A multifunctional lowering mechanism

Abstract

The present invention relates to a traction mechanism, and in particular to a multifunctional lowering mechanism. It includes a swing frame, a swing driving mechanism, a fixed pulley, a hydraulic winch, a hook assembly and a steel wire rope, wherein the swing driving mechanism and the hydraulic winch are arranged on a chassis; the bottom of the swing frame is hinged to the chassis, and a fixed pulley is arranged on the top; one end of the steel wire rope is wound on the hydraulic winch, and the other end is connected to the hook assembly through the fixed pulley; the output end of the swing driving mechanism is connected to the swing frame to drive the swing frame to swing. The present invention integrates traction, tires, and toolbox unloading into one mechanism within a limited space, wherein the traction function can not only tow other trapped vehicles, but also realize self-rescue when the vehicle itself has an accident such as tilting, etc., the operation is simple, and human resources and time costs are saved.

Description

Technical Field

[0001] The invention relates to a traction mechanism, in particular to a multifunctional lowering mechanism. Background Art

[0002] For heavy-loaded combination platforms with a full load weight of hundreds of tons, traction is mostly done by a winch on the vehicle chassis. The problems are low traction capacity and single function. The traction capacity of heavy-loaded hundred-ton vehicles is limited. At the same time, there are requirements for traction conditions, and the heavy traction structure occupies a large space in the entire vehicle.

[0003] Based on the above situation, there is an urgent need for a multifunctional traction mechanism that can solve the problems of low traction capacity and single function of existing heavy-duty vehicles, so as to improve work efficiency and space utilization. Summary of the invention

[0004] In view of the above problems, the object of the present invention is to provide a multifunctional lowering mechanism to solve the problems of low traction capacity and single function of existing heavy-load vehicles.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A multifunctional lowering mechanism comprises a swing frame, a swing drive mechanism, a fixed pulley, a hydraulic winch, a hook assembly and a steel wire rope, wherein the swing drive mechanism and the hydraulic winch are arranged on a chassis; the bottom of the swing frame is hinged to the chassis, and a fixed pulley is provided on the top; one end of the steel wire rope is wound around the hydraulic winch, and the other end is connected to the hook assembly through the fixed pulley; the output end of the swing drive mechanism is connected to the swing frame for driving the swing frame to swing.

[0007] The hook assembly comprises a hook and a movable pulley arranged on the hook; the other end of the steel wire rope passes through the movable pulley and is connected to the top of the swing frame.

[0008] A rope-blocking wheel located at one side of the fixed pulley is provided on the top of the swing frame, and the other end of the steel wire rope is connected to the rope-blocking wheel.

[0009] The swing driving mechanism includes a swing hydraulic cylinder, a small connecting rod and a large connecting rod, wherein one end of the large connecting rod is hinged to the chassis, and the other end is hinged to one end of the small connecting rod, and the other end of the small connecting rod is hinged to the swing frame; the swing hydraulic cylinder is hinged on the chassis, and the output end is hinged to the other end of the large connecting rod.

[0010] Auxiliary hanging points and tire lowering mechanisms are respectively arranged on both sides of the swing frame, wherein the auxiliary hanging points are arranged at the top of the swing frame; the tire lowering mechanism is arranged at the middle position of the swing frame for carrying tires.

[0011] The tire lowering mechanism includes a fixed seat, a tire support frame, a cylinder and a guide rod, wherein the fixed seat is connected to the swing frame, the cylinder is arranged on the fixed seat, and the output end is connected to the tire support frame; the tire support frame is slidably connected to the fixed seat through the guide rod.

[0012] The tire support frame is an L-shaped structure, the bottom of which is connected to the output end of the cylinder, and the side surface is used to install the tire.

[0013] The tire support frame is positioned and connected to the fixing seat via a quick-pull pin.

[0014] A support seat is arranged on the chassis, and the bottom of the swing frame is rotatably connected to the support seat.

[0015] The advantages and beneficial effects of the present invention are as follows: the present invention provides a multifunctional lowering mechanism to address the practical problems of low traction capacity, single function and large space occupation of the heavy traction structure of existing heavy-load vehicles.

[0016] The structural member of the present invention adopts boom structural steel, has strong rigidity, compact structure, light weight, high reliability and large traction force.

[0017] The present invention integrates the traction, tire and tool box into one mechanism within a limited space, wherein the traction function can not only tow other trapped vehicles, but also realize self-rescue when the vehicle itself has accidents such as rollover, etc., the operation is simple, and human resources and time costs are saved.

[0018] The invention is suitable for heavy-duty transfer vehicles with limited space and traction capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a multifunctional lowering mechanism of the present invention;

[0020] Figure 2 for Figure 1 Left view of

[0021] Figure 3 It is a structural schematic diagram of the tire lowering mechanism in the present invention;

[0022] Figure 4 for Figure 3 A top view of

[0023] Figure 5 It is a schematic diagram of the unfolded state of a multifunctional lowering mechanism of the present invention;

[0024] Figure 6 for Figure 5 Left view of

[0025] Figure 7A schematic diagram of the mutual rescue function of the present invention;

[0026] Figure 8 for Figure 7 A top view of

[0027] Fig. 9 is a force diagram of the rescued vehicle in the present invention;

[0028] Fig.10 is a curve diagram of drag force and slope under the mutual rescue working condition of the present invention;

[0029] Fig.11 is a curve diagram of eccentric load force and slope under the mutual rescue working condition of the present invention;

[0030] Fig.12 is a curve diagram of the eccentric load angle and the eccentric load force under the mutual rescue working condition of the present invention;

[0031] Fig.13 It is a schematic diagram of the self-rescue function of the present invention;

[0032] Fig.14 for Fig.13 A top view of

[0033] Fig.15 It is a curve diagram of drag force and slope under the self-rescue working condition of the present invention;

[0034] Fig.16 It is a curve diagram of eccentric load force and slope under the self-rescue working condition of the present invention;

[0035] Fig.17 It is a curve diagram of the eccentric load angle and the eccentric load force under the self-rescue working condition of the present invention.

[0036] In the figure: 1, rope wheel; 2, swing frame; 3, fixed pulley; 4, swing hydraulic cylinder; 5, hydraulic winch; 6, support seat; 7, small connecting rod; 8, large connecting rod; 9, auxiliary lifting point; 10, hook; 11, tire lowering mechanism; 111, fixed seat; 112, tire support frame; 113, cylinder; 114, guide rod; 115, quick pull pin; 12, wire rope; 13, tire; 14, chassis; 15, movable pulley; F, axial load bearing capacity of fixed pulley; T, drag force; F 偏 , eccentric load force; θ, eccentric load angle; α, slope. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] like Figure 1-2As shown, the present invention provides a multifunctional lowering mechanism, comprising a swing frame 2, a swing driving mechanism, a fixed pulley 3, a hydraulic winch 5, a hook assembly and a steel wire rope 12, wherein the swing driving mechanism and the hydraulic winch 5 are arranged on a chassis 14; the bottom of the swing frame 2 is hinged to the chassis 14, and a fixed pulley 3 is provided on the top; one end of the steel wire rope 12 is wound around the hydraulic winch 5, and the other end is connected to the hook assembly through the fixed pulley 3; the output end of the swing driving mechanism is connected to the swing frame 2 for driving the swing frame 2 to swing.

[0039] In the embodiment of the present invention, the swing driving mechanism includes a swing hydraulic cylinder 4, a small connecting rod 7 and a large connecting rod 8, wherein one end of the large connecting rod 8 is hinged to the chassis 14, and the other end is hinged to one end of the small connecting rod 7, and the other end of the small connecting rod 7 is hinged to the swing frame 2; the swing hydraulic cylinder 4 is hinged to the chassis 14, and the output end is hinged to the other end of the large connecting rod 8. The swing hydraulic cylinder 4 drives the large connecting rod 8 to swing, and the large connecting rod 8 drives the swing frame 2 to swing through the small connecting rod 7.

[0040] like Figure 2 As shown, in the embodiment of the present invention, the hook assembly includes a hook 10 and a movable pulley 15 arranged on the hook 10; the other end of the wire rope 12 passes through the movable pulley 15 and is connected to the top of the swing frame 2.

[0041] like Figure 1 As shown, in the embodiment of the present invention, the top of the swing frame 2 is provided with a rope-stopping wheel 1 located on one side of the fixed pulley 3, and the rope-stopping wheel 1 is used to fix the end of the wire rope 12. Specifically, the rope-stopping wheel 1 and a plurality of fixed pulleys 3 are coaxially mounted on the top of the swing frame 2, and a plurality of movable pulleys 15 are coaxially mounted on the end of the hook 10. The wire rope 12 passes through the first fixed pulley and the first movable pulley in sequence, and then passes through the second fixed pulley, the second movable pulley, and so on, until it reaches the last movable pulley. The wire rope 12 is led out from the last movable pulley and connected and fixed to the rope-stopping wheel 1.

[0042] like Figure 2 As shown, on the basis of the above embodiment, auxiliary hanging points 9 and tire lowering mechanisms 11 are respectively provided on both sides of the swing frame 2, wherein the auxiliary hanging point 9 is arranged at the top of one side of the swing frame 2; the tire lowering mechanism 11 is arranged at the middle position of the other side of the swing frame 2, for carrying the tire 13.

[0043] like Figure 3-4 As shown, in an embodiment of the present invention, the tire lowering mechanism 11 includes a fixed seat 111, a tire support frame 112, a cylinder 113 and a guide rod 114, wherein the fixed seat 111 is connected to the swing frame 2, the cylinder 113 is arranged on the fixed seat 111, and the output end is connected to the tire support frame 112; the tire support frame 112 is slidably connected to the fixed seat 111 through the guide rod 114.

[0044] Specifically, in this embodiment, the tire support frame 112 is an L-shaped structure, the bottom of which is connected to the output end of the cylinder 113, and the side is used to install the tire 13. When the swing frame 2 is in a horizontal state, the cylinder 113 drives the tire support frame 112 to move downward to achieve the bottom of the tire 13.

[0045] Furthermore, the tire support frame 112 is positioned and connected to the fixing seat 111 via a quick-release pin 115 .

[0046] In the embodiment of the present invention, a support base 6 is provided on the chassis 14 , and the bottom of the swing frame 2 is rotatably connected to the support base 6 .

[0047] The present invention provides a multifunctional lowering mechanism for use on heavy vehicles, which is divided into four functions, namely, self-rescue function, mutual rescue function, tire lowering function and toolbox lowering function. The support seat 6 and the hydraulic winch 5 are fixedly connected to the chassis 14, the support seat 6 is arranged at the rear of the vehicle, and the swing frame 2 is hinged to the support seat 6. The support seat 6 serves as the rotation axis of the swing frame 2, and the swing frame 2 is used to increase the overall traction distance and traction force. The small connecting rod 7, the large connecting rod 8 and the swing hydraulic cylinder form a swing driving mechanism to make the swing frame 2 rotate. The hydraulic winch 5 provides a power source for traction, and the fixed pulley 3 can amplify the traction capacity of the hydraulic winch 5. The auxiliary lifting point 9 is used for the tools and spare parts box on the transporter, and the tire lowering mechanism 11 is used for the transportation and fixation of the tire 13.

[0048] During the accident rescue process, in order to pull out the trapped vehicle, since the road conditions at the accident site are relatively complicated, the towed vehicle and the swing frame 2 may form a certain angle. Therefore, the swing hydraulic cylinder 4 that drives the swing frame 2 is designed with a swing function, that is, the swing hydraulic cylinder 4 becomes a damping body and will change with the change of the external load angle. During the towing process, the entire mechanism can follow the ups and downs of the road surface, and the entire mechanism becomes a flexible structure to avoid excessive stress on the structure and cause damage to the mechanism.

[0049] In the embodiment of the present invention, the multifunctional self-rescue and mutual-rescue lowering mechanism has a total weight of 840 kg, a traction capacity of 45 t, a traction distance of 10 m, a tire deadweight of 220 kg, a 6-fold pulley block, and a winch pulling capacity of 7 t.

[0050] The invention provides a multifunctional lowering mechanism, which integrates the traction function with the removal of spare tires, tool boxes and spare accessories. The structural parts of the invention adopt arm structure steel, which has strong rigidity, compact structure, light weight, high reliability and large traction.

[0051] The advantage of the present invention is that in a limited space, the traction, tires, and tool box are integrated into one mechanism, wherein the traction function can not only tow other trapped vehicles, but also realize self-rescue when the vehicle itself has an accident such as rollover, etc., the operation is simple, and human resources and time costs are saved. Therefore, the present invention is suitable for heavy-duty relocation vehicles with limited space and traction capacity.

[0052] The present invention provides a multifunctional lowering mechanism, and its specific implementation process is as follows:

[0053] Tire lowering function: Figure 1 , Figure 3 As shown, the manually operated swing hydraulic cylinder 4 is extended, driving the small connecting rod 7 and the large connecting rod 8 to drive the swing frame 2 to rotate 120° around the support seat 6, and at the same time, the hydraulic winch 5 is operated to rotate and release the wire rope 12. When the hook 10 is lowered as the swing frame 2, since the tire lowering mechanism 11 is installed on the swing frame 2, the tire 13 is lowered with the mechanism. The operator connects the air source on the vehicle with the air pipe of the mechanism, and then removes the quick-pull pin 15 to release the mechanical limit. The operator turns on the air circuit switch to make the cylinder 113 drive the tire lowering mechanism 11 to descend, and the tire 13 falls to the ground. Then the operator removes the bolts fixed on the fixing seat 111, and the tire 13 is unloaded, saving manpower and improving efficiency.

[0054] Tool and accessory box lowering function: Before operating the tool and accessory box lowering function, hang a manual hoist on the auxiliary lifting point 9, tie the box to be moved with a sling, and then the operator hangs the sling on the hook of the manual hoist. At the same time, the crossbeam on the auxiliary lifting point 9 can be moved horizontally when the distance is far or it is inconvenient to hang, which is convenient for personnel to operate and saves time and effort. Then follow the operating sequence of the tire lowering function to get the box off the car. In the process of getting the box off the car, in order to prevent the box from shaking, the operator participates in holding the box and gets off the car slowly. The swing frame 2 can also stop at any angle within the range of 120°, which is convenient for boxes of different shapes to get off the car, saving manpower and improving efficiency.

[0055] Mutual rescue function: Figure 7-8 As shown, the swing hydraulic cylinder 4 is manually operated to extend the belt, and the small connecting rod 7 and the large connecting rod 8 drive the swing frame 2 to rotate 120° around the support seat 6. At the same time, the hydraulic winch 5 is operated to rotate and release the wire rope 12, and the hook 10 is lowered. The operator connects the hook 10 to the accident vehicle with a sling. Figure 8 As shown, in the entire swing frame 2, only the axial load bearing capacity F of the fixed pulley is poor, and the axial load bearing capacity F of the fixed pulley is 5% of the radial load bearing capacity. In the pulley design, each pulley is required to be able to withstand a tensile force of 16t under axial load, so the axial load bearing capacity = 5% × 16 = 0.8 (t).

[0056]

[0057] Where -θ is the eccentric load angle

[0058] F is the axial load bearing capacity of the pulley

[0059] T is the drag force

[0060]

[0061] like Fig. 9 As shown in the figure, during the towing process, due to the complex road conditions at the accident site, there are two types of towing: slope road and flat road towing. Therefore, the towing range is mainly divided into two categories, and the rescue range is mainly divided into two categories. The first category is small slope rescue, that is, Fig.10 As shown, Fig.10 The shaded area in ① is characterized by the rescued vehicle having an accident on a slope of 0-17.6%, the rescue vehicle is on a horizontal road, the direction of the dragging wire rope 12 has a certain angle with the ground of the rescue vehicle, and the angle θ of the load can be offset is 0-3.51°. If the slope exceeds the range, a large slope rescue method is used for rescue; the second type is large slope rescue, that is, Fig.10 As shown, Fig.10 The shaded area in ② is characterized by the rescued vehicle having an accident on a slope of 19.4-41.3%, the rescue vehicle is on a horizontal road, the direction of the dragging wire rope 12 is always kept horizontal with the rescue vehicle, and the angle of the load can be eccentric at 0.95-1.86°. If it cannot be kept horizontal or the force direction is biased downward, rescue is impossible. Figure 10-11 As shown in the figure, the shaded area is the mutual rescue range, beyond which rescue cannot be carried out, the drag force T and the eccentric load force F 偏 Increases with the increase of slope; Fig.12 As shown, the eccentric load F 偏 It decreases with the increase of the eccentric load angle.

[0062] Self-rescue function: Figure 13-14 As shown, the lowering process of the swing frame 2 is the same as the mutual rescue function. After the hook 10 is lowered, the operator uses the surrounding natural environment to tie the hook 10 to the surrounding solid trees or mountains with a sling. Due to the complex road conditions at the accident site, the rescue scope is mainly divided into two categories. The first category is small slope rescue, that is, Fig.15 As shown, Fig.15 The shaded area of ​​① is characterized by the rescued vehicle having an accident on a slope of 0-17.6%. The rescue vehicle is on a horizontal road, and the direction of the dragging wire rope 12 has a certain angle with the ground of the rescue vehicle. During the dragging process, the load can be offset by a certain angle, which ranges from 0-5.39°. If the slope exceeds the range, a large slope rescue method is used for rescue; the second type is large slope rescue, that is, Fig.15The shaded area in ② is characterized by the rescued vehicle having an accident on a slope of 24.9-60.3%, and the rescue vehicle is on a horizontal road. The direction of the dragging wire rope 12 is always kept horizontal with the ground of the rescue vehicle. Similar to the small slope rescue process, large slope rescue also allows for an offset angle, which ranges from 1.22-2.41°. If it cannot be kept horizontal or the force direction is biased downward, rescue is impossible. The shaded area is the self-rescue range, and rescue cannot be carried out beyond this range. Figure 15-16 As shown, the drag force T and the eccentric force F 偏 Increases with the increase of slope; Fig.17 As shown, the eccentric load F 偏 It decreases as the eccentric load angle θ increases.

[0063] The present invention is suitable for heavy-duty transfer vehicles with limited space and traction capacity. In the limited space, the traction, tires and tool box can be unloaded and assembled into one mechanism, wherein the traction function can not only tow other trapped vehicles, but also realize self-rescue when the vehicle itself has accidents such as rollover. The operation is simple, and human resources and time costs are saved.

[0064] The above description is only an embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A multifunctional lowering mechanism, characterized in that: The invention comprises a swing frame (2), a swing drive mechanism, a fixed pulley (3), a hydraulic winch (5), a hook assembly and a steel wire rope (12), wherein the swing drive mechanism and the hydraulic winch (5) are arranged on a chassis (14); the bottom of the swing frame (2) is hinged to the chassis (14), and the top is provided with a fixed pulley (3); one end of the steel wire rope (12) is wound around the hydraulic winch (5), and the other end is connected to the hook assembly through the fixed pulley (3); the output end of the swing drive mechanism is connected to the swing frame (2) for driving the swing frame (2) to swing; The swing drive mechanism comprises a swing hydraulic cylinder (4), a small connecting rod (7) and a large connecting rod (8), wherein one end of the large connecting rod (8) is hinged to the chassis (14), and the other end is hinged to one end of the small connecting rod (7), and the other end of the small connecting rod (7) is hinged to the swing frame (2); the swing hydraulic cylinder (4) is hinged to the chassis (14), and the output end is hinged to the other end of the large connecting rod (8); An auxiliary hanging point (9) and a tire lowering mechanism (11) are respectively provided on both sides of the swing frame (2), wherein the auxiliary hanging point (9) is arranged at the top of the swing frame (2); the tire lowering mechanism (11) is arranged at the middle position of the swing frame (2) and is used to carry the tire (13); The tire lowering mechanism (11) comprises a fixed seat (111), a tire support frame (112), a cylinder (113) and a guide rod (114), wherein the fixed seat (111) is connected to the swing frame (2), the cylinder (113) is arranged on the fixed seat (111), and the output end is connected to the tire support frame (112); the tire support frame (112) is slidably connected to the fixed seat (111) via the guide rod (114); A support seat (6) is provided on the chassis (14), and the bottom of the swing frame (2) is rotatably connected to the support seat (6).

2. The multifunctional lowering mechanism according to claim 1, characterized in that: The hook assembly comprises a hook (10) and a movable pulley (15) arranged on the hook (10); the other end of the steel wire rope (12) passes through the movable pulley (15) and is connected to the top of the swing frame (2).

3. The multifunctional lowering mechanism according to claim 2, characterized in that: A rope-blocking wheel (1) is provided on the top of the swing frame (2) and is located on one side of the fixed pulley (3); the other end of the steel wire rope (12) is connected to the rope-blocking wheel (1).

4. The multifunctional lowering mechanism according to claim 1, characterized in that: The tire support frame (112) is an L-shaped structure, the bottom of which is connected to the output end of the cylinder (113), and the side surface is used to mount the tire (13).

5. The multifunctional lowering mechanism according to claim 1, characterized in that: The tire support frame (112) is positioned and connected to the fixing seat (111) via a quick-release pin (115).

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