Protective frame of trailer traction mechanism

Abstract

The utility model discloses a trailer traction mechanism protection frame, and belongs to the technical field of semitrailers. The trailer traction mechanism protection frame comprises a front protection frame and a rear protection frame which are connected to the bottom of a trailer carriage and arranged on the front side and the rear side of a saddle respectively so as to avoid unhooking of a trailer, an interlayer is arranged on the front portion of the trailer carriage, and a turnover mechanism is arranged in the interlayer. And the front protective frame is connected with the turnover mechanism. When the main frame and the trailer compartment are picked and hung, the turnover mechanism turns over the front protection frame into the interlayer, and the main frame is separated from the front end of the trailer compartment to be picked and hung. When the main frame is hung on the trailer carriage, the front protection frame is arranged in the interlayer, after hanging is completed, the turnover mechanism turns over the front protection frame out of the interlayer, and the front protection frame and the rear protection frame are arranged on the front side and the rear side of the saddle respectively. The safety risk caused by the fact that a main vehicle saddle locking mechanism or a trailer traction pin is accidentally damaged, slides forwards out of control to impact a cab or is abnormally separated in the running process can be effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of semi-trailer vehicle technology, and more specifically to a protective frame for a trailer traction mechanism. Background Technology

[0002] When a semi-trailer is in motion, the tractor unit pulls the trailer, with the tractor unit connecting the tractor unit to the trailer saddle via a trailing pin. The trailing pin is the primary force-bearing component for the vehicle's movement and reversing motion. It is mounted on the trailer's movable plate and secured with screws. When the tractor unit and trailer are coupled, the tractor unit locks the trailing pin, completing the coupling action. During vehicle use, the tractor unit and trailing pin must be inspected. Excessive wear on the tractor unit's locking mechanism and sudden breakage of the trailing pin can cause the trailer to uncouple.

[0003] The existing technology for semi-trailer trucks has the following problems:

[0004] 1. If the trailer's towing pin or towing pin fixing bolt breaks, and the vehicle brakes suddenly, the tractor unit has good braking performance, but the trailer's braking response is slow or poor. Or, if the vehicle is traveling at high speed and suddenly decelerates, the trailer may slide forward and impact the tractor unit's cab or veer in other directions, posing a serious safety hazard and causing injury to the driver and pedestrians.

[0005] 2. The mechanism for locking the towing pin on the tractor unit is excessively worn, which is not easily detected during routine inspections and poses a serious safety hazard. During vehicle start-up or acceleration, the tractor unit drives the trailer. If the tractor unit locking mechanism is damaged, the tractor unit and trailer may separate abnormally, causing the trailer to overturn and resulting in property damage.

[0006] 3. During normal transportation, the tractor drives the trailer. If the saddle locking mechanism is damaged, the tractor and trailer will separate abnormally. The trailer will run uncontrollably to any place, posing a serious safety threat to surrounding vehicles and pedestrians. The safety risk is even greater when traveling at high speeds. Utility Model Content

[0007] 1. The technical problem to be solved by the utility model:

[0008] In response to the above-mentioned problems of existing semi-trailer trucks, this utility model provides a trailer traction mechanism protective frame. By arranging front and rear protective frames on the front and rear sides of the saddle, it prevents trailer unhooking accidents caused by damage to the vehicle's saddle locking mechanism or towing pin, thereby reducing safety risks.

[0009] 2. Technical solution:

[0010] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0011] A protective frame for a trailer traction mechanism includes a saddle connected to the surface of the main frame. The saddle is used for attaching and detaching the main frame and the trailer body. The protective frame includes a front protective frame and a rear protective frame connected to the bottom of the trailer body and positioned in front of and behind the saddle to prevent the trailer from unhooking. A partition is provided at the front of the trailer body, and a tilting mechanism is built into the partition. The front protective frame is connected to the tilting mechanism to prevent interference during attachment and detachment.

[0012] A further technical solution involves a triangular flipping mechanism, which includes a return spring, a movable plate, a movable shaft, a triangular pressure block, and a flipping shaft. The front end of the movable plate is connected to the return spring and is continuously tightened by the return spring. The rear end of the movable plate is rotatably connected to the partition through the movable shaft. The bottom edge of the triangular pressure block is pressed against the surface of the movable plate, and the top corner is rotatably connected to the partition through the flipping shaft. The bottom of the movable plate is connected to the front protective frame. The triangular flipping mechanism has a simple flipping action and a small flipping stroke, making it suitable for the limited and narrow spaces of the partition.

[0013] A further technical solution involves a flip handle connected to the side of the triangular pressure block. The bottom of the flip handle is connected to the top corner and side of the triangular pressure block, making operation easier.

[0014] A further technical solution involves shaping the triangular pressure block into an isosceles triangle with the sides longer than the base. This increases the flipping stroke and also improves the lever ratio of the flipping handle, making flipping easier.

[0015] A further technical solution is that the inner sides of the front and rear protective frames are arc-shaped to match the two sides of the saddle, which buffers the impact force and has a clamping effect on the saddle. The outer sides are connected with supporting ribs to improve the protective strength of the front and rear protective frames.

[0016] A further technical solution involves a tipping mechanism that flips the front protective frame into the compartment when the main frame is attached to the trailer body, allowing the main frame to separate from the front of the trailer body.

[0017] When the main frame is attached to the trailer, the front protective frame is inside the compartment. After attachment is completed, the tilting mechanism flips the front protective frame out of the compartment, and the front and rear protective frames are positioned in front of and behind the saddle respectively.

[0018] 3. Beneficial effects:

[0019] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0020] The trailer traction mechanism protective frame of this utility model can control the trailer to slide within a small range on the saddle of the tractor unit when the locking mechanism of the tractor unit or the trailer towing pin is damaged. This can effectively prevent the trailer from sliding forward uncontrollably and impacting the cab, or from abnormally separating and rushing to other places during driving, thus eliminating the safety threat to surrounding vehicles and pedestrians. At this time, the connection between the tractor unit and the trailer will produce shaking gaps and noises, which the driver can hear or discover in time and stop to inspect and repair. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the protective frame structure of the trailer traction mechanism in a specific embodiment;

[0022] Figure 2 This is a schematic diagram of the trailer body structure from below in a specific embodiment;

[0023] Figure 3 This is a side view of the trailer body structure in a specific embodiment;

[0024] Figure 4 This is a schematic diagram of the triangular flipping mechanism in a specific embodiment, showing its flipping state.

[0025] Figure 5 This is a schematic diagram of the triangular flipping mechanism in an upright state according to a specific embodiment.

[0026] In the diagram: 1. Cab; 2. Saddle; 3. Front guard frame; 4. Front support rib; 5. Return spring; 6. Tilting handle; 7. Triangular tilting mechanism; 8. Movable plate; 9. Movable shaft; 10. Towing pin; 11. Rear guard frame; 12. Rear support rib; 13. Trailer body; 14. Main frame; 15. Towing pin fixing bolt; 71. Triangular pressure block; 72. Tilting shaft; 131. Divider. Detailed Implementation

[0027] To further understand the contents of this utility model, a detailed description of the utility model is provided in conjunction with the accompanying drawings.

[0028] Example

[0029] The trailer traction mechanism protective frame in this embodiment, such as Figure 1 , 2 As shown in Figure 3, a saddle 2 is connected to the surface of the main frame 14. The saddle 2 is used for attaching and detaching the main frame 14 and the trailer body 13. The protective frame includes a front protective frame 3 and a rear protective frame 11 connected to the bottom of the trailer body 13 and positioned in front of and behind the saddle 2 to prevent the trailer from unhooking. During installation, the maximum diagonal distance of the saddle 2 is measured. The distance between the front and rear protective frames is greater than the maximum diagonal distance of the saddle 2 and should not affect the turning operation of the trailer. The height of the two protective frames is set as follows: after the main frame 14 and the trailer body 13 are attached, the lower edge of the protective frame is lower than the lower edge of the upper plane of the main frame saddle 2.

[0030] The front of the trailer body 13 is provided with a partition 131, which has a built-in tilting mechanism; the front guard frame 3 is connected to the tilting mechanism to avoid interference when attaching or detaching the trailer body.

[0031] like Figure 1 , 3 As shown in Figures 4 and 5, the flipping mechanism is a triangular flipping mechanism 7, which includes a return spring 5, a movable plate 8, a movable shaft 9, a triangular pressure block 71, and a flipping shaft 72. The front end of the movable plate 8 is connected to the return spring 5 and is continuously tightened by the return spring 5, pulling the movable plate 8 upward. The rear end of the movable plate 8 is rotatably connected to the partition 131 through the movable shaft 9. The bottom edge of the triangular pressure block 71 is pressed against the surface of the movable plate 8, and the top corner is rotatably connected to the partition 131 through the flipping shaft 72. The bottom of the movable plate 8 is connected to the front protective frame 3. The triangular flipping mechanism 7 has a simple flipping action and a small flipping stroke, making it suitable for the limited and narrow space of the partition 131.

[0032] A flip handle 6 is connected to the side of the triangular pressure block 71. The bottom rod of the flip handle 6 is connected to the top corner and side of the triangular pressure block 71, making operation easier. The flip handle 6 controls the up and down movement of the front protective frame 3 and the movable plate 8.

[0033] The triangular pressure block 71 is an isosceles triangle with the side longer than the base. This increases the flipping stroke and also improves the lever ratio of the flipping handle 6, making flipping easier.

[0034] The inner sides of the front protective frame 3 and the rear protective frame 11 are arc-shaped structures matching the two sides of the saddle 2, which buffer the impact force and have a clamping effect on the saddle 2. The outer sides of both protective frames are connected with supporting stiffeners, namely the front supporting stiffener 4 and the rear supporting stiffener 12, which improve the protective strength of the front protective frame 3 and the rear protective frame 11. During assembly, the bracket of the rear protective frame 11 is welded to the movable plate on the contact surface between the bottom of the trailer body 13 and the saddle 2, and four supporting stiffeners are welded to the outer side of the protective frame. The front protective frame 3 and the movable plate 8 are connected as a whole, and four supporting stiffeners are welded to the outer side to increase strength. The movable plate 8 has movable shafts 9 on both sides and is installed in the middle partition layer 131 of the trailer body 13 for easy up and down movement.

[0035] In this embodiment, when the main frame 14 is attached to the trailer carriage 13, the flipping mechanism flips the front protective frame 3 into the partition 131, and the main frame 14 is separated from the front end of the trailer carriage 13.

[0036] When the main frame 14 is attached to the trailer box 13, the front protective frame 3 is inside the partition 131. After the attachment is completed, the flipping mechanism flips the front protective frame 3 out of the partition 131. The front protective frame 3 and the rear protective frame 11 are positioned in front of and behind the saddle 2 respectively.

[0037] The specific working principle is as follows:

[0038] 1. When coupling or disengaging the main frame 14 and the trailer body 13, first flip the triangular tilting mechanism 7 to create a larger gap between the front protective frame 3 and the movable plate 8 and the triangular tilting mechanism 7; then, grasp the tilting handle 6 of the triangular tilting mechanism 7 and, using the lever principle, ... Figure 4 As shown, with the rotating center axis 72 of the triangular pressure block as the fulcrum, it flips forward. Under the action of the return spring 5, the front protective frame 3 and the movable plate 8 retract into the compartment 131, which facilitates the separation and attachment of the main vehicle from the front of the trailer.

[0039] 2. The main frame 14 and trailer box 13 can be directly coupled because the front protective frame 3 is retracted within the compartment 131 of the trailer box. After coupling, the triangular tilting mechanism 7 is flipped. Holding the tilting handle 6 of the triangular tilting mechanism 7, leveraging the lever principle, such as... Figure 5 As shown, with the rotating center axis 72 of the triangular pressure block as the fulcrum, it flips backward, and the triangular pressure block 71 presses down on the front protective frame 3 and the movable plate 8, causing them to extend out of the compartment 131 and not retract into the compartment 131. When the trailer accidentally detaches, the saddle 2 will impact the front protective frame 3. The triangular pressure block 71 can effectively control the front protective frame 3, preventing it from accidentally retracting into the compartment 131 under force, thus effectively providing protection.

[0040] In summary, the trailer traction mechanism protective frame of this embodiment can control the trailer to slide within a small range on the main vehicle saddle 2 when the trailer traction pin 10 or traction pin fixing screw 15 breaks or is damaged. This can effectively prevent the trailer from going out of control and abnormally separating and unhooking, prevent the trailer from sliding forward and impacting the cab 1, eliminate the safety threat to surrounding vehicles and pedestrians, and avoid serious safety accidents.

[0041] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention. The actual structure and manufacturing steps are not limited to these. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A protective frame for a trailer traction mechanism, wherein a saddle (2) is connected to the surface of the main frame (14), characterized in that: Includes a front guard frame (3) and a rear guard frame (11) connected to the bottom of the trailer body (13) and arranged in front of and behind the saddle (2). The front of the trailer body (13) is provided with a partition (131) with a built-in tilting mechanism. The front guard frame (3) is connected to the tilting mechanism.

2. The trailer traction mechanism protective frame according to claim 1, characterized in that: The flipping mechanism is a triangular flipping mechanism (7), which includes a return spring (5), a movable plate (8), a movable shaft (9), a triangular pressure block (71), and a flipping shaft (72). The front end of the movable plate (8) is connected to the return spring (5) and is continuously tightened by the return spring (5). The rear end of the movable plate (8) is rotatably connected to the partition (131) through the movable shaft (9). The bottom edge of the triangular pressure block (71) is pressed against the surface of the movable plate (8), and the top corner is rotatably connected to the partition (131) through the flipping shaft (72). The bottom of the movable plate (8) is connected to the front protective frame (3).

3. The trailer traction mechanism protective frame according to claim 2, characterized in that: The side of the triangular pressure block (71) is connected to a flip handle (6), and the bottom rod of the flip handle (6) is connected to the top corner and side of the triangular pressure block (71).

4. The trailer traction mechanism protective frame according to claim 3, characterized in that: The triangular pressure block (71) is an isosceles triangle with the sides longer than the base.

5. The trailer traction mechanism protective frame according to any one of claims 1-4, characterized in that: The outer sides of both the front protective frame (3) and the rear protective frame (11) are connected to supporting stiffeners.

6. The trailer traction mechanism protective frame according to claim 5, characterized in that: When the main frame (14) is attached to the trailer car body (13), the flipping mechanism flips the front protective frame (3) into the partition (131), and the main frame (14) is separated from the front end of the trailer car body (13). When the main frame (14) is attached to the trailer (13), the front protective frame (3) is inside the partition (131). After the attachment is completed, the flipping mechanism flips the front protective frame (3) out of the partition (131), and the front protective frame (3) and the rear protective frame (11) are positioned in front of and behind the saddle (2).

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