Dining car towing and connecting device with damping and buffering functions

Abstract

The utility model relates to the technical field of pull connecting devices, and discloses a dining car pull connecting device with damping and buffering functions, which comprises a fixed seat and an extrusion component. An extrusion assembly is arranged in the center of one side of the fixed seat; a connecting cylinder is arranged at one end, away from the fixed seat, of the extrusion assembly; the extrusion assembly comprises a mounting cylinder, the mounting cylinder is fixed to one side of the fixing base, a piston is arranged in the mounting cylinder, an extrusion rod is fixedly connected to one side of the piston, the end, located on the outer side of the mounting cylinder, of the extrusion rod is fixedly sleeved with a sleeve block, the end, away from the piston, of the extrusion rod is movably inserted into the connecting cylinder, and the sleeve block is located between the mounting cylinder and the connecting cylinder. The piston is pushed by the extrusion rod to move in the mounting cylinder, and the piston is subjected to resistance of air in the mounting cylinder in the moving process, so that a part of impact energy is consumed, the impact of the dining car trailer on the trailer connecting device under the conditions of sudden brake and the like can be effectively reduced, the damage degree of each component is reduced, and the service life of the device is remarkably prolonged; the use cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of trailer connection devices, specifically a catering car trailer connection device with shock absorption and buffer. Background Technology

[0002] As an innovative mode of transportation, the catering truck trailer cleverly combines the functional characteristics of a catering truck and a trailer, playing a vital role in the mobile catering service sector. It is typically powered by a tractor unit, towing a catering truck trailer. Its flexibility and convenience allow it to adapt to various catering service needs, making it a common sight in places where people gather, such as outdoor activities, festivals, and tourist attractions. During the operation of the catering truck trailer, the connection between the tractor unit and the catering truck trailer is crucial, and the trailer coupling device is the key component for achieving this connection. However, existing trailer coupling devices have certain design flaws. Currently, most trailer coupling devices use a rigid connection method, directly fixing the tractor unit and the trailer trailer together. While this connection method is simple in structure and provides a stable connection, it has revealed many problems in practical use.

[0003] When the tractor unit encounters an unexpected situation requiring sudden braking, the dining car compartment will continue its forward motion due to its own inertia. At this time, the compartment will exert a strong impact force on the trailer coupling, causing it to vibrate violently. On one hand, this strong vibration will cause varying degrees of damage to the various components of the trailer coupling, accelerating wear and aging, thus shortening its lifespan and increasing operating costs. On the other hand, the impact force will also be transmitted to the tractor unit through the trailer coupling, adversely affecting its driving stability and safety, and potentially even causing a traffic accident. Utility Model Content

[0004] The purpose of this invention is to provide a food cart towing connection device with shock absorption and buffer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a food cart towing and connecting device with shock absorption and buffer, comprising a fixed base, a buffer assembly and a compression assembly; the compression assembly is provided at the center of one side of the fixed base, a connecting cylinder is provided at the end of the compression assembly away from the fixed base, and a plurality of buffer assemblies are evenly provided on the outer side of the compression assembly;

[0006] The extrusion assembly includes an installation cylinder, which is fixed to one side of a fixed base. A piston is provided inside the installation cylinder, and an extrusion rod is fixedly connected to one side of the piston. A sleeve block is fixedly sleeved at one end of the extrusion rod located outside the installation cylinder, and the other end of the extrusion rod away from the piston is movably inserted into a connecting cylinder. The sleeve block is located between the installation cylinder and the connecting cylinder.

[0007] Each of the buffer components includes two mounting blocks, both of which are fixed to the outside of the fixed base. Two fixed rods are fixed in parallel between the two mounting blocks. A movable block is fixedly sleeved on the outside of the two fixed rods. Two springs are fixedly connected between the movable block and the two mounting blocks. Four springs are respectively sleeved around the two fixed rods. The movable block and the sleeve block are connected by a connecting plate.

[0008] Preferably, one end of the connecting plate is rotatably connected to the moving block via a rotating shaft, and the other end of the connecting plate is rotatably connected to the outer side of the sleeve block.

[0009] Preferably, a buffer pad is fixedly connected to the side of the sleeve block near the connecting cylinder.

[0010] Preferably, the inner wall of the connecting cylinder is provided with a plurality of side grooves, and a plurality of side blocks matching the side grooves are fixedly connected to the outer side of one end of the extrusion rod located inside the connecting cylinder, and the plurality of side blocks are slidably connected to the plurality of side grooves respectively.

[0011] Preferably, the diameter of the mounting cylinder opening matches the diameter of the extrusion rod, and the diameter of the mounting cylinder opening is smaller than the piston diameter.

[0012] Compared with existing technologies, the piston is pushed to move inside the mounting cylinder by the extrusion rod. During the movement, the piston is resisted by the air inside the mounting cylinder, which consumes some of the impact energy and plays a preliminary buffering role. When the spring is subjected to the force transmitted from the sleeve block, it will undergo elastic deformation, converting the impact energy into the elastic potential energy of the spring. When the impact force disappears, the spring will return to its original shape, releasing the elastic potential energy, further absorbing and dispersing the impact energy. The extrusion component and the buffer component work together to effectively reduce the impact of the catering truck trailer on the trailer connection device under emergency braking and other situations, reduce the degree of damage to each component, thereby significantly extending the service life of the device and reducing the operating cost. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the buffer component structure of this utility model;

[0015] Figure 3 This is a schematic cross-sectional view of the extrusion assembly of this utility model.

[0016] In the diagram: 1. Fixed base; 2. Buffer assembly; 21. Mounting block; 22. Connecting plate; 23. Moving block; 24. Spring; 25. Fixed rod; 3. Extrusion assembly; 31. Mounting cylinder; 32. Piston; 33. Extrusion rod; 34. Sleeve block; 4. Buffer pad; 5. Side block; 6. Side groove; 7. Connecting cylinder. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-3 The present invention provides the following technical solution:

[0019] Example 1: A shock-absorbing and buffered catering truck trailer connection device includes a fixed base 1 and an extrusion assembly 3. The extrusion assembly 3 is located at the center of one side of the fixed base 1, and a connecting cylinder 7 is located at the end of the extrusion assembly 3 away from the fixed base 1. The extrusion assembly 3 includes an installation cylinder 31, which is fixed to one side of the fixed base 1. A piston 32 is located inside the installation cylinder 31, and an extrusion rod 33 is fixedly connected to one side of the piston 32. A sleeve block 34 is fixedly sleeved at the end of the extrusion rod 33 located outside the installation cylinder 31. The end of the extrusion rod 33 away from the piston 32 is movably inserted into the connecting cylinder 7. The sleeve block 34 is located between the installation cylinder 31 and the connecting cylinder 7. The piston 32 is pushed to move within the installation cylinder 31 by the extrusion rod 33. During the movement, the piston 32 will be subject to the resistance of the air inside the installation cylinder 31, thereby consuming some of the impact energy. This can effectively reduce the impact of the catering truck trailer on the trailer connection device under conditions such as sudden braking, reduce the damage to various components, and thus significantly extend the service life of the device and reduce the cost of use.

[0020] A buffer pad 4 is fixedly connected to the side of the sleeve 34 near the connecting cylinder 7. The buffer pad 4 plays a secondary buffering role when the sleeve 34 contacts the connecting cylinder 7, reducing the hard collision between the sleeve 34 and the connecting cylinder 7 and reducing the risk of component damage.

[0021] The inner wall of the connecting cylinder 7 is provided with several side grooves 6. The outer side of one end of the extrusion rod 33 located inside the connecting cylinder 7 is fixedly connected with several side blocks 5 that match the side grooves 6. The side blocks 5 are slidably connected to the side grooves 6 respectively. Through the cooperation of the side blocks 5 and the side grooves 6, the connecting cylinder 7 will pull the extrusion rod 33, thereby pulling the carriage through the mounting cylinder 31 and the fixed seat 1.

[0022] The diameter of the mounting cylinder 31 is matched with the diameter of the extrusion rod 33. The diameter of the mounting cylinder 31 is smaller than the diameter of the piston 32 to prevent the piston 32 from detaching from the inside of the mounting cylinder 31.

[0023] In use, the fixing seat 1 is installed at the front end of the dining car with bolts, and one end of the connecting cylinder 7 is installed with the tractor through the connector. When the tractor is driving normally, the dining car towing connection device with shock absorption and buffer is in a stable working state, and the piston 32 is stationary in the mounting cylinder 31. When the tractor brakes suddenly, the dining car will continue to move forward due to inertia, generating a strong impact force on the towing connection device. At this time, the extrusion component 3 plays the main buffering role, and the extrusion rod 33 will quickly push the piston 32 forward in the mounting cylinder 31. During the movement, the piston 32 will be subject to the air resistance in the mounting cylinder 31, which consumes a lot of impact energy, thereby reducing the impact on the towing connection device, reducing the damage to various components, and thus significantly extending the service life of the device and reducing the cost of use.

[0024] In Example 2, based on the technical solution of Example 1, this example further includes several buffer components 2, which are evenly distributed around the mounting cylinder 31. Each buffer component 2 includes two mounting blocks 21, which are fixed to the outside of the fixed base 1. Two fixed rods 25 are fixed parallel to each other between the two mounting blocks 21. A movable block 23 is fixedly sleeved on the outside of the two fixed rods 25. Two springs 24 are fixedly connected between the movable block 23 and the two mounting blocks 21. The four springs 24 are respectively sleeved around the two fixed rods 25. The movable block 23 and the sleeve block 34 are connected by a connecting plate 22. One end of the connecting plate 22 is rotatably connected to the movable block 23 through a rotating shaft, and the other end of the connecting plate 22 is rotatably connected to the outside of the sleeve block 34. When the springs 24 in the buffer component 2 are subjected to the force transmitted from the sleeve block 34, they will undergo elastic deformation, converting the impact energy into the elastic potential energy of the springs 24. When the impact force disappears, the springs 24 will return to their original shape, releasing the elastic potential energy, further absorbing and dispersing the impact energy, and ensuring the performance and service life of the towing connection device.

[0025] 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 food cart trailer connection device with shock absorption and buffer, characterized in that, It includes a fixed base (1), a buffer assembly (2), and a compression assembly (3); The center of one side of the fixed base (1) is provided with a compression component (3), and the end of the compression component (3) away from the fixed base (1) is provided with a connecting cylinder (7). Several buffer components (2) are evenly provided on the outer side of the compression component (3). The extrusion assembly (3) includes an installation cylinder (31), which is fixed to one side of the fixed base (1). A piston (32) is provided inside the installation cylinder (31), and an extrusion rod (33) is fixedly connected to one side of the piston (32). A sleeve block (34) is fixedly sleeved at one end of the extrusion rod (33) located outside the installation cylinder (31). The end of the extrusion rod (33) away from the piston (32) is movably inserted into the connecting cylinder (7). The sleeve block (34) is located between the installation cylinder (31) and the connecting cylinder (7). Each of the buffer components (2) includes two mounting blocks (21), both of which are fixed to the outside of the fixed base (1). Two fixed rods (25) are fixed in parallel between the two mounting blocks (21). A movable block (23) is fixedly sleeved on the outside of the two fixed rods (25). Two springs (24) are fixedly connected between the movable block (23) and the two mounting blocks (21). The four springs (24) are respectively sleeved on the outside of the two fixed rods (25). The movable block (23) and the sleeve block (34) are connected by a connecting plate (22).

2. The food cart trailer connection device with shock absorption and buffer as described in claim 1, characterized in that: One end of the connecting plate (22) is rotatably connected to the moving block (23) via a rotating shaft, and the other end of the connecting plate (22) is rotatably connected to the outside of the sleeve block (34).

3. The food cart trailer connection device with shock absorption and buffer as described in claim 1, characterized in that: A buffer pad (4) is fixedly connected to the side of the sleeve (34) near the connecting cylinder (7).

4. The food cart trailer connection device with shock absorption and buffer as described in claim 1, characterized in that: The inner wall of the connecting cylinder (7) is provided with several side grooves (6). The outer side of one end of the extrusion rod (33) located inside the connecting cylinder (7) is fixedly connected with several side blocks (5) that match the side grooves (6). The several side blocks (5) are slidably connected to the several side grooves (6) respectively.

5. A food cart trailer connection device with shock absorption and buffer as described in claim 1, characterized in that: The diameter of the mounting cylinder (31) is matched with the diameter of the extrusion rod (33), and the diameter of the mounting cylinder (31) is smaller than the diameter of the piston (32).

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