A locking device

Abstract

The present invention provides a locking device, comprising a support frame, a first limiting assembly, a rotating assembly, and a second limiting assembly, wherein the first limiting assembly is connected to the rotating assembly, and the rotating assembly is provided with a first mounting hole and a first sliding slot; the rotating assembly has a first position and a second position relative to the support frame, when the rotating assembly is in the first position, the first limiting assembly folds relative to the support frame, and the support frame can be fixed to the support frame via the first sliding slot and the first mounting hole, so that the rotating assembly switches from the first position to the second position, and when the rotating assembly is in the second position, the first limiting assembly unfolds relative to the support frame and abuts against the transported goods, so that the first limiting assembly restricts the first degree of freedom of the transported goods, and the second limiting assembly is provided on the support frame, and the first limiting assembly and the second limiting assembly jointly lock the transported goods to the support frame. The locking device facilitates loading and unloading of transported goods, thereby improving the efficiency of loading and unloading of transported goods.

Description

Technical Field

[0001] The present invention relates to the technical field of cargo transportation devices, and in particular to a locking device. Background Art

[0002] During the transportation of goods, the goods are prone to shaking and shifting due to external forces. Therefore, it is necessary to lock the goods during transportation. The locking structure in the existing technology is fixed to the support frame by bolts, and the locking structure is vertically arranged on the support frame. The vertical locking structure can stably lock the goods, but the operator needs to avoid the vertical locking structure during the loading and unloading process. That is, the vertical locking structure will hinder the loading and unloading of goods, making it inconvenient for loading and unloading of goods and reducing the efficiency of loading and unloading. Summary of the Invention

[0003] An object of the present invention is to solve the technical problems of the prior art and to provide a locking device capable of locking transported goods.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A locking device, comprising:

[0006] Support frame;

[0007] a first limiting component;

[0008] The first limiting component is connected to the rotating component, and the rotating component is provided with a first mounting hole and a first sliding slot; the rotating component has a first position and a second position relative to the support frame, and when the rotating component is in the first position, the first limiting component is folded relative to the support frame, and the rotating component can rotate relative to the support frame with the first sliding slot as the rotation axis, and can slide relative to the support frame along the first sliding slot, and the rotating component can be fixed to the support frame through the first sliding slot and the first mounting hole, so that the rotating component switches from the first position to the second position, and when the rotating component is in the second position, the first limiting component is unfolded relative to the support frame and abuts against the transported goods, so that the first limiting component limits the first degree of freedom of the transported goods, and the rotating component can rotate relative to the support frame to switch between the first position and the second position;

[0009] A second limiting component is provided on the support frame, and the second limiting component abuts against the transported goods to limit the second degree of freedom of the transported goods, so that the first limiting component and the second limiting component jointly lock the transported goods on the support frame.

[0010] Furthermore, the rotating assembly includes a first rotating member, a first fastening member, and a second fastening member, the first rotating member is connected to the first limiting assembly, the first mounting hole and the first sliding groove are provided on the first rotating member, and the support frame is provided with a second mounting hole and a third mounting hole;

[0011] The first rotating member has a third position and a fourth position relative to the support frame, and the first rotating member can rotate relative to the support frame around the first fastener so that the first rotating member switches between the third position and the fourth position; when the first rotating member is in the third position, the first limiting assembly is folded relative to the support frame, and the first fastener is arranged at one end of the first sliding groove and passes through the first mounting hole and the second mounting hole; when the first rotating member is in the fourth position, the first limiting assembly is unfolded relative to the support frame, the second fastener passes through the third mounting hole, and the first fastener is arranged at the other end of the first sliding groove.

[0012] Furthermore, the first rotating member includes a first plate and a second plate, one end of the first plate is connected to the first limiting assembly, and the other end is connected to the second plate, the first mounting hole is set on the first plate, and the first sliding groove is set on the second plate.

[0013] Furthermore, the rotating assembly also includes a second rotating member, which is connected to an end of the first limiting assembly away from the first rotating member. The second rotating member is provided with a second sliding groove, the second sliding groove and the first sliding groove are arranged opposite to each other, and the first fastener is passed through the second sliding groove.

[0014] Furthermore, the second limiting component includes a first limiting member, a third rotating member and a third fastener, the first limiting member is arranged on the support frame, the first limiting member abuts against the transported goods, the third rotating member is rotatably connected to the first limiting member, and the third rotating member is provided with a fourth mounting hole, the third fastener is passed through the fourth mounting hole and extends into the limiting hole of the transported goods.

[0015] Furthermore, the third rotating member includes a third plate and a fourth plate, one end of the third plate is connected to the first limiting member, and the other end is connected to the fourth plate, and the third fastener is provided on the fourth plate.

[0016] Furthermore, the second limiting component also includes a second limiting member, a latch and a guide cylinder. The second limiting member is arranged on the support frame, the guide cylinder is arranged on the side of the second limiting member, the latch is slidably arranged in the guide cylinder, and partially extends above the second limiting member. The second limiting member and the latch form a limiting space to limit the transported goods.

[0017] Furthermore, the guide cylinder is provided with a third sliding groove, which is arranged in the direction of the second limiting member. The end of the latch away from the second limiting member is provided with a protrusion, which can slide in the third sliding groove.

[0018] Furthermore, the second limiting assembly also includes an elastic member, which is sleeved on the outer periphery of the pin and abuts against the side of the second limiting member facing the guide cylinder. The elastic member is used to provide an elastic force to the pin away from the second limiting member. The guide cylinder is provided with a fourth sliding groove, and the protrusion can slide in the fourth sliding groove. The extension direction of the fourth sliding groove and the extension direction of the third sliding groove have an angle.

[0019] Furthermore, the first limiting assembly, the rotating assembly and the second limiting assembly form a fixing unit, and the fixing unit is provided in plurality, and the plurality of fixing units are arranged at intervals on the supporting frame to lock the plurality of transported goods.

[0020] It can be seen from the above technical solutions that the present invention has at least the following advantages and positive effects:

[0021] In the present invention, the rotating assembly has a first position and a second position relative to the support frame. During the loading and unloading process, the rotating assembly can be adjusted to the first position, and the first limiting assembly is folded relative to the support frame and will not interfere with the loading and unloading process. After the loading and unloading process is completed, the rotating assembly is adjusted to the second position, and the first limiting assembly is unfolded relative to the support frame and abuts against the transported goods. The first limiting assembly and the second limiting assembly jointly lock the transported goods on the support frame. By switching the first position and the second position of the rotating assembly, the loading and unloading of the transported goods is facilitated, and the efficiency of loading and unloading of the transported goods is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a locking device in an embodiment of the present invention.

[0023] Figure 2 2 is a schematic structural diagram of a support frame in an embodiment of the present invention.

[0024] Figure 3 It is a structural schematic diagram of the first limiting component and the rotating component in an embodiment of the present invention.

[0025] Figure 4 3 is a schematic structural diagram of the rotating assembly in the first position in an embodiment of the present invention.

[0026] Figure 5 It is a schematic structural diagram of the first support beam in an embodiment of the present invention.

[0027] Figure 6 3 is a structural schematic diagram of the rotating assembly in the second position in an embodiment of the present invention.

[0028] Figure 7 2 is a schematic structural diagram of the first rotating member in an embodiment of the present invention.

[0029] Figure 8 2 is a schematic structural diagram of the first position-limiting member in an embodiment of the present invention.

[0030] Figure 9 2 is a schematic structural diagram of the second position-limiting member in an embodiment of the present invention.

[0031] Figure 10 2 is a schematic structural diagram of a guide cylinder in an embodiment of the present invention.

[0032] The following are the descriptions of the reference numerals:

[0033] 100, support frame; 110, first support beam; 111, second mounting hole; 112, third mounting hole; 120, second support beam; 130, third support beam; 140, fourth support beam; 150, fifth support beam;

[0034] 200, first limit assembly;

[0035] 300, rotating assembly; 310, first rotating member; 311, first mounting hole; 312, first sliding groove; 313, first plate; 314, second plate; 320, first fastener; 330, second fastener; 340, second rotating member; 350, connecting pipe;

[0036] 400, second limiting assembly; 410, first limiting member; 420, third rotating member; 430, third fastening member; 440, second limiting member; 450, latch; 451, raised portion; 460, guide cylinder; 461, third sliding groove; 462, fourth sliding groove; 470, third limiting member; 480, fourth limiting member; 490, fifth limiting member. DETAILED DESCRIPTION

[0037] Typical embodiments embodying the features and advantages of the present invention are described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations herein are intended to be illustrative rather than limiting.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0039] like Figure 1 and Figure 2 As shown, in one embodiment, a locking device includes a support frame 100, a first limiting assembly 200, a rotating assembly 300 and a second limiting assembly 400, the first limiting assembly 200 and the second limiting assembly 400 jointly lock the transported goods on the support frame 100, Figure 2 All structures shown are support frame 100, which includes a first support beam 110, a second support beam 120, a third support beam 130, a fourth support beam 140, and a fifth support beam 150. The support frame 100, the first limiting assembly 200, and the second limiting assembly 400 can be made of metal materials to ensure sufficient strength and rigidity. A buffer structure is provided where the first limiting assembly 200 and the second limiting assembly 400 come into contact with the transported cargo to prevent the first limiting assembly 200 and the second limiting assembly 400 from damaging the transported cargo during transportation. Specifically, the buffer structure can be made of polyurethane.

[0040] During transportation, multiple transport goods with the same structure need to be transported. Based on this, the first limiting assembly 200, the rotating assembly 300 and the second limiting assembly 400 form a fixed unit, and the fixed unit is provided in plurality, and the plurality of fixed units are spaced apart on the support frame 100 to lock multiple transport goods. Specifically, the transported goods may be an engine, and the engine has a flywheel and a cooling pipe bracket. The engine is an irregularly shaped object, and is more likely to shake and deflect during transportation. In addition, there is a flywheel on one side of the engine, and the flywheel is similar to a circular roller, which is prone to rolling under the action of external force. Therefore, a specific locking device is required to lock the engine during transportation. As Figure 1 As shown, the locking device can lock three engines.

[0041] In this embodiment, the first limiting component 200 is connected to the rotating component 300, and the rotating component 300 is provided with a first mounting hole 311 and a first sliding groove 312. The rotating component 300 has a first position and a second position relative to the support frame 100. When the rotating component 300 is in the first position, the first limiting component 200 is folded relative to the support frame 100, that is, the first limiting component 200 is arranged in the horizontal direction, and the rotating component can rotate relative to the support frame 100 with the first sliding groove 312 as the rotation axis, and can slide relative to the support frame 100 along the first sliding groove 312. The rotating component 300 can be fixed to the support frame 100 through the first sliding groove 312 and the first mounting hole 311, so that the rotating component 30 0 switches from the first position to the second position. When the rotating assembly 300 is in the second position, the first limiting assembly 200 is deployed relative to the support frame 100. That is, the first limiting assembly 200 is arranged in the vertical direction and abuts against the transported goods, so that the first limiting assembly 200 limits the first degree of freedom of the transported goods. The rotating assembly 300 can rotate relative to the support frame 100 to switch between the first position and the second position. The second limiting assembly 400 is arranged on the support frame 100 and abuts against the transported goods to limit the second degree of freedom of the transported goods, thereby allowing the first limiting assembly 200 and the second limiting assembly 400 to jointly lock the transported goods to the support frame 100. Specifically, the rotating assembly 300 is fixed to the first support beam 110 via the first sliding slot 312 and the first mounting hole 311.

[0042] During the loading and unloading process of transported goods, the rotating assembly 300 can be adjusted to the first position, such as Figure 4 As shown, the first limit assembly 200 is set in the horizontal direction and does not interfere with the loading and unloading process. After the loading and unloading process of the transported goods is completed, the rotating assembly 300 is adjusted to the second position, as shown in FIG. Figure 6As shown, the first stopper assembly 200 is arranged in a vertical direction and abuts against the transported goods. The first stopper assembly 200 and the second stopper assembly 400 jointly lock the transported goods on the support frame 100. By switching the first position and the second position of the rotating assembly 300, the loading and unloading of the transported goods is facilitated, and the efficiency of loading and unloading of the transported goods is improved. Furthermore, through the first mounting hole 311 and the first sliding groove 312, the rotating assembly 300 can be stably rotated relative to the support frame 100 and stably fixed to the support frame 100.

[0043] It should be noted that the limiting portion of the first limiting assembly 200 is a U-shaped groove. The vertically arranged U-shaped groove can limit the freedom of movement of the transported cargo in the Z-axis direction, that is, the first degree of freedom is the degree of freedom of movement in the Z-axis. The second limiting assembly 400 can limit the freedom of movement of the transported cargo in the X-axis and Y-axis directions, that is, the second degree of freedom is the degree of freedom of movement in the X-axis and Y-axis directions. The first limiting assembly 200 and the second limiting assembly 400 can jointly lock the transported cargo.

[0044] For details, please refer to Figures 3 to 7The rotating assembly 300 includes a first rotating member 310, a first fastening member 320, and a second fastening member 330. The first rotating member 310 is connected to the first limiting assembly 200. A first mounting hole 311 and a first sliding groove 312 are provided on the first rotating member 310. The support frame 100 is provided with a second mounting hole 111 and a third mounting hole 112. The first mounting hole 311, the second mounting hole 111, and the third mounting hole 112 are all circular holes. The diameters of the first mounting hole 311, the second mounting hole 111, the third mounting hole 112, and the width of the first sliding groove 312 are all equal. The first rotating member 310 has a third position and a fourth position relative to the support frame 100. The first rotating member 310 can rotate relative to the support frame 100 about the first fastening member 320 to switch between the third and fourth positions. When the first rotating member 310 is in the third position, the first limiting assembly 200 is folded relative to the support frame 100, that is, the first limiting assembly 200 is arranged horizontally, and the first fastener 320 is arranged at one end of the first sliding groove 312 and inserted into the first mounting hole 311 and the second mounting hole 111. When the first rotating member 310 is in the fourth position, the first limiting assembly 200 is unfolded relative to the support frame 100, that is, the first limiting assembly 200 is arranged vertically, the second fastener 330 is inserted into the third mounting hole 112, and the first fastener 320 moves to the other end of the first sliding groove 312. More specifically, the first fastener 320 can be, but is not limited to, a bolt. The second fastener 330 can be, but is not limited to, a spring pin. Furthermore, the locking device also includes a connecting tube 350, one end of which is welded to the first limiting assembly 200 and the other end is welded to the first rotating member 310. The second mounting hole 111 and the third mounting hole 112 are both provided on the first support beam 110 .

[0045] During operation, the first rotating member 310 is in the third position relative to the support frame 100, and the first limiting component 200 is arranged in the horizontal direction, that is, the first limiting component 200 is close to the support frame 100, and the transported goods are placed on the first limiting component 200 and the second limiting component 400, and the first rotating member 310 is rotated at an angle of 90° so that the first rotating member 310 is in the fourth position, and the first limiting component 200 is arranged in the vertical direction. There is a distance between the first limiting component 200 and the transported goods, that is, the first limiting component 200 cannot directly abut against the transported goods. The rotating assembly 300 and the first limiting assembly 200 are pushed horizontally toward the direction close to the transported goods so that the first limiting assembly 200 abuts against the transported goods. During this movement, the first fastener 320 moves from one end of the first sliding groove 312 to the other end, and the first mounting hole 311 coincides with the third mounting hole 112. When the first limiting assembly 200 abuts against the transported goods, the first fastener 320 and the second fastener 330 jointly fix the first rotating member 310 on the support frame 100.

[0046] Further, please refer to Figure 4 The first rotating member 310 includes a first plate body 313 and a second plate body 314. One end of the first plate body 313 is connected to the first limiting assembly 200, and the other end is connected to the second plate body 314. The first mounting hole 311 is set on the first plate body 313, and the first sliding groove 312 is set on the second plate body 314. The second plate body 314 is set perpendicular to the first plate body 313, that is, the extension direction of the first sliding groove 312 is perpendicular to the length direction of the first plate body 313.

[0047] In this embodiment, please refer to Figure 3 The rotating assembly 300 further includes a second rotating member 340, which is connected to an end of the first position-limiting assembly 200 away from the first rotating member 310. The second rotating member 340 defines a second sliding groove, which is disposed opposite the first sliding groove 312, and the first fastener 320 is disposed within the second sliding groove. The provision of the second rotating member 340 ensures that the first position-limiting assembly 200 rotates more smoothly relative to the support frame 100 and is more stably fixed to the support frame 100. Specifically, the first rotating member 310 and the second rotating member 340 are parallel, and the first position-limiting assembly 200 is disposed between the first rotating member 310 and the second rotating member 340.

[0048] In this embodiment, please refer to Figure 8 The second limiting assembly 400 includes a first limiting member 410, a third rotating member 420, and a third fastening member 430. The first limiting member 410 is disposed on the support frame 100 and abuts against the transported cargo. The third rotating member 420 is rotatably connected to the first limiting member 410. The third rotating member 420 defines a fourth mounting hole. The third fastening member 430 is disposed within the fourth mounting hole and extends into the limiting hole of the transported cargo. Specifically, the third fastening member 430 can be, but is not limited to, a spring pin. More specifically, the first limiting member 410 is disposed on the third support beam 130.

[0049] When loading and unloading the transported goods, the third rotating member 420 is rotated, and the third rotating member 420 drives the third fastening member 430 away from the first limiting member 410 to prevent the third fastening member 430 from interfering with the loading and unloading of the transported goods. When the transported goods need to be limited, the third rotating member 420 is rotated again, and the third rotating member 420 drives the third fastening member 430 close to the first limiting member 410, so that the third fastening member 430 limits the transported goods.

[0050] Specifically, the limiting portion of the first limiting member 410 is L-shaped, and the first limiting member 410 and the first limiting assembly 200 are both oriented in the X-axis direction. The first limiting assembly 200 limits the leftward movement of the transported cargo in the X-axis, while the first limiting member 410 limits the rightward movement of the transported cargo in the X-axis. Together, the first limiting assembly 200 and the first limiting member 410 limit the freedom of movement of the transported cargo in the X-axis direction. The third fastener 430 is disposed within the fourth mounting hole and extends into the limiting hole of the transported cargo. The third fastener 430 is capable of limiting the freedom of movement of the transported cargo in the Z-axis direction.

[0051] More specifically, the third rotating member 420 includes a third plate and a fourth plate. One end of the third plate is connected to the first limit member 410, and the other end is connected to the fourth plate. The third fastener 430 is arranged on the fourth plate, and the third plate is arranged vertically to the fourth plate.

[0052] In this embodiment, please refer to Figure 9 and Figure 10 The second limiting assembly 400 further includes a second limiting member 440, a latch 450, and a guide cylinder 460. The second limiting member 440 is disposed on the support frame 100 and is disposed on the side of the second limiting member 440. The latch 450 is slidably disposed within the guide cylinder 460 and partially extends above the second limiting member 440. The second limiting member 440 and the latch 450 form a limiting space, into which the transported goods partially extend and are confined. The limiting space can limit the freedom of movement of the transported goods in the Z-axis direction. The second limiting member 440 and the first limiting member 410 are both in the Y-axis direction. The first limiting member 410 can limit the movement of the transported goods in the rearward direction of the Y-axis. The latch 450 and the second limiting member 440 form a limiting space that can limit the movement of the transported goods in the forward direction of the Y-axis. Together, they limit the freedom of movement of the transported goods in the Y-axis direction. Specifically, the second limiting member 440 is disposed on the fourth support beam 140.

[0053] Specifically, the guide cylinder 460 defines a third sliding groove 461, which is positioned toward the second stopper 440. A protrusion 451 is provided on the end of the latch 450 facing away from the second stopper 440. The protrusion 451 is capable of sliding within the third sliding groove 461. More specifically, the second stopper assembly 400 further includes an elastic member that is sleeved around the outer periphery of the latch 450 and abuts against the side of the second stopper 440 facing the guide cylinder 460. The elastic member is configured to provide an elastic force to pull the latch 450 away from the second stopper 440. The guide cylinder 460 defines a fourth sliding groove 462, in which the protrusion 451 is capable of sliding. The fourth sliding groove 462 extends at an angle to the third sliding groove 461. Specifically, the third sliding groove 461 extends perpendicularly to the fourth sliding groove 462. The elastic member may be, but is not limited to, a spring.

[0054] During operation, when it is necessary to limit the position of transported goods, the protrusion 451 is pushed along the third sliding groove 461 in a direction close to the second limiting member 440, driving the latch 450 to move synchronously, moving the latch 450 into the fourth sliding groove 462, so that part of the latch 450 structure can be fixed above the second limiting member 440. During this process, the elastic member is compressed and provides an elastic force to the latch 450 away from the second limiting member 440. When it is necessary to load or unload the transported goods, the latch 450 is pushed into the third sliding groove 461, and the latch 450 is automatically reset under the action of the elastic member.

[0055] In this embodiment, the second limiting assembly 400 further includes a third limiting member 470 . The third limiting member 470 is an arc-shaped structure capable of limiting the movement of the transported goods in the X-axis direction. The third limiting member 470 is disposed on the third support beam 130 .

[0056] Furthermore, the second limiting assembly 400 also includes a fourth limiting member 480 and a fifth limiting member 490. The fourth limiting member 480 is a plate-like structure inclined toward the Y-axis direction, which can limit the forward movement of the transported goods along the Y-axis, and the fifth limiting member 490 can limit the backward movement of the transported goods along the Y-axis. Specifically, the first limiting assembly 200, the rotating assembly 300, the first limiting member 410, the second limiting member 440, the third limiting member 470, the fourth limiting member 480, and the fifth limiting member 490 form a fixed unit. Please refer to Figure 2 The first stopper assembly 410, the rotating assembly 300, and the fourth stopper 480 are located in the upper left position, the first stopper 410 is located in the upper right position, the fifth stopper 490 is located in the lower left position, the second stopper 440 is located in the lower right position, and the third stopper 470 is located in the middle position. Specifically, the fourth stopper 480 is provided on the second support beam 120, and the fifth stopper 490 is provided on the fifth support beam 150.

[0057] Specifically, the first and second stoppers 410 and 440 are positioned at the bottom of the flywheel, and the third stopper 470 is positioned at the bottom of the cooling pipe bracket. The first stopper assembly 200, the first stopper 410, the second stopper 440, the third stopper 470, the fourth stopper 480, and the fifth stopper 490 are all specifically configured based on the shape of the engine. The first stopper assembly 200, the first stopper 410, the second stopper 440, the third stopper 470, the fourth stopper 480, and the fifth stopper 490 work together to lock the engine.

[0058] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are intended to be illustrative and exemplary rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. All changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A locking device for locking transported goods, characterized in that: include: Support frame; a first limiting component; and a second limiting assembly, wherein the second limiting assembly is arranged on the support frame, the second limiting assembly is engaged with the transported goods, and the second limiting assembly is engaged with the transported goods to limit the second degree of freedom of the transported goods, thereby enabling the first limiting assembly and the second limiting assembly to jointly lock the transported goods to the support frame; The rotating assembly includes a first rotating member, a first fastening member, and a second fastening member. The first rotating member is connected to the first limiting assembly. The first mounting hole and the first sliding groove are provided on the first rotating member. The support frame is provided with a second mounting hole and a third mounting hole. The first rotating member has a third position and a fourth position relative to the support frame, and the first rotating member can rotate relative to the support frame around the first fastener so that the first rotating member switches between the third position and the fourth position; when the first rotating member is in the third position, the first limiting assembly is folded relative to the support frame, and the first fastener is provided at one end of the first sliding slot and passes through the first mounting hole and the second mounting hole; when the first rotating member is in the fourth position, the first limiting assembly is unfolded relative to the support frame, the second fastener passes through the third mounting hole, and the first fastener is provided at the other end of the first sliding slot; The second limiting component includes a first limiting member, a third rotating member and a third fastener. The first limiting member is arranged on the support frame, the first limiting member abuts against the transported goods, the third rotating member is rotatably connected to the first limiting member, and the third rotating member is provided with a fourth mounting hole. The third fastener is passed through the fourth mounting hole and extends into the limiting hole of the transported goods.

2. The locking device according to claim 1, characterized in that: The first rotating member includes a first plate and a second plate. One end of the first plate is connected to the first limiting assembly, and the other end is connected to the second plate. The first mounting hole is set in the first plate, and the first sliding groove is set in the second plate.

3. The locking device according to claim 1, characterized in that: The rotating assembly also includes a second rotating member, which is connected to an end of the first limiting assembly away from the first rotating member. The second rotating member is provided with a second sliding groove, the second sliding groove and the first sliding groove are arranged opposite to each other, and the first fastener is passed through the second sliding groove.

4. The locking device according to claim 1, characterized in that: The third rotating member includes a third plate and a fourth plate. One end of the third plate is connected to the first limiting member, and the other end is connected to the fourth plate. The third fastener is provided on the fourth plate.

5. The locking device according to claim 1, characterized in that: The second limiting component also includes a second limiting member, a latch and a guide cylinder. The second limiting member is arranged on the support frame, and the guide cylinder is arranged on the side of the second limiting member. The latch is slidably arranged in the guide cylinder and partially extends above the second limiting member. The second limiting member and the latch form a limiting space to limit the transported goods.

6. The locking device according to claim 5, characterized in that: The guide cylinder is provided with a third sliding groove, which is arranged in the direction of the second limiting member. The end of the latch away from the second limiting member is provided with a protrusion, which can slide in the third sliding groove.

7. The locking device according to claim 6, characterized in that: The second limiting assembly also includes an elastic member, which is sleeved on the outer circumference of the pin and abuts against the side of the second limiting member facing the guide cylinder. The elastic member is used to provide an elastic force to the pin away from the second limiting member. The guide cylinder is provided with a fourth sliding groove, and the protrusion can slide in the fourth sliding groove. The extension direction of the fourth sliding groove and the extension direction of the third sliding groove form an angle.

8. The locking device according to claim 1, characterized in that: The first limiting assembly, the rotating assembly and the second limiting assembly form a fixing unit, and the fixing unit is provided in plurality. The plurality of fixing units are arranged at intervals on the supporting frame to lock the plurality of transported goods.

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