Door lock device of door-closable self-locking machine-mounted oven and operation method

Abstract

The invention discloses a door lock device for a door-closable self-locking airborne oven and an operation method. The door lock device comprises a door knob assembly, a limiting assembly, an energy storage assembly, a door plate and a door frame, the door knob assembly comprises a knob handle, a knob rotating disc, a knob rotating shaft, a first door lock rod, a second door lock rod and a lock rod spring, and the knob rotating disc is installed on the door plate through the knob rotating shaft and is in sliding fit with the first door lock rod and the second door lock rod; the limiting assembly comprises a limiting supporting frame, a limiting spring and a rolling wheel. The limiting supporting frame limits the first door lock rod and the ejector rod through a supporting rod and a limiting rod. The energy storage assembly comprises an energy storage support, an ejector rod and an ejector rod spring. The first door lock rod is guided to enter a locking state and is limited to move. The door-closable self-locking machine-mounted oven door device is compact in structure, convenient to operate and reliable in locking. The device can be generally mounted on an aircraft kitchen plug-in, so that the kitchen plug-in is convenient to use.

Description

Technical Field

[0001] The invention relates to the field of aircraft kitchen oven door lock devices, and in particular to a door lock device for an onboard oven capable of closing and self-locking, and an operating method thereof. Background Art

[0002] When the aircraft is in a taxiing state, the door must be locked. However, domestic and foreign aviation kitchen oven door locks are locked manually by flight attendants, which brings a certain amount of workload to the flight attendants. If the flight attendants make a mistake and fail to lock the door, the food in the oven is likely to rush out of the oven, posing a risk to the personal safety of the people on board. In order to solve the above problem, the present invention designs an automatically locked door lock device. The flight attendants only need to push the oven door, and the oven door will automatically be locked. When the door needs to be opened, the door lock handle can be rotated to unlock and open the door. Summary of the invention

[0003] The object of the present invention is to provide a door lock device and an operating method for an onboard oven that can close and lock itself, so as to solve the above-mentioned problems existing in the prior art.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A door lock device for an onboard oven capable of closing and self-locking, comprising:

[0006] A door knob assembly, a limit assembly, an energy storage assembly, a door panel and a door frame; the door knob assembly includes a knob handle, a knob dial, a knob shaft, a first door lock rod, a second door lock rod and a lock rod spring; the knob dial is mounted on the door panel through the knob shaft and forms a sliding fit with the first door lock rod and the second door lock rod;

[0007] The limiting assembly includes a limiting support frame, a limiting spring and a roller. The limiting support frame limits the first door lock rod and the top rod through the support rod and the limiting rod;

[0008] The energy storage assembly includes an energy storage bracket, a push rod and a push rod spring. When the door panel is pushed in, the push rod triggers the push rod spring to release energy, driving the first door lock rod to move upward to a locked position;

[0009] The door frame is provided with a guide platform and a groove for guiding the first door lock rod into a locked state and limiting its displacement.

[0010] Preferably, the guide platform of the door frame is a slope structure, and the first door lock rod is compressed to an unlocking position when it contacts the guide platform.

[0011] Preferably, the elastic coefficients of the locking rod spring and the push rod spring are in the range of 5-20 N / mm, and the elastic coefficient of the push rod spring is greater than that of the locking rod spring.

[0012] Preferably, the knob dial is provided with an eccentric protruding shaft, and the protruding shaft forms a sliding fit with the first limiting groove of the first door lock rod, and the first door lock rod is driven to move vertically when the knob dial is rotated.

[0013] Preferably, the limiting rod is an L-shaped structure, and a roller is provided at the end thereof, and the roller forms a rolling contact with the first limiting groove of the first door lock rod and the second limiting groove of the top rod.

[0014] Preferably, the door panel is provided with a knob turntable limiting groove, a door lock rod limiting hole and a guide hole, and the first door lock rod passes through the door lock rod limiting hole and remains perpendicular to the door panel plane.

[0015] Preferably, the energy storage bracket is fixed to the inner side of the door panel by bolts, and a sliding guide rail is provided between the top rod and the energy storage bracket.

[0016] Preferably, the locking end of the first door lock rod is provided with a conical head, and the conical head forms an interference fit with the groove of the door frame;

[0017] A rubber buffer pad is provided in the groove of the door frame, and the thickness of the buffer pad is 2-5mm;

[0018] The cushion is made of high temperature resistant silicone rubber and can withstand temperatures ranging from -50°C to 200°C.

[0019] Based on the same concept, an operating method of a door lock device for an onboard oven with a closing and self-locking function comprises the following steps:

[0020] S100, door panel closing triggering step: pushing the door panel so that the first door lock rod contacts the guide platform of the door frame, the slope structure of the guide platform compresses the first door lock rod downward to an unlocking position, and at the same time, the roller of the first support rod contacts the first guide platform, and the slope structure of the first guide platform compresses the first support rod laterally;

[0021] S200, limit release step: when the first door lock rod moves down to a preset stroke, the first limit rod is disengaged from the first limit groove of the first door lock rod and the second limit groove of the ejector rod, thereby releasing the limit constraints on the first door lock rod and the ejector rod;

[0022] S300, spring energy release step: the push rod spring releases the pre-stored elastic potential energy, pushing the push rod to slide upward along the sliding guide rail of the energy storage bracket, and the top end of the push rod contacts the top plate of the first door lock rod and drives it to move upward;

[0023] S400, locking completion step: the conical head of the first door lock is embedded in the groove of the door frame, and self-locking is achieved through the interference fit between the conical head and the groove, thereby completing the automatic locking of the door panel.

[0024] Preferably, in step S100, the inclination angle of the guide platform is 30°-45°, and the compression stroke of the first door lock rod is 8-12 mm;

[0025] In step S300, the elastic coefficient of the ejector spring is 1.5-2 times that of the lock rod spring, and the sliding speed of the ejector is 10-20 mm / s;

[0026] After step S400 is completed, an unlocking operation step is also included: rotating the knob dial counterclockwise to a 90° position, and driving the first door lock rod to move vertically downward through the eccentric raised shaft of the knob dial to disengage the conical head from the groove.

[0027] In the unlocking operation step S200, the rotation torque of the knob dial is 0.5-1.2 N·m, and the downward movement stroke of the first door lock rod is equal to the locking stroke.

[0028] The beneficial effects of the present invention are as follows: the present invention discloses a door lock device and an operating method of a self-locking airborne oven door, comprising a door knob assembly, a limit assembly, an energy storage assembly, a door panel and a door frame; the door knob assembly comprises a knob handle, a knob turntable, a knob shaft, a first door lock rod, a second door lock rod and a lock rod spring, the knob turntable is mounted on the door panel through the knob shaft, and forms a sliding fit with the first door lock rod and the second door lock rod; the limit assembly comprises a limit support frame, a limit spring and a roller, the limit support frame limits the first door lock rod and the push rod through the support rod and the limit rod; the energy storage assembly comprises an energy storage bracket, a push rod and a push rod spring, the push rod triggers the push rod spring to release energy when the door panel is pushed in, and drives the first door lock rod to move upward to a locked position; the door frame is provided with a guide platform and a groove, which are used to guide the first door lock rod into a locked state and limit its displacement. The door lock device of the present invention has a compact structure, is easy to operate, and is reliable in locking. The device can be generally installed on an aircraft kitchen plug-in, which is convenient for the use of the kitchen plug-in. The door panel can be automatically locked when closed through mechanical linkage and spring energy storage mechanism without manual intervention; a secondary locking and anti-locking mechanism is added in the high-pressure cooking scenario to ensure the sealing and safety under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the door lock device of the present invention;

[0030] Figure 2 is a schematic diagram of the structure of the door knob assembly of the present invention;

[0031] Figure 3 It is a structural schematic diagram of another embodiment of the door knob assembly of the present invention;

[0032] Figure 4 is a structural schematic diagram of yet another embodiment of a door knob assembly of the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the door stop assembly and the energy storage assembly of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the energy storage bracket of the present invention;

[0035] Figure 7 It is a schematic structural diagram of the inner side of the door panel of the present invention;

[0036] Figure 8 It is a schematic structural diagram of the inner side of the door frame of the present invention;

[0037] Fig. 9 It is a structural schematic diagram of another embodiment of the inner side of the door panel of the present invention;

[0038] Fig.10 It is a schematic structural diagram of a door panel and a door frame of the present invention;

[0039] Fig.11 The present invention is a flow chart of the operation method of a door lock device for an onboard oven capable of closing and self-locking.

[0040] In the figure, 1, door knob assembly; 2, limit assembly; 3, energy storage assembly; 4, door panel; 5, door frame; 11, knob handle; 110, center hole; 111, first groove; 12, knob turntable; 120, boss; 121, raised shaft; 13, knob shaft; 131, first limit groove; 132, sliding groove; 133, give way groove; 134, top plate; 14, first door lock rod; 15, second door lock rod; 16, first pull rod; 17, second pull rod; 18, first lock rod spring; 19, second lock rod spring; 21, limit support frame; 211, first support rod; 212, second Support rod; 213, first limit rod; 214, second limit rod; 215, pull rod mounting hole; 22, limit spring; 23, roller; 231, roller shaft; 31, energy storage bracket; 32, push rod; 321, second limit slot; 323, buffer pad; 33, push rod spring; 41, knob dial limit slot; 411, first door lock rod limit hole; 412, second door lock rod limit hole; 413, third door lock rod limit hole; 414, fourth door lock rod limit hole; 421, first guide hole; 422, second guide hole; 51, groove; 52, first guide platform; 53, second guide platform. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] Reference Figures 1 to 10The door lock device of a self-locking oven with a closable door shown in the figure comprises a door knob assembly 1, a limit assembly 2, an energy storage assembly 3, a door panel 4 and a door frame 5; the door knob assembly 1 comprises a knob handle 11, a knob turntable 12, a knob shaft 13, a first door lock rod 14, a second door lock rod 15 and a lock rod spring; the knob turntable 12 is mounted on the door panel 4 through the knob shaft 13 and forms a sliding fit with the first door lock rod 14 and the second door lock rod 15; the lock rod spring to be explained comprises a first lock rod spring 18 and a second lock rod spring 19, which are respectively sleeved on the first pull rod 16 and the second pull rod 17. A center hole 110 is opened at the center position of the knob turntable 12, two protruding shafts 121 are arranged on one end surface, a rotating bearing is arranged on the protruding shaft 121, and a boss 120 is arranged on the other end surface. The knob turntable 12 is mounted in the limit groove of the knob turntable 12, and the knob shaft 13 passes through the center hole 110 of the knob turntable 12. The knob handle 11 is provided with a first groove 111; the first door lock rod 14 and the second door lock rod 15 have the same structure, and are provided with a sliding groove 132, a first limiting groove 131, a clearance groove 133, a top plate 134, a roller 23 and a roller shaft 231. A pull rod mounting hole 215 is provided at the door lock rod sliding groove 132.

[0043] In this embodiment, the knob handle 11 is fixed to the outside of the knob dial 12 by bolts, and is used to manually rotate and drive the door lock to open and close. The center of the knob dial forms a rotation pair with the shaft hole of the door panel 4 through the knob shaft 13.

[0044] It should be further explained here that the knob handle (11) is cast from aviation-grade aluminum alloy (grade 7075-T6), with an anodized surface. The first groove (111) has a depth of 5 mm and has a clearance fit with the boss (120) of the knob dial (12) (tolerance ±0.05 mm), and is fixed by four M3 stainless steel countersunk screws.

[0045] The knob turntable (12) is manufactured by powder metallurgy process, the eccentricity between the axis of the raised shaft (121) and the center hole (110) is 8mm, and the rotating bearing (122) is a miniature deep groove ball bearing (model 686ZZ, inner diameter 6mm, outer diameter 13mm) to ensure that the rolling friction coefficient of the sliding groove 132 is ≤0.01.

[0046] The synchronous drive system of two door lock rods is further described as follows:

[0047] The first door lock rod 14 and the second door lock rod 15 are made of 304 stainless steel, which are precisely drawn, with a diameter of Φ12 mm and a surface hard chrome plating treatment (thickness 20 μm).

[0048] Sliding groove 132: groove width 15 mm, groove depth 3 mm, embedded with polytetrafluoroethylene wear-resistant bushing (thickness 1 mm) to reduce wear with the raised shaft 121.

[0049] Tie rod mounting hole 215: hole diameter Φ6mm, the first tie rod 16 and the second tie rod 17 are made of spring steel (60Si2MnA), with a diameter of Φ5mm, and the surface is phosphated for rust prevention.

[0050] Further explanation of the mechanical interlocking mechanism of the limit component 2:

[0051] Modular design of the limit support frame 21: the support frame body is formed by bending Q235 steel plate with a thickness of 2mm. The first support rod 211 and the second support rod 212 have a diameter of Φ8mm, and the ends are processed with M6 threads to be threadedly connected with the two guide holes of the door panel 4.

[0052] Dynamic limit release logic principle:

[0053] Door closing trigger: When the door panel 4 is pushed in, the first guide platform 52 of the door frame 5 squeezes the first support rod 211, pushing the limiting support frame 21 to move 3 mm laterally, so that the first limiting rod 213 is separated from the first limiting groove 131;

[0054] Door opening reset: After the door is fully opened, the limit spring 22 (spring stiffness 8N / mm) pushes the support frame to reset, and the first limit rod 213 is re-engaged in the first limit groove 131 to lock the door lock rod position.

[0055] It should be noted here that the functions of the give way slot 133 mainly include the following aspects:

[0056] Structural avoidance: When the door lock rod slides up and down, the give way groove 133 provides movement space for the limiting component 2 (such as the first limiting rod 213 of the limiting support frame 21), avoiding mechanical interference with other components and ensuring smooth sliding.

[0057] Locking fit: When the door lock rod moves to the locking position, the clearance groove 133 cooperates with the guide platform on the door frame 5 or the raised structure of the limit assembly 2, and self-locking is achieved through the thrust of the limit spring 22 to prevent the door lock rod from accidentally falling out.

[0058] Energy transfer: Under the push of the energy storage component 3 (such as the push rod 32), the clearance groove 133 contacts the inclined surface or roller 23 at the end of the push rod 32, and the energy stored in the push rod spring 33 is converted into the vertical movement of the door lock rod, thereby assisting in completing the automatic locking action.

[0059] The knob handle 11 is matched with the raised shaft 121 of the knob dial 12 through the groove 51 and fixed with screws. The first door lock rod 14 and the second door lock rod 15 pass through the door lock rod limiting holes on the door panel 4 respectively and can slide up and down in the holes. The first door lock rod 14 and the second door lock rod 15 are in contact with the knob dial 12 through the rotating bearing on the raised shaft 121. The first pull rod 16 and the second pull rod 17 are installed in the pull rod installation hole 215 of the door lock rod, and the two lock rod springs are respectively sleeved on the pull rods. Rotating the knob handle 11 drives the knob dial 12 to rotate, and then drives the door lock rod to slide up and down through the knob shaft 13 on the raised shaft 121. The first door lock rod 14 and the second door lock rod 15 move up and down under the action of the spring, and are locked by cooperating with the guide platform and the groove 51 on the door frame 5. The pull rod and the lock rod spring: provide elastic force for the door lock rod to ensure the reliable movement of the door lock rod.

[0060] The limiting assembly 2 includes a limiting support frame 21, a limiting spring 22 and a roller 23. The limiting support frame 21 limits the first door lock rod 14 and the top rod 32 through the support rod and the limiting rod; it should be noted that the support rod includes: a first support rod 211 and a second support rod 212 are respectively installed on the limiting assembly 2, the limiting spring 22 is installed on the second support rod 212, and the limiting rod includes a first limiting rod 213 and a second limiting rod 214.

[0061] The first support rod 211 and the second support rod 212 on the limiting support frame 21 pass through the guide hole of the limiting assembly 2 of the door panel 4. The limiting spring 22 is sleeved on the limiting rod to provide a lateral thrust for the limiting support frame 21.

[0062] The limiting support frame 21 and the limiting rod: The limiting grooves of the door lock rod and the top rod 32 are passed through to limit the door lock rod and the top rod 32. The limiting spring 22 provides a lateral thrust for the support frame to ensure the reliable operation of the limiting assembly 2.

[0063] The energy storage assembly 3 includes an energy storage bracket 31, a push rod 32 and a push rod spring 33. When the door panel 4 is pushed in, the push rod 32 triggers the push rod spring 33 to release energy, driving the first door lock rod 14 to move upward to the locking position. A buffer pad 323 is provided on the end of the push rod 32, and the energy storage bracket 31 is provided with a mounting hole for the push rod 32; the push rod 32 is provided with a second limiting groove 321;

[0064] The energy storage bracket 31, the push rod 32 and the push rod spring 33 store energy, which is triggered after the door is pushed in, pushing the door lock rod to move upward to ensure the reliable locking of the door. At the same time, the thrust when closing the door is reduced.

[0065] Energy conversion and release of energy storage assembly 3: inclined transmission system of top rod 32;

[0066] The push rod 32 is made of 40Cr alloy steel after quenching and tempering, the top inclined push surface and the bottom inclined surface of the door lock rod are both at an inclination angle of 45°, and the contact surface is nitrided (hardness ≥ HV800);

[0067] Buffer pad 323: Made of high temperature resistant silicone rubber (Shore hardness 60A), 3mm thick, with a temperature resistance of -50°C to 200°C, fixed to the end of the top rod 32 by a buckle to reduce the impact noise of the door lock rod.

[0068] Energy storage and release process:

[0069] Compression stage: When the door is closed, the door lock rod moves down 5mm, and the first support rod 211 is pushed by the inclined surface of the guide platform 52 on the door frame, driving the support frame 21, the first limit rod 213 and the second limit rod 214 to move rightward, and compressing the limit spring 22 (elastic coefficient 15N / mm, initial compression 10mm), and the energy storage value reaches 0.75J;

[0070] Release stage: the limit is released. When the second limit rod 214 disengages from the limit groove of the push rod 32, the second limit rod 213 disengages from the first limit groove 131 of the first door lock rod 14, the first door lock rod 14 and the push rod 32 are released from the limit. At this time, the top plate 134 and the buffer pad 323 are in contact, and the push rod 32 pushes the first door lock rod 14 to move upward. The push rod spring 33 pushes the push rod 32 to move up 8mm, and the elastic force of the lock rod spring 18 (elastic coefficient 10N / mm) is superimposed, so that the conical head of the door lock rod is embedded in the groove 51 with an interference force of 20N.

[0071] The door frame 5 is provided with two guide platforms and a groove 51, which are used to guide the first door lock rod 14 into a locked state and limit its displacement. The guide platform includes a first guide platform 52 and a second guide platform 53. The energy storage assembly 3 is mounted on the door panel 4 by screws. The top rod 32 is installed in the mounting hole of the energy storage bracket 31 and slides relative to the energy storage bracket 31. The top rod spring 33 is sleeved on the top rod 32 to provide thrust for the top rod 32. The door panel 4 can rotate around the door frame 5 to achieve the opening and closing of the door. A first guide platform 52 is provided on the side of the door frame 5 for guiding the first support rod 211. A second guide platform 53 is provided on the upper part of the door frame 5 for guiding the first door lock rod 14, and a groove 51 is provided to limit the door lock rod.

[0072] Precision matching between guide platform and groove: composite guide structure of door frame 5:

[0073] The first guide platform 52 and the second guide platform 53 are designed with a 20° slope ( Fig.10 Dimensions), surface sprayed with molybdenum disulfide dry film lubricant (friction coefficient ≤ 0.1);

[0074] Groove 51: depth 15mm, inner wall is provided with two annular interference surfaces 511, interference amount 0.1mm, matching with the cone angle 60° of the conical head 142, forming self-locking;

[0075] Rubber buffer pad 323: vulcanized and bonded to the bottom of the groove 51, with a compression rebound rate of ≥90%, effectively absorbing the impact energy of the door lock rod.

[0076] Product assembly method:

[0077] The knob dial 12 in the door knob assembly 1 is installed in the knob dial limiting groove 41, the knob shaft 13 is installed in the center hole 110 of the knob dial 12, the first groove 111 of the knob handle 11 cooperates with the boss 120 of the knob dial 12, and then the knob handle 11 and the knob dial 12 are fixed by screws. Rotating the knob handle 11 can drive the knob dial 12 to rotate around the knob shaft 13.

[0078] The first door lock rod 14 passes through the first door lock rod limiting hole 411 and the second door lock rod limiting hole 412 on the door panel 4 respectively, and can slide up and down in the two door lock rod limiting holes; the sliding groove 132 on the first door lock rod 14 forms a contact fit with the rotating bearing on the raised shaft 121 of the knob dial 12, and the rotation of the knob dial 12 can drive the first door lock rod 14 to slide up and down. Similarly, the second door lock rod 15 is installed on the door panel 4, and the knob dial 12 can drive the second door lock rod 15 to slide up and down. The first pull rod 16 and the second pull rod 17 are respectively installed in the pull rod installation holes 215, and the first lock rod spring 18 and the second lock rod spring 19 are respectively sleeved on the first pull rod 16 and the second pull rod 17. The lock rod spring is mainly used to provide an upward elastic force to the first door lock rod 14 and a downward elastic force to the second door lock rod 15.

[0079] The lock rod compression spring support rod on the limit support frame 21 passes through the first guide hole 421 of the limit assembly 2 of the door panel 4, and the second support rod 212 passes through the second guide hole 422 of the limit assembly 2 of the door panel 4. The limit spring 22 is sleeved on the limit rod, and the limit support frame 21 can slide left and right on the door panel 4. The spring provides a lateral thrust for the support frame;

[0080] The energy storage assembly 3 is installed on the door panel 4 by screws, the push rod 32 is installed in the mounting hole of the energy storage bracket 31, and can slide relative to the energy storage bracket 31, the push rod spring 33 is sleeved on the push rod 32, and can provide thrust for the push rod 32; the push rod 32 can be pressed against the door lock rod top plate 134, and provide an upward thrust for the door lock rod.

[0081] The first limiting rod 213 on the limiting support frame 21 can pass through the limiting groove of the door lock rod to limit the door lock rod so that the first door lock rod 14 cannot slide upward; the second limiting rod 214 passes through the second limiting groove 321 on the top rod 32 to limit the top rod 32 so that the top rod 32 cannot slide upward.

[0082] The door panel 4 can rotate around the door frame 5 to realize the opening and closing of the door.

[0083] Working principle of the door lock: in the initial state, the first limiting rod 213 on the limiting assembly 2 passes through the door lock rod limiting groove 1, the door lock rod is limited and cannot move upward, and the ends of the first door lock rod 14 and the second are 5mm higher than the end face of the door panel 4; the second limiting rod 214 of the limiting assembly 2 passes through the limiting groove of the top rod 32 of the energy storage assembly 3, the top rod 32 is limited and cannot move upward, and the anti-collision pad on the top rod 32 is 5mm away from the top plate of the door lock rod; the first support rod 211 of the limiting assembly 2 extends out of the side end face of the door panel 4 by 5mm. When the door needs to be closed, the door panel 4 is pushed by hand, and the first door lock rod 14 first contacts the first guide platform 52 on the upper part of the door frame 5. Under the action of the first guide platform 52, the first door lock rod 14 is compressed downward by 5 mm, and the push rod 32 contacts the top plate 134 at this time; as the door panel 4 is closed inward, the first support rod 211 on the limit support frame 21 contacts the second guide platform 53 of the door frame 5, and under the action of the second guide platform 53, the first support rod 211 is compressed by 3 mm, and the first limit rod 213 and the second limit rod 214 are respectively moved out of the door lock rod limit groove and the push rod 32 limit groove, and no longer limit the door lock rod and the push rod 32. The first door lock rod 14 moves upward under the action of the lock rod spring, and the push rod 32 moves upward under the action of the push rod spring 33. The push rod 32 further drives the door lock rod to move upward, so that the door lock rod is more reliably extended and is limited to the groove 51 of the second guide platform 53 of the door frame 5, so that the door is securely locked. When the door needs to be opened, the door knob is turned, the first door lock rod 14 moves downward, the end of the first door lock rod 14 is flush with the door panel 4, and the door can be opened. After the door is opened outward, the first support rod 211 of the limit assembly 2 is no longer in contact with the first guide platform 52 of the door frame 5, and the limit support frame 21 moves outward under the action of the limit spring 22. At the same time, the first limit rod 213 and the second limit rod 214 respectively penetrate the limit groove of the door lock rod and the limit groove of the top rod 32, which can limit the two. When the door is completely opened, the door knob is released. Under the limit of the limit rod, the end of the door lock rod only extends 5mm from the end of the door panel 4, the end of the top rod 32 is 5mm away from the top plate on the door lock rod, and the first support rod 211 on the limit assembly 2 extends 5mm from the side of the door panel 4, and all return to the initial state.

[0084] Among them, the main function of the energy storage component 3 is to store energy for reliably pushing the door lock rod upward to ensure reliable locking. On the other hand, it is triggered only after the door is pushed in, mainly to reduce the door lock rod being easily pushed downward when the door is pushed in, greatly reducing the thrust when closing the door.

[0085] In this embodiment, the door closing self-locking process and the door opening unlocking process are further described as follows:

[0086] Dynamic workflow details

[0087] 1. Door closing and self-locking process (sequence breakdown)

[0088] Phase 1 (0-50% travel):

[0089] External force pushes the door → the first door lock rod 14 contacts the second guide platform 53 → the conical head at the top of the door lock rod moves down 5mm under the guidance of the slope → the top rod 32 is compressed to store energy;

[0090] Phase 2 (50-90% of the journey):

[0091] The limiting support frame 21 contacts the second guide platform 53 → the first support rod 211 retracts 3 mm → the second limiting rod 214 disengages from the second limiting groove 321 on the top rod 32, and at the same time, the first limiting rod 213 disengages from the first limiting groove 131 on the first door lock rod 14, and the top rod 32 and the first door lock rod are released from limiting;

[0092] Phase 3 (90-100% travel):

[0093] The push rod spring 33 and the two locking rod springs are released in coordination → the conical head 142 is embedded into the groove 51 at a speed of 1.2 m / s → the interference self-locking force reaches 200N.

[0094] 2. Door opening and unlocking process (reverse action)

[0095] Rotate the knob handle 90° → the raised shaft 121 drives the door lock rod to move down 8mm → the conical head 142 disengages from the groove 51 → the top plate 134 on the door lock rod pushes the top rod 32 on the top rod downward, and the top rod 32 returns to the initial position;

[0096] The door panel 4 is pulled outwards → the limiting spring 22 resets the support frame 21 → the first limiting rod 213 is re-engaged in the first limiting groove 131 to limit the first door lock rod and restrict its upward movement; the second limiting rod 214 is re-engaged in the second limiting groove 321 on the top rod 32 to limit the top rod and restrict its upward movement → the top rod 32 is reset to its initial position.

[0097] Preferably, the guide platform of the door frame 5 is a slope structure, and the first door lock rod 14 is compressed to an unlocking position when it contacts the guide platform.

[0098] Preferably, the elastic coefficients of the lock rod spring and the push rod 32 spring are in the range of 5-20 N / mm, and the elastic coefficient of the push rod 32 spring is greater than that of the lock rod spring.

[0099] Preferably, the knob dial 12 is provided with an eccentric protruding shaft 121 , and the protruding shaft 121 forms a sliding fit with the first limiting groove 131 of the first door lock rod 14 , and when the knob dial 12 is rotated, the first door lock rod 14 is driven to move vertically.

[0100] Preferably, the first support rod 211 is an L-shaped structure, and a roller 23 is provided at its end. The roller 23 forms a rolling contact with the first limiting groove 131 of the first door lock rod 14 and the second limiting groove 321 of the push rod 32 .

[0101] Preferably, the door panel 4 is provided with a knob dial limiting groove 41, a door lock rod limiting hole and a guide hole, and the first door lock rod 14 passes through the door lock rod limiting hole and remains perpendicular to the plane of the door panel 4. There are four door lock rod limiting holes, namely, the first door lock rod limiting hole 411, the second door lock rod limiting hole 412, the third door lock rod limiting hole 413 and the fourth door lock rod limiting hole 414, and they are coaxially arranged. There are two guide holes, namely, the first guide hole 421 and the second guide hole 422.

[0102] Preferably, the energy storage bracket 31 is fixed to the inner side of the door panel 4 by bolts, and a sliding guide rail is provided between the top rod 32 and the energy storage bracket 31 .

[0103] Preferably, a buffer pad 323 is provided at the end of the push rod 32 to prevent the push rod from making noise and being damaged by collision when contacting the top plate on the door lock rod.

[0104] Preferably, the locking end of the first door lock rod 14 is provided with a conical head, and the conical head forms an interference fit with the groove 51 of the door frame 5;

[0105] A rubber buffer pad 323 is provided in the groove 51 of the door frame 5, and the thickness of the buffer pad 323 is 2-5 mm;

[0106] The buffer pad 323 is made of high temperature resistant silicone rubber, and its tolerance temperature range is -50°C to 200°C.

[0107] Based on the same concept, an operating method of a door lock device for an onboard oven with a closing and self-locking function comprises the following steps:

[0108] S100, door panel closing triggering step: pushing the door panel to make the first door lock rod contact with the guide platform of the door frame, the slope structure of the guide platform compresses the first door lock rod downward to the unlocking position, and at the same time, the roller of the first support rod contacts with the first guide platform 52, and the slope structure of the first guide platform 52 compresses the first support rod laterally;

[0109] S200, limit release step: when the first door lock rod moves down to a preset stroke, the first limit rod is disengaged from the first limit groove of the first door lock rod and the second limit groove of the ejector rod, thereby releasing the limit constraints on the first door lock rod and the ejector rod;

[0110] S300, spring energy release step: the push rod spring releases the pre-stored elastic potential energy, pushing the push rod to slide upward along the sliding guide rail of the energy storage bracket, and the top end of the push rod contacts the top plate of the first door lock rod and drives it to move upward;

[0111] S400, locking completion step: the conical head of the first door lock is embedded in the groove of the door frame, and self-locking is achieved through the interference fit between the conical head and the groove, thereby completing the automatic locking of the door panel.

[0112] Preferably, in step S100, the inclination angle of the guide platform is 30°-45°, and the compression stroke of the first door lock rod is 8-12 mm;

[0113] In step S300, the elastic coefficient of the ejector spring is 1.5-2 times that of the lock rod spring, and the sliding speed of the ejector is 10-20 mm / s;

[0114] After step S400 is completed, an unlocking operation step is also included: rotating the knob dial counterclockwise from 12 to 90°, driving the first door lock rod to move vertically downward through the eccentric raised shaft of the knob dial, so that the conical head is out of the groove.

[0115] In the unlocking operation step S200, the rotation torque of the knob dial is 0.5-1.2 N·m, and the downward movement stroke of the first door lock rod is equal to the locking stroke.

[0116] The beneficial effects of the present invention are as follows: the present invention discloses a door lock device and an operating method of a self-locking airborne oven door, comprising: a door knob assembly, a limit assembly, an energy storage assembly, a door panel and a door frame; the door knob assembly comprises a knob handle, a knob turntable, a knob shaft, a first door lock rod, a second door lock rod and a lock rod spring, the knob turntable is installed on the door panel 4 through the knob shaft, and forms a sliding fit with the first door lock rod and the second door lock rod; the limit assembly comprises a limit support frame, a limit spring and a roller, the limit support frame limits the first door lock rod and the push rod through the support rod and the limit rod; the energy storage assembly comprises an energy storage bracket, a push rod and a push rod spring, the push rod triggers the push rod spring to release energy when the door panel is pushed in, and drives the first door lock rod to move upward to the locked position; the door frame is provided with a guide platform and a groove, which are used to guide the first door lock rod into a locked state and limit its displacement. The door lock device of the present invention has a compact structure, is easy to operate, and is reliable in locking. The device can be generally installed on an aircraft kitchen plug-in, which is convenient for the use of the kitchen plug-in. The door panel is automatically locked when closed through mechanical linkage and spring energy storage mechanism, without manual intervention; a secondary locking mechanism is added in the high-pressure cooking scenario to ensure sealing and safety under different working conditions. The double spring collaborative design is adopted: the difference in elastic coefficients of the two lock rod springs and the top rod spring (10N / mm vs. 15N / mm) enables phased force application to avoid jamming of the door lock rod movement;

[0117] Rolling friction resistance reduction: The raised shaft 121 and the sliding groove 132 adopt a bearing (686ZZ) for rolling contact, which reduces the sliding friction resistance by 83% compared with the traditional one;

[0118] Extreme environment resistance: The surface coating of the buffer pad 323 and the two guide platforms enables the device to work reliably under the conditions of -50℃~200℃ and 95% humidity;

[0119] Interference self-locking reinforcement: The double interference surface design of the conical head and the groove 51 can withstand the 12Grms random vibration test under the GJB150.16A-2009 standard.

[0120] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A door lock device for an onboard oven that can close and lock itself, characterized in that: include: A door knob assembly (1), a limit assembly (2), an energy storage assembly (3), a door panel (4) and a door frame (5); the door knob assembly (1) comprises a knob handle (11), a knob dial (12), a knob shaft (13), a first door lock rod (14), a second door lock rod (15) and a lock rod spring; the knob dial (12) is mounted on the door panel (4) via the knob shaft (13) and forms a sliding fit with the first door lock rod (14) and the second door lock rod (15); The limiting assembly (2) comprises a limiting support frame (21), a limiting spring (22) and a roller (23); the limiting support frame (21) limits the first door lock rod (14) and the top rod (32) through the support rod and the limiting rod; The energy storage assembly (3) comprises an energy storage bracket (31), a push rod (32) and a push rod spring (33); when the door panel (4) is pushed in, the push rod (32) triggers the push rod spring (33) to release energy, thereby driving the first door lock rod (14) to move upward to a locked position; The door frame (5) is provided with a guide platform and a groove (51) for guiding the first door lock rod (14) into a locked state and limiting its displacement.

2. The door lock device according to claim 1, characterized in that: The guide platform of the door frame (5) is a slope structure, and the first door lock rod (14) is compressed to an unlocking position when it contacts the guide platform.

3. The door lock device according to claim 1, characterized in that: The elastic coefficients of the locking rod spring and the push rod spring (33) are in the range of 5-20 N / mm, and the elastic coefficient of the push rod spring (33) is greater than that of the locking rod spring.

4. The door lock device according to claim 1, characterized in that: The knob dial (12) is provided with an eccentric protruding shaft (121), and the protruding shaft (121) forms a sliding fit with a first limiting groove (131) of the first door lock rod (14), and when the knob dial (12) is rotated, the first door lock rod (14) is driven to move vertically.

5. The door lock device according to claim 4, characterized in that: The limiting rod is an L-shaped structure, and a roller (23) is provided at the end thereof. The roller (23) forms rolling contact with a first limiting groove (131) of the first door lock rod (14) and a second limiting groove (321) of the top rod (32).

6. The door lock device according to claim 5, characterized in that: The door panel (4) is provided with a knob dial limiting groove (41), a door lock rod limiting hole and a guide hole, and the first door lock rod (14) passes through the door lock rod limiting hole and remains perpendicular to the plane of the door panel (4).

7. The door lock device according to claim 6, characterized in that: The energy storage bracket (31) is fixed to the inner side of the door panel (4) by means of bolts, and a sliding guide rail is provided between the top rod (32) and the energy storage bracket (31).

8. The door lock device according to claim 7, characterized in that: The locking end of the first door lock rod (14) is provided with a conical head, and the conical head forms an interference fit with the groove (51) of the door frame (5); A rubber buffer pad is provided in the groove (51) of the door frame (5), and the thickness of the buffer pad is 2-5 mm; The material of the buffer pad is high temperature resistant silicone rubber, and the tolerance temperature range is -50°C to 200°C.

9. A method for operating a door lock device for an onboard oven that can close and lock itself, characterized in that: The following steps are involved: S100, door panel closing triggering step: pushing the door panel so that the first door lock rod contacts the guide platform of the door frame, the slope structure of the guide platform compresses the first door lock rod downward to an unlocking position, and at the same time, the roller of the first support rod contacts the first guide platform, and the slope structure of the first guide platform compresses the first support rod laterally; S200, limit release step: when the first door lock rod moves down to a preset stroke, the first limit rod is disengaged from the first limit groove of the first door lock rod and the second limit groove of the ejector rod, thereby releasing the limit constraints on the first door lock rod and the ejector rod; S300, spring energy release step: the push rod spring releases the pre-stored elastic potential energy, pushing the push rod to slide upward along the sliding guide rail of the energy storage bracket, and the top end of the push rod contacts the top plate of the first door lock rod and drives it to move upward; S400, locking completion step: the conical head of the first door lock is embedded in the groove of the door frame, and self-locking is achieved through the interference fit between the conical head and the groove, thereby completing the automatic locking of the door panel.

10. The method according to claim 9, characterized in that In step S100, the inclination angle of the guide platform is 30°-45°, and the compression stroke of the first door lock rod is 8-12 mm; In step S300, the elastic coefficient of the push rod spring is 1.5-2 times that of the lock rod spring, and the sliding speed of the push rod is 10-20 mm / s; After the step S400 is completed, an unlocking operation step is also included: rotating the knob dial counterclockwise to a 90° position, and driving the first door lock rod to move vertically downward through the eccentric raised shaft of the knob dial to disengage the conical head from the groove. In the unlocking operation step S200, the rotation torque of the knob dial is 0.5-1.2 N·m, and the downward movement stroke of the first door lock rod is equal to the locking stroke.

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