A multi-point synchronous locking device

Abstract

The object of the present invention is to overcome the deficiencies of the prior art and provide a multi-point synchronous locking device with adjustable locking force and uniform distribution of locking force. It includes a hatch door and a base. A locking ring is provided on the base, and a plurality of locking grooves are evenly arranged along the circumference of the locking ring. The bottom of each locking groove is a first locking inclined surface. The hatch door includes a hatch door body. A sealing rubber strip is provided on the hatch door body corresponding to the locking ring. A plurality of lock bar grooves are arranged radially on the hatch door body corresponding to the locking grooves. A lock bar is slidably fitted in each lock bar groove respectively. One end of the lock bar is provided with a lock bar shaft, and a second locking inclined surface is provided at the other end of the lock bar. A small gear and a large gear that are meshed with each other are installed on the hatch door body. A plurality of arc-shaped grooves are provided on the large gear corresponding to the lock bar shafts, and the lock bar shafts are fitted in the corresponding arc-shaped grooves. It further includes a rotating handle, and the rotating handle includes a handle seat. One end of the handle seat is connected to the small gear, and the other end of the handle seat is provided with a hollow lock pin seat.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical structures of cabin doors, and particularly to a multi-point synchronous locking device. Background Art

[0002] Mechanical structures of cabin doors for opening and closing have very wide engineering applications. Such cabin doors need to be convenient to open or close during actual use, and be reliably locked when closed. Some require sealing when the cabin door is closed and locked. For example Figure 1 A device for opening, closing and locking a cabin door currently in use. The cabin door uses a handle to make the lock hook ring hook the lock hook installed on the base, and realizes the locking of the cabin door through the eccentric rotation and pressing on the handle. This type of locking method has the following problems or defects:

[0003] a. Within the 360° range of the cabin door, only single-point locking is used, and the locking force is unevenly distributed.

[0004] b. Due to the uneven distribution of the locking force, the sealing performance of the cabin door is poor (the cabin door presses the sealing ring through the locking pressure).

[0005] c. The single-point locking method has low locking strength. When the cabin door is subjected to a large impact, the locking device may be damaged and fail.

[0006] d. The locking force is not adjustable. Summary of the Invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a multi-point synchronous locking device with adjustable locking force, evenly distributed locking force, and improved locking reliability.

[0008] The purpose of the present invention is achieved as follows:

[0009] A multi-point synchronous locking device, including a cabin door (1) and a base (2), wherein the cabin door (1) is connected to the base (2) through a hinge (3), and is characterized in that:

[0010] A locking ring (4) is provided on the base (2), and a plurality of locking grooves (6) are evenly arranged along the circumference on the locking ring (4), and the bottom of each locking groove (6) is a first locking inclined surface (7).

[0011] The hatch door (1) includes a hatch door body (8). A sealing strip (9) is provided on the hatch door body (8) corresponding to the locking ring (4). The first locking inclined surface (7) faces away from the sealing strip (9). A plurality of locking bar grooves (10) are arranged radially on the hatch door body (8) corresponding to the locking grooves (6). A locking bar (11) is slidably fitted in each locking bar groove (10). One end of the locking bar (11) is provided with a locking bar shaft (39), and a second locking inclined surface (45) is provided at the other end of the locking bar (38). A meshing pinion (12) and a large gear (13) are installed on the hatch door body (8). The large gear (13) is located at the central part of the hatch door body (8). The plurality of locking bar grooves (10) are evenly distributed around the large gear (13). A plurality of arc-shaped grooves (28) are provided on the large gear (13) corresponding to the locking bar shafts (39). The locking bar shafts (39) are fitted in the corresponding arc-shaped grooves (28). It further includes a rotating handle (14). The rotating handle (14) includes a handle base (31). One end of the handle base (31) is connected to the pinion (12), and the other end of the handle base (31) is provided with a hollow locking pin seat (32). The handle base (31) is used to drive the pinion (12) to rotate. The pinion (12) drives the large gear (13) to rotate. The large gear (13) drives the locking bar (11) to slide along the locking bar groove (10) through the arc-shaped groove (28). After one end of the locking bar (11) enters the locking groove (6), the second locking inclined surface (45) on the locking bar (11) cooperates with the first locking inclined surface (7) on the locking ring (4) to tightly press the locking ring (4). The locking ring (4) is used to tightly press the sealing strip (9).

[0012] A locking pin (29) is fitted in the inner hole of the locking pin seat (32). An angular limit groove (15) is provided on the hatch door body (8) corresponding to the locking pin (29). A plurality of locking holes (17) are provided in the angular limit groove (15). The locking pin (29) is used to extend into the locking holes (17) to lock the position of the rotating handle (14). The locking holes (17) at both ends of the angular limit groove (15) correspond to the state where the locking bar (11) disengages from the locking groove (6) and the state where the locking bar (11) has the maximum pressing force on the locking ring (4). The remaining locking holes (17) are used to adjust the locking pressing force.

[0013] Preferably, a handle (33) with a hollow structure is sleeved on the lock pin seat (32). The lock pin seat (32) and the handle (33) are in sliding fit. A bushing and a compression spring (30) are arranged in the inner hole of the lock pin seat (32). The lock pin (29) is stepped. The large end of the lock pin (29) is the locking end. The compression spring (30) is sleeved on the small end of the lock pin (29). The two ends of the compression spring (30) are respectively in contact with the shoulder of the lock pin (29) and the bushing. The small end of the lock pin (29) is fixed on the end wall of the handle (33). The compression spring (30) prevents the lock pin (29) from disengaging from the locking hole (17). The handle (33) is used to pull out the lock pin (29) and drive the pinion gear (12).

[0014] Preferably, the lock bar groove (10) includes a lock bar groove seat (34) and a lock bar groove seat cover plate (35). Cylindrical rollers (36) are arranged on the lock bar groove seat (34) and the lock bar groove seat cover plate (35). A first needle roller bearing (37) is installed on the lock bar groove seat (34). A limit groove (44) is arranged on the lock bar (38). The needle roller bearing (3) is fitted in the limit groove (44). The cylindrical rollers (36) and the needle roller bearing (3) are used to guide the lock bar (38). A second needle roller bearing (42) is installed on the lock bar shaft (39). The second needle roller bearing (42) is fitted with the corresponding arc groove (28).

[0015] Preferably, the two end positions of the arc groove (28) respectively correspond to the state where the lock bar (11) disengages from the locking groove (6) and the state where the lock bar (11) applies the maximum pressing force to the pressing locking ring (4).

[0016] Due to the adoption of the above technical solutions, the present invention has the following beneficial effects:

[0017] a. Multi-point synchronous locking is achieved within the range of 360° of the cabin door.

[0018] b. The locking force is adjustable.

[0019] c. The locking force is evenly distributed, improving the reliability of locking.

[0020] d. When the cabin door is locked, the evenly distributed pressing force presses the sealing strip to ensure the sealing effect of the cabin door.

[0021] e. Multi-point synchronous locking makes the locking mechanism stronger. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the prior art;

[0023] Figure 2 is a schematic structural diagram of the present invention;

[0024] Figure 3 is a schematic structural diagram of the base;

[0025] Figure 4 It is a schematic structural diagram of the locking ring;

[0026] Figure 5 It is a schematic structural diagram of the hatch door;

[0027] Figure 6 It is a schematic structural diagram of the connection between the pinion gear and the large gear and the hatch door body;

[0028] Figure 7 It is a schematic structural diagram of the rotating handle;

[0029] Figure 8 It is a schematic structural diagram of the lock bar groove;

[0030] Figure 9 It is a schematic structural diagram of the lock bar;

[0031] Figure 10 It is a schematic structural diagram of the connection between the lock bar groove, the lock bar and the large gear 13;

[0032] Figure 11 It is a schematic working diagram of the present invention;

[0033] Figure 12 It is a schematic locking diagram of the present invention. Detailed implementation manners

[0034] Refer to Figures 1 - 10 , which is an embodiment of a multi-point synchronous locking device. In the schematic diagram of this patent, it is introduced according to 6 locking points, but the protection points of the patent should not be limited to the specific number of locking points. The overall structure is as Figure 2 shown. The hatch door 1 (inward-opening type) is connected through two groups of hinges 3 and a base 2 to realize the rotation of the hatch door 1 when opening and closing.

[0035] The structure of the base 2 is as Figure 3 shown. A locking ring 4 is provided thereon, and the locking ring is fixed to the base by 5 screws. Six groups (the number corresponds to the locking points) of locking grooves 6 are evenly distributed in the 360° direction on the locking ring 4.

[0036] The structural form of the locking ring 4 is as Figure 4 shown. Six groups of locking grooves 6 are provided thereon, and a first locking inclined surface 7 is provided at each locking groove 6.

[0037] The structural form of the hatch door 1 is as Figure 5As shown in the figure. The hatch body 8 serves as the installation base for the components on the hatch 1, and a sealing strip 9 is provided thereon. The sealing strip is connected to the hatch body 8 by an adhesive bonding method. Six groups of lock strip grooves 10 are provided, and the lock strip grooves 10 are connected to the hatch body 8 by screws 18. Six groups of lock strips 11 are provided, and the connection method of the lock strips 11 with other components will be described later. A set of mating pinion 12 and large gear 13 are provided. A set of turning handle 14 is provided, and the turning handle 14 is connected to the pinion 12 by a screw 21. An angle limit groove 15 is provided, and it is connected to the hatch body 8 by a screw 19. The two sets of locking holes 17 provided can be fixed at any position within the range defined by the angle limit groove 15 through a lock nut 16 and a screw 20.

[0038] The connection method of the pinion 12 and the large gear 13 with the hatch body 8 is as Figure 6 shown. The pinion shaft 22 is connected to the hatch body 8 by a screw 24, and the pinion 12 is mounted on the pinion shaft 22 through a bearing 23. The large gear shaft 25 is connected to the hatch body 8 by a screw 27, and the large gear 13 is mounted on the large gear shaft 25 through a bearing 26. Six groups of arc-shaped grooves 28 are evenly provided on the large gear.

[0039] The structural form of the turning handle 14 is as Figure 7 shown. It mainly consists of a lock pin 29, a compression spring 30, a handle seat 31, a lock pin seat 32, and a handle 33. When in the open state, the front end face of the lock pin 29 does not protrude from the lock pin seat 32; when in the locked state, the front end face of the lock pin 29 protrudes from the lock pin seat 32 by a distance A. At this time, the protruding distance A is inserted into the locking hole 17, and is pressed tightly by the compression spring 30 to prevent the lock pin 29 from withdrawing from the locking hole 17.

[0040] The structural form of the lock strip groove 10 is as Figure 8 shown. The lock strip groove seat 34 and the lock strip groove seat cover plate 35 are provided with limit grooves for limiting the cylindrical roller 36, and the lock strip groove seat 34 is provided with mounting holes for mounting the first needle bearing 37. Both the cylindrical roller 36 and the first needle bearing 37 are used to limit the movement of the lock strip and reduce the friction during the movement process.

[0041] The structural form of the lock strip 11 is as Figure 9 shown. The lock strip shaft 42 is fixedly connected to the lock strip 38 by a screw 43, the second needle bearing 42 is mounted on the lock strip shaft 39, and is limited by a large washer 41 and a nut 40. The lock strip 38 is provided with a limit groove 44 and a second locking inclined surface 45.

[0042] The connection relationship between the lock strip groove 10 and the lock strip 11 and the large gear 13 is as Figure 10As shown in the figure. The second needle roller bearing 42 in the locking bar 11 is installed in the arc-shaped groove 28 in the large gear 13, and the second needle roller bearing 42 can roll flexibly in the arc-shaped groove 28. The first needle roller bearing 37 in the locking bar groove 10 is installed in the limit groove 44 in the locking bar 11. The upper and lower surfaces of the locking bar are supported and limited by the upper and lower cylindrical rollers 36 in the locking bar groove 10, so that the locking bar 11 can slide flexibly in the locking bar groove 10. The diagrams of the main connection relationships are as shown at A, B, and C in the figure.

[0043] See Figures 11 - 12 , working method:

[0044] As Figure 11 shown, the locking mechanism of the hatch 1 has two states: "open" and "closed". In the open state, the rotating handle 14 is located in the locking hole 17 in the open position. At this time, the locking bar 11 is restricted in the open position through the arc-shaped groove 28 of the large gear 13. When it is necessary to change from the open state to the locked state, after pulling out the locking pin 29 from the locking hole 17 in the open position through the handle 33, the small gear 12 is rotated by rotating the handle 14, thereby driving the large gear 13 to rotate. Driven by the arc-shaped groove 28 of the large gear 13, six groups of locking bars 11 are forced to slide synchronously in six groups of locking bar grooves 10 and extend until the locking position. At this time, insert the locking pin 29 into the locking hole 17 in the locking position, thereby restricting the rotation of the small gear 12 to achieve the purpose of locking. When it is necessary to change from the locked state to the open state, only need to rotate the handle 33 in the opposite direction according to the above steps.

[0045] When the six groups of locking bars 11 are synchronously extending, their front ends will gradually enter the six groups of locking grooves 6 corresponding to the locking ring 4. The second locking inclined surface 45 on the locking bar 38 contacts the six groups of first locking inclined surfaces 7 on the locking ring 4 as the locking bar 11 gradually enters. As the locking bar 11 extends, the contact area gradually increases, and the pressing force between the two is greater, thereby forcing the sealing strip 9 on the hatch 1 to closely fit the locking ring 4, ensuring a good sealing effect and also ensuring the reliable locking of the hatch 1, as Figure 12 shown.

[0046] By adjusting the position of the locking hole 17 in the locking position in the angular limit groove 15, the extension amount of the locking bar 11 can be controlled, and then the contact area between the first locking inclined surface 7 and the second locking inclined surface 45 can be adjusted, thereby adjusting the contact pressure between the two to achieve the adjustment of the locking force.

[0047] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A multi-point synchronous locking device, comprising a hatch door (1) and a base (2), wherein the hatch door (1) is connected to the base (2) through a hinge (3), and is characterized in that: A locking ring (4) is arranged on the base (2), and a plurality of locking grooves (6) are evenly arranged on the locking ring (4) along the circumferential direction. The bottom of each locking groove (6) is a first locking inclined surface (7). The hatch door (1) includes a hatch door body (8). A sealing rubber strip (9) is arranged on the hatch door body (8) corresponding to the locking ring (4). The first locking inclined surface (7) faces away from the sealing rubber strip (9). A plurality of lock bar grooves (10) are arranged on the hatch door body (8) corresponding to the locking grooves (6) along the radial direction. A lock bar (38) is slidably fitted in each lock bar groove (10). One end of the lock bar (38) is provided with a lock bar shaft (39), and the other end of the lock bar (38) is provided with a second locking inclined surface (45). A meshing small gear (12) and large gear (13) are installed on the hatch door body (8). The large gear (13) is located at the central part of the hatch door body (8). A plurality of lock bar grooves (10) are evenly distributed around the large gear (13). A plurality of arc-shaped grooves (28) are arranged on the large gear (13) corresponding to the lock bar shafts (39). The lock bar shafts (39) are fitted in the corresponding arc-shaped grooves (28). A rotating handle (14) is further included. The rotating handle (14) includes a handle seat (31). One end of the handle seat (31) is connected to the small gear (12), and the other end of the handle seat (31) is provided with a hollow lock pin seat (32). The handle seat (31) is used to drive the small gear (12) to rotate. The small gear (12) drives the large gear (13) to rotate. The large gear (13) drives the lock bar (38) to slide along the lock bar groove (10) through the arc-shaped groove (28). After one end of the lock bar (38) enters the locking groove (6), the second locking inclined surface (45) on the lock bar (38) cooperates with the first locking inclined surface (7) on the locking ring (4) to tightly press the locking ring (4). The locking ring (4) is used to tightly press the sealing rubber strip (9). A lock pin (29) is fitted in the inner hole of the lock pin seat (32). An angular limit groove (15) is arranged on the hatch door body (8) corresponding to the lock pin (29). A plurality of locking holes (17) are arranged in the angular limit groove (15). The lock pin (29) is used to extend into the locking holes (17) to lock the position of the rotating handle (14). The locking holes (17) at both ends of the angular limit groove (15) correspond to the state where the lock bar (38) disengages from the locking groove (6) and the state where the lock bar (38) has the maximum pressing force on the locking ring (4). The remaining locking holes (17) are used to adjust the locking pressing force.

2. The multi-point synchronous locking device according to claim 1, wherein: A hollow-structured handle (33) is sleeved on the lock pin seat (32). The lock pin seat (32) and the handle (33) are in sliding fit. A ferrule and a compression spring (30) are arranged in the inner hole of the lock pin seat (32). The lock pin (29) is stepped, and the large end of the lock pin (29) is the locking end. The compression spring (30) is sleeved on the small end of the lock pin (29), and the two ends of the compression spring (30) respectively abut against the shoulder of the lock pin (29) and the ferrule. The small end of the lock pin (29) is fixed on the end wall of the handle (33). The compression spring (30) prevents the lock pin (29) from coming out of the locking hole (17). The handle (33) is used to pull out the lock pin (29) and drive the pinion (12).

3. The multi-point synchronous locking device according to claim 1, characterized in that: The lock bar groove (10) includes a lock bar groove seat (34) and a lock bar groove seat cover plate (35). Cylindrical rollers (36) are arranged on the lock bar groove seat (34) and the lock bar groove seat cover plate (35). A first needle bearing (37) is installed on the lock bar groove seat (34). A limiting groove (44) is arranged on the lock bar (38). The first needle bearing (37) is fitted in the limiting groove (44). The cylindrical rollers (36) and the first needle bearing (37) are used to guide the lock bar (38). A second needle bearing (42) is installed on the lock bar shaft (39), and the second needle bearing (42) is fitted with the corresponding arc-shaped groove (28).

4. A multi-point synchronous locking device according to claim 1, characterized in that: The two end positions of the arc-shaped groove (28) respectively correspond to the state where the lock bar (38) comes out of the locking groove (6) and the state where the lock bar (38) applies the maximum pressing force to the pressing locking ring (4).

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