special vehicle gate lifting device according to a preferred embodiment of the present invention, and FIG. 14 is an exploded view of a joint portion of a special vehicle gate lifting device according to a preferred embodiment of the present invention.

[0026] A special vehicle gate lifting device according to a preferred embodiment of the present invention is largely composed of a panel gate (1000), a bridge (2000), a bracket (3000), and a hydraulic cylinder (4000).

[0028] First, let's look at the panel gate (1000) above.

[0029] The panel gate (1000) is installed at the rear of the cargo compartment of the special vehicle (10) and serves as an opening and closing door to prevent the cargo from falling out of the cargo compartment, and also serves to assist the worker in loading work by moving up and down relative to the cargo compartment.

[0030] To perform this loading assistance function, the panel gate (1000) may preferably be relatively larger than the size of a standard loading box opening / closing door, and may be made of a material with stronger corrosion resistance than ordinary steel so as not to be corroded by various loaded materials.

[0031] In addition, it may be desirable for the panel gate (1000) to have a non-slip treatment, such as forming etching or protrusions, so that the load does not slip out during the process of loading and lifting the load.

[0032] The panel gate (1000) can be in the form of a cantilever, in which one end is connected to the bridge (2000) described later when loading cargo, so that the allowable load can be selected according to the type of cargo so that it does not deform or break under the load of cargo.

[0033] The panel gate (1000) may be formed by combining multiple panels to provide variety and stability of the unfolding angle and to improve strength and rigidity when lifting after loading the cargo, and may further be equipped with a locking device (not shown) to prevent the panel gate (1000) from opening when the special vehicle (10) is in operation, and such structures are applied in various ways in the prior art, and various products used in the past may be selected and provided.

[0035] Next, we examine the above bridge (2000).

[0036] One side of the bridge (2000) is connected to the panel gate (1000), and the other side is connected to the bracket (3000) to be described later, so that as a result, the panel gate (1000) can maintain a stable state of being assembled to the special vehicle (10).

[0037] The bridge (2000) is a general term for a mechanism connecting the bracket (3000) and the tailgate, and while the bridge (2000) can be formed in various shapes, it may be preferable to have a 'C' shape, which is an open structure consisting of three sides.

[0038] In this open structure consisting of three sides, the panel gate (1000) can be connected to the side closed by the three sides.

[0039] The panel gate (1000) is hinge-connected to the bridge (2000), and when the bridge (2000) and the panel gate (1000) are raised and lowered by the hydraulic cylinder (4000) described later, the panel gate (1000) rotates around the hinge so that it can easily perform the role of raising to close the cargo box or lowering to raise and lower the cargo.

[0040] The bridge (2000) supports the load of the panel gate (1000) and must be firmly connected to the bracket (3000), while being made of a material with excellent strength and rigidity so as there is no direct contact with the load, and generally made of steel, but can be made as a single piece.

[0041] A panel gate coupling member (2100) that allows the panel gate (1000) to be hinge-coupled may be provided on the closed side of the bridge (2000), and it may be preferable for the panel gate coupling member (2100) to be separately attached to a structure of the bridge (2000) which is in the form of a bar.

[0042] The open side of the bridge (2000) may have two ends formed structurally, and at the ends, a shaft coupling member (2200) into which a hinge shaft (A) is inserted may be formed so as to be hinge-connected with a bracket (3000).

[0044] Next, we examine the bracket (3000).

[0045] One side of the bracket (3000) is fixed and supported on the lower part of the special vehicle (10), and the other side can support one end of the bridge (2000) described above and the hydraulic cylinder (4000) described later.

[0046] The bracket (3000) has these various components combined, so it may correspond to a structure that is actually subjected to and supported by the greatest load.

[0047] The bracket (3000) can be largely composed of a support part (3100) and a connecting part (3200).

[0048] The support member (3100) can stably maintain the structure of the entire bracket (3000) and, even under external force, the connecting members (3200) at both ends can maintain a gap and be stably connected to the special vehicle (10).

[0049] The support member (3100) is arranged in the width direction of the special vehicle (10) and can be formed in the shape of a horizontal bar.

[0050] Due to the provision of the support member (3100), the connecting member (3200) of the bridge (2000) can maintain a stable connection to the lower part of the special vehicle (10) while maintaining a gap even when a load is applied, and the load coming from the panel gate (1000) to the connecting member (3200) through the bridge (2000) can be distributed to the support member (3100) to enable stable support.

[0051] The support member (3100) is made of a material with high strength and rigidity, and can generally be made of a hollow rectangular column.

[0052] A connecting portion (3200) may be formed at both ends of the supporting portion (3100).

[0053] The joint portion (3200) may have both ends formed on the open side of the bridge (2000) described above hinge-connected, and the joint portion (3200) may collectively refer to the part to which the bridge (2000) is connected.

[0054] In the present invention, the connecting part (3200) may be composed of a piece assembly in which a plurality of pieces are joined.

[0055] The multiple pieces forming the composite assembly can be broadly classified into a horizontal attachment piece (3210), a vertical attachment piece (3220), a blocking piece (3230), a first support piece (3240), a second support piece (3250), and a adjusting piece (3260) by having different shapes.

[0056] The horizontal attachment piece (3210) is located at the innermost part of the joint part (3200) and can perform the function of connecting the entire piece assembly to the support part (3100).

[0057] In addition, the horizontal attachment piece (3210) has a hinge hole (B) formed therein through which a hinge shaft (A) can pass so that a bridge (2000) can be hinge-coupled therein, thereby allowing the connection of the hinge shaft (A) to be firmly formed when the bridge (2000) is coupled to the bracket (3000).

[0058] Unlike other pieces to be described later, the horizontal attachment piece (3210) may preferably be integrally connected to the support member (3100), and in detail, a horizontal connection area (3210) on one side may be connected to the support member (3100) by metal welding to form a strong connection.

[0059] The shape of the horizontal attachment piece (3210) can be any shape, but it can be formed in a shape where the horizontal length is longer than the vertical length so that the central axis of the support part (3100) and the central axis of the joint assembly (3200) do not coincide, and are horizontally spaced apart from the support part (3100).

[0060] To explain in detail, the horizontal attachment piece (3210) is formed in a shape that is relatively long in the horizontal direction, so that the horizontal connection area (3210), which is on one side with respect to the center in the horizontal direction, is welded to the support member (3100), and the other side is formed in a shape that is spaced apart from the support member (3100).

[0061] At this time, the pieces to be described later are joined around the portion spaced apart from the support portion (3100), and for this joining, a plurality of bolt fastening holes (D) through which a bolt (C) for joining the flat assembly passes may be formed.

[0062] The vertical attachment piece (3220) can be located at the outermost point furthest apart from the horizontal attachment piece (3210) in the joint part (3200) and can serve to be attached to and supported on the lower surface of the special vehicle (10).

[0063] Since the bracket (3000) can be supported on the special vehicle (10) by the vertical attachment piece (3220), it may be desirable for the vertical attachment piece (3220) to also be joined to the lower surface of the special vehicle (10) by metal welding for strong support.

[0064] The vertical attachment piece (3220) can be formed in a relatively long shape in the vertical direction so that the joint assembly (3200) can be spaced apart from the special vehicle (10), and in order for the vertical attachment piece (3220) to be strongly connected to the lower part of the special vehicle (10), the vertical connection area (3221), which is the uppermost part of the vertical attachment piece (3220), can have a very long shape in the horizontal direction to maximize the welding surface.

[0065] Due to these morphological characteristics, the vertical attachment piece (3220) can have a trapezoidal shape formed on its upper side, with the upper side being long.

[0066] In the lower part of the trapezoidal shape, a bolt fastening hole (D) through which a bolt (C) for joining the flat assembly passes can be formed in the same arrangement as that formed in the horizontal attachment piece (3210).

[0067] Pieces capable of performing various functions may be placed between the horizontal attachment piece (3210) and the vertical attachment piece (3220).

[0068] The stopper portion (3230) may have a stopper area (3231) formed therein, which is formed by a stopper protruding from one side of the center where the piece assembly is joined.

[0069] The stopper area (3231) is located on the rotational surface of the rotating bridge (2000), and when the bridge (2000) rotates, the bridge (2000) comes into contact with the stopper area (3231), thereby preventing the rotation of the bridge (2000).

[0070] In detail, the stopper area (3231) has a protruding shape having an upward inclined line, so that the bridge (2000) rotating and rising from the bottom can make surface contact with the inclined line, thereby preventing the rotation of the bridge (2000).

[0071] In order to perform this role, the stopper (3230) must be positioned to fit the width of the bridge (2000) so that it can come into contact with the bridge (2000) even if the width of the bracket (3000) is adjusted by the adjustment piece (3260) described later.

[0072] The first support piece (3240) has a hinge hole (B) formed therein through which the bridge (2000) can be hinge-coupled to the coupling part (3200), and a first cylinder hole (3241) formed at the bottom to which any one of the plurality of hydraulic cylinders (4000) to be described later is coupled may be formed.

[0073] Generally, multiple first support pieces (3240) may be provided so that strong support can be achieved, and they may be spaced apart or overlapped, but they are generally spaced apart so that a space is formed so that a hydraulic cylinder (4000) can be hinge-connected.

[0074] Another hydraulic cylinder (4000) to be described later can be connected by a second support piece (3250).

[0075] Unlike the first support piece (3240), the second support piece (3250) is not connected to a hinge shaft (A), so only a second cylinder hole (3251) can be formed without a hinge hole (B), and thus can have a shape that is distinct from the first support piece (3240).

[0076] The second support piece (3250) can also be formed with a plurality of spaced-apart pieces so that the remaining hydraulic cylinder (4000) can be hinge-connected.

[0077] The knit assembly may basically be equipped with the aforementioned horizontal attachment piece (3210), vertical attachment piece (3220), stopper piece (3230), first support piece (3240), and second support piece (3250), and the width adjustment of the entire knit assembly may be achieved by the adjustment piece (3260).

[0078] The adjusting piece (3260) may have a shape that is relatively smaller than the horizontal attachment piece (3210), vertical attachment piece (3220), stopping piece (3230), first support piece (3240), and second support piece (3250), and in detail, may have only a minimum area sufficient to accommodate a bolt fastening hole (D) into which a bolt (C) for connecting the piece assembly is attached.

[0079] The adjusting piece (3260) can be combined in multiple numbers, and each piece constituting the above-described piece assembly can be combined and applied as needed, and the adjusting piece (3260) can be flexibly arranged to adjust the spacing between each piece and to facilitate the connection between the pieces.

[0080] Additionally, while it is desirable for the horizontal attachment piece (3210), vertical attachment piece (3220), stop piece (3230), first support piece (3240), and second support piece (3250) to have the same thickness to improve manufacturability, the adjustment piece (3260) can have various thicknesses so that it can have the thickness of the assembly, which is the most suitable coupling part (3200) for the model of the special vehicle (10) having various widths.

[0081] The horizontal attachment piece (3210), vertical attachment piece (3220), stop piece (3230), first support piece (3240), second support piece (3250), and adjustment piece (3260) can all be firmly fixed by bolts (C) for connecting the assembly, and bolt fastening holes (D) can be formed in the same arrangement in all pieces so that the bolts (C) for connecting the assembly can pass through.

[0083] Finally, we examine the hydraulic cylinder (4000).

[0084] A hydraulic cylinder (4000) serves to raise and lower the bridge (2000) and the panel gate (1000), and can be formed in multiple numbers and connected to the bracket (3000).

[0085] That is, the hydraulic cylinder (4000) may be composed of multiple units, including one group which is connected to the bracket (3000) at one end and connected to the panel gate (1000) at the other end, and two groups which are connected to the bracket (3000) at one end and connected to the bridge (2000) at the other end, and each group may be formed on both sides.

[0086] A hydraulic cylinder (4000) of group 1 or group 2 can be installed on either the first support piece (3240) or the second support piece (3250) described above, and can be arranged so as not to be mixed, such that when group 1 is connected to the first support piece (3240), group 2 is connected to the second support piece (3250).

[0088] The above-described embodiments are merely exemplary, and various other modified embodiments are possible therefrom for those skilled in the art.

[0089] Therefore, the true technical scope of protection of the present invention must include not only the above embodiments but also other embodiments that are variously modified according to the technical concept of the invention described in the following claims. Explanation of the symbols

[0090] 10: Special purpose vehicles 1000: Panel Gate 2000: Bridge 2100: Panel gate coupling 2200: Shaft coupling 3000: Bracket 3100: Support 3200: Joint 3210: Horizontal attachment piece 3211: Horizontal connection area 3220: Vertical attachment piece 3221: Vertical connection area 3230: Jersey Part 3231: Stopper area 3240: First Earth Branch 3241: 1st cylinder hole 3250: Second Earth Branch 3251: Second cylinder hole 3260: Adjustment section 4000: Hydraulic cylinder A: Hinge axis B: Hinge hole C: Bolt for joining flat assemblies D: Bolt fastening hole

Claims

Claim 1 A special vehicle gate lifting device comprising: a panel gate; a bridge having an open structure consisting of three sides, wherein the panel gate is hinge-connected to the closed side; a bracket, wherein both ends of the open side of the bridge are hinge-connected to the lower rear end of the special vehicle; a plurality of hydraulic cylinders connected to the bracket to rotate the panel gate and the bridge, wherein the bracket comprises a support member consisting of a horizontal bar arranged in the width direction of the special vehicle; and a connecting member formed at both ends of the support member, wherein both ends of the open side of the bridge are connected to the connecting member and formed of a plurality of flat assemblies. Claim 2 delete Claim 3 delete Claim 4 A special vehicle gate lifting device according to claim 1, wherein the flat assembly comprises: a horizontal attachment piece located at the innermost edge of the coupling part and coupled to the support part; a vertical attachment piece located at the outermost edge of the coupling part and coupled to the lower surface of the special vehicle; a stopping piece located between the horizontal attachment piece and the vertical attachment piece and having a stopper formed therein that contacts the bridge; a first support piece having a hinge hole through which a hinge shaft passes to allow the bridge to be coupled, and a first cylinder hole formed therein to which one of the plurality of hydraulic cylinders is coupled; a second support piece having a second cylinder hole formed therein to which another of the plurality of hydraulic cylinders is coupled; and a plurality of adjusting pieces coupled thereto to allow the width of the flat assembly to be adjusted. Claim 5 A special vehicle gate lifting device characterized in that, in paragraph 4, the above-mentioned single assembly can be combined and applied as needed.

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