Hook door of refrigerator car

Abstract

The utility model discloses a refrigerator car hook door which comprises a compartment door movably hinged to a compartment through a hinge, and a middle lock rod and an edge lock rod are rotationally installed in the middle of the compartment door and the position, close to the edge, of the side away from the hinge through hoops respectively. Small lock heads with bayonets facing one side of the hinge are fixed to the two ends of the middle lock rod, large lock heads with bayonets facing one side of the hinge are fixed to the two ends of the edge lock rod, and small lock seats and large lock seats which are movably connected with the small lock heads and the large lock heads in a clamped mode are fixed to the carriage. When the door handle is pulled outwards, the middle lock rod and the edge lock rod synchronously rotate through transmission of the movable connecting rod, the door is opened in the middle and the edge positions above and below the compartment door through rotating prying of the small lock head and the large lock head, the effect of synchronously pulling and opening the door outwards in the middle and the edge of the compartment door is achieved, more labor is saved in door opening, and the door opening efficiency is improved. Meanwhile, external force borne by the compartment door is dispersed, local stress is avoided, the compartment door is protected, the compartment door is not prone to deformation, and the sealing effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of refrigerated truck technology, specifically to a hook door for a refrigerated truck. Background Technology

[0002] Refrigerated trucks are specialized vehicles used to transport goods requiring refrigeration. They are commonly used to transport various goods that need refrigeration, including fresh fruits and vegetables, frozen foods, dairy products, animal and plant vaccines, biochemical products, and pharmaceuticals. The truck body uses high-quality insulation materials, and the manufacturing techniques include segmented "sandwich" panel bonding, injection foaming, integral frame injection foaming, and vacuum adsorption bonding to ensure effective thermal insulation.

[0003] Refrigerated truck hook doors are a common type of container door structure. Typically, a locking bar is installed only near the edge of the door. The locking bar's end engages with a lock seat on the truck bed to lock the door. To lock or unlock, the door handle on the outside of the locking bar is moved inward or outward, making it relatively convenient to use.

[0004] However, when this door structure is directly replicated on refrigerated trucks, some subtle changes occur. The interior temperature of refrigerated trucks is low, and after the door is closed, the corner formed by the inner wall of the compartment and the edge of the door easily traps moisture from the air, leading to frost and ice buildup. Opening the door then becomes quite difficult. When operating, pulling the door handle inward causes the locking lever to rotate, separating the lock head from the lock seat, while simultaneously prying the lock seat backward. This not only makes opening the door inconvenient due to frost and ice, but also causes the door to deform from the force of the locking lever due to prolonged prying, resulting in a loose door closure and affecting the internal refrigeration effect. Therefore, there is an urgent need for a convenient-to-open hook door designed specifically for refrigerated trucks. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a refrigerated truck hook door, which solves the problems of existing refrigerated truck hook doors not opening after refrigeration and the door easily deforming, affecting the seal.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A refrigerated truck hook door includes a door that is hinged to the truck bed. A middle locking rod and an edge locking rod are respectively rotatably installed on the middle part of the door and on the side away from the hinge near the edge by clamps. Small lock heads with their latches facing the hinge are fixed at both ends of the middle locking rod, and large lock heads with their latches facing the hinge are fixed at both ends of the edge locking rod. Small lock seats and large lock seats that are movably engaged with the small lock heads and large lock heads are respectively fixed on the truck bed.

[0008] A movable connecting rod is movably hinged between the middle locking rod and the edge locking rod. A door handle is movably hinged to the side of the middle locking rod near the edge locking rod. A handle seat is fixed on the door and snapped onto the outside of the bottom of the door handle. A pressure handle is provided above the handle seat, which is rotatably connected to the door and movably snapped onto the outside of the top of the door handle.

[0009] Preferably, the intermediate locking rod is located at the position corresponding to the vertical center axis of the door, and the edge locking rod is located at a position no more than ten centimeters away from the edge of the door on the side away from the hinge.

[0010] Preferably, the intermediate locking rod and the edge locking rod have the same dimensions, the ratio of the distance between the edge locking rod and the intermediate locking rod and the hinge is equal to the ratio of the latching depth of the large lock head to the latching depth of the small lock head, and the dimensions of the small lock seat and the large lock seat are adapted to the small lock head and the large lock head, respectively.

[0011] Preferably, the two ends of the movable connecting rod are movably connected to the hinge seats fixed on the middle locking rod and the edge locking rod, respectively, and the hinge seats on the middle locking rod and the edge locking rod are respectively located on the side of the front of the middle locking rod and the edge locking rod that is biased away from the hinge.

[0012] Preferably, both ends of the movable link are provided with backward-bending curved portions, and the curved portions of the movable link are adapted to the surface curvature of the intermediate locking rod and the edge locking rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] When the door handle is pulled outwards, the central locking rod and the edge locking rod rotate synchronously through a movable connecting rod. At the center and edge of the top and bottom of the door, the small and large locks rotate and pry to open the door, achieving the effect of pulling the door outwards simultaneously from the center and edge of the door. This not only makes opening the door easier but also disperses the external force on the door, avoiding localized stress, protecting the door from deformation, and ensuring a good seal. This solves the problems of existing refrigerated truck hook doors that remain open after refrigeration and doors that are prone to deformation, affecting the seal. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial structural diagram of the corresponding positions of the small lock head, large lock head, and door handle of this utility model;

[0017] Figure 3 This is a partial top view of the corresponding positions of the small lock, large lock, and movable linkage of the compartment door in the closed state of this utility model.

[0018] Figure 4This is a top view of a partial structure of the small lock, large lock, and movable linkage in the open state of the door of this utility model.

[0019] In the diagram: 1. Hinge; 2. Carriage; 3. Carriage door; 4. Clamp; 5. Middle locking bar; 6. Edge locking bar; 7. Small padlock; 8. Large padlock; 9. Small padlock seat; 10. Large padlock seat; 11. Movable connecting rod; 111. Bend; 12. Door handle; 13. Handle seat; 14. Press handle; 15. Hinge seat. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1-4 As shown, this utility model provides a technical solution: a refrigerated truck hook door, including a door 3 that is movably hinged to the truck body 2 via a hinge 1. A middle locking rod 5 and an edge locking rod 6 are respectively rotatably installed on the middle part of the door 3 and near the edge on the side away from the hinge 1 via a clamp 4. The middle locking rod 5 is located at the position corresponding to the vertical center axis of the door 3, and the edge locking rod 6 is located at a position no more than 10 centimeters away from the edge of the door 3 on the side away from the hinge 1, which are used to lock the middle part and the edge of the door 3 respectively, thereby improving the sealing effect;

[0022] Both ends of the middle locking rod 5 are fixed with small lock heads 7 facing the hinge 1, and both ends of the edge locking rod 6 are fixed with large lock heads 8 facing the hinge 1. Small lock seats 9 and large lock seats 10 that are movably engaged with the small lock heads 7 and large lock heads 8 are fixed on the carriage 2 respectively.

[0023] The middle locking rod 5 and the edge locking rod 6 have the same specifications and dimensions. The ratio of the distance between the edge locking rod 6 and the middle locking rod 5 and the hinge 1 is equal to the ratio of the latching depth of the large lock head 8 to the latching depth of the small lock head 7. The specifications and dimensions of the small lock seat 9 and the large lock seat 10 are adapted to the small lock head 7 and the large lock head 8 respectively. The top view position and size relationship form a mathematically similar triangle. The middle locking rod 5 and the edge locking rod 6 can be driven to rotate synchronously through a door handle 12 and a movable connecting rod 11. The small lock head 7 and the large lock head 8 disengage from the small lock seat 9 and the large lock seat 10 synchronously and pry backward during the rotation. The reverse force helps to open the door 3.

[0024] A movable connecting rod 11 is movably hinged between the middle locking rod 5 and the edge locking rod 6. Both ends of the movable connecting rod 11 are provided with backward-bending curved portions 111. The curved portions 111 of the movable connecting rod 11 are adapted to the surface curvature of the middle locking rod 5 and the edge locking rod 6. Both ends of the movable connecting rod 11 are movably connected to the hinge seats 15 fixed on the middle locking rod 5 and the edge locking rod 6, respectively. The hinge seats 15 on the middle locking rod 5 and the edge locking rod 6 are respectively located on the side of the front of the middle locking rod 5 and the edge locking rod 6 that is biased away from the hinge 1, so as to ensure that the rotation direction and trend of the edge locking rod 6 are determined when subjected to the pulling force and pushing force of the movable connecting rod 11, and to avoid jamming.

[0025] A door handle 12 is movably hinged to one side of the middle locking rod 5 near the edge locking rod 6. A handle seat 13 is fixed on the door 3 and is snapped onto the outside of the bottom of the door handle 12. A pressure handle 14 is provided above the handle seat 13, which is rotatably connected to the door 3 and movably snapped onto the outside of the door handle 12.

[0026] Working principle:

[0027] Flip the lever 14 upwards to open it, then slightly flip the door handle 12 upwards to move it above the handle seat 13. Then, pull the door handle 12 outwards to open the door. In the case of double doors, both door handles 12 can be pulled outwards simultaneously to open the door. The middle locking rod 5 and the edge locking rod 6 rotate synchronously through the movable connecting rod 11. At the middle and edge positions above and below the door 3, the small lock head 7 and the large lock head 8 rotate and separate from the small lock seat 9 and the large lock seat 10, and simultaneously pry the fixing plates of the small lock seat 9 and the large lock seat 10 backwards. Through the reverse force, the middle locking rod 5 and the edge locking rod 6 are pushed forward, and the middle locking rod 5 and the edge locking rod 6 pull the door 3 forward to open the door. This achieves the effect of pulling outwards synchronously at the middle and edge of the door 3. Through multiple prying forces, not only is it easier to open the door, but it also disperses the local external force on the door 3 and protects the door 3.

[0028] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A refrigerated vehicle tailgate comprising a door (3) mounted by means of a hinge (1) in a hingedly movable manner on a vehicle body (2), characterized in that: The middle part of the door (3) and the edge of the door (1) are respectively equipped with a middle locking rod (5) and an edge locking rod (6) by means of a clamp (4). The two ends of the middle locking rod (5) are fixed with small lock heads (7) facing the hinge (1). The two ends of the edge locking rod (6) are fixed with large lock heads (8) facing the hinge (1). The carriage (2) is respectively fixed with small lock seats (9) and large lock seats (10) that are movably engaged with the small lock heads (7) and large lock heads (8). A movable connecting rod (11) is movably hinged between the middle locking rod (5) and the edge locking rod (6). A door handle (12) is movably hinged on the side of the middle locking rod (5) near the edge locking rod (6). A handle seat (13) is fixed on the door (3) and snapped onto the outside of the bottom of the door handle (12). A pressure handle (14) is provided above the handle seat (13) and is rotatably connected to the door (3) and movably snapped onto the outside of the door handle (12).

2. A refrigerated vehicle dock door according to claim 1, wherein: The middle locking rod (5) is set at the position corresponding to the vertical centerline of the door (3), and the edge locking rod (6) is set at a position no more than ten centimeters away from the edge of the door (3) on the side away from the hinge (1).

3. A refrigerated vehicle dock door as in claim 1, wherein: The middle locking bar (5) and the edge locking bar (6) have the same dimensions. The ratio of the distance between the edge locking bar (6) and the middle locking bar (5) and the hinge (1) is equal to the ratio of the depth of the large lock head (8) to the depth of the small lock head (7). The dimensions of the small lock seat (9) and the large lock seat (10) are adapted to the small lock head (7) and the large lock head (8), respectively.

4. A refrigerated vehicle dock door according to claim 1, wherein: The two ends of the movable connecting rod (11) are movably connected to the hinge seats (15) fixed on the middle locking rod (5) and the edge locking rod (6), respectively. The hinge seats (15) on the middle locking rod (5) and the edge locking rod (6) are respectively located on the side of the front of the middle locking rod (5) and the edge locking rod (6) that is biased away from the hinge (1).

5. A refrigerated vehicle door according to claim 1, characterized in that: Both ends of the movable link (11) are provided with backward-bending curved portions (111), and the curved portions (111) of the movable link (11) are adapted to the surface curvature of the middle locking rod (5) and the edge locking rod (6).

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