Trailer steering mechanism and platform trailer

Abstract

The utility model discloses a trailer steering mechanism and a platform trailer, the steering mechanism comprises a frame, two turntables, a steering axle and a connecting rod, the two turntables are respectively arranged on the front side and the rear side of the bottom of the frame; one of the two steering axles is arranged on the turntable on the front side of the frame, and the other steering axle is arranged on the turntable on the rear side of the frame; the two ends of the connecting rod are hinged to the two steering axles respectively, and an included angle is formed between the connecting rod and the center line of the frame. The traction arm is detachably connected with the two steering axles and used for being connected with a tractor. According to the trailer steering mechanism and the platform trailer, a small turning angle can be achieved, the minimum turning radius of the whole trailer frame can be reduced, turning can be carried out in a narrower channel, then the passing capacity of the whole platform trailer in a narrow space can be improved, and turning-around driving can be conveniently carried out.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of transport tools, in particular to a trailer steering mechanism and a flatbed trailer. BACKGROUND

[0002] The flatbed trailer is a transport tool used with a towing vehicle, and its driving and steering are realized by the towing vehicle. The steering mechanism of the existing flatbed trailer can only realize the steering of the front wheels. The towing arm of the steering structure drives the steering of the front wheels, and the rear wheels realize steering under the traction of the front wheels, so as to realize the overall turning of the flatbed trailer. However, the steering of this steering mechanism is not flexible, and the turning radius is large. When turning in a narrow channel, the whole vehicle is difficult to pass through.

[0003] Therefore, how to provide a trailer steering mechanism can reduce the minimum turning radius to improve the passing ability of the whole trailer in a narrow space is a technical problem to be solved by those skilled in the art. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems, the utility model provides a trailer steering mechanism and a flatbed trailer, which can realize the steering of two steering axles in linkage, and the two steering axles rotate by the same angle, so as to realize a smaller turning angle, reduce the minimum turning radius, and further improve the passing ability of the whole trailer in a narrow space.

[0005] The technical scheme provided by the utility model is as follows:

[0006] A trailer steering mechanism, comprising: a vehicle frame;

[0007] Two rotating discs are arranged on the front side and the rear side of the bottom of the vehicle frame respectively;

[0008] Two steering axles, one of which is arranged on the rotating disc on the front side of the vehicle frame, and the other is arranged on the rotating disc on the rear side of the vehicle frame;

[0009] A connecting rod, the two ends of the connecting rod are hingedly connected to the two steering axles respectively, and the connecting rod is at an angle with the center line of the vehicle frame;

[0010] A towing arm, which is detachably connected to the two steering axles respectively, is used to connect the towing vehicle.

[0011] Further, the rotating disc comprises an upper rotating disc and a lower rotating disc, the upper rotating disc and the lower rotating disc are relatively rotatably connected, the upper rotating disc is fixed on the bottom of the vehicle frame, and the steering axle is fixed on the lower rotating disc.

[0012] Further, the traction arm is rotatable up and down relative to the frame in a vertical direction, and a locking mechanism is arranged to fix the traction arm to the frame.

[0013] Further, the locking mechanism comprises a pin, a first hole and a second hole, the first hole is arranged on the traction arm, the second hole is arranged on the frame, the traction arm is rotated upward to align the first hole with the second hole, and the pin is inserted through the first hole and the second hole to fix the traction arm to the frame.

[0014] Further, the pin comprises a pin rod, a spring and a limiting sleeve, the spring is sleeved on the pin rod, one end of the spring close to the traction arm is fixed to the pin rod, and the spring is located inside the limiting sleeve, the limiting sleeve is fixed to the frame and allows one end of the pin rod to be inserted into the first hole and the second hole.

[0015] Further, the traction arm is rotatable up and down relative to the frame in a vertical direction, and a locking mechanism is arranged to fix the traction arm to the frame.

[0016] Further, the traction arm is rotatable up and down relative to the frame in a vertical direction, and a locking mechanism is arranged to fix the traction arm to the frame.

[0017] A flatbed trailer comprising the trailer steering mechanism as described above.

[0018] The trailer turning mechanism provided by the utility model, comprising a frame, a rotating disc, a steering axle and a connecting rod, two rotating discs are arranged on the front side and the rear side of the bottom of the frame respectively; one of the two steering axles is arranged on the rotating disc on the front side of the frame, and the other steering axle is arranged on the rotating disc on the rear side of the frame; the two ends of the connecting rod are hingedly connected to the two steering axles respectively, and the connecting rod and the center line of the frame form an included angle; a traction arm is detachably connected to the two steering axles and is used for connecting a tractor. The front and rear steering axles at the bottom of the frame are connected through the connecting rod, the steering axle on the front side of the frame is driven to turn by the tractor, and the steering axle on the rear side is driven to turn by the connecting rod, so that the front and rear steering axles can be linked to turn during turning, the two steering axles turn by the same angle, a smaller turning angle is realized, the minimum turning radius of the whole frame can be reduced, the trailer can turn in a narrower channel, and the passing capacity of the trailer in a narrow space can be improved. In addition, the traction arm is detachably connected to the steering axle. During turning, the traction arm can be detached from the steering axle on one side and assembled to the steering axle on the other side, so that bidirectional traction is realized, and the trailer is more convenient to turn. The utility model also provides a flatbed trailer comprising the above trailer turning mechanism, which has the above beneficial effects and can realize a smaller turning angle, reduce the minimum turning radius of the whole frame, turn in a narrower channel, improve the passing capacity of the trailer in a narrow space, and conveniently turn. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 It is a bottom view of the trailer turning mechanism in the utility model embodiment;

[0021] Figure 2 It is a side view of the trailer turning mechanism in the utility model embodiment;

[0022] Figure 3 It is a rear view of the trailer turning mechanism in the utility model embodiment;

[0023] Figure 4 It is a top view of the rotating disc of the trailer turning mechanism in the utility model embodiment;

[0024] Figure 5 It is the A-A sectional view of Figure 4 ; It is the A-A sectional view of

[0025] Figure 6It is the side view of the rotating disc of the trailer steering mechanism in the embodiment of the utility model;

[0026] Figure 7 It is the structure schematic view of the locking mechanism of the trailer steering mechanism in the embodiment of the utility model;

[0027] Figure 8 It is the structure schematic view of the bolt of the trailer steering mechanism in the embodiment of the utility model;

[0028] The figure mark: the frame 1, the rotating disc 2, the upper rotating disc 201, the lower rotating disc 202, the boss 203, the recess 204, the limiting groove 205, the ball 206, the bolt 207, the steering bridge 3, the connecting rod 4, the traction arm 5, the locking mechanism 6, the first jack 601, the pin rod 602, the spring 603, the limiting sleeve 604, the wheel 605, the mounting plate 7, the hinge shaft 8. DETAILED DESCRIPTION

[0029] In order to make the person skilled in the art better understand the technical scheme in the present application, the technical scheme in the embodiment of the present application will be described clearly and completely below, obviously, the described embodiment is only a part of the embodiment of the present application, not all the embodiments. Based on the embodiment in the present application, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the present application.

[0030] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of", "several" is two or more, unless otherwise specifically limited.

[0033] It is to be understood that the structures, proportions, sizes, etc. shown in the drawings of the present specification are merely used to cooperate with the disclosed content, to be understood and read by those skilled in the art, and are not used to limit the conditions of the application, and therefore do not have technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes of the application, should still fall within the scope of the disclosed technical content.

[0034] In the present application, the "front side" refers to the side close to the forward driving direction of the frame 1, and the "rear side" is opposite to the direction of the "front side".

[0035] In order to solve the technical problems existing in the prior art, such as Figures 1 to 3 As shown in the drawings, the embodiment provides a trailer steering mechanism, which comprises a frame 1.

[0036] Two turntables 2 are respectively arranged on the front side and the rear side of the bottom of the frame 1.

[0037] Two steering axles 3, one of which is arranged on the turntable 2 on the front side of the frame 1, and the other is arranged on the turntable 2 on the rear side of the frame 1.

[0038] A connecting rod 4, both ends of the connecting rod 4 are respectively hinged on the two steering axles 3, and the connecting rod 4 is at an angle with the center line of the frame 1.

[0039] A towing arm 5, which is detachably connected with the two steering axles 3, is used to connect a towing vehicle.

[0040] The trailer turning mechanism provided by the embodiment comprises a frame 1, a rotating disc 2, a steering bridge 3 and a connecting rod 4. The frame 1 is symmetrical in structure at the front and rear sides, one rotating disc 2 is arranged at the front side and the rear side of the bottom of the frame 1 respectively, the steering bridge 3 is arranged on each rotating disc 2, the steering bridge 3 can rotate relative to the frame 1 through the rotating disc 2, the two ends of the connecting rod 4 are hingedly connected to the front and rear steering bridges 3 respectively, the two ends of the connecting rod 4 are hingedly connected to the steering bridges 3 through ball joints respectively, the connecting rod 4 intersects with the center line of the frame 1 at an angle, that is, the connecting rod 4 intersects with the center line of the two rotating discs 2 at an angle. A traction arm 5 is detachably connected to the two steering bridges 3 respectively and used for connecting a towing vehicle. During turning, the towing vehicle drives the steering bridge 3 at the front side of the frame 1 to turn, the rear steering bridge 3 is driven by the connecting rod 4 to turn synchronously, the front and rear steering bridges 3 can turn synchronously, the two steering bridges 3 rotate synchronously by the same angle, so that a smaller turning angle is realized, the minimum turning radius of the frame 1 as a whole is reduced, the flatbed trailer can turn in a narrower passage, and the passing capacity of the flatbed trailer in the narrow passage is improved. In addition, the traction arm 5 is detachably connected to the steering bridge 3. During U-turn driving, the traction arm 5 is detached from the steering bridge 3 on the side, and then the traction arm 5 is assembled to the steering bridge 3 on the other side, so that bidirectional traction is realized, the flatbed trailer is more convenient to turn, and U-turn driving is also convenient.

[0041] Specifically, the connecting end of the traction arm 5 is provided with a hinge shaft, the traction arm 5 is rotatably installed on the hinge shaft, the traction arm 5 can rotate relative to the hinge shaft, the hinge shaft is parallel to the edge of the frame 1, the two ends of the hinge shaft are respectively provided with through holes, the through holes are perpendicular to the axial direction of the hinge shaft, two mounting plates are correspondingly arranged on the steering bridge 3, the mounting plates are respectively provided with a latch, and the latch can be inserted into the corresponding through hole, so that the traction arm 5 is detachably fixed on the steering bridge 3. More specifically, the latch comprises a pin 602, a spring 603 and a limiting sleeve 604, the spring 603 is sleeved on the pin 602, one end of the spring 603 close to the traction arm 5 is fixed on the pin 602, the spring 603 is located on the inner side of the limiting sleeve 604, and the limiting sleeve 604 is fixed on the mounting plate and makes one end of the pin 602 insertable into the through hole.

[0042] In order to realize that the steering bridge 3 can rotate relative to the frame 1, the rotating disc 2 is arranged on the bottom of the frame 1, the steering bridge 3 is arranged on the rotating disc 2, and the rotating disc 2 is rotatable relative to the frame 1. Figures 4 to 6As shown, preferably in the embodiment, the rotating disc 2 comprises an upper rotating disc 201 and a lower rotating disc 202, the upper rotating disc 201 and the lower rotating disc 202 are relatively rotatable connected, the upper rotating disc 201 is fixed on the bottom of the frame 1, and the steering axle 3 is fixed on the lower rotating disc 202. Specifically, the upper rotating disc 201 is fixed on the frame 1 through screws or bolts 207, and the lower rotating disc 202 is fixedly connected with the steering axle 3 through screws or bolts 207. More specifically, the upper rotating disc 201 is located on the inner side of the lower rotating disc 202, the top of the inner side of the lower rotating disc 202 is provided with an annular boss 203, and the bottom of the outer side of the upper rotating disc 201 is correspondingly provided with an annular groove 204, the upper rotating disc 201 and the lower rotating disc 202 are clamped together through the boss 203 and the groove 204 and are relatively rotatable. In order to make the upper rotating disc 201 and the lower rotating disc 202 relatively rotate more smoothly, the inner side of the top of the boss 203 is provided with a limiting groove 205, the limiting groove 205 can be matched with the corresponding corners of the groove 204 to form an annular channel, the cross section of the annular channel is in the shape of a circular arc, and the annular channel is provided with a plurality of balls 206, in the relative rotating process of the upper rotating disc 201 and the lower rotating disc 202, the surfaces of the upper rotating disc 201 and the lower rotating disc 202 in contact are rolled through the rollers, so that the friction between the upper rotating disc 201 and the lower rotating disc 202 can be reduced, and the relative rotation of the upper rotating disc 201 and the lower rotating disc 202 is more smooth. Here, the "inner side" refers to the side close to the center of the rotating disc 2, and the "outer side" refers to the side away from the center of the rotating disc 2.

[0043] In the embodiment, preferably, the trailer steering mechanism further comprises a locking mechanism 6, the traction arm 5 can rotate up and down relative to the frame 1 in the vertical direction, and the locking mechanism 6 is used for fixing the traction arm 5 and the frame 1. The length of the existing flatbed trailer, including the frame 1 and the traction arm 5, is too long, and the space occupied is large when it is stored or transported. In the embodiment, the traction arm 5 can rotate up and down in the vertical direction, when the flatbed trailer does not need to be connected with the towing vehicle, for example, during the storage or transportation process of the flatbed trailer, the traction arm 5 is rotated upward to be folded, and then the locking mechanism 6 is locked to fix the traction arm 5 and the frame 1, the traction arm 5 is close to the frame 1, so that the overall length of the frame 1 and the traction arm 5 is relatively reduced, and the occupied space can be reduced; when the traction arm 5 needs to be connected with the towing vehicle, the locking mechanism 6 releases the fixation of the traction arm 5, the traction arm 5 is rotated downward to be flat, so that the traction arm 5 can be connected with the towing vehicle.

[0044] The above locking mechanism 6 is further described in the embodiment, as shown in the drawings, Figure 7 and 8As shown, the locking mechanism 6 includes a latch, a first socket 601, and a second socket. The first socket 601 is located on the traction arm 5, and the second socket is located on the vehicle frame 1. The traction arm 5 is rotated upward to align the first socket 601 with the second socket. The latch passes through the first and second sockets to secure the traction arm 5 to the vehicle frame 1. Specifically, a first latch hole is provided on both sides of the traction arm 5, and two second sockets are correspondingly provided on the vehicle frame 1. The traction arm 5 is rotated upward to align the first socket 601 with the corresponding second sockets, and the latch is inserted into the corresponding first and second sockets, thereby securing the traction arm 5 relative to the vehicle frame 1.

[0045] This embodiment is preferred, as Figure 8 As shown, the latch includes a pin 602, a spring 603, and a limiting sleeve 604. The spring 603 is sleeved on the pin 602, and the end of the spring 603 close to the traction arm 5 is fixed to the pin 602. The spring 603 is located inside the limiting sleeve 604. The limiting sleeve 604 is fixed to the frame 1 and allows one end of the pin 602 to be inserted into the first and second sockets. Specifically, the pin 602 includes a handle section and a working section. The handle section and the working section are integrally formed and are L-shaped as a whole. The working section of the pin 602 is sleeved with a spring 603. The spring 603 is located inside the limiting sleeve 604 in a naturally extended state. The two ends of the limiting sleeve 604 are inserted into the working section of the pin 602, and the limiting sleeve 604 is fixed to the frame 1 by screws. Pulling the handle section of the pin 602 compresses the spring 603, moving the working section of the pin 602 away from the traction arm 5. After the first and second sockets 601 on the traction arm 5 are aligned, the pin 602 is released, the spring 603 returns to its original position, and one end of the working section of the pin 602 is inserted into the first and second sockets, securing the traction arm 5. The pin 602 structure is easy to use and provides a reliable connection.

[0046] In order to better fix the traction arm 5 and the frame 1, in the embodiment, the traction arm 5 is provided with a first insertion hole 601 on both sides, and the frame 1 is correspondingly provided with a bolt and a second insertion hole, the bolt is used for inserting into the corresponding first insertion hole 601 and second insertion hole. Specifically, the first insertion hole 601 is symmetrically arranged on both sides of the traction arm 5, the limiting sleeve 604 is symmetrically and fixedly arranged on both sides of the frame 1, the pin rod 602 is arranged on the limiting sleeve 604, the spring 603 is sleeved on the pin rod 602, and the spring 603 is in a natural elongation state and located in the limiting sleeve 604, the pin rod 602 is pulled, the spring 603 is compressed, the pin rod 602 is away from the traction arm 5, the traction arm 5 is rotated, the first insertion hole 601 on both sides of the traction arm 5 is aligned with the corresponding second insertion hole, the pin rod 602 is released, the pin rod 602 on both sides is respectively inserted into the corresponding first insertion hole 601 and second insertion hole, so that the both sides of the traction arm 5 are fixed with the frame 1, and the traction arm 5 is more stable and reliable.

[0047] In the embodiment, the steering axle 3 is provided with a wheel 605. Specifically, the wheel 605 includes front wheels and rear wheels, and each of the front wheels and the rear wheels has two, the front wheels are installed on the front steering axle 3, and the rear wheels are installed on the rear steering axle 3.

[0048] The embodiment also provides a flatbed trailer, which comprises the trailer steering mechanism. The frame 1 of the trailer steering mechanism is fixedly installed at the bottom of the vehicle body. The flatbed trailer also has the beneficial effects of the trailer steering mechanism, and during steering, the front and rear steering axles 3 can be linked to turn, the two steering axles 3 are synchronously turned by the same angle, so that a smaller turning angle is realized, the minimum turning radius of the frame 1 as a whole is reduced, the flatbed trailer can turn in a narrower channel, and the passing capacity of the flatbed trailer in the narrow channel is improved.

[0049] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A trailer steering mechanism, characterized by, The utility model relates to a trailer steering mechanism, comprising: a frame; two steering wheels arranged at the front and rear of the bottom of the frame respectively; two steering axles, one of which is arranged on the steering wheel at the front of the frame, and the other is arranged on the steering wheel at the rear of the frame; a connecting rod, the two ends of which are hingedly connected to the two steering axles respectively, and the connecting rod is at an angle to the center line of the frame; a towing arm, which is detachably connected to the two steering axles respectively, for connecting a towing vehicle.

2. The trailer steering mechanism of claim 1, wherein, The steering wheel comprises an upper steering wheel and a lower steering wheel, which are relatively rotatably connected, the upper steering wheel is fixed at the bottom of the frame, and the steering axle is fixed on the lower steering wheel.

3. The trailer steering mechanism of claim 1, wherein, The utility model further comprises a locking mechanism, the towing arm can rotate up and down relative to the frame in the vertical direction, and the locking mechanism is used for fixing the towing arm and the frame.

4. The trailer steering mechanism of claim 3, wherein, The locking mechanism comprises a latch, a first insertion hole and a second insertion hole, the first insertion hole is located on the towing arm, the second insertion hole is located on the frame, the first insertion hole is aligned with the second insertion hole when the towing arm rotates upward, and the latch passes through the first insertion hole and the second insertion hole to fix the towing arm and the frame.

5. The trailer steering mechanism of claim 4, wherein, The latch comprises a pin, a spring and a limiting sleeve, the spring is sleeved on the pin, one end of the spring close to the towing arm is fixed on the pin, the spring is located inside the limiting sleeve, the limiting sleeve is fixed on the frame, and one end of the pin can be inserted into the first insertion hole and the second insertion hole.

6. The trailer steering mechanism of claim 5, wherein, The first insertion hole is arranged on both sides of the towing arm, and the frame is correspondingly provided with a latch and a second insertion hole, the latch is used for being inserted into the corresponding first insertion hole and second insertion hole.

7. The trailer steering mechanism of any one of claims 1 to 6, wherein, The steering axle is provided with a wheel.

8. A flatbed trailer characterized by, The utility model further comprises the trailer steering mechanism according to any one of claims 1 to 7. The utility model further comprises the trailer steering mechanism according to any one of claims 1 to 7.

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