Thin uniform load cabin door locking mechanism

Abstract

The invention discloses a thin uniform-load cabin door locking mechanism which comprises a driving end and a driven end. The driving end comprises a lock hook, an eccentric shaft assembly, a fan-shaped worm wheel assembly, a driving shell, a speed reducer, a motor and a position sensor. The eccentric shaft assembly is used for connecting the driving shell and the lock hook; the fan-shaped worm gear assembly is used for transmitting power and is connected with the speed reducer, the motor and the eccentric shaft assembly; the driving shell is used for supporting and limiting the fan-shaped worm wheel assembly, the eccentric shaft assembly, the lock hook, the speed reducer and the motor. The position sensor is used for monitoring position information of the fan-shaped worm gear in a locking / unlocking state; and the passive end is used for being matched with the lock hook to complete a locking / unlocking task. The lock hook is arranged in the fan-shaped worm gear, so that the structure is compact; secondly, double self-locking of the mechanism is realized by utilizing the self-locking property of worm transmission and the dead point characteristic of a four-bar mechanism; and finally, a disc spring is used at the driven end to provide initial locking force, and the locking retention force can be accurately adjusted.

Description

Technical Field

[0001] The present invention relates to the field of mechanism products, and particularly to a thin-type load-sharing hatch locking mechanism. Background Art

[0002] After the aircraft hatch is retracted, a locking mechanism is required to lock reliably to ensure the overall stiffness, and unlock when the hatch is opened. Limited by the internal space of the aircraft, when the locking mechanism meets the locking force requirements, the envelope size is strictly limited, and the size requirements in different directions are not the same.

[0003] At present, there are many studies on locking mechanisms at home and abroad, but the existing locking mechanism designs generally have the following problems: First, the driving path and the bearing path are not coplanar, resulting in an increase in the envelope size of the mechanism in a specific direction; second, the structural complexity is high, which easily causes uneven load bearing of parts. These factors all put higher requirements on the reliability of the locking mechanism. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a thin-type load-sharing hatch locking mechanism, which reduces the unevenness of the load bearing of the mechanism parts and improves the reliability of the locking mechanism.

[0005] The specific technical solution of the present invention is as follows:

[0006] A thin-type load-sharing hatch locking mechanism, characterized in that it includes an active end 1-0 and a passive end 2-0;

[0007] The active end 1-0 includes a locking hook 1-01, an eccentric shaft assembly, a sector worm gear assembly, an active housing, a reducer 1-10, a motor 1-20, and a position sensor 1-30;

[0008] The eccentric shaft assembly is used to connect the active housing and the locking hook 1-01; the sector worm gear assembly is used to transmit power and is connected to the reducer 1-10, the motor 1-20, and the eccentric shaft assembly; the active housing is used to support and limit the sector worm gear assembly, the eccentric shaft assembly, the locking hook 1-01, the reducer 1-10, and the motor 1-20; the position sensor 1-30 is used to monitor the position information of the sector worm gear in the locking / unlocking state;

[0009] The passive end 2-0 is used to cooperate with the locking hook 1-01 to complete the locking / unlocking task.

[0010] Further, the eccentric shaft assembly includes an eccentric shaft 1-02, an eccentric shaft sleeve 1-012, an eccentric shaft bushing 1-013, a lining 1-014, and a stop block 1-07;

[0011] The eccentric shaft 1-02 includes a large-diameter part and a small-diameter part; the large-diameter part is the center; the small-diameter part is the rotating shaft, which is installed on the active housing by means of the eccentric shaft sleeve 1-013, with a certain axial clearance reserved on both sides of the active housing; the eccentric shaft sleeve can rotate around the axis of the small-diameter part,

[0012] The stop block 1-07 passes through and is installed on the rotating shaft of the eccentric shaft 1-02 to limit the axial swing of the locking hook 1-01.

[0013] Furthermore, the active housing includes a bearing baffle 1-06, a bearing 1-09, a positioning pin 1-017, an active housing A 1-04, and an active housing B 1-05;

[0014] The active housing A 1-04 and the active housing B 1-05 are symmetrical structures and are connected into one body by means of two positioning pins 1-017;

[0015] The bearing baffle 1-06 is installed on the active housing to limit the axial movement of the sector worm gear assembly.

[0016] Furthermore, the sector worm gear assembly includes a worm 1-08, a sector worm wheel 1-03, a worm wheel shaft sleeve 1-015, a crankshaft 1-011, and a crankshaft shaft sleeve 1-016;

[0017] The sector worm wheel 1-03 is of a hollow type, provided with crankshaft mounting holes distributed radially, and the two sides at the center of the circle are its rotating shafts. It is installed on the active housing through the worm wheel shaft sleeve 1-015, with a certain axial clearance reserved between it and the active housing, and forms a meshing relationship with the worm 1-08; due to the limiting effect of the active housing, the sector worm wheel can only rotate 90° around its rotating shaft;

[0018] The crankshaft 1-011 is press-fitted on the sector worm gear 1-03;

[0019] The worm 1-08 is of a stepped type, including a large-step part 1-081 and a small-step part 1-082; both ends of the large-step part 1-081 are installed on the active housing through the bearing 1-09; the small-step part 1-082 is connected to the reducer 1-10;

[0020] The reducer 1-10 is connected to the motor 1-20 to drive the worm 1-08 to rotate.

[0021] Furthermore, the locking hook 1-01 is connected to the eccentric shaft 1-02 through the eccentric shaft sleeve 1-012, installed on the crankshaft 1-011 through the crankshaft shaft sleeve 1-016, and there is a certain axial clearance reserved between the crankshaft shaft sleeve 1-016 and the sector worm wheel 1-03;

[0022] The locking hook 1-01 rotates in a plane around the crankshaft 1-011 and the eccentric shaft 1-02.

[0023] Furthermore, there are two position sensors 1-30, which are installed on the active housing A1-04; one position sensor is installed at the contact position between the active housing A and the end face of the sector worm gear in the locked state, and the other position sensor is installed at the contact position between the active housing A and the end face of the sector worm gear in the unlocked state;

[0024] The position sensor 1-30 includes a fixed sensor body 1-31 and a movable sensor contact 1-32; after the movable sensor contact 1-32 is pressed in, a signal is given to control the motor 1-20 to stop.

[0025] Furthermore, the passive end 2-0 includes a passive bracket 2-01, a shaft sleeve 2-04, a pull rod 2-05, a sliding lining 2-07, and a split pin 2-08;

[0026] A latch bracket 2-02, a latch shaft 2-03, and a disc spring group 2-06 are installed on the passive bracket 2-01;

[0027] The passive bracket 2-01 is provided with a latch shaft hole; the latch shaft 2-03 makes a limited movement in the latch shaft hole;

[0028] The latch bracket 2-02 is connected to the disc spring group 2-06 through the pull rod 2-05. When the latch bracket 2-02 moves away from the passive bracket 2-01, the disc spring group 2-06 is compressed.

[0029] The shaft sleeve 2-04 is installed on the latch shaft 2-03 and can rotate relative to the latch shaft 2-03, thereby reducing the friction force between the latch shaft 2-03 and the locking hook 1-01;

[0030] The sliding lining 2-07 passes through the latch shaft 2-03 and is installed between the latch bracket 2-02 and the passive bracket 2-01 to reduce the friction force during sliding between the two.

[0031] Furthermore, by adjusting the initial pre-tightening force of the disc spring group 2-06 and the compression amount of the disc spring group 2-06 during the movement of the locking hook 1-01, the magnitude of the locking force is adjusted; the locking force is the sum of the initial pre-tightening force of the disc spring group 2-06 and the pressure generated by the disc spring group 2-06 during the movement of the locking hook 1-01.

[0032] Furthermore, when the locking mechanism is locked, the sector worm gear 1-03 and the active housing reach mechanical limit, and the axes of the sector worm gear 1-03 and the crankshaft 1-11 are on the same straight line; the moment of the external load on the sector worm gear 1-03 is always zero, forming structural self-locking.

[0033] Furthermore, the eccentric shaft sleeve 1-012, eccentric shaft bushing 1-013, lining 1-014, worm gear shaft sleeve 1-015, crankshaft bushing 1-016, and sliding lining 2-07 are all made of self-lubricating and wear-resistant materials, reducing the frictional force between parts during relative movement.

[0034] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0035] (1) The present invention uses a sector-shaped worm gear to replace the crank, arranges the locking hook inside the worm gear, adopts an overall symmetrical layout, and transmits torque through the worm and worm gear within the central plane of the mechanism. The structure is compact, effectively reducing the width dimension of the mechanism; at the same time, the parts are symmetrically loaded relative to the central plane, ensuring the uniformity of load transmission.

[0036] (2) The locking mechanism of the present invention utilizes the self-locking property of worm drive and the dead point characteristic of the four-bar mechanism to achieve double self-locking of the mechanism, ensuring reliable locking after power failure.

[0037] (3) The passive end of the locking mechanism of the present invention uses a disc spring to provide the initial locking force. By adjusting the compression amount of the disc spring, the locking holding force of the locking mechanism can be precisely adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1 Structural diagram of the unlocking state of the thin-type load-sharing locking mechanism according to an embodiment of the present invention;

[0040] Figure 2 Structural diagram of the locking state of the thin-type load-sharing locking mechanism according to an embodiment of the present invention;

[0041] Figure 3 Internal structural diagram of the locking state of the thin-type load-sharing locking mechanism according to an embodiment of the present invention

[0042] Figure 4 Front view of the locking state of the thin-type load-sharing locking mechanism according to an embodiment of the present invention;

[0043] Figure 5 Side sectional view of the locking state of the thin-type load-sharing locking mechanism according to an embodiment of the present invention.

[0044] Explanation of reference numerals in the drawings:

[0045] 1-0 is the active end; 1-10 is the speed reducer; 1-20 is the motor; 1-30 is the position sensor; 1-31 is the sensor body; 1-32 is the sensor contact; 1-01 is the locking hook; 1-02 is the eccentric shaft; 1-03 is the sector worm gear; 1-04 is the active housing A; 1-05 is the active housing B; 1-06 is the bearing baffle; 1-07 is the stop block; 1-08 is the worm; 1-081 is the large stepped part; 1-082 is the small stepped part; 1-09 is the bearing; 1-011 is the crankshaft; 1-012 is the eccentric shaft sleeve; 1-013 is the eccentric shaft bushing; 1-014 is the lining; 1-015 is the worm shaft sleeve; 1-016 is the crankshaft bushing; 1-017 is the positioning pin; 2-0 is the passive end; 2-01 is the passive bracket; 2-02 is the latch bracket; 2-03 is the latch shaft; 2-04 is the shaft sleeve; 2-05 is the pull rod; 2-06 is the disc spring group; 2-07 is the sliding lining; 2-08 is the split pin. Detailed implementation mode

[0046] The following uses specific specific examples to illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0047] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0048] The following combines the attached Figures 1-5 A further detailed description of the present invention is as follows:

[0049] Figure 1 It is a structural diagram of the unlocking state of the thin-type load-sharing locking mechanism of an example of the present invention. As Figure 1 shown, the thin-type load-sharing hatch locking mechanism of the present invention includes an active end 1-0 and a passive end 2-0.

[0050] The active end 1-0 includes a locking hook 1-01, an eccentric shaft assembly, a sector worm gear assembly, an active housing, a speed reducer 1-10, a motor 1-20, and a position sensor 1-30;

[0051] The eccentric shaft assembly is used to connect the active housing and the locking hook 1-01;

[0052] The sector worm gear assembly is used for power transmission and is connected to the reducer 1-10, the motor 1-20, and the eccentric shaft assembly;

[0053] The active housing is used to support and limit the sector worm gear assembly, the eccentric shaft assembly, the locking hook 1-01, the reducer 1-10, and the motor 1-20;

[0054] The position sensor 1-30 is used to monitor the position information of the sector worm gear in the locked / unlocked state.

[0055] The passive end 2-0 is used to cooperate with the locking hook 1-01 to complete the locking / unlocking task.

[0056] Figure 2 It is the locking state structure diagram of the thin-type load-sharing locking mechanism according to an embodiment of the present invention; Figure 3 It is the internal structure diagram of the thin-type load-sharing locking mechanism in the locking state according to an embodiment of the present invention. As Figure 2 、 Figure 3 shown, the eccentric shaft assembly includes an eccentric shaft 1-02, an eccentric shaft sleeve 1-012, an eccentric shaft bushing 1-013, a lining 1-014, and a stop block 1-07;

[0057] The eccentric shaft 1-02 includes a large-diameter part and a small-diameter part; the large-diameter part is the center; the small-diameter part is the rotating shaft, which is installed on the active housing by means of the eccentric shaft bushing 1-013, symmetrically distributed on both sides, and there is a certain axial clearance between the two sides and the active housing; the eccentric shaft bushing 1-013 can rotate around the axis of the small-diameter part.

[0058] The stop block 1-07 passes through and is installed on the rotating shaft of the eccentric shaft 1-02 to limit the axial swing of the locking hook 1-01.

[0059] The active housing includes a bearing baffle 1-06, a bearing 1-09, a positioning pin 1-017, an active housing A 1-04, and an active housing B 1-05;

[0060] The active housing A 1-04 and the active housing B 1-05 are symmetrical structures and are connected into one body by means of two positioning pins 1-017;

[0061] The bearing baffle 1-06 is installed on the active housing to limit the axial movement of the worm 1-08, thereby limiting the axial movement of the sector worm gear assembly.

[0062] Figure 4 It is the front view of the thin-type load-sharing locking mechanism in the locking state according to an embodiment of the present invention; Figure 5 It is the side sectional view of the thin-type load-sharing locking mechanism in the locking state according to an embodiment of the present invention. As Figure 3 、 Figure 4 、 Figure 5As shown, the sector worm gear assembly includes a worm 1-08, a sector worm gear 1-03, a worm gear shaft sleeve 1-015, a crankshaft 1-011, and a crankshaft shaft sleeve 1-016;

[0063] The sector worm gear 1-03 is hollow and is provided with radially distributed crankshaft mounting holes. The centers of both sides are its rotating shafts. It is installed on the active housing through the worm gear shaft sleeve 1-015 and a certain axial clearance is reserved between it and the active housing. It forms a meshing relationship with the worm 1-08. Due to the restrictive effect of the active housing, the sector worm gear 1-03 can only rotate 90° around its rotating shaft;

[0064] The sector worm gear 1-03 is provided with radially distributed crankshaft mounting holes for installing the crankshaft 1-011. The crankshaft 1-011 is press-fitted on the sector worm gear 1-03. Due to the position limitation on both sides of the active housing, the crankshaft 1-011 still cannot axially move out after loosening, and the press-fitting installation has high reliability;

[0065] As Figure 3 shown, the worm 1-08 is stepped and includes a large step part 1-081 and a small step part 1-082. Both ends of the large step part 1-081 are installed on the active housing through bearings 1-09. The small step part 1-082 is connected to the reducer 1-10;

[0066] The reducer 1-10 is connected to the motor 1-20 to drive the worm 1-08 to rotate.

[0067] As Figure 5 shown, the locking hook 1-01 is connected to the eccentric shaft 1-02 through the eccentric shaft sleeve 1-012, and is installed on the crankshaft 1-011 through the crankshaft shaft sleeve 1-016, using the certain axial clearance reserved between the crankshaft shaft sleeve 1-016 and the sector worm gear 1-03;

[0068] The locking hook 1-01 can rotate in a plane around the crankshaft 1-011 and the eccentric shaft 1-02.

[0069] As Figure 1 、 Figure 4 shown, there are two position sensors 1-30, which are installed on the active housing A1-04. One of the position sensors 1-30 is installed at the contact position between the active housing A1-04 and the end face of the sector worm gear 1-03 in the locked state, and the other position sensor 1-30 is installed at the contact position between the active housing A1-04 and the end face of the sector worm gear 1-03 in the unlocked state;

[0070] As Figure 4As shown, the position sensor 1-30 includes a fixed sensor body 1-31 and a movable sensor contact 1-32; when the movable sensor contact 1-32 is pressed in, a signal is given to control the motor 1-20 to stop.

[0071] As Figure 2 , Figure 3 shown, the passive end 2-0 includes a passive bracket 2-01, a shaft sleeve 2-04, a pull rod 2-05, a sliding liner 2-07, and a split pin 2-08;

[0072] A latch bracket 2-02, a latch shaft 2-03, and a disc spring group 2-06 are installed on the passive bracket 2-01;

[0073] The passive bracket 2-01 is provided with a latch shaft hole; the latch shaft 2-03 makes a limited movement in the latch shaft hole;

[0074] The latch bracket 2-02 is installed on the passive bracket 2-01 through the latch shaft 2-03, a gasket (standard part), and a split pin 2-08, and is connected to the disc spring group 2-06 through a pull rod 2-05, a gasket (standard part), and a nut (standard part); when the latch bracket 2-02 moves away from the passive bracket 2-01, the disc spring group 2-06 is compressed.

[0075] The shaft sleeve 2-04 is installed on the latch shaft 2-03 and can rotate relative to the latch shaft 2-03, thereby reducing the friction force between the latch shaft 2-03 and the lock hook 1-01.

[0076] The sliding liner 2-07 passes through the latch shaft 2-03 and is installed between the latch bracket 2-02 and the passive bracket 2-01 to reduce the friction force during sliding between the two.

[0077] By adjusting the initial pre-tightening force of the disc spring group 2-06 and the compression amount of the disc spring group 2-06 during the movement of the lock hook 1-01, the magnitude of the locking force can be accurately adjusted; the locking force is the sum of the initial pre-tightening force of the disc spring group 2-06 and the pressure generated by the disc spring group 2-06 during the movement of the lock hook 1-01.

[0078] As Figure 2 , Figure 3 shown, when the locking mechanism is locked, the sector worm wheel 1-03 and the active housing reach mechanical limit, the centers of the latch shaft 2-03, the sector worm wheel 1-03, and the crankshaft 1-11 are on the same straight line, and the moment of the external load on the sector worm wheel 1-03 is always zero, forming structural self-locking.

[0079] The eccentric shaft sleeve 1-012, eccentric shaft bushing 1-013, lining 1-014, worm gear shaft sleeve 1-015, crankshaft bushing 1-016, and sliding lining 2-07 are all self-lubricating wear-resistant materials, reducing the frictional force between parts during relative movement.

[0080] The operating principle of the thin-type load-sharing hatch locking mechanism of the present invention is as follows:

[0081] As Figure 2 、 Figure 3 shown, when the locking mechanism is locked, the motor 1-20 drives the worm 1-08 to rotate through the reducer 1-10, driving the sector worm gear 1-03 to rotate, thereby causing the lock hook 1-01 to start moving, capturing and pulling in the latch shaft 2-03; when the passive bracket 2-01 reaches the limit position relative to the active end 1-0, the latch bracket 2-02 starts to move, and at this time the disc spring group 2-06 is compressed; when the sector worm gear 1-03 reaches the mechanical limit with the active housing, the position sensor 1-30 is triggered, giving a signal indicating that the locking is in place, and the motor 1-20 stops rotating; at this time, the axes of the latch shaft 2-03, the sector worm gear 1-03, and the crankshaft 1-11 are on a straight line, and the active end 1-0 forms a structural self-locking, and at the same time the disc spring group 2-06 is compressed in place; due to the self-locking property of the worm and worm gear transmission, the structure of the active end 1-0 forms a double self-locking; the locking force is the initial pre-tightening force of the disc spring group 2-06 plus the pressure generated by the disc spring group 2-06 during the movement of the lock hook 1-01; by adjusting the initial pre-tightening force of the disc spring group 2-06 and the compression amount of the disc spring group 2-06 during the movement of the lock hook 1-01, the locking holding force of the locking mechanism can be accurately adjusted.

[0082] As Figure 1 shown, when the locking mechanism is unlocked, the motor 1-20 rotates in the reverse direction to drive the lock hook 1-01 to move; when the sector worm gear 1-03 reaches the mechanical limit with the housing, the position sensor 1-30 is triggered, giving a signal indicating that the unlocking is in place, and the motor 1-20 stops rotating.

[0083] In the present invention, the lock hook is arranged inside the sector worm gear, with a compact structure; secondly, by utilizing the self-locking property of the worm and worm gear transmission and the dead point characteristic of the four-bar mechanism, double self-locking of the mechanism is achieved; finally, the passive end uses disc springs to provide the initial locking force, and the locking holding force of the locking mechanism can be accurately adjusted.

[0084] Although the present invention has been disclosed above with preferred embodiments, it does not limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention without departing from the spirit and scope of the present invention. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention all fall within the protection scope of the technical solution of the present invention.

[0085] It should be noted that the above is only a schematic description and elaboration of the present invention. Those skilled in the art should understand that any modification and replacement of the present invention fall within the protection scope of the present invention.

Claims

1. A thin load-balancing door locking mechanism, characterized in that: Contains active end (1-0) and passive end (2-0); The active end (1-0) comprises a lock hook (1-01), an eccentric shaft assembly, a fan-shaped worm gear assembly, an active housing, a reducer (1-10), a motor (1-20), and a position sensor (1-30); The eccentric shaft assembly is used to connect the active housing and the lock hook (1-01); the fan-shaped worm gear assembly is used to transmit power and is connected to the reducer (1-10), the motor (1-20), and the eccentric shaft assembly; the active housing is used to support and limit the fan-shaped worm gear assembly, the eccentric shaft assembly, the lock hook (1-01), the reducer (1-10), and the motor (1-20); the position sensor (1-30) is used to monitor the position information of the fan-shaped worm gear in the locked / unlocked state; The passive end (2-0) is used to cooperate with the lock hook (1-01) to complete the locking / unlocking task.

2. A thin load-balancing door locking mechanism as claimed in claim 1, characterized in that: The eccentric shaft assembly comprises an eccentric shaft (1-02), an eccentric shaft sleeve (1-012), an eccentric shaft sleeve (1-013), a lining (1-014), and a stopper (1-07); The eccentric shaft (1-02) comprises a large diameter part and a small diameter part; the large diameter part is the center; the small diameter part is the rotating shaft, which is installed on the active housing with the help of an eccentric shaft sleeve (1-013), and a certain axial clearance is retained between the two sides of the active housing; the eccentric shaft sleeve can rotate around the axis of the small diameter part, The stopper (1-07) passes through and is installed on the rotating shaft of the eccentric shaft (1-02) to limit the axial swing of the locking hook (1-01).

3. A thin load-balancing door locking mechanism as claimed in claim 1, characterized in that: The active housing comprises a bearing baffle (1-06), a bearing (1-09), a positioning pin (1-017), an active housing A (1-04) and an active housing B (1-05); The active housing A (1-04) and the active housing B (1-05) are symmetrical structures and are connected as a whole by means of two positioning pins (1-017); The bearing baffle (1-06) is installed on the active housing and is used to limit the axial movement of the fan-shaped worm gear assembly.

4. A thin load-balancing door locking mechanism as claimed in claim 1, characterized in that: The fan-shaped worm gear assembly comprises a worm (1-08), a fan-shaped worm gear (1-03), a worm gear sleeve (1-015), a crank shaft (1-011), and a crank shaft sleeve (1-016); The fan-shaped worm wheel (1-03) is hollow and provided with radially distributed crankshaft mounting holes. The centers of the two sides are its rotating shafts. It is installed on the active housing through the worm wheel sleeve (1-015) and retains a certain axial clearance with the active housing to form a meshing relationship with the worm (1-08). Due to the limiting effect of the active housing, the fan-shaped worm wheel can only perform 90° rotational movement around its rotating shaft. The crankshaft (1-011) is interference-mounted on the fan-shaped turbine (1-03); The worm (1-08) is of stepped type, comprising a large step portion (1-081) and a small step portion (1-082); both ends of the large step portion (1-081) are mounted on the active housing via bearings (1-09); the small step portion (1-082) is connected to the reducer (1-10); The reducer (1-10) is connected to the motor (1-20) to drive the worm (1-08) to perform rotational motion.

5. A thin load-balancing door locking mechanism as claimed in claim 1, characterized in that: The locking hook (1-01) is connected to the eccentric shaft (1-02) through an eccentric shaft sleeve (1-012), and is installed on the crank shaft (1-011) through a crank shaft sleeve (1-016), and a certain axial clearance is reserved between the crank shaft sleeve (1-016) and the fan-shaped worm gear (1-03); The locking hook (1-01) performs planar rotation around the crank shaft (1-011) and the eccentric shaft (1-02).

6. A thin load-balancing door locking mechanism as claimed in claim 1, characterized in that: There are two position sensors (1-30) installed on the active housing A (1-04); one of the position sensors is installed at the contact position between the active housing A and the end face of the fan-shaped worm gear in a locked state, and the other position sensor is installed at the contact position between the active housing A and the end face of the fan-shaped worm gear in an unlocked state; The position sensor (1-30) comprises a fixed sensor body (1-31) and a movable sensor contact (1-32); the movable sensor contact (1-32) gives a signal after being pressed in, thereby controlling the motor (1-20) to stop.

7. A thin load-balancing door locking mechanism as claimed in claim 1, characterized in that: The passive end (2-0) comprises a passive bracket (2-01), a shaft sleeve (2-04), a pull rod (2-05), a sliding lining (2-07), and a cotter pin (2-08); The passive bracket (2-01) is equipped with a latch bracket (2-02), a latch shaft (2-03), and a disc spring assembly (2-06); The passive bracket (2-01) is provided with a latch shaft hole; the latch shaft (2-03) makes limited movement in the latch shaft hole; The latch bracket (2-02) is connected to the disc spring assembly (2-06) via a pull rod (2-05); when the latch bracket (2-02) moves away from the passive bracket (2-01), the disc spring assembly (2-06) is compressed. The shaft sleeve (2-04) is mounted on the latch shaft (2-03) and can rotate relative to the latch shaft (2-03), thereby reducing the friction between the latch shaft (2-03) and the lock hook (1-01); The sliding lining (2-07) passes through the latch shaft (2-03) and is installed between the latch bracket (2-02) and the passive bracket (2-01) to reduce the sliding friction between the two.

8. A thin load-balancing door locking mechanism as claimed in claim 7, characterized in that: The locking force is adjusted by adjusting the initial preload of the disc spring group (2-06) and the amount of compression of the disc spring group (2-06) during the movement of the lock hook (1-01); the locking force is the initial preload of the disc spring group (2-06) plus the pressure generated by the disc spring group (2-06) during the movement of the lock hook (1-01).

9. A thin load-balancing door locking mechanism as claimed in claim 4, characterized in that: When the locking mechanism is locked, the fan-shaped worm gear (1-03) and the active housing reach a mechanical limit, the axis of the fan-shaped worm gear (1-03) and the axis of the crank shaft (1-11) are located on a straight line; the torque of the external load on the fan-shaped worm gear (1-03) is always zero, forming a self-locking structure.

10. A thin load-balancing door locking mechanism as claimed in any one of claims 2 to 7, characterized in that: The eccentric shaft sleeve (1-012), the eccentric shaft sleeve (1-013), the lining (1-014), the worm shaft sleeve (1-015), the crank shaft sleeve (1-016), and the sliding lining (2-07) are all made of self-lubricating and wear-resistant materials, thereby reducing the friction force of relative movement between the parts.

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