Truck door lock convenient to open and close

Abstract

A truck door lock convenient to open and close comprises a door rod and a lock rod head, the door rod is arranged on a carriage, the lock rod head is arranged at the bottom of the door rod, the lock rod head is fixedly connected with the door rod, the lock rod head comprises a hollow rod and a movable rod, a limiting ring is arranged on the outer side wall of the hollow rod, the movable rod is arranged in the hollow rod, and the movable rod is installed in the hollow rod in a sliding mode. A limiting mechanism is arranged at the top of the movable rod and fixedly connected with the movable rod, and a lock is arranged at the bottom of the movable rod and fixedly connected with the movable rod. Through the arrangement of the movable rod and the hollow rod, the lock head at the bottom of the movable rod can have a certain up-and-down moving distance, so that when the compartment door deforms, the compartment of the refrigerator car can be kept sealed without replacement or repair, and the durability of the refrigerator car is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerated trucks, and particularly relates to a truck door lock which is convenient to open and close. Background Art

[0002] A refrigerated truck is a closed van used to transport frozen or fresh goods. A refrigeration unit is installed in the carriage, and the refrigeration unit can lower the temperature in the carriage, so as to freeze or preserve the goods in the carriage. During the use of the existing refrigerated trucks, the door body on the carriage is prone to a certain degree of deformation due to frequent opening and closing. In this case, the original door lock cannot lock it. If the door body of the carriage is repaired, both the repair time and the repair cost are a large expense. Moreover, due to the characteristics of the refrigerated truck, its carriage needs to be kept airtight. If the door cannot be locked, the goods in the carriage cannot be kept at an appropriate temperature. Therefore, there is an urgent need in the market for a truck door lock that can still be locked after the deformation of the carriage door body to ensure that the carriage remains sealed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a truck door lock which is convenient to open and close, so as to solve the problems existing in the above-mentioned prior art.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions:

[0005] A truck door lock which is convenient to open and close includes a door rod and a lock rod head. The door rod is arranged on the carriage. A lock rod head is arranged at the bottom of the door rod. The lock rod head is fixedly connected with the door rod. The lock rod head includes a hollow rod and a movable rod. A limiting ring is arranged on the outer side wall of the hollow rod. A movable rod is arranged in the hollow rod. The movable rod is slidably installed in the hollow rod. A limiting mechanism is arranged at the top of the movable rod. The limiting mechanism is fixedly connected with the movable rod. A lock head is arranged at the bottom of the movable rod. The lock head is fixedly connected with the movable rod.

[0006] By adopting the above technical solutions, the door rod itself is restricted on the carriage door. A clamping mechanism is arranged at the lower end of the carriage door, which is specially used to fix the door rod. The lock head at the bottom of the door rod is used to engage with the positioning block at the bottom of the rear side of the carriage. An ordinary lock rod head cannot move up and down and is an integral design with the door rod. Through the cooperation of the hollow rod and the movable rod, the lock head at the bottom of the door rod can move up and down within a certain distance. Therefore, it can adapt to the natural deformation of the door body during long-term use. When the groove on the lock head does not match the positioning block, only need to gently lift the movable rod by hand to adjust the position of the lock head for engagement. After the engagement, fix the door rod with the clamping mechanism to complete the sealing and fixing of the carriage door. In this way, it is not necessary to affect the operation of the entire refrigerated truck due to the deformation of the carriage door, reducing the use cost of the driver and greatly improving the durability of the refrigerated truck body.

[0007] In a further embodiment, a limiting hole is provided on the outer side wall of the hollow rod. The limiting mechanism includes a sliding column and a plug. The plug is coaxially arranged with the limiting hole. A limiting groove is provided on one side of the sliding column for accommodating the plug, and the plug is fixedly welded to the hollow rod.

[0008] By adopting the above technical solution, the limiting mechanism mainly relies on the cooperation between the sliding column at the top of the movable rod and the limiting hole on the outer side wall of the hollow rod. After inserting the plug into the limiting hole and ensuring that the plug enters the limiting groove on the sliding column, the plug and the limiting column can be fixedly welded by full welding to manufacture a sturdy and durable limiting mechanism, enabling the lock head at the bottom of the movable rod to obtain a certain amount of movement allowance.

[0009] In a further embodiment, an acute-angle rounding structure is provided at the connection between the bottom of the sliding column and the top of the movable rod.

[0010] By adopting the above technical solution, since the movable rod needs to cooperate with the hollow rod for a long time, collisions and frictions are inevitable during use. Setting the acute-angle rounding structure can reduce the probability of wear between the two and make the entire use process smoother and more reliable.

[0011] In a further embodiment, a shaft hole is provided inside the movable rod.

[0012] By adopting the above technical solution, the inside of the movable rod is also hollow, which helps to reduce the overall weight of the movable rod. Since the movable rod is integrally arranged at the bottom of the hollow rod, when in use, the movable rod often needs to be pushed up. Therefore, if the weight of the movable rod is high, it will be very inconvenient during use. And the material strength of the movable rod itself is already sufficient, so the hollow design can improve the user experience.

[0013] In a further embodiment, a first groove is provided on the left side of the lock head, and a second groove is provided on the right side of the lock head.

[0014] By adopting the above technical solution, grooves are provided on both sides of the lock head. Since during the assembly of the refrigerated truck, it is necessary to install according to the position of the limiting groove and the positioning hole on the outer side wall of the hollow rod, having lock heads on both sides can reduce the assembly difficulty and avoid the problem that the lock head cannot be corresponding after setting the door rod, improving the assembly efficiency and production efficiency.

[0015] In a further embodiment, both the first groove and the second groove are provided with acute-angle rounding structures.

[0016] By adopting the above technical solution, the acute angle rounding structure can effectively reduce sharp edges and corners. Although the lock head is preferably adjusted upward by holding the bottom by hand, in actual operation, users often do not use it according to the designed idea. Therefore, the acute angle rounding structure can prevent the user's hand from being bumped or scratched when touching the inner wall of the lock head, and enable the lock head to better fit the positioning hole at the bottom end of the carriage door, and can be snapped together with one click.

[0017] In summary, the utility model has the following beneficial effects:

[0018] 1. By setting the movable rod and the hollow rod, a freely variable extension length can be added to the door rod that could not be freely extended and shortened originally. The top end of the movable rod is arranged inside the hollow rod, which can play a role in adjusting the bottom lock head. The lock head at the bottom of the movable rod cooperates with the positioning hole at the bottom end of the carriage door through the groove on the lock head to fix the whole carriage door of the refrigerated truck. And the fact that the length of the lock rod head can be freely changed enables the door rod to adapt to the carriage door that has undergone a certain deformation, improving the durability of the refrigerated truck, keeping the whole carriage closed, and achieving the effect of extending the overall service life of the refrigerated truck;

[0019] 2. By setting the limiting mechanism, through the mutual cooperation of the limiting groove on the side wall of the sliding column and the positioning hole on the side wall of the hollow rod, a pin is used to complete the limitation of the movable rod and the hollow rod, so that the movable rod can only slide within the length distance of the limiting groove. At the same time, after the pin is fully welded in the positioning hole, it can also ensure that the movable rod cannot fall off. The pure mechanical structure is simple and durable, achieving the effect of effectively improving the reliability of the limiting mechanism;

[0020] 3. By setting the first groove, the second groove and the acute angle rounding structure, the grooves arranged on both sides of the lock head can cooperate with the fixing blocks at the bottom end of the carriage door. The acute angle rounding design enables the grooves to be more easily snapped onto the fixing blocks without the need for very accurate alignment. Since the positions of the movable rod and the hollow rod can be adjusted themselves, the acute angle rounding design can assist the lock head to slide onto the fixing block within a certain height difference, achieving the effect of facilitating user use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall structural schematic diagram of a freight car door lock that is convenient to open and close in the utility model;

[0022] Figure 2 is the internal structural schematic diagram of a freight car door lock that is convenient to open and close in the utility model for showing the connection relationship between the lock rod head, the movable rod and the hollow rod.

[0023] In the figure, 1 is the door rod; 2 is the lock rod head; 21 is the hollow rod; 22 is the movable rod; 3 is the limit ring; 4 is the limit mechanism; 41 is the sliding column; 42 is the bolt; 5 is the lock head. Specific embodiments

[0024] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] Among them, the same parts are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the accompanying drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this specification, "a plurality of" means two or more unless otherwise specifically defined. Figure 1

[0026] Embodiment:

[0027] As Figure 1 shown, a truck door lock that is convenient to open and close includes a door rod 1 and a lock rod head 2. The door rod 1 is arranged on the carriage, and the bottom of the door rod 1 is provided with the lock rod head 2. The lock rod head 2 is fixedly connected to the door rod 1. In the usual design, the lock rod head 2 and the door rod 1 are often integrally designed. The door rod 1 mainly determines that the carriage door is flush with the carriage body when closed without gaps. The lock head 5 at the bottom of the door rod 1 needs to cooperate with the positioning block on the carriage. The lock rod head 2 includes a hollow rod 21 and a movable rod 22. A limit ring 3 is arranged on the outer side wall of the hollow rod 21. The movable rod 22 is arranged inside the hollow rod 21. The movable rod 22 is slidably installed inside the hollow rod 21. The bottom of the movable rod 22 is provided with the lock head 5. A first groove is arranged on the left side of the lock head 5, and a second groove is arranged on the right side of the lock head 5. Both the first groove and the second groove are provided with acute-angle rounding structures. The acute-angle rounding structures can make the lock head 5 better cooperate with the fixing block at the bottom end of the carriage door, so that it does not need to be accurately aligned. As long as it can be ensured that it reaches a roughly appropriate height, it can be engaged. The lock head 5 is fixedly connected to the movable rod 22. A limit hole is arranged on the outer side wall of the hollow rod 21. Through the arrangement of the hollow rod 21 and the movable rod 22, the lock rod head 2 can have a certain additional stroke, and the lock head 5 can freely move within this additional stroke to select an appropriate distance to cooperate with the positioning block. This also enables the carriage door of the refrigerated truck, when it does not undergo severe deformation but only the deformation generated during normal use, to achieve the sealing of the carriage of the refrigerated truck without the need for repair or replacement by adjusting the position of the lock head 5. ​

[0028] As Figure 1-2 shown, a limiting mechanism 4 is provided at the top of the movable rod 22. The limiting mechanism 4 is fixedly connected to the movable rod 22. The limiting mechanism 4 can ensure that the movable rod 22 will not directly slide out from the inside of the hollow rod 21, and make the travel of the lock head 5 reasonably controllable. It can move down a little and also move up a little, which can better make the lock head 5 cooperate with the fixed block. The limiting mechanism 4 includes a sliding column 41 and a plug pin 42. The plug pin 42 is coaxially arranged with the limiting hole. The plug pin 42 is inserted into the limiting hole on the outer side wall of the hollow rod 21. This limiting hole itself is used to limit the movement of the sliding column 41. A limiting groove is provided on one side of the sliding column 41. The limiting groove is used to accommodate the plug pin 42. The width of this limiting groove is slightly wider than the diameter of the plug pin 42, which can enable the plug pin 42 to move freely therein, but at the same time will not rotate during driving, affecting the sealing performance of the refrigerated truck. The plug pin 42 is fixedly welded to the hollow rod 21. The plug pin 42 is fully welded to the hollow rod 21. This simple mechanical structure has a very long service life and hardly needs to worry about damage. Therefore, there is no need to design a detachable structure. An acute angle rounding structure is provided at the connection between the bottom of the sliding column 41 and the top of the movable rod 22. The sliding column 41 also needs to frequently contact the bottom of the hollow rod 21. The acute angle rounding structure can reduce wear and further increase the service life of the entire lock rod head 2. A shaft hole is provided inside the movable rod 22. This shaft hole is mainly for reducing weight. Both the lock head 5 and the sliding column 41 itself are welded to the movable rod 22.

[0029] In the embodiments disclosed by the present utility model, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linkage" can be a direct linkage or an indirect linkage through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments disclosed by the present utility model can be understood according to specific circumstances.

[0030] This specific embodiment is only an explanation of the present utility model, and it is not a limitation of the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

Claims

1. A truck door lock that is convenient to open and close, comprising a door rod (1) and a lock rod head (2), characterized in that: The door rod (1) is arranged on the carriage. A lock rod head (2) is arranged at the bottom of the door rod (1). The lock rod head (2) is fixedly connected to the door rod (1). The lock rod head (2) includes a hollow rod (21) and a movable rod (22). A limiting ring (3) is arranged on the outer side wall of the hollow rod (21). The movable rod (22) is arranged inside the hollow rod (21). The movable rod (22) is slidably installed inside the hollow rod (21). A limiting mechanism (4) is arranged at the top of the movable rod (22). The limiting mechanism (4) is fixedly connected to the movable rod (22). A lock head (5) is arranged at the bottom of the movable rod (22). The lock head (5) is fixedly connected to the movable rod (22).

2. The truck door lock that is convenient to open and close according to claim 1, characterized in that: A limiting hole is arranged on the outer side wall of the hollow rod (21). The limiting mechanism (4) includes a sliding column (41) and a bolt (42). The bolt (42) is coaxially arranged with the limiting hole. A limiting groove is arranged on one side of the sliding column (41). The limiting groove is used for accommodating the bolt (42). The bolt (42) is fixedly welded to the hollow rod (21).

3. The truck door lock that is convenient to open and close according to claim 2, wherein: An acute angle rounding structure is arranged at the connection between the bottom of the sliding column (41) and the top of the movable rod (22).

4. The truck door lock that is convenient to open and close according to claim 3, wherein: A shaft hole is arranged inside the movable rod (22).

5. The truck door lock that is convenient to open and close according to claim 1 is characterized in that: A first groove is arranged on the left side of the lock head (5). A second groove is arranged on the right side of the lock head (5).

6. The truck door lock that is convenient to open and close according to claim 5, wherein: Both the first groove and the second groove are provided with acute angle rounding structures.

Images