An adaptive limiting device

Abstract

The present invention discloses an adaptive limiting device, which solves the technical problems that the upper cover of the existing protective door limiting device is prone to jamming and safety risks due to uneven force during operation. The present invention includes a socket seat matching with the bolt on the door body. A movable baffle of the socket hole is slidably arranged in the socket seat. A spring support is arranged below the movable baffle of the socket hole. A spring for supporting the movable baffle of the socket hole is slidably or clearance-fitted with the outer periphery of the spring support. In the present invention, the spring support can provide a guiding function for the spring. During the process that the bolt presses the movable baffle of the socket hole to move downward and the process that the spring props up the movable baffle of the socket hole to move upward, the spring can move vertically, avoiding the occurrence of tipping or jamming caused by uneven force on the movable baffle of the socket hole, and fully ensuring the use reliability and safety. In addition, the present invention can also solve the technical problems of the movable baffle of the socket hole sinking due to accidental touch and difficult maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of position limiting of protective revolving doors, in particular to an adaptive position limiting device. Background Art

[0002] During use, protective vertical rotating steel structure doors will be affected by wind loads and move. In order to prevent the door from being blown by the wind during normal use, a limit device should be designed; secondly, in order to ensure that the passage of equipment outside the door is not affected, no facilities protruding from the ground are allowed on the outside of the door. Therefore, a limit device protruding from the ground cannot be set. A special limit device needs to be designed, such as setting a pin hole outside the door so that the pin on the door body can cooperate with the pin hole on the ground.

[0003] Currently, the latch hole limiter for protective vertical rotating steel gates is typically drilled directly into pre-embedded ground components. Due to the heavy weight and long opening and closing span of some protective steel gates, the high force required to temporarily secure the gate in its open position under strong wind loads creates a significant resistance. Therefore, these gates are designed with a larger latch diameter. Conventional designs would result in a larger latch hole outside the door, making it extremely easy for passing personnel and vehicles to fall into the hole, potentially causing injury. Therefore, the latch hole in the limiter for protective steel gates must be closed when not in use.

[0004] For example, a hidden positioning latch mechanism disclosed in a Chinese utility model patent with an authorization announcement date of 2016.11.23 and authorization announcement number CN205713570U includes: a positioning core sleeve installed on a door leaf frame, a core rod provided in the positioning core sleeve, a handle connected to the core rod, a pin provided in the core rod, a screw plug provided at the top of the core rod, a first spring provided in the core rod with one end abutting against the screw plug and the other end abutting against the pin, and a latch seat installed in the ground. A step is provided in the middle of the positioning core sleeve. When the lower end of the core rod is inserted into the latch seat, the top end of the core rod touches the step.

[0005] However, the technical solution of the above utility model patent is aimed at the small side-hung doors commonly used in households. Although the upper cover of the bolt hole can automatically rebound to a position flush with the ground when the bolt does not extend into the bolt hole, when it is applied to the heavy-duty protective vertical rotating steel structure gate, due to the large diameter of the bolt hole, the upper cover that slides and rebounds inside it is prone to uneven left and right forces during operation, resulting in the risk of jamming the sliding upper cover. Moreover, when pedestrians or vehicles pass through the large bolt hole, the spring cannot provide effective support force, and the safety of personnel and vehicles cannot be guaranteed. In addition, the relative positions of the upper cover, lower cover and the second spring of the bolt seat are very compact. When the second spring or other components fail, it is difficult to replace and maintain them. It is necessary to chisel the surrounding concrete structure to replace the entire device and then re-pour the concrete road surface around the bolt seat.

[0006] In order to solve the defects existing in the prior art and avoid the risk of jamming, it is necessary to design a limiting device that can not only meet the needs of the bolt limit of the heavy-duty protective gate, but also ensure the safety of personnel, and the limiting device cannot protrude from the ground. Summary of the Invention

[0007] In view of the deficiencies in the above background technology, the present invention proposes an adaptive limiting device, which first solves the technical problems of uneven force during the operation of the upper cover of the existing protective door limiting device, resulting in jamming and safety risks; secondly, the present invention can also solve the technical problem that the movable baffle of the bolt hole sinks due to accidental contact by pedestrians and vehicles; in addition, the present invention can also solve the technical problems of difficult maintenance and low replacement efficiency of the existing protective door limiting device.

[0008] The technical solution of the present application is as follows:

[0009] An adaptive limiting device includes a bolt hole seat that matches the bolt on the door body. A bolt hole movable baffle is slidably arranged in the bolt hole seat. A spring support is arranged below the bolt hole movable baffle, and a spring that supports the bolt hole movable baffle is slidably or clearance-fitted with the outer circumference of the spring support.

[0010] In this technical solution, the spring support can provide a guiding function for the spring. During the process of the bolt pressing the bolt hole movable baffle downward and the spring pushing the bolt hole movable baffle upward, the spring can move vertically, avoiding the occurrence of overturning or jamming caused by uneven force on the bolt hole movable baffle, and fully ensuring the use reliability and safety.

[0011] Furthermore, the pin hole movable baffle includes a movable baffle cover plate that is slidably engaged with the inner wall of the pin hole seat. A movable baffle sleeve is provided on the lower end surface of the movable baffle cover plate. The inner wall of the spring is slidably or clearance-fitted with the outer wall of the spring support, and the outer wall is slidably or clearance-fitted with the inner wall of the movable baffle sleeve. This technical solution adds a movable baffle sleeve. The movable baffle sleeve and the spring support act together to not only provide a guiding effect on the spring from the upper and lower parts of the spring, but also provide a guiding effect from the inner circumference and outer circumference of the spring respectively.

[0012] Furthermore, a hollow cavity is provided inside the spring support, and a guide rod is provided in the hollow cavity. The upper end of the guide rod passes through the spring support and is connected to the pin hole movable baffle, and the lower end is in blocking fit with the guide hole at the top of the spring support. This technical solution further adds a guide rod. The guide rod, the movable baffle sleeve, and the spring support act together to provide multi-point guiding at the outer circumference, inner circumference, and core shaft part of the spring, forming a three-dimensional space guiding effect.

[0013] Furthermore, when the lower end of the guide rod is in blocking fit with the spring support, the upper end surface of the pin hole movable baffle is flush with the upper end surface of the pin hole seat. This technical solution provides a limiting effect on the basis of the above-mentioned invention content. While guiding, the guide rod can limit the extreme position of the pin hole movable baffle. During production, manufacturing, installation, and use, there is no need to specifically consider the free length of the spring. The end of the guide rod can ensure that the pin hole movable baffle is flush with the top of the pin hole seat. In addition, through the limiting effect of the guide rod, when the pin hole movable baffle is flush with the top of the pin hole seat, the spring has been compressed, which can provide sufficient support force for the pin hole movable baffle to ensure that the pin hole movable baffle has sufficient support force when not under pressure. When pedestrians or vehicles pass by, the pin hole movable baffle will not sink. Only when a specific downward pressing force is provided by the pin, the pin hole movable baffle will move downward along the pin hole seat.

[0014] Furthermore, a trigger head is provided at the bottom of the pin. A trigger hole matching the trigger head is provided on the pin hole movable baffle. A trigger block is provided below the trigger hole. A passive plug inserted into the trigger hole is provided on the upper end surface of the trigger block. A return spring is provided between the trigger block and the pin hole movable baffle. The trigger block is connected with a buckle through a connecting rod. A clamping groove is provided on the inner wall of the pin hole seat; when the trigger head does not enter the trigger hole to press down the passive plug, the clamping groove is in clamping fit with the buckle; when the trigger head enters the trigger hole to press down the passive plug, the clamping groove is disengaged from the buckle.

[0015] Specifically, this technical solution incorporates a locking mechanism that, under normal conditions, always locks the latch plate and the latch seat. Passing by pedestrians or vehicles will not compress the spring, eliminating the risk of accidental stepping on the latch plate. This also reduces reliance on spring strength. The locking mechanism's catch will only disengage from the slot when the passive plug is pressed downward by the trigger head on the latch. The dual action of the locking mechanism and the spring ensures the reliability of the limiter.

[0016] Furthermore, when the latch hole movable baffle includes a movable baffle cover and a movable baffle sleeve disposed on the lower end surface of the movable baffle cover, the trigger hole is disposed on the movable baffle cover, and a snap-fit movable groove is disposed on the sidewall of the movable baffle sleeve, wherein the snap fits in a sliding engagement with the snap-fit movable groove. This technical solution adds a snap-fit movable groove, which fully utilizes the support function and space of the movable baffle sleeve, resulting in high space utilization and a simple structure.

[0017] Furthermore, the buckle movable groove is perpendicular to the axial direction of the movable baffle sleeve, which further ensures the reliability of the locking pin hole movable baffle and the pin hole seat.

[0018] Furthermore, at least two return springs are provided, and the return springs are distributed equiangularly around the centroid of the trigger block.

[0019] Furthermore, the return spring is arranged obliquely or vertically.

[0020] Furthermore, a vertical rod is provided at the center of the lower end surface of the trigger block, and at least two connecting rods are hinged to the lower end of the vertical rod, and each connecting rod is connected to one of the buckles.

[0021] Furthermore, when there are at least two buckles, each buckle is distributed at equal angles around the vertical rod, and the connecting rods of each buckle can support each other, further ensuring the reliability of locking.

[0022] Furthermore, when the trigger head enters the trigger hole and depresses the passive plug, the outer end of the buckle slides against the inner wall of the latch hole seat. That is, when the latch presses down on the latch hole movable baffle, the movable baffle cover and the buckle both slide against the inner wall of the latch hole seat, acting in conjunction with the various guide structures of the spring to fully ensure the reliability of the limit device during use.

[0023] Furthermore, the length of the trigger head is shorter than the length of the trigger hole, and the length of the passive plug is equal to the length of the trigger hole. In this technical solution, when the trigger head presses down on the passive plug, the passive plug does not disengage from the trigger hole, fully ensuring the reliability of the reset of the trigger block. Furthermore, after the trigger block is reset, the passive plug can be flush with the upper end surface of the movable baffle of the latch hole, preventing foreign objects from falling in.

[0024] Furthermore, there are at least two trigger holes, and the trigger holes are equiangularly distributed around the centroid of the movable baffle cover plate. The trigger head and the passive plug are in one-to-one correspondence with the trigger holes.

[0025] Furthermore, when the trigger head does not enter the trigger hole to press down the passive plug, the upper end surface of the trigger block fits with the lower end surface of the movable baffle cover plate, the return spring is in its free length, and the connecting rod is in a horizontal position.

[0026] Furthermore, a cylindrical pin hole seat bracket is provided on the outer periphery of the pin hole seat. The pin hole seat is connected to the top of the pin hole seat bracket, and the spring support is connected to the bottom of the pin hole seat bracket. This technical solution provides a pin hole seat bracket, and other structures are arranged inside the pin hole seat bracket, which can not only provide an operating space for later maintenance and replacement, but also do not need to break the surrounding concrete structure during the replacement and maintenance process, and there is no need to re-pour the ground.

[0027] Compared with the prior art, the spring support in this technical solution can provide a guiding function for the spring. During the process of the pin pressing the movable baffle of the pin hole downward and the process of the spring pushing the movable baffle of the pin hole upward, the spring can move vertically, avoiding the occurrence of overturning or jamming caused by uneven force on the movable baffle of the pin hole, and fully ensuring the use reliability and safety.

[0028] The present invention is provided with a locking device. In the normal state, the locking device is always in a state of locking the movable baffle of the pin hole and the pin hole seat. Whether pedestrians or vehicles pass through the movable baffle of the pin hole, the spring will not be pressed, avoiding the risk of accidental stepping by personnel and vehicles, and at the same time reducing the dependence on the spring strength. Only when the trigger head on the pin presses down the passive plug, the buckle of the locking device will separate from the card slot. The dual action of the locking device and the spring ensures the reliability of the limiting device.

[0029] The present invention adopts a new sliding structure with three-level cooperation of the movable baffle of the pin hole and the pin hole seat, the movable baffle sleeve and the spring support, and the spring support guide rod to solve the risk of jamming caused by uneven left and right forces when the movable baffle of the pin hole slides in the pin hole seat. During the use of this device for the protective gate, it can resist the influence of wind load, play a role in limiting the gate, ensure that there are no holes or protrusions on the ground surface, be beautiful, and ensure the safety of passing vehicles and personnel. The present invention has a pure mechanical structure and can reduce energy input in areas with scarce resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To more clearly illustrate the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0031] Figure 1 It is a schematic diagram of the state structure of a specific embodiment of the present invention when the bolt is retracted;

[0032] Figure 2 For Figure 1 It is a schematic diagram of the state structure of the present invention when the bolt in

[0033] Figure 3 It is a schematic diagram of the state structure of another specific embodiment of the present invention when the bolt is retracted;

[0034] Figure 4 For Figure 3 It is a schematic diagram of the state structure of the present invention when the bolt in

[0035] Figure 5 For Figure 4 It is a partial enlarged view of the locking device in

[0036] Explanation of the reference numerals in the drawings:

[0037] 1 Bolt, 1-1 Trigger head;

[0038] 2 Movable baffle of the bolt hole, 2-1 Cover plate of the movable baffle, 2-2 Sleeve of the movable baffle, 2-3 Trigger hole, 2-4 Connecting seat;

[0039] 3 Connecting bolt;

[0040] 4, Bolt hole seat;

[0041] 5 Support of the bolt hole seat;

[0042] 6 Spring;

[0043] 7 Guide rod;

[0044] 8 Spring support;

[0045] 9 Locking device, 9-1 Snap sliding groove, 9-2 Snap, 9-3 Return spring, 9-4 Trigger block, 9-5 Link, 9-6 Card slot, 9-7 Passive plug. Specific embodiments

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] An adaptive limit device, as Figure 1 and Figure 2 shown, includes a pin hole seat 4 that matches the pin 1 on the door body. A pin hole movable baffle 2 is slidably arranged in the pin hole seat 4. A spring support 8 is arranged below the pin hole movable baffle 2. A spring 6 that supports the pin hole movable baffle 2 is in sliding fit or clearance fit with the outer periphery of the spring support 8. The spring 6 is preferably a high-strength spring.

[0048] In this technical solution, the spring support 8 can provide a guiding function for the spring 6. During the process of the pin 1 pressing the pin hole movable baffle 2 downward and the process of the spring 6 pushing the pin hole movable baffle 2 upward, the spring 6 can move vertically, avoiding the occurrence of tipping or jamming caused by uneven force on the pin hole movable baffle 2, and fully ensuring the use reliability and safety.

[0049] On the basis of the above embodiment, as a preferred embodiment, the pin hole movable baffle 2 includes a movable baffle cover plate 2-1 that is slidably fitted with the inner wall of the pin hole seat 4. A movable baffle sleeve 2-2 is arranged on the lower end surface of the movable baffle cover plate 2-1. The inner wall of the spring 6 is in sliding fit or clearance fit with the outer wall of the spring support 8, and the outer wall is in sliding fit or clearance fit with the inner wall of the movable baffle sleeve 2-2.

[0050] This technical solution adds a movable baffle sleeve 2-2. The movable baffle sleeve 2-2 and the spring support 8 act together to not only provide a guiding function for the spring 6 from the upper and lower parts of the spring 6, but also provide a guiding function from the inner circumference and outer circumference of the spring 6 respectively.

[0051] On the basis of the above embodiment, as a preferred embodiment, a hollow cavity is arranged inside the spring support 8. A guide rod 7 is arranged in the hollow cavity. The upper end of the guide rod 7 passes through the spring support 8 and is connected to the pin hole movable baffle 2, and the lower end is in blocking fit with the guide hole at the top of the spring support 8. Preferably, the guide rod 7 is a guide screw.

[0052] This technical solution further adds a guide rod 7. The guide rod 7, the movable baffle sleeve 2-2, and the spring support 8 act together to provide multi-point guidance at the outer circumference, inner circumference, and core axis of the spring 6, forming a three-dimensional space stereoscopic guiding effect.

[0053] On the basis of the above - mentioned embodiments, as a preferred embodiment, when the lower end of the guide rod 7 is in blocking cooperation with the spring support 8, the upper end surface of the movable baffle 2 of the pin hole is flush with the upper end surface of the pin hole seat 4.

[0054] This technical solution provides a limiting function on the basis of the above - mentioned invention content. While guiding, the guide rod 7 can limit the extreme position of the movable baffle 2 of the pin hole. During production, manufacturing, installation and use, there is no need to specifically consider the free length of the spring 6, and the end of the guide rod 7 can ensure that the upper end of the movable baffle 2 of the pin hole is flush with the top of the pin hole seat 4.

[0055] In addition, through the limiting function of the guide rod 7, when the upper end of the movable baffle 2 of the pin hole is flush with the top of the pin hole seat 4, the spring 6 has been compressed, which can provide sufficient supporting force for the movable baffle 2 of the pin hole, ensuring that the movable baffle 2 of the pin hole has sufficient supporting force when not under pressure. When pedestrians or vehicles pass by, the movable baffle 2 of the pin hole will not sink. Only when the pin 1 provides a specific downward pressing force, the movable baffle 2 of the pin hole will move downward along the pin hole seat 4.

[0056] The use process of this embodiment is as follows:

[0057] After the gate is opened in place, under the action of an external force, the pin 1 moves downward, pushing the movable baffle 2 of the pin hole to compress the spring 6 and move downward. During this process, the movable baffle cover 2 - 1 is pushed to move along the inner wall of the pin hole seat 4, and the spring 6 moves downward closely against the sleeve 2 - 2 of the movable baffle of the pin hole until the pin 1 moves in place. The guide screw and the spring support 8 play a guiding role to ensure the smooth insertion of the pin 1. After the pin 1 enters the pin hole, the self - adaptive limiting device takes effect, which can prevent the door leaf from displacing under the action of wind load.

[0058] When the gate is closed, the pin 1 retracts, and the movable baffle 2 of the pin hole moves upward along the inner wall of the pin hole seat 4 under the spring force of the high - strength spring 6. At this time, the end of the guide screw restricts the movable baffle 2 of the pin hole from protruding above the ground, ensuring that there are no protruding objects on the ground. And after the movable baffle 2 of the pin hole rises, the overall appearance is beautiful and there are no exposed holes on the ground. The supporting force provided by the high - strength spring can ensure that the movable baffle of the pin hole does not sink when passing personnel and vehicles pass safely.

[0059] On the basis of the above - mentioned embodiments, as a preferred embodiment, as Figures 3 - 5 shown, a locking device 9 is provided between the movable baffle 2 of the pin hole and the pin hole seat 4, specifically -

[0060] A trigger head 1-1 is provided at the bottom of the bolt 1. A trigger hole 2-3 matching the trigger head 1-1 is provided on the movable baffle 2 of the bolt hole. A trigger block 9-4 is provided below the trigger hole 2-3. A passive plug 9-7 inserted into the trigger hole is provided on the upper end face of the trigger block 9-4. A return spring 9-3 is provided between the trigger block 9-4 and the movable baffle 2 of the bolt hole. When the trigger head 1-1 does not enter the trigger hole 2-3 to press down the passive plug 9-7, the return spring 9-3 is stretched to provide a restoring elastic force for the trigger block 9-4.

[0061] The trigger block 9-4 is connected with a buckle 9-2 through a connecting rod 9-5. A clamping groove 9-6 is provided on the inner wall of the bolt hole seat 4; when the trigger head 1-1 does not enter the trigger hole 2-3 to press down the passive plug 9-7, the clamping groove 9-6 is in clamping fit with the buckle 9-2; when the trigger head 1-1 enters the trigger hole 2-3 to press down the passive plug 9-7, the clamping groove 9-6 is disengaged from the buckle 9-2.

[0062] That is, the locking device 9 is provided in this technical solution. In the normal state, the locking device 9 is always in the state of locking the movable baffle 2 of the bolt hole and the bolt hole seat 4. Whether it is a pedestrian or a vehicle passing through the movable baffle 2 of the bolt hole, the spring 6 will not be pressed, avoiding the risk of accidental stepping by personnel and vehicles, and at the same time reducing the dependence on the strength of the spring 6. Only when the passive plug 9-7 is pressed down by the trigger head 1-1 on the bolt 1, the buckle 9-2 of the locking device 9 will be separated from the clamping groove 9-6. The dual functions of the locking device 9 and the spring 6 ensure the reliability of the limiting device.

[0063] The using process of this embodiment is as follows:

[0064] Two trigger heads 1-1 are provided on the bolt 1. After the gate is opened in place, the bolt 1 moves downward under the action of an external force. The trigger head 1-1 on the bolt 1 first drives the trigger block 9-4 to move downward. The trigger block 9-4 drives the connecting rod 9-5 to move downward. The connecting rod 9-5 drives the buckle 9-2 to move inward along the buckle sliding groove 9-1 and disengage from the clamping groove 9-6 inside the bolt hole seat 4, and at the same time the return spring 9-3 is stretched. When the lower end face of the bolt 1 contacts and pushes the movable baffle 2 of the bolt hole, it pushes the movable baffle 2 of the bolt hole to compress the high-strength spring 6 and move downward. In this process, the movable baffle cover plate 2-1 moves along the inner wall of the bolt hole seat 4, and the high-strength spring 6 moves downward closely against the sleeve 2-2 of the movable baffle of the bolt hole until the bolt 1 moves in place. The guide screw and the spring support 8 play a guiding role to ensure the smooth insertion of the bolt 1.

[0065] When the gate is closed, the bolt 1 retracts. Under the action of the spring force of the high-strength spring 6, the movable baffle 2 of the bolt hole moves upward along the inner wall of the bolt hole seat 4. At this time, the end of the guiding screw restricts the movable baffle 2 of the bolt hole from protruding above the ground, ensuring that there are no protrusions on the ground. And after the movable baffle 2 of the bolt hole rises, the overall appearance is beautiful and there are no exposed cavities on the ground. The supporting force provided by the high-strength spring can ensure that the movable baffle of the bolt hole does not sink when passing personnel and vehicles safely. The clamping groove 9-6 is provided inside the bolt hole seat 4. When the bolt 1 disengages from the movable baffle 2 of the bolt hole, the return spring 9-3 retracts, driving the trigger block 9-4 to move upward. The trigger block 9-4 drives the connecting rod 9-5 to move upward, and the connecting rod 9-5 drives the buckle 9-2 to move outward along the buckle groove 9-1, so that the buckle 9-2 extends into the clamping groove 9-6 of the bolt hole seat 4, preventing accidental stepping and reducing the dependence on the spring 6 at the same time.

[0066] On the basis of the above-mentioned embodiment, as a preferred embodiment, when the movable baffle 2 of the bolt hole includes a movable baffle cover plate 2-1 and a movable baffle sleeve 2-2 provided on the lower end surface of the movable baffle cover plate 2-1, the trigger hole 2-3 is provided on the movable baffle cover plate 2-1, and a buckle movable groove 9-1 is provided on the side wall of the movable baffle sleeve 2-2, and the buckle 9-2 is slidably matched with the buckle movable groove 9-1.

[0067] The spring 6 supports the movable baffle cover plate 2-1 through the movable baffle sleeve 2-2. Specifically, a connecting seat 2-4 is provided below the locking device 9, and the connecting seat 2-4 is connected to the inner cavity of the movable baffle sleeve 2-2. The guiding rod 7 and the spring 6 are both connected to the connecting seat 2-4.

[0068] This technical solution adds a buckle movable groove 9-1. The buckle movable groove 9-1 makes full use of the supporting effect and space of the movable baffle sleeve 2-2, with high space utilization rate and simple structure.

[0069] On the basis of the above-mentioned embodiment, as a preferred embodiment, the buckle movable groove 9-1 is perpendicular to the axial direction of the movable baffle sleeve 2-2, further ensuring the reliability of locking the movable baffle 2 of the bolt hole and the bolt hole seat 4.

[0070] On the basis of the above-mentioned embodiment, as a preferred embodiment, at least two return springs 9-3 are provided, and each return spring 9-3 is equally angularly distributed around the centroid of the trigger block 9-4.

[0071] On the basis of the above-mentioned embodiment, as a preferred embodiment, the return spring 9-3 is inclined or vertically arranged.

[0072] On the basis of the above-described embodiments, as a preferred embodiment, a vertical rod is provided at the center of the lower end surface of the trigger block 9-4. At least two connecting rods 9-5 are hinged to the lower end of the vertical rod, and each connecting rod 9-5 is connected to one of the latches 9-2.

[0073] On the basis of the above-described embodiments, as a preferred embodiment, when at least two latches 9-2 are provided, the respective latches 9-2 are angularly distributed around the vertical rod, and the connecting rods 9-5 of the respective latches 9-2 can support each other, further ensuring the reliability of locking.

[0074] On the basis of the above-described embodiments, as a preferred embodiment, when the trigger head 1-1 enters the trigger hole 2-3 and presses down the passive plug 9-7, the outer end of the latch 9-2 slidably cooperates with the inner wall of the pin hole seat 4. That is, when the pin 1 presses down the movable baffle 2 of the pin hole, both the movable baffle cover 2-1 and the latch 9-2 slidably cooperate with the inner wall of the pin hole seat 4, and together with the respective guiding structures of the spring 6, the reliability of the limiting device during use is fully ensured.

[0075] On the basis of the above-described embodiments, as a preferred embodiment, the length of the trigger head 1-1 is less than the length of the trigger hole 2-3, and the length of the passive plug 9-7 is equal to the length of the trigger hole 2-3. In this technical solution, when the trigger head 1-1 presses down the passive plug 9-7, the passive plug 9-7 does not disengage from the trigger hole 2-3, fully ensuring the reliability of the reset of the trigger block 9-4. In addition, when the trigger block 9-4 is reset, the passive plug 9-7 can be flush with the upper end surface of the movable baffle 2 of the pin hole, preventing foreign objects from falling in.

[0076] On the basis of the above-described embodiments, as a preferred embodiment, at least two trigger holes 2-3 are provided, and the respective trigger holes 2-3 are angularly distributed around the centroid of the movable baffle cover 2-1, and the trigger head 1-1 and the passive plug 9-7 respectively correspond to the trigger holes 2-3.

[0077] On the basis of the above-described embodiments, as a preferred embodiment, when the trigger head 1-1 does not enter the trigger hole 2-3 to press down the passive plug 9-7, the upper end surface of the trigger block 9-4 is in contact with the lower end surface of the movable baffle cover 2-1, the return spring 9-3 is in its free length, and the connecting rod 9-5 is in a horizontal position.

[0078] On the basis of the above-described embodiments, as a preferred embodiment, a cylindrical pin hole seat bracket 5 is provided on the outer periphery of the pin hole seat 4. The pin hole seat 4 is connected to the top of the pin hole seat bracket 5, and the spring support 8 is connected to the bottom of the pin hole seat bracket 5.

[0079] The pin hole seat bracket 5 is fixed to the ground. A drain hole is provided at the bottom of the pin hole seat bracket 5. The spring support 8 is fixed to the pin hole seat bracket 5. The spring 6 is sleeved on the spring support 8. The pin hole seat 4 and the pin hole seat bracket 5 are fixed together by a connecting bolt 3. The movable baffle sleeve 2-2 is sleeved on the spring 6. The movable baffle cover plate 2-1 is sleeved inside the pin hole seat 4. The guide screw passes through the spring support 8 and is fixed to the pin hole movable baffle 2.

[0080] In this technical solution, the pin hole seat bracket 5 is provided, and other structures are arranged inside the pin hole seat bracket 5, which can not only provide an operating space for later maintenance and replacement, but also eliminate the need to break the surrounding concrete structure during the replacement and maintenance process, and there is no need to re-pour the ground.

[0081] The details not described in this invention are all conventional technical means well known to those skilled in the art.

[0082] The above content shows and describes the basic principles, main features and beneficial effects of the present invention. The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adaptive limiting device, comprising a latch hole seat (4) that matches a latch (1) on a door body, characterized in that: A latch hole movable baffle (2) is slidably arranged in the latch hole seat (4). A spring support (8) is arranged below the latch hole movable baffle (2). A spring (6) for supporting the latch hole movable baffle (2) is in sliding fit or clearance fit with the outer periphery of the spring support (8). The latch hole movable baffle (2) includes a movable baffle cover plate (2-1) in sliding fit with the inner wall of the latch hole seat (4). A movable baffle sleeve (2-2) is arranged on the lower end face of the movable baffle cover plate (2-1). The inner wall of the spring (6) is in sliding fit or clearance fit with the outer wall of the spring support (8), and the outer wall is in sliding fit or clearance fit with the inner wall of the movable baffle sleeve (2-2). A trigger head (1-1) is arranged at the bottom of the latch (1). A trigger hole (2-3) matching the trigger head (1-1) is arranged on the latch hole movable baffle (2). A trigger block (9-4) is arranged below the trigger hole (2-3). A passive plug (9-7) inserted into the trigger hole is arranged on the upper end face of the trigger block (9-4). A return spring (9-3) is arranged between the trigger block (9-4) and the latch hole movable baffle (2). The trigger block (9-4) is connected with a buckle (9-2) through a connecting rod (9-5). A clamping groove (9-6) is arranged on the inner wall of the latch hole seat (4). When the trigger head (1-1) does not enter the trigger hole (2-3) to press down the passive plug (9-7), the clamping groove (9-6) is in clamping fit with the buckle (9-2). When the trigger head (1-1) enters the trigger hole (2-3) to press down the passive plug (9-7), the clamping groove (9-6) is disengaged from the buckle (9-2).

2. The adaptive limiting device according to claim 1, wherein: A hollow cavity is arranged inside the spring support (8). A guide rod (7) is arranged in the hollow cavity. The upper end of the guide rod (7) passes through the spring support (8) and is connected with the latch hole movable baffle (2), and the lower end is in stop fit with the guide hole at the top of the spring support (8).

3. The adaptive limit device according to claim 2, wherein: When the lower end of the guide rod (7) is in stop fit with the spring support (8), the upper end face of the latch hole movable baffle (2) is flush with the upper end face of the latch hole seat (4).

4. The adaptive limit device according to any one of claims 1-3, characterized in that: When the latch hole movable baffle (2) includes a movable baffle cover plate (2-1) and a movable baffle sleeve (2-2) arranged on the lower end face of the movable baffle cover plate (2-1), the trigger hole (2-3) is arranged on the movable baffle cover plate (2-1). A buckle movable groove (9-1) is arranged on the side wall of the movable baffle sleeve (2-2). The buckle (9-2) is in sliding fit with the buckle movable groove (9-1). The spring (6) supports the movable baffle cover plate (2-1) through the movable baffle sleeve (2-2).

5. The adaptive limiting device according to claim 4, wherein: The buckle movable groove (9-1) is perpendicular to the axial direction of the movable baffle sleeve (2-2).

6. The adaptive limiting device according to claim 5, wherein: At least two return springs (9-3) are arranged, and each return spring (9-3) is equally angularly distributed around the centroid of the trigger block (9-4).

7. The adaptive limiting device according to claim 6, wherein: The return spring (9-3) is arranged obliquely or vertically.

8. The adaptive limit device according to any one of claims 5-7, characterized in that: A vertical rod is provided at the center of the lower end face of the trigger block (9-4). At least two connecting rods (9-5) are hinged to the lower end of the vertical rod, and each connecting rod (9-5) is connected to one of the fasteners (9-2).

9. The adaptive limit device according to claim 8, wherein: When at least two fasteners (9-2) are provided, the fasteners (9-2) are equally angularly distributed around the vertical rod.

10. The adaptive limit device according to any one of claims 5-7 and 9, characterized in that: When the trigger head (1-1) enters the trigger hole (2-3) and presses down the passive plug (9-7), the outer end of the fastener (9-2) is in sliding fit with the inner wall of the pin hole seat (4).

11. The adaptive limiting device according to claim 10, wherein: The length of the trigger head (1-1) is less than the length of the trigger hole (2-3), and the length of the passive plug (9-7) is equal to the length of the trigger hole (2-3).

12. The adaptive limiting device according to any one of claims 5-7, 9, and 11, characterized in that: At least two trigger holes (2-3) are provided, and the trigger holes (2-3) are equally angularly distributed around the centroid of the movable baffle cover (2-1). The trigger head (1-1) and the passive plug (9-7) correspond to the trigger holes (2-3) one by one.

13. The adaptive limiting device according to claim 12, wherein: When the trigger head (1-1) does not enter the trigger hole (2-3) to press down the passive plug (9-7), the upper end face of the trigger block (9-4) fits with the lower end face of the movable baffle cover (2-1), the return spring (9-3) is in the free length, and the connecting rod (9-5) is in the horizontal position.

14. The adaptive limiting device according to any one of claims 1-3, 5-7, 9, 11, and 13, characterized in that: A cylindrical pin hole seat bracket (5) is provided on the outer periphery of the pin hole seat (4). The pin hole seat (4) is connected to the top of the pin hole seat bracket (5), and the spring support (8) is connected to the bottom of the pin hole seat bracket (5).

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