Electric unlocking mechanism for container door

Abstract

The utility model discloses an electric unlocking mechanism for a container door, which is mounted in a shell and comprises an electric unlocking component and a lock body component. The electric unlocking assembly is in transmission connection with the lock body assembly through a second rocker arm; the electric switch-on assembly comprises a motor, and the motor can drive the second rocker arm to rotate; the lock body assembly comprises a ratchet wheel and a pawl, the ratchet wheel and the pawl can rotate respectively, when the ratchet wheel and the pawl are located at the upper lock position, the ratchet wheel and the pawl are meshed, the rotating face of the ratchet wheel and the rotating face of the pawl are parallel, and an included angle is formed between the rotating face of the second rocker arm and the rotating face of the ratchet wheel or the rotating face of the pawl. The pawl is provided with a stress column, a shifting plate is correspondingly arranged on the second rocker arm, and the shifting plate abuts against the stress column all the time. By optimizing the transmission structure and reducing unnecessary mechanical parts, the structure is more compact and simple, the manufacturing cost and the maintenance cost are reduced, the manufacturing efficiency is improved, and the market competitiveness is higher.

Description

Technical Field

[0001] The utility model relates to the field of electric unlocking of cargo box doors, in particular to an electric unlocking mechanism for cargo box doors. Background Art

[0002] Existing electric locks for cargo doors generally face technical problems such as many parts and complex internal transmission mechanisms. This results in a large number of noise sources during transmission of the internal structure of the electric lock, and loud noise when locking and unlocking.

[0003] Furthermore, the numerous parts and complex transmission mechanism make electric cargo door unlocking difficult to assemble and expensive, increasing manufacturing costs and potentially making maintenance difficult. This high cost limits its widespread application, while the noise generated during electric unlocking can cause unnecessary disruption to the work environment and users. Therefore, developing an electric cargo door unlocking mechanism with a simple structure, low cost, and low noise levels is of great significance. Utility Model Content

[0004] The utility model aims to provide an electric unlocking mechanism for a cargo box door, so as to solve the technical problems in the prior art of the electric unlocking mechanism for a cargo box door having many parts and a complicated internal transmission mechanism.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A cargo door electric unlocking mechanism is installed in an outer shell, and includes an electric opening component and a lock body component; the electric opening component and the lock body component are connected through a second rocker arm transmission; the electric opening component includes a motor, and the motor can drive the second rocker arm to rotate; the lock body assembly includes a ratchet and a pawl, and the ratchet and pawl can rotate separately. When the ratchet and pawl are in the upper locking position, the ratchet and pawl are engaged, and the rotating surfaces of the ratchet and pawl are parallel, and the rotating surface of the second rocker arm has an angle with the rotating surface of the ratchet or the pawl; the pawl has a force column, and the corresponding second rocker arm is provided with a shift plate, and the shift plate is always in contact with the force column.

[0007] The working principle of this solution is: when unlocking, the motor starts and drives the second rocker arm to rotate toward the unlocking position, and the shift plate can push the force-bearing column, so that the pawl rotates in the direction away from the ratchet to the pawl unlocking position, so that the ratchet and the pawl are disengaged, and the ratchet can be rotated to the unlocking position to achieve unlocking. The housing is provided with both an electric opening component and a lock body component, and electric opening and unlocking can be achieved only through the transmission action of a single component of the second rocker arm, which simplifies the part structure and transmission relationship, thereby reducing the volume of the entire door lock, reducing the energy loss of the intermediate transmission link, and reducing the number of noise sources, thereby suppressing the generation of noise. The electric unlocking mechanism of the cargo door of this solution adopts an integrated lock body actuator structure, which simplifies the number of parts, saves assembly time and part costs, reduces the overall size of the product, and reduces weight.

[0008] As a preferred solution in which the motor can drive the second rocker arm to rotate, a protective shell is provided on the outer periphery of the electric switch assembly, and the electric switch assembly is installed in the protective shell. The electric switch assembly also includes a worm and a worm wheel, one end of the worm is fixedly connected to the output end of the motor, and the other end of the worm is engaged with the worm wheel, and the worm wheel is rotatably connected to the protective shell;

[0009] A first rocker arm is coaxially arranged with the worm gear, and is rotatably connected to the protective shell. When the worm gear rotates, the first rocker arm can rotate synchronously; an opening toggle arm is also rotatably connected to the protective shell, and is rotatably connected to the protective shell; the opening toggle arm and the rotation plane of the first rocker arm are parallel, and both form an angle with the rotation plane of the second rocker arm; the opening toggle arm is transmission-connected to the second rocker arm;

[0010] The motor can drive the first rocker arm to rotate through the worm and the worm gear, and the first rocker arm can drive the opening toggle arm to rotate, so that the electric opening component and the lock body component are connected through the second rocker arm transmission.

[0011] This solution uses a worm and worm gear transmission method. When the motor starts, the worm drives the worm gear to rotate, which in turn drives the first rocker arm to rotate synchronously. This transmission method is simple and efficient, reducing energy loss and noise in the intermediate links.

[0012] As a preferred setting method for the rotating surfaces of each component, the rotating surfaces of the opening toggle arm and the first rocker arm are parallel to the rotating surfaces of the ratchet and pawl respectively, the rotating surface of the second rocker arm is perpendicular to the rotating surfaces of the opening toggle arm and the first rocker arm, and at the same time, the rotating surface of the second rocker arm is perpendicular to the rotating surfaces of the ratchet and pawl.

[0013] This arrangement can further make the spatial arrangement of various components inside the lock body more compact, further improve the rationality of the spatial arrangement of the internal structure of the lock body, and further reduce the volume of the lock body.

[0014] As an implementation of the installation position of the first rocker arm, the first rocker arm and the opening toggle arm are both located outside the protective shell.

[0015] This is conducive to modular installation. The protective shell and the internal motor, worm and worm gear can be pre-assembled in advance to obtain a prefabricated part of the electric opening component. Only the first rocker arm and the opening toggle arm need to be assembled. This can simplify the assembly steps and save assembly time. At the same time, it can also ensure the assembly quality and improve the yield rate.

[0016] As a specific implementation method of the transmission connection between the opening toggle arm and the second rocker arm, the opening toggle arm is rotatably connected to the protective shell through a third rotating shaft, and the third rotating shaft is fixed on the protective shell; the opening toggle arm includes a first transmission arm and a second transmission arm, and the first transmission arm and the second transmission arm respectively extend radially outward from the center of the third rotating shaft, and there is an angle between the extension lines of the first transmission arm and the second transmission arm; the first transmission arm is engaged with the first rocker arm, and the second transmission arm is engaged with the second rocker arm.

[0017] In this way, when the first rocker arm rotates, the first transmission arm is exerted with force, driving the opening and toggling arm to rotate, and then driving the second transmission arm to rotate accordingly, exerting force on the second rocker arm, causing the second rocker arm to rotate.

[0018] Preferably, a third return spring is installed on the third rotating shaft. When the opening toggle arm is rotated to the unlocked position, the third return spring has elastic potential energy; when the motor assembly is reset, the first rocker arm reverses, canceling the force applied to the opening toggle arm, and the opening toggle arm is reset under the elastic return force of the third return spring.

[0019] Preferably, the housing includes a first housing and a second housing, the ratchet and the pawl are rotatably connected to the inner bottom surface of the second housing, the second rocker arm is rotatably connected to the side wall of the second housing via a second rotating shaft, the second rotating shaft is fixed to the side wall of the second housing, and a second return spring is installed on the second rotating shaft. When the opening toggle arm drives the second rocker arm to rotate toward the unlocked position, the second return spring has elastic potential energy;

[0020] When the motor assembly is reset, the first rocker arm reverses, canceling the force applied to the opening toggle arm, and the opening toggle arm is reset under the elastic reset force of the third reset spring. At the same time, the opening toggle arm cancels the force applied to the second rocker arm, and the second rocker arm is reset under the elastic reset force of the second reset spring.

[0021] As a specific implementation method for the ratchet and pawl to rotate, the ratchet and pawl can respectively rotate around the ratchet rotation axis and the pawl rotation axis, the ratchet rotation axis and the pawl rotation axis are respectively fixed on the second shell, and the ratchet rotation axis and the pawl rotation axis are respectively provided with a ratchet return spring and a pawl return spring, when the ratchet is in the locked position, the ratchet return spring has elastic potential energy, and when the pawl is in the unlocked position, the pawl return spring has elastic potential energy.

[0022] When unlocking, the pawl rotates toward the unlocking position and releases the ratchet, and the ratchet can rotate to the unlocking position under the elastic reset force of the ratchet reset spring to open the cargo door; when the lock body assembly completes the unlocking, the electric opening assembly resets, and the opening toggle arm releases the second rocker arm, and then the second rocker arm cancels the thrust on the pawl, and then the pawl will reset under the elastic reset force of the pawl reset spring.

[0023] Preferably, the protective shell includes an upper shell and a lower shell, the upper shell is detachably connected to the lower shell, and the third rotating shaft is fixedly connected to the upper shell; a first rotating shaft is fixed on the lower shell, and the worm gear is rotatably connected to the first rotating shaft, and the free end of the first rotating shaft extends from the upper shell to the outside of the upper shell for installing a first rocker arm; a first return spring is installed on the first rotating shaft, and the first return spring can accumulate elastic potential energy during the process of the worm gear rotating to the unlocking position, and is used to assist the worm gear in resetting after the unlocking is completed.

[0024] Preferably, a mounting bracket is also installed at the bottom of the lower shell, and the lock body assembly is located between the mounting bracket and the second shell. A rubber buffer block is installed at the corresponding position of the mounting bracket facing the ratchet, and the rubber buffer block is in contact with the surface of the ratchet. The rubber buffer block is used for soft limiting. The present invention effectively reduces the noise during the electric opening process.

[0025] The technical solution of the utility model has the following beneficial effects:

[0026] Compared with the traditional electric unlocking mechanism of the cargo door, this embodiment makes the structure more compact and simple by optimizing the transmission structure and reducing unnecessary mechanical components, which is beneficial to manufacturing costs and maintenance costs, as well as improving manufacturing efficiency, making it more competitive in the market. Moreover, the simple and clear transmission relationship between the various components makes the entire structure stable and reliable, ensuring the long-term stable operation of the electric unlocking mechanism of the cargo door. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings, in which:

[0028] Figure 1This is a schematic diagram of the overall structure of the electric unlocking of the cargo door in an embodiment of the present utility model.

[0029] Figure 2 This is an exploded view of the overall structure of the electric unlocking of the cargo door in an embodiment of the present utility model.

[0030] Figure 3 This is a schematic diagram of the internal structure of the electric lock and opening assembly of the cargo door according to an embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of the internal structure of the electric unlocking lock body assembly of the cargo door according to an embodiment of the present invention.

[0032] Figure 5 This is a schematic diagram of the partial structure of the electric unlocking assembly and lock body assembly of the cargo door electric unlocking according to an embodiment of the present invention.

[0033] Figure 6 This is a schematic diagram of the electric unlocking process of the cargo door in an embodiment of the present invention.

[0034] Explanation of the accompanying drawings: 101, motor; 102, worm; 103, worm wheel; 104, first return spring; 105, first rocker arm; 106, upper shell; 107, lower shell; 108, first rotating shaft; 201, ratchet; 202, ratchet rotating shaft; 203, ratchet return spring; 301, pawl; 302, pawl rotating shaft; 303, pawl return spring; 304, force column; 400, second rocker arm; 401, toggle pin; 402, toggle plate; 403, second return spring; 404, second rotating shaft; 500, opening toggle arm; 501, first transmission arm; 502, second transmission arm; 503, third return spring; 504, third rotating shaft; 601, mounting bracket; 602, first shell; 603, second shell; 604, rubber buffer block. DETAILED DESCRIPTION

[0035] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of the electric unlocking mechanism for a cargo door of the present invention in conjunction with the accompanying drawings.

[0036] The utility model can be applied to the electric unlocking of cargo box doors, which solves the technical problems in the prior art of the electric unlocking of cargo box doors having many parts and a complicated internal transmission mechanism, and aims to obtain an electric unlocking mechanism for cargo box doors with a simplified structure, low cost and low electric opening noise.

[0037] See also Figure 1 and Figure 2, based on the technical problems solved above, this embodiment discloses an electric unlocking mechanism for a cargo box door, which is installed in a shell and includes an electric opening component and a lock body component; the electric opening component and the lock body component are connected to each other through a second rocker arm 400; the electric opening component includes a motor 101, and the motor 101 can drive the second rocker arm 400 to rotate; the lock body assembly includes a ratchet 201 and a pawl 301, and the ratchet 201 and the pawl 301 can rotate respectively. When the ratchet 201 and the pawl 301 are in the upper locking position, the ratchet 201 and the pawl 301 are engaged, and the rotating surfaces of the ratchet 201 and the pawl 301 are parallel, and the rotating surface of the second rocker arm 400 has an angle with the rotating surface of the ratchet 201 or the pawl 301; the pawl 301 has a force column 304, and the corresponding second rocker arm 400 is provided with a dial plate 402, and the dial plate 402 always abuts against the force column 304. In this way, when unlocking, the motor 101 starts and drives the second rocker arm 400 to rotate toward the unlocking position. The dial plate 402 can push the force-bearing column 304, so that the pawl 301 rotates in the direction away from the ratchet 201 to the pawl 301 unlocking position, so that the ratchet 201 and the pawl 301 are disengaged, so that the ratchet 201 can rotate to the unlocking position to achieve unlocking.

[0038] The shell is provided with an electric opening assembly and a lock body assembly at the same time, and electric opening and unlocking can be achieved only through the transmission action of a single component, the second rocker arm 400, thereby simplifying the parts structure and transmission relationship, thereby reducing the volume of the entire door lock, reducing the energy loss in the intermediate transmission link, and reducing the number of noise sources, thereby suppressing the generation of noise.

[0039] In this embodiment, please refer to Figures 1 to 3As a way to realize that the motor 101 can drive the second rocker arm 400 to rotate, a protective shell is provided on the periphery of the electric switch component, and the electric switch component is installed in the protective shell. The electric switch component also includes a worm 102 and a worm wheel 103. One end of the worm 102 is fixedly connected to the output end of the motor 101, and the other end of the worm 102 is engaged with the worm wheel 103, and the worm wheel 103 is rotatably connected to the protective shell; a first rocker arm 105 is coaxially provided with the worm wheel 103, and the first rocker arm 105 is rotatably connected to the protective shell. When the worm wheel 103 rotates, the first rocker arm 105 can can rotate synchronously; the protective shell is also rotatably connected to an opening toggle arm 500, and the opening toggle arm 500 is rotatably connected to the protective shell; the rotation plane of the opening toggle arm 500 and the first rocker arm 105 are parallel, and both have an angle with the rotation plane of the second rocker arm 400; the opening toggle arm 500 is transmission-connected to the second rocker arm 400; the motor 101 can drive the first rocker arm 105 to rotate through the worm 102 and the worm gear 103, and the first rocker arm 105 can drive the opening toggle arm 500 to rotate, so as to realize the transmission connection between the electric opening component and the lock body component through the second rocker arm 400.

[0040] In this embodiment, a transmission method using a worm 102 and a worm wheel 103 is used. When the motor 101 is started, the worm 102 drives the worm wheel 103 to rotate, which in turn drives the first rocker arm 105 to rotate synchronously. This transmission method is simple and efficient, reducing energy loss and noise generation in the intermediate links.

[0041] In this embodiment, please refer to Figures 1 to 4 As for the arrangement of the rotational surfaces of the various components, the rotational surfaces of the opening toggle arm 500 and the first rocker arm 105 are parallel to the rotational surfaces of the ratchet 201 and the pawl 301, respectively. The rotational surface of the second rocker arm 400 is perpendicular to the rotational surfaces of the opening toggle arm 500 and the first rocker arm 105. Furthermore, the rotational surface of the second rocker arm 400 is also perpendicular to the rotational surfaces of the ratchet 201 and the pawl 301. This arrangement further compacts the spatial arrangement of the various components within the lock body, further improving the rationality of the spatial arrangement of the internal structure of the lock body and further reducing the size of the lock body.

[0042] In this embodiment, please refer to Figure 2As an embodiment of the installation position of the first rocker arm 105, the first rocker arm 105 and the opening toggle arm 500 are both located outside the protective shell. This facilitates modular installation, allowing the protective shell and the internal motor 101, worm 102, and worm gear 103 to be preassembled in advance to obtain a prefabricated electric opening assembly. Only the first rocker arm 105 and the opening toggle arm 500 need to be assembled, simplifying the assembly process and saving assembly time, while also ensuring assembly quality and improving the yield rate.

[0043] In this embodiment, please refer to Figures 2 to 3 As a specific implementation of the transmission connection between the opening and toggling arm 500 and the second rocker arm 400, the opening and toggling arm 500 is rotationally connected to the protective shell via a third rotating shaft 504, and the third rotating shaft 504 is fixed to the protective shell. The opening and toggling arm 500 includes a first transmission arm 501 and a second transmission arm 502, each extending radially outward from the center of the third rotating shaft 504, and an angle is formed between the extension lines of the first transmission arm 501 and the second transmission arm 502. The first transmission arm 501 engages with the first rocker arm 105, and the second transmission arm 502 engages with the second rocker arm 400. In this way, when the first rocker arm 105 rotates, a force is applied to the first transmission arm 501, driving the opening and toggling arm 500 to rotate, which in turn drives the second transmission arm 502 to rotate accordingly, applying a force to the second rocker arm 400, causing it to rotate.

[0044] For details, please refer to Figure 4 To better engage the second transmission arm 502 with the second rocker arm 400, a toggle pin 401 is provided on the second rocker arm 400. The second transmission arm 502 engages with the toggle pin 401. When the first rocker arm 105 rotates, it pushes the first transmission arm 501, driving the toggle arm 500 to rotate. The second transmission arm 502 then rotates with it and applies force to the toggle pin 401, causing the second rocker arm 400 to rotate.

[0045] In this embodiment, please refer to Figure 2 and Figure 4The housing includes a first housing 602 and a second housing 603, the ratchet 201 and the pawl 301 are rotatably connected to the inner bottom surface of the second housing 603, the second rocker arm 400 is rotatably connected to the side wall of the second housing 603 through the second rotating shaft 404, the second rotating shaft 404 is fixed to the side wall of the second housing 603, and the second rotating shaft 404 is installed with a second return spring 403. When the opening toggle arm 500 drives the second rocker arm 400 to rotate toward the unlocking position, the second return spring 403 has elastic potential energy; when the motor 101 assembly is reset, the first rocker arm 105 reverses, cancels the force applied to the opening toggle arm 500, and the opening toggle arm 500 is reset under the elastic return force of the third return spring 503. At the same time, the opening toggle arm 500 cancels the force applied to the second rocker arm 400, and the second rocker arm 400 is reset under the elastic return force of the second return spring 403.

[0046] In this embodiment, please refer to Figure 2 and Figure 4 As a specific implementation method for the ratchet 201 and the pawl 301 to rotate, the ratchet 201 and the pawl 301 can respectively rotate around the ratchet 201 rotation axis and the pawl 301 rotation axis, and the ratchet 201 rotation axis and the pawl 301 rotation axis are respectively fixed on the second shell 603, and the ratchet 201 rotation axis and the pawl 301 rotation axis are respectively provided with a ratchet 201 return spring and a pawl 301 return spring. When the ratchet 201 is in the locked position, the ratchet 201 return spring has elastic potential energy, and when the pawl 301 is in the unlocked position, the pawl 301 return spring has elastic potential energy.

[0047] When unlocking, see Figure 6 The pawl 301 rotates toward the unlocking position and releases the ratchet 201. The ratchet 201 can rotate to the unlocking position under the elastic reset force of the ratchet 201 reset spring to open the cargo door. When the lock body assembly completes the unlocking, the electric opening assembly resets, and the toggle arm 500 is opened to release the second rocker arm 400, and then the second rocker arm 400 cancels the thrust on the pawl 301. Then the pawl 301 will be reset under the elastic reset force of the pawl 301 reset spring.

[0048] In this embodiment, please refer to Figure 2 and Figure 5 A third return spring 503 is installed on the third rotating shaft 504. When the opening toggle arm 500 rotates to the unlocking position, the third return spring 503 has elastic potential energy; when the motor 101 assembly is reset, the first rocker arm 105 reverses, canceling the force applied to the opening toggle arm 500, and the opening toggle arm 500 is reset under the elastic return force of the third return spring 503.

[0049] For details, please refer to Figure 2 The protective shell includes an upper shell 106 and a lower shell 107 , the upper shell 106 and the lower shell 107 are detachably connected, and the third rotating shaft 504 is fixedly connected to the upper shell 106 .

[0050] In this embodiment, please refer to Figure 2 A mounting bracket 601 is also installed at the bottom of the lower shell 107. The lock body assembly is located between the mounting bracket 601 and the second shell 603. A rubber buffer block 604 is installed at the corresponding position of the mounting bracket 601 facing the ratchet 201. The rubber buffer block 604 is in contact with the surface of the ratchet 201. The rubber buffer block 604 is used for soft limiting. The present invention effectively reduces the noise during the electric opening process.

[0051] In this embodiment, please refer to Figure 2 and Figure 3 A first rotating shaft 108 is fixed on the lower housing 107, and the worm gear 103 is rotatably connected to the first rotating shaft 108. The free end of the first rotating shaft 108 extends from the outer side of the upper housing 106 to the upper housing 106 for mounting the first rocker arm 105; a first return spring 104 is mounted on the first rotating shaft 108, and the first return spring 104 can accumulate elastic potential energy when the worm gear 103 rotates to the unlocking position, and is used to assist the worm gear 103 in resetting after the unlocking is completed.

[0052] The working process of this embodiment is:

[0053] 1. When the lock body assembly is locked, the ratchet 201 and the pawl 301 are engaged;

[0054] 2. When unlocking, the motor 101 runs and drives the worm 102 to rotate, and then drives the worm wheel 103 to rotate. At the same time, the first rocker arm 105 will rotate synchronously with the worm wheel 103. During the rotation process, the first rocker arm 105 will contact and drive the opening toggle arm 500 to rotate along the third rotation axis 504. The opening toggle arm 500 further pushes the toggle pin 401 of the second rocker arm 400, thereby pushing the second rocker arm 400 to make a circular motion. This series of transmission actions ensures the effective transmission of force and the precise execution of the action; during the rotation process, the second rocker arm 400 will contact and drive the pawl 301 to rotate along the rotation axis of the pawl 301, so that the meshing point of the pawl 301 and the ratchet 201 is disengaged. At this time, the ratchet 201 automatically returns to the fully open position under the action of the door reaction force and the spring force of the ratchet 201, thereby realizing the opening of the cargo door;

[0055] 3. After the unlocking process is completed, the motor 101 reverses and resets, driving the worm gear 103 to reverse and reset. At the same time, the first rocker arm 105 will reverse and reset synchronously with the worm gear 103, and the first rocker arm 105 will cancel the force applied to the opening toggle arm 500, and the opening toggle arm 500 will reset under the elastic reset force of the third reset spring 503. At the same time, the opening toggle arm 500 will synchronously cancel the force applied to the second rocker arm 400, and the second rocker arm 400 will reset under the elastic reset force of the second reset spring 403, and then the second rocker arm 400 will cancel the thrust on the pawl 301, and then the pawl 301 will reset under the elastic reset force of the pawl 301 reset spring.

[0056] The electric unlocking mechanism for a cargo door disclosed in this embodiment has the following technical effects:

[0057] Compared to conventional electric unlocking mechanisms for cargo doors, this embodiment optimizes the transmission structure and reduces unnecessary mechanical components, resulting in a more compact and concise structure. This reduces manufacturing and maintenance costs, improves manufacturing efficiency, and makes it more competitive in the market. Furthermore, the simple and clear transmission relationship between the various components makes the entire structure stable and reliable, ensuring the long-term stable operation of the electric unlocking mechanism for cargo doors.

[0058] At the same time, the electric unlocking mechanism of the cargo door effectively reduces the number of noise sources by simplifying the structure and optimizing the transmission method. Rubber buffer blocks are also provided to effectively reduce the noise during electric opening and improve the user experience.

[0059] In summary, the electric unlocking mechanism for the cargo door provided in this embodiment has a simple structure, low cost and low noise, and has significant technical advantages and market application prospects.

[0060] It will be understood that the present invention is described with reference to certain specific embodiments / examples. Those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments / examples without departing from the spirit and scope of the present invention. In light of the present invention, these features and embodiments / examples may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. The embodiments / examples described herein represent only a portion of the embodiments / examples of the present invention, and are not intended to be exhaustive. The components of the embodiments / examples of the present invention generally described and illustrated in the accompanying drawings may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments / examples of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments / examples of the present invention. Therefore, the present invention is not limited to the specific embodiments / examples disclosed herein. All other embodiments / examples deriving from the specific embodiments / examples disclosed herein without inventive effort by a person of ordinary skill in the art are intended to fall within the scope of protection of the present invention.

Claims

1. An electric unlocking mechanism for a cargo door, installed in a housing, characterized in that: It includes an electric opening component and a lock body component; the electric opening component and the lock body component are connected through a second rocker arm transmission; the electric opening component includes a motor, and the motor can drive the second rocker arm to rotate; the lock body assembly includes a ratchet and a pawl, and the ratchet and pawl can rotate respectively. When the ratchet and pawl are in the upper locking position, the ratchet and pawl are engaged, the rotating surfaces of the ratchet and pawl are parallel, and the rotating surface of the second rocker arm has an angle with the rotating surface of the ratchet or the pawl; the pawl has a force column, and the corresponding second rocker arm is provided with a shift plate, and the shift plate is always in contact with the force column.

2. The electric unlocking mechanism for the cargo door according to claim 1, characterized in that: A protective shell is provided on the outer periphery of the electric opening component, and the electric opening component is installed in the protective shell, and the electric opening component also includes a worm and a worm wheel, one end of the worm is fixedly connected to the output end of the motor, and the other end of the worm is meshed with the worm wheel, and the worm wheel is rotatably connected to the protective shell; a first rocker arm is provided coaxially with the worm wheel, and the first rocker arm is rotatably connected to the protective shell, and when the worm wheel rotates, the first rocker arm can rotate synchronously; an opening toggle arm is also rotatably connected to the protective shell, and the opening toggle arm is rotatably connected to the protective shell; the rotating planes of the opening toggle arm and the first rocker arm are parallel, and both have an angle with the rotating plane of the second rocker arm; the opening toggle arm is transmission-connected to the second rocker arm; the motor can drive the first rocker arm to rotate through the worm and worm wheel, and the first rocker arm can drive the opening toggle arm to rotate, so that the electric opening component and the lock body assembly are transmission-connected through the second rocker arm.

3. The electric unlocking mechanism for the cargo door according to claim 2, characterized in that: The rotation surfaces of the opening toggle arm and the first rocker arm are respectively parallel to the rotation surfaces of the ratchet and the pawl, the rotation surface of the second rocker arm is perpendicular to the rotation surfaces of the opening toggle arm and the first rocker arm, and the rotation surface of the second rocker arm is perpendicular to the rotation surfaces of the ratchet and the pawl.

4. The electric unlocking mechanism for the cargo door according to claim 2, characterized in that: The first rocker arm and the opening toggle arm are both located outside the protective shell.

5. The electric unlocking mechanism for the cargo door according to claim 2, characterized in that: The opening toggle arm is rotatably connected to the protective shell via a third rotating shaft, and the third rotating shaft is fixed to the protective shell; the opening toggle arm includes a first transmission arm and a second transmission arm, and the first transmission arm and the second transmission arm respectively extend radially outward from the center of the third rotating shaft, and there is an angle between the extension lines of the first transmission arm and the second transmission arm; the first transmission arm is engaged with the first rocker arm, and the second transmission arm is engaged with the second rocker arm.

6. The electric unlocking mechanism for the cargo door according to claim 5, characterized in that: A third return spring is installed on the third rotating shaft. When the opening toggle arm rotates to the unlocking position, the third return spring has elastic potential energy.

7. The electric unlocking mechanism for the cargo door according to claim 6, characterized in that: The housing includes a first housing and a second housing, the ratchet and the pawl are rotatably connected to the inner bottom surface of the second housing, the second rocker arm is rotatably connected to the side wall of the second housing through a second rotating shaft, the second rotating shaft is fixed to the side wall of the second housing, and a second return spring is installed on the second rotating shaft. When the toggle arm is opened to drive the second rocker arm to rotate toward the unlocked position, the second return spring has elastic potential energy.

8. The electric unlocking mechanism for the cargo door according to claim 7, characterized in that: The ratchet and pawl can rotate around the ratchet rotation axis and the pawl rotation axis respectively, and the ratchet rotation axis and the pawl rotation axis are respectively fixed to the second shell. The ratchet rotation axis and the pawl rotation axis are respectively provided with a ratchet return spring and a pawl return spring. When the ratchet is in the locked position, the ratchet return spring has elastic potential energy, and when the pawl is in the unlocked position, the pawl return spring has elastic potential energy.

9. The electric unlocking mechanism for the cargo door according to claim 8, characterized in that: The protective shell includes an upper shell and a lower shell, the upper shell is detachably connected to the lower shell, and the third rotating shaft is fixedly connected to the upper shell; a first rotating shaft is fixed on the lower shell, and the worm gear is rotatably connected to the first rotating shaft, and the free end of the first rotating shaft extends from the outside of the upper shell from the upper shell for installing a first rocker arm; a first return spring is installed on the first rotating shaft.

10. The electric unlocking mechanism for the cargo door according to claim 9, characterized in that: A mounting frame is also installed at the bottom of the lower shell body. The lock body assembly is located between the mounting frame and the second shell body. A rubber buffer block is installed at a corresponding position of the mounting frame facing the ratchet. The rubber buffer block contacts the surface of the ratchet.

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