Semitrailer carriage door locking device and semitrailer carriage

Abstract

The utility model provides a semitrailer box door locking device and a semitrailer box, the semitrailer box door locking device comprises a box door and a pair of stand columns, one side of the box door is rotatably matched with one stand column through a hinge assembly, the other stand column is rotatably provided with a pair of handles, and the other side of the box door is provided with flat hooks corresponding to the positions of the handles; a side opening groove matched with the handle is transversely formed in the outer side of the flat hook. According to the semitrailer box door locking device, the box door locking function is achieved, the box door can be lifted through the handle, and the function of preventing the box door from bouncing is achieved.

Description

Technical Field

[0001] The utility model relates to the field of semi-trailer carriages, and specifically, to a locking device for a semi-trailer carriage door and a semi-trailer carriage. Background Art

[0002] The opening structure of a semi-trailer carriage door is usually that one end of the door is fixed by a hinge, and the other end is locked by a handle and a flat hook. To prevent the carriage door from sagging during vehicle operation and avoid damage to the door hinge caused by the cantilever moment of the carriage door, the commonly used improvement measure at present is to weld a carriage door bracket on the lower side of the carriage door at the hinge end of the handle and on the column. However, this structure can only lock but not lift the carriage door, cannot protect the carriage door hinge, and cannot prevent damage to the hinge caused by the cantilever of the carriage door. At the same time, since the conventional flat hook does not have the function of preventing the carriage door from bouncing, during vehicle operation, it is impossible to prevent the carriage door from making abnormal noises due to road bumps. In addition, the carriage door bracket welded on the column occupies the door opening space, affecting the loading and unloading of goods. When loading and unloading goods, the goods are easily scratched by the carriage door bracket and damaged, and the overall structure is complex, with a large amount of production, processing and welding, a large self-weight, and a high cost.

[0003] The utility model patent with the authorization announcement number CN209382110U discloses a semi-trailer movable column, including a rear column installed at the rear end of the carriage floor and a movable column arranged parallel to the rear column. A railing is hinged to the rear column, and the free end of the railing is connected to the movable column through at least one railing door knife and a door handle, wherein the railing door knife is located at the free end of the railing, and the door handle is installed on the movable column. This semi-trailer movable column can realize various opening methods of the semi-trailer carriage and meet the loading and unloading requirements of different goods. However, this semi-trailer movable column still has the defect that it can only lock but not lift the carriage door. Content of the Utility Model

[0004] In order to achieve the functions of both locking the carriage door, lifting the carriage door by relying on the handle, and preventing the carriage door from bouncing, the technical solution adopted by the utility model is: a locking device for a semi-trailer carriage door, including a carriage door and a pair of columns. One side of the carriage door is rotationally matched with one of the columns through a hinge assembly, and a pair of handles are rotatably arranged on the other column. A flat hook is arranged at the corresponding position of the other side of the carriage door to the handle.

[0005] A side opening groove matched with the handle is horizontally arranged on the outer side of the flat hook.

[0006] Based on the above, in order to facilitate the rotation and support of the carriage door, the handle is an L-shaped handle, and an installation hole for one end of the L-shaped handle to pass through is opened on the column. The connecting end of the handle is rotationally matched with the installation hole.

[0007] Based on the above, the hinge assembly includes a hinge bushing installed on the column and a hinge rotating shaft installed on the box door, and the hinge rotating shaft is rotatably matched with the hinge bushing.

[0008] Based on the above, in order to facilitate the lateral opening of the box door, the side opening groove is a side U-shaped opening groove.

[0009] Based on the above, in order to increase the locking stability of the box door, the transverse length value of the side opening groove is greater than the diameter value of the handle.

[0010] Based on the above, on both sides of the column, there are vertically arranged flanges for holding the box door.

[0011] The present utility model also provides a semi-trailer carriage, and the semi-trailer carriage is equipped with the above-mentioned semi-trailer box door locking device.

[0012] The present utility model has substantial features and progress compared with the prior art. Specifically, the semi-trailer box door locking device and the semi-trailer carriage provided by the present utility model can distribute the weight at the handle end of the box door on the handle, which not only has the function of locking the box door, but also can rely on the handle to lift the box door, and can protect the box door hinge to avoid damage to the hinge caused by the cantilever of the box door. At the same time, this structure also has the function of preventing the box door from bouncing. During the running of the vehicle, it can not only prevent the box door from sagging, but also prevent the box door from bouncing upward, avoiding abnormal noises of the box door due to road conditions bumps. And because the box door bracket welded on the column is cancelled, compared with the conventional structure, the new structure increases the loading and unloading space on the premise of the same door opening width, the goods loading and unloading is smooth, and the goods are avoided from being scratched.

[0013] Furthermore, by setting the opening direction of the handle to be horizontal forward or obliquely upward, when the box door is opened and closed, only need to rotate the handle upward by greater than or equal to 90 degrees, and it is not necessary to rotate to the highest position to open and close the box door. This structure is not restricted by the operator's height, and the operation is simple and fast. At the same time, the box door bracket can also be omitted, the overall structure is simple, the production processing and welding amount are small, the working hours are small, the efficiency is high, the overall self-weight of the box door is light, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the semi-trailer box door locking device provided by the present utility model.

[0015] Figure 2 is a schematic diagram of a partial structure of the semi-trailer box door locking device provided by the present utility model.

[0016] In the figure: 1, column; 2, handle; 3, flat hook; 4, side opening groove; 5, box door; 6, hinge bushing; 7, hinge rotating shaft; 8, flange. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following is a further detailed description of the technical solution of the present utility model through specific embodiments.

[0018] Embodiment 1

[0019] This embodiment provides a locking device for a semi-trailer box door. As shown in Figure 1 、 Figure 2 , it includes a box door 5 and a pair of columns 1. One side of the box door 5 is rotationally matched with one of the columns 1 through a hinge assembly, and a pair of handles 2 are rotatably arranged on the other column 1. A flat hook 3 is arranged at the corresponding position of the other side of the box door 5 with respect to the handle 2.

[0020] A side opening groove 4 that cooperates with the handle 2 is horizontally arranged on the outer side of the flat hook 3. Among them, the side opening groove 4 is a side U-shaped opening groove, and the flat hook can be directly made of a steel plate.

[0021] Specifically, in this embodiment, the handle is an L-shaped handle, and an installation hole for one end of the L-shaped handle to pass through is opened on the column. One end of the handle is rotationally matched with the installation hole.

[0022] The hinge assembly includes a hinge bushing 6 installed on the column and a hinge rotating shaft 7 installed on the box door. The hinge rotating shaft is rotationally matched with the hinge bushing.

[0023] Embodiment 2

[0024] This embodiment provides a locking device for a semi-trailer box door. The main difference from Embodiment 1 is that in this embodiment, the horizontal length value of the side opening groove is greater than the diameter value of the handle. Flanges 8 for holding the box door are vertically arranged on both sides of the column.

[0025] Embodiment 3

[0026] This embodiment provides a semi-trailer box door, and the semi-trailer box door is installed with the locking device for a semi-trailer box door provided in Embodiment 1 or Embodiment 2.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them; although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present utility model or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present utility model, they should all be covered within the scope of the technical solutions claimed by the present utility model.

Claims

1. A semi-trailer door locking device, characterized in that: It comprises a door and a pair of columns, one side of the door is rotatably matched with one of the columns through a hinge assembly, a pair of handles are rotatably provided on the other column, and a flat hook is provided on the other side of the door corresponding to the handle position; The outer side of the flat hook is laterally provided with a side opening groove matched with the handle.

2. The semi-trailer door locking device according to claim 1, characterized in that: The handle is an L-shaped handle, and a mounting hole for one end of the L-shaped handle to pass through is opened on the column, and the handle is rotatably matched with the mounting hole.

3. The semi-trailer door locking device according to claim 2, characterized in that: The hinge assembly comprises a hinge sleeve mounted on the column and a hinge shaft mounted on the door, and the hinge shaft is rotatably matched with the hinge sleeve.

4. The semi-trailer door locking device according to claim 3, characterized in that: The side opening groove is a side U-shaped opening groove.

5. The semi-trailer door locking device according to claim 4, characterized in that: The lateral length of the side opening slot is greater than the diameter of the handle.

6. The semi-trailer door locking device according to claim 5, characterized in that: Folding edges for holding the box door are vertically arranged on both sides of the column.

7. A semi-trailer box, characterized in that: The semi-trailer box is equipped with the semi-trailer box door locking device according to any one of claims 1 to 6.

Images