CN219910575U - Novel rolling shutter type rear door for refrigerator car - Google Patents

Abstract

The utility model discloses a novel rolling shutter type rear door for a refrigerator car, which relates to the field of cold chain logistics equipment.

Description

Novel rolling shutter type rear door for refrigerator car

Technical Field

The utility model relates to the field of cold chain logistics equipment, in particular to a novel rolling shutter type rear door for a refrigerator car.

Background

In general, the back doors of van-type refrigerated vehicles, thermal-insulation vehicles, vaccine cold chain vehicles and the like are split, and because most van-type trucks are very high, when the back doors are opened and closed by manpower, time and labor are wasted, and enough working space is needed for implementation.

The rolling shutter door (rolling gate) is formed by connecting door sheets with multiple joints in series and sliding in a fixed slideway, the existing heat-preservation rolling shutter door is sealed by mounting tooth-shaped sealing strips at the left and right sides in the rear door frame and the tooth-shaped sealing strips at the upper part of the rolling shutter door and the compression type sealing at the lower part of the rolling shutter door, and the tooth-shaped sealing strips at the left and right sides in the rear door frame still contact the rolling shutter door in the ascending and descending processes of the rolling shutter door, so that the rolling shutter door slides smoothly, the sealing strips are easy to damage, the sealing effect is poor, and the application of the tooth-shaped sealing strips at the upper part of the rolling shutter door to the height in a carriage is reduced; the front surface of the existing heat-preservation rolling door is provided with the door lock obviously, the dragging steel wire rope is also used for loading the front surface of the heat-preservation rolling door, so that the rolling door is completely opened for avoiding the projection, the rolling door is required to move integrally backwards, the length in a compartment is reduced, and meanwhile, the sealing is poorer due to the dragging of the steel wire rope; in addition, most heat-preservation rolling doors cannot be locked in emergency due to operation accidents caused by failure of locking of a dragging mechanism in the ascending and descending process no matter in electric or manual operation.

Based on the above, a novel rolling shutter type rear door for a refrigerator car is provided, and the defects of the conventional device can be overcome.

Disclosure of Invention

The utility model aims to provide a novel rolling shutter type rear door for a refrigerator car, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a novel rolling slats form back door for refrigerator car, includes the guide rail that door frame and symmetry set up behind the aluminum alloy ex-trusions, door frame and refrigerator car goods railway carriage or compartment open end fixed connection behind the aluminum alloy ex-trusions, be equipped with on the door frame behind the aluminum alloy ex-trusions and be used for reducing the air conditioning and flow out fill gassing type airtight adhesive tape, the guide rail is fixed to be established in the carriage and is close to the inside both sides of open end, the sliding of guide rail is equipped with the heat preservation rolling slats door body that is used for carrying out the heat preservation to the carriage inside, be equipped with on the heat preservation rolling slats door body and be used for carrying out fixed embedded pretension lock to the heat preservation rolling slats door body, the inboard upper end of door frame is fixed with guide rail position department behind the aluminum alloy ex-trusions is equipped with electric hoister, electric hoister output tube is fixed to be equipped with the steel wire, be equipped with the safety locking mechanism that is used for preventing that heat preservation rolling slats door body from descending rapidly behind the aluminum alloy ex-trusions.

Based on the technical scheme, the utility model also provides the following optional technical schemes:

in one alternative: the aluminum alloy profile rear door frame consists of an upper door frame, a side door frame and a lower door frame, wherein the upper door frame, the side door frame and the lower door frame are all made of aluminum alloy materials, and the upper door frame, the side door frame and the lower door frame adopt a hard PVC heat-insulating bridge structure.

In one alternative: the heat-preservation rolling shutter door body comprises a soft sealing block, a lower door plate block is fixedly arranged at the upper end of the soft sealing block, a plurality of middle door plate blocks are arranged at the upper end of the lower door plate block, an upper door plate block is arranged at the upper end of the middle door plate block, and the lower door plate block and the middle door plate block are connected through hinges.

In one alternative: the lower door plate block, the middle door plate block and the two ends of the joint of the upper door plate block are respectively provided with a roller hinge, and the two sides of the lower end of the lower door plate block and the two sides of the upper end of the upper door plate block are respectively provided with a roller.

In one alternative: and the two sides of the lower end of the lower door plate block are provided with dragging points which are fixedly connected with one end of the steel wire.

In one alternative: the guide rail is near the fixed small stroke push rod that is equipped with in last door plant piece end, guide rail and small stroke push rod make up into rail set.

In one alternative: the embedded pre-tightening door lock comprises a basin-shaped part, the basin-shaped part is fixedly arranged in a mounting groove on one side of a lower door plate, a lock body is arranged on the basin-shaped part in a matched mode, a lock rod is arranged on the lock body in a matched mode, the two lock rods are slidably arranged in a sliding groove in the lower door plate, and a lock nest is arranged at the position, corresponding to the position of the lock rod, of the inner side of a door frame behind the aluminum alloy section.

In one alternative: the air-tight adhesive tape of gassing formula is filled including the adhesive tape main part, two the adhesive tape main part cartridge is inboard at the door frame behind the aluminum alloy ex-trusions, adhesive tape main part input and pipeline one end intercommunication, the pipeline other end communicates with the integrative pump output of gassing, the integrative pump of gassing is filled and is fixedly established in the packing box outside.

In one alternative: one side is provided with a first contact switch in the lock nest, and the first contact switch is electrically connected with the inflation and deflation integrated pump.

In one alternative: the safety locking mechanism comprises a second contact switch, two second contact switch output ends are electrically connected with an electric limiting input end, the electric limiting input end is fixedly arranged at the lower end of the guide rail, the second contact switch output end is electrically connected with the input end of the electric hoisting machine, and an emergency locking device for preventing the heat-preservation rolling shutter door body from rapidly descending is matched with the protruding blocks at the two ends of the lower door plate block.

In one alternative: the emergency locking device comprises a sliding block, the sliding block is arc-shaped, the sliding block is arranged in the installation box in a sliding mode, an emergency locking device is arranged at one end of the sliding block in a matched mode, and the installation box is fixedly arranged on the inner side of the cargo compartment.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the embedded pre-tightening door lock is arranged in the surface mounting groove of the lower door plate block, so that no protrusion exists on the heat-preservation rolling door body, and the waste of the length in the cargo compartment caused by the protrusion of the heat-preservation rolling door body is avoided.

2. According to the utility model, the sealing performance of the cargo box is improved through the air-filling and discharging type airtight rubber strip, and meanwhile, the sealing piece is not easy to damage.

3. The utility model can effectively avoid operation accidents caused by the failure of the locking of the electric hoisting machine in the rising, rising and falling processes of the heat-preservation rolling door body through the safety locking mechanism, and increases the use safety of the heat-preservation rolling door body.

Drawings

FIG. 1 is a schematic cross-sectional view of an upper door frame and a lower door frame of the present utility model.

Fig. 2 is a schematic cross-sectional view of a side door frame of the present utility model.

Fig. 3 is a schematic diagram of the installation of the embedded pre-tightening door lock of the present utility model.

FIG. 4 is a schematic cross-sectional view of the utility model A-A.

FIG. 5 is a schematic view of a section B-B of the present utility model.

FIG. 6 is a schematic view of the connection of the lower door plate, the middle door plate and the upper door plate according to the present utility model.

FIG. 7 is a schematic view of a bump and tow point mounting of the present utility model.

FIG. 8 is a schematic view of a roller hinge, roller assembly according to the present utility model.

FIG. 9 is a schematic diagram of the pump assembly of the present utility model.

FIG. 10 is a schematic view of the installation of the adhesive tape body of the present utility model.

FIG. 11 is a schematic view showing the rising state of the thermal insulation rolling shutter door body according to the present utility model.

Fig. 12 is a schematic view showing a descending state of the thermal insulation rolling shutter door body according to the present utility model.

FIG. 13 is a schematic view of a small stroke pushrod of the present utility model installed.

Fig. 14 is a schematic diagram showing the connection between the thermal insulation rolling door body and the guide rail.

Fig. 15 is a schematic view of the emergency locking device of the present utility model.

Fig. 16 is a schematic view of the connection of the thermal insulation rolling door body and the end of the guide rail.

Fig. 17 is a schematic view of a second contact switch and an electrical limit mount of the present utility model.

Fig. 18 is a schematic view of the structure of the safety locking mechanism of the present utility model.

FIG. 19 is a schematic view of the slider and emergency lock connection of the present utility model.

Reference numerals annotate: the door comprises a rear door frame of an aluminum alloy profile, an upper door frame of the profile, a side door frame of the profile, a lower door frame of the profile, an air-tight rubber strip of the profile, a pipeline of the profile, a pump of the profile, a first contact switch of the profile, a thermal insulation roller shutter door body of the profile, a soft sealing block of the profile, a lower door plate block of the profile, a convex block of the profile, a dragging point of the profile, a middle door plate block of the profile, a 34 upper door plate block of the profile, a roller hinge of the profile, a 36 hinge, a 37 roller, a 4 embedded pre-tightening door lock, a basin-shaped part of the profile, a 42 lock body, a 43 lock rod, a 44 lock pit, an electric hoist of the profile, a steel wire 51, a 6 track device, a 61 guide rail, a 62 small stroke push rod, a 7 safety locking mechanism, a 71 second contact switch of the profile, a 72 electric limit, a 73 emergency locking device, a 731 slider, a 732 installation box, and a 733 emergency locking device.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

In one embodiment, as shown in fig. 1-19, a novel rolling shutter type rear door for a refrigerated vehicle comprises an aluminum alloy section rear door frame 1 and symmetrically arranged guide rails 61, wherein the aluminum alloy section rear door frame 1 is fixedly connected with the opening end of a cargo compartment of the refrigerated vehicle, the aluminum alloy section rear door frame 1 is provided with an air-filling and air-discharging airtight adhesive tape 2 for reducing the outflow of cold air, the guide rails 61 are fixedly arranged on two sides of the interior of a compartment close to the opening end, the guide rails 61 are slidably provided with heat-preserving rolling shutter door bodies 3 for preserving heat in the compartment, the heat-preserving rolling shutter door bodies 3 are provided with embedded pre-tightening door locks 4 for fixing the heat-preserving rolling shutter door bodies 3, the electric hoist 5 is fixedly arranged at the position corresponding to the guide rail 61 at the upper end of the inner side of the rear door frame 1 of the aluminum alloy section bar, the steel wire 51 is fixedly arranged at the output pipe of the electric hoist 5, the safety locking mechanism 7 for preventing the thermal insulation rolling door body 3 from rapidly descending is arranged on the rear door frame 1 of the aluminum alloy section bar, the sealing performance of a cargo compartment is improved through the air inflation type airtight adhesive tape 2, meanwhile, the sealing piece is not easy to damage, the embedded pre-tightening door lock 4 is arranged on the thermal insulation rolling door body 3, no protrusion exists on the thermal insulation rolling door body 3, the waste of the length in the cargo compartment caused by the protrusion of the thermal insulation rolling door body 3 is avoided, and the operation accident caused by the locking failure of the electric hoist 5 in the processes of lifting, ascending and descending of the thermal insulation rolling door body 3 can be effectively avoided by the safety locking mechanism 7;

the aluminum alloy profile rear door frame 1 is composed of an upper door frame 11, a side door frame 12 and a lower door frame 13, wherein the upper door frame 11, the side door frame 12 and the lower door frame 13 are made of aluminum alloy materials, the upper door frame 11, the side door frame 12 and the lower door frame 13 adopt hard PVC heat-insulating bridge structures, and when the aluminum alloy profile rear door frame is used, the upper door frame 11, the side door frame 12 and the lower door frame 13 adopt hard PVC heat-insulating bridge structures, so that the aluminum alloy profile rear door frame is high in strength, light in weight, attractive and capable of blocking internal and external heat bridges of a carriage.

The heat preservation rolling shutter door body 3 includes soft sealing block 31, soft sealing block 31 upper end is fixed to be equipped with down door plant piece 32, lower door plant piece 32 upper end is equipped with a plurality of well door plant piece 33, well door plant piece 33 upper end is equipped with door plant piece 34, all be connected through hinge 36 between lower door plant piece 32 and the well door plant piece 33, between well door plant piece 33 and the upper door plant piece 34, during the use, be convenient for heat preservation rolling shutter door body 3 bending when using, not fragile.

The lower door plate 32, the middle door plate 33 and the upper door plate 34 are respectively provided with a roller hinge 35 at two ends, and the lower end of the lower door plate 32 and two sides of the upper end of the upper door plate 34 are respectively provided with a roller 37, and when the thermal insulation rolling shutter door body 3 is used, the rollers on one side of the rollers 35 and the rollers 37 roll on the guide rails 61, so that the thermal insulation rolling shutter door body 3 can be conveniently opened and closed.

The lower door plant piece 32 lower extreme both sides are equipped with drags the point 322, drag point 322 and steel wire 51 one end fixed connection, during the use, start electric hoister 5, electric hoister 5 output carries out the rolling to steel wire 51, and when the steel wire 51 was rolled, steel wire 51 one end was passed through drags point 322 pulling gyro wheel hinge 35 and gyro wheel 37 one end gyro wheel and is rolled on guide rail 61 to drive 3 and remove.

The guide rail 61 is close to the tail end of the upper door plate block 34 and is fixedly provided with a small stroke push rod 62, the guide rail 61 and the small stroke push rod 62 are combined into a track device 6, when the thermal insulation rolling door body 3 is required to be closed after moving to the tail end of the guide rail 61 in use, the small stroke push rod 62 is started, the output end of the small stroke push rod 62 enables the roller hinge 35 and one end roller of the roller 37 to roll on the guide rail 61 by pushing the upper door plate block 34, meanwhile, the electric hoist 5 is started, the output end of the electric hoist 5 loosens the steel wire 51, and the thermal insulation rolling door body 3 descends at a uniform speed under the dead weight of the thermal insulation rolling door body 3 and the dragging of the steel wire 51.

The embedded pre-tightening door lock 4 comprises a basin-shaped part 41, the basin-shaped part 41 is fixedly arranged in a mounting groove on one side of the lower door plate 32, a lock body 42 is matched with the basin-shaped part 41, a lock rod 43 is matched with the lock body 42, the two lock rods 43 are slidably arranged in a sliding groove in the lower door plate 32, a lock nest 44 is arranged at the position corresponding to the position of the inner side of the door frame 1 and the lock rod 43 after the aluminum alloy profile, and when the embedded pre-tightening door lock is used, a worker controls the lock rod 43 to slide in the sliding groove in the lower door plate 32 through the lock body 42, when one end of the lock rod 43 is inserted into the lock nest 44, the lower door plate 32 is fixed, and meanwhile, the basin-shaped part 41 is arranged in the mounting groove on one side of the lower door plate 32, so that no protrusion exists on the surface of the heat-preserving roller shutter door body 3.

The air-tight adhesive tape 2 of gassing formula includes adhesive tape main part 21, two adhesive tape main part 21 cartridge is inboard behind the aluminum alloy ex-trusions door frame 1, adhesive tape main part 21 input and pipeline 22 one end intercommunication, the pipeline 22 other end communicates with the integrative pump 23 output of gassing, it establishes in the packing box outside to fill integrative pump 23 to fill, during the use, starts to fill integrative pump 23 of gassing, fills the integrative pump 23 output and carries out the right amount of inflation to adhesive tape main part 21 inside through pipeline 22, later adhesive tape main part 21 hugs closely heat preservation rolling slats door body 3, reaches sealed effect, when heat preservation rolling slats door body 3 needs to open, fills gassing integrative pump 23 and carries out the air extraction to adhesive tape main part 21 through pipeline 22, makes heat preservation rolling slats door body 3 have enough intervals, can not cause the damage to adhesive tape main part 21 when guaranteeing that heat preservation rolling slats door body 3 rises and descends.

The first contact switch 24 is arranged in the lock nest 44 on one side, the first contact switch 24 is electrically connected with the air charging and discharging integrated pump 23, when the embedded pre-tightening door lock 4 is in a locking state in use, one end of the lock rod 43 contacts with the first contact switch 24 button, the air charging and discharging integrated pump 23 charges the adhesive tape main body 21, when the embedded pre-tightening door lock 4 is in a closing state, one end of the lock rod 43 is separated from the first contact switch 24 side button, and the air charging and discharging integrated pump 23 pumps air into the adhesive tape main body 21.

The safety locking mechanism 7 comprises a second contact switch 71, the output ends of the second contact switch 71 are electrically connected with the input ends of an electric limit 72, the electric limit 72 is fixedly arranged at the lower end of the guide rail 61, the output ends of the second contact switch 71 are electrically connected with the input ends of the electric hoist 5, when the thermal insulation rolling door body 3 moves under the action of the steel wire 51 in use, the upper end of the upper door plate block 34 contacts with a button on one side of the second contact switch 71, the second contact switch 71 controls the electric hoist 5 to automatically lock, meanwhile, the second contact switch 71 controls the electric limit 72 to start, the output ends of the electric limit 72 stretch out, if the electric hoist 5 is in locking failure, the electric limit 72 can effectively lock the thermal insulation rolling door body 3, and the two end bumps 321 of the lower door plate 32 are matched with an emergency locking device 73 for preventing the thermal insulation rolling door body 3 from rapidly descending.

The emergency locking device 73 comprises a sliding block 731, the sliding block 731 is arc-shaped, the sliding block 731 is slidably arranged in a mounting box 732, an emergency locking device 733 is matched with one end of the sliding block 731, the mounting box 732 is fixedly arranged on the inner side of a cargo compartment, when the thermal insulation rolling door body 3 descends, the surface of a protruding block 321 is contacted with the sliding block 731 and pushes the sliding block 731 to move, when the locking of the electric lifting machine 5 fails, the thermal insulation rolling door body 3 begins to descend rapidly, and meanwhile, the emergency locking device 733 is started to limit the thermal insulation rolling door body 3 to descend, so that accidents are prevented.

The above embodiment discloses a novel rolling shutter type rear door for a refrigerator car, wherein when the thermal insulation rolling shutter door body 3 needs to be fixed, a worker controls the lock rod 43 to slide in the sliding groove in the lower door plate 32 through the lock body 42, when one end of the lock rod 43 is inserted into the lock nest 44, the lower door plate 32 is fixed, the basin-shaped piece 41 is arranged in the mounting groove on one side of the lower door plate 32, no protrusion is arranged on the surface of the thermal insulation rolling shutter door body 3, meanwhile, one end of the lock rod 43 contacts with the first contact switch 24 button, the air charging and discharging integrated pump 23 charges the adhesive tape body 21, the air charging and discharging integrated pump 23 is started, the output end of the air charging and discharging integrated pump 23 charges the inside of the adhesive tape body 21 in a proper amount through the pipeline 22, then the adhesive tape body 21 is closely attached to the thermal insulation rolling shutter door body 3, the sealing effect is achieved, when goods need to be loaded and unloaded, the worker controls the lock rod 43 to slide in the sliding groove in the lower door plate 32 through the lock body 42, one end of the lock rod 43 is separated from the lock nest 44, one end of the lock rod 43 is separated from a button on one side of the first contact switch 24, the air charging and discharging integrated pump 23 pumps air in the adhesive tape main body 21, so that the heat-preserving roller shutter door body 3 has enough distance to ensure that the adhesive tape main body 21 is not damaged when the heat-preserving roller shutter door body 3 ascends and descends, the electric hoist 5 is started, the output end of the electric hoist 5 winds the steel wire 51, the steel wire 51 winds, one end of the steel wire 51 pulls the roller hinge 35 and the roller 37 through the dragging point 322 to roll on the guide rail 61 at the same time, thereby driving the heat-preserving roller shutter door body 3 to move, when the heat-preserving roller shutter door body 3 moves under the action of the steel wire 51, the upper end of the upper door plate block 34 contacts with the button on one side of the second contact switch 71, the second contact switch 71 controls the electric hoist 5 to automatically lock, meanwhile, the second contact switch 71 controls the electric limit 72 to start, the output end of the electric limit 72 stretches out, if the locking of the electric hoist 5 fails, the electric limit 72 can effectively lock the thermal insulation rolling door body 3, the two end projections 321 of the lower door plate 32 are matched with the emergency locking device 73 for preventing the thermal insulation rolling door body 3 from rapidly descending, when the thermal insulation rolling door body 3 needs to be closed, the small stroke push rod 62 is started, the output end of the small stroke push rod 62 pushes the upper door plate block 34 to enable the roller hinge 35 and the roller 37 to roll on the guide rail 61, meanwhile, the electric hoist 5 is started, the output end of the electric hoist 5 releases the steel wire 51, the thermal insulation rolling door body 3 descends at a uniform speed through the dead weight of the thermal insulation rolling door body 3 and the dragging of the steel wire 51, when the upper end of the upper door plate block 34 is separated from the button on one side of the second contact switch 71, the output end of the electric limit 72 retracts, the thermal insulation rolling door body 3 cannot be influenced, when the thermal insulation rolling door body 3 descends, the surface of the projections 321 contacts with the sliding block 731, the sliding block 731 is pushed, the rolling door body is pushed to roll, when the electric hoist 5 is locked, the thermal insulation rolling door body 3 descends rapidly, and unexpected stop is prevented, and the thermal insulation rolling door body is prevented from rapidly descending.

The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it is intended to cover the scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a novel rolling slats form back door for refrigerator car, includes door frame (1) and symmetrically set up guide rail (61) behind the aluminum alloy ex-trusions, door frame (1) behind the aluminum alloy ex-trusions and refrigerator car goods railway carriage or compartment open end fixed connection, a serial communication port, be equipped with on door frame (1) behind the aluminum alloy ex-trusions and be used for reducing the air conditioning outflow fill gassing formula airtight adhesive tape (2), guide rail (61) are fixed to be established in the carriage and are close to the inside both sides of open end, it is equipped with in the guide rail (61) to slide and be used for carrying out thermal insulation rolling slats door body (3) to the carriage inside, be equipped with on thermal insulation rolling slats door body (3) and be used for carrying out fixed embedded pretension lock (4) to thermal insulation rolling slats door body (3), door frame (1) inboard upper end and guide rail (61) position department are fixed behind the aluminum alloy ex-trusions are equipped with electric hoist (5), electric hoist (5) output tube is fixed and is equipped with steel wire (51), be equipped with on door frame (1) behind the aluminum alloy ex-trusions and be used for preventing thermal insulation rolling slats door body (3) and descend rapidly.

2. The novel rolling shutter type rear door for the refrigerated vehicle according to claim 1, wherein the aluminum alloy profile rear door frame (1) is composed of an upper door frame (11), a side door frame (12) and a lower door frame (13), the upper door frame (11), the side door frame (12) and the lower door frame (13) are all made of aluminum alloy materials, and the upper door frame (11), the side door frame (12) and the lower door frame (13) are of hard PVC heat-insulating bridge structures.

3. The novel rolling shutter type rear door for the refrigerated vehicle according to claim 1, wherein the heat-insulating rolling shutter door body (3) comprises a soft sealing block (31), a lower door plate block (32) is fixedly arranged at the upper end of the soft sealing block (31), a plurality of middle door plate blocks (33) are arranged at the upper end of the lower door plate block (32), an upper door plate block (34) is arranged at the upper end of the middle door plate block (33), and all the lower door plate blocks (32) and the middle door plate blocks (33) and the upper door plate blocks (34) are connected through hinges (36).

4. A novel rolling shutter type rear door for a refrigerated vehicle according to claim 3, wherein roller hinges (35) are respectively arranged at two ends of the joint of the lower door plate (32), the middle door plate (33) and the upper door plate (34), and rollers (37) are respectively arranged at two sides of the lower end of the lower door plate (32) and the upper end of the upper door plate (34).

5. The novel rolling type rear door for the refrigerated truck as set forth in claim 4, wherein two sides of the lower end of the lower door plate block (32) are provided with dragging points (322), and the dragging points (322) are fixedly connected with one end of the steel wire (51).

6. The novel rolling shutter type rear door for the refrigerated truck as claimed in claim 1, wherein the guide rail (61) is fixedly provided with a small-stroke push rod (62) near the tail end of the upper door plate block (34), and the guide rail (61) and the small-stroke push rod (62) are combined into a rail device (6).

7. The novel rolling shutter type rear door for the refrigerated vehicle according to claim 1, wherein the embedded pre-tightening door lock (4) comprises a basin-shaped part (41), the basin-shaped part (41) is fixedly arranged in a mounting groove on one side of the lower door plate block (32), a lock body (42) is matched with the basin-shaped part (41), a lock rod (43) is matched with the lock body (42), the two lock rods (43) are slidably arranged in a sliding groove in the lower door plate block (32), and a lock nest (44) is arranged at the position corresponding to the lock rod (43) on the inner side of the rear door frame (1) of the aluminum alloy section.

8. The novel rolling shutter type rear door for the refrigerated vehicle according to claim 7, wherein the air-tight rubber strip (2) comprises a rubber strip main body (21), two rubber strip main bodies (21) are clamped on the inner side of a rear door frame (1) of an aluminum alloy section, the input end of each rubber strip main body (21) is communicated with one end of a pipeline (22), the other end of each pipeline (22) is communicated with the output end of an air-tight integrated pump (23), the air-tight integrated pump (23) is fixedly arranged outside a container, a first contact switch (24) is arranged in one side of each lock nest (44), and the first contact switch (24) is electrically connected with the air-tight integrated pump (23).

9. The novel rolling shutter type rear door for the refrigerated truck according to claim 4, wherein the safety locking mechanism (7) comprises a second contact switch (71), the output ends of the two second contact switches (71) are electrically connected with the input end of an electric limiting switch (72), the electric limiting switch (72) is fixedly arranged at the lower end of a guide rail (61), the output end of the second contact switch (71) is electrically connected with the input end of an electric lifting machine (5), and an emergency locking device (73) for preventing the thermal insulation rolling shutter door body (3) from rapidly descending is matched with protruding blocks (321) at two ends of the lower door plate block (32).

10. The novel rolling shutter type rear door for a refrigerated vehicle according to claim 9, wherein the emergency locking device (73) comprises a sliding block (731), the sliding block (731) is arc-shaped, the sliding block (731) is slidably arranged in a mounting box (732), one end of the sliding block (731) is matched with the emergency locking device (733), and the mounting box (732) is fixedly arranged on the inner side of a cargo compartment.