A self-locking method for the tailgate of a translational dump trailer

Abstract

The present invention relates to the technical field of dump trucks, and in particular to a self-locking method for the tailgate of a translational dump semi-trailer. The method comprises a frame and a carriage, wherein a tailgate is installed at the rear side of the carriage, and tailgate lock rods are respectively provided on both sides of the bottom of the tailgate; a tailgate lock hook is installed in the side frame at the bottom of the carriage at a position corresponding to the tailgate lock rod through a rotating shaft, and when the tailgate is closed, the tailgate lock hook is supported by the side beam, so that the tailgate lock hook and the tailgate lock rod are engaged to achieve tailgate locking; when the carriage is unloaded, as the carriage moves backward, the tailgate lock hook gradually separates from the side beam, loses the support of the side beam, and the tailgate lock hook relies on its own gravity to separate from the tailgate lock rod to achieve tailgate unlocking, and the materials in the carriage are unloaded from the hollow bottom of the rear side of the carriage and the tailgate. The automatic opening and closing of the tailgate is achieved by moving the carriage forward and backward, and the cumbersome hydraulic module in the traditional form of cylinder locking is abandoned, which has the advantages of simple structure, higher efficiency, low cost, and not easy to damage.

Description

Technical field:

[0001] The invention relates to the technical field of dump trucks, and in particular to a self-locking method for a tailgate of a translational dump semi-trailer. Background technology:

[0002] At present, when bulk material dump trucks are unloading, in addition to the commonly used chain unloading method and push plate unloading method, a translation carriage unloading method has also emerged. For example, the patent application with publication number CN114559871A discloses a two-stage linkage rolling unloading device for a dump semi-trailer. On the one hand, the carriage is driven to move on the frame by a cylinder, and on the other hand, the push plate is driven to move in the carriage by a cylinder. The bottom of the rear side of the carriage is hollow, and the cargo falls from the hollow part to complete the unloading. This unloading method has the following disadvantages in practical application: since the entire rear side panel of the vehicle is an integral fixed baffle, after the bulk material is unloaded, it naturally piles up into a cone shape, with the top of the material exceeding the lower half of the rear side panel. When the vehicle moves to reset, the top of the material will scrape against the lower half of the rear side panel, resulting in high resistance to reset and high power loss in the oil cylinder. The bottom of the rear side panel will scrape the top of the material flat, causing high stress on the rear side panel. Over time, the rear side panel is prone to deformation, affecting its overall service life. Although some dump trucks have a tailgate on the lower half of the rear side panel, current tailgates either need to be manually locked and unlocked, which is inconvenient to operate, or locked by a hydraulic cylinder, which has disadvantages such as complex structure, high cost, and easy damage.

[0003] In summary, the above-mentioned problems of the translational dump semi-trailer during the unloading process have become technical problems that need to be solved urgently in the industry. Summary of the invention:

[0004] In order to make up for the shortcomings of the existing technology, the present invention provides a self-locking method for the tailgate of a translational dump semi-trailer, which solves the problem that the rear side plate is an integral fixed baffle and is prone to scratching against the top of the material, and solves the problem that the previous tailgate locking mechanism has a complex structure, inconvenient operation, high cost, and easy damage.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] The invention relates to a self-locking method for the tailgate of a translation-type dump semi-trailer, comprising a frame and a carriage, wherein the carriage is mounted on the frame via rollers, and the carriage is driven to move forward and backward along the frame by an oil cylinder mounted on the frame, and a hollow bottom portion at the rear side of the carriage is used for unloading. A tailgate is mounted at the rear side of the carriage, and tailgate locking rods are respectively provided on both sides of the bottom portion of the tailgate. A tailgate locking hook is mounted via a rotating shaft at a position corresponding to the tailgate locking rod in a side frame at the bottom portion of the carriage. When the tailgate is closed, the tailgate locking hook is supported by a side beam so as to engage with the tailgate locking rod to lock the tailgate. When the carriage is unloaded, as the carriage moves backward, the tailgate locking hook gradually separates from the side beam, and loses the support supported by the side beam. The tailgate locking hook relies on its own gravity to separate from the tailgate locking rod to unlock the tailgate, and the materials in the carriage are unloaded from the hollow bottom portion at the rear side of the carriage and the tailgate.

[0007] After unloading is completed, when the carriage is reset, as the carriage moves forward, the tailgate will automatically flip up when it contacts the top of the material to avoid hard scratches on the top of the material, thereby reducing the resistance to the carriage reset.

[0008] The top of the tailgate is connected to the vehicle compartment through a hinge, and the bottom of the tailgate is a free end.

[0009] The hook groove of the tailgate lock hook is arranged upward, and the bottom of the tailgate lock hook contacts and cooperates with the side beam of the vehicle frame.

[0010] The tailgate lock hook is in a disengaged state from the tailgate lock rod when not subjected to the squeezing force of the side beams of the vehicle frame.

[0011] The end of the side beam of the vehicle frame is provided with a transition slope matched with the tailgate lock hook.

[0012] A lock rod groove matched with a tailgate lock rod is provided at the rear end of the side frame at the bottom of the vehicle compartment.

[0013] A lock hook groove for rotating the tailgate lock hook is provided at the rear end of the side frame at the bottom of the vehicle compartment.

[0014] A plurality of positioning posts are provided on the side beams of the vehicle frame, and a plurality of positioning lock hooks matched with the positioning posts are installed on the side frames of the bottom of the vehicle body.

[0015] The positioning lock hooks located at both ends of the side frame are one-way lock hooks, and the positioning lock hook located in the middle of the side frame is a two-way lock hook.

[0016] The present invention adopts the above solution and has the following advantages:

[0017] By installing a tailgate on the lower half of the rear tailgate of the car body, the top of the tailgate is connected to the crossbeam in the middle of the tailgate through a hinge, and the bottom of the tailgate is a free end. When the material is unloaded and the car body moves to reset, the tailgate will automatically flip up when it comes into contact with the material to avoid hard scratches on the top of the material. The car body reset resistance is small, the cylinder power loss is small, and the rear side panel is subjected to small force, which avoids deformation of the rear side panel and ensures the overall service life. By setting a tailgate lock hook and a tailgate lock rod, the tailgate is automatically opened and closed by moving the car body forward and backward, abandoning the cumbersome hydraulic module in the traditional form of cylinder locking, and has the advantages of simple structure, higher efficiency, low cost, and not easy to damage. Description of the drawings:

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A in .

[0020] Figure 3 This is an enlarged structural schematic diagram of the tailgate of the present invention in the open state.

[0021] Figure 4 Schematic diagram of the structure of the tailgate lock hook and the tailgate lock rod in the loaded state of the present invention.

[0022] Figure 5 It is a structural schematic diagram of the tailgate lock hook and the tailgate lock rod when the present invention is in a state of being about to be unloaded.

[0023] Figure 6 This is a schematic structural diagram of the tailgate lock hook and tailgate lock rod in the unloaded state of the present invention.

[0024] In the figure, 1, frame, 2, compartment, 3, tailgate, 4, tailgate, 5, hinge, 6, tailgate lock rod, 7, side frame, 8, tailgate lock hook, 9, side beam, 10, transition slope, 11, lock rod slot, 12, lock hook slot, 13, positioning column, 14, one-way lock hook, 15, two-way lock hook. Specific implementation method:

[0025] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0026] like Figure 1-6As shown, a self-locking method for the tailgate of a translational dump semi-trailer is provided, which includes a frame 1 and a carriage 2. The carriage 2 is mounted on the frame 1 via rollers. The carriage 2 is driven to move forward and backward along the frame 1 by a cylinder mounted on the frame 1. The rear bottom of the carriage 2 is hollowed out for unloading. A tailgate 4 is mounted on the rear side of the carriage 2, and tailgate locking rods 6 are respectively provided on both sides of the bottom of the tailgate 4. A tailgate locking hook 8 is mounted in a side frame 7 at the bottom of the carriage 2 at a position corresponding to the tailgate locking rod 6 via a rotating shaft. The tailgate locking hook 8 cooperates with the tailgate locking rod 6 under the squeezing action of the side beam 9 of the frame 1 to lock the tailgate 4. When the tailgate 4 is closed, the tailgate lock hook 8 is lifted by the side beam 9, so that the tailgate lock hook 8 is engaged with the tailgate lock rod 6, thereby locking the tailgate 4; when the car body 2 is unloaded, as the car body 2 moves backward, the tailgate lock hook 8 gradually separates from the side beam 9, and loses the support of the side beam 9. The tailgate lock hook 8 relies on its own gravity to separate from the tailgate lock rod 6, thereby unlocking the tailgate 4, and the materials in the car body 2 are unloaded from the hollow bottom of the rear side of the car body 2 and the tailgate 4.

[0027] After unloading is completed, when the carriage 2 is reset, as the carriage 2 moves forward, the tailgate 4 will automatically flip up when it contacts the top of the material to avoid hard scratches with the top of the material, thereby reducing the reset resistance of the carriage 2.

[0028] The top of the tailgate 4 is connected to the crossbeam in the middle of the rear baffle 3 of the vehicle compartment 2 through a hinge 5, and the bottom of the tailgate 4 is a free end.

[0029] The hook groove of the tailgate lock hook 8 is set upward, and the bottom of the tailgate lock hook 8 contacts and cooperates with the side beam 9 of the frame 1. When locking, the tailgate lock hook 8 is lifted by the side beam 9, so that the tailgate lock hook 8 is engaged with the tailgate lock rod 6 to achieve the locking of the tailgate 4.

[0030] The tailgate lock hook 8 is in a disengaged state from the tailgate lock rod 6 when it is not subjected to the squeezing force of the side beams 9 of the vehicle frame 1. When unlocking, as the vehicle body 2 moves backward, the tailgate lock hook 8 gradually disengages from the side beams 9 of the vehicle frame 1, and loses the support of the side beams 9. The tailgate lock hook 8 relies on its own gravity to disengage from the tailgate lock rod 6, thereby unlocking the tailgate 4.

[0031] The end of the side beam 9 of the frame 1 is provided with a transition slope 10 that cooperates with the tailgate lock hook 8 to play a transition role and prevent jamming.

[0032] A lock rod groove 11 is provided at the rear end of the side frame 7 at the bottom of the vehicle body 2 for cooperating with the tailgate lock rod 6 . When the tailgate 4 is closed, the tailgate lock rod 6 is snapped into the lock rod groove 11 for positioning.

[0033] A lock hook slot 12 for the tailgate lock hook 8 to rotate is provided at the rear end of the side frame 7 at the bottom of the vehicle compartment 2, so as to facilitate the free rotation of the tailgate lock hook 8.

[0034] A plurality of positioning posts 13 are provided on the side beams 9 of the frame 1 , and a plurality of positioning lock hooks matching with the positioning posts 13 are installed on the side frame 7 at the bottom of the carriage 2 to position the movement of the carriage 2 .

[0035] The positioning lock hooks located at both ends of the side frame 7 are one-way lock hooks 14 , and the positioning lock hook located in the middle of the side frame 7 is a two-way lock hook 15 .

[0036] Working principle:

[0037] When the carriage 2 is loaded, the tailgate lock hook 8 is lifted by the side beams 9 of the frame 1, so that the tailgate lock hook 8 is engaged with the tailgate lock rod 6 to lock the tailgate 4; when the carriage 2 is unloaded, as the carriage 2 moves backward, the tailgate lock hook 8 gradually separates from the side beams 9 of the frame 1. Without the support of the side beams 9, the tailgate lock hook 8 relies on its own gravity to separate from the tailgate lock rod 6, thereby unlocking the tailgate 4, and the materials in the carriage 2 are unloaded from the hollow bottom of the rear side of the carriage 2 and the tailgate 4; after unloading is completed, when the carriage 2 is reset, as the carriage 2 moves forward, the tailgate 4 will automatically flip up when it comes into contact with the top of the materials, avoiding hard scratches with the top of the materials, thereby reducing the reset resistance of the carriage 2.

[0038] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any replacement, improvement or transformation made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0039] Any matters not described in detail in the present invention are well-known technologies to those skilled in the art.

Claims

1. A self-locking method for the tailgate of a translational dump semi-trailer, comprising a frame and a carriage, wherein the carriage is mounted on the frame through rollers, the carriage is driven by a cylinder mounted on the frame to move forward and backward along the frame, and the rear bottom of the carriage is hollowed out for unloading, characterized in that: A tailgate is installed at the rear side of the vehicle compartment, and tailgate lock rods are respectively provided on both sides of the bottom of the tailgate. A tailgate lock hook is installed via a rotating shaft at a position corresponding to the tailgate lock rod in the side frame at the bottom of the vehicle compartment. When the tailgate is closed, the tailgate lock hook is supported by the side beam so that the tailgate lock hook engages with the tailgate lock rod to lock the tailgate. When the vehicle compartment is unloaded, as the vehicle compartment moves backward, the tailgate lock hook gradually separates from the side beam, and loses the support of the side beam. The tailgate lock hook relies on its own gravity to separate from the tailgate lock rod to unlock the tailgate, and the materials in the vehicle compartment are unloaded from the hollow bottom of the rear side of the vehicle compartment and the tailgate. A lock rod groove matching with the tailgate lock rod is provided at the rear end of the side frame at the bottom of the vehicle compartment; A lock hook groove for rotating the tailgate lock hook is provided at the rear end of the side frame at the bottom of the carriage.

2. A self-locking method for the tailgate of a translational dump trailer according to claim 1, characterized in that: After unloading is completed, when the carriage is reset, as the carriage moves forward, the tailgate will automatically flip up when it contacts the top of the material to avoid hard scratches on the top of the material, thereby reducing the resistance to the carriage reset.

3. The method for self-locking the tailgate of a translational dump trailer according to claim 1, characterized in that: The top of the tailgate is connected to the vehicle compartment through a hinge, and the bottom of the tailgate is a free end.

4. The method for self-locking the tailgate of a translational dump trailer according to claim 1, characterized in that: The hook groove of the tailgate lock hook is arranged upward, and the bottom of the tailgate lock hook contacts and cooperates with the side beam of the vehicle frame.

5. The method for self-locking the tailgate of a translational dump trailer according to claim 1, characterized in that: The tailgate lock hook is in a disengaged state from the tailgate lock rod when not subjected to the squeezing force of the side beams of the vehicle frame.

6. The method for self-locking the tailgate of a translational dump trailer according to claim 1, characterized in that: The end of the side beam of the vehicle frame is provided with a transition slope surface matched with the tailgate lock hook.

7. The method for self-locking the tailgate of a translational dump trailer according to claim 1, characterized in that: A plurality of positioning posts are arranged on the side beams of the frame, and a plurality of positioning lock hooks matched with the positioning posts are installed on the side frames at the bottom of the carriage.

8. The method for self-locking the tailgate of a translational dump trailer according to claim 7, characterized in that: The positioning lock hooks located at both ends of the side frame are one-way lock hooks, and the positioning lock hook located in the middle of the side frame is a two-way lock hook.

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