Door assembly, carrying and transporting lift cage, and goods lifting device

Abstract

A door assembly, a carrying and transporting lift cage, and a goods lifting device. The door assembly comprises a door (11) and a linkage mechanism, wherein the door (11) is rotatably mounted to a carrying and transporting body; the linkage mechanism comprises a driving component (12) and a driven component (13), and the driving component (12) is rotatably arranged on the carrying and transporting body; the driven component (13) is separately connected to the driving component (12) and the door (11); when the driving component (12) rotates relative to the carrying and transporting body, the driving component (12) drives the driven component (13) to move so as to open or close the door (11). According to the door assembly, the door (11) is indirectly opened or closed by means of the linkage mechanism, such that the operation is safer and more reliable. In addition, the driving component (12) in the linkage mechanism is adapted to be locked to the carrying and transporting body, and then the door (11) will not be accidentally opened or closed due to erroneous operation such as impact, such that the safety is high.

Description

Door assemblies, carrier bodies and cargo lifting equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202310975376.3, filed on August 3, 2023, entitled “Door assembly, carrier body and cargo lifting equipment,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present invention relates to the technical field of lifting equipment, and in particular to a door assembly, a carrier body and cargo lifting equipment. Background Art

[0004] Freight lifts are the primary means of transporting loads vertically. The definition of freight lifts is broad, and construction platforms also fall under this category. Freight lifts consist of a carrying mechanism, drive mechanism, standard sections, underframe, bucket, and electrical system. They are commonly used in industrial production for transporting people and cargo.

[0005] Due to their high safety, cargo lifts can be used on construction sites, in production workshops, or in logistics facilities. Freight lifts typically have a load capacity of 0.3 to 5 tons and operate at speeds ranging from 1 to 60 m / min.

[0006] In related technologies, the door assembly of cargo lifts operates directly on the door body when opening or closing. Because the door body rotates relative to the carrier, this method of opening or closing the door presents certain safety risks. Furthermore, the door body is prone to accidental opening or closing due to misoperation, such as impact, thus compromising safety.

[0007] Summary of the Invention

[0008] A first aspect of the present invention provides a door assembly that addresses the aforementioned technical deficiencies of the prior art. By indirectly opening or closing the door through a linkage mechanism, the door is made safer and more reliable. Furthermore, the active component of the linkage mechanism is adapted to lock to the carrier body, preventing the door from accidentally opening or closing due to impact or other misoperation, thereby enhancing safety.

[0009] A second aspect of the present invention provides a carrier body.

[0010] A third aspect of the present invention provides a cargo lifting device.

[0011] The present invention provides a door assembly, comprising:

[0012] a door body rotatably mounted to the carrier body;

[0013] The linkage mechanism includes an active component and a passive component, wherein the active component is rotatably arranged on the carrier body; the passive component is respectively connected to the active component and the door body;

[0014] When the active component moves relative to the carrying body, the active component drives the passive component to move, so as to open or close the door body.

[0015] According to a door assembly provided by the present invention, the active component includes an active rod body and a connecting portion connected to each other;

[0016] The connecting portion is provided with a first mounting position and a second mounting position at intervals, the first mounting position is used for rotationally connecting with the carrying body, and the second mounting position is used for connecting with the passive component; when the active component moves, the passive component moves around the center of the first mounting position.

[0017] According to a door assembly provided by the present invention, the first mounting position is provided with a bearing seat, the bearing seat is provided with a rotating shaft, and the rotating shaft is rotatably matched with the carrying body.

[0018] According to a door assembly provided by the present invention, the passive component includes a passive rod body, a first end of the passive rod body is connected to the active component, and a second end of the passive rod body is connected to the door body.

[0019] According to a door assembly provided by the present invention, the first end of the passive rod body is connected to the active component via a first universal joint;

[0020] and / or

[0021] The second end of the passive rod is connected to the door body through a second universal joint.

[0022] According to a door assembly provided by the present invention, the passive rod body includes a first adjustment rod and a second adjustment rod connected to each other;

[0023] The first adjusting rod is connected to the active component, and the second adjusting rod is connected to the door body; the distance between the first adjusting rod and the second adjusting rod is suitable for adjustment.

[0024] According to a door assembly provided by the present invention, the passive rod body further includes an adjusting member;

[0025] The adjusting member is threadedly connected to the first adjusting rod and the second adjusting rod respectively, and the threads of the first adjusting rod and the second adjusting rod have opposite rotation directions.

[0026] According to a door assembly provided by the present invention, the passive rod body also includes a connecting arm, the connecting arm is provided with a first mounting hole and a second mounting hole at intervals, the door body is connected to the first mounting hole, and the passive rod body is connected to the second mounting hole; when the active component moves, the passive component moves around the virtual center of the first mounting hole.

[0027] According to a door assembly provided by the present invention, the passive component further includes an elastic member;

[0028] The elastic member is connected to the carrier body and the passive rod body respectively; or

[0029] The elastic members are connected to the carrying body and the door body respectively.

[0030] According to a door assembly provided by the present invention, the carrier body is provided with a locking mechanism, and when the door body is closed, the locking mechanism locks the door body to the carrier body.

[0031] According to a door assembly provided by the present invention, the locking mechanism includes a fixing seat, a lock hook and a handle, the fixing seat is mounted to the carrying body, the lock hook is rotatably connected to the fixing seat, and the handle is connected to the lock hook.

[0032] According to a door assembly provided by the present invention, the locking mechanism further includes a limiting member, which is provided on the fixing seat and is located on the movement path of the locking hook.

[0033] According to a door assembly provided by the present invention, a support mechanism is provided between the door body and the carrier body, and the support mechanism is adapted to switch between an expanded state and a closed state;

[0034] In the deployed state, the door is open;

[0035] In the closed state, the door body is closed.

[0036] According to a door assembly provided by the present invention, the support mechanism includes a first connecting rod and a second connecting rod that are rotatably connected, the first connecting rod is rotatably connected to the door body, and the second connecting rod is connected to the carrying body.

[0037] According to a door assembly provided by the present invention, the support mechanism further includes at least one third connecting rod;

[0038] The third connecting rod is rotatably connected to the first connecting rod and the carrying body respectively. When the door body is opened, the third connecting rod is parallel to the second connecting rod.

[0039] A second aspect of the present invention provides a carrier body, comprising a carrier body and any one of the door assemblies described above, wherein the carrier body is provided with an opening, and the door assembly is provided at the opening to open or close the opening.

[0040] A third aspect of the present invention provides a cargo lifting device comprising a guide rail frame and the above-mentioned carrier body;

[0041] The guide rail frame is provided with a rack, and the carrier body is in transmission cooperation with the rack and in guiding cooperation with the guide rail frame.

[0042] One or more of the above embodiments of the present invention have at least the following beneficial effects:

[0043] The door assembly provided by the present invention utilizes a linkage mechanism between the door and the carrier, allowing the door to be opened or closed indirectly through the linkage mechanism, resulting in safer and more reliable operation. Furthermore, the active component of the linkage mechanism is adapted to lock to the carrier, preventing the door from accidentally opening or closing due to malfunctions such as impact, thereby enhancing safety.

[0044] When the door assembly is applied to the carrier body of a cargo lifting device, the safety of the cargo lifting device can be improved, potential safety hazards can be reduced, and the failure rate of the cargo lifting device can be reduced. Specifically, the linkage mechanism includes an active component and a passive component. The active component is rotated so that the active component drives the passive component to move, thereby opening or closing the door body. The action of closing and opening the door requires applying force to the active component, which is then transmitted from the active component to the passive component. The passive component indirectly controls the opening or closing of the door body, which is highly safe and labor-saving to operate. In addition, since the active component is suitable for locking to the carrier body, the active component will not be misoperated due to collision or other operations to accidentally open or close the door body, which provides high safety.

[0045] The carrier provided by the present invention has all the advantages mentioned above because it includes the door assembly. The cargo lifting device provided by the present invention has all the advantages mentioned above because it includes the carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] FIG1 is a schematic structural diagram of a cargo lifting device provided by an embodiment of the present invention;

[0048] FIG2 is a schematic structural diagram of a carrier body in a cargo lifting device provided by an embodiment of the present invention (the door assembly is in an open state);

[0049] FIG3 is a schematic structural diagram of a carrier body in a cargo lifting device provided by an embodiment of the present invention (the door assembly is in a closed state);

[0050] FIG4 is a schematic structural diagram of a door assembly of a carrier body in a cargo lifting device provided in an embodiment of the present invention;

[0051] FIG5 is a schematic structural diagram of components of a door assembly of a carrier body in a cargo lifting device provided in an embodiment of the present invention;

[0052] FIG6 is a schematic structural diagram of a locking mechanism in a cargo lifting device provided in an embodiment of the present invention;

[0053] FIG7 is a schematic diagram of a partial structure of a door assembly of a cargo lifting device provided in an embodiment of the present invention;

[0054] FIG8 is an enlarged view of portion A in FIG7 ;

[0055] FIG9 is a side view of the partial structure of the door assembly of the cargo lifting equipment provided in an embodiment of the present invention.

[0056] Figure numerals: 10, door assembly; 11, door body; 12, active component; 121, active rod body; 122, connecting portion; 1221, first mounting position; 1222, second mounting position; 1223, bearing seat; 13, passive component; 131, passive rod body; 1311, first adjusting rod; 1312, second adjusting rod; 1313, adjusting member; 132, first universal joint; 133, second universal joint; 134, connecting arm; 1341, first mounting hole; 1342, second mounting hole; 1343, extension arm ; 135. Elastic member; 16. Locking mechanism; 161. Fixed seat; 1611. First fixed plate; 1612. Second fixed plate; 162. Lock hook; 1621. Lock body; 1622. Hook body; 163. Handle; 1631. Handle shaft; 1632. Handle body; 164. Lock shaft; 165. Limiting member; 17. Support mechanism; 171. First connecting rod; 172. Second connecting rod; 173. Third connecting rod; 20. Carrying body; 30. Driving device; 40. Guide member; 50. Electric control box; 100. Carrying body; 200. Guide rail frame; 300. Rack; 400. Attachment frame; 500. Base frame; 600. Cable reel. DETAILED DESCRIPTION

[0057] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0058] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0059] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0061] Figure 1 is a schematic structural diagram of the cargo lifting equipment provided in an embodiment of the present invention; Figure 2 is a schematic structural diagram of the carrier body 100 in the cargo lifting equipment provided in an embodiment of the present invention (the door assembly 10 is in an open state); Figure 3 is a schematic structural diagram of the carrier body 100 in the cargo lifting equipment provided in an embodiment of the present invention (the door assembly 10 is in a closed state).

[0062] Referring to Figures 1 to 3 , an embodiment of the present invention provides a cargo lift comprising a carrier body 100 and a guide rail frame 200 , which serves as the running track for the carrier body 100. The guide rail frame 200 is composed of standard sections welded together using high-strength bolts. The standard sections are constructed from seamless steel pipes, angle steel, steel tubes, and other materials. A rack 300 is mounted on the guide rail frame 200 and secured with multiple hexagon socket head cap screws, allowing for detachable connection and convenient replacement.

[0063] The guide rail frame 200 is provided with a plurality of attachment brackets 400 spaced apart along the height direction, and the guide rail frame 200 is connected to the building via the attachment brackets 400. A base frame 500 is provided at the bottom of the guide rail frame 200, and the guide rail frame 200 is positioned on the ground via the base frame 500. During installation, the base frame 500 is anchored to the concrete foundation of the carrier body 100 via anchor bolts.

[0064] The guide rail frame 200 is also equipped with a cable drum 600 and a cable arm (not shown). The cable drum 600 is used to retract and release the main cable. When the carrier body 100 moves upward, it drives the main cable inside the cable drum 600 upward. When the carrier body 100 moves downward, the main cable is slowly retracted into the cable drum 600, preventing it from being scattered on the ground and damaged, which could cause danger. The cable arm is a device that pulls the main cable up and down. With the cable arm pulling the main cable, it can safely pass through the cable guard, preventing the cable from being scratched and causing accidents.

[0065] 1 , specifically, the carrier body 100 includes a carrier body 20 , a driving device 30 , a guide member 40 (guide roller) and an electric control box 50 . The driving device 30 , the guide member 40 and the electric control box 50 are all disposed on the carrier body 20 .

[0066] The drive device 30 comprises an electric motor, a reducer, a coupling, a drive gear, and a brake. The motor is a three-phase asynchronous motor with a disc brake for lifting, and the reducer is a dry surface enveloping toroidal worm reducer. It features a compact structure, high load-bearing capacity, high mechanical efficiency, long service life, and stable operation. The coupling is a claw-type coupling, with a rubber buffer between the two couplings to reduce impact and vibration during operation. The drive gear meshes with the rack 300, transmitting the driving force generated by the motor to the carrier body 20, enabling it to move up and down. The brake's electromagnet automatically tracks the wear of the brake disc, and the braking torque is adjustable.

[0067] The electric control box 50 is the mechanical command part of the carrier body 100 , and all actions of the carrier body 100 are commanded by the electrical system in the electric control box 50 .

[0068] The carrier body 20 includes a frame and a limit device arranged on the frame. The limit device ensures that after the carrier body 20 reaches the upper and lower limit positions, if it continues to run due to a limit switch failure, the main power supply is immediately cut off to stop the carrier body 20, ensuring that the carrier body 20 does not hit the top when running upward or hit the bottom when running downward.

[0069] Among them, the limit device includes an upper stroke limit bumper, a lower stroke limit bumper, an upper stroke limit bumper, and a lower stroke limit bumper. The upper and lower stroke limit bumpers of the carrying body 20 ensure that when the carrying body 20 runs to the upper and lower specified positions, the power supply is automatically cut off to stop the lifting equipment, and it can only be reset through manual operation.

[0070] The carrier body 20 can be a cage, welded from sections of steel, braided steel wire, and steel plates. A roof is located on top of the carrier body 20, with an opening between the roof and the carrier body 20. The opening of the carrier body 20 is equipped with a flip door. An electrical interlock is installed on the carrier body 20, which stops the carrier body 20 when the flip door is opened, ensuring the safety of the load (cargo or personnel) inside the carrier body 20.

[0071] Figure 2 shows a schematic structural diagram of the carrier body 100 in the cargo lifting equipment provided in an embodiment of the present invention (the door assembly 10 is in an open state); Figure 3 shows a schematic structural diagram of the carrier body 100 in the cargo lifting equipment provided in an embodiment of the present invention (the door assembly 10 is in a closed state).

[0072] 2 and 3 , the door assembly 10 provided by an embodiment of the present invention will be described in detail below, taking its application on a carrier body 100 of a cargo lift as an example. In addition to being applicable to cargo lifts, the door assembly 10 can also be applied to other equipment.

[0073] The door assembly 10 provided in the embodiment of the present invention includes a door body 11 and a linkage mechanism. The door body 11 is rotatably mounted on the carrier body 20 , that is, the door body 11 is rotatable relative to the carrier body 20 to open and close the door body 11 .

[0074] The linkage mechanism includes an active component 12 and a passive component 13. The first end of the active component 12 is rotatably mounted on the carrier body 20. The second end of the active component 12 is free and can be freely moved. When the active component 12 is locked to the carrier body 20, the door body 11 is fully closed. The first end of the passive component 13 is connected to the first end of the active component 12, and the second end of the passive component 13 is connected to the door body 11. The active component 12 rotates relative to the carrier body to drive the passive component 13 to move, thereby opening or closing the door body 11.

[0075] 2 , if the active component 12 is lifted upward, the active component 12 rotates relative to the carrier body and drives the passive component 13 to move downward, thereby pushing the door body 11 to rotate around the door axis connected to the carrier body 20, so that the door body 11 rotates and opens relative to the carrier body 20.

[0076] Referring to Figure 3, if the active component 12 is pulled downward, the active component 12 rotates relative to the carrier body 20 and drives the passive component 13 to move upward, thereby pulling the door body 11 to rotate around the door axis connected to the carrier body 20, so that the door body 11 rotates and closes relative to the carrier body 20.

[0077] As will be appreciated, the door assembly 10 provided in this embodiment of the present invention utilizes a linkage mechanism between the door body 11 and the carrier 20, thereby indirectly opening and closing the door body 11 through the linkage mechanism, thereby providing a safer and more reliable operation. Furthermore, the active component 12 of the linkage mechanism is adapted to lock to the carrier, preventing the door body 11 from accidentally opening or closing due to malfunctions such as impact, thereby enhancing safety.

[0078] When the door assembly 10 is applied to the carrier body 100 of the cargo lifting equipment, the safety of the cargo lifting equipment can be improved, potential safety hazards can be reduced, and the failure rate of the cargo lifting equipment can be reduced. Specifically, the linkage mechanism includes an active component 12 and a passive component 13. The active component 12 is rotated so that the active component 12 drives the passive component 13 to move, thereby opening or closing the door body 11. The action of closing and opening the door requires applying force to the active component 12, which is then transmitted from the active component 12 to the passive component 13, and indirectly controlling the opening or closing of the door body 11 through the passive component 13. This has high safety and labor-saving operation. In addition, since the active component 12 is suitable for locking to the carrier body, the active component 12 will not be misoperated due to collision or other operations to accidentally open or close the door body, and thus has high safety.

[0079] Alternatively, the active component 12 can be a disc-shaped structure, with the passive component 13 connected to the disc surface of the active component 12. This means there is a certain distance between the connection point of the passive component 13 and the center of the disc-shaped active component 12. The disc-shaped active component 12 is locked to the carrier. When unlocked, the active component 12 rotates a certain angle, pushing the passive component 13 to indirectly control the opening or closing of the door 11.

[0080] Figure 4 is a schematic diagram of the structure of the door assembly 10 of the carrier body 100 in the cargo lift provided by an embodiment of the present invention. Figure 5 is a schematic diagram of the structure of the components of the door assembly 10 of the carrier body 100 in the cargo lift provided by an embodiment of the present invention.

[0081] 4 and 5 , the active component 12 includes an active rod body 121 and a connecting portion 122 that are interconnected. A first mounting position 1221 and a second mounting position 1222 are provided on the connecting portion 122. A preset distance is provided between the first mounting position 1221 and the second mounting position 1222, that is, the first mounting position 1221 and the second mounting position 1222 will not overlap, and there is a certain distance between them; the first mounting position 1221 is used for rotational connection with the carrier body 20, and the second mounting position 1222 is used for connection with the passive component 13.

[0082] When force is applied to the active component 12, causing it to rotate about the axis of the first mounting position 1221, the passive component 13 performs a circular motion on a circle having a predetermined radius and a virtual center of the first mounting position 1221 as its center. Thus, the rotation of the active component 12 is converted into the displacement of the passive component 13, causing the passive component 13 to drive the door body 11 to move, thereby opening or closing the door body 11.

[0083] In the above process, by driving the active component 12 to rotate, the active component 12 drives the passive component 13 to move, and finally the passive component 13 drives the door body 11 to rotate. The two motion mechanisms need to move to complete the door opening or closing operation, which is safer and more labor-saving. It avoids directly acting on the door body 11 to open or close the door, which may cause accidents.

[0084] The first mounting position 1221 and the second mounting position 1222 can be understood as two positions provided on the connecting portion 122, and these two positions do not overlap, so as to ensure that the rotation of the active component 12 is converted into the displacement of the passive component 13. In other words, the first mounting position 1221 and the second mounting position 1222 can be connecting holes provided on the connecting portion 122.

[0085] The connecting portion 122 is a diamond-shaped, shaped component attached to the active rod body 121. The shape of this component must accommodate the first and second mounting locations 1221 and 1222, and meet the corresponding stiffness requirements. The connecting portion 122 can be integrally formed with the active rod body 121, effectively extending the length of the active rod body 121. The connecting portion 122 can also be manufactured as a separate component and then secured to the active rod body 121 by welding or using fasteners such as bolts and screws.

[0086] The length of the active rod body 121 can be adjusted according to usage needs. When the active rod body 121 needs to be set across the opening of the carrier body 20, it is equivalent to the first end of the active rod body 121 being rotatably connected to one side of the carrier body 20, and the second end of the active rod body 121 being set on the other side of the carrier body 20. At this time, the connecting part 122 can be a slender rod-shaped member.

[0087] When the active rod 121 is disposed on the opening side of the carrier body 20 , the active rod 121 is relatively short. In this case, the connecting portion 122 may be a bent piece, which locks the second end of the active rod 121 to the inner wall of the carrier body 20 by bending.

[0088] Continuing with Figures 4 and 5 , a bearing seat 1223 is provided at the first mounting position 1221 of the connecting portion 122. Bearing seat 1223 is provided with a rotating shaft, which is rotatably connected to the carrier body. This effectively means that the rotating shaft is indirectly mounted to the first mounting position 1221 of the connecting portion 122 via the bearing and bearing seat 1223. The bearing supports and rotates the rotating shaft, reducing the friction coefficient during the rotating shaft's movement, thereby increasing the service life of the rotating shaft and the connecting portion 122 and ensuring the rotating shaft's rotational accuracy.

[0089] Of course, a connecting hole can also be directly formed in the first mounting position 1221 of the connecting portion 122, and the rotating shaft can be directly inserted into the connecting hole and rotate within the connecting hole. In addition, the rotating shaft can also be integrally processed in the first mounting position 1221 of the connecting portion 122, and a mounting hole can be formed in the carrier body 20 at a position corresponding to the rotating shaft, so that the rotating shaft can pivot within the mounting hole. At the same time, a bearing can be installed in the mounting hole so that the rotating shaft is mounted in the mounting hole of the carrier body 20 via the bearing.

[0090] 4 , in some embodiments of the present invention, the passive component 13 includes a passive rod 131 , a first end of the passive rod 131 being rotatably connected to a first end of the active component 12 , and a second end of the passive rod 131 being rotatably connected to the door body 11 .

[0091] This means that a sufficiently large connection hole is provided in the connecting portion 122 to allow the first end of the passive rod 131 to connect therewith, with a certain clearance between the first end and the connection hole. A sufficiently large mounting hole is also provided in the door body 11 to allow a certain clearance between the mounting axis of the passive rod 131 and the mounting hole. Since the passive rod 131 deflects when it moves, a large clearance is provided at the mounting location to accommodate the deflection caused by the displacement of the passive rod 131. This prevents the displacement of the passive rod 131 from interfering with the corresponding mounting position, preventing it from effectively moving.

[0092] Continuing to refer to FIG4 , in some embodiments of the present invention, in order to make the operation of the passive rod body 131 more reliable, the passive rod body 131 can be arranged in any of the following ways:

[0093] The first way: the first end of the passive rod body 131 is connected to the first end of the active component 12 through the first universal joint 132 , and the second end of the passive rod body 131 is clearance-fitted with the door body 11 .

[0094] The second way: the first end of the passive rod body 131 is clearance-fitted with the first end of the active component 12 , and the second end of the passive rod body 131 is connected to the door body 11 through the second universal joint 133 .

[0095] The third method is as follows: the first end of the passive rod 131 is connected to the first end of the active component 12 via the first universal joint 132, and the second end of the passive rod 131 is connected to the door body 11 via the second universal joint 133. Since the universal joint can bear not only a certain torque but also a certain deflection, the passive rod 131 is connected to the active component 12 and the door body 11 via the universal joint, which makes the structure more compact and the operation more reliable.

[0096] Continuing to refer to Figure 4, the passive rod body 131 includes a first adjusting rod 1311 and a second adjusting rod 1312 connected to each other, the first adjusting rod 1311 is connected to the active component 12, and the second adjusting rod 1312 is connected to the door body 11; the distance between the first adjusting rod 1311 and the second adjusting rod 1312 is suitable for adjustment to shorten the length of the passive rod body 131, or to extend the length of the passive rod body 131, thereby adjusting the opening angle of the door body 11 to adapt to different application scenarios.

[0097] In some embodiments of the present invention, the passive rod body 131 further includes an adjusting member 1313 . The adjusting member 1313 is connected between the first adjusting rod 1311 and the second adjusting rod 1312 and is used to adjust the distance between the first adjusting rod 1311 and the second adjusting rod 1312 .

[0098] Specifically, the adjusting member 1313 can be an adjusting screw, and the first adjusting rod 1311 and the second adjusting rod 1312 are both screws. The adjusting member 1313 is threadedly connected to the first adjusting rod 1311 and the second adjusting rod 1312 respectively, and the threads of the first adjusting rod 1311 and the second adjusting rod 1312 are screwed in opposite directions.

[0099] By rotating the adjusting member 1313, the first adjusting rod 1311 and the second adjusting rod 1312 can be adjusted at the same time to approach each other, thereby shortening the length of the passive rod body 131, or by rotating the adjusting member 1313, the first adjusting rod 1311 and the second adjusting rod 1312 can be moved away from each other to extend the length of the passive rod body 131, thereby adjusting the opening angle of the door body 11 to adapt to different application scenarios.

[0100] In addition, one of the first adjusting rod 1311 and the second adjusting rod 1312 can be a sleeve, and the other can be a sleeve rod, the sleeve rod is sleeved in the sleeve, and a spring pin is provided on the sleeve rod, and a plurality of limiting holes are arranged in an array on the sleeve. The spring pin is used to cooperate with different limiting holes to limit the position, so as to realize the length adjustment of the passive rod body 131.

[0101] Of course, the passive rod 131 can also be a rigid rod, and the length of the passive rod 131 cannot be adjusted at will, that is, the opening angle of the door body 11 cannot be adaptively adjusted. The passive rod 131 can also be a hydraulic rod or a gas spring. The gas spring is also called a support rod, an angle adjuster, a gas pressure rod, or a damper. It can be suspended at will. The gas spring can extend a certain distance and provide a certain support and assistance for the door body 11 after opening or closing.

[0102] Continuing to refer to Figure 4, the passive rod body 131 also includes a connecting arm 134, which is arranged between the second end of the passive rod body 131 and the door body 11. The connecting arm 134 is provided with a first mounting hole 1341 and a second mounting hole 1342 at intervals, that is, a preset distance is provided between the first mounting hole 1341 and the second mounting hole 1342. The first mounting hole 1341 is used to connect to the door body 11, and the second mounting hole 1342 is used to connect to the passive rod body 131.

[0103] When force is applied to the active component 12, causing it to rotate, the first end of the passive component 13 performs a circular motion on a circle centered at the virtual center of the first mounting hole 1341 and with a predetermined distance as the radius. The second end of the passive component 13 performs a circular motion on a circle centered at the virtual center of the first mounting position 1221 and with a predetermined distance as the radius. In other words, the passive component 13 moves around the center of the first mounting position 1221. Therefore, the rotation of the active component 12 is converted into the displacement of the passive component 13, causing the passive component 13 to drive the door body 11 to open or close.

[0104] In the above process, by driving the active component 12 to rotate, the active component 12 drives the passive component 13 to move, and finally the passive component 13 drives the door body 11 to rotate. The two motion mechanisms need to move to complete the door opening or closing operation, which is safer and more labor-saving. It avoids directly acting on the door body 11 to open or close the door, which may cause accidents.

[0105] 4 , in some embodiments of the present invention, the passive component 13 further includes an elastic member 135, one end of which is connected to the carrier body, and the other end of which is connected to the passive rod 131 or the door body 11. The elastic member 135 may be a spring, a torsion spring, or other component that has a certain degree of elastic deformation and can recover the elastic deformation.

[0106] When force is applied to the active component 12, causing it to rotate, the first end of the passive component 13 performs a circular motion about a circle with a predetermined radius and a virtual center of the first mounting position 1221 as its center. The second end of the passive component 13 also performs a circular motion about a circle with a predetermined radius and a virtual center of the first mounting hole 1341 as its center. Thus, the rotation of the active component 12 is converted into displacement of the passive component 13, and the elastic member 135 is stretched, allowing the elastic member 135 to recover its elastic deformation.

[0107] When force is applied to the active component 12 to rotate the active component 12 , when the door body 11 is closed, the elastic member 135 recovers its elastic deformation, providing assistance for closing the door body 11 so that the door body 11 can be easily closed.

[0108] Among them, the connecting arm 134 can be a connecting rod-shaped structure, and the first mounting hole 1341 and the second mounting hole 1342 are respectively arranged near the two ends of the connecting arm 134. At this time, the elastic member 135 can be coaxially arranged with the passive component 13 on the side wall of the door body 11.

[0109] Referring to FIG. 4 , in some embodiments of the present invention, connecting arm 134 extends outward from the side wall to form extension arm 1343, so that the cross-section of connecting arm 134 is T-shaped. A positioning shaft (not numbered in the figure) is provided on extension arm 1343, and elastic member 135 is connected to the positioning shaft. This arrangement of connecting arm 134 not only satisfies the installation requirements of door body 11, passive component 13, and elastic member 135, but also provides sufficient supporting strength.

[0110] Since the connecting arm 134 is an independently set component, compared with directly connecting the passive component 13 and the elastic component 135 to the side wall of the door body 11, the passive component 13 and the elastic component 135 are indirectly connected to the door body 11 through the connecting arm 134, which facilitates the disassembly and replacement of the passive component 13 and the elastic component 135, and the passive component 13 will not directly wear the door body 11 during movement. When the passive component 13 wears the connecting arm 134 due to long-term movement, the connecting arm 134 can be directly replaced, making after-sales maintenance more convenient and the replacement cost low.

[0111] Referring to Figures 2, 3, and 4, and specifically Figure 4, a locking mechanism 16 is provided on the carrier body 20. The second end of the active component 12 is mounted on the frame of the carrier body 20. The active component 12 is locked by the locking mechanism 16, ensuring that the active component 12 does not rotate freely after being hit, thereby driving the passive component 13 to operate and open or close the door body 11. This effectively prevents the cargo lift from being misoperated or malfunctioning, which could lead to unexpected accidents, and further improves the safety of the cargo lift.

[0112] For example, when the cargo lifting equipment is descending along the guide rail frame 200, the active component 12 extending from the carrier body 20 accidentally hits an obstacle, lifting the active component 12, causing the active component 12 to rotate to drive the passive component 13 to move, and then open the door body 11, causing dangerous accidents, such as people falling accidents, or cargo in the carrier body 20 falling from a high altitude and injuring ground workers.

[0113] FIG6 is a schematic structural diagram of the locking mechanism 16 in the cargo lifting device provided by an embodiment of the present invention.

[0114] Referring to Figure 6, in some embodiments of the present invention, the locking mechanism 16 includes a fixing base 161, a locking hook 162 and a handle 163. The fixing base 161 is installed to the carrier body, the locking hook 162 is rotatably connected to the fixing base 161 through a locking shaft 164, and the handle 163 is connected to the locking hook 162.

[0115] The lock hook 162 is in a vertical position due to its own gravity. At this time, the lock hook 162 can prevent the active component 12 from accidentally opening. When the active component 12 needs to be rotated to open the door body 11, the driving handle 163 is rotated to rotate the lock hook 162 around the lock shaft 164 to move away from the active component 12, allowing the active component 12 to be lifted freely.

[0116] Of course, the handle 163 can also be used to independently lock and unlock the lock hook 162 to lock the lock hook 162 on the active component 12 or separate the lock hook 162 from the active component 12.

[0117] Specifically, the fixing seat 161 includes a first fixing plate 1611 and a second fixing plate 1612 arranged opposite to each other, which clamp the side wall of the carrier body 20, that is, the first fixing plate 1611 and the second fixing plate 1612 are respectively arranged on both sides of the side wall of the carrier body 20.

[0118] The lock hook 162 includes an integral lock body 1621 and a hook body 1622. The lock body 1621 and the hook body 1622 are arranged at an angle, which can be a right angle or an angle greater than 0° and less than 90°. The intersection of the lock body 1621 and the hook body 1622 is rotatably connected to the first fixed plate 1611 via a lock shaft 164. The lock body 1621 and the hook body 1622 can rotate freely about the axis of the lock shaft 164. The handle 163 comprises a handle shaft 1631 and a spherical handle body 1632 disposed at the end of the handle shaft 1631. The handle shaft 1631 is fixedly connected to the lock body 1621. The lock body 1621 can be rotated by the handle 163 to cause the hook body 1622 to hook onto the active component 12, thereby locking the active component 12. Alternatively, the hook body 1622 can be separated from the active component 12, allowing the active component 12 to rotate freely.

[0119] Among them, the handle body 1632 is a spherical structure, and the handle body 1632 is located at the end of the lock body 1621 away from the hook body 1622. The lock body 1621 is a rod-shaped structure, which is arranged at both ends of the lock body 1621 relative to the handle body 1632 and the hook body 1622, so that the handle body 1632 has the effect of increasing its own weight, and then the lock hook 162 is in a vertical state more quickly under the action of its own gravity. At this time, the lock hook 162 can limit the active component 12 from opening accidentally.

[0120] In order to enable locking or unlocking operations on both the inside and outside of the carrier body 20, the lock shaft 164 is extended to pass through the second fixing plate 1612 and extend from the second fixing plate 1612, and another sphere is connected to the end of the lock shaft 164 to form another handle.

[0121] Alternatively, components such as elastic pins can be provided on the end face of the carrier body 20 to lock the active component 12. These components are located in the rotational path of the active component 12. When the active component 12 rotates to the position of the elastic pin, the elastic pin is squeezed to retract it. Once the active component 12 engages a buckle (not numbered in the figure) on the carrier body through the elastic pin, the elastic pin returns to its original position, locking the active component 12. To unlock the active component 12, simply continue squeezing the elastic pin to retract it.

[0122] Continuing with FIG6 , in some embodiments of the present invention, to prevent the lock body 1621 and the hook body 1622 from rotating freely and being stopped on the active component 12, the locking mechanism 16 further includes a stopper 165 disposed on the fixing seat 161 and located in the rotation path of the lock hook 162. This prevents the lock body 1621 and the hook body 1622 from excessively rotating and thus causing the lock to fail.

[0123] The limiting member 165 can be a limiting block fixed to the first fixing plate 1611 by fasteners such as screws and bolts, or a mechanical limiting plate. In order to enable the lock hook 162 to be quickly reset, a spring can also be arranged between the limiting member 165 and the hook body 1622 or the lock body 1621, so that the hook body 1622 and the lock body 1621 are automatically reset by the spring.

[0124] Figure 7 is a schematic diagram of the partial structure of the door assembly 10 of the cargo lifting equipment provided in an embodiment of the present invention; Figure 8 is an enlarged view of part A in Figure 7; Figure 9 is a side view of the partial structure of the door assembly 10 of the cargo lifting equipment provided in an embodiment of the present invention.

[0125] Continuing to refer to Figures 2 and 3, and to Figures 7 to 9 in detail, in some embodiments of the present invention, a support mechanism 17 is provided between the door body 11 and the carrier body 20, and the support mechanism 17 is suitable for switching between an expanded state and a closed state; when the door body 11 is open, the support mechanism 17 is in an expanded state to support the door body 11; when the door body 11 is closed, the support mechanism 17 is in a closed state.

[0126] In this embodiment of the present invention, a support mechanism 17 is provided between the door body 11 and the carrier body 20. This supports the door body 11, thereby avoiding the need for the passive component 13 to both drive and support the vehicle. This reduces the supporting function of the passive component 13 and increases the service life of the passive component 13. Furthermore, when the door body 11 is opened, the support mechanism 17 is in its deployed state, forming a guardrail for the door body 11, preventing the load from accidentally falling from either side of the door body 11.

[0127] Specifically, the support mechanism 17 includes a first link 171 and a second link 172 rotatably connected. The length of the first link 171 is greater than that of the second link 172 . The first link 171 is connected to the door body 11 , and the second link 172 is rotatably connected to the carrier body 20 .

[0128] When the door body 11 is opened, the support mechanism 17 is unfolded, that is, the first connecting rod 171 and the second connecting rod 172 are opened, and together with the door body 11 and the carrier body 20, a parallelogram connecting rod mechanism is formed to improve the stability of the door body 11 and prevent the door body 11 from being damaged due to unstable support.

[0129] When the door body 11 is closed, the support mechanism 17 is folded, that is, the first connecting rod 171 and the second connecting rod 172 are attached to the surface of the carrying body, which does not take up extra space and can also keep the appearance of the cargo lifting equipment neat.

[0130] Continuing to refer to Figures 2 and 3, and to Figures 7 to 9 in detail, in some embodiments of the present invention, in order to make the support mechanism 17 more stable, the support mechanism 17 also includes at least one third connecting rod 173; the third connecting rod 173 is rotatably connected between the first connecting rod 171 and the carrying body. When the door body 11 is opened, the third connecting rod 173 is parallel to the second connecting rod 172, further improving the structural strength and supporting performance of the support mechanism 17.

[0131] Among them, one third connecting rod 173 can be provided, and multiple third connecting rods 173 can also be provided according to the situation. After the multiple third connecting rods 173 are unfolded, they are parallel to each other.

[0132] In an embodiment of the present invention, the door body 11 is provided with a first side and a second side along the length direction, and the first side and the second side of the door body 11 are both provided with door shafts. The door body 11 is rotatably connected to the connecting piece (triangular connecting piece) of the carrying body 20 through the door shafts on both sides.

[0133] When the door assembly 10 provided in the embodiment of the present invention is applied to a cargo lift to perform linkage opening or closing of the door body 11, the following operations are performed:

[0134] Continuing to refer to FIG2 , when the door body 11 is opened, the handle 163 is pulled to rotate, so that the handle 163 drives the lock hook 162 to rotate around the lock shaft 164 to unlock the door. At this time, the handle on the active rod body 121 is used to push the active rod body 121 upward, so that the active rod body 121 rotates around the connection point with the carrier body 20. The first end of the passive component 13 performs a circular motion on a circle with a preset distance as the radius and a virtual center of the first mounting position 1221 as the center. The second end of the passive component 13 performs a circular motion on a circle with a preset distance as the radius and a virtual center of the first mounting hole 1341 as the center. The rotation of the active component 12 is converted into the displacement of the passive component 13 until the door body 11 is opened to the preset position. At this time, the elastic member 135 is in a stretched state and has the ability to recover elastic deformation.

[0135] Continuing to refer to Figure 3, when the door body 11 is closed, the handle on the active rod body 121 is used to pull the active rod body 121 downward, causing the active rod body 121 to rotate around the connection point with the carrier body 20. The first end of the passive component 13 performs a circular motion on a circle with the virtual center of the first mounting position 1221 as the center and a preset distance as the radius. The second end of the passive component 13 performs a circular motion on a circle with the virtual center of the first mounting hole 1341 as the center and a preset distance as the radius. The rotation of the active component 12 is converted into the displacement of the passive component 13. The active rod body 121 is continuously pulled downward so that the active rod body 121 presses the lock hook 162, the locking mechanism 16 is opened, and the active rod body 121 is continuously pressed down to the final closed position. The locking mechanism 16 automatically closes and locks under the action of its own gravity. At this time, the elastic member 135 is in a compressed state and has the ability to recover elastic deformation.

[0136] The door assembly 10 provided in an embodiment of the present invention sets a linkage mechanism between the door body 11 and the carrier body 20, and indirectly opens or closes the door body through the linkage mechanism, which makes the operation safer and more reliable. In addition, the active component 12 in the linkage mechanism is suitable for locking to the carrier body, and the door body 11 will not be accidentally opened or closed due to maloperation such as collision, and the safety is higher.

[0137] When the door assembly 10 is applied to the carrier body 100 of a cargo lift, it can improve the safety of the cargo lift, reduce potential safety hazards, and lower the failure rate of the cargo lift. Specifically, the linkage mechanism includes an active component 12 and a passive component 13. Rotating the active component 12 causes the active component 12 to move the passive component 13, thereby opening or closing the door body 11. This closing and opening action requires applying force to the active component 12, which is then transmitted to the passive component 13. The passive component 13 indirectly controls the opening or closing of the door body 11, providing high safety and labor-saving operation.

[0138] Furthermore, the carrier body is provided with a locking mechanism 16. The second end of the active component 12 is mounted on the carrier body and locked by the locking mechanism 16. The active component 12 does not rotate freely, driving the passive component 13 to operate and open or close the door body 11. This effectively prevents the cargo lift from being misoperated or malfunctioning, which could cause accidents, and improves the safety of the cargo lift.

[0139] It should be noted that the technical solutions in the various embodiments of the present invention can be combined with each other, but the basis for the mutual combination is that it can be implemented by ordinary technicians in this field; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist, that is, it does not fall within the scope of protection of the present invention.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A door assembly, characterized in that: include: A door body (11) is rotatably mounted to the carrier body; The linkage mechanism comprises an active component (12) and a passive component (13), wherein the active component (12) is rotatably arranged on the carrier body; and the passive component (13) is respectively connected to the active component (12) and the door body (11); When the active component (12) moves relative to the carrier body, the active component (12) drives the passive component (13) to move, so as to open or close the door body (11).

2. The door assembly (10) according to claim 1, characterized in that The active component (12) comprises an active rod body (121) and a connecting portion (122) which are connected to each other; The connecting portion (122) is provided with a first mounting position (1221) and a second mounting position (1222) at intervals, the first mounting position (1221) being used for connecting to the carrier body, and the second mounting position (1222) being used for connecting to the passive component (13); when the active component (12) moves, the passive component (13) moves around the center of the first mounting position (1221).

3. The door assembly (10) according to claim 2, characterized in that: The first installation position (1221) is provided with a bearing seat (1223), and the bearing seat (1223) is provided with a rotating shaft, and the rotating shaft is rotatably matched with the carrying body.

4. The door assembly (10) according to claim 1, characterized in that The passive component (13) comprises a passive rod body (131), a first end of the passive rod body (131) is connected to the active component (12), and a second end of the passive rod body (131) is connected to the door body (11).

5. The door assembly (10) according to claim 4, characterized in that The first end of the passive rod body (131) is connected to the active component (12) via a first universal joint (132); and / or The second end of the passive rod body (131) is connected to the door body (11) via a second universal joint (133).

6. The door assembly (10) according to claim 4, characterized in that The passive rod body (131) comprises a first adjustment rod (1311) and a second adjustment rod (1312) which are connected to each other; The first adjusting rod (1311) is connected to the active component (12), and the second adjusting rod (1312) is connected to the door body (11); the distance between the first adjusting rod (1311) and the second adjusting rod (1312) is suitable for adjustment.

7. The door assembly (10) according to claim 6, characterized in that The passive rod body (131) further includes an adjusting member (1313); The adjusting member (1313) is respectively threadedly connected to the first adjusting rod (1311) and the second adjusting rod (1312), and the threads of the first adjusting rod (1311) and the second adjusting rod (1312) are in opposite directions.

8. The door assembly (10) according to claim 4, characterized in that The passive component (13) further includes a connecting arm (134); The connecting arm (134) is provided with a first mounting hole (1341) and a second mounting hole (1342) at intervals; the door body (11) is connected to the first mounting hole (1341), and the passive rod body (131) is connected to the second mounting hole (1342); when the active component (12) moves, the passive component (13) moves around the first mounting hole (1341).

9. The door assembly (10) according to claim 4, characterized in that The passive component (13) further includes an elastic member (135); The elastic member (135) is connected to the carrier body and the passive rod body (131) respectively; or The elastic member (135) is respectively connected to the carrier body and the door body (11).

10. The door assembly (10) according to claim 1, characterized in that The carrier body is provided with a locking mechanism (16); When the door body (11) is closed, the locking mechanism (16) locks the door body (11) to the carrier body.

11. The door assembly (10) according to claim 10, characterized in that The locking mechanism (16) comprises a fixing seat (161), a locking hook (162) and a handle (163); the fixing seat (161) is mounted on the carrier body; the locking hook (162) is rotatably connected to the fixing seat (161); and the handle (163) is connected to the locking hook (162).

12. The door assembly (10) according to claim 11, characterized in that The locking mechanism (16) further comprises a limiting member (165), wherein the limiting member (165) is arranged on the fixing seat (161) and is located on the movement path of the locking hook (162).

13. The door assembly (10) according to any one of claims 1 to 12, characterized in that: A support mechanism (17) is provided between the door body (11) and the carrier body, and the support mechanism (17) is suitable for switching between an unfolded state and a closed state; In the unfolded state, the door body (11) is open; In the closed state, the door body (11) is closed.

14. The door assembly (10) according to claim 13, characterized in that The supporting mechanism (17) comprises a first connecting rod (171) and a second connecting rod (172) which are rotatably connected, wherein the first connecting rod (171) is rotatably connected to the door body (11), and the second connecting rod (172) is connected to the carrying body.

15. The door assembly (10) according to claim 14, characterized in that The support mechanism (17) further comprises at least one third connecting rod (173); The third connecting rod (173) is rotatably connected to the first connecting rod (171) and the carrying body respectively. When the door body (11) is opened, the third connecting rod (173) is parallel to the second connecting rod (172).

16. A carrier body (100), characterized in that: It comprises a carrier body (20) and a door assembly (10) according to any one of claims 1 to 15, wherein the carrier body (20) is provided with an opening, and the door assembly (10) is arranged at the opening to open or close the opening.

17. A cargo lifting device, characterized in that: It comprises a guide rail frame (200) and the carrier body (100) according to claim 16; The guide rail frame (200) is provided with a rack (300), and the carrier body (100) is in transmission cooperation with the rack (300) and in guiding cooperation with the guide rail frame (200).

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