An active steering mechanism for a flatbed trailer

Abstract

The present invention provides an active steering mechanism for a flatbed trailer, which includes a bearing turntable assembly, a first swing arm assembly, a rotating rod assembly, a second swing arm assembly, a turntable, a bogie assembly and wheels. This mechanism fully considers the practicability and reliability of the steering mechanism, optimizes each component, and can accurately control the steering direction, steering angle and steering force of the flatbed trailer. The active steering mechanism consists of two turntables with smaller tonnages to form two gear trains. The two gear trains are connected to the intermediate steering drawbar through a planar link assembly. When the intermediate drawbar steers, the steering force, steering angle and direction of the drawbar are transmitted to the two end gear trains through the planar link mechanism, thereby realizing the steering of the flatbed trailer. This steering mechanism is an active steering mechanism that can control the steering angle of the wheels, and has the characteristics of flexible steering, high load capacity, uniform and stable force on the flatbed trailer, simple structure, accurate steering, small structural stress and high reliability.

Description

Technical Field

[0001] The present invention belongs to the technical field of special vehicles, and particularly relates to an active steering mechanism for a flatbed trailer capable of controlling vehicle steering. Background Art

[0002] The steering mechanisms of flatbed trailers generally include two types. One type has fixed rear wheels and multiple sets of universal wheels at the front. This mechanism has a simple design and belongs to a passive steering mechanism. During travel, the direction is not easy to control and it is prone to jamming. The other type uses only a large-tonnage turntable. There is a long shaft under the turntable, and there is a set of wheels at each end of the long shaft. This mechanism can control the steering of the wheels, but the disadvantage is that the load-bearing capacity of the long shaft is required to be high enough. For flatbed trailers with a relatively large width and high load requirements, the weakness of the long shaft is obvious. Summary of the Invention

[0003] (I) Technical Problems to be Solved

[0004] The present invention provides an active steering mechanism for a flatbed trailer to solve the technical problems existing in the existing steering mechanisms of flatbed trailers.

[0005] (II) Technical Solutions

[0006] To solve the above technical problems, the present invention provides an active steering mechanism for a flatbed trailer, which includes a bearing turntable assembly, a first swing arm assembly, a rod assembly, a second swing arm assembly, a turntable, a bogie assembly and wheels; wherein,

[0007] The bearing turntable assembly includes a bearing pressure plate, tapered roller bearings, a bearing shaft, a bearing outer sleeve, a bearing rotating plate and a pull arm; wherein, the upper and lower ends of the bearing shaft are respectively inlaid with bearing pressure plates through square holes. The tapered roller bearings are sleeved on the outside of the bearing shaft and located between the upper and lower bearing pressure plates. The bearing outer sleeve is sleeved on the outside of the tapered roller bearings. Two sets of bearing rotating plates opposite in position are fixedly connected to the outer wall of the bearing outer sleeve. The outer end of each set of bearing rotating plates is fixedly connected with two parallel pull arms perpendicular to the bearing rotating plates;

[0008] The first swing arm assembly includes a first swing arm seat, a first square steel, a second swing arm seat, a second square steel and a third swing arm seat; wherein, the first swing arm seat 1 is connected to the bearing rotating plate of the bearing turntable assembly by bolts. The second swing arm seat is connected to the first swing arm seat by the first square steel. The third swing arm seat is connected to the second swing arm seat by the second square steel, and the first square steel and the second square steel are perpendicular to each other;

[0009] The rod assembly includes a left-handed ball head pin, a rod and a right-handed ball head pin; wherein, the left-handed ball head pin and the right-handed ball head pin are respectively installed at the left and right ends of the rod;

[0010] The second swing arm assembly includes a rotating shaft sleeve, a third-party steel bar, and a hinge; wherein, the rotating shaft sleeve and the hinge are respectively installed at the front and rear ends of the third-party steel bar;

[0011] The bogie assembly includes a turntable support frame, a front wheel support frame, a wheel axle wheel groove, and a wheel axle sleeve; wherein, by using the through hole of the turntable and the turntable support frame, the turntable that can rotate freely is installed on the upper plane of the turntable support frame with bolts, and the upper end of the turntable is fixed on the frame of the flatbed trailer; the lower end of the turntable support frame is fixedly connected with the front wheel support frame, the lower end of the front wheel support frame is fixedly connected with the wheel axle wheel groove, the longitudinal sleeve of the wheel axle wheel groove is connected with the rotating shaft sleeve of the second swing arm assembly, a wheel axle sleeve is fixed in the transverse wheel groove of the wheel axle wheel groove, a tire axle passes through the central hole of the wheel axle sleeve, and wheels are installed on the tire axle;

[0012] Both sides of the third swing arm seat are respectively connected with the left-handed ball head pin of a rod assembly and the right-handed ball head pin of another rod assembly; the right-handed ball head pins and left-handed ball head pins of the two rod assemblies are respectively connected with the hinge of a second swing arm assembly, and the screw rods of the ball head pins rotate inside the rod; the rotating shaft of the second swing arm assembly is fixedly connected with the wheel axle wheel groove of the bogie assembly through a pin shaft.

[0013] Further, the first swing arm assembly is welded by a first swing arm seat, a first square steel bar, a second swing arm seat, a second square steel bar, and a third swing arm seat.

[0014] Further, the second swing arm assembly is welded by a rotating shaft sleeve, a third-party steel bar, and a hinge.

[0015] Further, the bogie assembly is welded by a turntable support frame, a front wheel support frame, a wheel axle wheel groove, and a wheel axle sleeve.

[0016] Further, a first reinforcing plate is welded between the wheel axle wheel groove and the front wheel support frame.

[0017] Further, a second reinforcing plate is welded between the front wheel support frame and the turntable support frame.

[0018] (III) Beneficial effects

[0019] The present invention provides an active steering mechanism for a flatbed trailer, which includes a bearing turntable assembly, a first swing arm assembly, a rotating rod assembly, a second swing arm assembly, a turntable, a bogie assembly and wheels. This mechanism fully considers the practicability and reliability of the steering mechanism, optimizes each component, and can accurately control the steering direction, steering angle and steering force of the flatbed trailer. The active steering mechanism consists of two turntables with smaller tonnages to form two gear trains. The two gear trains are connected to an intermediate steering drawbar through a planar link assembly. When the intermediate drawbar steers, the steering force, steering angle and direction of the drawbar are transmitted to the two end gear trains through the planar link mechanism, thereby realizing the steering of the flatbed trailer. This steering mechanism is an active steering mechanism that can control the steering angle of the wheels, and has the characteristics of flexible steering, high load capacity, uniform and stable force on the flatbed trailer, simple structure, accurate steering, small structural stress and high reliability. Brief Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the overall structure of the active steering mechanism of the flatbed trailer according to an embodiment of the present invention;

[0021] Figure 2a It is a front view sectional view of the bearing turntable assembly in an embodiment of the present invention, Figure 2b and is a top view of the bearing turntable assembly;

[0022] Figure 3 It is a schematic diagram of the structure of the first swing arm assembly in an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the rotating rod assembly in an embodiment of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the second swing arm assembly in an embodiment of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the bogie assembly in an embodiment of the present invention. Detailed Description of the Embodiment

[0026] To make the purpose, content and advantages of the present invention clearer, the following further describes the detailed implementation manners of the present invention in conjunction with the drawings and embodiments.

[0027] This embodiment provides an active steering mechanism for a flatbed trailer, and its structure is as Figure 1 shown, mainly including a bearing turntable assembly 1, a first swing arm assembly 2, a rotating rod assembly 3, a second swing arm assembly 4, a turntable 5, a bogie assembly 6 and wheels 7.

[0028] As Figure 2a and 2bAs shown in the figure, the bearing turntable assembly 1 mainly includes a bearing pressure plate 1-1, a tapered roller bearing 1-2, a bearing shaft 1-3, a bearing outer sleeve 1-4, a bearing turntable plate 1-5 and a pull arm 1-6. Among them, the upper and lower ends of the bearing shaft 1-3 are respectively inlaid with the bearing pressure plate 1-1 through square holes. The tapered roller bearing 1-2 is sleeved on the outside of the bearing shaft 1-3 and is located between the bearing pressure plates 1-1 at the upper and lower ends. The bearing outer sleeve 1-4 is sleeved on the outside of the tapered roller bearing 1-2. Two groups of bearing turntable plates 1-5 with opposite positions are welded on the outer wall of the bearing outer sleeve 1-4. The outer ends of each group of bearing turntable plates 1-5 are welded with two parallel pull arms 1-6 perpendicular to the bearing turntable plate 1-5. The bearing turntable assembly 1 is used as the active steering component. The bearing pressure plates 1-1 at the upper and lower ends are fixed on the frame of the flatbed trailer through bolts. The pull arm 1-6 is connected to the towing device of the trailer. The bearing turntable plate 1-5 is fixedly connected to the first swivel arm seat 2-1 of the first swivel arm assembly 2 through bolts.

[0029] As Figure 3 shown in the figure, the first swivel arm assembly 2 is mainly welded by a first swivel arm seat 2-1, a first square steel 2-2, a second swivel arm seat 2-3, a second square steel 2-4 and a third swivel arm seat 2-5. Among them, the first swivel arm seat 2-1 is connected to the bearing turntable plate 1-5 of the bearing turntable assembly 1 through bolts. The second swivel arm seat 2-3 is connected to the first swivel arm seat 2-1 through the first square steel 2-2. The third swivel arm seat 2-5 is connected to the second swivel arm seat 2-3 through the second square steel 2-4, and the first square steel 2-2 and the second square steel 2-4 are perpendicular to each other.

[0030] As Figure 4 shown in the figure, the rod assembly 3 mainly includes a left-handed ball head pin 3-1, a rod 3-2 and a right-handed ball head pin 3-3. Among them, the left-handed ball head pin 3-1 and the right-handed ball head pin 3-3 are respectively installed at the left and right ends of the rod 3-2.

[0031] As Figure 5 shown in the figure, the second swivel arm assembly 4 is mainly welded by a rotating shaft sleeve 4-1, a third square steel 4-2 and a hinge 4-3. Among them, the rotating shaft sleeve 4-1 and the hinge 4-3 are respectively located at the front and rear ends of the third square steel 4-2.

[0032] As Figure 6As shown in the figure, the bogie assembly 6 is mainly welded by a turntable support frame 6-1, a front wheel support frame 6-2, a wheel axle wheel groove 6-3, a wheel axle bushing 6-4, a first reinforcing plate 6-5 and a second reinforcing plate 6-6. Among them, the turntable support frame 6-1 is the foundation. Using the through hole of the turntable support frame 6-1 and the turntable 5, the turntable 5 that can rotate freely is installed on the upper plane of the turntable support frame 6-1 with bolts, and the upper end of the turntable 5 is fixed on the frame of the flatbed trailer. The lower end of the turntable support frame 6-1 is welded with a front wheel support frame 6-2. The front wheel support frame 6-2 serves as the skeleton for supporting the wheel 7, and its lower end is welded with a wheel axle wheel groove 6-3. The longitudinal bushing of the wheel axle wheel groove 6-3 is connected to the rotating shaft sleeve 4-1 of the second swing arm assembly 4, and a wheel axle bushing 6-4 is fixed in the transverse wheel groove of the wheel axle wheel groove 6-3. A tire axle passes through the central hole of the wheel axle bushing 6-4, and a wheel 7 is installed on the tire axle. The first reinforcing plate 6-5 and the second reinforcing plate 6-6 serve as reinforcing ribs and are respectively welded between the wheel axle wheel groove 6-3 and the front wheel support frame 6-2, and between the front wheel support frame 6-2 and the turntable support frame 6-1.

[0033] On both sides of the third swing arm seat 2-5, it is respectively connected with a left-handed ball head pin 3-1 of a swing rod assembly 3 and a right-handed ball head pin 3-3 of another swing rod assembly 3. The right-handed ball head pins 3-3 and the left-handed ball head pins 3-1 of the two swing rod assemblies 3 are respectively connected to a hinge 4-3 of a second swing arm assembly 4. The left and right threaded screws of the ball head pins 3-1 and 3-3 rotate inside the swing rod 3-2. Since the screw threads of the ball head pins 3-1 and 3-3 are respectively left-handed and right-handed, when the swing rod 3-2 rotates, the screw threads of the ball head pins 3-1 and 3-3 are simultaneously screwed in or out, thus achieving the adjustment of the length between the first swing arm assembly 2 and the second swing arm assembly 4. The rotating shaft sleeve 4-1 of the second swing arm assembly 4 is fixedly connected to a wheel axle wheel groove 6-3 of a bogie assembly 6 through a pin shaft. Under the action of the second swing arm assembly 4, the bogie assembly 6 can rotate at the required angle.

[0034] In the active steering mechanism of the flatbed trailer of the present invention, each component is connected into a planar four-bar linkage mechanism through ball head pins, and under the action of the towing frame, the trailer is towed forward and steered left and right. The specific working principle is as follows:

[0035] When the flatbed trailer turns, the towing device drives the bearing turntable 1-5 to rotate around the bearing shaft 1-3 through the pull arm 1-6 of the bearing turntable assembly 1. The bearing turntable 1-5 drives the swing rod assembly 3 through the first swing arm assembly 2. The movement and force of the swing rod assembly 3 cause the bogie assembly 6 to make an arc movement around the turntable 5 through the second swing arm assembly 4, thereby driving the wheel 7 to make a turning movement.

[0036] When the flatbed trailer moves forward, the towing device transfers the forward force to the vehicle frame through the bearing turntable assembly 1. Since the turntable 5 is fixed to the vehicle frame, the force on the vehicle frame is transmitted to the wheels 7 through the turntable 5 and the bogie assembly 6, thereby achieving the purpose of the flatbed trailer moving forward.

[0037] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. An active steering mechanism for a flatbed trailer, characterized in that: The active steering mechanism comprises a bearing turntable assembly, a first turntable arm assembly, a turnbar assembly, a second turntable arm assembly, a turntable, a bogie assembly and wheels; wherein, The bearing turntable assembly comprises a bearing pressure plate, a tapered roller bearing, a bearing shaft, a bearing sleeve, a bearing turntable and a pull arm; wherein, the upper and lower ends of the bearing shaft are respectively provided with pressure plates through square holes, the tapered roller bearing sleeve is arranged on the outer side of the bearing shaft and is located between the bearing pressure plates at the upper and lower ends, the bearing sleeve is arranged on the outer side of the tapered roller bearing, two groups of bearing turntables in opposite positions are fixedly connected to the outer wall of the bearing sleeve, and the outer end of each group of bearing turntables is fixedly connected to two pull arms arranged in parallel and perpendicular to the bearing turntable; The first rotating arm assembly comprises a first rotating arm seat, a first square steel, a second rotating arm seat, a second square steel and a third rotating arm seat; wherein the first rotating arm seat is connected to the bearing rotating plate of the bearing rotating plate assembly by bolts, the second rotating arm seat is connected to the first rotating arm seat by the first square steel, the third rotating arm seat is connected to the second rotating arm seat by the second square steel, and the first square steel and the second square steel are perpendicular to each other; The rotating rod assembly comprises a left-handed ball stud, a rotating rod and a right-handed ball stud; wherein the left-handed ball stud and the right-handed ball stud are respectively installed at the left and right ends of the rotating rod; The second rotating arm assembly includes a rotating shaft sleeve, a third party steel and a hinge; wherein the rotating shaft sleeve and the hinge are respectively installed at the front and rear ends of the third party steel; The bogie assembly comprises a turntable support frame, a front wheel support frame, a wheel axle groove and a wheel axle sleeve; wherein, the turntable that can rotate freely is installed on the upper end plane of the turntable support frame by bolts using the through holes of the turntable support frame and the turntable, and the upper end of the turntable is fixed to the frame of the flatbed trailer; the lower end of the turntable support frame is fixedly connected to the front wheel support frame, the lower end of the front wheel support frame is fixedly connected to the wheel axle groove, the longitudinal sleeve of the wheel axle groove is connected to the rotating sleeve of the second swing arm assembly, the wheel axle sleeve is fixed in the transverse groove of the wheel axle groove, the center hole of the wheel axle sleeve penetrates the tire axle, and the wheel is installed on the tire axle; a first reinforcing plate is welded between the wheel axle groove and the front wheel support frame; a second reinforcing plate is welded between the front wheel support frame and the turntable support frame; The two sides of the third swing arm seat are respectively connected to the left-hand ball pin of a swing rod assembly and the right-hand ball pin of another swing rod assembly; the right-hand ball pin and the left-hand ball pin of the two swing rod assemblies are respectively connected to the hinge of a second swing arm assembly, and the screw of the ball pin rotates inside the swing rod; the rotating shaft of the second swing arm assembly is fixedly connected to the wheel axle groove of the bogie assembly through a pin shaft.

2. The active steering mechanism according to claim 1, characterized in that: The first rotating arm assembly is formed by welding a first rotating arm seat, a first square steel, a second rotating arm seat, a second square steel and a third rotating arm seat.

3. The active steering mechanism according to claim 1, characterized in that: The second rotating arm assembly is welded by a rotating shaft sleeve, third-party steel and a hinge.

4. The active steering mechanism according to claim 1, characterized in that: The bogie assembly is formed by welding a turntable support frame, a front wheel support frame, an axle groove and an axle sleeve.

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