Cold storage low-temperature roller shutter door capable of being rapidly opened and closed

Abstract

The utility model discloses a cold storage low-temperature roller shutter door capable of being quickly opened and closed, which comprises a door frame and a driving mechanism, a heat preservation door curtain is installed in the door frame in a sliding mode. The driving mechanism comprises a gear motor, a rolling shaft and a winding drum, the rolling shaft is rotationally installed at the upper end of the door frame, a driving shaft of the gear motor is in transmission connection with one end of the rolling shaft, the surface of the rolling shaft is rotationally sleeved with the winding drum, and a torsional spring is connected between the winding drum and the rolling shaft; the arrangement of the torsion spring ensures that a buffer space is provided for the furling drum when the speed reducing motor is instantly started, the pulling of the door curtain is gentle, the damage of impact force to the connecting part is avoided, the service life of the equipment is prolonged, and the use convenience and safety are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cold storage doors, and more specifically, relates to a cold storage low-temperature rolling shutter door which can be opened and closed quickly. Background Art

[0002] At present, rolling shutter doors are composed of multi-jointed door panels connected in series. In a fixed slideway, the door rotates up and down with the reel above the door as the center. Rolling shutter doors are widely used. Rolling shutter doors play the role of horizontal separation like walls. They are composed of curtain plates, seat plates, guide rails, supports, reels, boxes, control boxes, rolling door machines, limiters, door lintels, manual quick-release switch devices, push button switches and safety devices. They are generally installed in places where it is inconvenient to use walls for separation. With the rise of online shopping, the demand for cold chain logistics market has grown rapidly, and the industry has developed rapidly. The most critical part of cold chain logistics is cold storage warehousing and distribution. Cold storage generally transfers goods by forklifts. Therefore, more and more cold storages use low-temperature rolling shutter doors to replace conventional cold storage doors. Low-temperature rolling shutter doors have good sealing and thermal insulation, and have the advantages of isolation and heat preservation and preventing cold air from leaking out.

[0003] The above-mentioned prior art solutions have the following defects: during the opening or closing process, a motor is used to drive the reel to rotate to reel in or unreel the door curtain, and the impact generated during the driving brake can easily cause damage to the connection structure after long-term use. Utility Model Content

[0004] In order to solve the defects existing in the above-mentioned technology, the utility model provides a cold storage low-temperature rolling shutter door that can be opened and closed quickly, aiming to improve the problem of damage to the device caused by the instantaneous impact generated by starting and stopping.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A fast-opening and closing cold storage low-temperature rolling door, comprising a door frame and a driving mechanism;

[0007] A heat-insulating door curtain is slidably installed in the door frame; the driving mechanism includes a reduction motor, a winding shaft and a winding drum, the winding shaft is rotatably installed on the upper end of the door frame, the driving shaft of the reduction motor is transmission-connected to one end of the winding shaft, the winding drum is rotatably sleeved on the surface of the winding shaft, and a torsion spring is connected between the winding drum and the winding shaft.

[0008] In an embodiment of the utility model, a reel box is fixed to the top of the door frame, the reel drum is arranged in the reel box, and a lighting lamp is embedded at the lower end of the reel box.

[0009] The door frame is made of strong and durable materials. A retraction box is fixed at the top of the door frame. Inside the retraction box, there is a space for accommodating a retraction cylinder and the curtain that has been retracted. The retraction cylinder is used to retract the curtain, ensuring that the curtain is neat and orderly, and facilitating retraction and release. An illuminating lamp is embedded at the lower end of the retraction box. The illuminating lamp is designed to provide sufficient illumination for people entering the room, especially at night or in an environment with insufficient light. The illuminating lamp not only enhances the functionality of the interior but also improves the overall aesthetics. In addition, the curtain is made of sound-insulating and heat-insulating materials.

[0010] In an embodiment of the present utility model, the reduction motor is fixedly connected to the retraction box. A driving wheel is coaxially fixed to the driving shaft of the reduction motor. One end of the winding shaft is coaxially fixed with a driven wheel, and the driving wheel meshes with the driven wheel.

[0011] The reduction motor and the retraction box are fixedly connected through a bolt connection structure to ensure stable cooperation between the two. A driving wheel is coaxially fixed to the driving shaft of the reduction motor. The driving wheel is designed to engage in meshing transmission with the driven wheel. The driven wheel is fixedly connected to one end of the winding shaft. Through the meshing of the driving wheel and the driven wheel, the reduction motor drives the winding shaft; this device has a simple structure and high transmission efficiency.

[0012] In an embodiment of the present utility model, the retraction cylinder is provided with an accommodation cavity. The torsion spring is movably arranged in the accommodation cavity. A first radial restraint structure is provided at the connection between one end of the torsion spring and the inner wall of the accommodation cavity, and a second radial restraint structure is provided at the connection between the other end of the torsion spring and the winding shaft.

[0013] An accommodation cavity is opened inside the retraction cylinder, which is specifically used for accommodating the torsion spring and for the winding shaft to rotate through. The torsion spring is an elastic element used to store and release energy to maintain the radial elastic force between the retraction cylinder and the winding shaft. One end of the torsion spring is fixed to the inner wall of the accommodation cavity through the first radial restraint structure. This restraint structure can be any form of fixing method, such as clamping, bonding, or mechanical fastening, etc. Its main function is to limit the freedom degree of the torsion spring in the radial direction. The other end of the torsion spring is connected to the winding shaft through the second radial restraint structure, similarly restricting the freedom degree of the torsion spring and the winding shaft in the radial direction.

[0014] In an embodiment of the present utility model, a first stop block is fixed to the inner wall of the accommodation cavity, and a second stop block is fixed to the outer wall of the winding shaft. The first stop block and the second stop block are arranged correspondingly.

[0015] A first stopper is fixed to the inner wall of the accommodating chamber, and a second stopper is fixed to the outer wall of the winding shaft, which corresponds to the first stopper in the accommodating chamber, ensuring that the winding shaft is restrained during rotation, and is used to limit the rotation angle of the winding shaft to prevent damage to the torsion spring caused by excessive rotation. This design not only improves the structural stability of the device, but also optimizes the rotation angle of the winding shaft.

[0016] In one embodiment of the present invention, the first radial restriction structure includes

[0017] A gear ring fixed in the accommodating cavity, wherein the gear ring is coaxially arranged with the reel;

[0018] A first gasket ring fixed to the first end of the torsion spring, wherein a tooth groove is formed on the surface of the first gasket ring, and the tooth groove is engaged with the tooth ring;

[0019] A toothed ring is coaxially arranged in the receiving cavity of the reel. The toothed ring engages with the tooth groove on the surface of the first gasket ring to achieve radial restriction. It is used to provide restriction so that the elastic force of the torsion spring is transmitted to the reel, driving the reel to rotate, thereby achieving winding or releasing in a buffering form, mitigating instantaneous impact, and protecting the device structure.

[0020] In one embodiment of the present invention, the second radial restriction structure includes

[0021] a second backing ring fixed to the second end of the torsion spring;

[0022] A limit block fixedly connected to the second gasket, a limit groove is provided on the surface of the winding shaft, and the limit block is clamped in the limit groove;

[0023] A limit block cooperates with a limit groove on the surface of the reel to achieve clamping and limiting, which limits the radial rotation of the second gasket ring. The combined use of the gasket ring and the limit block prolongs the service life of the entire device.

[0024] In one embodiment of the utility model, the limit block is slidably arranged along the length direction of the limit groove, the second gasket ring is slidably sleeved on the surface of the winding shaft, and a compression spring is connected between the limit block and the winding shaft;

[0025] The sliding sleeve on the surface of the winding shaft is provided with a second gasket, and the limit block is slidably arranged along the length direction of the limit groove of the winding shaft to limit the movement of the second gasket and guide the second gasket to slide along the length direction of the winding shaft. The compression spring is connected between the limit block and the winding shaft to provide resilience for the limit block.

[0026] Compared with the prior art, the utility model has the following advantages:

[0027] Rotate the winding shaft installed at the upper end of the door frame, which is driven to rotate by a reduction motor. A torsion spring is connected between the winding cylinder and the winding shaft to realize the function of automatically winding or releasing the curtain. At the same time, the setting of the torsion spring ensures that when the reduction motor starts instantaneously, there is a buffer space for the winding cylinder, and the pulling of the curtain is relatively gentle, avoiding damage to the connection part caused by impact force, prolonging the service life of the equipment, and improving the convenience and safety of use. Brief Description of the Drawings

[0028] Figure 1 It is a schematic three-dimensional structure diagram of the rapid-opening and -closing cold storage low-temperature rolling curtain door in the embodiment of the present utility model;

[0029] Figure 2 It is a schematic three-dimensional structure diagram of the driving mechanism in the embodiment of the present utility model;

[0030] Figure 3 It is a schematic sectional structure diagram of the winding cylinder in the embodiment of the present utility model;

[0031] Figure 4 It is an exploded view of the winding cylinder in the embodiment of the present utility model;

[0032] Figure 5 It is a schematic three-dimensional structure diagram of the five torsion springs in the embodiment of the present utility model.

[0033] In the figure: 100, door frame; 110, heat-insulating curtain; 130, winding box; 300, driving mechanism; 310, reduction motor; 330, winding shaft; 331, second stop block; 333, limit groove; 335, sliding groove; 337, compression spring; 339, pull rod; 350, winding cylinder; 351, accommodation cavity; 353, first stop block; 355, toothed ring; 500, torsion spring; 510, first cushion ring; 530, second cushion ring; 531, limit block. Detailed Embodiment

[0034] In order to make the purpose, technical solution and advantages of the present utility model clearer, the following further details the present utility model in conjunction with embodiments.

[0035] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0036] In the embodiment, unless otherwise specified, the means used are all conventional means in the art.

[0037] Please refer to Figures 1 - 5 , this application provides a rapid-opening and -closing cold storage low-temperature rolling curtain door, including a door frame 100 and a driving mechanism 300;

[0038] A heat-insulating curtain 110 is slidably installed inside the door frame 100; the driving mechanism 300 includes a reduction motor 310, a winding shaft 330 and a winding cylinder 350. The winding shaft 330 is rotatably installed at the upper end of the door frame 100. One end of the driving shaft of the reduction motor 310 is in transmission connection with the winding shaft 330. The winding cylinder 350 is rotatably sleeved on the surface of the winding shaft 330, and a torsion spring 500 is connected between the winding cylinder 350 and the winding shaft 330.

[0039] The winding shaft 330 rotatably installed at the upper end of the door frame 100 is driven to rotate by the reduction motor 310. The winding cylinder 350 is connected to the winding shaft 330 through the torsion spring 500 to realize the function of automatically winding or releasing the curtain. At the same time, the setting of the torsion spring 500 ensures that when the reduction motor 310 starts instantaneously, there is a buffer space for the winding cylinder 350, and the pulling of the curtain is relatively gentle, avoiding damage to the connection part by the impact force, prolonging the service life of the equipment, and improving the convenience and safety of use.

[0040] In an embodiment of the present invention, a winding box 130 is fixed to the top of the door frame 100. The winding cylinder 350 is arranged inside the winding box 130, and a lighting lamp is embedded at the lower end of the winding box 130.

[0041] The door frame 100 is made of a strong and durable material. A winding box 130 is fixed to the top of the door frame 100. The winding box 130 has a space inside for accommodating the winding cylinder 350 and the curtain wound up. The winding cylinder 350 is used for winding the curtain to ensure that the curtain is neat and orderly, facilitating winding and releasing. A lighting lamp is embedded at the lower end of the winding box 130. The lighting lamp is designed to provide sufficient lighting for people entering the room, especially at night or in an environment with insufficient light. The lighting lamp not only enhances the functionality of the room but also improves the overall aesthetic. In addition, the curtain is made of sound-insulating and heat-insulating materials.

[0042] In an embodiment of the present invention, the reduction motor 310 is fixedly connected to the winding box 130. A driving wheel is coaxially fixed to the driving shaft of the reduction motor 310, and a driven wheel is coaxially fixed to one end of the winding shaft 330. The driving wheel meshes with the driven wheel.

[0043] The reduction motor 310 and the winding box 130 are fixedly connected through a bolt connection structure to ensure stable cooperation between the two. A driving wheel is coaxially fixed to the driving shaft of the reduction motor 310. The driving wheel is designed to engage and drive with the driven wheel. The driven wheel is fixedly connected to one end of the winding shaft 330. Through the engagement of the driving wheel and the driven wheel, the reduction motor 310 drives the winding shaft 330; the device has a simple structure and high transmission efficiency.

[0044] Please refer toFigures 3 - 4 , in an embodiment of the present utility model, the winding drum 350 is provided with a receiving cavity 351, the torsion spring 500 is movably arranged in the receiving cavity 351, a first radial restraint structure is arranged at the connection between one end of the torsion spring 500 and the inner wall of the receiving cavity 351, and a second radial restraint structure is arranged at the connection between the other end of the torsion spring 500 and the winding shaft 330.

[0045] The inside of the winding drum 350 is provided with a receiving cavity 351, which is specifically used for accommodating the torsion spring 500 and for the winding shaft 330 to rotate through. The torsion spring 500 is an elastic element used for storing and releasing energy to maintain the radial elastic force between the winding drum 350 and the winding shaft 330. One end of the torsion spring 500 is fixed to the inner wall of the receiving cavity 351 through the first radial restraint structure. This restraint structure can be any form of fixing method, such as clamping, bonding or mechanical fastening, etc. Its main function is to limit the freedom degree of the torsion spring 500 in the radial direction. The other end of the torsion spring 500 is connected to the winding shaft 330 through the second radial restraint structure, similarly restricting the freedom degree of the torsion spring 500 and the winding shaft 330 in the radial direction.

[0046] In an embodiment of the present utility model, a first stop block 353 is fixed to the inner wall of the receiving cavity 351, a second stop block 331 is fixed to the outer wall of the winding shaft 330, and the first stop block 353 and the second stop block 331 are arranged correspondingly.

[0047] A first stop block 353 is specifically fixed to the inner wall of the receiving cavity 351, and a second stop block 331 is fixed to the outer wall of the winding shaft 330, corresponding to the first stop block 353 in the receiving cavity 351, ensuring that the winding shaft 330 is resisted and limited during rotation, used for restricting the rotation angle of the winding shaft 330 to prevent excessive rotation from damaging the torsion spring 500. This design not only improves the structural stability of the device but also optimizes the rotation angle of the winding shaft 330.

[0048] In an embodiment of the present utility model, the first radial restraint structure includes

[0049] a toothed ring 355 fixed in the receiving cavity 351, and the toothed ring 355 is coaxially arranged with the winding drum 350;

[0050] a first cushion ring 510 fixed to the first end of the torsion spring 500, and tooth grooves are formed on the surface of the first cushion ring 510, and the tooth grooves are engaged with the toothed ring 355;

[0051] A toothed ring 355 is coaxially arranged in the accommodating cavity 351 opened in the winding drum 350. The toothed ring 355 engages with the tooth grooves on the surface of the first gasket ring 510 to achieve the function of radial restriction. It is used to provide restriction so that the elastic force of the torsion spring 500 is transmitted to the winding drum 350, driving the winding drum 350 to rotate, thereby realizing the winding or release in a buffer form, slowing down the instantaneous impact and protecting the device structure.

[0052] In an embodiment of the present utility model, the second radial restriction structure includes

[0053] A second gasket ring 530 fixed to the second end of the torsion spring 500;

[0054] A limiting block 531 fixedly connected to the second gasket ring 530. A limiting groove 333 is opened on the surface of the winding shaft 330, and the limiting block 531 is clamped in the limiting groove 333;

[0055] Through the cooperation of a limiting block 531 and the limiting groove 333 on the surface of the winding shaft 330, clamping and limiting are achieved. The radial rotation of the second gasket ring 530 is restricted. Through the combined use of the gasket ring and the limiting block 531, the service life of the entire device is prolonged.

[0056] In an embodiment of the present utility model, the limiting block 531 is slidably arranged along the length direction of the limiting groove 333. The second gasket ring 530 is slidably sleeved on the surface of the winding shaft 330, and a compression spring 337 is connected between the limiting block 531 and the winding shaft 330;

[0057] The second gasket ring 530 is slidably sleeved on the surface of the winding shaft 330. The limiting block 531 is slidably arranged along the length direction of the limiting groove 333 on the winding shaft 330, which is used to restrict the movement of the second gasket ring 530 and guide the second gasket ring 530 to slide along the length direction of the winding shaft 330. The compression spring 337 is connected between the limiting block 531 and the winding shaft 330 to provide a resilience force for the limiting block 531.

[0058] In an embodiment of the present utility model, a sliding groove 335 is opened along the length direction of the winding shaft 330. A pull rod 339 is slidably inserted into the sliding groove 335. One end of the pull rod 339 is fixed to the limiting block 531, the other end of the pull rod 339 extends to the end of the winding shaft 330, and a handheld part is arranged outside the winding shaft 330, and the handheld part is fixed to the end of the pull rod 339.

[0059] Through the fixation of the pull rod 339 and the limit block 531, the design of the handheld part enables the user to easily hold it and conveniently pull the pull rod 339 to slide. By pulling the pull rod 339, the compression spring 337 is compressed. At the same time, the tooth grooves on the surface of the first gasket ring 510 fixed at one end of the torsion spring 500 are separated from the toothed ring 355, so that the driving connection relationship between the winding shaft 330 and the winding cylinder 350 is disconnected, which is convenient for operation and use in the required situations and improves the functional characteristics of the device. This structure is simple and easy to operate, and can effectively improve the convenience of use.

[0060] The above-described embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent.

[0061] It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A fast-opening and closing cold storage low-temperature rolling shutter door, characterized in that: It comprises a door frame (100), wherein a heat-insulating door curtain (110) is slidably installed in the door frame (100); A driving mechanism (300), the driving mechanism (300) comprising a reduction motor (310), a winding shaft (330) and a winding drum (350), the winding shaft (330) being rotatably mounted on the upper end of the door frame (100), the driving shaft of the reduction motor (310) being transmission-connected to one end of the winding shaft (330), the winding drum (350) being rotatably sleeved on the surface of the winding shaft (330), and a torsion spring (500) being connected between the winding drum (350) and the winding shaft (330).

2. The fast opening and closing cold storage low-temperature rolling shutter door according to claim 1 is characterized in that: A reel box (130) is fixed on the top of the door frame (100), the reel drum (350) is arranged in the reel box (130), and a lighting lamp is embedded at the lower end of the reel box (130).

3. The fast opening and closing cold storage low-temperature rolling shutter door according to claim 2 is characterized in that: The reduction motor (310) is fixedly connected to the reel box (130), a driving wheel is coaxially fixed to the driving shaft of the reduction motor (310), a driven wheel is coaxially fixed to one end of the reel shaft (330), and the driving wheel is meshed with the driven wheel.

4. The fast opening and closing cold storage low-temperature rolling shutter door according to claim 1 is characterized in that: The winding drum (350) is provided with a accommodating cavity (351), and the torsion spring (500) is movably arranged in the accommodating cavity (351). A first radial restraint structure is arranged at a connection between one end of the torsion spring (500) and the inner wall of the accommodating cavity (351), and a second radial restraint structure is arranged at a connection between the other end of the torsion spring (500) and the winding shaft (330).

5. The fast opening and closing cold storage low-temperature rolling shutter door according to claim 4 is characterized in that: A first stopper (353) is fixed to the inner wall of the accommodating cavity (351), and a second stopper (331) is fixed to the outer wall of the winding shaft (330), and the first stopper (353) and the second stopper (331) are arranged correspondingly.

6. The fast opening and closing cold storage low-temperature rolling shutter door according to claim 4 is characterized in that: The first radial restriction structure includes a gear ring (355) fixed in the accommodating cavity (351), the gear ring (355) being coaxially arranged with the reel (350); A first gasket (510) is fixed to the first end of the torsion spring (500), wherein a tooth groove is provided on the surface of the first gasket (510), and the tooth groove is engaged with the tooth ring (355).

7. The fast opening and closing cold storage low-temperature rolling shutter door according to claim 4 is characterized in that: The second radial restriction structure includes A second gasket (530) fixed to the second end of the torsion spring (500); A limit block (531) is fixedly connected to the second gasket (530), and a limit groove (333) is provided on the surface of the winding shaft (330), and the limit block (531) is clamped in the limit groove (333).

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