Fixing structure used in container

By designing a fixed structure for the inside of the energy storage container, the local stress concentration problem caused by the increase in battery weight and insufficient support components during long-distance transportation of the energy storage container is solved, and the structural strength is improved and the flexibility of battery loading is achieved.

CN223015452UActive Publication Date: 2025-06-24SHENZHEN HUIJI TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202421446490.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-24
Publication Date
2025-06-24
Estimated Expiration
2034-06-24

AI Technical Summary

Technical Problem

During long-distance transportation, existing energy storage containers have increased battery weight and insufficient support components, resulting in local stress concentration, which may cause damage or breakage of the energy storage container.

Method used

A fixed structure for the inside of a container is designed, including a pair of side panels, a first connecting plate, a first slide plate, a fixing assembly, etc., and the structure strength is enhanced through sliding connections and spring devices.

Benefits of technology

Through this fixed structure, the structural strength of the energy storage container is improved, flexible loading of batteries of various sizes is achieved, and the risk of damage to the battery during transportation is reduced.

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Abstract

The utility model belongs to the field of energy storage containers, and particularly relates to a fixing structure used in a container, which comprises a pair of side plates. Two first connecting plates are fixedly connected between the adjacent side plates; a plurality of first sliding plates are connected between the adjacent first connecting plates in a sliding manner; the inner side wall of the first sliding plate is slidably connected with a plurality of fixing assemblies. Second toothed plates are symmetrically and fixedly connected to the middle of the first sliding plate. A plurality of first fixing grooves are formed in the middle of the first connecting plate; a first spring is fixedly connected to the middle of the first fixing groove. The end part of the first spring is fixedly connected with a sliding rod; a connecting rod is hinged to the middle of the sliding rod. A first toothed plate is hinged to the end part of the connecting rod; the first toothed plate is in sliding connection with the first fixing groove; by arranging the multiple first sliding plates, the structural strength of the frame in the device is improved, the strength of supporting the device by the first connecting plates and the second connecting plates is enhanced, and then the overall structural strength of the device is improved.
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Description

Technical Field

[0001] The utility model relates to the field of energy storage containers, in particular to a fixing structure for the interior of a container. Background Technique

[0002] An energy storage container is a device that integrates a battery energy storage system into a container, featuring mobility, modularity, safety and reliability. It can store and release energy through charge and discharge control, and thus can be flexibly applied to various scenarios, such as microgrids, energy conservation and emission reduction, power peak shaving, etc. The transportation mode of energy storage containers usually adopts truck transportation.

[0003] Truck transportation is an important logistics method. Goods are transported from one place to another by specialized trucks. The types of trucks involved in truck transportation are diverse, including ordinary trucks, van trucks, refrigerated trucks, dump trucks, tank trucks, container trucks, etc. These trucks have their own characteristics and are suitable for transporting different types of goods.

[0004] The existing energy storage container stores a large number of batteries inside, which will increase the weight of the energy storage container. The supporting components of the energy storage container mainly rely on the supporting columns at the corners to provide structural strength. When the length of the energy storage container is too long, the situation of regional stress concentration will occur, which will further lead to local damage or fracture of the energy storage container.

[0005] Therefore, in view of the above problems, a fixing structure for the interior of a container is proposed. Content of the Utility Model

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background technique.

[0007] The technical solution adopted by the present utility model to solve its technical problems is as follows: A fixing structure for the interior of a container according to the present utility model includes a pair of side plates; two first connecting plates are fixedly connected between adjacent side plates; a plurality of first sliding plates are slidably connected between adjacent first connecting plates; a plurality of fixing components are slidably connected to the inner side wall of the first sliding plate; second toothed plates are symmetrically fixedly connected to the middle of the first sliding plate; a plurality of first fixing grooves are formed in the middle of the first connecting plate; a first spring is fixedly connected to the middle of the first fixing groove; a sliding rod is fixedly connected to the end of the first spring; a connecting rod is hinged to the middle of the sliding rod; a first toothed plate is hinged to the end of the connecting rod; the first toothed plate is slidably connected to the first fixing groove; the first toothed plate and the second toothed plate are arranged correspondingly; two second connecting plates are fixedly connected between adjacent side plates; the second connecting plates are located above the first connecting plates; the first sliding plate and the second connecting plates are in a sliding connection relationship; pulling the sliding rod can make the first sliding plate lose the friction between the second toothed plate and the first toothed plate, realizing the quick disassembly of the first sliding plate by the device, improving the convenience of adjusting the first sliding plate by the device, enabling the device to load batteries of various sizes, increasing the adaptability and flexibility of the device to load batteries of various sizes, and at the same time, by arranging a plurality of first sliding plates, the strength of the internal frame structure of the device is improved, enhancing the strength of the first connecting plate and the second connecting plate to support the device, and further improving the overall structural strength of the device.

[0008] Preferably, the fixing component includes a second sliding plate; a plurality of partition plates are fixedly connected to the top of the second sliding plate; a plurality of sliding grooves are symmetrically formed in the inner side wall of the first sliding plate; a plurality of circular holes are symmetrically formed in the middle of the first sliding plate; the second sliding plate is slidably connected to the sliding grooves; inserting pins into the circular holes at different heights can adjust the distance between the second sliding plates, enabling the second sliding plates to load batteries of different heights and increasing the adaptability of the device to load batteries of various sizes.

[0009] Preferably, a plurality of second springs are symmetrically fixedly connected to the middle of the partition plate; pressing plates are fixedly connected to the ends of adjacent second springs; through the combined action of the second springs and the pressing plates, the partition plates can fix batteries of different widths, further increasing the adaptability of the device to load batteries of different shapes and sizes.

[0010] Preferably, a plurality of second fixing grooves are symmetrically formed in the middle of the partition plate; a third spring is fixedly connected to the middle of the second fixing groove; a plurality of fixing rods are fixedly connected to the middle of the pressing plate; the fixing rods and the second fixing grooves are arranged correspondingly and are in sliding fit; through the combined action of the fixing rods and the second fixing grooves, the second fixing grooves will limit the fixing rods and reduce the amplitude of vibration when the battery is impacted, reducing the possibility of the battery falling off and increasing the stability of the device to fix the battery.

[0011] Preferably, a sponge is fixedly connected to the middle of the pressing plate; the pressing plate is located between the sponge and the partition; when the pressing plate presses the battery under the elastic force of the second spring, the sponge will also move closer to the battery together with the pressing plate and press the battery. Since the sponge is a flexible material, the sponge will reduce the indentation left on the surface of the battery when it is pressed by the pressing plate, and reduce the damage to the battery caused by the extrusion.

[0012] Preferably, a plurality of threaded rods are rotatably connected to the middle of the first connecting plate; a rotating plate is fixedly connected to the end of the threaded rod; a third connecting plate is fixedly connected to the middle of the sliding rod; the third connecting plate and the adjacent threaded rod are in a threaded connection relationship; when the staff needs to pull the sliding rod, the rotating plate can be rotated so that the rotating plate drives the threaded rod to rotate together. When the threaded rod rotates, the third connecting plate will move along the threaded rod, and when the third connecting plate moves, it will drive the sliding rod to move together; rotating the rotating plate can make the third connecting plate drive the sliding rod to move along the threaded rod, reducing the energy required for the staff to adjust the sliding rod and improving the convenience of the device to adjust the first sliding plate.

[0013] Preferably, a third fixing groove is formed in the middle of the rotating plate; the third fixing groove is of a wavy structure; because the third fixing groove is formed on the surface of the rotating plate, when the staff rotates the rotating plate, the third fixing groove will increase the contact area between the staff and the rotating plate. At the same time, because the third fixing groove is of a wavy structure, it further increases the contact area between the staff and the rotating plate, increases the friction force when rotating the rotating plate, and improves the convenience of rotating the rotating plate.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. For a fixing structure inside a container according to the present utility model, pulling the sliding rod can make the first sliding plate lose the friction between the second tooth plate and the first tooth plate, realizing the quick disassembly of the first sliding plate by the device, improving the convenience of the device to adjust the first sliding plate, enabling the device to load batteries of various sizes, increasing the adaptability and flexibility of the device to load batteries of various sizes, and at the same time, by arranging a plurality of first sliding plates, the strength of the internal frame structure of the device is improved, enhancing the strength of the first connecting plate and the second connecting plate to support the device, and further improving the overall structural strength of the device.

[0016] 2. For a fixing structure inside a container according to the present utility model, inserting pins into round holes at different heights can adjust the distance between the second sliding plates, enabling the second sliding plates to load batteries at different heights, and increasing the adaptability of the device to load batteries of various sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Schematic diagram of the main body of the present invention;

[0019] Figure 2 Schematic diagram of the structure of the second connecting plate in the present invention;

[0020] Figure 3 Schematic diagram of the structure of the first toothed plate in the present invention;

[0021] Figure 4 Schematic diagram of the structure of the round hole in the present invention;

[0022] Figure 5 Schematic diagram of the structure of the second fixing groove in the present invention;

[0023] Figure 6 Schematic diagram of the structure of the third fixing groove in the present invention.

[0024] In the figure: 1, side plate; 102, first connecting plate; 103, first fixing groove; 104, first spring; 105, sliding rod; 106, first toothed plate; 107, connecting rod; 108, first sliding plate; 109, fixing component; 110, second toothed plate; 111, second connecting plate; 2, chute; 22, round hole; 23, second sliding plate; 24, partition; 3, second spring; 32, pressing plate; 4, fixing rod; 42, second fixing groove; 43, third spring; 5, sponge; 6, threaded rod; 62, rotating plate; 63, third connecting plate; 7, third fixing groove. Detailed implementation manners

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0026] The following gives specific embodiments.

[0027] Please refer to Figures 1 to 4As shown in the figure, a fixing structure for the interior of a container according to an embodiment of the present utility model includes a pair of side plates 1; two first connecting plates 102 are fixedly connected between adjacent side plates 1; a plurality of first sliding plates 108 are slidably connected between adjacent first connecting plates 102; a plurality of fixing components 109 are slidably connected to the inner side walls of the first sliding plates 108; second toothed plates 110 are symmetrically and fixedly connected to the middle of the first sliding plates 108; a plurality of first fixing grooves 103 are formed in the middle of the first connecting plates 102; a first spring 104 is fixedly connected to the middle of the first fixing grooves 103; a sliding rod 105 is fixedly connected to the end of the first spring 104; a connecting rod 107 is hinged to the middle of the sliding rod 105; a first toothed plate 106 is hinged to the end of the connecting rod 107; the first toothed plate 106 is slidably connected to the first fixing groove 103; the first toothed plate 106 and the second toothed plate 110 are arranged correspondingly; two second connecting plates 111 are fixedly connected between adjacent side plates 1; the second connecting plates 111 are located above the first connecting plates 102; the first sliding plates 108 and the second connecting plates 111 are in a sliding connection relationship; during work, the first sliding plate 108 can be slid along the first connecting plate 102. After the first sliding plate 108 slides to a suitable position where the first toothed plate 106 is located, it can stop moving. When the first sliding plate 108 moves, it will drive the second toothed plate 110 to move together. When the second toothed plate 110 moves, it will come into contact with the first toothed plate 106 and engage with the first toothed plate 106. The first sliding plate 108 will stop moving and be fixed under the frictional action between the first toothed plate 106 and the second toothed plate 110. Subsequently, the staff can place the battery on the top of the fixing component 109 and then transport the device. When it is necessary to remove the first sliding plate 108, the sliding rod 105 can be pulled. When the sliding rod 105 moves, it will drive the connecting rod 107 to move together. When the connecting rod 107 moves, its angle will change and it will drive the first toothed plate 106 to move together. The first toothed plate 106 will slide along the first fixing groove 103 and move away from the second toothed plate 110, so that the frictional force between the first sliding plate 108 and the second toothed plate 110 is reduced until it disappears. At this time, the staff can slide the first sliding plate 108 to other positions and perform the next operation; pulling the sliding rod 105 can make the first sliding plate 108 lose the friction between the second toothed plate 110 and the first toothed plate 106, realizing the rapid disassembly of the device for the first sliding plate 108, improving the convenience of the device for adjusting the first sliding plate 108, enabling the device to load batteries of various sizes, increasing the adaptability and flexibility of the device for loading batteries of various sizes. At the same time, by arranging a plurality of first sliding plates 108, the strength of the internal frame structure of the device is improved, and the strength of the first connecting plate 102 and the second connecting plate 111 for supporting the device is enhanced, thereby improving the overall structural strength of the device.

[0028] Please refer to Figure 4As shown, the fixing component 109 includes a second slide plate 23; a plurality of partition plates 24 are fixedly connected to the top of the second slide plate 23; sliding grooves 2 are symmetrically formed in the inner side wall of the first slide plate 108; a plurality of round holes 22 are symmetrically formed in the middle of the first slide plate 108; the second slide plate 23 is slidably connected to the sliding grooves 2; the staff can slide the second slide plate 23 to slide along the sliding grooves 2. After sliding to the position of the round hole 22 at a suitable height, a plug pin can be inserted so that the plug pin penetrates through the round hole 22 and fixes the second slide plate 23. Subsequently, the staff can place the battery between the partition plates 24; inserting the plug pin into the round holes 22 at different heights can adjust the distance between the second slide plates 23, so that the second slide plates 23 can load batteries of different heights, increasing the adaptability of the device to loading batteries of various sizes.

[0029] Please refer to Figure 4 and Figure 5 As shown, a plurality of second springs 3 are symmetrically and fixedly connected to the middle of the partition plate 24; the ends of adjacent second springs 3 are fixedly connected with a pressing plate 32; when the battery is placed between the partition plates 24, the battery will come into contact with the pressing plate 32 and extrude the pressing plate 32. After the pressing plate 32 is extruded, it will transmit the pressure to the second spring 3 so that the second spring 3 is in a compressed state. Subsequently, the second spring 3 will release elastic potential energy and apply an elastic force to the pressing plate 32, and the pressing plate 32 will extrude the side wall of the battery under the elastic force of the second spring 3; through the combined action of the second spring 3 and the pressing plate 32, the partition plate 24 can fix batteries of different widths, further increasing the adaptability of the device to loading batteries of different shapes and sizes.

[0030] Please refer to Figure 5As shown, a plurality of second fixing grooves 42 are symmetrically formed in the middle of the partition plate 24; a third spring 43 is fixedly connected to the middle of the second fixing groove 42; a plurality of fixing rods 4 are fixedly connected to the middle of the pressing plate 32; the fixing rods 4 and the second fixing grooves 42 are correspondingly arranged and are in sliding fit; when the pressing plate 32 approaches the partition plate 24 along with the second spring 3, the fixing rods 4 will also move together with the second spring 3 and enter the inside of the second fixing grooves 42. During the movement of the fixing rods 4, they will come into contact with the third spring 43. When the device is impacted, the impact generated will be transmitted to the first sliding plate 108, the first sliding plate 108 will transmit the vibration effect to the second sliding plate 23, the second sliding plate 23 will transmit the vibration effect to the partition plate 24, and then the partition plate 24 will transmit the vibration effect to the battery. When the battery vibrates, it will drive the pressing plate 32 to vibrate together, and the pressing plate 32 will transmit the vibration to the fixing rods 4, causing the fixing rods 4 to vibrate. Since the fixing rods 4 are inside the second fixing grooves 42, the vibration amplitude of the fixing rods 4 is limited. The fixing rods 4 will reduce the vibration amplitude of the pressing plate 32 under the limiting action of the second fixing grooves 42, thereby reducing the vibration amplitude of the battery; through the cooperation of the fixing rods 4 and the second fixing grooves 42, the second fixing grooves 42 will limit the fixing rods 4 and reduce the vibration amplitude of the battery when it is impacted, reducing the possibility of the battery falling off and increasing the stability of the device for fixing the battery.

[0031] Please refer to Figure 5 As shown, a sponge 5 is fixedly connected to the middle of the pressing plate 32; the pressing plate 32 is located between the sponge 5 and the partition plate 24; when the pressing plate 32 presses the battery under the elastic force of the second spring 3, the sponge 5 will also approach the battery together with the pressing plate 32 and press the battery. Since the sponge 5 is a flexible material, the sponge 5 will reduce the indentation left on the surface of the battery when it is pressed by the pressing plate 32 and reduce the damage to the battery caused by the extrusion.

[0032] Please refer to Figure 3 and Figure 6 As shown, a plurality of threaded rods 6 are rotatably connected to the middle of the first connecting plate 102; a rotating plate 62 is fixedly connected to the end of the threaded rod 6; a third connecting plate 63 is fixedly connected to the middle of the sliding rod 105; the third connecting plate 63 and the adjacent threaded rods 6 are in a threaded connection relationship; when the staff needs to pull the sliding rod 105, they can rotate the rotating plate 62 so that the rotating plate 62 drives the threaded rod 6 to rotate together. When the threaded rod 6 rotates, it will cause the third connecting plate 63 to move along the threaded rod 6. When the third connecting plate 63 moves, it will drive the sliding rod 105 to move together; rotating the rotating plate 62 can cause the third connecting plate 63 to drive the sliding rod 105 to move along the threaded rod 6, reducing the energy required for the staff to adjust the sliding rod 105 and improving the convenience of adjusting the first sliding plate 108 of the device.

[0033] Please refer to Figure 6As shown, a third fixing groove 7 is formed in the middle of the rotating plate 62; the third fixing groove 7 is of a wavy structure; since the third fixing groove 7 is formed on the surface of the rotating plate 62, when the staff rotates the rotating plate 62, the third fixing groove 7 will increase the contact area between the staff and the rotating plate 62. At the same time, because the third fixing groove 7 is of a wavy structure, it further increases the contact area between the staff and the rotating plate 62, increases the friction when rotating the rotating plate 62, and improves the convenience of rotating the rotating plate 62.

[0034] Working principle: The first sliding plate 108 can slide along the first connecting plate 102. After the first sliding plate 108 slides to the position of the appropriate first toothed plate 106, it can stop moving. When the first sliding plate 108 moves, it will drive the second toothed plate 110 to move together. When the second toothed plate 110 moves, it will come into contact with the first toothed plate 106 and engage with the first toothed plate 106. The first sliding plate 108 will stop moving and be fixed under the frictional force between the first toothed plate 106 and the second toothed plate 110. Subsequently, the staff can place the battery on the top of the fixing component 109 and then transport the device. When it is necessary to remove the first sliding plate 108, the sliding rod 105 can be pulled. When the sliding rod 105 moves, it will drive the connecting rod 107 to move together. When the connecting rod 107 moves, its angle will change and it will drive the first toothed plate 106 to move together. The first toothed plate 106 will slide along the first fixing groove 103 and move away from the second toothed plate 110, so that the frictional force between the first sliding plate 108 and the second toothed plate 110 on the first sliding plate 108 decreases until it disappears. At this time, the staff can slide the first sliding plate 108 to other positions and perform the next operation; the staff can slide the second sliding plate 23 to slide it along the chute 2. When it slides to the position of the circular hole 22 at the appropriate height, a pin can be inserted so that the pin penetrates the circular hole 22 and fixes the second sliding plate 23. Subsequently, the staff can place the battery between the partitions 24; when the battery is placed between the partitions 24, the battery will come into contact with the pressure plate 32 and squeeze the pressure plate 32. After the pressure plate 32 is squeezed, it will transmit the pressure to the second spring 3, making the second spring 3 in a compressed state. Subsequently, the second spring 3 will release its elastic potential energy and exert an elastic force on the pressure plate 32. The pressure plate 32 will squeeze the side wall of the battery under the elastic force of the second spring 3; when the pressure plate 32 approaches the partition 24 along with the second spring 3, the fixing rod 4 will also move with the second spring 3 and enter the inside of the second fixing groove 42. During the movement of the fixing rod 4, it will come into contact with the third spring 43. When the device is impacted, the impact generated will be transmitted to the first sliding plate 108. The first sliding plate 108 will transmit the vibration effect to the second sliding plate 23. The second sliding plate 23 will transmit the vibration effect to the partition 24. Subsequently, the partition 24 will transmit the vibration effect to the battery. When the battery vibrates, it will drive the pressure plate 32 to vibrate together. The pressure plate 32 will transmit the vibration to the fixing rod 4, causing the fixing rod 4 to vibrate. Because the fixing rod 4 is inside the second fixing groove 42, the vibration amplitude of the fixing rod 4 is limited. The fixing rod 4 will reduce the vibration amplitude of the pressure plate 32 under the limiting action of the second fixing groove 42, thereby reducing the vibration amplitude of the battery; when the pressure plate 32 squeezes the battery under the elastic force of the second spring 3, the sponge 5 will also approach the battery and squeeze the battery along with the pressure plate 32. Because the sponge 5 is a flexible material, the sponge 5 will reduce the indentation left on the surface of the battery when the battery is squeezed by the pressure plate 32, reducing the damage to the battery caused by the squeeze;When it is necessary to pull the sliding rod 105, the staff can rotate the rotating plate 62 so that the rotating plate 62 drives the threaded rod 6 to rotate together. When the threaded rod 6 rotates, the third connecting plate 63 will move along the threaded rod 6. When the third connecting plate 63 moves, it will drive the sliding rod 105 to move together; rotating the rotating plate 62 can make the third connecting plate 63 drive the sliding rod 105 to move along the threaded rod 6, reducing the energy required for the staff to adjust the sliding rod 105 and improving the convenience of the device for adjusting the first sliding plate 108; because the third fixing groove 7 is formed on the surface of the rotating plate 62, when the staff rotates the rotating plate 62, the third fixing groove 7 will increase the contact area between the staff and the rotating plate 62. At the same time, because the third fixing groove 7 is of a wavy structure, it further increases the contact area between the staff and the rotating plate 62, increases the friction force when rotating the rotating plate 62, and improves the convenience of rotating the rotating plate 62.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A fixed structure for use inside a container, comprising a pair of side panels (1), characterized in that: Two first connecting plates (102) are fixedly connected between adjacent side plates (1); a plurality of first sliding plates (108) are slidably connected between adjacent first connecting plates (102); a plurality of fixing components (109) are slidably connected to the inner side wall of the first sliding plate (108); a second tooth plate (110) is symmetrically fixedly connected to the middle of the first sliding plate (108); a plurality of first fixing grooves (103) are opened in the middle of the first connecting plate (102); a first spring (104) is fixedly connected to the middle of the first fixing groove (103); and the end of the first spring (104) is fixedly connected to A sliding rod (105); a connecting rod (107) is hingedly connected in the middle of the sliding rod (105); a first tooth plate (106) is hingedly connected at the end of the connecting rod (107); the first tooth plate (106) and the first fixing groove (103) are slidably connected; the first tooth plate (106) and the second tooth plate (110) are correspondingly arranged; two second connecting plates (111) are fixedly connected between adjacent side plates (1); the second connecting plate (111) is located above the first connecting plate (102); the first sliding plate (108) and the second connecting plate (111) are both slidably connected.

2. A fixing structure for use inside a container according to claim 1, characterized in that: The fixing assembly (109) comprises a second slide plate (23); a plurality of partition plates (24) are fixedly connected to the top of the second slide plate (23); a slide groove (2) is symmetrically provided on the inner side wall of the first slide plate (108); a plurality of circular holes (22) are symmetrically provided in the middle of the first slide plate (108); and the second slide plate (23) and the slide groove (2) are slidably connected.

3. A fixing structure for use inside a container according to claim 2, characterized in that: A plurality of threaded rods (6) are rotatably connected to the middle of the first connecting plate (102); a rotating plate (62) is fixedly connected to the end of the threaded rod (6); a third connecting plate (63) is fixedly connected to the middle of the sliding rod (105); and the third connecting plate (63) and the adjacent threaded rod (6) are in a threaded connection relationship.