Anti-freezing and automatic reset suction mechanism for cold chain vehicle
Patent Information
- Application Number
- CN202522245122.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-23
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-10-23
AI Technical Summary
然而，在低温运输环境中，车厢门与车后门的连接处易因温差凝结水汽，进而形成冰层，导致门体卡滞，不仅增加操作人员开启和闭合门体的难度，还可能因冰层阻碍导致门体无法完全闭合，造成车厢内冷量泄漏，影响货物保鲜效果
1.本实用新型提出的一种冷链车防结冰自动复位吸合机构通过设置复位组件，利用弹簧的弹性势能驱动拉杆伸缩，带动车后门在打开后自动旋转复位，无需人工手动闭合，减少操作步骤与工作量，同时避免因忘记关门导致的车厢冷量泄漏，保障货物存储质量；
Smart Images
Figure CN224755542U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cold chain vehicle application technology, and in particular to an automatic reset and suction mechanism for preventing icing in cold chain vehicles. Background Technology
[0002] As the core equipment for transporting low-temperature goods, the sealing performance of the refrigerated truck's front and rear doors directly affects the quality of cargo storage. However, in low-temperature transport environments, moisture easily condenses at the connection between the front and rear doors due to temperature differences, forming an ice layer that can cause the doors to jam. This not only increases the difficulty for operators to open and close the doors but may also prevent the doors from closing completely due to the ice layer, resulting in cold air leakage from the truck and affecting the preservation of the goods.
[0003] Meanwhile, existing cold chain truck doors mostly rely on manual closing operations and lack automatic reset functions. During the loading and unloading process, if operators forget to close the doors in time, or delay closing them due to busy operations, the temperature inside the truck compartment will rise rapidly, damaging the storage environment of the goods. Furthermore, manual closing requires repeated adjustments to the door position to ensure a seal, increasing the complexity and workload of the operation process and making it difficult to meet the needs of efficient transportation. Therefore, this utility model proposes an automatic reset suction mechanism for preventing icing in cold chain trucks. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide an automatic reset and suction mechanism for preventing icing in cold chain vehicles, so as to realize the automatic reset and closure of the cold chain vehicle door and prevent icing, thereby ensuring the normal use of the door and the quality of goods storage.
[0005] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: providing an automatic reset and suction mechanism for preventing icing in cold chain vehicles, including a locking structure and a connecting plate that are adapted to the connection between the truck bed door and the rear door, so as to realize the locking and suction fixation between the truck bed door and the rear door of the cold chain vehicle. A removable reset assembly is installed on the rear door of the vehicle and away from the locking structure to enable automatic reset and closure of the rear door after it has been opened; The rear door automatically rotates and resets after being opened by a reset component, and a fast locking and engaging connection is achieved by using a matching locking structure and connecting plate at the connection between the passenger door and the rear door.
[0006] The present invention is further configured such that: the locking structure includes a guide frame installed inside the carriage door, a push frame is slidably connected inside the guide frame, and an mounting frame is sleeved on its outer wall near the end face, and the push frame is slidably connected to the mounting frame through a sliding shaft provided at one end, rotating blocks are symmetrically rotatably connected to the upper and lower ends of the mounting frame, and a force-bearing shaft is respectively provided through the ends of the two rotating blocks away from the mounting frame, and the force-bearing shaft is pressed against the upper and lower sides of the push frame, a stress block is sleeved on one end of the two force-bearing shafts, and the opposite ends of the two stress blocks are sleeved on the ends of the sliding shafts, and a tension spring is provided between the two force-bearing shafts.
[0007] Through the above technical solution, the guide frame provides sliding guidance for the push frame, ensuring that the push frame moves in a fixed direction; the push frame slides with the mounting frame through the sliding shaft, which can drive the stress block to move synchronously; when the stress block moves, it will push the force shaft, causing the rotating block to rotate around the mounting frame, thereby adjusting the position of the force shaft; the tension spring applies tension to the two force shafts, keeping the force shafts in a stable position when there is no external force, and providing pre-tightening force for the locking structure and the connecting plate to engage.
[0008] The present invention is further configured such that: a pusher is fixedly connected to one end of the pusher frame, and the pusher extends through the carriage door; and pressing blocks are symmetrically fixedly connected to the upper and lower sides of the pusher frame, and the two pressing blocks press against the corresponding force-bearing shafts respectively.
[0009] Through the above technical solution, the push part passes through the carriage door, making it convenient for operators to push the push frame from outside or inside the carriage to unlock the locking structure; the squeezing inclined block adopts an inclined surface design. When the push frame moves, the inclined surface of the squeezing inclined block will generate a lateral squeezing force on the force shaft, pushing the force shaft to move along the inclined surface, thereby driving the rotating block to rotate, so that the force shaft disengages from the connecting plate and completes the unlocking.
[0010] The present invention is further configured such that: the side wall of the mounting bracket is symmetrically provided with limiting slots near both ends, and the two force-bearing shafts are respectively located inside the limiting slots and are engaged with the inclined engagement point of the connecting plate.
[0011] Through the above technical solution, the limiting slot restricts the range of motion of the force-bearing shaft, prevents the force-bearing shaft from deviating from the preset trajectory when it moves, and ensures that the force-bearing shaft can accurately engage with the connecting plate; the inclined engagement point of the connecting plate is adapted to the force-bearing shaft. When the rear door is closed, the force-bearing shaft can slide into the engagement position along the inclined surface of the connecting plate, realizing the automatic engagement of the locking structure and the connecting plate, and completing the door locking.
[0012] The present invention is further configured such that: a sliding groove is provided at the middle position of the side of the mounting bracket away from the limiting slot, and the pushing bracket is slidably connected to the sliding groove via a sliding shaft.
[0013] Through the above technical solution, the slide groove provides a sliding channel for the slide shaft, limits the movement path of the slide shaft, and makes the push frame slide only along the direction of the slide groove, so as to avoid the push frame from deviating or shaking during the movement, and ensure the stability and coordination of the operation of each component of the locking structure.
[0014] The present invention is further configured such that graphite heating blocks are symmetrically fixedly connected to both sides of the mounting bracket near the middle position.
[0015] Through the above technical solution, the graphite heating block has good thermal conductivity and low temperature adaptability. In the low temperature environment of cold chain vehicles, it can heat the area around the mounting frame and locking structure by powering on, melting the ice layer that may be generated, preventing the locking structure and connecting plate from sticking together due to ice, and ensuring the normal unlocking and locking operation of the locking structure.
[0016] The present invention is further configured such that: the reset assembly includes a fixed cylinder rotatably connected to another vehicle door, a pull rod is provided inside the fixed cylinder, the pull rod passes through one end of the fixed cylinder, and the end face of the pull rod is rotatably connected to the rear door of the vehicle, a limit block is fixedly connected to one end of the pull rod located inside the fixed cylinder, and a spring is provided on its outer wall.
[0017] Through the above technical solution, the fixed cylinder is rotatably connected to the carriage door, and the pull rod is rotatably connected to the rear door, so that the pull rod can extend, retract, and rotate with the opening and closing of the door; when the rear door is opened, the pull rod is pulled out from the fixed cylinder, which drives the limit block to compress the spring, so that the spring stores elastic potential energy; when the external force disappears, the spring releases the elastic potential energy, pushes the limit block to drive the pull rod back into the fixed cylinder, and then pulls the rear door to automatically rotate and reset, so as to realize the automatic closing of the door.
[0018] The beneficial effects of this utility model are as follows: 1. The present invention proposes an automatic reset and suction mechanism for preventing icing in cold chain vehicles. By setting a reset component, the elastic potential energy of the spring drives the pull rod to extend and retract, thereby causing the rear door of the vehicle to automatically rotate and reset after opening. This eliminates the need for manual closing, reduces operation steps and workload, and at the same time avoids the leakage of cold air in the compartment due to forgetting to close the door, thus ensuring the quality of goods storage. 2. The automatic reset and suction mechanism for preventing icing in cold chain vehicles proposed in this utility model can quickly melt the ice layer at the connection between the locking structure and the connecting plate in low-temperature environments by setting a graphite heating block on the mounting frame, preventing the parts from getting stuck due to icing, ensuring smooth locking and unlocking operations, and improving the applicability and reliability of the mechanism in low-temperature cold chain scenarios. 3. The automatic reset and suction mechanism for preventing icing in cold chain vehicles proposed in this utility model achieves rapid locking and convenient unlocking of the door by adapting the locking structure and connecting plate, combined with the pre-tension of the tension spring and the unlocking action of the squeezing wedge, thereby improving operational efficiency and ensuring the sealing of the door after it is closed, thus reducing cold loss. Attached Figure Description
[0019] Figure 1 This is a first structural diagram of an automatic reset and suction mechanism for preventing icing in cold chain vehicles according to this utility model; Figure 2 This is a second structural diagram of an automatic reset and suction mechanism for preventing icing in cold chain vehicles according to this utility model; Figure 3 This is an exploded view of the truck door in the anti-icing automatic reset and suction mechanism for cold chain vehicles according to this utility model; Figure 4 This is a structural diagram of the rear door of a cold chain vehicle's anti-icing automatic reset and suction mechanism according to the present invention. Figure 5 This is a first structural diagram of the locking structure in the anti-icing automatic reset suction mechanism for cold chain vehicles of this utility model; Figure 6 This is a structural diagram of the mounting bracket in the anti-icing automatic reset and suction mechanism for cold chain vehicles according to this utility model; Figure 7 This is a second structural diagram of the locking structure in the automatic reset and suction mechanism for preventing icing in a cold chain vehicle according to this utility model; Figure 8 This is the third structural diagram of the locking structure in the anti-icing automatic reset suction mechanism for cold chain vehicles of this utility model; Figure 9 This is a cross-sectional view of the reset component in the automatic reset and suction mechanism for preventing icing in a cold chain vehicle according to this utility model.
[0020] In the diagram: 1. Carriage door; 2. Rear door; 3. Locking structure; 31. Guide frame; 32. Push frame; 321. Hand push part; 322. Extrusion inclined block; 323. Sliding shaft; 33. Mounting frame; 331. Limiting slot; 332. Sliding groove; 333. Graphite heating block; 34. Rotating block; 35. Force-bearing shaft; 36. Stress block; 37. Tension spring; 4. Reset assembly; 41. Fixed cylinder; 42. Pull rod; 43. Limiting block; 44. Spring; 5. Connecting plate. Detailed Implementation
[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.
[0022] like Figures 1-8 As shown, an automatic reset and suction mechanism for preventing icing in a cold chain vehicle includes a locking structure 3 and a connecting plate 5 that are adapted to the connection between the cargo door 1 and the rear door 2, so as to realize the locking and suction fixation between the cargo door 1 and the rear door 2 of the cold chain vehicle. The locking structure 3 includes a guide frame 31 installed inside the carriage door 1. A push frame 32 is slidably connected inside the guide frame 31. The guide frame 31 provides sliding guidance for the push frame 32, ensuring that the push frame 32 moves in a fixed direction. A push part 321 is fixedly connected to one end of the push frame 32, and the push part 321 passes through the carriage door 1. Squeezing blocks 322 are symmetrically fixedly connected to the upper and lower sides of the push frame 32, and the two squeezing blocks 322 squeeze the corresponding force shaft 35 respectively. The push part 321 passes through the carriage door 1, making it convenient for the operator to push the push frame 32 from outside or inside the carriage to unlock the locking structure 3. The squeezing blocks 322 adopt a sloping design. When the push frame 32 moves, the sloping surface of the squeezing blocks 322 will generate a lateral squeezing force on the force shaft 35, pushing the force shaft 35 to move along the sloping direction, thereby driving the rotating block 34 to rotate, so that the force shaft 35 disengages from the connecting plate 5, completing the unlocking. A mounting bracket 33 is fitted onto the outer wall near the end face, and a pusher 32 is slidably connected to the mounting bracket 33 via a sliding shaft 323 at one end. The pusher 32 slides into the mounting bracket 33 via the sliding shaft 323, which can drive the stress block 36 to move synchronously. The side wall of the mounting bracket 33 is symmetrically provided with limiting slots 331 near both ends, and two force shafts 35 are respectively located inside the limiting slots 331 and are engaged with the inclined engagement point of the connecting plate 5. The limiting slots 331 restrict the range of motion of the force shafts 35, preventing the force shafts 35 from deviating from the preset trajectory when moving, and ensuring that the force shafts 35 can be accurately engaged with the connecting plate 5. The inclined engagement point of the connecting plate 5 is adapted to the force shafts 35. When the rear door 2 is closed, the force shafts 35 can slide into the engagement position along the inclined surface of the connecting plate 5, realizing the automatic engagement of the locking structure 3 and the connecting plate 5, and completing the door locking. A sliding groove 332 is provided in the middle of the side of the mounting bracket 33 away from the limiting slot 331, and the push bracket 32 is slidably connected to the sliding groove 332 through the sliding shaft 323. The sliding groove 332 provides a sliding channel for the sliding shaft 323, limits the movement path of the sliding shaft 323, and makes the push bracket 32 slide only along the direction of the sliding groove 332, so as to avoid the push bracket 32 from deviating or shaking during the movement, and ensure the stability and coordination of the action of each component of the locking structure 3. Graphite heating blocks 333 are symmetrically fixed to both sides of the mounting bracket 33 near the middle. The graphite heating blocks 333 have good thermal conductivity and low temperature adaptability. In the low temperature environment of the cold chain vehicle, the mounting bracket 33 and the surrounding area of the locking structure 3 can be heated by electricity to melt the ice layer that may be generated, prevent the locking structure 3 and the connecting plate 5 from sticking due to ice, and ensure the normal unlocking and locking operation of the locking structure 3.
[0023] Rotating blocks 34 are symmetrically rotatably connected to the upper and lower ends of the mounting bracket 33. Force-bearing shafts 35 are respectively installed through the ends of the two rotating blocks 34 away from the mounting bracket 33, and the force-bearing shafts 35 are pressed against the upper and lower sides of the push frame 32. Stress blocks 36 are respectively sleeved on one end of the two force-bearing shafts 35. When the stress blocks 36 move, they will push the force-bearing shafts 35, causing the rotating blocks 34 to rotate around the mounting bracket 33, thereby adjusting the position of the force-bearing shafts 35. The opposite ends of the two stress blocks 36 are sleeved on the ends of the sliding shafts 323. A tension spring 37 is provided between the two force-bearing shafts 35, and the tension spring 37 applies tension to the two force-bearing shafts 35. When no external force is applied, the force-bearing shafts 35 maintain a stable position, providing pre-tightening force for the locking structure 3 and the connecting plate 5 to engage.
[0024] like Figure 9 As shown, a reset assembly 4 is detachably installed on the rear door 2 and away from the locking structure 3 to achieve automatic reset and closure of the rear door 2 after it is opened. The reset assembly 4 includes a fixed cylinder 41 rotatably connected to another vehicle door 1. A pull rod 42 is provided inside the fixed cylinder 41, and the pull rod 42 passes through one end of the fixed cylinder 41. The end face of the pull rod 42 is rotatably connected to the rear door 2. One end of the pull rod 42 located inside the fixed cylinder 41 is fixedly connected to a limit block 43, and its outer wall is wrapped with a spring 44. The fixed cylinder 41 is rotatably connected to the carriage door 1, and the pull rod 42 is rotatably connected to the rear door 2, so that the pull rod 42 can extend, retract, and rotate with the opening and closing of the rear door 2; when the rear door 2 is opened, the pull rod 42 is pulled out from the fixed cylinder 41, which drives the limit block 43 to compress the spring 44, so that the spring 44 stores elastic potential energy; when the external force disappears, the spring 44 releases the elastic potential energy, pushes the limit block 43 to drive the pull rod 42 to retract into the fixed cylinder 41, and then pulls the rear door 2 to automatically rotate and reset, so as to realize the automatic closing of the door. The reset component 4 enables the rear door 2 to automatically rotate and reset after opening, and the locking structure 3 and connecting plate 5 that are compatible with the connection between the car door 1 and the rear door 2 achieve a fast locking and suction connection.
[0025] When this utility model is in use, when it is necessary to open the rear door 2, the operator pushes the pusher 321, which drives the pusher 32 to slide along the guide frame 31 and the slide groove 332; the pressing inclined block 322 on the pusher 32 presses the force shaft 35, causing the force shaft 35 to move along the limiting slot 331, and the rotating block 34 rotates accordingly, and the force shaft 35 disengages from the connecting plate 5, completing the unlocking; at this time, the rear door 2 can be opened outward, and the rear door 2 drives the pull rod 42 to be pulled out from the fixed cylinder 41, and the limiting block 43 compresses the spring 44 to store elastic potential energy.
[0026] When the rear door 2 is closed, the push handle 321 is released, and the tension spring 37 pulls the force shaft 35 to reset. At the same time, the spring 44 releases its elastic potential energy, pulls the pull rod 42 to retract the fixed cylinder 41, and drives the rear door 2 to rotate and reset automatically. During the closing process of the rear door 2, the inclined surface of the connecting plate 5 pushes the force shaft 35 to move. After the rear door 2 is completely closed, the force shaft 35 is engaged in the locking position of the connecting plate 5 under the action of the tension spring 37, thus completing the locking.
[0027] In low-temperature environments, the graphite heating block 333 is powered on and heats up, melting the ice layer at the connection between the locking structure 3 and the connecting plate 5, ensuring that the locking and unlocking operations are carried out normally.
[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. An automatic reset and engaging mechanism for preventing icing in cold chain vehicles, characterized in that: include A locking structure (3) and a connecting plate (5) are installed at the connection between the compartment door (1) and the rear door (2) of the cold chain vehicle to achieve locking and fixing between the compartment door (1) and the rear door (2); A removable reset assembly (4) is installed on the rear door (2) away from the locking structure (3) to achieve automatic reset and closure of the rear door (2) after it is opened; The rear door (2) is automatically rotated and reset after being opened by the reset component (4). The locking structure (3) and connecting plate (5) that are compatible with the connection between the car door (1) and the rear door (2) are used to achieve a fast locking and suction connection.
2. The automatic reset and engaging mechanism for preventing icing in cold chain vehicles according to claim 1, characterized in that: The locking structure (3) includes a guide frame (31) installed inside the carriage door (1). A push frame (32) is slidably connected inside the guide frame (31). A mounting frame (33) is sleeved on its outer wall near the end face. The push frame (32) is slidably connected to the mounting frame (33) through a sliding shaft (323) at one end. Rotating blocks (34) are symmetrically rotatably connected to the upper and lower ends of the mounting frame (33). A force-bearing shaft (35) is respectively provided through the end of the two rotating blocks (34) away from the mounting frame (33). The force-bearing shaft (35) is pressed against the upper and lower sides of the push frame (32). A stress block (36) is sleeved on one end of the two force-bearing shafts (35). The opposite ends of the two stress blocks (36) are sleeved on the end of the sliding shaft (323). A tension spring (37) is provided between the two force-bearing shafts (35).
3. The automatic reset and engaging mechanism for preventing icing in cold chain vehicles according to claim 2, characterized in that: One end of the push frame (32) is fixedly connected to a push part (321), and the push part (321) passes through the carriage door (1). The upper and lower sides of the push frame (32) are symmetrically fixedly connected to pressing blocks (322), and the two pressing blocks (322) are pressed against the corresponding force shaft (35).
4. The automatic reset and engaging mechanism for preventing icing in cold chain vehicles according to claim 2, characterized in that: The mounting bracket (33) has symmetrically provided limiting slots (331) on its side wall near both ends, and the two force shafts (35) are respectively located inside the limiting slots (331) and are engaged with the inclined engagement point of the connecting plate (5).
5. The automatic reset and engaging mechanism for preventing icing in cold chain vehicles according to claim 4, characterized in that: The mounting bracket (33) has a sliding groove (332) at the middle of the side away from the limiting slot (331), and the push bracket (32) is slidably connected to the sliding groove (332) through the sliding shaft (323).
6. The automatic reset and engaging mechanism for preventing icing in cold chain vehicles according to claim 4, characterized in that: Graphite heating blocks (333) are symmetrically fixedly connected to both sides of the mounting bracket (33) near the middle position.
7. The automatic reset and engaging mechanism for preventing icing in cold chain vehicles according to claim 1, characterized in that: The reset assembly (4) includes a fixed cylinder (41) rotatably connected to another carriage door (1). A pull rod (42) is provided inside the fixed cylinder (41), and the pull rod (42) passes through one end of the fixed cylinder (41). The end face of the pull rod (42) is rotatably connected to the rear door (2). One end of the pull rod (42) located inside the fixed cylinder (41) is fixedly connected to a limit block (43), and its outer wall is wrapped with a spring (44).