Translation type self-discharging semitrailer tail door self-locking device

Abstract

The utility model relates to the technical field of dump trucks, in particular to a tail door self-locking device of a translation type dump semi-trailer. Comprising a frame and a carriage, a tail door is installed on the rear side of the carriage, the top of the tail door is connected with the carriage through hinges, the bottom of the tail door is a free end, and tail door lock rods are arranged on the two sides of the bottom of the tail door respectively; and a tail door lock hook is arranged in the side frame at the bottom of the carriage corresponding to the tail door lock rod through a rotating shaft. When materials are unloaded and the carriage moves and resets, and the tail door is in contact with the materials, the tail door can automatically turn upwards to avoid hard rubbing with the tops of the materials, the carriage is small in resetting resistance, the power loss of the oil cylinder is small, the stress of the rear side plate is small, the rear side plate is prevented from deforming, and the overall service life is guaranteed; automatic opening and closing of the tail door are achieved through front-back movement of the carriage, a tedious hydraulic module in oil cylinder locking in a traditional form is abandoned, and the tail door locking device has the advantages of being simple in structure, more efficient, low in cost, not prone to damage and the like.

Description

Technical Field:

[0001] The utility model relates to the technical field of dump trucks, in particular to a self-locking device for the tail gate of a translational dump semi-trailer. Background Art:

[0002] At present, when discharging bulk materials, in addition to the frequently used chain discharging method and push plate discharging method, a translational carriage discharging method has also emerged. For example, the patent application with the publication number CN114559871A discloses a two-stage linkage rolling and sliding discharging device for a dump semi-trailer. On the one hand, the carriage is driven to move on the frame by an oil cylinder, and on the other hand, the pushing plate is driven to move in the carriage by an oil cylinder. The bottom of the rear side of the carriage is hollowed out, and the goods fall from the hollowed-out part to complete the unloading. This discharging method has the following disadvantages in specific practical applications: Since the entire rear side plate of the carriage is a whole fixed baffle, when the bulk materials are unloaded, the bulk materials naturally pile up into a cone shape, and the top of the materials has exceeded the lower half of the rear side plate. When the carriage moves back to its original position, the top of the materials will rub against the lower half of the rear side plate, resulting in a large resistance to the carriage reset, a large power loss of the oil cylinder, the bottom of the rear side plate will scrape the top of the materials flat, the rear side plate is subjected to large forces, and it is easy to cause deformation of the rear side plate over time, affecting the overall service life. Although there is a tail gate at the lower half of the rear side plate of some dump trucks, the current tail gate either needs to be manually locked and unlocked, which is inconvenient to operate, or is locked by a hydraulic cylinder, having the disadvantages of complex structure, high cost, and easy damage.

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

[0004] The utility model aims to make up for the deficiencies of the prior art and provides a self-locking device for the tail gate of a translational dump semi-trailer, which solves the problem that the previous rear side plate, being a whole fixed baffle, is prone to rubbing against the top of the materials, and also solves the problems of the previous tail gate locking mechanism, such as complex structure, inconvenient operation, high cost, and easy damage.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0006] A self-locking device for the tail gate of a translational dump semi-trailer includes a frame and a carriage. The carriage is installed on the frame through rollers and is driven by an oil cylinder installed on the frame to move back and forth along the frame. The bottom of the rear side of the carriage is hollowed out for discharging. A tail gate is installed at the rear side of the carriage. The top of the tail gate is connected to the carriage through hinges, and the bottom of the tail gate is a free end. Tail gate lock rods are respectively arranged on both sides of the bottom of the tail gate. Tail gate lock hooks are installed on the side frame of the carriage at positions corresponding to the tail gate lock rods through rotating shafts. The tail gate lock hooks cooperate with the tail gate lock rods under the extrusion of the side beam of the frame to lock the tail gate.

[0007] The hook groove of the tail door lock hook is arranged upward, and the bottom of the tail door lock hook is in contact and cooperation with the side beam of the vehicle frame.

[0008] When the tail door lock hook is not under the extrusion pressure of the side beam of the vehicle frame, it is in a disengaged state from the tail door lock rod.

[0009] The end of the side beam of the vehicle frame is provided with a transition slope surface that cooperates with the tail door lock hook.

[0010] The rear end of the side border of the bottom of the carriage is provided with a lock rod groove that cooperates with the tail door lock rod.

[0011] The rear end of the side border of the bottom of the carriage is provided with a hook groove for the tail door lock hook to rotate.

[0012] A plurality of positioning columns are provided on the side beam of the vehicle frame, and a plurality of positioning lock hooks that cooperate with the positioning columns are installed on the side border of the bottom of the carriage.

[0013] The positioning lock hooks located at both ends of the side border are one-way lock hooks, and the positioning lock hooks located in the middle of the side border are two-way lock hooks.

[0014] The present utility model adopts the above scheme and has the following advantages:

[0015] By installing a tail door at the rear side of the carriage, the top of the tail door is connected to the carriage through a hinge, and the bottom of the tail door is a free end. When the carriage moves back to its original position after the material unloading is completed, the tail door will automatically turn up when it contacts the material, avoiding hard rubbing against the top of the material. The resistance of the carriage to return to its original position is small, the power loss of the oil cylinder is small, the force on the rear side plate is small, avoiding deformation of the rear side plate, and ensuring the overall service life; by setting the tail door lock hook and the tail door lock rod, the automatic opening and closing of the tail door are realized through the forward and backward movement of the carriage, abandoning the cumbersome hydraulic module in the traditional oil cylinder locking form, and having the advantages of simple structure, higher efficiency, low cost, and not being easily damaged. Description of the drawings:

[0016] Figure 1 It is a schematic structural diagram of the present utility model.

[0017] Figure 2 is Figure 1 The enlarged structural schematic diagram of part A in

[0018] Figure 3 It is the enlarged structural schematic diagram of the present utility model in the state where the tail door is open.

[0019] Figure 4 It is the structural schematic diagram of the tail door lock hook and the tail door lock rod of the present utility model in the loaded state.

[0020] Figure 5This is a schematic structural diagram of the tail door lock hook and the tail door lock rod when the present utility model is about to be unloaded.

[0021] Figure 6 This is a schematic structural diagram of the tail door lock hook and the tail door lock rod when the present utility model is unloaded.

[0022] In the figure, 1 is the vehicle frame, 2 is the carriage, 3 is the rear baffle, 4 is the tail door, 5 is the hinge, 6 is the tail door lock rod, 7 is the side frame, 8 is the tail door lock hook, 9 is the side beam, 10 is the transition slope, 11 is the lock rod groove, 12 is the lock hook groove, 13 is the positioning post, 14 is the one-way lock hook, and 15 is the two-way lock hook. Specific embodiments:

[0023] To clearly illustrate the technical features of this solution, the present utility model will be elaborated in detail below through specific embodiments and in conjunction with its accompanying drawings.

[0024] As Figures 1-6 shown, a self-locking device for the tail door of a translational dump semi-trailer includes a vehicle frame 1 and a carriage 2. The carriage 2 is installed on the vehicle frame 1 through rollers, and the carriage 2 is driven by an oil cylinder installed on the vehicle frame 1 to move back and forth along the vehicle frame 1. The bottom of the rear side of the carriage 2 is hollowed out for unloading. A tail door 4 is installed on the lower half of the rear baffle 3 at the rear side of the carriage 2. The top of the tail door 4 is connected to the cross beam in the middle of the rear baffle 3 through a hinge 5. The bottom of the tail door 4 is a free end, and tail door lock rods 6 are respectively provided on both sides of the bottom of the tail door 4; a tail door lock hook 8 is installed through a rotating shaft at a position corresponding to the tail door lock rod 6 inside the side frame 7 at the bottom of the carriage 2. The tail door lock hook 8 cooperates with the tail door lock rod 6 under the extrusion of the side beam 9 of the vehicle frame 1 to lock the tail door 4.

[0025] The hook groove of the tail door lock hook 8 is arranged upwards, and the bottom of the tail door lock hook 8 is in contact and cooperation with the side beam 9 of the vehicle frame 1. When locking, the side beam 9 lifts the tail door lock hook 8, so that the tail door lock hook 8 engages with the tail door lock rod 6 to lock the tail door 4.

[0026] When the tail door lock hook 8 is not under the extrusion force of the side beam 9 of the vehicle frame 1, it is in a disengaged state from the tail door lock rod 6. When unlocking, as the carriage 2 moves backward, the tail door lock hook 8 gradually disengages from the side beam 9 of the vehicle frame 1, losing the support of the side beam 9. The tail door lock hook 8 disengages from the tail door lock rod 6 by its own gravity to unlock the tail door 4.

[0027] The end of the side beam 9 of the vehicle frame 1 is provided with a transition slope 10 that cooperates with the tail door lock hook 8 to play a transition role and prevent jamming.

[0028] The rear end of the side frame 7 at the bottom of the carriage 2 is provided with a lock rod groove 11 that cooperates with the tail door lock rod 6. When the tail door 4 is closed, the tail door lock rod 6 will be stuck into the lock rod groove 11 for positioning.

[0029] A lock hook groove 12 for the tailgate lock hook 8 to rotate is provided at the rear end of the side border 7 at the bottom of the carriage 2, so as to facilitate the free rotation of the tailgate lock hook 8.

[0030] A number of positioning posts 13 are provided on the side beam 9 of the vehicle frame 1, and a number of positioning lock hooks cooperating with the positioning posts 13 are installed on the side border 7 at the bottom of the carriage 2, which can position the movement of the carriage 2.

[0031] The positioning lock hooks at both ends of the side border 7 are one-way lock hooks 14, and the positioning lock hooks in the middle of the side border 7 are two-way lock hooks 15.

[0032] Working principle:

[0033] When the carriage 2 is loaded, the tailgate lock hook 8 is lifted by the side beam 9 of the vehicle frame 1, so that the tailgate lock hook 8 engages 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 disengages from the side beam 9 of the vehicle frame 1 and loses the support of the side beam 9. The tailgate lock hook 8 disengages from the tailgate lock rod 6 by its own gravity to unlock the tailgate 4, and the materials in the carriage 2 are unloaded from the hollow at the rear bottom of the carriage 2 and the tailgate 4; after the unloading is completed, when the carriage 2 is reset, as the carriage 2 moves forward, when the tailgate 4 contacts the top of the materials, it will automatically turn up to avoid hard rubbing against the top of the materials, so as to reduce the reset resistance of the carriage 2.

[0034] The above specific implementation manners cannot be used as a limitation to the protection scope of the present utility model. For those skilled in the art of this technology, any alternative improvement or transformation made to the implementation manner of the present utility model falls within the protection scope of the present utility model.

[0035] Those parts not detailed in the present utility model are all well-known technologies to those skilled in the art of this technology.

Claims

1. A self-locking device 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, and 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, and is characterized in that: A tailgate is installed at the rear side of the vehicle compartment, the top of the tailgate is connected to the vehicle compartment through a hinge, the bottom of the tailgate is a free end, and tailgate lock rods are respectively provided on both sides of the bottom of the tailgate; a tailgate lock hook is installed through a rotating shaft at the position of the tailgate lock rod in the side frame at the bottom of the vehicle compartment corresponding to the position of the tailgate lock rod, and the tailgate lock hook cooperates with the tailgate lock rod under the squeezing action of the side beam of the frame to lock the tailgate.

2. The self-locking device for 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.

3. The self-locking device for 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.

4. The self-locking device for 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.

5. The self-locking device for the tailgate of a translational dump trailer according to claim 1, characterized in that: 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.

6. The self-locking device for the tailgate of a translational dump trailer according to claim 1, characterized in that: 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.

7. The self-locking device for 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 self-locking device for 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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