Multifunctional side door lock based on double-handle control

Abstract

The invention relates to the technical field of rail transit, in particular to a multifunctional side door lock based on double-handle control. A handle I and a twisting handle are arranged on the front face of the lock body box, and a handle II and a lock cylinder are arranged on the back face of the lock body box. An inclined spring bolt, a middle spring bolt and a square spring bolt are arranged in the lock body box and correspond to the lock opening holes in the lock opening respectively; a limiting plate II, a limiting plate I, a transmission plate and a rotating plate are further arranged in the lock body box, and an automatic locking state, a manual unlocking state and a safe locking state are achieved when a door is closed. The double handles and the twisting handle are clear in division of labor, locking and unlocking operation of the inner handle and the outer handle is simple and easy to understand, the twisting handle can restrain or release various lock tongues at a time, and the convenience of using the door lock by a user is greatly improved; the door lock has three states of automatic locking, manual unlocking and safe locking when the door is closed, the requirements for the door lock state in different scenes can be met, and use safety is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit technology, in particular to a multifunctional side door lock based on double-handle control. BACKGROUND

[0002] In the field of existing door lock technology, the traditional side door lock has a single function and is difficult to meet the diversified use requirements of rail transit. To solve this problem, the technical personnel in this field actively explore. For example, Chinese patent publication No. CN118793336A discloses a locking device, system and method for boarding door. However, such designs have the following deficiencies: some door locks need to be manually locked by the user after closing, which is inconvenient to operate and is prone to be unlocked due to negligence, which poses a safety hazard; some door locks with automatic locking function have complex structure design and redundant components, which not only increases the manufacturing cost, but also reduces the reliability and stability, resulting in frequent failures; the operation mode is not user-friendly, and the user has difficulty in quickly and accurately unlocking and locking, which affects the use experience; and the different locking state requirements are not considered, the safety locking function is lacking, and higher level of safety protection cannot be provided. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the deficiencies of the prior art and provide a multifunctional side door lock based on double-handle control.

[0004] The technical solution adopted by the present application is as follows: A multifunctional side door lock based on double-handle control, comprising a lock body box and a lock opening, the front of the lock body box is provided with a handle I and a twist handle, and the back of the lock body box is provided with a handle II and a lock core; the lock body box is internally provided with an inclined lock tongue, a middle lock tongue and a square lock tongue, which correspond to the lock opening holes on the lock opening; the lock body box is further provided with a limiting plate II, a limiting plate I, a transmission plate and a rotating plate, to realize the automatic locking state, the manual unlocking state and the safety locking state when closing the door.

[0005] The technical solution is to reasonably arrange the inclined lock tongue, the middle lock tongue, the square lock tongue, the limiting plate, the transmission plate and the rotating plate in the lock body box, and utilize the connection and cooperation relationship therebetween, such as the engagement of the limiting column and the groove and the clamping groove. Specifically, the inner and outer double handles convert the rotary operation into the extension and retraction actions of the inclined lock tongue and the square lock tongue through the rotor and other components, to realize the opening of the door; the twist handle drives the transmission plate to move, which one-time restricts or releases the inclined lock tongue, the middle lock tongue and the square lock tongue, to complete the locking or unlocking and realize various functional states. The double handles and the twist handle have clear division of labor and simple operation, which greatly improves the convenience of the user in using the door lock.

[0006] In addition, the multifunctional side door lock based on double-handle control according to the present application has the following additional technical features: According to one embodiment of the present application, the bevel lock tongue, the middle lock tongue and the square lock tongue are arranged in the lock body box in sequence from top to bottom; the limiting plate II is arranged between the bevel lock tongue and the middle lock tongue, and the limiting plate II is provided with a limiting contact matched with the middle lock tongue; the limiting plate I is arranged between the middle lock tongue and the square lock tongue, and the limiting plate I is provided with a hook matched with the square lock tongue below; the rotating plate is arranged between the limiting plate II and the limiting plate I, the lower end of the rotating plate is provided with a limiting hole matched with the limiting column of the square lock tongue, the middle part of the rotating plate is provided with a groove matched with the limiting plate I and the limiting plate II, and the top of the rotating plate is provided with a clamping groove matched with the rotor.

[0007] The present technical solution reasonably arranges the three lock tongues, and converts the rotary motion of the twist handle and the rotor into the linear extension and contraction motion of the lock tongues through the mechanical connection and cooperation between the limiting plate, the rotating plate, the rotor and the transmission plate. The rotating plate is connected with the related components through the groove and the clamping groove, so as to realize power transmission and direction conversion; the rotor controls the action of the bevel lock tongue through the action of the bevel lock tongue; the transmission plate connects the twist handle, the rotating plate and the bevel lock tongue, so as to form a complete transmission chain and ensure that the lock tongues act in the set direction. Specifically, the three lock tongues are arranged from top to bottom, which is beneficial to space utilization and function division; the limiting plate accurately controls the extension and contraction range and direction of the lock tongue through the limiting column and the hook, so as to prevent excessive movement or misplacement; the rotating plate converts the rotary motion of the rotor into the linear motion of the lock tongue through the cooperation of the groove, the clamping groove, the limiting plate and the rotor; the rotor realizes the flexible extension and contraction of the bevel lock tongue through the linkage of the bevel lock tongue; the transmission plate connects the twist handle, the rotating plate and the bevel lock tongue, so as to transmit the rotary force of the twist handle through the rotating plate and drive the bevel lock tongue to act, and the movement of the transmission plate is constrained by the limiting column of the rotating plate, so as to ensure that the components cooperate with each other and realize stable opening and closing of the door lock.

[0008] According to one embodiment of the present application, the multifunctional side door lock based on double-handle control has three different states: In the door closing automatic locking state, the lock body box approaches the lock port, the bevel lock tongue and the middle lock tongue are both hit against the lock port and are retracted, the middle lock tongue drives the limiting plate II to rotate, the limiting plate II drives the limiting plate I to rotate through the rotating plate, the limiting plate I is released from the hook of the square lock tongue, the square lock tongue is released and pops out through the spring, and the lower part of the limiting plate II falls into the clamping groove on the upper edge of the square lock tongue.

[0009] In the manual unlocking state, the knob is rotated to the unlocking position by the lock core, the knob drives the transmission plate on the back to move to the inside of the lock body box, and the transmission plate releases the constraint on the bevel lock tongue, the middle lock tongue and the square lock tongue; the handle I or the handle II drives the rotor to rotate 90°, the top of the rotor drives the upper bevel lock tongue to retract, the lower part of the rotor drives the lower rotating plate to rotate, and the bottom of the rotating plate drives the square lock tongue to retract; the square lock tongue retracts to the limiting position, and the square lock tongue drives the limiting plate II above it to fall into the clamping groove above it.

[0010] In the safe locking state, the knob is rotated to the locking position by the lock core, the knob drives the transmission plate on the back to move to the outside of the lock body box, the rotor is clamped into the clamping groove of the transmission plate under the action of the spring, the position of the transmission plate is locked, the transmission plate sequentially plays a constraint role on the bevel lock tongue, the middle lock tongue and the square lock tongue, and safe locking is performed.

[0011] The technical scheme sets different mechanical transmission and linkage modes, realizes automatic locking when closing the door, convenient manual unlocking and safe locking when needed, meets the needs of the door lock state in various scenes, and guarantees the safety and convenience of use. Specifically, in the automatic locking when closing the door, the force generated by the collision between the lock body box and the lock port makes the square lock tongue and the middle lock tongue retract, the connecting parts between the components drive the limiting plate to rotate, and the square lock tongue is ejected and locked; in the manual unlocking, the knob is rotated to drive the transmission plate to move and release the constraint on the lock tongue, and at the same time, the handle drives the rotor to rotate, and the lock tongue is retracted through the rotating plate; in the safe locking state, the knob is rotated to drive the transmission plate to move and lock the rotor, and the transmission plate forms a constraint on the lock tongue. The whole process utilizes the shape, position relationship and interaction of each component to convert the external force into the extension and retraction of the lock tongue and the rotation of the components, and realizes the switching of different states.

[0012] According to one embodiment of the present application, the bevel lock tongue material is 30CrMnTiA, which is treated by carburizing and quenching, and has a hardness of HRC58-62 and a push program circular arc surface radius of R30.8mm; the middle lock tongue material is 40CrNiMoA, which is treated by quenching and tempering, and has a hardness of HRC40-45 and a push program bevel angle of 45°±0.5°; the square lock tongue material is 20MnTiB, which is treated by carbonitriding, and has a hardness of HRC60-64 and a cross-sectional size of 13×35mm; the limiting plate I and the limiting plate II are made of 60Si2CrVA spring steel, which is treated by aging hardening, and has a hardness of HRC48-52, a thickness of the limiting plate II of 8.0±0.05mm, and a thickness of the limiting plate I of 5.0±0.05mm; the transmission plate is made of 60Si2CrVA spring steel, which is treated by aging hardening, and has a hardness of HRC48-52 and a thickness of 5.0±0.05mm; the rotating plate is made of ZG270-500 cast steel, which is treated by annealing to eliminate stress, and has a rotating radius of R35.0mm; the twist handle and the rotor are made of CuZn40Pb2 lead brass, and have a mortise width of 8.0±0.1mm; and the spring is made of SUS316 stainless steel wire, which is treated by stress relaxation.

[0013] Under the action of 1000N lateral force, the total deformation of the lock body box is ≤0.5mm, the shear force of the bevel lock tongue, the middle lock tongue and the square lock tongue is 15kN, the extrusion stress of the square lock tongue limiting groove is ≤70% of the material yield strength, and the rotating plate passes the bending fatigue test of 100 million cycles.

[0014] The present technical solution selects appropriate materials for each component according to the functional requirements and adopts corresponding processing technology, so that each component has appropriate mechanical properties, thereby more stably and reliably bearing various forces in the use process and ensuring the long-term normal use of the door lock. Specifically, different lock tongues are selected with specific materials and processing technology to obtain appropriate hardness, wear resistance and other properties, such as high hardness of the bevel lock tongue to adapt to frequent stretching and friction, moderate hardness of the middle lock tongue to balance strength and toughness; the limiting plate and the transmission plate are made of spring steel and are aged hardened to ensure elasticity; the rotating plate is made of cast steel and is annealed to eliminate stress to improve fatigue resistance; the twist handle and the rotor are selected from lead brass to facilitate processing and connection; the spring is treated by stress relaxation to maintain stable elastic force; the performance requirements of the lock body box deformation and the lock tongue shear force ensure that the structure is stable and the lock tongue works reliably under stress, and the performance of each component cooperatively guarantees the overall function of the door lock.

[0015] Compared with the prior art, the present application has the following beneficial effects: (1) The two handles and the twist handle have clear division of labor, the inside and outside handles are easy to operate for locking and unlocking, and the twist handle can constrain or release multiple lock tongues at one time, greatly improving the convenience of users using the door lock; (2) The door lock has three states of automatic locking when closing the door, manual unlocking and safety locking, which can meet the needs of different scenes for the state of the door lock and ensure safety. Attached Figure Description

[0016] Figure 1 This is the front view of the present invention.

[0017] Figure 2 This is a rear view of the present invention.

[0018] Figure 3 This is one of the state diagrams of the present invention.

[0019] Figure 4 This is the second state diagram of the present invention.

[0020] Figure 5 This is one of the internal diagrams of the present invention.

[0021] Figure 6 This is the second internal diagram of the present invention.

[0022] In the diagram: 1. Lock body box; 11. Angled bolt; 12. Center bolt; 13. Square bolt; 14. Limiting plate II; 15. Limiting plate I; 16. Rotor; 17. Transmission plate; 18. Rotating plate; 2. Lock opening; 3. Handle I; 4. Twist handle; 5. Handle II; 6. Lock cylinder. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1 like Figures 1 to 6 As shown, this embodiment provides a multi-functional side door lock based on dual-handle operation, including a lock body box 1 and a lock opening 2. The front of the lock body box 1 is provided with a handle I 3 and a toggle 4, and the back is provided with a handle II 5 and a lock cylinder 6. The lock body box 1 has a slanted bolt 11, a central bolt 12 and a square bolt 13, which correspond to the lock holes on the lock opening 2. The lock body box 1 is also provided with a limit plate II 14, a limit plate I 15, a transmission plate 17 and a rotating plate 18 to realize the automatic locking state when the door is closed, the manual unlocking state and the safety locking state.

[0025] like Figures 1 to 6As shown, the technical scheme is reasonable in layout of the oblique lock tongue 11, the middle lock tongue 12, the square lock tongue 13, the limiting plate, the transmission plate 17, the rotating plate 18 and other components in the lock body box 1, and utilizes the connection and cooperation relationship therebetween, such as the engagement of the limiting column and the groove and the clamping groove. Specifically, the inner and outer double handles convert the rotary operation into the extension and retraction actions of the oblique lock tongue 11 and the square lock tongue 13 through the rotor 16 and other components, so as to realize the door opening; the twist handle 4 drives the transmission plate 17 to move, and the oblique lock tongue 11, the middle lock tongue 12 and the square lock tongue 13 are constrained or released at one time, so that the locking or unlocking is completed, and various function states are realized. The double handles and the twist handle 4 have clear division of labor, and the operation is simple and easy to understand, so that the convenience of the user in using the door lock is greatly improved.

[0026] In addition, the multifunctional side door lock based on the double-handle operation according to the present application has the following additional technical features: According to one embodiment of the present application, the oblique lock tongue 11, the middle lock tongue 12 and the square lock tongue 13 are sequentially arranged in the lock body box 1 from top to bottom; the limiting plate II 14 is arranged between the oblique lock tongue 11 and the middle lock tongue 12, and the limiting plate II 14 is provided with a limiting contact matched with the middle lock tongue 12; the limiting plate I 15 is arranged between the middle lock tongue 12 and the square lock tongue 13, and the limiting plate I 15 is provided with a hook portion matched with the square lock tongue 13 below. The rotating plate 18 is arranged between the limiting plate II 14 and the limiting plate I 15, the lower end of the rotating plate 18 is provided with a limiting hole matched with the limiting column of the square lock tongue 13, the middle part of the rotating plate 18 is provided with a groove abutting against the limiting plate I 15 and the limiting plate II 14, and the top of the rotating plate 18 is provided with a clamping groove matched with the rotor 16. The bottom of the rotor 16 is provided with a clamping groove matched with the rotating plate 18, the top of the rotor 16 is provided with a push piece matched with the oblique lock tongue 11, and the push piece is provided with a limiting column matched with the oblique lock tongue 11. The transmission plate 17 is arranged between the square lock tongue 13 and the oblique lock tongue 11, the bottom of the transmission plate 17 is provided with the twist handle 4, the twist handle 4 is provided with a push piece matched with the transmission plate 17, the middle part of the transmission plate 17 is connected with the rotating plate 18 through the limiting column, and the top of the transmission plate 17 extends into the groove of the oblique lock tongue 11.

[0027] The technical scheme is characterized in that three kinds of lock latches are reasonably arranged, mechanical connection and cooperation among the limiting plate, the rotating plate 18, the rotor 16 and the transmission plate 17 are utilized, and the rotary motion of the handle 4 and the rotor 16 is converted into the linear extension and contraction motion of the lock latches. The rotating plate 18 is connected with the related components by means of the groove and the clamping groove, and power transmission and direction conversion are realized; the rotor 16 controls the action of the inclined lock latch 11 by means of the action of the push piece and the inclined lock latch 11; and the transmission plate 17 connects the handle 4 with the rotating plate 18 and the inclined lock latch 11, and forms a complete transmission chain, thereby ensuring that the lock latches act in the set direction. Specifically, the three kinds of lock latches are arranged from top to bottom, which is beneficial to space utilization and function division; the limiting plate accurately controls the extension and contraction range and direction of the lock latches by means of the limiting column and the hook, thereby preventing excessive movement or misplacement; the rotating plate 18 converts the rotary motion of the rotor 16 into the linear motion of the lock latches by means of the cooperation of the groove, the clamping groove, the limiting plate and the rotor 16; the rotor 16 realizes the flexible extension and contraction of the inclined lock latch 11 by means of the linkage of the push piece and the inclined lock latch 11; and the transmission plate 17 connects the handle 4 with the rotating plate 18 and the inclined lock latch 11, and transmits the rotary force of the handle 4 to the rotating plate 18, thereby driving the inclined lock latch 11 to act, and the movement of the transmission plate 17 is constrained by the limiting column of the rotating plate 18, thereby ensuring that the components cooperate with each other and realize stable opening and closing of the door lock.

[0028] According to one embodiment of the present application, the multifunctional side door lock based on double-handle control has three different states. In the door closing automatic locking state, the lock body box 1 approaches the lock hole 2, the inclined lock latch 11 and the middle lock latch 12 are all hit against the lock hole and are retracted, the middle lock latch 12 drives the limiting plate II 14 to rotate, the limiting plate II 14 drives the limiting plate I 15 to rotate through the rotating plate 18, the limiting plate I 15 is released from the hook part of the square lock latch 13, the square lock latch 13 is released and popped out through the spring, and the lower part of the limiting plate II 14 falls into the clamping groove on the upper edge of the square lock latch 13.

[0029] In the manual unlocking state, the handle 4 is rotated to the unlocking position through the lock cylinder 6, the handle 4 drives the transmission plate 17 on the back to move to the inside of the lock body box 1, and the transmission plate 17 is released from the constraint on the inclined lock latch 11, the middle lock latch 12 and the square lock latch 13; the handle I 3 or the handle II 5 drives the rotor 16 to rotate by 90°, the top of the rotor 16 drives the upper inclined lock latch 11 to retract, the lower part of the rotor 16 drives the lower rotating plate 18 to rotate, and the bottom of the rotating plate 18 drives the square lock latch 13 to retract; the square lock latch 13 is retracted to the limiting position, and the square lock latch 13 drives the limiting plate II 14 above it to fall into the clamping groove above it.

[0030] In the safe locking state, the handle 4 is rotated to the locking position through the lock cylinder 6, the handle 4 drives the transmission plate 17 on the back to move to the outside of the lock body box 1, the rotor 16 is clamped into the clamping groove of the transmission plate 17 under the action of the spring, the position of the transmission plate 17 is locked, and the transmission plate 17 sequentially plays a constraint role on the inclined lock latch 11, the middle lock latch 12 and the square lock latch 13, thereby realizing safe locking.

[0031] The technical scheme is characterized in that: when the door is closed and the lock is automatically locked, the force generated by the collision between the lock body box 1 and the lock hole 2 makes the square lock tongue 13 and the middle lock tongue 12 retract, the connecting belt between the components drives the limiting plate to rotate, and the square lock tongue 13 is popped out to be locked; when the door is manually unlocked, the twist handle 4 rotates to drive the transmission plate 17 to move, thereby releasing the constraint on the lock tongue, and the handle drives the rotor 16 to rotate, and the lock tongue is retracted through the rotating plate 18; in the safe locking state, the twist handle 4 rotates to make the transmission plate 17 move and lock the rotor 16, and the transmission plate 17 forms a constraint on the lock tongue. The shape, position relationship and interaction of each component are utilized to convert the external force into the extension and retraction of the lock tongue and the rotation of the component, so that the switching of different states is realized.

[0032] According to one embodiment of the present application, the material of the oblique lock tongue 11 is 30CrMnTiA, which is treated by carburizing quenching, and the hardness is HRC58-62, and the radius of the push arc surface is R30.8mm; the material of the middle lock tongue 12 is 40CrNiMoA, which is treated by quenching and tempering, and the hardness is HRC40-45, and the angle of the push inclined surface is 45°±0.5°; the material of the square lock tongue 13 is 20MnTiB, which is treated by carbonitriding, and the hardness is HRC60-64, and the cross-sectional size is 13×35mm; the materials of the limiting plate I 15 and the limiting plate II 14 are 60Si2CrVA spring steel, which is treated by aging hardening, and the hardness is HRC48-52, and the thickness of the limiting plate II 14 is 8.0±0.05mm, and the thickness of the limiting plate I 15 is 5.0±0.05mm; the material of the transmission plate 17 is 60Si2CrVA spring steel, which is treated by aging hardening, and the hardness is HRC48-52, and the thickness is 5.0±0.05mm; the material of the rotating plate 18 is ZG270-500 cast steel, which is treated by annealing stress relief, and the rotating radius is R35.0mm; the materials of the twist handle 4 and the rotor 16 are CuZn40Pb2 lead brass, and the width of the tenon is 8.0±0.1mm; the material of the spring is SUS316 stainless steel wire, which is treated by stress relaxation.

[0033] Under the action of 1000N lateral force on the lock body box 1, the total deformation of the lock body box 1 is ≤0.5mm, and the shear force of the oblique lock tongue 11, the middle lock tongue 12 and the square lock tongue 13 is 15kN; the extrusion stress of the limiting groove of the square lock tongue 13 is ≤70% of the material yield strength, and the rotating plate 18 passes the bending fatigue test of 1 million cycles.

[0034] The technical scheme selects suitable materials and corresponding processing techniques according to the functional requirements of each component, so that each component has appropriate mechanical properties, thereby more stably and reliably bearing various forces in the use process, and ensuring long-term normal use of the door lock. Specifically, different lock tongues are selected to have specific materials and processing techniques to obtain appropriate hardness, wear resistance and other properties, such as the high-hardness oblique lock tongue 11 to adapt to frequent extension and friction, and the moderate-hardness middle lock tongue 12 to balance strength and toughness; the limiting plate and the transmission plate 17 are made of spring steel and are aged to ensure elasticity; the rotating plate 18 is made of cast steel and is annealed to eliminate stress and improve fatigue resistance; the twist handle 4 and the rotor 16 are made of lead brass to facilitate processing and connection; the spring is stress-relaxed to maintain stable elasticity; the performance requirements of the lock body box 1 and the shear force of the lock tongue are ensured to ensure stable structure and reliable work of the lock tongue under stress, and the performance of each component cooperates to ensure the overall function of the door lock.

[0035] The use process of the above embodiment is as follows: As shown in Figures 1 to 6 When it is needed to close the door, the lock body box 1 gradually approaches the lock hole 2; in this process, the square lock tongue 13 and the middle lock tongue 12 will first hit the lock hole on the lock hole 2, and both of them will be retracted into the lock body box 1 after being hit; the middle lock tongue 12 drives the limiting plate II 14 to rotate when it is retracted, the limiting plate II 14 drives the rotating plate 18 to rotate through the connection with the rotating plate 18, and the rotating plate 18 further drives the limiting plate I 15 to rotate; as the limiting plate I 15 rotates, the hook part of the square lock tongue 13 is released, and the square lock tongue 13 is quickly ejected under the action of the internal spring and inserted into the lock hole of the lock hole 2, realizing automatic locking; at this time, the lower part of the limiting plate I 15 falls into the clamping groove on the upper edge of the square lock tongue 13, limiting the position of the lock tongue to prevent it from being ejected or retracted excessively; As shown in Figures 1 to 6 When it is needed to manually open the door, first rotate the twist handle 4 to the unlocking position through the lock cylinder 6; the rotation of the twist handle 4 will drive the transmission plate 17 on the back to move to the inside of the lock body box 1, and the transmission plate 17 will release the constraint on the oblique lock tongue 11, the middle lock tongue 12 and the square lock tongue 13 after moving; then, operate the handle I 3 or the handle II 5 to drive the rotor 16 to rotate by 90°; the top of the rotor 16 drives the oblique lock tongue 11 above to retract through the tab, the lower part of the rotor 16 drives the rotating plate 18 below to rotate, and the bottom of the rotating plate 18 drives the square lock tongue 13 to retract; when the square lock tongue 13 retracts to the limiting position, it will drive the limiting plate II 14 above it to fall into the clamping groove above it, at which time the door can be smoothly opened; As shown in Figures 1 to 6As shown, when the door needs to be securely locked, the knob 4 is rotated to the locking position by the lock core 6; the rotation of the knob 4 drives the back transmission plate 17 to move outwardly from the lock body box 1, and the rotor 16 is clamped into the clamping groove of the transmission plate 17 under the action of the internal spring, so that the position of the transmission plate 17 is locked; since the transmission plate 17 is associated with the inclined lock tongue 11, the middle lock tongue 12 and the square lock tongue 13 in sequence, after the position of the transmission plate 17 is locked, the transmission plate 17 will sequentially constrain the inclined lock tongue 11, the middle lock tongue 12 and the square lock tongue 13, so that they cannot be freely extended and retracted, thereby achieving secure locking and ensuring that the door cannot be easily opened in the locked state.

[0036] Although the present application is described in detail with reference to the preferred embodiments, the present application is not limited to this. Any modification or replacement of the embodiments of the present application made by those skilled in the art without departing from the spirit and essence of the present application shall be within the scope of the present application. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or replacements, which shall be within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A multifunctional side door lock based on double handle operation, characterized in that, The utility model provides a lock body box (1) and lock mouth (2), lock body box (1) front face sets up handle I (3) and twist handle (4), back sets up handle II (5) and lock core (6), lock body box (1) built-in oblique lock tongue (11), middle lock tongue (12) and square lock tongue (13), oblique lock tongue (11), middle lock tongue (12) and square lock tongue (13) correspond with lock mouth hole on lock mouth (2) respectively, lock body box (1) still sets up limit board II (14), limit board I (15), transmission plate (17) and rotating plate (18) in, realize the automatic locking state of closing door, manual unlocking state and safety locking state.

2. The dual handle based operation multi-functional side door lock according to claim 1, wherein, The oblique lock tongue (11), the middle lock tongue (12) and the square lock tongue (13) are sequentially arranged in the lock body box (1) from top to bottom; the limit board II (14) is arranged between the oblique lock tongue (11) and the middle lock tongue (12), and the limit board II (14) is provided with a limit contact matched with the middle lock tongue (12); the limit board I (15) is arranged between the middle lock tongue (12) and the square lock tongue (13), and the limit board I (15) is provided with a hook portion matched with the square lock tongue (13) below.

3. The dual handle based operation multi-functional side door lock according to claim 2, wherein, The rotating plate (18) is arranged between the limit board II (14) and the limit board I (15), the lower end of the rotating plate (18) is provided with a limit hole matched with the limit column of the square lock tongue (13), the middle part of the rotating plate (18) is provided with a groove abutting against the limit board I (15) and the limit board II (14), and the top of the rotating plate (18) is provided with a clamping groove matched with the rotor (16).

4. The dual handle based operation multi-functional side door lock according to claim 3, wherein, The bottom of the rotor (16) is provided with the clamping groove matched with the rotating plate (18), the top of the rotor (16) is provided with a push piece matched with the oblique lock tongue (11), and the push piece is provided with the limit column matched with the oblique lock tongue (11).

5. The dual handle based operation multi-functional side door lock according to claim 4, wherein, The transmission plate (17) is arranged between the square lock tongue (13) and the oblique lock tongue (11), the bottom of the transmission plate (17) is provided with the twist handle (4), the twist handle (4) is provided with the push piece matched with the transmission plate (17), the middle part of the transmission plate (17) is connected with the rotating plate (18) through the limit column, and the top of the transmission plate (17) extends into the groove of the oblique lock tongue (11).

6. The dual handle based operation multi-functional side door lock according to claim 5, wherein, In the automatic locking state of closing door, the lock body box (1) approaches the lock mouth (2), the oblique lock tongue (11) and the middle lock tongue (12) are all impacted and retracted, the middle lock tongue (12) drives the limit board II (14) to rotate, the limit board II (14) drives the limit board I (15) to rotate through the rotating plate (18), the limit board I (15) is released from the hook portion of the square lock tongue (13), the square lock tongue (13) is released and pops out through the spring, and the lower part of the limit board I (15) falls into the clamping groove on the upper edge of the square lock tongue (13).

7. The dual handle based operation multi-functional side door lock according to claim 5, wherein, In the manual unlocking state, the knob (4) is rotated to the unlocking position by the lock core (6), the knob (4) drives the transmission plate (17) on the back to move to the inside of the lock body box (1), and the transmission plate (17) releases the constraint on the inclined latch (11), the middle latch (12) and the square latch (13); the handle I (3) or the handle II (5) drives the rotor (16) to rotate 90°, the top of the rotor (16) drives the upper inclined latch (11) to retract, the lower part of the rotor (16) drives the rotating plate (18) below to rotate, and the bottom of the rotating plate (18) drives the square latch (13) to retract; the square latch (13) retracts to the limiting position, and the square latch (13) drives the limiting plate II (14) above it to fall into the clamping groove above it.

8. The dual handle based operation multi-functional side door lock according to claim 5, wherein, In the safe locking state, the knob (4) is rotated to the locking position by the lock core (6), the knob (4) drives the transmission plate (17) on the back to move to the outside of the lock body box (1), the rotor (16) is clamped into the clamping groove of the transmission plate (17) under the action of the spring, the position of the transmission plate (17) is locked, and the transmission plate (17) sequentially plays a constraint role on the inclined latch (11), the middle latch (12) and the square latch (13) to achieve safe locking.

9. The dual handle based operation multi-functional side door lock according to claim 1, wherein, The inclined latch (11) is made of 30CrMnTiA and is subjected to carburizing quenching treatment, with a hardness of HRC58-62 and a push stroke circular arc surface radius of R30.8mm; the middle latch (12) is made of 40CrNiMoA and is subjected to quenching and tempering treatment, with a hardness of HRC40-45 and a push stroke inclined surface angle of 45°±0.5°; the square latch (13) is made of 20MnTiB and is subjected to carbonitriding treatment, with a hardness of HRC60-64 and a cross-sectional size of 13×35mm; the limiting plate I (15) and the limiting plate II (14) are made of 60Si2CrVA spring steel and are subjected to aging hardening treatment, with a hardness of HRC48-52, a thickness of the limiting plate II (14) of 8.0±0.05mm and a thickness of the limiting plate I (15) of 5.0±0.05mm; the transmission plate (17) is made of 60Si2CrVA spring steel and is subjected to aging hardening treatment, with a hardness of HRC48-52 and a thickness of 5.0±0.05mm; the rotating plate (18) is made of ZG270-500 cast steel and is subjected to annealing stress relief treatment, with a rotating radius of R35.0mm; the knob (4) and the rotor (16) are made of CuZn40Pb2 lead brass, with a tenon width of 8.0±0.1mm; the spring is made of SUS316 stainless steel wire and is subjected to stress relaxation treatment.

10. The dual handle based operation multi-functional side door lock according to claim 9, wherein, Under the action of 1000N lateral force, the total deformation of the lock body box (1) is ≤0.5mm, the shear force of the inclined latch (11), the middle latch (12) and the square latch (13) is 15kN, the extrusion stress of the square latch (13) limiting groove is ≤70% of the material yield strength, and the rotating plate (18) passes the bending fatigue test of 100 million cycles.

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